X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/bc7e832521ad5f83283f7b12e8804d5f4c12aa0d..1068def90da2943d801cdddad05065b6438fc401:/vendor/assets/iD/iD.js

diff --git a/vendor/assets/iD/iD.js b/vendor/assets/iD/iD.js
index c3bc0c3eb..929da2dd8 100644
--- a/vendor/assets/iD/iD.js
+++ b/vendor/assets/iD/iD.js
@@ -1,60786 +1,58591 @@
 (function () {
-	var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
-
-	function getDefaultExportFromCjs (x) {
-		return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;
-	}
 
-	function createCommonjsModule(fn, basedir, module) {
-		return module = {
-		  path: basedir,
-		  exports: {},
-		  require: function (path, base) {
-	      return commonjsRequire(path, (base === undefined || base === null) ? module.path : base);
-	    }
-		}, fn(module, module.exports), module.exports;
-	}
+	var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
 
-	function commonjsRequire () {
-		throw new Error('Dynamic requires are not currently supported by @rollup/plugin-commonjs');
-	}
+	var check = function (it) {
+	  return it && it.Math == Math && it;
+	};
 
-	var isImplemented = function () {
-		var set, iterator, result;
-		if (typeof Set !== 'function') { return false; }
-		set = new Set(['raz', 'dwa', 'trzy']);
-		if (String(set) !== '[object Set]') { return false; }
-		if (set.size !== 3) { return false; }
-		if (typeof set.add !== 'function') { return false; }
-		if (typeof set.clear !== 'function') { return false; }
-		if (typeof set.delete !== 'function') { return false; }
-		if (typeof set.entries !== 'function') { return false; }
-		if (typeof set.forEach !== 'function') { return false; }
-		if (typeof set.has !== 'function') { return false; }
-		if (typeof set.keys !== 'function') { return false; }
-		if (typeof set.values !== 'function') { return false; }
+	// https://github.com/zloirock/core-js/issues/86#issuecomment-115759028
+	var global$F =
+	  // eslint-disable-next-line es/no-global-this -- safe
+	  check(typeof globalThis == 'object' && globalThis) ||
+	  check(typeof window == 'object' && window) ||
+	  // eslint-disable-next-line no-restricted-globals -- safe
+	  check(typeof self == 'object' && self) ||
+	  check(typeof commonjsGlobal == 'object' && commonjsGlobal) ||
+	  // eslint-disable-next-line no-new-func -- fallback
+	  (function () { return this; })() || Function('return this')();
 
-		iterator = set.values();
-		result = iterator.next();
-		if (result.done !== false) { return false; }
-		if (result.value !== 'raz') { return false; }
+	var objectGetOwnPropertyDescriptor = {};
 
-		return true;
+	var fails$N = function (exec) {
+	  try {
+	    return !!exec();
+	  } catch (error) {
+	    return true;
+	  }
 	};
 
-	// eslint-disable-next-line no-empty-function
-	var noop = function () {};
+	var fails$M = fails$N;
 
-	var _undefined = noop(); // Support ES3 engines
+	// Detect IE8's incomplete defineProperty implementation
+	var descriptors = !fails$M(function () {
+	  // eslint-disable-next-line es/no-object-defineproperty -- required for testing
+	  return Object.defineProperty({}, 1, { get: function () { return 7; } })[1] != 7;
+	});
 
-	var isValue = function (val) { return val !== _undefined && val !== null; };
+	var objectPropertyIsEnumerable = {};
 
-	var validValue = function (value) {
-		if (!isValue(value)) { throw new TypeError("Cannot use null or undefined"); }
-		return value;
-	};
+	var $propertyIsEnumerable$1 = {}.propertyIsEnumerable;
+	// eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+	var getOwnPropertyDescriptor$5 = Object.getOwnPropertyDescriptor;
 
-	var clear = function () {
-		validValue(this).length = 0;
-		return this;
-	};
+	// Nashorn ~ JDK8 bug
+	var NASHORN_BUG = getOwnPropertyDescriptor$5 && !$propertyIsEnumerable$1.call({ 1: 2 }, 1);
 
-	var isImplemented$1 = function () {
-		var numberIsNaN = Number.isNaN;
-		if (typeof numberIsNaN !== "function") { return false; }
-		return !numberIsNaN({}) && numberIsNaN(NaN) && !numberIsNaN(34);
-	};
+	// `Object.prototype.propertyIsEnumerable` method implementation
+	// https://tc39.es/ecma262/#sec-object.prototype.propertyisenumerable
+	objectPropertyIsEnumerable.f = NASHORN_BUG ? function propertyIsEnumerable(V) {
+	  var descriptor = getOwnPropertyDescriptor$5(this, V);
+	  return !!descriptor && descriptor.enumerable;
+	} : $propertyIsEnumerable$1;
 
-	var shim = function (value) {
-		// eslint-disable-next-line no-self-compare
-		return value !== value;
+	var createPropertyDescriptor$7 = function (bitmap, value) {
+	  return {
+	    enumerable: !(bitmap & 1),
+	    configurable: !(bitmap & 2),
+	    writable: !(bitmap & 4),
+	    value: value
+	  };
 	};
 
-	var isNan = isImplemented$1() ? Number.isNaN : shim;
+	var toString$2 = {}.toString;
 
-	var isImplemented$2 = function () {
-		var sign = Math.sign;
-		if (typeof sign !== "function") { return false; }
-		return sign(10) === 1 && sign(-20) === -1;
+	var classofRaw$1 = function (it) {
+	  return toString$2.call(it).slice(8, -1);
 	};
 
-	var shim$1 = function (value) {
-		value = Number(value);
-		if (isNaN(value) || value === 0) { return value; }
-		return value > 0 ? 1 : -1;
-	};
+	var fails$L = fails$N;
+	var classof$c = classofRaw$1;
 
-	var sign = isImplemented$2() ? Math.sign : shim$1;
+	var split$1 = ''.split;
 
-	var abs   = Math.abs
-	  , floor = Math.floor;
+	// fallback for non-array-like ES3 and non-enumerable old V8 strings
+	var indexedObject = fails$L(function () {
+	  // throws an error in rhino, see https://github.com/mozilla/rhino/issues/346
+	  // eslint-disable-next-line no-prototype-builtins -- safe
+	  return !Object('z').propertyIsEnumerable(0);
+	}) ? function (it) {
+	  return classof$c(it) == 'String' ? split$1.call(it, '') : Object(it);
+	} : Object;
 
-	var toInteger = function (value) {
-		if (isNaN(value)) { return 0; }
-		value = Number(value);
-		if (value === 0 || !isFinite(value)) { return value; }
-		return sign(value) * floor(abs(value));
+	// `RequireObjectCoercible` abstract operation
+	// https://tc39.es/ecma262/#sec-requireobjectcoercible
+	var requireObjectCoercible$e = function (it) {
+	  if (it == undefined) throw TypeError("Can't call method on " + it);
+	  return it;
 	};
 
-	var max       = Math.max;
+	// toObject with fallback for non-array-like ES3 strings
+	var IndexedObject$4 = indexedObject;
+	var requireObjectCoercible$d = requireObjectCoercible$e;
 
-	var toPosInteger = function (value) { return max(0, toInteger(value)); };
-
-	var indexOf           = Array.prototype.indexOf
-	  , objHasOwnProperty = Object.prototype.hasOwnProperty
-	  , abs$1               = Math.abs
-	  , floor$1             = Math.floor;
+	var toIndexedObject$b = function (it) {
+	  return IndexedObject$4(requireObjectCoercible$d(it));
+	};
 
-	var eIndexOf = function (searchElement/*, fromIndex*/) {
-		var i, length, fromIndex, val;
-		if (!isNan(searchElement)) { return indexOf.apply(this, arguments); }
+	var isObject$r = function (it) {
+	  return typeof it === 'object' ? it !== null : typeof it === 'function';
+	};
 
-		length = toPosInteger(validValue(this).length);
-		fromIndex = arguments[1];
-		if (isNaN(fromIndex)) { fromIndex = 0; }
-		else if (fromIndex >= 0) { fromIndex = floor$1(fromIndex); }
-		else { fromIndex = toPosInteger(this.length) - floor$1(abs$1(fromIndex)); }
+	var isObject$q = isObject$r;
 
-		for (i = fromIndex; i < length; ++i) {
-			if (objHasOwnProperty.call(this, i)) {
-				val = this[i];
-				if (isNan(val)) { return i; } // Jslint: ignore
-			}
-		}
-		return -1;
+	// `ToPrimitive` abstract operation
+	// https://tc39.es/ecma262/#sec-toprimitive
+	// instead of the ES6 spec version, we didn't implement @@toPrimitive case
+	// and the second argument - flag - preferred type is a string
+	var toPrimitive$7 = function (input, PREFERRED_STRING) {
+	  if (!isObject$q(input)) return input;
+	  var fn, val;
+	  if (PREFERRED_STRING && typeof (fn = input.toString) == 'function' && !isObject$q(val = fn.call(input))) return val;
+	  if (typeof (fn = input.valueOf) == 'function' && !isObject$q(val = fn.call(input))) return val;
+	  if (!PREFERRED_STRING && typeof (fn = input.toString) == 'function' && !isObject$q(val = fn.call(input))) return val;
+	  throw TypeError("Can't convert object to primitive value");
 	};
 
-	var create = Object.create, getPrototypeOf = Object.getPrototypeOf, plainObject = {};
+	var requireObjectCoercible$c = requireObjectCoercible$e;
 
-	var isImplemented$3 = function (/* CustomCreate*/) {
-		var setPrototypeOf = Object.setPrototypeOf, customCreate = arguments[0] || create;
-		if (typeof setPrototypeOf !== "function") { return false; }
-		return getPrototypeOf(setPrototypeOf(customCreate(null), plainObject)) === plainObject;
+	// `ToObject` abstract operation
+	// https://tc39.es/ecma262/#sec-toobject
+	var toObject$i = function (argument) {
+	  return Object(requireObjectCoercible$c(argument));
 	};
 
-	var map = { function: true, object: true };
-
-	var isObject = function (value) { return (isValue(value) && map[typeof value]) || false; };
-
-	var create$1 = Object.create, shim$2;
-
-	if (!isImplemented$3()) {
-		shim$2 = shim$3;
-	}
-
-	var create_1 = (function () {
-		var nullObject, polyProps, desc;
-		if (!shim$2) { return create$1; }
-		if (shim$2.level !== 1) { return create$1; }
-
-		nullObject = {};
-		polyProps = {};
-		desc = { configurable: false, enumerable: false, writable: true, value: undefined };
-		Object.getOwnPropertyNames(Object.prototype).forEach(function (name) {
-			if (name === "__proto__") {
-				polyProps[name] = {
-					configurable: true,
-					enumerable: false,
-					writable: true,
-					value: undefined
-				};
-				return;
-			}
-			polyProps[name] = desc;
-		});
-		Object.defineProperties(nullObject, polyProps);
-
-		Object.defineProperty(shim$2, "nullPolyfill", {
-			configurable: false,
-			enumerable: false,
-			writable: false,
-			value: nullObject
-		});
-
-		return function (prototype, props) {
-			return create$1(prototype === null ? nullObject : prototype, props);
-		};
-	})();
-
-	var objIsPrototypeOf = Object.prototype.isPrototypeOf
-	  , defineProperty   = Object.defineProperty
-	  , nullDesc         = { configurable: true, enumerable: false, writable: true, value: undefined }
-	  , validate;
+	var toObject$h = toObject$i;
 
-	validate = function (obj, prototype) {
-		validValue(obj);
-		if (prototype === null || isObject(prototype)) { return obj; }
-		throw new TypeError("Prototype must be null or an object");
-	};
+	var hasOwnProperty$3 = {}.hasOwnProperty;
 
-	var shim$3 = (function (status) {
-		var fn, set;
-		if (!status) { return null; }
-		if (status.level === 2) {
-			if (status.set) {
-				set = status.set;
-				fn = function (obj, prototype) {
-					set.call(validate(obj, prototype), prototype);
-					return obj;
-				};
-			} else {
-				fn = function (obj, prototype) {
-					validate(obj, prototype).__proto__ = prototype;
-					return obj;
-				};
-			}
-		} else {
-			fn = function self(obj, prototype) {
-				var isNullBase;
-				validate(obj, prototype);
-				isNullBase = objIsPrototypeOf.call(self.nullPolyfill, obj);
-				if (isNullBase) { delete self.nullPolyfill.__proto__; }
-				if (prototype === null) { prototype = self.nullPolyfill; }
-				obj.__proto__ = prototype;
-				if (isNullBase) { defineProperty(self.nullPolyfill, "__proto__", nullDesc); }
-				return obj;
-			};
-		}
-		return Object.defineProperty(fn, "level", {
-			configurable: false,
-			enumerable: false,
-			writable: false,
-			value: status.level
-		});
-	})(
-		(function () {
-			var tmpObj1 = Object.create(null)
-			  , tmpObj2 = {}
-			  , set
-			  , desc = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__");
-
-			if (desc) {
-				try {
-					set = desc.set; // Opera crashes at this point
-					set.call(tmpObj1, tmpObj2);
-				} catch (ignore) {}
-				if (Object.getPrototypeOf(tmpObj1) === tmpObj2) { return { set: set, level: 2 }; }
-			}
-
-			tmpObj1.__proto__ = tmpObj2;
-			if (Object.getPrototypeOf(tmpObj1) === tmpObj2) { return { level: 2 }; }
-
-			tmpObj1 = {};
-			tmpObj1.__proto__ = tmpObj2;
-			if (Object.getPrototypeOf(tmpObj1) === tmpObj2) { return { level: 1 }; }
-
-			return false;
-		})()
-	);
-
-	var setPrototypeOf = isImplemented$3() ? Object.setPrototypeOf : shim$3;
-
-	var validCallable = function (fn) {
-		if (typeof fn !== "function") { throw new TypeError(fn + " is not a function"); }
-		return fn;
+	var has$j = Object.hasOwn || function hasOwn(it, key) {
+	  return hasOwnProperty$3.call(toObject$h(it), key);
 	};
 
-	// ES3 safe
-	var _undefined$1 = void 0;
+	var global$E = global$F;
+	var isObject$p = isObject$r;
 
-	var is = function (value) { return value !== _undefined$1 && value !== null; };
+	var document$3 = global$E.document;
+	// typeof document.createElement is 'object' in old IE
+	var EXISTS = isObject$p(document$3) && isObject$p(document$3.createElement);
 
-	// prettier-ignore
-	var possibleTypes = { "object": true, "function": true, "undefined": true /* document.all */ };
-
-	var is$1 = function (value) {
-		if (!is(value)) { return false; }
-		return hasOwnProperty.call(possibleTypes, typeof value);
+	var documentCreateElement$1 = function (it) {
+	  return EXISTS ? document$3.createElement(it) : {};
 	};
 
-	var is$2 = function (value) {
-		if (!is$1(value)) { return false; }
-		try {
-			if (!value.constructor) { return false; }
-			return value.constructor.prototype === value;
-		} catch (error) {
-			return false;
-		}
-	};
+	var DESCRIPTORS$m = descriptors;
+	var fails$K = fails$N;
+	var createElement$1 = documentCreateElement$1;
 
-	var is$3 = function (value) {
-		if (typeof value !== "function") { return false; }
+	// Thank's IE8 for his funny defineProperty
+	var ie8DomDefine = !DESCRIPTORS$m && !fails$K(function () {
+	  // eslint-disable-next-line es/no-object-defineproperty -- requied for testing
+	  return Object.defineProperty(createElement$1('div'), 'a', {
+	    get: function () { return 7; }
+	  }).a != 7;
+	});
 
-		if (!hasOwnProperty.call(value, "length")) { return false; }
+	var DESCRIPTORS$l = descriptors;
+	var propertyIsEnumerableModule$2 = objectPropertyIsEnumerable;
+	var createPropertyDescriptor$6 = createPropertyDescriptor$7;
+	var toIndexedObject$a = toIndexedObject$b;
+	var toPrimitive$6 = toPrimitive$7;
+	var has$i = has$j;
+	var IE8_DOM_DEFINE$1 = ie8DomDefine;
 
-		try {
-			if (typeof value.length !== "number") { return false; }
-			if (typeof value.call !== "function") { return false; }
-			if (typeof value.apply !== "function") { return false; }
-		} catch (error) {
-			return false;
-		}
+	// eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+	var $getOwnPropertyDescriptor$1 = Object.getOwnPropertyDescriptor;
 
-		return !is$2(value);
+	// `Object.getOwnPropertyDescriptor` method
+	// https://tc39.es/ecma262/#sec-object.getownpropertydescriptor
+	objectGetOwnPropertyDescriptor.f = DESCRIPTORS$l ? $getOwnPropertyDescriptor$1 : function getOwnPropertyDescriptor(O, P) {
+	  O = toIndexedObject$a(O);
+	  P = toPrimitive$6(P, true);
+	  if (IE8_DOM_DEFINE$1) try {
+	    return $getOwnPropertyDescriptor$1(O, P);
+	  } catch (error) { /* empty */ }
+	  if (has$i(O, P)) return createPropertyDescriptor$6(!propertyIsEnumerableModule$2.f.call(O, P), O[P]);
 	};
 
-	var classRe = /^\s*class[\s{/}]/, functionToString = Function.prototype.toString;
-
-	var is$4 = function (value) {
-		if (!is$3(value)) { return false; }
-		if (classRe.test(functionToString.call(value))) { return false; }
-		return true;
-	};
+	var objectDefineProperty = {};
 
-	var isImplemented$4 = function () {
-		var assign = Object.assign, obj;
-		if (typeof assign !== "function") { return false; }
-		obj = { foo: "raz" };
-		assign(obj, { bar: "dwa" }, { trzy: "trzy" });
-		return obj.foo + obj.bar + obj.trzy === "razdwatrzy";
-	};
+	var isObject$o = isObject$r;
 
-	var isImplemented$5 = function () {
-		try {
-			Object.keys("primitive");
-			return true;
-		} catch (e) {
-			return false;
-		}
+	var anObject$m = function (it) {
+	  if (!isObject$o(it)) {
+	    throw TypeError(String(it) + ' is not an object');
+	  } return it;
 	};
 
-	var keys = Object.keys;
-
-	var shim$4 = function (object) { return keys(isValue(object) ? Object(object) : object); };
-
-	var keys$1 = isImplemented$5() ? Object.keys : shim$4;
+	var DESCRIPTORS$k = descriptors;
+	var IE8_DOM_DEFINE = ie8DomDefine;
+	var anObject$l = anObject$m;
+	var toPrimitive$5 = toPrimitive$7;
 
-	var max$1   = Math.max;
+	// eslint-disable-next-line es/no-object-defineproperty -- safe
+	var $defineProperty$1 = Object.defineProperty;
 
-	var shim$5 = function (dest, src/*, …srcn*/) {
-		var arguments$1 = arguments;
-
-		var error, i, length = max$1(arguments.length, 2), assign;
-		dest = Object(validValue(dest));
-		assign = function (key) {
-			try {
-				dest[key] = src[key];
-			} catch (e) {
-				if (!error) { error = e; }
-			}
-		};
-		for (i = 1; i < length; ++i) {
-			src = arguments$1[i];
-			keys$1(src).forEach(assign);
-		}
-		if (error !== undefined) { throw error; }
-		return dest;
+	// `Object.defineProperty` method
+	// https://tc39.es/ecma262/#sec-object.defineproperty
+	objectDefineProperty.f = DESCRIPTORS$k ? $defineProperty$1 : function defineProperty(O, P, Attributes) {
+	  anObject$l(O);
+	  P = toPrimitive$5(P, true);
+	  anObject$l(Attributes);
+	  if (IE8_DOM_DEFINE) try {
+	    return $defineProperty$1(O, P, Attributes);
+	  } catch (error) { /* empty */ }
+	  if ('get' in Attributes || 'set' in Attributes) throw TypeError('Accessors not supported');
+	  if ('value' in Attributes) O[P] = Attributes.value;
+	  return O;
 	};
 
-	var assign = isImplemented$4() ? Object.assign : shim$5;
-
-	var forEach = Array.prototype.forEach, create$2 = Object.create;
+	var DESCRIPTORS$j = descriptors;
+	var definePropertyModule$7 = objectDefineProperty;
+	var createPropertyDescriptor$5 = createPropertyDescriptor$7;
 
-	var process$1 = function (src, obj) {
-		var key;
-		for (key in src) { obj[key] = src[key]; }
+	var createNonEnumerableProperty$e = DESCRIPTORS$j ? function (object, key, value) {
+	  return definePropertyModule$7.f(object, key, createPropertyDescriptor$5(1, value));
+	} : function (object, key, value) {
+	  object[key] = value;
+	  return object;
 	};
 
-	// eslint-disable-next-line no-unused-vars
-	var normalizeOptions = function (opts1/*, …options*/) {
-		var result = create$2(null);
-		forEach.call(arguments, function (options) {
-			if (!isValue(options)) { return; }
-			process$1(Object(options), result);
-		});
-		return result;
-	};
+	var redefine$g = {exports: {}};
 
-	var str = "razdwatrzy";
+	var global$D = global$F;
+	var createNonEnumerableProperty$d = createNonEnumerableProperty$e;
 
-	var isImplemented$6 = function () {
-		if (typeof str.contains !== "function") { return false; }
-		return str.contains("dwa") === true && str.contains("foo") === false;
+	var setGlobal$3 = function (key, value) {
+	  try {
+	    createNonEnumerableProperty$d(global$D, key, value);
+	  } catch (error) {
+	    global$D[key] = value;
+	  } return value;
 	};
 
-	var indexOf$1 = String.prototype.indexOf;
+	var global$C = global$F;
+	var setGlobal$2 = setGlobal$3;
 
-	var shim$6 = function (searchString/*, position*/) {
-		return indexOf$1.call(this, searchString, arguments[1]) > -1;
-	};
+	var SHARED = '__core-js_shared__';
+	var store$4 = global$C[SHARED] || setGlobal$2(SHARED, {});
 
-	var contains = isImplemented$6() ? String.prototype.contains : shim$6;
+	var sharedStore = store$4;
 
-	var d_1 = createCommonjsModule(function (module) {
+	var store$3 = sharedStore;
 
+	var functionToString = Function.toString;
 
+	// this helper broken in `core-js@3.4.1-3.4.4`, so we can't use `shared` helper
+	if (typeof store$3.inspectSource != 'function') {
+	  store$3.inspectSource = function (it) {
+	    return functionToString.call(it);
+	  };
+	}
 
-	var d = (module.exports = function (dscr, value/*, options*/) {
-		var c, e, w, options, desc;
-		if (arguments.length < 2 || typeof dscr !== "string") {
-			options = value;
-			value = dscr;
-			dscr = null;
-		} else {
-			options = arguments[2];
-		}
-		if (is(dscr)) {
-			c = contains.call(dscr, "c");
-			e = contains.call(dscr, "e");
-			w = contains.call(dscr, "w");
-		} else {
-			c = w = true;
-			e = false;
-		}
+	var inspectSource$3 = store$3.inspectSource;
 
-		desc = { value: value, configurable: c, enumerable: e, writable: w };
-		return !options ? desc : assign(normalizeOptions(options), desc);
-	});
+	var global$B = global$F;
+	var inspectSource$2 = inspectSource$3;
 
-	d.gs = function (dscr, get, set/*, options*/) {
-		var c, e, options, desc;
-		if (typeof dscr !== "string") {
-			options = set;
-			set = get;
-			get = dscr;
-			dscr = null;
-		} else {
-			options = arguments[3];
-		}
-		if (!is(get)) {
-			get = undefined;
-		} else if (!is$4(get)) {
-			options = get;
-			get = set = undefined;
-		} else if (!is(set)) {
-			set = undefined;
-		} else if (!is$4(set)) {
-			options = set;
-			set = undefined;
-		}
-		if (is(dscr)) {
-			c = contains.call(dscr, "c");
-			e = contains.call(dscr, "e");
-		} else {
-			c = true;
-			e = false;
-		}
-
-		desc = { get: get, set: set, configurable: c, enumerable: e };
-		return !options ? desc : assign(normalizeOptions(options), desc);
-	};
-	});
+	var WeakMap$1 = global$B.WeakMap;
 
-	var eventEmitter = createCommonjsModule(function (module, exports) {
+	var nativeWeakMap = typeof WeakMap$1 === 'function' && /native code/.test(inspectSource$2(WeakMap$1));
 
-	var apply = Function.prototype.apply, call = Function.prototype.call
-	  , create = Object.create, defineProperty = Object.defineProperty
-	  , defineProperties = Object.defineProperties
-	  , hasOwnProperty = Object.prototype.hasOwnProperty
-	  , descriptor = { configurable: true, enumerable: false, writable: true }
+	var shared$5 = {exports: {}};
 
-	  , on, once, off, emit, methods, descriptors, base;
+	var isPure = false;
 
-	on = function (type, listener) {
-		var data;
+	var store$2 = sharedStore;
 
-		validCallable(listener);
+	(shared$5.exports = function (key, value) {
+	  return store$2[key] || (store$2[key] = value !== undefined ? value : {});
+	})('versions', []).push({
+	  version: '3.15.0',
+	  mode: 'global',
+	  copyright: '© 2021 Denis Pushkarev (zloirock.ru)'
+	});
 
-		if (!hasOwnProperty.call(this, '__ee__')) {
-			data = descriptor.value = create(null);
-			defineProperty(this, '__ee__', descriptor);
-			descriptor.value = null;
-		} else {
-			data = this.__ee__;
-		}
-		if (!data[type]) { data[type] = listener; }
-		else if (typeof data[type] === 'object') { data[type].push(listener); }
-		else { data[type] = [data[type], listener]; }
+	var id$2 = 0;
+	var postfix = Math.random();
 
-		return this;
+	var uid$5 = function (key) {
+	  return 'Symbol(' + String(key === undefined ? '' : key) + ')_' + (++id$2 + postfix).toString(36);
 	};
 
-	once = function (type, listener) {
-		var once, self;
+	var shared$4 = shared$5.exports;
+	var uid$4 = uid$5;
 
-		validCallable(listener);
-		self = this;
-		on.call(this, type, once = function () {
-			off.call(self, type, once);
-			apply.call(listener, this, arguments);
-		});
+	var keys$3 = shared$4('keys');
 
-		once.__eeOnceListener__ = listener;
-		return this;
+	var sharedKey$4 = function (key) {
+	  return keys$3[key] || (keys$3[key] = uid$4(key));
 	};
 
-	off = function (type, listener) {
-		var data, listeners, candidate, i;
-
-		validCallable(listener);
-
-		if (!hasOwnProperty.call(this, '__ee__')) { return this; }
-		data = this.__ee__;
-		if (!data[type]) { return this; }
-		listeners = data[type];
-
-		if (typeof listeners === 'object') {
-			for (i = 0; (candidate = listeners[i]); ++i) {
-				if ((candidate === listener) ||
-						(candidate.__eeOnceListener__ === listener)) {
-					if (listeners.length === 2) { data[type] = listeners[i ? 0 : 1]; }
-					else { listeners.splice(i, 1); }
-				}
-			}
-		} else {
-			if ((listeners === listener) ||
-					(listeners.__eeOnceListener__ === listener)) {
-				delete data[type];
-			}
-		}
-
-		return this;
-	};
+	var hiddenKeys$6 = {};
 
-	emit = function (type) {
-		var arguments$1 = arguments;
-
-		var i, l, listener, listeners, args;
-
-		if (!hasOwnProperty.call(this, '__ee__')) { return; }
-		listeners = this.__ee__[type];
-		if (!listeners) { return; }
-
-		if (typeof listeners === 'object') {
-			l = arguments.length;
-			args = new Array(l - 1);
-			for (i = 1; i < l; ++i) { args[i - 1] = arguments$1[i]; }
-
-			listeners = listeners.slice();
-			for (i = 0; (listener = listeners[i]); ++i) {
-				apply.call(listener, this, args);
-			}
-		} else {
-			switch (arguments.length) {
-			case 1:
-				call.call(listeners, this);
-				break;
-			case 2:
-				call.call(listeners, this, arguments[1]);
-				break;
-			case 3:
-				call.call(listeners, this, arguments[1], arguments[2]);
-				break;
-			default:
-				l = arguments.length;
-				args = new Array(l - 1);
-				for (i = 1; i < l; ++i) {
-					args[i - 1] = arguments$1[i];
-				}
-				apply.call(listeners, this, args);
-			}
-		}
-	};
+	var NATIVE_WEAK_MAP = nativeWeakMap;
+	var global$A = global$F;
+	var isObject$n = isObject$r;
+	var createNonEnumerableProperty$c = createNonEnumerableProperty$e;
+	var objectHas = has$j;
+	var shared$3 = sharedStore;
+	var sharedKey$3 = sharedKey$4;
+	var hiddenKeys$5 = hiddenKeys$6;
 
-	methods = {
-		on: on,
-		once: once,
-		off: off,
-		emit: emit
-	};
+	var OBJECT_ALREADY_INITIALIZED = 'Object already initialized';
+	var WeakMap = global$A.WeakMap;
+	var set$4, get$5, has$h;
 
-	descriptors = {
-		on: d_1(on),
-		once: d_1(once),
-		off: d_1(off),
-		emit: d_1(emit)
+	var enforce = function (it) {
+	  return has$h(it) ? get$5(it) : set$4(it, {});
 	};
 
-	base = defineProperties({}, descriptors);
-
-	module.exports = exports = function (o) {
-		return (o == null) ? create(base) : defineProperties(Object(o), descriptors);
+	var getterFor = function (TYPE) {
+	  return function (it) {
+	    var state;
+	    if (!isObject$n(it) || (state = get$5(it)).type !== TYPE) {
+	      throw TypeError('Incompatible receiver, ' + TYPE + ' required');
+	    } return state;
+	  };
 	};
-	exports.methods = methods;
+
+	if (NATIVE_WEAK_MAP || shared$3.state) {
+	  var store$1 = shared$3.state || (shared$3.state = new WeakMap());
+	  var wmget = store$1.get;
+	  var wmhas = store$1.has;
+	  var wmset = store$1.set;
+	  set$4 = function (it, metadata) {
+	    if (wmhas.call(store$1, it)) throw new TypeError(OBJECT_ALREADY_INITIALIZED);
+	    metadata.facade = it;
+	    wmset.call(store$1, it, metadata);
+	    return metadata;
+	  };
+	  get$5 = function (it) {
+	    return wmget.call(store$1, it) || {};
+	  };
+	  has$h = function (it) {
+	    return wmhas.call(store$1, it);
+	  };
+	} else {
+	  var STATE = sharedKey$3('state');
+	  hiddenKeys$5[STATE] = true;
+	  set$4 = function (it, metadata) {
+	    if (objectHas(it, STATE)) throw new TypeError(OBJECT_ALREADY_INITIALIZED);
+	    metadata.facade = it;
+	    createNonEnumerableProperty$c(it, STATE, metadata);
+	    return metadata;
+	  };
+	  get$5 = function (it) {
+	    return objectHas(it, STATE) ? it[STATE] : {};
+	  };
+	  has$h = function (it) {
+	    return objectHas(it, STATE);
+	  };
+	}
+
+	var internalState = {
+	  set: set$4,
+	  get: get$5,
+	  has: has$h,
+	  enforce: enforce,
+	  getterFor: getterFor
+	};
+
+	var global$z = global$F;
+	var createNonEnumerableProperty$b = createNonEnumerableProperty$e;
+	var has$g = has$j;
+	var setGlobal$1 = setGlobal$3;
+	var inspectSource$1 = inspectSource$3;
+	var InternalStateModule$9 = internalState;
+
+	var getInternalState$7 = InternalStateModule$9.get;
+	var enforceInternalState$1 = InternalStateModule$9.enforce;
+	var TEMPLATE = String(String).split('String');
+
+	(redefine$g.exports = function (O, key, value, options) {
+	  var unsafe = options ? !!options.unsafe : false;
+	  var simple = options ? !!options.enumerable : false;
+	  var noTargetGet = options ? !!options.noTargetGet : false;
+	  var state;
+	  if (typeof value == 'function') {
+	    if (typeof key == 'string' && !has$g(value, 'name')) {
+	      createNonEnumerableProperty$b(value, 'name', key);
+	    }
+	    state = enforceInternalState$1(value);
+	    if (!state.source) {
+	      state.source = TEMPLATE.join(typeof key == 'string' ? key : '');
+	    }
+	  }
+	  if (O === global$z) {
+	    if (simple) O[key] = value;
+	    else setGlobal$1(key, value);
+	    return;
+	  } else if (!unsafe) {
+	    delete O[key];
+	  } else if (!noTargetGet && O[key]) {
+	    simple = true;
+	  }
+	  if (simple) O[key] = value;
+	  else createNonEnumerableProperty$b(O, key, value);
+	// add fake Function#toString for correct work wrapped methods / constructors with methods like LoDash isNative
+	})(Function.prototype, 'toString', function toString() {
+	  return typeof this == 'function' && getInternalState$7(this).source || inspectSource$1(this);
 	});
 
-	var validTypes = { object: true, symbol: true };
+	var global$y = global$F;
 
-	var isImplemented$7 = function () {
-		var symbol;
-		if (typeof Symbol !== 'function') { return false; }
-		symbol = Symbol('test symbol');
-		try { String(symbol); } catch (e) { return false; }
+	var path$2 = global$y;
 
-		// Return 'true' also for polyfills
-		if (!validTypes[typeof Symbol.iterator]) { return false; }
-		if (!validTypes[typeof Symbol.toPrimitive]) { return false; }
-		if (!validTypes[typeof Symbol.toStringTag]) { return false; }
+	var path$1 = path$2;
+	var global$x = global$F;
 
-		return true;
+	var aFunction$a = function (variable) {
+	  return typeof variable == 'function' ? variable : undefined;
 	};
 
-	var isSymbol = function (x) {
-		if (!x) { return false; }
-		if (typeof x === 'symbol') { return true; }
-		if (!x.constructor) { return false; }
-		if (x.constructor.name !== 'Symbol') { return false; }
-		return (x[x.constructor.toStringTag] === 'Symbol');
+	var getBuiltIn$9 = function (namespace, method) {
+	  return arguments.length < 2 ? aFunction$a(path$1[namespace]) || aFunction$a(global$x[namespace])
+	    : path$1[namespace] && path$1[namespace][method] || global$x[namespace] && global$x[namespace][method];
 	};
 
-	var validateSymbol = function (value) {
-		if (!isSymbol(value)) { throw new TypeError(value + " is not a symbol"); }
-		return value;
-	};
+	var objectGetOwnPropertyNames = {};
 
-	var create$3 = Object.create, defineProperties = Object.defineProperties
-	  , defineProperty$1 = Object.defineProperty, objPrototype = Object.prototype
-	  , NativeSymbol, SymbolPolyfill, HiddenSymbol, globalSymbols = create$3(null)
-	  , isNativeSafe;
-
-	if (typeof Symbol === 'function') {
-		NativeSymbol = Symbol;
-		try {
-			String(NativeSymbol());
-			isNativeSafe = true;
-		} catch (ignore) {}
-	}
-
-	var generateName = (function () {
-		var created = create$3(null);
-		return function (desc) {
-			var postfix = 0, name, ie11BugWorkaround;
-			while (created[desc + (postfix || '')]) { ++postfix; }
-			desc += (postfix || '');
-			created[desc] = true;
-			name = '@@' + desc;
-			defineProperty$1(objPrototype, name, d_1.gs(null, function (value) {
-				// For IE11 issue see:
-				// https://connect.microsoft.com/IE/feedbackdetail/view/1928508/
-				//    ie11-broken-getters-on-dom-objects
-				// https://github.com/medikoo/es6-symbol/issues/12
-				if (ie11BugWorkaround) { return; }
-				ie11BugWorkaround = true;
-				defineProperty$1(this, name, d_1(value));
-				ie11BugWorkaround = false;
-			}));
-			return name;
-		};
-	}());
-
-	// Internal constructor (not one exposed) for creating Symbol instances.
-	// This one is used to ensure that `someSymbol instanceof Symbol` always return false
-	HiddenSymbol = function Symbol(description) {
-		if (this instanceof HiddenSymbol) { throw new TypeError('Symbol is not a constructor'); }
-		return SymbolPolyfill(description);
-	};
+	var ceil$1 = Math.ceil;
+	var floor$7 = Math.floor;
 
-	// Exposed `Symbol` constructor
-	// (returns instances of HiddenSymbol)
-	var polyfill = SymbolPolyfill = function Symbol(description) {
-		var symbol;
-		if (this instanceof Symbol) { throw new TypeError('Symbol is not a constructor'); }
-		if (isNativeSafe) { return NativeSymbol(description); }
-		symbol = create$3(HiddenSymbol.prototype);
-		description = (description === undefined ? '' : String(description));
-		return defineProperties(symbol, {
-			__description__: d_1('', description),
-			__name__: d_1('', generateName(description))
-		});
+	// `ToInteger` abstract operation
+	// https://tc39.es/ecma262/#sec-tointeger
+	var toInteger$b = function (argument) {
+	  return isNaN(argument = +argument) ? 0 : (argument > 0 ? floor$7 : ceil$1)(argument);
 	};
-	defineProperties(SymbolPolyfill, {
-		for: d_1(function (key) {
-			if (globalSymbols[key]) { return globalSymbols[key]; }
-			return (globalSymbols[key] = SymbolPolyfill(String(key)));
-		}),
-		keyFor: d_1(function (s) {
-			var key;
-			validateSymbol(s);
-			for (key in globalSymbols) { if (globalSymbols[key] === s) { return key; } }
-		}),
-
-		// To ensure proper interoperability with other native functions (e.g. Array.from)
-		// fallback to eventual native implementation of given symbol
-		hasInstance: d_1('', (NativeSymbol && NativeSymbol.hasInstance) || SymbolPolyfill('hasInstance')),
-		isConcatSpreadable: d_1('', (NativeSymbol && NativeSymbol.isConcatSpreadable) ||
-			SymbolPolyfill('isConcatSpreadable')),
-		iterator: d_1('', (NativeSymbol && NativeSymbol.iterator) || SymbolPolyfill('iterator')),
-		match: d_1('', (NativeSymbol && NativeSymbol.match) || SymbolPolyfill('match')),
-		replace: d_1('', (NativeSymbol && NativeSymbol.replace) || SymbolPolyfill('replace')),
-		search: d_1('', (NativeSymbol && NativeSymbol.search) || SymbolPolyfill('search')),
-		species: d_1('', (NativeSymbol && NativeSymbol.species) || SymbolPolyfill('species')),
-		split: d_1('', (NativeSymbol && NativeSymbol.split) || SymbolPolyfill('split')),
-		toPrimitive: d_1('', (NativeSymbol && NativeSymbol.toPrimitive) || SymbolPolyfill('toPrimitive')),
-		toStringTag: d_1('', (NativeSymbol && NativeSymbol.toStringTag) || SymbolPolyfill('toStringTag')),
-		unscopables: d_1('', (NativeSymbol && NativeSymbol.unscopables) || SymbolPolyfill('unscopables'))
-	});
-
-	// Internal tweaks for real symbol producer
-	defineProperties(HiddenSymbol.prototype, {
-		constructor: d_1(SymbolPolyfill),
-		toString: d_1('', function () { return this.__name__; })
-	});
-
-	// Proper implementation of methods exposed on Symbol.prototype
-	// They won't be accessible on produced symbol instances as they derive from HiddenSymbol.prototype
-	defineProperties(SymbolPolyfill.prototype, {
-		toString: d_1(function () { return 'Symbol (' + validateSymbol(this).__description__ + ')'; }),
-		valueOf: d_1(function () { return validateSymbol(this); })
-	});
-	defineProperty$1(SymbolPolyfill.prototype, SymbolPolyfill.toPrimitive, d_1('', function () {
-		var symbol = validateSymbol(this);
-		if (typeof symbol === 'symbol') { return symbol; }
-		return symbol.toString();
-	}));
-	defineProperty$1(SymbolPolyfill.prototype, SymbolPolyfill.toStringTag, d_1('c', 'Symbol'));
-
-	// Proper implementaton of toPrimitive and toStringTag for returned symbol instances
-	defineProperty$1(HiddenSymbol.prototype, SymbolPolyfill.toStringTag,
-		d_1('c', SymbolPolyfill.prototype[SymbolPolyfill.toStringTag]));
-
-	// Note: It's important to define `toPrimitive` as last one, as some implementations
-	// implement `toPrimitive` natively without implementing `toStringTag` (or other specified symbols)
-	// And that may invoke error in definition flow:
-	// See: https://github.com/medikoo/es6-symbol/issues/13#issuecomment-164146149
-	defineProperty$1(HiddenSymbol.prototype, SymbolPolyfill.toPrimitive,
-		d_1('c', SymbolPolyfill.prototype[SymbolPolyfill.toPrimitive]));
 
-	var es6Symbol = isImplemented$7() ? Symbol : polyfill;
+	var toInteger$a = toInteger$b;
 
-	var objToString = Object.prototype.toString
-	  , id = objToString.call((function () { return arguments; })());
+	var min$9 = Math.min;
 
-	var isArguments = function (value) { return objToString.call(value) === id; };
-
-	var objToString$1 = Object.prototype.toString, id$1 = objToString$1.call("");
-
-	var isString = function (value) {
-		return (
-			typeof value === "string" ||
-			(value &&
-				typeof value === "object" &&
-				(value instanceof String || objToString$1.call(value) === id$1)) ||
-			false
-		);
-	};
-
-	var isImplemented$8 = function () {
-		if (typeof globalThis !== "object") { return false; }
-		if (!globalThis) { return false; }
-		return globalThis.Array === Array;
+	// `ToLength` abstract operation
+	// https://tc39.es/ecma262/#sec-tolength
+	var toLength$q = function (argument) {
+	  return argument > 0 ? min$9(toInteger$a(argument), 0x1FFFFFFFFFFFFF) : 0; // 2 ** 53 - 1 == 9007199254740991
 	};
 
-	var naiveFallback = function () {
-		if (typeof self === "object" && self) { return self; }
-		if (typeof window === "object" && window) { return window; }
-		throw new Error("Unable to resolve global `this`");
-	};
-
-	var implementation = (function () {
-		if (this) { return this; }
-
-		// Unexpected strict mode (may happen if e.g. bundled into ESM module)
-
-		// Thanks @mathiasbynens -> https://mathiasbynens.be/notes/globalthis
-		// In all ES5+ engines global object inherits from Object.prototype
-		// (if you approached one that doesn't please report)
-		try {
-			Object.defineProperty(Object.prototype, "__global__", {
-				get: function () { return this; },
-				configurable: true
-			});
-		} catch (error) {
-			// Unfortunate case of Object.prototype being sealed (via preventExtensions, seal or freeze)
-			return naiveFallback();
-		}
-		try {
-			// Safari case (window.__global__ is resolved with global context, but __global__ does not)
-			if (!__global__) { return naiveFallback(); }
-			return __global__;
-		} finally {
-			delete Object.prototype.__global__;
-		}
-	})();
-
-	var globalThis_1 = isImplemented$8() ? globalThis : implementation;
+	var toInteger$9 = toInteger$b;
 
-	var validTypes$1 = { object: true, symbol: true };
+	var max$4 = Math.max;
+	var min$8 = Math.min;
 
-	var isImplemented$9 = function () {
-		var Symbol = globalThis_1.Symbol;
-		var symbol;
-		if (typeof Symbol !== "function") { return false; }
-		symbol = Symbol("test symbol");
-		try { String(symbol); }
-		catch (e) { return false; }
-
-		// Return 'true' also for polyfills
-		if (!validTypes$1[typeof Symbol.iterator]) { return false; }
-		if (!validTypes$1[typeof Symbol.toPrimitive]) { return false; }
-		if (!validTypes$1[typeof Symbol.toStringTag]) { return false; }
-
-		return true;
+	// Helper for a popular repeating case of the spec:
+	// Let integer be ? ToInteger(index).
+	// If integer < 0, let result be max((length + integer), 0); else let result be min(integer, length).
+	var toAbsoluteIndex$8 = function (index, length) {
+	  var integer = toInteger$9(index);
+	  return integer < 0 ? max$4(integer + length, 0) : min$8(integer, length);
 	};
 
-	var isSymbol$1 = function (value) {
-		if (!value) { return false; }
-		if (typeof value === "symbol") { return true; }
-		if (!value.constructor) { return false; }
-		if (value.constructor.name !== "Symbol") { return false; }
-		return value[value.constructor.toStringTag] === "Symbol";
-	};
+	var toIndexedObject$9 = toIndexedObject$b;
+	var toLength$p = toLength$q;
+	var toAbsoluteIndex$7 = toAbsoluteIndex$8;
 
-	var validateSymbol$1 = function (value) {
-		if (!isSymbol$1(value)) { throw new TypeError(value + " is not a symbol"); }
-		return value;
+	// `Array.prototype.{ indexOf, includes }` methods implementation
+	var createMethod$6 = function (IS_INCLUDES) {
+	  return function ($this, el, fromIndex) {
+	    var O = toIndexedObject$9($this);
+	    var length = toLength$p(O.length);
+	    var index = toAbsoluteIndex$7(fromIndex, length);
+	    var value;
+	    // Array#includes uses SameValueZero equality algorithm
+	    // eslint-disable-next-line no-self-compare -- NaN check
+	    if (IS_INCLUDES && el != el) while (length > index) {
+	      value = O[index++];
+	      // eslint-disable-next-line no-self-compare -- NaN check
+	      if (value != value) return true;
+	    // Array#indexOf ignores holes, Array#includes - not
+	    } else for (;length > index; index++) {
+	      if ((IS_INCLUDES || index in O) && O[index] === el) return IS_INCLUDES || index || 0;
+	    } return !IS_INCLUDES && -1;
+	  };
 	};
 
-	var create$4 = Object.create, defineProperty$2 = Object.defineProperty, objPrototype$1 = Object.prototype;
-
-	var created = create$4(null);
-	var generateName$1 = function (desc) {
-		var postfix = 0, name, ie11BugWorkaround;
-		while (created[desc + (postfix || "")]) { ++postfix; }
-		desc += postfix || "";
-		created[desc] = true;
-		name = "@@" + desc;
-		defineProperty$2(
-			objPrototype$1,
-			name,
-			d_1.gs(null, function (value) {
-				// For IE11 issue see:
-				// https://connect.microsoft.com/IE/feedbackdetail/view/1928508/
-				//    ie11-broken-getters-on-dom-objects
-				// https://github.com/medikoo/es6-symbol/issues/12
-				if (ie11BugWorkaround) { return; }
-				ie11BugWorkaround = true;
-				defineProperty$2(this, name, d_1(value));
-				ie11BugWorkaround = false;
-			})
-		);
-		return name;
+	var arrayIncludes = {
+	  // `Array.prototype.includes` method
+	  // https://tc39.es/ecma262/#sec-array.prototype.includes
+	  includes: createMethod$6(true),
+	  // `Array.prototype.indexOf` method
+	  // https://tc39.es/ecma262/#sec-array.prototype.indexof
+	  indexOf: createMethod$6(false)
 	};
 
-	var NativeSymbol$1 = globalThis_1.Symbol;
-
-	var standardSymbols = function (SymbolPolyfill) {
-		return Object.defineProperties(SymbolPolyfill, {
-			// To ensure proper interoperability with other native functions (e.g. Array.from)
-			// fallback to eventual native implementation of given symbol
-			hasInstance: d_1(
-				"", (NativeSymbol$1 && NativeSymbol$1.hasInstance) || SymbolPolyfill("hasInstance")
-			),
-			isConcatSpreadable: d_1(
-				"",
-				(NativeSymbol$1 && NativeSymbol$1.isConcatSpreadable) ||
-					SymbolPolyfill("isConcatSpreadable")
-			),
-			iterator: d_1("", (NativeSymbol$1 && NativeSymbol$1.iterator) || SymbolPolyfill("iterator")),
-			match: d_1("", (NativeSymbol$1 && NativeSymbol$1.match) || SymbolPolyfill("match")),
-			replace: d_1("", (NativeSymbol$1 && NativeSymbol$1.replace) || SymbolPolyfill("replace")),
-			search: d_1("", (NativeSymbol$1 && NativeSymbol$1.search) || SymbolPolyfill("search")),
-			species: d_1("", (NativeSymbol$1 && NativeSymbol$1.species) || SymbolPolyfill("species")),
-			split: d_1("", (NativeSymbol$1 && NativeSymbol$1.split) || SymbolPolyfill("split")),
-			toPrimitive: d_1(
-				"", (NativeSymbol$1 && NativeSymbol$1.toPrimitive) || SymbolPolyfill("toPrimitive")
-			),
-			toStringTag: d_1(
-				"", (NativeSymbol$1 && NativeSymbol$1.toStringTag) || SymbolPolyfill("toStringTag")
-			),
-			unscopables: d_1(
-				"", (NativeSymbol$1 && NativeSymbol$1.unscopables) || SymbolPolyfill("unscopables")
-			)
-		});
-	};
+	var has$f = has$j;
+	var toIndexedObject$8 = toIndexedObject$b;
+	var indexOf = arrayIncludes.indexOf;
+	var hiddenKeys$4 = hiddenKeys$6;
 
-	var registry = Object.create(null);
-
-	var symbolRegistry = function (SymbolPolyfill) {
-		return Object.defineProperties(SymbolPolyfill, {
-			for: d_1(function (key) {
-				if (registry[key]) { return registry[key]; }
-				return (registry[key] = SymbolPolyfill(String(key)));
-			}),
-			keyFor: d_1(function (symbol) {
-				var key;
-				validateSymbol$1(symbol);
-				for (key in registry) {
-					if (registry[key] === symbol) { return key; }
-				}
-				return undefined;
-			})
-		});
+	var objectKeysInternal = function (object, names) {
+	  var O = toIndexedObject$8(object);
+	  var i = 0;
+	  var result = [];
+	  var key;
+	  for (key in O) !has$f(hiddenKeys$4, key) && has$f(O, key) && result.push(key);
+	  // Don't enum bug & hidden keys
+	  while (names.length > i) if (has$f(O, key = names[i++])) {
+	    ~indexOf(result, key) || result.push(key);
+	  }
+	  return result;
 	};
 
-	var NativeSymbol$2         = globalThis_1.Symbol;
-
-	var create$5 = Object.create
-	  , defineProperties$1 = Object.defineProperties
-	  , defineProperty$3 = Object.defineProperty;
-
-	var SymbolPolyfill$1, HiddenSymbol$1, isNativeSafe$1;
+	// IE8- don't enum bug keys
+	var enumBugKeys$3 = [
+	  'constructor',
+	  'hasOwnProperty',
+	  'isPrototypeOf',
+	  'propertyIsEnumerable',
+	  'toLocaleString',
+	  'toString',
+	  'valueOf'
+	];
 
-	if (typeof NativeSymbol$2 === "function") {
-		try {
-			String(NativeSymbol$2());
-			isNativeSafe$1 = true;
-		} catch (ignore) {}
-	} else {
-		NativeSymbol$2 = null;
-	}
+	var internalObjectKeys$1 = objectKeysInternal;
+	var enumBugKeys$2 = enumBugKeys$3;
 
-	// Internal constructor (not one exposed) for creating Symbol instances.
-	// This one is used to ensure that `someSymbol instanceof Symbol` always return false
-	HiddenSymbol$1 = function Symbol(description) {
-		if (this instanceof HiddenSymbol$1) { throw new TypeError("Symbol is not a constructor"); }
-		return SymbolPolyfill$1(description);
-	};
+	var hiddenKeys$3 = enumBugKeys$2.concat('length', 'prototype');
 
-	// Exposed `Symbol` constructor
-	// (returns instances of HiddenSymbol)
-	var polyfill$1 = SymbolPolyfill$1 = function Symbol(description) {
-		var symbol;
-		if (this instanceof Symbol) { throw new TypeError("Symbol is not a constructor"); }
-		if (isNativeSafe$1) { return NativeSymbol$2(description); }
-		symbol = create$5(HiddenSymbol$1.prototype);
-		description = description === undefined ? "" : String(description);
-		return defineProperties$1(symbol, {
-			__description__: d_1("", description),
-			__name__: d_1("", generateName$1(description))
-		});
+	// `Object.getOwnPropertyNames` method
+	// https://tc39.es/ecma262/#sec-object.getownpropertynames
+	// eslint-disable-next-line es/no-object-getownpropertynames -- safe
+	objectGetOwnPropertyNames.f = Object.getOwnPropertyNames || function getOwnPropertyNames(O) {
+	  return internalObjectKeys$1(O, hiddenKeys$3);
 	};
 
-	standardSymbols(SymbolPolyfill$1);
-	symbolRegistry(SymbolPolyfill$1);
-
-	// Internal tweaks for real symbol producer
-	defineProperties$1(HiddenSymbol$1.prototype, {
-		constructor: d_1(SymbolPolyfill$1),
-		toString: d_1("", function () { return this.__name__; })
-	});
+	var objectGetOwnPropertySymbols = {};
 
-	// Proper implementation of methods exposed on Symbol.prototype
-	// They won't be accessible on produced symbol instances as they derive from HiddenSymbol.prototype
-	defineProperties$1(SymbolPolyfill$1.prototype, {
-		toString: d_1(function () { return "Symbol (" + validateSymbol$1(this).__description__ + ")"; }),
-		valueOf: d_1(function () { return validateSymbol$1(this); })
-	});
-	defineProperty$3(
-		SymbolPolyfill$1.prototype,
-		SymbolPolyfill$1.toPrimitive,
-		d_1("", function () {
-			var symbol = validateSymbol$1(this);
-			if (typeof symbol === "symbol") { return symbol; }
-			return symbol.toString();
-		})
-	);
-	defineProperty$3(SymbolPolyfill$1.prototype, SymbolPolyfill$1.toStringTag, d_1("c", "Symbol"));
-
-	// Proper implementaton of toPrimitive and toStringTag for returned symbol instances
-	defineProperty$3(
-		HiddenSymbol$1.prototype, SymbolPolyfill$1.toStringTag,
-		d_1("c", SymbolPolyfill$1.prototype[SymbolPolyfill$1.toStringTag])
-	);
-
-	// Note: It's important to define `toPrimitive` as last one, as some implementations
-	// implement `toPrimitive` natively without implementing `toStringTag` (or other specified symbols)
-	// And that may invoke error in definition flow:
-	// See: https://github.com/medikoo/es6-symbol/issues/13#issuecomment-164146149
-	defineProperty$3(
-		HiddenSymbol$1.prototype, SymbolPolyfill$1.toPrimitive,
-		d_1("c", SymbolPolyfill$1.prototype[SymbolPolyfill$1.toPrimitive])
-	);
-
-	var es6Symbol$1 = isImplemented$9()
-		? globalThis_1.Symbol
-		: polyfill$1;
-
-	var iteratorSymbol = es6Symbol$1.iterator
-	  , isArray        = Array.isArray;
-
-	var isIterable = function (value) {
-		if (!isValue(value)) { return false; }
-		if (isArray(value)) { return true; }
-		if (isString(value)) { return true; }
-		if (isArguments(value)) { return true; }
-		return typeof value[iteratorSymbol] === "function";
-	};
+	// eslint-disable-next-line es/no-object-getownpropertysymbols -- safe
+	objectGetOwnPropertySymbols.f = Object.getOwnPropertySymbols;
 
-	var validIterable = function (value) {
-		if (!isIterable(value)) { throw new TypeError(value + " is not iterable"); }
-		return value;
-	};
+	var getBuiltIn$8 = getBuiltIn$9;
+	var getOwnPropertyNamesModule$1 = objectGetOwnPropertyNames;
+	var getOwnPropertySymbolsModule$2 = objectGetOwnPropertySymbols;
+	var anObject$k = anObject$m;
 
-	var objectToString = Object.prototype.toString;
-
-	var coerce = function (value) {
-		if (!is(value)) { return null; }
-		if (is$1(value)) {
-			// Reject Object.prototype.toString coercion
-			var valueToString = value.toString;
-			if (typeof valueToString !== "function") { return null; }
-			if (valueToString === objectToString) { return null; }
-			// Note: It can be object coming from other realm, still as there's no ES3 and CSP compliant
-			// way to resolve its realm's Object.prototype.toString it's left as not addressed edge case
-		}
-		try {
-			return "" + value; // Ensure implicit coercion
-		} catch (error) {
-			return null;
-		}
+	// all object keys, includes non-enumerable and symbols
+	var ownKeys$1 = getBuiltIn$8('Reflect', 'ownKeys') || function ownKeys(it) {
+	  var keys = getOwnPropertyNamesModule$1.f(anObject$k(it));
+	  var getOwnPropertySymbols = getOwnPropertySymbolsModule$2.f;
+	  return getOwnPropertySymbols ? keys.concat(getOwnPropertySymbols(it)) : keys;
 	};
 
-	var safeToString = function (value) {
-		try {
-			return value.toString();
-		} catch (error) {
-			try { return String(value); }
-			catch (error2) { return null; }
-		}
-	};
+	var has$e = has$j;
+	var ownKeys = ownKeys$1;
+	var getOwnPropertyDescriptorModule$3 = objectGetOwnPropertyDescriptor;
+	var definePropertyModule$6 = objectDefineProperty;
 
-	var reNewLine = /[\n\r\u2028\u2029]/g;
-
-	var toShortString = function (value) {
-		var string = safeToString(value);
-		if (string === null) { return "<Non-coercible to string value>"; }
-		// Trim if too long
-		if (string.length > 100) { string = string.slice(0, 99) + "…"; }
-		// Replace eventual new lines
-		string = string.replace(reNewLine, function (char) {
-			switch (char) {
-				case "\n":
-					return "\\n";
-				case "\r":
-					return "\\r";
-				case "\u2028":
-					return "\\u2028";
-				case "\u2029":
-					return "\\u2029";
-				/* istanbul ignore next */
-				default:
-					throw new Error("Unexpected character");
-			}
-		});
-		return string;
+	var copyConstructorProperties$2 = function (target, source) {
+	  var keys = ownKeys(source);
+	  var defineProperty = definePropertyModule$6.f;
+	  var getOwnPropertyDescriptor = getOwnPropertyDescriptorModule$3.f;
+	  for (var i = 0; i < keys.length; i++) {
+	    var key = keys[i];
+	    if (!has$e(target, key)) defineProperty(target, key, getOwnPropertyDescriptor(source, key));
+	  }
 	};
 
-	var resolveMessage = function (message, value) {
-		return message.replace("%v", toShortString(value));
-	};
+	var fails$J = fails$N;
 
-	var resolveException = function (value, defaultMessage, inputOptions) {
-		if (!is$1(inputOptions)) { throw new TypeError(resolveMessage(defaultMessage, value)); }
-		if (!is(value)) {
-			if ("default" in inputOptions) { return inputOptions["default"]; }
-			if (inputOptions.isOptional) { return null; }
-		}
-		var errorMessage = coerce(inputOptions.errorMessage);
-		if (!is(errorMessage)) { errorMessage = defaultMessage; }
-		throw new TypeError(resolveMessage(errorMessage, value));
-	};
+	var replacement = /#|\.prototype\./;
 
-	var ensure = function (value/*, options*/) {
-		if (is(value)) { return value; }
-		return resolveException(value, "Cannot use %v", arguments[1]);
+	var isForced$5 = function (feature, detection) {
+	  var value = data[normalize$1(feature)];
+	  return value == POLYFILL ? true
+	    : value == NATIVE ? false
+	    : typeof detection == 'function' ? fails$J(detection)
+	    : !!detection;
 	};
 
-	var ensure$1 = function (value/*, options*/) {
-		if (is$4(value)) { return value; }
-		return resolveException(value, "%v is not a plain function", arguments[1]);
+	var normalize$1 = isForced$5.normalize = function (string) {
+	  return String(string).replace(replacement, '.').toLowerCase();
 	};
 
-	var isImplemented$a = function () {
-		var from = Array.from, arr, result;
-		if (typeof from !== "function") { return false; }
-		arr = ["raz", "dwa"];
-		result = from(arr);
-		return Boolean(result && result !== arr && result[1] === "dwa");
-	};
+	var data = isForced$5.data = {};
+	var NATIVE = isForced$5.NATIVE = 'N';
+	var POLYFILL = isForced$5.POLYFILL = 'P';
 
-	var objToString$2 = Object.prototype.toString
-	  , isFunctionStringTag = RegExp.prototype.test.bind(/^[object [A-Za-z0-9]*Function]$/);
+	var isForced_1 = isForced$5;
 
-	var isFunction = function (value) {
-		return typeof value === "function" && isFunctionStringTag(objToString$2.call(value));
-	};
+	var global$w = global$F;
+	var getOwnPropertyDescriptor$4 = objectGetOwnPropertyDescriptor.f;
+	var createNonEnumerableProperty$a = createNonEnumerableProperty$e;
+	var redefine$f = redefine$g.exports;
+	var setGlobal = setGlobal$3;
+	var copyConstructorProperties$1 = copyConstructorProperties$2;
+	var isForced$4 = isForced_1;
 
-	var iteratorSymbol$1 = es6Symbol$1.iterator
-	  , isArray$1        = Array.isArray
-	  , call           = Function.prototype.call
-	  , desc           = { configurable: true, enumerable: true, writable: true, value: null }
-	  , defineProperty$4 = Object.defineProperty;
-
-	// eslint-disable-next-line complexity, max-lines-per-function
-	var shim$7 = function (arrayLike/*, mapFn, thisArg*/) {
-		var mapFn = arguments[1]
-		  , thisArg = arguments[2]
-		  , Context
-		  , i
-		  , j
-		  , arr
-		  , length
-		  , code
-		  , iterator
-		  , result
-		  , getIterator
-		  , value;
-
-		arrayLike = Object(validValue(arrayLike));
-
-		if (isValue(mapFn)) { validCallable(mapFn); }
-		if (!this || this === Array || !isFunction(this)) {
-			// Result: Plain array
-			if (!mapFn) {
-				if (isArguments(arrayLike)) {
-					// Source: Arguments
-					length = arrayLike.length;
-					if (length !== 1) { return Array.apply(null, arrayLike); }
-					arr = new Array(1);
-					arr[0] = arrayLike[0];
-					return arr;
-				}
-				if (isArray$1(arrayLike)) {
-					// Source: Array
-					arr = new Array((length = arrayLike.length));
-					for (i = 0; i < length; ++i) { arr[i] = arrayLike[i]; }
-					return arr;
-				}
-			}
-			arr = [];
-		} else {
-			// Result: Non plain array
-			Context = this;
-		}
-
-		if (!isArray$1(arrayLike)) {
-			if ((getIterator = arrayLike[iteratorSymbol$1]) !== undefined) {
-				// Source: Iterator
-				iterator = validCallable(getIterator).call(arrayLike);
-				if (Context) { arr = new Context(); }
-				result = iterator.next();
-				i = 0;
-				while (!result.done) {
-					value = mapFn ? call.call(mapFn, thisArg, result.value, i) : result.value;
-					if (Context) {
-						desc.value = value;
-						defineProperty$4(arr, i, desc);
-					} else {
-						arr[i] = value;
-					}
-					result = iterator.next();
-					++i;
-				}
-				length = i;
-			} else if (isString(arrayLike)) {
-				// Source: String
-				length = arrayLike.length;
-				if (Context) { arr = new Context(); }
-				for (i = 0, j = 0; i < length; ++i) {
-					value = arrayLike[i];
-					if (i + 1 < length) {
-						code = value.charCodeAt(0);
-						// eslint-disable-next-line max-depth
-						if (code >= 0xd800 && code <= 0xdbff) { value += arrayLike[++i]; }
-					}
-					value = mapFn ? call.call(mapFn, thisArg, value, j) : value;
-					if (Context) {
-						desc.value = value;
-						defineProperty$4(arr, j, desc);
-					} else {
-						arr[j] = value;
-					}
-					++j;
-				}
-				length = j;
-			}
-		}
-		if (length === undefined) {
-			// Source: array or array-like
-			length = toPosInteger(arrayLike.length);
-			if (Context) { arr = new Context(length); }
-			for (i = 0; i < length; ++i) {
-				value = mapFn ? call.call(mapFn, thisArg, arrayLike[i], i) : arrayLike[i];
-				if (Context) {
-					desc.value = value;
-					defineProperty$4(arr, i, desc);
-				} else {
-					arr[i] = value;
-				}
-			}
-		}
-		if (Context) {
-			desc.value = null;
-			arr.length = length;
-		}
-		return arr;
+	/*
+	  options.target      - name of the target object
+	  options.global      - target is the global object
+	  options.stat        - export as static methods of target
+	  options.proto       - export as prototype methods of target
+	  options.real        - real prototype method for the `pure` version
+	  options.forced      - export even if the native feature is available
+	  options.bind        - bind methods to the target, required for the `pure` version
+	  options.wrap        - wrap constructors to preventing global pollution, required for the `pure` version
+	  options.unsafe      - use the simple assignment of property instead of delete + defineProperty
+	  options.sham        - add a flag to not completely full polyfills
+	  options.enumerable  - export as enumerable property
+	  options.noTargetGet - prevent calling a getter on target
+	*/
+	var _export = function (options, source) {
+	  var TARGET = options.target;
+	  var GLOBAL = options.global;
+	  var STATIC = options.stat;
+	  var FORCED, target, key, targetProperty, sourceProperty, descriptor;
+	  if (GLOBAL) {
+	    target = global$w;
+	  } else if (STATIC) {
+	    target = global$w[TARGET] || setGlobal(TARGET, {});
+	  } else {
+	    target = (global$w[TARGET] || {}).prototype;
+	  }
+	  if (target) for (key in source) {
+	    sourceProperty = source[key];
+	    if (options.noTargetGet) {
+	      descriptor = getOwnPropertyDescriptor$4(target, key);
+	      targetProperty = descriptor && descriptor.value;
+	    } else targetProperty = target[key];
+	    FORCED = isForced$4(GLOBAL ? key : TARGET + (STATIC ? '.' : '#') + key, options.forced);
+	    // contained in target
+	    if (!FORCED && targetProperty !== undefined) {
+	      if (typeof sourceProperty === typeof targetProperty) continue;
+	      copyConstructorProperties$1(sourceProperty, targetProperty);
+	    }
+	    // add a flag to not completely full polyfills
+	    if (options.sham || (targetProperty && targetProperty.sham)) {
+	      createNonEnumerableProperty$a(sourceProperty, 'sham', true);
+	    }
+	    // extend global
+	    redefine$f(target, key, sourceProperty, options);
+	  }
 	};
 
-	var from_1 = isImplemented$a() ? Array.from : shim$7;
-
-	var copy = function (obj/*, propertyNames, options*/) {
-		var copy = Object(validValue(obj)), propertyNames = arguments[1], options = Object(arguments[2]);
-		if (copy !== obj && !propertyNames) { return copy; }
-		var result = {};
-		if (propertyNames) {
-			from_1(propertyNames, function (propertyName) {
-				if (options.ensure || propertyName in obj) { result[propertyName] = obj[propertyName]; }
-			});
-		} else {
-			assign(result, obj);
-		}
-		return result;
-	};
+	var $$16 = _export;
 
-	var bind                    = Function.prototype.bind
-	  , call$1                    = Function.prototype.call
-	  , keys$2                    = Object.keys
-	  , objPropertyIsEnumerable = Object.prototype.propertyIsEnumerable;
-
-	var _iterate = function (method, defVal) {
-		return function (obj, cb/*, thisArg, compareFn*/) {
-			var list, thisArg = arguments[2], compareFn = arguments[3];
-			obj = Object(validValue(obj));
-			validCallable(cb);
-
-			list = keys$2(obj);
-			if (compareFn) {
-				list.sort(typeof compareFn === "function" ? bind.call(compareFn, obj) : undefined);
-			}
-			if (typeof method !== "function") { method = list[method]; }
-			return call$1.call(method, list, function (key, index) {
-				if (!objPropertyIsEnumerable.call(obj, key)) { return defVal; }
-				return call$1.call(cb, thisArg, obj[key], key, obj, index);
-			});
-		};
-	};
+	// `Date.now` method
+	// https://tc39.es/ecma262/#sec-date.now
+	$$16({ target: 'Date', stat: true }, {
+	  now: function now() {
+	    return new Date().getTime();
+	  }
+	});
 
-	var forEach$1 = _iterate("forEach");
+	var redefine$e = redefine$g.exports;
+
+	var DatePrototype$1 = Date.prototype;
+	var INVALID_DATE = 'Invalid Date';
+	var TO_STRING$1 = 'toString';
+	var nativeDateToString = DatePrototype$1[TO_STRING$1];
+	var getTime$1 = DatePrototype$1.getTime;
+
+	// `Date.prototype.toString` method
+	// https://tc39.es/ecma262/#sec-date.prototype.tostring
+	if (new Date(NaN) + '' != INVALID_DATE) {
+	  redefine$e(DatePrototype$1, TO_STRING$1, function toString() {
+	    var value = getTime$1.call(this);
+	    // eslint-disable-next-line no-self-compare -- NaN check
+	    return value === value ? nativeDateToString.call(this) : INVALID_DATE;
+	  });
+	}
 
-	var call$2     = Function.prototype.call;
+	function _typeof(obj) {
+	  "@babel/helpers - typeof";
 
-	var map$1 = function (obj, cb/*, thisArg*/) {
-		var result = {}, thisArg = arguments[2];
-		validCallable(cb);
-		forEach$1(obj, function (value, key, targetObj, index) {
-			result[key] = call$2.call(cb, thisArg, value, key, targetObj, index);
-		});
-		return result;
-	};
+	  if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
+	    _typeof = function (obj) {
+	      return typeof obj;
+	    };
+	  } else {
+	    _typeof = function (obj) {
+	      return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
+	    };
+	  }
 
-	var bind$1 = Function.prototype.bind
-	  , defineProperty$5 = Object.defineProperty
-	  , hasOwnProperty$1 = Object.prototype.hasOwnProperty
-	  , define;
-
-	define = function (name, desc, options) {
-		var value = ensure(desc) && ensure$1(desc.value), dgs;
-		dgs = copy(desc);
-		delete dgs.writable;
-		delete dgs.value;
-		dgs.get = function () {
-			if (!options.overwriteDefinition && hasOwnProperty$1.call(this, name)) { return value; }
-			desc.value = bind$1.call(value, options.resolveContext ? options.resolveContext(this) : this);
-			defineProperty$5(this, name, desc);
-			return this[name];
-		};
-		return dgs;
-	};
+	  return _typeof(obj);
+	}
 
-	var autoBind = function (props/*, options*/) {
-		var options = normalizeOptions(arguments[1]);
-		if (is(options.resolveContext)) { ensure$1(options.resolveContext); }
-		return map$1(props, function (desc, name) { return define(name, desc, options); });
-	};
+	function _classCallCheck$1(instance, Constructor) {
+	  if (!(instance instanceof Constructor)) {
+	    throw new TypeError("Cannot call a class as a function");
+	  }
+	}
 
-	var defineProperty$6 = Object.defineProperty, defineProperties$2 = Object.defineProperties, Iterator;
-
-	var es6Iterator = Iterator = function (list, context) {
-		if (!(this instanceof Iterator)) { throw new TypeError("Constructor requires 'new'"); }
-		defineProperties$2(this, {
-			__list__: d_1("w", validValue(list)),
-			__context__: d_1("w", context),
-			__nextIndex__: d_1("w", 0)
-		});
-		if (!context) { return; }
-		validCallable(context.on);
-		context.on("_add", this._onAdd);
-		context.on("_delete", this._onDelete);
-		context.on("_clear", this._onClear);
-	};
+	function _defineProperties$1(target, props) {
+	  for (var i = 0; i < props.length; i++) {
+	    var descriptor = props[i];
+	    descriptor.enumerable = descriptor.enumerable || false;
+	    descriptor.configurable = true;
+	    if ("value" in descriptor) descriptor.writable = true;
+	    Object.defineProperty(target, descriptor.key, descriptor);
+	  }
+	}
 
-	// Internal %IteratorPrototype% doesn't expose its constructor
-	delete Iterator.prototype.constructor;
-
-	defineProperties$2(
-		Iterator.prototype,
-		assign(
-			{
-				_next: d_1(function () {
-					var i;
-					if (!this.__list__) { return undefined; }
-					if (this.__redo__) {
-						i = this.__redo__.shift();
-						if (i !== undefined) { return i; }
-					}
-					if (this.__nextIndex__ < this.__list__.length) { return this.__nextIndex__++; }
-					this._unBind();
-					return undefined;
-				}),
-				next: d_1(function () {
-					return this._createResult(this._next());
-				}),
-				_createResult: d_1(function (i) {
-					if (i === undefined) { return { done: true, value: undefined }; }
-					return { done: false, value: this._resolve(i) };
-				}),
-				_resolve: d_1(function (i) {
-					return this.__list__[i];
-				}),
-				_unBind: d_1(function () {
-					this.__list__ = null;
-					delete this.__redo__;
-					if (!this.__context__) { return; }
-					this.__context__.off("_add", this._onAdd);
-					this.__context__.off("_delete", this._onDelete);
-					this.__context__.off("_clear", this._onClear);
-					this.__context__ = null;
-				}),
-				toString: d_1(function () {
-					return "[object " + (this[es6Symbol$1.toStringTag] || "Object") + "]";
-				})
-			},
-			autoBind({
-				_onAdd: d_1(function (index) {
-					if (index >= this.__nextIndex__) { return; }
-					++this.__nextIndex__;
-					if (!this.__redo__) {
-						defineProperty$6(this, "__redo__", d_1("c", [index]));
-						return;
-					}
-					this.__redo__.forEach(function (redo, i) {
-						if (redo >= index) { this.__redo__[i] = ++redo; }
-					}, this);
-					this.__redo__.push(index);
-				}),
-				_onDelete: d_1(function (index) {
-					var i;
-					if (index >= this.__nextIndex__) { return; }
-					--this.__nextIndex__;
-					if (!this.__redo__) { return; }
-					i = this.__redo__.indexOf(index);
-					if (i !== -1) { this.__redo__.splice(i, 1); }
-					this.__redo__.forEach(function (redo, j) {
-						if (redo > index) { this.__redo__[j] = --redo; }
-					}, this);
-				}),
-				_onClear: d_1(function () {
-					if (this.__redo__) { clear.call(this.__redo__); }
-					this.__nextIndex__ = 0;
-				})
-			})
-		)
-	);
-
-	defineProperty$6(
-		Iterator.prototype,
-		es6Symbol$1.iterator,
-		d_1(function () {
-			return this;
-		})
-	);
-
-	var array = createCommonjsModule(function (module) {
-
-
-
-	var defineProperty = Object.defineProperty, ArrayIterator;
-
-	ArrayIterator = module.exports = function (arr, kind) {
-		if (!(this instanceof ArrayIterator)) { throw new TypeError("Constructor requires 'new'"); }
-		es6Iterator.call(this, arr);
-		if (!kind) { kind = "value"; }
-		else if (contains.call(kind, "key+value")) { kind = "key+value"; }
-		else if (contains.call(kind, "key")) { kind = "key"; }
-		else { kind = "value"; }
-		defineProperty(this, "__kind__", d_1("", kind));
-	};
-	if (setPrototypeOf) { setPrototypeOf(ArrayIterator, es6Iterator); }
+	function _createClass$1(Constructor, protoProps, staticProps) {
+	  if (protoProps) _defineProperties$1(Constructor.prototype, protoProps);
+	  if (staticProps) _defineProperties$1(Constructor, staticProps);
+	  return Constructor;
+	}
 
-	// Internal %ArrayIteratorPrototype% doesn't expose its constructor
-	delete ArrayIterator.prototype.constructor;
+	function _defineProperty(obj, key, value) {
+	  if (key in obj) {
+	    Object.defineProperty(obj, key, {
+	      value: value,
+	      enumerable: true,
+	      configurable: true,
+	      writable: true
+	    });
+	  } else {
+	    obj[key] = value;
+	  }
 
-	ArrayIterator.prototype = Object.create(es6Iterator.prototype, {
-		_resolve: d_1(function (i) {
-			if (this.__kind__ === "value") { return this.__list__[i]; }
-			if (this.__kind__ === "key+value") { return [i, this.__list__[i]]; }
-			return i;
-		})
-	});
-	defineProperty(ArrayIterator.prototype, es6Symbol$1.toStringTag, d_1("c", "Array Iterator"));
-	});
+	  return obj;
+	}
 
-	var string = createCommonjsModule(function (module) {
+	function _slicedToArray(arr, i) {
+	  return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest();
+	}
 
+	function _toConsumableArray(arr) {
+	  return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread();
+	}
 
+	function _arrayWithoutHoles(arr) {
+	  if (Array.isArray(arr)) return _arrayLikeToArray(arr);
+	}
 
-	var defineProperty = Object.defineProperty, StringIterator;
+	function _arrayWithHoles(arr) {
+	  if (Array.isArray(arr)) return arr;
+	}
 
-	StringIterator = module.exports = function (str) {
-		if (!(this instanceof StringIterator)) { throw new TypeError("Constructor requires 'new'"); }
-		str = String(str);
-		es6Iterator.call(this, str);
-		defineProperty(this, "__length__", d_1("", str.length));
-	};
-	if (setPrototypeOf) { setPrototypeOf(StringIterator, es6Iterator); }
-
-	// Internal %ArrayIteratorPrototype% doesn't expose its constructor
-	delete StringIterator.prototype.constructor;
-
-	StringIterator.prototype = Object.create(es6Iterator.prototype, {
-		_next: d_1(function () {
-			if (!this.__list__) { return undefined; }
-			if (this.__nextIndex__ < this.__length__) { return this.__nextIndex__++; }
-			this._unBind();
-			return undefined;
-		}),
-		_resolve: d_1(function (i) {
-			var char = this.__list__[i], code;
-			if (this.__nextIndex__ === this.__length__) { return char; }
-			code = char.charCodeAt(0);
-			if (code >= 0xd800 && code <= 0xdbff) { return char + this.__list__[this.__nextIndex__++]; }
-			return char;
-		})
-	});
-	defineProperty(StringIterator.prototype, es6Symbol$1.toStringTag, d_1("c", "String Iterator"));
-	});
+	function _iterableToArray(iter) {
+	  if (typeof Symbol !== "undefined" && iter[Symbol.iterator] != null || iter["@@iterator"] != null) return Array.from(iter);
+	}
 
-	var iteratorSymbol$2 = es6Symbol$1.iterator;
+	function _iterableToArrayLimit(arr, i) {
+	  var _i = arr == null ? null : typeof Symbol !== "undefined" && arr[Symbol.iterator] || arr["@@iterator"];
 
-	var get = function (obj) {
-		if (typeof validIterable(obj)[iteratorSymbol$2] === "function") { return obj[iteratorSymbol$2](); }
-		if (isArguments(obj)) { return new array(obj); }
-		if (isString(obj)) { return new string(obj); }
-		return new array(obj);
-	};
+	  if (_i == null) return;
+	  var _arr = [];
+	  var _n = true;
+	  var _d = false;
 
-	var isArray$2 = Array.isArray, call$3 = Function.prototype.call, some = Array.prototype.some;
-
-	var forOf = function (iterable, cb /*, thisArg*/) {
-		var mode, thisArg = arguments[2], result, doBreak, broken, i, length, char, code;
-		if (isArray$2(iterable) || isArguments(iterable)) { mode = "array"; }
-		else if (isString(iterable)) { mode = "string"; }
-		else { iterable = get(iterable); }
-
-		validCallable(cb);
-		doBreak = function () {
-			broken = true;
-		};
-		if (mode === "array") {
-			some.call(iterable, function (value) {
-				call$3.call(cb, thisArg, value, doBreak);
-				return broken;
-			});
-			return;
-		}
-		if (mode === "string") {
-			length = iterable.length;
-			for (i = 0; i < length; ++i) {
-				char = iterable[i];
-				if (i + 1 < length) {
-					code = char.charCodeAt(0);
-					if (code >= 0xd800 && code <= 0xdbff) { char += iterable[++i]; }
-				}
-				call$3.call(cb, thisArg, char, doBreak);
-				if (broken) { break; }
-			}
-			return;
-		}
-		result = iterable.next();
-
-		while (!result.done) {
-			call$3.call(cb, thisArg, result.value, doBreak);
-			if (broken) { return; }
-			result = iterable.next();
-		}
-	};
+	  var _s, _e;
 
-	var iterator = createCommonjsModule(function (module) {
+	  try {
+	    for (_i = _i.call(arr); !(_n = (_s = _i.next()).done); _n = true) {
+	      _arr.push(_s.value);
 
-	var toStringTagSymbol = es6Symbol.toStringTag
+	      if (i && _arr.length === i) break;
+	    }
+	  } catch (err) {
+	    _d = true;
+	    _e = err;
+	  } finally {
+	    try {
+	      if (!_n && _i["return"] != null) _i["return"]();
+	    } finally {
+	      if (_d) throw _e;
+	    }
+	  }
 
-	  , defineProperty = Object.defineProperty
-	  , SetIterator;
+	  return _arr;
+	}
 
-	SetIterator = module.exports = function (set, kind) {
-		if (!(this instanceof SetIterator)) { return new SetIterator(set, kind); }
-		es6Iterator.call(this, set.__setData__, set);
-		if (!kind) { kind = 'value'; }
-		else if (contains.call(kind, 'key+value')) { kind = 'key+value'; }
-		else { kind = 'value'; }
-		defineProperty(this, '__kind__', d_1('', kind));
-	};
-	if (setPrototypeOf) { setPrototypeOf(SetIterator, es6Iterator); }
-
-	SetIterator.prototype = Object.create(es6Iterator.prototype, {
-		constructor: d_1(SetIterator),
-		_resolve: d_1(function (i) {
-			if (this.__kind__ === 'value') { return this.__list__[i]; }
-			return [this.__list__[i], this.__list__[i]];
-		}),
-		toString: d_1(function () { return '[object Set Iterator]'; })
-	});
-	defineProperty(SetIterator.prototype, toStringTagSymbol, d_1('c', 'Set Iterator'));
-	});
+	function _unsupportedIterableToArray(o, minLen) {
+	  if (!o) return;
+	  if (typeof o === "string") return _arrayLikeToArray(o, minLen);
+	  var n = Object.prototype.toString.call(o).slice(8, -1);
+	  if (n === "Object" && o.constructor) n = o.constructor.name;
+	  if (n === "Map" || n === "Set") return Array.from(o);
+	  if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);
+	}
 
-	// Exports true if environment provides native `Set` implementation,
-
-	var isNativeImplemented = (function () {
-		if (typeof Set === 'undefined') { return false; }
-		return (Object.prototype.toString.call(Set.prototype) === '[object Set]');
-	}());
-
-	var iterator$1       = validIterable
-
-	  , call$4 = Function.prototype.call
-	  , defineProperty$7 = Object.defineProperty, getPrototypeOf$1 = Object.getPrototypeOf
-	  , SetPoly, getValues, NativeSet;
-
-	if (isNativeImplemented) { NativeSet = Set; }
-
-	var polyfill$2 = SetPoly = function Set(/*iterable*/) {
-		var iterable = arguments[0], self;
-		if (!(this instanceof SetPoly)) { throw new TypeError('Constructor requires \'new\''); }
-		if (isNativeImplemented && setPrototypeOf) { self = setPrototypeOf(new NativeSet(), getPrototypeOf$1(this)); }
-		else { self = this; }
-		if (iterable != null) { iterator$1(iterable); }
-		defineProperty$7(self, '__setData__', d_1('c', []));
-		if (!iterable) { return self; }
-		forOf(iterable, function (value) {
-			if (eIndexOf.call(this, value) !== -1) { return; }
-			this.push(value);
-		}, self.__setData__);
-		return self;
-	};
+	function _arrayLikeToArray(arr, len) {
+	  if (len == null || len > arr.length) len = arr.length;
 
-	if (isNativeImplemented) {
-		if (setPrototypeOf) { setPrototypeOf(SetPoly, NativeSet); }
-		SetPoly.prototype = Object.create(NativeSet.prototype, { constructor: d_1(SetPoly) });
-	}
-
-	eventEmitter(Object.defineProperties(SetPoly.prototype, {
-		add: d_1(function (value) {
-			if (this.has(value)) { return this; }
-			this.emit('_add', this.__setData__.push(value) - 1, value);
-			return this;
-		}),
-		clear: d_1(function () {
-			if (!this.__setData__.length) { return; }
-			clear.call(this.__setData__);
-			this.emit('_clear');
-		}),
-		delete: d_1(function (value) {
-			var index = eIndexOf.call(this.__setData__, value);
-			if (index === -1) { return false; }
-			this.__setData__.splice(index, 1);
-			this.emit('_delete', index, value);
-			return true;
-		}),
-		entries: d_1(function () { return new iterator(this, 'key+value'); }),
-		forEach: d_1(function (cb/*, thisArg*/) {
-			var thisArg = arguments[1], iterator, result, value;
-			validCallable(cb);
-			iterator = this.values();
-			result = iterator._next();
-			while (result !== undefined) {
-				value = iterator._resolve(result);
-				call$4.call(cb, thisArg, value, value, this);
-				result = iterator._next();
-			}
-		}),
-		has: d_1(function (value) {
-			return (eIndexOf.call(this.__setData__, value) !== -1);
-		}),
-		keys: d_1(getValues = function () { return this.values(); }),
-		size: d_1.gs(function () { return this.__setData__.length; }),
-		values: d_1(function () { return new iterator(this); }),
-		toString: d_1(function () { return '[object Set]'; })
-	}));
-	defineProperty$7(SetPoly.prototype, es6Symbol.iterator, d_1(getValues));
-	defineProperty$7(SetPoly.prototype, es6Symbol.toStringTag, d_1('c', 'Set'));
-
-	var es6Set = isImplemented() ? Set : polyfill$2;
-
-	var isImplemented$b = function () {
-		var map, iterator, result;
-		if (typeof Map !== 'function') { return false; }
-		try {
-			// WebKit doesn't support arguments and crashes
-			map = new Map([['raz', 'one'], ['dwa', 'two'], ['trzy', 'three']]);
-		} catch (e) {
-			return false;
-		}
-		if (String(map) !== '[object Map]') { return false; }
-		if (map.size !== 3) { return false; }
-		if (typeof map.clear !== 'function') { return false; }
-		if (typeof map.delete !== 'function') { return false; }
-		if (typeof map.entries !== 'function') { return false; }
-		if (typeof map.forEach !== 'function') { return false; }
-		if (typeof map.get !== 'function') { return false; }
-		if (typeof map.has !== 'function') { return false; }
-		if (typeof map.keys !== 'function') { return false; }
-		if (typeof map.set !== 'function') { return false; }
-		if (typeof map.values !== 'function') { return false; }
-
-		iterator = map.entries();
-		result = iterator.next();
-		if (result.done !== false) { return false; }
-		if (!result.value) { return false; }
-		if (result.value[0] !== 'raz') { return false; }
-		if (result.value[1] !== 'one') { return false; }
-
-		return true;
-	};
+	  for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];
 
-	var forEach$2 = Array.prototype.forEach, create$6 = Object.create;
+	  return arr2;
+	}
 
-	// eslint-disable-next-line no-unused-vars
-	var primitiveSet = function (arg/*, …args*/) {
-		var set = create$6(null);
-		forEach$2.call(arguments, function (name) { set[name] = true; });
-		return set;
-	};
+	function _nonIterableSpread() {
+	  throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+	}
 
-	var iteratorKinds = primitiveSet('key',
-		'value', 'key+value');
+	function _nonIterableRest() {
+	  throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+	}
 
-	var iterator$2 = createCommonjsModule(function (module) {
+	function _createForOfIteratorHelper(o, allowArrayLike) {
+	  var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"];
 
-	var toStringTagSymbol = es6Symbol$1.toStringTag
+	  if (!it) {
+	    if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") {
+	      if (it) o = it;
+	      var i = 0;
 
-	  , defineProperties = Object.defineProperties
-	  , unBind = es6Iterator.prototype._unBind
-	  , MapIterator;
+	      var F = function () {};
 
-	MapIterator = module.exports = function (map, kind) {
-		if (!(this instanceof MapIterator)) { return new MapIterator(map, kind); }
-		es6Iterator.call(this, map.__mapKeysData__, map);
-		if (!kind || !iteratorKinds[kind]) { kind = 'key+value'; }
-		defineProperties(this, {
-			__kind__: d_1('', kind),
-			__values__: d_1('w', map.__mapValuesData__)
-		});
-	};
-	if (setPrototypeOf) { setPrototypeOf(MapIterator, es6Iterator); }
-
-	MapIterator.prototype = Object.create(es6Iterator.prototype, {
-		constructor: d_1(MapIterator),
-		_resolve: d_1(function (i) {
-			if (this.__kind__ === 'value') { return this.__values__[i]; }
-			if (this.__kind__ === 'key') { return this.__list__[i]; }
-			return [this.__list__[i], this.__values__[i]];
-		}),
-		_unBind: d_1(function () {
-			this.__values__ = null;
-			unBind.call(this);
-		}),
-		toString: d_1(function () { return '[object Map Iterator]'; })
-	});
-	Object.defineProperty(MapIterator.prototype, toStringTagSymbol,
-		d_1('c', 'Map Iterator'));
-	});
+	      return {
+	        s: F,
+	        n: function () {
+	          if (i >= o.length) return {
+	            done: true
+	          };
+	          return {
+	            done: false,
+	            value: o[i++]
+	          };
+	        },
+	        e: function (e) {
+	          throw e;
+	        },
+	        f: F
+	      };
+	    }
 
-	// Exports true if environment provides native `Map` implementation,
-
-	var isNativeImplemented$1 = (function () {
-		if (typeof Map === 'undefined') { return false; }
-		return (Object.prototype.toString.call(new Map()) === '[object Map]');
-	}());
-
-	var iterator$3       = validIterable
-
-	  , call$5 = Function.prototype.call
-	  , defineProperties$3 = Object.defineProperties, getPrototypeOf$2 = Object.getPrototypeOf
-	  , MapPoly;
-
-	var polyfill$3 = MapPoly = function (/*iterable*/) {
-		var iterable = arguments[0], keys, values, self;
-		if (!(this instanceof MapPoly)) { throw new TypeError('Constructor requires \'new\''); }
-		if (isNativeImplemented$1 && setPrototypeOf && (Map !== MapPoly)) {
-			self = setPrototypeOf(new Map(), getPrototypeOf$2(this));
-		} else {
-			self = this;
-		}
-		if (iterable != null) { iterator$3(iterable); }
-		defineProperties$3(self, {
-			__mapKeysData__: d_1('c', keys = []),
-			__mapValuesData__: d_1('c', values = [])
-		});
-		if (!iterable) { return self; }
-		forOf(iterable, function (value) {
-			var key = validValue(value)[0];
-			value = value[1];
-			if (eIndexOf.call(keys, key) !== -1) { return; }
-			keys.push(key);
-			values.push(value);
-		}, self);
-		return self;
-	};
+	    throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+	  }
 
-	if (isNativeImplemented$1) {
-		if (setPrototypeOf) { setPrototypeOf(MapPoly, Map); }
-		MapPoly.prototype = Object.create(Map.prototype, {
-			constructor: d_1(MapPoly)
-		});
-	}
-
-	eventEmitter(defineProperties$3(MapPoly.prototype, {
-		clear: d_1(function () {
-			if (!this.__mapKeysData__.length) { return; }
-			clear.call(this.__mapKeysData__);
-			clear.call(this.__mapValuesData__);
-			this.emit('_clear');
-		}),
-		delete: d_1(function (key) {
-			var index = eIndexOf.call(this.__mapKeysData__, key);
-			if (index === -1) { return false; }
-			this.__mapKeysData__.splice(index, 1);
-			this.__mapValuesData__.splice(index, 1);
-			this.emit('_delete', index, key);
-			return true;
-		}),
-		entries: d_1(function () { return new iterator$2(this, 'key+value'); }),
-		forEach: d_1(function (cb/*, thisArg*/) {
-			var thisArg = arguments[1], iterator, result;
-			validCallable(cb);
-			iterator = this.entries();
-			result = iterator._next();
-			while (result !== undefined) {
-				call$5.call(cb, thisArg, this.__mapValuesData__[result],
-					this.__mapKeysData__[result], this);
-				result = iterator._next();
-			}
-		}),
-		get: d_1(function (key) {
-			var index = eIndexOf.call(this.__mapKeysData__, key);
-			if (index === -1) { return; }
-			return this.__mapValuesData__[index];
-		}),
-		has: d_1(function (key) {
-			return (eIndexOf.call(this.__mapKeysData__, key) !== -1);
-		}),
-		keys: d_1(function () { return new iterator$2(this, 'key'); }),
-		set: d_1(function (key, value) {
-			var index = eIndexOf.call(this.__mapKeysData__, key), emit;
-			if (index === -1) {
-				index = this.__mapKeysData__.push(key) - 1;
-				emit = true;
-			}
-			this.__mapValuesData__[index] = value;
-			if (emit) { this.emit('_add', index, key); }
-			return this;
-		}),
-		size: d_1.gs(function () { return this.__mapKeysData__.length; }),
-		values: d_1(function () { return new iterator$2(this, 'value'); }),
-		toString: d_1(function () { return '[object Map]'; })
-	}));
-	Object.defineProperty(MapPoly.prototype, es6Symbol$1.iterator, d_1(function () {
-		return this.entries();
-	}));
-	Object.defineProperty(MapPoly.prototype, es6Symbol$1.toStringTag, d_1('c', 'Map'));
-
-	var es6Map = isImplemented$b() ? Map : polyfill$3;
-
-	var toStr = Object.prototype.toString;
-
-	var isArguments$1 = function isArguments(value) {
-		var str = toStr.call(value);
-		var isArgs = str === '[object Arguments]';
-		if (!isArgs) {
-			isArgs = str !== '[object Array]' &&
-				value !== null &&
-				typeof value === 'object' &&
-				typeof value.length === 'number' &&
-				value.length >= 0 &&
-				toStr.call(value.callee) === '[object Function]';
-		}
-		return isArgs;
-	};
+	  var normalCompletion = true,
+	      didErr = false,
+	      err;
+	  return {
+	    s: function () {
+	      it = it.call(o);
+	    },
+	    n: function () {
+	      var step = it.next();
+	      normalCompletion = step.done;
+	      return step;
+	    },
+	    e: function (e) {
+	      didErr = true;
+	      err = e;
+	    },
+	    f: function () {
+	      try {
+	        if (!normalCompletion && it.return != null) it.return();
+	      } finally {
+	        if (didErr) throw err;
+	      }
+	    }
+	  };
+	}
 
-	var keysShim;
-	if (!Object.keys) {
-		// modified from https://github.com/es-shims/es5-shim
-		var has = Object.prototype.hasOwnProperty;
-		var toStr$1 = Object.prototype.toString;
-		var isArgs = isArguments$1; // eslint-disable-line global-require
-		var isEnumerable = Object.prototype.propertyIsEnumerable;
-		var hasDontEnumBug = !isEnumerable.call({ toString: null }, 'toString');
-		var hasProtoEnumBug = isEnumerable.call(function () {}, 'prototype');
-		var dontEnums = [
-			'toString',
-			'toLocaleString',
-			'valueOf',
-			'hasOwnProperty',
-			'isPrototypeOf',
-			'propertyIsEnumerable',
-			'constructor'
-		];
-		var equalsConstructorPrototype = function (o) {
-			var ctor = o.constructor;
-			return ctor && ctor.prototype === o;
-		};
-		var excludedKeys = {
-			$applicationCache: true,
-			$console: true,
-			$external: true,
-			$frame: true,
-			$frameElement: true,
-			$frames: true,
-			$innerHeight: true,
-			$innerWidth: true,
-			$onmozfullscreenchange: true,
-			$onmozfullscreenerror: true,
-			$outerHeight: true,
-			$outerWidth: true,
-			$pageXOffset: true,
-			$pageYOffset: true,
-			$parent: true,
-			$scrollLeft: true,
-			$scrollTop: true,
-			$scrollX: true,
-			$scrollY: true,
-			$self: true,
-			$webkitIndexedDB: true,
-			$webkitStorageInfo: true,
-			$window: true
-		};
-		var hasAutomationEqualityBug = (function () {
-			/* global window */
-			if (typeof window === 'undefined') { return false; }
-			for (var k in window) {
-				try {
-					if (!excludedKeys['$' + k] && has.call(window, k) && window[k] !== null && typeof window[k] === 'object') {
-						try {
-							equalsConstructorPrototype(window[k]);
-						} catch (e) {
-							return true;
-						}
-					}
-				} catch (e$1) {
-					return true;
-				}
-			}
-			return false;
-		}());
-		var equalsConstructorPrototypeIfNotBuggy = function (o) {
-			/* global window */
-			if (typeof window === 'undefined' || !hasAutomationEqualityBug) {
-				return equalsConstructorPrototype(o);
-			}
-			try {
-				return equalsConstructorPrototype(o);
-			} catch (e) {
-				return false;
-			}
-		};
-
-		keysShim = function keys(object) {
-			var isObject = object !== null && typeof object === 'object';
-			var isFunction = toStr$1.call(object) === '[object Function]';
-			var isArguments = isArgs(object);
-			var isString = isObject && toStr$1.call(object) === '[object String]';
-			var theKeys = [];
-
-			if (!isObject && !isFunction && !isArguments) {
-				throw new TypeError('Object.keys called on a non-object');
-			}
-
-			var skipProto = hasProtoEnumBug && isFunction;
-			if (isString && object.length > 0 && !has.call(object, 0)) {
-				for (var i = 0; i < object.length; ++i) {
-					theKeys.push(String(i));
-				}
-			}
-
-			if (isArguments && object.length > 0) {
-				for (var j = 0; j < object.length; ++j) {
-					theKeys.push(String(j));
-				}
-			} else {
-				for (var name in object) {
-					if (!(skipProto && name === 'prototype') && has.call(object, name)) {
-						theKeys.push(String(name));
-					}
-				}
-			}
-
-			if (hasDontEnumBug) {
-				var skipConstructor = equalsConstructorPrototypeIfNotBuggy(object);
-
-				for (var k = 0; k < dontEnums.length; ++k) {
-					if (!(skipConstructor && dontEnums[k] === 'constructor') && has.call(object, dontEnums[k])) {
-						theKeys.push(dontEnums[k]);
-					}
-				}
-			}
-			return theKeys;
-		};
-	}
-	var implementation$1 = keysShim;
-
-	var slice = Array.prototype.slice;
-
-
-	var origKeys = Object.keys;
-	var keysShim$1 = origKeys ? function keys(o) { return origKeys(o); } : implementation$1;
-
-	var originalKeys = Object.keys;
-
-	keysShim$1.shim = function shimObjectKeys() {
-		if (Object.keys) {
-			var keysWorksWithArguments = (function () {
-				// Safari 5.0 bug
-				var args = Object.keys(arguments);
-				return args && args.length === arguments.length;
-			}(1, 2));
-			if (!keysWorksWithArguments) {
-				Object.keys = function keys(object) { // eslint-disable-line func-name-matching
-					if (isArguments$1(object)) {
-						return originalKeys(slice.call(object));
-					}
-					return originalKeys(object);
-				};
-			}
-		} else {
-			Object.keys = keysShim$1;
-		}
-		return Object.keys || keysShim$1;
-	};
+	var wellKnownSymbolWrapped = {};
 
-	var objectKeys = keysShim$1;
+	var getBuiltIn$7 = getBuiltIn$9;
 
-	var hasSymbols = typeof Symbol === 'function' && typeof Symbol('foo') === 'symbol';
+	var engineUserAgent = getBuiltIn$7('navigator', 'userAgent') || '';
 
-	var toStr$2 = Object.prototype.toString;
-	var concat = Array.prototype.concat;
-	var origDefineProperty = Object.defineProperty;
+	var global$v = global$F;
+	var userAgent$5 = engineUserAgent;
 
-	var isFunction$1 = function (fn) {
-		return typeof fn === 'function' && toStr$2.call(fn) === '[object Function]';
-	};
+	var process$4 = global$v.process;
+	var versions = process$4 && process$4.versions;
+	var v8 = versions && versions.v8;
+	var match, version$1;
 
-	var arePropertyDescriptorsSupported = function () {
-		var obj = {};
-		try {
-			origDefineProperty(obj, 'x', { enumerable: false, value: obj });
-			// eslint-disable-next-line no-unused-vars, no-restricted-syntax
-			for (var _ in obj) { // jscs:ignore disallowUnusedVariables
-				return false;
-			}
-			return obj.x === obj;
-		} catch (e) { /* this is IE 8. */
-			return false;
-		}
-	};
-	var supportsDescriptors = origDefineProperty && arePropertyDescriptorsSupported();
-
-	var defineProperty$8 = function (object, name, value, predicate) {
-		if (name in object && (!isFunction$1(predicate) || !predicate())) {
-			return;
-		}
-		if (supportsDescriptors) {
-			origDefineProperty(object, name, {
-				configurable: true,
-				enumerable: false,
-				value: value,
-				writable: true
-			});
-		} else {
-			object[name] = value;
-		}
-	};
+	if (v8) {
+	  match = v8.split('.');
+	  version$1 = match[0] < 4 ? 1 : match[0] + match[1];
+	} else if (userAgent$5) {
+	  match = userAgent$5.match(/Edge\/(\d+)/);
+	  if (!match || match[1] >= 74) {
+	    match = userAgent$5.match(/Chrome\/(\d+)/);
+	    if (match) version$1 = match[1];
+	  }
+	}
 
-	var defineProperties$4 = function (object, map) {
-		var predicates = arguments.length > 2 ? arguments[2] : {};
-		var props = objectKeys(map);
-		if (hasSymbols) {
-			props = concat.call(props, Object.getOwnPropertySymbols(map));
-		}
-		for (var i = 0; i < props.length; i += 1) {
-			defineProperty$8(object, props[i], map[props[i]], predicates[props[i]]);
-		}
-	};
+	var engineV8Version = version$1 && +version$1;
 
-	defineProperties$4.supportsDescriptors = !!supportsDescriptors;
+	/* eslint-disable es/no-symbol -- required for testing */
 
-	var defineProperties_1 = defineProperties$4;
+	var V8_VERSION$3 = engineV8Version;
+	var fails$I = fails$N;
 
-	/* eslint complexity: [2, 18], max-statements: [2, 33] */
-	var shams = function hasSymbols() {
-		if (typeof Symbol !== 'function' || typeof Object.getOwnPropertySymbols !== 'function') { return false; }
-		if (typeof Symbol.iterator === 'symbol') { return true; }
+	// eslint-disable-next-line es/no-object-getownpropertysymbols -- required for testing
+	var nativeSymbol = !!Object.getOwnPropertySymbols && !fails$I(function () {
+	  var symbol = Symbol();
+	  // Chrome 38 Symbol has incorrect toString conversion
+	  // `get-own-property-symbols` polyfill symbols converted to object are not Symbol instances
+	  return !String(symbol) || !(Object(symbol) instanceof Symbol) ||
+	    // Chrome 38-40 symbols are not inherited from DOM collections prototypes to instances
+	    !Symbol.sham && V8_VERSION$3 && V8_VERSION$3 < 41;
+	});
 
-		var obj = {};
-		var sym = Symbol('test');
-		var symObj = Object(sym);
-		if (typeof sym === 'string') { return false; }
+	/* eslint-disable es/no-symbol -- required for testing */
 
-		if (Object.prototype.toString.call(sym) !== '[object Symbol]') { return false; }
-		if (Object.prototype.toString.call(symObj) !== '[object Symbol]') { return false; }
+	var NATIVE_SYMBOL$2 = nativeSymbol;
 
-		// temp disabled per https://github.com/ljharb/object.assign/issues/17
-		// if (sym instanceof Symbol) { return false; }
-		// temp disabled per https://github.com/WebReflection/get-own-property-symbols/issues/4
-		// if (!(symObj instanceof Symbol)) { return false; }
+	var useSymbolAsUid = NATIVE_SYMBOL$2
+	  && !Symbol.sham
+	  && typeof Symbol.iterator == 'symbol';
 
-		// if (typeof Symbol.prototype.toString !== 'function') { return false; }
-		// if (String(sym) !== Symbol.prototype.toString.call(sym)) { return false; }
+	var global$u = global$F;
+	var shared$2 = shared$5.exports;
+	var has$d = has$j;
+	var uid$3 = uid$5;
+	var NATIVE_SYMBOL$1 = nativeSymbol;
+	var USE_SYMBOL_AS_UID$1 = useSymbolAsUid;
 
-		var symVal = 42;
-		obj[sym] = symVal;
-		for (sym in obj) { return false; } // eslint-disable-line no-restricted-syntax
-		if (typeof Object.keys === 'function' && Object.keys(obj).length !== 0) { return false; }
+	var WellKnownSymbolsStore$1 = shared$2('wks');
+	var Symbol$1 = global$u.Symbol;
+	var createWellKnownSymbol = USE_SYMBOL_AS_UID$1 ? Symbol$1 : Symbol$1 && Symbol$1.withoutSetter || uid$3;
 
-		if (typeof Object.getOwnPropertyNames === 'function' && Object.getOwnPropertyNames(obj).length !== 0) { return false; }
+	var wellKnownSymbol$s = function (name) {
+	  if (!has$d(WellKnownSymbolsStore$1, name) || !(NATIVE_SYMBOL$1 || typeof WellKnownSymbolsStore$1[name] == 'string')) {
+	    if (NATIVE_SYMBOL$1 && has$d(Symbol$1, name)) {
+	      WellKnownSymbolsStore$1[name] = Symbol$1[name];
+	    } else {
+	      WellKnownSymbolsStore$1[name] = createWellKnownSymbol('Symbol.' + name);
+	    }
+	  } return WellKnownSymbolsStore$1[name];
+	};
 
-		var syms = Object.getOwnPropertySymbols(obj);
-		if (syms.length !== 1 || syms[0] !== sym) { return false; }
+	var wellKnownSymbol$r = wellKnownSymbol$s;
 
-		if (!Object.prototype.propertyIsEnumerable.call(obj, sym)) { return false; }
+	wellKnownSymbolWrapped.f = wellKnownSymbol$r;
 
-		if (typeof Object.getOwnPropertyDescriptor === 'function') {
-			var descriptor = Object.getOwnPropertyDescriptor(obj, sym);
-			if (descriptor.value !== symVal || descriptor.enumerable !== true) { return false; }
-		}
+	var path = path$2;
+	var has$c = has$j;
+	var wrappedWellKnownSymbolModule$1 = wellKnownSymbolWrapped;
+	var defineProperty$a = objectDefineProperty.f;
 
-		return true;
+	var defineWellKnownSymbol$4 = function (NAME) {
+	  var Symbol = path.Symbol || (path.Symbol = {});
+	  if (!has$c(Symbol, NAME)) defineProperty$a(Symbol, NAME, {
+	    value: wrappedWellKnownSymbolModule$1.f(NAME)
+	  });
 	};
 
-	var origSymbol = commonjsGlobal.Symbol;
+	var defineWellKnownSymbol$3 = defineWellKnownSymbol$4;
 
+	// `Symbol.iterator` well-known symbol
+	// https://tc39.es/ecma262/#sec-symbol.iterator
+	defineWellKnownSymbol$3('iterator');
 
-	var hasSymbols$1 = function hasNativeSymbols() {
-		if (typeof origSymbol !== 'function') { return false; }
-		if (typeof Symbol !== 'function') { return false; }
-		if (typeof origSymbol('foo') !== 'symbol') { return false; }
-		if (typeof Symbol('bar') !== 'symbol') { return false; }
+	var internalObjectKeys = objectKeysInternal;
+	var enumBugKeys$1 = enumBugKeys$3;
 
-		return shams();
+	// `Object.keys` method
+	// https://tc39.es/ecma262/#sec-object.keys
+	// eslint-disable-next-line es/no-object-keys -- safe
+	var objectKeys$4 = Object.keys || function keys(O) {
+	  return internalObjectKeys(O, enumBugKeys$1);
 	};
 
-	/* eslint no-invalid-this: 1 */
-
-	var ERROR_MESSAGE = 'Function.prototype.bind called on incompatible ';
-	var slice$1 = Array.prototype.slice;
-	var toStr$3 = Object.prototype.toString;
-	var funcType = '[object Function]';
-
-	var implementation$2 = function bind(that) {
-	    var target = this;
-	    if (typeof target !== 'function' || toStr$3.call(target) !== funcType) {
-	        throw new TypeError(ERROR_MESSAGE + target);
-	    }
-	    var args = slice$1.call(arguments, 1);
-
-	    var bound;
-	    var binder = function () {
-	        if (this instanceof bound) {
-	            var result = target.apply(
-	                this,
-	                args.concat(slice$1.call(arguments))
-	            );
-	            if (Object(result) === result) {
-	                return result;
-	            }
-	            return this;
-	        } else {
-	            return target.apply(
-	                that,
-	                args.concat(slice$1.call(arguments))
-	            );
-	        }
-	    };
-
-	    var boundLength = Math.max(0, target.length - args.length);
-	    var boundArgs = [];
-	    for (var i = 0; i < boundLength; i++) {
-	        boundArgs.push('$' + i);
-	    }
-
-	    bound = Function('binder', 'return function (' + boundArgs.join(',') + '){ return binder.apply(this,arguments); }')(binder);
-
-	    if (target.prototype) {
-	        var Empty = function Empty() {};
-	        Empty.prototype = target.prototype;
-	        bound.prototype = new Empty();
-	        Empty.prototype = null;
-	    }
+	var DESCRIPTORS$i = descriptors;
+	var definePropertyModule$5 = objectDefineProperty;
+	var anObject$j = anObject$m;
+	var objectKeys$3 = objectKeys$4;
 
-	    return bound;
+	// `Object.defineProperties` method
+	// https://tc39.es/ecma262/#sec-object.defineproperties
+	// eslint-disable-next-line es/no-object-defineproperties -- safe
+	var objectDefineProperties = DESCRIPTORS$i ? Object.defineProperties : function defineProperties(O, Properties) {
+	  anObject$j(O);
+	  var keys = objectKeys$3(Properties);
+	  var length = keys.length;
+	  var index = 0;
+	  var key;
+	  while (length > index) definePropertyModule$5.f(O, key = keys[index++], Properties[key]);
+	  return O;
+	};
+
+	var getBuiltIn$6 = getBuiltIn$9;
+
+	var html$2 = getBuiltIn$6('document', 'documentElement');
+
+	var anObject$i = anObject$m;
+	var defineProperties$2 = objectDefineProperties;
+	var enumBugKeys = enumBugKeys$3;
+	var hiddenKeys$2 = hiddenKeys$6;
+	var html$1 = html$2;
+	var documentCreateElement = documentCreateElement$1;
+	var sharedKey$2 = sharedKey$4;
+
+	var GT = '>';
+	var LT = '<';
+	var PROTOTYPE$2 = 'prototype';
+	var SCRIPT = 'script';
+	var IE_PROTO$1 = sharedKey$2('IE_PROTO');
+
+	var EmptyConstructor = function () { /* empty */ };
+
+	var scriptTag = function (content) {
+	  return LT + SCRIPT + GT + content + LT + '/' + SCRIPT + GT;
+	};
+
+	// Create object with fake `null` prototype: use ActiveX Object with cleared prototype
+	var NullProtoObjectViaActiveX = function (activeXDocument) {
+	  activeXDocument.write(scriptTag(''));
+	  activeXDocument.close();
+	  var temp = activeXDocument.parentWindow.Object;
+	  activeXDocument = null; // avoid memory leak
+	  return temp;
+	};
+
+	// Create object with fake `null` prototype: use iframe Object with cleared prototype
+	var NullProtoObjectViaIFrame = function () {
+	  // Thrash, waste and sodomy: IE GC bug
+	  var iframe = documentCreateElement('iframe');
+	  var JS = 'java' + SCRIPT + ':';
+	  var iframeDocument;
+	  iframe.style.display = 'none';
+	  html$1.appendChild(iframe);
+	  // https://github.com/zloirock/core-js/issues/475
+	  iframe.src = String(JS);
+	  iframeDocument = iframe.contentWindow.document;
+	  iframeDocument.open();
+	  iframeDocument.write(scriptTag('document.F=Object'));
+	  iframeDocument.close();
+	  return iframeDocument.F;
+	};
+
+	// Check for document.domain and active x support
+	// No need to use active x approach when document.domain is not set
+	// see https://github.com/es-shims/es5-shim/issues/150
+	// variation of https://github.com/kitcambridge/es5-shim/commit/4f738ac066346
+	// avoid IE GC bug
+	var activeXDocument;
+	var NullProtoObject = function () {
+	  try {
+	    /* global ActiveXObject -- old IE */
+	    activeXDocument = document.domain && new ActiveXObject('htmlfile');
+	  } catch (error) { /* ignore */ }
+	  NullProtoObject = activeXDocument ? NullProtoObjectViaActiveX(activeXDocument) : NullProtoObjectViaIFrame();
+	  var length = enumBugKeys.length;
+	  while (length--) delete NullProtoObject[PROTOTYPE$2][enumBugKeys[length]];
+	  return NullProtoObject();
 	};
 
-	var functionBind = Function.prototype.bind || implementation$2;
+	hiddenKeys$2[IE_PROTO$1] = true;
 
-	/* globals
-		Atomics,
-		SharedArrayBuffer,
-	*/
+	// `Object.create` method
+	// https://tc39.es/ecma262/#sec-object.create
+	var objectCreate = Object.create || function create(O, Properties) {
+	  var result;
+	  if (O !== null) {
+	    EmptyConstructor[PROTOTYPE$2] = anObject$i(O);
+	    result = new EmptyConstructor();
+	    EmptyConstructor[PROTOTYPE$2] = null;
+	    // add "__proto__" for Object.getPrototypeOf polyfill
+	    result[IE_PROTO$1] = O;
+	  } else result = NullProtoObject();
+	  return Properties === undefined ? result : defineProperties$2(result, Properties);
+	};
+
+	var wellKnownSymbol$q = wellKnownSymbol$s;
+	var create$b = objectCreate;
+	var definePropertyModule$4 = objectDefineProperty;
+
+	var UNSCOPABLES = wellKnownSymbol$q('unscopables');
+	var ArrayPrototype$1 = Array.prototype;
+
+	// Array.prototype[@@unscopables]
+	// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+	if (ArrayPrototype$1[UNSCOPABLES] == undefined) {
+	  definePropertyModule$4.f(ArrayPrototype$1, UNSCOPABLES, {
+	    configurable: true,
+	    value: create$b(null)
+	  });
+	}
 
-	var undefined$1;
-
-	var $TypeError = TypeError;
-
-	var $gOPD = Object.getOwnPropertyDescriptor;
-	if ($gOPD) {
-		try {
-			$gOPD({}, '');
-		} catch (e) {
-			$gOPD = null; // this is IE 8, which has a broken gOPD
-		}
-	}
-
-	var throwTypeError = function () { throw new $TypeError(); };
-	var ThrowTypeError = $gOPD
-		? (function () {
-			try {
-				// eslint-disable-next-line no-unused-expressions, no-caller, no-restricted-properties
-				arguments.callee; // IE 8 does not throw here
-				return throwTypeError;
-			} catch (calleeThrows) {
-				try {
-					// IE 8 throws on Object.getOwnPropertyDescriptor(arguments, '')
-					return $gOPD(arguments, 'callee').get;
-				} catch (gOPDthrows) {
-					return throwTypeError;
-				}
-			}
-		}())
-		: throwTypeError;
-
-	var hasSymbols$2 = hasSymbols$1();
-
-	var getProto = Object.getPrototypeOf || function (x) { return x.__proto__; }; // eslint-disable-line no-proto
-	var generatorFunction =  undefined$1;
-	var asyncFunction =  undefined$1;
-	var asyncGenFunction =  undefined$1;
-
-	var TypedArray = typeof Uint8Array === 'undefined' ? undefined$1 : getProto(Uint8Array);
-
-	var INTRINSICS = {
-		'%Array%': Array,
-		'%ArrayBuffer%': typeof ArrayBuffer === 'undefined' ? undefined$1 : ArrayBuffer,
-		'%ArrayBufferPrototype%': typeof ArrayBuffer === 'undefined' ? undefined$1 : ArrayBuffer.prototype,
-		'%ArrayIteratorPrototype%': hasSymbols$2 ? getProto([][Symbol.iterator]()) : undefined$1,
-		'%ArrayPrototype%': Array.prototype,
-		'%ArrayProto_entries%': Array.prototype.entries,
-		'%ArrayProto_forEach%': Array.prototype.forEach,
-		'%ArrayProto_keys%': Array.prototype.keys,
-		'%ArrayProto_values%': Array.prototype.values,
-		'%AsyncFromSyncIteratorPrototype%': undefined$1,
-		'%AsyncFunction%': asyncFunction,
-		'%AsyncFunctionPrototype%':  undefined$1,
-		'%AsyncGenerator%':  undefined$1,
-		'%AsyncGeneratorFunction%': asyncGenFunction,
-		'%AsyncGeneratorPrototype%':  undefined$1,
-		'%AsyncIteratorPrototype%':  undefined$1,
-		'%Atomics%': typeof Atomics === 'undefined' ? undefined$1 : Atomics,
-		'%Boolean%': Boolean,
-		'%BooleanPrototype%': Boolean.prototype,
-		'%DataView%': typeof DataView === 'undefined' ? undefined$1 : DataView,
-		'%DataViewPrototype%': typeof DataView === 'undefined' ? undefined$1 : DataView.prototype,
-		'%Date%': Date,
-		'%DatePrototype%': Date.prototype,
-		'%decodeURI%': decodeURI,
-		'%decodeURIComponent%': decodeURIComponent,
-		'%encodeURI%': encodeURI,
-		'%encodeURIComponent%': encodeURIComponent,
-		'%Error%': Error,
-		'%ErrorPrototype%': Error.prototype,
-		'%eval%': eval, // eslint-disable-line no-eval
-		'%EvalError%': EvalError,
-		'%EvalErrorPrototype%': EvalError.prototype,
-		'%Float32Array%': typeof Float32Array === 'undefined' ? undefined$1 : Float32Array,
-		'%Float32ArrayPrototype%': typeof Float32Array === 'undefined' ? undefined$1 : Float32Array.prototype,
-		'%Float64Array%': typeof Float64Array === 'undefined' ? undefined$1 : Float64Array,
-		'%Float64ArrayPrototype%': typeof Float64Array === 'undefined' ? undefined$1 : Float64Array.prototype,
-		'%Function%': Function,
-		'%FunctionPrototype%': Function.prototype,
-		'%Generator%':  undefined$1,
-		'%GeneratorFunction%': generatorFunction,
-		'%GeneratorPrototype%':  undefined$1,
-		'%Int8Array%': typeof Int8Array === 'undefined' ? undefined$1 : Int8Array,
-		'%Int8ArrayPrototype%': typeof Int8Array === 'undefined' ? undefined$1 : Int8Array.prototype,
-		'%Int16Array%': typeof Int16Array === 'undefined' ? undefined$1 : Int16Array,
-		'%Int16ArrayPrototype%': typeof Int16Array === 'undefined' ? undefined$1 : Int8Array.prototype,
-		'%Int32Array%': typeof Int32Array === 'undefined' ? undefined$1 : Int32Array,
-		'%Int32ArrayPrototype%': typeof Int32Array === 'undefined' ? undefined$1 : Int32Array.prototype,
-		'%isFinite%': isFinite,
-		'%isNaN%': isNaN,
-		'%IteratorPrototype%': hasSymbols$2 ? getProto(getProto([][Symbol.iterator]())) : undefined$1,
-		'%JSON%': typeof JSON === 'object' ? JSON : undefined$1,
-		'%JSONParse%': typeof JSON === 'object' ? JSON.parse : undefined$1,
-		'%Map%': typeof Map === 'undefined' ? undefined$1 : Map,
-		'%MapIteratorPrototype%': typeof Map === 'undefined' || !hasSymbols$2 ? undefined$1 : getProto(new Map()[Symbol.iterator]()),
-		'%MapPrototype%': typeof Map === 'undefined' ? undefined$1 : Map.prototype,
-		'%Math%': Math,
-		'%Number%': Number,
-		'%NumberPrototype%': Number.prototype,
-		'%Object%': Object,
-		'%ObjectPrototype%': Object.prototype,
-		'%ObjProto_toString%': Object.prototype.toString,
-		'%ObjProto_valueOf%': Object.prototype.valueOf,
-		'%parseFloat%': parseFloat,
-		'%parseInt%': parseInt,
-		'%Promise%': typeof Promise === 'undefined' ? undefined$1 : Promise,
-		'%PromisePrototype%': typeof Promise === 'undefined' ? undefined$1 : Promise.prototype,
-		'%PromiseProto_then%': typeof Promise === 'undefined' ? undefined$1 : Promise.prototype.then,
-		'%Promise_all%': typeof Promise === 'undefined' ? undefined$1 : Promise.all,
-		'%Promise_reject%': typeof Promise === 'undefined' ? undefined$1 : Promise.reject,
-		'%Promise_resolve%': typeof Promise === 'undefined' ? undefined$1 : Promise.resolve,
-		'%Proxy%': typeof Proxy === 'undefined' ? undefined$1 : Proxy,
-		'%RangeError%': RangeError,
-		'%RangeErrorPrototype%': RangeError.prototype,
-		'%ReferenceError%': ReferenceError,
-		'%ReferenceErrorPrototype%': ReferenceError.prototype,
-		'%Reflect%': typeof Reflect === 'undefined' ? undefined$1 : Reflect,
-		'%RegExp%': RegExp,
-		'%RegExpPrototype%': RegExp.prototype,
-		'%Set%': typeof Set === 'undefined' ? undefined$1 : Set,
-		'%SetIteratorPrototype%': typeof Set === 'undefined' || !hasSymbols$2 ? undefined$1 : getProto(new Set()[Symbol.iterator]()),
-		'%SetPrototype%': typeof Set === 'undefined' ? undefined$1 : Set.prototype,
-		'%SharedArrayBuffer%': typeof SharedArrayBuffer === 'undefined' ? undefined$1 : SharedArrayBuffer,
-		'%SharedArrayBufferPrototype%': typeof SharedArrayBuffer === 'undefined' ? undefined$1 : SharedArrayBuffer.prototype,
-		'%String%': String,
-		'%StringIteratorPrototype%': hasSymbols$2 ? getProto(''[Symbol.iterator]()) : undefined$1,
-		'%StringPrototype%': String.prototype,
-		'%Symbol%': hasSymbols$2 ? Symbol : undefined$1,
-		'%SymbolPrototype%': hasSymbols$2 ? Symbol.prototype : undefined$1,
-		'%SyntaxError%': SyntaxError,
-		'%SyntaxErrorPrototype%': SyntaxError.prototype,
-		'%ThrowTypeError%': ThrowTypeError,
-		'%TypedArray%': TypedArray,
-		'%TypedArrayPrototype%': TypedArray ? TypedArray.prototype : undefined$1,
-		'%TypeError%': $TypeError,
-		'%TypeErrorPrototype%': $TypeError.prototype,
-		'%Uint8Array%': typeof Uint8Array === 'undefined' ? undefined$1 : Uint8Array,
-		'%Uint8ArrayPrototype%': typeof Uint8Array === 'undefined' ? undefined$1 : Uint8Array.prototype,
-		'%Uint8ClampedArray%': typeof Uint8ClampedArray === 'undefined' ? undefined$1 : Uint8ClampedArray,
-		'%Uint8ClampedArrayPrototype%': typeof Uint8ClampedArray === 'undefined' ? undefined$1 : Uint8ClampedArray.prototype,
-		'%Uint16Array%': typeof Uint16Array === 'undefined' ? undefined$1 : Uint16Array,
-		'%Uint16ArrayPrototype%': typeof Uint16Array === 'undefined' ? undefined$1 : Uint16Array.prototype,
-		'%Uint32Array%': typeof Uint32Array === 'undefined' ? undefined$1 : Uint32Array,
-		'%Uint32ArrayPrototype%': typeof Uint32Array === 'undefined' ? undefined$1 : Uint32Array.prototype,
-		'%URIError%': URIError,
-		'%URIErrorPrototype%': URIError.prototype,
-		'%WeakMap%': typeof WeakMap === 'undefined' ? undefined$1 : WeakMap,
-		'%WeakMapPrototype%': typeof WeakMap === 'undefined' ? undefined$1 : WeakMap.prototype,
-		'%WeakSet%': typeof WeakSet === 'undefined' ? undefined$1 : WeakSet,
-		'%WeakSetPrototype%': typeof WeakSet === 'undefined' ? undefined$1 : WeakSet.prototype
+	// add a key to Array.prototype[@@unscopables]
+	var addToUnscopables$5 = function (key) {
+	  ArrayPrototype$1[UNSCOPABLES][key] = true;
 	};
 
+	var iterators = {};
 
-	var $replace = functionBind.call(Function.call, String.prototype.replace);
+	var fails$H = fails$N;
 
-	/* adapted from https://github.com/lodash/lodash/blob/4.17.15/dist/lodash.js#L6735-L6744 */
-	var rePropName = /[^%.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|%$))/g;
-	var reEscapeChar = /\\(\\)?/g; /** Used to match backslashes in property paths. */
-	var stringToPath = function stringToPath(string) {
-		var result = [];
-		$replace(string, rePropName, function (match, number, quote, subString) {
-			result[result.length] = quote ? $replace(subString, reEscapeChar, '$1') : (number || match);
-		});
-		return result;
-	};
-	/* end adaptation */
+	var correctPrototypeGetter = !fails$H(function () {
+	  function F() { /* empty */ }
+	  F.prototype.constructor = null;
+	  // eslint-disable-next-line es/no-object-getprototypeof -- required for testing
+	  return Object.getPrototypeOf(new F()) !== F.prototype;
+	});
+
+	var has$b = has$j;
+	var toObject$g = toObject$i;
+	var sharedKey$1 = sharedKey$4;
+	var CORRECT_PROTOTYPE_GETTER$1 = correctPrototypeGetter;
+
+	var IE_PROTO = sharedKey$1('IE_PROTO');
+	var ObjectPrototype$3 = Object.prototype;
+
+	// `Object.getPrototypeOf` method
+	// https://tc39.es/ecma262/#sec-object.getprototypeof
+	// eslint-disable-next-line es/no-object-getprototypeof -- safe
+	var objectGetPrototypeOf = CORRECT_PROTOTYPE_GETTER$1 ? Object.getPrototypeOf : function (O) {
+	  O = toObject$g(O);
+	  if (has$b(O, IE_PROTO)) return O[IE_PROTO];
+	  if (typeof O.constructor == 'function' && O instanceof O.constructor) {
+	    return O.constructor.prototype;
+	  } return O instanceof Object ? ObjectPrototype$3 : null;
+	};
+
+	var fails$G = fails$N;
+	var getPrototypeOf$4 = objectGetPrototypeOf;
+	var createNonEnumerableProperty$9 = createNonEnumerableProperty$e;
+	var has$a = has$j;
+	var wellKnownSymbol$p = wellKnownSymbol$s;
+
+	var ITERATOR$8 = wellKnownSymbol$p('iterator');
+	var BUGGY_SAFARI_ITERATORS$1 = false;
+
+	var returnThis$2 = function () { return this; };
+
+	// `%IteratorPrototype%` object
+	// https://tc39.es/ecma262/#sec-%iteratorprototype%-object
+	var IteratorPrototype$2, PrototypeOfArrayIteratorPrototype, arrayIterator;
+
+	/* eslint-disable es/no-array-prototype-keys -- safe */
+	if ([].keys) {
+	  arrayIterator = [].keys();
+	  // Safari 8 has buggy iterators w/o `next`
+	  if (!('next' in arrayIterator)) BUGGY_SAFARI_ITERATORS$1 = true;
+	  else {
+	    PrototypeOfArrayIteratorPrototype = getPrototypeOf$4(getPrototypeOf$4(arrayIterator));
+	    if (PrototypeOfArrayIteratorPrototype !== Object.prototype) IteratorPrototype$2 = PrototypeOfArrayIteratorPrototype;
+	  }
+	}
 
-	var getBaseIntrinsic = function getBaseIntrinsic(name, allowMissing) {
-		if (!(name in INTRINSICS)) {
-			throw new SyntaxError('intrinsic ' + name + ' does not exist!');
-		}
+	var NEW_ITERATOR_PROTOTYPE = IteratorPrototype$2 == undefined || fails$G(function () {
+	  var test = {};
+	  // FF44- legacy iterators case
+	  return IteratorPrototype$2[ITERATOR$8].call(test) !== test;
+	});
 
-		// istanbul ignore if // hopefully this is impossible to test :-)
-		if (typeof INTRINSICS[name] === 'undefined' && !allowMissing) {
-			throw new $TypeError('intrinsic ' + name + ' exists, but is not available. Please file an issue!');
-		}
+	if (NEW_ITERATOR_PROTOTYPE) IteratorPrototype$2 = {};
 
-		return INTRINSICS[name];
-	};
+	// `%IteratorPrototype%[@@iterator]()` method
+	// https://tc39.es/ecma262/#sec-%iteratorprototype%-@@iterator
+	if (!has$a(IteratorPrototype$2, ITERATOR$8)) {
+	  createNonEnumerableProperty$9(IteratorPrototype$2, ITERATOR$8, returnThis$2);
+	}
 
-	var GetIntrinsic = function GetIntrinsic(name, allowMissing) {
-		if (typeof name !== 'string' || name.length === 0) {
-			throw new TypeError('intrinsic name must be a non-empty string');
-		}
-		if (arguments.length > 1 && typeof allowMissing !== 'boolean') {
-			throw new TypeError('"allowMissing" argument must be a boolean');
-		}
-
-		var parts = stringToPath(name);
-
-		var value = getBaseIntrinsic('%' + (parts.length > 0 ? parts[0] : '') + '%', allowMissing);
-		for (var i = 1; i < parts.length; i += 1) {
-			if (value != null) {
-				if ($gOPD && (i + 1) >= parts.length) {
-					var desc = $gOPD(value, parts[i]);
-					if (!allowMissing && !(parts[i] in value)) {
-						throw new $TypeError('base intrinsic for ' + name + ' exists, but the property is not available.');
-					}
-					value = desc ? (desc.get || desc.value) : value[parts[i]];
-				} else {
-					value = value[parts[i]];
-				}
-			}
-		}
-		return value;
+	var iteratorsCore = {
+	  IteratorPrototype: IteratorPrototype$2,
+	  BUGGY_SAFARI_ITERATORS: BUGGY_SAFARI_ITERATORS$1
 	};
 
-	var $TypeError$1 = GetIntrinsic('%TypeError%');
+	var defineProperty$9 = objectDefineProperty.f;
+	var has$9 = has$j;
+	var wellKnownSymbol$o = wellKnownSymbol$s;
 
-	// http://www.ecma-international.org/ecma-262/5.1/#sec-9.10
+	var TO_STRING_TAG$4 = wellKnownSymbol$o('toStringTag');
 
-	var CheckObjectCoercible = function CheckObjectCoercible(value, optMessage) {
-		if (value == null) {
-			throw new $TypeError$1(optMessage || ('Cannot call method on ' + value));
-		}
-		return value;
+	var setToStringTag$a = function (it, TAG, STATIC) {
+	  if (it && !has$9(it = STATIC ? it : it.prototype, TO_STRING_TAG$4)) {
+	    defineProperty$9(it, TO_STRING_TAG$4, { configurable: true, value: TAG });
+	  }
 	};
 
-	var RequireObjectCoercible = CheckObjectCoercible;
-
-	var $Object = GetIntrinsic('%Object%');
+	var IteratorPrototype$1 = iteratorsCore.IteratorPrototype;
+	var create$a = objectCreate;
+	var createPropertyDescriptor$4 = createPropertyDescriptor$7;
+	var setToStringTag$9 = setToStringTag$a;
+	var Iterators$4 = iterators;
 
+	var returnThis$1 = function () { return this; };
 
+	var createIteratorConstructor$2 = function (IteratorConstructor, NAME, next) {
+	  var TO_STRING_TAG = NAME + ' Iterator';
+	  IteratorConstructor.prototype = create$a(IteratorPrototype$1, { next: createPropertyDescriptor$4(1, next) });
+	  setToStringTag$9(IteratorConstructor, TO_STRING_TAG, false);
+	  Iterators$4[TO_STRING_TAG] = returnThis$1;
+	  return IteratorConstructor;
+	};
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-toobject
+	var isObject$m = isObject$r;
 
-	var ToObject = function ToObject(value) {
-		RequireObjectCoercible(value);
-		return $Object(value);
+	var aPossiblePrototype$1 = function (it) {
+	  if (!isObject$m(it) && it !== null) {
+	    throw TypeError("Can't set " + String(it) + ' as a prototype');
+	  } return it;
 	};
 
-	var $Math = GetIntrinsic('%Math%');
-	var $Number = GetIntrinsic('%Number%');
-
-	var maxSafeInteger = $Number.MAX_SAFE_INTEGER || $Math.pow(2, 53) - 1;
+	/* eslint-disable no-proto -- safe */
 
-	// http://www.ecma-international.org/ecma-262/5.1/#sec-9.3
+	var anObject$h = anObject$m;
+	var aPossiblePrototype = aPossiblePrototype$1;
 
-	var ToNumber = function ToNumber(value) {
-		return +value; // eslint-disable-line no-implicit-coercion
-	};
+	// `Object.setPrototypeOf` method
+	// https://tc39.es/ecma262/#sec-object.setprototypeof
+	// Works with __proto__ only. Old v8 can't work with null proto objects.
+	// eslint-disable-next-line es/no-object-setprototypeof -- safe
+	var objectSetPrototypeOf = Object.setPrototypeOf || ('__proto__' in {} ? function () {
+	  var CORRECT_SETTER = false;
+	  var test = {};
+	  var setter;
+	  try {
+	    // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+	    setter = Object.getOwnPropertyDescriptor(Object.prototype, '__proto__').set;
+	    setter.call(test, []);
+	    CORRECT_SETTER = test instanceof Array;
+	  } catch (error) { /* empty */ }
+	  return function setPrototypeOf(O, proto) {
+	    anObject$h(O);
+	    aPossiblePrototype(proto);
+	    if (CORRECT_SETTER) setter.call(O, proto);
+	    else O.__proto__ = proto;
+	    return O;
+	  };
+	}() : undefined);
+
+	var $$15 = _export;
+	var createIteratorConstructor$1 = createIteratorConstructor$2;
+	var getPrototypeOf$3 = objectGetPrototypeOf;
+	var setPrototypeOf$6 = objectSetPrototypeOf;
+	var setToStringTag$8 = setToStringTag$a;
+	var createNonEnumerableProperty$8 = createNonEnumerableProperty$e;
+	var redefine$d = redefine$g.exports;
+	var wellKnownSymbol$n = wellKnownSymbol$s;
+	var Iterators$3 = iterators;
+	var IteratorsCore = iteratorsCore;
+
+	var IteratorPrototype = IteratorsCore.IteratorPrototype;
+	var BUGGY_SAFARI_ITERATORS = IteratorsCore.BUGGY_SAFARI_ITERATORS;
+	var ITERATOR$7 = wellKnownSymbol$n('iterator');
+	var KEYS = 'keys';
+	var VALUES = 'values';
+	var ENTRIES = 'entries';
+
+	var returnThis = function () { return this; };
+
+	var defineIterator$3 = function (Iterable, NAME, IteratorConstructor, next, DEFAULT, IS_SET, FORCED) {
+	  createIteratorConstructor$1(IteratorConstructor, NAME, next);
+
+	  var getIterationMethod = function (KIND) {
+	    if (KIND === DEFAULT && defaultIterator) return defaultIterator;
+	    if (!BUGGY_SAFARI_ITERATORS && KIND in IterablePrototype) return IterablePrototype[KIND];
+	    switch (KIND) {
+	      case KEYS: return function keys() { return new IteratorConstructor(this, KIND); };
+	      case VALUES: return function values() { return new IteratorConstructor(this, KIND); };
+	      case ENTRIES: return function entries() { return new IteratorConstructor(this, KIND); };
+	    } return function () { return new IteratorConstructor(this); };
+	  };
+
+	  var TO_STRING_TAG = NAME + ' Iterator';
+	  var INCORRECT_VALUES_NAME = false;
+	  var IterablePrototype = Iterable.prototype;
+	  var nativeIterator = IterablePrototype[ITERATOR$7]
+	    || IterablePrototype['@@iterator']
+	    || DEFAULT && IterablePrototype[DEFAULT];
+	  var defaultIterator = !BUGGY_SAFARI_ITERATORS && nativeIterator || getIterationMethod(DEFAULT);
+	  var anyNativeIterator = NAME == 'Array' ? IterablePrototype.entries || nativeIterator : nativeIterator;
+	  var CurrentIteratorPrototype, methods, KEY;
+
+	  // fix native
+	  if (anyNativeIterator) {
+	    CurrentIteratorPrototype = getPrototypeOf$3(anyNativeIterator.call(new Iterable()));
+	    if (IteratorPrototype !== Object.prototype && CurrentIteratorPrototype.next) {
+	      if (getPrototypeOf$3(CurrentIteratorPrototype) !== IteratorPrototype) {
+	        if (setPrototypeOf$6) {
+	          setPrototypeOf$6(CurrentIteratorPrototype, IteratorPrototype);
+	        } else if (typeof CurrentIteratorPrototype[ITERATOR$7] != 'function') {
+	          createNonEnumerableProperty$8(CurrentIteratorPrototype, ITERATOR$7, returnThis);
+	        }
+	      }
+	      // Set @@toStringTag to native iterators
+	      setToStringTag$8(CurrentIteratorPrototype, TO_STRING_TAG, true);
+	    }
+	  }
 
-	var _isNaN = Number.isNaN || function isNaN(a) {
-		return a !== a;
-	};
+	  // fix Array.prototype.{ values, @@iterator }.name in V8 / FF
+	  if (DEFAULT == VALUES && nativeIterator && nativeIterator.name !== VALUES) {
+	    INCORRECT_VALUES_NAME = true;
+	    defaultIterator = function values() { return nativeIterator.call(this); };
+	  }
 
-	var $isNaN = Number.isNaN || function (a) { return a !== a; };
+	  // define iterator
+	  if (IterablePrototype[ITERATOR$7] !== defaultIterator) {
+	    createNonEnumerableProperty$8(IterablePrototype, ITERATOR$7, defaultIterator);
+	  }
+	  Iterators$3[NAME] = defaultIterator;
 
-	var _isFinite = Number.isFinite || function (x) { return typeof x === 'number' && !$isNaN(x) && x !== Infinity && x !== -Infinity; };
+	  // export additional methods
+	  if (DEFAULT) {
+	    methods = {
+	      values: getIterationMethod(VALUES),
+	      keys: IS_SET ? defaultIterator : getIterationMethod(KEYS),
+	      entries: getIterationMethod(ENTRIES)
+	    };
+	    if (FORCED) for (KEY in methods) {
+	      if (BUGGY_SAFARI_ITERATORS || INCORRECT_VALUES_NAME || !(KEY in IterablePrototype)) {
+	        redefine$d(IterablePrototype, KEY, methods[KEY]);
+	      }
+	    } else $$15({ target: NAME, proto: true, forced: BUGGY_SAFARI_ITERATORS || INCORRECT_VALUES_NAME }, methods);
+	  }
+
+	  return methods;
+	};
+
+	var toIndexedObject$7 = toIndexedObject$b;
+	var addToUnscopables$4 = addToUnscopables$5;
+	var Iterators$2 = iterators;
+	var InternalStateModule$8 = internalState;
+	var defineIterator$2 = defineIterator$3;
+
+	var ARRAY_ITERATOR = 'Array Iterator';
+	var setInternalState$8 = InternalStateModule$8.set;
+	var getInternalState$6 = InternalStateModule$8.getterFor(ARRAY_ITERATOR);
+
+	// `Array.prototype.entries` method
+	// https://tc39.es/ecma262/#sec-array.prototype.entries
+	// `Array.prototype.keys` method
+	// https://tc39.es/ecma262/#sec-array.prototype.keys
+	// `Array.prototype.values` method
+	// https://tc39.es/ecma262/#sec-array.prototype.values
+	// `Array.prototype[@@iterator]` method
+	// https://tc39.es/ecma262/#sec-array.prototype-@@iterator
+	// `CreateArrayIterator` internal method
+	// https://tc39.es/ecma262/#sec-createarrayiterator
+	var es_array_iterator = defineIterator$2(Array, 'Array', function (iterated, kind) {
+	  setInternalState$8(this, {
+	    type: ARRAY_ITERATOR,
+	    target: toIndexedObject$7(iterated), // target
+	    index: 0,                          // next index
+	    kind: kind                         // kind
+	  });
+	// `%ArrayIteratorPrototype%.next` method
+	// https://tc39.es/ecma262/#sec-%arrayiteratorprototype%.next
+	}, function () {
+	  var state = getInternalState$6(this);
+	  var target = state.target;
+	  var kind = state.kind;
+	  var index = state.index++;
+	  if (!target || index >= target.length) {
+	    state.target = undefined;
+	    return { value: undefined, done: true };
+	  }
+	  if (kind == 'keys') return { value: index, done: false };
+	  if (kind == 'values') return { value: target[index], done: false };
+	  return { value: [index, target[index]], done: false };
+	}, 'values');
+
+	// argumentsList[@@iterator] is %ArrayProto_values%
+	// https://tc39.es/ecma262/#sec-createunmappedargumentsobject
+	// https://tc39.es/ecma262/#sec-createmappedargumentsobject
+	Iterators$2.Arguments = Iterators$2.Array;
+
+	// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+	addToUnscopables$4('keys');
+	addToUnscopables$4('values');
+	addToUnscopables$4('entries');
+
+	var wellKnownSymbol$m = wellKnownSymbol$s;
+
+	var TO_STRING_TAG$3 = wellKnownSymbol$m('toStringTag');
+	var test$2 = {};
+
+	test$2[TO_STRING_TAG$3] = 'z';
+
+	var toStringTagSupport = String(test$2) === '[object z]';
+
+	var TO_STRING_TAG_SUPPORT$2 = toStringTagSupport;
+	var classofRaw = classofRaw$1;
+	var wellKnownSymbol$l = wellKnownSymbol$s;
+
+	var TO_STRING_TAG$2 = wellKnownSymbol$l('toStringTag');
+	// ES3 wrong here
+	var CORRECT_ARGUMENTS = classofRaw(function () { return arguments; }()) == 'Arguments';
+
+	// fallback for IE11 Script Access Denied error
+	var tryGet = function (it, key) {
+	  try {
+	    return it[key];
+	  } catch (error) { /* empty */ }
+	};
+
+	// getting tag from ES6+ `Object.prototype.toString`
+	var classof$b = TO_STRING_TAG_SUPPORT$2 ? classofRaw : function (it) {
+	  var O, tag, result;
+	  return it === undefined ? 'Undefined' : it === null ? 'Null'
+	    // @@toStringTag case
+	    : typeof (tag = tryGet(O = Object(it), TO_STRING_TAG$2)) == 'string' ? tag
+	    // builtinTag case
+	    : CORRECT_ARGUMENTS ? classofRaw(O)
+	    // ES3 arguments fallback
+	    : (result = classofRaw(O)) == 'Object' && typeof O.callee == 'function' ? 'Arguments' : result;
+	};
+
+	var TO_STRING_TAG_SUPPORT$1 = toStringTagSupport;
+	var classof$a = classof$b;
+
+	// `Object.prototype.toString` method implementation
+	// https://tc39.es/ecma262/#sec-object.prototype.tostring
+	var objectToString$1 = TO_STRING_TAG_SUPPORT$1 ? {}.toString : function toString() {
+	  return '[object ' + classof$a(this) + ']';
+	};
+
+	var TO_STRING_TAG_SUPPORT = toStringTagSupport;
+	var redefine$c = redefine$g.exports;
+	var toString$1 = objectToString$1;
+
+	// `Object.prototype.toString` method
+	// https://tc39.es/ecma262/#sec-object.prototype.tostring
+	if (!TO_STRING_TAG_SUPPORT) {
+	  redefine$c(Object.prototype, 'toString', toString$1, { unsafe: true });
+	}
+
+	var toInteger$8 = toInteger$b;
+	var requireObjectCoercible$b = requireObjectCoercible$e;
+
+	// `String.prototype.{ codePointAt, at }` methods implementation
+	var createMethod$5 = function (CONVERT_TO_STRING) {
+	  return function ($this, pos) {
+	    var S = String(requireObjectCoercible$b($this));
+	    var position = toInteger$8(pos);
+	    var size = S.length;
+	    var first, second;
+	    if (position < 0 || position >= size) return CONVERT_TO_STRING ? '' : undefined;
+	    first = S.charCodeAt(position);
+	    return first < 0xD800 || first > 0xDBFF || position + 1 === size
+	      || (second = S.charCodeAt(position + 1)) < 0xDC00 || second > 0xDFFF
+	        ? CONVERT_TO_STRING ? S.charAt(position) : first
+	        : CONVERT_TO_STRING ? S.slice(position, position + 2) : (first - 0xD800 << 10) + (second - 0xDC00) + 0x10000;
+	  };
+	};
+
+	var stringMultibyte = {
+	  // `String.prototype.codePointAt` method
+	  // https://tc39.es/ecma262/#sec-string.prototype.codepointat
+	  codeAt: createMethod$5(false),
+	  // `String.prototype.at` method
+	  // https://github.com/mathiasbynens/String.prototype.at
+	  charAt: createMethod$5(true)
+	};
+
+	var charAt$1 = stringMultibyte.charAt;
+	var InternalStateModule$7 = internalState;
+	var defineIterator$1 = defineIterator$3;
+
+	var STRING_ITERATOR = 'String Iterator';
+	var setInternalState$7 = InternalStateModule$7.set;
+	var getInternalState$5 = InternalStateModule$7.getterFor(STRING_ITERATOR);
+
+	// `String.prototype[@@iterator]` method
+	// https://tc39.es/ecma262/#sec-string.prototype-@@iterator
+	defineIterator$1(String, 'String', function (iterated) {
+	  setInternalState$7(this, {
+	    type: STRING_ITERATOR,
+	    string: String(iterated),
+	    index: 0
+	  });
+	// `%StringIteratorPrototype%.next` method
+	// https://tc39.es/ecma262/#sec-%stringiteratorprototype%.next
+	}, function next() {
+	  var state = getInternalState$5(this);
+	  var string = state.string;
+	  var index = state.index;
+	  var point;
+	  if (index >= string.length) return { value: undefined, done: true };
+	  point = charAt$1(string, index);
+	  state.index += point.length;
+	  return { value: point, done: false };
+	});
 
-	var sign$1 = function sign(number) {
-		return number >= 0 ? 1 : -1;
-	};
+	// iterable DOM collections
+	// flag - `iterable` interface - 'entries', 'keys', 'values', 'forEach' methods
+	var domIterables = {
+	  CSSRuleList: 0,
+	  CSSStyleDeclaration: 0,
+	  CSSValueList: 0,
+	  ClientRectList: 0,
+	  DOMRectList: 0,
+	  DOMStringList: 0,
+	  DOMTokenList: 1,
+	  DataTransferItemList: 0,
+	  FileList: 0,
+	  HTMLAllCollection: 0,
+	  HTMLCollection: 0,
+	  HTMLFormElement: 0,
+	  HTMLSelectElement: 0,
+	  MediaList: 0,
+	  MimeTypeArray: 0,
+	  NamedNodeMap: 0,
+	  NodeList: 1,
+	  PaintRequestList: 0,
+	  Plugin: 0,
+	  PluginArray: 0,
+	  SVGLengthList: 0,
+	  SVGNumberList: 0,
+	  SVGPathSegList: 0,
+	  SVGPointList: 0,
+	  SVGStringList: 0,
+	  SVGTransformList: 0,
+	  SourceBufferList: 0,
+	  StyleSheetList: 0,
+	  TextTrackCueList: 0,
+	  TextTrackList: 0,
+	  TouchList: 0
+	};
+
+	var global$t = global$F;
+	var DOMIterables$1 = domIterables;
+	var ArrayIteratorMethods = es_array_iterator;
+	var createNonEnumerableProperty$7 = createNonEnumerableProperty$e;
+	var wellKnownSymbol$k = wellKnownSymbol$s;
+
+	var ITERATOR$6 = wellKnownSymbol$k('iterator');
+	var TO_STRING_TAG$1 = wellKnownSymbol$k('toStringTag');
+	var ArrayValues = ArrayIteratorMethods.values;
+
+	for (var COLLECTION_NAME$1 in DOMIterables$1) {
+	  var Collection$1 = global$t[COLLECTION_NAME$1];
+	  var CollectionPrototype$1 = Collection$1 && Collection$1.prototype;
+	  if (CollectionPrototype$1) {
+	    // some Chrome versions have non-configurable methods on DOMTokenList
+	    if (CollectionPrototype$1[ITERATOR$6] !== ArrayValues) try {
+	      createNonEnumerableProperty$7(CollectionPrototype$1, ITERATOR$6, ArrayValues);
+	    } catch (error) {
+	      CollectionPrototype$1[ITERATOR$6] = ArrayValues;
+	    }
+	    if (!CollectionPrototype$1[TO_STRING_TAG$1]) {
+	      createNonEnumerableProperty$7(CollectionPrototype$1, TO_STRING_TAG$1, COLLECTION_NAME$1);
+	    }
+	    if (DOMIterables$1[COLLECTION_NAME$1]) for (var METHOD_NAME in ArrayIteratorMethods) {
+	      // some Chrome versions have non-configurable methods on DOMTokenList
+	      if (CollectionPrototype$1[METHOD_NAME] !== ArrayIteratorMethods[METHOD_NAME]) try {
+	        createNonEnumerableProperty$7(CollectionPrototype$1, METHOD_NAME, ArrayIteratorMethods[METHOD_NAME]);
+	      } catch (error) {
+	        CollectionPrototype$1[METHOD_NAME] = ArrayIteratorMethods[METHOD_NAME];
+	      }
+	    }
+	  }
+	}
 
-	var $Math$1 = GetIntrinsic('%Math%');
+	var classof$9 = classofRaw$1;
 
+	// `IsArray` abstract operation
+	// https://tc39.es/ecma262/#sec-isarray
+	// eslint-disable-next-line es/no-array-isarray -- safe
+	var isArray$6 = Array.isArray || function isArray(arg) {
+	  return classof$9(arg) == 'Array';
+	};
 
+	var objectGetOwnPropertyNamesExternal = {};
 
+	/* eslint-disable es/no-object-getownpropertynames -- safe */
 
+	var toIndexedObject$6 = toIndexedObject$b;
+	var $getOwnPropertyNames$1 = objectGetOwnPropertyNames.f;
 
+	var toString = {}.toString;
 
-	var $floor = $Math$1.floor;
-	var $abs = $Math$1.abs;
+	var windowNames = typeof window == 'object' && window && Object.getOwnPropertyNames
+	  ? Object.getOwnPropertyNames(window) : [];
 
-	// http://www.ecma-international.org/ecma-262/5.1/#sec-9.4
+	var getWindowNames = function (it) {
+	  try {
+	    return $getOwnPropertyNames$1(it);
+	  } catch (error) {
+	    return windowNames.slice();
+	  }
+	};
+
+	// fallback for IE11 buggy Object.getOwnPropertyNames with iframe and window
+	objectGetOwnPropertyNamesExternal.f = function getOwnPropertyNames(it) {
+	  return windowNames && toString.call(it) == '[object Window]'
+	    ? getWindowNames(it)
+	    : $getOwnPropertyNames$1(toIndexedObject$6(it));
+	};
+
+	var aFunction$9 = function (it) {
+	  if (typeof it != 'function') {
+	    throw TypeError(String(it) + ' is not a function');
+	  } return it;
+	};
+
+	var aFunction$8 = aFunction$9;
+
+	// optional / simple context binding
+	var functionBindContext = function (fn, that, length) {
+	  aFunction$8(fn);
+	  if (that === undefined) return fn;
+	  switch (length) {
+	    case 0: return function () {
+	      return fn.call(that);
+	    };
+	    case 1: return function (a) {
+	      return fn.call(that, a);
+	    };
+	    case 2: return function (a, b) {
+	      return fn.call(that, a, b);
+	    };
+	    case 3: return function (a, b, c) {
+	      return fn.call(that, a, b, c);
+	    };
+	  }
+	  return function (/* ...args */) {
+	    return fn.apply(that, arguments);
+	  };
+	};
+
+	var isObject$l = isObject$r;
+	var isArray$5 = isArray$6;
+	var wellKnownSymbol$j = wellKnownSymbol$s;
+
+	var SPECIES$6 = wellKnownSymbol$j('species');
+
+	// `ArraySpeciesCreate` abstract operation
+	// https://tc39.es/ecma262/#sec-arrayspeciescreate
+	var arraySpeciesCreate$3 = function (originalArray, length) {
+	  var C;
+	  if (isArray$5(originalArray)) {
+	    C = originalArray.constructor;
+	    // cross-realm fallback
+	    if (typeof C == 'function' && (C === Array || isArray$5(C.prototype))) C = undefined;
+	    else if (isObject$l(C)) {
+	      C = C[SPECIES$6];
+	      if (C === null) C = undefined;
+	    }
+	  } return new (C === undefined ? Array : C)(length === 0 ? 0 : length);
+	};
+
+	var bind$b = functionBindContext;
+	var IndexedObject$3 = indexedObject;
+	var toObject$f = toObject$i;
+	var toLength$o = toLength$q;
+	var arraySpeciesCreate$2 = arraySpeciesCreate$3;
+
+	var push = [].push;
+
+	// `Array.prototype.{ forEach, map, filter, some, every, find, findIndex, filterOut }` methods implementation
+	var createMethod$4 = function (TYPE) {
+	  var IS_MAP = TYPE == 1;
+	  var IS_FILTER = TYPE == 2;
+	  var IS_SOME = TYPE == 3;
+	  var IS_EVERY = TYPE == 4;
+	  var IS_FIND_INDEX = TYPE == 6;
+	  var IS_FILTER_OUT = TYPE == 7;
+	  var NO_HOLES = TYPE == 5 || IS_FIND_INDEX;
+	  return function ($this, callbackfn, that, specificCreate) {
+	    var O = toObject$f($this);
+	    var self = IndexedObject$3(O);
+	    var boundFunction = bind$b(callbackfn, that, 3);
+	    var length = toLength$o(self.length);
+	    var index = 0;
+	    var create = specificCreate || arraySpeciesCreate$2;
+	    var target = IS_MAP ? create($this, length) : IS_FILTER || IS_FILTER_OUT ? create($this, 0) : undefined;
+	    var value, result;
+	    for (;length > index; index++) if (NO_HOLES || index in self) {
+	      value = self[index];
+	      result = boundFunction(value, index, O);
+	      if (TYPE) {
+	        if (IS_MAP) target[index] = result; // map
+	        else if (result) switch (TYPE) {
+	          case 3: return true;              // some
+	          case 5: return value;             // find
+	          case 6: return index;             // findIndex
+	          case 2: push.call(target, value); // filter
+	        } else switch (TYPE) {
+	          case 4: return false;             // every
+	          case 7: push.call(target, value); // filterOut
+	        }
+	      }
+	    }
+	    return IS_FIND_INDEX ? -1 : IS_SOME || IS_EVERY ? IS_EVERY : target;
+	  };
+	};
+
+	var arrayIteration = {
+	  // `Array.prototype.forEach` method
+	  // https://tc39.es/ecma262/#sec-array.prototype.foreach
+	  forEach: createMethod$4(0),
+	  // `Array.prototype.map` method
+	  // https://tc39.es/ecma262/#sec-array.prototype.map
+	  map: createMethod$4(1),
+	  // `Array.prototype.filter` method
+	  // https://tc39.es/ecma262/#sec-array.prototype.filter
+	  filter: createMethod$4(2),
+	  // `Array.prototype.some` method
+	  // https://tc39.es/ecma262/#sec-array.prototype.some
+	  some: createMethod$4(3),
+	  // `Array.prototype.every` method
+	  // https://tc39.es/ecma262/#sec-array.prototype.every
+	  every: createMethod$4(4),
+	  // `Array.prototype.find` method
+	  // https://tc39.es/ecma262/#sec-array.prototype.find
+	  find: createMethod$4(5),
+	  // `Array.prototype.findIndex` method
+	  // https://tc39.es/ecma262/#sec-array.prototype.findIndex
+	  findIndex: createMethod$4(6),
+	  // `Array.prototype.filterOut` method
+	  // https://github.com/tc39/proposal-array-filtering
+	  filterOut: createMethod$4(7)
+	};
+
+	var $$14 = _export;
+	var global$s = global$F;
+	var getBuiltIn$5 = getBuiltIn$9;
+	var DESCRIPTORS$h = descriptors;
+	var NATIVE_SYMBOL = nativeSymbol;
+	var USE_SYMBOL_AS_UID = useSymbolAsUid;
+	var fails$F = fails$N;
+	var has$8 = has$j;
+	var isArray$4 = isArray$6;
+	var isObject$k = isObject$r;
+	var anObject$g = anObject$m;
+	var toObject$e = toObject$i;
+	var toIndexedObject$5 = toIndexedObject$b;
+	var toPrimitive$4 = toPrimitive$7;
+	var createPropertyDescriptor$3 = createPropertyDescriptor$7;
+	var nativeObjectCreate = objectCreate;
+	var objectKeys$2 = objectKeys$4;
+	var getOwnPropertyNamesModule = objectGetOwnPropertyNames;
+	var getOwnPropertyNamesExternal = objectGetOwnPropertyNamesExternal;
+	var getOwnPropertySymbolsModule$1 = objectGetOwnPropertySymbols;
+	var getOwnPropertyDescriptorModule$2 = objectGetOwnPropertyDescriptor;
+	var definePropertyModule$3 = objectDefineProperty;
+	var propertyIsEnumerableModule$1 = objectPropertyIsEnumerable;
+	var createNonEnumerableProperty$6 = createNonEnumerableProperty$e;
+	var redefine$b = redefine$g.exports;
+	var shared$1 = shared$5.exports;
+	var sharedKey = sharedKey$4;
+	var hiddenKeys$1 = hiddenKeys$6;
+	var uid$2 = uid$5;
+	var wellKnownSymbol$i = wellKnownSymbol$s;
+	var wrappedWellKnownSymbolModule = wellKnownSymbolWrapped;
+	var defineWellKnownSymbol$2 = defineWellKnownSymbol$4;
+	var setToStringTag$7 = setToStringTag$a;
+	var InternalStateModule$6 = internalState;
+	var $forEach$2 = arrayIteration.forEach;
+
+	var HIDDEN = sharedKey('hidden');
+	var SYMBOL = 'Symbol';
+	var PROTOTYPE$1 = 'prototype';
+	var TO_PRIMITIVE = wellKnownSymbol$i('toPrimitive');
+	var setInternalState$6 = InternalStateModule$6.set;
+	var getInternalState$4 = InternalStateModule$6.getterFor(SYMBOL);
+	var ObjectPrototype$2 = Object[PROTOTYPE$1];
+	var $Symbol = global$s.Symbol;
+	var $stringify = getBuiltIn$5('JSON', 'stringify');
+	var nativeGetOwnPropertyDescriptor$2 = getOwnPropertyDescriptorModule$2.f;
+	var nativeDefineProperty$1 = definePropertyModule$3.f;
+	var nativeGetOwnPropertyNames = getOwnPropertyNamesExternal.f;
+	var nativePropertyIsEnumerable = propertyIsEnumerableModule$1.f;
+	var AllSymbols = shared$1('symbols');
+	var ObjectPrototypeSymbols = shared$1('op-symbols');
+	var StringToSymbolRegistry = shared$1('string-to-symbol-registry');
+	var SymbolToStringRegistry = shared$1('symbol-to-string-registry');
+	var WellKnownSymbolsStore = shared$1('wks');
+	var QObject = global$s.QObject;
+	// Don't use setters in Qt Script, https://github.com/zloirock/core-js/issues/173
+	var USE_SETTER = !QObject || !QObject[PROTOTYPE$1] || !QObject[PROTOTYPE$1].findChild;
+
+	// fallback for old Android, https://code.google.com/p/v8/issues/detail?id=687
+	var setSymbolDescriptor = DESCRIPTORS$h && fails$F(function () {
+	  return nativeObjectCreate(nativeDefineProperty$1({}, 'a', {
+	    get: function () { return nativeDefineProperty$1(this, 'a', { value: 7 }).a; }
+	  })).a != 7;
+	}) ? function (O, P, Attributes) {
+	  var ObjectPrototypeDescriptor = nativeGetOwnPropertyDescriptor$2(ObjectPrototype$2, P);
+	  if (ObjectPrototypeDescriptor) delete ObjectPrototype$2[P];
+	  nativeDefineProperty$1(O, P, Attributes);
+	  if (ObjectPrototypeDescriptor && O !== ObjectPrototype$2) {
+	    nativeDefineProperty$1(ObjectPrototype$2, P, ObjectPrototypeDescriptor);
+	  }
+	} : nativeDefineProperty$1;
+
+	var wrap$2 = function (tag, description) {
+	  var symbol = AllSymbols[tag] = nativeObjectCreate($Symbol[PROTOTYPE$1]);
+	  setInternalState$6(symbol, {
+	    type: SYMBOL,
+	    tag: tag,
+	    description: description
+	  });
+	  if (!DESCRIPTORS$h) symbol.description = description;
+	  return symbol;
+	};
 
-	var ToInteger = function ToInteger(value) {
-		var number = ToNumber(value);
-		if (_isNaN(number)) { return 0; }
-		if (number === 0 || !_isFinite(number)) { return number; }
-		return sign$1(number) * $floor($abs(number));
+	var isSymbol$1 = USE_SYMBOL_AS_UID ? function (it) {
+	  return typeof it == 'symbol';
+	} : function (it) {
+	  return Object(it) instanceof $Symbol;
 	};
 
-	var $apply = GetIntrinsic('%Function.prototype.apply%');
-	var $call = GetIntrinsic('%Function.prototype.call%');
-	var $reflectApply = GetIntrinsic('%Reflect.apply%', true) || functionBind.call($call, $apply);
+	var $defineProperty = function defineProperty(O, P, Attributes) {
+	  if (O === ObjectPrototype$2) $defineProperty(ObjectPrototypeSymbols, P, Attributes);
+	  anObject$g(O);
+	  var key = toPrimitive$4(P, true);
+	  anObject$g(Attributes);
+	  if (has$8(AllSymbols, key)) {
+	    if (!Attributes.enumerable) {
+	      if (!has$8(O, HIDDEN)) nativeDefineProperty$1(O, HIDDEN, createPropertyDescriptor$3(1, {}));
+	      O[HIDDEN][key] = true;
+	    } else {
+	      if (has$8(O, HIDDEN) && O[HIDDEN][key]) O[HIDDEN][key] = false;
+	      Attributes = nativeObjectCreate(Attributes, { enumerable: createPropertyDescriptor$3(0, false) });
+	    } return setSymbolDescriptor(O, key, Attributes);
+	  } return nativeDefineProperty$1(O, key, Attributes);
+	};
+
+	var $defineProperties = function defineProperties(O, Properties) {
+	  anObject$g(O);
+	  var properties = toIndexedObject$5(Properties);
+	  var keys = objectKeys$2(properties).concat($getOwnPropertySymbols(properties));
+	  $forEach$2(keys, function (key) {
+	    if (!DESCRIPTORS$h || $propertyIsEnumerable.call(properties, key)) $defineProperty(O, key, properties[key]);
+	  });
+	  return O;
+	};
 
-	var callBind = function callBind() {
-		return $reflectApply(functionBind, $call, arguments);
+	var $create = function create(O, Properties) {
+	  return Properties === undefined ? nativeObjectCreate(O) : $defineProperties(nativeObjectCreate(O), Properties);
 	};
 
-	var apply = function applyBind() {
-		return $reflectApply(functionBind, $apply, arguments);
+	var $propertyIsEnumerable = function propertyIsEnumerable(V) {
+	  var P = toPrimitive$4(V, true);
+	  var enumerable = nativePropertyIsEnumerable.call(this, P);
+	  if (this === ObjectPrototype$2 && has$8(AllSymbols, P) && !has$8(ObjectPrototypeSymbols, P)) return false;
+	  return enumerable || !has$8(this, P) || !has$8(AllSymbols, P) || has$8(this, HIDDEN) && this[HIDDEN][P] ? enumerable : true;
 	};
-	callBind.apply = apply;
 
-	var $indexOf = callBind(GetIntrinsic('String.prototype.indexOf'));
+	var $getOwnPropertyDescriptor = function getOwnPropertyDescriptor(O, P) {
+	  var it = toIndexedObject$5(O);
+	  var key = toPrimitive$4(P, true);
+	  if (it === ObjectPrototype$2 && has$8(AllSymbols, key) && !has$8(ObjectPrototypeSymbols, key)) return;
+	  var descriptor = nativeGetOwnPropertyDescriptor$2(it, key);
+	  if (descriptor && has$8(AllSymbols, key) && !(has$8(it, HIDDEN) && it[HIDDEN][key])) {
+	    descriptor.enumerable = true;
+	  }
+	  return descriptor;
+	};
 
-	var callBound = function callBoundIntrinsic(name, allowMissing) {
-		var intrinsic = GetIntrinsic(name, !!allowMissing);
-		if (typeof intrinsic === 'function' && $indexOf(name, '.prototype.')) {
-			return callBind(intrinsic);
-		}
-		return intrinsic;
+	var $getOwnPropertyNames = function getOwnPropertyNames(O) {
+	  var names = nativeGetOwnPropertyNames(toIndexedObject$5(O));
+	  var result = [];
+	  $forEach$2(names, function (key) {
+	    if (!has$8(AllSymbols, key) && !has$8(hiddenKeys$1, key)) result.push(key);
+	  });
+	  return result;
 	};
 
-	var $test = GetIntrinsic('RegExp.prototype.test');
+	var $getOwnPropertySymbols = function getOwnPropertySymbols(O) {
+	  var IS_OBJECT_PROTOTYPE = O === ObjectPrototype$2;
+	  var names = nativeGetOwnPropertyNames(IS_OBJECT_PROTOTYPE ? ObjectPrototypeSymbols : toIndexedObject$5(O));
+	  var result = [];
+	  $forEach$2(names, function (key) {
+	    if (has$8(AllSymbols, key) && (!IS_OBJECT_PROTOTYPE || has$8(ObjectPrototype$2, key))) {
+	      result.push(AllSymbols[key]);
+	    }
+	  });
+	  return result;
+	};
 
+	// `Symbol` constructor
+	// https://tc39.es/ecma262/#sec-symbol-constructor
+	if (!NATIVE_SYMBOL) {
+	  $Symbol = function Symbol() {
+	    if (this instanceof $Symbol) throw TypeError('Symbol is not a constructor');
+	    var description = !arguments.length || arguments[0] === undefined ? undefined : String(arguments[0]);
+	    var tag = uid$2(description);
+	    var setter = function (value) {
+	      if (this === ObjectPrototype$2) setter.call(ObjectPrototypeSymbols, value);
+	      if (has$8(this, HIDDEN) && has$8(this[HIDDEN], tag)) this[HIDDEN][tag] = false;
+	      setSymbolDescriptor(this, tag, createPropertyDescriptor$3(1, value));
+	    };
+	    if (DESCRIPTORS$h && USE_SETTER) setSymbolDescriptor(ObjectPrototype$2, tag, { configurable: true, set: setter });
+	    return wrap$2(tag, description);
+	  };
 
+	  redefine$b($Symbol[PROTOTYPE$1], 'toString', function toString() {
+	    return getInternalState$4(this).tag;
+	  });
 
-	var regexTester = function regexTester(regex) {
-		return callBind($test, regex);
-	};
+	  redefine$b($Symbol, 'withoutSetter', function (description) {
+	    return wrap$2(uid$2(description), description);
+	  });
 
-	var isPrimitive = function isPrimitive(value) {
-		return value === null || (typeof value !== 'function' && typeof value !== 'object');
-	};
+	  propertyIsEnumerableModule$1.f = $propertyIsEnumerable;
+	  definePropertyModule$3.f = $defineProperty;
+	  getOwnPropertyDescriptorModule$2.f = $getOwnPropertyDescriptor;
+	  getOwnPropertyNamesModule.f = getOwnPropertyNamesExternal.f = $getOwnPropertyNames;
+	  getOwnPropertySymbolsModule$1.f = $getOwnPropertySymbols;
 
-	var isPrimitive$1 = function isPrimitive(value) {
-		return value === null || (typeof value !== 'function' && typeof value !== 'object');
-	};
+	  wrappedWellKnownSymbolModule.f = function (name) {
+	    return wrap$2(wellKnownSymbol$i(name), name);
+	  };
 
-	var fnToStr = Function.prototype.toString;
-	var reflectApply = typeof Reflect === 'object' && Reflect !== null && Reflect.apply;
-	var badArrayLike;
-	var isCallableMarker;
-	if (typeof reflectApply === 'function' && typeof Object.defineProperty === 'function') {
-		try {
-			badArrayLike = Object.defineProperty({}, 'length', {
-				get: function () {
-					throw isCallableMarker;
-				}
-			});
-			isCallableMarker = {};
-		} catch (_) {
-			reflectApply = null;
-		}
-	} else {
-		reflectApply = null;
+	  if (DESCRIPTORS$h) {
+	    // https://github.com/tc39/proposal-Symbol-description
+	    nativeDefineProperty$1($Symbol[PROTOTYPE$1], 'description', {
+	      configurable: true,
+	      get: function description() {
+	        return getInternalState$4(this).description;
+	      }
+	    });
+	    {
+	      redefine$b(ObjectPrototype$2, 'propertyIsEnumerable', $propertyIsEnumerable, { unsafe: true });
+	    }
+	  }
 	}
 
-	var constructorRegex = /^\s*class\b/;
-	var isES6ClassFn = function isES6ClassFunction(value) {
-		try {
-			var fnStr = fnToStr.call(value);
-			return constructorRegex.test(fnStr);
-		} catch (e) {
-			return false; // not a function
-		}
-	};
+	$$14({ global: true, wrap: true, forced: !NATIVE_SYMBOL, sham: !NATIVE_SYMBOL }, {
+	  Symbol: $Symbol
+	});
 
-	var tryFunctionObject = function tryFunctionToStr(value) {
-		try {
-			if (isES6ClassFn(value)) { return false; }
-			fnToStr.call(value);
-			return true;
-		} catch (e) {
-			return false;
-		}
-	};
-	var toStr$4 = Object.prototype.toString;
-	var fnClass = '[object Function]';
-	var genClass = '[object GeneratorFunction]';
-	var hasToStringTag = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';
-
-	var isCallable = reflectApply
-		? function isCallable(value) {
-			if (!value) { return false; }
-			if (typeof value !== 'function' && typeof value !== 'object') { return false; }
-			if (typeof value === 'function' && !value.prototype) { return true; }
-			try {
-				reflectApply(value, null, badArrayLike);
-			} catch (e) {
-				if (e !== isCallableMarker) { return false; }
-			}
-			return !isES6ClassFn(value);
-		}
-		: function isCallable(value) {
-			if (!value) { return false; }
-			if (typeof value !== 'function' && typeof value !== 'object') { return false; }
-			if (typeof value === 'function' && !value.prototype) { return true; }
-			if (hasToStringTag) { return tryFunctionObject(value); }
-			if (isES6ClassFn(value)) { return false; }
-			var strClass = toStr$4.call(value);
-			return strClass === fnClass || strClass === genClass;
-		};
-
-	var getDay = Date.prototype.getDay;
-	var tryDateObject = function tryDateGetDayCall(value) {
-		try {
-			getDay.call(value);
-			return true;
-		} catch (e) {
-			return false;
-		}
-	};
+	$forEach$2(objectKeys$2(WellKnownSymbolsStore), function (name) {
+	  defineWellKnownSymbol$2(name);
+	});
 
-	var toStr$5 = Object.prototype.toString;
-	var dateClass = '[object Date]';
-	var hasToStringTag$1 = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';
+	$$14({ target: SYMBOL, stat: true, forced: !NATIVE_SYMBOL }, {
+	  // `Symbol.for` method
+	  // https://tc39.es/ecma262/#sec-symbol.for
+	  'for': function (key) {
+	    var string = String(key);
+	    if (has$8(StringToSymbolRegistry, string)) return StringToSymbolRegistry[string];
+	    var symbol = $Symbol(string);
+	    StringToSymbolRegistry[string] = symbol;
+	    SymbolToStringRegistry[symbol] = string;
+	    return symbol;
+	  },
+	  // `Symbol.keyFor` method
+	  // https://tc39.es/ecma262/#sec-symbol.keyfor
+	  keyFor: function keyFor(sym) {
+	    if (!isSymbol$1(sym)) throw TypeError(sym + ' is not a symbol');
+	    if (has$8(SymbolToStringRegistry, sym)) return SymbolToStringRegistry[sym];
+	  },
+	  useSetter: function () { USE_SETTER = true; },
+	  useSimple: function () { USE_SETTER = false; }
+	});
 
-	var isDateObject = function isDateObject(value) {
-		if (typeof value !== 'object' || value === null) {
-			return false;
-		}
-		return hasToStringTag$1 ? tryDateObject(value) : toStr$5.call(value) === dateClass;
-	};
+	$$14({ target: 'Object', stat: true, forced: !NATIVE_SYMBOL, sham: !DESCRIPTORS$h }, {
+	  // `Object.create` method
+	  // https://tc39.es/ecma262/#sec-object.create
+	  create: $create,
+	  // `Object.defineProperty` method
+	  // https://tc39.es/ecma262/#sec-object.defineproperty
+	  defineProperty: $defineProperty,
+	  // `Object.defineProperties` method
+	  // https://tc39.es/ecma262/#sec-object.defineproperties
+	  defineProperties: $defineProperties,
+	  // `Object.getOwnPropertyDescriptor` method
+	  // https://tc39.es/ecma262/#sec-object.getownpropertydescriptors
+	  getOwnPropertyDescriptor: $getOwnPropertyDescriptor
+	});
 
-	var isSymbol$2 = createCommonjsModule(function (module) {
-
-	var toStr = Object.prototype.toString;
-	var hasSymbols = hasSymbols$1();
-
-	if (hasSymbols) {
-		var symToStr = Symbol.prototype.toString;
-		var symStringRegex = /^Symbol\(.*\)$/;
-		var isSymbolObject = function isRealSymbolObject(value) {
-			if (typeof value.valueOf() !== 'symbol') {
-				return false;
-			}
-			return symStringRegex.test(symToStr.call(value));
-		};
-
-		module.exports = function isSymbol(value) {
-			if (typeof value === 'symbol') {
-				return true;
-			}
-			if (toStr.call(value) !== '[object Symbol]') {
-				return false;
-			}
-			try {
-				return isSymbolObject(value);
-			} catch (e) {
-				return false;
-			}
-		};
-	} else {
+	$$14({ target: 'Object', stat: true, forced: !NATIVE_SYMBOL }, {
+	  // `Object.getOwnPropertyNames` method
+	  // https://tc39.es/ecma262/#sec-object.getownpropertynames
+	  getOwnPropertyNames: $getOwnPropertyNames,
+	  // `Object.getOwnPropertySymbols` method
+	  // https://tc39.es/ecma262/#sec-object.getownpropertysymbols
+	  getOwnPropertySymbols: $getOwnPropertySymbols
+	});
 
-		module.exports = function isSymbol(value) {
-			// this environment does not support Symbols.
-			return false ;
-		};
-	}
+	// Chrome 38 and 39 `Object.getOwnPropertySymbols` fails on primitives
+	// https://bugs.chromium.org/p/v8/issues/detail?id=3443
+	$$14({ target: 'Object', stat: true, forced: fails$F(function () { getOwnPropertySymbolsModule$1.f(1); }) }, {
+	  getOwnPropertySymbols: function getOwnPropertySymbols(it) {
+	    return getOwnPropertySymbolsModule$1.f(toObject$e(it));
+	  }
 	});
 
-	var hasSymbols$3 = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol';
+	// `JSON.stringify` method behavior with symbols
+	// https://tc39.es/ecma262/#sec-json.stringify
+	if ($stringify) {
+	  var FORCED_JSON_STRINGIFY = !NATIVE_SYMBOL || fails$F(function () {
+	    var symbol = $Symbol();
+	    // MS Edge converts symbol values to JSON as {}
+	    return $stringify([symbol]) != '[null]'
+	      // WebKit converts symbol values to JSON as null
+	      || $stringify({ a: symbol }) != '{}'
+	      // V8 throws on boxed symbols
+	      || $stringify(Object(symbol)) != '{}';
+	  });
 
+	  $$14({ target: 'JSON', stat: true, forced: FORCED_JSON_STRINGIFY }, {
+	    // eslint-disable-next-line no-unused-vars -- required for `.length`
+	    stringify: function stringify(it, replacer, space) {
+	      var args = [it];
+	      var index = 1;
+	      var $replacer;
+	      while (arguments.length > index) args.push(arguments[index++]);
+	      $replacer = replacer;
+	      if (!isObject$k(replacer) && it === undefined || isSymbol$1(it)) return; // IE8 returns string on undefined
+	      if (!isArray$4(replacer)) replacer = function (key, value) {
+	        if (typeof $replacer == 'function') value = $replacer.call(this, key, value);
+	        if (!isSymbol$1(value)) return value;
+	      };
+	      args[1] = replacer;
+	      return $stringify.apply(null, args);
+	    }
+	  });
+	}
 
+	// `Symbol.prototype[@@toPrimitive]` method
+	// https://tc39.es/ecma262/#sec-symbol.prototype-@@toprimitive
+	if (!$Symbol[PROTOTYPE$1][TO_PRIMITIVE]) {
+	  createNonEnumerableProperty$6($Symbol[PROTOTYPE$1], TO_PRIMITIVE, $Symbol[PROTOTYPE$1].valueOf);
+	}
+	// `Symbol.prototype[@@toStringTag]` property
+	// https://tc39.es/ecma262/#sec-symbol.prototype-@@tostringtag
+	setToStringTag$7($Symbol, SYMBOL);
+
+	hiddenKeys$1[HIDDEN] = true;
+
+	var $$13 = _export;
+	var DESCRIPTORS$g = descriptors;
+	var global$r = global$F;
+	var has$7 = has$j;
+	var isObject$j = isObject$r;
+	var defineProperty$8 = objectDefineProperty.f;
+	var copyConstructorProperties = copyConstructorProperties$2;
+
+	var NativeSymbol = global$r.Symbol;
+
+	if (DESCRIPTORS$g && typeof NativeSymbol == 'function' && (!('description' in NativeSymbol.prototype) ||
+	  // Safari 12 bug
+	  NativeSymbol().description !== undefined
+	)) {
+	  var EmptyStringDescriptionStore = {};
+	  // wrap Symbol constructor for correct work with undefined description
+	  var SymbolWrapper = function Symbol() {
+	    var description = arguments.length < 1 || arguments[0] === undefined ? undefined : String(arguments[0]);
+	    var result = this instanceof SymbolWrapper
+	      ? new NativeSymbol(description)
+	      // in Edge 13, String(Symbol(undefined)) === 'Symbol(undefined)'
+	      : description === undefined ? NativeSymbol() : NativeSymbol(description);
+	    if (description === '') EmptyStringDescriptionStore[result] = true;
+	    return result;
+	  };
+	  copyConstructorProperties(SymbolWrapper, NativeSymbol);
+	  var symbolPrototype = SymbolWrapper.prototype = NativeSymbol.prototype;
+	  symbolPrototype.constructor = SymbolWrapper;
 
+	  var symbolToString = symbolPrototype.toString;
+	  var native = String(NativeSymbol('test')) == 'Symbol(test)';
+	  var regexp = /^Symbol\((.*)\)[^)]+$/;
+	  defineProperty$8(symbolPrototype, 'description', {
+	    configurable: true,
+	    get: function description() {
+	      var symbol = isObject$j(this) ? this.valueOf() : this;
+	      var string = symbolToString.call(symbol);
+	      if (has$7(EmptyStringDescriptionStore, symbol)) return '';
+	      var desc = native ? string.slice(7, -1) : string.replace(regexp, '$1');
+	      return desc === '' ? undefined : desc;
+	    }
+	  });
 
+	  $$13({ global: true, forced: true }, {
+	    Symbol: SymbolWrapper
+	  });
+	}
 
+	// eslint-disable-next-line es/no-typed-arrays -- safe
+	var arrayBufferNative = typeof ArrayBuffer !== 'undefined' && typeof DataView !== 'undefined';
 
-	var ordinaryToPrimitive = function OrdinaryToPrimitive(O, hint) {
-		if (typeof O === 'undefined' || O === null) {
-			throw new TypeError('Cannot call method on ' + O);
-		}
-		if (typeof hint !== 'string' || (hint !== 'number' && hint !== 'string')) {
-			throw new TypeError('hint must be "string" or "number"');
-		}
-		var methodNames = hint === 'string' ? ['toString', 'valueOf'] : ['valueOf', 'toString'];
-		var method, result, i;
-		for (i = 0; i < methodNames.length; ++i) {
-			method = O[methodNames[i]];
-			if (isCallable(method)) {
-				result = method.call(O);
-				if (isPrimitive$1(result)) {
-					return result;
-				}
-			}
-		}
-		throw new TypeError('No default value');
-	};
+	var redefine$a = redefine$g.exports;
 
-	var GetMethod = function GetMethod(O, P) {
-		var func = O[P];
-		if (func !== null && typeof func !== 'undefined') {
-			if (!isCallable(func)) {
-				throw new TypeError(func + ' returned for property ' + P + ' of object ' + O + ' is not a function');
-			}
-			return func;
-		}
-		return void 0;
+	var redefineAll$4 = function (target, src, options) {
+	  for (var key in src) redefine$a(target, key, src[key], options);
+	  return target;
 	};
 
-	// http://www.ecma-international.org/ecma-262/6.0/#sec-toprimitive
-	var es2015 = function ToPrimitive(input) {
-		if (isPrimitive$1(input)) {
-			return input;
-		}
-		var hint = 'default';
-		if (arguments.length > 1) {
-			if (arguments[1] === String) {
-				hint = 'string';
-			} else if (arguments[1] === Number) {
-				hint = 'number';
-			}
-		}
-
-		var exoticToPrim;
-		if (hasSymbols$3) {
-			if (Symbol.toPrimitive) {
-				exoticToPrim = GetMethod(input, Symbol.toPrimitive);
-			} else if (isSymbol$2(input)) {
-				exoticToPrim = Symbol.prototype.valueOf;
-			}
-		}
-		if (typeof exoticToPrim !== 'undefined') {
-			var result = exoticToPrim.call(input, hint);
-			if (isPrimitive$1(result)) {
-				return result;
-			}
-			throw new TypeError('unable to convert exotic object to primitive');
-		}
-		if (hint === 'default' && (isDateObject(input) || isSymbol$2(input))) {
-			hint = 'string';
-		}
-		return ordinaryToPrimitive(input, hint === 'default' ? 'number' : hint);
+	var anInstance$7 = function (it, Constructor, name) {
+	  if (!(it instanceof Constructor)) {
+	    throw TypeError('Incorrect ' + (name ? name + ' ' : '') + 'invocation');
+	  } return it;
 	};
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-toprimitive
+	var toInteger$7 = toInteger$b;
+	var toLength$n = toLength$q;
 
-	var ToPrimitive = function ToPrimitive(input) {
-		if (arguments.length > 1) {
-			return es2015(input, arguments[1]);
-		}
-		return es2015(input);
+	// `ToIndex` abstract operation
+	// https://tc39.es/ecma262/#sec-toindex
+	var toIndex$2 = function (it) {
+	  if (it === undefined) return 0;
+	  var number = toInteger$7(it);
+	  var length = toLength$n(number);
+	  if (number !== length) throw RangeError('Wrong length or index');
+	  return length;
 	};
 
-	var $TypeError$2 = GetIntrinsic('%TypeError%');
-	var $Number$1 = GetIntrinsic('%Number%');
-	var $RegExp = GetIntrinsic('%RegExp%');
-	var $parseInteger = GetIntrinsic('%parseInt%');
-
+	// IEEE754 conversions based on https://github.com/feross/ieee754
+	var abs$4 = Math.abs;
+	var pow$2 = Math.pow;
+	var floor$6 = Math.floor;
+	var log$2 = Math.log;
+	var LN2 = Math.LN2;
 
+	var pack = function (number, mantissaLength, bytes) {
+	  var buffer = new Array(bytes);
+	  var exponentLength = bytes * 8 - mantissaLength - 1;
+	  var eMax = (1 << exponentLength) - 1;
+	  var eBias = eMax >> 1;
+	  var rt = mantissaLength === 23 ? pow$2(2, -24) - pow$2(2, -77) : 0;
+	  var sign = number < 0 || number === 0 && 1 / number < 0 ? 1 : 0;
+	  var index = 0;
+	  var exponent, mantissa, c;
+	  number = abs$4(number);
+	  // eslint-disable-next-line no-self-compare -- NaN check
+	  if (number != number || number === Infinity) {
+	    // eslint-disable-next-line no-self-compare -- NaN check
+	    mantissa = number != number ? 1 : 0;
+	    exponent = eMax;
+	  } else {
+	    exponent = floor$6(log$2(number) / LN2);
+	    if (number * (c = pow$2(2, -exponent)) < 1) {
+	      exponent--;
+	      c *= 2;
+	    }
+	    if (exponent + eBias >= 1) {
+	      number += rt / c;
+	    } else {
+	      number += rt * pow$2(2, 1 - eBias);
+	    }
+	    if (number * c >= 2) {
+	      exponent++;
+	      c /= 2;
+	    }
+	    if (exponent + eBias >= eMax) {
+	      mantissa = 0;
+	      exponent = eMax;
+	    } else if (exponent + eBias >= 1) {
+	      mantissa = (number * c - 1) * pow$2(2, mantissaLength);
+	      exponent = exponent + eBias;
+	    } else {
+	      mantissa = number * pow$2(2, eBias - 1) * pow$2(2, mantissaLength);
+	      exponent = 0;
+	    }
+	  }
+	  for (; mantissaLength >= 8; buffer[index++] = mantissa & 255, mantissa /= 256, mantissaLength -= 8);
+	  exponent = exponent << mantissaLength | mantissa;
+	  exponentLength += mantissaLength;
+	  for (; exponentLength > 0; buffer[index++] = exponent & 255, exponent /= 256, exponentLength -= 8);
+	  buffer[--index] |= sign * 128;
+	  return buffer;
+	};
 
-
-
-	var $strSlice = callBound('String.prototype.slice');
-	var isBinary = regexTester(/^0b[01]+$/i);
-	var isOctal = regexTester(/^0o[0-7]+$/i);
-	var isInvalidHexLiteral = regexTester(/^[-+]0x[0-9a-f]+$/i);
-	var nonWS = ['\u0085', '\u200b', '\ufffe'].join('');
-	var nonWSregex = new $RegExp('[' + nonWS + ']', 'g');
-	var hasNonWS = regexTester(nonWSregex);
-
-	// whitespace from: https://es5.github.io/#x15.5.4.20
-	// implementation from https://github.com/es-shims/es5-shim/blob/v3.4.0/es5-shim.js#L1304-L1324
-	var ws = [
-		'\x09\x0A\x0B\x0C\x0D\x20\xA0\u1680\u180E\u2000\u2001\u2002\u2003',
-		'\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028',
-		'\u2029\uFEFF'
-	].join('');
-	var trimRegex = new RegExp('(^[' + ws + ']+)|([' + ws + ']+$)', 'g');
-	var $replace$1 = callBound('String.prototype.replace');
-	var $trim = function (value) {
-		return $replace$1(value, trimRegex, '');
+	var unpack = function (buffer, mantissaLength) {
+	  var bytes = buffer.length;
+	  var exponentLength = bytes * 8 - mantissaLength - 1;
+	  var eMax = (1 << exponentLength) - 1;
+	  var eBias = eMax >> 1;
+	  var nBits = exponentLength - 7;
+	  var index = bytes - 1;
+	  var sign = buffer[index--];
+	  var exponent = sign & 127;
+	  var mantissa;
+	  sign >>= 7;
+	  for (; nBits > 0; exponent = exponent * 256 + buffer[index], index--, nBits -= 8);
+	  mantissa = exponent & (1 << -nBits) - 1;
+	  exponent >>= -nBits;
+	  nBits += mantissaLength;
+	  for (; nBits > 0; mantissa = mantissa * 256 + buffer[index], index--, nBits -= 8);
+	  if (exponent === 0) {
+	    exponent = 1 - eBias;
+	  } else if (exponent === eMax) {
+	    return mantissa ? NaN : sign ? -Infinity : Infinity;
+	  } else {
+	    mantissa = mantissa + pow$2(2, mantissaLength);
+	    exponent = exponent - eBias;
+	  } return (sign ? -1 : 1) * mantissa * pow$2(2, exponent - mantissaLength);
 	};
 
+	var ieee754$2 = {
+	  pack: pack,
+	  unpack: unpack
+	};
 
+	var toObject$d = toObject$i;
+	var toAbsoluteIndex$6 = toAbsoluteIndex$8;
+	var toLength$m = toLength$q;
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-tonumber
-
-	var ToNumber$1 = function ToNumber(argument) {
-		var value = isPrimitive(argument) ? argument : ToPrimitive(argument, $Number$1);
-		if (typeof value === 'symbol') {
-			throw new $TypeError$2('Cannot convert a Symbol value to a number');
-		}
-		if (typeof value === 'string') {
-			if (isBinary(value)) {
-				return ToNumber($parseInteger($strSlice(value, 2), 2));
-			} else if (isOctal(value)) {
-				return ToNumber($parseInteger($strSlice(value, 2), 8));
-			} else if (hasNonWS(value) || isInvalidHexLiteral(value)) {
-				return NaN;
-			} else {
-				var trimmed = $trim(value);
-				if (trimmed !== value) {
-					return ToNumber(trimmed);
-				}
-			}
-		}
-		return $Number$1(value);
-	};
+	// `Array.prototype.fill` method implementation
+	// https://tc39.es/ecma262/#sec-array.prototype.fill
+	var arrayFill$1 = function fill(value /* , start = 0, end = @length */) {
+	  var O = toObject$d(this);
+	  var length = toLength$m(O.length);
+	  var argumentsLength = arguments.length;
+	  var index = toAbsoluteIndex$6(argumentsLength > 1 ? arguments[1] : undefined, length);
+	  var end = argumentsLength > 2 ? arguments[2] : undefined;
+	  var endPos = end === undefined ? length : toAbsoluteIndex$6(end, length);
+	  while (endPos > index) O[index++] = value;
+	  return O;
+	};
+
+	var global$q = global$F;
+	var DESCRIPTORS$f = descriptors;
+	var NATIVE_ARRAY_BUFFER$2 = arrayBufferNative;
+	var createNonEnumerableProperty$5 = createNonEnumerableProperty$e;
+	var redefineAll$3 = redefineAll$4;
+	var fails$E = fails$N;
+	var anInstance$6 = anInstance$7;
+	var toInteger$6 = toInteger$b;
+	var toLength$l = toLength$q;
+	var toIndex$1 = toIndex$2;
+	var IEEE754 = ieee754$2;
+	var getPrototypeOf$2 = objectGetPrototypeOf;
+	var setPrototypeOf$5 = objectSetPrototypeOf;
+	var getOwnPropertyNames$4 = objectGetOwnPropertyNames.f;
+	var defineProperty$7 = objectDefineProperty.f;
+	var arrayFill = arrayFill$1;
+	var setToStringTag$6 = setToStringTag$a;
+	var InternalStateModule$5 = internalState;
+
+	var getInternalState$3 = InternalStateModule$5.get;
+	var setInternalState$5 = InternalStateModule$5.set;
+	var ARRAY_BUFFER$1 = 'ArrayBuffer';
+	var DATA_VIEW = 'DataView';
+	var PROTOTYPE = 'prototype';
+	var WRONG_LENGTH$1 = 'Wrong length';
+	var WRONG_INDEX = 'Wrong index';
+	var NativeArrayBuffer$1 = global$q[ARRAY_BUFFER$1];
+	var $ArrayBuffer = NativeArrayBuffer$1;
+	var $DataView = global$q[DATA_VIEW];
+	var $DataViewPrototype = $DataView && $DataView[PROTOTYPE];
+	var ObjectPrototype$1 = Object.prototype;
+	var RangeError$2 = global$q.RangeError;
+
+	var packIEEE754 = IEEE754.pack;
+	var unpackIEEE754 = IEEE754.unpack;
+
+	var packInt8 = function (number) {
+	  return [number & 0xFF];
+	};
+
+	var packInt16 = function (number) {
+	  return [number & 0xFF, number >> 8 & 0xFF];
+	};
+
+	var packInt32 = function (number) {
+	  return [number & 0xFF, number >> 8 & 0xFF, number >> 16 & 0xFF, number >> 24 & 0xFF];
+	};
+
+	var unpackInt32 = function (buffer) {
+	  return buffer[3] << 24 | buffer[2] << 16 | buffer[1] << 8 | buffer[0];
+	};
+
+	var packFloat32 = function (number) {
+	  return packIEEE754(number, 23, 4);
+	};
+
+	var packFloat64 = function (number) {
+	  return packIEEE754(number, 52, 8);
+	};
+
+	var addGetter$1 = function (Constructor, key) {
+	  defineProperty$7(Constructor[PROTOTYPE], key, { get: function () { return getInternalState$3(this)[key]; } });
+	};
+
+	var get$4 = function (view, count, index, isLittleEndian) {
+	  var intIndex = toIndex$1(index);
+	  var store = getInternalState$3(view);
+	  if (intIndex + count > store.byteLength) throw RangeError$2(WRONG_INDEX);
+	  var bytes = getInternalState$3(store.buffer).bytes;
+	  var start = intIndex + store.byteOffset;
+	  var pack = bytes.slice(start, start + count);
+	  return isLittleEndian ? pack : pack.reverse();
+	};
+
+	var set$3 = function (view, count, index, conversion, value, isLittleEndian) {
+	  var intIndex = toIndex$1(index);
+	  var store = getInternalState$3(view);
+	  if (intIndex + count > store.byteLength) throw RangeError$2(WRONG_INDEX);
+	  var bytes = getInternalState$3(store.buffer).bytes;
+	  var start = intIndex + store.byteOffset;
+	  var pack = conversion(+value);
+	  for (var i = 0; i < count; i++) bytes[start + i] = pack[isLittleEndian ? i : count - i - 1];
+	};
+
+	if (!NATIVE_ARRAY_BUFFER$2) {
+	  $ArrayBuffer = function ArrayBuffer(length) {
+	    anInstance$6(this, $ArrayBuffer, ARRAY_BUFFER$1);
+	    var byteLength = toIndex$1(length);
+	    setInternalState$5(this, {
+	      bytes: arrayFill.call(new Array(byteLength), 0),
+	      byteLength: byteLength
+	    });
+	    if (!DESCRIPTORS$f) this.byteLength = byteLength;
+	  };
+
+	  $DataView = function DataView(buffer, byteOffset, byteLength) {
+	    anInstance$6(this, $DataView, DATA_VIEW);
+	    anInstance$6(buffer, $ArrayBuffer, DATA_VIEW);
+	    var bufferLength = getInternalState$3(buffer).byteLength;
+	    var offset = toInteger$6(byteOffset);
+	    if (offset < 0 || offset > bufferLength) throw RangeError$2('Wrong offset');
+	    byteLength = byteLength === undefined ? bufferLength - offset : toLength$l(byteLength);
+	    if (offset + byteLength > bufferLength) throw RangeError$2(WRONG_LENGTH$1);
+	    setInternalState$5(this, {
+	      buffer: buffer,
+	      byteLength: byteLength,
+	      byteOffset: offset
+	    });
+	    if (!DESCRIPTORS$f) {
+	      this.buffer = buffer;
+	      this.byteLength = byteLength;
+	      this.byteOffset = offset;
+	    }
+	  };
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-tointeger
+	  if (DESCRIPTORS$f) {
+	    addGetter$1($ArrayBuffer, 'byteLength');
+	    addGetter$1($DataView, 'buffer');
+	    addGetter$1($DataView, 'byteLength');
+	    addGetter$1($DataView, 'byteOffset');
+	  }
 
-	var ToInteger$1 = function ToInteger$1(value) {
-		var number = ToNumber$1(value);
-		return ToInteger(number);
-	};
+	  redefineAll$3($DataView[PROTOTYPE], {
+	    getInt8: function getInt8(byteOffset) {
+	      return get$4(this, 1, byteOffset)[0] << 24 >> 24;
+	    },
+	    getUint8: function getUint8(byteOffset) {
+	      return get$4(this, 1, byteOffset)[0];
+	    },
+	    getInt16: function getInt16(byteOffset /* , littleEndian */) {
+	      var bytes = get$4(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined);
+	      return (bytes[1] << 8 | bytes[0]) << 16 >> 16;
+	    },
+	    getUint16: function getUint16(byteOffset /* , littleEndian */) {
+	      var bytes = get$4(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined);
+	      return bytes[1] << 8 | bytes[0];
+	    },
+	    getInt32: function getInt32(byteOffset /* , littleEndian */) {
+	      return unpackInt32(get$4(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined));
+	    },
+	    getUint32: function getUint32(byteOffset /* , littleEndian */) {
+	      return unpackInt32(get$4(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined)) >>> 0;
+	    },
+	    getFloat32: function getFloat32(byteOffset /* , littleEndian */) {
+	      return unpackIEEE754(get$4(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 23);
+	    },
+	    getFloat64: function getFloat64(byteOffset /* , littleEndian */) {
+	      return unpackIEEE754(get$4(this, 8, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 52);
+	    },
+	    setInt8: function setInt8(byteOffset, value) {
+	      set$3(this, 1, byteOffset, packInt8, value);
+	    },
+	    setUint8: function setUint8(byteOffset, value) {
+	      set$3(this, 1, byteOffset, packInt8, value);
+	    },
+	    setInt16: function setInt16(byteOffset, value /* , littleEndian */) {
+	      set$3(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);
+	    },
+	    setUint16: function setUint16(byteOffset, value /* , littleEndian */) {
+	      set$3(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);
+	    },
+	    setInt32: function setInt32(byteOffset, value /* , littleEndian */) {
+	      set$3(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);
+	    },
+	    setUint32: function setUint32(byteOffset, value /* , littleEndian */) {
+	      set$3(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);
+	    },
+	    setFloat32: function setFloat32(byteOffset, value /* , littleEndian */) {
+	      set$3(this, 4, byteOffset, packFloat32, value, arguments.length > 2 ? arguments[2] : undefined);
+	    },
+	    setFloat64: function setFloat64(byteOffset, value /* , littleEndian */) {
+	      set$3(this, 8, byteOffset, packFloat64, value, arguments.length > 2 ? arguments[2] : undefined);
+	    }
+	  });
+	} else {
+	  /* eslint-disable no-new -- required for testing */
+	  if (!fails$E(function () {
+	    NativeArrayBuffer$1(1);
+	  }) || !fails$E(function () {
+	    new NativeArrayBuffer$1(-1);
+	  }) || fails$E(function () {
+	    new NativeArrayBuffer$1();
+	    new NativeArrayBuffer$1(1.5);
+	    new NativeArrayBuffer$1(NaN);
+	    return NativeArrayBuffer$1.name != ARRAY_BUFFER$1;
+	  })) {
+	  /* eslint-enable no-new -- required for testing */
+	    $ArrayBuffer = function ArrayBuffer(length) {
+	      anInstance$6(this, $ArrayBuffer);
+	      return new NativeArrayBuffer$1(toIndex$1(length));
+	    };
+	    var ArrayBufferPrototype = $ArrayBuffer[PROTOTYPE] = NativeArrayBuffer$1[PROTOTYPE];
+	    for (var keys$2 = getOwnPropertyNames$4(NativeArrayBuffer$1), j$2 = 0, key$1; keys$2.length > j$2;) {
+	      if (!((key$1 = keys$2[j$2++]) in $ArrayBuffer)) {
+	        createNonEnumerableProperty$5($ArrayBuffer, key$1, NativeArrayBuffer$1[key$1]);
+	      }
+	    }
+	    ArrayBufferPrototype.constructor = $ArrayBuffer;
+	  }
 
-	var ToLength = function ToLength(argument) {
-		var len = ToInteger$1(argument);
-		if (len <= 0) { return 0; } // includes converting -0 to +0
-		if (len > maxSafeInteger) { return maxSafeInteger; }
-		return len;
-	};
+	  // WebKit bug - the same parent prototype for typed arrays and data view
+	  if (setPrototypeOf$5 && getPrototypeOf$2($DataViewPrototype) !== ObjectPrototype$1) {
+	    setPrototypeOf$5($DataViewPrototype, ObjectPrototype$1);
+	  }
 
-	// http://www.ecma-international.org/ecma-262/5.1/#sec-9.11
-
-	var IsCallable = isCallable;
-
-	var implementation$3 = function find(predicate) {
-		var list = ToObject(this);
-		var length = ToLength(list.length);
-		if (!IsCallable(predicate)) {
-			throw new TypeError('Array#find: predicate must be a function');
-		}
-		if (length === 0) {
-			return void 0;
-		}
-		var thisArg;
-		if (arguments.length > 0) {
-			thisArg = arguments[1];
-		}
-
-		for (var i = 0, value; i < length; i++) {
-			value = list[i];
-			// inlined for performance: if (Call(predicate, thisArg, [value, i, list])) {
-			if (predicate.apply(thisArg, [value, i, list])) {
-				return value;
-			}
-		}
-		return void 0;
-	};
+	  // iOS Safari 7.x bug
+	  var testView = new $DataView(new $ArrayBuffer(2));
+	  var $setInt8 = $DataViewPrototype.setInt8;
+	  testView.setInt8(0, 2147483648);
+	  testView.setInt8(1, 2147483649);
+	  if (testView.getInt8(0) || !testView.getInt8(1)) redefineAll$3($DataViewPrototype, {
+	    setInt8: function setInt8(byteOffset, value) {
+	      $setInt8.call(this, byteOffset, value << 24 >> 24);
+	    },
+	    setUint8: function setUint8(byteOffset, value) {
+	      $setInt8.call(this, byteOffset, value << 24 >> 24);
+	    }
+	  }, { unsafe: true });
+	}
 
-	var polyfill$4 = function getPolyfill() {
-		// Detect if an implementation exists
-		// Detect early implementations which skipped holes in sparse arrays
-		// eslint-disable-next-line no-sparse-arrays
-		var implemented = Array.prototype.find && [, 1].find(function () {
-			return true;
-		}) !== 1;
+	setToStringTag$6($ArrayBuffer, ARRAY_BUFFER$1);
+	setToStringTag$6($DataView, DATA_VIEW);
 
-		// eslint-disable-next-line global-require
-		return implemented ? Array.prototype.find : implementation$3;
+	var arrayBuffer = {
+	  ArrayBuffer: $ArrayBuffer,
+	  DataView: $DataView
 	};
 
-	var shim$8 = function shimArrayPrototypeFind() {
-		var polyfill = polyfill$4();
+	var anObject$f = anObject$m;
+	var aFunction$7 = aFunction$9;
+	var wellKnownSymbol$h = wellKnownSymbol$s;
 
-		defineProperties_1(Array.prototype, { find: polyfill }, {
-			find: function () {
-				return Array.prototype.find !== polyfill;
-			}
-		});
+	var SPECIES$5 = wellKnownSymbol$h('species');
 
-		return polyfill;
+	// `SpeciesConstructor` abstract operation
+	// https://tc39.es/ecma262/#sec-speciesconstructor
+	var speciesConstructor$8 = function (O, defaultConstructor) {
+	  var C = anObject$f(O).constructor;
+	  var S;
+	  return C === undefined || (S = anObject$f(C)[SPECIES$5]) == undefined ? defaultConstructor : aFunction$7(S);
 	};
 
-	var slice$2 = Array.prototype.slice;
+	var $$12 = _export;
+	var fails$D = fails$N;
+	var ArrayBufferModule$2 = arrayBuffer;
+	var anObject$e = anObject$m;
+	var toAbsoluteIndex$5 = toAbsoluteIndex$8;
+	var toLength$k = toLength$q;
+	var speciesConstructor$7 = speciesConstructor$8;
 
-	var polyfill$5 = polyfill$4();
+	var ArrayBuffer$4 = ArrayBufferModule$2.ArrayBuffer;
+	var DataView$2 = ArrayBufferModule$2.DataView;
+	var nativeArrayBufferSlice = ArrayBuffer$4.prototype.slice;
 
-	var boundFindShim = function find(array, predicate) { // eslint-disable-line no-unused-vars
-		RequireObjectCoercible(array);
-		var args = slice$2.call(arguments, 1);
-		return polyfill$5.apply(array, args);
-	};
+	var INCORRECT_SLICE = fails$D(function () {
+	  return !new ArrayBuffer$4(2).slice(1, undefined).byteLength;
+	});
 
-	defineProperties_1(boundFindShim, {
-		getPolyfill: polyfill$4,
-		implementation: implementation$3,
-		shim: shim$8
+	// `ArrayBuffer.prototype.slice` method
+	// https://tc39.es/ecma262/#sec-arraybuffer.prototype.slice
+	$$12({ target: 'ArrayBuffer', proto: true, unsafe: true, forced: INCORRECT_SLICE }, {
+	  slice: function slice(start, end) {
+	    if (nativeArrayBufferSlice !== undefined && end === undefined) {
+	      return nativeArrayBufferSlice.call(anObject$e(this), start); // FF fix
+	    }
+	    var length = anObject$e(this).byteLength;
+	    var first = toAbsoluteIndex$5(start, length);
+	    var fin = toAbsoluteIndex$5(end === undefined ? length : end, length);
+	    var result = new (speciesConstructor$7(this, ArrayBuffer$4))(toLength$k(fin - first));
+	    var viewSource = new DataView$2(this);
+	    var viewTarget = new DataView$2(result);
+	    var index = 0;
+	    while (first < fin) {
+	      viewTarget.setUint8(index++, viewSource.getUint8(first++));
+	    } return result;
+	  }
 	});
 
-	var array_prototype_find = boundFindShim;
-
-	var implementation$4 = function findIndex(predicate) {
-		var list = ToObject(this);
-		var length = ToLength(list.length);
-		if (!IsCallable(predicate)) {
-			throw new TypeError('Array#findIndex: predicate must be a function');
-		}
-
-		if (length === 0) {
-			return -1;
-		}
-
-		var thisArg;
-		if (arguments.length > 0) {
-			thisArg = arguments[1];
-		}
-
-		for (var i = 0, value; i < length; i++) {
-			value = list[i];
-			// inlined for performance: if (Call(predicate, thisArg, [value, i, list])) return i;
-			if (predicate.apply(thisArg, [value, i, list])) {
-				return i;
-			}
-		}
-
-		return -1;
-	};
+	var $$11 = _export;
+	var ArrayBufferModule$1 = arrayBuffer;
+	var NATIVE_ARRAY_BUFFER$1 = arrayBufferNative;
 
-	var polyfill$6 = function getPolyfill() {
-		// Detect if an implementation exists
-		// Detect early implementations which skipped holes in sparse arrays
-		// eslint-disable-next-line no-sparse-arrays
-		var implemented = Array.prototype.findIndex && ([, 1].findIndex(function (item, idx) {
-			return idx === 0;
-		}) === 0);
+	// `DataView` constructor
+	// https://tc39.es/ecma262/#sec-dataview-constructor
+	$$11({ global: true, forced: !NATIVE_ARRAY_BUFFER$1 }, {
+	  DataView: ArrayBufferModule$1.DataView
+	});
 
-		return implemented ? Array.prototype.findIndex : implementation$4;
+	var NATIVE_ARRAY_BUFFER = arrayBufferNative;
+	var DESCRIPTORS$e = descriptors;
+	var global$p = global$F;
+	var isObject$i = isObject$r;
+	var has$6 = has$j;
+	var classof$8 = classof$b;
+	var createNonEnumerableProperty$4 = createNonEnumerableProperty$e;
+	var redefine$9 = redefine$g.exports;
+	var defineProperty$6 = objectDefineProperty.f;
+	var getPrototypeOf$1 = objectGetPrototypeOf;
+	var setPrototypeOf$4 = objectSetPrototypeOf;
+	var wellKnownSymbol$g = wellKnownSymbol$s;
+	var uid$1 = uid$5;
+
+	var Int8Array$3 = global$p.Int8Array;
+	var Int8ArrayPrototype = Int8Array$3 && Int8Array$3.prototype;
+	var Uint8ClampedArray = global$p.Uint8ClampedArray;
+	var Uint8ClampedArrayPrototype = Uint8ClampedArray && Uint8ClampedArray.prototype;
+	var TypedArray$1 = Int8Array$3 && getPrototypeOf$1(Int8Array$3);
+	var TypedArrayPrototype$1 = Int8ArrayPrototype && getPrototypeOf$1(Int8ArrayPrototype);
+	var ObjectPrototype = Object.prototype;
+	var isPrototypeOf = ObjectPrototype.isPrototypeOf;
+
+	var TO_STRING_TAG = wellKnownSymbol$g('toStringTag');
+	var TYPED_ARRAY_TAG$1 = uid$1('TYPED_ARRAY_TAG');
+	// Fixing native typed arrays in Opera Presto crashes the browser, see #595
+	var NATIVE_ARRAY_BUFFER_VIEWS$3 = NATIVE_ARRAY_BUFFER && !!setPrototypeOf$4 && classof$8(global$p.opera) !== 'Opera';
+	var TYPED_ARRAY_TAG_REQIRED = false;
+	var NAME$1;
+
+	var TypedArrayConstructorsList = {
+	  Int8Array: 1,
+	  Uint8Array: 1,
+	  Uint8ClampedArray: 1,
+	  Int16Array: 2,
+	  Uint16Array: 2,
+	  Int32Array: 4,
+	  Uint32Array: 4,
+	  Float32Array: 4,
+	  Float64Array: 8
+	};
+
+	var BigIntArrayConstructorsList = {
+	  BigInt64Array: 8,
+	  BigUint64Array: 8
+	};
+
+	var isView = function isView(it) {
+	  if (!isObject$i(it)) return false;
+	  var klass = classof$8(it);
+	  return klass === 'DataView'
+	    || has$6(TypedArrayConstructorsList, klass)
+	    || has$6(BigIntArrayConstructorsList, klass);
+	};
+
+	var isTypedArray$1 = function (it) {
+	  if (!isObject$i(it)) return false;
+	  var klass = classof$8(it);
+	  return has$6(TypedArrayConstructorsList, klass)
+	    || has$6(BigIntArrayConstructorsList, klass);
+	};
+
+	var aTypedArray$m = function (it) {
+	  if (isTypedArray$1(it)) return it;
+	  throw TypeError('Target is not a typed array');
+	};
+
+	var aTypedArrayConstructor$5 = function (C) {
+	  if (setPrototypeOf$4) {
+	    if (isPrototypeOf.call(TypedArray$1, C)) return C;
+	  } else for (var ARRAY in TypedArrayConstructorsList) if (has$6(TypedArrayConstructorsList, NAME$1)) {
+	    var TypedArrayConstructor = global$p[ARRAY];
+	    if (TypedArrayConstructor && (C === TypedArrayConstructor || isPrototypeOf.call(TypedArrayConstructor, C))) {
+	      return C;
+	    }
+	  } throw TypeError('Target is not a typed array constructor');
+	};
+
+	var exportTypedArrayMethod$n = function (KEY, property, forced) {
+	  if (!DESCRIPTORS$e) return;
+	  if (forced) for (var ARRAY in TypedArrayConstructorsList) {
+	    var TypedArrayConstructor = global$p[ARRAY];
+	    if (TypedArrayConstructor && has$6(TypedArrayConstructor.prototype, KEY)) try {
+	      delete TypedArrayConstructor.prototype[KEY];
+	    } catch (error) { /* empty */ }
+	  }
+	  if (!TypedArrayPrototype$1[KEY] || forced) {
+	    redefine$9(TypedArrayPrototype$1, KEY, forced ? property
+	      : NATIVE_ARRAY_BUFFER_VIEWS$3 && Int8ArrayPrototype[KEY] || property);
+	  }
+	};
+
+	var exportTypedArrayStaticMethod$1 = function (KEY, property, forced) {
+	  var ARRAY, TypedArrayConstructor;
+	  if (!DESCRIPTORS$e) return;
+	  if (setPrototypeOf$4) {
+	    if (forced) for (ARRAY in TypedArrayConstructorsList) {
+	      TypedArrayConstructor = global$p[ARRAY];
+	      if (TypedArrayConstructor && has$6(TypedArrayConstructor, KEY)) try {
+	        delete TypedArrayConstructor[KEY];
+	      } catch (error) { /* empty */ }
+	    }
+	    if (!TypedArray$1[KEY] || forced) {
+	      // V8 ~ Chrome 49-50 `%TypedArray%` methods are non-writable non-configurable
+	      try {
+	        return redefine$9(TypedArray$1, KEY, forced ? property : NATIVE_ARRAY_BUFFER_VIEWS$3 && TypedArray$1[KEY] || property);
+	      } catch (error) { /* empty */ }
+	    } else return;
+	  }
+	  for (ARRAY in TypedArrayConstructorsList) {
+	    TypedArrayConstructor = global$p[ARRAY];
+	    if (TypedArrayConstructor && (!TypedArrayConstructor[KEY] || forced)) {
+	      redefine$9(TypedArrayConstructor, KEY, property);
+	    }
+	  }
 	};
 
-	var shim$9 = function shimFindIndex() {
-		var polyfill = polyfill$6();
+	for (NAME$1 in TypedArrayConstructorsList) {
+	  if (!global$p[NAME$1]) NATIVE_ARRAY_BUFFER_VIEWS$3 = false;
+	}
 
-		defineProperties_1(Array.prototype, { findIndex: polyfill }, {
-			findIndex: function () {
-				return Array.prototype.findIndex !== polyfill;
-			}
-		});
+	// WebKit bug - typed arrays constructors prototype is Object.prototype
+	if (!NATIVE_ARRAY_BUFFER_VIEWS$3 || typeof TypedArray$1 != 'function' || TypedArray$1 === Function.prototype) {
+	  // eslint-disable-next-line no-shadow -- safe
+	  TypedArray$1 = function TypedArray() {
+	    throw TypeError('Incorrect invocation');
+	  };
+	  if (NATIVE_ARRAY_BUFFER_VIEWS$3) for (NAME$1 in TypedArrayConstructorsList) {
+	    if (global$p[NAME$1]) setPrototypeOf$4(global$p[NAME$1], TypedArray$1);
+	  }
+	}
 
-		return polyfill;
-	};
+	if (!NATIVE_ARRAY_BUFFER_VIEWS$3 || !TypedArrayPrototype$1 || TypedArrayPrototype$1 === ObjectPrototype) {
+	  TypedArrayPrototype$1 = TypedArray$1.prototype;
+	  if (NATIVE_ARRAY_BUFFER_VIEWS$3) for (NAME$1 in TypedArrayConstructorsList) {
+	    if (global$p[NAME$1]) setPrototypeOf$4(global$p[NAME$1].prototype, TypedArrayPrototype$1);
+	  }
+	}
 
-	var slice$3 = Array.prototype.slice;
+	// WebKit bug - one more object in Uint8ClampedArray prototype chain
+	if (NATIVE_ARRAY_BUFFER_VIEWS$3 && getPrototypeOf$1(Uint8ClampedArrayPrototype) !== TypedArrayPrototype$1) {
+	  setPrototypeOf$4(Uint8ClampedArrayPrototype, TypedArrayPrototype$1);
+	}
 
-	var polyfill$7 = polyfill$6();
+	if (DESCRIPTORS$e && !has$6(TypedArrayPrototype$1, TO_STRING_TAG)) {
+	  TYPED_ARRAY_TAG_REQIRED = true;
+	  defineProperty$6(TypedArrayPrototype$1, TO_STRING_TAG, { get: function () {
+	    return isObject$i(this) ? this[TYPED_ARRAY_TAG$1] : undefined;
+	  } });
+	  for (NAME$1 in TypedArrayConstructorsList) if (global$p[NAME$1]) {
+	    createNonEnumerableProperty$4(global$p[NAME$1], TYPED_ARRAY_TAG$1, NAME$1);
+	  }
+	}
 
-	var boundShim = function findIndex(array, predicate) { // eslint-disable-line no-unused-vars
-		RequireObjectCoercible(array);
-		var args = slice$3.call(arguments, 1);
-		return polyfill$7.apply(array, args);
+	var arrayBufferViewCore = {
+	  NATIVE_ARRAY_BUFFER_VIEWS: NATIVE_ARRAY_BUFFER_VIEWS$3,
+	  TYPED_ARRAY_TAG: TYPED_ARRAY_TAG_REQIRED && TYPED_ARRAY_TAG$1,
+	  aTypedArray: aTypedArray$m,
+	  aTypedArrayConstructor: aTypedArrayConstructor$5,
+	  exportTypedArrayMethod: exportTypedArrayMethod$n,
+	  exportTypedArrayStaticMethod: exportTypedArrayStaticMethod$1,
+	  isView: isView,
+	  isTypedArray: isTypedArray$1,
+	  TypedArray: TypedArray$1,
+	  TypedArrayPrototype: TypedArrayPrototype$1
 	};
 
-	defineProperties_1(boundShim, {
-		getPolyfill: polyfill$6,
-		implementation: implementation$4,
-		shim: shim$9
+	var $$10 = _export;
+	var ArrayBufferViewCore$n = arrayBufferViewCore;
+
+	var NATIVE_ARRAY_BUFFER_VIEWS$2 = ArrayBufferViewCore$n.NATIVE_ARRAY_BUFFER_VIEWS;
+
+	// `ArrayBuffer.isView` method
+	// https://tc39.es/ecma262/#sec-arraybuffer.isview
+	$$10({ target: 'ArrayBuffer', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS$2 }, {
+	  isView: ArrayBufferViewCore$n.isView
 	});
 
-	var array_prototype_findindex = boundShim;
+	var getBuiltIn$4 = getBuiltIn$9;
+	var definePropertyModule$2 = objectDefineProperty;
+	var wellKnownSymbol$f = wellKnownSymbol$s;
+	var DESCRIPTORS$d = descriptors;
 
-	var $apply$1 = GetIntrinsic('%Reflect.apply%', true) || callBound('%Function.prototype.apply%');
+	var SPECIES$4 = wellKnownSymbol$f('species');
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-call
+	var setSpecies$5 = function (CONSTRUCTOR_NAME) {
+	  var Constructor = getBuiltIn$4(CONSTRUCTOR_NAME);
+	  var defineProperty = definePropertyModule$2.f;
 
-	var Call = function Call(F, V) {
-		var args = arguments.length > 2 ? arguments[2] : [];
-		return $apply$1(F, V, args);
+	  if (DESCRIPTORS$d && Constructor && !Constructor[SPECIES$4]) {
+	    defineProperty(Constructor, SPECIES$4, {
+	      configurable: true,
+	      get: function () { return this; }
+	    });
+	  }
 	};
 
-	var $defineProperty = GetIntrinsic('%Object.defineProperty%', true);
-
-	if ($defineProperty) {
-		try {
-			$defineProperty({}, 'a', { value: 1 });
-		} catch (e) {
-			// IE 8 has a broken defineProperty
-			$defineProperty = null;
-		}
-	}
-
-
-
-	var $isEnumerable = callBound('Object.prototype.propertyIsEnumerable');
-
-	// eslint-disable-next-line max-params
-	var DefineOwnProperty = function DefineOwnProperty(IsDataDescriptor, SameValue, FromPropertyDescriptor, O, P, desc) {
-		if (!$defineProperty) {
-			if (!IsDataDescriptor(desc)) {
-				// ES3 does not support getters/setters
-				return false;
-			}
-			if (!desc['[[Configurable]]'] || !desc['[[Writable]]']) {
-				return false;
-			}
-
-			// fallback for ES3
-			if (P in O && $isEnumerable(O, P) !== !!desc['[[Enumerable]]']) {
-				// a non-enumerable existing property
-				return false;
-			}
-
-			// property does not exist at all, or exists but is enumerable
-			var V = desc['[[Value]]'];
-			// eslint-disable-next-line no-param-reassign
-			O[P] = V; // will use [[Define]]
-			return SameValue(O[P], V);
-		}
-		$defineProperty(O, P, FromPropertyDescriptor(desc));
-		return true;
-	};
+	var $$$ = _export;
+	var global$o = global$F;
+	var arrayBufferModule = arrayBuffer;
+	var setSpecies$4 = setSpecies$5;
 
-	var src = functionBind.call(Function.call, Object.prototype.hasOwnProperty);
-
-	var $TypeError$3 = GetIntrinsic('%TypeError%');
-	var $SyntaxError = GetIntrinsic('%SyntaxError%');
-
-
-
-	var predicates = {
-		// https://ecma-international.org/ecma-262/6.0/#sec-property-descriptor-specification-type
-		'Property Descriptor': function isPropertyDescriptor(Type, Desc) {
-			if (Type(Desc) !== 'Object') {
-				return false;
-			}
-			var allowed = {
-				'[[Configurable]]': true,
-				'[[Enumerable]]': true,
-				'[[Get]]': true,
-				'[[Set]]': true,
-				'[[Value]]': true,
-				'[[Writable]]': true
-			};
-
-			for (var key in Desc) { // eslint-disable-line
-				if (src(Desc, key) && !allowed[key]) {
-					return false;
-				}
-			}
-
-			var isData = src(Desc, '[[Value]]');
-			var IsAccessor = src(Desc, '[[Get]]') || src(Desc, '[[Set]]');
-			if (isData && IsAccessor) {
-				throw new $TypeError$3('Property Descriptors may not be both accessor and data descriptors');
-			}
-			return true;
-		}
-	};
+	var ARRAY_BUFFER = 'ArrayBuffer';
+	var ArrayBuffer$3 = arrayBufferModule[ARRAY_BUFFER];
+	var NativeArrayBuffer = global$o[ARRAY_BUFFER];
 
-	var assertRecord = function assertRecord(Type, recordType, argumentName, value) {
-		var predicate = predicates[recordType];
-		if (typeof predicate !== 'function') {
-			throw new $SyntaxError('unknown record type: ' + recordType);
-		}
-		if (!predicate(Type, value)) {
-			throw new $TypeError$3(argumentName + ' must be a ' + recordType);
-		}
-	};
+	// `ArrayBuffer` constructor
+	// https://tc39.es/ecma262/#sec-arraybuffer-constructor
+	$$$({ global: true, forced: NativeArrayBuffer !== ArrayBuffer$3 }, {
+	  ArrayBuffer: ArrayBuffer$3
+	});
 
-	// https://www.ecma-international.org/ecma-262/5.1/#sec-8
-
-	var Type = function Type(x) {
-		if (x === null) {
-			return 'Null';
-		}
-		if (typeof x === 'undefined') {
-			return 'Undefined';
-		}
-		if (typeof x === 'function' || typeof x === 'object') {
-			return 'Object';
-		}
-		if (typeof x === 'number') {
-			return 'Number';
-		}
-		if (typeof x === 'boolean') {
-			return 'Boolean';
-		}
-		if (typeof x === 'string') {
-			return 'String';
-		}
-	};
+	setSpecies$4(ARRAY_BUFFER);
 
-	// https://ecma-international.org/ecma-262/6.0/#sec-ecmascript-data-types-and-values
+	var fails$C = fails$N;
 
-	var Type$1 = function Type$1(x) {
-		if (typeof x === 'symbol') {
-			return 'Symbol';
-		}
-		return Type(x);
+	var arrayMethodIsStrict$8 = function (METHOD_NAME, argument) {
+	  var method = [][METHOD_NAME];
+	  return !!method && fails$C(function () {
+	    // eslint-disable-next-line no-useless-call,no-throw-literal -- required for testing
+	    method.call(null, argument || function () { throw 1; }, 1);
+	  });
 	};
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-frompropertydescriptor
-
-	var FromPropertyDescriptor = function FromPropertyDescriptor(Desc) {
-		if (typeof Desc === 'undefined') {
-			return Desc;
-		}
-
-		assertRecord(Type$1, 'Property Descriptor', 'Desc', Desc);
-
-		var obj = {};
-		if ('[[Value]]' in Desc) {
-			obj.value = Desc['[[Value]]'];
-		}
-		if ('[[Writable]]' in Desc) {
-			obj.writable = Desc['[[Writable]]'];
-		}
-		if ('[[Get]]' in Desc) {
-			obj.get = Desc['[[Get]]'];
-		}
-		if ('[[Set]]' in Desc) {
-			obj.set = Desc['[[Set]]'];
-		}
-		if ('[[Enumerable]]' in Desc) {
-			obj.enumerable = Desc['[[Enumerable]]'];
-		}
-		if ('[[Configurable]]' in Desc) {
-			obj.configurable = Desc['[[Configurable]]'];
-		}
-		return obj;
-	};
+	/* eslint-disable es/no-array-prototype-indexof -- required for testing */
+	var $$_ = _export;
+	var $indexOf$1 = arrayIncludes.indexOf;
+	var arrayMethodIsStrict$7 = arrayMethodIsStrict$8;
 
-	var $gOPD$1 = GetIntrinsic('%Object.getOwnPropertyDescriptor%');
-	if ($gOPD$1) {
-		try {
-			$gOPD$1([], 'length');
-		} catch (e) {
-			// IE 8 has a broken gOPD
-			$gOPD$1 = null;
-		}
-	}
+	var nativeIndexOf = [].indexOf;
 
-	var getOwnPropertyDescriptor = $gOPD$1;
+	var NEGATIVE_ZERO$1 = !!nativeIndexOf && 1 / [1].indexOf(1, -0) < 0;
+	var STRICT_METHOD$7 = arrayMethodIsStrict$7('indexOf');
 
-	var $Array = GetIntrinsic('%Array%');
+	// `Array.prototype.indexOf` method
+	// https://tc39.es/ecma262/#sec-array.prototype.indexof
+	$$_({ target: 'Array', proto: true, forced: NEGATIVE_ZERO$1 || !STRICT_METHOD$7 }, {
+	  indexOf: function indexOf(searchElement /* , fromIndex = 0 */) {
+	    return NEGATIVE_ZERO$1
+	      // convert -0 to +0
+	      ? nativeIndexOf.apply(this, arguments) || 0
+	      : $indexOf$1(this, searchElement, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
 
-	// eslint-disable-next-line global-require
-	var toStr$6 = !$Array.isArray && callBound('Object.prototype.toString');
+	var fails$B = fails$N;
+	var wellKnownSymbol$e = wellKnownSymbol$s;
+	var V8_VERSION$2 = engineV8Version;
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-isarray
+	var SPECIES$3 = wellKnownSymbol$e('species');
 
-	var IsArray = $Array.isArray || function IsArray(argument) {
-		return toStr$6(argument) === '[object Array]';
+	var arrayMethodHasSpeciesSupport$5 = function (METHOD_NAME) {
+	  // We can't use this feature detection in V8 since it causes
+	  // deoptimization and serious performance degradation
+	  // https://github.com/zloirock/core-js/issues/677
+	  return V8_VERSION$2 >= 51 || !fails$B(function () {
+	    var array = [];
+	    var constructor = array.constructor = {};
+	    constructor[SPECIES$3] = function () {
+	      return { foo: 1 };
+	    };
+	    return array[METHOD_NAME](Boolean).foo !== 1;
+	  });
 	};
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-ispropertykey
+	var $$Z = _export;
+	var $map$1 = arrayIteration.map;
+	var arrayMethodHasSpeciesSupport$4 = arrayMethodHasSpeciesSupport$5;
 
-	var IsPropertyKey = function IsPropertyKey(argument) {
-		return typeof argument === 'string' || typeof argument === 'symbol';
-	};
+	var HAS_SPECIES_SUPPORT$3 = arrayMethodHasSpeciesSupport$4('map');
 
-	var hasSymbols$4 = hasSymbols$1();
-	var hasToStringTag$2 = hasSymbols$4 && typeof Symbol.toStringTag === 'symbol';
-	var regexExec;
-	var isRegexMarker;
-	var badStringifier;
+	// `Array.prototype.map` method
+	// https://tc39.es/ecma262/#sec-array.prototype.map
+	// with adding support of @@species
+	$$Z({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$3 }, {
+	  map: function map(callbackfn /* , thisArg */) {
+	    return $map$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
 
-	if (hasToStringTag$2) {
-		regexExec = Function.call.bind(RegExp.prototype.exec);
-		isRegexMarker = {};
+	var $forEach$1 = arrayIteration.forEach;
+	var arrayMethodIsStrict$6 = arrayMethodIsStrict$8;
 
-		var throwRegexMarker = function () {
-			throw isRegexMarker;
-		};
-		badStringifier = {
-			toString: throwRegexMarker,
-			valueOf: throwRegexMarker
-		};
+	var STRICT_METHOD$6 = arrayMethodIsStrict$6('forEach');
 
-		if (typeof Symbol.toPrimitive === 'symbol') {
-			badStringifier[Symbol.toPrimitive] = throwRegexMarker;
-		}
-	}
+	// `Array.prototype.forEach` method implementation
+	// https://tc39.es/ecma262/#sec-array.prototype.foreach
+	var arrayForEach = !STRICT_METHOD$6 ? function forEach(callbackfn /* , thisArg */) {
+	  return $forEach$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	// eslint-disable-next-line es/no-array-prototype-foreach -- safe
+	} : [].forEach;
 
-	var toStr$7 = Object.prototype.toString;
-	var regexClass = '[object RegExp]';
+	var $$Y = _export;
+	var forEach$3 = arrayForEach;
 
-	var isRegex = hasToStringTag$2
-		// eslint-disable-next-line consistent-return
-		? function isRegex(value) {
-			if (!value || typeof value !== 'object') {
-				return false;
-			}
+	// `Array.prototype.forEach` method
+	// https://tc39.es/ecma262/#sec-array.prototype.foreach
+	// eslint-disable-next-line es/no-array-prototype-foreach -- safe
+	$$Y({ target: 'Array', proto: true, forced: [].forEach != forEach$3 }, {
+	  forEach: forEach$3
+	});
 
-			try {
-				regexExec(value, badStringifier);
-			} catch (e) {
-				return e === isRegexMarker;
-			}
-		}
-		: function isRegex(value) {
-			// In older browsers, typeof regex incorrectly returns 'function'
-			if (!value || (typeof value !== 'object' && typeof value !== 'function')) {
-				return false;
-			}
+	var global$n = global$F;
+	var DOMIterables = domIterables;
+	var forEach$2 = arrayForEach;
+	var createNonEnumerableProperty$3 = createNonEnumerableProperty$e;
 
-			return toStr$7.call(value) === regexClass;
-		};
+	for (var COLLECTION_NAME in DOMIterables) {
+	  var Collection = global$n[COLLECTION_NAME];
+	  var CollectionPrototype = Collection && Collection.prototype;
+	  // some Chrome versions have non-configurable methods on DOMTokenList
+	  if (CollectionPrototype && CollectionPrototype.forEach !== forEach$2) try {
+	    createNonEnumerableProperty$3(CollectionPrototype, 'forEach', forEach$2);
+	  } catch (error) {
+	    CollectionPrototype.forEach = forEach$2;
+	  }
+	}
 
-	// http://www.ecma-international.org/ecma-262/5.1/#sec-9.2
+	var $$X = _export;
+	var isArray$3 = isArray$6;
 
-	var ToBoolean = function ToBoolean(value) { return !!value; };
+	// `Array.isArray` method
+	// https://tc39.es/ecma262/#sec-array.isarray
+	$$X({ target: 'Array', stat: true }, {
+	  isArray: isArray$3
+	});
 
-	var $match = GetIntrinsic('%Symbol.match%', true);
+	var $$W = _export;
+	var fails$A = fails$N;
+	var getOwnPropertyNames$3 = objectGetOwnPropertyNamesExternal.f;
 
+	// eslint-disable-next-line es/no-object-getownpropertynames -- required for testing
+	var FAILS_ON_PRIMITIVES$4 = fails$A(function () { return !Object.getOwnPropertyNames(1); });
 
+	// `Object.getOwnPropertyNames` method
+	// https://tc39.es/ecma262/#sec-object.getownpropertynames
+	$$W({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$4 }, {
+	  getOwnPropertyNames: getOwnPropertyNames$3
+	});
 
+	var global$m = global$F;
 
+	var nativePromiseConstructor = global$m.Promise;
 
-	// https://ecma-international.org/ecma-262/6.0/#sec-isregexp
+	var wellKnownSymbol$d = wellKnownSymbol$s;
+	var Iterators$1 = iterators;
 
-	var IsRegExp = function IsRegExp(argument) {
-		if (!argument || typeof argument !== 'object') {
-			return false;
-		}
-		if ($match) {
-			var isRegExp = argument[$match];
-			if (typeof isRegExp !== 'undefined') {
-				return ToBoolean(isRegExp);
-			}
-		}
-		return isRegex(argument);
-	};
+	var ITERATOR$5 = wellKnownSymbol$d('iterator');
+	var ArrayPrototype = Array.prototype;
 
-	var $TypeError$4 = GetIntrinsic('%TypeError%');
-
-
-
-
-
-	// https://ecma-international.org/ecma-262/5.1/#sec-8.10.5
-
-	var ToPropertyDescriptor = function ToPropertyDescriptor(Obj) {
-		if (Type$1(Obj) !== 'Object') {
-			throw new $TypeError$4('ToPropertyDescriptor requires an object');
-		}
-
-		var desc = {};
-		if (src(Obj, 'enumerable')) {
-			desc['[[Enumerable]]'] = ToBoolean(Obj.enumerable);
-		}
-		if (src(Obj, 'configurable')) {
-			desc['[[Configurable]]'] = ToBoolean(Obj.configurable);
-		}
-		if (src(Obj, 'value')) {
-			desc['[[Value]]'] = Obj.value;
-		}
-		if (src(Obj, 'writable')) {
-			desc['[[Writable]]'] = ToBoolean(Obj.writable);
-		}
-		if (src(Obj, 'get')) {
-			var getter = Obj.get;
-			if (typeof getter !== 'undefined' && !IsCallable(getter)) {
-				throw new TypeError('getter must be a function');
-			}
-			desc['[[Get]]'] = getter;
-		}
-		if (src(Obj, 'set')) {
-			var setter = Obj.set;
-			if (typeof setter !== 'undefined' && !IsCallable(setter)) {
-				throw new $TypeError$4('setter must be a function');
-			}
-			desc['[[Set]]'] = setter;
-		}
-
-		if ((src(desc, '[[Get]]') || src(desc, '[[Set]]')) && (src(desc, '[[Value]]') || src(desc, '[[Writable]]'))) {
-			throw new $TypeError$4('Invalid property descriptor. Cannot both specify accessors and a value or writable attribute');
-		}
-		return desc;
+	// check on default Array iterator
+	var isArrayIteratorMethod$3 = function (it) {
+	  return it !== undefined && (Iterators$1.Array === it || ArrayPrototype[ITERATOR$5] === it);
 	};
 
-	var $TypeError$5 = GetIntrinsic('%TypeError%');
-
+	var classof$7 = classof$b;
+	var Iterators = iterators;
+	var wellKnownSymbol$c = wellKnownSymbol$s;
 
+	var ITERATOR$4 = wellKnownSymbol$c('iterator');
 
-	var $isEnumerable$1 = callBound('Object.prototype.propertyIsEnumerable');
-
+	var getIteratorMethod$5 = function (it) {
+	  if (it != undefined) return it[ITERATOR$4]
+	    || it['@@iterator']
+	    || Iterators[classof$7(it)];
+	};
 
+	var anObject$d = anObject$m;
 
+	var iteratorClose$2 = function (iterator) {
+	  var returnMethod = iterator['return'];
+	  if (returnMethod !== undefined) {
+	    return anObject$d(returnMethod.call(iterator)).value;
+	  }
+	};
 
+	var anObject$c = anObject$m;
+	var isArrayIteratorMethod$2 = isArrayIteratorMethod$3;
+	var toLength$j = toLength$q;
+	var bind$a = functionBindContext;
+	var getIteratorMethod$4 = getIteratorMethod$5;
+	var iteratorClose$1 = iteratorClose$2;
 
+	var Result = function (stopped, result) {
+	  this.stopped = stopped;
+	  this.result = result;
+	};
 
+	var iterate$3 = function (iterable, unboundFunction, options) {
+	  var that = options && options.that;
+	  var AS_ENTRIES = !!(options && options.AS_ENTRIES);
+	  var IS_ITERATOR = !!(options && options.IS_ITERATOR);
+	  var INTERRUPTED = !!(options && options.INTERRUPTED);
+	  var fn = bind$a(unboundFunction, that, 1 + AS_ENTRIES + INTERRUPTED);
+	  var iterator, iterFn, index, length, result, next, step;
 
+	  var stop = function (condition) {
+	    if (iterator) iteratorClose$1(iterator);
+	    return new Result(true, condition);
+	  };
 
+	  var callFn = function (value) {
+	    if (AS_ENTRIES) {
+	      anObject$c(value);
+	      return INTERRUPTED ? fn(value[0], value[1], stop) : fn(value[0], value[1]);
+	    } return INTERRUPTED ? fn(value, stop) : fn(value);
+	  };
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-ordinarygetownproperty
+	  if (IS_ITERATOR) {
+	    iterator = iterable;
+	  } else {
+	    iterFn = getIteratorMethod$4(iterable);
+	    if (typeof iterFn != 'function') throw TypeError('Target is not iterable');
+	    // optimisation for array iterators
+	    if (isArrayIteratorMethod$2(iterFn)) {
+	      for (index = 0, length = toLength$j(iterable.length); length > index; index++) {
+	        result = callFn(iterable[index]);
+	        if (result && result instanceof Result) return result;
+	      } return new Result(false);
+	    }
+	    iterator = iterFn.call(iterable);
+	  }
 
-	var OrdinaryGetOwnProperty = function OrdinaryGetOwnProperty(O, P) {
-		if (Type$1(O) !== 'Object') {
-			throw new $TypeError$5('Assertion failed: O must be an Object');
-		}
-		if (!IsPropertyKey(P)) {
-			throw new $TypeError$5('Assertion failed: P must be a Property Key');
-		}
-		if (!src(O, P)) {
-			return void 0;
-		}
-		if (!getOwnPropertyDescriptor) {
-			// ES3 / IE 8 fallback
-			var arrayLength = IsArray(O) && P === 'length';
-			var regexLastIndex = IsRegExp(O) && P === 'lastIndex';
-			return {
-				'[[Configurable]]': !(arrayLength || regexLastIndex),
-				'[[Enumerable]]': $isEnumerable$1(O, P),
-				'[[Value]]': O[P],
-				'[[Writable]]': true
-			};
-		}
-		return ToPropertyDescriptor(getOwnPropertyDescriptor(O, P));
+	  next = iterator.next;
+	  while (!(step = next.call(iterator)).done) {
+	    try {
+	      result = callFn(step.value);
+	    } catch (error) {
+	      iteratorClose$1(iterator);
+	      throw error;
+	    }
+	    if (typeof result == 'object' && result && result instanceof Result) return result;
+	  } return new Result(false);
 	};
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-isdatadescriptor
+	var wellKnownSymbol$b = wellKnownSymbol$s;
 
-	var IsDataDescriptor = function IsDataDescriptor(Desc) {
-		if (typeof Desc === 'undefined') {
-			return false;
-		}
+	var ITERATOR$3 = wellKnownSymbol$b('iterator');
+	var SAFE_CLOSING = false;
 
-		assertRecord(Type$1, 'Property Descriptor', 'Desc', Desc);
+	try {
+	  var called = 0;
+	  var iteratorWithReturn = {
+	    next: function () {
+	      return { done: !!called++ };
+	    },
+	    'return': function () {
+	      SAFE_CLOSING = true;
+	    }
+	  };
+	  iteratorWithReturn[ITERATOR$3] = function () {
+	    return this;
+	  };
+	  // eslint-disable-next-line es/no-array-from, no-throw-literal -- required for testing
+	  Array.from(iteratorWithReturn, function () { throw 2; });
+	} catch (error) { /* empty */ }
 
-		if (!src(Desc, '[[Value]]') && !src(Desc, '[[Writable]]')) {
-			return false;
-		}
+	var checkCorrectnessOfIteration$4 = function (exec, SKIP_CLOSING) {
+	  if (!SKIP_CLOSING && !SAFE_CLOSING) return false;
+	  var ITERATION_SUPPORT = false;
+	  try {
+	    var object = {};
+	    object[ITERATOR$3] = function () {
+	      return {
+	        next: function () {
+	          return { done: ITERATION_SUPPORT = true };
+	        }
+	      };
+	    };
+	    exec(object);
+	  } catch (error) { /* empty */ }
+	  return ITERATION_SUPPORT;
+	};
+
+	var userAgent$4 = engineUserAgent;
+
+	var engineIsIos = /(?:iphone|ipod|ipad).*applewebkit/i.test(userAgent$4);
+
+	var classof$6 = classofRaw$1;
+	var global$l = global$F;
+
+	var engineIsNode = classof$6(global$l.process) == 'process';
+
+	var global$k = global$F;
+	var fails$z = fails$N;
+	var bind$9 = functionBindContext;
+	var html = html$2;
+	var createElement = documentCreateElement$1;
+	var IS_IOS$1 = engineIsIos;
+	var IS_NODE$3 = engineIsNode;
+
+	var location$1 = global$k.location;
+	var set$2 = global$k.setImmediate;
+	var clear = global$k.clearImmediate;
+	var process$3 = global$k.process;
+	var MessageChannel = global$k.MessageChannel;
+	var Dispatch$1 = global$k.Dispatch;
+	var counter = 0;
+	var queue = {};
+	var ONREADYSTATECHANGE = 'onreadystatechange';
+	var defer, channel, port;
+
+	var run = function (id) {
+	  // eslint-disable-next-line no-prototype-builtins -- safe
+	  if (queue.hasOwnProperty(id)) {
+	    var fn = queue[id];
+	    delete queue[id];
+	    fn();
+	  }
+	};
+
+	var runner = function (id) {
+	  return function () {
+	    run(id);
+	  };
+	};
+
+	var listener = function (event) {
+	  run(event.data);
+	};
+
+	var post = function (id) {
+	  // old engines have not location.origin
+	  global$k.postMessage(id + '', location$1.protocol + '//' + location$1.host);
+	};
+
+	// Node.js 0.9+ & IE10+ has setImmediate, otherwise:
+	if (!set$2 || !clear) {
+	  set$2 = function setImmediate(fn) {
+	    var args = [];
+	    var i = 1;
+	    while (arguments.length > i) args.push(arguments[i++]);
+	    queue[++counter] = function () {
+	      // eslint-disable-next-line no-new-func -- spec requirement
+	      (typeof fn == 'function' ? fn : Function(fn)).apply(undefined, args);
+	    };
+	    defer(counter);
+	    return counter;
+	  };
+	  clear = function clearImmediate(id) {
+	    delete queue[id];
+	  };
+	  // Node.js 0.8-
+	  if (IS_NODE$3) {
+	    defer = function (id) {
+	      process$3.nextTick(runner(id));
+	    };
+	  // Sphere (JS game engine) Dispatch API
+	  } else if (Dispatch$1 && Dispatch$1.now) {
+	    defer = function (id) {
+	      Dispatch$1.now(runner(id));
+	    };
+	  // Browsers with MessageChannel, includes WebWorkers
+	  // except iOS - https://github.com/zloirock/core-js/issues/624
+	  } else if (MessageChannel && !IS_IOS$1) {
+	    channel = new MessageChannel();
+	    port = channel.port2;
+	    channel.port1.onmessage = listener;
+	    defer = bind$9(port.postMessage, port, 1);
+	  // Browsers with postMessage, skip WebWorkers
+	  // IE8 has postMessage, but it's sync & typeof its postMessage is 'object'
+	  } else if (
+	    global$k.addEventListener &&
+	    typeof postMessage == 'function' &&
+	    !global$k.importScripts &&
+	    location$1 && location$1.protocol !== 'file:' &&
+	    !fails$z(post)
+	  ) {
+	    defer = post;
+	    global$k.addEventListener('message', listener, false);
+	  // IE8-
+	  } else if (ONREADYSTATECHANGE in createElement('script')) {
+	    defer = function (id) {
+	      html.appendChild(createElement('script'))[ONREADYSTATECHANGE] = function () {
+	        html.removeChild(this);
+	        run(id);
+	      };
+	    };
+	  // Rest old browsers
+	  } else {
+	    defer = function (id) {
+	      setTimeout(runner(id), 0);
+	    };
+	  }
+	}
 
-		return true;
+	var task$1 = {
+	  set: set$2,
+	  clear: clear
 	};
 
-	var $Object$1 = GetIntrinsic('%Object%');
-
+	var userAgent$3 = engineUserAgent;
 
+	var engineIsWebosWebkit = /web0s(?!.*chrome)/i.test(userAgent$3);
 
-	var $preventExtensions = $Object$1.preventExtensions;
-	var $isExtensible = $Object$1.isExtensible;
+	var global$j = global$F;
+	var getOwnPropertyDescriptor$3 = objectGetOwnPropertyDescriptor.f;
+	var macrotask = task$1.set;
+	var IS_IOS = engineIsIos;
+	var IS_WEBOS_WEBKIT = engineIsWebosWebkit;
+	var IS_NODE$2 = engineIsNode;
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-isextensible-o
+	var MutationObserver = global$j.MutationObserver || global$j.WebKitMutationObserver;
+	var document$2 = global$j.document;
+	var process$2 = global$j.process;
+	var Promise$1 = global$j.Promise;
+	// Node.js 11 shows ExperimentalWarning on getting `queueMicrotask`
+	var queueMicrotaskDescriptor = getOwnPropertyDescriptor$3(global$j, 'queueMicrotask');
+	var queueMicrotask = queueMicrotaskDescriptor && queueMicrotaskDescriptor.value;
 
-	var IsExtensible = $preventExtensions
-		? function IsExtensible(obj) {
-			return !isPrimitive(obj) && $isExtensible(obj);
-		}
-		: function IsExtensible(obj) {
-			return !isPrimitive(obj);
-		};
+	var flush, head, last, notify$1, toggle, node, promise, then;
 
-	// http://www.ecma-international.org/ecma-262/5.1/#sec-9.12
+	// modern engines have queueMicrotask method
+	if (!queueMicrotask) {
+	  flush = function () {
+	    var parent, fn;
+	    if (IS_NODE$2 && (parent = process$2.domain)) parent.exit();
+	    while (head) {
+	      fn = head.fn;
+	      head = head.next;
+	      try {
+	        fn();
+	      } catch (error) {
+	        if (head) notify$1();
+	        else last = undefined;
+	        throw error;
+	      }
+	    } last = undefined;
+	    if (parent) parent.enter();
+	  };
+
+	  // browsers with MutationObserver, except iOS - https://github.com/zloirock/core-js/issues/339
+	  // also except WebOS Webkit https://github.com/zloirock/core-js/issues/898
+	  if (!IS_IOS && !IS_NODE$2 && !IS_WEBOS_WEBKIT && MutationObserver && document$2) {
+	    toggle = true;
+	    node = document$2.createTextNode('');
+	    new MutationObserver(flush).observe(node, { characterData: true });
+	    notify$1 = function () {
+	      node.data = toggle = !toggle;
+	    };
+	  // environments with maybe non-completely correct, but existent Promise
+	  } else if (Promise$1 && Promise$1.resolve) {
+	    // Promise.resolve without an argument throws an error in LG WebOS 2
+	    promise = Promise$1.resolve(undefined);
+	    // workaround of WebKit ~ iOS Safari 10.1 bug
+	    promise.constructor = Promise$1;
+	    then = promise.then;
+	    notify$1 = function () {
+	      then.call(promise, flush);
+	    };
+	  // Node.js without promises
+	  } else if (IS_NODE$2) {
+	    notify$1 = function () {
+	      process$2.nextTick(flush);
+	    };
+	  // for other environments - macrotask based on:
+	  // - setImmediate
+	  // - MessageChannel
+	  // - window.postMessag
+	  // - onreadystatechange
+	  // - setTimeout
+	  } else {
+	    notify$1 = function () {
+	      // strange IE + webpack dev server bug - use .call(global)
+	      macrotask.call(global$j, flush);
+	    };
+	  }
+	}
 
-	var SameValue = function SameValue(x, y) {
-		if (x === y) { // 0 === -0, but they are not identical.
-			if (x === 0) { return 1 / x === 1 / y; }
-			return true;
-		}
-		return _isNaN(x) && _isNaN(y);
+	var microtask$1 = queueMicrotask || function (fn) {
+	  var task = { fn: fn, next: undefined };
+	  if (last) last.next = task;
+	  if (!head) {
+	    head = task;
+	    notify$1();
+	  } last = task;
 	};
 
-	var $TypeError$6 = GetIntrinsic('%TypeError%');
-
+	var newPromiseCapability$2 = {};
 
+	var aFunction$6 = aFunction$9;
 
+	var PromiseCapability = function (C) {
+	  var resolve, reject;
+	  this.promise = new C(function ($$resolve, $$reject) {
+	    if (resolve !== undefined || reject !== undefined) throw TypeError('Bad Promise constructor');
+	    resolve = $$resolve;
+	    reject = $$reject;
+	  });
+	  this.resolve = aFunction$6(resolve);
+	  this.reject = aFunction$6(reject);
+	};
 
+	// `NewPromiseCapability` abstract operation
+	// https://tc39.es/ecma262/#sec-newpromisecapability
+	newPromiseCapability$2.f = function (C) {
+	  return new PromiseCapability(C);
+	};
 
+	var anObject$b = anObject$m;
+	var isObject$h = isObject$r;
+	var newPromiseCapability$1 = newPromiseCapability$2;
 
+	var promiseResolve$2 = function (C, x) {
+	  anObject$b(C);
+	  if (isObject$h(x) && x.constructor === C) return x;
+	  var promiseCapability = newPromiseCapability$1.f(C);
+	  var resolve = promiseCapability.resolve;
+	  resolve(x);
+	  return promiseCapability.promise;
+	};
 
+	var global$i = global$F;
 
+	var hostReportErrors$1 = function (a, b) {
+	  var console = global$i.console;
+	  if (console && console.error) {
+	    arguments.length === 1 ? console.error(a) : console.error(a, b);
+	  }
+	};
 
+	var perform$1 = function (exec) {
+	  try {
+	    return { error: false, value: exec() };
+	  } catch (error) {
+	    return { error: true, value: error };
+	  }
+	};
+
+	var engineIsBrowser = typeof window == 'object';
+
+	var $$V = _export;
+	var global$h = global$F;
+	var getBuiltIn$3 = getBuiltIn$9;
+	var NativePromise$1 = nativePromiseConstructor;
+	var redefine$8 = redefine$g.exports;
+	var redefineAll$2 = redefineAll$4;
+	var setPrototypeOf$3 = objectSetPrototypeOf;
+	var setToStringTag$5 = setToStringTag$a;
+	var setSpecies$3 = setSpecies$5;
+	var isObject$g = isObject$r;
+	var aFunction$5 = aFunction$9;
+	var anInstance$5 = anInstance$7;
+	var inspectSource = inspectSource$3;
+	var iterate$2 = iterate$3;
+	var checkCorrectnessOfIteration$3 = checkCorrectnessOfIteration$4;
+	var speciesConstructor$6 = speciesConstructor$8;
+	var task = task$1.set;
+	var microtask = microtask$1;
+	var promiseResolve$1 = promiseResolve$2;
+	var hostReportErrors = hostReportErrors$1;
+	var newPromiseCapabilityModule = newPromiseCapability$2;
+	var perform = perform$1;
+	var InternalStateModule$4 = internalState;
+	var isForced$3 = isForced_1;
+	var wellKnownSymbol$a = wellKnownSymbol$s;
+	var IS_BROWSER = engineIsBrowser;
+	var IS_NODE$1 = engineIsNode;
+	var V8_VERSION$1 = engineV8Version;
+
+	var SPECIES$2 = wellKnownSymbol$a('species');
+	var PROMISE = 'Promise';
+	var getInternalState$2 = InternalStateModule$4.get;
+	var setInternalState$4 = InternalStateModule$4.set;
+	var getInternalPromiseState = InternalStateModule$4.getterFor(PROMISE);
+	var NativePromisePrototype = NativePromise$1 && NativePromise$1.prototype;
+	var PromiseConstructor = NativePromise$1;
+	var PromiseConstructorPrototype = NativePromisePrototype;
+	var TypeError$1 = global$h.TypeError;
+	var document$1 = global$h.document;
+	var process$1 = global$h.process;
+	var newPromiseCapability = newPromiseCapabilityModule.f;
+	var newGenericPromiseCapability = newPromiseCapability;
+	var DISPATCH_EVENT = !!(document$1 && document$1.createEvent && global$h.dispatchEvent);
+	var NATIVE_REJECTION_EVENT = typeof PromiseRejectionEvent == 'function';
+	var UNHANDLED_REJECTION = 'unhandledrejection';
+	var REJECTION_HANDLED = 'rejectionhandled';
+	var PENDING = 0;
+	var FULFILLED = 1;
+	var REJECTED = 2;
+	var HANDLED = 1;
+	var UNHANDLED = 2;
+	var SUBCLASSING = false;
+	var Internal, OwnPromiseCapability, PromiseWrapper, nativeThen;
+
+	var FORCED$f = isForced$3(PROMISE, function () {
+	  var GLOBAL_CORE_JS_PROMISE = inspectSource(PromiseConstructor) !== String(PromiseConstructor);
+	  // V8 6.6 (Node 10 and Chrome 66) have a bug with resolving custom thenables
+	  // https://bugs.chromium.org/p/chromium/issues/detail?id=830565
+	  // We can't detect it synchronously, so just check versions
+	  if (!GLOBAL_CORE_JS_PROMISE && V8_VERSION$1 === 66) return true;
+	  // We can't use @@species feature detection in V8 since it causes
+	  // deoptimization and performance degradation
+	  // https://github.com/zloirock/core-js/issues/679
+	  if (V8_VERSION$1 >= 51 && /native code/.test(PromiseConstructor)) return false;
+	  // Detect correctness of subclassing with @@species support
+	  var promise = new PromiseConstructor(function (resolve) { resolve(1); });
+	  var FakePromise = function (exec) {
+	    exec(function () { /* empty */ }, function () { /* empty */ });
+	  };
+	  var constructor = promise.constructor = {};
+	  constructor[SPECIES$2] = FakePromise;
+	  SUBCLASSING = promise.then(function () { /* empty */ }) instanceof FakePromise;
+	  if (!SUBCLASSING) return true;
+	  // Unhandled rejections tracking support, NodeJS Promise without it fails @@species test
+	  return !GLOBAL_CORE_JS_PROMISE && IS_BROWSER && !NATIVE_REJECTION_EVENT;
+	});
 
+	var INCORRECT_ITERATION$1 = FORCED$f || !checkCorrectnessOfIteration$3(function (iterable) {
+	  PromiseConstructor.all(iterable)['catch'](function () { /* empty */ });
+	});
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-createdataproperty
+	// helpers
+	var isThenable = function (it) {
+	  var then;
+	  return isObject$g(it) && typeof (then = it.then) == 'function' ? then : false;
+	};
+
+	var notify = function (state, isReject) {
+	  if (state.notified) return;
+	  state.notified = true;
+	  var chain = state.reactions;
+	  microtask(function () {
+	    var value = state.value;
+	    var ok = state.state == FULFILLED;
+	    var index = 0;
+	    // variable length - can't use forEach
+	    while (chain.length > index) {
+	      var reaction = chain[index++];
+	      var handler = ok ? reaction.ok : reaction.fail;
+	      var resolve = reaction.resolve;
+	      var reject = reaction.reject;
+	      var domain = reaction.domain;
+	      var result, then, exited;
+	      try {
+	        if (handler) {
+	          if (!ok) {
+	            if (state.rejection === UNHANDLED) onHandleUnhandled(state);
+	            state.rejection = HANDLED;
+	          }
+	          if (handler === true) result = value;
+	          else {
+	            if (domain) domain.enter();
+	            result = handler(value); // can throw
+	            if (domain) {
+	              domain.exit();
+	              exited = true;
+	            }
+	          }
+	          if (result === reaction.promise) {
+	            reject(TypeError$1('Promise-chain cycle'));
+	          } else if (then = isThenable(result)) {
+	            then.call(result, resolve, reject);
+	          } else resolve(result);
+	        } else reject(value);
+	      } catch (error) {
+	        if (domain && !exited) domain.exit();
+	        reject(error);
+	      }
+	    }
+	    state.reactions = [];
+	    state.notified = false;
+	    if (isReject && !state.rejection) onUnhandled(state);
+	  });
+	};
 
-	var CreateDataProperty = function CreateDataProperty(O, P, V) {
-		if (Type$1(O) !== 'Object') {
-			throw new $TypeError$6('Assertion failed: Type(O) is not Object');
-		}
-		if (!IsPropertyKey(P)) {
-			throw new $TypeError$6('Assertion failed: IsPropertyKey(P) is not true');
-		}
-		var oldDesc = OrdinaryGetOwnProperty(O, P);
-		var extensible = !oldDesc || IsExtensible(O);
-		var immutable = oldDesc && (!oldDesc['[[Writable]]'] || !oldDesc['[[Configurable]]']);
-		if (immutable || !extensible) {
-			return false;
-		}
-		return DefineOwnProperty(
-			IsDataDescriptor,
-			SameValue,
-			FromPropertyDescriptor,
-			O,
-			P,
-			{
-				'[[Configurable]]': true,
-				'[[Enumerable]]': true,
-				'[[Value]]': V,
-				'[[Writable]]': true
-			}
-		);
+	var dispatchEvent$1 = function (name, promise, reason) {
+	  var event, handler;
+	  if (DISPATCH_EVENT) {
+	    event = document$1.createEvent('Event');
+	    event.promise = promise;
+	    event.reason = reason;
+	    event.initEvent(name, false, true);
+	    global$h.dispatchEvent(event);
+	  } else event = { promise: promise, reason: reason };
+	  if (!NATIVE_REJECTION_EVENT && (handler = global$h['on' + name])) handler(event);
+	  else if (name === UNHANDLED_REJECTION) hostReportErrors('Unhandled promise rejection', reason);
+	};
+
+	var onUnhandled = function (state) {
+	  task.call(global$h, function () {
+	    var promise = state.facade;
+	    var value = state.value;
+	    var IS_UNHANDLED = isUnhandled(state);
+	    var result;
+	    if (IS_UNHANDLED) {
+	      result = perform(function () {
+	        if (IS_NODE$1) {
+	          process$1.emit('unhandledRejection', value, promise);
+	        } else dispatchEvent$1(UNHANDLED_REJECTION, promise, value);
+	      });
+	      // Browsers should not trigger `rejectionHandled` event if it was handled here, NodeJS - should
+	      state.rejection = IS_NODE$1 || isUnhandled(state) ? UNHANDLED : HANDLED;
+	      if (result.error) throw result.value;
+	    }
+	  });
 	};
 
-	var $TypeError$7 = GetIntrinsic('%TypeError%');
+	var isUnhandled = function (state) {
+	  return state.rejection !== HANDLED && !state.parent;
+	};
 
+	var onHandleUnhandled = function (state) {
+	  task.call(global$h, function () {
+	    var promise = state.facade;
+	    if (IS_NODE$1) {
+	      process$1.emit('rejectionHandled', promise);
+	    } else dispatchEvent$1(REJECTION_HANDLED, promise, state.value);
+	  });
+	};
 
+	var bind$8 = function (fn, state, unwrap) {
+	  return function (value) {
+	    fn(state, value, unwrap);
+	  };
+	};
 
+	var internalReject = function (state, value, unwrap) {
+	  if (state.done) return;
+	  state.done = true;
+	  if (unwrap) state = unwrap;
+	  state.value = value;
+	  state.state = REJECTED;
+	  notify(state, true);
+	};
 
+	var internalResolve = function (state, value, unwrap) {
+	  if (state.done) return;
+	  state.done = true;
+	  if (unwrap) state = unwrap;
+	  try {
+	    if (state.facade === value) throw TypeError$1("Promise can't be resolved itself");
+	    var then = isThenable(value);
+	    if (then) {
+	      microtask(function () {
+	        var wrapper = { done: false };
+	        try {
+	          then.call(value,
+	            bind$8(internalResolve, wrapper, state),
+	            bind$8(internalReject, wrapper, state)
+	          );
+	        } catch (error) {
+	          internalReject(wrapper, error, state);
+	        }
+	      });
+	    } else {
+	      state.value = value;
+	      state.state = FULFILLED;
+	      notify(state, false);
+	    }
+	  } catch (error) {
+	    internalReject({ done: false }, error, state);
+	  }
+	};
 
-	// // https://ecma-international.org/ecma-262/6.0/#sec-createdatapropertyorthrow
+	// constructor polyfill
+	if (FORCED$f) {
+	  // 25.4.3.1 Promise(executor)
+	  PromiseConstructor = function Promise(executor) {
+	    anInstance$5(this, PromiseConstructor, PROMISE);
+	    aFunction$5(executor);
+	    Internal.call(this);
+	    var state = getInternalState$2(this);
+	    try {
+	      executor(bind$8(internalResolve, state), bind$8(internalReject, state));
+	    } catch (error) {
+	      internalReject(state, error);
+	    }
+	  };
+	  PromiseConstructorPrototype = PromiseConstructor.prototype;
+	  // eslint-disable-next-line no-unused-vars -- required for `.length`
+	  Internal = function Promise(executor) {
+	    setInternalState$4(this, {
+	      type: PROMISE,
+	      done: false,
+	      notified: false,
+	      parent: false,
+	      reactions: [],
+	      rejection: false,
+	      state: PENDING,
+	      value: undefined
+	    });
+	  };
+	  Internal.prototype = redefineAll$2(PromiseConstructorPrototype, {
+	    // `Promise.prototype.then` method
+	    // https://tc39.es/ecma262/#sec-promise.prototype.then
+	    then: function then(onFulfilled, onRejected) {
+	      var state = getInternalPromiseState(this);
+	      var reaction = newPromiseCapability(speciesConstructor$6(this, PromiseConstructor));
+	      reaction.ok = typeof onFulfilled == 'function' ? onFulfilled : true;
+	      reaction.fail = typeof onRejected == 'function' && onRejected;
+	      reaction.domain = IS_NODE$1 ? process$1.domain : undefined;
+	      state.parent = true;
+	      state.reactions.push(reaction);
+	      if (state.state != PENDING) notify(state, false);
+	      return reaction.promise;
+	    },
+	    // `Promise.prototype.catch` method
+	    // https://tc39.es/ecma262/#sec-promise.prototype.catch
+	    'catch': function (onRejected) {
+	      return this.then(undefined, onRejected);
+	    }
+	  });
+	  OwnPromiseCapability = function () {
+	    var promise = new Internal();
+	    var state = getInternalState$2(promise);
+	    this.promise = promise;
+	    this.resolve = bind$8(internalResolve, state);
+	    this.reject = bind$8(internalReject, state);
+	  };
+	  newPromiseCapabilityModule.f = newPromiseCapability = function (C) {
+	    return C === PromiseConstructor || C === PromiseWrapper
+	      ? new OwnPromiseCapability(C)
+	      : newGenericPromiseCapability(C);
+	  };
 
-	var CreateDataPropertyOrThrow = function CreateDataPropertyOrThrow(O, P, V) {
-		if (Type$1(O) !== 'Object') {
-			throw new $TypeError$7('Assertion failed: Type(O) is not Object');
-		}
-		if (!IsPropertyKey(P)) {
-			throw new $TypeError$7('Assertion failed: IsPropertyKey(P) is not true');
-		}
-		var success = CreateDataProperty(O, P, V);
-		if (!success) {
-			throw new $TypeError$7('unable to create data property');
-		}
-		return success;
-	};
+	  if (typeof NativePromise$1 == 'function' && NativePromisePrototype !== Object.prototype) {
+	    nativeThen = NativePromisePrototype.then;
 
-	var hasMap = typeof Map === 'function' && Map.prototype;
-	var mapSizeDescriptor = Object.getOwnPropertyDescriptor && hasMap ? Object.getOwnPropertyDescriptor(Map.prototype, 'size') : null;
-	var mapSize = hasMap && mapSizeDescriptor && typeof mapSizeDescriptor.get === 'function' ? mapSizeDescriptor.get : null;
-	var mapForEach = hasMap && Map.prototype.forEach;
-	var hasSet = typeof Set === 'function' && Set.prototype;
-	var setSizeDescriptor = Object.getOwnPropertyDescriptor && hasSet ? Object.getOwnPropertyDescriptor(Set.prototype, 'size') : null;
-	var setSize = hasSet && setSizeDescriptor && typeof setSizeDescriptor.get === 'function' ? setSizeDescriptor.get : null;
-	var setForEach = hasSet && Set.prototype.forEach;
-	var booleanValueOf = Boolean.prototype.valueOf;
-	var objectToString$1 = Object.prototype.toString;
+	    if (!SUBCLASSING) {
+	      // make `Promise#then` return a polyfilled `Promise` for native promise-based APIs
+	      redefine$8(NativePromisePrototype, 'then', function then(onFulfilled, onRejected) {
+	        var that = this;
+	        return new PromiseConstructor(function (resolve, reject) {
+	          nativeThen.call(that, resolve, reject);
+	        }).then(onFulfilled, onRejected);
+	      // https://github.com/zloirock/core-js/issues/640
+	      }, { unsafe: true });
 
-	var objectInspect = function inspect_ (obj, opts, depth, seen) {
-	    if (typeof obj === 'undefined') {
-	        return 'undefined';
-	    }
-	    if (obj === null) {
-	        return 'null';
-	    }
-	    if (typeof obj === 'boolean') {
-	        return obj ? 'true' : 'false';
-	    }
-	    if (typeof obj === 'string') {
-	        return inspectString(obj);
-	    }
-	    if (typeof obj === 'number') {
-	      if (obj === 0) {
-	        return Infinity / obj > 0 ? '0' : '-0';
-	      }
-	      return String(obj);
+	      // makes sure that native promise-based APIs `Promise#catch` properly works with patched `Promise#then`
+	      redefine$8(NativePromisePrototype, 'catch', PromiseConstructorPrototype['catch'], { unsafe: true });
 	    }
 
-	    if (!opts) { opts = {}; }
+	    // make `.constructor === Promise` work for native promise-based APIs
+	    try {
+	      delete NativePromisePrototype.constructor;
+	    } catch (error) { /* empty */ }
 
-	    var maxDepth = typeof opts.depth === 'undefined' ? 5 : opts.depth;
-	    if (typeof depth === 'undefined') { depth = 0; }
-	    if (depth >= maxDepth && maxDepth > 0 && typeof obj === 'object') {
-	        return '[Object]';
+	    // make `instanceof Promise` work for native promise-based APIs
+	    if (setPrototypeOf$3) {
+	      setPrototypeOf$3(NativePromisePrototype, PromiseConstructorPrototype);
 	    }
+	  }
+	}
 
-	    if (typeof seen === 'undefined') { seen = []; }
-	    else if (indexOf$2(seen, obj) >= 0) {
-	        return '[Circular]';
-	    }
+	$$V({ global: true, wrap: true, forced: FORCED$f }, {
+	  Promise: PromiseConstructor
+	});
 
-	    function inspect (value, from) {
-	        if (from) {
-	            seen = seen.slice();
-	            seen.push(from);
-	        }
-	        return inspect_(value, opts, depth + 1, seen);
-	    }
+	setToStringTag$5(PromiseConstructor, PROMISE, false);
+	setSpecies$3(PROMISE);
 
-	    if (typeof obj === 'function') {
-	        var name = nameOf(obj);
-	        return '[Function' + (name ? ': ' + name : '') + ']';
-	    }
-	    if (isSymbol$3(obj)) {
-	        var symString = Symbol.prototype.toString.call(obj);
-	        return typeof obj === 'object' ? markBoxed(symString) : symString;
-	    }
-	    if (isElement(obj)) {
-	        var s = '<' + String(obj.nodeName).toLowerCase();
-	        var attrs = obj.attributes || [];
-	        for (var i = 0; i < attrs.length; i++) {
-	            s += ' ' + attrs[i].name + '="' + quote(attrs[i].value) + '"';
-	        }
-	        s += '>';
-	        if (obj.childNodes && obj.childNodes.length) { s += '...'; }
-	        s += '</' + String(obj.nodeName).toLowerCase() + '>';
-	        return s;
-	    }
-	    if (isArray$3(obj)) {
-	        if (obj.length === 0) { return '[]'; }
-	        return '[ ' + arrObjKeys(obj, inspect).join(', ') + ' ]';
-	    }
-	    if (isError(obj)) {
-	        var parts = arrObjKeys(obj, inspect);
-	        if (parts.length === 0) { return '[' + String(obj) + ']'; }
-	        return '{ [' + String(obj) + '] ' + parts.join(', ') + ' }';
-	    }
-	    if (typeof obj === 'object' && typeof obj.inspect === 'function') {
-	        return obj.inspect();
-	    }
-	    if (isMap(obj)) {
-	        var parts = [];
-	        mapForEach.call(obj, function (value, key) {
-	            parts.push(inspect(key, obj) + ' => ' + inspect(value, obj));
-	        });
-	        return collectionOf('Map', mapSize.call(obj), parts);
-	    }
-	    if (isSet(obj)) {
-	        var parts = [];
-	        setForEach.call(obj, function (value ) {
-	            parts.push(inspect(value, obj));
-	        });
-	        return collectionOf('Set', setSize.call(obj), parts);
-	    }
-	    if (isNumber(obj)) {
-	        return markBoxed(Number(obj));
-	    }
-	    if (isBoolean(obj)) {
-	        return markBoxed(booleanValueOf.call(obj));
-	    }
-	    if (isString$1(obj)) {
-	        return markBoxed(inspect(String(obj)));
-	    }
-	    if (!isDate(obj) && !isRegExp(obj)) {
-	        var xs = arrObjKeys(obj, inspect);
-	        if (xs.length === 0) { return '{}'; }
-	        return '{ ' + xs.join(', ') + ' }';
-	    }
-	    return String(obj);
-	};
+	PromiseWrapper = getBuiltIn$3(PROMISE);
 
-	function quote (s) {
-	    return String(s).replace(/"/g, '&quot;');
-	}
+	// statics
+	$$V({ target: PROMISE, stat: true, forced: FORCED$f }, {
+	  // `Promise.reject` method
+	  // https://tc39.es/ecma262/#sec-promise.reject
+	  reject: function reject(r) {
+	    var capability = newPromiseCapability(this);
+	    capability.reject.call(undefined, r);
+	    return capability.promise;
+	  }
+	});
 
-	function isArray$3 (obj) { return toStr$8(obj) === '[object Array]' }
-	function isDate (obj) { return toStr$8(obj) === '[object Date]' }
-	function isRegExp (obj) { return toStr$8(obj) === '[object RegExp]' }
-	function isError (obj) { return toStr$8(obj) === '[object Error]' }
-	function isSymbol$3 (obj) { return toStr$8(obj) === '[object Symbol]' }
-	function isString$1 (obj) { return toStr$8(obj) === '[object String]' }
-	function isNumber (obj) { return toStr$8(obj) === '[object Number]' }
-	function isBoolean (obj) { return toStr$8(obj) === '[object Boolean]' }
+	$$V({ target: PROMISE, stat: true, forced: FORCED$f }, {
+	  // `Promise.resolve` method
+	  // https://tc39.es/ecma262/#sec-promise.resolve
+	  resolve: function resolve(x) {
+	    return promiseResolve$1(this, x);
+	  }
+	});
 
-	var hasOwn = Object.prototype.hasOwnProperty || function (key) { return key in this; };
-	function has$1 (obj, key) {
-	    return hasOwn.call(obj, key);
-	}
+	$$V({ target: PROMISE, stat: true, forced: INCORRECT_ITERATION$1 }, {
+	  // `Promise.all` method
+	  // https://tc39.es/ecma262/#sec-promise.all
+	  all: function all(iterable) {
+	    var C = this;
+	    var capability = newPromiseCapability(C);
+	    var resolve = capability.resolve;
+	    var reject = capability.reject;
+	    var result = perform(function () {
+	      var $promiseResolve = aFunction$5(C.resolve);
+	      var values = [];
+	      var counter = 0;
+	      var remaining = 1;
+	      iterate$2(iterable, function (promise) {
+	        var index = counter++;
+	        var alreadyCalled = false;
+	        values.push(undefined);
+	        remaining++;
+	        $promiseResolve.call(C, promise).then(function (value) {
+	          if (alreadyCalled) return;
+	          alreadyCalled = true;
+	          values[index] = value;
+	          --remaining || resolve(values);
+	        }, reject);
+	      });
+	      --remaining || resolve(values);
+	    });
+	    if (result.error) reject(result.value);
+	    return capability.promise;
+	  },
+	  // `Promise.race` method
+	  // https://tc39.es/ecma262/#sec-promise.race
+	  race: function race(iterable) {
+	    var C = this;
+	    var capability = newPromiseCapability(C);
+	    var reject = capability.reject;
+	    var result = perform(function () {
+	      var $promiseResolve = aFunction$5(C.resolve);
+	      iterate$2(iterable, function (promise) {
+	        $promiseResolve.call(C, promise).then(capability.resolve, reject);
+	      });
+	    });
+	    if (result.error) reject(result.value);
+	    return capability.promise;
+	  }
+	});
 
-	function toStr$8 (obj) {
-	    return objectToString$1.call(obj);
-	}
+	var typedArrayConstructor = {exports: {}};
+
+	/* eslint-disable no-new -- required for testing */
+
+	var global$g = global$F;
+	var fails$y = fails$N;
+	var checkCorrectnessOfIteration$2 = checkCorrectnessOfIteration$4;
+	var NATIVE_ARRAY_BUFFER_VIEWS$1 = arrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;
+
+	var ArrayBuffer$2 = global$g.ArrayBuffer;
+	var Int8Array$2 = global$g.Int8Array;
+
+	var typedArrayConstructorsRequireWrappers = !NATIVE_ARRAY_BUFFER_VIEWS$1 || !fails$y(function () {
+	  Int8Array$2(1);
+	}) || !fails$y(function () {
+	  new Int8Array$2(-1);
+	}) || !checkCorrectnessOfIteration$2(function (iterable) {
+	  new Int8Array$2();
+	  new Int8Array$2(null);
+	  new Int8Array$2(1.5);
+	  new Int8Array$2(iterable);
+	}, true) || fails$y(function () {
+	  // Safari (11+) bug - a reason why even Safari 13 should load a typed array polyfill
+	  return new Int8Array$2(new ArrayBuffer$2(2), 1, undefined).length !== 1;
+	});
 
-	function nameOf (f) {
-	    if (f.name) { return f.name; }
-	    var m = String(f).match(/^function\s*([\w$]+)/);
-	    if (m) { return m[1]; }
-	}
+	var toInteger$5 = toInteger$b;
 
-	function indexOf$2 (xs, x) {
-	    if (xs.indexOf) { return xs.indexOf(x); }
-	    for (var i = 0, l = xs.length; i < l; i++) {
-	        if (xs[i] === x) { return i; }
-	    }
-	    return -1;
-	}
+	var toPositiveInteger$1 = function (it) {
+	  var result = toInteger$5(it);
+	  if (result < 0) throw RangeError("The argument can't be less than 0");
+	  return result;
+	};
 
-	function isMap (x) {
-	    if (!mapSize) {
-	        return false;
-	    }
-	    try {
-	        mapSize.call(x);
-	        try {
-	            setSize.call(x);
-	        } catch (s) {
-	            return true;
-	        }
-	        return x instanceof Map; // core-js workaround, pre-v2.5.0
-	    } catch (e) {}
-	    return false;
-	}
+	var toPositiveInteger = toPositiveInteger$1;
 
-	function isSet (x) {
-	    if (!setSize) {
-	        return false;
-	    }
-	    try {
-	        setSize.call(x);
-	        try {
-	            mapSize.call(x);
-	        } catch (m) {
-	            return true;
-	        }
-	        return x instanceof Set; // core-js workaround, pre-v2.5.0
-	    } catch (e) {}
-	    return false;
-	}
+	var toOffset$2 = function (it, BYTES) {
+	  var offset = toPositiveInteger(it);
+	  if (offset % BYTES) throw RangeError('Wrong offset');
+	  return offset;
+	};
 
-	function isElement (x) {
-	    if (!x || typeof x !== 'object') { return false; }
-	    if (typeof HTMLElement !== 'undefined' && x instanceof HTMLElement) {
-	        return true;
+	var toObject$c = toObject$i;
+	var toLength$i = toLength$q;
+	var getIteratorMethod$3 = getIteratorMethod$5;
+	var isArrayIteratorMethod$1 = isArrayIteratorMethod$3;
+	var bind$7 = functionBindContext;
+	var aTypedArrayConstructor$4 = arrayBufferViewCore.aTypedArrayConstructor;
+
+	var typedArrayFrom$2 = function from(source /* , mapfn, thisArg */) {
+	  var O = toObject$c(source);
+	  var argumentsLength = arguments.length;
+	  var mapfn = argumentsLength > 1 ? arguments[1] : undefined;
+	  var mapping = mapfn !== undefined;
+	  var iteratorMethod = getIteratorMethod$3(O);
+	  var i, length, result, step, iterator, next;
+	  if (iteratorMethod != undefined && !isArrayIteratorMethod$1(iteratorMethod)) {
+	    iterator = iteratorMethod.call(O);
+	    next = iterator.next;
+	    O = [];
+	    while (!(step = next.call(iterator)).done) {
+	      O.push(step.value);
 	    }
-	    return typeof x.nodeName === 'string'
-	        && typeof x.getAttribute === 'function'
-	    ;
-	}
+	  }
+	  if (mapping && argumentsLength > 2) {
+	    mapfn = bind$7(mapfn, arguments[2], 2);
+	  }
+	  length = toLength$i(O.length);
+	  result = new (aTypedArrayConstructor$4(this))(length);
+	  for (i = 0; length > i; i++) {
+	    result[i] = mapping ? mapfn(O[i], i) : O[i];
+	  }
+	  return result;
+	};
 
-	function inspectString (str) {
-	    var s = str.replace(/(['\\])/g, '\\$1').replace(/[\x00-\x1f]/g, lowbyte);
-	    return "'" + s + "'";
-	}
+	var isObject$f = isObject$r;
+	var setPrototypeOf$2 = objectSetPrototypeOf;
+
+	// makes subclassing work correct for wrapped built-ins
+	var inheritIfRequired$4 = function ($this, dummy, Wrapper) {
+	  var NewTarget, NewTargetPrototype;
+	  if (
+	    // it can work only with native `setPrototypeOf`
+	    setPrototypeOf$2 &&
+	    // we haven't completely correct pre-ES6 way for getting `new.target`, so use this
+	    typeof (NewTarget = dummy.constructor) == 'function' &&
+	    NewTarget !== Wrapper &&
+	    isObject$f(NewTargetPrototype = NewTarget.prototype) &&
+	    NewTargetPrototype !== Wrapper.prototype
+	  ) setPrototypeOf$2($this, NewTargetPrototype);
+	  return $this;
+	};
+
+	var $$U = _export;
+	var global$f = global$F;
+	var DESCRIPTORS$c = descriptors;
+	var TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS$1 = typedArrayConstructorsRequireWrappers;
+	var ArrayBufferViewCore$m = arrayBufferViewCore;
+	var ArrayBufferModule = arrayBuffer;
+	var anInstance$4 = anInstance$7;
+	var createPropertyDescriptor$2 = createPropertyDescriptor$7;
+	var createNonEnumerableProperty$2 = createNonEnumerableProperty$e;
+	var toLength$h = toLength$q;
+	var toIndex = toIndex$2;
+	var toOffset$1 = toOffset$2;
+	var toPrimitive$3 = toPrimitive$7;
+	var has$5 = has$j;
+	var classof$5 = classof$b;
+	var isObject$e = isObject$r;
+	var create$9 = objectCreate;
+	var setPrototypeOf$1 = objectSetPrototypeOf;
+	var getOwnPropertyNames$2 = objectGetOwnPropertyNames.f;
+	var typedArrayFrom$1 = typedArrayFrom$2;
+	var forEach$1 = arrayIteration.forEach;
+	var setSpecies$2 = setSpecies$5;
+	var definePropertyModule$1 = objectDefineProperty;
+	var getOwnPropertyDescriptorModule$1 = objectGetOwnPropertyDescriptor;
+	var InternalStateModule$3 = internalState;
+	var inheritIfRequired$3 = inheritIfRequired$4;
+
+	var getInternalState$1 = InternalStateModule$3.get;
+	var setInternalState$3 = InternalStateModule$3.set;
+	var nativeDefineProperty = definePropertyModule$1.f;
+	var nativeGetOwnPropertyDescriptor$1 = getOwnPropertyDescriptorModule$1.f;
+	var round = Math.round;
+	var RangeError$1 = global$f.RangeError;
+	var ArrayBuffer$1 = ArrayBufferModule.ArrayBuffer;
+	var DataView$1 = ArrayBufferModule.DataView;
+	var NATIVE_ARRAY_BUFFER_VIEWS = ArrayBufferViewCore$m.NATIVE_ARRAY_BUFFER_VIEWS;
+	var TYPED_ARRAY_TAG = ArrayBufferViewCore$m.TYPED_ARRAY_TAG;
+	var TypedArray = ArrayBufferViewCore$m.TypedArray;
+	var TypedArrayPrototype = ArrayBufferViewCore$m.TypedArrayPrototype;
+	var aTypedArrayConstructor$3 = ArrayBufferViewCore$m.aTypedArrayConstructor;
+	var isTypedArray = ArrayBufferViewCore$m.isTypedArray;
+	var BYTES_PER_ELEMENT = 'BYTES_PER_ELEMENT';
+	var WRONG_LENGTH = 'Wrong length';
+
+	var fromList = function (C, list) {
+	  var index = 0;
+	  var length = list.length;
+	  var result = new (aTypedArrayConstructor$3(C))(length);
+	  while (length > index) result[index] = list[index++];
+	  return result;
+	};
 
-	function lowbyte (c) {
-	    var n = c.charCodeAt(0);
-	    var x = { 8: 'b', 9: 't', 10: 'n', 12: 'f', 13: 'r' }[n];
-	    if (x) { return '\\' + x; }
-	    return '\\x' + (n < 0x10 ? '0' : '') + n.toString(16);
-	}
+	var addGetter = function (it, key) {
+	  nativeDefineProperty(it, key, { get: function () {
+	    return getInternalState$1(this)[key];
+	  } });
+	};
 
-	function markBoxed (str) {
-	    return 'Object(' + str + ')';
-	}
+	var isArrayBuffer = function (it) {
+	  var klass;
+	  return it instanceof ArrayBuffer$1 || (klass = classof$5(it)) == 'ArrayBuffer' || klass == 'SharedArrayBuffer';
+	};
 
-	function collectionOf (type, size, entries) {
-	    return type + ' (' + size + ') {' + entries.join(', ') + '}';
-	}
+	var isTypedArrayIndex = function (target, key) {
+	  return isTypedArray(target)
+	    && typeof key != 'symbol'
+	    && key in target
+	    && String(+key) == String(key);
+	};
 
-	function arrObjKeys (obj, inspect) {
-	    var isArr = isArray$3(obj);
-	    var xs = [];
-	    if (isArr) {
-	        xs.length = obj.length;
-	        for (var i = 0; i < obj.length; i++) {
-	            xs[i] = has$1(obj, i) ? inspect(obj[i], obj) : '';
-	        }
-	    }
-	    for (var key in obj) {
-	        if (!has$1(obj, key)) { continue; }
-	        if (isArr && String(Number(key)) === key && key < obj.length) { continue; }
-	        if (/[^\w$]/.test(key)) {
-	            xs.push(inspect(key, obj) + ': ' + inspect(obj[key], obj));
-	        } else {
-	            xs.push(key + ': ' + inspect(obj[key], obj));
-	        }
-	    }
-	    return xs;
-	}
+	var wrappedGetOwnPropertyDescriptor = function getOwnPropertyDescriptor(target, key) {
+	  return isTypedArrayIndex(target, key = toPrimitive$3(key, true))
+	    ? createPropertyDescriptor$2(2, target[key])
+	    : nativeGetOwnPropertyDescriptor$1(target, key);
+	};
 
-	var $TypeError$8 = GetIntrinsic('%TypeError%');
+	var wrappedDefineProperty = function defineProperty(target, key, descriptor) {
+	  if (isTypedArrayIndex(target, key = toPrimitive$3(key, true))
+	    && isObject$e(descriptor)
+	    && has$5(descriptor, 'value')
+	    && !has$5(descriptor, 'get')
+	    && !has$5(descriptor, 'set')
+	    // TODO: add validation descriptor w/o calling accessors
+	    && !descriptor.configurable
+	    && (!has$5(descriptor, 'writable') || descriptor.writable)
+	    && (!has$5(descriptor, 'enumerable') || descriptor.enumerable)
+	  ) {
+	    target[key] = descriptor.value;
+	    return target;
+	  } return nativeDefineProperty(target, key, descriptor);
+	};
 
+	if (DESCRIPTORS$c) {
+	  if (!NATIVE_ARRAY_BUFFER_VIEWS) {
+	    getOwnPropertyDescriptorModule$1.f = wrappedGetOwnPropertyDescriptor;
+	    definePropertyModule$1.f = wrappedDefineProperty;
+	    addGetter(TypedArrayPrototype, 'buffer');
+	    addGetter(TypedArrayPrototype, 'byteOffset');
+	    addGetter(TypedArrayPrototype, 'byteLength');
+	    addGetter(TypedArrayPrototype, 'length');
+	  }
 
+	  $$U({ target: 'Object', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS }, {
+	    getOwnPropertyDescriptor: wrappedGetOwnPropertyDescriptor,
+	    defineProperty: wrappedDefineProperty
+	  });
 
+	  typedArrayConstructor.exports = function (TYPE, wrapper, CLAMPED) {
+	    var BYTES = TYPE.match(/\d+$/)[0] / 8;
+	    var CONSTRUCTOR_NAME = TYPE + (CLAMPED ? 'Clamped' : '') + 'Array';
+	    var GETTER = 'get' + TYPE;
+	    var SETTER = 'set' + TYPE;
+	    var NativeTypedArrayConstructor = global$f[CONSTRUCTOR_NAME];
+	    var TypedArrayConstructor = NativeTypedArrayConstructor;
+	    var TypedArrayConstructorPrototype = TypedArrayConstructor && TypedArrayConstructor.prototype;
+	    var exported = {};
 
+	    var getter = function (that, index) {
+	      var data = getInternalState$1(that);
+	      return data.view[GETTER](index * BYTES + data.byteOffset, true);
+	    };
 
+	    var setter = function (that, index, value) {
+	      var data = getInternalState$1(that);
+	      if (CLAMPED) value = (value = round(value)) < 0 ? 0 : value > 0xFF ? 0xFF : value & 0xFF;
+	      data.view[SETTER](index * BYTES + data.byteOffset, value, true);
+	    };
 
-	/**
-	 * 7.3.1 Get (O, P) - https://ecma-international.org/ecma-262/6.0/#sec-get-o-p
-	 * 1. Assert: Type(O) is Object.
-	 * 2. Assert: IsPropertyKey(P) is true.
-	 * 3. Return O.[[Get]](P, O).
-	 */
+	    var addElement = function (that, index) {
+	      nativeDefineProperty(that, index, {
+	        get: function () {
+	          return getter(this, index);
+	        },
+	        set: function (value) {
+	          return setter(this, index, value);
+	        },
+	        enumerable: true
+	      });
+	    };
 
-	var Get = function Get(O, P) {
-		// 7.3.1.1
-		if (Type$1(O) !== 'Object') {
-			throw new $TypeError$8('Assertion failed: Type(O) is not Object');
-		}
-		// 7.3.1.2
-		if (!IsPropertyKey(P)) {
-			throw new $TypeError$8('Assertion failed: IsPropertyKey(P) is not true, got ' + objectInspect(P));
-		}
-		// 7.3.1.3
-		return O[P];
-	};
+	    if (!NATIVE_ARRAY_BUFFER_VIEWS) {
+	      TypedArrayConstructor = wrapper(function (that, data, offset, $length) {
+	        anInstance$4(that, TypedArrayConstructor, CONSTRUCTOR_NAME);
+	        var index = 0;
+	        var byteOffset = 0;
+	        var buffer, byteLength, length;
+	        if (!isObject$e(data)) {
+	          length = toIndex(data);
+	          byteLength = length * BYTES;
+	          buffer = new ArrayBuffer$1(byteLength);
+	        } else if (isArrayBuffer(data)) {
+	          buffer = data;
+	          byteOffset = toOffset$1(offset, BYTES);
+	          var $len = data.byteLength;
+	          if ($length === undefined) {
+	            if ($len % BYTES) throw RangeError$1(WRONG_LENGTH);
+	            byteLength = $len - byteOffset;
+	            if (byteLength < 0) throw RangeError$1(WRONG_LENGTH);
+	          } else {
+	            byteLength = toLength$h($length) * BYTES;
+	            if (byteLength + byteOffset > $len) throw RangeError$1(WRONG_LENGTH);
+	          }
+	          length = byteLength / BYTES;
+	        } else if (isTypedArray(data)) {
+	          return fromList(TypedArrayConstructor, data);
+	        } else {
+	          return typedArrayFrom$1.call(TypedArrayConstructor, data);
+	        }
+	        setInternalState$3(that, {
+	          buffer: buffer,
+	          byteOffset: byteOffset,
+	          byteLength: byteLength,
+	          length: length,
+	          view: new DataView$1(buffer)
+	        });
+	        while (index < length) addElement(that, index++);
+	      });
 
-	var $TypeError$9 = GetIntrinsic('%TypeError%');
-
-	var isPropertyDescriptor = function IsPropertyDescriptor(ES, Desc) {
-		if (ES.Type(Desc) !== 'Object') {
-			return false;
-		}
-		var allowed = {
-			'[[Configurable]]': true,
-			'[[Enumerable]]': true,
-			'[[Get]]': true,
-			'[[Set]]': true,
-			'[[Value]]': true,
-			'[[Writable]]': true
-		};
-
-		for (var key in Desc) { // eslint-disable-line no-restricted-syntax
-			if (src(Desc, key) && !allowed[key]) {
-				return false;
-			}
-		}
-
-		if (ES.IsDataDescriptor(Desc) && ES.IsAccessorDescriptor(Desc)) {
-			throw new $TypeError$9('Property Descriptors may not be both accessor and data descriptors');
-		}
-		return true;
-	};
+	      if (setPrototypeOf$1) setPrototypeOf$1(TypedArrayConstructor, TypedArray);
+	      TypedArrayConstructorPrototype = TypedArrayConstructor.prototype = create$9(TypedArrayPrototype);
+	    } else if (TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS$1) {
+	      TypedArrayConstructor = wrapper(function (dummy, data, typedArrayOffset, $length) {
+	        anInstance$4(dummy, TypedArrayConstructor, CONSTRUCTOR_NAME);
+	        return inheritIfRequired$3(function () {
+	          if (!isObject$e(data)) return new NativeTypedArrayConstructor(toIndex(data));
+	          if (isArrayBuffer(data)) return $length !== undefined
+	            ? new NativeTypedArrayConstructor(data, toOffset$1(typedArrayOffset, BYTES), $length)
+	            : typedArrayOffset !== undefined
+	              ? new NativeTypedArrayConstructor(data, toOffset$1(typedArrayOffset, BYTES))
+	              : new NativeTypedArrayConstructor(data);
+	          if (isTypedArray(data)) return fromList(TypedArrayConstructor, data);
+	          return typedArrayFrom$1.call(TypedArrayConstructor, data);
+	        }(), dummy, TypedArrayConstructor);
+	      });
+
+	      if (setPrototypeOf$1) setPrototypeOf$1(TypedArrayConstructor, TypedArray);
+	      forEach$1(getOwnPropertyNames$2(NativeTypedArrayConstructor), function (key) {
+	        if (!(key in TypedArrayConstructor)) {
+	          createNonEnumerableProperty$2(TypedArrayConstructor, key, NativeTypedArrayConstructor[key]);
+	        }
+	      });
+	      TypedArrayConstructor.prototype = TypedArrayConstructorPrototype;
+	    }
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-isaccessordescriptor
+	    if (TypedArrayConstructorPrototype.constructor !== TypedArrayConstructor) {
+	      createNonEnumerableProperty$2(TypedArrayConstructorPrototype, 'constructor', TypedArrayConstructor);
+	    }
 
-	var IsAccessorDescriptor = function IsAccessorDescriptor(Desc) {
-		if (typeof Desc === 'undefined') {
-			return false;
-		}
+	    if (TYPED_ARRAY_TAG) {
+	      createNonEnumerableProperty$2(TypedArrayConstructorPrototype, TYPED_ARRAY_TAG, CONSTRUCTOR_NAME);
+	    }
 
-		assertRecord(Type$1, 'Property Descriptor', 'Desc', Desc);
+	    exported[CONSTRUCTOR_NAME] = TypedArrayConstructor;
 
-		if (!src(Desc, '[[Get]]') && !src(Desc, '[[Set]]')) {
-			return false;
-		}
+	    $$U({
+	      global: true, forced: TypedArrayConstructor != NativeTypedArrayConstructor, sham: !NATIVE_ARRAY_BUFFER_VIEWS
+	    }, exported);
 
-		return true;
-	};
+	    if (!(BYTES_PER_ELEMENT in TypedArrayConstructor)) {
+	      createNonEnumerableProperty$2(TypedArrayConstructor, BYTES_PER_ELEMENT, BYTES);
+	    }
 
-	var $TypeError$a = GetIntrinsic('%TypeError%');
+	    if (!(BYTES_PER_ELEMENT in TypedArrayConstructorPrototype)) {
+	      createNonEnumerableProperty$2(TypedArrayConstructorPrototype, BYTES_PER_ELEMENT, BYTES);
+	    }
 
+	    setSpecies$2(CONSTRUCTOR_NAME);
+	  };
+	} else typedArrayConstructor.exports = function () { /* empty */ };
 
+	var createTypedArrayConstructor$1 = typedArrayConstructor.exports;
 
+	// `Uint8Array` constructor
+	// https://tc39.es/ecma262/#sec-typedarray-objects
+	createTypedArrayConstructor$1('Uint8', function (init) {
+	  return function Uint8Array(data, byteOffset, length) {
+	    return init(this, data, byteOffset, length);
+	  };
+	});
 
+	var toObject$b = toObject$i;
+	var toAbsoluteIndex$4 = toAbsoluteIndex$8;
+	var toLength$g = toLength$q;
+
+	var min$7 = Math.min;
+
+	// `Array.prototype.copyWithin` method implementation
+	// https://tc39.es/ecma262/#sec-array.prototype.copywithin
+	// eslint-disable-next-line es/no-array-prototype-copywithin -- safe
+	var arrayCopyWithin = [].copyWithin || function copyWithin(target /* = 0 */, start /* = 0, end = @length */) {
+	  var O = toObject$b(this);
+	  var len = toLength$g(O.length);
+	  var to = toAbsoluteIndex$4(target, len);
+	  var from = toAbsoluteIndex$4(start, len);
+	  var end = arguments.length > 2 ? arguments[2] : undefined;
+	  var count = min$7((end === undefined ? len : toAbsoluteIndex$4(end, len)) - from, len - to);
+	  var inc = 1;
+	  if (from < to && to < from + count) {
+	    inc = -1;
+	    from += count - 1;
+	    to += count - 1;
+	  }
+	  while (count-- > 0) {
+	    if (from in O) O[to] = O[from];
+	    else delete O[to];
+	    to += inc;
+	    from += inc;
+	  } return O;
+	};
+
+	var ArrayBufferViewCore$l = arrayBufferViewCore;
+	var $copyWithin = arrayCopyWithin;
+
+	var aTypedArray$l = ArrayBufferViewCore$l.aTypedArray;
+	var exportTypedArrayMethod$m = ArrayBufferViewCore$l.exportTypedArrayMethod;
+
+	// `%TypedArray%.prototype.copyWithin` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.copywithin
+	exportTypedArrayMethod$m('copyWithin', function copyWithin(target, start /* , end */) {
+	  return $copyWithin.call(aTypedArray$l(this), target, start, arguments.length > 2 ? arguments[2] : undefined);
+	});
 
+	var ArrayBufferViewCore$k = arrayBufferViewCore;
+	var $every$1 = arrayIteration.every;
 
+	var aTypedArray$k = ArrayBufferViewCore$k.aTypedArray;
+	var exportTypedArrayMethod$l = ArrayBufferViewCore$k.exportTypedArrayMethod;
 
+	// `%TypedArray%.prototype.every` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.every
+	exportTypedArrayMethod$l('every', function every(callbackfn /* , thisArg */) {
+	  return $every$1(aTypedArray$k(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	});
 
+	var ArrayBufferViewCore$j = arrayBufferViewCore;
+	var $fill = arrayFill$1;
 
+	var aTypedArray$j = ArrayBufferViewCore$j.aTypedArray;
+	var exportTypedArrayMethod$k = ArrayBufferViewCore$j.exportTypedArrayMethod;
 
+	// `%TypedArray%.prototype.fill` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.fill
+	// eslint-disable-next-line no-unused-vars -- required for `.length`
+	exportTypedArrayMethod$k('fill', function fill(value /* , start, end */) {
+	  return $fill.apply(aTypedArray$j(this), arguments);
+	});
 
+	var aTypedArrayConstructor$2 = arrayBufferViewCore.aTypedArrayConstructor;
+	var speciesConstructor$5 = speciesConstructor$8;
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-definepropertyorthrow
+	var typedArrayFromSpeciesAndList = function (instance, list) {
+	  var C = speciesConstructor$5(instance, instance.constructor);
+	  var index = 0;
+	  var length = list.length;
+	  var result = new (aTypedArrayConstructor$2(C))(length);
+	  while (length > index) result[index] = list[index++];
+	  return result;
+	};
 
-	var DefinePropertyOrThrow = function DefinePropertyOrThrow(O, P, desc) {
-		if (Type$1(O) !== 'Object') {
-			throw new $TypeError$a('Assertion failed: Type(O) is not Object');
-		}
+	var ArrayBufferViewCore$i = arrayBufferViewCore;
+	var $filter$1 = arrayIteration.filter;
+	var fromSpeciesAndList = typedArrayFromSpeciesAndList;
 
-		if (!IsPropertyKey(P)) {
-			throw new $TypeError$a('Assertion failed: IsPropertyKey(P) is not true');
-		}
+	var aTypedArray$i = ArrayBufferViewCore$i.aTypedArray;
+	var exportTypedArrayMethod$j = ArrayBufferViewCore$i.exportTypedArrayMethod;
 
-		var Desc = isPropertyDescriptor({
-			Type: Type$1,
-			IsDataDescriptor: IsDataDescriptor,
-			IsAccessorDescriptor: IsAccessorDescriptor
-		}, desc) ? desc : ToPropertyDescriptor(desc);
-		if (!isPropertyDescriptor({
-			Type: Type$1,
-			IsDataDescriptor: IsDataDescriptor,
-			IsAccessorDescriptor: IsAccessorDescriptor
-		}, Desc)) {
-			throw new $TypeError$a('Assertion failed: Desc is not a valid Property Descriptor');
-		}
+	// `%TypedArray%.prototype.filter` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.filter
+	exportTypedArrayMethod$j('filter', function filter(callbackfn /* , thisArg */) {
+	  var list = $filter$1(aTypedArray$i(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	  return fromSpeciesAndList(this, list);
+	});
 
-		return DefineOwnProperty(
-			IsDataDescriptor,
-			SameValue,
-			FromPropertyDescriptor,
-			O,
-			P,
-			Desc
-		);
-	};
+	var ArrayBufferViewCore$h = arrayBufferViewCore;
+	var $find$1 = arrayIteration.find;
 
-	var IsConstructor = createCommonjsModule(function (module) {
+	var aTypedArray$h = ArrayBufferViewCore$h.aTypedArray;
+	var exportTypedArrayMethod$i = ArrayBufferViewCore$h.exportTypedArrayMethod;
 
+	// `%TypedArray%.prototype.find` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.find
+	exportTypedArrayMethod$i('find', function find(predicate /* , thisArg */) {
+	  return $find$1(aTypedArray$h(this), predicate, arguments.length > 1 ? arguments[1] : undefined);
+	});
 
+	var ArrayBufferViewCore$g = arrayBufferViewCore;
+	var $findIndex$1 = arrayIteration.findIndex;
 
-	var $construct = GetIntrinsic('%Reflect.construct%', true);
+	var aTypedArray$g = ArrayBufferViewCore$g.aTypedArray;
+	var exportTypedArrayMethod$h = ArrayBufferViewCore$g.exportTypedArrayMethod;
 
-	var DefinePropertyOrThrow$1 = DefinePropertyOrThrow;
-	try {
-		DefinePropertyOrThrow$1({}, '', { '[[Get]]': function () {} });
-	} catch (e) {
-		// Accessor properties aren't supported
-		DefinePropertyOrThrow$1 = null;
-	}
-
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-isconstructor
-
-	if (DefinePropertyOrThrow$1 && $construct) {
-		var isConstructorMarker = {};
-		var badArrayLike = {};
-		DefinePropertyOrThrow$1(badArrayLike, 'length', {
-			'[[Get]]': function () {
-				throw isConstructorMarker;
-			},
-			'[[Enumerable]]': true
-		});
-
-		module.exports = function IsConstructor(argument) {
-			try {
-				// `Reflect.construct` invokes `IsConstructor(target)` before `Get(args, 'length')`:
-				$construct(argument, badArrayLike);
-			} catch (err) {
-				return err === isConstructorMarker;
-			}
-		};
-	} else {
-		module.exports = function IsConstructor(argument) {
-			// unfortunately there's no way to truly check this without try/catch `new argument` in old environments
-			return typeof argument === 'function' && !!argument.prototype;
-		};
-	}
+	// `%TypedArray%.prototype.findIndex` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.findindex
+	exportTypedArrayMethod$h('findIndex', function findIndex(predicate /* , thisArg */) {
+	  return $findIndex$1(aTypedArray$g(this), predicate, arguments.length > 1 ? arguments[1] : undefined);
 	});
 
-	var $String = GetIntrinsic('%String%');
-	var $TypeError$b = GetIntrinsic('%TypeError%');
+	var ArrayBufferViewCore$f = arrayBufferViewCore;
+	var $forEach = arrayIteration.forEach;
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-tostring
+	var aTypedArray$f = ArrayBufferViewCore$f.aTypedArray;
+	var exportTypedArrayMethod$g = ArrayBufferViewCore$f.exportTypedArrayMethod;
 
-	var ToString = function ToString(argument) {
-		if (typeof argument === 'symbol') {
-			throw new $TypeError$b('Cannot convert a Symbol value to a string');
-		}
-		return $String(argument);
-	};
+	// `%TypedArray%.prototype.forEach` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.foreach
+	exportTypedArrayMethod$g('forEach', function forEach(callbackfn /* , thisArg */) {
+	  $forEach(aTypedArray$f(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	});
 
-	var hasToStringTag$3 = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';
-	var toStr$9 = Object.prototype.toString;
+	var ArrayBufferViewCore$e = arrayBufferViewCore;
+	var $includes$1 = arrayIncludes.includes;
 
-	var isStandardArguments = function isArguments(value) {
-		if (hasToStringTag$3 && value && typeof value === 'object' && Symbol.toStringTag in value) {
-			return false;
-		}
-		return toStr$9.call(value) === '[object Arguments]';
-	};
+	var aTypedArray$e = ArrayBufferViewCore$e.aTypedArray;
+	var exportTypedArrayMethod$f = ArrayBufferViewCore$e.exportTypedArrayMethod;
 
-	var isLegacyArguments = function isArguments(value) {
-		if (isStandardArguments(value)) {
-			return true;
-		}
-		return value !== null &&
-			typeof value === 'object' &&
-			typeof value.length === 'number' &&
-			value.length >= 0 &&
-			toStr$9.call(value) !== '[object Array]' &&
-			toStr$9.call(value.callee) === '[object Function]';
-	};
+	// `%TypedArray%.prototype.includes` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.includes
+	exportTypedArrayMethod$f('includes', function includes(searchElement /* , fromIndex */) {
+	  return $includes$1(aTypedArray$e(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);
+	});
 
-	var supportsStandardArguments = (function () {
-		return isStandardArguments(arguments);
-	}());
+	var ArrayBufferViewCore$d = arrayBufferViewCore;
+	var $indexOf = arrayIncludes.indexOf;
 
-	isStandardArguments.isLegacyArguments = isLegacyArguments; // for tests
+	var aTypedArray$d = ArrayBufferViewCore$d.aTypedArray;
+	var exportTypedArrayMethod$e = ArrayBufferViewCore$d.exportTypedArrayMethod;
 
-	var isArguments$2 = supportsStandardArguments ? isStandardArguments : isLegacyArguments;
+	// `%TypedArray%.prototype.indexOf` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.indexof
+	exportTypedArrayMethod$e('indexOf', function indexOf(searchElement /* , fromIndex */) {
+	  return $indexOf(aTypedArray$d(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);
+	});
 
-	var toString = {}.toString;
+	var global$e = global$F;
+	var ArrayBufferViewCore$c = arrayBufferViewCore;
+	var ArrayIterators = es_array_iterator;
+	var wellKnownSymbol$9 = wellKnownSymbol$s;
 
-	var isarray = Array.isArray || function (arr) {
-	  return toString.call(arr) == '[object Array]';
-	};
+	var ITERATOR$2 = wellKnownSymbol$9('iterator');
+	var Uint8Array$2 = global$e.Uint8Array;
+	var arrayValues = ArrayIterators.values;
+	var arrayKeys = ArrayIterators.keys;
+	var arrayEntries = ArrayIterators.entries;
+	var aTypedArray$c = ArrayBufferViewCore$c.aTypedArray;
+	var exportTypedArrayMethod$d = ArrayBufferViewCore$c.exportTypedArrayMethod;
+	var nativeTypedArrayIterator = Uint8Array$2 && Uint8Array$2.prototype[ITERATOR$2];
 
-	var strValue = String.prototype.valueOf;
-	var tryStringObject = function tryStringObject(value) {
-		try {
-			strValue.call(value);
-			return true;
-		} catch (e) {
-			return false;
-		}
-	};
-	var toStr$a = Object.prototype.toString;
-	var strClass = '[object String]';
-	var hasToStringTag$4 = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';
-
-	var isString$2 = function isString(value) {
-		if (typeof value === 'string') {
-			return true;
-		}
-		if (typeof value !== 'object') {
-			return false;
-		}
-		return hasToStringTag$4 ? tryStringObject(value) : toStr$a.call(value) === strClass;
-	};
+	var CORRECT_ITER_NAME = !!nativeTypedArrayIterator
+	  && (nativeTypedArrayIterator.name == 'values' || nativeTypedArrayIterator.name == undefined);
 
-	var $Map = typeof Map === 'function' && Map.prototype ? Map : null;
-	var $Set = typeof Set === 'function' && Set.prototype ? Set : null;
-
-	var exported;
-
-	if (!$Map) {
-		// eslint-disable-next-line no-unused-vars
-		exported = function isMap(x) {
-			// `Map` is not present in this environment.
-			return false;
-		};
-	}
-
-	var $mapHas = $Map ? Map.prototype.has : null;
-	var $setHas = $Set ? Set.prototype.has : null;
-	if (!exported && !$mapHas) {
-		// eslint-disable-next-line no-unused-vars
-		exported = function isMap(x) {
-			// `Map` does not have a `has` method
-			return false;
-		};
-	}
-
-	var isMap$1 = exported || function isMap(x) {
-		if (!x || typeof x !== 'object') {
-			return false;
-		}
-		try {
-			$mapHas.call(x);
-			if ($setHas) {
-				try {
-					$setHas.call(x);
-				} catch (e) {
-					return true;
-				}
-			}
-			return x instanceof $Map; // core-js workaround, pre-v2.5.0
-		} catch (e$1) {}
-		return false;
+	var typedArrayValues = function values() {
+	  return arrayValues.call(aTypedArray$c(this));
 	};
 
-	var $Map$1 = typeof Map === 'function' && Map.prototype ? Map : null;
-	var $Set$1 = typeof Set === 'function' && Set.prototype ? Set : null;
-
-	var exported$1;
-
-	if (!$Set$1) {
-		// eslint-disable-next-line no-unused-vars
-		exported$1 = function isSet(x) {
-			// `Set` is not present in this environment.
-			return false;
-		};
-	}
-
-	var $mapHas$1 = $Map$1 ? Map.prototype.has : null;
-	var $setHas$1 = $Set$1 ? Set.prototype.has : null;
-	if (!exported$1 && !$setHas$1) {
-		// eslint-disable-next-line no-unused-vars
-		exported$1 = function isSet(x) {
-			// `Set` does not have a `has` method
-			return false;
-		};
-	}
-
-	var isSet$1 = exported$1 || function isSet(x) {
-		if (!x || typeof x !== 'object') {
-			return false;
-		}
-		try {
-			$setHas$1.call(x);
-			if ($mapHas$1) {
-				try {
-					$mapHas$1.call(x);
-				} catch (e) {
-					return true;
-				}
-			}
-			return x instanceof $Set$1; // core-js workaround, pre-v2.5.0
-		} catch (e$1) {}
-		return false;
-	};
+	// `%TypedArray%.prototype.entries` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.entries
+	exportTypedArrayMethod$d('entries', function entries() {
+	  return arrayEntries.call(aTypedArray$c(this));
+	});
+	// `%TypedArray%.prototype.keys` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.keys
+	exportTypedArrayMethod$d('keys', function keys() {
+	  return arrayKeys.call(aTypedArray$c(this));
+	});
+	// `%TypedArray%.prototype.values` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.values
+	exportTypedArrayMethod$d('values', typedArrayValues, !CORRECT_ITER_NAME);
+	// `%TypedArray%.prototype[@@iterator]` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype-@@iterator
+	exportTypedArrayMethod$d(ITERATOR$2, typedArrayValues, !CORRECT_ITER_NAME);
+
+	var ArrayBufferViewCore$b = arrayBufferViewCore;
+
+	var aTypedArray$b = ArrayBufferViewCore$b.aTypedArray;
+	var exportTypedArrayMethod$c = ArrayBufferViewCore$b.exportTypedArrayMethod;
+	var $join = [].join;
+
+	// `%TypedArray%.prototype.join` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.join
+	// eslint-disable-next-line no-unused-vars -- required for `.length`
+	exportTypedArrayMethod$c('join', function join(separator) {
+	  return $join.apply(aTypedArray$b(this), arguments);
+	});
 
-	var esGetIterator = createCommonjsModule(function (module) {
+	/* eslint-disable es/no-array-prototype-lastindexof -- safe */
+	var toIndexedObject$4 = toIndexedObject$b;
+	var toInteger$4 = toInteger$b;
+	var toLength$f = toLength$q;
+	var arrayMethodIsStrict$5 = arrayMethodIsStrict$8;
+
+	var min$6 = Math.min;
+	var $lastIndexOf$1 = [].lastIndexOf;
+	var NEGATIVE_ZERO = !!$lastIndexOf$1 && 1 / [1].lastIndexOf(1, -0) < 0;
+	var STRICT_METHOD$5 = arrayMethodIsStrict$5('lastIndexOf');
+	var FORCED$e = NEGATIVE_ZERO || !STRICT_METHOD$5;
+
+	// `Array.prototype.lastIndexOf` method implementation
+	// https://tc39.es/ecma262/#sec-array.prototype.lastindexof
+	var arrayLastIndexOf = FORCED$e ? function lastIndexOf(searchElement /* , fromIndex = @[*-1] */) {
+	  // convert -0 to +0
+	  if (NEGATIVE_ZERO) return $lastIndexOf$1.apply(this, arguments) || 0;
+	  var O = toIndexedObject$4(this);
+	  var length = toLength$f(O.length);
+	  var index = length - 1;
+	  if (arguments.length > 1) index = min$6(index, toInteger$4(arguments[1]));
+	  if (index < 0) index = length + index;
+	  for (;index >= 0; index--) if (index in O && O[index] === searchElement) return index || 0;
+	  return -1;
+	} : $lastIndexOf$1;
 
-	/* eslint global-require: 0 */
-	// the code is structured this way so that bundlers can
-	// alias out `has-symbols` to `() => true` or `() => false` if your target
-	// environments' Symbol capabilities are known, and then use
-	// dead code elimination on the rest of this module.
-	//
-	// Similarly, `isarray` can be aliased to `Array.isArray` if
-	// available in all target environments.
-
-
-
-	if (hasSymbols$1() || shams()) {
-		var $iterator = Symbol.iterator;
-		// Symbol is available natively or shammed
-		// natively:
-		//  - Chrome >= 38
-		//  - Edge 12-14?, Edge >= 15 for sure
-		//  - FF >= 36
-		//  - Safari >= 9
-		//  - node >= 0.12
-		module.exports = function getIterator(iterable) {
-			// alternatively, `iterable[$iterator]?.()`
-			if (iterable != null && typeof iterable[$iterator] !== 'undefined') {
-				return iterable[$iterator]();
-			}
-			if (isArguments$2(iterable)) {
-				// arguments objects lack Symbol.iterator
-				// - node 0.12
-				return Array.prototype[$iterator].call(iterable);
-			}
-		};
-	} else {
-		// Symbol is not available, native or shammed
-		var isArray = isarray;
-		var isString = isString$2;
-		var GetIntrinsic$1 = GetIntrinsic;
-		var $Map = GetIntrinsic$1('%Map%', true);
-		var $Set = GetIntrinsic$1('%Set%', true);
-		var callBound$1 = callBound;
-		var $arrayPush = callBound$1('Array.prototype.push');
-		var $charCodeAt = callBound$1('String.prototype.charCodeAt');
-		var $stringSlice = callBound$1('String.prototype.slice');
-
-		var advanceStringIndex = function advanceStringIndex(S, index) {
-			var length = S.length;
-			if ((index + 1) >= length) {
-				return index + 1;
-			}
-
-			var first = $charCodeAt(S, index);
-			if (first < 0xD800 || first > 0xDBFF) {
-				return index + 1;
-			}
-
-			var second = $charCodeAt(S, index + 1);
-			if (second < 0xDC00 || second > 0xDFFF) {
-				return index + 1;
-			}
-
-			return index + 2;
-		};
-
-		var getArrayIterator = function getArrayIterator(arraylike) {
-			var i = 0;
-			return {
-				next: function next() {
-					var done = i >= arraylike.length;
-					var value;
-					if (!done) {
-						value = arraylike[i];
-						i += 1;
-					}
-					return {
-						done: done,
-						value: value
-					};
-				}
-			};
-		};
-
-		var getNonCollectionIterator = function getNonCollectionIterator(iterable) {
-			if (isArray(iterable) || isArguments$2(iterable)) {
-				return getArrayIterator(iterable);
-			}
-			if (isString(iterable)) {
-				var i = 0;
-				return {
-					next: function next() {
-						var nextIndex = advanceStringIndex(iterable, i);
-						var value = $stringSlice(iterable, i, nextIndex);
-						i = nextIndex;
-						return {
-							done: nextIndex > iterable.length,
-							value: value
-						};
-					}
-				};
-			}
-		};
-
-		if (!$Map && !$Set) {
-			// the only language iterables are Array, String, arguments
-			// - Safari <= 6.0
-			// - Chrome < 38
-			// - node < 0.12
-			// - FF < 13
-			// - IE < 11
-			// - Edge < 11
-
-			module.exports = getNonCollectionIterator;
-		} else {
-			// either Map or Set are available, but Symbol is not
-			// - es6-shim on an ES5 browser
-			// - Safari 6.2 (maybe 6.1?)
-			// - FF v[13, 36)
-			// - IE 11
-			// - Edge 11
-			// - Safari v[6, 9)
-
-			var isMap = isMap$1;
-			var isSet = isSet$1;
-
-			// Firefox >= 27, IE 11, Safari 6.2 - 9, Edge 11, es6-shim in older envs, all have forEach
-			var $mapForEach = callBound$1('Map.prototype.forEach', true);
-			var $setForEach = callBound$1('Set.prototype.forEach', true);
-			if (typeof process === 'undefined' || !process.versions || !process.versions.node) { // "if is not node"
-
-				// Firefox 17 - 26 has `.iterator()`, whose iterator `.next()` either
-				// returns a value, or throws a StopIteration object. These browsers
-				// do not have any other mechanism for iteration.
-				var $mapIterator = callBound$1('Map.prototype.iterator', true);
-				var $setIterator = callBound$1('Set.prototype.iterator', true);
-				var getStopIterationIterator = function (iterator) {
-					var done = false;
-					return {
-						next: function next() {
-							try {
-								return {
-									done: done,
-									value: done ? undefined : iterator.next()
-								};
-							} catch (e) {
-								done = true;
-								return {
-									done: true,
-									value: undefined
-								};
-							}
-						}
-					};
-				};
-			}
-			// Firefox 27-35, and some older es6-shim versions, use a string "@@iterator" property
-			// this returns a proper iterator object, so we should use it instead of forEach.
-			// newer es6-shim versions use a string "_es6-shim iterator_" property.
-			var $mapAtAtIterator = callBound$1('Map.prototype.@@iterator', true) || callBound$1('Map.prototype._es6-shim iterator_', true);
-			var $setAtAtIterator = callBound$1('Set.prototype.@@iterator', true) || callBound$1('Set.prototype._es6-shim iterator_', true);
-
-			var getCollectionIterator = function getCollectionIterator(iterable) {
-				if (isMap(iterable)) {
-					if ($mapIterator) {
-						return getStopIterationIterator($mapIterator(iterable));
-					}
-					if ($mapAtAtIterator) {
-						return $mapAtAtIterator(iterable);
-					}
-					if ($mapForEach) {
-						var entries = [];
-						$mapForEach(iterable, function (v, k) {
-							$arrayPush(entries, [k, v]);
-						});
-						return getArrayIterator(entries);
-					}
-				}
-				if (isSet(iterable)) {
-					if ($setIterator) {
-						return getStopIterationIterator($setIterator(iterable));
-					}
-					if ($setAtAtIterator) {
-						return $setAtAtIterator(iterable);
-					}
-					if ($setForEach) {
-						var values = [];
-						$setForEach(iterable, function (v) {
-							$arrayPush(values, v);
-						});
-						return getArrayIterator(values);
-					}
-				}
-			};
-
-			module.exports = function getIterator(iterable) {
-				return getCollectionIterator(iterable) || getNonCollectionIterator(iterable);
-			};
-		}
-	}
-	});
+	var ArrayBufferViewCore$a = arrayBufferViewCore;
+	var $lastIndexOf = arrayLastIndexOf;
 
-	var $TypeError$c = TypeError;
-
-	// eslint-disable-next-line consistent-return
-	var iterateIterator = function iterateIterator(iterator) {
-		if (!iterator || typeof iterator.next !== 'function') {
-			throw new $TypeError$c('iterator must be an object with a `next` method');
-		}
-		if (arguments.length > 1) {
-			var callback = arguments[1];
-			if (typeof callback !== 'function') {
-				throw new $TypeError$c('`callback`, if provided, must be a function');
-			}
-		}
-		var values = callback || [];
-		var result;
-		while ((result = iterator.next()) && !result.done) {
-			if (callback) {
-				callback(result.value); // eslint-disable-line callback-return
-			} else {
-				values.push(result.value);
-			}
-		}
-		if (!callback) {
-			return values;
-		}
-	};
+	var aTypedArray$a = ArrayBufferViewCore$a.aTypedArray;
+	var exportTypedArrayMethod$b = ArrayBufferViewCore$a.exportTypedArrayMethod;
 
-	var $TypeError$d = TypeError;
+	// `%TypedArray%.prototype.lastIndexOf` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.lastindexof
+	// eslint-disable-next-line no-unused-vars -- required for `.length`
+	exportTypedArrayMethod$b('lastIndexOf', function lastIndexOf(searchElement /* , fromIndex */) {
+	  return $lastIndexOf.apply(aTypedArray$a(this), arguments);
+	});
 
+	var ArrayBufferViewCore$9 = arrayBufferViewCore;
+	var $map = arrayIteration.map;
+	var speciesConstructor$4 = speciesConstructor$8;
 
-	var iterateValue = function iterateValue(iterable) {
-		var iterator = esGetIterator(iterable);
-		if (!iterator) {
-			throw new $TypeError$d('non-iterable value provided');
-		}
-		if (arguments.length > 1) {
-			return iterateIterator(iterator, arguments[1]);
-		}
-		return iterateIterator(iterator);
-	};
+	var aTypedArray$9 = ArrayBufferViewCore$9.aTypedArray;
+	var aTypedArrayConstructor$1 = ArrayBufferViewCore$9.aTypedArrayConstructor;
+	var exportTypedArrayMethod$a = ArrayBufferViewCore$9.exportTypedArrayMethod;
 
-	var implementation$5 = function from(items) {
-		var C = this;
-		if (items === null || typeof items === 'undefined') {
-			throw new TypeError('`Array.from` requires an array-like object, not `null` or `undefined`');
-		}
-		var mapFn, T;
-		if (typeof arguments[1] !== 'undefined') {
-			mapFn = arguments[1];
-			if (!IsCallable(mapFn)) {
-				throw new TypeError('When provided, the second argument to `Array.from` must be a function');
-			}
-			if (arguments.length > 2) {
-				T = arguments[2];
-			}
-		}
-
-		var values;
-		try {
-			values = iterateValue(items);
-		} catch (e) {
-			values = items;
-		}
-
-		var arrayLike = ToObject(values);
-		var len = ToLength(arrayLike.length);
-		var A = IsConstructor(C) ? ToObject(new C(len)) : new Array(len);
-		var k = 0;
-		var kValue, mappedValue;
-
-		while (k < len) {
-			var Pk = ToString(k);
-			kValue = Get(arrayLike, Pk);
-			if (mapFn) {
-				mappedValue = typeof T === 'undefined' ? mapFn(kValue, k) : Call(mapFn, T, [kValue, k]);
-			} else {
-				mappedValue = kValue;
-			}
-			CreateDataPropertyOrThrow(A, Pk, mappedValue);
-			k += 1;
-		}
-		A.length = len;
-		return A;
-	};
+	// `%TypedArray%.prototype.map` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.map
+	exportTypedArrayMethod$a('map', function map(mapfn /* , thisArg */) {
+	  return $map(aTypedArray$9(this), mapfn, arguments.length > 1 ? arguments[1] : undefined, function (O, length) {
+	    return new (aTypedArrayConstructor$1(speciesConstructor$4(O, O.constructor)))(length);
+	  });
+	});
 
-	var tryCall = function (fn) {
-		try {
-			return fn();
-		} catch (e) {
-			return false;
-		}
+	var aFunction$4 = aFunction$9;
+	var toObject$a = toObject$i;
+	var IndexedObject$2 = indexedObject;
+	var toLength$e = toLength$q;
+
+	// `Array.prototype.{ reduce, reduceRight }` methods implementation
+	var createMethod$3 = function (IS_RIGHT) {
+	  return function (that, callbackfn, argumentsLength, memo) {
+	    aFunction$4(callbackfn);
+	    var O = toObject$a(that);
+	    var self = IndexedObject$2(O);
+	    var length = toLength$e(O.length);
+	    var index = IS_RIGHT ? length - 1 : 0;
+	    var i = IS_RIGHT ? -1 : 1;
+	    if (argumentsLength < 2) while (true) {
+	      if (index in self) {
+	        memo = self[index];
+	        index += i;
+	        break;
+	      }
+	      index += i;
+	      if (IS_RIGHT ? index < 0 : length <= index) {
+	        throw TypeError('Reduce of empty array with no initial value');
+	      }
+	    }
+	    for (;IS_RIGHT ? index >= 0 : length > index; index += i) if (index in self) {
+	      memo = callbackfn(memo, self[index], index, O);
+	    }
+	    return memo;
+	  };
 	};
 
-	var polyfill$8 = function getPolyfill() {
-		if (IsCallable(Array.from)) {
-			var handlesUndefMapper = tryCall(function () {
-				// Microsoft Edge v0.11 throws if the mapFn argument is *provided* but undefined,
-				// but the spec doesn't care if it's provided or not - undefined doesn't throw.
-				return Array.from([0], undefined);
-			});
-			if (!handlesUndefMapper) {
-				var origArrayFrom = Array.from;
-				return function from(items) {
-					/* eslint no-invalid-this: 0 */
-					if (arguments.length > 1 && typeof arguments[1] !== 'undefined') {
-						return Call(origArrayFrom, this, arguments);
-					} else {
-						return Call(origArrayFrom, this, [items]);
-					}
-				};
-			}
-			var implemented = tryCall(function () {
-				// Detects a Firefox bug in v32
-				// https://bugzilla.mozilla.org/show_bug.cgi?id=1063993
-				return Array.from({ 'length': -1 }) === 0;
-			})
-			&& tryCall(function () {
-				// Detects a bug in Webkit nightly r181886
-				var arr = Array.from([0].entries());
-				return arr.length === 1 && IsArray(arr[0]) && arr[0][0] === 0 && arr[0][1] === 0;
-			})
-			&& tryCall(function () {
-				return Array.from({ 'length': -Infinity });
-			});
-			if (implemented) {
-				return Array.from;
-			}
-		}
-
-		return implementation$5;
+	var arrayReduce = {
+	  // `Array.prototype.reduce` method
+	  // https://tc39.es/ecma262/#sec-array.prototype.reduce
+	  left: createMethod$3(false),
+	  // `Array.prototype.reduceRight` method
+	  // https://tc39.es/ecma262/#sec-array.prototype.reduceright
+	  right: createMethod$3(true)
 	};
 
-	var shim$a = function shimArrayFrom() {
-		var polyfill = polyfill$8();
+	var ArrayBufferViewCore$8 = arrayBufferViewCore;
+	var $reduce$1 = arrayReduce.left;
 
-		defineProperties_1(Array, { 'from': polyfill }, {
-			'from': function () {
-				return Array.from !== polyfill;
-			}
-		});
+	var aTypedArray$8 = ArrayBufferViewCore$8.aTypedArray;
+	var exportTypedArrayMethod$9 = ArrayBufferViewCore$8.exportTypedArrayMethod;
 
-		return polyfill;
-	};
+	// `%TypedArray%.prototype.reduce` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.reduce
+	exportTypedArrayMethod$9('reduce', function reduce(callbackfn /* , initialValue */) {
+	  return $reduce$1(aTypedArray$8(this), callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
+	});
 
-	var polyfill$9 = polyfill$8();
+	var ArrayBufferViewCore$7 = arrayBufferViewCore;
+	var $reduceRight = arrayReduce.right;
 
-	// eslint-disable-next-line no-unused-vars
-	var boundFromShim = function from(items) {
-		// eslint-disable-next-line no-invalid-this
-		return polyfill$9.apply(this || Array, arguments);
-	};
+	var aTypedArray$7 = ArrayBufferViewCore$7.aTypedArray;
+	var exportTypedArrayMethod$8 = ArrayBufferViewCore$7.exportTypedArrayMethod;
 
-	defineProperties_1(boundFromShim, {
-		'getPolyfill': polyfill$8,
-		'implementation': implementation$5,
-		'shim': shim$a
+	// `%TypedArray%.prototype.reduceRicht` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.reduceright
+	exportTypedArrayMethod$8('reduceRight', function reduceRight(callbackfn /* , initialValue */) {
+	  return $reduceRight(aTypedArray$7(this), callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
 	});
 
-	var array_from = boundFromShim;
+	var ArrayBufferViewCore$6 = arrayBufferViewCore;
 
-	var $isEnumerable$2 = callBound('Object.prototype.propertyIsEnumerable');
+	var aTypedArray$6 = ArrayBufferViewCore$6.aTypedArray;
+	var exportTypedArrayMethod$7 = ArrayBufferViewCore$6.exportTypedArrayMethod;
+	var floor$5 = Math.floor;
 
-	var implementation$6 = function values(O) {
-		var obj = RequireObjectCoercible(O);
-		var vals = [];
-		for (var key in obj) {
-			if (src(obj, key) && $isEnumerable$2(obj, key)) {
-				vals.push(obj[key]);
-			}
-		}
-		return vals;
-	};
+	// `%TypedArray%.prototype.reverse` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.reverse
+	exportTypedArrayMethod$7('reverse', function reverse() {
+	  var that = this;
+	  var length = aTypedArray$6(that).length;
+	  var middle = floor$5(length / 2);
+	  var index = 0;
+	  var value;
+	  while (index < middle) {
+	    value = that[index];
+	    that[index++] = that[--length];
+	    that[length] = value;
+	  } return that;
+	});
 
-	var polyfill$a = function getPolyfill() {
-		return typeof Object.values === 'function' ? Object.values : implementation$6;
-	};
+	var ArrayBufferViewCore$5 = arrayBufferViewCore;
+	var toLength$d = toLength$q;
+	var toOffset = toOffset$2;
+	var toObject$9 = toObject$i;
+	var fails$x = fails$N;
 
-	var shim$b = function shimValues() {
-		var polyfill = polyfill$a();
-		defineProperties_1(Object, { values: polyfill }, {
-			values: function testValues() {
-				return Object.values !== polyfill;
-			}
-		});
-		return polyfill;
-	};
+	var aTypedArray$5 = ArrayBufferViewCore$5.aTypedArray;
+	var exportTypedArrayMethod$6 = ArrayBufferViewCore$5.exportTypedArrayMethod;
 
-	var polyfill$b = polyfill$a();
+	var FORCED$d = fails$x(function () {
+	  // eslint-disable-next-line es/no-typed-arrays -- required for testing
+	  new Int8Array(1).set({});
+	});
 
-	defineProperties_1(polyfill$b, {
-		getPolyfill: polyfill$a,
-		implementation: implementation$6,
-		shim: shim$b
+	// `%TypedArray%.prototype.set` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.set
+	exportTypedArrayMethod$6('set', function set(arrayLike /* , offset */) {
+	  aTypedArray$5(this);
+	  var offset = toOffset(arguments.length > 1 ? arguments[1] : undefined, 1);
+	  var length = this.length;
+	  var src = toObject$9(arrayLike);
+	  var len = toLength$d(src.length);
+	  var index = 0;
+	  if (len + offset > length) throw RangeError('Wrong length');
+	  while (index < len) this[offset + index] = src[index++];
+	}, FORCED$d);
+
+	var ArrayBufferViewCore$4 = arrayBufferViewCore;
+	var speciesConstructor$3 = speciesConstructor$8;
+	var fails$w = fails$N;
+
+	var aTypedArray$4 = ArrayBufferViewCore$4.aTypedArray;
+	var aTypedArrayConstructor = ArrayBufferViewCore$4.aTypedArrayConstructor;
+	var exportTypedArrayMethod$5 = ArrayBufferViewCore$4.exportTypedArrayMethod;
+	var $slice$1 = [].slice;
+
+	var FORCED$c = fails$w(function () {
+	  // eslint-disable-next-line es/no-typed-arrays -- required for testing
+	  new Int8Array(1).slice();
 	});
 
-	var object_values = polyfill$b;
+	// `%TypedArray%.prototype.slice` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.slice
+	exportTypedArrayMethod$5('slice', function slice(start, end) {
+	  var list = $slice$1.call(aTypedArray$4(this), start, end);
+	  var C = speciesConstructor$3(this, this.constructor);
+	  var index = 0;
+	  var length = list.length;
+	  var result = new (aTypedArrayConstructor(C))(length);
+	  while (length > index) result[index] = list[index++];
+	  return result;
+	}, FORCED$c);
 
-	// modified from https://github.com/es-shims/es6-shim
+	var ArrayBufferViewCore$3 = arrayBufferViewCore;
+	var $some$1 = arrayIteration.some;
 
+	var aTypedArray$3 = ArrayBufferViewCore$3.aTypedArray;
+	var exportTypedArrayMethod$4 = ArrayBufferViewCore$3.exportTypedArrayMethod;
 
-	var canBeObject = function (obj) {
-		return typeof obj !== 'undefined' && obj !== null;
-	};
-	var hasSymbols$5 = shams();
-	var toObject = Object;
-	var push = functionBind.call(Function.call, Array.prototype.push);
-	var propIsEnumerable = functionBind.call(Function.call, Object.prototype.propertyIsEnumerable);
-	var originalGetSymbols = hasSymbols$5 ? Object.getOwnPropertySymbols : null;
-
-	var implementation$7 = function assign(target, source1) {
-		var arguments$1 = arguments;
-
-		if (!canBeObject(target)) { throw new TypeError('target must be an object'); }
-		var objTarget = toObject(target);
-		var s, source, i, props, syms, value, key;
-		for (s = 1; s < arguments.length; ++s) {
-			source = toObject(arguments$1[s]);
-			props = objectKeys(source);
-			var getSymbols = hasSymbols$5 && (Object.getOwnPropertySymbols || originalGetSymbols);
-			if (getSymbols) {
-				syms = getSymbols(source);
-				for (i = 0; i < syms.length; ++i) {
-					key = syms[i];
-					if (propIsEnumerable(source, key)) {
-						push(props, key);
-					}
-				}
-			}
-			for (i = 0; i < props.length; ++i) {
-				key = props[i];
-				value = source[key];
-				if (propIsEnumerable(source, key)) {
-					objTarget[key] = value;
-				}
-			}
-		}
-		return objTarget;
-	};
+	// `%TypedArray%.prototype.some` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.some
+	exportTypedArrayMethod$4('some', function some(callbackfn /* , thisArg */) {
+	  return $some$1(aTypedArray$3(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	});
 
-	var lacksProperEnumerationOrder = function () {
-		if (!Object.assign) {
-			return false;
-		}
-		// v8, specifically in node 4.x, has a bug with incorrect property enumeration order
-		// note: this does not detect the bug unless there's 20 characters
-		var str = 'abcdefghijklmnopqrst';
-		var letters = str.split('');
-		var map = {};
-		for (var i = 0; i < letters.length; ++i) {
-			map[letters[i]] = letters[i];
-		}
-		var obj = Object.assign({}, map);
-		var actual = '';
-		for (var k in obj) {
-			actual += k;
-		}
-		return str !== actual;
-	};
+	// TODO: use something more complex like timsort?
+	var floor$4 = Math.floor;
 
-	var assignHasPendingExceptions = function () {
-		if (!Object.assign || !Object.preventExtensions) {
-			return false;
-		}
-		// Firefox 37 still has "pending exception" logic in its Object.assign implementation,
-		// which is 72% slower than our shim, and Firefox 40's native implementation.
-		var thrower = Object.preventExtensions({ 1: 2 });
-		try {
-			Object.assign(thrower, 'xy');
-		} catch (e) {
-			return thrower[1] === 'y';
-		}
-		return false;
+	var mergeSort = function (array, comparefn) {
+	  var length = array.length;
+	  var middle = floor$4(length / 2);
+	  return length < 8 ? insertionSort(array, comparefn) : merge$5(
+	    mergeSort(array.slice(0, middle), comparefn),
+	    mergeSort(array.slice(middle), comparefn),
+	    comparefn
+	  );
 	};
 
-	var polyfill$c = function getPolyfill() {
-		if (!Object.assign) {
-			return implementation$7;
-		}
-		if (lacksProperEnumerationOrder()) {
-			return implementation$7;
-		}
-		if (assignHasPendingExceptions()) {
-			return implementation$7;
-		}
-		return Object.assign;
+	var insertionSort = function (array, comparefn) {
+	  var length = array.length;
+	  var i = 1;
+	  var element, j;
+
+	  while (i < length) {
+	    j = i;
+	    element = array[i];
+	    while (j && comparefn(array[j - 1], element) > 0) {
+	      array[j] = array[--j];
+	    }
+	    if (j !== i++) array[j] = element;
+	  } return array;
 	};
 
-	var shim$c = function shimAssign() {
-		var polyfill = polyfill$c();
-		defineProperties_1(
-			Object,
-			{ assign: polyfill },
-			{ assign: function () { return Object.assign !== polyfill; } }
-		);
-		return polyfill;
+	var merge$5 = function (left, right, comparefn) {
+	  var llength = left.length;
+	  var rlength = right.length;
+	  var lindex = 0;
+	  var rindex = 0;
+	  var result = [];
+
+	  while (lindex < llength || rindex < rlength) {
+	    if (lindex < llength && rindex < rlength) {
+	      result.push(comparefn(left[lindex], right[rindex]) <= 0 ? left[lindex++] : right[rindex++]);
+	    } else {
+	      result.push(lindex < llength ? left[lindex++] : right[rindex++]);
+	    }
+	  } return result;
 	};
 
-	var polyfill$d = polyfill$c();
+	var arraySort = mergeSort;
 
-	defineProperties_1(polyfill$d, {
-		getPolyfill: polyfill$c,
-		implementation: implementation$7,
-		shim: shim$c
-	});
+	var userAgent$2 = engineUserAgent;
 
-	var object_assign = polyfill$d;
+	var firefox = userAgent$2.match(/firefox\/(\d+)/i);
 
-	/**
-	 * @this {Promise}
-	 */
-	function finallyConstructor(callback) {
-	  var constructor = this.constructor;
-	  return this.then(
-	    function(value) {
-	      // @ts-ignore
-	      return constructor.resolve(callback()).then(function() {
-	        return value;
-	      });
-	    },
-	    function(reason) {
-	      // @ts-ignore
-	      return constructor.resolve(callback()).then(function() {
-	        // @ts-ignore
-	        return constructor.reject(reason);
-	      });
-	    }
-	  );
-	}
+	var engineFfVersion = !!firefox && +firefox[1];
 
-	// Store setTimeout reference so promise-polyfill will be unaffected by
-	// other code modifying setTimeout (like sinon.useFakeTimers())
-	var setTimeoutFunc = setTimeout;
+	var UA = engineUserAgent;
 
-	function isArray$4(x) {
-	  return Boolean(x && typeof x.length !== 'undefined');
-	}
+	var engineIsIeOrEdge = /MSIE|Trident/.test(UA);
 
-	function noop$1() {}
+	var userAgent$1 = engineUserAgent;
 
-	// Polyfill for Function.prototype.bind
-	function bind$2(fn, thisArg) {
-	  return function() {
-	    fn.apply(thisArg, arguments);
-	  };
-	}
+	var webkit = userAgent$1.match(/AppleWebKit\/(\d+)\./);
 
-	/**
-	 * @constructor
-	 * @param {Function} fn
-	 */
-	function Promise$1(fn) {
-	  if (!(this instanceof Promise$1))
-	    { throw new TypeError('Promises must be constructed via new'); }
-	  if (typeof fn !== 'function') { throw new TypeError('not a function'); }
-	  /** @type {!number} */
-	  this._state = 0;
-	  /** @type {!boolean} */
-	  this._handled = false;
-	  /** @type {Promise|undefined} */
-	  this._value = undefined;
-	  /** @type {!Array<!Function>} */
-	  this._deferreds = [];
-
-	  doResolve(fn, this);
-	}
-
-	function handle(self, deferred) {
-	  while (self._state === 3) {
-	    self = self._value;
-	  }
-	  if (self._state === 0) {
-	    self._deferreds.push(deferred);
-	    return;
+	var engineWebkitVersion = !!webkit && +webkit[1];
+
+	var ArrayBufferViewCore$2 = arrayBufferViewCore;
+	var global$d = global$F;
+	var fails$v = fails$N;
+	var aFunction$3 = aFunction$9;
+	var toLength$c = toLength$q;
+	var internalSort$1 = arraySort;
+	var FF$1 = engineFfVersion;
+	var IE_OR_EDGE$1 = engineIsIeOrEdge;
+	var V8$1 = engineV8Version;
+	var WEBKIT$1 = engineWebkitVersion;
+
+	var aTypedArray$2 = ArrayBufferViewCore$2.aTypedArray;
+	var exportTypedArrayMethod$3 = ArrayBufferViewCore$2.exportTypedArrayMethod;
+	var Uint16Array = global$d.Uint16Array;
+	var nativeSort$1 = Uint16Array && Uint16Array.prototype.sort;
+
+	// WebKit
+	var ACCEPT_INCORRECT_ARGUMENTS = !!nativeSort$1 && !fails$v(function () {
+	  var array = new Uint16Array(2);
+	  array.sort(null);
+	  array.sort({});
+	});
+
+	var STABLE_SORT$1 = !!nativeSort$1 && !fails$v(function () {
+	  // feature detection can be too slow, so check engines versions
+	  if (V8$1) return V8$1 < 74;
+	  if (FF$1) return FF$1 < 67;
+	  if (IE_OR_EDGE$1) return true;
+	  if (WEBKIT$1) return WEBKIT$1 < 602;
+
+	  var array = new Uint16Array(516);
+	  var expected = Array(516);
+	  var index, mod;
+
+	  for (index = 0; index < 516; index++) {
+	    mod = index % 4;
+	    array[index] = 515 - index;
+	    expected[index] = index - 2 * mod + 3;
 	  }
-	  self._handled = true;
-	  Promise$1._immediateFn(function() {
-	    var cb = self._state === 1 ? deferred.onFulfilled : deferred.onRejected;
-	    if (cb === null) {
-	      (self._state === 1 ? resolve : reject)(deferred.promise, self._value);
-	      return;
-	    }
-	    var ret;
-	    try {
-	      ret = cb(self._value);
-	    } catch (e) {
-	      reject(deferred.promise, e);
-	      return;
-	    }
-	    resolve(deferred.promise, ret);
+
+	  array.sort(function (a, b) {
+	    return (a / 4 | 0) - (b / 4 | 0);
 	  });
-	}
 
-	function resolve(self, newValue) {
-	  try {
-	    // Promise Resolution Procedure: https://github.com/promises-aplus/promises-spec#the-promise-resolution-procedure
-	    if (newValue === self)
-	      { throw new TypeError('A promise cannot be resolved with itself.'); }
-	    if (
-	      newValue &&
-	      (typeof newValue === 'object' || typeof newValue === 'function')
-	    ) {
-	      var then = newValue.then;
-	      if (newValue instanceof Promise$1) {
-	        self._state = 3;
-	        self._value = newValue;
-	        finale(self);
-	        return;
-	      } else if (typeof then === 'function') {
-	        doResolve(bind$2(then, newValue), self);
-	        return;
-	      }
-	    }
-	    self._state = 1;
-	    self._value = newValue;
-	    finale(self);
-	  } catch (e) {
-	    reject(self, e);
+	  for (index = 0; index < 516; index++) {
+	    if (array[index] !== expected[index]) return true;
 	  }
-	}
+	});
 
-	function reject(self, newValue) {
-	  self._state = 2;
-	  self._value = newValue;
-	  finale(self);
-	}
+	var getSortCompare$1 = function (comparefn) {
+	  return function (x, y) {
+	    if (comparefn !== undefined) return +comparefn(x, y) || 0;
+	    // eslint-disable-next-line no-self-compare -- NaN check
+	    if (y !== y) return -1;
+	    // eslint-disable-next-line no-self-compare -- NaN check
+	    if (x !== x) return 1;
+	    if (x === 0 && y === 0) return 1 / x > 0 && 1 / y < 0 ? 1 : -1;
+	    return x > y;
+	  };
+	};
 
-	function finale(self) {
-	  if (self._state === 2 && self._deferreds.length === 0) {
-	    Promise$1._immediateFn(function() {
-	      if (!self._handled) {
-	        Promise$1._unhandledRejectionFn(self._value);
-	      }
-	    });
-	  }
+	// `%TypedArray%.prototype.sort` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.sort
+	exportTypedArrayMethod$3('sort', function sort(comparefn) {
+	  var array = this;
+	  if (comparefn !== undefined) aFunction$3(comparefn);
+	  if (STABLE_SORT$1) return nativeSort$1.call(array, comparefn);
+
+	  aTypedArray$2(array);
+	  var arrayLength = toLength$c(array.length);
+	  var items = Array(arrayLength);
+	  var index;
 
-	  for (var i = 0, len = self._deferreds.length; i < len; i++) {
-	    handle(self, self._deferreds[i]);
+	  for (index = 0; index < arrayLength; index++) {
+	    items[index] = array[index];
 	  }
-	  self._deferreds = null;
-	}
 
-	/**
-	 * @constructor
-	 */
-	function Handler(onFulfilled, onRejected, promise) {
-	  this.onFulfilled = typeof onFulfilled === 'function' ? onFulfilled : null;
-	  this.onRejected = typeof onRejected === 'function' ? onRejected : null;
-	  this.promise = promise;
-	}
+	  items = internalSort$1(array, getSortCompare$1(comparefn));
 
-	/**
-	 * Take a potentially misbehaving resolver function and make sure
-	 * onFulfilled and onRejected are only called once.
-	 *
-	 * Makes no guarantees about asynchrony.
-	 */
-	function doResolve(fn, self) {
-	  var done = false;
-	  try {
-	    fn(
-	      function(value) {
-	        if (done) { return; }
-	        done = true;
-	        resolve(self, value);
-	      },
-	      function(reason) {
-	        if (done) { return; }
-	        done = true;
-	        reject(self, reason);
-	      }
-	    );
-	  } catch (ex) {
-	    if (done) { return; }
-	    done = true;
-	    reject(self, ex);
+	  for (index = 0; index < arrayLength; index++) {
+	    array[index] = items[index];
 	  }
-	}
 
-	Promise$1.prototype['catch'] = function(onRejected) {
-	  return this.then(null, onRejected);
-	};
+	  return array;
+	}, !STABLE_SORT$1 || ACCEPT_INCORRECT_ARGUMENTS);
 
-	Promise$1.prototype.then = function(onFulfilled, onRejected) {
-	  // @ts-ignore
-	  var prom = new this.constructor(noop$1);
+	var ArrayBufferViewCore$1 = arrayBufferViewCore;
+	var toLength$b = toLength$q;
+	var toAbsoluteIndex$3 = toAbsoluteIndex$8;
+	var speciesConstructor$2 = speciesConstructor$8;
 
-	  handle(this, new Handler(onFulfilled, onRejected, prom));
-	  return prom;
-	};
+	var aTypedArray$1 = ArrayBufferViewCore$1.aTypedArray;
+	var exportTypedArrayMethod$2 = ArrayBufferViewCore$1.exportTypedArrayMethod;
 
-	Promise$1.prototype['finally'] = finallyConstructor;
+	// `%TypedArray%.prototype.subarray` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.subarray
+	exportTypedArrayMethod$2('subarray', function subarray(begin, end) {
+	  var O = aTypedArray$1(this);
+	  var length = O.length;
+	  var beginIndex = toAbsoluteIndex$3(begin, length);
+	  return new (speciesConstructor$2(O, O.constructor))(
+	    O.buffer,
+	    O.byteOffset + beginIndex * O.BYTES_PER_ELEMENT,
+	    toLength$b((end === undefined ? length : toAbsoluteIndex$3(end, length)) - beginIndex)
+	  );
+	});
 
-	Promise$1.all = function(arr) {
-	  return new Promise$1(function(resolve, reject) {
-	    if (!isArray$4(arr)) {
-	      return reject(new TypeError('Promise.all accepts an array'));
-	    }
+	var global$c = global$F;
+	var ArrayBufferViewCore = arrayBufferViewCore;
+	var fails$u = fails$N;
 
-	    var args = Array.prototype.slice.call(arr);
-	    if (args.length === 0) { return resolve([]); }
-	    var remaining = args.length;
+	var Int8Array$1 = global$c.Int8Array;
+	var aTypedArray = ArrayBufferViewCore.aTypedArray;
+	var exportTypedArrayMethod$1 = ArrayBufferViewCore.exportTypedArrayMethod;
+	var $toLocaleString = [].toLocaleString;
+	var $slice = [].slice;
 
-	    function res(i, val) {
-	      try {
-	        if (val && (typeof val === 'object' || typeof val === 'function')) {
-	          var then = val.then;
-	          if (typeof then === 'function') {
-	            then.call(
-	              val,
-	              function(val) {
-	                res(i, val);
-	              },
-	              reject
-	            );
-	            return;
-	          }
-	        }
-	        args[i] = val;
-	        if (--remaining === 0) {
-	          resolve(args);
-	        }
-	      } catch (ex) {
-	        reject(ex);
-	      }
-	    }
+	// iOS Safari 6.x fails here
+	var TO_LOCALE_STRING_BUG = !!Int8Array$1 && fails$u(function () {
+	  $toLocaleString.call(new Int8Array$1(1));
+	});
 
-	    for (var i = 0; i < args.length; i++) {
-	      res(i, args[i]);
-	    }
-	  });
-	};
+	var FORCED$b = fails$u(function () {
+	  return [1, 2].toLocaleString() != new Int8Array$1([1, 2]).toLocaleString();
+	}) || !fails$u(function () {
+	  Int8Array$1.prototype.toLocaleString.call([1, 2]);
+	});
 
-	Promise$1.resolve = function(value) {
-	  if (value && typeof value === 'object' && value.constructor === Promise$1) {
-	    return value;
-	  }
+	// `%TypedArray%.prototype.toLocaleString` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.tolocalestring
+	exportTypedArrayMethod$1('toLocaleString', function toLocaleString() {
+	  return $toLocaleString.apply(TO_LOCALE_STRING_BUG ? $slice.call(aTypedArray(this)) : aTypedArray(this), arguments);
+	}, FORCED$b);
 
-	  return new Promise$1(function(resolve) {
-	    resolve(value);
-	  });
-	};
+	var exportTypedArrayMethod = arrayBufferViewCore.exportTypedArrayMethod;
+	var fails$t = fails$N;
+	var global$b = global$F;
 
-	Promise$1.reject = function(value) {
-	  return new Promise$1(function(resolve, reject) {
-	    reject(value);
-	  });
-	};
+	var Uint8Array$1 = global$b.Uint8Array;
+	var Uint8ArrayPrototype = Uint8Array$1 && Uint8Array$1.prototype || {};
+	var arrayToString = [].toString;
+	var arrayJoin = [].join;
 
-	Promise$1.race = function(arr) {
-	  return new Promise$1(function(resolve, reject) {
-	    if (!isArray$4(arr)) {
-	      return reject(new TypeError('Promise.race accepts an array'));
-	    }
+	if (fails$t(function () { arrayToString.call({}); })) {
+	  arrayToString = function toString() {
+	    return arrayJoin.call(this);
+	  };
+	}
 
-	    for (var i = 0, len = arr.length; i < len; i++) {
-	      Promise$1.resolve(arr[i]).then(resolve, reject);
-	    }
-	  });
-	};
+	var IS_NOT_ARRAY_METHOD = Uint8ArrayPrototype.toString != arrayToString;
 
-	// Use polyfill for setImmediate for performance gains
-	Promise$1._immediateFn =
-	  // @ts-ignore
-	  (typeof setImmediate === 'function' &&
-	    function(fn) {
-	      // @ts-ignore
-	      setImmediate(fn);
-	    }) ||
-	  function(fn) {
-	    setTimeoutFunc(fn, 0);
-	  };
+	// `%TypedArray%.prototype.toString` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.tostring
+	exportTypedArrayMethod('toString', arrayToString, IS_NOT_ARRAY_METHOD);
 
-	Promise$1._unhandledRejectionFn = function _unhandledRejectionFn(err) {
-	  if (typeof console !== 'undefined' && console) {
-	    console.warn('Possible Unhandled Promise Rejection:', err); // eslint-disable-line no-console
-	  }
-	};
+	var $$T = _export;
+	var IndexedObject$1 = indexedObject;
+	var toIndexedObject$3 = toIndexedObject$b;
+	var arrayMethodIsStrict$4 = arrayMethodIsStrict$8;
 
-	/** @suppress {undefinedVars} */
-	var globalNS = (function() {
-	  // the only reliable means to get the global object is
-	  // `Function('return this')()`
-	  // However, this causes CSP violations in Chrome apps.
-	  if (typeof self !== 'undefined') {
-	    return self;
-	  }
-	  if (typeof window !== 'undefined') {
-	    return window;
-	  }
-	  if (typeof global !== 'undefined') {
-	    return global;
-	  }
-	  throw new Error('unable to locate global object');
-	})();
+	var nativeJoin = [].join;
 
-	if (!('Promise' in globalNS)) {
-	  globalNS['Promise'] = Promise$1;
-	} else if (!globalNS.Promise.prototype['finally']) {
-	  globalNS.Promise.prototype['finally'] = finallyConstructor;
-	}
+	var ES3_STRINGS = IndexedObject$1 != Object;
+	var STRICT_METHOD$4 = arrayMethodIsStrict$4('join', ',');
 
-	var polyfill$e = /*#__PURE__*/Object.freeze({
-		__proto__: null
+	// `Array.prototype.join` method
+	// https://tc39.es/ecma262/#sec-array.prototype.join
+	$$T({ target: 'Array', proto: true, forced: ES3_STRINGS || !STRICT_METHOD$4 }, {
+	  join: function join(separator) {
+	    return nativeJoin.call(toIndexedObject$3(this), separator === undefined ? ',' : separator);
+	  }
 	});
 
-	var setAsap = createCommonjsModule(function (module) {
-	(function (thisVar, undefined$1) {
-		var main = (typeof window === 'object' && window) || (typeof commonjsGlobal === 'object' && commonjsGlobal) ||
-			typeof self === 'object' && self || thisVar;
-
-		var hasSetImmediate = typeof setImmediate === 'function';
-		var hasNextTick = typeof process === 'object' && !!process && typeof process.nextTick === 'function';
-		var index = 0;
-
-		function getNewIndex() {
-			if (index === 9007199254740991) {
-				return 0;
-			}
-			return ++index;
-		}
-
-		var setAsap = (function () {
-			var hiddenDiv, scriptEl, timeoutFn, callbacks;
-
-			// Modern browsers, fastest async
-			if (main.MutationObserver) {
-				return function setAsap(callback) {
-					hiddenDiv = document.createElement("div");
-					(new MutationObserver(function() {
-						callback();
-						hiddenDiv = null;
-					})).observe(hiddenDiv, { attributes: true });
-					hiddenDiv.setAttribute('i', '1');
-				};
-
-			// Browsers that support postMessage
-			} else if (!hasSetImmediate && main.postMessage && !main.importScripts && main.addEventListener) {
-
-				var MESSAGE_PREFIX = "com.setImmediate" + Math.random();
-				callbacks = {};
-
-				var onGlobalMessage = function (event) {
-					if (event.source === main && event.data.indexOf(MESSAGE_PREFIX) === 0) {
-						var i = +event.data.split(':')[1];
-						callbacks[i]();
-						delete callbacks[i];
-					}
-				};
-
-				main.addEventListener("message", onGlobalMessage, false);
-
-				return function setAsap(callback) {
-					var i = getNewIndex();
-					callbacks[i] = callback;
-					main.postMessage(MESSAGE_PREFIX + ':' + i, "*");
-				};
-
-				// IE browsers without postMessage
-			} else if (!hasSetImmediate && main.document && 'onreadystatechange' in document.createElement('script')) {
-
-				return function setAsap(callback) {
-					scriptEl = document.createElement("script");
-					scriptEl.onreadystatechange = function onreadystatechange() {
-						scriptEl.onreadystatechange = null;
-						scriptEl.parentNode.removeChild(scriptEl);
-						scriptEl = null;
-						callback();
-					};
-					document.body.appendChild(scriptEl);
-				};
-
-			// All other browsers and node
-			} else {
-
-				timeoutFn = (hasSetImmediate && setImmediate) || (hasNextTick && process.nextTick) || setTimeout;
-				return function setAsap(callback) {
-					timeoutFn(callback);
-				};
-			}
-
-		})();
-
-		if ( module.exports) {
-			module.exports = setAsap;
-		} else if (typeof commonjsRequire !== 'undefined' && commonjsRequire.amd) {
-			undefined$1(function () {
-				return setAsap;
-			});
-		} else {
-			main.setAsap = setAsap;
-		}
-	})(commonjsGlobal);
+	var toPrimitive$2 = toPrimitive$7;
+	var definePropertyModule = objectDefineProperty;
+	var createPropertyDescriptor$1 = createPropertyDescriptor$7;
+
+	var createProperty$4 = function (object, key, value) {
+	  var propertyKey = toPrimitive$2(key);
+	  if (propertyKey in object) definePropertyModule.f(object, propertyKey, createPropertyDescriptor$1(0, value));
+	  else object[propertyKey] = value;
+	};
+
+	var $$S = _export;
+	var isObject$d = isObject$r;
+	var isArray$2 = isArray$6;
+	var toAbsoluteIndex$2 = toAbsoluteIndex$8;
+	var toLength$a = toLength$q;
+	var toIndexedObject$2 = toIndexedObject$b;
+	var createProperty$3 = createProperty$4;
+	var wellKnownSymbol$8 = wellKnownSymbol$s;
+	var arrayMethodHasSpeciesSupport$3 = arrayMethodHasSpeciesSupport$5;
+
+	var HAS_SPECIES_SUPPORT$2 = arrayMethodHasSpeciesSupport$3('slice');
+
+	var SPECIES$1 = wellKnownSymbol$8('species');
+	var nativeSlice = [].slice;
+	var max$3 = Math.max;
+
+	// `Array.prototype.slice` method
+	// https://tc39.es/ecma262/#sec-array.prototype.slice
+	// fallback for not array-like ES3 strings and DOM objects
+	$$S({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$2 }, {
+	  slice: function slice(start, end) {
+	    var O = toIndexedObject$2(this);
+	    var length = toLength$a(O.length);
+	    var k = toAbsoluteIndex$2(start, length);
+	    var fin = toAbsoluteIndex$2(end === undefined ? length : end, length);
+	    // inline `ArraySpeciesCreate` for usage native `Array#slice` where it's possible
+	    var Constructor, result, n;
+	    if (isArray$2(O)) {
+	      Constructor = O.constructor;
+	      // cross-realm fallback
+	      if (typeof Constructor == 'function' && (Constructor === Array || isArray$2(Constructor.prototype))) {
+	        Constructor = undefined;
+	      } else if (isObject$d(Constructor)) {
+	        Constructor = Constructor[SPECIES$1];
+	        if (Constructor === null) Constructor = undefined;
+	      }
+	      if (Constructor === Array || Constructor === undefined) {
+	        return nativeSlice.call(O, k, fin);
+	      }
+	    }
+	    result = new (Constructor === undefined ? Array : Constructor)(max$3(fin - k, 0));
+	    for (n = 0; k < fin; k++, n++) if (k in O) createProperty$3(result, n, O[k]);
+	    result.length = n;
+	    return result;
+	  }
 	});
 
-	var performanceNow = createCommonjsModule(function (module) {
-	// Generated by CoffeeScript 1.12.2
-	(function() {
-	  var getNanoSeconds, hrtime, loadTime, moduleLoadTime, nodeLoadTime, upTime;
+	var fails$s = fails$N;
+	var wellKnownSymbol$7 = wellKnownSymbol$s;
+	var IS_PURE = isPure;
 
-	  if ((typeof performance !== "undefined" && performance !== null) && performance.now) {
-	    module.exports = function() {
-	      return performance.now();
-	    };
-	  } else if ((typeof process !== "undefined" && process !== null) && process.hrtime) {
-	    module.exports = function() {
-	      return (getNanoSeconds() - nodeLoadTime) / 1e6;
-	    };
-	    hrtime = process.hrtime;
-	    getNanoSeconds = function() {
-	      var hr;
-	      hr = hrtime();
-	      return hr[0] * 1e9 + hr[1];
-	    };
-	    moduleLoadTime = getNanoSeconds();
-	    upTime = process.uptime() * 1e9;
-	    nodeLoadTime = moduleLoadTime - upTime;
-	  } else if (Date.now) {
-	    module.exports = function() {
-	      return Date.now() - loadTime;
-	    };
-	    loadTime = Date.now();
-	  } else {
-	    module.exports = function() {
-	      return new Date().getTime() - loadTime;
-	    };
-	    loadTime = new Date().getTime();
-	  }
+	var ITERATOR$1 = wellKnownSymbol$7('iterator');
 
-	}).call(commonjsGlobal);
+	var nativeUrl = !fails$s(function () {
+	  var url = new URL('b?a=1&b=2&c=3', 'http://a');
+	  var searchParams = url.searchParams;
+	  var result = '';
+	  url.pathname = 'c%20d';
+	  searchParams.forEach(function (value, key) {
+	    searchParams['delete']('b');
+	    result += key + value;
+	  });
+	  return (IS_PURE && !url.toJSON)
+	    || !searchParams.sort
+	    || url.href !== 'http://a/c%20d?a=1&c=3'
+	    || searchParams.get('c') !== '3'
+	    || String(new URLSearchParams('?a=1')) !== 'a=1'
+	    || !searchParams[ITERATOR$1]
+	    // throws in Edge
+	    || new URL('https://a@b').username !== 'a'
+	    || new URLSearchParams(new URLSearchParams('a=b')).get('a') !== 'b'
+	    // not punycoded in Edge
+	    || new URL('http://тест').host !== 'xn--e1aybc'
+	    // not escaped in Chrome 62-
+	    || new URL('http://a#б').hash !== '#%D0%B1'
+	    // fails in Chrome 66-
+	    || result !== 'a1c3'
+	    // throws in Safari
+	    || new URL('http://x', undefined).host !== 'x';
+	});
 
+	var DESCRIPTORS$b = descriptors;
+	var fails$r = fails$N;
+	var objectKeys$1 = objectKeys$4;
+	var getOwnPropertySymbolsModule = objectGetOwnPropertySymbols;
+	var propertyIsEnumerableModule = objectPropertyIsEnumerable;
+	var toObject$8 = toObject$i;
+	var IndexedObject = indexedObject;
+
+	// eslint-disable-next-line es/no-object-assign -- safe
+	var $assign = Object.assign;
+	// eslint-disable-next-line es/no-object-defineproperty -- required for testing
+	var defineProperty$5 = Object.defineProperty;
+
+	// `Object.assign` method
+	// https://tc39.es/ecma262/#sec-object.assign
+	var objectAssign = !$assign || fails$r(function () {
+	  // should have correct order of operations (Edge bug)
+	  if (DESCRIPTORS$b && $assign({ b: 1 }, $assign(defineProperty$5({}, 'a', {
+	    enumerable: true,
+	    get: function () {
+	      defineProperty$5(this, 'b', {
+	        value: 3,
+	        enumerable: false
+	      });
+	    }
+	  }), { b: 2 })).b !== 1) return true;
+	  // should work with symbols and should have deterministic property order (V8 bug)
+	  var A = {};
+	  var B = {};
+	  // eslint-disable-next-line es/no-symbol -- safe
+	  var symbol = Symbol();
+	  var alphabet = 'abcdefghijklmnopqrst';
+	  A[symbol] = 7;
+	  alphabet.split('').forEach(function (chr) { B[chr] = chr; });
+	  return $assign({}, A)[symbol] != 7 || objectKeys$1($assign({}, B)).join('') != alphabet;
+	}) ? function assign(target, source) { // eslint-disable-line no-unused-vars -- required for `.length`
+	  var T = toObject$8(target);
+	  var argumentsLength = arguments.length;
+	  var index = 1;
+	  var getOwnPropertySymbols = getOwnPropertySymbolsModule.f;
+	  var propertyIsEnumerable = propertyIsEnumerableModule.f;
+	  while (argumentsLength > index) {
+	    var S = IndexedObject(arguments[index++]);
+	    var keys = getOwnPropertySymbols ? objectKeys$1(S).concat(getOwnPropertySymbols(S)) : objectKeys$1(S);
+	    var length = keys.length;
+	    var j = 0;
+	    var key;
+	    while (length > j) {
+	      key = keys[j++];
+	      if (!DESCRIPTORS$b || propertyIsEnumerable.call(S, key)) T[key] = S[key];
+	    }
+	  } return T;
+	} : $assign;
 
-	});
+	var anObject$a = anObject$m;
+	var iteratorClose = iteratorClose$2;
 
-	var root = typeof window === 'undefined' ? commonjsGlobal : window
-	  , vendors = ['moz', 'webkit']
-	  , suffix = 'AnimationFrame'
-	  , raf = root['request' + suffix]
-	  , caf = root['cancel' + suffix] || root['cancelRequest' + suffix];
-
-	for(var i = 0; !raf && i < vendors.length; i++) {
-	  raf = root[vendors[i] + 'Request' + suffix];
-	  caf = root[vendors[i] + 'Cancel' + suffix]
-	      || root[vendors[i] + 'CancelRequest' + suffix];
-	}
-
-	// Some versions of FF have rAF but not cAF
-	if(!raf || !caf) {
-	  var last = 0
-	    , id$2 = 0
-	    , queue = []
-	    , frameDuration = 1000 / 60;
-
-	  raf = function(callback) {
-	    if(queue.length === 0) {
-	      var _now = performanceNow()
-	        , next = Math.max(0, frameDuration - (_now - last));
-	      last = next + _now;
-	      setTimeout(function() {
-	        var cp = queue.slice(0);
-	        // Clear queue here to prevent
-	        // callbacks from appending listeners
-	        // to the current frame's queue
-	        queue.length = 0;
-	        for(var i = 0; i < cp.length; i++) {
-	          if(!cp[i].cancelled) {
-	            try{
-	              cp[i].callback(last);
-	            } catch(e) {
-	              setTimeout(function() { throw e }, 0);
-	            }
-	          }
-	        }
-	      }, Math.round(next));
+	// call something on iterator step with safe closing on error
+	var callWithSafeIterationClosing$1 = function (iterator, fn, value, ENTRIES) {
+	  try {
+	    return ENTRIES ? fn(anObject$a(value)[0], value[1]) : fn(value);
+	  } catch (error) {
+	    iteratorClose(iterator);
+	    throw error;
+	  }
+	};
+
+	var bind$6 = functionBindContext;
+	var toObject$7 = toObject$i;
+	var callWithSafeIterationClosing = callWithSafeIterationClosing$1;
+	var isArrayIteratorMethod = isArrayIteratorMethod$3;
+	var toLength$9 = toLength$q;
+	var createProperty$2 = createProperty$4;
+	var getIteratorMethod$2 = getIteratorMethod$5;
+
+	// `Array.from` method implementation
+	// https://tc39.es/ecma262/#sec-array.from
+	var arrayFrom$1 = function from(arrayLike /* , mapfn = undefined, thisArg = undefined */) {
+	  var O = toObject$7(arrayLike);
+	  var C = typeof this == 'function' ? this : Array;
+	  var argumentsLength = arguments.length;
+	  var mapfn = argumentsLength > 1 ? arguments[1] : undefined;
+	  var mapping = mapfn !== undefined;
+	  var iteratorMethod = getIteratorMethod$2(O);
+	  var index = 0;
+	  var length, result, step, iterator, next, value;
+	  if (mapping) mapfn = bind$6(mapfn, argumentsLength > 2 ? arguments[2] : undefined, 2);
+	  // if the target is not iterable or it's an array with the default iterator - use a simple case
+	  if (iteratorMethod != undefined && !(C == Array && isArrayIteratorMethod(iteratorMethod))) {
+	    iterator = iteratorMethod.call(O);
+	    next = iterator.next;
+	    result = new C();
+	    for (;!(step = next.call(iterator)).done; index++) {
+	      value = mapping ? callWithSafeIterationClosing(iterator, mapfn, [step.value, index], true) : step.value;
+	      createProperty$2(result, index, value);
 	    }
-	    queue.push({
-	      handle: ++id$2,
-	      callback: callback,
-	      cancelled: false
-	    });
-	    return id$2
-	  };
+	  } else {
+	    length = toLength$9(O.length);
+	    result = new C(length);
+	    for (;length > index; index++) {
+	      value = mapping ? mapfn(O[index], index) : O[index];
+	      createProperty$2(result, index, value);
+	    }
+	  }
+	  result.length = index;
+	  return result;
+	};
 
-	  caf = function(handle) {
-	    for(var i = 0; i < queue.length; i++) {
-	      if(queue[i].handle === handle) {
-	        queue[i].cancelled = true;
+	// based on https://github.com/bestiejs/punycode.js/blob/master/punycode.js
+	var maxInt = 2147483647; // aka. 0x7FFFFFFF or 2^31-1
+	var base = 36;
+	var tMin = 1;
+	var tMax = 26;
+	var skew = 38;
+	var damp = 700;
+	var initialBias = 72;
+	var initialN = 128; // 0x80
+	var delimiter = '-'; // '\x2D'
+	var regexNonASCII = /[^\0-\u007E]/; // non-ASCII chars
+	var regexSeparators = /[.\u3002\uFF0E\uFF61]/g; // RFC 3490 separators
+	var OVERFLOW_ERROR = 'Overflow: input needs wider integers to process';
+	var baseMinusTMin = base - tMin;
+	var floor$3 = Math.floor;
+	var stringFromCharCode = String.fromCharCode;
+
+	/**
+	 * Creates an array containing the numeric code points of each Unicode
+	 * character in the string. While JavaScript uses UCS-2 internally,
+	 * this function will convert a pair of surrogate halves (each of which
+	 * UCS-2 exposes as separate characters) into a single code point,
+	 * matching UTF-16.
+	 */
+	var ucs2decode = function (string) {
+	  var output = [];
+	  var counter = 0;
+	  var length = string.length;
+	  while (counter < length) {
+	    var value = string.charCodeAt(counter++);
+	    if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
+	      // It's a high surrogate, and there is a next character.
+	      var extra = string.charCodeAt(counter++);
+	      if ((extra & 0xFC00) == 0xDC00) { // Low surrogate.
+	        output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
+	      } else {
+	        // It's an unmatched surrogate; only append this code unit, in case the
+	        // next code unit is the high surrogate of a surrogate pair.
+	        output.push(value);
+	        counter--;
 	      }
+	    } else {
+	      output.push(value);
 	    }
-	  };
-	}
-
-	var raf_1 = function(fn) {
-	  // Wrap in a new function to prevent
-	  // `cancel` potentially being assigned
-	  // to the native rAF function
-	  return raf.call(root, fn)
+	  }
+	  return output;
 	};
-	var cancel = function() {
-	  caf.apply(root, arguments);
+
+	/**
+	 * Converts a digit/integer into a basic code point.
+	 */
+	var digitToBasic = function (digit) {
+	  //  0..25 map to ASCII a..z or A..Z
+	  // 26..35 map to ASCII 0..9
+	  return digit + 22 + 75 * (digit < 26);
 	};
-	var polyfill$f = function(object) {
-	  if (!object) {
-	    object = root;
+
+	/**
+	 * Bias adaptation function as per section 3.4 of RFC 3492.
+	 * https://tools.ietf.org/html/rfc3492#section-3.4
+	 */
+	var adapt = function (delta, numPoints, firstTime) {
+	  var k = 0;
+	  delta = firstTime ? floor$3(delta / damp) : delta >> 1;
+	  delta += floor$3(delta / numPoints);
+	  for (; delta > baseMinusTMin * tMax >> 1; k += base) {
+	    delta = floor$3(delta / baseMinusTMin);
 	  }
-	  object.requestAnimationFrame = raf;
-	  object.cancelAnimationFrame = caf;
+	  return floor$3(k + (baseMinusTMin + 1) * delta / (delta + skew));
 	};
-	raf_1.cancel = cancel;
-	raf_1.polyfill = polyfill$f;
 
-	var global$1 = (function(self) {
-	  return self
-	  // eslint-disable-next-line no-invalid-this
-	})(typeof self !== 'undefined' ? self : undefined);
-	var support = {
-	  searchParams: 'URLSearchParams' in global$1,
-	  iterable: 'Symbol' in global$1 && 'iterator' in Symbol,
-	  blob:
-	    'FileReader' in global$1 &&
-	    'Blob' in global$1 &&
-	    (function() {
-	      try {
-	        new Blob();
-	        return true
-	      } catch (e) {
-	        return false
-	      }
-	    })(),
-	  formData: 'FormData' in global$1,
-	  arrayBuffer: 'ArrayBuffer' in global$1
-	};
+	/**
+	 * Converts a string of Unicode symbols (e.g. a domain name label) to a
+	 * Punycode string of ASCII-only symbols.
+	 */
+	// eslint-disable-next-line max-statements -- TODO
+	var encode = function (input) {
+	  var output = [];
 
-	function isDataView(obj) {
-	  return obj && DataView.prototype.isPrototypeOf(obj)
-	}
+	  // Convert the input in UCS-2 to an array of Unicode code points.
+	  input = ucs2decode(input);
 
-	if (support.arrayBuffer) {
-	  var viewClasses = [
-	    '[object Int8Array]',
-	    '[object Uint8Array]',
-	    '[object Uint8ClampedArray]',
-	    '[object Int16Array]',
-	    '[object Uint16Array]',
-	    '[object Int32Array]',
-	    '[object Uint32Array]',
-	    '[object Float32Array]',
-	    '[object Float64Array]'
-	  ];
+	  // Cache the length.
+	  var inputLength = input.length;
 
-	  var isArrayBufferView =
-	    ArrayBuffer.isView ||
-	    function(obj) {
-	      return obj && viewClasses.indexOf(Object.prototype.toString.call(obj)) > -1
-	    };
-	}
+	  // Initialize the state.
+	  var n = initialN;
+	  var delta = 0;
+	  var bias = initialBias;
+	  var i, currentValue;
 
-	function normalizeName(name) {
-	  if (typeof name !== 'string') {
-	    name = String(name);
-	  }
-	  if (/[^a-z0-9\-#$%&'*+.^_`|~!]/i.test(name) || name === '') {
-	    throw new TypeError('Invalid character in header field name')
+	  // Handle the basic code points.
+	  for (i = 0; i < input.length; i++) {
+	    currentValue = input[i];
+	    if (currentValue < 0x80) {
+	      output.push(stringFromCharCode(currentValue));
+	    }
 	  }
-	  return name.toLowerCase()
-	}
 
-	function normalizeValue(value) {
-	  if (typeof value !== 'string') {
-	    value = String(value);
+	  var basicLength = output.length; // number of basic code points.
+	  var handledCPCount = basicLength; // number of code points that have been handled;
+
+	  // Finish the basic string with a delimiter unless it's empty.
+	  if (basicLength) {
+	    output.push(delimiter);
 	  }
-	  return value
-	}
 
-	// Build a destructive iterator for the value list
-	function iteratorFor(items) {
-	  var iterator = {
-	    next: function() {
-	      var value = items.shift();
-	      return {done: value === undefined, value: value}
+	  // Main encoding loop:
+	  while (handledCPCount < inputLength) {
+	    // All non-basic code points < n have been handled already. Find the next larger one:
+	    var m = maxInt;
+	    for (i = 0; i < input.length; i++) {
+	      currentValue = input[i];
+	      if (currentValue >= n && currentValue < m) {
+	        m = currentValue;
+	      }
 	    }
-	  };
 
-	  if (support.iterable) {
-	    iterator[Symbol.iterator] = function() {
-	      return iterator
-	    };
-	  }
+	    // Increase `delta` enough to advance the decoder's <n,i> state to <m,0>, but guard against overflow.
+	    var handledCPCountPlusOne = handledCPCount + 1;
+	    if (m - n > floor$3((maxInt - delta) / handledCPCountPlusOne)) {
+	      throw RangeError(OVERFLOW_ERROR);
+	    }
 
-	  return iterator
-	}
+	    delta += (m - n) * handledCPCountPlusOne;
+	    n = m;
 
-	function Headers(headers) {
-	  this.map = {};
+	    for (i = 0; i < input.length; i++) {
+	      currentValue = input[i];
+	      if (currentValue < n && ++delta > maxInt) {
+	        throw RangeError(OVERFLOW_ERROR);
+	      }
+	      if (currentValue == n) {
+	        // Represent delta as a generalized variable-length integer.
+	        var q = delta;
+	        for (var k = base; /* no condition */; k += base) {
+	          var t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
+	          if (q < t) break;
+	          var qMinusT = q - t;
+	          var baseMinusT = base - t;
+	          output.push(stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT)));
+	          q = floor$3(qMinusT / baseMinusT);
+	        }
+
+	        output.push(stringFromCharCode(digitToBasic(q)));
+	        bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);
+	        delta = 0;
+	        ++handledCPCount;
+	      }
+	    }
 
-	  if (headers instanceof Headers) {
-	    headers.forEach(function(value, name) {
-	      this.append(name, value);
-	    }, this);
-	  } else if (Array.isArray(headers)) {
-	    headers.forEach(function(header) {
-	      this.append(header[0], header[1]);
-	    }, this);
-	  } else if (headers) {
-	    Object.getOwnPropertyNames(headers).forEach(function(name) {
-	      this.append(name, headers[name]);
-	    }, this);
+	    ++delta;
+	    ++n;
+	  }
+	  return output.join('');
+	};
+
+	var stringPunycodeToAscii = function (input) {
+	  var encoded = [];
+	  var labels = input.toLowerCase().replace(regexSeparators, '\u002E').split('.');
+	  var i, label;
+	  for (i = 0; i < labels.length; i++) {
+	    label = labels[i];
+	    encoded.push(regexNonASCII.test(label) ? 'xn--' + encode(label) : label);
+	  }
+	  return encoded.join('.');
+	};
+
+	var anObject$9 = anObject$m;
+	var getIteratorMethod$1 = getIteratorMethod$5;
+
+	var getIterator$1 = function (it) {
+	  var iteratorMethod = getIteratorMethod$1(it);
+	  if (typeof iteratorMethod != 'function') {
+	    throw TypeError(String(it) + ' is not iterable');
+	  } return anObject$9(iteratorMethod.call(it));
+	};
+
+	// TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`
+
+	var $$R = _export;
+	var getBuiltIn$2 = getBuiltIn$9;
+	var USE_NATIVE_URL$1 = nativeUrl;
+	var redefine$7 = redefine$g.exports;
+	var redefineAll$1 = redefineAll$4;
+	var setToStringTag$4 = setToStringTag$a;
+	var createIteratorConstructor = createIteratorConstructor$2;
+	var InternalStateModule$2 = internalState;
+	var anInstance$3 = anInstance$7;
+	var hasOwn = has$j;
+	var bind$5 = functionBindContext;
+	var classof$4 = classof$b;
+	var anObject$8 = anObject$m;
+	var isObject$c = isObject$r;
+	var create$8 = objectCreate;
+	var createPropertyDescriptor = createPropertyDescriptor$7;
+	var getIterator = getIterator$1;
+	var getIteratorMethod = getIteratorMethod$5;
+	var wellKnownSymbol$6 = wellKnownSymbol$s;
+
+	var $fetch = getBuiltIn$2('fetch');
+	var Headers$1 = getBuiltIn$2('Headers');
+	var ITERATOR = wellKnownSymbol$6('iterator');
+	var URL_SEARCH_PARAMS = 'URLSearchParams';
+	var URL_SEARCH_PARAMS_ITERATOR = URL_SEARCH_PARAMS + 'Iterator';
+	var setInternalState$2 = InternalStateModule$2.set;
+	var getInternalParamsState = InternalStateModule$2.getterFor(URL_SEARCH_PARAMS);
+	var getInternalIteratorState = InternalStateModule$2.getterFor(URL_SEARCH_PARAMS_ITERATOR);
+
+	var plus = /\+/g;
+	var sequences = Array(4);
+
+	var percentSequence = function (bytes) {
+	  return sequences[bytes - 1] || (sequences[bytes - 1] = RegExp('((?:%[\\da-f]{2}){' + bytes + '})', 'gi'));
+	};
+
+	var percentDecode = function (sequence) {
+	  try {
+	    return decodeURIComponent(sequence);
+	  } catch (error) {
+	    return sequence;
 	  }
-	}
-
-	Headers.prototype.append = function(name, value) {
-	  name = normalizeName(name);
-	  value = normalizeValue(value);
-	  var oldValue = this.map[name];
-	  this.map[name] = oldValue ? oldValue + ', ' + value : value;
 	};
 
-	Headers.prototype['delete'] = function(name) {
-	  delete this.map[normalizeName(name)];
+	var deserialize = function (it) {
+	  var result = it.replace(plus, ' ');
+	  var bytes = 4;
+	  try {
+	    return decodeURIComponent(result);
+	  } catch (error) {
+	    while (bytes) {
+	      result = result.replace(percentSequence(bytes--), percentDecode);
+	    }
+	    return result;
+	  }
 	};
 
-	Headers.prototype.get = function(name) {
-	  name = normalizeName(name);
-	  return this.has(name) ? this.map[name] : null
+	var find$1 = /[!'()~]|%20/g;
+
+	var replace$1 = {
+	  '!': '%21',
+	  "'": '%27',
+	  '(': '%28',
+	  ')': '%29',
+	  '~': '%7E',
+	  '%20': '+'
 	};
 
-	Headers.prototype.has = function(name) {
-	  return this.map.hasOwnProperty(normalizeName(name))
+	var replacer = function (match) {
+	  return replace$1[match];
 	};
 
-	Headers.prototype.set = function(name, value) {
-	  this.map[normalizeName(name)] = normalizeValue(value);
+	var serialize = function (it) {
+	  return encodeURIComponent(it).replace(find$1, replacer);
 	};
 
-	Headers.prototype.forEach = function(callback, thisArg) {
-	  for (var name in this.map) {
-	    if (this.map.hasOwnProperty(name)) {
-	      callback.call(thisArg, this.map[name], name, this);
+	var parseSearchParams = function (result, query) {
+	  if (query) {
+	    var attributes = query.split('&');
+	    var index = 0;
+	    var attribute, entry;
+	    while (index < attributes.length) {
+	      attribute = attributes[index++];
+	      if (attribute.length) {
+	        entry = attribute.split('=');
+	        result.push({
+	          key: deserialize(entry.shift()),
+	          value: deserialize(entry.join('='))
+	        });
+	      }
 	    }
 	  }
 	};
 
-	Headers.prototype.keys = function() {
-	  var items = [];
-	  this.forEach(function(value, name) {
-	    items.push(name);
-	  });
-	  return iteratorFor(items)
+	var updateSearchParams = function (query) {
+	  this.entries.length = 0;
+	  parseSearchParams(this.entries, query);
 	};
 
-	Headers.prototype.values = function() {
-	  var items = [];
-	  this.forEach(function(value) {
-	    items.push(value);
-	  });
-	  return iteratorFor(items)
+	var validateArgumentsLength = function (passed, required) {
+	  if (passed < required) throw TypeError('Not enough arguments');
 	};
 
-	Headers.prototype.entries = function() {
-	  var items = [];
-	  this.forEach(function(value, name) {
-	    items.push([name, value]);
+	var URLSearchParamsIterator = createIteratorConstructor(function Iterator(params, kind) {
+	  setInternalState$2(this, {
+	    type: URL_SEARCH_PARAMS_ITERATOR,
+	    iterator: getIterator(getInternalParamsState(params).entries),
+	    kind: kind
 	  });
-	  return iteratorFor(items)
+	}, 'Iterator', function next() {
+	  var state = getInternalIteratorState(this);
+	  var kind = state.kind;
+	  var step = state.iterator.next();
+	  var entry = step.value;
+	  if (!step.done) {
+	    step.value = kind === 'keys' ? entry.key : kind === 'values' ? entry.value : [entry.key, entry.value];
+	  } return step;
+	});
+
+	// `URLSearchParams` constructor
+	// https://url.spec.whatwg.org/#interface-urlsearchparams
+	var URLSearchParamsConstructor = function URLSearchParams(/* init */) {
+	  anInstance$3(this, URLSearchParamsConstructor, URL_SEARCH_PARAMS);
+	  var init = arguments.length > 0 ? arguments[0] : undefined;
+	  var that = this;
+	  var entries = [];
+	  var iteratorMethod, iterator, next, step, entryIterator, entryNext, first, second, key;
+
+	  setInternalState$2(that, {
+	    type: URL_SEARCH_PARAMS,
+	    entries: entries,
+	    updateURL: function () { /* empty */ },
+	    updateSearchParams: updateSearchParams
+	  });
+
+	  if (init !== undefined) {
+	    if (isObject$c(init)) {
+	      iteratorMethod = getIteratorMethod(init);
+	      if (typeof iteratorMethod === 'function') {
+	        iterator = iteratorMethod.call(init);
+	        next = iterator.next;
+	        while (!(step = next.call(iterator)).done) {
+	          entryIterator = getIterator(anObject$8(step.value));
+	          entryNext = entryIterator.next;
+	          if (
+	            (first = entryNext.call(entryIterator)).done ||
+	            (second = entryNext.call(entryIterator)).done ||
+	            !entryNext.call(entryIterator).done
+	          ) throw TypeError('Expected sequence with length 2');
+	          entries.push({ key: first.value + '', value: second.value + '' });
+	        }
+	      } else for (key in init) if (hasOwn(init, key)) entries.push({ key: key, value: init[key] + '' });
+	    } else {
+	      parseSearchParams(entries, typeof init === 'string' ? init.charAt(0) === '?' ? init.slice(1) : init : init + '');
+	    }
+	  }
 	};
 
-	if (support.iterable) {
-	  Headers.prototype[Symbol.iterator] = Headers.prototype.entries;
-	}
+	var URLSearchParamsPrototype = URLSearchParamsConstructor.prototype;
 
-	function consumed(body) {
-	  if (body.bodyUsed) {
-	    return Promise.reject(new TypeError('Already read'))
+	redefineAll$1(URLSearchParamsPrototype, {
+	  // `URLSearchParams.prototype.append` method
+	  // https://url.spec.whatwg.org/#dom-urlsearchparams-append
+	  append: function append(name, value) {
+	    validateArgumentsLength(arguments.length, 2);
+	    var state = getInternalParamsState(this);
+	    state.entries.push({ key: name + '', value: value + '' });
+	    state.updateURL();
+	  },
+	  // `URLSearchParams.prototype.delete` method
+	  // https://url.spec.whatwg.org/#dom-urlsearchparams-delete
+	  'delete': function (name) {
+	    validateArgumentsLength(arguments.length, 1);
+	    var state = getInternalParamsState(this);
+	    var entries = state.entries;
+	    var key = name + '';
+	    var index = 0;
+	    while (index < entries.length) {
+	      if (entries[index].key === key) entries.splice(index, 1);
+	      else index++;
+	    }
+	    state.updateURL();
+	  },
+	  // `URLSearchParams.prototype.get` method
+	  // https://url.spec.whatwg.org/#dom-urlsearchparams-get
+	  get: function get(name) {
+	    validateArgumentsLength(arguments.length, 1);
+	    var entries = getInternalParamsState(this).entries;
+	    var key = name + '';
+	    var index = 0;
+	    for (; index < entries.length; index++) {
+	      if (entries[index].key === key) return entries[index].value;
+	    }
+	    return null;
+	  },
+	  // `URLSearchParams.prototype.getAll` method
+	  // https://url.spec.whatwg.org/#dom-urlsearchparams-getall
+	  getAll: function getAll(name) {
+	    validateArgumentsLength(arguments.length, 1);
+	    var entries = getInternalParamsState(this).entries;
+	    var key = name + '';
+	    var result = [];
+	    var index = 0;
+	    for (; index < entries.length; index++) {
+	      if (entries[index].key === key) result.push(entries[index].value);
+	    }
+	    return result;
+	  },
+	  // `URLSearchParams.prototype.has` method
+	  // https://url.spec.whatwg.org/#dom-urlsearchparams-has
+	  has: function has(name) {
+	    validateArgumentsLength(arguments.length, 1);
+	    var entries = getInternalParamsState(this).entries;
+	    var key = name + '';
+	    var index = 0;
+	    while (index < entries.length) {
+	      if (entries[index++].key === key) return true;
+	    }
+	    return false;
+	  },
+	  // `URLSearchParams.prototype.set` method
+	  // https://url.spec.whatwg.org/#dom-urlsearchparams-set
+	  set: function set(name, value) {
+	    validateArgumentsLength(arguments.length, 1);
+	    var state = getInternalParamsState(this);
+	    var entries = state.entries;
+	    var found = false;
+	    var key = name + '';
+	    var val = value + '';
+	    var index = 0;
+	    var entry;
+	    for (; index < entries.length; index++) {
+	      entry = entries[index];
+	      if (entry.key === key) {
+	        if (found) entries.splice(index--, 1);
+	        else {
+	          found = true;
+	          entry.value = val;
+	        }
+	      }
+	    }
+	    if (!found) entries.push({ key: key, value: val });
+	    state.updateURL();
+	  },
+	  // `URLSearchParams.prototype.sort` method
+	  // https://url.spec.whatwg.org/#dom-urlsearchparams-sort
+	  sort: function sort() {
+	    var state = getInternalParamsState(this);
+	    var entries = state.entries;
+	    // Array#sort is not stable in some engines
+	    var slice = entries.slice();
+	    var entry, entriesIndex, sliceIndex;
+	    entries.length = 0;
+	    for (sliceIndex = 0; sliceIndex < slice.length; sliceIndex++) {
+	      entry = slice[sliceIndex];
+	      for (entriesIndex = 0; entriesIndex < sliceIndex; entriesIndex++) {
+	        if (entries[entriesIndex].key > entry.key) {
+	          entries.splice(entriesIndex, 0, entry);
+	          break;
+	        }
+	      }
+	      if (entriesIndex === sliceIndex) entries.push(entry);
+	    }
+	    state.updateURL();
+	  },
+	  // `URLSearchParams.prototype.forEach` method
+	  forEach: function forEach(callback /* , thisArg */) {
+	    var entries = getInternalParamsState(this).entries;
+	    var boundFunction = bind$5(callback, arguments.length > 1 ? arguments[1] : undefined, 3);
+	    var index = 0;
+	    var entry;
+	    while (index < entries.length) {
+	      entry = entries[index++];
+	      boundFunction(entry.value, entry.key, this);
+	    }
+	  },
+	  // `URLSearchParams.prototype.keys` method
+	  keys: function keys() {
+	    return new URLSearchParamsIterator(this, 'keys');
+	  },
+	  // `URLSearchParams.prototype.values` method
+	  values: function values() {
+	    return new URLSearchParamsIterator(this, 'values');
+	  },
+	  // `URLSearchParams.prototype.entries` method
+	  entries: function entries() {
+	    return new URLSearchParamsIterator(this, 'entries');
 	  }
-	  body.bodyUsed = true;
-	}
+	}, { enumerable: true });
 
-	function fileReaderReady(reader) {
-	  return new Promise(function(resolve, reject) {
-	    reader.onload = function() {
-	      resolve(reader.result);
-	    };
-	    reader.onerror = function() {
-	      reject(reader.error);
-	    };
-	  })
-	}
+	// `URLSearchParams.prototype[@@iterator]` method
+	redefine$7(URLSearchParamsPrototype, ITERATOR, URLSearchParamsPrototype.entries);
 
-	function readBlobAsArrayBuffer(blob) {
-	  var reader = new FileReader();
-	  var promise = fileReaderReady(reader);
-	  reader.readAsArrayBuffer(blob);
-	  return promise
-	}
+	// `URLSearchParams.prototype.toString` method
+	// https://url.spec.whatwg.org/#urlsearchparams-stringification-behavior
+	redefine$7(URLSearchParamsPrototype, 'toString', function toString() {
+	  var entries = getInternalParamsState(this).entries;
+	  var result = [];
+	  var index = 0;
+	  var entry;
+	  while (index < entries.length) {
+	    entry = entries[index++];
+	    result.push(serialize(entry.key) + '=' + serialize(entry.value));
+	  } return result.join('&');
+	}, { enumerable: true });
 
-	function readBlobAsText(blob) {
-	  var reader = new FileReader();
-	  var promise = fileReaderReady(reader);
-	  reader.readAsText(blob);
-	  return promise
-	}
+	setToStringTag$4(URLSearchParamsConstructor, URL_SEARCH_PARAMS);
 
-	function readArrayBufferAsText(buf) {
-	  var view = new Uint8Array(buf);
-	  var chars = new Array(view.length);
+	$$R({ global: true, forced: !USE_NATIVE_URL$1 }, {
+	  URLSearchParams: URLSearchParamsConstructor
+	});
 
-	  for (var i = 0; i < view.length; i++) {
-	    chars[i] = String.fromCharCode(view[i]);
-	  }
-	  return chars.join('')
+	// Wrap `fetch` for correct work with polyfilled `URLSearchParams`
+	// https://github.com/zloirock/core-js/issues/674
+	if (!USE_NATIVE_URL$1 && typeof $fetch == 'function' && typeof Headers$1 == 'function') {
+	  $$R({ global: true, enumerable: true, forced: true }, {
+	    fetch: function fetch(input /* , init */) {
+	      var args = [input];
+	      var init, body, headers;
+	      if (arguments.length > 1) {
+	        init = arguments[1];
+	        if (isObject$c(init)) {
+	          body = init.body;
+	          if (classof$4(body) === URL_SEARCH_PARAMS) {
+	            headers = init.headers ? new Headers$1(init.headers) : new Headers$1();
+	            if (!headers.has('content-type')) {
+	              headers.set('content-type', 'application/x-www-form-urlencoded;charset=UTF-8');
+	            }
+	            init = create$8(init, {
+	              body: createPropertyDescriptor(0, String(body)),
+	              headers: createPropertyDescriptor(0, headers)
+	            });
+	          }
+	        }
+	        args.push(init);
+	      } return $fetch.apply(this, args);
+	    }
+	  });
 	}
 
-	function bufferClone(buf) {
-	  if (buf.slice) {
-	    return buf.slice(0)
+	var web_urlSearchParams = {
+	  URLSearchParams: URLSearchParamsConstructor,
+	  getState: getInternalParamsState
+	};
+
+	// TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`
+
+	var $$Q = _export;
+	var DESCRIPTORS$a = descriptors;
+	var USE_NATIVE_URL = nativeUrl;
+	var global$a = global$F;
+	var defineProperties$1 = objectDefineProperties;
+	var redefine$6 = redefine$g.exports;
+	var anInstance$2 = anInstance$7;
+	var has$4 = has$j;
+	var assign$2 = objectAssign;
+	var arrayFrom = arrayFrom$1;
+	var codeAt = stringMultibyte.codeAt;
+	var toASCII = stringPunycodeToAscii;
+	var setToStringTag$3 = setToStringTag$a;
+	var URLSearchParamsModule = web_urlSearchParams;
+	var InternalStateModule$1 = internalState;
+
+	var NativeURL = global$a.URL;
+	var URLSearchParams$1 = URLSearchParamsModule.URLSearchParams;
+	var getInternalSearchParamsState = URLSearchParamsModule.getState;
+	var setInternalState$1 = InternalStateModule$1.set;
+	var getInternalURLState = InternalStateModule$1.getterFor('URL');
+	var floor$2 = Math.floor;
+	var pow$1 = Math.pow;
+
+	var INVALID_AUTHORITY = 'Invalid authority';
+	var INVALID_SCHEME = 'Invalid scheme';
+	var INVALID_HOST = 'Invalid host';
+	var INVALID_PORT = 'Invalid port';
+
+	var ALPHA = /[A-Za-z]/;
+	// eslint-disable-next-line regexp/no-obscure-range -- safe
+	var ALPHANUMERIC = /[\d+-.A-Za-z]/;
+	var DIGIT = /\d/;
+	var HEX_START = /^0x/i;
+	var OCT = /^[0-7]+$/;
+	var DEC = /^\d+$/;
+	var HEX = /^[\dA-Fa-f]+$/;
+	/* eslint-disable no-control-regex -- safe */
+	var FORBIDDEN_HOST_CODE_POINT = /[\0\t\n\r #%/:<>?@[\\\]^|]/;
+	var FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT = /[\0\t\n\r #/:<>?@[\\\]^|]/;
+	var LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE = /^[\u0000-\u001F ]+|[\u0000-\u001F ]+$/g;
+	var TAB_AND_NEW_LINE = /[\t\n\r]/g;
+	/* eslint-enable no-control-regex -- safe */
+	var EOF;
+
+	var parseHost = function (url, input) {
+	  var result, codePoints, index;
+	  if (input.charAt(0) == '[') {
+	    if (input.charAt(input.length - 1) != ']') return INVALID_HOST;
+	    result = parseIPv6(input.slice(1, -1));
+	    if (!result) return INVALID_HOST;
+	    url.host = result;
+	  // opaque host
+	  } else if (!isSpecial(url)) {
+	    if (FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT.test(input)) return INVALID_HOST;
+	    result = '';
+	    codePoints = arrayFrom(input);
+	    for (index = 0; index < codePoints.length; index++) {
+	      result += percentEncode(codePoints[index], C0ControlPercentEncodeSet);
+	    }
+	    url.host = result;
 	  } else {
-	    var view = new Uint8Array(buf.byteLength);
-	    view.set(new Uint8Array(buf));
-	    return view.buffer
-	  }
-	}
+	    input = toASCII(input);
+	    if (FORBIDDEN_HOST_CODE_POINT.test(input)) return INVALID_HOST;
+	    result = parseIPv4(input);
+	    if (result === null) return INVALID_HOST;
+	    url.host = result;
+	  }
+	};
+
+	var parseIPv4 = function (input) {
+	  var parts = input.split('.');
+	  var partsLength, numbers, index, part, radix, number, ipv4;
+	  if (parts.length && parts[parts.length - 1] == '') {
+	    parts.pop();
+	  }
+	  partsLength = parts.length;
+	  if (partsLength > 4) return input;
+	  numbers = [];
+	  for (index = 0; index < partsLength; index++) {
+	    part = parts[index];
+	    if (part == '') return input;
+	    radix = 10;
+	    if (part.length > 1 && part.charAt(0) == '0') {
+	      radix = HEX_START.test(part) ? 16 : 8;
+	      part = part.slice(radix == 8 ? 1 : 2);
+	    }
+	    if (part === '') {
+	      number = 0;
+	    } else {
+	      if (!(radix == 10 ? DEC : radix == 8 ? OCT : HEX).test(part)) return input;
+	      number = parseInt(part, radix);
+	    }
+	    numbers.push(number);
+	  }
+	  for (index = 0; index < partsLength; index++) {
+	    number = numbers[index];
+	    if (index == partsLength - 1) {
+	      if (number >= pow$1(256, 5 - partsLength)) return null;
+	    } else if (number > 255) return null;
+	  }
+	  ipv4 = numbers.pop();
+	  for (index = 0; index < numbers.length; index++) {
+	    ipv4 += numbers[index] * pow$1(256, 3 - index);
+	  }
+	  return ipv4;
+	};
+
+	// eslint-disable-next-line max-statements -- TODO
+	var parseIPv6 = function (input) {
+	  var address = [0, 0, 0, 0, 0, 0, 0, 0];
+	  var pieceIndex = 0;
+	  var compress = null;
+	  var pointer = 0;
+	  var value, length, numbersSeen, ipv4Piece, number, swaps, swap;
+
+	  var char = function () {
+	    return input.charAt(pointer);
+	  };
+
+	  if (char() == ':') {
+	    if (input.charAt(1) != ':') return;
+	    pointer += 2;
+	    pieceIndex++;
+	    compress = pieceIndex;
+	  }
+	  while (char()) {
+	    if (pieceIndex == 8) return;
+	    if (char() == ':') {
+	      if (compress !== null) return;
+	      pointer++;
+	      pieceIndex++;
+	      compress = pieceIndex;
+	      continue;
+	    }
+	    value = length = 0;
+	    while (length < 4 && HEX.test(char())) {
+	      value = value * 16 + parseInt(char(), 16);
+	      pointer++;
+	      length++;
+	    }
+	    if (char() == '.') {
+	      if (length == 0) return;
+	      pointer -= length;
+	      if (pieceIndex > 6) return;
+	      numbersSeen = 0;
+	      while (char()) {
+	        ipv4Piece = null;
+	        if (numbersSeen > 0) {
+	          if (char() == '.' && numbersSeen < 4) pointer++;
+	          else return;
+	        }
+	        if (!DIGIT.test(char())) return;
+	        while (DIGIT.test(char())) {
+	          number = parseInt(char(), 10);
+	          if (ipv4Piece === null) ipv4Piece = number;
+	          else if (ipv4Piece == 0) return;
+	          else ipv4Piece = ipv4Piece * 10 + number;
+	          if (ipv4Piece > 255) return;
+	          pointer++;
+	        }
+	        address[pieceIndex] = address[pieceIndex] * 256 + ipv4Piece;
+	        numbersSeen++;
+	        if (numbersSeen == 2 || numbersSeen == 4) pieceIndex++;
+	      }
+	      if (numbersSeen != 4) return;
+	      break;
+	    } else if (char() == ':') {
+	      pointer++;
+	      if (!char()) return;
+	    } else if (char()) return;
+	    address[pieceIndex++] = value;
+	  }
+	  if (compress !== null) {
+	    swaps = pieceIndex - compress;
+	    pieceIndex = 7;
+	    while (pieceIndex != 0 && swaps > 0) {
+	      swap = address[pieceIndex];
+	      address[pieceIndex--] = address[compress + swaps - 1];
+	      address[compress + --swaps] = swap;
+	    }
+	  } else if (pieceIndex != 8) return;
+	  return address;
+	};
+
+	var findLongestZeroSequence = function (ipv6) {
+	  var maxIndex = null;
+	  var maxLength = 1;
+	  var currStart = null;
+	  var currLength = 0;
+	  var index = 0;
+	  for (; index < 8; index++) {
+	    if (ipv6[index] !== 0) {
+	      if (currLength > maxLength) {
+	        maxIndex = currStart;
+	        maxLength = currLength;
+	      }
+	      currStart = null;
+	      currLength = 0;
+	    } else {
+	      if (currStart === null) currStart = index;
+	      ++currLength;
+	    }
+	  }
+	  if (currLength > maxLength) {
+	    maxIndex = currStart;
+	    maxLength = currLength;
+	  }
+	  return maxIndex;
+	};
+
+	var serializeHost = function (host) {
+	  var result, index, compress, ignore0;
+	  // ipv4
+	  if (typeof host == 'number') {
+	    result = [];
+	    for (index = 0; index < 4; index++) {
+	      result.unshift(host % 256);
+	      host = floor$2(host / 256);
+	    } return result.join('.');
+	  // ipv6
+	  } else if (typeof host == 'object') {
+	    result = '';
+	    compress = findLongestZeroSequence(host);
+	    for (index = 0; index < 8; index++) {
+	      if (ignore0 && host[index] === 0) continue;
+	      if (ignore0) ignore0 = false;
+	      if (compress === index) {
+	        result += index ? ':' : '::';
+	        ignore0 = true;
+	      } else {
+	        result += host[index].toString(16);
+	        if (index < 7) result += ':';
+	      }
+	    }
+	    return '[' + result + ']';
+	  } return host;
+	};
 
-	function Body() {
-	  this.bodyUsed = false;
+	var C0ControlPercentEncodeSet = {};
+	var fragmentPercentEncodeSet = assign$2({}, C0ControlPercentEncodeSet, {
+	  ' ': 1, '"': 1, '<': 1, '>': 1, '`': 1
+	});
+	var pathPercentEncodeSet = assign$2({}, fragmentPercentEncodeSet, {
+	  '#': 1, '?': 1, '{': 1, '}': 1
+	});
+	var userinfoPercentEncodeSet = assign$2({}, pathPercentEncodeSet, {
+	  '/': 1, ':': 1, ';': 1, '=': 1, '@': 1, '[': 1, '\\': 1, ']': 1, '^': 1, '|': 1
+	});
 
-	  this._initBody = function(body) {
-	    /*
-	      fetch-mock wraps the Response object in an ES6 Proxy to
-	      provide useful test harness features such as flush. However, on
-	      ES5 browsers without fetch or Proxy support pollyfills must be used;
-	      the proxy-pollyfill is unable to proxy an attribute unless it exists
-	      on the object before the Proxy is created. This change ensures
-	      Response.bodyUsed exists on the instance, while maintaining the
-	      semantic of setting Request.bodyUsed in the constructor before
-	      _initBody is called.
-	    */
-	    this.bodyUsed = this.bodyUsed;
-	    this._bodyInit = body;
-	    if (!body) {
-	      this._bodyText = '';
-	    } else if (typeof body === 'string') {
-	      this._bodyText = body;
-	    } else if (support.blob && Blob.prototype.isPrototypeOf(body)) {
-	      this._bodyBlob = body;
-	    } else if (support.formData && FormData.prototype.isPrototypeOf(body)) {
-	      this._bodyFormData = body;
-	    } else if (support.searchParams && URLSearchParams.prototype.isPrototypeOf(body)) {
-	      this._bodyText = body.toString();
-	    } else if (support.arrayBuffer && support.blob && isDataView(body)) {
-	      this._bodyArrayBuffer = bufferClone(body.buffer);
-	      // IE 10-11 can't handle a DataView body.
-	      this._bodyInit = new Blob([this._bodyArrayBuffer]);
-	    } else if (support.arrayBuffer && (ArrayBuffer.prototype.isPrototypeOf(body) || isArrayBufferView(body))) {
-	      this._bodyArrayBuffer = bufferClone(body);
-	    } else {
-	      this._bodyText = body = Object.prototype.toString.call(body);
-	    }
+	var percentEncode = function (char, set) {
+	  var code = codeAt(char, 0);
+	  return code > 0x20 && code < 0x7F && !has$4(set, char) ? char : encodeURIComponent(char);
+	};
 
-	    if (!this.headers.get('content-type')) {
-	      if (typeof body === 'string') {
-	        this.headers.set('content-type', 'text/plain;charset=UTF-8');
-	      } else if (this._bodyBlob && this._bodyBlob.type) {
-	        this.headers.set('content-type', this._bodyBlob.type);
-	      } else if (support.searchParams && URLSearchParams.prototype.isPrototypeOf(body)) {
-	        this.headers.set('content-type', 'application/x-www-form-urlencoded;charset=UTF-8');
-	      }
-	    }
-	  };
+	var specialSchemes = {
+	  ftp: 21,
+	  file: null,
+	  http: 80,
+	  https: 443,
+	  ws: 80,
+	  wss: 443
+	};
 
-	  if (support.blob) {
-	    this.blob = function() {
-	      var rejected = consumed(this);
-	      if (rejected) {
-	        return rejected
-	      }
+	var isSpecial = function (url) {
+	  return has$4(specialSchemes, url.scheme);
+	};
 
-	      if (this._bodyBlob) {
-	        return Promise.resolve(this._bodyBlob)
-	      } else if (this._bodyArrayBuffer) {
-	        return Promise.resolve(new Blob([this._bodyArrayBuffer]))
-	      } else if (this._bodyFormData) {
-	        throw new Error('could not read FormData body as blob')
-	      } else {
-	        return Promise.resolve(new Blob([this._bodyText]))
-	      }
-	    };
+	var includesCredentials = function (url) {
+	  return url.username != '' || url.password != '';
+	};
 
-	    this.arrayBuffer = function() {
-	      if (this._bodyArrayBuffer) {
-	        return consumed(this) || Promise.resolve(this._bodyArrayBuffer)
-	      } else {
-	        return this.blob().then(readBlobAsArrayBuffer)
-	      }
-	    };
-	  }
+	var cannotHaveUsernamePasswordPort = function (url) {
+	  return !url.host || url.cannotBeABaseURL || url.scheme == 'file';
+	};
 
-	  this.text = function() {
-	    var rejected = consumed(this);
-	    if (rejected) {
-	      return rejected
-	    }
+	var isWindowsDriveLetter = function (string, normalized) {
+	  var second;
+	  return string.length == 2 && ALPHA.test(string.charAt(0))
+	    && ((second = string.charAt(1)) == ':' || (!normalized && second == '|'));
+	};
 
-	    if (this._bodyBlob) {
-	      return readBlobAsText(this._bodyBlob)
-	    } else if (this._bodyArrayBuffer) {
-	      return Promise.resolve(readArrayBufferAsText(this._bodyArrayBuffer))
-	    } else if (this._bodyFormData) {
-	      throw new Error('could not read FormData body as text')
-	    } else {
-	      return Promise.resolve(this._bodyText)
-	    }
-	  };
+	var startsWithWindowsDriveLetter = function (string) {
+	  var third;
+	  return string.length > 1 && isWindowsDriveLetter(string.slice(0, 2)) && (
+	    string.length == 2 ||
+	    ((third = string.charAt(2)) === '/' || third === '\\' || third === '?' || third === '#')
+	  );
+	};
 
-	  if (support.formData) {
-	    this.formData = function() {
-	      return this.text().then(decode)
-	    };
-	  }
+	var shortenURLsPath = function (url) {
+	  var path = url.path;
+	  var pathSize = path.length;
+	  if (pathSize && (url.scheme != 'file' || pathSize != 1 || !isWindowsDriveLetter(path[0], true))) {
+	    path.pop();
+	  }
+	};
+
+	var isSingleDot = function (segment) {
+	  return segment === '.' || segment.toLowerCase() === '%2e';
+	};
+
+	var isDoubleDot = function (segment) {
+	  segment = segment.toLowerCase();
+	  return segment === '..' || segment === '%2e.' || segment === '.%2e' || segment === '%2e%2e';
+	};
+
+	// States:
+	var SCHEME_START = {};
+	var SCHEME = {};
+	var NO_SCHEME = {};
+	var SPECIAL_RELATIVE_OR_AUTHORITY = {};
+	var PATH_OR_AUTHORITY = {};
+	var RELATIVE = {};
+	var RELATIVE_SLASH = {};
+	var SPECIAL_AUTHORITY_SLASHES = {};
+	var SPECIAL_AUTHORITY_IGNORE_SLASHES = {};
+	var AUTHORITY = {};
+	var HOST = {};
+	var HOSTNAME = {};
+	var PORT = {};
+	var FILE = {};
+	var FILE_SLASH = {};
+	var FILE_HOST = {};
+	var PATH_START = {};
+	var PATH = {};
+	var CANNOT_BE_A_BASE_URL_PATH = {};
+	var QUERY = {};
+	var FRAGMENT = {};
+
+	// eslint-disable-next-line max-statements -- TODO
+	var parseURL = function (url, input, stateOverride, base) {
+	  var state = stateOverride || SCHEME_START;
+	  var pointer = 0;
+	  var buffer = '';
+	  var seenAt = false;
+	  var seenBracket = false;
+	  var seenPasswordToken = false;
+	  var codePoints, char, bufferCodePoints, failure;
+
+	  if (!stateOverride) {
+	    url.scheme = '';
+	    url.username = '';
+	    url.password = '';
+	    url.host = null;
+	    url.port = null;
+	    url.path = [];
+	    url.query = null;
+	    url.fragment = null;
+	    url.cannotBeABaseURL = false;
+	    input = input.replace(LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE, '');
+	  }
+
+	  input = input.replace(TAB_AND_NEW_LINE, '');
+
+	  codePoints = arrayFrom(input);
+
+	  while (pointer <= codePoints.length) {
+	    char = codePoints[pointer];
+	    switch (state) {
+	      case SCHEME_START:
+	        if (char && ALPHA.test(char)) {
+	          buffer += char.toLowerCase();
+	          state = SCHEME;
+	        } else if (!stateOverride) {
+	          state = NO_SCHEME;
+	          continue;
+	        } else return INVALID_SCHEME;
+	        break;
 
-	  this.json = function() {
-	    return this.text().then(JSON.parse)
-	  };
+	      case SCHEME:
+	        if (char && (ALPHANUMERIC.test(char) || char == '+' || char == '-' || char == '.')) {
+	          buffer += char.toLowerCase();
+	        } else if (char == ':') {
+	          if (stateOverride && (
+	            (isSpecial(url) != has$4(specialSchemes, buffer)) ||
+	            (buffer == 'file' && (includesCredentials(url) || url.port !== null)) ||
+	            (url.scheme == 'file' && !url.host)
+	          )) return;
+	          url.scheme = buffer;
+	          if (stateOverride) {
+	            if (isSpecial(url) && specialSchemes[url.scheme] == url.port) url.port = null;
+	            return;
+	          }
+	          buffer = '';
+	          if (url.scheme == 'file') {
+	            state = FILE;
+	          } else if (isSpecial(url) && base && base.scheme == url.scheme) {
+	            state = SPECIAL_RELATIVE_OR_AUTHORITY;
+	          } else if (isSpecial(url)) {
+	            state = SPECIAL_AUTHORITY_SLASHES;
+	          } else if (codePoints[pointer + 1] == '/') {
+	            state = PATH_OR_AUTHORITY;
+	            pointer++;
+	          } else {
+	            url.cannotBeABaseURL = true;
+	            url.path.push('');
+	            state = CANNOT_BE_A_BASE_URL_PATH;
+	          }
+	        } else if (!stateOverride) {
+	          buffer = '';
+	          state = NO_SCHEME;
+	          pointer = 0;
+	          continue;
+	        } else return INVALID_SCHEME;
+	        break;
 
-	  return this
-	}
+	      case NO_SCHEME:
+	        if (!base || (base.cannotBeABaseURL && char != '#')) return INVALID_SCHEME;
+	        if (base.cannotBeABaseURL && char == '#') {
+	          url.scheme = base.scheme;
+	          url.path = base.path.slice();
+	          url.query = base.query;
+	          url.fragment = '';
+	          url.cannotBeABaseURL = true;
+	          state = FRAGMENT;
+	          break;
+	        }
+	        state = base.scheme == 'file' ? FILE : RELATIVE;
+	        continue;
 
-	// HTTP methods whose capitalization should be normalized
-	var methods = ['DELETE', 'GET', 'HEAD', 'OPTIONS', 'POST', 'PUT'];
+	      case SPECIAL_RELATIVE_OR_AUTHORITY:
+	        if (char == '/' && codePoints[pointer + 1] == '/') {
+	          state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
+	          pointer++;
+	        } else {
+	          state = RELATIVE;
+	          continue;
+	        } break;
 
-	function normalizeMethod(method) {
-	  var upcased = method.toUpperCase();
-	  return methods.indexOf(upcased) > -1 ? upcased : method
-	}
+	      case PATH_OR_AUTHORITY:
+	        if (char == '/') {
+	          state = AUTHORITY;
+	          break;
+	        } else {
+	          state = PATH;
+	          continue;
+	        }
 
-	function Request(input, options) {
-	  options = options || {};
-	  var body = options.body;
+	      case RELATIVE:
+	        url.scheme = base.scheme;
+	        if (char == EOF) {
+	          url.username = base.username;
+	          url.password = base.password;
+	          url.host = base.host;
+	          url.port = base.port;
+	          url.path = base.path.slice();
+	          url.query = base.query;
+	        } else if (char == '/' || (char == '\\' && isSpecial(url))) {
+	          state = RELATIVE_SLASH;
+	        } else if (char == '?') {
+	          url.username = base.username;
+	          url.password = base.password;
+	          url.host = base.host;
+	          url.port = base.port;
+	          url.path = base.path.slice();
+	          url.query = '';
+	          state = QUERY;
+	        } else if (char == '#') {
+	          url.username = base.username;
+	          url.password = base.password;
+	          url.host = base.host;
+	          url.port = base.port;
+	          url.path = base.path.slice();
+	          url.query = base.query;
+	          url.fragment = '';
+	          state = FRAGMENT;
+	        } else {
+	          url.username = base.username;
+	          url.password = base.password;
+	          url.host = base.host;
+	          url.port = base.port;
+	          url.path = base.path.slice();
+	          url.path.pop();
+	          state = PATH;
+	          continue;
+	        } break;
 
-	  if (input instanceof Request) {
-	    if (input.bodyUsed) {
-	      throw new TypeError('Already read')
-	    }
-	    this.url = input.url;
-	    this.credentials = input.credentials;
-	    if (!options.headers) {
-	      this.headers = new Headers(input.headers);
-	    }
-	    this.method = input.method;
-	    this.mode = input.mode;
-	    this.signal = input.signal;
-	    if (!body && input._bodyInit != null) {
-	      body = input._bodyInit;
-	      input.bodyUsed = true;
-	    }
-	  } else {
-	    this.url = String(input);
-	  }
+	      case RELATIVE_SLASH:
+	        if (isSpecial(url) && (char == '/' || char == '\\')) {
+	          state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
+	        } else if (char == '/') {
+	          state = AUTHORITY;
+	        } else {
+	          url.username = base.username;
+	          url.password = base.password;
+	          url.host = base.host;
+	          url.port = base.port;
+	          state = PATH;
+	          continue;
+	        } break;
 
-	  this.credentials = options.credentials || this.credentials || 'same-origin';
-	  if (options.headers || !this.headers) {
-	    this.headers = new Headers(options.headers);
-	  }
-	  this.method = normalizeMethod(options.method || this.method || 'GET');
-	  this.mode = options.mode || this.mode || null;
-	  this.signal = options.signal || this.signal;
-	  this.referrer = null;
+	      case SPECIAL_AUTHORITY_SLASHES:
+	        state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
+	        if (char != '/' || buffer.charAt(pointer + 1) != '/') continue;
+	        pointer++;
+	        break;
 
-	  if ((this.method === 'GET' || this.method === 'HEAD') && body) {
-	    throw new TypeError('Body not allowed for GET or HEAD requests')
-	  }
-	  this._initBody(body);
+	      case SPECIAL_AUTHORITY_IGNORE_SLASHES:
+	        if (char != '/' && char != '\\') {
+	          state = AUTHORITY;
+	          continue;
+	        } break;
+
+	      case AUTHORITY:
+	        if (char == '@') {
+	          if (seenAt) buffer = '%40' + buffer;
+	          seenAt = true;
+	          bufferCodePoints = arrayFrom(buffer);
+	          for (var i = 0; i < bufferCodePoints.length; i++) {
+	            var codePoint = bufferCodePoints[i];
+	            if (codePoint == ':' && !seenPasswordToken) {
+	              seenPasswordToken = true;
+	              continue;
+	            }
+	            var encodedCodePoints = percentEncode(codePoint, userinfoPercentEncodeSet);
+	            if (seenPasswordToken) url.password += encodedCodePoints;
+	            else url.username += encodedCodePoints;
+	          }
+	          buffer = '';
+	        } else if (
+	          char == EOF || char == '/' || char == '?' || char == '#' ||
+	          (char == '\\' && isSpecial(url))
+	        ) {
+	          if (seenAt && buffer == '') return INVALID_AUTHORITY;
+	          pointer -= arrayFrom(buffer).length + 1;
+	          buffer = '';
+	          state = HOST;
+	        } else buffer += char;
+	        break;
 
-	  if (this.method === 'GET' || this.method === 'HEAD') {
-	    if (options.cache === 'no-store' || options.cache === 'no-cache') {
-	      // Search for a '_' parameter in the query string
-	      var reParamSearch = /([?&])_=[^&]*/;
-	      if (reParamSearch.test(this.url)) {
-	        // If it already exists then set the value with the current time
-	        this.url = this.url.replace(reParamSearch, '$1_=' + new Date().getTime());
-	      } else {
-	        // Otherwise add a new '_' parameter to the end with the current time
-	        var reQueryString = /\?/;
-	        this.url += (reQueryString.test(this.url) ? '&' : '?') + '_=' + new Date().getTime();
-	      }
+	      case HOST:
+	      case HOSTNAME:
+	        if (stateOverride && url.scheme == 'file') {
+	          state = FILE_HOST;
+	          continue;
+	        } else if (char == ':' && !seenBracket) {
+	          if (buffer == '') return INVALID_HOST;
+	          failure = parseHost(url, buffer);
+	          if (failure) return failure;
+	          buffer = '';
+	          state = PORT;
+	          if (stateOverride == HOSTNAME) return;
+	        } else if (
+	          char == EOF || char == '/' || char == '?' || char == '#' ||
+	          (char == '\\' && isSpecial(url))
+	        ) {
+	          if (isSpecial(url) && buffer == '') return INVALID_HOST;
+	          if (stateOverride && buffer == '' && (includesCredentials(url) || url.port !== null)) return;
+	          failure = parseHost(url, buffer);
+	          if (failure) return failure;
+	          buffer = '';
+	          state = PATH_START;
+	          if (stateOverride) return;
+	          continue;
+	        } else {
+	          if (char == '[') seenBracket = true;
+	          else if (char == ']') seenBracket = false;
+	          buffer += char;
+	        } break;
+
+	      case PORT:
+	        if (DIGIT.test(char)) {
+	          buffer += char;
+	        } else if (
+	          char == EOF || char == '/' || char == '?' || char == '#' ||
+	          (char == '\\' && isSpecial(url)) ||
+	          stateOverride
+	        ) {
+	          if (buffer != '') {
+	            var port = parseInt(buffer, 10);
+	            if (port > 0xFFFF) return INVALID_PORT;
+	            url.port = (isSpecial(url) && port === specialSchemes[url.scheme]) ? null : port;
+	            buffer = '';
+	          }
+	          if (stateOverride) return;
+	          state = PATH_START;
+	          continue;
+	        } else return INVALID_PORT;
+	        break;
+
+	      case FILE:
+	        url.scheme = 'file';
+	        if (char == '/' || char == '\\') state = FILE_SLASH;
+	        else if (base && base.scheme == 'file') {
+	          if (char == EOF) {
+	            url.host = base.host;
+	            url.path = base.path.slice();
+	            url.query = base.query;
+	          } else if (char == '?') {
+	            url.host = base.host;
+	            url.path = base.path.slice();
+	            url.query = '';
+	            state = QUERY;
+	          } else if (char == '#') {
+	            url.host = base.host;
+	            url.path = base.path.slice();
+	            url.query = base.query;
+	            url.fragment = '';
+	            state = FRAGMENT;
+	          } else {
+	            if (!startsWithWindowsDriveLetter(codePoints.slice(pointer).join(''))) {
+	              url.host = base.host;
+	              url.path = base.path.slice();
+	              shortenURLsPath(url);
+	            }
+	            state = PATH;
+	            continue;
+	          }
+	        } else {
+	          state = PATH;
+	          continue;
+	        } break;
+
+	      case FILE_SLASH:
+	        if (char == '/' || char == '\\') {
+	          state = FILE_HOST;
+	          break;
+	        }
+	        if (base && base.scheme == 'file' && !startsWithWindowsDriveLetter(codePoints.slice(pointer).join(''))) {
+	          if (isWindowsDriveLetter(base.path[0], true)) url.path.push(base.path[0]);
+	          else url.host = base.host;
+	        }
+	        state = PATH;
+	        continue;
+
+	      case FILE_HOST:
+	        if (char == EOF || char == '/' || char == '\\' || char == '?' || char == '#') {
+	          if (!stateOverride && isWindowsDriveLetter(buffer)) {
+	            state = PATH;
+	          } else if (buffer == '') {
+	            url.host = '';
+	            if (stateOverride) return;
+	            state = PATH_START;
+	          } else {
+	            failure = parseHost(url, buffer);
+	            if (failure) return failure;
+	            if (url.host == 'localhost') url.host = '';
+	            if (stateOverride) return;
+	            buffer = '';
+	            state = PATH_START;
+	          } continue;
+	        } else buffer += char;
+	        break;
+
+	      case PATH_START:
+	        if (isSpecial(url)) {
+	          state = PATH;
+	          if (char != '/' && char != '\\') continue;
+	        } else if (!stateOverride && char == '?') {
+	          url.query = '';
+	          state = QUERY;
+	        } else if (!stateOverride && char == '#') {
+	          url.fragment = '';
+	          state = FRAGMENT;
+	        } else if (char != EOF) {
+	          state = PATH;
+	          if (char != '/') continue;
+	        } break;
+
+	      case PATH:
+	        if (
+	          char == EOF || char == '/' ||
+	          (char == '\\' && isSpecial(url)) ||
+	          (!stateOverride && (char == '?' || char == '#'))
+	        ) {
+	          if (isDoubleDot(buffer)) {
+	            shortenURLsPath(url);
+	            if (char != '/' && !(char == '\\' && isSpecial(url))) {
+	              url.path.push('');
+	            }
+	          } else if (isSingleDot(buffer)) {
+	            if (char != '/' && !(char == '\\' && isSpecial(url))) {
+	              url.path.push('');
+	            }
+	          } else {
+	            if (url.scheme == 'file' && !url.path.length && isWindowsDriveLetter(buffer)) {
+	              if (url.host) url.host = '';
+	              buffer = buffer.charAt(0) + ':'; // normalize windows drive letter
+	            }
+	            url.path.push(buffer);
+	          }
+	          buffer = '';
+	          if (url.scheme == 'file' && (char == EOF || char == '?' || char == '#')) {
+	            while (url.path.length > 1 && url.path[0] === '') {
+	              url.path.shift();
+	            }
+	          }
+	          if (char == '?') {
+	            url.query = '';
+	            state = QUERY;
+	          } else if (char == '#') {
+	            url.fragment = '';
+	            state = FRAGMENT;
+	          }
+	        } else {
+	          buffer += percentEncode(char, pathPercentEncodeSet);
+	        } break;
+
+	      case CANNOT_BE_A_BASE_URL_PATH:
+	        if (char == '?') {
+	          url.query = '';
+	          state = QUERY;
+	        } else if (char == '#') {
+	          url.fragment = '';
+	          state = FRAGMENT;
+	        } else if (char != EOF) {
+	          url.path[0] += percentEncode(char, C0ControlPercentEncodeSet);
+	        } break;
+
+	      case QUERY:
+	        if (!stateOverride && char == '#') {
+	          url.fragment = '';
+	          state = FRAGMENT;
+	        } else if (char != EOF) {
+	          if (char == "'" && isSpecial(url)) url.query += '%27';
+	          else if (char == '#') url.query += '%23';
+	          else url.query += percentEncode(char, C0ControlPercentEncodeSet);
+	        } break;
+
+	      case FRAGMENT:
+	        if (char != EOF) url.fragment += percentEncode(char, fragmentPercentEncodeSet);
+	        break;
 	    }
+
+	    pointer++;
 	  }
-	}
+	};
 
-	Request.prototype.clone = function() {
-	  return new Request(this, {body: this._bodyInit})
+	// `URL` constructor
+	// https://url.spec.whatwg.org/#url-class
+	var URLConstructor = function URL(url /* , base */) {
+	  var that = anInstance$2(this, URLConstructor, 'URL');
+	  var base = arguments.length > 1 ? arguments[1] : undefined;
+	  var urlString = String(url);
+	  var state = setInternalState$1(that, { type: 'URL' });
+	  var baseState, failure;
+	  if (base !== undefined) {
+	    if (base instanceof URLConstructor) baseState = getInternalURLState(base);
+	    else {
+	      failure = parseURL(baseState = {}, String(base));
+	      if (failure) throw TypeError(failure);
+	    }
+	  }
+	  failure = parseURL(state, urlString, null, baseState);
+	  if (failure) throw TypeError(failure);
+	  var searchParams = state.searchParams = new URLSearchParams$1();
+	  var searchParamsState = getInternalSearchParamsState(searchParams);
+	  searchParamsState.updateSearchParams(state.query);
+	  searchParamsState.updateURL = function () {
+	    state.query = String(searchParams) || null;
+	  };
+	  if (!DESCRIPTORS$a) {
+	    that.href = serializeURL.call(that);
+	    that.origin = getOrigin.call(that);
+	    that.protocol = getProtocol.call(that);
+	    that.username = getUsername.call(that);
+	    that.password = getPassword.call(that);
+	    that.host = getHost.call(that);
+	    that.hostname = getHostname.call(that);
+	    that.port = getPort.call(that);
+	    that.pathname = getPathname.call(that);
+	    that.search = getSearch.call(that);
+	    that.searchParams = getSearchParams.call(that);
+	    that.hash = getHash.call(that);
+	  }
 	};
 
-	function decode(body) {
-	  var form = new FormData();
-	  body
-	    .trim()
-	    .split('&')
-	    .forEach(function(bytes) {
-	      if (bytes) {
-	        var split = bytes.split('=');
-	        var name = split.shift().replace(/\+/g, ' ');
-	        var value = split.join('=').replace(/\+/g, ' ');
-	        form.append(decodeURIComponent(name), decodeURIComponent(value));
-	      }
-	    });
-	  return form
-	}
+	var URLPrototype = URLConstructor.prototype;
 
-	function parseHeaders(rawHeaders) {
-	  var headers = new Headers();
-	  // Replace instances of \r\n and \n followed by at least one space or horizontal tab with a space
-	  // https://tools.ietf.org/html/rfc7230#section-3.2
-	  var preProcessedHeaders = rawHeaders.replace(/\r?\n[\t ]+/g, ' ');
-	  preProcessedHeaders.split(/\r?\n/).forEach(function(line) {
-	    var parts = line.split(':');
-	    var key = parts.shift().trim();
-	    if (key) {
-	      var value = parts.join(':').trim();
-	      headers.append(key, value);
+	var serializeURL = function () {
+	  var url = getInternalURLState(this);
+	  var scheme = url.scheme;
+	  var username = url.username;
+	  var password = url.password;
+	  var host = url.host;
+	  var port = url.port;
+	  var path = url.path;
+	  var query = url.query;
+	  var fragment = url.fragment;
+	  var output = scheme + ':';
+	  if (host !== null) {
+	    output += '//';
+	    if (includesCredentials(url)) {
+	      output += username + (password ? ':' + password : '') + '@';
 	    }
-	  });
-	  return headers
-	}
-
-	Body.call(Request.prototype);
+	    output += serializeHost(host);
+	    if (port !== null) output += ':' + port;
+	  } else if (scheme == 'file') output += '//';
+	  output += url.cannotBeABaseURL ? path[0] : path.length ? '/' + path.join('/') : '';
+	  if (query !== null) output += '?' + query;
+	  if (fragment !== null) output += '#' + fragment;
+	  return output;
+	};
 
-	function Response(bodyInit, options) {
-	  if (!options) {
-	    options = {};
+	var getOrigin = function () {
+	  var url = getInternalURLState(this);
+	  var scheme = url.scheme;
+	  var port = url.port;
+	  if (scheme == 'blob') try {
+	    return new URLConstructor(scheme.path[0]).origin;
+	  } catch (error) {
+	    return 'null';
 	  }
+	  if (scheme == 'file' || !isSpecial(url)) return 'null';
+	  return scheme + '://' + serializeHost(url.host) + (port !== null ? ':' + port : '');
+	};
 
-	  this.type = 'default';
-	  this.status = options.status === undefined ? 200 : options.status;
-	  this.ok = this.status >= 200 && this.status < 300;
-	  this.statusText = 'statusText' in options ? options.statusText : '';
-	  this.headers = new Headers(options.headers);
-	  this.url = options.url || '';
-	  this._initBody(bodyInit);
-	}
-
-	Body.call(Response.prototype);
+	var getProtocol = function () {
+	  return getInternalURLState(this).scheme + ':';
+	};
 
-	Response.prototype.clone = function() {
-	  return new Response(this._bodyInit, {
-	    status: this.status,
-	    statusText: this.statusText,
-	    headers: new Headers(this.headers),
-	    url: this.url
-	  })
+	var getUsername = function () {
+	  return getInternalURLState(this).username;
 	};
 
-	Response.error = function() {
-	  var response = new Response(null, {status: 0, statusText: ''});
-	  response.type = 'error';
-	  return response
+	var getPassword = function () {
+	  return getInternalURLState(this).password;
 	};
 
-	var redirectStatuses = [301, 302, 303, 307, 308];
+	var getHost = function () {
+	  var url = getInternalURLState(this);
+	  var host = url.host;
+	  var port = url.port;
+	  return host === null ? ''
+	    : port === null ? serializeHost(host)
+	    : serializeHost(host) + ':' + port;
+	};
 
-	Response.redirect = function(url, status) {
-	  if (redirectStatuses.indexOf(status) === -1) {
-	    throw new RangeError('Invalid status code')
-	  }
+	var getHostname = function () {
+	  var host = getInternalURLState(this).host;
+	  return host === null ? '' : serializeHost(host);
+	};
 
-	  return new Response(null, {status: status, headers: {location: url}})
+	var getPort = function () {
+	  var port = getInternalURLState(this).port;
+	  return port === null ? '' : String(port);
 	};
 
-	var DOMException$1 = global$1.DOMException;
+	var getPathname = function () {
+	  var url = getInternalURLState(this);
+	  var path = url.path;
+	  return url.cannotBeABaseURL ? path[0] : path.length ? '/' + path.join('/') : '';
+	};
 
-	if (typeof DOMException$1 !== 'function') {
-	  DOMException$1 = function(message, name) {
-	    this.message = message;
-	    this.name = name;
-	    var error = Error(message);
-	    this.stack = error.stack;
-	  };
-	  DOMException$1.prototype = Object.create(Error.prototype);
-	  DOMException$1.prototype.constructor = DOMException$1;
-	}
+	var getSearch = function () {
+	  var query = getInternalURLState(this).query;
+	  return query ? '?' + query : '';
+	};
 
-	function fetch$1(input, init) {
-	  return new Promise(function(resolve, reject) {
-	    var request = new Request(input, init);
+	var getSearchParams = function () {
+	  return getInternalURLState(this).searchParams;
+	};
 
-	    if (request.signal && request.signal.aborted) {
-	      return reject(new DOMException$1('Aborted', 'AbortError'))
-	    }
+	var getHash = function () {
+	  var fragment = getInternalURLState(this).fragment;
+	  return fragment ? '#' + fragment : '';
+	};
 
-	    var xhr = new XMLHttpRequest();
+	var accessorDescriptor = function (getter, setter) {
+	  return { get: getter, set: setter, configurable: true, enumerable: true };
+	};
 
-	    function abortXhr() {
-	      xhr.abort();
-	    }
+	if (DESCRIPTORS$a) {
+	  defineProperties$1(URLPrototype, {
+	    // `URL.prototype.href` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-href
+	    href: accessorDescriptor(serializeURL, function (href) {
+	      var url = getInternalURLState(this);
+	      var urlString = String(href);
+	      var failure = parseURL(url, urlString);
+	      if (failure) throw TypeError(failure);
+	      getInternalSearchParamsState(url.searchParams).updateSearchParams(url.query);
+	    }),
+	    // `URL.prototype.origin` getter
+	    // https://url.spec.whatwg.org/#dom-url-origin
+	    origin: accessorDescriptor(getOrigin),
+	    // `URL.prototype.protocol` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-protocol
+	    protocol: accessorDescriptor(getProtocol, function (protocol) {
+	      var url = getInternalURLState(this);
+	      parseURL(url, String(protocol) + ':', SCHEME_START);
+	    }),
+	    // `URL.prototype.username` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-username
+	    username: accessorDescriptor(getUsername, function (username) {
+	      var url = getInternalURLState(this);
+	      var codePoints = arrayFrom(String(username));
+	      if (cannotHaveUsernamePasswordPort(url)) return;
+	      url.username = '';
+	      for (var i = 0; i < codePoints.length; i++) {
+	        url.username += percentEncode(codePoints[i], userinfoPercentEncodeSet);
+	      }
+	    }),
+	    // `URL.prototype.password` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-password
+	    password: accessorDescriptor(getPassword, function (password) {
+	      var url = getInternalURLState(this);
+	      var codePoints = arrayFrom(String(password));
+	      if (cannotHaveUsernamePasswordPort(url)) return;
+	      url.password = '';
+	      for (var i = 0; i < codePoints.length; i++) {
+	        url.password += percentEncode(codePoints[i], userinfoPercentEncodeSet);
+	      }
+	    }),
+	    // `URL.prototype.host` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-host
+	    host: accessorDescriptor(getHost, function (host) {
+	      var url = getInternalURLState(this);
+	      if (url.cannotBeABaseURL) return;
+	      parseURL(url, String(host), HOST);
+	    }),
+	    // `URL.prototype.hostname` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-hostname
+	    hostname: accessorDescriptor(getHostname, function (hostname) {
+	      var url = getInternalURLState(this);
+	      if (url.cannotBeABaseURL) return;
+	      parseURL(url, String(hostname), HOSTNAME);
+	    }),
+	    // `URL.prototype.port` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-port
+	    port: accessorDescriptor(getPort, function (port) {
+	      var url = getInternalURLState(this);
+	      if (cannotHaveUsernamePasswordPort(url)) return;
+	      port = String(port);
+	      if (port == '') url.port = null;
+	      else parseURL(url, port, PORT);
+	    }),
+	    // `URL.prototype.pathname` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-pathname
+	    pathname: accessorDescriptor(getPathname, function (pathname) {
+	      var url = getInternalURLState(this);
+	      if (url.cannotBeABaseURL) return;
+	      url.path = [];
+	      parseURL(url, pathname + '', PATH_START);
+	    }),
+	    // `URL.prototype.search` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-search
+	    search: accessorDescriptor(getSearch, function (search) {
+	      var url = getInternalURLState(this);
+	      search = String(search);
+	      if (search == '') {
+	        url.query = null;
+	      } else {
+	        if ('?' == search.charAt(0)) search = search.slice(1);
+	        url.query = '';
+	        parseURL(url, search, QUERY);
+	      }
+	      getInternalSearchParamsState(url.searchParams).updateSearchParams(url.query);
+	    }),
+	    // `URL.prototype.searchParams` getter
+	    // https://url.spec.whatwg.org/#dom-url-searchparams
+	    searchParams: accessorDescriptor(getSearchParams),
+	    // `URL.prototype.hash` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-hash
+	    hash: accessorDescriptor(getHash, function (hash) {
+	      var url = getInternalURLState(this);
+	      hash = String(hash);
+	      if (hash == '') {
+	        url.fragment = null;
+	        return;
+	      }
+	      if ('#' == hash.charAt(0)) hash = hash.slice(1);
+	      url.fragment = '';
+	      parseURL(url, hash, FRAGMENT);
+	    })
+	  });
+	}
 
-	    xhr.onload = function() {
-	      var options = {
-	        status: xhr.status,
-	        statusText: xhr.statusText,
-	        headers: parseHeaders(xhr.getAllResponseHeaders() || '')
-	      };
-	      options.url = 'responseURL' in xhr ? xhr.responseURL : options.headers.get('X-Request-URL');
-	      var body = 'response' in xhr ? xhr.response : xhr.responseText;
-	      setTimeout(function() {
-	        resolve(new Response(body, options));
-	      }, 0);
-	    };
+	// `URL.prototype.toJSON` method
+	// https://url.spec.whatwg.org/#dom-url-tojson
+	redefine$6(URLPrototype, 'toJSON', function toJSON() {
+	  return serializeURL.call(this);
+	}, { enumerable: true });
+
+	// `URL.prototype.toString` method
+	// https://url.spec.whatwg.org/#URL-stringification-behavior
+	redefine$6(URLPrototype, 'toString', function toString() {
+	  return serializeURL.call(this);
+	}, { enumerable: true });
+
+	if (NativeURL) {
+	  var nativeCreateObjectURL = NativeURL.createObjectURL;
+	  var nativeRevokeObjectURL = NativeURL.revokeObjectURL;
+	  // `URL.createObjectURL` method
+	  // https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL
+	  // eslint-disable-next-line no-unused-vars -- required for `.length`
+	  if (nativeCreateObjectURL) redefine$6(URLConstructor, 'createObjectURL', function createObjectURL(blob) {
+	    return nativeCreateObjectURL.apply(NativeURL, arguments);
+	  });
+	  // `URL.revokeObjectURL` method
+	  // https://developer.mozilla.org/en-US/docs/Web/API/URL/revokeObjectURL
+	  // eslint-disable-next-line no-unused-vars -- required for `.length`
+	  if (nativeRevokeObjectURL) redefine$6(URLConstructor, 'revokeObjectURL', function revokeObjectURL(url) {
+	    return nativeRevokeObjectURL.apply(NativeURL, arguments);
+	  });
+	}
 
-	    xhr.onerror = function() {
-	      setTimeout(function() {
-	        reject(new TypeError('Network request failed'));
-	      }, 0);
-	    };
+	setToStringTag$3(URLConstructor, 'URL');
 
-	    xhr.ontimeout = function() {
-	      setTimeout(function() {
-	        reject(new TypeError('Network request failed'));
-	      }, 0);
-	    };
+	$$Q({ global: true, forced: !USE_NATIVE_URL, sham: !DESCRIPTORS$a }, {
+	  URL: URLConstructor
+	});
 
-	    xhr.onabort = function() {
-	      setTimeout(function() {
-	        reject(new DOMException$1('Aborted', 'AbortError'));
-	      }, 0);
-	    };
+	var anObject$7 = anObject$m;
+
+	// `RegExp.prototype.flags` getter implementation
+	// https://tc39.es/ecma262/#sec-get-regexp.prototype.flags
+	var regexpFlags$1 = function () {
+	  var that = anObject$7(this);
+	  var result = '';
+	  if (that.global) result += 'g';
+	  if (that.ignoreCase) result += 'i';
+	  if (that.multiline) result += 'm';
+	  if (that.dotAll) result += 's';
+	  if (that.unicode) result += 'u';
+	  if (that.sticky) result += 'y';
+	  return result;
+	};
 
-	    function fixUrl(url) {
-	      try {
-	        return url === '' && global$1.location.href ? global$1.location.href : url
-	      } catch (e) {
-	        return url
-	      }
-	    }
+	var redefine$5 = redefine$g.exports;
+	var anObject$6 = anObject$m;
+	var fails$q = fails$N;
+	var flags = regexpFlags$1;
 
-	    xhr.open(request.method, fixUrl(request.url), true);
+	var TO_STRING = 'toString';
+	var RegExpPrototype$2 = RegExp.prototype;
+	var nativeToString = RegExpPrototype$2[TO_STRING];
 
-	    if (request.credentials === 'include') {
-	      xhr.withCredentials = true;
-	    } else if (request.credentials === 'omit') {
-	      xhr.withCredentials = false;
-	    }
+	var NOT_GENERIC = fails$q(function () { return nativeToString.call({ source: 'a', flags: 'b' }) != '/a/b'; });
+	// FF44- RegExp#toString has a wrong name
+	var INCORRECT_NAME = nativeToString.name != TO_STRING;
 
-	    if ('responseType' in xhr) {
-	      if (support.blob) {
-	        xhr.responseType = 'blob';
-	      } else if (
-	        support.arrayBuffer &&
-	        request.headers.get('Content-Type') &&
-	        request.headers.get('Content-Type').indexOf('application/octet-stream') !== -1
-	      ) {
-	        xhr.responseType = 'arraybuffer';
-	      }
-	    }
+	// `RegExp.prototype.toString` method
+	// https://tc39.es/ecma262/#sec-regexp.prototype.tostring
+	if (NOT_GENERIC || INCORRECT_NAME) {
+	  redefine$5(RegExp.prototype, TO_STRING, function toString() {
+	    var R = anObject$6(this);
+	    var p = String(R.source);
+	    var rf = R.flags;
+	    var f = String(rf === undefined && R instanceof RegExp && !('flags' in RegExpPrototype$2) ? flags.call(R) : rf);
+	    return '/' + p + '/' + f;
+	  }, { unsafe: true });
+	}
 
-	    request.headers.forEach(function(value, name) {
-	      xhr.setRequestHeader(name, value);
-	    });
+	var regexpStickyHelpers = {};
 
-	    if (request.signal) {
-	      request.signal.addEventListener('abort', abortXhr);
+	var fails$p = fails$N;
 
-	      xhr.onreadystatechange = function() {
-	        // DONE (success or failure)
-	        if (xhr.readyState === 4) {
-	          request.signal.removeEventListener('abort', abortXhr);
-	        }
-	      };
-	    }
+	// babel-minify transpiles RegExp('a', 'y') -> /a/y and it causes SyntaxError,
+	var RE = function (s, f) {
+	  return RegExp(s, f);
+	};
 
-	    xhr.send(typeof request._bodyInit === 'undefined' ? null : request._bodyInit);
-	  })
-	}
+	regexpStickyHelpers.UNSUPPORTED_Y = fails$p(function () {
+	  var re = RE('a', 'y');
+	  re.lastIndex = 2;
+	  return re.exec('abcd') != null;
+	});
 
-	fetch$1.polyfill = true;
+	regexpStickyHelpers.BROKEN_CARET = fails$p(function () {
+	  // https://bugzilla.mozilla.org/show_bug.cgi?id=773687
+	  var re = RE('^r', 'gy');
+	  re.lastIndex = 2;
+	  return re.exec('str') != null;
+	});
 
-	if (!global$1.fetch) {
-	  global$1.fetch = fetch$1;
-	  global$1.Headers = Headers;
-	  global$1.Request = Request;
-	  global$1.Response = Response;
-	}
+	var fails$o = fails$N;
 
-	var lib = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
+	var regexpUnsupportedDotAll = fails$o(function () {
+	  // babel-minify transpiles RegExp('.', 's') -> /./s and it causes SyntaxError
+	  var re = RegExp('.', (typeof '').charAt(0));
+	  return !(re.dotAll && re.exec('\n') && re.flags === 's');
+	});
 
+	var fails$n = fails$N;
 
+	var regexpUnsupportedNcg = fails$n(function () {
+	  // babel-minify transpiles RegExp('.', 'g') -> /./g and it causes SyntaxError
+	  var re = RegExp('(?<a>b)', (typeof '').charAt(5));
+	  return re.exec('b').groups.a !== 'b' ||
+	    'b'.replace(re, '$<a>c') !== 'bc';
+	});
 
+	/* eslint-disable regexp/no-assertion-capturing-group, regexp/no-empty-group, regexp/no-lazy-ends -- testing */
+	/* eslint-disable regexp/no-useless-quantifier -- testing */
+	var regexpFlags = regexpFlags$1;
+	var stickyHelpers$2 = regexpStickyHelpers;
+	var shared = shared$5.exports;
+	var create$7 = objectCreate;
+	var getInternalState = internalState.get;
+	var UNSUPPORTED_DOT_ALL$1 = regexpUnsupportedDotAll;
+	var UNSUPPORTED_NCG$1 = regexpUnsupportedNcg;
+
+	var nativeExec = RegExp.prototype.exec;
+	var nativeReplace = shared('native-string-replace', String.prototype.replace);
+
+	var patchedExec = nativeExec;
+
+	var UPDATES_LAST_INDEX_WRONG = (function () {
+	  var re1 = /a/;
+	  var re2 = /b*/g;
+	  nativeExec.call(re1, 'a');
+	  nativeExec.call(re2, 'a');
+	  return re1.lastIndex !== 0 || re2.lastIndex !== 0;
+	})();
 
+	var UNSUPPORTED_Y$2 = stickyHelpers$2.UNSUPPORTED_Y || stickyHelpers$2.BROKEN_CARET;
 
+	// nonparticipating capturing group, copied from es5-shim's String#split patch.
+	var NPCG_INCLUDED = /()??/.exec('')[1] !== undefined;
 
+	var PATCH = UPDATES_LAST_INDEX_WRONG || NPCG_INCLUDED || UNSUPPORTED_Y$2 || UNSUPPORTED_DOT_ALL$1 || UNSUPPORTED_NCG$1;
 
+	if (PATCH) {
+	  // eslint-disable-next-line max-statements -- TODO
+	  patchedExec = function exec(str) {
+	    var re = this;
+	    var state = getInternalState(re);
+	    var raw = state.raw;
+	    var result, reCopy, lastIndex, match, i, object, group;
 
+	    if (raw) {
+	      raw.lastIndex = re.lastIndex;
+	      result = patchedExec.call(raw, str);
+	      re.lastIndex = raw.lastIndex;
+	      return result;
+	    }
 
+	    var groups = state.groups;
+	    var sticky = UNSUPPORTED_Y$2 && re.sticky;
+	    var flags = regexpFlags.call(re);
+	    var source = re.source;
+	    var charsAdded = 0;
+	    var strCopy = str;
 
-	if (!window.Set) {
-	    window.Set = es6Set;
-	}
-	if (!window.Map) {
-	    window.Map = es6Map;
-	}
-	if (!window.Promise) {
-	    window.Promise = polyfill$e;
-	    window.Promise._immediateFn = setAsap;
-	}
-	if (!Array.prototype.find) {
-	    array_prototype_find.shim();
-	}
-	if (!Array.prototype.findIndex) {
-	    array_prototype_findindex.shim();
-	}
-	if (!Array.from) {
-	    array_from.shim();
-	}
-	if (!Object.values) {
-	    object_values.shim();
-	}
-	if (!Object.assign) {
-	    object_assign.shim();
-	}
-	if (!window.requestAnimationFrame || !window.cancelAnimationFrame) {
-	    window.requestAnimationFrame = raf_1;
-	    window.cancelAnimationFrame = raf_1.cancel;
-	}
+	    if (sticky) {
+	      flags = flags.replace('y', '');
+	      if (flags.indexOf('g') === -1) {
+	        flags += 'g';
+	      }
 
-	var finalFetch = window.fetch;
-	var finalPromise = window.Promise;
-	window.fetch = function (input, init) {
-	    try {
-	        return finalFetch(input, init);
-	    }
-	    catch (error) {
-	        return new finalPromise(function (_, reject) { return reject(error); });
+	      strCopy = String(str).slice(re.lastIndex);
+	      // Support anchored sticky behavior.
+	      if (re.lastIndex > 0 && (!re.multiline || re.multiline && str[re.lastIndex - 1] !== '\n')) {
+	        source = '(?: ' + source + ')';
+	        strCopy = ' ' + strCopy;
+	        charsAdded++;
+	      }
+	      // ^(? + rx + ) is needed, in combination with some str slicing, to
+	      // simulate the 'y' flag.
+	      reCopy = new RegExp('^(?:' + source + ')', flags);
 	    }
-	};
-	});
-
-	var $Math$2 = GetIntrinsic('%Math%');
 
-	var $floor$1 = $Math$2.floor;
-	var $abs$1 = $Math$2.abs;
+	    if (NPCG_INCLUDED) {
+	      reCopy = new RegExp('^' + source + '$(?!\\s)', flags);
+	    }
+	    if (UPDATES_LAST_INDEX_WRONG) lastIndex = re.lastIndex;
 
+	    match = nativeExec.call(sticky ? reCopy : re, strCopy);
 
+	    if (sticky) {
+	      if (match) {
+	        match.input = match.input.slice(charsAdded);
+	        match[0] = match[0].slice(charsAdded);
+	        match.index = re.lastIndex;
+	        re.lastIndex += match[0].length;
+	      } else re.lastIndex = 0;
+	    } else if (UPDATES_LAST_INDEX_WRONG && match) {
+	      re.lastIndex = re.global ? match.index + match[0].length : lastIndex;
+	    }
+	    if (NPCG_INCLUDED && match && match.length > 1) {
+	      // Fix browsers whose `exec` methods don't consistently return `undefined`
+	      // for NPCG, like IE8. NOTE: This doesn' work for /(.?)?/
+	      nativeReplace.call(match[0], reCopy, function () {
+	        for (i = 1; i < arguments.length - 2; i++) {
+	          if (arguments[i] === undefined) match[i] = undefined;
+	        }
+	      });
+	    }
 
+	    if (match && groups) {
+	      match.groups = object = create$7(null);
+	      for (i = 0; i < groups.length; i++) {
+	        group = groups[i];
+	        object[group[0]] = match[group[1]];
+	      }
+	    }
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-isinteger
+	    return match;
+	  };
+	}
 
-	var IsInteger = function IsInteger(argument) {
-		if (typeof argument !== 'number' || _isNaN(argument) || !_isFinite(argument)) {
-			return false;
-		}
-		var abs = $abs$1(argument);
-		return $floor$1(abs) === abs;
-	};
+	var regexpExec$3 = patchedExec;
 
-	var ArrayPush = callBound('Array.prototype.push');
-	var StringFromCharCodeSpread = callBind.apply(String.fromCharCode, null);
-
-	var implementation$8 = function fromCodePoint(_ /* fromCodePoint.length is 1 */) {
-		var arguments$1 = arguments;
-
-		var MAX_SIZE = 0x4000;
-		var codeUnits = [];
-		var highSurrogate;
-		var lowSurrogate;
-		var index = -1;
-		var length = arguments.length;
-		if (!length) {
-			return '';
-		}
-		var result = '';
-		while (++index < length) {
-			var codePoint = ToNumber$1(arguments$1[index]);
-			if (
-				!IsInteger(codePoint) ||
-				codePoint < 0 || codePoint > 0x10FFFF // not a valid Unicode code point
-			) {
-				throw RangeError('Invalid code point: ' + codePoint);
-			}
-			if (codePoint <= 0xFFFF) { // BMP code point
-				ArrayPush(codeUnits, codePoint);
-			} else { // Astral code point; split in surrogate halves
-				// https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
-				codePoint -= 0x10000;
-				highSurrogate = (codePoint >> 10) + 0xD800;
-				lowSurrogate = (codePoint % 0x400) + 0xDC00;
-				ArrayPush(codeUnits, highSurrogate, lowSurrogate);
-			}
-			if (index + 1 == length || codeUnits.length > MAX_SIZE) {
-				result += StringFromCharCodeSpread(codeUnits);
-				codeUnits.length = 0;
-			}
-		}
-		return result;
-	};
+	var $$P = _export;
+	var exec = regexpExec$3;
 
-	var polyfill$g = function getPolyfill() {
-		return String.fromCodePoint || implementation$8;
-	};
+	// `RegExp.prototype.exec` method
+	// https://tc39.es/ecma262/#sec-regexp.prototype.exec
+	$$P({ target: 'RegExp', proto: true, forced: /./.exec !== exec }, {
+	  exec: exec
+	});
 
-	var shim$d = function shimFromCodePoint() {
-		var polyfill = polyfill$g();
+	// TODO: Remove from `core-js@4` since it's moved to entry points
 
-		if (String.fromCodePoint !== polyfill) {
-			defineProperties_1(String, { fromCodePoint: polyfill });
-		}
+	var redefine$4 = redefine$g.exports;
+	var regexpExec$2 = regexpExec$3;
+	var fails$m = fails$N;
+	var wellKnownSymbol$5 = wellKnownSymbol$s;
+	var createNonEnumerableProperty$1 = createNonEnumerableProperty$e;
 
-		return polyfill;
-	};
+	var SPECIES = wellKnownSymbol$5('species');
+	var RegExpPrototype$1 = RegExp.prototype;
 
-	/*! https://mths.be/fromcodepoint v1.0.0 by @mathias */
+	var fixRegexpWellKnownSymbolLogic = function (KEY, exec, FORCED, SHAM) {
+	  var SYMBOL = wellKnownSymbol$5(KEY);
 
-	shim$d();
+	  var DELEGATES_TO_SYMBOL = !fails$m(function () {
+	    // String methods call symbol-named RegEp methods
+	    var O = {};
+	    O[SYMBOL] = function () { return 7; };
+	    return ''[KEY](O) != 7;
+	  });
 
-	(function (factory) {
-	  
-	  factory();
-	}((function () {
-	  function _classCallCheck(instance, Constructor) {
-	    if (!(instance instanceof Constructor)) {
-	      throw new TypeError("Cannot call a class as a function");
-	    }
-	  }
+	  var DELEGATES_TO_EXEC = DELEGATES_TO_SYMBOL && !fails$m(function () {
+	    // Symbol-named RegExp methods call .exec
+	    var execCalled = false;
+	    var re = /a/;
 
-	  function _defineProperties(target, props) {
-	    for (var i = 0; i < props.length; i++) {
-	      var descriptor = props[i];
-	      descriptor.enumerable = descriptor.enumerable || false;
-	      descriptor.configurable = true;
-	      if ("value" in descriptor) { descriptor.writable = true; }
-	      Object.defineProperty(target, descriptor.key, descriptor);
+	    if (KEY === 'split') {
+	      // We can't use real regex here since it causes deoptimization
+	      // and serious performance degradation in V8
+	      // https://github.com/zloirock/core-js/issues/306
+	      re = {};
+	      // RegExp[@@split] doesn't call the regex's exec method, but first creates
+	      // a new one. We need to return the patched regex when creating the new one.
+	      re.constructor = {};
+	      re.constructor[SPECIES] = function () { return re; };
+	      re.flags = '';
+	      re[SYMBOL] = /./[SYMBOL];
 	    }
-	  }
 
-	  function _createClass(Constructor, protoProps, staticProps) {
-	    if (protoProps) { _defineProperties(Constructor.prototype, protoProps); }
-	    if (staticProps) { _defineProperties(Constructor, staticProps); }
-	    return Constructor;
-	  }
+	    re.exec = function () { execCalled = true; return null; };
 
-	  function _inherits(subClass, superClass) {
-	    if (typeof superClass !== "function" && superClass !== null) {
-	      throw new TypeError("Super expression must either be null or a function");
-	    }
+	    re[SYMBOL]('');
+	    return !execCalled;
+	  });
 
-	    subClass.prototype = Object.create(superClass && superClass.prototype, {
-	      constructor: {
-	        value: subClass,
-	        writable: true,
-	        configurable: true
+	  if (
+	    !DELEGATES_TO_SYMBOL ||
+	    !DELEGATES_TO_EXEC ||
+	    FORCED
+	  ) {
+	    var nativeRegExpMethod = /./[SYMBOL];
+	    var methods = exec(SYMBOL, ''[KEY], function (nativeMethod, regexp, str, arg2, forceStringMethod) {
+	      var $exec = regexp.exec;
+	      if ($exec === regexpExec$2 || $exec === RegExpPrototype$1.exec) {
+	        if (DELEGATES_TO_SYMBOL && !forceStringMethod) {
+	          // The native String method already delegates to @@method (this
+	          // polyfilled function), leasing to infinite recursion.
+	          // We avoid it by directly calling the native @@method method.
+	          return { done: true, value: nativeRegExpMethod.call(regexp, str, arg2) };
+	        }
+	        return { done: true, value: nativeMethod.call(str, regexp, arg2) };
 	      }
+	      return { done: false };
 	    });
-	    if (superClass) { _setPrototypeOf(subClass, superClass); }
-	  }
 
-	  function _getPrototypeOf(o) {
-	    _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {
-	      return o.__proto__ || Object.getPrototypeOf(o);
-	    };
-	    return _getPrototypeOf(o);
+	    redefine$4(String.prototype, KEY, methods[0]);
+	    redefine$4(RegExpPrototype$1, SYMBOL, methods[1]);
 	  }
 
-	  function _setPrototypeOf(o, p) {
-	    _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
-	      o.__proto__ = p;
-	      return o;
-	    };
+	  if (SHAM) createNonEnumerableProperty$1(RegExpPrototype$1[SYMBOL], 'sham', true);
+	};
 
-	    return _setPrototypeOf(o, p);
-	  }
+	var charAt = stringMultibyte.charAt;
 
-	  function _assertThisInitialized(self) {
-	    if (self === void 0) {
-	      throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
-	    }
+	// `AdvanceStringIndex` abstract operation
+	// https://tc39.es/ecma262/#sec-advancestringindex
+	var advanceStringIndex$3 = function (S, index, unicode) {
+	  return index + (unicode ? charAt(S, index).length : 1);
+	};
 
-	    return self;
-	  }
+	var toObject$6 = toObject$i;
 
-	  function _possibleConstructorReturn(self, call) {
-	    if (call && (typeof call === "object" || typeof call === "function")) {
-	      return call;
-	    }
+	var floor$1 = Math.floor;
+	var replace = ''.replace;
+	var SUBSTITUTION_SYMBOLS = /\$([$&'`]|\d{1,2}|<[^>]*>)/g;
+	var SUBSTITUTION_SYMBOLS_NO_NAMED = /\$([$&'`]|\d{1,2})/g;
 
-	    return _assertThisInitialized(self);
+	// `GetSubstitution` abstract operation
+	// https://tc39.es/ecma262/#sec-getsubstitution
+	var getSubstitution$1 = function (matched, str, position, captures, namedCaptures, replacement) {
+	  var tailPos = position + matched.length;
+	  var m = captures.length;
+	  var symbols = SUBSTITUTION_SYMBOLS_NO_NAMED;
+	  if (namedCaptures !== undefined) {
+	    namedCaptures = toObject$6(namedCaptures);
+	    symbols = SUBSTITUTION_SYMBOLS;
 	  }
+	  return replace.call(replacement, symbols, function (match, ch) {
+	    var capture;
+	    switch (ch.charAt(0)) {
+	      case '$': return '$';
+	      case '&': return matched;
+	      case '`': return str.slice(0, position);
+	      case "'": return str.slice(tailPos);
+	      case '<':
+	        capture = namedCaptures[ch.slice(1, -1)];
+	        break;
+	      default: // \d\d?
+	        var n = +ch;
+	        if (n === 0) return match;
+	        if (n > m) {
+	          var f = floor$1(n / 10);
+	          if (f === 0) return match;
+	          if (f <= m) return captures[f - 1] === undefined ? ch.charAt(1) : captures[f - 1] + ch.charAt(1);
+	          return match;
+	        }
+	        capture = captures[n - 1];
+	    }
+	    return capture === undefined ? '' : capture;
+	  });
+	};
 
-	  function _superPropBase(object, property) {
-	    while (!Object.prototype.hasOwnProperty.call(object, property)) {
-	      object = _getPrototypeOf(object);
-	      if (object === null) { break; }
+	var classof$3 = classofRaw$1;
+	var regexpExec$1 = regexpExec$3;
+
+	// `RegExpExec` abstract operation
+	// https://tc39.es/ecma262/#sec-regexpexec
+	var regexpExecAbstract = function (R, S) {
+	  var exec = R.exec;
+	  if (typeof exec === 'function') {
+	    var result = exec.call(R, S);
+	    if (typeof result !== 'object') {
+	      throw TypeError('RegExp exec method returned something other than an Object or null');
 	    }
+	    return result;
+	  }
 
-	    return object;
+	  if (classof$3(R) !== 'RegExp') {
+	    throw TypeError('RegExp#exec called on incompatible receiver');
 	  }
 
-	  function _get(target, property, receiver) {
-	    if (typeof Reflect !== "undefined" && Reflect.get) {
-	      _get = Reflect.get;
-	    } else {
-	      _get = function _get(target, property, receiver) {
-	        var base = _superPropBase(target, property);
+	  return regexpExec$1.call(R, S);
+	};
 
-	        if (!base) { return; }
-	        var desc = Object.getOwnPropertyDescriptor(base, property);
+	var fixRegExpWellKnownSymbolLogic$3 = fixRegexpWellKnownSymbolLogic;
+	var fails$l = fails$N;
+	var anObject$5 = anObject$m;
+	var toLength$8 = toLength$q;
+	var toInteger$3 = toInteger$b;
+	var requireObjectCoercible$a = requireObjectCoercible$e;
+	var advanceStringIndex$2 = advanceStringIndex$3;
+	var getSubstitution = getSubstitution$1;
+	var regExpExec$2 = regexpExecAbstract;
+	var wellKnownSymbol$4 = wellKnownSymbol$s;
 
-	        if (desc.get) {
-	          return desc.get.call(receiver);
-	        }
+	var REPLACE = wellKnownSymbol$4('replace');
+	var max$2 = Math.max;
+	var min$5 = Math.min;
 
-	        return desc.value;
-	      };
-	    }
+	var maybeToString = function (it) {
+	  return it === undefined ? it : String(it);
+	};
 
-	    return _get(target, property, receiver || target);
+	// IE <= 11 replaces $0 with the whole match, as if it was $&
+	// https://stackoverflow.com/questions/6024666/getting-ie-to-replace-a-regex-with-the-literal-string-0
+	var REPLACE_KEEPS_$0 = (function () {
+	  // eslint-disable-next-line regexp/prefer-escape-replacement-dollar-char -- required for testing
+	  return 'a'.replace(/./, '$0') === '$0';
+	})();
+
+	// Safari <= 13.0.3(?) substitutes nth capture where n>m with an empty string
+	var REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE = (function () {
+	  if (/./[REPLACE]) {
+	    return /./[REPLACE]('a', '$0') === '';
 	  }
+	  return false;
+	})();
 
-	  var Emitter =
-	  /*#__PURE__*/
-	  function () {
-	    function Emitter() {
-	      _classCallCheck(this, Emitter);
+	var REPLACE_SUPPORTS_NAMED_GROUPS = !fails$l(function () {
+	  var re = /./;
+	  re.exec = function () {
+	    var result = [];
+	    result.groups = { a: '7' };
+	    return result;
+	  };
+	  return ''.replace(re, '$<a>') !== '7';
+	});
 
-	      Object.defineProperty(this, 'listeners', {
-	        value: {},
-	        writable: true,
-	        configurable: true
-	      });
-	    }
+	// @@replace logic
+	fixRegExpWellKnownSymbolLogic$3('replace', function (_, nativeReplace, maybeCallNative) {
+	  var UNSAFE_SUBSTITUTE = REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE ? '$' : '$0';
 
-	    _createClass(Emitter, [{
-	      key: "addEventListener",
-	      value: function addEventListener(type, callback) {
-	        if (!(type in this.listeners)) {
-	          this.listeners[type] = [];
-	        }
+	  return [
+	    // `String.prototype.replace` method
+	    // https://tc39.es/ecma262/#sec-string.prototype.replace
+	    function replace(searchValue, replaceValue) {
+	      var O = requireObjectCoercible$a(this);
+	      var replacer = searchValue == undefined ? undefined : searchValue[REPLACE];
+	      return replacer !== undefined
+	        ? replacer.call(searchValue, O, replaceValue)
+	        : nativeReplace.call(String(O), searchValue, replaceValue);
+	    },
+	    // `RegExp.prototype[@@replace]` method
+	    // https://tc39.es/ecma262/#sec-regexp.prototype-@@replace
+	    function (string, replaceValue) {
+	      if (
+	        typeof replaceValue === 'string' &&
+	        replaceValue.indexOf(UNSAFE_SUBSTITUTE) === -1 &&
+	        replaceValue.indexOf('$<') === -1
+	      ) {
+	        var res = maybeCallNative(nativeReplace, this, string, replaceValue);
+	        if (res.done) return res.value;
+	      }
+
+	      var rx = anObject$5(this);
+	      var S = String(string);
+
+	      var functionalReplace = typeof replaceValue === 'function';
+	      if (!functionalReplace) replaceValue = String(replaceValue);
 
-	        this.listeners[type].push(callback);
+	      var global = rx.global;
+	      if (global) {
+	        var fullUnicode = rx.unicode;
+	        rx.lastIndex = 0;
 	      }
-	    }, {
-	      key: "removeEventListener",
-	      value: function removeEventListener(type, callback) {
-	        if (!(type in this.listeners)) {
-	          return;
-	        }
+	      var results = [];
+	      while (true) {
+	        var result = regExpExec$2(rx, S);
+	        if (result === null) break;
 
-	        var stack = this.listeners[type];
+	        results.push(result);
+	        if (!global) break;
 
-	        for (var i = 0, l = stack.length; i < l; i++) {
-	          if (stack[i] === callback) {
-	            stack.splice(i, 1);
-	            return;
-	          }
-	        }
+	        var matchStr = String(result[0]);
+	        if (matchStr === '') rx.lastIndex = advanceStringIndex$2(S, toLength$8(rx.lastIndex), fullUnicode);
 	      }
-	    }, {
-	      key: "dispatchEvent",
-	      value: function dispatchEvent(event) {
-	        var _this = this;
 
-	        if (!(event.type in this.listeners)) {
-	          return;
+	      var accumulatedResult = '';
+	      var nextSourcePosition = 0;
+	      for (var i = 0; i < results.length; i++) {
+	        result = results[i];
+
+	        var matched = String(result[0]);
+	        var position = max$2(min$5(toInteger$3(result.index), S.length), 0);
+	        var captures = [];
+	        // NOTE: This is equivalent to
+	        //   captures = result.slice(1).map(maybeToString)
+	        // but for some reason `nativeSlice.call(result, 1, result.length)` (called in
+	        // the slice polyfill when slicing native arrays) "doesn't work" in safari 9 and
+	        // causes a crash (https://pastebin.com/N21QzeQA) when trying to debug it.
+	        for (var j = 1; j < result.length; j++) captures.push(maybeToString(result[j]));
+	        var namedCaptures = result.groups;
+	        if (functionalReplace) {
+	          var replacerArgs = [matched].concat(captures, position, S);
+	          if (namedCaptures !== undefined) replacerArgs.push(namedCaptures);
+	          var replacement = String(replaceValue.apply(undefined, replacerArgs));
+	        } else {
+	          replacement = getSubstitution(matched, S, position, captures, namedCaptures, replaceValue);
 	        }
+	        if (position >= nextSourcePosition) {
+	          accumulatedResult += S.slice(nextSourcePosition, position) + replacement;
+	          nextSourcePosition = position + matched.length;
+	        }
+	      }
+	      return accumulatedResult + S.slice(nextSourcePosition);
+	    }
+	  ];
+	}, !REPLACE_SUPPORTS_NAMED_GROUPS || !REPLACE_KEEPS_$0 || REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE);
+
+	var isObject$b = isObject$r;
+	var classof$2 = classofRaw$1;
+	var wellKnownSymbol$3 = wellKnownSymbol$s;
+
+	var MATCH$2 = wellKnownSymbol$3('match');
+
+	// `IsRegExp` abstract operation
+	// https://tc39.es/ecma262/#sec-isregexp
+	var isRegexp = function (it) {
+	  var isRegExp;
+	  return isObject$b(it) && ((isRegExp = it[MATCH$2]) !== undefined ? !!isRegExp : classof$2(it) == 'RegExp');
+	};
+
+	var fixRegExpWellKnownSymbolLogic$2 = fixRegexpWellKnownSymbolLogic;
+	var isRegExp$2 = isRegexp;
+	var anObject$4 = anObject$m;
+	var requireObjectCoercible$9 = requireObjectCoercible$e;
+	var speciesConstructor$1 = speciesConstructor$8;
+	var advanceStringIndex$1 = advanceStringIndex$3;
+	var toLength$7 = toLength$q;
+	var callRegExpExec = regexpExecAbstract;
+	var regexpExec = regexpExec$3;
+	var stickyHelpers$1 = regexpStickyHelpers;
+	var fails$k = fails$N;
+
+	var UNSUPPORTED_Y$1 = stickyHelpers$1.UNSUPPORTED_Y;
+	var arrayPush = [].push;
+	var min$4 = Math.min;
+	var MAX_UINT32 = 0xFFFFFFFF;
+
+	// Chrome 51 has a buggy "split" implementation when RegExp#exec !== nativeExec
+	// Weex JS has frozen built-in prototypes, so use try / catch wrapper
+	var SPLIT_WORKS_WITH_OVERWRITTEN_EXEC = !fails$k(function () {
+	  // eslint-disable-next-line regexp/no-empty-group -- required for testing
+	  var re = /(?:)/;
+	  var originalExec = re.exec;
+	  re.exec = function () { return originalExec.apply(this, arguments); };
+	  var result = 'ab'.split(re);
+	  return result.length !== 2 || result[0] !== 'a' || result[1] !== 'b';
+	});
 
-	        var debounce = function debounce(callback) {
-	          setTimeout(function () {
-	            return callback.call(_this, event);
-	          });
-	        };
-
-	        var stack = this.listeners[event.type];
+	// @@split logic
+	fixRegExpWellKnownSymbolLogic$2('split', function (SPLIT, nativeSplit, maybeCallNative) {
+	  var internalSplit;
+	  if (
+	    'abbc'.split(/(b)*/)[1] == 'c' ||
+	    // eslint-disable-next-line regexp/no-empty-group -- required for testing
+	    'test'.split(/(?:)/, -1).length != 4 ||
+	    'ab'.split(/(?:ab)*/).length != 2 ||
+	    '.'.split(/(.?)(.?)/).length != 4 ||
+	    // eslint-disable-next-line regexp/no-assertion-capturing-group, regexp/no-empty-group -- required for testing
+	    '.'.split(/()()/).length > 1 ||
+	    ''.split(/.?/).length
+	  ) {
+	    // based on es5-shim implementation, need to rework it
+	    internalSplit = function (separator, limit) {
+	      var string = String(requireObjectCoercible$9(this));
+	      var lim = limit === undefined ? MAX_UINT32 : limit >>> 0;
+	      if (lim === 0) return [];
+	      if (separator === undefined) return [string];
+	      // If `separator` is not a regex, use native split
+	      if (!isRegExp$2(separator)) {
+	        return nativeSplit.call(string, separator, lim);
+	      }
+	      var output = [];
+	      var flags = (separator.ignoreCase ? 'i' : '') +
+	                  (separator.multiline ? 'm' : '') +
+	                  (separator.unicode ? 'u' : '') +
+	                  (separator.sticky ? 'y' : '');
+	      var lastLastIndex = 0;
+	      // Make `global` and avoid `lastIndex` issues by working with a copy
+	      var separatorCopy = new RegExp(separator.source, flags + 'g');
+	      var match, lastIndex, lastLength;
+	      while (match = regexpExec.call(separatorCopy, string)) {
+	        lastIndex = separatorCopy.lastIndex;
+	        if (lastIndex > lastLastIndex) {
+	          output.push(string.slice(lastLastIndex, match.index));
+	          if (match.length > 1 && match.index < string.length) arrayPush.apply(output, match.slice(1));
+	          lastLength = match[0].length;
+	          lastLastIndex = lastIndex;
+	          if (output.length >= lim) break;
+	        }
+	        if (separatorCopy.lastIndex === match.index) separatorCopy.lastIndex++; // Avoid an infinite loop
+	      }
+	      if (lastLastIndex === string.length) {
+	        if (lastLength || !separatorCopy.test('')) output.push('');
+	      } else output.push(string.slice(lastLastIndex));
+	      return output.length > lim ? output.slice(0, lim) : output;
+	    };
+	  // Chakra, V8
+	  } else if ('0'.split(undefined, 0).length) {
+	    internalSplit = function (separator, limit) {
+	      return separator === undefined && limit === 0 ? [] : nativeSplit.call(this, separator, limit);
+	    };
+	  } else internalSplit = nativeSplit;
 
-	        for (var i = 0, l = stack.length; i < l; i++) {
-	          debounce(stack[i]);
+	  return [
+	    // `String.prototype.split` method
+	    // https://tc39.es/ecma262/#sec-string.prototype.split
+	    function split(separator, limit) {
+	      var O = requireObjectCoercible$9(this);
+	      var splitter = separator == undefined ? undefined : separator[SPLIT];
+	      return splitter !== undefined
+	        ? splitter.call(separator, O, limit)
+	        : internalSplit.call(String(O), separator, limit);
+	    },
+	    // `RegExp.prototype[@@split]` method
+	    // https://tc39.es/ecma262/#sec-regexp.prototype-@@split
+	    //
+	    // NOTE: This cannot be properly polyfilled in engines that don't support
+	    // the 'y' flag.
+	    function (string, limit) {
+	      var res = maybeCallNative(internalSplit, this, string, limit, internalSplit !== nativeSplit);
+	      if (res.done) return res.value;
+
+	      var rx = anObject$4(this);
+	      var S = String(string);
+	      var C = speciesConstructor$1(rx, RegExp);
+
+	      var unicodeMatching = rx.unicode;
+	      var flags = (rx.ignoreCase ? 'i' : '') +
+	                  (rx.multiline ? 'm' : '') +
+	                  (rx.unicode ? 'u' : '') +
+	                  (UNSUPPORTED_Y$1 ? 'g' : 'y');
+
+	      // ^(? + rx + ) is needed, in combination with some S slicing, to
+	      // simulate the 'y' flag.
+	      var splitter = new C(UNSUPPORTED_Y$1 ? '^(?:' + rx.source + ')' : rx, flags);
+	      var lim = limit === undefined ? MAX_UINT32 : limit >>> 0;
+	      if (lim === 0) return [];
+	      if (S.length === 0) return callRegExpExec(splitter, S) === null ? [S] : [];
+	      var p = 0;
+	      var q = 0;
+	      var A = [];
+	      while (q < S.length) {
+	        splitter.lastIndex = UNSUPPORTED_Y$1 ? 0 : q;
+	        var z = callRegExpExec(splitter, UNSUPPORTED_Y$1 ? S.slice(q) : S);
+	        var e;
+	        if (
+	          z === null ||
+	          (e = min$4(toLength$7(splitter.lastIndex + (UNSUPPORTED_Y$1 ? q : 0)), S.length)) === p
+	        ) {
+	          q = advanceStringIndex$1(S, q, unicodeMatching);
+	        } else {
+	          A.push(S.slice(p, q));
+	          if (A.length === lim) return A;
+	          for (var i = 1; i <= z.length - 1; i++) {
+	            A.push(z[i]);
+	            if (A.length === lim) return A;
+	          }
+	          q = p = e;
 	        }
-
-	        return !event.defaultPrevented;
 	      }
-	    }]);
+	      A.push(S.slice(p));
+	      return A;
+	    }
+	  ];
+	}, !SPLIT_WORKS_WITH_OVERWRITTEN_EXEC, UNSUPPORTED_Y$1);
 
-	    return Emitter;
-	  }();
+	// a string of all valid unicode whitespaces
+	var whitespaces$4 = '\u0009\u000A\u000B\u000C\u000D\u0020\u00A0\u1680\u2000\u2001\u2002' +
+	  '\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028\u2029\uFEFF';
 
-	  var AbortSignal =
-	  /*#__PURE__*/
-	  function (_Emitter) {
-	    _inherits(AbortSignal, _Emitter);
+	var requireObjectCoercible$8 = requireObjectCoercible$e;
+	var whitespaces$3 = whitespaces$4;
 
-	    function AbortSignal() {
-	      var _this2;
+	var whitespace = '[' + whitespaces$3 + ']';
+	var ltrim = RegExp('^' + whitespace + whitespace + '*');
+	var rtrim$2 = RegExp(whitespace + whitespace + '*$');
 
-	      _classCallCheck(this, AbortSignal);
+	// `String.prototype.{ trim, trimStart, trimEnd, trimLeft, trimRight }` methods implementation
+	var createMethod$2 = function (TYPE) {
+	  return function ($this) {
+	    var string = String(requireObjectCoercible$8($this));
+	    if (TYPE & 1) string = string.replace(ltrim, '');
+	    if (TYPE & 2) string = string.replace(rtrim$2, '');
+	    return string;
+	  };
+	};
 
-	      _this2 = _possibleConstructorReturn(this, _getPrototypeOf(AbortSignal).call(this)); // Some versions of babel does not transpile super() correctly for IE <= 10, if the parent
-	      // constructor has failed to run, then "this.listeners" will still be undefined and then we call
-	      // the parent constructor directly instead as a workaround. For general details, see babel bug:
-	      // https://github.com/babel/babel/issues/3041
-	      // This hack was added as a fix for the issue described here:
-	      // https://github.com/Financial-Times/polyfill-library/pull/59#issuecomment-477558042
+	var stringTrim = {
+	  // `String.prototype.{ trimLeft, trimStart }` methods
+	  // https://tc39.es/ecma262/#sec-string.prototype.trimstart
+	  start: createMethod$2(1),
+	  // `String.prototype.{ trimRight, trimEnd }` methods
+	  // https://tc39.es/ecma262/#sec-string.prototype.trimend
+	  end: createMethod$2(2),
+	  // `String.prototype.trim` method
+	  // https://tc39.es/ecma262/#sec-string.prototype.trim
+	  trim: createMethod$2(3)
+	};
 
-	      if (!_this2.listeners) {
-	        Emitter.call(_assertThisInitialized(_this2));
-	      } // Compared to assignment, Object.defineProperty makes properties non-enumerable by default and
-	      // we want Object.keys(new AbortController().signal) to be [] for compat with the native impl
+	var fails$j = fails$N;
+	var whitespaces$2 = whitespaces$4;
 
+	var non = '\u200B\u0085\u180E';
 
-	      Object.defineProperty(_assertThisInitialized(_this2), 'aborted', {
-	        value: false,
-	        writable: true,
-	        configurable: true
-	      });
-	      Object.defineProperty(_assertThisInitialized(_this2), 'onabort', {
-	        value: null,
-	        writable: true,
-	        configurable: true
-	      });
-	      return _this2;
-	    }
+	// check that a method works with the correct list
+	// of whitespaces and has a correct name
+	var stringTrimForced = function (METHOD_NAME) {
+	  return fails$j(function () {
+	    return !!whitespaces$2[METHOD_NAME]() || non[METHOD_NAME]() != non || whitespaces$2[METHOD_NAME].name !== METHOD_NAME;
+	  });
+	};
 
-	    _createClass(AbortSignal, [{
-	      key: "toString",
-	      value: function toString() {
-	        return '[object AbortSignal]';
-	      }
-	    }, {
-	      key: "dispatchEvent",
-	      value: function dispatchEvent(event) {
-	        if (event.type === 'abort') {
-	          this.aborted = true;
+	var $$O = _export;
+	var $trim = stringTrim.trim;
+	var forcedStringTrimMethod = stringTrimForced;
 
-	          if (typeof this.onabort === 'function') {
-	            this.onabort.call(this, event);
-	          }
-	        }
+	// `String.prototype.trim` method
+	// https://tc39.es/ecma262/#sec-string.prototype.trim
+	$$O({ target: 'String', proto: true, forced: forcedStringTrimMethod('trim') }, {
+	  trim: function trim() {
+	    return $trim(this);
+	  }
+	});
 
-	        _get(_getPrototypeOf(AbortSignal.prototype), "dispatchEvent", this).call(this, event);
-	      }
-	    }]);
+	var DESCRIPTORS$9 = descriptors;
+	var defineProperty$4 = objectDefineProperty.f;
 
-	    return AbortSignal;
-	  }(Emitter);
-	  var AbortController =
-	  /*#__PURE__*/
-	  function () {
-	    function AbortController() {
-	      _classCallCheck(this, AbortController);
+	var FunctionPrototype = Function.prototype;
+	var FunctionPrototypeToString = FunctionPrototype.toString;
+	var nameRE = /^\s*function ([^ (]*)/;
+	var NAME = 'name';
 
-	      // Compared to assignment, Object.defineProperty makes properties non-enumerable by default and
-	      // we want Object.keys(new AbortController()) to be [] for compat with the native impl
-	      Object.defineProperty(this, 'signal', {
-	        value: new AbortSignal(),
-	        writable: true,
-	        configurable: true
-	      });
+	// Function instances `.name` property
+	// https://tc39.es/ecma262/#sec-function-instances-name
+	if (DESCRIPTORS$9 && !(NAME in FunctionPrototype)) {
+	  defineProperty$4(FunctionPrototype, NAME, {
+	    configurable: true,
+	    get: function () {
+	      try {
+	        return FunctionPrototypeToString.call(this).match(nameRE)[1];
+	      } catch (error) {
+	        return '';
+	      }
 	    }
+	  });
+	}
 
-	    _createClass(AbortController, [{
-	      key: "abort",
-	      value: function abort() {
-	        var event;
+	var $$N = _export;
+	var DESCRIPTORS$8 = descriptors;
+	var create$6 = objectCreate;
 
-	        try {
-	          event = new Event('abort');
-	        } catch (e) {
-	          if (typeof document !== 'undefined') {
-	            if (!document.createEvent) {
-	              // For Internet Explorer 8:
-	              event = document.createEventObject();
-	              event.type = 'abort';
-	            } else {
-	              // For Internet Explorer 11:
-	              event = document.createEvent('Event');
-	              event.initEvent('abort', false, false);
-	            }
-	          } else {
-	            // Fallback where document isn't available:
-	            event = {
-	              type: 'abort',
-	              bubbles: false,
-	              cancelable: false
-	            };
-	          }
-	        }
+	// `Object.create` method
+	// https://tc39.es/ecma262/#sec-object.create
+	$$N({ target: 'Object', stat: true, sham: !DESCRIPTORS$8 }, {
+	  create: create$6
+	});
 
-	        this.signal.dispatchEvent(event);
-	      }
-	    }, {
-	      key: "toString",
-	      value: function toString() {
-	        return '[object AbortController]';
-	      }
-	    }]);
+	var $$M = _export;
+	var global$9 = global$F;
+	var userAgent = engineUserAgent;
+
+	var slice$3 = [].slice;
+	var MSIE = /MSIE .\./.test(userAgent); // <- dirty ie9- check
+
+	var wrap$1 = function (scheduler) {
+	  return function (handler, timeout /* , ...arguments */) {
+	    var boundArgs = arguments.length > 2;
+	    var args = boundArgs ? slice$3.call(arguments, 2) : undefined;
+	    return scheduler(boundArgs ? function () {
+	      // eslint-disable-next-line no-new-func -- spec requirement
+	      (typeof handler == 'function' ? handler : Function(handler)).apply(this, args);
+	    } : handler, timeout);
+	  };
+	};
+
+	// ie9- setTimeout & setInterval additional parameters fix
+	// https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#timers
+	$$M({ global: true, bind: true, forced: MSIE }, {
+	  // `setTimeout` method
+	  // https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-settimeout
+	  setTimeout: wrap$1(global$9.setTimeout),
+	  // `setInterval` method
+	  // https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-setinterval
+	  setInterval: wrap$1(global$9.setInterval)
+	});
 
-	    return AbortController;
-	  }();
+	var global$8 = typeof globalThis !== 'undefined' && globalThis || typeof self !== 'undefined' && self || typeof global$8 !== 'undefined' && global$8;
+	var support = {
+	  searchParams: 'URLSearchParams' in global$8,
+	  iterable: 'Symbol' in global$8 && 'iterator' in Symbol,
+	  blob: 'FileReader' in global$8 && 'Blob' in global$8 && function () {
+	    try {
+	      new Blob();
+	      return true;
+	    } catch (e) {
+	      return false;
+	    }
+	  }(),
+	  formData: 'FormData' in global$8,
+	  arrayBuffer: 'ArrayBuffer' in global$8
+	};
 
-	  if (typeof Symbol !== 'undefined' && Symbol.toStringTag) {
-	    // These are necessary to make sure that we get correct output for:
-	    // Object.prototype.toString.call(new AbortController())
-	    AbortController.prototype[Symbol.toStringTag] = 'AbortController';
-	    AbortSignal.prototype[Symbol.toStringTag] = 'AbortSignal';
-	  }
+	function isDataView(obj) {
+	  return obj && DataView.prototype.isPrototypeOf(obj);
+	}
 
-	  function polyfillNeeded(self) {
-	    if (self.__FORCE_INSTALL_ABORTCONTROLLER_POLYFILL) {
-	      console.log('__FORCE_INSTALL_ABORTCONTROLLER_POLYFILL=true is set, will force install polyfill');
-	      return true;
-	    } // Note that the "unfetch" minimal fetch polyfill defines fetch() without
-	    // defining window.Request, and this polyfill need to work on top of unfetch
-	    // so the below feature detection needs the !self.AbortController part.
-	    // The Request.prototype check is also needed because Safari versions 11.1.2
-	    // up to and including 12.1.x has a window.AbortController present but still
-	    // does NOT correctly implement abortable fetch:
-	    // https://bugs.webkit.org/show_bug.cgi?id=174980#c2
+	if (support.arrayBuffer) {
+	  var viewClasses = ['[object Int8Array]', '[object Uint8Array]', '[object Uint8ClampedArray]', '[object Int16Array]', '[object Uint16Array]', '[object Int32Array]', '[object Uint32Array]', '[object Float32Array]', '[object Float64Array]'];
 
+	  var isArrayBufferView = ArrayBuffer.isView || function (obj) {
+	    return obj && viewClasses.indexOf(Object.prototype.toString.call(obj)) > -1;
+	  };
+	}
 
-	    return typeof self.Request === 'function' && !self.Request.prototype.hasOwnProperty('signal') || !self.AbortController;
+	function normalizeName(name) {
+	  if (typeof name !== 'string') {
+	    name = String(name);
 	  }
 
-	  /**
-	   * Note: the "fetch.Request" default value is available for fetch imported from
-	   * the "node-fetch" package and not in browsers. This is OK since browsers
-	   * will be importing umd-polyfill.js from that path "self" is passed the
-	   * decorator so the default value will not be used (because browsers that define
-	   * fetch also has Request). One quirky setup where self.fetch exists but
-	   * self.Request does not is when the "unfetch" minimal fetch polyfill is used
-	   * on top of IE11; for this case the browser will try to use the fetch.Request
-	   * default value which in turn will be undefined but then then "if (Request)"
-	   * will ensure that you get a patched fetch but still no Request (as expected).
-	   * @param {fetch, Request = fetch.Request}
-	   * @returns {fetch: abortableFetch, Request: AbortableRequest}
-	   */
+	  if (/[^a-z0-9\-#$%&'*+.^_`|~!]/i.test(name) || name === '') {
+	    throw new TypeError('Invalid character in header field name: "' + name + '"');
+	  }
 
-	  function abortableFetchDecorator(patchTargets) {
-	    if ('function' === typeof patchTargets) {
-	      patchTargets = {
-	        fetch: patchTargets
-	      };
-	    }
+	  return name.toLowerCase();
+	}
 
-	    var _patchTargets = patchTargets,
-	        fetch = _patchTargets.fetch,
-	        _patchTargets$Request = _patchTargets.Request,
-	        NativeRequest = _patchTargets$Request === void 0 ? fetch.Request : _patchTargets$Request,
-	        NativeAbortController = _patchTargets.AbortController,
-	        _patchTargets$__FORCE = _patchTargets.__FORCE_INSTALL_ABORTCONTROLLER_POLYFILL,
-	        __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL = _patchTargets$__FORCE === void 0 ? false : _patchTargets$__FORCE;
+	function normalizeValue(value) {
+	  if (typeof value !== 'string') {
+	    value = String(value);
+	  }
 
-	    if (!polyfillNeeded({
-	      fetch: fetch,
-	      Request: NativeRequest,
-	      AbortController: NativeAbortController,
-	      __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL: __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL
-	    })) {
+	  return value;
+	} // Build a destructive iterator for the value list
+
+
+	function iteratorFor(items) {
+	  var iterator = {
+	    next: function next() {
+	      var value = items.shift();
 	      return {
-	        fetch: fetch,
-	        Request: Request
+	        done: value === undefined,
+	        value: value
 	      };
 	    }
+	  };
 
-	    var Request = NativeRequest; // Note that the "unfetch" minimal fetch polyfill defines fetch() without
-	    // defining window.Request, and this polyfill need to work on top of unfetch
-	    // hence we only patch it if it's available. Also we don't patch it if signal
-	    // is already available on the Request prototype because in this case support
-	    // is present and the patching below can cause a crash since it assigns to
-	    // request.signal which is technically a read-only property. This latter error
-	    // happens when you run the main5.js node-fetch example in the repo
-	    // "abortcontroller-polyfill-examples". The exact error is:
-	    //   request.signal = init.signal;
-	    //   ^
-	    // TypeError: Cannot set property signal of #<Request> which has only a getter
+	  if (support.iterable) {
+	    iterator[Symbol.iterator] = function () {
+	      return iterator;
+	    };
+	  }
 
-	    if (Request && !Request.prototype.hasOwnProperty('signal') || __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL) {
-	      Request = function Request(input, init) {
-	        var signal;
+	  return iterator;
+	}
 
-	        if (init && init.signal) {
-	          signal = init.signal; // Never pass init.signal to the native Request implementation when the polyfill has
-	          // been installed because if we're running on top of a browser with a
-	          // working native AbortController (i.e. the polyfill was installed due to
-	          // __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL being set), then passing our
-	          // fake AbortSignal to the native fetch will trigger:
-	          // TypeError: Failed to construct 'Request': member signal is not of type AbortSignal.
+	function Headers(headers) {
+	  this.map = {};
 
-	          delete init.signal;
-	        }
+	  if (headers instanceof Headers) {
+	    headers.forEach(function (value, name) {
+	      this.append(name, value);
+	    }, this);
+	  } else if (Array.isArray(headers)) {
+	    headers.forEach(function (header) {
+	      this.append(header[0], header[1]);
+	    }, this);
+	  } else if (headers) {
+	    Object.getOwnPropertyNames(headers).forEach(function (name) {
+	      this.append(name, headers[name]);
+	    }, this);
+	  }
+	}
 
-	        var request = new NativeRequest(input, init);
+	Headers.prototype.append = function (name, value) {
+	  name = normalizeName(name);
+	  value = normalizeValue(value);
+	  var oldValue = this.map[name];
+	  this.map[name] = oldValue ? oldValue + ', ' + value : value;
+	};
 
-	        if (signal) {
-	          Object.defineProperty(request, 'signal', {
-	            writable: false,
-	            enumerable: false,
-	            configurable: true,
-	            value: signal
-	          });
-	        }
+	Headers.prototype['delete'] = function (name) {
+	  delete this.map[normalizeName(name)];
+	};
 
-	        return request;
-	      };
+	Headers.prototype.get = function (name) {
+	  name = normalizeName(name);
+	  return this.has(name) ? this.map[name] : null;
+	};
 
-	      Request.prototype = NativeRequest.prototype;
+	Headers.prototype.has = function (name) {
+	  return this.map.hasOwnProperty(normalizeName(name));
+	};
+
+	Headers.prototype.set = function (name, value) {
+	  this.map[normalizeName(name)] = normalizeValue(value);
+	};
+
+	Headers.prototype.forEach = function (callback, thisArg) {
+	  for (var name in this.map) {
+	    if (this.map.hasOwnProperty(name)) {
+	      callback.call(thisArg, this.map[name], name, this);
 	    }
+	  }
+	};
 
-	    var realFetch = fetch;
+	Headers.prototype.keys = function () {
+	  var items = [];
+	  this.forEach(function (value, name) {
+	    items.push(name);
+	  });
+	  return iteratorFor(items);
+	};
 
-	    var abortableFetch = function abortableFetch(input, init) {
-	      var signal = Request && Request.prototype.isPrototypeOf(input) ? input.signal : init ? init.signal : undefined;
+	Headers.prototype.values = function () {
+	  var items = [];
+	  this.forEach(function (value) {
+	    items.push(value);
+	  });
+	  return iteratorFor(items);
+	};
 
-	      if (signal) {
-	        var abortError;
+	Headers.prototype.entries = function () {
+	  var items = [];
+	  this.forEach(function (value, name) {
+	    items.push([name, value]);
+	  });
+	  return iteratorFor(items);
+	};
 
-	        try {
-	          abortError = new DOMException('Aborted', 'AbortError');
-	        } catch (err) {
-	          // IE 11 does not support calling the DOMException constructor, use a
-	          // regular error object on it instead.
-	          abortError = new Error('Aborted');
-	          abortError.name = 'AbortError';
-	        } // Return early if already aborted, thus avoiding making an HTTP request
+	if (support.iterable) {
+	  Headers.prototype[Symbol.iterator] = Headers.prototype.entries;
+	}
 
+	function consumed(body) {
+	  if (body.bodyUsed) {
+	    return Promise.reject(new TypeError('Already read'));
+	  }
 
-	        if (signal.aborted) {
-	          return Promise.reject(abortError);
-	        } // Turn an event into a promise, reject it once `abort` is dispatched
+	  body.bodyUsed = true;
+	}
 
+	function fileReaderReady(reader) {
+	  return new Promise(function (resolve, reject) {
+	    reader.onload = function () {
+	      resolve(reader.result);
+	    };
 
-	        var cancellation = new Promise(function (_, reject) {
-	          signal.addEventListener('abort', function () {
-	            return reject(abortError);
-	          }, {
-	            once: true
-	          });
-	        });
+	    reader.onerror = function () {
+	      reject(reader.error);
+	    };
+	  });
+	}
 
-	        if (init && init.signal) {
-	          // Never pass .signal to the native implementation when the polyfill has
-	          // been installed because if we're running on top of a browser with a
-	          // working native AbortController (i.e. the polyfill was installed due to
-	          // __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL being set), then passing our
-	          // fake AbortSignal to the native fetch will trigger:
-	          // TypeError: Failed to execute 'fetch' on 'Window': member signal is not of type AbortSignal.
-	          delete init.signal;
-	        } // Return the fastest promise (don't need to wait for request to finish)
+	function readBlobAsArrayBuffer(blob) {
+	  var reader = new FileReader();
+	  var promise = fileReaderReady(reader);
+	  reader.readAsArrayBuffer(blob);
+	  return promise;
+	}
 
+	function readBlobAsText(blob) {
+	  var reader = new FileReader();
+	  var promise = fileReaderReady(reader);
+	  reader.readAsText(blob);
+	  return promise;
+	}
 
-	        return Promise.race([cancellation, realFetch(input, init)]);
-	      }
+	function readArrayBufferAsText(buf) {
+	  var view = new Uint8Array(buf);
+	  var chars = new Array(view.length);
 
-	      return realFetch(input, init);
-	    };
+	  for (var i = 0; i < view.length; i++) {
+	    chars[i] = String.fromCharCode(view[i]);
+	  }
 
-	    return {
-	      fetch: abortableFetch,
-	      Request: Request
-	    };
+	  return chars.join('');
+	}
+
+	function bufferClone(buf) {
+	  if (buf.slice) {
+	    return buf.slice(0);
+	  } else {
+	    var view = new Uint8Array(buf.byteLength);
+	    view.set(new Uint8Array(buf));
+	    return view.buffer;
 	  }
+	}
 
-	  (function (self) {
+	function Body() {
+	  this.bodyUsed = false;
 
-	    if (!polyfillNeeded(self)) {
-	      return;
-	    }
+	  this._initBody = function (body) {
+	    /*
+	      fetch-mock wraps the Response object in an ES6 Proxy to
+	      provide useful test harness features such as flush. However, on
+	      ES5 browsers without fetch or Proxy support pollyfills must be used;
+	      the proxy-pollyfill is unable to proxy an attribute unless it exists
+	      on the object before the Proxy is created. This change ensures
+	      Response.bodyUsed exists on the instance, while maintaining the
+	      semantic of setting Request.bodyUsed in the constructor before
+	      _initBody is called.
+	    */
+	    this.bodyUsed = this.bodyUsed;
+	    this._bodyInit = body;
 
-	    if (!self.fetch) {
-	      console.warn('fetch() is not available, cannot install abortcontroller-polyfill');
-	      return;
+	    if (!body) {
+	      this._bodyText = '';
+	    } else if (typeof body === 'string') {
+	      this._bodyText = body;
+	    } else if (support.blob && Blob.prototype.isPrototypeOf(body)) {
+	      this._bodyBlob = body;
+	    } else if (support.formData && FormData.prototype.isPrototypeOf(body)) {
+	      this._bodyFormData = body;
+	    } else if (support.searchParams && URLSearchParams.prototype.isPrototypeOf(body)) {
+	      this._bodyText = body.toString();
+	    } else if (support.arrayBuffer && support.blob && isDataView(body)) {
+	      this._bodyArrayBuffer = bufferClone(body.buffer); // IE 10-11 can't handle a DataView body.
+
+	      this._bodyInit = new Blob([this._bodyArrayBuffer]);
+	    } else if (support.arrayBuffer && (ArrayBuffer.prototype.isPrototypeOf(body) || isArrayBufferView(body))) {
+	      this._bodyArrayBuffer = bufferClone(body);
+	    } else {
+	      this._bodyText = body = Object.prototype.toString.call(body);
 	    }
 
-	    var _abortableFetch = abortableFetchDecorator(self),
-	        fetch = _abortableFetch.fetch,
-	        Request = _abortableFetch.Request;
+	    if (!this.headers.get('content-type')) {
+	      if (typeof body === 'string') {
+	        this.headers.set('content-type', 'text/plain;charset=UTF-8');
+	      } else if (this._bodyBlob && this._bodyBlob.type) {
+	        this.headers.set('content-type', this._bodyBlob.type);
+	      } else if (support.searchParams && URLSearchParams.prototype.isPrototypeOf(body)) {
+	        this.headers.set('content-type', 'application/x-www-form-urlencoded;charset=UTF-8');
+	      }
+	    }
+	  };
 
-	    self.fetch = fetch;
-	    self.Request = Request;
-	    Object.defineProperty(self, 'AbortController', {
-	      writable: true,
-	      enumerable: false,
-	      configurable: true,
-	      value: AbortController
-	    });
-	    Object.defineProperty(self, 'AbortSignal', {
-	      writable: true,
-	      enumerable: false,
-	      configurable: true,
-	      value: AbortSignal
-	    });
-	  })(typeof self !== 'undefined' ? self : commonjsGlobal);
+	  if (support.blob) {
+	    this.blob = function () {
+	      var rejected = consumed(this);
 
-	})));
+	      if (rejected) {
+	        return rejected;
+	      }
 
-	function actionAddEntity(way) {
-	    return function(graph) {
-	        return graph.replace(way);
+	      if (this._bodyBlob) {
+	        return Promise.resolve(this._bodyBlob);
+	      } else if (this._bodyArrayBuffer) {
+	        return Promise.resolve(new Blob([this._bodyArrayBuffer]));
+	      } else if (this._bodyFormData) {
+	        throw new Error('could not read FormData body as blob');
+	      } else {
+	        return Promise.resolve(new Blob([this._bodyText]));
+	      }
 	    };
-	}
-
-	/*
-	Order the nodes of a way in reverse order and reverse any direction dependent tags
-	other than `oneway`. (We assume that correcting a backwards oneway is the primary
-	reason for reversing a way.)
-
-	In addition, numeric-valued `incline` tags are negated.
 
-	The JOSM implementation was used as a guide, but transformations that were of unclear benefit
-	or adjusted tags that don't seem to be used in practice were omitted.
+	    this.arrayBuffer = function () {
+	      if (this._bodyArrayBuffer) {
+	        var isConsumed = consumed(this);
 
-	References:
-	    http://wiki.openstreetmap.org/wiki/Forward_%26_backward,_left_%26_right
-	    http://wiki.openstreetmap.org/wiki/Key:direction#Steps
-	    http://wiki.openstreetmap.org/wiki/Key:incline
-	    http://wiki.openstreetmap.org/wiki/Route#Members
-	    http://josm.openstreetmap.de/browser/josm/trunk/src/org/openstreetmap/josm/corrector/ReverseWayTagCorrector.java
-	    http://wiki.openstreetmap.org/wiki/Tag:highway%3Dstop
-	    http://wiki.openstreetmap.org/wiki/Key:traffic_sign#On_a_way_or_area
-	*/
-	function actionReverse(entityID, options) {
-	    var ignoreKey = /^.*(_|:)?(description|name|note|website|ref|source|comment|watch|attribution)(_|:)?/;
-	    var numeric = /^([+\-]?)(?=[\d.])/;
-	    var directionKey = /direction$/;
-	    var turn_lanes = /^turn:lanes:?/;
-	    var keyReplacements = [
-	        [/:right$/, ':left'],
-	        [/:left$/, ':right'],
-	        [/:forward$/, ':backward'],
-	        [/:backward$/, ':forward'],
-	        [/:right:/, ':left:'],
-	        [/:left:/, ':right:'],
-	        [/:forward:/, ':backward:'],
-	        [/:backward:/, ':forward:']
-	    ];
-	    var valueReplacements = {
-	        left: 'right',
-	        right: 'left',
-	        up: 'down',
-	        down: 'up',
-	        forward: 'backward',
-	        backward: 'forward',
-	        forwards: 'backward',
-	        backwards: 'forward',
-	    };
-	    var roleReplacements = {
-	        forward: 'backward',
-	        backward: 'forward',
-	        forwards: 'backward',
-	        backwards: 'forward'
-	    };
-	    var onewayReplacements = {
-	        yes: '-1',
-	        '1': '-1',
-	        '-1': 'yes'
-	    };
+	        if (isConsumed) {
+	          return isConsumed;
+	        }
 
-	    var compassReplacements = {
-	        N: 'S',
-	        NNE: 'SSW',
-	        NE: 'SW',
-	        ENE: 'WSW',
-	        E: 'W',
-	        ESE: 'WNW',
-	        SE: 'NW',
-	        SSE: 'NNW',
-	        S: 'N',
-	        SSW: 'NNE',
-	        SW: 'NE',
-	        WSW: 'ENE',
-	        W: 'E',
-	        WNW: 'ESE',
-	        NW: 'SE',
-	        NNW: 'SSE'
+	        if (ArrayBuffer.isView(this._bodyArrayBuffer)) {
+	          return Promise.resolve(this._bodyArrayBuffer.buffer.slice(this._bodyArrayBuffer.byteOffset, this._bodyArrayBuffer.byteOffset + this._bodyArrayBuffer.byteLength));
+	        } else {
+	          return Promise.resolve(this._bodyArrayBuffer);
+	        }
+	      } else {
+	        return this.blob().then(readBlobAsArrayBuffer);
+	      }
 	    };
+	  }
 
+	  this.text = function () {
+	    var rejected = consumed(this);
 
-	    function reverseKey(key) {
-	        for (var i = 0; i < keyReplacements.length; ++i) {
-	            var replacement = keyReplacements[i];
-	            if (replacement[0].test(key)) {
-	                return key.replace(replacement[0], replacement[1]);
-	            }
-	        }
-	        return key;
+	    if (rejected) {
+	      return rejected;
 	    }
 
+	    if (this._bodyBlob) {
+	      return readBlobAsText(this._bodyBlob);
+	    } else if (this._bodyArrayBuffer) {
+	      return Promise.resolve(readArrayBufferAsText(this._bodyArrayBuffer));
+	    } else if (this._bodyFormData) {
+	      throw new Error('could not read FormData body as text');
+	    } else {
+	      return Promise.resolve(this._bodyText);
+	    }
+	  };
 
-	    function reverseValue(key, value, includeAbsolute) {
-	        if (ignoreKey.test(key)) { return value; }
-
-	        // Turn lanes are left/right to key (not way) direction - #5674
-	        if (turn_lanes.test(key)) {
-	            return value;
+	  if (support.formData) {
+	    this.formData = function () {
+	      return this.text().then(decode);
+	    };
+	  }
 
-	        } else if (key === 'incline' && numeric.test(value)) {
-	            return value.replace(numeric, function(_, sign) { return sign === '-' ? '' : '-'; });
+	  this.json = function () {
+	    return this.text().then(JSON.parse);
+	  };
 
-	        } else if (options && options.reverseOneway && key === 'oneway') {
-	            return onewayReplacements[value] || value;
+	  return this;
+	} // HTTP methods whose capitalization should be normalized
 
-	        } else if (includeAbsolute && directionKey.test(key)) {
-	            if (compassReplacements[value]) { return compassReplacements[value]; }
 
-	            var degrees = parseFloat(value);
-	            if (typeof degrees === 'number' && !isNaN(degrees)) {
-	                if (degrees < 180) {
-	                    degrees += 180;
-	                } else {
-	                    degrees -= 180;
-	                }
-	                return degrees.toString();
-	            }
-	        }
+	var methods = ['DELETE', 'GET', 'HEAD', 'OPTIONS', 'POST', 'PUT'];
 
-	        return valueReplacements[value] || value;
-	    }
+	function normalizeMethod(method) {
+	  var upcased = method.toUpperCase();
+	  return methods.indexOf(upcased) > -1 ? upcased : method;
+	}
 
+	function Request(input, options) {
+	  if (!(this instanceof Request)) {
+	    throw new TypeError('Please use the "new" operator, this DOM object constructor cannot be called as a function.');
+	  }
 
-	    // Reverse the direction of tags attached to the nodes - #3076
-	    function reverseNodeTags(graph, nodeIDs) {
-	        for (var i = 0; i < nodeIDs.length; i++) {
-	            var node = graph.hasEntity(nodeIDs[i]);
-	            if (!node || !Object.keys(node.tags).length) { continue; }
+	  options = options || {};
+	  var body = options.body;
 
-	            var tags = {};
-	            for (var key in node.tags) {
-	                tags[reverseKey(key)] = reverseValue(key, node.tags[key], node.id === entityID);
-	            }
-	            graph = graph.replace(node.update({tags: tags}));
-	        }
-	        return graph;
+	  if (input instanceof Request) {
+	    if (input.bodyUsed) {
+	      throw new TypeError('Already read');
 	    }
 
+	    this.url = input.url;
+	    this.credentials = input.credentials;
 
-	    function reverseWay(graph, way) {
-	        var nodes = way.nodes.slice().reverse();
-	        var tags = {};
-	        var role;
-
-	        for (var key in way.tags) {
-	            tags[reverseKey(key)] = reverseValue(key, way.tags[key]);
-	        }
+	    if (!options.headers) {
+	      this.headers = new Headers(input.headers);
+	    }
 
-	        graph.parentRelations(way).forEach(function(relation) {
-	            relation.members.forEach(function(member, index) {
-	                if (member.id === way.id && (role = roleReplacements[member.role])) {
-	                    relation = relation.updateMember({role: role}, index);
-	                    graph = graph.replace(relation);
-	                }
-	            });
-	        });
+	    this.method = input.method;
+	    this.mode = input.mode;
+	    this.signal = input.signal;
 
-	        // Reverse any associated directions on nodes on the way and then replace
-	        // the way itself with the reversed node ids and updated way tags
-	        return reverseNodeTags(graph, nodes)
-	            .replace(way.update({nodes: nodes, tags: tags}));
+	    if (!body && input._bodyInit != null) {
+	      body = input._bodyInit;
+	      input.bodyUsed = true;
 	    }
+	  } else {
+	    this.url = String(input);
+	  }
 
+	  this.credentials = options.credentials || this.credentials || 'same-origin';
 
-	    var action = function(graph) {
-	        var entity = graph.entity(entityID);
-	        if (entity.type === 'way') {
-	            return reverseWay(graph, entity);
-	        }
-	        return reverseNodeTags(graph, [entityID]);
-	    };
+	  if (options.headers || !this.headers) {
+	    this.headers = new Headers(options.headers);
+	  }
 
-	    action.disabled = function(graph) {
-	        var entity = graph.hasEntity(entityID);
-	        if (!entity || entity.type === 'way') { return false; }
+	  this.method = normalizeMethod(options.method || this.method || 'GET');
+	  this.mode = options.mode || this.mode || null;
+	  this.signal = options.signal || this.signal;
+	  this.referrer = null;
 
-	        for (var key in entity.tags) {
-	            var value = entity.tags[key];
-	            if (reverseKey(key) !== key || reverseValue(key, value, true) !== value) {
-	                return false;
-	            }
-	        }
-	        return 'nondirectional_node';
-	    };
+	  if ((this.method === 'GET' || this.method === 'HEAD') && body) {
+	    throw new TypeError('Body not allowed for GET or HEAD requests');
+	  }
 
-	    action.entityID = function() {
-	        return entityID;
-	    };
+	  this._initBody(body);
 
-	    return action;
-	}
+	  if (this.method === 'GET' || this.method === 'HEAD') {
+	    if (options.cache === 'no-store' || options.cache === 'no-cache') {
+	      // Search for a '_' parameter in the query string
+	      var reParamSearch = /([?&])_=[^&]*/;
 
-	function osmIsInterestingTag(key) {
-	    return key !== 'attribution' &&
-	        key !== 'created_by' &&
-	        key !== 'source' &&
-	        key !== 'odbl' &&
-	        key.indexOf('source:') !== 0 &&
-	        key.indexOf('source_ref') !== 0 && // purposely exclude colon
-	        key.indexOf('tiger:') !== 0;
+	      if (reParamSearch.test(this.url)) {
+	        // If it already exists then set the value with the current time
+	        this.url = this.url.replace(reParamSearch, '$1_=' + new Date().getTime());
+	      } else {
+	        // Otherwise add a new '_' parameter to the end with the current time
+	        var reQueryString = /\?/;
+	        this.url += (reQueryString.test(this.url) ? '&' : '?') + '_=' + new Date().getTime();
+	      }
+	    }
+	  }
 	}
 
-	var osmAreaKeys = {};
-	function osmSetAreaKeys(value) {
-	    osmAreaKeys = value;
-	}
+	Request.prototype.clone = function () {
+	  return new Request(this, {
+	    body: this._bodyInit
+	  });
+	};
 
-	// returns an object with the tag from `tags` that implies an area geometry, if any
-	function osmTagSuggestingArea(tags) {
-	    if (tags.area === 'yes') { return { area: 'yes' }; }
-	    if (tags.area === 'no') { return null; }
-
-	    // `highway` and `railway` are typically linear features, but there
-	    // are a few exceptions that should be treated as areas, even in the
-	    // absence of a proper `area=yes` or `areaKeys` tag.. see #4194
-	    var lineKeys = {
-	        highway: {
-	            rest_area: true,
-	            services: true
-	        },
-	        railway: {
-	            roundhouse: true,
-	            station: true,
-	            traverser: true,
-	            turntable: true,
-	            wash: true
-	        }
-	    };
-	    var returnTags = {};
-	    for (var key in tags) {
-	        if (key in osmAreaKeys && !(tags[key] in osmAreaKeys[key])) {
-	            returnTags[key] = tags[key];
-	            return returnTags;
-	        }
-	        if (key in lineKeys && tags[key] in lineKeys[key]) {
-	            returnTags[key] = tags[key];
-	            return returnTags;
-	        }
+	function decode(body) {
+	  var form = new FormData();
+	  body.trim().split('&').forEach(function (bytes) {
+	    if (bytes) {
+	      var split = bytes.split('=');
+	      var name = split.shift().replace(/\+/g, ' ');
+	      var value = split.join('=').replace(/\+/g, ' ');
+	      form.append(decodeURIComponent(name), decodeURIComponent(value));
 	    }
-	    return null;
+	  });
+	  return form;
 	}
 
-	// Tags that indicate a node can be a standalone point
-	// e.g. { amenity: { bar: true, parking: true, ... } ... }
-	var osmPointTags = {};
-	function osmSetPointTags(value) {
-	    osmPointTags = value;
-	}
-	// Tags that indicate a node can be part of a way
-	// e.g. { amenity: { parking: true, ... }, highway: { stop: true ... } ... }
-	var osmVertexTags = {};
-	function osmSetVertexTags(value) {
-	    osmVertexTags = value;
-	}
+	function parseHeaders(rawHeaders) {
+	  var headers = new Headers(); // Replace instances of \r\n and \n followed by at least one space or horizontal tab with a space
+	  // https://tools.ietf.org/html/rfc7230#section-3.2
 
-	function osmNodeGeometriesForTags(nodeTags) {
-	    var geometries = {};
-	    for (var key in nodeTags) {
-	        if (osmPointTags[key] &&
-	            (osmPointTags[key]['*'] || osmPointTags[key][nodeTags[key]])) {
-	            geometries.point = true;
-	        }
-	        if (osmVertexTags[key] &&
-	            (osmVertexTags[key]['*'] || osmVertexTags[key][nodeTags[key]])) {
-	            geometries.vertex = true;
-	        }
-	        // break early if both are already supported
-	        if (geometries.point && geometries.vertex) { break; }
-	    }
-	    return geometries;
-	}
+	  var preProcessedHeaders = rawHeaders.replace(/\r?\n[\t ]+/g, ' '); // Avoiding split via regex to work around a common IE11 bug with the core-js 3.6.0 regex polyfill
+	  // https://github.com/github/fetch/issues/748
+	  // https://github.com/zloirock/core-js/issues/751
 
-	var osmOneWayTags = {
-	    'aerialway': {
-	        'chair_lift': true,
-	        'drag_lift': true,
-	        'j-bar': true,
-	        'magic_carpet': true,
-	        'mixed_lift': true,
-	        'platter': true,
-	        'rope_tow': true,
-	        't-bar': true,
-	        'zip_line': true
-	    },
-	    'highway': {
-	        'motorway': true
-	    },
-	    'junction': {
-	        'circular': true,
-	        'roundabout': true
-	    },
-	    'man_made': {
-	        'goods_conveyor': true,
-	        'piste:halfpipe': true
-	    },
-	    'piste:type': {
-	        'downhill': true,
-	        'sled': true,
-	        'yes': true
-	    },
-	    'waterway': {
-	        'canal': true,
-	        'ditch': true,
-	        'drain': true,
-	        'fish_pass': true,
-	        'river': true,
-	        'stream': true,
-	        'tidal_channel': true
-	    }
-	};
+	  preProcessedHeaders.split('\r').map(function (header) {
+	    return header.indexOf('\n') === 0 ? header.substr(1, header.length) : header;
+	  }).forEach(function (line) {
+	    var parts = line.split(':');
+	    var key = parts.shift().trim();
 
-	// solid and smooth surfaces akin to the assumed default road surface in OSM
-	var osmPavedTags = {
-	    'surface': {
-	        'paved': true,
-	        'asphalt': true,
-	        'concrete': true,
-	        'concrete:lanes': true,
-	        'concrete:plates': true
-	    },
-	    'tracktype': {
-	        'grade1': true
+	    if (key) {
+	      var value = parts.join(':').trim();
+	      headers.append(key, value);
 	    }
-	};
+	  });
+	  return headers;
+	}
 
-	// solid, if somewhat uncommon surfaces with a high range of smoothness
-	var osmSemipavedTags = {
-	    'surface': {
-	        'cobblestone': true,
-	        'cobblestone:flattened': true,
-	        'unhewn_cobblestone': true,
-	        'sett': true,
-	        'paving_stones': true,
-	        'metal': true,
-	        'wood': true
-	    }
-	};
+	Body.call(Request.prototype);
+	function Response(bodyInit, options) {
+	  if (!(this instanceof Response)) {
+	    throw new TypeError('Please use the "new" operator, this DOM object constructor cannot be called as a function.');
+	  }
 
-	var osmRightSideIsInsideTags = {
-	    'natural': {
-	        'cliff': true,
-	        'coastline': 'coastline',
-	    },
-	    'barrier': {
-	        'retaining_wall': true,
-	        'kerb': true,
-	        'guard_rail': true,
-	        'city_wall': true,
-	    },
-	    'man_made': {
-	        'embankment': true
-	    },
-	    'waterway': {
-	        'weir': true
-	    }
-	};
+	  if (!options) {
+	    options = {};
+	  }
 
-	// "highway" tag values for pedestrian or vehicle right-of-ways that make up the routable network
-	// (does not include `raceway`)
-	var osmRoutableHighwayTagValues = {
-	    motorway: true, trunk: true, primary: true, secondary: true, tertiary: true, residential: true,
-	    motorway_link: true, trunk_link: true, primary_link: true, secondary_link: true, tertiary_link: true,
-	    unclassified: true, road: true, service: true, track: true, living_street: true, bus_guideway: true,
-	    path: true, footway: true, cycleway: true, bridleway: true, pedestrian: true, corridor: true, steps: true
-	};
-	// "highway" tag values that generally do not allow motor vehicles
-	var osmPathHighwayTagValues = {
-	    path: true, footway: true, cycleway: true, bridleway: true, pedestrian: true, corridor: true, steps: true
-	};
+	  this.type = 'default';
+	  this.status = options.status === undefined ? 200 : options.status;
+	  this.ok = this.status >= 200 && this.status < 300;
+	  this.statusText = options.statusText === undefined ? '' : '' + options.statusText;
+	  this.headers = new Headers(options.headers);
+	  this.url = options.url || '';
 
-	// "railway" tag values representing existing railroad tracks (purposely does not include 'abandoned')
-	var osmRailwayTrackTagValues = {
-	    rail: true, light_rail: true, tram: true, subway: true,
-	    monorail: true, funicular: true, miniature: true, narrow_gauge: true,
-	    disused: true, preserved: true
-	};
+	  this._initBody(bodyInit);
+	}
+	Body.call(Response.prototype);
 
-	// "waterway" tag values for line features representing water flow
-	var osmFlowingWaterwayTagValues = {
-	    canal: true, ditch: true, drain: true, fish_pass: true, river: true, stream: true, tidal_channel: true
+	Response.prototype.clone = function () {
+	  return new Response(this._bodyInit, {
+	    status: this.status,
+	    statusText: this.statusText,
+	    headers: new Headers(this.headers),
+	    url: this.url
+	  });
 	};
 
-	// Adds floating point numbers with twice the normal precision.
-	// Reference: J. R. Shewchuk, Adaptive Precision Floating-Point Arithmetic and
-	// Fast Robust Geometric Predicates, Discrete & Computational Geometry 18(3)
-	// 305–363 (1997).
-	// Code adapted from GeographicLib by Charles F. F. Karney,
-	// http://geographiclib.sourceforge.net/
-
-	function adder() {
-	  return new Adder;
-	}
+	Response.error = function () {
+	  var response = new Response(null, {
+	    status: 0,
+	    statusText: ''
+	  });
+	  response.type = 'error';
+	  return response;
+	};
 
-	function Adder() {
-	  this.reset();
-	}
+	var redirectStatuses = [301, 302, 303, 307, 308];
 
-	Adder.prototype = {
-	  constructor: Adder,
-	  reset: function() {
-	    this.s = // rounded value
-	    this.t = 0; // exact error
-	  },
-	  add: function(y) {
-	    add(temp, y, this.t);
-	    add(this, temp.s, this.s);
-	    if (this.s) { this.t += temp.t; }
-	    else { this.s = temp.t; }
-	  },
-	  valueOf: function() {
-	    return this.s;
+	Response.redirect = function (url, status) {
+	  if (redirectStatuses.indexOf(status) === -1) {
+	    throw new RangeError('Invalid status code');
 	  }
+
+	  return new Response(null, {
+	    status: status,
+	    headers: {
+	      location: url
+	    }
+	  });
 	};
 
-	var temp = new Adder;
+	var DOMException$1 = global$8.DOMException;
 
-	function add(adder, a, b) {
-	  var x = adder.s = a + b,
-	      bv = x - a,
-	      av = x - bv;
-	  adder.t = (a - av) + (b - bv);
-	}
+	try {
+	  new DOMException$1();
+	} catch (err) {
+	  DOMException$1 = function DOMException(message, name) {
+	    this.message = message;
+	    this.name = name;
+	    var error = Error(message);
+	    this.stack = error.stack;
+	  };
 
-	var epsilon = 1e-6;
-	var epsilon2 = 1e-12;
-	var pi = Math.PI;
-	var halfPi = pi / 2;
-	var quarterPi = pi / 4;
-	var tau = pi * 2;
+	  DOMException$1.prototype = Object.create(Error.prototype);
+	  DOMException$1.prototype.constructor = DOMException$1;
+	}
 
-	var degrees = 180 / pi;
-	var radians = pi / 180;
+	function fetch$1(input, init) {
+	  return new Promise(function (resolve, reject) {
+	    var request = new Request(input, init);
 
-	var abs$2 = Math.abs;
-	var atan = Math.atan;
-	var atan2 = Math.atan2;
-	var cos = Math.cos;
-	var exp = Math.exp;
-	var log = Math.log;
-	var sin = Math.sin;
-	var sign$2 = Math.sign || function(x) { return x > 0 ? 1 : x < 0 ? -1 : 0; };
-	var sqrt = Math.sqrt;
-	var tan = Math.tan;
+	    if (request.signal && request.signal.aborted) {
+	      return reject(new DOMException$1('Aborted', 'AbortError'));
+	    }
 
-	function acos(x) {
-	  return x > 1 ? 0 : x < -1 ? pi : Math.acos(x);
-	}
+	    var xhr = new XMLHttpRequest();
 
-	function asin(x) {
-	  return x > 1 ? halfPi : x < -1 ? -halfPi : Math.asin(x);
-	}
+	    function abortXhr() {
+	      xhr.abort();
+	    }
 
-	function noop$2() {}
+	    xhr.onload = function () {
+	      var options = {
+	        status: xhr.status,
+	        statusText: xhr.statusText,
+	        headers: parseHeaders(xhr.getAllResponseHeaders() || '')
+	      };
+	      options.url = 'responseURL' in xhr ? xhr.responseURL : options.headers.get('X-Request-URL');
+	      var body = 'response' in xhr ? xhr.response : xhr.responseText;
+	      setTimeout(function () {
+	        resolve(new Response(body, options));
+	      }, 0);
+	    };
 
-	function streamGeometry(geometry, stream) {
-	  if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) {
-	    streamGeometryType[geometry.type](geometry, stream);
-	  }
-	}
+	    xhr.onerror = function () {
+	      setTimeout(function () {
+	        reject(new TypeError('Network request failed'));
+	      }, 0);
+	    };
 
-	var streamObjectType = {
-	  Feature: function(object, stream) {
-	    streamGeometry(object.geometry, stream);
-	  },
-	  FeatureCollection: function(object, stream) {
-	    var features = object.features, i = -1, n = features.length;
-	    while (++i < n) { streamGeometry(features[i].geometry, stream); }
-	  }
-	};
+	    xhr.ontimeout = function () {
+	      setTimeout(function () {
+	        reject(new TypeError('Network request failed'));
+	      }, 0);
+	    };
 
-	var streamGeometryType = {
-	  Sphere: function(object, stream) {
-	    stream.sphere();
-	  },
-	  Point: function(object, stream) {
-	    object = object.coordinates;
-	    stream.point(object[0], object[1], object[2]);
-	  },
-	  MultiPoint: function(object, stream) {
-	    var coordinates = object.coordinates, i = -1, n = coordinates.length;
-	    while (++i < n) { object = coordinates[i], stream.point(object[0], object[1], object[2]); }
-	  },
-	  LineString: function(object, stream) {
-	    streamLine(object.coordinates, stream, 0);
-	  },
-	  MultiLineString: function(object, stream) {
-	    var coordinates = object.coordinates, i = -1, n = coordinates.length;
-	    while (++i < n) { streamLine(coordinates[i], stream, 0); }
-	  },
-	  Polygon: function(object, stream) {
-	    streamPolygon(object.coordinates, stream);
-	  },
-	  MultiPolygon: function(object, stream) {
-	    var coordinates = object.coordinates, i = -1, n = coordinates.length;
-	    while (++i < n) { streamPolygon(coordinates[i], stream); }
-	  },
-	  GeometryCollection: function(object, stream) {
-	    var geometries = object.geometries, i = -1, n = geometries.length;
-	    while (++i < n) { streamGeometry(geometries[i], stream); }
-	  }
-	};
+	    xhr.onabort = function () {
+	      setTimeout(function () {
+	        reject(new DOMException$1('Aborted', 'AbortError'));
+	      }, 0);
+	    };
 
-	function streamLine(coordinates, stream, closed) {
-	  var i = -1, n = coordinates.length - closed, coordinate;
-	  stream.lineStart();
-	  while (++i < n) { coordinate = coordinates[i], stream.point(coordinate[0], coordinate[1], coordinate[2]); }
-	  stream.lineEnd();
-	}
+	    function fixUrl(url) {
+	      try {
+	        return url === '' && global$8.location.href ? global$8.location.href : url;
+	      } catch (e) {
+	        return url;
+	      }
+	    }
 
-	function streamPolygon(coordinates, stream) {
-	  var i = -1, n = coordinates.length;
-	  stream.polygonStart();
-	  while (++i < n) { streamLine(coordinates[i], stream, 1); }
-	  stream.polygonEnd();
-	}
+	    xhr.open(request.method, fixUrl(request.url), true);
 
-	function d3_geoStream(object, stream) {
-	  if (object && streamObjectType.hasOwnProperty(object.type)) {
-	    streamObjectType[object.type](object, stream);
-	  } else {
-	    streamGeometry(object, stream);
-	  }
-	}
+	    if (request.credentials === 'include') {
+	      xhr.withCredentials = true;
+	    } else if (request.credentials === 'omit') {
+	      xhr.withCredentials = false;
+	    }
 
-	var areaRingSum = adder();
+	    if ('responseType' in xhr) {
+	      if (support.blob) {
+	        xhr.responseType = 'blob';
+	      } else if (support.arrayBuffer && request.headers.get('Content-Type') && request.headers.get('Content-Type').indexOf('application/octet-stream') !== -1) {
+	        xhr.responseType = 'arraybuffer';
+	      }
+	    }
 
-	var areaSum = adder(),
-	    lambda00,
-	    phi00,
-	    lambda0,
-	    cosPhi0,
-	    sinPhi0;
+	    if (init && _typeof(init.headers) === 'object' && !(init.headers instanceof Headers)) {
+	      Object.getOwnPropertyNames(init.headers).forEach(function (name) {
+	        xhr.setRequestHeader(name, normalizeValue(init.headers[name]));
+	      });
+	    } else {
+	      request.headers.forEach(function (value, name) {
+	        xhr.setRequestHeader(name, value);
+	      });
+	    }
 
-	var areaStream = {
-	  point: noop$2,
-	  lineStart: noop$2,
-	  lineEnd: noop$2,
-	  polygonStart: function() {
-	    areaRingSum.reset();
-	    areaStream.lineStart = areaRingStart;
-	    areaStream.lineEnd = areaRingEnd;
-	  },
-	  polygonEnd: function() {
-	    var areaRing = +areaRingSum;
-	    areaSum.add(areaRing < 0 ? tau + areaRing : areaRing);
-	    this.lineStart = this.lineEnd = this.point = noop$2;
-	  },
-	  sphere: function() {
-	    areaSum.add(tau);
-	  }
-	};
+	    if (request.signal) {
+	      request.signal.addEventListener('abort', abortXhr);
 
-	function areaRingStart() {
-	  areaStream.point = areaPointFirst;
-	}
+	      xhr.onreadystatechange = function () {
+	        // DONE (success or failure)
+	        if (xhr.readyState === 4) {
+	          request.signal.removeEventListener('abort', abortXhr);
+	        }
+	      };
+	    }
 
-	function areaRingEnd() {
-	  areaPoint(lambda00, phi00);
+	    xhr.send(typeof request._bodyInit === 'undefined' ? null : request._bodyInit);
+	  });
 	}
+	fetch$1.polyfill = true;
 
-	function areaPointFirst(lambda, phi) {
-	  areaStream.point = areaPoint;
-	  lambda00 = lambda, phi00 = phi;
-	  lambda *= radians, phi *= radians;
-	  lambda0 = lambda, cosPhi0 = cos(phi = phi / 2 + quarterPi), sinPhi0 = sin(phi);
+	if (!global$8.fetch) {
+	  global$8.fetch = fetch$1;
+	  global$8.Headers = Headers;
+	  global$8.Request = Request;
+	  global$8.Response = Response;
 	}
 
-	function areaPoint(lambda, phi) {
-	  lambda *= radians, phi *= radians;
-	  phi = phi / 2 + quarterPi; // half the angular distance from south pole
-
-	  // Spherical excess E for a spherical triangle with vertices: south pole,
-	  // previous point, current point.  Uses a formula derived from Cagnoli’s
-	  // theorem.  See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2).
-	  var dLambda = lambda - lambda0,
-	      sdLambda = dLambda >= 0 ? 1 : -1,
-	      adLambda = sdLambda * dLambda,
-	      cosPhi = cos(phi),
-	      sinPhi = sin(phi),
-	      k = sinPhi0 * sinPhi,
-	      u = cosPhi0 * cosPhi + k * cos(adLambda),
-	      v = k * sdLambda * sin(adLambda);
-	  areaRingSum.add(atan2(v, u));
+	var $$L = _export;
+	var DESCRIPTORS$7 = descriptors;
+	var objectDefinePropertyModile = objectDefineProperty;
 
-	  // Advance the previous points.
-	  lambda0 = lambda, cosPhi0 = cosPhi, sinPhi0 = sinPhi;
-	}
+	// `Object.defineProperty` method
+	// https://tc39.es/ecma262/#sec-object.defineproperty
+	$$L({ target: 'Object', stat: true, forced: !DESCRIPTORS$7, sham: !DESCRIPTORS$7 }, {
+	  defineProperty: objectDefinePropertyModile.f
+	});
 
-	function d3_geoArea(object) {
-	  areaSum.reset();
-	  d3_geoStream(object, areaStream);
-	  return areaSum * 2;
-	}
+	var $$K = _export;
+	var setPrototypeOf = objectSetPrototypeOf;
 
-	function spherical(cartesian) {
-	  return [atan2(cartesian[1], cartesian[0]), asin(cartesian[2])];
-	}
+	// `Object.setPrototypeOf` method
+	// https://tc39.es/ecma262/#sec-object.setprototypeof
+	$$K({ target: 'Object', stat: true }, {
+	  setPrototypeOf: setPrototypeOf
+	});
 
-	function cartesian(spherical) {
-	  var lambda = spherical[0], phi = spherical[1], cosPhi = cos(phi);
-	  return [cosPhi * cos(lambda), cosPhi * sin(lambda), sin(phi)];
-	}
+	var $$J = _export;
+	var fails$i = fails$N;
+	var toObject$5 = toObject$i;
+	var nativeGetPrototypeOf = objectGetPrototypeOf;
+	var CORRECT_PROTOTYPE_GETTER = correctPrototypeGetter;
 
-	function cartesianDot(a, b) {
-	  return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
-	}
+	var FAILS_ON_PRIMITIVES$3 = fails$i(function () { nativeGetPrototypeOf(1); });
 
-	function cartesianCross(a, b) {
-	  return [a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]];
-	}
+	// `Object.getPrototypeOf` method
+	// https://tc39.es/ecma262/#sec-object.getprototypeof
+	$$J({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$3, sham: !CORRECT_PROTOTYPE_GETTER }, {
+	  getPrototypeOf: function getPrototypeOf(it) {
+	    return nativeGetPrototypeOf(toObject$5(it));
+	  }
+	});
 
-	// TODO return a
-	function cartesianAddInPlace(a, b) {
-	  a[0] += b[0], a[1] += b[1], a[2] += b[2];
-	}
+	var aFunction$2 = aFunction$9;
+	var isObject$a = isObject$r;
+
+	var slice$2 = [].slice;
+	var factories = {};
+
+	var construct = function (C, argsLength, args) {
+	  if (!(argsLength in factories)) {
+	    for (var list = [], i = 0; i < argsLength; i++) list[i] = 'a[' + i + ']';
+	    // eslint-disable-next-line no-new-func -- we have no proper alternatives, IE8- only
+	    factories[argsLength] = Function('C,a', 'return new C(' + list.join(',') + ')');
+	  } return factories[argsLength](C, args);
+	};
+
+	// `Function.prototype.bind` method implementation
+	// https://tc39.es/ecma262/#sec-function.prototype.bind
+	var functionBind = Function.bind || function bind(that /* , ...args */) {
+	  var fn = aFunction$2(this);
+	  var partArgs = slice$2.call(arguments, 1);
+	  var boundFunction = function bound(/* args... */) {
+	    var args = partArgs.concat(slice$2.call(arguments));
+	    return this instanceof boundFunction ? construct(fn, args.length, args) : fn.apply(that, args);
+	  };
+	  if (isObject$a(fn.prototype)) boundFunction.prototype = fn.prototype;
+	  return boundFunction;
+	};
+
+	var $$I = _export;
+	var getBuiltIn$1 = getBuiltIn$9;
+	var aFunction$1 = aFunction$9;
+	var anObject$3 = anObject$m;
+	var isObject$9 = isObject$r;
+	var create$5 = objectCreate;
+	var bind$4 = functionBind;
+	var fails$h = fails$N;
+
+	var nativeConstruct = getBuiltIn$1('Reflect', 'construct');
+
+	// `Reflect.construct` method
+	// https://tc39.es/ecma262/#sec-reflect.construct
+	// MS Edge supports only 2 arguments and argumentsList argument is optional
+	// FF Nightly sets third argument as `new.target`, but does not create `this` from it
+	var NEW_TARGET_BUG = fails$h(function () {
+	  function F() { /* empty */ }
+	  return !(nativeConstruct(function () { /* empty */ }, [], F) instanceof F);
+	});
+	var ARGS_BUG = !fails$h(function () {
+	  nativeConstruct(function () { /* empty */ });
+	});
+	var FORCED$a = NEW_TARGET_BUG || ARGS_BUG;
+
+	$$I({ target: 'Reflect', stat: true, forced: FORCED$a, sham: FORCED$a }, {
+	  construct: function construct(Target, args /* , newTarget */) {
+	    aFunction$1(Target);
+	    anObject$3(args);
+	    var newTarget = arguments.length < 3 ? Target : aFunction$1(arguments[2]);
+	    if (ARGS_BUG && !NEW_TARGET_BUG) return nativeConstruct(Target, args, newTarget);
+	    if (Target == newTarget) {
+	      // w/o altered newTarget, optimization for 0-4 arguments
+	      switch (args.length) {
+	        case 0: return new Target();
+	        case 1: return new Target(args[0]);
+	        case 2: return new Target(args[0], args[1]);
+	        case 3: return new Target(args[0], args[1], args[2]);
+	        case 4: return new Target(args[0], args[1], args[2], args[3]);
+	      }
+	      // w/o altered newTarget, lot of arguments case
+	      var $args = [null];
+	      $args.push.apply($args, args);
+	      return new (bind$4.apply(Target, $args))();
+	    }
+	    // with altered newTarget, not support built-in constructors
+	    var proto = newTarget.prototype;
+	    var instance = create$5(isObject$9(proto) ? proto : Object.prototype);
+	    var result = Function.apply.call(Target, instance, args);
+	    return isObject$9(result) ? result : instance;
+	  }
+	});
 
-	function cartesianScale(vector, k) {
-	  return [vector[0] * k, vector[1] * k, vector[2] * k];
-	}
+	var $$H = _export;
+	var isObject$8 = isObject$r;
+	var anObject$2 = anObject$m;
+	var has$3 = has$j;
+	var getOwnPropertyDescriptorModule = objectGetOwnPropertyDescriptor;
+	var getPrototypeOf = objectGetPrototypeOf;
+
+	// `Reflect.get` method
+	// https://tc39.es/ecma262/#sec-reflect.get
+	function get$3(target, propertyKey /* , receiver */) {
+	  var receiver = arguments.length < 3 ? target : arguments[2];
+	  var descriptor, prototype;
+	  if (anObject$2(target) === receiver) return target[propertyKey];
+	  if (descriptor = getOwnPropertyDescriptorModule.f(target, propertyKey)) return has$3(descriptor, 'value')
+	    ? descriptor.value
+	    : descriptor.get === undefined
+	      ? undefined
+	      : descriptor.get.call(receiver);
+	  if (isObject$8(prototype = getPrototypeOf(target))) return get$3(prototype, propertyKey, receiver);
+	}
+
+	$$H({ target: 'Reflect', stat: true }, {
+	  get: get$3
+	});
 
-	// TODO return d
-	function cartesianNormalizeInPlace(d) {
-	  var l = sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
-	  d[0] /= l, d[1] /= l, d[2] /= l;
-	}
+	var $$G = _export;
+	var fails$g = fails$N;
+	var toIndexedObject$1 = toIndexedObject$b;
+	var nativeGetOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;
+	var DESCRIPTORS$6 = descriptors;
 
-	var lambda0$1, phi0, lambda1, phi1, // bounds
-	    lambda2, // previous lambda-coordinate
-	    lambda00$1, phi00$1, // first point
-	    p0, // previous 3D point
-	    deltaSum = adder(),
-	    ranges,
-	    range;
+	var FAILS_ON_PRIMITIVES$2 = fails$g(function () { nativeGetOwnPropertyDescriptor(1); });
+	var FORCED$9 = !DESCRIPTORS$6 || FAILS_ON_PRIMITIVES$2;
 
-	var boundsStream = {
-	  point: boundsPoint,
-	  lineStart: boundsLineStart,
-	  lineEnd: boundsLineEnd,
-	  polygonStart: function() {
-	    boundsStream.point = boundsRingPoint;
-	    boundsStream.lineStart = boundsRingStart;
-	    boundsStream.lineEnd = boundsRingEnd;
-	    deltaSum.reset();
-	    areaStream.polygonStart();
-	  },
-	  polygonEnd: function() {
-	    areaStream.polygonEnd();
-	    boundsStream.point = boundsPoint;
-	    boundsStream.lineStart = boundsLineStart;
-	    boundsStream.lineEnd = boundsLineEnd;
-	    if (areaRingSum < 0) { lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90); }
-	    else if (deltaSum > epsilon) { phi1 = 90; }
-	    else if (deltaSum < -epsilon) { phi0 = -90; }
-	    range[0] = lambda0$1, range[1] = lambda1;
-	  },
-	  sphere: function() {
-	    lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);
+	// `Object.getOwnPropertyDescriptor` method
+	// https://tc39.es/ecma262/#sec-object.getownpropertydescriptor
+	$$G({ target: 'Object', stat: true, forced: FORCED$9, sham: !DESCRIPTORS$6 }, {
+	  getOwnPropertyDescriptor: function getOwnPropertyDescriptor(it, key) {
+	    return nativeGetOwnPropertyDescriptor(toIndexedObject$1(it), key);
 	  }
-	};
-
-	function boundsPoint(lambda, phi) {
-	  ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
-	  if (phi < phi0) { phi0 = phi; }
-	  if (phi > phi1) { phi1 = phi; }
-	}
+	});
 
-	function linePoint(lambda, phi) {
-	  var p = cartesian([lambda * radians, phi * radians]);
-	  if (p0) {
-	    var normal = cartesianCross(p0, p),
-	        equatorial = [normal[1], -normal[0], 0],
-	        inflection = cartesianCross(equatorial, normal);
-	    cartesianNormalizeInPlace(inflection);
-	    inflection = spherical(inflection);
-	    var delta = lambda - lambda2,
-	        sign = delta > 0 ? 1 : -1,
-	        lambdai = inflection[0] * degrees * sign,
-	        phii,
-	        antimeridian = abs$2(delta) > 180;
-	    if (antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
-	      phii = inflection[1] * degrees;
-	      if (phii > phi1) { phi1 = phii; }
-	    } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
-	      phii = -inflection[1] * degrees;
-	      if (phii < phi0) { phi0 = phii; }
+	var $$F = _export;
+	var toAbsoluteIndex$1 = toAbsoluteIndex$8;
+	var toInteger$2 = toInteger$b;
+	var toLength$6 = toLength$q;
+	var toObject$4 = toObject$i;
+	var arraySpeciesCreate$1 = arraySpeciesCreate$3;
+	var createProperty$1 = createProperty$4;
+	var arrayMethodHasSpeciesSupport$2 = arrayMethodHasSpeciesSupport$5;
+
+	var HAS_SPECIES_SUPPORT$1 = arrayMethodHasSpeciesSupport$2('splice');
+
+	var max$1 = Math.max;
+	var min$3 = Math.min;
+	var MAX_SAFE_INTEGER$1 = 0x1FFFFFFFFFFFFF;
+	var MAXIMUM_ALLOWED_LENGTH_EXCEEDED = 'Maximum allowed length exceeded';
+
+	// `Array.prototype.splice` method
+	// https://tc39.es/ecma262/#sec-array.prototype.splice
+	// with adding support of @@species
+	$$F({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$1 }, {
+	  splice: function splice(start, deleteCount /* , ...items */) {
+	    var O = toObject$4(this);
+	    var len = toLength$6(O.length);
+	    var actualStart = toAbsoluteIndex$1(start, len);
+	    var argumentsLength = arguments.length;
+	    var insertCount, actualDeleteCount, A, k, from, to;
+	    if (argumentsLength === 0) {
+	      insertCount = actualDeleteCount = 0;
+	    } else if (argumentsLength === 1) {
+	      insertCount = 0;
+	      actualDeleteCount = len - actualStart;
 	    } else {
-	      if (phi < phi0) { phi0 = phi; }
-	      if (phi > phi1) { phi1 = phi; }
-	    }
-	    if (antimeridian) {
-	      if (lambda < lambda2) {
-	        if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) { lambda1 = lambda; }
-	      } else {
-	        if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) { lambda0$1 = lambda; }
+	      insertCount = argumentsLength - 2;
+	      actualDeleteCount = min$3(max$1(toInteger$2(deleteCount), 0), len - actualStart);
+	    }
+	    if (len + insertCount - actualDeleteCount > MAX_SAFE_INTEGER$1) {
+	      throw TypeError(MAXIMUM_ALLOWED_LENGTH_EXCEEDED);
+	    }
+	    A = arraySpeciesCreate$1(O, actualDeleteCount);
+	    for (k = 0; k < actualDeleteCount; k++) {
+	      from = actualStart + k;
+	      if (from in O) createProperty$1(A, k, O[from]);
+	    }
+	    A.length = actualDeleteCount;
+	    if (insertCount < actualDeleteCount) {
+	      for (k = actualStart; k < len - actualDeleteCount; k++) {
+	        from = k + actualDeleteCount;
+	        to = k + insertCount;
+	        if (from in O) O[to] = O[from];
+	        else delete O[to];
 	      }
-	    } else {
-	      if (lambda1 >= lambda0$1) {
-	        if (lambda < lambda0$1) { lambda0$1 = lambda; }
-	        if (lambda > lambda1) { lambda1 = lambda; }
-	      } else {
-	        if (lambda > lambda2) {
-	          if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) { lambda1 = lambda; }
-	        } else {
-	          if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) { lambda0$1 = lambda; }
-	        }
+	      for (k = len; k > len - actualDeleteCount + insertCount; k--) delete O[k - 1];
+	    } else if (insertCount > actualDeleteCount) {
+	      for (k = len - actualDeleteCount; k > actualStart; k--) {
+	        from = k + actualDeleteCount - 1;
+	        to = k + insertCount - 1;
+	        if (from in O) O[to] = O[from];
+	        else delete O[to];
 	      }
 	    }
-	  } else {
-	    ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
+	    for (k = 0; k < insertCount; k++) {
+	      O[k + actualStart] = arguments[k + 2];
+	    }
+	    O.length = len - actualDeleteCount + insertCount;
+	    return A;
 	  }
-	  if (phi < phi0) { phi0 = phi; }
-	  if (phi > phi1) { phi1 = phi; }
-	  p0 = p, lambda2 = lambda;
-	}
+	});
 
-	function boundsLineStart() {
-	  boundsStream.point = linePoint;
-	}
+	var defineWellKnownSymbol$1 = defineWellKnownSymbol$4;
 
-	function boundsLineEnd() {
-	  range[0] = lambda0$1, range[1] = lambda1;
-	  boundsStream.point = boundsPoint;
-	  p0 = null;
-	}
+	// `Symbol.toStringTag` well-known symbol
+	// https://tc39.es/ecma262/#sec-symbol.tostringtag
+	defineWellKnownSymbol$1('toStringTag');
 
-	function boundsRingPoint(lambda, phi) {
-	  if (p0) {
-	    var delta = lambda - lambda2;
-	    deltaSum.add(abs$2(delta) > 180 ? delta + (delta > 0 ? 360 : -360) : delta);
-	  } else {
-	    lambda00$1 = lambda, phi00$1 = phi;
-	  }
-	  areaStream.point(lambda, phi);
-	  linePoint(lambda, phi);
-	}
+	var global$7 = global$F;
+	var setToStringTag$2 = setToStringTag$a;
 
-	function boundsRingStart() {
-	  areaStream.lineStart();
-	}
+	// JSON[@@toStringTag] property
+	// https://tc39.es/ecma262/#sec-json-@@tostringtag
+	setToStringTag$2(global$7.JSON, 'JSON', true);
 
-	function boundsRingEnd() {
-	  boundsRingPoint(lambda00$1, phi00$1);
-	  areaStream.lineEnd();
-	  if (abs$2(deltaSum) > epsilon) { lambda0$1 = -(lambda1 = 180); }
-	  range[0] = lambda0$1, range[1] = lambda1;
-	  p0 = null;
-	}
+	var setToStringTag$1 = setToStringTag$a;
 
-	// Finds the left-right distance between two longitudes.
-	// This is almost the same as (lambda1 - lambda0 + 360°) % 360°, except that we want
-	// the distance between ±180° to be 360°.
-	function angle(lambda0, lambda1) {
-	  return (lambda1 -= lambda0) < 0 ? lambda1 + 360 : lambda1;
-	}
+	// Math[@@toStringTag] property
+	// https://tc39.es/ecma262/#sec-math-@@tostringtag
+	setToStringTag$1(Math, 'Math', true);
 
-	function rangeCompare(a, b) {
-	  return a[0] - b[0];
-	}
+	(function (factory) {
+	  factory();
+	})(function () {
 
-	function rangeContains(range, x) {
-	  return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;
-	}
+	  function _classCallCheck(instance, Constructor) {
+	    if (!(instance instanceof Constructor)) {
+	      throw new TypeError("Cannot call a class as a function");
+	    }
+	  }
 
-	function d3_geoBounds(feature) {
-	  var i, n, a, b, merged, deltaMax, delta;
+	  function _defineProperties(target, props) {
+	    for (var i = 0; i < props.length; i++) {
+	      var descriptor = props[i];
+	      descriptor.enumerable = descriptor.enumerable || false;
+	      descriptor.configurable = true;
+	      if ("value" in descriptor) descriptor.writable = true;
+	      Object.defineProperty(target, descriptor.key, descriptor);
+	    }
+	  }
 
-	  phi1 = lambda1 = -(lambda0$1 = phi0 = Infinity);
-	  ranges = [];
-	  d3_geoStream(feature, boundsStream);
+	  function _createClass(Constructor, protoProps, staticProps) {
+	    if (protoProps) _defineProperties(Constructor.prototype, protoProps);
+	    if (staticProps) _defineProperties(Constructor, staticProps);
+	    return Constructor;
+	  }
 
-	  // First, sort ranges by their minimum longitudes.
-	  if (n = ranges.length) {
-	    ranges.sort(rangeCompare);
+	  function _inherits(subClass, superClass) {
+	    if (typeof superClass !== "function" && superClass !== null) {
+	      throw new TypeError("Super expression must either be null or a function");
+	    }
 
-	    // Then, merge any ranges that overlap.
-	    for (i = 1, a = ranges[0], merged = [a]; i < n; ++i) {
-	      b = ranges[i];
-	      if (rangeContains(a, b[0]) || rangeContains(a, b[1])) {
-	        if (angle(a[0], b[1]) > angle(a[0], a[1])) { a[1] = b[1]; }
-	        if (angle(b[0], a[1]) > angle(a[0], a[1])) { a[0] = b[0]; }
-	      } else {
-	        merged.push(a = b);
+	    subClass.prototype = Object.create(superClass && superClass.prototype, {
+	      constructor: {
+	        value: subClass,
+	        writable: true,
+	        configurable: true
 	      }
-	    }
+	    });
+	    if (superClass) _setPrototypeOf(subClass, superClass);
+	  }
 
-	    // Finally, find the largest gap between the merged ranges.
-	    // The final bounding box will be the inverse of this gap.
-	    for (deltaMax = -Infinity, n = merged.length - 1, i = 0, a = merged[n]; i <= n; a = b, ++i) {
-	      b = merged[i];
-	      if ((delta = angle(a[1], b[0])) > deltaMax) { deltaMax = delta, lambda0$1 = b[0], lambda1 = a[1]; }
-	    }
+	  function _getPrototypeOf(o) {
+	    _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {
+	      return o.__proto__ || Object.getPrototypeOf(o);
+	    };
+	    return _getPrototypeOf(o);
 	  }
 
-	  ranges = range = null;
+	  function _setPrototypeOf(o, p) {
+	    _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
+	      o.__proto__ = p;
+	      return o;
+	    };
 
-	  return lambda0$1 === Infinity || phi0 === Infinity
-	      ? [[NaN, NaN], [NaN, NaN]]
-	      : [[lambda0$1, phi0], [lambda1, phi1]];
-	}
+	    return _setPrototypeOf(o, p);
+	  }
 
-	var W0, W1,
-	    X0, Y0, Z0,
-	    X1, Y1, Z1,
-	    X2, Y2, Z2,
-	    lambda00$2, phi00$2, // first point
-	    x0, y0, z0; // previous point
+	  function _isNativeReflectConstruct() {
+	    if (typeof Reflect === "undefined" || !Reflect.construct) return false;
+	    if (Reflect.construct.sham) return false;
+	    if (typeof Proxy === "function") return true;
 
-	var centroidStream = {
-	  sphere: noop$2,
-	  point: centroidPoint,
-	  lineStart: centroidLineStart,
-	  lineEnd: centroidLineEnd,
-	  polygonStart: function() {
-	    centroidStream.lineStart = centroidRingStart;
-	    centroidStream.lineEnd = centroidRingEnd;
-	  },
-	  polygonEnd: function() {
-	    centroidStream.lineStart = centroidLineStart;
-	    centroidStream.lineEnd = centroidLineEnd;
+	    try {
+	      Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {}));
+	      return true;
+	    } catch (e) {
+	      return false;
+	    }
 	  }
-	};
 
-	// Arithmetic mean of Cartesian vectors.
-	function centroidPoint(lambda, phi) {
-	  lambda *= radians, phi *= radians;
-	  var cosPhi = cos(phi);
-	  centroidPointCartesian(cosPhi * cos(lambda), cosPhi * sin(lambda), sin(phi));
-	}
+	  function _assertThisInitialized(self) {
+	    if (self === void 0) {
+	      throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
+	    }
 
-	function centroidPointCartesian(x, y, z) {
-	  ++W0;
-	  X0 += (x - X0) / W0;
-	  Y0 += (y - Y0) / W0;
-	  Z0 += (z - Z0) / W0;
-	}
+	    return self;
+	  }
 
-	function centroidLineStart() {
-	  centroidStream.point = centroidLinePointFirst;
-	}
+	  function _possibleConstructorReturn(self, call) {
+	    if (call && (_typeof(call) === "object" || typeof call === "function")) {
+	      return call;
+	    }
 
-	function centroidLinePointFirst(lambda, phi) {
-	  lambda *= radians, phi *= radians;
-	  var cosPhi = cos(phi);
-	  x0 = cosPhi * cos(lambda);
-	  y0 = cosPhi * sin(lambda);
-	  z0 = sin(phi);
-	  centroidStream.point = centroidLinePoint;
-	  centroidPointCartesian(x0, y0, z0);
-	}
+	    return _assertThisInitialized(self);
+	  }
 
-	function centroidLinePoint(lambda, phi) {
-	  lambda *= radians, phi *= radians;
-	  var cosPhi = cos(phi),
-	      x = cosPhi * cos(lambda),
-	      y = cosPhi * sin(lambda),
-	      z = sin(phi),
-	      w = atan2(sqrt((w = y0 * z - z0 * y) * w + (w = z0 * x - x0 * z) * w + (w = x0 * y - y0 * x) * w), x0 * x + y0 * y + z0 * z);
-	  W1 += w;
-	  X1 += w * (x0 + (x0 = x));
-	  Y1 += w * (y0 + (y0 = y));
-	  Z1 += w * (z0 + (z0 = z));
-	  centroidPointCartesian(x0, y0, z0);
-	}
+	  function _createSuper(Derived) {
+	    var hasNativeReflectConstruct = _isNativeReflectConstruct();
 
-	function centroidLineEnd() {
-	  centroidStream.point = centroidPoint;
-	}
+	    return function _createSuperInternal() {
+	      var Super = _getPrototypeOf(Derived),
+	          result;
 
-	// See J. E. Brock, The Inertia Tensor for a Spherical Triangle,
-	// J. Applied Mechanics 42, 239 (1975).
-	function centroidRingStart() {
-	  centroidStream.point = centroidRingPointFirst;
-	}
+	      if (hasNativeReflectConstruct) {
+	        var NewTarget = _getPrototypeOf(this).constructor;
 
-	function centroidRingEnd() {
-	  centroidRingPoint(lambda00$2, phi00$2);
-	  centroidStream.point = centroidPoint;
-	}
+	        result = Reflect.construct(Super, arguments, NewTarget);
+	      } else {
+	        result = Super.apply(this, arguments);
+	      }
 
-	function centroidRingPointFirst(lambda, phi) {
-	  lambda00$2 = lambda, phi00$2 = phi;
-	  lambda *= radians, phi *= radians;
-	  centroidStream.point = centroidRingPoint;
-	  var cosPhi = cos(phi);
-	  x0 = cosPhi * cos(lambda);
-	  y0 = cosPhi * sin(lambda);
-	  z0 = sin(phi);
-	  centroidPointCartesian(x0, y0, z0);
-	}
+	      return _possibleConstructorReturn(this, result);
+	    };
+	  }
 
-	function centroidRingPoint(lambda, phi) {
-	  lambda *= radians, phi *= radians;
-	  var cosPhi = cos(phi),
-	      x = cosPhi * cos(lambda),
-	      y = cosPhi * sin(lambda),
-	      z = sin(phi),
-	      cx = y0 * z - z0 * y,
-	      cy = z0 * x - x0 * z,
-	      cz = x0 * y - y0 * x,
-	      m = sqrt(cx * cx + cy * cy + cz * cz),
-	      w = asin(m), // line weight = angle
-	      v = m && -w / m; // area weight multiplier
-	  X2 += v * cx;
-	  Y2 += v * cy;
-	  Z2 += v * cz;
-	  W1 += w;
-	  X1 += w * (x0 + (x0 = x));
-	  Y1 += w * (y0 + (y0 = y));
-	  Z1 += w * (z0 + (z0 = z));
-	  centroidPointCartesian(x0, y0, z0);
-	}
-
-	function d3_geoCentroid(object) {
-	  W0 = W1 =
-	  X0 = Y0 = Z0 =
-	  X1 = Y1 = Z1 =
-	  X2 = Y2 = Z2 = 0;
-	  d3_geoStream(object, centroidStream);
-
-	  var x = X2,
-	      y = Y2,
-	      z = Z2,
-	      m = x * x + y * y + z * z;
-
-	  // If the area-weighted ccentroid is undefined, fall back to length-weighted ccentroid.
-	  if (m < epsilon2) {
-	    x = X1, y = Y1, z = Z1;
-	    // If the feature has zero length, fall back to arithmetic mean of point vectors.
-	    if (W1 < epsilon) { x = X0, y = Y0, z = Z0; }
-	    m = x * x + y * y + z * z;
-	    // If the feature still has an undefined ccentroid, then return.
-	    if (m < epsilon2) { return [NaN, NaN]; }
-	  }
-
-	  return [atan2(y, x) * degrees, asin(z / sqrt(m)) * degrees];
-	}
-
-	function compose(a, b) {
+	  function _superPropBase(object, property) {
+	    while (!Object.prototype.hasOwnProperty.call(object, property)) {
+	      object = _getPrototypeOf(object);
+	      if (object === null) break;
+	    }
 
-	  function compose(x, y) {
-	    return x = a(x, y), b(x[0], x[1]);
+	    return object;
 	  }
 
-	  if (a.invert && b.invert) { compose.invert = function(x, y) {
-	    return x = b.invert(x, y), x && a.invert(x[0], x[1]);
-	  }; }
+	  function _get(target, property, receiver) {
+	    if (typeof Reflect !== "undefined" && Reflect.get) {
+	      _get = Reflect.get;
+	    } else {
+	      _get = function _get(target, property, receiver) {
+	        var base = _superPropBase(target, property);
 
-	  return compose;
-	}
+	        if (!base) return;
+	        var desc = Object.getOwnPropertyDescriptor(base, property);
 
-	function rotationIdentity(lambda, phi) {
-	  return [abs$2(lambda) > pi ? lambda + Math.round(-lambda / tau) * tau : lambda, phi];
-	}
+	        if (desc.get) {
+	          return desc.get.call(receiver);
+	        }
 
-	rotationIdentity.invert = rotationIdentity;
+	        return desc.value;
+	      };
+	    }
 
-	function rotateRadians(deltaLambda, deltaPhi, deltaGamma) {
-	  return (deltaLambda %= tau) ? (deltaPhi || deltaGamma ? compose(rotationLambda(deltaLambda), rotationPhiGamma(deltaPhi, deltaGamma))
-	    : rotationLambda(deltaLambda))
-	    : (deltaPhi || deltaGamma ? rotationPhiGamma(deltaPhi, deltaGamma)
-	    : rotationIdentity);
-	}
-
-	function forwardRotationLambda(deltaLambda) {
-	  return function(lambda, phi) {
-	    return lambda += deltaLambda, [lambda > pi ? lambda - tau : lambda < -pi ? lambda + tau : lambda, phi];
-	  };
-	}
-
-	function rotationLambda(deltaLambda) {
-	  var rotation = forwardRotationLambda(deltaLambda);
-	  rotation.invert = forwardRotationLambda(-deltaLambda);
-	  return rotation;
-	}
-
-	function rotationPhiGamma(deltaPhi, deltaGamma) {
-	  var cosDeltaPhi = cos(deltaPhi),
-	      sinDeltaPhi = sin(deltaPhi),
-	      cosDeltaGamma = cos(deltaGamma),
-	      sinDeltaGamma = sin(deltaGamma);
-
-	  function rotation(lambda, phi) {
-	    var cosPhi = cos(phi),
-	        x = cos(lambda) * cosPhi,
-	        y = sin(lambda) * cosPhi,
-	        z = sin(phi),
-	        k = z * cosDeltaPhi + x * sinDeltaPhi;
-	    return [
-	      atan2(y * cosDeltaGamma - k * sinDeltaGamma, x * cosDeltaPhi - z * sinDeltaPhi),
-	      asin(k * cosDeltaGamma + y * sinDeltaGamma)
-	    ];
-	  }
-
-	  rotation.invert = function(lambda, phi) {
-	    var cosPhi = cos(phi),
-	        x = cos(lambda) * cosPhi,
-	        y = sin(lambda) * cosPhi,
-	        z = sin(phi),
-	        k = z * cosDeltaGamma - y * sinDeltaGamma;
-	    return [
-	      atan2(y * cosDeltaGamma + z * sinDeltaGamma, x * cosDeltaPhi + k * sinDeltaPhi),
-	      asin(k * cosDeltaPhi - x * sinDeltaPhi)
-	    ];
-	  };
-
-	  return rotation;
-	}
-
-	function rotation(rotate) {
-	  rotate = rotateRadians(rotate[0] * radians, rotate[1] * radians, rotate.length > 2 ? rotate[2] * radians : 0);
-
-	  function forward(coordinates) {
-	    coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians);
-	    return coordinates[0] *= degrees, coordinates[1] *= degrees, coordinates;
-	  }
-
-	  forward.invert = function(coordinates) {
-	    coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians);
-	    return coordinates[0] *= degrees, coordinates[1] *= degrees, coordinates;
-	  };
-
-	  return forward;
-	}
-
-	// Generates a circle centered at [0°, 0°], with a given radius and precision.
-	function circleStream(stream, radius, delta, direction, t0, t1) {
-	  if (!delta) { return; }
-	  var cosRadius = cos(radius),
-	      sinRadius = sin(radius),
-	      step = direction * delta;
-	  if (t0 == null) {
-	    t0 = radius + direction * tau;
-	    t1 = radius - step / 2;
-	  } else {
-	    t0 = circleRadius(cosRadius, t0);
-	    t1 = circleRadius(cosRadius, t1);
-	    if (direction > 0 ? t0 < t1 : t0 > t1) { t0 += direction * tau; }
-	  }
-	  for (var point, t = t0; direction > 0 ? t > t1 : t < t1; t -= step) {
-	    point = spherical([cosRadius, -sinRadius * cos(t), -sinRadius * sin(t)]);
-	    stream.point(point[0], point[1]);
+	    return _get(target, property, receiver || target);
 	  }
-	}
 
-	// Returns the signed angle of a cartesian point relative to [cosRadius, 0, 0].
-	function circleRadius(cosRadius, point) {
-	  point = cartesian(point), point[0] -= cosRadius;
-	  cartesianNormalizeInPlace(point);
-	  var radius = acos(-point[1]);
-	  return ((-point[2] < 0 ? -radius : radius) + tau - epsilon) % tau;
-	}
+	  var Emitter = /*#__PURE__*/function () {
+	    function Emitter() {
+	      _classCallCheck(this, Emitter);
 
-	function clipBuffer() {
-	  var lines = [],
-	      line;
-	  return {
-	    point: function(x, y, m) {
-	      line.push([x, y, m]);
-	    },
-	    lineStart: function() {
-	      lines.push(line = []);
-	    },
-	    lineEnd: noop$2,
-	    rejoin: function() {
-	      if (lines.length > 1) { lines.push(lines.pop().concat(lines.shift())); }
-	    },
-	    result: function() {
-	      var result = lines;
-	      lines = [];
-	      line = null;
-	      return result;
+	      Object.defineProperty(this, 'listeners', {
+	        value: {},
+	        writable: true,
+	        configurable: true
+	      });
 	    }
-	  };
-	}
-
-	function pointEqual(a, b) {
-	  return abs$2(a[0] - b[0]) < epsilon && abs$2(a[1] - b[1]) < epsilon;
-	}
-
-	function Intersection(point, points, other, entry) {
-	  this.x = point;
-	  this.z = points;
-	  this.o = other; // another intersection
-	  this.e = entry; // is an entry?
-	  this.v = false; // visited
-	  this.n = this.p = null; // next & previous
-	}
-
-	// A generalized polygon clipping algorithm: given a polygon that has been cut
-	// into its visible line segments, and rejoins the segments by interpolating
-	// along the clip edge.
-	function clipRejoin(segments, compareIntersection, startInside, interpolate, stream) {
-	  var subject = [],
-	      clip = [],
-	      i,
-	      n;
 
-	  segments.forEach(function(segment) {
-	    if ((n = segment.length - 1) <= 0) { return; }
-	    var n, p0 = segment[0], p1 = segment[n], x;
+	    _createClass(Emitter, [{
+	      key: "addEventListener",
+	      value: function addEventListener(type, callback, options) {
+	        if (!(type in this.listeners)) {
+	          this.listeners[type] = [];
+	        }
 
-	    if (pointEqual(p0, p1)) {
-	      if (!p0[2] && !p1[2]) {
-	        stream.lineStart();
-	        for (i = 0; i < n; ++i) { stream.point((p0 = segment[i])[0], p0[1]); }
-	        stream.lineEnd();
-	        return;
+	        this.listeners[type].push({
+	          callback: callback,
+	          options: options
+	        });
 	      }
-	      // handle degenerate cases by moving the point
-	      p1[0] += 2 * epsilon;
-	    }
+	    }, {
+	      key: "removeEventListener",
+	      value: function removeEventListener(type, callback) {
+	        if (!(type in this.listeners)) {
+	          return;
+	        }
 
-	    subject.push(x = new Intersection(p0, segment, null, true));
-	    clip.push(x.o = new Intersection(p0, null, x, false));
-	    subject.push(x = new Intersection(p1, segment, null, false));
-	    clip.push(x.o = new Intersection(p1, null, x, true));
-	  });
+	        var stack = this.listeners[type];
 
-	  if (!subject.length) { return; }
+	        for (var i = 0, l = stack.length; i < l; i++) {
+	          if (stack[i].callback === callback) {
+	            stack.splice(i, 1);
+	            return;
+	          }
+	        }
+	      }
+	    }, {
+	      key: "dispatchEvent",
+	      value: function dispatchEvent(event) {
+	        if (!(event.type in this.listeners)) {
+	          return;
+	        }
 
-	  clip.sort(compareIntersection);
-	  link(subject);
-	  link(clip);
+	        var stack = this.listeners[event.type];
+	        var stackToCall = stack.slice();
 
-	  for (i = 0, n = clip.length; i < n; ++i) {
-	    clip[i].e = startInside = !startInside;
-	  }
+	        for (var i = 0, l = stackToCall.length; i < l; i++) {
+	          var listener = stackToCall[i];
 
-	  var start = subject[0],
-	      points,
-	      point;
+	          try {
+	            listener.callback.call(this, event);
+	          } catch (e) {
+	            Promise.resolve().then(function () {
+	              throw e;
+	            });
+	          }
 
-	  while (1) {
-	    // Find first unvisited intersection.
-	    var current = start,
-	        isSubject = true;
-	    while (current.v) { if ((current = current.n) === start) { return; } }
-	    points = current.z;
-	    stream.lineStart();
-	    do {
-	      current.v = current.o.v = true;
-	      if (current.e) {
-	        if (isSubject) {
-	          for (i = 0, n = points.length; i < n; ++i) { stream.point((point = points[i])[0], point[1]); }
-	        } else {
-	          interpolate(current.x, current.n.x, 1, stream);
-	        }
-	        current = current.n;
-	      } else {
-	        if (isSubject) {
-	          points = current.p.z;
-	          for (i = points.length - 1; i >= 0; --i) { stream.point((point = points[i])[0], point[1]); }
-	        } else {
-	          interpolate(current.x, current.p.x, -1, stream);
+	          if (listener.options && listener.options.once) {
+	            this.removeEventListener(event.type, listener.callback);
+	          }
 	        }
-	        current = current.p;
+
+	        return !event.defaultPrevented;
 	      }
-	      current = current.o;
-	      points = current.z;
-	      isSubject = !isSubject;
-	    } while (!current.v);
-	    stream.lineEnd();
-	  }
-	}
+	    }]);
 
-	function link(array) {
-	  if (!(n = array.length)) { return; }
-	  var n,
-	      i = 0,
-	      a = array[0],
-	      b;
-	  while (++i < n) {
-	    a.n = b = array[i];
-	    b.p = a;
-	    a = b;
-	  }
-	  a.n = b = array[0];
-	  b.p = a;
-	}
+	    return Emitter;
+	  }();
 
-	var sum = adder();
+	  var AbortSignal = /*#__PURE__*/function (_Emitter) {
+	    _inherits(AbortSignal, _Emitter);
 
-	function longitude(point) {
-	  if (abs$2(point[0]) <= pi)
-	    { return point[0]; }
-	  else
-	    { return sign$2(point[0]) * ((abs$2(point[0]) + pi) % tau - pi); }
-	}
+	    var _super = _createSuper(AbortSignal);
 
-	function polygonContains(polygon, point) {
-	  var lambda = longitude(point),
-	      phi = point[1],
-	      sinPhi = sin(phi),
-	      normal = [sin(lambda), -cos(lambda), 0],
-	      angle = 0,
-	      winding = 0;
+	    function AbortSignal() {
+	      var _this;
 
-	  sum.reset();
+	      _classCallCheck(this, AbortSignal);
 
-	  if (sinPhi === 1) { phi = halfPi + epsilon; }
-	  else if (sinPhi === -1) { phi = -halfPi - epsilon; }
+	      _this = _super.call(this); // Some versions of babel does not transpile super() correctly for IE <= 10, if the parent
+	      // constructor has failed to run, then "this.listeners" will still be undefined and then we call
+	      // the parent constructor directly instead as a workaround. For general details, see babel bug:
+	      // https://github.com/babel/babel/issues/3041
+	      // This hack was added as a fix for the issue described here:
+	      // https://github.com/Financial-Times/polyfill-library/pull/59#issuecomment-477558042
 
-	  for (var i = 0, n = polygon.length; i < n; ++i) {
-	    if (!(m = (ring = polygon[i]).length)) { continue; }
-	    var ring,
-	        m,
-	        point0 = ring[m - 1],
-	        lambda0 = longitude(point0),
-	        phi0 = point0[1] / 2 + quarterPi,
-	        sinPhi0 = sin(phi0),
-	        cosPhi0 = cos(phi0);
+	      if (!_this.listeners) {
+	        Emitter.call(_assertThisInitialized(_this));
+	      } // Compared to assignment, Object.defineProperty makes properties non-enumerable by default and
+	      // we want Object.keys(new AbortController().signal) to be [] for compat with the native impl
 
-	    for (var j = 0; j < m; ++j, lambda0 = lambda1, sinPhi0 = sinPhi1, cosPhi0 = cosPhi1, point0 = point1) {
-	      var point1 = ring[j],
-	          lambda1 = longitude(point1),
-	          phi1 = point1[1] / 2 + quarterPi,
-	          sinPhi1 = sin(phi1),
-	          cosPhi1 = cos(phi1),
-	          delta = lambda1 - lambda0,
-	          sign = delta >= 0 ? 1 : -1,
-	          absDelta = sign * delta,
-	          antimeridian = absDelta > pi,
-	          k = sinPhi0 * sinPhi1;
 
-	      sum.add(atan2(k * sign * sin(absDelta), cosPhi0 * cosPhi1 + k * cos(absDelta)));
-	      angle += antimeridian ? delta + sign * tau : delta;
+	      Object.defineProperty(_assertThisInitialized(_this), 'aborted', {
+	        value: false,
+	        writable: true,
+	        configurable: true
+	      });
+	      Object.defineProperty(_assertThisInitialized(_this), 'onabort', {
+	        value: null,
+	        writable: true,
+	        configurable: true
+	      });
+	      return _this;
+	    }
 
-	      // Are the longitudes either side of the point’s meridian (lambda),
-	      // and are the latitudes smaller than the parallel (phi)?
-	      if (antimeridian ^ lambda0 >= lambda ^ lambda1 >= lambda) {
-	        var arc = cartesianCross(cartesian(point0), cartesian(point1));
-	        cartesianNormalizeInPlace(arc);
-	        var intersection = cartesianCross(normal, arc);
-	        cartesianNormalizeInPlace(intersection);
-	        var phiArc = (antimeridian ^ delta >= 0 ? -1 : 1) * asin(intersection[2]);
-	        if (phi > phiArc || phi === phiArc && (arc[0] || arc[1])) {
-	          winding += antimeridian ^ delta >= 0 ? 1 : -1;
+	    _createClass(AbortSignal, [{
+	      key: "toString",
+	      value: function toString() {
+	        return '[object AbortSignal]';
+	      }
+	    }, {
+	      key: "dispatchEvent",
+	      value: function dispatchEvent(event) {
+	        if (event.type === 'abort') {
+	          this.aborted = true;
+
+	          if (typeof this.onabort === 'function') {
+	            this.onabort.call(this, event);
+	          }
 	        }
+
+	        _get(_getPrototypeOf(AbortSignal.prototype), "dispatchEvent", this).call(this, event);
 	      }
-	    }
-	  }
+	    }]);
 
-	  // First, determine whether the South pole is inside or outside:
-	  //
-	  // It is inside if:
-	  // * the polygon winds around it in a clockwise direction.
-	  // * the polygon does not (cumulatively) wind around it, but has a negative
-	  //   (counter-clockwise) area.
-	  //
-	  // Second, count the (signed) number of times a segment crosses a lambda
-	  // from the point to the South pole.  If it is zero, then the point is the
-	  // same side as the South pole.
+	    return AbortSignal;
+	  }(Emitter);
 
-	  return (angle < -epsilon || angle < epsilon && sum < -epsilon) ^ (winding & 1);
-	}
+	  var AbortController = /*#__PURE__*/function () {
+	    function AbortController() {
+	      _classCallCheck(this, AbortController); // Compared to assignment, Object.defineProperty makes properties non-enumerable by default and
+	      // we want Object.keys(new AbortController()) to be [] for compat with the native impl
 
-	function d3_ascending(a, b) {
-	  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
-	}
 
-	function d3_bisector(compare) {
-	  if (compare.length === 1) { compare = ascendingComparator(compare); }
-	  return {
-	    left: function(a, x, lo, hi) {
-	      if (lo == null) { lo = 0; }
-	      if (hi == null) { hi = a.length; }
-	      while (lo < hi) {
-	        var mid = lo + hi >>> 1;
-	        if (compare(a[mid], x) < 0) { lo = mid + 1; }
-	        else { hi = mid; }
-	      }
-	      return lo;
-	    },
-	    right: function(a, x, lo, hi) {
-	      if (lo == null) { lo = 0; }
-	      if (hi == null) { hi = a.length; }
-	      while (lo < hi) {
-	        var mid = lo + hi >>> 1;
-	        if (compare(a[mid], x) > 0) { hi = mid; }
-	        else { lo = mid + 1; }
-	      }
-	      return lo;
+	      Object.defineProperty(this, 'signal', {
+	        value: new AbortSignal(),
+	        writable: true,
+	        configurable: true
+	      });
 	    }
-	  };
-	}
 
-	function ascendingComparator(f) {
-	  return function(d, x) {
-	    return d3_ascending(f(d), x);
-	  };
-	}
+	    _createClass(AbortController, [{
+	      key: "abort",
+	      value: function abort() {
+	        var event;
 
-	var ascendingBisect = d3_bisector(d3_ascending);
-	var bisectRight = ascendingBisect.right;
+	        try {
+	          event = new Event('abort');
+	        } catch (e) {
+	          if (typeof document !== 'undefined') {
+	            if (!document.createEvent) {
+	              // For Internet Explorer 8:
+	              event = document.createEventObject();
+	              event.type = 'abort';
+	            } else {
+	              // For Internet Explorer 11:
+	              event = document.createEvent('Event');
+	              event.initEvent('abort', false, false);
+	            }
+	          } else {
+	            // Fallback where document isn't available:
+	            event = {
+	              type: 'abort',
+	              bubbles: false,
+	              cancelable: false
+	            };
+	          }
+	        }
 
-	function d3_descending(a, b) {
-	  return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
-	}
+	        this.signal.dispatchEvent(event);
+	      }
+	    }, {
+	      key: "toString",
+	      value: function toString() {
+	        return '[object AbortController]';
+	      }
+	    }]);
 
-	function number(x) {
-	  return x === null ? NaN : +x;
-	}
+	    return AbortController;
+	  }();
 
-	function range$1(start, stop, step) {
-	  start = +start, stop = +stop, step = (n = arguments.length) < 2 ? (stop = start, start = 0, 1) : n < 3 ? 1 : +step;
+	  if (typeof Symbol !== 'undefined' && Symbol.toStringTag) {
+	    // These are necessary to make sure that we get correct output for:
+	    // Object.prototype.toString.call(new AbortController())
+	    AbortController.prototype[Symbol.toStringTag] = 'AbortController';
+	    AbortSignal.prototype[Symbol.toStringTag] = 'AbortSignal';
+	  }
 
-	  var i = -1,
-	      n = Math.max(0, Math.ceil((stop - start) / step)) | 0,
-	      range = new Array(n);
+	  function polyfillNeeded(self) {
+	    if (self.__FORCE_INSTALL_ABORTCONTROLLER_POLYFILL) {
+	      console.log('__FORCE_INSTALL_ABORTCONTROLLER_POLYFILL=true is set, will force install polyfill');
+	      return true;
+	    } // Note that the "unfetch" minimal fetch polyfill defines fetch() without
+	    // defining window.Request, and this polyfill need to work on top of unfetch
+	    // so the below feature detection needs the !self.AbortController part.
+	    // The Request.prototype check is also needed because Safari versions 11.1.2
+	    // up to and including 12.1.x has a window.AbortController present but still
+	    // does NOT correctly implement abortable fetch:
+	    // https://bugs.webkit.org/show_bug.cgi?id=174980#c2
 
-	  while (++i < n) {
-	    range[i] = start + i * step;
+
+	    return typeof self.Request === 'function' && !self.Request.prototype.hasOwnProperty('signal') || !self.AbortController;
 	  }
+	  /**
+	   * Note: the "fetch.Request" default value is available for fetch imported from
+	   * the "node-fetch" package and not in browsers. This is OK since browsers
+	   * will be importing umd-polyfill.js from that path "self" is passed the
+	   * decorator so the default value will not be used (because browsers that define
+	   * fetch also has Request). One quirky setup where self.fetch exists but
+	   * self.Request does not is when the "unfetch" minimal fetch polyfill is used
+	   * on top of IE11; for this case the browser will try to use the fetch.Request
+	   * default value which in turn will be undefined but then then "if (Request)"
+	   * will ensure that you get a patched fetch but still no Request (as expected).
+	   * @param {fetch, Request = fetch.Request}
+	   * @returns {fetch: abortableFetch, Request: AbortableRequest}
+	   */
 
-	  return range;
-	}
 
-	var e10 = Math.sqrt(50),
-	    e5 = Math.sqrt(10),
-	    e2 = Math.sqrt(2);
+	  function abortableFetchDecorator(patchTargets) {
+	    if ('function' === typeof patchTargets) {
+	      patchTargets = {
+	        fetch: patchTargets
+	      };
+	    }
 
-	function ticks(start, stop, count) {
-	  var reverse,
-	      i = -1,
-	      n,
-	      ticks,
-	      step;
+	    var _patchTargets = patchTargets,
+	        fetch = _patchTargets.fetch,
+	        _patchTargets$Request = _patchTargets.Request,
+	        NativeRequest = _patchTargets$Request === void 0 ? fetch.Request : _patchTargets$Request,
+	        NativeAbortController = _patchTargets.AbortController,
+	        _patchTargets$__FORCE = _patchTargets.__FORCE_INSTALL_ABORTCONTROLLER_POLYFILL,
+	        __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL = _patchTargets$__FORCE === void 0 ? false : _patchTargets$__FORCE;
 
-	  stop = +stop, start = +start, count = +count;
-	  if (start === stop && count > 0) { return [start]; }
-	  if (reverse = stop < start) { n = start, start = stop, stop = n; }
-	  if ((step = tickIncrement(start, stop, count)) === 0 || !isFinite(step)) { return []; }
+	    if (!polyfillNeeded({
+	      fetch: fetch,
+	      Request: NativeRequest,
+	      AbortController: NativeAbortController,
+	      __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL: __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL
+	    })) {
+	      return {
+	        fetch: fetch,
+	        Request: Request
+	      };
+	    }
 
-	  if (step > 0) {
-	    start = Math.ceil(start / step);
-	    stop = Math.floor(stop / step);
-	    ticks = new Array(n = Math.ceil(stop - start + 1));
-	    while (++i < n) { ticks[i] = (start + i) * step; }
-	  } else {
-	    start = Math.floor(start * step);
-	    stop = Math.ceil(stop * step);
-	    ticks = new Array(n = Math.ceil(start - stop + 1));
-	    while (++i < n) { ticks[i] = (start - i) / step; }
-	  }
+	    var Request = NativeRequest; // Note that the "unfetch" minimal fetch polyfill defines fetch() without
+	    // defining window.Request, and this polyfill need to work on top of unfetch
+	    // hence we only patch it if it's available. Also we don't patch it if signal
+	    // is already available on the Request prototype because in this case support
+	    // is present and the patching below can cause a crash since it assigns to
+	    // request.signal which is technically a read-only property. This latter error
+	    // happens when you run the main5.js node-fetch example in the repo
+	    // "abortcontroller-polyfill-examples". The exact error is:
+	    //   request.signal = init.signal;
+	    //   ^
+	    // TypeError: Cannot set property signal of #<Request> which has only a getter
 
-	  if (reverse) { ticks.reverse(); }
+	    if (Request && !Request.prototype.hasOwnProperty('signal') || __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL) {
+	      Request = function Request(input, init) {
+	        var signal;
 
-	  return ticks;
-	}
+	        if (init && init.signal) {
+	          signal = init.signal; // Never pass init.signal to the native Request implementation when the polyfill has
+	          // been installed because if we're running on top of a browser with a
+	          // working native AbortController (i.e. the polyfill was installed due to
+	          // __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL being set), then passing our
+	          // fake AbortSignal to the native fetch will trigger:
+	          // TypeError: Failed to construct 'Request': member signal is not of type AbortSignal.
 
-	function tickIncrement(start, stop, count) {
-	  var step = (stop - start) / Math.max(0, count),
-	      power = Math.floor(Math.log(step) / Math.LN10),
-	      error = step / Math.pow(10, power);
-	  return power >= 0
-	      ? (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1) * Math.pow(10, power)
-	      : -Math.pow(10, -power) / (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1);
-	}
+	          delete init.signal;
+	        }
 
-	function tickStep(start, stop, count) {
-	  var step0 = Math.abs(stop - start) / Math.max(0, count),
-	      step1 = Math.pow(10, Math.floor(Math.log(step0) / Math.LN10)),
-	      error = step0 / step1;
-	  if (error >= e10) { step1 *= 10; }
-	  else if (error >= e5) { step1 *= 5; }
-	  else if (error >= e2) { step1 *= 2; }
-	  return stop < start ? -step1 : step1;
-	}
+	        var request = new NativeRequest(input, init);
 
-	function threshold(values, p, valueof) {
-	  if (valueof == null) { valueof = number; }
-	  if (!(n = values.length)) { return; }
-	  if ((p = +p) <= 0 || n < 2) { return +valueof(values[0], 0, values); }
-	  if (p >= 1) { return +valueof(values[n - 1], n - 1, values); }
-	  var n,
-	      i = (n - 1) * p,
-	      i0 = Math.floor(i),
-	      value0 = +valueof(values[i0], i0, values),
-	      value1 = +valueof(values[i0 + 1], i0 + 1, values);
-	  return value0 + (value1 - value0) * (i - i0);
-	}
+	        if (signal) {
+	          Object.defineProperty(request, 'signal', {
+	            writable: false,
+	            enumerable: false,
+	            configurable: true,
+	            value: signal
+	          });
+	        }
 
-	function d3_median(values, valueof) {
-	  var n = values.length,
-	      i = -1,
-	      value,
-	      numbers = [];
+	        return request;
+	      };
 
-	  if (valueof == null) {
-	    while (++i < n) {
-	      if (!isNaN(value = number(values[i]))) {
-	        numbers.push(value);
-	      }
+	      Request.prototype = NativeRequest.prototype;
 	    }
-	  }
 
-	  else {
-	    while (++i < n) {
-	      if (!isNaN(value = number(valueof(values[i], i, values)))) {
-	        numbers.push(value);
-	      }
-	    }
-	  }
+	    var realFetch = fetch;
 
-	  return threshold(numbers.sort(d3_ascending), 0.5);
-	}
+	    var abortableFetch = function abortableFetch(input, init) {
+	      var signal = Request && Request.prototype.isPrototypeOf(input) ? input.signal : init ? init.signal : undefined;
 
-	function merge(arrays) {
-	  var n = arrays.length,
-	      m,
-	      i = -1,
-	      j = 0,
-	      merged,
-	      array;
+	      if (signal) {
+	        var abortError;
 
-	  while (++i < n) { j += arrays[i].length; }
-	  merged = new Array(j);
+	        try {
+	          abortError = new DOMException('Aborted', 'AbortError');
+	        } catch (err) {
+	          // IE 11 does not support calling the DOMException constructor, use a
+	          // regular error object on it instead.
+	          abortError = new Error('Aborted');
+	          abortError.name = 'AbortError';
+	        } // Return early if already aborted, thus avoiding making an HTTP request
 
-	  while (--n >= 0) {
-	    array = arrays[n];
-	    m = array.length;
-	    while (--m >= 0) {
-	      merged[--j] = array[m];
-	    }
-	  }
 
-	  return merged;
-	}
+	        if (signal.aborted) {
+	          return Promise.reject(abortError);
+	        } // Turn an event into a promise, reject it once `abort` is dispatched
 
-	function clip(pointVisible, clipLine, interpolate, start) {
-	  return function(sink) {
-	    var line = clipLine(sink),
-	        ringBuffer = clipBuffer(),
-	        ringSink = clipLine(ringBuffer),
-	        polygonStarted = false,
-	        polygon,
-	        segments,
-	        ring;
 
-	    var clip = {
-	      point: point,
-	      lineStart: lineStart,
-	      lineEnd: lineEnd,
-	      polygonStart: function() {
-	        clip.point = pointRing;
-	        clip.lineStart = ringStart;
-	        clip.lineEnd = ringEnd;
-	        segments = [];
-	        polygon = [];
-	      },
-	      polygonEnd: function() {
-	        clip.point = point;
-	        clip.lineStart = lineStart;
-	        clip.lineEnd = lineEnd;
-	        segments = merge(segments);
-	        var startInside = polygonContains(polygon, start);
-	        if (segments.length) {
-	          if (!polygonStarted) { sink.polygonStart(), polygonStarted = true; }
-	          clipRejoin(segments, compareIntersection, startInside, interpolate, sink);
-	        } else if (startInside) {
-	          if (!polygonStarted) { sink.polygonStart(), polygonStarted = true; }
-	          sink.lineStart();
-	          interpolate(null, null, 1, sink);
-	          sink.lineEnd();
-	        }
-	        if (polygonStarted) { sink.polygonEnd(), polygonStarted = false; }
-	        segments = polygon = null;
-	      },
-	      sphere: function() {
-	        sink.polygonStart();
-	        sink.lineStart();
-	        interpolate(null, null, 1, sink);
-	        sink.lineEnd();
-	        sink.polygonEnd();
+	        var cancellation = new Promise(function (_, reject) {
+	          signal.addEventListener('abort', function () {
+	            return reject(abortError);
+	          }, {
+	            once: true
+	          });
+	        });
+
+	        if (init && init.signal) {
+	          // Never pass .signal to the native implementation when the polyfill has
+	          // been installed because if we're running on top of a browser with a
+	          // working native AbortController (i.e. the polyfill was installed due to
+	          // __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL being set), then passing our
+	          // fake AbortSignal to the native fetch will trigger:
+	          // TypeError: Failed to execute 'fetch' on 'Window': member signal is not of type AbortSignal.
+	          delete init.signal;
+	        } // Return the fastest promise (don't need to wait for request to finish)
+
+
+	        return Promise.race([cancellation, realFetch(input, init)]);
 	      }
+
+	      return realFetch(input, init);
 	    };
 
-	    function point(lambda, phi) {
-	      if (pointVisible(lambda, phi)) { sink.point(lambda, phi); }
-	    }
+	    return {
+	      fetch: abortableFetch,
+	      Request: Request
+	    };
+	  }
 
-	    function pointLine(lambda, phi) {
-	      line.point(lambda, phi);
+	  (function (self) {
+	    if (!polyfillNeeded(self)) {
+	      return;
 	    }
 
-	    function lineStart() {
-	      clip.point = pointLine;
-	      line.lineStart();
+	    if (!self.fetch) {
+	      console.warn('fetch() is not available, cannot install abortcontroller-polyfill');
+	      return;
 	    }
 
-	    function lineEnd() {
-	      clip.point = point;
-	      line.lineEnd();
-	    }
+	    var _abortableFetch = abortableFetchDecorator(self),
+	        fetch = _abortableFetch.fetch,
+	        Request = _abortableFetch.Request;
 
-	    function pointRing(lambda, phi) {
-	      ring.push([lambda, phi]);
-	      ringSink.point(lambda, phi);
-	    }
+	    self.fetch = fetch;
+	    self.Request = Request;
+	    Object.defineProperty(self, 'AbortController', {
+	      writable: true,
+	      enumerable: false,
+	      configurable: true,
+	      value: AbortController
+	    });
+	    Object.defineProperty(self, 'AbortSignal', {
+	      writable: true,
+	      enumerable: false,
+	      configurable: true,
+	      value: AbortSignal
+	    });
+	  })(typeof self !== 'undefined' ? self : commonjsGlobal);
+	});
 
-	    function ringStart() {
-	      ringSink.lineStart();
-	      ring = [];
+	function actionAddEntity(way) {
+	  return function (graph) {
+	    return graph.replace(way);
+	  };
+	}
+
+	var $$E = _export;
+	var fails$f = fails$N;
+	var isArray$1 = isArray$6;
+	var isObject$7 = isObject$r;
+	var toObject$3 = toObject$i;
+	var toLength$5 = toLength$q;
+	var createProperty = createProperty$4;
+	var arraySpeciesCreate = arraySpeciesCreate$3;
+	var arrayMethodHasSpeciesSupport$1 = arrayMethodHasSpeciesSupport$5;
+	var wellKnownSymbol$2 = wellKnownSymbol$s;
+	var V8_VERSION = engineV8Version;
+
+	var IS_CONCAT_SPREADABLE = wellKnownSymbol$2('isConcatSpreadable');
+	var MAX_SAFE_INTEGER = 0x1FFFFFFFFFFFFF;
+	var MAXIMUM_ALLOWED_INDEX_EXCEEDED = 'Maximum allowed index exceeded';
+
+	// We can't use this feature detection in V8 since it causes
+	// deoptimization and serious performance degradation
+	// https://github.com/zloirock/core-js/issues/679
+	var IS_CONCAT_SPREADABLE_SUPPORT = V8_VERSION >= 51 || !fails$f(function () {
+	  var array = [];
+	  array[IS_CONCAT_SPREADABLE] = false;
+	  return array.concat()[0] !== array;
+	});
+
+	var SPECIES_SUPPORT = arrayMethodHasSpeciesSupport$1('concat');
+
+	var isConcatSpreadable = function (O) {
+	  if (!isObject$7(O)) return false;
+	  var spreadable = O[IS_CONCAT_SPREADABLE];
+	  return spreadable !== undefined ? !!spreadable : isArray$1(O);
+	};
+
+	var FORCED$8 = !IS_CONCAT_SPREADABLE_SUPPORT || !SPECIES_SUPPORT;
+
+	// `Array.prototype.concat` method
+	// https://tc39.es/ecma262/#sec-array.prototype.concat
+	// with adding support of @@isConcatSpreadable and @@species
+	$$E({ target: 'Array', proto: true, forced: FORCED$8 }, {
+	  // eslint-disable-next-line no-unused-vars -- required for `.length`
+	  concat: function concat(arg) {
+	    var O = toObject$3(this);
+	    var A = arraySpeciesCreate(O, 0);
+	    var n = 0;
+	    var i, k, length, len, E;
+	    for (i = -1, length = arguments.length; i < length; i++) {
+	      E = i === -1 ? O : arguments[i];
+	      if (isConcatSpreadable(E)) {
+	        len = toLength$5(E.length);
+	        if (n + len > MAX_SAFE_INTEGER) throw TypeError(MAXIMUM_ALLOWED_INDEX_EXCEEDED);
+	        for (k = 0; k < len; k++, n++) if (k in E) createProperty(A, n, E[k]);
+	      } else {
+	        if (n >= MAX_SAFE_INTEGER) throw TypeError(MAXIMUM_ALLOWED_INDEX_EXCEEDED);
+	        createProperty(A, n++, E);
+	      }
 	    }
+	    A.length = n;
+	    return A;
+	  }
+	});
 
-	    function ringEnd() {
-	      pointRing(ring[0][0], ring[0][1]);
-	      ringSink.lineEnd();
+	var $$D = _export;
+	var assign$1 = objectAssign;
 
-	      var clean = ringSink.clean(),
-	          ringSegments = ringBuffer.result(),
-	          i, n = ringSegments.length, m,
-	          segment,
-	          point;
+	// `Object.assign` method
+	// https://tc39.es/ecma262/#sec-object.assign
+	// eslint-disable-next-line es/no-object-assign -- required for testing
+	$$D({ target: 'Object', stat: true, forced: Object.assign !== assign$1 }, {
+	  assign: assign$1
+	});
 
-	      ring.pop();
-	      polygon.push(ring);
-	      ring = null;
+	var $$C = _export;
+	var $filter = arrayIteration.filter;
+	var arrayMethodHasSpeciesSupport = arrayMethodHasSpeciesSupport$5;
 
-	      if (!n) { return; }
+	var HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('filter');
 
-	      // No intersections.
-	      if (clean & 1) {
-	        segment = ringSegments[0];
-	        if ((m = segment.length - 1) > 0) {
-	          if (!polygonStarted) { sink.polygonStart(), polygonStarted = true; }
-	          sink.lineStart();
-	          for (i = 0; i < m; ++i) { sink.point((point = segment[i])[0], point[1]); }
-	          sink.lineEnd();
-	        }
-	        return;
-	      }
+	// `Array.prototype.filter` method
+	// https://tc39.es/ecma262/#sec-array.prototype.filter
+	// with adding support of @@species
+	$$C({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT }, {
+	  filter: function filter(callbackfn /* , thisArg */) {
+	    return $filter(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
 
-	      // Rejoin connected segments.
-	      // TODO reuse ringBuffer.rejoin()?
-	      if (n > 1 && clean & 2) { ringSegments.push(ringSegments.pop().concat(ringSegments.shift())); }
+	var $$B = _export;
+	var toObject$2 = toObject$i;
+	var nativeKeys = objectKeys$4;
+	var fails$e = fails$N;
 
-	      segments.push(ringSegments.filter(validSegment));
-	    }
+	var FAILS_ON_PRIMITIVES$1 = fails$e(function () { nativeKeys(1); });
 
-	    return clip;
-	  };
-	}
+	// `Object.keys` method
+	// https://tc39.es/ecma262/#sec-object.keys
+	$$B({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$1 }, {
+	  keys: function keys(it) {
+	    return nativeKeys(toObject$2(it));
+	  }
+	});
 
-	function validSegment(segment) {
-	  return segment.length > 1;
-	}
+	var $$A = _export;
+	var isArray = isArray$6;
 
-	// Intersections are sorted along the clip edge. For both antimeridian cutting
-	// and circle clipping, the same comparison is used.
-	function compareIntersection(a, b) {
-	  return ((a = a.x)[0] < 0 ? a[1] - halfPi - epsilon : halfPi - a[1])
-	       - ((b = b.x)[0] < 0 ? b[1] - halfPi - epsilon : halfPi - b[1]);
-	}
+	var nativeReverse = [].reverse;
+	var test$1 = [1, 2];
 
-	var clipAntimeridian = clip(
-	  function() { return true; },
-	  clipAntimeridianLine,
-	  clipAntimeridianInterpolate,
-	  [-pi, -halfPi]
-	);
+	// `Array.prototype.reverse` method
+	// https://tc39.es/ecma262/#sec-array.prototype.reverse
+	// fix for Safari 12.0 bug
+	// https://bugs.webkit.org/show_bug.cgi?id=188794
+	$$A({ target: 'Array', proto: true, forced: String(test$1) === String(test$1.reverse()) }, {
+	  reverse: function reverse() {
+	    // eslint-disable-next-line no-self-assign -- dirty hack
+	    if (isArray(this)) this.length = this.length;
+	    return nativeReverse.call(this);
+	  }
+	});
 
-	// Takes a line and cuts into visible segments. Return values: 0 - there were
-	// intersections or the line was empty; 1 - no intersections; 2 - there were
-	// intersections, and the first and last segments should be rejoined.
-	function clipAntimeridianLine(stream) {
-	  var lambda0 = NaN,
-	      phi0 = NaN,
-	      sign0 = NaN,
-	      clean; // no intersections
+	var global$6 = global$F;
+	var trim$4 = stringTrim.trim;
+	var whitespaces$1 = whitespaces$4;
 
-	  return {
-	    lineStart: function() {
-	      stream.lineStart();
-	      clean = 1;
-	    },
-	    point: function(lambda1, phi1) {
-	      var sign1 = lambda1 > 0 ? pi : -pi,
-	          delta = abs$2(lambda1 - lambda0);
-	      if (abs$2(delta - pi) < epsilon) { // line crosses a pole
-	        stream.point(lambda0, phi0 = (phi0 + phi1) / 2 > 0 ? halfPi : -halfPi);
-	        stream.point(sign0, phi0);
-	        stream.lineEnd();
-	        stream.lineStart();
-	        stream.point(sign1, phi0);
-	        stream.point(lambda1, phi0);
-	        clean = 0;
-	      } else if (sign0 !== sign1 && delta >= pi) { // line crosses antimeridian
-	        if (abs$2(lambda0 - sign0) < epsilon) { lambda0 -= sign0 * epsilon; } // handle degeneracies
-	        if (abs$2(lambda1 - sign1) < epsilon) { lambda1 -= sign1 * epsilon; }
-	        phi0 = clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1);
-	        stream.point(sign0, phi0);
-	        stream.lineEnd();
-	        stream.lineStart();
-	        stream.point(sign1, phi0);
-	        clean = 0;
-	      }
-	      stream.point(lambda0 = lambda1, phi0 = phi1);
-	      sign0 = sign1;
-	    },
-	    lineEnd: function() {
-	      stream.lineEnd();
-	      lambda0 = phi0 = NaN;
-	    },
-	    clean: function() {
-	      return 2 - clean; // if intersections, rejoin first and last segments
-	    }
-	  };
-	}
+	var $parseFloat = global$6.parseFloat;
+	var FORCED$7 = 1 / $parseFloat(whitespaces$1 + '-0') !== -Infinity;
 
-	function clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1) {
-	  var cosPhi0,
-	      cosPhi1,
-	      sinLambda0Lambda1 = sin(lambda0 - lambda1);
-	  return abs$2(sinLambda0Lambda1) > epsilon
-	      ? atan((sin(phi0) * (cosPhi1 = cos(phi1)) * sin(lambda1)
-	          - sin(phi1) * (cosPhi0 = cos(phi0)) * sin(lambda0))
-	          / (cosPhi0 * cosPhi1 * sinLambda0Lambda1))
-	      : (phi0 + phi1) / 2;
-	}
+	// `parseFloat` method
+	// https://tc39.es/ecma262/#sec-parsefloat-string
+	var numberParseFloat = FORCED$7 ? function parseFloat(string) {
+	  var trimmedString = trim$4(String(string));
+	  var result = $parseFloat(trimmedString);
+	  return result === 0 && trimmedString.charAt(0) == '-' ? -0 : result;
+	} : $parseFloat;
 
-	function clipAntimeridianInterpolate(from, to, direction, stream) {
-	  var phi;
-	  if (from == null) {
-	    phi = direction * halfPi;
-	    stream.point(-pi, phi);
-	    stream.point(0, phi);
-	    stream.point(pi, phi);
-	    stream.point(pi, 0);
-	    stream.point(pi, -phi);
-	    stream.point(0, -phi);
-	    stream.point(-pi, -phi);
-	    stream.point(-pi, 0);
-	    stream.point(-pi, phi);
-	  } else if (abs$2(from[0] - to[0]) > epsilon) {
-	    var lambda = from[0] < to[0] ? pi : -pi;
-	    phi = direction * lambda / 2;
-	    stream.point(-lambda, phi);
-	    stream.point(0, phi);
-	    stream.point(lambda, phi);
-	  } else {
-	    stream.point(to[0], to[1]);
-	  }
-	}
+	var $$z = _export;
+	var parseFloatImplementation = numberParseFloat;
 
-	function clipCircle(radius) {
-	  var cr = cos(radius),
-	      delta = 6 * radians,
-	      smallRadius = cr > 0,
-	      notHemisphere = abs$2(cr) > epsilon; // TODO optimise for this common case
+	// `parseFloat` method
+	// https://tc39.es/ecma262/#sec-parsefloat-string
+	$$z({ global: true, forced: parseFloat != parseFloatImplementation }, {
+	  parseFloat: parseFloatImplementation
+	});
 
-	  function interpolate(from, to, direction, stream) {
-	    circleStream(stream, radius, delta, direction, from, to);
-	  }
+	/*
+	Order the nodes of a way in reverse order and reverse any direction dependent tags
+	other than `oneway`. (We assume that correcting a backwards oneway is the primary
+	reason for reversing a way.)
 
-	  function visible(lambda, phi) {
-	    return cos(lambda) * cos(phi) > cr;
+	In addition, numeric-valued `incline` tags are negated.
+
+	The JOSM implementation was used as a guide, but transformations that were of unclear benefit
+	or adjusted tags that don't seem to be used in practice were omitted.
+
+	References:
+	    http://wiki.openstreetmap.org/wiki/Forward_%26_backward,_left_%26_right
+	    http://wiki.openstreetmap.org/wiki/Key:direction#Steps
+	    http://wiki.openstreetmap.org/wiki/Key:incline
+	    http://wiki.openstreetmap.org/wiki/Route#Members
+	    http://josm.openstreetmap.de/browser/josm/trunk/src/org/openstreetmap/josm/corrector/ReverseWayTagCorrector.java
+	    http://wiki.openstreetmap.org/wiki/Tag:highway%3Dstop
+	    http://wiki.openstreetmap.org/wiki/Key:traffic_sign#On_a_way_or_area
+	*/
+	function actionReverse(entityID, options) {
+	  var ignoreKey = /^.*(_|:)?(description|name|note|website|ref|source|comment|watch|attribution)(_|:)?/;
+	  var numeric = /^([+\-]?)(?=[\d.])/;
+	  var directionKey = /direction$/;
+	  var turn_lanes = /^turn:lanes:?/;
+	  var keyReplacements = [[/:right$/, ':left'], [/:left$/, ':right'], [/:forward$/, ':backward'], [/:backward$/, ':forward'], [/:right:/, ':left:'], [/:left:/, ':right:'], [/:forward:/, ':backward:'], [/:backward:/, ':forward:']];
+	  var valueReplacements = {
+	    left: 'right',
+	    right: 'left',
+	    up: 'down',
+	    down: 'up',
+	    forward: 'backward',
+	    backward: 'forward',
+	    forwards: 'backward',
+	    backwards: 'forward'
+	  };
+	  var roleReplacements = {
+	    forward: 'backward',
+	    backward: 'forward',
+	    forwards: 'backward',
+	    backwards: 'forward'
+	  };
+	  var onewayReplacements = {
+	    yes: '-1',
+	    '1': '-1',
+	    '-1': 'yes'
+	  };
+	  var compassReplacements = {
+	    N: 'S',
+	    NNE: 'SSW',
+	    NE: 'SW',
+	    ENE: 'WSW',
+	    E: 'W',
+	    ESE: 'WNW',
+	    SE: 'NW',
+	    SSE: 'NNW',
+	    S: 'N',
+	    SSW: 'NNE',
+	    SW: 'NE',
+	    WSW: 'ENE',
+	    W: 'E',
+	    WNW: 'ESE',
+	    NW: 'SE',
+	    NNW: 'SSE'
+	  };
+
+	  function reverseKey(key) {
+	    for (var i = 0; i < keyReplacements.length; ++i) {
+	      var replacement = keyReplacements[i];
+
+	      if (replacement[0].test(key)) {
+	        return key.replace(replacement[0], replacement[1]);
+	      }
+	    }
+
+	    return key;
 	  }
 
-	  // Takes a line and cuts into visible segments. Return values used for polygon
-	  // clipping: 0 - there were intersections or the line was empty; 1 - no
-	  // intersections 2 - there were intersections, and the first and last segments
-	  // should be rejoined.
-	  function clipLine(stream) {
-	    var point0, // previous point
-	        c0, // code for previous point
-	        v0, // visibility of previous point
-	        v00, // visibility of first point
-	        clean; // no intersections
-	    return {
-	      lineStart: function() {
-	        v00 = v0 = false;
-	        clean = 1;
-	      },
-	      point: function(lambda, phi) {
-	        var point1 = [lambda, phi],
-	            point2,
-	            v = visible(lambda, phi),
-	            c = smallRadius
-	              ? v ? 0 : code(lambda, phi)
-	              : v ? code(lambda + (lambda < 0 ? pi : -pi), phi) : 0;
-	        if (!point0 && (v00 = v0 = v)) { stream.lineStart(); }
-	        if (v !== v0) {
-	          point2 = intersect(point0, point1);
-	          if (!point2 || pointEqual(point0, point2) || pointEqual(point1, point2))
-	            { point1[2] = 1; }
-	        }
-	        if (v !== v0) {
-	          clean = 0;
-	          if (v) {
-	            // outside going in
-	            stream.lineStart();
-	            point2 = intersect(point1, point0);
-	            stream.point(point2[0], point2[1]);
-	          } else {
-	            // inside going out
-	            point2 = intersect(point0, point1);
-	            stream.point(point2[0], point2[1], 2);
-	            stream.lineEnd();
-	          }
-	          point0 = point2;
-	        } else if (notHemisphere && point0 && smallRadius ^ v) {
-	          var t;
-	          // If the codes for two points are different, or are both zero,
-	          // and there this segment intersects with the small circle.
-	          if (!(c & c0) && (t = intersect(point1, point0, true))) {
-	            clean = 0;
-	            if (smallRadius) {
-	              stream.lineStart();
-	              stream.point(t[0][0], t[0][1]);
-	              stream.point(t[1][0], t[1][1]);
-	              stream.lineEnd();
-	            } else {
-	              stream.point(t[1][0], t[1][1]);
-	              stream.lineEnd();
-	              stream.lineStart();
-	              stream.point(t[0][0], t[0][1], 3);
-	            }
-	          }
-	        }
-	        if (v && (!point0 || !pointEqual(point0, point1))) {
-	          stream.point(point1[0], point1[1]);
+	  function reverseValue(key, value, includeAbsolute) {
+	    if (ignoreKey.test(key)) return value; // Turn lanes are left/right to key (not way) direction - #5674
+
+	    if (turn_lanes.test(key)) {
+	      return value;
+	    } else if (key === 'incline' && numeric.test(value)) {
+	      return value.replace(numeric, function (_, sign) {
+	        return sign === '-' ? '' : '-';
+	      });
+	    } else if (options && options.reverseOneway && key === 'oneway') {
+	      return onewayReplacements[value] || value;
+	    } else if (includeAbsolute && directionKey.test(key)) {
+	      if (compassReplacements[value]) return compassReplacements[value];
+	      var degrees = parseFloat(value);
+
+	      if (typeof degrees === 'number' && !isNaN(degrees)) {
+	        if (degrees < 180) {
+	          degrees += 180;
+	        } else {
+	          degrees -= 180;
 	        }
-	        point0 = point1, v0 = v, c0 = c;
-	      },
-	      lineEnd: function() {
-	        if (v0) { stream.lineEnd(); }
-	        point0 = null;
-	      },
-	      // Rejoin first and last segments if there were intersections and the first
-	      // and last points were visible.
-	      clean: function() {
-	        return clean | ((v00 && v0) << 1);
+
+	        return degrees.toString();
 	      }
-	    };
-	  }
+	    }
 
-	  // Intersects the great circle between a and b with the clip circle.
-	  function intersect(a, b, two) {
-	    var pa = cartesian(a),
-	        pb = cartesian(b);
+	    return valueReplacements[value] || value;
+	  } // Reverse the direction of tags attached to the nodes - #3076
 
-	    // We have two planes, n1.p = d1 and n2.p = d2.
-	    // Find intersection line p(t) = c1 n1 + c2 n2 + t (n1 ⨯ n2).
-	    var n1 = [1, 0, 0], // normal
-	        n2 = cartesianCross(pa, pb),
-	        n2n2 = cartesianDot(n2, n2),
-	        n1n2 = n2[0], // cartesianDot(n1, n2),
-	        determinant = n2n2 - n1n2 * n1n2;
 
-	    // Two polar points.
-	    if (!determinant) { return !two && a; }
+	  function reverseNodeTags(graph, nodeIDs) {
+	    for (var i = 0; i < nodeIDs.length; i++) {
+	      var node = graph.hasEntity(nodeIDs[i]);
+	      if (!node || !Object.keys(node.tags).length) continue;
+	      var tags = {};
 
-	    var c1 =  cr * n2n2 / determinant,
-	        c2 = -cr * n1n2 / determinant,
-	        n1xn2 = cartesianCross(n1, n2),
-	        A = cartesianScale(n1, c1),
-	        B = cartesianScale(n2, c2);
-	    cartesianAddInPlace(A, B);
+	      for (var key in node.tags) {
+	        tags[reverseKey(key)] = reverseValue(key, node.tags[key], node.id === entityID);
+	      }
 
-	    // Solve |p(t)|^2 = 1.
-	    var u = n1xn2,
-	        w = cartesianDot(A, u),
-	        uu = cartesianDot(u, u),
-	        t2 = w * w - uu * (cartesianDot(A, A) - 1);
+	      graph = graph.replace(node.update({
+	        tags: tags
+	      }));
+	    }
 
-	    if (t2 < 0) { return; }
+	    return graph;
+	  }
 
-	    var t = sqrt(t2),
-	        q = cartesianScale(u, (-w - t) / uu);
-	    cartesianAddInPlace(q, A);
-	    q = spherical(q);
+	  function reverseWay(graph, way) {
+	    var nodes = way.nodes.slice().reverse();
+	    var tags = {};
+	    var role;
 
-	    if (!two) { return q; }
+	    for (var key in way.tags) {
+	      tags[reverseKey(key)] = reverseValue(key, way.tags[key]);
+	    }
 
-	    // Two intersection points.
-	    var lambda0 = a[0],
-	        lambda1 = b[0],
-	        phi0 = a[1],
-	        phi1 = b[1],
-	        z;
+	    graph.parentRelations(way).forEach(function (relation) {
+	      relation.members.forEach(function (member, index) {
+	        if (member.id === way.id && (role = roleReplacements[member.role])) {
+	          relation = relation.updateMember({
+	            role: role
+	          }, index);
+	          graph = graph.replace(relation);
+	        }
+	      });
+	    }); // Reverse any associated directions on nodes on the way and then replace
+	    // the way itself with the reversed node ids and updated way tags
 
-	    if (lambda1 < lambda0) { z = lambda0, lambda0 = lambda1, lambda1 = z; }
+	    return reverseNodeTags(graph, nodes).replace(way.update({
+	      nodes: nodes,
+	      tags: tags
+	    }));
+	  }
 
-	    var delta = lambda1 - lambda0,
-	        polar = abs$2(delta - pi) < epsilon,
-	        meridian = polar || delta < epsilon;
+	  var action = function action(graph) {
+	    var entity = graph.entity(entityID);
 
-	    if (!polar && phi1 < phi0) { z = phi0, phi0 = phi1, phi1 = z; }
+	    if (entity.type === 'way') {
+	      return reverseWay(graph, entity);
+	    }
 
-	    // Check that the first point is between a and b.
-	    if (meridian
-	        ? polar
-	          ? phi0 + phi1 > 0 ^ q[1] < (abs$2(q[0] - lambda0) < epsilon ? phi0 : phi1)
-	          : phi0 <= q[1] && q[1] <= phi1
-	        : delta > pi ^ (lambda0 <= q[0] && q[0] <= lambda1)) {
-	      var q1 = cartesianScale(u, (-w + t) / uu);
-	      cartesianAddInPlace(q1, A);
-	      return [q, spherical(q1)];
+	    return reverseNodeTags(graph, [entityID]);
+	  };
+
+	  action.disabled = function (graph) {
+	    var entity = graph.hasEntity(entityID);
+	    if (!entity || entity.type === 'way') return false;
+
+	    for (var key in entity.tags) {
+	      var value = entity.tags[key];
+
+	      if (reverseKey(key) !== key || reverseValue(key, value, true) !== value) {
+	        return false;
+	      }
 	    }
-	  }
 
-	  // Generates a 4-bit vector representing the location of a point relative to
-	  // the small circle's bounding box.
-	  function code(lambda, phi) {
-	    var r = smallRadius ? radius : pi - radius,
-	        code = 0;
-	    if (lambda < -r) { code |= 1; } // left
-	    else if (lambda > r) { code |= 2; } // right
-	    if (phi < -r) { code |= 4; } // below
-	    else if (phi > r) { code |= 8; } // above
-	    return code;
-	  }
+	    return 'nondirectional_node';
+	  };
 
-	  return clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-pi, radius - pi]);
+	  action.entityID = function () {
+	    return entityID;
+	  };
+
+	  return action;
 	}
 
-	function clipLine(a, b, x0, y0, x1, y1) {
-	  var ax = a[0],
-	      ay = a[1],
-	      bx = b[0],
-	      by = b[1],
-	      t0 = 0,
-	      t1 = 1,
-	      dx = bx - ax,
-	      dy = by - ay,
-	      r;
+	function osmIsInterestingTag(key) {
+	  return key !== 'attribution' && key !== 'created_by' && key !== 'source' && key !== 'odbl' && key.indexOf('source:') !== 0 && key.indexOf('source_ref') !== 0 && // purposely exclude colon
+	  key.indexOf('tiger:') !== 0;
+	}
+	var osmAreaKeys = {};
+	function osmSetAreaKeys(value) {
+	  osmAreaKeys = value;
+	} // returns an object with the tag from `tags` that implies an area geometry, if any
 
-	  r = x0 - ax;
-	  if (!dx && r > 0) { return; }
-	  r /= dx;
-	  if (dx < 0) {
-	    if (r < t0) { return; }
-	    if (r < t1) { t1 = r; }
-	  } else if (dx > 0) {
-	    if (r > t1) { return; }
-	    if (r > t0) { t0 = r; }
-	  }
+	function osmTagSuggestingArea(tags) {
+	  if (tags.area === 'yes') return {
+	    area: 'yes'
+	  };
+	  if (tags.area === 'no') return null; // `highway` and `railway` are typically linear features, but there
+	  // are a few exceptions that should be treated as areas, even in the
+	  // absence of a proper `area=yes` or `areaKeys` tag.. see #4194
 
-	  r = x1 - ax;
-	  if (!dx && r < 0) { return; }
-	  r /= dx;
-	  if (dx < 0) {
-	    if (r > t1) { return; }
-	    if (r > t0) { t0 = r; }
-	  } else if (dx > 0) {
-	    if (r < t0) { return; }
-	    if (r < t1) { t1 = r; }
-	  }
+	  var lineKeys = {
+	    highway: {
+	      rest_area: true,
+	      services: true
+	    },
+	    railway: {
+	      roundhouse: true,
+	      station: true,
+	      traverser: true,
+	      turntable: true,
+	      wash: true
+	    }
+	  };
+	  var returnTags = {};
 
-	  r = y0 - ay;
-	  if (!dy && r > 0) { return; }
-	  r /= dy;
-	  if (dy < 0) {
-	    if (r < t0) { return; }
-	    if (r < t1) { t1 = r; }
-	  } else if (dy > 0) {
-	    if (r > t1) { return; }
-	    if (r > t0) { t0 = r; }
-	  }
+	  for (var key in tags) {
+	    if (key in osmAreaKeys && !(tags[key] in osmAreaKeys[key])) {
+	      returnTags[key] = tags[key];
+	      return returnTags;
+	    }
 
-	  r = y1 - ay;
-	  if (!dy && r < 0) { return; }
-	  r /= dy;
-	  if (dy < 0) {
-	    if (r > t1) { return; }
-	    if (r > t0) { t0 = r; }
-	  } else if (dy > 0) {
-	    if (r < t0) { return; }
-	    if (r < t1) { t1 = r; }
+	    if (key in lineKeys && tags[key] in lineKeys[key]) {
+	      returnTags[key] = tags[key];
+	      return returnTags;
+	    }
 	  }
 
-	  if (t0 > 0) { a[0] = ax + t0 * dx, a[1] = ay + t0 * dy; }
-	  if (t1 < 1) { b[0] = ax + t1 * dx, b[1] = ay + t1 * dy; }
-	  return true;
+	  return null;
+	} // Tags that indicate a node can be a standalone point
+	// e.g. { amenity: { bar: true, parking: true, ... } ... }
+
+	var osmPointTags = {};
+	function osmSetPointTags(value) {
+	  osmPointTags = value;
+	} // Tags that indicate a node can be part of a way
+	// e.g. { amenity: { parking: true, ... }, highway: { stop: true ... } ... }
+
+	var osmVertexTags = {};
+	function osmSetVertexTags(value) {
+	  osmVertexTags = value;
 	}
+	function osmNodeGeometriesForTags(nodeTags) {
+	  var geometries = {};
 
-	var clipMax = 1e9, clipMin = -clipMax;
+	  for (var key in nodeTags) {
+	    if (osmPointTags[key] && (osmPointTags[key]['*'] || osmPointTags[key][nodeTags[key]])) {
+	      geometries.point = true;
+	    }
 
-	// TODO Use d3-polygon’s polygonContains here for the ring check?
-	// TODO Eliminate duplicate buffering in clipBuffer and polygon.push?
+	    if (osmVertexTags[key] && (osmVertexTags[key]['*'] || osmVertexTags[key][nodeTags[key]])) {
+	      geometries.vertex = true;
+	    } // break early if both are already supported
 
-	function clipRectangle(x0, y0, x1, y1) {
 
-	  function visible(x, y) {
-	    return x0 <= x && x <= x1 && y0 <= y && y <= y1;
+	    if (geometries.point && geometries.vertex) break;
 	  }
 
-	  function interpolate(from, to, direction, stream) {
-	    var a = 0, a1 = 0;
-	    if (from == null
-	        || (a = corner(from, direction)) !== (a1 = corner(to, direction))
-	        || comparePoint(from, to) < 0 ^ direction > 0) {
-	      do { stream.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0); }
-	      while ((a = (a + direction + 4) % 4) !== a1);
-	    } else {
-	      stream.point(to[0], to[1]);
-	    }
+	  return geometries;
+	}
+	var osmOneWayTags = {
+	  'aerialway': {
+	    'chair_lift': true,
+	    'drag_lift': true,
+	    'j-bar': true,
+	    'magic_carpet': true,
+	    'mixed_lift': true,
+	    'platter': true,
+	    'rope_tow': true,
+	    't-bar': true,
+	    'zip_line': true
+	  },
+	  'highway': {
+	    'motorway': true
+	  },
+	  'junction': {
+	    'circular': true,
+	    'roundabout': true
+	  },
+	  'man_made': {
+	    'goods_conveyor': true,
+	    'piste:halfpipe': true
+	  },
+	  'piste:type': {
+	    'downhill': true,
+	    'sled': true,
+	    'yes': true
+	  },
+	  'waterway': {
+	    'canal': true,
+	    'ditch': true,
+	    'drain': true,
+	    'fish_pass': true,
+	    'river': true,
+	    'stream': true,
+	    'tidal_channel': true
 	  }
+	}; // solid and smooth surfaces akin to the assumed default road surface in OSM
 
-	  function corner(p, direction) {
-	    return abs$2(p[0] - x0) < epsilon ? direction > 0 ? 0 : 3
-	        : abs$2(p[0] - x1) < epsilon ? direction > 0 ? 2 : 1
-	        : abs$2(p[1] - y0) < epsilon ? direction > 0 ? 1 : 0
-	        : direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon
+	var osmPavedTags = {
+	  'surface': {
+	    'paved': true,
+	    'asphalt': true,
+	    'concrete': true,
+	    'concrete:lanes': true,
+	    'concrete:plates': true
+	  },
+	  'tracktype': {
+	    'grade1': true
 	  }
+	}; // solid, if somewhat uncommon surfaces with a high range of smoothness
 
-	  function compareIntersection(a, b) {
-	    return comparePoint(a.x, b.x);
+	var osmSemipavedTags = {
+	  'surface': {
+	    'cobblestone': true,
+	    'cobblestone:flattened': true,
+	    'unhewn_cobblestone': true,
+	    'sett': true,
+	    'paving_stones': true,
+	    'metal': true,
+	    'wood': true
 	  }
-
-	  function comparePoint(a, b) {
-	    var ca = corner(a, 1),
-	        cb = corner(b, 1);
-	    return ca !== cb ? ca - cb
-	        : ca === 0 ? b[1] - a[1]
-	        : ca === 1 ? a[0] - b[0]
-	        : ca === 2 ? a[1] - b[1]
-	        : b[0] - a[0];
+	};
+	var osmRightSideIsInsideTags = {
+	  'natural': {
+	    'cliff': true,
+	    'coastline': 'coastline'
+	  },
+	  'barrier': {
+	    'retaining_wall': true,
+	    'kerb': true,
+	    'guard_rail': true,
+	    'city_wall': true
+	  },
+	  'man_made': {
+	    'embankment': true
+	  },
+	  'waterway': {
+	    'weir': true
 	  }
+	}; // "highway" tag values for pedestrian or vehicle right-of-ways that make up the routable network
+	// (does not include `raceway`)
 
-	  return function(stream) {
-	    var activeStream = stream,
-	        bufferStream = clipBuffer(),
-	        segments,
-	        polygon,
-	        ring,
-	        x__, y__, v__, // first point
-	        x_, y_, v_, // previous point
-	        first,
-	        clean;
+	var osmRoutableHighwayTagValues = {
+	  motorway: true,
+	  trunk: true,
+	  primary: true,
+	  secondary: true,
+	  tertiary: true,
+	  residential: true,
+	  motorway_link: true,
+	  trunk_link: true,
+	  primary_link: true,
+	  secondary_link: true,
+	  tertiary_link: true,
+	  unclassified: true,
+	  road: true,
+	  service: true,
+	  track: true,
+	  living_street: true,
+	  bus_guideway: true,
+	  path: true,
+	  footway: true,
+	  cycleway: true,
+	  bridleway: true,
+	  pedestrian: true,
+	  corridor: true,
+	  steps: true
+	}; // "highway" tag values that generally do not allow motor vehicles
 
-	    var clipStream = {
-	      point: point,
-	      lineStart: lineStart,
-	      lineEnd: lineEnd,
-	      polygonStart: polygonStart,
-	      polygonEnd: polygonEnd
-	    };
+	var osmPathHighwayTagValues = {
+	  path: true,
+	  footway: true,
+	  cycleway: true,
+	  bridleway: true,
+	  pedestrian: true,
+	  corridor: true,
+	  steps: true
+	}; // "railway" tag values representing existing railroad tracks (purposely does not include 'abandoned')
 
-	    function point(x, y) {
-	      if (visible(x, y)) { activeStream.point(x, y); }
-	    }
+	var osmRailwayTrackTagValues = {
+	  rail: true,
+	  light_rail: true,
+	  tram: true,
+	  subway: true,
+	  monorail: true,
+	  funicular: true,
+	  miniature: true,
+	  narrow_gauge: true,
+	  disused: true,
+	  preserved: true
+	}; // "waterway" tag values for line features representing water flow
 
-	    function polygonInside() {
-	      var winding = 0;
+	var osmFlowingWaterwayTagValues = {
+	  canal: true,
+	  ditch: true,
+	  drain: true,
+	  fish_pass: true,
+	  river: true,
+	  stream: true,
+	  tidal_channel: true
+	};
+
+	var global$5 = global$F;
+	var trim$3 = stringTrim.trim;
+	var whitespaces = whitespaces$4;
+
+	var $parseInt = global$5.parseInt;
+	var hex$2 = /^[+-]?0[Xx]/;
+	var FORCED$6 = $parseInt(whitespaces + '08') !== 8 || $parseInt(whitespaces + '0x16') !== 22;
+
+	// `parseInt` method
+	// https://tc39.es/ecma262/#sec-parseint-string-radix
+	var numberParseInt = FORCED$6 ? function parseInt(string, radix) {
+	  var S = trim$3(String(string));
+	  return $parseInt(S, (radix >>> 0) || (hex$2.test(S) ? 16 : 10));
+	} : $parseInt;
+
+	var $$y = _export;
+	var parseIntImplementation = numberParseInt;
+
+	// `parseInt` method
+	// https://tc39.es/ecma262/#sec-parseint-string-radix
+	$$y({ global: true, forced: parseInt != parseIntImplementation }, {
+	  parseInt: parseIntImplementation
+	});
 
-	      for (var i = 0, n = polygon.length; i < n; ++i) {
-	        for (var ring = polygon[i], j = 1, m = ring.length, point = ring[0], a0, a1, b0 = point[0], b1 = point[1]; j < m; ++j) {
-	          a0 = b0, a1 = b1, point = ring[j], b0 = point[0], b1 = point[1];
-	          if (a1 <= y1) { if (b1 > y1 && (b0 - a0) * (y1 - a1) > (b1 - a1) * (x0 - a0)) { ++winding; } }
-	          else { if (b1 <= y1 && (b0 - a0) * (y1 - a1) < (b1 - a1) * (x0 - a0)) { --winding; } }
-	        }
-	      }
+	var internalMetadata = {exports: {}};
 
-	      return winding;
-	    }
+	var fails$d = fails$N;
 
-	    // Buffer geometry within a polygon and then clip it en masse.
-	    function polygonStart() {
-	      activeStream = bufferStream, segments = [], polygon = [], clean = true;
-	    }
+	var freezing = !fails$d(function () {
+	  // eslint-disable-next-line es/no-object-isextensible, es/no-object-preventextensions -- required for testing
+	  return Object.isExtensible(Object.preventExtensions({}));
+	});
 
-	    function polygonEnd() {
-	      var startInside = polygonInside(),
-	          cleanInside = clean && startInside,
-	          visible = (segments = merge(segments)).length;
-	      if (cleanInside || visible) {
-	        stream.polygonStart();
-	        if (cleanInside) {
-	          stream.lineStart();
-	          interpolate(null, null, 1, stream);
-	          stream.lineEnd();
-	        }
-	        if (visible) {
-	          clipRejoin(segments, compareIntersection, startInside, interpolate, stream);
-	        }
-	        stream.polygonEnd();
+	var hiddenKeys = hiddenKeys$6;
+	var isObject$6 = isObject$r;
+	var has$2 = has$j;
+	var defineProperty$3 = objectDefineProperty.f;
+	var uid = uid$5;
+	var FREEZING$1 = freezing;
+
+	var METADATA = uid('meta');
+	var id$1 = 0;
+
+	// eslint-disable-next-line es/no-object-isextensible -- safe
+	var isExtensible = Object.isExtensible || function () {
+	  return true;
+	};
+
+	var setMetadata = function (it) {
+	  defineProperty$3(it, METADATA, { value: {
+	    objectID: 'O' + ++id$1, // object ID
+	    weakData: {}          // weak collections IDs
+	  } });
+	};
+
+	var fastKey$1 = function (it, create) {
+	  // return a primitive with prefix
+	  if (!isObject$6(it)) return typeof it == 'symbol' ? it : (typeof it == 'string' ? 'S' : 'P') + it;
+	  if (!has$2(it, METADATA)) {
+	    // can't set metadata to uncaught frozen object
+	    if (!isExtensible(it)) return 'F';
+	    // not necessary to add metadata
+	    if (!create) return 'E';
+	    // add missing metadata
+	    setMetadata(it);
+	  // return object ID
+	  } return it[METADATA].objectID;
+	};
+
+	var getWeakData = function (it, create) {
+	  if (!has$2(it, METADATA)) {
+	    // can't set metadata to uncaught frozen object
+	    if (!isExtensible(it)) return true;
+	    // not necessary to add metadata
+	    if (!create) return false;
+	    // add missing metadata
+	    setMetadata(it);
+	  // return the store of weak collections IDs
+	  } return it[METADATA].weakData;
+	};
+
+	// add metadata on freeze-family methods calling
+	var onFreeze$1 = function (it) {
+	  if (FREEZING$1 && meta.REQUIRED && isExtensible(it) && !has$2(it, METADATA)) setMetadata(it);
+	  return it;
+	};
+
+	var meta = internalMetadata.exports = {
+	  REQUIRED: false,
+	  fastKey: fastKey$1,
+	  getWeakData: getWeakData,
+	  onFreeze: onFreeze$1
+	};
+
+	hiddenKeys[METADATA] = true;
+
+	var $$x = _export;
+	var global$4 = global$F;
+	var isForced$2 = isForced_1;
+	var redefine$3 = redefine$g.exports;
+	var InternalMetadataModule = internalMetadata.exports;
+	var iterate$1 = iterate$3;
+	var anInstance$1 = anInstance$7;
+	var isObject$5 = isObject$r;
+	var fails$c = fails$N;
+	var checkCorrectnessOfIteration$1 = checkCorrectnessOfIteration$4;
+	var setToStringTag = setToStringTag$a;
+	var inheritIfRequired$2 = inheritIfRequired$4;
+
+	var collection$2 = function (CONSTRUCTOR_NAME, wrapper, common) {
+	  var IS_MAP = CONSTRUCTOR_NAME.indexOf('Map') !== -1;
+	  var IS_WEAK = CONSTRUCTOR_NAME.indexOf('Weak') !== -1;
+	  var ADDER = IS_MAP ? 'set' : 'add';
+	  var NativeConstructor = global$4[CONSTRUCTOR_NAME];
+	  var NativePrototype = NativeConstructor && NativeConstructor.prototype;
+	  var Constructor = NativeConstructor;
+	  var exported = {};
+
+	  var fixMethod = function (KEY) {
+	    var nativeMethod = NativePrototype[KEY];
+	    redefine$3(NativePrototype, KEY,
+	      KEY == 'add' ? function add(value) {
+	        nativeMethod.call(this, value === 0 ? 0 : value);
+	        return this;
+	      } : KEY == 'delete' ? function (key) {
+	        return IS_WEAK && !isObject$5(key) ? false : nativeMethod.call(this, key === 0 ? 0 : key);
+	      } : KEY == 'get' ? function get(key) {
+	        return IS_WEAK && !isObject$5(key) ? undefined : nativeMethod.call(this, key === 0 ? 0 : key);
+	      } : KEY == 'has' ? function has(key) {
+	        return IS_WEAK && !isObject$5(key) ? false : nativeMethod.call(this, key === 0 ? 0 : key);
+	      } : function set(key, value) {
+	        nativeMethod.call(this, key === 0 ? 0 : key, value);
+	        return this;
 	      }
-	      activeStream = stream, segments = polygon = ring = null;
-	    }
+	    );
+	  };
 
-	    function lineStart() {
-	      clipStream.point = linePoint;
-	      if (polygon) { polygon.push(ring = []); }
-	      first = true;
-	      v_ = false;
-	      x_ = y_ = NaN;
+	  var REPLACE = isForced$2(
+	    CONSTRUCTOR_NAME,
+	    typeof NativeConstructor != 'function' || !(IS_WEAK || NativePrototype.forEach && !fails$c(function () {
+	      new NativeConstructor().entries().next();
+	    }))
+	  );
+
+	  if (REPLACE) {
+	    // create collection constructor
+	    Constructor = common.getConstructor(wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER);
+	    InternalMetadataModule.REQUIRED = true;
+	  } else if (isForced$2(CONSTRUCTOR_NAME, true)) {
+	    var instance = new Constructor();
+	    // early implementations not supports chaining
+	    var HASNT_CHAINING = instance[ADDER](IS_WEAK ? {} : -0, 1) != instance;
+	    // V8 ~ Chromium 40- weak-collections throws on primitives, but should return false
+	    var THROWS_ON_PRIMITIVES = fails$c(function () { instance.has(1); });
+	    // most early implementations doesn't supports iterables, most modern - not close it correctly
+	    // eslint-disable-next-line no-new -- required for testing
+	    var ACCEPT_ITERABLES = checkCorrectnessOfIteration$1(function (iterable) { new NativeConstructor(iterable); });
+	    // for early implementations -0 and +0 not the same
+	    var BUGGY_ZERO = !IS_WEAK && fails$c(function () {
+	      // V8 ~ Chromium 42- fails only with 5+ elements
+	      var $instance = new NativeConstructor();
+	      var index = 5;
+	      while (index--) $instance[ADDER](index, index);
+	      return !$instance.has(-0);
+	    });
+
+	    if (!ACCEPT_ITERABLES) {
+	      Constructor = wrapper(function (dummy, iterable) {
+	        anInstance$1(dummy, Constructor, CONSTRUCTOR_NAME);
+	        var that = inheritIfRequired$2(new NativeConstructor(), dummy, Constructor);
+	        if (iterable != undefined) iterate$1(iterable, that[ADDER], { that: that, AS_ENTRIES: IS_MAP });
+	        return that;
+	      });
+	      Constructor.prototype = NativePrototype;
+	      NativePrototype.constructor = Constructor;
 	    }
 
-	    // TODO rather than special-case polygons, simply handle them separately.
-	    // Ideally, coincident intersection points should be jittered to avoid
-	    // clipping issues.
-	    function lineEnd() {
-	      if (segments) {
-	        linePoint(x__, y__);
-	        if (v__ && v_) { bufferStream.rejoin(); }
-	        segments.push(bufferStream.result());
-	      }
-	      clipStream.point = point;
-	      if (v_) { activeStream.lineEnd(); }
+	    if (THROWS_ON_PRIMITIVES || BUGGY_ZERO) {
+	      fixMethod('delete');
+	      fixMethod('has');
+	      IS_MAP && fixMethod('get');
 	    }
 
-	    function linePoint(x, y) {
-	      var v = visible(x, y);
-	      if (polygon) { ring.push([x, y]); }
-	      if (first) {
-	        x__ = x, y__ = y, v__ = v;
-	        first = false;
-	        if (v) {
-	          activeStream.lineStart();
-	          activeStream.point(x, y);
-	        }
-	      } else {
-	        if (v && v_) { activeStream.point(x, y); }
-	        else {
-	          var a = [x_ = Math.max(clipMin, Math.min(clipMax, x_)), y_ = Math.max(clipMin, Math.min(clipMax, y_))],
-	              b = [x = Math.max(clipMin, Math.min(clipMax, x)), y = Math.max(clipMin, Math.min(clipMax, y))];
-	          if (clipLine(a, b, x0, y0, x1, y1)) {
-	            if (!v_) {
-	              activeStream.lineStart();
-	              activeStream.point(a[0], a[1]);
-	            }
-	            activeStream.point(b[0], b[1]);
-	            if (!v) { activeStream.lineEnd(); }
-	            clean = false;
-	          } else if (v) {
-	            activeStream.lineStart();
-	            activeStream.point(x, y);
-	            clean = false;
-	          }
-	        }
-	      }
-	      x_ = x, y_ = y, v_ = v;
-	    }
+	    if (BUGGY_ZERO || HASNT_CHAINING) fixMethod(ADDER);
 
-	    return clipStream;
-	  };
-	}
+	    // weak collections should not contains .clear method
+	    if (IS_WEAK && NativePrototype.clear) delete NativePrototype.clear;
+	  }
 
-	var lengthSum = adder(),
-	    lambda0$2,
-	    sinPhi0$1,
-	    cosPhi0$1;
+	  exported[CONSTRUCTOR_NAME] = Constructor;
+	  $$x({ global: true, forced: Constructor != NativeConstructor }, exported);
 
-	var lengthStream = {
-	  sphere: noop$2,
-	  point: noop$2,
-	  lineStart: lengthLineStart,
-	  lineEnd: noop$2,
-	  polygonStart: noop$2,
-	  polygonEnd: noop$2
-	};
+	  setToStringTag(Constructor, CONSTRUCTOR_NAME);
 
-	function lengthLineStart() {
-	  lengthStream.point = lengthPointFirst;
-	  lengthStream.lineEnd = lengthLineEnd;
-	}
+	  if (!IS_WEAK) common.setStrong(Constructor, CONSTRUCTOR_NAME, IS_MAP);
 
-	function lengthLineEnd() {
-	  lengthStream.point = lengthStream.lineEnd = noop$2;
-	}
+	  return Constructor;
+	};
 
-	function lengthPointFirst(lambda, phi) {
-	  lambda *= radians, phi *= radians;
-	  lambda0$2 = lambda, sinPhi0$1 = sin(phi), cosPhi0$1 = cos(phi);
-	  lengthStream.point = lengthPoint;
-	}
+	var defineProperty$2 = objectDefineProperty.f;
+	var create$4 = objectCreate;
+	var redefineAll = redefineAll$4;
+	var bind$3 = functionBindContext;
+	var anInstance = anInstance$7;
+	var iterate = iterate$3;
+	var defineIterator = defineIterator$3;
+	var setSpecies$1 = setSpecies$5;
+	var DESCRIPTORS$5 = descriptors;
+	var fastKey = internalMetadata.exports.fastKey;
+	var InternalStateModule = internalState;
 
-	function lengthPoint(lambda, phi) {
-	  lambda *= radians, phi *= radians;
-	  var sinPhi = sin(phi),
-	      cosPhi = cos(phi),
-	      delta = abs$2(lambda - lambda0$2),
-	      cosDelta = cos(delta),
-	      sinDelta = sin(delta),
-	      x = cosPhi * sinDelta,
-	      y = cosPhi0$1 * sinPhi - sinPhi0$1 * cosPhi * cosDelta,
-	      z = sinPhi0$1 * sinPhi + cosPhi0$1 * cosPhi * cosDelta;
-	  lengthSum.add(atan2(sqrt(x * x + y * y), z));
-	  lambda0$2 = lambda, sinPhi0$1 = sinPhi, cosPhi0$1 = cosPhi;
-	}
+	var setInternalState = InternalStateModule.set;
+	var internalStateGetterFor = InternalStateModule.getterFor;
 
-	function d3_geoLength(object) {
-	  lengthSum.reset();
-	  d3_geoStream(object, lengthStream);
-	  return +lengthSum;
-	}
+	var collectionStrong$2 = {
+	  getConstructor: function (wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER) {
+	    var C = wrapper(function (that, iterable) {
+	      anInstance(that, C, CONSTRUCTOR_NAME);
+	      setInternalState(that, {
+	        type: CONSTRUCTOR_NAME,
+	        index: create$4(null),
+	        first: undefined,
+	        last: undefined,
+	        size: 0
+	      });
+	      if (!DESCRIPTORS$5) that.size = 0;
+	      if (iterable != undefined) iterate(iterable, that[ADDER], { that: that, AS_ENTRIES: IS_MAP });
+	    });
 
-	function identity(x) {
-	  return x;
-	}
+	    var getInternalState = internalStateGetterFor(CONSTRUCTOR_NAME);
 
-	var areaSum$1 = adder(),
-	    areaRingSum$1 = adder(),
-	    x00,
-	    y00,
-	    x0$1,
-	    y0$1;
+	    var define = function (that, key, value) {
+	      var state = getInternalState(that);
+	      var entry = getEntry(that, key);
+	      var previous, index;
+	      // change existing entry
+	      if (entry) {
+	        entry.value = value;
+	      // create new entry
+	      } else {
+	        state.last = entry = {
+	          index: index = fastKey(key, true),
+	          key: key,
+	          value: value,
+	          previous: previous = state.last,
+	          next: undefined,
+	          removed: false
+	        };
+	        if (!state.first) state.first = entry;
+	        if (previous) previous.next = entry;
+	        if (DESCRIPTORS$5) state.size++;
+	        else that.size++;
+	        // add to index
+	        if (index !== 'F') state.index[index] = entry;
+	      } return that;
+	    };
+
+	    var getEntry = function (that, key) {
+	      var state = getInternalState(that);
+	      // fast case
+	      var index = fastKey(key);
+	      var entry;
+	      if (index !== 'F') return state.index[index];
+	      // frozen object case
+	      for (entry = state.first; entry; entry = entry.next) {
+	        if (entry.key == key) return entry;
+	      }
+	    };
 
-	var areaStream$1 = {
-	  point: noop$2,
-	  lineStart: noop$2,
-	  lineEnd: noop$2,
-	  polygonStart: function() {
-	    areaStream$1.lineStart = areaRingStart$1;
-	    areaStream$1.lineEnd = areaRingEnd$1;
-	  },
-	  polygonEnd: function() {
-	    areaStream$1.lineStart = areaStream$1.lineEnd = areaStream$1.point = noop$2;
-	    areaSum$1.add(abs$2(areaRingSum$1));
-	    areaRingSum$1.reset();
+	    redefineAll(C.prototype, {
+	      // `{ Map, Set }.prototype.clear()` methods
+	      // https://tc39.es/ecma262/#sec-map.prototype.clear
+	      // https://tc39.es/ecma262/#sec-set.prototype.clear
+	      clear: function clear() {
+	        var that = this;
+	        var state = getInternalState(that);
+	        var data = state.index;
+	        var entry = state.first;
+	        while (entry) {
+	          entry.removed = true;
+	          if (entry.previous) entry.previous = entry.previous.next = undefined;
+	          delete data[entry.index];
+	          entry = entry.next;
+	        }
+	        state.first = state.last = undefined;
+	        if (DESCRIPTORS$5) state.size = 0;
+	        else that.size = 0;
+	      },
+	      // `{ Map, Set }.prototype.delete(key)` methods
+	      // https://tc39.es/ecma262/#sec-map.prototype.delete
+	      // https://tc39.es/ecma262/#sec-set.prototype.delete
+	      'delete': function (key) {
+	        var that = this;
+	        var state = getInternalState(that);
+	        var entry = getEntry(that, key);
+	        if (entry) {
+	          var next = entry.next;
+	          var prev = entry.previous;
+	          delete state.index[entry.index];
+	          entry.removed = true;
+	          if (prev) prev.next = next;
+	          if (next) next.previous = prev;
+	          if (state.first == entry) state.first = next;
+	          if (state.last == entry) state.last = prev;
+	          if (DESCRIPTORS$5) state.size--;
+	          else that.size--;
+	        } return !!entry;
+	      },
+	      // `{ Map, Set }.prototype.forEach(callbackfn, thisArg = undefined)` methods
+	      // https://tc39.es/ecma262/#sec-map.prototype.foreach
+	      // https://tc39.es/ecma262/#sec-set.prototype.foreach
+	      forEach: function forEach(callbackfn /* , that = undefined */) {
+	        var state = getInternalState(this);
+	        var boundFunction = bind$3(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);
+	        var entry;
+	        while (entry = entry ? entry.next : state.first) {
+	          boundFunction(entry.value, entry.key, this);
+	          // revert to the last existing entry
+	          while (entry && entry.removed) entry = entry.previous;
+	        }
+	      },
+	      // `{ Map, Set}.prototype.has(key)` methods
+	      // https://tc39.es/ecma262/#sec-map.prototype.has
+	      // https://tc39.es/ecma262/#sec-set.prototype.has
+	      has: function has(key) {
+	        return !!getEntry(this, key);
+	      }
+	    });
+
+	    redefineAll(C.prototype, IS_MAP ? {
+	      // `Map.prototype.get(key)` method
+	      // https://tc39.es/ecma262/#sec-map.prototype.get
+	      get: function get(key) {
+	        var entry = getEntry(this, key);
+	        return entry && entry.value;
+	      },
+	      // `Map.prototype.set(key, value)` method
+	      // https://tc39.es/ecma262/#sec-map.prototype.set
+	      set: function set(key, value) {
+	        return define(this, key === 0 ? 0 : key, value);
+	      }
+	    } : {
+	      // `Set.prototype.add(value)` method
+	      // https://tc39.es/ecma262/#sec-set.prototype.add
+	      add: function add(value) {
+	        return define(this, value = value === 0 ? 0 : value, value);
+	      }
+	    });
+	    if (DESCRIPTORS$5) defineProperty$2(C.prototype, 'size', {
+	      get: function () {
+	        return getInternalState(this).size;
+	      }
+	    });
+	    return C;
 	  },
-	  result: function() {
-	    var area = areaSum$1 / 2;
-	    areaSum$1.reset();
-	    return area;
+	  setStrong: function (C, CONSTRUCTOR_NAME, IS_MAP) {
+	    var ITERATOR_NAME = CONSTRUCTOR_NAME + ' Iterator';
+	    var getInternalCollectionState = internalStateGetterFor(CONSTRUCTOR_NAME);
+	    var getInternalIteratorState = internalStateGetterFor(ITERATOR_NAME);
+	    // `{ Map, Set }.prototype.{ keys, values, entries, @@iterator }()` methods
+	    // https://tc39.es/ecma262/#sec-map.prototype.entries
+	    // https://tc39.es/ecma262/#sec-map.prototype.keys
+	    // https://tc39.es/ecma262/#sec-map.prototype.values
+	    // https://tc39.es/ecma262/#sec-map.prototype-@@iterator
+	    // https://tc39.es/ecma262/#sec-set.prototype.entries
+	    // https://tc39.es/ecma262/#sec-set.prototype.keys
+	    // https://tc39.es/ecma262/#sec-set.prototype.values
+	    // https://tc39.es/ecma262/#sec-set.prototype-@@iterator
+	    defineIterator(C, CONSTRUCTOR_NAME, function (iterated, kind) {
+	      setInternalState(this, {
+	        type: ITERATOR_NAME,
+	        target: iterated,
+	        state: getInternalCollectionState(iterated),
+	        kind: kind,
+	        last: undefined
+	      });
+	    }, function () {
+	      var state = getInternalIteratorState(this);
+	      var kind = state.kind;
+	      var entry = state.last;
+	      // revert to the last existing entry
+	      while (entry && entry.removed) entry = entry.previous;
+	      // get next entry
+	      if (!state.target || !(state.last = entry = entry ? entry.next : state.state.first)) {
+	        // or finish the iteration
+	        state.target = undefined;
+	        return { value: undefined, done: true };
+	      }
+	      // return step by kind
+	      if (kind == 'keys') return { value: entry.key, done: false };
+	      if (kind == 'values') return { value: entry.value, done: false };
+	      return { value: [entry.key, entry.value], done: false };
+	    }, IS_MAP ? 'entries' : 'values', !IS_MAP, true);
+
+	    // `{ Map, Set }.prototype[@@species]` accessors
+	    // https://tc39.es/ecma262/#sec-get-map-@@species
+	    // https://tc39.es/ecma262/#sec-get-set-@@species
+	    setSpecies$1(CONSTRUCTOR_NAME);
 	  }
 	};
 
-	function areaRingStart$1() {
-	  areaStream$1.point = areaPointFirst$1;
-	}
+	var collection$1 = collection$2;
+	var collectionStrong$1 = collectionStrong$2;
 
-	function areaPointFirst$1(x, y) {
-	  areaStream$1.point = areaPoint$1;
-	  x00 = x0$1 = x, y00 = y0$1 = y;
-	}
+	// `Set` constructor
+	// https://tc39.es/ecma262/#sec-set-objects
+	collection$1('Set', function (init) {
+	  return function Set() { return init(this, arguments.length ? arguments[0] : undefined); };
+	}, collectionStrong$1);
 
-	function areaPoint$1(x, y) {
-	  areaRingSum$1.add(y0$1 * x - x0$1 * y);
-	  x0$1 = x, y0$1 = y;
+	function d3_ascending (a, b) {
+	  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
 	}
 
-	function areaRingEnd$1() {
-	  areaPoint$1(x00, y00);
-	}
+	function d3_bisector (f) {
+	  var delta = f;
+	  var compare = f;
 
-	var x0$2 = Infinity,
-	    y0$2 = x0$2,
-	    x1 = -x0$2,
-	    y1 = x1;
+	  if (f.length === 1) {
+	    delta = function delta(d, x) {
+	      return f(d) - x;
+	    };
 
-	var boundsStream$1 = {
-	  point: boundsPoint$1,
-	  lineStart: noop$2,
-	  lineEnd: noop$2,
-	  polygonStart: noop$2,
-	  polygonEnd: noop$2,
-	  result: function() {
-	    var bounds = [[x0$2, y0$2], [x1, y1]];
-	    x1 = y1 = -(y0$2 = x0$2 = Infinity);
-	    return bounds;
+	    compare = ascendingComparator(f);
 	  }
-	};
-
-	function boundsPoint$1(x, y) {
-	  if (x < x0$2) { x0$2 = x; }
-	  if (x > x1) { x1 = x; }
-	  if (y < y0$2) { y0$2 = y; }
-	  if (y > y1) { y1 = y; }
-	}
 
-	// TODO Enforce positive area for exterior, negative area for interior?
+	  function left(a, x, lo, hi) {
+	    if (lo == null) lo = 0;
+	    if (hi == null) hi = a.length;
 
-	var X0$1 = 0,
-	    Y0$1 = 0,
-	    Z0$1 = 0,
-	    X1$1 = 0,
-	    Y1$1 = 0,
-	    Z1$1 = 0,
-	    X2$1 = 0,
-	    Y2$1 = 0,
-	    Z2$1 = 0,
-	    x00$1,
-	    y00$1,
-	    x0$3,
-	    y0$3;
+	    while (lo < hi) {
+	      var mid = lo + hi >>> 1;
+	      if (compare(a[mid], x) < 0) lo = mid + 1;else hi = mid;
+	    }
 
-	var centroidStream$1 = {
-	  point: centroidPoint$1,
-	  lineStart: centroidLineStart$1,
-	  lineEnd: centroidLineEnd$1,
-	  polygonStart: function() {
-	    centroidStream$1.lineStart = centroidRingStart$1;
-	    centroidStream$1.lineEnd = centroidRingEnd$1;
-	  },
-	  polygonEnd: function() {
-	    centroidStream$1.point = centroidPoint$1;
-	    centroidStream$1.lineStart = centroidLineStart$1;
-	    centroidStream$1.lineEnd = centroidLineEnd$1;
-	  },
-	  result: function() {
-	    var centroid = Z2$1 ? [X2$1 / Z2$1, Y2$1 / Z2$1]
-	        : Z1$1 ? [X1$1 / Z1$1, Y1$1 / Z1$1]
-	        : Z0$1 ? [X0$1 / Z0$1, Y0$1 / Z0$1]
-	        : [NaN, NaN];
-	    X0$1 = Y0$1 = Z0$1 =
-	    X1$1 = Y1$1 = Z1$1 =
-	    X2$1 = Y2$1 = Z2$1 = 0;
-	    return centroid;
+	    return lo;
 	  }
-	};
 
-	function centroidPoint$1(x, y) {
-	  X0$1 += x;
-	  Y0$1 += y;
-	  ++Z0$1;
-	}
+	  function right(a, x, lo, hi) {
+	    if (lo == null) lo = 0;
+	    if (hi == null) hi = a.length;
 
-	function centroidLineStart$1() {
-	  centroidStream$1.point = centroidPointFirstLine;
-	}
+	    while (lo < hi) {
+	      var mid = lo + hi >>> 1;
+	      if (compare(a[mid], x) > 0) hi = mid;else lo = mid + 1;
+	    }
 
-	function centroidPointFirstLine(x, y) {
-	  centroidStream$1.point = centroidPointLine;
-	  centroidPoint$1(x0$3 = x, y0$3 = y);
-	}
+	    return lo;
+	  }
 
-	function centroidPointLine(x, y) {
-	  var dx = x - x0$3, dy = y - y0$3, z = sqrt(dx * dx + dy * dy);
-	  X1$1 += z * (x0$3 + x) / 2;
-	  Y1$1 += z * (y0$3 + y) / 2;
-	  Z1$1 += z;
-	  centroidPoint$1(x0$3 = x, y0$3 = y);
-	}
+	  function center(a, x, lo, hi) {
+	    if (lo == null) lo = 0;
+	    if (hi == null) hi = a.length;
+	    var i = left(a, x, lo, hi - 1);
+	    return i > lo && delta(a[i - 1], x) > -delta(a[i], x) ? i - 1 : i;
+	  }
 
-	function centroidLineEnd$1() {
-	  centroidStream$1.point = centroidPoint$1;
+	  return {
+	    left: left,
+	    center: center,
+	    right: right
+	  };
 	}
 
-	function centroidRingStart$1() {
-	  centroidStream$1.point = centroidPointFirstRing;
+	function ascendingComparator(f) {
+	  return function (d, x) {
+	    return d3_ascending(f(d), x);
+	  };
 	}
 
-	function centroidRingEnd$1() {
-	  centroidPointRing(x00$1, y00$1);
-	}
+	var defineWellKnownSymbol = defineWellKnownSymbol$4;
 
-	function centroidPointFirstRing(x, y) {
-	  centroidStream$1.point = centroidPointRing;
-	  centroidPoint$1(x00$1 = x0$3 = x, y00$1 = y0$3 = y);
-	}
+	// `Symbol.asyncIterator` well-known symbol
+	// https://tc39.es/ecma262/#sec-symbol.asynciterator
+	defineWellKnownSymbol('asyncIterator');
 
-	function centroidPointRing(x, y) {
-	  var dx = x - x0$3,
-	      dy = y - y0$3,
-	      z = sqrt(dx * dx + dy * dy);
+	var runtime = {exports: {}};
 
-	  X1$1 += z * (x0$3 + x) / 2;
-	  Y1$1 += z * (y0$3 + y) / 2;
-	  Z1$1 += z;
+	(function (module) {
+	  var runtime = function (exports) {
 
-	  z = y0$3 * x - x0$3 * y;
-	  X2$1 += z * (x0$3 + x);
-	  Y2$1 += z * (y0$3 + y);
-	  Z2$1 += z * 3;
-	  centroidPoint$1(x0$3 = x, y0$3 = y);
-	}
+	    var Op = Object.prototype;
+	    var hasOwn = Op.hasOwnProperty;
+	    var undefined$1; // More compressible than void 0.
 
-	function PathContext(context) {
-	  this._context = context;
-	}
+	    var $Symbol = typeof Symbol === "function" ? Symbol : {};
+	    var iteratorSymbol = $Symbol.iterator || "@@iterator";
+	    var asyncIteratorSymbol = $Symbol.asyncIterator || "@@asyncIterator";
+	    var toStringTagSymbol = $Symbol.toStringTag || "@@toStringTag";
 
-	PathContext.prototype = {
-	  _radius: 4.5,
-	  pointRadius: function(_) {
-	    return this._radius = _, this;
-	  },
-	  polygonStart: function() {
-	    this._line = 0;
-	  },
-	  polygonEnd: function() {
-	    this._line = NaN;
-	  },
-	  lineStart: function() {
-	    this._point = 0;
-	  },
-	  lineEnd: function() {
-	    if (this._line === 0) { this._context.closePath(); }
-	    this._point = NaN;
-	  },
-	  point: function(x, y) {
-	    switch (this._point) {
-	      case 0: {
-	        this._context.moveTo(x, y);
-	        this._point = 1;
-	        break;
-	      }
-	      case 1: {
-	        this._context.lineTo(x, y);
-	        break;
-	      }
-	      default: {
-	        this._context.moveTo(x + this._radius, y);
-	        this._context.arc(x, y, this._radius, 0, tau);
-	        break;
-	      }
+	    function define(obj, key, value) {
+	      Object.defineProperty(obj, key, {
+	        value: value,
+	        enumerable: true,
+	        configurable: true,
+	        writable: true
+	      });
+	      return obj[key];
 	    }
-	  },
-	  result: noop$2
-	};
-
-	var lengthSum$1 = adder(),
-	    lengthRing,
-	    x00$2,
-	    y00$2,
-	    x0$4,
-	    y0$4;
 
-	var lengthStream$1 = {
-	  point: noop$2,
-	  lineStart: function() {
-	    lengthStream$1.point = lengthPointFirst$1;
-	  },
-	  lineEnd: function() {
-	    if (lengthRing) { lengthPoint$1(x00$2, y00$2); }
-	    lengthStream$1.point = noop$2;
-	  },
-	  polygonStart: function() {
-	    lengthRing = true;
-	  },
-	  polygonEnd: function() {
-	    lengthRing = null;
-	  },
-	  result: function() {
-	    var length = +lengthSum$1;
-	    lengthSum$1.reset();
-	    return length;
-	  }
-	};
+	    try {
+	      // IE 8 has a broken Object.defineProperty that only works on DOM objects.
+	      define({}, "");
+	    } catch (err) {
+	      define = function define(obj, key, value) {
+	        return obj[key] = value;
+	      };
+	    }
 
-	function lengthPointFirst$1(x, y) {
-	  lengthStream$1.point = lengthPoint$1;
-	  x00$2 = x0$4 = x, y00$2 = y0$4 = y;
-	}
+	    function wrap(innerFn, outerFn, self, tryLocsList) {
+	      // If outerFn provided and outerFn.prototype is a Generator, then outerFn.prototype instanceof Generator.
+	      var protoGenerator = outerFn && outerFn.prototype instanceof Generator ? outerFn : Generator;
+	      var generator = Object.create(protoGenerator.prototype);
+	      var context = new Context(tryLocsList || []); // The ._invoke method unifies the implementations of the .next,
+	      // .throw, and .return methods.
 
-	function lengthPoint$1(x, y) {
-	  x0$4 -= x, y0$4 -= y;
-	  lengthSum$1.add(sqrt(x0$4 * x0$4 + y0$4 * y0$4));
-	  x0$4 = x, y0$4 = y;
-	}
+	      generator._invoke = makeInvokeMethod(innerFn, self, context);
+	      return generator;
+	    }
 
-	function PathString() {
-	  this._string = [];
-	}
+	    exports.wrap = wrap; // Try/catch helper to minimize deoptimizations. Returns a completion
+	    // record like context.tryEntries[i].completion. This interface could
+	    // have been (and was previously) designed to take a closure to be
+	    // invoked without arguments, but in all the cases we care about we
+	    // already have an existing method we want to call, so there's no need
+	    // to create a new function object. We can even get away with assuming
+	    // the method takes exactly one argument, since that happens to be true
+	    // in every case, so we don't have to touch the arguments object. The
+	    // only additional allocation required is the completion record, which
+	    // has a stable shape and so hopefully should be cheap to allocate.
 
-	PathString.prototype = {
-	  _radius: 4.5,
-	  _circle: circle(4.5),
-	  pointRadius: function(_) {
-	    if ((_ = +_) !== this._radius) { this._radius = _, this._circle = null; }
-	    return this;
-	  },
-	  polygonStart: function() {
-	    this._line = 0;
-	  },
-	  polygonEnd: function() {
-	    this._line = NaN;
-	  },
-	  lineStart: function() {
-	    this._point = 0;
-	  },
-	  lineEnd: function() {
-	    if (this._line === 0) { this._string.push("Z"); }
-	    this._point = NaN;
-	  },
-	  point: function(x, y) {
-	    switch (this._point) {
-	      case 0: {
-	        this._string.push("M", x, ",", y);
-	        this._point = 1;
-	        break;
-	      }
-	      case 1: {
-	        this._string.push("L", x, ",", y);
-	        break;
-	      }
-	      default: {
-	        if (this._circle == null) { this._circle = circle(this._radius); }
-	        this._string.push("M", x, ",", y, this._circle);
-	        break;
+	    function tryCatch(fn, obj, arg) {
+	      try {
+	        return {
+	          type: "normal",
+	          arg: fn.call(obj, arg)
+	        };
+	      } catch (err) {
+	        return {
+	          type: "throw",
+	          arg: err
+	        };
 	      }
 	    }
-	  },
-	  result: function() {
-	    if (this._string.length) {
-	      var result = this._string.join("");
-	      this._string = [];
-	      return result;
-	    } else {
-	      return null;
-	    }
-	  }
-	};
 
-	function circle(radius) {
-	  return "m0," + radius
-	      + "a" + radius + "," + radius + " 0 1,1 0," + -2 * radius
-	      + "a" + radius + "," + radius + " 0 1,1 0," + 2 * radius
-	      + "z";
-	}
+	    var GenStateSuspendedStart = "suspendedStart";
+	    var GenStateSuspendedYield = "suspendedYield";
+	    var GenStateExecuting = "executing";
+	    var GenStateCompleted = "completed"; // Returning this object from the innerFn has the same effect as
+	    // breaking out of the dispatch switch statement.
 
-	function d3_geoPath(projection, context) {
-	  var pointRadius = 4.5,
-	      projectionStream,
-	      contextStream;
+	    var ContinueSentinel = {}; // Dummy constructor functions that we use as the .constructor and
+	    // .constructor.prototype properties for functions that return Generator
+	    // objects. For full spec compliance, you may wish to configure your
+	    // minifier not to mangle the names of these two functions.
 
-	  function path(object) {
-	    if (object) {
-	      if (typeof pointRadius === "function") { contextStream.pointRadius(+pointRadius.apply(this, arguments)); }
-	      d3_geoStream(object, projectionStream(contextStream));
-	    }
-	    return contextStream.result();
-	  }
+	    function Generator() {}
 
-	  path.area = function(object) {
-	    d3_geoStream(object, projectionStream(areaStream$1));
-	    return areaStream$1.result();
-	  };
+	    function GeneratorFunction() {}
 
-	  path.measure = function(object) {
-	    d3_geoStream(object, projectionStream(lengthStream$1));
-	    return lengthStream$1.result();
-	  };
+	    function GeneratorFunctionPrototype() {} // This is a polyfill for %IteratorPrototype% for environments that
+	    // don't natively support it.
 
-	  path.bounds = function(object) {
-	    d3_geoStream(object, projectionStream(boundsStream$1));
-	    return boundsStream$1.result();
-	  };
 
-	  path.centroid = function(object) {
-	    d3_geoStream(object, projectionStream(centroidStream$1));
-	    return centroidStream$1.result();
-	  };
+	    var IteratorPrototype = {};
 
-	  path.projection = function(_) {
-	    return arguments.length ? (projectionStream = _ == null ? (projection = null, identity) : (projection = _).stream, path) : projection;
-	  };
+	    IteratorPrototype[iteratorSymbol] = function () {
+	      return this;
+	    };
 
-	  path.context = function(_) {
-	    if (!arguments.length) { return context; }
-	    contextStream = _ == null ? (context = null, new PathString) : new PathContext(context = _);
-	    if (typeof pointRadius !== "function") { contextStream.pointRadius(pointRadius); }
-	    return path;
-	  };
+	    var getProto = Object.getPrototypeOf;
+	    var NativeIteratorPrototype = getProto && getProto(getProto(values([])));
 
-	  path.pointRadius = function(_) {
-	    if (!arguments.length) { return pointRadius; }
-	    pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_);
-	    return path;
-	  };
+	    if (NativeIteratorPrototype && NativeIteratorPrototype !== Op && hasOwn.call(NativeIteratorPrototype, iteratorSymbol)) {
+	      // This environment has a native %IteratorPrototype%; use it instead
+	      // of the polyfill.
+	      IteratorPrototype = NativeIteratorPrototype;
+	    }
 
-	  return path.projection(projection).context(context);
-	}
+	    var Gp = GeneratorFunctionPrototype.prototype = Generator.prototype = Object.create(IteratorPrototype);
+	    GeneratorFunction.prototype = Gp.constructor = GeneratorFunctionPrototype;
+	    GeneratorFunctionPrototype.constructor = GeneratorFunction;
+	    GeneratorFunction.displayName = define(GeneratorFunctionPrototype, toStringTagSymbol, "GeneratorFunction"); // Helper for defining the .next, .throw, and .return methods of the
+	    // Iterator interface in terms of a single ._invoke method.
 
-	function d3_geoTransform(methods) {
-	  return {
-	    stream: transformer(methods)
-	  };
-	}
+	    function defineIteratorMethods(prototype) {
+	      ["next", "throw", "return"].forEach(function (method) {
+	        define(prototype, method, function (arg) {
+	          return this._invoke(method, arg);
+	        });
+	      });
+	    }
 
-	function transformer(methods) {
-	  return function(stream) {
-	    var s = new TransformStream;
-	    for (var key in methods) { s[key] = methods[key]; }
-	    s.stream = stream;
-	    return s;
-	  };
-	}
+	    exports.isGeneratorFunction = function (genFun) {
+	      var ctor = typeof genFun === "function" && genFun.constructor;
+	      return ctor ? ctor === GeneratorFunction || // For the native GeneratorFunction constructor, the best we can
+	      // do is to check its .name property.
+	      (ctor.displayName || ctor.name) === "GeneratorFunction" : false;
+	    };
 
-	function TransformStream() {}
+	    exports.mark = function (genFun) {
+	      if (Object.setPrototypeOf) {
+	        Object.setPrototypeOf(genFun, GeneratorFunctionPrototype);
+	      } else {
+	        genFun.__proto__ = GeneratorFunctionPrototype;
+	        define(genFun, toStringTagSymbol, "GeneratorFunction");
+	      }
 
-	TransformStream.prototype = {
-	  constructor: TransformStream,
-	  point: function(x, y) { this.stream.point(x, y); },
-	  sphere: function() { this.stream.sphere(); },
-	  lineStart: function() { this.stream.lineStart(); },
-	  lineEnd: function() { this.stream.lineEnd(); },
-	  polygonStart: function() { this.stream.polygonStart(); },
-	  polygonEnd: function() { this.stream.polygonEnd(); }
-	};
+	      genFun.prototype = Object.create(Gp);
+	      return genFun;
+	    }; // Within the body of any async function, `await x` is transformed to
+	    // `yield regeneratorRuntime.awrap(x)`, so that the runtime can test
+	    // `hasOwn.call(value, "__await")` to determine if the yielded value is
+	    // meant to be awaited.
 
-	function fit(projection, fitBounds, object) {
-	  var clip = projection.clipExtent && projection.clipExtent();
-	  projection.scale(150).translate([0, 0]);
-	  if (clip != null) { projection.clipExtent(null); }
-	  d3_geoStream(object, projection.stream(boundsStream$1));
-	  fitBounds(boundsStream$1.result());
-	  if (clip != null) { projection.clipExtent(clip); }
-	  return projection;
-	}
 
-	function fitExtent(projection, extent, object) {
-	  return fit(projection, function(b) {
-	    var w = extent[1][0] - extent[0][0],
-	        h = extent[1][1] - extent[0][1],
-	        k = Math.min(w / (b[1][0] - b[0][0]), h / (b[1][1] - b[0][1])),
-	        x = +extent[0][0] + (w - k * (b[1][0] + b[0][0])) / 2,
-	        y = +extent[0][1] + (h - k * (b[1][1] + b[0][1])) / 2;
-	    projection.scale(150 * k).translate([x, y]);
-	  }, object);
-	}
+	    exports.awrap = function (arg) {
+	      return {
+	        __await: arg
+	      };
+	    };
 
-	function fitSize(projection, size, object) {
-	  return fitExtent(projection, [[0, 0], size], object);
-	}
+	    function AsyncIterator(generator, PromiseImpl) {
+	      function invoke(method, arg, resolve, reject) {
+	        var record = tryCatch(generator[method], generator, arg);
 
-	function fitWidth(projection, width, object) {
-	  return fit(projection, function(b) {
-	    var w = +width,
-	        k = w / (b[1][0] - b[0][0]),
-	        x = (w - k * (b[1][0] + b[0][0])) / 2,
-	        y = -k * b[0][1];
-	    projection.scale(150 * k).translate([x, y]);
-	  }, object);
-	}
+	        if (record.type === "throw") {
+	          reject(record.arg);
+	        } else {
+	          var result = record.arg;
+	          var value = result.value;
+
+	          if (value && _typeof(value) === "object" && hasOwn.call(value, "__await")) {
+	            return PromiseImpl.resolve(value.__await).then(function (value) {
+	              invoke("next", value, resolve, reject);
+	            }, function (err) {
+	              invoke("throw", err, resolve, reject);
+	            });
+	          }
 
-	function fitHeight(projection, height, object) {
-	  return fit(projection, function(b) {
-	    var h = +height,
-	        k = h / (b[1][1] - b[0][1]),
-	        x = -k * b[0][0],
-	        y = (h - k * (b[1][1] + b[0][1])) / 2;
-	    projection.scale(150 * k).translate([x, y]);
-	  }, object);
-	}
+	          return PromiseImpl.resolve(value).then(function (unwrapped) {
+	            // When a yielded Promise is resolved, its final value becomes
+	            // the .value of the Promise<{value,done}> result for the
+	            // current iteration.
+	            result.value = unwrapped;
+	            resolve(result);
+	          }, function (error) {
+	            // If a rejected Promise was yielded, throw the rejection back
+	            // into the async generator function so it can be handled there.
+	            return invoke("throw", error, resolve, reject);
+	          });
+	        }
+	      }
 
-	var maxDepth = 16, // maximum depth of subdivision
-	    cosMinDistance = cos(30 * radians); // cos(minimum angular distance)
+	      var previousPromise;
 
-	function resample(project, delta2) {
-	  return +delta2 ? resample$1(project, delta2) : resampleNone(project);
-	}
+	      function enqueue(method, arg) {
+	        function callInvokeWithMethodAndArg() {
+	          return new PromiseImpl(function (resolve, reject) {
+	            invoke(method, arg, resolve, reject);
+	          });
+	        }
 
-	function resampleNone(project) {
-	  return transformer({
-	    point: function(x, y) {
-	      x = project(x, y);
-	      this.stream.point(x[0], x[1]);
-	    }
-	  });
-	}
+	        return previousPromise = // If enqueue has been called before, then we want to wait until
+	        // all previous Promises have been resolved before calling invoke,
+	        // so that results are always delivered in the correct order. If
+	        // enqueue has not been called before, then it is important to
+	        // call invoke immediately, without waiting on a callback to fire,
+	        // so that the async generator function has the opportunity to do
+	        // any necessary setup in a predictable way. This predictability
+	        // is why the Promise constructor synchronously invokes its
+	        // executor callback, and why async functions synchronously
+	        // execute code before the first await. Since we implement simple
+	        // async functions in terms of async generators, it is especially
+	        // important to get this right, even though it requires care.
+	        previousPromise ? previousPromise.then(callInvokeWithMethodAndArg, // Avoid propagating failures to Promises returned by later
+	        // invocations of the iterator.
+	        callInvokeWithMethodAndArg) : callInvokeWithMethodAndArg();
+	      } // Define the unified helper method that is used to implement .next,
+	      // .throw, and .return (see defineIteratorMethods).
 
-	function resample$1(project, delta2) {
 
-	  function resampleLineTo(x0, y0, lambda0, a0, b0, c0, x1, y1, lambda1, a1, b1, c1, depth, stream) {
-	    var dx = x1 - x0,
-	        dy = y1 - y0,
-	        d2 = dx * dx + dy * dy;
-	    if (d2 > 4 * delta2 && depth--) {
-	      var a = a0 + a1,
-	          b = b0 + b1,
-	          c = c0 + c1,
-	          m = sqrt(a * a + b * b + c * c),
-	          phi2 = asin(c /= m),
-	          lambda2 = abs$2(abs$2(c) - 1) < epsilon || abs$2(lambda0 - lambda1) < epsilon ? (lambda0 + lambda1) / 2 : atan2(b, a),
-	          p = project(lambda2, phi2),
-	          x2 = p[0],
-	          y2 = p[1],
-	          dx2 = x2 - x0,
-	          dy2 = y2 - y0,
-	          dz = dy * dx2 - dx * dy2;
-	      if (dz * dz / d2 > delta2 // perpendicular projected distance
-	          || abs$2((dx * dx2 + dy * dy2) / d2 - 0.5) > 0.3 // midpoint close to an end
-	          || a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) { // angular distance
-	        resampleLineTo(x0, y0, lambda0, a0, b0, c0, x2, y2, lambda2, a /= m, b /= m, c, depth, stream);
-	        stream.point(x2, y2);
-	        resampleLineTo(x2, y2, lambda2, a, b, c, x1, y1, lambda1, a1, b1, c1, depth, stream);
-	      }
+	      this._invoke = enqueue;
 	    }
-	  }
-	  return function(stream) {
-	    var lambda00, x00, y00, a00, b00, c00, // first point
-	        lambda0, x0, y0, a0, b0, c0; // previous point
 
-	    var resampleStream = {
-	      point: point,
-	      lineStart: lineStart,
-	      lineEnd: lineEnd,
-	      polygonStart: function() { stream.polygonStart(); resampleStream.lineStart = ringStart; },
-	      polygonEnd: function() { stream.polygonEnd(); resampleStream.lineStart = lineStart; }
+	    defineIteratorMethods(AsyncIterator.prototype);
+
+	    AsyncIterator.prototype[asyncIteratorSymbol] = function () {
+	      return this;
 	    };
 
-	    function point(x, y) {
-	      x = project(x, y);
-	      stream.point(x[0], x[1]);
-	    }
+	    exports.AsyncIterator = AsyncIterator; // Note that simple async functions are implemented on top of
+	    // AsyncIterator objects; they just return a Promise for the value of
+	    // the final result produced by the iterator.
 
-	    function lineStart() {
-	      x0 = NaN;
-	      resampleStream.point = linePoint;
-	      stream.lineStart();
-	    }
+	    exports.async = function (innerFn, outerFn, self, tryLocsList, PromiseImpl) {
+	      if (PromiseImpl === void 0) PromiseImpl = Promise;
+	      var iter = new AsyncIterator(wrap(innerFn, outerFn, self, tryLocsList), PromiseImpl);
+	      return exports.isGeneratorFunction(outerFn) ? iter // If outerFn is a generator, return the full iterator.
+	      : iter.next().then(function (result) {
+	        return result.done ? result.value : iter.next();
+	      });
+	    };
 
-	    function linePoint(lambda, phi) {
-	      var c = cartesian([lambda, phi]), p = project(lambda, phi);
-	      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x0 = p[0], y0 = p[1], lambda0 = lambda, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream);
-	      stream.point(x0, y0);
-	    }
+	    function makeInvokeMethod(innerFn, self, context) {
+	      var state = GenStateSuspendedStart;
+	      return function invoke(method, arg) {
+	        if (state === GenStateExecuting) {
+	          throw new Error("Generator is already running");
+	        }
 
-	    function lineEnd() {
-	      resampleStream.point = point;
-	      stream.lineEnd();
-	    }
+	        if (state === GenStateCompleted) {
+	          if (method === "throw") {
+	            throw arg;
+	          } // Be forgiving, per 25.3.3.3.3 of the spec:
+	          // https://people.mozilla.org/~jorendorff/es6-draft.html#sec-generatorresume
 
-	    function ringStart() {
-	      lineStart();
-	      resampleStream.point = ringPoint;
-	      resampleStream.lineEnd = ringEnd;
-	    }
 
-	    function ringPoint(lambda, phi) {
-	      linePoint(lambda00 = lambda, phi), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;
-	      resampleStream.point = linePoint;
-	    }
+	          return doneResult();
+	        }
 
-	    function ringEnd() {
-	      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x00, y00, lambda00, a00, b00, c00, maxDepth, stream);
-	      resampleStream.lineEnd = lineEnd;
-	      lineEnd();
-	    }
+	        context.method = method;
+	        context.arg = arg;
 
-	    return resampleStream;
-	  };
-	}
+	        while (true) {
+	          var delegate = context.delegate;
 
-	var transformRadians = transformer({
-	  point: function(x, y) {
-	    this.stream.point(x * radians, y * radians);
-	  }
-	});
+	          if (delegate) {
+	            var delegateResult = maybeInvokeDelegate(delegate, context);
 
-	function transformRotate(rotate) {
-	  return transformer({
-	    point: function(x, y) {
-	      var r = rotate(x, y);
-	      return this.stream.point(r[0], r[1]);
-	    }
-	  });
-	}
+	            if (delegateResult) {
+	              if (delegateResult === ContinueSentinel) continue;
+	              return delegateResult;
+	            }
+	          }
 
-	function scaleTranslate(k, dx, dy, sx, sy) {
-	  function transform(x, y) {
-	    x *= sx; y *= sy;
-	    return [dx + k * x, dy - k * y];
-	  }
-	  transform.invert = function(x, y) {
-	    return [(x - dx) / k * sx, (dy - y) / k * sy];
-	  };
-	  return transform;
-	}
+	          if (context.method === "next") {
+	            // Setting context._sent for legacy support of Babel's
+	            // function.sent implementation.
+	            context.sent = context._sent = context.arg;
+	          } else if (context.method === "throw") {
+	            if (state === GenStateSuspendedStart) {
+	              state = GenStateCompleted;
+	              throw context.arg;
+	            }
 
-	function scaleTranslateRotate(k, dx, dy, sx, sy, alpha) {
-	  var cosAlpha = cos(alpha),
-	      sinAlpha = sin(alpha),
-	      a = cosAlpha * k,
-	      b = sinAlpha * k,
-	      ai = cosAlpha / k,
-	      bi = sinAlpha / k,
-	      ci = (sinAlpha * dy - cosAlpha * dx) / k,
-	      fi = (sinAlpha * dx + cosAlpha * dy) / k;
-	  function transform(x, y) {
-	    x *= sx; y *= sy;
-	    return [a * x - b * y + dx, dy - b * x - a * y];
-	  }
-	  transform.invert = function(x, y) {
-	    return [sx * (ai * x - bi * y + ci), sy * (fi - bi * x - ai * y)];
-	  };
-	  return transform;
-	}
+	            context.dispatchException(context.arg);
+	          } else if (context.method === "return") {
+	            context.abrupt("return", context.arg);
+	          }
 
-	function projection(project) {
-	  return projectionMutator(function() { return project; })();
-	}
+	          state = GenStateExecuting;
+	          var record = tryCatch(innerFn, self, context);
 
-	function projectionMutator(projectAt) {
-	  var project,
-	      k = 150, // scale
-	      x = 480, y = 250, // translate
-	      lambda = 0, phi = 0, // center
-	      deltaLambda = 0, deltaPhi = 0, deltaGamma = 0, rotate, // pre-rotate
-	      alpha = 0, // post-rotate angle
-	      sx = 1, // reflectX
-	      sy = 1, // reflectX
-	      theta = null, preclip = clipAntimeridian, // pre-clip angle
-	      x0 = null, y0, x1, y1, postclip = identity, // post-clip extent
-	      delta2 = 0.5, // precision
-	      projectResample,
-	      projectTransform,
-	      projectRotateTransform,
-	      cache,
-	      cacheStream;
+	          if (record.type === "normal") {
+	            // If an exception is thrown from innerFn, we leave state ===
+	            // GenStateExecuting and loop back for another invocation.
+	            state = context.done ? GenStateCompleted : GenStateSuspendedYield;
 
-	  function projection(point) {
-	    return projectRotateTransform(point[0] * radians, point[1] * radians);
-	  }
+	            if (record.arg === ContinueSentinel) {
+	              continue;
+	            }
 
-	  function invert(point) {
-	    point = projectRotateTransform.invert(point[0], point[1]);
-	    return point && [point[0] * degrees, point[1] * degrees];
-	  }
+	            return {
+	              value: record.arg,
+	              done: context.done
+	            };
+	          } else if (record.type === "throw") {
+	            state = GenStateCompleted; // Dispatch the exception by looping back around to the
+	            // context.dispatchException(context.arg) call above.
 
-	  projection.stream = function(stream) {
-	    return cache && cacheStream === stream ? cache : cache = transformRadians(transformRotate(rotate)(preclip(projectResample(postclip(cacheStream = stream)))));
-	  };
+	            context.method = "throw";
+	            context.arg = record.arg;
+	          }
+	        }
+	      };
+	    } // Call delegate.iterator[context.method](context.arg) and handle the
+	    // result, either by returning a { value, done } result from the
+	    // delegate iterator, or by modifying context.method and context.arg,
+	    // setting context.delegate to null, and returning the ContinueSentinel.
+
+
+	    function maybeInvokeDelegate(delegate, context) {
+	      var method = delegate.iterator[context.method];
+
+	      if (method === undefined$1) {
+	        // A .throw or .return when the delegate iterator has no .throw
+	        // method always terminates the yield* loop.
+	        context.delegate = null;
+
+	        if (context.method === "throw") {
+	          // Note: ["return"] must be used for ES3 parsing compatibility.
+	          if (delegate.iterator["return"]) {
+	            // If the delegate iterator has a return method, give it a
+	            // chance to clean up.
+	            context.method = "return";
+	            context.arg = undefined$1;
+	            maybeInvokeDelegate(delegate, context);
+
+	            if (context.method === "throw") {
+	              // If maybeInvokeDelegate(context) changed context.method from
+	              // "return" to "throw", let that override the TypeError below.
+	              return ContinueSentinel;
+	            }
+	          }
 
-	  projection.preclip = function(_) {
-	    return arguments.length ? (preclip = _, theta = undefined, reset()) : preclip;
-	  };
+	          context.method = "throw";
+	          context.arg = new TypeError("The iterator does not provide a 'throw' method");
+	        }
 
-	  projection.postclip = function(_) {
-	    return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
-	  };
+	        return ContinueSentinel;
+	      }
 
-	  projection.clipAngle = function(_) {
-	    return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees;
-	  };
+	      var record = tryCatch(method, delegate.iterator, context.arg);
 
-	  projection.clipExtent = function(_) {
-	    return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
-	  };
+	      if (record.type === "throw") {
+	        context.method = "throw";
+	        context.arg = record.arg;
+	        context.delegate = null;
+	        return ContinueSentinel;
+	      }
 
-	  projection.scale = function(_) {
-	    return arguments.length ? (k = +_, recenter()) : k;
-	  };
+	      var info = record.arg;
 
-	  projection.translate = function(_) {
-	    return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y];
-	  };
+	      if (!info) {
+	        context.method = "throw";
+	        context.arg = new TypeError("iterator result is not an object");
+	        context.delegate = null;
+	        return ContinueSentinel;
+	      }
 
-	  projection.center = function(_) {
-	    return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees, phi * degrees];
-	  };
+	      if (info.done) {
+	        // Assign the result of the finished delegate to the temporary
+	        // variable specified by delegate.resultName (see delegateYield).
+	        context[delegate.resultName] = info.value; // Resume execution at the desired location (see delegateYield).
 
-	  projection.rotate = function(_) {
-	    return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees, deltaPhi * degrees, deltaGamma * degrees];
-	  };
+	        context.next = delegate.nextLoc; // If context.method was "throw" but the delegate handled the
+	        // exception, let the outer generator proceed normally. If
+	        // context.method was "next", forget context.arg since it has been
+	        // "consumed" by the delegate iterator. If context.method was
+	        // "return", allow the original .return call to continue in the
+	        // outer generator.
 
-	  projection.angle = function(_) {
-	    return arguments.length ? (alpha = _ % 360 * radians, recenter()) : alpha * degrees;
-	  };
+	        if (context.method !== "return") {
+	          context.method = "next";
+	          context.arg = undefined$1;
+	        }
+	      } else {
+	        // Re-yield the result returned by the delegate method.
+	        return info;
+	      } // The delegate iterator is finished, so forget it and continue with
+	      // the outer generator.
 
-	  projection.reflectX = function(_) {
-	    return arguments.length ? (sx = _ ? -1 : 1, recenter()) : sx < 0;
-	  };
 
-	  projection.reflectY = function(_) {
-	    return arguments.length ? (sy = _ ? -1 : 1, recenter()) : sy < 0;
-	  };
+	      context.delegate = null;
+	      return ContinueSentinel;
+	    } // Define Generator.prototype.{next,throw,return} in terms of the
+	    // unified ._invoke helper method.
 
-	  projection.precision = function(_) {
-	    return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt(delta2);
-	  };
 
-	  projection.fitExtent = function(extent, object) {
-	    return fitExtent(projection, extent, object);
-	  };
+	    defineIteratorMethods(Gp);
+	    define(Gp, toStringTagSymbol, "Generator"); // A Generator should always return itself as the iterator object when the
+	    // @@iterator function is called on it. Some browsers' implementations of the
+	    // iterator prototype chain incorrectly implement this, causing the Generator
+	    // object to not be returned from this call. This ensures that doesn't happen.
+	    // See https://github.com/facebook/regenerator/issues/274 for more details.
 
-	  projection.fitSize = function(size, object) {
-	    return fitSize(projection, size, object);
-	  };
+	    Gp[iteratorSymbol] = function () {
+	      return this;
+	    };
 
-	  projection.fitWidth = function(width, object) {
-	    return fitWidth(projection, width, object);
-	  };
+	    Gp.toString = function () {
+	      return "[object Generator]";
+	    };
 
-	  projection.fitHeight = function(height, object) {
-	    return fitHeight(projection, height, object);
-	  };
+	    function pushTryEntry(locs) {
+	      var entry = {
+	        tryLoc: locs[0]
+	      };
 
-	  function recenter() {
-	    var center = scaleTranslateRotate(k, 0, 0, sx, sy, alpha).apply(null, project(lambda, phi)),
-	        transform = (alpha ? scaleTranslateRotate : scaleTranslate)(k, x - center[0], y - center[1], sx, sy, alpha);
-	    rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma);
-	    projectTransform = compose(project, transform);
-	    projectRotateTransform = compose(rotate, projectTransform);
-	    projectResample = resample(projectTransform, delta2);
-	    return reset();
-	  }
+	      if (1 in locs) {
+	        entry.catchLoc = locs[1];
+	      }
 
-	  function reset() {
-	    cache = cacheStream = null;
-	    return projection;
-	  }
+	      if (2 in locs) {
+	        entry.finallyLoc = locs[2];
+	        entry.afterLoc = locs[3];
+	      }
 
-	  return function() {
-	    project = projectAt.apply(this, arguments);
-	    projection.invert = project.invert && invert;
-	    return recenter();
-	  };
-	}
+	      this.tryEntries.push(entry);
+	    }
 
-	function mercatorRaw(lambda, phi) {
-	  return [lambda, log(tan((halfPi + phi) / 2))];
-	}
+	    function resetTryEntry(entry) {
+	      var record = entry.completion || {};
+	      record.type = "normal";
+	      delete record.arg;
+	      entry.completion = record;
+	    }
 
-	mercatorRaw.invert = function(x, y) {
-	  return [x, 2 * atan(exp(y)) - halfPi];
-	};
+	    function Context(tryLocsList) {
+	      // The root entry object (effectively a try statement without a catch
+	      // or a finally block) gives us a place to store values thrown from
+	      // locations where there is no enclosing try statement.
+	      this.tryEntries = [{
+	        tryLoc: "root"
+	      }];
+	      tryLocsList.forEach(pushTryEntry, this);
+	      this.reset(true);
+	    }
 
-	function mercator() {
-	  return mercatorProjection(mercatorRaw)
-	      .scale(961 / tau);
-	}
+	    exports.keys = function (object) {
+	      var keys = [];
 
-	function mercatorProjection(project) {
-	  var m = projection(project),
-	      center = m.center,
-	      scale = m.scale,
-	      translate = m.translate,
-	      clipExtent = m.clipExtent,
-	      x0 = null, y0, x1, y1; // clip extent
+	      for (var key in object) {
+	        keys.push(key);
+	      }
 
-	  m.scale = function(_) {
-	    return arguments.length ? (scale(_), reclip()) : scale();
-	  };
+	      keys.reverse(); // Rather than returning an object with a next method, we keep
+	      // things simple and return the next function itself.
 
-	  m.translate = function(_) {
-	    return arguments.length ? (translate(_), reclip()) : translate();
-	  };
+	      return function next() {
+	        while (keys.length) {
+	          var key = keys.pop();
 
-	  m.center = function(_) {
-	    return arguments.length ? (center(_), reclip()) : center();
-	  };
+	          if (key in object) {
+	            next.value = key;
+	            next.done = false;
+	            return next;
+	          }
+	        } // To avoid creating an additional object, we just hang the .value
+	        // and .done properties off the next function object itself. This
+	        // also ensures that the minifier will not anonymize the function.
 
-	  m.clipExtent = function(_) {
-	    return arguments.length ? ((_ == null ? x0 = y0 = x1 = y1 = null : (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1])), reclip()) : x0 == null ? null : [[x0, y0], [x1, y1]];
-	  };
 
-	  function reclip() {
-	    var k = pi * scale(),
-	        t = m(rotation(m.rotate()).invert([0, 0]));
-	    return clipExtent(x0 == null
-	        ? [[t[0] - k, t[1] - k], [t[0] + k, t[1] + k]] : project === mercatorRaw
-	        ? [[Math.max(t[0] - k, x0), y0], [Math.min(t[0] + k, x1), y1]]
-	        : [[x0, Math.max(t[1] - k, y0)], [x1, Math.min(t[1] + k, y1)]]);
-	  }
+	        next.done = true;
+	        return next;
+	      };
+	    };
 
-	  return reclip();
-	}
+	    function values(iterable) {
+	      if (iterable) {
+	        var iteratorMethod = iterable[iteratorSymbol];
 
-	function d3_geoIdentity() {
-	  var k = 1, tx = 0, ty = 0, sx = 1, sy = 1, // scale, translate and reflect
-	      alpha = 0, ca, sa, // angle
-	      x0 = null, y0, x1, y1, // clip extent
-	      kx = 1, ky = 1,
-	      transform = transformer({
-	        point: function(x, y) {
-	          var p = projection([x, y]);
-	          this.stream.point(p[0], p[1]);
+	        if (iteratorMethod) {
+	          return iteratorMethod.call(iterable);
 	        }
-	      }),
-	      postclip = identity,
-	      cache,
-	      cacheStream;
 
-	  function reset() {
-	    kx = k * sx;
-	    ky = k * sy;
-	    cache = cacheStream = null;
-	    return projection;
-	  }
+	        if (typeof iterable.next === "function") {
+	          return iterable;
+	        }
 
-	  function projection (p) {
-	    var x = p[0] * kx, y = p[1] * ky;
-	    if (alpha) {
-	      var t = y * ca - x * sa;
-	      x = x * ca + y * sa;
-	      y = t;
-	    }    
-	    return [x + tx, y + ty];
-	  }
-	  projection.invert = function(p) {
-	    var x = p[0] - tx, y = p[1] - ty;
-	    if (alpha) {
-	      var t = y * ca + x * sa;
-	      x = x * ca - y * sa;
-	      y = t;
-	    }
-	    return [x / kx, y / ky];
-	  };
-	  projection.stream = function(stream) {
-	    return cache && cacheStream === stream ? cache : cache = transform(postclip(cacheStream = stream));
-	  };
-	  projection.postclip = function(_) {
-	    return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
-	  };
-	  projection.clipExtent = function(_) {
-	    return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
-	  };
-	  projection.scale = function(_) {
-	    return arguments.length ? (k = +_, reset()) : k;
-	  };
-	  projection.translate = function(_) {
-	    return arguments.length ? (tx = +_[0], ty = +_[1], reset()) : [tx, ty];
-	  };
-	  projection.angle = function(_) {
-	    return arguments.length ? (alpha = _ % 360 * radians, sa = sin(alpha), ca = cos(alpha), reset()) : alpha * degrees;
-	  };
-	  projection.reflectX = function(_) {
-	    return arguments.length ? (sx = _ ? -1 : 1, reset()) : sx < 0;
-	  };
-	  projection.reflectY = function(_) {
-	    return arguments.length ? (sy = _ ? -1 : 1, reset()) : sy < 0;
-	  };
-	  projection.fitExtent = function(extent, object) {
-	    return fitExtent(projection, extent, object);
-	  };
-	  projection.fitSize = function(size, object) {
-	    return fitSize(projection, size, object);
-	  };
-	  projection.fitWidth = function(width, object) {
-	    return fitWidth(projection, width, object);
-	  };
-	  projection.fitHeight = function(height, object) {
-	    return fitHeight(projection, height, object);
-	  };
+	        if (!isNaN(iterable.length)) {
+	          var i = -1,
+	              next = function next() {
+	            while (++i < iterable.length) {
+	              if (hasOwn.call(iterable, i)) {
+	                next.value = iterable[i];
+	                next.done = false;
+	                return next;
+	              }
+	            }
 
-	  return projection;
-	}
+	            next.value = undefined$1;
+	            next.done = true;
+	            return next;
+	          };
 
-	// constants
-	var TAU = 2 * Math.PI;
-	var EQUATORIAL_RADIUS = 6356752.314245179;
-	var POLAR_RADIUS = 6378137.0;
+	          return next.next = next;
+	        }
+	      } // Return an iterator with no values.
 
 
-	function geoLatToMeters(dLat) {
-	    return dLat * (TAU * POLAR_RADIUS / 360);
-	}
+	      return {
+	        next: doneResult
+	      };
+	    }
 
+	    exports.values = values;
 
-	function geoLonToMeters(dLon, atLat) {
-	    return Math.abs(atLat) >= 90 ? 0 :
-	        dLon * (TAU * EQUATORIAL_RADIUS / 360) * Math.abs(Math.cos(atLat * (Math.PI / 180)));
-	}
+	    function doneResult() {
+	      return {
+	        value: undefined$1,
+	        done: true
+	      };
+	    }
 
+	    Context.prototype = {
+	      constructor: Context,
+	      reset: function reset(skipTempReset) {
+	        this.prev = 0;
+	        this.next = 0; // Resetting context._sent for legacy support of Babel's
+	        // function.sent implementation.
 
-	function geoMetersToLat(m) {
-	    return m / (TAU * POLAR_RADIUS / 360);
-	}
+	        this.sent = this._sent = undefined$1;
+	        this.done = false;
+	        this.delegate = null;
+	        this.method = "next";
+	        this.arg = undefined$1;
+	        this.tryEntries.forEach(resetTryEntry);
 
+	        if (!skipTempReset) {
+	          for (var name in this) {
+	            // Not sure about the optimal order of these conditions:
+	            if (name.charAt(0) === "t" && hasOwn.call(this, name) && !isNaN(+name.slice(1))) {
+	              this[name] = undefined$1;
+	            }
+	          }
+	        }
+	      },
+	      stop: function stop() {
+	        this.done = true;
+	        var rootEntry = this.tryEntries[0];
+	        var rootRecord = rootEntry.completion;
 
-	function geoMetersToLon(m, atLat) {
-	    return Math.abs(atLat) >= 90 ? 0 :
-	        m / (TAU * EQUATORIAL_RADIUS / 360) / Math.abs(Math.cos(atLat * (Math.PI / 180)));
-	}
+	        if (rootRecord.type === "throw") {
+	          throw rootRecord.arg;
+	        }
 
+	        return this.rval;
+	      },
+	      dispatchException: function dispatchException(exception) {
+	        if (this.done) {
+	          throw exception;
+	        }
 
-	function geoMetersToOffset(meters, tileSize) {
-	    tileSize = tileSize || 256;
-	    return [
-	        meters[0] * tileSize / (TAU * EQUATORIAL_RADIUS),
-	        -meters[1] * tileSize / (TAU * POLAR_RADIUS)
-	    ];
-	}
+	        var context = this;
 
+	        function handle(loc, caught) {
+	          record.type = "throw";
+	          record.arg = exception;
+	          context.next = loc;
 
-	function geoOffsetToMeters(offset, tileSize) {
-	    tileSize = tileSize || 256;
-	    return [
-	        offset[0] * TAU * EQUATORIAL_RADIUS / tileSize,
-	        -offset[1] * TAU * POLAR_RADIUS / tileSize
-	    ];
-	}
+	          if (caught) {
+	            // If the dispatched exception was caught by a catch block,
+	            // then let that catch block handle the exception normally.
+	            context.method = "next";
+	            context.arg = undefined$1;
+	          }
 
+	          return !!caught;
+	        }
 
-	// Equirectangular approximation of spherical distances on Earth
-	function geoSphericalDistance(a, b) {
-	    var x = geoLonToMeters(a[0] - b[0], (a[1] + b[1]) / 2);
-	    var y = geoLatToMeters(a[1] - b[1]);
-	    return Math.sqrt((x * x) + (y * y));
-	}
+	        for (var i = this.tryEntries.length - 1; i >= 0; --i) {
+	          var entry = this.tryEntries[i];
+	          var record = entry.completion;
 
+	          if (entry.tryLoc === "root") {
+	            // Exception thrown outside of any try block that could handle
+	            // it, so set the completion value of the entire function to
+	            // throw the exception.
+	            return handle("end");
+	          }
 
-	// scale to zoom
-	function geoScaleToZoom(k, tileSize) {
-	    tileSize = tileSize || 256;
-	    var log2ts = Math.log(tileSize) * Math.LOG2E;
-	    return Math.log(k * TAU) / Math.LN2 - log2ts;
-	}
+	          if (entry.tryLoc <= this.prev) {
+	            var hasCatch = hasOwn.call(entry, "catchLoc");
+	            var hasFinally = hasOwn.call(entry, "finallyLoc");
 
+	            if (hasCatch && hasFinally) {
+	              if (this.prev < entry.catchLoc) {
+	                return handle(entry.catchLoc, true);
+	              } else if (this.prev < entry.finallyLoc) {
+	                return handle(entry.finallyLoc);
+	              }
+	            } else if (hasCatch) {
+	              if (this.prev < entry.catchLoc) {
+	                return handle(entry.catchLoc, true);
+	              }
+	            } else if (hasFinally) {
+	              if (this.prev < entry.finallyLoc) {
+	                return handle(entry.finallyLoc);
+	              }
+	            } else {
+	              throw new Error("try statement without catch or finally");
+	            }
+	          }
+	        }
+	      },
+	      abrupt: function abrupt(type, arg) {
+	        for (var i = this.tryEntries.length - 1; i >= 0; --i) {
+	          var entry = this.tryEntries[i];
 
-	// zoom to scale
-	function geoZoomToScale(z, tileSize) {
-	    tileSize = tileSize || 256;
-	    return tileSize * Math.pow(2, z) / TAU;
-	}
+	          if (entry.tryLoc <= this.prev && hasOwn.call(entry, "finallyLoc") && this.prev < entry.finallyLoc) {
+	            var finallyEntry = entry;
+	            break;
+	          }
+	        }
 
+	        if (finallyEntry && (type === "break" || type === "continue") && finallyEntry.tryLoc <= arg && arg <= finallyEntry.finallyLoc) {
+	          // Ignore the finally entry if control is not jumping to a
+	          // location outside the try/catch block.
+	          finallyEntry = null;
+	        }
 
-	// returns info about the node from `nodes` closest to the given `point`
-	function geoSphericalClosestNode(nodes, point) {
-	    var minDistance = Infinity, distance;
-	    var indexOfMin;
+	        var record = finallyEntry ? finallyEntry.completion : {};
+	        record.type = type;
+	        record.arg = arg;
 
-	    for (var i in nodes) {
-	        distance = geoSphericalDistance(nodes[i].loc, point);
-	        if (distance < minDistance) {
-	            minDistance = distance;
-	            indexOfMin = i;
+	        if (finallyEntry) {
+	          this.method = "next";
+	          this.next = finallyEntry.finallyLoc;
+	          return ContinueSentinel;
 	        }
-	    }
 
-	    if (indexOfMin !== undefined) {
-	        return { index: indexOfMin, distance: minDistance, node: nodes[indexOfMin] };
-	    } else {
-	        return null;
-	    }
-	}
+	        return this.complete(record);
+	      },
+	      complete: function complete(record, afterLoc) {
+	        if (record.type === "throw") {
+	          throw record.arg;
+	        }
 
-	function geoExtent(min, max) {
-	    if (!(this instanceof geoExtent)) {
-	        return new geoExtent(min, max);
-	    } else if (min instanceof geoExtent) {
-	        return min;
-	    } else if (min && min.length === 2 && min[0].length === 2 && min[1].length === 2) {
-	        this[0] = min[0];
-	        this[1] = min[1];
-	    } else {
-	        this[0] = min        || [ Infinity,  Infinity];
-	        this[1] = max || min || [-Infinity, -Infinity];
-	    }
-	}
+	        if (record.type === "break" || record.type === "continue") {
+	          this.next = record.arg;
+	        } else if (record.type === "return") {
+	          this.rval = this.arg = record.arg;
+	          this.method = "return";
+	          this.next = "end";
+	        } else if (record.type === "normal" && afterLoc) {
+	          this.next = afterLoc;
+	        }
 
-	geoExtent.prototype = new Array(2);
+	        return ContinueSentinel;
+	      },
+	      finish: function finish(finallyLoc) {
+	        for (var i = this.tryEntries.length - 1; i >= 0; --i) {
+	          var entry = this.tryEntries[i];
+
+	          if (entry.finallyLoc === finallyLoc) {
+	            this.complete(entry.completion, entry.afterLoc);
+	            resetTryEntry(entry);
+	            return ContinueSentinel;
+	          }
+	        }
+	      },
+	      "catch": function _catch(tryLoc) {
+	        for (var i = this.tryEntries.length - 1; i >= 0; --i) {
+	          var entry = this.tryEntries[i];
 
-	Object.assign(geoExtent.prototype, {
+	          if (entry.tryLoc === tryLoc) {
+	            var record = entry.completion;
 
-	    equals: function (obj) {
-	        return this[0][0] === obj[0][0] &&
-	            this[0][1] === obj[0][1] &&
-	            this[1][0] === obj[1][0] &&
-	            this[1][1] === obj[1][1];
-	    },
+	            if (record.type === "throw") {
+	              var thrown = record.arg;
+	              resetTryEntry(entry);
+	            }
 
+	            return thrown;
+	          }
+	        } // The context.catch method must only be called with a location
+	        // argument that corresponds to a known catch block.
 
-	    extend: function(obj) {
-	        if (!(obj instanceof geoExtent)) { obj = new geoExtent(obj); }
-	        return geoExtent(
-	            [Math.min(obj[0][0], this[0][0]), Math.min(obj[0][1], this[0][1])],
-	            [Math.max(obj[1][0], this[1][0]), Math.max(obj[1][1], this[1][1])]
-	        );
-	    },
 
+	        throw new Error("illegal catch attempt");
+	      },
+	      delegateYield: function delegateYield(iterable, resultName, nextLoc) {
+	        this.delegate = {
+	          iterator: values(iterable),
+	          resultName: resultName,
+	          nextLoc: nextLoc
+	        };
 
-	    _extend: function(extent) {
-	        this[0][0] = Math.min(extent[0][0], this[0][0]);
-	        this[0][1] = Math.min(extent[0][1], this[0][1]);
-	        this[1][0] = Math.max(extent[1][0], this[1][0]);
-	        this[1][1] = Math.max(extent[1][1], this[1][1]);
-	    },
+	        if (this.method === "next") {
+	          // Deliberately forget the last sent value so that we don't
+	          // accidentally pass it on to the delegate.
+	          this.arg = undefined$1;
+	        }
 
+	        return ContinueSentinel;
+	      }
+	    }; // Regardless of whether this script is executing as a CommonJS module
+	    // or not, return the runtime object so that we can declare the variable
+	    // regeneratorRuntime in the outer scope, which allows this module to be
+	    // injected easily by `bin/regenerator --include-runtime script.js`.
+
+	    return exports;
+	  }( // If this script is executing as a CommonJS module, use module.exports
+	  // as the regeneratorRuntime namespace. Otherwise create a new empty
+	  // object. Either way, the resulting object will be used to initialize
+	  // the regeneratorRuntime variable at the top of this file.
+	  module.exports );
 
-	    area: function() {
-	        return Math.abs((this[1][0] - this[0][0]) * (this[1][1] - this[0][1]));
-	    },
+	  try {
+	    regeneratorRuntime = runtime;
+	  } catch (accidentalStrictMode) {
+	    // This module should not be running in strict mode, so the above
+	    // assignment should always work unless something is misconfigured. Just
+	    // in case runtime.js accidentally runs in strict mode, we can escape
+	    // strict mode using a global Function call. This could conceivably fail
+	    // if a Content Security Policy forbids using Function, but in that case
+	    // the proper solution is to fix the accidental strict mode problem. If
+	    // you've misconfigured your bundler to force strict mode and applied a
+	    // CSP to forbid Function, and you're not willing to fix either of those
+	    // problems, please detail your unique predicament in a GitHub issue.
+	    Function("r", "regeneratorRuntime = r")(runtime);
+	  }
+	})(runtime);
+
+	var _marked$3 = /*#__PURE__*/regeneratorRuntime.mark(numbers);
+
+	function number$1 (x) {
+	  return x === null ? NaN : +x;
+	}
+	function numbers(values, valueof) {
+	  var _iterator, _step, value, index, _iterator2, _step2, _value;
 
+	  return regeneratorRuntime.wrap(function numbers$(_context) {
+	    while (1) {
+	      switch (_context.prev = _context.next) {
+	        case 0:
+	          if (!(valueof === undefined)) {
+	            _context.next = 21;
+	            break;
+	          }
 
-	    center: function() {
-	        return [(this[0][0] + this[1][0]) / 2, (this[0][1] + this[1][1]) / 2];
-	    },
+	          _iterator = _createForOfIteratorHelper(values);
+	          _context.prev = 2;
 
+	          _iterator.s();
 
-	    rectangle: function() {
-	        return [this[0][0], this[0][1], this[1][0], this[1][1]];
-	    },
+	        case 4:
+	          if ((_step = _iterator.n()).done) {
+	            _context.next = 11;
+	            break;
+	          }
 
+	          value = _step.value;
 
-	    bbox: function() {
-	        return { minX: this[0][0], minY: this[0][1], maxX: this[1][0], maxY: this[1][1] };
-	    },
+	          if (!(value != null && (value = +value) >= value)) {
+	            _context.next = 9;
+	            break;
+	          }
 
+	          _context.next = 9;
+	          return value;
 
-	    polygon: function() {
-	        return [
-	            [this[0][0], this[0][1]],
-	            [this[0][0], this[1][1]],
-	            [this[1][0], this[1][1]],
-	            [this[1][0], this[0][1]],
-	            [this[0][0], this[0][1]]
-	        ];
-	    },
+	        case 9:
+	          _context.next = 4;
+	          break;
 
+	        case 11:
+	          _context.next = 16;
+	          break;
 
-	    contains: function(obj) {
-	        if (!(obj instanceof geoExtent)) { obj = new geoExtent(obj); }
-	        return obj[0][0] >= this[0][0] &&
-	               obj[0][1] >= this[0][1] &&
-	               obj[1][0] <= this[1][0] &&
-	               obj[1][1] <= this[1][1];
-	    },
+	        case 13:
+	          _context.prev = 13;
+	          _context.t0 = _context["catch"](2);
 
+	          _iterator.e(_context.t0);
 
-	    intersects: function(obj) {
-	        if (!(obj instanceof geoExtent)) { obj = new geoExtent(obj); }
-	        return obj[0][0] <= this[1][0] &&
-	               obj[0][1] <= this[1][1] &&
-	               obj[1][0] >= this[0][0] &&
-	               obj[1][1] >= this[0][1];
-	    },
+	        case 16:
+	          _context.prev = 16;
 
+	          _iterator.f();
 
-	    intersection: function(obj) {
-	        if (!this.intersects(obj)) { return new geoExtent(); }
-	        return new geoExtent(
-	            [Math.max(obj[0][0], this[0][0]), Math.max(obj[0][1], this[0][1])],
-	            [Math.min(obj[1][0], this[1][0]), Math.min(obj[1][1], this[1][1])]
-	        );
-	    },
+	          return _context.finish(16);
 
+	        case 19:
+	          _context.next = 40;
+	          break;
 
-	    percentContainedIn: function(obj) {
-	        if (!(obj instanceof geoExtent)) { obj = new geoExtent(obj); }
-	        var a1 = this.intersection(obj).area();
-	        var a2 = this.area();
+	        case 21:
+	          index = -1;
+	          _iterator2 = _createForOfIteratorHelper(values);
+	          _context.prev = 23;
 
-	        if (a1 === Infinity || a2 === Infinity) {
-	            return 0;
-	        } else if (a1 === 0 || a2 === 0) {
-	            if (obj.contains(this)) {
-	                return 1;
-	            }
-	            return 0;
-	        } else {
-	            return a1 / a2;
-	        }
-	    },
+	          _iterator2.s();
 
+	        case 25:
+	          if ((_step2 = _iterator2.n()).done) {
+	            _context.next = 32;
+	            break;
+	          }
 
-	    padByMeters: function(meters) {
-	        var dLat = geoMetersToLat(meters);
-	        var dLon = geoMetersToLon(meters, this.center()[1]);
-	        return geoExtent(
-	            [this[0][0] - dLon, this[0][1] - dLat],
-	            [this[1][0] + dLon, this[1][1] + dLat]
-	        );
-	    },
+	          _value = _step2.value;
 
+	          if (!((_value = valueof(_value, ++index, values)) != null && (_value = +_value) >= _value)) {
+	            _context.next = 30;
+	            break;
+	          }
 
-	    toParam: function() {
-	        return this.rectangle().join(',');
-	    }
+	          _context.next = 30;
+	          return _value;
 
-	});
+	        case 30:
+	          _context.next = 25;
+	          break;
 
-	function d3_polygonArea(polygon) {
-	  var i = -1,
-	      n = polygon.length,
-	      a,
-	      b = polygon[n - 1],
-	      area = 0;
+	        case 32:
+	          _context.next = 37;
+	          break;
 
-	  while (++i < n) {
-	    a = b;
-	    b = polygon[i];
-	    area += a[1] * b[0] - a[0] * b[1];
-	  }
+	        case 34:
+	          _context.prev = 34;
+	          _context.t1 = _context["catch"](23);
 
-	  return area / 2;
-	}
+	          _iterator2.e(_context.t1);
 
-	function d3_polygonCentroid(polygon) {
-	  var i = -1,
-	      n = polygon.length,
-	      x = 0,
-	      y = 0,
-	      a,
-	      b = polygon[n - 1],
-	      c,
-	      k = 0;
+	        case 37:
+	          _context.prev = 37;
 
-	  while (++i < n) {
-	    a = b;
-	    b = polygon[i];
-	    k += c = a[0] * b[1] - b[0] * a[1];
-	    x += (a[0] + b[0]) * c;
-	    y += (a[1] + b[1]) * c;
-	  }
+	          _iterator2.f();
 
-	  return k *= 3, [x / k, y / k];
-	}
+	          return _context.finish(37);
 
-	// Returns the 2D cross product of AB and AC vectors, i.e., the z-component of
-	// the 3D cross product in a quadrant I Cartesian coordinate system (+x is
-	// right, +y is up). Returns a positive value if ABC is counter-clockwise,
-	// negative if clockwise, and zero if the points are collinear.
-	function cross(a, b, c) {
-	  return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);
+	        case 40:
+	        case "end":
+	          return _context.stop();
+	      }
+	    }
+	  }, _marked$3, null, [[2, 13, 16, 19], [23, 34, 37, 40]]);
 	}
 
-	function lexicographicOrder(a, b) {
-	  return a[0] - b[0] || a[1] - b[1];
-	}
+	var ascendingBisect = d3_bisector(d3_ascending);
+	var bisectRight = ascendingBisect.right;
+	d3_bisector(number$1).center;
 
-	// Computes the upper convex hull per the monotone chain algorithm.
-	// Assumes points.length >= 3, is sorted by x, unique in y.
-	// Returns an array of indices into points in left-to-right order.
-	function computeUpperHullIndexes(points) {
-	  var n = points.length,
-	      indexes = [0, 1],
-	      size = 2;
+	var $$w = _export;
+	var from = arrayFrom$1;
+	var checkCorrectnessOfIteration = checkCorrectnessOfIteration$4;
 
-	  for (var i = 2; i < n; ++i) {
-	    while (size > 1 && cross(points[indexes[size - 2]], points[indexes[size - 1]], points[i]) <= 0) { --size; }
-	    indexes[size++] = i;
-	  }
+	var INCORRECT_ITERATION = !checkCorrectnessOfIteration(function (iterable) {
+	  // eslint-disable-next-line es/no-array-from -- required for testing
+	  Array.from(iterable);
+	});
 
-	  return indexes.slice(0, size); // remove popped points
-	}
+	// `Array.from` method
+	// https://tc39.es/ecma262/#sec-array.from
+	$$w({ target: 'Array', stat: true, forced: INCORRECT_ITERATION }, {
+	  from: from
+	});
 
-	function d3_polygonHull(points) {
-	  if ((n = points.length) < 3) { return null; }
+	var $$v = _export;
+	var fill = arrayFill$1;
+	var addToUnscopables$3 = addToUnscopables$5;
 
-	  var i,
-	      n,
-	      sortedPoints = new Array(n),
-	      flippedPoints = new Array(n);
+	// `Array.prototype.fill` method
+	// https://tc39.es/ecma262/#sec-array.prototype.fill
+	$$v({ target: 'Array', proto: true }, {
+	  fill: fill
+	});
 
-	  for (i = 0; i < n; ++i) { sortedPoints[i] = [+points[i][0], +points[i][1], i]; }
-	  sortedPoints.sort(lexicographicOrder);
-	  for (i = 0; i < n; ++i) { flippedPoints[i] = [sortedPoints[i][0], -sortedPoints[i][1]]; }
+	// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+	addToUnscopables$3('fill');
 
-	  var upperIndexes = computeUpperHullIndexes(sortedPoints),
-	      lowerIndexes = computeUpperHullIndexes(flippedPoints);
+	var $$u = _export;
+	var $some = arrayIteration.some;
+	var arrayMethodIsStrict$3 = arrayMethodIsStrict$8;
 
-	  // Construct the hull polygon, removing possible duplicate endpoints.
-	  var skipLeft = lowerIndexes[0] === upperIndexes[0],
-	      skipRight = lowerIndexes[lowerIndexes.length - 1] === upperIndexes[upperIndexes.length - 1],
-	      hull = [];
+	var STRICT_METHOD$3 = arrayMethodIsStrict$3('some');
 
-	  // Add upper hull in right-to-l order.
-	  // Then add lower hull in left-to-right order.
-	  for (i = upperIndexes.length - 1; i >= 0; --i) { hull.push(points[sortedPoints[upperIndexes[i]][2]]); }
-	  for (i = +skipLeft; i < lowerIndexes.length - skipRight; ++i) { hull.push(points[sortedPoints[lowerIndexes[i]][2]]); }
+	// `Array.prototype.some` method
+	// https://tc39.es/ecma262/#sec-array.prototype.some
+	$$u({ target: 'Array', proto: true, forced: !STRICT_METHOD$3 }, {
+	  some: function some(callbackfn /* , thisArg */) {
+	    return $some(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
 
-	  return hull;
-	}
+	var TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS = typedArrayConstructorsRequireWrappers;
+	var exportTypedArrayStaticMethod = arrayBufferViewCore.exportTypedArrayStaticMethod;
+	var typedArrayFrom = typedArrayFrom$2;
 
-	// vector equals
-	function geoVecEqual(a, b, epsilon) {
-	    if (epsilon) {
-	        return (Math.abs(a[0] - b[0]) <= epsilon) && (Math.abs(a[1] - b[1]) <= epsilon);
-	    } else {
-	        return (a[0] === b[0]) && (a[1] === b[1]);
-	    }
-	}
+	// `%TypedArray%.from` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.from
+	exportTypedArrayStaticMethod('from', typedArrayFrom, TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS);
 
-	// vector addition
-	function geoVecAdd(a, b) {
-	    return [ a[0] + b[0], a[1] + b[1] ];
-	}
+	var createTypedArrayConstructor = typedArrayConstructor.exports;
 
-	// vector subtraction
-	function geoVecSubtract(a, b) {
-	    return [ a[0] - b[0], a[1] - b[1] ];
-	}
+	// `Float64Array` constructor
+	// https://tc39.es/ecma262/#sec-typedarray-objects
+	createTypedArrayConstructor('Float64', function (init) {
+	  return function Float64Array(data, byteOffset, length) {
+	    return init(this, data, byteOffset, length);
+	  };
+	});
 
-	// vector scaling
-	function geoVecScale(a, mag) {
-	    return [ a[0] * mag, a[1] * mag ];
+	function d3_descending (a, b) {
+	  return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
 	}
 
-	// vector rounding (was: geoRoundCoordinates)
-	function geoVecFloor(a) {
-	    return [ Math.floor(a[0]), Math.floor(a[1]) ];
-	}
+	// https://github.com/python/cpython/blob/a74eea238f5baba15797e2e8b570d153bc8690a7/Modules/mathmodule.c#L1423
+	var Adder = /*#__PURE__*/function () {
+	  function Adder() {
+	    _classCallCheck$1(this, Adder);
 
-	// linear interpolation
-	function geoVecInterp(a, b, t) {
-	    return [
-	        a[0] + (b[0] - a[0]) * t,
-	        a[1] + (b[1] - a[1]) * t
-	    ];
-	}
+	    this._partials = new Float64Array(32);
+	    this._n = 0;
+	  }
 
-	// http://jsperf.com/id-dist-optimization
-	function geoVecLength(a, b) {
-	    return Math.sqrt(geoVecLengthSquare(a,b));
-	}
+	  _createClass$1(Adder, [{
+	    key: "add",
+	    value: function add(x) {
+	      var p = this._partials;
+	      var i = 0;
 
-	// length of vector raised to the power two
-	function geoVecLengthSquare(a, b) {
-	    b = b || [0, 0];
-	    var x = a[0] - b[0];
-	    var y = a[1] - b[1];
-	    return (x * x) + (y * y);
-	}
+	      for (var j = 0; j < this._n && j < 32; j++) {
+	        var y = p[j],
+	            hi = x + y,
+	            lo = Math.abs(x) < Math.abs(y) ? x - (hi - y) : y - (hi - x);
+	        if (lo) p[i++] = lo;
+	        x = hi;
+	      }
 
-	// get a unit vector
-	function geoVecNormalize(a) {
-	    var length = Math.sqrt((a[0] * a[0]) + (a[1] * a[1]));
-	    if (length !== 0) {
-	        return geoVecScale(a, 1 / length);
+	      p[i] = x;
+	      this._n = i + 1;
+	      return this;
 	    }
-	    return [0, 0];
-	}
+	  }, {
+	    key: "valueOf",
+	    value: function valueOf() {
+	      var p = this._partials;
+	      var n = this._n,
+	          x,
+	          y,
+	          lo,
+	          hi = 0;
+
+	      if (n > 0) {
+	        hi = p[--n];
+
+	        while (n > 0) {
+	          x = hi;
+	          y = p[--n];
+	          hi = x + y;
+	          lo = y - (hi - x);
+	          if (lo) break;
+	        }
+
+	        if (n > 0 && (lo < 0 && p[n - 1] < 0 || lo > 0 && p[n - 1] > 0)) {
+	          y = lo * 2;
+	          x = hi + y;
+	          if (y == x - hi) hi = x;
+	        }
+	      }
 
-	// Return the counterclockwise angle in the range (-pi, pi)
-	// between the positive X axis and the line intersecting a and b.
-	function geoVecAngle(a, b) {
-	    return Math.atan2(b[1] - a[1], b[0] - a[0]);
-	}
+	      return hi;
+	    }
+	  }]);
 
-	// dot product
-	function geoVecDot(a, b, origin) {
-	    origin = origin || [0, 0];
-	    var p = geoVecSubtract(a, origin);
-	    var q = geoVecSubtract(b, origin);
-	    return (p[0]) * (q[0]) + (p[1]) * (q[1]);
-	}
+	  return Adder;
+	}();
 
-	// normalized dot product
-	function geoVecNormalizedDot(a, b, origin) {
-	    origin = origin || [0, 0];
-	    var p = geoVecNormalize(geoVecSubtract(a, origin));
-	    var q = geoVecNormalize(geoVecSubtract(b, origin));
-	    return geoVecDot(p, q);
-	}
+	var $$t = _export;
+	var DESCRIPTORS$4 = descriptors;
+	var defineProperties = objectDefineProperties;
 
-	// 2D cross product of OA and OB vectors, returns magnitude of Z vector
-	// Returns a positive value, if OAB makes a counter-clockwise turn,
-	// negative for clockwise turn, and zero if the points are collinear.
-	function geoVecCross(a, b, origin) {
-	    origin = origin || [0, 0];
-	    var p = geoVecSubtract(a, origin);
-	    var q = geoVecSubtract(b, origin);
-	    return (p[0]) * (q[1]) - (p[1]) * (q[0]);
-	}
+	// `Object.defineProperties` method
+	// https://tc39.es/ecma262/#sec-object.defineproperties
+	$$t({ target: 'Object', stat: true, forced: !DESCRIPTORS$4, sham: !DESCRIPTORS$4 }, {
+	  defineProperties: defineProperties
+	});
 
+	var collection = collection$2;
+	var collectionStrong = collectionStrong$2;
+
+	// `Map` constructor
+	// https://tc39.es/ecma262/#sec-map-objects
+	collection('Map', function (init) {
+	  return function Map() { return init(this, arguments.length ? arguments[0] : undefined); };
+	}, collectionStrong);
+
+	var $$s = _export;
+	var aFunction = aFunction$9;
+	var toObject$1 = toObject$i;
+	var toLength$4 = toLength$q;
+	var fails$b = fails$N;
+	var internalSort = arraySort;
+	var arrayMethodIsStrict$2 = arrayMethodIsStrict$8;
+	var FF = engineFfVersion;
+	var IE_OR_EDGE = engineIsIeOrEdge;
+	var V8 = engineV8Version;
+	var WEBKIT = engineWebkitVersion;
+
+	var test = [];
+	var nativeSort = test.sort;
+
+	// IE8-
+	var FAILS_ON_UNDEFINED = fails$b(function () {
+	  test.sort(undefined);
+	});
+	// V8 bug
+	var FAILS_ON_NULL = fails$b(function () {
+	  test.sort(null);
+	});
+	// Old WebKit
+	var STRICT_METHOD$2 = arrayMethodIsStrict$2('sort');
 
-	// find closest orthogonal projection of point onto points array
-	function geoVecProject(a, points) {
-	    var min = Infinity;
-	    var idx;
-	    var target;
-
-	    for (var i = 0; i < points.length - 1; i++) {
-	        var o = points[i];
-	        var s = geoVecSubtract(points[i + 1], o);
-	        var v = geoVecSubtract(a, o);
-	        var proj = geoVecDot(v, s) / geoVecDot(s, s);
-	        var p;
-
-	        if (proj < 0) {
-	            p = o;
-	        } else if (proj > 1) {
-	            p = points[i + 1];
-	        } else {
-	            p = [o[0] + proj * s[0], o[1] + proj * s[1]];
-	        }
+	var STABLE_SORT = !fails$b(function () {
+	  // feature detection can be too slow, so check engines versions
+	  if (V8) return V8 < 70;
+	  if (FF && FF > 3) return;
+	  if (IE_OR_EDGE) return true;
+	  if (WEBKIT) return WEBKIT < 603;
 
-	        var dist = geoVecLength(p, a);
-	        if (dist < min) {
-	            min = dist;
-	            idx = i + 1;
-	            target = p;
-	        }
+	  var result = '';
+	  var code, chr, value, index;
+
+	  // generate an array with more 512 elements (Chakra and old V8 fails only in this case)
+	  for (code = 65; code < 76; code++) {
+	    chr = String.fromCharCode(code);
+
+	    switch (code) {
+	      case 66: case 69: case 70: case 72: value = 3; break;
+	      case 68: case 71: value = 4; break;
+	      default: value = 2;
 	    }
 
-	    if (idx !== undefined) {
-	        return { index: idx, distance: min, target: target };
-	    } else {
-	        return null;
+	    for (index = 0; index < 47; index++) {
+	      test.push({ k: chr + index, v: value });
 	    }
-	}
+	  }
 
-	// Return the counterclockwise angle in the range (-pi, pi)
-	// between the positive X axis and the line intersecting a and b.
-	function geoAngle(a, b, projection) {
-	    return geoVecAngle(projection(a.loc), projection(b.loc));
-	}
+	  test.sort(function (a, b) { return b.v - a.v; });
 
+	  for (index = 0; index < test.length; index++) {
+	    chr = test[index].k.charAt(0);
+	    if (result.charAt(result.length - 1) !== chr) result += chr;
+	  }
 
-	function geoEdgeEqual(a, b) {
-	    return (a[0] === b[0] && a[1] === b[1]) ||
-	        (a[0] === b[1] && a[1] === b[0]);
-	}
+	  return result !== 'DGBEFHACIJK';
+	});
 
+	var FORCED$5 = FAILS_ON_UNDEFINED || !FAILS_ON_NULL || !STRICT_METHOD$2 || !STABLE_SORT;
 
-	// Rotate all points counterclockwise around a pivot point by given angle
-	function geoRotate(points, angle, around) {
-	    return points.map(function(point) {
-	        var radial = geoVecSubtract(point, around);
-	        return [
-	            radial[0] * Math.cos(angle) - radial[1] * Math.sin(angle) + around[0],
-	            radial[0] * Math.sin(angle) + radial[1] * Math.cos(angle) + around[1]
-	        ];
-	    });
-	}
+	var getSortCompare = function (comparefn) {
+	  return function (x, y) {
+	    if (y === undefined) return -1;
+	    if (x === undefined) return 1;
+	    if (comparefn !== undefined) return +comparefn(x, y) || 0;
+	    return String(x) > String(y) ? 1 : -1;
+	  };
+	};
 
+	// `Array.prototype.sort` method
+	// https://tc39.es/ecma262/#sec-array.prototype.sort
+	$$s({ target: 'Array', proto: true, forced: FORCED$5 }, {
+	  sort: function sort(comparefn) {
+	    if (comparefn !== undefined) aFunction(comparefn);
 
-	// Choose the edge with the minimal distance from `point` to its orthogonal
-	// projection onto that edge, if such a projection exists, or the distance to
-	// the closest vertex on that edge. Returns an object with the `index` of the
-	// chosen edge, the chosen `loc` on that edge, and the `distance` to to it.
-	function geoChooseEdge(nodes, point, projection, activeID) {
-	    var dist = geoVecLength;
-	    var points = nodes.map(function(n) { return projection(n.loc); });
-	    var ids = nodes.map(function(n) { return n.id; });
-	    var min = Infinity;
-	    var idx;
-	    var loc;
-
-	    for (var i = 0; i < points.length - 1; i++) {
-	        if (ids[i] === activeID || ids[i + 1] === activeID) { continue; }
-
-	        var o = points[i];
-	        var s = geoVecSubtract(points[i + 1], o);
-	        var v = geoVecSubtract(point, o);
-	        var proj = geoVecDot(v, s) / geoVecDot(s, s);
-	        var p;
-
-	        if (proj < 0) {
-	            p = o;
-	        } else if (proj > 1) {
-	            p = points[i + 1];
-	        } else {
-	            p = [o[0] + proj * s[0], o[1] + proj * s[1]];
-	        }
+	    var array = toObject$1(this);
 
-	        var d = dist(p, point);
-	        if (d < min) {
-	            min = d;
-	            idx = i + 1;
-	            loc = projection.invert(p);
-	        }
+	    if (STABLE_SORT) return comparefn === undefined ? nativeSort.call(array) : nativeSort.call(array, comparefn);
+
+	    var items = [];
+	    var arrayLength = toLength$4(array.length);
+	    var itemsLength, index;
+
+	    for (index = 0; index < arrayLength; index++) {
+	      if (index in array) items.push(array[index]);
 	    }
 
-	    if (idx !== undefined) {
-	        return { index: idx, distance: min, loc: loc };
-	    } else {
-	        return null;
+	    items = internalSort(items, getSortCompare(comparefn));
+	    itemsLength = items.length;
+	    index = 0;
+
+	    while (index < itemsLength) array[index] = items[index++];
+	    while (index < arrayLength) delete array[index++];
+
+	    return array;
+	  }
+	});
+
+	var e10 = Math.sqrt(50),
+	    e5 = Math.sqrt(10),
+	    e2 = Math.sqrt(2);
+	function ticks (start, stop, count) {
+	  var reverse,
+	      i = -1,
+	      n,
+	      ticks,
+	      step;
+	  stop = +stop, start = +start, count = +count;
+	  if (start === stop && count > 0) return [start];
+	  if (reverse = stop < start) n = start, start = stop, stop = n;
+	  if ((step = tickIncrement(start, stop, count)) === 0 || !isFinite(step)) return [];
+
+	  if (step > 0) {
+	    var r0 = Math.round(start / step),
+	        r1 = Math.round(stop / step);
+	    if (r0 * step < start) ++r0;
+	    if (r1 * step > stop) --r1;
+	    ticks = new Array(n = r1 - r0 + 1);
+
+	    while (++i < n) {
+	      ticks[i] = (r0 + i) * step;
 	    }
-	}
+	  } else {
+	    step = -step;
 
+	    var _r = Math.round(start * step),
+	        _r2 = Math.round(stop * step);
 
-	// Test active (dragged or drawing) segments against inactive segments
-	// This is used to test e.g. multipolygon rings that cross
-	// `activeNodes` is the ring containing the activeID being dragged.
-	// `inactiveNodes` is the other ring to test against
-	function geoHasLineIntersections(activeNodes, inactiveNodes, activeID) {
-	    var actives = [];
-	    var inactives = [];
-	    var j, k, n1, n2, segment;
-
-	    // gather active segments (only segments in activeNodes that contain the activeID)
-	    for (j = 0; j < activeNodes.length - 1; j++) {
-	        n1 = activeNodes[j];
-	        n2 = activeNodes[j+1];
-	        segment = [n1.loc, n2.loc];
-	        if (n1.id === activeID || n2.id === activeID) {
-	            actives.push(segment);
-	        }
-	    }
-
-	    // gather inactive segments
-	    for (j = 0; j < inactiveNodes.length - 1; j++) {
-	        n1 = inactiveNodes[j];
-	        n2 = inactiveNodes[j+1];
-	        segment = [n1.loc, n2.loc];
-	        inactives.push(segment);
-	    }
-
-	    // test
-	    for (j = 0; j < actives.length; j++) {
-	        for (k = 0; k < inactives.length; k++) {
-	            var p = actives[j];
-	            var q = inactives[k];
-	            var hit = geoLineIntersection(p, q);
-	            if (hit) {
-	                return true;
-	            }
-	        }
+	    if (_r / step < start) ++_r;
+	    if (_r2 / step > stop) --_r2;
+	    ticks = new Array(n = _r2 - _r + 1);
+
+	    while (++i < n) {
+	      ticks[i] = (_r + i) / step;
 	    }
+	  }
 
-	    return false;
+	  if (reverse) ticks.reverse();
+	  return ticks;
+	}
+	function tickIncrement(start, stop, count) {
+	  var step = (stop - start) / Math.max(0, count),
+	      power = Math.floor(Math.log(step) / Math.LN10),
+	      error = step / Math.pow(10, power);
+	  return power >= 0 ? (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1) * Math.pow(10, power) : -Math.pow(10, -power) / (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1);
+	}
+	function tickStep(start, stop, count) {
+	  var step0 = Math.abs(stop - start) / Math.max(0, count),
+	      step1 = Math.pow(10, Math.floor(Math.log(step0) / Math.LN10)),
+	      error = step0 / step1;
+	  if (error >= e10) step1 *= 10;else if (error >= e5) step1 *= 5;else if (error >= e2) step1 *= 2;
+	  return stop < start ? -step1 : step1;
 	}
 
+	function max(values, valueof) {
+	  var max;
 
-	// Test active (dragged or drawing) segments against inactive segments
-	// This is used to test whether a way intersects with itself.
-	function geoHasSelfIntersections(nodes, activeID) {
-	    var actives = [];
-	    var inactives = [];
-	    var j, k;
-
-	    // group active and passive segments along the nodes
-	    for (j = 0; j < nodes.length - 1; j++) {
-	        var n1 = nodes[j];
-	        var n2 = nodes[j+1];
-	        var segment = [n1.loc, n2.loc];
-	        if (n1.id === activeID || n2.id === activeID) {
-	            actives.push(segment);
-	        } else {
-	            inactives.push(segment);
+	  if (valueof === undefined) {
+	    var _iterator = _createForOfIteratorHelper(values),
+	        _step;
+
+	    try {
+	      for (_iterator.s(); !(_step = _iterator.n()).done;) {
+	        var value = _step.value;
+
+	        if (value != null && (max < value || max === undefined && value >= value)) {
+	          max = value;
 	        }
+	      }
+	    } catch (err) {
+	      _iterator.e(err);
+	    } finally {
+	      _iterator.f();
 	    }
+	  } else {
+	    var index = -1;
 
-	    // test
-	    for (j = 0; j < actives.length; j++) {
-	        for (k = 0; k < inactives.length; k++) {
-	            var p = actives[j];
-	            var q = inactives[k];
-	            // skip if segments share an endpoint
-	            if (geoVecEqual(p[1], q[0]) || geoVecEqual(p[0], q[1]) ||
-	                geoVecEqual(p[0], q[0]) || geoVecEqual(p[1], q[1]) ) {
-	                continue;
-	            }
+	    var _iterator2 = _createForOfIteratorHelper(values),
+	        _step2;
 
-	            var hit = geoLineIntersection(p, q);
-	            if (hit) {
-	                var epsilon = 1e-8;
-	                // skip if the hit is at the segment's endpoint
-	                if (geoVecEqual(p[1], hit, epsilon) || geoVecEqual(p[0], hit, epsilon) ||
-	                    geoVecEqual(q[1], hit, epsilon) || geoVecEqual(q[0], hit, epsilon) ) {
-	                    continue;
-	                } else {
-	                    return true;
-	                }
-	            }
+	    try {
+	      for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
+	        var _value = _step2.value;
+
+	        if ((_value = valueof(_value, ++index, values)) != null && (max < _value || max === undefined && _value >= _value)) {
+	          max = _value;
 	        }
+	      }
+	    } catch (err) {
+	      _iterator2.e(err);
+	    } finally {
+	      _iterator2.f();
 	    }
+	  }
 
-	    return false;
+	  return max;
 	}
 
+	function min$2(values, valueof) {
+	  var min;
 
-	// Return the intersection point of 2 line segments.
-	// From https://github.com/pgkelley4/line-segments-intersect
-	// This uses the vector cross product approach described below:
-	//  http://stackoverflow.com/a/565282/786339
-	function geoLineIntersection(a, b) {
-	    var p = [a[0][0], a[0][1]];
-	    var p2 = [a[1][0], a[1][1]];
-	    var q = [b[0][0], b[0][1]];
-	    var q2 = [b[1][0], b[1][1]];
-	    var r = geoVecSubtract(p2, p);
-	    var s = geoVecSubtract(q2, q);
-	    var uNumerator = geoVecCross(geoVecSubtract(q, p), r);
-	    var denominator = geoVecCross(r, s);
+	  if (valueof === undefined) {
+	    var _iterator = _createForOfIteratorHelper(values),
+	        _step;
 
-	    if (uNumerator && denominator) {
-	        var u = uNumerator / denominator;
-	        var t = geoVecCross(geoVecSubtract(q, p), s) / denominator;
+	    try {
+	      for (_iterator.s(); !(_step = _iterator.n()).done;) {
+	        var value = _step.value;
 
-	        if ((t >= 0) && (t <= 1) && (u >= 0) && (u <= 1)) {
-	            return geoVecInterp(p, p2, t);
+	        if (value != null && (min > value || min === undefined && value >= value)) {
+	          min = value;
 	        }
+	      }
+	    } catch (err) {
+	      _iterator.e(err);
+	    } finally {
+	      _iterator.f();
 	    }
+	  } else {
+	    var index = -1;
 
-	    return null;
-	}
+	    var _iterator2 = _createForOfIteratorHelper(values),
+	        _step2;
 
+	    try {
+	      for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
+	        var _value = _step2.value;
 
-	function geoPathIntersections(path1, path2) {
-	    var intersections = [];
-	    for (var i = 0; i < path1.length - 1; i++) {
-	        for (var j = 0; j < path2.length - 1; j++) {
-	            var a = [ path1[i], path1[i+1] ];
-	            var b = [ path2[j], path2[j+1] ];
-	            var hit = geoLineIntersection(a, b);
-	            if (hit) {
-	                intersections.push(hit);
-	            }
+	        if ((_value = valueof(_value, ++index, values)) != null && (min > _value || min === undefined && _value >= _value)) {
+	          min = _value;
 	        }
+	      }
+	    } catch (err) {
+	      _iterator2.e(err);
+	    } finally {
+	      _iterator2.f();
 	    }
-	    return intersections;
+	  }
+
+	  return min;
 	}
 
-	function geoPathHasIntersections(path1, path2) {
-	    for (var i = 0; i < path1.length - 1; i++) {
-	        for (var j = 0; j < path2.length - 1; j++) {
-	            var a = [ path1[i], path1[i+1] ];
-	            var b = [ path2[j], path2[j+1] ];
-	            var hit = geoLineIntersection(a, b);
-	            if (hit) {
-	                return true;
-	            }
-	        }
+	// ISC license, Copyright 2018 Vladimir Agafonkin.
+
+	function quickselect$3(array, k) {
+	  var left = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0;
+	  var right = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : array.length - 1;
+	  var compare = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : d3_ascending;
+
+	  while (right > left) {
+	    if (right - left > 600) {
+	      var n = right - left + 1;
+	      var m = k - left + 1;
+	      var z = Math.log(n);
+	      var s = 0.5 * Math.exp(2 * z / 3);
+	      var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
+	      var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
+	      var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
+	      quickselect$3(array, k, newLeft, newRight, compare);
 	    }
-	    return false;
-	}
 
+	    var t = array[k];
+	    var i = left;
+	    var j = right;
+	    swap$1(array, left, k);
+	    if (compare(array[right], t) > 0) swap$1(array, left, right);
 
-	// Return whether point is contained in polygon.
-	//
-	// `point` should be a 2-item array of coordinates.
-	// `polygon` should be an array of 2-item arrays of coordinates.
-	//
-	// From https://github.com/substack/point-in-polygon.
-	// ray-casting algorithm based on
-	// http://www.ecse.rpi.edu/Homepages/wrf/Research/Short_Notes/pnpoly.html
-	//
-	function geoPointInPolygon(point, polygon) {
-	    var x = point[0];
-	    var y = point[1];
-	    var inside = false;
+	    while (i < j) {
+	      swap$1(array, i, j), ++i, --j;
 
-	    for (var i = 0, j = polygon.length - 1; i < polygon.length; j = i++) {
-	        var xi = polygon[i][0];
-	        var yi = polygon[i][1];
-	        var xj = polygon[j][0];
-	        var yj = polygon[j][1];
+	      while (compare(array[i], t) < 0) {
+	        ++i;
+	      }
 
-	        var intersect = ((yi > y) !== (yj > y)) &&
-	            (x < (xj - xi) * (y - yi) / (yj - yi) + xi);
-	        if (intersect) { inside = !inside; }
+	      while (compare(array[j], t) > 0) {
+	        --j;
+	      }
 	    }
 
-	    return inside;
-	}
-
+	    if (compare(array[left], t) === 0) swap$1(array, left, j);else ++j, swap$1(array, j, right);
+	    if (j <= k) left = j + 1;
+	    if (k <= j) right = j - 1;
+	  }
 
-	function geoPolygonContainsPolygon(outer, inner) {
-	    return inner.every(function(point) {
-	        return geoPointInPolygon(point, outer);
-	    });
+	  return array;
 	}
 
+	function swap$1(array, i, j) {
+	  var t = array[i];
+	  array[i] = array[j];
+	  array[j] = t;
+	}
 
-	function geoPolygonIntersectsPolygon(outer, inner, checkSegments) {
-	    function testPoints(outer, inner) {
-	        return inner.some(function(point) {
-	            return geoPointInPolygon(point, outer);
-	        });
-	    }
+	function quantile(values, p, valueof) {
+	  values = Float64Array.from(numbers(values, valueof));
+	  if (!(n = values.length)) return;
+	  if ((p = +p) <= 0 || n < 2) return min$2(values);
+	  if (p >= 1) return max(values);
+	  var n,
+	      i = (n - 1) * p,
+	      i0 = Math.floor(i),
+	      value0 = max(quickselect$3(values, i0).subarray(0, i0 + 1)),
+	      value1 = min$2(values.subarray(i0 + 1));
+	  return value0 + (value1 - value0) * (i - i0);
+	}
 
-	   return testPoints(outer, inner) || (!!checkSegments && geoPathHasIntersections(outer, inner));
+	function d3_median (values, valueof) {
+	  return quantile(values, 0.5, valueof);
 	}
 
+	var _marked$2 = /*#__PURE__*/regeneratorRuntime.mark(flatten);
 
-	// http://gis.stackexchange.com/questions/22895/finding-minimum-area-rectangle-for-given-points
-	// http://gis.stackexchange.com/questions/3739/generalisation-strategies-for-building-outlines/3756#3756
-	function geoGetSmallestSurroundingRectangle(points) {
-	    var hull = d3_polygonHull(points);
-	    var centroid = d3_polygonCentroid(hull);
-	    var minArea = Infinity;
-	    var ssrExtent = [];
-	    var ssrAngle = 0;
-	    var c1 = hull[0];
-
-	    for (var i = 0; i <= hull.length - 1; i++) {
-	        var c2 = (i === hull.length - 1) ? hull[0] : hull[i + 1];
-	        var angle = Math.atan2(c2[1] - c1[1], c2[0] - c1[0]);
-	        var poly = geoRotate(hull, -angle, centroid);
-	        var extent = poly.reduce(function(extent, point) {
-	            return extent.extend(geoExtent(point));
-	        }, geoExtent());
-
-	        var area = extent.area();
-	        if (area < minArea) {
-	            minArea = area;
-	            ssrExtent = extent;
-	            ssrAngle = angle;
-	        }
-	        c1 = c2;
-	    }
+	function flatten(arrays) {
+	  var _iterator, _step, array;
 
-	    return {
-	        poly: geoRotate(ssrExtent.polygon(), ssrAngle, centroid),
-	        angle: ssrAngle
-	    };
-	}
+	  return regeneratorRuntime.wrap(function flatten$(_context) {
+	    while (1) {
+	      switch (_context.prev = _context.next) {
+	        case 0:
+	          _iterator = _createForOfIteratorHelper(arrays);
+	          _context.prev = 1;
 
+	          _iterator.s();
 
-	function geoPathLength(path) {
-	    var length = 0;
-	    for (var i = 0; i < path.length - 1; i++) {
-	        length += geoVecLength(path[i], path[i + 1]);
-	    }
-	    return length;
-	}
+	        case 3:
+	          if ((_step = _iterator.n()).done) {
+	            _context.next = 8;
+	            break;
+	          }
 
+	          array = _step.value;
+	          return _context.delegateYield(array, "t0", 6);
 
-	// If the given point is at the edge of the padded viewport,
-	// return a vector that will nudge the viewport in that direction
-	function geoViewportEdge(point, dimensions) {
-	    var pad = [80, 20, 50, 20];   // top, right, bottom, left
-	    var x = 0;
-	    var y = 0;
-
-	    if (point[0] > dimensions[0] - pad[1])
-	        { x = -10; }
-	    if (point[0] < pad[3])
-	        { x = 10; }
-	    if (point[1] > dimensions[1] - pad[2])
-	        { y = -10; }
-	    if (point[1] < pad[0])
-	        { y = 10; }
-
-	    if (x || y) {
-	        return [x, y];
-	    } else {
-	        return null;
-	    }
-	}
+	        case 6:
+	          _context.next = 3;
+	          break;
 
-	var noop$3 = {value: function() {}};
+	        case 8:
+	          _context.next = 13;
+	          break;
 
-	function dispatch() {
-	  var arguments$1 = arguments;
+	        case 10:
+	          _context.prev = 10;
+	          _context.t1 = _context["catch"](1);
 
-	  for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
-	    if (!(t = arguments$1[i] + "") || (t in _) || /[\s.]/.test(t)) { throw new Error("illegal type: " + t); }
-	    _[t] = [];
-	  }
-	  return new Dispatch(_);
-	}
+	          _iterator.e(_context.t1);
 
-	function Dispatch(_) {
-	  this._ = _;
-	}
+	        case 13:
+	          _context.prev = 13;
 
-	function parseTypenames(typenames, types) {
-	  return typenames.trim().split(/^|\s+/).map(function(t) {
-	    var name = "", i = t.indexOf(".");
-	    if (i >= 0) { name = t.slice(i + 1), t = t.slice(0, i); }
-	    if (t && !types.hasOwnProperty(t)) { throw new Error("unknown type: " + t); }
-	    return {type: t, name: name};
-	  });
-	}
+	          _iterator.f();
 
-	Dispatch.prototype = dispatch.prototype = {
-	  constructor: Dispatch,
-	  on: function(typename, callback) {
-	    var _ = this._,
-	        T = parseTypenames(typename + "", _),
-	        t,
-	        i = -1,
-	        n = T.length;
+	          return _context.finish(13);
 
-	    // If no callback was specified, return the callback of the given type and name.
-	    if (arguments.length < 2) {
-	      while (++i < n) { if ((t = (typename = T[i]).type) && (t = get$1(_[t], typename.name))) { return t; } }
-	      return;
+	        case 16:
+	        case "end":
+	          return _context.stop();
+	      }
 	    }
+	  }, _marked$2, null, [[1, 10, 13, 16]]);
+	}
 
-	    // If a type was specified, set the callback for the given type and name.
-	    // Otherwise, if a null callback was specified, remove callbacks of the given name.
-	    if (callback != null && typeof callback !== "function") { throw new Error("invalid callback: " + callback); }
-	    while (++i < n) {
-	      if (t = (typename = T[i]).type) { _[t] = set(_[t], typename.name, callback); }
-	      else if (callback == null) { for (t in _) { _[t] = set(_[t], typename.name, null); } }
-	    }
+	function merge$4(arrays) {
+	  return Array.from(flatten(arrays));
+	}
 
-	    return this;
-	  },
-	  copy: function() {
-	    var copy = {}, _ = this._;
-	    for (var t in _) { copy[t] = _[t].slice(); }
-	    return new Dispatch(copy);
-	  },
-	  call: function(type, that) {
-	    var arguments$1 = arguments;
+	function range$1 (start, stop, step) {
+	  start = +start, stop = +stop, step = (n = arguments.length) < 2 ? (stop = start, start = 0, 1) : n < 3 ? 1 : +step;
+	  var i = -1,
+	      n = Math.max(0, Math.ceil((stop - start) / step)) | 0,
+	      range = new Array(n);
 
-	    if ((n = arguments.length - 2) > 0) { for (var args = new Array(n), i = 0, n, t; i < n; ++i) { args[i] = arguments$1[i + 2]; } }
-	    if (!this._.hasOwnProperty(type)) { throw new Error("unknown type: " + type); }
-	    for (t = this._[type], i = 0, n = t.length; i < n; ++i) { t[i].value.apply(that, args); }
-	  },
-	  apply: function(type, that, args) {
-	    if (!this._.hasOwnProperty(type)) { throw new Error("unknown type: " + type); }
-	    for (var t = this._[type], i = 0, n = t.length; i < n; ++i) { t[i].value.apply(that, args); }
+	  while (++i < n) {
+	    range[i] = start + i * step;
 	  }
-	};
 
-	function get$1(type, name) {
-	  for (var i = 0, n = type.length, c; i < n; ++i) {
-	    if ((c = type[i]).name === name) {
-	      return c.value;
-	    }
-	  }
+	  return range;
 	}
 
-	function set(type, name, callback) {
-	  for (var i = 0, n = type.length; i < n; ++i) {
-	    if (type[i].name === name) {
-	      type[i] = noop$3, type = type.slice(0, i).concat(type.slice(i + 1));
-	      break;
-	    }
-	  }
-	  if (callback != null) { type.push({name: name, value: callback}); }
-	  return type;
-	}
+	// `SameValue` abstract operation
+	// https://tc39.es/ecma262/#sec-samevalue
+	// eslint-disable-next-line es/no-object-is -- safe
+	var sameValue$1 = Object.is || function is(x, y) {
+	  // eslint-disable-next-line no-self-compare -- NaN check
+	  return x === y ? x !== 0 || 1 / x === 1 / y : x != x && y != y;
+	};
 
-	var xhtml = "http://www.w3.org/1999/xhtml";
+	var $$r = _export;
 
-	var namespaces = {
-	  svg: "http://www.w3.org/2000/svg",
-	  xhtml: xhtml,
-	  xlink: "http://www.w3.org/1999/xlink",
-	  xml: "http://www.w3.org/XML/1998/namespace",
-	  xmlns: "http://www.w3.org/2000/xmlns/"
+	// eslint-disable-next-line es/no-math-hypot -- required for testing
+	var $hypot = Math.hypot;
+	var abs$3 = Math.abs;
+	var sqrt$1 = Math.sqrt;
+
+	// Chrome 77 bug
+	// https://bugs.chromium.org/p/v8/issues/detail?id=9546
+	var BUGGY = !!$hypot && $hypot(Infinity, NaN) !== Infinity;
+
+	// `Math.hypot` method
+	// https://tc39.es/ecma262/#sec-math.hypot
+	$$r({ target: 'Math', stat: true, forced: BUGGY }, {
+	  // eslint-disable-next-line no-unused-vars -- required for `.length`
+	  hypot: function hypot(value1, value2) {
+	    var sum = 0;
+	    var i = 0;
+	    var aLen = arguments.length;
+	    var larg = 0;
+	    var arg, div;
+	    while (i < aLen) {
+	      arg = abs$3(arguments[i++]);
+	      if (larg < arg) {
+	        div = larg / arg;
+	        sum = sum * div * div + 1;
+	        larg = arg;
+	      } else if (arg > 0) {
+	        div = arg / larg;
+	        sum += div * div;
+	      } else sum += arg;
+	    }
+	    return larg === Infinity ? Infinity : larg * sqrt$1(sum);
+	  }
+	});
+
+	// `Math.sign` method implementation
+	// https://tc39.es/ecma262/#sec-math.sign
+	// eslint-disable-next-line es/no-math-sign -- safe
+	var mathSign = Math.sign || function sign(x) {
+	  // eslint-disable-next-line no-self-compare -- NaN check
+	  return (x = +x) == 0 || x != x ? x : x < 0 ? -1 : 1;
 	};
 
-	function namespace(name) {
-	  var prefix = name += "", i = prefix.indexOf(":");
-	  if (i >= 0 && (prefix = name.slice(0, i)) !== "xmlns") { name = name.slice(i + 1); }
-	  return namespaces.hasOwnProperty(prefix) ? {space: namespaces[prefix], local: name} : name;
-	}
+	var $$q = _export;
+	var sign$1 = mathSign;
 
-	function creatorInherit(name) {
-	  return function() {
-	    var document = this.ownerDocument,
-	        uri = this.namespaceURI;
-	    return uri === xhtml && document.documentElement.namespaceURI === xhtml
-	        ? document.createElement(name)
-	        : document.createElementNS(uri, name);
-	  };
-	}
+	// `Math.sign` method
+	// https://tc39.es/ecma262/#sec-math.sign
+	$$q({ target: 'Math', stat: true }, {
+	  sign: sign$1
+	});
 
-	function creatorFixed(fullname) {
-	  return function() {
-	    return this.ownerDocument.createElementNS(fullname.space, fullname.local);
-	  };
+	var epsilon$1 = 1e-6;
+	var epsilon2$1 = 1e-12;
+	var pi = Math.PI;
+	var halfPi = pi / 2;
+	var quarterPi = pi / 4;
+	var tau = pi * 2;
+	var degrees$1 = 180 / pi;
+	var radians = pi / 180;
+	var abs$2 = Math.abs;
+	var atan = Math.atan;
+	var atan2 = Math.atan2;
+	var cos = Math.cos;
+	var exp$2 = Math.exp;
+	var log$1 = Math.log;
+	var sin = Math.sin;
+	var sign = Math.sign || function (x) {
+	  return x > 0 ? 1 : x < 0 ? -1 : 0;
+	};
+	var sqrt = Math.sqrt;
+	var tan = Math.tan;
+	function acos(x) {
+	  return x > 1 ? 0 : x < -1 ? pi : Math.acos(x);
 	}
-
-	function creator(name) {
-	  var fullname = namespace(name);
-	  return (fullname.local
-	      ? creatorFixed
-	      : creatorInherit)(fullname);
+	function asin(x) {
+	  return x > 1 ? halfPi : x < -1 ? -halfPi : Math.asin(x);
 	}
 
-	function none() {}
+	function noop$1() {}
 
-	function selector(selector) {
-	  return selector == null ? none : function() {
-	    return this.querySelector(selector);
-	  };
+	function streamGeometry(geometry, stream) {
+	  if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) {
+	    streamGeometryType[geometry.type](geometry, stream);
+	  }
 	}
 
-	function selection_select(select) {
-	  if (typeof select !== "function") { select = selector(select); }
+	var streamObjectType = {
+	  Feature: function Feature(object, stream) {
+	    streamGeometry(object.geometry, stream);
+	  },
+	  FeatureCollection: function FeatureCollection(object, stream) {
+	    var features = object.features,
+	        i = -1,
+	        n = features.length;
 
-	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
-	      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
-	        if ("__data__" in node) { subnode.__data__ = node.__data__; }
-	        subgroup[i] = subnode;
-	      }
+	    while (++i < n) {
+	      streamGeometry(features[i].geometry, stream);
 	    }
 	  }
+	};
+	var streamGeometryType = {
+	  Sphere: function Sphere(object, stream) {
+	    stream.sphere();
+	  },
+	  Point: function Point(object, stream) {
+	    object = object.coordinates;
+	    stream.point(object[0], object[1], object[2]);
+	  },
+	  MultiPoint: function MultiPoint(object, stream) {
+	    var coordinates = object.coordinates,
+	        i = -1,
+	        n = coordinates.length;
 
-	  return new Selection(subgroups, this._parents);
-	}
-
-	function empty() {
-	  return [];
-	}
+	    while (++i < n) {
+	      object = coordinates[i], stream.point(object[0], object[1], object[2]);
+	    }
+	  },
+	  LineString: function LineString(object, stream) {
+	    streamLine(object.coordinates, stream, 0);
+	  },
+	  MultiLineString: function MultiLineString(object, stream) {
+	    var coordinates = object.coordinates,
+	        i = -1,
+	        n = coordinates.length;
 
-	function selectorAll(selector) {
-	  return selector == null ? empty : function() {
-	    return this.querySelectorAll(selector);
-	  };
-	}
+	    while (++i < n) {
+	      streamLine(coordinates[i], stream, 0);
+	    }
+	  },
+	  Polygon: function Polygon(object, stream) {
+	    streamPolygon(object.coordinates, stream);
+	  },
+	  MultiPolygon: function MultiPolygon(object, stream) {
+	    var coordinates = object.coordinates,
+	        i = -1,
+	        n = coordinates.length;
 
-	function selection_selectAll(select) {
-	  if (typeof select !== "function") { select = selectorAll(select); }
+	    while (++i < n) {
+	      streamPolygon(coordinates[i], stream);
+	    }
+	  },
+	  GeometryCollection: function GeometryCollection(object, stream) {
+	    var geometries = object.geometries,
+	        i = -1,
+	        n = geometries.length;
 
-	  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
-	      if (node = group[i]) {
-	        subgroups.push(select.call(node, node.__data__, i, group));
-	        parents.push(node);
-	      }
+	    while (++i < n) {
+	      streamGeometry(geometries[i], stream);
 	    }
 	  }
+	};
 
-	  return new Selection(subgroups, parents);
-	}
+	function streamLine(coordinates, stream, closed) {
+	  var i = -1,
+	      n = coordinates.length - closed,
+	      coordinate;
+	  stream.lineStart();
 
-	function matcher(selector) {
-	  return function() {
-	    return this.matches(selector);
-	  };
+	  while (++i < n) {
+	    coordinate = coordinates[i], stream.point(coordinate[0], coordinate[1], coordinate[2]);
+	  }
+
+	  stream.lineEnd();
 	}
 
-	function selection_filter(match) {
-	  if (typeof match !== "function") { match = matcher(match); }
+	function streamPolygon(coordinates, stream) {
+	  var i = -1,
+	      n = coordinates.length;
+	  stream.polygonStart();
 
-	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
-	      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
-	        subgroup.push(node);
-	      }
-	    }
+	  while (++i < n) {
+	    streamLine(coordinates[i], stream, 1);
 	  }
 
-	  return new Selection(subgroups, this._parents);
-	}
-
-	function sparse(update) {
-	  return new Array(update.length);
+	  stream.polygonEnd();
 	}
 
-	function selection_enter() {
-	  return new Selection(this._enter || this._groups.map(sparse), this._parents);
+	function d3_geoStream (object, stream) {
+	  if (object && streamObjectType.hasOwnProperty(object.type)) {
+	    streamObjectType[object.type](object, stream);
+	  } else {
+	    streamGeometry(object, stream);
+	  }
 	}
 
-	function EnterNode(parent, datum) {
-	  this.ownerDocument = parent.ownerDocument;
-	  this.namespaceURI = parent.namespaceURI;
-	  this._next = null;
-	  this._parent = parent;
-	  this.__data__ = datum;
-	}
+	var areaRingSum$1 = new Adder(); // hello?
 
-	EnterNode.prototype = {
-	  constructor: EnterNode,
-	  appendChild: function(child) { return this._parent.insertBefore(child, this._next); },
-	  insertBefore: function(child, next) { return this._parent.insertBefore(child, next); },
-	  querySelector: function(selector) { return this._parent.querySelector(selector); },
-	  querySelectorAll: function(selector) { return this._parent.querySelectorAll(selector); }
+	var areaSum$1 = new Adder(),
+	    lambda00$1,
+	    phi00$1,
+	    lambda0$2,
+	    cosPhi0$1,
+	    sinPhi0$1;
+	var areaStream$1 = {
+	  point: noop$1,
+	  lineStart: noop$1,
+	  lineEnd: noop$1,
+	  polygonStart: function polygonStart() {
+	    areaRingSum$1 = new Adder();
+	    areaStream$1.lineStart = areaRingStart$1;
+	    areaStream$1.lineEnd = areaRingEnd$1;
+	  },
+	  polygonEnd: function polygonEnd() {
+	    var areaRing = +areaRingSum$1;
+	    areaSum$1.add(areaRing < 0 ? tau + areaRing : areaRing);
+	    this.lineStart = this.lineEnd = this.point = noop$1;
+	  },
+	  sphere: function sphere() {
+	    areaSum$1.add(tau);
+	  }
 	};
 
-	function constant(x) {
-	  return function() {
-	    return x;
-	  };
+	function areaRingStart$1() {
+	  areaStream$1.point = areaPointFirst$1;
 	}
 
-	var keyPrefix = "$"; // Protect against keys like “__proto__”.
+	function areaRingEnd$1() {
+	  areaPoint$1(lambda00$1, phi00$1);
+	}
 
-	function bindIndex(parent, group, enter, update, exit, data) {
-	  var i = 0,
-	      node,
-	      groupLength = group.length,
-	      dataLength = data.length;
+	function areaPointFirst$1(lambda, phi) {
+	  areaStream$1.point = areaPoint$1;
+	  lambda00$1 = lambda, phi00$1 = phi;
+	  lambda *= radians, phi *= radians;
+	  lambda0$2 = lambda, cosPhi0$1 = cos(phi = phi / 2 + quarterPi), sinPhi0$1 = sin(phi);
+	}
 
-	  // Put any non-null nodes that fit into update.
-	  // Put any null nodes into enter.
-	  // Put any remaining data into enter.
-	  for (; i < dataLength; ++i) {
-	    if (node = group[i]) {
-	      node.__data__ = data[i];
-	      update[i] = node;
-	    } else {
-	      enter[i] = new EnterNode(parent, data[i]);
-	    }
-	  }
+	function areaPoint$1(lambda, phi) {
+	  lambda *= radians, phi *= radians;
+	  phi = phi / 2 + quarterPi; // half the angular distance from south pole
+	  // Spherical excess E for a spherical triangle with vertices: south pole,
+	  // previous point, current point.  Uses a formula derived from Cagnoli’s
+	  // theorem.  See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2).
 
-	  // Put any non-null nodes that don’t fit into exit.
-	  for (; i < groupLength; ++i) {
-	    if (node = group[i]) {
-	      exit[i] = node;
-	    }
-	  }
+	  var dLambda = lambda - lambda0$2,
+	      sdLambda = dLambda >= 0 ? 1 : -1,
+	      adLambda = sdLambda * dLambda,
+	      cosPhi = cos(phi),
+	      sinPhi = sin(phi),
+	      k = sinPhi0$1 * sinPhi,
+	      u = cosPhi0$1 * cosPhi + k * cos(adLambda),
+	      v = k * sdLambda * sin(adLambda);
+	  areaRingSum$1.add(atan2(v, u)); // Advance the previous points.
+
+	  lambda0$2 = lambda, cosPhi0$1 = cosPhi, sinPhi0$1 = sinPhi;
 	}
 
-	function bindKey(parent, group, enter, update, exit, data, key) {
-	  var i,
-	      node,
-	      nodeByKeyValue = {},
-	      groupLength = group.length,
-	      dataLength = data.length,
-	      keyValues = new Array(groupLength),
-	      keyValue;
+	function d3_geoArea (object) {
+	  areaSum$1 = new Adder();
+	  d3_geoStream(object, areaStream$1);
+	  return areaSum$1 * 2;
+	}
 
-	  // Compute the key for each node.
-	  // If multiple nodes have the same key, the duplicates are added to exit.
-	  for (i = 0; i < groupLength; ++i) {
-	    if (node = group[i]) {
-	      keyValues[i] = keyValue = keyPrefix + key.call(node, node.__data__, i, group);
-	      if (keyValue in nodeByKeyValue) {
-	        exit[i] = node;
-	      } else {
-	        nodeByKeyValue[keyValue] = node;
-	      }
-	    }
-	  }
+	function spherical(cartesian) {
+	  return [atan2(cartesian[1], cartesian[0]), asin(cartesian[2])];
+	}
+	function cartesian(spherical) {
+	  var lambda = spherical[0],
+	      phi = spherical[1],
+	      cosPhi = cos(phi);
+	  return [cosPhi * cos(lambda), cosPhi * sin(lambda), sin(phi)];
+	}
+	function cartesianDot(a, b) {
+	  return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
+	}
+	function cartesianCross(a, b) {
+	  return [a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]];
+	} // TODO return a
 
-	  // Compute the key for each datum.
-	  // If there a node associated with this key, join and add it to update.
-	  // If there is not (or the key is a duplicate), add it to enter.
-	  for (i = 0; i < dataLength; ++i) {
-	    keyValue = keyPrefix + key.call(parent, data[i], i, data);
-	    if (node = nodeByKeyValue[keyValue]) {
-	      update[i] = node;
-	      node.__data__ = data[i];
-	      nodeByKeyValue[keyValue] = null;
-	    } else {
-	      enter[i] = new EnterNode(parent, data[i]);
-	    }
-	  }
+	function cartesianAddInPlace(a, b) {
+	  a[0] += b[0], a[1] += b[1], a[2] += b[2];
+	}
+	function cartesianScale(vector, k) {
+	  return [vector[0] * k, vector[1] * k, vector[2] * k];
+	} // TODO return d
 
-	  // Add any remaining nodes that were not bound to data to exit.
-	  for (i = 0; i < groupLength; ++i) {
-	    if ((node = group[i]) && (nodeByKeyValue[keyValues[i]] === node)) {
-	      exit[i] = node;
-	    }
-	  }
+	function cartesianNormalizeInPlace(d) {
+	  var l = sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
+	  d[0] /= l, d[1] /= l, d[2] /= l;
 	}
 
-	function selection_data(value, key) {
-	  if (!value) {
-	    data = new Array(this.size()), j = -1;
-	    this.each(function(d) { data[++j] = d; });
-	    return data;
+	var lambda0$1, phi0, lambda1, phi1, // bounds
+	lambda2, // previous lambda-coordinate
+	lambda00, phi00, // first point
+	p0, // previous 3D point
+	deltaSum, ranges, range;
+	var boundsStream$1 = {
+	  point: boundsPoint$1,
+	  lineStart: boundsLineStart,
+	  lineEnd: boundsLineEnd,
+	  polygonStart: function polygonStart() {
+	    boundsStream$1.point = boundsRingPoint;
+	    boundsStream$1.lineStart = boundsRingStart;
+	    boundsStream$1.lineEnd = boundsRingEnd;
+	    deltaSum = new Adder();
+	    areaStream$1.polygonStart();
+	  },
+	  polygonEnd: function polygonEnd() {
+	    areaStream$1.polygonEnd();
+	    boundsStream$1.point = boundsPoint$1;
+	    boundsStream$1.lineStart = boundsLineStart;
+	    boundsStream$1.lineEnd = boundsLineEnd;
+	    if (areaRingSum$1 < 0) lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);else if (deltaSum > epsilon$1) phi1 = 90;else if (deltaSum < -epsilon$1) phi0 = -90;
+	    range[0] = lambda0$1, range[1] = lambda1;
+	  },
+	  sphere: function sphere() {
+	    lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);
 	  }
+	};
 
-	  var bind = key ? bindKey : bindIndex,
-	      parents = this._parents,
-	      groups = this._groups;
+	function boundsPoint$1(lambda, phi) {
+	  ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
+	  if (phi < phi0) phi0 = phi;
+	  if (phi > phi1) phi1 = phi;
+	}
 
-	  if (typeof value !== "function") { value = constant(value); }
+	function linePoint(lambda, phi) {
+	  var p = cartesian([lambda * radians, phi * radians]);
 
-	  for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {
-	    var parent = parents[j],
-	        group = groups[j],
-	        groupLength = group.length,
-	        data = value.call(parent, parent && parent.__data__, j, parents),
-	        dataLength = data.length,
-	        enterGroup = enter[j] = new Array(dataLength),
-	        updateGroup = update[j] = new Array(dataLength),
-	        exitGroup = exit[j] = new Array(groupLength);
+	  if (p0) {
+	    var normal = cartesianCross(p0, p),
+	        equatorial = [normal[1], -normal[0], 0],
+	        inflection = cartesianCross(equatorial, normal);
+	    cartesianNormalizeInPlace(inflection);
+	    inflection = spherical(inflection);
+	    var delta = lambda - lambda2,
+	        sign = delta > 0 ? 1 : -1,
+	        lambdai = inflection[0] * degrees$1 * sign,
+	        phii,
+	        antimeridian = abs$2(delta) > 180;
 
-	    bind(parent, group, enterGroup, updateGroup, exitGroup, data, key);
+	    if (antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
+	      phii = inflection[1] * degrees$1;
+	      if (phii > phi1) phi1 = phii;
+	    } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
+	      phii = -inflection[1] * degrees$1;
+	      if (phii < phi0) phi0 = phii;
+	    } else {
+	      if (phi < phi0) phi0 = phi;
+	      if (phi > phi1) phi1 = phi;
+	    }
 
-	    // Now connect the enter nodes to their following update node, such that
-	    // appendChild can insert the materialized enter node before this node,
-	    // rather than at the end of the parent node.
-	    for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {
-	      if (previous = enterGroup[i0]) {
-	        if (i0 >= i1) { i1 = i0 + 1; }
-	        while (!(next = updateGroup[i1]) && ++i1 < dataLength){ }
-	        previous._next = next || null;
+	    if (antimeridian) {
+	      if (lambda < lambda2) {
+	        if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
+	      } else {
+	        if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
+	      }
+	    } else {
+	      if (lambda1 >= lambda0$1) {
+	        if (lambda < lambda0$1) lambda0$1 = lambda;
+	        if (lambda > lambda1) lambda1 = lambda;
+	      } else {
+	        if (lambda > lambda2) {
+	          if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
+	        } else {
+	          if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
+	        }
 	      }
 	    }
+	  } else {
+	    ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
 	  }
 
-	  update = new Selection(update, parents);
-	  update._enter = enter;
-	  update._exit = exit;
-	  return update;
+	  if (phi < phi0) phi0 = phi;
+	  if (phi > phi1) phi1 = phi;
+	  p0 = p, lambda2 = lambda;
 	}
 
-	function selection_exit() {
-	  return new Selection(this._exit || this._groups.map(sparse), this._parents);
+	function boundsLineStart() {
+	  boundsStream$1.point = linePoint;
 	}
 
-	function selection_join(onenter, onupdate, onexit) {
-	  var enter = this.enter(), update = this, exit = this.exit();
-	  enter = typeof onenter === "function" ? onenter(enter) : enter.append(onenter + "");
-	  if (onupdate != null) { update = onupdate(update); }
-	  if (onexit == null) { exit.remove(); } else { onexit(exit); }
-	  return enter && update ? enter.merge(update).order() : update;
+	function boundsLineEnd() {
+	  range[0] = lambda0$1, range[1] = lambda1;
+	  boundsStream$1.point = boundsPoint$1;
+	  p0 = null;
 	}
 
-	function selection_merge(selection) {
-
-	  for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
-	    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
-	      if (node = group0[i] || group1[i]) {
-	        merge[i] = node;
-	      }
-	    }
-	  }
-
-	  for (; j < m0; ++j) {
-	    merges[j] = groups0[j];
+	function boundsRingPoint(lambda, phi) {
+	  if (p0) {
+	    var delta = lambda - lambda2;
+	    deltaSum.add(abs$2(delta) > 180 ? delta + (delta > 0 ? 360 : -360) : delta);
+	  } else {
+	    lambda00 = lambda, phi00 = phi;
 	  }
 
-	  return new Selection(merges, this._parents);
+	  areaStream$1.point(lambda, phi);
+	  linePoint(lambda, phi);
 	}
 
-	function selection_order() {
-
-	  for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {
-	    for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {
-	      if (node = group[i]) {
-	        if (next && node.compareDocumentPosition(next) ^ 4) { next.parentNode.insertBefore(node, next); }
-	        next = node;
-	      }
-	    }
-	  }
-
-	  return this;
+	function boundsRingStart() {
+	  areaStream$1.lineStart();
 	}
 
-	function selection_sort(compare) {
-	  if (!compare) { compare = ascending; }
-
-	  function compareNode(a, b) {
-	    return a && b ? compare(a.__data__, b.__data__) : !a - !b;
-	  }
-
-	  for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) {
-	      if (node = group[i]) {
-	        sortgroup[i] = node;
-	      }
-	    }
-	    sortgroup.sort(compareNode);
-	  }
+	function boundsRingEnd() {
+	  boundsRingPoint(lambda00, phi00);
+	  areaStream$1.lineEnd();
+	  if (abs$2(deltaSum) > epsilon$1) lambda0$1 = -(lambda1 = 180);
+	  range[0] = lambda0$1, range[1] = lambda1;
+	  p0 = null;
+	} // Finds the left-right distance between two longitudes.
+	// This is almost the same as (lambda1 - lambda0 + 360°) % 360°, except that we want
+	// the distance between ±180° to be 360°.
 
-	  return new Selection(sortgroups, this._parents).order();
-	}
 
-	function ascending(a, b) {
-	  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
+	function angle(lambda0, lambda1) {
+	  return (lambda1 -= lambda0) < 0 ? lambda1 + 360 : lambda1;
 	}
 
-	function selection_call() {
-	  var callback = arguments[0];
-	  arguments[0] = this;
-	  callback.apply(null, arguments);
-	  return this;
+	function rangeCompare(a, b) {
+	  return a[0] - b[0];
 	}
 
-	function selection_nodes() {
-	  var nodes = new Array(this.size()), i = -1;
-	  this.each(function() { nodes[++i] = this; });
-	  return nodes;
+	function rangeContains(range, x) {
+	  return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;
 	}
 
-	function selection_node() {
-
-	  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
-	    for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {
-	      var node = group[i];
-	      if (node) { return node; }
-	    }
-	  }
+	function d3_geoBounds (feature) {
+	  var i, n, a, b, merged, deltaMax, delta;
+	  phi1 = lambda1 = -(lambda0$1 = phi0 = Infinity);
+	  ranges = [];
+	  d3_geoStream(feature, boundsStream$1); // First, sort ranges by their minimum longitudes.
 
-	  return null;
-	}
+	  if (n = ranges.length) {
+	    ranges.sort(rangeCompare); // Then, merge any ranges that overlap.
 
-	function selection_size() {
-	  var size = 0;
-	  this.each(function() { ++size; });
-	  return size;
-	}
+	    for (i = 1, a = ranges[0], merged = [a]; i < n; ++i) {
+	      b = ranges[i];
 
-	function selection_empty() {
-	  return !this.node();
-	}
+	      if (rangeContains(a, b[0]) || rangeContains(a, b[1])) {
+	        if (angle(a[0], b[1]) > angle(a[0], a[1])) a[1] = b[1];
+	        if (angle(b[0], a[1]) > angle(a[0], a[1])) a[0] = b[0];
+	      } else {
+	        merged.push(a = b);
+	      }
+	    } // Finally, find the largest gap between the merged ranges.
+	    // The final bounding box will be the inverse of this gap.
 
-	function selection_each(callback) {
 
-	  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
-	    for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {
-	      if (node = group[i]) { callback.call(node, node.__data__, i, group); }
+	    for (deltaMax = -Infinity, n = merged.length - 1, i = 0, a = merged[n]; i <= n; a = b, ++i) {
+	      b = merged[i];
+	      if ((delta = angle(a[1], b[0])) > deltaMax) deltaMax = delta, lambda0$1 = b[0], lambda1 = a[1];
 	    }
 	  }
 
-	  return this;
+	  ranges = range = null;
+	  return lambda0$1 === Infinity || phi0 === Infinity ? [[NaN, NaN], [NaN, NaN]] : [[lambda0$1, phi0], [lambda1, phi1]];
 	}
 
-	function attrRemove(name) {
-	  return function() {
-	    this.removeAttribute(name);
-	  };
-	}
+	function compose (a, b) {
+	  function compose(x, y) {
+	    return x = a(x, y), b(x[0], x[1]);
+	  }
 
-	function attrRemoveNS(fullname) {
-	  return function() {
-	    this.removeAttributeNS(fullname.space, fullname.local);
+	  if (a.invert && b.invert) compose.invert = function (x, y) {
+	    return x = b.invert(x, y), x && a.invert(x[0], x[1]);
 	  };
+	  return compose;
 	}
 
-	function attrConstant(name, value) {
-	  return function() {
-	    this.setAttribute(name, value);
-	  };
+	function rotationIdentity(lambda, phi) {
+	  return [abs$2(lambda) > pi ? lambda + Math.round(-lambda / tau) * tau : lambda, phi];
 	}
 
-	function attrConstantNS(fullname, value) {
-	  return function() {
-	    this.setAttributeNS(fullname.space, fullname.local, value);
-	  };
+	rotationIdentity.invert = rotationIdentity;
+	function rotateRadians(deltaLambda, deltaPhi, deltaGamma) {
+	  return (deltaLambda %= tau) ? deltaPhi || deltaGamma ? compose(rotationLambda(deltaLambda), rotationPhiGamma(deltaPhi, deltaGamma)) : rotationLambda(deltaLambda) : deltaPhi || deltaGamma ? rotationPhiGamma(deltaPhi, deltaGamma) : rotationIdentity;
 	}
 
-	function attrFunction(name, value) {
-	  return function() {
-	    var v = value.apply(this, arguments);
-	    if (v == null) { this.removeAttribute(name); }
-	    else { this.setAttribute(name, v); }
+	function forwardRotationLambda(deltaLambda) {
+	  return function (lambda, phi) {
+	    return lambda += deltaLambda, [lambda > pi ? lambda - tau : lambda < -pi ? lambda + tau : lambda, phi];
 	  };
 	}
 
-	function attrFunctionNS(fullname, value) {
-	  return function() {
-	    var v = value.apply(this, arguments);
-	    if (v == null) { this.removeAttributeNS(fullname.space, fullname.local); }
-	    else { this.setAttributeNS(fullname.space, fullname.local, v); }
-	  };
+	function rotationLambda(deltaLambda) {
+	  var rotation = forwardRotationLambda(deltaLambda);
+	  rotation.invert = forwardRotationLambda(-deltaLambda);
+	  return rotation;
 	}
 
-	function selection_attr(name, value) {
-	  var fullname = namespace(name);
+	function rotationPhiGamma(deltaPhi, deltaGamma) {
+	  var cosDeltaPhi = cos(deltaPhi),
+	      sinDeltaPhi = sin(deltaPhi),
+	      cosDeltaGamma = cos(deltaGamma),
+	      sinDeltaGamma = sin(deltaGamma);
 
-	  if (arguments.length < 2) {
-	    var node = this.node();
-	    return fullname.local
-	        ? node.getAttributeNS(fullname.space, fullname.local)
-	        : node.getAttribute(fullname);
+	  function rotation(lambda, phi) {
+	    var cosPhi = cos(phi),
+	        x = cos(lambda) * cosPhi,
+	        y = sin(lambda) * cosPhi,
+	        z = sin(phi),
+	        k = z * cosDeltaPhi + x * sinDeltaPhi;
+	    return [atan2(y * cosDeltaGamma - k * sinDeltaGamma, x * cosDeltaPhi - z * sinDeltaPhi), asin(k * cosDeltaGamma + y * sinDeltaGamma)];
 	  }
 
-	  return this.each((value == null
-	      ? (fullname.local ? attrRemoveNS : attrRemove) : (typeof value === "function"
-	      ? (fullname.local ? attrFunctionNS : attrFunction)
-	      : (fullname.local ? attrConstantNS : attrConstant)))(fullname, value));
-	}
+	  rotation.invert = function (lambda, phi) {
+	    var cosPhi = cos(phi),
+	        x = cos(lambda) * cosPhi,
+	        y = sin(lambda) * cosPhi,
+	        z = sin(phi),
+	        k = z * cosDeltaGamma - y * sinDeltaGamma;
+	    return [atan2(y * cosDeltaGamma + z * sinDeltaGamma, x * cosDeltaPhi + k * sinDeltaPhi), asin(k * cosDeltaPhi - x * sinDeltaPhi)];
+	  };
 
-	function defaultView(node) {
-	  return (node.ownerDocument && node.ownerDocument.defaultView) // node is a Node
-	      || (node.document && node) // node is a Window
-	      || node.defaultView; // node is a Document
+	  return rotation;
 	}
 
-	function styleRemove(name) {
-	  return function() {
-	    this.style.removeProperty(name);
-	  };
-	}
+	function rotation (rotate) {
+	  rotate = rotateRadians(rotate[0] * radians, rotate[1] * radians, rotate.length > 2 ? rotate[2] * radians : 0);
 
-	function styleConstant(name, value, priority) {
-	  return function() {
-	    this.style.setProperty(name, value, priority);
-	  };
-	}
+	  function forward(coordinates) {
+	    coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians);
+	    return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;
+	  }
 
-	function styleFunction(name, value, priority) {
-	  return function() {
-	    var v = value.apply(this, arguments);
-	    if (v == null) { this.style.removeProperty(name); }
-	    else { this.style.setProperty(name, v, priority); }
+	  forward.invert = function (coordinates) {
+	    coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians);
+	    return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;
 	  };
-	}
 
-	function selection_style(name, value, priority) {
-	  return arguments.length > 1
-	      ? this.each((value == null
-	            ? styleRemove : typeof value === "function"
-	            ? styleFunction
-	            : styleConstant)(name, value, priority == null ? "" : priority))
-	      : styleValue(this.node(), name);
+	  return forward;
 	}
 
-	function styleValue(node, name) {
-	  return node.style.getPropertyValue(name)
-	      || defaultView(node).getComputedStyle(node, null).getPropertyValue(name);
-	}
+	function circleStream(stream, radius, delta, direction, t0, t1) {
+	  if (!delta) return;
+	  var cosRadius = cos(radius),
+	      sinRadius = sin(radius),
+	      step = direction * delta;
 
-	function propertyRemove(name) {
-	  return function() {
-	    delete this[name];
-	  };
-	}
+	  if (t0 == null) {
+	    t0 = radius + direction * tau;
+	    t1 = radius - step / 2;
+	  } else {
+	    t0 = circleRadius(cosRadius, t0);
+	    t1 = circleRadius(cosRadius, t1);
+	    if (direction > 0 ? t0 < t1 : t0 > t1) t0 += direction * tau;
+	  }
 
-	function propertyConstant(name, value) {
-	  return function() {
-	    this[name] = value;
-	  };
+	  for (var point, t = t0; direction > 0 ? t > t1 : t < t1; t -= step) {
+	    point = spherical([cosRadius, -sinRadius * cos(t), -sinRadius * sin(t)]);
+	    stream.point(point[0], point[1]);
+	  }
+	} // Returns the signed angle of a cartesian point relative to [cosRadius, 0, 0].
+
+	function circleRadius(cosRadius, point) {
+	  point = cartesian(point), point[0] -= cosRadius;
+	  cartesianNormalizeInPlace(point);
+	  var radius = acos(-point[1]);
+	  return ((-point[2] < 0 ? -radius : radius) + tau - epsilon$1) % tau;
 	}
 
-	function propertyFunction(name, value) {
-	  return function() {
-	    var v = value.apply(this, arguments);
-	    if (v == null) { delete this[name]; }
-	    else { this[name] = v; }
+	function clipBuffer () {
+	  var lines = [],
+	      line;
+	  return {
+	    point: function point(x, y, m) {
+	      line.push([x, y, m]);
+	    },
+	    lineStart: function lineStart() {
+	      lines.push(line = []);
+	    },
+	    lineEnd: noop$1,
+	    rejoin: function rejoin() {
+	      if (lines.length > 1) lines.push(lines.pop().concat(lines.shift()));
+	    },
+	    result: function result() {
+	      var result = lines;
+	      lines = [];
+	      line = null;
+	      return result;
+	    }
 	  };
 	}
 
-	function selection_property(name, value) {
-	  return arguments.length > 1
-	      ? this.each((value == null
-	          ? propertyRemove : typeof value === "function"
-	          ? propertyFunction
-	          : propertyConstant)(name, value))
-	      : this.node()[name];
+	function pointEqual (a, b) {
+	  return abs$2(a[0] - b[0]) < epsilon$1 && abs$2(a[1] - b[1]) < epsilon$1;
 	}
 
-	function classArray(string) {
-	  return string.trim().split(/^|\s+/);
-	}
+	function Intersection(point, points, other, entry) {
+	  this.x = point;
+	  this.z = points;
+	  this.o = other; // another intersection
 
-	function classList(node) {
-	  return node.classList || new ClassList(node);
-	}
+	  this.e = entry; // is an entry?
 
-	function ClassList(node) {
-	  this._node = node;
-	  this._names = classArray(node.getAttribute("class") || "");
-	}
+	  this.v = false; // visited
 
-	ClassList.prototype = {
-	  add: function(name) {
-	    var i = this._names.indexOf(name);
-	    if (i < 0) {
-	      this._names.push(name);
-	      this._node.setAttribute("class", this._names.join(" "));
-	    }
-	  },
-	  remove: function(name) {
-	    var i = this._names.indexOf(name);
-	    if (i >= 0) {
-	      this._names.splice(i, 1);
-	      this._node.setAttribute("class", this._names.join(" "));
-	    }
-	  },
-	  contains: function(name) {
-	    return this._names.indexOf(name) >= 0;
-	  }
-	};
+	  this.n = this.p = null; // next & previous
+	} // A generalized polygon clipping algorithm: given a polygon that has been cut
+	// into its visible line segments, and rejoins the segments by interpolating
+	// along the clip edge.
 
-	function classedAdd(node, names) {
-	  var list = classList(node), i = -1, n = names.length;
-	  while (++i < n) { list.add(names[i]); }
-	}
 
-	function classedRemove(node, names) {
-	  var list = classList(node), i = -1, n = names.length;
-	  while (++i < n) { list.remove(names[i]); }
-	}
+	function clipRejoin (segments, compareIntersection, startInside, interpolate, stream) {
+	  var subject = [],
+	      clip = [],
+	      i,
+	      n;
+	  segments.forEach(function (segment) {
+	    if ((n = segment.length - 1) <= 0) return;
+	    var n,
+	        p0 = segment[0],
+	        p1 = segment[n],
+	        x;
 
-	function classedTrue(names) {
-	  return function() {
-	    classedAdd(this, names);
-	  };
-	}
+	    if (pointEqual(p0, p1)) {
+	      if (!p0[2] && !p1[2]) {
+	        stream.lineStart();
 
-	function classedFalse(names) {
-	  return function() {
-	    classedRemove(this, names);
-	  };
-	}
+	        for (i = 0; i < n; ++i) {
+	          stream.point((p0 = segment[i])[0], p0[1]);
+	        }
 
-	function classedFunction(names, value) {
-	  return function() {
-	    (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);
-	  };
-	}
+	        stream.lineEnd();
+	        return;
+	      } // handle degenerate cases by moving the point
 
-	function selection_classed(name, value) {
-	  var names = classArray(name + "");
 
-	  if (arguments.length < 2) {
-	    var list = classList(this.node()), i = -1, n = names.length;
-	    while (++i < n) { if (!list.contains(names[i])) { return false; } }
-	    return true;
+	      p1[0] += 2 * epsilon$1;
+	    }
+
+	    subject.push(x = new Intersection(p0, segment, null, true));
+	    clip.push(x.o = new Intersection(p0, null, x, false));
+	    subject.push(x = new Intersection(p1, segment, null, false));
+	    clip.push(x.o = new Intersection(p1, null, x, true));
+	  });
+	  if (!subject.length) return;
+	  clip.sort(compareIntersection);
+	  link(subject);
+	  link(clip);
+
+	  for (i = 0, n = clip.length; i < n; ++i) {
+	    clip[i].e = startInside = !startInside;
 	  }
 
-	  return this.each((typeof value === "function"
-	      ? classedFunction : value
-	      ? classedTrue
-	      : classedFalse)(names, value));
-	}
+	  var start = subject[0],
+	      points,
+	      point;
 
-	function textRemove() {
-	  this.textContent = "";
-	}
+	  while (1) {
+	    // Find first unvisited intersection.
+	    var current = start,
+	        isSubject = true;
 
-	function textConstant(value) {
-	  return function() {
-	    this.textContent = value;
-	  };
-	}
+	    while (current.v) {
+	      if ((current = current.n) === start) return;
+	    }
 
-	function textFunction(value) {
-	  return function() {
-	    var v = value.apply(this, arguments);
-	    this.textContent = v == null ? "" : v;
-	  };
-	}
+	    points = current.z;
+	    stream.lineStart();
 
-	function selection_text(value) {
-	  return arguments.length
-	      ? this.each(value == null
-	          ? textRemove : (typeof value === "function"
-	          ? textFunction
-	          : textConstant)(value))
-	      : this.node().textContent;
-	}
+	    do {
+	      current.v = current.o.v = true;
 
-	function htmlRemove() {
-	  this.innerHTML = "";
-	}
+	      if (current.e) {
+	        if (isSubject) {
+	          for (i = 0, n = points.length; i < n; ++i) {
+	            stream.point((point = points[i])[0], point[1]);
+	          }
+	        } else {
+	          interpolate(current.x, current.n.x, 1, stream);
+	        }
 
-	function htmlConstant(value) {
-	  return function() {
-	    this.innerHTML = value;
-	  };
-	}
+	        current = current.n;
+	      } else {
+	        if (isSubject) {
+	          points = current.p.z;
 
-	function htmlFunction(value) {
-	  return function() {
-	    var v = value.apply(this, arguments);
-	    this.innerHTML = v == null ? "" : v;
-	  };
-	}
+	          for (i = points.length - 1; i >= 0; --i) {
+	            stream.point((point = points[i])[0], point[1]);
+	          }
+	        } else {
+	          interpolate(current.x, current.p.x, -1, stream);
+	        }
 
-	function selection_html(value) {
-	  return arguments.length
-	      ? this.each(value == null
-	          ? htmlRemove : (typeof value === "function"
-	          ? htmlFunction
-	          : htmlConstant)(value))
-	      : this.node().innerHTML;
-	}
+	        current = current.p;
+	      }
 
-	function raise() {
-	  if (this.nextSibling) { this.parentNode.appendChild(this); }
-	}
+	      current = current.o;
+	      points = current.z;
+	      isSubject = !isSubject;
+	    } while (!current.v);
 
-	function selection_raise() {
-	  return this.each(raise);
+	    stream.lineEnd();
+	  }
 	}
 
-	function lower() {
-	  if (this.previousSibling) { this.parentNode.insertBefore(this, this.parentNode.firstChild); }
-	}
+	function link(array) {
+	  if (!(n = array.length)) return;
+	  var n,
+	      i = 0,
+	      a = array[0],
+	      b;
 
-	function selection_lower() {
-	  return this.each(lower);
-	}
+	  while (++i < n) {
+	    a.n = b = array[i];
+	    b.p = a;
+	    a = b;
+	  }
 
-	function selection_append(name) {
-	  var create = typeof name === "function" ? name : creator(name);
-	  return this.select(function() {
-	    return this.appendChild(create.apply(this, arguments));
-	  });
+	  a.n = b = array[0];
+	  b.p = a;
 	}
 
-	function constantNull() {
-	  return null;
+	function longitude(point) {
+	  if (abs$2(point[0]) <= pi) return point[0];else return sign(point[0]) * ((abs$2(point[0]) + pi) % tau - pi);
 	}
 
-	function selection_insert(name, before) {
-	  var create = typeof name === "function" ? name : creator(name),
-	      select = before == null ? constantNull : typeof before === "function" ? before : selector(before);
-	  return this.select(function() {
-	    return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);
-	  });
-	}
+	function polygonContains (polygon, point) {
+	  var lambda = longitude(point),
+	      phi = point[1],
+	      sinPhi = sin(phi),
+	      normal = [sin(lambda), -cos(lambda), 0],
+	      angle = 0,
+	      winding = 0;
+	  var sum = new Adder();
+	  if (sinPhi === 1) phi = halfPi + epsilon$1;else if (sinPhi === -1) phi = -halfPi - epsilon$1;
 
-	function remove() {
-	  var parent = this.parentNode;
-	  if (parent) { parent.removeChild(this); }
-	}
+	  for (var i = 0, n = polygon.length; i < n; ++i) {
+	    if (!(m = (ring = polygon[i]).length)) continue;
+	    var ring,
+	        m,
+	        point0 = ring[m - 1],
+	        lambda0 = longitude(point0),
+	        phi0 = point0[1] / 2 + quarterPi,
+	        sinPhi0 = sin(phi0),
+	        cosPhi0 = cos(phi0);
 
-	function selection_remove() {
-	  return this.each(remove);
-	}
+	    for (var j = 0; j < m; ++j, lambda0 = lambda1, sinPhi0 = sinPhi1, cosPhi0 = cosPhi1, point0 = point1) {
+	      var point1 = ring[j],
+	          lambda1 = longitude(point1),
+	          phi1 = point1[1] / 2 + quarterPi,
+	          sinPhi1 = sin(phi1),
+	          cosPhi1 = cos(phi1),
+	          delta = lambda1 - lambda0,
+	          sign = delta >= 0 ? 1 : -1,
+	          absDelta = sign * delta,
+	          antimeridian = absDelta > pi,
+	          k = sinPhi0 * sinPhi1;
+	      sum.add(atan2(k * sign * sin(absDelta), cosPhi0 * cosPhi1 + k * cos(absDelta)));
+	      angle += antimeridian ? delta + sign * tau : delta; // Are the longitudes either side of the point’s meridian (lambda),
+	      // and are the latitudes smaller than the parallel (phi)?
 
-	function selection_cloneShallow() {
-	  var clone = this.cloneNode(false), parent = this.parentNode;
-	  return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
-	}
+	      if (antimeridian ^ lambda0 >= lambda ^ lambda1 >= lambda) {
+	        var arc = cartesianCross(cartesian(point0), cartesian(point1));
+	        cartesianNormalizeInPlace(arc);
+	        var intersection = cartesianCross(normal, arc);
+	        cartesianNormalizeInPlace(intersection);
+	        var phiArc = (antimeridian ^ delta >= 0 ? -1 : 1) * asin(intersection[2]);
 
-	function selection_cloneDeep() {
-	  var clone = this.cloneNode(true), parent = this.parentNode;
-	  return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
-	}
+	        if (phi > phiArc || phi === phiArc && (arc[0] || arc[1])) {
+	          winding += antimeridian ^ delta >= 0 ? 1 : -1;
+	        }
+	      }
+	    }
+	  } // First, determine whether the South pole is inside or outside:
+	  //
+	  // It is inside if:
+	  // * the polygon winds around it in a clockwise direction.
+	  // * the polygon does not (cumulatively) wind around it, but has a negative
+	  //   (counter-clockwise) area.
+	  //
+	  // Second, count the (signed) number of times a segment crosses a lambda
+	  // from the point to the South pole.  If it is zero, then the point is the
+	  // same side as the South pole.
 
-	function selection_clone(deep) {
-	  return this.select(deep ? selection_cloneDeep : selection_cloneShallow);
-	}
 
-	function selection_datum(value) {
-	  return arguments.length
-	      ? this.property("__data__", value)
-	      : this.node().__data__;
+	  return (angle < -epsilon$1 || angle < epsilon$1 && sum < -epsilon2$1) ^ winding & 1;
 	}
 
-	var filterEvents = {};
+	function clip (pointVisible, clipLine, interpolate, start) {
+	  return function (sink) {
+	    var line = clipLine(sink),
+	        ringBuffer = clipBuffer(),
+	        ringSink = clipLine(ringBuffer),
+	        polygonStarted = false,
+	        polygon,
+	        segments,
+	        ring;
+	    var clip = {
+	      point: point,
+	      lineStart: lineStart,
+	      lineEnd: lineEnd,
+	      polygonStart: function polygonStart() {
+	        clip.point = pointRing;
+	        clip.lineStart = ringStart;
+	        clip.lineEnd = ringEnd;
+	        segments = [];
+	        polygon = [];
+	      },
+	      polygonEnd: function polygonEnd() {
+	        clip.point = point;
+	        clip.lineStart = lineStart;
+	        clip.lineEnd = lineEnd;
+	        segments = merge$4(segments);
+	        var startInside = polygonContains(polygon, start);
 
-	var event = null;
+	        if (segments.length) {
+	          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
+	          clipRejoin(segments, compareIntersection, startInside, interpolate, sink);
+	        } else if (startInside) {
+	          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
+	          sink.lineStart();
+	          interpolate(null, null, 1, sink);
+	          sink.lineEnd();
+	        }
 
-	if (typeof document !== "undefined") {
-	  var element = document.documentElement;
-	  if (!("onmouseenter" in element)) {
-	    filterEvents = {mouseenter: "mouseover", mouseleave: "mouseout"};
-	  }
-	}
+	        if (polygonStarted) sink.polygonEnd(), polygonStarted = false;
+	        segments = polygon = null;
+	      },
+	      sphere: function sphere() {
+	        sink.polygonStart();
+	        sink.lineStart();
+	        interpolate(null, null, 1, sink);
+	        sink.lineEnd();
+	        sink.polygonEnd();
+	      }
+	    };
 
-	function filterContextListener(listener, index, group) {
-	  listener = contextListener(listener, index, group);
-	  return function(event) {
-	    var related = event.relatedTarget;
-	    if (!related || (related !== this && !(related.compareDocumentPosition(this) & 8))) {
-	      listener.call(this, event);
+	    function point(lambda, phi) {
+	      if (pointVisible(lambda, phi)) sink.point(lambda, phi);
 	    }
-	  };
-	}
 
-	function contextListener(listener, index, group) {
-	  return function(event1) {
-	    var event0 = event; // Events can be reentrant (e.g., focus).
-	    event = event1;
-	    try {
-	      listener.call(this, this.__data__, index, group);
-	    } finally {
-	      event = event0;
+	    function pointLine(lambda, phi) {
+	      line.point(lambda, phi);
 	    }
-	  };
-	}
-
-	function parseTypenames$1(typenames) {
-	  return typenames.trim().split(/^|\s+/).map(function(t) {
-	    var name = "", i = t.indexOf(".");
-	    if (i >= 0) { name = t.slice(i + 1), t = t.slice(0, i); }
-	    return {type: t, name: name};
-	  });
-	}
 
-	function onRemove(typename) {
-	  return function() {
-	    var on = this.__on;
-	    if (!on) { return; }
-	    for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {
-	      if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {
-	        this.removeEventListener(o.type, o.listener, o.capture);
-	      } else {
-	        on[++i] = o;
-	      }
+	    function lineStart() {
+	      clip.point = pointLine;
+	      line.lineStart();
 	    }
-	    if (++i) { on.length = i; }
-	    else { delete this.__on; }
-	  };
-	}
-
-	function onAdd(typename, value, capture) {
-	  var wrap = filterEvents.hasOwnProperty(typename.type) ? filterContextListener : contextListener;
-	  return function(d, i, group) {
-	    var on = this.__on, o, listener = wrap(value, i, group);
-	    if (on) { for (var j = 0, m = on.length; j < m; ++j) {
-	      if ((o = on[j]).type === typename.type && o.name === typename.name) {
-	        this.removeEventListener(o.type, o.listener, o.capture);
-	        this.addEventListener(o.type, o.listener = listener, o.capture = capture);
-	        o.value = value;
-	        return;
-	      }
-	    } }
-	    this.addEventListener(typename.type, listener, capture);
-	    o = {type: typename.type, name: typename.name, value: value, listener: listener, capture: capture};
-	    if (!on) { this.__on = [o]; }
-	    else { on.push(o); }
-	  };
-	}
-
-	function selection_on(typename, value, capture) {
-	  var typenames = parseTypenames$1(typename + ""), i, n = typenames.length, t;
 
-	  if (arguments.length < 2) {
-	    var on = this.node().__on;
-	    if (on) { for (var j = 0, m = on.length, o; j < m; ++j) {
-	      for (i = 0, o = on[j]; i < n; ++i) {
-	        if ((t = typenames[i]).type === o.type && t.name === o.name) {
-	          return o.value;
-	        }
-	      }
-	    } }
-	    return;
-	  }
+	    function lineEnd() {
+	      clip.point = point;
+	      line.lineEnd();
+	    }
 
-	  on = value ? onAdd : onRemove;
-	  if (capture == null) { capture = false; }
-	  for (i = 0; i < n; ++i) { this.each(on(typenames[i], value, capture)); }
-	  return this;
-	}
+	    function pointRing(lambda, phi) {
+	      ring.push([lambda, phi]);
+	      ringSink.point(lambda, phi);
+	    }
 
-	function customEvent(event1, listener, that, args) {
-	  var event0 = event;
-	  event1.sourceEvent = event;
-	  event = event1;
-	  try {
-	    return listener.apply(that, args);
-	  } finally {
-	    event = event0;
-	  }
-	}
+	    function ringStart() {
+	      ringSink.lineStart();
+	      ring = [];
+	    }
 
-	function dispatchEvent(node, type, params) {
-	  var window = defaultView(node),
-	      event = window.CustomEvent;
+	    function ringEnd() {
+	      pointRing(ring[0][0], ring[0][1]);
+	      ringSink.lineEnd();
+	      var clean = ringSink.clean(),
+	          ringSegments = ringBuffer.result(),
+	          i,
+	          n = ringSegments.length,
+	          m,
+	          segment,
+	          point;
+	      ring.pop();
+	      polygon.push(ring);
+	      ring = null;
+	      if (!n) return; // No intersections.
 
-	  if (typeof event === "function") {
-	    event = new event(type, params);
-	  } else {
-	    event = window.document.createEvent("Event");
-	    if (params) { event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail; }
-	    else { event.initEvent(type, false, false); }
-	  }
+	      if (clean & 1) {
+	        segment = ringSegments[0];
 
-	  node.dispatchEvent(event);
-	}
+	        if ((m = segment.length - 1) > 0) {
+	          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
+	          sink.lineStart();
 
-	function dispatchConstant(type, params) {
-	  return function() {
-	    return dispatchEvent(this, type, params);
-	  };
-	}
+	          for (i = 0; i < m; ++i) {
+	            sink.point((point = segment[i])[0], point[1]);
+	          }
 
-	function dispatchFunction(type, params) {
-	  return function() {
-	    return dispatchEvent(this, type, params.apply(this, arguments));
-	  };
-	}
+	          sink.lineEnd();
+	        }
 
-	function selection_dispatch(type, params) {
-	  return this.each((typeof params === "function"
-	      ? dispatchFunction
-	      : dispatchConstant)(type, params));
-	}
+	        return;
+	      } // Rejoin connected segments.
+	      // TODO reuse ringBuffer.rejoin()?
 
-	var root$1 = [null];
 
-	function Selection(groups, parents) {
-	  this._groups = groups;
-	  this._parents = parents;
-	}
+	      if (n > 1 && clean & 2) ringSegments.push(ringSegments.pop().concat(ringSegments.shift()));
+	      segments.push(ringSegments.filter(validSegment));
+	    }
 
-	function selection() {
-	  return new Selection([[document.documentElement]], root$1);
+	    return clip;
+	  };
 	}
 
-	Selection.prototype = selection.prototype = {
-	  constructor: Selection,
-	  select: selection_select,
-	  selectAll: selection_selectAll,
-	  filter: selection_filter,
-	  data: selection_data,
-	  enter: selection_enter,
-	  exit: selection_exit,
-	  join: selection_join,
-	  merge: selection_merge,
-	  order: selection_order,
-	  sort: selection_sort,
-	  call: selection_call,
-	  nodes: selection_nodes,
-	  node: selection_node,
-	  size: selection_size,
-	  empty: selection_empty,
-	  each: selection_each,
-	  attr: selection_attr,
-	  style: selection_style,
-	  property: selection_property,
-	  classed: selection_classed,
-	  text: selection_text,
-	  html: selection_html,
-	  raise: selection_raise,
-	  lower: selection_lower,
-	  append: selection_append,
-	  insert: selection_insert,
-	  remove: selection_remove,
-	  clone: selection_clone,
-	  datum: selection_datum,
-	  on: selection_on,
-	  dispatch: selection_dispatch
-	};
+	function validSegment(segment) {
+	  return segment.length > 1;
+	} // Intersections are sorted along the clip edge. For both antimeridian cutting
+	// and circle clipping, the same comparison is used.
 
-	function select(selector) {
-	  return typeof selector === "string"
-	      ? new Selection([[document.querySelector(selector)]], [document.documentElement])
-	      : new Selection([[selector]], root$1);
-	}
 
-	function sourceEvent() {
-	  var current = event, source;
-	  while (source = current.sourceEvent) { current = source; }
-	  return current;
+	function compareIntersection(a, b) {
+	  return ((a = a.x)[0] < 0 ? a[1] - halfPi - epsilon$1 : halfPi - a[1]) - ((b = b.x)[0] < 0 ? b[1] - halfPi - epsilon$1 : halfPi - b[1]);
 	}
 
-	function point(node, event) {
-	  var svg = node.ownerSVGElement || node;
+	var clipAntimeridian = clip(function () {
+	  return true;
+	}, clipAntimeridianLine, clipAntimeridianInterpolate, [-pi, -halfPi]); // Takes a line and cuts into visible segments. Return values: 0 - there were
+	// intersections or the line was empty; 1 - no intersections; 2 - there were
+	// intersections, and the first and last segments should be rejoined.
 
-	  if (svg.createSVGPoint) {
-	    var point = svg.createSVGPoint();
-	    point.x = event.clientX, point.y = event.clientY;
-	    point = point.matrixTransform(node.getScreenCTM().inverse());
-	    return [point.x, point.y];
-	  }
+	function clipAntimeridianLine(stream) {
+	  var lambda0 = NaN,
+	      phi0 = NaN,
+	      sign0 = NaN,
+	      _clean; // no intersections
 
-	  var rect = node.getBoundingClientRect();
-	  return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];
-	}
 
-	function mouse(node) {
-	  var event = sourceEvent();
-	  if (event.changedTouches) { event = event.changedTouches[0]; }
-	  return point(node, event);
-	}
+	  return {
+	    lineStart: function lineStart() {
+	      stream.lineStart();
+	      _clean = 1;
+	    },
+	    point: function point(lambda1, phi1) {
+	      var sign1 = lambda1 > 0 ? pi : -pi,
+	          delta = abs$2(lambda1 - lambda0);
 
-	function selectAll(selector) {
-	  return typeof selector === "string"
-	      ? new Selection([document.querySelectorAll(selector)], [document.documentElement])
-	      : new Selection([selector == null ? [] : selector], root$1);
-	}
+	      if (abs$2(delta - pi) < epsilon$1) {
+	        // line crosses a pole
+	        stream.point(lambda0, phi0 = (phi0 + phi1) / 2 > 0 ? halfPi : -halfPi);
+	        stream.point(sign0, phi0);
+	        stream.lineEnd();
+	        stream.lineStart();
+	        stream.point(sign1, phi0);
+	        stream.point(lambda1, phi0);
+	        _clean = 0;
+	      } else if (sign0 !== sign1 && delta >= pi) {
+	        // line crosses antimeridian
+	        if (abs$2(lambda0 - sign0) < epsilon$1) lambda0 -= sign0 * epsilon$1; // handle degeneracies
 
-	function touch(node, touches, identifier) {
-	  if (arguments.length < 3) { identifier = touches, touches = sourceEvent().changedTouches; }
+	        if (abs$2(lambda1 - sign1) < epsilon$1) lambda1 -= sign1 * epsilon$1;
+	        phi0 = clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1);
+	        stream.point(sign0, phi0);
+	        stream.lineEnd();
+	        stream.lineStart();
+	        stream.point(sign1, phi0);
+	        _clean = 0;
+	      }
 
-	  for (var i = 0, n = touches ? touches.length : 0, touch; i < n; ++i) {
-	    if ((touch = touches[i]).identifier === identifier) {
-	      return point(node, touch);
+	      stream.point(lambda0 = lambda1, phi0 = phi1);
+	      sign0 = sign1;
+	    },
+	    lineEnd: function lineEnd() {
+	      stream.lineEnd();
+	      lambda0 = phi0 = NaN;
+	    },
+	    clean: function clean() {
+	      return 2 - _clean; // if intersections, rejoin first and last segments
 	    }
-	  }
-
-	  return null;
-	}
-
-	function nopropagation() {
-	  event.stopImmediatePropagation();
+	  };
 	}
 
-	function noevent() {
-	  event.preventDefault();
-	  event.stopImmediatePropagation();
+	function clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1) {
+	  var cosPhi0,
+	      cosPhi1,
+	      sinLambda0Lambda1 = sin(lambda0 - lambda1);
+	  return abs$2(sinLambda0Lambda1) > epsilon$1 ? atan((sin(phi0) * (cosPhi1 = cos(phi1)) * sin(lambda1) - sin(phi1) * (cosPhi0 = cos(phi0)) * sin(lambda0)) / (cosPhi0 * cosPhi1 * sinLambda0Lambda1)) : (phi0 + phi1) / 2;
 	}
 
-	function dragDisable(view) {
-	  var root = view.document.documentElement,
-	      selection = select(view).on("dragstart.drag", noevent, true);
-	  if ("onselectstart" in root) {
-	    selection.on("selectstart.drag", noevent, true);
-	  } else {
-	    root.__noselect = root.style.MozUserSelect;
-	    root.style.MozUserSelect = "none";
-	  }
-	}
+	function clipAntimeridianInterpolate(from, to, direction, stream) {
+	  var phi;
 
-	function yesdrag(view, noclick) {
-	  var root = view.document.documentElement,
-	      selection = select(view).on("dragstart.drag", null);
-	  if (noclick) {
-	    selection.on("click.drag", noevent, true);
-	    setTimeout(function() { selection.on("click.drag", null); }, 0);
-	  }
-	  if ("onselectstart" in root) {
-	    selection.on("selectstart.drag", null);
+	  if (from == null) {
+	    phi = direction * halfPi;
+	    stream.point(-pi, phi);
+	    stream.point(0, phi);
+	    stream.point(pi, phi);
+	    stream.point(pi, 0);
+	    stream.point(pi, -phi);
+	    stream.point(0, -phi);
+	    stream.point(-pi, -phi);
+	    stream.point(-pi, 0);
+	    stream.point(-pi, phi);
+	  } else if (abs$2(from[0] - to[0]) > epsilon$1) {
+	    var lambda = from[0] < to[0] ? pi : -pi;
+	    phi = direction * lambda / 2;
+	    stream.point(-lambda, phi);
+	    stream.point(0, phi);
+	    stream.point(lambda, phi);
 	  } else {
-	    root.style.MozUserSelect = root.__noselect;
-	    delete root.__noselect;
+	    stream.point(to[0], to[1]);
 	  }
 	}
 
-	function constant$1(x) {
-	  return function() {
-	    return x;
-	  };
-	}
+	function clipCircle (radius) {
+	  var cr = cos(radius),
+	      delta = 6 * radians,
+	      smallRadius = cr > 0,
+	      notHemisphere = abs$2(cr) > epsilon$1; // TODO optimise for this common case
 
-	function DragEvent(target, type, subject, id, active, x, y, dx, dy, dispatch) {
-	  this.target = target;
-	  this.type = type;
-	  this.subject = subject;
-	  this.identifier = id;
-	  this.active = active;
-	  this.x = x;
-	  this.y = y;
-	  this.dx = dx;
-	  this.dy = dy;
-	  this._ = dispatch;
-	}
+	  function interpolate(from, to, direction, stream) {
+	    circleStream(stream, radius, delta, direction, from, to);
+	  }
 
-	DragEvent.prototype.on = function() {
-	  var value = this._.on.apply(this._, arguments);
-	  return value === this._ ? this : value;
-	};
+	  function visible(lambda, phi) {
+	    return cos(lambda) * cos(phi) > cr;
+	  } // Takes a line and cuts into visible segments. Return values used for polygon
+	  // clipping: 0 - there were intersections or the line was empty; 1 - no
+	  // intersections 2 - there were intersections, and the first and last segments
+	  // should be rejoined.
 
-	// Ignore right-click, since that should open the context menu.
-	function defaultFilter() {
-	  return !event.ctrlKey && !event.button;
-	}
 
-	function defaultContainer() {
-	  return this.parentNode;
-	}
+	  function clipLine(stream) {
+	    var point0, // previous point
+	    c0, // code for previous point
+	    v0, // visibility of previous point
+	    v00, // visibility of first point
+	    _clean; // no intersections
 
-	function defaultSubject(d) {
-	  return d == null ? {x: event.x, y: event.y} : d;
-	}
 
-	function defaultTouchable() {
-	  return navigator.maxTouchPoints || ("ontouchstart" in this);
+	    return {
+	      lineStart: function lineStart() {
+	        v00 = v0 = false;
+	        _clean = 1;
+	      },
+	      point: function point(lambda, phi) {
+	        var point1 = [lambda, phi],
+	            point2,
+	            v = visible(lambda, phi),
+	            c = smallRadius ? v ? 0 : code(lambda, phi) : v ? code(lambda + (lambda < 0 ? pi : -pi), phi) : 0;
+	        if (!point0 && (v00 = v0 = v)) stream.lineStart();
+
+	        if (v !== v0) {
+	          point2 = intersect(point0, point1);
+	          if (!point2 || pointEqual(point0, point2) || pointEqual(point1, point2)) point1[2] = 1;
+	        }
+
+	        if (v !== v0) {
+	          _clean = 0;
+
+	          if (v) {
+	            // outside going in
+	            stream.lineStart();
+	            point2 = intersect(point1, point0);
+	            stream.point(point2[0], point2[1]);
+	          } else {
+	            // inside going out
+	            point2 = intersect(point0, point1);
+	            stream.point(point2[0], point2[1], 2);
+	            stream.lineEnd();
+	          }
+
+	          point0 = point2;
+	        } else if (notHemisphere && point0 && smallRadius ^ v) {
+	          var t; // If the codes for two points are different, or are both zero,
+	          // and there this segment intersects with the small circle.
+
+	          if (!(c & c0) && (t = intersect(point1, point0, true))) {
+	            _clean = 0;
+
+	            if (smallRadius) {
+	              stream.lineStart();
+	              stream.point(t[0][0], t[0][1]);
+	              stream.point(t[1][0], t[1][1]);
+	              stream.lineEnd();
+	            } else {
+	              stream.point(t[1][0], t[1][1]);
+	              stream.lineEnd();
+	              stream.lineStart();
+	              stream.point(t[0][0], t[0][1], 3);
+	            }
+	          }
+	        }
+
+	        if (v && (!point0 || !pointEqual(point0, point1))) {
+	          stream.point(point1[0], point1[1]);
+	        }
+
+	        point0 = point1, v0 = v, c0 = c;
+	      },
+	      lineEnd: function lineEnd() {
+	        if (v0) stream.lineEnd();
+	        point0 = null;
+	      },
+	      // Rejoin first and last segments if there were intersections and the first
+	      // and last points were visible.
+	      clean: function clean() {
+	        return _clean | (v00 && v0) << 1;
+	      }
+	    };
+	  } // Intersects the great circle between a and b with the clip circle.
+
+
+	  function intersect(a, b, two) {
+	    var pa = cartesian(a),
+	        pb = cartesian(b); // We have two planes, n1.p = d1 and n2.p = d2.
+	    // Find intersection line p(t) = c1 n1 + c2 n2 + t (n1 ⨯ n2).
+
+	    var n1 = [1, 0, 0],
+	        // normal
+	    n2 = cartesianCross(pa, pb),
+	        n2n2 = cartesianDot(n2, n2),
+	        n1n2 = n2[0],
+	        // cartesianDot(n1, n2),
+	    determinant = n2n2 - n1n2 * n1n2; // Two polar points.
+
+	    if (!determinant) return !two && a;
+	    var c1 = cr * n2n2 / determinant,
+	        c2 = -cr * n1n2 / determinant,
+	        n1xn2 = cartesianCross(n1, n2),
+	        A = cartesianScale(n1, c1),
+	        B = cartesianScale(n2, c2);
+	    cartesianAddInPlace(A, B); // Solve |p(t)|^2 = 1.
+
+	    var u = n1xn2,
+	        w = cartesianDot(A, u),
+	        uu = cartesianDot(u, u),
+	        t2 = w * w - uu * (cartesianDot(A, A) - 1);
+	    if (t2 < 0) return;
+	    var t = sqrt(t2),
+	        q = cartesianScale(u, (-w - t) / uu);
+	    cartesianAddInPlace(q, A);
+	    q = spherical(q);
+	    if (!two) return q; // Two intersection points.
+
+	    var lambda0 = a[0],
+	        lambda1 = b[0],
+	        phi0 = a[1],
+	        phi1 = b[1],
+	        z;
+	    if (lambda1 < lambda0) z = lambda0, lambda0 = lambda1, lambda1 = z;
+	    var delta = lambda1 - lambda0,
+	        polar = abs$2(delta - pi) < epsilon$1,
+	        meridian = polar || delta < epsilon$1;
+	    if (!polar && phi1 < phi0) z = phi0, phi0 = phi1, phi1 = z; // Check that the first point is between a and b.
+
+	    if (meridian ? polar ? phi0 + phi1 > 0 ^ q[1] < (abs$2(q[0] - lambda0) < epsilon$1 ? phi0 : phi1) : phi0 <= q[1] && q[1] <= phi1 : delta > pi ^ (lambda0 <= q[0] && q[0] <= lambda1)) {
+	      var q1 = cartesianScale(u, (-w + t) / uu);
+	      cartesianAddInPlace(q1, A);
+	      return [q, spherical(q1)];
+	    }
+	  } // Generates a 4-bit vector representing the location of a point relative to
+	  // the small circle's bounding box.
+
+
+	  function code(lambda, phi) {
+	    var r = smallRadius ? radius : pi - radius,
+	        code = 0;
+	    if (lambda < -r) code |= 1; // left
+	    else if (lambda > r) code |= 2; // right
+
+	    if (phi < -r) code |= 4; // below
+	    else if (phi > r) code |= 8; // above
+
+	    return code;
+	  }
+
+	  return clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-pi, radius - pi]);
 	}
 
-	function d3_drag() {
-	  var filter = defaultFilter,
-	      container = defaultContainer,
-	      subject = defaultSubject,
-	      touchable = defaultTouchable,
-	      gestures = {},
-	      listeners = dispatch("start", "drag", "end"),
-	      active = 0,
-	      mousedownx,
-	      mousedowny,
-	      mousemoving,
-	      touchending,
-	      clickDistance2 = 0;
+	function clipLine (a, b, x0, y0, x1, y1) {
+	  var ax = a[0],
+	      ay = a[1],
+	      bx = b[0],
+	      by = b[1],
+	      t0 = 0,
+	      t1 = 1,
+	      dx = bx - ax,
+	      dy = by - ay,
+	      r;
+	  r = x0 - ax;
+	  if (!dx && r > 0) return;
+	  r /= dx;
 
-	  function drag(selection) {
-	    selection
-	        .on("mousedown.drag", mousedowned)
-	      .filter(touchable)
-	        .on("touchstart.drag", touchstarted)
-	        .on("touchmove.drag", touchmoved)
-	        .on("touchend.drag touchcancel.drag", touchended)
-	        .style("touch-action", "none")
-	        .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
-	  }
-
-	  function mousedowned() {
-	    if (touchending || !filter.apply(this, arguments)) { return; }
-	    var gesture = beforestart("mouse", container.apply(this, arguments), mouse, this, arguments);
-	    if (!gesture) { return; }
-	    select(event.view).on("mousemove.drag", mousemoved, true).on("mouseup.drag", mouseupped, true);
-	    dragDisable(event.view);
-	    nopropagation();
-	    mousemoving = false;
-	    mousedownx = event.clientX;
-	    mousedowny = event.clientY;
-	    gesture("start");
+	  if (dx < 0) {
+	    if (r < t0) return;
+	    if (r < t1) t1 = r;
+	  } else if (dx > 0) {
+	    if (r > t1) return;
+	    if (r > t0) t0 = r;
 	  }
 
-	  function mousemoved() {
-	    noevent();
-	    if (!mousemoving) {
-	      var dx = event.clientX - mousedownx, dy = event.clientY - mousedowny;
-	      mousemoving = dx * dx + dy * dy > clickDistance2;
-	    }
-	    gestures.mouse("drag");
+	  r = x1 - ax;
+	  if (!dx && r < 0) return;
+	  r /= dx;
+
+	  if (dx < 0) {
+	    if (r > t1) return;
+	    if (r > t0) t0 = r;
+	  } else if (dx > 0) {
+	    if (r < t0) return;
+	    if (r < t1) t1 = r;
 	  }
 
-	  function mouseupped() {
-	    select(event.view).on("mousemove.drag mouseup.drag", null);
-	    yesdrag(event.view, mousemoving);
-	    noevent();
-	    gestures.mouse("end");
+	  r = y0 - ay;
+	  if (!dy && r > 0) return;
+	  r /= dy;
+
+	  if (dy < 0) {
+	    if (r < t0) return;
+	    if (r < t1) t1 = r;
+	  } else if (dy > 0) {
+	    if (r > t1) return;
+	    if (r > t0) t0 = r;
 	  }
 
-	  function touchstarted() {
-	    var arguments$1 = arguments;
+	  r = y1 - ay;
+	  if (!dy && r < 0) return;
+	  r /= dy;
 
-	    if (!filter.apply(this, arguments)) { return; }
-	    var touches = event.changedTouches,
-	        c = container.apply(this, arguments),
-	        n = touches.length, i, gesture;
+	  if (dy < 0) {
+	    if (r > t1) return;
+	    if (r > t0) t0 = r;
+	  } else if (dy > 0) {
+	    if (r < t0) return;
+	    if (r < t1) t1 = r;
+	  }
 
-	    for (i = 0; i < n; ++i) {
-	      if (gesture = beforestart(touches[i].identifier, c, touch, this, arguments$1)) {
-	        nopropagation();
-	        gesture("start");
-	      }
-	    }
+	  if (t0 > 0) a[0] = ax + t0 * dx, a[1] = ay + t0 * dy;
+	  if (t1 < 1) b[0] = ax + t1 * dx, b[1] = ay + t1 * dy;
+	  return true;
+	}
+
+	var clipMax = 1e9,
+	    clipMin = -clipMax; // TODO Use d3-polygon’s polygonContains here for the ring check?
+	// TODO Eliminate duplicate buffering in clipBuffer and polygon.push?
+
+	function clipRectangle(x0, y0, x1, y1) {
+	  function visible(x, y) {
+	    return x0 <= x && x <= x1 && y0 <= y && y <= y1;
 	  }
 
-	  function touchmoved() {
-	    var touches = event.changedTouches,
-	        n = touches.length, i, gesture;
+	  function interpolate(from, to, direction, stream) {
+	    var a = 0,
+	        a1 = 0;
 
-	    for (i = 0; i < n; ++i) {
-	      if (gesture = gestures[touches[i].identifier]) {
-	        noevent();
-	        gesture("drag");
-	      }
+	    if (from == null || (a = corner(from, direction)) !== (a1 = corner(to, direction)) || comparePoint(from, to) < 0 ^ direction > 0) {
+	      do {
+	        stream.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0);
+	      } while ((a = (a + direction + 4) % 4) !== a1);
+	    } else {
+	      stream.point(to[0], to[1]);
 	    }
 	  }
 
-	  function touchended() {
-	    var touches = event.changedTouches,
-	        n = touches.length, i, gesture;
+	  function corner(p, direction) {
+	    return abs$2(p[0] - x0) < epsilon$1 ? direction > 0 ? 0 : 3 : abs$2(p[0] - x1) < epsilon$1 ? direction > 0 ? 2 : 1 : abs$2(p[1] - y0) < epsilon$1 ? direction > 0 ? 1 : 0 : direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon
+	  }
 
-	    if (touchending) { clearTimeout(touchending); }
-	    touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!
-	    for (i = 0; i < n; ++i) {
-	      if (gesture = gestures[touches[i].identifier]) {
-	        nopropagation();
-	        gesture("end");
-	      }
-	    }
+	  function compareIntersection(a, b) {
+	    return comparePoint(a.x, b.x);
 	  }
 
-	  function beforestart(id, container, point, that, args) {
-	    var p = point(container, id), s, dx, dy,
-	        sublisteners = listeners.copy();
+	  function comparePoint(a, b) {
+	    var ca = corner(a, 1),
+	        cb = corner(b, 1);
+	    return ca !== cb ? ca - cb : ca === 0 ? b[1] - a[1] : ca === 1 ? a[0] - b[0] : ca === 2 ? a[1] - b[1] : b[0] - a[0];
+	  }
 
-	    if (!customEvent(new DragEvent(drag, "beforestart", s, id, active, p[0], p[1], 0, 0, sublisteners), function() {
-	      if ((event.subject = s = subject.apply(that, args)) == null) { return false; }
-	      dx = s.x - p[0] || 0;
-	      dy = s.y - p[1] || 0;
-	      return true;
-	    })) { return; }
+	  return function (stream) {
+	    var activeStream = stream,
+	        bufferStream = clipBuffer(),
+	        segments,
+	        polygon,
+	        ring,
+	        x__,
+	        y__,
+	        v__,
+	        // first point
+	    x_,
+	        y_,
+	        v_,
+	        // previous point
+	    first,
+	        clean;
+	    var clipStream = {
+	      point: point,
+	      lineStart: lineStart,
+	      lineEnd: lineEnd,
+	      polygonStart: polygonStart,
+	      polygonEnd: polygonEnd
+	    };
 
-	    return function gesture(type) {
-	      var p0 = p, n;
-	      switch (type) {
-	        case "start": gestures[id] = gesture, n = active++; break;
-	        case "end": delete gestures[id], --active; // nobreak
-	        case "drag": p = point(container, id), n = active; break;
+	    function point(x, y) {
+	      if (visible(x, y)) activeStream.point(x, y);
+	    }
+
+	    function polygonInside() {
+	      var winding = 0;
+
+	      for (var i = 0, n = polygon.length; i < n; ++i) {
+	        for (var ring = polygon[i], j = 1, m = ring.length, point = ring[0], a0, a1, b0 = point[0], b1 = point[1]; j < m; ++j) {
+	          a0 = b0, a1 = b1, point = ring[j], b0 = point[0], b1 = point[1];
+
+	          if (a1 <= y1) {
+	            if (b1 > y1 && (b0 - a0) * (y1 - a1) > (b1 - a1) * (x0 - a0)) ++winding;
+	          } else {
+	            if (b1 <= y1 && (b0 - a0) * (y1 - a1) < (b1 - a1) * (x0 - a0)) --winding;
+	          }
+	        }
 	      }
-	      customEvent(new DragEvent(drag, type, s, id, n, p[0] + dx, p[1] + dy, p[0] - p0[0], p[1] - p0[1], sublisteners), sublisteners.apply, sublisteners, [type, that, args]);
-	    };
-	  }
 
-	  drag.filter = function(_) {
-	    return arguments.length ? (filter = typeof _ === "function" ? _ : constant$1(!!_), drag) : filter;
-	  };
+	      return winding;
+	    } // Buffer geometry within a polygon and then clip it en masse.
 
-	  drag.container = function(_) {
-	    return arguments.length ? (container = typeof _ === "function" ? _ : constant$1(_), drag) : container;
-	  };
 
-	  drag.subject = function(_) {
-	    return arguments.length ? (subject = typeof _ === "function" ? _ : constant$1(_), drag) : subject;
-	  };
+	    function polygonStart() {
+	      activeStream = bufferStream, segments = [], polygon = [], clean = true;
+	    }
 
-	  drag.touchable = function(_) {
-	    return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$1(!!_), drag) : touchable;
-	  };
+	    function polygonEnd() {
+	      var startInside = polygonInside(),
+	          cleanInside = clean && startInside,
+	          visible = (segments = merge$4(segments)).length;
 
-	  drag.on = function() {
-	    var value = listeners.on.apply(listeners, arguments);
-	    return value === listeners ? drag : value;
-	  };
+	      if (cleanInside || visible) {
+	        stream.polygonStart();
 
-	  drag.clickDistance = function(_) {
-	    return arguments.length ? (clickDistance2 = (_ = +_) * _, drag) : Math.sqrt(clickDistance2);
-	  };
+	        if (cleanInside) {
+	          stream.lineStart();
+	          interpolate(null, null, 1, stream);
+	          stream.lineEnd();
+	        }
 
-	  return drag;
-	}
+	        if (visible) {
+	          clipRejoin(segments, compareIntersection, startInside, interpolate, stream);
+	        }
 
-	function define$1(constructor, factory, prototype) {
-	  constructor.prototype = factory.prototype = prototype;
-	  prototype.constructor = constructor;
-	}
+	        stream.polygonEnd();
+	      }
 
-	function extend(parent, definition) {
-	  var prototype = Object.create(parent.prototype);
-	  for (var key in definition) { prototype[key] = definition[key]; }
-	  return prototype;
-	}
+	      activeStream = stream, segments = polygon = ring = null;
+	    }
 
-	function Color() {}
+	    function lineStart() {
+	      clipStream.point = linePoint;
+	      if (polygon) polygon.push(ring = []);
+	      first = true;
+	      v_ = false;
+	      x_ = y_ = NaN;
+	    } // TODO rather than special-case polygons, simply handle them separately.
+	    // Ideally, coincident intersection points should be jittered to avoid
+	    // clipping issues.
 
-	var darker = 0.7;
-	var brighter = 1 / darker;
 
-	var reI = "\\s*([+-]?\\d+)\\s*",
-	    reN = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)\\s*",
-	    reP = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)%\\s*",
-	    reHex = /^#([0-9a-f]{3,8})$/,
-	    reRgbInteger = new RegExp("^rgb\\(" + [reI, reI, reI] + "\\)$"),
-	    reRgbPercent = new RegExp("^rgb\\(" + [reP, reP, reP] + "\\)$"),
-	    reRgbaInteger = new RegExp("^rgba\\(" + [reI, reI, reI, reN] + "\\)$"),
-	    reRgbaPercent = new RegExp("^rgba\\(" + [reP, reP, reP, reN] + "\\)$"),
-	    reHslPercent = new RegExp("^hsl\\(" + [reN, reP, reP] + "\\)$"),
-	    reHslaPercent = new RegExp("^hsla\\(" + [reN, reP, reP, reN] + "\\)$");
+	    function lineEnd() {
+	      if (segments) {
+	        linePoint(x__, y__);
+	        if (v__ && v_) bufferStream.rejoin();
+	        segments.push(bufferStream.result());
+	      }
 
-	var named = {
-	  aliceblue: 0xf0f8ff,
-	  antiquewhite: 0xfaebd7,
-	  aqua: 0x00ffff,
-	  aquamarine: 0x7fffd4,
-	  azure: 0xf0ffff,
-	  beige: 0xf5f5dc,
-	  bisque: 0xffe4c4,
-	  black: 0x000000,
-	  blanchedalmond: 0xffebcd,
-	  blue: 0x0000ff,
-	  blueviolet: 0x8a2be2,
-	  brown: 0xa52a2a,
-	  burlywood: 0xdeb887,
-	  cadetblue: 0x5f9ea0,
-	  chartreuse: 0x7fff00,
-	  chocolate: 0xd2691e,
-	  coral: 0xff7f50,
-	  cornflowerblue: 0x6495ed,
-	  cornsilk: 0xfff8dc,
-	  crimson: 0xdc143c,
-	  cyan: 0x00ffff,
-	  darkblue: 0x00008b,
-	  darkcyan: 0x008b8b,
-	  darkgoldenrod: 0xb8860b,
-	  darkgray: 0xa9a9a9,
-	  darkgreen: 0x006400,
-	  darkgrey: 0xa9a9a9,
-	  darkkhaki: 0xbdb76b,
-	  darkmagenta: 0x8b008b,
-	  darkolivegreen: 0x556b2f,
-	  darkorange: 0xff8c00,
-	  darkorchid: 0x9932cc,
-	  darkred: 0x8b0000,
-	  darksalmon: 0xe9967a,
-	  darkseagreen: 0x8fbc8f,
-	  darkslateblue: 0x483d8b,
-	  darkslategray: 0x2f4f4f,
-	  darkslategrey: 0x2f4f4f,
-	  darkturquoise: 0x00ced1,
-	  darkviolet: 0x9400d3,
-	  deeppink: 0xff1493,
-	  deepskyblue: 0x00bfff,
-	  dimgray: 0x696969,
-	  dimgrey: 0x696969,
-	  dodgerblue: 0x1e90ff,
-	  firebrick: 0xb22222,
-	  floralwhite: 0xfffaf0,
-	  forestgreen: 0x228b22,
-	  fuchsia: 0xff00ff,
-	  gainsboro: 0xdcdcdc,
-	  ghostwhite: 0xf8f8ff,
-	  gold: 0xffd700,
-	  goldenrod: 0xdaa520,
-	  gray: 0x808080,
-	  green: 0x008000,
-	  greenyellow: 0xadff2f,
-	  grey: 0x808080,
-	  honeydew: 0xf0fff0,
-	  hotpink: 0xff69b4,
-	  indianred: 0xcd5c5c,
-	  indigo: 0x4b0082,
-	  ivory: 0xfffff0,
-	  khaki: 0xf0e68c,
-	  lavender: 0xe6e6fa,
-	  lavenderblush: 0xfff0f5,
-	  lawngreen: 0x7cfc00,
-	  lemonchiffon: 0xfffacd,
-	  lightblue: 0xadd8e6,
-	  lightcoral: 0xf08080,
-	  lightcyan: 0xe0ffff,
-	  lightgoldenrodyellow: 0xfafad2,
-	  lightgray: 0xd3d3d3,
-	  lightgreen: 0x90ee90,
-	  lightgrey: 0xd3d3d3,
-	  lightpink: 0xffb6c1,
-	  lightsalmon: 0xffa07a,
-	  lightseagreen: 0x20b2aa,
-	  lightskyblue: 0x87cefa,
-	  lightslategray: 0x778899,
-	  lightslategrey: 0x778899,
-	  lightsteelblue: 0xb0c4de,
-	  lightyellow: 0xffffe0,
-	  lime: 0x00ff00,
-	  limegreen: 0x32cd32,
-	  linen: 0xfaf0e6,
-	  magenta: 0xff00ff,
-	  maroon: 0x800000,
-	  mediumaquamarine: 0x66cdaa,
-	  mediumblue: 0x0000cd,
-	  mediumorchid: 0xba55d3,
-	  mediumpurple: 0x9370db,
-	  mediumseagreen: 0x3cb371,
-	  mediumslateblue: 0x7b68ee,
-	  mediumspringgreen: 0x00fa9a,
-	  mediumturquoise: 0x48d1cc,
-	  mediumvioletred: 0xc71585,
-	  midnightblue: 0x191970,
-	  mintcream: 0xf5fffa,
-	  mistyrose: 0xffe4e1,
-	  moccasin: 0xffe4b5,
-	  navajowhite: 0xffdead,
-	  navy: 0x000080,
-	  oldlace: 0xfdf5e6,
-	  olive: 0x808000,
-	  olivedrab: 0x6b8e23,
-	  orange: 0xffa500,
-	  orangered: 0xff4500,
-	  orchid: 0xda70d6,
-	  palegoldenrod: 0xeee8aa,
-	  palegreen: 0x98fb98,
-	  paleturquoise: 0xafeeee,
-	  palevioletred: 0xdb7093,
-	  papayawhip: 0xffefd5,
-	  peachpuff: 0xffdab9,
-	  peru: 0xcd853f,
-	  pink: 0xffc0cb,
-	  plum: 0xdda0dd,
-	  powderblue: 0xb0e0e6,
-	  purple: 0x800080,
-	  rebeccapurple: 0x663399,
-	  red: 0xff0000,
-	  rosybrown: 0xbc8f8f,
-	  royalblue: 0x4169e1,
-	  saddlebrown: 0x8b4513,
-	  salmon: 0xfa8072,
-	  sandybrown: 0xf4a460,
-	  seagreen: 0x2e8b57,
-	  seashell: 0xfff5ee,
-	  sienna: 0xa0522d,
-	  silver: 0xc0c0c0,
-	  skyblue: 0x87ceeb,
-	  slateblue: 0x6a5acd,
-	  slategray: 0x708090,
-	  slategrey: 0x708090,
-	  snow: 0xfffafa,
-	  springgreen: 0x00ff7f,
-	  steelblue: 0x4682b4,
-	  tan: 0xd2b48c,
-	  teal: 0x008080,
-	  thistle: 0xd8bfd8,
-	  tomato: 0xff6347,
-	  turquoise: 0x40e0d0,
-	  violet: 0xee82ee,
-	  wheat: 0xf5deb3,
-	  white: 0xffffff,
-	  whitesmoke: 0xf5f5f5,
-	  yellow: 0xffff00,
-	  yellowgreen: 0x9acd32
-	};
+	      clipStream.point = point;
+	      if (v_) activeStream.lineEnd();
+	    }
 
-	define$1(Color, color, {
-	  copy: function(channels) {
-	    return Object.assign(new this.constructor, this, channels);
-	  },
-	  displayable: function() {
-	    return this.rgb().displayable();
-	  },
-	  hex: color_formatHex, // Deprecated! Use color.formatHex.
-	  formatHex: color_formatHex,
-	  formatHsl: color_formatHsl,
-	  formatRgb: color_formatRgb,
-	  toString: color_formatRgb
-	});
+	    function linePoint(x, y) {
+	      var v = visible(x, y);
+	      if (polygon) ring.push([x, y]);
 
-	function color_formatHex() {
-	  return this.rgb().formatHex();
-	}
+	      if (first) {
+	        x__ = x, y__ = y, v__ = v;
+	        first = false;
 
-	function color_formatHsl() {
-	  return hslConvert(this).formatHsl();
-	}
+	        if (v) {
+	          activeStream.lineStart();
+	          activeStream.point(x, y);
+	        }
+	      } else {
+	        if (v && v_) activeStream.point(x, y);else {
+	          var a = [x_ = Math.max(clipMin, Math.min(clipMax, x_)), y_ = Math.max(clipMin, Math.min(clipMax, y_))],
+	              b = [x = Math.max(clipMin, Math.min(clipMax, x)), y = Math.max(clipMin, Math.min(clipMax, y))];
 
-	function color_formatRgb() {
-	  return this.rgb().formatRgb();
-	}
+	          if (clipLine(a, b, x0, y0, x1, y1)) {
+	            if (!v_) {
+	              activeStream.lineStart();
+	              activeStream.point(a[0], a[1]);
+	            }
 
-	function color(format) {
-	  var m, l;
-	  format = (format + "").trim().toLowerCase();
-	  return (m = reHex.exec(format)) ? (l = m[1].length, m = parseInt(m[1], 16), l === 6 ? rgbn(m) // #ff0000
-	      : l === 3 ? new Rgb((m >> 8 & 0xf) | (m >> 4 & 0xf0), (m >> 4 & 0xf) | (m & 0xf0), ((m & 0xf) << 4) | (m & 0xf), 1) // #f00
-	      : l === 8 ? rgba(m >> 24 & 0xff, m >> 16 & 0xff, m >> 8 & 0xff, (m & 0xff) / 0xff) // #ff000000
-	      : l === 4 ? rgba((m >> 12 & 0xf) | (m >> 8 & 0xf0), (m >> 8 & 0xf) | (m >> 4 & 0xf0), (m >> 4 & 0xf) | (m & 0xf0), (((m & 0xf) << 4) | (m & 0xf)) / 0xff) // #f000
-	      : null) // invalid hex
-	      : (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)
-	      : (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)
-	      : (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)
-	      : (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)
-	      : (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)
-	      : (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)
-	      : named.hasOwnProperty(format) ? rgbn(named[format]) // eslint-disable-line no-prototype-builtins
-	      : format === "transparent" ? new Rgb(NaN, NaN, NaN, 0)
-	      : null;
+	            activeStream.point(b[0], b[1]);
+	            if (!v) activeStream.lineEnd();
+	            clean = false;
+	          } else if (v) {
+	            activeStream.lineStart();
+	            activeStream.point(x, y);
+	            clean = false;
+	          }
+	        }
+	      }
+
+	      x_ = x, y_ = y, v_ = v;
+	    }
+
+	    return clipStream;
+	  };
 	}
 
-	function rgbn(n) {
-	  return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);
+	var lengthSum$1, lambda0, sinPhi0, cosPhi0;
+	var lengthStream$1 = {
+	  sphere: noop$1,
+	  point: noop$1,
+	  lineStart: lengthLineStart,
+	  lineEnd: noop$1,
+	  polygonStart: noop$1,
+	  polygonEnd: noop$1
+	};
+
+	function lengthLineStart() {
+	  lengthStream$1.point = lengthPointFirst$1;
+	  lengthStream$1.lineEnd = lengthLineEnd;
 	}
 
-	function rgba(r, g, b, a) {
-	  if (a <= 0) { r = g = b = NaN; }
-	  return new Rgb(r, g, b, a);
+	function lengthLineEnd() {
+	  lengthStream$1.point = lengthStream$1.lineEnd = noop$1;
 	}
 
-	function rgbConvert(o) {
-	  if (!(o instanceof Color)) { o = color(o); }
-	  if (!o) { return new Rgb; }
-	  o = o.rgb();
-	  return new Rgb(o.r, o.g, o.b, o.opacity);
+	function lengthPointFirst$1(lambda, phi) {
+	  lambda *= radians, phi *= radians;
+	  lambda0 = lambda, sinPhi0 = sin(phi), cosPhi0 = cos(phi);
+	  lengthStream$1.point = lengthPoint$1;
 	}
 
-	function rgb(r, g, b, opacity) {
-	  return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity);
+	function lengthPoint$1(lambda, phi) {
+	  lambda *= radians, phi *= radians;
+	  var sinPhi = sin(phi),
+	      cosPhi = cos(phi),
+	      delta = abs$2(lambda - lambda0),
+	      cosDelta = cos(delta),
+	      sinDelta = sin(delta),
+	      x = cosPhi * sinDelta,
+	      y = cosPhi0 * sinPhi - sinPhi0 * cosPhi * cosDelta,
+	      z = sinPhi0 * sinPhi + cosPhi0 * cosPhi * cosDelta;
+	  lengthSum$1.add(atan2(sqrt(x * x + y * y), z));
+	  lambda0 = lambda, sinPhi0 = sinPhi, cosPhi0 = cosPhi;
 	}
 
-	function Rgb(r, g, b, opacity) {
-	  this.r = +r;
-	  this.g = +g;
-	  this.b = +b;
-	  this.opacity = +opacity;
+	function d3_geoLength (object) {
+	  lengthSum$1 = new Adder();
+	  d3_geoStream(object, lengthStream$1);
+	  return +lengthSum$1;
 	}
 
-	define$1(Rgb, rgb, extend(Color, {
-	  brighter: function(k) {
-	    k = k == null ? brighter : Math.pow(brighter, k);
-	    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
-	  },
-	  darker: function(k) {
-	    k = k == null ? darker : Math.pow(darker, k);
-	    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
-	  },
-	  rgb: function() {
-	    return this;
+	var identity$4 = (function (x) {
+	  return x;
+	});
+
+	var areaSum = new Adder(),
+	    areaRingSum = new Adder(),
+	    x00$2,
+	    y00$2,
+	    x0$3,
+	    y0$3;
+	var areaStream = {
+	  point: noop$1,
+	  lineStart: noop$1,
+	  lineEnd: noop$1,
+	  polygonStart: function polygonStart() {
+	    areaStream.lineStart = areaRingStart;
+	    areaStream.lineEnd = areaRingEnd;
 	  },
-	  displayable: function() {
-	    return (-0.5 <= this.r && this.r < 255.5)
-	        && (-0.5 <= this.g && this.g < 255.5)
-	        && (-0.5 <= this.b && this.b < 255.5)
-	        && (0 <= this.opacity && this.opacity <= 1);
+	  polygonEnd: function polygonEnd() {
+	    areaStream.lineStart = areaStream.lineEnd = areaStream.point = noop$1;
+	    areaSum.add(abs$2(areaRingSum));
+	    areaRingSum = new Adder();
 	  },
-	  hex: rgb_formatHex, // Deprecated! Use color.formatHex.
-	  formatHex: rgb_formatHex,
-	  formatRgb: rgb_formatRgb,
-	  toString: rgb_formatRgb
-	}));
+	  result: function result() {
+	    var area = areaSum / 2;
+	    areaSum = new Adder();
+	    return area;
+	  }
+	};
 
-	function rgb_formatHex() {
-	  return "#" + hex$1(this.r) + hex$1(this.g) + hex$1(this.b);
+	function areaRingStart() {
+	  areaStream.point = areaPointFirst;
 	}
 
-	function rgb_formatRgb() {
-	  var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
-	  return (a === 1 ? "rgb(" : "rgba(")
-	      + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", "
-	      + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", "
-	      + Math.max(0, Math.min(255, Math.round(this.b) || 0))
-	      + (a === 1 ? ")" : ", " + a + ")");
+	function areaPointFirst(x, y) {
+	  areaStream.point = areaPoint;
+	  x00$2 = x0$3 = x, y00$2 = y0$3 = y;
 	}
 
-	function hex$1(value) {
-	  value = Math.max(0, Math.min(255, Math.round(value) || 0));
-	  return (value < 16 ? "0" : "") + value.toString(16);
+	function areaPoint(x, y) {
+	  areaRingSum.add(y0$3 * x - x0$3 * y);
+	  x0$3 = x, y0$3 = y;
 	}
 
-	function hsla(h, s, l, a) {
-	  if (a <= 0) { h = s = l = NaN; }
-	  else if (l <= 0 || l >= 1) { h = s = NaN; }
-	  else if (s <= 0) { h = NaN; }
-	  return new Hsl(h, s, l, a);
+	function areaRingEnd() {
+	  areaPoint(x00$2, y00$2);
 	}
 
-	function hslConvert(o) {
-	  if (o instanceof Hsl) { return new Hsl(o.h, o.s, o.l, o.opacity); }
-	  if (!(o instanceof Color)) { o = color(o); }
-	  if (!o) { return new Hsl; }
-	  if (o instanceof Hsl) { return o; }
-	  o = o.rgb();
-	  var r = o.r / 255,
-	      g = o.g / 255,
-	      b = o.b / 255,
-	      min = Math.min(r, g, b),
-	      max = Math.max(r, g, b),
-	      h = NaN,
-	      s = max - min,
-	      l = (max + min) / 2;
-	  if (s) {
-	    if (r === max) { h = (g - b) / s + (g < b) * 6; }
-	    else if (g === max) { h = (b - r) / s + 2; }
-	    else { h = (r - g) / s + 4; }
-	    s /= l < 0.5 ? max + min : 2 - max - min;
-	    h *= 60;
-	  } else {
-	    s = l > 0 && l < 1 ? 0 : h;
+	var x0$2 = Infinity,
+	    y0$2 = x0$2,
+	    x1 = -x0$2,
+	    y1 = x1;
+	var boundsStream = {
+	  point: boundsPoint,
+	  lineStart: noop$1,
+	  lineEnd: noop$1,
+	  polygonStart: noop$1,
+	  polygonEnd: noop$1,
+	  result: function result() {
+	    var bounds = [[x0$2, y0$2], [x1, y1]];
+	    x1 = y1 = -(y0$2 = x0$2 = Infinity);
+	    return bounds;
 	  }
-	  return new Hsl(h, s, l, o.opacity);
-	}
-
-	function hsl(h, s, l, opacity) {
-	  return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity);
-	}
+	};
 
-	function Hsl(h, s, l, opacity) {
-	  this.h = +h;
-	  this.s = +s;
-	  this.l = +l;
-	  this.opacity = +opacity;
+	function boundsPoint(x, y) {
+	  if (x < x0$2) x0$2 = x;
+	  if (x > x1) x1 = x;
+	  if (y < y0$2) y0$2 = y;
+	  if (y > y1) y1 = y;
 	}
 
-	define$1(Hsl, hsl, extend(Color, {
-	  brighter: function(k) {
-	    k = k == null ? brighter : Math.pow(brighter, k);
-	    return new Hsl(this.h, this.s, this.l * k, this.opacity);
-	  },
-	  darker: function(k) {
-	    k = k == null ? darker : Math.pow(darker, k);
-	    return new Hsl(this.h, this.s, this.l * k, this.opacity);
-	  },
-	  rgb: function() {
-	    var h = this.h % 360 + (this.h < 0) * 360,
-	        s = isNaN(h) || isNaN(this.s) ? 0 : this.s,
-	        l = this.l,
-	        m2 = l + (l < 0.5 ? l : 1 - l) * s,
-	        m1 = 2 * l - m2;
-	    return new Rgb(
-	      hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2),
-	      hsl2rgb(h, m1, m2),
-	      hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2),
-	      this.opacity
-	    );
+	var X0 = 0,
+	    Y0 = 0,
+	    Z0 = 0,
+	    X1 = 0,
+	    Y1 = 0,
+	    Z1 = 0,
+	    X2 = 0,
+	    Y2 = 0,
+	    Z2 = 0,
+	    x00$1,
+	    y00$1,
+	    x0$1,
+	    y0$1;
+	var centroidStream = {
+	  point: centroidPoint,
+	  lineStart: centroidLineStart,
+	  lineEnd: centroidLineEnd,
+	  polygonStart: function polygonStart() {
+	    centroidStream.lineStart = centroidRingStart;
+	    centroidStream.lineEnd = centroidRingEnd;
 	  },
-	  displayable: function() {
-	    return (0 <= this.s && this.s <= 1 || isNaN(this.s))
-	        && (0 <= this.l && this.l <= 1)
-	        && (0 <= this.opacity && this.opacity <= 1);
+	  polygonEnd: function polygonEnd() {
+	    centroidStream.point = centroidPoint;
+	    centroidStream.lineStart = centroidLineStart;
+	    centroidStream.lineEnd = centroidLineEnd;
 	  },
-	  formatHsl: function() {
-	    var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
-	    return (a === 1 ? "hsl(" : "hsla(")
-	        + (this.h || 0) + ", "
-	        + (this.s || 0) * 100 + "%, "
-	        + (this.l || 0) * 100 + "%"
-	        + (a === 1 ? ")" : ", " + a + ")");
+	  result: function result() {
+	    var centroid = Z2 ? [X2 / Z2, Y2 / Z2] : Z1 ? [X1 / Z1, Y1 / Z1] : Z0 ? [X0 / Z0, Y0 / Z0] : [NaN, NaN];
+	    X0 = Y0 = Z0 = X1 = Y1 = Z1 = X2 = Y2 = Z2 = 0;
+	    return centroid;
 	  }
-	}));
+	};
 
-	/* From FvD 13.37, CSS Color Module Level 3 */
-	function hsl2rgb(h, m1, m2) {
-	  return (h < 60 ? m1 + (m2 - m1) * h / 60
-	      : h < 180 ? m2
-	      : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60
-	      : m1) * 255;
+	function centroidPoint(x, y) {
+	  X0 += x;
+	  Y0 += y;
+	  ++Z0;
 	}
 
-	function constant$2(x) {
-	  return function() {
-	    return x;
-	  };
+	function centroidLineStart() {
+	  centroidStream.point = centroidPointFirstLine;
 	}
 
-	function linear(a, d) {
-	  return function(t) {
-	    return a + t * d;
-	  };
+	function centroidPointFirstLine(x, y) {
+	  centroidStream.point = centroidPointLine;
+	  centroidPoint(x0$1 = x, y0$1 = y);
 	}
 
-	function exponential(a, b, y) {
-	  return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function(t) {
-	    return Math.pow(a + t * b, y);
-	  };
+	function centroidPointLine(x, y) {
+	  var dx = x - x0$1,
+	      dy = y - y0$1,
+	      z = sqrt(dx * dx + dy * dy);
+	  X1 += z * (x0$1 + x) / 2;
+	  Y1 += z * (y0$1 + y) / 2;
+	  Z1 += z;
+	  centroidPoint(x0$1 = x, y0$1 = y);
 	}
 
-	function gamma(y) {
-	  return (y = +y) === 1 ? nogamma : function(a, b) {
-	    return b - a ? exponential(a, b, y) : constant$2(isNaN(a) ? b : a);
-	  };
+	function centroidLineEnd() {
+	  centroidStream.point = centroidPoint;
 	}
 
-	function nogamma(a, b) {
-	  var d = b - a;
-	  return d ? linear(a, d) : constant$2(isNaN(a) ? b : a);
+	function centroidRingStart() {
+	  centroidStream.point = centroidPointFirstRing;
 	}
 
-	var d3_interpolateRgb = (function rgbGamma(y) {
-	  var color = gamma(y);
-
-	  function rgb$1(start, end) {
-	    var r = color((start = rgb(start)).r, (end = rgb(end)).r),
-	        g = color(start.g, end.g),
-	        b = color(start.b, end.b),
-	        opacity = nogamma(start.opacity, end.opacity);
-	    return function(t) {
-	      start.r = r(t);
-	      start.g = g(t);
-	      start.b = b(t);
-	      start.opacity = opacity(t);
-	      return start + "";
-	    };
-	  }
-
-	  rgb$1.gamma = rgbGamma;
+	function centroidRingEnd() {
+	  centroidPointRing(x00$1, y00$1);
+	}
 
-	  return rgb$1;
-	})(1);
+	function centroidPointFirstRing(x, y) {
+	  centroidStream.point = centroidPointRing;
+	  centroidPoint(x00$1 = x0$1 = x, y00$1 = y0$1 = y);
+	}
 
-	function numberArray(a, b) {
-	  if (!b) { b = []; }
-	  var n = a ? Math.min(b.length, a.length) : 0,
-	      c = b.slice(),
-	      i;
-	  return function(t) {
-	    for (i = 0; i < n; ++i) { c[i] = a[i] * (1 - t) + b[i] * t; }
-	    return c;
-	  };
+	function centroidPointRing(x, y) {
+	  var dx = x - x0$1,
+	      dy = y - y0$1,
+	      z = sqrt(dx * dx + dy * dy);
+	  X1 += z * (x0$1 + x) / 2;
+	  Y1 += z * (y0$1 + y) / 2;
+	  Z1 += z;
+	  z = y0$1 * x - x0$1 * y;
+	  X2 += z * (x0$1 + x);
+	  Y2 += z * (y0$1 + y);
+	  Z2 += z * 3;
+	  centroidPoint(x0$1 = x, y0$1 = y);
 	}
 
-	function isNumberArray(x) {
-	  return ArrayBuffer.isView(x) && !(x instanceof DataView);
+	function PathContext(context) {
+	  this._context = context;
 	}
+	PathContext.prototype = {
+	  _radius: 4.5,
+	  pointRadius: function pointRadius(_) {
+	    return this._radius = _, this;
+	  },
+	  polygonStart: function polygonStart() {
+	    this._line = 0;
+	  },
+	  polygonEnd: function polygonEnd() {
+	    this._line = NaN;
+	  },
+	  lineStart: function lineStart() {
+	    this._point = 0;
+	  },
+	  lineEnd: function lineEnd() {
+	    if (this._line === 0) this._context.closePath();
+	    this._point = NaN;
+	  },
+	  point: function point(x, y) {
+	    switch (this._point) {
+	      case 0:
+	        {
+	          this._context.moveTo(x, y);
 
-	function genericArray(a, b) {
-	  var nb = b ? b.length : 0,
-	      na = a ? Math.min(nb, a.length) : 0,
-	      x = new Array(na),
-	      c = new Array(nb),
-	      i;
+	          this._point = 1;
+	          break;
+	        }
 
-	  for (i = 0; i < na; ++i) { x[i] = interpolate(a[i], b[i]); }
-	  for (; i < nb; ++i) { c[i] = b[i]; }
+	      case 1:
+	        {
+	          this._context.lineTo(x, y);
 
-	  return function(t) {
-	    for (i = 0; i < na; ++i) { c[i] = x[i](t); }
-	    return c;
-	  };
+	          break;
+	        }
+
+	      default:
+	        {
+	          this._context.moveTo(x + this._radius, y);
+
+	          this._context.arc(x, y, this._radius, 0, tau);
+
+	          break;
+	        }
+	    }
+	  },
+	  result: noop$1
+	};
+
+	var lengthSum = new Adder(),
+	    lengthRing,
+	    x00,
+	    y00,
+	    x0,
+	    y0;
+	var lengthStream = {
+	  point: noop$1,
+	  lineStart: function lineStart() {
+	    lengthStream.point = lengthPointFirst;
+	  },
+	  lineEnd: function lineEnd() {
+	    if (lengthRing) lengthPoint(x00, y00);
+	    lengthStream.point = noop$1;
+	  },
+	  polygonStart: function polygonStart() {
+	    lengthRing = true;
+	  },
+	  polygonEnd: function polygonEnd() {
+	    lengthRing = null;
+	  },
+	  result: function result() {
+	    var length = +lengthSum;
+	    lengthSum = new Adder();
+	    return length;
+	  }
+	};
+
+	function lengthPointFirst(x, y) {
+	  lengthStream.point = lengthPoint;
+	  x00 = x0 = x, y00 = y0 = y;
 	}
 
-	function date(a, b) {
-	  var d = new Date;
-	  return a = +a, b = +b, function(t) {
-	    return d.setTime(a * (1 - t) + b * t), d;
-	  };
+	function lengthPoint(x, y) {
+	  x0 -= x, y0 -= y;
+	  lengthSum.add(sqrt(x0 * x0 + y0 * y0));
+	  x0 = x, y0 = y;
 	}
 
-	function d3_interpolateNumber(a, b) {
-	  return a = +a, b = +b, function(t) {
-	    return a * (1 - t) + b * t;
-	  };
+	function PathString() {
+	  this._string = [];
 	}
+	PathString.prototype = {
+	  _radius: 4.5,
+	  _circle: circle(4.5),
+	  pointRadius: function pointRadius(_) {
+	    if ((_ = +_) !== this._radius) this._radius = _, this._circle = null;
+	    return this;
+	  },
+	  polygonStart: function polygonStart() {
+	    this._line = 0;
+	  },
+	  polygonEnd: function polygonEnd() {
+	    this._line = NaN;
+	  },
+	  lineStart: function lineStart() {
+	    this._point = 0;
+	  },
+	  lineEnd: function lineEnd() {
+	    if (this._line === 0) this._string.push("Z");
+	    this._point = NaN;
+	  },
+	  point: function point(x, y) {
+	    switch (this._point) {
+	      case 0:
+	        {
+	          this._string.push("M", x, ",", y);
 
-	function object(a, b) {
-	  var i = {},
-	      c = {},
-	      k;
+	          this._point = 1;
+	          break;
+	        }
 
-	  if (a === null || typeof a !== "object") { a = {}; }
-	  if (b === null || typeof b !== "object") { b = {}; }
+	      case 1:
+	        {
+	          this._string.push("L", x, ",", y);
 
-	  for (k in b) {
-	    if (k in a) {
-	      i[k] = interpolate(a[k], b[k]);
+	          break;
+	        }
+
+	      default:
+	        {
+	          if (this._circle == null) this._circle = circle(this._radius);
+
+	          this._string.push("M", x, ",", y, this._circle);
+
+	          break;
+	        }
+	    }
+	  },
+	  result: function result() {
+	    if (this._string.length) {
+	      var result = this._string.join("");
+
+	      this._string = [];
+	      return result;
 	    } else {
-	      c[k] = b[k];
+	      return null;
 	    }
 	  }
+	};
 
-	  return function(t) {
-	    for (k in i) { c[k] = i[k](t); }
-	    return c;
-	  };
+	function circle(radius) {
+	  return "m0," + radius + "a" + radius + "," + radius + " 0 1,1 0," + -2 * radius + "a" + radius + "," + radius + " 0 1,1 0," + 2 * radius + "z";
 	}
 
-	var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g,
-	    reB = new RegExp(reA.source, "g");
+	function d3_geoPath (projection, context) {
+	  var pointRadius = 4.5,
+	      projectionStream,
+	      contextStream;
 
-	function zero(b) {
-	  return function() {
-	    return b;
+	  function path(object) {
+	    if (object) {
+	      if (typeof pointRadius === "function") contextStream.pointRadius(+pointRadius.apply(this, arguments));
+	      d3_geoStream(object, projectionStream(contextStream));
+	    }
+
+	    return contextStream.result();
+	  }
+
+	  path.area = function (object) {
+	    d3_geoStream(object, projectionStream(areaStream));
+	    return areaStream.result();
 	  };
-	}
 
-	function one(b) {
-	  return function(t) {
-	    return b(t) + "";
+	  path.measure = function (object) {
+	    d3_geoStream(object, projectionStream(lengthStream));
+	    return lengthStream.result();
 	  };
-	}
 
-	function interpolateString(a, b) {
-	  var bi = reA.lastIndex = reB.lastIndex = 0, // scan index for next number in b
-	      am, // current match in a
-	      bm, // current match in b
-	      bs, // string preceding current number in b, if any
-	      i = -1, // index in s
-	      s = [], // string constants and placeholders
-	      q = []; // number interpolators
+	  path.bounds = function (object) {
+	    d3_geoStream(object, projectionStream(boundsStream));
+	    return boundsStream.result();
+	  };
 
-	  // Coerce inputs to strings.
-	  a = a + "", b = b + "";
+	  path.centroid = function (object) {
+	    d3_geoStream(object, projectionStream(centroidStream));
+	    return centroidStream.result();
+	  };
 
-	  // Interpolate pairs of numbers in a & b.
-	  while ((am = reA.exec(a))
-	      && (bm = reB.exec(b))) {
-	    if ((bs = bm.index) > bi) { // a string precedes the next number in b
-	      bs = b.slice(bi, bs);
-	      if (s[i]) { s[i] += bs; } // coalesce with previous string
-	      else { s[++i] = bs; }
-	    }
-	    if ((am = am[0]) === (bm = bm[0])) { // numbers in a & b match
-	      if (s[i]) { s[i] += bm; } // coalesce with previous string
-	      else { s[++i] = bm; }
-	    } else { // interpolate non-matching numbers
-	      s[++i] = null;
-	      q.push({i: i, x: d3_interpolateNumber(am, bm)});
-	    }
-	    bi = reB.lastIndex;
-	  }
+	  path.projection = function (_) {
+	    return arguments.length ? (projectionStream = _ == null ? (projection = null, identity$4) : (projection = _).stream, path) : projection;
+	  };
 
-	  // Add remains of b.
-	  if (bi < b.length) {
-	    bs = b.slice(bi);
-	    if (s[i]) { s[i] += bs; } // coalesce with previous string
-	    else { s[++i] = bs; }
-	  }
+	  path.context = function (_) {
+	    if (!arguments.length) return context;
+	    contextStream = _ == null ? (context = null, new PathString()) : new PathContext(context = _);
+	    if (typeof pointRadius !== "function") contextStream.pointRadius(pointRadius);
+	    return path;
+	  };
 
-	  // Special optimization for only a single match.
-	  // Otherwise, interpolate each of the numbers and rejoin the string.
-	  return s.length < 2 ? (q[0]
-	      ? one(q[0].x)
-	      : zero(b))
-	      : (b = q.length, function(t) {
-	          for (var i = 0, o; i < b; ++i) { s[(o = q[i]).i] = o.x(t); }
-	          return s.join("");
-	        });
+	  path.pointRadius = function (_) {
+	    if (!arguments.length) return pointRadius;
+	    pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_);
+	    return path;
+	  };
+
+	  return path.projection(projection).context(context);
 	}
 
-	function interpolate(a, b) {
-	  var t = typeof b, c;
-	  return b == null || t === "boolean" ? constant$2(b)
-	      : (t === "number" ? d3_interpolateNumber
-	      : t === "string" ? ((c = color(b)) ? (b = c, d3_interpolateRgb) : interpolateString)
-	      : b instanceof color ? d3_interpolateRgb
-	      : b instanceof Date ? date
-	      : isNumberArray(b) ? numberArray
-	      : Array.isArray(b) ? genericArray
-	      : typeof b.valueOf !== "function" && typeof b.toString !== "function" || isNaN(b) ? object
-	      : d3_interpolateNumber)(a, b);
+	function d3_geoTransform (methods) {
+	  return {
+	    stream: transformer$1(methods)
+	  };
 	}
+	function transformer$1(methods) {
+	  return function (stream) {
+	    var s = new TransformStream();
 
-	function interpolateRound(a, b) {
-	  return a = +a, b = +b, function(t) {
-	    return Math.round(a * (1 - t) + b * t);
+	    for (var key in methods) {
+	      s[key] = methods[key];
+	    }
+
+	    s.stream = stream;
+	    return s;
 	  };
 	}
 
-	var degrees$1 = 180 / Math.PI;
+	function TransformStream() {}
 
-	var identity$1 = {
-	  translateX: 0,
-	  translateY: 0,
-	  rotate: 0,
-	  skewX: 0,
-	  scaleX: 1,
-	  scaleY: 1
+	TransformStream.prototype = {
+	  constructor: TransformStream,
+	  point: function point(x, y) {
+	    this.stream.point(x, y);
+	  },
+	  sphere: function sphere() {
+	    this.stream.sphere();
+	  },
+	  lineStart: function lineStart() {
+	    this.stream.lineStart();
+	  },
+	  lineEnd: function lineEnd() {
+	    this.stream.lineEnd();
+	  },
+	  polygonStart: function polygonStart() {
+	    this.stream.polygonStart();
+	  },
+	  polygonEnd: function polygonEnd() {
+	    this.stream.polygonEnd();
+	  }
 	};
 
-	function decompose(a, b, c, d, e, f) {
-	  var scaleX, scaleY, skewX;
-	  if (scaleX = Math.sqrt(a * a + b * b)) { a /= scaleX, b /= scaleX; }
-	  if (skewX = a * c + b * d) { c -= a * skewX, d -= b * skewX; }
-	  if (scaleY = Math.sqrt(c * c + d * d)) { c /= scaleY, d /= scaleY, skewX /= scaleY; }
-	  if (a * d < b * c) { a = -a, b = -b, skewX = -skewX, scaleX = -scaleX; }
-	  return {
-	    translateX: e,
-	    translateY: f,
-	    rotate: Math.atan2(b, a) * degrees$1,
-	    skewX: Math.atan(skewX) * degrees$1,
-	    scaleX: scaleX,
-	    scaleY: scaleY
-	  };
+	function fit(projection, fitBounds, object) {
+	  var clip = projection.clipExtent && projection.clipExtent();
+	  projection.scale(150).translate([0, 0]);
+	  if (clip != null) projection.clipExtent(null);
+	  d3_geoStream(object, projection.stream(boundsStream));
+	  fitBounds(boundsStream.result());
+	  if (clip != null) projection.clipExtent(clip);
+	  return projection;
+	}
+
+	function fitExtent(projection, extent, object) {
+	  return fit(projection, function (b) {
+	    var w = extent[1][0] - extent[0][0],
+	        h = extent[1][1] - extent[0][1],
+	        k = Math.min(w / (b[1][0] - b[0][0]), h / (b[1][1] - b[0][1])),
+	        x = +extent[0][0] + (w - k * (b[1][0] + b[0][0])) / 2,
+	        y = +extent[0][1] + (h - k * (b[1][1] + b[0][1])) / 2;
+	    projection.scale(150 * k).translate([x, y]);
+	  }, object);
+	}
+	function fitSize(projection, size, object) {
+	  return fitExtent(projection, [[0, 0], size], object);
+	}
+	function fitWidth(projection, width, object) {
+	  return fit(projection, function (b) {
+	    var w = +width,
+	        k = w / (b[1][0] - b[0][0]),
+	        x = (w - k * (b[1][0] + b[0][0])) / 2,
+	        y = -k * b[0][1];
+	    projection.scale(150 * k).translate([x, y]);
+	  }, object);
+	}
+	function fitHeight(projection, height, object) {
+	  return fit(projection, function (b) {
+	    var h = +height,
+	        k = h / (b[1][1] - b[0][1]),
+	        x = -k * b[0][0],
+	        y = (h - k * (b[1][1] + b[0][1])) / 2;
+	    projection.scale(150 * k).translate([x, y]);
+	  }, object);
 	}
 
-	var cssNode,
-	    cssRoot,
-	    cssView,
-	    svgNode;
+	var maxDepth = 16,
+	    // maximum depth of subdivision
+	cosMinDistance = cos(30 * radians); // cos(minimum angular distance)
 
-	function parseCss(value) {
-	  if (value === "none") { return identity$1; }
-	  if (!cssNode) { cssNode = document.createElement("DIV"), cssRoot = document.documentElement, cssView = document.defaultView; }
-	  cssNode.style.transform = value;
-	  value = cssView.getComputedStyle(cssRoot.appendChild(cssNode), null).getPropertyValue("transform");
-	  cssRoot.removeChild(cssNode);
-	  value = value.slice(7, -1).split(",");
-	  return decompose(+value[0], +value[1], +value[2], +value[3], +value[4], +value[5]);
+	function resample (project, delta2) {
+	  return +delta2 ? resample$1(project, delta2) : resampleNone(project);
 	}
 
-	function parseSvg(value) {
-	  if (value == null) { return identity$1; }
-	  if (!svgNode) { svgNode = document.createElementNS("http://www.w3.org/2000/svg", "g"); }
-	  svgNode.setAttribute("transform", value);
-	  if (!(value = svgNode.transform.baseVal.consolidate())) { return identity$1; }
-	  value = value.matrix;
-	  return decompose(value.a, value.b, value.c, value.d, value.e, value.f);
+	function resampleNone(project) {
+	  return transformer$1({
+	    point: function point(x, y) {
+	      x = project(x, y);
+	      this.stream.point(x[0], x[1]);
+	    }
+	  });
 	}
 
-	function interpolateTransform(parse, pxComma, pxParen, degParen) {
+	function resample$1(project, delta2) {
+	  function resampleLineTo(x0, y0, lambda0, a0, b0, c0, x1, y1, lambda1, a1, b1, c1, depth, stream) {
+	    var dx = x1 - x0,
+	        dy = y1 - y0,
+	        d2 = dx * dx + dy * dy;
 
-	  function pop(s) {
-	    return s.length ? s.pop() + " " : "";
-	  }
+	    if (d2 > 4 * delta2 && depth--) {
+	      var a = a0 + a1,
+	          b = b0 + b1,
+	          c = c0 + c1,
+	          m = sqrt(a * a + b * b + c * c),
+	          phi2 = asin(c /= m),
+	          lambda2 = abs$2(abs$2(c) - 1) < epsilon$1 || abs$2(lambda0 - lambda1) < epsilon$1 ? (lambda0 + lambda1) / 2 : atan2(b, a),
+	          p = project(lambda2, phi2),
+	          x2 = p[0],
+	          y2 = p[1],
+	          dx2 = x2 - x0,
+	          dy2 = y2 - y0,
+	          dz = dy * dx2 - dx * dy2;
 
-	  function translate(xa, ya, xb, yb, s, q) {
-	    if (xa !== xb || ya !== yb) {
-	      var i = s.push("translate(", null, pxComma, null, pxParen);
-	      q.push({i: i - 4, x: d3_interpolateNumber(xa, xb)}, {i: i - 2, x: d3_interpolateNumber(ya, yb)});
-	    } else if (xb || yb) {
-	      s.push("translate(" + xb + pxComma + yb + pxParen);
+	      if (dz * dz / d2 > delta2 // perpendicular projected distance
+	      || abs$2((dx * dx2 + dy * dy2) / d2 - 0.5) > 0.3 // midpoint close to an end
+	      || a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) {
+	        // angular distance
+	        resampleLineTo(x0, y0, lambda0, a0, b0, c0, x2, y2, lambda2, a /= m, b /= m, c, depth, stream);
+	        stream.point(x2, y2);
+	        resampleLineTo(x2, y2, lambda2, a, b, c, x1, y1, lambda1, a1, b1, c1, depth, stream);
+	      }
 	    }
 	  }
 
-	  function rotate(a, b, s, q) {
-	    if (a !== b) {
-	      if (a - b > 180) { b += 360; } else if (b - a > 180) { a += 360; } // shortest path
-	      q.push({i: s.push(pop(s) + "rotate(", null, degParen) - 2, x: d3_interpolateNumber(a, b)});
-	    } else if (b) {
-	      s.push(pop(s) + "rotate(" + b + degParen);
+	  return function (stream) {
+	    var lambda00, x00, y00, a00, b00, c00, // first point
+	    lambda0, x0, y0, a0, b0, c0; // previous point
+
+	    var resampleStream = {
+	      point: point,
+	      lineStart: lineStart,
+	      lineEnd: lineEnd,
+	      polygonStart: function polygonStart() {
+	        stream.polygonStart();
+	        resampleStream.lineStart = ringStart;
+	      },
+	      polygonEnd: function polygonEnd() {
+	        stream.polygonEnd();
+	        resampleStream.lineStart = lineStart;
+	      }
+	    };
+
+	    function point(x, y) {
+	      x = project(x, y);
+	      stream.point(x[0], x[1]);
 	    }
-	  }
 
-	  function skewX(a, b, s, q) {
-	    if (a !== b) {
-	      q.push({i: s.push(pop(s) + "skewX(", null, degParen) - 2, x: d3_interpolateNumber(a, b)});
-	    } else if (b) {
-	      s.push(pop(s) + "skewX(" + b + degParen);
+	    function lineStart() {
+	      x0 = NaN;
+	      resampleStream.point = linePoint;
+	      stream.lineStart();
 	    }
-	  }
 
-	  function scale(xa, ya, xb, yb, s, q) {
-	    if (xa !== xb || ya !== yb) {
-	      var i = s.push(pop(s) + "scale(", null, ",", null, ")");
-	      q.push({i: i - 4, x: d3_interpolateNumber(xa, xb)}, {i: i - 2, x: d3_interpolateNumber(ya, yb)});
-	    } else if (xb !== 1 || yb !== 1) {
-	      s.push(pop(s) + "scale(" + xb + "," + yb + ")");
+	    function linePoint(lambda, phi) {
+	      var c = cartesian([lambda, phi]),
+	          p = project(lambda, phi);
+	      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x0 = p[0], y0 = p[1], lambda0 = lambda, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream);
+	      stream.point(x0, y0);
 	    }
-	  }
 
-	  return function(a, b) {
-	    var s = [], // string constants and placeholders
-	        q = []; // number interpolators
-	    a = parse(a), b = parse(b);
-	    translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);
-	    rotate(a.rotate, b.rotate, s, q);
-	    skewX(a.skewX, b.skewX, s, q);
-	    scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);
-	    a = b = null; // gc
-	    return function(t) {
-	      var i = -1, n = q.length, o;
-	      while (++i < n) { s[(o = q[i]).i] = o.x(t); }
-	      return s.join("");
-	    };
-	  };
-	}
+	    function lineEnd() {
+	      resampleStream.point = point;
+	      stream.lineEnd();
+	    }
 
-	var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)");
-	var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")");
+	    function ringStart() {
+	      lineStart();
+	      resampleStream.point = ringPoint;
+	      resampleStream.lineEnd = ringEnd;
+	    }
 
-	var rho = Math.SQRT2,
-	    rho2 = 2,
-	    rho4 = 4,
-	    epsilon2$1 = 1e-12;
+	    function ringPoint(lambda, phi) {
+	      linePoint(lambda00 = lambda, phi), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;
+	      resampleStream.point = linePoint;
+	    }
 
-	function cosh(x) {
-	  return ((x = Math.exp(x)) + 1 / x) / 2;
-	}
+	    function ringEnd() {
+	      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x00, y00, lambda00, a00, b00, c00, maxDepth, stream);
+	      resampleStream.lineEnd = lineEnd;
+	      lineEnd();
+	    }
 
-	function sinh(x) {
-	  return ((x = Math.exp(x)) - 1 / x) / 2;
+	    return resampleStream;
+	  };
 	}
 
-	function tanh(x) {
-	  return ((x = Math.exp(2 * x)) - 1) / (x + 1);
+	var transformRadians = transformer$1({
+	  point: function point(x, y) {
+	    this.stream.point(x * radians, y * radians);
+	  }
+	});
+
+	function transformRotate(rotate) {
+	  return transformer$1({
+	    point: function point(x, y) {
+	      var r = rotate(x, y);
+	      return this.stream.point(r[0], r[1]);
+	    }
+	  });
 	}
 
-	// p0 = [ux0, uy0, w0]
-	// p1 = [ux1, uy1, w1]
-	function interpolateZoom(p0, p1) {
-	  var ux0 = p0[0], uy0 = p0[1], w0 = p0[2],
-	      ux1 = p1[0], uy1 = p1[1], w1 = p1[2],
-	      dx = ux1 - ux0,
-	      dy = uy1 - uy0,
-	      d2 = dx * dx + dy * dy,
-	      i,
-	      S;
-
-	  // Special case for u0 ≅ u1.
-	  if (d2 < epsilon2$1) {
-	    S = Math.log(w1 / w0) / rho;
-	    i = function(t) {
-	      return [
-	        ux0 + t * dx,
-	        uy0 + t * dy,
-	        w0 * Math.exp(rho * t * S)
-	      ];
-	    };
+	function scaleTranslate(k, dx, dy, sx, sy) {
+	  function transform(x, y) {
+	    x *= sx;
+	    y *= sy;
+	    return [dx + k * x, dy - k * y];
 	  }
 
-	  // General case.
-	  else {
-	    var d1 = Math.sqrt(d2),
-	        b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),
-	        b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),
-	        r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),
-	        r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);
-	    S = (r1 - r0) / rho;
-	    i = function(t) {
-	      var s = t * S,
-	          coshr0 = cosh(r0),
-	          u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));
-	      return [
-	        ux0 + u * dx,
-	        uy0 + u * dy,
-	        w0 * coshr0 / cosh(rho * s + r0)
-	      ];
-	    };
+	  transform.invert = function (x, y) {
+	    return [(x - dx) / k * sx, (dy - y) / k * sy];
+	  };
+
+	  return transform;
+	}
+
+	function scaleTranslateRotate(k, dx, dy, sx, sy, alpha) {
+	  if (!alpha) return scaleTranslate(k, dx, dy, sx, sy);
+	  var cosAlpha = cos(alpha),
+	      sinAlpha = sin(alpha),
+	      a = cosAlpha * k,
+	      b = sinAlpha * k,
+	      ai = cosAlpha / k,
+	      bi = sinAlpha / k,
+	      ci = (sinAlpha * dy - cosAlpha * dx) / k,
+	      fi = (sinAlpha * dx + cosAlpha * dy) / k;
+
+	  function transform(x, y) {
+	    x *= sx;
+	    y *= sy;
+	    return [a * x - b * y + dx, dy - b * x - a * y];
 	  }
 
-	  i.duration = S * 1000;
+	  transform.invert = function (x, y) {
+	    return [sx * (ai * x - bi * y + ci), sy * (fi - bi * x - ai * y)];
+	  };
 
-	  return i;
+	  return transform;
 	}
 
-	function d3_quantize(interpolator, n) {
-	  var samples = new Array(n);
-	  for (var i = 0; i < n; ++i) { samples[i] = interpolator(i / (n - 1)); }
-	  return samples;
-	}
-
-	var frame = 0, // is an animation frame pending?
-	    timeout = 0, // is a timeout pending?
-	    interval = 0, // are any timers active?
-	    pokeDelay = 1000, // how frequently we check for clock skew
-	    taskHead,
-	    taskTail,
-	    clockLast = 0,
-	    clockNow = 0,
-	    clockSkew = 0,
-	    clock = typeof performance === "object" && performance.now ? performance : Date,
-	    setFrame = typeof window === "object" && window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) : function(f) { setTimeout(f, 17); };
-
-	function now() {
-	  return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);
-	}
-
-	function clearNow() {
-	  clockNow = 0;
-	}
-
-	function Timer() {
-	  this._call =
-	  this._time =
-	  this._next = null;
-	}
-
-	Timer.prototype = timer.prototype = {
-	  constructor: Timer,
-	  restart: function(callback, delay, time) {
-	    if (typeof callback !== "function") { throw new TypeError("callback is not a function"); }
-	    time = (time == null ? now() : +time) + (delay == null ? 0 : +delay);
-	    if (!this._next && taskTail !== this) {
-	      if (taskTail) { taskTail._next = this; }
-	      else { taskHead = this; }
-	      taskTail = this;
-	    }
-	    this._call = callback;
-	    this._time = time;
-	    sleep();
-	  },
-	  stop: function() {
-	    if (this._call) {
-	      this._call = null;
-	      this._time = Infinity;
-	      sleep();
-	    }
-	  }
-	};
-
-	function timer(callback, delay, time) {
-	  var t = new Timer;
-	  t.restart(callback, delay, time);
-	  return t;
-	}
-
-	function timerFlush() {
-	  now(); // Get the current time, if not already set.
-	  ++frame; // Pretend we’ve set an alarm, if we haven’t already.
-	  var t = taskHead, e;
-	  while (t) {
-	    if ((e = clockNow - t._time) >= 0) { t._call.call(null, e); }
-	    t = t._next;
-	  }
-	  --frame;
-	}
-
-	function wake() {
-	  clockNow = (clockLast = clock.now()) + clockSkew;
-	  frame = timeout = 0;
-	  try {
-	    timerFlush();
-	  } finally {
-	    frame = 0;
-	    nap();
-	    clockNow = 0;
-	  }
-	}
-
-	function poke() {
-	  var now = clock.now(), delay = now - clockLast;
-	  if (delay > pokeDelay) { clockSkew -= delay, clockLast = now; }
+	function projection(project) {
+	  return projectionMutator(function () {
+	    return project;
+	  })();
 	}
+	function projectionMutator(projectAt) {
+	  var project,
+	      k = 150,
+	      // scale
+	  x = 480,
+	      y = 250,
+	      // translate
+	  lambda = 0,
+	      phi = 0,
+	      // center
+	  deltaLambda = 0,
+	      deltaPhi = 0,
+	      deltaGamma = 0,
+	      rotate,
+	      // pre-rotate
+	  alpha = 0,
+	      // post-rotate angle
+	  sx = 1,
+	      // reflectX
+	  sy = 1,
+	      // reflectX
+	  theta = null,
+	      preclip = clipAntimeridian,
+	      // pre-clip angle
+	  x0 = null,
+	      y0,
+	      x1,
+	      y1,
+	      postclip = identity$4,
+	      // post-clip extent
+	  delta2 = 0.5,
+	      // precision
+	  projectResample,
+	      projectTransform,
+	      projectRotateTransform,
+	      cache,
+	      cacheStream;
 
-	function nap() {
-	  var t0, t1 = taskHead, t2, time = Infinity;
-	  while (t1) {
-	    if (t1._call) {
-	      if (time > t1._time) { time = t1._time; }
-	      t0 = t1, t1 = t1._next;
-	    } else {
-	      t2 = t1._next, t1._next = null;
-	      t1 = t0 ? t0._next = t2 : taskHead = t2;
-	    }
+	  function projection(point) {
+	    return projectRotateTransform(point[0] * radians, point[1] * radians);
 	  }
-	  taskTail = t0;
-	  sleep(time);
-	}
 
-	function sleep(time) {
-	  if (frame) { return; } // Soonest alarm already set, or will be.
-	  if (timeout) { timeout = clearTimeout(timeout); }
-	  var delay = time - clockNow; // Strictly less than if we recomputed clockNow.
-	  if (delay > 24) {
-	    if (time < Infinity) { timeout = setTimeout(wake, time - clock.now() - clockSkew); }
-	    if (interval) { interval = clearInterval(interval); }
-	  } else {
-	    if (!interval) { clockLast = clock.now(), interval = setInterval(poke, pokeDelay); }
-	    frame = 1, setFrame(wake);
+	  function invert(point) {
+	    point = projectRotateTransform.invert(point[0], point[1]);
+	    return point && [point[0] * degrees$1, point[1] * degrees$1];
 	  }
-	}
-
-	function d3_timeout(callback, delay, time) {
-	  var t = new Timer;
-	  delay = delay == null ? 0 : +delay;
-	  t.restart(function(elapsed) {
-	    t.stop();
-	    callback(elapsed + delay);
-	  }, delay, time);
-	  return t;
-	}
-
-	var emptyOn = dispatch("start", "end", "cancel", "interrupt");
-	var emptyTween = [];
 
-	var CREATED = 0;
-	var SCHEDULED = 1;
-	var STARTING = 2;
-	var STARTED = 3;
-	var RUNNING = 4;
-	var ENDING = 5;
-	var ENDED = 6;
+	  projection.stream = function (stream) {
+	    return cache && cacheStream === stream ? cache : cache = transformRadians(transformRotate(rotate)(preclip(projectResample(postclip(cacheStream = stream)))));
+	  };
 
-	function schedule(node, name, id, index, group, timing) {
-	  var schedules = node.__transition;
-	  if (!schedules) { node.__transition = {}; }
-	  else if (id in schedules) { return; }
-	  create$7(node, id, {
-	    name: name,
-	    index: index, // For context during callback.
-	    group: group, // For context during callback.
-	    on: emptyOn,
-	    tween: emptyTween,
-	    time: timing.time,
-	    delay: timing.delay,
-	    duration: timing.duration,
-	    ease: timing.ease,
-	    timer: null,
-	    state: CREATED
-	  });
-	}
+	  projection.preclip = function (_) {
+	    return arguments.length ? (preclip = _, theta = undefined, reset()) : preclip;
+	  };
 
-	function init(node, id) {
-	  var schedule = get$2(node, id);
-	  if (schedule.state > CREATED) { throw new Error("too late; already scheduled"); }
-	  return schedule;
-	}
+	  projection.postclip = function (_) {
+	    return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
+	  };
 
-	function set$1(node, id) {
-	  var schedule = get$2(node, id);
-	  if (schedule.state > STARTED) { throw new Error("too late; already running"); }
-	  return schedule;
-	}
+	  projection.clipAngle = function (_) {
+	    return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees$1;
+	  };
 
-	function get$2(node, id) {
-	  var schedule = node.__transition;
-	  if (!schedule || !(schedule = schedule[id])) { throw new Error("transition not found"); }
-	  return schedule;
-	}
+	  projection.clipExtent = function (_) {
+	    return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
+	  };
 
-	function create$7(node, id, self) {
-	  var schedules = node.__transition,
-	      tween;
+	  projection.scale = function (_) {
+	    return arguments.length ? (k = +_, recenter()) : k;
+	  };
 
-	  // Initialize the self timer when the transition is created.
-	  // Note the actual delay is not known until the first callback!
-	  schedules[id] = self;
-	  self.timer = timer(schedule, 0, self.time);
+	  projection.translate = function (_) {
+	    return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y];
+	  };
 
-	  function schedule(elapsed) {
-	    self.state = SCHEDULED;
-	    self.timer.restart(start, self.delay, self.time);
+	  projection.center = function (_) {
+	    return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees$1, phi * degrees$1];
+	  };
 
-	    // If the elapsed delay is less than our first sleep, start immediately.
-	    if (self.delay <= elapsed) { start(elapsed - self.delay); }
-	  }
+	  projection.rotate = function (_) {
+	    return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees$1, deltaPhi * degrees$1, deltaGamma * degrees$1];
+	  };
 
-	  function start(elapsed) {
-	    var i, j, n, o;
+	  projection.angle = function (_) {
+	    return arguments.length ? (alpha = _ % 360 * radians, recenter()) : alpha * degrees$1;
+	  };
 
-	    // If the state is not SCHEDULED, then we previously errored on start.
-	    if (self.state !== SCHEDULED) { return stop(); }
+	  projection.reflectX = function (_) {
+	    return arguments.length ? (sx = _ ? -1 : 1, recenter()) : sx < 0;
+	  };
 
-	    for (i in schedules) {
-	      o = schedules[i];
-	      if (o.name !== self.name) { continue; }
+	  projection.reflectY = function (_) {
+	    return arguments.length ? (sy = _ ? -1 : 1, recenter()) : sy < 0;
+	  };
 
-	      // While this element already has a starting transition during this frame,
-	      // defer starting an interrupting transition until that transition has a
-	      // chance to tick (and possibly end); see d3/d3-transition#54!
-	      if (o.state === STARTED) { return d3_timeout(start); }
+	  projection.precision = function (_) {
+	    return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt(delta2);
+	  };
 
-	      // Interrupt the active transition, if any.
-	      if (o.state === RUNNING) {
-	        o.state = ENDED;
-	        o.timer.stop();
-	        o.on.call("interrupt", node, node.__data__, o.index, o.group);
-	        delete schedules[i];
-	      }
+	  projection.fitExtent = function (extent, object) {
+	    return fitExtent(projection, extent, object);
+	  };
 
-	      // Cancel any pre-empted transitions.
-	      else if (+i < id) {
-	        o.state = ENDED;
-	        o.timer.stop();
-	        o.on.call("cancel", node, node.__data__, o.index, o.group);
-	        delete schedules[i];
-	      }
-	    }
+	  projection.fitSize = function (size, object) {
+	    return fitSize(projection, size, object);
+	  };
 
-	    // Defer the first tick to end of the current frame; see d3/d3#1576.
-	    // Note the transition may be canceled after start and before the first tick!
-	    // Note this must be scheduled before the start event; see d3/d3-transition#16!
-	    // Assuming this is successful, subsequent callbacks go straight to tick.
-	    d3_timeout(function() {
-	      if (self.state === STARTED) {
-	        self.state = RUNNING;
-	        self.timer.restart(tick, self.delay, self.time);
-	        tick(elapsed);
-	      }
-	    });
+	  projection.fitWidth = function (width, object) {
+	    return fitWidth(projection, width, object);
+	  };
 
-	    // Dispatch the start event.
-	    // Note this must be done before the tween are initialized.
-	    self.state = STARTING;
-	    self.on.call("start", node, node.__data__, self.index, self.group);
-	    if (self.state !== STARTING) { return; } // interrupted
-	    self.state = STARTED;
+	  projection.fitHeight = function (height, object) {
+	    return fitHeight(projection, height, object);
+	  };
 
-	    // Initialize the tween, deleting null tween.
-	    tween = new Array(n = self.tween.length);
-	    for (i = 0, j = -1; i < n; ++i) {
-	      if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) {
-	        tween[++j] = o;
-	      }
-	    }
-	    tween.length = j + 1;
+	  function recenter() {
+	    var center = scaleTranslateRotate(k, 0, 0, sx, sy, alpha).apply(null, project(lambda, phi)),
+	        transform = scaleTranslateRotate(k, x - center[0], y - center[1], sx, sy, alpha);
+	    rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma);
+	    projectTransform = compose(project, transform);
+	    projectRotateTransform = compose(rotate, projectTransform);
+	    projectResample = resample(projectTransform, delta2);
+	    return reset();
 	  }
 
-	  function tick(elapsed) {
-	    var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1),
-	        i = -1,
-	        n = tween.length;
-
-	    while (++i < n) {
-	      tween[i].call(node, t);
-	    }
-
-	    // Dispatch the end event.
-	    if (self.state === ENDING) {
-	      self.on.call("end", node, node.__data__, self.index, self.group);
-	      stop();
-	    }
+	  function reset() {
+	    cache = cacheStream = null;
+	    return projection;
 	  }
 
-	  function stop() {
-	    self.state = ENDED;
-	    self.timer.stop();
-	    delete schedules[id];
-	    for (var i in schedules) { return; } // eslint-disable-line no-unused-vars
-	    delete node.__transition;
-	  }
+	  return function () {
+	    project = projectAt.apply(this, arguments);
+	    projection.invert = project.invert && invert;
+	    return recenter();
+	  };
 	}
 
-	function interrupt(node, name) {
-	  var schedules = node.__transition,
-	      schedule,
-	      active,
-	      empty = true,
-	      i;
-
-	  if (!schedules) { return; }
-
-	  name = name == null ? null : name + "";
-
-	  for (i in schedules) {
-	    if ((schedule = schedules[i]).name !== name) { empty = false; continue; }
-	    active = schedule.state > STARTING && schedule.state < ENDING;
-	    schedule.state = ENDED;
-	    schedule.timer.stop();
-	    schedule.on.call(active ? "interrupt" : "cancel", node, node.__data__, schedule.index, schedule.group);
-	    delete schedules[i];
-	  }
-
-	  if (empty) { delete node.__transition; }
+	function mercatorRaw(lambda, phi) {
+	  return [lambda, log$1(tan((halfPi + phi) / 2))];
 	}
 
-	function selection_interrupt(name) {
-	  return this.each(function() {
-	    interrupt(this, name);
-	  });
+	mercatorRaw.invert = function (x, y) {
+	  return [x, 2 * atan(exp$2(y)) - halfPi];
+	};
+
+	function mercator () {
+	  return mercatorProjection(mercatorRaw).scale(961 / tau);
 	}
+	function mercatorProjection(project) {
+	  var m = projection(project),
+	      center = m.center,
+	      scale = m.scale,
+	      translate = m.translate,
+	      clipExtent = m.clipExtent,
+	      x0 = null,
+	      y0,
+	      x1,
+	      y1; // clip extent
 
-	function tweenRemove(id, name) {
-	  var tween0, tween1;
-	  return function() {
-	    var schedule = set$1(this, id),
-	        tween = schedule.tween;
+	  m.scale = function (_) {
+	    return arguments.length ? (scale(_), reclip()) : scale();
+	  };
 
-	    // If this node shared tween with the previous node,
-	    // just assign the updated shared tween and we’re done!
-	    // Otherwise, copy-on-write.
-	    if (tween !== tween0) {
-	      tween1 = tween0 = tween;
-	      for (var i = 0, n = tween1.length; i < n; ++i) {
-	        if (tween1[i].name === name) {
-	          tween1 = tween1.slice();
-	          tween1.splice(i, 1);
-	          break;
-	        }
-	      }
-	    }
+	  m.translate = function (_) {
+	    return arguments.length ? (translate(_), reclip()) : translate();
+	  };
 
-	    schedule.tween = tween1;
+	  m.center = function (_) {
+	    return arguments.length ? (center(_), reclip()) : center();
 	  };
-	}
 
-	function tweenFunction(id, name, value) {
-	  var tween0, tween1;
-	  if (typeof value !== "function") { throw new Error; }
-	  return function() {
-	    var schedule = set$1(this, id),
-	        tween = schedule.tween;
+	  m.clipExtent = function (_) {
+	    return arguments.length ? (_ == null ? x0 = y0 = x1 = y1 = null : (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reclip()) : x0 == null ? null : [[x0, y0], [x1, y1]];
+	  };
 
-	    // If this node shared tween with the previous node,
-	    // just assign the updated shared tween and we’re done!
-	    // Otherwise, copy-on-write.
-	    if (tween !== tween0) {
-	      tween1 = (tween0 = tween).slice();
-	      for (var t = {name: name, value: value}, i = 0, n = tween1.length; i < n; ++i) {
-	        if (tween1[i].name === name) {
-	          tween1[i] = t;
-	          break;
-	        }
-	      }
-	      if (i === n) { tween1.push(t); }
-	    }
+	  function reclip() {
+	    var k = pi * scale(),
+	        t = m(rotation(m.rotate()).invert([0, 0]));
+	    return clipExtent(x0 == null ? [[t[0] - k, t[1] - k], [t[0] + k, t[1] + k]] : project === mercatorRaw ? [[Math.max(t[0] - k, x0), y0], [Math.min(t[0] + k, x1), y1]] : [[x0, Math.max(t[1] - k, y0)], [x1, Math.min(t[1] + k, y1)]]);
+	  }
 
-	    schedule.tween = tween1;
-	  };
+	  return reclip();
 	}
 
-	function transition_tween(name, value) {
-	  var id = this._id;
+	function d3_geoIdentity () {
+	  var k = 1,
+	      tx = 0,
+	      ty = 0,
+	      sx = 1,
+	      sy = 1,
+	      // scale, translate and reflect
+	  alpha = 0,
+	      ca,
+	      sa,
+	      // angle
+	  x0 = null,
+	      y0,
+	      x1,
+	      y1,
+	      // clip extent
+	  kx = 1,
+	      ky = 1,
+	      transform = transformer$1({
+	    point: function point(x, y) {
+	      var p = projection([x, y]);
+	      this.stream.point(p[0], p[1]);
+	    }
+	  }),
+	      postclip = identity$4,
+	      cache,
+	      cacheStream;
 
-	  name += "";
+	  function reset() {
+	    kx = k * sx;
+	    ky = k * sy;
+	    cache = cacheStream = null;
+	    return projection;
+	  }
 
-	  if (arguments.length < 2) {
-	    var tween = get$2(this.node(), id).tween;
-	    for (var i = 0, n = tween.length, t; i < n; ++i) {
-	      if ((t = tween[i]).name === name) {
-	        return t.value;
-	      }
+	  function projection(p) {
+	    var x = p[0] * kx,
+	        y = p[1] * ky;
+
+	    if (alpha) {
+	      var t = y * ca - x * sa;
+	      x = x * ca + y * sa;
+	      y = t;
 	    }
-	    return null;
-	  }
 
-	  return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));
-	}
+	    return [x + tx, y + ty];
+	  }
 
-	function tweenValue(transition, name, value) {
-	  var id = transition._id;
+	  projection.invert = function (p) {
+	    var x = p[0] - tx,
+	        y = p[1] - ty;
 
-	  transition.each(function() {
-	    var schedule = set$1(this, id);
-	    (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);
-	  });
+	    if (alpha) {
+	      var t = y * ca + x * sa;
+	      x = x * ca - y * sa;
+	      y = t;
+	    }
 
-	  return function(node) {
-	    return get$2(node, id).value[name];
+	    return [x / kx, y / ky];
 	  };
-	}
 
-	function interpolate$1(a, b) {
-	  var c;
-	  return (typeof b === "number" ? d3_interpolateNumber
-	      : b instanceof color ? d3_interpolateRgb
-	      : (c = color(b)) ? (b = c, d3_interpolateRgb)
-	      : interpolateString)(a, b);
-	}
+	  projection.stream = function (stream) {
+	    return cache && cacheStream === stream ? cache : cache = transform(postclip(cacheStream = stream));
+	  };
 
-	function attrRemove$1(name) {
-	  return function() {
-	    this.removeAttribute(name);
+	  projection.postclip = function (_) {
+	    return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
 	  };
-	}
 
-	function attrRemoveNS$1(fullname) {
-	  return function() {
-	    this.removeAttributeNS(fullname.space, fullname.local);
+	  projection.clipExtent = function (_) {
+	    return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
 	  };
-	}
 
-	function attrConstant$1(name, interpolate, value1) {
-	  var string00,
-	      string1 = value1 + "",
-	      interpolate0;
-	  return function() {
-	    var string0 = this.getAttribute(name);
-	    return string0 === string1 ? null
-	        : string0 === string00 ? interpolate0
-	        : interpolate0 = interpolate(string00 = string0, value1);
+	  projection.scale = function (_) {
+	    return arguments.length ? (k = +_, reset()) : k;
 	  };
-	}
 
-	function attrConstantNS$1(fullname, interpolate, value1) {
-	  var string00,
-	      string1 = value1 + "",
-	      interpolate0;
-	  return function() {
-	    var string0 = this.getAttributeNS(fullname.space, fullname.local);
-	    return string0 === string1 ? null
-	        : string0 === string00 ? interpolate0
-	        : interpolate0 = interpolate(string00 = string0, value1);
+	  projection.translate = function (_) {
+	    return arguments.length ? (tx = +_[0], ty = +_[1], reset()) : [tx, ty];
 	  };
-	}
 
-	function attrFunction$1(name, interpolate, value) {
-	  var string00,
-	      string10,
-	      interpolate0;
-	  return function() {
-	    var string0, value1 = value(this), string1;
-	    if (value1 == null) { return void this.removeAttribute(name); }
-	    string0 = this.getAttribute(name);
-	    string1 = value1 + "";
-	    return string0 === string1 ? null
-	        : string0 === string00 && string1 === string10 ? interpolate0
-	        : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
+	  projection.angle = function (_) {
+	    return arguments.length ? (alpha = _ % 360 * radians, sa = sin(alpha), ca = cos(alpha), reset()) : alpha * degrees$1;
 	  };
-	}
 
-	function attrFunctionNS$1(fullname, interpolate, value) {
-	  var string00,
-	      string10,
-	      interpolate0;
-	  return function() {
-	    var string0, value1 = value(this), string1;
-	    if (value1 == null) { return void this.removeAttributeNS(fullname.space, fullname.local); }
-	    string0 = this.getAttributeNS(fullname.space, fullname.local);
-	    string1 = value1 + "";
-	    return string0 === string1 ? null
-	        : string0 === string00 && string1 === string10 ? interpolate0
-	        : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
+	  projection.reflectX = function (_) {
+	    return arguments.length ? (sx = _ ? -1 : 1, reset()) : sx < 0;
 	  };
-	}
 
-	function transition_attr(name, value) {
-	  var fullname = namespace(name), i = fullname === "transform" ? interpolateTransformSvg : interpolate$1;
-	  return this.attrTween(name, typeof value === "function"
-	      ? (fullname.local ? attrFunctionNS$1 : attrFunction$1)(fullname, i, tweenValue(this, "attr." + name, value))
-	      : value == null ? (fullname.local ? attrRemoveNS$1 : attrRemove$1)(fullname)
-	      : (fullname.local ? attrConstantNS$1 : attrConstant$1)(fullname, i, value));
-	}
+	  projection.reflectY = function (_) {
+	    return arguments.length ? (sy = _ ? -1 : 1, reset()) : sy < 0;
+	  };
 
-	function attrInterpolate(name, i) {
-	  return function(t) {
-	    this.setAttribute(name, i.call(this, t));
+	  projection.fitExtent = function (extent, object) {
+	    return fitExtent(projection, extent, object);
 	  };
-	}
 
-	function attrInterpolateNS(fullname, i) {
-	  return function(t) {
-	    this.setAttributeNS(fullname.space, fullname.local, i.call(this, t));
+	  projection.fitSize = function (size, object) {
+	    return fitSize(projection, size, object);
 	  };
-	}
 
-	function attrTweenNS(fullname, value) {
-	  var t0, i0;
-	  function tween() {
-	    var i = value.apply(this, arguments);
-	    if (i !== i0) { t0 = (i0 = i) && attrInterpolateNS(fullname, i); }
-	    return t0;
-	  }
-	  tween._value = value;
-	  return tween;
-	}
+	  projection.fitWidth = function (width, object) {
+	    return fitWidth(projection, width, object);
+	  };
 
-	function attrTween(name, value) {
-	  var t0, i0;
-	  function tween() {
-	    var i = value.apply(this, arguments);
-	    if (i !== i0) { t0 = (i0 = i) && attrInterpolate(name, i); }
-	    return t0;
-	  }
-	  tween._value = value;
-	  return tween;
-	}
+	  projection.fitHeight = function (height, object) {
+	    return fitHeight(projection, height, object);
+	  };
 
-	function transition_attrTween(name, value) {
-	  var key = "attr." + name;
-	  if (arguments.length < 2) { return (key = this.tween(key)) && key._value; }
-	  if (value == null) { return this.tween(key, null); }
-	  if (typeof value !== "function") { throw new Error; }
-	  var fullname = namespace(name);
-	  return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value));
+	  return projection;
 	}
 
-	function delayFunction(id, value) {
-	  return function() {
-	    init(this, id).delay = +value.apply(this, arguments);
-	  };
+	// constants
+	var TAU = 2 * Math.PI;
+	var EQUATORIAL_RADIUS = 6356752.314245179;
+	var POLAR_RADIUS = 6378137.0;
+	function geoLatToMeters(dLat) {
+	  return dLat * (TAU * POLAR_RADIUS / 360);
 	}
-
-	function delayConstant(id, value) {
-	  return value = +value, function() {
-	    init(this, id).delay = value;
-	  };
+	function geoLonToMeters(dLon, atLat) {
+	  return Math.abs(atLat) >= 90 ? 0 : dLon * (TAU * EQUATORIAL_RADIUS / 360) * Math.abs(Math.cos(atLat * (Math.PI / 180)));
 	}
-
-	function transition_delay(value) {
-	  var id = this._id;
-
-	  return arguments.length
-	      ? this.each((typeof value === "function"
-	          ? delayFunction
-	          : delayConstant)(id, value))
-	      : get$2(this.node(), id).delay;
+	function geoMetersToLat(m) {
+	  return m / (TAU * POLAR_RADIUS / 360);
 	}
-
-	function durationFunction(id, value) {
-	  return function() {
-	    set$1(this, id).duration = +value.apply(this, arguments);
-	  };
+	function geoMetersToLon(m, atLat) {
+	  return Math.abs(atLat) >= 90 ? 0 : m / (TAU * EQUATORIAL_RADIUS / 360) / Math.abs(Math.cos(atLat * (Math.PI / 180)));
 	}
-
-	function durationConstant(id, value) {
-	  return value = +value, function() {
-	    set$1(this, id).duration = value;
-	  };
+	function geoMetersToOffset(meters, tileSize) {
+	  tileSize = tileSize || 256;
+	  return [meters[0] * tileSize / (TAU * EQUATORIAL_RADIUS), -meters[1] * tileSize / (TAU * POLAR_RADIUS)];
 	}
+	function geoOffsetToMeters(offset, tileSize) {
+	  tileSize = tileSize || 256;
+	  return [offset[0] * TAU * EQUATORIAL_RADIUS / tileSize, -offset[1] * TAU * POLAR_RADIUS / tileSize];
+	} // Equirectangular approximation of spherical distances on Earth
 
-	function transition_duration(value) {
-	  var id = this._id;
-
-	  return arguments.length
-	      ? this.each((typeof value === "function"
-	          ? durationFunction
-	          : durationConstant)(id, value))
-	      : get$2(this.node(), id).duration;
-	}
+	function geoSphericalDistance(a, b) {
+	  var x = geoLonToMeters(a[0] - b[0], (a[1] + b[1]) / 2);
+	  var y = geoLatToMeters(a[1] - b[1]);
+	  return Math.sqrt(x * x + y * y);
+	} // scale to zoom
 
-	function easeConstant(id, value) {
-	  if (typeof value !== "function") { throw new Error; }
-	  return function() {
-	    set$1(this, id).ease = value;
-	  };
-	}
+	function geoScaleToZoom(k, tileSize) {
+	  tileSize = tileSize || 256;
+	  var log2ts = Math.log(tileSize) * Math.LOG2E;
+	  return Math.log(k * TAU) / Math.LN2 - log2ts;
+	} // zoom to scale
 
-	function transition_ease(value) {
-	  var id = this._id;
+	function geoZoomToScale(z, tileSize) {
+	  tileSize = tileSize || 256;
+	  return tileSize * Math.pow(2, z) / TAU;
+	} // returns info about the node from `nodes` closest to the given `point`
 
-	  return arguments.length
-	      ? this.each(easeConstant(id, value))
-	      : get$2(this.node(), id).ease;
-	}
+	function geoSphericalClosestNode(nodes, point) {
+	  var minDistance = Infinity,
+	      distance;
+	  var indexOfMin;
 
-	function transition_filter(match) {
-	  if (typeof match !== "function") { match = matcher(match); }
+	  for (var i in nodes) {
+	    distance = geoSphericalDistance(nodes[i].loc, point);
 
-	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
-	      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
-	        subgroup.push(node);
-	      }
+	    if (distance < minDistance) {
+	      minDistance = distance;
+	      indexOfMin = i;
 	    }
 	  }
 
-	  return new Transition(subgroups, this._parents, this._name, this._id);
+	  if (indexOfMin !== undefined) {
+	    return {
+	      index: indexOfMin,
+	      distance: minDistance,
+	      node: nodes[indexOfMin]
+	    };
+	  } else {
+	    return null;
+	  }
 	}
 
-	function transition_merge(transition) {
-	  if (transition._id !== this._id) { throw new Error; }
-
-	  for (var groups0 = this._groups, groups1 = transition._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
-	    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
-	      if (node = group0[i] || group1[i]) {
-	        merge[i] = node;
-	      }
-	    }
+	function geoExtent(min, max) {
+	  if (!(this instanceof geoExtent)) {
+	    return new geoExtent(min, max);
+	  } else if (min instanceof geoExtent) {
+	    return min;
+	  } else if (min && min.length === 2 && min[0].length === 2 && min[1].length === 2) {
+	    this[0] = min[0];
+	    this[1] = min[1];
+	  } else {
+	    this[0] = min || [Infinity, Infinity];
+	    this[1] = max || min || [-Infinity, -Infinity];
 	  }
+	}
+	geoExtent.prototype = new Array(2);
+	Object.assign(geoExtent.prototype, {
+	  equals: function equals(obj) {
+	    return this[0][0] === obj[0][0] && this[0][1] === obj[0][1] && this[1][0] === obj[1][0] && this[1][1] === obj[1][1];
+	  },
+	  extend: function extend(obj) {
+	    if (!(obj instanceof geoExtent)) obj = new geoExtent(obj);
+	    return geoExtent([Math.min(obj[0][0], this[0][0]), Math.min(obj[0][1], this[0][1])], [Math.max(obj[1][0], this[1][0]), Math.max(obj[1][1], this[1][1])]);
+	  },
+	  _extend: function _extend(extent) {
+	    this[0][0] = Math.min(extent[0][0], this[0][0]);
+	    this[0][1] = Math.min(extent[0][1], this[0][1]);
+	    this[1][0] = Math.max(extent[1][0], this[1][0]);
+	    this[1][1] = Math.max(extent[1][1], this[1][1]);
+	  },
+	  area: function area() {
+	    return Math.abs((this[1][0] - this[0][0]) * (this[1][1] - this[0][1]));
+	  },
+	  center: function center() {
+	    return [(this[0][0] + this[1][0]) / 2, (this[0][1] + this[1][1]) / 2];
+	  },
+	  rectangle: function rectangle() {
+	    return [this[0][0], this[0][1], this[1][0], this[1][1]];
+	  },
+	  bbox: function bbox() {
+	    return {
+	      minX: this[0][0],
+	      minY: this[0][1],
+	      maxX: this[1][0],
+	      maxY: this[1][1]
+	    };
+	  },
+	  polygon: function polygon() {
+	    return [[this[0][0], this[0][1]], [this[0][0], this[1][1]], [this[1][0], this[1][1]], [this[1][0], this[0][1]], [this[0][0], this[0][1]]];
+	  },
+	  contains: function contains(obj) {
+	    if (!(obj instanceof geoExtent)) obj = new geoExtent(obj);
+	    return obj[0][0] >= this[0][0] && obj[0][1] >= this[0][1] && obj[1][0] <= this[1][0] && obj[1][1] <= this[1][1];
+	  },
+	  intersects: function intersects(obj) {
+	    if (!(obj instanceof geoExtent)) obj = new geoExtent(obj);
+	    return obj[0][0] <= this[1][0] && obj[0][1] <= this[1][1] && obj[1][0] >= this[0][0] && obj[1][1] >= this[0][1];
+	  },
+	  intersection: function intersection(obj) {
+	    if (!this.intersects(obj)) return new geoExtent();
+	    return new geoExtent([Math.max(obj[0][0], this[0][0]), Math.max(obj[0][1], this[0][1])], [Math.min(obj[1][0], this[1][0]), Math.min(obj[1][1], this[1][1])]);
+	  },
+	  percentContainedIn: function percentContainedIn(obj) {
+	    if (!(obj instanceof geoExtent)) obj = new geoExtent(obj);
+	    var a1 = this.intersection(obj).area();
+	    var a2 = this.area();
+
+	    if (a1 === Infinity || a2 === Infinity) {
+	      return 0;
+	    } else if (a1 === 0 || a2 === 0) {
+	      if (obj.contains(this)) {
+	        return 1;
+	      }
 
-	  for (; j < m0; ++j) {
-	    merges[j] = groups0[j];
+	      return 0;
+	    } else {
+	      return a1 / a2;
+	    }
+	  },
+	  padByMeters: function padByMeters(meters) {
+	    var dLat = geoMetersToLat(meters);
+	    var dLon = geoMetersToLon(meters, this.center()[1]);
+	    return geoExtent([this[0][0] - dLon, this[0][1] - dLat], [this[1][0] + dLon, this[1][1] + dLat]);
+	  },
+	  toParam: function toParam() {
+	    return this.rectangle().join(',');
 	  }
+	});
 
-	  return new Transition(merges, this._parents, this._name, this._id);
-	}
-
-	function start(name) {
-	  return (name + "").trim().split(/^|\s+/).every(function(t) {
-	    var i = t.indexOf(".");
-	    if (i >= 0) { t = t.slice(0, i); }
-	    return !t || t === "start";
-	  });
-	}
+	var $$p = _export;
+	var $every = arrayIteration.every;
+	var arrayMethodIsStrict$1 = arrayMethodIsStrict$8;
 
-	function onFunction(id, name, listener) {
-	  var on0, on1, sit = start(name) ? init : set$1;
-	  return function() {
-	    var schedule = sit(this, id),
-	        on = schedule.on;
+	var STRICT_METHOD$1 = arrayMethodIsStrict$1('every');
 
-	    // If this node shared a dispatch with the previous node,
-	    // just assign the updated shared dispatch and we’re done!
-	    // Otherwise, copy-on-write.
-	    if (on !== on0) { (on1 = (on0 = on).copy()).on(name, listener); }
+	// `Array.prototype.every` method
+	// https://tc39.es/ecma262/#sec-array.prototype.every
+	$$p({ target: 'Array', proto: true, forced: !STRICT_METHOD$1 }, {
+	  every: function every(callbackfn /* , thisArg */) {
+	    return $every(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
 
-	    schedule.on = on1;
-	  };
-	}
+	var $$o = _export;
+	var $reduce = arrayReduce.left;
+	var arrayMethodIsStrict = arrayMethodIsStrict$8;
+	var CHROME_VERSION = engineV8Version;
+	var IS_NODE = engineIsNode;
 
-	function transition_on(name, listener) {
-	  var id = this._id;
+	var STRICT_METHOD = arrayMethodIsStrict('reduce');
+	// Chrome 80-82 has a critical bug
+	// https://bugs.chromium.org/p/chromium/issues/detail?id=1049982
+	var CHROME_BUG = !IS_NODE && CHROME_VERSION > 79 && CHROME_VERSION < 83;
 
-	  return arguments.length < 2
-	      ? get$2(this.node(), id).on.on(name)
-	      : this.each(onFunction(id, name, listener));
-	}
+	// `Array.prototype.reduce` method
+	// https://tc39.es/ecma262/#sec-array.prototype.reduce
+	$$o({ target: 'Array', proto: true, forced: !STRICT_METHOD || CHROME_BUG }, {
+	  reduce: function reduce(callbackfn /* , initialValue */) {
+	    return $reduce(this, callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
 
-	function removeFunction(id) {
-	  return function() {
-	    var parent = this.parentNode;
-	    for (var i in this.__transition) { if (+i !== id) { return; } }
-	    if (parent) { parent.removeChild(this); }
-	  };
-	}
+	function d3_polygonArea (polygon) {
+	  var i = -1,
+	      n = polygon.length,
+	      a,
+	      b = polygon[n - 1],
+	      area = 0;
 
-	function transition_remove() {
-	  return this.on("end.remove", removeFunction(this._id));
-	}
+	  while (++i < n) {
+	    a = b;
+	    b = polygon[i];
+	    area += a[1] * b[0] - a[0] * b[1];
+	  }
 
-	function transition_select(select) {
-	  var name = this._name,
-	      id = this._id;
+	  return area / 2;
+	}
 
-	  if (typeof select !== "function") { select = selector(select); }
+	function d3_polygonCentroid (polygon) {
+	  var i = -1,
+	      n = polygon.length,
+	      x = 0,
+	      y = 0,
+	      a,
+	      b = polygon[n - 1],
+	      c,
+	      k = 0;
 
-	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
-	      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
-	        if ("__data__" in node) { subnode.__data__ = node.__data__; }
-	        subgroup[i] = subnode;
-	        schedule(subgroup[i], name, id, i, subgroup, get$2(node, id));
-	      }
-	    }
+	  while (++i < n) {
+	    a = b;
+	    b = polygon[i];
+	    k += c = a[0] * b[1] - b[0] * a[1];
+	    x += (a[0] + b[0]) * c;
+	    y += (a[1] + b[1]) * c;
 	  }
 
-	  return new Transition(subgroups, this._parents, name, id);
+	  return k *= 3, [x / k, y / k];
 	}
 
-	function transition_selectAll(select) {
-	  var name = this._name,
-	      id = this._id;
+	// Returns the 2D cross product of AB and AC vectors, i.e., the z-component of
+	// the 3D cross product in a quadrant I Cartesian coordinate system (+x is
+	// right, +y is up). Returns a positive value if ABC is counter-clockwise,
+	// negative if clockwise, and zero if the points are collinear.
+	function cross (a, b, c) {
+	  return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);
+	}
 
-	  if (typeof select !== "function") { select = selectorAll(select); }
+	function lexicographicOrder(a, b) {
+	  return a[0] - b[0] || a[1] - b[1];
+	} // Computes the upper convex hull per the monotone chain algorithm.
+	// Assumes points.length >= 3, is sorted by x, unique in y.
+	// Returns an array of indices into points in left-to-right order.
 
-	  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
-	      if (node = group[i]) {
-	        for (var children = select.call(node, node.__data__, i, group), child, inherit = get$2(node, id), k = 0, l = children.length; k < l; ++k) {
-	          if (child = children[k]) {
-	            schedule(child, name, id, k, children, inherit);
-	          }
-	        }
-	        subgroups.push(children);
-	        parents.push(node);
-	      }
+
+	function computeUpperHullIndexes(points) {
+	  var n = points.length,
+	      indexes = [0, 1];
+	  var size = 2,
+	      i;
+
+	  for (i = 2; i < n; ++i) {
+	    while (size > 1 && cross(points[indexes[size - 2]], points[indexes[size - 1]], points[i]) <= 0) {
+	      --size;
 	    }
+
+	    indexes[size++] = i;
 	  }
 
-	  return new Transition(subgroups, parents, name, id);
+	  return indexes.slice(0, size); // remove popped points
 	}
 
-	var Selection$1 = selection.prototype.constructor;
+	function d3_polygonHull (points) {
+	  if ((n = points.length) < 3) return null;
+	  var i,
+	      n,
+	      sortedPoints = new Array(n),
+	      flippedPoints = new Array(n);
 
-	function transition_selection() {
-	  return new Selection$1(this._groups, this._parents);
-	}
+	  for (i = 0; i < n; ++i) {
+	    sortedPoints[i] = [+points[i][0], +points[i][1], i];
+	  }
 
-	function styleNull(name, interpolate) {
-	  var string00,
-	      string10,
-	      interpolate0;
-	  return function() {
-	    var string0 = styleValue(this, name),
-	        string1 = (this.style.removeProperty(name), styleValue(this, name));
-	    return string0 === string1 ? null
-	        : string0 === string00 && string1 === string10 ? interpolate0
-	        : interpolate0 = interpolate(string00 = string0, string10 = string1);
-	  };
-	}
+	  sortedPoints.sort(lexicographicOrder);
 
-	function styleRemove$1(name) {
-	  return function() {
-	    this.style.removeProperty(name);
-	  };
-	}
+	  for (i = 0; i < n; ++i) {
+	    flippedPoints[i] = [sortedPoints[i][0], -sortedPoints[i][1]];
+	  }
 
-	function styleConstant$1(name, interpolate, value1) {
-	  var string00,
-	      string1 = value1 + "",
-	      interpolate0;
-	  return function() {
-	    var string0 = styleValue(this, name);
-	    return string0 === string1 ? null
-	        : string0 === string00 ? interpolate0
-	        : interpolate0 = interpolate(string00 = string0, value1);
-	  };
-	}
+	  var upperIndexes = computeUpperHullIndexes(sortedPoints),
+	      lowerIndexes = computeUpperHullIndexes(flippedPoints); // Construct the hull polygon, removing possible duplicate endpoints.
 
-	function styleFunction$1(name, interpolate, value) {
-	  var string00,
-	      string10,
-	      interpolate0;
-	  return function() {
-	    var string0 = styleValue(this, name),
-	        value1 = value(this),
-	        string1 = value1 + "";
-	    if (value1 == null) { string1 = value1 = (this.style.removeProperty(name), styleValue(this, name)); }
-	    return string0 === string1 ? null
-	        : string0 === string00 && string1 === string10 ? interpolate0
-	        : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
-	  };
-	}
+	  var skipLeft = lowerIndexes[0] === upperIndexes[0],
+	      skipRight = lowerIndexes[lowerIndexes.length - 1] === upperIndexes[upperIndexes.length - 1],
+	      hull = []; // Add upper hull in right-to-l order.
+	  // Then add lower hull in left-to-right order.
 
-	function styleMaybeRemove(id, name) {
-	  var on0, on1, listener0, key = "style." + name, event = "end." + key, remove;
-	  return function() {
-	    var schedule = set$1(this, id),
-	        on = schedule.on,
-	        listener = schedule.value[key] == null ? remove || (remove = styleRemove$1(name)) : undefined;
+	  for (i = upperIndexes.length - 1; i >= 0; --i) {
+	    hull.push(points[sortedPoints[upperIndexes[i]][2]]);
+	  }
 
-	    // If this node shared a dispatch with the previous node,
-	    // just assign the updated shared dispatch and we’re done!
-	    // Otherwise, copy-on-write.
-	    if (on !== on0 || listener0 !== listener) { (on1 = (on0 = on).copy()).on(event, listener0 = listener); }
+	  for (i = +skipLeft; i < lowerIndexes.length - skipRight; ++i) {
+	    hull.push(points[sortedPoints[lowerIndexes[i]][2]]);
+	  }
 
-	    schedule.on = on1;
-	  };
+	  return hull;
 	}
 
-	function transition_style(name, value, priority) {
-	  var i = (name += "") === "transform" ? interpolateTransformCss : interpolate$1;
-	  return value == null ? this
-	      .styleTween(name, styleNull(name, i))
-	      .on("end.style." + name, styleRemove$1(name))
-	    : typeof value === "function" ? this
-	      .styleTween(name, styleFunction$1(name, i, tweenValue(this, "style." + name, value)))
-	      .each(styleMaybeRemove(this._id, name))
-	    : this
-	      .styleTween(name, styleConstant$1(name, i, value), priority)
-	      .on("end.style." + name, null);
-	}
+	// vector equals
+	function geoVecEqual(a, b, epsilon) {
+	  if (epsilon) {
+	    return Math.abs(a[0] - b[0]) <= epsilon && Math.abs(a[1] - b[1]) <= epsilon;
+	  } else {
+	    return a[0] === b[0] && a[1] === b[1];
+	  }
+	} // vector addition
 
-	function styleInterpolate(name, i, priority) {
-	  return function(t) {
-	    this.style.setProperty(name, i.call(this, t), priority);
-	  };
-	}
+	function geoVecAdd(a, b) {
+	  return [a[0] + b[0], a[1] + b[1]];
+	} // vector subtraction
 
-	function styleTween(name, value, priority) {
-	  var t, i0;
-	  function tween() {
-	    var i = value.apply(this, arguments);
-	    if (i !== i0) { t = (i0 = i) && styleInterpolate(name, i, priority); }
-	    return t;
-	  }
-	  tween._value = value;
-	  return tween;
-	}
+	function geoVecSubtract(a, b) {
+	  return [a[0] - b[0], a[1] - b[1]];
+	} // vector scaling
 
-	function transition_styleTween(name, value, priority) {
-	  var key = "style." + (name += "");
-	  if (arguments.length < 2) { return (key = this.tween(key)) && key._value; }
-	  if (value == null) { return this.tween(key, null); }
-	  if (typeof value !== "function") { throw new Error; }
-	  return this.tween(key, styleTween(name, value, priority == null ? "" : priority));
-	}
+	function geoVecScale(a, mag) {
+	  return [a[0] * mag, a[1] * mag];
+	} // vector rounding (was: geoRoundCoordinates)
 
-	function textConstant$1(value) {
-	  return function() {
-	    this.textContent = value;
-	  };
-	}
+	function geoVecFloor(a) {
+	  return [Math.floor(a[0]), Math.floor(a[1])];
+	} // linear interpolation
 
-	function textFunction$1(value) {
-	  return function() {
-	    var value1 = value(this);
-	    this.textContent = value1 == null ? "" : value1;
-	  };
-	}
+	function geoVecInterp(a, b, t) {
+	  return [a[0] + (b[0] - a[0]) * t, a[1] + (b[1] - a[1]) * t];
+	} // http://jsperf.com/id-dist-optimization
 
-	function transition_text(value) {
-	  return this.tween("text", typeof value === "function"
-	      ? textFunction$1(tweenValue(this, "text", value))
-	      : textConstant$1(value == null ? "" : value + ""));
-	}
+	function geoVecLength(a, b) {
+	  return Math.sqrt(geoVecLengthSquare(a, b));
+	} // length of vector raised to the power two
 
-	function textInterpolate(i) {
-	  return function(t) {
-	    this.textContent = i.call(this, t);
-	  };
-	}
+	function geoVecLengthSquare(a, b) {
+	  b = b || [0, 0];
+	  var x = a[0] - b[0];
+	  var y = a[1] - b[1];
+	  return x * x + y * y;
+	} // get a unit vector
 
-	function textTween(value) {
-	  var t0, i0;
-	  function tween() {
-	    var i = value.apply(this, arguments);
-	    if (i !== i0) { t0 = (i0 = i) && textInterpolate(i); }
-	    return t0;
+	function geoVecNormalize(a) {
+	  var length = Math.sqrt(a[0] * a[0] + a[1] * a[1]);
+
+	  if (length !== 0) {
+	    return geoVecScale(a, 1 / length);
 	  }
-	  tween._value = value;
-	  return tween;
-	}
 
-	function transition_textTween(value) {
-	  var key = "text";
-	  if (arguments.length < 1) { return (key = this.tween(key)) && key._value; }
-	  if (value == null) { return this.tween(key, null); }
-	  if (typeof value !== "function") { throw new Error; }
-	  return this.tween(key, textTween(value));
-	}
+	  return [0, 0];
+	} // Return the counterclockwise angle in the range (-pi, pi)
+	// between the positive X axis and the line intersecting a and b.
 
-	function transition_transition() {
-	  var name = this._name,
-	      id0 = this._id,
-	      id1 = newId();
+	function geoVecAngle(a, b) {
+	  return Math.atan2(b[1] - a[1], b[0] - a[0]);
+	} // dot product
 
-	  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
-	      if (node = group[i]) {
-	        var inherit = get$2(node, id0);
-	        schedule(node, name, id1, i, group, {
-	          time: inherit.time + inherit.delay + inherit.duration,
-	          delay: 0,
-	          duration: inherit.duration,
-	          ease: inherit.ease
-	        });
-	      }
+	function geoVecDot(a, b, origin) {
+	  origin = origin || [0, 0];
+	  var p = geoVecSubtract(a, origin);
+	  var q = geoVecSubtract(b, origin);
+	  return p[0] * q[0] + p[1] * q[1];
+	} // normalized dot product
+
+	function geoVecNormalizedDot(a, b, origin) {
+	  origin = origin || [0, 0];
+	  var p = geoVecNormalize(geoVecSubtract(a, origin));
+	  var q = geoVecNormalize(geoVecSubtract(b, origin));
+	  return geoVecDot(p, q);
+	} // 2D cross product of OA and OB vectors, returns magnitude of Z vector
+	// Returns a positive value, if OAB makes a counter-clockwise turn,
+	// negative for clockwise turn, and zero if the points are collinear.
+
+	function geoVecCross(a, b, origin) {
+	  origin = origin || [0, 0];
+	  var p = geoVecSubtract(a, origin);
+	  var q = geoVecSubtract(b, origin);
+	  return p[0] * q[1] - p[1] * q[0];
+	} // find closest orthogonal projection of point onto points array
+
+	function geoVecProject(a, points) {
+	  var min = Infinity;
+	  var idx;
+	  var target;
+
+	  for (var i = 0; i < points.length - 1; i++) {
+	    var o = points[i];
+	    var s = geoVecSubtract(points[i + 1], o);
+	    var v = geoVecSubtract(a, o);
+	    var proj = geoVecDot(v, s) / geoVecDot(s, s);
+	    var p;
+
+	    if (proj < 0) {
+	      p = o;
+	    } else if (proj > 1) {
+	      p = points[i + 1];
+	    } else {
+	      p = [o[0] + proj * s[0], o[1] + proj * s[1]];
+	    }
+
+	    var dist = geoVecLength(p, a);
+
+	    if (dist < min) {
+	      min = dist;
+	      idx = i + 1;
+	      target = p;
 	    }
 	  }
 
-	  return new Transition(groups, this._parents, name, id1);
+	  if (idx !== undefined) {
+	    return {
+	      index: idx,
+	      distance: min,
+	      target: target
+	    };
+	  } else {
+	    return null;
+	  }
 	}
 
-	function transition_end() {
-	  var on0, on1, that = this, id = that._id, size = that.size();
-	  return new Promise(function(resolve, reject) {
-	    var cancel = {value: reject},
-	        end = {value: function() { if (--size === 0) { resolve(); } }};
+	// between the positive X axis and the line intersecting a and b.
 
-	    that.each(function() {
-	      var schedule = set$1(this, id),
-	          on = schedule.on;
+	function geoAngle(a, b, projection) {
+	  return geoVecAngle(projection(a.loc), projection(b.loc));
+	}
+	function geoEdgeEqual(a, b) {
+	  return a[0] === b[0] && a[1] === b[1] || a[0] === b[1] && a[1] === b[0];
+	} // Rotate all points counterclockwise around a pivot point by given angle
 
-	      // If this node shared a dispatch with the previous node,
-	      // just assign the updated shared dispatch and we’re done!
-	      // Otherwise, copy-on-write.
-	      if (on !== on0) {
-	        on1 = (on0 = on).copy();
-	        on1._.cancel.push(cancel);
-	        on1._.interrupt.push(cancel);
-	        on1._.end.push(end);
-	      }
+	function geoRotate(points, angle, around) {
+	  return points.map(function (point) {
+	    var radial = geoVecSubtract(point, around);
+	    return [radial[0] * Math.cos(angle) - radial[1] * Math.sin(angle) + around[0], radial[0] * Math.sin(angle) + radial[1] * Math.cos(angle) + around[1]];
+	  });
+	} // Choose the edge with the minimal distance from `point` to its orthogonal
+	// projection onto that edge, if such a projection exists, or the distance to
+	// the closest vertex on that edge. Returns an object with the `index` of the
+	// chosen edge, the chosen `loc` on that edge, and the `distance` to to it.
 
-	      schedule.on = on1;
-	    });
+	function geoChooseEdge(nodes, point, projection, activeID) {
+	  var dist = geoVecLength;
+	  var points = nodes.map(function (n) {
+	    return projection(n.loc);
 	  });
-	}
+	  var ids = nodes.map(function (n) {
+	    return n.id;
+	  });
+	  var min = Infinity;
+	  var idx;
+	  var loc;
+
+	  for (var i = 0; i < points.length - 1; i++) {
+	    if (ids[i] === activeID || ids[i + 1] === activeID) continue;
+	    var o = points[i];
+	    var s = geoVecSubtract(points[i + 1], o);
+	    var v = geoVecSubtract(point, o);
+	    var proj = geoVecDot(v, s) / geoVecDot(s, s);
+	    var p;
+
+	    if (proj < 0) {
+	      p = o;
+	    } else if (proj > 1) {
+	      p = points[i + 1];
+	    } else {
+	      p = [o[0] + proj * s[0], o[1] + proj * s[1]];
+	    }
 
-	var id$3 = 0;
+	    var d = dist(p, point);
 
-	function Transition(groups, parents, name, id) {
-	  this._groups = groups;
-	  this._parents = parents;
-	  this._name = name;
-	  this._id = id;
-	}
+	    if (d < min) {
+	      min = d;
+	      idx = i + 1;
+	      loc = projection.invert(p);
+	    }
+	  }
 
-	function transition(name) {
-	  return selection().transition(name);
-	}
+	  if (idx !== undefined) {
+	    return {
+	      index: idx,
+	      distance: min,
+	      loc: loc
+	    };
+	  } else {
+	    return null;
+	  }
+	} // Test active (dragged or drawing) segments against inactive segments
+	// This is used to test e.g. multipolygon rings that cross
+	// `activeNodes` is the ring containing the activeID being dragged.
+	// `inactiveNodes` is the other ring to test against
 
-	function newId() {
-	  return ++id$3;
-	}
+	function geoHasLineIntersections(activeNodes, inactiveNodes, activeID) {
+	  var actives = [];
+	  var inactives = [];
+	  var j, k, n1, n2, segment; // gather active segments (only segments in activeNodes that contain the activeID)
 
-	var selection_prototype = selection.prototype;
+	  for (j = 0; j < activeNodes.length - 1; j++) {
+	    n1 = activeNodes[j];
+	    n2 = activeNodes[j + 1];
+	    segment = [n1.loc, n2.loc];
 
-	Transition.prototype = transition.prototype = {
-	  constructor: Transition,
-	  select: transition_select,
-	  selectAll: transition_selectAll,
-	  filter: transition_filter,
-	  merge: transition_merge,
-	  selection: transition_selection,
-	  transition: transition_transition,
-	  call: selection_prototype.call,
-	  nodes: selection_prototype.nodes,
-	  node: selection_prototype.node,
-	  size: selection_prototype.size,
-	  empty: selection_prototype.empty,
-	  each: selection_prototype.each,
-	  on: transition_on,
-	  attr: transition_attr,
-	  attrTween: transition_attrTween,
-	  style: transition_style,
-	  styleTween: transition_styleTween,
-	  text: transition_text,
-	  textTween: transition_textTween,
-	  remove: transition_remove,
-	  tween: transition_tween,
-	  delay: transition_delay,
-	  duration: transition_duration,
-	  ease: transition_ease,
-	  end: transition_end
-	};
+	    if (n1.id === activeID || n2.id === activeID) {
+	      actives.push(segment);
+	    }
+	  } // gather inactive segments
 
-	function linear$1(t) {
-	  return +t;
-	}
 
-	function cubicInOut(t) {
-	  return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;
-	}
+	  for (j = 0; j < inactiveNodes.length - 1; j++) {
+	    n1 = inactiveNodes[j];
+	    n2 = inactiveNodes[j + 1];
+	    segment = [n1.loc, n2.loc];
+	    inactives.push(segment);
+	  } // test
 
-	var defaultTiming = {
-	  time: null, // Set on use.
-	  delay: 0,
-	  duration: 250,
-	  ease: cubicInOut
-	};
 
-	function inherit(node, id) {
-	  var timing;
-	  while (!(timing = node.__transition) || !(timing = timing[id])) {
-	    if (!(node = node.parentNode)) {
-	      return defaultTiming.time = now(), defaultTiming;
+	  for (j = 0; j < actives.length; j++) {
+	    for (k = 0; k < inactives.length; k++) {
+	      var p = actives[j];
+	      var q = inactives[k];
+	      var hit = geoLineIntersection(p, q);
+
+	      if (hit) {
+	        return true;
+	      }
 	    }
 	  }
-	  return timing;
-	}
 
-	function selection_transition(name) {
-	  var id,
-	      timing;
+	  return false;
+	} // Test active (dragged or drawing) segments against inactive segments
+	// This is used to test whether a way intersects with itself.
 
-	  if (name instanceof Transition) {
-	    id = name._id, name = name._name;
-	  } else {
-	    id = newId(), (timing = defaultTiming).time = now(), name = name == null ? null : name + "";
-	  }
+	function geoHasSelfIntersections(nodes, activeID) {
+	  var actives = [];
+	  var inactives = [];
+	  var j, k; // group active and passive segments along the nodes
 
-	  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
-	      if (node = group[i]) {
-	        schedule(node, name, id, i, group, timing || inherit(node, id));
-	      }
+	  for (j = 0; j < nodes.length - 1; j++) {
+	    var n1 = nodes[j];
+	    var n2 = nodes[j + 1];
+	    var segment = [n1.loc, n2.loc];
+
+	    if (n1.id === activeID || n2.id === activeID) {
+	      actives.push(segment);
+	    } else {
+	      inactives.push(segment);
 	    }
-	  }
+	  } // test
 
-	  return new Transition(groups, this._parents, name, id);
-	}
 
-	selection.prototype.interrupt = selection_interrupt;
-	selection.prototype.transition = selection_transition;
+	  for (j = 0; j < actives.length; j++) {
+	    for (k = 0; k < inactives.length; k++) {
+	      var p = actives[j];
+	      var q = inactives[k]; // skip if segments share an endpoint
 
-	function constant$3(x) {
-	  return function() {
-	    return x;
-	  };
-	}
+	      if (geoVecEqual(p[1], q[0]) || geoVecEqual(p[0], q[1]) || geoVecEqual(p[0], q[0]) || geoVecEqual(p[1], q[1])) {
+	        continue;
+	      }
 
-	function ZoomEvent(target, type, transform) {
-	  this.target = target;
-	  this.type = type;
-	  this.transform = transform;
-	}
+	      var hit = geoLineIntersection(p, q);
 
-	function Transform(k, x, y) {
-	  this.k = k;
-	  this.x = x;
-	  this.y = y;
-	}
+	      if (hit) {
+	        var epsilon = 1e-8; // skip if the hit is at the segment's endpoint
 
-	Transform.prototype = {
-	  constructor: Transform,
-	  scale: function(k) {
-	    return k === 1 ? this : new Transform(this.k * k, this.x, this.y);
-	  },
-	  translate: function(x, y) {
-	    return x === 0 & y === 0 ? this : new Transform(this.k, this.x + this.k * x, this.y + this.k * y);
-	  },
-	  apply: function(point) {
-	    return [point[0] * this.k + this.x, point[1] * this.k + this.y];
-	  },
-	  applyX: function(x) {
-	    return x * this.k + this.x;
-	  },
-	  applyY: function(y) {
-	    return y * this.k + this.y;
-	  },
-	  invert: function(location) {
-	    return [(location[0] - this.x) / this.k, (location[1] - this.y) / this.k];
-	  },
-	  invertX: function(x) {
-	    return (x - this.x) / this.k;
-	  },
-	  invertY: function(y) {
-	    return (y - this.y) / this.k;
-	  },
-	  rescaleX: function(x) {
-	    return x.copy().domain(x.range().map(this.invertX, this).map(x.invert, x));
-	  },
-	  rescaleY: function(y) {
-	    return y.copy().domain(y.range().map(this.invertY, this).map(y.invert, y));
-	  },
-	  toString: function() {
-	    return "translate(" + this.x + "," + this.y + ") scale(" + this.k + ")";
+	        if (geoVecEqual(p[1], hit, epsilon) || geoVecEqual(p[0], hit, epsilon) || geoVecEqual(q[1], hit, epsilon) || geoVecEqual(q[0], hit, epsilon)) {
+	          continue;
+	        } else {
+	          return true;
+	        }
+	      }
+	    }
 	  }
-	};
 
-	var identity$2 = new Transform(1, 0, 0);
+	  return false;
+	} // Return the intersection point of 2 line segments.
+	// From https://github.com/pgkelley4/line-segments-intersect
+	// This uses the vector cross product approach described below:
+	//  http://stackoverflow.com/a/565282/786339
 
-	function nopropagation$1() {
-	  event.stopImmediatePropagation();
-	}
+	function geoLineIntersection(a, b) {
+	  var p = [a[0][0], a[0][1]];
+	  var p2 = [a[1][0], a[1][1]];
+	  var q = [b[0][0], b[0][1]];
+	  var q2 = [b[1][0], b[1][1]];
+	  var r = geoVecSubtract(p2, p);
+	  var s = geoVecSubtract(q2, q);
+	  var uNumerator = geoVecCross(geoVecSubtract(q, p), r);
+	  var denominator = geoVecCross(r, s);
 
-	function noevent$1() {
-	  event.preventDefault();
-	  event.stopImmediatePropagation();
-	}
+	  if (uNumerator && denominator) {
+	    var u = uNumerator / denominator;
+	    var t = geoVecCross(geoVecSubtract(q, p), s) / denominator;
 
-	// Ignore right-click, since that should open the context menu.
-	function defaultFilter$1() {
-	  return !event.ctrlKey && !event.button;
+	    if (t >= 0 && t <= 1 && u >= 0 && u <= 1) {
+	      return geoVecInterp(p, p2, t);
+	    }
+	  }
+
+	  return null;
 	}
+	function geoPathIntersections(path1, path2) {
+	  var intersections = [];
 
-	function defaultExtent() {
-	  var e = this;
-	  if (e instanceof SVGElement) {
-	    e = e.ownerSVGElement || e;
-	    if (e.hasAttribute("viewBox")) {
-	      e = e.viewBox.baseVal;
-	      return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
+	  for (var i = 0; i < path1.length - 1; i++) {
+	    for (var j = 0; j < path2.length - 1; j++) {
+	      var a = [path1[i], path1[i + 1]];
+	      var b = [path2[j], path2[j + 1]];
+	      var hit = geoLineIntersection(a, b);
+
+	      if (hit) {
+	        intersections.push(hit);
+	      }
 	    }
-	    return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
 	  }
-	  return [[0, 0], [e.clientWidth, e.clientHeight]];
-	}
 
-	function defaultTransform() {
-	  return this.__zoom || identity$2;
+	  return intersections;
 	}
+	function geoPathHasIntersections(path1, path2) {
+	  for (var i = 0; i < path1.length - 1; i++) {
+	    for (var j = 0; j < path2.length - 1; j++) {
+	      var a = [path1[i], path1[i + 1]];
+	      var b = [path2[j], path2[j + 1]];
+	      var hit = geoLineIntersection(a, b);
 
-	function defaultWheelDelta() {
-	  return -event.deltaY * (event.deltaMode === 1 ? 0.05 : event.deltaMode ? 1 : 0.002);
-	}
+	      if (hit) {
+	        return true;
+	      }
+	    }
+	  }
 
-	function defaultTouchable$1() {
-	  return navigator.maxTouchPoints || ("ontouchstart" in this);
-	}
+	  return false;
+	} // Return whether point is contained in polygon.
+	//
+	// `point` should be a 2-item array of coordinates.
+	// `polygon` should be an array of 2-item arrays of coordinates.
+	//
+	// From https://github.com/substack/point-in-polygon.
+	// ray-casting algorithm based on
+	// http://www.ecse.rpi.edu/Homepages/wrf/Research/Short_Notes/pnpoly.html
+	//
 
-	function defaultConstrain(transform, extent, translateExtent) {
-	  var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],
-	      dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],
-	      dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],
-	      dy1 = transform.invertY(extent[1][1]) - translateExtent[1][1];
-	  return transform.translate(
-	    dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1),
-	    dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1)
-	  );
+	function geoPointInPolygon(point, polygon) {
+	  var x = point[0];
+	  var y = point[1];
+	  var inside = false;
+
+	  for (var i = 0, j = polygon.length - 1; i < polygon.length; j = i++) {
+	    var xi = polygon[i][0];
+	    var yi = polygon[i][1];
+	    var xj = polygon[j][0];
+	    var yj = polygon[j][1];
+	    var intersect = yi > y !== yj > y && x < (xj - xi) * (y - yi) / (yj - yi) + xi;
+	    if (intersect) inside = !inside;
+	  }
+
+	  return inside;
 	}
+	function geoPolygonContainsPolygon(outer, inner) {
+	  return inner.every(function (point) {
+	    return geoPointInPolygon(point, outer);
+	  });
+	}
+	function geoPolygonIntersectsPolygon(outer, inner, checkSegments) {
+	  function testPoints(outer, inner) {
+	    return inner.some(function (point) {
+	      return geoPointInPolygon(point, outer);
+	    });
+	  }
 
-	function d3_zoom() {
-	  var filter = defaultFilter$1,
-	      extent = defaultExtent,
-	      constrain = defaultConstrain,
-	      wheelDelta = defaultWheelDelta,
-	      touchable = defaultTouchable$1,
-	      scaleExtent = [0, Infinity],
-	      translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
-	      duration = 250,
-	      interpolate = interpolateZoom,
-	      listeners = dispatch("start", "zoom", "end"),
-	      touchstarting,
-	      touchending,
-	      touchDelay = 500,
-	      wheelDelay = 150,
-	      clickDistance2 = 0;
+	  return testPoints(outer, inner) || !!checkSegments && geoPathHasIntersections(outer, inner);
+	} // http://gis.stackexchange.com/questions/22895/finding-minimum-area-rectangle-for-given-points
+	// http://gis.stackexchange.com/questions/3739/generalisation-strategies-for-building-outlines/3756#3756
 
-	  function zoom(selection) {
-	    selection
-	        .property("__zoom", defaultTransform)
-	        .on("wheel.zoom", wheeled)
-	        .on("mousedown.zoom", mousedowned)
-	        .on("dblclick.zoom", dblclicked)
-	      .filter(touchable)
-	        .on("touchstart.zoom", touchstarted)
-	        .on("touchmove.zoom", touchmoved)
-	        .on("touchend.zoom touchcancel.zoom", touchended)
-	        .style("touch-action", "none")
-	        .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
-	  }
-
-	  zoom.transform = function(collection, transform, point) {
-	    var selection = collection.selection ? collection.selection() : collection;
-	    selection.property("__zoom", defaultTransform);
-	    if (collection !== selection) {
-	      schedule(collection, transform, point);
-	    } else {
-	      selection.interrupt().each(function() {
-	        gesture(this, arguments)
-	            .start()
-	            .zoom(null, typeof transform === "function" ? transform.apply(this, arguments) : transform)
-	            .end();
-	      });
+	function geoGetSmallestSurroundingRectangle(points) {
+	  var hull = d3_polygonHull(points);
+	  var centroid = d3_polygonCentroid(hull);
+	  var minArea = Infinity;
+	  var ssrExtent = [];
+	  var ssrAngle = 0;
+	  var c1 = hull[0];
+
+	  for (var i = 0; i <= hull.length - 1; i++) {
+	    var c2 = i === hull.length - 1 ? hull[0] : hull[i + 1];
+	    var angle = Math.atan2(c2[1] - c1[1], c2[0] - c1[0]);
+	    var poly = geoRotate(hull, -angle, centroid);
+	    var extent = poly.reduce(function (extent, point) {
+	      return extent.extend(geoExtent(point));
+	    }, geoExtent());
+	    var area = extent.area();
+
+	    if (area < minArea) {
+	      minArea = area;
+	      ssrExtent = extent;
+	      ssrAngle = angle;
 	    }
-	  };
 
-	  zoom.scaleBy = function(selection, k, p) {
-	    zoom.scaleTo(selection, function() {
-	      var k0 = this.__zoom.k,
-	          k1 = typeof k === "function" ? k.apply(this, arguments) : k;
-	      return k0 * k1;
-	    }, p);
-	  };
+	    c1 = c2;
+	  }
 
-	  zoom.scaleTo = function(selection, k, p) {
-	    zoom.transform(selection, function() {
-	      var e = extent.apply(this, arguments),
-	          t0 = this.__zoom,
-	          p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p,
-	          p1 = t0.invert(p0),
-	          k1 = typeof k === "function" ? k.apply(this, arguments) : k;
-	      return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);
-	    }, p);
+	  return {
+	    poly: geoRotate(ssrExtent.polygon(), ssrAngle, centroid),
+	    angle: ssrAngle
 	  };
+	}
+	function geoPathLength(path) {
+	  var length = 0;
 
-	  zoom.translateBy = function(selection, x, y) {
-	    zoom.transform(selection, function() {
-	      return constrain(this.__zoom.translate(
-	        typeof x === "function" ? x.apply(this, arguments) : x,
-	        typeof y === "function" ? y.apply(this, arguments) : y
-	      ), extent.apply(this, arguments), translateExtent);
-	    });
-	  };
+	  for (var i = 0; i < path.length - 1; i++) {
+	    length += geoVecLength(path[i], path[i + 1]);
+	  }
 
-	  zoom.translateTo = function(selection, x, y, p) {
-	    zoom.transform(selection, function() {
-	      var e = extent.apply(this, arguments),
-	          t = this.__zoom,
-	          p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p;
-	      return constrain(identity$2.translate(p0[0], p0[1]).scale(t.k).translate(
-	        typeof x === "function" ? -x.apply(this, arguments) : -x,
-	        typeof y === "function" ? -y.apply(this, arguments) : -y
-	      ), e, translateExtent);
-	    }, p);
-	  };
+	  return length;
+	} // If the given point is at the edge of the padded viewport,
+	// return a vector that will nudge the viewport in that direction
 
-	  function scale(transform, k) {
-	    k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], k));
-	    return k === transform.k ? transform : new Transform(k, transform.x, transform.y);
+	function geoViewportEdge(point, dimensions) {
+	  var pad = [80, 20, 50, 20]; // top, right, bottom, left
+
+	  var x = 0;
+	  var y = 0;
+
+	  if (point[0] > dimensions[0] - pad[1]) {
+	    x = -10;
 	  }
 
-	  function translate(transform, p0, p1) {
-	    var x = p0[0] - p1[0] * transform.k, y = p0[1] - p1[1] * transform.k;
-	    return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
+	  if (point[0] < pad[3]) {
+	    x = 10;
 	  }
 
-	  function centroid(extent) {
-	    return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
+	  if (point[1] > dimensions[1] - pad[2]) {
+	    y = -10;
 	  }
 
-	  function schedule(transition, transform, point) {
-	    transition
-	        .on("start.zoom", function() { gesture(this, arguments).start(); })
-	        .on("interrupt.zoom end.zoom", function() { gesture(this, arguments).end(); })
-	        .tween("zoom", function() {
-	          var that = this,
-	              args = arguments,
-	              g = gesture(that, args),
-	              e = extent.apply(that, args),
-	              p = point == null ? centroid(e) : typeof point === "function" ? point.apply(that, args) : point,
-	              w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
-	              a = that.__zoom,
-	              b = typeof transform === "function" ? transform.apply(that, args) : transform,
-	              i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
-	          return function(t) {
-	            if (t === 1) { t = b; } // Avoid rounding error on end.
-	            else { var l = i(t), k = w / l[2]; t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k); }
-	            g.zoom(null, t);
-	          };
-	        });
+	  if (point[1] < pad[0]) {
+	    y = 10;
 	  }
 
-	  function gesture(that, args, clean) {
-	    return (!clean && that.__zooming) || new Gesture(that, args);
+	  if (x || y) {
+	    return [x, y];
+	  } else {
+	    return null;
 	  }
+	}
 
-	  function Gesture(that, args) {
-	    this.that = that;
-	    this.args = args;
-	    this.active = 0;
-	    this.extent = extent.apply(that, args);
-	    this.taps = 0;
+	var noop = {
+	  value: function value() {}
+	};
+
+	function dispatch$8() {
+	  for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
+	    if (!(t = arguments[i] + "") || t in _ || /[\s.]/.test(t)) throw new Error("illegal type: " + t);
+	    _[t] = [];
 	  }
 
-	  Gesture.prototype = {
-	    start: function() {
-	      if (++this.active === 1) {
-	        this.that.__zooming = this;
-	        this.emit("start");
-	      }
-	      return this;
-	    },
-	    zoom: function(key, transform) {
-	      if (this.mouse && key !== "mouse") { this.mouse[1] = transform.invert(this.mouse[0]); }
-	      if (this.touch0 && key !== "touch") { this.touch0[1] = transform.invert(this.touch0[0]); }
-	      if (this.touch1 && key !== "touch") { this.touch1[1] = transform.invert(this.touch1[0]); }
-	      this.that.__zoom = transform;
-	      this.emit("zoom");
-	      return this;
-	    },
-	    end: function() {
-	      if (--this.active === 0) {
-	        delete this.that.__zooming;
-	        this.emit("end");
+	  return new Dispatch(_);
+	}
+
+	function Dispatch(_) {
+	  this._ = _;
+	}
+
+	function parseTypenames$1(typenames, types) {
+	  return typenames.trim().split(/^|\s+/).map(function (t) {
+	    var name = "",
+	        i = t.indexOf(".");
+	    if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
+	    if (t && !types.hasOwnProperty(t)) throw new Error("unknown type: " + t);
+	    return {
+	      type: t,
+	      name: name
+	    };
+	  });
+	}
+
+	Dispatch.prototype = dispatch$8.prototype = {
+	  constructor: Dispatch,
+	  on: function on(typename, callback) {
+	    var _ = this._,
+	        T = parseTypenames$1(typename + "", _),
+	        t,
+	        i = -1,
+	        n = T.length; // If no callback was specified, return the callback of the given type and name.
+
+	    if (arguments.length < 2) {
+	      while (++i < n) {
+	        if ((t = (typename = T[i]).type) && (t = get$2(_[t], typename.name))) return t;
 	      }
-	      return this;
-	    },
-	    emit: function(type) {
-	      customEvent(new ZoomEvent(zoom, type, this.that.__zoom), listeners.apply, listeners, [type, this.that, this.args]);
-	    }
-	  };
 
-	  function wheeled() {
-	    if (!filter.apply(this, arguments)) { return; }
-	    var g = gesture(this, arguments),
-	        t = this.__zoom,
-	        k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], t.k * Math.pow(2, wheelDelta.apply(this, arguments)))),
-	        p = mouse(this);
+	      return;
+	    } // If a type was specified, set the callback for the given type and name.
+	    // Otherwise, if a null callback was specified, remove callbacks of the given name.
 
-	    // If the mouse is in the same location as before, reuse it.
-	    // If there were recent wheel events, reset the wheel idle timeout.
-	    if (g.wheel) {
-	      if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
-	        g.mouse[1] = t.invert(g.mouse[0] = p);
+
+	    if (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback);
+
+	    while (++i < n) {
+	      if (t = (typename = T[i]).type) _[t] = set$1(_[t], typename.name, callback);else if (callback == null) for (t in _) {
+	        _[t] = set$1(_[t], typename.name, null);
 	      }
-	      clearTimeout(g.wheel);
 	    }
 
-	    // If this wheel event won’t trigger a transform change, ignore it.
-	    else if (t.k === k) { return; }
+	    return this;
+	  },
+	  copy: function copy() {
+	    var copy = {},
+	        _ = this._;
 
-	    // Otherwise, capture the mouse point and location at the start.
-	    else {
-	      g.mouse = [p, t.invert(p)];
-	      interrupt(this);
-	      g.start();
+	    for (var t in _) {
+	      copy[t] = _[t].slice();
 	    }
 
-	    noevent$1();
-	    g.wheel = setTimeout(wheelidled, wheelDelay);
-	    g.zoom("mouse", constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));
-
-	    function wheelidled() {
-	      g.wheel = null;
-	      g.end();
+	    return new Dispatch(copy);
+	  },
+	  call: function call(type, that) {
+	    if ((n = arguments.length - 2) > 0) for (var args = new Array(n), i = 0, n, t; i < n; ++i) {
+	      args[i] = arguments[i + 2];
 	    }
-	  }
+	    if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
 
-	  function mousedowned() {
-	    if (touchending || !filter.apply(this, arguments)) { return; }
-	    var g = gesture(this, arguments, true),
-	        v = select(event.view).on("mousemove.zoom", mousemoved, true).on("mouseup.zoom", mouseupped, true),
-	        p = mouse(this),
-	        x0 = event.clientX,
-	        y0 = event.clientY;
+	    for (t = this._[type], i = 0, n = t.length; i < n; ++i) {
+	      t[i].value.apply(that, args);
+	    }
+	  },
+	  apply: function apply(type, that, args) {
+	    if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
 
-	    dragDisable(event.view);
-	    nopropagation$1();
-	    g.mouse = [p, this.__zoom.invert(p)];
-	    interrupt(this);
-	    g.start();
+	    for (var t = this._[type], i = 0, n = t.length; i < n; ++i) {
+	      t[i].value.apply(that, args);
+	    }
+	  }
+	};
 
-	    function mousemoved() {
-	      noevent$1();
-	      if (!g.moved) {
-	        var dx = event.clientX - x0, dy = event.clientY - y0;
-	        g.moved = dx * dx + dy * dy > clickDistance2;
-	      }
-	      g.zoom("mouse", constrain(translate(g.that.__zoom, g.mouse[0] = mouse(g.that), g.mouse[1]), g.extent, translateExtent));
+	function get$2(type, name) {
+	  for (var i = 0, n = type.length, c; i < n; ++i) {
+	    if ((c = type[i]).name === name) {
+	      return c.value;
 	    }
+	  }
+	}
 
-	    function mouseupped() {
-	      v.on("mousemove.zoom mouseup.zoom", null);
-	      yesdrag(event.view, g.moved);
-	      noevent$1();
-	      g.end();
+	function set$1(type, name, callback) {
+	  for (var i = 0, n = type.length; i < n; ++i) {
+	    if (type[i].name === name) {
+	      type[i] = noop, type = type.slice(0, i).concat(type.slice(i + 1));
+	      break;
 	    }
 	  }
 
-	  function dblclicked() {
-	    if (!filter.apply(this, arguments)) { return; }
-	    var t0 = this.__zoom,
-	        p0 = mouse(this),
-	        p1 = t0.invert(p0),
-	        k1 = t0.k * (event.shiftKey ? 0.5 : 2),
-	        t1 = constrain(translate(scale(t0, k1), p0, p1), extent.apply(this, arguments), translateExtent);
+	  if (callback != null) type.push({
+	    name: name,
+	    value: callback
+	  });
+	  return type;
+	}
 
-	    noevent$1();
-	    if (duration > 0) { select(this).transition().duration(duration).call(schedule, t1, p0); }
-	    else { select(this).call(zoom.transform, t1); }
-	  }
+	var xhtml = "http://www.w3.org/1999/xhtml";
+	var namespaces = {
+	  svg: "http://www.w3.org/2000/svg",
+	  xhtml: xhtml,
+	  xlink: "http://www.w3.org/1999/xlink",
+	  xml: "http://www.w3.org/XML/1998/namespace",
+	  xmlns: "http://www.w3.org/2000/xmlns/"
+	};
 
-	  function touchstarted() {
-	    if (!filter.apply(this, arguments)) { return; }
-	    var touches = event.touches,
-	        n = touches.length,
-	        g = gesture(this, arguments, event.changedTouches.length === n),
-	        started, i, t, p;
+	function namespace (name) {
+	  var prefix = name += "",
+	      i = prefix.indexOf(":");
+	  if (i >= 0 && (prefix = name.slice(0, i)) !== "xmlns") name = name.slice(i + 1);
+	  return namespaces.hasOwnProperty(prefix) ? {
+	    space: namespaces[prefix],
+	    local: name
+	  } : name; // eslint-disable-line no-prototype-builtins
+	}
 
-	    nopropagation$1();
-	    for (i = 0; i < n; ++i) {
-	      t = touches[i], p = touch(this, touches, t.identifier);
-	      p = [p, this.__zoom.invert(p), t.identifier];
-	      if (!g.touch0) { g.touch0 = p, started = true, g.taps = 1 + !!touchstarting; }
-	      else if (!g.touch1 && g.touch0[2] !== p[2]) { g.touch1 = p, g.taps = 0; }
-	    }
+	function creatorInherit(name) {
+	  return function () {
+	    var document = this.ownerDocument,
+	        uri = this.namespaceURI;
+	    return uri === xhtml && document.documentElement.namespaceURI === xhtml ? document.createElement(name) : document.createElementNS(uri, name);
+	  };
+	}
 
-	    if (touchstarting) { touchstarting = clearTimeout(touchstarting); }
+	function creatorFixed(fullname) {
+	  return function () {
+	    return this.ownerDocument.createElementNS(fullname.space, fullname.local);
+	  };
+	}
 
-	    if (started) {
-	      if (g.taps < 2) { touchstarting = setTimeout(function() { touchstarting = null; }, touchDelay); }
-	      interrupt(this);
-	      g.start();
-	    }
-	  }
+	function creator (name) {
+	  var fullname = namespace(name);
+	  return (fullname.local ? creatorFixed : creatorInherit)(fullname);
+	}
 
-	  function touchmoved() {
-	    if (!this.__zooming) { return; }
-	    var g = gesture(this, arguments),
-	        touches = event.changedTouches,
-	        n = touches.length, i, t, p, l;
+	function none() {}
 
-	    noevent$1();
-	    if (touchstarting) { touchstarting = clearTimeout(touchstarting); }
-	    g.taps = 0;
-	    for (i = 0; i < n; ++i) {
-	      t = touches[i], p = touch(this, touches, t.identifier);
-	      if (g.touch0 && g.touch0[2] === t.identifier) { g.touch0[0] = p; }
-	      else if (g.touch1 && g.touch1[2] === t.identifier) { g.touch1[0] = p; }
-	    }
-	    t = g.that.__zoom;
-	    if (g.touch1) {
-	      var p0 = g.touch0[0], l0 = g.touch0[1],
-	          p1 = g.touch1[0], l1 = g.touch1[1],
-	          dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
-	          dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
-	      t = scale(t, Math.sqrt(dp / dl));
-	      p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
-	      l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
-	    }
-	    else if (g.touch0) { p = g.touch0[0], l = g.touch0[1]; }
-	    else { return; }
-	    g.zoom("touch", constrain(translate(t, p, l), g.extent, translateExtent));
-	  }
+	function selector (selector) {
+	  return selector == null ? none : function () {
+	    return this.querySelector(selector);
+	  };
+	}
 
-	  function touchended() {
-	    if (!this.__zooming) { return; }
-	    var g = gesture(this, arguments),
-	        touches = event.changedTouches,
-	        n = touches.length, i, t;
+	function selection_select (select) {
+	  if (typeof select !== "function") select = selector(select);
 
-	    nopropagation$1();
-	    if (touchending) { clearTimeout(touchending); }
-	    touchending = setTimeout(function() { touchending = null; }, touchDelay);
-	    for (i = 0; i < n; ++i) {
-	      t = touches[i];
-	      if (g.touch0 && g.touch0[2] === t.identifier) { delete g.touch0; }
-	      else if (g.touch1 && g.touch1[2] === t.identifier) { delete g.touch1; }
-	    }
-	    if (g.touch1 && !g.touch0) { g.touch0 = g.touch1, delete g.touch1; }
-	    if (g.touch0) { g.touch0[1] = this.__zoom.invert(g.touch0[0]); }
-	    else {
-	      g.end();
-	      // If this was a dbltap, reroute to the (optional) dblclick.zoom handler.
-	      if (g.taps === 2) {
-	        var p = select(this).on("dblclick.zoom");
-	        if (p) { p.apply(this, arguments); }
+	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
+	      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
+	        if ("__data__" in node) subnode.__data__ = node.__data__;
+	        subgroup[i] = subnode;
 	      }
 	    }
 	  }
 
-	  zoom.wheelDelta = function(_) {
-	    return arguments.length ? (wheelDelta = typeof _ === "function" ? _ : constant$3(+_), zoom) : wheelDelta;
-	  };
+	  return new Selection$1(subgroups, this._parents);
+	}
 
-	  zoom.filter = function(_) {
-	    return arguments.length ? (filter = typeof _ === "function" ? _ : constant$3(!!_), zoom) : filter;
-	  };
+	function array (x) {
+	  return _typeof(x) === "object" && "length" in x ? x // Array, TypedArray, NodeList, array-like
+	  : Array.from(x); // Map, Set, iterable, string, or anything else
+	}
 
-	  zoom.touchable = function(_) {
-	    return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$3(!!_), zoom) : touchable;
-	  };
+	function empty() {
+	  return [];
+	}
 
-	  zoom.extent = function(_) {
-	    return arguments.length ? (extent = typeof _ === "function" ? _ : constant$3([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
+	function selectorAll (selector) {
+	  return selector == null ? empty : function () {
+	    return this.querySelectorAll(selector);
 	  };
+	}
 
-	  zoom.scaleExtent = function(_) {
-	    return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
+	function arrayAll(select) {
+	  return function () {
+	    var group = select.apply(this, arguments);
+	    return group == null ? [] : array(group);
 	  };
+	}
 
-	  zoom.translateExtent = function(_) {
-	    return arguments.length ? (translateExtent[0][0] = +_[0][0], translateExtent[1][0] = +_[1][0], translateExtent[0][1] = +_[0][1], translateExtent[1][1] = +_[1][1], zoom) : [[translateExtent[0][0], translateExtent[0][1]], [translateExtent[1][0], translateExtent[1][1]]];
-	  };
+	function selection_selectAll (select) {
+	  if (typeof select === "function") select = arrayAll(select);else select = selectorAll(select);
 
-	  zoom.constrain = function(_) {
-	    return arguments.length ? (constrain = _, zoom) : constrain;
-	  };
+	  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+	      if (node = group[i]) {
+	        subgroups.push(select.call(node, node.__data__, i, group));
+	        parents.push(node);
+	      }
+	    }
+	  }
 
-	  zoom.duration = function(_) {
-	    return arguments.length ? (duration = +_, zoom) : duration;
-	  };
+	  return new Selection$1(subgroups, parents);
+	}
 
-	  zoom.interpolate = function(_) {
-	    return arguments.length ? (interpolate = _, zoom) : interpolate;
-	  };
+	var $$n = _export;
+	var $find = arrayIteration.find;
+	var addToUnscopables$2 = addToUnscopables$5;
 
-	  zoom.on = function() {
-	    var value = listeners.on.apply(listeners, arguments);
-	    return value === listeners ? zoom : value;
+	var FIND = 'find';
+	var SKIPS_HOLES$1 = true;
+
+	// Shouldn't skip holes
+	if (FIND in []) Array(1)[FIND](function () { SKIPS_HOLES$1 = false; });
+
+	// `Array.prototype.find` method
+	// https://tc39.es/ecma262/#sec-array.prototype.find
+	$$n({ target: 'Array', proto: true, forced: SKIPS_HOLES$1 }, {
+	  find: function find(callbackfn /* , that = undefined */) {
+	    return $find(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
+
+	// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+	addToUnscopables$2(FIND);
+
+	function matcher (selector) {
+	  return function () {
+	    return this.matches(selector);
+	  };
+	}
+	function childMatcher(selector) {
+	  return function (node) {
+	    return node.matches(selector);
 	  };
+	}
 
-	  zoom.clickDistance = function(_) {
-	    return arguments.length ? (clickDistance2 = (_ = +_) * _, zoom) : Math.sqrt(clickDistance2);
+	var find = Array.prototype.find;
+
+	function childFind(match) {
+	  return function () {
+	    return find.call(this.children, match);
 	  };
+	}
 
-	  return zoom;
+	function childFirst() {
+	  return this.firstElementChild;
 	}
 
-	/*
-	    Bypasses features of D3's default projection stream pipeline that are unnecessary:
-	    * Antimeridian clipping
-	    * Spherical rotation
-	    * Resampling
-	*/
-	function geoRawMercator() {
-	    var project = mercatorRaw;
-	    var k = 512 / Math.PI; // scale
-	    var x = 0;
-	    var y = 0; // translate
-	    var clipExtent = [[0, 0], [0, 0]];
+	function selection_selectChild (match) {
+	  return this.select(match == null ? childFirst : childFind(typeof match === "function" ? match : childMatcher(match)));
+	}
 
+	var filter = Array.prototype.filter;
 
-	    function projection(point) {
-	        point = project(point[0] * Math.PI / 180, point[1] * Math.PI / 180);
-	        return [point[0] * k + x, y - point[1] * k];
-	    }
+	function children() {
+	  return this.children;
+	}
 
+	function childrenFilter(match) {
+	  return function () {
+	    return filter.call(this.children, match);
+	  };
+	}
 
-	    projection.invert = function(point) {
-	        point = project.invert((point[0] - x) / k, (y - point[1]) / k);
-	        return point && [point[0] * 180 / Math.PI, point[1] * 180 / Math.PI];
-	    };
+	function selection_selectChildren (match) {
+	  return this.selectAll(match == null ? children : childrenFilter(typeof match === "function" ? match : childMatcher(match)));
+	}
 
+	function selection_filter (match) {
+	  if (typeof match !== "function") match = matcher(match);
 
-	    projection.scale = function(_) {
-	        if (!arguments.length) { return k; }
-	        k = +_;
-	        return projection;
-	    };
+	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
+	      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
+	        subgroup.push(node);
+	      }
+	    }
+	  }
 
+	  return new Selection$1(subgroups, this._parents);
+	}
 
-	    projection.translate = function(_) {
-	        if (!arguments.length) { return [x, y]; }
-	        x = +_[0];
-	        y = +_[1];
-	        return projection;
-	    };
+	function sparse (update) {
+	  return new Array(update.length);
+	}
 
+	function selection_enter () {
+	  return new Selection$1(this._enter || this._groups.map(sparse), this._parents);
+	}
+	function EnterNode(parent, datum) {
+	  this.ownerDocument = parent.ownerDocument;
+	  this.namespaceURI = parent.namespaceURI;
+	  this._next = null;
+	  this._parent = parent;
+	  this.__data__ = datum;
+	}
+	EnterNode.prototype = {
+	  constructor: EnterNode,
+	  appendChild: function appendChild(child) {
+	    return this._parent.insertBefore(child, this._next);
+	  },
+	  insertBefore: function insertBefore(child, next) {
+	    return this._parent.insertBefore(child, next);
+	  },
+	  querySelector: function querySelector(selector) {
+	    return this._parent.querySelector(selector);
+	  },
+	  querySelectorAll: function querySelectorAll(selector) {
+	    return this._parent.querySelectorAll(selector);
+	  }
+	};
 
-	    projection.clipExtent = function(_) {
-	        if (!arguments.length) { return clipExtent; }
-	        clipExtent = _;
-	        return projection;
-	    };
+	function constant$3 (x) {
+	  return function () {
+	    return x;
+	  };
+	}
 
+	function bindIndex(parent, group, enter, update, exit, data) {
+	  var i = 0,
+	      node,
+	      groupLength = group.length,
+	      dataLength = data.length; // Put any non-null nodes that fit into update.
+	  // Put any null nodes into enter.
+	  // Put any remaining data into enter.
 
-	    projection.transform = function(obj) {
-	        if (!arguments.length) { return identity$2.translate(x, y).scale(k); }
-	        x = +obj.x;
-	        y = +obj.y;
-	        k = +obj.k;
-	        return projection;
-	    };
+	  for (; i < dataLength; ++i) {
+	    if (node = group[i]) {
+	      node.__data__ = data[i];
+	      update[i] = node;
+	    } else {
+	      enter[i] = new EnterNode(parent, data[i]);
+	    }
+	  } // Put any non-null nodes that don’t fit into exit.
 
 
-	    projection.stream = d3_geoTransform({
-	        point: function(x, y) {
-	            var vec = projection([x, y]);
-	            this.stream.point(vec[0], vec[1]);
-	        }
-	    }).stream;
+	  for (; i < groupLength; ++i) {
+	    if (node = group[i]) {
+	      exit[i] = node;
+	    }
+	  }
+	}
 
+	function bindKey(parent, group, enter, update, exit, data, key) {
+	  var i,
+	      node,
+	      nodeByKeyValue = new Map(),
+	      groupLength = group.length,
+	      dataLength = data.length,
+	      keyValues = new Array(groupLength),
+	      keyValue; // Compute the key for each node.
+	  // If multiple nodes have the same key, the duplicates are added to exit.
 
-	    return projection;
-	}
+	  for (i = 0; i < groupLength; ++i) {
+	    if (node = group[i]) {
+	      keyValues[i] = keyValue = key.call(node, node.__data__, i, group) + "";
 
-	function geoOrthoNormalizedDotProduct(a, b, origin) {
-	    if (geoVecEqual(origin, a) || geoVecEqual(origin, b)) {
-	        return 1;  // coincident points, treat as straight and try to remove
+	      if (nodeByKeyValue.has(keyValue)) {
+	        exit[i] = node;
+	      } else {
+	        nodeByKeyValue.set(keyValue, node);
+	      }
 	    }
-	    return geoVecNormalizedDot(a, b, origin);
-	}
+	  } // Compute the key for each datum.
+	  // If there a node associated with this key, join and add it to update.
+	  // If there is not (or the key is a duplicate), add it to enter.
 
 
-	function geoOrthoFilterDotProduct(dotp, epsilon, lowerThreshold, upperThreshold, allowStraightAngles) {
-	    var val = Math.abs(dotp);
-	    if (val < epsilon) {
-	        return 0;      // already orthogonal
-	    } else if (allowStraightAngles && Math.abs(val-1) < epsilon) {
-	        return 0;      // straight angle, which is okay in this case
-	    } else if (val < lowerThreshold || val > upperThreshold) {
-	        return dotp;   // can be adjusted
+	  for (i = 0; i < dataLength; ++i) {
+	    keyValue = key.call(parent, data[i], i, data) + "";
+
+	    if (node = nodeByKeyValue.get(keyValue)) {
+	      update[i] = node;
+	      node.__data__ = data[i];
+	      nodeByKeyValue["delete"](keyValue);
 	    } else {
-	        return null;   // ignore vertex
+	      enter[i] = new EnterNode(parent, data[i]);
+	    }
+	  } // Add any remaining nodes that were not bound to data to exit.
+
+
+	  for (i = 0; i < groupLength; ++i) {
+	    if ((node = group[i]) && nodeByKeyValue.get(keyValues[i]) === node) {
+	      exit[i] = node;
 	    }
+	  }
 	}
 
+	function datum(node) {
+	  return node.__data__;
+	}
 
-	function geoOrthoCalcScore(points, isClosed, epsilon, threshold) {
-	    var score = 0;
-	    var first = isClosed ? 0 : 1;
-	    var last = isClosed ? points.length : points.length - 1;
-	    var coords = points.map(function(p) { return p.coord; });
+	function selection_data (value, key) {
+	  if (!arguments.length) return Array.from(this, datum);
+	  var bind = key ? bindKey : bindIndex,
+	      parents = this._parents,
+	      groups = this._groups;
+	  if (typeof value !== "function") value = constant$3(value);
+
+	  for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {
+	    var parent = parents[j],
+	        group = groups[j],
+	        groupLength = group.length,
+	        data = array(value.call(parent, parent && parent.__data__, j, parents)),
+	        dataLength = data.length,
+	        enterGroup = enter[j] = new Array(dataLength),
+	        updateGroup = update[j] = new Array(dataLength),
+	        exitGroup = exit[j] = new Array(groupLength);
+	    bind(parent, group, enterGroup, updateGroup, exitGroup, data, key); // Now connect the enter nodes to their following update node, such that
+	    // appendChild can insert the materialized enter node before this node,
+	    // rather than at the end of the parent node.
 
-	    var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
-	    var upperThreshold = Math.cos(threshold * Math.PI / 180);
+	    for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {
+	      if (previous = enterGroup[i0]) {
+	        if (i0 >= i1) i1 = i0 + 1;
 
-	    for (var i = first; i < last; i++) {
-	        var a = coords[(i - 1 + coords.length) % coords.length];
-	        var origin = coords[i];
-	        var b = coords[(i + 1) % coords.length];
+	        while (!(next = updateGroup[i1]) && ++i1 < dataLength) {
+	        }
 
-	        var dotp = geoOrthoFilterDotProduct(geoOrthoNormalizedDotProduct(a, b, origin), epsilon, lowerThreshold, upperThreshold);
-	        if (dotp === null) { continue; }    // ignore vertex
-	        score = score + 2.0 * Math.min(Math.abs(dotp - 1.0), Math.min(Math.abs(dotp), Math.abs(dotp + 1)));
+	        previous._next = next || null;
+	      }
 	    }
+	  }
 
-	    return score;
+	  update = new Selection$1(update, parents);
+	  update._enter = enter;
+	  update._exit = exit;
+	  return update;
 	}
 
-	// returns the maximum angle less than `lessThan` between the actual corner and a 0° or 90° corner
-	function geoOrthoMaxOffsetAngle(coords, isClosed, lessThan) {
-	    var max = -Infinity;
+	function selection_exit () {
+	  return new Selection$1(this._exit || this._groups.map(sparse), this._parents);
+	}
 
-	    var first = isClosed ? 0 : 1;
-	    var last = isClosed ? coords.length : coords.length - 1;
+	function selection_join (onenter, onupdate, onexit) {
+	  var enter = this.enter(),
+	      update = this,
+	      exit = this.exit();
+	  enter = typeof onenter === "function" ? onenter(enter) : enter.append(onenter + "");
+	  if (onupdate != null) update = onupdate(update);
+	  if (onexit == null) exit.remove();else onexit(exit);
+	  return enter && update ? enter.merge(update).order() : update;
+	}
 
-	    for (var i = first; i < last; i++) {
-	        var a = coords[(i - 1 + coords.length) % coords.length];
-	        var origin = coords[i];
-	        var b = coords[(i + 1) % coords.length];
-	        var normalizedDotP = geoOrthoNormalizedDotProduct(a, b, origin);
+	function selection_merge (selection) {
+	  if (!(selection instanceof Selection$1)) throw new Error("invalid merge");
 
-	        var angle = Math.acos(Math.abs(normalizedDotP)) * 180 / Math.PI;
+	  for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
+	    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
+	      if (node = group0[i] || group1[i]) {
+	        merge[i] = node;
+	      }
+	    }
+	  }
 
-	        if (angle > 45) { angle = 90 - angle; }
+	  for (; j < m0; ++j) {
+	    merges[j] = groups0[j];
+	  }
 
-	        if (angle >= lessThan) { continue; }
+	  return new Selection$1(merges, this._parents);
+	}
 
-	        if (angle > max) { max = angle; }
+	function selection_order () {
+	  for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {
+	    for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {
+	      if (node = group[i]) {
+	        if (next && node.compareDocumentPosition(next) ^ 4) next.parentNode.insertBefore(node, next);
+	        next = node;
+	      }
 	    }
+	  }
 
-	    if (max === -Infinity) { return null; }
-
-	    return max;
+	  return this;
 	}
 
+	function selection_sort (compare) {
+	  if (!compare) compare = ascending;
 
-	// similar to geoOrthoCalcScore, but returns quickly if there is something to do
-	function geoOrthoCanOrthogonalize(coords, isClosed, epsilon, threshold, allowStraightAngles) {
-	    var score = null;
-	    var first = isClosed ? 0 : 1;
-	    var last = isClosed ? coords.length : coords.length - 1;
+	  function compareNode(a, b) {
+	    return a && b ? compare(a.__data__, b.__data__) : !a - !b;
+	  }
+
+	  for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) {
+	      if (node = group[i]) {
+	        sortgroup[i] = node;
+	      }
+	    }
 
-	    var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
-	    var upperThreshold = Math.cos(threshold * Math.PI / 180);
+	    sortgroup.sort(compareNode);
+	  }
 
-	    for (var i = first; i < last; i++) {
-	        var a = coords[(i - 1 + coords.length) % coords.length];
-	        var origin = coords[i];
-	        var b = coords[(i + 1) % coords.length];
+	  return new Selection$1(sortgroups, this._parents).order();
+	}
 
-	        var dotp = geoOrthoFilterDotProduct(geoOrthoNormalizedDotProduct(a, b, origin), epsilon, lowerThreshold, upperThreshold, allowStraightAngles);
-	        if (dotp === null) { continue; }        // ignore vertex
-	        if (Math.abs(dotp) > 0) { return 1; }   // something to do
-	        score = 0;                          // already square
-	    }
+	function ascending(a, b) {
+	  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
+	}
 
-	    return score;
+	function selection_call () {
+	  var callback = arguments[0];
+	  arguments[0] = this;
+	  callback.apply(null, arguments);
+	  return this;
 	}
 
-	// Returns true if a and b have the same elements at the same indices.
-	function utilArrayIdentical(a, b) {
-	    // an array is always identical to itself
-	    if (a === b) { return true; }
+	function selection_nodes () {
+	  return Array.from(this);
+	}
 
-	    var i = a.length;
-	    if (i !== b.length) { return false; }
-	    while (i--) {
-	        if (a[i] !== b[i]) { return false; }
+	function selection_node () {
+	  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
+	    for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {
+	      var node = group[i];
+	      if (node) return node;
 	    }
-	    return true;
+	  }
+
+	  return null;
 	}
 
-	// http://2ality.com/2015/01/es6-set-operations.html
+	function selection_size () {
+	  var size = 0;
 
-	// Difference (a \ b): create a set that contains those elements of set a that are not in set b.
-	// This operation is also sometimes called minus (-).
-	// var a = [1,2,3];
-	// var b = [4,3,2];
-	// utilArrayDifference(a, b)
-	//   [1]
-	// utilArrayDifference(b, a)
-	//   [4]
-	function utilArrayDifference(a, b) {
-	    var other = new Set(b);
-	    return Array.from(new Set(a))
-	        .filter(function(v) { return !other.has(v); });
+	  var _iterator = _createForOfIteratorHelper(this),
+	      _step;
+
+	  try {
+	    for (_iterator.s(); !(_step = _iterator.n()).done;) {
+	      var node = _step.value;
+	      ++size;
+	    } // eslint-disable-line no-unused-vars
+
+	  } catch (err) {
+	    _iterator.e(err);
+	  } finally {
+	    _iterator.f();
+	  }
+
+	  return size;
 	}
 
-	// Intersection (a ∩ b): create a set that contains those elements of set a that are also in set b.
-	// var a = [1,2,3];
-	// var b = [4,3,2];
-	// utilArrayIntersection(a, b)
-	//   [2,3]
-	function utilArrayIntersection(a, b) {
-	    var other = new Set(b);
-	    return Array.from(new Set(a))
-	        .filter(function(v) { return other.has(v); });
+	function selection_empty () {
+	  return !this.node();
 	}
 
-	// Union (a ∪ b): create a set that contains the elements of both set a and set b.
-	// var a = [1,2,3];
-	// var b = [4,3,2];
-	// utilArrayUnion(a, b)
-	//   [1,2,3,4]
-	function utilArrayUnion(a, b) {
-	    var result = new Set(a);
-	    b.forEach(function(v) { result.add(v); });
-	    return Array.from(result);
+	function selection_each (callback) {
+	  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
+	    for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {
+	      if (node = group[i]) callback.call(node, node.__data__, i, group);
+	    }
+	  }
+
+	  return this;
 	}
 
-	// Returns an Array with all the duplicates removed
-	// var a = [1,1,2,3,3];
-	// utilArrayUniq(a)
-	//   [1,2,3]
-	function utilArrayUniq(a) {
-	    return Array.from(new Set(a));
+	function attrRemove$1(name) {
+	  return function () {
+	    this.removeAttribute(name);
+	  };
 	}
 
+	function attrRemoveNS$1(fullname) {
+	  return function () {
+	    this.removeAttributeNS(fullname.space, fullname.local);
+	  };
+	}
 
-	// Splits array into chunks of given chunk size
-	// var a = [1,2,3,4,5,6,7];
-	// utilArrayChunk(a, 3);
-	//   [[1,2,3],[4,5,6],[7]];
-	function utilArrayChunk(a, chunkSize) {
-	    if (!chunkSize || chunkSize < 0) { return [a.slice()]; }
+	function attrConstant$1(name, value) {
+	  return function () {
+	    this.setAttribute(name, value);
+	  };
+	}
 
-	    var result = new Array(Math.ceil(a.length / chunkSize));
-	    return Array.from(result, function(item, i) {
-	        return a.slice(i * chunkSize, i * chunkSize + chunkSize);
-	    });
+	function attrConstantNS$1(fullname, value) {
+	  return function () {
+	    this.setAttributeNS(fullname.space, fullname.local, value);
+	  };
 	}
 
+	function attrFunction$1(name, value) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    if (v == null) this.removeAttribute(name);else this.setAttribute(name, v);
+	  };
+	}
 
-	// Flattens two level array into a single level
-	// var a = [[1,2,3],[4,5,6],[7]];
-	// utilArrayFlatten(a);
-	//   [1,2,3,4,5,6,7];
-	function utilArrayFlatten(a) {
-	    return a.reduce(function(acc, val) {
-	        return acc.concat(val);
-	    }, []);
+	function attrFunctionNS$1(fullname, value) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    if (v == null) this.removeAttributeNS(fullname.space, fullname.local);else this.setAttributeNS(fullname.space, fullname.local, v);
+	  };
 	}
 
+	function selection_attr (name, value) {
+	  var fullname = namespace(name);
 
-	// Groups the items of the Array according to the given key
-	// `key` can be passed as a property or as a key function
-	//
-	// var pets = [
-	//     { type: 'Dog', name: 'Spot' },
-	//     { type: 'Cat', name: 'Tiger' },
-	//     { type: 'Dog', name: 'Rover' },
-	//     { type: 'Cat', name: 'Leo' }
-	// ];
-	//
-	// utilArrayGroupBy(pets, 'type')
-	//   {
-	//     'Dog': [{type: 'Dog', name: 'Spot'}, {type: 'Dog', name: 'Rover'}],
-	//     'Cat': [{type: 'Cat', name: 'Tiger'}, {type: 'Cat', name: 'Leo'}]
-	//   }
-	//
-	// utilArrayGroupBy(pets, function(item) { return item.name.length; })
-	//   {
-	//     3: [{type: 'Cat', name: 'Leo'}],
-	//     4: [{type: 'Dog', name: 'Spot'}],
-	//     5: [{type: 'Cat', name: 'Tiger'}, {type: 'Dog', name: 'Rover'}]
-	//   }
-	function utilArrayGroupBy(a, key) {
-	    return a.reduce(function(acc, item) {
-	        var group = (typeof key === 'function') ? key(item) : item[key];
-	        (acc[group] = acc[group] || []).push(item);
-	        return acc;
-	    }, {});
+	  if (arguments.length < 2) {
+	    var node = this.node();
+	    return fullname.local ? node.getAttributeNS(fullname.space, fullname.local) : node.getAttribute(fullname);
+	  }
+
+	  return this.each((value == null ? fullname.local ? attrRemoveNS$1 : attrRemove$1 : typeof value === "function" ? fullname.local ? attrFunctionNS$1 : attrFunction$1 : fullname.local ? attrConstantNS$1 : attrConstant$1)(fullname, value));
 	}
 
+	function defaultView (node) {
+	  return node.ownerDocument && node.ownerDocument.defaultView || // node is a Node
+	  node.document && node // node is a Window
+	  || node.defaultView; // node is a Document
+	}
 
-	// Returns an Array with all the duplicates removed
-	// where uniqueness determined by the given key
-	// `key` can be passed as a property or as a key function
-	//
-	// var pets = [
-	//     { type: 'Dog', name: 'Spot' },
-	//     { type: 'Cat', name: 'Tiger' },
-	//     { type: 'Dog', name: 'Rover' },
-	//     { type: 'Cat', name: 'Leo' }
-	// ];
-	//
-	// utilArrayUniqBy(pets, 'type')
-	//   [
-	//     { type: 'Dog', name: 'Spot' },
-	//     { type: 'Cat', name: 'Tiger' }
-	//   ]
-	//
-	// utilArrayUniqBy(pets, function(item) { return item.name.length; })
-	//   [
-	//     { type: 'Dog', name: 'Spot' },
-	//     { type: 'Cat', name: 'Tiger' },
-	//     { type: 'Cat', name: 'Leo' }
-	//   }
-	function utilArrayUniqBy(a, key) {
-	    var seen = new Set();
-	    return a.reduce(function(acc, item) {
-	        var val = (typeof key === 'function') ? key(item) : item[key];
-	        if (val && !seen.has(val)) {
-	            seen.add(val);
-	            acc.push(item);
-	        }
-	        return acc;
-	    }, []);
+	function styleRemove$1(name) {
+	  return function () {
+	    this.style.removeProperty(name);
+	  };
 	}
 
-	var remove$1 = removeDiacritics;
+	function styleConstant$1(name, value, priority) {
+	  return function () {
+	    this.style.setProperty(name, value, priority);
+	  };
+	}
 
-	var replacementList = [
-	  {
-	    base: ' ',
-	    chars: "\u00A0",
-	  }, {
-	    base: '0',
-	    chars: "\u07C0",
-	  }, {
-	    base: 'A',
-	    chars: "\u24B6\uFF21\u00C0\u00C1\u00C2\u1EA6\u1EA4\u1EAA\u1EA8\u00C3\u0100\u0102\u1EB0\u1EAE\u1EB4\u1EB2\u0226\u01E0\u00C4\u01DE\u1EA2\u00C5\u01FA\u01CD\u0200\u0202\u1EA0\u1EAC\u1EB6\u1E00\u0104\u023A\u2C6F",
-	  }, {
-	    base: 'AA',
-	    chars: "\uA732",
-	  }, {
-	    base: 'AE',
-	    chars: "\u00C6\u01FC\u01E2",
-	  }, {
-	    base: 'AO',
-	    chars: "\uA734",
-	  }, {
-	    base: 'AU',
-	    chars: "\uA736",
-	  }, {
-	    base: 'AV',
-	    chars: "\uA738\uA73A",
-	  }, {
-	    base: 'AY',
-	    chars: "\uA73C",
-	  }, {
-	    base: 'B',
-	    chars: "\u24B7\uFF22\u1E02\u1E04\u1E06\u0243\u0181",
-	  }, {
-	    base: 'C',
-	    chars: "\u24b8\uff23\uA73E\u1E08\u0106\u0043\u0108\u010A\u010C\u00C7\u0187\u023B",
-	  }, {
-	    base: 'D',
-	    chars: "\u24B9\uFF24\u1E0A\u010E\u1E0C\u1E10\u1E12\u1E0E\u0110\u018A\u0189\u1D05\uA779",
-	  }, {
-	    base: 'Dh',
-	    chars: "\u00D0",
-	  }, {
-	    base: 'DZ',
-	    chars: "\u01F1\u01C4",
-	  }, {
-	    base: 'Dz',
-	    chars: "\u01F2\u01C5",
-	  }, {
-	    base: 'E',
-	    chars: "\u025B\u24BA\uFF25\u00C8\u00C9\u00CA\u1EC0\u1EBE\u1EC4\u1EC2\u1EBC\u0112\u1E14\u1E16\u0114\u0116\u00CB\u1EBA\u011A\u0204\u0206\u1EB8\u1EC6\u0228\u1E1C\u0118\u1E18\u1E1A\u0190\u018E\u1D07",
-	  }, {
-	    base: 'F',
-	    chars: "\uA77C\u24BB\uFF26\u1E1E\u0191\uA77B",
-	  }, {
-	    base: 'G',
-	    chars: "\u24BC\uFF27\u01F4\u011C\u1E20\u011E\u0120\u01E6\u0122\u01E4\u0193\uA7A0\uA77D\uA77E\u0262",
-	  }, {
-	    base: 'H',
-	    chars: "\u24BD\uFF28\u0124\u1E22\u1E26\u021E\u1E24\u1E28\u1E2A\u0126\u2C67\u2C75\uA78D",
-	  }, {
-	    base: 'I',
-	    chars: "\u24BE\uFF29\xCC\xCD\xCE\u0128\u012A\u012C\u0130\xCF\u1E2E\u1EC8\u01CF\u0208\u020A\u1ECA\u012E\u1E2C\u0197",
-	  }, {
-	    base: 'J',
-	    chars: "\u24BF\uFF2A\u0134\u0248\u0237",
-	  }, {
-	    base: 'K',
-	    chars: "\u24C0\uFF2B\u1E30\u01E8\u1E32\u0136\u1E34\u0198\u2C69\uA740\uA742\uA744\uA7A2",
-	  }, {
-	    base: 'L',
-	    chars: "\u24C1\uFF2C\u013F\u0139\u013D\u1E36\u1E38\u013B\u1E3C\u1E3A\u0141\u023D\u2C62\u2C60\uA748\uA746\uA780",
-	  }, {
-	    base: 'LJ',
-	    chars: "\u01C7",
-	  }, {
-	    base: 'Lj',
-	    chars: "\u01C8",
-	  }, {
-	    base: 'M',
-	    chars: "\u24C2\uFF2D\u1E3E\u1E40\u1E42\u2C6E\u019C\u03FB",
-	  }, {
-	    base: 'N',
-	    chars: "\uA7A4\u0220\u24C3\uFF2E\u01F8\u0143\xD1\u1E44\u0147\u1E46\u0145\u1E4A\u1E48\u019D\uA790\u1D0E",
-	  }, {
-	    base: 'NJ',
-	    chars: "\u01CA",
-	  }, {
-	    base: 'Nj',
-	    chars: "\u01CB",
-	  }, {
-	    base: 'O',
-	    chars: "\u24C4\uFF2F\xD2\xD3\xD4\u1ED2\u1ED0\u1ED6\u1ED4\xD5\u1E4C\u022C\u1E4E\u014C\u1E50\u1E52\u014E\u022E\u0230\xD6\u022A\u1ECE\u0150\u01D1\u020C\u020E\u01A0\u1EDC\u1EDA\u1EE0\u1EDE\u1EE2\u1ECC\u1ED8\u01EA\u01EC\xD8\u01FE\u0186\u019F\uA74A\uA74C",
-	  }, {
-	    base: 'OE',
-	    chars: "\u0152",
-	  }, {
-	    base: 'OI',
-	    chars: "\u01A2",
-	  }, {
-	    base: 'OO',
-	    chars: "\uA74E",
-	  }, {
-	    base: 'OU',
-	    chars: "\u0222",
-	  }, {
-	    base: 'P',
-	    chars: "\u24C5\uFF30\u1E54\u1E56\u01A4\u2C63\uA750\uA752\uA754",
-	  }, {
-	    base: 'Q',
-	    chars: "\u24C6\uFF31\uA756\uA758\u024A",
-	  }, {
-	    base: 'R',
-	    chars: "\u24C7\uFF32\u0154\u1E58\u0158\u0210\u0212\u1E5A\u1E5C\u0156\u1E5E\u024C\u2C64\uA75A\uA7A6\uA782",
-	  }, {
-	    base: 'S',
-	    chars: "\u24C8\uFF33\u1E9E\u015A\u1E64\u015C\u1E60\u0160\u1E66\u1E62\u1E68\u0218\u015E\u2C7E\uA7A8\uA784",
-	  }, {
-	    base: 'T',
-	    chars: "\u24C9\uFF34\u1E6A\u0164\u1E6C\u021A\u0162\u1E70\u1E6E\u0166\u01AC\u01AE\u023E\uA786",
-	  }, {
-	    base: 'Th',
-	    chars: "\u00DE",
-	  }, {
-	    base: 'TZ',
-	    chars: "\uA728",
-	  }, {
-	    base: 'U',
-	    chars: "\u24CA\uFF35\xD9\xDA\xDB\u0168\u1E78\u016A\u1E7A\u016C\xDC\u01DB\u01D7\u01D5\u01D9\u1EE6\u016E\u0170\u01D3\u0214\u0216\u01AF\u1EEA\u1EE8\u1EEE\u1EEC\u1EF0\u1EE4\u1E72\u0172\u1E76\u1E74\u0244",
-	  }, {
-	    base: 'V',
-	    chars: "\u24CB\uFF36\u1E7C\u1E7E\u01B2\uA75E\u0245",
-	  }, {
-	    base: 'VY',
-	    chars: "\uA760",
-	  }, {
-	    base: 'W',
-	    chars: "\u24CC\uFF37\u1E80\u1E82\u0174\u1E86\u1E84\u1E88\u2C72",
-	  }, {
-	    base: 'X',
-	    chars: "\u24CD\uFF38\u1E8A\u1E8C",
-	  }, {
-	    base: 'Y',
-	    chars: "\u24CE\uFF39\u1EF2\xDD\u0176\u1EF8\u0232\u1E8E\u0178\u1EF6\u1EF4\u01B3\u024E\u1EFE",
-	  }, {
-	    base: 'Z',
-	    chars: "\u24CF\uFF3A\u0179\u1E90\u017B\u017D\u1E92\u1E94\u01B5\u0224\u2C7F\u2C6B\uA762",
-	  }, {
-	    base: 'a',
-	    chars: "\u24D0\uFF41\u1E9A\u00E0\u00E1\u00E2\u1EA7\u1EA5\u1EAB\u1EA9\u00E3\u0101\u0103\u1EB1\u1EAF\u1EB5\u1EB3\u0227\u01E1\u00E4\u01DF\u1EA3\u00E5\u01FB\u01CE\u0201\u0203\u1EA1\u1EAD\u1EB7\u1E01\u0105\u2C65\u0250\u0251",
-	  }, {
-	    base: 'aa',
-	    chars: "\uA733",
-	  }, {
-	    base: 'ae',
-	    chars: "\u00E6\u01FD\u01E3",
-	  }, {
-	    base: 'ao',
-	    chars: "\uA735",
-	  }, {
-	    base: 'au',
-	    chars: "\uA737",
-	  }, {
-	    base: 'av',
-	    chars: "\uA739\uA73B",
-	  }, {
-	    base: 'ay',
-	    chars: "\uA73D",
-	  }, {
-	    base: 'b',
-	    chars: "\u24D1\uFF42\u1E03\u1E05\u1E07\u0180\u0183\u0253\u0182",
-	  }, {
-	    base: 'c',
-	    chars: "\uFF43\u24D2\u0107\u0109\u010B\u010D\u00E7\u1E09\u0188\u023C\uA73F\u2184",
-	  }, {
-	    base: 'd',
-	    chars: "\u24D3\uFF44\u1E0B\u010F\u1E0D\u1E11\u1E13\u1E0F\u0111\u018C\u0256\u0257\u018B\u13E7\u0501\uA7AA",
-	  }, {
-	    base: 'dh',
-	    chars: "\u00F0",
-	  }, {
-	    base: 'dz',
-	    chars: "\u01F3\u01C6",
-	  }, {
-	    base: 'e',
-	    chars: "\u24D4\uFF45\u00E8\u00E9\u00EA\u1EC1\u1EBF\u1EC5\u1EC3\u1EBD\u0113\u1E15\u1E17\u0115\u0117\u00EB\u1EBB\u011B\u0205\u0207\u1EB9\u1EC7\u0229\u1E1D\u0119\u1E19\u1E1B\u0247\u01DD",
-	  }, {
-	    base: 'f',
-	    chars: "\u24D5\uFF46\u1E1F\u0192",
-	  }, {
-	    base: 'ff',
-	    chars: "\uFB00",
-	  }, {
-	    base: 'fi',
-	    chars: "\uFB01",
-	  }, {
-	    base: 'fl',
-	    chars: "\uFB02",
-	  }, {
-	    base: 'ffi',
-	    chars: "\uFB03",
-	  }, {
-	    base: 'ffl',
-	    chars: "\uFB04",
-	  }, {
-	    base: 'g',
-	    chars: "\u24D6\uFF47\u01F5\u011D\u1E21\u011F\u0121\u01E7\u0123\u01E5\u0260\uA7A1\uA77F\u1D79",
-	  }, {
-	    base: 'h',
-	    chars: "\u24D7\uFF48\u0125\u1E23\u1E27\u021F\u1E25\u1E29\u1E2B\u1E96\u0127\u2C68\u2C76\u0265",
-	  }, {
-	    base: 'hv',
-	    chars: "\u0195",
-	  }, {
-	    base: 'i',
-	    chars: "\u24D8\uFF49\xEC\xED\xEE\u0129\u012B\u012D\xEF\u1E2F\u1EC9\u01D0\u0209\u020B\u1ECB\u012F\u1E2D\u0268\u0131",
-	  }, {
-	    base: 'j',
-	    chars: "\u24D9\uFF4A\u0135\u01F0\u0249",
-	  }, {
-	    base: 'k',
-	    chars: "\u24DA\uFF4B\u1E31\u01E9\u1E33\u0137\u1E35\u0199\u2C6A\uA741\uA743\uA745\uA7A3",
-	  }, {
-	    base: 'l',
-	    chars: "\u24DB\uFF4C\u0140\u013A\u013E\u1E37\u1E39\u013C\u1E3D\u1E3B\u017F\u0142\u019A\u026B\u2C61\uA749\uA781\uA747\u026D",
-	  }, {
-	    base: 'lj',
-	    chars: "\u01C9",
-	  }, {
-	    base: 'm',
-	    chars: "\u24DC\uFF4D\u1E3F\u1E41\u1E43\u0271\u026F",
-	  }, {
-	    base: 'n',
-	    chars: "\u24DD\uFF4E\u01F9\u0144\xF1\u1E45\u0148\u1E47\u0146\u1E4B\u1E49\u019E\u0272\u0149\uA791\uA7A5\u043B\u0509",
-	  }, {
-	    base: 'nj',
-	    chars: "\u01CC",
-	  }, {
-	    base: 'o',
-	    chars: "\u24DE\uFF4F\xF2\xF3\xF4\u1ED3\u1ED1\u1ED7\u1ED5\xF5\u1E4D\u022D\u1E4F\u014D\u1E51\u1E53\u014F\u022F\u0231\xF6\u022B\u1ECF\u0151\u01D2\u020D\u020F\u01A1\u1EDD\u1EDB\u1EE1\u1EDF\u1EE3\u1ECD\u1ED9\u01EB\u01ED\xF8\u01FF\uA74B\uA74D\u0275\u0254\u1D11",
-	  }, {
-	    base: 'oe',
-	    chars: "\u0153",
-	  }, {
-	    base: 'oi',
-	    chars: "\u01A3",
-	  }, {
-	    base: 'oo',
-	    chars: "\uA74F",
-	  }, {
-	    base: 'ou',
-	    chars: "\u0223",
-	  }, {
-	    base: 'p',
-	    chars: "\u24DF\uFF50\u1E55\u1E57\u01A5\u1D7D\uA751\uA753\uA755\u03C1",
-	  }, {
-	    base: 'q',
-	    chars: "\u24E0\uFF51\u024B\uA757\uA759",
-	  }, {
-	    base: 'r',
-	    chars: "\u24E1\uFF52\u0155\u1E59\u0159\u0211\u0213\u1E5B\u1E5D\u0157\u1E5F\u024D\u027D\uA75B\uA7A7\uA783",
-	  }, {
-	    base: 's',
-	    chars: "\u24E2\uFF53\u015B\u1E65\u015D\u1E61\u0161\u1E67\u1E63\u1E69\u0219\u015F\u023F\uA7A9\uA785\u1E9B\u0282",
-	  }, {
-	    base: 'ss',
-	    chars: "\xDF",
-	  }, {
-	    base: 't',
-	    chars: "\u24E3\uFF54\u1E6B\u1E97\u0165\u1E6D\u021B\u0163\u1E71\u1E6F\u0167\u01AD\u0288\u2C66\uA787",
-	  }, {
-	    base: 'th',
-	    chars: "\u00FE",
-	  }, {
-	    base: 'tz',
-	    chars: "\uA729",
-	  }, {
-	    base: 'u',
-	    chars: "\u24E4\uFF55\xF9\xFA\xFB\u0169\u1E79\u016B\u1E7B\u016D\xFC\u01DC\u01D8\u01D6\u01DA\u1EE7\u016F\u0171\u01D4\u0215\u0217\u01B0\u1EEB\u1EE9\u1EEF\u1EED\u1EF1\u1EE5\u1E73\u0173\u1E77\u1E75\u0289",
-	  }, {
-	    base: 'v',
-	    chars: "\u24E5\uFF56\u1E7D\u1E7F\u028B\uA75F\u028C",
-	  }, {
-	    base: 'vy',
-	    chars: "\uA761",
-	  }, {
-	    base: 'w',
-	    chars: "\u24E6\uFF57\u1E81\u1E83\u0175\u1E87\u1E85\u1E98\u1E89\u2C73",
-	  }, {
-	    base: 'x',
-	    chars: "\u24E7\uFF58\u1E8B\u1E8D",
-	  }, {
-	    base: 'y',
-	    chars: "\u24E8\uFF59\u1EF3\xFD\u0177\u1EF9\u0233\u1E8F\xFF\u1EF7\u1E99\u1EF5\u01B4\u024F\u1EFF",
-	  }, {
-	    base: 'z',
-	    chars: "\u24E9\uFF5A\u017A\u1E91\u017C\u017E\u1E93\u1E95\u01B6\u0225\u0240\u2C6C\uA763",
-	  }
-	];
-
-	var diacriticsMap = {};
-	for (var i$1 = 0; i$1 < replacementList.length; i$1 += 1) {
-	  var chars = replacementList[i$1].chars;
-	  for (var j = 0; j < chars.length; j += 1) {
-	    diacriticsMap[chars[j]] = replacementList[i$1].base;
-	  }
-	}
-
-	function removeDiacritics(str) {
-	  return str.replace(/[^\u0000-\u007e]/g, function(c) {
-	    return diacriticsMap[c] || c;
-	  });
-	}
-
-	var replacementList_1 = replacementList;
-	var diacriticsMap_1 = diacriticsMap;
-
-	var diacritics = {
-		remove: remove$1,
-		replacementList: replacementList_1,
-		diacriticsMap: diacriticsMap_1
-	};
-
-	var isArabic_1 = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-	var arabicBlocks = [
-	    [0x0600, 0x06FF],
-	    [0x0750, 0x077F],
-	    [0x08A0, 0x08FF],
-	    [0xFB50, 0xFDFF],
-	    [0xFE70, 0xFEFF],
-	    [0x10E60, 0x10E7F],
-	    [0x1EC70, 0x1ECBF],
-	    [0x1EE00, 0x1EEFF] // Mathematical Alphabetic symbols https://www.unicode.org/charts/PDF/U1EE00.pdf
-	];
-	function isArabic(char) {
-	    if (char.length > 1) {
-	        // allow the newer chars?
-	        throw new Error('isArabic works on only one-character strings');
-	    }
-	    var code = char.charCodeAt(0);
-	    for (var i = 0; i < arabicBlocks.length; i++) {
-	        var block = arabicBlocks[i];
-	        if (code >= block[0] && code <= block[1]) {
-	            return true;
-	        }
-	    }
-	    return false;
-	}
-	exports.isArabic = isArabic;
-	function isMath(char) {
-	    if (char.length > 2) {
-	        // allow the newer chars?
-	        throw new Error('isMath works on only one-character strings');
-	    }
-	    var code = char.charCodeAt(0);
-	    return ((code >= 0x660 && code <= 0x66C) || (code >= 0x6F0 && code <= 0x6F9));
-	}
-	exports.isMath = isMath;
-	});
-
-	var unicodeArabic = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-	var arabicReference = {
-	    "alef": {
-	        "normal": [
-	            "\u0627"
-	        ],
-	        "madda_above": {
-	            "normal": [
-	                "\u0627\u0653",
-	                "\u0622"
-	            ],
-	            "isolated": "\uFE81",
-	            "final": "\uFE82"
-	        },
-	        "hamza_above": {
-	            "normal": [
-	                "\u0627\u0654",
-	                "\u0623"
-	            ],
-	            "isolated": "\uFE83",
-	            "final": "\uFE84"
-	        },
-	        "hamza_below": {
-	            "normal": [
-	                "\u0627\u0655",
-	                "\u0625"
-	            ],
-	            "isolated": "\uFE87",
-	            "final": "\uFE88"
-	        },
-	        "wasla": {
-	            "normal": "\u0671",
-	            "isolated": "\uFB50",
-	            "final": "\uFB51"
-	        },
-	        "wavy_hamza_above": [
-	            "\u0672"
-	        ],
-	        "wavy_hamza_below": [
-	            "\u0627\u065F",
-	            "\u0673"
-	        ],
-	        "high_hamza": [
-	            "\u0675",
-	            "\u0627\u0674"
-	        ],
-	        "indic_two_above": [
-	            "\u0773"
-	        ],
-	        "indic_three_above": [
-	            "\u0774"
-	        ],
-	        "fathatan": {
-	            "normal": [
-	                "\u0627\u064B"
-	            ],
-	            "final": "\uFD3C",
-	            "isolated": "\uFD3D"
-	        },
-	        "isolated": "\uFE8D",
-	        "final": "\uFE8E"
-	    },
-	    "beh": {
-	        "normal": [
-	            "\u0628"
-	        ],
-	        "dotless": [
-	            "\u066E"
-	        ],
-	        "three_dots_horizontally_below": [
-	            "\u0750"
-	        ],
-	        "dot_below_three_dots_above": [
-	            "\u0751"
-	        ],
-	        "three_dots_pointing_upwards_below": [
-	            "\u0752"
-	        ],
-	        "three_dots_pointing_upwards_below_two_dots_above": [
-	            "\u0753"
-	        ],
-	        "two_dots_below_dot_above": [
-	            "\u0754"
-	        ],
-	        "inverted_small_v_below": [
-	            "\u0755"
-	        ],
-	        "small_v": [
-	            "\u0756"
-	        ],
-	        "small_v_below": [
-	            "\u08A0"
-	        ],
-	        "hamza_above": [
-	            "\u08A1"
-	        ],
-	        "small_meem_above": [
-	            "\u08B6"
-	        ],
-	        "isolated": "\uFE8F",
-	        "final": "\uFE90",
-	        "initial": "\uFE91",
-	        "medial": "\uFE92"
-	    },
-	    "teh marbuta": {
-	        "normal": [
-	            "\u0629"
-	        ],
-	        "isolated": "\uFE93",
-	        "final": "\uFE94"
-	    },
-	    "teh": {
-	        "normal": [
-	            "\u062A"
-	        ],
-	        "ring": [
-	            "\u067C"
-	        ],
-	        "three_dots_above_downwards": [
-	            "\u067D"
-	        ],
-	        "small_teh_above": [
-	            "\u08B8"
-	        ],
-	        "isolated": "\uFE95",
-	        "final": "\uFE96",
-	        "initial": "\uFE97",
-	        "medial": "\uFE98"
-	    },
-	    "theh": {
-	        "normal": [
-	            "\u062B"
-	        ],
-	        "isolated": "\uFE99",
-	        "final": "\uFE9A",
-	        "initial": "\uFE9B",
-	        "medial": "\uFE9C"
-	    },
-	    "jeem": {
-	        "normal": [
-	            "\u062C"
-	        ],
-	        "two_dots_above": [
-	            "\u08A2"
-	        ],
-	        "isolated": "\uFE9D",
-	        "final": "\uFE9E",
-	        "initial": "\uFE9F",
-	        "medial": "\uFEA0"
-	    },
-	    "hah": {
-	        "normal": [
-	            "\u062D"
-	        ],
-	        "hamza_above": [
-	            "\u0681"
-	        ],
-	        "two_dots_vertical_above": [
-	            "\u0682"
-	        ],
-	        "three_dots_above": [
-	            "\u0685"
-	        ],
-	        "two_dots_above": [
-	            "\u0757"
-	        ],
-	        "three_dots_pointing_upwards_below": [
-	            "\u0758"
-	        ],
-	        "small_tah_below": [
-	            "\u076E"
-	        ],
-	        "small_tah_two_dots": [
-	            "\u076F"
-	        ],
-	        "small_tah_above": [
-	            "\u0772"
-	        ],
-	        "indic_four_below": [
-	            "\u077C"
-	        ],
-	        "isolated": "\uFEA1",
-	        "final": "\uFEA2",
-	        "initial": "\uFEA3",
-	        "medial": "\uFEA4"
-	    },
-	    "khah": {
-	        "normal": [
-	            "\u062E"
-	        ],
-	        "isolated": "\uFEA5",
-	        "final": "\uFEA6",
-	        "initial": "\uFEA7",
-	        "medial": "\uFEA8"
-	    },
-	    "dal": {
-	        "normal": [
-	            "\u062F"
-	        ],
-	        "ring": [
-	            "\u0689"
-	        ],
-	        "dot_below": [
-	            "\u068A"
-	        ],
-	        "dot_below_small_tah": [
-	            "\u068B"
-	        ],
-	        "three_dots_above_downwards": [
-	            "\u068F"
-	        ],
-	        "four_dots_above": [
-	            "\u0690"
-	        ],
-	        "inverted_v": [
-	            "\u06EE"
-	        ],
-	        "two_dots_vertically_below_small_tah": [
-	            "\u0759"
-	        ],
-	        "inverted_small_v_below": [
-	            "\u075A"
-	        ],
-	        "three_dots_below": [
-	            "\u08AE"
-	        ],
-	        "isolated": "\uFEA9",
-	        "final": "\uFEAA"
-	    },
-	    "thal": {
-	        "normal": [
-	            "\u0630"
-	        ],
-	        "isolated": "\uFEAB",
-	        "final": "\uFEAC"
-	    },
-	    "reh": {
-	        "normal": [
-	            "\u0631"
-	        ],
-	        "small_v": [
-	            "\u0692"
-	        ],
-	        "ring": [
-	            "\u0693"
-	        ],
-	        "dot_below": [
-	            "\u0694"
-	        ],
-	        "small_v_below": [
-	            "\u0695"
-	        ],
-	        "dot_below_dot_above": [
-	            "\u0696"
-	        ],
-	        "two_dots_above": [
-	            "\u0697"
-	        ],
-	        "four_dots_above": [
-	            "\u0699"
-	        ],
-	        "inverted_v": [
-	            "\u06EF"
-	        ],
-	        "stroke": [
-	            "\u075B"
-	        ],
-	        "two_dots_vertically_above": [
-	            "\u076B"
-	        ],
-	        "hamza_above": [
-	            "\u076C"
-	        ],
-	        "small_tah_two_dots": [
-	            "\u0771"
-	        ],
-	        "loop": [
-	            "\u08AA"
-	        ],
-	        "small_noon_above": [
-	            "\u08B9"
-	        ],
-	        "isolated": "\uFEAD",
-	        "final": "\uFEAE"
-	    },
-	    "zain": {
-	        "normal": [
-	            "\u0632"
-	        ],
-	        "inverted_v_above": [
-	            "\u08B2"
-	        ],
-	        "isolated": "\uFEAF",
-	        "final": "\uFEB0"
-	    },
-	    "seen": {
-	        "normal": [
-	            "\u0633"
-	        ],
-	        "dot_below_dot_above": [
-	            "\u069A"
-	        ],
-	        "three_dots_below": [
-	            "\u069B"
-	        ],
-	        "three_dots_below_three_dots_above": [
-	            "\u069C"
-	        ],
-	        "four_dots_above": [
-	            "\u075C"
-	        ],
-	        "two_dots_vertically_above": [
-	            "\u076D"
-	        ],
-	        "small_tah_two_dots": [
-	            "\u0770"
-	        ],
-	        "indic_four_above": [
-	            "\u077D"
-	        ],
-	        "inverted_v": [
-	            "\u077E"
-	        ],
-	        "isolated": "\uFEB1",
-	        "final": "\uFEB2",
-	        "initial": "\uFEB3",
-	        "medial": "\uFEB4"
-	    },
-	    "sheen": {
-	        "normal": [
-	            "\u0634"
-	        ],
-	        "dot_below": [
-	            "\u06FA"
-	        ],
-	        "isolated": "\uFEB5",
-	        "final": "\uFEB6",
-	        "initial": "\uFEB7",
-	        "medial": "\uFEB8"
-	    },
-	    "sad": {
-	        "normal": [
-	            "\u0635"
-	        ],
-	        "two_dots_below": [
-	            "\u069D"
-	        ],
-	        "three_dots_above": [
-	            "\u069E"
-	        ],
-	        "three_dots_below": [
-	            "\u08AF"
-	        ],
-	        "isolated": "\uFEB9",
-	        "final": "\uFEBA",
-	        "initial": "\uFEBB",
-	        "medial": "\uFEBC"
-	    },
-	    "dad": {
-	        "normal": [
-	            "\u0636"
-	        ],
-	        "dot_below": [
-	            "\u06FB"
-	        ],
-	        "isolated": "\uFEBD",
-	        "final": "\uFEBE",
-	        "initial": "\uFEBF",
-	        "medial": "\uFEC0"
-	    },
-	    "tah": {
-	        "normal": [
-	            "\u0637"
-	        ],
-	        "three_dots_above": [
-	            "\u069F"
-	        ],
-	        "two_dots_above": [
-	            "\u08A3"
-	        ],
-	        "isolated": "\uFEC1",
-	        "final": "\uFEC2",
-	        "initial": "\uFEC3",
-	        "medial": "\uFEC4"
-	    },
-	    "zah": {
-	        "normal": [
-	            "\u0638"
-	        ],
-	        "isolated": "\uFEC5",
-	        "final": "\uFEC6",
-	        "initial": "\uFEC7",
-	        "medial": "\uFEC8"
-	    },
-	    "ain": {
-	        "normal": [
-	            "\u0639"
-	        ],
-	        "three_dots_above": [
-	            "\u06A0"
-	        ],
-	        "two_dots_above": [
-	            "\u075D"
-	        ],
-	        "three_dots_pointing_downwards_above": [
-	            "\u075E"
-	        ],
-	        "two_dots_vertically_above": [
-	            "\u075F"
-	        ],
-	        "three_dots_below": [
-	            "\u08B3"
-	        ],
-	        "isolated": "\uFEC9",
-	        "final": "\uFECA",
-	        "initial": "\uFECB",
-	        "medial": "\uFECC"
-	    },
-	    "ghain": {
-	        "normal": [
-	            "\u063A"
-	        ],
-	        "dot_below": [
-	            "\u06FC"
-	        ],
-	        "isolated": "\uFECD",
-	        "final": "\uFECE",
-	        "initial": "\uFECF",
-	        "medial": "\uFED0"
-	    },
-	    "feh": {
-	        "normal": [
-	            "\u0641"
-	        ],
-	        "dotless": [
-	            "\u06A1"
-	        ],
-	        "dot_moved_below": [
-	            "\u06A2"
-	        ],
-	        "dot_below": [
-	            "\u06A3"
-	        ],
-	        "three_dots_below": [
-	            "\u06A5"
-	        ],
-	        "two_dots_below": [
-	            "\u0760"
-	        ],
-	        "three_dots_pointing_upwards_below": [
-	            "\u0761"
-	        ],
-	        "dot_below_three_dots_above": [
-	            "\u08A4"
-	        ],
-	        "isolated": "\uFED1",
-	        "final": "\uFED2",
-	        "initial": "\uFED3",
-	        "medial": "\uFED4"
-	    },
-	    "qaf": {
-	        "normal": [
-	            "\u0642"
-	        ],
-	        "dotless": [
-	            "\u066F"
-	        ],
-	        "dot_above": [
-	            "\u06A7"
-	        ],
-	        "three_dots_above": [
-	            "\u06A8"
-	        ],
-	        "dot_below": [
-	            "\u08A5"
-	        ],
-	        "isolated": "\uFED5",
-	        "final": "\uFED6",
-	        "initial": "\uFED7",
-	        "medial": "\uFED8"
-	    },
-	    "kaf": {
-	        "normal": [
-	            "\u0643"
-	        ],
-	        "swash": [
-	            "\u06AA"
-	        ],
-	        "ring": [
-	            "\u06AB"
-	        ],
-	        "dot_above": [
-	            "\u06AC"
-	        ],
-	        "three_dots_below": [
-	            "\u06AE"
-	        ],
-	        "two_dots_above": [
-	            "\u077F"
-	        ],
-	        "dot_below": [
-	            "\u08B4"
-	        ],
-	        "isolated": "\uFED9",
-	        "final": "\uFEDA",
-	        "initial": "\uFEDB",
-	        "medial": "\uFEDC"
-	    },
-	    "lam": {
-	        "normal": [
-	            "\u0644"
-	        ],
-	        "small_v": [
-	            "\u06B5"
-	        ],
-	        "dot_above": [
-	            "\u06B6"
-	        ],
-	        "three_dots_above": [
-	            "\u06B7"
-	        ],
-	        "three_dots_below": [
-	            "\u06B8"
-	        ],
-	        "bar": [
-	            "\u076A"
-	        ],
-	        "double_bar": [
-	            "\u08A6"
-	        ],
-	        "isolated": "\uFEDD",
-	        "final": "\uFEDE",
-	        "initial": "\uFEDF",
-	        "medial": "\uFEE0"
-	    },
-	    "meem": {
-	        "normal": [
-	            "\u0645"
-	        ],
-	        "dot_above": [
-	            "\u0765"
-	        ],
-	        "dot_below": [
-	            "\u0766"
-	        ],
-	        "three_dots_above": [
-	            "\u08A7"
-	        ],
-	        "isolated": "\uFEE1",
-	        "final": "\uFEE2",
-	        "initial": "\uFEE3",
-	        "medial": "\uFEE4"
-	    },
-	    "noon": {
-	        "normal": [
-	            "\u0646"
-	        ],
-	        "dot_below": [
-	            "\u06B9"
-	        ],
-	        "ring": [
-	            "\u06BC"
-	        ],
-	        "three_dots_above": [
-	            "\u06BD"
-	        ],
-	        "two_dots_below": [
-	            "\u0767"
-	        ],
-	        "small_tah": [
-	            "\u0768"
-	        ],
-	        "small_v": [
-	            "\u0769"
-	        ],
-	        "isolated": "\uFEE5",
-	        "final": "\uFEE6",
-	        "initial": "\uFEE7",
-	        "medial": "\uFEE8"
-	    },
-	    "heh": {
-	        "normal": [
-	            "\u0647"
-	        ],
-	        "isolated": "\uFEE9",
-	        "final": "\uFEEA",
-	        "initial": "\uFEEB",
-	        "medial": "\uFEEC"
-	    },
-	    "waw": {
-	        "normal": [
-	            "\u0648"
-	        ],
-	        "hamza_above": {
-	            "normal": [
-	                "\u0624",
-	                "\u0648\u0654"
-	            ],
-	            "isolated": "\uFE85",
-	            "final": "\uFE86"
-	        },
-	        "high_hamza": [
-	            "\u0676",
-	            "\u0648\u0674"
-	        ],
-	        "ring": [
-	            "\u06C4"
-	        ],
-	        "two_dots_above": [
-	            "\u06CA"
-	        ],
-	        "dot_above": [
-	            "\u06CF"
-	        ],
-	        "indic_two_above": [
-	            "\u0778"
-	        ],
-	        "indic_three_above": [
-	            "\u0779"
-	        ],
-	        "dot_within": [
-	            "\u08AB"
-	        ],
-	        "isolated": "\uFEED",
-	        "final": "\uFEEE"
-	    },
-	    "alef_maksura": {
-	        "normal": [
-	            "\u0649"
-	        ],
-	        "hamza_above": [
-	            "\u0626",
-	            "\u064A\u0654"
-	        ],
-	        "initial": "\uFBE8",
-	        "medial": "\uFBE9",
-	        "isolated": "\uFEEF",
-	        "final": "\uFEF0"
-	    },
-	    "yeh": {
-	        "normal": [
-	            "\u064A"
-	        ],
-	        "hamza_above": {
-	            "normal": [
-	                "\u0626",
-	                "\u0649\u0654"
-	            ],
-	            "isolated": "\uFE89",
-	            "final": "\uFE8A",
-	            "initial": "\uFE8B",
-	            "medial": "\uFE8C"
-	        },
-	        "two_dots_below_hamza_above": [
-	            "\u08A8"
-	        ],
-	        "high_hamza": [
-	            "\u0678",
-	            "\u064A\u0674"
-	        ],
-	        "tail": [
-	            "\u06CD"
-	        ],
-	        "small_v": [
-	            "\u06CE"
-	        ],
-	        "three_dots_below": [
-	            "\u06D1"
-	        ],
-	        "two_dots_below_dot_above": [
-	            "\u08A9"
-	        ],
-	        "two_dots_below_small_noon_above": [
-	            "\u08BA"
-	        ],
-	        "isolated": "\uFEF1",
-	        "final": "\uFEF2",
-	        "initial": "\uFEF3",
-	        "medial": "\uFEF4"
-	    },
-	    "tteh": {
-	        "normal": [
-	            "\u0679"
-	        ],
-	        "isolated": "\uFB66",
-	        "final": "\uFB67",
-	        "initial": "\uFB68",
-	        "medial": "\uFB69"
-	    },
-	    "tteheh": {
-	        "normal": [
-	            "\u067A"
-	        ],
-	        "isolated": "\uFB5E",
-	        "final": "\uFB5F",
-	        "initial": "\uFB60",
-	        "medial": "\uFB61"
-	    },
-	    "beeh": {
-	        "normal": [
-	            "\u067B"
-	        ],
-	        "isolated": "\uFB52",
-	        "final": "\uFB53",
-	        "initial": "\uFB54",
-	        "medial": "\uFB55"
-	    },
-	    "peh": {
-	        "normal": [
-	            "\u067E"
-	        ],
-	        "small_meem_above": [
-	            "\u08B7"
-	        ],
-	        "isolated": "\uFB56",
-	        "final": "\uFB57",
-	        "initial": "\uFB58",
-	        "medial": "\uFB59"
-	    },
-	    "teheh": {
-	        "normal": [
-	            "\u067F"
-	        ],
-	        "isolated": "\uFB62",
-	        "final": "\uFB63",
-	        "initial": "\uFB64",
-	        "medial": "\uFB65"
-	    },
-	    "beheh": {
-	        "normal": [
-	            "\u0680"
-	        ],
-	        "isolated": "\uFB5A",
-	        "final": "\uFB5B",
-	        "initial": "\uFB5C",
-	        "medial": "\uFB5D"
-	    },
-	    "nyeh": {
-	        "normal": [
-	            "\u0683"
-	        ],
-	        "isolated": "\uFB76",
-	        "final": "\uFB77",
-	        "initial": "\uFB78",
-	        "medial": "\uFB79"
-	    },
-	    "dyeh": {
-	        "normal": [
-	            "\u0684"
-	        ],
-	        "isolated": "\uFB72",
-	        "final": "\uFB73",
-	        "initial": "\uFB74",
-	        "medial": "\uFB75"
-	    },
-	    "tcheh": {
-	        "normal": [
-	            "\u0686"
-	        ],
-	        "dot_above": [
-	            "\u06BF"
-	        ],
-	        "isolated": "\uFB7A",
-	        "final": "\uFB7B",
-	        "initial": "\uFB7C",
-	        "medial": "\uFB7D"
-	    },
-	    "tcheheh": {
-	        "normal": [
-	            "\u0687"
-	        ],
-	        "isolated": "\uFB7E",
-	        "final": "\uFB7F",
-	        "initial": "\uFB80",
-	        "medial": "\uFB81"
-	    },
-	    "ddal": {
-	        "normal": [
-	            "\u0688"
-	        ],
-	        "isolated": "\uFB88",
-	        "final": "\uFB89"
-	    },
-	    "dahal": {
-	        "normal": [
-	            "\u068C"
-	        ],
-	        "isolated": "\uFB84",
-	        "final": "\uFB85"
-	    },
-	    "ddahal": {
-	        "normal": [
-	            "\u068D"
-	        ],
-	        "isolated": "\uFB82",
-	        "final": "\uFB83"
-	    },
-	    "dul": {
-	        "normal": [
-	            "\u068F",
-	            "\u068E"
-	        ],
-	        "isolated": "\uFB86",
-	        "final": "\uFB87"
-	    },
-	    "rreh": {
-	        "normal": [
-	            "\u0691"
-	        ],
-	        "isolated": "\uFB8C",
-	        "final": "\uFB8D"
-	    },
-	    "jeh": {
-	        "normal": [
-	            "\u0698"
-	        ],
-	        "isolated": "\uFB8A",
-	        "final": "\uFB8B"
-	    },
-	    "veh": {
-	        "normal": [
-	            "\u06A4"
-	        ],
-	        "isolated": "\uFB6A",
-	        "final": "\uFB6B",
-	        "initial": "\uFB6C",
-	        "medial": "\uFB6D"
-	    },
-	    "peheh": {
-	        "normal": [
-	            "\u06A6"
-	        ],
-	        "isolated": "\uFB6E",
-	        "final": "\uFB6F",
-	        "initial": "\uFB70",
-	        "medial": "\uFB71"
-	    },
-	    "keheh": {
-	        "normal": [
-	            "\u06A9"
-	        ],
-	        "dot_above": [
-	            "\u0762"
-	        ],
-	        "three_dots_above": [
-	            "\u0763"
-	        ],
-	        "three_dots_pointing_upwards_below": [
-	            "\u0764"
-	        ],
-	        "isolated": "\uFB8E",
-	        "final": "\uFB8F",
-	        "initial": "\uFB90",
-	        "medial": "\uFB91"
-	    },
-	    "ng": {
-	        "normal": [
-	            "\u06AD"
-	        ],
-	        "isolated": "\uFBD3",
-	        "final": "\uFBD4",
-	        "initial": "\uFBD5",
-	        "medial": "\uFBD6"
-	    },
-	    "gaf": {
-	        "normal": [
-	            "\u06AF"
-	        ],
-	        "ring": [
-	            "\u06B0"
-	        ],
-	        "two_dots_below": [
-	            "\u06B2"
-	        ],
-	        "three_dots_above": [
-	            "\u06B4"
-	        ],
-	        "inverted_stroke": [
-	            "\u08B0"
-	        ],
-	        "isolated": "\uFB92",
-	        "final": "\uFB93",
-	        "initial": "\uFB94",
-	        "medial": "\uFB95"
-	    },
-	    "ngoeh": {
-	        "normal": [
-	            "\u06B1"
-	        ],
-	        "isolated": "\uFB9A",
-	        "final": "\uFB9B",
-	        "initial": "\uFB9C",
-	        "medial": "\uFB9D"
-	    },
-	    "gueh": {
-	        "normal": [
-	            "\u06B3"
-	        ],
-	        "isolated": "\uFB96",
-	        "final": "\uFB97",
-	        "initial": "\uFB98",
-	        "medial": "\uFB99"
-	    },
-	    "noon ghunna": {
-	        "normal": [
-	            "\u06BA"
-	        ],
-	        "isolated": "\uFB9E",
-	        "final": "\uFB9F"
-	    },
-	    "rnoon": {
-	        "normal": [
-	            "\u06BB"
-	        ],
-	        "isolated": "\uFBA0",
-	        "final": "\uFBA1",
-	        "initial": "\uFBA2",
-	        "medial": "\uFBA3"
-	    },
-	    "heh doachashmee": {
-	        "normal": [
-	            "\u06BE"
-	        ],
-	        "isolated": "\uFBAA",
-	        "final": "\uFBAB",
-	        "initial": "\uFBAC",
-	        "medial": "\uFBAD"
-	    },
-	    "heh goal": {
-	        "normal": [
-	            "\u06C1"
-	        ],
-	        "hamza_above": [
-	            "\u06C1\u0654",
-	            "\u06C2"
-	        ],
-	        "isolated": "\uFBA6",
-	        "final": "\uFBA7",
-	        "initial": "\uFBA8",
-	        "medial": "\uFBA9"
-	    },
-	    "teh marbuta goal": {
-	        "normal": [
-	            "\u06C3"
-	        ]
-	    },
-	    "kirghiz oe": {
-	        "normal": [
-	            "\u06C5"
-	        ],
-	        "isolated": "\uFBE0",
-	        "final": "\uFBE1"
-	    },
-	    "oe": {
-	        "normal": [
-	            "\u06C6"
-	        ],
-	        "isolated": "\uFBD9",
-	        "final": "\uFBDA"
-	    },
-	    "u": {
-	        "normal": [
-	            "\u06C7"
-	        ],
-	        "hamza_above": {
-	            "normal": [
-	                "\u0677",
-	                "\u06C7\u0674"
-	            ],
-	            "isolated": "\uFBDD"
-	        },
-	        "isolated": "\uFBD7",
-	        "final": "\uFBD8"
-	    },
-	    "yu": {
-	        "normal": [
-	            "\u06C8"
-	        ],
-	        "isolated": "\uFBDB",
-	        "final": "\uFBDC"
-	    },
-	    "kirghiz yu": {
-	        "normal": [
-	            "\u06C9"
-	        ],
-	        "isolated": "\uFBE2",
-	        "final": "\uFBE3"
-	    },
-	    "ve": {
-	        "normal": [
-	            "\u06CB"
-	        ],
-	        "isolated": "\uFBDE",
-	        "final": "\uFBDF"
-	    },
-	    "farsi yeh": {
-	        "normal": [
-	            "\u06CC"
-	        ],
-	        "indic_two_above": [
-	            "\u0775"
-	        ],
-	        "indic_three_above": [
-	            "\u0776"
-	        ],
-	        "indic_four_above": [
-	            "\u0777"
-	        ],
-	        "isolated": "\uFBFC",
-	        "final": "\uFBFD",
-	        "initial": "\uFBFE",
-	        "medial": "\uFBFF"
-	    },
-	    "e": {
-	        "normal": [
-	            "\u06D0"
-	        ],
-	        "isolated": "\uFBE4",
-	        "final": "\uFBE5",
-	        "initial": "\uFBE6",
-	        "medial": "\uFBE7"
-	    },
-	    "yeh barree": {
-	        "normal": [
-	            "\u06D2"
-	        ],
-	        "hamza_above": {
-	            "normal": [
-	                "\u06D2\u0654",
-	                "\u06D3"
-	            ],
-	            "isolated": "\uFBB0",
-	            "final": "\uFBB1"
-	        },
-	        "indic_two_above": [
-	            "\u077A"
-	        ],
-	        "indic_three_above": [
-	            "\u077B"
-	        ],
-	        "isolated": "\uFBAE",
-	        "final": "\uFBAF"
-	    },
-	    "ae": {
-	        "normal": [
-	            "\u06D5"
-	        ],
-	        "isolated": "\u06D5",
-	        "final": "\uFEEA",
-	        "yeh_above": {
-	            "normal": [
-	                "\u06C0",
-	                "\u06D5\u0654"
-	            ],
-	            "isolated": "\uFBA4",
-	            "final": "\uFBA5"
-	        }
-	    },
-	    "rohingya yeh": {
-	        "normal": [
-	            "\u08AC"
-	        ]
-	    },
-	    "low alef": {
-	        "normal": [
-	            "\u08AD"
-	        ]
-	    },
-	    "straight waw": {
-	        "normal": [
-	            "\u08B1"
-	        ]
-	    },
-	    "african feh": {
-	        "normal": [
-	            "\u08BB"
-	        ]
-	    },
-	    "african qaf": {
-	        "normal": [
-	            "\u08BC"
-	        ]
-	    },
-	    "african noon": {
-	        "normal": [
-	            "\u08BD"
-	        ]
-	    }
-	};
-	exports.default = arabicReference;
-	});
-
-	var unicodeLigatures = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-	var ligatureReference = {
-	    "\u0626\u0627": {
-	        "isolated": "\uFBEA",
-	        "final": "\uFBEB"
-	    },
-	    "\u0626\u06D5": {
-	        "isolated": "\uFBEC",
-	        "final": "\uFBED"
-	    },
-	    "\u0626\u0648": {
-	        "isolated": "\uFBEE",
-	        "final": "\uFBEF"
-	    },
-	    "\u0626\u06C7": {
-	        "isolated": "\uFBF0",
-	        "final": "\uFBF1"
-	    },
-	    "\u0626\u06C6": {
-	        "isolated": "\uFBF2",
-	        "final": "\uFBF3"
-	    },
-	    "\u0626\u06C8": {
-	        "isolated": "\uFBF4",
-	        "final": "\uFBF5"
-	    },
-	    "\u0626\u06D0": {
-	        "isolated": "\uFBF6",
-	        "final": "\uFBF7",
-	        "initial": "\uFBF8"
-	    },
-	    "\u0626\u0649": {
-	        "uighur_kirghiz": {
-	            "isolated": "\uFBF9",
-	            "final": "\uFBFA",
-	            "initial": "\uFBFB"
-	        },
-	        "isolated": "\uFC03",
-	        "final": "\uFC68"
-	    },
-	    "\u0626\u062C": {
-	        "isolated": "\uFC00",
-	        "initial": "\uFC97"
-	    },
-	    "\u0626\u062D": {
-	        "isolated": "\uFC01",
-	        "initial": "\uFC98"
-	    },
-	    "\u0626\u0645": {
-	        "isolated": "\uFC02",
-	        "final": "\uFC66",
-	        "initial": "\uFC9A",
-	        "medial": "\uFCDF"
-	    },
-	    "\u0626\u064A": {
-	        "isolated": "\uFC04",
-	        "final": "\uFC69"
-	    },
-	    "\u0628\u062C": {
-	        "isolated": "\uFC05",
-	        "initial": "\uFC9C"
-	    },
-	    "\u0628\u062D": {
-	        "isolated": "\uFC06",
-	        "initial": "\uFC9D"
-	    },
-	    "\u0628\u062E": {
-	        "isolated": "\uFC07",
-	        "initial": "\uFC9E"
-	    },
-	    "\u0628\u0645": {
-	        "isolated": "\uFC08",
-	        "final": "\uFC6C",
-	        "initial": "\uFC9F",
-	        "medial": "\uFCE1"
-	    },
-	    "\u0628\u0649": {
-	        "isolated": "\uFC09",
-	        "final": "\uFC6E"
-	    },
-	    "\u0628\u064A": {
-	        "isolated": "\uFC0A",
-	        "final": "\uFC6F"
-	    },
-	    "\u062A\u062C": {
-	        "isolated": "\uFC0B",
-	        "initial": "\uFCA1"
-	    },
-	    "\u062A\u062D": {
-	        "isolated": "\uFC0C",
-	        "initial": "\uFCA2"
-	    },
-	    "\u062A\u062E": {
-	        "isolated": "\uFC0D",
-	        "initial": "\uFCA3"
-	    },
-	    "\u062A\u0645": {
-	        "isolated": "\uFC0E",
-	        "final": "\uFC72",
-	        "initial": "\uFCA4",
-	        "medial": "\uFCE3"
-	    },
-	    "\u062A\u0649": {
-	        "isolated": "\uFC0F",
-	        "final": "\uFC74"
-	    },
-	    "\u062A\u064A": {
-	        "isolated": "\uFC10",
-	        "final": "\uFC75"
-	    },
-	    "\u062B\u062C": {
-	        "isolated": "\uFC11"
-	    },
-	    "\u062B\u0645": {
-	        "isolated": "\uFC12",
-	        "final": "\uFC78",
-	        "initial": "\uFCA6",
-	        "medial": "\uFCE5"
-	    },
-	    "\u062B\u0649": {
-	        "isolated": "\uFC13",
-	        "final": "\uFC7A"
-	    },
-	    "\u062B\u0648": {
-	        "isolated": "\uFC14"
-	    },
-	    "\u062C\u062D": {
-	        "isolated": "\uFC15",
-	        "initial": "\uFCA7"
-	    },
-	    "\u062C\u0645": {
-	        "isolated": "\uFC16",
-	        "initial": "\uFCA8"
-	    },
-	    "\u062D\u062C": {
-	        "isolated": "\uFC17",
-	        "initial": "\uFCA9"
-	    },
-	    "\u062D\u0645": {
-	        "isolated": "\uFC18",
-	        "initial": "\uFCAA"
-	    },
-	    "\u062E\u062C": {
-	        "isolated": "\uFC19",
-	        "initial": "\uFCAB"
-	    },
-	    "\u062E\u062D": {
-	        "isolated": "\uFC1A"
-	    },
-	    "\u062E\u0645": {
-	        "isolated": "\uFC1B",
-	        "initial": "\uFCAC"
-	    },
-	    "\u0633\u062C": {
-	        "isolated": "\uFC1C",
-	        "initial": "\uFCAD",
-	        "medial": "\uFD34"
-	    },
-	    "\u0633\u062D": {
-	        "isolated": "\uFC1D",
-	        "initial": "\uFCAE",
-	        "medial": "\uFD35"
-	    },
-	    "\u0633\u062E": {
-	        "isolated": "\uFC1E",
-	        "initial": "\uFCAF",
-	        "medial": "\uFD36"
-	    },
-	    "\u0633\u0645": {
-	        "isolated": "\uFC1F",
-	        "initial": "\uFCB0",
-	        "medial": "\uFCE7"
-	    },
-	    "\u0635\u062D": {
-	        "isolated": "\uFC20",
-	        "initial": "\uFCB1"
-	    },
-	    "\u0635\u0645": {
-	        "isolated": "\uFC21",
-	        "initial": "\uFCB3"
-	    },
-	    "\u0636\u062C": {
-	        "isolated": "\uFC22",
-	        "initial": "\uFCB4"
-	    },
-	    "\u0636\u062D": {
-	        "isolated": "\uFC23",
-	        "initial": "\uFCB5"
-	    },
-	    "\u0636\u062E": {
-	        "isolated": "\uFC24",
-	        "initial": "\uFCB6"
-	    },
-	    "\u0636\u0645": {
-	        "isolated": "\uFC25",
-	        "initial": "\uFCB7"
-	    },
-	    "\u0637\u062D": {
-	        "isolated": "\uFC26",
-	        "initial": "\uFCB8"
-	    },
-	    "\u0637\u0645": {
-	        "isolated": "\uFC27",
-	        "initial": "\uFD33",
-	        "medial": "\uFD3A"
-	    },
-	    "\u0638\u0645": {
-	        "isolated": "\uFC28",
-	        "initial": "\uFCB9",
-	        "medial": "\uFD3B"
-	    },
-	    "\u0639\u062C": {
-	        "isolated": "\uFC29",
-	        "initial": "\uFCBA"
-	    },
-	    "\u0639\u0645": {
-	        "isolated": "\uFC2A",
-	        "initial": "\uFCBB"
-	    },
-	    "\u063A\u062C": {
-	        "isolated": "\uFC2B",
-	        "initial": "\uFCBC"
-	    },
-	    "\u063A\u0645": {
-	        "isolated": "\uFC2C",
-	        "initial": "\uFCBD"
-	    },
-	    "\u0641\u062C": {
-	        "isolated": "\uFC2D",
-	        "initial": "\uFCBE"
-	    },
-	    "\u0641\u062D": {
-	        "isolated": "\uFC2E",
-	        "initial": "\uFCBF"
-	    },
-	    "\u0641\u062E": {
-	        "isolated": "\uFC2F",
-	        "initial": "\uFCC0"
-	    },
-	    "\u0641\u0645": {
-	        "isolated": "\uFC30",
-	        "initial": "\uFCC1"
-	    },
-	    "\u0641\u0649": {
-	        "isolated": "\uFC31",
-	        "final": "\uFC7C"
-	    },
-	    "\u0641\u064A": {
-	        "isolated": "\uFC32",
-	        "final": "\uFC7D"
-	    },
-	    "\u0642\u062D": {
-	        "isolated": "\uFC33",
-	        "initial": "\uFCC2"
-	    },
-	    "\u0642\u0645": {
-	        "isolated": "\uFC34",
-	        "initial": "\uFCC3"
-	    },
-	    "\u0642\u0649": {
-	        "isolated": "\uFC35",
-	        "final": "\uFC7E"
-	    },
-	    "\u0642\u064A": {
-	        "isolated": "\uFC36",
-	        "final": "\uFC7F"
-	    },
-	    "\u0643\u0627": {
-	        "isolated": "\uFC37",
-	        "final": "\uFC80"
-	    },
-	    "\u0643\u062C": {
-	        "isolated": "\uFC38",
-	        "initial": "\uFCC4"
-	    },
-	    "\u0643\u062D": {
-	        "isolated": "\uFC39",
-	        "initial": "\uFCC5"
-	    },
-	    "\u0643\u062E": {
-	        "isolated": "\uFC3A",
-	        "initial": "\uFCC6"
-	    },
-	    "\u0643\u0644": {
-	        "isolated": "\uFC3B",
-	        "final": "\uFC81",
-	        "initial": "\uFCC7",
-	        "medial": "\uFCEB"
-	    },
-	    "\u0643\u0645": {
-	        "isolated": "\uFC3C",
-	        "final": "\uFC82",
-	        "initial": "\uFCC8",
-	        "medial": "\uFCEC"
-	    },
-	    "\u0643\u0649": {
-	        "isolated": "\uFC3D",
-	        "final": "\uFC83"
-	    },
-	    "\u0643\u064A": {
-	        "isolated": "\uFC3E",
-	        "final": "\uFC84"
-	    },
-	    "\u0644\u062C": {
-	        "isolated": "\uFC3F",
-	        "initial": "\uFCC9"
-	    },
-	    "\u0644\u062D": {
-	        "isolated": "\uFC40",
-	        "initial": "\uFCCA"
-	    },
-	    "\u0644\u062E": {
-	        "isolated": "\uFC41",
-	        "initial": "\uFCCB"
-	    },
-	    "\u0644\u0645": {
-	        "isolated": "\uFC42",
-	        "final": "\uFC85",
-	        "initial": "\uFCCC",
-	        "medial": "\uFCED"
-	    },
-	    "\u0644\u0649": {
-	        "isolated": "\uFC43",
-	        "final": "\uFC86"
-	    },
-	    "\u0644\u064A": {
-	        "isolated": "\uFC44",
-	        "final": "\uFC87"
-	    },
-	    "\u0645\u062C": {
-	        "isolated": "\uFC45",
-	        "initial": "\uFCCE"
-	    },
-	    "\u0645\u062D": {
-	        "isolated": "\uFC46",
-	        "initial": "\uFCCF"
-	    },
-	    "\u0645\u062E": {
-	        "isolated": "\uFC47",
-	        "initial": "\uFCD0"
-	    },
-	    "\u0645\u0645": {
-	        "isolated": "\uFC48",
-	        "final": "\uFC89",
-	        "initial": "\uFCD1"
-	    },
-	    "\u0645\u0649": {
-	        "isolated": "\uFC49"
-	    },
-	    "\u0645\u064A": {
-	        "isolated": "\uFC4A"
-	    },
-	    "\u0646\u062C": {
-	        "isolated": "\uFC4B",
-	        "initial": "\uFCD2"
-	    },
-	    "\u0646\u062D": {
-	        "isolated": "\uFC4C",
-	        "initial": "\uFCD3"
-	    },
-	    "\u0646\u062E": {
-	        "isolated": "\uFC4D",
-	        "initial": "\uFCD4"
-	    },
-	    "\u0646\u0645": {
-	        "isolated": "\uFC4E",
-	        "final": "\uFC8C",
-	        "initial": "\uFCD5",
-	        "medial": "\uFCEE"
-	    },
-	    "\u0646\u0649": {
-	        "isolated": "\uFC4F",
-	        "final": "\uFC8E"
-	    },
-	    "\u0646\u064A": {
-	        "isolated": "\uFC50",
-	        "final": "\uFC8F"
-	    },
-	    "\u0647\u062C": {
-	        "isolated": "\uFC51",
-	        "initial": "\uFCD7"
-	    },
-	    "\u0647\u0645": {
-	        "isolated": "\uFC52",
-	        "initial": "\uFCD8"
-	    },
-	    "\u0647\u0649": {
-	        "isolated": "\uFC53"
-	    },
-	    "\u0647\u064A": {
-	        "isolated": "\uFC54"
-	    },
-	    "\u064A\u062C": {
-	        "isolated": "\uFC55",
-	        "initial": "\uFCDA"
-	    },
-	    "\u064A\u062D": {
-	        "isolated": "\uFC56",
-	        "initial": "\uFCDB"
-	    },
-	    "\u064A\u062E": {
-	        "isolated": "\uFC57",
-	        "initial": "\uFCDC"
-	    },
-	    "\u064A\u0645": {
-	        "isolated": "\uFC58",
-	        "final": "\uFC93",
-	        "initial": "\uFCDD",
-	        "medial": "\uFCF0"
-	    },
-	    "\u064A\u0649": {
-	        "isolated": "\uFC59",
-	        "final": "\uFC95"
-	    },
-	    "\u064A\u064A": {
-	        "isolated": "\uFC5A",
-	        "final": "\uFC96"
-	    },
-	    "\u0630\u0670": {
-	        "isolated": "\uFC5B"
-	    },
-	    "\u0631\u0670": {
-	        "isolated": "\uFC5C"
-	    },
-	    "\u0649\u0670": {
-	        "isolated": "\uFC5D",
-	        "final": "\uFC90"
-	    },
-	    "\u064C\u0651": {
-	        "isolated": "\uFC5E"
-	    },
-	    "\u064D\u0651": {
-	        "isolated": "\uFC5F"
-	    },
-	    "\u064E\u0651": {
-	        "isolated": "\uFC60"
-	    },
-	    "\u064F\u0651": {
-	        "isolated": "\uFC61"
-	    },
-	    "\u0650\u0651": {
-	        "isolated": "\uFC62"
-	    },
-	    "\u0651\u0670": {
-	        "isolated": "\uFC63"
-	    },
-	    "\u0626\u0631": {
-	        "final": "\uFC64"
-	    },
-	    "\u0626\u0632": {
-	        "final": "\uFC65"
-	    },
-	    "\u0626\u0646": {
-	        "final": "\uFC67"
-	    },
-	    "\u0628\u0631": {
-	        "final": "\uFC6A"
-	    },
-	    "\u0628\u0632": {
-	        "final": "\uFC6B"
-	    },
-	    "\u0628\u0646": {
-	        "final": "\uFC6D"
-	    },
-	    "\u062A\u0631": {
-	        "final": "\uFC70"
-	    },
-	    "\u062A\u0632": {
-	        "final": "\uFC71"
-	    },
-	    "\u062A\u0646": {
-	        "final": "\uFC73"
-	    },
-	    "\u062B\u0631": {
-	        "final": "\uFC76"
-	    },
-	    "\u062B\u0632": {
-	        "final": "\uFC77"
-	    },
-	    "\u062B\u0646": {
-	        "final": "\uFC79"
-	    },
-	    "\u062B\u064A": {
-	        "final": "\uFC7B"
-	    },
-	    "\u0645\u0627": {
-	        "final": "\uFC88"
-	    },
-	    "\u0646\u0631": {
-	        "final": "\uFC8A"
-	    },
-	    "\u0646\u0632": {
-	        "final": "\uFC8B"
-	    },
-	    "\u0646\u0646": {
-	        "final": "\uFC8D"
-	    },
-	    "\u064A\u0631": {
-	        "final": "\uFC91"
-	    },
-	    "\u064A\u0632": {
-	        "final": "\uFC92"
-	    },
-	    "\u064A\u0646": {
-	        "final": "\uFC94"
-	    },
-	    "\u0626\u062E": {
-	        "initial": "\uFC99"
-	    },
-	    "\u0626\u0647": {
-	        "initial": "\uFC9B",
-	        "medial": "\uFCE0"
-	    },
-	    "\u0628\u0647": {
-	        "initial": "\uFCA0",
-	        "medial": "\uFCE2"
-	    },
-	    "\u062A\u0647": {
-	        "initial": "\uFCA5",
-	        "medial": "\uFCE4"
-	    },
-	    "\u0635\u062E": {
-	        "initial": "\uFCB2"
-	    },
-	    "\u0644\u0647": {
-	        "initial": "\uFCCD"
-	    },
-	    "\u0646\u0647": {
-	        "initial": "\uFCD6",
-	        "medial": "\uFCEF"
-	    },
-	    "\u0647\u0670": {
-	        "initial": "\uFCD9"
-	    },
-	    "\u064A\u0647": {
-	        "initial": "\uFCDE",
-	        "medial": "\uFCF1"
-	    },
-	    "\u062B\u0647": {
-	        "medial": "\uFCE6"
-	    },
-	    "\u0633\u0647": {
-	        "medial": "\uFCE8",
-	        "initial": "\uFD31"
-	    },
-	    "\u0634\u0645": {
-	        "medial": "\uFCE9",
-	        "isolated": "\uFD0C",
-	        "final": "\uFD28",
-	        "initial": "\uFD30"
-	    },
-	    "\u0634\u0647": {
-	        "medial": "\uFCEA",
-	        "initial": "\uFD32"
-	    },
-	    "\u0640\u064E\u0651": {
-	        "medial": "\uFCF2"
-	    },
-	    "\u0640\u064F\u0651": {
-	        "medial": "\uFCF3"
-	    },
-	    "\u0640\u0650\u0651": {
-	        "medial": "\uFCF4"
-	    },
-	    "\u0637\u0649": {
-	        "isolated": "\uFCF5",
-	        "final": "\uFD11"
-	    },
-	    "\u0637\u064A": {
-	        "isolated": "\uFCF6",
-	        "final": "\uFD12"
-	    },
-	    "\u0639\u0649": {
-	        "isolated": "\uFCF7",
-	        "final": "\uFD13"
-	    },
-	    "\u0639\u064A": {
-	        "isolated": "\uFCF8",
-	        "final": "\uFD14"
-	    },
-	    "\u063A\u0649": {
-	        "isolated": "\uFCF9",
-	        "final": "\uFD15"
-	    },
-	    "\u063A\u064A": {
-	        "isolated": "\uFCFA",
-	        "final": "\uFD16"
-	    },
-	    "\u0633\u0649": {
-	        "isolated": "\uFCFB"
-	    },
-	    "\u0633\u064A": {
-	        "isolated": "\uFCFC",
-	        "final": "\uFD18"
-	    },
-	    "\u0634\u0649": {
-	        "isolated": "\uFCFD",
-	        "final": "\uFD19"
-	    },
-	    "\u0634\u064A": {
-	        "isolated": "\uFCFE",
-	        "final": "\uFD1A"
-	    },
-	    "\u062D\u0649": {
-	        "isolated": "\uFCFF",
-	        "final": "\uFD1B"
-	    },
-	    "\u062D\u064A": {
-	        "isolated": "\uFD00",
-	        "final": "\uFD1C"
-	    },
-	    "\u062C\u0649": {
-	        "isolated": "\uFD01",
-	        "final": "\uFD1D"
-	    },
-	    "\u062C\u064A": {
-	        "isolated": "\uFD02",
-	        "final": "\uFD1E"
-	    },
-	    "\u062E\u0649": {
-	        "isolated": "\uFD03",
-	        "final": "\uFD1F"
-	    },
-	    "\u062E\u064A": {
-	        "isolated": "\uFD04",
-	        "final": "\uFD20"
-	    },
-	    "\u0635\u0649": {
-	        "isolated": "\uFD05",
-	        "final": "\uFD21"
-	    },
-	    "\u0635\u064A": {
-	        "isolated": "\uFD06",
-	        "final": "\uFD22"
-	    },
-	    "\u0636\u0649": {
-	        "isolated": "\uFD07",
-	        "final": "\uFD23"
-	    },
-	    "\u0636\u064A": {
-	        "isolated": "\uFD08",
-	        "final": "\uFD24"
-	    },
-	    "\u0634\u062C": {
-	        "isolated": "\uFD09",
-	        "final": "\uFD25",
-	        "initial": "\uFD2D",
-	        "medial": "\uFD37"
-	    },
-	    "\u0634\u062D": {
-	        "isolated": "\uFD0A",
-	        "final": "\uFD26",
-	        "initial": "\uFD2E",
-	        "medial": "\uFD38"
-	    },
-	    "\u0634\u062E": {
-	        "isolated": "\uFD0B",
-	        "final": "\uFD27",
-	        "initial": "\uFD2F",
-	        "medial": "\uFD39"
-	    },
-	    "\u0634\u0631": {
-	        "isolated": "\uFD0D",
-	        "final": "\uFD29"
-	    },
-	    "\u0633\u0631": {
-	        "isolated": "\uFD0E",
-	        "final": "\uFD2A"
-	    },
-	    "\u0635\u0631": {
-	        "isolated": "\uFD0F",
-	        "final": "\uFD2B"
-	    },
-	    "\u0636\u0631": {
-	        "isolated": "\uFD10",
-	        "final": "\uFD2C"
-	    },
-	    "\u0633\u0639": {
-	        "final": "\uFD17"
-	    },
-	    "\u062A\u062C\u0645": {
-	        "initial": "\uFD50"
-	    },
-	    "\u062A\u062D\u062C": {
-	        "final": "\uFD51",
-	        "initial": "\uFD52"
-	    },
-	    "\u062A\u062D\u0645": {
-	        "initial": "\uFD53"
-	    },
-	    "\u062A\u062E\u0645": {
-	        "initial": "\uFD54"
-	    },
-	    "\u062A\u0645\u062C": {
-	        "initial": "\uFD55"
-	    },
-	    "\u062A\u0645\u062D": {
-	        "initial": "\uFD56"
-	    },
-	    "\u062A\u0645\u062E": {
-	        "initial": "\uFD57"
-	    },
-	    "\u062C\u0645\u062D": {
-	        "final": "\uFD58",
-	        "initial": "\uFD59"
-	    },
-	    "\u062D\u0645\u064A": {
-	        "final": "\uFD5A"
-	    },
-	    "\u062D\u0645\u0649": {
-	        "final": "\uFD5B"
-	    },
-	    "\u0633\u062D\u062C": {
-	        "initial": "\uFD5C"
-	    },
-	    "\u0633\u062C\u062D": {
-	        "initial": "\uFD5D"
-	    },
-	    "\u0633\u062C\u0649": {
-	        "final": "\uFD5E"
-	    },
-	    "\u0633\u0645\u062D": {
-	        "final": "\uFD5F",
-	        "initial": "\uFD60"
-	    },
-	    "\u0633\u0645\u062C": {
-	        "initial": "\uFD61"
-	    },
-	    "\u0633\u0645\u0645": {
-	        "final": "\uFD62",
-	        "initial": "\uFD63"
-	    },
-	    "\u0635\u062D\u062D": {
-	        "final": "\uFD64",
-	        "initial": "\uFD65"
-	    },
-	    "\u0635\u0645\u0645": {
-	        "final": "\uFD66",
-	        "initial": "\uFDC5"
-	    },
-	    "\u0634\u062D\u0645": {
-	        "final": "\uFD67",
-	        "initial": "\uFD68"
-	    },
-	    "\u0634\u062C\u064A": {
-	        "final": "\uFD69"
-	    },
-	    "\u0634\u0645\u062E": {
-	        "final": "\uFD6A",
-	        "initial": "\uFD6B"
-	    },
-	    "\u0634\u0645\u0645": {
-	        "final": "\uFD6C",
-	        "initial": "\uFD6D"
-	    },
-	    "\u0636\u062D\u0649": {
-	        "final": "\uFD6E"
-	    },
-	    "\u0636\u062E\u0645": {
-	        "final": "\uFD6F",
-	        "initial": "\uFD70"
-	    },
-	    "\u0636\u0645\u062D": {
-	        "final": "\uFD71"
-	    },
-	    "\u0637\u0645\u062D": {
-	        "initial": "\uFD72"
-	    },
-	    "\u0637\u0645\u0645": {
-	        "initial": "\uFD73"
-	    },
-	    "\u0637\u0645\u064A": {
-	        "final": "\uFD74"
-	    },
-	    "\u0639\u062C\u0645": {
-	        "final": "\uFD75",
-	        "initial": "\uFDC4"
-	    },
-	    "\u0639\u0645\u0645": {
-	        "final": "\uFD76",
-	        "initial": "\uFD77"
-	    },
-	    "\u0639\u0645\u0649": {
-	        "final": "\uFD78"
-	    },
-	    "\u063A\u0645\u0645": {
-	        "final": "\uFD79"
-	    },
-	    "\u063A\u0645\u064A": {
-	        "final": "\uFD7A"
-	    },
-	    "\u063A\u0645\u0649": {
-	        "final": "\uFD7B"
-	    },
-	    "\u0641\u062E\u0645": {
-	        "final": "\uFD7C",
-	        "initial": "\uFD7D"
-	    },
-	    "\u0642\u0645\u062D": {
-	        "final": "\uFD7E",
-	        "initial": "\uFDB4"
-	    },
-	    "\u0642\u0645\u0645": {
-	        "final": "\uFD7F"
-	    },
-	    "\u0644\u062D\u0645": {
-	        "final": "\uFD80",
-	        "initial": "\uFDB5"
-	    },
-	    "\u0644\u062D\u064A": {
-	        "final": "\uFD81"
-	    },
-	    "\u0644\u062D\u0649": {
-	        "final": "\uFD82"
-	    },
-	    "\u0644\u062C\u062C": {
-	        "initial": "\uFD83",
-	        "final": "\uFD84"
-	    },
-	    "\u0644\u062E\u0645": {
-	        "final": "\uFD85",
-	        "initial": "\uFD86"
-	    },
-	    "\u0644\u0645\u062D": {
-	        "final": "\uFD87",
-	        "initial": "\uFD88"
-	    },
-	    "\u0645\u062D\u062C": {
-	        "initial": "\uFD89"
-	    },
-	    "\u0645\u062D\u0645": {
-	        "initial": "\uFD8A"
-	    },
-	    "\u0645\u062D\u064A": {
-	        "final": "\uFD8B"
-	    },
-	    "\u0645\u062C\u062D": {
-	        "initial": "\uFD8C"
-	    },
-	    "\u0645\u062C\u0645": {
-	        "initial": "\uFD8D"
-	    },
-	    "\u0645\u062E\u062C": {
-	        "initial": "\uFD8E"
-	    },
-	    "\u0645\u062E\u0645": {
-	        "initial": "\uFD8F"
-	    },
-	    "\u0645\u062C\u062E": {
-	        "initial": "\uFD92"
-	    },
-	    "\u0647\u0645\u062C": {
-	        "initial": "\uFD93"
-	    },
-	    "\u0647\u0645\u0645": {
-	        "initial": "\uFD94"
-	    },
-	    "\u0646\u062D\u0645": {
-	        "initial": "\uFD95"
-	    },
-	    "\u0646\u062D\u0649": {
-	        "final": "\uFD96"
-	    },
-	    "\u0646\u062C\u0645": {
-	        "final": "\uFD97",
-	        "initial": "\uFD98"
-	    },
-	    "\u0646\u062C\u0649": {
-	        "final": "\uFD99"
-	    },
-	    "\u0646\u0645\u064A": {
-	        "final": "\uFD9A"
-	    },
-	    "\u0646\u0645\u0649": {
-	        "final": "\uFD9B"
-	    },
-	    "\u064A\u0645\u0645": {
-	        "final": "\uFD9C",
-	        "initial": "\uFD9D"
-	    },
-	    "\u0628\u062E\u064A": {
-	        "final": "\uFD9E"
-	    },
-	    "\u062A\u062C\u064A": {
-	        "final": "\uFD9F"
-	    },
-	    "\u062A\u062C\u0649": {
-	        "final": "\uFDA0"
-	    },
-	    "\u062A\u062E\u064A": {
-	        "final": "\uFDA1"
-	    },
-	    "\u062A\u062E\u0649": {
-	        "final": "\uFDA2"
-	    },
-	    "\u062A\u0645\u064A": {
-	        "final": "\uFDA3"
-	    },
-	    "\u062A\u0645\u0649": {
-	        "final": "\uFDA4"
-	    },
-	    "\u062C\u0645\u064A": {
-	        "final": "\uFDA5"
-	    },
-	    "\u062C\u062D\u0649": {
-	        "final": "\uFDA6"
-	    },
-	    "\u062C\u0645\u0649": {
-	        "final": "\uFDA7"
-	    },
-	    "\u0633\u062E\u0649": {
-	        "final": "\uFDA8"
-	    },
-	    "\u0635\u062D\u064A": {
-	        "final": "\uFDA9"
-	    },
-	    "\u0634\u062D\u064A": {
-	        "final": "\uFDAA"
-	    },
-	    "\u0636\u062D\u064A": {
-	        "final": "\uFDAB"
-	    },
-	    "\u0644\u062C\u064A": {
-	        "final": "\uFDAC"
-	    },
-	    "\u0644\u0645\u064A": {
-	        "final": "\uFDAD"
-	    },
-	    "\u064A\u062D\u064A": {
-	        "final": "\uFDAE"
-	    },
-	    "\u064A\u062C\u064A": {
-	        "final": "\uFDAF"
-	    },
-	    "\u064A\u0645\u064A": {
-	        "final": "\uFDB0"
-	    },
-	    "\u0645\u0645\u064A": {
-	        "final": "\uFDB1"
-	    },
-	    "\u0642\u0645\u064A": {
-	        "final": "\uFDB2"
-	    },
-	    "\u0646\u062D\u064A": {
-	        "final": "\uFDB3"
-	    },
-	    "\u0639\u0645\u064A": {
-	        "final": "\uFDB6"
-	    },
-	    "\u0643\u0645\u064A": {
-	        "final": "\uFDB7"
-	    },
-	    "\u0646\u062C\u062D": {
-	        "initial": "\uFDB8",
-	        "final": "\uFDBD"
-	    },
-	    "\u0645\u062E\u064A": {
-	        "final": "\uFDB9"
-	    },
-	    "\u0644\u062C\u0645": {
-	        "initial": "\uFDBA",
-	        "final": "\uFDBC"
-	    },
-	    "\u0643\u0645\u0645": {
-	        "final": "\uFDBB",
-	        "initial": "\uFDC3"
-	    },
-	    "\u062C\u062D\u064A": {
-	        "final": "\uFDBE"
-	    },
-	    "\u062D\u062C\u064A": {
-	        "final": "\uFDBF"
-	    },
-	    "\u0645\u062C\u064A": {
-	        "final": "\uFDC0"
-	    },
-	    "\u0641\u0645\u064A": {
-	        "final": "\uFDC1"
-	    },
-	    "\u0628\u062D\u064A": {
-	        "final": "\uFDC2"
-	    },
-	    "\u0633\u062E\u064A": {
-	        "final": "\uFDC6"
-	    },
-	    "\u0646\u062C\u064A": {
-	        "final": "\uFDC7"
-	    },
-	    "\u0644\u0622": {
-	        "isolated": "\uFEF5",
-	        "final": "\uFEF6"
-	    },
-	    "\u0644\u0623": {
-	        "isolated": "\uFEF7",
-	        "final": "\uFEF8"
-	    },
-	    "\u0644\u0625": {
-	        "isolated": "\uFEF9",
-	        "final": "\uFEFA"
-	    },
-	    "\u0644\u0627": {
-	        "isolated": "\uFEFB",
-	        "final": "\uFEFC"
-	    },
-	    "words": {
-	        "\u0635\u0644\u06D2": "\uFDF0",
-	        "\u0642\u0644\u06D2": "\uFDF1",
-	        "\u0627\u0644\u0644\u0647": "\uFDF2",
-	        "\u0627\u0643\u0628\u0631": "\uFDF3",
-	        "\u0645\u062D\u0645\u062F": "\uFDF4",
-	        "\u0635\u0644\u0639\u0645": "\uFDF5",
-	        "\u0631\u0633\u0648\u0644": "\uFDF6",
-	        "\u0639\u0644\u064A\u0647": "\uFDF7",
-	        "\u0648\u0633\u0644\u0645": "\uFDF8",
-	        "\u0635\u0644\u0649": "\uFDF9",
-	        "\u0635\u0644\u0649\u0627\u0644\u0644\u0647\u0639\u0644\u064A\u0647\u0648\u0633\u0644\u0645": "\uFDFA",
-	        "\u062C\u0644\u062C\u0644\u0627\u0644\u0647": "\uFDFB",
-	        "\u0631\u06CC\u0627\u0644": "\uFDFC"
-	    }
-	};
-	exports.default = ligatureReference;
-	});
-
-	var reference = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-
-
-	var letterList = Object.keys(unicodeArabic.default);
-	exports.letterList = letterList;
-	var ligatureList = Object.keys(unicodeLigatures.default);
-	exports.ligatureList = ligatureList;
-	var ligatureWordList = Object.keys(unicodeLigatures.default.words);
-	exports.ligatureWordList = ligatureWordList;
-	var lams = '\u0644\u06B5\u06B6\u06B7\u06B8';
-	exports.lams = lams;
-	var alefs = '\u0627\u0622\u0623\u0625\u0671\u0672\u0673\u0675\u0773\u0774';
-	exports.alefs = alefs;
-	// for (var l = 1; l < lams.length; l++) {
-	//   console.log('-');
-	//   for (var a = 0; a < alefs.length; a++) {
-	//     console.log(a + ': ' + lams[l] + alefs[a]);
-	//   }
-	// }
-	var tashkeel = '\u0605\u0640\u0670\u0674\u06DF\u06E7\u06E8';
-	exports.tashkeel = tashkeel;
-	function addToTashkeel(start, finish) {
-	    for (var i = start; i <= finish; i++) {
-	        exports.tashkeel = tashkeel += String.fromCharCode(i);
-	    }
-	}
-	addToTashkeel(0x0610, 0x061A);
-	addToTashkeel(0x064B, 0x065F);
-	addToTashkeel(0x06D6, 0x06DC);
-	addToTashkeel(0x06E0, 0x06E4);
-	addToTashkeel(0x06EA, 0x06ED);
-	addToTashkeel(0x08D3, 0x08E1);
-	addToTashkeel(0x08E3, 0x08FF);
-	addToTashkeel(0xFE70, 0xFE7F);
-	var lineBreakers = '\u0627\u0629\u0648\u06C0\u06CF\u06FD\u06FE\u076B\u076C\u0771\u0773\u0774\u0778\u0779\u08E2\u08B1\u08B2\u08B9';
-	exports.lineBreakers = lineBreakers;
-	function addToLineBreakers(start, finish) {
-	    for (var i = start; i <= finish; i++) {
-	        exports.lineBreakers = lineBreakers += String.fromCharCode(i);
-	    }
-	}
-	addToLineBreakers(0x0600, 0x061F); // it's OK to include tashkeel in this range as it is ignored
-	addToLineBreakers(0x0621, 0x0625);
-	addToLineBreakers(0x062F, 0x0632);
-	addToLineBreakers(0x0660, 0x066D); // numerals, math
-	addToLineBreakers(0x0671, 0x0677);
-	addToLineBreakers(0x0688, 0x0699);
-	addToLineBreakers(0x06C3, 0x06CB);
-	addToLineBreakers(0x06D2, 0x06F9);
-	addToLineBreakers(0x0759, 0x075B);
-	addToLineBreakers(0x08AA, 0x08AE);
-	addToLineBreakers(0xFB50, 0xFDFD); // presentation forms look like they could connect, but never do
-	// Presentation Forms A includes diacritics but they are meant to stand alone
-	addToLineBreakers(0xFE80, 0xFEFC); // presentation forms look like they could connect, but never do
-	// numerals, math
-	addToLineBreakers(0x10E60, 0x10E7F);
-	addToLineBreakers(0x1EC70, 0x1ECBF);
-	addToLineBreakers(0x1EE00, 0x1EEFF);
-	});
-
-	var GlyphSplitter_1 = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-
-
-	function GlyphSplitter(word) {
-	    var letters = [];
-	    var lastLetter = '';
-	    word.split('').forEach(function (letter) {
-	        if (isArabic_1.isArabic(letter)) {
-	            if (reference.tashkeel.indexOf(letter) > -1) {
-	                letters[letters.length - 1] += letter;
-	            }
-	            else if (lastLetter.length && ((reference.lams.indexOf(lastLetter) === 0 && reference.alefs.indexOf(letter) > -1) || (reference.lams.indexOf(lastLetter) > 0 && reference.alefs.indexOf(letter) === 0))) {
-	                // valid LA forms
-	                letters[letters.length - 1] += letter;
-	            }
-	            else {
-	                letters.push(letter);
-	            }
-	        }
-	        else {
-	            letters.push(letter);
-	        }
-	        if (reference.tashkeel.indexOf(letter) === -1) {
-	            lastLetter = letter;
-	        }
-	    });
-	    return letters;
-	}
-	exports.GlyphSplitter = GlyphSplitter;
-	});
-
-	var BaselineSplitter_1 = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-
-
-	function BaselineSplitter(word) {
-	    var letters = [];
-	    var lastLetter = '';
-	    word.split('').forEach(function (letter) {
-	        if (isArabic_1.isArabic(letter) && isArabic_1.isArabic(lastLetter)) {
-	            if (lastLetter.length && reference.tashkeel.indexOf(letter) > -1) {
-	                letters[letters.length - 1] += letter;
-	            }
-	            else if (reference.lineBreakers.indexOf(lastLetter) > -1) {
-	                letters.push(letter);
-	            }
-	            else {
-	                letters[letters.length - 1] += letter;
-	            }
-	        }
-	        else {
-	            letters.push(letter);
-	        }
-	        if (reference.tashkeel.indexOf(letter) === -1) {
-	            // don't allow tashkeel to hide line break
-	            lastLetter = letter;
-	        }
-	    });
-	    return letters;
-	}
-	exports.BaselineSplitter = BaselineSplitter;
-	});
-
-	var Normalization = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-
-
-
-
-	function Normal(word, breakPresentationForm) {
-	    // default is to turn initial/isolated/medial/final presentation form to generic
-	    if (typeof breakPresentationForm === 'undefined') {
-	        breakPresentationForm = true;
-	    }
-	    var returnable = '';
-	    word.split('').forEach(function (letter) {
-	        if (!isArabic_1.isArabic(letter)) {
-	            returnable += letter;
-	            return;
-	        }
-	        for (var w = 0; w < reference.letterList.length; w++) {
-	            // ok so we are checking this potential lettertron
-	            var letterForms = unicodeArabic.default[reference.letterList[w]];
-	            var versions = Object.keys(letterForms);
-	            for (var v = 0; v < versions.length; v++) {
-	                var localVersion = letterForms[versions[v]];
-	                if (typeof localVersion === 'object' && typeof localVersion.indexOf === 'undefined') {
-	                    // look at this embedded object
-	                    var embeddedForms = Object.keys(localVersion);
-	                    for (var ef = 0; ef < embeddedForms.length; ef++) {
-	                        var form = localVersion[embeddedForms[ef]];
-	                        if (form === letter || (typeof form === 'object' && form.indexOf && form.indexOf(letter) > -1)) {
-	                            // match
-	                            // console.log('embedded match');
-	                            if (form === letter) {
-	                                // match exact
-	                                if (breakPresentationForm && localVersion['normal'] && ['isolated', 'initial', 'medial', 'final'].indexOf(embeddedForms[ef]) > -1) {
-	                                    // replace presentation form
-	                                    // console.log('keeping normal form of the letter');
-	                                    if (typeof localVersion['normal'] === 'object') {
-	                                        returnable += localVersion['normal'][0];
-	                                    }
-	                                    else {
-	                                        returnable += localVersion['normal'];
-	                                    }
-	                                    return;
-	                                }
-	                                // console.log('keeping this letter');
-	                                returnable += letter;
-	                                return;
-	                            }
-	                            else if (typeof form === 'object' && form.indexOf && form.indexOf(letter) > -1) {
-	                                // match
-	                                returnable += form[0];
-	                                // console.log('added the first letter from the same array');
-	                                return;
-	                            }
-	                        }
-	                    }
-	                }
-	                else if (localVersion === letter) {
-	                    // match exact
-	                    if (breakPresentationForm && letterForms['normal'] && ['isolated', 'initial', 'medial', 'final'].indexOf(versions[v]) > -1) {
-	                        // replace presentation form
-	                        // console.log('keeping normal form of the letter');
-	                        if (typeof letterForms['normal'] === 'object') {
-	                            returnable += letterForms['normal'][0];
-	                        }
-	                        else {
-	                            returnable += letterForms['normal'];
-	                        }
-	                        return;
-	                    }
-	                    // console.log('keeping this letter');
-	                    returnable += letter;
-	                    return;
-	                }
-	                else if (typeof localVersion === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
-	                    // match
-	                    returnable += localVersion[0];
-	                    // console.log('added the first letter from the same array');
-	                    return;
-	                }
-	            }
-	        }
-	        // try ligatures
-	        for (var v2 = 0; v2 < reference.ligatureList.length; v2++) {
-	            var normalForm = reference.ligatureList[v2];
-	            if (normalForm !== 'words') {
-	                var ligForms = Object.keys(unicodeLigatures.default[normalForm]);
-	                for (var f = 0; f < ligForms.length; f++) {
-	                    if (unicodeLigatures.default[normalForm][ligForms[f]] === letter) {
-	                        returnable += normalForm;
-	                        return;
-	                    }
-	                }
-	            }
-	        }
-	        // try words ligatures
-	        for (var v3 = 0; v3 < reference.ligatureWordList.length; v3++) {
-	            var normalForm$1 = reference.ligatureWordList[v3];
-	            if (unicodeLigatures.default.words[normalForm$1] === letter) {
-	                returnable += normalForm$1;
-	                return;
-	            }
-	        }
-	        returnable += letter;
-	        // console.log('kept the letter')
-	    });
-	    return returnable;
-	}
-	exports.Normal = Normal;
-	});
-
-	var CharShaper_1 = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-
-
-
-	function CharShaper(letter, form) {
-	    if (!isArabic_1.isArabic(letter)) {
-	        // fail not Arabic
-	        throw new Error('Not Arabic');
-	    }
-	    if (letter === "\u0621") {
-	        // hamza alone
-	        return "\u0621";
-	    }
-	    for (var w = 0; w < reference.letterList.length; w++) {
-	        // ok so we are checking this potential lettertron
-	        var letterForms = unicodeArabic.default[reference.letterList[w]];
-	        var versions = Object.keys(letterForms);
-	        for (var v = 0; v < versions.length; v++) {
-	            var localVersion = letterForms[versions[v]];
-	            if ((localVersion === letter) ||
-	                (typeof localVersion === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1)) {
-	                if (versions.indexOf(form) > -1) {
-	                    return letterForms[form];
-	                }
-	            }
-	            else if (typeof localVersion === 'object' && typeof localVersion.indexOf === 'undefined') {
-	                // check embedded
-	                var embeddedVersions = Object.keys(localVersion);
-	                for (var ev = 0; ev < embeddedVersions.length; ev++) {
-	                    if ((localVersion[embeddedVersions[ev]] === letter) ||
-	                        (typeof localVersion[embeddedVersions[ev]] === 'object' && localVersion[embeddedVersions[ev]].indexOf && localVersion[embeddedVersions[ev]].indexOf(letter) > -1)) {
-	                        if (embeddedVersions.indexOf(form) > -1) {
-	                            return localVersion[form];
-	                        }
-	                    }
-	                }
-	            }
-	        }
-	    }
-	}
-	exports.CharShaper = CharShaper;
-	});
-
-	var WordShaper_1 = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-
-
-
-
-	function WordShaper(word) {
-	    var state = 'initial';
-	    var output = '';
-	    for (var w = 0; w < word.length; w++) {
-	        var nextLetter = ' ';
-	        for (var nxw = w + 1; nxw < word.length; nxw++) {
-	            if (!isArabic_1.isArabic(word[nxw])) {
-	                break;
-	            }
-	            if (reference.tashkeel.indexOf(word[nxw]) === -1) {
-	                nextLetter = word[nxw];
-	                break;
-	            }
-	        }
-	        if (!isArabic_1.isArabic(word[w]) || isArabic_1.isMath(word[w])) {
-	            // space or other non-Arabic
-	            output += word[w];
-	            state = 'initial';
-	        }
-	        else if (reference.tashkeel.indexOf(word[w]) > -1) {
-	            // tashkeel - add without changing state
-	            output += word[w];
-	        }
-	        else if ((nextLetter === ' ') // last Arabic letter in this word
-	            || (reference.lineBreakers.indexOf(word[w]) > -1)) { // the current letter is known to break lines
-	            output += CharShaper_1.CharShaper(word[w], state === 'initial' ? 'isolated' : 'final');
-	            state = 'initial';
-	        }
-	        else if (reference.lams.indexOf(word[w]) > -1 && reference.alefs.indexOf(nextLetter) > -1) {
-	            // LA letters - advance an additional letter after this
-	            output += unicodeLigatures.default[word[w] + nextLetter][(state === 'initial' ? 'isolated' : 'final')];
-	            while (word[w] !== nextLetter) {
-	                w++;
-	            }
-	            state = 'initial';
-	        }
-	        else {
-	            output += CharShaper_1.CharShaper(word[w], state);
-	            state = 'medial';
-	        }
-	    }
-	    return output;
-	}
-	exports.WordShaper = WordShaper;
-	});
-
-	var ParentLetter_1 = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-
-
-
-	function ParentLetter(letter) {
-	    if (!isArabic_1.isArabic(letter)) {
-	        throw new Error('Not an Arabic letter');
-	    }
-	    for (var w = 0; w < reference.letterList.length; w++) {
-	        // ok so we are checking this potential lettertron
-	        var letterForms = unicodeArabic.default[reference.letterList[w]];
-	        var versions = Object.keys(letterForms);
-	        for (var v = 0; v < versions.length; v++) {
-	            var localVersion = letterForms[versions[v]];
-	            if (typeof localVersion === 'object' && typeof localVersion.indexOf === 'undefined') {
-	                // look at this embedded object
-	                var embeddedForms = Object.keys(localVersion);
-	                for (var ef = 0; ef < embeddedForms.length; ef++) {
-	                    var form = localVersion[embeddedForms[ef]];
-	                    if (form === letter || (typeof form === 'object' && form.indexOf && form.indexOf(letter) > -1)) {
-	                        // match
-	                        return localVersion;
-	                    }
-	                }
-	            }
-	            else if (localVersion === letter || (typeof localVersion === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1)) {
-	                // match
-	                return letterForms;
-	            }
-	        }
-	        return null;
-	    }
-	}
-	exports.ParentLetter = ParentLetter;
-	function GrandparentLetter(letter) {
-	    if (!isArabic_1.isArabic(letter)) {
-	        throw new Error('Not an Arabic letter');
-	    }
-	    for (var w = 0; w < reference.letterList.length; w++) {
-	        // ok so we are checking this potential lettertron
-	        var letterForms = unicodeArabic.default[reference.letterList[w]];
-	        var versions = Object.keys(letterForms);
-	        for (var v = 0; v < versions.length; v++) {
-	            var localVersion = letterForms[versions[v]];
-	            if (typeof localVersion === 'object' && typeof localVersion.indexOf === 'undefined') {
-	                // look at this embedded object
-	                var embeddedForms = Object.keys(localVersion);
-	                for (var ef = 0; ef < embeddedForms.length; ef++) {
-	                    var form = localVersion[embeddedForms[ef]];
-	                    if (form === letter || (typeof form === 'object' && form.indexOf && form.indexOf(letter) > -1)) {
-	                        // match
-	                        return letterForms;
-	                    }
-	                }
-	            }
-	            else if (localVersion === letter || (typeof localVersion === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1)) {
-	                // match
-	                return letterForms;
-	            }
-	        }
-	        return null;
-	    }
-	}
-	exports.GrandparentLetter = GrandparentLetter;
-	});
-
-	var lib$1 = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-
-	exports.isArabic = isArabic_1.isArabic;
-
-	exports.GlyphSplitter = GlyphSplitter_1.GlyphSplitter;
-
-	exports.BaselineSplitter = BaselineSplitter_1.BaselineSplitter;
-
-	exports.Normal = Normalization.Normal;
-
-	exports.CharShaper = CharShaper_1.CharShaper;
-
-	exports.WordShaper = WordShaper_1.WordShaper;
-
-	exports.ParentLetter = ParentLetter_1.ParentLetter;
-	exports.GrandparentLetter = ParentLetter_1.GrandparentLetter;
-	});
-
-	// see https://github.com/openstreetmap/iD/pull/3707
-
-	var rtlRegex = /[\u0590-\u05FF\u0600-\u06FF\u0750-\u07BF\u08A0–\u08BF]/;
-
-	function fixRTLTextForSvg(inputText) {
-	    var ret = '', rtlBuffer = [];
-	    var arabicRegex = /[\u0600-\u06FF]/g;
-	    var arabicDiacritics = /[\u0610-\u061A\u064B-\u065F\u0670\u06D6-\u06ED]/g;
-	    var arabicMath = /[\u0660-\u066C\u06F0-\u06F9]+/g;
-	    var thaanaVowel = /[\u07A6-\u07B0]/;
-	    var hebrewSign = /[\u0591-\u05bd\u05bf\u05c1-\u05c5\u05c7]/;
-
-	    // Arabic word shaping
-	    if (arabicRegex.test(inputText)) {
-	        inputText = lib$1.WordShaper(inputText);
-	    }
-
-	    for (var n = 0; n < inputText.length; n++) {
-	        var c = inputText[n];
-	        if (arabicMath.test(c)) {
-	            // Arabic numbers go LTR
-	            ret += rtlBuffer.reverse().join('');
-	            rtlBuffer = [c];
-	        } else {
-	            if (rtlBuffer.length && arabicMath.test(rtlBuffer[rtlBuffer.length - 1])) {
-	                ret += rtlBuffer.reverse().join('');
-	                rtlBuffer = [];
-	            }
-	            if ((thaanaVowel.test(c) || hebrewSign.test(c) || arabicDiacritics.test(c)) && rtlBuffer.length) {
-	                rtlBuffer[rtlBuffer.length - 1] += c;
-	            } else if (rtlRegex.test(c)
-	                // include Arabic presentation forms
-	                || (c.charCodeAt(0) >= 64336 && c.charCodeAt(0) <= 65023)
-	                || (c.charCodeAt(0) >= 65136 && c.charCodeAt(0) <= 65279)) {
-	                rtlBuffer.push(c);
-	            } else if (c === ' ' && rtlBuffer.length) {
-	                // whitespace within RTL text
-	                rtlBuffer = [rtlBuffer.reverse().join('') + ' '];
-	            } else {
-	                // non-RTL character
-	                ret += rtlBuffer.reverse().join('') + c;
-	                rtlBuffer = [];
-	            }
-	        }
-	    }
-	    ret += rtlBuffer.reverse().join('');
-	    return ret;
-	}
-
-	// https://github.com/openstreetmap/iD/issues/772
-	// http://mathiasbynens.be/notes/localstorage-pattern#comment-9
-	var _storage;
-	try { _storage = localStorage; } catch (e) {}  // eslint-disable-line no-empty
-	_storage = _storage || (function () {
-	  var s = {};
-	  return {
-	    getItem: function (k) { return s[k]; },
-	    setItem: function (k, v) { return s[k] = v; },
-	    removeItem: function (k) { return delete s[k]; }
-	  };
-	})();
-
-	//
-	// corePreferences is an interface for persisting basic key-value strings
-	// within and between iD sessions on the same site.
-	//
-	function corePreferences(k, v) {
-
-	  try {
-	    if (arguments.length === 1) { return _storage.getItem(k); }
-	    else if (v === null) { _storage.removeItem(k); }
-	    else { _storage.setItem(k, v); }
-	  } catch (e) {
-	    /* eslint-disable no-console */
-	    if (typeof console !== 'undefined') {
-	      console.error('localStorage quota exceeded');
-	    }
-	    /* eslint-enable no-console */
-	  }
-
-	}
-
-	function responseText(response) {
-	  if (!response.ok) { throw new Error(response.status + " " + response.statusText); }
-	  return response.text();
-	}
-
-	function d3_text(input, init) {
-	  return fetch(input, init).then(responseText);
-	}
-
-	function responseJson(response) {
-	  if (!response.ok) { throw new Error(response.status + " " + response.statusText); }
-	  if (response.status === 204 || response.status === 205) { return; }
-	  return response.json();
-	}
-
-	function d3_json(input, init) {
-	  return fetch(input, init).then(responseJson);
-	}
-
-	function parser(type) {
-	  return function(input, init)  {
-	    return d3_text(input, init).then(function(text) {
-	      return (new DOMParser).parseFromString(text, type);
-	    });
-	  };
-	}
-
-	var d3_xml = parser("application/xml");
-
-	var svg = parser("image/svg+xml");
-
-	var _mainFileFetcher = coreFileFetcher(); // singleton
-
-	//
-	// coreFileFetcher asynchronously fetches data from JSON files
-	//
-	function coreFileFetcher() {
-	  var _this = {};
-	  var _inflight = {};
-	  var _fileMap = {
-	    'address_formats': 'data/address_formats.min.json',
-	    'deprecated': 'data/deprecated.min.json',
-	    'discarded': 'data/discarded.min.json',
-	    'imagery': 'data/imagery.min.json',
-	    'intro_graph': 'data/intro_graph.min.json',
-	    'keepRight': 'data/keepRight.min.json',
-	    'languages': 'data/languages.min.json',
-	    'locales': 'data/locales.min.json',
-	    'nsi_brands': 'https://cdn.jsdelivr.net/npm/name-suggestion-index@4/dist/brands.min.json',
-	    'nsi_filters': 'https://cdn.jsdelivr.net/npm/name-suggestion-index@4/dist/filters.min.json',
-	    'oci_features': 'https://cdn.jsdelivr.net/npm/osm-community-index@2/dist/features.min.json',
-	    'oci_resources': 'https://cdn.jsdelivr.net/npm/osm-community-index@2/dist/resources.min.json',
-	    'preset_categories': 'data/preset_categories.min.json',
-	    'preset_defaults': 'data/preset_defaults.min.json',
-	    'preset_fields': 'data/preset_fields.min.json',
-	    'preset_presets': 'data/preset_presets.min.json',
-	    'phone_formats': 'data/phone_formats.min.json',
-	    'qa_data': 'data/qa_data.min.json',
-	    'shortcuts': 'data/shortcuts.min.json',
-	    'territory_languages': 'data/territory_languages.min.json',
-	    'wmf_sitematrix': 'https://cdn.jsdelivr.net/npm/wmf-sitematrix@0.1/wikipedia.min.json'
-	  };
-
-	  var _cachedData = {};
-	  // expose the cache; useful for tests
-	  _this.cache = function () { return _cachedData; };
-
-
-	  // Returns a Promise to fetch data
-	  // (resolved with the data if we have it already)
-	  _this.get = function (which) {
-	    if (_cachedData[which]) {
-	      return Promise.resolve(_cachedData[which]);
-	    }
-
-	    var file = _fileMap[which];
-	    var url = file && _this.asset(file);
-	    if (!url) {
-	      return Promise.reject(("Unknown data file for \"" + which + "\""));
-	    }
-
-	    var prom = _inflight[url];
-	    if (!prom) {
-	      _inflight[url] = prom = d3_json(url)
-	        .then(function (result) {
-	          delete _inflight[url];
-	          if (!result) {
-	            throw new Error(("No data loaded for \"" + which + "\""));
-	          }
-	          _cachedData[which] = result;
-	          return result;
-	        })
-	        .catch(function (err) {
-	          delete _inflight[url];
-	          throw err;
-	        });
-	    }
-
-	    return prom;
-	  };
-
-
-	  // Accessor for the file map
-	  _this.fileMap = function(val) {
-	    if (!arguments.length) { return _fileMap; }
-	    _fileMap = val;
-	    return _this;
-	  };
-
-	  var _assetPath = '';
-	  _this.assetPath = function(val) {
-	    if (!arguments.length) { return _assetPath; }
-	    _assetPath = val;
-	    return _this;
-	  };
-
-	  var _assetMap = {};
-	  _this.assetMap = function(val) {
-	    if (!arguments.length) { return _assetMap; }
-	    _assetMap = val;
-	    return _this;
-	  };
-
-	  _this.asset = function (val) {
-	    if (/^http(s)?:\/\//i.test(val)) { return val; }
-	    var filename = _assetPath + val;
-	    return _assetMap[filename] || filename;
-	  };
-
-	  return _this;
-	}
-
-	var _detected;
-
-	function utilDetect(refresh) {
-	  if (_detected && !refresh) { return _detected; }
-	  _detected = {};
-
-	  var ua = navigator.userAgent;
-	  var m = null;
-
-	  /* Browser */
-	  m = ua.match(/(edge)\/?\s*(\.?\d+(\.\d+)*)/i);   // Edge
-	  if (m !== null) {
-	    _detected.browser = m[1];
-	    _detected.version = m[2];
-	  }
-	  if (!_detected.browser) {
-	    m = ua.match(/Trident\/.*rv:([0-9]{1,}[\.0-9]{0,})/i);   // IE11
-	    if (m !== null) {
-	      _detected.browser = 'msie';
-	      _detected.version = m[1];
-	    }
-	  }
-	  if (!_detected.browser) {
-	    m = ua.match(/(opr)\/?\s*(\.?\d+(\.\d+)*)/i);   // Opera 15+
-	    if (m !== null) {
-	      _detected.browser = 'Opera';
-	      _detected.version = m[2];
-	    }
-	  }
-	  if (!_detected.browser) {
-	    m = ua.match(/(opera|chrome|safari|firefox|msie)\/?\s*(\.?\d+(\.\d+)*)/i);
-	    if (m !== null) {
-	      _detected.browser = m[1];
-	      _detected.version = m[2];
-	      m = ua.match(/version\/([\.\d]+)/i);
-	      if (m !== null) { _detected.version = m[1]; }
-	    }
-	  }
-	  if (!_detected.browser) {
-	    _detected.browser = navigator.appName;
-	    _detected.version = navigator.appVersion;
-	  }
-
-	  // keep major.minor version only..
-	  _detected.version = _detected.version.split(/\W/).slice(0,2).join('.');
-
-	  // detect other browser capabilities
-	  // Legacy Opera has incomplete svg style support. See #715
-	  _detected.opera = (_detected.browser.toLowerCase() === 'opera' && parseFloat(_detected.version) < 15 );
-
-	  if (_detected.browser.toLowerCase() === 'msie') {
-	    _detected.ie = true;
-	    _detected.browser = 'Internet Explorer';
-	    _detected.support = parseFloat(_detected.version) >= 11;
-	  } else {
-	    _detected.ie = false;
-	    _detected.support = true;
-	  }
-
-	  _detected.filedrop = (window.FileReader && 'ondrop' in window);
-	  _detected.download = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
-	  _detected.cssfilters = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
-
-
-	  /* Platform */
-	  if (/Win/.test(ua)) {
-	    _detected.os = 'win';
-	    _detected.platform = 'Windows';
-	  } else if (/Mac/.test(ua)) {
-	    _detected.os = 'mac';
-	    _detected.platform = 'Macintosh';
-	  } else if (/X11/.test(ua) || /Linux/.test(ua)) {
-	    _detected.os = 'linux';
-	    _detected.platform = 'Linux';
-	  } else {
-	    _detected.os = 'win';
-	    _detected.platform = 'Unknown';
-	  }
-
-	  _detected.isMobileWebKit = (/\b(iPad|iPhone|iPod)\b/.test(ua) ||
-	    // HACK: iPadOS 13+ requests desktop sites by default by using a Mac user agent,
-	    // so assume any "mac" with multitouch is actually iOS
-	    (navigator.platform === 'MacIntel' && 'maxTouchPoints' in navigator && navigator.maxTouchPoints > 1)) &&
-	    /WebKit/.test(ua) &&
-	    !/Edge/.test(ua) &&
-	    !window.MSStream;
-
-
-	  /* Locale */
-	  // An array of locales requested by the browser in priority order.
-	  _detected.browserLocales = Array.from(new Set( // remove duplicates
-	      [navigator.language]
-	        .concat(navigator.languages || [])
-	        .concat([
-	            // old property for backwards compatibility
-	            navigator.userLanguage,
-	            // fallback to English
-	            'en'
-	        ])
-	        // remove any undefined values
-	        .filter(Boolean)
-	    ));
-
-
-	  /* Host */
-	  var loc = window.top.location;
-	  var origin = loc.origin;
-	  if (!origin) {  // for unpatched IE11
-	    origin = loc.protocol + '//' + loc.hostname + (loc.port ? ':' + loc.port: '');
-	  }
-
-	  _detected.host = origin + loc.pathname;
-
-
-	  return _detected;
-	}
-
-	var aesJs = createCommonjsModule(function (module, exports) {
-	/*! MIT License. Copyright 2015-2018 Richard Moore <me@ricmoo.com>. See LICENSE.txt. */
-	(function(root) {
-
-	    function checkInt(value) {
-	        return (parseInt(value) === value);
-	    }
-
-	    function checkInts(arrayish) {
-	        if (!checkInt(arrayish.length)) { return false; }
-
-	        for (var i = 0; i < arrayish.length; i++) {
-	            if (!checkInt(arrayish[i]) || arrayish[i] < 0 || arrayish[i] > 255) {
-	                return false;
-	            }
-	        }
-
-	        return true;
-	    }
-
-	    function coerceArray(arg, copy) {
-
-	        // ArrayBuffer view
-	        if (arg.buffer && arg.name === 'Uint8Array') {
-
-	            if (copy) {
-	                if (arg.slice) {
-	                    arg = arg.slice();
-	                } else {
-	                    arg = Array.prototype.slice.call(arg);
-	                }
-	            }
-
-	            return arg;
-	        }
-
-	        // It's an array; check it is a valid representation of a byte
-	        if (Array.isArray(arg)) {
-	            if (!checkInts(arg)) {
-	                throw new Error('Array contains invalid value: ' + arg);
-	            }
-
-	            return new Uint8Array(arg);
-	        }
-
-	        // Something else, but behaves like an array (maybe a Buffer? Arguments?)
-	        if (checkInt(arg.length) && checkInts(arg)) {
-	            return new Uint8Array(arg);
-	        }
-
-	        throw new Error('unsupported array-like object');
-	    }
-
-	    function createArray(length) {
-	        return new Uint8Array(length);
-	    }
-
-	    function copyArray(sourceArray, targetArray, targetStart, sourceStart, sourceEnd) {
-	        if (sourceStart != null || sourceEnd != null) {
-	            if (sourceArray.slice) {
-	                sourceArray = sourceArray.slice(sourceStart, sourceEnd);
-	            } else {
-	                sourceArray = Array.prototype.slice.call(sourceArray, sourceStart, sourceEnd);
-	            }
-	        }
-	        targetArray.set(sourceArray, targetStart);
-	    }
-
-
-
-	    var convertUtf8 = (function() {
-	        function toBytes(text) {
-	            var result = [], i = 0;
-	            text = encodeURI(text);
-	            while (i < text.length) {
-	                var c = text.charCodeAt(i++);
-
-	                // if it is a % sign, encode the following 2 bytes as a hex value
-	                if (c === 37) {
-	                    result.push(parseInt(text.substr(i, 2), 16));
-	                    i += 2;
-
-	                // otherwise, just the actual byte
-	                } else {
-	                    result.push(c);
-	                }
-	            }
-
-	            return coerceArray(result);
-	        }
-
-	        function fromBytes(bytes) {
-	            var result = [], i = 0;
-
-	            while (i < bytes.length) {
-	                var c = bytes[i];
-
-	                if (c < 128) {
-	                    result.push(String.fromCharCode(c));
-	                    i++;
-	                } else if (c > 191 && c < 224) {
-	                    result.push(String.fromCharCode(((c & 0x1f) << 6) | (bytes[i + 1] & 0x3f)));
-	                    i += 2;
-	                } else {
-	                    result.push(String.fromCharCode(((c & 0x0f) << 12) | ((bytes[i + 1] & 0x3f) << 6) | (bytes[i + 2] & 0x3f)));
-	                    i += 3;
-	                }
-	            }
-
-	            return result.join('');
-	        }
-
-	        return {
-	            toBytes: toBytes,
-	            fromBytes: fromBytes,
-	        }
-	    })();
-
-	    var convertHex = (function() {
-	        function toBytes(text) {
-	            var result = [];
-	            for (var i = 0; i < text.length; i += 2) {
-	                result.push(parseInt(text.substr(i, 2), 16));
-	            }
-
-	            return result;
-	        }
-
-	        // http://ixti.net/development/javascript/2011/11/11/base64-encodedecode-of-utf8-in-browser-with-js.html
-	        var Hex = '0123456789abcdef';
-
-	        function fromBytes(bytes) {
-	                var result = [];
-	                for (var i = 0; i < bytes.length; i++) {
-	                    var v = bytes[i];
-	                    result.push(Hex[(v & 0xf0) >> 4] + Hex[v & 0x0f]);
-	                }
-	                return result.join('');
-	        }
-
-	        return {
-	            toBytes: toBytes,
-	            fromBytes: fromBytes,
-	        }
-	    })();
-
-
-	    // Number of rounds by keysize
-	    var numberOfRounds = {16: 10, 24: 12, 32: 14};
-
-	    // Round constant words
-	    var rcon = [0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91];
-
-	    // S-box and Inverse S-box (S is for Substitution)
-	    var S = [0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16];
-	    var Si =[0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb, 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25, 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92, 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84, 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06, 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73, 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e, 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b, 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4, 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f, 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef, 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d];
-
-	    // Transformations for encryption
-	    var T1 = [0xc66363a5, 0xf87c7c84, 0xee777799, 0xf67b7b8d, 0xfff2f20d, 0xd66b6bbd, 0xde6f6fb1, 0x91c5c554, 0x60303050, 0x02010103, 0xce6767a9, 0x562b2b7d, 0xe7fefe19, 0xb5d7d762, 0x4dababe6, 0xec76769a, 0x8fcaca45, 0x1f82829d, 0x89c9c940, 0xfa7d7d87, 0xeffafa15, 0xb25959eb, 0x8e4747c9, 0xfbf0f00b, 0x41adadec, 0xb3d4d467, 0x5fa2a2fd, 0x45afafea, 0x239c9cbf, 0x53a4a4f7, 0xe4727296, 0x9bc0c05b, 0x75b7b7c2, 0xe1fdfd1c, 0x3d9393ae, 0x4c26266a, 0x6c36365a, 0x7e3f3f41, 0xf5f7f702, 0x83cccc4f, 0x6834345c, 0x51a5a5f4, 0xd1e5e534, 0xf9f1f108, 0xe2717193, 0xabd8d873, 0x62313153, 0x2a15153f, 0x0804040c, 0x95c7c752, 0x46232365, 0x9dc3c35e, 0x30181828, 0x379696a1, 0x0a05050f, 0x2f9a9ab5, 0x0e070709, 0x24121236, 0x1b80809b, 0xdfe2e23d, 0xcdebeb26, 0x4e272769, 0x7fb2b2cd, 0xea75759f, 0x1209091b, 0x1d83839e, 0x582c2c74, 0x341a1a2e, 0x361b1b2d, 0xdc6e6eb2, 0xb45a5aee, 0x5ba0a0fb, 0xa45252f6, 0x763b3b4d, 0xb7d6d661, 0x7db3b3ce, 0x5229297b, 0xdde3e33e, 0x5e2f2f71, 0x13848497, 0xa65353f5, 0xb9d1d168, 0x00000000, 0xc1eded2c, 0x40202060, 0xe3fcfc1f, 0x79b1b1c8, 0xb65b5bed, 0xd46a6abe, 0x8dcbcb46, 0x67bebed9, 0x7239394b, 0x944a4ade, 0x984c4cd4, 0xb05858e8, 0x85cfcf4a, 0xbbd0d06b, 0xc5efef2a, 0x4faaaae5, 0xedfbfb16, 0x864343c5, 0x9a4d4dd7, 0x66333355, 0x11858594, 0x8a4545cf, 0xe9f9f910, 0x04020206, 0xfe7f7f81, 0xa05050f0, 0x783c3c44, 0x259f9fba, 0x4ba8a8e3, 0xa25151f3, 0x5da3a3fe, 0x804040c0, 0x058f8f8a, 0x3f9292ad, 0x219d9dbc, 0x70383848, 0xf1f5f504, 0x63bcbcdf, 0x77b6b6c1, 0xafdada75, 0x42212163, 0x20101030, 0xe5ffff1a, 0xfdf3f30e, 0xbfd2d26d, 0x81cdcd4c, 0x180c0c14, 0x26131335, 0xc3ecec2f, 0xbe5f5fe1, 0x359797a2, 0x884444cc, 0x2e171739, 0x93c4c457, 0x55a7a7f2, 0xfc7e7e82, 0x7a3d3d47, 0xc86464ac, 0xba5d5de7, 0x3219192b, 0xe6737395, 0xc06060a0, 0x19818198, 0x9e4f4fd1, 0xa3dcdc7f, 0x44222266, 0x542a2a7e, 0x3b9090ab, 0x0b888883, 0x8c4646ca, 0xc7eeee29, 0x6bb8b8d3, 0x2814143c, 0xa7dede79, 0xbc5e5ee2, 0x160b0b1d, 0xaddbdb76, 0xdbe0e03b, 0x64323256, 0x743a3a4e, 0x140a0a1e, 0x924949db, 0x0c06060a, 0x4824246c, 0xb85c5ce4, 0x9fc2c25d, 0xbdd3d36e, 0x43acacef, 0xc46262a6, 0x399191a8, 0x319595a4, 0xd3e4e437, 0xf279798b, 0xd5e7e732, 0x8bc8c843, 0x6e373759, 0xda6d6db7, 0x018d8d8c, 0xb1d5d564, 0x9c4e4ed2, 0x49a9a9e0, 0xd86c6cb4, 0xac5656fa, 0xf3f4f407, 0xcfeaea25, 0xca6565af, 0xf47a7a8e, 0x47aeaee9, 0x10080818, 0x6fbabad5, 0xf0787888, 0x4a25256f, 0x5c2e2e72, 0x381c1c24, 0x57a6a6f1, 0x73b4b4c7, 0x97c6c651, 0xcbe8e823, 0xa1dddd7c, 0xe874749c, 0x3e1f1f21, 0x964b4bdd, 0x61bdbddc, 0x0d8b8b86, 0x0f8a8a85, 0xe0707090, 0x7c3e3e42, 0x71b5b5c4, 0xcc6666aa, 0x904848d8, 0x06030305, 0xf7f6f601, 0x1c0e0e12, 0xc26161a3, 0x6a35355f, 0xae5757f9, 0x69b9b9d0, 0x17868691, 0x99c1c158, 0x3a1d1d27, 0x279e9eb9, 0xd9e1e138, 0xebf8f813, 0x2b9898b3, 0x22111133, 0xd26969bb, 0xa9d9d970, 0x078e8e89, 0x339494a7, 0x2d9b9bb6, 0x3c1e1e22, 0x15878792, 0xc9e9e920, 0x87cece49, 0xaa5555ff, 0x50282878, 0xa5dfdf7a, 0x038c8c8f, 0x59a1a1f8, 0x09898980, 0x1a0d0d17, 0x65bfbfda, 0xd7e6e631, 0x844242c6, 0xd06868b8, 0x824141c3, 0x299999b0, 0x5a2d2d77, 0x1e0f0f11, 0x7bb0b0cb, 0xa85454fc, 0x6dbbbbd6, 0x2c16163a];
-	    var T2 = [0xa5c66363, 0x84f87c7c, 0x99ee7777, 0x8df67b7b, 0x0dfff2f2, 0xbdd66b6b, 0xb1de6f6f, 0x5491c5c5, 0x50603030, 0x03020101, 0xa9ce6767, 0x7d562b2b, 0x19e7fefe, 0x62b5d7d7, 0xe64dabab, 0x9aec7676, 0x458fcaca, 0x9d1f8282, 0x4089c9c9, 0x87fa7d7d, 0x15effafa, 0xebb25959, 0xc98e4747, 0x0bfbf0f0, 0xec41adad, 0x67b3d4d4, 0xfd5fa2a2, 0xea45afaf, 0xbf239c9c, 0xf753a4a4, 0x96e47272, 0x5b9bc0c0, 0xc275b7b7, 0x1ce1fdfd, 0xae3d9393, 0x6a4c2626, 0x5a6c3636, 0x417e3f3f, 0x02f5f7f7, 0x4f83cccc, 0x5c683434, 0xf451a5a5, 0x34d1e5e5, 0x08f9f1f1, 0x93e27171, 0x73abd8d8, 0x53623131, 0x3f2a1515, 0x0c080404, 0x5295c7c7, 0x65462323, 0x5e9dc3c3, 0x28301818, 0xa1379696, 0x0f0a0505, 0xb52f9a9a, 0x090e0707, 0x36241212, 0x9b1b8080, 0x3ddfe2e2, 0x26cdebeb, 0x694e2727, 0xcd7fb2b2, 0x9fea7575, 0x1b120909, 0x9e1d8383, 0x74582c2c, 0x2e341a1a, 0x2d361b1b, 0xb2dc6e6e, 0xeeb45a5a, 0xfb5ba0a0, 0xf6a45252, 0x4d763b3b, 0x61b7d6d6, 0xce7db3b3, 0x7b522929, 0x3edde3e3, 0x715e2f2f, 0x97138484, 0xf5a65353, 0x68b9d1d1, 0x00000000, 0x2cc1eded, 0x60402020, 0x1fe3fcfc, 0xc879b1b1, 0xedb65b5b, 0xbed46a6a, 0x468dcbcb, 0xd967bebe, 0x4b723939, 0xde944a4a, 0xd4984c4c, 0xe8b05858, 0x4a85cfcf, 0x6bbbd0d0, 0x2ac5efef, 0xe54faaaa, 0x16edfbfb, 0xc5864343, 0xd79a4d4d, 0x55663333, 0x94118585, 0xcf8a4545, 0x10e9f9f9, 0x06040202, 0x81fe7f7f, 0xf0a05050, 0x44783c3c, 0xba259f9f, 0xe34ba8a8, 0xf3a25151, 0xfe5da3a3, 0xc0804040, 0x8a058f8f, 0xad3f9292, 0xbc219d9d, 0x48703838, 0x04f1f5f5, 0xdf63bcbc, 0xc177b6b6, 0x75afdada, 0x63422121, 0x30201010, 0x1ae5ffff, 0x0efdf3f3, 0x6dbfd2d2, 0x4c81cdcd, 0x14180c0c, 0x35261313, 0x2fc3ecec, 0xe1be5f5f, 0xa2359797, 0xcc884444, 0x392e1717, 0x5793c4c4, 0xf255a7a7, 0x82fc7e7e, 0x477a3d3d, 0xacc86464, 0xe7ba5d5d, 0x2b321919, 0x95e67373, 0xa0c06060, 0x98198181, 0xd19e4f4f, 0x7fa3dcdc, 0x66442222, 0x7e542a2a, 0xab3b9090, 0x830b8888, 0xca8c4646, 0x29c7eeee, 0xd36bb8b8, 0x3c281414, 0x79a7dede, 0xe2bc5e5e, 0x1d160b0b, 0x76addbdb, 0x3bdbe0e0, 0x56643232, 0x4e743a3a, 0x1e140a0a, 0xdb924949, 0x0a0c0606, 0x6c482424, 0xe4b85c5c, 0x5d9fc2c2, 0x6ebdd3d3, 0xef43acac, 0xa6c46262, 0xa8399191, 0xa4319595, 0x37d3e4e4, 0x8bf27979, 0x32d5e7e7, 0x438bc8c8, 0x596e3737, 0xb7da6d6d, 0x8c018d8d, 0x64b1d5d5, 0xd29c4e4e, 0xe049a9a9, 0xb4d86c6c, 0xfaac5656, 0x07f3f4f4, 0x25cfeaea, 0xafca6565, 0x8ef47a7a, 0xe947aeae, 0x18100808, 0xd56fbaba, 0x88f07878, 0x6f4a2525, 0x725c2e2e, 0x24381c1c, 0xf157a6a6, 0xc773b4b4, 0x5197c6c6, 0x23cbe8e8, 0x7ca1dddd, 0x9ce87474, 0x213e1f1f, 0xdd964b4b, 0xdc61bdbd, 0x860d8b8b, 0x850f8a8a, 0x90e07070, 0x427c3e3e, 0xc471b5b5, 0xaacc6666, 0xd8904848, 0x05060303, 0x01f7f6f6, 0x121c0e0e, 0xa3c26161, 0x5f6a3535, 0xf9ae5757, 0xd069b9b9, 0x91178686, 0x5899c1c1, 0x273a1d1d, 0xb9279e9e, 0x38d9e1e1, 0x13ebf8f8, 0xb32b9898, 0x33221111, 0xbbd26969, 0x70a9d9d9, 0x89078e8e, 0xa7339494, 0xb62d9b9b, 0x223c1e1e, 0x92158787, 0x20c9e9e9, 0x4987cece, 0xffaa5555, 0x78502828, 0x7aa5dfdf, 0x8f038c8c, 0xf859a1a1, 0x80098989, 0x171a0d0d, 0xda65bfbf, 0x31d7e6e6, 0xc6844242, 0xb8d06868, 0xc3824141, 0xb0299999, 0x775a2d2d, 0x111e0f0f, 0xcb7bb0b0, 0xfca85454, 0xd66dbbbb, 0x3a2c1616];
-	    var T3 = [0x63a5c663, 0x7c84f87c, 0x7799ee77, 0x7b8df67b, 0xf20dfff2, 0x6bbdd66b, 0x6fb1de6f, 0xc55491c5, 0x30506030, 0x01030201, 0x67a9ce67, 0x2b7d562b, 0xfe19e7fe, 0xd762b5d7, 0xabe64dab, 0x769aec76, 0xca458fca, 0x829d1f82, 0xc94089c9, 0x7d87fa7d, 0xfa15effa, 0x59ebb259, 0x47c98e47, 0xf00bfbf0, 0xadec41ad, 0xd467b3d4, 0xa2fd5fa2, 0xafea45af, 0x9cbf239c, 0xa4f753a4, 0x7296e472, 0xc05b9bc0, 0xb7c275b7, 0xfd1ce1fd, 0x93ae3d93, 0x266a4c26, 0x365a6c36, 0x3f417e3f, 0xf702f5f7, 0xcc4f83cc, 0x345c6834, 0xa5f451a5, 0xe534d1e5, 0xf108f9f1, 0x7193e271, 0xd873abd8, 0x31536231, 0x153f2a15, 0x040c0804, 0xc75295c7, 0x23654623, 0xc35e9dc3, 0x18283018, 0x96a13796, 0x050f0a05, 0x9ab52f9a, 0x07090e07, 0x12362412, 0x809b1b80, 0xe23ddfe2, 0xeb26cdeb, 0x27694e27, 0xb2cd7fb2, 0x759fea75, 0x091b1209, 0x839e1d83, 0x2c74582c, 0x1a2e341a, 0x1b2d361b, 0x6eb2dc6e, 0x5aeeb45a, 0xa0fb5ba0, 0x52f6a452, 0x3b4d763b, 0xd661b7d6, 0xb3ce7db3, 0x297b5229, 0xe33edde3, 0x2f715e2f, 0x84971384, 0x53f5a653, 0xd168b9d1, 0x00000000, 0xed2cc1ed, 0x20604020, 0xfc1fe3fc, 0xb1c879b1, 0x5bedb65b, 0x6abed46a, 0xcb468dcb, 0xbed967be, 0x394b7239, 0x4ade944a, 0x4cd4984c, 0x58e8b058, 0xcf4a85cf, 0xd06bbbd0, 0xef2ac5ef, 0xaae54faa, 0xfb16edfb, 0x43c58643, 0x4dd79a4d, 0x33556633, 0x85941185, 0x45cf8a45, 0xf910e9f9, 0x02060402, 0x7f81fe7f, 0x50f0a050, 0x3c44783c, 0x9fba259f, 0xa8e34ba8, 0x51f3a251, 0xa3fe5da3, 0x40c08040, 0x8f8a058f, 0x92ad3f92, 0x9dbc219d, 0x38487038, 0xf504f1f5, 0xbcdf63bc, 0xb6c177b6, 0xda75afda, 0x21634221, 0x10302010, 0xff1ae5ff, 0xf30efdf3, 0xd26dbfd2, 0xcd4c81cd, 0x0c14180c, 0x13352613, 0xec2fc3ec, 0x5fe1be5f, 0x97a23597, 0x44cc8844, 0x17392e17, 0xc45793c4, 0xa7f255a7, 0x7e82fc7e, 0x3d477a3d, 0x64acc864, 0x5de7ba5d, 0x192b3219, 0x7395e673, 0x60a0c060, 0x81981981, 0x4fd19e4f, 0xdc7fa3dc, 0x22664422, 0x2a7e542a, 0x90ab3b90, 0x88830b88, 0x46ca8c46, 0xee29c7ee, 0xb8d36bb8, 0x143c2814, 0xde79a7de, 0x5ee2bc5e, 0x0b1d160b, 0xdb76addb, 0xe03bdbe0, 0x32566432, 0x3a4e743a, 0x0a1e140a, 0x49db9249, 0x060a0c06, 0x246c4824, 0x5ce4b85c, 0xc25d9fc2, 0xd36ebdd3, 0xacef43ac, 0x62a6c462, 0x91a83991, 0x95a43195, 0xe437d3e4, 0x798bf279, 0xe732d5e7, 0xc8438bc8, 0x37596e37, 0x6db7da6d, 0x8d8c018d, 0xd564b1d5, 0x4ed29c4e, 0xa9e049a9, 0x6cb4d86c, 0x56faac56, 0xf407f3f4, 0xea25cfea, 0x65afca65, 0x7a8ef47a, 0xaee947ae, 0x08181008, 0xbad56fba, 0x7888f078, 0x256f4a25, 0x2e725c2e, 0x1c24381c, 0xa6f157a6, 0xb4c773b4, 0xc65197c6, 0xe823cbe8, 0xdd7ca1dd, 0x749ce874, 0x1f213e1f, 0x4bdd964b, 0xbddc61bd, 0x8b860d8b, 0x8a850f8a, 0x7090e070, 0x3e427c3e, 0xb5c471b5, 0x66aacc66, 0x48d89048, 0x03050603, 0xf601f7f6, 0x0e121c0e, 0x61a3c261, 0x355f6a35, 0x57f9ae57, 0xb9d069b9, 0x86911786, 0xc15899c1, 0x1d273a1d, 0x9eb9279e, 0xe138d9e1, 0xf813ebf8, 0x98b32b98, 0x11332211, 0x69bbd269, 0xd970a9d9, 0x8e89078e, 0x94a73394, 0x9bb62d9b, 0x1e223c1e, 0x87921587, 0xe920c9e9, 0xce4987ce, 0x55ffaa55, 0x28785028, 0xdf7aa5df, 0x8c8f038c, 0xa1f859a1, 0x89800989, 0x0d171a0d, 0xbfda65bf, 0xe631d7e6, 0x42c68442, 0x68b8d068, 0x41c38241, 0x99b02999, 0x2d775a2d, 0x0f111e0f, 0xb0cb7bb0, 0x54fca854, 0xbbd66dbb, 0x163a2c16];
-	    var T4 = [0x6363a5c6, 0x7c7c84f8, 0x777799ee, 0x7b7b8df6, 0xf2f20dff, 0x6b6bbdd6, 0x6f6fb1de, 0xc5c55491, 0x30305060, 0x01010302, 0x6767a9ce, 0x2b2b7d56, 0xfefe19e7, 0xd7d762b5, 0xababe64d, 0x76769aec, 0xcaca458f, 0x82829d1f, 0xc9c94089, 0x7d7d87fa, 0xfafa15ef, 0x5959ebb2, 0x4747c98e, 0xf0f00bfb, 0xadadec41, 0xd4d467b3, 0xa2a2fd5f, 0xafafea45, 0x9c9cbf23, 0xa4a4f753, 0x727296e4, 0xc0c05b9b, 0xb7b7c275, 0xfdfd1ce1, 0x9393ae3d, 0x26266a4c, 0x36365a6c, 0x3f3f417e, 0xf7f702f5, 0xcccc4f83, 0x34345c68, 0xa5a5f451, 0xe5e534d1, 0xf1f108f9, 0x717193e2, 0xd8d873ab, 0x31315362, 0x15153f2a, 0x04040c08, 0xc7c75295, 0x23236546, 0xc3c35e9d, 0x18182830, 0x9696a137, 0x05050f0a, 0x9a9ab52f, 0x0707090e, 0x12123624, 0x80809b1b, 0xe2e23ddf, 0xebeb26cd, 0x2727694e, 0xb2b2cd7f, 0x75759fea, 0x09091b12, 0x83839e1d, 0x2c2c7458, 0x1a1a2e34, 0x1b1b2d36, 0x6e6eb2dc, 0x5a5aeeb4, 0xa0a0fb5b, 0x5252f6a4, 0x3b3b4d76, 0xd6d661b7, 0xb3b3ce7d, 0x29297b52, 0xe3e33edd, 0x2f2f715e, 0x84849713, 0x5353f5a6, 0xd1d168b9, 0x00000000, 0xeded2cc1, 0x20206040, 0xfcfc1fe3, 0xb1b1c879, 0x5b5bedb6, 0x6a6abed4, 0xcbcb468d, 0xbebed967, 0x39394b72, 0x4a4ade94, 0x4c4cd498, 0x5858e8b0, 0xcfcf4a85, 0xd0d06bbb, 0xefef2ac5, 0xaaaae54f, 0xfbfb16ed, 0x4343c586, 0x4d4dd79a, 0x33335566, 0x85859411, 0x4545cf8a, 0xf9f910e9, 0x02020604, 0x7f7f81fe, 0x5050f0a0, 0x3c3c4478, 0x9f9fba25, 0xa8a8e34b, 0x5151f3a2, 0xa3a3fe5d, 0x4040c080, 0x8f8f8a05, 0x9292ad3f, 0x9d9dbc21, 0x38384870, 0xf5f504f1, 0xbcbcdf63, 0xb6b6c177, 0xdada75af, 0x21216342, 0x10103020, 0xffff1ae5, 0xf3f30efd, 0xd2d26dbf, 0xcdcd4c81, 0x0c0c1418, 0x13133526, 0xecec2fc3, 0x5f5fe1be, 0x9797a235, 0x4444cc88, 0x1717392e, 0xc4c45793, 0xa7a7f255, 0x7e7e82fc, 0x3d3d477a, 0x6464acc8, 0x5d5de7ba, 0x19192b32, 0x737395e6, 0x6060a0c0, 0x81819819, 0x4f4fd19e, 0xdcdc7fa3, 0x22226644, 0x2a2a7e54, 0x9090ab3b, 0x8888830b, 0x4646ca8c, 0xeeee29c7, 0xb8b8d36b, 0x14143c28, 0xdede79a7, 0x5e5ee2bc, 0x0b0b1d16, 0xdbdb76ad, 0xe0e03bdb, 0x32325664, 0x3a3a4e74, 0x0a0a1e14, 0x4949db92, 0x06060a0c, 0x24246c48, 0x5c5ce4b8, 0xc2c25d9f, 0xd3d36ebd, 0xacacef43, 0x6262a6c4, 0x9191a839, 0x9595a431, 0xe4e437d3, 0x79798bf2, 0xe7e732d5, 0xc8c8438b, 0x3737596e, 0x6d6db7da, 0x8d8d8c01, 0xd5d564b1, 0x4e4ed29c, 0xa9a9e049, 0x6c6cb4d8, 0x5656faac, 0xf4f407f3, 0xeaea25cf, 0x6565afca, 0x7a7a8ef4, 0xaeaee947, 0x08081810, 0xbabad56f, 0x787888f0, 0x25256f4a, 0x2e2e725c, 0x1c1c2438, 0xa6a6f157, 0xb4b4c773, 0xc6c65197, 0xe8e823cb, 0xdddd7ca1, 0x74749ce8, 0x1f1f213e, 0x4b4bdd96, 0xbdbddc61, 0x8b8b860d, 0x8a8a850f, 0x707090e0, 0x3e3e427c, 0xb5b5c471, 0x6666aacc, 0x4848d890, 0x03030506, 0xf6f601f7, 0x0e0e121c, 0x6161a3c2, 0x35355f6a, 0x5757f9ae, 0xb9b9d069, 0x86869117, 0xc1c15899, 0x1d1d273a, 0x9e9eb927, 0xe1e138d9, 0xf8f813eb, 0x9898b32b, 0x11113322, 0x6969bbd2, 0xd9d970a9, 0x8e8e8907, 0x9494a733, 0x9b9bb62d, 0x1e1e223c, 0x87879215, 0xe9e920c9, 0xcece4987, 0x5555ffaa, 0x28287850, 0xdfdf7aa5, 0x8c8c8f03, 0xa1a1f859, 0x89898009, 0x0d0d171a, 0xbfbfda65, 0xe6e631d7, 0x4242c684, 0x6868b8d0, 0x4141c382, 0x9999b029, 0x2d2d775a, 0x0f0f111e, 0xb0b0cb7b, 0x5454fca8, 0xbbbbd66d, 0x16163a2c];
-
-	    // Transformations for decryption
-	    var T5 = [0x51f4a750, 0x7e416553, 0x1a17a4c3, 0x3a275e96, 0x3bab6bcb, 0x1f9d45f1, 0xacfa58ab, 0x4be30393, 0x2030fa55, 0xad766df6, 0x88cc7691, 0xf5024c25, 0x4fe5d7fc, 0xc52acbd7, 0x26354480, 0xb562a38f, 0xdeb15a49, 0x25ba1b67, 0x45ea0e98, 0x5dfec0e1, 0xc32f7502, 0x814cf012, 0x8d4697a3, 0x6bd3f9c6, 0x038f5fe7, 0x15929c95, 0xbf6d7aeb, 0x955259da, 0xd4be832d, 0x587421d3, 0x49e06929, 0x8ec9c844, 0x75c2896a, 0xf48e7978, 0x99583e6b, 0x27b971dd, 0xbee14fb6, 0xf088ad17, 0xc920ac66, 0x7dce3ab4, 0x63df4a18, 0xe51a3182, 0x97513360, 0x62537f45, 0xb16477e0, 0xbb6bae84, 0xfe81a01c, 0xf9082b94, 0x70486858, 0x8f45fd19, 0x94de6c87, 0x527bf8b7, 0xab73d323, 0x724b02e2, 0xe31f8f57, 0x6655ab2a, 0xb2eb2807, 0x2fb5c203, 0x86c57b9a, 0xd33708a5, 0x302887f2, 0x23bfa5b2, 0x02036aba, 0xed16825c, 0x8acf1c2b, 0xa779b492, 0xf307f2f0, 0x4e69e2a1, 0x65daf4cd, 0x0605bed5, 0xd134621f, 0xc4a6fe8a, 0x342e539d, 0xa2f355a0, 0x058ae132, 0xa4f6eb75, 0x0b83ec39, 0x4060efaa, 0x5e719f06, 0xbd6e1051, 0x3e218af9, 0x96dd063d, 0xdd3e05ae, 0x4de6bd46, 0x91548db5, 0x71c45d05, 0x0406d46f, 0x605015ff, 0x1998fb24, 0xd6bde997, 0x894043cc, 0x67d99e77, 0xb0e842bd, 0x07898b88, 0xe7195b38, 0x79c8eedb, 0xa17c0a47, 0x7c420fe9, 0xf8841ec9, 0x00000000, 0x09808683, 0x322bed48, 0x1e1170ac, 0x6c5a724e, 0xfd0efffb, 0x0f853856, 0x3daed51e, 0x362d3927, 0x0a0fd964, 0x685ca621, 0x9b5b54d1, 0x24362e3a, 0x0c0a67b1, 0x9357e70f, 0xb4ee96d2, 0x1b9b919e, 0x80c0c54f, 0x61dc20a2, 0x5a774b69, 0x1c121a16, 0xe293ba0a, 0xc0a02ae5, 0x3c22e043, 0x121b171d, 0x0e090d0b, 0xf28bc7ad, 0x2db6a8b9, 0x141ea9c8, 0x57f11985, 0xaf75074c, 0xee99ddbb, 0xa37f60fd, 0xf701269f, 0x5c72f5bc, 0x44663bc5, 0x5bfb7e34, 0x8b432976, 0xcb23c6dc, 0xb6edfc68, 0xb8e4f163, 0xd731dcca, 0x42638510, 0x13972240, 0x84c61120, 0x854a247d, 0xd2bb3df8, 0xaef93211, 0xc729a16d, 0x1d9e2f4b, 0xdcb230f3, 0x0d8652ec, 0x77c1e3d0, 0x2bb3166c, 0xa970b999, 0x119448fa, 0x47e96422, 0xa8fc8cc4, 0xa0f03f1a, 0x567d2cd8, 0x223390ef, 0x87494ec7, 0xd938d1c1, 0x8ccaa2fe, 0x98d40b36, 0xa6f581cf, 0xa57ade28, 0xdab78e26, 0x3fadbfa4, 0x2c3a9de4, 0x5078920d, 0x6a5fcc9b, 0x547e4662, 0xf68d13c2, 0x90d8b8e8, 0x2e39f75e, 0x82c3aff5, 0x9f5d80be, 0x69d0937c, 0x6fd52da9, 0xcf2512b3, 0xc8ac993b, 0x10187da7, 0xe89c636e, 0xdb3bbb7b, 0xcd267809, 0x6e5918f4, 0xec9ab701, 0x834f9aa8, 0xe6956e65, 0xaaffe67e, 0x21bccf08, 0xef15e8e6, 0xbae79bd9, 0x4a6f36ce, 0xea9f09d4, 0x29b07cd6, 0x31a4b2af, 0x2a3f2331, 0xc6a59430, 0x35a266c0, 0x744ebc37, 0xfc82caa6, 0xe090d0b0, 0x33a7d815, 0xf104984a, 0x41ecdaf7, 0x7fcd500e, 0x1791f62f, 0x764dd68d, 0x43efb04d, 0xccaa4d54, 0xe49604df, 0x9ed1b5e3, 0x4c6a881b, 0xc12c1fb8, 0x4665517f, 0x9d5eea04, 0x018c355d, 0xfa877473, 0xfb0b412e, 0xb3671d5a, 0x92dbd252, 0xe9105633, 0x6dd64713, 0x9ad7618c, 0x37a10c7a, 0x59f8148e, 0xeb133c89, 0xcea927ee, 0xb761c935, 0xe11ce5ed, 0x7a47b13c, 0x9cd2df59, 0x55f2733f, 0x1814ce79, 0x73c737bf, 0x53f7cdea, 0x5ffdaa5b, 0xdf3d6f14, 0x7844db86, 0xcaaff381, 0xb968c43e, 0x3824342c, 0xc2a3405f, 0x161dc372, 0xbce2250c, 0x283c498b, 0xff0d9541, 0x39a80171, 0x080cb3de, 0xd8b4e49c, 0x6456c190, 0x7bcb8461, 0xd532b670, 0x486c5c74, 0xd0b85742];
-	    var T6 = [0x5051f4a7, 0x537e4165, 0xc31a17a4, 0x963a275e, 0xcb3bab6b, 0xf11f9d45, 0xabacfa58, 0x934be303, 0x552030fa, 0xf6ad766d, 0x9188cc76, 0x25f5024c, 0xfc4fe5d7, 0xd7c52acb, 0x80263544, 0x8fb562a3, 0x49deb15a, 0x6725ba1b, 0x9845ea0e, 0xe15dfec0, 0x02c32f75, 0x12814cf0, 0xa38d4697, 0xc66bd3f9, 0xe7038f5f, 0x9515929c, 0xebbf6d7a, 0xda955259, 0x2dd4be83, 0xd3587421, 0x2949e069, 0x448ec9c8, 0x6a75c289, 0x78f48e79, 0x6b99583e, 0xdd27b971, 0xb6bee14f, 0x17f088ad, 0x66c920ac, 0xb47dce3a, 0x1863df4a, 0x82e51a31, 0x60975133, 0x4562537f, 0xe0b16477, 0x84bb6bae, 0x1cfe81a0, 0x94f9082b, 0x58704868, 0x198f45fd, 0x8794de6c, 0xb7527bf8, 0x23ab73d3, 0xe2724b02, 0x57e31f8f, 0x2a6655ab, 0x07b2eb28, 0x032fb5c2, 0x9a86c57b, 0xa5d33708, 0xf2302887, 0xb223bfa5, 0xba02036a, 0x5ced1682, 0x2b8acf1c, 0x92a779b4, 0xf0f307f2, 0xa14e69e2, 0xcd65daf4, 0xd50605be, 0x1fd13462, 0x8ac4a6fe, 0x9d342e53, 0xa0a2f355, 0x32058ae1, 0x75a4f6eb, 0x390b83ec, 0xaa4060ef, 0x065e719f, 0x51bd6e10, 0xf93e218a, 0x3d96dd06, 0xaedd3e05, 0x464de6bd, 0xb591548d, 0x0571c45d, 0x6f0406d4, 0xff605015, 0x241998fb, 0x97d6bde9, 0xcc894043, 0x7767d99e, 0xbdb0e842, 0x8807898b, 0x38e7195b, 0xdb79c8ee, 0x47a17c0a, 0xe97c420f, 0xc9f8841e, 0x00000000, 0x83098086, 0x48322bed, 0xac1e1170, 0x4e6c5a72, 0xfbfd0eff, 0x560f8538, 0x1e3daed5, 0x27362d39, 0x640a0fd9, 0x21685ca6, 0xd19b5b54, 0x3a24362e, 0xb10c0a67, 0x0f9357e7, 0xd2b4ee96, 0x9e1b9b91, 0x4f80c0c5, 0xa261dc20, 0x695a774b, 0x161c121a, 0x0ae293ba, 0xe5c0a02a, 0x433c22e0, 0x1d121b17, 0x0b0e090d, 0xadf28bc7, 0xb92db6a8, 0xc8141ea9, 0x8557f119, 0x4caf7507, 0xbbee99dd, 0xfda37f60, 0x9ff70126, 0xbc5c72f5, 0xc544663b, 0x345bfb7e, 0x768b4329, 0xdccb23c6, 0x68b6edfc, 0x63b8e4f1, 0xcad731dc, 0x10426385, 0x40139722, 0x2084c611, 0x7d854a24, 0xf8d2bb3d, 0x11aef932, 0x6dc729a1, 0x4b1d9e2f, 0xf3dcb230, 0xec0d8652, 0xd077c1e3, 0x6c2bb316, 0x99a970b9, 0xfa119448, 0x2247e964, 0xc4a8fc8c, 0x1aa0f03f, 0xd8567d2c, 0xef223390, 0xc787494e, 0xc1d938d1, 0xfe8ccaa2, 0x3698d40b, 0xcfa6f581, 0x28a57ade, 0x26dab78e, 0xa43fadbf, 0xe42c3a9d, 0x0d507892, 0x9b6a5fcc, 0x62547e46, 0xc2f68d13, 0xe890d8b8, 0x5e2e39f7, 0xf582c3af, 0xbe9f5d80, 0x7c69d093, 0xa96fd52d, 0xb3cf2512, 0x3bc8ac99, 0xa710187d, 0x6ee89c63, 0x7bdb3bbb, 0x09cd2678, 0xf46e5918, 0x01ec9ab7, 0xa8834f9a, 0x65e6956e, 0x7eaaffe6, 0x0821bccf, 0xe6ef15e8, 0xd9bae79b, 0xce4a6f36, 0xd4ea9f09, 0xd629b07c, 0xaf31a4b2, 0x312a3f23, 0x30c6a594, 0xc035a266, 0x37744ebc, 0xa6fc82ca, 0xb0e090d0, 0x1533a7d8, 0x4af10498, 0xf741ecda, 0x0e7fcd50, 0x2f1791f6, 0x8d764dd6, 0x4d43efb0, 0x54ccaa4d, 0xdfe49604, 0xe39ed1b5, 0x1b4c6a88, 0xb8c12c1f, 0x7f466551, 0x049d5eea, 0x5d018c35, 0x73fa8774, 0x2efb0b41, 0x5ab3671d, 0x5292dbd2, 0x33e91056, 0x136dd647, 0x8c9ad761, 0x7a37a10c, 0x8e59f814, 0x89eb133c, 0xeecea927, 0x35b761c9, 0xede11ce5, 0x3c7a47b1, 0x599cd2df, 0x3f55f273, 0x791814ce, 0xbf73c737, 0xea53f7cd, 0x5b5ffdaa, 0x14df3d6f, 0x867844db, 0x81caaff3, 0x3eb968c4, 0x2c382434, 0x5fc2a340, 0x72161dc3, 0x0cbce225, 0x8b283c49, 0x41ff0d95, 0x7139a801, 0xde080cb3, 0x9cd8b4e4, 0x906456c1, 0x617bcb84, 0x70d532b6, 0x74486c5c, 0x42d0b857];
-	    var T7 = [0xa75051f4, 0x65537e41, 0xa4c31a17, 0x5e963a27, 0x6bcb3bab, 0x45f11f9d, 0x58abacfa, 0x03934be3, 0xfa552030, 0x6df6ad76, 0x769188cc, 0x4c25f502, 0xd7fc4fe5, 0xcbd7c52a, 0x44802635, 0xa38fb562, 0x5a49deb1, 0x1b6725ba, 0x0e9845ea, 0xc0e15dfe, 0x7502c32f, 0xf012814c, 0x97a38d46, 0xf9c66bd3, 0x5fe7038f, 0x9c951592, 0x7aebbf6d, 0x59da9552, 0x832dd4be, 0x21d35874, 0x692949e0, 0xc8448ec9, 0x896a75c2, 0x7978f48e, 0x3e6b9958, 0x71dd27b9, 0x4fb6bee1, 0xad17f088, 0xac66c920, 0x3ab47dce, 0x4a1863df, 0x3182e51a, 0x33609751, 0x7f456253, 0x77e0b164, 0xae84bb6b, 0xa01cfe81, 0x2b94f908, 0x68587048, 0xfd198f45, 0x6c8794de, 0xf8b7527b, 0xd323ab73, 0x02e2724b, 0x8f57e31f, 0xab2a6655, 0x2807b2eb, 0xc2032fb5, 0x7b9a86c5, 0x08a5d337, 0x87f23028, 0xa5b223bf, 0x6aba0203, 0x825ced16, 0x1c2b8acf, 0xb492a779, 0xf2f0f307, 0xe2a14e69, 0xf4cd65da, 0xbed50605, 0x621fd134, 0xfe8ac4a6, 0x539d342e, 0x55a0a2f3, 0xe132058a, 0xeb75a4f6, 0xec390b83, 0xefaa4060, 0x9f065e71, 0x1051bd6e, 0x8af93e21, 0x063d96dd, 0x05aedd3e, 0xbd464de6, 0x8db59154, 0x5d0571c4, 0xd46f0406, 0x15ff6050, 0xfb241998, 0xe997d6bd, 0x43cc8940, 0x9e7767d9, 0x42bdb0e8, 0x8b880789, 0x5b38e719, 0xeedb79c8, 0x0a47a17c, 0x0fe97c42, 0x1ec9f884, 0x00000000, 0x86830980, 0xed48322b, 0x70ac1e11, 0x724e6c5a, 0xfffbfd0e, 0x38560f85, 0xd51e3dae, 0x3927362d, 0xd9640a0f, 0xa621685c, 0x54d19b5b, 0x2e3a2436, 0x67b10c0a, 0xe70f9357, 0x96d2b4ee, 0x919e1b9b, 0xc54f80c0, 0x20a261dc, 0x4b695a77, 0x1a161c12, 0xba0ae293, 0x2ae5c0a0, 0xe0433c22, 0x171d121b, 0x0d0b0e09, 0xc7adf28b, 0xa8b92db6, 0xa9c8141e, 0x198557f1, 0x074caf75, 0xddbbee99, 0x60fda37f, 0x269ff701, 0xf5bc5c72, 0x3bc54466, 0x7e345bfb, 0x29768b43, 0xc6dccb23, 0xfc68b6ed, 0xf163b8e4, 0xdccad731, 0x85104263, 0x22401397, 0x112084c6, 0x247d854a, 0x3df8d2bb, 0x3211aef9, 0xa16dc729, 0x2f4b1d9e, 0x30f3dcb2, 0x52ec0d86, 0xe3d077c1, 0x166c2bb3, 0xb999a970, 0x48fa1194, 0x642247e9, 0x8cc4a8fc, 0x3f1aa0f0, 0x2cd8567d, 0x90ef2233, 0x4ec78749, 0xd1c1d938, 0xa2fe8cca, 0x0b3698d4, 0x81cfa6f5, 0xde28a57a, 0x8e26dab7, 0xbfa43fad, 0x9de42c3a, 0x920d5078, 0xcc9b6a5f, 0x4662547e, 0x13c2f68d, 0xb8e890d8, 0xf75e2e39, 0xaff582c3, 0x80be9f5d, 0x937c69d0, 0x2da96fd5, 0x12b3cf25, 0x993bc8ac, 0x7da71018, 0x636ee89c, 0xbb7bdb3b, 0x7809cd26, 0x18f46e59, 0xb701ec9a, 0x9aa8834f, 0x6e65e695, 0xe67eaaff, 0xcf0821bc, 0xe8e6ef15, 0x9bd9bae7, 0x36ce4a6f, 0x09d4ea9f, 0x7cd629b0, 0xb2af31a4, 0x23312a3f, 0x9430c6a5, 0x66c035a2, 0xbc37744e, 0xcaa6fc82, 0xd0b0e090, 0xd81533a7, 0x984af104, 0xdaf741ec, 0x500e7fcd, 0xf62f1791, 0xd68d764d, 0xb04d43ef, 0x4d54ccaa, 0x04dfe496, 0xb5e39ed1, 0x881b4c6a, 0x1fb8c12c, 0x517f4665, 0xea049d5e, 0x355d018c, 0x7473fa87, 0x412efb0b, 0x1d5ab367, 0xd25292db, 0x5633e910, 0x47136dd6, 0x618c9ad7, 0x0c7a37a1, 0x148e59f8, 0x3c89eb13, 0x27eecea9, 0xc935b761, 0xe5ede11c, 0xb13c7a47, 0xdf599cd2, 0x733f55f2, 0xce791814, 0x37bf73c7, 0xcdea53f7, 0xaa5b5ffd, 0x6f14df3d, 0xdb867844, 0xf381caaf, 0xc43eb968, 0x342c3824, 0x405fc2a3, 0xc372161d, 0x250cbce2, 0x498b283c, 0x9541ff0d, 0x017139a8, 0xb3de080c, 0xe49cd8b4, 0xc1906456, 0x84617bcb, 0xb670d532, 0x5c74486c, 0x5742d0b8];
-	    var T8 = [0xf4a75051, 0x4165537e, 0x17a4c31a, 0x275e963a, 0xab6bcb3b, 0x9d45f11f, 0xfa58abac, 0xe303934b, 0x30fa5520, 0x766df6ad, 0xcc769188, 0x024c25f5, 0xe5d7fc4f, 0x2acbd7c5, 0x35448026, 0x62a38fb5, 0xb15a49de, 0xba1b6725, 0xea0e9845, 0xfec0e15d, 0x2f7502c3, 0x4cf01281, 0x4697a38d, 0xd3f9c66b, 0x8f5fe703, 0x929c9515, 0x6d7aebbf, 0x5259da95, 0xbe832dd4, 0x7421d358, 0xe0692949, 0xc9c8448e, 0xc2896a75, 0x8e7978f4, 0x583e6b99, 0xb971dd27, 0xe14fb6be, 0x88ad17f0, 0x20ac66c9, 0xce3ab47d, 0xdf4a1863, 0x1a3182e5, 0x51336097, 0x537f4562, 0x6477e0b1, 0x6bae84bb, 0x81a01cfe, 0x082b94f9, 0x48685870, 0x45fd198f, 0xde6c8794, 0x7bf8b752, 0x73d323ab, 0x4b02e272, 0x1f8f57e3, 0x55ab2a66, 0xeb2807b2, 0xb5c2032f, 0xc57b9a86, 0x3708a5d3, 0x2887f230, 0xbfa5b223, 0x036aba02, 0x16825ced, 0xcf1c2b8a, 0x79b492a7, 0x07f2f0f3, 0x69e2a14e, 0xdaf4cd65, 0x05bed506, 0x34621fd1, 0xa6fe8ac4, 0x2e539d34, 0xf355a0a2, 0x8ae13205, 0xf6eb75a4, 0x83ec390b, 0x60efaa40, 0x719f065e, 0x6e1051bd, 0x218af93e, 0xdd063d96, 0x3e05aedd, 0xe6bd464d, 0x548db591, 0xc45d0571, 0x06d46f04, 0x5015ff60, 0x98fb2419, 0xbde997d6, 0x4043cc89, 0xd99e7767, 0xe842bdb0, 0x898b8807, 0x195b38e7, 0xc8eedb79, 0x7c0a47a1, 0x420fe97c, 0x841ec9f8, 0x00000000, 0x80868309, 0x2bed4832, 0x1170ac1e, 0x5a724e6c, 0x0efffbfd, 0x8538560f, 0xaed51e3d, 0x2d392736, 0x0fd9640a, 0x5ca62168, 0x5b54d19b, 0x362e3a24, 0x0a67b10c, 0x57e70f93, 0xee96d2b4, 0x9b919e1b, 0xc0c54f80, 0xdc20a261, 0x774b695a, 0x121a161c, 0x93ba0ae2, 0xa02ae5c0, 0x22e0433c, 0x1b171d12, 0x090d0b0e, 0x8bc7adf2, 0xb6a8b92d, 0x1ea9c814, 0xf1198557, 0x75074caf, 0x99ddbbee, 0x7f60fda3, 0x01269ff7, 0x72f5bc5c, 0x663bc544, 0xfb7e345b, 0x4329768b, 0x23c6dccb, 0xedfc68b6, 0xe4f163b8, 0x31dccad7, 0x63851042, 0x97224013, 0xc6112084, 0x4a247d85, 0xbb3df8d2, 0xf93211ae, 0x29a16dc7, 0x9e2f4b1d, 0xb230f3dc, 0x8652ec0d, 0xc1e3d077, 0xb3166c2b, 0x70b999a9, 0x9448fa11, 0xe9642247, 0xfc8cc4a8, 0xf03f1aa0, 0x7d2cd856, 0x3390ef22, 0x494ec787, 0x38d1c1d9, 0xcaa2fe8c, 0xd40b3698, 0xf581cfa6, 0x7ade28a5, 0xb78e26da, 0xadbfa43f, 0x3a9de42c, 0x78920d50, 0x5fcc9b6a, 0x7e466254, 0x8d13c2f6, 0xd8b8e890, 0x39f75e2e, 0xc3aff582, 0x5d80be9f, 0xd0937c69, 0xd52da96f, 0x2512b3cf, 0xac993bc8, 0x187da710, 0x9c636ee8, 0x3bbb7bdb, 0x267809cd, 0x5918f46e, 0x9ab701ec, 0x4f9aa883, 0x956e65e6, 0xffe67eaa, 0xbccf0821, 0x15e8e6ef, 0xe79bd9ba, 0x6f36ce4a, 0x9f09d4ea, 0xb07cd629, 0xa4b2af31, 0x3f23312a, 0xa59430c6, 0xa266c035, 0x4ebc3774, 0x82caa6fc, 0x90d0b0e0, 0xa7d81533, 0x04984af1, 0xecdaf741, 0xcd500e7f, 0x91f62f17, 0x4dd68d76, 0xefb04d43, 0xaa4d54cc, 0x9604dfe4, 0xd1b5e39e, 0x6a881b4c, 0x2c1fb8c1, 0x65517f46, 0x5eea049d, 0x8c355d01, 0x877473fa, 0x0b412efb, 0x671d5ab3, 0xdbd25292, 0x105633e9, 0xd647136d, 0xd7618c9a, 0xa10c7a37, 0xf8148e59, 0x133c89eb, 0xa927eece, 0x61c935b7, 0x1ce5ede1, 0x47b13c7a, 0xd2df599c, 0xf2733f55, 0x14ce7918, 0xc737bf73, 0xf7cdea53, 0xfdaa5b5f, 0x3d6f14df, 0x44db8678, 0xaff381ca, 0x68c43eb9, 0x24342c38, 0xa3405fc2, 0x1dc37216, 0xe2250cbc, 0x3c498b28, 0x0d9541ff, 0xa8017139, 0x0cb3de08, 0xb4e49cd8, 0x56c19064, 0xcb84617b, 0x32b670d5, 0x6c5c7448, 0xb85742d0];
-
-	    // Transformations for decryption key expansion
-	    var U1 = [0x00000000, 0x0e090d0b, 0x1c121a16, 0x121b171d, 0x3824342c, 0x362d3927, 0x24362e3a, 0x2a3f2331, 0x70486858, 0x7e416553, 0x6c5a724e, 0x62537f45, 0x486c5c74, 0x4665517f, 0x547e4662, 0x5a774b69, 0xe090d0b0, 0xee99ddbb, 0xfc82caa6, 0xf28bc7ad, 0xd8b4e49c, 0xd6bde997, 0xc4a6fe8a, 0xcaaff381, 0x90d8b8e8, 0x9ed1b5e3, 0x8ccaa2fe, 0x82c3aff5, 0xa8fc8cc4, 0xa6f581cf, 0xb4ee96d2, 0xbae79bd9, 0xdb3bbb7b, 0xd532b670, 0xc729a16d, 0xc920ac66, 0xe31f8f57, 0xed16825c, 0xff0d9541, 0xf104984a, 0xab73d323, 0xa57ade28, 0xb761c935, 0xb968c43e, 0x9357e70f, 0x9d5eea04, 0x8f45fd19, 0x814cf012, 0x3bab6bcb, 0x35a266c0, 0x27b971dd, 0x29b07cd6, 0x038f5fe7, 0x0d8652ec, 0x1f9d45f1, 0x119448fa, 0x4be30393, 0x45ea0e98, 0x57f11985, 0x59f8148e, 0x73c737bf, 0x7dce3ab4, 0x6fd52da9, 0x61dc20a2, 0xad766df6, 0xa37f60fd, 0xb16477e0, 0xbf6d7aeb, 0x955259da, 0x9b5b54d1, 0x894043cc, 0x87494ec7, 0xdd3e05ae, 0xd33708a5, 0xc12c1fb8, 0xcf2512b3, 0xe51a3182, 0xeb133c89, 0xf9082b94, 0xf701269f, 0x4de6bd46, 0x43efb04d, 0x51f4a750, 0x5ffdaa5b, 0x75c2896a, 0x7bcb8461, 0x69d0937c, 0x67d99e77, 0x3daed51e, 0x33a7d815, 0x21bccf08, 0x2fb5c203, 0x058ae132, 0x0b83ec39, 0x1998fb24, 0x1791f62f, 0x764dd68d, 0x7844db86, 0x6a5fcc9b, 0x6456c190, 0x4e69e2a1, 0x4060efaa, 0x527bf8b7, 0x5c72f5bc, 0x0605bed5, 0x080cb3de, 0x1a17a4c3, 0x141ea9c8, 0x3e218af9, 0x302887f2, 0x223390ef, 0x2c3a9de4, 0x96dd063d, 0x98d40b36, 0x8acf1c2b, 0x84c61120, 0xaef93211, 0xa0f03f1a, 0xb2eb2807, 0xbce2250c, 0xe6956e65, 0xe89c636e, 0xfa877473, 0xf48e7978, 0xdeb15a49, 0xd0b85742, 0xc2a3405f, 0xccaa4d54, 0x41ecdaf7, 0x4fe5d7fc, 0x5dfec0e1, 0x53f7cdea, 0x79c8eedb, 0x77c1e3d0, 0x65daf4cd, 0x6bd3f9c6, 0x31a4b2af, 0x3fadbfa4, 0x2db6a8b9, 0x23bfa5b2, 0x09808683, 0x07898b88, 0x15929c95, 0x1b9b919e, 0xa17c0a47, 0xaf75074c, 0xbd6e1051, 0xb3671d5a, 0x99583e6b, 0x97513360, 0x854a247d, 0x8b432976, 0xd134621f, 0xdf3d6f14, 0xcd267809, 0xc32f7502, 0xe9105633, 0xe7195b38, 0xf5024c25, 0xfb0b412e, 0x9ad7618c, 0x94de6c87, 0x86c57b9a, 0x88cc7691, 0xa2f355a0, 0xacfa58ab, 0xbee14fb6, 0xb0e842bd, 0xea9f09d4, 0xe49604df, 0xf68d13c2, 0xf8841ec9, 0xd2bb3df8, 0xdcb230f3, 0xcea927ee, 0xc0a02ae5, 0x7a47b13c, 0x744ebc37, 0x6655ab2a, 0x685ca621, 0x42638510, 0x4c6a881b, 0x5e719f06, 0x5078920d, 0x0a0fd964, 0x0406d46f, 0x161dc372, 0x1814ce79, 0x322bed48, 0x3c22e043, 0x2e39f75e, 0x2030fa55, 0xec9ab701, 0xe293ba0a, 0xf088ad17, 0xfe81a01c, 0xd4be832d, 0xdab78e26, 0xc8ac993b, 0xc6a59430, 0x9cd2df59, 0x92dbd252, 0x80c0c54f, 0x8ec9c844, 0xa4f6eb75, 0xaaffe67e, 0xb8e4f163, 0xb6edfc68, 0x0c0a67b1, 0x02036aba, 0x10187da7, 0x1e1170ac, 0x342e539d, 0x3a275e96, 0x283c498b, 0x26354480, 0x7c420fe9, 0x724b02e2, 0x605015ff, 0x6e5918f4, 0x44663bc5, 0x4a6f36ce, 0x587421d3, 0x567d2cd8, 0x37a10c7a, 0x39a80171, 0x2bb3166c, 0x25ba1b67, 0x0f853856, 0x018c355d, 0x13972240, 0x1d9e2f4b, 0x47e96422, 0x49e06929, 0x5bfb7e34, 0x55f2733f, 0x7fcd500e, 0x71c45d05, 0x63df4a18, 0x6dd64713, 0xd731dcca, 0xd938d1c1, 0xcb23c6dc, 0xc52acbd7, 0xef15e8e6, 0xe11ce5ed, 0xf307f2f0, 0xfd0efffb, 0xa779b492, 0xa970b999, 0xbb6bae84, 0xb562a38f, 0x9f5d80be, 0x91548db5, 0x834f9aa8, 0x8d4697a3];
-	    var U2 = [0x00000000, 0x0b0e090d, 0x161c121a, 0x1d121b17, 0x2c382434, 0x27362d39, 0x3a24362e, 0x312a3f23, 0x58704868, 0x537e4165, 0x4e6c5a72, 0x4562537f, 0x74486c5c, 0x7f466551, 0x62547e46, 0x695a774b, 0xb0e090d0, 0xbbee99dd, 0xa6fc82ca, 0xadf28bc7, 0x9cd8b4e4, 0x97d6bde9, 0x8ac4a6fe, 0x81caaff3, 0xe890d8b8, 0xe39ed1b5, 0xfe8ccaa2, 0xf582c3af, 0xc4a8fc8c, 0xcfa6f581, 0xd2b4ee96, 0xd9bae79b, 0x7bdb3bbb, 0x70d532b6, 0x6dc729a1, 0x66c920ac, 0x57e31f8f, 0x5ced1682, 0x41ff0d95, 0x4af10498, 0x23ab73d3, 0x28a57ade, 0x35b761c9, 0x3eb968c4, 0x0f9357e7, 0x049d5eea, 0x198f45fd, 0x12814cf0, 0xcb3bab6b, 0xc035a266, 0xdd27b971, 0xd629b07c, 0xe7038f5f, 0xec0d8652, 0xf11f9d45, 0xfa119448, 0x934be303, 0x9845ea0e, 0x8557f119, 0x8e59f814, 0xbf73c737, 0xb47dce3a, 0xa96fd52d, 0xa261dc20, 0xf6ad766d, 0xfda37f60, 0xe0b16477, 0xebbf6d7a, 0xda955259, 0xd19b5b54, 0xcc894043, 0xc787494e, 0xaedd3e05, 0xa5d33708, 0xb8c12c1f, 0xb3cf2512, 0x82e51a31, 0x89eb133c, 0x94f9082b, 0x9ff70126, 0x464de6bd, 0x4d43efb0, 0x5051f4a7, 0x5b5ffdaa, 0x6a75c289, 0x617bcb84, 0x7c69d093, 0x7767d99e, 0x1e3daed5, 0x1533a7d8, 0x0821bccf, 0x032fb5c2, 0x32058ae1, 0x390b83ec, 0x241998fb, 0x2f1791f6, 0x8d764dd6, 0x867844db, 0x9b6a5fcc, 0x906456c1, 0xa14e69e2, 0xaa4060ef, 0xb7527bf8, 0xbc5c72f5, 0xd50605be, 0xde080cb3, 0xc31a17a4, 0xc8141ea9, 0xf93e218a, 0xf2302887, 0xef223390, 0xe42c3a9d, 0x3d96dd06, 0x3698d40b, 0x2b8acf1c, 0x2084c611, 0x11aef932, 0x1aa0f03f, 0x07b2eb28, 0x0cbce225, 0x65e6956e, 0x6ee89c63, 0x73fa8774, 0x78f48e79, 0x49deb15a, 0x42d0b857, 0x5fc2a340, 0x54ccaa4d, 0xf741ecda, 0xfc4fe5d7, 0xe15dfec0, 0xea53f7cd, 0xdb79c8ee, 0xd077c1e3, 0xcd65daf4, 0xc66bd3f9, 0xaf31a4b2, 0xa43fadbf, 0xb92db6a8, 0xb223bfa5, 0x83098086, 0x8807898b, 0x9515929c, 0x9e1b9b91, 0x47a17c0a, 0x4caf7507, 0x51bd6e10, 0x5ab3671d, 0x6b99583e, 0x60975133, 0x7d854a24, 0x768b4329, 0x1fd13462, 0x14df3d6f, 0x09cd2678, 0x02c32f75, 0x33e91056, 0x38e7195b, 0x25f5024c, 0x2efb0b41, 0x8c9ad761, 0x8794de6c, 0x9a86c57b, 0x9188cc76, 0xa0a2f355, 0xabacfa58, 0xb6bee14f, 0xbdb0e842, 0xd4ea9f09, 0xdfe49604, 0xc2f68d13, 0xc9f8841e, 0xf8d2bb3d, 0xf3dcb230, 0xeecea927, 0xe5c0a02a, 0x3c7a47b1, 0x37744ebc, 0x2a6655ab, 0x21685ca6, 0x10426385, 0x1b4c6a88, 0x065e719f, 0x0d507892, 0x640a0fd9, 0x6f0406d4, 0x72161dc3, 0x791814ce, 0x48322bed, 0x433c22e0, 0x5e2e39f7, 0x552030fa, 0x01ec9ab7, 0x0ae293ba, 0x17f088ad, 0x1cfe81a0, 0x2dd4be83, 0x26dab78e, 0x3bc8ac99, 0x30c6a594, 0x599cd2df, 0x5292dbd2, 0x4f80c0c5, 0x448ec9c8, 0x75a4f6eb, 0x7eaaffe6, 0x63b8e4f1, 0x68b6edfc, 0xb10c0a67, 0xba02036a, 0xa710187d, 0xac1e1170, 0x9d342e53, 0x963a275e, 0x8b283c49, 0x80263544, 0xe97c420f, 0xe2724b02, 0xff605015, 0xf46e5918, 0xc544663b, 0xce4a6f36, 0xd3587421, 0xd8567d2c, 0x7a37a10c, 0x7139a801, 0x6c2bb316, 0x6725ba1b, 0x560f8538, 0x5d018c35, 0x40139722, 0x4b1d9e2f, 0x2247e964, 0x2949e069, 0x345bfb7e, 0x3f55f273, 0x0e7fcd50, 0x0571c45d, 0x1863df4a, 0x136dd647, 0xcad731dc, 0xc1d938d1, 0xdccb23c6, 0xd7c52acb, 0xe6ef15e8, 0xede11ce5, 0xf0f307f2, 0xfbfd0eff, 0x92a779b4, 0x99a970b9, 0x84bb6bae, 0x8fb562a3, 0xbe9f5d80, 0xb591548d, 0xa8834f9a, 0xa38d4697];
-	    var U3 = [0x00000000, 0x0d0b0e09, 0x1a161c12, 0x171d121b, 0x342c3824, 0x3927362d, 0x2e3a2436, 0x23312a3f, 0x68587048, 0x65537e41, 0x724e6c5a, 0x7f456253, 0x5c74486c, 0x517f4665, 0x4662547e, 0x4b695a77, 0xd0b0e090, 0xddbbee99, 0xcaa6fc82, 0xc7adf28b, 0xe49cd8b4, 0xe997d6bd, 0xfe8ac4a6, 0xf381caaf, 0xb8e890d8, 0xb5e39ed1, 0xa2fe8cca, 0xaff582c3, 0x8cc4a8fc, 0x81cfa6f5, 0x96d2b4ee, 0x9bd9bae7, 0xbb7bdb3b, 0xb670d532, 0xa16dc729, 0xac66c920, 0x8f57e31f, 0x825ced16, 0x9541ff0d, 0x984af104, 0xd323ab73, 0xde28a57a, 0xc935b761, 0xc43eb968, 0xe70f9357, 0xea049d5e, 0xfd198f45, 0xf012814c, 0x6bcb3bab, 0x66c035a2, 0x71dd27b9, 0x7cd629b0, 0x5fe7038f, 0x52ec0d86, 0x45f11f9d, 0x48fa1194, 0x03934be3, 0x0e9845ea, 0x198557f1, 0x148e59f8, 0x37bf73c7, 0x3ab47dce, 0x2da96fd5, 0x20a261dc, 0x6df6ad76, 0x60fda37f, 0x77e0b164, 0x7aebbf6d, 0x59da9552, 0x54d19b5b, 0x43cc8940, 0x4ec78749, 0x05aedd3e, 0x08a5d337, 0x1fb8c12c, 0x12b3cf25, 0x3182e51a, 0x3c89eb13, 0x2b94f908, 0x269ff701, 0xbd464de6, 0xb04d43ef, 0xa75051f4, 0xaa5b5ffd, 0x896a75c2, 0x84617bcb, 0x937c69d0, 0x9e7767d9, 0xd51e3dae, 0xd81533a7, 0xcf0821bc, 0xc2032fb5, 0xe132058a, 0xec390b83, 0xfb241998, 0xf62f1791, 0xd68d764d, 0xdb867844, 0xcc9b6a5f, 0xc1906456, 0xe2a14e69, 0xefaa4060, 0xf8b7527b, 0xf5bc5c72, 0xbed50605, 0xb3de080c, 0xa4c31a17, 0xa9c8141e, 0x8af93e21, 0x87f23028, 0x90ef2233, 0x9de42c3a, 0x063d96dd, 0x0b3698d4, 0x1c2b8acf, 0x112084c6, 0x3211aef9, 0x3f1aa0f0, 0x2807b2eb, 0x250cbce2, 0x6e65e695, 0x636ee89c, 0x7473fa87, 0x7978f48e, 0x5a49deb1, 0x5742d0b8, 0x405fc2a3, 0x4d54ccaa, 0xdaf741ec, 0xd7fc4fe5, 0xc0e15dfe, 0xcdea53f7, 0xeedb79c8, 0xe3d077c1, 0xf4cd65da, 0xf9c66bd3, 0xb2af31a4, 0xbfa43fad, 0xa8b92db6, 0xa5b223bf, 0x86830980, 0x8b880789, 0x9c951592, 0x919e1b9b, 0x0a47a17c, 0x074caf75, 0x1051bd6e, 0x1d5ab367, 0x3e6b9958, 0x33609751, 0x247d854a, 0x29768b43, 0x621fd134, 0x6f14df3d, 0x7809cd26, 0x7502c32f, 0x5633e910, 0x5b38e719, 0x4c25f502, 0x412efb0b, 0x618c9ad7, 0x6c8794de, 0x7b9a86c5, 0x769188cc, 0x55a0a2f3, 0x58abacfa, 0x4fb6bee1, 0x42bdb0e8, 0x09d4ea9f, 0x04dfe496, 0x13c2f68d, 0x1ec9f884, 0x3df8d2bb, 0x30f3dcb2, 0x27eecea9, 0x2ae5c0a0, 0xb13c7a47, 0xbc37744e, 0xab2a6655, 0xa621685c, 0x85104263, 0x881b4c6a, 0x9f065e71, 0x920d5078, 0xd9640a0f, 0xd46f0406, 0xc372161d, 0xce791814, 0xed48322b, 0xe0433c22, 0xf75e2e39, 0xfa552030, 0xb701ec9a, 0xba0ae293, 0xad17f088, 0xa01cfe81, 0x832dd4be, 0x8e26dab7, 0x993bc8ac, 0x9430c6a5, 0xdf599cd2, 0xd25292db, 0xc54f80c0, 0xc8448ec9, 0xeb75a4f6, 0xe67eaaff, 0xf163b8e4, 0xfc68b6ed, 0x67b10c0a, 0x6aba0203, 0x7da71018, 0x70ac1e11, 0x539d342e, 0x5e963a27, 0x498b283c, 0x44802635, 0x0fe97c42, 0x02e2724b, 0x15ff6050, 0x18f46e59, 0x3bc54466, 0x36ce4a6f, 0x21d35874, 0x2cd8567d, 0x0c7a37a1, 0x017139a8, 0x166c2bb3, 0x1b6725ba, 0x38560f85, 0x355d018c, 0x22401397, 0x2f4b1d9e, 0x642247e9, 0x692949e0, 0x7e345bfb, 0x733f55f2, 0x500e7fcd, 0x5d0571c4, 0x4a1863df, 0x47136dd6, 0xdccad731, 0xd1c1d938, 0xc6dccb23, 0xcbd7c52a, 0xe8e6ef15, 0xe5ede11c, 0xf2f0f307, 0xfffbfd0e, 0xb492a779, 0xb999a970, 0xae84bb6b, 0xa38fb562, 0x80be9f5d, 0x8db59154, 0x9aa8834f, 0x97a38d46];
-	    var U4 = [0x00000000, 0x090d0b0e, 0x121a161c, 0x1b171d12, 0x24342c38, 0x2d392736, 0x362e3a24, 0x3f23312a, 0x48685870, 0x4165537e, 0x5a724e6c, 0x537f4562, 0x6c5c7448, 0x65517f46, 0x7e466254, 0x774b695a, 0x90d0b0e0, 0x99ddbbee, 0x82caa6fc, 0x8bc7adf2, 0xb4e49cd8, 0xbde997d6, 0xa6fe8ac4, 0xaff381ca, 0xd8b8e890, 0xd1b5e39e, 0xcaa2fe8c, 0xc3aff582, 0xfc8cc4a8, 0xf581cfa6, 0xee96d2b4, 0xe79bd9ba, 0x3bbb7bdb, 0x32b670d5, 0x29a16dc7, 0x20ac66c9, 0x1f8f57e3, 0x16825ced, 0x0d9541ff, 0x04984af1, 0x73d323ab, 0x7ade28a5, 0x61c935b7, 0x68c43eb9, 0x57e70f93, 0x5eea049d, 0x45fd198f, 0x4cf01281, 0xab6bcb3b, 0xa266c035, 0xb971dd27, 0xb07cd629, 0x8f5fe703, 0x8652ec0d, 0x9d45f11f, 0x9448fa11, 0xe303934b, 0xea0e9845, 0xf1198557, 0xf8148e59, 0xc737bf73, 0xce3ab47d, 0xd52da96f, 0xdc20a261, 0x766df6ad, 0x7f60fda3, 0x6477e0b1, 0x6d7aebbf, 0x5259da95, 0x5b54d19b, 0x4043cc89, 0x494ec787, 0x3e05aedd, 0x3708a5d3, 0x2c1fb8c1, 0x2512b3cf, 0x1a3182e5, 0x133c89eb, 0x082b94f9, 0x01269ff7, 0xe6bd464d, 0xefb04d43, 0xf4a75051, 0xfdaa5b5f, 0xc2896a75, 0xcb84617b, 0xd0937c69, 0xd99e7767, 0xaed51e3d, 0xa7d81533, 0xbccf0821, 0xb5c2032f, 0x8ae13205, 0x83ec390b, 0x98fb2419, 0x91f62f17, 0x4dd68d76, 0x44db8678, 0x5fcc9b6a, 0x56c19064, 0x69e2a14e, 0x60efaa40, 0x7bf8b752, 0x72f5bc5c, 0x05bed506, 0x0cb3de08, 0x17a4c31a, 0x1ea9c814, 0x218af93e, 0x2887f230, 0x3390ef22, 0x3a9de42c, 0xdd063d96, 0xd40b3698, 0xcf1c2b8a, 0xc6112084, 0xf93211ae, 0xf03f1aa0, 0xeb2807b2, 0xe2250cbc, 0x956e65e6, 0x9c636ee8, 0x877473fa, 0x8e7978f4, 0xb15a49de, 0xb85742d0, 0xa3405fc2, 0xaa4d54cc, 0xecdaf741, 0xe5d7fc4f, 0xfec0e15d, 0xf7cdea53, 0xc8eedb79, 0xc1e3d077, 0xdaf4cd65, 0xd3f9c66b, 0xa4b2af31, 0xadbfa43f, 0xb6a8b92d, 0xbfa5b223, 0x80868309, 0x898b8807, 0x929c9515, 0x9b919e1b, 0x7c0a47a1, 0x75074caf, 0x6e1051bd, 0x671d5ab3, 0x583e6b99, 0x51336097, 0x4a247d85, 0x4329768b, 0x34621fd1, 0x3d6f14df, 0x267809cd, 0x2f7502c3, 0x105633e9, 0x195b38e7, 0x024c25f5, 0x0b412efb, 0xd7618c9a, 0xde6c8794, 0xc57b9a86, 0xcc769188, 0xf355a0a2, 0xfa58abac, 0xe14fb6be, 0xe842bdb0, 0x9f09d4ea, 0x9604dfe4, 0x8d13c2f6, 0x841ec9f8, 0xbb3df8d2, 0xb230f3dc, 0xa927eece, 0xa02ae5c0, 0x47b13c7a, 0x4ebc3774, 0x55ab2a66, 0x5ca62168, 0x63851042, 0x6a881b4c, 0x719f065e, 0x78920d50, 0x0fd9640a, 0x06d46f04, 0x1dc37216, 0x14ce7918, 0x2bed4832, 0x22e0433c, 0x39f75e2e, 0x30fa5520, 0x9ab701ec, 0x93ba0ae2, 0x88ad17f0, 0x81a01cfe, 0xbe832dd4, 0xb78e26da, 0xac993bc8, 0xa59430c6, 0xd2df599c, 0xdbd25292, 0xc0c54f80, 0xc9c8448e, 0xf6eb75a4, 0xffe67eaa, 0xe4f163b8, 0xedfc68b6, 0x0a67b10c, 0x036aba02, 0x187da710, 0x1170ac1e, 0x2e539d34, 0x275e963a, 0x3c498b28, 0x35448026, 0x420fe97c, 0x4b02e272, 0x5015ff60, 0x5918f46e, 0x663bc544, 0x6f36ce4a, 0x7421d358, 0x7d2cd856, 0xa10c7a37, 0xa8017139, 0xb3166c2b, 0xba1b6725, 0x8538560f, 0x8c355d01, 0x97224013, 0x9e2f4b1d, 0xe9642247, 0xe0692949, 0xfb7e345b, 0xf2733f55, 0xcd500e7f, 0xc45d0571, 0xdf4a1863, 0xd647136d, 0x31dccad7, 0x38d1c1d9, 0x23c6dccb, 0x2acbd7c5, 0x15e8e6ef, 0x1ce5ede1, 0x07f2f0f3, 0x0efffbfd, 0x79b492a7, 0x70b999a9, 0x6bae84bb, 0x62a38fb5, 0x5d80be9f, 0x548db591, 0x4f9aa883, 0x4697a38d];
-
-	    function convertToInt32(bytes) {
-	        var result = [];
-	        for (var i = 0; i < bytes.length; i += 4) {
-	            result.push(
-	                (bytes[i    ] << 24) |
-	                (bytes[i + 1] << 16) |
-	                (bytes[i + 2] <<  8) |
-	                 bytes[i + 3]
-	            );
-	        }
-	        return result;
-	    }
-
-	    var AES = function(key) {
-	        if (!(this instanceof AES)) {
-	            throw Error('AES must be instanitated with `new`');
-	        }
-
-	        Object.defineProperty(this, 'key', {
-	            value: coerceArray(key, true)
-	        });
-
-	        this._prepare();
-	    };
-
-
-	    AES.prototype._prepare = function() {
-
-	        var rounds = numberOfRounds[this.key.length];
-	        if (rounds == null) {
-	            throw new Error('invalid key size (must be 16, 24 or 32 bytes)');
-	        }
-
-	        // encryption round keys
-	        this._Ke = [];
-
-	        // decryption round keys
-	        this._Kd = [];
-
-	        for (var i = 0; i <= rounds; i++) {
-	            this._Ke.push([0, 0, 0, 0]);
-	            this._Kd.push([0, 0, 0, 0]);
-	        }
-
-	        var roundKeyCount = (rounds + 1) * 4;
-	        var KC = this.key.length / 4;
-
-	        // convert the key into ints
-	        var tk = convertToInt32(this.key);
-
-	        // copy values into round key arrays
-	        var index;
-	        for (var i = 0; i < KC; i++) {
-	            index = i >> 2;
-	            this._Ke[index][i % 4] = tk[i];
-	            this._Kd[rounds - index][i % 4] = tk[i];
-	        }
-
-	        // key expansion (fips-197 section 5.2)
-	        var rconpointer = 0;
-	        var t = KC, tt;
-	        while (t < roundKeyCount) {
-	            tt = tk[KC - 1];
-	            tk[0] ^= ((S[(tt >> 16) & 0xFF] << 24) ^
-	                      (S[(tt >>  8) & 0xFF] << 16) ^
-	                      (S[ tt        & 0xFF] <<  8) ^
-	                       S[(tt >> 24) & 0xFF]        ^
-	                      (rcon[rconpointer] << 24));
-	            rconpointer += 1;
-
-	            // key expansion (for non-256 bit)
-	            if (KC != 8) {
-	                for (var i = 1; i < KC; i++) {
-	                    tk[i] ^= tk[i - 1];
-	                }
-
-	            // key expansion for 256-bit keys is "slightly different" (fips-197)
-	            } else {
-	                for (var i = 1; i < (KC / 2); i++) {
-	                    tk[i] ^= tk[i - 1];
-	                }
-	                tt = tk[(KC / 2) - 1];
-
-	                tk[KC / 2] ^= (S[ tt        & 0xFF]        ^
-	                              (S[(tt >>  8) & 0xFF] <<  8) ^
-	                              (S[(tt >> 16) & 0xFF] << 16) ^
-	                              (S[(tt >> 24) & 0xFF] << 24));
-
-	                for (var i = (KC / 2) + 1; i < KC; i++) {
-	                    tk[i] ^= tk[i - 1];
-	                }
-	            }
-
-	            // copy values into round key arrays
-	            var i = 0, r, c;
-	            while (i < KC && t < roundKeyCount) {
-	                r = t >> 2;
-	                c = t % 4;
-	                this._Ke[r][c] = tk[i];
-	                this._Kd[rounds - r][c] = tk[i++];
-	                t++;
-	            }
-	        }
-
-	        // inverse-cipher-ify the decryption round key (fips-197 section 5.3)
-	        for (var r = 1; r < rounds; r++) {
-	            for (var c = 0; c < 4; c++) {
-	                tt = this._Kd[r][c];
-	                this._Kd[r][c] = (U1[(tt >> 24) & 0xFF] ^
-	                                  U2[(tt >> 16) & 0xFF] ^
-	                                  U3[(tt >>  8) & 0xFF] ^
-	                                  U4[ tt        & 0xFF]);
-	            }
-	        }
-	    };
-
-	    AES.prototype.encrypt = function(plaintext) {
-	        if (plaintext.length != 16) {
-	            throw new Error('invalid plaintext size (must be 16 bytes)');
-	        }
-
-	        var rounds = this._Ke.length - 1;
-	        var a = [0, 0, 0, 0];
-
-	        // convert plaintext to (ints ^ key)
-	        var t = convertToInt32(plaintext);
-	        for (var i = 0; i < 4; i++) {
-	            t[i] ^= this._Ke[0][i];
-	        }
-
-	        // apply round transforms
-	        for (var r = 1; r < rounds; r++) {
-	            for (var i = 0; i < 4; i++) {
-	                a[i] = (T1[(t[ i         ] >> 24) & 0xff] ^
-	                        T2[(t[(i + 1) % 4] >> 16) & 0xff] ^
-	                        T3[(t[(i + 2) % 4] >>  8) & 0xff] ^
-	                        T4[ t[(i + 3) % 4]        & 0xff] ^
-	                        this._Ke[r][i]);
-	            }
-	            t = a.slice();
-	        }
-
-	        // the last round is special
-	        var result = createArray(16), tt;
-	        for (var i = 0; i < 4; i++) {
-	            tt = this._Ke[rounds][i];
-	            result[4 * i    ] = (S[(t[ i         ] >> 24) & 0xff] ^ (tt >> 24)) & 0xff;
-	            result[4 * i + 1] = (S[(t[(i + 1) % 4] >> 16) & 0xff] ^ (tt >> 16)) & 0xff;
-	            result[4 * i + 2] = (S[(t[(i + 2) % 4] >>  8) & 0xff] ^ (tt >>  8)) & 0xff;
-	            result[4 * i + 3] = (S[ t[(i + 3) % 4]        & 0xff] ^  tt       ) & 0xff;
-	        }
-
-	        return result;
-	    };
-
-	    AES.prototype.decrypt = function(ciphertext) {
-	        if (ciphertext.length != 16) {
-	            throw new Error('invalid ciphertext size (must be 16 bytes)');
-	        }
-
-	        var rounds = this._Kd.length - 1;
-	        var a = [0, 0, 0, 0];
-
-	        // convert plaintext to (ints ^ key)
-	        var t = convertToInt32(ciphertext);
-	        for (var i = 0; i < 4; i++) {
-	            t[i] ^= this._Kd[0][i];
-	        }
-
-	        // apply round transforms
-	        for (var r = 1; r < rounds; r++) {
-	            for (var i = 0; i < 4; i++) {
-	                a[i] = (T5[(t[ i          ] >> 24) & 0xff] ^
-	                        T6[(t[(i + 3) % 4] >> 16) & 0xff] ^
-	                        T7[(t[(i + 2) % 4] >>  8) & 0xff] ^
-	                        T8[ t[(i + 1) % 4]        & 0xff] ^
-	                        this._Kd[r][i]);
-	            }
-	            t = a.slice();
-	        }
-
-	        // the last round is special
-	        var result = createArray(16), tt;
-	        for (var i = 0; i < 4; i++) {
-	            tt = this._Kd[rounds][i];
-	            result[4 * i    ] = (Si[(t[ i         ] >> 24) & 0xff] ^ (tt >> 24)) & 0xff;
-	            result[4 * i + 1] = (Si[(t[(i + 3) % 4] >> 16) & 0xff] ^ (tt >> 16)) & 0xff;
-	            result[4 * i + 2] = (Si[(t[(i + 2) % 4] >>  8) & 0xff] ^ (tt >>  8)) & 0xff;
-	            result[4 * i + 3] = (Si[ t[(i + 1) % 4]        & 0xff] ^  tt       ) & 0xff;
-	        }
-
-	        return result;
-	    };
-
-
-	    /**
-	     *  Mode Of Operation - Electonic Codebook (ECB)
-	     */
-	    var ModeOfOperationECB = function(key) {
-	        if (!(this instanceof ModeOfOperationECB)) {
-	            throw Error('AES must be instanitated with `new`');
-	        }
-
-	        this.description = "Electronic Code Block";
-	        this.name = "ecb";
-
-	        this._aes = new AES(key);
-	    };
-
-	    ModeOfOperationECB.prototype.encrypt = function(plaintext) {
-	        plaintext = coerceArray(plaintext);
-
-	        if ((plaintext.length % 16) !== 0) {
-	            throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
-	        }
-
-	        var ciphertext = createArray(plaintext.length);
-	        var block = createArray(16);
-
-	        for (var i = 0; i < plaintext.length; i += 16) {
-	            copyArray(plaintext, block, 0, i, i + 16);
-	            block = this._aes.encrypt(block);
-	            copyArray(block, ciphertext, i);
-	        }
-
-	        return ciphertext;
-	    };
-
-	    ModeOfOperationECB.prototype.decrypt = function(ciphertext) {
-	        ciphertext = coerceArray(ciphertext);
-
-	        if ((ciphertext.length % 16) !== 0) {
-	            throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
-	        }
-
-	        var plaintext = createArray(ciphertext.length);
-	        var block = createArray(16);
-
-	        for (var i = 0; i < ciphertext.length; i += 16) {
-	            copyArray(ciphertext, block, 0, i, i + 16);
-	            block = this._aes.decrypt(block);
-	            copyArray(block, plaintext, i);
-	        }
-
-	        return plaintext;
-	    };
-
-
-	    /**
-	     *  Mode Of Operation - Cipher Block Chaining (CBC)
-	     */
-	    var ModeOfOperationCBC = function(key, iv) {
-	        if (!(this instanceof ModeOfOperationCBC)) {
-	            throw Error('AES must be instanitated with `new`');
-	        }
-
-	        this.description = "Cipher Block Chaining";
-	        this.name = "cbc";
-
-	        if (!iv) {
-	            iv = createArray(16);
-
-	        } else if (iv.length != 16) {
-	            throw new Error('invalid initialation vector size (must be 16 bytes)');
-	        }
-
-	        this._lastCipherblock = coerceArray(iv, true);
-
-	        this._aes = new AES(key);
-	    };
-
-	    ModeOfOperationCBC.prototype.encrypt = function(plaintext) {
-	        plaintext = coerceArray(plaintext);
-
-	        if ((plaintext.length % 16) !== 0) {
-	            throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
-	        }
-
-	        var ciphertext = createArray(plaintext.length);
-	        var block = createArray(16);
-
-	        for (var i = 0; i < plaintext.length; i += 16) {
-	            copyArray(plaintext, block, 0, i, i + 16);
-
-	            for (var j = 0; j < 16; j++) {
-	                block[j] ^= this._lastCipherblock[j];
-	            }
-
-	            this._lastCipherblock = this._aes.encrypt(block);
-	            copyArray(this._lastCipherblock, ciphertext, i);
-	        }
-
-	        return ciphertext;
-	    };
-
-	    ModeOfOperationCBC.prototype.decrypt = function(ciphertext) {
-	        ciphertext = coerceArray(ciphertext);
-
-	        if ((ciphertext.length % 16) !== 0) {
-	            throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
-	        }
-
-	        var plaintext = createArray(ciphertext.length);
-	        var block = createArray(16);
-
-	        for (var i = 0; i < ciphertext.length; i += 16) {
-	            copyArray(ciphertext, block, 0, i, i + 16);
-	            block = this._aes.decrypt(block);
-
-	            for (var j = 0; j < 16; j++) {
-	                plaintext[i + j] = block[j] ^ this._lastCipherblock[j];
-	            }
-
-	            copyArray(ciphertext, this._lastCipherblock, 0, i, i + 16);
-	        }
-
-	        return plaintext;
-	    };
-
-
-	    /**
-	     *  Mode Of Operation - Cipher Feedback (CFB)
-	     */
-	    var ModeOfOperationCFB = function(key, iv, segmentSize) {
-	        if (!(this instanceof ModeOfOperationCFB)) {
-	            throw Error('AES must be instanitated with `new`');
-	        }
-
-	        this.description = "Cipher Feedback";
-	        this.name = "cfb";
-
-	        if (!iv) {
-	            iv = createArray(16);
-
-	        } else if (iv.length != 16) {
-	            throw new Error('invalid initialation vector size (must be 16 size)');
-	        }
-
-	        if (!segmentSize) { segmentSize = 1; }
-
-	        this.segmentSize = segmentSize;
-
-	        this._shiftRegister = coerceArray(iv, true);
-
-	        this._aes = new AES(key);
-	    };
-
-	    ModeOfOperationCFB.prototype.encrypt = function(plaintext) {
-	        if ((plaintext.length % this.segmentSize) != 0) {
-	            throw new Error('invalid plaintext size (must be segmentSize bytes)');
-	        }
-
-	        var encrypted = coerceArray(plaintext, true);
-
-	        var xorSegment;
-	        for (var i = 0; i < encrypted.length; i += this.segmentSize) {
-	            xorSegment = this._aes.encrypt(this._shiftRegister);
-	            for (var j = 0; j < this.segmentSize; j++) {
-	                encrypted[i + j] ^= xorSegment[j];
-	            }
-
-	            // Shift the register
-	            copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
-	            copyArray(encrypted, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
-	        }
-
-	        return encrypted;
-	    };
-
-	    ModeOfOperationCFB.prototype.decrypt = function(ciphertext) {
-	        if ((ciphertext.length % this.segmentSize) != 0) {
-	            throw new Error('invalid ciphertext size (must be segmentSize bytes)');
-	        }
-
-	        var plaintext = coerceArray(ciphertext, true);
-
-	        var xorSegment;
-	        for (var i = 0; i < plaintext.length; i += this.segmentSize) {
-	            xorSegment = this._aes.encrypt(this._shiftRegister);
-
-	            for (var j = 0; j < this.segmentSize; j++) {
-	                plaintext[i + j] ^= xorSegment[j];
-	            }
-
-	            // Shift the register
-	            copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
-	            copyArray(ciphertext, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
-	        }
-
-	        return plaintext;
-	    };
-
-	    /**
-	     *  Mode Of Operation - Output Feedback (OFB)
-	     */
-	    var ModeOfOperationOFB = function(key, iv) {
-	        if (!(this instanceof ModeOfOperationOFB)) {
-	            throw Error('AES must be instanitated with `new`');
-	        }
-
-	        this.description = "Output Feedback";
-	        this.name = "ofb";
-
-	        if (!iv) {
-	            iv = createArray(16);
-
-	        } else if (iv.length != 16) {
-	            throw new Error('invalid initialation vector size (must be 16 bytes)');
-	        }
-
-	        this._lastPrecipher = coerceArray(iv, true);
-	        this._lastPrecipherIndex = 16;
-
-	        this._aes = new AES(key);
-	    };
-
-	    ModeOfOperationOFB.prototype.encrypt = function(plaintext) {
-	        var encrypted = coerceArray(plaintext, true);
-
-	        for (var i = 0; i < encrypted.length; i++) {
-	            if (this._lastPrecipherIndex === 16) {
-	                this._lastPrecipher = this._aes.encrypt(this._lastPrecipher);
-	                this._lastPrecipherIndex = 0;
-	            }
-	            encrypted[i] ^= this._lastPrecipher[this._lastPrecipherIndex++];
-	        }
-
-	        return encrypted;
-	    };
-
-	    // Decryption is symetric
-	    ModeOfOperationOFB.prototype.decrypt = ModeOfOperationOFB.prototype.encrypt;
-
-
-	    /**
-	     *  Counter object for CTR common mode of operation
-	     */
-	    var Counter = function(initialValue) {
-	        if (!(this instanceof Counter)) {
-	            throw Error('Counter must be instanitated with `new`');
-	        }
-
-	        // We allow 0, but anything false-ish uses the default 1
-	        if (initialValue !== 0 && !initialValue) { initialValue = 1; }
-
-	        if (typeof(initialValue) === 'number') {
-	            this._counter = createArray(16);
-	            this.setValue(initialValue);
-
-	        } else {
-	            this.setBytes(initialValue);
-	        }
-	    };
-
-	    Counter.prototype.setValue = function(value) {
-	        if (typeof(value) !== 'number' || parseInt(value) != value) {
-	            throw new Error('invalid counter value (must be an integer)');
-	        }
-
-	        // We cannot safely handle numbers beyond the safe range for integers
-	        if (value > Number.MAX_SAFE_INTEGER) {
-	            throw new Error('integer value out of safe range');
-	        }
-
-	        for (var index = 15; index >= 0; --index) {
-	            this._counter[index] = value % 256;
-	            value = parseInt(value / 256);
-	        }
-	    };
-
-	    Counter.prototype.setBytes = function(bytes) {
-	        bytes = coerceArray(bytes, true);
-
-	        if (bytes.length != 16) {
-	            throw new Error('invalid counter bytes size (must be 16 bytes)');
-	        }
-
-	        this._counter = bytes;
-	    };
-
-	    Counter.prototype.increment = function() {
-	        for (var i = 15; i >= 0; i--) {
-	            if (this._counter[i] === 255) {
-	                this._counter[i] = 0;
-	            } else {
-	                this._counter[i]++;
-	                break;
-	            }
-	        }
-	    };
-
-
-	    /**
-	     *  Mode Of Operation - Counter (CTR)
-	     */
-	    var ModeOfOperationCTR = function(key, counter) {
-	        if (!(this instanceof ModeOfOperationCTR)) {
-	            throw Error('AES must be instanitated with `new`');
-	        }
-
-	        this.description = "Counter";
-	        this.name = "ctr";
-
-	        if (!(counter instanceof Counter)) {
-	            counter = new Counter(counter);
-	        }
-
-	        this._counter = counter;
-
-	        this._remainingCounter = null;
-	        this._remainingCounterIndex = 16;
-
-	        this._aes = new AES(key);
-	    };
-
-	    ModeOfOperationCTR.prototype.encrypt = function(plaintext) {
-	        var encrypted = coerceArray(plaintext, true);
-
-	        for (var i = 0; i < encrypted.length; i++) {
-	            if (this._remainingCounterIndex === 16) {
-	                this._remainingCounter = this._aes.encrypt(this._counter._counter);
-	                this._remainingCounterIndex = 0;
-	                this._counter.increment();
-	            }
-	            encrypted[i] ^= this._remainingCounter[this._remainingCounterIndex++];
-	        }
-
-	        return encrypted;
-	    };
-
-	    // Decryption is symetric
-	    ModeOfOperationCTR.prototype.decrypt = ModeOfOperationCTR.prototype.encrypt;
-
-
-	    ///////////////////////
-	    // Padding
-
-	    // See:https://tools.ietf.org/html/rfc2315
-	    function pkcs7pad(data) {
-	        data = coerceArray(data, true);
-	        var padder = 16 - (data.length % 16);
-	        var result = createArray(data.length + padder);
-	        copyArray(data, result);
-	        for (var i = data.length; i < result.length; i++) {
-	            result[i] = padder;
-	        }
-	        return result;
-	    }
-
-	    function pkcs7strip(data) {
-	        data = coerceArray(data, true);
-	        if (data.length < 16) { throw new Error('PKCS#7 invalid length'); }
-
-	        var padder = data[data.length - 1];
-	        if (padder > 16) { throw new Error('PKCS#7 padding byte out of range'); }
-
-	        var length = data.length - padder;
-	        for (var i = 0; i < padder; i++) {
-	            if (data[length + i] !== padder) {
-	                throw new Error('PKCS#7 invalid padding byte');
-	            }
-	        }
-
-	        var result = createArray(length);
-	        copyArray(data, result, 0, 0, length);
-	        return result;
-	    }
-
-	    ///////////////////////
-	    // Exporting
-
-
-	    // The block cipher
-	    var aesjs = {
-	        AES: AES,
-	        Counter: Counter,
-
-	        ModeOfOperation: {
-	            ecb: ModeOfOperationECB,
-	            cbc: ModeOfOperationCBC,
-	            cfb: ModeOfOperationCFB,
-	            ofb: ModeOfOperationOFB,
-	            ctr: ModeOfOperationCTR
-	        },
-
-	        utils: {
-	            hex: convertHex,
-	            utf8: convertUtf8
-	        },
-
-	        padding: {
-	            pkcs7: {
-	                pad: pkcs7pad,
-	                strip: pkcs7strip
-	            }
-	        },
-
-	        _arrayTest: {
-	            coerceArray: coerceArray,
-	            createArray: createArray,
-	            copyArray: copyArray,
-	        }
-	    };
-
-
-	    // node.js
-	    {
-	        module.exports = aesjs;
-
-	    // RequireJS/AMD
-	    // http://www.requirejs.org/docs/api.html
-	    // https://github.com/amdjs/amdjs-api/wiki/AMD
-	    }
-
-
-	})();
-	});
-
-	// See https://github.com/ricmoo/aes-js
-	// We can use keys that are 128 bits (16 bytes), 192 bits (24 bytes) or 256 bits (32 bytes).
-	// To generate a random key:  window.crypto.getRandomValues(new Uint8Array(16));
-
-	// This default signing key is built into iD and can be used to mask/unmask sensitive values.
-	var DEFAULT_128 = [250, 157, 60, 79, 142, 134, 229, 129, 138, 126, 210, 129, 29, 71, 160, 208];
-
-
-	function utilAesEncrypt(text, key) {
-	  key = key || DEFAULT_128;
-	  var textBytes = aesJs.utils.utf8.toBytes(text);
-	  var aesCtr = new aesJs.ModeOfOperation.ctr(key);
-	  var encryptedBytes = aesCtr.encrypt(textBytes);
-	  var encryptedHex = aesJs.utils.hex.fromBytes(encryptedBytes);
-	  return encryptedHex;
-	}
-
-
-	function utilAesDecrypt(encryptedHex, key) {
-	  key = key || DEFAULT_128;
-	  var encryptedBytes = aesJs.utils.hex.toBytes(encryptedHex);
-	  var aesCtr = new aesJs.ModeOfOperation.ctr(key);
-	  var decryptedBytes = aesCtr.decrypt(encryptedBytes);
-	  var text = aesJs.utils.utf8.fromBytes(decryptedBytes);
-	  return text;
-	}
-
-	function utilCleanTags(tags) {
-	    var out = {};
-	    for (var k in tags) {
-	        if (!k) { continue; }
-	        var v = tags[k];
-	        if (v !== undefined) {
-	            out[k] = cleanValue(k, v);
-	        }
-	    }
-
-	    return out;
-
-
-	    function cleanValue(k, v) {
-	        function keepSpaces(k) {
-	            return /_hours|_times|:conditional$/.test(k);
-	        }
-
-	        function skip(k) {
-	            return /^(description|note|fixme)$/.test(k);
-	        }
-
-	        if (skip(k)) { return v; }
-
-	        var cleaned = v
-	            .split(';')
-	            .map(function(s) { return s.trim(); })
-	            .join(keepSpaces(k) ? '; ' : ';');
-
-	        // The code below is not intended to validate websites and emails.
-	        // It is only intended to prevent obvious copy-paste errors. (#2323)
-	        // clean website- and email-like tags
-	        if (k.indexOf('website') !== -1 ||
-	            k.indexOf('email') !== -1 ||
-	            cleaned.indexOf('http') === 0) {
-	            cleaned = cleaned
-	                .replace(/[\u200B-\u200F\uFEFF]/g, '');  // strip LRM and other zero width chars
-
-	        }
-
-	        return cleaned;
-	    }
-	}
-
-	// Like selection.property('value', ...), but avoids no-op value sets,
-	// which can result in layout/repaint thrashing in some situations.
-	function utilGetSetValue(selection, value) {
-	    function d3_selection_value(value) {
-	        function valueNull() {
-	            delete this.value;
-	        }
-
-	        function valueConstant() {
-	            if (this.value !== value) {
-	                this.value = value;
-	            }
-	        }
-
-	        function valueFunction() {
-	            var x = value.apply(this, arguments);
-	            if (x == null) {
-	                delete this.value;
-	            } else if (this.value !== x) {
-	                this.value = x;
-	            }
-	        }
-
-	        return value == null
-	            ? valueNull : (typeof value === 'function'
-	            ? valueFunction : valueConstant);
-	    }
-
-	    if (arguments.length === 1) {
-	        return selection.property('value');
-	    }
-
-	    return selection.each(d3_selection_value(value));
-	}
-
-	function utilKeybinding(namespace) {
-	    var _keybindings = {};
-
-
-	    function testBindings(isCapturing) {
-	        var didMatch = false;
-	        var bindings = Object.keys(_keybindings).map(function(id) { return _keybindings[id]; });
-	        var i, binding;
-
-	        // Most key shortcuts will accept either lower or uppercase ('h' or 'H'),
-	        // so we don't strictly match on the shift key, but we prioritize
-	        // shifted keybindings first, and fallback to unshifted only if no match.
-	        // (This lets us differentiate between '←'/'⇧←' or '⌘Z'/'⌘⇧Z')
-
-	        // priority match shifted keybindings first
-	        for (i = 0; i < bindings.length; i++) {
-	            binding = bindings[i];
-	            if (!binding.event.modifiers.shiftKey) { continue; }  // no shift
-	            if (!!binding.capture !== isCapturing) { continue; }
-	            if (matches(binding, true)) {
-	                binding.callback();
-	                didMatch = true;
-	            }
-	        }
-
-	        // then unshifted keybindings
-	        if (didMatch) { return; }
-	        for (i = 0; i < bindings.length; i++) {
-	            binding = bindings[i];
-	            if (binding.event.modifiers.shiftKey) { continue; }   // shift
-	            if (!!binding.capture !== isCapturing) { continue; }
-	            if (matches(binding, false)) {
-	                binding.callback();
-	            }
-	        }
-
-
-	        function matches(binding, testShift) {
-	            var event$1 = event;
-	            var isMatch = false;
-	            var tryKeyCode = true;
-
-	            // Prefer a match on `KeyboardEvent.key`
-	            if (event$1.key !== undefined) {
-	                tryKeyCode = (event$1.key.charCodeAt(0) > 255);  // outside ISO-Latin-1
-	                isMatch = true;
-
-	                if (binding.event.key === undefined) {
-	                    isMatch = false;
-	                } else if (Array.isArray(binding.event.key)) {
-	                    if (binding.event.key.map(function(s) { return s.toLowerCase(); }).indexOf(event$1.key.toLowerCase()) === -1)
-	                        { isMatch = false; }
-	                } else {
-	                    if (event$1.key.toLowerCase() !== binding.event.key.toLowerCase())
-	                        { isMatch = false; }
-	                }
-	            }
-
-	            // Fallback match on `KeyboardEvent.keyCode`, can happen if:
-	            // - browser doesn't support `KeyboardEvent.key`
-	            // - `KeyboardEvent.key` is outside ISO-Latin-1 range (cyrillic?)
-	            if (!isMatch && tryKeyCode) {
-	                isMatch = (event$1.keyCode === binding.event.keyCode);
-	            }
-
-	            if (!isMatch) { return false; }
-
-	            // test modifier keys
-	            if (!(event$1.ctrlKey && event$1.altKey)) {  // if both are set, assume AltGr and skip it - #4096
-	                if (event$1.ctrlKey !== binding.event.modifiers.ctrlKey) { return false; }
-	                if (event$1.altKey !== binding.event.modifiers.altKey) { return false; }
-	            }
-	            if (event$1.metaKey !== binding.event.modifiers.metaKey) { return false; }
-	            if (testShift && event$1.shiftKey !== binding.event.modifiers.shiftKey) { return false; }
-
-	            return true;
-	        }
-	    }
-
-
-	    function capture() {
-	        testBindings(true);
-	    }
-
-
-	    function bubble() {
-	        var tagName = select(event.target).node().tagName;
-	        if (tagName === 'INPUT' || tagName === 'SELECT' || tagName === 'TEXTAREA') {
-	            return;
-	        }
-	        testBindings(false);
-	    }
-
-
-	    function keybinding(selection) {
-	        selection = selection || select(document);
-	        selection.on('keydown.capture.' + namespace, capture, true);
-	        selection.on('keydown.bubble.' + namespace, bubble, false);
-	        return keybinding;
-	    }
-
-	    // was: keybinding.off()
-	    keybinding.unbind = function(selection) {
-	        _keybindings = [];
-	        selection = selection || select(document);
-	        selection.on('keydown.capture.' + namespace, null);
-	        selection.on('keydown.bubble.' + namespace, null);
-	        return keybinding;
-	    };
-
-
-	    keybinding.clear = function() {
-	        _keybindings = {};
-	        return keybinding;
-	    };
-
-
-	    // Remove one or more keycode bindings.
-	    keybinding.off = function(codes, capture) {
-	        var arr = utilArrayUniq([].concat(codes));
-
-	        for (var i = 0; i < arr.length; i++) {
-	            var id = arr[i] + (capture ? '-capture' : '-bubble');
-	            delete _keybindings[id];
-	        }
-	        return keybinding;
-	    };
-
-
-	    // Add one or more keycode bindings.
-	    keybinding.on = function(codes, callback, capture) {
-	        if (typeof callback !== 'function') {
-	            return keybinding.off(codes, capture);
-	        }
-
-	        var arr = utilArrayUniq([].concat(codes));
-
-	        for (var i = 0; i < arr.length; i++) {
-	            var id = arr[i] + (capture ? '-capture' : '-bubble');
-	            var binding = {
-	                id: id,
-	                capture: capture,
-	                callback: callback,
-	                event: {
-	                    key: undefined,  // preferred
-	                    keyCode: 0,      // fallback
-	                    modifiers: {
-	                        shiftKey: false,
-	                        ctrlKey: false,
-	                        altKey: false,
-	                        metaKey: false
-	                    }
-	                }
-	            };
-
-	            if (_keybindings[id]) {
-	                console.warn('warning: duplicate keybinding for "' + id + '"'); // eslint-disable-line no-console
-	            }
-
-	            _keybindings[id] = binding;
-
-	            var matches = arr[i].toLowerCase().match(/(?:(?:[^+⇧⌃⌥⌘])+|[⇧⌃⌥⌘]|\+\+|^\+$)/g);
-	            for (var j = 0; j < matches.length; j++) {
-	                // Normalise matching errors
-	                if (matches[j] === '++') { matches[j] = '+'; }
-
-	                if (matches[j] in utilKeybinding.modifierCodes) {
-	                    var prop = utilKeybinding.modifierProperties[utilKeybinding.modifierCodes[matches[j]]];
-	                    binding.event.modifiers[prop] = true;
-	                } else {
-	                    binding.event.key = utilKeybinding.keys[matches[j]] || matches[j];
-	                    if (matches[j] in utilKeybinding.keyCodes) {
-	                        binding.event.keyCode = utilKeybinding.keyCodes[matches[j]];
-	                    }
-	                }
-	            }
-	        }
-
-	        return keybinding;
-	    };
-
-
-	    return keybinding;
-	}
-
-
-	/*
-	 * See https://github.com/keithamus/jwerty
-	 */
-
-	utilKeybinding.modifierCodes = {
-	    // Shift key, ⇧
-	    '⇧': 16, shift: 16,
-	    // CTRL key, on Mac: ⌃
-	    '⌃': 17, ctrl: 17,
-	    // ALT key, on Mac: ⌥ (Alt)
-	    '⌥': 18, alt: 18, option: 18,
-	    // META, on Mac: ⌘ (CMD), on Windows (Win), on Linux (Super)
-	    '⌘': 91, meta: 91, cmd: 91, 'super': 91, win: 91
-	};
-
-	utilKeybinding.modifierProperties = {
-	    16: 'shiftKey',
-	    17: 'ctrlKey',
-	    18: 'altKey',
-	    91: 'metaKey'
-	};
-
-	utilKeybinding.keys = {
-	    // Backspace key, on Mac: ⌫ (Backspace)
-	    '⌫': 'Backspace', backspace: 'Backspace',
-	    // Tab Key, on Mac: ⇥ (Tab), on Windows ⇥⇥
-	    '⇥': 'Tab', '⇆': 'Tab', tab: 'Tab',
-	    // Return key, ↩
-	    '↩': 'Enter', 'return': 'Enter', enter: 'Enter', '⌅': 'Enter',
-	    // Pause/Break key
-	    'pause': 'Pause', 'pause-break': 'Pause',
-	    // Caps Lock key, ⇪
-	    '⇪': 'CapsLock', caps: 'CapsLock', 'caps-lock': 'CapsLock',
-	    // Escape key, on Mac: ⎋, on Windows: Esc
-	    '⎋': ['Escape', 'Esc'], escape: ['Escape', 'Esc'], esc: ['Escape', 'Esc'],
-	    // Space key
-	    space: [' ', 'Spacebar'],
-	    // Page-Up key, or pgup, on Mac: ↖
-	    '↖': 'PageUp', pgup: 'PageUp', 'page-up': 'PageUp',
-	    // Page-Down key, or pgdown, on Mac: ↘
-	    '↘': 'PageDown', pgdown: 'PageDown', 'page-down': 'PageDown',
-	    // END key, on Mac: ⇟
-	    '⇟': 'End', end: 'End',
-	    // HOME key, on Mac: ⇞
-	    '⇞': 'Home', home: 'Home',
-	    // Insert key, or ins
-	    ins: 'Insert', insert: 'Insert',
-	    // Delete key, on Mac: ⌦ (Delete)
-	    '⌦': ['Delete', 'Del'], del: ['Delete', 'Del'], 'delete': ['Delete', 'Del'],
-	    // Left Arrow Key, or ←
-	    '←': ['ArrowLeft', 'Left'], left: ['ArrowLeft', 'Left'], 'arrow-left': ['ArrowLeft', 'Left'],
-	    // Up Arrow Key, or ↑
-	    '↑': ['ArrowUp', 'Up'], up: ['ArrowUp', 'Up'], 'arrow-up': ['ArrowUp', 'Up'],
-	    // Right Arrow Key, or →
-	    '→': ['ArrowRight', 'Right'], right: ['ArrowRight', 'Right'], 'arrow-right': ['ArrowRight', 'Right'],
-	    // Up Arrow Key, or ↓
-	    '↓': ['ArrowDown', 'Down'], down: ['ArrowDown', 'Down'], 'arrow-down': ['ArrowDown', 'Down'],
-	    // odities, stuff for backward compatibility (browsers and code):
-	    // Num-Multiply, or *
-	    '*': ['*', 'Multiply'], star: ['*', 'Multiply'], asterisk: ['*', 'Multiply'], multiply: ['*', 'Multiply'],
-	    // Num-Plus or +
-	    '+': ['+', 'Add'], 'plus': ['+', 'Add'],
-	    // Num-Subtract, or -
-	    '-': ['-', 'Subtract'], subtract: ['-', 'Subtract'], 'dash': ['-', 'Subtract'],
-	    // Semicolon
-	    semicolon: ';',
-	    // = or equals
-	    equals: '=',
-	    // Comma, or ,
-	    comma: ',',
-	    // Period, or ., or full-stop
-	    period: '.', 'full-stop': '.',
-	    // Slash, or /, or forward-slash
-	    slash: '/', 'forward-slash': '/',
-	    // Tick, or `, or back-quote
-	    tick: '`', 'back-quote': '`',
-	    // Open bracket, or [
-	    'open-bracket': '[',
-	    // Back slash, or \
-	    'back-slash': '\\',
-	    // Close backet, or ]
-	    'close-bracket': ']',
-	    // Apostrophe, or Quote, or '
-	    quote: '\'', apostrophe: '\'',
-	    // NUMPAD 0-9
-	    'num-0': '0',
-	    'num-1': '1',
-	    'num-2': '2',
-	    'num-3': '3',
-	    'num-4': '4',
-	    'num-5': '5',
-	    'num-6': '6',
-	    'num-7': '7',
-	    'num-8': '8',
-	    'num-9': '9',
-	    // F1-F25
-	    f1: 'F1',
-	    f2: 'F2',
-	    f3: 'F3',
-	    f4: 'F4',
-	    f5: 'F5',
-	    f6: 'F6',
-	    f7: 'F7',
-	    f8: 'F8',
-	    f9: 'F9',
-	    f10: 'F10',
-	    f11: 'F11',
-	    f12: 'F12',
-	    f13: 'F13',
-	    f14: 'F14',
-	    f15: 'F15',
-	    f16: 'F16',
-	    f17: 'F17',
-	    f18: 'F18',
-	    f19: 'F19',
-	    f20: 'F20',
-	    f21: 'F21',
-	    f22: 'F22',
-	    f23: 'F23',
-	    f24: 'F24',
-	    f25: 'F25'
-	};
-
-	utilKeybinding.keyCodes = {
-	    // Backspace key, on Mac: ⌫ (Backspace)
-	    '⌫': 8, backspace: 8,
-	    // Tab Key, on Mac: ⇥ (Tab), on Windows ⇥⇥
-	    '⇥': 9, '⇆': 9, tab: 9,
-	    // Return key, ↩
-	    '↩': 13, 'return': 13, enter: 13, '⌅': 13,
-	    // Pause/Break key
-	    'pause': 19, 'pause-break': 19,
-	    // Caps Lock key, ⇪
-	    '⇪': 20, caps: 20, 'caps-lock': 20,
-	    // Escape key, on Mac: ⎋, on Windows: Esc
-	    '⎋': 27, escape: 27, esc: 27,
-	    // Space key
-	    space: 32,
-	    // Page-Up key, or pgup, on Mac: ↖
-	    '↖': 33, pgup: 33, 'page-up': 33,
-	    // Page-Down key, or pgdown, on Mac: ↘
-	    '↘': 34, pgdown: 34, 'page-down': 34,
-	    // END key, on Mac: ⇟
-	    '⇟': 35, end: 35,
-	    // HOME key, on Mac: ⇞
-	    '⇞': 36, home: 36,
-	    // Insert key, or ins
-	    ins: 45, insert: 45,
-	    // Delete key, on Mac: ⌦ (Delete)
-	    '⌦': 46, del: 46, 'delete': 46,
-	    // Left Arrow Key, or ←
-	    '←': 37, left: 37, 'arrow-left': 37,
-	    // Up Arrow Key, or ↑
-	    '↑': 38, up: 38, 'arrow-up': 38,
-	    // Right Arrow Key, or →
-	    '→': 39, right: 39, 'arrow-right': 39,
-	    // Up Arrow Key, or ↓
-	    '↓': 40, down: 40, 'arrow-down': 40,
-	    // odities, printing characters that come out wrong:
-	    // Firefox Equals
-	    'ffequals': 61,
-	    // Num-Multiply, or *
-	    '*': 106, star: 106, asterisk: 106, multiply: 106,
-	    // Num-Plus or +
-	    '+': 107, 'plus': 107,
-	    // Num-Subtract, or -
-	    '-': 109, subtract: 109,
-	    // Firefox Plus
-	    'ffplus': 171,
-	    // Firefox Minus
-	    'ffminus': 173,
-	    // Semicolon
-	    ';': 186, semicolon: 186,
-	    // = or equals
-	    '=': 187, 'equals': 187,
-	    // Comma, or ,
-	    ',': 188, comma: 188,
-	    // Dash / Underscore key
-	    'dash': 189,
-	    // Period, or ., or full-stop
-	    '.': 190, period: 190, 'full-stop': 190,
-	    // Slash, or /, or forward-slash
-	    '/': 191, slash: 191, 'forward-slash': 191,
-	    // Tick, or `, or back-quote
-	    '`': 192, tick: 192, 'back-quote': 192,
-	    // Open bracket, or [
-	    '[': 219, 'open-bracket': 219,
-	    // Back slash, or \
-	    '\\': 220, 'back-slash': 220,
-	    // Close backet, or ]
-	    ']': 221, 'close-bracket': 221,
-	    // Apostrophe, or Quote, or '
-	    '\'': 222, quote: 222, apostrophe: 222
-	};
-
-	// NUMPAD 0-9
-	var i$2 = 95, n = 0;
-	while (++i$2 < 106) {
-	    utilKeybinding.keyCodes['num-' + n] = i$2;
-	    ++n;
-	}
-
-	// 0-9
-	i$2 = 47; n = 0;
-	while (++i$2 < 58) {
-	    utilKeybinding.keyCodes[n] = i$2;
-	    ++n;
-	}
-
-	// F1-F25
-	i$2 = 111; n = 1;
-	while (++i$2 < 136) {
-	    utilKeybinding.keyCodes['f' + n] = i$2;
-	    ++n;
-	}
-
-	// a-z
-	i$2 = 64;
-	while (++i$2 < 91) {
-	    utilKeybinding.keyCodes[String.fromCharCode(i$2).toLowerCase()] = i$2;
-	}
-
-	function utilObjectOmit(obj, omitKeys) {
-	    return Object.keys(obj).reduce(function(result, key) {
-	        if (omitKeys.indexOf(key) === -1) {
-	            result[key] = obj[key];  // keep
-	        }
-	        return result;
-	    }, {});
-	}
-
-	// Copies a variable number of methods from source to target.
-	function utilRebind(target, source) {
-	    var arguments$1 = arguments;
-
-	    var i = 1, n = arguments.length, method;
-	    while (++i < n) {
-	        target[method = arguments$1[i]] = d3_rebind(target, source, source[method]);
-	    }
-	    return target;
-	}
-
-	// Method is assumed to be a standard D3 getter-setter:
-	// If passed with no arguments, gets the value.
-	// If passed with arguments, sets the value and returns the target.
-	function d3_rebind(target, source, method) {
-	    return function() {
-	        var value = method.apply(source, arguments);
-	        return value === source ? target : value;
-	    };
-	}
-
-	// A per-domain session mutex backed by a cookie and dead man's
-	// switch. If the session crashes, the mutex will auto-release
-	// after 5 seconds.
-
-	// This accepts a string and returns an object that complies with utilSessionMutexType
-	function utilSessionMutex(name) {
-	    var mutex = {};
-	    var intervalID;
-
-	    function renew() {
-	        var expires = new Date();
-	        expires.setSeconds(expires.getSeconds() + 5);
-	        document.cookie = name + '=1; expires=' + expires.toUTCString() + '; sameSite=strict';
-	    }
-
-	    mutex.lock = function () {
-	        if (intervalID) { return true; }
-	        var cookie = document.cookie.replace(new RegExp('(?:(?:^|.*;)\\s*' + name + '\\s*\\=\\s*([^;]*).*$)|^.*$'), '$1');
-	        if (cookie) { return false; }
-	        renew();
-	        intervalID = window.setInterval(renew, 4000);
-	        return true;
-	    };
-
-	    mutex.unlock = function () {
-	        if (!intervalID) { return; }
-	        document.cookie = name + '=; expires=Thu, 01 Jan 1970 00:00:00 GMT; sameSite=strict';
-	        clearInterval(intervalID);
-	        intervalID = null;
-	    };
-
-	    mutex.locked = function () {
-	        return !!intervalID;
-	    };
-
-	    return mutex;
-	}
-
-	function utilTiler() {
-	    var _size = [256, 256];
-	    var _scale = 256;
-	    var _tileSize = 256;
-	    var _zoomExtent = [0, 20];
-	    var _translate = [_size[0] / 2, _size[1] / 2];
-	    var _margin = 0;
-	    var _skipNullIsland = false;
-
-
-	    function clamp(num, min, max) {
-	        return Math.max(min, Math.min(num, max));
-	    }
-
-
-	    function nearNullIsland(tile) {
-	        var x = tile[0];
-	        var y = tile[1];
-	        var z = tile[2];
-	        if (z >= 7) {
-	            var center = Math.pow(2, z - 1);
-	            var width = Math.pow(2, z - 6);
-	            var min = center - (width / 2);
-	            var max = center + (width / 2) - 1;
-	            return x >= min && x <= max && y >= min && y <= max;
-	        }
-	        return false;
-	    }
-
-
-	    function tiler() {
-	        var z = geoScaleToZoom(_scale / (2 * Math.PI), _tileSize);
-	        var z0 = clamp(Math.round(z), _zoomExtent[0], _zoomExtent[1]);
-	        var tileMin = 0;
-	        var tileMax = Math.pow(2, z0) - 1;
-	        var log2ts = Math.log(_tileSize) * Math.LOG2E;
-	        var k = Math.pow(2, z - z0 + log2ts);
-	        var origin = [
-	            (_translate[0] - _scale / 2) / k,
-	            (_translate[1] - _scale / 2) / k
-	        ];
-
-	        var cols = range$1(
-	            clamp(Math.floor(-origin[0]) - _margin,               tileMin, tileMax + 1),
-	            clamp(Math.ceil(_size[0] / k - origin[0]) + _margin,  tileMin, tileMax + 1)
-	        );
-	        var rows = range$1(
-	            clamp(Math.floor(-origin[1]) - _margin,               tileMin, tileMax + 1),
-	            clamp(Math.ceil(_size[1] / k - origin[1]) + _margin,  tileMin, tileMax + 1)
-	        );
-
-	        var tiles = [];
-	        for (var i = 0; i < rows.length; i++) {
-	            var y = rows[i];
-	            for (var j = 0; j < cols.length; j++) {
-	                var x = cols[j];
-
-	                if (i >= _margin && i <= rows.length - _margin &&
-	                    j >= _margin && j <= cols.length - _margin) {
-	                    tiles.unshift([x, y, z0]);  // tiles in view at beginning
-	                } else {
-	                    tiles.push([x, y, z0]);     // tiles in margin at the end
-	                }
-	            }
-	        }
-
-	        tiles.translate = origin;
-	        tiles.scale = k;
-
-	        return tiles;
-	    }
-
-
-	    /**
-	     * getTiles() returns an array of tiles that cover the map view
-	     */
-	    tiler.getTiles = function(projection) {
-	        var origin = [
-	            projection.scale() * Math.PI - projection.translate()[0],
-	            projection.scale() * Math.PI - projection.translate()[1]
-	        ];
-
-	        this
-	            .size(projection.clipExtent()[1])
-	            .scale(projection.scale() * 2 * Math.PI)
-	            .translate(projection.translate());
-
-	        var tiles = tiler();
-	        var ts = tiles.scale;
-
-	        return tiles
-	            .map(function(tile) {
-	                if (_skipNullIsland && nearNullIsland(tile)) {
-	                    return false;
-	                }
-	                var x = tile[0] * ts - origin[0];
-	                var y = tile[1] * ts - origin[1];
-	                return {
-	                    id: tile.toString(),
-	                    xyz: tile,
-	                    extent: geoExtent(
-	                        projection.invert([x, y + ts]),
-	                        projection.invert([x + ts, y])
-	                    )
-	                };
-	            }).filter(Boolean);
-	    };
-
-
-	    /**
-	     * getGeoJSON() returns a FeatureCollection for debugging tiles
-	     */
-	    tiler.getGeoJSON = function(projection) {
-	        var features = tiler.getTiles(projection).map(function(tile) {
-	            return {
-	                type: 'Feature',
-	                properties: {
-	                    id: tile.id,
-	                    name: tile.id
-	                },
-	                geometry: {
-	                    type: 'Polygon',
-	                    coordinates: [ tile.extent.polygon() ]
-	                }
-	            };
-	        });
-
-	        return {
-	            type: 'FeatureCollection',
-	            features: features
-	        };
-	    };
-
-
-	    tiler.tileSize = function(val) {
-	        if (!arguments.length) { return _tileSize; }
-	        _tileSize = val;
-	        return tiler;
-	    };
-
-
-	    tiler.zoomExtent = function(val) {
-	        if (!arguments.length) { return _zoomExtent; }
-	        _zoomExtent = val;
-	        return tiler;
-	    };
-
-
-	    tiler.size = function(val) {
-	        if (!arguments.length) { return _size; }
-	        _size = val;
-	        return tiler;
-	    };
-
-
-	    tiler.scale = function(val) {
-	        if (!arguments.length) { return _scale; }
-	        _scale = val;
-	        return tiler;
-	    };
-
-
-	    tiler.translate = function(val) {
-	        if (!arguments.length) { return _translate; }
-	        _translate = val;
-	        return tiler;
-	    };
-
-
-	    // number to extend the rows/columns beyond those covering the viewport
-	    tiler.margin = function(val) {
-	        if (!arguments.length) { return _margin; }
-	        _margin = +val;
-	        return tiler;
-	    };
-
-
-	    tiler.skipNullIsland = function(val) {
-	        if (!arguments.length) { return _skipNullIsland; }
-	        _skipNullIsland = val;
-	        return tiler;
-	    };
-
-
-	    return tiler;
-	}
-
-	function utilTriggerEvent(target, type) {
-	    target.each(function() {
-	        var evt = document.createEvent('HTMLEvents');
-	        evt.initEvent(type, true, true);
-	        this.dispatchEvent(evt);
-	    });
-	}
-
-	var _mainLocalizer = coreLocalizer(); // singleton
-	var _t = _mainLocalizer.t;
-
-	//
-	// coreLocalizer manages language and locale parameters including translated strings
-	//
-	function coreLocalizer() {
-
-	    var localizer = {};
-
-	    var _dataLanguages = {};
-
-	    // `localeData` is an object containing all _supported_ locale codes -> language info.
-	    // {
-	    // en: { rtl: false, languageNames: {…}, scriptNames: {…} },
-	    // de: { rtl: false, languageNames: {…}, scriptNames: {…} },
-	    // …
-	    // }
-	    var _dataLocales = {};
-
-	    // `localeStrings` is an object containing all _loaded_ locale codes -> string data.
-	    // {
-	    // en: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
-	    // de: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
-	    // …
-	    // }
-	    var _localeStrings = {};
-
-	    // the current locale parameters
-	    var _localeCode = 'en-US';
-	    var _languageCode = 'en';
-	    var _textDirection = 'ltr';
-	    var _usesMetric = false;
-	    var _languageNames = {};
-	    var _scriptNames = {};
-
-	    // getters for the current locale parameters
-	    localizer.localeCode = function () { return _localeCode; };
-	    localizer.languageCode = function () { return _languageCode; };
-	    localizer.textDirection = function () { return _textDirection; };
-	    localizer.usesMetric = function () { return _usesMetric; };
-	    localizer.languageNames = function () { return _languageNames; };
-	    localizer.scriptNames = function () { return _scriptNames; };
-
-
-	    // The client app may want to manually set the locale, regardless of the
-	    // settings provided by the browser
-	    var _preferredLocaleCodes = [];
-	    localizer.preferredLocaleCodes = function(codes) {
-	        if (!arguments.length) { return _preferredLocaleCodes; }
-	        if (typeof codes === 'string') {
-	            // be generous and accept delimited strings as input
-	            _preferredLocaleCodes = codes.split(/,|;| /gi).filter(Boolean);
-	        } else {
-	            _preferredLocaleCodes = codes;
-	        }
-	        return localizer;
-	    };
-
-
-	    var _loadPromise;
-
-	    localizer.ensureLoaded = function () {
-
-	        if (_loadPromise) { return _loadPromise; }
-
-	        return _loadPromise = Promise.all([
-	                // load the list of languages
-	                _mainFileFetcher.get('languages'),
-	                // load the list of supported locales
-	                _mainFileFetcher.get('locales')
-	            ])
-	            .then(function (results) {
-	                _dataLanguages = results[0];
-	                _dataLocales = results[1];
-	            })
-	            .then(function () {
-	                var requestedLocales = (_preferredLocaleCodes || [])
-	                    // list of locales preferred by the browser in priority order
-	                    .concat(utilDetect().browserLocales);
-	                _localeCode = bestSupportedLocale(requestedLocales);
-
-	                return Promise.all([
-	                    // always load the English locale strings as fallbacks
-	                    localizer.loadLocale('en'),
-	                    // load the preferred locale
-	                    localizer.loadLocale(_localeCode)
-	                ]);
-	            })
-	            .then(function () {
-	                updateForCurrentLocale();
-	            })
-	            .catch(function (err) { return console.error(err); });  // eslint-disable-line
-	    };
-
-	    // Returns the best locale from `locales` supported by iD, if any
-	    function bestSupportedLocale(locales) {
-	        var supportedLocales = _dataLocales;
-
-	        var loop = function ( i ) {
-	            var locale = locales[i];
-	            if (locale.includes('-')) { // full locale ('es-ES')
-
-	                if (supportedLocales[locale]) { return { v: locale }; }
-
-	                // If full locale not supported ('es-FAKE'), fallback to the base ('es')
-	                var langPart = locale.split('-')[0];
-	                if (supportedLocales[langPart]) { return { v: langPart }; }
-
-	            } else { // base locale ('es')
-
-	                // prefer a lower-priority full locale with this base ('es' < 'es-ES')
-	                var fullLocale = locales.find(function (locale2, index) {
-	                    return index > i &&
-	                        locale2 !== locale &&
-	                        locale2.split('-')[0] === locale &&
-	                        supportedLocales[locale2];
-	                });
-	                if (fullLocale) { return { v: fullLocale }; }
-
-	                if (supportedLocales[locale]) { return { v: locale }; }
-	            }
-	        };
-
-	        for (var i in locales) {
-	            var returned = loop( i );
-
-	            if ( returned ) return returned.v;
-	        }
-
-	        return null;
-	    }
-
-	    function updateForCurrentLocale() {
-	        if (!_localeCode) { return; }
-
-	        _languageCode = _localeCode.split('-')[0];
-
-	        var currentData = _dataLocales[_localeCode] || _dataLocales[_languageCode];
-
-	        var hash = utilStringQs(window.location.hash);
-
-	        if (hash.rtl === 'true') {
-	            _textDirection = 'rtl';
-	        } else if (hash.rtl === 'false') {
-	            _textDirection = 'ltr';
-	        }  else {
-	            _textDirection = currentData && currentData.rtl ? 'rtl' : 'ltr';
-	        }
-
-	        _languageNames = currentData && currentData.languageNames;
-	        _scriptNames = currentData && currentData.scriptNames;
-
-	        _usesMetric = _localeCode.slice(-3).toLowerCase() !== '-us';
-	    }
-
-
-	    /* Locales */
-	    // Returns a Promise to load the strings for the requested locale
-	    localizer.loadLocale = function (requested) {
-
-	        if (!_dataLocales) {
-	            return Promise.reject('loadLocale called before init');
-	        }
-
-	        var locale = requested;
-
-	        // US English is the default
-	        if (locale.toLowerCase() === 'en-us') { locale = 'en'; }
-
-	        if (!_dataLocales[locale]) {
-	            return Promise.reject(("Unsupported locale: " + requested));
-	        }
-
-	        if (_localeStrings[locale]) {    // already loaded
-	            return Promise.resolve(locale);
-	        }
-
-	        var fileMap = _mainFileFetcher.fileMap();
-	        var key = "locale_" + locale;
-	        fileMap[key] = "locales/" + locale + ".json";
-
-	        return _mainFileFetcher.get(key)
-	            .then(function (d) {
-	                _localeStrings[locale] = d[locale];
-	                return locale;
-	            });
-	    };
-
-	    /**
-	    * Given a string identifier, try to find that string in the current
-	    * language, and return it.  This function will be called recursively
-	    * with locale `en` if a string can not be found in the requested language.
-	    *
-	    * @param  {string}   s             string identifier
-	    * @param  {object?}  replacements  token replacements and default string
-	    * @param  {string?}  locale        locale to use (defaults to currentLocale)
-	    * @return {string?}  localized string
-	    */
-	    localizer.t = function(s, replacements, locale) {
-	        locale = locale || _localeCode;
-
-	        // US English is the default
-	        if (locale.toLowerCase() === 'en-us') { locale = 'en'; }
-
-	        var path = s
-	          .split('.')
-	          .map(function (s) { return s.replace(/<TX_DOT>/g, '.'); })
-	          .reverse();
-
-	        var result = _localeStrings[locale];
-
-	        while (result !== undefined && path.length) {
-	          result = result[path.pop()];
-	        }
-
-	        if (result !== undefined) {
-	          if (replacements) {
-	            for (var k in replacements) {
-	              var token = "{" + k + "}";
-	              var regex = new RegExp(token, 'g');
-	              result = result.replace(regex, replacements[k]);
-	            }
-	          }
-	          return result;
-	        }
-
-	        if (locale !== 'en') {
-	          return localizer.t(s, replacements, 'en');  // fallback - recurse with 'en'
-	        }
-
-	        if (replacements && 'default' in replacements) {
-	          return replacements.default;      // fallback - replacements.default
-	        }
-
-	        var missing = "Missing " + locale + " translation: " + s;
-	        if (typeof console !== 'undefined') { console.error(missing); }  // eslint-disable-line
-
-	        return missing;
-	    };
-
-	    localizer.languageName = function (code, options) {
-
-	        if (_languageNames[code]) {  // name in locale language
-	          // e.g. "German"
-	          return _languageNames[code];
-	        }
-
-	        // sometimes we only want the local name
-	        if (options && options.localOnly) { return null; }
-
-	        var langInfo = _dataLanguages[code];
-	        if (langInfo) {
-	          if (langInfo.nativeName) {  // name in native language
-	            // e.g. "Deutsch (de)"
-	            return localizer.t('translate.language_and_code', { language: langInfo.nativeName, code: code });
-
-	          } else if (langInfo.base && langInfo.script) {
-	            var base = langInfo.base;   // the code of the language this is based on
-
-	            if (_languageNames[base]) {   // base language name in locale language
-	              var scriptCode = langInfo.script;
-	              var script = _scriptNames[scriptCode] || scriptCode;
-	              // e.g. "Serbian (Cyrillic)"
-	              return localizer.t('translate.language_and_code', { language: _languageNames[base], code: script });
-
-	            } else if (_dataLanguages[base] && _dataLanguages[base].nativeName) {
-	              // e.g. "српски (sr-Cyrl)"
-	              return localizer.t('translate.language_and_code', { language: _dataLanguages[base].nativeName, code: code });
-	            }
-	          }
-	        }
-	        return code;  // if not found, use the code
-	    };
-
-	    return localizer;
-	}
-
-	//
-	// `presetCollection` is a wrapper around an `Array` of presets `collection`,
-	// and decorated with some extra methods for searching and matching geometry
-	//
-	function presetCollection(collection) {
-	  var MAXRESULTS = 50;
-	  var _this = {};
-	  var _memo = {};
-
-	  _this.collection = collection;
-
-	  _this.item = function (id) {
-	    if (_memo[id]) { return _memo[id]; }
-	    var found = _this.collection.find(function (d) { return d.id === id; });
-	    if (found) { _memo[id] = found; }
-	    return found;
-	  };
-
-	  _this.index = function (id) { return _this.collection.findIndex(function (d) { return d.id === id; }); };
-
-	  _this.matchGeometry = function (geometry) {
-	    return presetCollection(
-	      _this.collection.filter(function (d) { return d.matchGeometry(geometry); })
-	    );
-	  };
-
-	  _this.matchAllGeometry = function (geometries) {
-	    return presetCollection(
-	      _this.collection.filter(function (d) { return d && d.matchAllGeometry(geometries); })
-	    );
-	  };
-
-	  _this.matchAnyGeometry = function (geometries) {
-	    return presetCollection(
-	      _this.collection.filter(function (d) { return geometries.some(function (geom) { return d.matchGeometry(geom); }); })
-	    );
-	  };
-
-	  _this.fallback = function (geometry) {
-	    var id = geometry;
-	    if (id === 'vertex') { id = 'point'; }
-	    return _this.item(id);
-	  };
-
-	  _this.search = function (value, geometry, countryCode) {
-	    if (!value) { return _this; }
-
-	    value = value.toLowerCase().trim();
-
-	    // match at name beginning or just after a space (e.g. "office" -> match "Law Office")
-	    function leading(a) {
-	      var index = a.indexOf(value);
-	      return index === 0 || a[index - 1] === ' ';
-	    }
-
-	    // match at name beginning only
-	    function leadingStrict(a) {
-	      var index = a.indexOf(value);
-	      return index === 0;
-	    }
-
-	    function sortNames(a, b) {
-	      var aCompare = (a.suggestion ? a.originalName : a.name()).toLowerCase();
-	      var bCompare = (b.suggestion ? b.originalName : b.name()).toLowerCase();
-
-	      // priority if search string matches preset name exactly - #4325
-	      if (value === aCompare) { return -1; }
-	      if (value === bCompare) { return 1; }
-
-	      // priority for higher matchScore
-	      var i = b.originalScore - a.originalScore;
-	      if (i !== 0) { return i; }
-
-	      // priority if search string appears earlier in preset name
-	      i = aCompare.indexOf(value) - bCompare.indexOf(value);
-	      if (i !== 0) { return i; }
-
-	      // priority for shorter preset names
-	      return aCompare.length - bCompare.length;
-	    }
-
-	    var pool = _this.collection;
-	    if (countryCode) {
-	      pool = pool.filter(function (a) {
-	        if (a.countryCodes && a.countryCodes.indexOf(countryCode) === -1) { return false; }
-	        if (a.notCountryCodes && a.notCountryCodes.indexOf(countryCode) !== -1) { return false; }
-	        return true;
-	      });
-	    }
-	    var searchable = pool.filter(function (a) { return a.searchable !== false && a.suggestion !== true; });
-	    var suggestions = pool.filter(function (a) { return a.suggestion === true; });
-
-	    // matches value to preset.name
-	    var leading_name = searchable
-	      .filter(function (a) { return leading(a.name().toLowerCase()); })
-	      .sort(sortNames);
-
-	    // matches value to preset suggestion name (original name is unhyphenated)
-	    var leading_suggestions = suggestions
-	      .filter(function (a) { return leadingStrict(a.originalName.toLowerCase()); })
-	      .sort(sortNames);
-
-	    // matches value to preset.terms values
-	    var leading_terms = searchable
-	      .filter(function (a) { return (a.terms() || []).some(leading); });
-
-	    // matches value to preset.tags values
-	    var leading_tag_values = searchable
-	      .filter(function (a) { return Object.values(a.tags || {}).filter(function (val) { return val !== '*'; }).some(leading); });
-
-	    // finds close matches to value in preset.name
-	    var similar_name = searchable
-	      .map(function (a) { return ({ preset: a, dist: utilEditDistance(value, a.name()) }); })
-	      .filter(function (a) { return a.dist + Math.min(value.length - a.preset.name().length, 0) < 3; })
-	      .sort(function (a, b) { return a.dist - b.dist; })
-	      .map(function (a) { return a.preset; });
-
-	    // finds close matches to value to preset suggestion name (original name is unhyphenated)
-	    var similar_suggestions = suggestions
-	      .map(function (a) { return ({ preset: a, dist: utilEditDistance(value, a.originalName.toLowerCase()) }); })
-	      .filter(function (a) { return a.dist + Math.min(value.length - a.preset.originalName.length, 0) < 1; })
-	      .sort(function (a, b) { return a.dist - b.dist; })
-	      .map(function (a) { return a.preset; });
-
-	    // finds close matches to value in preset.terms
-	    var similar_terms = searchable
-	      .filter(function (a) {
-	        return (a.terms() || []).some(function (b) {
-	          return utilEditDistance(value, b) + Math.min(value.length - b.length, 0) < 3;
-	        });
-	      });
-
-	    var results = leading_name.concat(
-	      leading_suggestions,
-	      leading_terms,
-	      leading_tag_values,
-	      similar_name,
-	      similar_suggestions,
-	      similar_terms
-	    ).slice(0, MAXRESULTS - 1);
-
-	    if (geometry) {
-	      if (typeof geometry === 'string') {
-	        results.push(_this.fallback(geometry));
-	      } else {
-	        geometry.forEach(function (geom) { return results.push(_this.fallback(geom)); });
-	      }
-	    }
-
-	    return presetCollection(utilArrayUniq(results));
-	  };
-
-
-	  return _this;
-	}
-
-	//
-	// `presetCategory` builds a `presetCollection` of member presets,
-	// decorated with some extra methods for searching and matching geometry
-	//
-	function presetCategory(categoryID, category, all) {
-	  var _this = Object.assign({}, category);   // shallow copy
-
-	  _this.id = categoryID;
-
-	  _this.members = presetCollection(
-	    category.members.map(function (presetID) { return all.item(presetID); }).filter(Boolean)
-	  );
-
-	  _this.geometry = _this.members.collection
-	    .reduce(function (acc, preset) {
-	      for (var i in preset.geometry) {
-	        var geometry = preset.geometry[i];
-	        if (acc.indexOf(geometry) === -1) {
-	          acc.push(geometry);
-	        }
-	      }
-	      return acc;
-	    }, []);
-
-	  _this.matchGeometry = function (geom) { return _this.geometry.indexOf(geom) >= 0; };
-
-	  _this.matchAllGeometry = function (geometries) { return _this.members.collection
-	    .some(function (preset) { return preset.matchAllGeometry(geometries); }); };
-
-	  _this.matchScore = function () { return -1; };
-
-	  _this.name = function () { return _t(("presets.categories." + categoryID + ".name"), { 'default': categoryID }); };
-
-	  _this.terms = function () { return []; };
-
-
-	  return _this;
-	}
-
-	//
-	// `presetField` decorates a given `field` Object
-	// with some extra methods for searching and matching geometry
-	//
-	function presetField(fieldID, field) {
-	  var _this = Object.assign({}, field);   // shallow copy
-
-	  _this.id = fieldID;
-
-	  // for use in classes, element ids, css selectors
-	  _this.safeid = utilSafeClassName(fieldID);
-
-	  _this.matchGeometry = function (geom) { return !_this.geometry || _this.geometry.indexOf(geom) !== -1; };
-
-	  _this.matchAllGeometry = function (geometries) {
-	    return !_this.geometry || geometries.every(function (geom) { return _this.geometry.indexOf(geom) !== -1; });
-	  };
-
-	  _this.t = function (scope, options) { return _t(("presets.fields." + fieldID + "." + scope), options); };
-
-	  _this.label = function () { return _this.overrideLabel || _this.t('label', { 'default': fieldID }); };
-
-	  var _placeholder = _this.placeholder;
-	  _this.placeholder = function () { return _this.t('placeholder', { 'default': _placeholder }); };
-
-	  _this.originalTerms = (_this.terms || []).join();
-
-	  _this.terms = function () { return _this.t('terms', { 'default': _this.originalTerms })
-	    .toLowerCase().trim().split(/\s*,+\s*/); };
-
-
-	  return _this;
-	}
-
-	//
-	// `presetPreset` decorates a given `preset` Object
-	// with some extra methods for searching and matching geometry
-	//
-	function presetPreset(presetID, preset, addable, allFields, allPresets) {
-	  allFields = allFields || {};
-	  allPresets = allPresets || {};
-	  var _this = Object.assign({}, preset);   // shallow copy
-	  var _addable = addable || false;
-	  var _resolvedFields;      // cache
-	  var _resolvedMoreFields;  // cache
-
-	  _this.id = presetID;
-
-	  _this.safeid = utilSafeClassName(presetID);  // for use in css classes, selectors, element ids
-
-	  _this.originalTerms = (_this.terms || []).join();
-
-	  _this.originalName = _this.name || '';
-
-	  _this.originalScore = _this.matchScore || 1;
-
-	  _this.originalReference = _this.reference || {};
-
-	  _this.originalFields = (_this.fields || []);
-
-	  _this.originalMoreFields = (_this.moreFields || []);
-
-	  _this.fields = function () { return _resolvedFields || (_resolvedFields = resolve('fields')); };
-
-	  _this.moreFields = function () { return _resolvedMoreFields || (_resolvedMoreFields = resolve('moreFields')); };
-
-	  _this.resetFields = function () { return _resolvedFields = _resolvedMoreFields = null; };
-
-	  _this.tags = _this.tags || {};
-
-	  _this.addTags = _this.addTags || _this.tags;
-
-	  _this.removeTags = _this.removeTags || _this.addTags;
-
-	  _this.geometry = (_this.geometry || []);
-
-	  _this.matchGeometry = function (geom) { return _this.geometry.indexOf(geom) >= 0; };
-
-	  _this.matchAllGeometry = function (geoms) { return geoms.every(_this.matchGeometry); };
-
-	  _this.matchScore = function (entityTags) {
-	    var tags = _this.tags;
-	    var seen = {};
-	    var score = 0;
-
-	    // match on tags
-	    for (var k in tags) {
-	      seen[k] = true;
-	      if (entityTags[k] === tags[k]) {
-	        score += _this.originalScore;
-	      } else if (tags[k] === '*' && k in entityTags) {
-	        score += _this.originalScore / 2;
-	      } else {
-	        return -1;
-	      }
-	    }
-
-	    // boost score for additional matches in addTags - #6802
-	    var addTags = _this.addTags;
-	    for (var k$1 in addTags) {
-	      if (!seen[k$1] && entityTags[k$1] === addTags[k$1]) {
-	        score += _this.originalScore;
-	      }
-	    }
-
-	    return score;
-	  };
-
-
-	  var _textCache = {};
-	  _this.t = function (scope, options) {
-	    var textID = "presets.presets." + presetID + "." + scope;
-	    if (_textCache[textID]) { return _textCache[textID]; }
-	    return _textCache[textID] = _t(textID, options);
-	  };
-
-
-	  _this.name = function () {
-	    if (_this.suggestion) {
-	      var path = presetID.split('/');
-	      path.pop();  // remove brand name
-	      // NOTE: insert an en-dash, not a hyphen (to avoid conflict with fr - nl names in Brussels etc)
-	      return _this.originalName + ' – ' + _t('presets.presets.' + path.join('/') + '.name');
-	    }
-	    return _this.t('name', { 'default': _this.originalName });
-	  };
-
-
-	  _this.terms = function () { return _this.t('terms', { 'default': _this.originalTerms })
-	    .toLowerCase().trim().split(/\s*,+\s*/); };
-
-
-	  _this.isFallback = function () {
-	    var tagCount = Object.keys(_this.tags).length;
-	    return tagCount === 0 || (tagCount === 1 && _this.tags.hasOwnProperty('area'));
-	  };
-
-
-	  _this.addable = function(val) {
-	    if (!arguments.length) { return _addable; }
-	    _addable = val;
-	    return _this;
-	  };
-
-
-	  _this.reference = function () {
-	    // Lookup documentation on Wikidata...
-	    var qid = _this.tags.wikidata || _this.tags['brand:wikidata'] || _this.tags['operator:wikidata'];
-	    if (qid) {
-	      return { qid: qid };
-	    }
-
-	    // Lookup documentation on OSM Wikibase...
-	    var key = _this.originalReference.key || Object.keys(utilObjectOmit(_this.tags, 'name'))[0];
-	    var value = _this.originalReference.value || _this.tags[key];
-
-	    if (value === '*') {
-	      return { key: key };
-	    } else {
-	      return { key: key, value: value };
-	    }
-	  };
-
-
-	  _this.unsetTags = function (tags, geometry, skipFieldDefaults) {
-	    tags = utilObjectOmit(tags, Object.keys(_this.removeTags));
-
-	    if (geometry && !skipFieldDefaults) {
-	      _this.fields().forEach(function (field) {
-	        if (field.matchGeometry(geometry) && field.key && field.default === tags[field.key]) {
-	          delete tags[field.key];
-	        }
-	      });
-	    }
-
-	    delete tags.area;
-	    return tags;
-	  };
-
-
-	  _this.setTags = function (tags, geometry, skipFieldDefaults) {
-	    var addTags = _this.addTags;
-	    tags = Object.assign({}, tags);   // shallow copy
-
-	    for (var k in addTags) {
-	      if (addTags[k] === '*') {
-	        tags[k] = 'yes';
-	      } else {
-	        tags[k] = addTags[k];
-	      }
-	    }
-
-	    // Add area=yes if necessary.
-	    // This is necessary if the geometry is already an area (e.g. user drew an area) AND any of:
-	    // 1. chosen preset could be either an area or a line (`barrier=city_wall`)
-	    // 2. chosen preset doesn't have a key in osmAreaKeys (`railway=station`)
-	    if (!addTags.hasOwnProperty('area')) {
-	      delete tags.area;
-	      if (geometry === 'area') {
-	        var needsAreaTag = true;
-	        if (_this.geometry.indexOf('line') === -1) {
-	          for (var k$1 in addTags) {
-	            if (k$1 in osmAreaKeys) {
-	              needsAreaTag = false;
-	              break;
-	            }
-	          }
-	        }
-	        if (needsAreaTag) {
-	          tags.area = 'yes';
-	        }
-	      }
-	    }
-
-	    if (geometry && !skipFieldDefaults) {
-	      _this.fields().forEach(function (field) {
-	        if (field.matchGeometry(geometry) && field.key && !tags[field.key] && field.default) {
-	          tags[field.key] = field.default;
-	        }
-	      });
-	    }
-
-	    return tags;
-	  };
-
-
-	  // For a preset without fields, use the fields of the parent preset.
-	  // Replace {preset} placeholders with the fields of the specified presets.
-	  function resolve(which) {
-	    var fieldIDs = (which === 'fields' ? _this.originalFields : _this.originalMoreFields);
-	    var resolved = [];
-
-	    fieldIDs.forEach(function (fieldID) {
-	      var match = fieldID.match(/\{(.*)\}/);
-	      if (match !== null) {    // a presetID wrapped in braces {}
-	        resolved = resolved.concat(inheritFields(match[1], which));
-	      } else if (allFields[fieldID]) {    // a normal fieldID
-	        resolved.push(allFields[fieldID]);
-	      } else {
-	        console.log(("Cannot resolve \"" + fieldID + "\" found in " + (_this.id) + "." + which));  // eslint-disable-line no-console
-	      }
-	    });
-
-	    // no fields resolved, so use the parent's if possible
-	    if (!resolved.length) {
-	      var endIndex = _this.id.lastIndexOf('/');
-	      var parentID = endIndex && _this.id.substring(0, endIndex);
-	      if (parentID) {
-	        resolved = inheritFields(parentID, which);
-	      }
-	    }
-
-	    return utilArrayUniq(resolved);
-
-
-	    // returns an array of fields to inherit from the given presetID, if found
-	    function inheritFields(presetID, which) {
-	      var parent = allPresets[presetID];
-	      if (!parent) { return []; }
-
-	      if (which === 'fields') {
-	        return parent.fields().filter(shouldInherit);
-	      } else if (which === 'moreFields') {
-	        return parent.moreFields();
-	      } else {
-	        return [];
-	      }
-	    }
-
-
-	    // Skip `fields` for the keys which define the preset.
-	    // These are usually `typeCombo` fields like `shop=*`
-	    function shouldInherit(f) {
-	      if (f.key && _this.tags[f.key] !== undefined &&
-	        // inherit anyway if multiple values are allowed or just a checkbox
-	        f.type !== 'multiCombo' && f.type !== 'semiCombo' && f.type !== 'check'
-	      ) { return false; }
-
-	      return true;
-	    }
-	  }
-
-
-	  return _this;
-	}
-
-	var _mainPresetIndex = presetIndex(); // singleton
-
-	//
-	// `presetIndex` wraps a `presetCollection`
-	// with methods for loading new data and returning defaults
-	//
-	function presetIndex() {
-	  var dispatch$1 = dispatch('favoritePreset', 'recentsChange');
-	  var MAXRECENTS = 30;
-
-	  // seed the preset lists with geometry fallbacks
-	  var POINT = presetPreset('point', { name: 'Point', tags: {}, geometry: ['point', 'vertex'], matchScore: 0.1 } );
-	  var LINE = presetPreset('line', { name: 'Line', tags: {}, geometry: ['line'], matchScore: 0.1 } );
-	  var AREA = presetPreset('area', { name: 'Area', tags: { area: 'yes' }, geometry: ['area'], matchScore: 0.1 } );
-	  var RELATION = presetPreset('relation', { name: 'Relation', tags: {}, geometry: ['relation'], matchScore: 0.1 } );
-
-	  var _this = presetCollection([POINT, LINE, AREA, RELATION]);
-	  var _presets = { point: POINT, line: LINE, area: AREA, relation: RELATION };
-
-	  var _defaults = {
-	    point: presetCollection([POINT]),
-	    vertex: presetCollection([POINT]),
-	    line: presetCollection([LINE]),
-	    area: presetCollection([AREA]),
-	    relation: presetCollection([RELATION])
-	  };
-
-	  var _fields = {};
-	  var _categories = {};
-	  var _universal = [];
-	  var _addablePresetIDs = null;   // Set of preset IDs that the user can add
-	  var _recents;
-	  var _favorites;
-
-	  // Index of presets by (geometry, tag key).
-	  var _geometryIndex = { point: {}, vertex: {}, line: {}, area: {}, relation: {} };
-
-	  var _loadPromise;
-
-	  _this.ensureLoaded = function () {
-	    if (_loadPromise) { return _loadPromise; }
-
-	    return _loadPromise = Promise.all([
-	        _mainFileFetcher.get('preset_categories'),
-	        _mainFileFetcher.get('preset_defaults'),
-	        _mainFileFetcher.get('preset_presets'),
-	        _mainFileFetcher.get('preset_fields')
-	      ])
-	      .then(function (vals) {
-	        _this.merge({
-	          categories: vals[0],
-	          defaults: vals[1],
-	          presets: vals[2],
-	          fields: vals[3]
-	        });
-	        osmSetAreaKeys(_this.areaKeys());
-	        osmSetPointTags(_this.pointTags());
-	        osmSetVertexTags(_this.vertexTags());
-	      });
-	  };
-
-
-	  _this.merge = function (d) {
-	    // Merge Fields
-	    if (d.fields) {
-	      Object.keys(d.fields).forEach(function (fieldID) {
-	        var f = d.fields[fieldID];
-	        if (f) {   // add or replace
-	          _fields[fieldID] = presetField(fieldID, f);
-	        } else {   // remove
-	          delete _fields[fieldID];
-	        }
-	      });
-	    }
-
-	    // Merge Presets
-	    if (d.presets) {
-	      Object.keys(d.presets).forEach(function (presetID) {
-	        var p = d.presets[presetID];
-	        if (p) {   // add or replace
-	          var isAddable = !_addablePresetIDs || _addablePresetIDs.has(presetID);
-	          _presets[presetID] = presetPreset(presetID, p, isAddable, _fields, _presets);
-	        } else {   // remove (but not if it's a fallback)
-	          var existing = _presets[presetID];
-	          if (existing && !existing.isFallback()) {
-	            delete _presets[presetID];
-	          }
-	        }
-	      });
-	    }
-
-	    // Need to rebuild _this.collection before loading categories
-	    _this.collection = Object.values(_presets).concat(Object.values(_categories));
-
-	    // Merge Categories
-	    if (d.categories) {
-	      Object.keys(d.categories).forEach(function (categoryID) {
-	        var c = d.categories[categoryID];
-	        if (c) {   // add or replace
-	          _categories[categoryID] = presetCategory(categoryID, c, _this);
-	        } else {   // remove
-	          delete _categories[categoryID];
-	        }
-	      });
-	    }
-
-	    // Rebuild _this.collection after loading categories
-	    _this.collection = Object.values(_presets).concat(Object.values(_categories));
-
-	    // Merge Defaults
-	    if (d.defaults) {
-	      Object.keys(d.defaults).forEach(function (geometry) {
-	        var def = d.defaults[geometry];
-	        if (Array.isArray(def)) {   // add or replace
-	          _defaults[geometry] = presetCollection(
-	            def.map(function (id) { return _presets[id] || _categories[id]; }).filter(Boolean)
-	          );
-	        } else {   // remove
-	          delete _defaults[geometry];
-	        }
-	      });
-	    }
-
-	    // Rebuild universal fields array
-	    _universal = Object.values(_fields).filter(function (field) { return field.universal; });
-
-	    // Reset all the preset fields - they'll need to be resolved again
-	    Object.values(_presets).forEach(function (preset) { return preset.resetFields(); });
-
-	    // Rebuild geometry index
-	    _geometryIndex = { point: {}, vertex: {}, line: {}, area: {}, relation: {} };
-	    _this.collection.forEach(function (preset) {
-	      (preset.geometry || []).forEach(function (geometry) {
-	        var g = _geometryIndex[geometry];
-	        for (var key in preset.tags) {
-	          (g[key] = g[key] || []).push(preset);
-	        }
-	      });
-	    });
-
-	    return _this;
-	  };
-
-
-	  _this.match = function (entity, resolver) {
-	    return resolver.transient(entity, 'presetMatch', function () {
-	      var geometry = entity.geometry(resolver);
-	      // Treat entities on addr:interpolation lines as points, not vertices - #3241
-	      if (geometry === 'vertex' && entity.isOnAddressLine(resolver)) {
-	        geometry = 'point';
-	      }
-	      return _this.matchTags(entity.tags, geometry);
-	    });
-	  };
-
-
-	  _this.matchTags = function (tags, geometry) {
-	    var geometryMatches = _geometryIndex[geometry];
-	    var address;
-	    var best = -1;
-	    var match;
-
-	    for (var k in tags) {
-	      // If any part of an address is present, allow fallback to "Address" preset - #4353
-	      if (/^addr:/.test(k) && geometryMatches['addr:*']) {
-	        address = geometryMatches['addr:*'][0];
-	      }
-
-	      var keyMatches = geometryMatches[k];
-	      if (!keyMatches) { continue; }
-
-	      for (var i = 0; i < keyMatches.length; i++) {
-	        var score = keyMatches[i].matchScore(tags);
-	        if (score > best) {
-	          best = score;
-	          match = keyMatches[i];
-	        }
-	      }
-	    }
-
-	    if (address && (!match || match.isFallback())) {
-	      match = address;
-	    }
-	    return match || _this.fallback(geometry);
-	  };
-
-
-	  _this.allowsVertex = function (entity, resolver) {
-	    if (entity.type !== 'node') { return false; }
-	    if (Object.keys(entity.tags).length === 0) { return true; }
-
-	    return resolver.transient(entity, 'vertexMatch', function () {
-	      // address lines allow vertices to act as standalone points
-	      if (entity.isOnAddressLine(resolver)) { return true; }
-
-	      var geometries = osmNodeGeometriesForTags(entity.tags);
-	      if (geometries.vertex) { return true; }
-	      if (geometries.point) { return false; }
-	      // allow vertices for unspecified points
-	      return true;
-	    });
-	  };
-
-
-	  // Because of the open nature of tagging, iD will never have a complete
-	  // list of tags used in OSM, so we want it to have logic like "assume
-	  // that a closed way with an amenity tag is an area, unless the amenity
-	  // is one of these specific types". This function computes a structure
-	  // that allows testing of such conditions, based on the presets designated
-	  // as as supporting (or not supporting) the area geometry.
-	  //
-	  // The returned object L is a keeplist/discardlist of tags. A closed way
-	  // with a tag (k, v) is considered to be an area if `k in L && !(v in L[k])`
-	  // (see `Way#isArea()`). In other words, the keys of L form the keeplist,
-	  // and the subkeys form the discardlist.
-	  _this.areaKeys = function () {
-	    // The ignore list is for keys that imply lines. (We always add `area=yes` for exceptions)
-	    var ignore = ['barrier', 'highway', 'footway', 'railway', 'junction', 'type'];
-	    var areaKeys = {};
-
-	    // ignore name-suggestion-index and deprecated presets
-	    var presets = _this.collection.filter(function (p) { return !p.suggestion && !p.replacement; });
-
-	    // keeplist
-	    presets.forEach(function (p) {
-	      var key;
-	      for (key in p.tags) { break; }  // pick the first tag
-	      if (!key) { return; }
-	      if (ignore.indexOf(key) !== -1) { return; }
-
-	      if (p.geometry.indexOf('area') !== -1) {    // probably an area..
-	        areaKeys[key] = areaKeys[key] || {};
-	      }
-	    });
-
-	    // discardlist
-	    presets.forEach(function (p) {
-	      var key;
-	      for (key in p.addTags) {
-	        // examine all addTags to get a better sense of what can be tagged on lines - #6800
-	        var value = p.addTags[key];
-	        if (key in areaKeys &&                    // probably an area...
-	          p.geometry.indexOf('line') !== -1 &&    // but sometimes a line
-	          value !== '*') {
-	          areaKeys[key][value] = true;
-	        }
-	      }
-	    });
-
-	    return areaKeys;
-	  };
-
-
-	  _this.pointTags = function () {
-	    return _this.collection.reduce(function (pointTags, d) {
-	      // ignore name-suggestion-index, deprecated, and generic presets
-	      if (d.suggestion || d.replacement || d.searchable === false) { return pointTags; }
-
-	      // only care about the primary tag
-	      var key;
-	      for (key in d.tags) { break; }  // pick the first tag
-	      if (!key) { return pointTags; }
-
-	      // if this can be a point
-	      if (d.geometry.indexOf('point') !== -1) {
-	        pointTags[key] = pointTags[key] || {};
-	        pointTags[key][d.tags[key]] = true;
-	      }
-	      return pointTags;
-	    }, {});
-	  };
-
-
-	  _this.vertexTags = function () {
-	    return _this.collection.reduce(function (vertexTags, d) {
-	      // ignore name-suggestion-index, deprecated, and generic presets
-	      if (d.suggestion || d.replacement || d.searchable === false) { return vertexTags; }
-
-	      // only care about the primary tag
-	      var key;
-	      for (key in d.tags) { break; }   // pick the first tag
-	      if (!key) { return vertexTags; }
-
-	      // if this can be a vertex
-	      if (d.geometry.indexOf('vertex') !== -1) {
-	        vertexTags[key] = vertexTags[key] || {};
-	        vertexTags[key][d.tags[key]] = true;
-	      }
-	      return vertexTags;
-	    }, {});
-	  };
-
-
-	  _this.field = function (id) { return _fields[id]; };
-
-	  _this.universal = function () { return _universal; };
-
-
-	  _this.defaults = function (geometry, n, startWithRecents) {
-	    var recents = [];
-	    if (startWithRecents) {
-	      recents = _this.recent().matchGeometry(geometry).collection.slice(0, 4);
-	    }
-	    var defaults;
-	    if (_addablePresetIDs) {
-	      defaults = Array.from(_addablePresetIDs).map(function(id) {
-	        var preset = _this.item(id);
-	        if (preset && preset.matchGeometry(geometry)) { return preset; }
-	        return null;
-	      }).filter(Boolean);
-	    } else {
-	      defaults = _defaults[geometry].collection.concat(_this.fallback(geometry));
-	    }
-
-	    return presetCollection(
-	      utilArrayUniq(recents.concat(defaults)).slice(0, n - 1)
-	    );
-	  };
-
-	  // pass a Set of addable preset ids
-	  _this.addablePresetIDs = function(val) {
-	    if (!arguments.length) { return _addablePresetIDs; }
-
-	    // accept and convert arrays
-	    if (Array.isArray(val)) { val = new Set(val); }
-
-	    _addablePresetIDs = val;
-	    if (_addablePresetIDs) {   // reset all presets
-	      _this.collection.forEach(function (p) {
-	        // categories aren't addable
-	        if (p.addable) { p.addable(_addablePresetIDs.has(p.id)); }
-	      });
-	    } else {
-	      _this.collection.forEach(function (p) {
-	        if (p.addable) { p.addable(true); }
-	      });
-	    }
-
-	    return _this;
-	  };
-
-
-	  _this.recent = function () {
-	    return presetCollection(
-	      utilArrayUniq(_this.getRecents().map(function (d) { return d.preset; }))
-	    );
-	  };
-
-
-	  function RibbonItem(preset, source) {
-	    var item = {};
-	    item.preset = preset;
-	    item.source = source;
-
-	    item.isFavorite = function () { return item.source === 'favorite'; };
-	    item.isRecent = function () { return item.source === 'recent'; };
-	    item.matches = function (preset) { return item.preset.id === preset.id; };
-	    item.minified = function () { return ({ pID: item.preset.id }); };
-
-	    return item;
-	  }
-
-
-	  function ribbonItemForMinified(d, source) {
-	    if (d && d.pID) {
-	      var preset = _this.item(d.pID);
-	      if (!preset) { return null; }
-	      return RibbonItem(preset, source);
-	    }
-	    return null;
-	  }
-
-
-	  _this.getGenericRibbonItems = function () {
-	    return ['point', 'line', 'area'].map(function (id) { return RibbonItem(_this.item(id), 'generic'); });
-	  };
-
-
-	  _this.getAddable = function () {
-	      if (!_addablePresetIDs) { return []; }
-
-	      return _addablePresetIDs.map(function (id) {
-	        var preset = _this.item(id);
-	        if (preset) {
-	          return RibbonItem(preset, 'addable');
-	        }
-	      }).filter(Boolean);
-	  };
-
-
-	  function setRecents(items) {
-	    _recents = items;
-	    var minifiedItems = items.map(function (d) { return d.minified(); });
-	    corePreferences('preset_recents', JSON.stringify(minifiedItems));
-	    dispatch$1.call('recentsChange');
-	  }
-
-
-	  _this.getRecents = function () {
-	    if (!_recents) {
-	      // fetch from local storage
-	      _recents = (JSON.parse(corePreferences('preset_recents')) || [])
-	        .reduce(function (acc, d) {
-	          var item = ribbonItemForMinified(d, 'recent');
-	          if (item && item.preset.addable()) { acc.push(item); }
-	          return acc;
-	        }, []);
-	    }
-	    return _recents;
-	  };
-
-
-	  _this.addRecent = function (preset, besidePreset, after) {
-	    var recents = _this.getRecents();
-
-	    var beforeItem = _this.recentMatching(besidePreset);
-	    var toIndex = recents.indexOf(beforeItem);
-	    if (after) { toIndex += 1; }
-
-	    var newItem = RibbonItem(preset, 'recent');
-	    recents.splice(toIndex, 0, newItem);
-	    setRecents(recents);
-	  };
-
-
-	  _this.removeRecent = function (preset) {
-	    var item = _this.recentMatching(preset);
-	    if (item) {
-	      var items = _this.getRecents();
-	      items.splice(items.indexOf(item), 1);
-	      setRecents(items);
-	    }
-	  };
-
-
-	  _this.recentMatching = function (preset) {
-	    var items = _this.getRecents();
-	    for (var i in items) {
-	      if (items[i].matches(preset)) {
-	        return items[i];
-	      }
-	    }
-	    return null;
-	  };
-
-
-	  _this.moveItem = function (items, fromIndex, toIndex) {
-	    if (fromIndex === toIndex ||
-	      fromIndex < 0 || toIndex < 0 ||
-	      fromIndex >= items.length || toIndex >= items.length
-	    ) { return null; }
-
-	    items.splice(toIndex, 0, items.splice(fromIndex, 1)[0]);
-	    return items;
-	  };
-
-
-	  _this.moveRecent = function (item, beforeItem) {
-	    var recents = _this.getRecents();
-	    var fromIndex = recents.indexOf(item);
-	    var toIndex = recents.indexOf(beforeItem);
-	    var items = _this.moveItem(recents, fromIndex, toIndex);
-	    if (items) { setRecents(items); }
-	  };
-
-
-	  _this.setMostRecent = function (preset) {
-	    if (preset.searchable === false) { return; }
-
-	    var items = _this.getRecents();
-	    var item = _this.recentMatching(preset);
-	    if (item) {
-	      items.splice(items.indexOf(item), 1);
-	    } else {
-	      item = RibbonItem(preset, 'recent');
-	    }
-
-	    // remove the last recent (first in, first out)
-	    while (items.length >= MAXRECENTS) {
-	      items.pop();
-	    }
-
-	    // prepend array
-	    items.unshift(item);
-	    setRecents(items);
-	  };
-
-	  function setFavorites(items) {
-	    _favorites = items;
-	    var minifiedItems = items.map(function (d) { return d.minified(); });
-	    corePreferences('preset_favorites', JSON.stringify(minifiedItems));
-
-	    // call update
-	    dispatch$1.call('favoritePreset');
-	  }
-
-	  _this.addFavorite = function (preset, besidePreset, after) {
-	      var favorites = _this.getFavorites();
-
-	      var beforeItem = _this.favoriteMatching(besidePreset);
-	      var toIndex = favorites.indexOf(beforeItem);
-	      if (after) { toIndex += 1; }
-
-	      var newItem = RibbonItem(preset, 'favorite');
-	      favorites.splice(toIndex, 0, newItem);
-	      setFavorites(favorites);
-	  };
-
-	  _this.toggleFavorite = function (preset) {
-	    var favs = _this.getFavorites();
-	    var favorite = _this.favoriteMatching(preset);
-	    if (favorite) {
-	      favs.splice(favs.indexOf(favorite), 1);
-	    } else {
-	      // only allow 10 favorites
-	      if (favs.length === 10) {
-	          // remove the last favorite (last in, first out)
-	          favs.pop();
-	      }
-	      // append array
-	      favs.push(RibbonItem(preset, 'favorite'));
-	    }
-	    setFavorites(favs);
-	  };
-
-
-	  _this.removeFavorite = function (preset) {
-	    var item = _this.favoriteMatching(preset);
-	    if (item) {
-	      var items = _this.getFavorites();
-	      items.splice(items.indexOf(item), 1);
-	      setFavorites(items);
-	    }
-	  };
-
-
-	  _this.getFavorites = function () {
-	    if (!_favorites) {
-
-	      // fetch from local storage
-	      var rawFavorites = JSON.parse(corePreferences('preset_favorites'));
-
-	      if (!rawFavorites) {
-	        rawFavorites = [];
-	        corePreferences('preset_favorites', JSON.stringify(rawFavorites));
-	      }
-
-	      _favorites = rawFavorites.reduce(function (output, d) {
-	        var item = ribbonItemForMinified(d, 'favorite');
-	        if (item && item.preset.addable()) { output.push(item); }
-	        return output;
-	      }, []);
-	    }
-	    return _favorites;
-	  };
-
-
-	  _this.favoriteMatching = function (preset) {
-	    var favs = _this.getFavorites();
-	    for (var index in favs) {
-	      if (favs[index].matches(preset)) {
-	        return favs[index];
-	      }
-	    }
-	    return null;
-	  };
-
-
-	  return utilRebind(_this, dispatch$1, 'on');
-	}
-
-	function utilTagText(entity) {
-	    var obj = (entity && entity.tags) || {};
-	    return Object.keys(obj)
-	        .map(function(k) { return k + '=' + obj[k]; })
-	        .join(', ');
-	}
-
-
-	function utilTotalExtent(array, graph) {
-	    var extent = geoExtent();
-	    var val, entity;
-	    for (var i = 0; i < array.length; i++) {
-	        val = array[i];
-	        entity = typeof val === 'string' ? graph.hasEntity(val) : val;
-	        if (entity) {
-	            extent._extend(entity.extent(graph));
-	        }
-	    }
-	    return extent;
-	}
-
-
-	function utilTagDiff(oldTags, newTags) {
-	    var tagDiff = [];
-	    var keys = utilArrayUnion(Object.keys(oldTags), Object.keys(newTags)).sort();
-	    keys.forEach(function(k) {
-	        var oldVal = oldTags[k];
-	        var newVal = newTags[k];
-
-	        if ((oldVal || oldVal === '') && (newVal === undefined || newVal !== oldVal)) {
-	            tagDiff.push({
-	                type: '-',
-	                key: k,
-	                oldVal: oldVal,
-	                newVal: newVal,
-	                display: '- ' + k + '=' + oldVal
-	            });
-	        }
-	        if ((newVal || newVal === '') && (oldVal === undefined || newVal !== oldVal)) {
-	            tagDiff.push({
-	                type: '+',
-	                key: k,
-	                oldVal: oldVal,
-	                newVal: newVal,
-	                display: '+ ' + k + '=' + newVal
-	            });
-	        }
-	    });
-	    return tagDiff;
-	}
-
-
-	function utilEntitySelector(ids) {
-	    return ids.length ? '.' + ids.join(',.') : 'nothing';
-	}
-
-
-	// returns an selector to select entity ids for:
-	//  - entityIDs passed in
-	//  - shallow descendant entityIDs for any of those entities that are relations
-	function utilEntityOrMemberSelector(ids, graph) {
-	    var seen = new Set(ids);
-	    ids.forEach(collectShallowDescendants);
-	    return utilEntitySelector(Array.from(seen));
-
-	    function collectShallowDescendants(id) {
-	        var entity = graph.hasEntity(id);
-	        if (!entity || entity.type !== 'relation') { return; }
-
-	        entity.members
-	            .map(function(member) { return member.id; })
-	            .forEach(function(id) { seen.add(id); });
-	    }
-	}
-
-
-	// returns an selector to select entity ids for:
-	//  - entityIDs passed in
-	//  - deep descendant entityIDs for any of those entities that are relations
-	function utilEntityOrDeepMemberSelector(ids, graph) {
-	    return utilEntitySelector(utilEntityAndDeepMemberIDs(ids, graph));
-	}
-
-
-	// returns an selector to select entity ids for:
-	//  - entityIDs passed in
-	//  - deep descendant entityIDs for any of those entities that are relations
-	function utilEntityAndDeepMemberIDs(ids, graph) {
-	    var seen = new Set();
-	    ids.forEach(collectDeepDescendants);
-	    return Array.from(seen);
-
-	    function collectDeepDescendants(id) {
-	        if (seen.has(id)) { return; }
-	        seen.add(id);
-
-	        var entity = graph.hasEntity(id);
-	        if (!entity || entity.type !== 'relation') { return; }
-
-	        entity.members
-	            .map(function(member) { return member.id; })
-	            .forEach(collectDeepDescendants);   // recurse
-	    }
-	}
-
-	// returns an selector to select entity ids for:
-	//  - deep descendant entityIDs for any of those entities that are relations
-	function utilDeepMemberSelector(ids, graph, skipMultipolgonMembers) {
-	    var idsSet = new Set(ids);
-	    var seen = new Set();
-	    var returners = new Set();
-	    ids.forEach(collectDeepDescendants);
-	    return utilEntitySelector(Array.from(returners));
-
-	    function collectDeepDescendants(id) {
-	        if (seen.has(id)) { return; }
-	        seen.add(id);
-
-	        if (!idsSet.has(id)) {
-	            returners.add(id);
-	        }
-
-	        var entity = graph.hasEntity(id);
-	        if (!entity || entity.type !== 'relation') { return; }
-	        if (skipMultipolgonMembers && entity.isMultipolygon()) { return; }
-	        entity.members
-	            .map(function(member) { return member.id; })
-	            .forEach(collectDeepDescendants);   // recurse
-	    }
-	}
-
-
-	// Adds or removes highlight styling for the specified entities
-	function utilHighlightEntities(ids, highlighted, context) {
-	    context.surface()
-	        .selectAll(utilEntityOrDeepMemberSelector(ids, context.graph()))
-	        .classed('highlighted', highlighted);
-	}
-
-
-	// returns an Array that is the union of:
-	//  - nodes for any nodeIDs passed in
-	//  - child nodes of any wayIDs passed in
-	//  - descendant member and child nodes of relationIDs passed in
-	function utilGetAllNodes(ids, graph) {
-	    var seen = new Set();
-	    var nodes = new Set();
-
-	    ids.forEach(collectNodes);
-	    return Array.from(nodes);
-
-	    function collectNodes(id) {
-	        if (seen.has(id)) { return; }
-	        seen.add(id);
-
-	        var entity = graph.hasEntity(id);
-	        if (!entity) { return; }
-
-	        if (entity.type === 'node') {
-	            nodes.add(entity);
-	        } else if (entity.type === 'way') {
-	            entity.nodes.forEach(collectNodes);
-	        } else {
-	            entity.members
-	                .map(function(member) { return member.id; })
-	                .forEach(collectNodes);   // recurse
-	        }
-	    }
-	}
-
-
-	function utilDisplayName(entity) {
-	    var localizedNameKey = 'name:' + _mainLocalizer.languageCode().toLowerCase();
-	    var name = entity.tags[localizedNameKey] || entity.tags.name || '';
-	    var network = entity.tags.cycle_network || entity.tags.network;
-
-	    if (!name && entity.tags.ref) {
-	        name = entity.tags.ref;
-	        if (network) {
-	            name = network + ' ' + name;
-	        }
-	    }
-
-	    return name;
-	}
-
-
-	function utilDisplayNameForPath(entity) {
-	    var name = utilDisplayName(entity);
-	    var isFirefox = utilDetect().browser.toLowerCase().indexOf('firefox') > -1;
-
-	    if (!isFirefox && name && rtlRegex.test(name)) {
-	        name = fixRTLTextForSvg(name);
-	    }
-
-	    return name;
-	}
-
-
-	function utilDisplayType(id) {
-	    return {
-	        n: _t('inspector.node'),
-	        w: _t('inspector.way'),
-	        r: _t('inspector.relation')
-	    }[id.charAt(0)];
-	}
-
-
-	function utilDisplayLabel(entity, graph) {
-	    var displayName = utilDisplayName(entity);
-	    if (displayName) {
-	        // use the display name if there is one
-	        return displayName;
-	    }
-	    var preset = _mainPresetIndex.match(entity, graph);
-	    if (preset && preset.name()) {
-	        // use the preset name if there is a match
-	        return preset.name();
-	    }
-	    // fallback to the display type (node/way/relation)
-	    return utilDisplayType(entity.id);
-	}
-
-
-	function utilEntityRoot(entityType) {
-	    return {
-	        node: 'n',
-	        way: 'w',
-	        relation: 'r'
-	    }[entityType];
-	}
-
-
-	// Returns a single object containing the tags of all the given entities.
-	// Example:
-	// {
-	//   highway: 'service',
-	//   service: 'parking_aisle'
-	// }
-	//           +
-	// {
-	//   highway: 'service',
-	//   service: 'driveway',
-	//   width: '3'
-	// }
-	//           =
-	// {
-	//   highway: 'service',
-	//   service: [ 'driveway', 'parking_aisle' ],
-	//   width: [ '3', undefined ]
-	// }
-	function utilCombinedTags(entityIDs, graph) {
-
-	    var tags = {};
-	    var tagCounts = {};
-	    var allKeys = new Set();
-
-	    var entities = entityIDs.map(function(entityID) {
-	        return graph.hasEntity(entityID);
-	    }).filter(Boolean);
-
-	    // gather the aggregate keys
-	    entities.forEach(function(entity) {
-	        var keys = Object.keys(entity.tags).filter(Boolean);
-	        keys.forEach(function(key) {
-	            allKeys.add(key);
-	        });
-	    });
-
-	    entities.forEach(function(entity) {
-
-	        allKeys.forEach(function(key) {
-
-	            var value = entity.tags[key]; // purposely allow `undefined`
-
-	            if (!tags.hasOwnProperty(key)) {
-	                // first value, set as raw
-	                tags[key] = value;
-	            } else {
-	                if (!Array.isArray(tags[key])) {
-	                    if (tags[key] !== value) {
-	                        // first alternate value, replace single value with array
-	                        tags[key] = [tags[key], value];
-	                    }
-	                } else { // type is array
-	                    if (tags[key].indexOf(value) === -1) {
-	                        // subsequent alternate value, add to array
-	                        tags[key].push(value);
-	                    }
-	                }
-	            }
-
-	            var tagHash = key + '=' + value;
-	            if (!tagCounts[tagHash]) { tagCounts[tagHash] = 0; }
-	            tagCounts[tagHash] += 1;
-	        });
-	    });
-
-	    for (var key in tags) {
-	        if (!Array.isArray(tags[key])) { continue; }
-
-	        // sort values by frequency then alphabetically
-	        tags[key] = tags[key].sort(function(val1, val2) {
-	            var key = key; // capture
-	            var count2 = tagCounts[key + '=' + val2];
-	            var count1 = tagCounts[key + '=' + val1];
-	            if (count2 !== count1) {
-	                return count2 - count1;
-	            }
-	            if (val2 && val1) {
-	                return val1.localeCompare(val2);
-	            }
-	            return val1 ? 1 : -1;
-	        });
-	    }
-
-	    return tags;
-	}
-
-
-	function utilStringQs(str) {
-	    var i = 0;  // advance past any leading '?' or '#' characters
-	    while (i < str.length && (str[i] === '?' || str[i] === '#')) { i++; }
-	    str = str.slice(i);
-
-	    return str.split('&').reduce(function(obj, pair){
-	        var parts = pair.split('=');
-	        if (parts.length === 2) {
-	            obj[parts[0]] = (null === parts[1]) ? '' : decodeURIComponent(parts[1]);
-	        }
-	        return obj;
-	    }, {});
-	}
-
-
-	function utilQsString(obj, noencode) {
-	    // encode everything except special characters used in certain hash parameters:
-	    // "/" in map states, ":", ",", {" and "}" in background
-	    function softEncode(s) {
-	        return encodeURIComponent(s).replace(/(%2F|%3A|%2C|%7B|%7D)/g, decodeURIComponent);
-	    }
-
-	    return Object.keys(obj).sort().map(function(key) {
-	        return encodeURIComponent(key) + '=' + (
-	            noencode ? softEncode(obj[key]) : encodeURIComponent(obj[key]));
-	    }).join('&');
-	}
-
-
-	function utilPrefixDOMProperty(property) {
-	    var prefixes = ['webkit', 'ms', 'moz', 'o'];
-	    var i = -1;
-	    var n = prefixes.length;
-	    var s = document.body;
-
-	    if (property in s)
-	        { return property; }
-
-	    property = property.substr(0, 1).toUpperCase() + property.substr(1);
-
-	    while (++i < n) {
-	        if (prefixes[i] + property in s) {
-	            return prefixes[i] + property;
-	        }
-	    }
-
-	    return false;
-	}
-
-
-	function utilPrefixCSSProperty(property) {
-	    var prefixes = ['webkit', 'ms', 'Moz', 'O'];
-	    var i = -1;
-	    var n = prefixes.length;
-	    var s = document.body.style;
-
-	    if (property.toLowerCase() in s) {
-	        return property.toLowerCase();
-	    }
-
-	    while (++i < n) {
-	        if (prefixes[i] + property in s) {
-	            return '-' + prefixes[i].toLowerCase() + property.replace(/([A-Z])/g, '-$1').toLowerCase();
-	        }
-	    }
-
-	    return false;
-	}
-
-
-	var transformProperty;
-	function utilSetTransform(el, x, y, scale) {
-	    var prop = transformProperty = transformProperty || utilPrefixCSSProperty('Transform');
-	    var translate = utilDetect().opera ? 'translate('   + x + 'px,' + y + 'px)'
-	        : 'translate3d(' + x + 'px,' + y + 'px,0)';
-	    return el.style(prop, translate + (scale ? ' scale(' + scale + ')' : ''));
-	}
-
-
-	// Calculates Levenshtein distance between two strings
-	// see:  https://en.wikipedia.org/wiki/Levenshtein_distance
-	// first converts the strings to lowercase and replaces diacritic marks with ascii equivalents.
-	function utilEditDistance(a, b) {
-	    a = remove$1(a.toLowerCase());
-	    b = remove$1(b.toLowerCase());
-	    if (a.length === 0) { return b.length; }
-	    if (b.length === 0) { return a.length; }
-	    var matrix = [];
-	    for (var i = 0; i <= b.length; i++) { matrix[i] = [i]; }
-	    for (var j = 0; j <= a.length; j++) { matrix[0][j] = j; }
-	    for (i = 1; i <= b.length; i++) {
-	        for (j = 1; j <= a.length; j++) {
-	            if (b.charAt(i-1) === a.charAt(j-1)) {
-	                matrix[i][j] = matrix[i-1][j-1];
-	            } else {
-	                matrix[i][j] = Math.min(matrix[i-1][j-1] + 1, // substitution
-	                    Math.min(matrix[i][j-1] + 1, // insertion
-	                    matrix[i-1][j] + 1)); // deletion
-	            }
-	        }
-	    }
-	    return matrix[b.length][a.length];
-	}
-
-
-	// a d3.mouse-alike which
-	// 1. Only works on HTML elements, not SVG
-	// 2. Does not cause style recalculation
-	function utilFastMouse(container) {
-	    var rect = container.getBoundingClientRect();
-	    var rectLeft = rect.left;
-	    var rectTop = rect.top;
-	    var clientLeft = +container.clientLeft;
-	    var clientTop = +container.clientTop;
-	    return function(e) {
-	        return [
-	            e.clientX - rectLeft - clientLeft,
-	            e.clientY - rectTop - clientTop];
-	    };
-	}
-
-
-	function utilAsyncMap(inputs, func, callback) {
-	    var remaining = inputs.length;
-	    var results = [];
-	    var errors = [];
-
-	    inputs.forEach(function(d, i) {
-	        func(d, function done(err, data) {
-	            errors[i] = err;
-	            results[i] = data;
-	            remaining--;
-	            if (!remaining) { callback(errors, results); }
-	        });
-	    });
-	}
-
-
-	// wraps an index to an interval [0..length-1]
-	function utilWrap(index, length) {
-	    if (index < 0) {
-	        index += Math.ceil(-index/length)*length;
-	    }
-	    return index % length;
-	}
-
-
-	/**
-	 * a replacement for functor
-	 *
-	 * @param {*} value any value
-	 * @returns {Function} a function that returns that value or the value if it's a function
-	 */
-	function utilFunctor(value) {
-	    if (typeof value === 'function') { return value; }
-	    return function() {
-	        return value;
-	    };
-	}
-
-
-	function utilNoAuto(selection) {
-	    var isText = (selection.size() && selection.node().tagName.toLowerCase() === 'textarea');
-
-	    return selection
-	        // assign 'new-password' even for non-password fields to prevent browsers (Chrome) ignoring 'off'
-	        .attr('autocomplete', 'new-password')
-	        .attr('autocorrect', 'off')
-	        .attr('autocapitalize', 'off')
-	        .attr('spellcheck', isText ? 'true' : 'false');
-	}
-
-
-	// https://stackoverflow.com/questions/194846/is-there-any-kind-of-hash-code-function-in-javascript
-	// https://werxltd.com/wp/2010/05/13/javascript-implementation-of-javas-string-hashcode-method/
-	function utilHashcode(str) {
-	    var hash = 0;
-	    if (str.length === 0) {
-	        return hash;
-	    }
-	    for (var i = 0; i < str.length; i++) {
-	        var char = str.charCodeAt(i);
-	        hash = ((hash << 5) - hash) + char;
-	        hash = hash & hash; // Convert to 32bit integer
-	    }
-	    return hash;
-	}
-
-	// Returns version of `str` with all runs of special characters replaced by `_`;
-	// suitable for HTML ids, classes, selectors, etc.
-	function utilSafeClassName(str) {
-	    return str.toLowerCase().replace(/[^a-z0-9]+/g, '_');
-	}
-
-	// Returns string based on `val` that is highly unlikely to collide with an id
-	// used previously or that's present elsewhere in the document. Useful for preventing
-	// browser-provided autofills or when embedding iD on pages with unknown elements.
-	function utilUniqueDomId(val) {
-	    return 'ideditor-' + utilSafeClassName(val.toString()) + '-' + new Date().getTime().toString();
-	}
-
-	// Returns the length of `str` in unicode characters. This can be less than
-	// `String.length()` since a single unicode character can be composed of multiple
-	// JavaScript UTF-16 code units.
-	function utilUnicodeCharsCount(str) {
-	    // Native ES2015 implementations of `Array.from` split strings into unicode characters
-	    return Array.from(str).length;
-	}
-
-	// Returns a new string representing `str` cut from its start to `limit` length
-	// in unicode characters. Note that this runs the risk of splitting graphemes.
-	function utilUnicodeCharsTruncated(str, limit) {
-	    return Array.from(str).slice(0, limit).join('');
-	}
-
-	function osmEntity(attrs) {
-	    // For prototypal inheritance.
-	    if (this instanceof osmEntity) { return; }
-
-	    // Create the appropriate subtype.
-	    if (attrs && attrs.type) {
-	        return osmEntity[attrs.type].apply(this, arguments);
-	    } else if (attrs && attrs.id) {
-	        return osmEntity[osmEntity.id.type(attrs.id)].apply(this, arguments);
-	    }
-
-	    // Initialize a generic Entity (used only in tests).
-	    return (new osmEntity()).initialize(arguments);
-	}
-
-
-	osmEntity.id = function(type) {
-	    return osmEntity.id.fromOSM(type, osmEntity.id.next[type]--);
-	};
-
-
-	osmEntity.id.next = {
-	    changeset: -1, node: -1, way: -1, relation: -1
-	};
-
-
-	osmEntity.id.fromOSM = function(type, id) {
-	    return type[0] + id;
-	};
-
-
-	osmEntity.id.toOSM = function(id) {
-	    return id.slice(1);
-	};
-
-
-	osmEntity.id.type = function(id) {
-	    return { 'c': 'changeset', 'n': 'node', 'w': 'way', 'r': 'relation' }[id[0]];
-	};
-
-
-	// A function suitable for use as the second argument to d3.selection#data().
-	osmEntity.key = function(entity) {
-	    return entity.id + 'v' + (entity.v || 0);
-	};
-
-	var _deprecatedTagValuesByKey;
-
-	osmEntity.deprecatedTagValuesByKey = function(dataDeprecated) {
-	    if (!_deprecatedTagValuesByKey) {
-	        _deprecatedTagValuesByKey = {};
-	        dataDeprecated.forEach(function(d) {
-	            var oldKeys = Object.keys(d.old);
-	            if (oldKeys.length === 1) {
-	                var oldKey = oldKeys[0];
-	                var oldValue = d.old[oldKey];
-	                if (oldValue !== '*') {
-	                    if (!_deprecatedTagValuesByKey[oldKey]) {
-	                        _deprecatedTagValuesByKey[oldKey] = [oldValue];
-	                    } else {
-	                        _deprecatedTagValuesByKey[oldKey].push(oldValue);
-	                    }
-	                }
-	            }
-	        });
-	    }
-	    return _deprecatedTagValuesByKey;
-	};
-
-
-	osmEntity.prototype = {
-
-	    tags: {},
-
-
-	    initialize: function(sources) {
-	        for (var i = 0; i < sources.length; ++i) {
-	            var source = sources[i];
-	            for (var prop in source) {
-	                if (Object.prototype.hasOwnProperty.call(source, prop)) {
-	                    if (source[prop] === undefined) {
-	                        delete this[prop];
-	                    } else {
-	                        this[prop] = source[prop];
-	                    }
-	                }
-	            }
-	        }
-
-	        if (!this.id && this.type) {
-	            this.id = osmEntity.id(this.type);
-	        }
-	        if (!this.hasOwnProperty('visible')) {
-	            this.visible = true;
-	        }
-
-	        return this;
-	    },
-
-
-	    copy: function(resolver, copies) {
-	        if (copies[this.id])
-	            { return copies[this.id]; }
-
-	        var copy = osmEntity(this, { id: undefined, user: undefined, version: undefined });
-	        copies[this.id] = copy;
-
-	        return copy;
-	    },
-
-
-	    osmId: function() {
-	        return osmEntity.id.toOSM(this.id);
-	    },
-
-
-	    isNew: function() {
-	        return this.osmId() < 0;
-	    },
-
-
-	    update: function(attrs) {
-	        return osmEntity(this, attrs, { v: 1 + (this.v || 0) });
-	    },
-
-
-	    mergeTags: function(tags) {
-	        var merged = Object.assign({}, this.tags);   // shallow copy
-	        var changed = false;
-	        for (var k in tags) {
-	            var t1 = merged[k];
-	            var t2 = tags[k];
-	            if (!t1) {
-	                changed = true;
-	                merged[k] = t2;
-	            } else if (t1 !== t2) {
-	                changed = true;
-	                merged[k] = utilUnicodeCharsTruncated(
-	                    utilArrayUnion(t1.split(/;\s*/), t2.split(/;\s*/)).join(';'),
-	                    255 // avoid exceeding character limit; see also services/osm.js -> maxCharsForTagValue()
-	                );
-	            }
-	        }
-	        return changed ? this.update({ tags: merged }) : this;
-	    },
-
-
-	    intersects: function(extent, resolver) {
-	        return this.extent(resolver).intersects(extent);
-	    },
-
-
-	    hasNonGeometryTags: function() {
-	        return Object.keys(this.tags).some(function(k) { return k !== 'area'; });
-	    },
-
-	    hasParentRelations: function(resolver) {
-	        return resolver.parentRelations(this).length > 0;
-	    },
-
-	    hasInterestingTags: function() {
-	        return Object.keys(this.tags).some(osmIsInterestingTag);
-	    },
-
-	    hasWikidata: function() {
-	        return !!this.tags.wikidata || !!this.tags['brand:wikidata'];
-	    },
-
-	    isHighwayIntersection: function() {
-	        return false;
-	    },
-
-	    isDegenerate: function() {
-	        return true;
-	    },
-
-	    deprecatedTags: function(dataDeprecated) {
-	        var tags = this.tags;
-
-	        // if there are no tags, none can be deprecated
-	        if (Object.keys(tags).length === 0) { return []; }
-
-	        var deprecated = [];
-	        dataDeprecated.forEach(function(d) {
-	            var oldKeys = Object.keys(d.old);
-	            var matchesDeprecatedTags = oldKeys.every(function(oldKey) {
-	                if (!tags[oldKey]) { return false; }
-	                if (d.old[oldKey] === '*') { return true; }
-
-	                var vals = tags[oldKey].split(';').filter(Boolean);
-	                if (vals.length === 0) {
-	                    return false;
-	                } else if (vals.length > 1) {
-	                    return vals.indexOf(d.old[oldKey]) !== -1;
-	                } else {
-	                    if (tags[oldKey] === d.old[oldKey]) {
-	                        if (d.replace && d.old[oldKey] === d.replace[oldKey]) {
-	                            var replaceKeys = Object.keys(d.replace);
-	                            return !replaceKeys.every(function(replaceKey) {
-	                                return tags[replaceKey] === d.replace[replaceKey];
-	                            });
-	                        } else {
-	                            return true;
-	                        }
-	                    }
-	                }
-	                return false;
-	            });
-	            if (matchesDeprecatedTags) {
-	                deprecated.push(d);
-	            }
-	        });
-
-	        return deprecated;
-	    }
-	};
-
-	function osmLanes(entity) {
-	    if (entity.type !== 'way') { return null; }
-	    if (!entity.tags.highway) { return null; }
-
-	    var tags = entity.tags;
-	    var isOneWay = entity.isOneWay();
-	    var laneCount = getLaneCount(tags, isOneWay);
-	    var maxspeed = parseMaxspeed(tags);
-
-	    var laneDirections = parseLaneDirections(tags, isOneWay, laneCount);
-	    var forward = laneDirections.forward;
-	    var backward = laneDirections.backward;
-	    var bothways = laneDirections.bothways;
-
-	    // parse the piped string 'x|y|z' format
-	    var turnLanes = {};
-	    turnLanes.unspecified = parseTurnLanes(tags['turn:lanes']);
-	    turnLanes.forward = parseTurnLanes(tags['turn:lanes:forward']);
-	    turnLanes.backward = parseTurnLanes(tags['turn:lanes:backward']);
-
-	    var maxspeedLanes = {};
-	    maxspeedLanes.unspecified = parseMaxspeedLanes(tags['maxspeed:lanes'], maxspeed);
-	    maxspeedLanes.forward = parseMaxspeedLanes(tags['maxspeed:lanes:forward'], maxspeed);
-	    maxspeedLanes.backward = parseMaxspeedLanes(tags['maxspeed:lanes:backward'], maxspeed);
-
-	    var psvLanes = {};
-	    psvLanes.unspecified = parseMiscLanes(tags['psv:lanes']);
-	    psvLanes.forward = parseMiscLanes(tags['psv:lanes:forward']);
-	    psvLanes.backward = parseMiscLanes(tags['psv:lanes:backward']);
-
-	    var busLanes = {};
-	    busLanes.unspecified = parseMiscLanes(tags['bus:lanes']);
-	    busLanes.forward = parseMiscLanes(tags['bus:lanes:forward']);
-	    busLanes.backward = parseMiscLanes(tags['bus:lanes:backward']);
-
-	    var taxiLanes = {};
-	    taxiLanes.unspecified = parseMiscLanes(tags['taxi:lanes']);
-	    taxiLanes.forward = parseMiscLanes(tags['taxi:lanes:forward']);
-	    taxiLanes.backward = parseMiscLanes(tags['taxi:lanes:backward']);
-
-	    var hovLanes = {};
-	    hovLanes.unspecified = parseMiscLanes(tags['hov:lanes']);
-	    hovLanes.forward = parseMiscLanes(tags['hov:lanes:forward']);
-	    hovLanes.backward = parseMiscLanes(tags['hov:lanes:backward']);
-
-	    var hgvLanes = {};
-	    hgvLanes.unspecified = parseMiscLanes(tags['hgv:lanes']);
-	    hgvLanes.forward = parseMiscLanes(tags['hgv:lanes:forward']);
-	    hgvLanes.backward = parseMiscLanes(tags['hgv:lanes:backward']);
-
-	    var bicyclewayLanes = {};
-	    bicyclewayLanes.unspecified = parseBicycleWay(tags['bicycleway:lanes']);
-	    bicyclewayLanes.forward = parseBicycleWay(tags['bicycleway:lanes:forward']);
-	    bicyclewayLanes.backward = parseBicycleWay(tags['bicycleway:lanes:backward']);
-
-	    var lanesObj = {
-	        forward: [],
-	        backward: [],
-	        unspecified: []
-	    };
-
-	    // map forward/backward/unspecified of each lane type to lanesObj
-	    mapToLanesObj(lanesObj, turnLanes, 'turnLane');
-	    mapToLanesObj(lanesObj, maxspeedLanes, 'maxspeed');
-	    mapToLanesObj(lanesObj, psvLanes, 'psv');
-	    mapToLanesObj(lanesObj, busLanes, 'bus');
-	    mapToLanesObj(lanesObj, taxiLanes, 'taxi');
-	    mapToLanesObj(lanesObj, hovLanes, 'hov');
-	    mapToLanesObj(lanesObj, hgvLanes, 'hgv');
-	    mapToLanesObj(lanesObj, bicyclewayLanes, 'bicycleway');
-
-	    return {
-	        metadata: {
-	            count: laneCount,
-	            oneway: isOneWay,
-	            forward: forward,
-	            backward: backward,
-	            bothways: bothways,
-	            turnLanes: turnLanes,
-	            maxspeed: maxspeed,
-	            maxspeedLanes: maxspeedLanes,
-	            psvLanes: psvLanes,
-	            busLanes: busLanes,
-	            taxiLanes: taxiLanes,
-	            hovLanes: hovLanes,
-	            hgvLanes: hgvLanes,
-	            bicyclewayLanes: bicyclewayLanes
-	        },
-	        lanes: lanesObj
-	    };
-	}
-
-
-	function getLaneCount(tags, isOneWay) {
-	    var count;
-	    if (tags.lanes) {
-	        count = parseInt(tags.lanes, 10);
-	        if (count > 0) {
-	            return count;
-	        }
-	    }
-
-
-	    switch (tags.highway) {
-	        case 'trunk':
-	        case 'motorway':
-	            count = isOneWay ? 2 : 4;
-	            break;
-	        default:
-	            count = isOneWay ? 1 : 2;
-	            break;
-	    }
-
-	    return count;
-	}
-
-
-	function parseMaxspeed(tags) {
-	    var maxspeed = tags.maxspeed;
-	    if (!maxspeed) { return; }
-
-	    var maxspeedRegex = /^([0-9][\.0-9]+?)(?:[ ]?(?:km\/h|kmh|kph|mph|knots))?$/;
-	    if (!maxspeedRegex.test(maxspeed)) { return; }
-
-	    return parseInt(maxspeed, 10);
-	}
-
-
-	function parseLaneDirections(tags, isOneWay, laneCount) {
-	    var forward = parseInt(tags['lanes:forward'], 10);
-	    var backward = parseInt(tags['lanes:backward'], 10);
-	    var bothways = parseInt(tags['lanes:both_ways'], 10) > 0 ? 1 : 0;
-
-	    if (parseInt(tags.oneway, 10) === -1) {
-	        forward = 0;
-	        bothways = 0;
-	        backward = laneCount;
-	    }
-	    else if (isOneWay) {
-	        forward = laneCount;
-	        bothways = 0;
-	        backward = 0;
-	    }
-	    else if (isNaN(forward) && isNaN(backward)) {
-	        backward = Math.floor((laneCount - bothways) / 2);
-	        forward = laneCount - bothways - backward;
-	    }
-	    else if (isNaN(forward)) {
-	        if (backward > laneCount - bothways) {
-	            backward = laneCount - bothways;
-	        }
-	        forward = laneCount - bothways - backward;
-	    }
-	    else if (isNaN(backward)) {
-	        if (forward > laneCount - bothways) {
-	            forward = laneCount - bothways;
-	        }
-	        backward = laneCount - bothways - forward;
-	    }
-	    return {
-	        forward: forward,
-	        backward: backward,
-	        bothways: bothways
-	    };
-	}
-
-
-	function parseTurnLanes(tag){
-	    if (!tag) { return; }
-
-	    var validValues = [
-	        'left', 'slight_left', 'sharp_left', 'through', 'right', 'slight_right',
-	        'sharp_right', 'reverse', 'merge_to_left', 'merge_to_right', 'none'
-	    ];
-
-	    return tag.split('|')
-	        .map(function (s) {
-	            if (s === '') { s = 'none'; }
-	            return s.split(';')
-	                .map(function (d) {
-	                    return validValues.indexOf(d) === -1 ? 'unknown': d;
-	                });
-	        });
-	}
-
-
-	function parseMaxspeedLanes(tag, maxspeed) {
-	    if (!tag) { return; }
-
-	    return tag.split('|')
-	        .map(function (s) {
-	            if (s === 'none') { return s; }
-	            var m = parseInt(s, 10);
-	            if (s === '' || m === maxspeed) { return null; }
-	            return isNaN(m) ? 'unknown': m;
-	        });
-	}
-
-
-	function parseMiscLanes(tag) {
-	    if (!tag) { return; }
-
-	    var validValues = [
-	        'yes', 'no', 'designated'
-	    ];
-
-	    return tag.split('|')
-	        .map(function (s) {
-	            if (s === '') { s = 'no'; }
-	            return validValues.indexOf(s) === -1 ? 'unknown': s;
-	        });
-	}
-
-
-	function parseBicycleWay(tag) {
-	    if (!tag) { return; }
-
-	    var validValues = [
-	        'yes', 'no', 'designated', 'lane'
-	    ];
-
-	    return tag.split('|')
-	        .map(function (s) {
-	            if (s === '') { s = 'no'; }
-	            return validValues.indexOf(s) === -1 ? 'unknown': s;
-	        });
-	}
-
-
-	function mapToLanesObj(lanesObj, data, key) {
-	    if (data.forward) { data.forward.forEach(function(l, i) {
-	        if (!lanesObj.forward[i]) { lanesObj.forward[i] = {}; }
-	        lanesObj.forward[i][key] = l;
-	    }); }
-	    if (data.backward) { data.backward.forEach(function(l, i) {
-	        if (!lanesObj.backward[i]) { lanesObj.backward[i] = {}; }
-	        lanesObj.backward[i][key] = l;
-	    }); }
-	    if (data.unspecified) { data.unspecified.forEach(function(l, i) {
-	        if (!lanesObj.unspecified[i]) { lanesObj.unspecified[i] = {}; }
-	        lanesObj.unspecified[i][key] = l;
-	    }); }
-	}
-
-	function osmWay() {
-	    if (!(this instanceof osmWay)) {
-	        return (new osmWay()).initialize(arguments);
-	    } else if (arguments.length) {
-	        this.initialize(arguments);
-	    }
-	}
-
-
-	osmEntity.way = osmWay;
-
-	osmWay.prototype = Object.create(osmEntity.prototype);
-
-
-	Object.assign(osmWay.prototype, {
-	    type: 'way',
-	    nodes: [],
-
-
-	    copy: function(resolver, copies) {
-	        if (copies[this.id]) { return copies[this.id]; }
-
-	        var copy = osmEntity.prototype.copy.call(this, resolver, copies);
-
-	        var nodes = this.nodes.map(function(id) {
-	            return resolver.entity(id).copy(resolver, copies).id;
-	        });
-
-	        copy = copy.update({ nodes: nodes });
-	        copies[this.id] = copy;
-
-	        return copy;
-	    },
-
-
-	    extent: function(resolver) {
-	        return resolver.transient(this, 'extent', function() {
-	            var extent = geoExtent();
-	            for (var i = 0; i < this.nodes.length; i++) {
-	                var node = resolver.hasEntity(this.nodes[i]);
-	                if (node) {
-	                    extent._extend(node.extent());
-	                }
-	            }
-	            return extent;
-	        });
-	    },
-
-
-	    first: function() {
-	        return this.nodes[0];
-	    },
-
-
-	    last: function() {
-	        return this.nodes[this.nodes.length - 1];
-	    },
-
-
-	    contains: function(node) {
-	        return this.nodes.indexOf(node) >= 0;
-	    },
-
-
-	    affix: function(node) {
-	        if (this.nodes[0] === node) { return 'prefix'; }
-	        if (this.nodes[this.nodes.length - 1] === node) { return 'suffix'; }
-	    },
-
-
-	    layer: function() {
-	        // explicit layer tag, clamp between -10, 10..
-	        if (isFinite(this.tags.layer)) {
-	            return Math.max(-10, Math.min(+(this.tags.layer), 10));
-	        }
-
-	        // implied layer tag..
-	        if (this.tags.covered === 'yes') { return -1; }
-	        if (this.tags.location === 'overground') { return 1; }
-	        if (this.tags.location === 'underground') { return -1; }
-	        if (this.tags.location === 'underwater') { return -10; }
-
-	        if (this.tags.power === 'line') { return 10; }
-	        if (this.tags.power === 'minor_line') { return 10; }
-	        if (this.tags.aerialway) { return 10; }
-	        if (this.tags.bridge) { return 1; }
-	        if (this.tags.cutting) { return -1; }
-	        if (this.tags.tunnel) { return -1; }
-	        if (this.tags.waterway) { return -1; }
-	        if (this.tags.man_made === 'pipeline') { return -10; }
-	        if (this.tags.boundary) { return -10; }
-	        return 0;
-	    },
-
-
-	    // the approximate width of the line based on its tags except its `width` tag
-	    impliedLineWidthMeters: function() {
-	        var averageWidths = {
-	            highway: { // width is for single lane
-	                motorway: 5, motorway_link: 5, trunk: 4.5, trunk_link: 4.5,
-	                primary: 4, secondary: 4, tertiary: 4,
-	                primary_link: 4, secondary_link: 4, tertiary_link: 4,
-	                unclassified: 4, road: 4, living_street: 4, bus_guideway: 4, pedestrian: 4,
-	                residential: 3.5, service: 3.5, track: 3, cycleway: 2.5,
-	                bridleway: 2, corridor: 2, steps: 2, path: 1.5, footway: 1.5
-	            },
-	            railway: { // width includes ties and rail bed, not just track gauge
-	                rail: 2.5, light_rail: 2.5, tram: 2.5, subway: 2.5,
-	                monorail: 2.5, funicular: 2.5, disused: 2.5, preserved: 2.5,
-	                miniature: 1.5, narrow_gauge: 1.5
-	            },
-	            waterway: {
-	                river: 50, canal: 25, stream: 5, tidal_channel: 5, fish_pass: 2.5, drain: 2.5, ditch: 1.5
-	            }
-	        };
-	        for (var key in averageWidths) {
-	            if (this.tags[key] && averageWidths[key][this.tags[key]]) {
-	                var width = averageWidths[key][this.tags[key]];
-	                if (key === 'highway') {
-	                    var laneCount = this.tags.lanes && parseInt(this.tags.lanes, 10);
-	                    if (!laneCount) { laneCount = this.isOneWay() ? 1 : 2; }
-
-	                    return width * laneCount;
-	                }
-	                return width;
-	            }
-	        }
-	        return null;
-	    },
-
-
-	    isOneWay: function() {
-	        // explicit oneway tag..
-	        var values = {
-	            'yes': true,
-	            '1': true,
-	            '-1': true,
-	            'reversible': true,
-	            'alternating': true,
-	            'no': false,
-	            '0': false
-	        };
-	        if (values[this.tags.oneway] !== undefined) {
-	            return values[this.tags.oneway];
-	        }
-
-	        // implied oneway tag..
-	        for (var key in this.tags) {
-	            if (key in osmOneWayTags && (this.tags[key] in osmOneWayTags[key]))
-	                { return true; }
-	        }
-	        return false;
-	    },
-
-	    // Some identifier for tag that implies that this way is "sided",
-	    // i.e. the right side is the 'inside' (e.g. the right side of a
-	    // natural=cliff is lower).
-	    sidednessIdentifier: function() {
-	        for (var key in this.tags) {
-	            var value = this.tags[key];
-	            if (key in osmRightSideIsInsideTags && (value in osmRightSideIsInsideTags[key])) {
-	                if (osmRightSideIsInsideTags[key][value] === true) {
-	                    return key;
-	                } else {
-	                    // if the map's value is something other than a
-	                    // literal true, we should use it so we can
-	                    // special case some keys (e.g. natural=coastline
-	                    // is handled differently to other naturals).
-	                    return osmRightSideIsInsideTags[key][value];
-	                }
-	            }
-	        }
-
-	        return null;
-	    },
-
-	    isSided: function() {
-	        if (this.tags.two_sided === 'yes') {
-	            return false;
-	        }
-
-	        return this.sidednessIdentifier() !== null;
-	    },
-
-	    lanes: function() {
-	        return osmLanes(this);
-	    },
-
-
-	    isClosed: function() {
-	        return this.nodes.length > 1 && this.first() === this.last();
-	    },
-
-
-	    isConvex: function(resolver) {
-	        if (!this.isClosed() || this.isDegenerate()) { return null; }
-
-	        var nodes = utilArrayUniq(resolver.childNodes(this));
-	        var coords = nodes.map(function(n) { return n.loc; });
-	        var curr = 0;
-	        var prev = 0;
-
-	        for (var i = 0; i < coords.length; i++) {
-	            var o = coords[(i+1) % coords.length];
-	            var a = coords[i];
-	            var b = coords[(i+2) % coords.length];
-	            var res = geoVecCross(a, b, o);
-
-	            curr = (res > 0) ? 1 : (res < 0) ? -1 : 0;
-	            if (curr === 0) {
-	                continue;
-	            } else if (prev && curr !== prev) {
-	                return false;
-	            }
-	            prev = curr;
-	        }
-	        return true;
-	    },
-
-	    // returns an object with the tag that implies this is an area, if any
-	    tagSuggestingArea: function() {
-	        return osmTagSuggestingArea(this.tags);
-	    },
-
-	    isArea: function() {
-	        if (this.tags.area === 'yes')
-	            { return true; }
-	        if (!this.isClosed() || this.tags.area === 'no')
-	            { return false; }
-	        return this.tagSuggestingArea() !== null;
-	    },
-
-
-	    isDegenerate: function() {
-	        return (new Set(this.nodes).size < (this.isArea() ? 3 : 2));
-	    },
-
-
-	    areAdjacent: function(n1, n2) {
-	        for (var i = 0; i < this.nodes.length; i++) {
-	            if (this.nodes[i] === n1) {
-	                if (this.nodes[i - 1] === n2) { return true; }
-	                if (this.nodes[i + 1] === n2) { return true; }
-	            }
-	        }
-	        return false;
-	    },
-
-
-	    geometry: function(graph) {
-	        return graph.transient(this, 'geometry', function() {
-	            return this.isArea() ? 'area' : 'line';
-	        });
-	    },
-
-
-	    // returns an array of objects representing the segments between the nodes in this way
-	    segments: function(graph) {
-
-	        function segmentExtent(graph) {
-	            var n1 = graph.hasEntity(this.nodes[0]);
-	            var n2 = graph.hasEntity(this.nodes[1]);
-	            return n1 && n2 && geoExtent([
-	                [
-	                    Math.min(n1.loc[0], n2.loc[0]),
-	                    Math.min(n1.loc[1], n2.loc[1])
-	                ],
-	                [
-	                    Math.max(n1.loc[0], n2.loc[0]),
-	                    Math.max(n1.loc[1], n2.loc[1])
-	                ]
-	            ]);
-	        }
-
-	        return graph.transient(this, 'segments', function() {
-	            var segments = [];
-	            for (var i = 0; i < this.nodes.length - 1; i++) {
-	                segments.push({
-	                    id: this.id + '-' + i,
-	                    wayId: this.id,
-	                    index: i,
-	                    nodes: [this.nodes[i], this.nodes[i + 1]],
-	                    extent: segmentExtent
-	                });
-	            }
-	            return segments;
-	        });
-	    },
-
-
-	    // If this way is not closed, append the beginning node to the end of the nodelist to close it.
-	    close: function() {
-	        if (this.isClosed() || !this.nodes.length) { return this; }
-
-	        var nodes = this.nodes.slice();
-	        nodes = nodes.filter(noRepeatNodes);
-	        nodes.push(nodes[0]);
-	        return this.update({ nodes: nodes });
-	    },
-
-
-	    // If this way is closed, remove any connector nodes from the end of the nodelist to unclose it.
-	    unclose: function() {
-	        if (!this.isClosed()) { return this; }
-
-	        var nodes = this.nodes.slice();
-	        var connector = this.first();
-	        var i = nodes.length - 1;
-
-	        // remove trailing connectors..
-	        while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
-	            nodes.splice(i, 1);
-	            i = nodes.length - 1;
-	        }
-
-	        nodes = nodes.filter(noRepeatNodes);
-	        return this.update({ nodes: nodes });
-	    },
-
-
-	    // Adds a node (id) in front of the node which is currently at position index.
-	    // If index is undefined, the node will be added to the end of the way for linear ways,
-	    //   or just before the final connecting node for circular ways.
-	    // Consecutive duplicates are eliminated including existing ones.
-	    // Circularity is always preserved when adding a node.
-	    addNode: function(id, index) {
-	        var nodes = this.nodes.slice();
-	        var isClosed = this.isClosed();
-	        var max = isClosed ? nodes.length - 1 : nodes.length;
-
-	        if (index === undefined) {
-	            index = max;
-	        }
-
-	        if (index < 0 || index > max) {
-	            throw new RangeError('index ' + index + ' out of range 0..' + max);
-	        }
-
-	        // If this is a closed way, remove all connector nodes except the first one
-	        // (there may be duplicates) and adjust index if necessary..
-	        if (isClosed) {
-	            var connector = this.first();
-
-	            // leading connectors..
-	            var i = 1;
-	            while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
-	                nodes.splice(i, 1);
-	                if (index > i) { index--; }
-	            }
-
-	            // trailing connectors..
-	            i = nodes.length - 1;
-	            while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
-	                nodes.splice(i, 1);
-	                if (index > i) { index--; }
-	                i = nodes.length - 1;
-	            }
-	        }
-
-	        nodes.splice(index, 0, id);
-	        nodes = nodes.filter(noRepeatNodes);
-
-	        // If the way was closed before, append a connector node to keep it closed..
-	        if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-	            nodes.push(nodes[0]);
-	        }
-
-	        return this.update({ nodes: nodes });
-	    },
-
-
-	    // Replaces the node which is currently at position index with the given node (id).
-	    // Consecutive duplicates are eliminated including existing ones.
-	    // Circularity is preserved when updating a node.
-	    updateNode: function(id, index) {
-	        var nodes = this.nodes.slice();
-	        var isClosed = this.isClosed();
-	        var max = nodes.length - 1;
-
-	        if (index === undefined || index < 0 || index > max) {
-	            throw new RangeError('index ' + index + ' out of range 0..' + max);
-	        }
-
-	        // If this is a closed way, remove all connector nodes except the first one
-	        // (there may be duplicates) and adjust index if necessary..
-	        if (isClosed) {
-	            var connector = this.first();
-
-	            // leading connectors..
-	            var i = 1;
-	            while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
-	                nodes.splice(i, 1);
-	                if (index > i) { index--; }
-	            }
-
-	            // trailing connectors..
-	            i = nodes.length - 1;
-	            while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
-	                nodes.splice(i, 1);
-	                if (index === i) { index = 0; }  // update leading connector instead
-	                i = nodes.length - 1;
-	            }
-	        }
-
-	        nodes.splice(index, 1, id);
-	        nodes = nodes.filter(noRepeatNodes);
-
-	        // If the way was closed before, append a connector node to keep it closed..
-	        if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-	            nodes.push(nodes[0]);
-	        }
-
-	        return this.update({nodes: nodes});
-	    },
-
-
-	    // Replaces each occurrence of node id needle with replacement.
-	    // Consecutive duplicates are eliminated including existing ones.
-	    // Circularity is preserved.
-	    replaceNode: function(needleID, replacementID) {
-	        var nodes = this.nodes.slice();
-	        var isClosed = this.isClosed();
-
-	        for (var i = 0; i < nodes.length; i++) {
-	            if (nodes[i] === needleID) {
-	                nodes[i] = replacementID;
-	            }
-	        }
-
-	        nodes = nodes.filter(noRepeatNodes);
-
-	        // If the way was closed before, append a connector node to keep it closed..
-	        if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-	            nodes.push(nodes[0]);
-	        }
-
-	        return this.update({nodes: nodes});
-	    },
-
-
-	    // Removes each occurrence of node id.
-	    // Consecutive duplicates are eliminated including existing ones.
-	    // Circularity is preserved.
-	    removeNode: function(id) {
-	        var nodes = this.nodes.slice();
-	        var isClosed = this.isClosed();
-
-	        nodes = nodes
-	            .filter(function(node) { return node !== id; })
-	            .filter(noRepeatNodes);
-
-	        // If the way was closed before, append a connector node to keep it closed..
-	        if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-	            nodes.push(nodes[0]);
-	        }
-
-	        return this.update({nodes: nodes});
-	    },
-
-
-	    asJXON: function(changeset_id) {
-	        var r = {
-	            way: {
-	                '@id': this.osmId(),
-	                '@version': this.version || 0,
-	                nd: this.nodes.map(function(id) {
-	                    return { keyAttributes: { ref: osmEntity.id.toOSM(id) } };
-	                }, this),
-	                tag: Object.keys(this.tags).map(function(k) {
-	                    return { keyAttributes: { k: k, v: this.tags[k] } };
-	                }, this)
-	            }
-	        };
-	        if (changeset_id) {
-	            r.way['@changeset'] = changeset_id;
-	        }
-	        return r;
-	    },
-
-
-	    asGeoJSON: function(resolver) {
-	        return resolver.transient(this, 'GeoJSON', function() {
-	            var coordinates = resolver.childNodes(this)
-	                .map(function(n) { return n.loc; });
-
-	            if (this.isArea() && this.isClosed()) {
-	                return {
-	                    type: 'Polygon',
-	                    coordinates: [coordinates]
-	                };
-	            } else {
-	                return {
-	                    type: 'LineString',
-	                    coordinates: coordinates
-	                };
-	            }
-	        });
-	    },
-
-
-	    area: function(resolver) {
-	        return resolver.transient(this, 'area', function() {
-	            var nodes = resolver.childNodes(this);
-
-	            var json = {
-	                type: 'Polygon',
-	                coordinates: [ nodes.map(function(n) { return n.loc; }) ]
-	            };
-
-	            if (!this.isClosed() && nodes.length) {
-	                json.coordinates[0].push(nodes[0].loc);
-	            }
-
-	            var area = d3_geoArea(json);
-
-	            // Heuristic for detecting counterclockwise winding order. Assumes
-	            // that OpenStreetMap polygons are not hemisphere-spanning.
-	            if (area > 2 * Math.PI) {
-	                json.coordinates[0] = json.coordinates[0].reverse();
-	                area = d3_geoArea(json);
-	            }
-
-	            return isNaN(area) ? 0 : area;
-	        });
-	    }
-	});
-
-
-	// Filter function to eliminate consecutive duplicates.
-	function noRepeatNodes(node, i, arr) {
-	    return i === 0 || node !== arr[i - 1];
-	}
-
-	// "Old" multipolyons, previously known as "simple" multipolygons, are as follows:
-	//
-	// 1. Relation tagged with `type=multipolygon` and no interesting tags.
-	// 2. One and only one member with the `outer` role. Must be a way with interesting tags.
-	// 3. No members without a role.
-	//
-	// Old multipolygons are no longer recommended but are still rendered as areas by iD.
-
-	function osmOldMultipolygonOuterMemberOfRelation(entity, graph) {
-	    if (entity.type !== 'relation' ||
-	        !entity.isMultipolygon()
-	        || Object.keys(entity.tags).filter(osmIsInterestingTag).length > 1) {
-	        return false;
-	    }
-
-	    var outerMember;
-	    for (var memberIndex in entity.members) {
-	        var member = entity.members[memberIndex];
-	        if (!member.role || member.role === 'outer') {
-	            if (outerMember) { return false; }
-	            if (member.type !== 'way') { return false; }
-	            if (!graph.hasEntity(member.id)) { return false; }
-
-	            outerMember = graph.entity(member.id);
-
-	            if (Object.keys(outerMember.tags).filter(osmIsInterestingTag).length === 0) {
-	                return false;
-	            }
-	        }
-	    }
-
-	    return outerMember;
-	}
-
-	// For fixing up rendering of multipolygons with tags on the outer member.
-	// https://github.com/openstreetmap/iD/issues/613
-	function osmIsOldMultipolygonOuterMember(entity, graph) {
-	    if (entity.type !== 'way' || Object.keys(entity.tags).filter(osmIsInterestingTag).length === 0)
-	        { return false; }
-
-	    var parents = graph.parentRelations(entity);
-	    if (parents.length !== 1)
-	        { return false; }
-
-	    var parent = parents[0];
-	    if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1)
-	        { return false; }
-
-	    var members = parent.members, member;
-	    for (var i = 0; i < members.length; i++) {
-	        member = members[i];
-	        if (member.id === entity.id && member.role && member.role !== 'outer')
-	            { return false; } // Not outer member
-	        if (member.id !== entity.id && (!member.role || member.role === 'outer'))
-	            { return false; } // Not a simple multipolygon
-	    }
-
-	    return parent;
-	}
-
-
-	function osmOldMultipolygonOuterMember(entity, graph) {
-	    if (entity.type !== 'way')
-	        { return false; }
-
-	    var parents = graph.parentRelations(entity);
-	    if (parents.length !== 1)
-	        { return false; }
-
-	    var parent = parents[0];
-	    if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1)
-	        { return false; }
-
-	    var members = parent.members, member, outerMember;
-	    for (var i = 0; i < members.length; i++) {
-	        member = members[i];
-	        if (!member.role || member.role === 'outer') {
-	            if (outerMember)
-	                { return false; } // Not a simple multipolygon
-	            outerMember = member;
-	        }
-	    }
-
-	    if (!outerMember)
-	        { return false; }
-
-	    var outerEntity = graph.hasEntity(outerMember.id);
-	    if (!outerEntity || !Object.keys(outerEntity.tags).filter(osmIsInterestingTag).length)
-	        { return false; }
-
-	    return outerEntity;
-	}
-
-
-	// Join `toJoin` array into sequences of connecting ways.
-
-	// Segments which share identical start/end nodes will, as much as possible,
-	// be connected with each other.
-	//
-	// The return value is a nested array. Each constituent array contains elements
-	// of `toJoin` which have been determined to connect.
-	//
-	// Each consitituent array also has a `nodes` property whose value is an
-	// ordered array of member nodes, with appropriate order reversal and
-	// start/end coordinate de-duplication.
-	//
-	// Members of `toJoin` must have, at minimum, `type` and `id` properties.
-	// Thus either an array of `osmWay`s or a relation member array may be used.
-	//
-	// If an member is an `osmWay`, its tags and childnodes may be reversed via
-	// `actionReverse` in the output.
-	//
-	// The returned sequences array also has an `actions` array property, containing
-	// any reversal actions that should be applied to the graph, should the calling
-	// code attempt to actually join the given ways.
-	//
-	// Incomplete members (those for which `graph.hasEntity(element.id)` returns
-	// false) and non-way members are ignored.
-	//
-	function osmJoinWays(toJoin, graph) {
-	    function resolve(member) {
-	        return graph.childNodes(graph.entity(member.id));
-	    }
-
-	    function reverse(item) {
-	        var action = actionReverse(item.id, { reverseOneway: true });
-	        sequences.actions.push(action);
-	        return (item instanceof osmWay) ? action(graph).entity(item.id) : item;
-	    }
-
-	    // make a copy containing only the items to join
-	    toJoin = toJoin.filter(function(member) {
-	        return member.type === 'way' && graph.hasEntity(member.id);
-	    });
-
-	    // Are the things we are joining relation members or `osmWays`?
-	    // If `osmWays`, skip the "prefer a forward path" code below (see #4872)
-	    var i;
-	    var joinAsMembers = true;
-	    for (i = 0; i < toJoin.length; i++) {
-	        if (toJoin[i] instanceof osmWay) {
-	            joinAsMembers = false;
-	            break;
-	        }
-	    }
-
-	    var sequences = [];
-	    sequences.actions = [];
-
-	    while (toJoin.length) {
-	        // start a new sequence
-	        var item = toJoin.shift();
-	        var currWays = [item];
-	        var currNodes = resolve(item).slice();
-	        var doneSequence = false;
-
-	        // add to it
-	        while (toJoin.length && !doneSequence) {
-	            var start = currNodes[0];
-	            var end = currNodes[currNodes.length - 1];
-	            var fn = null;
-	            var nodes = null;
-
-	            // Find the next way/member to join.
-	            for (i = 0; i < toJoin.length; i++) {
-	                item = toJoin[i];
-	                nodes = resolve(item);
-
-	                // (for member ordering only, not way ordering - see #4872)
-	                // Strongly prefer to generate a forward path that preserves the order
-	                // of the members array. For multipolygons and most relations, member
-	                // order does not matter - but for routes, it does. (see #4589)
-	                // If we started this sequence backwards (i.e. next member way attaches to
-	                // the start node and not the end node), reverse the initial way before continuing.
-	                if (joinAsMembers && currWays.length === 1 && nodes[0] !== end && nodes[nodes.length - 1] !== end &&
-	                    (nodes[nodes.length - 1] === start || nodes[0] === start)
-	                ) {
-	                    currWays[0] = reverse(currWays[0]);
-	                    currNodes.reverse();
-	                    start = currNodes[0];
-	                    end = currNodes[currNodes.length - 1];
-	                }
-
-	                if (nodes[0] === end) {
-	                    fn = currNodes.push;               // join to end
-	                    nodes = nodes.slice(1);
-	                    break;
-	                } else if (nodes[nodes.length - 1] === end) {
-	                    fn = currNodes.push;               // join to end
-	                    nodes = nodes.slice(0, -1).reverse();
-	                    item = reverse(item);
-	                    break;
-	                } else if (nodes[nodes.length - 1] === start) {
-	                    fn = currNodes.unshift;            // join to beginning
-	                    nodes = nodes.slice(0, -1);
-	                    break;
-	                } else if (nodes[0] === start) {
-	                    fn = currNodes.unshift;            // join to beginning
-	                    nodes = nodes.slice(1).reverse();
-	                    item = reverse(item);
-	                    break;
-	                } else {
-	                    fn = nodes = null;
-	                }
-	            }
-
-	            if (!nodes) {     // couldn't find a joinable way/member
-	                doneSequence = true;
-	                break;
-	            }
-
-	            fn.apply(currWays, [item]);
-	            fn.apply(currNodes, nodes);
-
-	            toJoin.splice(i, 1);
-	        }
-
-	        currWays.nodes = currNodes;
-	        sequences.push(currWays);
-	    }
-
-	    return sequences;
-	}
-
-	function actionAddMember(relationId, member, memberIndex, insertPair) {
-
-	    return function action(graph) {
-	        var relation = graph.entity(relationId);
-
-	        // There are some special rules for Public Transport v2 routes.
-	        var isPTv2 = /stop|platform/.test(member.role);
-
-	        if ((isNaN(memberIndex) || insertPair) && member.type === 'way' && !isPTv2) {
-	            // Try to perform sensible inserts based on how the ways join together
-	            graph = addWayMember(relation, graph);
-	        } else {
-	            // see https://wiki.openstreetmap.org/wiki/Public_transport#Service_routes
-	            // Stops and Platforms for PTv2 should be ordered first.
-	            // hack: We do not currently have the ability to place them in the exactly correct order.
-	            if (isPTv2 && isNaN(memberIndex)) {
-	                memberIndex = 0;
-	            }
-
-	            graph = graph.replace(relation.addMember(member, memberIndex));
-	        }
-
-	        return graph;
-	    };
-
-
-	    // Add a way member into the relation "wherever it makes sense".
-	    // In this situation we were not supplied a memberIndex.
-	    function addWayMember(relation, graph) {
-	        var groups, tempWay, item, i, j, k;
-
-	        // remove PTv2 stops and platforms before doing anything.
-	        var PTv2members = [];
-	        var members = [];
-	        for (i = 0; i < relation.members.length; i++) {
-	            var m = relation.members[i];
-	            if (/stop|platform/.test(m.role)) {
-	                PTv2members.push(m);
-	            } else {
-	                members.push(m);
-	            }
-	        }
-	        relation = relation.update({ members: members });
-
-
-	        if (insertPair) {
-	            // We're adding a member that must stay paired with an existing member.
-	            // (This feature is used by `actionSplit`)
-	            //
-	            // This is tricky because the members may exist multiple times in the
-	            // member list, and with different A-B/B-A ordering and different roles.
-	            // (e.g. a bus route that loops out and back - #4589).
-	            //
-	            // Replace the existing member with a temporary way,
-	            // so that `osmJoinWays` can treat the pair like a single way.
-	            tempWay = osmWay({ id: 'wTemp', nodes: insertPair.nodes });
-	            graph = graph.replace(tempWay);
-	            var tempMember = { id: tempWay.id, type: 'way', role: member.role };
-	            var tempRelation = relation.replaceMember({id: insertPair.originalID}, tempMember, true);
-	            groups = utilArrayGroupBy(tempRelation.members, 'type');
-	            groups.way = groups.way || [];
-
-	        } else {
-	            // Add the member anywhere, one time. Just push and let `osmJoinWays` decide where to put it.
-	            groups = utilArrayGroupBy(relation.members, 'type');
-	            groups.way = groups.way || [];
-	            groups.way.push(member);
-	        }
-
-	        members = withIndex(groups.way);
-	        var joined = osmJoinWays(members, graph);
-
-	        // `joined` might not contain all of the way members,
-	        // But will contain only the completed (downloaded) members
-	        for (i = 0; i < joined.length; i++) {
-	            var segment = joined[i];
-	            var nodes = segment.nodes.slice();
-	            var startIndex = segment[0].index;
-
-	            // j = array index in `members` where this segment starts
-	            for (j = 0; j < members.length; j++) {
-	                if (members[j].index === startIndex) {
-	                    break;
-	                }
-	            }
-
-	            // k = each member in segment
-	            for (k = 0; k < segment.length; k++) {
-	                item = segment[k];
-	                var way = graph.entity(item.id);
-
-	                // If this is a paired item, generate members in correct order and role
-	                if (tempWay && item.id === tempWay.id) {
-	                    if (nodes[0].id === insertPair.nodes[0]) {
-	                        item.pair = [
-	                            { id: insertPair.originalID, type: 'way', role: item.role },
-	                            { id: insertPair.insertedID, type: 'way', role: item.role }
-	                        ];
-	                    } else {
-	                        item.pair = [
-	                            { id: insertPair.insertedID, type: 'way', role: item.role },
-	                            { id: insertPair.originalID, type: 'way', role: item.role }
-	                        ];
-	                    }
-	                }
-
-	                // reorder `members` if necessary
-	                if (k > 0) {
-	                    if (j+k >= members.length || item.index !== members[j+k].index) {
-	                        moveMember(members, item.index, j+k);
-	                    }
-	                }
-
-	                nodes.splice(0, way.nodes.length - 1);
-	            }
-	        }
-
-	        if (tempWay) {
-	            graph = graph.remove(tempWay);
-	        }
-
-	        // Final pass: skip dead items, split pairs, remove index properties
-	        var wayMembers = [];
-	        for (i = 0; i < members.length; i++) {
-	            item = members[i];
-	            if (item.index === -1) { continue; }
-
-	            if (item.pair) {
-	                wayMembers.push(item.pair[0]);
-	                wayMembers.push(item.pair[1]);
-	            } else {
-	                wayMembers.push(utilObjectOmit(item, ['index']));
-	            }
-	        }
-
-	        // Put stops and platforms first, then nodes, ways, relations
-	        // This is recommended for Public Transport v2 routes:
-	        // see https://wiki.openstreetmap.org/wiki/Public_transport#Service_routes
-	        var newMembers = PTv2members.concat( (groups.node || []), wayMembers, (groups.relation || []) );
-
-	        return graph.replace(relation.update({ members: newMembers }));
-
-
-	        // `moveMember()` changes the `members` array in place by splicing
-	        // the item with `.index = findIndex` to where it belongs,
-	        // and marking the old position as "dead" with `.index = -1`
-	        //
-	        // j=5, k=0                jk
-	        // segment                 5 4 7 6
-	        // members       0 1 2 3 4 5 6 7 8 9        keep 5 in j+k
-	        //
-	        // j=5, k=1                j k
-	        // segment                 5 4 7 6
-	        // members       0 1 2 3 4 5 6 7 8 9        move 4 to j+k
-	        // members       0 1 2 3 x 5 4 6 7 8 9      moved
-	        //
-	        // j=5, k=2                j   k
-	        // segment                 5 4 7 6
-	        // members       0 1 2 3 x 5 4 6 7 8 9      move 7 to j+k
-	        // members       0 1 2 3 x 5 4 7 6 x 8 9    moved
-	        //
-	        // j=5, k=3                j     k
-	        // segment                 5 4 7 6
-	        // members       0 1 2 3 x 5 4 7 6 x 8 9    keep 6 in j+k
-	        //
-	        function moveMember(arr, findIndex, toIndex) {
-	            for (var i = 0; i < arr.length; i++) {
-	                if (arr[i].index === findIndex) {
-	                    break;
-	                }
-	            }
-
-	            var item = Object.assign({}, arr[i]);   // shallow copy
-	            arr[i].index = -1;   // mark as dead
-	            item.index = toIndex;
-	            arr.splice(toIndex, 0, item);
-	        }
-
-
-	        // This is the same as `Relation.indexedMembers`,
-	        // Except we don't want to index all the members, only the ways
-	        function withIndex(arr) {
-	            var result = new Array(arr.length);
-	            for (var i = 0; i < arr.length; i++) {
-	                result[i] = Object.assign({}, arr[i]);   // shallow copy
-	                result[i].index = i;
-	            }
-	            return result;
-	        }
-	    }
-
-	}
-
-	function actionAddMidpoint(midpoint, node) {
-	    return function(graph) {
-	        graph = graph.replace(node.move(midpoint.loc));
-
-	        var parents = utilArrayIntersection(
-	            graph.parentWays(graph.entity(midpoint.edge[0])),
-	            graph.parentWays(graph.entity(midpoint.edge[1]))
-	        );
-
-	        parents.forEach(function(way) {
-	            for (var i = 0; i < way.nodes.length - 1; i++) {
-	                if (geoEdgeEqual([way.nodes[i], way.nodes[i + 1]], midpoint.edge)) {
-	                    graph = graph.replace(graph.entity(way.id).addNode(node.id, i + 1));
-
-	                    // Add only one midpoint on doubled-back segments,
-	                    // turning them into self-intersections.
-	                    return;
-	                }
-	            }
-	        });
-
-	        return graph;
-	    };
-	}
-
-	// https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/AddNodeToWayAction.as
-	function actionAddVertex(wayId, nodeId, index) {
-	    return function(graph) {
-	        return graph.replace(graph.entity(wayId).addNode(nodeId, index));
-	    };
-	}
-
-	function actionChangeMember(relationId, member, memberIndex) {
-	    return function(graph) {
-	        return graph.replace(graph.entity(relationId).updateMember(member, memberIndex));
-	    };
-	}
-
-	function actionChangePreset(entityID, oldPreset, newPreset, skipFieldDefaults) {
-	    return function action(graph) {
-	        var entity = graph.entity(entityID);
-	        var geometry = entity.geometry(graph);
-	        var tags = entity.tags;
-
-	        if (oldPreset) { tags = oldPreset.unsetTags(tags, geometry); }
-	        if (newPreset) { tags = newPreset.setTags(tags, geometry, skipFieldDefaults); }
-
-	        return graph.replace(entity.update({tags: tags}));
-	    };
-	}
-
-	function actionChangeTags(entityId, tags) {
-	    return function(graph) {
-	        var entity = graph.entity(entityId);
-	        return graph.replace(entity.update({tags: tags}));
-	    };
-	}
-
-	function osmNode() {
-	    if (!(this instanceof osmNode)) {
-	        return (new osmNode()).initialize(arguments);
-	    } else if (arguments.length) {
-	        this.initialize(arguments);
-	    }
-	}
-
-	osmEntity.node = osmNode;
-
-	osmNode.prototype = Object.create(osmEntity.prototype);
-
-	Object.assign(osmNode.prototype, {
-	    type: 'node',
-	    loc: [9999, 9999],
-
-	    extent: function() {
-	        return new geoExtent(this.loc);
-	    },
-
-
-	    geometry: function(graph) {
-	        return graph.transient(this, 'geometry', function() {
-	            return graph.isPoi(this) ? 'point' : 'vertex';
-	        });
-	    },
-
-
-	    move: function(loc) {
-	        return this.update({loc: loc});
-	    },
-
-
-	    isDegenerate: function() {
-	        return !(
-	            Array.isArray(this.loc) && this.loc.length === 2 &&
-	            this.loc[0] >= -180 && this.loc[0] <= 180 &&
-	            this.loc[1] >= -90 && this.loc[1] <= 90
-	        );
-	    },
-
-
-	    // Inspect tags and geometry to determine which direction(s) this node/vertex points
-	    directions: function(resolver, projection) {
-	        var val;
-	        var i;
-
-	        // which tag to use?
-	        if (this.isHighwayIntersection(resolver) && (this.tags.stop || '').toLowerCase() === 'all') {
-	            // all-way stop tag on a highway intersection
-	            val = 'all';
-	        } else {
-	            // generic direction tag
-	            val = (this.tags.direction || '').toLowerCase();
-
-	            // better suffix-style direction tag
-	            var re = /:direction$/i;
-	            var keys = Object.keys(this.tags);
-	            for (i = 0; i < keys.length; i++) {
-	                if (re.test(keys[i])) {
-	                    val = this.tags[keys[i]].toLowerCase();
-	                    break;
-	                }
-	            }
-	        }
-
-	        if (val === '') { return []; }
-
-	        var cardinal = {
-	            north: 0,               n: 0,
-	            northnortheast: 22,     nne: 22,
-	            northeast: 45,          ne: 45,
-	            eastnortheast: 67,      ene: 67,
-	            east: 90,               e: 90,
-	            eastsoutheast: 112,     ese: 112,
-	            southeast: 135,         se: 135,
-	            southsoutheast: 157,    sse: 157,
-	            south: 180,             s: 180,
-	            southsouthwest: 202,    ssw: 202,
-	            southwest: 225,         sw: 225,
-	            westsouthwest: 247,     wsw: 247,
-	            west: 270,              w: 270,
-	            westnorthwest: 292,     wnw: 292,
-	            northwest: 315,         nw: 315,
-	            northnorthwest: 337,    nnw: 337
-	        };
-
-
-	        var values = val.split(';');
-	        var results = [];
-
-	        values.forEach(function(v) {
-	            // swap cardinal for numeric directions
-	            if (cardinal[v] !== undefined) {
-	                v = cardinal[v];
-	            }
-
-	            // numeric direction - just add to results
-	            if (v !== '' && !isNaN(+v)) {
-	                results.push(+v);
-	                return;
-	            }
-
-	            // string direction - inspect parent ways
-	            var lookBackward =
-	                (this.tags['traffic_sign:backward'] || v === 'backward' || v === 'both' || v === 'all');
-	            var lookForward =
-	                (this.tags['traffic_sign:forward'] || v === 'forward' || v === 'both' || v === 'all');
-
-	            if (!lookForward && !lookBackward) { return; }
-
-	            var nodeIds = {};
-	            resolver.parentWays(this).forEach(function(parent) {
-	                var nodes = parent.nodes;
-	                for (i = 0; i < nodes.length; i++) {
-	                    if (nodes[i] === this.id) {  // match current entity
-	                        if (lookForward && i > 0) {
-	                            nodeIds[nodes[i - 1]] = true;  // look back to prev node
-	                        }
-	                        if (lookBackward && i < nodes.length - 1) {
-	                            nodeIds[nodes[i + 1]] = true;  // look ahead to next node
-	                        }
-	                    }
-	                }
-	            }, this);
-
-	            Object.keys(nodeIds).forEach(function(nodeId) {
-	                // +90 because geoAngle returns angle from X axis, not Y (north)
-	                results.push(
-	                    (geoAngle(this, resolver.entity(nodeId), projection) * (180 / Math.PI)) + 90
-	                );
-	            }, this);
-
-	        }, this);
-
-	        return utilArrayUniq(results);
-	    },
-
-
-	    isEndpoint: function(resolver) {
-	        return resolver.transient(this, 'isEndpoint', function() {
-	            var id = this.id;
-	            return resolver.parentWays(this).filter(function(parent) {
-	                return !parent.isClosed() && !!parent.affix(id);
-	            }).length > 0;
-	        });
-	    },
-
-
-	    isConnected: function(resolver) {
-	        return resolver.transient(this, 'isConnected', function() {
-	            var parents = resolver.parentWays(this);
-
-	            if (parents.length > 1) {
-	                // vertex is connected to multiple parent ways
-	                for (var i in parents) {
-	                    if (parents[i].geometry(resolver) === 'line' &&
-	                        parents[i].hasInterestingTags()) { return true; }
-	                }
-	            } else if (parents.length === 1) {
-	                var way = parents[0];
-	                var nodes = way.nodes.slice();
-	                if (way.isClosed()) { nodes.pop(); }  // ignore connecting node if closed
-
-	                // return true if vertex appears multiple times (way is self intersecting)
-	                return nodes.indexOf(this.id) !== nodes.lastIndexOf(this.id);
-	            }
-
-	            return false;
-	        });
-	    },
-
-
-	    parentIntersectionWays: function(resolver) {
-	        return resolver.transient(this, 'parentIntersectionWays', function() {
-	            return resolver.parentWays(this).filter(function(parent) {
-	                return (parent.tags.highway ||
-	                    parent.tags.waterway ||
-	                    parent.tags.railway ||
-	                    parent.tags.aeroway) &&
-	                    parent.geometry(resolver) === 'line';
-	            });
-	        });
-	    },
-
-
-	    isIntersection: function(resolver) {
-	        return this.parentIntersectionWays(resolver).length > 1;
-	    },
-
-
-	    isHighwayIntersection: function(resolver) {
-	        return resolver.transient(this, 'isHighwayIntersection', function() {
-	            return resolver.parentWays(this).filter(function(parent) {
-	                return parent.tags.highway && parent.geometry(resolver) === 'line';
-	            }).length > 1;
-	        });
-	    },
-
-
-	    isOnAddressLine: function(resolver) {
-	        return resolver.transient(this, 'isOnAddressLine', function() {
-	            return resolver.parentWays(this).filter(function(parent) {
-	                return parent.tags.hasOwnProperty('addr:interpolation') &&
-	                    parent.geometry(resolver) === 'line';
-	            }).length > 0;
-	        });
-	    },
-
-
-	    asJXON: function(changeset_id) {
-	        var r = {
-	            node: {
-	                '@id': this.osmId(),
-	                '@lon': this.loc[0],
-	                '@lat': this.loc[1],
-	                '@version': (this.version || 0),
-	                tag: Object.keys(this.tags).map(function(k) {
-	                    return { keyAttributes: { k: k, v: this.tags[k] } };
-	                }, this)
-	            }
-	        };
-	        if (changeset_id) { r.node['@changeset'] = changeset_id; }
-	        return r;
-	    },
-
-
-	    asGeoJSON: function() {
-	        return {
-	            type: 'Point',
-	            coordinates: this.loc
-	        };
-	    }
-	});
-
-	function actionCircularize(wayId, projection, maxAngle) {
-	    maxAngle = (maxAngle || 20) * Math.PI / 180;
-
-
-	    var action = function(graph, t) {
-	        if (t === null || !isFinite(t)) { t = 1; }
-	        t = Math.min(Math.max(+t, 0), 1);
-
-	        var way = graph.entity(wayId);
-	        var origNodes = {};
-
-	        graph.childNodes(way).forEach(function(node) {
-	            if (!origNodes[node.id]) { origNodes[node.id] = node; }
-	        });
-
-	        if (!way.isConvex(graph)) {
-	            graph = action.makeConvex(graph);
-	        }
-
-	        var nodes = utilArrayUniq(graph.childNodes(way));
-	        var keyNodes = nodes.filter(function(n) { return graph.parentWays(n).length !== 1; });
-	        var points = nodes.map(function(n) { return projection(n.loc); });
-	        var keyPoints = keyNodes.map(function(n) { return projection(n.loc); });
-	        var centroid = (points.length === 2) ? geoVecInterp(points[0], points[1], 0.5) : d3_polygonCentroid(points);
-	        var radius = d3_median(points, function(p) { return geoVecLength(centroid, p); });
-	        var sign = d3_polygonArea(points) > 0 ? 1 : -1;
-	        var ids, i, j, k;
-
-	        // we need at least two key nodes for the algorithm to work
-	        if (!keyNodes.length) {
-	            keyNodes = [nodes[0]];
-	            keyPoints = [points[0]];
-	        }
-
-	        if (keyNodes.length === 1) {
-	            var index = nodes.indexOf(keyNodes[0]);
-	            var oppositeIndex = Math.floor((index + nodes.length / 2) % nodes.length);
-
-	            keyNodes.push(nodes[oppositeIndex]);
-	            keyPoints.push(points[oppositeIndex]);
-	        }
-
-	        // key points and nodes are those connected to the ways,
-	        // they are projected onto the circle, in between nodes are moved
-	        // to constant intervals between key nodes, extra in between nodes are
-	        // added if necessary.
-	        for (i = 0; i < keyPoints.length; i++) {
-	            var nextKeyNodeIndex = (i + 1) % keyNodes.length;
-	            var startNode = keyNodes[i];
-	            var endNode = keyNodes[nextKeyNodeIndex];
-	            var startNodeIndex = nodes.indexOf(startNode);
-	            var endNodeIndex = nodes.indexOf(endNode);
-	            var numberNewPoints = -1;
-	            var indexRange = endNodeIndex - startNodeIndex;
-	            var nearNodes = {};
-	            var inBetweenNodes = [];
-	            var startAngle, endAngle, totalAngle, eachAngle;
-	            var angle, loc, node, origNode;
-
-	            if (indexRange < 0) {
-	                indexRange += nodes.length;
-	            }
-
-	            // position this key node
-	            var distance = geoVecLength(centroid, keyPoints[i]) || 1e-4;
-	            keyPoints[i] = [
-	                centroid[0] + (keyPoints[i][0] - centroid[0]) / distance * radius,
-	                centroid[1] + (keyPoints[i][1] - centroid[1]) / distance * radius
-	            ];
-	            loc = projection.invert(keyPoints[i]);
-	            node = keyNodes[i];
-	            origNode = origNodes[node.id];
-	            node = node.move(geoVecInterp(origNode.loc, loc, t));
-	            graph = graph.replace(node);
-
-	            // figure out the between delta angle we want to match to
-	            startAngle = Math.atan2(keyPoints[i][1] - centroid[1], keyPoints[i][0] - centroid[0]);
-	            endAngle = Math.atan2(keyPoints[nextKeyNodeIndex][1] - centroid[1], keyPoints[nextKeyNodeIndex][0] - centroid[0]);
-	            totalAngle = endAngle - startAngle;
-
-	            // detects looping around -pi/pi
-	            if (totalAngle * sign > 0) {
-	                totalAngle = -sign * (2 * Math.PI - Math.abs(totalAngle));
-	            }
-
-	            do {
-	                numberNewPoints++;
-	                eachAngle = totalAngle / (indexRange + numberNewPoints);
-	            } while (Math.abs(eachAngle) > maxAngle);
-
-
-	            // move existing nodes
-	            for (j = 1; j < indexRange; j++) {
-	                angle = startAngle + j * eachAngle;
-	                loc = projection.invert([
-	                    centroid[0] + Math.cos(angle) * radius,
-	                    centroid[1] + Math.sin(angle) * radius
-	                ]);
-
-	                node = nodes[(j + startNodeIndex) % nodes.length];
-	                origNode = origNodes[node.id];
-	                nearNodes[node.id] = angle;
-
-	                node = node.move(geoVecInterp(origNode.loc, loc, t));
-	                graph = graph.replace(node);
-	            }
-
-	            // add new in between nodes if necessary
-	            for (j = 0; j < numberNewPoints; j++) {
-	                angle = startAngle + (indexRange + j) * eachAngle;
-	                loc = projection.invert([
-	                    centroid[0] + Math.cos(angle) * radius,
-	                    centroid[1] + Math.sin(angle) * radius
-	                ]);
-
-	                // choose a nearnode to use as the original
-	                var min = Infinity;
-	                for (var nodeId in nearNodes) {
-	                    var nearAngle = nearNodes[nodeId];
-	                    var dist = Math.abs(nearAngle - angle);
-	                    if (dist < min) {
-	                        dist = min;
-	                        origNode = origNodes[nodeId];
-	                    }
-	                }
-
-	                node = osmNode({ loc: geoVecInterp(origNode.loc, loc, t) });
-	                graph = graph.replace(node);
-
-	                nodes.splice(endNodeIndex + j, 0, node);
-	                inBetweenNodes.push(node.id);
-	            }
-
-	            // Check for other ways that share these keyNodes..
-	            // If keyNodes are adjacent in both ways,
-	            // we can add inBetweenNodes to that shared way too..
-	            if (indexRange === 1 && inBetweenNodes.length) {
-	                var startIndex1 = way.nodes.lastIndexOf(startNode.id);
-	                var endIndex1 = way.nodes.lastIndexOf(endNode.id);
-	                var wayDirection1 = (endIndex1 - startIndex1);
-	                if (wayDirection1 < -1) { wayDirection1 = 1; }
-
-	                var parentWays = graph.parentWays(keyNodes[i]);
-	                for (j = 0; j < parentWays.length; j++) {
-	                    var sharedWay = parentWays[j];
-	                    if (sharedWay === way) { continue; }
-
-	                    if (sharedWay.areAdjacent(startNode.id, endNode.id)) {
-	                        var startIndex2 = sharedWay.nodes.lastIndexOf(startNode.id);
-	                        var endIndex2 = sharedWay.nodes.lastIndexOf(endNode.id);
-	                        var wayDirection2 = (endIndex2 - startIndex2);
-	                        var insertAt = endIndex2;
-	                        if (wayDirection2 < -1) { wayDirection2 = 1; }
-
-	                        if (wayDirection1 !== wayDirection2) {
-	                            inBetweenNodes.reverse();
-	                            insertAt = startIndex2;
-	                        }
-	                        for (k = 0; k < inBetweenNodes.length; k++) {
-	                            sharedWay = sharedWay.addNode(inBetweenNodes[k], insertAt + k);
-	                        }
-	                        graph = graph.replace(sharedWay);
-	                    }
-	                }
-	            }
-
-	        }
-
-	        // update the way to have all the new nodes
-	        ids = nodes.map(function(n) { return n.id; });
-	        ids.push(ids[0]);
-
-	        way = way.update({nodes: ids});
-	        graph = graph.replace(way);
-
-	        return graph;
-	    };
-
-
-	    action.makeConvex = function(graph) {
-	        var way = graph.entity(wayId);
-	        var nodes = utilArrayUniq(graph.childNodes(way));
-	        var points = nodes.map(function(n) { return projection(n.loc); });
-	        var sign = d3_polygonArea(points) > 0 ? 1 : -1;
-	        var hull = d3_polygonHull(points);
-	        var i, j;
-
-	        // D3 convex hulls go counterclockwise..
-	        if (sign === -1) {
-	            nodes.reverse();
-	            points.reverse();
-	        }
-
-	        for (i = 0; i < hull.length - 1; i++) {
-	            var startIndex = points.indexOf(hull[i]);
-	            var endIndex = points.indexOf(hull[i+1]);
-	            var indexRange = (endIndex - startIndex);
-
-	            if (indexRange < 0) {
-	                indexRange += nodes.length;
-	            }
-
-	            // move interior nodes to the surface of the convex hull..
-	            for (j = 1; j < indexRange; j++) {
-	                var point = geoVecInterp(hull[i], hull[i+1], j / indexRange);
-	                var node = nodes[(j + startIndex) % nodes.length].move(projection.invert(point));
-	                graph = graph.replace(node);
-	            }
-	        }
-	        return graph;
-	    };
-
-
-	    action.disabled = function(graph) {
-	        if (!graph.entity(wayId).isClosed()) {
-	            return 'not_closed';
-	        }
-
-	        //disable when already circular
-	        var way = graph.entity(wayId);
-	        var nodes = utilArrayUniq(graph.childNodes(way));
-	        var points = nodes.map(function(n) { return projection(n.loc); });
-	        var hull = d3_polygonHull(points);
-	        var epsilonAngle =  Math.PI / 180;
-	        if (hull.length !== points.length || hull.length < 3){
-	            return false;
-	        }
-	        var centroid = d3_polygonCentroid(points);
-	        var radius = geoVecLengthSquare(centroid, points[0]);
-
-	        // compare distances between centroid and points
-	        for (var i = 0; i<hull.length; i++){
-	            var actualPoint = hull[i];
-	            var actualDist = geoVecLengthSquare(actualPoint, centroid);
-	            var diff = Math.abs(actualDist - radius);
-	            //compare distances with epsilon-error (5%)
-	            if (diff > 0.05*radius) {
-	                return false;
-	            }
-	        }
-	        
-	        //check if central angles are smaller than maxAngle
-	        for (i = 0; i<hull.length; i++){
-	            actualPoint = hull[i];
-	            var nextPoint = hull[(i+1)%hull.length];
-	            var startAngle = Math.atan2(actualPoint[1] - centroid[1], actualPoint[0] - centroid[0]);
-	            var endAngle = Math.atan2(nextPoint[1] - centroid[1], nextPoint[0] - centroid[0]);
-	            var angle = endAngle - startAngle;
-	            if (angle < 0) {
-	                angle = -angle;
-	            }
-	            if (angle > Math.PI){
-	                angle = (2*Math.PI - angle);
-	            }
-	 
-	            if (angle > maxAngle + epsilonAngle) {
-	                return false;
-	            }
-	        }
-	        return 'already_circular';
-	    };
-
-
-	    action.transitionable = true;
-
-
-	    return action;
-	}
-
-	// https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/DeleteWayAction.as
-	function actionDeleteWay(wayID) {
-
-	    function canDeleteNode(node, graph) {
-	        // don't delete nodes still attached to ways or relations
-	        if (graph.parentWays(node).length ||
-	            graph.parentRelations(node).length) { return false; }
-
-	        var geometries = osmNodeGeometriesForTags(node.tags);
-	        // don't delete if this node can be a standalone point
-	        if (geometries.point) { return false; }
-	        // delete if this node only be a vertex
-	        if (geometries.vertex) { return true; }
-
-	        // iD doesn't know if this should be a point or vertex,
-	        // so only delete if there are no interesting tags
-	        return !node.hasInterestingTags();
-	    }
-
-
-	    var action = function(graph) {
-	        var way = graph.entity(wayID);
-
-	        graph.parentRelations(way).forEach(function(parent) {
-	            parent = parent.removeMembersWithID(wayID);
-	            graph = graph.replace(parent);
-
-	            if (parent.isDegenerate()) {
-	                graph = actionDeleteRelation(parent.id)(graph);
-	            }
-	        });
-
-	        (new Set(way.nodes)).forEach(function(nodeID) {
-	            graph = graph.replace(way.removeNode(nodeID));
-
-	            var node = graph.entity(nodeID);
-	            if (canDeleteNode(node, graph)) {
-	                graph = graph.remove(node);
-	            }
-	        });
-
-	        return graph.remove(way);
-	    };
-
-
-	    return action;
-	}
-
-	function actionDeleteMultiple(ids) {
-	    var actions = {
-	        way: actionDeleteWay,
-	        node: actionDeleteNode,
-	        relation: actionDeleteRelation
-	    };
-
-
-	    var action = function(graph) {
-	        ids.forEach(function(id) {
-	            if (graph.hasEntity(id)) { // It may have been deleted already.
-	                graph = actions[graph.entity(id).type](id)(graph);
-	            }
-	        });
-
-	        return graph;
-	    };
-
-
-	    return action;
-	}
-
-	// https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/DeleteRelationAction.as
-	function actionDeleteRelation(relationID, allowUntaggedMembers) {
-
-	    function canDeleteEntity(entity, graph) {
-	        return !graph.parentWays(entity).length &&
-	            !graph.parentRelations(entity).length &&
-	            (!entity.hasInterestingTags() && !allowUntaggedMembers);
-	    }
-
-
-	    var action = function(graph) {
-	        var relation = graph.entity(relationID);
-
-	        graph.parentRelations(relation)
-	            .forEach(function(parent) {
-	                parent = parent.removeMembersWithID(relationID);
-	                graph = graph.replace(parent);
-
-	                if (parent.isDegenerate()) {
-	                    graph = actionDeleteRelation(parent.id)(graph);
-	                }
-	            });
-
-	        var memberIDs = utilArrayUniq(relation.members.map(function(m) { return m.id; }));
-	        memberIDs.forEach(function(memberID) {
-	            graph = graph.replace(relation.removeMembersWithID(memberID));
-
-	            var entity = graph.entity(memberID);
-	            if (canDeleteEntity(entity, graph)) {
-	                graph = actionDeleteMultiple([memberID])(graph);
-	            }
-	        });
-
-	        return graph.remove(relation);
-	    };
-
-
-	    return action;
-	}
-
-	// https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/DeleteNodeAction.as
-	function actionDeleteNode(nodeId) {
-	    var action = function(graph) {
-	        var node = graph.entity(nodeId);
-
-	        graph.parentWays(node)
-	            .forEach(function(parent) {
-	                parent = parent.removeNode(nodeId);
-	                graph = graph.replace(parent);
-
-	                if (parent.isDegenerate()) {
-	                    graph = actionDeleteWay(parent.id)(graph);
-	                }
-	            });
-
-	        graph.parentRelations(node)
-	            .forEach(function(parent) {
-	                parent = parent.removeMembersWithID(nodeId);
-	                graph = graph.replace(parent);
-
-	                if (parent.isDegenerate()) {
-	                    graph = actionDeleteRelation(parent.id)(graph);
-	                }
-	            });
-
-	        return graph.remove(node);
-	    };
-
-
-	    return action;
-	}
-
-	// Connect the ways at the given nodes.
-	//
-	// First choose a node to be the survivor, with preference given
-	// to an existing (not new) node.
-	//
-	// Tags and relation memberships of of non-surviving nodes are merged
-	// to the survivor.
-	//
-	// This is the inverse of `iD.actionDisconnect`.
-	//
-	// Reference:
-	//   https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MergeNodesAction.as
-	//   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/MergeNodesAction.java
-	//
-	function actionConnect(nodeIDs) {
-	    var action = function(graph) {
-	        var survivor;
-	        var node;
-	        var parents;
-	        var i, j;
-
-	        // Choose a survivor node, prefer an existing (not new) node - #4974
-	        for (i = 0; i < nodeIDs.length; i++) {
-	            survivor = graph.entity(nodeIDs[i]);
-	            if (survivor.version) { break; }  // found one
-	        }
-
-	        // Replace all non-surviving nodes with the survivor and merge tags.
-	        for (i = 0; i < nodeIDs.length; i++) {
-	            node = graph.entity(nodeIDs[i]);
-	            if (node.id === survivor.id) { continue; }
-
-	            parents = graph.parentWays(node);
-	            for (j = 0; j < parents.length; j++) {
-	                graph = graph.replace(parents[j].replaceNode(node.id, survivor.id));
-	            }
-
-	            parents = graph.parentRelations(node);
-	            for (j = 0; j < parents.length; j++) {
-	                graph = graph.replace(parents[j].replaceMember(node, survivor));
-	            }
-
-	            survivor = survivor.mergeTags(node.tags);
-	            graph = actionDeleteNode(node.id)(graph);
-	        }
-
-	        graph = graph.replace(survivor);
-
-	        // find and delete any degenerate ways created by connecting adjacent vertices
-	        parents = graph.parentWays(survivor);
-	        for (i = 0; i < parents.length; i++) {
-	            if (parents[i].isDegenerate()) {
-	                graph = actionDeleteWay(parents[i].id)(graph);
-	            }
-	        }
-
-	        return graph;
-	    };
-
-
-	    action.disabled = function(graph) {
-	        var seen = {};
-	        var restrictionIDs = [];
-	        var survivor;
-	        var node, way;
-	        var relations, relation, role;
-	        var i, j, k;
-
-	        // Choose a survivor node, prefer an existing (not new) node - #4974
-	        for (i = 0; i < nodeIDs.length; i++) {
-	            survivor = graph.entity(nodeIDs[i]);
-	            if (survivor.version) { break; }  // found one
-	        }
-
-	        // 1. disable if the nodes being connected have conflicting relation roles
-	        for (i = 0; i < nodeIDs.length; i++) {
-	            node = graph.entity(nodeIDs[i]);
-	            relations = graph.parentRelations(node);
-
-	            for (j = 0; j < relations.length; j++) {
-	                relation = relations[j];
-	                role = relation.memberById(node.id).role || '';
-
-	                // if this node is a via node in a restriction, remember for later
-	                if (relation.hasFromViaTo()) {
-	                    restrictionIDs.push(relation.id);
-	                }
-
-	                if (seen[relation.id] !== undefined && seen[relation.id] !== role) {
-	                    return 'relation';
-	                } else {
-	                    seen[relation.id] = role;
-	                }
-	            }
-	        }
-
-	        // gather restrictions for parent ways
-	        for (i = 0; i < nodeIDs.length; i++) {
-	            node = graph.entity(nodeIDs[i]);
-
-	            var parents = graph.parentWays(node);
-	            for (j = 0; j < parents.length; j++) {
-	                var parent = parents[j];
-	                relations = graph.parentRelations(parent);
-
-	                for (k = 0; k < relations.length; k++) {
-	                    relation = relations[k];
-	                    if (relation.hasFromViaTo()) {
-	                        restrictionIDs.push(relation.id);
-	                    }
-	                }
-	            }
-	        }
-
-
-	        // test restrictions
-	        restrictionIDs = utilArrayUniq(restrictionIDs);
-	        for (i = 0; i < restrictionIDs.length; i++) {
-	            relation = graph.entity(restrictionIDs[i]);
-	            if (!relation.isComplete(graph)) { continue; }
-
-	            var memberWays = relation.members
-	                .filter(function(m) { return m.type === 'way'; })
-	                .map(function(m) { return graph.entity(m.id); });
-
-	            memberWays = utilArrayUniq(memberWays);
-	            var f = relation.memberByRole('from');
-	            var t = relation.memberByRole('to');
-	            var isUturn = (f.id === t.id);
-
-	            // 2a. disable if connection would damage a restriction
-	            // (a key node is a node at the junction of ways)
-	            var nodes = { from: [], via: [], to: [], keyfrom: [], keyto: [] };
-	            for (j = 0; j < relation.members.length; j++) {
-	                collectNodes(relation.members[j], nodes);
-	            }
-
-	            nodes.keyfrom = utilArrayUniq(nodes.keyfrom.filter(hasDuplicates));
-	            nodes.keyto = utilArrayUniq(nodes.keyto.filter(hasDuplicates));
-
-	            var filter = keyNodeFilter(nodes.keyfrom, nodes.keyto);
-	            nodes.from = nodes.from.filter(filter);
-	            nodes.via = nodes.via.filter(filter);
-	            nodes.to = nodes.to.filter(filter);
-
-	            var connectFrom = false;
-	            var connectVia = false;
-	            var connectTo = false;
-	            var connectKeyFrom = false;
-	            var connectKeyTo = false;
-
-	            for (j = 0; j < nodeIDs.length; j++) {
-	                var n = nodeIDs[j];
-	                if (nodes.from.indexOf(n) !== -1)    { connectFrom = true; }
-	                if (nodes.via.indexOf(n) !== -1)     { connectVia = true; }
-	                if (nodes.to.indexOf(n) !== -1)      { connectTo = true; }
-	                if (nodes.keyfrom.indexOf(n) !== -1) { connectKeyFrom = true; }
-	                if (nodes.keyto.indexOf(n) !== -1)   { connectKeyTo = true; }
-	            }
-	            if (connectFrom && connectTo && !isUturn) { return 'restriction'; }
-	            if (connectFrom && connectVia) { return 'restriction'; }
-	            if (connectTo   && connectVia) { return 'restriction'; }
-
-	            // connecting to a key node -
-	            // if both nodes are on a member way (i.e. part of the turn restriction),
-	            // the connecting node must be adjacent to the key node.
-	            if (connectKeyFrom || connectKeyTo) {
-	                if (nodeIDs.length !== 2) { return 'restriction'; }
-
-	                var n0 = null;
-	                var n1 = null;
-	                for (j = 0; j < memberWays.length; j++) {
-	                    way = memberWays[j];
-	                    if (way.contains(nodeIDs[0])) { n0 = nodeIDs[0]; }
-	                    if (way.contains(nodeIDs[1])) { n1 = nodeIDs[1]; }
-	                }
-
-	                if (n0 && n1) {    // both nodes are part of the restriction
-	                    var ok = false;
-	                    for (j = 0; j < memberWays.length; j++) {
-	                        way = memberWays[j];
-	                        if (way.areAdjacent(n0, n1)) {
-	                            ok = true;
-	                            break;
-	                        }
-	                    }
-	                    if (!ok) {
-	                        return 'restriction';
-	                    }
-	                }
-	            }
-
-	            // 2b. disable if nodes being connected will destroy a member way in a restriction
-	            // (to test, make a copy and try actually connecting the nodes)
-	            for (j = 0; j < memberWays.length; j++) {
-	                way = memberWays[j].update({});   // make copy
-	                for (k = 0; k < nodeIDs.length; k++) {
-	                    if (nodeIDs[k] === survivor.id) { continue; }
-
-	                    if (way.areAdjacent(nodeIDs[k], survivor.id)) {
-	                        way = way.removeNode(nodeIDs[k]);
-	                    } else {
-	                        way = way.replaceNode(nodeIDs[k], survivor.id);
-	                    }
-	                }
-	                if (way.isDegenerate()) {
-	                    return 'restriction';
-	                }
-	            }
-	        }
-
-	        return false;
-
-
-	        // if a key node appears multiple times (indexOf !== lastIndexOf) it's a FROM-VIA or TO-VIA junction
-	        function hasDuplicates(n, i, arr) {
-	            return arr.indexOf(n) !== arr.lastIndexOf(n);
-	        }
-
-	        function keyNodeFilter(froms, tos) {
-	            return function(n) {
-	                return froms.indexOf(n) === -1 && tos.indexOf(n) === -1;
-	            };
-	        }
-
-	        function collectNodes(member, collection) {
-	            var entity = graph.hasEntity(member.id);
-	            if (!entity) { return; }
-
-	            var role = member.role || '';
-	            if (!collection[role]) {
-	                collection[role] = [];
-	            }
-
-	            if (member.type === 'node') {
-	                collection[role].push(member.id);
-	                if (role === 'via') {
-	                    collection.keyfrom.push(member.id);
-	                    collection.keyto.push(member.id);
-	                }
-
-	            } else if (member.type === 'way') {
-	                collection[role].push.apply(collection[role], entity.nodes);
-	                if (role === 'from' || role === 'via') {
-	                    collection.keyfrom.push(entity.first());
-	                    collection.keyfrom.push(entity.last());
-	                }
-	                if (role === 'to' || role === 'via') {
-	                    collection.keyto.push(entity.first());
-	                    collection.keyto.push(entity.last());
-	                }
-	            }
-	        }
-	    };
-
-
-	    return action;
-	}
-
-	function actionCopyEntities(ids, fromGraph) {
-	    var _copies = {};
-
-
-	    var action = function(graph) {
-	        ids.forEach(function(id) {
-	            fromGraph.entity(id).copy(fromGraph, _copies);
-	        });
-
-	        for (var id in _copies) {
-	            graph = graph.replace(_copies[id]);
-	        }
-
-	        return graph;
-	    };
-
-
-	    action.copies = function() {
-	        return _copies;
-	    };
-
-
-	    return action;
-	}
-
-	function actionDeleteMember(relationId, memberIndex) {
-	    return function(graph) {
-	        var relation = graph.entity(relationId)
-	            .removeMember(memberIndex);
-
-	        graph = graph.replace(relation);
-
-	        if (relation.isDegenerate())
-	            { graph = actionDeleteRelation(relation.id)(graph); }
-
-	        return graph;
-	    };
-	}
-
-	function actionDiscardTags(difference, discardTags) {
-	  discardTags = discardTags || {};
-
-	  return function (graph) {
-	    difference.modified().forEach(checkTags);
-	    difference.created().forEach(checkTags);
-	    return graph;
-
-	    function checkTags(entity) {
-	      var keys = Object.keys(entity.tags);
-	      var didDiscard = false;
-	      var tags = {};
-
-	      for (var i = 0; i < keys.length; i++) {
-	        var k = keys[i];
-	        if (discardTags[k] || !entity.tags[k]) {
-	          didDiscard = true;
-	        } else {
-	          tags[k] = entity.tags[k];
-	        }
-	      }
-	      if (didDiscard) {
-	        graph = graph.replace(entity.update({ tags: tags }));
-	      }
-	    }
-
-	  };
-	}
-
-	// Disconnect the ways at the given node.
-	//
-	// Optionally, disconnect only the given ways.
-	//
-	// For testing convenience, accepts an ID to assign to the (first) new node.
-	// Normally, this will be undefined and the way will automatically
-	// be assigned a new ID.
-	//
-	// This is the inverse of `iD.actionConnect`.
-	//
-	// Reference:
-	//   https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/UnjoinNodeAction.as
-	//   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/UnGlueAction.java
-	//
-	function actionDisconnect(nodeId, newNodeId) {
-	    var wayIds;
-
-
-	    var action = function(graph) {
-	        var node = graph.entity(nodeId);
-	        var connections = action.connections(graph);
-
-	        connections.forEach(function(connection) {
-	            var way = graph.entity(connection.wayID);
-	            var newNode = osmNode({id: newNodeId, loc: node.loc, tags: node.tags});
-
-	            graph = graph.replace(newNode);
-	            if (connection.index === 0 && way.isArea()) {
-	                // replace shared node with shared node..
-	                graph = graph.replace(way.replaceNode(way.nodes[0], newNode.id));
-	            } else if (way.isClosed() && connection.index === way.nodes.length - 1) {
-	                // replace closing node with new new node..
-	                graph = graph.replace(way.unclose().addNode(newNode.id));
-	            } else {
-	                // replace shared node with multiple new nodes..
-	                graph = graph.replace(way.updateNode(newNode.id, connection.index));
-	            }
-	        });
-
-	        return graph;
-	    };
-
-
-	    action.connections = function(graph) {
-	        var candidates = [];
-	        var keeping = false;
-	        var parentWays = graph.parentWays(graph.entity(nodeId));
-	        var way, waynode;
-	        for (var i = 0; i < parentWays.length; i++) {
-	            way = parentWays[i];
-	            if (wayIds && wayIds.indexOf(way.id) === -1) {
-	                keeping = true;
-	                continue;
-	            }
-	            if (way.isArea() && (way.nodes[0] === nodeId)) {
-	                candidates.push({ wayID: way.id, index: 0 });
-	            } else {
-	                for (var j = 0; j < way.nodes.length; j++) {
-	                    waynode = way.nodes[j];
-	                    if (waynode === nodeId) {
-	                        if (way.isClosed() &&
-	                            parentWays.length > 1 &&
-	                            wayIds &&
-	                            wayIds.indexOf(way.id) !== -1 &&
-	                            j === way.nodes.length - 1) {
-	                            continue;
-	                        }
-	                        candidates.push({ wayID: way.id, index: j });
-	                    }
-	                }
-	            }
-	        }
-
-	        return keeping ? candidates : candidates.slice(1);
-	    };
-
-
-	    action.disabled = function(graph) {
-	        var connections = action.connections(graph);
-	        if (connections.length === 0)
-	            { return 'not_connected'; }
-
-	        var parentWays = graph.parentWays(graph.entity(nodeId));
-	        var seenRelationIds = {};
-	        var sharedRelation;
-
-	        parentWays.forEach(function(way) {
-	            var relations = graph.parentRelations(way);
-	            relations.forEach(function(relation) {
-	                if (relation.id in seenRelationIds) {
-	                    if (wayIds) {
-	                        if (wayIds.indexOf(way.id) !== -1 ||
-	                            wayIds.indexOf(seenRelationIds[relation.id]) !== -1) {
-	                            sharedRelation = relation;
-	                        }
-	                    } else {
-	                        sharedRelation = relation;
-	                    }
-	                } else {
-	                    seenRelationIds[relation.id] = way.id;
-	                }
-	            });
-	        });
-
-	        if (sharedRelation)
-	            { return 'relation'; }
-	    };
-
-
-	    action.limitWays = function(val) {
-	        if (!arguments.length) { return wayIds; }
-	        wayIds = val;
-	        return action;
-	    };
-
-
-	    return action;
-	}
-
-	function actionExtract(entityID) {
-
-	    var extractedNodeID;
-
-	    var action = function(graph) {
-	        var entity = graph.entity(entityID);
-
-	        if (entity.type === 'node') {
-	            return extractFromNode(entity, graph);
-	        }
-
-	        return extractFromWayOrRelation(entity, graph);
-	    };
-
-	    function extractFromNode(node, graph) {
-
-	        extractedNodeID = node.id;
-
-	        // Create a new node to replace the one we will detach
-	        var replacement = osmNode({ loc: node.loc });
-	        graph = graph.replace(replacement);
-
-	        // Process each way in turn, updating the graph as we go
-	        graph = graph.parentWays(node)
-	            .reduce(function(accGraph, parentWay) {
-	                return accGraph.replace(parentWay.replaceNode(entityID, replacement.id));
-	            }, graph);
-
-	        // Process any relations too
-	        return graph.parentRelations(node)
-	            .reduce(function(accGraph, parentRel) {
-	                return accGraph.replace(parentRel.replaceMember(node, replacement));
-	            }, graph);
-	    }
-
-	    function extractFromWayOrRelation(entity, graph) {
-
-	        var fromGeometry = entity.geometry(graph);
-
-	        var keysToCopyAndRetain = ['source', 'wheelchair'];
-	        var keysToRetain = ['area'];
-	        var buildingKeysToRetain = ['architect', 'building', 'height', 'layer'];
-
-	        var extractedLoc = d3_geoCentroid(entity.asGeoJSON(graph));
-	        if (!extractedLoc  || !isFinite(extractedLoc[0]) || !isFinite(extractedLoc[1])) {
-	            extractedLoc = entity.extent(graph).center();
-	        }
-
-	        var indoorAreaValues = {
-	            area: true,
-	            corridor: true,
-	            elevator: true,
-	            level: true,
-	            room: true
-	        };
-
-	        var isBuilding = (entity.tags.building && entity.tags.building !== 'no') ||
-	            (entity.tags['building:part'] && entity.tags['building:part'] !== 'no');
-
-	        var isIndoorArea = fromGeometry === 'area' && entity.tags.indoor && indoorAreaValues[entity.tags.indoor];
-
-	        var entityTags = Object.assign({}, entity.tags);  // shallow copy
-	        var pointTags = {};
-	        for (var key in entityTags) {
-
-	            if (entity.type === 'relation' &&
-	                key === 'type') {
-	                continue;
-	            }
-
-	            if (keysToRetain.indexOf(key) !== -1) {
-	                continue;
-	            }
-
-	            if (isBuilding) {
-	                // don't transfer building-related tags
-	                if (buildingKeysToRetain.indexOf(key) !== -1 ||
-	                    key.match(/^building:.{1,}/) ||
-	                    key.match(/^roof:.{1,}/)) { continue; }
-	            }
-	            // leave `indoor` tag on the area
-	            if (isIndoorArea && key === 'indoor') {
-	                continue;
-	            }
-
-	            // copy the tag from the entity to the point
-	            pointTags[key] = entityTags[key];
-
-	            // leave addresses and some other tags so they're on both features
-	            if (keysToCopyAndRetain.indexOf(key) !== -1 ||
-	                key.match(/^addr:.{1,}/)) {
-	                continue;
-	            } else if (isIndoorArea && key === 'level') {
-	                // leave `level` on both features
-	                continue;
-	            }
-
-	            // remove the tag from the entity
-	            delete entityTags[key];
-	        }
-
-	        if (!isBuilding && !isIndoorArea && fromGeometry === 'area') {
-	            // ensure that areas keep area geometry
-	            entityTags.area = 'yes';
-	        }
-
-	        var replacement = osmNode({ loc: extractedLoc, tags: pointTags });
-	        graph = graph.replace(replacement);
-
-	        extractedNodeID = replacement.id;
-
-	        return graph.replace(entity.update({tags: entityTags}));
-	    }
-
-	    action.getExtractedNodeID = function() {
-	        return extractedNodeID;
-	    };
-
-	    return action;
-	}
-
-	// Join ways at the end node they share.
-	//
-	// This is the inverse of `iD.actionSplit`.
-	//
-	// Reference:
-	//   https://github.com/systemed/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MergeWaysAction.as
-	//   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/CombineWayAction.java
-	//
-	function actionJoin(ids) {
-
-	    function groupEntitiesByGeometry(graph) {
-	        var entities = ids.map(function(id) { return graph.entity(id); });
-	        return Object.assign(
-	            { line: [] },
-	            utilArrayGroupBy(entities, function(entity) { return entity.geometry(graph); })
-	        );
-	    }
-
-
-	    var action = function(graph) {
-	        var ways = ids.map(graph.entity, graph);
-	        var survivorID = ways[0].id;
-
-	        // if any of the ways are sided (e.g. coastline, cliff, kerb)
-	        // sort them first so they establish the overall order - #6033
-	        ways.sort(function(a, b) {
-	            var aSided = a.isSided();
-	            var bSided = b.isSided();
-	            return (aSided && !bSided) ? -1
-	                : (bSided && !aSided) ? 1
-	                : 0;
-	        });
-
-	        // Prefer to keep an existing way.
-	        for (var i = 0; i < ways.length; i++) {
-	            if (!ways[i].isNew()) {
-	                survivorID = ways[i].id;
-	                break;
-	            }
-	        }
-
-	        var sequences = osmJoinWays(ways, graph);
-	        var joined = sequences[0];
-
-	        // We might need to reverse some of these ways before joining them.  #4688
-	        // `joined.actions` property will contain any actions we need to apply.
-	        graph = sequences.actions.reduce(function(g, action) { return action(g); }, graph);
-
-	        var survivor = graph.entity(survivorID);
-	        survivor = survivor.update({ nodes: joined.nodes.map(function(n) { return n.id; }) });
-	        graph = graph.replace(survivor);
-
-	        joined.forEach(function(way) {
-	            if (way.id === survivorID) { return; }
-
-	            graph.parentRelations(way).forEach(function(parent) {
-	                graph = graph.replace(parent.replaceMember(way, survivor));
-	            });
-
-	            survivor = survivor.mergeTags(way.tags);
-
-	            graph = graph.replace(survivor);
-	            graph = actionDeleteWay(way.id)(graph);
-	        });
-
-	        // Finds if the join created a single-member multipolygon,
-	        // and if so turns it into a basic area instead
-	        function checkForSimpleMultipolygon() {
-	            if (!survivor.isClosed()) { return; }
-
-	            var multipolygons = graph.parentMultipolygons(survivor).filter(function(multipolygon) {
-	                // find multipolygons where the survivor is the only member
-	                return multipolygon.members.length === 1;
-	            });
-
-	            // skip if this is the single member of multiple multipolygons
-	            if (multipolygons.length !== 1) { return; }
-
-	            var multipolygon = multipolygons[0];
-
-	            for (var key in survivor.tags) {
-	                if (multipolygon.tags[key] &&
-	                    // don't collapse if tags cannot be cleanly merged
-	                    multipolygon.tags[key] !== survivor.tags[key]) { return; }
-	            }
-
-	            survivor = survivor.mergeTags(multipolygon.tags);
-	            graph = graph.replace(survivor);
-	            graph = actionDeleteRelation(multipolygon.id, true /* allow untagged members */)(graph);
-
-	            var tags = Object.assign({}, survivor.tags);
-	            if (survivor.geometry(graph) !== 'area') {
-	                // ensure the feature persists as an area
-	                tags.area = 'yes';
-	            }
-	            delete tags.type; // remove type=multipolygon
-	            survivor = survivor.update({ tags: tags });
-	            graph = graph.replace(survivor);
-	        }
-	        checkForSimpleMultipolygon();
-
-	        return graph;
-	    };
-
-	    // Returns the number of nodes the resultant way is expected to have
-	    action.resultingWayNodesLength = function(graph) {
-	        return ids.reduce(function(count, id) {
-	            return count + graph.entity(id).nodes.length;
-	        }, 0) - ids.length - 1;
-	    };
-
-
-	    action.disabled = function(graph) {
-	        var geometries = groupEntitiesByGeometry(graph);
-	        if (ids.length < 2 || ids.length !== geometries.line.length) {
-	            return 'not_eligible';
-	        }
-
-	        var joined = osmJoinWays(ids.map(graph.entity, graph), graph);
-	        if (joined.length > 1) {
-	            return 'not_adjacent';
-	        }
-
-	        // Loop through all combinations of path-pairs
-	        // to check potential intersections between all pairs
-	        for (var i = 0; i < ids.length - 1; i++) {
-	            for (var j = i + 1; j < ids.length; j++) {
-	                var path1 = graph.childNodes(graph.entity(ids[i]))
-	                    .map(function(e) { return e.loc; });
-	                var path2 = graph.childNodes(graph.entity(ids[j]))
-	                    .map(function(e) { return e.loc; });
-	                var intersections = geoPathIntersections(path1, path2);
-
-	                // Check if intersections are just nodes lying on top of
-	                // each other/the line, as opposed to crossing it
-	                var common = utilArrayIntersection(
-	                    joined[0].nodes.map(function(n) { return n.loc.toString(); }),
-	                    intersections.map(function(n) { return n.toString(); })
-	                );
-	                if (common.length !== intersections.length) {
-	                    return 'paths_intersect';
-	                }
-	            }
-	        }
-
-	        var nodeIds = joined[0].nodes.map(function(n) { return n.id; }).slice(1, -1);
-	        var relation;
-	        var tags = {};
-	        var conflicting = false;
-
-	        joined[0].forEach(function(way) {
-	            var parents = graph.parentRelations(way);
-	            parents.forEach(function(parent) {
-	                if (parent.isRestriction() && parent.members.some(function(m) { return nodeIds.indexOf(m.id) >= 0; })) {
-	                    relation = parent;
-	                }
-	            });
-
-	            for (var k in way.tags) {
-	                if (!(k in tags)) {
-	                    tags[k] = way.tags[k];
-	                } else if (tags[k] && osmIsInterestingTag(k) && tags[k] !== way.tags[k]) {
-	                    conflicting = true;
-	                }
-	            }
-	        });
-
-	        if (relation) {
-	            return 'restriction';
-	        }
-
-	        if (conflicting) {
-	            return 'conflicting_tags';
-	        }
-	    };
-
-
-	    return action;
-	}
-
-	function actionMerge(ids) {
-
-	    function groupEntitiesByGeometry(graph) {
-	        var entities = ids.map(function(id) { return graph.entity(id); });
-	        return Object.assign(
-	            { point: [], area: [], line: [], relation: [] },
-	            utilArrayGroupBy(entities, function(entity) { return entity.geometry(graph); })
-	        );
-	    }
-
-
-	    var action = function(graph) {
-	        var geometries = groupEntitiesByGeometry(graph);
-	        var target = geometries.area[0] || geometries.line[0];
-	        var points = geometries.point;
-
-	        points.forEach(function(point) {
-	            target = target.mergeTags(point.tags);
-	            graph = graph.replace(target);
-
-	            graph.parentRelations(point).forEach(function(parent) {
-	                graph = graph.replace(parent.replaceMember(point, target));
-	            });
-
-	            var nodes = utilArrayUniq(graph.childNodes(target));
-	            var removeNode = point;
-
-	            for (var i = 0; i < nodes.length; i++) {
-	                var node = nodes[i];
-	                if (graph.parentWays(node).length > 1 ||
-	                    graph.parentRelations(node).length ||
-	                    node.hasInterestingTags()) {
-	                    continue;
-	                }
-
-	                // Found an uninteresting child node on the target way.
-	                // Move orig point into its place to preserve point's history. #3683
-	                graph = graph.replace(point.update({ tags: {}, loc: node.loc }));
-	                target = target.replaceNode(node.id, point.id);
-	                graph = graph.replace(target);
-	                removeNode = node;
-	                break;
-	            }
-
-	            graph = graph.remove(removeNode);
-	        });
-
-	        if (target.tags.area === 'yes') {
-	            var tags = Object.assign({}, target.tags); // shallow copy
-	            delete tags.area;
-	            if (osmTagSuggestingArea(tags)) {
-	                // remove the `area` tag if area geometry is now implied - #3851
-	                target = target.update({ tags: tags });
-	                graph = graph.replace(target);
-	            }
-	        }
-
-	        return graph;
-	    };
-
-
-	    action.disabled = function(graph) {
-	        var geometries = groupEntitiesByGeometry(graph);
-	        if (geometries.point.length === 0 ||
-	            (geometries.area.length + geometries.line.length) !== 1 ||
-	            geometries.relation.length !== 0) {
-	            return 'not_eligible';
-	        }
-	    };
-
-
-	    return action;
-	}
-
-	// `actionMergeNodes` is just a combination of:
-	//
-	// 1. move all the nodes to a common location
-	// 2. `actionConnect` them
-
-	function actionMergeNodes(nodeIDs, loc) {
-
-	    // If there is a single "interesting" node, use that as the location.
-	    // Otherwise return the average location of all the nodes.
-	    function chooseLoc(graph) {
-	        if (!nodeIDs.length) { return null; }
-	        var sum = [0,0];
-	        var interestingCount = 0;
-	        var interestingLoc;
-
-	        for (var i = 0; i < nodeIDs.length; i++) {
-	            var node = graph.entity(nodeIDs[i]);
-	            if (node.hasInterestingTags()) {
-	                interestingLoc = (++interestingCount === 1) ? node.loc : null;
-	            }
-	            sum = geoVecAdd(sum, node.loc);
-	        }
-
-	        return interestingLoc || geoVecScale(sum, 1 / nodeIDs.length);
-	    }
-
-
-	    var action = function(graph) {
-	        if (nodeIDs.length < 2) { return graph; }
-	        var toLoc = loc;
-	        if (!toLoc) {
-	            toLoc = chooseLoc(graph);
-	        }
-
-	        for (var i = 0; i < nodeIDs.length; i++) {
-	            var node = graph.entity(nodeIDs[i]);
-	            if (node.loc !== toLoc) {
-	                graph = graph.replace(node.move(toLoc));
-	            }
-	        }
-
-	        return actionConnect(nodeIDs)(graph);
-	    };
-
-
-	    action.disabled = function(graph) {
-	        if (nodeIDs.length < 2) { return 'not_eligible'; }
-
-	        for (var i = 0; i < nodeIDs.length; i++) {
-	            var entity = graph.entity(nodeIDs[i]);
-	            if (entity.type !== 'node') { return 'not_eligible'; }
-	        }
-
-	        return actionConnect(nodeIDs).disabled(graph);
-	    };
-
-	    return action;
-	}
-
-	function osmChangeset() {
-	    if (!(this instanceof osmChangeset)) {
-	        return (new osmChangeset()).initialize(arguments);
-	    } else if (arguments.length) {
-	        this.initialize(arguments);
-	    }
-	}
-
-
-	osmEntity.changeset = osmChangeset;
-
-	osmChangeset.prototype = Object.create(osmEntity.prototype);
-
-	Object.assign(osmChangeset.prototype, {
-
-	    type: 'changeset',
-
-
-	    extent: function() {
-	        return new geoExtent();
-	    },
-
-
-	    geometry: function() {
-	        return 'changeset';
-	    },
-
-
-	    asJXON: function() {
-	        return {
-	            osm: {
-	                changeset: {
-	                    tag: Object.keys(this.tags).map(function(k) {
-	                        return { '@k': k, '@v': this.tags[k] };
-	                    }, this),
-	                    '@version': 0.6,
-	                    '@generator': 'iD'
-	                }
-	            }
-	        };
-	    },
-
-
-	    // Generate [osmChange](http://wiki.openstreetmap.org/wiki/OsmChange)
-	    // XML. Returns a string.
-	    osmChangeJXON: function(changes) {
-	        var changeset_id = this.id;
-
-	        function nest(x, order) {
-	            var groups = {};
-	            for (var i = 0; i < x.length; i++) {
-	                var tagName = Object.keys(x[i])[0];
-	                if (!groups[tagName]) { groups[tagName] = []; }
-	                groups[tagName].push(x[i][tagName]);
-	            }
-	            var ordered = {};
-	            order.forEach(function(o) {
-	                if (groups[o]) { ordered[o] = groups[o]; }
-	            });
-	            return ordered;
-	        }
-
-
-	        // sort relations in a changeset by dependencies
-	        function sort(changes) {
-
-	            // find a referenced relation in the current changeset
-	            function resolve(item) {
-	                return relations.find(function(relation) {
-	                    return item.keyAttributes.type === 'relation'
-	                        && item.keyAttributes.ref === relation['@id'];
-	                });
-	            }
-
-	            // a new item is an item that has not been already processed
-	            function isNew(item) {
-	                return !sorted[ item['@id'] ] && !processing.find(function(proc) {
-	                    return proc['@id'] === item['@id'];
-	                });
-	            }
-
-	            var processing = [];
-	            var sorted = {};
-	            var relations = changes.relation;
-
-	            if (!relations) { return changes; }
-
-	            for (var i = 0; i < relations.length; i++) {
-	                var relation = relations[i];
-
-	                // skip relation if already sorted
-	                if (!sorted[relation['@id']]) {
-	                    processing.push(relation);
-	                }
-
-	                while (processing.length > 0) {
-	                    var next = processing[0],
-	                    deps = next.member.map(resolve).filter(Boolean).filter(isNew);
-	                    if (deps.length === 0) {
-	                        sorted[next['@id']] = next;
-	                        processing.shift();
-	                    } else {
-	                        processing = deps.concat(processing);
-	                    }
-	                }
-	            }
-
-	            changes.relation = Object.values(sorted);
-	            return changes;
-	        }
-
-	        function rep(entity) {
-	            return entity.asJXON(changeset_id);
-	        }
-
-	        return {
-	            osmChange: {
-	                '@version': 0.6,
-	                '@generator': 'iD',
-	                'create': sort(nest(changes.created.map(rep), ['node', 'way', 'relation'])),
-	                'modify': nest(changes.modified.map(rep), ['node', 'way', 'relation']),
-	                'delete': Object.assign(nest(changes.deleted.map(rep), ['relation', 'way', 'node']), { '@if-unused': true })
-	            }
-	        };
-	    },
-
-
-	    asGeoJSON: function() {
-	        return {};
-	    }
-
-	});
-
-	function osmNote() {
-	    if (!(this instanceof osmNote)) {
-	        return (new osmNote()).initialize(arguments);
-	    } else if (arguments.length) {
-	        this.initialize(arguments);
-	    }
-	}
-
-
-	osmNote.id = function() {
-	    return osmNote.id.next--;
-	};
-
-
-	osmNote.id.next = -1;
-
-
-	Object.assign(osmNote.prototype, {
-
-	    type: 'note',
-
-	    initialize: function(sources) {
-	        for (var i = 0; i < sources.length; ++i) {
-	            var source = sources[i];
-	            for (var prop in source) {
-	                if (Object.prototype.hasOwnProperty.call(source, prop)) {
-	                    if (source[prop] === undefined) {
-	                        delete this[prop];
-	                    } else {
-	                        this[prop] = source[prop];
-	                    }
-	                }
-	            }
-	        }
-
-	        if (!this.id) {
-	            this.id = osmNote.id() + '';  // as string
-	        }
-
-	        return this;
-	    },
-
-	    extent: function() {
-	        return new geoExtent(this.loc);
-	    },
-
-	    update: function(attrs) {
-	        return osmNote(this, attrs); // {v: 1 + (this.v || 0)}
-	    },
-
-	    isNew: function() {
-	        return this.id < 0;
-	    },
-
-	    move: function(loc) {
-	        return this.update({ loc: loc });
-	    }
-
-	});
-
-	function osmRelation() {
-	    if (!(this instanceof osmRelation)) {
-	        return (new osmRelation()).initialize(arguments);
-	    } else if (arguments.length) {
-	        this.initialize(arguments);
-	    }
-	}
-
-
-	osmEntity.relation = osmRelation;
-
-	osmRelation.prototype = Object.create(osmEntity.prototype);
-
-
-	osmRelation.creationOrder = function(a, b) {
-	    var aId = parseInt(osmEntity.id.toOSM(a.id), 10);
-	    var bId = parseInt(osmEntity.id.toOSM(b.id), 10);
-
-	    if (aId < 0 || bId < 0) { return aId - bId; }
-	    return bId - aId;
-	};
-
-
-	Object.assign(osmRelation.prototype, {
-	    type: 'relation',
-	    members: [],
-
-
-	    copy: function(resolver, copies) {
-	        if (copies[this.id]) { return copies[this.id]; }
-
-	        var copy = osmEntity.prototype.copy.call(this, resolver, copies);
-
-	        var members = this.members.map(function(member) {
-	            return Object.assign({}, member, { id: resolver.entity(member.id).copy(resolver, copies).id });
-	        });
-
-	        copy = copy.update({members: members});
-	        copies[this.id] = copy;
-
-	        return copy;
-	    },
-
-
-	    extent: function(resolver, memo) {
-	        return resolver.transient(this, 'extent', function() {
-	            if (memo && memo[this.id]) { return geoExtent(); }
-	            memo = memo || {};
-	            memo[this.id] = true;
-
-	            var extent = geoExtent();
-	            for (var i = 0; i < this.members.length; i++) {
-	                var member = resolver.hasEntity(this.members[i].id);
-	                if (member) {
-	                    extent._extend(member.extent(resolver, memo));
-	                }
-	            }
-	            return extent;
-	        });
-	    },
-
-
-	    geometry: function(graph) {
-	        return graph.transient(this, 'geometry', function() {
-	            return this.isMultipolygon() ? 'area' : 'relation';
-	        });
-	    },
-
-
-	    isDegenerate: function() {
-	        return this.members.length === 0;
-	    },
-
-
-	    // Return an array of members, each extended with an 'index' property whose value
-	    // is the member index.
-	    indexedMembers: function() {
-	        var result = new Array(this.members.length);
-	        for (var i = 0; i < this.members.length; i++) {
-	            result[i] = Object.assign({}, this.members[i], {index: i});
-	        }
-	        return result;
-	    },
-
-
-	    // Return the first member with the given role. A copy of the member object
-	    // is returned, extended with an 'index' property whose value is the member index.
-	    memberByRole: function(role) {
-	        for (var i = 0; i < this.members.length; i++) {
-	            if (this.members[i].role === role) {
-	                return Object.assign({}, this.members[i], {index: i});
-	            }
-	        }
-	    },
-
-	    // Same as memberByRole, but returns all members with the given role
-	    membersByRole: function(role) {
-	        var result = [];
-	        for (var i = 0; i < this.members.length; i++) {
-	            if (this.members[i].role === role) {
-	                result.push(Object.assign({}, this.members[i], {index: i}));
-	            }
-	        }
-	        return result;
-	    },
-
-	    // Return the first member with the given id. A copy of the member object
-	    // is returned, extended with an 'index' property whose value is the member index.
-	    memberById: function(id) {
-	        for (var i = 0; i < this.members.length; i++) {
-	            if (this.members[i].id === id) {
-	                return Object.assign({}, this.members[i], {index: i});
-	            }
-	        }
-	    },
-
-
-	    // Return the first member with the given id and role. A copy of the member object
-	    // is returned, extended with an 'index' property whose value is the member index.
-	    memberByIdAndRole: function(id, role) {
-	        for (var i = 0; i < this.members.length; i++) {
-	            if (this.members[i].id === id && this.members[i].role === role) {
-	                return Object.assign({}, this.members[i], {index: i});
-	            }
-	        }
-	    },
-
-
-	    addMember: function(member, index) {
-	        var members = this.members.slice();
-	        members.splice(index === undefined ? members.length : index, 0, member);
-	        return this.update({members: members});
-	    },
-
-
-	    updateMember: function(member, index) {
-	        var members = this.members.slice();
-	        members.splice(index, 1, Object.assign({}, members[index], member));
-	        return this.update({members: members});
-	    },
-
-
-	    removeMember: function(index) {
-	        var members = this.members.slice();
-	        members.splice(index, 1);
-	        return this.update({members: members});
-	    },
-
-
-	    removeMembersWithID: function(id) {
-	        var members = this.members.filter(function(m) { return m.id !== id; });
-	        return this.update({members: members});
-	    },
-
-	    moveMember: function(fromIndex, toIndex) {
-	        var members = this.members.slice();
-	        members.splice(toIndex, 0, members.splice(fromIndex, 1)[0]);
-	        return this.update({members: members});
-	    },
-
-
-	    // Wherever a member appears with id `needle.id`, replace it with a member
-	    // with id `replacement.id`, type `replacement.type`, and the original role,
-	    // By default, adding a duplicate member (by id and role) is prevented.
-	    // Return an updated relation.
-	    replaceMember: function(needle, replacement, keepDuplicates) {
-	        if (!this.memberById(needle.id)) { return this; }
-
-	        var members = [];
-
-	        for (var i = 0; i < this.members.length; i++) {
-	            var member = this.members[i];
-	            if (member.id !== needle.id) {
-	                members.push(member);
-	            } else if (keepDuplicates || !this.memberByIdAndRole(replacement.id, member.role)) {
-	                members.push({ id: replacement.id, type: replacement.type, role: member.role });
-	            }
-	        }
-
-	        return this.update({ members: members });
-	    },
-
-
-	    asJXON: function(changeset_id) {
-	        var r = {
-	            relation: {
-	                '@id': this.osmId(),
-	                '@version': this.version || 0,
-	                member: this.members.map(function(member) {
-	                    return {
-	                        keyAttributes: {
-	                            type: member.type,
-	                            role: member.role,
-	                            ref: osmEntity.id.toOSM(member.id)
-	                        }
-	                    };
-	                }, this),
-	                tag: Object.keys(this.tags).map(function(k) {
-	                    return { keyAttributes: { k: k, v: this.tags[k] } };
-	                }, this)
-	            }
-	        };
-	        if (changeset_id) {
-	            r.relation['@changeset'] = changeset_id;
-	        }
-	        return r;
-	    },
-
-
-	    asGeoJSON: function(resolver) {
-	        return resolver.transient(this, 'GeoJSON', function () {
-	            if (this.isMultipolygon()) {
-	                return {
-	                    type: 'MultiPolygon',
-	                    coordinates: this.multipolygon(resolver)
-	                };
-	            } else {
-	                return {
-	                    type: 'FeatureCollection',
-	                    properties: this.tags,
-	                    features: this.members.map(function (member) {
-	                        return Object.assign({role: member.role}, resolver.entity(member.id).asGeoJSON(resolver));
-	                    })
-	                };
-	            }
-	        });
-	    },
-
-
-	    area: function(resolver) {
-	        return resolver.transient(this, 'area', function() {
-	            return d3_geoArea(this.asGeoJSON(resolver));
-	        });
-	    },
-
-
-	    isMultipolygon: function() {
-	        return this.tags.type === 'multipolygon';
-	    },
-
-
-	    isComplete: function(resolver) {
-	        for (var i = 0; i < this.members.length; i++) {
-	            if (!resolver.hasEntity(this.members[i].id)) {
-	                return false;
-	            }
-	        }
-	        return true;
-	    },
-
-
-	    hasFromViaTo: function() {
-	        return (
-	            this.members.some(function(m) { return m.role === 'from'; }) &&
-	            this.members.some(function(m) { return m.role === 'via'; }) &&
-	            this.members.some(function(m) { return m.role === 'to'; })
-	        );
-	    },
-
-
-	    isRestriction: function() {
-	        return !!(this.tags.type && this.tags.type.match(/^restriction:?/));
-	    },
-
-
-	    isValidRestriction: function() {
-	        if (!this.isRestriction()) { return false; }
-
-	        var froms = this.members.filter(function(m) { return m.role === 'from'; });
-	        var vias = this.members.filter(function(m) { return m.role === 'via'; });
-	        var tos = this.members.filter(function(m) { return m.role === 'to'; });
-
-	        if (froms.length !== 1 && this.tags.restriction !== 'no_entry') { return false; }
-	        if (froms.some(function(m) { return m.type !== 'way'; })) { return false; }
-
-	        if (tos.length !== 1 && this.tags.restriction !== 'no_exit') { return false; }
-	        if (tos.some(function(m) { return m.type !== 'way'; })) { return false; }
-
-	        if (vias.length === 0) { return false; }
-	        if (vias.length > 1 && vias.some(function(m) { return m.type !== 'way'; })) { return false; }
-
-	        return true;
-	    },
-
-
-	    // Returns an array [A0, ... An], each Ai being an array of node arrays [Nds0, ... Ndsm],
-	    // where Nds0 is an outer ring and subsequent Ndsi's (if any i > 0) being inner rings.
-	    //
-	    // This corresponds to the structure needed for rendering a multipolygon path using a
-	    // `evenodd` fill rule, as well as the structure of a GeoJSON MultiPolygon geometry.
-	    //
-	    // In the case of invalid geometries, this function will still return a result which
-	    // includes the nodes of all way members, but some Nds may be unclosed and some inner
-	    // rings not matched with the intended outer ring.
-	    //
-	    multipolygon: function(resolver) {
-	        var outers = this.members.filter(function(m) { return 'outer' === (m.role || 'outer'); });
-	        var inners = this.members.filter(function(m) { return 'inner' === m.role; });
-
-	        outers = osmJoinWays(outers, resolver);
-	        inners = osmJoinWays(inners, resolver);
-
-	        var sequenceToLineString = function(sequence) {
-	            if (sequence.nodes.length > 2 &&
-	                sequence.nodes[0] !== sequence.nodes[sequence.nodes.length - 1]) {
-	                // close unclosed parts to ensure correct area rendering - #2945
-	                sequence.nodes.push(sequence.nodes[0]);
-	            }
-	            return sequence.nodes.map(function(node) { return node.loc; });
-	        };
-
-	        outers = outers.map(sequenceToLineString);
-	        inners = inners.map(sequenceToLineString);
-
-	        var result = outers.map(function(o) {
-	            // Heuristic for detecting counterclockwise winding order. Assumes
-	            // that OpenStreetMap polygons are not hemisphere-spanning.
-	            return [d3_geoArea({ type: 'Polygon', coordinates: [o] }) > 2 * Math.PI ? o.reverse() : o];
-	        });
-
-	        function findOuter(inner) {
-	            var o, outer;
-
-	            for (o = 0; o < outers.length; o++) {
-	                outer = outers[o];
-	                if (geoPolygonContainsPolygon(outer, inner))
-	                    { return o; }
-	            }
-
-	            for (o = 0; o < outers.length; o++) {
-	                outer = outers[o];
-	                if (geoPolygonIntersectsPolygon(outer, inner, false))
-	                    { return o; }
-	            }
-	        }
-
-	        for (var i = 0; i < inners.length; i++) {
-	            var inner = inners[i];
-
-	            if (d3_geoArea({ type: 'Polygon', coordinates: [inner] }) < 2 * Math.PI) {
-	                inner = inner.reverse();
-	            }
-
-	            var o = findOuter(inners[i]);
-	            if (o !== undefined) {
-	                result[o].push(inners[i]);
-	            } else {
-	                result.push([inners[i]]); // Invalid geometry
-	            }
-	        }
-
-	        return result;
-	    }
-	});
-
-	var QAItem = function QAItem(loc, service, itemType, id, props) {
-	  // Store required properties
-	  this.loc = loc;
-	  this.service = service.title;
-	  this.itemType = itemType;
-
-	  // All issues must have an ID for selection, use generic if none specified
-	  this.id = id ? id : ("" + (QAItem.id()));
-
-	  this.update(props);
-
-	  // Some QA services have marker icons to differentiate issues
-	  if (service && typeof service.getIcon === 'function') {
-	    this.icon = service.getIcon(itemType);
-	  }
-
-	  return this;
-	};
-
-	QAItem.prototype.update = function update (props) {
-	    var this$1 = this;
-
-	  // You can't override this initial information
-	  var ref = this;
-	    var loc = ref.loc;
-	    var service = ref.service;
-	    var itemType = ref.itemType;
-	    var id = ref.id;
-
-	  Object.keys(props).forEach(function (prop) { return this$1[prop] = props[prop]; });
-
-	  this.loc = loc;
-	  this.service = service;
-	  this.itemType = itemType;
-	  this.id = id;
-
-	  return this;
-	};
-
-	// Generic handling for newly created QAItems
-	QAItem.id = function id () {
-	  return this.nextId--;
-	};
-	QAItem.nextId = -1;
-
-	// Split a way at the given node.
-	//
-	// Optionally, split only the given ways, if multiple ways share
-	// the given node.
-	//
-	// This is the inverse of `iD.actionJoin`.
-	//
-	// For testing convenience, accepts an ID to assign to the new way.
-	// Normally, this will be undefined and the way will automatically
-	// be assigned a new ID.
-	//
-	// Reference:
-	//   https://github.com/systemed/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/SplitWayAction.as
-	//
-	function actionSplit(nodeId, newWayIds) {
-	    var _wayIDs;
-
-	    // The IDs of the ways actually created by running this action
-	    var createdWayIDs = [];
-
-	    // If the way is closed, we need to search for a partner node
-	    // to split the way at.
-	    //
-	    // The following looks for a node that is both far away from
-	    // the initial node in terms of way segment length and nearby
-	    // in terms of beeline-distance. This assures that areas get
-	    // split on the most "natural" points (independent of the number
-	    // of nodes).
-	    // For example: bone-shaped areas get split across their waist
-	    // line, circles across the diameter.
-	    function splitArea(nodes, idxA, graph) {
-	        var lengths = new Array(nodes.length);
-	        var length;
-	        var i;
-	        var best = 0;
-	        var idxB;
-
-	        function wrap(index) {
-	            return utilWrap(index, nodes.length);
-	        }
-
-	        function dist(nA, nB) {
-	            var locA = graph.entity(nA).loc;
-	            var locB = graph.entity(nB).loc;
-	            var epsilon = 1e-6;
-	            return (locA && locB) ? geoSphericalDistance(locA, locB) : epsilon;
-	        }
-
-	        // calculate lengths
-	        length = 0;
-	        for (i = wrap(idxA + 1); i !== idxA; i = wrap(i + 1)) {
-	            length += dist(nodes[i], nodes[wrap(i - 1)]);
-	            lengths[i] = length;
-	        }
-
-	        length = 0;
-	        for (i = wrap(idxA - 1); i !== idxA; i = wrap(i - 1)) {
-	            length += dist(nodes[i], nodes[wrap(i + 1)]);
-	            if (length < lengths[i]) {
-	                lengths[i] = length;
-	            }
-	        }
-
-	        // determine best opposite node to split
-	        for (i = 0; i < nodes.length; i++) {
-	            var cost = lengths[i] / dist(nodes[idxA], nodes[i]);
-	            if (cost > best) {
-	                idxB = i;
-	                best = cost;
-	            }
-	        }
-
-	        return idxB;
-	    }
-
-
-	    function split(graph, wayA, newWayId) {
-	        var wayB = osmWay({ id: newWayId, tags: wayA.tags });   // `wayB` is the NEW way
-	        var origNodes = wayA.nodes.slice();
-	        var nodesA;
-	        var nodesB;
-	        var isArea = wayA.isArea();
-	        var isOuter = osmIsOldMultipolygonOuterMember(wayA, graph);
-
-	        if (wayA.isClosed()) {
-	            var nodes = wayA.nodes.slice(0, -1);
-	            var idxA = nodes.indexOf(nodeId);
-	            var idxB = splitArea(nodes, idxA, graph);
-
-	            if (idxB < idxA) {
-	                nodesA = nodes.slice(idxA).concat(nodes.slice(0, idxB + 1));
-	                nodesB = nodes.slice(idxB, idxA + 1);
-	            } else {
-	                nodesA = nodes.slice(idxA, idxB + 1);
-	                nodesB = nodes.slice(idxB).concat(nodes.slice(0, idxA + 1));
-	            }
-	        } else {
-	            var idx = wayA.nodes.indexOf(nodeId, 1);
-	            nodesA = wayA.nodes.slice(0, idx + 1);
-	            nodesB = wayA.nodes.slice(idx);
-	        }
-
-	        wayA = wayA.update({ nodes: nodesA });
-	        wayB = wayB.update({ nodes: nodesB });
-
-	        graph = graph.replace(wayA);
-	        graph = graph.replace(wayB);
-
-	        graph.parentRelations(wayA).forEach(function(relation) {
-	            var member;
-
-	            // Turn restrictions - make sure:
-	            // 1. Splitting a FROM/TO way - only `wayA` OR `wayB` remains in relation
-	            //    (whichever one is connected to the VIA node/ways)
-	            // 2. Splitting a VIA way - `wayB` remains in relation as a VIA way
-	            if (relation.hasFromViaTo()) {
-	                var f = relation.memberByRole('from');
-	                var v = relation.membersByRole('via');
-	                var t = relation.memberByRole('to');
-	                var i;
-
-	                // 1. split a FROM/TO
-	                if (f.id === wayA.id || t.id === wayA.id) {
-	                    var keepB = false;
-	                    if (v.length === 1 && v[0].type === 'node') {   // check via node
-	                        keepB = wayB.contains(v[0].id);
-	                    } else {                                        // check via way(s)
-	                        for (i = 0; i < v.length; i++) {
-	                            if (v[i].type === 'way') {
-	                                var wayVia = graph.hasEntity(v[i].id);
-	                                if (wayVia && utilArrayIntersection(wayB.nodes, wayVia.nodes).length) {
-	                                    keepB = true;
-	                                    break;
-	                                }
-	                            }
-	                        }
-	                    }
-
-	                    if (keepB) {
-	                        relation = relation.replaceMember(wayA, wayB);
-	                        graph = graph.replace(relation);
-	                    }
-
-	                // 2. split a VIA
-	                } else {
-	                    for (i = 0; i < v.length; i++) {
-	                        if (v[i].type === 'way' && v[i].id === wayA.id) {
-	                            member = {
-	                                id: wayB.id,
-	                                type: 'way',
-	                                role: 'via'
-	                            };
-	                            graph = actionAddMember(relation.id, member, v[i].index + 1)(graph);
-	                            break;
-	                        }
-	                    }
-	                }
-
-	            // All other relations (Routes, Multipolygons, etc):
-	            // 1. Both `wayA` and `wayB` remain in the relation
-	            // 2. But must be inserted as a pair (see `actionAddMember` for details)
-	            } else {
-	                if (relation === isOuter) {
-	                    graph = graph.replace(relation.mergeTags(wayA.tags));
-	                    graph = graph.replace(wayA.update({ tags: {} }));
-	                    graph = graph.replace(wayB.update({ tags: {} }));
-	                }
-
-	                member = {
-	                    id: wayB.id,
-	                    type: 'way',
-	                    role: relation.memberById(wayA.id).role
-	                };
-
-	                var insertPair = {
-	                    originalID: wayA.id,
-	                    insertedID: wayB.id,
-	                    nodes: origNodes
-	                };
-
-	                graph = actionAddMember(relation.id, member, undefined, insertPair)(graph);
-	            }
-	        });
-
-	        if (!isOuter && isArea) {
-	            var multipolygon = osmRelation({
-	                tags: Object.assign({}, wayA.tags, { type: 'multipolygon' }),
-	                members: [
-	                    { id: wayA.id, role: 'outer', type: 'way' },
-	                    { id: wayB.id, role: 'outer', type: 'way' }
-	                ]
-	            });
-
-	            graph = graph.replace(multipolygon);
-	            graph = graph.replace(wayA.update({ tags: {} }));
-	            graph = graph.replace(wayB.update({ tags: {} }));
-	        }
-
-	        createdWayIDs.push(wayB.id);
-
-	        return graph;
-	    }
-
-	    var action = function(graph) {
-	        var candidates = action.ways(graph);
-	        createdWayIDs = [];
-	        for (var i = 0; i < candidates.length; i++) {
-	            graph = split(graph, candidates[i], newWayIds && newWayIds[i]);
-	        }
-	        return graph;
-	    };
-
-	    action.getCreatedWayIDs = function() {
-	        return createdWayIDs;
-	    };
-
-	    action.ways = function(graph) {
-	        var node = graph.entity(nodeId);
-	        var parents = graph.parentWays(node);
-	        var hasLines = parents.some(function(parent) {
-	            return parent.geometry(graph) === 'line';
-	        });
-
-	        return parents.filter(function(parent) {
-	            if (_wayIDs && _wayIDs.indexOf(parent.id) === -1)
-	                { return false; }
-
-	            if (!_wayIDs && hasLines && parent.geometry(graph) !== 'line')
-	                { return false; }
-
-	            if (parent.isClosed()) {
-	                return true;
-	            }
-
-	            for (var i = 1; i < parent.nodes.length - 1; i++) {
-	                if (parent.nodes[i] === nodeId) {
-	                    return true;
-	                }
-	            }
-
-	            return false;
-	        });
-	    };
-
-
-	    action.disabled = function(graph) {
-	        var candidates = action.ways(graph);
-	        if (candidates.length === 0 || (_wayIDs && _wayIDs.length !== candidates.length)) {
-	            return 'not_eligible';
-	        }
-	    };
-
-
-	    action.limitWays = function(val) {
-	        if (!arguments.length) { return _wayIDs; }
-	        _wayIDs = val;
-	        return action;
-	    };
-
-
-	    return action;
-	}
-
-	function coreGraph(other, mutable) {
-	    if (!(this instanceof coreGraph)) { return new coreGraph(other, mutable); }
-
-	    if (other instanceof coreGraph) {
-	        var base = other.base();
-	        this.entities = Object.assign(Object.create(base.entities), other.entities);
-	        this._parentWays = Object.assign(Object.create(base.parentWays), other._parentWays);
-	        this._parentRels = Object.assign(Object.create(base.parentRels), other._parentRels);
-
-	    } else {
-	        this.entities = Object.create({});
-	        this._parentWays = Object.create({});
-	        this._parentRels = Object.create({});
-	        this.rebase(other || [], [this]);
-	    }
-
-	    this.transients = {};
-	    this._childNodes = {};
-	    this.frozen = !mutable;
-	}
-
-
-	coreGraph.prototype = {
-
-	    hasEntity: function(id) {
-	        return this.entities[id];
-	    },
-
-
-	    entity: function(id) {
-	        var entity = this.entities[id];
-
-	        //https://github.com/openstreetmap/iD/issues/3973#issuecomment-307052376
-	        if (!entity) {
-	            entity = this.entities.__proto__[id];  // eslint-disable-line no-proto
-	        }
-
-	        if (!entity) {
-	            throw new Error('entity ' + id + ' not found');
-	        }
-	        return entity;
-	    },
-
-
-	    geometry: function(id) {
-	        return this.entity(id).geometry(this);
-	    },
-
-
-	    transient: function(entity, key, fn) {
-	        var id = entity.id;
-	        var transients = this.transients[id] || (this.transients[id] = {});
-
-	        if (transients[key] !== undefined) {
-	            return transients[key];
-	        }
-
-	        transients[key] = fn.call(entity);
-
-	        return transients[key];
-	    },
-
-
-	    parentWays: function(entity) {
-	        var parents = this._parentWays[entity.id];
-	        var result = [];
-	        if (parents) {
-	            parents.forEach(function(id) {
-	                result.push(this.entity(id));
-	            }, this);
-	        }
-	        return result;
-	    },
-
-
-	    isPoi: function(entity) {
-	        var parents = this._parentWays[entity.id];
-	        return !parents || parents.size === 0;
-	    },
-
-
-	    isShared: function(entity) {
-	        var parents = this._parentWays[entity.id];
-	        return parents && parents.size > 1;
-	    },
-
-
-	    parentRelations: function(entity) {
-	        var parents = this._parentRels[entity.id];
-	        var result = [];
-	        if (parents) {
-	            parents.forEach(function(id) {
-	                result.push(this.entity(id));
-	            }, this);
-	        }
-	        return result;
-	    },
-
-	    parentMultipolygons: function(entity) {
-	        return this.parentRelations(entity).filter(function(relation) {
-	            return relation.isMultipolygon();
-	        });
-	    },
-
-
-	    childNodes: function(entity) {
-	        if (this._childNodes[entity.id]) { return this._childNodes[entity.id]; }
-	        if (!entity.nodes) { return []; }
-
-	        var nodes = [];
-	        for (var i = 0; i < entity.nodes.length; i++) {
-	            nodes[i] = this.entity(entity.nodes[i]);
-	        }
-
-	        this._childNodes[entity.id] = nodes;
-	        return this._childNodes[entity.id];
-	    },
-
-
-	    base: function() {
-	        return {
-	            'entities': Object.getPrototypeOf(this.entities),
-	            'parentWays': Object.getPrototypeOf(this._parentWays),
-	            'parentRels': Object.getPrototypeOf(this._parentRels)
-	        };
-	    },
-
-
-	    // Unlike other graph methods, rebase mutates in place. This is because it
-	    // is used only during the history operation that merges newly downloaded
-	    // data into each state. To external consumers, it should appear as if the
-	    // graph always contained the newly downloaded data.
-	    rebase: function(entities, stack, force) {
-	        var base = this.base();
-	        var i, j, k, id;
-
-	        for (i = 0; i < entities.length; i++) {
-	            var entity = entities[i];
-
-	            if (!entity.visible || (!force && base.entities[entity.id]))
-	                { continue; }
-
-	            // Merging data into the base graph
-	            base.entities[entity.id] = entity;
-	            this._updateCalculated(undefined, entity, base.parentWays, base.parentRels);
-
-	            // Restore provisionally-deleted nodes that are discovered to have an extant parent
-	            if (entity.type === 'way') {
-	                for (j = 0; j < entity.nodes.length; j++) {
-	                    id = entity.nodes[j];
-	                    for (k = 1; k < stack.length; k++) {
-	                        var ents = stack[k].entities;
-	                        if (ents.hasOwnProperty(id) && ents[id] === undefined) {
-	                            delete ents[id];
-	                        }
-	                    }
-	                }
-	            }
-	        }
-
-	        for (i = 0; i < stack.length; i++) {
-	            stack[i]._updateRebased();
-	        }
-	    },
-
-
-	    _updateRebased: function() {
-	        var base = this.base();
-
-	        Object.keys(this._parentWays).forEach(function(child) {
-	            if (base.parentWays[child]) {
-	                base.parentWays[child].forEach(function(id) {
-	                    if (!this.entities.hasOwnProperty(id)) {
-	                        this._parentWays[child].add(id);
-	                    }
-	                }, this);
-	            }
-	        }, this);
-
-	        Object.keys(this._parentRels).forEach(function(child) {
-	            if (base.parentRels[child]) {
-	                base.parentRels[child].forEach(function(id) {
-	                    if (!this.entities.hasOwnProperty(id)) {
-	                        this._parentRels[child].add(id);
-	                    }
-	                }, this);
-	            }
-	        }, this);
-
-	        this.transients = {};
-
-	        // this._childNodes is not updated, under the assumption that
-	        // ways are always downloaded with their child nodes.
-	    },
-
-
-	    // Updates calculated properties (parentWays, parentRels) for the specified change
-	    _updateCalculated: function(oldentity, entity, parentWays, parentRels) {
-	        parentWays = parentWays || this._parentWays;
-	        parentRels = parentRels || this._parentRels;
-
-	        var type = entity && entity.type || oldentity && oldentity.type;
-	        var removed, added, i;
-
-	        if (type === 'way') {   // Update parentWays
-	            if (oldentity && entity) {
-	                removed = utilArrayDifference(oldentity.nodes, entity.nodes);
-	                added = utilArrayDifference(entity.nodes, oldentity.nodes);
-	            } else if (oldentity) {
-	                removed = oldentity.nodes;
-	                added = [];
-	            } else if (entity) {
-	                removed = [];
-	                added = entity.nodes;
-	            }
-	            for (i = 0; i < removed.length; i++) {
-	                // make a copy of prototype property, store as own property, and update..
-	                parentWays[removed[i]] = new Set(parentWays[removed[i]]);
-	                parentWays[removed[i]].delete(oldentity.id);
-	            }
-	            for (i = 0; i < added.length; i++) {
-	                // make a copy of prototype property, store as own property, and update..
-	                parentWays[added[i]] = new Set(parentWays[added[i]]);
-	                parentWays[added[i]].add(entity.id);
-	            }
-
-	        } else if (type === 'relation') {   // Update parentRels
-
-	            // diff only on the IDs since the same entity can be a member multiple times with different roles
-	            var oldentityMemberIDs = oldentity ? oldentity.members.map(function(m) { return m.id; }) : [];
-	            var entityMemberIDs = entity ? entity.members.map(function(m) { return m.id; }) : [];
-
-	            if (oldentity && entity) {
-	                removed = utilArrayDifference(oldentityMemberIDs, entityMemberIDs);
-	                added = utilArrayDifference(entityMemberIDs, oldentityMemberIDs);
-	            } else if (oldentity) {
-	                removed = oldentityMemberIDs;
-	                added = [];
-	            } else if (entity) {
-	                removed = [];
-	                added = entityMemberIDs;
-	            }
-	            for (i = 0; i < removed.length; i++) {
-	                // make a copy of prototype property, store as own property, and update..
-	                parentRels[removed[i]] = new Set(parentRels[removed[i]]);
-	                parentRels[removed[i]].delete(oldentity.id);
-	            }
-	            for (i = 0; i < added.length; i++) {
-	                // make a copy of prototype property, store as own property, and update..
-	                parentRels[added[i]] = new Set(parentRels[added[i]]);
-	                parentRels[added[i]].add(entity.id);
-	            }
-	        }
-	    },
-
-
-	    replace: function(entity) {
-	        if (this.entities[entity.id] === entity) { return this; }
-
-	        return this.update(function() {
-	            this._updateCalculated(this.entities[entity.id], entity);
-	            this.entities[entity.id] = entity;
-	        });
-	    },
-
-
-	    remove: function(entity) {
-	        return this.update(function() {
-	            this._updateCalculated(entity, undefined);
-	            this.entities[entity.id] = undefined;
-	        });
-	    },
-
-
-	    revert: function(id) {
-	        var baseEntity = this.base().entities[id];
-	        var headEntity = this.entities[id];
-	        if (headEntity === baseEntity) { return this; }
-
-	        return this.update(function() {
-	            this._updateCalculated(headEntity, baseEntity);
-	            delete this.entities[id];
-	        });
-	    },
-
-
-	    update: function() {
-	        var arguments$1 = arguments;
-
-	        var graph = this.frozen ? coreGraph(this, true) : this;
-	        for (var i = 0; i < arguments.length; i++) {
-	            arguments$1[i].call(graph, graph);
-	        }
-
-	        if (this.frozen) { graph.frozen = true; }
-
-	        return graph;
-	    },
-
-
-	    // Obliterates any existing entities
-	    load: function(entities) {
-	        var base = this.base();
-	        this.entities = Object.create(base.entities);
-
-	        for (var i in entities) {
-	            this.entities[i] = entities[i];
-	            this._updateCalculated(base.entities[i], this.entities[i]);
-	        }
-
-	        return this;
-	    }
-	};
-
-	function osmTurn(turn) {
-	    if (!(this instanceof osmTurn)) {
-	        return new osmTurn(turn);
-	    }
-	    Object.assign(this, turn);
-	}
-
-
-	function osmIntersection(graph, startVertexId, maxDistance) {
-	    maxDistance = maxDistance || 30;    // in meters
-	    var vgraph = coreGraph();           // virtual graph
-	    var i, j, k;
-
-
-	    function memberOfRestriction(entity) {
-	        return graph.parentRelations(entity)
-	            .some(function(r) { return r.isRestriction(); });
-	    }
-
-	    function isRoad(way) {
-	        if (way.isArea() || way.isDegenerate()) { return false; }
-	        var roads = {
-	            'motorway': true,
-	            'motorway_link': true,
-	            'trunk': true,
-	            'trunk_link': true,
-	            'primary': true,
-	            'primary_link': true,
-	            'secondary': true,
-	            'secondary_link': true,
-	            'tertiary': true,
-	            'tertiary_link': true,
-	            'residential': true,
-	            'unclassified': true,
-	            'living_street': true,
-	            'service': true,
-	            'road': true,
-	            'track': true
-	        };
-	        return roads[way.tags.highway];
-	    }
-
-
-	    var startNode = graph.entity(startVertexId);
-	    var checkVertices = [startNode];
-	    var checkWays;
-	    var vertices = [];
-	    var vertexIds = [];
-	    var vertex;
-	    var ways = [];
-	    var wayIds = [];
-	    var way;
-	    var nodes = [];
-	    var node;
-	    var parents = [];
-	    var parent;
-
-	    // `actions` will store whatever actions must be performed to satisfy
-	    // preconditions for adding a turn restriction to this intersection.
-	    //  - Remove any existing degenerate turn restrictions (missing from/to, etc)
-	    //  - Reverse oneways so that they are drawn in the forward direction
-	    //  - Split ways on key vertices
-	    var actions = [];
-
-
-	    // STEP 1:  walk the graph outwards from starting vertex to search
-	    //  for more key vertices and ways to include in the intersection..
-
-	    while (checkVertices.length) {
-	        vertex = checkVertices.pop();
-
-	        // check this vertex for parent ways that are roads
-	        checkWays = graph.parentWays(vertex);
-	        var hasWays = false;
-	        for (i = 0; i < checkWays.length; i++) {
-	            way = checkWays[i];
-	            if (!isRoad(way) && !memberOfRestriction(way)) { continue; }
-
-	            ways.push(way);   // it's a road, or it's already in a turn restriction
-	            hasWays = true;
-
-	            // check the way's children for more key vertices
-	            nodes = utilArrayUniq(graph.childNodes(way));
-	            for (j = 0; j < nodes.length; j++) {
-	                node = nodes[j];
-	                if (node === vertex) { continue; }                                           // same thing
-	                if (vertices.indexOf(node) !== -1) { continue; }                             // seen it already
-	                if (geoSphericalDistance(node.loc, startNode.loc) > maxDistance) { continue; }   // too far from start
-
-	                // a key vertex will have parents that are also roads
-	                var hasParents = false;
-	                parents = graph.parentWays(node);
-	                for (k = 0; k < parents.length; k++) {
-	                    parent = parents[k];
-	                    if (parent === way) { continue; }                 // same thing
-	                    if (ways.indexOf(parent) !== -1) { continue; }    // seen it already
-	                    if (!isRoad(parent)) { continue; }                // not a road
-	                    hasParents = true;
-	                    break;
-	                }
-
-	                if (hasParents) {
-	                    checkVertices.push(node);
-	                }
-	            }
-	        }
-
-	        if (hasWays) {
-	            vertices.push(vertex);
-	        }
-	    }
-
-	    vertices = utilArrayUniq(vertices);
-	    ways = utilArrayUniq(ways);
-
-
-	    // STEP 2:  Build a virtual graph containing only the entities in the intersection..
-	    // Everything done after this step should act on the virtual graph
-	    // Any actions that must be performed later to the main graph go in `actions` array
-	    ways.forEach(function(way) {
-	        graph.childNodes(way).forEach(function(node) {
-	            vgraph = vgraph.replace(node);
-	        });
-
-	        vgraph = vgraph.replace(way);
-
-	        graph.parentRelations(way).forEach(function(relation) {
-	            if (relation.isRestriction()) {
-	                if (relation.isValidRestriction(graph)) {
-	                    vgraph = vgraph.replace(relation);
-	                } else if (relation.isComplete(graph)) {
-	                    actions.push(actionDeleteRelation(relation.id));
-	                }
-	            }
-	        });
-	    });
-
-
-	    // STEP 3:  Force all oneways to be drawn in the forward direction
-	    ways.forEach(function(w) {
-	        var way = vgraph.entity(w.id);
-	        if (way.tags.oneway === '-1') {
-	            var action = actionReverse(way.id, { reverseOneway: true });
-	            actions.push(action);
-	            vgraph = action(vgraph);
-	        }
-	    });
-
-
-	    // STEP 4:  Split ways on key vertices
-	    var origCount = osmEntity.id.next.way;
-	    vertices.forEach(function(v) {
-	        // This is an odd way to do it, but we need to find all the ways that
-	        // will be split here, then split them one at a time to ensure that these
-	        // actions can be replayed on the main graph exactly in the same order.
-	        // (It is unintuitive, but the order of ways returned from graph.parentWays()
-	        // is arbitrary, depending on how the main graph and vgraph were built)
-	        var splitAll = actionSplit(v.id);
-	        if (!splitAll.disabled(vgraph)) {
-	            splitAll.ways(vgraph).forEach(function(way) {
-	                var splitOne = actionSplit(v.id).limitWays([way.id]);
-	                actions.push(splitOne);
-	                vgraph = splitOne(vgraph);
-	            });
-	        }
-	    });
-
-	    // In here is where we should also split the intersection at nearby junction.
-	    //   for https://github.com/mapbox/iD-internal/issues/31
-	    // nearbyVertices.forEach(function(v) {
-	    // });
-
-	    // Reasons why we reset the way id count here:
-	    //  1. Continuity with way ids created by the splits so that we can replay
-	    //     these actions later if the user decides to create a turn restriction
-	    //  2. Avoids churning way ids just by hovering over a vertex
-	    //     and displaying the turn restriction editor
-	    osmEntity.id.next.way = origCount;
-
-
-	    // STEP 5:  Update arrays to point to vgraph entities
-	    vertexIds = vertices.map(function(v) { return v.id; });
-	    vertices = [];
-	    ways = [];
-
-	    vertexIds.forEach(function(id) {
-	        var vertex = vgraph.entity(id);
-	        var parents = vgraph.parentWays(vertex);
-	        vertices.push(vertex);
-	        ways = ways.concat(parents);
-	    });
-
-	    vertices = utilArrayUniq(vertices);
-	    ways = utilArrayUniq(ways);
-
-	    vertexIds = vertices.map(function(v) { return v.id; });
-	    wayIds = ways.map(function(w) { return w.id; });
-
-
-	    // STEP 6:  Update the ways with some metadata that will be useful for
-	    // walking the intersection graph later and rendering turn arrows.
-
-	    function withMetadata(way, vertexIds) {
-	        var __oneWay = way.isOneWay();
-
-	        // which affixes are key vertices?
-	        var __first = (vertexIds.indexOf(way.first()) !== -1);
-	        var __last = (vertexIds.indexOf(way.last()) !== -1);
-
-	        // what roles is this way eligible for?
-	        var __via = (__first && __last);
-	        var __from = ((__first && !__oneWay) || __last);
-	        var __to = (__first || (__last && !__oneWay));
-
-	        return way.update({
-	            __first:  __first,
-	            __last:  __last,
-	            __from:  __from,
-	            __via: __via,
-	            __to:  __to,
-	            __oneWay:  __oneWay
-	        });
-	    }
-
-	    ways = [];
-	    wayIds.forEach(function(id) {
-	        var way = withMetadata(vgraph.entity(id), vertexIds);
-	        vgraph = vgraph.replace(way);
-	        ways.push(way);
-	    });
-
-
-	    // STEP 7:  Simplify - This is an iterative process where we:
-	    //  1. Find trivial vertices with only 2 parents
-	    //  2. trim off the leaf way from those vertices and remove from vgraph
-
-	    var keepGoing;
-	    var removeWayIds = [];
-	    var removeVertexIds = [];
-
-	    do {
-	        keepGoing = false;
-	        checkVertices = vertexIds.slice();
-
-	        for (i = 0; i < checkVertices.length; i++) {
-	            var vertexId = checkVertices[i];
-	            vertex = vgraph.hasEntity(vertexId);
-
-	            if (!vertex) {
-	                if (vertexIds.indexOf(vertexId) !== -1) {
-	                    vertexIds.splice(vertexIds.indexOf(vertexId), 1);   // stop checking this one
-	                }
-	                removeVertexIds.push(vertexId);
-	                continue;
-	            }
-
-	            parents = vgraph.parentWays(vertex);
-	            if (parents.length < 3) {
-	                if (vertexIds.indexOf(vertexId) !== -1) {
-	                    vertexIds.splice(vertexIds.indexOf(vertexId), 1);   // stop checking this one
-	                }
-	            }
-
-	            if (parents.length === 2) {     // vertex with 2 parents is trivial
-	                var a = parents[0];
-	                var b = parents[1];
-	                var aIsLeaf = a && !a.__via;
-	                var bIsLeaf = b && !b.__via;
-	                var leaf, survivor;
-
-	                if (aIsLeaf && !bIsLeaf) {
-	                    leaf = a;
-	                    survivor = b;
-	                } else if (!aIsLeaf && bIsLeaf) {
-	                    leaf = b;
-	                    survivor = a;
-	                }
-
-	                if (leaf && survivor) {
-	                    survivor = withMetadata(survivor, vertexIds);      // update survivor way
-	                    vgraph = vgraph.replace(survivor).remove(leaf);    // update graph
-	                    removeWayIds.push(leaf.id);
-	                    keepGoing = true;
-	                }
-	            }
-
-	            parents = vgraph.parentWays(vertex);
-
-	            if (parents.length < 2) {     // vertex is no longer a key vertex
-	                if (vertexIds.indexOf(vertexId) !== -1) {
-	                    vertexIds.splice(vertexIds.indexOf(vertexId), 1);   // stop checking this one
-	                }
-	                removeVertexIds.push(vertexId);
-	                keepGoing = true;
-	            }
-
-	            if (parents.length < 1) {     // vertex is no longer attached to anything
-	                vgraph = vgraph.remove(vertex);
-	            }
-
-	        }
-	    } while (keepGoing);
-
-
-	    vertices = vertices
-	        .filter(function(vertex) { return removeVertexIds.indexOf(vertex.id) === -1; })
-	        .map(function(vertex) { return vgraph.entity(vertex.id); });
-	    ways = ways
-	        .filter(function(way) { return removeWayIds.indexOf(way.id) === -1; })
-	        .map(function(way) { return vgraph.entity(way.id); });
-
-
-	    // OK!  Here is our intersection..
-	    var intersection = {
-	        graph: vgraph,
-	        actions: actions,
-	        vertices: vertices,
-	        ways: ways,
-	    };
-
-
-
-	    // Get all the valid turns through this intersection given a starting way id.
-	    // This operates on the virtual graph for everything.
-	    //
-	    // Basically, walk through all possible paths from starting way,
-	    //   honoring the existing turn restrictions as we go (watch out for loops!)
-	    //
-	    // For each path found, generate and return a `osmTurn` datastructure.
-	    //
-	    intersection.turns = function(fromWayId, maxViaWay) {
-	        if (!fromWayId) { return []; }
-	        if (!maxViaWay) { maxViaWay = 0; }
-
-	        var vgraph = intersection.graph;
-	        var keyVertexIds = intersection.vertices.map(function(v) { return v.id; });
-
-	        var start = vgraph.entity(fromWayId);
-	        if (!start || !(start.__from || start.__via)) { return []; }
-
-	        // maxViaWay=0   from-*-to              (0 vias)
-	        // maxViaWay=1   from-*-via-*-to        (1 via max)
-	        // maxViaWay=2   from-*-via-*-via-*-to  (2 vias max)
-	        var maxPathLength = (maxViaWay * 2) + 3;
-	        var turns = [];
-
-	        step(start);
-	        return turns;
-
-
-	        // traverse the intersection graph and find all the valid paths
-	        function step(entity, currPath, currRestrictions, matchedRestriction) {
-	            currPath = (currPath || []).slice();  // shallow copy
-	            if (currPath.length >= maxPathLength) { return; }
-	            currPath.push(entity.id);
-	            currRestrictions = (currRestrictions || []).slice();  // shallow copy
-	            var i, j;
-
-	            if (entity.type === 'node') {
-	                var parents = vgraph.parentWays(entity);
-	                var nextWays = [];
-
-	                // which ways can we step into?
-	                for (i = 0; i < parents.length; i++) {
-	                    var way = parents[i];
-
-	                    // if next way is a oneway incoming to this vertex, skip
-	                    if (way.__oneWay && way.nodes[0] !== entity.id) { continue; }
-
-	                    // if we have seen it before (allowing for an initial u-turn), skip
-	                    if (currPath.indexOf(way.id) !== -1 && currPath.length >= 3) { continue; }
-
-	                    // Check all "current" restrictions (where we've already walked the `FROM`)
-	                    var restrict = undefined;
-	                    for (j = 0; j < currRestrictions.length; j++) {
-	                        var restriction = currRestrictions[j];
-	                        var f = restriction.memberByRole('from');
-	                        var v = restriction.membersByRole('via');
-	                        var t = restriction.memberByRole('to');
-	                        var isOnly = /^only_/.test(restriction.tags.restriction);
-
-	                        // Does the current path match this turn restriction?
-	                        var matchesFrom = (f.id === fromWayId);
-	                        var matchesViaTo = false;
-	                        var isAlongOnlyPath = false;
-
-	                        if (t.id === way.id) {     // match TO
-
-	                            if (v.length === 1 && v[0].type === 'node') {    // match VIA node
-	                                matchesViaTo = (v[0].id === entity.id && (
-	                                    (matchesFrom && currPath.length === 2) ||
-	                                    (!matchesFrom && currPath.length > 2)
-	                                ));
-
-	                            } else {                                         // match all VIA ways
-	                                var pathVias = [];
-	                                for (k = 2; k < currPath.length; k +=2 ) {   // k = 2 skips FROM
-	                                    pathVias.push(currPath[k]);              // (path goes way-node-way...)
-	                                }
-	                                var restrictionVias = [];
-	                                for (k = 0; k < v.length; k++) {
-	                                    if (v[k].type === 'way') {
-	                                        restrictionVias.push(v[k].id);
-	                                    }
-	                                }
-	                                var diff = utilArrayDifference(pathVias, restrictionVias);
-	                                matchesViaTo = !diff.length;
-	                            }
-
-	                        } else if (isOnly) {
-	                            for (k = 0; k < v.length; k++) {
-	                                // way doesn't match TO, but is one of the via ways along the path of an "only"
-	                                if (v[k].type === 'way' && v[k].id === way.id) {
-	                                    isAlongOnlyPath = true;
-	                                    break;
-	                                }
-	                            }
-	                        }
-
-	                        if (matchesViaTo) {
-	                            if (isOnly) {
-	                                restrict = { id: restriction.id, direct: matchesFrom, from: f.id, only: true, end: true };
-	                            } else {
-	                                restrict = { id: restriction.id, direct: matchesFrom, from: f.id, no: true, end: true };
-	                            }
-	                        } else {    // indirect - caused by a different nearby restriction
-	                            if (isAlongOnlyPath) {
-	                                restrict = { id: restriction.id, direct: false, from: f.id, only: true, end: false };
-	                            } else if (isOnly) {
-	                                restrict = { id: restriction.id, direct: false, from: f.id, no: true, end: true };
-	                            }
-	                        }
-
-	                        // stop looking if we find a "direct" restriction (matching FROM, VIA, TO)
-	                        if (restrict && restrict.direct)
-	                            { break; }
-	                    }
-
-	                    nextWays.push({ way: way, restrict: restrict });
-	                }
-
-	                nextWays.forEach(function(nextWay) {
-	                    step(nextWay.way, currPath, currRestrictions, nextWay.restrict);
-	                });
-
-
-	            } else {  // entity.type === 'way'
-	                if (currPath.length >= 3) {     // this is a "complete" path..
-	                    var turnPath = currPath.slice();   // shallow copy
-
-	                    // an indirect restriction - only include the partial path (starting at FROM)
-	                    if (matchedRestriction && matchedRestriction.direct === false) {
-	                        for (i = 0; i < turnPath.length; i++) {
-	                            if (turnPath[i] === matchedRestriction.from) {
-	                                turnPath = turnPath.slice(i);
-	                                break;
-	                            }
-	                        }
-	                    }
-
-	                    var turn = pathToTurn(turnPath);
-	                    if (turn) {
-	                        if (matchedRestriction) {
-	                            turn.restrictionID = matchedRestriction.id;
-	                            turn.no = matchedRestriction.no;
-	                            turn.only = matchedRestriction.only;
-	                            turn.direct = matchedRestriction.direct;
-	                        }
-	                        turns.push(osmTurn(turn));
-	                    }
-
-	                    if (currPath[0] === currPath[2]) { return; }   // if we made a u-turn - stop here
-	                }
-
-	                if (matchedRestriction && matchedRestriction.end) { return; }  // don't advance any further
-
-	                // which nodes can we step into?
-	                var n1 = vgraph.entity(entity.first());
-	                var n2 = vgraph.entity(entity.last());
-	                var dist = geoSphericalDistance(n1.loc, n2.loc);
-	                var nextNodes = [];
-
-	                if (currPath.length > 1) {
-	                    if (dist > maxDistance) { return; }   // the next node is too far
-	                    if (!entity.__via) { return; }        // this way is a leaf / can't be a via
-	                }
-
-	                if (!entity.__oneWay &&                     // bidirectional..
-	                    keyVertexIds.indexOf(n1.id) !== -1 &&   // key vertex..
-	                    currPath.indexOf(n1.id) === -1) {       // haven't seen it yet..
-	                    nextNodes.push(n1);                     // can advance to first node
-	                }
-	                if (keyVertexIds.indexOf(n2.id) !== -1 &&   // key vertex..
-	                    currPath.indexOf(n2.id) === -1) {       // haven't seen it yet..
-	                    nextNodes.push(n2);                     // can advance to last node
-	                }
-
-	                nextNodes.forEach(function(nextNode) {
-	                    // gather restrictions FROM this way
-	                    var fromRestrictions = vgraph.parentRelations(entity).filter(function(r) {
-	                        if (!r.isRestriction()) { return false; }
-
-	                        var f = r.memberByRole('from');
-	                        if (!f || f.id !== entity.id) { return false; }
-
-	                        var isOnly = /^only_/.test(r.tags.restriction);
-	                        if (!isOnly) { return true; }
-
-	                        // `only_` restrictions only matter along the direction of the VIA - #4849
-	                        var isOnlyVia = false;
-	                        var v = r.membersByRole('via');
-	                        if (v.length === 1 && v[0].type === 'node') {   // via node
-	                            isOnlyVia = (v[0].id === nextNode.id);
-	                        } else {                                        // via way(s)
-	                            for (var i = 0; i < v.length; i++) {
-	                                if (v[i].type !== 'way') { continue; }
-	                                var viaWay = vgraph.entity(v[i].id);
-	                                if (viaWay.first() === nextNode.id || viaWay.last() === nextNode.id) {
-	                                    isOnlyVia = true;
-	                                    break;
-	                                }
-	                            }
-	                        }
-	                        return isOnlyVia;
-	                    });
-
-	                    step(nextNode, currPath, currRestrictions.concat(fromRestrictions), false);
-	                });
-	            }
-	        }
-
-
-	        // assumes path is alternating way-node-way of odd length
-	        function pathToTurn(path) {
-	            if (path.length < 3) { return; }
-	            var fromWayId, fromNodeId, fromVertexId;
-	            var toWayId, toNodeId, toVertexId;
-	            var viaWayIds, viaNodeId, isUturn;
-
-	            fromWayId = path[0];
-	            toWayId = path[path.length - 1];
-
-	            if (path.length === 3 && fromWayId === toWayId) {  // u turn
-	                var way = vgraph.entity(fromWayId);
-	                if (way.__oneWay) { return null; }
-
-	                isUturn = true;
-	                viaNodeId = fromVertexId = toVertexId = path[1];
-	                fromNodeId = toNodeId = adjacentNode(fromWayId, viaNodeId);
-
-	            } else {
-	                isUturn = false;
-	                fromVertexId = path[1];
-	                fromNodeId = adjacentNode(fromWayId, fromVertexId);
-	                toVertexId = path[path.length - 2];
-	                toNodeId = adjacentNode(toWayId, toVertexId);
-
-	                if (path.length === 3) {
-	                    viaNodeId = path[1];
-	                } else {
-	                    viaWayIds = path.filter(function(entityId) { return entityId[0] === 'w'; });
-	                    viaWayIds = viaWayIds.slice(1, viaWayIds.length - 1);  // remove first, last
-	                }
-	            }
-
-	            return {
-	                key:  path.join('_'),
-	                path: path,
-	                from: { node: fromNodeId, way:  fromWayId, vertex: fromVertexId },
-	                via:  { node: viaNodeId,  ways: viaWayIds },
-	                to:   { node: toNodeId,   way:  toWayId, vertex: toVertexId },
-	                u:    isUturn
-	            };
-
-
-	            function adjacentNode(wayId, affixId) {
-	                var nodes = vgraph.entity(wayId).nodes;
-	                return affixId === nodes[0] ? nodes[1] : nodes[nodes.length - 2];
-	            }
-	        }
-
-	    };
-
-	    return intersection;
-	}
-
-
-	function osmInferRestriction(graph, turn, projection) {
-	    var fromWay = graph.entity(turn.from.way);
-	    var fromNode = graph.entity(turn.from.node);
-	    var fromVertex = graph.entity(turn.from.vertex);
-	    var toWay = graph.entity(turn.to.way);
-	    var toNode = graph.entity(turn.to.node);
-	    var toVertex = graph.entity(turn.to.vertex);
-
-	    var fromOneWay = (fromWay.tags.oneway === 'yes');
-	    var toOneWay = (toWay.tags.oneway === 'yes');
-	    var angle = (geoAngle(fromVertex, fromNode, projection) -
-	                geoAngle(toVertex, toNode, projection)) * 180 / Math.PI;
-
-	    while (angle < 0)
-	        { angle += 360; }
-
-	    if (fromNode === toNode)
-	        { return 'no_u_turn'; }
-	    if ((angle < 23 || angle > 336) && fromOneWay && toOneWay)
-	        { return 'no_u_turn'; }   // wider tolerance for u-turn if both ways are oneway
-	    if ((angle < 40 || angle > 319) && fromOneWay && toOneWay && turn.from.vertex !== turn.to.vertex)
-	        { return 'no_u_turn'; }   // even wider tolerance for u-turn if there is a via way (from !== to)
-	    if (angle < 158)
-	        { return 'no_right_turn'; }
-	    if (angle > 202)
-	        { return 'no_left_turn'; }
-
-	    return 'no_straight_on';
-	}
-
-	function actionMergePolygon(ids, newRelationId) {
-
-	    function groupEntities(graph) {
-	        var entities = ids.map(function (id) { return graph.entity(id); });
-	        var geometryGroups = utilArrayGroupBy(entities, function(entity) {
-	            if (entity.type === 'way' && entity.isClosed()) {
-	                return 'closedWay';
-	            } else if (entity.type === 'relation' && entity.isMultipolygon()) {
-	                return 'multipolygon';
-	            } else {
-	                return 'other';
-	            }
-	        });
-
-	        return Object.assign(
-	            { closedWay: [], multipolygon: [], other: [] },
-	            geometryGroups
-	        );
-	    }
-
-
-	    var action = function(graph) {
-	        var entities = groupEntities(graph);
-
-	        // An array representing all the polygons that are part of the multipolygon.
-	        //
-	        // Each element is itself an array of objects with an id property, and has a
-	        // locs property which is an array of the locations forming the polygon.
-	        var polygons = entities.multipolygon.reduce(function(polygons, m) {
-	            return polygons.concat(osmJoinWays(m.members, graph));
-	        }, []).concat(entities.closedWay.map(function(d) {
-	            var member = [{id: d.id}];
-	            member.nodes = graph.childNodes(d);
-	            return member;
-	        }));
-
-	        // contained is an array of arrays of boolean values,
-	        // where contained[j][k] is true iff the jth way is
-	        // contained by the kth way.
-	        var contained = polygons.map(function(w, i) {
-	            return polygons.map(function(d, n) {
-	                if (i === n) { return null; }
-	                return geoPolygonContainsPolygon(
-	                    d.nodes.map(function(n) { return n.loc; }),
-	                    w.nodes.map(function(n) { return n.loc; })
-	                );
-	            });
-	        });
-
-	        // Sort all polygons as either outer or inner ways
-	        var members = [];
-	        var outer = true;
-
-	        while (polygons.length) {
-	            extractUncontained(polygons);
-	            polygons = polygons.filter(isContained);
-	            contained = contained.filter(isContained).map(filterContained);
-	        }
-
-	        function isContained(d, i) {
-	            return contained[i].some(function(val) { return val; });
-	        }
-
-	        function filterContained(d) {
-	            return d.filter(isContained);
-	        }
-
-	        function extractUncontained(polygons) {
-	            polygons.forEach(function(d, i) {
-	                if (!isContained(d, i)) {
-	                    d.forEach(function(member) {
-	                        members.push({
-	                            type: 'way',
-	                            id: member.id,
-	                            role: outer ? 'outer' : 'inner'
-	                        });
-	                    });
-	                }
-	            });
-	            outer = !outer;
-	        }
-
-	        // Move all tags to one relation
-	        var relation = entities.multipolygon[0] ||
-	            osmRelation({ id: newRelationId, tags: { type: 'multipolygon' }});
-
-	        entities.multipolygon.slice(1).forEach(function(m) {
-	            relation = relation.mergeTags(m.tags);
-	            graph = graph.remove(m);
-	        });
-
-	        entities.closedWay.forEach(function(way) {
-	            function isThisOuter(m) {
-	                return m.id === way.id && m.role !== 'inner';
-	            }
-	            if (members.some(isThisOuter)) {
-	                relation = relation.mergeTags(way.tags);
-	                graph = graph.replace(way.update({ tags: {} }));
-	            }
-	        });
-
-	        return graph.replace(relation.update({
-	            members: members,
-	            tags: utilObjectOmit(relation.tags, ['area'])
-	        }));
-	    };
-
-
-	    action.disabled = function(graph) {
-	        var entities = groupEntities(graph);
-	        if (entities.other.length > 0 ||
-	            entities.closedWay.length + entities.multipolygon.length < 2) {
-	            return 'not_eligible';
-	        }
-	        if (!entities.multipolygon.every(function(r) { return r.isComplete(graph); })) {
-	            return 'incomplete_relation';
-	        }
-
-	        if (!entities.multipolygon.length) {
-	            var sharedMultipolygons = [];
-	            entities.closedWay.forEach(function(way, i) {
-	                if (i === 0) {
-	                    sharedMultipolygons = graph.parentMultipolygons(way);
-	                } else {
-	                    sharedMultipolygons = utilArrayIntersection(sharedMultipolygons, graph.parentMultipolygons(way));
-	                }
-	            });
-	            sharedMultipolygons = sharedMultipolygons.filter(function(relation) {
-	                return relation.members.length === entities.closedWay.length;
-	            });
-	            if (sharedMultipolygons.length) {
-	                // don't create a new multipolygon if it'd be redundant
-	                return 'not_eligible';
-	            }
-	        } else if (entities.closedWay.some(function(way) {
-	                return utilArrayIntersection(graph.parentMultipolygons(way), entities.multipolygon).length;
-	            })) {
-	            // don't add a way to a multipolygon again if it's already a member
-	            return 'not_eligible';
-	        }
-	    };
-
-
-	    return action;
-	}
-
-	// do not edit .js files directly - edit src/index.jst
-
-
-
-	var fastDeepEqual = function equal(a, b) {
-	  if (a === b) { return true; }
-
-	  if (a && b && typeof a == 'object' && typeof b == 'object') {
-	    if (a.constructor !== b.constructor) { return false; }
-
-	    var length, i, keys;
-	    if (Array.isArray(a)) {
-	      length = a.length;
-	      if (length != b.length) { return false; }
-	      for (i = length; i-- !== 0;)
-	        { if (!equal(a[i], b[i])) { return false; } }
-	      return true;
-	    }
-
-
-
-	    if (a.constructor === RegExp) { return a.source === b.source && a.flags === b.flags; }
-	    if (a.valueOf !== Object.prototype.valueOf) { return a.valueOf() === b.valueOf(); }
-	    if (a.toString !== Object.prototype.toString) { return a.toString() === b.toString(); }
-
-	    keys = Object.keys(a);
-	    length = keys.length;
-	    if (length !== Object.keys(b).length) { return false; }
-
-	    for (i = length; i-- !== 0;)
-	      { if (!Object.prototype.hasOwnProperty.call(b, keys[i])) { return false; } }
-
-	    for (i = length; i-- !== 0;) {
-	      var key = keys[i];
-
-	      if (!equal(a[key], b[key])) { return false; }
-	    }
-
-	    return true;
-	  }
-
-	  // true if both NaN, false otherwise
-	  return a!==a && b!==b;
-	};
-
-	// Text diff algorithm following Hunt and McIlroy 1976.
-	// J. W. Hunt and M. D. McIlroy, An algorithm for differential buffer
-	// comparison, Bell Telephone Laboratories CSTR #41 (1976)
-	// http://www.cs.dartmouth.edu/~doug/
-	// https://en.wikipedia.org/wiki/Longest_common_subsequence_problem
-	//
-	// Expects two arrays, finds longest common sequence
-	function LCS(buffer1, buffer2) {
-
-	  var equivalenceClasses = {};
-	  for (var j = 0; j < buffer2.length; j++) {
-	    var item = buffer2[j];
-	    if (equivalenceClasses[item]) {
-	      equivalenceClasses[item].push(j);
-	    } else {
-	      equivalenceClasses[item] = [j];
-	    }
-	  }
-
-	  var NULLRESULT = { buffer1index: -1, buffer2index: -1, chain: null };
-	  var candidates = [NULLRESULT];
-
-	  for (var i = 0; i < buffer1.length; i++) {
-	    var item$1 = buffer1[i];
-	    var buffer2indices = equivalenceClasses[item$1] || [];
-	    var r = 0;
-	    var c = candidates[0];
-
-	    for (var jx = 0; jx < buffer2indices.length; jx++) {
-	      var j$1 = buffer2indices[jx];
-
-	      var s = (void 0);
-	      for (s = r; s < candidates.length; s++) {
-	        if ((candidates[s].buffer2index < j$1) && ((s === candidates.length - 1) || (candidates[s + 1].buffer2index > j$1))) {
-	          break;
-	        }
-	      }
-
-	      if (s < candidates.length) {
-	        var newCandidate = { buffer1index: i, buffer2index: j$1, chain: candidates[s] };
-	        if (r === candidates.length) {
-	          candidates.push(c);
-	        } else {
-	          candidates[r] = c;
-	        }
-	        r = s + 1;
-	        c = newCandidate;
-	        if (r === candidates.length) {
-	          break; // no point in examining further (j)s
-	        }
-	      }
-	    }
-
-	    candidates[r] = c;
-	  }
-
-	  // At this point, we know the LCS: it's in the reverse of the
-	  // linked-list through .chain of candidates[candidates.length - 1].
-
-	  return candidates[candidates.length - 1];
-	}
-
-
-	// We apply the LCS to give a simple representation of the
-	// offsets and lengths of mismatched chunks in the input
-	// buffers. This is used by diff3MergeRegions.
-	function diffIndices(buffer1, buffer2) {
-	  var lcs = LCS(buffer1, buffer2);
-	  var result = [];
-	  var tail1 = buffer1.length;
-	  var tail2 = buffer2.length;
-
-	  for (var candidate = lcs; candidate !== null; candidate = candidate.chain) {
-	    var mismatchLength1 = tail1 - candidate.buffer1index - 1;
-	    var mismatchLength2 = tail2 - candidate.buffer2index - 1;
-	    tail1 = candidate.buffer1index;
-	    tail2 = candidate.buffer2index;
-
-	    if (mismatchLength1 || mismatchLength2) {
-	      result.push({
-	        buffer1: [tail1 + 1, mismatchLength1],
-	        buffer1Content: buffer1.slice(tail1 + 1, tail1 + 1 + mismatchLength1),
-	        buffer2: [tail2 + 1, mismatchLength2],
-	        buffer2Content: buffer2.slice(tail2 + 1, tail2 + 1 + mismatchLength2)
-	      });
-	    }
-	  }
-
-	  result.reverse();
-	  return result;
-	}
-
-
-	// Given three buffers, A, O, and B, where both A and B are
-	// independently derived from O, returns a fairly complicated
-	// internal representation of merge decisions it's taken. The
-	// interested reader may wish to consult
-	//
-	// Sanjeev Khanna, Keshav Kunal, and Benjamin C. Pierce.
-	// 'A Formal Investigation of ' In Arvind and Prasad,
-	// editors, Foundations of Software Technology and Theoretical
-	// Computer Science (FSTTCS), December 2007.
-	//
-	// (http://www.cis.upenn.edu/~bcpierce/papers/diff3-short.pdf)
-	//
-	function diff3MergeRegions(a, o, b) {
-
-	  // "hunks" are array subsets where `a` or `b` are different from `o`
-	  // https://www.gnu.org/software/diffutils/manual/html_node/diff3-Hunks.html
-	  var hunks = [];
-	  function addHunk(h, ab) {
-	    hunks.push({
-	      ab: ab,
-	      oStart: h.buffer1[0],
-	      oLength: h.buffer1[1],   // length of o to remove
-	      abStart: h.buffer2[0],
-	      abLength: h.buffer2[1]   // length of a/b to insert
-	      // abContent: (ab === 'a' ? a : b).slice(h.buffer2[0], h.buffer2[0] + h.buffer2[1])
-	    });
-	  }
-
-	  diffIndices(o, a).forEach(function (item) { return addHunk(item, 'a'); });
-	  diffIndices(o, b).forEach(function (item) { return addHunk(item, 'b'); });
-	  hunks.sort(function (x,y) { return x.oStart - y.oStart; });
-
-	  var results = [];
-	  var currOffset = 0;
-
-	  function advanceTo(endOffset) {
-	    if (endOffset > currOffset) {
-	      results.push({
-	        stable: true,
-	        buffer: 'o',
-	        bufferStart: currOffset,
-	        bufferLength: endOffset - currOffset,
-	        bufferContent: o.slice(currOffset, endOffset)
-	      });
-	      currOffset = endOffset;
-	    }
-	  }
-
-	  while (hunks.length) {
-	    var hunk = hunks.shift();
-	    var regionStart = hunk.oStart;
-	    var regionEnd = hunk.oStart + hunk.oLength;
-	    var regionHunks = [hunk];
-	    advanceTo(regionStart);
-
-	    // Try to pull next overlapping hunk into this region
-	    while (hunks.length) {
-	      var nextHunk = hunks[0];
-	      var nextHunkStart = nextHunk.oStart;
-	      if (nextHunkStart > regionEnd) { break; }   // no overlap
-
-	      regionEnd = Math.max(regionEnd, nextHunkStart + nextHunk.oLength);
-	      regionHunks.push(hunks.shift());
-	    }
-
-	    if (regionHunks.length === 1) {
-	      // Only one hunk touches this region, meaning that there is no conflict here.
-	      // Either `a` or `b` is inserting into a region of `o` unchanged by the other.
-	      if (hunk.abLength > 0) {
-	        var buffer = (hunk.ab === 'a' ? a : b);
-	        results.push({
-	          stable: true,
-	          buffer: hunk.ab,
-	          bufferStart: hunk.abStart,
-	          bufferLength: hunk.abLength,
-	          bufferContent: buffer.slice(hunk.abStart, hunk.abStart + hunk.abLength)
-	        });
-	      }
-	    } else {
-	      // A true a/b conflict. Determine the bounds involved from `a`, `o`, and `b`.
-	      // Effectively merge all the `a` hunks into one giant hunk, then do the
-	      // same for the `b` hunks; then, correct for skew in the regions of `o`
-	      // that each side changed, and report appropriate spans for the three sides.
-	      var bounds = {
-	        a: [a.length, -1, o.length, -1],
-	        b: [b.length, -1, o.length, -1]
-	      };
-	      while (regionHunks.length) {
-	        hunk = regionHunks.shift();
-	        var oStart = hunk.oStart;
-	        var oEnd = oStart + hunk.oLength;
-	        var abStart = hunk.abStart;
-	        var abEnd = abStart + hunk.abLength;
-	        var b$1 = bounds[hunk.ab];
-	        b$1[0] = Math.min(abStart, b$1[0]);
-	        b$1[1] = Math.max(abEnd, b$1[1]);
-	        b$1[2] = Math.min(oStart, b$1[2]);
-	        b$1[3] = Math.max(oEnd, b$1[3]);
-	      }
-
-	      var aStart = bounds.a[0] + (regionStart - bounds.a[2]);
-	      var aEnd = bounds.a[1] + (regionEnd - bounds.a[3]);
-	      var bStart = bounds.b[0] + (regionStart - bounds.b[2]);
-	      var bEnd = bounds.b[1] + (regionEnd - bounds.b[3]);
-
-	      var result = {
-	        stable: false,
-	        aStart: aStart,
-	        aLength: aEnd - aStart,
-	        aContent: a.slice(aStart, aEnd),
-	        oStart: regionStart,
-	        oLength: regionEnd - regionStart,
-	        oContent: o.slice(regionStart, regionEnd),
-	        bStart: bStart,
-	        bLength: bEnd - bStart,
-	        bContent: b.slice(bStart, bEnd)
-	      };
-	      results.push(result);
-	    }
-	    currOffset = regionEnd;
-	  }
-
-	  advanceTo(o.length);
-
-	  return results;
-	}
-
-
-	// Applies the output of diff3MergeRegions to actually
-	// construct the merged buffer; the returned result alternates
-	// between 'ok' and 'conflict' blocks.
-	// A "false conflict" is where `a` and `b` both change the same from `o`
-	function diff3Merge(a, o, b, options) {
-	  var defaults = {
-	    excludeFalseConflicts: true,
-	    stringSeparator: /\s+/
-	  };
-	  options = Object.assign(defaults, options);
-
-	  var aString = (typeof a === 'string');
-	  var oString = (typeof o === 'string');
-	  var bString = (typeof b === 'string');
-
-	  if (aString) { a = a.split(options.stringSeparator); }
-	  if (oString) { o = o.split(options.stringSeparator); }
-	  if (bString) { b = b.split(options.stringSeparator); }
-
-	  var results = [];
-	  var regions = diff3MergeRegions(a, o, b);
-
-	  var okBuffer = [];
-	  function flushOk() {
-	    if (okBuffer.length) {
-	      results.push({ ok: okBuffer });
-	    }
-	    okBuffer = [];
-	  }
-
-	  function isFalseConflict(a, b) {
-	    if (a.length !== b.length) { return false; }
-	    for (var i = 0; i < a.length; i++) {
-	      if (a[i] !== b[i]) { return false; }
-	    }
-	    return true;
-	  }
-
-	  regions.forEach(function (region) {
-	    if (region.stable) {
-	      okBuffer.push.apply(okBuffer, region.bufferContent);
-	    } else {
-	      if (options.excludeFalseConflicts && isFalseConflict(region.aContent, region.bContent)) {
-	        okBuffer.push.apply(okBuffer, region.aContent);
-	      } else {
-	        flushOk();
-	        results.push({
-	          conflict: {
-	            a: region.aContent,
-	            aIndex: region.aStart,
-	            o: region.oContent,
-	            oIndex: region.oStart,
-	            b: region.bContent,
-	            bIndex: region.bStart
-	          }
-	        });
-	      }
-	    }
-	  });
-
-	  flushOk();
-	  return results;
-	}
-
-	function actionMergeRemoteChanges(id, localGraph, remoteGraph, discardTags, formatUser) {
-	    discardTags = discardTags || {};
-	    var _option = 'safe';  // 'safe', 'force_local', 'force_remote'
-	    var _conflicts = [];
-
-
-	    function user(d) {
-	        return (typeof formatUser === 'function') ? formatUser(d) : d;
-	    }
-
-
-	    function mergeLocation(remote, target) {
-	        function pointEqual(a, b) {
-	            var epsilon = 1e-6;
-	            return (Math.abs(a[0] - b[0]) < epsilon) && (Math.abs(a[1] - b[1]) < epsilon);
-	        }
-
-	        if (_option === 'force_local' || pointEqual(target.loc, remote.loc)) {
-	            return target;
-	        }
-	        if (_option === 'force_remote') {
-	            return target.update({loc: remote.loc});
-	        }
-
-	        _conflicts.push(_t('merge_remote_changes.conflict.location', { user: user(remote.user) }));
-	        return target;
-	    }
-
-
-	    function mergeNodes(base, remote, target) {
-	        if (_option === 'force_local' || fastDeepEqual(target.nodes, remote.nodes)) {
-	            return target;
-	        }
-	        if (_option === 'force_remote') {
-	            return target.update({nodes: remote.nodes});
-	        }
-
-	        var ccount = _conflicts.length;
-	        var o = base.nodes || [];
-	        var a = target.nodes || [];
-	        var b = remote.nodes || [];
-	        var nodes = [];
-	        var hunks = diff3Merge(a, o, b, { excludeFalseConflicts: true });
-
-	        for (var i = 0; i < hunks.length; i++) {
-	            var hunk = hunks[i];
-	            if (hunk.ok) {
-	                nodes.push.apply(nodes, hunk.ok);
-	            } else {
-	                // for all conflicts, we can assume c.a !== c.b
-	                // because `diff3Merge` called with `true` option to exclude false conflicts..
-	                var c = hunk.conflict;
-	                if (fastDeepEqual(c.o, c.a)) {  // only changed remotely
-	                    nodes.push.apply(nodes, c.b);
-	                } else if (fastDeepEqual(c.o, c.b)) {  // only changed locally
-	                    nodes.push.apply(nodes, c.a);
-	                } else {       // changed both locally and remotely
-	                    _conflicts.push(_t('merge_remote_changes.conflict.nodelist', { user: user(remote.user) }));
-	                    break;
-	                }
-	            }
-	        }
-
-	        return (_conflicts.length === ccount) ? target.update({nodes: nodes}) : target;
-	    }
-
-
-	    function mergeChildren(targetWay, children, updates, graph) {
-	        function isUsed(node, targetWay) {
-	            var hasInterestingParent = graph.parentWays(node)
-	                .some(function(way) { return way.id !== targetWay.id; });
-
-	            return node.hasInterestingTags() ||
-	                hasInterestingParent ||
-	                graph.parentRelations(node).length > 0;
-	        }
-
-	        var ccount = _conflicts.length;
-
-	        for (var i = 0; i < children.length; i++) {
-	            var id = children[i];
-	            var node = graph.hasEntity(id);
-
-	            // remove unused childNodes..
-	            if (targetWay.nodes.indexOf(id) === -1) {
-	                if (node && !isUsed(node, targetWay)) {
-	                    updates.removeIds.push(id);
-	                }
-	                continue;
-	            }
-
-	            // restore used childNodes..
-	            var local = localGraph.hasEntity(id);
-	            var remote = remoteGraph.hasEntity(id);
-	            var target;
-
-	            if (_option === 'force_remote' && remote && remote.visible) {
-	                updates.replacements.push(remote);
-
-	            } else if (_option === 'force_local' && local) {
-	                target = osmEntity(local);
-	                if (remote) {
-	                    target = target.update({ version: remote.version });
-	                }
-	                updates.replacements.push(target);
-
-	            } else if (_option === 'safe' && local && remote && local.version !== remote.version) {
-	                target = osmEntity(local, { version: remote.version });
-	                if (remote.visible) {
-	                    target = mergeLocation(remote, target);
-	                } else {
-	                    _conflicts.push(_t('merge_remote_changes.conflict.deleted', { user: user(remote.user) }));
-	                }
-
-	                if (_conflicts.length !== ccount) { break; }
-	                updates.replacements.push(target);
-	            }
-	        }
-
-	        return targetWay;
-	    }
-
-
-	    function updateChildren(updates, graph) {
-	        for (var i = 0; i < updates.replacements.length; i++) {
-	            graph = graph.replace(updates.replacements[i]);
-	        }
-	        if (updates.removeIds.length) {
-	            graph = actionDeleteMultiple(updates.removeIds)(graph);
-	        }
-	        return graph;
-	    }
-
-
-	    function mergeMembers(remote, target) {
-	        if (_option === 'force_local' || fastDeepEqual(target.members, remote.members)) {
-	            return target;
-	        }
-	        if (_option === 'force_remote') {
-	            return target.update({members: remote.members});
-	        }
-
-	        _conflicts.push(_t('merge_remote_changes.conflict.memberlist', { user: user(remote.user) }));
-	        return target;
-	    }
-
-
-	    function mergeTags(base, remote, target) {
-	        if (_option === 'force_local' || fastDeepEqual(target.tags, remote.tags)) {
-	            return target;
-	        }
-	        if (_option === 'force_remote') {
-	            return target.update({tags: remote.tags});
-	        }
-
-	        var ccount = _conflicts.length;
-	        var o = base.tags || {};
-	        var a = target.tags || {};
-	        var b = remote.tags || {};
-	        var keys = utilArrayUnion(utilArrayUnion(Object.keys(o), Object.keys(a)), Object.keys(b))
-	            .filter(function(k) { return !discardTags[k]; });
-	        var tags = Object.assign({}, a);   // shallow copy
-	        var changed = false;
-
-	        for (var i = 0; i < keys.length; i++) {
-	            var k = keys[i];
-
-	            if (o[k] !== b[k] && a[k] !== b[k]) {    // changed remotely..
-	                if (o[k] !== a[k]) {      // changed locally..
-	                    _conflicts.push(_t('merge_remote_changes.conflict.tags',
-	                        { tag: k, local: a[k], remote: b[k], user: user(remote.user) }));
-
-	                } else {                  // unchanged locally, accept remote change..
-	                    if (b.hasOwnProperty(k)) {
-	                        tags[k] = b[k];
-	                    } else {
-	                        delete tags[k];
-	                    }
-	                    changed = true;
-	                }
-	            }
-	        }
-
-	        return (changed && _conflicts.length === ccount) ? target.update({tags: tags}) : target;
-	    }
-
-
-	    //  `graph.base()` is the common ancestor of the two graphs.
-	    //  `localGraph` contains user's edits up to saving
-	    //  `remoteGraph` contains remote edits to modified nodes
-	    //  `graph` must be a descendent of `localGraph` and may include
-	    //      some conflict resolution actions performed on it.
-	    //
-	    //                  --- ... --- `localGraph` -- ... -- `graph`
-	    //                 /
-	    //  `graph.base()` --- ... --- `remoteGraph`
-	    //
-	    var action = function(graph) {
-	        var updates = { replacements: [], removeIds: [] };
-	        var base = graph.base().entities[id];
-	        var local = localGraph.entity(id);
-	        var remote = remoteGraph.entity(id);
-	        var target = osmEntity(local, { version: remote.version });
-
-	        // delete/undelete
-	        if (!remote.visible) {
-	            if (_option === 'force_remote') {
-	                return actionDeleteMultiple([id])(graph);
-
-	            } else if (_option === 'force_local') {
-	                if (target.type === 'way') {
-	                    target = mergeChildren(target, utilArrayUniq(local.nodes), updates, graph);
-	                    graph = updateChildren(updates, graph);
-	                }
-	                return graph.replace(target);
-
-	            } else {
-	                _conflicts.push(_t('merge_remote_changes.conflict.deleted', { user: user(remote.user) }));
-	                return graph;  // do nothing
-	            }
-	        }
-
-	        // merge
-	        if (target.type === 'node') {
-	            target = mergeLocation(remote, target);
-
-	        } else if (target.type === 'way') {
-	            // pull in any child nodes that may not be present locally..
-	            graph.rebase(remoteGraph.childNodes(remote), [graph], false);
-	            target = mergeNodes(base, remote, target);
-	            target = mergeChildren(target, utilArrayUnion(local.nodes, remote.nodes), updates, graph);
-
-	        } else if (target.type === 'relation') {
-	            target = mergeMembers(remote, target);
-	        }
-
-	        target = mergeTags(base, remote, target);
-
-	        if (!_conflicts.length) {
-	            graph = updateChildren(updates, graph).replace(target);
-	        }
-
-	        return graph;
-	    };
-
-
-	    action.withOption = function(opt) {
-	        _option = opt;
-	        return action;
-	    };
-
-
-	    action.conflicts = function() {
-	        return _conflicts;
-	    };
-
-
-	    return action;
-	}
-
-	// https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/command/MoveCommand.java
-	// https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MoveNodeAction.as
-	function actionMove(moveIDs, tryDelta, projection, cache) {
-	    var _delta = tryDelta;
-
-	    function setupCache(graph) {
-	        function canMove(nodeID) {
-	            // Allow movement of any node that is in the selectedIDs list..
-	            if (moveIDs.indexOf(nodeID) !== -1) { return true; }
-
-	            // Allow movement of a vertex where 2 ways meet..
-	            var parents = graph.parentWays(graph.entity(nodeID));
-	            if (parents.length < 3) { return true; }
-
-	            // Restrict movement of a vertex where >2 ways meet, unless all parentWays are moving too..
-	            var parentsMoving = parents.every(function(way) { return cache.moving[way.id]; });
-	            if (!parentsMoving) { delete cache.moving[nodeID]; }
-
-	            return parentsMoving;
-	        }
-
-	        function cacheEntities(ids) {
-	            for (var i = 0; i < ids.length; i++) {
-	                var id = ids[i];
-	                if (cache.moving[id]) { continue; }
-	                cache.moving[id] = true;
-
-	                var entity = graph.hasEntity(id);
-	                if (!entity) { continue; }
-
-	                if (entity.type === 'node') {
-	                    cache.nodes.push(id);
-	                    cache.startLoc[id] = entity.loc;
-	                } else if (entity.type === 'way') {
-	                    cache.ways.push(id);
-	                    cacheEntities(entity.nodes);
-	                } else {
-	                    cacheEntities(entity.members.map(function(member) {
-	                        return member.id;
-	                    }));
-	                }
-	            }
-	        }
-
-	        function cacheIntersections(ids) {
-	            function isEndpoint(way, id) {
-	                return !way.isClosed() && !!way.affix(id);
-	            }
-
-	            for (var i = 0; i < ids.length; i++) {
-	                var id = ids[i];
-
-	                // consider only intersections with 1 moved and 1 unmoved way.
-	                var childNodes = graph.childNodes(graph.entity(id));
-	                for (var j = 0; j < childNodes.length; j++) {
-	                    var node = childNodes[j];
-	                    var parents = graph.parentWays(node);
-	                    if (parents.length !== 2) { continue; }
-
-	                    var moved = graph.entity(id);
-	                    var unmoved = null;
-	                    for (var k = 0; k < parents.length; k++) {
-	                        var way = parents[k];
-	                        if (!cache.moving[way.id]) {
-	                            unmoved = way;
-	                            break;
-	                        }
-	                    }
-	                    if (!unmoved) { continue; }
-
-	                    // exclude ways that are overly connected..
-	                    if (utilArrayIntersection(moved.nodes, unmoved.nodes).length > 2) { continue; }
-	                    if (moved.isArea() || unmoved.isArea()) { continue; }
-
-	                    cache.intersections.push({
-	                        nodeId: node.id,
-	                        movedId: moved.id,
-	                        unmovedId: unmoved.id,
-	                        movedIsEP: isEndpoint(moved, node.id),
-	                        unmovedIsEP: isEndpoint(unmoved, node.id)
-	                    });
-	                }
-	            }
-	        }
-
-
-	        if (!cache) {
-	            cache = {};
-	        }
-	        if (!cache.ok) {
-	            cache.moving = {};
-	            cache.intersections = [];
-	            cache.replacedVertex = {};
-	            cache.startLoc = {};
-	            cache.nodes = [];
-	            cache.ways = [];
-
-	            cacheEntities(moveIDs);
-	            cacheIntersections(cache.ways);
-	            cache.nodes = cache.nodes.filter(canMove);
-
-	            cache.ok = true;
-	        }
-	    }
-
-
-	    // Place a vertex where the moved vertex used to be, to preserve way shape..
-	    //
-	    //  Start:
-	    //      b ---- e
-	    //     / \
-	    //    /   \
-	    //   /     \
-	    //  a       c
-	    //
-	    //      *               node '*' added to preserve shape
-	    //     / \
-	    //    /   b ---- e      way `b,e` moved here:
-	    //   /     \
-	    //  a       c
-	    //
-	    //
-	    function replaceMovedVertex(nodeId, wayId, graph, delta) {
-	        var way = graph.entity(wayId);
-	        var moved = graph.entity(nodeId);
-	        var movedIndex = way.nodes.indexOf(nodeId);
-	        var len, prevIndex, nextIndex;
-
-	        if (way.isClosed()) {
-	            len = way.nodes.length - 1;
-	            prevIndex = (movedIndex + len - 1) % len;
-	            nextIndex = (movedIndex + len + 1) % len;
-	        } else {
-	            len = way.nodes.length;
-	            prevIndex = movedIndex - 1;
-	            nextIndex = movedIndex + 1;
-	        }
-
-	        var prev = graph.hasEntity(way.nodes[prevIndex]);
-	        var next = graph.hasEntity(way.nodes[nextIndex]);
-
-	        // Don't add orig vertex at endpoint..
-	        if (!prev || !next) { return graph; }
-
-	        var key = wayId + '_' + nodeId;
-	        var orig = cache.replacedVertex[key];
-	        if (!orig) {
-	            orig = osmNode();
-	            cache.replacedVertex[key] = orig;
-	            cache.startLoc[orig.id] = cache.startLoc[nodeId];
-	        }
-
-	        var start, end;
-	        if (delta) {
-	            start = projection(cache.startLoc[nodeId]);
-	            end = projection.invert(geoVecAdd(start, delta));
-	        } else {
-	            end = cache.startLoc[nodeId];
-	        }
-	        orig = orig.move(end);
-
-	        var angle = Math.abs(geoAngle(orig, prev, projection) -
-	                geoAngle(orig, next, projection)) * 180 / Math.PI;
-
-	        // Don't add orig vertex if it would just make a straight line..
-	        if (angle > 175 && angle < 185) { return graph; }
-
-	        // moving forward or backward along way?
-	        var p1 = [prev.loc, orig.loc, moved.loc, next.loc].map(projection);
-	        var p2 = [prev.loc, moved.loc, orig.loc, next.loc].map(projection);
-	        var d1 = geoPathLength(p1);
-	        var d2 = geoPathLength(p2);
-	        var insertAt = (d1 <= d2) ? movedIndex : nextIndex;
-
-	        // moving around closed loop?
-	        if (way.isClosed() && insertAt === 0) { insertAt = len; }
-
-	        way = way.addNode(orig.id, insertAt);
-	        return graph.replace(orig).replace(way);
-	    }
-
-
-	    // Remove duplicate vertex that might have been added by
-	    // replaceMovedVertex.  This is done after the unzorro checks.
-	    function removeDuplicateVertices(wayId, graph) {
-	        var way = graph.entity(wayId);
-	        var epsilon = 1e-6;
-	        var prev, curr;
-
-	        function isInteresting(node, graph) {
-	            return graph.parentWays(node).length > 1 ||
-	                graph.parentRelations(node).length ||
-	                node.hasInterestingTags();
-	        }
-
-	        for (var i = 0; i < way.nodes.length; i++) {
-	            curr = graph.entity(way.nodes[i]);
-
-	            if (prev && curr && geoVecEqual(prev.loc, curr.loc, epsilon)) {
-	                if (!isInteresting(prev, graph)) {
-	                    way = way.removeNode(prev.id);
-	                    graph = graph.replace(way).remove(prev);
-	                } else if (!isInteresting(curr, graph)) {
-	                    way = way.removeNode(curr.id);
-	                    graph = graph.replace(way).remove(curr);
-	                }
-	            }
-
-	            prev = curr;
-	        }
-
-	        return graph;
-	    }
-
-
-	    // Reorder nodes around intersections that have moved..
-	    //
-	    //  Start:                way1.nodes: b,e         (moving)
-	    //  a - b - c ----- d     way2.nodes: a,b,c,d     (static)
-	    //      |                 vertex: b
-	    //      e                 isEP1: true,  isEP2, false
-	    //
-	    //  way1 `b,e` moved here:
-	    //  a ----- c = b - d
-	    //              |
-	    //              e
-	    //
-	    //  reorder nodes         way1.nodes: b,e
-	    //  a ----- c - b - d     way2.nodes: a,c,b,d
-	    //              |
-	    //              e
-	    //
-	    function unZorroIntersection(intersection, graph) {
-	        var vertex = graph.entity(intersection.nodeId);
-	        var way1 = graph.entity(intersection.movedId);
-	        var way2 = graph.entity(intersection.unmovedId);
-	        var isEP1 = intersection.movedIsEP;
-	        var isEP2 = intersection.unmovedIsEP;
-
-	        // don't move the vertex if it is the endpoint of both ways.
-	        if (isEP1 && isEP2) { return graph; }
-
-	        var nodes1 = graph.childNodes(way1).filter(function(n) { return n !== vertex; });
-	        var nodes2 = graph.childNodes(way2).filter(function(n) { return n !== vertex; });
-
-	        if (way1.isClosed() && way1.first() === vertex.id) { nodes1.push(nodes1[0]); }
-	        if (way2.isClosed() && way2.first() === vertex.id) { nodes2.push(nodes2[0]); }
-
-	        var edge1 = !isEP1 && geoChooseEdge(nodes1, projection(vertex.loc), projection);
-	        var edge2 = !isEP2 && geoChooseEdge(nodes2, projection(vertex.loc), projection);
-	        var loc;
-
-	        // snap vertex to nearest edge (or some point between them)..
-	        if (!isEP1 && !isEP2) {
-	            var epsilon = 1e-6, maxIter = 10;
-	            for (var i = 0; i < maxIter; i++) {
-	                loc = geoVecInterp(edge1.loc, edge2.loc, 0.5);
-	                edge1 = geoChooseEdge(nodes1, projection(loc), projection);
-	                edge2 = geoChooseEdge(nodes2, projection(loc), projection);
-	                if (Math.abs(edge1.distance - edge2.distance) < epsilon) { break; }
-	            }
-	        } else if (!isEP1) {
-	            loc = edge1.loc;
-	        } else {
-	            loc = edge2.loc;
-	        }
-
-	        graph = graph.replace(vertex.move(loc));
-
-	        // if zorro happened, reorder nodes..
-	        if (!isEP1 && edge1.index !== way1.nodes.indexOf(vertex.id)) {
-	            way1 = way1.removeNode(vertex.id).addNode(vertex.id, edge1.index);
-	            graph = graph.replace(way1);
-	        }
-	        if (!isEP2 && edge2.index !== way2.nodes.indexOf(vertex.id)) {
-	            way2 = way2.removeNode(vertex.id).addNode(vertex.id, edge2.index);
-	            graph = graph.replace(way2);
-	        }
-
-	        return graph;
-	    }
-
-
-	    function cleanupIntersections(graph) {
-	        for (var i = 0; i < cache.intersections.length; i++) {
-	            var obj = cache.intersections[i];
-	            graph = replaceMovedVertex(obj.nodeId, obj.movedId, graph, _delta);
-	            graph = replaceMovedVertex(obj.nodeId, obj.unmovedId, graph, null);
-	            graph = unZorroIntersection(obj, graph);
-	            graph = removeDuplicateVertices(obj.movedId, graph);
-	            graph = removeDuplicateVertices(obj.unmovedId, graph);
-	        }
-
-	        return graph;
-	    }
-
-
-	    // check if moving way endpoint can cross an unmoved way, if so limit delta..
-	    function limitDelta(graph) {
-	        function moveNode(loc) {
-	            return geoVecAdd(projection(loc), _delta);
-	        }
-
-	        for (var i = 0; i < cache.intersections.length; i++) {
-	            var obj = cache.intersections[i];
-
-	            // Don't limit movement if this is vertex joins 2 endpoints..
-	            if (obj.movedIsEP && obj.unmovedIsEP) { continue; }
-	            // Don't limit movement if this vertex is not an endpoint anyway..
-	            if (!obj.movedIsEP) { continue; }
-
-	            var node = graph.entity(obj.nodeId);
-	            var start = projection(node.loc);
-	            var end = geoVecAdd(start, _delta);
-	            var movedNodes = graph.childNodes(graph.entity(obj.movedId));
-	            var movedPath = movedNodes.map(function(n) { return moveNode(n.loc); });
-	            var unmovedNodes = graph.childNodes(graph.entity(obj.unmovedId));
-	            var unmovedPath = unmovedNodes.map(function(n) { return projection(n.loc); });
-	            var hits = geoPathIntersections(movedPath, unmovedPath);
-
-	            for (var j = 0; i < hits.length; i++) {
-	                if (geoVecEqual(hits[j], end)) { continue; }
-	                var edge = geoChooseEdge(unmovedNodes, end, projection);
-	                _delta = geoVecSubtract(projection(edge.loc), start);
-	            }
-	        }
-	    }
-
-
-	    var action = function(graph) {
-	        if (_delta[0] === 0 && _delta[1] === 0) { return graph; }
-
-	        setupCache(graph);
-
-	        if (cache.intersections.length) {
-	            limitDelta(graph);
-	        }
-
-	        for (var i = 0; i < cache.nodes.length; i++) {
-	            var node = graph.entity(cache.nodes[i]);
-	            var start = projection(node.loc);
-	            var end = geoVecAdd(start, _delta);
-	            graph = graph.replace(node.move(projection.invert(end)));
-	        }
-
-	        if (cache.intersections.length) {
-	            graph = cleanupIntersections(graph);
-	        }
-
-	        return graph;
-	    };
-
-
-	    action.delta = function() {
-	        return _delta;
-	    };
-
-
-	    return action;
-	}
-
-	function actionMoveMember(relationId, fromIndex, toIndex) {
-	    return function(graph) {
-	        return graph.replace(graph.entity(relationId).moveMember(fromIndex, toIndex));
-	    };
-	}
-
-	function actionMoveNode(nodeID, toLoc) {
-
-	    var action = function(graph, t) {
-	        if (t === null || !isFinite(t)) { t = 1; }
-	        t = Math.min(Math.max(+t, 0), 1);
-
-	        var node = graph.entity(nodeID);
-	        return graph.replace(
-	            node.move(geoVecInterp(node.loc, toLoc, t))
-	        );
-	    };
-
-	    action.transitionable = true;
-
-	    return action;
-	}
-
-	function actionNoop() {
-	    return function(graph) {
-	        return graph;
-	    };
-	}
-
-	function actionOrthogonalize(wayID, projection, vertexID, degThresh, ep) {
-	    var epsilon = ep || 1e-4;
-	    var threshold = degThresh || 13;  // degrees within right or straight to alter
-
-	    // We test normalized dot products so we can compare as cos(angle)
-	    var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
-	    var upperThreshold = Math.cos(threshold * Math.PI / 180);
-
-
-	    var action = function(graph, t) {
-	        if (t === null || !isFinite(t)) { t = 1; }
-	        t = Math.min(Math.max(+t, 0), 1);
-
-	        var way = graph.entity(wayID);
-	        way = way.removeNode('');   // sanity check - remove any consecutive duplicates
-
-	        if (way.tags.nonsquare) {
-	            var tags = Object.assign({}, way.tags);
-	            // since we're squaring, remove indication that this is physically unsquare
-	            delete tags.nonsquare;
-	            way = way.update({tags: tags});
-	        }
-
-	        graph = graph.replace(way);
-
-	        var isClosed = way.isClosed();
-	        var nodes = graph.childNodes(way).slice();  // shallow copy
-	        if (isClosed) { nodes.pop(); }
-
-	        if (vertexID !== undefined) {
-	            nodes = nodeSubset(nodes, vertexID, isClosed);
-	            if (nodes.length !== 3) { return graph; }
-	        }
-
-	        // note: all geometry functions here use the unclosed node/point/coord list
-
-	        var nodeCount = {};
-	        var points = [];
-	        var corner = { i: 0, dotp: 1 };
-	        var node, point, loc, score, motions, i, j;
-
-	        for (i = 0; i < nodes.length; i++) {
-	            node = nodes[i];
-	            nodeCount[node.id] = (nodeCount[node.id] || 0) + 1;
-	            points.push({ id: node.id, coord: projection(node.loc) });
-	        }
-
-
-	        if (points.length === 3) {   // move only one vertex for right triangle
-	            for (i = 0; i < 1000; i++) {
-	                motions = points.map(calcMotion);
-
-	                points[corner.i].coord = geoVecAdd(points[corner.i].coord, motions[corner.i]);
-	                score = corner.dotp;
-	                if (score < epsilon) {
-	                    break;
-	                }
-	            }
+	function styleFunction$1(name, value, priority) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    if (v == null) this.style.removeProperty(name);else this.style.setProperty(name, v, priority);
+	  };
+	}
 
-	            node = graph.entity(nodes[corner.i].id);
-	            loc = projection.invert(points[corner.i].coord);
-	            graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
+	function selection_style (name, value, priority) {
+	  return arguments.length > 1 ? this.each((value == null ? styleRemove$1 : typeof value === "function" ? styleFunction$1 : styleConstant$1)(name, value, priority == null ? "" : priority)) : styleValue(this.node(), name);
+	}
+	function styleValue(node, name) {
+	  return node.style.getPropertyValue(name) || defaultView(node).getComputedStyle(node, null).getPropertyValue(name);
+	}
 
-	        } else {
-	            var straights = [];
-	            var simplified = [];
-
-	            // Remove points from nearly straight sections..
-	            // This produces a simplified shape to orthogonalize
-	            for (i = 0; i < points.length; i++) {
-	                point = points[i];
-	                var dotp = 0;
-	                if (isClosed || (i > 0 && i < points.length - 1)) {
-	                    var a = points[(i - 1 + points.length) % points.length];
-	                    var b = points[(i + 1) % points.length];
-	                    dotp = Math.abs(geoOrthoNormalizedDotProduct(a.coord, b.coord, point.coord));
-	                }
+	function propertyRemove(name) {
+	  return function () {
+	    delete this[name];
+	  };
+	}
 
-	                if (dotp > upperThreshold) {
-	                    straights.push(point);
-	                } else {
-	                    simplified.push(point);
-	                }
-	            }
+	function propertyConstant(name, value) {
+	  return function () {
+	    this[name] = value;
+	  };
+	}
 
-	            // Orthogonalize the simplified shape
-	            var bestPoints = clonePoints(simplified);
-	            var originalPoints = clonePoints(simplified);
+	function propertyFunction(name, value) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    if (v == null) delete this[name];else this[name] = v;
+	  };
+	}
 
-	            score = Infinity;
-	            for (i = 0; i < 1000; i++) {
-	                motions = simplified.map(calcMotion);
+	function selection_property (name, value) {
+	  return arguments.length > 1 ? this.each((value == null ? propertyRemove : typeof value === "function" ? propertyFunction : propertyConstant)(name, value)) : this.node()[name];
+	}
 
-	                for (j = 0; j < motions.length; j++) {
-	                    simplified[j].coord = geoVecAdd(simplified[j].coord, motions[j]);
-	                }
-	                var newScore = geoOrthoCalcScore(simplified, isClosed, epsilon, threshold);
-	                if (newScore < score) {
-	                    bestPoints = clonePoints(simplified);
-	                    score = newScore;
-	                }
-	                if (score < epsilon) {
-	                    break;
-	                }
-	            }
+	function classArray(string) {
+	  return string.trim().split(/^|\s+/);
+	}
 
-	            var bestCoords = bestPoints.map(function(p) { return p.coord; });
-	            if (isClosed) { bestCoords.push(bestCoords[0]); }
+	function classList(node) {
+	  return node.classList || new ClassList(node);
+	}
 
-	            // move the nodes that should move
-	            for (i = 0; i < bestPoints.length; i++) {
-	                point = bestPoints[i];
-	                if (!geoVecEqual(originalPoints[i].coord, point.coord)) {
-	                    node = graph.entity(point.id);
-	                    loc = projection.invert(point.coord);
-	                    graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
-	                }
-	            }
+	function ClassList(node) {
+	  this._node = node;
+	  this._names = classArray(node.getAttribute("class") || "");
+	}
 
-	            // move the nodes along straight segments
-	            for (i = 0; i < straights.length; i++) {
-	                point = straights[i];
-	                if (nodeCount[point.id] > 1) { continue; }   // skip self-intersections
+	ClassList.prototype = {
+	  add: function add(name) {
+	    var i = this._names.indexOf(name);
 
-	                node = graph.entity(point.id);
+	    if (i < 0) {
+	      this._names.push(name);
 
-	                if (t === 1 &&
-	                    graph.parentWays(node).length === 1 &&
-	                    graph.parentRelations(node).length === 0 &&
-	                    !node.hasInterestingTags()
-	                ) {
-	                    // remove uninteresting points..
-	                    graph = actionDeleteNode(node.id)(graph);
+	      this._node.setAttribute("class", this._names.join(" "));
+	    }
+	  },
+	  remove: function remove(name) {
+	    var i = this._names.indexOf(name);
 
-	                } else {
-	                    // move interesting points to the nearest edge..
-	                    var choice = geoVecProject(point.coord, bestCoords);
-	                    if (choice) {
-	                        loc = projection.invert(choice.target);
-	                        graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
-	                    }
-	                }
-	            }
-	        }
+	    if (i >= 0) {
+	      this._names.splice(i, 1);
 
-	        return graph;
+	      this._node.setAttribute("class", this._names.join(" "));
+	    }
+	  },
+	  contains: function contains(name) {
+	    return this._names.indexOf(name) >= 0;
+	  }
+	};
 
+	function classedAdd(node, names) {
+	  var list = classList(node),
+	      i = -1,
+	      n = names.length;
 
-	        function clonePoints(array) {
-	            return array.map(function(p) {
-	                return { id: p.id, coord: [p.coord[0], p.coord[1]] };
-	            });
-	        }
+	  while (++i < n) {
+	    list.add(names[i]);
+	  }
+	}
 
+	function classedRemove(node, names) {
+	  var list = classList(node),
+	      i = -1,
+	      n = names.length;
 
-	        function calcMotion(point, i, array) {
-	            // don't try to move the endpoints of a non-closed way.
-	            if (!isClosed && (i === 0 || i === array.length - 1)) { return [0, 0]; }
-	            // don't try to move a node that appears more than once (self intersection)
-	            if (nodeCount[array[i].id] > 1) { return [0, 0]; }
+	  while (++i < n) {
+	    list.remove(names[i]);
+	  }
+	}
 
-	            var a = array[(i - 1 + array.length) % array.length].coord;
-	            var origin = point.coord;
-	            var b = array[(i + 1) % array.length].coord;
-	            var p = geoVecSubtract(a, origin);
-	            var q = geoVecSubtract(b, origin);
+	function classedTrue(names) {
+	  return function () {
+	    classedAdd(this, names);
+	  };
+	}
 
-	            var scale = 2 * Math.min(geoVecLength(p), geoVecLength(q));
-	            p = geoVecNormalize(p);
-	            q = geoVecNormalize(q);
+	function classedFalse(names) {
+	  return function () {
+	    classedRemove(this, names);
+	  };
+	}
 
-	            var dotp = (p[0] * q[0] + p[1] * q[1]);
-	            var val = Math.abs(dotp);
+	function classedFunction(names, value) {
+	  return function () {
+	    (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);
+	  };
+	}
 
-	            if (val < lowerThreshold) {  // nearly orthogonal
-	                corner.i = i;
-	                corner.dotp = val;
-	                var vec = geoVecNormalize(geoVecAdd(p, q));
-	                return geoVecScale(vec, 0.1 * dotp * scale);
-	            }
+	function selection_classed (name, value) {
+	  var names = classArray(name + "");
 
-	            return [0, 0];   // do nothing
-	        }
-	    };
+	  if (arguments.length < 2) {
+	    var list = classList(this.node()),
+	        i = -1,
+	        n = names.length;
 
+	    while (++i < n) {
+	      if (!list.contains(names[i])) return false;
+	    }
 
-	    // if we are only orthogonalizing one vertex,
-	    // get that vertex and the previous and next
-	    function nodeSubset(nodes, vertexID, isClosed) {
-	        var first = isClosed ? 0 : 1;
-	        var last = isClosed ? nodes.length : nodes.length - 1;
+	    return true;
+	  }
 
-	        for (var i = first; i < last; i++) {
-	            if (nodes[i].id === vertexID) {
-	                return [
-	                    nodes[(i - 1 + nodes.length) % nodes.length],
-	                    nodes[i],
-	                    nodes[(i + 1) % nodes.length]
-	                ];
-	            }
-	        }
+	  return this.each((typeof value === "function" ? classedFunction : value ? classedTrue : classedFalse)(names, value));
+	}
 
-	        return [];
-	    }
+	function textRemove() {
+	  this.textContent = "";
+	}
 
+	function textConstant$1(value) {
+	  return function () {
+	    this.textContent = value;
+	  };
+	}
 
-	    action.disabled = function(graph) {
-	        var way = graph.entity(wayID);
-	        way = way.removeNode('');  // sanity check - remove any consecutive duplicates
-	        graph = graph.replace(way);
+	function textFunction$1(value) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    this.textContent = v == null ? "" : v;
+	  };
+	}
 
-	        var isClosed = way.isClosed();
-	        var nodes = graph.childNodes(way).slice();  // shallow copy
-	        if (isClosed) { nodes.pop(); }
+	function selection_text (value) {
+	  return arguments.length ? this.each(value == null ? textRemove : (typeof value === "function" ? textFunction$1 : textConstant$1)(value)) : this.node().textContent;
+	}
 
-	        var allowStraightAngles = false;
-	        if (vertexID !== undefined) {
-	            allowStraightAngles = true;
-	            nodes = nodeSubset(nodes, vertexID, isClosed);
-	            if (nodes.length !== 3) { return 'end_vertex'; }
-	        }
+	function htmlRemove() {
+	  this.innerHTML = "";
+	}
 
-	        var coords = nodes.map(function(n) { return projection(n.loc); });
-	        var score = geoOrthoCanOrthogonalize(coords, isClosed, epsilon, threshold, allowStraightAngles);
+	function htmlConstant(value) {
+	  return function () {
+	    this.innerHTML = value;
+	  };
+	}
 
-	        if (score === null) {
-	            return 'not_squarish';
-	        } else if (score === 0) {
-	            return 'square_enough';
-	        } else {
-	            return false;
-	        }
-	    };
+	function htmlFunction(value) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    this.innerHTML = v == null ? "" : v;
+	  };
+	}
 
+	function selection_html (value) {
+	  return arguments.length ? this.each(value == null ? htmlRemove : (typeof value === "function" ? htmlFunction : htmlConstant)(value)) : this.node().innerHTML;
+	}
 
-	    action.transitionable = true;
+	function raise() {
+	  if (this.nextSibling) this.parentNode.appendChild(this);
+	}
 
-	    return action;
+	function selection_raise () {
+	  return this.each(raise);
 	}
 
-	// `actionRestrictTurn` creates a turn restriction relation.
-	//
-	// `turn` must be an `osmTurn` object
-	// see osm/intersection.js, pathToTurn()
-	//
-	// This specifies a restriction of type `restriction` when traveling from
-	// `turn.from.way` toward `turn.to.way` via `turn.via.node` OR `turn.via.ways`.
-	// (The action does not check that these entities form a valid intersection.)
-	//
-	// From, to, and via ways should be split before calling this action.
-	// (old versions of the code would split the ways here, but we no longer do it)
-	//
-	// For testing convenience, accepts a restrictionID to assign to the new
-	// relation. Normally, this will be undefined and the relation will
-	// automatically be assigned a new ID.
-	//
-	function actionRestrictTurn(turn, restrictionType, restrictionID) {
+	function lower() {
+	  if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild);
+	}
 
-	    return function(graph) {
-	        var fromWay = graph.entity(turn.from.way);
-	        var toWay = graph.entity(turn.to.way);
-	        var viaNode = turn.via.node && graph.entity(turn.via.node);
-	        var viaWays = turn.via.ways && turn.via.ways.map(function(id) { return graph.entity(id); });
-	        var members = [];
+	function selection_lower () {
+	  return this.each(lower);
+	}
 
-	        members.push({ id: fromWay.id, type: 'way',  role: 'from' });
+	function selection_append (name) {
+	  var create = typeof name === "function" ? name : creator(name);
+	  return this.select(function () {
+	    return this.appendChild(create.apply(this, arguments));
+	  });
+	}
 
-	        if (viaNode) {
-	            members.push({ id: viaNode.id,  type: 'node', role: 'via' });
-	        } else if (viaWays) {
-	            viaWays.forEach(function(viaWay) {
-	                members.push({ id: viaWay.id,  type: 'way', role: 'via' });
-	            });
-	        }
+	function constantNull() {
+	  return null;
+	}
 
-	        members.push({ id: toWay.id, type: 'way',  role: 'to' });
+	function selection_insert (name, before) {
+	  var create = typeof name === "function" ? name : creator(name),
+	      select = before == null ? constantNull : typeof before === "function" ? before : selector(before);
+	  return this.select(function () {
+	    return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);
+	  });
+	}
 
-	        return graph.replace(osmRelation({
-	            id: restrictionID,
-	            tags: {
-	                type: 'restriction',
-	                restriction: restrictionType
-	            },
-	            members: members
-	        }));
-	    };
+	function remove$7() {
+	  var parent = this.parentNode;
+	  if (parent) parent.removeChild(this);
 	}
 
-	function actionRevert(id) {
-	    var action = function(graph) {
-	        var entity = graph.hasEntity(id),
-	            base = graph.base().entities[id];
-
-	        if (entity && !base) {    // entity will be removed..
-	            if (entity.type === 'node') {
-	                graph.parentWays(entity)
-	                    .forEach(function(parent) {
-	                        parent = parent.removeNode(id);
-	                        graph = graph.replace(parent);
-
-	                        if (parent.isDegenerate()) {
-	                            graph = actionDeleteWay(parent.id)(graph);
-	                        }
-	                    });
-	            }
+	function selection_remove () {
+	  return this.each(remove$7);
+	}
 
-	            graph.parentRelations(entity)
-	                .forEach(function(parent) {
-	                    parent = parent.removeMembersWithID(id);
-	                    graph = graph.replace(parent);
+	function selection_cloneShallow() {
+	  var clone = this.cloneNode(false),
+	      parent = this.parentNode;
+	  return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
+	}
 
-	                    if (parent.isDegenerate()) {
-	                        graph = actionDeleteRelation(parent.id)(graph);
-	                    }
-	                });
-	        }
+	function selection_cloneDeep() {
+	  var clone = this.cloneNode(true),
+	      parent = this.parentNode;
+	  return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
+	}
 
-	        return graph.revert(id);
-	    };
+	function selection_clone (deep) {
+	  return this.select(deep ? selection_cloneDeep : selection_cloneShallow);
+	}
 
-	    return action;
+	function selection_datum (value) {
+	  return arguments.length ? this.property("__data__", value) : this.node().__data__;
 	}
 
-	function actionRotate(rotateIds, pivot, angle, projection) {
+	function contextListener(listener) {
+	  return function (event) {
+	    listener.call(this, event, this.__data__);
+	  };
+	}
 
-	    var action = function(graph) {
-	        return graph.update(function(graph) {
-	            utilGetAllNodes(rotateIds, graph).forEach(function(node) {
-	                var point = geoRotate([projection(node.loc)], angle, pivot)[0];
-	                graph = graph.replace(node.move(projection.invert(point)));
-	            });
-	        });
+	function parseTypenames(typenames) {
+	  return typenames.trim().split(/^|\s+/).map(function (t) {
+	    var name = "",
+	        i = t.indexOf(".");
+	    if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
+	    return {
+	      type: t,
+	      name: name
 	    };
-
-	    return action;
+	  });
 	}
 
-	/* Align nodes along their common axis */
-	function actionStraightenNodes(nodeIDs, projection) {
+	function onRemove(typename) {
+	  return function () {
+	    var on = this.__on;
+	    if (!on) return;
 
-	    function positionAlongWay(a, o, b) {
-	        return geoVecDot(a, b, o) / geoVecDot(b, b, o);
+	    for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {
+	      if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {
+	        this.removeEventListener(o.type, o.listener, o.options);
+	      } else {
+	        on[++i] = o;
+	      }
 	    }
 
-	    // returns the endpoints of the long axis of symmetry of the `points` bounding rect 
-	    function getEndpoints(points) {
-	        var ssr = geoGetSmallestSurroundingRectangle(points);
-
-	        // Choose line pq = axis of symmetry.
-	        // The shape's surrounding rectangle has 2 axes of symmetry.
-	        // Snap points to the long axis
-	        var p1 = [(ssr.poly[0][0] + ssr.poly[1][0]) / 2, (ssr.poly[0][1] + ssr.poly[1][1]) / 2 ];
-	        var q1 = [(ssr.poly[2][0] + ssr.poly[3][0]) / 2, (ssr.poly[2][1] + ssr.poly[3][1]) / 2 ];
-	        var p2 = [(ssr.poly[3][0] + ssr.poly[4][0]) / 2, (ssr.poly[3][1] + ssr.poly[4][1]) / 2 ];
-	        var q2 = [(ssr.poly[1][0] + ssr.poly[2][0]) / 2, (ssr.poly[1][1] + ssr.poly[2][1]) / 2 ];
+	    if (++i) on.length = i;else delete this.__on;
+	  };
+	}
 
-	        var isLong = (geoVecLength(p1, q1) > geoVecLength(p2, q2));
-	        if (isLong) {
-	            return [p1, q1];
-	        }
-	        return [p2, q2];
+	function onAdd(typename, value, options) {
+	  return function () {
+	    var on = this.__on,
+	        o,
+	        listener = contextListener(value);
+	    if (on) for (var j = 0, m = on.length; j < m; ++j) {
+	      if ((o = on[j]).type === typename.type && o.name === typename.name) {
+	        this.removeEventListener(o.type, o.listener, o.options);
+	        this.addEventListener(o.type, o.listener = listener, o.options = options);
+	        o.value = value;
+	        return;
+	      }
 	    }
-
-
-	    var action = function(graph, t) {
-	        if (t === null || !isFinite(t)) { t = 1; }
-	        t = Math.min(Math.max(+t, 0), 1);
-
-	        var nodes = nodeIDs.map(function(id) { return graph.entity(id); });
-	        var points = nodes.map(function(n) { return projection(n.loc); });
-	        var endpoints = getEndpoints(points);
-	        var startPoint = endpoints[0];
-	        var endPoint = endpoints[1];
-
-	        // Move points onto the line connecting the endpoints
-	        for (var i = 0; i < points.length; i++) {
-	            var node = nodes[i];
-	            var point = points[i];
-	            var u = positionAlongWay(point, startPoint, endPoint);
-	            var point2 = geoVecInterp(startPoint, endPoint, u);
-	            var loc2 = projection.invert(point2);
-	            graph = graph.replace(node.move(geoVecInterp(node.loc, loc2, t)));
-	        }
-
-	        return graph;
-	    };
-
-
-	    action.disabled = function(graph) {
-
-	        var nodes = nodeIDs.map(function(id) { return graph.entity(id); });
-	        var points = nodes.map(function(n) { return projection(n.loc); });
-	        var endpoints = getEndpoints(points);
-	        var startPoint = endpoints[0];
-	        var endPoint = endpoints[1];
-
-	        var maxDistance = 0;
-
-	        for (var i = 0; i < points.length; i++) {
-	            var point = points[i];
-	            var u = positionAlongWay(point, startPoint, endPoint);
-	            var p = geoVecInterp(startPoint, endPoint, u);
-	            var dist = geoVecLength(p, point);
-
-	            if (!isNaN(dist) && dist > maxDistance) {
-	                maxDistance = dist;
-	            }
-	        }
-
-	        if (maxDistance < 0.0001) {
-	            return 'straight_enough';
-	        }
+	    this.addEventListener(typename.type, listener, options);
+	    o = {
+	      type: typename.type,
+	      name: typename.name,
+	      value: value,
+	      listener: listener,
+	      options: options
 	    };
-
-
-	    action.transitionable = true;
-
-
-	    return action;
+	    if (!on) this.__on = [o];else on.push(o);
+	  };
 	}
 
-	/*
-	 * Based on https://github.com/openstreetmap/potlatch2/net/systemeD/potlatch2/tools/Straighten.as
-	 */
-	function actionStraightenWay(selectedIDs, projection) {
-
-	    function positionAlongWay(a, o, b) {
-	        return geoVecDot(a, b, o) / geoVecDot(b, b, o);
-	    }
-
-	    // Return all selected ways as a continuous, ordered array of nodes
-	    function allNodes(graph) {
-	        var nodes = [];
-	        var startNodes = [];
-	        var endNodes = [];
-	        var remainingWays = [];
-	        var selectedWays = selectedIDs.filter(function(w) {
-	            return graph.entity(w).type === 'way';
-	        });
-	        var selectedNodes = selectedIDs.filter(function(n) {
-	            return graph.entity(n).type === 'node';
-	        });
-
-	        for (var i = 0; i < selectedWays.length; i++) {
-	            var way = graph.entity(selectedWays[i]);
-	            nodes = way.nodes.slice(0);
-	            remainingWays.push(nodes);
-	            startNodes.push(nodes[0]);
-	            endNodes.push(nodes[nodes.length-1]);
-	        }
-
-	        // Remove duplicate end/startNodes (duplicate nodes cannot be at the line end,
-	        //   and need to be removed so currNode difference calculation below works)
-	        // i.e. ["n-1", "n-1", "n-2"] => ["n-2"]
-	        startNodes = startNodes.filter(function(n) {
-	            return startNodes.indexOf(n) === startNodes.lastIndexOf(n);
-	        });
-	        endNodes = endNodes.filter(function(n) {
-	            return endNodes.indexOf(n) === endNodes.lastIndexOf(n);
-	        });
-
-	        // Choose the initial endpoint to start from
-	        var currNode = utilArrayDifference(startNodes, endNodes)
-	            .concat(utilArrayDifference(endNodes, startNodes))[0];
-	        var nextWay = [];
-	        nodes = [];
-
-	        // Create nested function outside of loop to avoid "function in loop" lint error
-	        var getNextWay = function(currNode, remainingWays) {
-	            return remainingWays.filter(function(way) {
-	                return way[0] === currNode || way[way.length-1] === currNode;
-	            })[0];
-	        };
-
-	        // Add nodes to end of nodes array, until all ways are added
-	        while (remainingWays.length) {
-	            nextWay = getNextWay(currNode, remainingWays);
-	            remainingWays = utilArrayDifference(remainingWays, [nextWay]);
-
-	            if (nextWay[0] !== currNode) {
-	                nextWay.reverse();
-	            }
-	            nodes = nodes.concat(nextWay);
-	            currNode = nodes[nodes.length-1];
-	        }
+	function selection_on (typename, value, options) {
+	  var typenames = parseTypenames(typename + ""),
+	      i,
+	      n = typenames.length,
+	      t;
 
-	        // If user selected 2 nodes to straighten between, then slice nodes array to those nodes
-	        if (selectedNodes.length === 2) {
-	            var startNodeIdx = nodes.indexOf(selectedNodes[0]);
-	            var endNodeIdx = nodes.indexOf(selectedNodes[1]);
-	            var sortedStartEnd = [startNodeIdx, endNodeIdx];
+	  if (arguments.length < 2) {
+	    var on = this.node().__on;
 
-	            sortedStartEnd.sort(function(a, b) { return a - b; });
-	            nodes = nodes.slice(sortedStartEnd[0], sortedStartEnd[1]+1);
+	    if (on) for (var j = 0, m = on.length, o; j < m; ++j) {
+	      for (i = 0, o = on[j]; i < n; ++i) {
+	        if ((t = typenames[i]).type === o.type && t.name === o.name) {
+	          return o.value;
 	        }
-
-	        return nodes.map(function(n) { return graph.entity(n); });
-	    }
-
-	    function shouldKeepNode(node, graph) {
-	        return graph.parentWays(node).length > 1 ||
-	            graph.parentRelations(node).length ||
-	            node.hasInterestingTags();
+	      }
 	    }
+	    return;
+	  }
 
+	  on = value ? onAdd : onRemove;
 
-	    var action = function(graph, t) {
-	        if (t === null || !isFinite(t)) { t = 1; }
-	        t = Math.min(Math.max(+t, 0), 1);
+	  for (i = 0; i < n; ++i) {
+	    this.each(on(typenames[i], value, options));
+	  }
 
-	        var nodes = allNodes(graph);
-	        var points = nodes.map(function(n) { return projection(n.loc); });
-	        var startPoint = points[0];
-	        var endPoint = points[points.length-1];
-	        var toDelete = [];
-	        var i;
+	  return this;
+	}
 
-	        for (i = 1; i < points.length-1; i++) {
-	            var node = nodes[i];
-	            var point = points[i];
+	function dispatchEvent(node, type, params) {
+	  var window = defaultView(node),
+	      event = window.CustomEvent;
 
-	            if (t < 1 || shouldKeepNode(node, graph)) {
-	                var u = positionAlongWay(point, startPoint, endPoint);
-	                var p = geoVecInterp(startPoint, endPoint, u);
-	                var loc2 = projection.invert(p);
-	                graph = graph.replace(node.move(geoVecInterp(node.loc, loc2, t)));
+	  if (typeof event === "function") {
+	    event = new event(type, params);
+	  } else {
+	    event = window.document.createEvent("Event");
+	    if (params) event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail;else event.initEvent(type, false, false);
+	  }
 
-	            } else {
-	                // safe to delete
-	                if (toDelete.indexOf(node) === -1) {
-	                    toDelete.push(node);
-	                }
-	            }
-	        }
+	  node.dispatchEvent(event);
+	}
 
-	        for (i = 0; i < toDelete.length; i++) {
-	            graph = actionDeleteNode(toDelete[i].id)(graph);
-	        }
+	function dispatchConstant(type, params) {
+	  return function () {
+	    return dispatchEvent(this, type, params);
+	  };
+	}
 
-	        return graph;
-	    };
+	function dispatchFunction(type, params) {
+	  return function () {
+	    return dispatchEvent(this, type, params.apply(this, arguments));
+	  };
+	}
 
+	function selection_dispatch (type, params) {
+	  return this.each((typeof params === "function" ? dispatchFunction : dispatchConstant)(type, params));
+	}
 
-	    action.disabled = function(graph) {
-	        // check way isn't too bendy
-	        var nodes = allNodes(graph);
-	        var points = nodes.map(function(n) { return projection(n.loc); });
-	        var startPoint = points[0];
-	        var endPoint = points[points.length-1];
-	        var threshold = 0.2 * geoVecLength(startPoint, endPoint);
-	        var i;
+	var _marked$1 = /*#__PURE__*/regeneratorRuntime.mark(_callee);
 
-	        if (threshold === 0) {
-	            return 'too_bendy';
-	        }
+	function _callee() {
+	  var groups, j, m, group, i, n, node;
+	  return regeneratorRuntime.wrap(function _callee$(_context) {
+	    while (1) {
+	      switch (_context.prev = _context.next) {
+	        case 0:
+	          groups = this._groups, j = 0, m = groups.length;
 
-	        var maxDistance = 0;
+	        case 1:
+	          if (!(j < m)) {
+	            _context.next = 13;
+	            break;
+	          }
 
-	        for (i = 1; i < points.length - 1; i++) {
-	            var point = points[i];
-	            var u = positionAlongWay(point, startPoint, endPoint);
-	            var p = geoVecInterp(startPoint, endPoint, u);
-	            var dist = geoVecLength(p, point);
+	          group = groups[j], i = 0, n = group.length;
 
-	            // to bendy if point is off by 20% of total start/end distance in projected space
-	            if (isNaN(dist) || dist > threshold) {
-	                return 'too_bendy';
-	            } else if (dist > maxDistance) {
-	                maxDistance = dist;
-	            }
-	        }
+	        case 3:
+	          if (!(i < n)) {
+	            _context.next = 10;
+	            break;
+	          }
 
-	        var keepingAllNodes = nodes.every(function(node, i) {
-	            return i === 0 || i === nodes.length - 1 || shouldKeepNode(node, graph);
-	        });
+	          if (!(node = group[i])) {
+	            _context.next = 7;
+	            break;
+	          }
 
-	        if (maxDistance < 0.0001 &&
-	            // Allow straightening even if already straight in order to remove extraneous nodes
-	            keepingAllNodes) {
-	            return 'straight_enough';
-	        }
-	    };
+	          _context.next = 7;
+	          return node;
 
-	    action.transitionable = true;
+	        case 7:
+	          ++i;
+	          _context.next = 3;
+	          break;
 
+	        case 10:
+	          ++j;
+	          _context.next = 1;
+	          break;
 
-	    return action;
+	        case 13:
+	        case "end":
+	          return _context.stop();
+	      }
+	    }
+	  }, _marked$1, this);
 	}
 
-	// `actionUnrestrictTurn` deletes a turn restriction relation.
-	//
-	// `turn` must be an `osmTurn` object with a `restrictionID` property.
-	// see osm/intersection.js, pathToTurn()
-	//
-	function actionUnrestrictTurn(turn) {
-	    return function(graph) {
-	        return actionDeleteRelation(turn.restrictionID)(graph);
-	    };
+	var root$1 = [null];
+	function Selection$1(groups, parents) {
+	  this._groups = groups;
+	  this._parents = parents;
 	}
 
-	/* Reflect the given area around its axis of symmetry */
-	function actionReflect(reflectIds, projection) {
-	    var _useLongAxis = true;
-
-
-	    var action = function(graph, t) {
-	        if (t === null || !isFinite(t)) { t = 1; }
-	        t = Math.min(Math.max(+t, 0), 1);
-
-	        var nodes = utilGetAllNodes(reflectIds, graph);
-	        var points = nodes.map(function(n) { return projection(n.loc); });
-	        var ssr = geoGetSmallestSurroundingRectangle(points);
-
-	        // Choose line pq = axis of symmetry.
-	        // The shape's surrounding rectangle has 2 axes of symmetry.
-	        // Reflect across the longer axis by default.
-	        var p1 = [(ssr.poly[0][0] + ssr.poly[1][0]) / 2, (ssr.poly[0][1] + ssr.poly[1][1]) / 2 ];
-	        var q1 = [(ssr.poly[2][0] + ssr.poly[3][0]) / 2, (ssr.poly[2][1] + ssr.poly[3][1]) / 2 ];
-	        var p2 = [(ssr.poly[3][0] + ssr.poly[4][0]) / 2, (ssr.poly[3][1] + ssr.poly[4][1]) / 2 ];
-	        var q2 = [(ssr.poly[1][0] + ssr.poly[2][0]) / 2, (ssr.poly[1][1] + ssr.poly[2][1]) / 2 ];
-	        var p, q;
-
-	        var isLong = (geoVecLength(p1, q1) > geoVecLength(p2, q2));
-	        if ((_useLongAxis && isLong) || (!_useLongAxis && !isLong)) {
-	            p = p1;
-	            q = q1;
-	        } else {
-	            p = p2;
-	            q = q2;
-	        }
-
-	        // reflect c across pq
-	        // http://math.stackexchange.com/questions/65503/point-reflection-over-a-line
-	        var dx = q[0] - p[0];
-	        var dy = q[1] - p[1];
-	        var a = (dx * dx - dy * dy) / (dx * dx + dy * dy);
-	        var b = 2 * dx * dy / (dx * dx + dy * dy);
-	        for (var i = 0; i < nodes.length; i++) {
-	            var node = nodes[i];
-	            var c = projection(node.loc);
-	            var c2 = [
-	                a * (c[0] - p[0]) + b * (c[1] - p[1]) + p[0],
-	                b * (c[0] - p[0]) - a * (c[1] - p[1]) + p[1]
-	            ];
-	            var loc2 = projection.invert(c2);
-	            node = node.move(geoVecInterp(node.loc, loc2, t));
-	            graph = graph.replace(node);
-	        }
-
-	        return graph;
-	    };
-
-
-	    action.useLongAxis = function(val) {
-	        if (!arguments.length) { return _useLongAxis; }
-	        _useLongAxis = val;
-	        return action;
-	    };
-
-
-	    action.transitionable = true;
-
-
-	    return action;
+	function selection() {
+	  return new Selection$1([[document.documentElement]], root$1);
 	}
 
-	function actionUpgradeTags(entityId, oldTags, replaceTags) {
-
-	    return function(graph) {
-	        var entity = graph.entity(entityId);
-	        var tags = Object.assign({}, entity.tags);  // shallow copy
-	        var transferValue;
-	        var semiIndex;
-
-	        for (var oldTagKey in oldTags) {
-	            if (oldTags[oldTagKey] === '*') {
-	                transferValue = tags[oldTagKey];
-	                delete tags[oldTagKey];
-	            } else {
-	                var vals = tags[oldTagKey].split(';').filter(Boolean);
-	                var oldIndex = vals.indexOf(oldTags[oldTagKey]);
-	                if (vals.length === 1 || oldIndex === -1) {
-	                    delete tags[oldTagKey];
-	                } else {
-	                    if (replaceTags && replaceTags[oldTagKey]) {
-	                        // replacing a value within a semicolon-delimited value, note the index
-	                        semiIndex = oldIndex;
-	                    }
-	                    vals.splice(oldIndex, 1);
-	                    tags[oldTagKey] = vals.join(';');
-	                }
-	            }
-	        }
-
-	        if (replaceTags) {
-	            for (var replaceKey in replaceTags) {
-	                var replaceValue = replaceTags[replaceKey];
-	                if (replaceValue === '*') {
-	                    if (tags[replaceKey] && tags[replaceKey] !== 'no') {
-	                        // allow any pre-existing value except `no` (troll tag)
-	                        continue;
-	                    } else {
-	                        // otherwise assume `yes` is okay
-	                        tags[replaceKey] = 'yes';
-	                    }
-	                } else if (replaceValue === '$1') {
-	                    tags[replaceKey] = transferValue;
-	                } else {
-	                    if (tags[replaceKey] && oldTags[replaceKey] && semiIndex !== undefined) {
-	                        // don't override preexisting values
-	                        var existingVals = tags[replaceKey].split(';').filter(Boolean);
-	                        if (existingVals.indexOf(replaceValue) === -1) {
-	                            existingVals.splice(semiIndex, 0, replaceValue);
-	                            tags[replaceKey] = existingVals.join(';');
-	                        }
-	                    } else {
-	                        tags[replaceKey] = replaceValue;
-	                    }
-	                }
-	            }
-	        }
-
-	        return graph.replace(entity.update({ tags: tags }));
-	    };
+	function selection_selection() {
+	  return this;
 	}
 
-	function behaviorEdit(context) {
-
-	    function behavior() {
-	        context.map()
-	            .minzoom(context.minEditableZoom());
-	    }
-
-
-	    behavior.off = function() {
-	        context.map()
-	            .minzoom(0);
-	    };
+	Selection$1.prototype = selection.prototype = _defineProperty({
+	  constructor: Selection$1,
+	  select: selection_select,
+	  selectAll: selection_selectAll,
+	  selectChild: selection_selectChild,
+	  selectChildren: selection_selectChildren,
+	  filter: selection_filter,
+	  data: selection_data,
+	  enter: selection_enter,
+	  exit: selection_exit,
+	  join: selection_join,
+	  merge: selection_merge,
+	  selection: selection_selection,
+	  order: selection_order,
+	  sort: selection_sort,
+	  call: selection_call,
+	  nodes: selection_nodes,
+	  node: selection_node,
+	  size: selection_size,
+	  empty: selection_empty,
+	  each: selection_each,
+	  attr: selection_attr,
+	  style: selection_style,
+	  property: selection_property,
+	  classed: selection_classed,
+	  text: selection_text,
+	  html: selection_html,
+	  raise: selection_raise,
+	  lower: selection_lower,
+	  append: selection_append,
+	  insert: selection_insert,
+	  remove: selection_remove,
+	  clone: selection_clone,
+	  datum: selection_datum,
+	  on: selection_on,
+	  dispatch: selection_dispatch
+	}, Symbol.iterator, _callee);
 
-	    return behavior;
+	function select (selector) {
+	  return typeof selector === "string" ? new Selection$1([[document.querySelector(selector)]], [document.documentElement]) : new Selection$1([[selector]], root$1);
 	}
 
-	/*
-	   The hover behavior adds the `.hover` class on pointerover to all elements to which
-	   the identical datum is bound, and removes it on pointerout.
-
-	   The :hover pseudo-class is insufficient for iD's purposes because a datum's visual
-	   representation may consist of several elements scattered throughout the DOM hierarchy.
-	   Only one of these elements can have the :hover pseudo-class, but all of them will
-	   have the .hover class.
-	 */
-	function behaviorHover(context) {
-	    var dispatch$1 = dispatch('hover');
-	    var _selection = select(null);
-	    var _newNodeId = null;
-	    var _initialNodeID = null;
-	    var _altDisables;
-	    var _ignoreVertex;
-	    var _targets = [];
+	function sourceEvent (event) {
+	  var sourceEvent;
 
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	  while (sourceEvent = event.sourceEvent) {
+	    event = sourceEvent;
+	  }
 
+	  return event;
+	}
 
-	    function keydown() {
-	        if (_altDisables && event.keyCode === utilKeybinding.modifierCodes.alt) {
-	            _selection.selectAll('.hover')
-	                .classed('hover-suppressed', true)
-	                .classed('hover', false);
+	function pointer (event, node) {
+	  event = sourceEvent(event);
+	  if (node === undefined) node = event.currentTarget;
 
-	            _selection
-	                .classed('hover-disabled', true);
+	  if (node) {
+	    var svg = node.ownerSVGElement || node;
 
-	            dispatch$1.call('hover', this, null);
-	        }
+	    if (svg.createSVGPoint) {
+	      var point = svg.createSVGPoint();
+	      point.x = event.clientX, point.y = event.clientY;
+	      point = point.matrixTransform(node.getScreenCTM().inverse());
+	      return [point.x, point.y];
 	    }
 
-
-	    function keyup() {
-	        if (_altDisables && event.keyCode === utilKeybinding.modifierCodes.alt) {
-	            _selection.selectAll('.hover-suppressed')
-	                .classed('hover-suppressed', false)
-	                .classed('hover', true);
-
-	            _selection
-	                .classed('hover-disabled', false);
-
-	            dispatch$1.call('hover', this, _targets);
-	        }
+	    if (node.getBoundingClientRect) {
+	      var rect = node.getBoundingClientRect();
+	      return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];
 	    }
+	  }
 
+	  return [event.pageX, event.pageY];
+	}
 
-	    function behavior(selection) {
-	        _selection = selection;
-
-	        _targets = [];
-
-	        if (_initialNodeID) {
-	            _newNodeId = _initialNodeID;
-	            _initialNodeID = null;
-	        } else {
-	            _newNodeId = null;
-	        }
-
-	        _selection
-	            .on(_pointerPrefix + 'over.hover', pointerover)
-	            .on(_pointerPrefix + 'out.hover', pointerout)
-	            // treat pointerdown as pointerover for touch devices
-	            .on(_pointerPrefix + 'down.hover', pointerover);
-
-	        select(window)
-	            .on(_pointerPrefix + 'up.hover pointercancel.hover', pointerout, true)
-	            .on('keydown.hover', keydown)
-	            .on('keyup.hover', keyup);
-
-
-	        function eventTarget() {
-	            var datum = event.target && event.target.__data__;
-	            if (typeof datum !== 'object') { return null; }
-	            if (!(datum instanceof osmEntity) && datum.properties && (datum.properties.entity instanceof osmEntity)) {
-	                return datum.properties.entity;
-	            }
-	            return datum;
-	        }
-
-	        function pointerover() {
-	            // ignore mouse hovers with buttons pressed unless dragging
-	            if (context.mode().id.indexOf('drag') === -1 &&
-	                (!event.pointerType || event.pointerType === 'mouse') &&
-	                event.buttons) { return; }
-
-	            var target = eventTarget();
-	            if (target && _targets.indexOf(target) === -1) {
-	                _targets.push(target);
-	                updateHover(_targets);
-	            }
-	        }
-
-	        function pointerout() {
-
-	            var target = eventTarget();
-	            var index = _targets.indexOf(target);
-	            if (index !== -1) {
-	                _targets.splice(index);
-	                updateHover(_targets);
-	            }
-	        }
-
-	        function allowsVertex(d) {
-	            return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
-	        }
-
-	        function modeAllowsHover(target) {
-	            var mode = context.mode();
-	            if (mode.id === 'add-point') {
-	                return mode.preset.matchGeometry('vertex') ||
-	                    (target.type !== 'way' && target.geometry(context.graph()) !== 'vertex');
-	            }
-	            return true;
-	        }
-
-	        function updateHover(targets) {
-
-	            _selection.selectAll('.hover')
-	                .classed('hover', false);
-	            _selection.selectAll('.hover-suppressed')
-	                .classed('hover-suppressed', false);
-
-	            var mode = context.mode();
-
-	            if (!_newNodeId && (mode.id === 'draw-line' || mode.id === 'draw-area')) {
-	                var node = targets.find(function(target) {
-	                    return target instanceof osmEntity && target.type === 'node';
-	                });
-	                _newNodeId = node && node.id;
-	            }
-
-	            targets = targets.filter(function(datum) {
-	                if (datum instanceof osmEntity) {
-	                    // If drawing a way, don't hover on a node that was just placed. #3974
-	                    return datum.id !== _newNodeId &&
-	                        (datum.type !== 'node' || !_ignoreVertex || allowsVertex(datum)) &&
-	                        modeAllowsHover(datum);
-	                }
-	                return true;
-	            });
-
-	            var selector = '';
-
-	            for (var i in targets) {
-	                var datum = targets[i];
-
-	                // What are we hovering over?
-	                if (datum.__featurehash__) {
-	                    // hovering custom data
-	                    selector += ', .data' + datum.__featurehash__;
-
-	                } else if (datum instanceof QAItem) {
-	                    selector += ', .' + datum.service + '.itemId-' + datum.id;
-
-	                } else if (datum instanceof osmNote) {
-	                    selector += ', .note-' + datum.id;
-
-	                } else if (datum instanceof osmEntity) {
-	                    selector += ', .' + datum.id;
-	                    if (datum.type === 'relation') {
-	                        for (var j in datum.members) {
-	                            selector += ', .' + datum.members[j].id;
-	                        }
-	                    }
-	                }
-	            }
-
-	            var suppressed = _altDisables && event && event.altKey;
-
-	            if (selector.trim().length) {
-	                // remove the first comma
-	                selector = selector.slice(1);
-	                _selection.selectAll(selector)
-	                    .classed(suppressed ? 'hover-suppressed' : 'hover', true);
-	            }
+	function selectAll (selector) {
+	  return typeof selector === "string" ? new Selection$1([document.querySelectorAll(selector)], [document.documentElement]) : new Selection$1([selector == null ? [] : array(selector)], root$1);
+	}
 
-	            dispatch$1.call('hover', this, !suppressed && targets);
-	        }
-	    }
+	function nopropagation$1(event) {
+	  event.stopImmediatePropagation();
+	}
+	function noevent$1 (event) {
+	  event.preventDefault();
+	  event.stopImmediatePropagation();
+	}
 
+	function dragDisable (view) {
+	  var root = view.document.documentElement,
+	      selection = select(view).on("dragstart.drag", noevent$1, true);
 
-	    behavior.off = function(selection) {
-	        selection.selectAll('.hover')
-	            .classed('hover', false);
-	        selection.selectAll('.hover-suppressed')
-	            .classed('hover-suppressed', false);
-	        selection
-	            .classed('hover-disabled', false);
+	  if ("onselectstart" in root) {
+	    selection.on("selectstart.drag", noevent$1, true);
+	  } else {
+	    root.__noselect = root.style.MozUserSelect;
+	    root.style.MozUserSelect = "none";
+	  }
+	}
+	function yesdrag(view, noclick) {
+	  var root = view.document.documentElement,
+	      selection = select(view).on("dragstart.drag", null);
 
-	        selection
-	            .on(_pointerPrefix + 'over.hover', null)
-	            .on(_pointerPrefix + 'out.hover', null)
-	            .on(_pointerPrefix + 'down.hover', null);
+	  if (noclick) {
+	    selection.on("click.drag", noevent$1, true);
+	    setTimeout(function () {
+	      selection.on("click.drag", null);
+	    }, 0);
+	  }
 
-	        select(window)
-	            .on(_pointerPrefix + 'up.hover pointercancel.hover', null, true)
-	            .on('keydown.hover', null)
-	            .on('keyup.hover', null);
-	    };
+	  if ("onselectstart" in root) {
+	    selection.on("selectstart.drag", null);
+	  } else {
+	    root.style.MozUserSelect = root.__noselect;
+	    delete root.__noselect;
+	  }
+	}
 
+	var constant$2 = (function (x) {
+	  return function () {
+	    return x;
+	  };
+	});
 
-	    behavior.altDisables = function(val) {
-	        if (!arguments.length) { return _altDisables; }
-	        _altDisables = val;
-	        return behavior;
-	    };
+	function DragEvent(type, _ref) {
+	  var sourceEvent = _ref.sourceEvent,
+	      subject = _ref.subject,
+	      target = _ref.target,
+	      identifier = _ref.identifier,
+	      active = _ref.active,
+	      x = _ref.x,
+	      y = _ref.y,
+	      dx = _ref.dx,
+	      dy = _ref.dy,
+	      dispatch = _ref.dispatch;
+	  Object.defineProperties(this, {
+	    type: {
+	      value: type,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    sourceEvent: {
+	      value: sourceEvent,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    subject: {
+	      value: subject,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    target: {
+	      value: target,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    identifier: {
+	      value: identifier,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    active: {
+	      value: active,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    x: {
+	      value: x,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    y: {
+	      value: y,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    dx: {
+	      value: dx,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    dy: {
+	      value: dy,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    _: {
+	      value: dispatch
+	    }
+	  });
+	}
 
-	    behavior.ignoreVertex = function(val) {
-	        if (!arguments.length) { return _ignoreVertex; }
-	        _ignoreVertex = val;
-	        return behavior;
-	    };
+	DragEvent.prototype.on = function () {
+	  var value = this._.on.apply(this._, arguments);
 
-	    behavior.initialNodeID = function(nodeId) {
-	        _initialNodeID = nodeId;
-	        return behavior;
-	    };
+	  return value === this._ ? this : value;
+	};
 
-	    return utilRebind(behavior, dispatch$1, 'on');
+	function defaultFilter$2(event) {
+	  return !event.ctrlKey && !event.button;
 	}
 
-	var _disableSpace = false;
-	var _lastSpace = null;
+	function defaultContainer() {
+	  return this.parentNode;
+	}
 
+	function defaultSubject(event, d) {
+	  return d == null ? {
+	    x: event.x,
+	    y: event.y
+	  } : d;
+	}
 
-	function behaviorDraw(context) {
-	    var dispatch$1 = dispatch(
-	        'move', 'down', 'downcancel', 'click', 'clickWay', 'clickNode', 'undo', 'cancel', 'finish'
-	    );
+	function defaultTouchable$1() {
+	  return navigator.maxTouchPoints || "ontouchstart" in this;
+	}
 
-	    var keybinding = utilKeybinding('draw');
+	function d3_drag () {
+	  var filter = defaultFilter$2,
+	      container = defaultContainer,
+	      subject = defaultSubject,
+	      touchable = defaultTouchable$1,
+	      gestures = {},
+	      listeners = dispatch$8("start", "drag", "end"),
+	      active = 0,
+	      mousedownx,
+	      mousedowny,
+	      mousemoving,
+	      touchending,
+	      clickDistance2 = 0;
 
-	    var _hover = behaviorHover(context)
-	        .altDisables(true)
-	        .ignoreVertex(true)
-	        .on('hover', context.ui().sidebar.hover);
-	    var _edit = behaviorEdit(context);
+	  function drag(selection) {
+	    selection.on("mousedown.drag", mousedowned).filter(touchable).on("touchstart.drag", touchstarted).on("touchmove.drag", touchmoved).on("touchend.drag touchcancel.drag", touchended).style("touch-action", "none").style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
+	  }
 
-	    var _closeTolerance = 4;
-	    var _tolerance = 12;
-	    var _mouseLeave = false;
-	    var _lastMouse = null;
-	    var _lastPointerUpEvent;
+	  function mousedowned(event, d) {
+	    if (touchending || !filter.call(this, event, d)) return;
+	    var gesture = beforestart(this, container.call(this, event, d), event, d, "mouse");
+	    if (!gesture) return;
+	    select(event.view).on("mousemove.drag", mousemoved, true).on("mouseup.drag", mouseupped, true);
+	    dragDisable(event.view);
+	    nopropagation$1(event);
+	    mousemoving = false;
+	    mousedownx = event.clientX;
+	    mousedowny = event.clientY;
+	    gesture("start", event);
+	  }
 
-	    var _downPointer;
+	  function mousemoved(event) {
+	    noevent$1(event);
 
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	    if (!mousemoving) {
+	      var dx = event.clientX - mousedownx,
+	          dy = event.clientY - mousedowny;
+	      mousemoving = dx * dx + dy * dy > clickDistance2;
+	    }
 
+	    gestures.mouse("drag", event);
+	  }
 
-	    // related code
-	    // - `mode/drag_node.js` `datum()`
-	    function datum() {
-	        var mode = context.mode();
-	        var isNote = mode && (mode.id.indexOf('note') !== -1);
-	        if (event.altKey || isNote) { return {}; }
+	  function mouseupped(event) {
+	    select(event.view).on("mousemove.drag mouseup.drag", null);
+	    yesdrag(event.view, mousemoving);
+	    noevent$1(event);
+	    gestures.mouse("end", event);
+	  }
 
-	        var element;
-	        if (event.type === 'keydown') {
-	            element = _lastMouse && _lastMouse.target;
-	        } else {
-	            element = event.target;
-	        }
+	  function touchstarted(event, d) {
+	    if (!filter.call(this, event, d)) return;
+	    var touches = event.changedTouches,
+	        c = container.call(this, event, d),
+	        n = touches.length,
+	        i,
+	        gesture;
 
-	        // When drawing, snap only to touch targets..
-	        // (this excludes area fills and active drawing elements)
-	        var d = element.__data__;
-	        return (d && d.properties && d.properties.target) ? d : {};
+	    for (i = 0; i < n; ++i) {
+	      if (gesture = beforestart(this, c, event, d, touches[i].identifier, touches[i])) {
+	        nopropagation$1(event);
+	        gesture("start", event, touches[i]);
+	      }
 	    }
+	  }
 
-	    function pointerdown() {
+	  function touchmoved(event) {
+	    var touches = event.changedTouches,
+	        n = touches.length,
+	        i,
+	        gesture;
 
-	        if (_downPointer) { return; }
+	    for (i = 0; i < n; ++i) {
+	      if (gesture = gestures[touches[i].identifier]) {
+	        noevent$1(event);
+	        gesture("drag", event, touches[i]);
+	      }
+	    }
+	  }
 
-	        var pointerLocGetter = utilFastMouse(this);
-	        _downPointer = {
-	            id: event.pointerId || 'mouse',
-	            pointerLocGetter: pointerLocGetter,
-	            downTime: +new Date(),
-	            downLoc: pointerLocGetter(event)
-	        };
+	  function touchended(event) {
+	    var touches = event.changedTouches,
+	        n = touches.length,
+	        i,
+	        gesture;
+	    if (touchending) clearTimeout(touchending);
+	    touchending = setTimeout(function () {
+	      touchending = null;
+	    }, 500); // Ghost clicks are delayed!
 
-	        dispatch$1.call('down', this, datum());
+	    for (i = 0; i < n; ++i) {
+	      if (gesture = gestures[touches[i].identifier]) {
+	        nopropagation$1(event);
+	        gesture("end", event, touches[i]);
+	      }
 	    }
+	  }
 
-	    function pointerup() {
-
-	        if (!_downPointer || _downPointer.id !== (event.pointerId || 'mouse')) { return; }
+	  function beforestart(that, container, event, d, identifier, touch) {
+	    var dispatch = listeners.copy(),
+	        p = pointer(touch || event, container),
+	        dx,
+	        dy,
+	        s;
+	    if ((s = subject.call(that, new DragEvent("beforestart", {
+	      sourceEvent: event,
+	      target: drag,
+	      identifier: identifier,
+	      active: active,
+	      x: p[0],
+	      y: p[1],
+	      dx: 0,
+	      dy: 0,
+	      dispatch: dispatch
+	    }), d)) == null) return;
+	    dx = s.x - p[0] || 0;
+	    dy = s.y - p[1] || 0;
+	    return function gesture(type, event, touch) {
+	      var p0 = p,
+	          n;
 
-	        var downPointer = _downPointer;
-	        _downPointer = null;
+	      switch (type) {
+	        case "start":
+	          gestures[identifier] = gesture, n = active++;
+	          break;
 
-	        _lastPointerUpEvent = event;
+	        case "end":
+	          delete gestures[identifier], --active;
+	        // nobreak
 
-	        if (downPointer.isCancelled) { return; }
+	        case "drag":
+	          p = pointer(touch || event, container), n = active;
+	          break;
+	      }
 
-	        var t2 = +new Date();
-	        var p2 = downPointer.pointerLocGetter(event);
-	        var dist = geoVecLength(downPointer.downLoc, p2);
+	      dispatch.call(type, that, new DragEvent(type, {
+	        sourceEvent: event,
+	        subject: s,
+	        target: drag,
+	        identifier: identifier,
+	        active: n,
+	        x: p[0] + dx,
+	        y: p[1] + dy,
+	        dx: p[0] - p0[0],
+	        dy: p[1] - p0[1],
+	        dispatch: dispatch
+	      }), d);
+	    };
+	  }
 
-	        if (dist < _closeTolerance || (dist < _tolerance && (t2 - downPointer.downTime) < 500)) {
-	            // Prevent a quick second click
-	            select(window).on('click.draw-block', function() {
-	                event.stopPropagation();
-	            }, true);
+	  drag.filter = function (_) {
+	    return arguments.length ? (filter = typeof _ === "function" ? _ : constant$2(!!_), drag) : filter;
+	  };
 
-	            context.map().dblclickZoomEnable(false);
+	  drag.container = function (_) {
+	    return arguments.length ? (container = typeof _ === "function" ? _ : constant$2(_), drag) : container;
+	  };
 
-	            window.setTimeout(function() {
-	                context.map().dblclickZoomEnable(true);
-	                select(window).on('click.draw-block', null);
-	            }, 500);
+	  drag.subject = function (_) {
+	    return arguments.length ? (subject = typeof _ === "function" ? _ : constant$2(_), drag) : subject;
+	  };
 
-	            click(p2);
-	        }
-	    }
+	  drag.touchable = function (_) {
+	    return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$2(!!_), drag) : touchable;
+	  };
 
-	    function pointermove() {
-	        if (_downPointer &&
-	            _downPointer.id === (event.pointerId || 'mouse') &&
-	            !_downPointer.isCancelled) {
-	            var p2 = _downPointer.pointerLocGetter(event);
-	            var dist = geoVecLength(_downPointer.downLoc, p2);
-	            if (dist >= _closeTolerance) {
-	                _downPointer.isCancelled = true;
-	                dispatch$1.call('downcancel', this);
-	            }
-	        }
+	  drag.on = function () {
+	    var value = listeners.on.apply(listeners, arguments);
+	    return value === listeners ? drag : value;
+	  };
 
-	        if ((event.pointerType && event.pointerType !== 'mouse') ||
-	            event.buttons ||
-	            _downPointer) { return; }
+	  drag.clickDistance = function (_) {
+	    return arguments.length ? (clickDistance2 = (_ = +_) * _, drag) : Math.sqrt(clickDistance2);
+	  };
 
-	        // HACK: Mobile Safari likes to send one or more `mouse` type pointermove
-	        // events immediately after non-mouse pointerup events; detect and ignore them.
-	        if (_lastPointerUpEvent &&
-	            _lastPointerUpEvent.pointerType !== 'mouse' &&
-	            event.timeStamp - _lastPointerUpEvent.timeStamp < 100) { return; }
+	  return drag;
+	}
 
-	        _lastMouse = event;
-	        dispatch$1.call('move', this, datum());
+	var DESCRIPTORS$3 = descriptors;
+	var global$3 = global$F;
+	var isForced$1 = isForced_1;
+	var inheritIfRequired$1 = inheritIfRequired$4;
+	var createNonEnumerableProperty = createNonEnumerableProperty$e;
+	var defineProperty$1 = objectDefineProperty.f;
+	var getOwnPropertyNames$1 = objectGetOwnPropertyNames.f;
+	var isRegExp$1 = isRegexp;
+	var getFlags = regexpFlags$1;
+	var stickyHelpers = regexpStickyHelpers;
+	var redefine$2 = redefine$g.exports;
+	var fails$a = fails$N;
+	var has$1 = has$j;
+	var enforceInternalState = internalState.enforce;
+	var setSpecies = setSpecies$5;
+	var wellKnownSymbol$1 = wellKnownSymbol$s;
+	var UNSUPPORTED_DOT_ALL = regexpUnsupportedDotAll;
+	var UNSUPPORTED_NCG = regexpUnsupportedNcg;
+
+	var MATCH$1 = wellKnownSymbol$1('match');
+	var NativeRegExp = global$3.RegExp;
+	var RegExpPrototype = NativeRegExp.prototype;
+	// TODO: Use only propper RegExpIdentifierName
+	var IS_NCG = /^\?<[^\s\d!#%&*+<=>@^][^\s!#%&*+<=>@^]*>/;
+	var re1 = /a/g;
+	var re2 = /a/g;
+
+	// "new" should create a new object, old webkit bug
+	var CORRECT_NEW = new NativeRegExp(re1) !== re1;
+
+	var UNSUPPORTED_Y = stickyHelpers.UNSUPPORTED_Y;
+
+	var BASE_FORCED = DESCRIPTORS$3 &&
+	  (!CORRECT_NEW || UNSUPPORTED_Y || UNSUPPORTED_DOT_ALL || UNSUPPORTED_NCG || fails$a(function () {
+	    re2[MATCH$1] = false;
+	    // RegExp constructor can alter flags and IsRegExp works correct with @@match
+	    return NativeRegExp(re1) != re1 || NativeRegExp(re2) == re2 || NativeRegExp(re1, 'i') != '/a/i';
+	  }));
+
+	var handleDotAll = function (string) {
+	  var length = string.length;
+	  var index = 0;
+	  var result = '';
+	  var brackets = false;
+	  var chr;
+	  for (; index <= length; index++) {
+	    chr = string.charAt(index);
+	    if (chr === '\\') {
+	      result += chr + string.charAt(++index);
+	      continue;
+	    }
+	    if (!brackets && chr === '.') {
+	      result += '[\\s\\S]';
+	    } else {
+	      if (chr === '[') {
+	        brackets = true;
+	      } else if (chr === ']') {
+	        brackets = false;
+	      } result += chr;
 	    }
+	  } return result;
+	};
 
-	    function pointercancel() {
-	        if (_downPointer &&
-	            _downPointer.id === (event.pointerId || 'mouse')) {
-
-	            if (!_downPointer.isCancelled) {
-	                dispatch$1.call('downcancel', this);
-	            }
-	            _downPointer = null;
+	var handleNCG = function (string) {
+	  var length = string.length;
+	  var index = 0;
+	  var result = '';
+	  var named = [];
+	  var names = {};
+	  var brackets = false;
+	  var ncg = false;
+	  var groupid = 0;
+	  var groupname = '';
+	  var chr;
+	  for (; index <= length; index++) {
+	    chr = string.charAt(index);
+	    if (chr === '\\') {
+	      chr = chr + string.charAt(++index);
+	    } else if (chr === ']') {
+	      brackets = false;
+	    } else if (!brackets) switch (true) {
+	      case chr === '[':
+	        brackets = true;
+	        break;
+	      case chr === '(':
+	        if (IS_NCG.test(string.slice(index + 1))) {
+	          index += 2;
+	          ncg = true;
 	        }
+	        result += chr;
+	        groupid++;
+	        continue;
+	      case chr === '>' && ncg:
+	        if (groupname === '' || has$1(names, groupname)) {
+	          throw new SyntaxError('Invalid capture group name');
+	        }
+	        names[groupname] = true;
+	        named.push([groupname, groupid]);
+	        ncg = false;
+	        groupname = '';
+	        continue;
 	    }
+	    if (ncg) groupname += chr;
+	    else result += chr;
+	  } return [result, named];
+	};
 
-	    function mouseenter() {
-	        _mouseLeave = false;
-	    }
-
-	    function mouseleave() {
-	        _mouseLeave = true;
-	    }
+	// `RegExp` constructor
+	// https://tc39.es/ecma262/#sec-regexp-constructor
+	if (isForced$1('RegExp', BASE_FORCED)) {
+	  var RegExpWrapper = function RegExp(pattern, flags) {
+	    var thisIsRegExp = this instanceof RegExpWrapper;
+	    var patternIsRegExp = isRegExp$1(pattern);
+	    var flagsAreUndefined = flags === undefined;
+	    var groups = [];
+	    var rawPattern, rawFlags, dotAll, sticky, handled, result, state;
 
-	    function allowsVertex(d) {
-	        return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
+	    if (!thisIsRegExp && patternIsRegExp && pattern.constructor === RegExpWrapper && flagsAreUndefined) {
+	      return pattern;
 	    }
 
-	    // related code
-	    // - `mode/drag_node.js`     `doMove()`
-	    // - `behavior/draw.js`      `click()`
-	    // - `behavior/draw_way.js`  `move()`
-	    function click(loc) {
-	        var d = datum();
-	        var target = d && d.properties && d.properties.entity;
-
-	        var mode = context.mode();
-
-	        if (target && target.type === 'node' && allowsVertex(target)) {   // Snap to a node
-	            dispatch$1.call('clickNode', this, target, d);
-	            return;
-
-	        } else if (target && target.type === 'way' && (mode.id !== 'add-point' || mode.preset.matchGeometry('vertex'))) {   // Snap to a way
-	            var choice = geoChooseEdge(
-	                context.graph().childNodes(target), loc, context.projection, context.activeID()
-	            );
-	            if (choice) {
-	                var edge = [target.nodes[choice.index - 1], target.nodes[choice.index]];
-	                dispatch$1.call('clickWay', this, choice.loc, edge, d);
-	                return;
-	            }
-	        } else if (mode.id !== 'add-point' || mode.preset.matchGeometry('point')) {
-	            var locLatLng = context.projection.invert(loc);
-	            dispatch$1.call('click', this, locLatLng, d);
-	        }
-
+	    if (CORRECT_NEW) {
+	      if (patternIsRegExp && !flagsAreUndefined) pattern = pattern.source;
+	    } else if (pattern instanceof RegExpWrapper) {
+	      if (flagsAreUndefined) flags = getFlags.call(pattern);
+	      pattern = pattern.source;
 	    }
 
-	    // treat a spacebar press like a click
-	    function space() {
-	        event.preventDefault();
-	        event.stopPropagation();
-
-	        var currSpace = context.map().mouse();
-	        if (_disableSpace && _lastSpace) {
-	            var dist = geoVecLength(_lastSpace, currSpace);
-	            if (dist > _tolerance) {
-	                _disableSpace = false;
-	            }
-	        }
-
-	        if (_disableSpace || _mouseLeave || !_lastMouse) { return; }
-
-	        // user must move mouse or release space bar to allow another click
-	        _lastSpace = currSpace;
-	        _disableSpace = true;
+	    pattern = pattern === undefined ? '' : String(pattern);
+	    flags = flags === undefined ? '' : String(flags);
+	    rawPattern = pattern;
 
-	        select(window).on('keyup.space-block', function() {
-	            event.preventDefault();
-	            event.stopPropagation();
-	            _disableSpace = false;
-	            select(window).on('keyup.space-block', null);
-	        });
-
-	        // get the current mouse position
-	        var loc = context.map().mouse() ||
-	            // or the map center if the mouse has never entered the map
-	            context.projection(context.map().center());
-	        click(loc);
+	    if (UNSUPPORTED_DOT_ALL && 'dotAll' in re1) {
+	      dotAll = !!flags && flags.indexOf('s') > -1;
+	      if (dotAll) flags = flags.replace(/s/g, '');
 	    }
 
+	    rawFlags = flags;
 
-	    function backspace() {
-	        event.preventDefault();
-	        dispatch$1.call('undo');
+	    if (UNSUPPORTED_Y && 'sticky' in re1) {
+	      sticky = !!flags && flags.indexOf('y') > -1;
+	      if (sticky) flags = flags.replace(/y/g, '');
 	    }
 
-
-	    function del() {
-	        event.preventDefault();
-	        dispatch$1.call('cancel');
+	    if (UNSUPPORTED_NCG) {
+	      handled = handleNCG(pattern);
+	      pattern = handled[0];
+	      groups = handled[1];
 	    }
 
+	    result = inheritIfRequired$1(
+	      CORRECT_NEW ? new NativeRegExp(pattern, flags) : NativeRegExp(pattern, flags),
+	      thisIsRegExp ? this : RegExpPrototype,
+	      RegExpWrapper
+	    );
 
-	    function ret() {
-	        event.preventDefault();
-	        dispatch$1.call('finish');
+	    if (dotAll || sticky || groups.length) {
+	      state = enforceInternalState(result);
+	      if (dotAll) {
+	        state.dotAll = true;
+	        state.raw = RegExpWrapper(handleDotAll(pattern), rawFlags);
+	      }
+	      if (sticky) state.sticky = true;
+	      if (groups.length) state.groups = groups;
 	    }
 
+	    if (pattern !== rawPattern) try {
+	      // fails in old engines, but we have no alternatives for unsupported regex syntax
+	      createNonEnumerableProperty(result, 'source', rawPattern === '' ? '(?:)' : rawPattern);
+	    } catch (error) { /* empty */ }
 
-	    function behavior(selection) {
-	        context.install(_hover);
-	        context.install(_edit);
-
-	        _downPointer = null;
-
-	        keybinding
-	            .on('⌫', backspace)
-	            .on('⌦', del)
-	            .on('⎋', ret)
-	            .on('↩', ret)
-	            .on('space', space)
-	            .on('⌥space', space);
-
-	        selection
-	            .on('mouseenter.draw', mouseenter)
-	            .on('mouseleave.draw', mouseleave)
-	            .on(_pointerPrefix + 'down.draw', pointerdown)
-	            .on(_pointerPrefix + 'move.draw', pointermove);
+	    return result;
+	  };
 
-	        select(window)
-	            .on(_pointerPrefix + 'up.draw', pointerup, true)
-	            .on('pointercancel.draw', pointercancel, true);
+	  var proxy = function (key) {
+	    key in RegExpWrapper || defineProperty$1(RegExpWrapper, key, {
+	      configurable: true,
+	      get: function () { return NativeRegExp[key]; },
+	      set: function (it) { NativeRegExp[key] = it; }
+	    });
+	  };
 
-	        select(document)
-	            .call(keybinding);
+	  for (var keys$1 = getOwnPropertyNames$1(NativeRegExp), index$1 = 0; keys$1.length > index$1;) {
+	    proxy(keys$1[index$1++]);
+	  }
 
-	        return behavior;
-	    }
+	  RegExpPrototype.constructor = RegExpWrapper;
+	  RegExpWrapper.prototype = RegExpPrototype;
+	  redefine$2(global$3, 'RegExp', RegExpWrapper);
+	}
 
+	// https://tc39.es/ecma262/#sec-get-regexp-@@species
+	setSpecies('RegExp');
 
-	    behavior.off = function(selection) {
-	        context.ui().sidebar.hover.cancel();
-	        context.uninstall(_hover);
-	        context.uninstall(_edit);
+	function define (constructor, factory, prototype) {
+	  constructor.prototype = factory.prototype = prototype;
+	  prototype.constructor = constructor;
+	}
+	function extend$3(parent, definition) {
+	  var prototype = Object.create(parent.prototype);
 
-	        selection
-	            .on('mouseenter.draw', null)
-	            .on('mouseleave.draw', null)
-	            .on(_pointerPrefix + 'down.draw', null)
-	            .on(_pointerPrefix + 'move.draw', null);
+	  for (var key in definition) {
+	    prototype[key] = definition[key];
+	  }
 
-	        select(window)
-	            .on(_pointerPrefix + 'up.draw', null)
-	            .on('pointercancel.draw', null);
-	            // note: keyup.space-block, click.draw-block should remain
+	  return prototype;
+	}
 
-	        select(document)
-	            .call(keybinding.unbind);
-	    };
+	function Color() {}
+	var _darker = 0.7;
 
+	var _brighter = 1 / _darker;
+	var reI = "\\s*([+-]?\\d+)\\s*",
+	    reN = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)\\s*",
+	    reP = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)%\\s*",
+	    reHex = /^#([0-9a-f]{3,8})$/,
+	    reRgbInteger = new RegExp("^rgb\\(" + [reI, reI, reI] + "\\)$"),
+	    reRgbPercent = new RegExp("^rgb\\(" + [reP, reP, reP] + "\\)$"),
+	    reRgbaInteger = new RegExp("^rgba\\(" + [reI, reI, reI, reN] + "\\)$"),
+	    reRgbaPercent = new RegExp("^rgba\\(" + [reP, reP, reP, reN] + "\\)$"),
+	    reHslPercent = new RegExp("^hsl\\(" + [reN, reP, reP] + "\\)$"),
+	    reHslaPercent = new RegExp("^hsla\\(" + [reN, reP, reP, reN] + "\\)$");
+	var named = {
+	  aliceblue: 0xf0f8ff,
+	  antiquewhite: 0xfaebd7,
+	  aqua: 0x00ffff,
+	  aquamarine: 0x7fffd4,
+	  azure: 0xf0ffff,
+	  beige: 0xf5f5dc,
+	  bisque: 0xffe4c4,
+	  black: 0x000000,
+	  blanchedalmond: 0xffebcd,
+	  blue: 0x0000ff,
+	  blueviolet: 0x8a2be2,
+	  brown: 0xa52a2a,
+	  burlywood: 0xdeb887,
+	  cadetblue: 0x5f9ea0,
+	  chartreuse: 0x7fff00,
+	  chocolate: 0xd2691e,
+	  coral: 0xff7f50,
+	  cornflowerblue: 0x6495ed,
+	  cornsilk: 0xfff8dc,
+	  crimson: 0xdc143c,
+	  cyan: 0x00ffff,
+	  darkblue: 0x00008b,
+	  darkcyan: 0x008b8b,
+	  darkgoldenrod: 0xb8860b,
+	  darkgray: 0xa9a9a9,
+	  darkgreen: 0x006400,
+	  darkgrey: 0xa9a9a9,
+	  darkkhaki: 0xbdb76b,
+	  darkmagenta: 0x8b008b,
+	  darkolivegreen: 0x556b2f,
+	  darkorange: 0xff8c00,
+	  darkorchid: 0x9932cc,
+	  darkred: 0x8b0000,
+	  darksalmon: 0xe9967a,
+	  darkseagreen: 0x8fbc8f,
+	  darkslateblue: 0x483d8b,
+	  darkslategray: 0x2f4f4f,
+	  darkslategrey: 0x2f4f4f,
+	  darkturquoise: 0x00ced1,
+	  darkviolet: 0x9400d3,
+	  deeppink: 0xff1493,
+	  deepskyblue: 0x00bfff,
+	  dimgray: 0x696969,
+	  dimgrey: 0x696969,
+	  dodgerblue: 0x1e90ff,
+	  firebrick: 0xb22222,
+	  floralwhite: 0xfffaf0,
+	  forestgreen: 0x228b22,
+	  fuchsia: 0xff00ff,
+	  gainsboro: 0xdcdcdc,
+	  ghostwhite: 0xf8f8ff,
+	  gold: 0xffd700,
+	  goldenrod: 0xdaa520,
+	  gray: 0x808080,
+	  green: 0x008000,
+	  greenyellow: 0xadff2f,
+	  grey: 0x808080,
+	  honeydew: 0xf0fff0,
+	  hotpink: 0xff69b4,
+	  indianred: 0xcd5c5c,
+	  indigo: 0x4b0082,
+	  ivory: 0xfffff0,
+	  khaki: 0xf0e68c,
+	  lavender: 0xe6e6fa,
+	  lavenderblush: 0xfff0f5,
+	  lawngreen: 0x7cfc00,
+	  lemonchiffon: 0xfffacd,
+	  lightblue: 0xadd8e6,
+	  lightcoral: 0xf08080,
+	  lightcyan: 0xe0ffff,
+	  lightgoldenrodyellow: 0xfafad2,
+	  lightgray: 0xd3d3d3,
+	  lightgreen: 0x90ee90,
+	  lightgrey: 0xd3d3d3,
+	  lightpink: 0xffb6c1,
+	  lightsalmon: 0xffa07a,
+	  lightseagreen: 0x20b2aa,
+	  lightskyblue: 0x87cefa,
+	  lightslategray: 0x778899,
+	  lightslategrey: 0x778899,
+	  lightsteelblue: 0xb0c4de,
+	  lightyellow: 0xffffe0,
+	  lime: 0x00ff00,
+	  limegreen: 0x32cd32,
+	  linen: 0xfaf0e6,
+	  magenta: 0xff00ff,
+	  maroon: 0x800000,
+	  mediumaquamarine: 0x66cdaa,
+	  mediumblue: 0x0000cd,
+	  mediumorchid: 0xba55d3,
+	  mediumpurple: 0x9370db,
+	  mediumseagreen: 0x3cb371,
+	  mediumslateblue: 0x7b68ee,
+	  mediumspringgreen: 0x00fa9a,
+	  mediumturquoise: 0x48d1cc,
+	  mediumvioletred: 0xc71585,
+	  midnightblue: 0x191970,
+	  mintcream: 0xf5fffa,
+	  mistyrose: 0xffe4e1,
+	  moccasin: 0xffe4b5,
+	  navajowhite: 0xffdead,
+	  navy: 0x000080,
+	  oldlace: 0xfdf5e6,
+	  olive: 0x808000,
+	  olivedrab: 0x6b8e23,
+	  orange: 0xffa500,
+	  orangered: 0xff4500,
+	  orchid: 0xda70d6,
+	  palegoldenrod: 0xeee8aa,
+	  palegreen: 0x98fb98,
+	  paleturquoise: 0xafeeee,
+	  palevioletred: 0xdb7093,
+	  papayawhip: 0xffefd5,
+	  peachpuff: 0xffdab9,
+	  peru: 0xcd853f,
+	  pink: 0xffc0cb,
+	  plum: 0xdda0dd,
+	  powderblue: 0xb0e0e6,
+	  purple: 0x800080,
+	  rebeccapurple: 0x663399,
+	  red: 0xff0000,
+	  rosybrown: 0xbc8f8f,
+	  royalblue: 0x4169e1,
+	  saddlebrown: 0x8b4513,
+	  salmon: 0xfa8072,
+	  sandybrown: 0xf4a460,
+	  seagreen: 0x2e8b57,
+	  seashell: 0xfff5ee,
+	  sienna: 0xa0522d,
+	  silver: 0xc0c0c0,
+	  skyblue: 0x87ceeb,
+	  slateblue: 0x6a5acd,
+	  slategray: 0x708090,
+	  slategrey: 0x708090,
+	  snow: 0xfffafa,
+	  springgreen: 0x00ff7f,
+	  steelblue: 0x4682b4,
+	  tan: 0xd2b48c,
+	  teal: 0x008080,
+	  thistle: 0xd8bfd8,
+	  tomato: 0xff6347,
+	  turquoise: 0x40e0d0,
+	  violet: 0xee82ee,
+	  wheat: 0xf5deb3,
+	  white: 0xffffff,
+	  whitesmoke: 0xf5f5f5,
+	  yellow: 0xffff00,
+	  yellowgreen: 0x9acd32
+	};
+	define(Color, color, {
+	  copy: function copy(channels) {
+	    return Object.assign(new this.constructor(), this, channels);
+	  },
+	  displayable: function displayable() {
+	    return this.rgb().displayable();
+	  },
+	  hex: color_formatHex,
+	  // Deprecated! Use color.formatHex.
+	  formatHex: color_formatHex,
+	  formatHsl: color_formatHsl,
+	  formatRgb: color_formatRgb,
+	  toString: color_formatRgb
+	});
 
-	    behavior.hover = function() {
-	        return _hover;
-	    };
+	function color_formatHex() {
+	  return this.rgb().formatHex();
+	}
 
+	function color_formatHsl() {
+	  return hslConvert(this).formatHsl();
+	}
 
-	    return utilRebind(behavior, dispatch$1, 'on');
+	function color_formatRgb() {
+	  return this.rgb().formatRgb();
 	}
 
-	function initRange(domain, range) {
-	  switch (arguments.length) {
-	    case 0: break;
-	    case 1: this.range(domain); break;
-	    default: this.range(range).domain(domain); break;
-	  }
-	  return this;
+	function color(format) {
+	  var m, l;
+	  format = (format + "").trim().toLowerCase();
+	  return (m = reHex.exec(format)) ? (l = m[1].length, m = parseInt(m[1], 16), l === 6 ? rgbn(m) // #ff0000
+	  : l === 3 ? new Rgb(m >> 8 & 0xf | m >> 4 & 0xf0, m >> 4 & 0xf | m & 0xf0, (m & 0xf) << 4 | m & 0xf, 1) // #f00
+	  : l === 8 ? rgba(m >> 24 & 0xff, m >> 16 & 0xff, m >> 8 & 0xff, (m & 0xff) / 0xff) // #ff000000
+	  : l === 4 ? rgba(m >> 12 & 0xf | m >> 8 & 0xf0, m >> 8 & 0xf | m >> 4 & 0xf0, m >> 4 & 0xf | m & 0xf0, ((m & 0xf) << 4 | m & 0xf) / 0xff) // #f000
+	  : null // invalid hex
+	  ) : (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)
+	  : (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)
+	  : (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)
+	  : (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)
+	  : (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)
+	  : (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)
+	  : named.hasOwnProperty(format) ? rgbn(named[format]) // eslint-disable-line no-prototype-builtins
+	  : format === "transparent" ? new Rgb(NaN, NaN, NaN, 0) : null;
 	}
 
-	var prefix = "$";
+	function rgbn(n) {
+	  return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);
+	}
 
-	function Map$1() {}
+	function rgba(r, g, b, a) {
+	  if (a <= 0) r = g = b = NaN;
+	  return new Rgb(r, g, b, a);
+	}
 
-	Map$1.prototype = map$2.prototype = {
-	  constructor: Map$1,
-	  has: function(key) {
-	    return (prefix + key) in this;
+	function rgbConvert(o) {
+	  if (!(o instanceof Color)) o = color(o);
+	  if (!o) return new Rgb();
+	  o = o.rgb();
+	  return new Rgb(o.r, o.g, o.b, o.opacity);
+	}
+	function rgb(r, g, b, opacity) {
+	  return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity);
+	}
+	function Rgb(r, g, b, opacity) {
+	  this.r = +r;
+	  this.g = +g;
+	  this.b = +b;
+	  this.opacity = +opacity;
+	}
+	define(Rgb, rgb, extend$3(Color, {
+	  brighter: function brighter(k) {
+	    k = k == null ? _brighter : Math.pow(_brighter, k);
+	    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
 	  },
-	  get: function(key) {
-	    return this[prefix + key];
+	  darker: function darker(k) {
+	    k = k == null ? _darker : Math.pow(_darker, k);
+	    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
 	  },
-	  set: function(key, value) {
-	    this[prefix + key] = value;
+	  rgb: function rgb() {
 	    return this;
 	  },
-	  remove: function(key) {
-	    var property = prefix + key;
-	    return property in this && delete this[property];
-	  },
-	  clear: function() {
-	    for (var property in this) { if (property[0] === prefix) { delete this[property]; } }
-	  },
-	  keys: function() {
-	    var keys = [];
-	    for (var property in this) { if (property[0] === prefix) { keys.push(property.slice(1)); } }
-	    return keys;
-	  },
-	  values: function() {
-	    var values = [];
-	    for (var property in this) { if (property[0] === prefix) { values.push(this[property]); } }
-	    return values;
-	  },
-	  entries: function() {
-	    var entries = [];
-	    for (var property in this) { if (property[0] === prefix) { entries.push({key: property.slice(1), value: this[property]}); } }
-	    return entries;
-	  },
-	  size: function() {
-	    var size = 0;
-	    for (var property in this) { if (property[0] === prefix) { ++size; } }
-	    return size;
+	  displayable: function displayable() {
+	    return -0.5 <= this.r && this.r < 255.5 && -0.5 <= this.g && this.g < 255.5 && -0.5 <= this.b && this.b < 255.5 && 0 <= this.opacity && this.opacity <= 1;
 	  },
-	  empty: function() {
-	    for (var property in this) { if (property[0] === prefix) { return false; } }
-	    return true;
-	  },
-	  each: function(f) {
-	    for (var property in this) { if (property[0] === prefix) { f(this[property], property.slice(1), this); } }
-	  }
-	};
-
-	function map$2(object, f) {
-	  var map = new Map$1;
-
-	  // Copy constructor.
-	  if (object instanceof Map$1) { object.each(function(value, key) { map.set(key, value); }); }
-
-	  // Index array by numeric index or specified key function.
-	  else if (Array.isArray(object)) {
-	    var i = -1,
-	        n = object.length,
-	        o;
-
-	    if (f == null) { while (++i < n) { map.set(i, object[i]); } }
-	    else { while (++i < n) { map.set(f(o = object[i], i, object), o); } }
-	  }
-
-	  // Convert object to map.
-	  else if (object) { for (var key in object) { map.set(key, object[key]); } }
+	  hex: rgb_formatHex,
+	  // Deprecated! Use color.formatHex.
+	  formatHex: rgb_formatHex,
+	  formatRgb: rgb_formatRgb,
+	  toString: rgb_formatRgb
+	}));
 
-	  return map;
+	function rgb_formatHex() {
+	  return "#" + hex$1(this.r) + hex$1(this.g) + hex$1(this.b);
 	}
 
-	function Set$1() {}
-
-	var proto = map$2.prototype;
+	function rgb_formatRgb() {
+	  var a = this.opacity;
+	  a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
+	  return (a === 1 ? "rgb(" : "rgba(") + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", " + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", " + Math.max(0, Math.min(255, Math.round(this.b) || 0)) + (a === 1 ? ")" : ", " + a + ")");
+	}
 
-	Set$1.prototype = set$2.prototype = {
-	  constructor: Set$1,
-	  has: proto.has,
-	  add: function(value) {
-	    value += "";
-	    this[prefix + value] = value;
-	    return this;
-	  },
-	  remove: proto.remove,
-	  clear: proto.clear,
-	  values: proto.keys,
-	  size: proto.size,
-	  empty: proto.empty,
-	  each: proto.each
-	};
+	function hex$1(value) {
+	  value = Math.max(0, Math.min(255, Math.round(value) || 0));
+	  return (value < 16 ? "0" : "") + value.toString(16);
+	}
 
-	function set$2(object, f) {
-	  var set = new Set$1;
+	function hsla(h, s, l, a) {
+	  if (a <= 0) h = s = l = NaN;else if (l <= 0 || l >= 1) h = s = NaN;else if (s <= 0) h = NaN;
+	  return new Hsl(h, s, l, a);
+	}
 
-	  // Copy constructor.
-	  if (object instanceof Set$1) { object.each(function(value) { set.add(value); }); }
+	function hslConvert(o) {
+	  if (o instanceof Hsl) return new Hsl(o.h, o.s, o.l, o.opacity);
+	  if (!(o instanceof Color)) o = color(o);
+	  if (!o) return new Hsl();
+	  if (o instanceof Hsl) return o;
+	  o = o.rgb();
+	  var r = o.r / 255,
+	      g = o.g / 255,
+	      b = o.b / 255,
+	      min = Math.min(r, g, b),
+	      max = Math.max(r, g, b),
+	      h = NaN,
+	      s = max - min,
+	      l = (max + min) / 2;
 
-	  // Otherwise, assume it’s an array.
-	  else if (object) {
-	    var i = -1, n = object.length;
-	    if (f == null) { while (++i < n) { set.add(object[i]); } }
-	    else { while (++i < n) { set.add(f(object[i], i, object)); } }
+	  if (s) {
+	    if (r === max) h = (g - b) / s + (g < b) * 6;else if (g === max) h = (b - r) / s + 2;else h = (r - g) / s + 4;
+	    s /= l < 0.5 ? max + min : 2 - max - min;
+	    h *= 60;
+	  } else {
+	    s = l > 0 && l < 1 ? 0 : h;
 	  }
 
-	  return set;
+	  return new Hsl(h, s, l, o.opacity);
 	}
-
-	var array$1 = Array.prototype;
-
-	var map$3 = array$1.map;
-	var slice$4 = array$1.slice;
-
-	function constant$4(x) {
-	  return function() {
-	    return x;
-	  };
+	function hsl(h, s, l, opacity) {
+	  return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity);
 	}
 
-	function number$1(x) {
-	  return +x;
+	function Hsl(h, s, l, opacity) {
+	  this.h = +h;
+	  this.s = +s;
+	  this.l = +l;
+	  this.opacity = +opacity;
 	}
 
-	var unit = [0, 1];
+	define(Hsl, hsl, extend$3(Color, {
+	  brighter: function brighter(k) {
+	    k = k == null ? _brighter : Math.pow(_brighter, k);
+	    return new Hsl(this.h, this.s, this.l * k, this.opacity);
+	  },
+	  darker: function darker(k) {
+	    k = k == null ? _darker : Math.pow(_darker, k);
+	    return new Hsl(this.h, this.s, this.l * k, this.opacity);
+	  },
+	  rgb: function rgb() {
+	    var h = this.h % 360 + (this.h < 0) * 360,
+	        s = isNaN(h) || isNaN(this.s) ? 0 : this.s,
+	        l = this.l,
+	        m2 = l + (l < 0.5 ? l : 1 - l) * s,
+	        m1 = 2 * l - m2;
+	    return new Rgb(hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2), hsl2rgb(h, m1, m2), hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2), this.opacity);
+	  },
+	  displayable: function displayable() {
+	    return (0 <= this.s && this.s <= 1 || isNaN(this.s)) && 0 <= this.l && this.l <= 1 && 0 <= this.opacity && this.opacity <= 1;
+	  },
+	  formatHsl: function formatHsl() {
+	    var a = this.opacity;
+	    a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
+	    return (a === 1 ? "hsl(" : "hsla(") + (this.h || 0) + ", " + (this.s || 0) * 100 + "%, " + (this.l || 0) * 100 + "%" + (a === 1 ? ")" : ", " + a + ")");
+	  }
+	}));
+	/* From FvD 13.37, CSS Color Module Level 3 */
 
-	function identity$3(x) {
-	  return x;
+	function hsl2rgb(h, m1, m2) {
+	  return (h < 60 ? m1 + (m2 - m1) * h / 60 : h < 180 ? m2 : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60 : m1) * 255;
 	}
 
-	function normalize(a, b) {
-	  return (b -= (a = +a))
-	      ? function(x) { return (x - a) / b; }
-	      : constant$4(isNaN(b) ? NaN : 0.5);
-	}
+	var constant$1 = (function (x) {
+	  return function () {
+	    return x;
+	  };
+	});
 
-	function clamper(domain) {
-	  var a = domain[0], b = domain[domain.length - 1], t;
-	  if (a > b) { t = a, a = b, b = t; }
-	  return function(x) { return Math.max(a, Math.min(b, x)); };
+	function linear$2(a, d) {
+	  return function (t) {
+	    return a + t * d;
+	  };
 	}
 
-	// normalize(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].
-	// interpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding range value x in [a,b].
-	function bimap(domain, range, interpolate) {
-	  var d0 = domain[0], d1 = domain[1], r0 = range[0], r1 = range[1];
-	  if (d1 < d0) { d0 = normalize(d1, d0), r0 = interpolate(r1, r0); }
-	  else { d0 = normalize(d0, d1), r0 = interpolate(r0, r1); }
-	  return function(x) { return r0(d0(x)); };
+	function exponential(a, b, y) {
+	  return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function (t) {
+	    return Math.pow(a + t * b, y);
+	  };
 	}
-
-	function polymap(domain, range, interpolate) {
-	  var j = Math.min(domain.length, range.length) - 1,
-	      d = new Array(j),
-	      r = new Array(j),
-	      i = -1;
-
-	  // Reverse descending domains.
-	  if (domain[j] < domain[0]) {
-	    domain = domain.slice().reverse();
-	    range = range.slice().reverse();
-	  }
-
-	  while (++i < j) {
-	    d[i] = normalize(domain[i], domain[i + 1]);
-	    r[i] = interpolate(range[i], range[i + 1]);
-	  }
-
-	  return function(x) {
-	    var i = bisectRight(domain, x, 1, j) - 1;
-	    return r[i](d[i](x));
+	function gamma(y) {
+	  return (y = +y) === 1 ? nogamma : function (a, b) {
+	    return b - a ? exponential(a, b, y) : constant$1(isNaN(a) ? b : a);
 	  };
 	}
-
-	function copy$1(source, target) {
-	  return target
-	      .domain(source.domain())
-	      .range(source.range())
-	      .interpolate(source.interpolate())
-	      .clamp(source.clamp())
-	      .unknown(source.unknown());
+	function nogamma(a, b) {
+	  var d = b - a;
+	  return d ? linear$2(a, d) : constant$1(isNaN(a) ? b : a);
 	}
 
-	function transformer$1() {
-	  var domain = unit,
-	      range = unit,
-	      interpolate$1 = interpolate,
-	      transform,
-	      untransform,
-	      unknown,
-	      clamp = identity$3,
-	      piecewise,
-	      output,
-	      input;
+	var d3_interpolateRgb = (function rgbGamma(y) {
+	  var color = gamma(y);
 
-	  function rescale() {
-	    piecewise = Math.min(domain.length, range.length) > 2 ? polymap : bimap;
-	    output = input = null;
-	    return scale;
+	  function rgb$1(start, end) {
+	    var r = color((start = rgb(start)).r, (end = rgb(end)).r),
+	        g = color(start.g, end.g),
+	        b = color(start.b, end.b),
+	        opacity = nogamma(start.opacity, end.opacity);
+	    return function (t) {
+	      start.r = r(t);
+	      start.g = g(t);
+	      start.b = b(t);
+	      start.opacity = opacity(t);
+	      return start + "";
+	    };
 	  }
 
-	  function scale(x) {
-	    return isNaN(x = +x) ? unknown : (output || (output = piecewise(domain.map(transform), range, interpolate$1)))(transform(clamp(x)));
-	  }
+	  rgb$1.gamma = rgbGamma;
+	  return rgb$1;
+	})(1);
+
+	function numberArray (a, b) {
+	  if (!b) b = [];
+	  var n = a ? Math.min(b.length, a.length) : 0,
+	      c = b.slice(),
+	      i;
+	  return function (t) {
+	    for (i = 0; i < n; ++i) {
+	      c[i] = a[i] * (1 - t) + b[i] * t;
+	    }
 
-	  scale.invert = function(y) {
-	    return clamp(untransform((input || (input = piecewise(range, domain.map(transform), d3_interpolateNumber)))(y)));
+	    return c;
 	  };
+	}
+	function isNumberArray(x) {
+	  return ArrayBuffer.isView(x) && !(x instanceof DataView);
+	}
 
-	  scale.domain = function(_) {
-	    return arguments.length ? (domain = map$3.call(_, number$1), clamp === identity$3 || (clamp = clamper(domain)), rescale()) : domain.slice();
-	  };
+	function genericArray(a, b) {
+	  var nb = b ? b.length : 0,
+	      na = a ? Math.min(nb, a.length) : 0,
+	      x = new Array(na),
+	      c = new Array(nb),
+	      i;
 
-	  scale.range = function(_) {
-	    return arguments.length ? (range = slice$4.call(_), rescale()) : range.slice();
-	  };
+	  for (i = 0; i < na; ++i) {
+	    x[i] = interpolate$1(a[i], b[i]);
+	  }
 
-	  scale.rangeRound = function(_) {
-	    return range = slice$4.call(_), interpolate$1 = interpolateRound, rescale();
-	  };
+	  for (; i < nb; ++i) {
+	    c[i] = b[i];
+	  }
 
-	  scale.clamp = function(_) {
-	    return arguments.length ? (clamp = _ ? clamper(domain) : identity$3, scale) : clamp !== identity$3;
-	  };
+	  return function (t) {
+	    for (i = 0; i < na; ++i) {
+	      c[i] = x[i](t);
+	    }
 
-	  scale.interpolate = function(_) {
-	    return arguments.length ? (interpolate$1 = _, rescale()) : interpolate$1;
+	    return c;
 	  };
+	}
 
-	  scale.unknown = function(_) {
-	    return arguments.length ? (unknown = _, scale) : unknown;
+	function date (a, b) {
+	  var d = new Date();
+	  return a = +a, b = +b, function (t) {
+	    return d.setTime(a * (1 - t) + b * t), d;
 	  };
+	}
 
-	  return function(t, u) {
-	    transform = t, untransform = u;
-	    return rescale();
+	function d3_interpolateNumber (a, b) {
+	  return a = +a, b = +b, function (t) {
+	    return a * (1 - t) + b * t;
 	  };
 	}
 
-	function continuous(transform, untransform) {
-	  return transformer$1()(transform, untransform);
-	}
+	function object (a, b) {
+	  var i = {},
+	      c = {},
+	      k;
+	  if (a === null || _typeof(a) !== "object") a = {};
+	  if (b === null || _typeof(b) !== "object") b = {};
 
-	// Computes the decimal coefficient and exponent of the specified number x with
-	// significant digits p, where x is positive and p is in [1, 21] or undefined.
-	// For example, formatDecimal(1.23) returns ["123", 0].
-	function formatDecimal(x, p) {
-	  if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) { return null; } // NaN, ±Infinity
-	  var i, coefficient = x.slice(0, i);
+	  for (k in b) {
+	    if (k in a) {
+	      i[k] = interpolate$1(a[k], b[k]);
+	    } else {
+	      c[k] = b[k];
+	    }
+	  }
 
-	  // The string returned by toExponential either has the form \d\.\d+e[-+]\d+
-	  // (e.g., 1.2e+3) or the form \de[-+]\d+ (e.g., 1e+3).
-	  return [
-	    coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient,
-	    +x.slice(i + 1)
-	  ];
-	}
+	  return function (t) {
+	    for (k in i) {
+	      c[k] = i[k](t);
+	    }
 
-	function exponent(x) {
-	  return x = formatDecimal(Math.abs(x)), x ? x[1] : NaN;
+	    return c;
+	  };
 	}
 
-	function formatGroup(grouping, thousands) {
-	  return function(value, width) {
-	    var i = value.length,
-	        t = [],
-	        j = 0,
-	        g = grouping[0],
-	        length = 0;
-
-	    while (i > 0 && g > 0) {
-	      if (length + g + 1 > width) { g = Math.max(1, width - length); }
-	      t.push(value.substring(i -= g, i + g));
-	      if ((length += g + 1) > width) { break; }
-	      g = grouping[j = (j + 1) % grouping.length];
-	    }
+	var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g,
+	    reB = new RegExp(reA.source, "g");
 
-	    return t.reverse().join(thousands);
+	function zero(b) {
+	  return function () {
+	    return b;
 	  };
 	}
 
-	function formatNumerals(numerals) {
-	  return function(value) {
-	    return value.replace(/[0-9]/g, function(i) {
-	      return numerals[+i];
-	    });
+	function one(b) {
+	  return function (t) {
+	    return b(t) + "";
 	  };
 	}
 
-	// [[fill]align][sign][symbol][0][width][,][.precision][~][type]
-	var re = /^(?:(.)?([<>=^]))?([+\-( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?(~)?([a-z%])?$/i;
+	function interpolateString (a, b) {
+	  var bi = reA.lastIndex = reB.lastIndex = 0,
+	      // scan index for next number in b
+	  am,
+	      // current match in a
+	  bm,
+	      // current match in b
+	  bs,
+	      // string preceding current number in b, if any
+	  i = -1,
+	      // index in s
+	  s = [],
+	      // string constants and placeholders
+	  q = []; // number interpolators
+	  // Coerce inputs to strings.
 
-	function formatSpecifier(specifier) {
-	  if (!(match = re.exec(specifier))) { throw new Error("invalid format: " + specifier); }
-	  var match;
-	  return new FormatSpecifier({
-	    fill: match[1],
-	    align: match[2],
-	    sign: match[3],
-	    symbol: match[4],
-	    zero: match[5],
-	    width: match[6],
-	    comma: match[7],
-	    precision: match[8] && match[8].slice(1),
-	    trim: match[9],
-	    type: match[10]
-	  });
-	}
+	  a = a + "", b = b + ""; // Interpolate pairs of numbers in a & b.
 
-	formatSpecifier.prototype = FormatSpecifier.prototype; // instanceof
+	  while ((am = reA.exec(a)) && (bm = reB.exec(b))) {
+	    if ((bs = bm.index) > bi) {
+	      // a string precedes the next number in b
+	      bs = b.slice(bi, bs);
+	      if (s[i]) s[i] += bs; // coalesce with previous string
+	      else s[++i] = bs;
+	    }
 
-	function FormatSpecifier(specifier) {
-	  this.fill = specifier.fill === undefined ? " " : specifier.fill + "";
-	  this.align = specifier.align === undefined ? ">" : specifier.align + "";
-	  this.sign = specifier.sign === undefined ? "-" : specifier.sign + "";
-	  this.symbol = specifier.symbol === undefined ? "" : specifier.symbol + "";
-	  this.zero = !!specifier.zero;
-	  this.width = specifier.width === undefined ? undefined : +specifier.width;
-	  this.comma = !!specifier.comma;
-	  this.precision = specifier.precision === undefined ? undefined : +specifier.precision;
-	  this.trim = !!specifier.trim;
-	  this.type = specifier.type === undefined ? "" : specifier.type + "";
-	}
+	    if ((am = am[0]) === (bm = bm[0])) {
+	      // numbers in a & b match
+	      if (s[i]) s[i] += bm; // coalesce with previous string
+	      else s[++i] = bm;
+	    } else {
+	      // interpolate non-matching numbers
+	      s[++i] = null;
+	      q.push({
+	        i: i,
+	        x: d3_interpolateNumber(am, bm)
+	      });
+	    }
 
-	FormatSpecifier.prototype.toString = function() {
-	  return this.fill
-	      + this.align
-	      + this.sign
-	      + this.symbol
-	      + (this.zero ? "0" : "")
-	      + (this.width === undefined ? "" : Math.max(1, this.width | 0))
-	      + (this.comma ? "," : "")
-	      + (this.precision === undefined ? "" : "." + Math.max(0, this.precision | 0))
-	      + (this.trim ? "~" : "")
-	      + this.type;
-	};
+	    bi = reB.lastIndex;
+	  } // Add remains of b.
 
-	// Trims insignificant zeros, e.g., replaces 1.2000k with 1.2k.
-	function formatTrim(s) {
-	  out: for (var n = s.length, i = 1, i0 = -1, i1; i < n; ++i) {
-	    switch (s[i]) {
-	      case ".": i0 = i1 = i; break;
-	      case "0": if (i0 === 0) { i0 = i; } i1 = i; break;
-	      default: if (!+s[i]) { break out; } if (i0 > 0) { i0 = 0; } break;
+
+	  if (bi < b.length) {
+	    bs = b.slice(bi);
+	    if (s[i]) s[i] += bs; // coalesce with previous string
+	    else s[++i] = bs;
+	  } // Special optimization for only a single match.
+	  // Otherwise, interpolate each of the numbers and rejoin the string.
+
+
+	  return s.length < 2 ? q[0] ? one(q[0].x) : zero(b) : (b = q.length, function (t) {
+	    for (var i = 0, o; i < b; ++i) {
+	      s[(o = q[i]).i] = o.x(t);
 	    }
-	  }
-	  return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;
+
+	    return s.join("");
+	  });
 	}
 
-	var prefixExponent;
+	function interpolate$1 (a, b) {
+	  var t = _typeof(b),
+	      c;
 
-	function formatPrefixAuto(x, p) {
-	  var d = formatDecimal(x, p);
-	  if (!d) { return x + ""; }
-	  var coefficient = d[0],
-	      exponent = d[1],
-	      i = exponent - (prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1,
-	      n = coefficient.length;
-	  return i === n ? coefficient
-	      : i > n ? coefficient + new Array(i - n + 1).join("0")
-	      : i > 0 ? coefficient.slice(0, i) + "." + coefficient.slice(i)
-	      : "0." + new Array(1 - i).join("0") + formatDecimal(x, Math.max(0, p + i - 1))[0]; // less than 1y!
+	  return b == null || t === "boolean" ? constant$1(b) : (t === "number" ? d3_interpolateNumber : t === "string" ? (c = color(b)) ? (b = c, d3_interpolateRgb) : interpolateString : b instanceof color ? d3_interpolateRgb : b instanceof Date ? date : isNumberArray(b) ? numberArray : Array.isArray(b) ? genericArray : typeof b.valueOf !== "function" && typeof b.toString !== "function" || isNaN(b) ? object : d3_interpolateNumber)(a, b);
 	}
 
-	function formatRounded(x, p) {
-	  var d = formatDecimal(x, p);
-	  if (!d) { return x + ""; }
-	  var coefficient = d[0],
-	      exponent = d[1];
-	  return exponent < 0 ? "0." + new Array(-exponent).join("0") + coefficient
-	      : coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + "." + coefficient.slice(exponent + 1)
-	      : coefficient + new Array(exponent - coefficient.length + 2).join("0");
+	function interpolateRound (a, b) {
+	  return a = +a, b = +b, function (t) {
+	    return Math.round(a * (1 - t) + b * t);
+	  };
 	}
 
-	var formatTypes = {
-	  "%": function(x, p) { return (x * 100).toFixed(p); },
-	  "b": function(x) { return Math.round(x).toString(2); },
-	  "c": function(x) { return x + ""; },
-	  "d": function(x) { return Math.round(x).toString(10); },
-	  "e": function(x, p) { return x.toExponential(p); },
-	  "f": function(x, p) { return x.toFixed(p); },
-	  "g": function(x, p) { return x.toPrecision(p); },
-	  "o": function(x) { return Math.round(x).toString(8); },
-	  "p": function(x, p) { return formatRounded(x * 100, p); },
-	  "r": formatRounded,
-	  "s": formatPrefixAuto,
-	  "X": function(x) { return Math.round(x).toString(16).toUpperCase(); },
-	  "x": function(x) { return Math.round(x).toString(16); }
+	var degrees = 180 / Math.PI;
+	var identity$3 = {
+	  translateX: 0,
+	  translateY: 0,
+	  rotate: 0,
+	  skewX: 0,
+	  scaleX: 1,
+	  scaleY: 1
 	};
-
-	function identity$4(x) {
-	  return x;
+	function decompose (a, b, c, d, e, f) {
+	  var scaleX, scaleY, skewX;
+	  if (scaleX = Math.sqrt(a * a + b * b)) a /= scaleX, b /= scaleX;
+	  if (skewX = a * c + b * d) c -= a * skewX, d -= b * skewX;
+	  if (scaleY = Math.sqrt(c * c + d * d)) c /= scaleY, d /= scaleY, skewX /= scaleY;
+	  if (a * d < b * c) a = -a, b = -b, skewX = -skewX, scaleX = -scaleX;
+	  return {
+	    translateX: e,
+	    translateY: f,
+	    rotate: Math.atan2(b, a) * degrees,
+	    skewX: Math.atan(skewX) * degrees,
+	    scaleX: scaleX,
+	    scaleY: scaleY
+	  };
 	}
 
-	var map$4 = Array.prototype.map,
-	    prefixes = ["y","z","a","f","p","n","µ","m","","k","M","G","T","P","E","Z","Y"];
-
-	function formatLocale(locale) {
-	  var group = locale.grouping === undefined || locale.thousands === undefined ? identity$4 : formatGroup(map$4.call(locale.grouping, Number), locale.thousands + ""),
-	      currencyPrefix = locale.currency === undefined ? "" : locale.currency[0] + "",
-	      currencySuffix = locale.currency === undefined ? "" : locale.currency[1] + "",
-	      decimal = locale.decimal === undefined ? "." : locale.decimal + "",
-	      numerals = locale.numerals === undefined ? identity$4 : formatNumerals(map$4.call(locale.numerals, String)),
-	      percent = locale.percent === undefined ? "%" : locale.percent + "",
-	      minus = locale.minus === undefined ? "-" : locale.minus + "",
-	      nan = locale.nan === undefined ? "NaN" : locale.nan + "";
+	var svgNode;
+	/* eslint-disable no-undef */
 
-	  function newFormat(specifier) {
-	    specifier = formatSpecifier(specifier);
+	function parseCss(value) {
+	  var m = new (typeof DOMMatrix === "function" ? DOMMatrix : WebKitCSSMatrix)(value + "");
+	  return m.isIdentity ? identity$3 : decompose(m.a, m.b, m.c, m.d, m.e, m.f);
+	}
+	function parseSvg(value) {
+	  if (value == null) return identity$3;
+	  if (!svgNode) svgNode = document.createElementNS("http://www.w3.org/2000/svg", "g");
+	  svgNode.setAttribute("transform", value);
+	  if (!(value = svgNode.transform.baseVal.consolidate())) return identity$3;
+	  value = value.matrix;
+	  return decompose(value.a, value.b, value.c, value.d, value.e, value.f);
+	}
 
-	    var fill = specifier.fill,
-	        align = specifier.align,
-	        sign = specifier.sign,
-	        symbol = specifier.symbol,
-	        zero = specifier.zero,
-	        width = specifier.width,
-	        comma = specifier.comma,
-	        precision = specifier.precision,
-	        trim = specifier.trim,
-	        type = specifier.type;
+	function interpolateTransform(parse, pxComma, pxParen, degParen) {
+	  function pop(s) {
+	    return s.length ? s.pop() + " " : "";
+	  }
 
-	    // The "n" type is an alias for ",g".
-	    if (type === "n") { comma = true, type = "g"; }
+	  function translate(xa, ya, xb, yb, s, q) {
+	    if (xa !== xb || ya !== yb) {
+	      var i = s.push("translate(", null, pxComma, null, pxParen);
+	      q.push({
+	        i: i - 4,
+	        x: d3_interpolateNumber(xa, xb)
+	      }, {
+	        i: i - 2,
+	        x: d3_interpolateNumber(ya, yb)
+	      });
+	    } else if (xb || yb) {
+	      s.push("translate(" + xb + pxComma + yb + pxParen);
+	    }
+	  }
 
-	    // The "" type, and any invalid type, is an alias for ".12~g".
-	    else if (!formatTypes[type]) { precision === undefined && (precision = 12), trim = true, type = "g"; }
+	  function rotate(a, b, s, q) {
+	    if (a !== b) {
+	      if (a - b > 180) b += 360;else if (b - a > 180) a += 360; // shortest path
 
-	    // If zero fill is specified, padding goes after sign and before digits.
-	    if (zero || (fill === "0" && align === "=")) { zero = true, fill = "0", align = "="; }
+	      q.push({
+	        i: s.push(pop(s) + "rotate(", null, degParen) - 2,
+	        x: d3_interpolateNumber(a, b)
+	      });
+	    } else if (b) {
+	      s.push(pop(s) + "rotate(" + b + degParen);
+	    }
+	  }
 
-	    // Compute the prefix and suffix.
-	    // For SI-prefix, the suffix is lazily computed.
-	    var prefix = symbol === "$" ? currencyPrefix : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "",
-	        suffix = symbol === "$" ? currencySuffix : /[%p]/.test(type) ? percent : "";
+	  function skewX(a, b, s, q) {
+	    if (a !== b) {
+	      q.push({
+	        i: s.push(pop(s) + "skewX(", null, degParen) - 2,
+	        x: d3_interpolateNumber(a, b)
+	      });
+	    } else if (b) {
+	      s.push(pop(s) + "skewX(" + b + degParen);
+	    }
+	  }
 
-	    // What format function should we use?
-	    // Is this an integer type?
-	    // Can this type generate exponential notation?
-	    var formatType = formatTypes[type],
-	        maybeSuffix = /[defgprs%]/.test(type);
+	  function scale(xa, ya, xb, yb, s, q) {
+	    if (xa !== xb || ya !== yb) {
+	      var i = s.push(pop(s) + "scale(", null, ",", null, ")");
+	      q.push({
+	        i: i - 4,
+	        x: d3_interpolateNumber(xa, xb)
+	      }, {
+	        i: i - 2,
+	        x: d3_interpolateNumber(ya, yb)
+	      });
+	    } else if (xb !== 1 || yb !== 1) {
+	      s.push(pop(s) + "scale(" + xb + "," + yb + ")");
+	    }
+	  }
 
-	    // Set the default precision if not specified,
-	    // or clamp the specified precision to the supported range.
-	    // For significant precision, it must be in [1, 21].
-	    // For fixed precision, it must be in [0, 20].
-	    precision = precision === undefined ? 6
-	        : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision))
-	        : Math.max(0, Math.min(20, precision));
+	  return function (a, b) {
+	    var s = [],
+	        // string constants and placeholders
+	    q = []; // number interpolators
 
-	    function format(value) {
-	      var valuePrefix = prefix,
-	          valueSuffix = suffix,
-	          i, n, c;
+	    a = parse(a), b = parse(b);
+	    translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);
+	    rotate(a.rotate, b.rotate, s, q);
+	    skewX(a.skewX, b.skewX, s, q);
+	    scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);
+	    a = b = null; // gc
 
-	      if (type === "c") {
-	        valueSuffix = formatType(value) + valueSuffix;
-	        value = "";
-	      } else {
-	        value = +value;
+	    return function (t) {
+	      var i = -1,
+	          n = q.length,
+	          o;
 
-	        // Determine the sign. -0 is not less than 0, but 1 / -0 is!
-	        var valueNegative = value < 0 || 1 / value < 0;
+	      while (++i < n) {
+	        s[(o = q[i]).i] = o.x(t);
+	      }
 
-	        // Perform the initial formatting.
-	        value = isNaN(value) ? nan : formatType(Math.abs(value), precision);
+	      return s.join("");
+	    };
+	  };
+	}
 
-	        // Trim insignificant zeros.
-	        if (trim) { value = formatTrim(value); }
+	var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)");
+	var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")");
 
-	        // If a negative value rounds to zero after formatting, and no explicit positive sign is requested, hide the sign.
-	        if (valueNegative && +value === 0 && sign !== "+") { valueNegative = false; }
+	var epsilon2 = 1e-12;
 
-	        // Compute the prefix and suffix.
-	        valuePrefix = (valueNegative ? (sign === "(" ? sign : minus) : sign === "-" || sign === "(" ? "" : sign) + valuePrefix;
-	        valueSuffix = (type === "s" ? prefixes[8 + prefixExponent / 3] : "") + valueSuffix + (valueNegative && sign === "(" ? ")" : "");
+	function cosh(x) {
+	  return ((x = Math.exp(x)) + 1 / x) / 2;
+	}
 
-	        // Break the formatted value into the integer “value” part that can be
-	        // grouped, and fractional or exponential “suffix” part that is not.
-	        if (maybeSuffix) {
-	          i = -1, n = value.length;
-	          while (++i < n) {
-	            if (c = value.charCodeAt(i), 48 > c || c > 57) {
-	              valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;
-	              value = value.slice(0, i);
-	              break;
-	            }
-	          }
-	        }
-	      }
+	function sinh(x) {
+	  return ((x = Math.exp(x)) - 1 / x) / 2;
+	}
 
-	      // If the fill character is not "0", grouping is applied before padding.
-	      if (comma && !zero) { value = group(value, Infinity); }
+	function tanh(x) {
+	  return ((x = Math.exp(2 * x)) - 1) / (x + 1);
+	}
 
-	      // Compute the padding.
-	      var length = valuePrefix.length + value.length + valueSuffix.length,
-	          padding = length < width ? new Array(width - length + 1).join(fill) : "";
+	var interpolateZoom = (function zoomRho(rho, rho2, rho4) {
+	  // p0 = [ux0, uy0, w0]
+	  // p1 = [ux1, uy1, w1]
+	  function zoom(p0, p1) {
+	    var ux0 = p0[0],
+	        uy0 = p0[1],
+	        w0 = p0[2],
+	        ux1 = p1[0],
+	        uy1 = p1[1],
+	        w1 = p1[2],
+	        dx = ux1 - ux0,
+	        dy = uy1 - uy0,
+	        d2 = dx * dx + dy * dy,
+	        i,
+	        S; // Special case for u0 ≅ u1.
+
+	    if (d2 < epsilon2) {
+	      S = Math.log(w1 / w0) / rho;
+
+	      i = function i(t) {
+	        return [ux0 + t * dx, uy0 + t * dy, w0 * Math.exp(rho * t * S)];
+	      };
+	    } // General case.
+	    else {
+	        var d1 = Math.sqrt(d2),
+	            b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),
+	            b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),
+	            r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),
+	            r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);
+	        S = (r1 - r0) / rho;
+
+	        i = function i(t) {
+	          var s = t * S,
+	              coshr0 = cosh(r0),
+	              u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));
+	          return [ux0 + u * dx, uy0 + u * dy, w0 * coshr0 / cosh(rho * s + r0)];
+	        };
+	      }
 
-	      // If the fill character is "0", grouping is applied after padding.
-	      if (comma && zero) { value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = ""; }
+	    i.duration = S * 1000 * rho / Math.SQRT2;
+	    return i;
+	  }
 
-	      // Reconstruct the final output based on the desired alignment.
-	      switch (align) {
-	        case "<": value = valuePrefix + value + valueSuffix + padding; break;
-	        case "=": value = valuePrefix + padding + value + valueSuffix; break;
-	        case "^": value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length); break;
-	        default: value = padding + valuePrefix + value + valueSuffix; break;
-	      }
+	  zoom.rho = function (_) {
+	    var _1 = Math.max(1e-3, +_),
+	        _2 = _1 * _1,
+	        _4 = _2 * _2;
 
-	      return numerals(value);
-	    }
+	    return zoomRho(_1, _2, _4);
+	  };
 
-	    format.toString = function() {
-	      return specifier + "";
-	    };
+	  return zoom;
+	})(Math.SQRT2, 2, 4);
 
-	    return format;
-	  }
+	function d3_quantize (interpolator, n) {
+	  var samples = new Array(n);
 
-	  function formatPrefix(specifier, value) {
-	    var f = newFormat((specifier = formatSpecifier(specifier), specifier.type = "f", specifier)),
-	        e = Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3,
-	        k = Math.pow(10, -e),
-	        prefix = prefixes[8 + e / 3];
-	    return function(value) {
-	      return f(k * value) + prefix;
-	    };
+	  for (var i = 0; i < n; ++i) {
+	    samples[i] = interpolator(i / (n - 1));
 	  }
 
-	  return {
-	    format: newFormat,
-	    formatPrefix: formatPrefix
-	  };
+	  return samples;
 	}
 
-	var locale;
-	var format;
-	var formatPrefix;
+	var $$m = _export;
+	var bind$2 = functionBind;
 
-	defaultLocale({
-	  decimal: ".",
-	  thousands: ",",
-	  grouping: [3],
-	  currency: ["$", ""],
-	  minus: "-"
+	// `Function.prototype.bind` method
+	// https://tc39.es/ecma262/#sec-function.prototype.bind
+	$$m({ target: 'Function', proto: true }, {
+	  bind: bind$2
 	});
 
-	function defaultLocale(definition) {
-	  locale = formatLocale(definition);
-	  format = locale.format;
-	  formatPrefix = locale.formatPrefix;
-	  return locale;
-	}
-
-	function precisionFixed(step) {
-	  return Math.max(0, -exponent(Math.abs(step)));
+	var frame = 0,
+	    // is an animation frame pending?
+	timeout = 0,
+	    // is a timeout pending?
+	interval = 0,
+	    // are any timers active?
+	pokeDelay = 1000,
+	    // how frequently we check for clock skew
+	taskHead,
+	    taskTail,
+	    clockLast = 0,
+	    clockNow = 0,
+	    clockSkew = 0,
+	    clock = (typeof performance === "undefined" ? "undefined" : _typeof(performance)) === "object" && performance.now ? performance : Date,
+	    setFrame = (typeof window === "undefined" ? "undefined" : _typeof(window)) === "object" && window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) : function (f) {
+	  setTimeout(f, 17);
+	};
+	function now$1() {
+	  return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);
 	}
 
-	function precisionPrefix(step, value) {
-	  return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3 - exponent(Math.abs(step)));
+	function clearNow() {
+	  clockNow = 0;
 	}
 
-	function precisionRound(step, max) {
-	  step = Math.abs(step), max = Math.abs(max) - step;
-	  return Math.max(0, exponent(max) - exponent(step)) + 1;
+	function Timer() {
+	  this._call = this._time = this._next = null;
 	}
+	Timer.prototype = timer.prototype = {
+	  constructor: Timer,
+	  restart: function restart(callback, delay, time) {
+	    if (typeof callback !== "function") throw new TypeError("callback is not a function");
+	    time = (time == null ? now$1() : +time) + (delay == null ? 0 : +delay);
 
-	function tickFormat(start, stop, count, specifier) {
-	  var step = tickStep(start, stop, count),
-	      precision;
-	  specifier = formatSpecifier(specifier == null ? ",f" : specifier);
-	  switch (specifier.type) {
-	    case "s": {
-	      var value = Math.max(Math.abs(start), Math.abs(stop));
-	      if (specifier.precision == null && !isNaN(precision = precisionPrefix(step, value))) { specifier.precision = precision; }
-	      return formatPrefix(specifier, value);
-	    }
-	    case "":
-	    case "e":
-	    case "g":
-	    case "p":
-	    case "r": {
-	      if (specifier.precision == null && !isNaN(precision = precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) { specifier.precision = precision - (specifier.type === "e"); }
-	      break;
+	    if (!this._next && taskTail !== this) {
+	      if (taskTail) taskTail._next = this;else taskHead = this;
+	      taskTail = this;
 	    }
-	    case "f":
-	    case "%": {
-	      if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) { specifier.precision = precision - (specifier.type === "%") * 2; }
-	      break;
+
+	    this._call = callback;
+	    this._time = time;
+	    sleep();
+	  },
+	  stop: function stop() {
+	    if (this._call) {
+	      this._call = null;
+	      this._time = Infinity;
+	      sleep();
 	    }
 	  }
-	  return format(specifier);
+	};
+	function timer(callback, delay, time) {
+	  var t = new Timer();
+	  t.restart(callback, delay, time);
+	  return t;
 	}
+	function timerFlush() {
+	  now$1(); // Get the current time, if not already set.
 
-	function linearish(scale) {
-	  var domain = scale.domain;
-
-	  scale.ticks = function(count) {
-	    var d = domain();
-	    return ticks(d[0], d[d.length - 1], count == null ? 10 : count);
-	  };
-
-	  scale.tickFormat = function(count, specifier) {
-	    var d = domain();
-	    return tickFormat(d[0], d[d.length - 1], count == null ? 10 : count, specifier);
-	  };
-
-	  scale.nice = function(count) {
-	    if (count == null) { count = 10; }
-
-	    var d = domain(),
-	        i0 = 0,
-	        i1 = d.length - 1,
-	        start = d[i0],
-	        stop = d[i1],
-	        step;
-
-	    if (stop < start) {
-	      step = start, start = stop, stop = step;
-	      step = i0, i0 = i1, i1 = step;
-	    }
-
-	    step = tickIncrement(start, stop, count);
-
-	    if (step > 0) {
-	      start = Math.floor(start / step) * step;
-	      stop = Math.ceil(stop / step) * step;
-	      step = tickIncrement(start, stop, count);
-	    } else if (step < 0) {
-	      start = Math.ceil(start * step) / step;
-	      stop = Math.floor(stop * step) / step;
-	      step = tickIncrement(start, stop, count);
-	    }
+	  ++frame; // Pretend we’ve set an alarm, if we haven’t already.
 
-	    if (step > 0) {
-	      d[i0] = Math.floor(start / step) * step;
-	      d[i1] = Math.ceil(stop / step) * step;
-	      domain(d);
-	    } else if (step < 0) {
-	      d[i0] = Math.ceil(start * step) / step;
-	      d[i1] = Math.floor(stop * step) / step;
-	      domain(d);
-	    }
+	  var t = taskHead,
+	      e;
 
-	    return scale;
-	  };
+	  while (t) {
+	    if ((e = clockNow - t._time) >= 0) t._call.call(null, e);
+	    t = t._next;
+	  }
 
-	  return scale;
+	  --frame;
 	}
 
-	function linear$2() {
-	  var scale = continuous(identity$3, identity$3);
-
-	  scale.copy = function() {
-	    return copy$1(scale, linear$2());
-	  };
-
-	  initRange.apply(scale, arguments);
+	function wake() {
+	  clockNow = (clockLast = clock.now()) + clockSkew;
+	  frame = timeout = 0;
 
-	  return linearish(scale);
+	  try {
+	    timerFlush();
+	  } finally {
+	    frame = 0;
+	    nap();
+	    clockNow = 0;
+	  }
 	}
 
-	function quantize() {
-	  var x0 = 0,
-	      x1 = 1,
-	      n = 1,
-	      domain = [0.5],
-	      range = [0, 1],
-	      unknown;
+	function poke() {
+	  var now = clock.now(),
+	      delay = now - clockLast;
+	  if (delay > pokeDelay) clockSkew -= delay, clockLast = now;
+	}
 
-	  function scale(x) {
-	    return x <= x ? range[bisectRight(domain, x, 0, n)] : unknown;
-	  }
+	function nap() {
+	  var t0,
+	      t1 = taskHead,
+	      t2,
+	      time = Infinity;
 
-	  function rescale() {
-	    var i = -1;
-	    domain = new Array(n);
-	    while (++i < n) { domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1); }
-	    return scale;
+	  while (t1) {
+	    if (t1._call) {
+	      if (time > t1._time) time = t1._time;
+	      t0 = t1, t1 = t1._next;
+	    } else {
+	      t2 = t1._next, t1._next = null;
+	      t1 = t0 ? t0._next = t2 : taskHead = t2;
+	    }
 	  }
 
-	  scale.domain = function(_) {
-	    return arguments.length ? (x0 = +_[0], x1 = +_[1], rescale()) : [x0, x1];
-	  };
-
-	  scale.range = function(_) {
-	    return arguments.length ? (n = (range = slice$4.call(_)).length - 1, rescale()) : range.slice();
-	  };
+	  taskTail = t0;
+	  sleep(time);
+	}
 
-	  scale.invertExtent = function(y) {
-	    var i = range.indexOf(y);
-	    return i < 0 ? [NaN, NaN]
-	        : i < 1 ? [x0, domain[0]]
-	        : i >= n ? [domain[n - 1], x1]
-	        : [domain[i - 1], domain[i]];
-	  };
+	function sleep(time) {
+	  if (frame) return; // Soonest alarm already set, or will be.
 
-	  scale.unknown = function(_) {
-	    return arguments.length ? (unknown = _, scale) : scale;
-	  };
+	  if (timeout) timeout = clearTimeout(timeout);
+	  var delay = time - clockNow; // Strictly less than if we recomputed clockNow.
 
-	  scale.thresholds = function() {
-	    return domain.slice();
-	  };
+	  if (delay > 24) {
+	    if (time < Infinity) timeout = setTimeout(wake, time - clock.now() - clockSkew);
+	    if (interval) interval = clearInterval(interval);
+	  } else {
+	    if (!interval) clockLast = clock.now(), interval = setInterval(poke, pokeDelay);
+	    frame = 1, setFrame(wake);
+	  }
+	}
 
-	  scale.copy = function() {
-	    return quantize()
-	        .domain([x0, x1])
-	        .range(range)
-	        .unknown(unknown);
-	  };
+	function d3_timeout (callback, delay, time) {
+	  var t = new Timer();
+	  delay = delay == null ? 0 : +delay;
+	  t.restart(function (elapsed) {
+	    t.stop();
+	    callback(elapsed + delay);
+	  }, delay, time);
+	  return t;
+	}
 
-	  return initRange.apply(linearish(scale), arguments);
+	var emptyOn = dispatch$8("start", "end", "cancel", "interrupt");
+	var emptyTween = [];
+	var CREATED = 0;
+	var SCHEDULED = 1;
+	var STARTING = 2;
+	var STARTED = 3;
+	var RUNNING = 4;
+	var ENDING = 5;
+	var ENDED = 6;
+	function schedule (node, name, id, index, group, timing) {
+	  var schedules = node.__transition;
+	  if (!schedules) node.__transition = {};else if (id in schedules) return;
+	  create$3(node, id, {
+	    name: name,
+	    index: index,
+	    // For context during callback.
+	    group: group,
+	    // For context during callback.
+	    on: emptyOn,
+	    tween: emptyTween,
+	    time: timing.time,
+	    delay: timing.delay,
+	    duration: timing.duration,
+	    ease: timing.ease,
+	    timer: null,
+	    state: CREATED
+	  });
+	}
+	function init(node, id) {
+	  var schedule = get$1(node, id);
+	  if (schedule.state > CREATED) throw new Error("too late; already scheduled");
+	  return schedule;
+	}
+	function set(node, id) {
+	  var schedule = get$1(node, id);
+	  if (schedule.state > STARTED) throw new Error("too late; already running");
+	  return schedule;
+	}
+	function get$1(node, id) {
+	  var schedule = node.__transition;
+	  if (!schedule || !(schedule = schedule[id])) throw new Error("transition not found");
+	  return schedule;
 	}
 
-	function behaviorBreathe() {
-	    var duration = 800;
-	    var steps = 4;
-	    var selector = '.selected.shadow, .selected .shadow';
-	    var _selected = select(null);
-	    var _classed = '';
-	    var _params = {};
-	    var _done = false;
-	    var _timer;
-
-
-	    function ratchetyInterpolator(a, b, steps, units) {
-	        a = parseFloat(a);
-	        b = parseFloat(b);
-	        var sample = quantize()
-	            .domain([0, 1])
-	            .range(d3_quantize(d3_interpolateNumber(a, b), steps));
-
-	        return function(t) {
-	            return String(sample(t)) + (units || '');
-	        };
-	    }
+	function create$3(node, id, self) {
+	  var schedules = node.__transition,
+	      tween; // Initialize the self timer when the transition is created.
+	  // Note the actual delay is not known until the first callback!
 
+	  schedules[id] = self;
+	  self.timer = timer(schedule, 0, self.time);
 
-	    function reset(selection) {
-	        selection
-	            .style('stroke-opacity', null)
-	            .style('stroke-width', null)
-	            .style('fill-opacity', null)
-	            .style('r', null);
-	    }
+	  function schedule(elapsed) {
+	    self.state = SCHEDULED;
+	    self.timer.restart(start, self.delay, self.time); // If the elapsed delay is less than our first sleep, start immediately.
 
+	    if (self.delay <= elapsed) start(elapsed - self.delay);
+	  }
 
-	    function setAnimationParams(transition, fromTo) {
-	        var toFrom = (fromTo === 'from' ? 'to' : 'from');
+	  function start(elapsed) {
+	    var i, j, n, o; // If the state is not SCHEDULED, then we previously errored on start.
 
-	        transition
-	            .styleTween('stroke-opacity', function(d) {
-	                return ratchetyInterpolator(
-	                    _params[d.id][toFrom].opacity,
-	                    _params[d.id][fromTo].opacity,
-	                    steps
-	                );
-	            })
-	            .styleTween('stroke-width', function(d) {
-	                return ratchetyInterpolator(
-	                    _params[d.id][toFrom].width,
-	                    _params[d.id][fromTo].width,
-	                    steps,
-	                    'px'
-	                );
-	            })
-	            .styleTween('fill-opacity', function(d) {
-	                return ratchetyInterpolator(
-	                    _params[d.id][toFrom].opacity,
-	                    _params[d.id][fromTo].opacity,
-	                    steps
-	                );
-	            })
-	            .styleTween('r', function(d) {
-	                return ratchetyInterpolator(
-	                    _params[d.id][toFrom].width,
-	                    _params[d.id][fromTo].width,
-	                    steps,
-	                    'px'
-	                );
-	            });
-	    }
+	    if (self.state !== SCHEDULED) return stop();
 
+	    for (i in schedules) {
+	      o = schedules[i];
+	      if (o.name !== self.name) continue; // While this element already has a starting transition during this frame,
+	      // defer starting an interrupting transition until that transition has a
+	      // chance to tick (and possibly end); see d3/d3-transition#54!
 
-	    function calcAnimationParams(selection) {
-	        selection
-	            .call(reset)
-	            .each(function(d) {
-	                var s = select(this);
-	                var tag = s.node().tagName;
-	                var p = {'from': {}, 'to': {}};
-	                var opacity;
-	                var width;
+	      if (o.state === STARTED) return d3_timeout(start); // Interrupt the active transition, if any.
 
-	                // determine base opacity and width
-	                if (tag === 'circle') {
-	                    opacity = parseFloat(s.style('fill-opacity') || 0.5);
-	                    width = parseFloat(s.style('r') || 15.5);
-	                } else {
-	                    opacity = parseFloat(s.style('stroke-opacity') || 0.7);
-	                    width = parseFloat(s.style('stroke-width') || 10);
-	                }
+	      if (o.state === RUNNING) {
+	        o.state = ENDED;
+	        o.timer.stop();
+	        o.on.call("interrupt", node, node.__data__, o.index, o.group);
+	        delete schedules[i];
+	      } // Cancel any pre-empted transitions.
+	      else if (+i < id) {
+	          o.state = ENDED;
+	          o.timer.stop();
+	          o.on.call("cancel", node, node.__data__, o.index, o.group);
+	          delete schedules[i];
+	        }
+	    } // Defer the first tick to end of the current frame; see d3/d3#1576.
+	    // Note the transition may be canceled after start and before the first tick!
+	    // Note this must be scheduled before the start event; see d3/d3-transition#16!
+	    // Assuming this is successful, subsequent callbacks go straight to tick.
 
-	                // calculate from/to interpolation params..
-	                p.tag = tag;
-	                p.from.opacity = opacity * 0.6;
-	                p.to.opacity = opacity * 1.25;
-	                p.from.width = width * 0.7;
-	                p.to.width = width * (tag === 'circle' ? 1.5 : 1);
-	                _params[d.id] = p;
-	            });
-	    }
 
+	    d3_timeout(function () {
+	      if (self.state === STARTED) {
+	        self.state = RUNNING;
+	        self.timer.restart(tick, self.delay, self.time);
+	        tick(elapsed);
+	      }
+	    }); // Dispatch the start event.
+	    // Note this must be done before the tween are initialized.
+
+	    self.state = STARTING;
+	    self.on.call("start", node, node.__data__, self.index, self.group);
+	    if (self.state !== STARTING) return; // interrupted
 
-	    function run(surface, fromTo) {
-	        var toFrom = (fromTo === 'from' ? 'to' : 'from');
-	        var currSelected = surface.selectAll(selector);
-	        var currClassed = surface.attr('class');
+	    self.state = STARTED; // Initialize the tween, deleting null tween.
 
-	        if (_done || currSelected.empty()) {
-	            _selected.call(reset);
-	            _selected = select(null);
-	            return;
-	        }
+	    tween = new Array(n = self.tween.length);
 
-	        if (!fastDeepEqual(currSelected.data(), _selected.data()) || currClassed !== _classed) {
-	            _selected.call(reset);
-	            _classed = currClassed;
-	            _selected = currSelected.call(calcAnimationParams);
-	        }
+	    for (i = 0, j = -1; i < n; ++i) {
+	      if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) {
+	        tween[++j] = o;
+	      }
+	    }
 
-	        var didCallNextRun = false;
+	    tween.length = j + 1;
+	  }
 
-	        _selected
-	            .transition()
-	            .duration(duration)
-	            .call(setAnimationParams, fromTo)
-	            .on('end', function() {
-	                // `end` event is called for each selected element, but we want
-	                // it to run only once
-	                if (!didCallNextRun) {
-	                    surface.call(run, toFrom);
-	                    didCallNextRun = true;
-	                }
+	  function tick(elapsed) {
+	    var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1),
+	        i = -1,
+	        n = tween.length;
 
-	                // if entity was deselected, remove breathe styling
-	                if (!select(this).classed('selected')) {
-	                    reset(select(this));
-	                }
-	            });
-	    }
+	    while (++i < n) {
+	      tween[i].call(node, t);
+	    } // Dispatch the end event.
 
-	    function behavior(surface) {
-	        _done = false;
-	        _timer = timer(function() {
-	            // wait for elements to actually become selected
-	            if (surface.selectAll(selector).empty()) {
-	                return false;
-	            }
 
-	            surface.call(run, 'from');
-	            _timer.stop();
-	            return true;
-	        }, 20);
+	    if (self.state === ENDING) {
+	      self.on.call("end", node, node.__data__, self.index, self.group);
+	      stop();
 	    }
+	  }
 
-	    behavior.restartIfNeeded = function(surface) {
-	        if (_selected.empty()) {
-	            surface.call(run, 'from');
-	            if (_timer) {
-	                _timer.stop();
-	            }
-	        }
-	    };
+	  function stop() {
+	    self.state = ENDED;
+	    self.timer.stop();
+	    delete schedules[id];
 
-	    behavior.off = function() {
-	        _done = true;
-	        if (_timer) {
-	            _timer.stop();
-	        }
-	        _selected
-	            .interrupt()
-	            .call(reset);
-	    };
+	    for (var i in schedules) {
+	      return;
+	    } // eslint-disable-line no-unused-vars
 
 
-	    return behavior;
+	    delete node.__transition;
+	  }
 	}
 
-	/* Creates a keybinding behavior for an operation */
-	function behaviorOperation(context) {
-	    var _operation;
+	function interrupt (node, name) {
+	  var schedules = node.__transition,
+	      schedule,
+	      active,
+	      empty = true,
+	      i;
+	  if (!schedules) return;
+	  name = name == null ? null : name + "";
 
-	    function keypress() {
-	        // prevent operations during low zoom selection
-	        if (!context.map().withinEditableZoom()) { return; }
+	  for (i in schedules) {
+	    if ((schedule = schedules[i]).name !== name) {
+	      empty = false;
+	      continue;
+	    }
 
-	        if (_operation.availableForKeypress && !_operation.availableForKeypress()) { return; }
+	    active = schedule.state > STARTING && schedule.state < ENDING;
+	    schedule.state = ENDED;
+	    schedule.timer.stop();
+	    schedule.on.call(active ? "interrupt" : "cancel", node, node.__data__, schedule.index, schedule.group);
+	    delete schedules[i];
+	  }
 
-	        event.preventDefault();
+	  if (empty) delete node.__transition;
+	}
 
-	        var disabled = _operation.disabled();
+	function selection_interrupt (name) {
+	  return this.each(function () {
+	    interrupt(this, name);
+	  });
+	}
 
-	        if (disabled) {
-	            context.ui().flash
-	                .duration(4000)
-	                .iconName('#iD-operation-' + _operation.id)
-	                .iconClass('operation disabled')
-	                .text(_operation.tooltip)();
+	function tweenRemove(id, name) {
+	  var tween0, tween1;
+	  return function () {
+	    var schedule = set(this, id),
+	        tween = schedule.tween; // If this node shared tween with the previous node,
+	    // just assign the updated shared tween and we’re done!
+	    // Otherwise, copy-on-write.
 
-	        } else {
-	            context.ui().flash
-	                .duration(2000)
-	                .iconName('#iD-operation-' + _operation.id)
-	                .iconClass('operation')
-	                .text(_operation.annotation() || _operation.title)();
+	    if (tween !== tween0) {
+	      tween1 = tween0 = tween;
 
-	            if (_operation.point) { _operation.point(null); }
-	            _operation();
+	      for (var i = 0, n = tween1.length; i < n; ++i) {
+	        if (tween1[i].name === name) {
+	          tween1 = tween1.slice();
+	          tween1.splice(i, 1);
+	          break;
 	        }
+	      }
 	    }
 
+	    schedule.tween = tween1;
+	  };
+	}
+
+	function tweenFunction(id, name, value) {
+	  var tween0, tween1;
+	  if (typeof value !== "function") throw new Error();
+	  return function () {
+	    var schedule = set(this, id),
+	        tween = schedule.tween; // If this node shared tween with the previous node,
+	    // just assign the updated shared tween and we’re done!
+	    // Otherwise, copy-on-write.
+
+	    if (tween !== tween0) {
+	      tween1 = (tween0 = tween).slice();
 
-	    function behavior() {
-	        if (_operation && _operation.available()) {
-	            context.keybinding()
-	                .on(_operation.keys, keypress);
+	      for (var t = {
+	        name: name,
+	        value: value
+	      }, i = 0, n = tween1.length; i < n; ++i) {
+	        if (tween1[i].name === name) {
+	          tween1[i] = t;
+	          break;
 	        }
+	      }
 
-	        return behavior;
+	      if (i === n) tween1.push(t);
 	    }
 
+	    schedule.tween = tween1;
+	  };
+	}
 
-	    behavior.off = function() {
-	        context.keybinding()
-	            .off(_operation.keys);
-	    };
+	function transition_tween (name, value) {
+	  var id = this._id;
+	  name += "";
 
+	  if (arguments.length < 2) {
+	    var tween = get$1(this.node(), id).tween;
 
-	    behavior.which = function (_) {
-	        if (!arguments.length) { return _operation; }
-	        _operation = _;
-	        return behavior;
-	    };
+	    for (var i = 0, n = tween.length, t; i < n; ++i) {
+	      if ((t = tween[i]).name === name) {
+	        return t.value;
+	      }
+	    }
 
+	    return null;
+	  }
 
-	    return behavior;
+	  return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));
+	}
+	function tweenValue(transition, name, value) {
+	  var id = transition._id;
+	  transition.each(function () {
+	    var schedule = set(this, id);
+	    (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);
+	  });
+	  return function (node) {
+	    return get$1(node, id).value[name];
+	  };
 	}
 
-	function operationCircularize(context, selectedIDs) {
-	    var _extent;
-	    var _actions = selectedIDs.map(getAction).filter(Boolean);
-	    var _amount = _actions.length === 1 ? 'single' : 'multiple';
-	    var _coords = utilGetAllNodes(selectedIDs, context.graph())
-	        .map(function(n) { return n.loc; });
+	function interpolate (a, b) {
+	  var c;
+	  return (typeof b === "number" ? d3_interpolateNumber : b instanceof color ? d3_interpolateRgb : (c = color(b)) ? (b = c, d3_interpolateRgb) : interpolateString)(a, b);
+	}
 
-	    function getAction(entityID) {
+	function attrRemove(name) {
+	  return function () {
+	    this.removeAttribute(name);
+	  };
+	}
 
-	        var entity = context.entity(entityID);
+	function attrRemoveNS(fullname) {
+	  return function () {
+	    this.removeAttributeNS(fullname.space, fullname.local);
+	  };
+	}
 
-	        if (entity.type !== 'way' || new Set(entity.nodes).size <= 1) { return null; }
+	function attrConstant(name, interpolate, value1) {
+	  var string00,
+	      string1 = value1 + "",
+	      interpolate0;
+	  return function () {
+	    var string0 = this.getAttribute(name);
+	    return string0 === string1 ? null : string0 === string00 ? interpolate0 : interpolate0 = interpolate(string00 = string0, value1);
+	  };
+	}
 
-	        if (!_extent) {
-	            _extent =  entity.extent(context.graph());
-	        } else {
-	            _extent = _extent.extend(entity.extent(context.graph()));
-	        }
+	function attrConstantNS(fullname, interpolate, value1) {
+	  var string00,
+	      string1 = value1 + "",
+	      interpolate0;
+	  return function () {
+	    var string0 = this.getAttributeNS(fullname.space, fullname.local);
+	    return string0 === string1 ? null : string0 === string00 ? interpolate0 : interpolate0 = interpolate(string00 = string0, value1);
+	  };
+	}
 
-	        return actionCircularize(entityID, context.projection);
-	    }
+	function attrFunction(name, interpolate, value) {
+	  var string00, string10, interpolate0;
+	  return function () {
+	    var string0,
+	        value1 = value(this),
+	        string1;
+	    if (value1 == null) return void this.removeAttribute(name);
+	    string0 = this.getAttribute(name);
+	    string1 = value1 + "";
+	    return string0 === string1 ? null : string0 === string00 && string1 === string10 ? interpolate0 : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
+	  };
+	}
 
-	    var operation = function() {
-	        if (!_actions.length) { return; }
+	function attrFunctionNS(fullname, interpolate, value) {
+	  var string00, string10, interpolate0;
+	  return function () {
+	    var string0,
+	        value1 = value(this),
+	        string1;
+	    if (value1 == null) return void this.removeAttributeNS(fullname.space, fullname.local);
+	    string0 = this.getAttributeNS(fullname.space, fullname.local);
+	    string1 = value1 + "";
+	    return string0 === string1 ? null : string0 === string00 && string1 === string10 ? interpolate0 : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
+	  };
+	}
 
-	        var combinedAction = function(graph, t) {
-	            _actions.forEach(function(action) {
-	                if (!action.disabled(graph)) {
-	                    graph = action(graph, t);
-	                }
-	            });
-	            return graph;
-	        };
-	        combinedAction.transitionable = true;
+	function transition_attr (name, value) {
+	  var fullname = namespace(name),
+	      i = fullname === "transform" ? interpolateTransformSvg : interpolate;
+	  return this.attrTween(name, typeof value === "function" ? (fullname.local ? attrFunctionNS : attrFunction)(fullname, i, tweenValue(this, "attr." + name, value)) : value == null ? (fullname.local ? attrRemoveNS : attrRemove)(fullname) : (fullname.local ? attrConstantNS : attrConstant)(fullname, i, value));
+	}
 
-	        context.perform(combinedAction, operation.annotation());
+	function attrInterpolate(name, i) {
+	  return function (t) {
+	    this.setAttribute(name, i.call(this, t));
+	  };
+	}
 
-	        window.setTimeout(function() {
-	            context.validator().validate();
-	        }, 300);  // after any transition
-	    };
+	function attrInterpolateNS(fullname, i) {
+	  return function (t) {
+	    this.setAttributeNS(fullname.space, fullname.local, i.call(this, t));
+	  };
+	}
 
+	function attrTweenNS(fullname, value) {
+	  var t0, i0;
 
-	    operation.available = function() {
-	        return _actions.length && selectedIDs.length === _actions.length;
-	    };
+	  function tween() {
+	    var i = value.apply(this, arguments);
+	    if (i !== i0) t0 = (i0 = i) && attrInterpolateNS(fullname, i);
+	    return t0;
+	  }
 
+	  tween._value = value;
+	  return tween;
+	}
 
-	    // don't cache this because the visible extent could change
-	    operation.disabled = function() {
-	        if (!_actions.length) { return ''; }
+	function attrTween(name, value) {
+	  var t0, i0;
 
-	        var actionDisableds = _actions.map(function(action) {
-	            return action.disabled(context.graph());
-	        }).filter(Boolean);
+	  function tween() {
+	    var i = value.apply(this, arguments);
+	    if (i !== i0) t0 = (i0 = i) && attrInterpolate(name, i);
+	    return t0;
+	  }
 
-	        if (actionDisableds.length === _actions.length) {
-	            // none of the features can be circularized
+	  tween._value = value;
+	  return tween;
+	}
 
-	            if (new Set(actionDisableds).size > 1) {
-	                return 'multiple_blockers';
-	            }
-	            return actionDisableds[0];
-	        } else if (_extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        } else if (someMissing()) {
-	            return 'not_downloaded';
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        }
+	function transition_attrTween (name, value) {
+	  var key = "attr." + name;
+	  if (arguments.length < 2) return (key = this.tween(key)) && key._value;
+	  if (value == null) return this.tween(key, null);
+	  if (typeof value !== "function") throw new Error();
+	  var fullname = namespace(name);
+	  return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value));
+	}
 
-	        return false;
+	function delayFunction(id, value) {
+	  return function () {
+	    init(this, id).delay = +value.apply(this, arguments);
+	  };
+	}
 
+	function delayConstant(id, value) {
+	  return value = +value, function () {
+	    init(this, id).delay = value;
+	  };
+	}
 
-	        function someMissing() {
-	            if (context.inIntro()) { return false; }
-	            var osm = context.connection();
-	            if (osm) {
-	                var missing = _coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-	                if (missing.length) {
-	                    missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
-	    };
+	function transition_delay (value) {
+	  var id = this._id;
+	  return arguments.length ? this.each((typeof value === "function" ? delayFunction : delayConstant)(id, value)) : get$1(this.node(), id).delay;
+	}
 
+	function durationFunction(id, value) {
+	  return function () {
+	    set(this, id).duration = +value.apply(this, arguments);
+	  };
+	}
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.circularize.' + disable + '.' + _amount) :
-	            _t('operations.circularize.description.' + _amount);
-	    };
+	function durationConstant(id, value) {
+	  return value = +value, function () {
+	    set(this, id).duration = value;
+	  };
+	}
 
+	function transition_duration (value) {
+	  var id = this._id;
+	  return arguments.length ? this.each((typeof value === "function" ? durationFunction : durationConstant)(id, value)) : get$1(this.node(), id).duration;
+	}
 
-	    operation.annotation = function() {
-	        return _t('operations.circularize.annotation.' + _amount);
-	    };
+	function easeConstant(id, value) {
+	  if (typeof value !== "function") throw new Error();
+	  return function () {
+	    set(this, id).ease = value;
+	  };
+	}
 
+	function transition_ease (value) {
+	  var id = this._id;
+	  return arguments.length ? this.each(easeConstant(id, value)) : get$1(this.node(), id).ease;
+	}
 
-	    operation.id = 'circularize';
-	    operation.keys = [_t('operations.circularize.key')];
-	    operation.title = _t('operations.circularize.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	function easeVarying(id, value) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    if (typeof v !== "function") throw new Error();
+	    set(this, id).ease = v;
+	  };
+	}
 
-	    return operation;
+	function transition_easeVarying (value) {
+	  if (typeof value !== "function") throw new Error();
+	  return this.each(easeVarying(this._id, value));
 	}
 
-	// Translate a MacOS key command into the appropriate Windows/Linux equivalent.
-	// For example, ⌘Z -> Ctrl+Z
-	var uiCmd = function (code) {
-	    var detected = utilDetect();
+	function transition_filter (match) {
+	  if (typeof match !== "function") match = matcher(match);
 
-	    if (detected.os === 'mac') {
-	        return code;
+	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
+	      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
+	        subgroup.push(node);
+	      }
 	    }
+	  }
 
-	    if (detected.os === 'win') {
-	        if (code === '⌘⇧Z') { return 'Ctrl+Y'; }
-	    }
+	  return new Transition(subgroups, this._parents, this._name, this._id);
+	}
 
-	    var result = '',
-	        replacements = {
-	            '⌘': 'Ctrl',
-	            '⇧': 'Shift',
-	            '⌥': 'Alt',
-	            '⌫': 'Backspace',
-	            '⌦': 'Delete'
-	        };
+	function transition_merge (transition) {
+	  if (transition._id !== this._id) throw new Error();
 
-	    for (var i = 0; i < code.length; i++) {
-	        if (code[i] in replacements) {
-	            result += replacements[code[i]] + (i < code.length - 1 ? '+' : '');
-	        } else {
-	            result += code[i];
-	        }
+	  for (var groups0 = this._groups, groups1 = transition._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
+	    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
+	      if (node = group0[i] || group1[i]) {
+	        merge[i] = node;
+	      }
 	    }
+	  }
 
-	    return result;
-	};
+	  for (; j < m0; ++j) {
+	    merges[j] = groups0[j];
+	  }
+
+	  return new Transition(merges, this._parents, this._name, this._id);
+	}
 
+	function start(name) {
+	  return (name + "").trim().split(/^|\s+/).every(function (t) {
+	    var i = t.indexOf(".");
+	    if (i >= 0) t = t.slice(0, i);
+	    return !t || t === "start";
+	  });
+	}
 
-	// return a display-focused string for a given keyboard code
-	uiCmd.display = function(code) {
-	    if (code.length !== 1) { return code; }
+	function onFunction(id, name, listener) {
+	  var on0,
+	      on1,
+	      sit = start(name) ? init : set;
+	  return function () {
+	    var schedule = sit(this, id),
+	        on = schedule.on; // If this node shared a dispatch with the previous node,
+	    // just assign the updated shared dispatch and we’re done!
+	    // Otherwise, copy-on-write.
 
-	    var detected = utilDetect();
-	    var mac = (detected.os === 'mac');
-	    var replacements = {
-	        '⌘': mac ? '⌘ ' + _t('shortcuts.key.cmd')    : _t('shortcuts.key.ctrl'),
-	        '⇧': mac ? '⇧ ' + _t('shortcuts.key.shift')  : _t('shortcuts.key.shift'),
-	        '⌥': mac ? '⌥ ' + _t('shortcuts.key.option') : _t('shortcuts.key.alt'),
-	        '⌃': mac ? '⌃ ' + _t('shortcuts.key.ctrl')   : _t('shortcuts.key.ctrl'),
-	        '⌫': mac ? '⌫ ' + _t('shortcuts.key.delete') : _t('shortcuts.key.backspace'),
-	        '⌦': mac ? '⌦ ' + _t('shortcuts.key.del')    : _t('shortcuts.key.del'),
-	        '↖': mac ? '↖ ' + _t('shortcuts.key.pgup')   : _t('shortcuts.key.pgup'),
-	        '↘': mac ? '↘ ' + _t('shortcuts.key.pgdn')   : _t('shortcuts.key.pgdn'),
-	        '⇞': mac ? '⇞ ' + _t('shortcuts.key.home')   : _t('shortcuts.key.home'),
-	        '⇟': mac ? '⇟ ' + _t('shortcuts.key.end')    : _t('shortcuts.key.end'),
-	        '↵': mac ? '⏎ ' + _t('shortcuts.key.return') : _t('shortcuts.key.enter'),
-	        '⎋': mac ? '⎋ ' + _t('shortcuts.key.esc')    : _t('shortcuts.key.esc'),
-	        '☰': mac ? '☰ ' + _t('shortcuts.key.menu')  : _t('shortcuts.key.menu'),
-	    };
+	    if (on !== on0) (on1 = (on0 = on).copy()).on(name, listener);
+	    schedule.on = on1;
+	  };
+	}
 
-	    return replacements[code] || code;
-	};
+	function transition_on (name, listener) {
+	  var id = this._id;
+	  return arguments.length < 2 ? get$1(this.node(), id).on.on(name) : this.each(onFunction(id, name, listener));
+	}
 
-	function operationDelete(context, selectedIDs) {
-	    var multi = (selectedIDs.length === 1 ? 'single' : 'multiple');
-	    var action = actionDeleteMultiple(selectedIDs);
-	    var nodes = utilGetAllNodes(selectedIDs, context.graph());
-	    var coords = nodes.map(function(n) { return n.loc; });
-	    var extent = utilTotalExtent(selectedIDs, context.graph());
+	function removeFunction(id) {
+	  return function () {
+	    var parent = this.parentNode;
 
+	    for (var i in this.__transition) {
+	      if (+i !== id) return;
+	    }
 
-	    var operation = function() {
-	        var nextSelectedID;
-	        var nextSelectedLoc;
+	    if (parent) parent.removeChild(this);
+	  };
+	}
 
-	        if (selectedIDs.length === 1) {
-	            var id = selectedIDs[0];
-	            var entity = context.entity(id);
-	            var geometry = entity.geometry(context.graph());
-	            var parents = context.graph().parentWays(entity);
-	            var parent = parents[0];
-
-	            // Select the next closest node in the way.
-	            if (geometry === 'vertex') {
-	                var nodes = parent.nodes;
-	                var i = nodes.indexOf(id);
-
-	                if (i === 0) {
-	                    i++;
-	                } else if (i === nodes.length - 1) {
-	                    i--;
-	                } else {
-	                    var a = geoSphericalDistance(entity.loc, context.entity(nodes[i - 1]).loc);
-	                    var b = geoSphericalDistance(entity.loc, context.entity(nodes[i + 1]).loc);
-	                    i = a < b ? i - 1 : i + 1;
-	                }
+	function transition_remove () {
+	  return this.on("end.remove", removeFunction(this._id));
+	}
 
-	                nextSelectedID = nodes[i];
-	                nextSelectedLoc = context.entity(nextSelectedID).loc;
-	            }
-	        }
+	function transition_select (select) {
+	  var name = this._name,
+	      id = this._id;
+	  if (typeof select !== "function") select = selector(select);
 
-	        context.perform(action, operation.annotation());
-	        context.validator().validate();
+	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
+	      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
+	        if ("__data__" in node) subnode.__data__ = node.__data__;
+	        subgroup[i] = subnode;
+	        schedule(subgroup[i], name, id, i, subgroup, get$1(node, id));
+	      }
+	    }
+	  }
 
-	        if (nextSelectedID && nextSelectedLoc) {
-	            if (context.hasEntity(nextSelectedID)) {
-	                context.enter(modeSelect(context, [nextSelectedID]).follow(true));
-	            } else {
-	                context.map().centerEase(nextSelectedLoc);
-	                context.enter(modeBrowse(context));
-	            }
-	        } else {
-	            context.enter(modeBrowse(context));
-	        }
+	  return new Transition(subgroups, this._parents, name, id);
+	}
 
-	    };
+	function transition_selectAll (select) {
+	  var name = this._name,
+	      id = this._id;
+	  if (typeof select !== "function") select = selectorAll(select);
 
+	  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+	      if (node = group[i]) {
+	        for (var children = select.call(node, node.__data__, i, group), child, inherit = get$1(node, id), k = 0, l = children.length; k < l; ++k) {
+	          if (child = children[k]) {
+	            schedule(child, name, id, k, children, inherit);
+	          }
+	        }
 
-	    operation.available = function() {
-	        return true;
-	    };
+	        subgroups.push(children);
+	        parents.push(node);
+	      }
+	    }
+	  }
 
+	  return new Transition(subgroups, parents, name, id);
+	}
 
-	    operation.disabled = function() {
-	        if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        } else if (someMissing()) {
-	            return 'not_downloaded';
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        } else if (selectedIDs.some(protectedMember)) {
-	            return 'part_of_relation';
-	        } else if (selectedIDs.some(incompleteRelation)) {
-	            return 'incomplete_relation';
-	        } else if (selectedIDs.some(hasWikidataTag)) {
-	            return 'has_wikidata_tag';
-	        }
+	var Selection = selection.prototype.constructor;
+	function transition_selection () {
+	  return new Selection(this._groups, this._parents);
+	}
 
-	        return false;
+	function styleNull(name, interpolate) {
+	  var string00, string10, interpolate0;
+	  return function () {
+	    var string0 = styleValue(this, name),
+	        string1 = (this.style.removeProperty(name), styleValue(this, name));
+	    return string0 === string1 ? null : string0 === string00 && string1 === string10 ? interpolate0 : interpolate0 = interpolate(string00 = string0, string10 = string1);
+	  };
+	}
 
+	function styleRemove(name) {
+	  return function () {
+	    this.style.removeProperty(name);
+	  };
+	}
 
-	        function someMissing() {
-	            if (context.inIntro()) { return false; }
-	            var osm = context.connection();
-	            if (osm) {
-	                var missing = coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-	                if (missing.length) {
-	                    missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
+	function styleConstant(name, interpolate, value1) {
+	  var string00,
+	      string1 = value1 + "",
+	      interpolate0;
+	  return function () {
+	    var string0 = styleValue(this, name);
+	    return string0 === string1 ? null : string0 === string00 ? interpolate0 : interpolate0 = interpolate(string00 = string0, value1);
+	  };
+	}
 
-	        function hasWikidataTag(id) {
-	            var entity = context.entity(id);
-	            return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
-	        }
+	function styleFunction(name, interpolate, value) {
+	  var string00, string10, interpolate0;
+	  return function () {
+	    var string0 = styleValue(this, name),
+	        value1 = value(this),
+	        string1 = value1 + "";
+	    if (value1 == null) string1 = value1 = (this.style.removeProperty(name), styleValue(this, name));
+	    return string0 === string1 ? null : string0 === string00 && string1 === string10 ? interpolate0 : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
+	  };
+	}
 
-	        function incompleteRelation(id) {
-	            var entity = context.entity(id);
-	            return entity.type === 'relation' && !entity.isComplete(context.graph());
-	        }
+	function styleMaybeRemove(id, name) {
+	  var on0,
+	      on1,
+	      listener0,
+	      key = "style." + name,
+	      event = "end." + key,
+	      remove;
+	  return function () {
+	    var schedule = set(this, id),
+	        on = schedule.on,
+	        listener = schedule.value[key] == null ? remove || (remove = styleRemove(name)) : undefined; // If this node shared a dispatch with the previous node,
+	    // just assign the updated shared dispatch and we’re done!
+	    // Otherwise, copy-on-write.
 
-	        function protectedMember(id) {
-	            var entity = context.entity(id);
-	            if (entity.type !== 'way') { return false; }
-
-	            var parents = context.graph().parentRelations(entity);
-	            for (var i = 0; i < parents.length; i++) {
-	                var parent = parents[i];
-	                var type = parent.tags.type;
-	                var role = parent.memberById(id).role || 'outer';
-	                if (type === 'route' || type === 'boundary' || (type === 'multipolygon' && role === 'outer')) {
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
-	    };
+	    if (on !== on0 || listener0 !== listener) (on1 = (on0 = on).copy()).on(event, listener0 = listener);
+	    schedule.on = on1;
+	  };
+	}
 
+	function transition_style (name, value, priority) {
+	  var i = (name += "") === "transform" ? interpolateTransformCss : interpolate;
+	  return value == null ? this.styleTween(name, styleNull(name, i)).on("end.style." + name, styleRemove(name)) : typeof value === "function" ? this.styleTween(name, styleFunction(name, i, tweenValue(this, "style." + name, value))).each(styleMaybeRemove(this._id, name)) : this.styleTween(name, styleConstant(name, i, value), priority).on("end.style." + name, null);
+	}
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.delete.' + disable + '.' + multi) :
-	            _t('operations.delete.description' + '.' + multi);
-	    };
+	function styleInterpolate(name, i, priority) {
+	  return function (t) {
+	    this.style.setProperty(name, i.call(this, t), priority);
+	  };
+	}
 
+	function styleTween(name, value, priority) {
+	  var t, i0;
 
-	    operation.annotation = function() {
-	        return selectedIDs.length === 1 ?
-	            _t('operations.delete.annotation.' + context.graph().geometry(selectedIDs[0])) :
-	            _t('operations.delete.annotation.multiple', { n: selectedIDs.length });
-	    };
+	  function tween() {
+	    var i = value.apply(this, arguments);
+	    if (i !== i0) t = (i0 = i) && styleInterpolate(name, i, priority);
+	    return t;
+	  }
 
+	  tween._value = value;
+	  return tween;
+	}
 
-	    operation.id = 'delete';
-	    operation.keys = [uiCmd('⌘⌫'), uiCmd('⌘⌦'), uiCmd('⌦')];
-	    operation.title = _t('operations.delete.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	function transition_styleTween (name, value, priority) {
+	  var key = "style." + (name += "");
+	  if (arguments.length < 2) return (key = this.tween(key)) && key._value;
+	  if (value == null) return this.tween(key, null);
+	  if (typeof value !== "function") throw new Error();
+	  return this.tween(key, styleTween(name, value, priority == null ? "" : priority));
+	}
 
-	    return operation;
+	function textConstant(value) {
+	  return function () {
+	    this.textContent = value;
+	  };
 	}
 
-	function operationOrthogonalize(context, selectedIDs) {
-	    var _extent;
-	    var _type;
-	    var _actions = selectedIDs.map(chooseAction).filter(Boolean);
-	    var _amount = _actions.length === 1 ? 'single' : 'multiple';
-	    var _coords = utilGetAllNodes(selectedIDs, context.graph())
-	        .map(function(n) { return n.loc; });
+	function textFunction(value) {
+	  return function () {
+	    var value1 = value(this);
+	    this.textContent = value1 == null ? "" : value1;
+	  };
+	}
 
+	function transition_text (value) {
+	  return this.tween("text", typeof value === "function" ? textFunction(tweenValue(this, "text", value)) : textConstant(value == null ? "" : value + ""));
+	}
 
-	    function chooseAction(entityID) {
+	function textInterpolate(i) {
+	  return function (t) {
+	    this.textContent = i.call(this, t);
+	  };
+	}
 
-	        var entity = context.entity(entityID);
-	        var geometry = entity.geometry(context.graph());
+	function textTween(value) {
+	  var t0, i0;
 
-	        if (!_extent) {
-	            _extent =  entity.extent(context.graph());
-	        } else {
-	            _extent = _extent.extend(entity.extent(context.graph()));
-	        }
-
-	        // square a line/area
-	        if (entity.type === 'way' && new Set(entity.nodes).size > 2 ) {
-	            if (_type && _type !== 'feature') { return null; }
-	            _type = 'feature';
-	            return actionOrthogonalize(entityID, context.projection);
-
-	        // square a single vertex
-	        } else if (geometry === 'vertex') {
-	            if (_type && _type !== 'corner') { return null; }
-	            _type = 'corner';
-	            var graph = context.graph();
-	            var parents = graph.parentWays(entity);
-	            if (parents.length === 1) {
-	                var way = parents[0];
-	                if (way.nodes.indexOf(entityID) !== -1) {
-	                    return actionOrthogonalize(way.id, context.projection, entityID);
-	                }
-	            }
-	        }
+	  function tween() {
+	    var i = value.apply(this, arguments);
+	    if (i !== i0) t0 = (i0 = i) && textInterpolate(i);
+	    return t0;
+	  }
 
-	        return null;
-	    }
+	  tween._value = value;
+	  return tween;
+	}
 
+	function transition_textTween (value) {
+	  var key = "text";
+	  if (arguments.length < 1) return (key = this.tween(key)) && key._value;
+	  if (value == null) return this.tween(key, null);
+	  if (typeof value !== "function") throw new Error();
+	  return this.tween(key, textTween(value));
+	}
 
-	    var operation = function() {
-	        if (!_actions.length) { return; }
+	function transition_transition () {
+	  var name = this._name,
+	      id0 = this._id,
+	      id1 = newId();
 
-	        var combinedAction = function(graph, t) {
-	            _actions.forEach(function(action) {
-	                if (!action.disabled(graph)) {
-	                    graph = action(graph, t);
-	                }
-	            });
-	            return graph;
-	        };
-	        combinedAction.transitionable = true;
+	  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+	      if (node = group[i]) {
+	        var inherit = get$1(node, id0);
+	        schedule(node, name, id1, i, group, {
+	          time: inherit.time + inherit.delay + inherit.duration,
+	          delay: 0,
+	          duration: inherit.duration,
+	          ease: inherit.ease
+	        });
+	      }
+	    }
+	  }
 
-	        context.perform(combinedAction, operation.annotation());
+	  return new Transition(groups, this._parents, name, id1);
+	}
 
-	        window.setTimeout(function() {
-	            context.validator().validate();
-	        }, 300);  // after any transition
+	function transition_end () {
+	  var on0,
+	      on1,
+	      that = this,
+	      id = that._id,
+	      size = that.size();
+	  return new Promise(function (resolve, reject) {
+	    var cancel = {
+	      value: reject
+	    },
+	        end = {
+	      value: function value() {
+	        if (--size === 0) resolve();
+	      }
 	    };
+	    that.each(function () {
+	      var schedule = set(this, id),
+	          on = schedule.on; // If this node shared a dispatch with the previous node,
+	      // just assign the updated shared dispatch and we’re done!
+	      // Otherwise, copy-on-write.
 
+	      if (on !== on0) {
+	        on1 = (on0 = on).copy();
 
-	    operation.available = function() {
-	        return _actions.length && selectedIDs.length === _actions.length;
-	    };
+	        on1._.cancel.push(cancel);
 
+	        on1._.interrupt.push(cancel);
 
-	    // don't cache this because the visible extent could change
-	    operation.disabled = function() {
-	        if (!_actions.length) { return ''; }
+	        on1._.end.push(end);
+	      }
 
-	        var actionDisableds = _actions.map(function(action) {
-	            return action.disabled(context.graph());
-	        }).filter(Boolean);
+	      schedule.on = on1;
+	    }); // The selection was empty, resolve end immediately
 
-	        if (actionDisableds.length === _actions.length) {
-	            // none of the features can be squared
+	    if (size === 0) resolve();
+	  });
+	}
 
-	            if (new Set(actionDisableds).size > 1) {
-	                return 'multiple_blockers';
-	            }
-	            return actionDisableds[0];
-	        } else if (_extent &&
-	                   _extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        } else if (someMissing()) {
-	            return 'not_downloaded';
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        }
+	var id = 0;
+	function Transition(groups, parents, name, id) {
+	  this._groups = groups;
+	  this._parents = parents;
+	  this._name = name;
+	  this._id = id;
+	}
+	function newId() {
+	  return ++id;
+	}
+	var selection_prototype = selection.prototype;
+	Transition.prototype = _defineProperty({
+	  constructor: Transition,
+	  select: transition_select,
+	  selectAll: transition_selectAll,
+	  filter: transition_filter,
+	  merge: transition_merge,
+	  selection: transition_selection,
+	  transition: transition_transition,
+	  call: selection_prototype.call,
+	  nodes: selection_prototype.nodes,
+	  node: selection_prototype.node,
+	  size: selection_prototype.size,
+	  empty: selection_prototype.empty,
+	  each: selection_prototype.each,
+	  on: transition_on,
+	  attr: transition_attr,
+	  attrTween: transition_attrTween,
+	  style: transition_style,
+	  styleTween: transition_styleTween,
+	  text: transition_text,
+	  textTween: transition_textTween,
+	  remove: transition_remove,
+	  tween: transition_tween,
+	  delay: transition_delay,
+	  duration: transition_duration,
+	  ease: transition_ease,
+	  easeVarying: transition_easeVarying,
+	  end: transition_end
+	}, Symbol.iterator, selection_prototype[Symbol.iterator]);
 
-	        return false;
+	var linear$1 = function linear(t) {
+	  return +t;
+	};
 
+	function cubicInOut(t) {
+	  return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;
+	}
 
-	        function someMissing() {
-	            if (context.inIntro()) { return false; }
-	            var osm = context.connection();
-	            if (osm) {
-	                var missing = _coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-	                if (missing.length) {
-	                    missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
-	    };
+	var defaultTiming = {
+	  time: null,
+	  // Set on use.
+	  delay: 0,
+	  duration: 250,
+	  ease: cubicInOut
+	};
 
+	function inherit(node, id) {
+	  var timing;
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.orthogonalize.' + disable + '.' + _amount) :
-	            _t('operations.orthogonalize.description.' + _type + '.' + _amount);
-	    };
+	  while (!(timing = node.__transition) || !(timing = timing[id])) {
+	    if (!(node = node.parentNode)) {
+	      throw new Error("transition ".concat(id, " not found"));
+	    }
+	  }
 
+	  return timing;
+	}
 
-	    operation.annotation = function() {
-	        return _t('operations.orthogonalize.annotation.' + _type + '.' + _amount);
-	    };
+	function selection_transition (name) {
+	  var id, timing;
 
+	  if (name instanceof Transition) {
+	    id = name._id, name = name._name;
+	  } else {
+	    id = newId(), (timing = defaultTiming).time = now$1(), name = name == null ? null : name + "";
+	  }
 
-	    operation.id = 'orthogonalize';
-	    operation.keys = [_t('operations.orthogonalize.key')];
-	    operation.title = _t('operations.orthogonalize.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+	      if (node = group[i]) {
+	        schedule(node, name, id, i, group, timing || inherit(node, id));
+	      }
+	    }
+	  }
 
-	    return operation;
+	  return new Transition(groups, this._parents, name, id);
 	}
 
-	function operationReflectShort(context, selectedIDs) {
-	    return operationReflect(context, selectedIDs, 'short');
-	}
+	selection.prototype.interrupt = selection_interrupt;
+	selection.prototype.transition = selection_transition;
 
+	var constant = (function (x) {
+	  return function () {
+	    return x;
+	  };
+	});
 
-	function operationReflectLong(context, selectedIDs) {
-	    return operationReflect(context, selectedIDs, 'long');
+	function ZoomEvent(type, _ref) {
+	  var sourceEvent = _ref.sourceEvent,
+	      target = _ref.target,
+	      transform = _ref.transform,
+	      dispatch = _ref.dispatch;
+	  Object.defineProperties(this, {
+	    type: {
+	      value: type,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    sourceEvent: {
+	      value: sourceEvent,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    target: {
+	      value: target,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    transform: {
+	      value: transform,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    _: {
+	      value: dispatch
+	    }
+	  });
 	}
 
+	function Transform(k, x, y) {
+	  this.k = k;
+	  this.x = x;
+	  this.y = y;
+	}
+	Transform.prototype = {
+	  constructor: Transform,
+	  scale: function scale(k) {
+	    return k === 1 ? this : new Transform(this.k * k, this.x, this.y);
+	  },
+	  translate: function translate(x, y) {
+	    return x === 0 & y === 0 ? this : new Transform(this.k, this.x + this.k * x, this.y + this.k * y);
+	  },
+	  apply: function apply(point) {
+	    return [point[0] * this.k + this.x, point[1] * this.k + this.y];
+	  },
+	  applyX: function applyX(x) {
+	    return x * this.k + this.x;
+	  },
+	  applyY: function applyY(y) {
+	    return y * this.k + this.y;
+	  },
+	  invert: function invert(location) {
+	    return [(location[0] - this.x) / this.k, (location[1] - this.y) / this.k];
+	  },
+	  invertX: function invertX(x) {
+	    return (x - this.x) / this.k;
+	  },
+	  invertY: function invertY(y) {
+	    return (y - this.y) / this.k;
+	  },
+	  rescaleX: function rescaleX(x) {
+	    return x.copy().domain(x.range().map(this.invertX, this).map(x.invert, x));
+	  },
+	  rescaleY: function rescaleY(y) {
+	    return y.copy().domain(y.range().map(this.invertY, this).map(y.invert, y));
+	  },
+	  toString: function toString() {
+	    return "translate(" + this.x + "," + this.y + ") scale(" + this.k + ")";
+	  }
+	};
+	var identity$2 = new Transform(1, 0, 0);
 
-	function operationReflect(context, selectedIDs, axis) {
-	    axis = axis || 'long';
-	    var multi = (selectedIDs.length === 1 ? 'single' : 'multiple');
-	    var nodes = utilGetAllNodes(selectedIDs, context.graph());
-	    var coords = nodes.map(function(n) { return n.loc; });
-	    var extent = utilTotalExtent(selectedIDs, context.graph());
-
+	function nopropagation(event) {
+	  event.stopImmediatePropagation();
+	}
+	function noevent (event) {
+	  event.preventDefault();
+	  event.stopImmediatePropagation();
+	}
 
-	    var operation = function() {
-	        var action = actionReflect(selectedIDs, context.projection)
-	            .useLongAxis(Boolean(axis === 'long'));
+	// except for pinch-to-zoom, which is sent as a wheel+ctrlKey event
 
-	        context.perform(action, operation.annotation());
+	function defaultFilter$1(event) {
+	  return (!event.ctrlKey || event.type === 'wheel') && !event.button;
+	}
 
-	        window.setTimeout(function() {
-	            context.validator().validate();
-	        }, 300);  // after any transition
-	    };
+	function defaultExtent$1() {
+	  var e = this;
 
+	  if (e instanceof SVGElement) {
+	    e = e.ownerSVGElement || e;
 
-	    operation.available = function() {
-	        return nodes.length >= 3;
-	    };
+	    if (e.hasAttribute("viewBox")) {
+	      e = e.viewBox.baseVal;
+	      return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
+	    }
 
+	    return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
+	  }
 
-	    // don't cache this because the visible extent could change
-	    operation.disabled = function() {
-	        if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        } else if (someMissing()) {
-	            return 'not_downloaded';
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        } else if (selectedIDs.some(incompleteRelation)) {
-	            return 'incomplete_relation';
-	        }
+	  return [[0, 0], [e.clientWidth, e.clientHeight]];
+	}
 
-	        return false;
+	function defaultTransform() {
+	  return this.__zoom || identity$2;
+	}
 
+	function defaultWheelDelta$1(event) {
+	  return -event.deltaY * (event.deltaMode === 1 ? 0.05 : event.deltaMode ? 1 : 0.002) * (event.ctrlKey ? 10 : 1);
+	}
 
-	        function someMissing() {
-	            if (context.inIntro()) { return false; }
-	            var osm = context.connection();
-	            if (osm) {
-	                var missing = coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-	                if (missing.length) {
-	                    missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
+	function defaultTouchable() {
+	  return navigator.maxTouchPoints || "ontouchstart" in this;
+	}
 
-	        function incompleteRelation(id) {
-	            var entity = context.entity(id);
-	            return entity.type === 'relation' && !entity.isComplete(context.graph());
-	        }
-	    };
+	function defaultConstrain$1(transform, extent, translateExtent) {
+	  var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],
+	      dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],
+	      dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],
+	      dy1 = transform.invertY(extent[1][1]) - translateExtent[1][1];
+	  return transform.translate(dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1), dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1));
+	}
 
+	function d3_zoom () {
+	  var filter = defaultFilter$1,
+	      extent = defaultExtent$1,
+	      constrain = defaultConstrain$1,
+	      wheelDelta = defaultWheelDelta$1,
+	      touchable = defaultTouchable,
+	      scaleExtent = [0, Infinity],
+	      translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
+	      duration = 250,
+	      interpolate = interpolateZoom,
+	      listeners = dispatch$8("start", "zoom", "end"),
+	      touchstarting,
+	      touchfirst,
+	      touchending,
+	      touchDelay = 500,
+	      wheelDelay = 150,
+	      clickDistance2 = 0,
+	      tapDistance = 10;
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.reflect.' + disable + '.' + multi) :
-	            _t('operations.reflect.description.' + axis + '.' + multi);
-	    };
+	  function zoom(selection) {
+	    selection.property("__zoom", defaultTransform).on("wheel.zoom", wheeled).on("mousedown.zoom", mousedowned).on("dblclick.zoom", dblclicked).filter(touchable).on("touchstart.zoom", touchstarted).on("touchmove.zoom", touchmoved).on("touchend.zoom touchcancel.zoom", touchended).style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
+	  }
 
+	  zoom.transform = function (collection, transform, point, event) {
+	    var selection = collection.selection ? collection.selection() : collection;
+	    selection.property("__zoom", defaultTransform);
 
-	    operation.annotation = function() {
-	        return _t('operations.reflect.annotation.' + axis + '.' + multi);
-	    };
+	    if (collection !== selection) {
+	      schedule(collection, transform, point, event);
+	    } else {
+	      selection.interrupt().each(function () {
+	        gesture(this, arguments).event(event).start().zoom(null, typeof transform === "function" ? transform.apply(this, arguments) : transform).end();
+	      });
+	    }
+	  };
 
+	  zoom.scaleBy = function (selection, k, p, event) {
+	    zoom.scaleTo(selection, function () {
+	      var k0 = this.__zoom.k,
+	          k1 = typeof k === "function" ? k.apply(this, arguments) : k;
+	      return k0 * k1;
+	    }, p, event);
+	  };
 
-	    operation.id = 'reflect-' + axis;
-	    operation.keys = [_t('operations.reflect.key.' + axis)];
-	    operation.title = _t('operations.reflect.title.' + axis);
-	    operation.behavior = behaviorOperation(context).which(operation);
+	  zoom.scaleTo = function (selection, k, p, event) {
+	    zoom.transform(selection, function () {
+	      var e = extent.apply(this, arguments),
+	          t0 = this.__zoom,
+	          p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p,
+	          p1 = t0.invert(p0),
+	          k1 = typeof k === "function" ? k.apply(this, arguments) : k;
+	      return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);
+	    }, p, event);
+	  };
 
-	    return operation;
-	}
+	  zoom.translateBy = function (selection, x, y, event) {
+	    zoom.transform(selection, function () {
+	      return constrain(this.__zoom.translate(typeof x === "function" ? x.apply(this, arguments) : x, typeof y === "function" ? y.apply(this, arguments) : y), extent.apply(this, arguments), translateExtent);
+	    }, null, event);
+	  };
 
-	function operationMove(context, selectedIDs) {
-	    var multi = (selectedIDs.length === 1 ? 'single' : 'multiple');
-	    var nodes = utilGetAllNodes(selectedIDs, context.graph());
-	    var coords = nodes.map(function(n) { return n.loc; });
-	    var extent = utilTotalExtent(selectedIDs, context.graph());
+	  zoom.translateTo = function (selection, x, y, p, event) {
+	    zoom.transform(selection, function () {
+	      var e = extent.apply(this, arguments),
+	          t = this.__zoom,
+	          p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p;
+	      return constrain(identity$2.translate(p0[0], p0[1]).scale(t.k).translate(typeof x === "function" ? -x.apply(this, arguments) : -x, typeof y === "function" ? -y.apply(this, arguments) : -y), e, translateExtent);
+	    }, p, event);
+	  };
 
+	  function scale(transform, k) {
+	    k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], k));
+	    return k === transform.k ? transform : new Transform(k, transform.x, transform.y);
+	  }
 
-	    var operation = function() {
-	        context.enter(modeMove(context, selectedIDs));
-	    };
+	  function translate(transform, p0, p1) {
+	    var x = p0[0] - p1[0] * transform.k,
+	        y = p0[1] - p1[1] * transform.k;
+	    return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
+	  }
 
+	  function centroid(extent) {
+	    return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
+	  }
 
-	    operation.available = function() {
-	        return selectedIDs.length > 1 ||
-	            context.entity(selectedIDs[0]).type !== 'node';
-	    };
+	  function schedule(transition, transform, point, event) {
+	    transition.on("start.zoom", function () {
+	      gesture(this, arguments).event(event).start();
+	    }).on("interrupt.zoom end.zoom", function () {
+	      gesture(this, arguments).event(event).end();
+	    }).tween("zoom", function () {
+	      var that = this,
+	          args = arguments,
+	          g = gesture(that, args).event(event),
+	          e = extent.apply(that, args),
+	          p = point == null ? centroid(e) : typeof point === "function" ? point.apply(that, args) : point,
+	          w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
+	          a = that.__zoom,
+	          b = typeof transform === "function" ? transform.apply(that, args) : transform,
+	          i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
+	      return function (t) {
+	        if (t === 1) t = b; // Avoid rounding error on end.
+	        else {
+	            var l = i(t),
+	                k = w / l[2];
+	            t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k);
+	          }
+	        g.zoom(null, t);
+	      };
+	    });
+	  }
 
+	  function gesture(that, args, clean) {
+	    return !clean && that.__zooming || new Gesture(that, args);
+	  }
 
-	    operation.disabled = function() {
-	        if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        } else if (someMissing()) {
-	            return 'not_downloaded';
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        } else if (selectedIDs.some(incompleteRelation)) {
-	            return 'incomplete_relation';
-	        }
+	  function Gesture(that, args) {
+	    this.that = that;
+	    this.args = args;
+	    this.active = 0;
+	    this.sourceEvent = null;
+	    this.extent = extent.apply(that, args);
+	    this.taps = 0;
+	  }
 
-	        return false;
+	  Gesture.prototype = {
+	    event: function event(_event) {
+	      if (_event) this.sourceEvent = _event;
+	      return this;
+	    },
+	    start: function start() {
+	      if (++this.active === 1) {
+	        this.that.__zooming = this;
+	        this.emit("start");
+	      }
 
+	      return this;
+	    },
+	    zoom: function zoom(key, transform) {
+	      if (this.mouse && key !== "mouse") this.mouse[1] = transform.invert(this.mouse[0]);
+	      if (this.touch0 && key !== "touch") this.touch0[1] = transform.invert(this.touch0[0]);
+	      if (this.touch1 && key !== "touch") this.touch1[1] = transform.invert(this.touch1[0]);
+	      this.that.__zoom = transform;
+	      this.emit("zoom");
+	      return this;
+	    },
+	    end: function end() {
+	      if (--this.active === 0) {
+	        delete this.that.__zooming;
+	        this.emit("end");
+	      }
 
-	        function someMissing() {
-	            if (context.inIntro()) { return false; }
-	            var osm = context.connection();
-	            if (osm) {
-	                var missing = coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-	                if (missing.length) {
-	                    missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
+	      return this;
+	    },
+	    emit: function emit(type) {
+	      var d = select(this.that).datum();
+	      listeners.call(type, this.that, new ZoomEvent(type, {
+	        sourceEvent: this.sourceEvent,
+	        target: zoom,
+	        type: type,
+	        transform: this.that.__zoom,
+	        dispatch: listeners
+	      }), d);
+	    }
+	  };
 
-	        function incompleteRelation(id) {
-	            var entity = context.entity(id);
-	            return entity.type === 'relation' && !entity.isComplete(context.graph());
-	        }
-	    };
+	  function wheeled(event) {
+	    for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+	      args[_key - 1] = arguments[_key];
+	    }
 
+	    if (!filter.apply(this, arguments)) return;
+	    var g = gesture(this, args).event(event),
+	        t = this.__zoom,
+	        k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], t.k * Math.pow(2, wheelDelta.apply(this, arguments)))),
+	        p = pointer(event); // If the mouse is in the same location as before, reuse it.
+	    // If there were recent wheel events, reset the wheel idle timeout.
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.move.' + disable + '.' + multi) :
-	            _t('operations.move.description.' + multi);
-	    };
+	    if (g.wheel) {
+	      if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
+	        g.mouse[1] = t.invert(g.mouse[0] = p);
+	      }
 
+	      clearTimeout(g.wheel);
+	    } // If this wheel event won’t trigger a transform change, ignore it.
+	    else if (t.k === k) return; // Otherwise, capture the mouse point and location at the start.
+	      else {
+	          g.mouse = [p, t.invert(p)];
+	          interrupt(this);
+	          g.start();
+	        }
 
-	    operation.annotation = function() {
-	        return selectedIDs.length === 1 ?
-	            _t('operations.move.annotation.' + context.graph().geometry(selectedIDs[0])) :
-	            _t('operations.move.annotation.multiple');
-	    };
+	    noevent(event);
+	    g.wheel = setTimeout(wheelidled, wheelDelay);
+	    g.zoom("mouse", constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));
 
+	    function wheelidled() {
+	      g.wheel = null;
+	      g.end();
+	    }
+	  }
 
-	    operation.id = 'move';
-	    operation.keys = [_t('operations.move.key')];
-	    operation.title = _t('operations.move.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	  function mousedowned(event) {
+	    for (var _len2 = arguments.length, args = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
+	      args[_key2 - 1] = arguments[_key2];
+	    }
 
-	    operation.mouseOnly = true;
+	    if (touchending || !filter.apply(this, arguments)) return;
+	    var g = gesture(this, args, true).event(event),
+	        v = select(event.view).on("mousemove.zoom", mousemoved, true).on("mouseup.zoom", mouseupped, true),
+	        p = pointer(event, currentTarget),
+	        currentTarget = event.currentTarget,
+	        x0 = event.clientX,
+	        y0 = event.clientY;
+	    dragDisable(event.view);
+	    nopropagation(event);
+	    g.mouse = [p, this.__zoom.invert(p)];
+	    interrupt(this);
+	    g.start();
 
-	    return operation;
-	}
+	    function mousemoved(event) {
+	      noevent(event);
 
-	function modeRotate(context, entityIDs) {
-	    var mode = {
-	        id: 'rotate',
-	        button: 'browse'
-	    };
+	      if (!g.moved) {
+	        var dx = event.clientX - x0,
+	            dy = event.clientY - y0;
+	        g.moved = dx * dx + dy * dy > clickDistance2;
+	      }
 
-	    var keybinding = utilKeybinding('rotate');
-	    var behaviors = [
-	        behaviorEdit(context),
-	        operationCircularize(context, entityIDs).behavior,
-	        operationDelete(context, entityIDs).behavior,
-	        operationMove(context, entityIDs).behavior,
-	        operationOrthogonalize(context, entityIDs).behavior,
-	        operationReflectLong(context, entityIDs).behavior,
-	        operationReflectShort(context, entityIDs).behavior
-	    ];
-	    var annotation = entityIDs.length === 1 ?
-	        _t('operations.rotate.annotation.' + context.graph().geometry(entityIDs[0])) :
-	        _t('operations.rotate.annotation.multiple');
+	      g.event(event).zoom("mouse", constrain(translate(g.that.__zoom, g.mouse[0] = pointer(event, currentTarget), g.mouse[1]), g.extent, translateExtent));
+	    }
 
-	    var _prevGraph;
-	    var _prevAngle;
-	    var _prevTransform;
-	    var _pivot;
+	    function mouseupped(event) {
+	      v.on("mousemove.zoom mouseup.zoom", null);
+	      yesdrag(event.view, g.moved);
+	      noevent(event);
+	      g.event(event).end();
+	    }
+	  }
 
+	  function dblclicked(event) {
+	    for (var _len3 = arguments.length, args = new Array(_len3 > 1 ? _len3 - 1 : 0), _key3 = 1; _key3 < _len3; _key3++) {
+	      args[_key3 - 1] = arguments[_key3];
+	    }
 
-	    function doRotate() {
-	        var fn;
-	        if (context.graph() !== _prevGraph) {
-	            fn = context.perform;
-	        } else {
-	            fn = context.replace;
-	        }
+	    if (!filter.apply(this, arguments)) return;
+	    var t0 = this.__zoom,
+	        p0 = pointer(event.changedTouches ? event.changedTouches[0] : event, this),
+	        p1 = t0.invert(p0),
+	        k1 = t0.k * (event.shiftKey ? 0.5 : 2),
+	        t1 = constrain(translate(scale(t0, k1), p0, p1), extent.apply(this, args), translateExtent);
+	    noevent(event);
+	    if (duration > 0) select(this).transition().duration(duration).call(schedule, t1, p0, event);else select(this).call(zoom.transform, t1, p0, event);
+	  }
 
-	        // projection changed, recalculate _pivot
-	        var projection = context.projection;
-	        var currTransform = projection.transform();
-	        if (!_prevTransform ||
-	            currTransform.k !== _prevTransform.k ||
-	            currTransform.x !== _prevTransform.x ||
-	            currTransform.y !== _prevTransform.y) {
+	  function touchstarted(event) {
+	    for (var _len4 = arguments.length, args = new Array(_len4 > 1 ? _len4 - 1 : 0), _key4 = 1; _key4 < _len4; _key4++) {
+	      args[_key4 - 1] = arguments[_key4];
+	    }
 
-	            var nodes = utilGetAllNodes(entityIDs, context.graph());
-	            var points = nodes.map(function(n) { return projection(n.loc); });
-	            _pivot = getPivot(points);
-	            _prevAngle = undefined;
-	        }
+	    if (!filter.apply(this, arguments)) return;
+	    var touches = event.touches,
+	        n = touches.length,
+	        g = gesture(this, args, event.changedTouches.length === n).event(event),
+	        started,
+	        i,
+	        t,
+	        p;
+	    nopropagation(event);
 
+	    for (i = 0; i < n; ++i) {
+	      t = touches[i], p = pointer(t, this);
+	      p = [p, this.__zoom.invert(p), t.identifier];
+	      if (!g.touch0) g.touch0 = p, started = true, g.taps = 1 + !!touchstarting;else if (!g.touch1 && g.touch0[2] !== p[2]) g.touch1 = p, g.taps = 0;
+	    }
 
-	        var currMouse = context.map().mouse();
-	        var currAngle = Math.atan2(currMouse[1] - _pivot[1], currMouse[0] - _pivot[0]);
+	    if (touchstarting) touchstarting = clearTimeout(touchstarting);
 
-	        if (typeof _prevAngle === 'undefined') { _prevAngle = currAngle; }
-	        var delta = currAngle - _prevAngle;
+	    if (started) {
+	      if (g.taps < 2) touchfirst = p[0], touchstarting = setTimeout(function () {
+	        touchstarting = null;
+	      }, touchDelay);
+	      interrupt(this);
+	      g.start();
+	    }
+	  }
 
-	        fn(actionRotate(entityIDs, _pivot, delta, projection));
+	  function touchmoved(event) {
+	    if (!this.__zooming) return;
 
-	        _prevTransform = currTransform;
-	        _prevAngle = currAngle;
-	        _prevGraph = context.graph();
+	    for (var _len5 = arguments.length, args = new Array(_len5 > 1 ? _len5 - 1 : 0), _key5 = 1; _key5 < _len5; _key5++) {
+	      args[_key5 - 1] = arguments[_key5];
 	    }
 
-	    function getPivot(points) {
-	        var _pivot;
-	        if (points.length === 1) {
-	            _pivot = points[0];
-	        } else if (points.length === 2) {
-	            _pivot = geoVecInterp(points[0], points[1], 0.5);
-	        } else {
-	            var polygonHull = d3_polygonHull(points);
-	            if (polygonHull.length === 2) {
-	                _pivot = geoVecInterp(points[0], points[1], 0.5);
-	            } else {
-	                _pivot = d3_polygonCentroid(d3_polygonHull(points));
-	            }
-	        }
-	        return _pivot;
+	    var g = gesture(this, args).event(event),
+	        touches = event.changedTouches,
+	        n = touches.length,
+	        i,
+	        t,
+	        p,
+	        l;
+	    noevent(event);
+
+	    for (i = 0; i < n; ++i) {
+	      t = touches[i], p = pointer(t, this);
+	      if (g.touch0 && g.touch0[2] === t.identifier) g.touch0[0] = p;else if (g.touch1 && g.touch1[2] === t.identifier) g.touch1[0] = p;
 	    }
 
+	    t = g.that.__zoom;
 
-	    function finish() {
-	        event.stopPropagation();
-	        context.replace(actionNoop(), annotation);
-	        context.enter(modeSelect(context, entityIDs));
-	    }
+	    if (g.touch1) {
+	      var p0 = g.touch0[0],
+	          l0 = g.touch0[1],
+	          p1 = g.touch1[0],
+	          l1 = g.touch1[1],
+	          dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
+	          dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
+	      t = scale(t, Math.sqrt(dp / dl));
+	      p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
+	      l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
+	    } else if (g.touch0) p = g.touch0[0], l = g.touch0[1];else return;
 
+	    g.zoom("touch", constrain(translate(t, p, l), g.extent, translateExtent));
+	  }
 
-	    function cancel() {
-	        context.pop();
-	        context.enter(modeSelect(context, entityIDs));
+	  function touchended(event) {
+	    for (var _len6 = arguments.length, args = new Array(_len6 > 1 ? _len6 - 1 : 0), _key6 = 1; _key6 < _len6; _key6++) {
+	      args[_key6 - 1] = arguments[_key6];
 	    }
 
+	    if (!this.__zooming) return;
+	    var g = gesture(this, args).event(event),
+	        touches = event.changedTouches,
+	        n = touches.length,
+	        i,
+	        t;
+	    nopropagation(event);
+	    if (touchending) clearTimeout(touchending);
+	    touchending = setTimeout(function () {
+	      touchending = null;
+	    }, touchDelay);
 
-	    function undone() {
-	        context.enter(modeBrowse(context));
+	    for (i = 0; i < n; ++i) {
+	      t = touches[i];
+	      if (g.touch0 && g.touch0[2] === t.identifier) delete g.touch0;else if (g.touch1 && g.touch1[2] === t.identifier) delete g.touch1;
 	    }
 
+	    if (g.touch1 && !g.touch0) g.touch0 = g.touch1, delete g.touch1;
+	    if (g.touch0) g.touch0[1] = this.__zoom.invert(g.touch0[0]);else {
+	      g.end(); // If this was a dbltap, reroute to the (optional) dblclick.zoom handler.
 
-	    mode.enter = function() {
-	        context.features().forceVisible(entityIDs);
-
-	        behaviors.forEach(context.install);
+	      if (g.taps === 2) {
+	        t = pointer(t, this);
 
-	        context.surface()
-	            .on('mousemove.rotate', doRotate)
-	            .on('click.rotate', finish);
+	        if (Math.hypot(touchfirst[0] - t[0], touchfirst[1] - t[1]) < tapDistance) {
+	          var p = select(this).on("dblclick.zoom");
+	          if (p) p.apply(this, arguments);
+	        }
+	      }
+	    }
+	  }
 
-	        context.history()
-	            .on('undone.rotate', undone);
+	  zoom.wheelDelta = function (_) {
+	    return arguments.length ? (wheelDelta = typeof _ === "function" ? _ : constant(+_), zoom) : wheelDelta;
+	  };
 
-	        keybinding
-	            .on('⎋', cancel)
-	            .on('↩', finish);
+	  zoom.filter = function (_) {
+	    return arguments.length ? (filter = typeof _ === "function" ? _ : constant(!!_), zoom) : filter;
+	  };
 
-	        select(document)
-	            .call(keybinding);
-	    };
+	  zoom.touchable = function (_) {
+	    return arguments.length ? (touchable = typeof _ === "function" ? _ : constant(!!_), zoom) : touchable;
+	  };
 
+	  zoom.extent = function (_) {
+	    return arguments.length ? (extent = typeof _ === "function" ? _ : constant([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
+	  };
 
-	    mode.exit = function() {
-	        behaviors.forEach(context.uninstall);
+	  zoom.scaleExtent = function (_) {
+	    return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
+	  };
 
-	        context.surface()
-	            .on('mousemove.rotate', null)
-	            .on('click.rotate', null);
+	  zoom.translateExtent = function (_) {
+	    return arguments.length ? (translateExtent[0][0] = +_[0][0], translateExtent[1][0] = +_[1][0], translateExtent[0][1] = +_[0][1], translateExtent[1][1] = +_[1][1], zoom) : [[translateExtent[0][0], translateExtent[0][1]], [translateExtent[1][0], translateExtent[1][1]]];
+	  };
 
-	        context.history()
-	            .on('undone.rotate', null);
+	  zoom.constrain = function (_) {
+	    return arguments.length ? (constrain = _, zoom) : constrain;
+	  };
 
-	        select(document)
-	            .call(keybinding.unbind);
+	  zoom.duration = function (_) {
+	    return arguments.length ? (duration = +_, zoom) : duration;
+	  };
 
-	        context.features().forceVisible([]);
-	    };
+	  zoom.interpolate = function (_) {
+	    return arguments.length ? (interpolate = _, zoom) : interpolate;
+	  };
 
+	  zoom.on = function () {
+	    var value = listeners.on.apply(listeners, arguments);
+	    return value === listeners ? zoom : value;
+	  };
 
-	    mode.selectedIDs = function() {
-	        if (!arguments.length) { return entityIDs; }
-	        // no assign
-	        return mode;
-	    };
+	  zoom.clickDistance = function (_) {
+	    return arguments.length ? (clickDistance2 = (_ = +_) * _, zoom) : Math.sqrt(clickDistance2);
+	  };
 
+	  zoom.tapDistance = function (_) {
+	    return arguments.length ? (tapDistance = +_, zoom) : tapDistance;
+	  };
 
-	    return mode;
+	  return zoom;
 	}
 
-	function operationRotate(context, selectedIDs) {
-	    var multi = (selectedIDs.length === 1 ? 'single' : 'multiple');
-	    var nodes = utilGetAllNodes(selectedIDs, context.graph());
-	    var coords = nodes.map(function(n) { return n.loc; });
-	    var extent = utilTotalExtent(selectedIDs, context.graph());
+	/*
+	    Bypasses features of D3's default projection stream pipeline that are unnecessary:
+	    * Antimeridian clipping
+	    * Spherical rotation
+	    * Resampling
+	*/
 
+	function geoRawMercator() {
+	  var project = mercatorRaw;
+	  var k = 512 / Math.PI; // scale
 
-	    var operation = function() {
-	        context.enter(modeRotate(context, selectedIDs));
-	    };
+	  var x = 0;
+	  var y = 0; // translate
 
+	  var clipExtent = [[0, 0], [0, 0]];
 
-	    operation.available = function() {
-	        return nodes.length >= 2;
-	    };
+	  function projection(point) {
+	    point = project(point[0] * Math.PI / 180, point[1] * Math.PI / 180);
+	    return [point[0] * k + x, y - point[1] * k];
+	  }
 
+	  projection.invert = function (point) {
+	    point = project.invert((point[0] - x) / k, (y - point[1]) / k);
+	    return point && [point[0] * 180 / Math.PI, point[1] * 180 / Math.PI];
+	  };
 
-	    operation.disabled = function() {
+	  projection.scale = function (_) {
+	    if (!arguments.length) return k;
+	    k = +_;
+	    return projection;
+	  };
 
-	        if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        } else if (someMissing()) {
-	            return 'not_downloaded';
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        } else if (selectedIDs.some(incompleteRelation)) {
-	            return 'incomplete_relation';
-	        }
+	  projection.translate = function (_) {
+	    if (!arguments.length) return [x, y];
+	    x = +_[0];
+	    y = +_[1];
+	    return projection;
+	  };
 
-	        return false;
+	  projection.clipExtent = function (_) {
+	    if (!arguments.length) return clipExtent;
+	    clipExtent = _;
+	    return projection;
+	  };
 
+	  projection.transform = function (obj) {
+	    if (!arguments.length) return identity$2.translate(x, y).scale(k);
+	    x = +obj.x;
+	    y = +obj.y;
+	    k = +obj.k;
+	    return projection;
+	  };
 
-	        function someMissing() {
-	            if (context.inIntro()) { return false; }
-	            var osm = context.connection();
-	            if (osm) {
-	                var missing = coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-	                if (missing.length) {
-	                    missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
+	  projection.stream = d3_geoTransform({
+	    point: function point(x, y) {
+	      var vec = projection([x, y]);
+	      this.stream.point(vec[0], vec[1]);
+	    }
+	  }).stream;
+	  return projection;
+	}
 
-	        function incompleteRelation(id) {
-	            var entity = context.entity(id);
-	            return entity.type === 'relation' && !entity.isComplete(context.graph());
-	        }
-	    };
+	function geoOrthoNormalizedDotProduct(a, b, origin) {
+	  if (geoVecEqual(origin, a) || geoVecEqual(origin, b)) {
+	    return 1; // coincident points, treat as straight and try to remove
+	  }
 
+	  return geoVecNormalizedDot(a, b, origin);
+	}
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.rotate.' + disable + '.' + multi) :
-	            _t('operations.rotate.description.' + multi);
-	    };
+	function geoOrthoFilterDotProduct(dotp, epsilon, lowerThreshold, upperThreshold, allowStraightAngles) {
+	  var val = Math.abs(dotp);
+
+	  if (val < epsilon) {
+	    return 0; // already orthogonal
+	  } else if (allowStraightAngles && Math.abs(val - 1) < epsilon) {
+	    return 0; // straight angle, which is okay in this case
+	  } else if (val < lowerThreshold || val > upperThreshold) {
+	    return dotp; // can be adjusted
+	  } else {
+	    return null; // ignore vertex
+	  }
+	}
 
+	function geoOrthoCalcScore(points, isClosed, epsilon, threshold) {
+	  var score = 0;
+	  var first = isClosed ? 0 : 1;
+	  var last = isClosed ? points.length : points.length - 1;
+	  var coords = points.map(function (p) {
+	    return p.coord;
+	  });
+	  var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
+	  var upperThreshold = Math.cos(threshold * Math.PI / 180);
 
-	    operation.annotation = function() {
-	        return selectedIDs.length === 1 ?
-	            _t('operations.rotate.annotation.' + context.graph().geometry(selectedIDs[0])) :
-	            _t('operations.rotate.annotation.multiple');
-	    };
+	  for (var i = first; i < last; i++) {
+	    var a = coords[(i - 1 + coords.length) % coords.length];
+	    var origin = coords[i];
+	    var b = coords[(i + 1) % coords.length];
+	    var dotp = geoOrthoFilterDotProduct(geoOrthoNormalizedDotProduct(a, b, origin), epsilon, lowerThreshold, upperThreshold);
+	    if (dotp === null) continue; // ignore vertex
 
+	    score = score + 2.0 * Math.min(Math.abs(dotp - 1.0), Math.min(Math.abs(dotp), Math.abs(dotp + 1)));
+	  }
 
-	    operation.id = 'rotate';
-	    operation.keys = [_t('operations.rotate.key')];
-	    operation.title = _t('operations.rotate.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	  return score;
+	} // returns the maximum angle less than `lessThan` between the actual corner and a 0° or 90° corner
 
-	    operation.mouseOnly = true;
+	function geoOrthoMaxOffsetAngle(coords, isClosed, lessThan) {
+	  var max = -Infinity;
+	  var first = isClosed ? 0 : 1;
+	  var last = isClosed ? coords.length : coords.length - 1;
 
-	    return operation;
-	}
+	  for (var i = first; i < last; i++) {
+	    var a = coords[(i - 1 + coords.length) % coords.length];
+	    var origin = coords[i];
+	    var b = coords[(i + 1) % coords.length];
+	    var normalizedDotP = geoOrthoNormalizedDotProduct(a, b, origin);
+	    var angle = Math.acos(Math.abs(normalizedDotP)) * 180 / Math.PI;
+	    if (angle > 45) angle = 90 - angle;
+	    if (angle >= lessThan) continue;
+	    if (angle > max) max = angle;
+	  }
 
-	function modeMove(context, entityIDs, baseGraph) {
-	    var mode = {
-	        id: 'move',
-	        button: 'browse'
-	    };
+	  if (max === -Infinity) return null;
+	  return max;
+	} // similar to geoOrthoCalcScore, but returns quickly if there is something to do
 
-	    var keybinding = utilKeybinding('move');
-	    var behaviors = [
-	        behaviorEdit(context),
-	        operationCircularize(context, entityIDs).behavior,
-	        operationDelete(context, entityIDs).behavior,
-	        operationOrthogonalize(context, entityIDs).behavior,
-	        operationReflectLong(context, entityIDs).behavior,
-	        operationReflectShort(context, entityIDs).behavior,
-	        operationRotate(context, entityIDs).behavior
-	    ];
-	    var annotation = entityIDs.length === 1 ?
-	        _t('operations.move.annotation.' + context.graph().geometry(entityIDs[0])) :
-	        _t('operations.move.annotation.multiple');
+	function geoOrthoCanOrthogonalize(coords, isClosed, epsilon, threshold, allowStraightAngles) {
+	  var score = null;
+	  var first = isClosed ? 0 : 1;
+	  var last = isClosed ? coords.length : coords.length - 1;
+	  var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
+	  var upperThreshold = Math.cos(threshold * Math.PI / 180);
 
-	    var _prevGraph;
-	    var _cache;
-	    var _origin;
-	    var _nudgeInterval;
+	  for (var i = first; i < last; i++) {
+	    var a = coords[(i - 1 + coords.length) % coords.length];
+	    var origin = coords[i];
+	    var b = coords[(i + 1) % coords.length];
+	    var dotp = geoOrthoFilterDotProduct(geoOrthoNormalizedDotProduct(a, b, origin), epsilon, lowerThreshold, upperThreshold, allowStraightAngles);
+	    if (dotp === null) continue; // ignore vertex
 
+	    if (Math.abs(dotp) > 0) return 1; // something to do
 
-	    function doMove(nudge) {
-	        nudge = nudge || [0, 0];
+	    score = 0; // already square
+	  }
 
-	        var fn;
-	        if (_prevGraph !== context.graph()) {
-	            _cache = {};
-	            _origin = context.map().mouseCoordinates();
-	            fn = context.perform;
-	        } else {
-	            fn = context.overwrite;
-	        }
+	  return score;
+	}
 
-	        var currMouse = context.map().mouse();
-	        var origMouse = context.projection(_origin);
-	        var delta = geoVecSubtract(geoVecSubtract(currMouse, origMouse), nudge);
+	var $$l = _export;
+	var FREEZING = freezing;
+	var fails$9 = fails$N;
+	var isObject$4 = isObject$r;
+	var onFreeze = internalMetadata.exports.onFreeze;
 
-	        fn(actionMove(entityIDs, delta, context.projection, _cache));
-	        _prevGraph = context.graph();
-	    }
+	// eslint-disable-next-line es/no-object-freeze -- safe
+	var $freeze = Object.freeze;
+	var FAILS_ON_PRIMITIVES = fails$9(function () { $freeze(1); });
 
+	// `Object.freeze` method
+	// https://tc39.es/ecma262/#sec-object.freeze
+	$$l({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES, sham: !FREEZING }, {
+	  freeze: function freeze(it) {
+	    return $freeze && isObject$4(it) ? $freeze(onFreeze(it)) : it;
+	  }
+	});
 
-	    function startNudge(nudge) {
-	        if (_nudgeInterval) { window.clearInterval(_nudgeInterval); }
-	        _nudgeInterval = window.setInterval(function() {
-	            context.map().pan(nudge);
-	            doMove(nudge);
-	        }, 50);
-	    }
+	// Returns true if a and b have the same elements at the same indices.
+	function utilArrayIdentical(a, b) {
+	  // an array is always identical to itself
+	  if (a === b) return true;
+	  var i = a.length;
+	  if (i !== b.length) return false;
 
+	  while (i--) {
+	    if (a[i] !== b[i]) return false;
+	  }
 
-	    function stopNudge() {
-	        if (_nudgeInterval) {
-	            window.clearInterval(_nudgeInterval);
-	            _nudgeInterval = null;
-	        }
-	    }
+	  return true;
+	} // http://2ality.com/2015/01/es6-set-operations.html
+	// Difference (a \ b): create a set that contains those elements of set a that are not in set b.
+	// This operation is also sometimes called minus (-).
+	// var a = [1,2,3];
+	// var b = [4,3,2];
+	// utilArrayDifference(a, b)
+	//   [1]
+	// utilArrayDifference(b, a)
+	//   [4]
 
+	function utilArrayDifference(a, b) {
+	  var other = new Set(b);
+	  return Array.from(new Set(a)).filter(function (v) {
+	    return !other.has(v);
+	  });
+	} // Intersection (a ∩ b): create a set that contains those elements of set a that are also in set b.
+	// var a = [1,2,3];
+	// var b = [4,3,2];
+	// utilArrayIntersection(a, b)
+	//   [2,3]
 
-	    function move() {
-	        doMove();
-	        var nudge = geoViewportEdge(context.map().mouse(), context.map().dimensions());
-	        if (nudge) {
-	            startNudge(nudge);
-	        } else {
-	            stopNudge();
-	        }
-	    }
+	function utilArrayIntersection(a, b) {
+	  var other = new Set(b);
+	  return Array.from(new Set(a)).filter(function (v) {
+	    return other.has(v);
+	  });
+	} // Union (a ∪ b): create a set that contains the elements of both set a and set b.
+	// var a = [1,2,3];
+	// var b = [4,3,2];
+	// utilArrayUnion(a, b)
+	//   [1,2,3,4]
 
+	function utilArrayUnion(a, b) {
+	  var result = new Set(a);
+	  b.forEach(function (v) {
+	    result.add(v);
+	  });
+	  return Array.from(result);
+	} // Returns an Array with all the duplicates removed
+	// var a = [1,1,2,3,3];
+	// utilArrayUniq(a)
+	//   [1,2,3]
 
-	    function finish() {
-	        event.stopPropagation();
-	        context.replace(actionNoop(), annotation);
-	        context.enter(modeSelect(context, entityIDs));
-	        stopNudge();
-	    }
+	function utilArrayUniq(a) {
+	  return Array.from(new Set(a));
+	} // Splits array into chunks of given chunk size
+	// var a = [1,2,3,4,5,6,7];
+	// utilArrayChunk(a, 3);
+	//   [[1,2,3],[4,5,6],[7]];
 
+	function utilArrayChunk(a, chunkSize) {
+	  if (!chunkSize || chunkSize < 0) return [a.slice()];
+	  var result = new Array(Math.ceil(a.length / chunkSize));
+	  return Array.from(result, function (item, i) {
+	    return a.slice(i * chunkSize, i * chunkSize + chunkSize);
+	  });
+	} // Flattens two level array into a single level
+	// var a = [[1,2,3],[4,5,6],[7]];
+	// utilArrayFlatten(a);
+	//   [1,2,3,4,5,6,7];
 
-	    function cancel() {
-	        if (baseGraph) {
-	            while (context.graph() !== baseGraph) { context.pop(); }
-	            context.enter(modeBrowse(context));
-	        } else {
-	            context.pop();
-	            context.enter(modeSelect(context, entityIDs));
-	        }
-	        stopNudge();
-	    }
+	function utilArrayFlatten(a) {
+	  return a.reduce(function (acc, val) {
+	    return acc.concat(val);
+	  }, []);
+	} // Groups the items of the Array according to the given key
+	// `key` can be passed as a property or as a key function
+	//
+	// var pets = [
+	//     { type: 'Dog', name: 'Spot' },
+	//     { type: 'Cat', name: 'Tiger' },
+	//     { type: 'Dog', name: 'Rover' },
+	//     { type: 'Cat', name: 'Leo' }
+	// ];
+	//
+	// utilArrayGroupBy(pets, 'type')
+	//   {
+	//     'Dog': [{type: 'Dog', name: 'Spot'}, {type: 'Dog', name: 'Rover'}],
+	//     'Cat': [{type: 'Cat', name: 'Tiger'}, {type: 'Cat', name: 'Leo'}]
+	//   }
+	//
+	// utilArrayGroupBy(pets, function(item) { return item.name.length; })
+	//   {
+	//     3: [{type: 'Cat', name: 'Leo'}],
+	//     4: [{type: 'Dog', name: 'Spot'}],
+	//     5: [{type: 'Cat', name: 'Tiger'}, {type: 'Dog', name: 'Rover'}]
+	//   }
 
+	function utilArrayGroupBy(a, key) {
+	  return a.reduce(function (acc, item) {
+	    var group = typeof key === 'function' ? key(item) : item[key];
+	    (acc[group] = acc[group] || []).push(item);
+	    return acc;
+	  }, {});
+	} // Returns an Array with all the duplicates removed
+	// where uniqueness determined by the given key
+	// `key` can be passed as a property or as a key function
+	//
+	// var pets = [
+	//     { type: 'Dog', name: 'Spot' },
+	//     { type: 'Cat', name: 'Tiger' },
+	//     { type: 'Dog', name: 'Rover' },
+	//     { type: 'Cat', name: 'Leo' }
+	// ];
+	//
+	// utilArrayUniqBy(pets, 'type')
+	//   [
+	//     { type: 'Dog', name: 'Spot' },
+	//     { type: 'Cat', name: 'Tiger' }
+	//   ]
+	//
+	// utilArrayUniqBy(pets, function(item) { return item.name.length; })
+	//   [
+	//     { type: 'Dog', name: 'Spot' },
+	//     { type: 'Cat', name: 'Tiger' },
+	//     { type: 'Cat', name: 'Leo' }
+	//   }
 
-	    function undone() {
-	        context.enter(modeBrowse(context));
+	function utilArrayUniqBy(a, key) {
+	  var seen = new Set();
+	  return a.reduce(function (acc, item) {
+	    var val = typeof key === 'function' ? key(item) : item[key];
+
+	    if (val && !seen.has(val)) {
+	      seen.add(val);
+	      acc.push(item);
+	    }
+
+	    return acc;
+	  }, []);
+	}
+
+	var DESCRIPTORS$2 = descriptors;
+	var global$2 = global$F;
+	var isForced = isForced_1;
+	var redefine$1 = redefine$g.exports;
+	var has = has$j;
+	var classof$1 = classofRaw$1;
+	var inheritIfRequired = inheritIfRequired$4;
+	var toPrimitive$1 = toPrimitive$7;
+	var fails$8 = fails$N;
+	var create$2 = objectCreate;
+	var getOwnPropertyNames = objectGetOwnPropertyNames.f;
+	var getOwnPropertyDescriptor$2 = objectGetOwnPropertyDescriptor.f;
+	var defineProperty = objectDefineProperty.f;
+	var trim$2 = stringTrim.trim;
+
+	var NUMBER = 'Number';
+	var NativeNumber = global$2[NUMBER];
+	var NumberPrototype = NativeNumber.prototype;
+
+	// Opera ~12 has broken Object#toString
+	var BROKEN_CLASSOF = classof$1(create$2(NumberPrototype)) == NUMBER;
+
+	// `ToNumber` abstract operation
+	// https://tc39.es/ecma262/#sec-tonumber
+	var toNumber$1 = function (argument) {
+	  var it = toPrimitive$1(argument, false);
+	  var first, third, radix, maxCode, digits, length, index, code;
+	  if (typeof it == 'string' && it.length > 2) {
+	    it = trim$2(it);
+	    first = it.charCodeAt(0);
+	    if (first === 43 || first === 45) {
+	      third = it.charCodeAt(2);
+	      if (third === 88 || third === 120) return NaN; // Number('+0x1') should be NaN, old V8 fix
+	    } else if (first === 48) {
+	      switch (it.charCodeAt(1)) {
+	        case 66: case 98: radix = 2; maxCode = 49; break; // fast equal of /^0b[01]+$/i
+	        case 79: case 111: radix = 8; maxCode = 55; break; // fast equal of /^0o[0-7]+$/i
+	        default: return +it;
+	      }
+	      digits = it.slice(2);
+	      length = digits.length;
+	      for (index = 0; index < length; index++) {
+	        code = digits.charCodeAt(index);
+	        // parseInt parses a string to a first unavailable symbol
+	        // but ToNumber should return NaN if a string contains unavailable symbols
+	        if (code < 48 || code > maxCode) return NaN;
+	      } return parseInt(digits, radix);
+	    }
+	  } return +it;
+	};
+
+	// `Number` constructor
+	// https://tc39.es/ecma262/#sec-number-constructor
+	if (isForced(NUMBER, !NativeNumber(' 0o1') || !NativeNumber('0b1') || NativeNumber('+0x1'))) {
+	  var NumberWrapper = function Number(value) {
+	    var it = arguments.length < 1 ? 0 : value;
+	    var dummy = this;
+	    return dummy instanceof NumberWrapper
+	      // check on 1..constructor(foo) case
+	      && (BROKEN_CLASSOF ? fails$8(function () { NumberPrototype.valueOf.call(dummy); }) : classof$1(dummy) != NUMBER)
+	        ? inheritIfRequired(new NativeNumber(toNumber$1(it)), dummy, NumberWrapper) : toNumber$1(it);
+	  };
+	  for (var keys = DESCRIPTORS$2 ? getOwnPropertyNames(NativeNumber) : (
+	    // ES3:
+	    'MAX_VALUE,MIN_VALUE,NaN,NEGATIVE_INFINITY,POSITIVE_INFINITY,' +
+	    // ES2015 (in case, if modules with ES2015 Number statics required before):
+	    'EPSILON,isFinite,isInteger,isNaN,isSafeInteger,MAX_SAFE_INTEGER,' +
+	    'MIN_SAFE_INTEGER,parseFloat,parseInt,isInteger,' +
+	    // ESNext
+	    'fromString,range'
+	  ).split(','), j$1 = 0, key; keys.length > j$1; j$1++) {
+	    if (has(NativeNumber, key = keys[j$1]) && !has(NumberWrapper, key)) {
+	      defineProperty(NumberWrapper, key, getOwnPropertyDescriptor$2(NativeNumber, key));
+	    }
+	  }
+	  NumberWrapper.prototype = NumberPrototype;
+	  NumberPrototype.constructor = NumberWrapper;
+	  redefine$1(global$2, NUMBER, NumberWrapper);
+	}
+
+	var fixRegExpWellKnownSymbolLogic$1 = fixRegexpWellKnownSymbolLogic;
+	var anObject$1 = anObject$m;
+	var toLength$3 = toLength$q;
+	var requireObjectCoercible$7 = requireObjectCoercible$e;
+	var advanceStringIndex = advanceStringIndex$3;
+	var regExpExec$1 = regexpExecAbstract;
+
+	// @@match logic
+	fixRegExpWellKnownSymbolLogic$1('match', function (MATCH, nativeMatch, maybeCallNative) {
+	  return [
+	    // `String.prototype.match` method
+	    // https://tc39.es/ecma262/#sec-string.prototype.match
+	    function match(regexp) {
+	      var O = requireObjectCoercible$7(this);
+	      var matcher = regexp == undefined ? undefined : regexp[MATCH];
+	      return matcher !== undefined ? matcher.call(regexp, O) : new RegExp(regexp)[MATCH](String(O));
+	    },
+	    // `RegExp.prototype[@@match]` method
+	    // https://tc39.es/ecma262/#sec-regexp.prototype-@@match
+	    function (string) {
+	      var res = maybeCallNative(nativeMatch, this, string);
+	      if (res.done) return res.value;
+
+	      var rx = anObject$1(this);
+	      var S = String(string);
+
+	      if (!rx.global) return regExpExec$1(rx, S);
+
+	      var fullUnicode = rx.unicode;
+	      rx.lastIndex = 0;
+	      var A = [];
+	      var n = 0;
+	      var result;
+	      while ((result = regExpExec$1(rx, S)) !== null) {
+	        var matchStr = String(result[0]);
+	        A[n] = matchStr;
+	        if (matchStr === '') rx.lastIndex = advanceStringIndex(S, toLength$3(rx.lastIndex), fullUnicode);
+	        n++;
+	      }
+	      return n === 0 ? null : A;
 	    }
+	  ];
+	});
 
+	var diacritics = {};
+
+	var remove$6 = diacritics.remove = removeDiacritics;
+	var replacementList = [{
+	  base: ' ',
+	  chars: "\xA0"
+	}, {
+	  base: '0',
+	  chars: "\u07C0"
+	}, {
+	  base: 'A',
+	  chars: "\u24B6\uFF21\xC0\xC1\xC2\u1EA6\u1EA4\u1EAA\u1EA8\xC3\u0100\u0102\u1EB0\u1EAE\u1EB4\u1EB2\u0226\u01E0\xC4\u01DE\u1EA2\xC5\u01FA\u01CD\u0200\u0202\u1EA0\u1EAC\u1EB6\u1E00\u0104\u023A\u2C6F"
+	}, {
+	  base: 'AA',
+	  chars: "\uA732"
+	}, {
+	  base: 'AE',
+	  chars: "\xC6\u01FC\u01E2"
+	}, {
+	  base: 'AO',
+	  chars: "\uA734"
+	}, {
+	  base: 'AU',
+	  chars: "\uA736"
+	}, {
+	  base: 'AV',
+	  chars: "\uA738\uA73A"
+	}, {
+	  base: 'AY',
+	  chars: "\uA73C"
+	}, {
+	  base: 'B',
+	  chars: "\u24B7\uFF22\u1E02\u1E04\u1E06\u0243\u0181"
+	}, {
+	  base: 'C',
+	  chars: "\u24B8\uFF23\uA73E\u1E08\u0106C\u0108\u010A\u010C\xC7\u0187\u023B"
+	}, {
+	  base: 'D',
+	  chars: "\u24B9\uFF24\u1E0A\u010E\u1E0C\u1E10\u1E12\u1E0E\u0110\u018A\u0189\u1D05\uA779"
+	}, {
+	  base: 'Dh',
+	  chars: "\xD0"
+	}, {
+	  base: 'DZ',
+	  chars: "\u01F1\u01C4"
+	}, {
+	  base: 'Dz',
+	  chars: "\u01F2\u01C5"
+	}, {
+	  base: 'E',
+	  chars: "\u025B\u24BA\uFF25\xC8\xC9\xCA\u1EC0\u1EBE\u1EC4\u1EC2\u1EBC\u0112\u1E14\u1E16\u0114\u0116\xCB\u1EBA\u011A\u0204\u0206\u1EB8\u1EC6\u0228\u1E1C\u0118\u1E18\u1E1A\u0190\u018E\u1D07"
+	}, {
+	  base: 'F',
+	  chars: "\uA77C\u24BB\uFF26\u1E1E\u0191\uA77B"
+	}, {
+	  base: 'G',
+	  chars: "\u24BC\uFF27\u01F4\u011C\u1E20\u011E\u0120\u01E6\u0122\u01E4\u0193\uA7A0\uA77D\uA77E\u0262"
+	}, {
+	  base: 'H',
+	  chars: "\u24BD\uFF28\u0124\u1E22\u1E26\u021E\u1E24\u1E28\u1E2A\u0126\u2C67\u2C75\uA78D"
+	}, {
+	  base: 'I',
+	  chars: "\u24BE\uFF29\xCC\xCD\xCE\u0128\u012A\u012C\u0130\xCF\u1E2E\u1EC8\u01CF\u0208\u020A\u1ECA\u012E\u1E2C\u0197"
+	}, {
+	  base: 'J',
+	  chars: "\u24BF\uFF2A\u0134\u0248\u0237"
+	}, {
+	  base: 'K',
+	  chars: "\u24C0\uFF2B\u1E30\u01E8\u1E32\u0136\u1E34\u0198\u2C69\uA740\uA742\uA744\uA7A2"
+	}, {
+	  base: 'L',
+	  chars: "\u24C1\uFF2C\u013F\u0139\u013D\u1E36\u1E38\u013B\u1E3C\u1E3A\u0141\u023D\u2C62\u2C60\uA748\uA746\uA780"
+	}, {
+	  base: 'LJ',
+	  chars: "\u01C7"
+	}, {
+	  base: 'Lj',
+	  chars: "\u01C8"
+	}, {
+	  base: 'M',
+	  chars: "\u24C2\uFF2D\u1E3E\u1E40\u1E42\u2C6E\u019C\u03FB"
+	}, {
+	  base: 'N',
+	  chars: "\uA7A4\u0220\u24C3\uFF2E\u01F8\u0143\xD1\u1E44\u0147\u1E46\u0145\u1E4A\u1E48\u019D\uA790\u1D0E"
+	}, {
+	  base: 'NJ',
+	  chars: "\u01CA"
+	}, {
+	  base: 'Nj',
+	  chars: "\u01CB"
+	}, {
+	  base: 'O',
+	  chars: "\u24C4\uFF2F\xD2\xD3\xD4\u1ED2\u1ED0\u1ED6\u1ED4\xD5\u1E4C\u022C\u1E4E\u014C\u1E50\u1E52\u014E\u022E\u0230\xD6\u022A\u1ECE\u0150\u01D1\u020C\u020E\u01A0\u1EDC\u1EDA\u1EE0\u1EDE\u1EE2\u1ECC\u1ED8\u01EA\u01EC\xD8\u01FE\u0186\u019F\uA74A\uA74C"
+	}, {
+	  base: 'OE',
+	  chars: "\u0152"
+	}, {
+	  base: 'OI',
+	  chars: "\u01A2"
+	}, {
+	  base: 'OO',
+	  chars: "\uA74E"
+	}, {
+	  base: 'OU',
+	  chars: "\u0222"
+	}, {
+	  base: 'P',
+	  chars: "\u24C5\uFF30\u1E54\u1E56\u01A4\u2C63\uA750\uA752\uA754"
+	}, {
+	  base: 'Q',
+	  chars: "\u24C6\uFF31\uA756\uA758\u024A"
+	}, {
+	  base: 'R',
+	  chars: "\u24C7\uFF32\u0154\u1E58\u0158\u0210\u0212\u1E5A\u1E5C\u0156\u1E5E\u024C\u2C64\uA75A\uA7A6\uA782"
+	}, {
+	  base: 'S',
+	  chars: "\u24C8\uFF33\u1E9E\u015A\u1E64\u015C\u1E60\u0160\u1E66\u1E62\u1E68\u0218\u015E\u2C7E\uA7A8\uA784"
+	}, {
+	  base: 'T',
+	  chars: "\u24C9\uFF34\u1E6A\u0164\u1E6C\u021A\u0162\u1E70\u1E6E\u0166\u01AC\u01AE\u023E\uA786"
+	}, {
+	  base: 'Th',
+	  chars: "\xDE"
+	}, {
+	  base: 'TZ',
+	  chars: "\uA728"
+	}, {
+	  base: 'U',
+	  chars: "\u24CA\uFF35\xD9\xDA\xDB\u0168\u1E78\u016A\u1E7A\u016C\xDC\u01DB\u01D7\u01D5\u01D9\u1EE6\u016E\u0170\u01D3\u0214\u0216\u01AF\u1EEA\u1EE8\u1EEE\u1EEC\u1EF0\u1EE4\u1E72\u0172\u1E76\u1E74\u0244"
+	}, {
+	  base: 'V',
+	  chars: "\u24CB\uFF36\u1E7C\u1E7E\u01B2\uA75E\u0245"
+	}, {
+	  base: 'VY',
+	  chars: "\uA760"
+	}, {
+	  base: 'W',
+	  chars: "\u24CC\uFF37\u1E80\u1E82\u0174\u1E86\u1E84\u1E88\u2C72"
+	}, {
+	  base: 'X',
+	  chars: "\u24CD\uFF38\u1E8A\u1E8C"
+	}, {
+	  base: 'Y',
+	  chars: "\u24CE\uFF39\u1EF2\xDD\u0176\u1EF8\u0232\u1E8E\u0178\u1EF6\u1EF4\u01B3\u024E\u1EFE"
+	}, {
+	  base: 'Z',
+	  chars: "\u24CF\uFF3A\u0179\u1E90\u017B\u017D\u1E92\u1E94\u01B5\u0224\u2C7F\u2C6B\uA762"
+	}, {
+	  base: 'a',
+	  chars: "\u24D0\uFF41\u1E9A\xE0\xE1\xE2\u1EA7\u1EA5\u1EAB\u1EA9\xE3\u0101\u0103\u1EB1\u1EAF\u1EB5\u1EB3\u0227\u01E1\xE4\u01DF\u1EA3\xE5\u01FB\u01CE\u0201\u0203\u1EA1\u1EAD\u1EB7\u1E01\u0105\u2C65\u0250\u0251"
+	}, {
+	  base: 'aa',
+	  chars: "\uA733"
+	}, {
+	  base: 'ae',
+	  chars: "\xE6\u01FD\u01E3"
+	}, {
+	  base: 'ao',
+	  chars: "\uA735"
+	}, {
+	  base: 'au',
+	  chars: "\uA737"
+	}, {
+	  base: 'av',
+	  chars: "\uA739\uA73B"
+	}, {
+	  base: 'ay',
+	  chars: "\uA73D"
+	}, {
+	  base: 'b',
+	  chars: "\u24D1\uFF42\u1E03\u1E05\u1E07\u0180\u0183\u0253\u0182"
+	}, {
+	  base: 'c',
+	  chars: "\uFF43\u24D2\u0107\u0109\u010B\u010D\xE7\u1E09\u0188\u023C\uA73F\u2184"
+	}, {
+	  base: 'd',
+	  chars: "\u24D3\uFF44\u1E0B\u010F\u1E0D\u1E11\u1E13\u1E0F\u0111\u018C\u0256\u0257\u018B\u13E7\u0501\uA7AA"
+	}, {
+	  base: 'dh',
+	  chars: "\xF0"
+	}, {
+	  base: 'dz',
+	  chars: "\u01F3\u01C6"
+	}, {
+	  base: 'e',
+	  chars: "\u24D4\uFF45\xE8\xE9\xEA\u1EC1\u1EBF\u1EC5\u1EC3\u1EBD\u0113\u1E15\u1E17\u0115\u0117\xEB\u1EBB\u011B\u0205\u0207\u1EB9\u1EC7\u0229\u1E1D\u0119\u1E19\u1E1B\u0247\u01DD"
+	}, {
+	  base: 'f',
+	  chars: "\u24D5\uFF46\u1E1F\u0192"
+	}, {
+	  base: 'ff',
+	  chars: "\uFB00"
+	}, {
+	  base: 'fi',
+	  chars: "\uFB01"
+	}, {
+	  base: 'fl',
+	  chars: "\uFB02"
+	}, {
+	  base: 'ffi',
+	  chars: "\uFB03"
+	}, {
+	  base: 'ffl',
+	  chars: "\uFB04"
+	}, {
+	  base: 'g',
+	  chars: "\u24D6\uFF47\u01F5\u011D\u1E21\u011F\u0121\u01E7\u0123\u01E5\u0260\uA7A1\uA77F\u1D79"
+	}, {
+	  base: 'h',
+	  chars: "\u24D7\uFF48\u0125\u1E23\u1E27\u021F\u1E25\u1E29\u1E2B\u1E96\u0127\u2C68\u2C76\u0265"
+	}, {
+	  base: 'hv',
+	  chars: "\u0195"
+	}, {
+	  base: 'i',
+	  chars: "\u24D8\uFF49\xEC\xED\xEE\u0129\u012B\u012D\xEF\u1E2F\u1EC9\u01D0\u0209\u020B\u1ECB\u012F\u1E2D\u0268\u0131"
+	}, {
+	  base: 'j',
+	  chars: "\u24D9\uFF4A\u0135\u01F0\u0249"
+	}, {
+	  base: 'k',
+	  chars: "\u24DA\uFF4B\u1E31\u01E9\u1E33\u0137\u1E35\u0199\u2C6A\uA741\uA743\uA745\uA7A3"
+	}, {
+	  base: 'l',
+	  chars: "\u24DB\uFF4C\u0140\u013A\u013E\u1E37\u1E39\u013C\u1E3D\u1E3B\u017F\u0142\u019A\u026B\u2C61\uA749\uA781\uA747\u026D"
+	}, {
+	  base: 'lj',
+	  chars: "\u01C9"
+	}, {
+	  base: 'm',
+	  chars: "\u24DC\uFF4D\u1E3F\u1E41\u1E43\u0271\u026F"
+	}, {
+	  base: 'n',
+	  chars: "\u24DD\uFF4E\u01F9\u0144\xF1\u1E45\u0148\u1E47\u0146\u1E4B\u1E49\u019E\u0272\u0149\uA791\uA7A5\u043B\u0509"
+	}, {
+	  base: 'nj',
+	  chars: "\u01CC"
+	}, {
+	  base: 'o',
+	  chars: "\u24DE\uFF4F\xF2\xF3\xF4\u1ED3\u1ED1\u1ED7\u1ED5\xF5\u1E4D\u022D\u1E4F\u014D\u1E51\u1E53\u014F\u022F\u0231\xF6\u022B\u1ECF\u0151\u01D2\u020D\u020F\u01A1\u1EDD\u1EDB\u1EE1\u1EDF\u1EE3\u1ECD\u1ED9\u01EB\u01ED\xF8\u01FF\uA74B\uA74D\u0275\u0254\u1D11"
+	}, {
+	  base: 'oe',
+	  chars: "\u0153"
+	}, {
+	  base: 'oi',
+	  chars: "\u01A3"
+	}, {
+	  base: 'oo',
+	  chars: "\uA74F"
+	}, {
+	  base: 'ou',
+	  chars: "\u0223"
+	}, {
+	  base: 'p',
+	  chars: "\u24DF\uFF50\u1E55\u1E57\u01A5\u1D7D\uA751\uA753\uA755\u03C1"
+	}, {
+	  base: 'q',
+	  chars: "\u24E0\uFF51\u024B\uA757\uA759"
+	}, {
+	  base: 'r',
+	  chars: "\u24E1\uFF52\u0155\u1E59\u0159\u0211\u0213\u1E5B\u1E5D\u0157\u1E5F\u024D\u027D\uA75B\uA7A7\uA783"
+	}, {
+	  base: 's',
+	  chars: "\u24E2\uFF53\u015B\u1E65\u015D\u1E61\u0161\u1E67\u1E63\u1E69\u0219\u015F\u023F\uA7A9\uA785\u1E9B\u0282"
+	}, {
+	  base: 'ss',
+	  chars: "\xDF"
+	}, {
+	  base: 't',
+	  chars: "\u24E3\uFF54\u1E6B\u1E97\u0165\u1E6D\u021B\u0163\u1E71\u1E6F\u0167\u01AD\u0288\u2C66\uA787"
+	}, {
+	  base: 'th',
+	  chars: "\xFE"
+	}, {
+	  base: 'tz',
+	  chars: "\uA729"
+	}, {
+	  base: 'u',
+	  chars: "\u24E4\uFF55\xF9\xFA\xFB\u0169\u1E79\u016B\u1E7B\u016D\xFC\u01DC\u01D8\u01D6\u01DA\u1EE7\u016F\u0171\u01D4\u0215\u0217\u01B0\u1EEB\u1EE9\u1EEF\u1EED\u1EF1\u1EE5\u1E73\u0173\u1E77\u1E75\u0289"
+	}, {
+	  base: 'v',
+	  chars: "\u24E5\uFF56\u1E7D\u1E7F\u028B\uA75F\u028C"
+	}, {
+	  base: 'vy',
+	  chars: "\uA761"
+	}, {
+	  base: 'w',
+	  chars: "\u24E6\uFF57\u1E81\u1E83\u0175\u1E87\u1E85\u1E98\u1E89\u2C73"
+	}, {
+	  base: 'x',
+	  chars: "\u24E7\uFF58\u1E8B\u1E8D"
+	}, {
+	  base: 'y',
+	  chars: "\u24E8\uFF59\u1EF3\xFD\u0177\u1EF9\u0233\u1E8F\xFF\u1EF7\u1E99\u1EF5\u01B4\u024F\u1EFF"
+	}, {
+	  base: 'z',
+	  chars: "\u24E9\uFF5A\u017A\u1E91\u017C\u017E\u1E93\u1E95\u01B6\u0225\u0240\u2C6C\uA763"
+	}];
+	var diacriticsMap = {};
 
-	    mode.enter = function() {
-	        _origin = context.map().mouseCoordinates();
-	        _prevGraph = null;
-	        _cache = {};
-
-	        context.features().forceVisible(entityIDs);
-
-	        behaviors.forEach(context.install);
+	for (var i$1 = 0; i$1 < replacementList.length; i$1 += 1) {
+	  var chars = replacementList[i$1].chars;
 
-	        context.surface()
-	            .on('mousemove.move', move)
-	            .on('click.move', finish);
+	  for (var j = 0; j < chars.length; j += 1) {
+	    diacriticsMap[chars[j]] = replacementList[i$1].base;
+	  }
+	}
 
-	        context.history()
-	            .on('undone.move', undone);
+	function removeDiacritics(str) {
+	  return str.replace(/[^\u0000-\u007e]/g, function (c) {
+	    return diacriticsMap[c] || c;
+	  });
+	}
 
-	        keybinding
-	            .on('⎋', cancel)
-	            .on('↩', finish);
+	diacritics.replacementList = replacementList;
+	diacritics.diacriticsMap = diacriticsMap;
 
-	        select(document)
-	            .call(keybinding);
-	    };
+	var lib = {};
 
+	var isArabic$1 = {};
 
-	    mode.exit = function() {
-	        stopNudge();
+	Object.defineProperty(isArabic$1, "__esModule", {
+	  value: true
+	});
+	var arabicBlocks = [[0x0600, 0x06FF], [0x0750, 0x077F], [0x08A0, 0x08FF], [0xFB50, 0xFDFF], [0xFE70, 0xFEFF], [0x10E60, 0x10E7F], [0x1EC70, 0x1ECBF], [0x1EE00, 0x1EEFF] // Mathematical Alphabetic symbols https://www.unicode.org/charts/PDF/U1EE00.pdf
+	];
 
-	        behaviors.forEach(function(behavior) {
-	            context.uninstall(behavior);
-	        });
+	function isArabic(_char) {
+	  if (_char.length > 1) {
+	    // allow the newer chars?
+	    throw new Error('isArabic works on only one-character strings');
+	  }
 
-	        context.surface()
-	            .on('mousemove.move', null)
-	            .on('click.move', null);
+	  var code = _char.charCodeAt(0);
 
-	        context.history()
-	            .on('undone.move', null);
+	  for (var i = 0; i < arabicBlocks.length; i++) {
+	    var block = arabicBlocks[i];
 
-	        select(document)
-	            .call(keybinding.unbind);
+	    if (code >= block[0] && code <= block[1]) {
+	      return true;
+	    }
+	  }
 
-	        context.features().forceVisible([]);
-	    };
+	  return false;
+	}
 
+	isArabic$1.isArabic = isArabic;
 
-	    mode.selectedIDs = function() {
-	        if (!arguments.length) { return entityIDs; }
-	        // no assign
-	        return mode;
-	    };
+	function isMath(_char2) {
+	  if (_char2.length > 2) {
+	    // allow the newer chars?
+	    throw new Error('isMath works on only one-character strings');
+	  }
 
+	  var code = _char2.charCodeAt(0);
 
-	    return mode;
+	  return code >= 0x660 && code <= 0x66C || code >= 0x6F0 && code <= 0x6F9;
 	}
 
-	// see also `operationPaste`
-	function behaviorPaste(context) {
-
-	    function doPaste() {
-	        // prevent paste during low zoom selection
-	        if (!context.map().withinEditableZoom()) { return; }
+	isArabic$1.isMath = isMath;
 
-	        event.preventDefault();
+	var GlyphSplitter$1 = {};
 
-	        var baseGraph = context.graph();
-	        var mouse = context.map().mouse();
-	        var projection = context.projection;
-	        var viewport = geoExtent(projection.clipExtent()).polygon();
+	var reference = {};
 
-	        if (!geoPointInPolygon(mouse, viewport)) { return; }
+	var unicodeArabic = {};
 
-	        var oldIDs = context.copyIDs();
-	        if (!oldIDs.length) { return; }
+	Object.defineProperty(unicodeArabic, "__esModule", {
+	  value: true
+	});
+	var arabicReference = {
+	  "alef": {
+	    "normal": ["\u0627"],
+	    "madda_above": {
+	      "normal": ["\u0627\u0653", "\u0622"],
+	      "isolated": "\uFE81",
+	      "final": "\uFE82"
+	    },
+	    "hamza_above": {
+	      "normal": ["\u0627\u0654", "\u0623"],
+	      "isolated": "\uFE83",
+	      "final": "\uFE84"
+	    },
+	    "hamza_below": {
+	      "normal": ["\u0627\u0655", "\u0625"],
+	      "isolated": "\uFE87",
+	      "final": "\uFE88"
+	    },
+	    "wasla": {
+	      "normal": "\u0671",
+	      "isolated": "\uFB50",
+	      "final": "\uFB51"
+	    },
+	    "wavy_hamza_above": ["\u0672"],
+	    "wavy_hamza_below": ["\u0627\u065F", "\u0673"],
+	    "high_hamza": ["\u0675", "\u0627\u0674"],
+	    "indic_two_above": ["\u0773"],
+	    "indic_three_above": ["\u0774"],
+	    "fathatan": {
+	      "normal": ["\u0627\u064B"],
+	      "final": "\uFD3C",
+	      "isolated": "\uFD3D"
+	    },
+	    "isolated": "\uFE8D",
+	    "final": "\uFE8E"
+	  },
+	  "beh": {
+	    "normal": ["\u0628"],
+	    "dotless": ["\u066E"],
+	    "three_dots_horizontally_below": ["\u0750"],
+	    "dot_below_three_dots_above": ["\u0751"],
+	    "three_dots_pointing_upwards_below": ["\u0752"],
+	    "three_dots_pointing_upwards_below_two_dots_above": ["\u0753"],
+	    "two_dots_below_dot_above": ["\u0754"],
+	    "inverted_small_v_below": ["\u0755"],
+	    "small_v": ["\u0756"],
+	    "small_v_below": ["\u08A0"],
+	    "hamza_above": ["\u08A1"],
+	    "small_meem_above": ["\u08B6"],
+	    "isolated": "\uFE8F",
+	    "final": "\uFE90",
+	    "initial": "\uFE91",
+	    "medial": "\uFE92"
+	  },
+	  "teh marbuta": {
+	    "normal": ["\u0629"],
+	    "isolated": "\uFE93",
+	    "final": "\uFE94"
+	  },
+	  "teh": {
+	    "normal": ["\u062A"],
+	    "ring": ["\u067C"],
+	    "three_dots_above_downwards": ["\u067D"],
+	    "small_teh_above": ["\u08B8"],
+	    "isolated": "\uFE95",
+	    "final": "\uFE96",
+	    "initial": "\uFE97",
+	    "medial": "\uFE98"
+	  },
+	  "theh": {
+	    "normal": ["\u062B"],
+	    "isolated": "\uFE99",
+	    "final": "\uFE9A",
+	    "initial": "\uFE9B",
+	    "medial": "\uFE9C"
+	  },
+	  "jeem": {
+	    "normal": ["\u062C"],
+	    "two_dots_above": ["\u08A2"],
+	    "isolated": "\uFE9D",
+	    "final": "\uFE9E",
+	    "initial": "\uFE9F",
+	    "medial": "\uFEA0"
+	  },
+	  "hah": {
+	    "normal": ["\u062D"],
+	    "hamza_above": ["\u0681"],
+	    "two_dots_vertical_above": ["\u0682"],
+	    "three_dots_above": ["\u0685"],
+	    "two_dots_above": ["\u0757"],
+	    "three_dots_pointing_upwards_below": ["\u0758"],
+	    "small_tah_below": ["\u076E"],
+	    "small_tah_two_dots": ["\u076F"],
+	    "small_tah_above": ["\u0772"],
+	    "indic_four_below": ["\u077C"],
+	    "isolated": "\uFEA1",
+	    "final": "\uFEA2",
+	    "initial": "\uFEA3",
+	    "medial": "\uFEA4"
+	  },
+	  "khah": {
+	    "normal": ["\u062E"],
+	    "isolated": "\uFEA5",
+	    "final": "\uFEA6",
+	    "initial": "\uFEA7",
+	    "medial": "\uFEA8"
+	  },
+	  "dal": {
+	    "normal": ["\u062F"],
+	    "ring": ["\u0689"],
+	    "dot_below": ["\u068A"],
+	    "dot_below_small_tah": ["\u068B"],
+	    "three_dots_above_downwards": ["\u068F"],
+	    "four_dots_above": ["\u0690"],
+	    "inverted_v": ["\u06EE"],
+	    "two_dots_vertically_below_small_tah": ["\u0759"],
+	    "inverted_small_v_below": ["\u075A"],
+	    "three_dots_below": ["\u08AE"],
+	    "isolated": "\uFEA9",
+	    "final": "\uFEAA"
+	  },
+	  "thal": {
+	    "normal": ["\u0630"],
+	    "isolated": "\uFEAB",
+	    "final": "\uFEAC"
+	  },
+	  "reh": {
+	    "normal": ["\u0631"],
+	    "small_v": ["\u0692"],
+	    "ring": ["\u0693"],
+	    "dot_below": ["\u0694"],
+	    "small_v_below": ["\u0695"],
+	    "dot_below_dot_above": ["\u0696"],
+	    "two_dots_above": ["\u0697"],
+	    "four_dots_above": ["\u0699"],
+	    "inverted_v": ["\u06EF"],
+	    "stroke": ["\u075B"],
+	    "two_dots_vertically_above": ["\u076B"],
+	    "hamza_above": ["\u076C"],
+	    "small_tah_two_dots": ["\u0771"],
+	    "loop": ["\u08AA"],
+	    "small_noon_above": ["\u08B9"],
+	    "isolated": "\uFEAD",
+	    "final": "\uFEAE"
+	  },
+	  "zain": {
+	    "normal": ["\u0632"],
+	    "inverted_v_above": ["\u08B2"],
+	    "isolated": "\uFEAF",
+	    "final": "\uFEB0"
+	  },
+	  "seen": {
+	    "normal": ["\u0633"],
+	    "dot_below_dot_above": ["\u069A"],
+	    "three_dots_below": ["\u069B"],
+	    "three_dots_below_three_dots_above": ["\u069C"],
+	    "four_dots_above": ["\u075C"],
+	    "two_dots_vertically_above": ["\u076D"],
+	    "small_tah_two_dots": ["\u0770"],
+	    "indic_four_above": ["\u077D"],
+	    "inverted_v": ["\u077E"],
+	    "isolated": "\uFEB1",
+	    "final": "\uFEB2",
+	    "initial": "\uFEB3",
+	    "medial": "\uFEB4"
+	  },
+	  "sheen": {
+	    "normal": ["\u0634"],
+	    "dot_below": ["\u06FA"],
+	    "isolated": "\uFEB5",
+	    "final": "\uFEB6",
+	    "initial": "\uFEB7",
+	    "medial": "\uFEB8"
+	  },
+	  "sad": {
+	    "normal": ["\u0635"],
+	    "two_dots_below": ["\u069D"],
+	    "three_dots_above": ["\u069E"],
+	    "three_dots_below": ["\u08AF"],
+	    "isolated": "\uFEB9",
+	    "final": "\uFEBA",
+	    "initial": "\uFEBB",
+	    "medial": "\uFEBC"
+	  },
+	  "dad": {
+	    "normal": ["\u0636"],
+	    "dot_below": ["\u06FB"],
+	    "isolated": "\uFEBD",
+	    "final": "\uFEBE",
+	    "initial": "\uFEBF",
+	    "medial": "\uFEC0"
+	  },
+	  "tah": {
+	    "normal": ["\u0637"],
+	    "three_dots_above": ["\u069F"],
+	    "two_dots_above": ["\u08A3"],
+	    "isolated": "\uFEC1",
+	    "final": "\uFEC2",
+	    "initial": "\uFEC3",
+	    "medial": "\uFEC4"
+	  },
+	  "zah": {
+	    "normal": ["\u0638"],
+	    "isolated": "\uFEC5",
+	    "final": "\uFEC6",
+	    "initial": "\uFEC7",
+	    "medial": "\uFEC8"
+	  },
+	  "ain": {
+	    "normal": ["\u0639"],
+	    "three_dots_above": ["\u06A0"],
+	    "two_dots_above": ["\u075D"],
+	    "three_dots_pointing_downwards_above": ["\u075E"],
+	    "two_dots_vertically_above": ["\u075F"],
+	    "three_dots_below": ["\u08B3"],
+	    "isolated": "\uFEC9",
+	    "final": "\uFECA",
+	    "initial": "\uFECB",
+	    "medial": "\uFECC"
+	  },
+	  "ghain": {
+	    "normal": ["\u063A"],
+	    "dot_below": ["\u06FC"],
+	    "isolated": "\uFECD",
+	    "final": "\uFECE",
+	    "initial": "\uFECF",
+	    "medial": "\uFED0"
+	  },
+	  "feh": {
+	    "normal": ["\u0641"],
+	    "dotless": ["\u06A1"],
+	    "dot_moved_below": ["\u06A2"],
+	    "dot_below": ["\u06A3"],
+	    "three_dots_below": ["\u06A5"],
+	    "two_dots_below": ["\u0760"],
+	    "three_dots_pointing_upwards_below": ["\u0761"],
+	    "dot_below_three_dots_above": ["\u08A4"],
+	    "isolated": "\uFED1",
+	    "final": "\uFED2",
+	    "initial": "\uFED3",
+	    "medial": "\uFED4"
+	  },
+	  "qaf": {
+	    "normal": ["\u0642"],
+	    "dotless": ["\u066F"],
+	    "dot_above": ["\u06A7"],
+	    "three_dots_above": ["\u06A8"],
+	    "dot_below": ["\u08A5"],
+	    "isolated": "\uFED5",
+	    "final": "\uFED6",
+	    "initial": "\uFED7",
+	    "medial": "\uFED8"
+	  },
+	  "kaf": {
+	    "normal": ["\u0643"],
+	    "swash": ["\u06AA"],
+	    "ring": ["\u06AB"],
+	    "dot_above": ["\u06AC"],
+	    "three_dots_below": ["\u06AE"],
+	    "two_dots_above": ["\u077F"],
+	    "dot_below": ["\u08B4"],
+	    "isolated": "\uFED9",
+	    "final": "\uFEDA",
+	    "initial": "\uFEDB",
+	    "medial": "\uFEDC"
+	  },
+	  "lam": {
+	    "normal": ["\u0644"],
+	    "small_v": ["\u06B5"],
+	    "dot_above": ["\u06B6"],
+	    "three_dots_above": ["\u06B7"],
+	    "three_dots_below": ["\u06B8"],
+	    "bar": ["\u076A"],
+	    "double_bar": ["\u08A6"],
+	    "isolated": "\uFEDD",
+	    "final": "\uFEDE",
+	    "initial": "\uFEDF",
+	    "medial": "\uFEE0"
+	  },
+	  "meem": {
+	    "normal": ["\u0645"],
+	    "dot_above": ["\u0765"],
+	    "dot_below": ["\u0766"],
+	    "three_dots_above": ["\u08A7"],
+	    "isolated": "\uFEE1",
+	    "final": "\uFEE2",
+	    "initial": "\uFEE3",
+	    "medial": "\uFEE4"
+	  },
+	  "noon": {
+	    "normal": ["\u0646"],
+	    "dot_below": ["\u06B9"],
+	    "ring": ["\u06BC"],
+	    "three_dots_above": ["\u06BD"],
+	    "two_dots_below": ["\u0767"],
+	    "small_tah": ["\u0768"],
+	    "small_v": ["\u0769"],
+	    "isolated": "\uFEE5",
+	    "final": "\uFEE6",
+	    "initial": "\uFEE7",
+	    "medial": "\uFEE8"
+	  },
+	  "heh": {
+	    "normal": ["\u0647"],
+	    "isolated": "\uFEE9",
+	    "final": "\uFEEA",
+	    "initial": "\uFEEB",
+	    "medial": "\uFEEC"
+	  },
+	  "waw": {
+	    "normal": ["\u0648"],
+	    "hamza_above": {
+	      "normal": ["\u0624", "\u0648\u0654"],
+	      "isolated": "\uFE85",
+	      "final": "\uFE86"
+	    },
+	    "high_hamza": ["\u0676", "\u0648\u0674"],
+	    "ring": ["\u06C4"],
+	    "two_dots_above": ["\u06CA"],
+	    "dot_above": ["\u06CF"],
+	    "indic_two_above": ["\u0778"],
+	    "indic_three_above": ["\u0779"],
+	    "dot_within": ["\u08AB"],
+	    "isolated": "\uFEED",
+	    "final": "\uFEEE"
+	  },
+	  "alef_maksura": {
+	    "normal": ["\u0649"],
+	    "hamza_above": ["\u0626", "\u064A\u0654"],
+	    "initial": "\uFBE8",
+	    "medial": "\uFBE9",
+	    "isolated": "\uFEEF",
+	    "final": "\uFEF0"
+	  },
+	  "yeh": {
+	    "normal": ["\u064A"],
+	    "hamza_above": {
+	      "normal": ["\u0626", "\u0649\u0654"],
+	      "isolated": "\uFE89",
+	      "final": "\uFE8A",
+	      "initial": "\uFE8B",
+	      "medial": "\uFE8C"
+	    },
+	    "two_dots_below_hamza_above": ["\u08A8"],
+	    "high_hamza": ["\u0678", "\u064A\u0674"],
+	    "tail": ["\u06CD"],
+	    "small_v": ["\u06CE"],
+	    "three_dots_below": ["\u06D1"],
+	    "two_dots_below_dot_above": ["\u08A9"],
+	    "two_dots_below_small_noon_above": ["\u08BA"],
+	    "isolated": "\uFEF1",
+	    "final": "\uFEF2",
+	    "initial": "\uFEF3",
+	    "medial": "\uFEF4"
+	  },
+	  "tteh": {
+	    "normal": ["\u0679"],
+	    "isolated": "\uFB66",
+	    "final": "\uFB67",
+	    "initial": "\uFB68",
+	    "medial": "\uFB69"
+	  },
+	  "tteheh": {
+	    "normal": ["\u067A"],
+	    "isolated": "\uFB5E",
+	    "final": "\uFB5F",
+	    "initial": "\uFB60",
+	    "medial": "\uFB61"
+	  },
+	  "beeh": {
+	    "normal": ["\u067B"],
+	    "isolated": "\uFB52",
+	    "final": "\uFB53",
+	    "initial": "\uFB54",
+	    "medial": "\uFB55"
+	  },
+	  "peh": {
+	    "normal": ["\u067E"],
+	    "small_meem_above": ["\u08B7"],
+	    "isolated": "\uFB56",
+	    "final": "\uFB57",
+	    "initial": "\uFB58",
+	    "medial": "\uFB59"
+	  },
+	  "teheh": {
+	    "normal": ["\u067F"],
+	    "isolated": "\uFB62",
+	    "final": "\uFB63",
+	    "initial": "\uFB64",
+	    "medial": "\uFB65"
+	  },
+	  "beheh": {
+	    "normal": ["\u0680"],
+	    "isolated": "\uFB5A",
+	    "final": "\uFB5B",
+	    "initial": "\uFB5C",
+	    "medial": "\uFB5D"
+	  },
+	  "nyeh": {
+	    "normal": ["\u0683"],
+	    "isolated": "\uFB76",
+	    "final": "\uFB77",
+	    "initial": "\uFB78",
+	    "medial": "\uFB79"
+	  },
+	  "dyeh": {
+	    "normal": ["\u0684"],
+	    "isolated": "\uFB72",
+	    "final": "\uFB73",
+	    "initial": "\uFB74",
+	    "medial": "\uFB75"
+	  },
+	  "tcheh": {
+	    "normal": ["\u0686"],
+	    "dot_above": ["\u06BF"],
+	    "isolated": "\uFB7A",
+	    "final": "\uFB7B",
+	    "initial": "\uFB7C",
+	    "medial": "\uFB7D"
+	  },
+	  "tcheheh": {
+	    "normal": ["\u0687"],
+	    "isolated": "\uFB7E",
+	    "final": "\uFB7F",
+	    "initial": "\uFB80",
+	    "medial": "\uFB81"
+	  },
+	  "ddal": {
+	    "normal": ["\u0688"],
+	    "isolated": "\uFB88",
+	    "final": "\uFB89"
+	  },
+	  "dahal": {
+	    "normal": ["\u068C"],
+	    "isolated": "\uFB84",
+	    "final": "\uFB85"
+	  },
+	  "ddahal": {
+	    "normal": ["\u068D"],
+	    "isolated": "\uFB82",
+	    "final": "\uFB83"
+	  },
+	  "dul": {
+	    "normal": ["\u068F", "\u068E"],
+	    "isolated": "\uFB86",
+	    "final": "\uFB87"
+	  },
+	  "rreh": {
+	    "normal": ["\u0691"],
+	    "isolated": "\uFB8C",
+	    "final": "\uFB8D"
+	  },
+	  "jeh": {
+	    "normal": ["\u0698"],
+	    "isolated": "\uFB8A",
+	    "final": "\uFB8B"
+	  },
+	  "veh": {
+	    "normal": ["\u06A4"],
+	    "isolated": "\uFB6A",
+	    "final": "\uFB6B",
+	    "initial": "\uFB6C",
+	    "medial": "\uFB6D"
+	  },
+	  "peheh": {
+	    "normal": ["\u06A6"],
+	    "isolated": "\uFB6E",
+	    "final": "\uFB6F",
+	    "initial": "\uFB70",
+	    "medial": "\uFB71"
+	  },
+	  "keheh": {
+	    "normal": ["\u06A9"],
+	    "dot_above": ["\u0762"],
+	    "three_dots_above": ["\u0763"],
+	    "three_dots_pointing_upwards_below": ["\u0764"],
+	    "isolated": "\uFB8E",
+	    "final": "\uFB8F",
+	    "initial": "\uFB90",
+	    "medial": "\uFB91"
+	  },
+	  "ng": {
+	    "normal": ["\u06AD"],
+	    "isolated": "\uFBD3",
+	    "final": "\uFBD4",
+	    "initial": "\uFBD5",
+	    "medial": "\uFBD6"
+	  },
+	  "gaf": {
+	    "normal": ["\u06AF"],
+	    "ring": ["\u06B0"],
+	    "two_dots_below": ["\u06B2"],
+	    "three_dots_above": ["\u06B4"],
+	    "inverted_stroke": ["\u08B0"],
+	    "isolated": "\uFB92",
+	    "final": "\uFB93",
+	    "initial": "\uFB94",
+	    "medial": "\uFB95"
+	  },
+	  "ngoeh": {
+	    "normal": ["\u06B1"],
+	    "isolated": "\uFB9A",
+	    "final": "\uFB9B",
+	    "initial": "\uFB9C",
+	    "medial": "\uFB9D"
+	  },
+	  "gueh": {
+	    "normal": ["\u06B3"],
+	    "isolated": "\uFB96",
+	    "final": "\uFB97",
+	    "initial": "\uFB98",
+	    "medial": "\uFB99"
+	  },
+	  "noon ghunna": {
+	    "normal": ["\u06BA"],
+	    "isolated": "\uFB9E",
+	    "final": "\uFB9F"
+	  },
+	  "rnoon": {
+	    "normal": ["\u06BB"],
+	    "isolated": "\uFBA0",
+	    "final": "\uFBA1",
+	    "initial": "\uFBA2",
+	    "medial": "\uFBA3"
+	  },
+	  "heh doachashmee": {
+	    "normal": ["\u06BE"],
+	    "isolated": "\uFBAA",
+	    "final": "\uFBAB",
+	    "initial": "\uFBAC",
+	    "medial": "\uFBAD"
+	  },
+	  "heh goal": {
+	    "normal": ["\u06C1"],
+	    "hamza_above": ["\u06C1\u0654", "\u06C2"],
+	    "isolated": "\uFBA6",
+	    "final": "\uFBA7",
+	    "initial": "\uFBA8",
+	    "medial": "\uFBA9"
+	  },
+	  "teh marbuta goal": {
+	    "normal": ["\u06C3"]
+	  },
+	  "kirghiz oe": {
+	    "normal": ["\u06C5"],
+	    "isolated": "\uFBE0",
+	    "final": "\uFBE1"
+	  },
+	  "oe": {
+	    "normal": ["\u06C6"],
+	    "isolated": "\uFBD9",
+	    "final": "\uFBDA"
+	  },
+	  "u": {
+	    "normal": ["\u06C7"],
+	    "hamza_above": {
+	      "normal": ["\u0677", "\u06C7\u0674"],
+	      "isolated": "\uFBDD"
+	    },
+	    "isolated": "\uFBD7",
+	    "final": "\uFBD8"
+	  },
+	  "yu": {
+	    "normal": ["\u06C8"],
+	    "isolated": "\uFBDB",
+	    "final": "\uFBDC"
+	  },
+	  "kirghiz yu": {
+	    "normal": ["\u06C9"],
+	    "isolated": "\uFBE2",
+	    "final": "\uFBE3"
+	  },
+	  "ve": {
+	    "normal": ["\u06CB"],
+	    "isolated": "\uFBDE",
+	    "final": "\uFBDF"
+	  },
+	  "farsi yeh": {
+	    "normal": ["\u06CC"],
+	    "indic_two_above": ["\u0775"],
+	    "indic_three_above": ["\u0776"],
+	    "indic_four_above": ["\u0777"],
+	    "isolated": "\uFBFC",
+	    "final": "\uFBFD",
+	    "initial": "\uFBFE",
+	    "medial": "\uFBFF"
+	  },
+	  "e": {
+	    "normal": ["\u06D0"],
+	    "isolated": "\uFBE4",
+	    "final": "\uFBE5",
+	    "initial": "\uFBE6",
+	    "medial": "\uFBE7"
+	  },
+	  "yeh barree": {
+	    "normal": ["\u06D2"],
+	    "hamza_above": {
+	      "normal": ["\u06D2\u0654", "\u06D3"],
+	      "isolated": "\uFBB0",
+	      "final": "\uFBB1"
+	    },
+	    "indic_two_above": ["\u077A"],
+	    "indic_three_above": ["\u077B"],
+	    "isolated": "\uFBAE",
+	    "final": "\uFBAF"
+	  },
+	  "ae": {
+	    "normal": ["\u06D5"],
+	    "isolated": "\u06D5",
+	    "final": "\uFEEA",
+	    "yeh_above": {
+	      "normal": ["\u06C0", "\u06D5\u0654"],
+	      "isolated": "\uFBA4",
+	      "final": "\uFBA5"
+	    }
+	  },
+	  "rohingya yeh": {
+	    "normal": ["\u08AC"]
+	  },
+	  "low alef": {
+	    "normal": ["\u08AD"]
+	  },
+	  "straight waw": {
+	    "normal": ["\u08B1"]
+	  },
+	  "african feh": {
+	    "normal": ["\u08BB"]
+	  },
+	  "african qaf": {
+	    "normal": ["\u08BC"]
+	  },
+	  "african noon": {
+	    "normal": ["\u08BD"]
+	  }
+	};
 
-	        var extent = geoExtent();
-	        var oldGraph = context.copyGraph();
-	        var newIDs = [];
+	unicodeArabic["default"] = arabicReference;
 
-	        var action = actionCopyEntities(oldIDs, oldGraph);
-	        context.perform(action);
+	var unicodeLigatures = {};
 
-	        var copies = action.copies();
-	        var originals = new Set();
-	        Object.values(copies).forEach(function(entity) { originals.add(entity.id); });
+	Object.defineProperty(unicodeLigatures, "__esModule", {
+	  value: true
+	});
+	var ligatureReference = {
+	  "\u0626\u0627": {
+	    "isolated": "\uFBEA",
+	    "final": "\uFBEB"
+	  },
+	  "\u0626\u06D5": {
+	    "isolated": "\uFBEC",
+	    "final": "\uFBED"
+	  },
+	  "\u0626\u0648": {
+	    "isolated": "\uFBEE",
+	    "final": "\uFBEF"
+	  },
+	  "\u0626\u06C7": {
+	    "isolated": "\uFBF0",
+	    "final": "\uFBF1"
+	  },
+	  "\u0626\u06C6": {
+	    "isolated": "\uFBF2",
+	    "final": "\uFBF3"
+	  },
+	  "\u0626\u06C8": {
+	    "isolated": "\uFBF4",
+	    "final": "\uFBF5"
+	  },
+	  "\u0626\u06D0": {
+	    "isolated": "\uFBF6",
+	    "final": "\uFBF7",
+	    "initial": "\uFBF8"
+	  },
+	  "\u0626\u0649": {
+	    "uighur_kirghiz": {
+	      "isolated": "\uFBF9",
+	      "final": "\uFBFA",
+	      "initial": "\uFBFB"
+	    },
+	    "isolated": "\uFC03",
+	    "final": "\uFC68"
+	  },
+	  "\u0626\u062C": {
+	    "isolated": "\uFC00",
+	    "initial": "\uFC97"
+	  },
+	  "\u0626\u062D": {
+	    "isolated": "\uFC01",
+	    "initial": "\uFC98"
+	  },
+	  "\u0626\u0645": {
+	    "isolated": "\uFC02",
+	    "final": "\uFC66",
+	    "initial": "\uFC9A",
+	    "medial": "\uFCDF"
+	  },
+	  "\u0626\u064A": {
+	    "isolated": "\uFC04",
+	    "final": "\uFC69"
+	  },
+	  "\u0628\u062C": {
+	    "isolated": "\uFC05",
+	    "initial": "\uFC9C"
+	  },
+	  "\u0628\u062D": {
+	    "isolated": "\uFC06",
+	    "initial": "\uFC9D"
+	  },
+	  "\u0628\u062E": {
+	    "isolated": "\uFC07",
+	    "initial": "\uFC9E"
+	  },
+	  "\u0628\u0645": {
+	    "isolated": "\uFC08",
+	    "final": "\uFC6C",
+	    "initial": "\uFC9F",
+	    "medial": "\uFCE1"
+	  },
+	  "\u0628\u0649": {
+	    "isolated": "\uFC09",
+	    "final": "\uFC6E"
+	  },
+	  "\u0628\u064A": {
+	    "isolated": "\uFC0A",
+	    "final": "\uFC6F"
+	  },
+	  "\u062A\u062C": {
+	    "isolated": "\uFC0B",
+	    "initial": "\uFCA1"
+	  },
+	  "\u062A\u062D": {
+	    "isolated": "\uFC0C",
+	    "initial": "\uFCA2"
+	  },
+	  "\u062A\u062E": {
+	    "isolated": "\uFC0D",
+	    "initial": "\uFCA3"
+	  },
+	  "\u062A\u0645": {
+	    "isolated": "\uFC0E",
+	    "final": "\uFC72",
+	    "initial": "\uFCA4",
+	    "medial": "\uFCE3"
+	  },
+	  "\u062A\u0649": {
+	    "isolated": "\uFC0F",
+	    "final": "\uFC74"
+	  },
+	  "\u062A\u064A": {
+	    "isolated": "\uFC10",
+	    "final": "\uFC75"
+	  },
+	  "\u062B\u062C": {
+	    "isolated": "\uFC11"
+	  },
+	  "\u062B\u0645": {
+	    "isolated": "\uFC12",
+	    "final": "\uFC78",
+	    "initial": "\uFCA6",
+	    "medial": "\uFCE5"
+	  },
+	  "\u062B\u0649": {
+	    "isolated": "\uFC13",
+	    "final": "\uFC7A"
+	  },
+	  "\u062B\u0648": {
+	    "isolated": "\uFC14"
+	  },
+	  "\u062C\u062D": {
+	    "isolated": "\uFC15",
+	    "initial": "\uFCA7"
+	  },
+	  "\u062C\u0645": {
+	    "isolated": "\uFC16",
+	    "initial": "\uFCA8"
+	  },
+	  "\u062D\u062C": {
+	    "isolated": "\uFC17",
+	    "initial": "\uFCA9"
+	  },
+	  "\u062D\u0645": {
+	    "isolated": "\uFC18",
+	    "initial": "\uFCAA"
+	  },
+	  "\u062E\u062C": {
+	    "isolated": "\uFC19",
+	    "initial": "\uFCAB"
+	  },
+	  "\u062E\u062D": {
+	    "isolated": "\uFC1A"
+	  },
+	  "\u062E\u0645": {
+	    "isolated": "\uFC1B",
+	    "initial": "\uFCAC"
+	  },
+	  "\u0633\u062C": {
+	    "isolated": "\uFC1C",
+	    "initial": "\uFCAD",
+	    "medial": "\uFD34"
+	  },
+	  "\u0633\u062D": {
+	    "isolated": "\uFC1D",
+	    "initial": "\uFCAE",
+	    "medial": "\uFD35"
+	  },
+	  "\u0633\u062E": {
+	    "isolated": "\uFC1E",
+	    "initial": "\uFCAF",
+	    "medial": "\uFD36"
+	  },
+	  "\u0633\u0645": {
+	    "isolated": "\uFC1F",
+	    "initial": "\uFCB0",
+	    "medial": "\uFCE7"
+	  },
+	  "\u0635\u062D": {
+	    "isolated": "\uFC20",
+	    "initial": "\uFCB1"
+	  },
+	  "\u0635\u0645": {
+	    "isolated": "\uFC21",
+	    "initial": "\uFCB3"
+	  },
+	  "\u0636\u062C": {
+	    "isolated": "\uFC22",
+	    "initial": "\uFCB4"
+	  },
+	  "\u0636\u062D": {
+	    "isolated": "\uFC23",
+	    "initial": "\uFCB5"
+	  },
+	  "\u0636\u062E": {
+	    "isolated": "\uFC24",
+	    "initial": "\uFCB6"
+	  },
+	  "\u0636\u0645": {
+	    "isolated": "\uFC25",
+	    "initial": "\uFCB7"
+	  },
+	  "\u0637\u062D": {
+	    "isolated": "\uFC26",
+	    "initial": "\uFCB8"
+	  },
+	  "\u0637\u0645": {
+	    "isolated": "\uFC27",
+	    "initial": "\uFD33",
+	    "medial": "\uFD3A"
+	  },
+	  "\u0638\u0645": {
+	    "isolated": "\uFC28",
+	    "initial": "\uFCB9",
+	    "medial": "\uFD3B"
+	  },
+	  "\u0639\u062C": {
+	    "isolated": "\uFC29",
+	    "initial": "\uFCBA"
+	  },
+	  "\u0639\u0645": {
+	    "isolated": "\uFC2A",
+	    "initial": "\uFCBB"
+	  },
+	  "\u063A\u062C": {
+	    "isolated": "\uFC2B",
+	    "initial": "\uFCBC"
+	  },
+	  "\u063A\u0645": {
+	    "isolated": "\uFC2C",
+	    "initial": "\uFCBD"
+	  },
+	  "\u0641\u062C": {
+	    "isolated": "\uFC2D",
+	    "initial": "\uFCBE"
+	  },
+	  "\u0641\u062D": {
+	    "isolated": "\uFC2E",
+	    "initial": "\uFCBF"
+	  },
+	  "\u0641\u062E": {
+	    "isolated": "\uFC2F",
+	    "initial": "\uFCC0"
+	  },
+	  "\u0641\u0645": {
+	    "isolated": "\uFC30",
+	    "initial": "\uFCC1"
+	  },
+	  "\u0641\u0649": {
+	    "isolated": "\uFC31",
+	    "final": "\uFC7C"
+	  },
+	  "\u0641\u064A": {
+	    "isolated": "\uFC32",
+	    "final": "\uFC7D"
+	  },
+	  "\u0642\u062D": {
+	    "isolated": "\uFC33",
+	    "initial": "\uFCC2"
+	  },
+	  "\u0642\u0645": {
+	    "isolated": "\uFC34",
+	    "initial": "\uFCC3"
+	  },
+	  "\u0642\u0649": {
+	    "isolated": "\uFC35",
+	    "final": "\uFC7E"
+	  },
+	  "\u0642\u064A": {
+	    "isolated": "\uFC36",
+	    "final": "\uFC7F"
+	  },
+	  "\u0643\u0627": {
+	    "isolated": "\uFC37",
+	    "final": "\uFC80"
+	  },
+	  "\u0643\u062C": {
+	    "isolated": "\uFC38",
+	    "initial": "\uFCC4"
+	  },
+	  "\u0643\u062D": {
+	    "isolated": "\uFC39",
+	    "initial": "\uFCC5"
+	  },
+	  "\u0643\u062E": {
+	    "isolated": "\uFC3A",
+	    "initial": "\uFCC6"
+	  },
+	  "\u0643\u0644": {
+	    "isolated": "\uFC3B",
+	    "final": "\uFC81",
+	    "initial": "\uFCC7",
+	    "medial": "\uFCEB"
+	  },
+	  "\u0643\u0645": {
+	    "isolated": "\uFC3C",
+	    "final": "\uFC82",
+	    "initial": "\uFCC8",
+	    "medial": "\uFCEC"
+	  },
+	  "\u0643\u0649": {
+	    "isolated": "\uFC3D",
+	    "final": "\uFC83"
+	  },
+	  "\u0643\u064A": {
+	    "isolated": "\uFC3E",
+	    "final": "\uFC84"
+	  },
+	  "\u0644\u062C": {
+	    "isolated": "\uFC3F",
+	    "initial": "\uFCC9"
+	  },
+	  "\u0644\u062D": {
+	    "isolated": "\uFC40",
+	    "initial": "\uFCCA"
+	  },
+	  "\u0644\u062E": {
+	    "isolated": "\uFC41",
+	    "initial": "\uFCCB"
+	  },
+	  "\u0644\u0645": {
+	    "isolated": "\uFC42",
+	    "final": "\uFC85",
+	    "initial": "\uFCCC",
+	    "medial": "\uFCED"
+	  },
+	  "\u0644\u0649": {
+	    "isolated": "\uFC43",
+	    "final": "\uFC86"
+	  },
+	  "\u0644\u064A": {
+	    "isolated": "\uFC44",
+	    "final": "\uFC87"
+	  },
+	  "\u0645\u062C": {
+	    "isolated": "\uFC45",
+	    "initial": "\uFCCE"
+	  },
+	  "\u0645\u062D": {
+	    "isolated": "\uFC46",
+	    "initial": "\uFCCF"
+	  },
+	  "\u0645\u062E": {
+	    "isolated": "\uFC47",
+	    "initial": "\uFCD0"
+	  },
+	  "\u0645\u0645": {
+	    "isolated": "\uFC48",
+	    "final": "\uFC89",
+	    "initial": "\uFCD1"
+	  },
+	  "\u0645\u0649": {
+	    "isolated": "\uFC49"
+	  },
+	  "\u0645\u064A": {
+	    "isolated": "\uFC4A"
+	  },
+	  "\u0646\u062C": {
+	    "isolated": "\uFC4B",
+	    "initial": "\uFCD2"
+	  },
+	  "\u0646\u062D": {
+	    "isolated": "\uFC4C",
+	    "initial": "\uFCD3"
+	  },
+	  "\u0646\u062E": {
+	    "isolated": "\uFC4D",
+	    "initial": "\uFCD4"
+	  },
+	  "\u0646\u0645": {
+	    "isolated": "\uFC4E",
+	    "final": "\uFC8C",
+	    "initial": "\uFCD5",
+	    "medial": "\uFCEE"
+	  },
+	  "\u0646\u0649": {
+	    "isolated": "\uFC4F",
+	    "final": "\uFC8E"
+	  },
+	  "\u0646\u064A": {
+	    "isolated": "\uFC50",
+	    "final": "\uFC8F"
+	  },
+	  "\u0647\u062C": {
+	    "isolated": "\uFC51",
+	    "initial": "\uFCD7"
+	  },
+	  "\u0647\u0645": {
+	    "isolated": "\uFC52",
+	    "initial": "\uFCD8"
+	  },
+	  "\u0647\u0649": {
+	    "isolated": "\uFC53"
+	  },
+	  "\u0647\u064A": {
+	    "isolated": "\uFC54"
+	  },
+	  "\u064A\u062C": {
+	    "isolated": "\uFC55",
+	    "initial": "\uFCDA"
+	  },
+	  "\u064A\u062D": {
+	    "isolated": "\uFC56",
+	    "initial": "\uFCDB"
+	  },
+	  "\u064A\u062E": {
+	    "isolated": "\uFC57",
+	    "initial": "\uFCDC"
+	  },
+	  "\u064A\u0645": {
+	    "isolated": "\uFC58",
+	    "final": "\uFC93",
+	    "initial": "\uFCDD",
+	    "medial": "\uFCF0"
+	  },
+	  "\u064A\u0649": {
+	    "isolated": "\uFC59",
+	    "final": "\uFC95"
+	  },
+	  "\u064A\u064A": {
+	    "isolated": "\uFC5A",
+	    "final": "\uFC96"
+	  },
+	  "\u0630\u0670": {
+	    "isolated": "\uFC5B"
+	  },
+	  "\u0631\u0670": {
+	    "isolated": "\uFC5C"
+	  },
+	  "\u0649\u0670": {
+	    "isolated": "\uFC5D",
+	    "final": "\uFC90"
+	  },
+	  "\u064C\u0651": {
+	    "isolated": "\uFC5E"
+	  },
+	  "\u064D\u0651": {
+	    "isolated": "\uFC5F"
+	  },
+	  "\u064E\u0651": {
+	    "isolated": "\uFC60"
+	  },
+	  "\u064F\u0651": {
+	    "isolated": "\uFC61"
+	  },
+	  "\u0650\u0651": {
+	    "isolated": "\uFC62"
+	  },
+	  "\u0651\u0670": {
+	    "isolated": "\uFC63"
+	  },
+	  "\u0626\u0631": {
+	    "final": "\uFC64"
+	  },
+	  "\u0626\u0632": {
+	    "final": "\uFC65"
+	  },
+	  "\u0626\u0646": {
+	    "final": "\uFC67"
+	  },
+	  "\u0628\u0631": {
+	    "final": "\uFC6A"
+	  },
+	  "\u0628\u0632": {
+	    "final": "\uFC6B"
+	  },
+	  "\u0628\u0646": {
+	    "final": "\uFC6D"
+	  },
+	  "\u062A\u0631": {
+	    "final": "\uFC70"
+	  },
+	  "\u062A\u0632": {
+	    "final": "\uFC71"
+	  },
+	  "\u062A\u0646": {
+	    "final": "\uFC73"
+	  },
+	  "\u062B\u0631": {
+	    "final": "\uFC76"
+	  },
+	  "\u062B\u0632": {
+	    "final": "\uFC77"
+	  },
+	  "\u062B\u0646": {
+	    "final": "\uFC79"
+	  },
+	  "\u062B\u064A": {
+	    "final": "\uFC7B"
+	  },
+	  "\u0645\u0627": {
+	    "final": "\uFC88"
+	  },
+	  "\u0646\u0631": {
+	    "final": "\uFC8A"
+	  },
+	  "\u0646\u0632": {
+	    "final": "\uFC8B"
+	  },
+	  "\u0646\u0646": {
+	    "final": "\uFC8D"
+	  },
+	  "\u064A\u0631": {
+	    "final": "\uFC91"
+	  },
+	  "\u064A\u0632": {
+	    "final": "\uFC92"
+	  },
+	  "\u064A\u0646": {
+	    "final": "\uFC94"
+	  },
+	  "\u0626\u062E": {
+	    "initial": "\uFC99"
+	  },
+	  "\u0626\u0647": {
+	    "initial": "\uFC9B",
+	    "medial": "\uFCE0"
+	  },
+	  "\u0628\u0647": {
+	    "initial": "\uFCA0",
+	    "medial": "\uFCE2"
+	  },
+	  "\u062A\u0647": {
+	    "initial": "\uFCA5",
+	    "medial": "\uFCE4"
+	  },
+	  "\u0635\u062E": {
+	    "initial": "\uFCB2"
+	  },
+	  "\u0644\u0647": {
+	    "initial": "\uFCCD"
+	  },
+	  "\u0646\u0647": {
+	    "initial": "\uFCD6",
+	    "medial": "\uFCEF"
+	  },
+	  "\u0647\u0670": {
+	    "initial": "\uFCD9"
+	  },
+	  "\u064A\u0647": {
+	    "initial": "\uFCDE",
+	    "medial": "\uFCF1"
+	  },
+	  "\u062B\u0647": {
+	    "medial": "\uFCE6"
+	  },
+	  "\u0633\u0647": {
+	    "medial": "\uFCE8",
+	    "initial": "\uFD31"
+	  },
+	  "\u0634\u0645": {
+	    "medial": "\uFCE9",
+	    "isolated": "\uFD0C",
+	    "final": "\uFD28",
+	    "initial": "\uFD30"
+	  },
+	  "\u0634\u0647": {
+	    "medial": "\uFCEA",
+	    "initial": "\uFD32"
+	  },
+	  "\u0640\u064E\u0651": {
+	    "medial": "\uFCF2"
+	  },
+	  "\u0640\u064F\u0651": {
+	    "medial": "\uFCF3"
+	  },
+	  "\u0640\u0650\u0651": {
+	    "medial": "\uFCF4"
+	  },
+	  "\u0637\u0649": {
+	    "isolated": "\uFCF5",
+	    "final": "\uFD11"
+	  },
+	  "\u0637\u064A": {
+	    "isolated": "\uFCF6",
+	    "final": "\uFD12"
+	  },
+	  "\u0639\u0649": {
+	    "isolated": "\uFCF7",
+	    "final": "\uFD13"
+	  },
+	  "\u0639\u064A": {
+	    "isolated": "\uFCF8",
+	    "final": "\uFD14"
+	  },
+	  "\u063A\u0649": {
+	    "isolated": "\uFCF9",
+	    "final": "\uFD15"
+	  },
+	  "\u063A\u064A": {
+	    "isolated": "\uFCFA",
+	    "final": "\uFD16"
+	  },
+	  "\u0633\u0649": {
+	    "isolated": "\uFCFB"
+	  },
+	  "\u0633\u064A": {
+	    "isolated": "\uFCFC",
+	    "final": "\uFD18"
+	  },
+	  "\u0634\u0649": {
+	    "isolated": "\uFCFD",
+	    "final": "\uFD19"
+	  },
+	  "\u0634\u064A": {
+	    "isolated": "\uFCFE",
+	    "final": "\uFD1A"
+	  },
+	  "\u062D\u0649": {
+	    "isolated": "\uFCFF",
+	    "final": "\uFD1B"
+	  },
+	  "\u062D\u064A": {
+	    "isolated": "\uFD00",
+	    "final": "\uFD1C"
+	  },
+	  "\u062C\u0649": {
+	    "isolated": "\uFD01",
+	    "final": "\uFD1D"
+	  },
+	  "\u062C\u064A": {
+	    "isolated": "\uFD02",
+	    "final": "\uFD1E"
+	  },
+	  "\u062E\u0649": {
+	    "isolated": "\uFD03",
+	    "final": "\uFD1F"
+	  },
+	  "\u062E\u064A": {
+	    "isolated": "\uFD04",
+	    "final": "\uFD20"
+	  },
+	  "\u0635\u0649": {
+	    "isolated": "\uFD05",
+	    "final": "\uFD21"
+	  },
+	  "\u0635\u064A": {
+	    "isolated": "\uFD06",
+	    "final": "\uFD22"
+	  },
+	  "\u0636\u0649": {
+	    "isolated": "\uFD07",
+	    "final": "\uFD23"
+	  },
+	  "\u0636\u064A": {
+	    "isolated": "\uFD08",
+	    "final": "\uFD24"
+	  },
+	  "\u0634\u062C": {
+	    "isolated": "\uFD09",
+	    "final": "\uFD25",
+	    "initial": "\uFD2D",
+	    "medial": "\uFD37"
+	  },
+	  "\u0634\u062D": {
+	    "isolated": "\uFD0A",
+	    "final": "\uFD26",
+	    "initial": "\uFD2E",
+	    "medial": "\uFD38"
+	  },
+	  "\u0634\u062E": {
+	    "isolated": "\uFD0B",
+	    "final": "\uFD27",
+	    "initial": "\uFD2F",
+	    "medial": "\uFD39"
+	  },
+	  "\u0634\u0631": {
+	    "isolated": "\uFD0D",
+	    "final": "\uFD29"
+	  },
+	  "\u0633\u0631": {
+	    "isolated": "\uFD0E",
+	    "final": "\uFD2A"
+	  },
+	  "\u0635\u0631": {
+	    "isolated": "\uFD0F",
+	    "final": "\uFD2B"
+	  },
+	  "\u0636\u0631": {
+	    "isolated": "\uFD10",
+	    "final": "\uFD2C"
+	  },
+	  "\u0633\u0639": {
+	    "final": "\uFD17"
+	  },
+	  "\u062A\u062C\u0645": {
+	    "initial": "\uFD50"
+	  },
+	  "\u062A\u062D\u062C": {
+	    "final": "\uFD51",
+	    "initial": "\uFD52"
+	  },
+	  "\u062A\u062D\u0645": {
+	    "initial": "\uFD53"
+	  },
+	  "\u062A\u062E\u0645": {
+	    "initial": "\uFD54"
+	  },
+	  "\u062A\u0645\u062C": {
+	    "initial": "\uFD55"
+	  },
+	  "\u062A\u0645\u062D": {
+	    "initial": "\uFD56"
+	  },
+	  "\u062A\u0645\u062E": {
+	    "initial": "\uFD57"
+	  },
+	  "\u062C\u0645\u062D": {
+	    "final": "\uFD58",
+	    "initial": "\uFD59"
+	  },
+	  "\u062D\u0645\u064A": {
+	    "final": "\uFD5A"
+	  },
+	  "\u062D\u0645\u0649": {
+	    "final": "\uFD5B"
+	  },
+	  "\u0633\u062D\u062C": {
+	    "initial": "\uFD5C"
+	  },
+	  "\u0633\u062C\u062D": {
+	    "initial": "\uFD5D"
+	  },
+	  "\u0633\u062C\u0649": {
+	    "final": "\uFD5E"
+	  },
+	  "\u0633\u0645\u062D": {
+	    "final": "\uFD5F",
+	    "initial": "\uFD60"
+	  },
+	  "\u0633\u0645\u062C": {
+	    "initial": "\uFD61"
+	  },
+	  "\u0633\u0645\u0645": {
+	    "final": "\uFD62",
+	    "initial": "\uFD63"
+	  },
+	  "\u0635\u062D\u062D": {
+	    "final": "\uFD64",
+	    "initial": "\uFD65"
+	  },
+	  "\u0635\u0645\u0645": {
+	    "final": "\uFD66",
+	    "initial": "\uFDC5"
+	  },
+	  "\u0634\u062D\u0645": {
+	    "final": "\uFD67",
+	    "initial": "\uFD68"
+	  },
+	  "\u0634\u062C\u064A": {
+	    "final": "\uFD69"
+	  },
+	  "\u0634\u0645\u062E": {
+	    "final": "\uFD6A",
+	    "initial": "\uFD6B"
+	  },
+	  "\u0634\u0645\u0645": {
+	    "final": "\uFD6C",
+	    "initial": "\uFD6D"
+	  },
+	  "\u0636\u062D\u0649": {
+	    "final": "\uFD6E"
+	  },
+	  "\u0636\u062E\u0645": {
+	    "final": "\uFD6F",
+	    "initial": "\uFD70"
+	  },
+	  "\u0636\u0645\u062D": {
+	    "final": "\uFD71"
+	  },
+	  "\u0637\u0645\u062D": {
+	    "initial": "\uFD72"
+	  },
+	  "\u0637\u0645\u0645": {
+	    "initial": "\uFD73"
+	  },
+	  "\u0637\u0645\u064A": {
+	    "final": "\uFD74"
+	  },
+	  "\u0639\u062C\u0645": {
+	    "final": "\uFD75",
+	    "initial": "\uFDC4"
+	  },
+	  "\u0639\u0645\u0645": {
+	    "final": "\uFD76",
+	    "initial": "\uFD77"
+	  },
+	  "\u0639\u0645\u0649": {
+	    "final": "\uFD78"
+	  },
+	  "\u063A\u0645\u0645": {
+	    "final": "\uFD79"
+	  },
+	  "\u063A\u0645\u064A": {
+	    "final": "\uFD7A"
+	  },
+	  "\u063A\u0645\u0649": {
+	    "final": "\uFD7B"
+	  },
+	  "\u0641\u062E\u0645": {
+	    "final": "\uFD7C",
+	    "initial": "\uFD7D"
+	  },
+	  "\u0642\u0645\u062D": {
+	    "final": "\uFD7E",
+	    "initial": "\uFDB4"
+	  },
+	  "\u0642\u0645\u0645": {
+	    "final": "\uFD7F"
+	  },
+	  "\u0644\u062D\u0645": {
+	    "final": "\uFD80",
+	    "initial": "\uFDB5"
+	  },
+	  "\u0644\u062D\u064A": {
+	    "final": "\uFD81"
+	  },
+	  "\u0644\u062D\u0649": {
+	    "final": "\uFD82"
+	  },
+	  "\u0644\u062C\u062C": {
+	    "initial": "\uFD83",
+	    "final": "\uFD84"
+	  },
+	  "\u0644\u062E\u0645": {
+	    "final": "\uFD85",
+	    "initial": "\uFD86"
+	  },
+	  "\u0644\u0645\u062D": {
+	    "final": "\uFD87",
+	    "initial": "\uFD88"
+	  },
+	  "\u0645\u062D\u062C": {
+	    "initial": "\uFD89"
+	  },
+	  "\u0645\u062D\u0645": {
+	    "initial": "\uFD8A"
+	  },
+	  "\u0645\u062D\u064A": {
+	    "final": "\uFD8B"
+	  },
+	  "\u0645\u062C\u062D": {
+	    "initial": "\uFD8C"
+	  },
+	  "\u0645\u062C\u0645": {
+	    "initial": "\uFD8D"
+	  },
+	  "\u0645\u062E\u062C": {
+	    "initial": "\uFD8E"
+	  },
+	  "\u0645\u062E\u0645": {
+	    "initial": "\uFD8F"
+	  },
+	  "\u0645\u062C\u062E": {
+	    "initial": "\uFD92"
+	  },
+	  "\u0647\u0645\u062C": {
+	    "initial": "\uFD93"
+	  },
+	  "\u0647\u0645\u0645": {
+	    "initial": "\uFD94"
+	  },
+	  "\u0646\u062D\u0645": {
+	    "initial": "\uFD95"
+	  },
+	  "\u0646\u062D\u0649": {
+	    "final": "\uFD96"
+	  },
+	  "\u0646\u062C\u0645": {
+	    "final": "\uFD97",
+	    "initial": "\uFD98"
+	  },
+	  "\u0646\u062C\u0649": {
+	    "final": "\uFD99"
+	  },
+	  "\u0646\u0645\u064A": {
+	    "final": "\uFD9A"
+	  },
+	  "\u0646\u0645\u0649": {
+	    "final": "\uFD9B"
+	  },
+	  "\u064A\u0645\u0645": {
+	    "final": "\uFD9C",
+	    "initial": "\uFD9D"
+	  },
+	  "\u0628\u062E\u064A": {
+	    "final": "\uFD9E"
+	  },
+	  "\u062A\u062C\u064A": {
+	    "final": "\uFD9F"
+	  },
+	  "\u062A\u062C\u0649": {
+	    "final": "\uFDA0"
+	  },
+	  "\u062A\u062E\u064A": {
+	    "final": "\uFDA1"
+	  },
+	  "\u062A\u062E\u0649": {
+	    "final": "\uFDA2"
+	  },
+	  "\u062A\u0645\u064A": {
+	    "final": "\uFDA3"
+	  },
+	  "\u062A\u0645\u0649": {
+	    "final": "\uFDA4"
+	  },
+	  "\u062C\u0645\u064A": {
+	    "final": "\uFDA5"
+	  },
+	  "\u062C\u062D\u0649": {
+	    "final": "\uFDA6"
+	  },
+	  "\u062C\u0645\u0649": {
+	    "final": "\uFDA7"
+	  },
+	  "\u0633\u062E\u0649": {
+	    "final": "\uFDA8"
+	  },
+	  "\u0635\u062D\u064A": {
+	    "final": "\uFDA9"
+	  },
+	  "\u0634\u062D\u064A": {
+	    "final": "\uFDAA"
+	  },
+	  "\u0636\u062D\u064A": {
+	    "final": "\uFDAB"
+	  },
+	  "\u0644\u062C\u064A": {
+	    "final": "\uFDAC"
+	  },
+	  "\u0644\u0645\u064A": {
+	    "final": "\uFDAD"
+	  },
+	  "\u064A\u062D\u064A": {
+	    "final": "\uFDAE"
+	  },
+	  "\u064A\u062C\u064A": {
+	    "final": "\uFDAF"
+	  },
+	  "\u064A\u0645\u064A": {
+	    "final": "\uFDB0"
+	  },
+	  "\u0645\u0645\u064A": {
+	    "final": "\uFDB1"
+	  },
+	  "\u0642\u0645\u064A": {
+	    "final": "\uFDB2"
+	  },
+	  "\u0646\u062D\u064A": {
+	    "final": "\uFDB3"
+	  },
+	  "\u0639\u0645\u064A": {
+	    "final": "\uFDB6"
+	  },
+	  "\u0643\u0645\u064A": {
+	    "final": "\uFDB7"
+	  },
+	  "\u0646\u062C\u062D": {
+	    "initial": "\uFDB8",
+	    "final": "\uFDBD"
+	  },
+	  "\u0645\u062E\u064A": {
+	    "final": "\uFDB9"
+	  },
+	  "\u0644\u062C\u0645": {
+	    "initial": "\uFDBA",
+	    "final": "\uFDBC"
+	  },
+	  "\u0643\u0645\u0645": {
+	    "final": "\uFDBB",
+	    "initial": "\uFDC3"
+	  },
+	  "\u062C\u062D\u064A": {
+	    "final": "\uFDBE"
+	  },
+	  "\u062D\u062C\u064A": {
+	    "final": "\uFDBF"
+	  },
+	  "\u0645\u062C\u064A": {
+	    "final": "\uFDC0"
+	  },
+	  "\u0641\u0645\u064A": {
+	    "final": "\uFDC1"
+	  },
+	  "\u0628\u062D\u064A": {
+	    "final": "\uFDC2"
+	  },
+	  "\u0633\u062E\u064A": {
+	    "final": "\uFDC6"
+	  },
+	  "\u0646\u062C\u064A": {
+	    "final": "\uFDC7"
+	  },
+	  "\u0644\u0622": {
+	    "isolated": "\uFEF5",
+	    "final": "\uFEF6"
+	  },
+	  "\u0644\u0623": {
+	    "isolated": "\uFEF7",
+	    "final": "\uFEF8"
+	  },
+	  "\u0644\u0625": {
+	    "isolated": "\uFEF9",
+	    "final": "\uFEFA"
+	  },
+	  "\u0644\u0627": {
+	    "isolated": "\uFEFB",
+	    "final": "\uFEFC"
+	  },
+	  "words": {
+	    "\u0635\u0644\u06D2": "\uFDF0",
+	    "\u0642\u0644\u06D2": "\uFDF1",
+	    "\u0627\u0644\u0644\u0647": "\uFDF2",
+	    "\u0627\u0643\u0628\u0631": "\uFDF3",
+	    "\u0645\u062D\u0645\u062F": "\uFDF4",
+	    "\u0635\u0644\u0639\u0645": "\uFDF5",
+	    "\u0631\u0633\u0648\u0644": "\uFDF6",
+	    "\u0639\u0644\u064A\u0647": "\uFDF7",
+	    "\u0648\u0633\u0644\u0645": "\uFDF8",
+	    "\u0635\u0644\u0649": "\uFDF9",
+	    "\u0635\u0644\u0649\u0627\u0644\u0644\u0647\u0639\u0644\u064A\u0647\u0648\u0633\u0644\u0645": "\uFDFA",
+	    "\u062C\u0644\u062C\u0644\u0627\u0644\u0647": "\uFDFB",
+	    "\u0631\u06CC\u0627\u0644": "\uFDFC"
+	  }
+	};
+
+	unicodeLigatures["default"] = ligatureReference;
+
+	Object.defineProperty(reference, "__esModule", {
+	  value: true
+	});
+	var unicode_arabic_1$3 = unicodeArabic;
+	var unicode_ligatures_1$2 = unicodeLigatures;
+	var letterList = Object.keys(unicode_arabic_1$3["default"]);
+	reference.letterList = letterList;
+	var ligatureList = Object.keys(unicode_ligatures_1$2["default"]);
+	reference.ligatureList = ligatureList;
+	var ligatureWordList = Object.keys(unicode_ligatures_1$2["default"].words);
+	reference.ligatureWordList = ligatureWordList;
+	var lams = "\u0644\u06B5\u06B6\u06B7\u06B8";
+	reference.lams = lams;
+	var alefs = "\u0627\u0622\u0623\u0625\u0671\u0672\u0673\u0675\u0773\u0774";
+	reference.alefs = alefs; // for (var l = 1; l < lams.length; l++) {
+	//   console.log('-');
+	//   for (var a = 0; a < alefs.length; a++) {
+	//     console.log(a + ': ' + lams[l] + alefs[a]);
+	//   }
+	// }
 
-	        for (var id in copies) {
-	            var oldEntity = oldGraph.entity(id);
-	            var newEntity = copies[id];
+	var tashkeel = "\u0605\u0640\u0670\u0674\u06DF\u06E7\u06E8";
+	reference.tashkeel = tashkeel;
 
-	            extent._extend(oldEntity.extent(oldGraph));
+	function addToTashkeel(start, finish) {
+	  for (var i = start; i <= finish; i++) {
+	    reference.tashkeel = tashkeel += String.fromCharCode(i);
+	  }
+	}
 
-	            // Exclude child nodes from newIDs if their parent way was also copied.
-	            var parents = context.graph().parentWays(newEntity);
-	            var parentCopied = parents.some(function(parent) {
-	                return originals.has(parent.id);
-	            });
+	addToTashkeel(0x0610, 0x061A);
+	addToTashkeel(0x064B, 0x065F);
+	addToTashkeel(0x06D6, 0x06DC);
+	addToTashkeel(0x06E0, 0x06E4);
+	addToTashkeel(0x06EA, 0x06ED);
+	addToTashkeel(0x08D3, 0x08E1);
+	addToTashkeel(0x08E3, 0x08FF);
+	addToTashkeel(0xFE70, 0xFE7F);
+	var lineBreakers = "\u0627\u0629\u0648\u06C0\u06CF\u06FD\u06FE\u076B\u076C\u0771\u0773\u0774\u0778\u0779\u08E2\u08B1\u08B2\u08B9";
+	reference.lineBreakers = lineBreakers;
 
-	            if (!parentCopied) {
-	                newIDs.push(newEntity.id);
-	            }
-	        }
+	function addToLineBreakers(start, finish) {
+	  for (var i = start; i <= finish; i++) {
+	    reference.lineBreakers = lineBreakers += String.fromCharCode(i);
+	  }
+	}
 
-	        // Put pasted objects where mouse pointer is..
-	        var copyPoint = (context.copyLonLat() && projection(context.copyLonLat())) || projection(extent.center());
-	        var delta = geoVecSubtract(mouse, copyPoint);
+	addToLineBreakers(0x0600, 0x061F); // it's OK to include tashkeel in this range as it is ignored
 
-	        context.perform(actionMove(newIDs, delta, projection));
-	        context.enter(modeMove(context, newIDs, baseGraph));
-	    }
+	addToLineBreakers(0x0621, 0x0625);
+	addToLineBreakers(0x062F, 0x0632);
+	addToLineBreakers(0x0660, 0x066D); // numerals, math
 
+	addToLineBreakers(0x0671, 0x0677);
+	addToLineBreakers(0x0688, 0x0699);
+	addToLineBreakers(0x06C3, 0x06CB);
+	addToLineBreakers(0x06D2, 0x06F9);
+	addToLineBreakers(0x0759, 0x075B);
+	addToLineBreakers(0x08AA, 0x08AE);
+	addToLineBreakers(0xFB50, 0xFDFD); // presentation forms look like they could connect, but never do
+	// Presentation Forms A includes diacritics but they are meant to stand alone
 
-	    function behavior() {
-	        context.keybinding().on(uiCmd('⌘V'), doPaste);
-	        return behavior;
-	    }
+	addToLineBreakers(0xFE80, 0xFEFC); // presentation forms look like they could connect, but never do
+	// numerals, math
 
+	addToLineBreakers(0x10E60, 0x10E7F);
+	addToLineBreakers(0x1EC70, 0x1ECBF);
+	addToLineBreakers(0x1EE00, 0x1EEFF);
 
-	    behavior.off = function() {
-	        context.keybinding().off(uiCmd('⌘V'));
-	    };
+	Object.defineProperty(GlyphSplitter$1, "__esModule", {
+	  value: true
+	});
+	var isArabic_1$6 = isArabic$1;
+	var reference_1$5 = reference;
 
+	function GlyphSplitter(word) {
+	  var letters = [];
+	  var lastLetter = '';
+	  word.split('').forEach(function (letter) {
+	    if (isArabic_1$6.isArabic(letter)) {
+	      if (reference_1$5.tashkeel.indexOf(letter) > -1) {
+	        letters[letters.length - 1] += letter;
+	      } else if (lastLetter.length && (reference_1$5.lams.indexOf(lastLetter) === 0 && reference_1$5.alefs.indexOf(letter) > -1 || reference_1$5.lams.indexOf(lastLetter) > 0 && reference_1$5.alefs.indexOf(letter) === 0)) {
+	        // valid LA forms
+	        letters[letters.length - 1] += letter;
+	      } else {
+	        letters.push(letter);
+	      }
+	    } else {
+	      letters.push(letter);
+	    }
 
-	    return behavior;
+	    if (reference_1$5.tashkeel.indexOf(letter) === -1) {
+	      lastLetter = letter;
+	    }
+	  });
+	  return letters;
 	}
 
-	/*
-	    `behaviorDrag` is like `d3_behavior.drag`, with the following differences:
-
-	    * The `origin` function is expected to return an [x, y] tuple rather than an
-	      {x, y} object.
-	    * The events are `start`, `move`, and `end`.
-	      (https://github.com/mbostock/d3/issues/563)
-	    * The `start` event is not dispatched until the first cursor movement occurs.
-	      (https://github.com/mbostock/d3/pull/368)
-	    * The `move` event has a `point` and `delta` [x, y] tuple properties rather
-	      than `x`, `y`, `dx`, and `dy` properties.
-	    * The `end` event is not dispatched if no movement occurs.
-	    * An `off` function is available that unbinds the drag's internal event handlers.
-	 */
+	GlyphSplitter$1.GlyphSplitter = GlyphSplitter;
 
-	function behaviorDrag() {
-	    var dispatch$1 = dispatch('start', 'move', 'end');
-
-	    // see also behaviorSelect
-	    var _tolerancePx = 1; // keep this low to facilitate pixel-perfect micromapping
-	    var _penTolerancePx = 4; // styluses can be touchy so require greater movement - #1981
-
-	    var _origin = null;
-	    var _selector = '';
-	    var _event;
-	    var _target;
-	    var _surface;
-	    var _pointerId;
-
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
-
-	    var d3_event_userSelectProperty = utilPrefixCSSProperty('UserSelect');
-	    var d3_event_userSelectSuppress = function() {
-	            var selection$1 = selection();
-	            var select = selection$1.style(d3_event_userSelectProperty);
-	            selection$1.style(d3_event_userSelectProperty, 'none');
-	            return function() {
-	                selection$1.style(d3_event_userSelectProperty, select);
-	            };
-	        };
+	var BaselineSplitter$1 = {};
 
+	Object.defineProperty(BaselineSplitter$1, "__esModule", {
+	  value: true
+	});
+	var isArabic_1$5 = isArabic$1;
+	var reference_1$4 = reference;
 
-	    function eventOf(thiz, argumentz) {
-	        return function(e1) {
-	            e1.target = behavior;
-	            customEvent(e1, dispatch$1.apply, dispatch$1, [e1.type, thiz, argumentz]);
-	        };
+	function BaselineSplitter(word) {
+	  var letters = [];
+	  var lastLetter = '';
+	  word.split('').forEach(function (letter) {
+	    if (isArabic_1$5.isArabic(letter) && isArabic_1$5.isArabic(lastLetter)) {
+	      if (lastLetter.length && reference_1$4.tashkeel.indexOf(letter) > -1) {
+	        letters[letters.length - 1] += letter;
+	      } else if (reference_1$4.lineBreakers.indexOf(lastLetter) > -1) {
+	        letters.push(letter);
+	      } else {
+	        letters[letters.length - 1] += letter;
+	      }
+	    } else {
+	      letters.push(letter);
 	    }
 
+	    if (reference_1$4.tashkeel.indexOf(letter) === -1) {
+	      // don't allow tashkeel to hide line break
+	      lastLetter = letter;
+	    }
+	  });
+	  return letters;
+	}
 
-	    function pointerdown() {
-
-	        if (_pointerId) { return; }
+	BaselineSplitter$1.BaselineSplitter = BaselineSplitter;
 
-	        _pointerId = event.pointerId || 'mouse';
+	var Normalization = {};
 
-	        _target = this;
-	        _event = eventOf(_target, arguments);
+	Object.defineProperty(Normalization, "__esModule", {
+	  value: true
+	});
+	var unicode_arabic_1$2 = unicodeArabic;
+	var unicode_ligatures_1$1 = unicodeLigatures;
+	var isArabic_1$4 = isArabic$1;
+	var reference_1$3 = reference;
 
-	        // only force reflow once per drag
-	        var pointerLocGetter = utilFastMouse(_surface || _target.parentNode);
+	function Normal(word, breakPresentationForm) {
+	  // default is to turn initial/isolated/medial/final presentation form to generic
+	  if (typeof breakPresentationForm === 'undefined') {
+	    breakPresentationForm = true;
+	  }
 
-	        var offset;
-	        var startOrigin = pointerLocGetter(event);
-	        var started = false;
-	        var selectEnable = d3_event_userSelectSuppress();
+	  var returnable = '';
+	  word.split('').forEach(function (letter) {
+	    if (!isArabic_1$4.isArabic(letter)) {
+	      returnable += letter;
+	      return;
+	    }
 
-	        select(window)
-	            .on(_pointerPrefix + 'move.drag', pointermove)
-	            .on(_pointerPrefix + 'up.drag pointercancel.drag', pointerup, true);
+	    for (var w = 0; w < reference_1$3.letterList.length; w++) {
+	      // ok so we are checking this potential lettertron
+	      var letterForms = unicode_arabic_1$2["default"][reference_1$3.letterList[w]];
+	      var versions = Object.keys(letterForms);
 
-	        if (_origin) {
-	            offset = _origin.apply(_target, arguments);
-	            offset = [offset[0] - startOrigin[0], offset[1] - startOrigin[1]];
-	        } else {
-	            offset = [0, 0];
-	        }
+	      for (var v = 0; v < versions.length; v++) {
+	        var localVersion = letterForms[versions[v]];
 
-	        event.stopPropagation();
+	        if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
+	          // look at this embedded object
+	          var embeddedForms = Object.keys(localVersion);
 
+	          for (var ef = 0; ef < embeddedForms.length; ef++) {
+	            var form = localVersion[embeddedForms[ef]];
 
-	        function pointermove() {
-	            if (_pointerId !== (event.pointerId || 'mouse')) { return; }
+	            if (form === letter || _typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
+	              // match
+	              // console.log('embedded match');
+	              if (form === letter) {
+	                // match exact
+	                if (breakPresentationForm && localVersion['normal'] && ['isolated', 'initial', 'medial', 'final'].indexOf(embeddedForms[ef]) > -1) {
+	                  // replace presentation form
+	                  // console.log('keeping normal form of the letter');
+	                  if (_typeof(localVersion['normal']) === 'object') {
+	                    returnable += localVersion['normal'][0];
+	                  } else {
+	                    returnable += localVersion['normal'];
+	                  }
 
-	            var p = pointerLocGetter(event);
+	                  return;
+	                } // console.log('keeping this letter');
 
-	            if (!started) {
-	                var dist = geoVecLength(startOrigin,  p);
-	                var tolerance = event.pointerType === 'pen' ? _penTolerancePx : _tolerancePx;
-	                // don't start until the drag has actually moved somewhat
-	                if (dist < tolerance) { return; }
 
-	                started = true;
-	                _event({ type: 'start' });
+	                returnable += letter;
+	                return;
+	              } else if (_typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
+	                // match
+	                returnable += form[0]; // console.log('added the first letter from the same array');
 
-	            // Don't send a `move` event in the same cycle as `start` since dragging
-	            // a midpoint will convert the target to a node.
+	                return;
+	              }
+	            }
+	          }
+	        } else if (localVersion === letter) {
+	          // match exact
+	          if (breakPresentationForm && letterForms['normal'] && ['isolated', 'initial', 'medial', 'final'].indexOf(versions[v]) > -1) {
+	            // replace presentation form
+	            // console.log('keeping normal form of the letter');
+	            if (_typeof(letterForms['normal']) === 'object') {
+	              returnable += letterForms['normal'][0];
 	            } else {
-
-	                startOrigin = p;
-	                event.stopPropagation();
-	                event.preventDefault();
-
-	                var dx = p[0] - startOrigin[0];
-	                var dy = p[1] - startOrigin[1];
-	                _event({
-	                    type: 'move',
-	                    point: [p[0] + offset[0],  p[1] + offset[1]],
-	                    delta: [dx, dy]
-	                });
+	              returnable += letterForms['normal'];
 	            }
-	        }
 
+	            return;
+	          } // console.log('keeping this letter');
 
-	        function pointerup() {
-	            if (_pointerId !== (event.pointerId || 'mouse')) { return; }
-
-	            _pointerId = null;
-
-	            if (started) {
-	                _event({ type: 'end' });
-
-	                event.preventDefault();
-	            }
 
-	            select(window)
-	                .on(_pointerPrefix + 'move.drag', null)
-	                .on(_pointerPrefix + 'up.drag pointercancel.drag', null);
+	          returnable += letter;
+	          return;
+	        } else if (_typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
+	          // match
+	          returnable += localVersion[0]; // console.log('added the first letter from the same array');
 
-	            selectEnable();
+	          return;
 	        }
-	    }
-
+	      }
+	    } // try ligatures
 
-	    function behavior(selection) {
-	        var matchesSelector = utilPrefixDOMProperty('matchesSelector');
-	        var delegate = pointerdown;
 
-	        if (_selector) {
-	            delegate = function() {
-	                var root = this;
-	                var target = event.target;
-	                for (; target && target !== root; target = target.parentNode) {
-	                    var datum = target.__data__;
+	    for (var v2 = 0; v2 < reference_1$3.ligatureList.length; v2++) {
+	      var normalForm = reference_1$3.ligatureList[v2];
 
-	                    var entity = datum instanceof osmNote ? datum
-	                        : datum && datum.properties && datum.properties.entity;
+	      if (normalForm !== 'words') {
+	        var ligForms = Object.keys(unicode_ligatures_1$1["default"][normalForm]);
 
-	                    if (entity && target[matchesSelector](_selector)) {
-	                        return pointerdown.call(target, entity);
-	                    }
-	                }
-	            };
+	        for (var f = 0; f < ligForms.length; f++) {
+	          if (unicode_ligatures_1$1["default"][normalForm][ligForms[f]] === letter) {
+	            returnable += normalForm;
+	            return;
+	          }
 	        }
+	      }
+	    } // try words ligatures
 
-	        selection
-	            .on(_pointerPrefix + 'down.drag' + _selector, delegate);
-	    }
-
-
-	    behavior.off = function(selection) {
-	        selection
-	            .on(_pointerPrefix + 'down.drag' + _selector, null);
-	    };
 
+	    for (var v3 = 0; v3 < reference_1$3.ligatureWordList.length; v3++) {
+	      var _normalForm = reference_1$3.ligatureWordList[v3];
 
-	    behavior.selector = function(_) {
-	        if (!arguments.length) { return _selector; }
-	        _selector = _;
-	        return behavior;
-	    };
+	      if (unicode_ligatures_1$1["default"].words[_normalForm] === letter) {
+	        returnable += _normalForm;
+	        return;
+	      }
+	    }
 
+	    returnable += letter; // console.log('kept the letter')
+	  });
+	  return returnable;
+	}
 
-	    behavior.origin = function(_) {
-	        if (!arguments.length) { return _origin; }
-	        _origin = _;
-	        return behavior;
-	    };
+	Normalization.Normal = Normal;
 
+	var CharShaper$1 = {};
 
-	    behavior.cancel = function() {
-	        select(window)
-	            .on(_pointerPrefix + 'move.drag', null)
-	            .on(_pointerPrefix + 'up.drag pointercancel.drag', null);
-	        return behavior;
-	    };
+	Object.defineProperty(CharShaper$1, "__esModule", {
+	  value: true
+	});
+	var unicode_arabic_1$1 = unicodeArabic;
+	var isArabic_1$3 = isArabic$1;
+	var reference_1$2 = reference;
 
+	function CharShaper(letter, form) {
+	  if (!isArabic_1$3.isArabic(letter)) {
+	    // fail not Arabic
+	    throw new Error('Not Arabic');
+	  }
 
-	    behavior.target = function() {
-	        if (!arguments.length) { return _target; }
-	        _target = arguments[0];
-	        _event = eventOf(_target, Array.prototype.slice.call(arguments, 1));
-	        return behavior;
-	    };
+	  if (letter === "\u0621") {
+	    // hamza alone
+	    return "\u0621";
+	  }
 
+	  for (var w = 0; w < reference_1$2.letterList.length; w++) {
+	    // ok so we are checking this potential lettertron
+	    var letterForms = unicode_arabic_1$1["default"][reference_1$2.letterList[w]];
+	    var versions = Object.keys(letterForms);
 
-	    behavior.surface = function() {
-	        if (!arguments.length) { return _surface; }
-	        _surface = arguments[0];
-	        return behavior;
-	    };
+	    for (var v = 0; v < versions.length; v++) {
+	      var localVersion = letterForms[versions[v]];
 
+	      if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
+	        if (versions.indexOf(form) > -1) {
+	          return letterForms[form];
+	        }
+	      } else if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
+	        // check embedded
+	        var embeddedVersions = Object.keys(localVersion);
 
-	    return utilRebind(behavior, dispatch$1, 'on');
+	        for (var ev = 0; ev < embeddedVersions.length; ev++) {
+	          if (localVersion[embeddedVersions[ev]] === letter || _typeof(localVersion[embeddedVersions[ev]]) === 'object' && localVersion[embeddedVersions[ev]].indexOf && localVersion[embeddedVersions[ev]].indexOf(letter) > -1) {
+	            if (embeddedVersions.indexOf(form) > -1) {
+	              return localVersion[form];
+	            }
+	          }
+	        }
+	      }
+	    }
+	  }
 	}
 
-	function modeDragNode(context) {
-	    var mode = {
-	        id: 'drag-node',
-	        button: 'browse'
-	    };
-	    var hover = behaviorHover(context).altDisables(true)
-	        .on('hover', context.ui().sidebar.hover);
-	    var edit = behaviorEdit(context);
+	CharShaper$1.CharShaper = CharShaper;
 
-	    var _nudgeInterval;
-	    var _restoreSelectedIDs = [];
-	    var _wasMidpoint = false;
-	    var _isCancelled = false;
-	    var _activeEntity;
-	    var _startLoc;
-	    var _lastLoc;
+	var WordShaper$2 = {};
 
+	Object.defineProperty(WordShaper$2, "__esModule", {
+	  value: true
+	});
+	var isArabic_1$2 = isArabic$1;
+	var reference_1$1 = reference;
+	var CharShaper_1$1 = CharShaper$1;
+	var unicode_ligatures_1 = unicodeLigatures;
 
-	    function startNudge(entity, nudge) {
-	        if (_nudgeInterval) { window.clearInterval(_nudgeInterval); }
-	        _nudgeInterval = window.setInterval(function() {
-	            context.map().pan(nudge);
-	            doMove(entity, nudge);
-	        }, 50);
-	    }
+	function WordShaper$1(word) {
+	  var state = 'initial';
+	  var output = '';
 
+	  for (var w = 0; w < word.length; w++) {
+	    var nextLetter = ' ';
 
-	    function stopNudge() {
-	        if (_nudgeInterval) {
-	            window.clearInterval(_nudgeInterval);
-	            _nudgeInterval = null;
-	        }
+	    for (var nxw = w + 1; nxw < word.length; nxw++) {
+	      if (!isArabic_1$2.isArabic(word[nxw])) {
+	        break;
+	      }
+
+	      if (reference_1$1.tashkeel.indexOf(word[nxw]) === -1) {
+	        nextLetter = word[nxw];
+	        break;
+	      }
 	    }
 
+	    if (!isArabic_1$2.isArabic(word[w]) || isArabic_1$2.isMath(word[w])) {
+	      // space or other non-Arabic
+	      output += word[w];
+	      state = 'initial';
+	    } else if (reference_1$1.tashkeel.indexOf(word[w]) > -1) {
+	      // tashkeel - add without changing state
+	      output += word[w];
+	    } else if (nextLetter === ' ' || // last Arabic letter in this word
+	    reference_1$1.lineBreakers.indexOf(word[w]) > -1) {
+	      // the current letter is known to break lines
+	      output += CharShaper_1$1.CharShaper(word[w], state === 'initial' ? 'isolated' : 'final');
+	      state = 'initial';
+	    } else if (reference_1$1.lams.indexOf(word[w]) > -1 && reference_1$1.alefs.indexOf(nextLetter) > -1) {
+	      // LA letters - advance an additional letter after this
+	      output += unicode_ligatures_1["default"][word[w] + nextLetter][state === 'initial' ? 'isolated' : 'final'];
+
+	      while (word[w] !== nextLetter) {
+	        w++;
+	      }
 
-	    function moveAnnotation(entity) {
-	        return _t('operations.move.annotation.' + entity.geometry(context.graph()));
+	      state = 'initial';
+	    } else {
+	      output += CharShaper_1$1.CharShaper(word[w], state);
+	      state = 'medial';
 	    }
+	  }
 
+	  return output;
+	}
 
-	    function connectAnnotation(nodeEntity, targetEntity) {
-	        var nodeGeometry = nodeEntity.geometry(context.graph());
-	        var targetGeometry = targetEntity.geometry(context.graph());
-	        if (nodeGeometry === 'vertex' && targetGeometry === 'vertex') {
-	            var nodeParentWayIDs = context.graph().parentWays(nodeEntity);
-	            var targetParentWayIDs = context.graph().parentWays(targetEntity);
-	            var sharedParentWays = utilArrayIntersection(nodeParentWayIDs, targetParentWayIDs);
-	            // if both vertices are part of the same way
-	            if (sharedParentWays.length !== 0) {
-	                // if the nodes are next to each other, they are merged
-	                if (sharedParentWays[0].areAdjacent(nodeEntity.id, targetEntity.id)) {
-	                    return _t('operations.connect.annotation.from_vertex.to_adjacent_vertex');
-	                }
-	                return _t('operations.connect.annotation.from_vertex.to_sibling_vertex');
-	            }
-	        }
-	        return _t('operations.connect.annotation.from_' + nodeGeometry + '.to_' + targetGeometry);
-	    }
+	WordShaper$2.WordShaper = WordShaper$1;
 
+	var ParentLetter$1 = {};
 
-	    function shouldSnapToNode(target) {
-	        if (!_activeEntity) { return false; }
-	        return _activeEntity.geometry(context.graph()) !== 'vertex' ||
-	            (target.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(target, context.graph()));
-	    }
+	Object.defineProperty(ParentLetter$1, "__esModule", {
+	  value: true
+	});
+	var unicode_arabic_1 = unicodeArabic;
+	var isArabic_1$1 = isArabic$1;
+	var reference_1 = reference;
 
+	function ParentLetter(letter) {
+	  if (!isArabic_1$1.isArabic(letter)) {
+	    throw new Error('Not an Arabic letter');
+	  }
 
-	    function origin(entity) {
-	        return context.projection(entity.loc);
-	    }
+	  for (var w = 0; w < reference_1.letterList.length; w++) {
+	    // ok so we are checking this potential lettertron
+	    var letterForms = unicode_arabic_1["default"][reference_1.letterList[w]];
+	    var versions = Object.keys(letterForms);
 
+	    for (var v = 0; v < versions.length; v++) {
+	      var localVersion = letterForms[versions[v]];
 
-	    function keydown() {
-	        if (event.keyCode === utilKeybinding.modifierCodes.alt) {
-	            if (context.surface().classed('nope')) {
-	                context.surface()
-	                    .classed('nope-suppressed', true);
-	            }
-	            context.surface()
-	                .classed('nope', false)
-	                .classed('nope-disabled', true);
-	        }
-	    }
+	      if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
+	        // look at this embedded object
+	        var embeddedForms = Object.keys(localVersion);
 
+	        for (var ef = 0; ef < embeddedForms.length; ef++) {
+	          var form = localVersion[embeddedForms[ef]];
 
-	    function keyup() {
-	        if (event.keyCode === utilKeybinding.modifierCodes.alt) {
-	            if (context.surface().classed('nope-suppressed')) {
-	                context.surface()
-	                    .classed('nope', true);
-	            }
-	            context.surface()
-	                .classed('nope-suppressed', false)
-	                .classed('nope-disabled', false);
+	          if (form === letter || _typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
+	            // match
+	            return localVersion;
+	          }
 	        }
+	      } else if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
+	        // match
+	        return letterForms;
+	      }
 	    }
 
+	    return null;
+	  }
+	}
+
+	ParentLetter$1.ParentLetter = ParentLetter;
 
-	    function start(entity) {
-	        _wasMidpoint = entity.type === 'midpoint';
-	        var hasHidden = context.features().hasHiddenConnections(entity, context.graph());
-	        _isCancelled = !context.editable() || event.sourceEvent.shiftKey || hasHidden;
+	function GrandparentLetter(letter) {
+	  if (!isArabic_1$1.isArabic(letter)) {
+	    throw new Error('Not an Arabic letter');
+	  }
 
+	  for (var w = 0; w < reference_1.letterList.length; w++) {
+	    // ok so we are checking this potential lettertron
+	    var letterForms = unicode_arabic_1["default"][reference_1.letterList[w]];
+	    var versions = Object.keys(letterForms);
 
-	        if (_isCancelled) {
-	            if (hasHidden) {
-	                context.ui().flash
-	                    .duration(4000)
-	                    .text(_t('modes.drag_node.connected_to_hidden'))();
-	            }
-	            return drag.cancel();
-	        }
+	    for (var v = 0; v < versions.length; v++) {
+	      var localVersion = letterForms[versions[v]];
 
-	        if (_wasMidpoint) {
-	            var midpoint = entity;
-	            entity = osmNode();
-	            context.perform(actionAddMidpoint(midpoint, entity));
-	            entity = context.entity(entity.id);   // get post-action entity
+	      if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
+	        // look at this embedded object
+	        var embeddedForms = Object.keys(localVersion);
 
-	            var vertex = context.surface().selectAll('.' + entity.id);
-	            drag.target(vertex.node(), entity);
+	        for (var ef = 0; ef < embeddedForms.length; ef++) {
+	          var form = localVersion[embeddedForms[ef]];
 
-	        } else {
-	            context.perform(actionNoop());
+	          if (form === letter || _typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
+	            // match
+	            return letterForms;
+	          }
 	        }
+	      } else if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
+	        // match
+	        return letterForms;
+	      }
+	    }
 
-	        _activeEntity = entity;
-	        _startLoc = entity.loc;
+	    return null;
+	  }
+	}
 
-	        hover.ignoreVertex(entity.geometry(context.graph()) === 'vertex');
+	ParentLetter$1.GrandparentLetter = GrandparentLetter;
 
-	        context.surface().selectAll('.' + _activeEntity.id)
-	            .classed('active', true);
+	Object.defineProperty(lib, "__esModule", {
+	  value: true
+	});
+	var isArabic_1 = isArabic$1;
+	lib.isArabic = isArabic_1.isArabic;
+	var GlyphSplitter_1 = GlyphSplitter$1;
+	lib.GlyphSplitter = GlyphSplitter_1.GlyphSplitter;
+	var BaselineSplitter_1 = BaselineSplitter$1;
+	lib.BaselineSplitter = BaselineSplitter_1.BaselineSplitter;
+	var Normalization_1 = Normalization;
+	lib.Normal = Normalization_1.Normal;
+	var CharShaper_1 = CharShaper$1;
+	lib.CharShaper = CharShaper_1.CharShaper;
+	var WordShaper_1 = WordShaper$2;
+	var WordShaper = lib.WordShaper = WordShaper_1.WordShaper;
+	var ParentLetter_1 = ParentLetter$1;
+	lib.ParentLetter = ParentLetter_1.ParentLetter;
+	lib.GrandparentLetter = ParentLetter_1.GrandparentLetter;
 
-	        context.enter(mode);
-	    }
+	var rtlRegex = /[\u0590-\u05FF\u0600-\u06FF\u0750-\u07BF\u08A0–\u08BF]/;
+	function fixRTLTextForSvg(inputText) {
+	  var ret = '',
+	      rtlBuffer = [];
+	  var arabicRegex = /[\u0600-\u06FF]/g;
+	  var arabicDiacritics = /[\u0610-\u061A\u064B-\u065F\u0670\u06D6-\u06ED]/g;
+	  var arabicMath = /[\u0660-\u066C\u06F0-\u06F9]+/g;
+	  var thaanaVowel = /[\u07A6-\u07B0]/;
+	  var hebrewSign = /[\u0591-\u05bd\u05bf\u05c1-\u05c5\u05c7]/; // Arabic word shaping
 
+	  if (arabicRegex.test(inputText)) {
+	    inputText = WordShaper(inputText);
+	  }
 
-	    // related code
-	    // - `behavior/draw.js` `datum()`
-	    function datum() {
-	        var event$1 = event && event.sourceEvent;
-	        if (!event$1 || event$1.altKey) {
-	            return {};
-	        } else {
-	            // When dragging, snap only to touch targets..
-	            // (this excludes area fills and active drawing elements)
-	            var d = event$1.target.__data__;
-	            return (d && d.properties && d.properties.target) ? d : {};
-	        }
-	    }
+	  for (var n = 0; n < inputText.length; n++) {
+	    var c = inputText[n];
 
+	    if (arabicMath.test(c)) {
+	      // Arabic numbers go LTR
+	      ret += rtlBuffer.reverse().join('');
+	      rtlBuffer = [c];
+	    } else {
+	      if (rtlBuffer.length && arabicMath.test(rtlBuffer[rtlBuffer.length - 1])) {
+	        ret += rtlBuffer.reverse().join('');
+	        rtlBuffer = [];
+	      }
 
-	    function doMove(entity, nudge) {
-	        nudge = nudge || [0, 0];
+	      if ((thaanaVowel.test(c) || hebrewSign.test(c) || arabicDiacritics.test(c)) && rtlBuffer.length) {
+	        rtlBuffer[rtlBuffer.length - 1] += c;
+	      } else if (rtlRegex.test(c) // include Arabic presentation forms
+	      || c.charCodeAt(0) >= 64336 && c.charCodeAt(0) <= 65023 || c.charCodeAt(0) >= 65136 && c.charCodeAt(0) <= 65279) {
+	        rtlBuffer.push(c);
+	      } else if (c === ' ' && rtlBuffer.length) {
+	        // whitespace within RTL text
+	        rtlBuffer = [rtlBuffer.reverse().join('') + ' '];
+	      } else {
+	        // non-RTL character
+	        ret += rtlBuffer.reverse().join('') + c;
+	        rtlBuffer = [];
+	      }
+	    }
+	  }
 
-	        var currPoint = (event && event.point) || context.projection(_lastLoc);
-	        var currMouse = geoVecSubtract(currPoint, nudge);
-	        var loc = context.projection.invert(currMouse);
+	  ret += rtlBuffer.reverse().join('');
+	  return ret;
+	}
 
-	        if (!_nudgeInterval) {   // If not nudging at the edge of the viewport, try to snap..
-	            // related code
-	            // - `mode/drag_node.js`     `doMove()`
-	            // - `behavior/draw.js`      `click()`
-	            // - `behavior/draw_way.js`  `move()`
-	            var d = datum();
-	            var target = d && d.properties && d.properties.entity;
-	            var targetLoc = target && target.loc;
-	            var targetNodes = d && d.properties && d.properties.nodes;
-	            var edge;
+	var DESCRIPTORS$1 = descriptors;
+	var objectKeys = objectKeys$4;
+	var toIndexedObject = toIndexedObject$b;
+	var propertyIsEnumerable = objectPropertyIsEnumerable.f;
 
-	            if (targetLoc) {   // snap to node/vertex - a point target with `.loc`
-	                if (shouldSnapToNode(target)) {
-	                    loc = targetLoc;
-	                }
+	// `Object.{ entries, values }` methods implementation
+	var createMethod$1 = function (TO_ENTRIES) {
+	  return function (it) {
+	    var O = toIndexedObject(it);
+	    var keys = objectKeys(O);
+	    var length = keys.length;
+	    var i = 0;
+	    var result = [];
+	    var key;
+	    while (length > i) {
+	      key = keys[i++];
+	      if (!DESCRIPTORS$1 || propertyIsEnumerable.call(O, key)) {
+	        result.push(TO_ENTRIES ? [key, O[key]] : O[key]);
+	      }
+	    }
+	    return result;
+	  };
+	};
 
-	            } else if (targetNodes) {   // snap to way - a line target with `.nodes`
-	                edge = geoChooseEdge(targetNodes, context.map().mouse(), context.projection, end.id);
-	                if (edge) {
-	                    loc = edge.loc;
-	                }
-	            }
-	        }
+	var objectToArray = {
+	  // `Object.entries` method
+	  // https://tc39.es/ecma262/#sec-object.entries
+	  entries: createMethod$1(true),
+	  // `Object.values` method
+	  // https://tc39.es/ecma262/#sec-object.values
+	  values: createMethod$1(false)
+	};
 
-	        context.replace(
-	            actionMoveNode(entity.id, loc)
-	        );
+	var $$k = _export;
+	var $values = objectToArray.values;
 
-	        // Below here: validations
-	        var isInvalid = false;
+	// `Object.values` method
+	// https://tc39.es/ecma262/#sec-object.values
+	$$k({ target: 'Object', stat: true }, {
+	  values: function values(O) {
+	    return $values(O);
+	  }
+	});
 
-	        // Check if this connection to `target` could cause relations to break..
-	        if (target) {
-	            isInvalid = hasRelationConflict(entity, target, edge, context.graph());
-	        }
+	// https://github.com/openstreetmap/iD/issues/772
+	// http://mathiasbynens.be/notes/localstorage-pattern#comment-9
+	var _storage;
 
-	        // Check if this drag causes the geometry to break..
-	        if (!isInvalid) {
-	            isInvalid = hasInvalidGeometry(entity, context.graph());
-	        }
+	try {
+	  _storage = localStorage;
+	} catch (e) {} // eslint-disable-line no-empty
 
 
-	        var nope = context.surface().classed('nope');
-	        if (isInvalid === 'relation' || isInvalid === 'restriction') {
-	            if (!nope) {   // about to nope - show hint
-	                context.ui().flash
-	                    .duration(4000)
-	                    .text(_t('operations.connect.' + isInvalid,
-	                        { relation: _mainPresetIndex.item('type/restriction').name() }
-	                    ))();
-	            }
-	        } else if (isInvalid) {
-	            var errorID = isInvalid === 'line' ? 'lines' : 'areas';
-	            context.ui().flash
-	                .duration(3000)
-	                .text(_t('self_intersection.error.' + errorID))();
-	        } else {
-	            if (nope) {   // about to un-nope, remove hint
-	                context.ui().flash
-	                    .duration(1)
-	                    .text('')();
-	            }
-	        }
+	_storage = _storage || function () {
+	  var s = {};
+	  return {
+	    getItem: function getItem(k) {
+	      return s[k];
+	    },
+	    setItem: function setItem(k, v) {
+	      return s[k] = v;
+	    },
+	    removeItem: function removeItem(k) {
+	      return delete s[k];
+	    }
+	  };
+	}(); //
+	// corePreferences is an interface for persisting basic key-value strings
+	// within and between iD sessions on the same site.
+	//
 
+	/**
+	 * @param {string} k
+	 * @param {string?} v
+	 * @returns {boolean} true if the action succeeded
+	 */
 
-	        var nopeDisabled = context.surface().classed('nope-disabled');
-	        if (nopeDisabled) {
-	            context.surface()
-	                .classed('nope', false)
-	                .classed('nope-suppressed', isInvalid);
-	        } else {
-	            context.surface()
-	                .classed('nope', isInvalid)
-	                .classed('nope-suppressed', false);
-	        }
 
-	        _lastLoc = loc;
+	function corePreferences(k, v) {
+	  try {
+	    if (arguments.length === 1) return _storage.getItem(k);else if (v === null) _storage.removeItem(k);else _storage.setItem(k, v);
+	    return true;
+	  } catch (e) {
+	    /* eslint-disable no-console */
+	    if (typeof console !== 'undefined') {
+	      console.error('localStorage quota exceeded');
 	    }
+	    /* eslint-enable no-console */
 
 
-	    // Uses `actionConnect.disabled()` to know whether this connection is ok..
-	    function hasRelationConflict(entity, target, edge, graph) {
-	        var testGraph = graph.update();  // copy
+	    return false;
+	  }
+	}
 
-	        // if snapping to way - add midpoint there and consider that the target..
-	        if (edge) {
-	            var midpoint = osmNode();
-	            var action = actionAddMidpoint({
-	                loc: edge.loc,
-	                edge: [target.nodes[edge.index - 1], target.nodes[edge.index]]
-	            }, midpoint);
+	var vparse = {exports: {}};
 
-	            testGraph = action(testGraph);
-	            target = midpoint;
-	        }
+	(function (module) {
+	  (function (window) {
 
-	        // can we connect to it?
-	        var ids = [entity.id, target.id];
-	        return actionConnect(ids).disabled(testGraph);
+	    function parseVersion(v) {
+	      var m = v.replace(/[^0-9.]/g, '').match(/[0-9]*\.|[0-9]+/g) || [];
+	      v = {
+	        major: +m[0] || 0,
+	        minor: +m[1] || 0,
+	        patch: +m[2] || 0,
+	        build: +m[3] || 0
+	      };
+	      v.isEmpty = !v.major && !v.minor && !v.patch && !v.build;
+	      v.parsed = [v.major, v.minor, v.patch, v.build];
+	      v.text = v.parsed.join('.');
+	      v.compare = compare;
+	      return v;
 	    }
 
+	    function compare(v) {
+	      if (typeof v === 'string') {
+	        v = parseVersion(v);
+	      }
 
-	    function hasInvalidGeometry(entity, graph) {
-	        var parents = graph.parentWays(entity);
-	        var i, j, k;
+	      for (var i = 0; i < 4; i++) {
+	        if (this.parsed[i] !== v.parsed[i]) {
+	          return this.parsed[i] > v.parsed[i] ? 1 : -1;
+	        }
+	      }
 
-	        for (i = 0; i < parents.length; i++) {
-	            var parent = parents[i];
-	            var nodes = [];
-	            var activeIndex = null;    // which multipolygon ring contains node being dragged
-
-	            // test any parent multipolygons for valid geometry
-	            var relations = graph.parentRelations(parent);
-	            for (j = 0; j < relations.length; j++) {
-	                if (!relations[j].isMultipolygon()) { continue; }
-
-	                var rings = osmJoinWays(relations[j].members, graph);
-
-	                // find active ring and test it for self intersections
-	                for (k = 0; k < rings.length; k++) {
-	                    nodes = rings[k].nodes;
-	                    if (nodes.find(function(n) { return n.id === entity.id; })) {
-	                        activeIndex = k;
-	                        if (geoHasSelfIntersections(nodes, entity.id)) {
-	                            return 'multipolygonMember';
-	                        }
-	                    }
-	                    rings[k].coords = nodes.map(function(n) { return n.loc; });
-	                }
+	      return 0;
+	    }
+	    /* istanbul ignore next */
 
-	                // test active ring for intersections with other rings in the multipolygon
-	                for (k = 0; k < rings.length; k++) {
-	                    if (k === activeIndex) { continue; }
 
-	                    // make sure active ring doesn't cross passive rings
-	                    if (geoHasLineIntersections(rings[activeIndex].nodes, rings[k].nodes, entity.id)) {
-	                        return 'multipolygonRing';
-	                    }
-	                }
-	            }
+	    if (module && 'object' === 'object') {
+	      module.exports = parseVersion;
+	    } else {
+	      window.parseVersion = parseVersion;
+	    }
+	  })(commonjsGlobal);
+	})(vparse);
+
+	var parseVersion = vparse.exports;
+
+	var name = "iD";
+	var version = "2.20.2";
+	var description = "A friendly editor for OpenStreetMap";
+	var main = "dist/iD.min.js";
+	var repository = "github:openstreetmap/iD";
+	var homepage = "https://github.com/openstreetmap/iD";
+	var bugs = "https://github.com/openstreetmap/iD/issues";
+	var keywords = ["editor","openstreetmap"];
+	var license = "ISC";
+	var scripts = {all:"npm-run-all -s clean build build:legacy dist",build:"npm-run-all -s build:css build:data build:dev","build:css":"node scripts/build_css.js","build:data":"shx mkdir -p dist/data && node scripts/build_data.js","build:dev":"rollup --config config/rollup.config.dev.js","build:legacy":"rollup --config config/rollup.config.legacy.js","build:stats":"rollup --config config/rollup.config.stats.js",clean:"shx rm -f dist/*.js dist/*.map dist/*.css dist/img/*.svg",dist:"npm-run-all -p dist:**","dist:mapillary":"shx mkdir -p dist/mapillary-js && shx cp -R node_modules/mapillary-js/dist/* dist/mapillary-js/","dist:pannellum":"shx mkdir -p dist/pannellum-streetside && shx cp -R node_modules/pannellum/build/* dist/pannellum-streetside/","dist:min:iD":"uglifyjs dist/iD.legacy.js --compress --mangle --output dist/iD.min.js","dist:svg:iD":"svg-sprite --symbol --symbol-dest . --shape-id-generator \"iD-%s\" --symbol-sprite dist/img/iD-sprite.svg \"svg/iD-sprite/**/*.svg\"","dist:svg:community":"svg-sprite --symbol --symbol-dest . --shape-id-generator \"community-%s\" --symbol-sprite dist/img/community-sprite.svg node_modules/osm-community-index/dist/img/*.svg","dist:svg:fa":"svg-sprite --symbol --symbol-dest . --symbol-sprite dist/img/fa-sprite.svg svg/fontawesome/*.svg","dist:svg:maki":"svg-sprite --symbol --symbol-dest . --shape-id-generator \"maki-%s\" --symbol-sprite dist/img/maki-sprite.svg node_modules/@mapbox/maki/icons/*.svg","dist:svg:mapillary:signs":"svg-sprite --symbol --symbol-dest . --symbol-sprite dist/img/mapillary-sprite.svg node_modules/mapillary_sprite_source/package_signs/*.svg","dist:svg:mapillary:objects":"svg-sprite --symbol --symbol-dest . --symbol-sprite dist/img/mapillary-object-sprite.svg node_modules/mapillary_sprite_source/package_objects/*.svg","dist:svg:temaki":"svg-sprite --symbol --symbol-dest . --shape-id-generator \"temaki-%s\" --symbol-sprite dist/img/temaki-sprite.svg node_modules/@ideditor/temaki/icons/*.svg",imagery:"node scripts/update_imagery.js",lint:"eslint scripts test/spec modules","lint:fix":"eslint scripts test/spec modules --fix",start:"npm-run-all -s build start:server",quickstart:"npm-run-all -s build:dev start:server","start:server":"node scripts/server.js",test:"npm-run-all -s lint build:css build:data build:legacy test:spec","test:spec":"phantomjs --web-security=no node_modules/mocha-phantomjs-core/mocha-phantomjs-core.js test/index.html spec",translations:"node scripts/update_locales.js"};
+	var dependencies = {"@ideditor/country-coder":"~5.0.3","@ideditor/location-conflation":"~1.0.2","@mapbox/geojson-area":"^0.2.2","@mapbox/sexagesimal":"1.2.0","@mapbox/vector-tile":"^1.3.1","@tmcw/togeojson":"^4.5.0","@turf/bbox-clip":"^6.0.0","abortcontroller-polyfill":"^1.4.0","aes-js":"^3.1.2","alif-toolkit":"^1.2.9","core-js":"^3.6.5",diacritics:"1.3.0","fast-deep-equal":"~3.1.1","fast-json-stable-stringify":"2.1.0","lodash-es":"~4.17.15",marked:"~2.0.0","node-diff3":"2.1.0","osm-auth":"1.1.0",pannellum:"2.5.6",pbf:"^3.2.1","polygon-clipping":"~0.15.1",rbush:"3.0.1","whatwg-fetch":"^3.4.1","which-polygon":"2.2.0"};
+	var devDependencies = {"@babel/core":"^7.11.6","@babel/preset-env":"^7.11.5","@fortawesome/fontawesome-svg-core":"^1.2.32","@fortawesome/free-brands-svg-icons":"~5.15.1","@fortawesome/free-regular-svg-icons":"~5.15.1","@fortawesome/free-solid-svg-icons":"~5.15.1","@ideditor/temaki":"~4.4.0","@mapbox/maki":"^6.0.0","@rollup/plugin-babel":"^5.2.1","@rollup/plugin-commonjs":"^21.0.0","@rollup/plugin-json":"^4.0.1","@rollup/plugin-node-resolve":"~13.0.5",autoprefixer:"^10.0.1",btoa:"^1.2.1",chai:"^4.1.0","cldr-core":"37.0.0","cldr-localenames-full":"37.0.0",colors:"^1.1.2","concat-files":"^0.1.1",d3:"~6.6.0","editor-layer-index":"github:osmlab/editor-layer-index#gh-pages",eslint:"^7.1.0",gaze:"^1.1.3",glob:"^7.1.0",happen:"^0.3.1","js-yaml":"^4.0.0","json-stringify-pretty-compact":"^3.0.0",mapillary_sprite_source:"^1.8.0","mapillary-js":"4.0.0",minimist:"^1.2.3",mocha:"^7.0.1","mocha-phantomjs-core":"^2.1.0","name-suggestion-index":"~6.0","node-fetch":"^2.6.1","npm-run-all":"^4.0.0","object-inspect":"1.10.3","osm-community-index":"~5.1.0","phantomjs-prebuilt":"~2.1.16",postcss:"^8.1.1","postcss-selector-prepend":"^0.5.0",rollup:"~2.52.8","rollup-plugin-includepaths":"~0.2.3","rollup-plugin-progress":"^1.1.1","rollup-plugin-visualizer":"~4.2.0",shelljs:"^0.8.0",shx:"^0.3.0",sinon:"7.5.0","sinon-chai":"^3.3.0",smash:"0.0","static-server":"^2.2.1","svg-sprite":"1.5.1","uglify-js":"~3.13.0",vparse:"~1.1.0"};
+	var engines = {node:">=10"};
+	var browserslist = ["> 0.2%, last 6 major versions, Firefox ESR, IE 11, maintained node versions"];
+	var packageJSON = {
+	name: name,
+	version: version,
+	description: description,
+	main: main,
+	repository: repository,
+	homepage: homepage,
+	bugs: bugs,
+	keywords: keywords,
+	license: license,
+	scripts: scripts,
+	dependencies: dependencies,
+	devDependencies: devDependencies,
+	engines: engines,
+	browserslist: browserslist
+	};
 
+	var _mainFileFetcher = coreFileFetcher(); // singleton
+	// coreFileFetcher asynchronously fetches data from JSON files
+	//
 
-	            // If we still haven't tested this node's parent way for self-intersections.
-	            // (because it's not a member of a multipolygon), test it now.
-	            if (activeIndex === null) {
-	                nodes = parent.nodes.map(function(nodeID) { return graph.entity(nodeID); });
-	                if (nodes.length && geoHasSelfIntersections(nodes, entity.id)) {
-	                    return parent.geometry(graph);
-	                }
-	            }
+	function coreFileFetcher() {
+	  var ociVersion = packageJSON.devDependencies['osm-community-index'];
+	  var v = parseVersion(ociVersion);
+	  var vMinor = "".concat(v.major, ".").concat(v.minor);
+	  var _this = {};
+	  var _inflight = {};
+	  var _fileMap = {
+	    'address_formats': 'data/address_formats.min.json',
+	    'deprecated': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/deprecated.min.json',
+	    'discarded': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/discarded.min.json',
+	    'imagery': 'data/imagery.min.json',
+	    'intro_graph': 'data/intro_graph.min.json',
+	    'keepRight': 'data/keepRight.min.json',
+	    'languages': 'data/languages.min.json',
+	    'locales': 'locales/index.min.json',
+	    'oci_defaults': "https://cdn.jsdelivr.net/npm/osm-community-index@".concat(vMinor, "/dist/defaults.min.json"),
+	    'oci_features': "https://cdn.jsdelivr.net/npm/osm-community-index@".concat(vMinor, "/dist/featureCollection.min.json"),
+	    'oci_resources': "https://cdn.jsdelivr.net/npm/osm-community-index@".concat(vMinor, "/dist/resources.min.json"),
+	    'preset_categories': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/preset_categories.min.json',
+	    'preset_defaults': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/preset_defaults.min.json',
+	    'preset_fields': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/fields.min.json',
+	    'preset_presets': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/presets.min.json',
+	    'phone_formats': 'data/phone_formats.min.json',
+	    'qa_data': 'data/qa_data.min.json',
+	    'shortcuts': 'data/shortcuts.min.json',
+	    'territory_languages': 'data/territory_languages.min.json',
+	    'wmf_sitematrix': 'https://cdn.jsdelivr.net/npm/wmf-sitematrix@0.1/wikipedia.min.json'
+	  };
+	  var _cachedData = {}; // expose the cache; useful for tests
 
-	        }
+	  _this.cache = function () {
+	    return _cachedData;
+	  }; // Returns a Promise to fetch data
+	  // (resolved with the data if we have it already)
 
-	        return false;
+
+	  _this.get = function (which) {
+	    if (_cachedData[which]) {
+	      return Promise.resolve(_cachedData[which]);
 	    }
 
+	    var file = _fileMap[which];
 
-	    function move(entity) {
-	        if (_isCancelled) { return; }
-	        event.sourceEvent.stopPropagation();
+	    var url = file && _this.asset(file);
 
-	        context.surface().classed('nope-disabled', event.sourceEvent.altKey);
+	    if (!url) {
+	      return Promise.reject("Unknown data file for \"".concat(which, "\""));
+	    }
 
-	        _lastLoc = context.projection.invert(event.point);
+	    var prom = _inflight[url];
 
-	        doMove(entity);
-	        var nudge = geoViewportEdge(event.point, context.map().dimensions());
-	        if (nudge) {
-	            startNudge(entity, nudge);
-	        } else {
-	            stopNudge();
+	    if (!prom) {
+	      _inflight[url] = prom = fetch(url).then(function (response) {
+	        // fetch in PhantomJS tests may return ok=false and status=0 even if it's okay
+	        if (!response.ok && response.status !== 0 || !response.json) {
+	          throw new Error(response.status + ' ' + response.statusText);
 	        }
-	    }
 
-	    function end(entity) {
-	        if (_isCancelled) { return; }
+	        if (response.status === 204 || response.status === 205) return; // No Content, Reset Content
 
-	        var wasPoint = entity.geometry(context.graph()) === 'point';
+	        return response.json();
+	      }).then(function (result) {
+	        delete _inflight[url];
 
-	        var d = datum();
-	        var nope = (d && d.properties && d.properties.nope) || context.surface().classed('nope');
-	        var target = d && d.properties && d.properties.entity;   // entity to snap to
+	        if (!result) {
+	          throw new Error("No data loaded for \"".concat(which, "\""));
+	        }
 
-	        if (nope) {   // bounce back
-	            context.perform(
-	                _actionBounceBack(entity.id, _startLoc)
-	            );
+	        _cachedData[which] = result;
+	        return result;
+	      })["catch"](function (err) {
+	        delete _inflight[url];
+	        throw err;
+	      });
+	    }
 
-	        } else if (target && target.type === 'way') {
-	            var choice = geoChooseEdge(context.graph().childNodes(target), context.map().mouse(), context.projection, entity.id);
-	            context.replace(
-	                actionAddMidpoint({
-	                    loc: choice.loc,
-	                    edge: [target.nodes[choice.index - 1], target.nodes[choice.index]]
-	                }, entity),
-	                connectAnnotation(entity, target)
-	            );
+	    return prom;
+	  }; // Accessor for the file map
 
-	        } else if (target && target.type === 'node' && shouldSnapToNode(target)) {
-	            context.replace(
-	                actionConnect([target.id, entity.id]),
-	                connectAnnotation(entity, target)
-	            );
 
-	        } else if (_wasMidpoint) {
-	            context.replace(
-	                actionNoop(),
-	                _t('operations.add.annotation.vertex')
-	            );
+	  _this.fileMap = function (val) {
+	    if (!arguments.length) return _fileMap;
+	    _fileMap = val;
+	    return _this;
+	  };
 
-	        } else {
-	            context.replace(
-	                actionNoop(),
-	                moveAnnotation(entity)
-	            );
-	        }
+	  var _assetPath = '';
 
-	        if (wasPoint) {
-	            context.enter(modeSelect(context, [entity.id]));
+	  _this.assetPath = function (val) {
+	    if (!arguments.length) return _assetPath;
+	    _assetPath = val;
+	    return _this;
+	  };
 
-	        } else {
-	            var reselection = _restoreSelectedIDs.filter(function(id) {
-	                return context.graph().hasEntity(id);
-	            });
+	  var _assetMap = {};
 
-	            if (reselection.length) {
-	                context.enter(modeSelect(context, reselection));
-	            } else {
-	                context.enter(modeBrowse(context));
-	            }
-	        }
-	    }
+	  _this.assetMap = function (val) {
+	    if (!arguments.length) return _assetMap;
+	    _assetMap = val;
+	    return _this;
+	  };
 
+	  _this.asset = function (val) {
+	    if (/^http(s)?:\/\//i.test(val)) return val;
+	    var filename = _assetPath + val;
+	    return _assetMap[filename] || filename;
+	  };
 
-	    function _actionBounceBack(nodeID, toLoc) {
-	        var moveNode = actionMoveNode(nodeID, toLoc);
-	        var action = function(graph, t) {
-	            // last time through, pop off the bounceback perform.
-	            // it will then overwrite the initial perform with a moveNode that does nothing
-	            if (t === 1) { context.pop(); }
-	            return moveNode(graph, t);
-	        };
-	        action.transitionable = true;
-	        return action;
-	    }
+	  return _this;
+	}
 
+	var classof = classofRaw$1;
 
-	    function cancel() {
-	        drag.cancel();
-	        context.enter(modeBrowse(context));
-	    }
+	// `thisNumberValue` abstract operation
+	// https://tc39.es/ecma262/#sec-thisnumbervalue
+	var thisNumberValue$2 = function (value) {
+	  if (typeof value != 'number' && classof(value) != 'Number') {
+	    throw TypeError('Incorrect invocation');
+	  }
+	  return +value;
+	};
 
+	var toInteger$1 = toInteger$b;
+	var requireObjectCoercible$6 = requireObjectCoercible$e;
 
-	    var drag = behaviorDrag()
-	        .selector('.layer-touch.points .target')
-	        .surface(context.container().select('.main-map').node())
-	        .origin(origin)
-	        .on('start', start)
-	        .on('move', move)
-	        .on('end', end);
+	// `String.prototype.repeat` method implementation
+	// https://tc39.es/ecma262/#sec-string.prototype.repeat
+	var stringRepeat = function repeat(count) {
+	  var str = String(requireObjectCoercible$6(this));
+	  var result = '';
+	  var n = toInteger$1(count);
+	  if (n < 0 || n == Infinity) throw RangeError('Wrong number of repetitions');
+	  for (;n > 0; (n >>>= 1) && (str += str)) if (n & 1) result += str;
+	  return result;
+	};
 
+	var $$j = _export;
+	var toInteger = toInteger$b;
+	var thisNumberValue$1 = thisNumberValue$2;
+	var repeat$2 = stringRepeat;
+	var fails$7 = fails$N;
 
-	    mode.enter = function() {
-	        context.install(hover);
-	        context.install(edit);
+	var nativeToFixed = 1.0.toFixed;
+	var floor = Math.floor;
 
-	        select(window)
-	            .on('keydown.dragNode', keydown)
-	            .on('keyup.dragNode', keyup);
+	var pow = function (x, n, acc) {
+	  return n === 0 ? acc : n % 2 === 1 ? pow(x, n - 1, acc * x) : pow(x * x, n / 2, acc);
+	};
 
-	        context.history()
-	            .on('undone.drag-node', cancel);
-	    };
+	var log = function (x) {
+	  var n = 0;
+	  var x2 = x;
+	  while (x2 >= 4096) {
+	    n += 12;
+	    x2 /= 4096;
+	  }
+	  while (x2 >= 2) {
+	    n += 1;
+	    x2 /= 2;
+	  } return n;
+	};
+
+	var multiply = function (data, n, c) {
+	  var index = -1;
+	  var c2 = c;
+	  while (++index < 6) {
+	    c2 += n * data[index];
+	    data[index] = c2 % 1e7;
+	    c2 = floor(c2 / 1e7);
+	  }
+	};
 
+	var divide = function (data, n) {
+	  var index = 6;
+	  var c = 0;
+	  while (--index >= 0) {
+	    c += data[index];
+	    data[index] = floor(c / n);
+	    c = (c % n) * 1e7;
+	  }
+	};
 
-	    mode.exit = function() {
-	        context.ui().sidebar.hover.cancel();
-	        context.uninstall(hover);
-	        context.uninstall(edit);
+	var dataToString = function (data) {
+	  var index = 6;
+	  var s = '';
+	  while (--index >= 0) {
+	    if (s !== '' || index === 0 || data[index] !== 0) {
+	      var t = String(data[index]);
+	      s = s === '' ? t : s + repeat$2.call('0', 7 - t.length) + t;
+	    }
+	  } return s;
+	};
 
-	        select(window)
-	            .on('keydown.dragNode', null)
-	            .on('keyup.dragNode', null);
+	var FORCED$4 = nativeToFixed && (
+	  0.00008.toFixed(3) !== '0.000' ||
+	  0.9.toFixed(0) !== '1' ||
+	  1.255.toFixed(2) !== '1.25' ||
+	  1000000000000000128.0.toFixed(0) !== '1000000000000000128'
+	) || !fails$7(function () {
+	  // V8 ~ Android 4.3-
+	  nativeToFixed.call({});
+	});
 
-	        context.history()
-	            .on('undone.drag-node', null);
+	// `Number.prototype.toFixed` method
+	// https://tc39.es/ecma262/#sec-number.prototype.tofixed
+	$$j({ target: 'Number', proto: true, forced: FORCED$4 }, {
+	  toFixed: function toFixed(fractionDigits) {
+	    var number = thisNumberValue$1(this);
+	    var fractDigits = toInteger(fractionDigits);
+	    var data = [0, 0, 0, 0, 0, 0];
+	    var sign = '';
+	    var result = '0';
+	    var e, z, j, k;
+
+	    if (fractDigits < 0 || fractDigits > 20) throw RangeError('Incorrect fraction digits');
+	    // eslint-disable-next-line no-self-compare -- NaN check
+	    if (number != number) return 'NaN';
+	    if (number <= -1e21 || number >= 1e21) return String(number);
+	    if (number < 0) {
+	      sign = '-';
+	      number = -number;
+	    }
+	    if (number > 1e-21) {
+	      e = log(number * pow(2, 69, 1)) - 69;
+	      z = e < 0 ? number * pow(2, -e, 1) : number / pow(2, e, 1);
+	      z *= 0x10000000000000;
+	      e = 52 - e;
+	      if (e > 0) {
+	        multiply(data, 0, z);
+	        j = fractDigits;
+	        while (j >= 7) {
+	          multiply(data, 1e7, 0);
+	          j -= 7;
+	        }
+	        multiply(data, pow(10, j, 1), 0);
+	        j = e - 1;
+	        while (j >= 23) {
+	          divide(data, 1 << 23);
+	          j -= 23;
+	        }
+	        divide(data, 1 << j);
+	        multiply(data, 1, 1);
+	        divide(data, 2);
+	        result = dataToString(data);
+	      } else {
+	        multiply(data, 0, z);
+	        multiply(data, 1 << -e, 0);
+	        result = dataToString(data) + repeat$2.call('0', fractDigits);
+	      }
+	    }
+	    if (fractDigits > 0) {
+	      k = result.length;
+	      result = sign + (k <= fractDigits
+	        ? '0.' + repeat$2.call('0', fractDigits - k) + result
+	        : result.slice(0, k - fractDigits) + '.' + result.slice(k - fractDigits));
+	    } else {
+	      result = sign + result;
+	    } return result;
+	  }
+	});
 
-	        _activeEntity = null;
+	var global$1 = global$F;
 
-	        context.surface()
-	            .classed('nope', false)
-	            .classed('nope-suppressed', false)
-	            .classed('nope-disabled', false)
-	            .selectAll('.active')
-	            .classed('active', false);
+	var globalIsFinite = global$1.isFinite;
 
-	        stopNudge();
-	    };
+	// `Number.isFinite` method
+	// https://tc39.es/ecma262/#sec-number.isfinite
+	// eslint-disable-next-line es/no-number-isfinite -- safe
+	var numberIsFinite$1 = Number.isFinite || function isFinite(it) {
+	  return typeof it == 'number' && globalIsFinite(it);
+	};
 
+	var $$i = _export;
+	var numberIsFinite = numberIsFinite$1;
 
-	    mode.selectedIDs = function() {
-	        if (!arguments.length) { return _activeEntity ? [_activeEntity.id] : []; }
-	        // no assign
-	        return mode;
-	    };
+	// `Number.isFinite` method
+	// https://tc39.es/ecma262/#sec-number.isfinite
+	$$i({ target: 'Number', stat: true }, { isFinite: numberIsFinite });
 
+	var $$h = _export;
+	var toAbsoluteIndex = toAbsoluteIndex$8;
 
-	    mode.activeID = function() {
-	        if (!arguments.length) { return _activeEntity && _activeEntity.id; }
-	        // no assign
-	        return mode;
-	    };
+	var fromCharCode = String.fromCharCode;
+	// eslint-disable-next-line es/no-string-fromcodepoint -- required for testing
+	var $fromCodePoint = String.fromCodePoint;
 
+	// length should be 1, old FF problem
+	var INCORRECT_LENGTH = !!$fromCodePoint && $fromCodePoint.length != 1;
 
-	    mode.restoreSelectedIDs = function(_) {
-	        if (!arguments.length) { return _restoreSelectedIDs; }
-	        _restoreSelectedIDs = _;
-	        return mode;
-	    };
+	// `String.fromCodePoint` method
+	// https://tc39.es/ecma262/#sec-string.fromcodepoint
+	$$h({ target: 'String', stat: true, forced: INCORRECT_LENGTH }, {
+	  // eslint-disable-next-line no-unused-vars -- required for `.length`
+	  fromCodePoint: function fromCodePoint(x) {
+	    var elements = [];
+	    var length = arguments.length;
+	    var i = 0;
+	    var code;
+	    while (length > i) {
+	      code = +arguments[i++];
+	      if (toAbsoluteIndex(code, 0x10FFFF) !== code) throw RangeError(code + ' is not a valid code point');
+	      elements.push(code < 0x10000
+	        ? fromCharCode(code)
+	        : fromCharCode(((code -= 0x10000) >> 10) + 0xD800, code % 0x400 + 0xDC00)
+	      );
+	    } return elements.join('');
+	  }
+	});
 
+	var fixRegExpWellKnownSymbolLogic = fixRegexpWellKnownSymbolLogic;
+	var anObject = anObject$m;
+	var requireObjectCoercible$5 = requireObjectCoercible$e;
+	var sameValue = sameValue$1;
+	var regExpExec = regexpExecAbstract;
 
-	    mode.behavior = drag;
+	// @@search logic
+	fixRegExpWellKnownSymbolLogic('search', function (SEARCH, nativeSearch, maybeCallNative) {
+	  return [
+	    // `String.prototype.search` method
+	    // https://tc39.es/ecma262/#sec-string.prototype.search
+	    function search(regexp) {
+	      var O = requireObjectCoercible$5(this);
+	      var searcher = regexp == undefined ? undefined : regexp[SEARCH];
+	      return searcher !== undefined ? searcher.call(regexp, O) : new RegExp(regexp)[SEARCH](String(O));
+	    },
+	    // `RegExp.prototype[@@search]` method
+	    // https://tc39.es/ecma262/#sec-regexp.prototype-@@search
+	    function (string) {
+	      var res = maybeCallNative(nativeSearch, this, string);
+	      if (res.done) return res.value;
+
+	      var rx = anObject(this);
+	      var S = String(string);
+
+	      var previousLastIndex = rx.lastIndex;
+	      if (!sameValue(previousLastIndex, 0)) rx.lastIndex = 0;
+	      var result = regExpExec(rx, S);
+	      if (!sameValue(rx.lastIndex, previousLastIndex)) rx.lastIndex = previousLastIndex;
+	      return result === null ? -1 : result.index;
+	    }
+	  ];
+	});
 
+	var rbush$2 = {exports: {}};
 
-	    return mode;
-	}
+	var quickselect$2 = {exports: {}};
 
-	function quickselect(arr, k, left, right, compare) {
-	    quickselectStep(arr, k, left || 0, right || (arr.length - 1), compare || defaultCompare);
-	}
+	(function (module, exports) {
+	  (function (global, factory) {
+	    module.exports = factory() ;
+	  })(commonjsGlobal, function () {
 
-	function quickselectStep(arr, k, left, right, compare) {
+	    function quickselect(arr, k, left, right, compare) {
+	      quickselectStep(arr, k, left || 0, right || arr.length - 1, compare || defaultCompare);
+	    }
 
-	    while (right > left) {
+	    function quickselectStep(arr, k, left, right, compare) {
+	      while (right > left) {
 	        if (right - left > 600) {
-	            var n = right - left + 1;
-	            var m = k - left + 1;
-	            var z = Math.log(n);
-	            var s = 0.5 * Math.exp(2 * z / 3);
-	            var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
-	            var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
-	            var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
-	            quickselectStep(arr, k, newLeft, newRight, compare);
+	          var n = right - left + 1;
+	          var m = k - left + 1;
+	          var z = Math.log(n);
+	          var s = 0.5 * Math.exp(2 * z / 3);
+	          var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
+	          var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
+	          var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
+	          quickselectStep(arr, k, newLeft, newRight, compare);
 	        }
 
 	        var t = arr[k];
 	        var i = left;
 	        var j = right;
-
 	        swap(arr, left, k);
-	        if (compare(arr[right], t) > 0) { swap(arr, left, right); }
+	        if (compare(arr[right], t) > 0) swap(arr, left, right);
 
 	        while (i < j) {
-	            swap(arr, i, j);
+	          swap(arr, i, j);
+	          i++;
+	          j--;
+
+	          while (compare(arr[i], t) < 0) {
 	            i++;
+	          }
+
+	          while (compare(arr[j], t) > 0) {
 	            j--;
-	            while (compare(arr[i], t) < 0) { i++; }
-	            while (compare(arr[j], t) > 0) { j--; }
+	          }
 	        }
 
-	        if (compare(arr[left], t) === 0) { swap(arr, left, j); }
-	        else {
-	            j++;
-	            swap(arr, j, right);
+	        if (compare(arr[left], t) === 0) swap(arr, left, j);else {
+	          j++;
+	          swap(arr, j, right);
 	        }
+	        if (j <= k) left = j + 1;
+	        if (k <= j) right = j - 1;
+	      }
+	    }
 
-	        if (j <= k) { left = j + 1; }
-	        if (k <= j) { right = j - 1; }
+	    function swap(arr, i, j) {
+	      var tmp = arr[i];
+	      arr[i] = arr[j];
+	      arr[j] = tmp;
 	    }
-	}
 
-	function swap(arr, i, j) {
-	    var tmp = arr[i];
-	    arr[i] = arr[j];
-	    arr[j] = tmp;
-	}
+	    function defaultCompare(a, b) {
+	      return a < b ? -1 : a > b ? 1 : 0;
+	    }
 
-	function defaultCompare(a, b) {
-	    return a < b ? -1 : a > b ? 1 : 0;
-	}
+	    return quickselect;
+	  });
+	})(quickselect$2);
 
-	var RBush = function RBush(maxEntries) {
-	    if ( maxEntries === void 0 ) maxEntries = 9;
+	rbush$2.exports = rbush$1;
 
-	    // max entries in a node is 9 by default; min node fill is 40% for best performance
-	    this._maxEntries = Math.max(4, maxEntries);
-	    this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
-	    this.clear();
-	};
+	rbush$2.exports["default"] = rbush$1;
 
-	RBush.prototype.all = function all () {
-	    return this._all(this.data, []);
-	};
+	var quickselect$1 = quickselect$2.exports;
 
-	RBush.prototype.search = function search (bbox) {
-	    var node = this.data;
-	    var result = [];
+	function rbush$1(maxEntries, format) {
+	  if (!(this instanceof rbush$1)) return new rbush$1(maxEntries, format); // max entries in a node is 9 by default; min node fill is 40% for best performance
 
-	    if (!intersects(bbox, node)) { return result; }
+	  this._maxEntries = Math.max(4, maxEntries || 9);
+	  this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
 
-	    var toBBox = this.toBBox;
-	    var nodesToSearch = [];
+	  if (format) {
+	    this._initFormat(format);
+	  }
+
+	  this.clear();
+	}
+
+	rbush$1.prototype = {
+	  all: function all() {
+	    return this._all(this.data, []);
+	  },
+	  search: function search(bbox) {
+	    var node = this.data,
+	        result = [],
+	        toBBox = this.toBBox;
+	    if (!intersects$1(bbox, node)) return result;
+	    var nodesToSearch = [],
+	        i,
+	        len,
+	        child,
+	        childBBox;
 
 	    while (node) {
-	        for (var i = 0; i < node.children.length; i++) {
-	            var child = node.children[i];
-	            var childBBox = node.leaf ? toBBox(child) : child;
+	      for (i = 0, len = node.children.length; i < len; i++) {
+	        child = node.children[i];
+	        childBBox = node.leaf ? toBBox(child) : child;
 
-	            if (intersects(bbox, childBBox)) {
-	                if (node.leaf) { result.push(child); }
-	                else if (contains$1(bbox, childBBox)) { this._all(child, result); }
-	                else { nodesToSearch.push(child); }
-	            }
+	        if (intersects$1(bbox, childBBox)) {
+	          if (node.leaf) result.push(child);else if (contains$1(bbox, childBBox)) this._all(child, result);else nodesToSearch.push(child);
 	        }
-	        node = nodesToSearch.pop();
+	      }
+
+	      node = nodesToSearch.pop();
 	    }
 
 	    return result;
-	};
-
-	RBush.prototype.collides = function collides (bbox) {
-	    var node = this.data;
-
-	    if (!intersects(bbox, node)) { return false; }
+	  },
+	  collides: function collides(bbox) {
+	    var node = this.data,
+	        toBBox = this.toBBox;
+	    if (!intersects$1(bbox, node)) return false;
+	    var nodesToSearch = [],
+	        i,
+	        len,
+	        child,
+	        childBBox;
 
-	    var nodesToSearch = [];
 	    while (node) {
-	        for (var i = 0; i < node.children.length; i++) {
-	            var child = node.children[i];
-	            var childBBox = node.leaf ? this.toBBox(child) : child;
+	      for (i = 0, len = node.children.length; i < len; i++) {
+	        child = node.children[i];
+	        childBBox = node.leaf ? toBBox(child) : child;
 
-	            if (intersects(bbox, childBBox)) {
-	                if (node.leaf || contains$1(bbox, childBBox)) { return true; }
-	                nodesToSearch.push(child);
-	            }
+	        if (intersects$1(bbox, childBBox)) {
+	          if (node.leaf || contains$1(bbox, childBBox)) return true;
+	          nodesToSearch.push(child);
 	        }
-	        node = nodesToSearch.pop();
+	      }
+
+	      node = nodesToSearch.pop();
 	    }
 
 	    return false;
-	};
-
-	RBush.prototype.load = function load (data) {
-	    if (!(data && data.length)) { return this; }
+	  },
+	  load: function load(data) {
+	    if (!(data && data.length)) return this;
 
 	    if (data.length < this._minEntries) {
-	        for (var i = 0; i < data.length; i++) {
-	            this.insert(data[i]);
-	        }
-	        return this;
-	    }
+	      for (var i = 0, len = data.length; i < len; i++) {
+	        this.insert(data[i]);
+	      }
+
+	      return this;
+	    } // recursively build the tree with the given data from scratch using OMT algorithm
+
 
-	    // recursively build the tree with the given data from scratch using OMT algorithm
 	    var node = this._build(data.slice(), 0, data.length - 1, 0);
 
 	    if (!this.data.children.length) {
-	        // save as is if tree is empty
-	        this.data = node;
-
+	      // save as is if tree is empty
+	      this.data = node;
 	    } else if (this.data.height === node.height) {
-	        // split root if trees have the same height
-	        this._splitRoot(this.data, node);
-
+	      // split root if trees have the same height
+	      this._splitRoot(this.data, node);
 	    } else {
-	        if (this.data.height < node.height) {
-	            // swap trees if inserted one is bigger
-	            var tmpNode = this.data;
-	            this.data = node;
-	            node = tmpNode;
-	        }
+	      if (this.data.height < node.height) {
+	        // swap trees if inserted one is bigger
+	        var tmpNode = this.data;
+	        this.data = node;
+	        node = tmpNode;
+	      } // insert the small tree into the large tree at appropriate level
 
-	        // insert the small tree into the large tree at appropriate level
-	        this._insert(node, this.data.height - node.height - 1, true);
+
+	      this._insert(node, this.data.height - node.height - 1, true);
 	    }
 
 	    return this;
-	};
-
-	RBush.prototype.insert = function insert (item) {
-	    if (item) { this._insert(item, this.data.height - 1); }
+	  },
+	  insert: function insert(item) {
+	    if (item) this._insert(item, this.data.height - 1);
 	    return this;
-	};
-
-	RBush.prototype.clear = function clear () {
-	    this.data = createNode([]);
+	  },
+	  clear: function clear() {
+	    this.data = createNode$1([]);
 	    return this;
-	};
-
-	RBush.prototype.remove = function remove (item, equalsFn) {
-	    if (!item) { return this; }
-
-	    var node = this.data;
-	    var bbox = this.toBBox(item);
-	    var path = [];
-	    var indexes = [];
-	    var i, parent, goingUp;
+	  },
+	  remove: function remove(item, equalsFn) {
+	    if (!item) return this;
+	    var node = this.data,
+	        bbox = this.toBBox(item),
+	        path = [],
+	        indexes = [],
+	        i,
+	        parent,
+	        index,
+	        goingUp; // depth-first iterative tree traversal
 
-	    // depth-first iterative tree traversal
 	    while (node || path.length) {
+	      if (!node) {
+	        // go up
+	        node = path.pop();
+	        parent = path[path.length - 1];
+	        i = indexes.pop();
+	        goingUp = true;
+	      }
 
-	        if (!node) { // go up
-	            node = path.pop();
-	            parent = path[path.length - 1];
-	            i = indexes.pop();
-	            goingUp = true;
-	        }
+	      if (node.leaf) {
+	        // check current node
+	        index = findItem$1(item, node.children, equalsFn);
 
-	        if (node.leaf) { // check current node
-	            var index = findItem(item, node.children, equalsFn);
+	        if (index !== -1) {
+	          // item found, remove the item and condense tree upwards
+	          node.children.splice(index, 1);
+	          path.push(node);
 
-	            if (index !== -1) {
-	                // item found, remove the item and condense tree upwards
-	                node.children.splice(index, 1);
-	                path.push(node);
-	                this._condense(path);
-	                return this;
-	            }
-	        }
+	          this._condense(path);
 
-	        if (!goingUp && !node.leaf && contains$1(node, bbox)) { // go down
-	            path.push(node);
-	            indexes.push(i);
-	            i = 0;
-	            parent = node;
-	            node = node.children[0];
+	          return this;
+	        }
+	      }
 
-	        } else if (parent) { // go right
-	            i++;
-	            node = parent.children[i];
-	            goingUp = false;
+	      if (!goingUp && !node.leaf && contains$1(node, bbox)) {
+	        // go down
+	        path.push(node);
+	        indexes.push(i);
+	        i = 0;
+	        parent = node;
+	        node = node.children[0];
+	      } else if (parent) {
+	        // go right
+	        i++;
+	        node = parent.children[i];
+	        goingUp = false;
+	      } else node = null; // nothing found
 
-	        } else { node = null; } // nothing found
 	    }
 
 	    return this;
-	};
-
-	RBush.prototype.toBBox = function toBBox (item) { return item; };
-
-	RBush.prototype.compareMinX = function compareMinX (a, b) { return a.minX - b.minX; };
-	RBush.prototype.compareMinY = function compareMinY (a, b) { return a.minY - b.minY; };
-
-	RBush.prototype.toJSON = function toJSON () { return this.data; };
-
-	RBush.prototype.fromJSON = function fromJSON (data) {
+	  },
+	  toBBox: function toBBox(item) {
+	    return item;
+	  },
+	  compareMinX: compareNodeMinX$1,
+	  compareMinY: compareNodeMinY$1,
+	  toJSON: function toJSON() {
+	    return this.data;
+	  },
+	  fromJSON: function fromJSON(data) {
 	    this.data = data;
 	    return this;
-	};
-
-	RBush.prototype._all = function _all (node, result) {
+	  },
+	  _all: function _all(node, result) {
 	    var nodesToSearch = [];
-	    while (node) {
-	        if (node.leaf) { result.push.apply(result, node.children); }
-	        else { nodesToSearch.push.apply(nodesToSearch, node.children); }
 
-	        node = nodesToSearch.pop();
+	    while (node) {
+	      if (node.leaf) result.push.apply(result, node.children);else nodesToSearch.push.apply(nodesToSearch, node.children);
+	      node = nodesToSearch.pop();
 	    }
-	    return result;
-	};
-
-	RBush.prototype._build = function _build (items, left, right, height) {
 
-	    var N = right - left + 1;
-	    var M = this._maxEntries;
-	    var node;
+	    return result;
+	  },
+	  _build: function _build(items, left, right, height) {
+	    var N = right - left + 1,
+	        M = this._maxEntries,
+	        node;
 
 	    if (N <= M) {
-	        // reached leaf level; return leaf
-	        node = createNode(items.slice(left, right + 1));
-	        calcBBox(node, this.toBBox);
-	        return node;
+	      // reached leaf level; return leaf
+	      node = createNode$1(items.slice(left, right + 1));
+	      calcBBox$1(node, this.toBBox);
+	      return node;
 	    }
 
 	    if (!height) {
-	        // target height of the bulk-loaded tree
-	        height = Math.ceil(Math.log(N) / Math.log(M));
+	      // target height of the bulk-loaded tree
+	      height = Math.ceil(Math.log(N) / Math.log(M)); // target number of root entries to maximize storage utilization
 
-	        // target number of root entries to maximize storage utilization
-	        M = Math.ceil(N / Math.pow(M, height - 1));
+	      M = Math.ceil(N / Math.pow(M, height - 1));
 	    }
 
-	    node = createNode([]);
+	    node = createNode$1([]);
 	    node.leaf = false;
-	    node.height = height;
-
-	    // split the items into M mostly square tiles
+	    node.height = height; // split the items into M mostly square tiles
 
-	    var N2 = Math.ceil(N / M);
-	    var N1 = N2 * Math.ceil(Math.sqrt(M));
+	    var N2 = Math.ceil(N / M),
+	        N1 = N2 * Math.ceil(Math.sqrt(M)),
+	        i,
+	        j,
+	        right2,
+	        right3;
+	    multiSelect$1(items, left, right, N1, this.compareMinX);
 
-	    multiSelect(items, left, right, N1, this.compareMinX);
+	    for (i = left; i <= right; i += N1) {
+	      right2 = Math.min(i + N1 - 1, right);
+	      multiSelect$1(items, i, right2, N2, this.compareMinY);
 
-	    for (var i = left; i <= right; i += N1) {
+	      for (j = i; j <= right2; j += N2) {
+	        right3 = Math.min(j + N2 - 1, right2); // pack each entry recursively
 
-	        var right2 = Math.min(i + N1 - 1, right);
-
-	        multiSelect(items, i, right2, N2, this.compareMinY);
-
-	        for (var j = i; j <= right2; j += N2) {
-
-	            var right3 = Math.min(j + N2 - 1, right2);
-
-	            // pack each entry recursively
-	            node.children.push(this._build(items, j, right3, height - 1));
-	        }
+	        node.children.push(this._build(items, j, right3, height - 1));
+	      }
 	    }
 
-	    calcBBox(node, this.toBBox);
-
+	    calcBBox$1(node, this.toBBox);
 	    return node;
-	};
+	  },
+	  _chooseSubtree: function _chooseSubtree(bbox, node, level, path) {
+	    var i, len, child, targetNode, area, enlargement, minArea, minEnlargement;
 
-	RBush.prototype._chooseSubtree = function _chooseSubtree (bbox, node, level, path) {
 	    while (true) {
-	        path.push(node);
-
-	        if (node.leaf || path.length - 1 === level) { break; }
-
-	        var minArea = Infinity;
-	        var minEnlargement = Infinity;
-	        var targetNode = (void 0);
+	      path.push(node);
+	      if (node.leaf || path.length - 1 === level) break;
+	      minArea = minEnlargement = Infinity;
 
-	        for (var i = 0; i < node.children.length; i++) {
-	            var child = node.children[i];
-	            var area = bboxArea(child);
-	            var enlargement = enlargedArea(bbox, child) - area;
-
-	            // choose entry with the least area enlargement
-	            if (enlargement < minEnlargement) {
-	                minEnlargement = enlargement;
-	                minArea = area < minArea ? area : minArea;
-	                targetNode = child;
-
-	            } else if (enlargement === minEnlargement) {
-	                // otherwise choose one with the smallest area
-	                if (area < minArea) {
-	                    minArea = area;
-	                    targetNode = child;
-	                }
-	            }
+	      for (i = 0, len = node.children.length; i < len; i++) {
+	        child = node.children[i];
+	        area = bboxArea$1(child);
+	        enlargement = enlargedArea$1(bbox, child) - area; // choose entry with the least area enlargement
+
+	        if (enlargement < minEnlargement) {
+	          minEnlargement = enlargement;
+	          minArea = area < minArea ? area : minArea;
+	          targetNode = child;
+	        } else if (enlargement === minEnlargement) {
+	          // otherwise choose one with the smallest area
+	          if (area < minArea) {
+	            minArea = area;
+	            targetNode = child;
+	          }
 	        }
+	      }
 
-	        node = targetNode || node.children[0];
+	      node = targetNode || node.children[0];
 	    }
 
 	    return node;
-	};
+	  },
+	  _insert: function _insert(item, level, isNode) {
+	    var toBBox = this.toBBox,
+	        bbox = isNode ? item : toBBox(item),
+	        insertPath = []; // find the best node for accommodating the item, saving all nodes along the path too
 
-	RBush.prototype._insert = function _insert (item, level, isNode) {
-	    var bbox = isNode ? item : this.toBBox(item);
-	    var insertPath = [];
+	    var node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node
 
-	    // find the best node for accommodating the item, saving all nodes along the path too
-	    var node = this._chooseSubtree(bbox, this.data, level, insertPath);
 
-	    // put the item into the node
 	    node.children.push(item);
-	    extend$1(node, bbox);
+	    extend$2(node, bbox); // split on node overflow; propagate upwards if necessary
 
-	    // split on node overflow; propagate upwards if necessary
 	    while (level >= 0) {
-	        if (insertPath[level].children.length > this._maxEntries) {
-	            this._split(insertPath, level);
-	            level--;
-	        } else { break; }
-	    }
+	      if (insertPath[level].children.length > this._maxEntries) {
+	        this._split(insertPath, level);
+
+	        level--;
+	      } else break;
+	    } // adjust bboxes along the insertion path
 
-	    // adjust bboxes along the insertion path
-	    this._adjustParentBBoxes(bbox, insertPath, level);
-	};
 
-	// split overflowed node into two
-	RBush.prototype._split = function _split (insertPath, level) {
-	    var node = insertPath[level];
-	    var M = node.children.length;
-	    var m = this._minEntries;
+	    this._adjustParentBBoxes(bbox, insertPath, level);
+	  },
+	  // split overflowed node into two
+	  _split: function _split(insertPath, level) {
+	    var node = insertPath[level],
+	        M = node.children.length,
+	        m = this._minEntries;
 
 	    this._chooseSplitAxis(node, m, M);
 
 	    var splitIndex = this._chooseSplitIndex(node, m, M);
 
-	    var newNode = createNode(node.children.splice(splitIndex, node.children.length - splitIndex));
+	    var newNode = createNode$1(node.children.splice(splitIndex, node.children.length - splitIndex));
 	    newNode.height = node.height;
 	    newNode.leaf = node.leaf;
-
-	    calcBBox(node, this.toBBox);
-	    calcBBox(newNode, this.toBBox);
-
-	    if (level) { insertPath[level - 1].children.push(newNode); }
-	    else { this._splitRoot(node, newNode); }
-	};
-
-	RBush.prototype._splitRoot = function _splitRoot (node, newNode) {
+	    calcBBox$1(node, this.toBBox);
+	    calcBBox$1(newNode, this.toBBox);
+	    if (level) insertPath[level - 1].children.push(newNode);else this._splitRoot(node, newNode);
+	  },
+	  _splitRoot: function _splitRoot(node, newNode) {
 	    // split root node
-	    this.data = createNode([node, newNode]);
+	    this.data = createNode$1([node, newNode]);
 	    this.data.height = node.height + 1;
 	    this.data.leaf = false;
-	    calcBBox(this.data, this.toBBox);
-	};
-
-	RBush.prototype._chooseSplitIndex = function _chooseSplitIndex (node, m, M) {
-	    var index;
-	    var minOverlap = Infinity;
-	    var minArea = Infinity;
-
-	    for (var i = m; i <= M - m; i++) {
-	        var bbox1 = distBBox(node, 0, i, this.toBBox);
-	        var bbox2 = distBBox(node, i, M, this.toBBox);
-
-	        var overlap = intersectionArea(bbox1, bbox2);
-	        var area = bboxArea(bbox1) + bboxArea(bbox2);
-
-	        // choose distribution with minimum overlap
-	        if (overlap < minOverlap) {
-	            minOverlap = overlap;
-	            index = i;
-
-	            minArea = area < minArea ? area : minArea;
-
-	        } else if (overlap === minOverlap) {
-	            // otherwise choose distribution with minimum area
-	            if (area < minArea) {
-	                minArea = area;
-	                index = i;
-	            }
+	    calcBBox$1(this.data, this.toBBox);
+	  },
+	  _chooseSplitIndex: function _chooseSplitIndex(node, m, M) {
+	    var i, bbox1, bbox2, overlap, area, minOverlap, minArea, index;
+	    minOverlap = minArea = Infinity;
+
+	    for (i = m; i <= M - m; i++) {
+	      bbox1 = distBBox$1(node, 0, i, this.toBBox);
+	      bbox2 = distBBox$1(node, i, M, this.toBBox);
+	      overlap = intersectionArea$1(bbox1, bbox2);
+	      area = bboxArea$1(bbox1) + bboxArea$1(bbox2); // choose distribution with minimum overlap
+
+	      if (overlap < minOverlap) {
+	        minOverlap = overlap;
+	        index = i;
+	        minArea = area < minArea ? area : minArea;
+	      } else if (overlap === minOverlap) {
+	        // otherwise choose distribution with minimum area
+	        if (area < minArea) {
+	          minArea = area;
+	          index = i;
 	        }
+	      }
 	    }
 
-	    return index || M - m;
-	};
-
-	// sorts node children by the best axis for split
-	RBush.prototype._chooseSplitAxis = function _chooseSplitAxis (node, m, M) {
-	    var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX;
-	    var compareMinY = node.leaf ? this.compareMinY : compareNodeMinY;
-	    var xMargin = this._allDistMargin(node, m, M, compareMinX);
-	    var yMargin = this._allDistMargin(node, m, M, compareMinY);
-
-	    // if total distributions margin value is minimal for x, sort by minX,
+	    return index;
+	  },
+	  // sorts node children by the best axis for split
+	  _chooseSplitAxis: function _chooseSplitAxis(node, m, M) {
+	    var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX$1,
+	        compareMinY = node.leaf ? this.compareMinY : compareNodeMinY$1,
+	        xMargin = this._allDistMargin(node, m, M, compareMinX),
+	        yMargin = this._allDistMargin(node, m, M, compareMinY); // if total distributions margin value is minimal for x, sort by minX,
 	    // otherwise it's already sorted by minY
-	    if (xMargin < yMargin) { node.children.sort(compareMinX); }
-	};
 
-	// total margin of all possible split distributions where each node is at least m full
-	RBush.prototype._allDistMargin = function _allDistMargin (node, m, M, compare) {
-	    node.children.sort(compare);
 
-	    var toBBox = this.toBBox;
-	    var leftBBox = distBBox(node, 0, m, toBBox);
-	    var rightBBox = distBBox(node, M - m, M, toBBox);
-	    var margin = bboxMargin(leftBBox) + bboxMargin(rightBBox);
+	    if (xMargin < yMargin) node.children.sort(compareMinX);
+	  },
+	  // total margin of all possible split distributions where each node is at least m full
+	  _allDistMargin: function _allDistMargin(node, m, M, compare) {
+	    node.children.sort(compare);
+	    var toBBox = this.toBBox,
+	        leftBBox = distBBox$1(node, 0, m, toBBox),
+	        rightBBox = distBBox$1(node, M - m, M, toBBox),
+	        margin = bboxMargin$1(leftBBox) + bboxMargin$1(rightBBox),
+	        i,
+	        child;
 
-	    for (var i = m; i < M - m; i++) {
-	        var child = node.children[i];
-	        extend$1(leftBBox, node.leaf ? toBBox(child) : child);
-	        margin += bboxMargin(leftBBox);
+	    for (i = m; i < M - m; i++) {
+	      child = node.children[i];
+	      extend$2(leftBBox, node.leaf ? toBBox(child) : child);
+	      margin += bboxMargin$1(leftBBox);
 	    }
 
-	    for (var i$1 = M - m - 1; i$1 >= m; i$1--) {
-	        var child$1 = node.children[i$1];
-	        extend$1(rightBBox, node.leaf ? toBBox(child$1) : child$1);
-	        margin += bboxMargin(rightBBox);
+	    for (i = M - m - 1; i >= m; i--) {
+	      child = node.children[i];
+	      extend$2(rightBBox, node.leaf ? toBBox(child) : child);
+	      margin += bboxMargin$1(rightBBox);
 	    }
 
 	    return margin;
-	};
-
-	RBush.prototype._adjustParentBBoxes = function _adjustParentBBoxes (bbox, path, level) {
+	  },
+	  _adjustParentBBoxes: function _adjustParentBBoxes(bbox, path, level) {
 	    // adjust bboxes along the given tree path
 	    for (var i = level; i >= 0; i--) {
-	        extend$1(path[i], bbox);
+	      extend$2(path[i], bbox);
+	    }
+	  },
+	  _condense: function _condense(path) {
+	    // go through the path, removing empty nodes and updating bboxes
+	    for (var i = path.length - 1, siblings; i >= 0; i--) {
+	      if (path[i].children.length === 0) {
+	        if (i > 0) {
+	          siblings = path[i - 1].children;
+	          siblings.splice(siblings.indexOf(path[i]), 1);
+	        } else this.clear();
+	      } else calcBBox$1(path[i], this.toBBox);
 	    }
+	  },
+	  _initFormat: function _initFormat(format) {
+	    // data format (minX, minY, maxX, maxY accessors)
+	    // uses eval-type function compilation instead of just accepting a toBBox function
+	    // because the algorithms are very sensitive to sorting functions performance,
+	    // so they should be dead simple and without inner calls
+	    var compareArr = ['return a', ' - b', ';'];
+	    this.compareMinX = new Function('a', 'b', compareArr.join(format[0]));
+	    this.compareMinY = new Function('a', 'b', compareArr.join(format[1]));
+	    this.toBBox = new Function('a', 'return {minX: a' + format[0] + ', minY: a' + format[1] + ', maxX: a' + format[2] + ', maxY: a' + format[3] + '};');
+	  }
 	};
 
-	RBush.prototype._condense = function _condense (path) {
-	    // go through the path, removing empty nodes and updating bboxes
-	    for (var i = path.length - 1, siblings = (void 0); i >= 0; i--) {
-	        if (path[i].children.length === 0) {
-	            if (i > 0) {
-	                siblings = path[i - 1].children;
-	                siblings.splice(siblings.indexOf(path[i]), 1);
+	function findItem$1(item, items, equalsFn) {
+	  if (!equalsFn) return items.indexOf(item);
 
-	            } else { this.clear(); }
+	  for (var i = 0; i < items.length; i++) {
+	    if (equalsFn(item, items[i])) return i;
+	  }
 
-	        } else { calcBBox(path[i], this.toBBox); }
-	    }
-	};
+	  return -1;
+	} // calculate node's bbox from bboxes of its children
 
-	function findItem(item, items, equalsFn) {
-	    if (!equalsFn) { return items.indexOf(item); }
 
-	    for (var i = 0; i < items.length; i++) {
-	        if (equalsFn(item, items[i])) { return i; }
-	    }
-	    return -1;
-	}
+	function calcBBox$1(node, toBBox) {
+	  distBBox$1(node, 0, node.children.length, toBBox, node);
+	} // min bounding rectangle of node children from k to p-1
 
-	// calculate node's bbox from bboxes of its children
-	function calcBBox(node, toBBox) {
-	    distBBox(node, 0, node.children.length, toBBox, node);
-	}
 
-	// min bounding rectangle of node children from k to p-1
-	function distBBox(node, k, p, toBBox, destNode) {
-	    if (!destNode) { destNode = createNode(null); }
-	    destNode.minX = Infinity;
-	    destNode.minY = Infinity;
-	    destNode.maxX = -Infinity;
-	    destNode.maxY = -Infinity;
+	function distBBox$1(node, k, p, toBBox, destNode) {
+	  if (!destNode) destNode = createNode$1(null);
+	  destNode.minX = Infinity;
+	  destNode.minY = Infinity;
+	  destNode.maxX = -Infinity;
+	  destNode.maxY = -Infinity;
 
-	    for (var i = k; i < p; i++) {
-	        var child = node.children[i];
-	        extend$1(destNode, node.leaf ? toBBox(child) : child);
-	    }
+	  for (var i = k, child; i < p; i++) {
+	    child = node.children[i];
+	    extend$2(destNode, node.leaf ? toBBox(child) : child);
+	  }
 
-	    return destNode;
+	  return destNode;
 	}
 
-	function extend$1(a, b) {
-	    a.minX = Math.min(a.minX, b.minX);
-	    a.minY = Math.min(a.minY, b.minY);
-	    a.maxX = Math.max(a.maxX, b.maxX);
-	    a.maxY = Math.max(a.maxY, b.maxY);
-	    return a;
+	function extend$2(a, b) {
+	  a.minX = Math.min(a.minX, b.minX);
+	  a.minY = Math.min(a.minY, b.minY);
+	  a.maxX = Math.max(a.maxX, b.maxX);
+	  a.maxY = Math.max(a.maxY, b.maxY);
+	  return a;
 	}
 
-	function compareNodeMinX(a, b) { return a.minX - b.minX; }
-	function compareNodeMinY(a, b) { return a.minY - b.minY; }
+	function compareNodeMinX$1(a, b) {
+	  return a.minX - b.minX;
+	}
 
-	function bboxArea(a)   { return (a.maxX - a.minX) * (a.maxY - a.minY); }
-	function bboxMargin(a) { return (a.maxX - a.minX) + (a.maxY - a.minY); }
+	function compareNodeMinY$1(a, b) {
+	  return a.minY - b.minY;
+	}
 
-	function enlargedArea(a, b) {
-	    return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) *
-	           (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));
+	function bboxArea$1(a) {
+	  return (a.maxX - a.minX) * (a.maxY - a.minY);
 	}
 
-	function intersectionArea(a, b) {
-	    var minX = Math.max(a.minX, b.minX);
-	    var minY = Math.max(a.minY, b.minY);
-	    var maxX = Math.min(a.maxX, b.maxX);
-	    var maxY = Math.min(a.maxY, b.maxY);
+	function bboxMargin$1(a) {
+	  return a.maxX - a.minX + (a.maxY - a.minY);
+	}
 
-	    return Math.max(0, maxX - minX) *
-	           Math.max(0, maxY - minY);
+	function enlargedArea$1(a, b) {
+	  return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) * (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));
 	}
 
-	function contains$1(a, b) {
-	    return a.minX <= b.minX &&
-	           a.minY <= b.minY &&
-	           b.maxX <= a.maxX &&
-	           b.maxY <= a.maxY;
+	function intersectionArea$1(a, b) {
+	  var minX = Math.max(a.minX, b.minX),
+	      minY = Math.max(a.minY, b.minY),
+	      maxX = Math.min(a.maxX, b.maxX),
+	      maxY = Math.min(a.maxY, b.maxY);
+	  return Math.max(0, maxX - minX) * Math.max(0, maxY - minY);
 	}
 
-	function intersects(a, b) {
-	    return b.minX <= a.maxX &&
-	           b.minY <= a.maxY &&
-	           b.maxX >= a.minX &&
-	           b.maxY >= a.minY;
+	function contains$1(a, b) {
+	  return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
 	}
 
-	function createNode(children) {
-	    return {
-	        children: children,
-	        height: 1,
-	        leaf: true,
-	        minX: Infinity,
-	        minY: Infinity,
-	        maxX: -Infinity,
-	        maxY: -Infinity
-	    };
+	function intersects$1(a, b) {
+	  return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
 	}
 
-	// sort an array so that items come in groups of n unsorted items, with groups sorted between each other;
+	function createNode$1(children) {
+	  return {
+	    children: children,
+	    height: 1,
+	    leaf: true,
+	    minX: Infinity,
+	    minY: Infinity,
+	    maxX: -Infinity,
+	    maxY: -Infinity
+	  };
+	} // sort an array so that items come in groups of n unsorted items, with groups sorted between each other;
 	// combines selection algorithm with binary divide & conquer approach
 
-	function multiSelect(arr, left, right, n, compare) {
-	    var stack = [left, right];
 
-	    while (stack.length) {
-	        right = stack.pop();
-	        left = stack.pop();
+	function multiSelect$1(arr, left, right, n, compare) {
+	  var stack = [left, right],
+	      mid;
+
+	  while (stack.length) {
+	    right = stack.pop();
+	    left = stack.pop();
+	    if (right - left <= n) continue;
+	    mid = left + Math.ceil((right - left) / n / 2) * n;
+	    quickselect$1(arr, mid, left, right, compare);
+	    stack.push(left, mid, mid, right);
+	  }
+	}
+
+	var lineclip_1 = lineclip$2;
+	lineclip$2.polyline = lineclip$2;
+	lineclip$2.polygon = polygonclip$1; // Cohen-Sutherland line clippign algorithm, adapted to efficiently
+	// handle polylines rather than just segments
+
+	function lineclip$2(points, bbox, result) {
+	  var len = points.length,
+	      codeA = bitCode$1(points[0], bbox),
+	      part = [],
+	      i,
+	      a,
+	      b,
+	      codeB,
+	      lastCode;
+	  if (!result) result = [];
 
-	        if (right - left <= n) { continue; }
+	  for (i = 1; i < len; i++) {
+	    a = points[i - 1];
+	    b = points[i];
+	    codeB = lastCode = bitCode$1(b, bbox);
 
-	        var mid = left + Math.ceil((right - left) / n / 2) * n;
-	        quickselect(arr, mid, left, right, compare);
+	    while (true) {
+	      if (!(codeA | codeB)) {
+	        // accept
+	        part.push(a);
+
+	        if (codeB !== lastCode) {
+	          // segment went outside
+	          part.push(b);
+
+	          if (i < len - 1) {
+	            // start a new line
+	            result.push(part);
+	            part = [];
+	          }
+	        } else if (i === len - 1) {
+	          part.push(b);
+	        }
 
-	        stack.push(left, mid, mid, right);
+	        break;
+	      } else if (codeA & codeB) {
+	        // trivial reject
+	        break;
+	      } else if (codeA) {
+	        // a outside, intersect with clip edge
+	        a = intersect$1(a, b, codeA, bbox);
+	        codeA = bitCode$1(a, bbox);
+	      } else {
+	        // b outside
+	        b = intersect$1(a, b, codeB, bbox);
+	        codeB = bitCode$1(b, bbox);
+	      }
 	    }
-	}
 
-	var tiler = utilTiler();
-	var dispatch$1 = dispatch('loaded');
-	var _tileZoom = 14;
-	var _krUrlRoot = 'https://www.keepright.at';
-	var _krData = { errorTypes: {}, localizeStrings: {} };
+	    codeA = lastCode;
+	  }
 
-	// This gets reassigned if reset
-	var _cache;
+	  if (part.length) result.push(part);
+	  return result;
+	} // Sutherland-Hodgeman polygon clipping algorithm
 
-	var _krRuleset = [
-	  // no 20 - multiple node on same spot - these are mostly boundaries overlapping roads
-	  30, 40, 50, 60, 70, 90, 100, 110, 120, 130, 150, 160, 170, 180,
-	  190, 191, 192, 193, 194, 195, 196, 197, 198,
-	  200, 201, 202, 203, 204, 205, 206, 207, 208, 210, 220,
-	  230, 231, 232, 270, 280, 281, 282, 283, 284, 285,
-	  290, 291, 292, 293, 294, 295, 296, 297, 298, 300, 310, 311, 312, 313,
-	  320, 350, 360, 370, 380, 390, 400, 401, 402, 410, 411, 412, 413
-	];
 
+	function polygonclip$1(points, bbox) {
+	  var result, edge, prev, prevInside, i, p, inside; // clip against each side of the clip rectangle
+
+	  for (edge = 1; edge <= 8; edge *= 2) {
+	    result = [];
+	    prev = points[points.length - 1];
+	    prevInside = !(bitCode$1(prev, bbox) & edge);
+
+	    for (i = 0; i < points.length; i++) {
+	      p = points[i];
+	      inside = !(bitCode$1(p, bbox) & edge); // if segment goes through the clip window, add an intersection
+
+	      if (inside !== prevInside) result.push(intersect$1(prev, p, edge, bbox));
+	      if (inside) result.push(p); // add a point if it's inside
+
+	      prev = p;
+	      prevInside = inside;
+	    }
 
-	function abortRequest(controller) {
-	  if (controller) {
-	    controller.abort();
+	    points = result;
+	    if (!points.length) break;
 	  }
-	}
 
-	function abortUnwantedRequests(cache, tiles) {
-	  Object.keys(cache.inflightTile).forEach(function (k) {
-	    var wanted = tiles.find(function (tile) { return k === tile.id; });
-	    if (!wanted) {
-	      abortRequest(cache.inflightTile[k]);
-	      delete cache.inflightTile[k];
-	    }
-	  });
-	}
+	  return result;
+	} // intersect a segment against one of the 4 lines that make up the bbox
 
 
-	function encodeIssueRtree(d) {
-	  return { minX: d.loc[0], minY: d.loc[1], maxX: d.loc[0], maxY: d.loc[1], data: d };
-	}
+	function intersect$1(a, b, edge, bbox) {
+	  return edge & 8 ? [a[0] + (b[0] - a[0]) * (bbox[3] - a[1]) / (b[1] - a[1]), bbox[3]] : // top
+	  edge & 4 ? [a[0] + (b[0] - a[0]) * (bbox[1] - a[1]) / (b[1] - a[1]), bbox[1]] : // bottom
+	  edge & 2 ? [bbox[2], a[1] + (b[1] - a[1]) * (bbox[2] - a[0]) / (b[0] - a[0])] : // right
+	  edge & 1 ? [bbox[0], a[1] + (b[1] - a[1]) * (bbox[0] - a[0]) / (b[0] - a[0])] : // left
+	  null;
+	} // bit code reflects the point position relative to the bbox:
+	//         left  mid  right
+	//    top  1001  1000  1010
+	//    mid  0001  0000  0010
+	// bottom  0101  0100  0110
 
 
-	// Replace or remove QAItem from rtree
-	function updateRtree(item, replace) {
-	  _cache.rtree.remove(item, function (a, b) { return a.data.id === b.data.id; });
+	function bitCode$1(p, bbox) {
+	  var code = 0;
+	  if (p[0] < bbox[0]) code |= 1; // left
+	  else if (p[0] > bbox[2]) code |= 2; // right
 
-	  if (replace) {
-	    _cache.rtree.insert(item);
-	  }
+	  if (p[1] < bbox[1]) code |= 4; // bottom
+	  else if (p[1] > bbox[3]) code |= 8; // top
+
+	  return code;
 	}
 
+	var rbush = rbush$2.exports;
+	var lineclip$1 = lineclip_1;
+	var whichPolygon_1 = whichPolygon;
 
-	function tokenReplacements(d) {
-	  if (!(d instanceof QAItem)) { return; }
+	function whichPolygon(data) {
+	  var bboxes = [];
 
-	  var htmlRegex = new RegExp(/<\/[a-z][\s\S]*>/);
-	  var replacements = {};
+	  for (var i = 0; i < data.features.length; i++) {
+	    var feature = data.features[i];
+	    var coords = feature.geometry.coordinates;
 
-	  var issueTemplate = _krData.errorTypes[d.whichType];
-	  if (!issueTemplate) {
-	    /* eslint-disable no-console */
-	    console.log('No Template: ', d.whichType);
-	    console.log('  ', d.description);
-	    /* eslint-enable no-console */
-	    return;
+	    if (feature.geometry.type === 'Polygon') {
+	      bboxes.push(treeItem(coords, feature.properties));
+	    } else if (feature.geometry.type === 'MultiPolygon') {
+	      for (var j = 0; j < coords.length; j++) {
+	        bboxes.push(treeItem(coords[j], feature.properties));
+	      }
+	    }
 	  }
 
-	  // some descriptions are just fixed text
-	  if (!issueTemplate.regex) { return; }
+	  var tree = rbush().load(bboxes);
 
-	  // regex pattern should match description with variable details captured
-	  var errorRegex = new RegExp(issueTemplate.regex, 'i');
-	  var errorMatch = errorRegex.exec(d.description);
-	  if (!errorMatch) {
-	    /* eslint-disable no-console */
-	    console.log('Unmatched: ', d.whichType);
-	    console.log('  ', d.description);
-	    console.log('  ', errorRegex);
-	    /* eslint-enable no-console */
-	    return;
+	  function query(p, multi) {
+	    var output = [],
+	        result = tree.search({
+	      minX: p[0],
+	      minY: p[1],
+	      maxX: p[0],
+	      maxY: p[1]
+	    });
+
+	    for (var i = 0; i < result.length; i++) {
+	      if (insidePolygon(result[i].coords, p)) {
+	        if (multi) output.push(result[i].props);else return result[i].props;
+	      }
+	    }
+
+	    return multi && output.length ? output : null;
 	  }
 
-	  for (var i = 1; i < errorMatch.length; i++) {   // skip first
-	    var capture = errorMatch[i];
-	    var idType = (void 0);
+	  query.tree = tree;
 
-	    idType = 'IDs' in issueTemplate ? issueTemplate.IDs[i-1] : '';
-	    if (idType && capture) {   // link IDs if present in the capture
-	      capture = parseError(capture, idType);
-	    } else if (htmlRegex.test(capture)) {   // escape any html in non-IDs
-	      capture = '\\' +  capture + '\\';
-	    } else {
-	      var compare = capture.toLowerCase();
-	      if (_krData.localizeStrings[compare]) {   // some replacement strings can be localized
-	        capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
+	  query.bbox = function queryBBox(bbox) {
+	    var output = [];
+	    var result = tree.search({
+	      minX: bbox[0],
+	      minY: bbox[1],
+	      maxX: bbox[2],
+	      maxY: bbox[3]
+	    });
+
+	    for (var i = 0; i < result.length; i++) {
+	      if (polygonIntersectsBBox(result[i].coords, bbox)) {
+	        output.push(result[i].props);
 	      }
 	    }
 
-	    replacements['var' + i] = capture;
-	  }
+	    return output;
+	  };
 
-	  return replacements;
+	  return query;
 	}
 
+	function polygonIntersectsBBox(polygon, bbox) {
+	  var bboxCenter = [(bbox[0] + bbox[2]) / 2, (bbox[1] + bbox[3]) / 2];
+	  if (insidePolygon(polygon, bboxCenter)) return true;
 
-	function parseError(capture, idType) {
-	  var compare = capture.toLowerCase();
-	  if (_krData.localizeStrings[compare]) {   // some replacement strings can be localized
-	    capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
+	  for (var i = 0; i < polygon.length; i++) {
+	    if (lineclip$1(polygon[i], bbox).length > 0) return true;
 	  }
 
-	  switch (idType) {
-	    // link a string like "this node"
-	    case 'this':
-	      capture = linkErrorObject(capture);
-	      break;
+	  return false;
+	} // ray casting algorithm for detecting if point is in polygon
 
-	    case 'url':
-	      capture = linkURL(capture);
-	      break;
 
-	    // link an entity ID
-	    case 'n':
-	    case 'w':
-	    case 'r':
-	      capture = linkEntity(idType + capture);
-	      break;
+	function insidePolygon(rings, p) {
+	  var inside = false;
 
-	    // some errors have more complex ID lists/variance
-	    case '20':
-	      capture = parse20(capture);
-	      break;
-	    case '211':
-	      capture = parse211(capture);
-	      break;
-	    case '231':
-	      capture = parse231(capture);
-	      break;
-	    case '294':
-	      capture = parse294(capture);
-	      break;
-	    case '370':
-	      capture = parse370(capture);
-	      break;
+	  for (var i = 0, len = rings.length; i < len; i++) {
+	    var ring = rings[i];
+
+	    for (var j = 0, len2 = ring.length, k = len2 - 1; j < len2; k = j++) {
+	      if (rayIntersect(p, ring[j], ring[k])) inside = !inside;
+	    }
 	  }
 
-	  return capture;
+	  return inside;
+	}
 
+	function rayIntersect(p, p1, p2) {
+	  return p1[1] > p[1] !== p2[1] > p[1] && p[0] < (p2[0] - p1[0]) * (p[1] - p1[1]) / (p2[1] - p1[1]) + p1[0];
+	}
 
-	  function linkErrorObject(d) {
-	    return ("<a class=\"error_object_link\">" + d + "</a>");
+	function treeItem(coords, props) {
+	  var item = {
+	    minX: Infinity,
+	    minY: Infinity,
+	    maxX: -Infinity,
+	    maxY: -Infinity,
+	    coords: coords,
+	    props: props
+	  };
+
+	  for (var i = 0; i < coords[0].length; i++) {
+	    var p = coords[0][i];
+	    item.minX = Math.min(item.minX, p[0]);
+	    item.minY = Math.min(item.minY, p[1]);
+	    item.maxX = Math.max(item.maxX, p[0]);
+	    item.maxY = Math.max(item.maxY, p[1]);
+	  }
+
+	  return item;
+	}
+
+	var type = "FeatureCollection";
+	var features = [{
+	  type: "Feature",
+	  properties: {
+	    wikidata: "Q21",
+	    nameEn: "England",
+	    aliases: ["GB-ENG"],
+	    country: "GB",
+	    groups: ["Q23666", "Q3336843", "154", "150", "UN"],
+	    driveSide: "left",
+	    roadSpeedUnit: "mph",
+	    roadHeightUnit: "ft",
+	    callingCodes: ["44"]
+	  },
+	  geometry: {
+	    type: "MultiPolygon",
+	    coordinates: [[[[-6.03913, 51.13217], [-7.74976, 48.64773], [1.17405, 50.74239], [2.18458, 51.52087], [2.56575, 51.85301], [0.792, 57.56437], [-2.30613, 55.62698], [-2.17058, 55.45916], [-2.6095, 55.28488], [-2.63532, 55.19452], [-3.02906, 55.04606], [-3.09361, 54.94924], [-3.38407, 54.94278], [-4.1819, 54.57861], [-3.5082, 53.54318], [-3.08228, 53.25526], [-3.03675, 53.25092], [-2.92329, 53.19383], [-2.92022, 53.17685], [-2.98598, 53.15589], [-2.90649, 53.10964], [-2.87469, 53.12337], [-2.89131, 53.09374], [-2.83133, 52.99184], [-2.7251, 52.98389], [-2.72221, 52.92969], [-2.80549, 52.89428], [-2.85897, 52.94487], [-2.92401, 52.93836], [-2.97243, 52.9651], [-3.13576, 52.895], [-3.15744, 52.84947], [-3.16105, 52.79599], [-3.08734, 52.77504], [-3.01001, 52.76636], [-2.95581, 52.71794], [-3.01724, 52.72083], [-3.04398, 52.65435], [-3.13648, 52.58208], [-3.12926, 52.5286], [-3.09746, 52.53077], [-3.08662, 52.54811], [-3.00929, 52.57774], [-2.99701, 52.551], [-3.03603, 52.49969], [-3.13359, 52.49174], [-3.22971, 52.45344], [-3.22754, 52.42526], [-3.04687, 52.34504], [-2.95364, 52.3501], [-2.99701, 52.323], [-3.00785, 52.2753], [-3.09289, 52.20546], [-3.12638, 52.08114], [-2.97111, 51.90456], [-2.8818, 51.93196], [-2.78742, 51.88833], [-2.74277, 51.84367], [-2.66234, 51.83555], [-2.66336, 51.59504], [-3.20563, 51.31615], [-6.03913, 51.13217]]]]
+	  }
+	}, {
+	  type: "Feature",
+	  properties: {
+	    wikidata: "Q22",
+	    nameEn: "Scotland",
+	    aliases: ["GB-SCT"],
+	    country: "GB",
+	    groups: ["Q23666", "Q3336843", "154", "150", "UN"],
+	    driveSide: "left",
+	    roadSpeedUnit: "mph",
+	    roadHeightUnit: "ft",
+	    callingCodes: ["44"]
+	  },
+	  geometry: {
+	    type: "MultiPolygon",
+	    coordinates: [[[[0.792, 57.56437], [-0.3751, 61.32236], [-14.78497, 57.60709], [-6.82333, 55.83103], [-4.69044, 54.3629], [-3.38407, 54.94278], [-3.09361, 54.94924], [-3.02906, 55.04606], [-2.63532, 55.19452], [-2.6095, 55.28488], [-2.17058, 55.45916], [-2.30613, 55.62698], [0.792, 57.56437]]]]
+	  }
+	}, {
+	  type: "Feature",
+	  properties: {
+	    wikidata: "Q25",
+	    nameEn: "Wales",
+	    aliases: ["GB-WLS"],
+	    country: "GB",
+	    groups: ["Q23666", "Q3336843", "154", "150", "UN"],
+	    driveSide: "left",
+	    roadSpeedUnit: "mph",
+	    roadHeightUnit: "ft",
+	    callingCodes: ["44"]
+	  },
+	  geometry: {
+	    type: "MultiPolygon",
+	    coordinates: [[[[-3.5082, 53.54318], [-5.37267, 53.63269], [-6.03913, 51.13217], [-3.20563, 51.31615], [-2.66336, 51.59504], [-2.66234, 51.83555], [-2.74277, 51.84367], [-2.78742, 51.88833], [-2.8818, 51.93196], [-2.97111, 51.90456], [-3.12638, 52.08114], [-3.09289, 52.20546], [-3.00785, 52.2753], [-2.99701, 52.323], [-2.95364, 52.3501], [-3.04687, 52.34504], [-3.22754, 52.42526], [-3.22971, 52.45344], [-3.13359, 52.49174], [-3.03603, 52.49969], [-2.99701, 52.551], [-3.00929, 52.57774], [-3.08662, 52.54811], [-3.09746, 52.53077], [-3.12926, 52.5286], [-3.13648, 52.58208], [-3.04398, 52.65435], [-3.01724, 52.72083], [-2.95581, 52.71794], [-3.01001, 52.76636], [-3.08734, 52.77504], [-3.16105, 52.79599], [-3.15744, 52.84947], [-3.13576, 52.895], [-2.97243, 52.9651], [-2.92401, 52.93836], [-2.85897, 52.94487], [-2.80549, 52.89428], [-2.72221, 52.92969], [-2.7251, 52.98389], [-2.83133, 52.99184], [-2.89131, 53.09374], [-2.87469, 53.12337], [-2.90649, 53.10964], [-2.98598, 53.15589], [-2.92022, 53.17685], [-2.92329, 53.19383], [-3.03675, 53.25092], [-3.08228, 53.25526], [-3.5082, 53.54318]]]]
+	  }
+	}, {
+	  type: "Feature",
+	  properties: {
+	    wikidata: "Q26",
+	    nameEn: "Northern Ireland",
+	    aliases: ["GB-NIR"],
+	    country: "GB",
+	    groups: ["Q22890", "Q3336843", "154", "150", "UN"],
+	    driveSide: "left",
+	    roadSpeedUnit: "mph",
+	    roadHeightUnit: "ft",
+	    callingCodes: ["44"]
+	  },
+	  geometry: {
+	    type: "MultiPolygon",
+	    coordinates: [[[[-6.34755, 55.49206], [-7.2471, 55.06933], [-7.34464, 55.04688], [-7.4033, 55.00391], [-7.40004, 54.94498], [-7.44404, 54.9403], [-7.4473, 54.87003], [-7.47626, 54.83084], [-7.54508, 54.79401], [-7.54671, 54.74606], [-7.64449, 54.75265], [-7.75041, 54.7103], [-7.83352, 54.73854], [-7.93293, 54.66603], [-7.70315, 54.62077], [-7.8596, 54.53671], [-7.99812, 54.54427], [-8.04538, 54.48941], [-8.179, 54.46763], [-8.04555, 54.36292], [-7.87101, 54.29299], [-7.8596, 54.21779], [-7.81397, 54.20159], [-7.69501, 54.20731], [-7.55812, 54.12239], [-7.4799, 54.12239], [-7.44567, 54.1539], [-7.32834, 54.11475], [-7.30553, 54.11869], [-7.34005, 54.14698], [-7.29157, 54.17191], [-7.28017, 54.16714], [-7.29687, 54.1354], [-7.29493, 54.12013], [-7.26316, 54.13863], [-7.25012, 54.20063], [-7.14908, 54.22732], [-7.19145, 54.31296], [-7.02034, 54.4212], [-6.87775, 54.34682], [-6.85179, 54.29176], [-6.81583, 54.22791], [-6.74575, 54.18788], [-6.70175, 54.20218], [-6.6382, 54.17071], [-6.66264, 54.0666], [-6.62842, 54.03503], [-6.47849, 54.06947], [-6.36605, 54.07234], [-6.36279, 54.11248], [-6.32694, 54.09337], [-6.29003, 54.11278], [-6.26218, 54.09785], [-5.83481, 53.87749], [-4.69044, 54.3629], [-6.34755, 55.49206]]]]
+	  }
+	}, {
+	  type: "Feature",
+	  properties: {
+	    wikidata: "Q35",
+	    nameEn: "Denmark",
+	    country: "DK",
+	    groups: ["EU", "154", "150", "UN"],
+	    callingCodes: ["45"]
+	  },
+	  geometry: {
+	    type: "MultiPolygon",
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+	    coordinates: [[[[31.30611, -22.422], [31.16344, -22.32599], [31.08932, -22.34884], [30.86696, -22.28907], [30.6294, -22.32599], [30.48686, -22.31368], [30.38614, -22.34533], [30.28351, -22.35587], [30.2265, -22.2961], [30.13147, -22.30841], [29.92242, -22.19408], [29.76848, -22.14128], [29.64609, -22.12917], [29.37703, -22.19581], [29.21955, -22.17771], [29.18974, -22.18599], [29.15268, -22.21399], [29.10881, -22.21202], [29.0151, -22.22907], [28.91889, -22.44299], [28.63287, -22.55887], [28.34874, -22.5694], [28.04562, -22.8394], [28.04752, -22.90243], [27.93729, -22.96194], [27.93539, -23.04941], [27.74154, -23.2137], [27.6066, -23.21894], [27.52393, -23.37952], [27.33768, -23.40917], [26.99749, -23.65486], [26.84165, -24.24885], [26.51667, -24.47219], [26.46346, -24.60358], [26.39409, -24.63468], [25.8515, -24.75727], [25.84295, -24.78661], [25.88571, -24.87802], [25.72702, -25.25503], [25.69661, -25.29284], [25.6643, -25.4491], [25.58543, -25.6343], [25.33076, -25.76616], [25.12266, -25.75931], [25.01718, -25.72507], [24.8946, -25.80723], [24.67319, -25.81749], [24.44703, -25.73021], [24.36531, -25.773], [24.18287, -25.62916], [23.9244, -25.64286], [23.47588, -25.29971], [23.03497, -25.29971], [22.86012, -25.50572], [22.70808, -25.99186], [22.56365, -26.19668], [22.41921, -26.23078], [22.21206, -26.3773], [22.06192, -26.61882], [21.90703, -26.66808], [21.83291, -26.65959], [21.77114, -26.69015], [21.7854, -26.79199], [21.69322, -26.86152], [21.37869, -26.82083], [21.13353, -26.86661], [20.87031, -26.80047], [20.68596, -26.9039], [20.63275, -26.78181], [20.61754, -26.4692], [20.86081, -26.14892], [20.64795, -25.47827], [20.29826, -24.94869], [20.03678, -24.81004], [20.02809, -24.78725], [19.99817, -24.76768], [19.99882, -28.42622], [18.99885, -28.89165], [17.4579, -28.68718], [17.15405, -28.08573], [16.90446, -28.057], [16.59922, -28.53246], [16.46592, -28.57126], [16.45332, -28.63117], [12.51595, -32.27486], [38.88176, -48.03306], [34.51034, -26.91792], [32.35222, -26.86027], [32.29584, -26.852], [32.22302, -26.84136], [32.19409, -26.84032], [32.13315, -26.84345], [32.09664, -26.80721], [32.00893, -26.8096], [31.97463, -27.11057], [31.97592, -27.31675], [31.49834, -27.31549], [31.15027, -27.20151], [30.96088, -27.0245], [30.97757, -26.92706], [30.88826, -26.79622], [30.81101, -26.84722], [30.78927, -26.48271], [30.95819, -26.26303], [31.13073, -25.91558], [31.31237, -25.7431], [31.4175, -25.71886], [31.86881, -25.99973], [31.974, -25.95387], [31.92649, -25.84216], [32.00631, -25.65044], [31.97875, -25.46356], [32.01676, -25.38117], [32.03196, -25.10785], [31.9835, -24.29983], [31.90368, -24.18892], [31.87707, -23.95293], [31.77445, -23.90082], [31.70223, -23.72695], [31.67942, -23.60858], [31.56539, -23.47268], [31.55779, -23.176], [31.30611, -22.422]], [[29.33204, -29.45598], [29.28545, -29.58456], [29.12553, -29.76266], [29.16548, -29.91706], [28.9338, -30.05072], [28.80222, -30.10579], [28.68627, -30.12885], [28.399, -30.1592], [28.2319, -30.28476], [28.12073, -30.68072], [27.74814, -30.60635], [27.69467, -30.55862], [27.67819, -30.53437], [27.6521, -30.51707], [27.62137, -30.50509], [27.56781, -30.44562], [27.56901, -30.42504], [27.45452, -30.32239], [27.38108, -30.33456], [27.36649, -30.27246], [27.37293, -30.19401], [27.40778, -30.14577], [27.32555, -30.14785], [27.29603, -30.05473], [27.22719, -30.00718], [27.09489, -29.72796], [27.01016, -29.65439], [27.33464, -29.48161], [27.4358, -29.33465], [27.47254, -29.31968], [27.45125, -29.29708], [27.48679, -29.29349], [27.54258, -29.25575], [27.5158, -29.2261], [27.55974, -29.18954], [27.75458, -28.89839], [27.8907, -28.91612], [27.88933, -28.88156], [27.9392, -28.84864], [27.98675, -28.8787], [28.02503, -28.85991], [28.1317, -28.7293], [28.2348, -28.69471], [28.30518, -28.69531], [28.40612, -28.6215], [28.65091, -28.57025], [28.68043, -28.58744], [29.40524, -29.21246], [29.44883, -29.3772], [29.33204, -29.45598]]]]
+	  }
+	}, {
+	  type: "Feature",
+	  properties: {
+	    iso1A2: "ZM",
+	    iso1A3: "ZMB",
+	    iso1N3: "894",
+	    wikidata: "Q953",
+	    nameEn: "Zambia",
+	    groups: ["014", "202", "002", "UN"],
+	    driveSide: "left",
+	    callingCodes: ["260"]
+	  },
+	  geometry: {
+	    type: "MultiPolygon",
+	    coordinates: [[[[32.95389, -9.40138], [32.76233, -9.31963], [32.75611, -9.28583], [32.53661, -9.24281], [32.49147, -9.14754], [32.43543, -9.11988], [32.25486, -9.13371], [32.16146, -9.05993], [32.08206, -9.04609], [31.98866, -9.07069], [31.94196, -9.02303], [31.94663, -8.93846], [31.81587, -8.88618], [31.71158, -8.91386], [31.57147, -8.81388], [31.57147, -8.70619], [31.37533, -8.60769], [31.00796, -8.58615], [30.79243, -8.27382], [28.88917, -8.4831], [28.9711, -8.66935], [28.38526, -9.23393], [28.36562, -9.30091], [28.52636, -9.35379], [28.51627, -9.44726], [28.56208, -9.49122], [28.68532, -9.78], [28.62795, -9.92942], [28.65032, -10.65133], [28.37241, -11.57848], [28.48357, -11.87532], [29.18592, -12.37921], [29.4992, -12.43843], [29.48404, -12.23604], [29.8139, -12.14898], [29.81551, -13.44683], [29.65078, -13.41844], [29.60531, -13.21685], [29.01918, -13.41353], [28.33199, -12.41375], [27.59932, -12.22123], [27.21025, -11.76157], [27.22541, -11.60323], [27.04351, -11.61312], [26.88687, -12.01868], [26.01777, -11.91488], [25.33058, -11.65767], [25.34069, -11.19707], [24.42612, -11.44975], [24.34528, -11.06816], [24.00027, -10.89356], [24.02603, -11.15368], [23.98804, -12.13149], [24.06672, -12.29058], [23.90937, -12.844], [24.03339, -12.99091], [21.97988, -13.00148], [22.00323, -16.18028], [22.17217, -16.50269], [23.20038, -17.47563], [23.47474, -17.62877], [24.23619, -17.47489], [24.32811, -17.49082], [24.38712, -17.46818], [24.5621, -17.52963], [24.70864, -17.49501], [25.00198, -17.58221], [25.26433, -17.79571], [25.51646, -17.86232], [25.6827, -17.81987], [25.85738, -17.91403], [25.85892, -17.97726], [26.08925, -17.98168], [26.0908, -17.93021], [26.21601, -17.88608], [26.55918, -17.99638], [26.68403, -18.07411], [26.74314, -18.0199], [26.89926, -17.98756], [27.14196, -17.81398], [27.30736, -17.60487], [27.61377, -17.34378], [27.62795, -17.24365], [27.83141, -16.96274], [28.73725, -16.5528], [28.76199, -16.51575], [28.81454, -16.48611], [28.8501, -16.04537], [28.9243, -15.93987], [29.01298, -15.93805], [29.21955, -15.76589], [29.4437, -15.68702], [29.8317, -15.6126], [30.35574, -15.6513], [30.41902, -15.62269], [30.22098, -14.99447], [33.24249, -14.00019], [33.16749, -13.93992], [33.07568, -13.98447], [33.02977, -14.05022], [32.99042, -13.95689], [32.88985, -13.82956], [32.79015, -13.80755], [32.76962, -13.77224], [32.84528, -13.71576], [32.7828, -13.64805], [32.68654, -13.64268], [32.66468, -13.60019], [32.68436, -13.55769], [32.73683, -13.57682], [32.84176, -13.52794], [32.86113, -13.47292], [33.0078, -13.19492], [32.98289, -13.12671], [33.02181, -12.88707], [32.96733, -12.88251], [32.94397, -12.76868], [33.05917, -12.59554], [33.18837, -12.61377], [33.28177, -12.54692], [33.37517, -12.54085], [33.54485, -12.35996], [33.47636, -12.32498], [33.3705, -12.34931], [33.25998, -12.14242], [33.33937, -11.91252], [33.32692, -11.59248], [33.24252, -11.59302], [33.23663, -11.40637], [33.29267, -11.43536], [33.29267, -11.3789], [33.39697, -11.15296], [33.25998, -10.88862], [33.28022, -10.84428], [33.47636, -10.78465], [33.70675, -10.56896], [33.54797, -10.36077], [33.53863, -10.20148], [33.31297, -10.05133], [33.37902, -9.9104], [33.36581, -9.81063], [33.31517, -9.82364], [33.2095, -9.61099], [33.12144, -9.58929], [33.10163, -9.66525], [33.05485, -9.61316], [33.00256, -9.63053], [33.00476, -9.5133], [32.95389, -9.40138]]]]
+	  }
+	}, {
+	  type: "Feature",
+	  properties: {
+	    iso1A2: "ZW",
+	    iso1A3: "ZWE",
+	    iso1N3: "716",
+	    wikidata: "Q954",
+	    nameEn: "Zimbabwe",
+	    groups: ["014", "202", "002", "UN"],
+	    driveSide: "left",
+	    callingCodes: ["263"]
+	  },
+	  geometry: {
+	    type: "MultiPolygon",
+	    coordinates: [[[[30.41902, -15.62269], [30.35574, -15.6513], [29.8317, -15.6126], [29.4437, -15.68702], [29.21955, -15.76589], [29.01298, -15.93805], [28.9243, -15.93987], [28.8501, -16.04537], [28.81454, -16.48611], [28.76199, -16.51575], [28.73725, -16.5528], [27.83141, -16.96274], [27.62795, -17.24365], [27.61377, -17.34378], [27.30736, -17.60487], [27.14196, -17.81398], [26.89926, -17.98756], [26.74314, -18.0199], [26.68403, -18.07411], [26.55918, -17.99638], [26.21601, -17.88608], [26.0908, -17.93021], [26.08925, -17.98168], [25.85892, -17.97726], [25.85738, -17.91403], [25.6827, -17.81987], [25.51646, -17.86232], [25.26433, -17.79571], [25.23909, -17.90832], [25.31799, -18.07091], [25.39972, -18.12691], [25.53465, -18.39041], [25.68859, -18.56165], [25.79217, -18.6355], [25.82353, -18.82808], [25.94326, -18.90362], [25.99837, -19.02943], [25.96226, -19.08152], [26.17227, -19.53709], [26.72246, -19.92707], [27.21278, -20.08244], [27.29831, -20.28935], [27.28865, -20.49873], [27.69361, -20.48531], [27.72972, -20.51735], [27.69171, -21.08409], [27.91407, -21.31621], [28.01669, -21.57624], [28.29416, -21.59037], [28.49942, -21.66634], [28.58114, -21.63455], [29.07763, -21.81877], [29.04023, -21.85864], [29.02191, -21.90647], [29.02191, -21.95665], [29.04108, -22.00563], [29.08495, -22.04867], [29.14501, -22.07275], [29.1974, -22.07472], [29.24648, -22.05967], [29.3533, -22.18363], [29.37703, -22.19581], [29.64609, -22.12917], [29.76848, -22.14128], [29.92242, -22.19408], [30.13147, -22.30841], [30.2265, -22.2961], [30.28351, -22.35587], [30.38614, -22.34533], [30.48686, -22.31368], [30.6294, -22.32599], [30.86696, -22.28907], [31.08932, -22.34884], [31.16344, -22.32599], [31.30611, -22.422], [31.38336, -22.36919], [32.41234, -21.31246], [32.48236, -21.32873], [32.37115, -21.133], [32.51644, -20.91929], [32.48122, -20.63319], [32.55167, -20.56312], [32.66174, -20.56106], [32.85987, -20.27841], [32.85987, -20.16686], [32.93032, -20.03868], [33.01178, -20.02007], [33.06461, -19.77787], [32.95013, -19.67219], [32.84666, -19.68462], [32.84446, -19.48343], [32.78282, -19.47513], [32.77966, -19.36098], [32.85107, -19.29238], [32.87088, -19.09279], [32.84006, -19.0262], [32.72118, -19.02204], [32.69917, -18.94293], [32.73439, -18.92628], [32.70137, -18.84712], [32.82465, -18.77419], [32.9017, -18.7992], [32.95013, -18.69079], [32.88629, -18.58023], [32.88629, -18.51344], [33.02278, -18.4696], [33.03159, -18.35054], [32.94133, -17.99705], [33.0492, -17.60298], [32.98536, -17.55891], [32.96554, -17.48964], [33.0426, -17.3468], [33.00517, -17.30477], [32.96554, -17.11971], [32.84113, -16.92259], [32.91051, -16.89446], [32.97655, -16.70689], [32.78943, -16.70267], [32.69917, -16.66893], [32.71017, -16.59932], [32.42838, -16.4727], [32.28529, -16.43892], [32.02772, -16.43892], [31.91324, -16.41569], [31.90223, -16.34388], [31.67988, -16.19595], [31.42451, -16.15154], [31.30563, -16.01193], [31.13171, -15.98019], [30.97761, -16.05848], [30.91597, -15.99924], [30.42568, -15.9962], [30.41902, -15.62269]]]]
 	  }
+	}];
+	var borders_default = {
+	  type: type,
+	  features: features
+	}; // src/country-coder.ts
+
+	var borders = borders_default;
+	var whichPolygonGetter = {};
+	var featuresByCode = {};
+	var idFilterRegex = /(?=(?!^(and|the|of|el|la|de)$))(\b(and|the|of|el|la|de)\b)|[-_ .,'()&[\]/]/gi;
+
+	function canonicalID(id) {
+	  var s = id || "";
 
-	  function linkEntity(d) {
-	    return ("<a class=\"error_entity_link\">" + d + "</a>");
+	  if (s.charAt(0) === ".") {
+	    return s.toUpperCase();
+	  } else {
+	    return s.replace(idFilterRegex, "").toUpperCase();
 	  }
+	}
 
-	  function linkURL(d) {
-	    return ("<a class=\"kr_external_link\" target=\"_blank\" href=\"" + d + "\">" + d + "</a>");
-	  }
+	var levels = ["subterritory", "territory", "subcountryGroup", "country", "sharedLandform", "intermediateRegion", "subregion", "region", "subunion", "union", "unitedNations", "world"];
+	loadDerivedDataAndCaches(borders);
 
-	  // arbitrary node list of form: #ID, #ID, #ID...
-	  function parse211(capture) {
-	    var newList = [];
-	    var items = capture.split(', ');
+	function loadDerivedDataAndCaches(borders2) {
+	  var identifierProps = ["iso1A2", "iso1A3", "m49", "wikidata", "emojiFlag", "ccTLD", "nameEn"];
+	  var geometryFeatures = [];
 
-	    items.forEach(function (item) {
-	      // ID has # at the front
-	      var id = linkEntity('n' + item.slice(1));
-	      newList.push(id);
+	  for (var i in borders2.features) {
+	    var feature2 = borders2.features[i];
+	    feature2.properties.id = feature2.properties.iso1A2 || feature2.properties.m49 || feature2.properties.wikidata;
+	    loadM49(feature2);
+	    loadTLD(feature2);
+	    loadIsoStatus(feature2);
+	    loadLevel(feature2);
+	    loadGroups(feature2);
+	    loadFlag(feature2);
+	    cacheFeatureByIDs(feature2);
+	    if (feature2.geometry) geometryFeatures.push(feature2);
+	  }
+
+	  for (var _i in borders2.features) {
+	    var _feature = borders2.features[_i];
+	    _feature.properties.groups = _feature.properties.groups.map(function (groupID) {
+	      return featuresByCode[groupID].properties.id;
 	    });
+	    loadMembersForGroupsOf(_feature);
+	  }
 
-	    return newList.join(', ');
+	  for (var _i2 in borders2.features) {
+	    var _feature2 = borders2.features[_i2];
+	    loadRoadSpeedUnit(_feature2);
+	    loadRoadHeightUnit(_feature2);
+	    loadDriveSide(_feature2);
+	    loadCallingCodes(_feature2);
+	    loadGroupGroups(_feature2);
 	  }
 
-	  // arbitrary way list of form: #ID(layer),#ID(layer),#ID(layer)...
-	  function parse231(capture) {
-	    var newList = [];
-	    // unfortunately 'layer' can itself contain commas, so we split on '),'
-	    var items = capture.split('),');
+	  for (var _i3 in borders2.features) {
+	    var _feature3 = borders2.features[_i3];
 
-	    items.forEach(function (item) {
-	      var match = item.match(/\#(\d+)\((.+)\)?/);
-	      if (match !== null && match.length > 2) {
-	        newList.push(linkEntity('w' + match[1]) + ' ' +
-	          _t('QA.keepRight.errorTypes.231.layer', { layer: match[2] })
-	        );
-	      }
+	    _feature3.properties.groups.sort(function (groupID1, groupID2) {
+	      return levels.indexOf(featuresByCode[groupID1].properties.level) - levels.indexOf(featuresByCode[groupID2].properties.level);
 	    });
 
-	    return newList.join(', ');
-	  }
+	    if (_feature3.properties.members) _feature3.properties.members.sort(function (id1, id2) {
+	      var diff = levels.indexOf(featuresByCode[id1].properties.level) - levels.indexOf(featuresByCode[id2].properties.level);
 
-	  // arbitrary node/relation list of form: from node #ID,to relation #ID,to node #ID...
-	  function parse294(capture) {
-	    var newList = [];
-	    var items = capture.split(',');
+	      if (diff === 0) {
+	        return borders2.features.indexOf(featuresByCode[id1]) - borders2.features.indexOf(featuresByCode[id2]);
+	      }
 
-	    items.forEach(function (item) {
-	      // item of form "from/to node/relation #ID"
-	      item = item.split(' ');
+	      return diff;
+	    });
+	  }
 
-	      // to/from role is more clear in quotes
-	      var role = "\"" + (item[0]) + "\"";
+	  var geometryOnlyCollection = {
+	    type: "FeatureCollection",
+	    features: geometryFeatures
+	  };
+	  whichPolygonGetter = whichPolygon_1(geometryOnlyCollection);
 
-	      // first letter of node/relation provides the type
-	      var idType = item[1].slice(0,1);
+	  function loadGroups(feature2) {
+	    var props = feature2.properties;
 
-	      // ID has # at the front
-	      var id = item[2].slice(1);
-	      id = linkEntity(idType + id);
+	    if (!props.groups) {
+	      props.groups = [];
+	    }
 
-	      newList.push((role + " " + (item[1]) + " " + id));
-	    });
+	    if (feature2.geometry && props.country) {
+	      props.groups.push(props.country);
+	    }
 
-	    return newList.join(', ');
+	    if (props.m49 !== "001") {
+	      props.groups.push("001");
+	    }
 	  }
 
-	  // may or may not include the string "(including the name 'name')"
-	  function parse370(capture) {
-	    if (!capture) { return ''; }
+	  function loadM49(feature2) {
+	    var props = feature2.properties;
 
-	    var match = capture.match(/\(including the name (\'.+\')\)/);
-	    if (match && match.length) {
-	      return _t('QA.keepRight.errorTypes.370.including_the_name', { name: match[1] });
+	    if (!props.m49 && props.iso1N3) {
+	      props.m49 = props.iso1N3;
 	    }
-	    return '';
 	  }
 
-	  // arbitrary node list of form: #ID,#ID,#ID...
-	  function parse20(capture) {
-	    var newList = [];
-	    var items = capture.split(',');
-
-	    items.forEach(function (item) {
-	      // ID has # at the front
-	      var id = linkEntity('n' + item.slice(1));
-	      newList.push(id);
-	    });
+	  function loadTLD(feature2) {
+	    var props = feature2.properties;
+	    if (props.level === "unitedNations") return;
 
-	    return newList.join(', ');
+	    if (!props.ccTLD && props.iso1A2) {
+	      props.ccTLD = "." + props.iso1A2.toLowerCase();
+	    }
 	  }
-	}
-
 
-	var serviceKeepRight = {
-	  title: 'keepRight',
-
-	  init: function init() {
-	    _mainFileFetcher.get('keepRight')
-	      .then(function (d) { return _krData = d; });
+	  function loadIsoStatus(feature2) {
+	    var props = feature2.properties;
 
-	    if (!_cache) {
-	      this.reset();
+	    if (!props.isoStatus && props.iso1A2) {
+	      props.isoStatus = "official";
 	    }
+	  }
 
-	    this.event = utilRebind(this, dispatch$1, 'on');
-	  },
+	  function loadLevel(feature2) {
+	    var props = feature2.properties;
+	    if (props.level) return;
 
-	  reset: function reset() {
-	    if (_cache) {
-	      Object.values(_cache.inflightTile).forEach(abortRequest);
+	    if (!props.country) {
+	      props.level = "country";
+	    } else if (!props.iso1A2 || props.isoStatus === "official") {
+	      props.level = "territory";
+	    } else {
+	      props.level = "subterritory";
 	    }
+	  }
 
-	    _cache = {
-	      data: {},
-	      loadedTile: {},
-	      inflightTile: {},
-	      inflightPost: {},
-	      closed: {},
-	      rtree: new RBush()
-	    };
-	  },
-
+	  function loadGroupGroups(feature2) {
+	    var props = feature2.properties;
+	    if (feature2.geometry || !props.members) return;
+	    var featureLevelIndex = levels.indexOf(props.level);
+	    var sharedGroups = [];
 
-	  // KeepRight API:  http://osm.mueschelsoft.de/keepright/interfacing.php
-	  loadIssues: function loadIssues(projection) {
-	    var this$1 = this;
+	    var _loop = function _loop(_i4) {
+	      var memberID = props.members[_i4];
+	      var member = featuresByCode[memberID];
+	      var memberGroups = member.properties.groups.filter(function (groupID) {
+	        return groupID !== feature2.properties.id && featureLevelIndex < levels.indexOf(featuresByCode[groupID].properties.level);
+	      });
 
-	    var options = {
-	      format: 'geojson',
-	      ch: _krRuleset
+	      if (_i4 === "0") {
+	        sharedGroups = memberGroups;
+	      } else {
+	        sharedGroups = sharedGroups.filter(function (groupID) {
+	          return memberGroups.indexOf(groupID) !== -1;
+	        });
+	      }
 	    };
 
-	    // determine the needed tiles to cover the view
-	    var tiles = tiler
-	      .zoomExtent([_tileZoom, _tileZoom])
-	      .getTiles(projection);
+	    for (var _i4 in props.members) {
+	      _loop(_i4);
+	    }
 
-	    // abort inflight requests that are no longer needed
-	    abortUnwantedRequests(_cache, tiles);
+	    props.groups = props.groups.concat(sharedGroups.filter(function (groupID) {
+	      return props.groups.indexOf(groupID) === -1;
+	    }));
 
-	    // issue new requests..
-	    tiles.forEach(function (tile) {
-	      if (_cache.loadedTile[tile.id] || _cache.inflightTile[tile.id]) { return; }
-
-	      var ref = tile.extent.rectangle();
-	      var left = ref[0];
-	      var top = ref[1];
-	      var right = ref[2];
-	      var bottom = ref[3];
-	      var params = Object.assign({}, options, { left: left, bottom: bottom, right: right, top: top });
-	      var url = _krUrlRoot + "/export.php?" + utilQsString(params);
-	      var controller = new AbortController();
+	    for (var j in sharedGroups) {
+	      var groupFeature = featuresByCode[sharedGroups[j]];
 
-	      _cache.inflightTile[tile.id] = controller;
+	      if (groupFeature.properties.members.indexOf(props.id) === -1) {
+	        groupFeature.properties.members.push(props.id);
+	      }
+	    }
+	  }
 
-	      d3_json(url, { signal: controller.signal })
-	        .then(function (data) {
-	          delete _cache.inflightTile[tile.id];
-	          _cache.loadedTile[tile.id] = true;
-	          if (!data || !data.features || !data.features.length) {
-	            throw new Error('No Data');
-	          }
+	  function loadRoadSpeedUnit(feature2) {
+	    var props = feature2.properties;
 
-	          data.features.forEach(function (feature) {
-	            var feature_properties = feature.properties;
-	            var itemType = feature_properties.error_type;
-	            var id = feature_properties.error_id;
-	            var comment = feature_properties.comment; if ( comment === void 0 ) comment = null;
-	            var objectId = feature_properties.object_id;
-	            var objectType = feature_properties.object_type;
-	            var schema = feature_properties.schema;
-	            var title = feature_properties.title;
-	            var loc = feature.geometry.coordinates;
-	            var description = feature.properties.description; if ( description === void 0 ) description = '';
-
-	            // if there is a parent, save its error type e.g.:
-	            //  Error 191 = "highway-highway"
-	            //  Error 190 = "intersections without junctions"  (parent)
-	            var issueTemplate = _krData.errorTypes[itemType];
-	            var parentIssueType = (Math.floor(itemType / 10) * 10).toString();
-
-	            // try to handle error type directly, fallback to parent error type.
-	            var whichType = issueTemplate ? itemType : parentIssueType;
-	            var whichTemplate = _krData.errorTypes[whichType];
-
-	            // Rewrite a few of the errors at this point..
-	            // This is done to make them easier to linkify and translate.
-	            switch (whichType) {
-	              case '170':
-	                description = "This feature has a FIXME tag: " + description;
-	                break;
-	              case '292':
-	              case '293':
-	                description = description.replace('A turn-', 'This turn-');
-	                break;
-	              case '294':
-	              case '295':
-	              case '296':
-	              case '297':
-	              case '298':
-	                description = "This turn-restriction~" + description;
-	                break;
-	              case '300':
-	                description = 'This highway is missing a maxspeed tag';
-	                break;
-	              case '411':
-	              case '412':
-	              case '413':
-	                description = "This feature~" + description;
-	                break;
-	            }
+	    if (feature2.geometry) {
+	      if (!props.roadSpeedUnit) props.roadSpeedUnit = "km/h";
+	    } else if (props.members) {
+	      var vals = Array.from(new Set(props.members.map(function (id) {
+	        var member = featuresByCode[id];
+	        if (member.geometry) return member.properties.roadSpeedUnit || "km/h";
+	      }).filter(Boolean)));
+	      if (vals.length === 1) props.roadSpeedUnit = vals[0];
+	    }
+	  }
 
-	            // move markers slightly so it doesn't obscure the geometry,
-	            // then move markers away from other coincident markers
-	            var coincident = false;
-	            do {
-	              // first time, move marker up. after that, move marker right.
-	              var delta = coincident ? [0.00001, 0] : [0, 0.00001];
-	              loc = geoVecAdd(loc, delta);
-	              var bbox = geoExtent(loc).bbox();
-	              coincident = _cache.rtree.search(bbox).length;
-	            } while (coincident);
-
-	            var d = new QAItem(loc, this$1, itemType, id, {
-	              comment: comment,
-	              description: description,
-	              whichType: whichType,
-	              parentIssueType: parentIssueType,
-	              severity: whichTemplate.severity || 'error',
-	              objectId: objectId,
-	              objectType: objectType,
-	              schema: schema,
-	              title: title
-	            });
+	  function loadRoadHeightUnit(feature2) {
+	    var props = feature2.properties;
 
-	            d.replacements = tokenReplacements(d);
+	    if (feature2.geometry) {
+	      if (!props.roadHeightUnit) props.roadHeightUnit = "m";
+	    } else if (props.members) {
+	      var vals = Array.from(new Set(props.members.map(function (id) {
+	        var member = featuresByCode[id];
+	        if (member.geometry) return member.properties.roadHeightUnit || "m";
+	      }).filter(Boolean)));
+	      if (vals.length === 1) props.roadHeightUnit = vals[0];
+	    }
+	  }
 
-	            _cache.data[id] = d;
-	            _cache.rtree.insert(encodeIssueRtree(d));
-	          });
+	  function loadDriveSide(feature2) {
+	    var props = feature2.properties;
 
-	          dispatch$1.call('loaded');
-	        })
-	        .catch(function () {
-	          delete _cache.inflightTile[tile.id];
-	          _cache.loadedTile[tile.id] = true;
-	        });
+	    if (feature2.geometry) {
+	      if (!props.driveSide) props.driveSide = "right";
+	    } else if (props.members) {
+	      var vals = Array.from(new Set(props.members.map(function (id) {
+	        var member = featuresByCode[id];
+	        if (member.geometry) return member.properties.driveSide || "right";
+	      }).filter(Boolean)));
+	      if (vals.length === 1) props.driveSide = vals[0];
+	    }
+	  }
 
-	    });
-	  },
+	  function loadCallingCodes(feature2) {
+	    var props = feature2.properties;
 
+	    if (!feature2.geometry && props.members) {
+	      props.callingCodes = Array.from(new Set(props.members.reduce(function (array, id) {
+	        var member = featuresByCode[id];
+	        if (member.geometry && member.properties.callingCodes) return array.concat(member.properties.callingCodes);
+	        return array;
+	      }, [])));
+	    }
+	  }
 
-	  postUpdate: function postUpdate(d, callback) {
-	    var this$1 = this;
+	  function loadFlag(feature2) {
+	    if (!feature2.properties.iso1A2) return;
+	    var flag = feature2.properties.iso1A2.replace(/./g, function (_char) {
+	      return String.fromCodePoint(_char.charCodeAt(0) + 127397);
+	    });
+	    feature2.properties.emojiFlag = flag;
+	  }
 
-	    if (_cache.inflightPost[d.id]) {
-	      return callback({ message: 'Error update already inflight', status: -2 }, d);
+	  function loadMembersForGroupsOf(feature2) {
+	    for (var j in feature2.properties.groups) {
+	      var groupID = feature2.properties.groups[j];
+	      var groupFeature = featuresByCode[groupID];
+	      if (!groupFeature.properties.members) groupFeature.properties.members = [];
+	      groupFeature.properties.members.push(feature2.properties.id);
 	    }
+	  }
 
-	    var params = { schema: d.schema, id: d.id };
+	  function cacheFeatureByIDs(feature2) {
+	    var ids = [];
 
-	    if (d.newStatus) {
-	      params.st = d.newStatus;
-	    }
-	    if (d.newComment !== undefined) {
-	      params.co = d.newComment;
+	    for (var k in identifierProps) {
+	      var prop = identifierProps[k];
+	      var id = feature2.properties[prop];
+	      if (id) ids.push(id);
 	    }
 
-	    // NOTE: This throws a CORS err, but it seems successful.
-	    // We don't care too much about the response, so this is fine.
-	    var url = _krUrlRoot + "/comment.php?" + utilQsString(params);
-	    var controller = new AbortController();
-
-	    _cache.inflightPost[d.id] = controller;
+	    if (feature2.properties.aliases) {
+	      for (var j in feature2.properties.aliases) {
+	        ids.push(feature2.properties.aliases[j]);
+	      }
+	    }
 
-	    // Since this is expected to throw an error just continue as if it worked
-	    // (worst case scenario the request truly fails and issue will show up if iD restarts)
-	    d3_json(url, { signal: controller.signal })
-	      .finally(function () {
-	        delete _cache.inflightPost[d.id];
-
-	        if (d.newStatus === 'ignore') {
-	          // ignore permanently (false positive)
-	          this$1.removeItem(d);
-	        } else if (d.newStatus === 'ignore_t') {
-	          // ignore temporarily (error fixed)
-	          this$1.removeItem(d);
-	          _cache.closed[((d.schema) + ":" + (d.id))] = true;
-	        } else {
-	          d = this$1.replaceItem(d.update({
-	            comment: d.newComment,
-	            newComment: undefined,
-	            newState: undefined
-	          }));
-	        }
+	    for (var _i5 in ids) {
+	      var _id = canonicalID(ids[_i5]);
 
-	        if (callback) { callback(null, d); }
-	      });
-	  },
+	      featuresByCode[_id] = feature2;
+	    }
+	  }
+	}
 
-	  // Get all cached QAItems covering the viewport
-	  getItems: function getItems(projection) {
-	    var viewport = projection.clipExtent();
-	    var min = [viewport[0][0], viewport[1][1]];
-	    var max = [viewport[1][0], viewport[0][1]];
-	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	function locArray(loc) {
+	  if (Array.isArray(loc)) {
+	    return loc;
+	  } else if (loc.coordinates) {
+	    return loc.coordinates;
+	  }
 
-	    return _cache.rtree.search(bbox).map(function (d) { return d.data; });
-	  },
+	  return loc.geometry.coordinates;
+	}
 
-	  // Get a QAItem from cache
-	  // NOTE: Don't change method name until UI v3 is merged
-	  getError: function getError(id) {
-	    return _cache.data[id];
-	  },
+	function smallestFeature(loc) {
+	  var query = locArray(loc);
+	  var featureProperties = whichPolygonGetter(query);
+	  if (!featureProperties) return null;
+	  return featuresByCode[featureProperties.id];
+	}
 
-	  // Replace a single QAItem in the cache
-	  replaceItem: function replaceItem(item) {
-	    if (!(item instanceof QAItem) || !item.id) { return; }
+	function countryFeature(loc) {
+	  var feature2 = smallestFeature(loc);
+	  if (!feature2) return null;
+	  var countryCode = feature2.properties.country || feature2.properties.iso1A2;
+	  return featuresByCode[countryCode] || null;
+	}
 
-	    _cache.data[item.id] = item;
-	    updateRtree(encodeIssueRtree(item), true); // true = replace
-	    return item;
-	  },
+	var defaultOpts = {
+	  level: void 0,
+	  maxLevel: void 0,
+	  withProp: void 0
+	};
 
-	  // Remove a single QAItem from the cache
-	  removeItem: function removeItem(item) {
-	    if (!(item instanceof QAItem) || !item.id) { return; }
+	function featureForLoc(loc, opts) {
+	  var targetLevel = opts.level || "country";
+	  var maxLevel = opts.maxLevel || "world";
+	  var withProp = opts.withProp;
+	  var targetLevelIndex = levels.indexOf(targetLevel);
+	  if (targetLevelIndex === -1) return null;
+	  var maxLevelIndex = levels.indexOf(maxLevel);
+	  if (maxLevelIndex === -1) return null;
+	  if (maxLevelIndex < targetLevelIndex) return null;
+
+	  if (targetLevel === "country") {
+	    var fastFeature = countryFeature(loc);
+
+	    if (fastFeature) {
+	      if (!withProp || fastFeature.properties[withProp]) {
+	        return fastFeature;
+	      }
+	    }
+	  }
 
-	    delete _cache.data[item.id];
-	    updateRtree(encodeIssueRtree(item), false); // false = remove
-	  },
+	  var features2 = featuresContaining(loc);
 
-	  issueURL: function issueURL(item) {
-	    return (_krUrlRoot + "/report_map.php?schema=" + (item.schema) + "&error=" + (item.id));
-	  },
+	  for (var i in features2) {
+	    var feature2 = features2[i];
+	    var levelIndex = levels.indexOf(feature2.properties.level);
 
-	  // Get an array of issues closed during this session.
-	  // Used to populate `closed:keepright` changeset tag
-	  getClosedIDs: function getClosedIDs() {
-	    return Object.keys(_cache.closed).sort();
+	    if (feature2.properties.level === targetLevel || levelIndex > targetLevelIndex && levelIndex <= maxLevelIndex) {
+	      if (!withProp || feature2.properties[withProp]) {
+	        return feature2;
+	      }
+	    }
 	  }
 
-	};
-
-	var tiler$1 = utilTiler();
-	var dispatch$2 = dispatch('loaded');
-	var _tileZoom$1 = 14;
-	var _impOsmUrls = {
-	  ow: 'https://grab.community.improve-osm.org/directionOfFlowService',
-	  mr: 'https://grab.community.improve-osm.org/missingGeoService',
-	  tr: 'https://grab.community.improve-osm.org/turnRestrictionService'
-	};
-	var _impOsmData = { icons: {} };
+	  return null;
+	}
 
+	function featureForID(id) {
+	  var stringID;
 
-	// This gets reassigned if reset
-	var _cache$1;
+	  if (typeof id === "number") {
+	    stringID = id.toString();
 
-	function abortRequest$1(i) {
-	  Object.values(i).forEach(function (controller) {
-	    if (controller) {
-	      controller.abort();
+	    if (stringID.length === 1) {
+	      stringID = "00" + stringID;
+	    } else if (stringID.length === 2) {
+	      stringID = "0" + stringID;
 	    }
-	  });
+	  } else {
+	    stringID = canonicalID(id);
+	  }
+
+	  return featuresByCode[stringID] || null;
 	}
 
-	function abortUnwantedRequests$1(cache, tiles) {
-	  Object.keys(cache.inflightTile).forEach(function (k) {
-	    var wanted = tiles.find(function (tile) { return k === tile.id; });
-	    if (!wanted) {
-	      abortRequest$1(cache.inflightTile[k]);
-	      delete cache.inflightTile[k];
-	    }
+	function smallestFeaturesForBbox(bbox) {
+	  return whichPolygonGetter.bbox(bbox).map(function (props) {
+	    return featuresByCode[props.id];
 	  });
 	}
 
-	function encodeIssueRtree$1(d) {
-	  return { minX: d.loc[0], minY: d.loc[1], maxX: d.loc[0], maxY: d.loc[1], data: d };
+	function smallestOrMatchingFeature(query) {
+	  if (_typeof(query) === "object") {
+	    return smallestFeature(query);
+	  }
+
+	  return featureForID(query);
 	}
 
-	// Replace or remove QAItem from rtree
-	function updateRtree$1(item, replace) {
-	  _cache$1.rtree.remove(item, function (a, b) { return a.data.id === b.data.id; });
+	function feature$1(query) {
+	  var opts = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : defaultOpts;
 
-	  if (replace) {
-	    _cache$1.rtree.insert(item);
+	  if (_typeof(query) === "object") {
+	    return featureForLoc(query, opts);
 	  }
-	}
 
-	function linkErrorObject(d) {
-	  return ("<a class=\"error_object_link\">" + d + "</a>");
+	  return featureForID(query);
 	}
 
-	function linkEntity(d) {
-	  return ("<a class=\"error_entity_link\">" + d + "</a>");
+	function iso1A2Code(query) {
+	  var opts = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : defaultOpts;
+	  opts.withProp = "iso1A2";
+	  var match = feature$1(query, opts);
+	  if (!match) return null;
+	  return match.properties.iso1A2 || null;
 	}
 
-	function pointAverage(points) {
-	  if (points.length) {
-	    var sum = points.reduce(
-	      function (acc, point) { return geoVecAdd(acc, [point.lon, point.lat]); },
-	      [0,0]
-	    );
-	    return geoVecScale(sum, 1 / points.length);
+	function featuresContaining(query, strict) {
+	  var matchingFeatures;
+
+	  if (Array.isArray(query) && query.length === 4) {
+	    matchingFeatures = smallestFeaturesForBbox(query);
+	  } else {
+	    var smallestOrMatching = smallestOrMatchingFeature(query);
+	    matchingFeatures = smallestOrMatching ? [smallestOrMatching] : [];
+	  }
+
+	  if (!matchingFeatures.length) return [];
+	  var returnFeatures;
+
+	  if (!strict || _typeof(query) === "object") {
+	    returnFeatures = matchingFeatures.slice();
 	  } else {
-	    return [0,0];
+	    returnFeatures = [];
+	  }
+
+	  for (var j in matchingFeatures) {
+	    var properties = matchingFeatures[j].properties;
+
+	    for (var i in properties.groups) {
+	      var groupID = properties.groups[i];
+	      var groupFeature = featuresByCode[groupID];
+
+	      if (returnFeatures.indexOf(groupFeature) === -1) {
+	        returnFeatures.push(groupFeature);
+	      }
+	    }
 	  }
+
+	  return returnFeatures;
 	}
 
-	function relativeBearing(p1, p2) {
-	  var angle = Math.atan2(p2.lon - p1.lon, p2.lat - p1.lat);
-	  if (angle < 0) {
-	    angle += 2 * Math.PI;
+	function featuresIn(id, strict) {
+	  var feature2 = featureForID(id);
+	  if (!feature2) return [];
+	  var features2 = [];
+
+	  if (!strict) {
+	    features2.push(feature2);
 	  }
 
-	  // Return degrees
-	  return angle * 180 / Math.PI;
+	  var properties = feature2.properties;
+
+	  if (properties.members) {
+	    for (var i in properties.members) {
+	      var memberID = properties.members[i];
+	      features2.push(featuresByCode[memberID]);
+	    }
+	  }
+
+	  return features2;
 	}
 
-	// Assuming range [0,360)
-	function cardinalDirection(bearing) {
-	  var dir = 45 * Math.round(bearing / 45);
-	  var compass = {
-	    0: 'north',
-	    45: 'northeast',
-	    90: 'east',
-	    135: 'southeast',
-	    180: 'south',
-	    225: 'southwest',
-	    270: 'west',
-	    315: 'northwest',
-	    360: 'north'
-	  };
+	function aggregateFeature(id) {
+	  var features2 = featuresIn(id, false);
+	  if (features2.length === 0) return null;
+	  var aggregateCoordinates = [];
+
+	  for (var i in features2) {
+	    var feature2 = features2[i];
+
+	    if (feature2.geometry && feature2.geometry.type === "MultiPolygon" && feature2.geometry.coordinates) {
+	      aggregateCoordinates = aggregateCoordinates.concat(feature2.geometry.coordinates);
+	    }
+	  }
 
-	  return _t(("QA.improveOSM.directions." + (compass[dir])));
+	  return {
+	    type: "Feature",
+	    properties: features2[0].properties,
+	    geometry: {
+	      type: "MultiPolygon",
+	      coordinates: aggregateCoordinates
+	    }
+	  };
 	}
 
-	// Errors shouldn't obscure each other
-	function preventCoincident(loc, bumpUp) {
-	  var coincident = false;
-	  do {
-	    // first time, move marker up. after that, move marker right.
-	    var delta = coincident ? [0.00001, 0] : (bumpUp ? [0, 0.00001] : [0, 0]);
-	    loc = geoVecAdd(loc, delta);
-	    var bbox = geoExtent(loc).bbox();
-	    coincident = _cache$1.rtree.search(bbox).length;
-	  } while (coincident);
+	function roadSpeedUnit(query) {
+	  var feature2 = smallestOrMatchingFeature(query);
+	  return feature2 && feature2.properties.roadSpeedUnit || null;
+	}
 
-	  return loc;
+	function roadHeightUnit(query) {
+	  var feature2 = smallestOrMatchingFeature(query);
+	  return feature2 && feature2.properties.roadHeightUnit || null;
 	}
 
-	var serviceImproveOSM = {
-	  title: 'improveOSM',
+	var geojsonArea = {};
 
-	  init: function init() {
-	    _mainFileFetcher.get('qa_data')
-	      .then(function (d) { return _impOsmData = d.improveOSM; });
+	var wgs84$1 = {};
 
-	    if (!_cache$1) {
-	      this.reset();
-	    }
+	wgs84$1.RADIUS = 6378137;
+	wgs84$1.FLATTENING = 1 / 298.257223563;
+	wgs84$1.POLAR_RADIUS = 6356752.3142;
 
-	    this.event = utilRebind(this, dispatch$2, 'on');
-	  },
+	var wgs84 = wgs84$1;
+	geojsonArea.geometry = geometry;
+	geojsonArea.ring = ringArea;
 
-	  reset: function reset() {
-	    if (_cache$1) {
-	      Object.values(_cache$1.inflightTile).forEach(abortRequest$1);
-	    }
-	    _cache$1 = {
-	      data: {},
-	      loadedTile: {},
-	      inflightTile: {},
-	      inflightPost: {},
-	      closed: {},
-	      rtree: new RBush()
-	    };
-	  },
+	function geometry(_) {
+	  var area = 0,
+	      i;
 
-	  loadIssues: function loadIssues(projection) {
-	    var this$1 = this;
+	  switch (_.type) {
+	    case 'Polygon':
+	      return polygonArea(_.coordinates);
 
-	    var options = {
-	      client: 'iD',
-	      status: 'OPEN',
-	      zoom: '19' // Use a high zoom so that clusters aren't returned
-	    };
+	    case 'MultiPolygon':
+	      for (i = 0; i < _.coordinates.length; i++) {
+	        area += polygonArea(_.coordinates[i]);
+	      }
 
-	    // determine the needed tiles to cover the view
-	    var tiles = tiler$1
-	      .zoomExtent([_tileZoom$1, _tileZoom$1])
-	      .getTiles(projection);
+	      return area;
 
-	    // abort inflight requests that are no longer needed
-	    abortUnwantedRequests$1(_cache$1, tiles);
+	    case 'Point':
+	    case 'MultiPoint':
+	    case 'LineString':
+	    case 'MultiLineString':
+	      return 0;
 
-	    // issue new requests..
-	    tiles.forEach(function (tile) {
-	      if (_cache$1.loadedTile[tile.id] || _cache$1.inflightTile[tile.id]) { return; }
+	    case 'GeometryCollection':
+	      for (i = 0; i < _.geometries.length; i++) {
+	        area += geometry(_.geometries[i]);
+	      }
 
-	      var ref = tile.extent.rectangle();
-	      var east = ref[0];
-	      var north = ref[1];
-	      var west = ref[2];
-	      var south = ref[3];
-	      var params = Object.assign({}, options, { east: east, south: south, west: west, north: north });
+	      return area;
+	  }
+	}
 
-	      // 3 separate requests to store for each tile
-	      var requests = {};
+	function polygonArea(coords) {
+	  var area = 0;
 
-	      Object.keys(_impOsmUrls).forEach(function (k) {
-	        // We exclude WATER from missing geometry as it doesn't seem useful
-	        // We use most confident one-way and turn restrictions only, still have false positives
-	        var kParams = Object.assign({},
-	          params,
-	          (k === 'mr') ? { type: 'PARKING,ROAD,BOTH,PATH' } : { confidenceLevel: 'C1' }
-	        );
-	        var url = (_impOsmUrls[k]) + "/search?" + utilQsString(kParams);
-	        var controller = new AbortController();
+	  if (coords && coords.length > 0) {
+	    area += Math.abs(ringArea(coords[0]));
 
-	        requests[k] = controller;
+	    for (var i = 1; i < coords.length; i++) {
+	      area -= Math.abs(ringArea(coords[i]));
+	    }
+	  }
 
-	        d3_json(url, { signal: controller.signal })
-	          .then(function (data) {
-	            delete _cache$1.inflightTile[tile.id][k];
-	            if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
-	              delete _cache$1.inflightTile[tile.id];
-	              _cache$1.loadedTile[tile.id] = true;
-	            }
+	  return area;
+	}
+	/**
+	 * Calculate the approximate area of the polygon were it projected onto
+	 *     the earth.  Note that this area will be positive if ring is oriented
+	 *     clockwise, otherwise it will be negative.
+	 *
+	 * Reference:
+	 * Robert. G. Chamberlain and William H. Duquette, "Some Algorithms for
+	 *     Polygons on a Sphere", JPL Publication 07-03, Jet Propulsion
+	 *     Laboratory, Pasadena, CA, June 2007 http://trs-new.jpl.nasa.gov/dspace/handle/2014/40409
+	 *
+	 * Returns:
+	 * {float} The approximate signed geodesic area of the polygon in square
+	 *     meters.
+	 */
 
-	            // Road segments at high zoom == oneways
-	            if (data.roadSegments) {
-	              data.roadSegments.forEach(function (feature) {
-	                // Position error at the approximate middle of the segment
-	                var points = feature.points;
-	                var wayId = feature.wayId;
-	                var fromNodeId = feature.fromNodeId;
-	                var toNodeId = feature.toNodeId;
-	                var itemId = "" + wayId + fromNodeId + toNodeId;
-	                var mid = points.length / 2;
-	                var loc;
-
-	                // Even number of points, find midpoint of the middle two
-	                // Odd number of points, use position of very middle point
-	                if (mid % 1 === 0) {
-	                  loc = pointAverage([points[mid - 1], points[mid]]);
-	                } else {
-	                  mid = points[Math.floor(mid)];
-	                  loc = [mid.lon, mid.lat];
-	                }
 
-	                // One-ways can land on same segment in opposite direction
-	                loc = preventCoincident(loc, false);
-
-	                var d = new QAItem(loc, this$1, k, itemId, {
-	                  issueKey: k, // used as a category
-	                  identifier: { // used to post changes
-	                    wayId: wayId,
-	                    fromNodeId: fromNodeId,
-	                    toNodeId: toNodeId
-	                  },
-	                  objectId: wayId,
-	                  objectType: 'way'
-	                });
+	function ringArea(coords) {
+	  var p1,
+	      p2,
+	      p3,
+	      lowerIndex,
+	      middleIndex,
+	      upperIndex,
+	      i,
+	      area = 0,
+	      coordsLength = coords.length;
+
+	  if (coordsLength > 2) {
+	    for (i = 0; i < coordsLength; i++) {
+	      if (i === coordsLength - 2) {
+	        // i = N-2
+	        lowerIndex = coordsLength - 2;
+	        middleIndex = coordsLength - 1;
+	        upperIndex = 0;
+	      } else if (i === coordsLength - 1) {
+	        // i = N-1
+	        lowerIndex = coordsLength - 1;
+	        middleIndex = 0;
+	        upperIndex = 1;
+	      } else {
+	        // i = 0 to N-3
+	        lowerIndex = i;
+	        middleIndex = i + 1;
+	        upperIndex = i + 2;
+	      }
 
-	                // Variables used in the description
-	                d.replacements = {
-	                  percentage: feature.percentOfTrips,
-	                  num_trips: feature.numberOfTrips,
-	                  highway: linkErrorObject(_t('QA.keepRight.error_parts.highway')),
-	                  from_node: linkEntity('n' + feature.fromNodeId),
-	                  to_node: linkEntity('n' + feature.toNodeId)
-	                };
+	      p1 = coords[lowerIndex];
+	      p2 = coords[middleIndex];
+	      p3 = coords[upperIndex];
+	      area += (rad(p3[0]) - rad(p1[0])) * Math.sin(rad(p2[1]));
+	    }
 
-	                _cache$1.data[d.id] = d;
-	                _cache$1.rtree.insert(encodeIssueRtree$1(d));
-	              });
-	            }
+	    area = area * wgs84.RADIUS * wgs84.RADIUS / 2;
+	  }
 
-	            // Tiles at high zoom == missing roads
-	            if (data.tiles) {
-	              data.tiles.forEach(function (feature) {
-	                var type = feature.type;
-	                var x = feature.x;
-	                var y = feature.y;
-	                var numberOfTrips = feature.numberOfTrips;
-	                var geoType = type.toLowerCase();
-	                var itemId = "" + geoType + x + y + numberOfTrips;
-
-	                // Average of recorded points should land on the missing geometry
-	                // Missing geometry could happen to land on another error
-	                var loc = pointAverage(feature.points);
-	                loc = preventCoincident(loc, false);
-
-	                var d = new QAItem(loc, this$1, (k + "-" + geoType), itemId, {
-	                  issueKey: k,
-	                  identifier: { x: x, y: y }
-	                });
+	  return area;
+	}
 
-	                d.replacements = {
-	                  num_trips: numberOfTrips,
-	                  geometry_type: _t(("QA.improveOSM.geometry_types." + geoType))
-	                };
+	function rad(_) {
+	  return _ * Math.PI / 180;
+	}
 
-	                // -1 trips indicates data came from a 3rd party
-	                if (numberOfTrips === -1) {
-	                  d.desc = _t('QA.improveOSM.error_types.mr.description_alt', d.replacements);
-	                }
+	var inputValidation = {};
 
-	                _cache$1.data[d.id] = d;
-	                _cache$1.rtree.insert(encodeIssueRtree$1(d));
-	              });
-	            }
+	var $$g = _export;
+	var $includes = arrayIncludes.includes;
+	var addToUnscopables$1 = addToUnscopables$5;
 
-	            // Entities at high zoom == turn restrictions
-	            if (data.entities) {
-	              data.entities.forEach(function (feature) {
-	                var point = feature.point;
-	                var id = feature.id;
-	                var segments = feature.segments;
-	                var numberOfPasses = feature.numberOfPasses;
-	                var turnType = feature.turnType;
-	                var itemId = "" + (id.replace(/[,:+#]/g, '_'));
-
-	                // Turn restrictions could be missing at same junction
-	                // We also want to bump the error up so node is accessible
-	                var loc = preventCoincident([point.lon, point.lat], true);
-
-	                // Elements are presented in a strange way
-	                var ids = id.split(',');
-	                var from_way = ids[0];
-	                var via_node = ids[3];
-	                var to_way = ids[2].split(':')[1];
-
-	                var d = new QAItem(loc, this$1, k, itemId, {
-	                  issueKey: k,
-	                  identifier: id,
-	                  objectId: via_node,
-	                  objectType: 'node'
-	                });
+	// `Array.prototype.includes` method
+	// https://tc39.es/ecma262/#sec-array.prototype.includes
+	$$g({ target: 'Array', proto: true }, {
+	  includes: function includes(el /* , fromIndex = 0 */) {
+	    return $includes(this, el, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
 
-	                // Travel direction along from_way clarifies the turn restriction
-	                var ref = segments[0].points;
-	                var p1 = ref[0];
-	                var p2 = ref[1];
-	                var dir_of_travel = cardinalDirection(relativeBearing(p1, p2));
-
-	                // Variables used in the description
-	                d.replacements = {
-	                  num_passed: numberOfPasses,
-	                  num_trips: segments[0].numberOfTrips,
-	                  turn_restriction: turnType.toLowerCase(),
-	                  from_way: linkEntity('w' + from_way),
-	                  to_way: linkEntity('w' + to_way),
-	                  travel_direction: dir_of_travel,
-	                  junction: linkErrorObject(_t('QA.keepRight.error_parts.this_node'))
-	                };
+	// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+	addToUnscopables$1('includes');
 
-	                _cache$1.data[d.id] = d;
-	                _cache$1.rtree.insert(encodeIssueRtree$1(d));
-	                dispatch$2.call('loaded');
-	              });
-	            }
-	          })
-	          .catch(function () {
-	            delete _cache$1.inflightTile[tile.id][k];
-	            if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
-	              delete _cache$1.inflightTile[tile.id];
-	              _cache$1.loadedTile[tile.id] = true;
-	            }
-	          });
-	      });
+	var validateCenter$1 = {};
 
-	      _cache$1.inflightTile[tile.id] = requests;
-	    });
-	  },
+	validateCenter$1.validateCenter = function validateCenter(center) {
+	  var validCenterLengths = [2, 3];
 
-	  getComments: function getComments(item) {
-	    var this$1 = this;
+	  if (!Array.isArray(center) || !validCenterLengths.includes(center.length)) {
+	    throw new Error("ERROR! Center has to be an array of length two or three");
+	  }
 
-	    // If comments already retrieved no need to do so again
-	    if (item.comments) {
-	      return Promise.resolve(item);
-	    }
+	  var _center = _slicedToArray(center, 2),
+	      lng = _center[0],
+	      lat = _center[1];
 
-	    var key = item.issueKey;
-	    var qParams = {};
+	  if (typeof lng !== "number" || typeof lat !== "number") {
+	    throw new Error("ERROR! Longitude and Latitude has to be numbers but where ".concat(_typeof(lng), " and ").concat(_typeof(lat)));
+	  }
 
-	    if (key === 'ow') {
-	      qParams = item.identifier;
-	    } else if (key === 'mr') {
-	      qParams.tileX = item.identifier.x;
-	      qParams.tileY = item.identifier.y;
-	    } else if (key === 'tr') {
-	      qParams.targetId = item.identifier;
-	    }
+	  if (lng > 180 || lng < -180) {
+	    throw new Error("ERROR! Longitude has to be between -180 and 180 but was ".concat(lng));
+	  }
 
-	    var url = (_impOsmUrls[key]) + "/retrieveComments?" + utilQsString(qParams);
-	    var cacheComments = function (data) {
-	      // Assign directly for immediate use afterwards
-	      // comments are served newest to oldest
-	      item.comments = data.comments ? data.comments.reverse() : [];
-	      this$1.replaceItem(item);
-	    };
+	  if (lat > 90 || lat < -90) {
+	    throw new Error("ERROR! Latitude has to be between -90 and 90 but was ".concat(lat));
+	  }
+	};
 
-	    return d3_json(url).then(cacheComments).then(function () { return item; });
-	  },
+	var validateRadius$1 = {};
 
-	  postUpdate: function postUpdate(d, callback) {
-	    if (!serviceOsm.authenticated()) { // Username required in payload
-	      return callback({ message: 'Not Authenticated', status: -3}, d);
-	    }
-	    if (_cache$1.inflightPost[d.id]) {
-	      return callback({ message: 'Error update already inflight', status: -2 }, d);
-	    }
+	validateRadius$1.validateRadius = function validateRadius(radius) {
+	  if (typeof radius !== "number") {
+	    throw new Error("ERROR! Radius has to be a positive number but was: ".concat(_typeof(radius)));
+	  }
 
-	    // Payload can only be sent once username is established
-	    serviceOsm.userDetails(sendPayload.bind(this));
+	  if (radius <= 0) {
+	    throw new Error("ERROR! Radius has to be a positive number but was: ".concat(radius));
+	  }
+	};
 
-	    function sendPayload(err, user) {
-	      var this$1 = this;
+	var validateNumberOfEdges$1 = {};
+
+	validateNumberOfEdges$1.validateNumberOfEdges = function validateNumberOfEdges(numberOfEdges) {
+	  if (typeof numberOfEdges !== "number") {
+	    var ARGUMENT_TYPE = Array.isArray(numberOfEdges) ? "array" : _typeof(numberOfEdges);
+	    throw new Error("ERROR! Number of edges has to be a number but was: ".concat(ARGUMENT_TYPE));
+	  }
 
-	      if (err) { return callback(err, d); }
+	  if (numberOfEdges < 3) {
+	    throw new Error("ERROR! Number of edges has to be at least 3 but was: ".concat(numberOfEdges));
+	  }
+	};
 
-	      var key = d.issueKey;
-	      var url = (_impOsmUrls[key]) + "/comment";
-	      var payload = {
-	        username: user.display_name,
-	        targetIds: [ d.identifier ]
-	      };
+	var validateEarthRadius$1 = {};
 
-	      if (d.newStatus) {
-	        payload.status = d.newStatus;
-	        payload.text = 'status changed';
-	      }
+	validateEarthRadius$1.validateEarthRadius = function validateEarthRadius(earthRadius) {
+	  if (typeof earthRadius !== "number") {
+	    var ARGUMENT_TYPE = Array.isArray(earthRadius) ? "array" : _typeof(earthRadius);
+	    throw new Error("ERROR! Earth radius has to be a number but was: ".concat(ARGUMENT_TYPE));
+	  }
 
-	      // Comment take place of default text
-	      if (d.newComment) {
-	        payload.text = d.newComment;
-	      }
+	  if (earthRadius <= 0) {
+	    throw new Error("ERROR! Earth radius has to be a positive number but was: ".concat(earthRadius));
+	  }
+	};
 
-	      var controller = new AbortController();
-	      _cache$1.inflightPost[d.id] = controller;
+	var validateBearing$1 = {};
 
-	      var options = {
-	        method: 'POST',
-	        signal: controller.signal,
-	        body: JSON.stringify(payload)
-	      };
+	validateBearing$1.validateBearing = function validateBearing(bearing) {
+	  if (typeof bearing !== "number") {
+	    var ARGUMENT_TYPE = Array.isArray(bearing) ? "array" : _typeof(bearing);
+	    throw new Error("ERROR! Bearing has to be a number but was: ".concat(ARGUMENT_TYPE));
+	  }
+	};
 
-	      d3_json(url, options)
-	        .then(function () {
-	          delete _cache$1.inflightPost[d.id];
+	var validateCenter = validateCenter$1.validateCenter;
+	var validateRadius = validateRadius$1.validateRadius;
+	var validateNumberOfEdges = validateNumberOfEdges$1.validateNumberOfEdges;
+	var validateEarthRadius = validateEarthRadius$1.validateEarthRadius;
+	var validateBearing = validateBearing$1.validateBearing;
 
-	          // Just a comment, update error in cache
-	          if (!d.newStatus) {
-	            var now = new Date();
-	            var comments = d.comments ? d.comments : [];
+	function validateInput$1(_ref) {
+	  var center = _ref.center,
+	      radius = _ref.radius,
+	      numberOfEdges = _ref.numberOfEdges,
+	      earthRadius = _ref.earthRadius,
+	      bearing = _ref.bearing;
+	  validateCenter(center);
+	  validateRadius(radius);
+	  validateNumberOfEdges(numberOfEdges);
+	  validateEarthRadius(earthRadius);
+	  validateBearing(bearing);
+	}
 
-	            comments.push({
-	              username: payload.username,
-	              text: payload.text,
-	              timestamp: now.getTime() / 1000
-	            });
+	inputValidation.validateCenter = validateCenter;
+	inputValidation.validateRadius = validateRadius;
+	inputValidation.validateNumberOfEdges = validateNumberOfEdges;
+	inputValidation.validateEarthRadius = validateEarthRadius;
+	inputValidation.validateBearing = validateBearing;
+	inputValidation.validateInput = validateInput$1;
 
-	            this$1.replaceItem(d.update({
-	              comments: comments,
-	              newComment: undefined
-	            }));
-	          } else {
-	            this$1.removeItem(d);
-	            if (d.newStatus === 'SOLVED') {
-	              // Keep track of the number of issues closed per type to tag the changeset
-	              if (!(d.issueKey in _cache$1.closed)) {
-	                _cache$1.closed[d.issueKey] = 0;
-	              }
-	              _cache$1.closed[d.issueKey] += 1;
-	            }
-	          }
-	          if (callback) { callback(null, d); }
-	        })
-	        .catch(function (err) {
-	          delete _cache$1.inflightPost[d.id];
-	          if (callback) { callback(err.message); }
-	        });
-	    }
-	  },
+	var validateInput = inputValidation.validateInput;
+	var defaultEarthRadius = 6378137; // equatorial Earth radius
 
+	function toRadians(angleInDegrees) {
+	  return angleInDegrees * Math.PI / 180;
+	}
 
-	  // Get all cached QAItems covering the viewport
-	  getItems: function getItems(projection) {
-	    var viewport = projection.clipExtent();
-	    var min = [viewport[0][0], viewport[1][1]];
-	    var max = [viewport[1][0], viewport[0][1]];
-	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	function toDegrees(angleInRadians) {
+	  return angleInRadians * 180 / Math.PI;
+	}
 
-	    return _cache$1.rtree.search(bbox).map(function (d) { return d.data; });
-	  },
+	function offset(c1, distance, earthRadius, bearing) {
+	  var lat1 = toRadians(c1[1]);
+	  var lon1 = toRadians(c1[0]);
+	  var dByR = distance / earthRadius;
+	  var lat = Math.asin(Math.sin(lat1) * Math.cos(dByR) + Math.cos(lat1) * Math.sin(dByR) * Math.cos(bearing));
+	  var lon = lon1 + Math.atan2(Math.sin(bearing) * Math.sin(dByR) * Math.cos(lat1), Math.cos(dByR) - Math.sin(lat1) * Math.sin(lat));
+	  return [toDegrees(lon), toDegrees(lat)];
+	}
+
+	var circleToPolygon = function circleToPolygon(center, radius, options) {
+	  var n = getNumberOfEdges(options);
+	  var earthRadius = getEarthRadius(options);
+	  var bearing = getBearing(options);
+	  var direction = getDirection(options); // validateInput() throws error on invalid input and do nothing on valid input
+
+	  validateInput({
+	    center: center,
+	    radius: radius,
+	    numberOfEdges: n,
+	    earthRadius: earthRadius,
+	    bearing: bearing
+	  });
+	  var start = toRadians(bearing);
+	  var coordinates = [];
+
+	  for (var i = 0; i < n; ++i) {
+	    coordinates.push(offset(center, radius, earthRadius, start + direction * 2 * Math.PI * -i / n));
+	  }
+
+	  coordinates.push(coordinates[0]);
+	  return {
+	    type: "Polygon",
+	    coordinates: [coordinates]
+	  };
+	};
 
-	  // Get a QAItem from cache
-	  // NOTE: Don't change method name until UI v3 is merged
-	  getError: function getError(id) {
-	    return _cache$1.data[id];
-	  },
+	function getNumberOfEdges(options) {
+	  if (isUndefinedOrNull(options)) {
+	    return 32;
+	  } else if (isObjectNotArray(options)) {
+	    var numberOfEdges = options.numberOfEdges;
+	    return numberOfEdges === undefined ? 32 : numberOfEdges;
+	  }
 
-	  // get the name of the icon to display for this item
-	  getIcon: function getIcon(itemType) {
-	    return _impOsmData.icons[itemType];
-	  },
+	  return options;
+	}
 
-	  // Replace a single QAItem in the cache
-	  replaceItem: function replaceItem(issue) {
-	    if (!(issue instanceof QAItem) || !issue.id) { return; }
+	function getEarthRadius(options) {
+	  if (isUndefinedOrNull(options)) {
+	    return defaultEarthRadius;
+	  } else if (isObjectNotArray(options)) {
+	    var earthRadius = options.earthRadius;
+	    return earthRadius === undefined ? defaultEarthRadius : earthRadius;
+	  }
 
-	    _cache$1.data[issue.id] = issue;
-	    updateRtree$1(encodeIssueRtree$1(issue), true); // true = replace
-	    return issue;
-	  },
+	  return defaultEarthRadius;
+	}
 
-	  // Remove a single QAItem from the cache
-	  removeItem: function removeItem(issue) {
-	    if (!(issue instanceof QAItem) || !issue.id) { return; }
+	function getDirection(options) {
+	  if (isObjectNotArray(options) && options.rightHandRule) {
+	    return -1;
+	  }
 
-	    delete _cache$1.data[issue.id];
-	    updateRtree$1(encodeIssueRtree$1(issue), false); // false = remove
-	  },
+	  return 1;
+	}
 
-	  // Used to populate `closed:improveosm:*` changeset tags
-	  getClosedCounts: function getClosedCounts() {
-	    return _cache$1.closed;
+	function getBearing(options) {
+	  if (isUndefinedOrNull(options)) {
+	    return 0;
+	  } else if (isObjectNotArray(options)) {
+	    var bearing = options.bearing;
+	    return bearing === undefined ? 0 : bearing;
 	  }
-	};
 
-	var defaults = createCommonjsModule(function (module) {
-	function getDefaults() {
-	  return {
-	    baseUrl: null,
-	    breaks: false,
-	    gfm: true,
-	    headerIds: true,
-	    headerPrefix: '',
-	    highlight: null,
-	    langPrefix: 'language-',
-	    mangle: true,
-	    pedantic: false,
-	    renderer: null,
-	    sanitize: false,
-	    sanitizer: null,
-	    silent: false,
-	    smartLists: false,
-	    smartypants: false,
-	    tokenizer: null,
-	    xhtml: false
-	  };
+	  return 0;
+	}
+
+	function isObjectNotArray(argument) {
+	  return argument !== null && _typeof(argument) === "object" && !Array.isArray(argument);
 	}
 
-	function changeDefaults(newDefaults) {
-	  module.exports.defaults = newDefaults;
+	function isUndefinedOrNull(argument) {
+	  return argument === null || argument === undefined;
 	}
 
-	module.exports = {
-	  defaults: getDefaults(),
-	  getDefaults: getDefaults,
-	  changeDefaults: changeDefaults
+	var $$f = _export;
+
+	// `Number.EPSILON` constant
+	// https://tc39.es/ecma262/#sec-number.epsilon
+	$$f({ target: 'Number', stat: true }, {
+	  EPSILON: Math.pow(2, -52)
+	});
+
+	var requireObjectCoercible$4 = requireObjectCoercible$e;
+
+	var quot = /"/g;
+
+	// `CreateHTML` abstract operation
+	// https://tc39.es/ecma262/#sec-createhtml
+	var createHtml = function (string, tag, attribute, value) {
+	  var S = String(requireObjectCoercible$4(string));
+	  var p1 = '<' + tag;
+	  if (attribute !== '') p1 += ' ' + attribute + '="' + String(value).replace(quot, '&quot;') + '"';
+	  return p1 + '>' + S + '</' + tag + '>';
+	};
+
+	var fails$6 = fails$N;
+
+	// check the existence of a method, lowercase
+	// of a tag and escaping quotes in arguments
+	var stringHtmlForced = function (METHOD_NAME) {
+	  return fails$6(function () {
+	    var test = ''[METHOD_NAME]('"');
+	    return test !== test.toLowerCase() || test.split('"').length > 3;
+	  });
 	};
+
+	var $$e = _export;
+	var createHTML = createHtml;
+	var forcedStringHTMLMethod = stringHtmlForced;
+
+	// `String.prototype.link` method
+	// https://tc39.es/ecma262/#sec-string.prototype.link
+	$$e({ target: 'String', proto: true, forced: forcedStringHTMLMethod('link') }, {
+	  link: function link(url) {
+	    return createHTML(this, 'a', 'href', url);
+	  }
 	});
 
 	/**
-	 * Helpers
+	 * splaytree v3.1.0
+	 * Fast Splay tree for Node and browser
+	 *
+	 * @author Alexander Milevski <info@w8r.name>
+	 * @license MIT
+	 * @preserve
 	 */
-	var escapeTest = /[&<>"']/;
-	var escapeReplace = /[&<>"']/g;
-	var escapeTestNoEncode = /[<>"']|&(?!#?\w+;)/;
-	var escapeReplaceNoEncode = /[<>"']|&(?!#?\w+;)/g;
-	var escapeReplacements = {
-	  '&': '&amp;',
-	  '<': '&lt;',
-	  '>': '&gt;',
-	  '"': '&quot;',
-	  "'": '&#39;'
-	};
-	var getEscapeReplacement = function (ch) { return escapeReplacements[ch]; };
-	function escape$1(html, encode) {
-	  if (encode) {
-	    if (escapeTest.test(html)) {
-	      return html.replace(escapeReplace, getEscapeReplacement);
-	    }
-	  } else {
-	    if (escapeTestNoEncode.test(html)) {
-	      return html.replace(escapeReplaceNoEncode, getEscapeReplacement);
-	    }
+	var Node =
+	/** @class */
+	function () {
+	  function Node(key, data) {
+	    this.next = null;
+	    this.key = key;
+	    this.data = data;
+	    this.left = null;
+	    this.right = null;
 	  }
 
-	  return html;
-	}
+	  return Node;
+	}();
+	/* follows "An implementation of top-down splaying"
+	 * by D. Sleator <sleator@cs.cmu.edu> March 1992
+	 */
 
-	var unescapeTest = /&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/ig;
 
-	function unescape$1(html) {
-	  // explicitly match decimal, hex, and named HTML entities
-	  return html.replace(unescapeTest, function (_, n) {
-	    n = n.toLowerCase();
-	    if (n === 'colon') { return ':'; }
-	    if (n.charAt(0) === '#') {
-	      return n.charAt(1) === 'x'
-	        ? String.fromCharCode(parseInt(n.substring(2), 16))
-	        : String.fromCharCode(+n.substring(1));
-	    }
-	    return '';
-	  });
+	function DEFAULT_COMPARE(a, b) {
+	  return a > b ? 1 : a < b ? -1 : 0;
 	}
+	/**
+	 * Simple top down splay, not requiring i to be in the tree t.
+	 */
 
-	var caret = /(^|[^\[])\^/g;
-	function edit(regex, opt) {
-	  regex = regex.source || regex;
-	  opt = opt || '';
-	  var obj = {
-	    replace: function (name, val) {
-	      val = val.source || val;
-	      val = val.replace(caret, '$1');
-	      regex = regex.replace(name, val);
-	      return obj;
-	    },
-	    getRegex: function () {
-	      return new RegExp(regex, opt);
-	    }
-	  };
-	  return obj;
-	}
 
-	var nonWordAndColonTest = /[^\w:]/g;
-	var originIndependentUrl = /^$|^[a-z][a-z0-9+.-]*:|^[?#]/i;
-	function cleanUrl(sanitize, base, href) {
-	  if (sanitize) {
-	    var prot;
-	    try {
-	      prot = decodeURIComponent(unescape$1(href))
-	        .replace(nonWordAndColonTest, '')
-	        .toLowerCase();
-	    } catch (e) {
-	      return null;
-	    }
-	    if (prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0 || prot.indexOf('data:') === 0) {
-	      return null;
-	    }
-	  }
-	  if (base && !originIndependentUrl.test(href)) {
-	    href = resolveUrl(base, href);
-	  }
-	  try {
-	    href = encodeURI(href).replace(/%25/g, '%');
-	  } catch (e$1) {
-	    return null;
-	  }
-	  return href;
-	}
+	function splay(i, t, comparator) {
+	  var N = new Node(null, null);
+	  var l = N;
+	  var r = N;
 
-	var baseUrls = {};
-	var justDomain = /^[^:]+:\/*[^/]*$/;
-	var protocol = /^([^:]+:)[\s\S]*$/;
-	var domain = /^([^:]+:\/*[^/]*)[\s\S]*$/;
+	  while (true) {
+	    var cmp = comparator(i, t.key); //if (i < t.key) {
 
-	function resolveUrl(base, href) {
-	  if (!baseUrls[' ' + base]) {
-	    // we can ignore everything in base after the last slash of its path component,
-	    // but we might need to add _that_
-	    // https://tools.ietf.org/html/rfc3986#section-3
-	    if (justDomain.test(base)) {
-	      baseUrls[' ' + base] = base + '/';
-	    } else {
-	      baseUrls[' ' + base] = rtrim(base, '/', true);
-	    }
-	  }
-	  base = baseUrls[' ' + base];
-	  var relativeBase = base.indexOf(':') === -1;
+	    if (cmp < 0) {
+	      if (t.left === null) break; //if (i < t.left.key) {
 
-	  if (href.substring(0, 2) === '//') {
-	    if (relativeBase) {
-	      return href;
-	    }
-	    return base.replace(protocol, '$1') + href;
-	  } else if (href.charAt(0) === '/') {
-	    if (relativeBase) {
-	      return href;
-	    }
-	    return base.replace(domain, '$1') + href;
-	  } else {
-	    return base + href;
-	  }
-	}
+	      if (comparator(i, t.left.key) < 0) {
+	        var y = t.left;
+	        /* rotate right */
 
-	var noopTest = { exec: function noopTest() {} };
+	        t.left = y.right;
+	        y.right = t;
+	        t = y;
+	        if (t.left === null) break;
+	      }
 
-	function merge$1(obj) {
-	  var arguments$1 = arguments;
+	      r.left = t;
+	      /* link right */
 
-	  var i = 1,
-	    target,
-	    key;
+	      r = t;
+	      t = t.left; //} else if (i > t.key) {
+	    } else if (cmp > 0) {
+	      if (t.right === null) break; //if (i > t.right.key) {
 
-	  for (; i < arguments.length; i++) {
-	    target = arguments$1[i];
-	    for (key in target) {
-	      if (Object.prototype.hasOwnProperty.call(target, key)) {
-	        obj[key] = target[key];
+	      if (comparator(i, t.right.key) > 0) {
+	        var y = t.right;
+	        /* rotate left */
+
+	        t.right = y.left;
+	        y.left = t;
+	        t = y;
+	        if (t.right === null) break;
 	      }
-	    }
+
+	      l.right = t;
+	      /* link left */
+
+	      l = t;
+	      t = t.right;
+	    } else break;
 	  }
+	  /* assemble */
 
-	  return obj;
+
+	  l.right = t.left;
+	  r.left = t.right;
+	  t.left = N.right;
+	  t.right = N.left;
+	  return t;
 	}
 
-	function splitCells(tableRow, count) {
-	  // ensure that every cell-delimiting pipe has a space
-	  // before it to distinguish it from an escaped pipe
-	  var row = tableRow.replace(/\|/g, function (match, offset, str) {
-	      var escaped = false,
-	        curr = offset;
-	      while (--curr >= 0 && str[curr] === '\\') { escaped = !escaped; }
-	      if (escaped) {
-	        // odd number of slashes means | is escaped
-	        // so we leave it alone
-	        return '|';
-	      } else {
-	        // add space before unescaped |
-	        return ' |';
-	      }
-	    }),
-	    cells = row.split(/ \|/);
-	  var i = 0;
+	function insert(i, data, t, comparator) {
+	  var node = new Node(i, data);
 
-	  if (cells.length > count) {
-	    cells.splice(count);
-	  } else {
-	    while (cells.length < count) { cells.push(''); }
+	  if (t === null) {
+	    node.left = node.right = null;
+	    return node;
 	  }
 
-	  for (; i < cells.length; i++) {
-	    // leading or trailing whitespace is ignored per the gfm spec
-	    cells[i] = cells[i].trim().replace(/\\\|/g, '|');
+	  t = splay(i, t, comparator);
+	  var cmp = comparator(i, t.key);
+
+	  if (cmp < 0) {
+	    node.left = t.left;
+	    node.right = t;
+	    t.left = null;
+	  } else if (cmp >= 0) {
+	    node.right = t.right;
+	    node.left = t;
+	    t.right = null;
 	  }
-	  return cells;
+
+	  return node;
 	}
 
-	// Remove trailing 'c's. Equivalent to str.replace(/c*$/, '').
-	// /c*$/ is vulnerable to REDOS.
-	// invert: Remove suffix of non-c chars instead. Default falsey.
-	function rtrim(str, c, invert) {
-	  var l = str.length;
-	  if (l === 0) {
-	    return '';
-	  }
+	function split(key, v, comparator) {
+	  var left = null;
+	  var right = null;
 
-	  // Length of suffix matching the invert condition.
-	  var suffLen = 0;
+	  if (v) {
+	    v = splay(key, v, comparator);
+	    var cmp = comparator(v.key, key);
 
-	  // Step left until we fail to match the invert condition.
-	  while (suffLen < l) {
-	    var currChar = str.charAt(l - suffLen - 1);
-	    if (currChar === c && !invert) {
-	      suffLen++;
-	    } else if (currChar !== c && invert) {
-	      suffLen++;
+	    if (cmp === 0) {
+	      left = v.left;
+	      right = v.right;
+	    } else if (cmp < 0) {
+	      right = v.right;
+	      v.right = null;
+	      left = v;
 	    } else {
-	      break;
+	      left = v.left;
+	      v.left = null;
+	      right = v;
 	    }
 	  }
 
-	  return str.substr(0, l - suffLen);
+	  return {
+	    left: left,
+	    right: right
+	  };
 	}
 
-	function findClosingBracket(str, b) {
-	  if (str.indexOf(b[1]) === -1) {
-	    return -1;
-	  }
-	  var l = str.length;
-	  var level = 0,
-	    i = 0;
-	  for (; i < l; i++) {
-	    if (str[i] === '\\') {
-	      i++;
-	    } else if (str[i] === b[0]) {
-	      level++;
-	    } else if (str[i] === b[1]) {
-	      level--;
-	      if (level < 0) {
-	        return i;
-	      }
-	    }
-	  }
-	  return -1;
+	function merge$3(left, right, comparator) {
+	  if (right === null) return left;
+	  if (left === null) return right;
+	  right = splay(left.key, right, comparator);
+	  right.left = left;
+	  return right;
 	}
+	/**
+	 * Prints level of the tree
+	 */
 
-	function checkSanitizeDeprecation(opt) {
-	  if (opt && opt.sanitize && !opt.silent) {
-	    console.warn('marked(): sanitize and sanitizer parameters are deprecated since version 0.7.0, should not be used and will be removed in the future. Read more here: https://marked.js.org/#/USING_ADVANCED.md#options');
+
+	function printRow(root, prefix, isTail, out, printNode) {
+	  if (root) {
+	    out("" + prefix + (isTail ? '└── ' : '├── ') + printNode(root) + "\n");
+	    var indent = prefix + (isTail ? '    ' : '│   ');
+	    if (root.left) printRow(root.left, indent, false, out, printNode);
+	    if (root.right) printRow(root.right, indent, true, out, printNode);
 	  }
 	}
 
-	var helpers = {
-	  escape: escape$1,
-	  unescape: unescape$1,
-	  edit: edit,
-	  cleanUrl: cleanUrl,
-	  resolveUrl: resolveUrl,
-	  noopTest: noopTest,
-	  merge: merge$1,
-	  splitCells: splitCells,
-	  rtrim: rtrim,
-	  findClosingBracket: findClosingBracket,
-	  checkSanitizeDeprecation: checkSanitizeDeprecation
-	};
+	var Tree =
+	/** @class */
+	function () {
+	  function Tree(comparator) {
+	    if (comparator === void 0) {
+	      comparator = DEFAULT_COMPARE;
+	    }
 
-	var defaults$1 = defaults.defaults;
-	var rtrim$1 = helpers.rtrim;
-	var splitCells$1 = helpers.splitCells;
-	var escape$2 = helpers.escape;
-	var findClosingBracket$1 = helpers.findClosingBracket;
+	    this._root = null;
+	    this._size = 0;
+	    this._comparator = comparator;
+	  }
+	  /**
+	   * Inserts a key, allows duplicates
+	   */
 
-	function outputLink(cap, link, raw) {
-	  var href = link.href;
-	  var title = link.title ? escape$2(link.title) : null;
 
-	  if (cap[0].charAt(0) !== '!') {
-	    return {
-	      type: 'link',
-	      raw: raw,
-	      href: href,
-	      title: title,
-	      text: cap[1]
-	    };
-	  } else {
-	    return {
-	      type: 'image',
-	      raw: raw,
-	      text: escape$2(cap[1]),
-	      href: href,
-	      title: title
-	    };
-	  }
-	}
+	  Tree.prototype.insert = function (key, data) {
+	    this._size++;
+	    return this._root = insert(key, data, this._root, this._comparator);
+	  };
+	  /**
+	   * Adds a key, if it is not present in the tree
+	   */
 
-	/**
-	 * Tokenizer
-	 */
-	var Tokenizer_1 = /*@__PURE__*/(function () {
-	  function Tokenizer(options) {
-	    this.options = options || defaults$1;
-	  }
 
-	  Tokenizer.prototype.space = function space (src) {
-	    var cap = this.rules.block.newline.exec(src);
-	    if (cap) {
-	      if (cap[0].length > 1) {
-	        return {
-	          type: 'space',
-	          raw: cap[0]
-	        };
+	  Tree.prototype.add = function (key, data) {
+	    var node = new Node(key, data);
+
+	    if (this._root === null) {
+	      node.left = node.right = null;
+	      this._size++;
+	      this._root = node;
+	    }
+
+	    var comparator = this._comparator;
+	    var t = splay(key, this._root, comparator);
+	    var cmp = comparator(key, t.key);
+	    if (cmp === 0) this._root = t;else {
+	      if (cmp < 0) {
+	        node.left = t.left;
+	        node.right = t;
+	        t.left = null;
+	      } else if (cmp > 0) {
+	        node.right = t.right;
+	        node.left = t;
+	        t.right = null;
 	      }
-	      return { raw: '\n' };
+
+	      this._size++;
+	      this._root = node;
 	    }
+	    return this._root;
 	  };
+	  /**
+	   * @param  {Key} key
+	   * @return {Node|null}
+	   */
+
+
+	  Tree.prototype.remove = function (key) {
+	    this._root = this._remove(key, this._root, this._comparator);
+	  };
+	  /**
+	   * Deletes i from the tree if it's there
+	   */
+
 
-	  Tokenizer.prototype.code = function code (src, tokens) {
-	    var cap = this.rules.block.code.exec(src);
-	    if (cap) {
-	      var lastToken = tokens[tokens.length - 1];
-	      // An indented code block cannot interrupt a paragraph.
-	      if (lastToken && lastToken.type === 'paragraph') {
-	        tokens.pop();
-	        lastToken.text += '\n' + cap[0].trimRight();
-	        lastToken.raw += '\n' + cap[0];
-	        return lastToken;
+	  Tree.prototype._remove = function (i, t, comparator) {
+	    var x;
+	    if (t === null) return null;
+	    t = splay(i, t, comparator);
+	    var cmp = comparator(i, t.key);
+
+	    if (cmp === 0) {
+	      /* found it */
+	      if (t.left === null) {
+	        x = t.right;
 	      } else {
-	        var text = cap[0].replace(/^ {4}/gm, '');
-	        return {
-	          type: 'code',
-	          raw: cap[0],
-	          codeBlockStyle: 'indented',
-	          text: !this.options.pedantic
-	            ? rtrim$1(text, '\n')
-	            : text
-	        };
+	        x = splay(i, t.left, comparator);
+	        x.right = t.right;
 	      }
-	    }
-	  };
 
-	  Tokenizer.prototype.fences = function fences (src) {
-	    var cap = this.rules.block.fences.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'code',
-	        raw: cap[0],
-	        lang: cap[2] ? cap[2].trim() : cap[2],
-	        text: cap[3] || ''
-	      };
+	      this._size--;
+	      return x;
 	    }
+
+	    return t;
+	    /* It wasn't there */
 	  };
+	  /**
+	   * Removes and returns the node with smallest key
+	   */
+
+
+	  Tree.prototype.pop = function () {
+	    var node = this._root;
 
-	  Tokenizer.prototype.heading = function heading (src) {
-	    var cap = this.rules.block.heading.exec(src);
-	    if (cap) {
+	    if (node) {
+	      while (node.left) {
+	        node = node.left;
+	      }
+
+	      this._root = splay(node.key, this._root, this._comparator);
+	      this._root = this._remove(node.key, this._root, this._comparator);
 	      return {
-	        type: 'heading',
-	        raw: cap[0],
-	        depth: cap[1].length,
-	        text: cap[2]
+	        key: node.key,
+	        data: node.data
 	      };
 	    }
-	  };
 
-	  Tokenizer.prototype.nptable = function nptable (src) {
-	    var cap = this.rules.block.nptable.exec(src);
-	    if (cap) {
-	      var item = {
-	        type: 'table',
-	        header: splitCells$1(cap[1].replace(/^ *| *\| *$/g, '')),
-	        align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
-	        cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : [],
-	        raw: cap[0]
-	      };
+	    return null;
+	  };
+	  /**
+	   * Find without splaying
+	   */
 
-	      if (item.header.length === item.align.length) {
-	        var l = item.align.length;
-	        var i;
-	        for (i = 0; i < l; i++) {
-	          if (/^ *-+: *$/.test(item.align[i])) {
-	            item.align[i] = 'right';
-	          } else if (/^ *:-+: *$/.test(item.align[i])) {
-	            item.align[i] = 'center';
-	          } else if (/^ *:-+ *$/.test(item.align[i])) {
-	            item.align[i] = 'left';
-	          } else {
-	            item.align[i] = null;
-	          }
-	        }
 
-	        l = item.cells.length;
-	        for (i = 0; i < l; i++) {
-	          item.cells[i] = splitCells$1(item.cells[i], item.header.length);
-	        }
+	  Tree.prototype.findStatic = function (key) {
+	    var current = this._root;
+	    var compare = this._comparator;
 
-	        return item;
-	      }
+	    while (current) {
+	      var cmp = compare(key, current.key);
+	      if (cmp === 0) return current;else if (cmp < 0) current = current.left;else current = current.right;
 	    }
+
+	    return null;
 	  };
 
-	  Tokenizer.prototype.hr = function hr (src) {
-	    var cap = this.rules.block.hr.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'hr',
-	        raw: cap[0]
-	      };
+	  Tree.prototype.find = function (key) {
+	    if (this._root) {
+	      this._root = splay(key, this._root, this._comparator);
+	      if (this._comparator(key, this._root.key) !== 0) return null;
 	    }
+
+	    return this._root;
 	  };
 
-	  Tokenizer.prototype.blockquote = function blockquote (src) {
-	    var cap = this.rules.block.blockquote.exec(src);
-	    if (cap) {
-	      var text = cap[0].replace(/^ *> ?/gm, '');
+	  Tree.prototype.contains = function (key) {
+	    var current = this._root;
+	    var compare = this._comparator;
 
-	      return {
-	        type: 'blockquote',
-	        raw: cap[0],
-	        text: text
-	      };
+	    while (current) {
+	      var cmp = compare(key, current.key);
+	      if (cmp === 0) return true;else if (cmp < 0) current = current.left;else current = current.right;
 	    }
+
+	    return false;
 	  };
 
-	  Tokenizer.prototype.list = function list (src) {
-	    var cap = this.rules.block.list.exec(src);
-	    if (cap) {
-	      var raw = cap[0];
-	      var bull = cap[2];
-	      var isordered = bull.length > 1;
+	  Tree.prototype.forEach = function (visitor, ctx) {
+	    var current = this._root;
+	    var Q = [];
+	    /* Initialize stack s */
 
-	      var list = {
-	        type: 'list',
-	        raw: raw,
-	        ordered: isordered,
-	        start: isordered ? +bull : '',
-	        loose: false,
-	        items: []
-	      };
+	    var done = false;
 
-	      // Get each top-level item.
-	      var itemMatch = cap[0].match(this.rules.block.item);
-
-	      var next = false,
-	        item,
-	        space,
-	        b,
-	        addBack,
-	        loose,
-	        istask,
-	        ischecked;
-
-	      var l = itemMatch.length;
-	      for (var i = 0; i < l; i++) {
-	        item = itemMatch[i];
-	        raw = item;
-
-	        // Remove the list item's bullet
-	        // so it is seen as the next token.
-	        space = item.length;
-	        item = item.replace(/^ *([*+-]|\d+\.) */, '');
-
-	        // Outdent whatever the
-	        // list item contains. Hacky.
-	        if (~item.indexOf('\n ')) {
-	          space -= item.length;
-	          item = !this.options.pedantic
-	            ? item.replace(new RegExp('^ {1,' + space + '}', 'gm'), '')
-	            : item.replace(/^ {1,4}/gm, '');
-	        }
-
-	        // Determine whether the next list item belongs here.
-	        // Backpedal if it does not belong in this list.
-	        if (i !== l - 1) {
-	          b = this.rules.block.bullet.exec(itemMatch[i + 1])[0];
-	          if (bull.length > 1 ? b.length === 1
-	            : (b.length > 1 || (this.options.smartLists && b !== bull))) {
-	            addBack = itemMatch.slice(i + 1).join('\n');
-	            list.raw = list.raw.substring(0, list.raw.length - addBack.length);
-	            i = l - 1;
-	          }
-	        }
+	    while (!done) {
+	      if (current !== null) {
+	        Q.push(current);
+	        current = current.left;
+	      } else {
+	        if (Q.length !== 0) {
+	          current = Q.pop();
+	          visitor.call(ctx, current);
+	          current = current.right;
+	        } else done = true;
+	      }
+	    }
 
-	        // Determine whether item is loose or not.
-	        // Use: /(^|\n)(?! )[^\n]+\n\n(?!\s*$)/
-	        // for discount behavior.
-	        loose = next || /\n\n(?!\s*$)/.test(item);
-	        if (i !== l - 1) {
-	          next = item.charAt(item.length - 1) === '\n';
-	          if (!loose) { loose = next; }
-	        }
+	    return this;
+	  };
+	  /**
+	   * Walk key range from `low` to `high`. Stops if `fn` returns a value.
+	   */
 
-	        if (loose) {
-	          list.loose = true;
-	        }
 
-	        // Check for task list items
-	        istask = /^\[[ xX]\] /.test(item);
-	        ischecked = undefined;
-	        if (istask) {
-	          ischecked = item[1] !== ' ';
-	          item = item.replace(/^\[[ xX]\] +/, '');
+	  Tree.prototype.range = function (low, high, fn, ctx) {
+	    var Q = [];
+	    var compare = this._comparator;
+	    var node = this._root;
+	    var cmp;
+
+	    while (Q.length !== 0 || node) {
+	      if (node) {
+	        Q.push(node);
+	        node = node.left;
+	      } else {
+	        node = Q.pop();
+	        cmp = compare(node.key, high);
+
+	        if (cmp > 0) {
+	          break;
+	        } else if (compare(node.key, low) >= 0) {
+	          if (fn.call(ctx, node)) return this; // stop if smth is returned
 	        }
 
-	        list.items.push({
-	          raw: raw,
-	          task: istask,
-	          checked: ischecked,
-	          loose: loose,
-	          text: item
-	        });
+	        node = node.right;
 	      }
-
-	      return list;
 	    }
-	  };
 
-	  Tokenizer.prototype.html = function html (src) {
-	    var cap = this.rules.block.html.exec(src);
-	    if (cap) {
-	      return {
-	        type: this.options.sanitize
-	          ? 'paragraph'
-	          : 'html',
-	        raw: cap[0],
-	        pre: !this.options.sanitizer
-	          && (cap[1] === 'pre' || cap[1] === 'script' || cap[1] === 'style'),
-	        text: this.options.sanitize ? (this.options.sanitizer ? this.options.sanitizer(cap[0]) : escape$2(cap[0])) : cap[0]
-	      };
-	    }
+	    return this;
 	  };
+	  /**
+	   * Returns array of keys
+	   */
 
-	  Tokenizer.prototype.def = function def (src) {
-	    var cap = this.rules.block.def.exec(src);
-	    if (cap) {
-	      if (cap[3]) { cap[3] = cap[3].substring(1, cap[3].length - 1); }
-	      var tag = cap[1].toLowerCase().replace(/\s+/g, ' ');
-	      return {
-	        tag: tag,
-	        raw: cap[0],
-	        href: cap[2],
-	        title: cap[3]
-	      };
-	    }
+
+	  Tree.prototype.keys = function () {
+	    var keys = [];
+	    this.forEach(function (_a) {
+	      var key = _a.key;
+	      return keys.push(key);
+	    });
+	    return keys;
 	  };
+	  /**
+	   * Returns array of all the data in the nodes
+	   */
 
-	  Tokenizer.prototype.table = function table (src) {
-	    var cap = this.rules.block.table.exec(src);
-	    if (cap) {
-	      var item = {
-	        type: 'table',
-	        header: splitCells$1(cap[1].replace(/^ *| *\| *$/g, '')),
-	        align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
-	        cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : []
-	      };
 
-	      if (item.header.length === item.align.length) {
-	        item.raw = cap[0];
+	  Tree.prototype.values = function () {
+	    var values = [];
+	    this.forEach(function (_a) {
+	      var data = _a.data;
+	      return values.push(data);
+	    });
+	    return values;
+	  };
 
-	        var l = item.align.length;
-	        var i;
-	        for (i = 0; i < l; i++) {
-	          if (/^ *-+: *$/.test(item.align[i])) {
-	            item.align[i] = 'right';
-	          } else if (/^ *:-+: *$/.test(item.align[i])) {
-	            item.align[i] = 'center';
-	          } else if (/^ *:-+ *$/.test(item.align[i])) {
-	            item.align[i] = 'left';
-	          } else {
-	            item.align[i] = null;
-	          }
-	        }
+	  Tree.prototype.min = function () {
+	    if (this._root) return this.minNode(this._root).key;
+	    return null;
+	  };
 
-	        l = item.cells.length;
-	        for (i = 0; i < l; i++) {
-	          item.cells[i] = splitCells$1(
-	            item.cells[i].replace(/^ *\| *| *\| *$/g, ''),
-	            item.header.length);
-	        }
+	  Tree.prototype.max = function () {
+	    if (this._root) return this.maxNode(this._root).key;
+	    return null;
+	  };
 
-	        return item;
-	      }
+	  Tree.prototype.minNode = function (t) {
+	    if (t === void 0) {
+	      t = this._root;
 	    }
-	  };
 
-	  Tokenizer.prototype.lheading = function lheading (src) {
-	    var cap = this.rules.block.lheading.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'heading',
-	        raw: cap[0],
-	        depth: cap[2].charAt(0) === '=' ? 1 : 2,
-	        text: cap[1]
-	      };
+	    if (t) while (t.left) {
+	      t = t.left;
 	    }
+	    return t;
 	  };
 
-	  Tokenizer.prototype.paragraph = function paragraph (src) {
-	    var cap = this.rules.block.paragraph.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'paragraph',
-	        raw: cap[0],
-	        text: cap[1].charAt(cap[1].length - 1) === '\n'
-	          ? cap[1].slice(0, -1)
-	          : cap[1]
-	      };
+	  Tree.prototype.maxNode = function (t) {
+	    if (t === void 0) {
+	      t = this._root;
 	    }
-	  };
 
-	  Tokenizer.prototype.text = function text (src) {
-	    var cap = this.rules.block.text.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'text',
-	        raw: cap[0],
-	        text: cap[0]
-	      };
+	    if (t) while (t.right) {
+	      t = t.right;
 	    }
+	    return t;
 	  };
+	  /**
+	   * Returns node at given index
+	   */
 
-	  Tokenizer.prototype.escape = function escape$1 (src) {
-	    var cap = this.rules.inline.escape.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'escape',
-	        raw: cap[0],
-	        text: escape$2(cap[1])
-	      };
+
+	  Tree.prototype.at = function (index) {
+	    var current = this._root;
+	    var done = false;
+	    var i = 0;
+	    var Q = [];
+
+	    while (!done) {
+	      if (current) {
+	        Q.push(current);
+	        current = current.left;
+	      } else {
+	        if (Q.length > 0) {
+	          current = Q.pop();
+	          if (i === index) return current;
+	          i++;
+	          current = current.right;
+	        } else done = true;
+	      }
 	    }
+
+	    return null;
 	  };
 
-	  Tokenizer.prototype.tag = function tag (src, inLink, inRawBlock) {
-	    var cap = this.rules.inline.tag.exec(src);
-	    if (cap) {
-	      if (!inLink && /^<a /i.test(cap[0])) {
-	        inLink = true;
-	      } else if (inLink && /^<\/a>/i.test(cap[0])) {
-	        inLink = false;
-	      }
-	      if (!inRawBlock && /^<(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
-	        inRawBlock = true;
-	      } else if (inRawBlock && /^<\/(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
-	        inRawBlock = false;
+	  Tree.prototype.next = function (d) {
+	    var root = this._root;
+	    var successor = null;
+
+	    if (d.right) {
+	      successor = d.right;
+
+	      while (successor.left) {
+	        successor = successor.left;
 	      }
 
-	      return {
-	        type: this.options.sanitize
-	          ? 'text'
-	          : 'html',
-	        raw: cap[0],
-	        inLink: inLink,
-	        inRawBlock: inRawBlock,
-	        text: this.options.sanitize
-	          ? (this.options.sanitizer
-	            ? this.options.sanitizer(cap[0])
-	            : escape$2(cap[0]))
-	          : cap[0]
-	      };
+	      return successor;
+	    }
+
+	    var comparator = this._comparator;
+
+	    while (root) {
+	      var cmp = comparator(d.key, root.key);
+	      if (cmp === 0) break;else if (cmp < 0) {
+	        successor = root;
+	        root = root.left;
+	      } else root = root.right;
 	    }
+
+	    return successor;
 	  };
 
-	  Tokenizer.prototype.link = function link (src) {
-	    var cap = this.rules.inline.link.exec(src);
-	    if (cap) {
-	      var lastParenIndex = findClosingBracket$1(cap[2], '()');
-	      if (lastParenIndex > -1) {
-	        var start = cap[0].indexOf('!') === 0 ? 5 : 4;
-	        var linkLen = start + cap[1].length + lastParenIndex;
-	        cap[2] = cap[2].substring(0, lastParenIndex);
-	        cap[0] = cap[0].substring(0, linkLen).trim();
-	        cap[3] = '';
-	      }
-	      var href = cap[2];
-	      var title = '';
-	      if (this.options.pedantic) {
-	        var link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);
+	  Tree.prototype.prev = function (d) {
+	    var root = this._root;
+	    var predecessor = null;
 
-	        if (link) {
-	          href = link[1];
-	          title = link[3];
-	        } else {
-	          title = '';
-	        }
-	      } else {
-	        title = cap[3] ? cap[3].slice(1, -1) : '';
+	    if (d.left !== null) {
+	      predecessor = d.left;
+
+	      while (predecessor.right) {
+	        predecessor = predecessor.right;
 	      }
-	      href = href.trim().replace(/^<([\s\S]*)>$/, '$1');
-	      var token = outputLink(cap, {
-	        href: href ? href.replace(this.rules.inline._escapes, '$1') : href,
-	        title: title ? title.replace(this.rules.inline._escapes, '$1') : title
-	      }, cap[0]);
-	      return token;
+
+	      return predecessor;
 	    }
-	  };
 
-	  Tokenizer.prototype.reflink = function reflink (src, links) {
-	    var cap;
-	    if ((cap = this.rules.inline.reflink.exec(src))
-	        || (cap = this.rules.inline.nolink.exec(src))) {
-	      var link = (cap[2] || cap[1]).replace(/\s+/g, ' ');
-	      link = links[link.toLowerCase()];
-	      if (!link || !link.href) {
-	        var text = cap[0].charAt(0);
-	        return {
-	          type: 'text',
-	          raw: text,
-	          text: text
-	        };
+	    var comparator = this._comparator;
+
+	    while (root) {
+	      var cmp = comparator(d.key, root.key);
+	      if (cmp === 0) break;else if (cmp < 0) root = root.left;else {
+	        predecessor = root;
+	        root = root.right;
 	      }
-	      var token = outputLink(cap, link, cap[0]);
-	      return token;
 	    }
+
+	    return predecessor;
 	  };
 
-	  Tokenizer.prototype.strong = function strong (src) {
-	    var cap = this.rules.inline.strong.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'strong',
-	        raw: cap[0],
-	        text: cap[4] || cap[3] || cap[2] || cap[1]
-	      };
-	    }
+	  Tree.prototype.clear = function () {
+	    this._root = null;
+	    this._size = 0;
+	    return this;
 	  };
 
-	  Tokenizer.prototype.em = function em (src) {
-	    var cap = this.rules.inline.em.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'em',
-	        raw: cap[0],
-	        text: cap[6] || cap[5] || cap[4] || cap[3] || cap[2] || cap[1]
-	      };
-	    }
+	  Tree.prototype.toList = function () {
+	    return toList(this._root);
 	  };
+	  /**
+	   * Bulk-load items. Both array have to be same size
+	   */
 
-	  Tokenizer.prototype.codespan = function codespan (src) {
-	    var cap = this.rules.inline.code.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'codespan',
-	        raw: cap[0],
-	        text: escape$2(cap[2].trim(), true)
-	      };
+
+	  Tree.prototype.load = function (keys, values, presort) {
+	    if (values === void 0) {
+	      values = [];
 	    }
-	  };
 
-	  Tokenizer.prototype.br = function br (src) {
-	    var cap = this.rules.inline.br.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'br',
-	        raw: cap[0]
-	      };
+	    if (presort === void 0) {
+	      presort = false;
 	    }
-	  };
 
-	  Tokenizer.prototype.del = function del (src) {
-	    var cap = this.rules.inline.del.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'del',
-	        raw: cap[0],
-	        text: cap[1]
-	      };
+	    var size = keys.length;
+	    var comparator = this._comparator; // sort if needed
+
+	    if (presort) sort(keys, values, 0, size - 1, comparator);
+
+	    if (this._root === null) {
+	      // empty tree
+	      this._root = loadRecursive(keys, values, 0, size);
+	      this._size = size;
+	    } else {
+	      // that re-builds the whole tree from two in-order traversals
+	      var mergedList = mergeLists(this.toList(), createList(keys, values), comparator);
+	      size = this._size + size;
+	      this._root = sortedListToBST({
+	        head: mergedList
+	      }, 0, size);
 	    }
+
+	    return this;
 	  };
 
-	  Tokenizer.prototype.autolink = function autolink (src, mangle) {
-	    var cap = this.rules.inline.autolink.exec(src);
-	    if (cap) {
-	      var text, href;
-	      if (cap[2] === '@') {
-	        text = escape$2(this.options.mangle ? mangle(cap[1]) : cap[1]);
-	        href = 'mailto:' + text;
-	      } else {
-	        text = escape$2(cap[1]);
-	        href = text;
-	      }
+	  Tree.prototype.isEmpty = function () {
+	    return this._root === null;
+	  };
 
-	      return {
-	        type: 'link',
-	        raw: cap[0],
-	        text: text,
-	        href: href,
-	        tokens: [
-	          {
-	            type: 'text',
-	            raw: text,
-	            text: text
-	          }
-	        ]
+	  Object.defineProperty(Tree.prototype, "size", {
+	    get: function get() {
+	      return this._size;
+	    },
+	    enumerable: true,
+	    configurable: true
+	  });
+	  Object.defineProperty(Tree.prototype, "root", {
+	    get: function get() {
+	      return this._root;
+	    },
+	    enumerable: true,
+	    configurable: true
+	  });
+
+	  Tree.prototype.toString = function (printNode) {
+	    if (printNode === void 0) {
+	      printNode = function printNode(n) {
+	        return String(n.key);
 	      };
 	    }
+
+	    var out = [];
+	    printRow(this._root, '', true, function (v) {
+	      return out.push(v);
+	    }, printNode);
+	    return out.join('');
 	  };
 
-	  Tokenizer.prototype.url = function url (src, mangle) {
-	    var cap;
-	    if (cap = this.rules.inline.url.exec(src)) {
-	      var text, href;
-	      if (cap[2] === '@') {
-	        text = escape$2(this.options.mangle ? mangle(cap[0]) : cap[0]);
-	        href = 'mailto:' + text;
-	      } else {
-	        // do extended autolink path validation
-	        var prevCapZero;
-	        do {
-	          prevCapZero = cap[0];
-	          cap[0] = this.rules.inline._backpedal.exec(cap[0])[0];
-	        } while (prevCapZero !== cap[0]);
-	        text = escape$2(cap[0]);
-	        if (cap[1] === 'www.') {
-	          href = 'http://' + text;
-	        } else {
-	          href = text;
-	        }
-	      }
-	      return {
-	        type: 'link',
-	        raw: cap[0],
-	        text: text,
-	        href: href,
-	        tokens: [
-	          {
-	            type: 'text',
-	            raw: text,
-	            text: text
-	          }
-	        ]
-	      };
+	  Tree.prototype.update = function (key, newKey, newData) {
+	    var comparator = this._comparator;
+
+	    var _a = split(key, this._root, comparator),
+	        left = _a.left,
+	        right = _a.right;
+
+	    if (comparator(key, newKey) < 0) {
+	      right = insert(newKey, newData, right, comparator);
+	    } else {
+	      left = insert(newKey, newData, left, comparator);
 	    }
+
+	    this._root = merge$3(left, right, comparator);
+	  };
+
+	  Tree.prototype.split = function (key) {
+	    return split(key, this._root, this._comparator);
 	  };
 
-	  Tokenizer.prototype.inlineText = function inlineText (src, inRawBlock, smartypants) {
-	    var cap = this.rules.inline.text.exec(src);
-	    if (cap) {
-	      var text;
-	      if (inRawBlock) {
-	        text = this.options.sanitize ? (this.options.sanitizer ? this.options.sanitizer(cap[0]) : escape$2(cap[0])) : cap[0];
-	      } else {
-	        text = escape$2(this.options.smartypants ? smartypants(cap[0]) : cap[0]);
-	      }
-	      return {
-	        type: 'text',
-	        raw: cap[0],
-	        text: text
-	      };
+	  return Tree;
+	}();
+
+	function loadRecursive(keys, values, start, end) {
+	  var size = end - start;
+
+	  if (size > 0) {
+	    var middle = start + Math.floor(size / 2);
+	    var key = keys[middle];
+	    var data = values[middle];
+	    var node = new Node(key, data);
+	    node.left = loadRecursive(keys, values, start, middle);
+	    node.right = loadRecursive(keys, values, middle + 1, end);
+	    return node;
+	  }
+
+	  return null;
+	}
+
+	function createList(keys, values) {
+	  var head = new Node(null, null);
+	  var p = head;
+
+	  for (var i = 0; i < keys.length; i++) {
+	    p = p.next = new Node(keys[i], values[i]);
+	  }
+
+	  p.next = null;
+	  return head.next;
+	}
+
+	function toList(root) {
+	  var current = root;
+	  var Q = [];
+	  var done = false;
+	  var head = new Node(null, null);
+	  var p = head;
+
+	  while (!done) {
+	    if (current) {
+	      Q.push(current);
+	      current = current.left;
+	    } else {
+	      if (Q.length > 0) {
+	        current = p = p.next = Q.pop();
+	        current = current.right;
+	      } else done = true;
+	    }
+	  }
+
+	  p.next = null; // that'll work even if the tree was empty
+
+	  return head.next;
+	}
+
+	function sortedListToBST(list, start, end) {
+	  var size = end - start;
+
+	  if (size > 0) {
+	    var middle = start + Math.floor(size / 2);
+	    var left = sortedListToBST(list, start, middle);
+	    var root = list.head;
+	    root.left = left;
+	    list.head = list.head.next;
+	    root.right = sortedListToBST(list, middle + 1, end);
+	    return root;
+	  }
+
+	  return null;
+	}
+
+	function mergeLists(l1, l2, compare) {
+	  var head = new Node(null, null); // dummy
+
+	  var p = head;
+	  var p1 = l1;
+	  var p2 = l2;
+
+	  while (p1 !== null && p2 !== null) {
+	    if (compare(p1.key, p2.key) < 0) {
+	      p.next = p1;
+	      p1 = p1.next;
+	    } else {
+	      p.next = p2;
+	      p2 = p2.next;
 	    }
-	  };
 
-	  return Tokenizer;
-	}());
+	    p = p.next;
+	  }
 
-	var noopTest$1 = helpers.noopTest;
-	var edit$1 = helpers.edit;
-	var merge$2 = helpers.merge;
+	  if (p1 !== null) {
+	    p.next = p1;
+	  } else if (p2 !== null) {
+	    p.next = p2;
+	  }
 
-	/**
-	 * Block-Level Grammar
-	 */
-	var block = {
-	  newline: /^\n+/,
-	  code: /^( {4}[^\n]+\n*)+/,
-	  fences: /^ {0,3}(`{3,}(?=[^`\n]*\n)|~{3,})([^\n]*)\n(?:|([\s\S]*?)\n)(?: {0,3}\1[~`]* *(?:\n+|$)|$)/,
-	  hr: /^ {0,3}((?:- *){3,}|(?:_ *){3,}|(?:\* *){3,})(?:\n+|$)/,
-	  heading: /^ {0,3}(#{1,6}) +([^\n]*?)(?: +#+)? *(?:\n+|$)/,
-	  blockquote: /^( {0,3}> ?(paragraph|[^\n]*)(?:\n|$))+/,
-	  list: /^( {0,3})(bull) [\s\S]+?(?:hr|def|\n{2,}(?! )(?!\1bull )\n*|\s*$)/,
-	  html: '^ {0,3}(?:' // optional indentation
-	    + '<(script|pre|style)[\\s>][\\s\\S]*?(?:</\\1>[^\\n]*\\n+|$)' // (1)
-	    + '|comment[^\\n]*(\\n+|$)' // (2)
-	    + '|<\\?[\\s\\S]*?\\?>\\n*' // (3)
-	    + '|<![A-Z][\\s\\S]*?>\\n*' // (4)
-	    + '|<!\\[CDATA\\[[\\s\\S]*?\\]\\]>\\n*' // (5)
-	    + '|</?(tag)(?: +|\\n|/?>)[\\s\\S]*?(?:\\n{2,}|$)' // (6)
-	    + '|<(?!script|pre|style)([a-z][\\w-]*)(?:attribute)*? */?>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:\\n{2,}|$)' // (7) open tag
-	    + '|</(?!script|pre|style)[a-z][\\w-]*\\s*>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:\\n{2,}|$)' // (7) closing tag
-	    + ')',
-	  def: /^ {0,3}\[(label)\]: *\n? *<?([^\s>]+)>?(?:(?: +\n? *| *\n *)(title))? *(?:\n+|$)/,
-	  nptable: noopTest$1,
-	  table: noopTest$1,
-	  lheading: /^([^\n]+)\n {0,3}(=+|-+) *(?:\n+|$)/,
-	  // regex template, placeholders will be replaced according to different paragraph
-	  // interruption rules of commonmark and the original markdown spec:
-	  _paragraph: /^([^\n]+(?:\n(?!hr|heading|lheading|blockquote|fences|list|html)[^\n]+)*)/,
-	  text: /^[^\n]+/
-	};
+	  return head.next;
+	}
 
-	block._label = /(?!\s*\])(?:\\[\[\]]|[^\[\]])+/;
-	block._title = /(?:"(?:\\"?|[^"\\])*"|'[^'\n]*(?:\n[^'\n]+)*\n?'|\([^()]*\))/;
-	block.def = edit$1(block.def)
-	  .replace('label', block._label)
-	  .replace('title', block._title)
-	  .getRegex();
-
-	block.bullet = /(?:[*+-]|\d{1,9}\.)/;
-	block.item = /^( *)(bull) ?[^\n]*(?:\n(?!\1bull ?)[^\n]*)*/;
-	block.item = edit$1(block.item, 'gm')
-	  .replace(/bull/g, block.bullet)
-	  .getRegex();
-
-	block.list = edit$1(block.list)
-	  .replace(/bull/g, block.bullet)
-	  .replace('hr', '\\n+(?=\\1?(?:(?:- *){3,}|(?:_ *){3,}|(?:\\* *){3,})(?:\\n+|$))')
-	  .replace('def', '\\n+(?=' + block.def.source + ')')
-	  .getRegex();
-
-	block._tag = 'address|article|aside|base|basefont|blockquote|body|caption'
-	  + '|center|col|colgroup|dd|details|dialog|dir|div|dl|dt|fieldset|figcaption'
-	  + '|figure|footer|form|frame|frameset|h[1-6]|head|header|hr|html|iframe'
-	  + '|legend|li|link|main|menu|menuitem|meta|nav|noframes|ol|optgroup|option'
-	  + '|p|param|section|source|summary|table|tbody|td|tfoot|th|thead|title|tr'
-	  + '|track|ul';
-	block._comment = /<!--(?!-?>)[\s\S]*?-->/;
-	block.html = edit$1(block.html, 'i')
-	  .replace('comment', block._comment)
-	  .replace('tag', block._tag)
-	  .replace('attribute', / +[a-zA-Z:_][\w.:-]*(?: *= *"[^"\n]*"| *= *'[^'\n]*'| *= *[^\s"'=<>`]+)?/)
-	  .getRegex();
-
-	block.paragraph = edit$1(block._paragraph)
-	  .replace('hr', block.hr)
-	  .replace('heading', ' {0,3}#{1,6} ')
-	  .replace('|lheading', '') // setex headings don't interrupt commonmark paragraphs
-	  .replace('blockquote', ' {0,3}>')
-	  .replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n')
-	  .replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
-	  .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)')
-	  .replace('tag', block._tag) // pars can be interrupted by type (6) html blocks
-	  .getRegex();
-
-	block.blockquote = edit$1(block.blockquote)
-	  .replace('paragraph', block.paragraph)
-	  .getRegex();
+	function sort(keys, values, left, right, compare) {
+	  if (left >= right) return;
+	  var pivot = keys[left + right >> 1];
+	  var i = left - 1;
+	  var j = right + 1;
 
-	/**
-	 * Normal Block Grammar
-	 */
+	  while (true) {
+	    do {
+	      i++;
+	    } while (compare(keys[i], pivot) < 0);
 
-	block.normal = merge$2({}, block);
+	    do {
+	      j--;
+	    } while (compare(keys[j], pivot) > 0);
 
-	/**
-	 * GFM Block Grammar
-	 */
+	    if (i >= j) break;
+	    var tmp = keys[i];
+	    keys[i] = keys[j];
+	    keys[j] = tmp;
+	    tmp = values[i];
+	    values[i] = values[j];
+	    values[j] = tmp;
+	  }
 
-	block.gfm = merge$2({}, block.normal, {
-	  nptable: '^ *([^|\\n ].*\\|.*)\\n' // Header
-	    + ' *([-:]+ *\\|[-| :]*)' // Align
-	    + '(?:\\n((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)', // Cells
-	  table: '^ *\\|(.+)\\n' // Header
-	    + ' *\\|?( *[-:]+[-| :]*)' // Align
-	    + '(?:\\n *((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)' // Cells
-	});
+	  sort(keys, values, left, j, compare);
+	  sort(keys, values, j + 1, right, compare);
+	}
+
+	function _classCallCheck(instance, Constructor) {
+	  if (!(instance instanceof Constructor)) {
+	    throw new TypeError("Cannot call a class as a function");
+	  }
+	}
 
-	block.gfm.nptable = edit$1(block.gfm.nptable)
-	  .replace('hr', block.hr)
-	  .replace('heading', ' {0,3}#{1,6} ')
-	  .replace('blockquote', ' {0,3}>')
-	  .replace('code', ' {4}[^\\n]')
-	  .replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n')
-	  .replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
-	  .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)')
-	  .replace('tag', block._tag) // tables can be interrupted by type (6) html blocks
-	  .getRegex();
-
-	block.gfm.table = edit$1(block.gfm.table)
-	  .replace('hr', block.hr)
-	  .replace('heading', ' {0,3}#{1,6} ')
-	  .replace('blockquote', ' {0,3}>')
-	  .replace('code', ' {4}[^\\n]')
-	  .replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n')
-	  .replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
-	  .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)')
-	  .replace('tag', block._tag) // tables can be interrupted by type (6) html blocks
-	  .getRegex();
+	function _defineProperties(target, props) {
+	  for (var i = 0; i < props.length; i++) {
+	    var descriptor = props[i];
+	    descriptor.enumerable = descriptor.enumerable || false;
+	    descriptor.configurable = true;
+	    if ("value" in descriptor) descriptor.writable = true;
+	    Object.defineProperty(target, descriptor.key, descriptor);
+	  }
+	}
 
+	function _createClass(Constructor, protoProps, staticProps) {
+	  if (protoProps) _defineProperties(Constructor.prototype, protoProps);
+	  if (staticProps) _defineProperties(Constructor, staticProps);
+	  return Constructor;
+	}
 	/**
-	 * Pedantic grammar (original John Gruber's loose markdown specification)
+	 * A bounding box has the format:
+	 *
+	 *  { ll: { x: xmin, y: ymin }, ur: { x: xmax, y: ymax } }
+	 *
 	 */
 
-	block.pedantic = merge$2({}, block.normal, {
-	  html: edit$1(
-	    '^ *(?:comment *(?:\\n|\\s*$)'
-	    + '|<(tag)[\\s\\S]+?</\\1> *(?:\\n{2,}|\\s*$)' // closed tag
-	    + '|<tag(?:"[^"]*"|\'[^\']*\'|\\s[^\'"/>\\s]*)*?/?> *(?:\\n{2,}|\\s*$))')
-	    .replace('comment', block._comment)
-	    .replace(/tag/g, '(?!(?:'
-	      + 'a|em|strong|small|s|cite|q|dfn|abbr|data|time|code|var|samp|kbd|sub'
-	      + '|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo|span|br|wbr|ins|del|img)'
-	      + '\\b)\\w+(?!:|[^\\w\\s@]*@)\\b')
-	    .getRegex(),
-	  def: /^ *\[([^\]]+)\]: *<?([^\s>]+)>?(?: +(["(][^\n]+[")]))? *(?:\n+|$)/,
-	  heading: /^ *(#{1,6}) *([^\n]+?) *(?:#+ *)?(?:\n+|$)/,
-	  fences: noopTest$1, // fences not supported
-	  paragraph: edit$1(block.normal._paragraph)
-	    .replace('hr', block.hr)
-	    .replace('heading', ' *#{1,6} *[^\n]')
-	    .replace('lheading', block.lheading)
-	    .replace('blockquote', ' {0,3}>')
-	    .replace('|fences', '')
-	    .replace('|list', '')
-	    .replace('|html', '')
-	    .getRegex()
-	});
 
-	/**
-	 * Inline-Level Grammar
-	 */
-	var inline = {
-	  escape: /^\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/,
-	  autolink: /^<(scheme:[^\s\x00-\x1f<>]*|email)>/,
-	  url: noopTest$1,
-	  tag: '^comment'
-	    + '|^</[a-zA-Z][\\w:-]*\\s*>' // self-closing tag
-	    + '|^<[a-zA-Z][\\w-]*(?:attribute)*?\\s*/?>' // open tag
-	    + '|^<\\?[\\s\\S]*?\\?>' // processing instruction, e.g. <?php ?>
-	    + '|^<![a-zA-Z]+\\s[\\s\\S]*?>' // declaration, e.g. <!DOCTYPE html>
-	    + '|^<!\\[CDATA\\[[\\s\\S]*?\\]\\]>', // CDATA section
-	  link: /^!?\[(label)\]\(\s*(href)(?:\s+(title))?\s*\)/,
-	  reflink: /^!?\[(label)\]\[(?!\s*\])((?:\\[\[\]]?|[^\[\]\\])+)\]/,
-	  nolink: /^!?\[(?!\s*\])((?:\[[^\[\]]*\]|\\[\[\]]|[^\[\]])*)\](?:\[\])?/,
-	  strong: /^__([^\s_])__(?!_)|^\*\*([^\s*])\*\*(?!\*)|^__([^\s][\s\S]*?[^\s])__(?!_)|^\*\*([^\s][\s\S]*?[^\s])\*\*(?!\*)/,
-	  em: /^_([^\s_])_(?!_)|^_([^\s_<][\s\S]*?[^\s_])_(?!_|[^\spunctuation])|^_([^\s_<][\s\S]*?[^\s])_(?!_|[^\spunctuation])|^\*([^\s*<\[])\*(?!\*)|^\*([^\s<"][\s\S]*?[^\s\[\*])\*(?![\]`punctuation])|^\*([^\s*"<\[][\s\S]*[^\s])\*(?!\*)/,
-	  code: /^(`+)([^`]|[^`][\s\S]*?[^`])\1(?!`)/,
-	  br: /^( {2,}|\\)\n(?!\s*$)/,
-	  del: noopTest$1,
-	  text: /^(`+|[^`])(?:[\s\S]*?(?:(?=[\\<!\[`*]|\b_|$)|[^ ](?= {2,}\n))|(?= {2,}\n))/
+	var isInBbox = function isInBbox(bbox, point) {
+	  return bbox.ll.x <= point.x && point.x <= bbox.ur.x && bbox.ll.y <= point.y && point.y <= bbox.ur.y;
 	};
+	/* Returns either null, or a bbox (aka an ordered pair of points)
+	 * If there is only one point of overlap, a bbox with identical points
+	 * will be returned */
 
-	// list of punctuation marks from common mark spec
-	// without ` and ] to workaround Rule 17 (inline code blocks/links)
-	inline._punctuation = '!"#$%&\'()*+\\-./:;<=>?@\\[^_{|}~';
-	inline.em = edit$1(inline.em).replace(/punctuation/g, inline._punctuation).getRegex();
 
-	inline._escapes = /\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/g;
+	var getBboxOverlap = function getBboxOverlap(b1, b2) {
+	  // check if the bboxes overlap at all
+	  if (b2.ur.x < b1.ll.x || b1.ur.x < b2.ll.x || b2.ur.y < b1.ll.y || b1.ur.y < b2.ll.y) return null; // find the middle two X values
 
-	inline._scheme = /[a-zA-Z][a-zA-Z0-9+.-]{1,31}/;
-	inline._email = /[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+(@)[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+(?![-_])/;
-	inline.autolink = edit$1(inline.autolink)
-	  .replace('scheme', inline._scheme)
-	  .replace('email', inline._email)
-	  .getRegex();
+	  var lowerX = b1.ll.x < b2.ll.x ? b2.ll.x : b1.ll.x;
+	  var upperX = b1.ur.x < b2.ur.x ? b1.ur.x : b2.ur.x; // find the middle two Y values
 
-	inline._attribute = /\s+[a-zA-Z:_][\w.:-]*(?:\s*=\s*"[^"]*"|\s*=\s*'[^']*'|\s*=\s*[^\s"'=<>`]+)?/;
+	  var lowerY = b1.ll.y < b2.ll.y ? b2.ll.y : b1.ll.y;
+	  var upperY = b1.ur.y < b2.ur.y ? b1.ur.y : b2.ur.y; // put those middle values together to get the overlap
 
-	inline.tag = edit$1(inline.tag)
-	  .replace('comment', block._comment)
-	  .replace('attribute', inline._attribute)
-	  .getRegex();
+	  return {
+	    ll: {
+	      x: lowerX,
+	      y: lowerY
+	    },
+	    ur: {
+	      x: upperX,
+	      y: upperY
+	    }
+	  };
+	};
+	/* Javascript doesn't do integer math. Everything is
+	 * floating point with percision Number.EPSILON.
+	 *
+	 * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/EPSILON
+	 */
 
-	inline._label = /(?:\[[^\[\]]*\]|\\.|`[^`]*`|[^\[\]\\`])*?/;
-	inline._href = /<(?:\\[<>]?|[^\s<>\\])*>|[^\s\x00-\x1f]*/;
-	inline._title = /"(?:\\"?|[^"\\])*"|'(?:\\'?|[^'\\])*'|\((?:\\\)?|[^)\\])*\)/;
 
-	inline.link = edit$1(inline.link)
-	  .replace('label', inline._label)
-	  .replace('href', inline._href)
-	  .replace('title', inline._title)
-	  .getRegex();
+	var epsilon = Number.EPSILON; // IE Polyfill
 
-	inline.reflink = edit$1(inline.reflink)
-	  .replace('label', inline._label)
-	  .getRegex();
+	if (epsilon === undefined) epsilon = Math.pow(2, -52);
+	var EPSILON_SQ = epsilon * epsilon;
+	/* FLP comparator */
 
-	/**
-	 * Normal Inline Grammar
-	 */
+	var cmp = function cmp(a, b) {
+	  // check if they're both 0
+	  if (-epsilon < a && a < epsilon) {
+	    if (-epsilon < b && b < epsilon) {
+	      return 0;
+	    }
+	  } // check if they're flp equal
 
-	inline.normal = merge$2({}, inline);
 
-	/**
-	 * Pedantic Inline Grammar
-	 */
+	  var ab = a - b;
 
-	inline.pedantic = merge$2({}, inline.normal, {
-	  strong: /^__(?=\S)([\s\S]*?\S)__(?!_)|^\*\*(?=\S)([\s\S]*?\S)\*\*(?!\*)/,
-	  em: /^_(?=\S)([\s\S]*?\S)_(?!_)|^\*(?=\S)([\s\S]*?\S)\*(?!\*)/,
-	  link: edit$1(/^!?\[(label)\]\((.*?)\)/)
-	    .replace('label', inline._label)
-	    .getRegex(),
-	  reflink: edit$1(/^!?\[(label)\]\s*\[([^\]]*)\]/)
-	    .replace('label', inline._label)
-	    .getRegex()
-	});
+	  if (ab * ab < EPSILON_SQ * a * b) {
+	    return 0;
+	  } // normal comparison
 
+
+	  return a < b ? -1 : 1;
+	};
 	/**
-	 * GFM Inline Grammar
+	 * This class rounds incoming values sufficiently so that
+	 * floating points problems are, for the most part, avoided.
+	 *
+	 * Incoming points are have their x & y values tested against
+	 * all previously seen x & y values. If either is 'too close'
+	 * to a previously seen value, it's value is 'snapped' to the
+	 * previously seen value.
+	 *
+	 * All points should be rounded by this class before being
+	 * stored in any data structures in the rest of this algorithm.
 	 */
 
-	inline.gfm = merge$2({}, inline.normal, {
-	  escape: edit$1(inline.escape).replace('])', '~|])').getRegex(),
-	  _extended_email: /[A-Za-z0-9._+-]+(@)[a-zA-Z0-9-_]+(?:\.[a-zA-Z0-9-_]*[a-zA-Z0-9])+(?![-_])/,
-	  url: /^((?:ftp|https?):\/\/|www\.)(?:[a-zA-Z0-9\-]+\.?)+[^\s<]*|^email/,
-	  _backpedal: /(?:[^?!.,:;*_~()&]+|\([^)]*\)|&(?![a-zA-Z0-9]+;$)|[?!.,:;*_~)]+(?!$))+/,
-	  del: /^~+(?=\S)([\s\S]*?\S)~+/,
-	  text: /^(`+|[^`])(?:[\s\S]*?(?:(?=[\\<!\[`*~]|\b_|https?:\/\/|ftp:\/\/|www\.|$)|[^ ](?= {2,}\n)|[^a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-](?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@))|(?= {2,}\n|[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@))/
-	});
 
-	inline.gfm.url = edit$1(inline.gfm.url, 'i')
-	  .replace('email', inline.gfm._extended_email)
-	  .getRegex();
-	/**
-	 * GFM + Line Breaks Inline Grammar
-	 */
+	var PtRounder = /*#__PURE__*/function () {
+	  function PtRounder() {
+	    _classCallCheck(this, PtRounder);
 
-	inline.breaks = merge$2({}, inline.gfm, {
-	  br: edit$1(inline.br).replace('{2,}', '*').getRegex(),
-	  text: edit$1(inline.gfm.text)
-	    .replace('\\b_', '\\b_| {2,}\\n')
-	    .replace(/\{2,\}/g, '*')
-	    .getRegex()
-	});
+	    this.reset();
+	  }
 
-	var rules = {
-	  block: block,
-	  inline: inline
-	};
+	  _createClass(PtRounder, [{
+	    key: "reset",
+	    value: function reset() {
+	      this.xRounder = new CoordRounder();
+	      this.yRounder = new CoordRounder();
+	    }
+	  }, {
+	    key: "round",
+	    value: function round(x, y) {
+	      return {
+	        x: this.xRounder.round(x),
+	        y: this.yRounder.round(y)
+	      };
+	    }
+	  }]);
 
-	var defaults$2 = defaults.defaults;
-	var block$1 = rules.block;
-	var inline$1 = rules.inline;
+	  return PtRounder;
+	}();
 
-	/**
-	 * smartypants text replacement
-	 */
-	function smartypants(text) {
-	  return text
-	    // em-dashes
-	    .replace(/---/g, '\u2014')
-	    // en-dashes
-	    .replace(/--/g, '\u2013')
-	    // opening singles
-	    .replace(/(^|[-\u2014/(\[{"\s])'/g, '$1\u2018')
-	    // closing singles & apostrophes
-	    .replace(/'/g, '\u2019')
-	    // opening doubles
-	    .replace(/(^|[-\u2014/(\[{\u2018\s])"/g, '$1\u201c')
-	    // closing doubles
-	    .replace(/"/g, '\u201d')
-	    // ellipses
-	    .replace(/\.{3}/g, '\u2026');
-	}
+	var CoordRounder = /*#__PURE__*/function () {
+	  function CoordRounder() {
+	    _classCallCheck(this, CoordRounder);
 
-	/**
-	 * mangle email addresses
-	 */
-	function mangle(text) {
-	  var out = '',
-	    i,
-	    ch;
+	    this.tree = new Tree(); // preseed with 0 so we don't end up with values < Number.EPSILON
 
-	  var l = text.length;
-	  for (i = 0; i < l; i++) {
-	    ch = text.charCodeAt(i);
-	    if (Math.random() > 0.5) {
-	      ch = 'x' + ch.toString(16);
-	    }
-	    out += '&#' + ch + ';';
-	  }
+	    this.round(0);
+	  } // Note: this can rounds input values backwards or forwards.
+	  //       You might ask, why not restrict this to just rounding
+	  //       forwards? Wouldn't that allow left endpoints to always
+	  //       remain left endpoints during splitting (never change to
+	  //       right). No - it wouldn't, because we snap intersections
+	  //       to endpoints (to establish independence from the segment
+	  //       angle for t-intersections).
 
-	  return out;
-	}
 
-	/**
-	 * Block Lexer
-	 */
-	var Lexer_1 = /*@__PURE__*/(function () {
-	  function Lexer(options) {
-	    this.tokens = [];
-	    this.tokens.links = Object.create(null);
-	    this.options = options || defaults$2;
-	    this.options.tokenizer = this.options.tokenizer || new Tokenizer_1();
-	    this.tokenizer = this.options.tokenizer;
-	    this.tokenizer.options = this.options;
+	  _createClass(CoordRounder, [{
+	    key: "round",
+	    value: function round(coord) {
+	      var node = this.tree.add(coord);
+	      var prevNode = this.tree.prev(node);
 
-	    var rules = {
-	      block: block$1.normal,
-	      inline: inline$1.normal
-	    };
+	      if (prevNode !== null && cmp(node.key, prevNode.key) === 0) {
+	        this.tree.remove(coord);
+	        return prevNode.key;
+	      }
 
-	    if (this.options.pedantic) {
-	      rules.block = block$1.pedantic;
-	      rules.inline = inline$1.pedantic;
-	    } else if (this.options.gfm) {
-	      rules.block = block$1.gfm;
-	      if (this.options.breaks) {
-	        rules.inline = inline$1.breaks;
-	      } else {
-	        rules.inline = inline$1.gfm;
+	      var nextNode = this.tree.next(node);
+
+	      if (nextNode !== null && cmp(node.key, nextNode.key) === 0) {
+	        this.tree.remove(coord);
+	        return nextNode.key;
 	      }
+
+	      return coord;
 	    }
-	    this.tokenizer.rules = rules;
-	  }
+	  }]);
 
-	  var staticAccessors = { rules: { configurable: true } };
+	  return CoordRounder;
+	}(); // singleton available by import
 
-	  /**
-	   * Expose Rules
-	   */
-	  staticAccessors.rules.get = function () {
-	    return {
-	      block: block$1,
-	      inline: inline$1
-	    };
+
+	var rounder = new PtRounder();
+	/* Cross Product of two vectors with first point at origin */
+
+	var crossProduct = function crossProduct(a, b) {
+	  return a.x * b.y - a.y * b.x;
+	};
+	/* Dot Product of two vectors with first point at origin */
+
+
+	var dotProduct = function dotProduct(a, b) {
+	  return a.x * b.x + a.y * b.y;
+	};
+	/* Comparator for two vectors with same starting point */
+
+
+	var compareVectorAngles = function compareVectorAngles(basePt, endPt1, endPt2) {
+	  var v1 = {
+	    x: endPt1.x - basePt.x,
+	    y: endPt1.y - basePt.y
 	  };
+	  var v2 = {
+	    x: endPt2.x - basePt.x,
+	    y: endPt2.y - basePt.y
+	  };
+	  var kross = crossProduct(v1, v2);
+	  return cmp(kross, 0);
+	};
 
-	  /**
-	   * Static Lex Method
-	   */
-	  Lexer.lex = function lex (src, options) {
-	    var lexer = new Lexer(options);
-	    return lexer.lex(src);
+	var length = function length(v) {
+	  return Math.sqrt(dotProduct(v, v));
+	};
+	/* Get the sine of the angle from pShared -> pAngle to pShaed -> pBase */
+
+
+	var sineOfAngle = function sineOfAngle(pShared, pBase, pAngle) {
+	  var vBase = {
+	    x: pBase.x - pShared.x,
+	    y: pBase.y - pShared.y
+	  };
+	  var vAngle = {
+	    x: pAngle.x - pShared.x,
+	    y: pAngle.y - pShared.y
 	  };
+	  return crossProduct(vAngle, vBase) / length(vAngle) / length(vBase);
+	};
+	/* Get the cosine of the angle from pShared -> pAngle to pShaed -> pBase */
 
-	  /**
-	   * Preprocessing
-	   */
-	  Lexer.prototype.lex = function lex (src) {
-	    src = src
-	      .replace(/\r\n|\r/g, '\n')
-	      .replace(/\t/g, '    ');
 
-	    this.blockTokens(src, this.tokens, true);
+	var cosineOfAngle = function cosineOfAngle(pShared, pBase, pAngle) {
+	  var vBase = {
+	    x: pBase.x - pShared.x,
+	    y: pBase.y - pShared.y
+	  };
+	  var vAngle = {
+	    x: pAngle.x - pShared.x,
+	    y: pAngle.y - pShared.y
+	  };
+	  return dotProduct(vAngle, vBase) / length(vAngle) / length(vBase);
+	};
+	/* Get the x coordinate where the given line (defined by a point and vector)
+	 * crosses the horizontal line with the given y coordiante.
+	 * In the case of parrallel lines (including overlapping ones) returns null. */
 
-	    this.inline(this.tokens);
 
-	    return this.tokens;
+	var horizontalIntersection = function horizontalIntersection(pt, v, y) {
+	  if (v.y === 0) return null;
+	  return {
+	    x: pt.x + v.x / v.y * (y - pt.y),
+	    y: y
 	  };
+	};
+	/* Get the y coordinate where the given line (defined by a point and vector)
+	 * crosses the vertical line with the given x coordiante.
+	 * In the case of parrallel lines (including overlapping ones) returns null. */
 
-	  /**
-	   * Lexing
-	   */
-	  Lexer.prototype.blockTokens = function blockTokens (src, tokens, top) {
-	    if ( tokens === void 0 ) tokens = [];
-	    if ( top === void 0 ) top = true;
-
-	    src = src.replace(/^ +$/gm, '');
-	    var token, i, l;
-
-	    while (src) {
-	      // newline
-	      if (token = this.tokenizer.space(src)) {
-	        src = src.substring(token.raw.length);
-	        if (token.type) {
-	          tokens.push(token);
-	        }
-	        continue;
-	      }
 
-	      // code
-	      if (token = this.tokenizer.code(src, tokens)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	var verticalIntersection = function verticalIntersection(pt, v, x) {
+	  if (v.x === 0) return null;
+	  return {
+	    x: x,
+	    y: pt.y + v.y / v.x * (x - pt.x)
+	  };
+	};
+	/* Get the intersection of two lines, each defined by a base point and a vector.
+	 * In the case of parrallel lines (including overlapping ones) returns null. */
+
+
+	var intersection = function intersection(pt1, v1, pt2, v2) {
+	  // take some shortcuts for vertical and horizontal lines
+	  // this also ensures we don't calculate an intersection and then discover
+	  // it's actually outside the bounding box of the line
+	  if (v1.x === 0) return verticalIntersection(pt2, v2, pt1.x);
+	  if (v2.x === 0) return verticalIntersection(pt1, v1, pt2.x);
+	  if (v1.y === 0) return horizontalIntersection(pt2, v2, pt1.y);
+	  if (v2.y === 0) return horizontalIntersection(pt1, v1, pt2.y); // General case for non-overlapping segments.
+	  // This algorithm is based on Schneider and Eberly.
+	  // http://www.cimec.org.ar/~ncalvo/Schneider_Eberly.pdf - pg 244
+
+	  var kross = crossProduct(v1, v2);
+	  if (kross == 0) return null;
+	  var ve = {
+	    x: pt2.x - pt1.x,
+	    y: pt2.y - pt1.y
+	  };
+	  var d1 = crossProduct(ve, v1) / kross;
+	  var d2 = crossProduct(ve, v2) / kross; // take the average of the two calculations to minimize rounding error
+
+	  var x1 = pt1.x + d2 * v1.x,
+	      x2 = pt2.x + d1 * v2.x;
+	  var y1 = pt1.y + d2 * v1.y,
+	      y2 = pt2.y + d1 * v2.y;
+	  var x = (x1 + x2) / 2;
+	  var y = (y1 + y2) / 2;
+	  return {
+	    x: x,
+	    y: y
+	  };
+	};
 
-	      // fences
-	      if (token = this.tokenizer.fences(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	var SweepEvent = /*#__PURE__*/function () {
+	  _createClass(SweepEvent, null, [{
+	    key: "compare",
+	    // for ordering sweep events in the sweep event queue
+	    value: function compare(a, b) {
+	      // favor event with a point that the sweep line hits first
+	      var ptCmp = SweepEvent.comparePoints(a.point, b.point);
+	      if (ptCmp !== 0) return ptCmp; // the points are the same, so link them if needed
 
-	      // heading
-	      if (token = this.tokenizer.heading(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	      if (a.point !== b.point) a.link(b); // favor right events over left
 
-	      // table no leading pipe (gfm)
-	      if (token = this.tokenizer.nptable(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	      if (a.isLeft !== b.isLeft) return a.isLeft ? 1 : -1; // we have two matching left or right endpoints
+	      // ordering of this case is the same as for their segments
 
-	      // hr
-	      if (token = this.tokenizer.hr(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
+	      return Segment.compare(a.segment, b.segment);
+	    } // for ordering points in sweep line order
+
+	  }, {
+	    key: "comparePoints",
+	    value: function comparePoints(aPt, bPt) {
+	      if (aPt.x < bPt.x) return -1;
+	      if (aPt.x > bPt.x) return 1;
+	      if (aPt.y < bPt.y) return -1;
+	      if (aPt.y > bPt.y) return 1;
+	      return 0;
+	    } // Warning: 'point' input will be modified and re-used (for performance)
+
+	  }]);
+
+	  function SweepEvent(point, isLeft) {
+	    _classCallCheck(this, SweepEvent);
+
+	    if (point.events === undefined) point.events = [this];else point.events.push(this);
+	    this.point = point;
+	    this.isLeft = isLeft; // this.segment, this.otherSE set by factory
+	  }
+
+	  _createClass(SweepEvent, [{
+	    key: "link",
+	    value: function link(other) {
+	      if (other.point === this.point) {
+	        throw new Error('Tried to link already linked events');
 	      }
 
-	      // blockquote
-	      if (token = this.tokenizer.blockquote(src)) {
-	        src = src.substring(token.raw.length);
-	        token.tokens = this.blockTokens(token.text, [], top);
-	        tokens.push(token);
-	        continue;
+	      var otherEvents = other.point.events;
+
+	      for (var i = 0, iMax = otherEvents.length; i < iMax; i++) {
+	        var evt = otherEvents[i];
+	        this.point.events.push(evt);
+	        evt.point = this.point;
 	      }
 
-	      // list
-	      if (token = this.tokenizer.list(src)) {
-	        src = src.substring(token.raw.length);
-	        l = token.items.length;
-	        for (i = 0; i < l; i++) {
-	          token.items[i].tokens = this.blockTokens(token.items[i].text, [], false);
+	      this.checkForConsuming();
+	    }
+	    /* Do a pass over our linked events and check to see if any pair
+	     * of segments match, and should be consumed. */
+
+	  }, {
+	    key: "checkForConsuming",
+	    value: function checkForConsuming() {
+	      // FIXME: The loops in this method run O(n^2) => no good.
+	      //        Maintain little ordered sweep event trees?
+	      //        Can we maintaining an ordering that avoids the need
+	      //        for the re-sorting with getLeftmostComparator in geom-out?
+	      // Compare each pair of events to see if other events also match
+	      var numEvents = this.point.events.length;
+
+	      for (var i = 0; i < numEvents; i++) {
+	        var evt1 = this.point.events[i];
+	        if (evt1.segment.consumedBy !== undefined) continue;
+
+	        for (var j = i + 1; j < numEvents; j++) {
+	          var evt2 = this.point.events[j];
+	          if (evt2.consumedBy !== undefined) continue;
+	          if (evt1.otherSE.point.events !== evt2.otherSE.point.events) continue;
+	          evt1.segment.consume(evt2.segment);
 	        }
-	        tokens.push(token);
-	        continue;
 	      }
+	    }
+	  }, {
+	    key: "getAvailableLinkedEvents",
+	    value: function getAvailableLinkedEvents() {
+	      // point.events is always of length 2 or greater
+	      var events = [];
 
-	      // html
-	      if (token = this.tokenizer.html(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	      for (var i = 0, iMax = this.point.events.length; i < iMax; i++) {
+	        var evt = this.point.events[i];
 
-	      // def
-	      if (top && (token = this.tokenizer.def(src))) {
-	        src = src.substring(token.raw.length);
-	        if (!this.tokens.links[token.tag]) {
-	          this.tokens.links[token.tag] = {
-	            href: token.href,
-	            title: token.title
-	          };
+	        if (evt !== this && !evt.segment.ringOut && evt.segment.isInResult()) {
+	          events.push(evt);
 	        }
-	        continue;
 	      }
 
-	      // table (gfm)
-	      if (token = this.tokenizer.table(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	      return events;
+	    }
+	    /**
+	     * Returns a comparator function for sorting linked events that will
+	     * favor the event that will give us the smallest left-side angle.
+	     * All ring construction starts as low as possible heading to the right,
+	     * so by always turning left as sharp as possible we'll get polygons
+	     * without uncessary loops & holes.
+	     *
+	     * The comparator function has a compute cache such that it avoids
+	     * re-computing already-computed values.
+	     */
 
-	      // lheading
-	      if (token = this.tokenizer.lheading(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	  }, {
+	    key: "getLeftmostComparator",
+	    value: function getLeftmostComparator(baseEvent) {
+	      var _this = this;
 
-	      // top-level paragraph
-	      if (top && (token = this.tokenizer.paragraph(src))) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	      var cache = new Map();
 
-	      // text
-	      if (token = this.tokenizer.text(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	      var fillCache = function fillCache(linkedEvent) {
+	        var nextEvent = linkedEvent.otherSE;
+	        cache.set(linkedEvent, {
+	          sine: sineOfAngle(_this.point, baseEvent.point, nextEvent.point),
+	          cosine: cosineOfAngle(_this.point, baseEvent.point, nextEvent.point)
+	        });
+	      };
 
-	      if (src) {
-	        var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
-	        if (this.options.silent) {
-	          console.error(errMsg);
-	          break;
-	        } else {
-	          throw new Error(errMsg);
-	        }
-	      }
-	    }
+	      return function (a, b) {
+	        if (!cache.has(a)) fillCache(a);
+	        if (!cache.has(b)) fillCache(b);
 
-	    return tokens;
-	  };
+	        var _cache$get = cache.get(a),
+	            asine = _cache$get.sine,
+	            acosine = _cache$get.cosine;
 
-	  Lexer.prototype.inline = function inline (tokens) {
-	    var i,
-	      j,
-	      k,
-	      l2,
-	      row,
-	      token;
+	        var _cache$get2 = cache.get(b),
+	            bsine = _cache$get2.sine,
+	            bcosine = _cache$get2.cosine; // both on or above x-axis
 
-	    var l = tokens.length;
-	    for (i = 0; i < l; i++) {
-	      token = tokens[i];
-	      switch (token.type) {
-	        case 'paragraph':
-	        case 'text':
-	        case 'heading': {
-	          token.tokens = [];
-	          this.inlineTokens(token.text, token.tokens);
-	          break;
-	        }
-	        case 'table': {
-	          token.tokens = {
-	            header: [],
-	            cells: []
-	          };
 
-	          // header
-	          l2 = token.header.length;
-	          for (j = 0; j < l2; j++) {
-	            token.tokens.header[j] = [];
-	            this.inlineTokens(token.header[j], token.tokens.header[j]);
-	          }
+	        if (asine >= 0 && bsine >= 0) {
+	          if (acosine < bcosine) return 1;
+	          if (acosine > bcosine) return -1;
+	          return 0;
+	        } // both below x-axis
 
-	          // cells
-	          l2 = token.cells.length;
-	          for (j = 0; j < l2; j++) {
-	            row = token.cells[j];
-	            token.tokens.cells[j] = [];
-	            for (k = 0; k < row.length; k++) {
-	              token.tokens.cells[j][k] = [];
-	              this.inlineTokens(row[k], token.tokens.cells[j][k]);
-	            }
-	          }
 
-	          break;
-	        }
-	        case 'blockquote': {
-	          this.inline(token.tokens);
-	          break;
-	        }
-	        case 'list': {
-	          l2 = token.items.length;
-	          for (j = 0; j < l2; j++) {
-	            this.inline(token.items[j].tokens);
-	          }
-	          break;
-	        }
-	      }
+	        if (asine < 0 && bsine < 0) {
+	          if (acosine < bcosine) return -1;
+	          if (acosine > bcosine) return 1;
+	          return 0;
+	        } // one above x-axis, one below
+
+
+	        if (bsine < asine) return -1;
+	        if (bsine > asine) return 1;
+	        return 0;
+	      };
 	    }
+	  }]);
 
-	    return tokens;
-	  };
+	  return SweepEvent;
+	}(); // segments and sweep events when all else is identical
 
-	  /**
-	   * Lexing/Compiling
-	   */
-	  Lexer.prototype.inlineTokens = function inlineTokens (src, tokens, inLink, inRawBlock) {
-	    if ( tokens === void 0 ) tokens = [];
-	    if ( inLink === void 0 ) inLink = false;
-	    if ( inRawBlock === void 0 ) inRawBlock = false;
-
-	    var token;
-
-	    while (src) {
-	      // escape
-	      if (token = this.tokenizer.escape(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
 
-	      // tag
-	      if (token = this.tokenizer.tag(src, inLink, inRawBlock)) {
-	        src = src.substring(token.raw.length);
-	        inLink = token.inLink;
-	        inRawBlock = token.inRawBlock;
-	        tokens.push(token);
-	        continue;
-	      }
+	var segmentId = 0;
 
-	      // link
-	      if (token = this.tokenizer.link(src)) {
-	        src = src.substring(token.raw.length);
-	        if (token.type === 'link') {
-	          token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
-	        }
-	        tokens.push(token);
-	        continue;
-	      }
+	var Segment = /*#__PURE__*/function () {
+	  _createClass(Segment, null, [{
+	    key: "compare",
 
-	      // reflink, nolink
-	      if (token = this.tokenizer.reflink(src, this.tokens.links)) {
-	        src = src.substring(token.raw.length);
-	        if (token.type === 'link') {
-	          token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
-	        }
-	        tokens.push(token);
-	        continue;
-	      }
+	    /* This compare() function is for ordering segments in the sweep
+	     * line tree, and does so according to the following criteria:
+	     *
+	     * Consider the vertical line that lies an infinestimal step to the
+	     * right of the right-more of the two left endpoints of the input
+	     * segments. Imagine slowly moving a point up from negative infinity
+	     * in the increasing y direction. Which of the two segments will that
+	     * point intersect first? That segment comes 'before' the other one.
+	     *
+	     * If neither segment would be intersected by such a line, (if one
+	     * or more of the segments are vertical) then the line to be considered
+	     * is directly on the right-more of the two left inputs.
+	     */
+	    value: function compare(a, b) {
+	      var alx = a.leftSE.point.x;
+	      var blx = b.leftSE.point.x;
+	      var arx = a.rightSE.point.x;
+	      var brx = b.rightSE.point.x; // check if they're even in the same vertical plane
+
+	      if (brx < alx) return 1;
+	      if (arx < blx) return -1;
+	      var aly = a.leftSE.point.y;
+	      var bly = b.leftSE.point.y;
+	      var ary = a.rightSE.point.y;
+	      var bry = b.rightSE.point.y; // is left endpoint of segment B the right-more?
+
+	      if (alx < blx) {
+	        // are the two segments in the same horizontal plane?
+	        if (bly < aly && bly < ary) return 1;
+	        if (bly > aly && bly > ary) return -1; // is the B left endpoint colinear to segment A?
+
+	        var aCmpBLeft = a.comparePoint(b.leftSE.point);
+	        if (aCmpBLeft < 0) return 1;
+	        if (aCmpBLeft > 0) return -1; // is the A right endpoint colinear to segment B ?
+
+	        var bCmpARight = b.comparePoint(a.rightSE.point);
+	        if (bCmpARight !== 0) return bCmpARight; // colinear segments, consider the one with left-more
+	        // left endpoint to be first (arbitrary?)
 
-	      // strong
-	      if (token = this.tokenizer.strong(src)) {
-	        src = src.substring(token.raw.length);
-	        token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
-	        tokens.push(token);
-	        continue;
-	      }
+	        return -1;
+	      } // is left endpoint of segment A the right-more?
 
-	      // em
-	      if (token = this.tokenizer.em(src)) {
-	        src = src.substring(token.raw.length);
-	        token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
-	        tokens.push(token);
-	        continue;
-	      }
 
-	      // code
-	      if (token = this.tokenizer.codespan(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	      if (alx > blx) {
+	        if (aly < bly && aly < bry) return -1;
+	        if (aly > bly && aly > bry) return 1; // is the A left endpoint colinear to segment B?
 
-	      // br
-	      if (token = this.tokenizer.br(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	        var bCmpALeft = b.comparePoint(a.leftSE.point);
+	        if (bCmpALeft !== 0) return bCmpALeft; // is the B right endpoint colinear to segment A?
 
-	      // del (gfm)
-	      if (token = this.tokenizer.del(src)) {
-	        src = src.substring(token.raw.length);
-	        token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
-	        tokens.push(token);
-	        continue;
-	      }
+	        var aCmpBRight = a.comparePoint(b.rightSE.point);
+	        if (aCmpBRight < 0) return 1;
+	        if (aCmpBRight > 0) return -1; // colinear segments, consider the one with left-more
+	        // left endpoint to be first (arbitrary?)
 
-	      // autolink
-	      if (token = this.tokenizer.autolink(src, mangle)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	        return 1;
+	      } // if we get here, the two left endpoints are in the same
+	      // vertical plane, ie alx === blx
+	      // consider the lower left-endpoint to come first
 
-	      // url (gfm)
-	      if (!inLink && (token = this.tokenizer.url(src, mangle))) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
 
-	      // text
-	      if (token = this.tokenizer.inlineText(src, inRawBlock, smartypants)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	      if (aly < bly) return -1;
+	      if (aly > bly) return 1; // left endpoints are identical
+	      // check for colinearity by using the left-more right endpoint
+	      // is the A right endpoint more left-more?
 
-	      if (src) {
-	        var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
-	        if (this.options.silent) {
-	          console.error(errMsg);
-	          break;
-	        } else {
-	          throw new Error(errMsg);
-	        }
+	      if (arx < brx) {
+	        var _bCmpARight = b.comparePoint(a.rightSE.point);
+
+	        if (_bCmpARight !== 0) return _bCmpARight;
+	      } // is the B right endpoint more left-more?
+
+
+	      if (arx > brx) {
+	        var _aCmpBRight = a.comparePoint(b.rightSE.point);
+
+	        if (_aCmpBRight < 0) return 1;
+	        if (_aCmpBRight > 0) return -1;
 	      }
-	    }
 
-	    return tokens;
-	  };
+	      if (arx !== brx) {
+	        // are these two [almost] vertical segments with opposite orientation?
+	        // if so, the one with the lower right endpoint comes first
+	        var ay = ary - aly;
+	        var ax = arx - alx;
+	        var by = bry - bly;
+	        var bx = brx - blx;
+	        if (ay > ax && by < bx) return 1;
+	        if (ay < ax && by > bx) return -1;
+	      } // we have colinear segments with matching orientation
+	      // consider the one with more left-more right endpoint to be first
 
-	  Object.defineProperties( Lexer, staticAccessors );
 
-	  return Lexer;
-	}());
+	      if (arx > brx) return 1;
+	      if (arx < brx) return -1; // if we get here, two two right endpoints are in the same
+	      // vertical plane, ie arx === brx
+	      // consider the lower right-endpoint to come first
 
-	var defaults$3 = defaults.defaults;
-	var cleanUrl$1 = helpers.cleanUrl;
-	var escape$3 = helpers.escape;
+	      if (ary < bry) return -1;
+	      if (ary > bry) return 1; // right endpoints identical as well, so the segments are idential
+	      // fall back on creation order as consistent tie-breaker
 
-	/**
-	 * Renderer
-	 */
-	var Renderer_1 = /*@__PURE__*/(function () {
-	  function Renderer(options) {
-	    this.options = options || defaults$3;
-	  }
+	      if (a.id < b.id) return -1;
+	      if (a.id > b.id) return 1; // identical segment, ie a === b
 
-	  Renderer.prototype.code = function code (code$1, infostring, escaped) {
-	    var lang = (infostring || '').match(/\S*/)[0];
-	    if (this.options.highlight) {
-	      var out = this.options.highlight(code$1, lang);
-	      if (out != null && out !== code$1) {
-	        escaped = true;
-	        code$1 = out;
-	      }
+	      return 0;
 	    }
+	    /* Warning: a reference to ringWindings input will be stored,
+	     *  and possibly will be later modified */
 
-	    if (!lang) {
-	      return '<pre><code>'
-	        + (escaped ? code$1 : escape$3(code$1, true))
-	        + '</code></pre>';
-	    }
+	  }]);
 
-	    return '<pre><code class="'
-	      + this.options.langPrefix
-	      + escape$3(lang, true)
-	      + '">'
-	      + (escaped ? code$1 : escape$3(code$1, true))
-	      + '</code></pre>\n';
-	  };
+	  function Segment(leftSE, rightSE, rings, windings) {
+	    _classCallCheck(this, Segment);
 
-	  Renderer.prototype.blockquote = function blockquote (quote) {
-	    return '<blockquote>\n' + quote + '</blockquote>\n';
-	  };
+	    this.id = ++segmentId;
+	    this.leftSE = leftSE;
+	    leftSE.segment = this;
+	    leftSE.otherSE = rightSE;
+	    this.rightSE = rightSE;
+	    rightSE.segment = this;
+	    rightSE.otherSE = leftSE;
+	    this.rings = rings;
+	    this.windings = windings; // left unset for performance, set later in algorithm
+	    // this.ringOut, this.consumedBy, this.prev
+	  }
 
-	  Renderer.prototype.html = function html (html$1) {
-	    return html$1;
-	  };
+	  _createClass(Segment, [{
+	    key: "replaceRightSE",
 
-	  Renderer.prototype.heading = function heading (text, level, raw, slugger) {
-	    if (this.options.headerIds) {
-	      return '<h'
-	        + level
-	        + ' id="'
-	        + this.options.headerPrefix
-	        + slugger.slug(raw)
-	        + '">'
-	        + text
-	        + '</h'
-	        + level
-	        + '>\n';
+	    /* When a segment is split, the rightSE is replaced with a new sweep event */
+	    value: function replaceRightSE(newRightSE) {
+	      this.rightSE = newRightSE;
+	      this.rightSE.segment = this;
+	      this.rightSE.otherSE = this.leftSE;
+	      this.leftSE.otherSE = this.rightSE;
 	    }
-	    // ignore IDs
-	    return '<h' + level + '>' + text + '</h' + level + '>\n';
-	  };
+	  }, {
+	    key: "bbox",
+	    value: function bbox() {
+	      var y1 = this.leftSE.point.y;
+	      var y2 = this.rightSE.point.y;
+	      return {
+	        ll: {
+	          x: this.leftSE.point.x,
+	          y: y1 < y2 ? y1 : y2
+	        },
+	        ur: {
+	          x: this.rightSE.point.x,
+	          y: y1 > y2 ? y1 : y2
+	        }
+	      };
+	    }
+	    /* A vector from the left point to the right */
 
-	  Renderer.prototype.hr = function hr () {
-	    return this.options.xhtml ? '<hr/>\n' : '<hr>\n';
-	  };
+	  }, {
+	    key: "vector",
+	    value: function vector() {
+	      return {
+	        x: this.rightSE.point.x - this.leftSE.point.x,
+	        y: this.rightSE.point.y - this.leftSE.point.y
+	      };
+	    }
+	  }, {
+	    key: "isAnEndpoint",
+	    value: function isAnEndpoint(pt) {
+	      return pt.x === this.leftSE.point.x && pt.y === this.leftSE.point.y || pt.x === this.rightSE.point.x && pt.y === this.rightSE.point.y;
+	    }
+	    /* Compare this segment with a point.
+	     *
+	     * A point P is considered to be colinear to a segment if there
+	     * exists a distance D such that if we travel along the segment
+	     * from one * endpoint towards the other a distance D, we find
+	     * ourselves at point P.
+	     *
+	     * Return value indicates:
+	     *
+	     *   1: point lies above the segment (to the left of vertical)
+	     *   0: point is colinear to segment
+	     *  -1: point lies below the segment (to the right of vertical)
+	     */
 
-	  Renderer.prototype.list = function list (body, ordered, start) {
-	    var type = ordered ? 'ol' : 'ul',
-	      startatt = (ordered && start !== 1) ? (' start="' + start + '"') : '';
-	    return '<' + type + startatt + '>\n' + body + '</' + type + '>\n';
-	  };
+	  }, {
+	    key: "comparePoint",
+	    value: function comparePoint(point) {
+	      if (this.isAnEndpoint(point)) return 0;
+	      var lPt = this.leftSE.point;
+	      var rPt = this.rightSE.point;
+	      var v = this.vector(); // Exactly vertical segments.
+
+	      if (lPt.x === rPt.x) {
+	        if (point.x === lPt.x) return 0;
+	        return point.x < lPt.x ? 1 : -1;
+	      } // Nearly vertical segments with an intersection.
+	      // Check to see where a point on the line with matching Y coordinate is.
+
+
+	      var yDist = (point.y - lPt.y) / v.y;
+	      var xFromYDist = lPt.x + yDist * v.x;
+	      if (point.x === xFromYDist) return 0; // General case.
+	      // Check to see where a point on the line with matching X coordinate is.
+
+	      var xDist = (point.x - lPt.x) / v.x;
+	      var yFromXDist = lPt.y + xDist * v.y;
+	      if (point.y === yFromXDist) return 0;
+	      return point.y < yFromXDist ? -1 : 1;
+	    }
+	    /**
+	     * Given another segment, returns the first non-trivial intersection
+	     * between the two segments (in terms of sweep line ordering), if it exists.
+	     *
+	     * A 'non-trivial' intersection is one that will cause one or both of the
+	     * segments to be split(). As such, 'trivial' vs. 'non-trivial' intersection:
+	     *
+	     *   * endpoint of segA with endpoint of segB --> trivial
+	     *   * endpoint of segA with point along segB --> non-trivial
+	     *   * endpoint of segB with point along segA --> non-trivial
+	     *   * point along segA with point along segB --> non-trivial
+	     *
+	     * If no non-trivial intersection exists, return null
+	     * Else, return null.
+	     */
 
-	  Renderer.prototype.listitem = function listitem (text) {
-	    return '<li>' + text + '</li>\n';
-	  };
+	  }, {
+	    key: "getIntersection",
+	    value: function getIntersection(other) {
+	      // If bboxes don't overlap, there can't be any intersections
+	      var tBbox = this.bbox();
+	      var oBbox = other.bbox();
+	      var bboxOverlap = getBboxOverlap(tBbox, oBbox);
+	      if (bboxOverlap === null) return null; // We first check to see if the endpoints can be considered intersections.
+	      // This will 'snap' intersections to endpoints if possible, and will
+	      // handle cases of colinearity.
+
+	      var tlp = this.leftSE.point;
+	      var trp = this.rightSE.point;
+	      var olp = other.leftSE.point;
+	      var orp = other.rightSE.point; // does each endpoint touch the other segment?
+	      // note that we restrict the 'touching' definition to only allow segments
+	      // to touch endpoints that lie forward from where we are in the sweep line pass
+
+	      var touchesOtherLSE = isInBbox(tBbox, olp) && this.comparePoint(olp) === 0;
+	      var touchesThisLSE = isInBbox(oBbox, tlp) && other.comparePoint(tlp) === 0;
+	      var touchesOtherRSE = isInBbox(tBbox, orp) && this.comparePoint(orp) === 0;
+	      var touchesThisRSE = isInBbox(oBbox, trp) && other.comparePoint(trp) === 0; // do left endpoints match?
+
+	      if (touchesThisLSE && touchesOtherLSE) {
+	        // these two cases are for colinear segments with matching left
+	        // endpoints, and one segment being longer than the other
+	        if (touchesThisRSE && !touchesOtherRSE) return trp;
+	        if (!touchesThisRSE && touchesOtherRSE) return orp; // either the two segments match exactly (two trival intersections)
+	        // or just on their left endpoint (one trivial intersection
 
-	  Renderer.prototype.checkbox = function checkbox (checked) {
-	    return '<input '
-	      + (checked ? 'checked="" ' : '')
-	      + 'disabled="" type="checkbox"'
-	      + (this.options.xhtml ? ' /' : '')
-	      + '> ';
-	  };
+	        return null;
+	      } // does this left endpoint matches (other doesn't)
 
-	  Renderer.prototype.paragraph = function paragraph (text) {
-	    return '<p>' + text + '</p>\n';
-	  };
 
-	  Renderer.prototype.table = function table (header, body) {
-	    if (body) { body = '<tbody>' + body + '</tbody>'; }
+	      if (touchesThisLSE) {
+	        // check for segments that just intersect on opposing endpoints
+	        if (touchesOtherRSE) {
+	          if (tlp.x === orp.x && tlp.y === orp.y) return null;
+	        } // t-intersection on left endpoint
 
-	    return '<table>\n'
-	      + '<thead>\n'
-	      + header
-	      + '</thead>\n'
-	      + body
-	      + '</table>\n';
-	  };
 
-	  Renderer.prototype.tablerow = function tablerow (content) {
-	    return '<tr>\n' + content + '</tr>\n';
-	  };
+	        return tlp;
+	      } // does other left endpoint matches (this doesn't)
 
-	  Renderer.prototype.tablecell = function tablecell (content, flags) {
-	    var type = flags.header ? 'th' : 'td';
-	    var tag = flags.align
-	      ? '<' + type + ' align="' + flags.align + '">'
-	      : '<' + type + '>';
-	    return tag + content + '</' + type + '>\n';
-	  };
 
-	  // span level renderer
-	  Renderer.prototype.strong = function strong (text) {
-	    return '<strong>' + text + '</strong>';
-	  };
+	      if (touchesOtherLSE) {
+	        // check for segments that just intersect on opposing endpoints
+	        if (touchesThisRSE) {
+	          if (trp.x === olp.x && trp.y === olp.y) return null;
+	        } // t-intersection on left endpoint
 
-	  Renderer.prototype.em = function em (text) {
-	    return '<em>' + text + '</em>';
-	  };
 
-	  Renderer.prototype.codespan = function codespan (text) {
-	    return '<code>' + text + '</code>';
-	  };
+	        return olp;
+	      } // trivial intersection on right endpoints
 
-	  Renderer.prototype.br = function br () {
-	    return this.options.xhtml ? '<br/>' : '<br>';
-	  };
 
-	  Renderer.prototype.del = function del (text) {
-	    return '<del>' + text + '</del>';
-	  };
+	      if (touchesThisRSE && touchesOtherRSE) return null; // t-intersections on just one right endpoint
 
-	  Renderer.prototype.link = function link (href, title, text) {
-	    href = cleanUrl$1(this.options.sanitize, this.options.baseUrl, href);
-	    if (href === null) {
-	      return text;
-	    }
-	    var out = '<a href="' + escape$3(href) + '"';
-	    if (title) {
-	      out += ' title="' + title + '"';
-	    }
-	    out += '>' + text + '</a>';
-	    return out;
-	  };
+	      if (touchesThisRSE) return trp;
+	      if (touchesOtherRSE) return orp; // None of our endpoints intersect. Look for a general intersection between
+	      // infinite lines laid over the segments
 
-	  Renderer.prototype.image = function image (href, title, text) {
-	    href = cleanUrl$1(this.options.sanitize, this.options.baseUrl, href);
-	    if (href === null) {
-	      return text;
-	    }
+	      var pt = intersection(tlp, this.vector(), olp, other.vector()); // are the segments parrallel? Note that if they were colinear with overlap,
+	      // they would have an endpoint intersection and that case was already handled above
 
-	    var out = '<img src="' + href + '" alt="' + text + '"';
-	    if (title) {
-	      out += ' title="' + title + '"';
+	      if (pt === null) return null; // is the intersection found between the lines not on the segments?
+
+	      if (!isInBbox(bboxOverlap, pt)) return null; // round the the computed point if needed
+
+	      return rounder.round(pt.x, pt.y);
 	    }
-	    out += this.options.xhtml ? '/>' : '>';
-	    return out;
-	  };
+	    /**
+	     * Split the given segment into multiple segments on the given points.
+	     *  * Each existing segment will retain its leftSE and a new rightSE will be
+	     *    generated for it.
+	     *  * A new segment will be generated which will adopt the original segment's
+	     *    rightSE, and a new leftSE will be generated for it.
+	     *  * If there are more than two points given to split on, new segments
+	     *    in the middle will be generated with new leftSE and rightSE's.
+	     *  * An array of the newly generated SweepEvents will be returned.
+	     *
+	     * Warning: input array of points is modified
+	     */
 
-	  Renderer.prototype.text = function text (text$1) {
-	    return text$1;
-	  };
+	  }, {
+	    key: "split",
+	    value: function split(point) {
+	      var newEvents = [];
+	      var alreadyLinked = point.events !== undefined;
+	      var newLeftSE = new SweepEvent(point, true);
+	      var newRightSE = new SweepEvent(point, false);
+	      var oldRightSE = this.rightSE;
+	      this.replaceRightSE(newRightSE);
+	      newEvents.push(newRightSE);
+	      newEvents.push(newLeftSE);
+	      var newSeg = new Segment(newLeftSE, oldRightSE, this.rings.slice(), this.windings.slice()); // when splitting a nearly vertical downward-facing segment,
+	      // sometimes one of the resulting new segments is vertical, in which
+	      // case its left and right events may need to be swapped
+
+	      if (SweepEvent.comparePoints(newSeg.leftSE.point, newSeg.rightSE.point) > 0) {
+	        newSeg.swapEvents();
+	      }
 
-	  return Renderer;
-	}());
+	      if (SweepEvent.comparePoints(this.leftSE.point, this.rightSE.point) > 0) {
+	        this.swapEvents();
+	      } // in the point we just used to create new sweep events with was already
+	      // linked to other events, we need to check if either of the affected
+	      // segments should be consumed
 
-	/**
-	 * TextRenderer
-	 * returns only the textual part of the token
-	 */
-	var TextRenderer_1 = /*@__PURE__*/(function () {
-	  function TextRenderer () {}
 
-	  TextRenderer.prototype.strong = function strong (text) {
-	    return text;
-	  };
+	      if (alreadyLinked) {
+	        newLeftSE.checkForConsuming();
+	        newRightSE.checkForConsuming();
+	      }
 
-	  TextRenderer.prototype.em = function em (text) {
-	    return text;
-	  };
+	      return newEvents;
+	    }
+	    /* Swap which event is left and right */
 
-	  TextRenderer.prototype.codespan = function codespan (text) {
-	    return text;
-	  };
+	  }, {
+	    key: "swapEvents",
+	    value: function swapEvents() {
+	      var tmpEvt = this.rightSE;
+	      this.rightSE = this.leftSE;
+	      this.leftSE = tmpEvt;
+	      this.leftSE.isLeft = true;
+	      this.rightSE.isLeft = false;
+
+	      for (var i = 0, iMax = this.windings.length; i < iMax; i++) {
+	        this.windings[i] *= -1;
+	      }
+	    }
+	    /* Consume another segment. We take their rings under our wing
+	     * and mark them as consumed. Use for perfectly overlapping segments */
 
-	  TextRenderer.prototype.del = function del (text) {
-	    return text;
-	  };
+	  }, {
+	    key: "consume",
+	    value: function consume(other) {
+	      var consumer = this;
+	      var consumee = other;
 
-	  TextRenderer.prototype.html = function html (text) {
-	    return text;
-	  };
+	      while (consumer.consumedBy) {
+	        consumer = consumer.consumedBy;
+	      }
 
-	  TextRenderer.prototype.text = function text (text$1) {
-	    return text$1;
-	  };
+	      while (consumee.consumedBy) {
+	        consumee = consumee.consumedBy;
+	      }
 
-	  TextRenderer.prototype.link = function link (href, title, text) {
-	    return '' + text;
-	  };
+	      var cmp = Segment.compare(consumer, consumee);
+	      if (cmp === 0) return; // already consumed
+	      // the winner of the consumption is the earlier segment
+	      // according to sweep line ordering
 
-	  TextRenderer.prototype.image = function image (href, title, text) {
-	    return '' + text;
-	  };
+	      if (cmp > 0) {
+	        var tmp = consumer;
+	        consumer = consumee;
+	        consumee = tmp;
+	      } // make sure a segment doesn't consume it's prev
 
-	  TextRenderer.prototype.br = function br () {
-	    return '';
-	  };
 
-	  return TextRenderer;
-	}());
+	      if (consumer.prev === consumee) {
+	        var _tmp = consumer;
+	        consumer = consumee;
+	        consumee = _tmp;
+	      }
 
-	/**
-	 * Slugger generates header id
-	 */
-	var Slugger_1 = /*@__PURE__*/(function () {
-	  function Slugger() {
-	    this.seen = {};
-	  }
+	      for (var i = 0, iMax = consumee.rings.length; i < iMax; i++) {
+	        var ring = consumee.rings[i];
+	        var winding = consumee.windings[i];
+	        var index = consumer.rings.indexOf(ring);
 
-	  /**
-	   * Convert string to unique id
-	   */
-	  Slugger.prototype.slug = function slug (value) {
-	    var slug = value
-	      .toLowerCase()
-	      .trim()
-	      // remove html tags
-	      .replace(/<[!\/a-z].*?>/ig, '')
-	      // remove unwanted chars
-	      .replace(/[\u2000-\u206F\u2E00-\u2E7F\\'!"#$%&()*+,./:;<=>?@[\]^`{|}~]/g, '')
-	      .replace(/\s/g, '-');
-
-	    if (this.seen.hasOwnProperty(slug)) {
-	      var originalSlug = slug;
-	      do {
-	        this.seen[originalSlug]++;
-	        slug = originalSlug + '-' + this.seen[originalSlug];
-	      } while (this.seen.hasOwnProperty(slug));
+	        if (index === -1) {
+	          consumer.rings.push(ring);
+	          consumer.windings.push(winding);
+	        } else consumer.windings[index] += winding;
+	      }
+
+	      consumee.rings = null;
+	      consumee.windings = null;
+	      consumee.consumedBy = consumer; // mark sweep events consumed as to maintain ordering in sweep event queue
+
+	      consumee.leftSE.consumedBy = consumer.leftSE;
+	      consumee.rightSE.consumedBy = consumer.rightSE;
 	    }
-	    this.seen[slug] = 0;
+	    /* The first segment previous segment chain that is in the result */
 
-	    return slug;
-	  };
+	  }, {
+	    key: "prevInResult",
+	    value: function prevInResult() {
+	      if (this._prevInResult !== undefined) return this._prevInResult;
+	      if (!this.prev) this._prevInResult = null;else if (this.prev.isInResult()) this._prevInResult = this.prev;else this._prevInResult = this.prev.prevInResult();
+	      return this._prevInResult;
+	    }
+	  }, {
+	    key: "beforeState",
+	    value: function beforeState() {
+	      if (this._beforeState !== undefined) return this._beforeState;
+	      if (!this.prev) this._beforeState = {
+	        rings: [],
+	        windings: [],
+	        multiPolys: []
+	      };else {
+	        var seg = this.prev.consumedBy || this.prev;
+	        this._beforeState = seg.afterState();
+	      }
+	      return this._beforeState;
+	    }
+	  }, {
+	    key: "afterState",
+	    value: function afterState() {
+	      if (this._afterState !== undefined) return this._afterState;
+	      var beforeState = this.beforeState();
+	      this._afterState = {
+	        rings: beforeState.rings.slice(0),
+	        windings: beforeState.windings.slice(0),
+	        multiPolys: []
+	      };
+	      var ringsAfter = this._afterState.rings;
+	      var windingsAfter = this._afterState.windings;
+	      var mpsAfter = this._afterState.multiPolys; // calculate ringsAfter, windingsAfter
 
-	  return Slugger;
-	}());
+	      for (var i = 0, iMax = this.rings.length; i < iMax; i++) {
+	        var ring = this.rings[i];
+	        var winding = this.windings[i];
+	        var index = ringsAfter.indexOf(ring);
 
-	var defaults$4 = defaults.defaults;
-	var unescape$2 = helpers.unescape;
+	        if (index === -1) {
+	          ringsAfter.push(ring);
+	          windingsAfter.push(winding);
+	        } else windingsAfter[index] += winding;
+	      } // calcualte polysAfter
 
-	/**
-	 * Parsing & Compiling
-	 */
-	var Parser_1 = /*@__PURE__*/(function () {
-	  function Parser(options) {
-	    this.options = options || defaults$4;
-	    this.options.renderer = this.options.renderer || new Renderer_1();
-	    this.renderer = this.options.renderer;
-	    this.renderer.options = this.options;
-	    this.textRenderer = new TextRenderer_1();
-	    this.slugger = new Slugger_1();
-	  }
 
-	  /**
-	   * Static Parse Method
-	   */
-	  Parser.parse = function parse (tokens, options) {
-	    var parser = new Parser(options);
-	    return parser.parse(tokens);
-	  };
+	      var polysAfter = [];
+	      var polysExclude = [];
 
-	  /**
-	   * Parse Loop
-	   */
-	  Parser.prototype.parse = function parse (tokens, top) {
-	    if ( top === void 0 ) top = true;
+	      for (var _i = 0, _iMax = ringsAfter.length; _i < _iMax; _i++) {
+	        if (windingsAfter[_i] === 0) continue; // non-zero rule
 
-	    var out = '',
-	      i,
-	      j,
-	      k,
-	      l2,
-	      l3,
-	      row,
-	      cell,
-	      header,
-	      body,
-	      token,
-	      ordered,
-	      start,
-	      loose,
-	      itemBody,
-	      item,
-	      checked,
-	      task,
-	      checkbox;
-
-	    var l = tokens.length;
-	    for (i = 0; i < l; i++) {
-	      token = tokens[i];
-	      switch (token.type) {
-	        case 'space': {
-	          continue;
-	        }
-	        case 'hr': {
-	          out += this.renderer.hr();
-	          continue;
-	        }
-	        case 'heading': {
-	          out += this.renderer.heading(
-	            this.parseInline(token.tokens),
-	            token.depth,
-	            unescape$2(this.parseInline(token.tokens, this.textRenderer)),
-	            this.slugger);
-	          continue;
-	        }
-	        case 'code': {
-	          out += this.renderer.code(token.text,
-	            token.lang,
-	            token.escaped);
-	          continue;
-	        }
-	        case 'table': {
-	          header = '';
-
-	          // header
-	          cell = '';
-	          l2 = token.header.length;
-	          for (j = 0; j < l2; j++) {
-	            cell += this.renderer.tablecell(
-	              this.parseInline(token.tokens.header[j]),
-	              { header: true, align: token.align[j] }
-	            );
-	          }
-	          header += this.renderer.tablerow(cell);
-
-	          body = '';
-	          l2 = token.cells.length;
-	          for (j = 0; j < l2; j++) {
-	            row = token.tokens.cells[j];
-
-	            cell = '';
-	            l3 = row.length;
-	            for (k = 0; k < l3; k++) {
-	              cell += this.renderer.tablecell(
-	                this.parseInline(row[k]),
-	                { header: false, align: token.align[k] }
-	              );
-	            }
+	        var _ring = ringsAfter[_i];
+	        var poly = _ring.poly;
+	        if (polysExclude.indexOf(poly) !== -1) continue;
+	        if (_ring.isExterior) polysAfter.push(poly);else {
+	          if (polysExclude.indexOf(poly) === -1) polysExclude.push(poly);
 
-	            body += this.renderer.tablerow(cell);
-	          }
-	          out += this.renderer.table(header, body);
-	          continue;
-	        }
-	        case 'blockquote': {
-	          body = this.parse(token.tokens);
-	          out += this.renderer.blockquote(body);
-	          continue;
+	          var _index = polysAfter.indexOf(_ring.poly);
+
+	          if (_index !== -1) polysAfter.splice(_index, 1);
 	        }
-	        case 'list': {
-	          ordered = token.ordered;
-	          start = token.start;
-	          loose = token.loose;
-	          l2 = token.items.length;
-
-	          body = '';
-	          for (j = 0; j < l2; j++) {
-	            item = token.items[j];
-	            checked = item.checked;
-	            task = item.task;
-
-	            itemBody = '';
-	            if (item.task) {
-	              checkbox = this.renderer.checkbox(checked);
-	              if (loose) {
-	                if (item.tokens[0].type === 'text') {
-	                  item.tokens[0].text = checkbox + ' ' + item.tokens[0].text;
-	                  if (item.tokens[0].tokens && item.tokens[0].tokens.length > 0 && item.tokens[0].tokens[0].type === 'text') {
-	                    item.tokens[0].tokens[0].text = checkbox + ' ' + item.tokens[0].tokens[0].text;
-	                  }
-	                } else {
-	                  item.tokens.unshift({
-	                    type: 'text',
-	                    text: checkbox
-	                  });
-	                }
-	              } else {
-	                itemBody += checkbox;
-	              }
-	            }
+	      } // calculate multiPolysAfter
 
-	            itemBody += this.parse(item.tokens, loose);
-	            body += this.renderer.listitem(itemBody, task, checked);
-	          }
 
-	          out += this.renderer.list(body, ordered, start);
-	          continue;
-	        }
-	        case 'html': {
-	          // TODO parse inline content if parameter markdown=1
-	          out += this.renderer.html(token.text);
-	          continue;
-	        }
-	        case 'paragraph': {
-	          out += this.renderer.paragraph(this.parseInline(token.tokens));
-	          continue;
-	        }
-	        case 'text': {
-	          body = token.tokens ? this.parseInline(token.tokens) : token.text;
-	          while (i + 1 < l && tokens[i + 1].type === 'text') {
-	            token = tokens[++i];
-	            body += '\n' + (token.tokens ? this.parseInline(token.tokens) : token.text);
-	          }
-	          out += top ? this.renderer.paragraph(body) : body;
-	          continue;
-	        }
-	        default: {
-	          var errMsg = 'Token with "' + token.type + '" type was not found.';
-	          if (this.options.silent) {
-	            console.error(errMsg);
-	            return;
-	          } else {
-	            throw new Error(errMsg);
-	          }
-	        }
+	      for (var _i2 = 0, _iMax2 = polysAfter.length; _i2 < _iMax2; _i2++) {
+	        var mp = polysAfter[_i2].multiPoly;
+	        if (mpsAfter.indexOf(mp) === -1) mpsAfter.push(mp);
 	      }
-	    }
-
-	    return out;
-	  };
 
-	  /**
-	   * Parse Inline Tokens
-	   */
-	  Parser.prototype.parseInline = function parseInline (tokens, renderer) {
-	    renderer = renderer || this.renderer;
-	    var out = '',
-	      i,
-	      token;
+	      return this._afterState;
+	    }
+	    /* Is this segment part of the final result? */
 
-	    var l = tokens.length;
-	    for (i = 0; i < l; i++) {
-	      token = tokens[i];
-	      switch (token.type) {
-	        case 'escape': {
-	          out += renderer.text(token.text);
-	          break;
-	        }
-	        case 'html': {
-	          out += renderer.html(token.text);
-	          break;
-	        }
-	        case 'link': {
-	          out += renderer.link(token.href, token.title, this.parseInline(token.tokens, renderer));
-	          break;
-	        }
-	        case 'image': {
-	          out += renderer.image(token.href, token.title, token.text);
-	          break;
-	        }
-	        case 'strong': {
-	          out += renderer.strong(this.parseInline(token.tokens, renderer));
-	          break;
-	        }
-	        case 'em': {
-	          out += renderer.em(this.parseInline(token.tokens, renderer));
-	          break;
-	        }
-	        case 'codespan': {
-	          out += renderer.codespan(token.text);
-	          break;
-	        }
-	        case 'br': {
-	          out += renderer.br();
-	          break;
-	        }
-	        case 'del': {
-	          out += renderer.del(this.parseInline(token.tokens, renderer));
-	          break;
-	        }
-	        case 'text': {
-	          out += renderer.text(token.text);
-	          break;
-	        }
-	        default: {
-	          var errMsg = 'Token with "' + token.type + '" type was not found.';
-	          if (this.options.silent) {
-	            console.error(errMsg);
-	            return;
-	          } else {
-	            throw new Error(errMsg);
+	  }, {
+	    key: "isInResult",
+	    value: function isInResult() {
+	      // if we've been consumed, we're not in the result
+	      if (this.consumedBy) return false;
+	      if (this._isInResult !== undefined) return this._isInResult;
+	      var mpsBefore = this.beforeState().multiPolys;
+	      var mpsAfter = this.afterState().multiPolys;
+
+	      switch (operation.type) {
+	        case 'union':
+	          {
+	            // UNION - included iff:
+	            //  * On one side of us there is 0 poly interiors AND
+	            //  * On the other side there is 1 or more.
+	            var noBefores = mpsBefore.length === 0;
+	            var noAfters = mpsAfter.length === 0;
+	            this._isInResult = noBefores !== noAfters;
+	            break;
 	          }
-	        }
+
+	        case 'intersection':
+	          {
+	            // INTERSECTION - included iff:
+	            //  * on one side of us all multipolys are rep. with poly interiors AND
+	            //  * on the other side of us, not all multipolys are repsented
+	            //    with poly interiors
+	            var least;
+	            var most;
+
+	            if (mpsBefore.length < mpsAfter.length) {
+	              least = mpsBefore.length;
+	              most = mpsAfter.length;
+	            } else {
+	              least = mpsAfter.length;
+	              most = mpsBefore.length;
+	            }
+
+	            this._isInResult = most === operation.numMultiPolys && least < most;
+	            break;
+	          }
+
+	        case 'xor':
+	          {
+	            // XOR - included iff:
+	            //  * the difference between the number of multipolys represented
+	            //    with poly interiors on our two sides is an odd number
+	            var diff = Math.abs(mpsBefore.length - mpsAfter.length);
+	            this._isInResult = diff % 2 === 1;
+	            break;
+	          }
+
+	        case 'difference':
+	          {
+	            // DIFFERENCE included iff:
+	            //  * on exactly one side, we have just the subject
+	            var isJustSubject = function isJustSubject(mps) {
+	              return mps.length === 1 && mps[0].isSubject;
+	            };
+
+	            this._isInResult = isJustSubject(mpsBefore) !== isJustSubject(mpsAfter);
+	            break;
+	          }
+
+	        default:
+	          throw new Error("Unrecognized operation type found ".concat(operation.type));
 	      }
+
+	      return this._isInResult;
 	    }
-	    return out;
-	  };
+	  }], [{
+	    key: "fromRing",
+	    value: function fromRing(pt1, pt2, ring) {
+	      var leftPt, rightPt, winding; // ordering the two points according to sweep line ordering
 
-	  return Parser;
-	}());
+	      var cmpPts = SweepEvent.comparePoints(pt1, pt2);
 
-	var merge$3 = helpers.merge;
-	var checkSanitizeDeprecation$1 = helpers.checkSanitizeDeprecation;
-	var escape$4 = helpers.escape;
-	var getDefaults = defaults.getDefaults;
-	var changeDefaults = defaults.changeDefaults;
-	var defaults$5 = defaults.defaults;
+	      if (cmpPts < 0) {
+	        leftPt = pt1;
+	        rightPt = pt2;
+	        winding = 1;
+	      } else if (cmpPts > 0) {
+	        leftPt = pt2;
+	        rightPt = pt1;
+	        winding = -1;
+	      } else throw new Error("Tried to create degenerate segment at [".concat(pt1.x, ", ").concat(pt1.y, "]"));
 
-	/**
-	 * Marked
-	 */
-	function marked(src, opt, callback) {
-	  // throw error in case of non string input
-	  if (typeof src === 'undefined' || src === null) {
-	    throw new Error('marked(): input parameter is undefined or null');
-	  }
-	  if (typeof src !== 'string') {
-	    throw new Error('marked(): input parameter is of type '
-	      + Object.prototype.toString.call(src) + ', string expected');
-	  }
+	      var leftSE = new SweepEvent(leftPt, true);
+	      var rightSE = new SweepEvent(rightPt, false);
+	      return new Segment(leftSE, rightSE, [ring], [winding]);
+	    }
+	  }]);
+
+	  return Segment;
+	}();
+
+	var RingIn = /*#__PURE__*/function () {
+	  function RingIn(geomRing, poly, isExterior) {
+	    _classCallCheck(this, RingIn);
 
-	  if (callback || typeof opt === 'function') {
-	    if (!callback) {
-	      callback = opt;
-	      opt = null;
+	    if (!Array.isArray(geomRing) || geomRing.length === 0) {
+	      throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
 	    }
 
-	    opt = merge$3({}, marked.defaults, opt || {});
-	    checkSanitizeDeprecation$1(opt);
-	    var highlight = opt.highlight;
-	    var tokens,
-	      pending,
-	      i = 0;
+	    this.poly = poly;
+	    this.isExterior = isExterior;
+	    this.segments = [];
 
-	    try {
-	      tokens = Lexer_1.lex(src, opt);
-	    } catch (e) {
-	      return callback(e);
+	    if (typeof geomRing[0][0] !== 'number' || typeof geomRing[0][1] !== 'number') {
+	      throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
 	    }
 
-	    pending = tokens.length;
+	    var firstPoint = rounder.round(geomRing[0][0], geomRing[0][1]);
+	    this.bbox = {
+	      ll: {
+	        x: firstPoint.x,
+	        y: firstPoint.y
+	      },
+	      ur: {
+	        x: firstPoint.x,
+	        y: firstPoint.y
+	      }
+	    };
+	    var prevPoint = firstPoint;
 
-	    var done = function(err) {
-	      if (err) {
-	        opt.highlight = highlight;
-	        return callback(err);
+	    for (var i = 1, iMax = geomRing.length; i < iMax; i++) {
+	      if (typeof geomRing[i][0] !== 'number' || typeof geomRing[i][1] !== 'number') {
+	        throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
 	      }
 
-	      var out;
+	      var point = rounder.round(geomRing[i][0], geomRing[i][1]); // skip repeated points
 
-	      try {
-	        out = Parser_1.parse(tokens, opt);
-	      } catch (e) {
-	        err = e;
+	      if (point.x === prevPoint.x && point.y === prevPoint.y) continue;
+	      this.segments.push(Segment.fromRing(prevPoint, point, this));
+	      if (point.x < this.bbox.ll.x) this.bbox.ll.x = point.x;
+	      if (point.y < this.bbox.ll.y) this.bbox.ll.y = point.y;
+	      if (point.x > this.bbox.ur.x) this.bbox.ur.x = point.x;
+	      if (point.y > this.bbox.ur.y) this.bbox.ur.y = point.y;
+	      prevPoint = point;
+	    } // add segment from last to first if last is not the same as first
+
+
+	    if (firstPoint.x !== prevPoint.x || firstPoint.y !== prevPoint.y) {
+	      this.segments.push(Segment.fromRing(prevPoint, firstPoint, this));
+	    }
+	  }
+
+	  _createClass(RingIn, [{
+	    key: "getSweepEvents",
+	    value: function getSweepEvents() {
+	      var sweepEvents = [];
+
+	      for (var i = 0, iMax = this.segments.length; i < iMax; i++) {
+	        var segment = this.segments[i];
+	        sweepEvents.push(segment.leftSE);
+	        sweepEvents.push(segment.rightSE);
 	      }
 
-	      opt.highlight = highlight;
+	      return sweepEvents;
+	    }
+	  }]);
+
+	  return RingIn;
+	}();
+
+	var PolyIn = /*#__PURE__*/function () {
+	  function PolyIn(geomPoly, multiPoly) {
+	    _classCallCheck(this, PolyIn);
+
+	    if (!Array.isArray(geomPoly)) {
+	      throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+	    }
+
+	    this.exteriorRing = new RingIn(geomPoly[0], this, true); // copy by value
 
-	      return err
-	        ? callback(err)
-	        : callback(null, out);
+	    this.bbox = {
+	      ll: {
+	        x: this.exteriorRing.bbox.ll.x,
+	        y: this.exteriorRing.bbox.ll.y
+	      },
+	      ur: {
+	        x: this.exteriorRing.bbox.ur.x,
+	        y: this.exteriorRing.bbox.ur.y
+	      }
 	    };
+	    this.interiorRings = [];
 
-	    if (!highlight || highlight.length < 3) {
-	      return done();
+	    for (var i = 1, iMax = geomPoly.length; i < iMax; i++) {
+	      var ring = new RingIn(geomPoly[i], this, false);
+	      if (ring.bbox.ll.x < this.bbox.ll.x) this.bbox.ll.x = ring.bbox.ll.x;
+	      if (ring.bbox.ll.y < this.bbox.ll.y) this.bbox.ll.y = ring.bbox.ll.y;
+	      if (ring.bbox.ur.x > this.bbox.ur.x) this.bbox.ur.x = ring.bbox.ur.x;
+	      if (ring.bbox.ur.y > this.bbox.ur.y) this.bbox.ur.y = ring.bbox.ur.y;
+	      this.interiorRings.push(ring);
 	    }
 
-	    delete opt.highlight;
+	    this.multiPoly = multiPoly;
+	  }
 
-	    if (!pending) { return done(); }
+	  _createClass(PolyIn, [{
+	    key: "getSweepEvents",
+	    value: function getSweepEvents() {
+	      var sweepEvents = this.exteriorRing.getSweepEvents();
 
-	    for (; i < tokens.length; i++) {
-	      (function(token) {
-	        if (token.type !== 'code') {
-	          return --pending || done();
+	      for (var i = 0, iMax = this.interiorRings.length; i < iMax; i++) {
+	        var ringSweepEvents = this.interiorRings[i].getSweepEvents();
+
+	        for (var j = 0, jMax = ringSweepEvents.length; j < jMax; j++) {
+	          sweepEvents.push(ringSweepEvents[j]);
 	        }
-	        return highlight(token.text, token.lang, function(err, code) {
-	          if (err) { return done(err); }
-	          if (code == null || code === token.text) {
-	            return --pending || done();
-	          }
-	          token.text = code;
-	          token.escaped = true;
-	          --pending || done();
-	        });
-	      })(tokens[i]);
+	      }
+
+	      return sweepEvents;
 	    }
+	  }]);
 
-	    return;
-	  }
-	  try {
-	    opt = merge$3({}, marked.defaults, opt || {});
-	    checkSanitizeDeprecation$1(opt);
-	    return Parser_1.parse(Lexer_1.lex(src, opt), opt);
-	  } catch (e$1) {
-	    e$1.message += '\nPlease report this to https://github.com/markedjs/marked.';
-	    if ((opt || marked.defaults).silent) {
-	      return '<p>An error occurred:</p><pre>'
-	        + escape$4(e$1.message + '', true)
-	        + '</pre>';
+	  return PolyIn;
+	}();
+
+	var MultiPolyIn = /*#__PURE__*/function () {
+	  function MultiPolyIn(geom, isSubject) {
+	    _classCallCheck(this, MultiPolyIn);
+
+	    if (!Array.isArray(geom)) {
+	      throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+	    }
+
+	    try {
+	      // if the input looks like a polygon, convert it to a multipolygon
+	      if (typeof geom[0][0][0] === 'number') geom = [geom];
+	    } catch (ex) {// The input is either malformed or has empty arrays.
+	      // In either case, it will be handled later on.
+	    }
+
+	    this.polys = [];
+	    this.bbox = {
+	      ll: {
+	        x: Number.POSITIVE_INFINITY,
+	        y: Number.POSITIVE_INFINITY
+	      },
+	      ur: {
+	        x: Number.NEGATIVE_INFINITY,
+	        y: Number.NEGATIVE_INFINITY
+	      }
+	    };
+
+	    for (var i = 0, iMax = geom.length; i < iMax; i++) {
+	      var poly = new PolyIn(geom[i], this);
+	      if (poly.bbox.ll.x < this.bbox.ll.x) this.bbox.ll.x = poly.bbox.ll.x;
+	      if (poly.bbox.ll.y < this.bbox.ll.y) this.bbox.ll.y = poly.bbox.ll.y;
+	      if (poly.bbox.ur.x > this.bbox.ur.x) this.bbox.ur.x = poly.bbox.ur.x;
+	      if (poly.bbox.ur.y > this.bbox.ur.y) this.bbox.ur.y = poly.bbox.ur.y;
+	      this.polys.push(poly);
 	    }
-	    throw e$1;
+
+	    this.isSubject = isSubject;
 	  }
-	}
 
-	/**
-	 * Options
-	 */
+	  _createClass(MultiPolyIn, [{
+	    key: "getSweepEvents",
+	    value: function getSweepEvents() {
+	      var sweepEvents = [];
 
-	marked.options =
-	marked.setOptions = function(opt) {
-	  merge$3(marked.defaults, opt);
-	  changeDefaults(marked.defaults);
-	  return marked;
-	};
+	      for (var i = 0, iMax = this.polys.length; i < iMax; i++) {
+	        var polySweepEvents = this.polys[i].getSweepEvents();
 
-	marked.getDefaults = getDefaults;
+	        for (var j = 0, jMax = polySweepEvents.length; j < jMax; j++) {
+	          sweepEvents.push(polySweepEvents[j]);
+	        }
+	      }
 
-	marked.defaults = defaults$5;
+	      return sweepEvents;
+	    }
+	  }]);
 
-	/**
-	 * Use Extension
-	 */
+	  return MultiPolyIn;
+	}();
 
-	marked.use = function(extension) {
-	  var opts = merge$3({}, extension);
-	  if (extension.renderer) {
-	    var renderer = marked.defaults.renderer || new Renderer_1();
-	    var loop = function ( prop ) {
-	      var prevRenderer = renderer[prop];
-	      renderer[prop] = function () {
-	        var args = [], len = arguments.length;
-	        while ( len-- ) args[ len ] = arguments[ len ];
-
-	        var ret = extension.renderer[prop].apply(renderer, args);
-	        if (ret === false) {
-	          ret = prevRenderer.apply(renderer, args);
-	        }
-	        return ret;
-	      };
-	    };
+	var RingOut = /*#__PURE__*/function () {
+	  _createClass(RingOut, null, [{
+	    key: "factory",
 
-	    for (var prop in extension.renderer) loop( prop );
-	    opts.renderer = renderer;
-	  }
-	  if (extension.tokenizer) {
-	    var tokenizer = marked.defaults.tokenizer || new Tokenizer_1();
-	    var loop$1 = function ( prop ) {
-	      var prevTokenizer = tokenizer[prop$1];
-	      tokenizer[prop$1] = function () {
-	        var args = [], len = arguments.length;
-	        while ( len-- ) args[ len ] = arguments[ len ];
-
-	        var ret = extension.tokenizer[prop$1].apply(tokenizer, args);
-	        if (ret === false) {
-	          ret = prevTokenizer.apply(tokenizer, args);
-	        }
-	        return ret;
-	      };
-	    };
+	    /* Given the segments from the sweep line pass, compute & return a series
+	     * of closed rings from all the segments marked to be part of the result */
+	    value: function factory(allSegments) {
+	      var ringsOut = [];
 
-	    for (var prop$1 in extension.tokenizer) loop$1( prop );
-	    opts.tokenizer = tokenizer;
-	  }
-	  marked.setOptions(opts);
-	};
+	      for (var i = 0, iMax = allSegments.length; i < iMax; i++) {
+	        var segment = allSegments[i];
+	        if (!segment.isInResult() || segment.ringOut) continue;
+	        var prevEvent = null;
+	        var event = segment.leftSE;
+	        var nextEvent = segment.rightSE;
+	        var events = [event];
+	        var startingPoint = event.point;
+	        var intersectionLEs = [];
+	        /* Walk the chain of linked events to form a closed ring */
 
-	/**
-	 * Expose
-	 */
+	        while (true) {
+	          prevEvent = event;
+	          event = nextEvent;
+	          events.push(event);
+	          /* Is the ring complete? */
 
-	marked.Parser = Parser_1;
-	marked.parser = Parser_1.parse;
+	          if (event.point === startingPoint) break;
 
-	marked.Renderer = Renderer_1;
-	marked.TextRenderer = TextRenderer_1;
+	          while (true) {
+	            var availableLEs = event.getAvailableLinkedEvents();
+	            /* Did we hit a dead end? This shouldn't happen. Indicates some earlier
+	             * part of the algorithm malfunctioned... please file a bug report. */
 
-	marked.Lexer = Lexer_1;
-	marked.lexer = Lexer_1.lex;
+	            if (availableLEs.length === 0) {
+	              var firstPt = events[0].point;
+	              var lastPt = events[events.length - 1].point;
+	              throw new Error("Unable to complete output ring starting at [".concat(firstPt.x, ",") + " ".concat(firstPt.y, "]. Last matching segment found ends at") + " [".concat(lastPt.x, ", ").concat(lastPt.y, "]."));
+	            }
+	            /* Only one way to go, so cotinue on the path */
 
-	marked.Tokenizer = Tokenizer_1;
 
-	marked.Slugger = Slugger_1;
+	            if (availableLEs.length === 1) {
+	              nextEvent = availableLEs[0].otherSE;
+	              break;
+	            }
+	            /* We must have an intersection. Check for a completed loop */
 
-	marked.parse = marked;
 
-	var marked_1 = marked;
+	            var indexLE = null;
 
-	var tiler$2 = utilTiler();
-	var dispatch$3 = dispatch('loaded');
-	var _tileZoom$2 = 14;
-	var _osmoseUrlRoot = 'https://osmose.openstreetmap.fr/api/0.3';
-	var _osmoseData = { icons: {}, items: [] };
+	            for (var j = 0, jMax = intersectionLEs.length; j < jMax; j++) {
+	              if (intersectionLEs[j].point === event.point) {
+	                indexLE = j;
+	                break;
+	              }
+	            }
+	            /* Found a completed loop. Cut that off and make a ring */
 
-	// This gets reassigned if reset
-	var _cache$2;
 
-	function abortRequest$2(controller) {
-	  if (controller) {
-	    controller.abort();
-	  }
-	}
+	            if (indexLE !== null) {
+	              var intersectionLE = intersectionLEs.splice(indexLE)[0];
+	              var ringEvents = events.splice(intersectionLE.index);
+	              ringEvents.unshift(ringEvents[0].otherSE);
+	              ringsOut.push(new RingOut(ringEvents.reverse()));
+	              continue;
+	            }
+	            /* register the intersection */
 
-	function abortUnwantedRequests$2(cache, tiles) {
-	  Object.keys(cache.inflightTile).forEach(function (k) {
-	    var wanted = tiles.find(function (tile) { return k === tile.id; });
-	    if (!wanted) {
-	      abortRequest$2(cache.inflightTile[k]);
-	      delete cache.inflightTile[k];
+
+	            intersectionLEs.push({
+	              index: events.length,
+	              point: event.point
+	            });
+	            /* Choose the left-most option to continue the walk */
+
+	            var comparator = event.getLeftmostComparator(prevEvent);
+	            nextEvent = availableLEs.sort(comparator)[0].otherSE;
+	            break;
+	          }
+	        }
+
+	        ringsOut.push(new RingOut(events));
+	      }
+
+	      return ringsOut;
 	    }
-	  });
-	}
+	  }]);
 
-	function encodeIssueRtree$2(d) {
-	  return { minX: d.loc[0], minY: d.loc[1], maxX: d.loc[0], maxY: d.loc[1], data: d };
-	}
+	  function RingOut(events) {
+	    _classCallCheck(this, RingOut);
 
-	// Replace or remove QAItem from rtree
-	function updateRtree$2(item, replace) {
-	  _cache$2.rtree.remove(item, function (a, b) { return a.data.id === b.data.id; });
+	    this.events = events;
 
-	  if (replace) {
-	    _cache$2.rtree.insert(item);
+	    for (var i = 0, iMax = events.length; i < iMax; i++) {
+	      events[i].segment.ringOut = this;
+	    }
+
+	    this.poly = null;
 	  }
-	}
 
-	// Issues shouldn't obscure each other
-	function preventCoincident$1(loc) {
-	  var coincident = false;
-	  do {
-	    // first time, move marker up. after that, move marker right.
-	    var delta = coincident ? [0.00001, 0] : [0, 0.00001];
-	    loc = geoVecAdd(loc, delta);
-	    var bbox = geoExtent(loc).bbox();
-	    coincident = _cache$2.rtree.search(bbox).length;
-	  } while (coincident);
+	  _createClass(RingOut, [{
+	    key: "getGeom",
+	    value: function getGeom() {
+	      // Remove superfluous points (ie extra points along a straight line),
+	      var prevPt = this.events[0].point;
+	      var points = [prevPt];
 
-	  return loc;
-	}
+	      for (var i = 1, iMax = this.events.length - 1; i < iMax; i++) {
+	        var _pt = this.events[i].point;
+	        var _nextPt = this.events[i + 1].point;
+	        if (compareVectorAngles(_pt, prevPt, _nextPt) === 0) continue;
+	        points.push(_pt);
+	        prevPt = _pt;
+	      } // ring was all (within rounding error of angle calc) colinear points
 
-	var serviceOsmose = {
-	  title: 'osmose',
 
-	  init: function init() {
-	    _mainFileFetcher.get('qa_data')
-	      .then(function (d) {
-	        _osmoseData = d.osmose;
-	        _osmoseData.items = Object.keys(d.osmose.icons)
-	          .map(function (s) { return s.split('-')[0]; })
-	          .reduce(function (unique, item) { return unique.indexOf(item) !== -1 ? unique : unique.concat( [item]); }, []);
-	      });
+	      if (points.length === 1) return null; // check if the starting point is necessary
 
-	    if (!_cache$2) {
-	      this.reset();
+	      var pt = points[0];
+	      var nextPt = points[1];
+	      if (compareVectorAngles(pt, prevPt, nextPt) === 0) points.shift();
+	      points.push(points[0]);
+	      var step = this.isExteriorRing() ? 1 : -1;
+	      var iStart = this.isExteriorRing() ? 0 : points.length - 1;
+	      var iEnd = this.isExteriorRing() ? points.length : -1;
+	      var orderedPoints = [];
+
+	      for (var _i = iStart; _i != iEnd; _i += step) {
+	        orderedPoints.push([points[_i].x, points[_i].y]);
+	      }
+
+	      return orderedPoints;
 	    }
+	  }, {
+	    key: "isExteriorRing",
+	    value: function isExteriorRing() {
+	      if (this._isExteriorRing === undefined) {
+	        var enclosing = this.enclosingRing();
+	        this._isExteriorRing = enclosing ? !enclosing.isExteriorRing() : true;
+	      }
 
-	    this.event = utilRebind(this, dispatch$3, 'on');
-	  },
+	      return this._isExteriorRing;
+	    }
+	  }, {
+	    key: "enclosingRing",
+	    value: function enclosingRing() {
+	      if (this._enclosingRing === undefined) {
+	        this._enclosingRing = this._calcEnclosingRing();
+	      }
 
-	  reset: function reset() {
-	    var _strings = {};
-	    var _colors = {};
-	    if (_cache$2) {
-	      Object.values(_cache$2.inflightTile).forEach(abortRequest$2);
-	      // Strings and colors are static and should not be re-populated
-	      _strings = _cache$2.strings;
-	      _colors = _cache$2.colors;
+	      return this._enclosingRing;
 	    }
-	    _cache$2 = {
-	      data: {},
-	      loadedTile: {},
-	      inflightTile: {},
-	      inflightPost: {},
-	      closed: {},
-	      rtree: new RBush(),
-	      strings: _strings,
-	      colors: _colors
-	    };
-	  },
+	    /* Returns the ring that encloses this one, if any */
 
-	  loadIssues: function loadIssues(projection) {
-	    var this$1 = this;
+	  }, {
+	    key: "_calcEnclosingRing",
+	    value: function _calcEnclosingRing() {
+	      // start with the ealier sweep line event so that the prevSeg
+	      // chain doesn't lead us inside of a loop of ours
+	      var leftMostEvt = this.events[0];
+
+	      for (var i = 1, iMax = this.events.length; i < iMax; i++) {
+	        var evt = this.events[i];
+	        if (SweepEvent.compare(leftMostEvt, evt) > 0) leftMostEvt = evt;
+	      }
 
-	    var params = {
-	      // Tiles return a maximum # of issues
-	      // So we want to filter our request for only types iD supports
-	      item: _osmoseData.items
-	    };
+	      var prevSeg = leftMostEvt.segment.prevInResult();
+	      var prevPrevSeg = prevSeg ? prevSeg.prevInResult() : null;
 
-	    // determine the needed tiles to cover the view
-	    var tiles = tiler$2
-	      .zoomExtent([_tileZoom$2, _tileZoom$2])
-	      .getTiles(projection);
+	      while (true) {
+	        // no segment found, thus no ring can enclose us
+	        if (!prevSeg) return null; // no segments below prev segment found, thus the ring of the prev
+	        // segment must loop back around and enclose us
 
-	    // abort inflight requests that are no longer needed
-	    abortUnwantedRequests$2(_cache$2, tiles);
+	        if (!prevPrevSeg) return prevSeg.ringOut; // if the two segments are of different rings, the ring of the prev
+	        // segment must either loop around us or the ring of the prev prev
+	        // seg, which would make us and the ring of the prev peers
 
-	    // issue new requests..
-	    tiles.forEach(function (tile) {
-	      if (_cache$2.loadedTile[tile.id] || _cache$2.inflightTile[tile.id]) { return; }
+	        if (prevPrevSeg.ringOut !== prevSeg.ringOut) {
+	          if (prevPrevSeg.ringOut.enclosingRing() !== prevSeg.ringOut) {
+	            return prevSeg.ringOut;
+	          } else return prevSeg.ringOut.enclosingRing();
+	        } // two segments are from the same ring, so this was a penisula
+	        // of that ring. iterate downward, keep searching
 
-	      var ref = tile.xyz;
-	      var x = ref[0];
-	      var y = ref[1];
-	      var z = ref[2];
-	      var url = _osmoseUrlRoot + "/issues/" + z + "/" + x + "/" + y + ".json?" + utilQsString(params);
 
-	      var controller = new AbortController();
-	      _cache$2.inflightTile[tile.id] = controller;
+	        prevSeg = prevPrevSeg.prevInResult();
+	        prevPrevSeg = prevSeg ? prevSeg.prevInResult() : null;
+	      }
+	    }
+	  }]);
 
-	      d3_json(url, { signal: controller.signal })
-	        .then(function (data) {
-	          delete _cache$2.inflightTile[tile.id];
-	          _cache$2.loadedTile[tile.id] = true;
-
-	          if (data.features) {
-	            data.features.forEach(function (issue) {
-	              var ref = issue.properties;
-	              var item = ref.item;
-	              var cl = ref.class;
-	              var id = ref.uuid;
-	              /* Osmose issues are uniquely identified by a unique
-	                `item` and `class` combination (both integer values) */
-	              var itemType = item + "-" + cl;
-
-	              // Filter out unsupported issue types (some are too specific or advanced)
-	              if (itemType in _osmoseData.icons) {
-	                var loc = issue.geometry.coordinates; // lon, lat
-	                loc = preventCoincident$1(loc);
-
-	                var d = new QAItem(loc, this$1, itemType, id, { item: item });
-
-	                // Setting elems here prevents UI detail requests
-	                if (item === 8300 || item === 8360) {
-	                  d.elems = [];
-	                }
+	  return RingOut;
+	}();
 
-	                _cache$2.data[d.id] = d;
-	                _cache$2.rtree.insert(encodeIssueRtree$2(d));
-	              }
-	            });
-	          }
+	var PolyOut = /*#__PURE__*/function () {
+	  function PolyOut(exteriorRing) {
+	    _classCallCheck(this, PolyOut);
 
-	          dispatch$3.call('loaded');
-	        })
-	        .catch(function () {
-	          delete _cache$2.inflightTile[tile.id];
-	          _cache$2.loadedTile[tile.id] = true;
-	        });
-	    });
-	  },
+	    this.exteriorRing = exteriorRing;
+	    exteriorRing.poly = this;
+	    this.interiorRings = [];
+	  }
 
-	  loadIssueDetail: function loadIssueDetail(issue) {
-	    var this$1 = this;
+	  _createClass(PolyOut, [{
+	    key: "addInterior",
+	    value: function addInterior(ring) {
+	      this.interiorRings.push(ring);
+	      ring.poly = this;
+	    }
+	  }, {
+	    key: "getGeom",
+	    value: function getGeom() {
+	      var geom = [this.exteriorRing.getGeom()]; // exterior ring was all (within rounding error of angle calc) colinear points
 
-	    // Issue details only need to be fetched once
-	    if (issue.elems !== undefined) {
-	      return Promise.resolve(issue);
+	      if (geom[0] === null) return null;
+
+	      for (var i = 0, iMax = this.interiorRings.length; i < iMax; i++) {
+	        var ringGeom = this.interiorRings[i].getGeom(); // interior ring was all (within rounding error of angle calc) colinear points
+
+	        if (ringGeom === null) continue;
+	        geom.push(ringGeom);
+	      }
+
+	      return geom;
 	    }
+	  }]);
 
-	    var url = _osmoseUrlRoot + "/issue/" + (issue.id) + "?langs=" + (_mainLocalizer.localeCode());
-	    var cacheDetails = function (data) {
-	      // Associated elements used for highlighting
-	      // Assign directly for immediate use in the callback
-	      issue.elems = data.elems.map(function (e) { return e.type.substring(0,1) + e.id; });
+	  return PolyOut;
+	}();
 
-	      // Some issues have instance specific detail in a subtitle
-	      issue.detail = data.subtitle ? marked_1(data.subtitle.auto) : '';
+	var MultiPolyOut = /*#__PURE__*/function () {
+	  function MultiPolyOut(rings) {
+	    _classCallCheck(this, MultiPolyOut);
 
-	      this$1.replaceItem(issue);
-	    };
+	    this.rings = rings;
+	    this.polys = this._composePolys(rings);
+	  }
 
-	    return d3_json(url).then(cacheDetails).then(function () { return issue; });
-	  },
+	  _createClass(MultiPolyOut, [{
+	    key: "getGeom",
+	    value: function getGeom() {
+	      var geom = [];
 
-	  loadStrings: function loadStrings(locale) {
-	    if ( locale === void 0 ) locale=_mainLocalizer.localeCode();
+	      for (var i = 0, iMax = this.polys.length; i < iMax; i++) {
+	        var polyGeom = this.polys[i].getGeom(); // exterior ring was all (within rounding error of angle calc) colinear points
 
-	    var items = Object.keys(_osmoseData.icons);
+	        if (polyGeom === null) continue;
+	        geom.push(polyGeom);
+	      }
 
-	    if (
-	      locale in _cache$2.strings
-	      && Object.keys(_cache$2.strings[locale]).length === items.length
-	    ) {
-	        return Promise.resolve(_cache$2.strings[locale]);
+	      return geom;
 	    }
+	  }, {
+	    key: "_composePolys",
+	    value: function _composePolys(rings) {
+	      var polys = [];
+
+	      for (var i = 0, iMax = rings.length; i < iMax; i++) {
+	        var ring = rings[i];
+	        if (ring.poly) continue;
+	        if (ring.isExteriorRing()) polys.push(new PolyOut(ring));else {
+	          var enclosingRing = ring.enclosingRing();
+	          if (!enclosingRing.poly) polys.push(new PolyOut(enclosingRing));
+	          enclosingRing.poly.addInterior(ring);
+	        }
+	      }
 
-	    // May be partially populated already if some requests were successful
-	    if (!(locale in _cache$2.strings)) {
-	      _cache$2.strings[locale] = {};
+	      return polys;
 	    }
+	  }]);
 
-	    // Only need to cache strings for supported issue types
-	    // Using multiple individual item + class requests to reduce fetched data size
-	    var allRequests = items.map(function (itemType) {
-	      // No need to request data we already have
-	      if (itemType in _cache$2.strings[locale]) { return; }
+	  return MultiPolyOut;
+	}();
+	/**
+	 * NOTE:  We must be careful not to change any segments while
+	 *        they are in the SplayTree. AFAIK, there's no way to tell
+	 *        the tree to rebalance itself - thus before splitting
+	 *        a segment that's in the tree, we remove it from the tree,
+	 *        do the split, then re-insert it. (Even though splitting a
+	 *        segment *shouldn't* change its correct position in the
+	 *        sweep line tree, the reality is because of rounding errors,
+	 *        it sometimes does.)
+	 */
 
-	      var cacheData = function (data) {
-	        // Bunch of nested single value arrays of objects
-	        var ref = data.categories;
-	        var cat = ref[0]; if ( cat === void 0 ) cat = {items:[]};
-	        var ref$1 = cat.items;
-	        var item = ref$1[0]; if ( item === void 0 ) item = {class:[]};
-	        var ref$2 = item.class;
-	        var cl = ref$2[0]; if ( cl === void 0 ) cl = null;
-
-	        // If null default value is reached, data wasn't as expected (or was empty)
-	        if (!cl) {
-	          /* eslint-disable no-console */
-	          console.log(("Osmose strings request (" + itemType + ") had unexpected data"));
-	          /* eslint-enable no-console */
-	          return;
-	        }
 
-	        // Cache served item colors to automatically style issue markers later
-	        var itemInt = item.item;
-	        var color = item.color;
-	        if (/^#[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3}/.test(color)) {
-	          _cache$2.colors[itemInt] = color;
-	        }
+	var SweepLine = /*#__PURE__*/function () {
+	  function SweepLine(queue) {
+	    var comparator = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : Segment.compare;
 
-	        // Value of root key will be null if no string exists
-	        // If string exists, value is an object with key 'auto' for string
-	        var title = cl.title;
-	        var detail = cl.detail;
-	        var fix = cl.fix;
-	        var trap = cl.trap;
+	    _classCallCheck(this, SweepLine);
 
-	        // Osmose titles shouldn't contain markdown
-	        var issueStrings = {};
-	        if (title) { issueStrings.title = title.auto; }
-	        if (detail) { issueStrings.detail = marked_1(detail.auto); }
-	        if (trap) { issueStrings.trap = marked_1(trap.auto); }
-	        if (fix) { issueStrings.fix = marked_1(fix.auto); }
+	    this.queue = queue;
+	    this.tree = new Tree(comparator);
+	    this.segments = [];
+	  }
 
-	        _cache$2.strings[locale][itemType] = issueStrings;
-	      };
+	  _createClass(SweepLine, [{
+	    key: "process",
+	    value: function process(event) {
+	      var segment = event.segment;
+	      var newEvents = []; // if we've already been consumed by another segment,
+	      // clean up our body parts and get out
 
-	      var ref = itemType.split('-');
-	      var item = ref[0];
-	      var cl = ref[1];
+	      if (event.consumedBy) {
+	        if (event.isLeft) this.queue.remove(event.otherSE);else this.tree.remove(segment);
+	        return newEvents;
+	      }
 
-	      // Osmose API falls back to English strings where untranslated or if locale doesn't exist
-	      var url = _osmoseUrlRoot + "/items/" + item + "/class/" + cl + "?langs=" + locale;
+	      var node = event.isLeft ? this.tree.insert(segment) : this.tree.find(segment);
+	      if (!node) throw new Error("Unable to find segment #".concat(segment.id, " ") + "[".concat(segment.leftSE.point.x, ", ").concat(segment.leftSE.point.y, "] -> ") + "[".concat(segment.rightSE.point.x, ", ").concat(segment.rightSE.point.y, "] ") + 'in SweepLine tree. Please submit a bug report.');
+	      var prevNode = node;
+	      var nextNode = node;
+	      var prevSeg = undefined;
+	      var nextSeg = undefined; // skip consumed segments still in tree
 
-	      return d3_json(url).then(cacheData);
-	    });
+	      while (prevSeg === undefined) {
+	        prevNode = this.tree.prev(prevNode);
+	        if (prevNode === null) prevSeg = null;else if (prevNode.key.consumedBy === undefined) prevSeg = prevNode.key;
+	      } // skip consumed segments still in tree
 
-	    return Promise.all(allRequests).then(function () { return _cache$2.strings[locale]; });
-	  },
 
-	  getStrings: function getStrings(itemType, locale) {
-	    if ( locale === void 0 ) locale=_mainLocalizer.localeCode();
+	      while (nextSeg === undefined) {
+	        nextNode = this.tree.next(nextNode);
+	        if (nextNode === null) nextSeg = null;else if (nextNode.key.consumedBy === undefined) nextSeg = nextNode.key;
+	      }
 
-	    // No need to fallback to English, Osmose API handles this for us
-	    return (locale in _cache$2.strings) ? _cache$2.strings[locale][itemType] : {};
-	  },
+	      if (event.isLeft) {
+	        // Check for intersections against the previous segment in the sweep line
+	        var prevMySplitter = null;
 
-	  getColor: function getColor(itemType) {
-	    return (itemType in _cache$2.colors) ? _cache$2.colors[itemType] : '#FFFFFF';
-	  },
+	        if (prevSeg) {
+	          var prevInter = prevSeg.getIntersection(segment);
 
-	  postUpdate: function postUpdate(issue, callback) {
-	    var this$1 = this;
+	          if (prevInter !== null) {
+	            if (!segment.isAnEndpoint(prevInter)) prevMySplitter = prevInter;
 
-	    if (_cache$2.inflightPost[issue.id]) {
-	      return callback({ message: 'Issue update already inflight', status: -2 }, issue);
-	    }
+	            if (!prevSeg.isAnEndpoint(prevInter)) {
+	              var newEventsFromSplit = this._splitSafely(prevSeg, prevInter);
 
-	    // UI sets the status to either 'done' or 'false'
-	    var url = _osmoseUrlRoot + "/issue/" + (issue.id) + "/" + (issue.newStatus);
-	    var controller = new AbortController();
-	    var after = function () {
-	      delete _cache$2.inflightPost[issue.id];
+	              for (var i = 0, iMax = newEventsFromSplit.length; i < iMax; i++) {
+	                newEvents.push(newEventsFromSplit[i]);
+	              }
+	            }
+	          }
+	        } // Check for intersections against the next segment in the sweep line
 
-	      this$1.removeItem(issue);
-	      if (issue.newStatus === 'done') {
-	        // Keep track of the number of issues closed per `item` to tag the changeset
-	        if (!(issue.item in _cache$2.closed)) {
-	          _cache$2.closed[issue.item] = 0;
+
+	        var nextMySplitter = null;
+
+	        if (nextSeg) {
+	          var nextInter = nextSeg.getIntersection(segment);
+
+	          if (nextInter !== null) {
+	            if (!segment.isAnEndpoint(nextInter)) nextMySplitter = nextInter;
+
+	            if (!nextSeg.isAnEndpoint(nextInter)) {
+	              var _newEventsFromSplit = this._splitSafely(nextSeg, nextInter);
+
+	              for (var _i = 0, _iMax = _newEventsFromSplit.length; _i < _iMax; _i++) {
+	                newEvents.push(_newEventsFromSplit[_i]);
+	              }
+	            }
+	          }
+	        } // For simplicity, even if we find more than one intersection we only
+	        // spilt on the 'earliest' (sweep-line style) of the intersections.
+	        // The other intersection will be handled in a future process().
+
+
+	        if (prevMySplitter !== null || nextMySplitter !== null) {
+	          var mySplitter = null;
+	          if (prevMySplitter === null) mySplitter = nextMySplitter;else if (nextMySplitter === null) mySplitter = prevMySplitter;else {
+	            var cmpSplitters = SweepEvent.comparePoints(prevMySplitter, nextMySplitter);
+	            mySplitter = cmpSplitters <= 0 ? prevMySplitter : nextMySplitter;
+	          } // Rounding errors can cause changes in ordering,
+	          // so remove afected segments and right sweep events before splitting
+
+	          this.queue.remove(segment.rightSE);
+	          newEvents.push(segment.rightSE);
+
+	          var _newEventsFromSplit2 = segment.split(mySplitter);
+
+	          for (var _i2 = 0, _iMax2 = _newEventsFromSplit2.length; _i2 < _iMax2; _i2++) {
+	            newEvents.push(_newEventsFromSplit2[_i2]);
+	          }
+	        }
+
+	        if (newEvents.length > 0) {
+	          // We found some intersections, so re-do the current event to
+	          // make sure sweep line ordering is totally consistent for later
+	          // use with the segment 'prev' pointers
+	          this.tree.remove(segment);
+	          newEvents.push(event);
+	        } else {
+	          // done with left event
+	          this.segments.push(segment);
+	          segment.prev = prevSeg;
+	        }
+	      } else {
+	        // event.isRight
+	        // since we're about to be removed from the sweep line, check for
+	        // intersections between our previous and next segments
+	        if (prevSeg && nextSeg) {
+	          var inter = prevSeg.getIntersection(nextSeg);
+
+	          if (inter !== null) {
+	            if (!prevSeg.isAnEndpoint(inter)) {
+	              var _newEventsFromSplit3 = this._splitSafely(prevSeg, inter);
+
+	              for (var _i3 = 0, _iMax3 = _newEventsFromSplit3.length; _i3 < _iMax3; _i3++) {
+	                newEvents.push(_newEventsFromSplit3[_i3]);
+	              }
+	            }
+
+	            if (!nextSeg.isAnEndpoint(inter)) {
+	              var _newEventsFromSplit4 = this._splitSafely(nextSeg, inter);
+
+	              for (var _i4 = 0, _iMax4 = _newEventsFromSplit4.length; _i4 < _iMax4; _i4++) {
+	                newEvents.push(_newEventsFromSplit4[_i4]);
+	              }
+	            }
+	          }
 	        }
-	        _cache$2.closed[issue.item] += 1;
+
+	        this.tree.remove(segment);
 	      }
-	      if (callback) { callback(null, issue); }
-	    };
 
-	    _cache$2.inflightPost[issue.id] = controller;
+	      return newEvents;
+	    }
+	    /* Safely split a segment that is currently in the datastructures
+	     * IE - a segment other than the one that is currently being processed. */
 
-	    fetch(url, { signal: controller.signal })
-	      .then(after)
-	      .catch(function (err) {
-	        delete _cache$2.inflightPost[issue.id];
-	        if (callback) { callback(err.message); }
-	      });
-	  },
+	  }, {
+	    key: "_splitSafely",
+	    value: function _splitSafely(seg, pt) {
+	      // Rounding errors can cause changes in ordering,
+	      // so remove afected segments and right sweep events before splitting
+	      // removeNode() doesn't work, so have re-find the seg
+	      // https://github.com/w8r/splay-tree/pull/5
+	      this.tree.remove(seg);
+	      var rightSE = seg.rightSE;
+	      this.queue.remove(rightSE);
+	      var newEvents = seg.split(pt);
+	      newEvents.push(rightSE); // splitting can trigger consumption
 
-	  // Get all cached QAItems covering the viewport
-	  getItems: function getItems(projection) {
-	    var viewport = projection.clipExtent();
-	    var min = [viewport[0][0], viewport[1][1]];
-	    var max = [viewport[1][0], viewport[0][1]];
-	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	      if (seg.consumedBy === undefined) this.tree.insert(seg);
+	      return newEvents;
+	    }
+	  }]);
 
-	    return _cache$2.rtree.search(bbox).map(function (d) { return d.data; });
-	  },
+	  return SweepLine;
+	}();
 
-	  // Get a QAItem from cache
-	  // NOTE: Don't change method name until UI v3 is merged
-	  getError: function getError(id) {
-	    return _cache$2.data[id];
-	  },
+	var POLYGON_CLIPPING_MAX_QUEUE_SIZE = typeof process !== 'undefined' && process.env.POLYGON_CLIPPING_MAX_QUEUE_SIZE || 1000000;
+	var POLYGON_CLIPPING_MAX_SWEEPLINE_SEGMENTS = typeof process !== 'undefined' && process.env.POLYGON_CLIPPING_MAX_SWEEPLINE_SEGMENTS || 1000000;
 
-	  // get the name of the icon to display for this item
-	  getIcon: function getIcon(itemType) {
-	    return _osmoseData.icons[itemType];
-	  },
+	var Operation = /*#__PURE__*/function () {
+	  function Operation() {
+	    _classCallCheck(this, Operation);
+	  }
 
-	  // Replace a single QAItem in the cache
-	  replaceItem: function replaceItem(item) {
-	    if (!(item instanceof QAItem) || !item.id) { return; }
+	  _createClass(Operation, [{
+	    key: "run",
+	    value: function run(type, geom, moreGeoms) {
+	      operation.type = type;
+	      rounder.reset();
+	      /* Convert inputs to MultiPoly objects */
 
-	    _cache$2.data[item.id] = item;
-	    updateRtree$2(encodeIssueRtree$2(item), true); // true = replace
-	    return item;
-	  },
+	      var multipolys = [new MultiPolyIn(geom, true)];
 
-	  // Remove a single QAItem from the cache
-	  removeItem: function removeItem(item) {
-	    if (!(item instanceof QAItem) || !item.id) { return; }
+	      for (var i = 0, iMax = moreGeoms.length; i < iMax; i++) {
+	        multipolys.push(new MultiPolyIn(moreGeoms[i], false));
+	      }
 
-	    delete _cache$2.data[item.id];
-	    updateRtree$2(encodeIssueRtree$2(item), false); // false = remove
-	  },
+	      operation.numMultiPolys = multipolys.length;
+	      /* BBox optimization for difference operation
+	       * If the bbox of a multipolygon that's part of the clipping doesn't
+	       * intersect the bbox of the subject at all, we can just drop that
+	       * multiploygon. */
 
-	  // Used to populate `closed:osmose:*` changeset tags
-	  getClosedCounts: function getClosedCounts() {
-	    return _cache$2.closed;
-	  },
+	      if (operation.type === 'difference') {
+	        // in place removal
+	        var subject = multipolys[0];
+	        var _i = 1;
 
-	  itemURL: function itemURL(item) {
-	    return ("https://osmose.openstreetmap.fr/en/error/" + (item.id));
-	  }
-	};
+	        while (_i < multipolys.length) {
+	          if (getBboxOverlap(multipolys[_i].bbox, subject.bbox) !== null) _i++;else multipolys.splice(_i, 1);
+	        }
+	      }
+	      /* BBox optimization for intersection operation
+	       * If we can find any pair of multipolygons whose bbox does not overlap,
+	       * then the result will be empty. */
 
-	/*
-	    A standalone SVG element that contains only a `defs` sub-element. To be
-	    used once globally, since defs IDs must be unique within a document.
-	*/
-	function svgDefs(context) {
 
-	    function drawDefs(selection) {
-	        var defs = selection.append('defs');
-
-	        // add markers
-	        defs
-	            .append('marker')
-	            .attr('id', 'ideditor-oneway-marker')
-	            .attr('viewBox', '0 0 10 5')
-	            .attr('refX', 2.5)
-	            .attr('refY', 2.5)
-	            .attr('markerWidth', 2)
-	            .attr('markerHeight', 2)
-	            .attr('markerUnits', 'strokeWidth')
-	            .attr('orient', 'auto')
-	            .append('path')
-	            .attr('class', 'oneway-marker-path')
-	            .attr('d', 'M 5,3 L 0,3 L 0,2 L 5,2 L 5,0 L 10,2.5 L 5,5 z')
-	            .attr('stroke', 'none')
-	            .attr('fill', '#000')
-	            .attr('opacity', '0.75');
-
-	        // SVG markers have to be given a colour where they're defined
-	        // (they can't inherit it from the line they're attached to),
-	        // so we need to manually define markers for each color of tag
-	        // (also, it's slightly nicer if we can control the
-	        // positioning for different tags)
-	        function addSidedMarker(name, color, offset) {
-	            defs
-	                .append('marker')
-	                .attr('id', 'ideditor-sided-marker-' + name)
-	                .attr('viewBox', '0 0 2 2')
-	                .attr('refX', 1)
-	                .attr('refY', -offset)
-	                .attr('markerWidth', 1.5)
-	                .attr('markerHeight', 1.5)
-	                .attr('markerUnits', 'strokeWidth')
-	                .attr('orient', 'auto')
-	                .append('path')
-	                .attr('class', 'sided-marker-path sided-marker-' + name + '-path')
-	                .attr('d', 'M 0,0 L 1,1 L 2,0 z')
-	                .attr('stroke', 'none')
-	                .attr('fill', color);
-	        }
-	        addSidedMarker('natural', 'rgb(170, 170, 170)', 0);
-	        // for a coastline, the arrows are (somewhat unintuitively) on
-	        // the water side, so let's color them blue (with a gap) to
-	        // give a stronger indication
-	        addSidedMarker('coastline', '#77dede', 1);
-	        addSidedMarker('waterway', '#77dede', 1);
-	        // barriers have a dashed line, and separating the triangle
-	        // from the line visually suits that
-	        addSidedMarker('barrier', '#ddd', 1);
-	        addSidedMarker('man_made', '#fff', 0);
-
-	        defs
-	            .append('marker')
-	            .attr('id', 'ideditor-viewfield-marker')
-	            .attr('viewBox', '0 0 16 16')
-	            .attr('refX', 8)
-	            .attr('refY', 16)
-	            .attr('markerWidth', 4)
-	            .attr('markerHeight', 4)
-	            .attr('markerUnits', 'strokeWidth')
-	            .attr('orient', 'auto')
-	            .append('path')
-	            .attr('class', 'viewfield-marker-path')
-	            .attr('d', 'M 6,14 C 8,13.4 8,13.4 10,14 L 16,3 C 12,0 4,0 0,3 z')
-	            .attr('fill', '#333')
-	            .attr('fill-opacity', '0.75')
-	            .attr('stroke', '#fff')
-	            .attr('stroke-width', '0.5px')
-	            .attr('stroke-opacity', '0.75');
-
-	        defs
-	            .append('marker')
-	            .attr('id', 'ideditor-viewfield-marker-wireframe')
-	            .attr('viewBox', '0 0 16 16')
-	            .attr('refX', 8)
-	            .attr('refY', 16)
-	            .attr('markerWidth', 4)
-	            .attr('markerHeight', 4)
-	            .attr('markerUnits', 'strokeWidth')
-	            .attr('orient', 'auto')
-	            .append('path')
-	            .attr('class', 'viewfield-marker-path')
-	            .attr('d', 'M 6,14 C 8,13.4 8,13.4 10,14 L 16,3 C 12,0 4,0 0,3 z')
-	            .attr('fill', 'none')
-	            .attr('stroke', '#fff')
-	            .attr('stroke-width', '0.5px')
-	            .attr('stroke-opacity', '0.75');
-
-	        // add patterns
-	        var patterns = defs.selectAll('pattern')
-	            .data([
-	                // pattern name, pattern image name
-	                ['beach', 'dots'],
-	                ['construction', 'construction'],
-	                ['cemetery', 'cemetery'],
-	                ['cemetery_christian', 'cemetery_christian'],
-	                ['cemetery_buddhist', 'cemetery_buddhist'],
-	                ['cemetery_muslim', 'cemetery_muslim'],
-	                ['cemetery_jewish', 'cemetery_jewish'],
-	                ['farmland', 'farmland'],
-	                ['farmyard', 'farmyard'],
-	                ['forest', 'forest'],
-	                ['forest_broadleaved', 'forest_broadleaved'],
-	                ['forest_needleleaved', 'forest_needleleaved'],
-	                ['forest_leafless', 'forest_leafless'],
-	                ['golf_green', 'grass'],
-	                ['grass', 'grass'],
-	                ['landfill', 'landfill'],
-	                ['meadow', 'grass'],
-	                ['orchard', 'orchard'],
-	                ['pond', 'pond'],
-	                ['quarry', 'quarry'],
-	                ['scrub', 'bushes'],
-	                ['vineyard', 'vineyard'],
-	                ['water_standing', 'lines'],
-	                ['waves', 'waves'],
-	                ['wetland', 'wetland'],
-	                ['wetland_marsh', 'wetland_marsh'],
-	                ['wetland_swamp', 'wetland_swamp'],
-	                ['wetland_bog', 'wetland_bog'],
-	                ['wetland_reedbed', 'wetland_reedbed']
-	            ])
-	            .enter()
-	            .append('pattern')
-	            .attr('id', function (d) { return 'ideditor-pattern-' + d[0]; })
-	            .attr('width', 32)
-	            .attr('height', 32)
-	            .attr('patternUnits', 'userSpaceOnUse');
-
-	        patterns
-	            .append('rect')
-	            .attr('x', 0)
-	            .attr('y', 0)
-	            .attr('width', 32)
-	            .attr('height', 32)
-	            .attr('class', function (d) { return 'pattern-color-' + d[0]; });
-
-	        patterns
-	            .append('image')
-	            .attr('x', 0)
-	            .attr('y', 0)
-	            .attr('width', 32)
-	            .attr('height', 32)
-	            .attr('xlink:href', function (d) {
-	                return context.imagePath('pattern/' + d[1] + '.png');
-	            });
+	      if (operation.type === 'intersection') {
+	        // TODO: this is O(n^2) in number of polygons. By sorting the bboxes,
+	        //       it could be optimized to O(n * ln(n))
+	        for (var _i2 = 0, _iMax = multipolys.length; _i2 < _iMax; _i2++) {
+	          var mpA = multipolys[_i2];
 
-	        // add clip paths
-	        defs.selectAll('clipPath')
-	            .data([12, 18, 20, 32, 45])
-	            .enter()
-	            .append('clipPath')
-	            .attr('id', function (d) { return 'ideditor-clip-square-' + d; })
-	            .append('rect')
-	            .attr('x', 0)
-	            .attr('y', 0)
-	            .attr('width', function (d) { return d; })
-	            .attr('height', function (d) { return d; });
+	          for (var j = _i2 + 1, jMax = multipolys.length; j < jMax; j++) {
+	            if (getBboxOverlap(mpA.bbox, multipolys[j].bbox) === null) return [];
+	          }
+	        }
+	      }
+	      /* Put segment endpoints in a priority queue */
 
-	        // add symbol spritesheets
-	        defs
-	            .call(drawDefs.addSprites, [
-	                'iD-sprite', 'maki-sprite', 'temaki-sprite', 'fa-sprite', 'tnp-sprite', 'community-sprite'
-	            ], true);
-	    }
 
+	      var queue = new Tree(SweepEvent.compare);
 
-	    drawDefs.addSprites = function(selection, ids, overrideColors) {
-	        var spritesheets = selection.selectAll('.spritesheet');
-	        var currData = spritesheets.data();
-	        var data = utilArrayUniq(currData.concat(ids));
+	      for (var _i3 = 0, _iMax2 = multipolys.length; _i3 < _iMax2; _i3++) {
+	        var sweepEvents = multipolys[_i3].getSweepEvents();
 
-	        spritesheets
-	            .data(data)
-	            .enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'spritesheet spritesheet-' + d; })
-	            .each(function(d) {
-	                var url = context.imagePath(d + '.svg');
-	                var node = select(this).node();
-
-	                svg(url)
-	                    .then(function(svg) {
-	                        node.appendChild(
-	                            select(svg.documentElement).attr('id', 'ideditor-' + d).node()
-	                        );
-	                        if (overrideColors && d !== 'iD-sprite') {   // allow icon colors to be overridden..
-	                            select(node).selectAll('path')
-	                                .attr('fill', 'currentColor');
-	                        }
-	                    })
-	                    .catch(function() {
-	                        /* ignore */
-	                    });
-	            });
-	    };
+	        for (var _j = 0, _jMax = sweepEvents.length; _j < _jMax; _j++) {
+	          queue.insert(sweepEvents[_j]);
 
+	          if (queue.size > POLYGON_CLIPPING_MAX_QUEUE_SIZE) {
+	            // prevents an infinite loop, an otherwise common manifestation of bugs
+	            throw new Error('Infinite loop when putting segment endpoints in a priority queue ' + '(queue size too big). Please file a bug report.');
+	          }
+	        }
+	      }
+	      /* Pass the sweep line over those endpoints */
 
-	    return drawDefs;
-	}
-
-	/* global Mapillary:false */
-
-
-	var apibase = 'https://a.mapillary.com/v3/';
-	var viewercss = 'mapillary-js/mapillary.min.css';
-	var viewerjs = 'mapillary-js/mapillary.min.js';
-	var clientId = 'NzNRM2otQkR2SHJzaXJmNmdQWVQ0dzo1ZWYyMmYwNjdmNDdlNmVi';
-	var mapFeatureConfig = {
-	    values: [
-	        'construction--flat--crosswalk-plain',
-	        'marking--discrete--crosswalk-zebra',
-	        'object--banner',
-	        'object--bench',
-	        'object--bike-rack',
-	        'object--billboard',
-	        'object--catch-basin',
-	        'object--cctv-camera',
-	        'object--fire-hydrant',
-	        'object--mailbox',
-	        'object--manhole',
-	        'object--phone-booth',
-	        'object--sign--advertisement',
-	        'object--sign--information',
-	        'object--sign--store',
-	        'object--street-light',
-	        'object--support--utility-pole',
-	        'object--traffic-light--*',
-	        'object--traffic-light--pedestrians',
-	        'object--trash-can'
-	    ].join(',')
-	};
-	var maxResults = 1000;
-	var tileZoom = 14;
-	var tiler$3 = utilTiler().zoomExtent([tileZoom, tileZoom]).skipNullIsland(true);
-	var dispatch$4 = dispatch('loadedImages', 'loadedSigns', 'loadedMapFeatures', 'bearingChanged');
-	var _mlyFallback = false;
-	var _mlyCache;
-	var _mlyClicks;
-	var _mlySelectedImageKey;
-	var _mlyViewer;
 
+	      var sweepLine = new SweepLine(queue);
+	      var prevQueueSize = queue.size;
+	      var node = queue.pop();
 
-	function abortRequest$3(controller) {
-	    controller.abort();
-	}
+	      while (node) {
+	        var evt = node.key;
 
+	        if (queue.size === prevQueueSize) {
+	          // prevents an infinite loop, an otherwise common manifestation of bugs
+	          var seg = evt.segment;
+	          throw new Error("Unable to pop() ".concat(evt.isLeft ? 'left' : 'right', " SweepEvent ") + "[".concat(evt.point.x, ", ").concat(evt.point.y, "] from segment #").concat(seg.id, " ") + "[".concat(seg.leftSE.point.x, ", ").concat(seg.leftSE.point.y, "] -> ") + "[".concat(seg.rightSE.point.x, ", ").concat(seg.rightSE.point.y, "] from queue. ") + 'Please file a bug report.');
+	        }
 
-	function maxPageAtZoom(z) {
-	    if (z < 15)   { return 2; }
-	    if (z === 15) { return 5; }
-	    if (z === 16) { return 10; }
-	    if (z === 17) { return 20; }
-	    if (z === 18) { return 40; }
-	    if (z > 18)   { return 80; }
-	}
+	        if (queue.size > POLYGON_CLIPPING_MAX_QUEUE_SIZE) {
+	          // prevents an infinite loop, an otherwise common manifestation of bugs
+	          throw new Error('Infinite loop when passing sweep line over endpoints ' + '(queue size too big). Please file a bug report.');
+	        }
 
+	        if (sweepLine.segments.length > POLYGON_CLIPPING_MAX_SWEEPLINE_SEGMENTS) {
+	          // prevents an infinite loop, an otherwise common manifestation of bugs
+	          throw new Error('Infinite loop when passing sweep line over endpoints ' + '(too many sweep line segments). Please file a bug report.');
+	        }
 
-	function loadTiles(which, url, projection) {
-	    var currZoom = Math.floor(geoScaleToZoom(projection.scale()));
-	    var tiles = tiler$3.getTiles(projection);
+	        var newEvents = sweepLine.process(evt);
 
-	    // abort inflight requests that are no longer needed
-	    var cache = _mlyCache[which];
-	    Object.keys(cache.inflight).forEach(function(k) {
-	        var wanted = tiles.find(function(tile) { return k.indexOf(tile.id + ',') === 0; });
-	        if (!wanted) {
-	            abortRequest$3(cache.inflight[k]);
-	            delete cache.inflight[k];
+	        for (var _i4 = 0, _iMax3 = newEvents.length; _i4 < _iMax3; _i4++) {
+	          var _evt = newEvents[_i4];
+	          if (_evt.consumedBy === undefined) queue.insert(_evt);
 	        }
-	    });
 
-	    tiles.forEach(function(tile) {
-	        loadNextTilePage(which, currZoom, url, tile);
-	    });
-	}
+	        prevQueueSize = queue.size;
+	        node = queue.pop();
+	      } // free some memory we don't need anymore
 
 
-	function loadNextTilePage(which, currZoom, url, tile) {
-	    var cache = _mlyCache[which];
-	    var rect = tile.extent.rectangle();
-	    var maxPages = maxPageAtZoom(currZoom);
-	    var nextPage = cache.nextPage[tile.id] || 0;
-	    var nextURL = cache.nextURL[tile.id] || url +
-	        utilQsString({
-	            per_page: maxResults,
-	            page: nextPage,
-	            client_id: clientId,
-	            bbox: [rect[0], rect[1], rect[2], rect[3]].join(','),
-	        });
+	      rounder.reset();
+	      /* Collect and compile segments we're keeping into a multipolygon */
 
-	    if (nextPage > maxPages) { return; }
+	      var ringsOut = RingOut.factory(sweepLine.segments);
+	      var result = new MultiPolyOut(ringsOut);
+	      return result.getGeom();
+	    }
+	  }]);
 
-	    var id = tile.id + ',' + String(nextPage);
-	    if (cache.loaded[id] || cache.inflight[id]) { return; }
+	  return Operation;
+	}(); // singleton available by import
 
-	    var controller = new AbortController();
-	    cache.inflight[id] = controller;
 
-	    var options = {
-	        method: 'GET',
-	        signal: controller.signal,
-	        headers: { 'Content-Type': 'application/json' }
-	    };
+	var operation = new Operation();
 
-	    fetch(nextURL, options)
-	        .then(function(response) {
-	            if (!response.ok) {
-	                throw new Error(response.status + ' ' + response.statusText);
-	            }
-	            var linkHeader = response.headers.get('Link');
-	            if (linkHeader) {
-	                var pagination = parsePagination(linkHeader);
-	                if (pagination.next) {
-	                    cache.nextURL[tile.id] = pagination.next;
-	                }
-	            }
-	            return response.json();
-	        })
-	        .then(function(data) {
-	            cache.loaded[id] = true;
-	            delete cache.inflight[id];
-	            if (!data || !data.features || !data.features.length) {
-	                throw new Error('No Data');
-	            }
+	var union = function union(geom) {
+	  for (var _len = arguments.length, moreGeoms = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+	    moreGeoms[_key - 1] = arguments[_key];
+	  }
 
-	            var features = data.features.map(function(feature) {
-	                var loc = feature.geometry.coordinates;
-	                var d;
-
-	                // An image (shown as a green dot on the map) is a single street photo with extra
-	                // information such as location, camera angle (CA), camera model, and so on.
-	                // Each image feature is a GeoJSON Point
-	                if (which === 'images') {
-	                    d = {
-	                        loc: loc,
-	                        key: feature.properties.key,
-	                        ca: feature.properties.ca,
-	                        captured_at: feature.properties.captured_at,
-	                        captured_by: feature.properties.username,
-	                        pano: feature.properties.pano
-	                    };
-
-	                    cache.forImageKey[d.key] = d;     // cache imageKey -> image
-
-	                // Mapillary organizes images as sequences. A sequence of images are continuously captured
-	                // by a user at a give time. Sequences are shown on the map as green lines.
-	                // Each sequence feature is a GeoJSON LineString
-	                } else if (which === 'sequences') {
-	                    var sequenceKey = feature.properties.key;
-	                    cache.lineString[sequenceKey] = feature;           // cache sequenceKey -> lineString
-	                    feature.properties.coordinateProperties.image_keys.forEach(function(imageKey) {
-	                        cache.forImageKey[imageKey] = sequenceKey;     // cache imageKey -> sequenceKey
-	                    });
-	                    return false;    // because no `d` data worth loading into an rbush
-
-	                // An image detection is a semantic pixel area on an image. The area could indicate
-	                // sky, trees, sidewalk in the image. A detection can be a polygon, a bounding box, or a point.
-	                // Each image_detection feature is a GeoJSON Point (located where the image was taken)
-	                } else if (which === 'image_detections') {
-	                    d = {
-	                        key: feature.properties.key,
-	                        image_key: feature.properties.image_key,
-	                        value: feature.properties.value,
-	                        package: feature.properties.package,
-	                        shape: feature.properties.shape
-	                    };
-
-	                    // cache imageKey -> image_detections
-	                    if (!cache.forImageKey[d.image_key]) {
-	                        cache.forImageKey[d.image_key] = [];
-	                    }
-	                    cache.forImageKey[d.image_key].push(d);
-	                    return false;    // because no `d` data worth loading into an rbush
-
-
-	                // A map feature is a real world object that can be shown on a map. It could be any object
-	                // recognized from images, manually added in images, or added on the map.
-	                // Each map feature is a GeoJSON Point (located where the feature is)
-	                } else if (which === 'map_features' || which === 'points') {
-	                    d = {
-	                        loc: loc,
-	                        key: feature.properties.key,
-	                        value: feature.properties.value,
-	                        package: feature.properties.package,
-	                        detections: feature.properties.detections
-	                    };
-	                }
+	  return operation.run('union', geom, moreGeoms);
+	};
 
-	                return {
-	                    minX: loc[0], minY: loc[1], maxX: loc[0], maxY: loc[1], data: d
-	                };
+	var intersection$1 = function intersection(geom) {
+	  for (var _len2 = arguments.length, moreGeoms = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
+	    moreGeoms[_key2 - 1] = arguments[_key2];
+	  }
 
-	            }).filter(Boolean);
+	  return operation.run('intersection', geom, moreGeoms);
+	};
 
-	            if (cache.rtree && features) {
-	                cache.rtree.load(features);
-	            }
+	var xor = function xor(geom) {
+	  for (var _len3 = arguments.length, moreGeoms = new Array(_len3 > 1 ? _len3 - 1 : 0), _key3 = 1; _key3 < _len3; _key3++) {
+	    moreGeoms[_key3 - 1] = arguments[_key3];
+	  }
 
-	            if (data.features.length === maxResults) {  // more pages to load
-	                cache.nextPage[tile.id] = nextPage + 1;
-	                loadNextTilePage(which, currZoom, url, tile);
-	            } else {
-	                cache.nextPage[tile.id] = Infinity;     // no more pages to load
-	            }
+	  return operation.run('xor', geom, moreGeoms);
+	};
 
-	            if (which === 'images' || which === 'sequences') {
-	                dispatch$4.call('loadedImages');
-	            } else if (which === 'map_features') {
-	                dispatch$4.call('loadedSigns');
-	            } else if (which === 'points') {
-	                dispatch$4.call('loadedMapFeatures');
-	            }
-	        })
-	        .catch(function() {
-	            cache.loaded[id] = true;
-	            delete cache.inflight[id];
-	        });
-	}
+	var difference = function difference(subjectGeom) {
+	  for (var _len4 = arguments.length, clippingGeoms = new Array(_len4 > 1 ? _len4 - 1 : 0), _key4 = 1; _key4 < _len4; _key4++) {
+	    clippingGeoms[_key4 - 1] = arguments[_key4];
+	  }
 
-	// extract links to pages of API results
-	function parsePagination(links) {
-	    return links.split(',').map(function(rel) {
-	        var elements = rel.split(';');
-	        if (elements.length === 2) {
-	            return [
-	                /<(.+)>/.exec(elements[0])[1],
-	                /rel="(.+)"/.exec(elements[1])[1]
-	            ];
+	  return operation.run('difference', subjectGeom, clippingGeoms);
+	};
+
+	var index = {
+	  union: union,
+	  intersection: intersection$1,
+	  xor: xor,
+	  difference: difference
+	};
+
+	var geojsonPrecision = {exports: {}};
+
+	(function () {
+	  function parse(t, coordinatePrecision, extrasPrecision) {
+	    function point(p) {
+	      return p.map(function (e, index) {
+	        if (index < 2) {
+	          return 1 * e.toFixed(coordinatePrecision);
 	        } else {
-	            return ['',''];
+	          return 1 * e.toFixed(extrasPrecision);
 	        }
-	    }).reduce(function(pagination, val) {
-	        pagination[val[1]] = val[0];
-	        return pagination;
-	    }, {});
-	}
+	      });
+	    }
 
+	    function multi(l) {
+	      return l.map(point);
+	    }
 
-	// partition viewport into higher zoom tiles
-	function partitionViewport(projection) {
-	    var z = geoScaleToZoom(projection.scale());
-	    var z2 = (Math.ceil(z * 2) / 2) + 2.5;   // round to next 0.5 and add 2.5
-	    var tiler = utilTiler().zoomExtent([z2, z2]);
+	    function poly(p) {
+	      return p.map(multi);
+	    }
 
-	    return tiler.getTiles(projection)
-	        .map(function(tile) { return tile.extent; });
-	}
+	    function multiPoly(m) {
+	      return m.map(poly);
+	    }
 
+	    function geometry(obj) {
+	      if (!obj) {
+	        return {};
+	      }
 
-	// no more than `limit` results per partition.
-	function searchLimited(limit, projection, rtree) {
-	    limit = limit || 5;
+	      switch (obj.type) {
+	        case "Point":
+	          obj.coordinates = point(obj.coordinates);
+	          return obj;
 
-	    return partitionViewport(projection)
-	        .reduce(function(result, extent) {
-	            var found = rtree.search(extent.bbox())
-	                .slice(0, limit)
-	                .map(function(d) { return d.data; });
+	        case "LineString":
+	        case "MultiPoint":
+	          obj.coordinates = multi(obj.coordinates);
+	          return obj;
 
-	            return (found.length ? result.concat(found) : result);
-	        }, []);
-	}
+	        case "Polygon":
+	        case "MultiLineString":
+	          obj.coordinates = poly(obj.coordinates);
+	          return obj;
 
+	        case "MultiPolygon":
+	          obj.coordinates = multiPoly(obj.coordinates);
+	          return obj;
 
+	        case "GeometryCollection":
+	          obj.geometries = obj.geometries.map(geometry);
+	          return obj;
 
-	var serviceMapillary = {
+	        default:
+	          return {};
+	      }
+	    }
 
-	    init: function() {
-	        if (!_mlyCache) {
-	            this.reset();
-	        }
+	    function feature(obj) {
+	      obj.geometry = geometry(obj.geometry);
+	      return obj;
+	    }
 
-	        this.event = utilRebind(this, dispatch$4, 'on');
-	    },
+	    function featureCollection(f) {
+	      f.features = f.features.map(feature);
+	      return f;
+	    }
 
-	    reset: function() {
-	        if (_mlyCache) {
-	            Object.values(_mlyCache.images.inflight).forEach(abortRequest$3);
-	            Object.values(_mlyCache.image_detections.inflight).forEach(abortRequest$3);
-	            Object.values(_mlyCache.map_features.inflight).forEach(abortRequest$3);
-	            Object.values(_mlyCache.points.inflight).forEach(abortRequest$3);
-	            Object.values(_mlyCache.sequences.inflight).forEach(abortRequest$3);
-	        }
-
-	        _mlyCache = {
-	            images: { inflight: {}, loaded: {}, nextPage: {}, nextURL: {}, rtree: new RBush(), forImageKey: {} },
-	            image_detections: { inflight: {}, loaded: {}, nextPage: {}, nextURL: {}, forImageKey: {} },
-	            map_features: { inflight: {}, loaded: {}, nextPage: {}, nextURL: {}, rtree: new RBush() },
-	            points: { inflight: {}, loaded: {}, nextPage: {}, nextURL: {}, rtree: new RBush() },
-	            sequences: { inflight: {}, loaded: {}, nextPage: {}, nextURL: {}, rtree: new RBush(), forImageKey: {}, lineString: {} }
-	        };
+	    function geometryCollection(g) {
+	      g.geometries = g.geometries.map(geometry);
+	      return g;
+	    }
 
-	        _mlySelectedImageKey = null;
-	        _mlyClicks = [];
-	    },
+	    if (!t) {
+	      return t;
+	    }
 
+	    switch (t.type) {
+	      case "Feature":
+	        return feature(t);
 
-	    images: function(projection) {
-	        var limit = 5;
-	        return searchLimited(limit, projection, _mlyCache.images.rtree);
-	    },
+	      case "GeometryCollection":
+	        return geometryCollection(t);
 
+	      case "FeatureCollection":
+	        return featureCollection(t);
 
-	    signs: function(projection) {
-	        var limit = 5;
-	        return searchLimited(limit, projection, _mlyCache.map_features.rtree);
-	    },
+	      case "Point":
+	      case "LineString":
+	      case "Polygon":
+	      case "MultiPoint":
+	      case "MultiPolygon":
+	      case "MultiLineString":
+	        return geometry(t);
+
+	      default:
+	        return t;
+	    }
+	  }
+
+	  geojsonPrecision.exports = parse;
+	  geojsonPrecision.exports.parse = parse;
+	})();
 
+	var precision = geojsonPrecision.exports;
 
-	    mapFeatures: function(projection) {
-	        var limit = 5;
-	        return searchLimited(limit, projection, _mlyCache.points.rtree);
-	    },
+	var $$d = _export;
+	var fails$5 = fails$N;
+	var toObject = toObject$i;
+	var toPrimitive = toPrimitive$7;
 
+	var FORCED$3 = fails$5(function () {
+	  return new Date(NaN).toJSON() !== null
+	    || Date.prototype.toJSON.call({ toISOString: function () { return 1; } }) !== 1;
+	});
 
-	    cachedImage: function(imageKey) {
-	        return _mlyCache.images.forImageKey[imageKey];
-	    },
+	// `Date.prototype.toJSON` method
+	// https://tc39.es/ecma262/#sec-date.prototype.tojson
+	$$d({ target: 'Date', proto: true, forced: FORCED$3 }, {
+	  // eslint-disable-next-line no-unused-vars -- required for `.length`
+	  toJSON: function toJSON(key) {
+	    var O = toObject(this);
+	    var pv = toPrimitive(O);
+	    return typeof pv == 'number' && !isFinite(pv) ? null : O.toISOString();
+	  }
+	});
+
+	var $$c = _export;
+
+	// `URL.prototype.toJSON` method
+	// https://url.spec.whatwg.org/#dom-url-tojson
+	$$c({ target: 'URL', proto: true, enumerable: true }, {
+	  toJSON: function toJSON() {
+	    return URL.prototype.toString.call(this);
+	  }
+	});
+
+	function isObject$3(obj) {
+	  return _typeof(obj) === 'object' && obj !== null;
+	}
 
+	function forEach(obj, cb) {
+	  if (Array.isArray(obj)) {
+	    obj.forEach(cb);
+	  } else if (isObject$3(obj)) {
+	    Object.keys(obj).forEach(function (key) {
+	      var val = obj[key];
+	      cb(val, key);
+	    });
+	  }
+	}
 
-	    sequences: function(projection) {
-	        var viewport = projection.clipExtent();
-	        var min = [viewport[0][0], viewport[1][1]];
-	        var max = [viewport[1][0], viewport[0][1]];
-	        var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
-	        var sequenceKeys = {};
+	function getTreeDepth(obj) {
+	  var depth = 0;
 
-	        // all sequences for images in viewport
-	        _mlyCache.images.rtree.search(bbox)
-	            .forEach(function(d) {
-	                var sequenceKey = _mlyCache.sequences.forImageKey[d.data.key];
-	                if (sequenceKey) {
-	                    sequenceKeys[sequenceKey] = true;
-	                }
-	            });
+	  if (Array.isArray(obj) || isObject$3(obj)) {
+	    forEach(obj, function (val) {
+	      if (Array.isArray(val) || isObject$3(val)) {
+	        var tmpDepth = getTreeDepth(val);
 
-	        // Return lineStrings for the sequences
-	        return Object.keys(sequenceKeys).map(function(sequenceKey) {
-	            return _mlyCache.sequences.lineString[sequenceKey];
-	        });
-	    },
+	        if (tmpDepth > depth) {
+	          depth = tmpDepth;
+	        }
+	      }
+	    });
+	    return depth + 1;
+	  }
 
+	  return depth;
+	}
 
-	    signsSupported: function() {
-	        return true;
-	    },
+	function stringify(obj, options) {
+	  options = options || {};
+	  var indent = JSON.stringify([1], null, get(options, 'indent', 2)).slice(2, -3);
+	  var addMargin = get(options, 'margins', false);
+	  var addArrayMargin = get(options, 'arrayMargins', false);
+	  var addObjectMargin = get(options, 'objectMargins', false);
+	  var maxLength = indent === '' ? Infinity : get(options, 'maxLength', 80);
+	  var maxNesting = get(options, 'maxNesting', Infinity);
+	  return function _stringify(obj, currentIndent, reserved) {
+	    if (obj && typeof obj.toJSON === 'function') {
+	      obj = obj.toJSON();
+	    }
 
+	    var string = JSON.stringify(obj);
 
-	    loadImages: function(projection) {
-	        loadTiles('images', apibase + 'images?sort_by=key&', projection);
-	        loadTiles('sequences', apibase + 'sequences?sort_by=key&', projection);
-	    },
+	    if (string === undefined) {
+	      return string;
+	    }
 
+	    var length = maxLength - currentIndent.length - reserved;
+	    var treeDepth = getTreeDepth(obj);
 
-	    loadSigns: function(projection) {
-	        // if we are looking at signs, we'll actually need to fetch images too
-	        loadTiles('images', apibase + 'images?sort_by=key&', projection);
-	        loadTiles('map_features', apibase + 'map_features?layers=trafficsigns&min_nbr_image_detections=2&sort_by=key&', projection);
-	        loadTiles('image_detections', apibase + 'image_detections?layers=trafficsigns&sort_by=key&', projection);
-	    },
+	    if (treeDepth <= maxNesting && string.length <= length) {
+	      var prettified = prettify(string, {
+	        addMargin: addMargin,
+	        addArrayMargin: addArrayMargin,
+	        addObjectMargin: addObjectMargin
+	      });
 
+	      if (prettified.length <= length) {
+	        return prettified;
+	      }
+	    }
 
-	    loadMapFeatures: function(projection) {
-	        // if we are looking at signs, we'll actually need to fetch images too
-	        loadTiles('images', apibase + 'images?sort_by=key', projection);
-	        loadTiles('points', apibase + 'map_features?layers=points&min_nbr_image_detections=2&sort_by=key&values=' + mapFeatureConfig.values + '&', projection);
-	        loadTiles('image_detections', apibase + 'image_detections?layers=points&sort_by=key&values=' + mapFeatureConfig.values + '&', projection);
-	    },
+	    if (isObject$3(obj)) {
+	      var nextIndent = currentIndent + indent;
+	      var items = [];
+	      var delimiters;
 
+	      var comma = function comma(array, index) {
+	        return index === array.length - 1 ? 0 : 1;
+	      };
 
-	    loadViewer: function(context) {
-	        // add mly-wrapper
-	        var wrap = context.container().select('.photoviewer')
-	            .selectAll('.mly-wrapper')
-	            .data([0]);
+	      if (Array.isArray(obj)) {
+	        for (var index = 0; index < obj.length; index++) {
+	          items.push(_stringify(obj[index], nextIndent, comma(obj, index)) || 'null');
+	        }
 
-	        wrap.enter()
-	            .append('div')
-	            .attr('id', 'ideditor-mly')
-	            .attr('class', 'photo-wrapper mly-wrapper')
-	            .classed('hide', true);
+	        delimiters = '[]';
+	      } else {
+	        Object.keys(obj).forEach(function (key, index, array) {
+	          var keyPart = JSON.stringify(key) + ': ';
 
-	        // load mapillary-viewercss
-	        select('head').selectAll('#ideditor-mapillary-viewercss')
-	            .data([0])
-	            .enter()
-	            .append('link')
-	            .attr('id', 'ideditor-mapillary-viewercss')
-	            .attr('rel', 'stylesheet')
-	            .attr('href', context.asset(viewercss));
+	          var value = _stringify(obj[key], nextIndent, keyPart.length + comma(array, index));
 
-	        // load mapillary-viewerjs
-	        select('head').selectAll('#ideditor-mapillary-viewerjs')
-	            .data([0])
-	            .enter()
-	            .append('script')
-	            .attr('id', 'ideditor-mapillary-viewerjs')
-	            .attr('src', context.asset(viewerjs));
-
-	        // load mapillary signs sprite
-	        var defs = context.container().select('defs');
-	        defs.call(svgDefs(context).addSprites, ['mapillary-sprite', 'mapillary-object-sprite'], false /* don't override colors */ );
-
-	        // Register viewer resize handler
-	        context.ui().photoviewer.on('resize.mapillary', function() {
-	            if (_mlyViewer) {
-	                _mlyViewer.resize();
-	            }
+	          if (value !== undefined) {
+	            items.push(keyPart + value);
+	          }
 	        });
-	    },
+	        delimiters = '{}';
+	      }
 
+	      if (items.length > 0) {
+	        return [delimiters[0], indent + items.join(',\n' + nextIndent), delimiters[1]].join('\n' + currentIndent);
+	      }
+	    }
 
-	    showViewer: function(context) {
-	        var wrap = context.container().select('.photoviewer')
-	            .classed('hide', false);
+	    return string;
+	  }(obj, '', 0);
+	} // Note: This regex matches even invalid JSON strings, but since we’re
+	// working on the output of `JSON.stringify` we know that only valid strings
+	// are present (unless the user supplied a weird `options.indent` but in
+	// that case we don’t care since the output would be invalid anyway).
 
-	        var isHidden = wrap.selectAll('.photo-wrapper.mly-wrapper.hide').size();
 
-	        if (isHidden && _mlyViewer) {
-	            wrap
-	                .selectAll('.photo-wrapper:not(.mly-wrapper)')
-	                .classed('hide', true);
+	var stringOrChar = /("(?:[^\\"]|\\.)*")|[:,\][}{]/g;
 
-	            wrap
-	                .selectAll('.photo-wrapper.mly-wrapper')
-	                .classed('hide', false);
+	function prettify(string, options) {
+	  options = options || {};
+	  var tokens = {
+	    '{': '{',
+	    '}': '}',
+	    '[': '[',
+	    ']': ']',
+	    ',': ', ',
+	    ':': ': '
+	  };
 
-	            _mlyViewer.resize();
-	        }
+	  if (options.addMargin || options.addObjectMargin) {
+	    tokens['{'] = '{ ';
+	    tokens['}'] = ' }';
+	  }
 
-	        return this;
-	    },
+	  if (options.addMargin || options.addArrayMargin) {
+	    tokens['['] = '[ ';
+	    tokens[']'] = ' ]';
+	  }
 
+	  return string.replace(stringOrChar, function (match, string) {
+	    return string ? match : tokens[match];
+	  });
+	}
 
-	    hideViewer: function(context) {
-	        _mlySelectedImageKey = null;
+	function get(options, name, defaultValue) {
+	  return name in options ? options[name] : defaultValue;
+	}
 
-	        if (!_mlyFallback && _mlyViewer) {
-	            _mlyViewer.getComponent('sequence').stop();
-	        }
+	var jsonStringifyPrettyCompact = stringify;
 
-	        var viewer = context.container().select('.photoviewer');
-	        if (!viewer.empty()) { viewer.datum(null); }
+	var _default = /*#__PURE__*/function () {
+	  // constructor
+	  //
+	  // `fc`  Optional FeatureCollection of known features
+	  //
+	  // Optionally pass a GeoJSON FeatureCollection of known features which we can refer to later.
+	  // Each feature must have a filename-like `id`, for example: `something.geojson`
+	  //
+	  // {
+	  //   "type": "FeatureCollection"
+	  //   "features": [
+	  //     {
+	  //       "type": "Feature",
+	  //       "id": "philly_metro.geojson",
+	  //       "properties": { … },
+	  //       "geometry": { … }
+	  //     }
+	  //   ]
+	  // }
+	  function _default(fc) {
+	    var _this = this;
 
-	        viewer
-	            .classed('hide', true)
-	            .selectAll('.photo-wrapper')
-	            .classed('hide', true);
+	    _classCallCheck$1(this, _default);
 
-	        context.container().selectAll('.viewfield-group, .sequence, .icon-detected')
-	            .classed('currentView', false);
+	    // The _cache retains resolved features, so if you ask for the same thing multiple times
+	    // we don't repeat the expensive resolving/clipping operations.
+	    //
+	    // Each feature has a stable identifier that is used as the cache key.
+	    // The identifiers look like:
+	    // - for point locations, the stringified point:          e.g. '[8.67039,49.41882]'
+	    // - for geojson locations, the geojson id:               e.g. 'de-hamburg.geojson'
+	    // - for countrycoder locations, feature.id property:     e.g. 'Q2'  (countrycoder uses Wikidata identifiers)
+	    // - for aggregated locationSets, +[include]-[exclude]:   e.g '+[Q2]-[Q18,Q27611]'
+	    this._cache = {}; // When strict mode = true, throw on invalid locations or locationSets.
+	    // When strict mode = false, return `null` for invalid locations or locationSets.
 
-	        return this.setStyles(context, null, true);
-	    },
+	    this._strict = true; // process input FeatureCollection
 
+	    if (fc && fc.type === 'FeatureCollection' && Array.isArray(fc.features)) {
+	      fc.features.forEach(function (feature) {
+	        feature.properties = feature.properties || {};
+	        var props = feature.properties; // Get `id` from either `id` or `properties`
 
-	    parsePagination: parsePagination,
+	        var id = feature.id || props.id;
+	        if (!id || !/^\S+\.geojson$/i.test(id)) return; // Ensure `id` exists and is lowercase
 
+	        id = id.toLowerCase();
+	        feature.id = id;
+	        props.id = id; // Ensure `area` property exists
 
-	    updateViewer: function(context, imageKey) {
-	        if (!imageKey) { return this; }
+	        if (!props.area) {
+	          var area = geojsonArea.geometry(feature.geometry) / 1e6; // m² to km²
 
-	        if (!_mlyViewer) {
-	            this.initViewer(context, imageKey);
-	        } else {
-	            _mlyViewer.moveToKey(imageKey)
-	                .catch(function(e) { console.error('mly3', e); });  // eslint-disable-line no-console
+	          props.area = Number(area.toFixed(2));
 	        }
 
-	        return this;
-	    },
+	        _this._cache[id] = feature;
+	      });
+	    } // Replace CountryCoder world geometry to be a polygon covering the world.
 
 
-	    initViewer: function(context, imageKey) {
-	        var that = this;
-	        if (window.Mapillary && imageKey) {
-	            var opts = {
-	                baseImageSize: 320,
-	                component: {
-	                    cover: false,
-	                    keyboard: false,
-	                    tag: true
-	                }
-	            };
+	    var world = _cloneDeep(feature$1('Q2'));
 
-	            // Disable components requiring WebGL support
-	            if (!Mapillary.isSupported() && Mapillary.isFallbackSupported()) {
-	                _mlyFallback = true;
-	                opts.component = {
-	                    cover: false,
-	                    direction: false,
-	                    imagePlane: false,
-	                    keyboard: false,
-	                    mouse: false,
-	                    sequence: false,
-	                    tag: false,
-	                    image: true,        // fallback
-	                    navigation: true    // fallback
-	                };
-	            }
+	    world.geometry = {
+	      type: 'Polygon',
+	      coordinates: [[[-180, -90], [180, -90], [180, 90], [-180, 90], [-180, -90]]]
+	    };
+	    world.id = 'Q2';
+	    world.properties.id = 'Q2';
+	    world.properties.area = geojsonArea.geometry(world.geometry) / 1e6; // m² to km²
 
-	            _mlyViewer = new Mapillary.Viewer('ideditor-mly', clientId, null, opts);
-	            _mlyViewer.on('nodechanged', nodeChanged);
-	            _mlyViewer.on('bearingchanged', bearingChanged);
-	            _mlyViewer.moveToKey(imageKey)
-	                .catch(function(e) { console.error('mly3', e); });  // eslint-disable-line no-console
-	        }
-
-	        // nodeChanged: called after the viewer has changed images and is ready.
-	        //
-	        // There is some logic here to batch up clicks into a _mlyClicks array
-	        // because the user might click on a lot of markers quickly and nodechanged
-	        // may be called out of order asynchronously.
-	        //
-	        // Clicks are added to the array in `selectedImage` and removed here.
-	        //
-	        function nodeChanged(node) {
-	            if (!_mlyFallback) {
-	                _mlyViewer.getComponent('tag').removeAll();  // remove previous detections
-	            }
+	    this._cache.Q2 = world;
+	  } // validateLocation
+	  // `location`  The location to validate
+	  //
+	  // Pass a `location` value to validate
+	  //
+	  // Returns a result like:
+	  //   {
+	  //     type:     'point', 'geojson', or 'countrycoder'
+	  //     location:  the queried location
+	  //     id:        the stable identifier for the feature
+	  //   }
+	  // or `null` if the location is invalid
+	  //
 
-	            var clicks = _mlyClicks;
-	            var index = clicks.indexOf(node.key);
-	            var selectedKey = _mlySelectedImageKey;
 
-	            if (index > -1) {              // `nodechanged` initiated from clicking on a marker..
-	                clicks.splice(index, 1);   // remove the click
-	                // If `node.key` matches the current _mlySelectedImageKey, call `selectImage()`
-	                // one more time to update the detections and attribution..
-	                if (node.key === selectedKey) {
-	                    that.selectImage(context, _mlySelectedImageKey, true);
-	                }
-	            } else {             // `nodechanged` initiated from the Mapillary viewer controls..
-	                var loc = node.computedLatLon ? [node.computedLatLon.lon, node.computedLatLon.lat] : [node.latLon.lon, node.latLon.lat];
-	                context.map().centerEase(loc);
-	                that.selectImage(context, node.key, true);
-	            }
+	  _createClass$1(_default, [{
+	    key: "validateLocation",
+	    value: function validateLocation(location) {
+	      if (Array.isArray(location) && (location.length === 2 || location.length === 3)) {
+	        // [lon, lat] or [lon, lat, radius] point?
+	        var lon = location[0];
+	        var lat = location[1];
+	        var radius = location[2];
+
+	        if (Number.isFinite(lon) && lon >= -180 && lon <= 180 && Number.isFinite(lat) && lat >= -90 && lat <= 90 && (location.length === 2 || Number.isFinite(radius) && radius > 0)) {
+	          var id = '[' + location.toString() + ']';
+	          return {
+	            type: 'point',
+	            location: location,
+	            id: id
+	          };
 	        }
+	      } else if (typeof location === 'string' && /^\S+\.geojson$/i.test(location)) {
+	        // a .geojson filename?
+	        var _id = location.toLowerCase();
 
-	        function bearingChanged(e) {
-	            dispatch$4.call('bearingChanged', undefined, e);
+	        if (this._cache[_id]) {
+	          return {
+	            type: 'geojson',
+	            location: location,
+	            id: _id
+	          };
 	        }
-	    },
+	      } else if (typeof location === 'string' || typeof location === 'number') {
+	        // a country-coder value?
+	        var feature = feature$1(location);
 
+	        if (feature) {
+	          // Use wikidata QID as the identifier, since that seems to be the one
+	          // property that everything in CountryCoder is guaranteed to have.
+	          var _id2 = feature.properties.wikidata;
+	          return {
+	            type: 'countrycoder',
+	            location: location,
+	            id: _id2
+	          };
+	        }
+	      }
 
-	    // Pass in the image key string as `imageKey`.
-	    // This allows images to be selected from places that dont have access
-	    // to the full image datum (like the street signs layer or the js viewer)
-	    selectImage: function(context, imageKey, fromViewer) {
+	      if (this._strict) {
+	        throw new Error("validateLocation:  Invalid location: \"".concat(location, "\"."));
+	      } else {
+	        return null;
+	      }
+	    } // resolveLocation
+	    // `location`  The location to resolve
+	    //
+	    // Pass a `location` value to resolve
+	    //
+	    // Returns a result like:
+	    //   {
+	    //     type:      'point', 'geojson', or 'countrycoder'
+	    //     location:  the queried location
+	    //     id:        a stable identifier for the feature
+	    //     feature:   the resolved GeoJSON feature
+	    //   }
+	    //  or `null` if the location is invalid
+	    //
 
-	        _mlySelectedImageKey = imageKey;
+	  }, {
+	    key: "resolveLocation",
+	    value: function resolveLocation(location) {
+	      var valid = this.validateLocation(location);
+	      if (!valid) return null;
+	      var id = valid.id; // Return a result from cache if we can
+
+	      if (this._cache[id]) {
+	        return Object.assign(valid, {
+	          feature: this._cache[id]
+	        });
+	      } // A [lon,lat] coordinate pair?
 
-	        // Note the datum could be missing, but we'll try to carry on anyway.
-	        // There just might be a delay before user sees detections, captured_at, etc.
-	        var d = _mlyCache.images.forImageKey[imageKey];
 
-	        var viewer = context.container().select('.photoviewer');
-	        if (!viewer.empty()) { viewer.datum(d); }
+	      if (valid.type === 'point') {
+	        var lon = location[0];
+	        var lat = location[1];
+	        var radius = location[2] || 25; // km
 
-	        imageKey = (d && d.key) || imageKey;
-	        if (!fromViewer && imageKey) {
-	            _mlyClicks.push(imageKey);
-	        }
+	        var EDGES = 10;
+	        var PRECISION = 3;
+	        var area = Math.PI * radius * radius;
+	        var feature = this._cache[id] = precision({
+	          type: 'Feature',
+	          id: id,
+	          properties: {
+	            id: id,
+	            area: Number(area.toFixed(2))
+	          },
+	          geometry: circleToPolygon([lon, lat], radius * 1000, EDGES) // km to m
+
+	        }, PRECISION);
+	        return Object.assign(valid, {
+	          feature: feature
+	        }); // A .geojson filename?
+	      } else if (valid.type === 'geojson') ; else if (valid.type === 'countrycoder') {
+	        var _feature = _cloneDeep(feature$1(id));
+
+	        var props = _feature.properties; // -> This block of code is weird and requires some explanation. <-
+	        // CountryCoder includes higher level features which are made up of members.
+	        // These features don't have their own geometry, but CountryCoder provides an
+	        //   `aggregateFeature` method to combine these members into a MultiPolygon.
+	        // In the past, Turf/JSTS/martinez could not handle the aggregated features,
+	        //   so we'd iteratively union them all together.  (this was slow)
+	        // But now mfogel/polygon-clipping handles these MultiPolygons like a boss.
+	        // This approach also has the benefit of removing all the internal boaders and
+	        //   simplifying the regional polygons a lot.
+
+	        if (Array.isArray(props.members)) {
+	          var aggregate = aggregateFeature(id);
+	          aggregate.geometry.coordinates = _clip([aggregate], 'UNION').geometry.coordinates;
+	          _feature.geometry = aggregate.geometry;
+	        } // Ensure `area` property exists
+
+
+	        if (!props.area) {
+	          var _area = geojsonArea.geometry(_feature.geometry) / 1e6; // m² to km²
+
+
+	          props.area = Number(_area.toFixed(2));
+	        } // Ensure `id` property exists
+
+
+	        _feature.id = id;
+	        props.id = id;
+	        this._cache[id] = _feature;
+	        return Object.assign(valid, {
+	          feature: _feature
+	        });
+	      }
 
-	        this.setStyles(context, null, true);
+	      if (this._strict) {
+	        throw new Error("resolveLocation:  Couldn't resolve location \"".concat(location, "\"."));
+	      } else {
+	        return null;
+	      }
+	    } // validateLocationSet
+	    // `locationSet`  the locationSet to validate
+	    //
+	    // Pass a locationSet Object to validate like:
+	    //   {
+	    //     include: [ Array of locations ],
+	    //     exclude: [ Array of locations ]
+	    //   }
+	    //
+	    // Returns a result like:
+	    //   {
+	    //     type:         'locationset'
+	    //     locationSet:  the queried locationSet
+	    //     id:           the stable identifier for the feature
+	    //   }
+	    // or `null` if the locationSet is invalid
+	    //
 
-	        // if signs signs are shown, highlight the ones that appear in this image
-	        context.container().selectAll('.layer-mapillary-signs .icon-detected')
-	            .classed('currentView', function(d) {
-	                return d.detections.some(function(detection) {
-	                    return detection.image_key === imageKey;
-	                });
-	            });
+	  }, {
+	    key: "validateLocationSet",
+	    value: function validateLocationSet(locationSet) {
+	      locationSet = locationSet || {};
+	      var validator = this.validateLocation.bind(this);
+	      var include = (locationSet.include || []).map(validator).filter(Boolean);
+	      var exclude = (locationSet.exclude || []).map(validator).filter(Boolean);
+
+	      if (!include.length) {
+	        if (this._strict) {
+	          throw new Error("validateLocationSet:  LocationSet includes nothing.");
+	        } else {
+	          // non-strict mode, replace an empty locationSet with one that includes "the world"
+	          locationSet.include = ['Q2'];
+	          include = [{
+	            type: 'countrycoder',
+	            location: 'Q2',
+	            id: 'Q2'
+	          }];
+	        }
+	      } // Generate stable identifier
+
+
+	      include.sort(_sortLocations);
+	      var id = '+[' + include.map(function (d) {
+	        return d.id;
+	      }).join(',') + ']';
+
+	      if (exclude.length) {
+	        exclude.sort(_sortLocations);
+	        id += '-[' + exclude.map(function (d) {
+	          return d.id;
+	        }).join(',') + ']';
+	      }
 
-	        if (d) {
-	            this.updateDetections(d);
-	        }
+	      return {
+	        type: 'locationset',
+	        locationSet: locationSet,
+	        id: id
+	      };
+	    } // resolveLocationSet
+	    // `locationSet`  the locationSet to resolve
+	    //
+	    // Pass a locationSet Object to validate like:
+	    //   {
+	    //     include: [ Array of locations ],
+	    //     exclude: [ Array of locations ]
+	    //   }
+	    //
+	    // Returns a result like:
+	    //   {
+	    //     type:         'locationset'
+	    //     locationSet:  the queried locationSet
+	    //     id:           the stable identifier for the feature
+	    //     feature:      the resolved GeoJSON feature
+	    //   }
+	    // or `null` if the locationSet is invalid
+	    //
 
-	        return this;
-	    },
+	  }, {
+	    key: "resolveLocationSet",
+	    value: function resolveLocationSet(locationSet) {
+	      locationSet = locationSet || {};
+	      var valid = this.validateLocationSet(locationSet);
+	      if (!valid) return null;
+	      var id = valid.id; // Return a result from cache if we can
+
+	      if (this._cache[id]) {
+	        return Object.assign(valid, {
+	          feature: this._cache[id]
+	        });
+	      }
 
+	      var resolver = this.resolveLocation.bind(this);
+	      var includes = (locationSet.include || []).map(resolver).filter(Boolean);
+	      var excludes = (locationSet.exclude || []).map(resolver).filter(Boolean); // Return quickly if it's a single included location..
 
-	    getSelectedImageKey: function() {
-	        return _mlySelectedImageKey;
-	    },
+	      if (includes.length === 1 && excludes.length === 0) {
+	        return Object.assign(valid, {
+	          feature: includes[0].feature
+	        });
+	      } // Calculate unions
 
 
-	    getSequenceKeyForImageKey: function(imageKey) {
-	        return _mlyCache.sequences.forImageKey[imageKey];
-	    },
+	      var includeGeoJSON = _clip(includes.map(function (d) {
+	        return d.feature;
+	      }), 'UNION');
 
+	      var excludeGeoJSON = _clip(excludes.map(function (d) {
+	        return d.feature;
+	      }), 'UNION'); // Calculate difference, update `area` and return result
 
-	    // Updates the currently highlighted sequence and selected bubble.
-	    // Reset is only necessary when interacting with the viewport because
-	    // this implicitly changes the currently selected bubble/sequence
-	    setStyles: function(context, hovered, reset) {
-	        if (reset) {  // reset all layers
-	            context.container().selectAll('.viewfield-group')
-	                .classed('highlighted', false)
-	                .classed('hovered', false)
-	                .classed('currentView', false);
 
-	            context.container().selectAll('.sequence')
-	                .classed('highlighted', false)
-	                .classed('currentView', false);
-	        }
+	      var resultGeoJSON = excludeGeoJSON ? _clip([includeGeoJSON, excludeGeoJSON], 'DIFFERENCE') : includeGeoJSON;
+	      var area = geojsonArea.geometry(resultGeoJSON.geometry) / 1e6; // m² to km²
 
-	        var hoveredImageKey = hovered && hovered.key;
-	        var hoveredSequenceKey = hoveredImageKey && this.getSequenceKeyForImageKey(hoveredImageKey);
-	        var hoveredLineString = hoveredSequenceKey && _mlyCache.sequences.lineString[hoveredSequenceKey];
-	        var hoveredImageKeys = (hoveredLineString && hoveredLineString.properties.coordinateProperties.image_keys) || [];
+	      resultGeoJSON.id = id;
+	      resultGeoJSON.properties = {
+	        id: id,
+	        area: Number(area.toFixed(2))
+	      };
+	      this._cache[id] = resultGeoJSON;
+	      return Object.assign(valid, {
+	        feature: resultGeoJSON
+	      });
+	    } // strict
+	    //
 
-	        var selectedImageKey = _mlySelectedImageKey;
-	        var selectedSequenceKey = selectedImageKey && this.getSequenceKeyForImageKey(selectedImageKey);
-	        var selectedLineString = selectedSequenceKey && _mlyCache.sequences.lineString[selectedSequenceKey];
-	        var selectedImageKeys = (selectedLineString && selectedLineString.properties.coordinateProperties.image_keys) || [];
+	  }, {
+	    key: "strict",
+	    value: function strict(val) {
+	      if (val === undefined) {
+	        // get
+	        return this._strict;
+	      } else {
+	        // set
+	        this._strict = val;
+	        return this;
+	      }
+	    } // cache
+	    // convenience method to access the internal cache
 
-	        // highlight sibling viewfields on either the selected or the hovered sequences
-	        var highlightedImageKeys = utilArrayUnion(hoveredImageKeys, selectedImageKeys);
+	  }, {
+	    key: "cache",
+	    value: function cache() {
+	      return this._cache;
+	    } // stringify
+	    // convenience method to prettyStringify the given object
 
-	        context.container().selectAll('.layer-mapillary .viewfield-group')
-	            .classed('highlighted', function(d) { return highlightedImageKeys.indexOf(d.key) !== -1; })
-	            .classed('hovered', function(d) { return d.key === hoveredImageKey; })
-	            .classed('currentView', function(d) { return d.key === selectedImageKey; });
+	  }, {
+	    key: "stringify",
+	    value: function stringify(obj, options) {
+	      return jsonStringifyPrettyCompact(obj, options);
+	    }
+	  }]);
+
+	  return _default;
+	}(); // Wrap the mfogel/polygon-clipping library and return a GeoJSON feature.
+
+	function _clip(features, which) {
+	  if (!Array.isArray(features) || !features.length) return null;
+	  var fn = {
+	    UNION: index.union,
+	    DIFFERENCE: index.difference
+	  }[which];
+	  var args = features.map(function (feature) {
+	    return feature.geometry.coordinates;
+	  });
+	  var coords = fn.apply(null, args);
+	  return {
+	    type: 'Feature',
+	    properties: {},
+	    geometry: {
+	      type: whichType(coords),
+	      coordinates: coords
+	    }
+	  }; // is this a Polygon or a MultiPolygon?
 
-	        context.container().selectAll('.layer-mapillary .sequence')
-	            .classed('highlighted', function(d) { return d.properties.key === hoveredSequenceKey; })
-	            .classed('currentView', function(d) { return d.properties.key === selectedSequenceKey; });
+	  function whichType(coords) {
+	    var a = Array.isArray(coords);
+	    var b = a && Array.isArray(coords[0]);
+	    var c = b && Array.isArray(coords[0][0]);
+	    var d = c && Array.isArray(coords[0][0][0]);
+	    return d ? 'MultiPolygon' : 'Polygon';
+	  }
+	}
 
-	        // update viewfields if needed
-	        context.container().selectAll('.viewfield-group .viewfield')
-	            .attr('d', viewfieldPath);
+	function _cloneDeep(obj) {
+	  return JSON.parse(JSON.stringify(obj));
+	} // Sorting the location lists is ok because they end up unioned together.
+	// This sorting makes it possible to generate a deterministic id.
 
-	        function viewfieldPath() {
-	            var d = this.parentNode.__data__;
-	            if (d.pano && d.key !== selectedImageKey) {
-	                return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-	            } else {
-	                return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
-	            }
-	        }
 
-	        return this;
-	    },
+	function _sortLocations(a, b) {
+	  var rank = {
+	    countrycoder: 1,
+	    geojson: 2,
+	    point: 3
+	  };
+	  var aRank = rank[a.type];
+	  var bRank = rank[b.type];
+	  return aRank > bRank ? 1 : aRank < bRank ? -1 : a.id.localeCompare(b.id);
+	}
 
+	var $$b = _export;
 
-	    updateDetections: function(d) {
-	        if (!_mlyViewer || _mlyFallback) { return; }
+	// `Number.MAX_SAFE_INTEGER` constant
+	// https://tc39.es/ecma262/#sec-number.max_safe_integer
+	$$b({ target: 'Number', stat: true }, {
+	  MAX_SAFE_INTEGER: 0x1FFFFFFFFFFFFF
+	});
 
-	        var imageKey = d && d.key;
-	        if (!imageKey) { return; }
+	var aesJs = {exports: {}};
 
-	        var detections = _mlyCache.image_detections.forImageKey[imageKey] || [];
-	        detections.forEach(function(data) {
-	            var tag = makeTag(data);
-	            if (tag) {
-	                var tagComponent = _mlyViewer.getComponent('tag');
-	                tagComponent.add([tag]);
-	            }
-	        });
+	(function (module, exports) {
+	  (function (root) {
 
-	        function makeTag(data) {
-	            var valueParts = data.value.split('--');
-	            if (valueParts.length !== 3) { return; }
-
-	            var text = valueParts[1].replace(/-/g, ' ');
-	            var tag;
-
-	            // Currently only two shapes <Polygon|Point>
-	            if (data.shape.type === 'Polygon') {
-	                var polygonGeometry = new Mapillary
-	                    .TagComponent
-	                    .PolygonGeometry(data.shape.coordinates[0]);
-
-	                tag = new Mapillary.TagComponent.OutlineTag(
-	                    data.key,
-	                    polygonGeometry,
-	                    {
-	                        text: text,
-	                        textColor: 0xffff00,
-	                        lineColor: 0xffff00,
-	                        lineWidth: 2,
-	                        fillColor: 0xffff00,
-	                        fillOpacity: 0.3,
-	                    }
-	                );
+	    function checkInt(value) {
+	      return parseInt(value) === value;
+	    }
 
-	            } else if (data.shape.type === 'Point') {
-	                var pointGeometry = new Mapillary
-	                    .TagComponent
-	                    .PointGeometry(data.shape.coordinates[0]);
-
-	                tag = new Mapillary.TagComponent.SpotTag(
-	                    data.key,
-	                    pointGeometry,
-	                    {
-	                        text: text,
-	                        color: 0xffff00,
-	                        textColor: 0xffff00
-	                    }
-	                );
-	            }
+	    function checkInts(arrayish) {
+	      if (!checkInt(arrayish.length)) {
+	        return false;
+	      }
 
-	            return tag;
+	      for (var i = 0; i < arrayish.length; i++) {
+	        if (!checkInt(arrayish[i]) || arrayish[i] < 0 || arrayish[i] > 255) {
+	          return false;
 	        }
-	    },
-
+	      }
 
-	    cache: function() {
-	        return _mlyCache;
+	      return true;
 	    }
 
-	};
-
-	function validationIssue(attrs) {
-	    this.type = attrs.type;                // required - name of rule that created the issue (e.g. 'missing_tag')
-	    this.subtype = attrs.subtype;          // optional - category of the issue within the type (e.g. 'relation_type' under 'missing_tag')
-	    this.severity = attrs.severity;        // required - 'warning' or 'error'
-	    this.message = attrs.message;          // required - function returning localized string
-	    this.reference = attrs.reference;      // optional - function(selection) to render reference information
-	    this.entityIds = attrs.entityIds;      // optional - array of IDs of entities involved in the issue
-	    this.loc = attrs.loc;                  // optional - [lon, lat] to zoom in on to see the issue
-	    this.data = attrs.data;                // optional - object containing extra data for the fixes
-	    this.dynamicFixes = attrs.dynamicFixes;// optional - function(context) returning fixes
-	    this.hash = attrs.hash;                // optional - string to further differentiate the issue
+	    function coerceArray(arg, copy) {
+	      // ArrayBuffer view
+	      if (arg.buffer && arg.name === 'Uint8Array') {
+	        if (copy) {
+	          if (arg.slice) {
+	            arg = arg.slice();
+	          } else {
+	            arg = Array.prototype.slice.call(arg);
+	          }
+	        }
 
-	    this.id = generateID.apply(this);      // generated - see below
-	    this.autoFix = null;                   // generated - if autofix exists, will be set below
+	        return arg;
+	      } // It's an array; check it is a valid representation of a byte
 
-	    // A unique, deterministic string hash.
-	    // Issues with identical id values are considered identical.
-	    function generateID() {
-	        var parts = [this.type];
 
-	        if (this.hash) {   // subclasses can pass in their own differentiator
-	            parts.push(this.hash);
+	      if (Array.isArray(arg)) {
+	        if (!checkInts(arg)) {
+	          throw new Error('Array contains invalid value: ' + arg);
 	        }
 
-	        if (this.subtype) {
-	            parts.push(this.subtype);
-	        }
+	        return new Uint8Array(arg);
+	      } // Something else, but behaves like an array (maybe a Buffer? Arguments?)
 
-	        // include the entities this issue is for
-	        // (sort them so the id is deterministic)
-	        if (this.entityIds) {
-	            var entityKeys = this.entityIds.slice().sort();
-	            parts.push.apply(parts, entityKeys);
-	        }
 
-	        return parts.join(':');
-	    }
+	      if (checkInt(arg.length) && checkInts(arg)) {
+	        return new Uint8Array(arg);
+	      }
 
-	    this.extent = function(resolver) {
-	        if (this.loc) {
-	            return geoExtent(this.loc);
-	        }
-	        if (this.entityIds && this.entityIds.length) {
-	            return this.entityIds.reduce(function(extent, entityId) {
-	                return extent.extend(resolver.entity(entityId).extent(resolver));
-	            }, geoExtent());
-	        }
-	        return null;
-	    };
+	      throw new Error('unsupported array-like object');
+	    }
 
-	    this.fixes = function(context) {
-	        var fixes = this.dynamicFixes ? this.dynamicFixes(context) : [];
-	        var issue = this;
+	    function createArray(length) {
+	      return new Uint8Array(length);
+	    }
 
-	        if (issue.severity === 'warning') {
-	            // allow ignoring any issue that's not an error
-	            fixes.push(new validationIssueFix({
-	                title: _t('issues.fix.ignore_issue.title'),
-	                icon: 'iD-icon-close',
-	                onClick: function() {
-	                    context.validator().ignoreIssue(this.issue.id);
-	                }
-	            }));
+	    function copyArray(sourceArray, targetArray, targetStart, sourceStart, sourceEnd) {
+	      if (sourceStart != null || sourceEnd != null) {
+	        if (sourceArray.slice) {
+	          sourceArray = sourceArray.slice(sourceStart, sourceEnd);
+	        } else {
+	          sourceArray = Array.prototype.slice.call(sourceArray, sourceStart, sourceEnd);
 	        }
+	      }
 
-	        fixes.forEach(function(fix) {
-	            fix.id = fix.title;
-	            // add a reference to the issue for use in actions
-	            fix.issue = issue;
-	            if (fix.autoArgs) {
-	                issue.autoFix = fix;
-	            }
-	        });
-	        return fixes;
-	    };
+	      targetArray.set(sourceArray, targetStart);
+	    }
 
-	}
+	    var convertUtf8 = function () {
+	      function toBytes(text) {
+	        var result = [],
+	            i = 0;
+	        text = encodeURI(text);
 
+	        while (i < text.length) {
+	          var c = text.charCodeAt(i++); // if it is a % sign, encode the following 2 bytes as a hex value
 
-	function validationIssueFix(attrs) {
-	    this.title = attrs.title;                   // Required
-	    this.onClick = attrs.onClick;               // Optional - the function to run to apply the fix
-	    this.disabledReason = attrs.disabledReason; // Optional - a string explaining why the fix is unavailable, if any
-	    this.icon = attrs.icon;                     // Optional - shows 'iD-icon-wrench' if not set
-	    this.entityIds = attrs.entityIds || [];     // Optional - used for hover-higlighting.
-	    this.autoArgs = attrs.autoArgs;             // Optional - pass [actions, annotation] arglist if this fix can automatically run
+	          if (c === 37) {
+	            result.push(parseInt(text.substr(i, 2), 16));
+	            i += 2; // otherwise, just the actual byte
+	          } else {
+	            result.push(c);
+	          }
+	        }
 
-	    this.issue = null;    // Generated link - added by validationIssue
-	}
+	        return coerceArray(result);
+	      }
 
-	var buildRuleChecks = function() {
-	    return {
-	        equals: function (equals) {
-	            return function(tags) {
-	                return Object.keys(equals).every(function(k) {
-	                    return equals[k] === tags[k];
-	                });
-	            };
-	        },
-	        notEquals: function (notEquals) {
-	            return function(tags) {
-	                return Object.keys(notEquals).some(function(k) {
-	                    return notEquals[k] !== tags[k];
-	                });
-	            };
-	        },
-	        absence: function(absence) {
-	            return function(tags) {
-	                return Object.keys(tags).indexOf(absence) === -1;
-	            };
-	        },
-	        presence: function(presence) {
-	            return function(tags) {
-	                return Object.keys(tags).indexOf(presence) > -1;
-	            };
-	        },
-	        greaterThan: function(greaterThan) {
-	            var key = Object.keys(greaterThan)[0];
-	            var value = greaterThan[key];
+	      function fromBytes(bytes) {
+	        var result = [],
+	            i = 0;
 
-	            return function(tags) {
-	                return tags[key] > value;
-	            };
-	        },
-	        greaterThanEqual: function(greaterThanEqual) {
-	            var key = Object.keys(greaterThanEqual)[0];
-	            var value = greaterThanEqual[key];
+	        while (i < bytes.length) {
+	          var c = bytes[i];
 
-	            return function(tags) {
-	                return tags[key] >= value;
-	            };
-	        },
-	        lessThan: function(lessThan) {
-	            var key = Object.keys(lessThan)[0];
-	            var value = lessThan[key];
+	          if (c < 128) {
+	            result.push(String.fromCharCode(c));
+	            i++;
+	          } else if (c > 191 && c < 224) {
+	            result.push(String.fromCharCode((c & 0x1f) << 6 | bytes[i + 1] & 0x3f));
+	            i += 2;
+	          } else {
+	            result.push(String.fromCharCode((c & 0x0f) << 12 | (bytes[i + 1] & 0x3f) << 6 | bytes[i + 2] & 0x3f));
+	            i += 3;
+	          }
+	        }
 
-	            return function(tags) {
-	                return tags[key] < value;
-	            };
-	        },
-	        lessThanEqual: function(lessThanEqual) {
-	            var key = Object.keys(lessThanEqual)[0];
-	            var value = lessThanEqual[key];
+	        return result.join('');
+	      }
 
-	            return function(tags) {
-	                return tags[key] <= value;
-	            };
-	        },
-	        positiveRegex: function(positiveRegex) {
-	            var tagKey = Object.keys(positiveRegex)[0];
-	            var expression = positiveRegex[tagKey].join('|');
-	            var regex = new RegExp(expression);
+	      return {
+	        toBytes: toBytes,
+	        fromBytes: fromBytes
+	      };
+	    }();
 
-	            return function(tags) {
-	                return regex.test(tags[tagKey]);
-	            };
-	        },
-	        negativeRegex: function(negativeRegex) {
-	            var tagKey = Object.keys(negativeRegex)[0];
-	            var expression = negativeRegex[tagKey].join('|');
-	            var regex = new RegExp(expression);
+	    var convertHex = function () {
+	      function toBytes(text) {
+	        var result = [];
 
-	            return function(tags) {
-	                return !regex.test(tags[tagKey]);
-	            };
+	        for (var i = 0; i < text.length; i += 2) {
+	          result.push(parseInt(text.substr(i, 2), 16));
 	        }
-	    };
-	};
 
-	var buildLineKeys = function() {
-	    return {
-	        highway: {
-	            rest_area: true,
-	            services: true
-	        },
-	        railway: {
-	            roundhouse: true,
-	            station: true,
-	            traverser: true,
-	            turntable: true,
-	            wash: true
-	        }
-	    };
-	};
+	        return result;
+	      } // http://ixti.net/development/javascript/2011/11/11/base64-encodedecode-of-utf8-in-browser-with-js.html
 
-	var serviceMapRules = {
-	    init: function() {
-	        this._ruleChecks  = buildRuleChecks();
-	        this._validationRules = [];
-	        this._areaKeys = osmAreaKeys;
-	        this._lineKeys = buildLineKeys();
-	    },
 
-	    // list of rules only relevant to tag checks...
-	    filterRuleChecks: function(selector) {
-	        var _ruleChecks = this._ruleChecks;
-	        return Object.keys(selector).reduce(function(rules, key) {
-	            if (['geometry', 'error', 'warning'].indexOf(key) === -1) {
-	                rules.push(_ruleChecks[key](selector[key]));
-	            }
-	            return rules;
-	        }, []);
-	    },
+	      var Hex = '0123456789abcdef';
 
-	    // builds tagMap from mapcss-parse selector object...
-	    buildTagMap: function(selector) {
-	        var getRegexValues = function(regexes) {
-	            return regexes.map(function(regex) {
-	                return regex.replace(/\$|\^/g, '');
-	            });
-	        };
+	      function fromBytes(bytes) {
+	        var result = [];
 
-	        var tagMap = Object.keys(selector).reduce(function (expectedTags, key) {
-	            var values;
-	            var isRegex = /regex/gi.test(key);
-	            var isEqual = /equals/gi.test(key);
+	        for (var i = 0; i < bytes.length; i++) {
+	          var v = bytes[i];
+	          result.push(Hex[(v & 0xf0) >> 4] + Hex[v & 0x0f]);
+	        }
 
-	            if (isRegex || isEqual) {
-	                Object.keys(selector[key]).forEach(function(selectorKey) {
-	                    values = isEqual ? [selector[key][selectorKey]] : getRegexValues(selector[key][selectorKey]);
+	        return result.join('');
+	      }
 
-	                    if (expectedTags.hasOwnProperty(selectorKey)) {
-	                        values = values.concat(expectedTags[selectorKey]);
-	                    }
+	      return {
+	        toBytes: toBytes,
+	        fromBytes: fromBytes
+	      };
+	    }(); // Number of rounds by keysize
 
-	                    expectedTags[selectorKey] = values;
-	                });
 
-	            } else if (/(greater|less)Than(Equal)?|presence/g.test(key)) {
-	                var tagKey = /presence/.test(key) ? selector[key] : Object.keys(selector[key])[0];
+	    var numberOfRounds = {
+	      16: 10,
+	      24: 12,
+	      32: 14
+	    }; // Round constant words
 
-	                values = [selector[key][tagKey]];
+	    var rcon = [0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91]; // S-box and Inverse S-box (S is for Substitution)
 
-	                if (expectedTags.hasOwnProperty(tagKey)) {
-	                    values = values.concat(expectedTags[tagKey]);
-	                }
+	    var S = [0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16];
+	    var Si = [0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb, 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25, 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92, 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84, 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06, 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73, 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e, 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b, 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4, 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f, 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef, 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d]; // Transformations for encryption
 
-	                expectedTags[tagKey] = values;
-	            }
+	    var T1 = [0xc66363a5, 0xf87c7c84, 0xee777799, 0xf67b7b8d, 0xfff2f20d, 0xd66b6bbd, 0xde6f6fb1, 0x91c5c554, 0x60303050, 0x02010103, 0xce6767a9, 0x562b2b7d, 0xe7fefe19, 0xb5d7d762, 0x4dababe6, 0xec76769a, 0x8fcaca45, 0x1f82829d, 0x89c9c940, 0xfa7d7d87, 0xeffafa15, 0xb25959eb, 0x8e4747c9, 0xfbf0f00b, 0x41adadec, 0xb3d4d467, 0x5fa2a2fd, 0x45afafea, 0x239c9cbf, 0x53a4a4f7, 0xe4727296, 0x9bc0c05b, 0x75b7b7c2, 0xe1fdfd1c, 0x3d9393ae, 0x4c26266a, 0x6c36365a, 0x7e3f3f41, 0xf5f7f702, 0x83cccc4f, 0x6834345c, 0x51a5a5f4, 0xd1e5e534, 0xf9f1f108, 0xe2717193, 0xabd8d873, 0x62313153, 0x2a15153f, 0x0804040c, 0x95c7c752, 0x46232365, 0x9dc3c35e, 0x30181828, 0x379696a1, 0x0a05050f, 0x2f9a9ab5, 0x0e070709, 0x24121236, 0x1b80809b, 0xdfe2e23d, 0xcdebeb26, 0x4e272769, 0x7fb2b2cd, 0xea75759f, 0x1209091b, 0x1d83839e, 0x582c2c74, 0x341a1a2e, 0x361b1b2d, 0xdc6e6eb2, 0xb45a5aee, 0x5ba0a0fb, 0xa45252f6, 0x763b3b4d, 0xb7d6d661, 0x7db3b3ce, 0x5229297b, 0xdde3e33e, 0x5e2f2f71, 0x13848497, 0xa65353f5, 0xb9d1d168, 0x00000000, 0xc1eded2c, 0x40202060, 0xe3fcfc1f, 0x79b1b1c8, 0xb65b5bed, 0xd46a6abe, 0x8dcbcb46, 0x67bebed9, 0x7239394b, 0x944a4ade, 0x984c4cd4, 0xb05858e8, 0x85cfcf4a, 0xbbd0d06b, 0xc5efef2a, 0x4faaaae5, 0xedfbfb16, 0x864343c5, 0x9a4d4dd7, 0x66333355, 0x11858594, 0x8a4545cf, 0xe9f9f910, 0x04020206, 0xfe7f7f81, 0xa05050f0, 0x783c3c44, 0x259f9fba, 0x4ba8a8e3, 0xa25151f3, 0x5da3a3fe, 0x804040c0, 0x058f8f8a, 0x3f9292ad, 0x219d9dbc, 0x70383848, 0xf1f5f504, 0x63bcbcdf, 0x77b6b6c1, 0xafdada75, 0x42212163, 0x20101030, 0xe5ffff1a, 0xfdf3f30e, 0xbfd2d26d, 0x81cdcd4c, 0x180c0c14, 0x26131335, 0xc3ecec2f, 0xbe5f5fe1, 0x359797a2, 0x884444cc, 0x2e171739, 0x93c4c457, 0x55a7a7f2, 0xfc7e7e82, 0x7a3d3d47, 0xc86464ac, 0xba5d5de7, 0x3219192b, 0xe6737395, 0xc06060a0, 0x19818198, 0x9e4f4fd1, 0xa3dcdc7f, 0x44222266, 0x542a2a7e, 0x3b9090ab, 0x0b888883, 0x8c4646ca, 0xc7eeee29, 0x6bb8b8d3, 0x2814143c, 0xa7dede79, 0xbc5e5ee2, 0x160b0b1d, 0xaddbdb76, 0xdbe0e03b, 0x64323256, 0x743a3a4e, 0x140a0a1e, 0x924949db, 0x0c06060a, 0x4824246c, 0xb85c5ce4, 0x9fc2c25d, 0xbdd3d36e, 0x43acacef, 0xc46262a6, 0x399191a8, 0x319595a4, 0xd3e4e437, 0xf279798b, 0xd5e7e732, 0x8bc8c843, 0x6e373759, 0xda6d6db7, 0x018d8d8c, 0xb1d5d564, 0x9c4e4ed2, 0x49a9a9e0, 0xd86c6cb4, 0xac5656fa, 0xf3f4f407, 0xcfeaea25, 0xca6565af, 0xf47a7a8e, 0x47aeaee9, 0x10080818, 0x6fbabad5, 0xf0787888, 0x4a25256f, 0x5c2e2e72, 0x381c1c24, 0x57a6a6f1, 0x73b4b4c7, 0x97c6c651, 0xcbe8e823, 0xa1dddd7c, 0xe874749c, 0x3e1f1f21, 0x964b4bdd, 0x61bdbddc, 0x0d8b8b86, 0x0f8a8a85, 0xe0707090, 0x7c3e3e42, 0x71b5b5c4, 0xcc6666aa, 0x904848d8, 0x06030305, 0xf7f6f601, 0x1c0e0e12, 0xc26161a3, 0x6a35355f, 0xae5757f9, 0x69b9b9d0, 0x17868691, 0x99c1c158, 0x3a1d1d27, 0x279e9eb9, 0xd9e1e138, 0xebf8f813, 0x2b9898b3, 0x22111133, 0xd26969bb, 0xa9d9d970, 0x078e8e89, 0x339494a7, 0x2d9b9bb6, 0x3c1e1e22, 0x15878792, 0xc9e9e920, 0x87cece49, 0xaa5555ff, 0x50282878, 0xa5dfdf7a, 0x038c8c8f, 0x59a1a1f8, 0x09898980, 0x1a0d0d17, 0x65bfbfda, 0xd7e6e631, 0x844242c6, 0xd06868b8, 0x824141c3, 0x299999b0, 0x5a2d2d77, 0x1e0f0f11, 0x7bb0b0cb, 0xa85454fc, 0x6dbbbbd6, 0x2c16163a];
+	    var T2 = [0xa5c66363, 0x84f87c7c, 0x99ee7777, 0x8df67b7b, 0x0dfff2f2, 0xbdd66b6b, 0xb1de6f6f, 0x5491c5c5, 0x50603030, 0x03020101, 0xa9ce6767, 0x7d562b2b, 0x19e7fefe, 0x62b5d7d7, 0xe64dabab, 0x9aec7676, 0x458fcaca, 0x9d1f8282, 0x4089c9c9, 0x87fa7d7d, 0x15effafa, 0xebb25959, 0xc98e4747, 0x0bfbf0f0, 0xec41adad, 0x67b3d4d4, 0xfd5fa2a2, 0xea45afaf, 0xbf239c9c, 0xf753a4a4, 0x96e47272, 0x5b9bc0c0, 0xc275b7b7, 0x1ce1fdfd, 0xae3d9393, 0x6a4c2626, 0x5a6c3636, 0x417e3f3f, 0x02f5f7f7, 0x4f83cccc, 0x5c683434, 0xf451a5a5, 0x34d1e5e5, 0x08f9f1f1, 0x93e27171, 0x73abd8d8, 0x53623131, 0x3f2a1515, 0x0c080404, 0x5295c7c7, 0x65462323, 0x5e9dc3c3, 0x28301818, 0xa1379696, 0x0f0a0505, 0xb52f9a9a, 0x090e0707, 0x36241212, 0x9b1b8080, 0x3ddfe2e2, 0x26cdebeb, 0x694e2727, 0xcd7fb2b2, 0x9fea7575, 0x1b120909, 0x9e1d8383, 0x74582c2c, 0x2e341a1a, 0x2d361b1b, 0xb2dc6e6e, 0xeeb45a5a, 0xfb5ba0a0, 0xf6a45252, 0x4d763b3b, 0x61b7d6d6, 0xce7db3b3, 0x7b522929, 0x3edde3e3, 0x715e2f2f, 0x97138484, 0xf5a65353, 0x68b9d1d1, 0x00000000, 0x2cc1eded, 0x60402020, 0x1fe3fcfc, 0xc879b1b1, 0xedb65b5b, 0xbed46a6a, 0x468dcbcb, 0xd967bebe, 0x4b723939, 0xde944a4a, 0xd4984c4c, 0xe8b05858, 0x4a85cfcf, 0x6bbbd0d0, 0x2ac5efef, 0xe54faaaa, 0x16edfbfb, 0xc5864343, 0xd79a4d4d, 0x55663333, 0x94118585, 0xcf8a4545, 0x10e9f9f9, 0x06040202, 0x81fe7f7f, 0xf0a05050, 0x44783c3c, 0xba259f9f, 0xe34ba8a8, 0xf3a25151, 0xfe5da3a3, 0xc0804040, 0x8a058f8f, 0xad3f9292, 0xbc219d9d, 0x48703838, 0x04f1f5f5, 0xdf63bcbc, 0xc177b6b6, 0x75afdada, 0x63422121, 0x30201010, 0x1ae5ffff, 0x0efdf3f3, 0x6dbfd2d2, 0x4c81cdcd, 0x14180c0c, 0x35261313, 0x2fc3ecec, 0xe1be5f5f, 0xa2359797, 0xcc884444, 0x392e1717, 0x5793c4c4, 0xf255a7a7, 0x82fc7e7e, 0x477a3d3d, 0xacc86464, 0xe7ba5d5d, 0x2b321919, 0x95e67373, 0xa0c06060, 0x98198181, 0xd19e4f4f, 0x7fa3dcdc, 0x66442222, 0x7e542a2a, 0xab3b9090, 0x830b8888, 0xca8c4646, 0x29c7eeee, 0xd36bb8b8, 0x3c281414, 0x79a7dede, 0xe2bc5e5e, 0x1d160b0b, 0x76addbdb, 0x3bdbe0e0, 0x56643232, 0x4e743a3a, 0x1e140a0a, 0xdb924949, 0x0a0c0606, 0x6c482424, 0xe4b85c5c, 0x5d9fc2c2, 0x6ebdd3d3, 0xef43acac, 0xa6c46262, 0xa8399191, 0xa4319595, 0x37d3e4e4, 0x8bf27979, 0x32d5e7e7, 0x438bc8c8, 0x596e3737, 0xb7da6d6d, 0x8c018d8d, 0x64b1d5d5, 0xd29c4e4e, 0xe049a9a9, 0xb4d86c6c, 0xfaac5656, 0x07f3f4f4, 0x25cfeaea, 0xafca6565, 0x8ef47a7a, 0xe947aeae, 0x18100808, 0xd56fbaba, 0x88f07878, 0x6f4a2525, 0x725c2e2e, 0x24381c1c, 0xf157a6a6, 0xc773b4b4, 0x5197c6c6, 0x23cbe8e8, 0x7ca1dddd, 0x9ce87474, 0x213e1f1f, 0xdd964b4b, 0xdc61bdbd, 0x860d8b8b, 0x850f8a8a, 0x90e07070, 0x427c3e3e, 0xc471b5b5, 0xaacc6666, 0xd8904848, 0x05060303, 0x01f7f6f6, 0x121c0e0e, 0xa3c26161, 0x5f6a3535, 0xf9ae5757, 0xd069b9b9, 0x91178686, 0x5899c1c1, 0x273a1d1d, 0xb9279e9e, 0x38d9e1e1, 0x13ebf8f8, 0xb32b9898, 0x33221111, 0xbbd26969, 0x70a9d9d9, 0x89078e8e, 0xa7339494, 0xb62d9b9b, 0x223c1e1e, 0x92158787, 0x20c9e9e9, 0x4987cece, 0xffaa5555, 0x78502828, 0x7aa5dfdf, 0x8f038c8c, 0xf859a1a1, 0x80098989, 0x171a0d0d, 0xda65bfbf, 0x31d7e6e6, 0xc6844242, 0xb8d06868, 0xc3824141, 0xb0299999, 0x775a2d2d, 0x111e0f0f, 0xcb7bb0b0, 0xfca85454, 0xd66dbbbb, 0x3a2c1616];
+	    var T3 = [0x63a5c663, 0x7c84f87c, 0x7799ee77, 0x7b8df67b, 0xf20dfff2, 0x6bbdd66b, 0x6fb1de6f, 0xc55491c5, 0x30506030, 0x01030201, 0x67a9ce67, 0x2b7d562b, 0xfe19e7fe, 0xd762b5d7, 0xabe64dab, 0x769aec76, 0xca458fca, 0x829d1f82, 0xc94089c9, 0x7d87fa7d, 0xfa15effa, 0x59ebb259, 0x47c98e47, 0xf00bfbf0, 0xadec41ad, 0xd467b3d4, 0xa2fd5fa2, 0xafea45af, 0x9cbf239c, 0xa4f753a4, 0x7296e472, 0xc05b9bc0, 0xb7c275b7, 0xfd1ce1fd, 0x93ae3d93, 0x266a4c26, 0x365a6c36, 0x3f417e3f, 0xf702f5f7, 0xcc4f83cc, 0x345c6834, 0xa5f451a5, 0xe534d1e5, 0xf108f9f1, 0x7193e271, 0xd873abd8, 0x31536231, 0x153f2a15, 0x040c0804, 0xc75295c7, 0x23654623, 0xc35e9dc3, 0x18283018, 0x96a13796, 0x050f0a05, 0x9ab52f9a, 0x07090e07, 0x12362412, 0x809b1b80, 0xe23ddfe2, 0xeb26cdeb, 0x27694e27, 0xb2cd7fb2, 0x759fea75, 0x091b1209, 0x839e1d83, 0x2c74582c, 0x1a2e341a, 0x1b2d361b, 0x6eb2dc6e, 0x5aeeb45a, 0xa0fb5ba0, 0x52f6a452, 0x3b4d763b, 0xd661b7d6, 0xb3ce7db3, 0x297b5229, 0xe33edde3, 0x2f715e2f, 0x84971384, 0x53f5a653, 0xd168b9d1, 0x00000000, 0xed2cc1ed, 0x20604020, 0xfc1fe3fc, 0xb1c879b1, 0x5bedb65b, 0x6abed46a, 0xcb468dcb, 0xbed967be, 0x394b7239, 0x4ade944a, 0x4cd4984c, 0x58e8b058, 0xcf4a85cf, 0xd06bbbd0, 0xef2ac5ef, 0xaae54faa, 0xfb16edfb, 0x43c58643, 0x4dd79a4d, 0x33556633, 0x85941185, 0x45cf8a45, 0xf910e9f9, 0x02060402, 0x7f81fe7f, 0x50f0a050, 0x3c44783c, 0x9fba259f, 0xa8e34ba8, 0x51f3a251, 0xa3fe5da3, 0x40c08040, 0x8f8a058f, 0x92ad3f92, 0x9dbc219d, 0x38487038, 0xf504f1f5, 0xbcdf63bc, 0xb6c177b6, 0xda75afda, 0x21634221, 0x10302010, 0xff1ae5ff, 0xf30efdf3, 0xd26dbfd2, 0xcd4c81cd, 0x0c14180c, 0x13352613, 0xec2fc3ec, 0x5fe1be5f, 0x97a23597, 0x44cc8844, 0x17392e17, 0xc45793c4, 0xa7f255a7, 0x7e82fc7e, 0x3d477a3d, 0x64acc864, 0x5de7ba5d, 0x192b3219, 0x7395e673, 0x60a0c060, 0x81981981, 0x4fd19e4f, 0xdc7fa3dc, 0x22664422, 0x2a7e542a, 0x90ab3b90, 0x88830b88, 0x46ca8c46, 0xee29c7ee, 0xb8d36bb8, 0x143c2814, 0xde79a7de, 0x5ee2bc5e, 0x0b1d160b, 0xdb76addb, 0xe03bdbe0, 0x32566432, 0x3a4e743a, 0x0a1e140a, 0x49db9249, 0x060a0c06, 0x246c4824, 0x5ce4b85c, 0xc25d9fc2, 0xd36ebdd3, 0xacef43ac, 0x62a6c462, 0x91a83991, 0x95a43195, 0xe437d3e4, 0x798bf279, 0xe732d5e7, 0xc8438bc8, 0x37596e37, 0x6db7da6d, 0x8d8c018d, 0xd564b1d5, 0x4ed29c4e, 0xa9e049a9, 0x6cb4d86c, 0x56faac56, 0xf407f3f4, 0xea25cfea, 0x65afca65, 0x7a8ef47a, 0xaee947ae, 0x08181008, 0xbad56fba, 0x7888f078, 0x256f4a25, 0x2e725c2e, 0x1c24381c, 0xa6f157a6, 0xb4c773b4, 0xc65197c6, 0xe823cbe8, 0xdd7ca1dd, 0x749ce874, 0x1f213e1f, 0x4bdd964b, 0xbddc61bd, 0x8b860d8b, 0x8a850f8a, 0x7090e070, 0x3e427c3e, 0xb5c471b5, 0x66aacc66, 0x48d89048, 0x03050603, 0xf601f7f6, 0x0e121c0e, 0x61a3c261, 0x355f6a35, 0x57f9ae57, 0xb9d069b9, 0x86911786, 0xc15899c1, 0x1d273a1d, 0x9eb9279e, 0xe138d9e1, 0xf813ebf8, 0x98b32b98, 0x11332211, 0x69bbd269, 0xd970a9d9, 0x8e89078e, 0x94a73394, 0x9bb62d9b, 0x1e223c1e, 0x87921587, 0xe920c9e9, 0xce4987ce, 0x55ffaa55, 0x28785028, 0xdf7aa5df, 0x8c8f038c, 0xa1f859a1, 0x89800989, 0x0d171a0d, 0xbfda65bf, 0xe631d7e6, 0x42c68442, 0x68b8d068, 0x41c38241, 0x99b02999, 0x2d775a2d, 0x0f111e0f, 0xb0cb7bb0, 0x54fca854, 0xbbd66dbb, 0x163a2c16];
+	    var T4 = [0x6363a5c6, 0x7c7c84f8, 0x777799ee, 0x7b7b8df6, 0xf2f20dff, 0x6b6bbdd6, 0x6f6fb1de, 0xc5c55491, 0x30305060, 0x01010302, 0x6767a9ce, 0x2b2b7d56, 0xfefe19e7, 0xd7d762b5, 0xababe64d, 0x76769aec, 0xcaca458f, 0x82829d1f, 0xc9c94089, 0x7d7d87fa, 0xfafa15ef, 0x5959ebb2, 0x4747c98e, 0xf0f00bfb, 0xadadec41, 0xd4d467b3, 0xa2a2fd5f, 0xafafea45, 0x9c9cbf23, 0xa4a4f753, 0x727296e4, 0xc0c05b9b, 0xb7b7c275, 0xfdfd1ce1, 0x9393ae3d, 0x26266a4c, 0x36365a6c, 0x3f3f417e, 0xf7f702f5, 0xcccc4f83, 0x34345c68, 0xa5a5f451, 0xe5e534d1, 0xf1f108f9, 0x717193e2, 0xd8d873ab, 0x31315362, 0x15153f2a, 0x04040c08, 0xc7c75295, 0x23236546, 0xc3c35e9d, 0x18182830, 0x9696a137, 0x05050f0a, 0x9a9ab52f, 0x0707090e, 0x12123624, 0x80809b1b, 0xe2e23ddf, 0xebeb26cd, 0x2727694e, 0xb2b2cd7f, 0x75759fea, 0x09091b12, 0x83839e1d, 0x2c2c7458, 0x1a1a2e34, 0x1b1b2d36, 0x6e6eb2dc, 0x5a5aeeb4, 0xa0a0fb5b, 0x5252f6a4, 0x3b3b4d76, 0xd6d661b7, 0xb3b3ce7d, 0x29297b52, 0xe3e33edd, 0x2f2f715e, 0x84849713, 0x5353f5a6, 0xd1d168b9, 0x00000000, 0xeded2cc1, 0x20206040, 0xfcfc1fe3, 0xb1b1c879, 0x5b5bedb6, 0x6a6abed4, 0xcbcb468d, 0xbebed967, 0x39394b72, 0x4a4ade94, 0x4c4cd498, 0x5858e8b0, 0xcfcf4a85, 0xd0d06bbb, 0xefef2ac5, 0xaaaae54f, 0xfbfb16ed, 0x4343c586, 0x4d4dd79a, 0x33335566, 0x85859411, 0x4545cf8a, 0xf9f910e9, 0x02020604, 0x7f7f81fe, 0x5050f0a0, 0x3c3c4478, 0x9f9fba25, 0xa8a8e34b, 0x5151f3a2, 0xa3a3fe5d, 0x4040c080, 0x8f8f8a05, 0x9292ad3f, 0x9d9dbc21, 0x38384870, 0xf5f504f1, 0xbcbcdf63, 0xb6b6c177, 0xdada75af, 0x21216342, 0x10103020, 0xffff1ae5, 0xf3f30efd, 0xd2d26dbf, 0xcdcd4c81, 0x0c0c1418, 0x13133526, 0xecec2fc3, 0x5f5fe1be, 0x9797a235, 0x4444cc88, 0x1717392e, 0xc4c45793, 0xa7a7f255, 0x7e7e82fc, 0x3d3d477a, 0x6464acc8, 0x5d5de7ba, 0x19192b32, 0x737395e6, 0x6060a0c0, 0x81819819, 0x4f4fd19e, 0xdcdc7fa3, 0x22226644, 0x2a2a7e54, 0x9090ab3b, 0x8888830b, 0x4646ca8c, 0xeeee29c7, 0xb8b8d36b, 0x14143c28, 0xdede79a7, 0x5e5ee2bc, 0x0b0b1d16, 0xdbdb76ad, 0xe0e03bdb, 0x32325664, 0x3a3a4e74, 0x0a0a1e14, 0x4949db92, 0x06060a0c, 0x24246c48, 0x5c5ce4b8, 0xc2c25d9f, 0xd3d36ebd, 0xacacef43, 0x6262a6c4, 0x9191a839, 0x9595a431, 0xe4e437d3, 0x79798bf2, 0xe7e732d5, 0xc8c8438b, 0x3737596e, 0x6d6db7da, 0x8d8d8c01, 0xd5d564b1, 0x4e4ed29c, 0xa9a9e049, 0x6c6cb4d8, 0x5656faac, 0xf4f407f3, 0xeaea25cf, 0x6565afca, 0x7a7a8ef4, 0xaeaee947, 0x08081810, 0xbabad56f, 0x787888f0, 0x25256f4a, 0x2e2e725c, 0x1c1c2438, 0xa6a6f157, 0xb4b4c773, 0xc6c65197, 0xe8e823cb, 0xdddd7ca1, 0x74749ce8, 0x1f1f213e, 0x4b4bdd96, 0xbdbddc61, 0x8b8b860d, 0x8a8a850f, 0x707090e0, 0x3e3e427c, 0xb5b5c471, 0x6666aacc, 0x4848d890, 0x03030506, 0xf6f601f7, 0x0e0e121c, 0x6161a3c2, 0x35355f6a, 0x5757f9ae, 0xb9b9d069, 0x86869117, 0xc1c15899, 0x1d1d273a, 0x9e9eb927, 0xe1e138d9, 0xf8f813eb, 0x9898b32b, 0x11113322, 0x6969bbd2, 0xd9d970a9, 0x8e8e8907, 0x9494a733, 0x9b9bb62d, 0x1e1e223c, 0x87879215, 0xe9e920c9, 0xcece4987, 0x5555ffaa, 0x28287850, 0xdfdf7aa5, 0x8c8c8f03, 0xa1a1f859, 0x89898009, 0x0d0d171a, 0xbfbfda65, 0xe6e631d7, 0x4242c684, 0x6868b8d0, 0x4141c382, 0x9999b029, 0x2d2d775a, 0x0f0f111e, 0xb0b0cb7b, 0x5454fca8, 0xbbbbd66d, 0x16163a2c]; // Transformations for decryption
 
-	            return expectedTags;
-	        }, {});
+	    var T5 = [0x51f4a750, 0x7e416553, 0x1a17a4c3, 0x3a275e96, 0x3bab6bcb, 0x1f9d45f1, 0xacfa58ab, 0x4be30393, 0x2030fa55, 0xad766df6, 0x88cc7691, 0xf5024c25, 0x4fe5d7fc, 0xc52acbd7, 0x26354480, 0xb562a38f, 0xdeb15a49, 0x25ba1b67, 0x45ea0e98, 0x5dfec0e1, 0xc32f7502, 0x814cf012, 0x8d4697a3, 0x6bd3f9c6, 0x038f5fe7, 0x15929c95, 0xbf6d7aeb, 0x955259da, 0xd4be832d, 0x587421d3, 0x49e06929, 0x8ec9c844, 0x75c2896a, 0xf48e7978, 0x99583e6b, 0x27b971dd, 0xbee14fb6, 0xf088ad17, 0xc920ac66, 0x7dce3ab4, 0x63df4a18, 0xe51a3182, 0x97513360, 0x62537f45, 0xb16477e0, 0xbb6bae84, 0xfe81a01c, 0xf9082b94, 0x70486858, 0x8f45fd19, 0x94de6c87, 0x527bf8b7, 0xab73d323, 0x724b02e2, 0xe31f8f57, 0x6655ab2a, 0xb2eb2807, 0x2fb5c203, 0x86c57b9a, 0xd33708a5, 0x302887f2, 0x23bfa5b2, 0x02036aba, 0xed16825c, 0x8acf1c2b, 0xa779b492, 0xf307f2f0, 0x4e69e2a1, 0x65daf4cd, 0x0605bed5, 0xd134621f, 0xc4a6fe8a, 0x342e539d, 0xa2f355a0, 0x058ae132, 0xa4f6eb75, 0x0b83ec39, 0x4060efaa, 0x5e719f06, 0xbd6e1051, 0x3e218af9, 0x96dd063d, 0xdd3e05ae, 0x4de6bd46, 0x91548db5, 0x71c45d05, 0x0406d46f, 0x605015ff, 0x1998fb24, 0xd6bde997, 0x894043cc, 0x67d99e77, 0xb0e842bd, 0x07898b88, 0xe7195b38, 0x79c8eedb, 0xa17c0a47, 0x7c420fe9, 0xf8841ec9, 0x00000000, 0x09808683, 0x322bed48, 0x1e1170ac, 0x6c5a724e, 0xfd0efffb, 0x0f853856, 0x3daed51e, 0x362d3927, 0x0a0fd964, 0x685ca621, 0x9b5b54d1, 0x24362e3a, 0x0c0a67b1, 0x9357e70f, 0xb4ee96d2, 0x1b9b919e, 0x80c0c54f, 0x61dc20a2, 0x5a774b69, 0x1c121a16, 0xe293ba0a, 0xc0a02ae5, 0x3c22e043, 0x121b171d, 0x0e090d0b, 0xf28bc7ad, 0x2db6a8b9, 0x141ea9c8, 0x57f11985, 0xaf75074c, 0xee99ddbb, 0xa37f60fd, 0xf701269f, 0x5c72f5bc, 0x44663bc5, 0x5bfb7e34, 0x8b432976, 0xcb23c6dc, 0xb6edfc68, 0xb8e4f163, 0xd731dcca, 0x42638510, 0x13972240, 0x84c61120, 0x854a247d, 0xd2bb3df8, 0xaef93211, 0xc729a16d, 0x1d9e2f4b, 0xdcb230f3, 0x0d8652ec, 0x77c1e3d0, 0x2bb3166c, 0xa970b999, 0x119448fa, 0x47e96422, 0xa8fc8cc4, 0xa0f03f1a, 0x567d2cd8, 0x223390ef, 0x87494ec7, 0xd938d1c1, 0x8ccaa2fe, 0x98d40b36, 0xa6f581cf, 0xa57ade28, 0xdab78e26, 0x3fadbfa4, 0x2c3a9de4, 0x5078920d, 0x6a5fcc9b, 0x547e4662, 0xf68d13c2, 0x90d8b8e8, 0x2e39f75e, 0x82c3aff5, 0x9f5d80be, 0x69d0937c, 0x6fd52da9, 0xcf2512b3, 0xc8ac993b, 0x10187da7, 0xe89c636e, 0xdb3bbb7b, 0xcd267809, 0x6e5918f4, 0xec9ab701, 0x834f9aa8, 0xe6956e65, 0xaaffe67e, 0x21bccf08, 0xef15e8e6, 0xbae79bd9, 0x4a6f36ce, 0xea9f09d4, 0x29b07cd6, 0x31a4b2af, 0x2a3f2331, 0xc6a59430, 0x35a266c0, 0x744ebc37, 0xfc82caa6, 0xe090d0b0, 0x33a7d815, 0xf104984a, 0x41ecdaf7, 0x7fcd500e, 0x1791f62f, 0x764dd68d, 0x43efb04d, 0xccaa4d54, 0xe49604df, 0x9ed1b5e3, 0x4c6a881b, 0xc12c1fb8, 0x4665517f, 0x9d5eea04, 0x018c355d, 0xfa877473, 0xfb0b412e, 0xb3671d5a, 0x92dbd252, 0xe9105633, 0x6dd64713, 0x9ad7618c, 0x37a10c7a, 0x59f8148e, 0xeb133c89, 0xcea927ee, 0xb761c935, 0xe11ce5ed, 0x7a47b13c, 0x9cd2df59, 0x55f2733f, 0x1814ce79, 0x73c737bf, 0x53f7cdea, 0x5ffdaa5b, 0xdf3d6f14, 0x7844db86, 0xcaaff381, 0xb968c43e, 0x3824342c, 0xc2a3405f, 0x161dc372, 0xbce2250c, 0x283c498b, 0xff0d9541, 0x39a80171, 0x080cb3de, 0xd8b4e49c, 0x6456c190, 0x7bcb8461, 0xd532b670, 0x486c5c74, 0xd0b85742];
+	    var T6 = [0x5051f4a7, 0x537e4165, 0xc31a17a4, 0x963a275e, 0xcb3bab6b, 0xf11f9d45, 0xabacfa58, 0x934be303, 0x552030fa, 0xf6ad766d, 0x9188cc76, 0x25f5024c, 0xfc4fe5d7, 0xd7c52acb, 0x80263544, 0x8fb562a3, 0x49deb15a, 0x6725ba1b, 0x9845ea0e, 0xe15dfec0, 0x02c32f75, 0x12814cf0, 0xa38d4697, 0xc66bd3f9, 0xe7038f5f, 0x9515929c, 0xebbf6d7a, 0xda955259, 0x2dd4be83, 0xd3587421, 0x2949e069, 0x448ec9c8, 0x6a75c289, 0x78f48e79, 0x6b99583e, 0xdd27b971, 0xb6bee14f, 0x17f088ad, 0x66c920ac, 0xb47dce3a, 0x1863df4a, 0x82e51a31, 0x60975133, 0x4562537f, 0xe0b16477, 0x84bb6bae, 0x1cfe81a0, 0x94f9082b, 0x58704868, 0x198f45fd, 0x8794de6c, 0xb7527bf8, 0x23ab73d3, 0xe2724b02, 0x57e31f8f, 0x2a6655ab, 0x07b2eb28, 0x032fb5c2, 0x9a86c57b, 0xa5d33708, 0xf2302887, 0xb223bfa5, 0xba02036a, 0x5ced1682, 0x2b8acf1c, 0x92a779b4, 0xf0f307f2, 0xa14e69e2, 0xcd65daf4, 0xd50605be, 0x1fd13462, 0x8ac4a6fe, 0x9d342e53, 0xa0a2f355, 0x32058ae1, 0x75a4f6eb, 0x390b83ec, 0xaa4060ef, 0x065e719f, 0x51bd6e10, 0xf93e218a, 0x3d96dd06, 0xaedd3e05, 0x464de6bd, 0xb591548d, 0x0571c45d, 0x6f0406d4, 0xff605015, 0x241998fb, 0x97d6bde9, 0xcc894043, 0x7767d99e, 0xbdb0e842, 0x8807898b, 0x38e7195b, 0xdb79c8ee, 0x47a17c0a, 0xe97c420f, 0xc9f8841e, 0x00000000, 0x83098086, 0x48322bed, 0xac1e1170, 0x4e6c5a72, 0xfbfd0eff, 0x560f8538, 0x1e3daed5, 0x27362d39, 0x640a0fd9, 0x21685ca6, 0xd19b5b54, 0x3a24362e, 0xb10c0a67, 0x0f9357e7, 0xd2b4ee96, 0x9e1b9b91, 0x4f80c0c5, 0xa261dc20, 0x695a774b, 0x161c121a, 0x0ae293ba, 0xe5c0a02a, 0x433c22e0, 0x1d121b17, 0x0b0e090d, 0xadf28bc7, 0xb92db6a8, 0xc8141ea9, 0x8557f119, 0x4caf7507, 0xbbee99dd, 0xfda37f60, 0x9ff70126, 0xbc5c72f5, 0xc544663b, 0x345bfb7e, 0x768b4329, 0xdccb23c6, 0x68b6edfc, 0x63b8e4f1, 0xcad731dc, 0x10426385, 0x40139722, 0x2084c611, 0x7d854a24, 0xf8d2bb3d, 0x11aef932, 0x6dc729a1, 0x4b1d9e2f, 0xf3dcb230, 0xec0d8652, 0xd077c1e3, 0x6c2bb316, 0x99a970b9, 0xfa119448, 0x2247e964, 0xc4a8fc8c, 0x1aa0f03f, 0xd8567d2c, 0xef223390, 0xc787494e, 0xc1d938d1, 0xfe8ccaa2, 0x3698d40b, 0xcfa6f581, 0x28a57ade, 0x26dab78e, 0xa43fadbf, 0xe42c3a9d, 0x0d507892, 0x9b6a5fcc, 0x62547e46, 0xc2f68d13, 0xe890d8b8, 0x5e2e39f7, 0xf582c3af, 0xbe9f5d80, 0x7c69d093, 0xa96fd52d, 0xb3cf2512, 0x3bc8ac99, 0xa710187d, 0x6ee89c63, 0x7bdb3bbb, 0x09cd2678, 0xf46e5918, 0x01ec9ab7, 0xa8834f9a, 0x65e6956e, 0x7eaaffe6, 0x0821bccf, 0xe6ef15e8, 0xd9bae79b, 0xce4a6f36, 0xd4ea9f09, 0xd629b07c, 0xaf31a4b2, 0x312a3f23, 0x30c6a594, 0xc035a266, 0x37744ebc, 0xa6fc82ca, 0xb0e090d0, 0x1533a7d8, 0x4af10498, 0xf741ecda, 0x0e7fcd50, 0x2f1791f6, 0x8d764dd6, 0x4d43efb0, 0x54ccaa4d, 0xdfe49604, 0xe39ed1b5, 0x1b4c6a88, 0xb8c12c1f, 0x7f466551, 0x049d5eea, 0x5d018c35, 0x73fa8774, 0x2efb0b41, 0x5ab3671d, 0x5292dbd2, 0x33e91056, 0x136dd647, 0x8c9ad761, 0x7a37a10c, 0x8e59f814, 0x89eb133c, 0xeecea927, 0x35b761c9, 0xede11ce5, 0x3c7a47b1, 0x599cd2df, 0x3f55f273, 0x791814ce, 0xbf73c737, 0xea53f7cd, 0x5b5ffdaa, 0x14df3d6f, 0x867844db, 0x81caaff3, 0x3eb968c4, 0x2c382434, 0x5fc2a340, 0x72161dc3, 0x0cbce225, 0x8b283c49, 0x41ff0d95, 0x7139a801, 0xde080cb3, 0x9cd8b4e4, 0x906456c1, 0x617bcb84, 0x70d532b6, 0x74486c5c, 0x42d0b857];
+	    var T7 = [0xa75051f4, 0x65537e41, 0xa4c31a17, 0x5e963a27, 0x6bcb3bab, 0x45f11f9d, 0x58abacfa, 0x03934be3, 0xfa552030, 0x6df6ad76, 0x769188cc, 0x4c25f502, 0xd7fc4fe5, 0xcbd7c52a, 0x44802635, 0xa38fb562, 0x5a49deb1, 0x1b6725ba, 0x0e9845ea, 0xc0e15dfe, 0x7502c32f, 0xf012814c, 0x97a38d46, 0xf9c66bd3, 0x5fe7038f, 0x9c951592, 0x7aebbf6d, 0x59da9552, 0x832dd4be, 0x21d35874, 0x692949e0, 0xc8448ec9, 0x896a75c2, 0x7978f48e, 0x3e6b9958, 0x71dd27b9, 0x4fb6bee1, 0xad17f088, 0xac66c920, 0x3ab47dce, 0x4a1863df, 0x3182e51a, 0x33609751, 0x7f456253, 0x77e0b164, 0xae84bb6b, 0xa01cfe81, 0x2b94f908, 0x68587048, 0xfd198f45, 0x6c8794de, 0xf8b7527b, 0xd323ab73, 0x02e2724b, 0x8f57e31f, 0xab2a6655, 0x2807b2eb, 0xc2032fb5, 0x7b9a86c5, 0x08a5d337, 0x87f23028, 0xa5b223bf, 0x6aba0203, 0x825ced16, 0x1c2b8acf, 0xb492a779, 0xf2f0f307, 0xe2a14e69, 0xf4cd65da, 0xbed50605, 0x621fd134, 0xfe8ac4a6, 0x539d342e, 0x55a0a2f3, 0xe132058a, 0xeb75a4f6, 0xec390b83, 0xefaa4060, 0x9f065e71, 0x1051bd6e, 0x8af93e21, 0x063d96dd, 0x05aedd3e, 0xbd464de6, 0x8db59154, 0x5d0571c4, 0xd46f0406, 0x15ff6050, 0xfb241998, 0xe997d6bd, 0x43cc8940, 0x9e7767d9, 0x42bdb0e8, 0x8b880789, 0x5b38e719, 0xeedb79c8, 0x0a47a17c, 0x0fe97c42, 0x1ec9f884, 0x00000000, 0x86830980, 0xed48322b, 0x70ac1e11, 0x724e6c5a, 0xfffbfd0e, 0x38560f85, 0xd51e3dae, 0x3927362d, 0xd9640a0f, 0xa621685c, 0x54d19b5b, 0x2e3a2436, 0x67b10c0a, 0xe70f9357, 0x96d2b4ee, 0x919e1b9b, 0xc54f80c0, 0x20a261dc, 0x4b695a77, 0x1a161c12, 0xba0ae293, 0x2ae5c0a0, 0xe0433c22, 0x171d121b, 0x0d0b0e09, 0xc7adf28b, 0xa8b92db6, 0xa9c8141e, 0x198557f1, 0x074caf75, 0xddbbee99, 0x60fda37f, 0x269ff701, 0xf5bc5c72, 0x3bc54466, 0x7e345bfb, 0x29768b43, 0xc6dccb23, 0xfc68b6ed, 0xf163b8e4, 0xdccad731, 0x85104263, 0x22401397, 0x112084c6, 0x247d854a, 0x3df8d2bb, 0x3211aef9, 0xa16dc729, 0x2f4b1d9e, 0x30f3dcb2, 0x52ec0d86, 0xe3d077c1, 0x166c2bb3, 0xb999a970, 0x48fa1194, 0x642247e9, 0x8cc4a8fc, 0x3f1aa0f0, 0x2cd8567d, 0x90ef2233, 0x4ec78749, 0xd1c1d938, 0xa2fe8cca, 0x0b3698d4, 0x81cfa6f5, 0xde28a57a, 0x8e26dab7, 0xbfa43fad, 0x9de42c3a, 0x920d5078, 0xcc9b6a5f, 0x4662547e, 0x13c2f68d, 0xb8e890d8, 0xf75e2e39, 0xaff582c3, 0x80be9f5d, 0x937c69d0, 0x2da96fd5, 0x12b3cf25, 0x993bc8ac, 0x7da71018, 0x636ee89c, 0xbb7bdb3b, 0x7809cd26, 0x18f46e59, 0xb701ec9a, 0x9aa8834f, 0x6e65e695, 0xe67eaaff, 0xcf0821bc, 0xe8e6ef15, 0x9bd9bae7, 0x36ce4a6f, 0x09d4ea9f, 0x7cd629b0, 0xb2af31a4, 0x23312a3f, 0x9430c6a5, 0x66c035a2, 0xbc37744e, 0xcaa6fc82, 0xd0b0e090, 0xd81533a7, 0x984af104, 0xdaf741ec, 0x500e7fcd, 0xf62f1791, 0xd68d764d, 0xb04d43ef, 0x4d54ccaa, 0x04dfe496, 0xb5e39ed1, 0x881b4c6a, 0x1fb8c12c, 0x517f4665, 0xea049d5e, 0x355d018c, 0x7473fa87, 0x412efb0b, 0x1d5ab367, 0xd25292db, 0x5633e910, 0x47136dd6, 0x618c9ad7, 0x0c7a37a1, 0x148e59f8, 0x3c89eb13, 0x27eecea9, 0xc935b761, 0xe5ede11c, 0xb13c7a47, 0xdf599cd2, 0x733f55f2, 0xce791814, 0x37bf73c7, 0xcdea53f7, 0xaa5b5ffd, 0x6f14df3d, 0xdb867844, 0xf381caaf, 0xc43eb968, 0x342c3824, 0x405fc2a3, 0xc372161d, 0x250cbce2, 0x498b283c, 0x9541ff0d, 0x017139a8, 0xb3de080c, 0xe49cd8b4, 0xc1906456, 0x84617bcb, 0xb670d532, 0x5c74486c, 0x5742d0b8];
+	    var T8 = [0xf4a75051, 0x4165537e, 0x17a4c31a, 0x275e963a, 0xab6bcb3b, 0x9d45f11f, 0xfa58abac, 0xe303934b, 0x30fa5520, 0x766df6ad, 0xcc769188, 0x024c25f5, 0xe5d7fc4f, 0x2acbd7c5, 0x35448026, 0x62a38fb5, 0xb15a49de, 0xba1b6725, 0xea0e9845, 0xfec0e15d, 0x2f7502c3, 0x4cf01281, 0x4697a38d, 0xd3f9c66b, 0x8f5fe703, 0x929c9515, 0x6d7aebbf, 0x5259da95, 0xbe832dd4, 0x7421d358, 0xe0692949, 0xc9c8448e, 0xc2896a75, 0x8e7978f4, 0x583e6b99, 0xb971dd27, 0xe14fb6be, 0x88ad17f0, 0x20ac66c9, 0xce3ab47d, 0xdf4a1863, 0x1a3182e5, 0x51336097, 0x537f4562, 0x6477e0b1, 0x6bae84bb, 0x81a01cfe, 0x082b94f9, 0x48685870, 0x45fd198f, 0xde6c8794, 0x7bf8b752, 0x73d323ab, 0x4b02e272, 0x1f8f57e3, 0x55ab2a66, 0xeb2807b2, 0xb5c2032f, 0xc57b9a86, 0x3708a5d3, 0x2887f230, 0xbfa5b223, 0x036aba02, 0x16825ced, 0xcf1c2b8a, 0x79b492a7, 0x07f2f0f3, 0x69e2a14e, 0xdaf4cd65, 0x05bed506, 0x34621fd1, 0xa6fe8ac4, 0x2e539d34, 0xf355a0a2, 0x8ae13205, 0xf6eb75a4, 0x83ec390b, 0x60efaa40, 0x719f065e, 0x6e1051bd, 0x218af93e, 0xdd063d96, 0x3e05aedd, 0xe6bd464d, 0x548db591, 0xc45d0571, 0x06d46f04, 0x5015ff60, 0x98fb2419, 0xbde997d6, 0x4043cc89, 0xd99e7767, 0xe842bdb0, 0x898b8807, 0x195b38e7, 0xc8eedb79, 0x7c0a47a1, 0x420fe97c, 0x841ec9f8, 0x00000000, 0x80868309, 0x2bed4832, 0x1170ac1e, 0x5a724e6c, 0x0efffbfd, 0x8538560f, 0xaed51e3d, 0x2d392736, 0x0fd9640a, 0x5ca62168, 0x5b54d19b, 0x362e3a24, 0x0a67b10c, 0x57e70f93, 0xee96d2b4, 0x9b919e1b, 0xc0c54f80, 0xdc20a261, 0x774b695a, 0x121a161c, 0x93ba0ae2, 0xa02ae5c0, 0x22e0433c, 0x1b171d12, 0x090d0b0e, 0x8bc7adf2, 0xb6a8b92d, 0x1ea9c814, 0xf1198557, 0x75074caf, 0x99ddbbee, 0x7f60fda3, 0x01269ff7, 0x72f5bc5c, 0x663bc544, 0xfb7e345b, 0x4329768b, 0x23c6dccb, 0xedfc68b6, 0xe4f163b8, 0x31dccad7, 0x63851042, 0x97224013, 0xc6112084, 0x4a247d85, 0xbb3df8d2, 0xf93211ae, 0x29a16dc7, 0x9e2f4b1d, 0xb230f3dc, 0x8652ec0d, 0xc1e3d077, 0xb3166c2b, 0x70b999a9, 0x9448fa11, 0xe9642247, 0xfc8cc4a8, 0xf03f1aa0, 0x7d2cd856, 0x3390ef22, 0x494ec787, 0x38d1c1d9, 0xcaa2fe8c, 0xd40b3698, 0xf581cfa6, 0x7ade28a5, 0xb78e26da, 0xadbfa43f, 0x3a9de42c, 0x78920d50, 0x5fcc9b6a, 0x7e466254, 0x8d13c2f6, 0xd8b8e890, 0x39f75e2e, 0xc3aff582, 0x5d80be9f, 0xd0937c69, 0xd52da96f, 0x2512b3cf, 0xac993bc8, 0x187da710, 0x9c636ee8, 0x3bbb7bdb, 0x267809cd, 0x5918f46e, 0x9ab701ec, 0x4f9aa883, 0x956e65e6, 0xffe67eaa, 0xbccf0821, 0x15e8e6ef, 0xe79bd9ba, 0x6f36ce4a, 0x9f09d4ea, 0xb07cd629, 0xa4b2af31, 0x3f23312a, 0xa59430c6, 0xa266c035, 0x4ebc3774, 0x82caa6fc, 0x90d0b0e0, 0xa7d81533, 0x04984af1, 0xecdaf741, 0xcd500e7f, 0x91f62f17, 0x4dd68d76, 0xefb04d43, 0xaa4d54cc, 0x9604dfe4, 0xd1b5e39e, 0x6a881b4c, 0x2c1fb8c1, 0x65517f46, 0x5eea049d, 0x8c355d01, 0x877473fa, 0x0b412efb, 0x671d5ab3, 0xdbd25292, 0x105633e9, 0xd647136d, 0xd7618c9a, 0xa10c7a37, 0xf8148e59, 0x133c89eb, 0xa927eece, 0x61c935b7, 0x1ce5ede1, 0x47b13c7a, 0xd2df599c, 0xf2733f55, 0x14ce7918, 0xc737bf73, 0xf7cdea53, 0xfdaa5b5f, 0x3d6f14df, 0x44db8678, 0xaff381ca, 0x68c43eb9, 0x24342c38, 0xa3405fc2, 0x1dc37216, 0xe2250cbc, 0x3c498b28, 0x0d9541ff, 0xa8017139, 0x0cb3de08, 0xb4e49cd8, 0x56c19064, 0xcb84617b, 0x32b670d5, 0x6c5c7448, 0xb85742d0]; // Transformations for decryption key expansion
 
-	        return tagMap;
-	    },
+	    var U1 = [0x00000000, 0x0e090d0b, 0x1c121a16, 0x121b171d, 0x3824342c, 0x362d3927, 0x24362e3a, 0x2a3f2331, 0x70486858, 0x7e416553, 0x6c5a724e, 0x62537f45, 0x486c5c74, 0x4665517f, 0x547e4662, 0x5a774b69, 0xe090d0b0, 0xee99ddbb, 0xfc82caa6, 0xf28bc7ad, 0xd8b4e49c, 0xd6bde997, 0xc4a6fe8a, 0xcaaff381, 0x90d8b8e8, 0x9ed1b5e3, 0x8ccaa2fe, 0x82c3aff5, 0xa8fc8cc4, 0xa6f581cf, 0xb4ee96d2, 0xbae79bd9, 0xdb3bbb7b, 0xd532b670, 0xc729a16d, 0xc920ac66, 0xe31f8f57, 0xed16825c, 0xff0d9541, 0xf104984a, 0xab73d323, 0xa57ade28, 0xb761c935, 0xb968c43e, 0x9357e70f, 0x9d5eea04, 0x8f45fd19, 0x814cf012, 0x3bab6bcb, 0x35a266c0, 0x27b971dd, 0x29b07cd6, 0x038f5fe7, 0x0d8652ec, 0x1f9d45f1, 0x119448fa, 0x4be30393, 0x45ea0e98, 0x57f11985, 0x59f8148e, 0x73c737bf, 0x7dce3ab4, 0x6fd52da9, 0x61dc20a2, 0xad766df6, 0xa37f60fd, 0xb16477e0, 0xbf6d7aeb, 0x955259da, 0x9b5b54d1, 0x894043cc, 0x87494ec7, 0xdd3e05ae, 0xd33708a5, 0xc12c1fb8, 0xcf2512b3, 0xe51a3182, 0xeb133c89, 0xf9082b94, 0xf701269f, 0x4de6bd46, 0x43efb04d, 0x51f4a750, 0x5ffdaa5b, 0x75c2896a, 0x7bcb8461, 0x69d0937c, 0x67d99e77, 0x3daed51e, 0x33a7d815, 0x21bccf08, 0x2fb5c203, 0x058ae132, 0x0b83ec39, 0x1998fb24, 0x1791f62f, 0x764dd68d, 0x7844db86, 0x6a5fcc9b, 0x6456c190, 0x4e69e2a1, 0x4060efaa, 0x527bf8b7, 0x5c72f5bc, 0x0605bed5, 0x080cb3de, 0x1a17a4c3, 0x141ea9c8, 0x3e218af9, 0x302887f2, 0x223390ef, 0x2c3a9de4, 0x96dd063d, 0x98d40b36, 0x8acf1c2b, 0x84c61120, 0xaef93211, 0xa0f03f1a, 0xb2eb2807, 0xbce2250c, 0xe6956e65, 0xe89c636e, 0xfa877473, 0xf48e7978, 0xdeb15a49, 0xd0b85742, 0xc2a3405f, 0xccaa4d54, 0x41ecdaf7, 0x4fe5d7fc, 0x5dfec0e1, 0x53f7cdea, 0x79c8eedb, 0x77c1e3d0, 0x65daf4cd, 0x6bd3f9c6, 0x31a4b2af, 0x3fadbfa4, 0x2db6a8b9, 0x23bfa5b2, 0x09808683, 0x07898b88, 0x15929c95, 0x1b9b919e, 0xa17c0a47, 0xaf75074c, 0xbd6e1051, 0xb3671d5a, 0x99583e6b, 0x97513360, 0x854a247d, 0x8b432976, 0xd134621f, 0xdf3d6f14, 0xcd267809, 0xc32f7502, 0xe9105633, 0xe7195b38, 0xf5024c25, 0xfb0b412e, 0x9ad7618c, 0x94de6c87, 0x86c57b9a, 0x88cc7691, 0xa2f355a0, 0xacfa58ab, 0xbee14fb6, 0xb0e842bd, 0xea9f09d4, 0xe49604df, 0xf68d13c2, 0xf8841ec9, 0xd2bb3df8, 0xdcb230f3, 0xcea927ee, 0xc0a02ae5, 0x7a47b13c, 0x744ebc37, 0x6655ab2a, 0x685ca621, 0x42638510, 0x4c6a881b, 0x5e719f06, 0x5078920d, 0x0a0fd964, 0x0406d46f, 0x161dc372, 0x1814ce79, 0x322bed48, 0x3c22e043, 0x2e39f75e, 0x2030fa55, 0xec9ab701, 0xe293ba0a, 0xf088ad17, 0xfe81a01c, 0xd4be832d, 0xdab78e26, 0xc8ac993b, 0xc6a59430, 0x9cd2df59, 0x92dbd252, 0x80c0c54f, 0x8ec9c844, 0xa4f6eb75, 0xaaffe67e, 0xb8e4f163, 0xb6edfc68, 0x0c0a67b1, 0x02036aba, 0x10187da7, 0x1e1170ac, 0x342e539d, 0x3a275e96, 0x283c498b, 0x26354480, 0x7c420fe9, 0x724b02e2, 0x605015ff, 0x6e5918f4, 0x44663bc5, 0x4a6f36ce, 0x587421d3, 0x567d2cd8, 0x37a10c7a, 0x39a80171, 0x2bb3166c, 0x25ba1b67, 0x0f853856, 0x018c355d, 0x13972240, 0x1d9e2f4b, 0x47e96422, 0x49e06929, 0x5bfb7e34, 0x55f2733f, 0x7fcd500e, 0x71c45d05, 0x63df4a18, 0x6dd64713, 0xd731dcca, 0xd938d1c1, 0xcb23c6dc, 0xc52acbd7, 0xef15e8e6, 0xe11ce5ed, 0xf307f2f0, 0xfd0efffb, 0xa779b492, 0xa970b999, 0xbb6bae84, 0xb562a38f, 0x9f5d80be, 0x91548db5, 0x834f9aa8, 0x8d4697a3];
+	    var U2 = [0x00000000, 0x0b0e090d, 0x161c121a, 0x1d121b17, 0x2c382434, 0x27362d39, 0x3a24362e, 0x312a3f23, 0x58704868, 0x537e4165, 0x4e6c5a72, 0x4562537f, 0x74486c5c, 0x7f466551, 0x62547e46, 0x695a774b, 0xb0e090d0, 0xbbee99dd, 0xa6fc82ca, 0xadf28bc7, 0x9cd8b4e4, 0x97d6bde9, 0x8ac4a6fe, 0x81caaff3, 0xe890d8b8, 0xe39ed1b5, 0xfe8ccaa2, 0xf582c3af, 0xc4a8fc8c, 0xcfa6f581, 0xd2b4ee96, 0xd9bae79b, 0x7bdb3bbb, 0x70d532b6, 0x6dc729a1, 0x66c920ac, 0x57e31f8f, 0x5ced1682, 0x41ff0d95, 0x4af10498, 0x23ab73d3, 0x28a57ade, 0x35b761c9, 0x3eb968c4, 0x0f9357e7, 0x049d5eea, 0x198f45fd, 0x12814cf0, 0xcb3bab6b, 0xc035a266, 0xdd27b971, 0xd629b07c, 0xe7038f5f, 0xec0d8652, 0xf11f9d45, 0xfa119448, 0x934be303, 0x9845ea0e, 0x8557f119, 0x8e59f814, 0xbf73c737, 0xb47dce3a, 0xa96fd52d, 0xa261dc20, 0xf6ad766d, 0xfda37f60, 0xe0b16477, 0xebbf6d7a, 0xda955259, 0xd19b5b54, 0xcc894043, 0xc787494e, 0xaedd3e05, 0xa5d33708, 0xb8c12c1f, 0xb3cf2512, 0x82e51a31, 0x89eb133c, 0x94f9082b, 0x9ff70126, 0x464de6bd, 0x4d43efb0, 0x5051f4a7, 0x5b5ffdaa, 0x6a75c289, 0x617bcb84, 0x7c69d093, 0x7767d99e, 0x1e3daed5, 0x1533a7d8, 0x0821bccf, 0x032fb5c2, 0x32058ae1, 0x390b83ec, 0x241998fb, 0x2f1791f6, 0x8d764dd6, 0x867844db, 0x9b6a5fcc, 0x906456c1, 0xa14e69e2, 0xaa4060ef, 0xb7527bf8, 0xbc5c72f5, 0xd50605be, 0xde080cb3, 0xc31a17a4, 0xc8141ea9, 0xf93e218a, 0xf2302887, 0xef223390, 0xe42c3a9d, 0x3d96dd06, 0x3698d40b, 0x2b8acf1c, 0x2084c611, 0x11aef932, 0x1aa0f03f, 0x07b2eb28, 0x0cbce225, 0x65e6956e, 0x6ee89c63, 0x73fa8774, 0x78f48e79, 0x49deb15a, 0x42d0b857, 0x5fc2a340, 0x54ccaa4d, 0xf741ecda, 0xfc4fe5d7, 0xe15dfec0, 0xea53f7cd, 0xdb79c8ee, 0xd077c1e3, 0xcd65daf4, 0xc66bd3f9, 0xaf31a4b2, 0xa43fadbf, 0xb92db6a8, 0xb223bfa5, 0x83098086, 0x8807898b, 0x9515929c, 0x9e1b9b91, 0x47a17c0a, 0x4caf7507, 0x51bd6e10, 0x5ab3671d, 0x6b99583e, 0x60975133, 0x7d854a24, 0x768b4329, 0x1fd13462, 0x14df3d6f, 0x09cd2678, 0x02c32f75, 0x33e91056, 0x38e7195b, 0x25f5024c, 0x2efb0b41, 0x8c9ad761, 0x8794de6c, 0x9a86c57b, 0x9188cc76, 0xa0a2f355, 0xabacfa58, 0xb6bee14f, 0xbdb0e842, 0xd4ea9f09, 0xdfe49604, 0xc2f68d13, 0xc9f8841e, 0xf8d2bb3d, 0xf3dcb230, 0xeecea927, 0xe5c0a02a, 0x3c7a47b1, 0x37744ebc, 0x2a6655ab, 0x21685ca6, 0x10426385, 0x1b4c6a88, 0x065e719f, 0x0d507892, 0x640a0fd9, 0x6f0406d4, 0x72161dc3, 0x791814ce, 0x48322bed, 0x433c22e0, 0x5e2e39f7, 0x552030fa, 0x01ec9ab7, 0x0ae293ba, 0x17f088ad, 0x1cfe81a0, 0x2dd4be83, 0x26dab78e, 0x3bc8ac99, 0x30c6a594, 0x599cd2df, 0x5292dbd2, 0x4f80c0c5, 0x448ec9c8, 0x75a4f6eb, 0x7eaaffe6, 0x63b8e4f1, 0x68b6edfc, 0xb10c0a67, 0xba02036a, 0xa710187d, 0xac1e1170, 0x9d342e53, 0x963a275e, 0x8b283c49, 0x80263544, 0xe97c420f, 0xe2724b02, 0xff605015, 0xf46e5918, 0xc544663b, 0xce4a6f36, 0xd3587421, 0xd8567d2c, 0x7a37a10c, 0x7139a801, 0x6c2bb316, 0x6725ba1b, 0x560f8538, 0x5d018c35, 0x40139722, 0x4b1d9e2f, 0x2247e964, 0x2949e069, 0x345bfb7e, 0x3f55f273, 0x0e7fcd50, 0x0571c45d, 0x1863df4a, 0x136dd647, 0xcad731dc, 0xc1d938d1, 0xdccb23c6, 0xd7c52acb, 0xe6ef15e8, 0xede11ce5, 0xf0f307f2, 0xfbfd0eff, 0x92a779b4, 0x99a970b9, 0x84bb6bae, 0x8fb562a3, 0xbe9f5d80, 0xb591548d, 0xa8834f9a, 0xa38d4697];
+	    var U3 = [0x00000000, 0x0d0b0e09, 0x1a161c12, 0x171d121b, 0x342c3824, 0x3927362d, 0x2e3a2436, 0x23312a3f, 0x68587048, 0x65537e41, 0x724e6c5a, 0x7f456253, 0x5c74486c, 0x517f4665, 0x4662547e, 0x4b695a77, 0xd0b0e090, 0xddbbee99, 0xcaa6fc82, 0xc7adf28b, 0xe49cd8b4, 0xe997d6bd, 0xfe8ac4a6, 0xf381caaf, 0xb8e890d8, 0xb5e39ed1, 0xa2fe8cca, 0xaff582c3, 0x8cc4a8fc, 0x81cfa6f5, 0x96d2b4ee, 0x9bd9bae7, 0xbb7bdb3b, 0xb670d532, 0xa16dc729, 0xac66c920, 0x8f57e31f, 0x825ced16, 0x9541ff0d, 0x984af104, 0xd323ab73, 0xde28a57a, 0xc935b761, 0xc43eb968, 0xe70f9357, 0xea049d5e, 0xfd198f45, 0xf012814c, 0x6bcb3bab, 0x66c035a2, 0x71dd27b9, 0x7cd629b0, 0x5fe7038f, 0x52ec0d86, 0x45f11f9d, 0x48fa1194, 0x03934be3, 0x0e9845ea, 0x198557f1, 0x148e59f8, 0x37bf73c7, 0x3ab47dce, 0x2da96fd5, 0x20a261dc, 0x6df6ad76, 0x60fda37f, 0x77e0b164, 0x7aebbf6d, 0x59da9552, 0x54d19b5b, 0x43cc8940, 0x4ec78749, 0x05aedd3e, 0x08a5d337, 0x1fb8c12c, 0x12b3cf25, 0x3182e51a, 0x3c89eb13, 0x2b94f908, 0x269ff701, 0xbd464de6, 0xb04d43ef, 0xa75051f4, 0xaa5b5ffd, 0x896a75c2, 0x84617bcb, 0x937c69d0, 0x9e7767d9, 0xd51e3dae, 0xd81533a7, 0xcf0821bc, 0xc2032fb5, 0xe132058a, 0xec390b83, 0xfb241998, 0xf62f1791, 0xd68d764d, 0xdb867844, 0xcc9b6a5f, 0xc1906456, 0xe2a14e69, 0xefaa4060, 0xf8b7527b, 0xf5bc5c72, 0xbed50605, 0xb3de080c, 0xa4c31a17, 0xa9c8141e, 0x8af93e21, 0x87f23028, 0x90ef2233, 0x9de42c3a, 0x063d96dd, 0x0b3698d4, 0x1c2b8acf, 0x112084c6, 0x3211aef9, 0x3f1aa0f0, 0x2807b2eb, 0x250cbce2, 0x6e65e695, 0x636ee89c, 0x7473fa87, 0x7978f48e, 0x5a49deb1, 0x5742d0b8, 0x405fc2a3, 0x4d54ccaa, 0xdaf741ec, 0xd7fc4fe5, 0xc0e15dfe, 0xcdea53f7, 0xeedb79c8, 0xe3d077c1, 0xf4cd65da, 0xf9c66bd3, 0xb2af31a4, 0xbfa43fad, 0xa8b92db6, 0xa5b223bf, 0x86830980, 0x8b880789, 0x9c951592, 0x919e1b9b, 0x0a47a17c, 0x074caf75, 0x1051bd6e, 0x1d5ab367, 0x3e6b9958, 0x33609751, 0x247d854a, 0x29768b43, 0x621fd134, 0x6f14df3d, 0x7809cd26, 0x7502c32f, 0x5633e910, 0x5b38e719, 0x4c25f502, 0x412efb0b, 0x618c9ad7, 0x6c8794de, 0x7b9a86c5, 0x769188cc, 0x55a0a2f3, 0x58abacfa, 0x4fb6bee1, 0x42bdb0e8, 0x09d4ea9f, 0x04dfe496, 0x13c2f68d, 0x1ec9f884, 0x3df8d2bb, 0x30f3dcb2, 0x27eecea9, 0x2ae5c0a0, 0xb13c7a47, 0xbc37744e, 0xab2a6655, 0xa621685c, 0x85104263, 0x881b4c6a, 0x9f065e71, 0x920d5078, 0xd9640a0f, 0xd46f0406, 0xc372161d, 0xce791814, 0xed48322b, 0xe0433c22, 0xf75e2e39, 0xfa552030, 0xb701ec9a, 0xba0ae293, 0xad17f088, 0xa01cfe81, 0x832dd4be, 0x8e26dab7, 0x993bc8ac, 0x9430c6a5, 0xdf599cd2, 0xd25292db, 0xc54f80c0, 0xc8448ec9, 0xeb75a4f6, 0xe67eaaff, 0xf163b8e4, 0xfc68b6ed, 0x67b10c0a, 0x6aba0203, 0x7da71018, 0x70ac1e11, 0x539d342e, 0x5e963a27, 0x498b283c, 0x44802635, 0x0fe97c42, 0x02e2724b, 0x15ff6050, 0x18f46e59, 0x3bc54466, 0x36ce4a6f, 0x21d35874, 0x2cd8567d, 0x0c7a37a1, 0x017139a8, 0x166c2bb3, 0x1b6725ba, 0x38560f85, 0x355d018c, 0x22401397, 0x2f4b1d9e, 0x642247e9, 0x692949e0, 0x7e345bfb, 0x733f55f2, 0x500e7fcd, 0x5d0571c4, 0x4a1863df, 0x47136dd6, 0xdccad731, 0xd1c1d938, 0xc6dccb23, 0xcbd7c52a, 0xe8e6ef15, 0xe5ede11c, 0xf2f0f307, 0xfffbfd0e, 0xb492a779, 0xb999a970, 0xae84bb6b, 0xa38fb562, 0x80be9f5d, 0x8db59154, 0x9aa8834f, 0x97a38d46];
+	    var U4 = [0x00000000, 0x090d0b0e, 0x121a161c, 0x1b171d12, 0x24342c38, 0x2d392736, 0x362e3a24, 0x3f23312a, 0x48685870, 0x4165537e, 0x5a724e6c, 0x537f4562, 0x6c5c7448, 0x65517f46, 0x7e466254, 0x774b695a, 0x90d0b0e0, 0x99ddbbee, 0x82caa6fc, 0x8bc7adf2, 0xb4e49cd8, 0xbde997d6, 0xa6fe8ac4, 0xaff381ca, 0xd8b8e890, 0xd1b5e39e, 0xcaa2fe8c, 0xc3aff582, 0xfc8cc4a8, 0xf581cfa6, 0xee96d2b4, 0xe79bd9ba, 0x3bbb7bdb, 0x32b670d5, 0x29a16dc7, 0x20ac66c9, 0x1f8f57e3, 0x16825ced, 0x0d9541ff, 0x04984af1, 0x73d323ab, 0x7ade28a5, 0x61c935b7, 0x68c43eb9, 0x57e70f93, 0x5eea049d, 0x45fd198f, 0x4cf01281, 0xab6bcb3b, 0xa266c035, 0xb971dd27, 0xb07cd629, 0x8f5fe703, 0x8652ec0d, 0x9d45f11f, 0x9448fa11, 0xe303934b, 0xea0e9845, 0xf1198557, 0xf8148e59, 0xc737bf73, 0xce3ab47d, 0xd52da96f, 0xdc20a261, 0x766df6ad, 0x7f60fda3, 0x6477e0b1, 0x6d7aebbf, 0x5259da95, 0x5b54d19b, 0x4043cc89, 0x494ec787, 0x3e05aedd, 0x3708a5d3, 0x2c1fb8c1, 0x2512b3cf, 0x1a3182e5, 0x133c89eb, 0x082b94f9, 0x01269ff7, 0xe6bd464d, 0xefb04d43, 0xf4a75051, 0xfdaa5b5f, 0xc2896a75, 0xcb84617b, 0xd0937c69, 0xd99e7767, 0xaed51e3d, 0xa7d81533, 0xbccf0821, 0xb5c2032f, 0x8ae13205, 0x83ec390b, 0x98fb2419, 0x91f62f17, 0x4dd68d76, 0x44db8678, 0x5fcc9b6a, 0x56c19064, 0x69e2a14e, 0x60efaa40, 0x7bf8b752, 0x72f5bc5c, 0x05bed506, 0x0cb3de08, 0x17a4c31a, 0x1ea9c814, 0x218af93e, 0x2887f230, 0x3390ef22, 0x3a9de42c, 0xdd063d96, 0xd40b3698, 0xcf1c2b8a, 0xc6112084, 0xf93211ae, 0xf03f1aa0, 0xeb2807b2, 0xe2250cbc, 0x956e65e6, 0x9c636ee8, 0x877473fa, 0x8e7978f4, 0xb15a49de, 0xb85742d0, 0xa3405fc2, 0xaa4d54cc, 0xecdaf741, 0xe5d7fc4f, 0xfec0e15d, 0xf7cdea53, 0xc8eedb79, 0xc1e3d077, 0xdaf4cd65, 0xd3f9c66b, 0xa4b2af31, 0xadbfa43f, 0xb6a8b92d, 0xbfa5b223, 0x80868309, 0x898b8807, 0x929c9515, 0x9b919e1b, 0x7c0a47a1, 0x75074caf, 0x6e1051bd, 0x671d5ab3, 0x583e6b99, 0x51336097, 0x4a247d85, 0x4329768b, 0x34621fd1, 0x3d6f14df, 0x267809cd, 0x2f7502c3, 0x105633e9, 0x195b38e7, 0x024c25f5, 0x0b412efb, 0xd7618c9a, 0xde6c8794, 0xc57b9a86, 0xcc769188, 0xf355a0a2, 0xfa58abac, 0xe14fb6be, 0xe842bdb0, 0x9f09d4ea, 0x9604dfe4, 0x8d13c2f6, 0x841ec9f8, 0xbb3df8d2, 0xb230f3dc, 0xa927eece, 0xa02ae5c0, 0x47b13c7a, 0x4ebc3774, 0x55ab2a66, 0x5ca62168, 0x63851042, 0x6a881b4c, 0x719f065e, 0x78920d50, 0x0fd9640a, 0x06d46f04, 0x1dc37216, 0x14ce7918, 0x2bed4832, 0x22e0433c, 0x39f75e2e, 0x30fa5520, 0x9ab701ec, 0x93ba0ae2, 0x88ad17f0, 0x81a01cfe, 0xbe832dd4, 0xb78e26da, 0xac993bc8, 0xa59430c6, 0xd2df599c, 0xdbd25292, 0xc0c54f80, 0xc9c8448e, 0xf6eb75a4, 0xffe67eaa, 0xe4f163b8, 0xedfc68b6, 0x0a67b10c, 0x036aba02, 0x187da710, 0x1170ac1e, 0x2e539d34, 0x275e963a, 0x3c498b28, 0x35448026, 0x420fe97c, 0x4b02e272, 0x5015ff60, 0x5918f46e, 0x663bc544, 0x6f36ce4a, 0x7421d358, 0x7d2cd856, 0xa10c7a37, 0xa8017139, 0xb3166c2b, 0xba1b6725, 0x8538560f, 0x8c355d01, 0x97224013, 0x9e2f4b1d, 0xe9642247, 0xe0692949, 0xfb7e345b, 0xf2733f55, 0xcd500e7f, 0xc45d0571, 0xdf4a1863, 0xd647136d, 0x31dccad7, 0x38d1c1d9, 0x23c6dccb, 0x2acbd7c5, 0x15e8e6ef, 0x1ce5ede1, 0x07f2f0f3, 0x0efffbfd, 0x79b492a7, 0x70b999a9, 0x6bae84bb, 0x62a38fb5, 0x5d80be9f, 0x548db591, 0x4f9aa883, 0x4697a38d];
 
-	    // inspired by osmWay#isArea()
-	    inferGeometry: function(tagMap) {
-	        var _lineKeys = this._lineKeys;
-	        var _areaKeys = this._areaKeys;
+	    function convertToInt32(bytes) {
+	      var result = [];
 
-	        var keyValueDoesNotImplyArea = function(key) {
-	            return utilArrayIntersection(tagMap[key], Object.keys(_areaKeys[key])).length > 0;
-	        };
-	        var keyValueImpliesLine = function(key) {
-	            return utilArrayIntersection(tagMap[key], Object.keys(_lineKeys[key])).length > 0;
-	        };
+	      for (var i = 0; i < bytes.length; i += 4) {
+	        result.push(bytes[i] << 24 | bytes[i + 1] << 16 | bytes[i + 2] << 8 | bytes[i + 3]);
+	      }
 
-	        if (tagMap.hasOwnProperty('area')) {
-	            if (tagMap.area.indexOf('yes') > -1) {
-	                return 'area';
-	            }
-	            if (tagMap.area.indexOf('no') > -1) {
-	                return 'line';
-	            }
-	        }
+	      return result;
+	    }
 
-	        for (var key in tagMap) {
-	            if (key in _areaKeys && !keyValueDoesNotImplyArea(key)) {
-	                return 'area';
-	            }
-	            if (key in _lineKeys && keyValueImpliesLine(key)) {
-	                return 'area';
-	            }
-	        }
+	    var AES = function AES(key) {
+	      if (!(this instanceof AES)) {
+	        throw Error('AES must be instanitated with `new`');
+	      }
 
-	        return 'line';
-	    },
+	      Object.defineProperty(this, 'key', {
+	        value: coerceArray(key, true)
+	      });
 
-	    // adds from mapcss-parse selector check...
-	    addRule: function(selector) {
-	        var rule = {
-	            // checks relevant to mapcss-selector
-	            checks: this.filterRuleChecks(selector),
-	            // true if all conditions for a tag error are true..
-	            matches: function(entity) {
-	                return this.checks.every(function(check) {
-	                    return check(entity.tags);
-	                });
-	            },
-	            // borrowed from Way#isArea()
-	            inferredGeometry: this.inferGeometry(this.buildTagMap(selector), this._areaKeys),
-	            geometryMatches: function(entity, graph) {
-	                if (entity.type === 'node' || entity.type === 'relation') {
-	                    return selector.geometry === entity.type;
-	                } else if (entity.type === 'way') {
-	                    return this.inferredGeometry === entity.geometry(graph);
-	                }
-	            },
-	            // when geometries match and tag matches are present, return a warning...
-	            findIssues: function (entity, graph, issues) {
-	                if (this.geometryMatches(entity, graph) && this.matches(entity)) {
-	                    var severity = Object.keys(selector).indexOf('error') > -1
-	                            ? 'error'
-	                            : 'warning';
-	                    var message = selector[severity];
-	                    issues.push(new validationIssue({
-	                        type: 'maprules',
-	                        severity: severity,
-	                        message: function() {
-	                            return message;
-	                        },
-	                        entityIds: [entity.id]
-	                    }));
-	                }
-	            }
-	        };
-	        this._validationRules.push(rule);
-	    },
+	      this._prepare();
+	    };
 
-	    clearRules: function() { this._validationRules = []; },
+	    AES.prototype._prepare = function () {
+	      var rounds = numberOfRounds[this.key.length];
 
-	    // returns validationRules...
-	    validationRules: function() { return this._validationRules; },
+	      if (rounds == null) {
+	        throw new Error('invalid key size (must be 16, 24 or 32 bytes)');
+	      } // encryption round keys
 
-	    // returns ruleChecks
-	    ruleChecks: function() { return this._ruleChecks; }
-	};
 
-	var apibase$1 = 'https://nominatim.openstreetmap.org/';
-	var _inflight = {};
-	var _nominatimCache;
+	      this._Ke = []; // decryption round keys
 
+	      this._Kd = [];
 
-	var serviceNominatim = {
+	      for (var i = 0; i <= rounds; i++) {
+	        this._Ke.push([0, 0, 0, 0]);
 
-	    init: function() {
-	        _inflight = {};
-	        _nominatimCache = new RBush();
-	    },
+	        this._Kd.push([0, 0, 0, 0]);
+	      }
 
-	    reset: function() {
-	        Object.values(_inflight).forEach(function(controller) { controller.abort(); });
-	        _inflight = {};
-	        _nominatimCache = new RBush();
-	    },
+	      var roundKeyCount = (rounds + 1) * 4;
+	      var KC = this.key.length / 4; // convert the key into ints
 
+	      var tk = convertToInt32(this.key); // copy values into round key arrays
 
-	    countryCode: function (location, callback) {
-	        this.reverse(location, function(err, result) {
-	            if (err) {
-	                return callback(err);
-	            } else if (result.address) {
-	                return callback(null, result.address.country_code);
-	            } else {
-	                return callback('Unable to geocode', null);
-	            }
-	        });
-	    },
+	      var index;
 
+	      for (var i = 0; i < KC; i++) {
+	        index = i >> 2;
+	        this._Ke[index][i % 4] = tk[i];
+	        this._Kd[rounds - index][i % 4] = tk[i];
+	      } // key expansion (fips-197 section 5.2)
 
-	    reverse: function (loc, callback) {
-	        var cached = _nominatimCache.search(
-	            { minX: loc[0], minY: loc[1], maxX: loc[0], maxY: loc[1] }
-	        );
 
-	        if (cached.length > 0) {
-	            if (callback) { callback(null, cached[0].data); }
-	            return;
-	        }
+	      var rconpointer = 0;
+	      var t = KC,
+	          tt;
 
-	        var params = { zoom: 13, format: 'json', addressdetails: 1, lat: loc[1], lon: loc[0] };
-	        var url = apibase$1 + 'reverse?' + utilQsString(params);
+	      while (t < roundKeyCount) {
+	        tt = tk[KC - 1];
+	        tk[0] ^= S[tt >> 16 & 0xFF] << 24 ^ S[tt >> 8 & 0xFF] << 16 ^ S[tt & 0xFF] << 8 ^ S[tt >> 24 & 0xFF] ^ rcon[rconpointer] << 24;
+	        rconpointer += 1; // key expansion (for non-256 bit)
 
-	        if (_inflight[url]) { return; }
-	        var controller = new AbortController();
-	        _inflight[url] = controller;
+	        if (KC != 8) {
+	          for (var i = 1; i < KC; i++) {
+	            tk[i] ^= tk[i - 1];
+	          } // key expansion for 256-bit keys is "slightly different" (fips-197)
 
-	        d3_json(url, { signal: controller.signal })
-	            .then(function(result) {
-	                delete _inflight[url];
-	                if (result && result.error) {
-	                    throw new Error(result.error);
-	                }
-	                var extent = geoExtent(loc).padByMeters(200);
-	                _nominatimCache.insert(Object.assign(extent.bbox(), {data: result}));
-	                if (callback) { callback(null, result); }
-	            })
-	            .catch(function(err) {
-	                delete _inflight[url];
-	                if (err.name === 'AbortError') { return; }
-	                if (callback) { callback(err.message); }
-	            });
-	    },
+	        } else {
+	          for (var i = 1; i < KC / 2; i++) {
+	            tk[i] ^= tk[i - 1];
+	          }
 
+	          tt = tk[KC / 2 - 1];
+	          tk[KC / 2] ^= S[tt & 0xFF] ^ S[tt >> 8 & 0xFF] << 8 ^ S[tt >> 16 & 0xFF] << 16 ^ S[tt >> 24 & 0xFF] << 24;
 
-	    search: function (val, callback) {
-	        var searchVal = encodeURIComponent(val);
-	        var url = apibase$1 + 'search/' + searchVal + '?limit=10&format=json';
+	          for (var i = KC / 2 + 1; i < KC; i++) {
+	            tk[i] ^= tk[i - 1];
+	          }
+	        } // copy values into round key arrays
 
-	        if (_inflight[url]) { return; }
-	        var controller = new AbortController();
-	        _inflight[url] = controller;
 
-	        d3_json(url, { signal: controller.signal })
-	            .then(function(result) {
-	                delete _inflight[url];
-	                if (result && result.error) {
-	                    throw new Error(result.error);
-	                }
-	                if (callback) { callback(null, result); }
-	            })
-	            .catch(function(err) {
-	                delete _inflight[url];
-	                if (err.name === 'AbortError') { return; }
-	                if (callback) { callback(err.message); }
-	            });
-	    }
+	        var i = 0,
+	            r,
+	            c;
 
-	};
+	        while (i < KC && t < roundKeyCount) {
+	          r = t >> 2;
+	          c = t % 4;
+	          this._Ke[r][c] = tk[i];
+	          this._Kd[rounds - r][c] = tk[i++];
+	          t++;
+	        }
+	      } // inverse-cipher-ify the decryption round key (fips-197 section 5.3)
 
-	var apibase$2 = 'https://openstreetcam.org';
-	var maxResults$1 = 1000;
-	var tileZoom$1 = 14;
-	var tiler$4 = utilTiler().zoomExtent([tileZoom$1, tileZoom$1]).skipNullIsland(true);
-	var dispatch$5 = dispatch('loadedImages');
-	var imgZoom = d3_zoom()
-	    .extent([[0, 0], [320, 240]])
-	    .translateExtent([[0, 0], [320, 240]])
-	    .scaleExtent([1, 15]);
-	var _oscCache;
-	var _oscSelectedImage;
 
+	      for (var r = 1; r < rounds; r++) {
+	        for (var c = 0; c < 4; c++) {
+	          tt = this._Kd[r][c];
+	          this._Kd[r][c] = U1[tt >> 24 & 0xFF] ^ U2[tt >> 16 & 0xFF] ^ U3[tt >> 8 & 0xFF] ^ U4[tt & 0xFF];
+	        }
+	      }
+	    };
 
-	function abortRequest$4(controller) {
-	    controller.abort();
-	}
+	    AES.prototype.encrypt = function (plaintext) {
+	      if (plaintext.length != 16) {
+	        throw new Error('invalid plaintext size (must be 16 bytes)');
+	      }
 
+	      var rounds = this._Ke.length - 1;
+	      var a = [0, 0, 0, 0]; // convert plaintext to (ints ^ key)
 
-	function maxPageAtZoom$1(z) {
-	    if (z < 15)   { return 2; }
-	    if (z === 15) { return 5; }
-	    if (z === 16) { return 10; }
-	    if (z === 17) { return 20; }
-	    if (z === 18) { return 40; }
-	    if (z > 18)   { return 80; }
-	}
+	      var t = convertToInt32(plaintext);
 
+	      for (var i = 0; i < 4; i++) {
+	        t[i] ^= this._Ke[0][i];
+	      } // apply round transforms
 
-	function loadTiles$1(which, url, projection) {
-	    var currZoom = Math.floor(geoScaleToZoom(projection.scale()));
-	    var tiles = tiler$4.getTiles(projection);
 
-	    // abort inflight requests that are no longer needed
-	    var cache = _oscCache[which];
-	    Object.keys(cache.inflight).forEach(function(k) {
-	        var wanted = tiles.find(function(tile) { return k.indexOf(tile.id + ',') === 0; });
-	        if (!wanted) {
-	            abortRequest$4(cache.inflight[k]);
-	            delete cache.inflight[k];
+	      for (var r = 1; r < rounds; r++) {
+	        for (var i = 0; i < 4; i++) {
+	          a[i] = T1[t[i] >> 24 & 0xff] ^ T2[t[(i + 1) % 4] >> 16 & 0xff] ^ T3[t[(i + 2) % 4] >> 8 & 0xff] ^ T4[t[(i + 3) % 4] & 0xff] ^ this._Ke[r][i];
 	        }
-	    });
-
-	    tiles.forEach(function(tile) {
-	        loadNextTilePage$1(which, currZoom, url, tile);
-	    });
-	}
 
+	        t = a.slice();
+	      } // the last round is special
 
-	function loadNextTilePage$1(which, currZoom, url, tile) {
-	    var cache = _oscCache[which];
-	    var bbox = tile.extent.bbox();
-	    var maxPages = maxPageAtZoom$1(currZoom);
-	    var nextPage = cache.nextPage[tile.id] || 1;
-	    var params = utilQsString({
-	        ipp: maxResults$1,
-	        page: nextPage,
-	        // client_id: clientId,
-	        bbTopLeft: [bbox.maxY, bbox.minX].join(','),
-	        bbBottomRight: [bbox.minY, bbox.maxX].join(',')
-	    }, true);
 
-	    if (nextPage > maxPages) { return; }
+	      var result = createArray(16),
+	          tt;
 
-	    var id = tile.id + ',' + String(nextPage);
-	    if (cache.loaded[id] || cache.inflight[id]) { return; }
-
-	    var controller = new AbortController();
-	    cache.inflight[id] = controller;
+	      for (var i = 0; i < 4; i++) {
+	        tt = this._Ke[rounds][i];
+	        result[4 * i] = (S[t[i] >> 24 & 0xff] ^ tt >> 24) & 0xff;
+	        result[4 * i + 1] = (S[t[(i + 1) % 4] >> 16 & 0xff] ^ tt >> 16) & 0xff;
+	        result[4 * i + 2] = (S[t[(i + 2) % 4] >> 8 & 0xff] ^ tt >> 8) & 0xff;
+	        result[4 * i + 3] = (S[t[(i + 3) % 4] & 0xff] ^ tt) & 0xff;
+	      }
 
-	    var options = {
-	        method: 'POST',
-	        signal: controller.signal,
-	        body: params,
-	        headers: { 'Content-Type': 'application/x-www-form-urlencoded' }
+	      return result;
 	    };
 
-	    d3_json(url, options)
-	        .then(function(data) {
-	            cache.loaded[id] = true;
-	            delete cache.inflight[id];
-	            if (!data || !data.currentPageItems || !data.currentPageItems.length) {
-	                throw new Error('No Data');
-	            }
+	    AES.prototype.decrypt = function (ciphertext) {
+	      if (ciphertext.length != 16) {
+	        throw new Error('invalid ciphertext size (must be 16 bytes)');
+	      }
 
-	            var features = data.currentPageItems.map(function(item) {
-	                var loc = [+item.lng, +item.lat];
-	                var d;
-
-	                if (which === 'images') {
-	                    d = {
-	                        loc: loc,
-	                        key: item.id,
-	                        ca: +item.heading,
-	                        captured_at: (item.shot_date || item.date_added),
-	                        captured_by: item.username,
-	                        imagePath: item.lth_name,
-	                        sequence_id: item.sequence_id,
-	                        sequence_index: +item.sequence_index
-	                    };
-
-	                    // cache sequence info
-	                    var seq = _oscCache.sequences[d.sequence_id];
-	                    if (!seq) {
-	                        seq = { rotation: 0, images: [] };
-	                        _oscCache.sequences[d.sequence_id] = seq;
-	                    }
-	                    seq.images[d.sequence_index] = d;
-	                }
+	      var rounds = this._Kd.length - 1;
+	      var a = [0, 0, 0, 0]; // convert plaintext to (ints ^ key)
 
-	                return {
-	                    minX: loc[0], minY: loc[1], maxX: loc[0], maxY: loc[1], data: d
-	                };
-	            });
+	      var t = convertToInt32(ciphertext);
 
-	            cache.rtree.load(features);
+	      for (var i = 0; i < 4; i++) {
+	        t[i] ^= this._Kd[0][i];
+	      } // apply round transforms
 
-	            if (data.currentPageItems.length === maxResults$1) {  // more pages to load
-	                cache.nextPage[tile.id] = nextPage + 1;
-	                loadNextTilePage$1(which, currZoom, url, tile);
-	            } else {
-	                cache.nextPage[tile.id] = Infinity;     // no more pages to load
-	            }
 
-	            if (which === 'images') {
-	                dispatch$5.call('loadedImages');
-	            }
-	        })
-	        .catch(function() {
-	            cache.loaded[id] = true;
-	            delete cache.inflight[id];
-	        });
-	}
+	      for (var r = 1; r < rounds; r++) {
+	        for (var i = 0; i < 4; i++) {
+	          a[i] = T5[t[i] >> 24 & 0xff] ^ T6[t[(i + 3) % 4] >> 16 & 0xff] ^ T7[t[(i + 2) % 4] >> 8 & 0xff] ^ T8[t[(i + 1) % 4] & 0xff] ^ this._Kd[r][i];
+	        }
 
+	        t = a.slice();
+	      } // the last round is special
 
-	// partition viewport into higher zoom tiles
-	function partitionViewport$1(projection) {
-	    var z = geoScaleToZoom(projection.scale());
-	    var z2 = (Math.ceil(z * 2) / 2) + 2.5;   // round to next 0.5 and add 2.5
-	    var tiler = utilTiler().zoomExtent([z2, z2]);
 
-	    return tiler.getTiles(projection)
-	        .map(function(tile) { return tile.extent; });
-	}
+	      var result = createArray(16),
+	          tt;
 
+	      for (var i = 0; i < 4; i++) {
+	        tt = this._Kd[rounds][i];
+	        result[4 * i] = (Si[t[i] >> 24 & 0xff] ^ tt >> 24) & 0xff;
+	        result[4 * i + 1] = (Si[t[(i + 3) % 4] >> 16 & 0xff] ^ tt >> 16) & 0xff;
+	        result[4 * i + 2] = (Si[t[(i + 2) % 4] >> 8 & 0xff] ^ tt >> 8) & 0xff;
+	        result[4 * i + 3] = (Si[t[(i + 1) % 4] & 0xff] ^ tt) & 0xff;
+	      }
 
-	// no more than `limit` results per partition.
-	function searchLimited$1(limit, projection, rtree) {
-	    limit = limit || 5;
+	      return result;
+	    };
+	    /**
+	     *  Mode Of Operation - Electonic Codebook (ECB)
+	     */
 
-	    return partitionViewport$1(projection)
-	        .reduce(function(result, extent) {
-	            var found = rtree.search(extent.bbox())
-	                .slice(0, limit)
-	                .map(function(d) { return d.data; });
 
-	            return (found.length ? result.concat(found) : result);
-	        }, []);
-	}
+	    var ModeOfOperationECB = function ModeOfOperationECB(key) {
+	      if (!(this instanceof ModeOfOperationECB)) {
+	        throw Error('AES must be instanitated with `new`');
+	      }
 
+	      this.description = "Electronic Code Block";
+	      this.name = "ecb";
+	      this._aes = new AES(key);
+	    };
 
-	var serviceOpenstreetcam = {
+	    ModeOfOperationECB.prototype.encrypt = function (plaintext) {
+	      plaintext = coerceArray(plaintext);
 
-	    init: function() {
-	        if (!_oscCache) {
-	            this.reset();
-	        }
+	      if (plaintext.length % 16 !== 0) {
+	        throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
+	      }
 
-	        this.event = utilRebind(this, dispatch$5, 'on');
-	    },
+	      var ciphertext = createArray(plaintext.length);
+	      var block = createArray(16);
 
-	    reset: function() {
-	        if (_oscCache) {
-	            Object.values(_oscCache.images.inflight).forEach(abortRequest$4);
-	        }
+	      for (var i = 0; i < plaintext.length; i += 16) {
+	        copyArray(plaintext, block, 0, i, i + 16);
+	        block = this._aes.encrypt(block);
+	        copyArray(block, ciphertext, i);
+	      }
 
-	        _oscCache = {
-	            images: { inflight: {}, loaded: {}, nextPage: {}, rtree: new RBush() },
-	            sequences: {}
-	        };
+	      return ciphertext;
+	    };
 
-	        _oscSelectedImage = null;
-	    },
+	    ModeOfOperationECB.prototype.decrypt = function (ciphertext) {
+	      ciphertext = coerceArray(ciphertext);
 
+	      if (ciphertext.length % 16 !== 0) {
+	        throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
+	      }
 
-	    images: function(projection) {
-	        var limit = 5;
-	        return searchLimited$1(limit, projection, _oscCache.images.rtree);
-	    },
+	      var plaintext = createArray(ciphertext.length);
+	      var block = createArray(16);
 
+	      for (var i = 0; i < ciphertext.length; i += 16) {
+	        copyArray(ciphertext, block, 0, i, i + 16);
+	        block = this._aes.decrypt(block);
+	        copyArray(block, plaintext, i);
+	      }
 
-	    sequences: function(projection) {
-	        var viewport = projection.clipExtent();
-	        var min = [viewport[0][0], viewport[1][1]];
-	        var max = [viewport[1][0], viewport[0][1]];
-	        var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
-	        var sequenceKeys = {};
-
-	        // all sequences for images in viewport
-	        _oscCache.images.rtree.search(bbox)
-	            .forEach(function(d) { sequenceKeys[d.data.sequence_id] = true; });
-
-	        // make linestrings from those sequences
-	        var lineStrings = [];
-	        Object.keys(sequenceKeys)
-	            .forEach(function(sequenceKey) {
-	                var seq = _oscCache.sequences[sequenceKey];
-	                var images = seq && seq.images;
-	                if (images) {
-	                    lineStrings.push({
-	                        type: 'LineString',
-	                        coordinates: images.map(function (d) { return d.loc; }).filter(Boolean),
-	                        properties: { key: sequenceKey }
-	                    });
-	                }
-	            });
-	        return lineStrings;
-	    },
+	      return plaintext;
+	    };
+	    /**
+	     *  Mode Of Operation - Cipher Block Chaining (CBC)
+	     */
 
 
-	    loadImages: function(projection) {
-	        var url = apibase$2 + '/1.0/list/nearby-photos/';
-	        loadTiles$1('images', url, projection);
-	    },
+	    var ModeOfOperationCBC = function ModeOfOperationCBC(key, iv) {
+	      if (!(this instanceof ModeOfOperationCBC)) {
+	        throw Error('AES must be instanitated with `new`');
+	      }
 
+	      this.description = "Cipher Block Chaining";
+	      this.name = "cbc";
 
-	    loadViewer: function(context) {
-	        var that = this;
+	      if (!iv) {
+	        iv = createArray(16);
+	      } else if (iv.length != 16) {
+	        throw new Error('invalid initialation vector size (must be 16 bytes)');
+	      }
 
-	        // add osc-wrapper
-	        var wrap = context.container().select('.photoviewer').selectAll('.osc-wrapper')
-	            .data([0]);
+	      this._lastCipherblock = coerceArray(iv, true);
+	      this._aes = new AES(key);
+	    };
 
-	        var wrapEnter = wrap.enter()
-	            .append('div')
-	            .attr('class', 'photo-wrapper osc-wrapper')
-	            .classed('hide', true)
-	            .call(imgZoom.on('zoom', zoomPan))
-	            .on('dblclick.zoom', null);
+	    ModeOfOperationCBC.prototype.encrypt = function (plaintext) {
+	      plaintext = coerceArray(plaintext);
 
-	        wrapEnter
-	            .append('div')
-	            .attr('class', 'photo-attribution fillD');
+	      if (plaintext.length % 16 !== 0) {
+	        throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
+	      }
 
-	        var controlsEnter = wrapEnter
-	            .append('div')
-	            .attr('class', 'photo-controls-wrap')
-	            .append('div')
-	            .attr('class', 'photo-controls');
+	      var ciphertext = createArray(plaintext.length);
+	      var block = createArray(16);
 
-	        controlsEnter
-	            .append('button')
-	            .on('click.back', step(-1))
-	            .text('◄');
+	      for (var i = 0; i < plaintext.length; i += 16) {
+	        copyArray(plaintext, block, 0, i, i + 16);
 
-	        controlsEnter
-	            .append('button')
-	            .on('click.rotate-ccw', rotate(-90))
-	            .text('⤿');
+	        for (var j = 0; j < 16; j++) {
+	          block[j] ^= this._lastCipherblock[j];
+	        }
 
-	        controlsEnter
-	            .append('button')
-	            .on('click.rotate-cw', rotate(90))
-	            .text('⤾');
+	        this._lastCipherblock = this._aes.encrypt(block);
+	        copyArray(this._lastCipherblock, ciphertext, i);
+	      }
 
-	        controlsEnter
-	            .append('button')
-	            .on('click.forward', step(1))
-	            .text('►');
+	      return ciphertext;
+	    };
 
-	        wrapEnter
-	            .append('div')
-	            .attr('class', 'osc-image-wrap');
+	    ModeOfOperationCBC.prototype.decrypt = function (ciphertext) {
+	      ciphertext = coerceArray(ciphertext);
 
+	      if (ciphertext.length % 16 !== 0) {
+	        throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
+	      }
 
-	        // Register viewer resize handler
-	        context.ui().photoviewer.on('resize.openstreetcam', function(dimensions) {
-	            imgZoom = d3_zoom()
-	                .extent([[0, 0], dimensions])
-	                .translateExtent([[0, 0], dimensions])
-	                .scaleExtent([1, 15])
-	                .on('zoom', zoomPan);
-	        });
+	      var plaintext = createArray(ciphertext.length);
+	      var block = createArray(16);
 
+	      for (var i = 0; i < ciphertext.length; i += 16) {
+	        copyArray(ciphertext, block, 0, i, i + 16);
+	        block = this._aes.decrypt(block);
 
-	        function zoomPan() {
-	            var t = event.transform;
-	            context.container().select('.photoviewer .osc-image-wrap')
-	                .call(utilSetTransform, t.x, t.y, t.k);
+	        for (var j = 0; j < 16; j++) {
+	          plaintext[i + j] = block[j] ^ this._lastCipherblock[j];
 	        }
 
+	        copyArray(ciphertext, this._lastCipherblock, 0, i, i + 16);
+	      }
 
-	        function rotate(deg) {
-	            return function() {
-	                if (!_oscSelectedImage) { return; }
-	                var sequenceKey = _oscSelectedImage.sequence_id;
-	                var sequence = _oscCache.sequences[sequenceKey];
-	                if (!sequence) { return; }
-
-	                var r = sequence.rotation || 0;
-	                r += deg;
-
-	                if (r > 180) { r -= 360; }
-	                if (r < -180) { r += 360; }
-	                sequence.rotation = r;
+	      return plaintext;
+	    };
+	    /**
+	     *  Mode Of Operation - Cipher Feedback (CFB)
+	     */
 
-	                var wrap = context.container().select('.photoviewer .osc-wrapper');
 
-	                wrap
-	                    .transition()
-	                    .duration(100)
-	                    .call(imgZoom.transform, identity$2);
+	    var ModeOfOperationCFB = function ModeOfOperationCFB(key, iv, segmentSize) {
+	      if (!(this instanceof ModeOfOperationCFB)) {
+	        throw Error('AES must be instanitated with `new`');
+	      }
 
-	                wrap.selectAll('.osc-image')
-	                    .transition()
-	                    .duration(100)
-	                    .style('transform', 'rotate(' + r + 'deg)');
-	            };
-	        }
+	      this.description = "Cipher Feedback";
+	      this.name = "cfb";
 
-	        function step(stepBy) {
-	            return function() {
-	                if (!_oscSelectedImage) { return; }
-	                var sequenceKey = _oscSelectedImage.sequence_id;
-	                var sequence = _oscCache.sequences[sequenceKey];
-	                if (!sequence) { return; }
+	      if (!iv) {
+	        iv = createArray(16);
+	      } else if (iv.length != 16) {
+	        throw new Error('invalid initialation vector size (must be 16 size)');
+	      }
 
-	                var nextIndex = _oscSelectedImage.sequence_index + stepBy;
-	                var nextImage = sequence.images[nextIndex];
-	                if (!nextImage) { return; }
+	      if (!segmentSize) {
+	        segmentSize = 1;
+	      }
 
-	                context.map().centerEase(nextImage.loc);
+	      this.segmentSize = segmentSize;
+	      this._shiftRegister = coerceArray(iv, true);
+	      this._aes = new AES(key);
+	    };
 
-	                that
-	                    .selectImage(context, nextImage)
-	                    .updateViewer(context, nextImage);
-	            };
-	        }
-	    },
+	    ModeOfOperationCFB.prototype.encrypt = function (plaintext) {
+	      if (plaintext.length % this.segmentSize != 0) {
+	        throw new Error('invalid plaintext size (must be segmentSize bytes)');
+	      }
 
+	      var encrypted = coerceArray(plaintext, true);
+	      var xorSegment;
 
-	    showViewer: function(context) {
-	        var viewer = context.container().select('.photoviewer')
-	            .classed('hide', false);
+	      for (var i = 0; i < encrypted.length; i += this.segmentSize) {
+	        xorSegment = this._aes.encrypt(this._shiftRegister);
 
-	        var isHidden = viewer.selectAll('.photo-wrapper.osc-wrapper.hide').size();
+	        for (var j = 0; j < this.segmentSize; j++) {
+	          encrypted[i + j] ^= xorSegment[j];
+	        } // Shift the register
 
-	        if (isHidden) {
-	            viewer
-	                .selectAll('.photo-wrapper:not(.osc-wrapper)')
-	                .classed('hide', true);
 
-	            viewer
-	                .selectAll('.photo-wrapper.osc-wrapper')
-	                .classed('hide', false);
-	        }
+	        copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
+	        copyArray(encrypted, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
+	      }
 
-	        return this;
-	    },
+	      return encrypted;
+	    };
 
+	    ModeOfOperationCFB.prototype.decrypt = function (ciphertext) {
+	      if (ciphertext.length % this.segmentSize != 0) {
+	        throw new Error('invalid ciphertext size (must be segmentSize bytes)');
+	      }
 
-	    hideViewer: function(context) {
-	        _oscSelectedImage = null;
+	      var plaintext = coerceArray(ciphertext, true);
+	      var xorSegment;
 
-	        var viewer = context.container().select('.photoviewer');
-	        if (!viewer.empty()) { viewer.datum(null); }
+	      for (var i = 0; i < plaintext.length; i += this.segmentSize) {
+	        xorSegment = this._aes.encrypt(this._shiftRegister);
 
-	        viewer
-	            .classed('hide', true)
-	            .selectAll('.photo-wrapper')
-	            .classed('hide', true);
+	        for (var j = 0; j < this.segmentSize; j++) {
+	          plaintext[i + j] ^= xorSegment[j];
+	        } // Shift the register
 
-	        context.container().selectAll('.viewfield-group, .sequence, .icon-sign')
-	            .classed('currentView', false);
 
-	        return this.setStyles(context, null, true);
-	    },
+	        copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
+	        copyArray(ciphertext, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
+	      }
 
+	      return plaintext;
+	    };
+	    /**
+	     *  Mode Of Operation - Output Feedback (OFB)
+	     */
 
-	    updateViewer: function(context, d) {
-	        var wrap = context.container().select('.photoviewer .osc-wrapper');
-	        var imageWrap = wrap.selectAll('.osc-image-wrap');
-	        var attribution = wrap.selectAll('.photo-attribution').html('');
-
-	        wrap
-	            .transition()
-	            .duration(100)
-	            .call(imgZoom.transform, identity$2);
-
-	        imageWrap
-	            .selectAll('.osc-image')
-	            .remove();
-
-	        if (d) {
-	            var sequence = _oscCache.sequences[d.sequence_id];
-	            var r = (sequence && sequence.rotation) || 0;
-
-	            imageWrap
-	                .append('img')
-	                .attr('class', 'osc-image')
-	                .attr('src', apibase$2 + '/' + d.imagePath)
-	                .style('transform', 'rotate(' + r + 'deg)');
-
-	            if (d.captured_by) {
-	                attribution
-	                    .append('a')
-	                    .attr('class', 'captured_by')
-	                    .attr('target', '_blank')
-	                    .attr('href', 'https://openstreetcam.org/user/' + encodeURIComponent(d.captured_by))
-	                    .text('@' + d.captured_by);
-
-	                attribution
-	                    .append('span')
-	                    .text('|');
-	            }
 
-	            if (d.captured_at) {
-	                attribution
-	                    .append('span')
-	                    .attr('class', 'captured_at')
-	                    .text(localeDateString(d.captured_at));
+	    var ModeOfOperationOFB = function ModeOfOperationOFB(key, iv) {
+	      if (!(this instanceof ModeOfOperationOFB)) {
+	        throw Error('AES must be instanitated with `new`');
+	      }
 
-	                attribution
-	                    .append('span')
-	                    .text('|');
-	            }
+	      this.description = "Output Feedback";
+	      this.name = "ofb";
 
-	            attribution
-	                .append('a')
-	                .attr('class', 'image-link')
-	                .attr('target', '_blank')
-	                .attr('href', 'https://openstreetcam.org/details/' + d.sequence_id + '/' + d.sequence_index)
-	                .text('openstreetcam.org');
-	        }
+	      if (!iv) {
+	        iv = createArray(16);
+	      } else if (iv.length != 16) {
+	        throw new Error('invalid initialation vector size (must be 16 bytes)');
+	      }
 
-	        return this;
+	      this._lastPrecipher = coerceArray(iv, true);
+	      this._lastPrecipherIndex = 16;
+	      this._aes = new AES(key);
+	    };
 
+	    ModeOfOperationOFB.prototype.encrypt = function (plaintext) {
+	      var encrypted = coerceArray(plaintext, true);
 
-	        function localeDateString(s) {
-	            if (!s) { return null; }
-	            var options = { day: 'numeric', month: 'short', year: 'numeric' };
-	            var d = new Date(s);
-	            if (isNaN(d.getTime())) { return null; }
-	            return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+	      for (var i = 0; i < encrypted.length; i++) {
+	        if (this._lastPrecipherIndex === 16) {
+	          this._lastPrecipher = this._aes.encrypt(this._lastPrecipher);
+	          this._lastPrecipherIndex = 0;
 	        }
-	    },
 
+	        encrypted[i] ^= this._lastPrecipher[this._lastPrecipherIndex++];
+	      }
 
-	    selectImage: function(context, d) {
-	        _oscSelectedImage = d;
-	        var viewer = context.container().select('.photoviewer');
-	        if (!viewer.empty()) { viewer.datum(d); }
+	      return encrypted;
+	    }; // Decryption is symetric
 
-	        this.setStyles(context, null, true);
 
-	        context.container().selectAll('.icon-sign')
-	            .classed('currentView', false);
+	    ModeOfOperationOFB.prototype.decrypt = ModeOfOperationOFB.prototype.encrypt;
+	    /**
+	     *  Counter object for CTR common mode of operation
+	     */
 
-	        return this;
-	    },
+	    var Counter = function Counter(initialValue) {
+	      if (!(this instanceof Counter)) {
+	        throw Error('Counter must be instanitated with `new`');
+	      } // We allow 0, but anything false-ish uses the default 1
 
 
-	    getSelectedImage: function() {
-	        return _oscSelectedImage;
-	    },
+	      if (initialValue !== 0 && !initialValue) {
+	        initialValue = 1;
+	      }
 
+	      if (typeof initialValue === 'number') {
+	        this._counter = createArray(16);
+	        this.setValue(initialValue);
+	      } else {
+	        this.setBytes(initialValue);
+	      }
+	    };
 
-	    getSequenceKeyForImage: function(d) {
-	        return d && d.sequence_id;
-	    },
+	    Counter.prototype.setValue = function (value) {
+	      if (typeof value !== 'number' || parseInt(value) != value) {
+	        throw new Error('invalid counter value (must be an integer)');
+	      } // We cannot safely handle numbers beyond the safe range for integers
 
 
-	    // Updates the currently highlighted sequence and selected bubble.
-	    // Reset is only necessary when interacting with the viewport because
-	    // this implicitly changes the currently selected bubble/sequence
-	    setStyles: function(context, hovered, reset) {
-	        if (reset) {  // reset all layers
-	            context.container().selectAll('.viewfield-group')
-	                .classed('highlighted', false)
-	                .classed('hovered', false)
-	                .classed('currentView', false);
+	      if (value > Number.MAX_SAFE_INTEGER) {
+	        throw new Error('integer value out of safe range');
+	      }
 
-	            context.container().selectAll('.sequence')
-	                .classed('highlighted', false)
-	                .classed('currentView', false);
-	        }
+	      for (var index = 15; index >= 0; --index) {
+	        this._counter[index] = value % 256;
+	        value = parseInt(value / 256);
+	      }
+	    };
 
-	        var hoveredImageKey = hovered && hovered.key;
-	        var hoveredSequenceKey = this.getSequenceKeyForImage(hovered);
-	        var hoveredSequence = hoveredSequenceKey && _oscCache.sequences[hoveredSequenceKey];
-	        var hoveredImageKeys = (hoveredSequence && hoveredSequence.images.map(function (d) { return d.key; })) || [];
+	    Counter.prototype.setBytes = function (bytes) {
+	      bytes = coerceArray(bytes, true);
 
-	        var viewer = context.container().select('.photoviewer');
-	        var selected = viewer.empty() ? undefined : viewer.datum();
-	        var selectedImageKey = selected && selected.key;
-	        var selectedSequenceKey = this.getSequenceKeyForImage(selected);
-	        var selectedSequence = selectedSequenceKey && _oscCache.sequences[selectedSequenceKey];
-	        var selectedImageKeys = (selectedSequence && selectedSequence.images.map(function (d) { return d.key; })) || [];
-
-	        // highlight sibling viewfields on either the selected or the hovered sequences
-	        var highlightedImageKeys = utilArrayUnion(hoveredImageKeys, selectedImageKeys);
-
-	        context.container().selectAll('.layer-openstreetcam .viewfield-group')
-	            .classed('highlighted', function(d) { return highlightedImageKeys.indexOf(d.key) !== -1; })
-	            .classed('hovered', function(d) { return d.key === hoveredImageKey; })
-	            .classed('currentView', function(d) { return d.key === selectedImageKey; });
-
-	        context.container().selectAll('.layer-openstreetcam .sequence')
-	            .classed('highlighted', function(d) { return d.properties.key === hoveredSequenceKey; })
-	            .classed('currentView', function(d) { return d.properties.key === selectedSequenceKey; });
-
-	        // update viewfields if needed
-	        context.container().selectAll('.viewfield-group .viewfield')
-	            .attr('d', viewfieldPath);
-
-	        function viewfieldPath() {
-	            var d = this.parentNode.__data__;
-	            if (d.pano && d.key !== selectedImageKey) {
-	                return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-	            } else {
-	                return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
-	            }
-	        }
+	      if (bytes.length != 16) {
+	        throw new Error('invalid counter bytes size (must be 16 bytes)');
+	      }
 
-	        return this;
-	    },
+	      this._counter = bytes;
+	    };
 
+	    Counter.prototype.increment = function () {
+	      for (var i = 15; i >= 0; i--) {
+	        if (this._counter[i] === 255) {
+	          this._counter[i] = 0;
+	        } else {
+	          this._counter[i]++;
+	          break;
+	        }
+	      }
+	    };
+	    /**
+	     *  Mode Of Operation - Counter (CTR)
+	     */
 
-	    cache: function() {
-	        return _oscCache;
-	    }
 
-	};
+	    var ModeOfOperationCTR = function ModeOfOperationCTR(key, counter) {
+	      if (!(this instanceof ModeOfOperationCTR)) {
+	        throw Error('AES must be instanitated with `new`');
+	      }
 
-	/**
-	 * Checks if `value` is the
-	 * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
-	 * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
-	 *
-	 * @static
-	 * @memberOf _
-	 * @since 0.1.0
-	 * @category Lang
-	 * @param {*} value The value to check.
-	 * @returns {boolean} Returns `true` if `value` is an object, else `false`.
-	 * @example
-	 *
-	 * _.isObject({});
-	 * // => true
-	 *
-	 * _.isObject([1, 2, 3]);
-	 * // => true
-	 *
-	 * _.isObject(_.noop);
-	 * // => true
-	 *
-	 * _.isObject(null);
-	 * // => false
-	 */
-	function isObject$1(value) {
-	  var type = typeof value;
-	  return value != null && (type == 'object' || type == 'function');
-	}
+	      this.description = "Counter";
+	      this.name = "ctr";
 
-	/** Detect free variable `global` from Node.js. */
-	var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+	      if (!(counter instanceof Counter)) {
+	        counter = new Counter(counter);
+	      }
 
-	/** Detect free variable `self`. */
-	var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+	      this._counter = counter;
+	      this._remainingCounter = null;
+	      this._remainingCounterIndex = 16;
+	      this._aes = new AES(key);
+	    };
 
-	/** Used as a reference to the global object. */
-	var root$2 = freeGlobal || freeSelf || Function('return this')();
+	    ModeOfOperationCTR.prototype.encrypt = function (plaintext) {
+	      var encrypted = coerceArray(plaintext, true);
 
-	/**
-	 * Gets the timestamp of the number of milliseconds that have elapsed since
-	 * the Unix epoch (1 January 1970 00:00:00 UTC).
-	 *
-	 * @static
-	 * @memberOf _
-	 * @since 2.4.0
-	 * @category Date
-	 * @returns {number} Returns the timestamp.
-	 * @example
-	 *
-	 * _.defer(function(stamp) {
-	 *   console.log(_.now() - stamp);
-	 * }, _.now());
-	 * // => Logs the number of milliseconds it took for the deferred invocation.
-	 */
-	var now$1 = function() {
-	  return root$2.Date.now();
-	};
+	      for (var i = 0; i < encrypted.length; i++) {
+	        if (this._remainingCounterIndex === 16) {
+	          this._remainingCounter = this._aes.encrypt(this._counter._counter);
+	          this._remainingCounterIndex = 0;
 
-	/** Built-in value references. */
-	var Symbol$1 = root$2.Symbol;
+	          this._counter.increment();
+	        }
 
-	/** Used for built-in method references. */
-	var objectProto = Object.prototype;
+	        encrypted[i] ^= this._remainingCounter[this._remainingCounterIndex++];
+	      }
 
-	/** Used to check objects for own properties. */
-	var hasOwnProperty$2 = objectProto.hasOwnProperty;
+	      return encrypted;
+	    }; // Decryption is symetric
 
-	/**
-	 * Used to resolve the
-	 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
-	 * of values.
-	 */
-	var nativeObjectToString = objectProto.toString;
 
-	/** Built-in value references. */
-	var symToStringTag = Symbol$1 ? Symbol$1.toStringTag : undefined;
+	    ModeOfOperationCTR.prototype.decrypt = ModeOfOperationCTR.prototype.encrypt; ///////////////////////
+	    // Padding
+	    // See:https://tools.ietf.org/html/rfc2315
 
-	/**
-	 * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
-	 *
-	 * @private
-	 * @param {*} value The value to query.
-	 * @returns {string} Returns the raw `toStringTag`.
-	 */
-	function getRawTag(value) {
-	  var isOwn = hasOwnProperty$2.call(value, symToStringTag),
-	      tag = value[symToStringTag];
+	    function pkcs7pad(data) {
+	      data = coerceArray(data, true);
+	      var padder = 16 - data.length % 16;
+	      var result = createArray(data.length + padder);
+	      copyArray(data, result);
 
-	  try {
-	    value[symToStringTag] = undefined;
-	    var unmasked = true;
-	  } catch (e) {}
+	      for (var i = data.length; i < result.length; i++) {
+	        result[i] = padder;
+	      }
 
-	  var result = nativeObjectToString.call(value);
-	  if (unmasked) {
-	    if (isOwn) {
-	      value[symToStringTag] = tag;
-	    } else {
-	      delete value[symToStringTag];
+	      return result;
 	    }
-	  }
-	  return result;
-	}
 
-	/** Used for built-in method references. */
-	var objectProto$1 = Object.prototype;
+	    function pkcs7strip(data) {
+	      data = coerceArray(data, true);
 
-	/**
-	 * Used to resolve the
-	 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
-	 * of values.
-	 */
-	var nativeObjectToString$1 = objectProto$1.toString;
+	      if (data.length < 16) {
+	        throw new Error('PKCS#7 invalid length');
+	      }
 
-	/**
-	 * Converts `value` to a string using `Object.prototype.toString`.
-	 *
-	 * @private
-	 * @param {*} value The value to convert.
-	 * @returns {string} Returns the converted string.
-	 */
-	function objectToString$2(value) {
-	  return nativeObjectToString$1.call(value);
-	}
+	      var padder = data[data.length - 1];
 
-	/** `Object#toString` result references. */
-	var nullTag = '[object Null]',
-	    undefinedTag = '[object Undefined]';
+	      if (padder > 16) {
+	        throw new Error('PKCS#7 padding byte out of range');
+	      }
 
-	/** Built-in value references. */
-	var symToStringTag$1 = Symbol$1 ? Symbol$1.toStringTag : undefined;
+	      var length = data.length - padder;
 
-	/**
-	 * The base implementation of `getTag` without fallbacks for buggy environments.
-	 *
-	 * @private
-	 * @param {*} value The value to query.
-	 * @returns {string} Returns the `toStringTag`.
-	 */
-	function baseGetTag(value) {
-	  if (value == null) {
-	    return value === undefined ? undefinedTag : nullTag;
-	  }
-	  return (symToStringTag$1 && symToStringTag$1 in Object(value))
-	    ? getRawTag(value)
-	    : objectToString$2(value);
-	}
+	      for (var i = 0; i < padder; i++) {
+	        if (data[length + i] !== padder) {
+	          throw new Error('PKCS#7 invalid padding byte');
+	        }
+	      }
 
-	/**
-	 * Checks if `value` is object-like. A value is object-like if it's not `null`
-	 * and has a `typeof` result of "object".
-	 *
-	 * @static
-	 * @memberOf _
-	 * @since 4.0.0
-	 * @category Lang
-	 * @param {*} value The value to check.
-	 * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
-	 * @example
-	 *
-	 * _.isObjectLike({});
-	 * // => true
-	 *
-	 * _.isObjectLike([1, 2, 3]);
-	 * // => true
-	 *
-	 * _.isObjectLike(_.noop);
-	 * // => false
-	 *
-	 * _.isObjectLike(null);
-	 * // => false
-	 */
-	function isObjectLike(value) {
-	  return value != null && typeof value == 'object';
-	}
+	      var result = createArray(length);
+	      copyArray(data, result, 0, 0, length);
+	      return result;
+	    } ///////////////////////
+	    // Exporting
+	    // The block cipher
 
-	/** `Object#toString` result references. */
-	var symbolTag = '[object Symbol]';
 
-	/**
-	 * Checks if `value` is classified as a `Symbol` primitive or object.
-	 *
-	 * @static
-	 * @memberOf _
-	 * @since 4.0.0
-	 * @category Lang
-	 * @param {*} value The value to check.
-	 * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
-	 * @example
-	 *
-	 * _.isSymbol(Symbol.iterator);
-	 * // => true
-	 *
-	 * _.isSymbol('abc');
-	 * // => false
-	 */
-	function isSymbol$4(value) {
-	  return typeof value == 'symbol' ||
-	    (isObjectLike(value) && baseGetTag(value) == symbolTag);
-	}
+	    var aesjs = {
+	      AES: AES,
+	      Counter: Counter,
+	      ModeOfOperation: {
+	        ecb: ModeOfOperationECB,
+	        cbc: ModeOfOperationCBC,
+	        cfb: ModeOfOperationCFB,
+	        ofb: ModeOfOperationOFB,
+	        ctr: ModeOfOperationCTR
+	      },
+	      utils: {
+	        hex: convertHex,
+	        utf8: convertUtf8
+	      },
+	      padding: {
+	        pkcs7: {
+	          pad: pkcs7pad,
+	          strip: pkcs7strip
+	        }
+	      },
+	      _arrayTest: {
+	        coerceArray: coerceArray,
+	        createArray: createArray,
+	        copyArray: copyArray
+	      }
+	    }; // node.js
 
-	/** Used as references for various `Number` constants. */
-	var NAN = 0 / 0;
+	    {
+	      module.exports = aesjs; // RequireJS/AMD
+	      // http://www.requirejs.org/docs/api.html
+	      // https://github.com/amdjs/amdjs-api/wiki/AMD
+	    }
+	  })();
+	})(aesJs);
 
-	/** Used to match leading and trailing whitespace. */
-	var reTrim = /^\s+|\s+$/g;
+	var aesjs = aesJs.exports;
 
-	/** Used to detect bad signed hexadecimal string values. */
-	var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
+	// We can use keys that are 128 bits (16 bytes), 192 bits (24 bytes) or 256 bits (32 bytes).
+	// To generate a random key:  window.crypto.getRandomValues(new Uint8Array(16));
+	// This default signing key is built into iD and can be used to mask/unmask sensitive values.
 
-	/** Used to detect binary string values. */
-	var reIsBinary = /^0b[01]+$/i;
+	var DEFAULT_128 = [250, 157, 60, 79, 142, 134, 229, 129, 138, 126, 210, 129, 29, 71, 160, 208];
+	function utilAesEncrypt(text, key) {
+	  key = key || DEFAULT_128;
+	  var textBytes = aesjs.utils.utf8.toBytes(text);
+	  var aesCtr = new aesjs.ModeOfOperation.ctr(key);
+	  var encryptedBytes = aesCtr.encrypt(textBytes);
+	  var encryptedHex = aesjs.utils.hex.fromBytes(encryptedBytes);
+	  return encryptedHex;
+	}
+	function utilAesDecrypt(encryptedHex, key) {
+	  key = key || DEFAULT_128;
+	  var encryptedBytes = aesjs.utils.hex.toBytes(encryptedHex);
+	  var aesCtr = new aesjs.ModeOfOperation.ctr(key);
+	  var decryptedBytes = aesCtr.decrypt(encryptedBytes);
+	  var text = aesjs.utils.utf8.fromBytes(decryptedBytes);
+	  return text;
+	}
 
-	/** Used to detect octal string values. */
-	var reIsOctal = /^0o[0-7]+$/i;
+	function utilCleanTags(tags) {
+	  var out = {};
 
-	/** Built-in method references without a dependency on `root`. */
-	var freeParseInt = parseInt;
+	  for (var k in tags) {
+	    if (!k) continue;
+	    var v = tags[k];
 
-	/**
-	 * Converts `value` to a number.
-	 *
-	 * @static
-	 * @memberOf _
-	 * @since 4.0.0
-	 * @category Lang
-	 * @param {*} value The value to process.
-	 * @returns {number} Returns the number.
-	 * @example
-	 *
-	 * _.toNumber(3.2);
-	 * // => 3.2
-	 *
-	 * _.toNumber(Number.MIN_VALUE);
-	 * // => 5e-324
-	 *
-	 * _.toNumber(Infinity);
-	 * // => Infinity
-	 *
-	 * _.toNumber('3.2');
-	 * // => 3.2
-	 */
-	function toNumber(value) {
-	  if (typeof value == 'number') {
-	    return value;
-	  }
-	  if (isSymbol$4(value)) {
-	    return NAN;
-	  }
-	  if (isObject$1(value)) {
-	    var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
-	    value = isObject$1(other) ? (other + '') : other;
-	  }
-	  if (typeof value != 'string') {
-	    return value === 0 ? value : +value;
+	    if (v !== undefined) {
+	      out[k] = cleanValue(k, v);
+	    }
 	  }
-	  value = value.replace(reTrim, '');
-	  var isBinary = reIsBinary.test(value);
-	  return (isBinary || reIsOctal.test(value))
-	    ? freeParseInt(value.slice(2), isBinary ? 2 : 8)
-	    : (reIsBadHex.test(value) ? NAN : +value);
-	}
 
-	/** Error message constants. */
-	var FUNC_ERROR_TEXT = 'Expected a function';
+	  return out;
 
-	/* Built-in method references for those with the same name as other `lodash` methods. */
-	var nativeMax = Math.max,
-	    nativeMin = Math.min;
+	  function cleanValue(k, v) {
+	    function keepSpaces(k) {
+	      return /_hours|_times|:conditional$/.test(k);
+	    }
 
-	/**
-	 * Creates a debounced function that delays invoking `func` until after `wait`
-	 * milliseconds have elapsed since the last time the debounced function was
-	 * invoked. The debounced function comes with a `cancel` method to cancel
-	 * delayed `func` invocations and a `flush` method to immediately invoke them.
-	 * Provide `options` to indicate whether `func` should be invoked on the
-	 * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
-	 * with the last arguments provided to the debounced function. Subsequent
-	 * calls to the debounced function return the result of the last `func`
-	 * invocation.
-	 *
-	 * **Note:** If `leading` and `trailing` options are `true`, `func` is
-	 * invoked on the trailing edge of the timeout only if the debounced function
-	 * is invoked more than once during the `wait` timeout.
-	 *
-	 * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
-	 * until to the next tick, similar to `setTimeout` with a timeout of `0`.
-	 *
-	 * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
-	 * for details over the differences between `_.debounce` and `_.throttle`.
-	 *
-	 * @static
-	 * @memberOf _
-	 * @since 0.1.0
-	 * @category Function
-	 * @param {Function} func The function to debounce.
-	 * @param {number} [wait=0] The number of milliseconds to delay.
-	 * @param {Object} [options={}] The options object.
-	 * @param {boolean} [options.leading=false]
-	 *  Specify invoking on the leading edge of the timeout.
-	 * @param {number} [options.maxWait]
-	 *  The maximum time `func` is allowed to be delayed before it's invoked.
-	 * @param {boolean} [options.trailing=true]
-	 *  Specify invoking on the trailing edge of the timeout.
-	 * @returns {Function} Returns the new debounced function.
-	 * @example
-	 *
-	 * // Avoid costly calculations while the window size is in flux.
-	 * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
-	 *
-	 * // Invoke `sendMail` when clicked, debouncing subsequent calls.
-	 * jQuery(element).on('click', _.debounce(sendMail, 300, {
-	 *   'leading': true,
-	 *   'trailing': false
-	 * }));
-	 *
-	 * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
-	 * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
-	 * var source = new EventSource('/stream');
-	 * jQuery(source).on('message', debounced);
-	 *
-	 * // Cancel the trailing debounced invocation.
-	 * jQuery(window).on('popstate', debounced.cancel);
-	 */
-	function debounce(func, wait, options) {
-	  var lastArgs,
-	      lastThis,
-	      maxWait,
-	      result,
-	      timerId,
-	      lastCallTime,
-	      lastInvokeTime = 0,
-	      leading = false,
-	      maxing = false,
-	      trailing = true;
+	    function skip(k) {
+	      return /^(description|note|fixme)$/.test(k);
+	    }
 
-	  if (typeof func != 'function') {
-	    throw new TypeError(FUNC_ERROR_TEXT);
-	  }
-	  wait = toNumber(wait) || 0;
-	  if (isObject$1(options)) {
-	    leading = !!options.leading;
-	    maxing = 'maxWait' in options;
-	    maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
-	    trailing = 'trailing' in options ? !!options.trailing : trailing;
-	  }
+	    if (skip(k)) return v;
+	    var cleaned = v.split(';').map(function (s) {
+	      return s.trim();
+	    }).join(keepSpaces(k) ? '; ' : ';'); // The code below is not intended to validate websites and emails.
+	    // It is only intended to prevent obvious copy-paste errors. (#2323)
+	    // clean website- and email-like tags
 
-	  function invokeFunc(time) {
-	    var args = lastArgs,
-	        thisArg = lastThis;
+	    if (k.indexOf('website') !== -1 || k.indexOf('email') !== -1 || cleaned.indexOf('http') === 0) {
+	      cleaned = cleaned.replace(/[\u200B-\u200F\uFEFF]/g, ''); // strip LRM and other zero width chars
+	    }
 
-	    lastArgs = lastThis = undefined;
-	    lastInvokeTime = time;
-	    result = func.apply(thisArg, args);
-	    return result;
+	    return cleaned;
 	  }
+	}
 
-	  function leadingEdge(time) {
-	    // Reset any `maxWait` timer.
-	    lastInvokeTime = time;
-	    // Start the timer for the trailing edge.
-	    timerId = setTimeout(timerExpired, wait);
-	    // Invoke the leading edge.
-	    return leading ? invokeFunc(time) : result;
-	  }
+	var _detected;
 
-	  function remainingWait(time) {
-	    var timeSinceLastCall = time - lastCallTime,
-	        timeSinceLastInvoke = time - lastInvokeTime,
-	        timeWaiting = wait - timeSinceLastCall;
+	function utilDetect(refresh) {
+	  if (_detected && !refresh) return _detected;
+	  _detected = {};
+	  var ua = navigator.userAgent;
+	  var m = null;
+	  /* Browser */
+
+	  m = ua.match(/(edge)\/?\s*(\.?\d+(\.\d+)*)/i); // Edge
 
-	    return maxing
-	      ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke)
-	      : timeWaiting;
+	  if (m !== null) {
+	    _detected.browser = m[1];
+	    _detected.version = m[2];
 	  }
 
-	  function shouldInvoke(time) {
-	    var timeSinceLastCall = time - lastCallTime,
-	        timeSinceLastInvoke = time - lastInvokeTime;
+	  if (!_detected.browser) {
+	    m = ua.match(/Trident\/.*rv:([0-9]{1,}[\.0-9]{0,})/i); // IE11
 
-	    // Either this is the first call, activity has stopped and we're at the
-	    // trailing edge, the system time has gone backwards and we're treating
-	    // it as the trailing edge, or we've hit the `maxWait` limit.
-	    return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||
-	      (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));
+	    if (m !== null) {
+	      _detected.browser = 'msie';
+	      _detected.version = m[1];
+	    }
 	  }
 
-	  function timerExpired() {
-	    var time = now$1();
-	    if (shouldInvoke(time)) {
-	      return trailingEdge(time);
+	  if (!_detected.browser) {
+	    m = ua.match(/(opr)\/?\s*(\.?\d+(\.\d+)*)/i); // Opera 15+
+
+	    if (m !== null) {
+	      _detected.browser = 'Opera';
+	      _detected.version = m[2];
 	    }
-	    // Restart the timer.
-	    timerId = setTimeout(timerExpired, remainingWait(time));
 	  }
 
-	  function trailingEdge(time) {
-	    timerId = undefined;
+	  if (!_detected.browser) {
+	    m = ua.match(/(opera|chrome|safari|firefox|msie)\/?\s*(\.?\d+(\.\d+)*)/i);
 
-	    // Only invoke if we have `lastArgs` which means `func` has been
-	    // debounced at least once.
-	    if (trailing && lastArgs) {
-	      return invokeFunc(time);
+	    if (m !== null) {
+	      _detected.browser = m[1];
+	      _detected.version = m[2];
+	      m = ua.match(/version\/([\.\d]+)/i);
+	      if (m !== null) _detected.version = m[1];
 	    }
-	    lastArgs = lastThis = undefined;
-	    return result;
 	  }
 
-	  function cancel() {
-	    if (timerId !== undefined) {
-	      clearTimeout(timerId);
-	    }
-	    lastInvokeTime = 0;
-	    lastArgs = lastCallTime = lastThis = timerId = undefined;
+	  if (!_detected.browser) {
+	    _detected.browser = navigator.appName;
+	    _detected.version = navigator.appVersion;
+	  } // keep major.minor version only..
+
+
+	  _detected.version = _detected.version.split(/\W/).slice(0, 2).join('.'); // detect other browser capabilities
+	  // Legacy Opera has incomplete svg style support. See #715
+
+	  _detected.opera = _detected.browser.toLowerCase() === 'opera' && parseFloat(_detected.version) < 15;
+
+	  if (_detected.browser.toLowerCase() === 'msie') {
+	    _detected.ie = true;
+	    _detected.browser = 'Internet Explorer';
+	    _detected.support = parseFloat(_detected.version) >= 11;
+	  } else {
+	    _detected.ie = false;
+	    _detected.support = true;
 	  }
 
-	  function flush() {
-	    return timerId === undefined ? result : trailingEdge(now$1());
+	  _detected.filedrop = window.FileReader && 'ondrop' in window;
+	  _detected.download = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
+	  _detected.cssfilters = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
+	  /* Platform */
+
+	  if (/Win/.test(ua)) {
+	    _detected.os = 'win';
+	    _detected.platform = 'Windows';
+	  } else if (/Mac/.test(ua)) {
+	    _detected.os = 'mac';
+	    _detected.platform = 'Macintosh';
+	  } else if (/X11/.test(ua) || /Linux/.test(ua)) {
+	    _detected.os = 'linux';
+	    _detected.platform = 'Linux';
+	  } else {
+	    _detected.os = 'win';
+	    _detected.platform = 'Unknown';
 	  }
 
-	  function debounced() {
-	    var time = now$1(),
-	        isInvoking = shouldInvoke(time);
+	  _detected.isMobileWebKit = (/\b(iPad|iPhone|iPod)\b/.test(ua) || // HACK: iPadOS 13+ requests desktop sites by default by using a Mac user agent,
+	  // so assume any "mac" with multitouch is actually iOS
+	  navigator.platform === 'MacIntel' && 'maxTouchPoints' in navigator && navigator.maxTouchPoints > 1) && /WebKit/.test(ua) && !/Edge/.test(ua) && !window.MSStream;
+	  /* Locale */
+	  // An array of locales requested by the browser in priority order.
 
-	    lastArgs = arguments;
-	    lastThis = this;
-	    lastCallTime = time;
+	  _detected.browserLocales = Array.from(new Set( // remove duplicates
+	  [navigator.language].concat(navigator.languages || []).concat([// old property for backwards compatibility
+	  navigator.userLanguage]) // remove any undefined values
+	  .filter(Boolean)));
+	  /* Host */
 
-	    if (isInvoking) {
-	      if (timerId === undefined) {
-	        return leadingEdge(lastCallTime);
-	      }
-	      if (maxing) {
-	        // Handle invocations in a tight loop.
-	        clearTimeout(timerId);
-	        timerId = setTimeout(timerExpired, wait);
-	        return invokeFunc(lastCallTime);
-	      }
-	    }
-	    if (timerId === undefined) {
-	      timerId = setTimeout(timerExpired, wait);
-	    }
-	    return result;
+	  var loc = window.top.location;
+	  var origin = loc.origin;
+
+	  if (!origin) {
+	    // for unpatched IE11
+	    origin = loc.protocol + '//' + loc.hostname + (loc.port ? ':' + loc.port : '');
 	  }
-	  debounced.cancel = cancel;
-	  debounced.flush = flush;
-	  return debounced;
+
+	  _detected.host = origin + loc.pathname;
+	  return _detected;
 	}
 
-	/** Error message constants. */
-	var FUNC_ERROR_TEXT$1 = 'Expected a function';
+	// Like selection.property('value', ...), but avoids no-op value sets,
+	// which can result in layout/repaint thrashing in some situations.
+	function utilGetSetValue(selection, value) {
+	  function d3_selection_value(value) {
+	    function valueNull() {
+	      delete this.value;
+	    }
 
-	/**
-	 * Creates a throttled function that only invokes `func` at most once per
-	 * every `wait` milliseconds. The throttled function comes with a `cancel`
-	 * method to cancel delayed `func` invocations and a `flush` method to
-	 * immediately invoke them. Provide `options` to indicate whether `func`
-	 * should be invoked on the leading and/or trailing edge of the `wait`
-	 * timeout. The `func` is invoked with the last arguments provided to the
-	 * throttled function. Subsequent calls to the throttled function return the
-	 * result of the last `func` invocation.
-	 *
-	 * **Note:** If `leading` and `trailing` options are `true`, `func` is
-	 * invoked on the trailing edge of the timeout only if the throttled function
-	 * is invoked more than once during the `wait` timeout.
-	 *
-	 * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
-	 * until to the next tick, similar to `setTimeout` with a timeout of `0`.
-	 *
-	 * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
-	 * for details over the differences between `_.throttle` and `_.debounce`.
-	 *
-	 * @static
-	 * @memberOf _
-	 * @since 0.1.0
-	 * @category Function
-	 * @param {Function} func The function to throttle.
-	 * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
-	 * @param {Object} [options={}] The options object.
-	 * @param {boolean} [options.leading=true]
-	 *  Specify invoking on the leading edge of the timeout.
-	 * @param {boolean} [options.trailing=true]
-	 *  Specify invoking on the trailing edge of the timeout.
-	 * @returns {Function} Returns the new throttled function.
-	 * @example
-	 *
-	 * // Avoid excessively updating the position while scrolling.
-	 * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
-	 *
-	 * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
-	 * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
-	 * jQuery(element).on('click', throttled);
-	 *
-	 * // Cancel the trailing throttled invocation.
-	 * jQuery(window).on('popstate', throttled.cancel);
-	 */
-	function throttle(func, wait, options) {
-	  var leading = true,
-	      trailing = true;
+	    function valueConstant() {
+	      if (this.value !== value) {
+	        this.value = value;
+	      }
+	    }
 
-	  if (typeof func != 'function') {
-	    throw new TypeError(FUNC_ERROR_TEXT$1);
+	    function valueFunction() {
+	      var x = value.apply(this, arguments);
+
+	      if (x === null || x === undefined) {
+	        delete this.value;
+	      } else if (this.value !== x) {
+	        this.value = x;
+	      }
+	    }
+
+	    return value === null || value === undefined ? valueNull : typeof value === 'function' ? valueFunction : valueConstant;
 	  }
-	  if (isObject$1(options)) {
-	    leading = 'leading' in options ? !!options.leading : leading;
-	    trailing = 'trailing' in options ? !!options.trailing : trailing;
+
+	  if (arguments.length === 1) {
+	    return selection.property('value');
 	  }
-	  return debounce(func, wait, {
-	    'leading': leading,
-	    'maxWait': wait,
-	    'trailing': trailing
-	  });
+
+	  return selection.each(d3_selection_value(value));
 	}
 
-	var hashes = createCommonjsModule(function (module, exports) {
-	/**
-	 * jshashes - https://github.com/h2non/jshashes
-	 * Released under the "New BSD" license
-	 *
-	 * Algorithms specification:
-	 *
-	 * MD5 - http://www.ietf.org/rfc/rfc1321.txt
-	 * RIPEMD-160 - http://homes.esat.kuleuven.be/~bosselae/ripemd160.html
-	 * SHA1   - http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
-	 * SHA256 - http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
-	 * SHA512 - http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
-	 * HMAC - http://www.ietf.org/rfc/rfc2104.txt
-	 */
-	(function() {
-	  var Hashes;
+	function utilKeybinding(namespace) {
+	  var _keybindings = {};
 
-	  function utf8Encode(str) {
-	    var x, y, output = '',
-	      i = -1,
-	      l;
-
-	    if (str && str.length) {
-	      l = str.length;
-	      while ((i += 1) < l) {
-	        /* Decode utf-16 surrogate pairs */
-	        x = str.charCodeAt(i);
-	        y = i + 1 < l ? str.charCodeAt(i + 1) : 0;
-	        if (0xD800 <= x && x <= 0xDBFF && 0xDC00 <= y && y <= 0xDFFF) {
-	          x = 0x10000 + ((x & 0x03FF) << 10) + (y & 0x03FF);
-	          i += 1;
-	        }
-	        /* Encode output as utf-8 */
-	        if (x <= 0x7F) {
-	          output += String.fromCharCode(x);
-	        } else if (x <= 0x7FF) {
-	          output += String.fromCharCode(0xC0 | ((x >>> 6) & 0x1F),
-	            0x80 | (x & 0x3F));
-	        } else if (x <= 0xFFFF) {
-	          output += String.fromCharCode(0xE0 | ((x >>> 12) & 0x0F),
-	            0x80 | ((x >>> 6) & 0x3F),
-	            0x80 | (x & 0x3F));
-	        } else if (x <= 0x1FFFFF) {
-	          output += String.fromCharCode(0xF0 | ((x >>> 18) & 0x07),
-	            0x80 | ((x >>> 12) & 0x3F),
-	            0x80 | ((x >>> 6) & 0x3F),
-	            0x80 | (x & 0x3F));
-	        }
+	  function testBindings(d3_event, isCapturing) {
+	    var didMatch = false;
+	    var bindings = Object.keys(_keybindings).map(function (id) {
+	      return _keybindings[id];
+	    });
+	    var i, binding; // Most key shortcuts will accept either lower or uppercase ('h' or 'H'),
+	    // so we don't strictly match on the shift key, but we prioritize
+	    // shifted keybindings first, and fallback to unshifted only if no match.
+	    // (This lets us differentiate between '←'/'⇧←' or '⌘Z'/'⌘⇧Z')
+	    // priority match shifted keybindings first
+
+	    for (i = 0; i < bindings.length; i++) {
+	      binding = bindings[i];
+	      if (!binding.event.modifiers.shiftKey) continue; // no shift
+
+	      if (!!binding.capture !== isCapturing) continue;
+
+	      if (matches(d3_event, binding, true)) {
+	        binding.callback(d3_event);
+	        didMatch = true; // match a max of one binding per event
+
+	        break;
+	      }
+	    }
+
+	    if (didMatch) return; // then unshifted keybindings
+
+	    for (i = 0; i < bindings.length; i++) {
+	      binding = bindings[i];
+	      if (binding.event.modifiers.shiftKey) continue; // shift
+
+	      if (!!binding.capture !== isCapturing) continue;
+
+	      if (matches(d3_event, binding, false)) {
+	        binding.callback(d3_event);
+	        break;
 	      }
 	    }
-	    return output;
-	  }
 
-	  function utf8Decode(str) {
-	    var i, ac, c1, c2, c3, arr = [],
-	      l;
-	    i = ac = c1 = c2 = c3 = 0;
-
-	    if (str && str.length) {
-	      l = str.length;
-	      str += '';
-
-	      while (i < l) {
-	        c1 = str.charCodeAt(i);
-	        ac += 1;
-	        if (c1 < 128) {
-	          arr[ac] = String.fromCharCode(c1);
-	          i += 1;
-	        } else if (c1 > 191 && c1 < 224) {
-	          c2 = str.charCodeAt(i + 1);
-	          arr[ac] = String.fromCharCode(((c1 & 31) << 6) | (c2 & 63));
-	          i += 2;
+	    function matches(d3_event, binding, testShift) {
+	      var event = d3_event;
+	      var isMatch = false;
+	      var tryKeyCode = true; // Prefer a match on `KeyboardEvent.key`
+
+	      if (event.key !== undefined) {
+	        tryKeyCode = event.key.charCodeAt(0) > 255; // outside ISO-Latin-1
+
+	        isMatch = true;
+
+	        if (binding.event.key === undefined) {
+	          isMatch = false;
+	        } else if (Array.isArray(binding.event.key)) {
+	          if (binding.event.key.map(function (s) {
+	            return s.toLowerCase();
+	          }).indexOf(event.key.toLowerCase()) === -1) {
+	            isMatch = false;
+	          }
 	        } else {
-	          c2 = str.charCodeAt(i + 1);
-	          c3 = str.charCodeAt(i + 2);
-	          arr[ac] = String.fromCharCode(((c1 & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
-	          i += 3;
+	          if (event.key.toLowerCase() !== binding.event.key.toLowerCase()) {
+	            isMatch = false;
+	          }
 	        }
+	      } // Fallback match on `KeyboardEvent.keyCode`, can happen if:
+	      // - browser doesn't support `KeyboardEvent.key`
+	      // - `KeyboardEvent.key` is outside ISO-Latin-1 range (cyrillic?)
+
+
+	      if (!isMatch && tryKeyCode) {
+	        isMatch = event.keyCode === binding.event.keyCode;
 	      }
-	    }
-	    return arr.join('');
-	  }
 
-	  /**
-	   * Add integers, wrapping at 2^32. This uses 16-bit operations internally
-	   * to work around bugs in some JS interpreters.
-	   */
+	      if (!isMatch) return false; // test modifier keys
 
-	  function safe_add(x, y) {
-	    var lsw = (x & 0xFFFF) + (y & 0xFFFF),
-	      msw = (x >> 16) + (y >> 16) + (lsw >> 16);
-	    return (msw << 16) | (lsw & 0xFFFF);
-	  }
+	      if (!(event.ctrlKey && event.altKey)) {
+	        // if both are set, assume AltGr and skip it - #4096
+	        if (event.ctrlKey !== binding.event.modifiers.ctrlKey) return false;
+	        if (event.altKey !== binding.event.modifiers.altKey) return false;
+	      }
 
-	  /**
-	   * Bitwise rotate a 32-bit number to the left.
-	   */
+	      if (event.metaKey !== binding.event.modifiers.metaKey) return false;
+	      if (testShift && event.shiftKey !== binding.event.modifiers.shiftKey) return false;
+	      return true;
+	    }
+	  }
 
-	  function bit_rol(num, cnt) {
-	    return (num << cnt) | (num >>> (32 - cnt));
+	  function capture(d3_event) {
+	    testBindings(d3_event, true);
 	  }
 
-	  /**
-	   * Convert a raw string to a hex string
-	   */
+	  function bubble(d3_event) {
+	    var tagName = select(d3_event.target).node().tagName;
 
-	  function rstr2hex(input, hexcase) {
-	    var hex_tab = hexcase ? '0123456789ABCDEF' : '0123456789abcdef',
-	      output = '',
-	      x, i = 0,
-	      l = input.length;
-	    for (; i < l; i += 1) {
-	      x = input.charCodeAt(i);
-	      output += hex_tab.charAt((x >>> 4) & 0x0F) + hex_tab.charAt(x & 0x0F);
+	    if (tagName === 'INPUT' || tagName === 'SELECT' || tagName === 'TEXTAREA') {
+	      return;
 	    }
-	    return output;
+
+	    testBindings(d3_event, false);
 	  }
 
-	  /**
-	   * Convert an array of big-endian words to a string
-	   */
+	  function keybinding(selection) {
+	    selection = selection || select(document);
+	    selection.on('keydown.capture.' + namespace, capture, true);
+	    selection.on('keydown.bubble.' + namespace, bubble, false);
+	    return keybinding;
+	  } // was: keybinding.off()
 
-	  function binb2rstr(input) {
-	    var i, l = input.length * 32,
-	      output = '';
-	    for (i = 0; i < l; i += 8) {
-	      output += String.fromCharCode((input[i >> 5] >>> (24 - i % 32)) & 0xFF);
-	    }
-	    return output;
-	  }
 
-	  /**
-	   * Convert an array of little-endian words to a string
-	   */
+	  keybinding.unbind = function (selection) {
+	    _keybindings = [];
+	    selection = selection || select(document);
+	    selection.on('keydown.capture.' + namespace, null);
+	    selection.on('keydown.bubble.' + namespace, null);
+	    return keybinding;
+	  };
 
-	  function binl2rstr(input) {
-	    var i, l = input.length * 32,
-	      output = '';
-	    for (i = 0; i < l; i += 8) {
-	      output += String.fromCharCode((input[i >> 5] >>> (i % 32)) & 0xFF);
-	    }
-	    return output;
-	  }
+	  keybinding.clear = function () {
+	    _keybindings = {};
+	    return keybinding;
+	  }; // Remove one or more keycode bindings.
 
-	  /**
-	   * Convert a raw string to an array of little-endian words
-	   * Characters >255 have their high-byte silently ignored.
-	   */
 
-	  function rstr2binl(input) {
-	    var i, l = input.length * 8,
-	      output = Array(input.length >> 2),
-	      lo = output.length;
-	    for (i = 0; i < lo; i += 1) {
-	      output[i] = 0;
-	    }
-	    for (i = 0; i < l; i += 8) {
-	      output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << (i % 32);
+	  keybinding.off = function (codes, capture) {
+	    var arr = utilArrayUniq([].concat(codes));
+
+	    for (var i = 0; i < arr.length; i++) {
+	      var id = arr[i] + (capture ? '-capture' : '-bubble');
+	      delete _keybindings[id];
 	    }
-	    return output;
-	  }
 
-	  /**
-	   * Convert a raw string to an array of big-endian words
-	   * Characters >255 have their high-byte silently ignored.
-	   */
+	    return keybinding;
+	  }; // Add one or more keycode bindings.
+
+
+	  keybinding.on = function (codes, callback, capture) {
+	    if (typeof callback !== 'function') {
+	      return keybinding.off(codes, capture);
+	    }
+
+	    var arr = utilArrayUniq([].concat(codes));
+
+	    for (var i = 0; i < arr.length; i++) {
+	      var id = arr[i] + (capture ? '-capture' : '-bubble');
+	      var binding = {
+	        id: id,
+	        capture: capture,
+	        callback: callback,
+	        event: {
+	          key: undefined,
+	          // preferred
+	          keyCode: 0,
+	          // fallback
+	          modifiers: {
+	            shiftKey: false,
+	            ctrlKey: false,
+	            altKey: false,
+	            metaKey: false
+	          }
+	        }
+	      };
 
-	  function rstr2binb(input) {
-	    var i, l = input.length * 8,
-	      output = Array(input.length >> 2),
-	      lo = output.length;
-	    for (i = 0; i < lo; i += 1) {
-	      output[i] = 0;
-	    }
-	    for (i = 0; i < l; i += 8) {
-	      output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << (24 - i % 32);
-	    }
-	    return output;
-	  }
+	      if (_keybindings[id]) {
+	        console.warn('warning: duplicate keybinding for "' + id + '"'); // eslint-disable-line no-console
+	      }
 
-	  /**
-	   * Convert a raw string to an arbitrary string encoding
-	   */
+	      _keybindings[id] = binding;
+	      var matches = arr[i].toLowerCase().match(/(?:(?:[^+⇧⌃⌥⌘])+|[⇧⌃⌥⌘]|\+\+|^\+$)/g);
 
-	  function rstr2any(input, encoding) {
-	    var divisor = encoding.length,
-	      remainders = Array(),
-	      i, q, x, ld, quotient, dividend, output, full_length;
+	      for (var j = 0; j < matches.length; j++) {
+	        // Normalise matching errors
+	        if (matches[j] === '++') matches[j] = '+';
 
-	    /* Convert to an array of 16-bit big-endian values, forming the dividend */
-	    dividend = Array(Math.ceil(input.length / 2));
-	    ld = dividend.length;
-	    for (i = 0; i < ld; i += 1) {
-	      dividend[i] = (input.charCodeAt(i * 2) << 8) | input.charCodeAt(i * 2 + 1);
-	    }
+	        if (matches[j] in utilKeybinding.modifierCodes) {
+	          var prop = utilKeybinding.modifierProperties[utilKeybinding.modifierCodes[matches[j]]];
+	          binding.event.modifiers[prop] = true;
+	        } else {
+	          binding.event.key = utilKeybinding.keys[matches[j]] || matches[j];
 
-	    /**
-	     * Repeatedly perform a long division. The binary array forms the dividend,
-	     * the length of the encoding is the divisor. Once computed, the quotient
-	     * forms the dividend for the next step. We stop when the dividend is zerHashes.
-	     * All remainders are stored for later use.
-	     */
-	    while (dividend.length > 0) {
-	      quotient = Array();
-	      x = 0;
-	      for (i = 0; i < dividend.length; i += 1) {
-	        x = (x << 16) + dividend[i];
-	        q = Math.floor(x / divisor);
-	        x -= q * divisor;
-	        if (quotient.length > 0 || q > 0) {
-	          quotient[quotient.length] = q;
+	          if (matches[j] in utilKeybinding.keyCodes) {
+	            binding.event.keyCode = utilKeybinding.keyCodes[matches[j]];
+	          }
 	        }
 	      }
-	      remainders[remainders.length] = x;
-	      dividend = quotient;
 	    }
 
-	    /* Convert the remainders to the output string */
-	    output = '';
-	    for (i = remainders.length - 1; i >= 0; i--) {
-	      output += encoding.charAt(remainders[i]);
+	    return keybinding;
+	  };
+
+	  return keybinding;
+	}
+	/*
+	 * See https://github.com/keithamus/jwerty
+	 */
+
+	utilKeybinding.modifierCodes = {
+	  // Shift key, ⇧
+	  '⇧': 16,
+	  shift: 16,
+	  // CTRL key, on Mac: ⌃
+	  '⌃': 17,
+	  ctrl: 17,
+	  // ALT key, on Mac: ⌥ (Alt)
+	  '⌥': 18,
+	  alt: 18,
+	  option: 18,
+	  // META, on Mac: ⌘ (CMD), on Windows (Win), on Linux (Super)
+	  '⌘': 91,
+	  meta: 91,
+	  cmd: 91,
+	  'super': 91,
+	  win: 91
+	};
+	utilKeybinding.modifierProperties = {
+	  16: 'shiftKey',
+	  17: 'ctrlKey',
+	  18: 'altKey',
+	  91: 'metaKey'
+	};
+	utilKeybinding.plusKeys = ['plus', 'ffplus', '=', 'ffequals', '≠', '±'];
+	utilKeybinding.minusKeys = ['_', '-', 'ffminus', 'dash', '–', '—'];
+	utilKeybinding.keys = {
+	  // Backspace key, on Mac: ⌫ (Backspace)
+	  '⌫': 'Backspace',
+	  backspace: 'Backspace',
+	  // Tab Key, on Mac: ⇥ (Tab), on Windows ⇥⇥
+	  '⇥': 'Tab',
+	  '⇆': 'Tab',
+	  tab: 'Tab',
+	  // Return key, ↩
+	  '↩': 'Enter',
+	  '↵': 'Enter',
+	  '⏎': 'Enter',
+	  'return': 'Enter',
+	  enter: 'Enter',
+	  '⌅': 'Enter',
+	  // Pause/Break key
+	  'pause': 'Pause',
+	  'pause-break': 'Pause',
+	  // Caps Lock key, ⇪
+	  '⇪': 'CapsLock',
+	  caps: 'CapsLock',
+	  'caps-lock': 'CapsLock',
+	  // Escape key, on Mac: ⎋, on Windows: Esc
+	  '⎋': ['Escape', 'Esc'],
+	  escape: ['Escape', 'Esc'],
+	  esc: ['Escape', 'Esc'],
+	  // Space key
+	  space: [' ', 'Spacebar'],
+	  // Page-Up key, or pgup, on Mac: ↖
+	  '↖': 'PageUp',
+	  pgup: 'PageUp',
+	  'page-up': 'PageUp',
+	  // Page-Down key, or pgdown, on Mac: ↘
+	  '↘': 'PageDown',
+	  pgdown: 'PageDown',
+	  'page-down': 'PageDown',
+	  // END key, on Mac: ⇟
+	  '⇟': 'End',
+	  end: 'End',
+	  // HOME key, on Mac: ⇞
+	  '⇞': 'Home',
+	  home: 'Home',
+	  // Insert key, or ins
+	  ins: 'Insert',
+	  insert: 'Insert',
+	  // Delete key, on Mac: ⌦ (Delete)
+	  '⌦': ['Delete', 'Del'],
+	  del: ['Delete', 'Del'],
+	  'delete': ['Delete', 'Del'],
+	  // Left Arrow Key, or ←
+	  '←': ['ArrowLeft', 'Left'],
+	  left: ['ArrowLeft', 'Left'],
+	  'arrow-left': ['ArrowLeft', 'Left'],
+	  // Up Arrow Key, or ↑
+	  '↑': ['ArrowUp', 'Up'],
+	  up: ['ArrowUp', 'Up'],
+	  'arrow-up': ['ArrowUp', 'Up'],
+	  // Right Arrow Key, or →
+	  '→': ['ArrowRight', 'Right'],
+	  right: ['ArrowRight', 'Right'],
+	  'arrow-right': ['ArrowRight', 'Right'],
+	  // Up Arrow Key, or ↓
+	  '↓': ['ArrowDown', 'Down'],
+	  down: ['ArrowDown', 'Down'],
+	  'arrow-down': ['ArrowDown', 'Down'],
+	  // odities, stuff for backward compatibility (browsers and code):
+	  // Num-Multiply, or *
+	  '*': ['*', 'Multiply'],
+	  star: ['*', 'Multiply'],
+	  asterisk: ['*', 'Multiply'],
+	  multiply: ['*', 'Multiply'],
+	  // Num-Plus or +
+	  '+': ['+', 'Add'],
+	  'plus': ['+', 'Add'],
+	  // Num-Subtract, or -
+	  '-': ['-', 'Subtract'],
+	  subtract: ['-', 'Subtract'],
+	  'dash': ['-', 'Subtract'],
+	  // Semicolon
+	  semicolon: ';',
+	  // = or equals
+	  equals: '=',
+	  // Comma, or ,
+	  comma: ',',
+	  // Period, or ., or full-stop
+	  period: '.',
+	  'full-stop': '.',
+	  // Slash, or /, or forward-slash
+	  slash: '/',
+	  'forward-slash': '/',
+	  // Tick, or `, or back-quote
+	  tick: '`',
+	  'back-quote': '`',
+	  // Open bracket, or [
+	  'open-bracket': '[',
+	  // Back slash, or \
+	  'back-slash': '\\',
+	  // Close backet, or ]
+	  'close-bracket': ']',
+	  // Apostrophe, or Quote, or '
+	  quote: '\'',
+	  apostrophe: '\'',
+	  // NUMPAD 0-9
+	  'num-0': '0',
+	  'num-1': '1',
+	  'num-2': '2',
+	  'num-3': '3',
+	  'num-4': '4',
+	  'num-5': '5',
+	  'num-6': '6',
+	  'num-7': '7',
+	  'num-8': '8',
+	  'num-9': '9',
+	  // F1-F25
+	  f1: 'F1',
+	  f2: 'F2',
+	  f3: 'F3',
+	  f4: 'F4',
+	  f5: 'F5',
+	  f6: 'F6',
+	  f7: 'F7',
+	  f8: 'F8',
+	  f9: 'F9',
+	  f10: 'F10',
+	  f11: 'F11',
+	  f12: 'F12',
+	  f13: 'F13',
+	  f14: 'F14',
+	  f15: 'F15',
+	  f16: 'F16',
+	  f17: 'F17',
+	  f18: 'F18',
+	  f19: 'F19',
+	  f20: 'F20',
+	  f21: 'F21',
+	  f22: 'F22',
+	  f23: 'F23',
+	  f24: 'F24',
+	  f25: 'F25'
+	};
+	utilKeybinding.keyCodes = {
+	  // Backspace key, on Mac: ⌫ (Backspace)
+	  '⌫': 8,
+	  backspace: 8,
+	  // Tab Key, on Mac: ⇥ (Tab), on Windows ⇥⇥
+	  '⇥': 9,
+	  '⇆': 9,
+	  tab: 9,
+	  // Return key, ↩
+	  '↩': 13,
+	  '↵': 13,
+	  '⏎': 13,
+	  'return': 13,
+	  enter: 13,
+	  '⌅': 13,
+	  // Pause/Break key
+	  'pause': 19,
+	  'pause-break': 19,
+	  // Caps Lock key, ⇪
+	  '⇪': 20,
+	  caps: 20,
+	  'caps-lock': 20,
+	  // Escape key, on Mac: ⎋, on Windows: Esc
+	  '⎋': 27,
+	  escape: 27,
+	  esc: 27,
+	  // Space key
+	  space: 32,
+	  // Page-Up key, or pgup, on Mac: ↖
+	  '↖': 33,
+	  pgup: 33,
+	  'page-up': 33,
+	  // Page-Down key, or pgdown, on Mac: ↘
+	  '↘': 34,
+	  pgdown: 34,
+	  'page-down': 34,
+	  // END key, on Mac: ⇟
+	  '⇟': 35,
+	  end: 35,
+	  // HOME key, on Mac: ⇞
+	  '⇞': 36,
+	  home: 36,
+	  // Insert key, or ins
+	  ins: 45,
+	  insert: 45,
+	  // Delete key, on Mac: ⌦ (Delete)
+	  '⌦': 46,
+	  del: 46,
+	  'delete': 46,
+	  // Left Arrow Key, or ←
+	  '←': 37,
+	  left: 37,
+	  'arrow-left': 37,
+	  // Up Arrow Key, or ↑
+	  '↑': 38,
+	  up: 38,
+	  'arrow-up': 38,
+	  // Right Arrow Key, or →
+	  '→': 39,
+	  right: 39,
+	  'arrow-right': 39,
+	  // Up Arrow Key, or ↓
+	  '↓': 40,
+	  down: 40,
+	  'arrow-down': 40,
+	  // odities, printing characters that come out wrong:
+	  // Firefox Equals
+	  'ffequals': 61,
+	  // Num-Multiply, or *
+	  '*': 106,
+	  star: 106,
+	  asterisk: 106,
+	  multiply: 106,
+	  // Num-Plus or +
+	  '+': 107,
+	  'plus': 107,
+	  // Num-Subtract, or -
+	  '-': 109,
+	  subtract: 109,
+	  // Vertical Bar / Pipe
+	  '|': 124,
+	  // Firefox Plus
+	  'ffplus': 171,
+	  // Firefox Minus
+	  'ffminus': 173,
+	  // Semicolon
+	  ';': 186,
+	  semicolon: 186,
+	  // = or equals
+	  '=': 187,
+	  'equals': 187,
+	  // Comma, or ,
+	  ',': 188,
+	  comma: 188,
+	  // Dash / Underscore key
+	  'dash': 189,
+	  // Period, or ., or full-stop
+	  '.': 190,
+	  period: 190,
+	  'full-stop': 190,
+	  // Slash, or /, or forward-slash
+	  '/': 191,
+	  slash: 191,
+	  'forward-slash': 191,
+	  // Tick, or `, or back-quote
+	  '`': 192,
+	  tick: 192,
+	  'back-quote': 192,
+	  // Open bracket, or [
+	  '[': 219,
+	  'open-bracket': 219,
+	  // Back slash, or \
+	  '\\': 220,
+	  'back-slash': 220,
+	  // Close backet, or ]
+	  ']': 221,
+	  'close-bracket': 221,
+	  // Apostrophe, or Quote, or '
+	  '\'': 222,
+	  quote: 222,
+	  apostrophe: 222
+	}; // NUMPAD 0-9
+
+	var i = 95,
+	    n = 0;
+
+	while (++i < 106) {
+	  utilKeybinding.keyCodes['num-' + n] = i;
+	  ++n;
+	} // 0-9
+
+
+	i = 47;
+	n = 0;
+
+	while (++i < 58) {
+	  utilKeybinding.keyCodes[n] = i;
+	  ++n;
+	} // F1-F25
+
+
+	i = 111;
+	n = 1;
+
+	while (++i < 136) {
+	  utilKeybinding.keyCodes['f' + n] = i;
+	  ++n;
+	} // a-z
+
+
+	i = 64;
+
+	while (++i < 91) {
+	  utilKeybinding.keyCodes[String.fromCharCode(i).toLowerCase()] = i;
+	}
+
+	function utilObjectOmit(obj, omitKeys) {
+	  return Object.keys(obj).reduce(function (result, key) {
+	    if (omitKeys.indexOf(key) === -1) {
+	      result[key] = obj[key]; // keep
 	    }
 
-	    /* Append leading zero equivalents */
-	    full_length = Math.ceil(input.length * 8 / (Math.log(encoding.length) / Math.log(2)));
-	    for (i = output.length; i < full_length; i += 1) {
-	      output = encoding[0] + output;
+	    return result;
+	  }, {});
+	}
+
+	// Copies a variable number of methods from source to target.
+	function utilRebind(target, source) {
+	  var i = 1,
+	      n = arguments.length,
+	      method;
+
+	  while (++i < n) {
+	    target[method = arguments[i]] = d3_rebind(target, source, source[method]);
+	  }
+
+	  return target;
+	} // Method is assumed to be a standard D3 getter-setter:
+	// If passed with no arguments, gets the value.
+	// If passed with arguments, sets the value and returns the target.
+
+	function d3_rebind(target, source, method) {
+	  return function () {
+	    var value = method.apply(source, arguments);
+	    return value === source ? target : value;
+	  };
+	}
+
+	// A per-domain session mutex backed by a cookie and dead man's
+	// switch. If the session crashes, the mutex will auto-release
+	// after 5 seconds.
+	// This accepts a string and returns an object that complies with utilSessionMutexType
+	function utilSessionMutex(name) {
+	  var mutex = {};
+	  var intervalID;
+
+	  function renew() {
+	    var expires = new Date();
+	    expires.setSeconds(expires.getSeconds() + 5);
+	    document.cookie = name + '=1; expires=' + expires.toUTCString() + '; sameSite=strict';
+	  }
+
+	  mutex.lock = function () {
+	    if (intervalID) return true;
+	    var cookie = document.cookie.replace(new RegExp('(?:(?:^|.*;)\\s*' + name + '\\s*\\=\\s*([^;]*).*$)|^.*$'), '$1');
+	    if (cookie) return false;
+	    renew();
+	    intervalID = window.setInterval(renew, 4000);
+	    return true;
+	  };
+
+	  mutex.unlock = function () {
+	    if (!intervalID) return;
+	    document.cookie = name + '=; expires=Thu, 01 Jan 1970 00:00:00 GMT; sameSite=strict';
+	    clearInterval(intervalID);
+	    intervalID = null;
+	  };
+
+	  mutex.locked = function () {
+	    return !!intervalID;
+	  };
+
+	  return mutex;
+	}
+
+	function utilTiler() {
+	  var _size = [256, 256];
+	  var _scale = 256;
+	  var _tileSize = 256;
+	  var _zoomExtent = [0, 20];
+	  var _translate = [_size[0] / 2, _size[1] / 2];
+	  var _margin = 0;
+	  var _skipNullIsland = false;
+
+	  function clamp(num, min, max) {
+	    return Math.max(min, Math.min(num, max));
+	  }
+
+	  function nearNullIsland(tile) {
+	    var x = tile[0];
+	    var y = tile[1];
+	    var z = tile[2];
+
+	    if (z >= 7) {
+	      var center = Math.pow(2, z - 1);
+	      var width = Math.pow(2, z - 6);
+	      var min = center - width / 2;
+	      var max = center + width / 2 - 1;
+	      return x >= min && x <= max && y >= min && y <= max;
 	    }
-	    return output;
+
+	    return false;
 	  }
 
-	  /**
-	   * Convert a raw string to a base-64 string
-	   */
+	  function tiler() {
+	    var z = geoScaleToZoom(_scale / (2 * Math.PI), _tileSize);
+	    var z0 = clamp(Math.round(z), _zoomExtent[0], _zoomExtent[1]);
+	    var tileMin = 0;
+	    var tileMax = Math.pow(2, z0) - 1;
+	    var log2ts = Math.log(_tileSize) * Math.LOG2E;
+	    var k = Math.pow(2, z - z0 + log2ts);
+	    var origin = [(_translate[0] - _scale / 2) / k, (_translate[1] - _scale / 2) / k];
+	    var cols = range$1(clamp(Math.floor(-origin[0]) - _margin, tileMin, tileMax + 1), clamp(Math.ceil(_size[0] / k - origin[0]) + _margin, tileMin, tileMax + 1));
+	    var rows = range$1(clamp(Math.floor(-origin[1]) - _margin, tileMin, tileMax + 1), clamp(Math.ceil(_size[1] / k - origin[1]) + _margin, tileMin, tileMax + 1));
+	    var tiles = [];
 
-	  function rstr2b64(input, b64pad) {
-	    var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
-	      output = '',
-	      len = input.length,
-	      i, j, triplet;
-	    b64pad = b64pad || '=';
-	    for (i = 0; i < len; i += 3) {
-	      triplet = (input.charCodeAt(i) << 16) | (i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0) | (i + 2 < len ? input.charCodeAt(i + 2) : 0);
-	      for (j = 0; j < 4; j += 1) {
-	        if (i * 8 + j * 6 > input.length * 8) {
-	          output += b64pad;
+	    for (var i = 0; i < rows.length; i++) {
+	      var y = rows[i];
+
+	      for (var j = 0; j < cols.length; j++) {
+	        var x = cols[j];
+
+	        if (i >= _margin && i <= rows.length - _margin && j >= _margin && j <= cols.length - _margin) {
+	          tiles.unshift([x, y, z0]); // tiles in view at beginning
 	        } else {
-	          output += tab.charAt((triplet >>> 6 * (3 - j)) & 0x3F);
+	          tiles.push([x, y, z0]); // tiles in margin at the end
 	        }
 	      }
 	    }
-	    return output;
-	  }
 
-	  Hashes = {
-	    /**
-	     * @property {String} version
-	     * @readonly
-	     */
-	    VERSION: '1.0.6',
-	    /**
-	     * @member Hashes
-	     * @class Base64
-	     * @constructor
-	     */
-	    Base64: function() {
-	      // private properties
-	      var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
-	        pad = '=', // default pad according with the RFC standard
-	        utf8 = true; // by default enable UTF-8 support encoding
+	    tiles.translate = origin;
+	    tiles.scale = k;
+	    return tiles;
+	  }
+	  /**
+	   * getTiles() returns an array of tiles that cover the map view
+	   */
 
-	      // public method for encoding
-	      this.encode = function(input) {
-	        var i, j, triplet,
-	          output = '',
-	          len = input.length;
 
-	        pad = pad || '=';
-	        input = (utf8) ? utf8Encode(input) : input;
+	  tiler.getTiles = function (projection) {
+	    var origin = [projection.scale() * Math.PI - projection.translate()[0], projection.scale() * Math.PI - projection.translate()[1]];
+	    this.size(projection.clipExtent()[1]).scale(projection.scale() * 2 * Math.PI).translate(projection.translate());
+	    var tiles = tiler();
+	    var ts = tiles.scale;
+	    return tiles.map(function (tile) {
+	      if (_skipNullIsland && nearNullIsland(tile)) {
+	        return false;
+	      }
 
-	        for (i = 0; i < len; i += 3) {
-	          triplet = (input.charCodeAt(i) << 16) | (i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0) | (i + 2 < len ? input.charCodeAt(i + 2) : 0);
-	          for (j = 0; j < 4; j += 1) {
-	            if (i * 8 + j * 6 > len * 8) {
-	              output += pad;
-	            } else {
-	              output += tab.charAt((triplet >>> 6 * (3 - j)) & 0x3F);
-	            }
-	          }
-	        }
-	        return output;
+	      var x = tile[0] * ts - origin[0];
+	      var y = tile[1] * ts - origin[1];
+	      return {
+	        id: tile.toString(),
+	        xyz: tile,
+	        extent: geoExtent(projection.invert([x, y + ts]), projection.invert([x + ts, y]))
 	      };
+	    }).filter(Boolean);
+	  };
+	  /**
+	   * getGeoJSON() returns a FeatureCollection for debugging tiles
+	   */
 
-	      // public method for decoding
-	      this.decode = function(input) {
-	        // var b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
-	        var i, o1, o2, o3, h1, h2, h3, h4, bits, ac,
-	          dec = '',
-	          arr = [];
-	        if (!input) {
-	          return input;
+
+	  tiler.getGeoJSON = function (projection) {
+	    var features = tiler.getTiles(projection).map(function (tile) {
+	      return {
+	        type: 'Feature',
+	        properties: {
+	          id: tile.id,
+	          name: tile.id
+	        },
+	        geometry: {
+	          type: 'Polygon',
+	          coordinates: [tile.extent.polygon()]
 	        }
+	      };
+	    });
+	    return {
+	      type: 'FeatureCollection',
+	      features: features
+	    };
+	  };
 
-	        i = ac = 0;
-	        input = input.replace(new RegExp('\\' + pad, 'gi'), ''); // use '='
-	        //input += '';
+	  tiler.tileSize = function (val) {
+	    if (!arguments.length) return _tileSize;
+	    _tileSize = val;
+	    return tiler;
+	  };
 
-	        do { // unpack four hexets into three octets using index points in b64
-	          h1 = tab.indexOf(input.charAt(i += 1));
-	          h2 = tab.indexOf(input.charAt(i += 1));
-	          h3 = tab.indexOf(input.charAt(i += 1));
-	          h4 = tab.indexOf(input.charAt(i += 1));
+	  tiler.zoomExtent = function (val) {
+	    if (!arguments.length) return _zoomExtent;
+	    _zoomExtent = val;
+	    return tiler;
+	  };
 
-	          bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;
+	  tiler.size = function (val) {
+	    if (!arguments.length) return _size;
+	    _size = val;
+	    return tiler;
+	  };
 
-	          o1 = bits >> 16 & 0xff;
-	          o2 = bits >> 8 & 0xff;
-	          o3 = bits & 0xff;
-	          ac += 1;
+	  tiler.scale = function (val) {
+	    if (!arguments.length) return _scale;
+	    _scale = val;
+	    return tiler;
+	  };
 
-	          if (h3 === 64) {
-	            arr[ac] = String.fromCharCode(o1);
-	          } else if (h4 === 64) {
-	            arr[ac] = String.fromCharCode(o1, o2);
-	          } else {
-	            arr[ac] = String.fromCharCode(o1, o2, o3);
-	          }
-	        } while (i < input.length);
+	  tiler.translate = function (val) {
+	    if (!arguments.length) return _translate;
+	    _translate = val;
+	    return tiler;
+	  }; // number to extend the rows/columns beyond those covering the viewport
 
-	        dec = arr.join('');
-	        dec = (utf8) ? utf8Decode(dec) : dec;
 
-	        return dec;
-	      };
+	  tiler.margin = function (val) {
+	    if (!arguments.length) return _margin;
+	    _margin = +val;
+	    return tiler;
+	  };
 
-	      // set custom pad string
-	      this.setPad = function(str) {
-	        pad = str || pad;
-	        return this;
-	      };
-	      // set custom tab string characters
-	      this.setTab = function(str) {
-	        tab = str || tab;
-	        return this;
-	      };
-	      this.setUTF8 = function(bool) {
-	        if (typeof bool === 'boolean') {
-	          utf8 = bool;
-	        }
-	        return this;
-	      };
-	    },
+	  tiler.skipNullIsland = function (val) {
+	    if (!arguments.length) return _skipNullIsland;
+	    _skipNullIsland = val;
+	    return tiler;
+	  };
 
-	    /**
-	     * CRC-32 calculation
-	     * @member Hashes
-	     * @method CRC32
-	     * @static
-	     * @param {String} str Input String
-	     * @return {String}
-	     */
-	    CRC32: function(str) {
-	      var crc = 0,
-	        x = 0,
-	        y = 0,
-	        table, i, iTop;
-	      str = utf8Encode(str);
-
-	      table = [
-	        '00000000 77073096 EE0E612C 990951BA 076DC419 706AF48F E963A535 9E6495A3 0EDB8832 ',
-	        '79DCB8A4 E0D5E91E 97D2D988 09B64C2B 7EB17CBD E7B82D07 90BF1D91 1DB71064 6AB020F2 F3B97148 ',
-	        '84BE41DE 1ADAD47D 6DDDE4EB F4D4B551 83D385C7 136C9856 646BA8C0 FD62F97A 8A65C9EC 14015C4F ',
-	        '63066CD9 FA0F3D63 8D080DF5 3B6E20C8 4C69105E D56041E4 A2677172 3C03E4D1 4B04D447 D20D85FD ',
-	        'A50AB56B 35B5A8FA 42B2986C DBBBC9D6 ACBCF940 32D86CE3 45DF5C75 DCD60DCF ABD13D59 26D930AC ',
-	        '51DE003A C8D75180 BFD06116 21B4F4B5 56B3C423 CFBA9599 B8BDA50F 2802B89E 5F058808 C60CD9B2 ',
-	        'B10BE924 2F6F7C87 58684C11 C1611DAB B6662D3D 76DC4190 01DB7106 98D220BC EFD5102A 71B18589 ',
-	        '06B6B51F 9FBFE4A5 E8B8D433 7807C9A2 0F00F934 9609A88E E10E9818 7F6A0DBB 086D3D2D 91646C97 ',
-	        'E6635C01 6B6B51F4 1C6C6162 856530D8 F262004E 6C0695ED 1B01A57B 8208F4C1 F50FC457 65B0D9C6 ',
-	        '12B7E950 8BBEB8EA FCB9887C 62DD1DDF 15DA2D49 8CD37CF3 FBD44C65 4DB26158 3AB551CE A3BC0074 ',
-	        'D4BB30E2 4ADFA541 3DD895D7 A4D1C46D D3D6F4FB 4369E96A 346ED9FC AD678846 DA60B8D0 44042D73 ',
-	        '33031DE5 AA0A4C5F DD0D7CC9 5005713C 270241AA BE0B1010 C90C2086 5768B525 206F85B3 B966D409 ',
-	        'CE61E49F 5EDEF90E 29D9C998 B0D09822 C7D7A8B4 59B33D17 2EB40D81 B7BD5C3B C0BA6CAD EDB88320 ',
-	        '9ABFB3B6 03B6E20C 74B1D29A EAD54739 9DD277AF 04DB2615 73DC1683 E3630B12 94643B84 0D6D6A3E ',
-	        '7A6A5AA8 E40ECF0B 9309FF9D 0A00AE27 7D079EB1 F00F9344 8708A3D2 1E01F268 6906C2FE F762575D ',
-	        '806567CB 196C3671 6E6B06E7 FED41B76 89D32BE0 10DA7A5A 67DD4ACC F9B9DF6F 8EBEEFF9 17B7BE43 ',
-	        '60B08ED5 D6D6A3E8 A1D1937E 38D8C2C4 4FDFF252 D1BB67F1 A6BC5767 3FB506DD 48B2364B D80D2BDA ',
-	        'AF0A1B4C 36034AF6 41047A60 DF60EFC3 A867DF55 316E8EEF 4669BE79 CB61B38C BC66831A 256FD2A0 ',
-	        '5268E236 CC0C7795 BB0B4703 220216B9 5505262F C5BA3BBE B2BD0B28 2BB45A92 5CB36A04 C2D7FFA7 ',
-	        'B5D0CF31 2CD99E8B 5BDEAE1D 9B64C2B0 EC63F226 756AA39C 026D930A 9C0906A9 EB0E363F 72076785 ',
-	        '05005713 95BF4A82 E2B87A14 7BB12BAE 0CB61B38 92D28E9B E5D5BE0D 7CDCEFB7 0BDBDF21 86D3D2D4 ',
-	        'F1D4E242 68DDB3F8 1FDA836E 81BE16CD F6B9265B 6FB077E1 18B74777 88085AE6 FF0F6A70 66063BCA ',
-	        '11010B5C 8F659EFF F862AE69 616BFFD3 166CCF45 A00AE278 D70DD2EE 4E048354 3903B3C2 A7672661 ',
-	        'D06016F7 4969474D 3E6E77DB AED16A4A D9D65ADC 40DF0B66 37D83BF0 A9BCAE53 DEBB9EC5 47B2CF7F ',
-	        '30B5FFE9 BDBDF21C CABAC28A 53B39330 24B4A3A6 BAD03605 CDD70693 54DE5729 23D967BF B3667A2E ',
-	        'C4614AB8 5D681B02 2A6F2B94 B40BBE37 C30C8EA1 5A05DF1B 2D02EF8D'
-	      ].join('');
-
-	      crc = crc ^ (-1);
-	      for (i = 0, iTop = str.length; i < iTop; i += 1) {
-	        y = (crc ^ str.charCodeAt(i)) & 0xFF;
-	        x = '0x' + table.substr(y * 9, 8);
-	        crc = (crc >>> 8) ^ x;
-	      }
-	      // always return a positive number (that's what >>> 0 does)
-	      return (crc ^ (-1)) >>> 0;
-	    },
-	    /**
-	     * @member Hashes
-	     * @class MD5
-	     * @constructor
-	     * @param {Object} [config]
-	     *
-	     * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
-	     * Digest Algorithm, as defined in RFC 1321.
-	     * Version 2.2 Copyright (C) Paul Johnston 1999 - 2009
-	     * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
-	     * See <http://pajhome.org.uk/crypt/md5> for more infHashes.
-	     */
-	    MD5: function(options) {
-	      /**
-	       * Private config properties. You may need to tweak these to be compatible with
-	       * the server-side, but the defaults work in most cases.
-	       * See {@link Hashes.MD5#method-setUpperCase} and {@link Hashes.SHA1#method-setUpperCase}
-	       */
-	      var hexcase = (options && typeof options.uppercase === 'boolean') ? options.uppercase : false, // hexadecimal output case format. false - lowercase; true - uppercase
-	        b64pad = (options && typeof options.pad === 'string') ? options.pad : '=', // base-64 pad character. Defaults to '=' for strict RFC compliance
-	        utf8 = (options && typeof options.utf8 === 'boolean') ? options.utf8 : true; // enable/disable utf8 encoding
+	  return tiler;
+	}
 
-	      // privileged (public) methods
-	      this.hex = function(s) {
-	        return rstr2hex(rstr(s), hexcase);
-	      };
-	      this.b64 = function(s) {
-	        return rstr2b64(rstr(s), b64pad);
-	      };
-	      this.any = function(s, e) {
-	        return rstr2any(rstr(s), e);
-	      };
-	      this.raw = function(s) {
-	        return rstr(s);
-	      };
-	      this.hex_hmac = function(k, d) {
-	        return rstr2hex(rstr_hmac(k, d), hexcase);
-	      };
-	      this.b64_hmac = function(k, d) {
-	        return rstr2b64(rstr_hmac(k, d), b64pad);
-	      };
-	      this.any_hmac = function(k, d, e) {
-	        return rstr2any(rstr_hmac(k, d), e);
-	      };
-	      /**
-	       * Perform a simple self-test to see if the VM is working
-	       * @return {String} Hexadecimal hash sample
-	       */
-	      this.vm_test = function() {
-	        return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-	      };
-	      /**
-	       * Enable/disable uppercase hexadecimal returned string
-	       * @param {Boolean}
-	       * @return {Object} this
-	       */
-	      this.setUpperCase = function(a) {
-	        if (typeof a === 'boolean') {
-	          hexcase = a;
-	        }
-	        return this;
-	      };
-	      /**
-	       * Defines a base64 pad string
-	       * @param {String} Pad
-	       * @return {Object} this
-	       */
-	      this.setPad = function(a) {
-	        b64pad = a || b64pad;
-	        return this;
-	      };
-	      /**
-	       * Defines a base64 pad string
-	       * @param {Boolean}
-	       * @return {Object} [this]
-	       */
-	      this.setUTF8 = function(a) {
-	        if (typeof a === 'boolean') {
-	          utf8 = a;
-	        }
-	        return this;
-	      };
+	function utilTriggerEvent(target, type) {
+	  target.each(function () {
+	    var evt = document.createEvent('HTMLEvents');
+	    evt.initEvent(type, true, true);
+	    this.dispatchEvent(evt);
+	  });
+	}
 
-	      // private methods
+	var _mainLocations = coreLocations(); // singleton
+	// `coreLocations` maintains an internal index of all the boundaries/geofences used by iD.
+	// It's used by presets, community index, background imagery, to know where in the world these things are valid.
+	// These geofences should be defined by `locationSet` objects:
+	//
+	// let locationSet = {
+	//   include: [ Array of locations ],
+	//   exclude: [ Array of locations ]
+	// };
+	//
+	// For more info see the location-conflation and country-coder projects, see:
+	// https://github.com/ideditor/location-conflation
+	// https://github.com/ideditor/country-coder
+	//
 
-	      /**
-	       * Calculate the MD5 of a raw string
-	       */
+	function coreLocations() {
+	  var _this = {};
+	  var _resolvedFeatures = {}; // cache of *resolved* locationSet features
 
-	      function rstr(s) {
-	        s = (utf8) ? utf8Encode(s) : s;
-	        return binl2rstr(binl(rstr2binl(s), s.length * 8));
-	      }
+	  var _loco = new _default(); // instance of a location-conflation resolver
 
-	      /**
-	       * Calculate the HMAC-MD5, of a key and some data (raw strings)
-	       */
 
-	      function rstr_hmac(key, data) {
-	        var bkey, ipad, opad, hash, i;
+	  var _wp; // instance of a which-polygon index
+	  // pre-resolve the worldwide locationSet
 
-	        key = (utf8) ? utf8Encode(key) : key;
-	        data = (utf8) ? utf8Encode(data) : data;
-	        bkey = rstr2binl(key);
-	        if (bkey.length > 16) {
-	          bkey = binl(bkey, key.length * 8);
-	        }
 
-	        ipad = Array(16), opad = Array(16);
-	        for (i = 0; i < 16; i += 1) {
-	          ipad[i] = bkey[i] ^ 0x36363636;
-	          opad[i] = bkey[i] ^ 0x5C5C5C5C;
-	        }
-	        hash = binl(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
-	        return binl2rstr(binl(opad.concat(hash), 512 + 128));
-	      }
+	  var world = {
+	    locationSet: {
+	      include: ['Q2']
+	    }
+	  };
+	  resolveLocationSet(world);
+	  rebuildIndex();
+	  var _queue = [];
 
-	      /**
-	       * Calculate the MD5 of an array of little-endian words, and a bit length.
-	       */
+	  var _deferred = new Set();
 
-	      function binl(x, len) {
-	        var i, olda, oldb, oldc, oldd,
-	          a = 1732584193,
-	          b = -271733879,
-	          c = -1732584194,
-	          d = 271733878;
-
-	        /* append padding */
-	        x[len >> 5] |= 0x80 << ((len) % 32);
-	        x[(((len + 64) >>> 9) << 4) + 14] = len;
-
-	        for (i = 0; i < x.length; i += 16) {
-	          olda = a;
-	          oldb = b;
-	          oldc = c;
-	          oldd = d;
-
-	          a = md5_ff(a, b, c, d, x[i + 0], 7, -680876936);
-	          d = md5_ff(d, a, b, c, x[i + 1], 12, -389564586);
-	          c = md5_ff(c, d, a, b, x[i + 2], 17, 606105819);
-	          b = md5_ff(b, c, d, a, x[i + 3], 22, -1044525330);
-	          a = md5_ff(a, b, c, d, x[i + 4], 7, -176418897);
-	          d = md5_ff(d, a, b, c, x[i + 5], 12, 1200080426);
-	          c = md5_ff(c, d, a, b, x[i + 6], 17, -1473231341);
-	          b = md5_ff(b, c, d, a, x[i + 7], 22, -45705983);
-	          a = md5_ff(a, b, c, d, x[i + 8], 7, 1770035416);
-	          d = md5_ff(d, a, b, c, x[i + 9], 12, -1958414417);
-	          c = md5_ff(c, d, a, b, x[i + 10], 17, -42063);
-	          b = md5_ff(b, c, d, a, x[i + 11], 22, -1990404162);
-	          a = md5_ff(a, b, c, d, x[i + 12], 7, 1804603682);
-	          d = md5_ff(d, a, b, c, x[i + 13], 12, -40341101);
-	          c = md5_ff(c, d, a, b, x[i + 14], 17, -1502002290);
-	          b = md5_ff(b, c, d, a, x[i + 15], 22, 1236535329);
-
-	          a = md5_gg(a, b, c, d, x[i + 1], 5, -165796510);
-	          d = md5_gg(d, a, b, c, x[i + 6], 9, -1069501632);
-	          c = md5_gg(c, d, a, b, x[i + 11], 14, 643717713);
-	          b = md5_gg(b, c, d, a, x[i + 0], 20, -373897302);
-	          a = md5_gg(a, b, c, d, x[i + 5], 5, -701558691);
-	          d = md5_gg(d, a, b, c, x[i + 10], 9, 38016083);
-	          c = md5_gg(c, d, a, b, x[i + 15], 14, -660478335);
-	          b = md5_gg(b, c, d, a, x[i + 4], 20, -405537848);
-	          a = md5_gg(a, b, c, d, x[i + 9], 5, 568446438);
-	          d = md5_gg(d, a, b, c, x[i + 14], 9, -1019803690);
-	          c = md5_gg(c, d, a, b, x[i + 3], 14, -187363961);
-	          b = md5_gg(b, c, d, a, x[i + 8], 20, 1163531501);
-	          a = md5_gg(a, b, c, d, x[i + 13], 5, -1444681467);
-	          d = md5_gg(d, a, b, c, x[i + 2], 9, -51403784);
-	          c = md5_gg(c, d, a, b, x[i + 7], 14, 1735328473);
-	          b = md5_gg(b, c, d, a, x[i + 12], 20, -1926607734);
-
-	          a = md5_hh(a, b, c, d, x[i + 5], 4, -378558);
-	          d = md5_hh(d, a, b, c, x[i + 8], 11, -2022574463);
-	          c = md5_hh(c, d, a, b, x[i + 11], 16, 1839030562);
-	          b = md5_hh(b, c, d, a, x[i + 14], 23, -35309556);
-	          a = md5_hh(a, b, c, d, x[i + 1], 4, -1530992060);
-	          d = md5_hh(d, a, b, c, x[i + 4], 11, 1272893353);
-	          c = md5_hh(c, d, a, b, x[i + 7], 16, -155497632);
-	          b = md5_hh(b, c, d, a, x[i + 10], 23, -1094730640);
-	          a = md5_hh(a, b, c, d, x[i + 13], 4, 681279174);
-	          d = md5_hh(d, a, b, c, x[i + 0], 11, -358537222);
-	          c = md5_hh(c, d, a, b, x[i + 3], 16, -722521979);
-	          b = md5_hh(b, c, d, a, x[i + 6], 23, 76029189);
-	          a = md5_hh(a, b, c, d, x[i + 9], 4, -640364487);
-	          d = md5_hh(d, a, b, c, x[i + 12], 11, -421815835);
-	          c = md5_hh(c, d, a, b, x[i + 15], 16, 530742520);
-	          b = md5_hh(b, c, d, a, x[i + 2], 23, -995338651);
-
-	          a = md5_ii(a, b, c, d, x[i + 0], 6, -198630844);
-	          d = md5_ii(d, a, b, c, x[i + 7], 10, 1126891415);
-	          c = md5_ii(c, d, a, b, x[i + 14], 15, -1416354905);
-	          b = md5_ii(b, c, d, a, x[i + 5], 21, -57434055);
-	          a = md5_ii(a, b, c, d, x[i + 12], 6, 1700485571);
-	          d = md5_ii(d, a, b, c, x[i + 3], 10, -1894986606);
-	          c = md5_ii(c, d, a, b, x[i + 10], 15, -1051523);
-	          b = md5_ii(b, c, d, a, x[i + 1], 21, -2054922799);
-	          a = md5_ii(a, b, c, d, x[i + 8], 6, 1873313359);
-	          d = md5_ii(d, a, b, c, x[i + 15], 10, -30611744);
-	          c = md5_ii(c, d, a, b, x[i + 6], 15, -1560198380);
-	          b = md5_ii(b, c, d, a, x[i + 13], 21, 1309151649);
-	          a = md5_ii(a, b, c, d, x[i + 4], 6, -145523070);
-	          d = md5_ii(d, a, b, c, x[i + 11], 10, -1120210379);
-	          c = md5_ii(c, d, a, b, x[i + 2], 15, 718787259);
-	          b = md5_ii(b, c, d, a, x[i + 9], 21, -343485551);
-
-	          a = safe_add(a, olda);
-	          b = safe_add(b, oldb);
-	          c = safe_add(c, oldc);
-	          d = safe_add(d, oldd);
-	        }
-	        return Array(a, b, c, d);
-	      }
+	  var _inProcess; // Returns a Promise to process the queue
 
-	      /**
-	       * These functions implement the four basic operations the algorithm uses.
-	       */
 
-	      function md5_cmn(q, a, b, x, s, t) {
-	        return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);
-	      }
+	  function processQueue() {
+	    if (!_queue.length) return Promise.resolve(); // console.log(`queue length ${_queue.length}`);
 
-	      function md5_ff(a, b, c, d, x, s, t) {
-	        return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
-	      }
+	    var chunk = _queue.pop();
 
-	      function md5_gg(a, b, c, d, x, s, t) {
-	        return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
-	      }
+	    return new Promise(function (resolvePromise) {
+	      var handle = window.requestIdleCallback(function () {
+	        _deferred["delete"](handle); // const t0 = performance.now();
 
-	      function md5_hh(a, b, c, d, x, s, t) {
-	        return md5_cmn(b ^ c ^ d, a, b, x, s, t);
-	      }
 
-	      function md5_ii(a, b, c, d, x, s, t) {
-	        return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
-	      }
-	    },
-	    /**
-	     * @member Hashes
-	     * @class Hashes.SHA1
-	     * @param {Object} [config]
-	     * @constructor
-	     *
-	     * A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined in FIPS 180-1
-	     * Version 2.2 Copyright Paul Johnston 2000 - 2009.
-	     * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
-	     * See http://pajhome.org.uk/crypt/md5 for details.
-	     */
-	    SHA1: function(options) {
-	      /**
-	       * Private config properties. You may need to tweak these to be compatible with
-	       * the server-side, but the defaults work in most cases.
-	       * See {@link Hashes.MD5#method-setUpperCase} and {@link Hashes.SHA1#method-setUpperCase}
-	       */
-	      var hexcase = (options && typeof options.uppercase === 'boolean') ? options.uppercase : false, // hexadecimal output case format. false - lowercase; true - uppercase
-	        b64pad = (options && typeof options.pad === 'string') ? options.pad : '=', // base-64 pad character. Defaults to '=' for strict RFC compliance
-	        utf8 = (options && typeof options.utf8 === 'boolean') ? options.utf8 : true; // enable/disable utf8 encoding
+	        chunk.forEach(resolveLocationSet); // const t1 = performance.now();
+	        // console.log('chunk processed in ' + (t1 - t0) + ' ms');
 
-	      // public methods
-	      this.hex = function(s) {
-	        return rstr2hex(rstr(s), hexcase);
-	      };
-	      this.b64 = function(s) {
-	        return rstr2b64(rstr(s), b64pad);
-	      };
-	      this.any = function(s, e) {
-	        return rstr2any(rstr(s), e);
-	      };
-	      this.raw = function(s) {
-	        return rstr(s);
-	      };
-	      this.hex_hmac = function(k, d) {
-	        return rstr2hex(rstr_hmac(k, d));
-	      };
-	      this.b64_hmac = function(k, d) {
-	        return rstr2b64(rstr_hmac(k, d), b64pad);
-	      };
-	      this.any_hmac = function(k, d, e) {
-	        return rstr2any(rstr_hmac(k, d), e);
-	      };
-	      /**
-	       * Perform a simple self-test to see if the VM is working
-	       * @return {String} Hexadecimal hash sample
-	       * @public
-	       */
-	      this.vm_test = function() {
-	        return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-	      };
-	      /**
-	       * @description Enable/disable uppercase hexadecimal returned string
-	       * @param {boolean}
-	       * @return {Object} this
-	       * @public
-	       */
-	      this.setUpperCase = function(a) {
-	        if (typeof a === 'boolean') {
-	          hexcase = a;
-	        }
-	        return this;
-	      };
-	      /**
-	       * @description Defines a base64 pad string
-	       * @param {string} Pad
-	       * @return {Object} this
-	       * @public
-	       */
-	      this.setPad = function(a) {
-	        b64pad = a || b64pad;
-	        return this;
-	      };
-	      /**
-	       * @description Defines a base64 pad string
-	       * @param {boolean}
-	       * @return {Object} this
-	       * @public
-	       */
-	      this.setUTF8 = function(a) {
-	        if (typeof a === 'boolean') {
-	          utf8 = a;
-	        }
-	        return this;
-	      };
+	        resolvePromise();
+	      });
 
-	      // private methods
+	      _deferred.add(handle);
+	    }).then(function () {
+	      return processQueue();
+	    });
+	  } // Pass an Object with a `locationSet` property,
+	  // Performs the locationSet resolution, caches the result, and sets a `locationSetID` property on the object.
 
-	      /**
-	       * Calculate the SHA-512 of a raw string
-	       */
 
-	      function rstr(s) {
-	        s = (utf8) ? utf8Encode(s) : s;
-	        return binb2rstr(binb(rstr2binb(s), s.length * 8));
-	      }
+	  function resolveLocationSet(obj) {
+	    if (obj.locationSetID) return; // work was done already
 
-	      /**
-	       * Calculate the HMAC-SHA1 of a key and some data (raw strings)
-	       */
+	    try {
+	      var locationSet = obj.locationSet;
 
-	      function rstr_hmac(key, data) {
-	        var bkey, ipad, opad, i, hash;
-	        key = (utf8) ? utf8Encode(key) : key;
-	        data = (utf8) ? utf8Encode(data) : data;
-	        bkey = rstr2binb(key);
+	      if (!locationSet) {
+	        throw new Error('object missing locationSet property');
+	      }
 
-	        if (bkey.length > 16) {
-	          bkey = binb(bkey, key.length * 8);
-	        }
-	        ipad = Array(16), opad = Array(16);
-	        for (i = 0; i < 16; i += 1) {
-	          ipad[i] = bkey[i] ^ 0x36363636;
-	          opad[i] = bkey[i] ^ 0x5C5C5C5C;
-	        }
-	        hash = binb(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
-	        return binb2rstr(binb(opad.concat(hash), 512 + 160));
+	      if (!locationSet.include) {
+	        // missing `include`, default to worldwide include
+	        locationSet.include = ['Q2']; // https://github.com/openstreetmap/iD/pull/8305#discussion_r662344647
 	      }
 
-	      /**
-	       * Calculate the SHA-1 of an array of big-endian words, and a bit length
-	       */
+	      var resolved = _loco.resolveLocationSet(locationSet);
 
-	      function binb(x, len) {
-	        var i, j, t, olda, oldb, oldc, oldd, olde,
-	          w = Array(80),
-	          a = 1732584193,
-	          b = -271733879,
-	          c = -1732584194,
-	          d = 271733878,
-	          e = -1009589776;
-
-	        /* append padding */
-	        x[len >> 5] |= 0x80 << (24 - len % 32);
-	        x[((len + 64 >> 9) << 4) + 15] = len;
-
-	        for (i = 0; i < x.length; i += 16) {
-	          olda = a;
-	          oldb = b;
-	          oldc = c;
-	          oldd = d;
-	          olde = e;
-
-	          for (j = 0; j < 80; j += 1) {
-	            if (j < 16) {
-	              w[j] = x[i + j];
-	            } else {
-	              w[j] = bit_rol(w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16], 1);
-	            }
-	            t = safe_add(safe_add(bit_rol(a, 5), sha1_ft(j, b, c, d)),
-	              safe_add(safe_add(e, w[j]), sha1_kt(j)));
-	            e = d;
-	            d = c;
-	            c = bit_rol(b, 30);
-	            b = a;
-	            a = t;
-	          }
+	      var locationSetID = resolved.id;
+	      obj.locationSetID = locationSetID;
 
-	          a = safe_add(a, olda);
-	          b = safe_add(b, oldb);
-	          c = safe_add(c, oldc);
-	          d = safe_add(d, oldd);
-	          e = safe_add(e, olde);
-	        }
-	        return Array(a, b, c, d, e);
+	      if (!resolved.feature.geometry.coordinates.length || !resolved.feature.properties.area) {
+	        throw new Error("locationSet ".concat(locationSetID, " resolves to an empty feature."));
 	      }
 
-	      /**
-	       * Perform the appropriate triplet combination function for the current
-	       * iteration
-	       */
+	      if (!_resolvedFeatures[locationSetID]) {
+	        // First time seeing this locationSet feature
+	        var feature = JSON.parse(JSON.stringify(resolved.feature)); // deep clone
 
-	      function sha1_ft(t, b, c, d) {
-	        if (t < 20) {
-	          return (b & c) | ((~b) & d);
-	        }
-	        if (t < 40) {
-	          return b ^ c ^ d;
-	        }
-	        if (t < 60) {
-	          return (b & c) | (b & d) | (c & d);
-	        }
-	        return b ^ c ^ d;
+	        feature.id = locationSetID; // Important: always use the locationSet `id` (`+[Q30]`), not the feature `id` (`Q30`)
+
+	        feature.properties.id = locationSetID;
+	        _resolvedFeatures[locationSetID] = feature; // insert into cache
 	      }
+	    } catch (err) {
+	      obj.locationSet = {
+	        include: ['Q2']
+	      }; // default worldwide
 
-	      /**
-	       * Determine the appropriate additive constant for the current iteration
-	       */
+	      obj.locationSetID = '+[Q2]';
+	    }
+	  } // Rebuilds the whichPolygon index with whatever features have been resolved.
 
-	      function sha1_kt(t) {
-	        return (t < 20) ? 1518500249 : (t < 40) ? 1859775393 :
-	          (t < 60) ? -1894007588 : -899497514;
-	      }
-	    },
-	    /**
-	     * @class Hashes.SHA256
-	     * @param {config}
-	     *
-	     * A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined in FIPS 180-2
-	     * Version 2.2 Copyright Angel Marin, Paul Johnston 2000 - 2009.
-	     * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
-	     * See http://pajhome.org.uk/crypt/md5 for details.
-	     * Also http://anmar.eu.org/projects/jssha2/
-	     */
-	    SHA256: function(options) {
-	      /**
-	       * Private properties configuration variables. You may need to tweak these to be compatible with
-	       * the server-side, but the defaults work in most cases.
-	       * @see this.setUpperCase() method
-	       * @see this.setPad() method
-	       */
-	      var hexcase = (options && typeof options.uppercase === 'boolean') ? options.uppercase : false, // hexadecimal output case format. false - lowercase; true - uppercase  */
-	        b64pad = (options && typeof options.pad === 'string') ? options.pad : '=',
-	        /* base-64 pad character. Default '=' for strict RFC compliance   */
-	        utf8 = (options && typeof options.utf8 === 'boolean') ? options.utf8 : true,
-	        /* enable/disable utf8 encoding */
-	        sha256_K;
 
-	      /* privileged (public) methods */
-	      this.hex = function(s) {
-	        return rstr2hex(rstr(s, utf8));
-	      };
-	      this.b64 = function(s) {
-	        return rstr2b64(rstr(s, utf8), b64pad);
-	      };
-	      this.any = function(s, e) {
-	        return rstr2any(rstr(s, utf8), e);
-	      };
-	      this.raw = function(s) {
-	        return rstr(s, utf8);
-	      };
-	      this.hex_hmac = function(k, d) {
-	        return rstr2hex(rstr_hmac(k, d));
-	      };
-	      this.b64_hmac = function(k, d) {
-	        return rstr2b64(rstr_hmac(k, d), b64pad);
-	      };
-	      this.any_hmac = function(k, d, e) {
-	        return rstr2any(rstr_hmac(k, d), e);
-	      };
-	      /**
-	       * Perform a simple self-test to see if the VM is working
-	       * @return {String} Hexadecimal hash sample
-	       * @public
-	       */
-	      this.vm_test = function() {
-	        return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-	      };
-	      /**
-	       * Enable/disable uppercase hexadecimal returned string
-	       * @param {boolean}
-	       * @return {Object} this
-	       * @public
-	       */
-	      this.setUpperCase = function(a) {
-	        if (typeof a === 'boolean') {
-	          hexcase = a;
-	        }
-	        return this;
-	      };
-	      /**
-	       * @description Defines a base64 pad string
-	       * @param {string} Pad
-	       * @return {Object} this
-	       * @public
-	       */
-	      this.setPad = function(a) {
-	        b64pad = a || b64pad;
-	        return this;
-	      };
-	      /**
-	       * Defines a base64 pad string
-	       * @param {boolean}
-	       * @return {Object} this
-	       * @public
-	       */
-	      this.setUTF8 = function(a) {
-	        if (typeof a === 'boolean') {
-	          utf8 = a;
-	        }
-	        return this;
-	      };
+	  function rebuildIndex() {
+	    _wp = whichPolygon_1({
+	      features: Object.values(_resolvedFeatures)
+	    });
+	  } //
+	  // `mergeCustomGeoJSON`
+	  //  Accepts an FeatureCollection-like object containing custom locations
+	  //  Each feature must have a filename-like `id`, for example: `something.geojson`
+	  //
+	  //  {
+	  //    "type": "FeatureCollection"
+	  //    "features": [
+	  //      {
+	  //        "type": "Feature",
+	  //        "id": "philly_metro.geojson",
+	  //        "properties": { … },
+	  //        "geometry": { … }
+	  //      }
+	  //    ]
+	  //  }
+	  //
 
-	      // private methods
 
-	      /**
-	       * Calculate the SHA-512 of a raw string
-	       */
+	  _this.mergeCustomGeoJSON = function (fc) {
+	    if (fc && fc.type === 'FeatureCollection' && Array.isArray(fc.features)) {
+	      fc.features.forEach(function (feature) {
+	        feature.properties = feature.properties || {};
+	        var props = feature.properties; // Get `id` from either `id` or `properties`
 
-	      function rstr(s, utf8) {
-	        s = (utf8) ? utf8Encode(s) : s;
-	        return binb2rstr(binb(rstr2binb(s), s.length * 8));
-	      }
+	        var id = feature.id || props.id;
+	        if (!id || !/^\S+\.geojson$/i.test(id)) return; // Ensure `id` exists and is lowercase
 
-	      /**
-	       * Calculate the HMAC-sha256 of a key and some data (raw strings)
-	       */
+	        id = id.toLowerCase();
+	        feature.id = id;
+	        props.id = id; // Ensure `area` property exists
 
-	      function rstr_hmac(key, data) {
-	        key = (utf8) ? utf8Encode(key) : key;
-	        data = (utf8) ? utf8Encode(data) : data;
-	        var hash, i = 0,
-	          bkey = rstr2binb(key),
-	          ipad = Array(16),
-	          opad = Array(16);
+	        if (!props.area) {
+	          var area = geojsonArea.geometry(feature.geometry) / 1e6; // m² to km²
 
-	        if (bkey.length > 16) {
-	          bkey = binb(bkey, key.length * 8);
+	          props.area = Number(area.toFixed(2));
 	        }
 
-	        for (; i < 16; i += 1) {
-	          ipad[i] = bkey[i] ^ 0x36363636;
-	          opad[i] = bkey[i] ^ 0x5C5C5C5C;
-	        }
+	        _loco._cache[id] = feature;
+	      });
+	    }
+	  }; //
+	  // `mergeLocationSets`
+	  //  Accepts an Array of Objects containing `locationSet` properties.
+	  //  The locationSets will be resolved and indexed in the background.
+	  //  [
+	  //   { id: 'preset1', locationSet: {…} },
+	  //   { id: 'preset2', locationSet: {…} },
+	  //   { id: 'preset3', locationSet: {…} },
+	  //   …
+	  //  ]
+	  //  After resolving and indexing, the Objects will be decorated with a
+	  //  `locationSetID` property.
+	  //  [
+	  //   { id: 'preset1', locationSet: {…}, locationSetID: '+[Q2]' },
+	  //   { id: 'preset2', locationSet: {…}, locationSetID: '+[Q30]' },
+	  //   { id: 'preset3', locationSet: {…}, locationSetID: '+[Q2]' },
+	  //   …
+	  //  ]
+	  //
+	  //  Returns a Promise fulfilled when the resolving/indexing has been completed
+	  //  This will take some seconds but happen in the background during browser idle time.
+	  //
 
-	        hash = binb(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
-	        return binb2rstr(binb(opad.concat(hash), 512 + 256));
-	      }
 
-	      /*
-	       * Main sha256 function, with its support functions
-	       */
+	  _this.mergeLocationSets = function (objects) {
+	    if (!Array.isArray(objects)) return Promise.reject('nothing to do'); // Resolve all locationSets -> geojson, processing data in chunks
+	    //
+	    // Because this will happen during idle callbacks, we want to choose a chunk size
+	    // that won't make the browser stutter too badly.  LocationSets that are a simple
+	    // country coder include will resolve instantly, but ones that involve complex
+	    // include/exclude operations will take some milliseconds longer.
+	    //
+	    // Some discussion and performance results on these tickets:
+	    // https://github.com/ideditor/location-conflation/issues/26
+	    // https://github.com/osmlab/name-suggestion-index/issues/4784#issuecomment-742003434
 
-	      function sha256_S(X, n) {
-	        return (X >>> n) | (X << (32 - n));
-	      }
+	    _queue = _queue.concat(utilArrayChunk(objects, 200));
 
-	      function sha256_R(X, n) {
-	        return (X >>> n);
-	      }
+	    if (!_inProcess) {
+	      _inProcess = processQueue().then(function () {
+	        rebuildIndex();
+	        _inProcess = null;
+	        return objects;
+	      });
+	    }
 
-	      function sha256_Ch(x, y, z) {
-	        return ((x & y) ^ ((~x) & z));
-	      }
+	    return _inProcess;
+	  }; //
+	  // `locationSetID`
+	  // Returns a locationSetID for a given locationSet (fallback to `+[Q2]`, world)
+	  // (The locationset doesn't necessarily need to be resolved to compute its `id`)
+	  //
+	  // Arguments
+	  //   `locationSet`: A locationSet, e.g. `{ include: ['us'] }`
+	  // Returns
+	  //   The locationSetID, e.g. `+[Q30]`
+	  //
 
-	      function sha256_Maj(x, y, z) {
-	        return ((x & y) ^ (x & z) ^ (y & z));
-	      }
 
-	      function sha256_Sigma0256(x) {
-	        return (sha256_S(x, 2) ^ sha256_S(x, 13) ^ sha256_S(x, 22));
-	      }
+	  _this.locationSetID = function (locationSet) {
+	    var locationSetID;
 
-	      function sha256_Sigma1256(x) {
-	        return (sha256_S(x, 6) ^ sha256_S(x, 11) ^ sha256_S(x, 25));
-	      }
+	    try {
+	      locationSetID = _loco.validateLocationSet(locationSet).id;
+	    } catch (err) {
+	      locationSetID = '+[Q2]'; // the world
+	    }
 
-	      function sha256_Gamma0256(x) {
-	        return (sha256_S(x, 7) ^ sha256_S(x, 18) ^ sha256_R(x, 3));
-	      }
+	    return locationSetID;
+	  }; //
+	  // `feature`
+	  // Returns the resolved GeoJSON feature for a given locationSetID (fallback to 'world')
+	  //
+	  // Arguments
+	  //   `locationSetID`: id of the form like `+[Q30]`  (United States)
+	  // Returns
+	  //   A GeoJSON feature:
+	  //   {
+	  //     type: 'Feature',
+	  //     id: '+[Q30]',
+	  //     properties: { id: '+[Q30]', area: 21817019.17, … },
+	  //     geometry: { … }
+	  //   }
+
+
+	  _this.feature = function (locationSetID) {
+	    return _resolvedFeatures[locationSetID] || _resolvedFeatures['+[Q2]'];
+	  }; //
+	  // `locationsAt`
+	  // Find all the resolved locationSets valid at the given location.
+	  // Results include the area (in km²) to facilitate sorting.
+	  //
+	  // Arguments
+	  //   `loc`: the [lon,lat] location to query, e.g. `[-74.4813, 40.7967]`
+	  // Returns
+	  //   Object of locationSetIDs to areas (in km²)
+	  //   {
+	  //     "+[Q2]": 511207893.3958111,
+	  //     "+[Q30]": 21817019.17,
+	  //     "+[new_jersey.geojson]": 22390.77,
+	  //     …
+	  //   }
+	  //
 
-	      function sha256_Gamma1256(x) {
-	        return (sha256_S(x, 17) ^ sha256_S(x, 19) ^ sha256_R(x, 10));
-	      }
 
-	      sha256_K = [
-	        1116352408, 1899447441, -1245643825, -373957723, 961987163, 1508970993, -1841331548, -1424204075, -670586216, 310598401, 607225278, 1426881987,
-	        1925078388, -2132889090, -1680079193, -1046744716, -459576895, -272742522,
-	        264347078, 604807628, 770255983, 1249150122, 1555081692, 1996064986, -1740746414, -1473132947, -1341970488, -1084653625, -958395405, -710438585,
-	        113926993, 338241895, 666307205, 773529912, 1294757372, 1396182291,
-	        1695183700, 1986661051, -2117940946, -1838011259, -1564481375, -1474664885, -1035236496, -949202525, -778901479, -694614492, -200395387, 275423344,
-	        430227734, 506948616, 659060556, 883997877, 958139571, 1322822218,
-	        1537002063, 1747873779, 1955562222, 2024104815, -2067236844, -1933114872, -1866530822, -1538233109, -1090935817, -965641998
-	      ];
+	  _this.locationsAt = function (loc) {
+	    var result = {};
+	    (_wp(loc, true) || []).forEach(function (prop) {
+	      return result[prop.id] = prop.area;
+	    });
+	    return result;
+	  }; //
+	  // `query`
+	  // Execute a query directly against which-polygon
+	  // https://github.com/mapbox/which-polygon
+	  //
+	  // Arguments
+	  //   `loc`: the [lon,lat] location to query,
+	  //   `multi`: `true` to return all results, `false` to return first result
+	  // Returns
+	  //   Array of GeoJSON *properties* for the locationSet features that exist at `loc`
+	  //
 
-	      function binb(m, l) {
-	        var HASH = [1779033703, -1150833019, 1013904242, -1521486534,
-	          1359893119, -1694144372, 528734635, 1541459225
-	        ];
-	        var W = new Array(64);
-	        var a, b, c, d, e, f, g, h;
-	        var i, j, T1, T2;
-
-	        /* append padding */
-	        m[l >> 5] |= 0x80 << (24 - l % 32);
-	        m[((l + 64 >> 9) << 4) + 15] = l;
-
-	        for (i = 0; i < m.length; i += 16) {
-	          a = HASH[0];
-	          b = HASH[1];
-	          c = HASH[2];
-	          d = HASH[3];
-	          e = HASH[4];
-	          f = HASH[5];
-	          g = HASH[6];
-	          h = HASH[7];
-
-	          for (j = 0; j < 64; j += 1) {
-	            if (j < 16) {
-	              W[j] = m[j + i];
-	            } else {
-	              W[j] = safe_add(safe_add(safe_add(sha256_Gamma1256(W[j - 2]), W[j - 7]),
-	                sha256_Gamma0256(W[j - 15])), W[j - 16]);
-	            }
 
-	            T1 = safe_add(safe_add(safe_add(safe_add(h, sha256_Sigma1256(e)), sha256_Ch(e, f, g)),
-	              sha256_K[j]), W[j]);
-	            T2 = safe_add(sha256_Sigma0256(a), sha256_Maj(a, b, c));
-	            h = g;
-	            g = f;
-	            f = e;
-	            e = safe_add(d, T1);
-	            d = c;
-	            c = b;
-	            b = a;
-	            a = safe_add(T1, T2);
-	          }
+	  _this.query = function (loc, multi) {
+	    return _wp(loc, multi);
+	  }; // Direct access to the location-conflation resolver
 
-	          HASH[0] = safe_add(a, HASH[0]);
-	          HASH[1] = safe_add(b, HASH[1]);
-	          HASH[2] = safe_add(c, HASH[2]);
-	          HASH[3] = safe_add(d, HASH[3]);
-	          HASH[4] = safe_add(e, HASH[4]);
-	          HASH[5] = safe_add(f, HASH[5]);
-	          HASH[6] = safe_add(g, HASH[6]);
-	          HASH[7] = safe_add(h, HASH[7]);
-	        }
-	        return HASH;
-	      }
 
-	    },
+	  _this.loco = function () {
+	    return _loco;
+	  }; // Direct access to the which-polygon index
 
-	    /**
-	     * @class Hashes.SHA512
-	     * @param {config}
-	     *
-	     * A JavaScript implementation of the Secure Hash Algorithm, SHA-512, as defined in FIPS 180-2
-	     * Version 2.2 Copyright Anonymous Contributor, Paul Johnston 2000 - 2009.
-	     * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
-	     * See http://pajhome.org.uk/crypt/md5 for details.
-	     */
-	    SHA512: function(options) {
-	      /**
-	       * Private properties configuration variables. You may need to tweak these to be compatible with
-	       * the server-side, but the defaults work in most cases.
-	       * @see this.setUpperCase() method
-	       * @see this.setPad() method
-	       */
-	      var hexcase = (options && typeof options.uppercase === 'boolean') ? options.uppercase : false,
-	        /* hexadecimal output case format. false - lowercase; true - uppercase  */
-	        b64pad = (options && typeof options.pad === 'string') ? options.pad : '=',
-	        /* base-64 pad character. Default '=' for strict RFC compliance   */
-	        utf8 = (options && typeof options.utf8 === 'boolean') ? options.utf8 : true,
-	        /* enable/disable utf8 encoding */
-	        sha512_k;
 
-	      /* privileged (public) methods */
-	      this.hex = function(s) {
-	        return rstr2hex(rstr(s));
-	      };
-	      this.b64 = function(s) {
-	        return rstr2b64(rstr(s), b64pad);
-	      };
-	      this.any = function(s, e) {
-	        return rstr2any(rstr(s), e);
-	      };
-	      this.raw = function(s) {
-	        return rstr(s);
-	      };
-	      this.hex_hmac = function(k, d) {
-	        return rstr2hex(rstr_hmac(k, d));
-	      };
-	      this.b64_hmac = function(k, d) {
-	        return rstr2b64(rstr_hmac(k, d), b64pad);
-	      };
-	      this.any_hmac = function(k, d, e) {
-	        return rstr2any(rstr_hmac(k, d), e);
-	      };
-	      /**
-	       * Perform a simple self-test to see if the VM is working
-	       * @return {String} Hexadecimal hash sample
-	       * @public
-	       */
-	      this.vm_test = function() {
-	        return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-	      };
-	      /**
-	       * @description Enable/disable uppercase hexadecimal returned string
-	       * @param {boolean}
-	       * @return {Object} this
-	       * @public
-	       */
-	      this.setUpperCase = function(a) {
-	        if (typeof a === 'boolean') {
-	          hexcase = a;
-	        }
-	        return this;
-	      };
-	      /**
-	       * @description Defines a base64 pad string
-	       * @param {string} Pad
-	       * @return {Object} this
-	       * @public
-	       */
-	      this.setPad = function(a) {
-	        b64pad = a || b64pad;
-	        return this;
-	      };
-	      /**
-	       * @description Defines a base64 pad string
-	       * @param {boolean}
-	       * @return {Object} this
-	       * @public
-	       */
-	      this.setUTF8 = function(a) {
-	        if (typeof a === 'boolean') {
-	          utf8 = a;
-	        }
-	        return this;
-	      };
+	  _this.wp = function () {
+	    return _wp;
+	  };
 
-	      /* private methods */
+	  return _this;
+	}
 
-	      /**
-	       * Calculate the SHA-512 of a raw string
-	       */
+	var $$a = _export;
+	var $findIndex = arrayIteration.findIndex;
+	var addToUnscopables = addToUnscopables$5;
 
-	      function rstr(s) {
-	        s = (utf8) ? utf8Encode(s) : s;
-	        return binb2rstr(binb(rstr2binb(s), s.length * 8));
-	      }
-	      /*
-	       * Calculate the HMAC-SHA-512 of a key and some data (raw strings)
-	       */
+	var FIND_INDEX = 'findIndex';
+	var SKIPS_HOLES = true;
 
-	      function rstr_hmac(key, data) {
-	        key = (utf8) ? utf8Encode(key) : key;
-	        data = (utf8) ? utf8Encode(data) : data;
+	// Shouldn't skip holes
+	if (FIND_INDEX in []) Array(1)[FIND_INDEX](function () { SKIPS_HOLES = false; });
 
-	        var hash, i = 0,
-	          bkey = rstr2binb(key),
-	          ipad = Array(32),
-	          opad = Array(32);
+	// `Array.prototype.findIndex` method
+	// https://tc39.es/ecma262/#sec-array.prototype.findindex
+	$$a({ target: 'Array', proto: true, forced: SKIPS_HOLES }, {
+	  findIndex: function findIndex(callbackfn /* , that = undefined */) {
+	    return $findIndex(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
 
-	        if (bkey.length > 32) {
-	          bkey = binb(bkey, key.length * 8);
-	        }
+	// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+	addToUnscopables(FIND_INDEX);
 
-	        for (; i < 32; i += 1) {
-	          ipad[i] = bkey[i] ^ 0x36363636;
-	          opad[i] = bkey[i] ^ 0x5C5C5C5C;
-	        }
+	var isRegExp = isRegexp;
 
-	        hash = binb(ipad.concat(rstr2binb(data)), 1024 + data.length * 8);
-	        return binb2rstr(binb(opad.concat(hash), 1024 + 512));
-	      }
+	var notARegexp = function (it) {
+	  if (isRegExp(it)) {
+	    throw TypeError("The method doesn't accept regular expressions");
+	  } return it;
+	};
 
-	      /**
-	       * Calculate the SHA-512 of an array of big-endian dwords, and a bit length
-	       */
+	var wellKnownSymbol = wellKnownSymbol$s;
 
-	      function binb(x, len) {
-	        var j, i, l,
-	          W = new Array(80),
-	          hash = new Array(16),
-	          //Initial hash values
-	          H = [
-	            new int64(0x6a09e667, -205731576),
-	            new int64(-1150833019, -2067093701),
-	            new int64(0x3c6ef372, -23791573),
-	            new int64(-1521486534, 0x5f1d36f1),
-	            new int64(0x510e527f, -1377402159),
-	            new int64(-1694144372, 0x2b3e6c1f),
-	            new int64(0x1f83d9ab, -79577749),
-	            new int64(0x5be0cd19, 0x137e2179)
-	          ],
-	          T1 = new int64(0, 0),
-	          T2 = new int64(0, 0),
-	          a = new int64(0, 0),
-	          b = new int64(0, 0),
-	          c = new int64(0, 0),
-	          d = new int64(0, 0),
-	          e = new int64(0, 0),
-	          f = new int64(0, 0),
-	          g = new int64(0, 0),
-	          h = new int64(0, 0),
-	          //Temporary variables not specified by the document
-	          s0 = new int64(0, 0),
-	          s1 = new int64(0, 0),
-	          Ch = new int64(0, 0),
-	          Maj = new int64(0, 0),
-	          r1 = new int64(0, 0),
-	          r2 = new int64(0, 0),
-	          r3 = new int64(0, 0);
-
-	        if (sha512_k === undefined) {
-	          //SHA512 constants
-	          sha512_k = [
-	            new int64(0x428a2f98, -685199838), new int64(0x71374491, 0x23ef65cd),
-	            new int64(-1245643825, -330482897), new int64(-373957723, -2121671748),
-	            new int64(0x3956c25b, -213338824), new int64(0x59f111f1, -1241133031),
-	            new int64(-1841331548, -1357295717), new int64(-1424204075, -630357736),
-	            new int64(-670586216, -1560083902), new int64(0x12835b01, 0x45706fbe),
-	            new int64(0x243185be, 0x4ee4b28c), new int64(0x550c7dc3, -704662302),
-	            new int64(0x72be5d74, -226784913), new int64(-2132889090, 0x3b1696b1),
-	            new int64(-1680079193, 0x25c71235), new int64(-1046744716, -815192428),
-	            new int64(-459576895, -1628353838), new int64(-272742522, 0x384f25e3),
-	            new int64(0xfc19dc6, -1953704523), new int64(0x240ca1cc, 0x77ac9c65),
-	            new int64(0x2de92c6f, 0x592b0275), new int64(0x4a7484aa, 0x6ea6e483),
-	            new int64(0x5cb0a9dc, -1119749164), new int64(0x76f988da, -2096016459),
-	            new int64(-1740746414, -295247957), new int64(-1473132947, 0x2db43210),
-	            new int64(-1341970488, -1728372417), new int64(-1084653625, -1091629340),
-	            new int64(-958395405, 0x3da88fc2), new int64(-710438585, -1828018395),
-	            new int64(0x6ca6351, -536640913), new int64(0x14292967, 0xa0e6e70),
-	            new int64(0x27b70a85, 0x46d22ffc), new int64(0x2e1b2138, 0x5c26c926),
-	            new int64(0x4d2c6dfc, 0x5ac42aed), new int64(0x53380d13, -1651133473),
-	            new int64(0x650a7354, -1951439906), new int64(0x766a0abb, 0x3c77b2a8),
-	            new int64(-2117940946, 0x47edaee6), new int64(-1838011259, 0x1482353b),
-	            new int64(-1564481375, 0x4cf10364), new int64(-1474664885, -1136513023),
-	            new int64(-1035236496, -789014639), new int64(-949202525, 0x654be30),
-	            new int64(-778901479, -688958952), new int64(-694614492, 0x5565a910),
-	            new int64(-200395387, 0x5771202a), new int64(0x106aa070, 0x32bbd1b8),
-	            new int64(0x19a4c116, -1194143544), new int64(0x1e376c08, 0x5141ab53),
-	            new int64(0x2748774c, -544281703), new int64(0x34b0bcb5, -509917016),
-	            new int64(0x391c0cb3, -976659869), new int64(0x4ed8aa4a, -482243893),
-	            new int64(0x5b9cca4f, 0x7763e373), new int64(0x682e6ff3, -692930397),
-	            new int64(0x748f82ee, 0x5defb2fc), new int64(0x78a5636f, 0x43172f60),
-	            new int64(-2067236844, -1578062990), new int64(-1933114872, 0x1a6439ec),
-	            new int64(-1866530822, 0x23631e28), new int64(-1538233109, -561857047),
-	            new int64(-1090935817, -1295615723), new int64(-965641998, -479046869),
-	            new int64(-903397682, -366583396), new int64(-779700025, 0x21c0c207),
-	            new int64(-354779690, -840897762), new int64(-176337025, -294727304),
-	            new int64(0x6f067aa, 0x72176fba), new int64(0xa637dc5, -1563912026),
-	            new int64(0x113f9804, -1090974290), new int64(0x1b710b35, 0x131c471b),
-	            new int64(0x28db77f5, 0x23047d84), new int64(0x32caab7b, 0x40c72493),
-	            new int64(0x3c9ebe0a, 0x15c9bebc), new int64(0x431d67c4, -1676669620),
-	            new int64(0x4cc5d4be, -885112138), new int64(0x597f299c, -60457430),
-	            new int64(0x5fcb6fab, 0x3ad6faec), new int64(0x6c44198c, 0x4a475817)
-	          ];
-	        }
-
-	        for (i = 0; i < 80; i += 1) {
-	          W[i] = new int64(0, 0);
-	        }
-
-	        // append padding to the source string. The format is described in the FIPS.
-	        x[len >> 5] |= 0x80 << (24 - (len & 0x1f));
-	        x[((len + 128 >> 10) << 5) + 31] = len;
-	        l = x.length;
-	        for (i = 0; i < l; i += 32) { //32 dwords is the block size
-	          int64copy(a, H[0]);
-	          int64copy(b, H[1]);
-	          int64copy(c, H[2]);
-	          int64copy(d, H[3]);
-	          int64copy(e, H[4]);
-	          int64copy(f, H[5]);
-	          int64copy(g, H[6]);
-	          int64copy(h, H[7]);
-
-	          for (j = 0; j < 16; j += 1) {
-	            W[j].h = x[i + 2 * j];
-	            W[j].l = x[i + 2 * j + 1];
-	          }
+	var MATCH = wellKnownSymbol('match');
 
-	          for (j = 16; j < 80; j += 1) {
-	            //sigma1
-	            int64rrot(r1, W[j - 2], 19);
-	            int64revrrot(r2, W[j - 2], 29);
-	            int64shr(r3, W[j - 2], 6);
-	            s1.l = r1.l ^ r2.l ^ r3.l;
-	            s1.h = r1.h ^ r2.h ^ r3.h;
-	            //sigma0
-	            int64rrot(r1, W[j - 15], 1);
-	            int64rrot(r2, W[j - 15], 8);
-	            int64shr(r3, W[j - 15], 7);
-	            s0.l = r1.l ^ r2.l ^ r3.l;
-	            s0.h = r1.h ^ r2.h ^ r3.h;
-
-	            int64add4(W[j], s1, W[j - 7], s0, W[j - 16]);
-	          }
+	var correctIsRegexpLogic = function (METHOD_NAME) {
+	  var regexp = /./;
+	  try {
+	    '/./'[METHOD_NAME](regexp);
+	  } catch (error1) {
+	    try {
+	      regexp[MATCH] = false;
+	      return '/./'[METHOD_NAME](regexp);
+	    } catch (error2) { /* empty */ }
+	  } return false;
+	};
 
-	          for (j = 0; j < 80; j += 1) {
-	            //Ch
-	            Ch.l = (e.l & f.l) ^ (~e.l & g.l);
-	            Ch.h = (e.h & f.h) ^ (~e.h & g.h);
-
-	            //Sigma1
-	            int64rrot(r1, e, 14);
-	            int64rrot(r2, e, 18);
-	            int64revrrot(r3, e, 9);
-	            s1.l = r1.l ^ r2.l ^ r3.l;
-	            s1.h = r1.h ^ r2.h ^ r3.h;
-
-	            //Sigma0
-	            int64rrot(r1, a, 28);
-	            int64revrrot(r2, a, 2);
-	            int64revrrot(r3, a, 7);
-	            s0.l = r1.l ^ r2.l ^ r3.l;
-	            s0.h = r1.h ^ r2.h ^ r3.h;
-
-	            //Maj
-	            Maj.l = (a.l & b.l) ^ (a.l & c.l) ^ (b.l & c.l);
-	            Maj.h = (a.h & b.h) ^ (a.h & c.h) ^ (b.h & c.h);
-
-	            int64add5(T1, h, s1, Ch, sha512_k[j], W[j]);
-	            int64add(T2, s0, Maj);
-
-	            int64copy(h, g);
-	            int64copy(g, f);
-	            int64copy(f, e);
-	            int64add(e, d, T1);
-	            int64copy(d, c);
-	            int64copy(c, b);
-	            int64copy(b, a);
-	            int64add(a, T1, T2);
-	          }
-	          int64add(H[0], H[0], a);
-	          int64add(H[1], H[1], b);
-	          int64add(H[2], H[2], c);
-	          int64add(H[3], H[3], d);
-	          int64add(H[4], H[4], e);
-	          int64add(H[5], H[5], f);
-	          int64add(H[6], H[6], g);
-	          int64add(H[7], H[7], h);
-	        }
+	var $$9 = _export;
+	var notARegExp$2 = notARegexp;
+	var requireObjectCoercible$3 = requireObjectCoercible$e;
+	var correctIsRegExpLogic$2 = correctIsRegexpLogic;
 
-	        //represent the hash as an array of 32-bit dwords
-	        for (i = 0; i < 8; i += 1) {
-	          hash[2 * i] = H[i].h;
-	          hash[2 * i + 1] = H[i].l;
-	        }
-	        return hash;
-	      }
+	// `String.prototype.includes` method
+	// https://tc39.es/ecma262/#sec-string.prototype.includes
+	$$9({ target: 'String', proto: true, forced: !correctIsRegExpLogic$2('includes') }, {
+	  includes: function includes(searchString /* , position = 0 */) {
+	    return !!~String(requireObjectCoercible$3(this))
+	      .indexOf(notARegExp$2(searchString), arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
+
+	var _mainLocalizer = coreLocalizer(); // singleton
 
-	      //A constructor for 64-bit numbers
 
-	      function int64(h, l) {
-	        this.h = h;
-	        this.l = l;
-	        //this.toString = int64toString;
-	      }
+	var _t = _mainLocalizer.t;
+	// coreLocalizer manages language and locale parameters including translated strings
+	//
 
-	      //Copies src into dst, assuming both are 64-bit numbers
+	function coreLocalizer() {
+	  var localizer = {};
+	  var _dataLanguages = {}; // `_dataLocales` is an object containing all _supported_ locale codes -> language info.
+	  // * `rtl` - right-to-left or left-to-right text direction
+	  // * `pct` - the percent of strings translated; 1 = 100%, full coverage
+	  //
+	  // {
+	  // en: { rtl: false, pct: {…} },
+	  // de: { rtl: false, pct: {…} },
+	  // …
+	  // }
 
-	      function int64copy(dst, src) {
-	        dst.h = src.h;
-	        dst.l = src.l;
-	      }
+	  var _dataLocales = {}; // `localeStrings` is an object containing all _loaded_ locale codes -> string data.
+	  // {
+	  // en: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
+	  // de: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
+	  // …
+	  // }
 
-	      //Right-rotates a 64-bit number by shift
-	      //Won't handle cases of shift>=32
-	      //The function revrrot() is for that
+	  var _localeStrings = {}; // the current locale
 
-	      function int64rrot(dst, x, shift) {
-	        dst.l = (x.l >>> shift) | (x.h << (32 - shift));
-	        dst.h = (x.h >>> shift) | (x.l << (32 - shift));
-	      }
+	  var _localeCode = 'en-US'; // `_localeCodes` must contain `_localeCode` first, optionally followed by fallbacks
 
-	      //Reverses the dwords of the source and then rotates right by shift.
-	      //This is equivalent to rotation by 32+shift
+	  var _localeCodes = ['en-US', 'en'];
+	  var _languageCode = 'en';
+	  var _textDirection = 'ltr';
+	  var _usesMetric = false;
+	  var _languageNames = {};
+	  var _scriptNames = {}; // getters for the current locale parameters
 
-	      function int64revrrot(dst, x, shift) {
-	        dst.l = (x.h >>> shift) | (x.l << (32 - shift));
-	        dst.h = (x.l >>> shift) | (x.h << (32 - shift));
-	      }
+	  localizer.localeCode = function () {
+	    return _localeCode;
+	  };
 
-	      //Bitwise-shifts right a 64-bit number by shift
-	      //Won't handle shift>=32, but it's never needed in SHA512
+	  localizer.localeCodes = function () {
+	    return _localeCodes;
+	  };
 
-	      function int64shr(dst, x, shift) {
-	        dst.l = (x.l >>> shift) | (x.h << (32 - shift));
-	        dst.h = (x.h >>> shift);
-	      }
+	  localizer.languageCode = function () {
+	    return _languageCode;
+	  };
 
-	      //Adds two 64-bit numbers
-	      //Like the original implementation, does not rely on 32-bit operations
+	  localizer.textDirection = function () {
+	    return _textDirection;
+	  };
 
-	      function int64add(dst, x, y) {
-	        var w0 = (x.l & 0xffff) + (y.l & 0xffff);
-	        var w1 = (x.l >>> 16) + (y.l >>> 16) + (w0 >>> 16);
-	        var w2 = (x.h & 0xffff) + (y.h & 0xffff) + (w1 >>> 16);
-	        var w3 = (x.h >>> 16) + (y.h >>> 16) + (w2 >>> 16);
-	        dst.l = (w0 & 0xffff) | (w1 << 16);
-	        dst.h = (w2 & 0xffff) | (w3 << 16);
-	      }
+	  localizer.usesMetric = function () {
+	    return _usesMetric;
+	  };
 
-	      //Same, except with 4 addends. Works faster than adding them one by one.
+	  localizer.languageNames = function () {
+	    return _languageNames;
+	  };
 
-	      function int64add4(dst, a, b, c, d) {
-	        var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff);
-	        var w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (w0 >>> 16);
-	        var w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (w1 >>> 16);
-	        var w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (w2 >>> 16);
-	        dst.l = (w0 & 0xffff) | (w1 << 16);
-	        dst.h = (w2 & 0xffff) | (w3 << 16);
-	      }
+	  localizer.scriptNames = function () {
+	    return _scriptNames;
+	  }; // The client app may want to manually set the locale, regardless of the
+	  // settings provided by the browser
 
-	      //Same, except with 5 addends
 
-	      function int64add5(dst, a, b, c, d, e) {
-	        var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff) + (e.l & 0xffff),
-	          w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (e.l >>> 16) + (w0 >>> 16),
-	          w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (e.h & 0xffff) + (w1 >>> 16),
-	          w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (e.h >>> 16) + (w2 >>> 16);
-	        dst.l = (w0 & 0xffff) | (w1 << 16);
-	        dst.h = (w2 & 0xffff) | (w3 << 16);
-	      }
-	    },
-	    /**
-	     * @class Hashes.RMD160
-	     * @constructor
-	     * @param {Object} [config]
-	     *
-	     * A JavaScript implementation of the RIPEMD-160 Algorithm
-	     * Version 2.2 Copyright Jeremy Lin, Paul Johnston 2000 - 2009.
-	     * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
-	     * See http://pajhome.org.uk/crypt/md5 for details.
-	     * Also http://www.ocf.berkeley.edu/~jjlin/jsotp/
-	     */
-	    RMD160: function(options) {
-	      /**
-	       * Private properties configuration variables. You may need to tweak these to be compatible with
-	       * the server-side, but the defaults work in most cases.
-	       * @see this.setUpperCase() method
-	       * @see this.setPad() method
-	       */
-	      var hexcase = (options && typeof options.uppercase === 'boolean') ? options.uppercase : false,
-	        /* hexadecimal output case format. false - lowercase; true - uppercase  */
-	        b64pad = (options && typeof options.pad === 'string') ? options.pa : '=',
-	        /* base-64 pad character. Default '=' for strict RFC compliance   */
-	        utf8 = (options && typeof options.utf8 === 'boolean') ? options.utf8 : true,
-	        /* enable/disable utf8 encoding */
-	        rmd160_r1 = [
-	          0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
-	          7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8,
-	          3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12,
-	          1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2,
-	          4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13
-	        ],
-	        rmd160_r2 = [
-	          5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12,
-	          6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2,
-	          15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13,
-	          8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14,
-	          12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11
-	        ],
-	        rmd160_s1 = [
-	          11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8,
-	          7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12,
-	          11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5,
-	          11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12,
-	          9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6
-	        ],
-	        rmd160_s2 = [
-	          8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6,
-	          9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11,
-	          9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5,
-	          15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8,
-	          8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11
-	        ];
+	  var _preferredLocaleCodes = [];
 
-	      /* privileged (public) methods */
-	      this.hex = function(s) {
-	        return rstr2hex(rstr(s));
-	      };
-	      this.b64 = function(s) {
-	        return rstr2b64(rstr(s), b64pad);
-	      };
-	      this.any = function(s, e) {
-	        return rstr2any(rstr(s), e);
-	      };
-	      this.raw = function(s) {
-	        return rstr(s);
-	      };
-	      this.hex_hmac = function(k, d) {
-	        return rstr2hex(rstr_hmac(k, d));
-	      };
-	      this.b64_hmac = function(k, d) {
-	        return rstr2b64(rstr_hmac(k, d), b64pad);
-	      };
-	      this.any_hmac = function(k, d, e) {
-	        return rstr2any(rstr_hmac(k, d), e);
-	      };
-	      /**
-	       * Perform a simple self-test to see if the VM is working
-	       * @return {String} Hexadecimal hash sample
-	       * @public
-	       */
-	      this.vm_test = function() {
-	        return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-	      };
-	      /**
-	       * @description Enable/disable uppercase hexadecimal returned string
-	       * @param {boolean}
-	       * @return {Object} this
-	       * @public
-	       */
-	      this.setUpperCase = function(a) {
-	        if (typeof a === 'boolean') {
-	          hexcase = a;
-	        }
-	        return this;
-	      };
-	      /**
-	       * @description Defines a base64 pad string
-	       * @param {string} Pad
-	       * @return {Object} this
-	       * @public
-	       */
-	      this.setPad = function(a) {
-	        if (typeof a !== 'undefined') {
-	          b64pad = a;
-	        }
-	        return this;
-	      };
-	      /**
-	       * @description Defines a base64 pad string
-	       * @param {boolean}
-	       * @return {Object} this
-	       * @public
-	       */
-	      this.setUTF8 = function(a) {
-	        if (typeof a === 'boolean') {
-	          utf8 = a;
-	        }
-	        return this;
-	      };
+	  localizer.preferredLocaleCodes = function (codes) {
+	    if (!arguments.length) return _preferredLocaleCodes;
+
+	    if (typeof codes === 'string') {
+	      // be generous and accept delimited strings as input
+	      _preferredLocaleCodes = codes.split(/,|;| /gi).filter(Boolean);
+	    } else {
+	      _preferredLocaleCodes = codes;
+	    }
+
+	    return localizer;
+	  };
+
+	  var _loadPromise;
 
-	      /* private methods */
+	  localizer.ensureLoaded = function () {
+	    if (_loadPromise) return _loadPromise;
+	    var filesToFetch = ['languages', // load the list of languages
+	    'locales' // load the list of supported locales
+	    ];
+	    var localeDirs = {
+	      general: 'locales',
+	      tagging: 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/translations'
+	    };
+	    var fileMap = _mainFileFetcher.fileMap();
 
-	      /**
-	       * Calculate the rmd160 of a raw string
-	       */
+	    for (var scopeId in localeDirs) {
+	      var key = "locales_index_".concat(scopeId);
 
-	      function rstr(s) {
-	        s = (utf8) ? utf8Encode(s) : s;
-	        return binl2rstr(binl(rstr2binl(s), s.length * 8));
+	      if (!fileMap[key]) {
+	        fileMap[key] = localeDirs[scopeId] + '/index.min.json';
 	      }
 
-	      /**
-	       * Calculate the HMAC-rmd160 of a key and some data (raw strings)
-	       */
-
-	      function rstr_hmac(key, data) {
-	        key = (utf8) ? utf8Encode(key) : key;
-	        data = (utf8) ? utf8Encode(data) : data;
-	        var i, hash,
-	          bkey = rstr2binl(key),
-	          ipad = Array(16),
-	          opad = Array(16);
+	      filesToFetch.push(key);
+	    }
 
-	        if (bkey.length > 16) {
-	          bkey = binl(bkey, key.length * 8);
-	        }
+	    return _loadPromise = Promise.all(filesToFetch.map(function (key) {
+	      return _mainFileFetcher.get(key);
+	    })).then(function (results) {
+	      _dataLanguages = results[0];
+	      _dataLocales = results[1];
+	      var indexes = results.slice(2);
 
-	        for (i = 0; i < 16; i += 1) {
-	          ipad[i] = bkey[i] ^ 0x36363636;
-	          opad[i] = bkey[i] ^ 0x5C5C5C5C;
-	        }
-	        hash = binl(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
-	        return binl2rstr(binl(opad.concat(hash), 512 + 160));
-	      }
+	      var requestedLocales = (_preferredLocaleCodes || []).concat(utilDetect().browserLocales) // List of locales preferred by the browser in priority order.
+	      .concat(['en']); // fallback to English since it's the only guaranteed complete language
 
-	      /**
-	       * Convert an array of little-endian words to a string
-	       */
 
-	      function binl2rstr(input) {
-	        var i, output = '',
-	          l = input.length * 32;
-	        for (i = 0; i < l; i += 8) {
-	          output += String.fromCharCode((input[i >> 5] >>> (i % 32)) & 0xFF);
-	        }
-	        return output;
-	      }
+	      _localeCodes = localesToUseFrom(requestedLocales);
+	      _localeCode = _localeCodes[0]; // Run iD in the highest-priority locale; the rest are fallbacks
 
-	      /**
-	       * Calculate the RIPE-MD160 of an array of little-endian words, and a bit length.
-	       */
+	      var loadStringsPromises = [];
+	      indexes.forEach(function (index, i) {
+	        // Will always return the index for `en` if nothing else
+	        var fullCoverageIndex = _localeCodes.findIndex(function (locale) {
+	          return index[locale] && index[locale].pct === 1;
+	        }); // We only need to load locales up until we find one with full coverage
 
-	      function binl(x, len) {
-	        var T, j, i, l,
-	          h0 = 0x67452301,
-	          h1 = 0xefcdab89,
-	          h2 = 0x98badcfe,
-	          h3 = 0x10325476,
-	          h4 = 0xc3d2e1f0,
-	          A1, B1, C1, D1, E1,
-	          A2, B2, C2, D2, E2;
-
-	        /* append padding */
-	        x[len >> 5] |= 0x80 << (len % 32);
-	        x[(((len + 64) >>> 9) << 4) + 14] = len;
-	        l = x.length;
-
-	        for (i = 0; i < l; i += 16) {
-	          A1 = A2 = h0;
-	          B1 = B2 = h1;
-	          C1 = C2 = h2;
-	          D1 = D2 = h3;
-	          E1 = E2 = h4;
-	          for (j = 0; j <= 79; j += 1) {
-	            T = safe_add(A1, rmd160_f(j, B1, C1, D1));
-	            T = safe_add(T, x[i + rmd160_r1[j]]);
-	            T = safe_add(T, rmd160_K1(j));
-	            T = safe_add(bit_rol(T, rmd160_s1[j]), E1);
-	            A1 = E1;
-	            E1 = D1;
-	            D1 = bit_rol(C1, 10);
-	            C1 = B1;
-	            B1 = T;
-	            T = safe_add(A2, rmd160_f(79 - j, B2, C2, D2));
-	            T = safe_add(T, x[i + rmd160_r2[j]]);
-	            T = safe_add(T, rmd160_K2(j));
-	            T = safe_add(bit_rol(T, rmd160_s2[j]), E2);
-	            A2 = E2;
-	            E2 = D2;
-	            D2 = bit_rol(C2, 10);
-	            C2 = B2;
-	            B2 = T;
-	          }
 
-	          T = safe_add(h1, safe_add(C1, D2));
-	          h1 = safe_add(h2, safe_add(D1, E2));
-	          h2 = safe_add(h3, safe_add(E1, A2));
-	          h3 = safe_add(h4, safe_add(A1, B2));
-	          h4 = safe_add(h0, safe_add(B1, C2));
-	          h0 = T;
-	        }
-	        return [h0, h1, h2, h3, h4];
+	        _localeCodes.slice(0, fullCoverageIndex + 1).forEach(function (code) {
+	          var scopeId = Object.keys(localeDirs)[i];
+	          var directory = Object.values(localeDirs)[i];
+	          if (index[code]) loadStringsPromises.push(localizer.loadLocale(code, scopeId, directory));
+	        });
+	      });
+	      return Promise.all(loadStringsPromises);
+	    }).then(function () {
+	      updateForCurrentLocale();
+	    })["catch"](function (err) {
+	      return console.error(err);
+	    }); // eslint-disable-line
+	  }; // Returns the locales from `requestedLocales` supported by iD that we should use
+
+
+	  function localesToUseFrom(requestedLocales) {
+	    var supportedLocales = _dataLocales;
+	    var toUse = [];
+
+	    for (var i in requestedLocales) {
+	      var locale = requestedLocales[i];
+	      if (supportedLocales[locale]) toUse.push(locale);
+
+	      if (locale.includes('-')) {
+	        // Full locale ('es-ES'), add fallback to the base ('es')
+	        var langPart = locale.split('-')[0];
+	        if (supportedLocales[langPart]) toUse.push(langPart);
 	      }
+	    } // remove duplicates
 
-	      // specific algorithm methods
 
-	      function rmd160_f(j, x, y, z) {
-	        return (0 <= j && j <= 15) ? (x ^ y ^ z) :
-	          (16 <= j && j <= 31) ? (x & y) | (~x & z) :
-	          (32 <= j && j <= 47) ? (x | ~y) ^ z :
-	          (48 <= j && j <= 63) ? (x & z) | (y & ~z) :
-	          (64 <= j && j <= 79) ? x ^ (y | ~z) :
-	          'rmd160_f: j out of range';
-	      }
+	    return utilArrayUniq(toUse);
+	  }
 
-	      function rmd160_K1(j) {
-	        return (0 <= j && j <= 15) ? 0x00000000 :
-	          (16 <= j && j <= 31) ? 0x5a827999 :
-	          (32 <= j && j <= 47) ? 0x6ed9eba1 :
-	          (48 <= j && j <= 63) ? 0x8f1bbcdc :
-	          (64 <= j && j <= 79) ? 0xa953fd4e :
-	          'rmd160_K1: j out of range';
-	      }
+	  function updateForCurrentLocale() {
+	    if (!_localeCode) return;
+	    _languageCode = _localeCode.split('-')[0];
+	    var currentData = _dataLocales[_localeCode] || _dataLocales[_languageCode];
+	    var hash = utilStringQs(window.location.hash);
 
-	      function rmd160_K2(j) {
-	        return (0 <= j && j <= 15) ? 0x50a28be6 :
-	          (16 <= j && j <= 31) ? 0x5c4dd124 :
-	          (32 <= j && j <= 47) ? 0x6d703ef3 :
-	          (48 <= j && j <= 63) ? 0x7a6d76e9 :
-	          (64 <= j && j <= 79) ? 0x00000000 :
-	          'rmd160_K2: j out of range';
-	      }
+	    if (hash.rtl === 'true') {
+	      _textDirection = 'rtl';
+	    } else if (hash.rtl === 'false') {
+	      _textDirection = 'ltr';
+	    } else {
+	      _textDirection = currentData && currentData.rtl ? 'rtl' : 'ltr';
 	    }
-	  };
 
-	  // exposes Hashes
-	  (function(window, undefined$1) {
-	    var freeExports = false;
-	    {
-	      freeExports = exports;
-	      if (exports && typeof commonjsGlobal === 'object' && commonjsGlobal && commonjsGlobal === commonjsGlobal.global) {
-	        window = commonjsGlobal;
-	      }
+	    var locale = _localeCode;
+	    if (locale.toLowerCase() === 'en-us') locale = 'en';
+	    _languageNames = _localeStrings.general[locale].languageNames;
+	    _scriptNames = _localeStrings.general[locale].scriptNames;
+	    _usesMetric = _localeCode.slice(-3).toLowerCase() !== '-us';
+	  }
+	  /* Locales */
+	  // Returns a Promise to load the strings for the requested locale
+
+
+	  localizer.loadLocale = function (locale, scopeId, directory) {
+	    // US English is the default
+	    if (locale.toLowerCase() === 'en-us') locale = 'en';
+
+	    if (_localeStrings[scopeId] && _localeStrings[scopeId][locale]) {
+	      // already loaded
+	      return Promise.resolve(locale);
 	    }
 
-	    if (typeof undefined$1 === 'function' && typeof undefined$1.amd === 'object' && undefined$1.amd) {
-	      // define as an anonymous module, so, through path mapping, it can be aliased
-	      undefined$1(function() {
-	        return Hashes;
-	      });
-	    } else if (freeExports) {
-	      // in Node.js or RingoJS v0.8.0+
-	      if ( module && module.exports === freeExports) {
-	        module.exports = Hashes;
-	      }
-	      // in Narwhal or RingoJS v0.7.0-
-	      else {
-	        freeExports.Hashes = Hashes;
-	      }
-	    } else {
-	      // in a browser or Rhino
-	      window.Hashes = Hashes;
+	    var fileMap = _mainFileFetcher.fileMap();
+	    var key = "locale_".concat(scopeId, "_").concat(locale);
+
+	    if (!fileMap[key]) {
+	      fileMap[key] = "".concat(directory, "/").concat(locale, ".min.json");
 	    }
-	  }(this));
-	}()); // IIFE
-	});
 
-	var immutable = extend$2;
+	    return _mainFileFetcher.get(key).then(function (d) {
+	      if (!_localeStrings[scopeId]) _localeStrings[scopeId] = {};
+	      _localeStrings[scopeId][locale] = d[locale];
+	      return locale;
+	    });
+	  };
+
+	  localizer.pluralRule = function (number) {
+	    return pluralRule(number, _localeCode);
+	  }; // Returns the plural rule for the given `number` with the given `localeCode`.
+	  // One of: `zero`, `one`, `two`, `few`, `many`, `other`
 
-	var hasOwnProperty$3 = Object.prototype.hasOwnProperty;
 
-	function extend$2() {
-	    var arguments$1 = arguments;
+	  function pluralRule(number, localeCode) {
+	    // modern browsers have this functionality built-in
+	    var rules = 'Intl' in window && Intl.PluralRules && new Intl.PluralRules(localeCode);
 
-	    var target = {};
+	    if (rules) {
+	      return rules.select(number);
+	    } // fallback to basic one/other, as in English
 
-	    for (var i = 0; i < arguments.length; i++) {
-	        var source = arguments$1[i];
 
-	        for (var key in source) {
-	            if (hasOwnProperty$3.call(source, key)) {
-	                target[key] = source[key];
-	            }
-	        }
+	    if (number === 1) return 'one';
+	    return 'other';
+	  }
+	  /**
+	  * Try to find that string in `locale` or the current `_localeCode` matching
+	  * the given `stringId`. If no string can be found in the requested locale,
+	  * we'll recurse down all the `_localeCodes` until one is found.
+	  *
+	  * @param  {string}   stringId      string identifier
+	  * @param  {object?}  replacements  token replacements and default string
+	  * @param  {string?}  locale        locale to use (defaults to currentLocale)
+	  * @return {string?}  localized string
+	  */
+
+
+	  localizer.tInfo = function (origStringId, replacements, locale) {
+	    var stringId = origStringId.trim();
+	    var scopeId = 'general';
+
+	    if (stringId[0] === '_') {
+	      var split = stringId.split('.');
+	      scopeId = split[0].slice(1);
+	      stringId = split.slice(1).join('.');
 	    }
 
-	    return target
-	}
+	    locale = locale || _localeCode;
+	    var path = stringId.split('.').map(function (s) {
+	      return s.replace(/<TX_DOT>/g, '.');
+	    }).reverse();
+	    var stringsKey = locale; // US English is the default
 
-	var sha1 = new hashes.SHA1();
+	    if (stringsKey.toLowerCase() === 'en-us') stringsKey = 'en';
+	    var result = _localeStrings && _localeStrings[scopeId] && _localeStrings[scopeId][stringsKey];
 
-	var ohauth = {};
+	    while (result !== undefined && path.length) {
+	      result = result[path.pop()];
+	    }
 
-	ohauth.qsString = function(obj) {
-	    return Object.keys(obj).sort().map(function(key) {
-	        return ohauth.percentEncode(key) + '=' +
-	            ohauth.percentEncode(obj[key]);
-	    }).join('&');
-	};
+	    if (result !== undefined) {
+	      if (replacements) {
+	        if (_typeof(result) === 'object' && Object.keys(result).length) {
+	          // If plural forms are provided, dig one level deeper based on the
+	          // first numeric token replacement provided.
+	          var number = Object.values(replacements).find(function (value) {
+	            return typeof value === 'number';
+	          });
 
-	ohauth.stringQs = function(str) {
-	    return str.split('&').filter(function (pair) {
-	        return pair !== '';
-	    }).reduce(function(obj, pair){
-	        var parts = pair.split('=');
-	        obj[decodeURIComponent(parts[0])] = (null === parts[1]) ?
-	            '' : decodeURIComponent(parts[1]);
-	        return obj;
-	    }, {});
-	};
+	          if (number !== undefined) {
+	            var rule = pluralRule(number, locale);
 
-	ohauth.rawxhr = function(method, url, data, headers, callback) {
-	    var xhr = new XMLHttpRequest(),
-	        twoHundred = /^20\d$/;
-	    xhr.onreadystatechange = function() {
-	        if (4 === xhr.readyState && 0 !== xhr.status) {
-	            if (twoHundred.test(xhr.status)) { callback(null, xhr); }
-	            else { return callback(xhr, null); }
+	            if (result[rule]) {
+	              result = result[rule];
+	            } else {
+	              // We're pretty sure this should be a plural but no string
+	              // could be found for the given rule. Just pick the first
+	              // string and hope it makes sense.
+	              result = Object.values(result)[0];
+	            }
+	          }
 	        }
-	    };
-	    xhr.onerror = function(e) { return callback(e, null); };
-	    xhr.open(method, url, true);
-	    for (var h in headers) { xhr.setRequestHeader(h, headers[h]); }
-	    xhr.send(data);
-	    return xhr;
-	};
 
-	ohauth.xhr = function(method, url, auth, data, options, callback) {
-	    var headers = (options && options.header) || {
-	        'Content-Type': 'application/x-www-form-urlencoded'
-	    };
-	    headers.Authorization = 'OAuth ' + ohauth.authHeader(auth);
-	    return ohauth.rawxhr(method, url, data, headers, callback);
-	};
+	        if (typeof result === 'string') {
+	          for (var key in replacements) {
+	            var value = replacements[key];
 
-	ohauth.nonce = function() {
-	    for (var o = ''; o.length < 6;) {
-	        o += '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz'[Math.floor(Math.random() * 61)];
-	    }
-	    return o;
-	};
+	            if (typeof value === 'number') {
+	              if (value.toLocaleString) {
+	                // format numbers for the locale
+	                value = value.toLocaleString(locale, {
+	                  style: 'decimal',
+	                  useGrouping: true,
+	                  minimumFractionDigits: 0
+	                });
+	              } else {
+	                value = value.toString();
+	              }
+	            }
 
-	ohauth.authHeader = function(obj) {
-	    return Object.keys(obj).sort().map(function(key) {
-	        return encodeURIComponent(key) + '="' + encodeURIComponent(obj[key]) + '"';
-	    }).join(', ');
-	};
+	            var token = "{".concat(key, "}");
+	            var regex = new RegExp(token, 'g');
+	            result = result.replace(regex, value);
+	          }
+	        }
+	      }
 
-	ohauth.timestamp = function() { return ~~((+new Date()) / 1000); };
+	      if (typeof result === 'string') {
+	        // found a localized string!
+	        return {
+	          text: result,
+	          locale: locale
+	        };
+	      }
+	    } // no localized string found...
+	    // attempt to fallback to a lower-priority language
 
-	ohauth.percentEncode = function(s) {
-	    return encodeURIComponent(s)
-	        .replace(/\!/g, '%21').replace(/\'/g, '%27')
-	        .replace(/\*/g, '%2A').replace(/\(/g, '%28').replace(/\)/g, '%29');
-	};
 
-	ohauth.baseString = function(method, url, params) {
-	    if (params.oauth_signature) { delete params.oauth_signature; }
-	    return [
-	        method,
-	        ohauth.percentEncode(url),
-	        ohauth.percentEncode(ohauth.qsString(params))].join('&');
-	};
+	    var index = _localeCodes.indexOf(locale);
 
-	ohauth.signature = function(oauth_secret, token_secret, baseString) {
-	    return sha1.b64_hmac(
-	        ohauth.percentEncode(oauth_secret) + '&' +
-	        ohauth.percentEncode(token_secret),
-	        baseString);
-	};
+	    if (index >= 0 && index < _localeCodes.length - 1) {
+	      // eventually this will be 'en' or another locale with 100% coverage
+	      var fallback = _localeCodes[index + 1];
+	      return localizer.tInfo(origStringId, replacements, fallback);
+	    }
 
-	/**
-	 * Takes an options object for configuration (consumer_key,
-	 * consumer_secret, version, signature_method, token, token_secret)
-	 * and returns a function that generates the Authorization header
-	 * for given data.
-	 *
-	 * The returned function takes these parameters:
-	 * - method: GET/POST/...
-	 * - uri: full URI with protocol, port, path and query string
-	 * - extra_params: any extra parameters (that are passed in the POST data),
-	 *   can be an object or a from-urlencoded string.
-	 *
-	 * Returned function returns full OAuth header with "OAuth" string in it.
-	 */
+	    if (replacements && 'default' in replacements) {
+	      // Fallback to a default value if one is specified in `replacements`
+	      return {
+	        text: replacements["default"],
+	        locale: null
+	      };
+	    }
 
-	ohauth.headerGenerator = function(options) {
-	    options = options || {};
-	    var consumer_key = options.consumer_key || '',
-	        consumer_secret = options.consumer_secret || '',
-	        signature_method = options.signature_method || 'HMAC-SHA1',
-	        version = options.version || '1.0',
-	        token = options.token || '',
-	        token_secret = options.token_secret || '';
+	    var missing = "Missing ".concat(locale, " translation: ").concat(origStringId);
+	    if (typeof console !== 'undefined') console.error(missing); // eslint-disable-line
 
-	    return function(method, uri, extra_params) {
-	        method = method.toUpperCase();
-	        if (typeof extra_params === 'string' && extra_params.length > 0) {
-	            extra_params = ohauth.stringQs(extra_params);
-	        }
+	    return {
+	      text: missing,
+	      locale: 'en'
+	    };
+	  };
 
-	        var uri_parts = uri.split('?', 2),
-	        base_uri = uri_parts[0];
+	  localizer.hasTextForStringId = function (stringId) {
+	    return !!localizer.tInfo(stringId, {
+	      "default": 'nothing found'
+	    }).locale;
+	  }; // Returns only the localized text, discarding the locale info
 
-	        var query_params = uri_parts.length === 2 ?
-	            ohauth.stringQs(uri_parts[1]) : {};
 
-	        var oauth_params = {
-	            oauth_consumer_key: consumer_key,
-	            oauth_signature_method: signature_method,
-	            oauth_version: version,
-	            oauth_timestamp: ohauth.timestamp(),
-	            oauth_nonce: ohauth.nonce()
-	        };
+	  localizer.t = function (stringId, replacements, locale) {
+	    return localizer.tInfo(stringId, replacements, locale).text;
+	  }; // Returns the localized text wrapped in an HTML element encoding the locale info
 
-	        if (token) { oauth_params.oauth_token = token; }
 
-	        var all_params = immutable({}, oauth_params, query_params, extra_params),
-	            base_str = ohauth.baseString(method, base_uri, all_params);
+	  localizer.t.html = function (stringId, replacements, locale) {
+	    var info = localizer.tInfo(stringId, replacements, locale); // text may be empty or undefined if `replacements.default` is
 
-	        oauth_params.oauth_signature = ohauth.signature(consumer_secret, token_secret, base_str);
+	    return info.text ? localizer.htmlForLocalizedText(info.text, info.locale) : '';
+	  };
 
-	        return 'OAuth ' + ohauth.authHeader(oauth_params);
-	    };
-	};
+	  localizer.htmlForLocalizedText = function (text, localeCode) {
+	    return "<span class=\"localized-text\" lang=\"".concat(localeCode || 'unknown', "\">").concat(text, "</span>");
+	  };
 
-	var ohauth_1 = ohauth;
+	  localizer.languageName = function (code, options) {
+	    if (_languageNames[code]) {
+	      // name in locale language
+	      // e.g. "German"
+	      return _languageNames[code];
+	    } // sometimes we only want the local name
 
-	var resolveUrl$1 = createCommonjsModule(function (module, exports) {
-	// Copyright 2014 Simon Lydell
-	// X11 (“MIT”) Licensed. (See LICENSE.)
 
-	void (function(root, factory) {
-	  {
-	    module.exports = factory();
-	  }
-	}(commonjsGlobal, function() {
+	    if (options && options.localOnly) return null;
+	    var langInfo = _dataLanguages[code];
 
-	  function resolveUrl(/* ...urls */) {
-	    var arguments$1 = arguments;
+	    if (langInfo) {
+	      if (langInfo.nativeName) {
+	        // name in native language
+	        // e.g. "Deutsch (de)"
+	        return localizer.t('translate.language_and_code', {
+	          language: langInfo.nativeName,
+	          code: code
+	        });
+	      } else if (langInfo.base && langInfo.script) {
+	        var base = langInfo.base; // the code of the language this is based on
 
-	    var numUrls = arguments.length;
+	        if (_languageNames[base]) {
+	          // base language name in locale language
+	          var scriptCode = langInfo.script;
+	          var script = _scriptNames[scriptCode] || scriptCode; // e.g. "Serbian (Cyrillic)"
 
-	    if (numUrls === 0) {
-	      throw new Error("resolveUrl requires at least one argument; got none.")
+	          return localizer.t('translate.language_and_code', {
+	            language: _languageNames[base],
+	            code: script
+	          });
+	        } else if (_dataLanguages[base] && _dataLanguages[base].nativeName) {
+	          // e.g. "српски (sr-Cyrl)"
+	          return localizer.t('translate.language_and_code', {
+	            language: _dataLanguages[base].nativeName,
+	            code: code
+	          });
+	        }
+	      }
 	    }
 
-	    var base = document.createElement("base");
-	    base.href = arguments[0];
+	    return code; // if not found, use the code
+	  };
 
-	    if (numUrls === 1) {
-	      return base.href
-	    }
+	  return localizer;
+	}
 
-	    var head = document.getElementsByTagName("head")[0];
-	    head.insertBefore(base, head.firstChild);
+	// `presetCollection` is a wrapper around an `Array` of presets `collection`,
+	// and decorated with some extra methods for searching and matching geometry
+	//
 
-	    var a = document.createElement("a");
-	    var resolved;
+	function presetCollection(collection) {
+	  var MAXRESULTS = 50;
+	  var _this = {};
+	  var _memo = {};
+	  _this.collection = collection;
 
-	    for (var index = 1; index < numUrls; index++) {
-	      a.href = arguments$1[index];
-	      resolved = a.href;
-	      base.href = resolved;
-	    }
+	  _this.item = function (id) {
+	    if (_memo[id]) return _memo[id];
 
-	    head.removeChild(base);
+	    var found = _this.collection.find(function (d) {
+	      return d.id === id;
+	    });
 
-	    return resolved
-	  }
+	    if (found) _memo[id] = found;
+	    return found;
+	  };
 
-	  return resolveUrl
+	  _this.index = function (id) {
+	    return _this.collection.findIndex(function (d) {
+	      return d.id === id;
+	    });
+	  };
 
-	}));
-	});
+	  _this.matchGeometry = function (geometry) {
+	    return presetCollection(_this.collection.filter(function (d) {
+	      return d.matchGeometry(geometry);
+	    }));
+	  };
 
-	var assign$1 = make_assign();
-	var create$8 = make_create();
-	var trim = make_trim();
-	var Global = (typeof window !== 'undefined' ? window : commonjsGlobal);
-
-	var util = {
-		assign: assign$1,
-		create: create$8,
-		trim: trim,
-		bind: bind$3,
-		slice: slice$5,
-		each: each,
-		map: map$5,
-		pluck: pluck,
-		isList: isList,
-		isFunction: isFunction$2,
-		isObject: isObject$2,
-		Global: Global
-	};
+	  _this.matchAllGeometry = function (geometries) {
+	    return presetCollection(_this.collection.filter(function (d) {
+	      return d && d.matchAllGeometry(geometries);
+	    }));
+	  };
 
-	function make_assign() {
-		if (Object.assign) {
-			return Object.assign
-		} else {
-			return function shimAssign(obj, props1, props2, etc) {
-				var arguments$1 = arguments;
-
-				for (var i = 1; i < arguments.length; i++) {
-					each(Object(arguments$1[i]), function(val, key) {
-						obj[key] = val;
-					});
-				}			
-				return obj
-			}
-		}
-	}
+	  _this.matchAnyGeometry = function (geometries) {
+	    return presetCollection(_this.collection.filter(function (d) {
+	      return geometries.some(function (geom) {
+	        return d.matchGeometry(geom);
+	      });
+	    }));
+	  };
 
-	function make_create() {
-		if (Object.create) {
-			return function create(obj, assignProps1, assignProps2, etc) {
-				var assignArgsList = slice$5(arguments, 1);
-				return assign$1.apply(this, [Object.create(obj)].concat(assignArgsList))
-			}
-		} else {
-			function F() {} // eslint-disable-line no-inner-declarations
-			return function create(obj, assignProps1, assignProps2, etc) {
-				var assignArgsList = slice$5(arguments, 1);
-				F.prototype = obj;
-				return assign$1.apply(this, [new F()].concat(assignArgsList))
-			}
-		}
-	}
+	  _this.fallback = function (geometry) {
+	    var id = geometry;
+	    if (id === 'vertex') id = 'point';
+	    return _this.item(id);
+	  };
 
-	function make_trim() {
-		if (String.prototype.trim) {
-			return function trim(str) {
-				return String.prototype.trim.call(str)
-			}
-		} else {
-			return function trim(str) {
-				return str.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, '')
-			}
-		}
-	}
+	  _this.search = function (value, geometry, loc) {
+	    if (!value) return _this; // don't remove diacritical characters since we're assuming the user is being intentional
 
-	function bind$3(obj, fn) {
-		return function() {
-			return fn.apply(obj, Array.prototype.slice.call(arguments, 0))
-		}
-	}
+	    value = value.toLowerCase().trim(); // match at name beginning or just after a space (e.g. "office" -> match "Law Office")
 
-	function slice$5(arr, index) {
-		return Array.prototype.slice.call(arr, index || 0)
-	}
+	    function leading(a) {
+	      var index = a.indexOf(value);
+	      return index === 0 || a[index - 1] === ' ';
+	    } // match at name beginning only
 
-	function each(obj, fn) {
-		pluck(obj, function(val, key) {
-			fn(val, key);
-			return false
-		});
-	}
 
-	function map$5(obj, fn) {
-		var res = (isList(obj) ? [] : {});
-		pluck(obj, function(v, k) {
-			res[k] = fn(v, k);
-			return false
-		});
-		return res
-	}
+	    function leadingStrict(a) {
+	      var index = a.indexOf(value);
+	      return index === 0;
+	    }
 
-	function pluck(obj, fn) {
-		if (isList(obj)) {
-			for (var i=0; i<obj.length; i++) {
-				if (fn(obj[i], i)) {
-					return obj[i]
-				}
-			}
-		} else {
-			for (var key in obj) {
-				if (obj.hasOwnProperty(key)) {
-					if (fn(obj[key], key)) {
-						return obj[key]
-					}
-				}
-			}
-		}
-	}
+	    function sortPresets(nameProp) {
+	      return function sortNames(a, b) {
+	        var aCompare = a[nameProp]();
+	        var bCompare = b[nameProp](); // priority if search string matches preset name exactly - #4325
 
-	function isList(val) {
-		return (val != null && typeof val != 'function' && typeof val.length == 'number')
-	}
+	        if (value === aCompare) return -1;
+	        if (value === bCompare) return 1; // priority for higher matchScore
 
-	function isFunction$2(val) {
-		return val && {}.toString.call(val) === '[object Function]'
-	}
+	        var i = b.originalScore - a.originalScore;
+	        if (i !== 0) return i; // priority if search string appears earlier in preset name
 
-	function isObject$2(val) {
-		return val && {}.toString.call(val) === '[object Object]'
-	}
+	        i = aCompare.indexOf(value) - bCompare.indexOf(value);
+	        if (i !== 0) return i; // priority for shorter preset names
 
-	var slice$6 = util.slice;
-	var pluck$1 = util.pluck;
-	var each$1 = util.each;
-	var bind$4 = util.bind;
-	var create$9 = util.create;
-	var isList$1 = util.isList;
-	var isFunction$3 = util.isFunction;
-	var isObject$3 = util.isObject;
+	        return aCompare.length - bCompare.length;
+	      };
+	    }
 
-	var storeEngine = {
-		createStore: createStore
-	};
+	    var pool = _this.collection;
 
-	var storeAPI = {
-		version: '2.0.12',
-		enabled: false,
-		
-		// get returns the value of the given key. If that value
-		// is undefined, it returns optionalDefaultValue instead.
-		get: function(key, optionalDefaultValue) {
-			var data = this.storage.read(this._namespacePrefix + key);
-			return this._deserialize(data, optionalDefaultValue)
-		},
-
-		// set will store the given value at key and returns value.
-		// Calling set with value === undefined is equivalent to calling remove.
-		set: function(key, value) {
-			if (value === undefined) {
-				return this.remove(key)
-			}
-			this.storage.write(this._namespacePrefix + key, this._serialize(value));
-			return value
-		},
-
-		// remove deletes the key and value stored at the given key.
-		remove: function(key) {
-			this.storage.remove(this._namespacePrefix + key);
-		},
-
-		// each will call the given callback once for each key-value pair
-		// in this store.
-		each: function(callback) {
-			var self = this;
-			this.storage.each(function(val, namespacedKey) {
-				callback.call(self, self._deserialize(val), (namespacedKey || '').replace(self._namespaceRegexp, ''));
-			});
-		},
-
-		// clearAll will remove all the stored key-value pairs in this store.
-		clearAll: function() {
-			this.storage.clearAll();
-		},
-
-		// additional functionality that can't live in plugins
-		// ---------------------------------------------------
-
-		// hasNamespace returns true if this store instance has the given namespace.
-		hasNamespace: function(namespace) {
-			return (this._namespacePrefix == '__storejs_'+namespace+'_')
-		},
-
-		// createStore creates a store.js instance with the first
-		// functioning storage in the list of storage candidates,
-		// and applies the the given mixins to the instance.
-		createStore: function() {
-			return createStore.apply(this, arguments)
-		},
-		
-		addPlugin: function(plugin) {
-			this._addPlugin(plugin);
-		},
-		
-		namespace: function(namespace) {
-			return createStore(this.storage, this.plugins, namespace)
-		}
-	};
+	    if (Array.isArray(loc)) {
+	      var validLocations = _mainLocations.locationsAt(loc);
+	      pool = pool.filter(function (a) {
+	        return !a.locationSetID || validLocations[a.locationSetID];
+	      });
+	    }
 
-	function _warn() {
-		var _console = (typeof console == 'undefined' ? null : console);
-		if (!_console) { return }
-		var fn = (_console.warn ? _console.warn : _console.log);
-		fn.apply(_console, arguments);
-	}
-
-	function createStore(storages, plugins, namespace) {
-		if (!namespace) {
-			namespace = '';
-		}
-		if (storages && !isList$1(storages)) {
-			storages = [storages];
-		}
-		if (plugins && !isList$1(plugins)) {
-			plugins = [plugins];
-		}
-
-		var namespacePrefix = (namespace ? '__storejs_'+namespace+'_' : '');
-		var namespaceRegexp = (namespace ? new RegExp('^'+namespacePrefix) : null);
-		var legalNamespaces = /^[a-zA-Z0-9_\-]*$/; // alpha-numeric + underscore and dash
-		if (!legalNamespaces.test(namespace)) {
-			throw new Error('store.js namespaces can only have alphanumerics + underscores and dashes')
-		}
-		
-		var _privateStoreProps = {
-			_namespacePrefix: namespacePrefix,
-			_namespaceRegexp: namespaceRegexp,
-
-			_testStorage: function(storage) {
-				try {
-					var testStr = '__storejs__test__';
-					storage.write(testStr, testStr);
-					var ok = (storage.read(testStr) === testStr);
-					storage.remove(testStr);
-					return ok
-				} catch(e) {
-					return false
-				}
-			},
-
-			_assignPluginFnProp: function(pluginFnProp, propName) {
-				var oldFn = this[propName];
-				this[propName] = function pluginFn() {
-					var args = slice$6(arguments, 0);
-					var self = this;
-
-					// super_fn calls the old function which was overwritten by
-					// this mixin.
-					function super_fn() {
-						if (!oldFn) { return }
-						each$1(arguments, function(arg, i) {
-							args[i] = arg;
-						});
-						return oldFn.apply(self, args)
-					}
-
-					// Give mixing function access to super_fn by prefixing all mixin function
-					// arguments with super_fn.
-					var newFnArgs = [super_fn].concat(args);
-
-					return pluginFnProp.apply(self, newFnArgs)
-				};
-			},
-
-			_serialize: function(obj) {
-				return JSON.stringify(obj)
-			},
-
-			_deserialize: function(strVal, defaultVal) {
-				if (!strVal) { return defaultVal }
-				// It is possible that a raw string value has been previously stored
-				// in a storage without using store.js, meaning it will be a raw
-				// string value instead of a JSON serialized string. By defaulting
-				// to the raw string value in case of a JSON parse error, we allow
-				// for past stored values to be forwards-compatible with store.js
-				var val = '';
-				try { val = JSON.parse(strVal); }
-				catch(e) { val = strVal; }
-
-				return (val !== undefined ? val : defaultVal)
-			},
-			
-			_addStorage: function(storage) {
-				if (this.enabled) { return }
-				if (this._testStorage(storage)) {
-					this.storage = storage;
-					this.enabled = true;
-				}
-			},
-
-			_addPlugin: function(plugin) {
-				var self = this;
-
-				// If the plugin is an array, then add all plugins in the array.
-				// This allows for a plugin to depend on other plugins.
-				if (isList$1(plugin)) {
-					each$1(plugin, function(plugin) {
-						self._addPlugin(plugin);
-					});
-					return
-				}
-
-				// Keep track of all plugins we've seen so far, so that we
-				// don't add any of them twice.
-				var seenPlugin = pluck$1(this.plugins, function(seenPlugin) {
-					return (plugin === seenPlugin)
-				});
-				if (seenPlugin) {
-					return
-				}
-				this.plugins.push(plugin);
-
-				// Check that the plugin is properly formed
-				if (!isFunction$3(plugin)) {
-					throw new Error('Plugins must be function values that return objects')
-				}
-
-				var pluginProperties = plugin.call(this);
-				if (!isObject$3(pluginProperties)) {
-					throw new Error('Plugins must return an object of function properties')
-				}
-
-				// Add the plugin function properties to this store instance.
-				each$1(pluginProperties, function(pluginFnProp, propName) {
-					if (!isFunction$3(pluginFnProp)) {
-						throw new Error('Bad plugin property: '+propName+' from plugin '+plugin.name+'. Plugins should only return functions.')
-					}
-					self._assignPluginFnProp(pluginFnProp, propName);
-				});
-			},
-			
-			// Put deprecated properties in the private API, so as to not expose it to accidential
-			// discovery through inspection of the store object.
-			
-			// Deprecated: addStorage
-			addStorage: function(storage) {
-				_warn('store.addStorage(storage) is deprecated. Use createStore([storages])');
-				this._addStorage(storage);
-			}
-		};
-
-		var store = create$9(_privateStoreProps, storeAPI, {
-			plugins: []
-		});
-		store.raw = {};
-		each$1(store, function(prop, propName) {
-			if (isFunction$3(prop)) {
-				store.raw[propName] = bind$4(store, prop);			
-			}
-		});
-		each$1(storages, function(storage) {
-			store._addStorage(storage);
-		});
-		each$1(plugins, function(plugin) {
-			store._addPlugin(plugin);
-		});
-		return store
-	}
-
-	var Global$1 = util.Global;
+	    var searchable = pool.filter(function (a) {
+	      return a.searchable !== false && a.suggestion !== true;
+	    });
+	    var suggestions = pool.filter(function (a) {
+	      return a.suggestion === true;
+	    }); // matches value to preset.name
+
+	    var leadingNames = searchable.filter(function (a) {
+	      return leading(a.searchName());
+	    }).sort(sortPresets('searchName')); // matches value to preset suggestion name
+
+	    var leadingSuggestions = suggestions.filter(function (a) {
+	      return leadingStrict(a.searchName());
+	    }).sort(sortPresets('searchName'));
+	    var leadingNamesStripped = searchable.filter(function (a) {
+	      return leading(a.searchNameStripped());
+	    }).sort(sortPresets('searchNameStripped'));
+	    var leadingSuggestionsStripped = suggestions.filter(function (a) {
+	      return leadingStrict(a.searchNameStripped());
+	    }).sort(sortPresets('searchNameStripped')); // matches value to preset.terms values
+
+	    var leadingTerms = searchable.filter(function (a) {
+	      return (a.terms() || []).some(leading);
+	    });
+	    var leadingSuggestionTerms = suggestions.filter(function (a) {
+	      return (a.terms() || []).some(leading);
+	    }); // matches value to preset.tags values
 
-	var localStorage_1 = {
-		name: 'localStorage',
-		read: read,
-		write: write,
-		each: each$2,
-		remove: remove$2,
-		clearAll: clearAll,
-	};
+	    var leadingTagValues = searchable.filter(function (a) {
+	      return Object.values(a.tags || {}).filter(function (val) {
+	        return val !== '*';
+	      }).some(leading);
+	    }); // finds close matches to value in preset.name
 
-	function localStorage$1() {
-		return Global$1.localStorage
-	}
+	    var similarName = searchable.map(function (a) {
+	      return {
+	        preset: a,
+	        dist: utilEditDistance(value, a.searchName())
+	      };
+	    }).filter(function (a) {
+	      return a.dist + Math.min(value.length - a.preset.searchName().length, 0) < 3;
+	    }).sort(function (a, b) {
+	      return a.dist - b.dist;
+	    }).map(function (a) {
+	      return a.preset;
+	    }); // finds close matches to value to preset suggestion name
+
+	    var similarSuggestions = suggestions.map(function (a) {
+	      return {
+	        preset: a,
+	        dist: utilEditDistance(value, a.searchName())
+	      };
+	    }).filter(function (a) {
+	      return a.dist + Math.min(value.length - a.preset.searchName().length, 0) < 1;
+	    }).sort(function (a, b) {
+	      return a.dist - b.dist;
+	    }).map(function (a) {
+	      return a.preset;
+	    }); // finds close matches to value in preset.terms
+
+	    var similarTerms = searchable.filter(function (a) {
+	      return (a.terms() || []).some(function (b) {
+	        return utilEditDistance(value, b) + Math.min(value.length - b.length, 0) < 3;
+	      });
+	    });
+	    var results = leadingNames.concat(leadingSuggestions, leadingNamesStripped, leadingSuggestionsStripped, leadingTerms, leadingSuggestionTerms, leadingTagValues, similarName, similarSuggestions, similarTerms).slice(0, MAXRESULTS - 1);
 
-	function read(key) {
-		return localStorage$1().getItem(key)
-	}
+	    if (geometry) {
+	      if (typeof geometry === 'string') {
+	        results.push(_this.fallback(geometry));
+	      } else {
+	        geometry.forEach(function (geom) {
+	          return results.push(_this.fallback(geom));
+	        });
+	      }
+	    }
 
-	function write(key, data) {
-		return localStorage$1().setItem(key, data)
-	}
+	    return presetCollection(utilArrayUniq(results));
+	  };
 
-	function each$2(fn) {
-		for (var i = localStorage$1().length - 1; i >= 0; i--) {
-			var key = localStorage$1().key(i);
-			fn(read(key), key);
-		}
+	  return _this;
 	}
 
-	function remove$2(key) {
-		return localStorage$1().removeItem(key)
-	}
+	// `presetCategory` builds a `presetCollection` of member presets,
+	// decorated with some extra methods for searching and matching geometry
+	//
 
-	function clearAll() {
-		return localStorage$1().clear()
-	}
+	function presetCategory(categoryID, category, allPresets) {
+	  var _this = Object.assign({}, category); // shallow copy
 
-	// oldFF-globalStorage provides storage for Firefox
-	// versions 6 and 7, where no localStorage, etc
-	// is available.
 
+	  var _searchName; // cache
 
-	var Global$2 = util.Global;
 
-	var oldFFGlobalStorage = {
-		name: 'oldFF-globalStorage',
-		read: read$1,
-		write: write$1,
-		each: each$3,
-		remove: remove$3,
-		clearAll: clearAll$1,
-	};
+	  var _searchNameStripped; // cache
 
-	var globalStorage = Global$2.globalStorage;
 
-	function read$1(key) {
-		return globalStorage[key]
-	}
+	  _this.id = categoryID;
+	  _this.members = presetCollection((category.members || []).map(function (presetID) {
+	    return allPresets[presetID];
+	  }).filter(Boolean));
+	  _this.geometry = _this.members.collection.reduce(function (acc, preset) {
+	    for (var i in preset.geometry) {
+	      var geometry = preset.geometry[i];
+
+	      if (acc.indexOf(geometry) === -1) {
+	        acc.push(geometry);
+	      }
+	    }
 
-	function write$1(key, data) {
-		globalStorage[key] = data;
-	}
+	    return acc;
+	  }, []);
 
-	function each$3(fn) {
-		for (var i = globalStorage.length - 1; i >= 0; i--) {
-			var key = globalStorage.key(i);
-			fn(globalStorage[key], key);
-		}
-	}
+	  _this.matchGeometry = function (geom) {
+	    return _this.geometry.indexOf(geom) >= 0;
+	  };
 
-	function remove$3(key) {
-		return globalStorage.removeItem(key)
-	}
+	  _this.matchAllGeometry = function (geometries) {
+	    return _this.members.collection.some(function (preset) {
+	      return preset.matchAllGeometry(geometries);
+	    });
+	  };
 
-	function clearAll$1() {
-		each$3(function(key, _) {
-			delete globalStorage[key];
-		});
-	}
+	  _this.matchScore = function () {
+	    return -1;
+	  };
 
-	// oldIE-userDataStorage provides storage for Internet Explorer
-	// versions 6 and 7, where no localStorage, sessionStorage, etc
-	// is available.
+	  _this.name = function () {
+	    return _t("_tagging.presets.categories.".concat(categoryID, ".name"), {
+	      'default': categoryID
+	    });
+	  };
 
+	  _this.nameLabel = function () {
+	    return _t.html("_tagging.presets.categories.".concat(categoryID, ".name"), {
+	      'default': categoryID
+	    });
+	  };
 
-	var Global$3 = util.Global;
+	  _this.terms = function () {
+	    return [];
+	  };
 
-	var oldIEUserDataStorage = {
-		name: 'oldIE-userDataStorage',
-		write: write$2,
-		read: read$2,
-		each: each$4,
-		remove: remove$4,
-		clearAll: clearAll$2,
-	};
+	  _this.searchName = function () {
+	    if (!_searchName) {
+	      _searchName = (_this.suggestion ? _this.originalName : _this.name()).toLowerCase();
+	    }
 
-	var storageName = 'storejs';
-	var doc = Global$3.document;
-	var _withStorageEl = _makeIEStorageElFunction();
-	var disable = (Global$3.navigator ? Global$3.navigator.userAgent : '').match(/ (MSIE 8|MSIE 9|MSIE 10)\./); // MSIE 9.x, MSIE 10.x
+	    return _searchName;
+	  };
 
-	function write$2(unfixedKey, data) {
-		if (disable) { return }
-		var fixedKey = fixKey(unfixedKey);
-		_withStorageEl(function(storageEl) {
-			storageEl.setAttribute(fixedKey, data);
-			storageEl.save(storageName);
-		});
-	}
+	  _this.searchNameStripped = function () {
+	    if (!_searchNameStripped) {
+	      _searchNameStripped = _this.searchName(); // split combined diacritical characters into their parts
 
-	function read$2(unfixedKey) {
-		if (disable) { return }
-		var fixedKey = fixKey(unfixedKey);
-		var res = null;
-		_withStorageEl(function(storageEl) {
-			res = storageEl.getAttribute(fixedKey);
-		});
-		return res
-	}
+	      if (_searchNameStripped.normalize) _searchNameStripped = _searchNameStripped.normalize('NFD'); // remove diacritics
 
-	function each$4(callback) {
-		_withStorageEl(function(storageEl) {
-			var attributes = storageEl.XMLDocument.documentElement.attributes;
-			for (var i=attributes.length-1; i>=0; i--) {
-				var attr = attributes[i];
-				callback(storageEl.getAttribute(attr.name), attr.name);
-			}
-		});
-	}
+	      _searchNameStripped = _searchNameStripped.replace(/[\u0300-\u036f]/g, '');
+	    }
 
-	function remove$4(unfixedKey) {
-		var fixedKey = fixKey(unfixedKey);
-		_withStorageEl(function(storageEl) {
-			storageEl.removeAttribute(fixedKey);
-			storageEl.save(storageName);
-		});
-	}
+	    return _searchNameStripped;
+	  };
 
-	function clearAll$2() {
-		_withStorageEl(function(storageEl) {
-			var attributes = storageEl.XMLDocument.documentElement.attributes;
-			storageEl.load(storageName);
-			for (var i=attributes.length-1; i>=0; i--) {
-				storageEl.removeAttribute(attributes[i].name);
-			}
-			storageEl.save(storageName);
-		});
+	  return _this;
 	}
 
-	// Helpers
-	//////////
+	// `presetField` decorates a given `field` Object
+	// with some extra methods for searching and matching geometry
+	//
 
-	// In IE7, keys cannot start with a digit or contain certain chars.
-	// See https://github.com/marcuswestin/store.js/issues/40
-	// See https://github.com/marcuswestin/store.js/issues/83
-	var forbiddenCharsRegex = new RegExp("[!\"#$%&'()*+,/\\\\:;<=>?@[\\]^`{|}~]", "g");
-	function fixKey(key) {
-		return key.replace(/^\d/, '___$&').replace(forbiddenCharsRegex, '___')
-	}
+	function presetField(fieldID, field) {
+	  var _this = Object.assign({}, field); // shallow copy
 
-	function _makeIEStorageElFunction() {
-		if (!doc || !doc.documentElement || !doc.documentElement.addBehavior) {
-			return null
-		}
-		var scriptTag = 'script',
-			storageOwner,
-			storageContainer,
-			storageEl;
-
-		// Since #userData storage applies only to specific paths, we need to
-		// somehow link our data to a specific path.  We choose /favicon.ico
-		// as a pretty safe option, since all browsers already make a request to
-		// this URL anyway and being a 404 will not hurt us here.  We wrap an
-		// iframe pointing to the favicon in an ActiveXObject(htmlfile) object
-		// (see: http://msdn.microsoft.com/en-us/library/aa752574(v=VS.85).aspx)
-		// since the iframe access rules appear to allow direct access and
-		// manipulation of the document element, even for a 404 page.  This
-		// document can be used instead of the current document (which would
-		// have been limited to the current path) to perform #userData storage.
-		try {
-			/* global ActiveXObject */
-			storageContainer = new ActiveXObject('htmlfile');
-			storageContainer.open();
-			storageContainer.write('<'+scriptTag+'>document.w=window</'+scriptTag+'><iframe src="/favicon.ico"></iframe>');
-			storageContainer.close();
-			storageOwner = storageContainer.w.frames[0].document;
-			storageEl = storageOwner.createElement('div');
-		} catch(e) {
-			// somehow ActiveXObject instantiation failed (perhaps some special
-			// security settings or otherwse), fall back to per-path storage
-			storageEl = doc.createElement('div');
-			storageOwner = doc.body;
-		}
-
-		return function(storeFunction) {
-			var args = [].slice.call(arguments, 0);
-			args.unshift(storageEl);
-			// See http://msdn.microsoft.com/en-us/library/ms531081(v=VS.85).aspx
-			// and http://msdn.microsoft.com/en-us/library/ms531424(v=VS.85).aspx
-			storageOwner.appendChild(storageEl);
-			storageEl.addBehavior('#default#userData');
-			storageEl.load(storageName);
-			storeFunction.apply(this, args);
-			storageOwner.removeChild(storageEl);
-			return
-		}
-	}
-
-	// cookieStorage is useful Safari private browser mode, where localStorage
-	// doesn't work but cookies do. This implementation is adopted from
-	// https://developer.mozilla.org/en-US/docs/Web/API/Storage/LocalStorage
 
+	  _this.id = fieldID; // for use in classes, element ids, css selectors
 
-	var Global$4 = util.Global;
-	var trim$1 = util.trim;
+	  _this.safeid = utilSafeClassName(fieldID);
 
-	var cookieStorage = {
-		name: 'cookieStorage',
-		read: read$3,
-		write: write$3,
-		each: each$5,
-		remove: remove$5,
-		clearAll: clearAll$3,
-	};
+	  _this.matchGeometry = function (geom) {
+	    return !_this.geometry || _this.geometry.indexOf(geom) !== -1;
+	  };
 
-	var doc$1 = Global$4.document;
+	  _this.matchAllGeometry = function (geometries) {
+	    return !_this.geometry || geometries.every(function (geom) {
+	      return _this.geometry.indexOf(geom) !== -1;
+	    });
+	  };
 
-	function read$3(key) {
-		if (!key || !_has(key)) { return null }
-		var regexpStr = "(?:^|.*;\\s*)" +
-			escape(key).replace(/[\-\.\+\*]/g, "\\$&") +
-			"\\s*\\=\\s*((?:[^;](?!;))*[^;]?).*";
-		return unescape(doc$1.cookie.replace(new RegExp(regexpStr), "$1"))
-	}
+	  _this.t = function (scope, options) {
+	    return _t("_tagging.presets.fields.".concat(fieldID, ".").concat(scope), options);
+	  };
 
-	function each$5(callback) {
-		var cookies = doc$1.cookie.split(/; ?/g);
-		for (var i = cookies.length - 1; i >= 0; i--) {
-			if (!trim$1(cookies[i])) {
-				continue
-			}
-			var kvp = cookies[i].split('=');
-			var key = unescape(kvp[0]);
-			var val = unescape(kvp[1]);
-			callback(val, key);
-		}
-	}
+	  _this.t.html = function (scope, options) {
+	    return _t.html("_tagging.presets.fields.".concat(fieldID, ".").concat(scope), options);
+	  };
 
-	function write$3(key, data) {
-		if(!key) { return }
-		doc$1.cookie = escape(key) + "=" + escape(data) + "; expires=Tue, 19 Jan 2038 03:14:07 GMT; path=/";
-	}
+	  _this.hasTextForStringId = function (scope) {
+	    return _mainLocalizer.hasTextForStringId("_tagging.presets.fields.".concat(fieldID, ".").concat(scope));
+	  };
 
-	function remove$5(key) {
-		if (!key || !_has(key)) {
-			return
-		}
-		doc$1.cookie = escape(key) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/";
-	}
+	  _this.title = function () {
+	    return _this.overrideLabel || _this.t('label', {
+	      'default': fieldID
+	    });
+	  };
 
-	function clearAll$3() {
-		each$5(function(_, key) {
-			remove$5(key);
-		});
-	}
+	  _this.label = function () {
+	    return _this.overrideLabel || _this.t.html('label', {
+	      'default': fieldID
+	    });
+	  };
 
-	function _has(key) {
-		return (new RegExp("(?:^|;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=")).test(doc$1.cookie)
-	}
+	  var _placeholder = _this.placeholder;
 
-	var Global$5 = util.Global;
+	  _this.placeholder = function () {
+	    return _this.t('placeholder', {
+	      'default': _placeholder
+	    });
+	  };
 
-	var sessionStorage_1 = {
-		name: 'sessionStorage',
-		read: read$4,
-		write: write$4,
-		each: each$6,
-		remove: remove$6,
-		clearAll: clearAll$4
-	};
+	  _this.originalTerms = (_this.terms || []).join();
 
-	function sessionStorage() {
-		return Global$5.sessionStorage
-	}
+	  _this.terms = function () {
+	    return _this.t('terms', {
+	      'default': _this.originalTerms
+	    }).toLowerCase().trim().split(/\s*,+\s*/);
+	  };
 
-	function read$4(key) {
-		return sessionStorage().getItem(key)
+	  _this.increment = _this.type === 'number' ? _this.increment || 1 : undefined;
+	  return _this;
 	}
 
-	function write$4(key, data) {
-		return sessionStorage().setItem(key, data)
-	}
+	var $$8 = _export;
+	var lastIndexOf = arrayLastIndexOf;
 
-	function each$6(fn) {
-		for (var i = sessionStorage().length - 1; i >= 0; i--) {
-			var key = sessionStorage().key(i);
-			fn(read$4(key), key);
-		}
-	}
+	// `Array.prototype.lastIndexOf` method
+	// https://tc39.es/ecma262/#sec-array.prototype.lastindexof
+	// eslint-disable-next-line es/no-array-prototype-lastindexof -- required for testing
+	$$8({ target: 'Array', proto: true, forced: lastIndexOf !== [].lastIndexOf }, {
+	  lastIndexOf: lastIndexOf
+	});
 
-	function remove$6(key) {
-		return sessionStorage().removeItem(key)
-	}
+	// `presetPreset` decorates a given `preset` Object
+	// with some extra methods for searching and matching geometry
+	//
 
-	function clearAll$4() {
-		return sessionStorage().clear()
-	}
+	function presetPreset(presetID, preset, addable, allFields, allPresets) {
+	  allFields = allFields || {};
+	  allPresets = allPresets || {};
 
-	// memoryStorage is a useful last fallback to ensure that the store
-	// is functions (meaning store.get(), store.set(), etc will all function).
-	// However, stored values will not persist when the browser navigates to
-	// a new page or reloads the current page.
+	  var _this = Object.assign({}, preset); // shallow copy
 
-	var memoryStorage_1 = {
-		name: 'memoryStorage',
-		read: read$5,
-		write: write$5,
-		each: each$7,
-		remove: remove$7,
-		clearAll: clearAll$5,
-	};
 
-	var memoryStorage = {};
+	  var _addable = addable || false;
 
-	function read$5(key) {
-		return memoryStorage[key]
-	}
+	  var _resolvedFields; // cache
 
-	function write$5(key, data) {
-		memoryStorage[key] = data;
-	}
 
-	function each$7(callback) {
-		for (var key in memoryStorage) {
-			if (memoryStorage.hasOwnProperty(key)) {
-				callback(memoryStorage[key], key);
-			}
-		}
-	}
+	  var _resolvedMoreFields; // cache
 
-	function remove$7(key) {
-		delete memoryStorage[key];
-	}
 
-	function clearAll$5(key) {
-		memoryStorage = {};
-	}
+	  var _searchName; // cache
 
-	var all = [
-		// Listed in order of usage preference
-		localStorage_1,
-		oldFFGlobalStorage,
-		oldIEUserDataStorage,
-		cookieStorage,
-		sessionStorage_1,
-		memoryStorage_1
-	];
 
-	/* eslint-disable */
+	  var _searchNameStripped; // cache
 
-	//  json2.js
-	//  2016-10-28
-	//  Public Domain.
-	//  NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
-	//  See http://www.JSON.org/js.html
-	//  This code should be minified before deployment.
-	//  See http://javascript.crockford.com/jsmin.html
 
-	//  USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
-	//  NOT CONTROL.
+	  _this.id = presetID;
+	  _this.safeid = utilSafeClassName(presetID); // for use in css classes, selectors, element ids
 
-	//  This file creates a global JSON object containing two methods: stringify
-	//  and parse. This file provides the ES5 JSON capability to ES3 systems.
-	//  If a project might run on IE8 or earlier, then this file should be included.
-	//  This file does nothing on ES5 systems.
+	  _this.originalTerms = (_this.terms || []).join();
+	  _this.originalName = _this.name || '';
+	  _this.originalScore = _this.matchScore || 1;
+	  _this.originalReference = _this.reference || {};
+	  _this.originalFields = _this.fields || [];
+	  _this.originalMoreFields = _this.moreFields || [];
 
-	//      JSON.stringify(value, replacer, space)
-	//          value       any JavaScript value, usually an object or array.
-	//          replacer    an optional parameter that determines how object
-	//                      values are stringified for objects. It can be a
-	//                      function or an array of strings.
-	//          space       an optional parameter that specifies the indentation
-	//                      of nested structures. If it is omitted, the text will
-	//                      be packed without extra whitespace. If it is a number,
-	//                      it will specify the number of spaces to indent at each
-	//                      level. If it is a string (such as "\t" or "&nbsp;"),
-	//                      it contains the characters used to indent at each level.
-	//          This method produces a JSON text from a JavaScript value.
-	//          When an object value is found, if the object contains a toJSON
-	//          method, its toJSON method will be called and the result will be
-	//          stringified. A toJSON method does not serialize: it returns the
-	//          value represented by the name/value pair that should be serialized,
-	//          or undefined if nothing should be serialized. The toJSON method
-	//          will be passed the key associated with the value, and this will be
-	//          bound to the value.
+	  _this.fields = function () {
+	    return _resolvedFields || (_resolvedFields = resolve('fields'));
+	  };
 
-	//          For example, this would serialize Dates as ISO strings.
+	  _this.moreFields = function () {
+	    return _resolvedMoreFields || (_resolvedMoreFields = resolve('moreFields'));
+	  };
 
-	//              Date.prototype.toJSON = function (key) {
-	//                  function f(n) {
-	//                      // Format integers to have at least two digits.
-	//                      return (n < 10)
-	//                          ? "0" + n
-	//                          : n;
-	//                  }
-	//                  return this.getUTCFullYear()   + "-" +
-	//                       f(this.getUTCMonth() + 1) + "-" +
-	//                       f(this.getUTCDate())      + "T" +
-	//                       f(this.getUTCHours())     + ":" +
-	//                       f(this.getUTCMinutes())   + ":" +
-	//                       f(this.getUTCSeconds())   + "Z";
-	//              };
+	  _this.resetFields = function () {
+	    return _resolvedFields = _resolvedMoreFields = null;
+	  };
 
-	//          You can provide an optional replacer method. It will be passed the
-	//          key and value of each member, with this bound to the containing
-	//          object. The value that is returned from your method will be
-	//          serialized. If your method returns undefined, then the member will
-	//          be excluded from the serialization.
+	  _this.tags = _this.tags || {};
+	  _this.addTags = _this.addTags || _this.tags;
+	  _this.removeTags = _this.removeTags || _this.addTags;
+	  _this.geometry = _this.geometry || [];
 
-	//          If the replacer parameter is an array of strings, then it will be
-	//          used to select the members to be serialized. It filters the results
-	//          such that only members with keys listed in the replacer array are
-	//          stringified.
+	  _this.matchGeometry = function (geom) {
+	    return _this.geometry.indexOf(geom) >= 0;
+	  };
 
-	//          Values that do not have JSON representations, such as undefined or
-	//          functions, will not be serialized. Such values in objects will be
-	//          dropped; in arrays they will be replaced with null. You can use
-	//          a replacer function to replace those with JSON values.
+	  _this.matchAllGeometry = function (geoms) {
+	    return geoms.every(_this.matchGeometry);
+	  };
 
-	//          JSON.stringify(undefined) returns undefined.
+	  _this.matchScore = function (entityTags) {
+	    var tags = _this.tags;
+	    var seen = {};
+	    var score = 0; // match on tags
 
-	//          The optional space parameter produces a stringification of the
-	//          value that is filled with line breaks and indentation to make it
-	//          easier to read.
+	    for (var k in tags) {
+	      seen[k] = true;
 
-	//          If the space parameter is a non-empty string, then that string will
-	//          be used for indentation. If the space parameter is a number, then
-	//          the indentation will be that many spaces.
+	      if (entityTags[k] === tags[k]) {
+	        score += _this.originalScore;
+	      } else if (tags[k] === '*' && k in entityTags) {
+	        score += _this.originalScore / 2;
+	      } else {
+	        return -1;
+	      }
+	    } // boost score for additional matches in addTags - #6802
 
-	//          Example:
 
-	//          text = JSON.stringify(["e", {pluribus: "unum"}]);
-	//          // text is '["e",{"pluribus":"unum"}]'
+	    var addTags = _this.addTags;
 
-	//          text = JSON.stringify(["e", {pluribus: "unum"}], null, "\t");
-	//          // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
+	    for (var _k in addTags) {
+	      if (!seen[_k] && entityTags[_k] === addTags[_k]) {
+	        score += _this.originalScore;
+	      }
+	    }
 
-	//          text = JSON.stringify([new Date()], function (key, value) {
-	//              return this[key] instanceof Date
-	//                  ? "Date(" + this[key] + ")"
-	//                  : value;
-	//          });
-	//          // text is '["Date(---current time---)"]'
+	    return score;
+	  };
 
-	//      JSON.parse(text, reviver)
-	//          This method parses a JSON text to produce an object or array.
-	//          It can throw a SyntaxError exception.
+	  _this.t = function (scope, options) {
+	    var textID = "_tagging.presets.presets.".concat(presetID, ".").concat(scope);
+	    return _t(textID, options);
+	  };
 
-	//          The optional reviver parameter is a function that can filter and
-	//          transform the results. It receives each of the keys and values,
-	//          and its return value is used instead of the original value.
-	//          If it returns what it received, then the structure is not modified.
-	//          If it returns undefined then the member is deleted.
+	  _this.t.html = function (scope, options) {
+	    var textID = "_tagging.presets.presets.".concat(presetID, ".").concat(scope);
+	    return _t.html(textID, options);
+	  };
 
-	//          Example:
+	  _this.name = function () {
+	    return _this.t('name', {
+	      'default': _this.originalName
+	    });
+	  };
 
-	//          // Parse the text. Values that look like ISO date strings will
-	//          // be converted to Date objects.
+	  _this.nameLabel = function () {
+	    return _this.t.html('name', {
+	      'default': _this.originalName
+	    });
+	  };
 
-	//          myData = JSON.parse(text, function (key, value) {
-	//              var a;
-	//              if (typeof value === "string") {
-	//                  a =
-	//   /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
-	//                  if (a) {
-	//                      return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
-	//                          +a[5], +a[6]));
-	//                  }
-	//              }
-	//              return value;
-	//          });
+	  _this.subtitle = function () {
+	    if (_this.suggestion) {
+	      var path = presetID.split('/');
+	      path.pop(); // remove brand name
 
-	//          myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
-	//              var d;
-	//              if (typeof value === "string" &&
-	//                      value.slice(0, 5) === "Date(" &&
-	//                      value.slice(-1) === ")") {
-	//                  d = new Date(value.slice(5, -1));
-	//                  if (d) {
-	//                      return d;
-	//                  }
-	//              }
-	//              return value;
-	//          });
+	      return _t('_tagging.presets.presets.' + path.join('/') + '.name');
+	    }
+
+	    return null;
+	  };
+
+	  _this.subtitleLabel = function () {
+	    if (_this.suggestion) {
+	      var path = presetID.split('/');
+	      path.pop(); // remove brand name
+
+	      return _t.html('_tagging.presets.presets.' + path.join('/') + '.name');
+	    }
+
+	    return null;
+	  };
+
+	  _this.terms = function () {
+	    return _this.t('terms', {
+	      'default': _this.originalTerms
+	    }).toLowerCase().trim().split(/\s*,+\s*/);
+	  };
+
+	  _this.searchName = function () {
+	    if (!_searchName) {
+	      _searchName = (_this.suggestion ? _this.originalName : _this.name()).toLowerCase();
+	    }
+
+	    return _searchName;
+	  };
+
+	  _this.searchNameStripped = function () {
+	    if (!_searchNameStripped) {
+	      _searchNameStripped = _this.searchName(); // split combined diacritical characters into their parts
 
-	//  This is a reference implementation. You are free to copy, modify, or
-	//  redistribute.
+	      if (_searchNameStripped.normalize) _searchNameStripped = _searchNameStripped.normalize('NFD'); // remove diacritics
 
-	/*jslint
-	    eval, for, this
-	*/
+	      _searchNameStripped = _searchNameStripped.replace(/[\u0300-\u036f]/g, '');
+	    }
 
-	/*property
-	    JSON, apply, call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
-	    getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
-	    lastIndex, length, parse, prototype, push, replace, slice, stringify,
-	    test, toJSON, toString, valueOf
-	*/
+	    return _searchNameStripped;
+	  };
+
+	  _this.isFallback = function () {
+	    var tagCount = Object.keys(_this.tags).length;
+	    return tagCount === 0 || tagCount === 1 && _this.tags.hasOwnProperty('area');
+	  };
 
+	  _this.addable = function (val) {
+	    if (!arguments.length) return _addable;
+	    _addable = val;
+	    return _this;
+	  };
 
-	// Create a JSON object only if one does not already exist. We create the
-	// methods in a closure to avoid creating global variables.
+	  _this.reference = function () {
+	    // Lookup documentation on Wikidata...
+	    var qid = _this.tags.wikidata || _this.tags['flag:wikidata'] || _this.tags['brand:wikidata'] || _this.tags['network:wikidata'] || _this.tags['operator:wikidata'];
 
-	if (typeof JSON !== "object") {
-	    JSON = {};
-	}
+	    if (qid) {
+	      return {
+	        qid: qid
+	      };
+	    } // Lookup documentation on OSM Wikibase...
 
-	(function () {
 
-	    var rx_one = /^[\],:{}\s]*$/;
-	    var rx_two = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g;
-	    var rx_three = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g;
-	    var rx_four = /(?:^|:|,)(?:\s*\[)+/g;
-	    var rx_escapable = /[\\"\u0000-\u001f\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
-	    var rx_dangerous = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
+	    var key = _this.originalReference.key || Object.keys(utilObjectOmit(_this.tags, 'name'))[0];
+	    var value = _this.originalReference.value || _this.tags[key];
 
-	    function f(n) {
-	        // Format integers to have at least two digits.
-	        return n < 10
-	            ? "0" + n
-	            : n;
+	    if (value === '*') {
+	      return {
+	        key: key
+	      };
+	    } else {
+	      return {
+	        key: key,
+	        value: value
+	      };
 	    }
+	  };
 
-	    function this_value() {
-	        return this.valueOf();
+	  _this.unsetTags = function (tags, geometry, ignoringKeys, skipFieldDefaults) {
+	    // allow manually keeping some tags
+	    var removeTags = ignoringKeys ? utilObjectOmit(_this.removeTags, ignoringKeys) : _this.removeTags;
+	    tags = utilObjectOmit(tags, Object.keys(removeTags));
+
+	    if (geometry && !skipFieldDefaults) {
+	      _this.fields().forEach(function (field) {
+	        if (field.matchGeometry(geometry) && field.key && field["default"] === tags[field.key]) {
+	          delete tags[field.key];
+	        }
+	      });
 	    }
 
-	    if (typeof Date.prototype.toJSON !== "function") {
+	    delete tags.area;
+	    return tags;
+	  };
 
-	        Date.prototype.toJSON = function () {
+	  _this.setTags = function (tags, geometry, skipFieldDefaults) {
+	    var addTags = _this.addTags;
+	    tags = Object.assign({}, tags); // shallow copy
 
-	            return isFinite(this.valueOf())
-	                ? this.getUTCFullYear() + "-" +
-	                        f(this.getUTCMonth() + 1) + "-" +
-	                        f(this.getUTCDate()) + "T" +
-	                        f(this.getUTCHours()) + ":" +
-	                        f(this.getUTCMinutes()) + ":" +
-	                        f(this.getUTCSeconds()) + "Z"
-	                : null;
-	        };
+	    for (var k in addTags) {
+	      if (addTags[k] === '*') {
+	        // if this tag is ancillary, don't override an existing value since any value is okay
+	        if (_this.tags[k] || !tags[k] || tags[k] === 'no') {
+	          tags[k] = 'yes';
+	        }
+	      } else {
+	        tags[k] = addTags[k];
+	      }
+	    } // Add area=yes if necessary.
+	    // This is necessary if the geometry is already an area (e.g. user drew an area) AND any of:
+	    // 1. chosen preset could be either an area or a line (`barrier=city_wall`)
+	    // 2. chosen preset doesn't have a key in osmAreaKeys (`railway=station`)
 
-	        Boolean.prototype.toJSON = this_value;
-	        Number.prototype.toJSON = this_value;
-	        String.prototype.toJSON = this_value;
-	    }
 
-	    var gap;
-	    var indent;
-	    var meta;
-	    var rep;
+	    if (!addTags.hasOwnProperty('area')) {
+	      delete tags.area;
 
+	      if (geometry === 'area') {
+	        var needsAreaTag = true;
 
-	    function quote(string) {
+	        if (_this.geometry.indexOf('line') === -1) {
+	          for (var _k2 in addTags) {
+	            if (_k2 in osmAreaKeys) {
+	              needsAreaTag = false;
+	              break;
+	            }
+	          }
+	        }
 
-	// If the string contains no control characters, no quote characters, and no
-	// backslash characters, then we can safely slap some quotes around it.
-	// Otherwise we must also replace the offending characters with safe escape
-	// sequences.
+	        if (needsAreaTag) {
+	          tags.area = 'yes';
+	        }
+	      }
+	    }
 
-	        rx_escapable.lastIndex = 0;
-	        return rx_escapable.test(string)
-	            ? "\"" + string.replace(rx_escapable, function (a) {
-	                var c = meta[a];
-	                return typeof c === "string"
-	                    ? c
-	                    : "\\u" + ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
-	            }) + "\""
-	            : "\"" + string + "\"";
+	    if (geometry && !skipFieldDefaults) {
+	      _this.fields().forEach(function (field) {
+	        if (field.matchGeometry(geometry) && field.key && !tags[field.key] && field["default"]) {
+	          tags[field.key] = field["default"];
+	        }
+	      });
 	    }
 
+	    return tags;
+	  }; // For a preset without fields, use the fields of the parent preset.
+	  // Replace {preset} placeholders with the fields of the specified presets.
+
 
-	    function str(key, holder) {
+	  function resolve(which) {
+	    var fieldIDs = which === 'fields' ? _this.originalFields : _this.originalMoreFields;
+	    var resolved = [];
+	    fieldIDs.forEach(function (fieldID) {
+	      var match = fieldID.match(/\{(.*)\}/);
 
-	// Produce a string from holder[key].
+	      if (match !== null) {
+	        // a presetID wrapped in braces {}
+	        resolved = resolved.concat(inheritFields(match[1], which));
+	      } else if (allFields[fieldID]) {
+	        // a normal fieldID
+	        resolved.push(allFields[fieldID]);
+	      } else {
+	        console.log("Cannot resolve \"".concat(fieldID, "\" found in ").concat(_this.id, ".").concat(which)); // eslint-disable-line no-console
+	      }
+	    }); // no fields resolved, so use the parent's if possible
 
-	        var i;          // The loop counter.
-	        var k;          // The member key.
-	        var v;          // The member value.
-	        var length;
-	        var mind = gap;
-	        var partial;
-	        var value = holder[key];
+	    if (!resolved.length) {
+	      var endIndex = _this.id.lastIndexOf('/');
 
-	// If the value has a toJSON method, call it to obtain a replacement value.
+	      var parentID = endIndex && _this.id.substring(0, endIndex);
 
-	        if (value && typeof value === "object" &&
-	                typeof value.toJSON === "function") {
-	            value = value.toJSON(key);
-	        }
+	      if (parentID) {
+	        resolved = inheritFields(parentID, which);
+	      }
+	    }
 
-	// If we were called with a replacer function, then call the replacer to
-	// obtain a replacement value.
+	    return utilArrayUniq(resolved); // returns an array of fields to inherit from the given presetID, if found
+
+	    function inheritFields(presetID, which) {
+	      var parent = allPresets[presetID];
+	      if (!parent) return [];
+
+	      if (which === 'fields') {
+	        return parent.fields().filter(shouldInherit);
+	      } else if (which === 'moreFields') {
+	        return parent.moreFields();
+	      } else {
+	        return [];
+	      }
+	    } // Skip `fields` for the keys which define the preset.
+	    // These are usually `typeCombo` fields like `shop=*`
 
-	        if (typeof rep === "function") {
-	            value = rep.call(holder, key, value);
-	        }
 
-	// What happens next depends on the value's type.
+	    function shouldInherit(f) {
+	      if (f.key && _this.tags[f.key] !== undefined && // inherit anyway if multiple values are allowed or just a checkbox
+	      f.type !== 'multiCombo' && f.type !== 'semiCombo' && f.type !== 'manyCombo' && f.type !== 'check') return false;
+	      return true;
+	    }
+	  }
+
+	  return _this;
+	}
+
+	var _mainPresetIndex = presetIndex(); // singleton
+	// `presetIndex` wraps a `presetCollection`
+	// with methods for loading new data and returning defaults
+	//
 
-	        switch (typeof value) {
-	        case "string":
-	            return quote(value);
+	function presetIndex() {
+	  var dispatch = dispatch$8('favoritePreset', 'recentsChange');
+	  var MAXRECENTS = 30; // seed the preset lists with geometry fallbacks
 
-	        case "number":
+	  var POINT = presetPreset('point', {
+	    name: 'Point',
+	    tags: {},
+	    geometry: ['point', 'vertex'],
+	    matchScore: 0.1
+	  });
+	  var LINE = presetPreset('line', {
+	    name: 'Line',
+	    tags: {},
+	    geometry: ['line'],
+	    matchScore: 0.1
+	  });
+	  var AREA = presetPreset('area', {
+	    name: 'Area',
+	    tags: {
+	      area: 'yes'
+	    },
+	    geometry: ['area'],
+	    matchScore: 0.1
+	  });
+	  var RELATION = presetPreset('relation', {
+	    name: 'Relation',
+	    tags: {},
+	    geometry: ['relation'],
+	    matchScore: 0.1
+	  });
 
-	// JSON numbers must be finite. Encode non-finite numbers as null.
+	  var _this = presetCollection([POINT, LINE, AREA, RELATION]);
 
-	            return isFinite(value)
-	                ? String(value)
-	                : "null";
+	  var _presets = {
+	    point: POINT,
+	    line: LINE,
+	    area: AREA,
+	    relation: RELATION
+	  };
+	  var _defaults = {
+	    point: presetCollection([POINT]),
+	    vertex: presetCollection([POINT]),
+	    line: presetCollection([LINE]),
+	    area: presetCollection([AREA]),
+	    relation: presetCollection([RELATION])
+	  };
+	  var _fields = {};
+	  var _categories = {};
+	  var _universal = [];
+	  var _addablePresetIDs = null; // Set of preset IDs that the user can add
 
-	        case "boolean":
-	        case "null":
+	  var _recents;
 
-	// If the value is a boolean or null, convert it to a string. Note:
-	// typeof null does not produce "null". The case is included here in
-	// the remote chance that this gets fixed someday.
+	  var _favorites; // Index of presets by (geometry, tag key).
 
-	            return String(value);
 
-	// If the type is "object", we might be dealing with an object or an array or
-	// null.
+	  var _geometryIndex = {
+	    point: {},
+	    vertex: {},
+	    line: {},
+	    area: {},
+	    relation: {}
+	  };
 
-	        case "object":
+	  var _loadPromise;
 
-	// Due to a specification blunder in ECMAScript, typeof null is "object",
-	// so watch out for that case.
+	  _this.ensureLoaded = function () {
+	    if (_loadPromise) return _loadPromise;
+	    return _loadPromise = Promise.all([_mainFileFetcher.get('preset_categories'), _mainFileFetcher.get('preset_defaults'), _mainFileFetcher.get('preset_presets'), _mainFileFetcher.get('preset_fields')]).then(function (vals) {
+	      _this.merge({
+	        categories: vals[0],
+	        defaults: vals[1],
+	        presets: vals[2],
+	        fields: vals[3]
+	      });
 
-	            if (!value) {
-	                return "null";
-	            }
+	      osmSetAreaKeys(_this.areaKeys());
+	      osmSetPointTags(_this.pointTags());
+	      osmSetVertexTags(_this.vertexTags());
+	    });
+	  }; // `merge` accepts an object containing new preset data (all properties optional):
+	  // {
+	  //   fields: {},
+	  //   presets: {},
+	  //   categories: {},
+	  //   defaults: {},
+	  //   featureCollection: {}
+	  //}
 
-	// Make an array to hold the partial results of stringifying this object value.
 
-	            gap += indent;
-	            partial = [];
+	  _this.merge = function (d) {
+	    var newLocationSets = []; // Merge Fields
 
-	// Is the value an array?
+	    if (d.fields) {
+	      Object.keys(d.fields).forEach(function (fieldID) {
+	        var f = d.fields[fieldID];
 
-	            if (Object.prototype.toString.apply(value) === "[object Array]") {
+	        if (f) {
+	          // add or replace
+	          f = presetField(fieldID, f);
+	          if (f.locationSet) newLocationSets.push(f);
+	          _fields[fieldID] = f;
+	        } else {
+	          // remove
+	          delete _fields[fieldID];
+	        }
+	      });
+	    } // Merge Presets
 
-	// The value is an array. Stringify every element. Use null as a placeholder
-	// for non-JSON values.
 
-	                length = value.length;
-	                for (i = 0; i < length; i += 1) {
-	                    partial[i] = str(i, value) || "null";
-	                }
+	    if (d.presets) {
+	      Object.keys(d.presets).forEach(function (presetID) {
+	        var p = d.presets[presetID];
 
-	// Join all of the elements together, separated with commas, and wrap them in
-	// brackets.
+	        if (p) {
+	          // add or replace
+	          var isAddable = !_addablePresetIDs || _addablePresetIDs.has(presetID);
 
-	                v = partial.length === 0
-	                    ? "[]"
-	                    : gap
-	                        ? "[\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "]"
-	                        : "[" + partial.join(",") + "]";
-	                gap = mind;
-	                return v;
-	            }
+	          p = presetPreset(presetID, p, isAddable, _fields, _presets);
+	          if (p.locationSet) newLocationSets.push(p);
+	          _presets[presetID] = p;
+	        } else {
+	          // remove (but not if it's a fallback)
+	          var existing = _presets[presetID];
 
-	// If the replacer is an array, use it to select the members to be stringified.
-
-	            if (rep && typeof rep === "object") {
-	                length = rep.length;
-	                for (i = 0; i < length; i += 1) {
-	                    if (typeof rep[i] === "string") {
-	                        k = rep[i];
-	                        v = str(k, value);
-	                        if (v) {
-	                            partial.push(quote(k) + (
-	                                gap
-	                                    ? ": "
-	                                    : ":"
-	                            ) + v);
-	                        }
-	                    }
-	                }
-	            } else {
+	          if (existing && !existing.isFallback()) {
+	            delete _presets[presetID];
+	          }
+	        }
+	      });
+	    } // Merge Categories
 
-	// Otherwise, iterate through all of the keys in the object.
-
-	                for (k in value) {
-	                    if (Object.prototype.hasOwnProperty.call(value, k)) {
-	                        v = str(k, value);
-	                        if (v) {
-	                            partial.push(quote(k) + (
-	                                gap
-	                                    ? ": "
-	                                    : ":"
-	                            ) + v);
-	                        }
-	                    }
-	                }
-	            }
 
-	// Join all of the member texts together, separated with commas,
-	// and wrap them in braces.
+	    if (d.categories) {
+	      Object.keys(d.categories).forEach(function (categoryID) {
+	        var c = d.categories[categoryID];
 
-	            v = partial.length === 0
-	                ? "{}"
-	                : gap
-	                    ? "{\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "}"
-	                    : "{" + partial.join(",") + "}";
-	            gap = mind;
-	            return v;
+	        if (c) {
+	          // add or replace
+	          c = presetCategory(categoryID, c, _presets);
+	          if (c.locationSet) newLocationSets.push(c);
+	          _categories[categoryID] = c;
+	        } else {
+	          // remove
+	          delete _categories[categoryID];
 	        }
-	    }
+	      });
+	    } // Rebuild _this.collection after changing presets and categories
 
-	// If the JSON object does not yet have a stringify method, give it one.
 
-	    if (typeof JSON.stringify !== "function") {
-	        meta = {    // table of character substitutions
-	            "\b": "\\b",
-	            "\t": "\\t",
-	            "\n": "\\n",
-	            "\f": "\\f",
-	            "\r": "\\r",
-	            "\"": "\\\"",
-	            "\\": "\\\\"
-	        };
-	        JSON.stringify = function (value, replacer, space) {
+	    _this.collection = Object.values(_presets).concat(Object.values(_categories)); // Merge Defaults
+
+	    if (d.defaults) {
+	      Object.keys(d.defaults).forEach(function (geometry) {
+	        var def = d.defaults[geometry];
+
+	        if (Array.isArray(def)) {
+	          // add or replace
+	          _defaults[geometry] = presetCollection(def.map(function (id) {
+	            return _presets[id] || _categories[id];
+	          }).filter(Boolean));
+	        } else {
+	          // remove
+	          delete _defaults[geometry];
+	        }
+	      });
+	    } // Rebuild universal fields array
 
-	// The stringify method takes a value and an optional replacer, and an optional
-	// space parameter, and returns a JSON text. The replacer can be a function
-	// that can replace values, or an array of strings that will select the keys.
-	// A default replacer method can be provided. Use of the space parameter can
-	// produce text that is more easily readable.
 
-	            var i;
-	            gap = "";
-	            indent = "";
+	    _universal = Object.values(_fields).filter(function (field) {
+	      return field.universal;
+	    }); // Reset all the preset fields - they'll need to be resolved again
 
-	// If the space parameter is a number, make an indent string containing that
-	// many spaces.
+	    Object.values(_presets).forEach(function (preset) {
+	      return preset.resetFields();
+	    }); // Rebuild geometry index
 
-	            if (typeof space === "number") {
-	                for (i = 0; i < space; i += 1) {
-	                    indent += " ";
-	                }
+	    _geometryIndex = {
+	      point: {},
+	      vertex: {},
+	      line: {},
+	      area: {},
+	      relation: {}
+	    };
 
-	// If the space parameter is a string, it will be used as the indent string.
+	    _this.collection.forEach(function (preset) {
+	      (preset.geometry || []).forEach(function (geometry) {
+	        var g = _geometryIndex[geometry];
 
-	            } else if (typeof space === "string") {
-	                indent = space;
-	            }
+	        for (var key in preset.tags) {
+	          g[key] = g[key] || {};
+	          var value = preset.tags[key];
+	          (g[key][value] = g[key][value] || []).push(preset);
+	        }
+	      });
+	    }); // Merge Custom Features
 
-	// If there is a replacer, it must be a function or an array.
-	// Otherwise, throw an error.
 
-	            rep = replacer;
-	            if (replacer && typeof replacer !== "function" &&
-	                    (typeof replacer !== "object" ||
-	                    typeof replacer.length !== "number")) {
-	                throw new Error("JSON.stringify");
-	            }
+	    if (d.featureCollection && Array.isArray(d.featureCollection.features)) {
+	      _mainLocations.mergeCustomGeoJSON(d.featureCollection);
+	    } // Resolve all locationSet features.
 
-	// Make a fake root object containing our value under the key of "".
-	// Return the result of stringifying the value.
 
-	            return str("", {"": value});
-	        };
+	    if (newLocationSets.length) {
+	      _mainLocations.mergeLocationSets(newLocationSets);
 	    }
 
+	    return _this;
+	  };
+
+	  _this.match = function (entity, resolver) {
+	    return resolver["transient"](entity, 'presetMatch', function () {
+	      var geometry = entity.geometry(resolver); // Treat entities on addr:interpolation lines as points, not vertices - #3241
 
-	// If the JSON object does not yet have a parse method, give it one.
+	      if (geometry === 'vertex' && entity.isOnAddressLine(resolver)) {
+	        geometry = 'point';
+	      }
 
-	    if (typeof JSON.parse !== "function") {
-	        JSON.parse = function (text, reviver) {
+	      var entityExtent = entity.extent(resolver);
+	      return _this.matchTags(entity.tags, geometry, entityExtent.center());
+	    });
+	  };
 
-	// The parse method takes a text and an optional reviver function, and returns
-	// a JavaScript value if the text is a valid JSON text.
+	  _this.matchTags = function (tags, geometry, loc) {
+	    var keyIndex = _geometryIndex[geometry];
+	    var bestScore = -1;
+	    var bestMatch;
+	    var matchCandidates = [];
 
-	            var j;
+	    for (var k in tags) {
+	      var indexMatches = [];
+	      var valueIndex = keyIndex[k];
+	      if (!valueIndex) continue;
+	      var keyValueMatches = valueIndex[tags[k]];
+	      if (keyValueMatches) indexMatches.push.apply(indexMatches, _toConsumableArray(keyValueMatches));
+	      var keyStarMatches = valueIndex['*'];
+	      if (keyStarMatches) indexMatches.push.apply(indexMatches, _toConsumableArray(keyStarMatches));
+	      if (indexMatches.length === 0) continue;
+
+	      for (var i = 0; i < indexMatches.length; i++) {
+	        var candidate = indexMatches[i];
+	        var score = candidate.matchScore(tags);
+
+	        if (score === -1) {
+	          continue;
+	        }
 
-	            function walk(holder, key) {
-
-	// The walk method is used to recursively walk the resulting structure so
-	// that modifications can be made.
-
-	                var k;
-	                var v;
-	                var value = holder[key];
-	                if (value && typeof value === "object") {
-	                    for (k in value) {
-	                        if (Object.prototype.hasOwnProperty.call(value, k)) {
-	                            v = walk(value, k);
-	                            if (v !== undefined) {
-	                                value[k] = v;
-	                            } else {
-	                                delete value[k];
-	                            }
-	                        }
-	                    }
-	                }
-	                return reviver.call(holder, key, value);
-	            }
+	        matchCandidates.push({
+	          score: score,
+	          candidate: candidate
+	        });
 
+	        if (score > bestScore) {
+	          bestScore = score;
+	          bestMatch = candidate;
+	        }
+	      }
+	    }
 
-	// Parsing happens in four stages. In the first stage, we replace certain
-	// Unicode characters with escape sequences. JavaScript handles many characters
-	// incorrectly, either silently deleting them, or treating them as line endings.
+	    if (bestMatch && bestMatch.locationSetID && bestMatch.locationSetID !== '+[Q2]' && Array.isArray(loc)) {
+	      var validLocations = _mainLocations.locationsAt(loc);
 
-	            text = String(text);
-	            rx_dangerous.lastIndex = 0;
-	            if (rx_dangerous.test(text)) {
-	                text = text.replace(rx_dangerous, function (a) {
-	                    return "\\u" +
-	                            ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
-	                });
-	            }
+	      if (!validLocations[bestMatch.locationSetID]) {
+	        matchCandidates.sort(function (a, b) {
+	          return a.score < b.score ? 1 : -1;
+	        });
 
-	// In the second stage, we run the text against regular expressions that look
-	// for non-JSON patterns. We are especially concerned with "()" and "new"
-	// because they can cause invocation, and "=" because it can cause mutation.
-	// But just to be safe, we want to reject all unexpected forms.
-
-	// We split the second stage into 4 regexp operations in order to work around
-	// crippling inefficiencies in IE's and Safari's regexp engines. First we
-	// replace the JSON backslash pairs with "@" (a non-JSON character). Second, we
-	// replace all simple value tokens with "]" characters. Third, we delete all
-	// open brackets that follow a colon or comma or that begin the text. Finally,
-	// we look to see that the remaining characters are only whitespace or "]" or
-	// "," or ":" or "{" or "}". If that is so, then the text is safe for eval.
-
-	            if (
-	                rx_one.test(
-	                    text
-	                        .replace(rx_two, "@")
-	                        .replace(rx_three, "]")
-	                        .replace(rx_four, "")
-	                )
-	            ) {
-
-	// In the third stage we use the eval function to compile the text into a
-	// JavaScript structure. The "{" operator is subject to a syntactic ambiguity
-	// in JavaScript: it can begin a block or an object literal. We wrap the text
-	// in parens to eliminate the ambiguity.
-
-	                j = eval("(" + text + ")");
-
-	// In the optional fourth stage, we recursively walk the new structure, passing
-	// each name/value pair to a reviver function for possible transformation.
-
-	                return (typeof reviver === "function")
-	                    ? walk({"": j}, "")
-	                    : j;
-	            }
+	        for (var _i = 0; _i < matchCandidates.length; _i++) {
+	          var candidateScore = matchCandidates[_i];
+
+	          if (!candidateScore.candidate.locationSetID || validLocations[candidateScore.candidate.locationSetID]) {
+	            bestMatch = candidateScore.candidate;
+	            bestScore = candidateScore.score;
+	            break;
+	          }
+	        }
+	      }
+	    } // If any part of an address is present, allow fallback to "Address" preset - #4353
 
-	// If the text is not JSON parseable, then a SyntaxError is thrown.
 
-	            throw new SyntaxError("JSON.parse");
-	        };
+	    if (!bestMatch || bestMatch.isFallback()) {
+	      for (var _k in tags) {
+	        if (/^addr:/.test(_k) && keyIndex['addr:*'] && keyIndex['addr:*']['*']) {
+	          bestMatch = keyIndex['addr:*']['*'][0];
+	          break;
+	        }
+	      }
 	    }
-	}());
 
-	var json2 = json2Plugin;
+	    return bestMatch || _this.fallback(geometry);
+	  };
 
-	function json2Plugin() {
-		
-		return {}
-	}
+	  _this.allowsVertex = function (entity, resolver) {
+	    if (entity.type !== 'node') return false;
+	    if (Object.keys(entity.tags).length === 0) return true;
+	    return resolver["transient"](entity, 'vertexMatch', function () {
+	      // address lines allow vertices to act as standalone points
+	      if (entity.isOnAddressLine(resolver)) return true;
+	      var geometries = osmNodeGeometriesForTags(entity.tags);
+	      if (geometries.vertex) return true;
+	      if (geometries.point) return false; // allow vertices for unspecified points
 
-	var plugins = [json2];
+	      return true;
+	    });
+	  }; // Because of the open nature of tagging, iD will never have a complete
+	  // list of tags used in OSM, so we want it to have logic like "assume
+	  // that a closed way with an amenity tag is an area, unless the amenity
+	  // is one of these specific types". This function computes a structure
+	  // that allows testing of such conditions, based on the presets designated
+	  // as as supporting (or not supporting) the area geometry.
+	  //
+	  // The returned object L is a keeplist/discardlist of tags. A closed way
+	  // with a tag (k, v) is considered to be an area if `k in L && !(v in L[k])`
+	  // (see `Way#isArea()`). In other words, the keys of L form the keeplist,
+	  // and the subkeys form the discardlist.
 
-	var store_legacy = storeEngine.createStore(all, plugins);
 
-	// # osm-auth
-	//
-	// This code is only compatible with IE10+ because the [XDomainRequest](http://bit.ly/LfO7xo)
-	// object, IE<10's idea of [CORS](http://en.wikipedia.org/wiki/Cross-origin_resource_sharing),
-	// does not support custom headers, which this uses everywhere.
-	var osmAuth = function(o) {
+	  _this.areaKeys = function () {
+	    // The ignore list is for keys that imply lines. (We always add `area=yes` for exceptions)
+	    var ignore = ['barrier', 'highway', 'footway', 'railway', 'junction', 'type'];
+	    var areaKeys = {}; // ignore name-suggestion-index and deprecated presets
 
-	    var oauth = {};
+	    var presets = _this.collection.filter(function (p) {
+	      return !p.suggestion && !p.replacement;
+	    }); // keeplist
 
-	    // authenticated users will also have a request token secret, but it's
-	    // not used in transactions with the server
-	    oauth.authenticated = function() {
-	        return !!(token('oauth_token') && token('oauth_token_secret'));
-	    };
 
-	    oauth.logout = function() {
-	        token('oauth_token', '');
-	        token('oauth_token_secret', '');
-	        token('oauth_request_token_secret', '');
-	        return oauth;
-	    };
+	    presets.forEach(function (p) {
+	      var keys = p.tags && Object.keys(p.tags);
+	      var key = keys && keys.length && keys[0]; // pick the first tag
 
-	    // TODO: detect lack of click event
-	    oauth.authenticate = function(callback) {
-	        if (oauth.authenticated()) { return callback(); }
-
-	        oauth.logout();
-
-	        // ## Getting a request token
-	        var params = timenonce(getAuth(o)),
-	            url = o.url + '/oauth/request_token';
-
-	        params.oauth_signature = ohauth_1.signature(
-	            o.oauth_secret, '',
-	            ohauth_1.baseString('POST', url, params));
-
-	        if (!o.singlepage) {
-	            // Create a 600x550 popup window in the center of the screen
-	            var w = 600, h = 550,
-	                settings = [
-	                    ['width', w], ['height', h],
-	                    ['left', screen.width / 2 - w / 2],
-	                    ['top', screen.height / 2 - h / 2]].map(function(x) {
-	                        return x.join('=');
-	                    }).join(','),
-	                popup = window.open('about:blank', 'oauth_window', settings);
-
-	            oauth.popupWindow = popup;
-
-	            if (!popup) {
-	                var error = new Error('Popup was blocked');
-	                error.status = 'popup-blocked';
-	                throw error;
-	            }
-	        }
+	      if (!key) return;
+	      if (ignore.indexOf(key) !== -1) return;
 
-	        // Request a request token. When this is complete, the popup
-	        // window is redirected to OSM's authorization page.
-	        ohauth_1.xhr('POST', url, params, null, {}, reqTokenDone);
-	        o.loading();
+	      if (p.geometry.indexOf('area') !== -1) {
+	        // probably an area..
+	        areaKeys[key] = areaKeys[key] || {};
+	      }
+	    }); // discardlist
 
-	        function reqTokenDone(err, xhr) {
-	            o.done();
-	            if (err) { return callback(err); }
-	            var resp = ohauth_1.stringQs(xhr.response);
-	            token('oauth_request_token_secret', resp.oauth_token_secret);
-	            var authorize_url = o.url + '/oauth/authorize?' + ohauth_1.qsString({
-	                oauth_token: resp.oauth_token,
-	                oauth_callback: resolveUrl$1(o.landing)
-	            });
+	    presets.forEach(function (p) {
+	      var key;
 
-	            if (o.singlepage) {
-	                location.href = authorize_url;
-	            } else {
-	                popup.location = authorize_url;
-	            }
+	      for (key in p.addTags) {
+	        // examine all addTags to get a better sense of what can be tagged on lines - #6800
+	        var value = p.addTags[key];
+
+	        if (key in areaKeys && // probably an area...
+	        p.geometry.indexOf('line') !== -1 && // but sometimes a line
+	        value !== '*') {
+	          areaKeys[key][value] = true;
 	        }
+	      }
+	    });
+	    return areaKeys;
+	  };
 
-	        // Called by a function in a landing page, in the popup window. The
-	        // window closes itself.
-	        window.authComplete = function(token) {
-	            var oauth_token = ohauth_1.stringQs(token.split('?')[1]);
-	            get_access_token(oauth_token.oauth_token);
-	            delete window.authComplete;
-	        };
+	  _this.pointTags = function () {
+	    return _this.collection.reduce(function (pointTags, d) {
+	      // ignore name-suggestion-index, deprecated, and generic presets
+	      if (d.suggestion || d.replacement || d.searchable === false) return pointTags; // only care about the primary tag
 
-	        // ## Getting an request token
-	        //
-	        // At this point we have an `oauth_token`, brought in from a function
-	        // call on a landing page popup.
-	        function get_access_token(oauth_token) {
-	            var url = o.url + '/oauth/access_token',
-	                params = timenonce(getAuth(o)),
-	                request_token_secret = token('oauth_request_token_secret');
-	            params.oauth_token = oauth_token;
-	            params.oauth_signature = ohauth_1.signature(
-	                o.oauth_secret,
-	                request_token_secret,
-	                ohauth_1.baseString('POST', url, params));
-
-	            // ## Getting an access token
-	            //
-	            // The final token required for authentication. At this point
-	            // we have a `request token secret`
-	            ohauth_1.xhr('POST', url, params, null, {}, accessTokenDone);
-	            o.loading();
-	        }
-
-	        function accessTokenDone(err, xhr) {
-	            o.done();
-	            if (err) { return callback(err); }
-	            var access_token = ohauth_1.stringQs(xhr.response);
-	            token('oauth_token', access_token.oauth_token);
-	            token('oauth_token_secret', access_token.oauth_token_secret);
-	            callback(null, oauth);
-	        }
-	    };
+	      var keys = d.tags && Object.keys(d.tags);
+	      var key = keys && keys.length && keys[0]; // pick the first tag
 
-	    oauth.bringPopupWindowToFront = function() {
-	        var brougtPopupToFront = false;
-	        try {
-	            // This may cause a cross-origin error:
-	            // `DOMException: Blocked a frame with origin "..." from accessing a cross-origin frame.`
-	            if (oauth.popupWindow && !oauth.popupWindow.closed) {
-	                oauth.popupWindow.focus();
-	                brougtPopupToFront = true;
-	            }
-	        } catch (err) {
-	            // Bringing popup window to front failed (probably because of the cross-origin error mentioned above)
-	        }
-	        return brougtPopupToFront;
-	    };
+	      if (!key) return pointTags; // if this can be a point
 
-	    oauth.bootstrapToken = function(oauth_token, callback) {
-	        // ## Getting an request token
-	        // At this point we have an `oauth_token`, brought in from a function
-	        // call on a landing page popup.
-	        function get_access_token(oauth_token) {
-	            var url = o.url + '/oauth/access_token',
-	                params = timenonce(getAuth(o)),
-	                request_token_secret = token('oauth_request_token_secret');
-	            params.oauth_token = oauth_token;
-	            params.oauth_signature = ohauth_1.signature(
-	                o.oauth_secret,
-	                request_token_secret,
-	                ohauth_1.baseString('POST', url, params));
-
-	            // ## Getting an access token
-	            // The final token required for authentication. At this point
-	            // we have a `request token secret`
-	            ohauth_1.xhr('POST', url, params, null, {}, accessTokenDone);
-	            o.loading();
-	        }
-
-	        function accessTokenDone(err, xhr) {
-	            o.done();
-	            if (err) { return callback(err); }
-	            var access_token = ohauth_1.stringQs(xhr.response);
-	            token('oauth_token', access_token.oauth_token);
-	            token('oauth_token_secret', access_token.oauth_token_secret);
-	            callback(null, oauth);
-	        }
-
-	        get_access_token(oauth_token);
-	    };
+	      if (d.geometry.indexOf('point') !== -1) {
+	        pointTags[key] = pointTags[key] || {};
+	        pointTags[key][d.tags[key]] = true;
+	      }
 
-	    // # xhr
-	    //
-	    // A single XMLHttpRequest wrapper that does authenticated calls if the
-	    // user has logged in.
-	    oauth.xhr = function(options, callback) {
-	        if (!oauth.authenticated()) {
-	            if (o.auto) {
-	                return oauth.authenticate(run);
-	            } else {
-	                callback('not authenticated', null);
-	                return;
-	            }
-	        } else {
-	            return run();
-	        }
-
-	        function run() {
-	            var params = timenonce(getAuth(o)),
-	                oauth_token_secret = token('oauth_token_secret'),
-	                url = (options.prefix !== false) ? o.url + options.path : options.path,
-	                url_parts = url.replace(/#.*$/, '').split('?', 2),
-	                base_url = url_parts[0],
-	                query = (url_parts.length === 2) ? url_parts[1] : '';
-
-	            // https://tools.ietf.org/html/rfc5849#section-3.4.1.3.1
-	            if ((!options.options || !options.options.header ||
-	                options.options.header['Content-Type'] === 'application/x-www-form-urlencoded') &&
-	                options.content) {
-	                params = immutable(params, ohauth_1.stringQs(options.content));
-	            }
+	      return pointTags;
+	    }, {});
+	  };
 
-	            params.oauth_token = token('oauth_token');
-	            params.oauth_signature = ohauth_1.signature(
-	                o.oauth_secret,
-	                oauth_token_secret,
-	                ohauth_1.baseString(options.method, base_url, immutable(params, ohauth_1.stringQs(query)))
-	            );
+	  _this.vertexTags = function () {
+	    return _this.collection.reduce(function (vertexTags, d) {
+	      // ignore name-suggestion-index, deprecated, and generic presets
+	      if (d.suggestion || d.replacement || d.searchable === false) return vertexTags; // only care about the primary tag
 
-	            return ohauth_1.xhr(options.method, url, params, options.content, options.options, done);
-	        }
+	      var keys = d.tags && Object.keys(d.tags);
+	      var key = keys && keys.length && keys[0]; // pick the first tag
 
-	        function done(err, xhr) {
-	            if (err) { return callback(err); }
-	            else if (xhr.responseXML) { return callback(err, xhr.responseXML); }
-	            else { return callback(err, xhr.response); }
-	        }
-	    };
+	      if (!key) return vertexTags; // if this can be a vertex
 
-	    // pre-authorize this object, if we can just get a token and token_secret
-	    // from the start
-	    oauth.preauth = function(c) {
-	        if (!c) { return; }
-	        if (c.oauth_token) { token('oauth_token', c.oauth_token); }
-	        if (c.oauth_token_secret) { token('oauth_token_secret', c.oauth_token_secret); }
-	        return oauth;
-	    };
+	      if (d.geometry.indexOf('vertex') !== -1) {
+	        vertexTags[key] = vertexTags[key] || {};
+	        vertexTags[key][d.tags[key]] = true;
+	      }
 
-	    oauth.options = function(_) {
-	        if (!arguments.length) { return o; }
+	      return vertexTags;
+	    }, {});
+	  };
 
-	        o = _;
-	        o.url = o.url || 'https://www.openstreetmap.org';
-	        o.landing = o.landing || 'land.html';
-	        o.singlepage = o.singlepage || false;
+	  _this.field = function (id) {
+	    return _fields[id];
+	  };
 
-	        // Optional loading and loading-done functions for nice UI feedback.
-	        // by default, no-ops
-	        o.loading = o.loading || function() {};
-	        o.done = o.done || function() {};
+	  _this.universal = function () {
+	    return _universal;
+	  };
 
-	        return oauth.preauth(o);
-	    };
+	  _this.defaults = function (geometry, n, startWithRecents, loc) {
+	    var recents = [];
 
-	    // 'stamp' an authentication object from `getAuth()`
-	    // with a [nonce](http://en.wikipedia.org/wiki/Cryptographic_nonce)
-	    // and timestamp
-	    function timenonce(o) {
-	        o.oauth_timestamp = ohauth_1.timestamp();
-	        o.oauth_nonce = ohauth_1.nonce();
-	        return o;
+	    if (startWithRecents) {
+	      recents = _this.recent().matchGeometry(geometry).collection.slice(0, 4);
 	    }
 
-	    // get/set tokens. These are prefixed with the base URL so that `osm-auth`
-	    // can be used with multiple APIs and the keys in `localStorage`
-	    // will not clash
-	    var token;
+	    var defaults;
 
-	    if (store_legacy.enabled) {
-	        token = function (x, y) {
-	            if (arguments.length === 1) { return store_legacy.get(o.url + x); }
-	            else if (arguments.length === 2) { return store_legacy.set(o.url + x, y); }
-	        };
+	    if (_addablePresetIDs) {
+	      defaults = Array.from(_addablePresetIDs).map(function (id) {
+	        var preset = _this.item(id);
+
+	        if (preset && preset.matchGeometry(geometry)) return preset;
+	        return null;
+	      }).filter(Boolean);
 	    } else {
-	        var storage = {};
-	        token = function (x, y) {
-	            if (arguments.length === 1) { return storage[o.url + x]; }
-	            else if (arguments.length === 2) { return storage[o.url + x] = y; }
-	        };
+	      defaults = _defaults[geometry].collection.concat(_this.fallback(geometry));
 	    }
 
-	    // Get an authentication object. If you just add and remove properties
-	    // from a single object, you'll need to use `delete` to make sure that
-	    // it doesn't contain undesired properties for authentication
-	    function getAuth(o) {
-	        return {
-	            oauth_consumer_key: o.oauth_consumer_key,
-	            oauth_signature_method: 'HMAC-SHA1'
-	        };
+	    var result = presetCollection(utilArrayUniq(recents.concat(defaults)).slice(0, n - 1));
+
+	    if (Array.isArray(loc)) {
+	      var validLocations = _mainLocations.locationsAt(loc);
+	      result.collection = result.collection.filter(function (a) {
+	        return !a.locationSetID || validLocations[a.locationSetID];
+	      });
 	    }
 
-	    // potentially pre-authorize
-	    oauth.options(o);
+	    return result;
+	  }; // pass a Set of addable preset ids
 
-	    return oauth;
-	};
 
-	var JXON = new (function () {
-	  var
-	    sValueProp = 'keyValue', sAttributesProp = 'keyAttributes', sAttrPref = '@', /* you can customize these values */
-	    aCache = [], rIsNull = /^\s*$/, rIsBool = /^(?:true|false)$/i;
+	  _this.addablePresetIDs = function (val) {
+	    if (!arguments.length) return _addablePresetIDs; // accept and convert arrays
 
-	  function parseText (sValue) {
-	    if (rIsNull.test(sValue)) { return null; }
-	    if (rIsBool.test(sValue)) { return sValue.toLowerCase() === 'true'; }
-	    if (isFinite(sValue)) { return parseFloat(sValue); }
-	    if (isFinite(Date.parse(sValue))) { return new Date(sValue); }
-	    return sValue;
-	  }
+	    if (Array.isArray(val)) val = new Set(val);
+	    _addablePresetIDs = val;
 
-	  function EmptyTree () { }
-	  EmptyTree.prototype.toString = function () { return 'null'; };
-	  EmptyTree.prototype.valueOf = function () { return null; };
+	    if (_addablePresetIDs) {
+	      // reset all presets
+	      _this.collection.forEach(function (p) {
+	        // categories aren't addable
+	        if (p.addable) p.addable(_addablePresetIDs.has(p.id));
+	      });
+	    } else {
+	      _this.collection.forEach(function (p) {
+	        if (p.addable) p.addable(true);
+	      });
+	    }
 
-	  function objectify (vValue) {
-	    return vValue === null ? new EmptyTree() : vValue instanceof Object ? vValue : new vValue.constructor(vValue);
-	  }
+	    return _this;
+	  };
 
-	  function createObjTree (oParentNode, nVerb, bFreeze, bNesteAttr) {
-	    var
-	      nLevelStart = aCache.length, bChildren = oParentNode.hasChildNodes(),
-	      bAttributes = oParentNode.hasAttributes(), bHighVerb = Boolean(nVerb & 2);
+	  _this.recent = function () {
+	    return presetCollection(utilArrayUniq(_this.getRecents().map(function (d) {
+	      return d.preset;
+	    })));
+	  };
 
-	    var
-	      sProp, vContent, nLength = 0, sCollectedTxt = '',
-	      vResult = bHighVerb ? {} : /* put here the default value for empty nodes: */ true;
+	  function RibbonItem(preset, source) {
+	    var item = {};
+	    item.preset = preset;
+	    item.source = source;
 
-	    if (bChildren) {
-	      for (var oNode, nItem = 0; nItem < oParentNode.childNodes.length; nItem++) {
-	        oNode = oParentNode.childNodes.item(nItem);
-	        if (oNode.nodeType === 4) { sCollectedTxt += oNode.nodeValue; } /* nodeType is 'CDATASection' (4) */
-	        else if (oNode.nodeType === 3) { sCollectedTxt += oNode.nodeValue.trim(); } /* nodeType is 'Text' (3) */
-	        else if (oNode.nodeType === 1 && !oNode.prefix) { aCache.push(oNode); } /* nodeType is 'Element' (1) */
-	      }
-	    }
+	    item.isFavorite = function () {
+	      return item.source === 'favorite';
+	    };
 
-	    var nLevelEnd = aCache.length, vBuiltVal = parseText(sCollectedTxt);
+	    item.isRecent = function () {
+	      return item.source === 'recent';
+	    };
 
-	    if (!bHighVerb && (bChildren || bAttributes)) { vResult = nVerb === 0 ? objectify(vBuiltVal) : {}; }
+	    item.matches = function (preset) {
+	      return item.preset.id === preset.id;
+	    };
 
-	    for (var nElId = nLevelStart; nElId < nLevelEnd; nElId++) {
-	      sProp = aCache[nElId].nodeName.toLowerCase();
-	      vContent = createObjTree(aCache[nElId], nVerb, bFreeze, bNesteAttr);
-	      if (vResult.hasOwnProperty(sProp)) {
-	        if (vResult[sProp].constructor !== Array) { vResult[sProp] = [vResult[sProp]]; }
-	        vResult[sProp].push(vContent);
-	      } else {
-	        vResult[sProp] = vContent;
-	        nLength++;
-	      }
-	    }
+	    item.minified = function () {
+	      return {
+	        pID: item.preset.id
+	      };
+	    };
 
-	    if (bAttributes) {
-	      var
-	        nAttrLen = oParentNode.attributes.length,
-	        sAPrefix = bNesteAttr ? '' : sAttrPref, oAttrParent = bNesteAttr ? {} : vResult;
+	    return item;
+	  }
 
-	      for (var oAttrib, nAttrib = 0; nAttrib < nAttrLen; nLength++, nAttrib++) {
-	        oAttrib = oParentNode.attributes.item(nAttrib);
-	        oAttrParent[sAPrefix + oAttrib.name.toLowerCase()] = parseText(oAttrib.value.trim());
-	      }
+	  function ribbonItemForMinified(d, source) {
+	    if (d && d.pID) {
+	      var preset = _this.item(d.pID);
 
-	      if (bNesteAttr) {
-	        if (bFreeze) { Object.freeze(oAttrParent); }
-	        vResult[sAttributesProp] = oAttrParent;
-	        nLength -= nAttrLen - 1;
-	      }
+	      if (!preset) return null;
+	      return RibbonItem(preset, source);
 	    }
 
-	    if (nVerb === 3 || (nVerb === 2 || nVerb === 1 && nLength > 0) && sCollectedTxt) {
-	      vResult[sValueProp] = vBuiltVal;
-	    } else if (!bHighVerb && nLength === 0 && sCollectedTxt) {
-	      vResult = vBuiltVal;
-	    }
+	    return null;
+	  }
+
+	  _this.getGenericRibbonItems = function () {
+	    return ['point', 'line', 'area'].map(function (id) {
+	      return RibbonItem(_this.item(id), 'generic');
+	    });
+	  };
 
-	    if (bFreeze && (bHighVerb || nLength > 0)) { Object.freeze(vResult); }
+	  _this.getAddable = function () {
+	    if (!_addablePresetIDs) return [];
+	    return _addablePresetIDs.map(function (id) {
+	      var preset = _this.item(id);
 
-	    aCache.length = nLevelStart;
+	      if (preset) return RibbonItem(preset, 'addable');
+	      return null;
+	    }).filter(Boolean);
+	  };
 
-	    return vResult;
+	  function setRecents(items) {
+	    _recents = items;
+	    var minifiedItems = items.map(function (d) {
+	      return d.minified();
+	    });
+	    corePreferences('preset_recents', JSON.stringify(minifiedItems));
+	    dispatch.call('recentsChange');
 	  }
 
-	  function loadObjTree (oXMLDoc, oParentEl, oParentObj) {
-	    var vValue, oChild;
-
-	    if (oParentObj instanceof String || oParentObj instanceof Number || oParentObj instanceof Boolean) {
-	      oParentEl.appendChild(oXMLDoc.createTextNode(oParentObj.toString())); /* verbosity level is 0 */
-	    } else if (oParentObj.constructor === Date) {
-	      oParentEl.appendChild(oXMLDoc.createTextNode(oParentObj.toGMTString()));    
+	  _this.getRecents = function () {
+	    if (!_recents) {
+	      // fetch from local storage
+	      _recents = (JSON.parse(corePreferences('preset_recents')) || []).reduce(function (acc, d) {
+	        var item = ribbonItemForMinified(d, 'recent');
+	        if (item && item.preset.addable()) acc.push(item);
+	        return acc;
+	      }, []);
 	    }
 
-	    for (var sName in oParentObj) {
-	      vValue = oParentObj[sName];
-	      if (isFinite(sName) || vValue instanceof Function) { continue; } /* verbosity level is 0 */
-	      if (sName === sValueProp) {
-	        if (vValue !== null && vValue !== true) { oParentEl.appendChild(oXMLDoc.createTextNode(vValue.constructor === Date ? vValue.toGMTString() : String(vValue))); }
-	      } else if (sName === sAttributesProp) { /* verbosity level is 3 */
-	        for (var sAttrib in vValue) { oParentEl.setAttribute(sAttrib, vValue[sAttrib]); }
-	      } else if (sName.charAt(0) === sAttrPref) {
-	        oParentEl.setAttribute(sName.slice(1), vValue);
-	      } else if (vValue.constructor === Array) {
-	        for (var nItem = 0; nItem < vValue.length; nItem++) {
-	          oChild = oXMLDoc.createElement(sName);
-	          loadObjTree(oXMLDoc, oChild, vValue[nItem]);
-	          oParentEl.appendChild(oChild);
-	        }
-	      } else {
-	        oChild = oXMLDoc.createElement(sName);
-	        if (vValue instanceof Object) {
-	          loadObjTree(oXMLDoc, oChild, vValue);
-	        } else if (vValue !== null && vValue !== true) {
-	          oChild.appendChild(oXMLDoc.createTextNode(vValue.toString()));
-	        }
-	        oParentEl.appendChild(oChild);
-	     }
-	   }
-	  }
-
-	  this.build = function (oXMLParent, nVerbosity /* optional */, bFreeze /* optional */, bNesteAttributes /* optional */) {
-	    var _nVerb = arguments.length > 1 && typeof nVerbosity === 'number' ? nVerbosity & 3 : /* put here the default verbosity level: */ 1;
-	    return createObjTree(oXMLParent, _nVerb, bFreeze || false, arguments.length > 3 ? bNesteAttributes : _nVerb === 3);    
+	    return _recents;
 	  };
 
-	  this.unbuild = function (oObjTree) {    
-	    var oNewDoc = document.implementation.createDocument('', '', null);
-	    loadObjTree(oNewDoc, oNewDoc, oObjTree);
-	    return oNewDoc;
+	  _this.addRecent = function (preset, besidePreset, after) {
+	    var recents = _this.getRecents();
+
+	    var beforeItem = _this.recentMatching(besidePreset);
+
+	    var toIndex = recents.indexOf(beforeItem);
+	    if (after) toIndex += 1;
+	    var newItem = RibbonItem(preset, 'recent');
+	    recents.splice(toIndex, 0, newItem);
+	    setRecents(recents);
 	  };
 
-	  this.stringify = function (oObjTree) {
-	    return (new XMLSerializer()).serializeToString(JXON.unbuild(oObjTree));
+	  _this.removeRecent = function (preset) {
+	    var item = _this.recentMatching(preset);
+
+	    if (item) {
+	      var items = _this.getRecents();
+
+	      items.splice(items.indexOf(item), 1);
+	      setRecents(items);
+	    }
 	  };
-	})();
 
-	// var myObject = JXON.build(doc);
-	// we got our javascript object! try: alert(JSON.stringify(myObject));
+	  _this.recentMatching = function (preset) {
+	    var items = _this.getRecents();
 
-	// var newDoc = JXON.unbuild(myObject);
-	// we got our Document instance! try: alert((new XMLSerializer()).serializeToString(newDoc));
+	    for (var i in items) {
+	      if (items[i].matches(preset)) {
+	        return items[i];
+	      }
+	    }
 
-	var tiler$5 = utilTiler();
-	var dispatch$6 = dispatch('apiStatusChange', 'authLoading', 'authDone', 'change', 'loading', 'loaded', 'loadedNotes');
-	var urlroot = 'https://www.openstreetmap.org';
-	var oauth = osmAuth({
-	    url: urlroot,
-	    oauth_consumer_key: '5A043yRSEugj4DJ5TljuapfnrflWDte8jTOcWLlT',
-	    oauth_secret: 'aB3jKq1TRsCOUrfOIZ6oQMEDmv2ptV76PA54NGLL',
-	    loading: authLoading,
-	    done: authDone
-	});
-	// hardcode default block of Google Maps
-	var _imageryBlocklists = [/.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/];
-	var _tileCache = { toLoad: {}, loaded: {}, inflight: {}, seen: {}, rtree: new RBush() };
-	var _noteCache = { toLoad: {}, loaded: {}, inflight: {}, inflightPost: {}, note: {}, closed: {}, rtree: new RBush() };
-	var _userCache = { toLoad: {}, user: {} };
-	var _cachedApiStatus;
-	var _changeset = {};
+	    return null;
+	  };
 
-	var _deferred = new Set();
-	var _connectionID = 1;
-	var _tileZoom$3 = 16;
-	var _noteZoom = 12;
-	var _rateLimitError;
-	var _userChangesets;
-	var _userDetails;
-	var _off;
+	  _this.moveItem = function (items, fromIndex, toIndex) {
+	    if (fromIndex === toIndex || fromIndex < 0 || toIndex < 0 || fromIndex >= items.length || toIndex >= items.length) return null;
+	    items.splice(toIndex, 0, items.splice(fromIndex, 1)[0]);
+	    return items;
+	  };
+
+	  _this.moveRecent = function (item, beforeItem) {
+	    var recents = _this.getRecents();
 
-	// set a default but also load this from the API status
-	var _maxWayNodes = 2000;
+	    var fromIndex = recents.indexOf(item);
+	    var toIndex = recents.indexOf(beforeItem);
 
+	    var items = _this.moveItem(recents, fromIndex, toIndex);
 
-	function authLoading() {
-	    dispatch$6.call('authLoading');
-	}
+	    if (items) setRecents(items);
+	  };
 
+	  _this.setMostRecent = function (preset) {
+	    if (preset.searchable === false) return;
 
-	function authDone() {
-	    dispatch$6.call('authDone');
-	}
+	    var items = _this.getRecents();
 
+	    var item = _this.recentMatching(preset);
 
-	function abortRequest$5(controllerOrXHR) {
-	    if (controllerOrXHR) {
-	        controllerOrXHR.abort();
-	    }
-	}
+	    if (item) {
+	      items.splice(items.indexOf(item), 1);
+	    } else {
+	      item = RibbonItem(preset, 'recent');
+	    } // remove the last recent (first in, first out)
 
 
-	function hasInflightRequests(cache) {
-	    return Object.keys(cache.inflight).length;
-	}
+	    while (items.length >= MAXRECENTS) {
+	      items.pop();
+	    } // prepend array
 
 
-	function abortUnwantedRequests$3(cache, visibleTiles) {
-	    Object.keys(cache.inflight).forEach(function(k) {
-	        if (cache.toLoad[k]) { return; }
-	        if (visibleTiles.find(function(tile) { return k === tile.id; })) { return; }
+	    items.unshift(item);
+	    setRecents(items);
+	  };
 
-	        abortRequest$5(cache.inflight[k]);
-	        delete cache.inflight[k];
+	  function setFavorites(items) {
+	    _favorites = items;
+	    var minifiedItems = items.map(function (d) {
+	      return d.minified();
 	    });
-	}
+	    corePreferences('preset_favorites', JSON.stringify(minifiedItems)); // call update
 
+	    dispatch.call('favoritePreset');
+	  }
 
-	function getLoc(attrs) {
-	    var lon = attrs.lon && attrs.lon.value;
-	    var lat = attrs.lat && attrs.lat.value;
-	    return [parseFloat(lon), parseFloat(lat)];
-	}
+	  _this.addFavorite = function (preset, besidePreset, after) {
+	    var favorites = _this.getFavorites();
 
+	    var beforeItem = _this.favoriteMatching(besidePreset);
 
-	function getNodes(obj) {
-	    var elems = obj.getElementsByTagName('nd');
-	    var nodes = new Array(elems.length);
-	    for (var i = 0, l = elems.length; i < l; i++) {
-	        nodes[i] = 'n' + elems[i].attributes.ref.value;
-	    }
-	    return nodes;
-	}
+	    var toIndex = favorites.indexOf(beforeItem);
+	    if (after) toIndex += 1;
+	    var newItem = RibbonItem(preset, 'favorite');
+	    favorites.splice(toIndex, 0, newItem);
+	    setFavorites(favorites);
+	  };
 
-	function getNodesJSON(obj) {
-	    var elems = obj.nodes;
-	    var nodes = new Array(elems.length);
-	    for (var i = 0, l = elems.length; i < l; i++) {
-	        nodes[i] = 'n' + elems[i];
-	    }
-	    return nodes;
-	}
+	  _this.toggleFavorite = function (preset) {
+	    var favs = _this.getFavorites();
 
-	function getTags(obj) {
-	    var elems = obj.getElementsByTagName('tag');
-	    var tags = {};
-	    for (var i = 0, l = elems.length; i < l; i++) {
-	        var attrs = elems[i].attributes;
-	        tags[attrs.k.value] = attrs.v.value;
-	    }
+	    var favorite = _this.favoriteMatching(preset);
 
-	    return tags;
-	}
+	    if (favorite) {
+	      favs.splice(favs.indexOf(favorite), 1);
+	    } else {
+	      // only allow 10 favorites
+	      if (favs.length === 10) {
+	        // remove the last favorite (last in, first out)
+	        favs.pop();
+	      } // append array
 
 
-	function getMembers(obj) {
-	    var elems = obj.getElementsByTagName('member');
-	    var members = new Array(elems.length);
-	    for (var i = 0, l = elems.length; i < l; i++) {
-	        var attrs = elems[i].attributes;
-	        members[i] = {
-	            id: attrs.type.value[0] + attrs.ref.value,
-	            type: attrs.type.value,
-	            role: attrs.role.value
-	        };
+	      favs.push(RibbonItem(preset, 'favorite'));
 	    }
-	    return members;
-	}
 
-	function getMembersJSON(obj) {
-	    var elems = obj.members;
-	    var members = new Array(elems.length);
-	    for (var i = 0, l = elems.length; i < l; i++) {
-	        var attrs = elems[i];
-	        members[i] = {
-	            id: attrs.type[0] + attrs.ref,
-	            type: attrs.type,
-	            role: attrs.role
-	        };
+	    setFavorites(favs);
+	  };
+
+	  _this.removeFavorite = function (preset) {
+	    var item = _this.favoriteMatching(preset);
+
+	    if (item) {
+	      var items = _this.getFavorites();
+
+	      items.splice(items.indexOf(item), 1);
+	      setFavorites(items);
 	    }
-	    return members;
-	}
+	  };
 
-	function getVisible(attrs) {
-	    return (!attrs.visible || attrs.visible.value !== 'false');
-	}
+	  _this.getFavorites = function () {
+	    if (!_favorites) {
+	      // fetch from local storage
+	      var rawFavorites = JSON.parse(corePreferences('preset_favorites'));
+
+	      if (!rawFavorites) {
+	        rawFavorites = [];
+	        corePreferences('preset_favorites', JSON.stringify(rawFavorites));
+	      }
 
+	      _favorites = rawFavorites.reduce(function (output, d) {
+	        var item = ribbonItemForMinified(d, 'favorite');
+	        if (item && item.preset.addable()) output.push(item);
+	        return output;
+	      }, []);
+	    }
 
-	function parseComments(comments) {
-	    var parsedComments = [];
-
-	    // for each comment
-	    for (var i = 0; i < comments.length; i++) {
-	        var comment = comments[i];
-	        if (comment.nodeName === 'comment') {
-	            var childNodes = comment.childNodes;
-	            var parsedComment = {};
-
-	            for (var j = 0; j < childNodes.length; j++) {
-	                var node = childNodes[j];
-	                var nodeName = node.nodeName;
-	                if (nodeName === '#text') { continue; }
-	                parsedComment[nodeName] = node.textContent;
-
-	                if (nodeName === 'uid') {
-	                    var uid = node.textContent;
-	                    if (uid && !_userCache.user[uid]) {
-	                        _userCache.toLoad[uid] = true;
-	                    }
-	                }
-	            }
+	    return _favorites;
+	  };
 
-	            if (parsedComment) {
-	                parsedComments.push(parsedComment);
-	            }
-	        }
+	  _this.favoriteMatching = function (preset) {
+	    var favs = _this.getFavorites();
+
+	    for (var index in favs) {
+	      if (favs[index].matches(preset)) {
+	        return favs[index];
+	      }
 	    }
-	    return parsedComments;
-	}
 
+	    return null;
+	  };
 
-	function encodeNoteRtree(note) {
-	    return {
-	        minX: note.loc[0],
-	        minY: note.loc[1],
-	        maxX: note.loc[0],
-	        maxY: note.loc[1],
-	        data: note
-	    };
+	  return utilRebind(_this, dispatch, 'on');
 	}
 
+	function utilTagText(entity) {
+	  var obj = entity && entity.tags || {};
+	  return Object.keys(obj).map(function (k) {
+	    return k + '=' + obj[k];
+	  }).join(', ');
+	}
+	function utilTotalExtent(array, graph) {
+	  var extent = geoExtent();
+	  var val, entity;
 
-	var jsonparsers = {
-
-	    node: function nodeData(obj, uid) {
-	        return new osmNode({
-	            id:  uid,
-	            visible: typeof obj.visible === 'boolean' ? obj.visible : true,
-	            version: obj.version && obj.version.toString(),
-	            changeset: obj.changeset && obj.changeset.toString(),
-	            timestamp: obj.timestamp,
-	            user: obj.user,
-	            uid: obj.uid && obj.uid.toString(),
-	            loc: [parseFloat(obj.lon), parseFloat(obj.lat)],
-	            tags: obj.tags
-	        });
-	    },
+	  for (var i = 0; i < array.length; i++) {
+	    val = array[i];
+	    entity = typeof val === 'string' ? graph.hasEntity(val) : val;
 
-	    way: function wayData(obj, uid) {
-	        return new osmWay({
-	            id:  uid,
-	            visible: typeof obj.visible === 'boolean' ? obj.visible : true,
-	            version: obj.version && obj.version.toString(),
-	            changeset: obj.changeset && obj.changeset.toString(),
-	            timestamp: obj.timestamp,
-	            user: obj.user,
-	            uid: obj.uid && obj.uid.toString(),
-	            tags: obj.tags,
-	            nodes: getNodesJSON(obj)
-	        });
-	    },
+	    if (entity) {
+	      extent._extend(entity.extent(graph));
+	    }
+	  }
 
-	    relation: function relationData(obj, uid) {
-	        return new osmRelation({
-	            id:  uid,
-	            visible: typeof obj.visible === 'boolean' ? obj.visible : true,
-	            version: obj.version && obj.version.toString(),
-	            changeset: obj.changeset && obj.changeset.toString(),
-	            timestamp: obj.timestamp,
-	            user: obj.user,
-	            uid: obj.uid && obj.uid.toString(),
-	            tags: obj.tags,
-	            members: getMembersJSON(obj)
-	        });
+	  return extent;
+	}
+	function utilTagDiff(oldTags, newTags) {
+	  var tagDiff = [];
+	  var keys = utilArrayUnion(Object.keys(oldTags), Object.keys(newTags)).sort();
+	  keys.forEach(function (k) {
+	    var oldVal = oldTags[k];
+	    var newVal = newTags[k];
+
+	    if ((oldVal || oldVal === '') && (newVal === undefined || newVal !== oldVal)) {
+	      tagDiff.push({
+	        type: '-',
+	        key: k,
+	        oldVal: oldVal,
+	        newVal: newVal,
+	        display: '- ' + k + '=' + oldVal
+	      });
 	    }
-	};
 
-	function parseJSON(payload, callback, options) {
-	    options = Object.assign({ skipSeen: true }, options);
-	    if (!payload)  {
-	        return callback({ message: 'No JSON', status: -1 });
+	    if ((newVal || newVal === '') && (oldVal === undefined || newVal !== oldVal)) {
+	      tagDiff.push({
+	        type: '+',
+	        key: k,
+	        oldVal: oldVal,
+	        newVal: newVal,
+	        display: '+ ' + k + '=' + newVal
+	      });
 	    }
+	  });
+	  return tagDiff;
+	}
+	function utilEntitySelector(ids) {
+	  return ids.length ? '.' + ids.join(',.') : 'nothing';
+	} // returns an selector to select entity ids for:
+	//  - entityIDs passed in
+	//  - shallow descendant entityIDs for any of those entities that are relations
 
-	    var json = payload;
-	    if (typeof json !== 'object')
-	       { json = JSON.parse(payload); }
+	function utilEntityOrMemberSelector(ids, graph) {
+	  var seen = new Set(ids);
+	  ids.forEach(collectShallowDescendants);
+	  return utilEntitySelector(Array.from(seen));
+
+	  function collectShallowDescendants(id) {
+	    var entity = graph.hasEntity(id);
+	    if (!entity || entity.type !== 'relation') return;
+	    entity.members.map(function (member) {
+	      return member.id;
+	    }).forEach(function (id) {
+	      seen.add(id);
+	    });
+	  }
+	} // returns an selector to select entity ids for:
+	//  - entityIDs passed in
+	//  - deep descendant entityIDs for any of those entities that are relations
 
-	    if (!json.elements)
-	        { return callback({ message: 'No JSON', status: -1 }); }
+	function utilEntityOrDeepMemberSelector(ids, graph) {
+	  return utilEntitySelector(utilEntityAndDeepMemberIDs(ids, graph));
+	} // returns an selector to select entity ids for:
+	//  - entityIDs passed in
+	//  - deep descendant entityIDs for any of those entities that are relations
 
-	    var children = json.elements;
+	function utilEntityAndDeepMemberIDs(ids, graph) {
+	  var seen = new Set();
+	  ids.forEach(collectDeepDescendants);
+	  return Array.from(seen);
+
+	  function collectDeepDescendants(id) {
+	    if (seen.has(id)) return;
+	    seen.add(id);
+	    var entity = graph.hasEntity(id);
+	    if (!entity || entity.type !== 'relation') return;
+	    entity.members.map(function (member) {
+	      return member.id;
+	    }).forEach(collectDeepDescendants); // recurse
+	  }
+	} // returns an selector to select entity ids for:
+	//  - deep descendant entityIDs for any of those entities that are relations
 
-	    var handle = window.requestIdleCallback(function() {
-	        var results = [];
-	        var result;
-	        for (var i = 0; i < children.length; i++) {
-	            result = parseChild(children[i]);
-	            if (result) { results.push(result); }
-	        }
-	        callback(null, results);
-	    });
+	function utilDeepMemberSelector(ids, graph, skipMultipolgonMembers) {
+	  var idsSet = new Set(ids);
+	  var seen = new Set();
+	  var returners = new Set();
+	  ids.forEach(collectDeepDescendants);
+	  return utilEntitySelector(Array.from(returners));
 
-	    _deferred.add(handle);
+	  function collectDeepDescendants(id) {
+	    if (seen.has(id)) return;
+	    seen.add(id);
 
-	    function parseChild(child) {
-	        var parser = jsonparsers[child.type];
-	        if (!parser) { return null; }
+	    if (!idsSet.has(id)) {
+	      returners.add(id);
+	    }
 
-	        var uid;
+	    var entity = graph.hasEntity(id);
+	    if (!entity || entity.type !== 'relation') return;
+	    if (skipMultipolgonMembers && entity.isMultipolygon()) return;
+	    entity.members.map(function (member) {
+	      return member.id;
+	    }).forEach(collectDeepDescendants); // recurse
+	  }
+	} // Adds or removes highlight styling for the specified entities
 
-	        uid = osmEntity.id.fromOSM(child.type, child.id);
-	        if (options.skipSeen) {
-	            if (_tileCache.seen[uid]) { return null; }  // avoid reparsing a "seen" entity
-	            _tileCache.seen[uid] = true;
-	        }
+	function utilHighlightEntities(ids, highlighted, context) {
+	  context.surface().selectAll(utilEntityOrDeepMemberSelector(ids, context.graph())).classed('highlighted', highlighted);
+	} // returns an Array that is the union of:
+	//  - nodes for any nodeIDs passed in
+	//  - child nodes of any wayIDs passed in
+	//  - descendant member and child nodes of relationIDs passed in
 
-	        return parser(child, uid);
+	function utilGetAllNodes(ids, graph) {
+	  var seen = new Set();
+	  var nodes = new Set();
+	  ids.forEach(collectNodes);
+	  return Array.from(nodes);
+
+	  function collectNodes(id) {
+	    if (seen.has(id)) return;
+	    seen.add(id);
+	    var entity = graph.hasEntity(id);
+	    if (!entity) return;
+
+	    if (entity.type === 'node') {
+	      nodes.add(entity);
+	    } else if (entity.type === 'way') {
+	      entity.nodes.forEach(collectNodes);
+	    } else {
+	      entity.members.map(function (member) {
+	        return member.id;
+	      }).forEach(collectNodes); // recurse
 	    }
+	  }
 	}
+	function utilDisplayName(entity) {
+	  var localizedNameKey = 'name:' + _mainLocalizer.languageCode().toLowerCase();
+	  var name = entity.tags[localizedNameKey] || entity.tags.name || '';
+	  if (name) return name;
+	  var tags = {
+	    direction: entity.tags.direction,
+	    from: entity.tags.from,
+	    network: entity.tags.cycle_network || entity.tags.network,
+	    ref: entity.tags.ref,
+	    to: entity.tags.to,
+	    via: entity.tags.via
+	  };
+	  var keyComponents = [];
 
-	var parsers = {
-	    node: function nodeData(obj, uid) {
-	        var attrs = obj.attributes;
-	        return new osmNode({
-	            id: uid,
-	            visible: getVisible(attrs),
-	            version: attrs.version.value,
-	            changeset: attrs.changeset && attrs.changeset.value,
-	            timestamp: attrs.timestamp && attrs.timestamp.value,
-	            user: attrs.user && attrs.user.value,
-	            uid: attrs.uid && attrs.uid.value,
-	            loc: getLoc(attrs),
-	            tags: getTags(obj)
-	        });
-	    },
-
-	    way: function wayData(obj, uid) {
-	        var attrs = obj.attributes;
-	        return new osmWay({
-	            id: uid,
-	            visible: getVisible(attrs),
-	            version: attrs.version.value,
-	            changeset: attrs.changeset && attrs.changeset.value,
-	            timestamp: attrs.timestamp && attrs.timestamp.value,
-	            user: attrs.user && attrs.user.value,
-	            uid: attrs.uid && attrs.uid.value,
-	            tags: getTags(obj),
-	            nodes: getNodes(obj),
-	        });
-	    },
-
-	    relation: function relationData(obj, uid) {
-	        var attrs = obj.attributes;
-	        return new osmRelation({
-	            id: uid,
-	            visible: getVisible(attrs),
-	            version: attrs.version.value,
-	            changeset: attrs.changeset && attrs.changeset.value,
-	            timestamp: attrs.timestamp && attrs.timestamp.value,
-	            user: attrs.user && attrs.user.value,
-	            uid: attrs.uid && attrs.uid.value,
-	            tags: getTags(obj),
-	            members: getMembers(obj)
-	        });
-	    },
+	  if (tags.network) {
+	    keyComponents.push('network');
+	  }
 
-	    note: function parseNote(obj, uid) {
-	        var attrs = obj.attributes;
-	        var childNodes = obj.childNodes;
-	        var props = {};
+	  if (tags.ref) {
+	    keyComponents.push('ref');
+	  } // Routes may need more disambiguation based on direction or destination
 
-	        props.id = uid;
-	        props.loc = getLoc(attrs);
 
-	        // if notes are coincident, move them apart slightly
-	        var coincident = false;
-	        var epsilon = 0.00001;
-	        do {
-	            if (coincident) {
-	                props.loc = geoVecAdd(props.loc, [epsilon, epsilon]);
-	            }
-	            var bbox = geoExtent(props.loc).bbox();
-	            coincident = _noteCache.rtree.search(bbox).length;
-	        } while (coincident);
-
-	        // parse note contents
-	        for (var i = 0; i < childNodes.length; i++) {
-	            var node = childNodes[i];
-	            var nodeName = node.nodeName;
-	            if (nodeName === '#text') { continue; }
-
-	            // if the element is comments, parse the comments
-	            if (nodeName === 'comments') {
-	                props[nodeName] = parseComments(node.childNodes);
-	            } else {
-	                props[nodeName] = node.textContent;
-	            }
-	        }
+	  if (entity.tags.route) {
+	    if (tags.direction) {
+	      keyComponents.push('direction');
+	    } else if (tags.from && tags.to) {
+	      keyComponents.push('from');
+	      keyComponents.push('to');
 
-	        var note = new osmNote(props);
-	        var item = encodeNoteRtree(note);
-	        _noteCache.note[note.id] = note;
-	        _noteCache.rtree.insert(item);
+	      if (tags.via) {
+	        keyComponents.push('via');
+	      }
+	    }
+	  }
 
-	        return note;
-	    },
+	  if (keyComponents.length) {
+	    name = _t('inspector.display_name.' + keyComponents.join('_'), tags);
+	  }
 
-	    user: function parseUser(obj, uid) {
-	        var attrs = obj.attributes;
-	        var user = {
-	            id: uid,
-	            display_name: attrs.display_name && attrs.display_name.value,
-	            account_created: attrs.account_created && attrs.account_created.value,
-	            changesets_count: '0',
-	            active_blocks: '0'
-	        };
+	  return name;
+	}
+	function utilDisplayNameForPath(entity) {
+	  var name = utilDisplayName(entity);
+	  var isFirefox = utilDetect().browser.toLowerCase().indexOf('firefox') > -1;
+	  var isNewChromium = Number(utilDetect().version.split('.')[0]) >= 96.0;
 
-	        var img = obj.getElementsByTagName('img');
-	        if (img && img[0] && img[0].getAttribute('href')) {
-	            user.image_url = img[0].getAttribute('href');
-	        }
+	  if (!isFirefox && !isNewChromium && name && rtlRegex.test(name)) {
+	    name = fixRTLTextForSvg(name);
+	  }
 
-	        var changesets = obj.getElementsByTagName('changesets');
-	        if (changesets && changesets[0] && changesets[0].getAttribute('count')) {
-	            user.changesets_count = changesets[0].getAttribute('count');
-	        }
+	  return name;
+	}
+	function utilDisplayType(id) {
+	  return {
+	    n: _t('inspector.node'),
+	    w: _t('inspector.way'),
+	    r: _t('inspector.relation')
+	  }[id.charAt(0)];
+	} // `utilDisplayLabel`
+	// Returns a string suitable for display
+	// By default returns something like name/ref, fallback to preset type, fallback to OSM type
+	//   "Main Street" or "Tertiary Road"
+	// If `verbose=true`, include both preset name and feature name.
+	//   "Tertiary Road Main Street"
+	//
 
-	        var blocks = obj.getElementsByTagName('blocks');
-	        if (blocks && blocks[0]) {
-	            var received = blocks[0].getElementsByTagName('received');
-	            if (received && received[0] && received[0].getAttribute('active')) {
-	                user.active_blocks = received[0].getAttribute('active');
-	            }
-	        }
+	function utilDisplayLabel(entity, graphOrGeometry, verbose) {
+	  var result;
+	  var displayName = utilDisplayName(entity);
+	  var preset = typeof graphOrGeometry === 'string' ? _mainPresetIndex.matchTags(entity.tags, graphOrGeometry) : _mainPresetIndex.match(entity, graphOrGeometry);
+	  var presetName = preset && (preset.suggestion ? preset.subtitle() : preset.name());
 
-	        _userCache.user[uid] = user;
-	        delete _userCache.toLoad[uid];
-	        return user;
-	    }
-	};
+	  if (verbose) {
+	    result = [presetName, displayName].filter(Boolean).join(' ');
+	  } else {
+	    result = displayName || presetName;
+	  } // Fallback to the OSM type (node/way/relation)
 
 
-	function parseXML(xml, callback, options) {
-	    options = Object.assign({ skipSeen: true }, options);
-	    if (!xml || !xml.childNodes) {
-	        return callback({ message: 'No XML', status: -1 });
-	    }
+	  return result || utilDisplayType(entity.id);
+	}
+	function utilEntityRoot(entityType) {
+	  return {
+	    node: 'n',
+	    way: 'w',
+	    relation: 'r'
+	  }[entityType];
+	} // Returns a single object containing the tags of all the given entities.
+	// Example:
+	// {
+	//   highway: 'service',
+	//   service: 'parking_aisle'
+	// }
+	//           +
+	// {
+	//   highway: 'service',
+	//   service: 'driveway',
+	//   width: '3'
+	// }
+	//           =
+	// {
+	//   highway: 'service',
+	//   service: [ 'driveway', 'parking_aisle' ],
+	//   width: [ '3', undefined ]
+	// }
 
-	    var root = xml.childNodes[0];
-	    var children = root.childNodes;
+	function utilCombinedTags(entityIDs, graph) {
+	  var tags = {};
+	  var tagCounts = {};
+	  var allKeys = new Set();
+	  var entities = entityIDs.map(function (entityID) {
+	    return graph.hasEntity(entityID);
+	  }).filter(Boolean); // gather the aggregate keys
+
+	  entities.forEach(function (entity) {
+	    var keys = Object.keys(entity.tags).filter(Boolean);
+	    keys.forEach(function (key) {
+	      allKeys.add(key);
+	    });
+	  });
+	  entities.forEach(function (entity) {
+	    allKeys.forEach(function (key) {
+	      var value = entity.tags[key]; // purposely allow `undefined`
 
-	    var handle = window.requestIdleCallback(function() {
-	        var results = [];
-	        var result;
-	        for (var i = 0; i < children.length; i++) {
-	            result = parseChild(children[i]);
-	            if (result) { results.push(result); }
+	      if (!tags.hasOwnProperty(key)) {
+	        // first value, set as raw
+	        tags[key] = value;
+	      } else {
+	        if (!Array.isArray(tags[key])) {
+	          if (tags[key] !== value) {
+	            // first alternate value, replace single value with array
+	            tags[key] = [tags[key], value];
+	          }
+	        } else {
+	          // type is array
+	          if (tags[key].indexOf(value) === -1) {
+	            // subsequent alternate value, add to array
+	            tags[key].push(value);
+	          }
 	        }
-	        callback(null, results);
+	      }
+
+	      var tagHash = key + '=' + value;
+	      if (!tagCounts[tagHash]) tagCounts[tagHash] = 0;
+	      tagCounts[tagHash] += 1;
 	    });
+	  });
 
-	    _deferred.add(handle);
+	  for (var key in tags) {
+	    if (!Array.isArray(tags[key])) continue; // sort values by frequency then alphabetically
 
+	    tags[key] = tags[key].sort(function (val1, val2) {
+	      var key = key; // capture
 
-	    function parseChild(child) {
-	        var parser = parsers[child.nodeName];
-	        if (!parser) { return null; }
+	      var count2 = tagCounts[key + '=' + val2];
+	      var count1 = tagCounts[key + '=' + val1];
 
-	        var uid;
-	        if (child.nodeName === 'user') {
-	            uid = child.attributes.id.value;
-	            if (options.skipSeen && _userCache.user[uid]) {
-	                delete _userCache.toLoad[uid];
-	                return null;
-	            }
+	      if (count2 !== count1) {
+	        return count2 - count1;
+	      }
 
-	        } else if (child.nodeName === 'note') {
-	            uid = child.getElementsByTagName('id')[0].textContent;
+	      if (val2 && val1) {
+	        return val1.localeCompare(val2);
+	      }
 
-	        } else {
-	            uid = osmEntity.id.fromOSM(child.nodeName, child.attributes.id.value);
-	            if (options.skipSeen) {
-	                if (_tileCache.seen[uid]) { return null; }  // avoid reparsing a "seen" entity
-	                _tileCache.seen[uid] = true;
-	            }
-	        }
+	      return val1 ? 1 : -1;
+	    });
+	  }
 
-	        return parser(child, uid);
-	    }
+	  return tags;
 	}
+	function utilStringQs(str) {
+	  var i = 0; // advance past any leading '?' or '#' characters
 
+	  while (i < str.length && (str[i] === '?' || str[i] === '#')) {
+	    i++;
+	  }
 
-	// replace or remove note from rtree
-	function updateRtree$3(item, replace) {
-	    _noteCache.rtree.remove(item, function isEql(a, b) { return a.data.id === b.data.id; });
+	  str = str.slice(i);
+	  return str.split('&').reduce(function (obj, pair) {
+	    var parts = pair.split('=');
 
-	    if (replace) {
-	        _noteCache.rtree.insert(item);
+	    if (parts.length === 2) {
+	      obj[parts[0]] = null === parts[1] ? '' : decodeURIComponent(parts[1]);
 	    }
-	}
-
-
-	function wrapcb(thisArg, callback, cid) {
-	    return function(err, result) {
-	        if (err) {
-	            // 400 Bad Request, 401 Unauthorized, 403 Forbidden..
-	            if (err.status === 400 || err.status === 401 || err.status === 403) {
-	                thisArg.logout();
-	            }
-	            return callback.call(thisArg, err);
 
-	        } else if (thisArg.getConnectionId() !== cid) {
-	            return callback.call(thisArg, { message: 'Connection Switched', status: -1 });
+	    return obj;
+	  }, {});
+	}
+	function utilQsString(obj, noencode) {
+	  // encode everything except special characters used in certain hash parameters:
+	  // "/" in map states, ":", ",", {" and "}" in background
+	  function softEncode(s) {
+	    return encodeURIComponent(s).replace(/(%2F|%3A|%2C|%7B|%7D)/g, decodeURIComponent);
+	  }
 
-	        } else {
-	            return callback.call(thisArg, err, result);
-	        }
-	    };
+	  return Object.keys(obj).sort().map(function (key) {
+	    return encodeURIComponent(key) + '=' + (noencode ? softEncode(obj[key]) : encodeURIComponent(obj[key]));
+	  }).join('&');
 	}
+	function utilPrefixDOMProperty(property) {
+	  var prefixes = ['webkit', 'ms', 'moz', 'o'];
+	  var i = -1;
+	  var n = prefixes.length;
+	  var s = document.body;
+	  if (property in s) return property;
+	  property = property.substr(0, 1).toUpperCase() + property.substr(1);
 
+	  while (++i < n) {
+	    if (prefixes[i] + property in s) {
+	      return prefixes[i] + property;
+	    }
+	  }
 
-	var serviceOsm = {
+	  return false;
+	}
+	function utilPrefixCSSProperty(property) {
+	  var prefixes = ['webkit', 'ms', 'Moz', 'O'];
+	  var i = -1;
+	  var n = prefixes.length;
+	  var s = document.body.style;
 
-	    init: function() {
-	        utilRebind(this, dispatch$6, 'on');
-	    },
+	  if (property.toLowerCase() in s) {
+	    return property.toLowerCase();
+	  }
 
+	  while (++i < n) {
+	    if (prefixes[i] + property in s) {
+	      return '-' + prefixes[i].toLowerCase() + property.replace(/([A-Z])/g, '-$1').toLowerCase();
+	    }
+	  }
 
-	    reset: function() {
-	        Array.from(_deferred).forEach(function(handle) {
-	            window.cancelIdleCallback(handle);
-	            _deferred.delete(handle);
-	        });
+	  return false;
+	}
+	var transformProperty;
+	function utilSetTransform(el, x, y, scale) {
+	  var prop = transformProperty = transformProperty || utilPrefixCSSProperty('Transform');
+	  var translate = utilDetect().opera ? 'translate(' + x + 'px,' + y + 'px)' : 'translate3d(' + x + 'px,' + y + 'px,0)';
+	  return el.style(prop, translate + (scale ? ' scale(' + scale + ')' : ''));
+	} // Calculates Levenshtein distance between two strings
+	// see:  https://en.wikipedia.org/wiki/Levenshtein_distance
+	// first converts the strings to lowercase and replaces diacritic marks with ascii equivalents.
 
-	        _connectionID++;
-	        _userChangesets = undefined;
-	        _userDetails = undefined;
-	        _rateLimitError = undefined;
+	function utilEditDistance(a, b) {
+	  a = remove$6(a.toLowerCase());
+	  b = remove$6(b.toLowerCase());
+	  if (a.length === 0) return b.length;
+	  if (b.length === 0) return a.length;
+	  var matrix = [];
+	  var i, j;
 
-	        Object.values(_tileCache.inflight).forEach(abortRequest$5);
-	        Object.values(_noteCache.inflight).forEach(abortRequest$5);
-	        Object.values(_noteCache.inflightPost).forEach(abortRequest$5);
-	        if (_changeset.inflight) { abortRequest$5(_changeset.inflight); }
+	  for (i = 0; i <= b.length; i++) {
+	    matrix[i] = [i];
+	  }
 
-	        _tileCache = { toLoad: {}, loaded: {}, inflight: {}, seen: {}, rtree: new RBush() };
-	        _noteCache = { toLoad: {}, loaded: {}, inflight: {}, inflightPost: {}, note: {}, closed: {}, rtree: new RBush() };
-	        _userCache = { toLoad: {}, user: {} };
-	        _cachedApiStatus = undefined;
-	        _changeset = {};
+	  for (j = 0; j <= a.length; j++) {
+	    matrix[0][j] = j;
+	  }
 
-	        return this;
-	    },
+	  for (i = 1; i <= b.length; i++) {
+	    for (j = 1; j <= a.length; j++) {
+	      if (b.charAt(i - 1) === a.charAt(j - 1)) {
+	        matrix[i][j] = matrix[i - 1][j - 1];
+	      } else {
+	        matrix[i][j] = Math.min(matrix[i - 1][j - 1] + 1, // substitution
+	        Math.min(matrix[i][j - 1] + 1, // insertion
+	        matrix[i - 1][j] + 1)); // deletion
+	      }
+	    }
+	  }
 
+	  return matrix[b.length][a.length];
+	} // a d3.mouse-alike which
+	// 1. Only works on HTML elements, not SVG
+	// 2. Does not cause style recalculation
 
-	    getConnectionId: function() {
-	        return _connectionID;
-	    },
+	function utilFastMouse(container) {
+	  var rect = container.getBoundingClientRect();
+	  var rectLeft = rect.left;
+	  var rectTop = rect.top;
+	  var clientLeft = +container.clientLeft;
+	  var clientTop = +container.clientTop;
+	  return function (e) {
+	    return [e.clientX - rectLeft - clientLeft, e.clientY - rectTop - clientTop];
+	  };
+	}
+	function utilAsyncMap(inputs, func, callback) {
+	  var remaining = inputs.length;
+	  var results = [];
+	  var errors = [];
+	  inputs.forEach(function (d, i) {
+	    func(d, function done(err, data) {
+	      errors[i] = err;
+	      results[i] = data;
+	      remaining--;
+	      if (!remaining) callback(errors, results);
+	    });
+	  });
+	} // wraps an index to an interval [0..length-1]
 
+	function utilWrap(index, length) {
+	  if (index < 0) {
+	    index += Math.ceil(-index / length) * length;
+	  }
 
-	    changesetURL: function(changesetID) {
-	        return urlroot + '/changeset/' + changesetID;
-	    },
+	  return index % length;
+	}
+	/**
+	 * a replacement for functor
+	 *
+	 * @param {*} value any value
+	 * @returns {Function} a function that returns that value or the value if it's a function
+	 */
 
+	function utilFunctor(value) {
+	  if (typeof value === 'function') return value;
+	  return function () {
+	    return value;
+	  };
+	}
+	function utilNoAuto(selection) {
+	  var isText = selection.size() && selection.node().tagName.toLowerCase() === 'textarea';
+	  return selection // assign 'new-password' even for non-password fields to prevent browsers (Chrome) ignoring 'off'
+	  .attr('autocomplete', 'new-password').attr('autocorrect', 'off').attr('autocapitalize', 'off').attr('spellcheck', isText ? 'true' : 'false');
+	} // https://stackoverflow.com/questions/194846/is-there-any-kind-of-hash-code-function-in-javascript
+	// https://werxltd.com/wp/2010/05/13/javascript-implementation-of-javas-string-hashcode-method/
 
-	    changesetsURL: function(center, zoom) {
-	        var precision = Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
-	        return urlroot + '/history#map=' +
-	            Math.floor(zoom) + '/' +
-	            center[1].toFixed(precision) + '/' +
-	            center[0].toFixed(precision);
-	    },
+	function utilHashcode(str) {
+	  var hash = 0;
 
+	  if (str.length === 0) {
+	    return hash;
+	  }
 
-	    entityURL: function(entity) {
-	        return urlroot + '/' + entity.type + '/' + entity.osmId();
-	    },
+	  for (var i = 0; i < str.length; i++) {
+	    var _char = str.charCodeAt(i);
 
+	    hash = (hash << 5) - hash + _char;
+	    hash = hash & hash; // Convert to 32bit integer
+	  }
 
-	    historyURL: function(entity) {
-	        return urlroot + '/' + entity.type + '/' + entity.osmId() + '/history';
-	    },
+	  return hash;
+	} // Returns version of `str` with all runs of special characters replaced by `_`;
+	// suitable for HTML ids, classes, selectors, etc.
 
+	function utilSafeClassName(str) {
+	  return str.toLowerCase().replace(/[^a-z0-9]+/g, '_');
+	} // Returns string based on `val` that is highly unlikely to collide with an id
+	// used previously or that's present elsewhere in the document. Useful for preventing
+	// browser-provided autofills or when embedding iD on pages with unknown elements.
 
-	    userURL: function(username) {
-	        return urlroot + '/user/' + username;
-	    },
+	function utilUniqueDomId(val) {
+	  return 'ideditor-' + utilSafeClassName(val.toString()) + '-' + new Date().getTime().toString();
+	} // Returns the length of `str` in unicode characters. This can be less than
+	// `String.length()` since a single unicode character can be composed of multiple
+	// JavaScript UTF-16 code units.
 
+	function utilUnicodeCharsCount(str) {
+	  // Native ES2015 implementations of `Array.from` split strings into unicode characters
+	  return Array.from(str).length;
+	} // Returns a new string representing `str` cut from its start to `limit` length
+	// in unicode characters. Note that this runs the risk of splitting graphemes.
 
-	    noteURL: function(note) {
-	        return urlroot + '/note/' + note.id;
-	    },
+	function utilUnicodeCharsTruncated(str, limit) {
+	  return Array.from(str).slice(0, limit).join('');
+	}
 
+	function osmEntity(attrs) {
+	  // For prototypal inheritance.
+	  if (this instanceof osmEntity) return; // Create the appropriate subtype.
 
-	    noteReportURL: function(note) {
-	        return urlroot + '/reports/new?reportable_type=Note&reportable_id=' + note.id;
-	    },
+	  if (attrs && attrs.type) {
+	    return osmEntity[attrs.type].apply(this, arguments);
+	  } else if (attrs && attrs.id) {
+	    return osmEntity[osmEntity.id.type(attrs.id)].apply(this, arguments);
+	  } // Initialize a generic Entity (used only in tests).
 
 
-	    // Generic method to load data from the OSM API
-	    // Can handle either auth or unauth calls.
-	    loadFromAPI: function(path, callback, options) {
-	        options = Object.assign({ skipSeen: true }, options);
-	        var that = this;
-	        var cid = _connectionID;
+	  return new osmEntity().initialize(arguments);
+	}
 
-	        function done(err, payload) {
-	            if (that.getConnectionId() !== cid) {
-	                if (callback) { callback({ message: 'Connection Switched', status: -1 }); }
-	                return;
-	            }
+	osmEntity.id = function (type) {
+	  return osmEntity.id.fromOSM(type, osmEntity.id.next[type]--);
+	};
 
-	            var isAuthenticated = that.authenticated();
+	osmEntity.id.next = {
+	  changeset: -1,
+	  node: -1,
+	  way: -1,
+	  relation: -1
+	};
 
-	            // 400 Bad Request, 401 Unauthorized, 403 Forbidden
-	            // Logout and retry the request..
-	            if (isAuthenticated && err && err.status &&
-	                    (err.status === 400 || err.status === 401 || err.status === 403)) {
-	                that.logout();
-	                that.loadFromAPI(path, callback, options);
+	osmEntity.id.fromOSM = function (type, id) {
+	  return type[0] + id;
+	};
 
-	            // else, no retry..
-	            } else {
-	                // 509 Bandwidth Limit Exceeded, 429 Too Many Requests
-	                // Set the rateLimitError flag and trigger a warning..
-	                if (!isAuthenticated && !_rateLimitError && err && err.status &&
-	                        (err.status === 509 || err.status === 429)) {
-	                    _rateLimitError = err;
-	                    dispatch$6.call('change');
-	                    that.reloadApiStatus();
-
-	                } else if ((err && _cachedApiStatus === 'online') ||
-	                    (!err && _cachedApiStatus !== 'online')) {
-	                    // If the response's error state doesn't match the status,
-	                    // it's likely we lost or gained the connection so reload the status
-	                    that.reloadApiStatus();
-	                }
+	osmEntity.id.toOSM = function (id) {
+	  return id.slice(1);
+	};
 
-	                if (callback) {
-	                    if (err) {
-	                        return callback(err);
-	                    } else {
-	                        if (path.indexOf('.json') !== -1) {
-	                            return parseJSON(payload, callback, options);
-	                        } else {
-	                            return parseXML(payload, callback, options);
-	                        }
-	                    }
-	                }
-	            }
-	        }
+	osmEntity.id.type = function (id) {
+	  return {
+	    'c': 'changeset',
+	    'n': 'node',
+	    'w': 'way',
+	    'r': 'relation'
+	  }[id[0]];
+	}; // A function suitable for use as the second argument to d3.selection#data().
 
-	        if (this.authenticated()) {
-	            return oauth.xhr({ method: 'GET', path: path }, done);
-	        } else {
-	            var url = urlroot + path;
-	            var controller = new AbortController();
-	            d3_json(url, { signal: controller.signal })
-	                .then(function(data) {
-	                    done(null, data);
-	                })
-	                .catch(function(err) {
-	                    if (err.name === 'AbortError') { return; }
-	                    // d3-fetch includes status in the error message,
-	                    // but we can't access the response itself
-	                    // https://github.com/d3/d3-fetch/issues/27
-	                    var match = err.message.match(/^\d{3}/);
-	                    if (match) {
-	                        done({ status: +match[0], statusText: err.message });
-	                    } else {
-	                        done(err.message);
-	                    }
-	                });
-	            return controller;
-	        }
-	    },
 
+	osmEntity.key = function (entity) {
+	  return entity.id + 'v' + (entity.v || 0);
+	};
 
-	    // Load a single entity by id (ways and relations use the `/full` call)
-	    // GET /api/0.6/node/#id
-	    // GET /api/0.6/[way|relation]/#id/full
-	    loadEntity: function(id, callback) {
-	        var type = osmEntity.id.type(id);
-	        var osmID = osmEntity.id.toOSM(id);
-	        var options = { skipSeen: false };
+	var _deprecatedTagValuesByKey;
 
-	        this.loadFromAPI(
-	            '/api/0.6/' + type + '/' + osmID + (type !== 'node' ? '/full' : '') + '.json',
-	            function(err, entities) {
-	                if (callback) { callback(err, { data: entities }); }
-	            },
-	            options
-	        );
-	    },
+	osmEntity.deprecatedTagValuesByKey = function (dataDeprecated) {
+	  if (!_deprecatedTagValuesByKey) {
+	    _deprecatedTagValuesByKey = {};
+	    dataDeprecated.forEach(function (d) {
+	      var oldKeys = Object.keys(d.old);
 
+	      if (oldKeys.length === 1) {
+	        var oldKey = oldKeys[0];
+	        var oldValue = d.old[oldKey];
 
-	    // Load a single entity with a specific version
-	    // GET /api/0.6/[node|way|relation]/#id/#version
-	    loadEntityVersion: function(id, version, callback) {
-	        var type = osmEntity.id.type(id);
-	        var osmID = osmEntity.id.toOSM(id);
-	        var options = { skipSeen: false };
+	        if (oldValue !== '*') {
+	          if (!_deprecatedTagValuesByKey[oldKey]) {
+	            _deprecatedTagValuesByKey[oldKey] = [oldValue];
+	          } else {
+	            _deprecatedTagValuesByKey[oldKey].push(oldValue);
+	          }
+	        }
+	      }
+	    });
+	  }
 
-	        this.loadFromAPI(
-	            '/api/0.6/' + type + '/' + osmID + '/' + version + '.json',
-	            function(err, entities) {
-	                if (callback) { callback(err, { data: entities }); }
-	            },
-	            options
-	        );
-	    },
+	  return _deprecatedTagValuesByKey;
+	};
 
+	osmEntity.prototype = {
+	  tags: {},
+	  initialize: function initialize(sources) {
+	    for (var i = 0; i < sources.length; ++i) {
+	      var source = sources[i];
+
+	      for (var prop in source) {
+	        if (Object.prototype.hasOwnProperty.call(source, prop)) {
+	          if (source[prop] === undefined) {
+	            delete this[prop];
+	          } else {
+	            this[prop] = source[prop];
+	          }
+	        }
+	      }
+	    }
 
-	    // Load multiple entities in chunks
-	    // (note: callback may be called multiple times)
-	    // Unlike `loadEntity`, child nodes and members are not fetched
-	    // GET /api/0.6/[nodes|ways|relations]?#parameters
-	    loadMultiple: function(ids, callback) {
-	        var that = this;
-	        var groups = utilArrayGroupBy(utilArrayUniq(ids), osmEntity.id.type);
-
-	        Object.keys(groups).forEach(function(k) {
-	            var type = k + 's';   // nodes, ways, relations
-	            var osmIDs = groups[k].map(function(id) { return osmEntity.id.toOSM(id); });
-	            var options = { skipSeen: false };
-
-	            utilArrayChunk(osmIDs, 150).forEach(function(arr) {
-	                that.loadFromAPI(
-	                    '/api/0.6/' + type + '.json?' + type + '=' + arr.join(),
-	                    function(err, entities) {
-	                        if (callback) { callback(err, { data: entities }); }
-	                    },
-	                    options
-	                );
-	            });
-	        });
-	    },
+	    if (!this.id && this.type) {
+	      this.id = osmEntity.id(this.type);
+	    }
 
+	    if (!this.hasOwnProperty('visible')) {
+	      this.visible = true;
+	    }
 
-	    // Create, upload, and close a changeset
-	    // PUT /api/0.6/changeset/create
-	    // POST /api/0.6/changeset/#id/upload
-	    // PUT /api/0.6/changeset/#id/close
-	    putChangeset: function(changeset, changes, callback) {
-	        var cid = _connectionID;
+	    if (debug) {
+	      Object.freeze(this);
+	      Object.freeze(this.tags);
+	      if (this.loc) Object.freeze(this.loc);
+	      if (this.nodes) Object.freeze(this.nodes);
+	      if (this.members) Object.freeze(this.members);
+	    }
 
-	        if (_changeset.inflight) {
-	            return callback({ message: 'Changeset already inflight', status: -2 }, changeset);
+	    return this;
+	  },
+	  copy: function copy(resolver, copies) {
+	    if (copies[this.id]) return copies[this.id];
+	    var copy = osmEntity(this, {
+	      id: undefined,
+	      user: undefined,
+	      version: undefined
+	    });
+	    copies[this.id] = copy;
+	    return copy;
+	  },
+	  osmId: function osmId() {
+	    return osmEntity.id.toOSM(this.id);
+	  },
+	  isNew: function isNew() {
+	    return this.osmId() < 0;
+	  },
+	  update: function update(attrs) {
+	    return osmEntity(this, attrs, {
+	      v: 1 + (this.v || 0)
+	    });
+	  },
+	  mergeTags: function mergeTags(tags) {
+	    var merged = Object.assign({}, this.tags); // shallow copy
 
-	        } else if (_changeset.open) {   // reuse existing open changeset..
-	            return createdChangeset.call(this, null, _changeset.open);
+	    var changed = false;
 
-	        } else {   // Open a new changeset..
-	            var options = {
-	                method: 'PUT',
-	                path: '/api/0.6/changeset/create',
-	                options: { header: { 'Content-Type': 'text/xml' } },
-	                content: JXON.stringify(changeset.asJXON())
-	            };
-	            _changeset.inflight = oauth.xhr(
-	                options,
-	                wrapcb(this, createdChangeset, cid)
-	            );
-	        }
+	    for (var k in tags) {
+	      var t1 = merged[k];
+	      var t2 = tags[k];
+
+	      if (!t1) {
+	        changed = true;
+	        merged[k] = t2;
+	      } else if (t1 !== t2) {
+	        changed = true;
+	        merged[k] = utilUnicodeCharsTruncated(utilArrayUnion(t1.split(/;\s*/), t2.split(/;\s*/)).join(';'), 255 // avoid exceeding character limit; see also services/osm.js -> maxCharsForTagValue()
+	        );
+	      }
+	    }
 
+	    return changed ? this.update({
+	      tags: merged
+	    }) : this;
+	  },
+	  intersects: function intersects(extent, resolver) {
+	    return this.extent(resolver).intersects(extent);
+	  },
+	  hasNonGeometryTags: function hasNonGeometryTags() {
+	    return Object.keys(this.tags).some(function (k) {
+	      return k !== 'area';
+	    });
+	  },
+	  hasParentRelations: function hasParentRelations(resolver) {
+	    return resolver.parentRelations(this).length > 0;
+	  },
+	  hasInterestingTags: function hasInterestingTags() {
+	    return Object.keys(this.tags).some(osmIsInterestingTag);
+	  },
+	  isHighwayIntersection: function isHighwayIntersection() {
+	    return false;
+	  },
+	  isDegenerate: function isDegenerate() {
+	    return true;
+	  },
+	  deprecatedTags: function deprecatedTags(dataDeprecated) {
+	    var tags = this.tags; // if there are no tags, none can be deprecated
+
+	    if (Object.keys(tags).length === 0) return [];
+	    var deprecated = [];
+	    dataDeprecated.forEach(function (d) {
+	      var oldKeys = Object.keys(d.old);
+
+	      if (d.replace) {
+	        var hasExistingValues = Object.keys(d.replace).some(function (replaceKey) {
+	          if (!tags[replaceKey] || d.old[replaceKey]) return false;
+	          var replaceValue = d.replace[replaceKey];
+	          if (replaceValue === '*') return false;
+	          if (replaceValue === tags[replaceKey]) return false;
+	          return true;
+	        }); // don't flag deprecated tags if the upgrade path would overwrite existing data - #7843
 
-	        function createdChangeset(err, changesetID) {
-	            _changeset.inflight = null;
-	            if (err) { return callback(err, changeset); }
+	        if (hasExistingValues) return;
+	      }
 
-	            _changeset.open = changesetID;
-	            changeset = changeset.update({ id: changesetID });
+	      var matchesDeprecatedTags = oldKeys.every(function (oldKey) {
+	        if (!tags[oldKey]) return false;
+	        if (d.old[oldKey] === '*') return true;
+	        if (d.old[oldKey] === tags[oldKey]) return true;
+	        var vals = tags[oldKey].split(';').filter(Boolean);
 
-	            // Upload the changeset..
-	            var options = {
-	                method: 'POST',
-	                path: '/api/0.6/changeset/' + changesetID + '/upload',
-	                options: { header: { 'Content-Type': 'text/xml' } },
-	                content: JXON.stringify(changeset.osmChangeJXON(changes))
-	            };
-	            _changeset.inflight = oauth.xhr(
-	                options,
-	                wrapcb(this, uploadedChangeset, cid)
-	            );
-	        }
-
-
-	        function uploadedChangeset(err) {
-	            _changeset.inflight = null;
-	            if (err) { return callback(err, changeset); }
-
-	            // Upload was successful, safe to call the callback.
-	            // Add delay to allow for postgres replication #1646 #2678
-	            window.setTimeout(function() { callback(null, changeset); }, 2500);
-	            _changeset.open = null;
-
-	            // At this point, we don't really care if the connection was switched..
-	            // Only try to close the changeset if we're still talking to the same server.
-	            if (this.getConnectionId() === cid) {
-	                // Still attempt to close changeset, but ignore response because #2667
-	                oauth.xhr({
-	                    method: 'PUT',
-	                    path: '/api/0.6/changeset/' + changeset.id + '/close',
-	                    options: { header: { 'Content-Type': 'text/xml' } }
-	                }, function() { return true; });
+	        if (vals.length === 0) {
+	          return false;
+	        } else if (vals.length > 1) {
+	          return vals.indexOf(d.old[oldKey]) !== -1;
+	        } else {
+	          if (tags[oldKey] === d.old[oldKey]) {
+	            if (d.replace && d.old[oldKey] === d.replace[oldKey]) {
+	              var replaceKeys = Object.keys(d.replace);
+	              return !replaceKeys.every(function (replaceKey) {
+	                return tags[replaceKey] === d.replace[replaceKey];
+	              });
+	            } else {
+	              return true;
 	            }
+	          }
 	        }
-	    },
 
+	        return false;
+	      });
 
-	    // Load multiple users in chunks
-	    // (note: callback may be called multiple times)
-	    // GET /api/0.6/users?users=#id1,#id2,...,#idn
-	    loadUsers: function(uids, callback) {
-	        var toLoad = [];
-	        var cached = [];
+	      if (matchesDeprecatedTags) {
+	        deprecated.push(d);
+	      }
+	    });
+	    return deprecated;
+	  }
+	};
 
-	        utilArrayUniq(uids).forEach(function(uid) {
-	            if (_userCache.user[uid]) {
-	                delete _userCache.toLoad[uid];
-	                cached.push(_userCache.user[uid]);
-	            } else {
-	                toLoad.push(uid);
-	            }
-	        });
+	function osmLanes(entity) {
+	  if (entity.type !== 'way') return null;
+	  if (!entity.tags.highway) return null;
+	  var tags = entity.tags;
+	  var isOneWay = entity.isOneWay();
+	  var laneCount = getLaneCount(tags, isOneWay);
+	  var maxspeed = parseMaxspeed(tags);
+	  var laneDirections = parseLaneDirections(tags, isOneWay, laneCount);
+	  var forward = laneDirections.forward;
+	  var backward = laneDirections.backward;
+	  var bothways = laneDirections.bothways; // parse the piped string 'x|y|z' format
+
+	  var turnLanes = {};
+	  turnLanes.unspecified = parseTurnLanes(tags['turn:lanes']);
+	  turnLanes.forward = parseTurnLanes(tags['turn:lanes:forward']);
+	  turnLanes.backward = parseTurnLanes(tags['turn:lanes:backward']);
+	  var maxspeedLanes = {};
+	  maxspeedLanes.unspecified = parseMaxspeedLanes(tags['maxspeed:lanes'], maxspeed);
+	  maxspeedLanes.forward = parseMaxspeedLanes(tags['maxspeed:lanes:forward'], maxspeed);
+	  maxspeedLanes.backward = parseMaxspeedLanes(tags['maxspeed:lanes:backward'], maxspeed);
+	  var psvLanes = {};
+	  psvLanes.unspecified = parseMiscLanes(tags['psv:lanes']);
+	  psvLanes.forward = parseMiscLanes(tags['psv:lanes:forward']);
+	  psvLanes.backward = parseMiscLanes(tags['psv:lanes:backward']);
+	  var busLanes = {};
+	  busLanes.unspecified = parseMiscLanes(tags['bus:lanes']);
+	  busLanes.forward = parseMiscLanes(tags['bus:lanes:forward']);
+	  busLanes.backward = parseMiscLanes(tags['bus:lanes:backward']);
+	  var taxiLanes = {};
+	  taxiLanes.unspecified = parseMiscLanes(tags['taxi:lanes']);
+	  taxiLanes.forward = parseMiscLanes(tags['taxi:lanes:forward']);
+	  taxiLanes.backward = parseMiscLanes(tags['taxi:lanes:backward']);
+	  var hovLanes = {};
+	  hovLanes.unspecified = parseMiscLanes(tags['hov:lanes']);
+	  hovLanes.forward = parseMiscLanes(tags['hov:lanes:forward']);
+	  hovLanes.backward = parseMiscLanes(tags['hov:lanes:backward']);
+	  var hgvLanes = {};
+	  hgvLanes.unspecified = parseMiscLanes(tags['hgv:lanes']);
+	  hgvLanes.forward = parseMiscLanes(tags['hgv:lanes:forward']);
+	  hgvLanes.backward = parseMiscLanes(tags['hgv:lanes:backward']);
+	  var bicyclewayLanes = {};
+	  bicyclewayLanes.unspecified = parseBicycleWay(tags['bicycleway:lanes']);
+	  bicyclewayLanes.forward = parseBicycleWay(tags['bicycleway:lanes:forward']);
+	  bicyclewayLanes.backward = parseBicycleWay(tags['bicycleway:lanes:backward']);
+	  var lanesObj = {
+	    forward: [],
+	    backward: [],
+	    unspecified: []
+	  }; // map forward/backward/unspecified of each lane type to lanesObj
+
+	  mapToLanesObj(lanesObj, turnLanes, 'turnLane');
+	  mapToLanesObj(lanesObj, maxspeedLanes, 'maxspeed');
+	  mapToLanesObj(lanesObj, psvLanes, 'psv');
+	  mapToLanesObj(lanesObj, busLanes, 'bus');
+	  mapToLanesObj(lanesObj, taxiLanes, 'taxi');
+	  mapToLanesObj(lanesObj, hovLanes, 'hov');
+	  mapToLanesObj(lanesObj, hgvLanes, 'hgv');
+	  mapToLanesObj(lanesObj, bicyclewayLanes, 'bicycleway');
+	  return {
+	    metadata: {
+	      count: laneCount,
+	      oneway: isOneWay,
+	      forward: forward,
+	      backward: backward,
+	      bothways: bothways,
+	      turnLanes: turnLanes,
+	      maxspeed: maxspeed,
+	      maxspeedLanes: maxspeedLanes,
+	      psvLanes: psvLanes,
+	      busLanes: busLanes,
+	      taxiLanes: taxiLanes,
+	      hovLanes: hovLanes,
+	      hgvLanes: hgvLanes,
+	      bicyclewayLanes: bicyclewayLanes
+	    },
+	    lanes: lanesObj
+	  };
+	}
 
-	        if (cached.length || !this.authenticated()) {
-	            callback(undefined, cached);
-	            if (!this.authenticated()) { return; }  // require auth
-	        }
+	function getLaneCount(tags, isOneWay) {
+	  var count;
 
-	        utilArrayChunk(toLoad, 150).forEach(function(arr) {
-	            oauth.xhr(
-	                { method: 'GET', path: '/api/0.6/users?users=' + arr.join() },
-	                wrapcb(this, done, _connectionID)
-	            );
-	        }.bind(this));
+	  if (tags.lanes) {
+	    count = parseInt(tags.lanes, 10);
 
-	        function done(err, xml) {
-	            if (err) { return callback(err); }
+	    if (count > 0) {
+	      return count;
+	    }
+	  }
 
-	            var options = { skipSeen: true };
-	            return parseXML(xml, function(err, results) {
-	                if (err) {
-	                    return callback(err);
-	                } else {
-	                    return callback(undefined, results);
-	                }
-	            }, options);
-	        }
-	    },
+	  switch (tags.highway) {
+	    case 'trunk':
+	    case 'motorway':
+	      count = isOneWay ? 2 : 4;
+	      break;
 
+	    default:
+	      count = isOneWay ? 1 : 2;
+	      break;
+	  }
 
-	    // Load a given user by id
-	    // GET /api/0.6/user/#id
-	    loadUser: function(uid, callback) {
-	        if (_userCache.user[uid] || !this.authenticated()) {   // require auth
-	            delete _userCache.toLoad[uid];
-	            return callback(undefined, _userCache.user[uid]);
-	        }
+	  return count;
+	}
 
-	        oauth.xhr(
-	            { method: 'GET', path: '/api/0.6/user/' + uid },
-	            wrapcb(this, done, _connectionID)
-	        );
+	function parseMaxspeed(tags) {
+	  var maxspeed = tags.maxspeed;
+	  if (!maxspeed) return;
+	  var maxspeedRegex = /^([0-9][\.0-9]+?)(?:[ ]?(?:km\/h|kmh|kph|mph|knots))?$/;
+	  if (!maxspeedRegex.test(maxspeed)) return;
+	  return parseInt(maxspeed, 10);
+	}
 
-	        function done(err, xml) {
-	            if (err) { return callback(err); }
+	function parseLaneDirections(tags, isOneWay, laneCount) {
+	  var forward = parseInt(tags['lanes:forward'], 10);
+	  var backward = parseInt(tags['lanes:backward'], 10);
+	  var bothways = parseInt(tags['lanes:both_ways'], 10) > 0 ? 1 : 0;
 
-	            var options = { skipSeen: true };
-	            return parseXML(xml, function(err, results) {
-	                if (err) {
-	                    return callback(err);
-	                } else {
-	                    return callback(undefined, results[0]);
-	                }
-	            }, options);
-	        }
-	    },
+	  if (parseInt(tags.oneway, 10) === -1) {
+	    forward = 0;
+	    bothways = 0;
+	    backward = laneCount;
+	  } else if (isOneWay) {
+	    forward = laneCount;
+	    bothways = 0;
+	    backward = 0;
+	  } else if (isNaN(forward) && isNaN(backward)) {
+	    backward = Math.floor((laneCount - bothways) / 2);
+	    forward = laneCount - bothways - backward;
+	  } else if (isNaN(forward)) {
+	    if (backward > laneCount - bothways) {
+	      backward = laneCount - bothways;
+	    }
 
+	    forward = laneCount - bothways - backward;
+	  } else if (isNaN(backward)) {
+	    if (forward > laneCount - bothways) {
+	      forward = laneCount - bothways;
+	    }
 
-	    // Load the details of the logged-in user
-	    // GET /api/0.6/user/details
-	    userDetails: function(callback) {
-	        if (_userDetails) {    // retrieve cached
-	            return callback(undefined, _userDetails);
-	        }
+	    backward = laneCount - bothways - forward;
+	  }
 
-	        oauth.xhr(
-	            { method: 'GET', path: '/api/0.6/user/details' },
-	            wrapcb(this, done, _connectionID)
-	        );
+	  return {
+	    forward: forward,
+	    backward: backward,
+	    bothways: bothways
+	  };
+	}
 
-	        function done(err, xml) {
-	            if (err) { return callback(err); }
+	function parseTurnLanes(tag) {
+	  if (!tag) return;
+	  var validValues = ['left', 'slight_left', 'sharp_left', 'through', 'right', 'slight_right', 'sharp_right', 'reverse', 'merge_to_left', 'merge_to_right', 'none'];
+	  return tag.split('|').map(function (s) {
+	    if (s === '') s = 'none';
+	    return s.split(';').map(function (d) {
+	      return validValues.indexOf(d) === -1 ? 'unknown' : d;
+	    });
+	  });
+	}
 
-	            var options = { skipSeen: false };
-	            return parseXML(xml, function(err, results) {
-	                if (err) {
-	                    return callback(err);
-	                } else {
-	                    _userDetails = results[0];
-	                    return callback(undefined, _userDetails);
-	                }
-	            }, options);
-	        }
-	    },
+	function parseMaxspeedLanes(tag, maxspeed) {
+	  if (!tag) return;
+	  return tag.split('|').map(function (s) {
+	    if (s === 'none') return s;
+	    var m = parseInt(s, 10);
+	    if (s === '' || m === maxspeed) return null;
+	    return isNaN(m) ? 'unknown' : m;
+	  });
+	}
 
+	function parseMiscLanes(tag) {
+	  if (!tag) return;
+	  var validValues = ['yes', 'no', 'designated'];
+	  return tag.split('|').map(function (s) {
+	    if (s === '') s = 'no';
+	    return validValues.indexOf(s) === -1 ? 'unknown' : s;
+	  });
+	}
 
-	    // Load previous changesets for the logged in user
-	    // GET /api/0.6/changesets?user=#id
-	    userChangesets: function(callback) {
-	        if (_userChangesets) {    // retrieve cached
-	            return callback(undefined, _userChangesets);
-	        }
+	function parseBicycleWay(tag) {
+	  if (!tag) return;
+	  var validValues = ['yes', 'no', 'designated', 'lane'];
+	  return tag.split('|').map(function (s) {
+	    if (s === '') s = 'no';
+	    return validValues.indexOf(s) === -1 ? 'unknown' : s;
+	  });
+	}
 
-	        this.userDetails(
-	            wrapcb(this, gotDetails, _connectionID)
-	        );
+	function mapToLanesObj(lanesObj, data, key) {
+	  if (data.forward) {
+	    data.forward.forEach(function (l, i) {
+	      if (!lanesObj.forward[i]) lanesObj.forward[i] = {};
+	      lanesObj.forward[i][key] = l;
+	    });
+	  }
+
+	  if (data.backward) {
+	    data.backward.forEach(function (l, i) {
+	      if (!lanesObj.backward[i]) lanesObj.backward[i] = {};
+	      lanesObj.backward[i][key] = l;
+	    });
+	  }
+
+	  if (data.unspecified) {
+	    data.unspecified.forEach(function (l, i) {
+	      if (!lanesObj.unspecified[i]) lanesObj.unspecified[i] = {};
+	      lanesObj.unspecified[i][key] = l;
+	    });
+	  }
+	}
 
+	function osmWay() {
+	  if (!(this instanceof osmWay)) {
+	    return new osmWay().initialize(arguments);
+	  } else if (arguments.length) {
+	    this.initialize(arguments);
+	  }
+	}
+	osmEntity.way = osmWay;
+	osmWay.prototype = Object.create(osmEntity.prototype);
+	Object.assign(osmWay.prototype, {
+	  type: 'way',
+	  nodes: [],
+	  copy: function copy(resolver, copies) {
+	    if (copies[this.id]) return copies[this.id];
+	    var copy = osmEntity.prototype.copy.call(this, resolver, copies);
+	    var nodes = this.nodes.map(function (id) {
+	      return resolver.entity(id).copy(resolver, copies).id;
+	    });
+	    copy = copy.update({
+	      nodes: nodes
+	    });
+	    copies[this.id] = copy;
+	    return copy;
+	  },
+	  extent: function extent(resolver) {
+	    return resolver["transient"](this, 'extent', function () {
+	      var extent = geoExtent();
 
-	        function gotDetails(err, user) {
-	            if (err) { return callback(err); }
+	      for (var i = 0; i < this.nodes.length; i++) {
+	        var node = resolver.hasEntity(this.nodes[i]);
 
-	            oauth.xhr(
-	                { method: 'GET', path: '/api/0.6/changesets?user=' + user.id },
-	                wrapcb(this, done, _connectionID)
-	            );
+	        if (node) {
+	          extent._extend(node.extent());
 	        }
+	      }
 
-	        function done(err, xml) {
-	            if (err) { return callback(err); }
+	      return extent;
+	    });
+	  },
+	  first: function first() {
+	    return this.nodes[0];
+	  },
+	  last: function last() {
+	    return this.nodes[this.nodes.length - 1];
+	  },
+	  contains: function contains(node) {
+	    return this.nodes.indexOf(node) >= 0;
+	  },
+	  affix: function affix(node) {
+	    if (this.nodes[0] === node) return 'prefix';
+	    if (this.nodes[this.nodes.length - 1] === node) return 'suffix';
+	  },
+	  layer: function layer() {
+	    // explicit layer tag, clamp between -10, 10..
+	    if (isFinite(this.tags.layer)) {
+	      return Math.max(-10, Math.min(+this.tags.layer, 10));
+	    } // implied layer tag..
+
+
+	    if (this.tags.covered === 'yes') return -1;
+	    if (this.tags.location === 'overground') return 1;
+	    if (this.tags.location === 'underground') return -1;
+	    if (this.tags.location === 'underwater') return -10;
+	    if (this.tags.power === 'line') return 10;
+	    if (this.tags.power === 'minor_line') return 10;
+	    if (this.tags.aerialway) return 10;
+	    if (this.tags.bridge) return 1;
+	    if (this.tags.cutting) return -1;
+	    if (this.tags.tunnel) return -1;
+	    if (this.tags.waterway) return -1;
+	    if (this.tags.man_made === 'pipeline') return -10;
+	    if (this.tags.boundary) return -10;
+	    return 0;
+	  },
+	  // the approximate width of the line based on its tags except its `width` tag
+	  impliedLineWidthMeters: function impliedLineWidthMeters() {
+	    var averageWidths = {
+	      highway: {
+	        // width is for single lane
+	        motorway: 5,
+	        motorway_link: 5,
+	        trunk: 4.5,
+	        trunk_link: 4.5,
+	        primary: 4,
+	        secondary: 4,
+	        tertiary: 4,
+	        primary_link: 4,
+	        secondary_link: 4,
+	        tertiary_link: 4,
+	        unclassified: 4,
+	        road: 4,
+	        living_street: 4,
+	        bus_guideway: 4,
+	        pedestrian: 4,
+	        residential: 3.5,
+	        service: 3.5,
+	        track: 3,
+	        cycleway: 2.5,
+	        bridleway: 2,
+	        corridor: 2,
+	        steps: 2,
+	        path: 1.5,
+	        footway: 1.5
+	      },
+	      railway: {
+	        // width includes ties and rail bed, not just track gauge
+	        rail: 2.5,
+	        light_rail: 2.5,
+	        tram: 2.5,
+	        subway: 2.5,
+	        monorail: 2.5,
+	        funicular: 2.5,
+	        disused: 2.5,
+	        preserved: 2.5,
+	        miniature: 1.5,
+	        narrow_gauge: 1.5
+	      },
+	      waterway: {
+	        river: 50,
+	        canal: 25,
+	        stream: 5,
+	        tidal_channel: 5,
+	        fish_pass: 2.5,
+	        drain: 2.5,
+	        ditch: 1.5
+	      }
+	    };
 
-	            _userChangesets = Array.prototype.map.call(
-	                xml.getElementsByTagName('changeset'),
-	                function (changeset) { return { tags: getTags(changeset) }; }
-	            ).filter(function (changeset) {
-	                var comment = changeset.tags.comment;
-	                return comment && comment !== '';
-	            });
+	    for (var key in averageWidths) {
+	      if (this.tags[key] && averageWidths[key][this.tags[key]]) {
+	        var width = averageWidths[key][this.tags[key]];
 
-	            return callback(undefined, _userChangesets);
+	        if (key === 'highway') {
+	          var laneCount = this.tags.lanes && parseInt(this.tags.lanes, 10);
+	          if (!laneCount) laneCount = this.isOneWay() ? 1 : 2;
+	          return width * laneCount;
 	        }
-	    },
-
 
-	    // Fetch the status of the OSM API
-	    // GET /api/capabilities
-	    status: function(callback) {
-	        var url = urlroot + '/api/capabilities';
-	        var errback = wrapcb(this, done, _connectionID);
-	        d3_xml(url)
-	            .then(function(data) { errback(null, data); })
-	            .catch(function(err) { errback(err.message); });
+	        return width;
+	      }
+	    }
 
-	        function done(err, xml) {
-	            if (err) {
-	                // the status is null if no response could be retrieved
-	                return callback(err, null);
-	            }
+	    return null;
+	  },
+	  isOneWay: function isOneWay() {
+	    // explicit oneway tag..
+	    var values = {
+	      'yes': true,
+	      '1': true,
+	      '-1': true,
+	      'reversible': true,
+	      'alternating': true,
+	      'no': false,
+	      '0': false
+	    };
 
-	            // update blocklists
-	            var elements = xml.getElementsByTagName('blacklist');
-	            var regexes = [];
-	            for (var i = 0; i < elements.length; i++) {
-	                var regexString = elements[i].getAttribute('regex');  // needs unencode?
-	                if (regexString) {
-	                    try {
-	                        var regex = new RegExp(regexString);
-	                        regexes.push(regex);
-	                    } catch (e) {
-	                        /* noop */
-	                    }
-	                }
-	            }
-	            if (regexes.length) {
-	                _imageryBlocklists = regexes;
-	            }
+	    if (values[this.tags.oneway] !== undefined) {
+	      return values[this.tags.oneway];
+	    } // implied oneway tag..
 
-	            if (_rateLimitError) {
-	                return callback(_rateLimitError, 'rateLimited');
-	            } else {
-	                var waynodes = xml.getElementsByTagName('waynodes');
-	                var maxWayNodes = waynodes.length && parseInt(waynodes[0].getAttribute('maximum'), 10);
-	                if (maxWayNodes && isFinite(maxWayNodes)) { _maxWayNodes = maxWayNodes; }
 
-	                var apiStatus = xml.getElementsByTagName('status');
-	                var val = apiStatus[0].getAttribute('api');
-	                return callback(undefined, val);
-	            }
-	        }
-	    },
+	    for (var key in this.tags) {
+	      if (key in osmOneWayTags && this.tags[key] in osmOneWayTags[key]) {
+	        return true;
+	      }
+	    }
 
-	    // Calls `status` and dispatches an `apiStatusChange` event if the returned
-	    // status differs from the cached status.
-	    reloadApiStatus: function() {
-	        // throttle to avoid unnecessary API calls
-	        if (!this.throttledReloadApiStatus) {
-	            var that = this;
-	            this.throttledReloadApiStatus = throttle(function() {
-	                that.status(function(err, status) {
-	                    if (status !== _cachedApiStatus) {
-	                        _cachedApiStatus = status;
-	                        dispatch$6.call('apiStatusChange', that, err, status);
-	                    }
-	                });
-	            }, 500);
+	    return false;
+	  },
+	  // Some identifier for tag that implies that this way is "sided",
+	  // i.e. the right side is the 'inside' (e.g. the right side of a
+	  // natural=cliff is lower).
+	  sidednessIdentifier: function sidednessIdentifier() {
+	    for (var key in this.tags) {
+	      var value = this.tags[key];
+
+	      if (key in osmRightSideIsInsideTags && value in osmRightSideIsInsideTags[key]) {
+	        if (osmRightSideIsInsideTags[key][value] === true) {
+	          return key;
+	        } else {
+	          // if the map's value is something other than a
+	          // literal true, we should use it so we can
+	          // special case some keys (e.g. natural=coastline
+	          // is handled differently to other naturals).
+	          return osmRightSideIsInsideTags[key][value];
 	        }
-	        this.throttledReloadApiStatus();
-	    },
+	      }
+	    }
 
+	    return null;
+	  },
+	  isSided: function isSided() {
+	    if (this.tags.two_sided === 'yes') {
+	      return false;
+	    }
 
-	    // Returns the maximum number of nodes a single way can have
-	    maxWayNodes: function() {
-	        return _maxWayNodes;
-	    },
+	    return this.sidednessIdentifier() !== null;
+	  },
+	  lanes: function lanes() {
+	    return osmLanes(this);
+	  },
+	  isClosed: function isClosed() {
+	    return this.nodes.length > 1 && this.first() === this.last();
+	  },
+	  isConvex: function isConvex(resolver) {
+	    if (!this.isClosed() || this.isDegenerate()) return null;
+	    var nodes = utilArrayUniq(resolver.childNodes(this));
+	    var coords = nodes.map(function (n) {
+	      return n.loc;
+	    });
+	    var curr = 0;
+	    var prev = 0;
 
+	    for (var i = 0; i < coords.length; i++) {
+	      var o = coords[(i + 1) % coords.length];
+	      var a = coords[i];
+	      var b = coords[(i + 2) % coords.length];
+	      var res = geoVecCross(a, b, o);
+	      curr = res > 0 ? 1 : res < 0 ? -1 : 0;
 
-	    // Load data (entities) from the API in tiles
-	    // GET /api/0.6/map?bbox=
-	    loadTiles: function(projection, callback) {
-	        if (_off) { return; }
+	      if (curr === 0) {
+	        continue;
+	      } else if (prev && curr !== prev) {
+	        return false;
+	      }
 
-	        // determine the needed tiles to cover the view
-	        var tiles = tiler$5.zoomExtent([_tileZoom$3, _tileZoom$3]).getTiles(projection);
+	      prev = curr;
+	    }
 
-	        // abort inflight requests that are no longer needed
-	        var hadRequests = hasInflightRequests(_tileCache);
-	        abortUnwantedRequests$3(_tileCache, tiles);
-	        if (hadRequests && !hasInflightRequests(_tileCache)) {
-	            dispatch$6.call('loaded');    // stop the spinner
-	        }
+	    return true;
+	  },
+	  // returns an object with the tag that implies this is an area, if any
+	  tagSuggestingArea: function tagSuggestingArea() {
+	    return osmTagSuggestingArea(this.tags);
+	  },
+	  isArea: function isArea() {
+	    if (this.tags.area === 'yes') return true;
+	    if (!this.isClosed() || this.tags.area === 'no') return false;
+	    return this.tagSuggestingArea() !== null;
+	  },
+	  isDegenerate: function isDegenerate() {
+	    return new Set(this.nodes).size < (this.isArea() ? 3 : 2);
+	  },
+	  areAdjacent: function areAdjacent(n1, n2) {
+	    for (var i = 0; i < this.nodes.length; i++) {
+	      if (this.nodes[i] === n1) {
+	        if (this.nodes[i - 1] === n2) return true;
+	        if (this.nodes[i + 1] === n2) return true;
+	      }
+	    }
 
-	        // issue new requests..
-	        tiles.forEach(function(tile) {
-	            this.loadTile(tile, callback);
-	        }, this);
-	    },
+	    return false;
+	  },
+	  geometry: function geometry(graph) {
+	    return graph["transient"](this, 'geometry', function () {
+	      return this.isArea() ? 'area' : 'line';
+	    });
+	  },
+	  // returns an array of objects representing the segments between the nodes in this way
+	  segments: function segments(graph) {
+	    function segmentExtent(graph) {
+	      var n1 = graph.hasEntity(this.nodes[0]);
+	      var n2 = graph.hasEntity(this.nodes[1]);
+	      return n1 && n2 && geoExtent([[Math.min(n1.loc[0], n2.loc[0]), Math.min(n1.loc[1], n2.loc[1])], [Math.max(n1.loc[0], n2.loc[0]), Math.max(n1.loc[1], n2.loc[1])]]);
+	    }
+
+	    return graph["transient"](this, 'segments', function () {
+	      var segments = [];
+
+	      for (var i = 0; i < this.nodes.length - 1; i++) {
+	        segments.push({
+	          id: this.id + '-' + i,
+	          wayId: this.id,
+	          index: i,
+	          nodes: [this.nodes[i], this.nodes[i + 1]],
+	          extent: segmentExtent
+	        });
+	      }
 
+	      return segments;
+	    });
+	  },
+	  // If this way is not closed, append the beginning node to the end of the nodelist to close it.
+	  close: function close() {
+	    if (this.isClosed() || !this.nodes.length) return this;
+	    var nodes = this.nodes.slice();
+	    nodes = nodes.filter(noRepeatNodes);
+	    nodes.push(nodes[0]);
+	    return this.update({
+	      nodes: nodes
+	    });
+	  },
+	  // If this way is closed, remove any connector nodes from the end of the nodelist to unclose it.
+	  unclose: function unclose() {
+	    if (!this.isClosed()) return this;
+	    var nodes = this.nodes.slice();
+	    var connector = this.first();
+	    var i = nodes.length - 1; // remove trailing connectors..
 
-	    // Load a single data tile
-	    // GET /api/0.6/map?bbox=
-	    loadTile: function(tile, callback) {
-	        if (_off) { return; }
-	        if (_tileCache.loaded[tile.id] || _tileCache.inflight[tile.id]) { return; }
+	    while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
+	      nodes.splice(i, 1);
+	      i = nodes.length - 1;
+	    }
 
-	        if (!hasInflightRequests(_tileCache)) {
-	            dispatch$6.call('loading');   // start the spinner
-	        }
+	    nodes = nodes.filter(noRepeatNodes);
+	    return this.update({
+	      nodes: nodes
+	    });
+	  },
+	  // Adds a node (id) in front of the node which is currently at position index.
+	  // If index is undefined, the node will be added to the end of the way for linear ways,
+	  //   or just before the final connecting node for circular ways.
+	  // Consecutive duplicates are eliminated including existing ones.
+	  // Circularity is always preserved when adding a node.
+	  addNode: function addNode(id, index) {
+	    var nodes = this.nodes.slice();
+	    var isClosed = this.isClosed();
+	    var max = isClosed ? nodes.length - 1 : nodes.length;
 
-	        var path = '/api/0.6/map.json?bbox=';
-	        var options = { skipSeen: true };
+	    if (index === undefined) {
+	      index = max;
+	    }
 
-	        _tileCache.inflight[tile.id] = this.loadFromAPI(
-	            path + tile.extent.toParam(),
-	            tileCallback,
-	            options
-	        );
+	    if (index < 0 || index > max) {
+	      throw new RangeError('index ' + index + ' out of range 0..' + max);
+	    } // If this is a closed way, remove all connector nodes except the first one
+	    // (there may be duplicates) and adjust index if necessary..
 
-	        function tileCallback(err, parsed) {
-	            delete _tileCache.inflight[tile.id];
-	            if (!err) {
-	                delete _tileCache.toLoad[tile.id];
-	                _tileCache.loaded[tile.id] = true;
-	                var bbox = tile.extent.bbox();
-	                bbox.id = tile.id;
-	                _tileCache.rtree.insert(bbox);
-	            }
-	            if (callback) {
-	                callback(err, Object.assign({ data: parsed }, tile));
-	            }
-	            if (!hasInflightRequests(_tileCache)) {
-	                dispatch$6.call('loaded');     // stop the spinner
-	            }
-	        }
-	    },
 
+	    if (isClosed) {
+	      var connector = this.first(); // leading connectors..
 
-	    isDataLoaded: function(loc) {
-	        var bbox = { minX: loc[0], minY: loc[1], maxX: loc[0], maxY: loc[1] };
-	        return _tileCache.rtree.collides(bbox);
-	    },
+	      var i = 1;
 
+	      while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
+	        nodes.splice(i, 1);
+	        if (index > i) index--;
+	      } // trailing connectors..
 
-	    // load the tile that covers the given `loc`
-	    loadTileAtLoc: function(loc, callback) {
-	        // Back off if the toLoad queue is filling up.. re #6417
-	        // (Currently `loadTileAtLoc` requests are considered low priority - used by operations to
-	        // let users safely edit geometries which extend to unloaded tiles.  We can drop some.)
-	        if (Object.keys(_tileCache.toLoad).length > 50) { return; }
 
-	        var k = geoZoomToScale(_tileZoom$3 + 1);
-	        var offset = geoRawMercator().scale(k)(loc);
-	        var projection = geoRawMercator().transform({ k: k, x: -offset[0], y: -offset[1] });
-	        var tiles = tiler$5.zoomExtent([_tileZoom$3, _tileZoom$3]).getTiles(projection);
+	      i = nodes.length - 1;
 
-	        tiles.forEach(function(tile) {
-	            if (_tileCache.toLoad[tile.id] || _tileCache.loaded[tile.id] || _tileCache.inflight[tile.id]) { return; }
+	      while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
+	        nodes.splice(i, 1);
+	        if (index > i) index--;
+	        i = nodes.length - 1;
+	      }
+	    }
 
-	            _tileCache.toLoad[tile.id] = true;
-	            this.loadTile(tile, callback);
-	        }, this);
-	    },
+	    nodes.splice(index, 0, id);
+	    nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
 
+	    if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+	      nodes.push(nodes[0]);
+	    }
 
-	    // Load notes from the API in tiles
-	    // GET /api/0.6/notes?bbox=
-	    loadNotes: function(projection, noteOptions) {
-	        noteOptions = Object.assign({ limit: 10000, closed: 7 }, noteOptions);
-	        if (_off) { return; }
+	    return this.update({
+	      nodes: nodes
+	    });
+	  },
+	  // Replaces the node which is currently at position index with the given node (id).
+	  // Consecutive duplicates are eliminated including existing ones.
+	  // Circularity is preserved when updating a node.
+	  updateNode: function updateNode(id, index) {
+	    var nodes = this.nodes.slice();
+	    var isClosed = this.isClosed();
+	    var max = nodes.length - 1;
 
-	        var that = this;
-	        var path = '/api/0.6/notes?limit=' + noteOptions.limit + '&closed=' + noteOptions.closed + '&bbox=';
-	        var throttleLoadUsers = throttle(function() {
-	            var uids = Object.keys(_userCache.toLoad);
-	            if (!uids.length) { return; }
-	            that.loadUsers(uids, function() {});  // eagerly load user details
-	        }, 750);
-
-	        // determine the needed tiles to cover the view
-	        var tiles = tiler$5.zoomExtent([_noteZoom, _noteZoom]).getTiles(projection);
-
-	        // abort inflight requests that are no longer needed
-	        abortUnwantedRequests$3(_noteCache, tiles);
-
-	        // issue new requests..
-	        tiles.forEach(function(tile) {
-	            if (_noteCache.loaded[tile.id] || _noteCache.inflight[tile.id]) { return; }
-
-	            var options = { skipSeen: false };
-	            _noteCache.inflight[tile.id] = that.loadFromAPI(
-	                path + tile.extent.toParam(),
-	                function(err) {
-	                    delete _noteCache.inflight[tile.id];
-	                    if (!err) {
-	                        _noteCache.loaded[tile.id] = true;
-	                    }
-	                    throttleLoadUsers();
-	                    dispatch$6.call('loadedNotes');
-	                },
-	                options
-	            );
-	        });
-	    },
+	    if (index === undefined || index < 0 || index > max) {
+	      throw new RangeError('index ' + index + ' out of range 0..' + max);
+	    } // If this is a closed way, remove all connector nodes except the first one
+	    // (there may be duplicates) and adjust index if necessary..
 
 
-	    // Create a note
-	    // POST /api/0.6/notes?params
-	    postNoteCreate: function(note, callback) {
-	        if (!this.authenticated()) {
-	            return callback({ message: 'Not Authenticated', status: -3 }, note);
-	        }
-	        if (_noteCache.inflightPost[note.id]) {
-	            return callback({ message: 'Note update already inflight', status: -2 }, note);
-	        }
+	    if (isClosed) {
+	      var connector = this.first(); // leading connectors..
 
-	        if (!note.loc[0] || !note.loc[1] || !note.newComment) { return; } // location & description required
+	      var i = 1;
 
-	        var comment = note.newComment;
-	        if (note.newCategory && note.newCategory !== 'None') { comment += ' #' + note.newCategory; }
+	      while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
+	        nodes.splice(i, 1);
+	        if (index > i) index--;
+	      } // trailing connectors..
 
-	        var path = '/api/0.6/notes?' + utilQsString({ lon: note.loc[0], lat: note.loc[1], text: comment });
 
-	        _noteCache.inflightPost[note.id] = oauth.xhr(
-	            { method: 'POST', path: path },
-	            wrapcb(this, done, _connectionID)
-	        );
+	      i = nodes.length - 1;
 
+	      while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
+	        nodes.splice(i, 1);
+	        if (index === i) index = 0; // update leading connector instead
 
-	        function done(err, xml) {
-	            delete _noteCache.inflightPost[note.id];
-	            if (err) { return callback(err); }
+	        i = nodes.length - 1;
+	      }
+	    }
 
-	            // we get the updated note back, remove from caches and reparse..
-	            this.removeNote(note);
+	    nodes.splice(index, 1, id);
+	    nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
 
-	            var options = { skipSeen: false };
-	            return parseXML(xml, function(err, results) {
-	                if (err) {
-	                    return callback(err);
-	                } else {
-	                    return callback(undefined, results[0]);
-	                }
-	            }, options);
-	        }
-	    },
+	    if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+	      nodes.push(nodes[0]);
+	    }
 
+	    return this.update({
+	      nodes: nodes
+	    });
+	  },
+	  // Replaces each occurrence of node id needle with replacement.
+	  // Consecutive duplicates are eliminated including existing ones.
+	  // Circularity is preserved.
+	  replaceNode: function replaceNode(needleID, replacementID) {
+	    var nodes = this.nodes.slice();
+	    var isClosed = this.isClosed();
+
+	    for (var i = 0; i < nodes.length; i++) {
+	      if (nodes[i] === needleID) {
+	        nodes[i] = replacementID;
+	      }
+	    }
 
-	    // Update a note
-	    // POST /api/0.6/notes/#id/comment?text=comment
-	    // POST /api/0.6/notes/#id/close?text=comment
-	    // POST /api/0.6/notes/#id/reopen?text=comment
-	    postNoteUpdate: function(note, newStatus, callback) {
-	        if (!this.authenticated()) {
-	            return callback({ message: 'Not Authenticated', status: -3 }, note);
-	        }
-	        if (_noteCache.inflightPost[note.id]) {
-	            return callback({ message: 'Note update already inflight', status: -2 }, note);
-	        }
+	    nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
 
-	        var action;
-	        if (note.status !== 'closed' && newStatus === 'closed') {
-	            action = 'close';
-	        } else if (note.status !== 'open' && newStatus === 'open') {
-	            action = 'reopen';
-	        } else {
-	            action = 'comment';
-	            if (!note.newComment) { return; } // when commenting, comment required
-	        }
+	    if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+	      nodes.push(nodes[0]);
+	    }
 
-	        var path = '/api/0.6/notes/' + note.id + '/' + action;
-	        if (note.newComment) {
-	            path += '?' + utilQsString({ text: note.newComment });
-	        }
+	    return this.update({
+	      nodes: nodes
+	    });
+	  },
+	  // Removes each occurrence of node id.
+	  // Consecutive duplicates are eliminated including existing ones.
+	  // Circularity is preserved.
+	  removeNode: function removeNode(id) {
+	    var nodes = this.nodes.slice();
+	    var isClosed = this.isClosed();
+	    nodes = nodes.filter(function (node) {
+	      return node !== id;
+	    }).filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
+
+	    if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+	      nodes.push(nodes[0]);
+	    }
+
+	    return this.update({
+	      nodes: nodes
+	    });
+	  },
+	  asJXON: function asJXON(changeset_id) {
+	    var r = {
+	      way: {
+	        '@id': this.osmId(),
+	        '@version': this.version || 0,
+	        nd: this.nodes.map(function (id) {
+	          return {
+	            keyAttributes: {
+	              ref: osmEntity.id.toOSM(id)
+	            }
+	          };
+	        }, this),
+	        tag: Object.keys(this.tags).map(function (k) {
+	          return {
+	            keyAttributes: {
+	              k: k,
+	              v: this.tags[k]
+	            }
+	          };
+	        }, this)
+	      }
+	    };
 
-	        _noteCache.inflightPost[note.id] = oauth.xhr(
-	            { method: 'POST', path: path },
-	            wrapcb(this, done, _connectionID)
-	        );
+	    if (changeset_id) {
+	      r.way['@changeset'] = changeset_id;
+	    }
 
+	    return r;
+	  },
+	  asGeoJSON: function asGeoJSON(resolver) {
+	    return resolver["transient"](this, 'GeoJSON', function () {
+	      var coordinates = resolver.childNodes(this).map(function (n) {
+	        return n.loc;
+	      });
 
-	        function done(err, xml) {
-	            delete _noteCache.inflightPost[note.id];
-	            if (err) { return callback(err); }
+	      if (this.isArea() && this.isClosed()) {
+	        return {
+	          type: 'Polygon',
+	          coordinates: [coordinates]
+	        };
+	      } else {
+	        return {
+	          type: 'LineString',
+	          coordinates: coordinates
+	        };
+	      }
+	    });
+	  },
+	  area: function area(resolver) {
+	    return resolver["transient"](this, 'area', function () {
+	      var nodes = resolver.childNodes(this);
+	      var json = {
+	        type: 'Polygon',
+	        coordinates: [nodes.map(function (n) {
+	          return n.loc;
+	        })]
+	      };
 
-	            // we get the updated note back, remove from caches and reparse..
-	            this.removeNote(note);
+	      if (!this.isClosed() && nodes.length) {
+	        json.coordinates[0].push(nodes[0].loc);
+	      }
 
-	            // update closed note cache - used to populate `closed:note` changeset tag
-	            if (action === 'close') {
-	                _noteCache.closed[note.id] = true;
-	            } else if (action === 'reopen') {
-	                delete _noteCache.closed[note.id];
-	            }
+	      var area = d3_geoArea(json); // Heuristic for detecting counterclockwise winding order. Assumes
+	      // that OpenStreetMap polygons are not hemisphere-spanning.
 
-	            var options = { skipSeen: false };
-	            return parseXML(xml, function(err, results) {
-	                if (err) {
-	                    return callback(err);
-	                } else {
-	                    return callback(undefined, results[0]);
-	                }
-	            }, options);
-	        }
-	    },
+	      if (area > 2 * Math.PI) {
+	        json.coordinates[0] = json.coordinates[0].reverse();
+	        area = d3_geoArea(json);
+	      }
 
+	      return isNaN(area) ? 0 : area;
+	    });
+	  }
+	}); // Filter function to eliminate consecutive duplicates.
 
-	    switch: function(options) {
-	        urlroot = options.urlroot;
+	function noRepeatNodes(node, i, arr) {
+	  return i === 0 || node !== arr[i - 1];
+	}
 
-	        oauth.options(Object.assign({
-	            url: urlroot,
-	            loading: authLoading,
-	            done: authDone
-	        }, options));
+	//
+	// 1. Relation tagged with `type=multipolygon` and no interesting tags.
+	// 2. One and only one member with the `outer` role. Must be a way with interesting tags.
+	// 3. No members without a role.
+	//
+	// Old multipolygons are no longer recommended but are still rendered as areas by iD.
 
-	        this.reset();
-	        this.userChangesets(function() {});  // eagerly load user details/changesets
-	        dispatch$6.call('change');
-	        return this;
-	    },
+	function osmOldMultipolygonOuterMemberOfRelation(entity, graph) {
+	  if (entity.type !== 'relation' || !entity.isMultipolygon() || Object.keys(entity.tags).filter(osmIsInterestingTag).length > 1) {
+	    return false;
+	  }
 
+	  var outerMember;
 
-	    toggle: function(val) {
-	        _off = !val;
-	        return this;
-	    },
+	  for (var memberIndex in entity.members) {
+	    var member = entity.members[memberIndex];
 
+	    if (!member.role || member.role === 'outer') {
+	      if (outerMember) return false;
+	      if (member.type !== 'way') return false;
+	      if (!graph.hasEntity(member.id)) return false;
+	      outerMember = graph.entity(member.id);
 
-	    isChangesetInflight: function() {
-	        return !!_changeset.inflight;
-	    },
+	      if (Object.keys(outerMember.tags).filter(osmIsInterestingTag).length === 0) {
+	        return false;
+	      }
+	    }
+	  }
 
+	  return outerMember;
+	} // For fixing up rendering of multipolygons with tags on the outer member.
+	// https://github.com/openstreetmap/iD/issues/613
 
-	    // get/set cached data
-	    // This is used to save/restore the state when entering/exiting the walkthrough
-	    // Also used for testing purposes.
-	    caches: function(obj) {
-	        function cloneCache(source) {
-	            var target = {};
-	            Object.keys(source).forEach(function(k) {
-	                if (k === 'rtree') {
-	                    target.rtree = new RBush().fromJSON(source.rtree.toJSON());  // clone rbush
-	                } else if (k === 'note') {
-	                    target.note = {};
-	                    Object.keys(source.note).forEach(function(id) {
-	                        target.note[id] = osmNote(source.note[id]);   // copy notes
-	                    });
-	                } else {
-	                    target[k] = JSON.parse(JSON.stringify(source[k]));   // clone deep
-	                }
-	            });
-	            return target;
-	        }
+	function osmIsOldMultipolygonOuterMember(entity, graph) {
+	  if (entity.type !== 'way' || Object.keys(entity.tags).filter(osmIsInterestingTag).length === 0) {
+	    return false;
+	  }
 
-	        if (!arguments.length) {
-	            return {
-	                tile: cloneCache(_tileCache),
-	                note: cloneCache(_noteCache),
-	                user: cloneCache(_userCache)
-	            };
-	        }
+	  var parents = graph.parentRelations(entity);
+	  if (parents.length !== 1) return false;
+	  var parent = parents[0];
 
-	        // access caches directly for testing (e.g., loading notes rtree)
-	        if (obj === 'get') {
-	            return {
-	                tile: _tileCache,
-	                note: _noteCache,
-	                user: _userCache
-	            };
-	        }
+	  if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1) {
+	    return false;
+	  }
 
-	        if (obj.tile) {
-	            _tileCache = obj.tile;
-	            _tileCache.inflight = {};
-	        }
-	        if (obj.note) {
-	            _noteCache = obj.note;
-	            _noteCache.inflight = {};
-	            _noteCache.inflightPost = {};
-	        }
-	        if (obj.user) {
-	            _userCache = obj.user;
-	        }
+	  var members = parent.members,
+	      member;
 
-	        return this;
-	    },
+	  for (var i = 0; i < members.length; i++) {
+	    member = members[i];
 
+	    if (member.id === entity.id && member.role && member.role !== 'outer') {
+	      // Not outer member
+	      return false;
+	    }
 
-	    logout: function() {
-	        _userChangesets = undefined;
-	        _userDetails = undefined;
-	        oauth.logout();
-	        dispatch$6.call('change');
-	        return this;
-	    },
+	    if (member.id !== entity.id && (!member.role || member.role === 'outer')) {
+	      // Not a simple multipolygon
+	      return false;
+	    }
+	  }
 
+	  return parent;
+	}
+	function osmOldMultipolygonOuterMember(entity, graph) {
+	  if (entity.type !== 'way') return false;
+	  var parents = graph.parentRelations(entity);
+	  if (parents.length !== 1) return false;
+	  var parent = parents[0];
 
-	    authenticated: function() {
-	        return oauth.authenticated();
-	    },
+	  if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1) {
+	    return false;
+	  }
 
+	  var members = parent.members,
+	      member,
+	      outerMember;
 
-	    authenticate: function(callback) {
-	        var that = this;
-	        var cid = _connectionID;
-	        _userChangesets = undefined;
-	        _userDetails = undefined;
+	  for (var i = 0; i < members.length; i++) {
+	    member = members[i];
 
-	        function done(err, res) {
-	            if (err) {
-	                if (callback) { callback(err); }
-	                return;
-	            }
-	            if (that.getConnectionId() !== cid) {
-	                if (callback) { callback({ message: 'Connection Switched', status: -1 }); }
-	                return;
-	            }
-	            _rateLimitError = undefined;
-	            dispatch$6.call('change');
-	            if (callback) { callback(err, res); }
-	            that.userChangesets(function() {});  // eagerly load user details/changesets
-	        }
+	    if (!member.role || member.role === 'outer') {
+	      if (outerMember) return false; // Not a simple multipolygon
 
-	        return oauth.authenticate(done);
-	    },
+	      outerMember = member;
+	    }
+	  }
 
+	  if (!outerMember) return false;
+	  var outerEntity = graph.hasEntity(outerMember.id);
 
-	    imageryBlocklists: function() {
-	        return _imageryBlocklists;
-	    },
+	  if (!outerEntity || !Object.keys(outerEntity.tags).filter(osmIsInterestingTag).length) {
+	    return false;
+	  }
 
+	  return outerEntity;
+	} // Join `toJoin` array into sequences of connecting ways.
+	// Segments which share identical start/end nodes will, as much as possible,
+	// be connected with each other.
+	//
+	// The return value is a nested array. Each constituent array contains elements
+	// of `toJoin` which have been determined to connect.
+	//
+	// Each consitituent array also has a `nodes` property whose value is an
+	// ordered array of member nodes, with appropriate order reversal and
+	// start/end coordinate de-duplication.
+	//
+	// Members of `toJoin` must have, at minimum, `type` and `id` properties.
+	// Thus either an array of `osmWay`s or a relation member array may be used.
+	//
+	// If an member is an `osmWay`, its tags and childnodes may be reversed via
+	// `actionReverse` in the output.
+	//
+	// The returned sequences array also has an `actions` array property, containing
+	// any reversal actions that should be applied to the graph, should the calling
+	// code attempt to actually join the given ways.
+	//
+	// Incomplete members (those for which `graph.hasEntity(element.id)` returns
+	// false) and non-way members are ignored.
+	//
 
-	    tileZoom: function(val) {
-	        if (!arguments.length) { return _tileZoom$3; }
-	        _tileZoom$3 = val;
-	        return this;
-	    },
+	function osmJoinWays(toJoin, graph) {
+	  function resolve(member) {
+	    return graph.childNodes(graph.entity(member.id));
+	  }
 
+	  function reverse(item) {
+	    var action = actionReverse(item.id, {
+	      reverseOneway: true
+	    });
+	    sequences.actions.push(action);
+	    return item instanceof osmWay ? action(graph).entity(item.id) : item;
+	  } // make a copy containing only the items to join
 
-	    // get all cached notes covering the viewport
-	    notes: function(projection) {
-	        var viewport = projection.clipExtent();
-	        var min = [viewport[0][0], viewport[1][1]];
-	        var max = [viewport[1][0], viewport[0][1]];
-	        var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
 
-	        return _noteCache.rtree.search(bbox)
-	            .map(function(d) { return d.data; });
-	    },
+	  toJoin = toJoin.filter(function (member) {
+	    return member.type === 'way' && graph.hasEntity(member.id);
+	  }); // Are the things we are joining relation members or `osmWays`?
+	  // If `osmWays`, skip the "prefer a forward path" code below (see #4872)
 
+	  var i;
+	  var joinAsMembers = true;
 
-	    // get a single note from the cache
-	    getNote: function(id) {
-	        return _noteCache.note[id];
-	    },
+	  for (i = 0; i < toJoin.length; i++) {
+	    if (toJoin[i] instanceof osmWay) {
+	      joinAsMembers = false;
+	      break;
+	    }
+	  }
 
+	  var sequences = [];
+	  sequences.actions = [];
 
-	    // remove a single note from the cache
-	    removeNote: function(note) {
-	        if (!(note instanceof osmNote) || !note.id) { return; }
+	  while (toJoin.length) {
+	    // start a new sequence
+	    var item = toJoin.shift();
+	    var currWays = [item];
+	    var currNodes = resolve(item).slice(); // add to it
 
-	        delete _noteCache.note[note.id];
-	        updateRtree$3(encodeNoteRtree(note), false);  // false = remove
-	    },
+	    while (toJoin.length) {
+	      var start = currNodes[0];
+	      var end = currNodes[currNodes.length - 1];
+	      var fn = null;
+	      var nodes = null; // Find the next way/member to join.
+
+	      for (i = 0; i < toJoin.length; i++) {
+	        item = toJoin[i];
+	        nodes = resolve(item); // (for member ordering only, not way ordering - see #4872)
+	        // Strongly prefer to generate a forward path that preserves the order
+	        // of the members array. For multipolygons and most relations, member
+	        // order does not matter - but for routes, it does. (see #4589)
+	        // If we started this sequence backwards (i.e. next member way attaches to
+	        // the start node and not the end node), reverse the initial way before continuing.
+
+	        if (joinAsMembers && currWays.length === 1 && nodes[0] !== end && nodes[nodes.length - 1] !== end && (nodes[nodes.length - 1] === start || nodes[0] === start)) {
+	          currWays[0] = reverse(currWays[0]);
+	          currNodes.reverse();
+	          start = currNodes[0];
+	          end = currNodes[currNodes.length - 1];
+	        }
+
+	        if (nodes[0] === end) {
+	          fn = currNodes.push; // join to end
+
+	          nodes = nodes.slice(1);
+	          break;
+	        } else if (nodes[nodes.length - 1] === end) {
+	          fn = currNodes.push; // join to end
 
+	          nodes = nodes.slice(0, -1).reverse();
+	          item = reverse(item);
+	          break;
+	        } else if (nodes[nodes.length - 1] === start) {
+	          fn = currNodes.unshift; // join to beginning
 
-	    // replace a single note in the cache
-	    replaceNote: function(note) {
-	        if (!(note instanceof osmNote) || !note.id) { return; }
+	          nodes = nodes.slice(0, -1);
+	          break;
+	        } else if (nodes[0] === start) {
+	          fn = currNodes.unshift; // join to beginning
 
-	        _noteCache.note[note.id] = note;
-	        updateRtree$3(encodeNoteRtree(note), true);  // true = replace
-	        return note;
-	    },
+	          nodes = nodes.slice(1).reverse();
+	          item = reverse(item);
+	          break;
+	        } else {
+	          fn = nodes = null;
+	        }
+	      }
 
+	      if (!nodes) {
+	        // couldn't find a joinable way/member
+	        break;
+	      }
 
-	    // Get an array of note IDs closed during this session.
-	    // Used to populate `closed:note` changeset tag
-	    getClosedIDs: function() {
-	        return Object.keys(_noteCache.closed).sort();
+	      fn.apply(currWays, [item]);
+	      fn.apply(currNodes, nodes);
+	      toJoin.splice(i, 1);
 	    }
 
-	};
+	    currWays.nodes = currNodes;
+	    sequences.push(currWays);
+	  }
 
-	var apibase$3 = 'https://wiki.openstreetmap.org/w/api.php';
-	var _inflight$1 = {};
-	var _wikibaseCache = {};
-	var _localeIDs = { en: false };
+	  return sequences;
+	}
 
+	function actionAddMember(relationId, member, memberIndex, insertPair) {
+	  return function action(graph) {
+	    var relation = graph.entity(relationId); // There are some special rules for Public Transport v2 routes.
 
-	var debouncedRequest = debounce(request, 500, { leading: false });
+	    var isPTv2 = /stop|platform/.test(member.role);
 
-	function request(url, callback) {
-	    if (_inflight$1[url]) { return; }
-	    var controller = new AbortController();
-	    _inflight$1[url] = controller;
+	    if ((isNaN(memberIndex) || insertPair) && member.type === 'way' && !isPTv2) {
+	      // Try to perform sensible inserts based on how the ways join together
+	      graph = addWayMember(relation, graph);
+	    } else {
+	      // see https://wiki.openstreetmap.org/wiki/Public_transport#Service_routes
+	      // Stops and Platforms for PTv2 should be ordered first.
+	      // hack: We do not currently have the ability to place them in the exactly correct order.
+	      if (isPTv2 && isNaN(memberIndex)) {
+	        memberIndex = 0;
+	      }
 
-	    d3_json(url, { signal: controller.signal })
-	        .then(function(result) {
-	            delete _inflight$1[url];
-	            if (callback) { callback(null, result); }
-	        })
-	        .catch(function(err) {
-	            delete _inflight$1[url];
-	            if (err.name === 'AbortError') { return; }
-	            if (callback) { callback(err.message); }
-	        });
-	}
+	      graph = graph.replace(relation.addMember(member, memberIndex));
+	    }
 
+	    return graph;
+	  }; // Add a way member into the relation "wherever it makes sense".
+	  // In this situation we were not supplied a memberIndex.
 
-	/**
-	 * Get the best string value from the descriptions/labels result
-	 * Note that if mediawiki doesn't recognize language code, it will return all values.
-	 * In that case, fallback to use English.
-	 * @param values object - either descriptions or labels
-	 * @param langCode String
-	 * @returns localized string
-	 */
-	function localizedToString(values, langCode) {
-	    if (values) {
-	        values = values[langCode] || values.en;
-	    }
-	    return values ? values.value : '';
-	}
+	  function addWayMember(relation, graph) {
+	    var groups, tempWay, item, i, j, k; // remove PTv2 stops and platforms before doing anything.
 
+	    var PTv2members = [];
+	    var members = [];
 
-	var serviceOsmWikibase = {
+	    for (i = 0; i < relation.members.length; i++) {
+	      var m = relation.members[i];
 
-	    init: function() {
-	        _inflight$1 = {};
-	        _wikibaseCache = {};
-	        _localeIDs = {};
-	    },
+	      if (/stop|platform/.test(m.role)) {
+	        PTv2members.push(m);
+	      } else {
+	        members.push(m);
+	      }
+	    }
 
+	    relation = relation.update({
+	      members: members
+	    });
 
-	    reset: function() {
-	        Object.values(_inflight$1).forEach(function(controller) { controller.abort(); });
-	        _inflight$1 = {};
-	    },
+	    if (insertPair) {
+	      // We're adding a member that must stay paired with an existing member.
+	      // (This feature is used by `actionSplit`)
+	      //
+	      // This is tricky because the members may exist multiple times in the
+	      // member list, and with different A-B/B-A ordering and different roles.
+	      // (e.g. a bus route that loops out and back - #4589).
+	      //
+	      // Replace the existing member with a temporary way,
+	      // so that `osmJoinWays` can treat the pair like a single way.
+	      tempWay = osmWay({
+	        id: 'wTemp',
+	        nodes: insertPair.nodes
+	      });
+	      graph = graph.replace(tempWay);
+	      var tempMember = {
+	        id: tempWay.id,
+	        type: 'way',
+	        role: member.role
+	      };
+	      var tempRelation = relation.replaceMember({
+	        id: insertPair.originalID
+	      }, tempMember, true);
+	      groups = utilArrayGroupBy(tempRelation.members, 'type');
+	      groups.way = groups.way || [];
+	    } else {
+	      // Add the member anywhere, one time. Just push and let `osmJoinWays` decide where to put it.
+	      groups = utilArrayGroupBy(relation.members, 'type');
+	      groups.way = groups.way || [];
+	      groups.way.push(member);
+	    }
 
+	    members = withIndex(groups.way);
+	    var joined = osmJoinWays(members, graph); // `joined` might not contain all of the way members,
+	    // But will contain only the completed (downloaded) members
 
-	    /**
-	     * Get the best value for the property, or undefined if not found
-	     * @param entity object from wikibase
-	     * @param property string e.g. 'P4' for image
-	     * @param langCode string e.g. 'fr' for French
-	     */
-	    claimToValue: function(entity, property, langCode) {
-	        if (!entity.claims[property]) { return undefined; }
-	        var locale = _localeIDs[langCode];
-	        var preferredPick, localePick;
-
-	        entity.claims[property].forEach(function(stmt) {
-	            // If exists, use value limited to the needed language (has a qualifier P26 = locale)
-	            // Or if not found, use the first value with the "preferred" rank
-	            if (!preferredPick && stmt.rank === 'preferred') {
-	                preferredPick = stmt;
-	            }
-	            if (locale && stmt.qualifiers && stmt.qualifiers.P26 &&
-	                stmt.qualifiers.P26[0].datavalue.value.id === locale
-	            ) {
-	                localePick = stmt;
-	            }
-	        });
+	    for (i = 0; i < joined.length; i++) {
+	      var segment = joined[i];
+	      var nodes = segment.nodes.slice();
+	      var startIndex = segment[0].index; // j = array index in `members` where this segment starts
 
-	        var result = localePick || preferredPick;
-	        if (result) {
-	            var datavalue = result.mainsnak.datavalue;
-	            return datavalue.type === 'wikibase-entityid' ? datavalue.value.id : datavalue.value;
-	        } else {
-	            return undefined;
+	      for (j = 0; j < members.length; j++) {
+	        if (members[j].index === startIndex) {
+	          break;
 	        }
-	    },
-
+	      } // k = each member in segment
 
-	    /**
-	     * Convert monolingual property into a key-value object (language -> value)
-	     * @param entity object from wikibase
-	     * @param property string e.g. 'P31' for monolingual wiki page title
-	     */
-	    monolingualClaimToValueObj: function(entity, property) {
-	        if (!entity || !entity.claims[property]) { return undefined; }
-
-	        return entity.claims[property].reduce(function(acc, obj) {
-	            var value = obj.mainsnak.datavalue.value;
-	            acc[value.language] = value.text;
-	            return acc;
-	        }, {});
-	    },
 
+	      for (k = 0; k < segment.length; k++) {
+	        item = segment[k];
+	        var way = graph.entity(item.id); // If this is a paired item, generate members in correct order and role
 
-	    toSitelink: function(key, value) {
-	        var result = value ? ('Tag:' + key + '=' + value) : 'Key:' + key;
-	        return result.replace(/_/g, ' ').trim();
-	    },
+	        if (tempWay && item.id === tempWay.id) {
+	          if (nodes[0].id === insertPair.nodes[0]) {
+	            item.pair = [{
+	              id: insertPair.originalID,
+	              type: 'way',
+	              role: item.role
+	            }, {
+	              id: insertPair.insertedID,
+	              type: 'way',
+	              role: item.role
+	            }];
+	          } else {
+	            item.pair = [{
+	              id: insertPair.insertedID,
+	              type: 'way',
+	              role: item.role
+	            }, {
+	              id: insertPair.originalID,
+	              type: 'way',
+	              role: item.role
+	            }];
+	          }
+	        } // reorder `members` if necessary
 
 
-	    //
-	    // Pass params object of the form:
-	    // {
-	    //   key: 'string',
-	    //   value: 'string',
-	    //   langCode: 'string'
-	    // }
-	    //
-	    getEntity: function(params, callback) {
-	        var doRequest = params.debounce ? debouncedRequest : request;
-	        var that = this;
-	        var titles = [];
-	        var result = {};
-	        var rtypeSitelink = (params.key === 'type' && params.value) ? ('Relation:' + params.value).replace(/_/g, ' ').trim() : false;
-	        var keySitelink = params.key ? this.toSitelink(params.key) : false;
-	        var tagSitelink = (params.key && params.value) ? this.toSitelink(params.key, params.value) : false;
-	        var localeSitelink;
-
-	        if (params.langCode && _localeIDs[params.langCode] === undefined) {
-	            // If this is the first time we are asking about this locale,
-	            // fetch corresponding entity (if it exists), and cache it.
-	            // If there is no such entry, cache `false` value to avoid re-requesting it.
-	            localeSitelink = ('Locale:' + params.langCode).replace(/_/g, ' ').trim();
-	            titles.push(localeSitelink);
-	        }
-
-	        if (rtypeSitelink) {
-	            if (_wikibaseCache[rtypeSitelink]) {
-	                result.rtype = _wikibaseCache[rtypeSitelink];
-	            } else {
-	                titles.push(rtypeSitelink);
-	            }
+	        if (k > 0) {
+	          if (j + k >= members.length || item.index !== members[j + k].index) {
+	            moveMember(members, item.index, j + k);
+	          }
 	        }
 
-	        if (keySitelink) {
-	            if (_wikibaseCache[keySitelink]) {
-	                result.key = _wikibaseCache[keySitelink];
-	            } else {
-	                titles.push(keySitelink);
-	            }
-	        }
+	        nodes.splice(0, way.nodes.length - 1);
+	      }
+	    }
 
-	        if (tagSitelink) {
-	            if (_wikibaseCache[tagSitelink]) {
-	                result.tag = _wikibaseCache[tagSitelink];
-	            } else {
-	                titles.push(tagSitelink);
-	            }
-	        }
+	    if (tempWay) {
+	      graph = graph.remove(tempWay);
+	    } // Final pass: skip dead items, split pairs, remove index properties
 
-	        if (!titles.length) {
-	            // Nothing to do, we already had everything in the cache
-	            return callback(null, result);
-	        }
-
-	        // Requesting just the user language code
-	        // If backend recognizes the code, it will perform proper fallbacks,
-	        // and the result will contain the requested code. If not, all values are returned:
-	        // {"zh-tw":{"value":"...","language":"zh-tw","source-language":"zh-hant"}
-	        // {"pt-br":{"value":"...","language":"pt","for-language":"pt-br"}}
-	        var obj = {
-	            action: 'wbgetentities',
-	            sites: 'wiki',
-	            titles: titles.join('|'),
-	            languages: params.langCode,
-	            languagefallback: 1,
-	            origin: '*',
-	            format: 'json',
-	            // There is an MW Wikibase API bug https://phabricator.wikimedia.org/T212069
-	            // We shouldn't use v1 until it gets fixed, but should switch to it afterwards
-	            // formatversion: 2,
-	        };
 
-	        var url = apibase$3 + '?' + utilQsString(obj);
-	        doRequest(url, function(err, d) {
-	            if (err) {
-	                callback(err);
-	            } else if (!d.success || d.error) {
-	                callback(d.error.messages.map(function(v) { return v.html['*']; }).join('<br>'));
-	            } else {
-	                var localeID = false;
-	                Object.values(d.entities).forEach(function(res) {
-	                    if (res.missing !== '') {
-	                        // Simplify access to the localized values
-	                        res.description = localizedToString(res.descriptions, params.langCode);
-	                        res.label = localizedToString(res.labels, params.langCode);
-
-	                        var title = res.sitelinks.wiki.title;
-	                        if (title === rtypeSitelink) {
-	                            _wikibaseCache[rtypeSitelink] = res;
-	                            result.rtype = res;
-	                        } else if (title === keySitelink) {
-	                            _wikibaseCache[keySitelink] = res;
-	                            result.key = res;
-	                        } else if (title === tagSitelink) {
-	                            _wikibaseCache[tagSitelink] = res;
-	                            result.tag = res;
-	                        } else if (title === localeSitelink) {
-	                            localeID = res.id;
-	                        } else {
-	                            console.log('Unexpected title ' + title);  // eslint-disable-line no-console
-	                        }
-	                    }
-	                });
+	    var wayMembers = [];
 
-	                if (localeSitelink) {
-	                    // If locale ID is not found, store false to prevent repeated queries
-	                    that.addLocale(params.langCode, localeID);
-	                }
+	    for (i = 0; i < members.length; i++) {
+	      item = members[i];
+	      if (item.index === -1) continue;
 
-	                callback(null, result);
-	            }
-	        });
-	    },
+	      if (item.pair) {
+	        wayMembers.push(item.pair[0]);
+	        wayMembers.push(item.pair[1]);
+	      } else {
+	        wayMembers.push(utilObjectOmit(item, ['index']));
+	      }
+	    } // Put stops and platforms first, then nodes, ways, relations
+	    // This is recommended for Public Transport v2 routes:
+	    // see https://wiki.openstreetmap.org/wiki/Public_transport#Service_routes
 
 
+	    var newMembers = PTv2members.concat(groups.node || [], wayMembers, groups.relation || []);
+	    return graph.replace(relation.update({
+	      members: newMembers
+	    })); // `moveMember()` changes the `members` array in place by splicing
+	    // the item with `.index = findIndex` to where it belongs,
+	    // and marking the old position as "dead" with `.index = -1`
 	    //
-	    // Pass params object of the form:
-	    // {
-	    //   key: 'string',     // required
-	    //   value: 'string'    // optional
-	    // }
+	    // j=5, k=0                jk
+	    // segment                 5 4 7 6
+	    // members       0 1 2 3 4 5 6 7 8 9        keep 5 in j+k
 	    //
-	    // Get an result object used to display tag documentation
-	    // {
-	    //   title:        'string',
-	    //   description:  'string',
-	    //   editURL:      'string',
-	    //   imageURL:     'string',
-	    //   wiki:         { title: 'string', text: 'string', url: 'string' }
-	    // }
+	    // j=5, k=1                j k
+	    // segment                 5 4 7 6
+	    // members       0 1 2 3 4 5 6 7 8 9        move 4 to j+k
+	    // members       0 1 2 3 x 5 4 6 7 8 9      moved
+	    //
+	    // j=5, k=2                j   k
+	    // segment                 5 4 7 6
+	    // members       0 1 2 3 x 5 4 6 7 8 9      move 7 to j+k
+	    // members       0 1 2 3 x 5 4 7 6 x 8 9    moved
+	    //
+	    // j=5, k=3                j     k
+	    // segment                 5 4 7 6
+	    // members       0 1 2 3 x 5 4 7 6 x 8 9    keep 6 in j+k
 	    //
-	    getDocs: function(params, callback) {
-	        var that = this;
-	        var langCode = _mainLocalizer.localeCode().toLowerCase();
-	        params.langCode = langCode;
-
-	        this.getEntity(params, function(err, data) {
-	            if (err) {
-	                callback(err);
-	                return;
-	            }
-
-	            var entity = data.rtype || data.tag || data.key;
-	            if (!entity) {
-	                callback('No entity');
-	                return;
-	            }
-
-	            // prepare result
-	            var result = {
-	                title: entity.title,
-	                description: entity.description,
-	                editURL: 'https://wiki.openstreetmap.org/wiki/' + entity.title
-	            };
-
-	            // add image
-	            if (entity.claims) {
-	                var imageroot;
-	                var image = that.claimToValue(entity, 'P4', langCode);
-	                if (image) {
-	                    imageroot = 'https://commons.wikimedia.org/w/index.php';
-	                } else {
-	                    image = that.claimToValue(entity, 'P28', langCode);
-	                    if (image) {
-	                        imageroot = 'https://wiki.openstreetmap.org/w/index.php';
-	                    }
-	                }
-	                if (imageroot && image) {
-	                    result.imageURL = imageroot + '?' + utilQsString({
-	                        title: 'Special:Redirect/file/' + image,
-	                        width: 400
-	                    });
-	                }
-	            }
-
-	            // Try to get a wiki page from tag data item first, followed by the corresponding key data item.
-	            // If neither tag nor key data item contain a wiki page in the needed language nor English,
-	            // get the first found wiki page from either the tag or the key item.
-	            var rtypeWiki = that.monolingualClaimToValueObj(data.rtype, 'P31');
-	            var tagWiki = that.monolingualClaimToValueObj(data.tag, 'P31');
-	            var keyWiki = that.monolingualClaimToValueObj(data.key, 'P31');
-
-	            // If exact language code does not exist, try to find the first part before the '-'
-	            // BUG: in some cases, a more elaborate fallback logic might be needed
-	            var langPrefix = langCode.split('-', 2)[0];
-
-	            // use the first acceptable wiki page
-	            result.wiki =
-	                getWikiInfo(rtypeWiki, langCode, 'inspector.wiki_reference') ||
-	                getWikiInfo(rtypeWiki, langPrefix, 'inspector.wiki_reference') ||
-	                getWikiInfo(rtypeWiki, 'en', 'inspector.wiki_en_reference') ||
-	                getWikiInfo(tagWiki, langCode, 'inspector.wiki_reference') ||
-	                getWikiInfo(tagWiki, langPrefix, 'inspector.wiki_reference') ||
-	                getWikiInfo(tagWiki, 'en', 'inspector.wiki_en_reference') ||
-	                getWikiInfo(keyWiki, langCode, 'inspector.wiki_reference') ||
-	                getWikiInfo(keyWiki, langPrefix, 'inspector.wiki_reference') ||
-	                getWikiInfo(keyWiki, 'en', 'inspector.wiki_en_reference');
-
-	            callback(null, result);
-
-
-	            // Helper method to get wiki info if a given language exists
-	            function getWikiInfo(wiki, langCode, tKey) {
-	                if (wiki && wiki[langCode]) {
-	                    return {
-	                        title: wiki[langCode],
-	                        text: tKey,
-	                        url: 'https://wiki.openstreetmap.org/wiki/' + wiki[langCode]
-	                    };
-	                }
-	            }
-	        });
-	    },
-
 
-	    addLocale: function(langCode, qid) {
-	        // Makes it easier to unit test
-	        _localeIDs[langCode] = qid;
-	    },
+	    function moveMember(arr, findIndex, toIndex) {
+	      var i;
 
+	      for (i = 0; i < arr.length; i++) {
+	        if (arr[i].index === findIndex) {
+	          break;
+	        }
+	      }
 
-	    apibase: function(val) {
-	        if (!arguments.length) { return apibase$3; }
-	        apibase$3 = val;
-	        return this;
-	    }
+	      var item = Object.assign({}, arr[i]); // shallow copy
 
-	};
+	      arr[i].index = -1; // mark as dead
 
-	var jsonpCache = {};
-	window.jsonpCache = jsonpCache;
+	      item.index = toIndex;
+	      arr.splice(toIndex, 0, item);
+	    } // This is the same as `Relation.indexedMembers`,
+	    // Except we don't want to index all the members, only the ways
 
-	function jsonpRequest(url, callback) {
-	    var request = {
-	        abort: function() {}
-	    };
 
-	    if (window.JSONP_FIX) {
-	        if (window.JSONP_DELAY === 0) {
-	            callback(window.JSONP_FIX);
-	        } else {
-	            var t = window.setTimeout(function() {
-	                callback(window.JSONP_FIX);
-	            }, window.JSONP_DELAY || 0);
+	    function withIndex(arr) {
+	      var result = new Array(arr.length);
 
-	            request.abort = function() { window.clearTimeout(t); };
-	        }
+	      for (var i = 0; i < arr.length; i++) {
+	        result[i] = Object.assign({}, arr[i]); // shallow copy
 
-	        return request;
-	    }
+	        result[i].index = i;
+	      }
 
-	    function rand() {
-	        var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
-	        var c = '';
-	        var i = -1;
-	        while (++i < 15) { c += chars.charAt(Math.floor(Math.random() * 52)); }
-	        return c;
+	      return result;
 	    }
+	  }
+	}
 
-	    function create(url) {
-	        var e = url.match(/callback=(\w+)/);
-	        var c = e ? e[1] : rand();
-
-	        jsonpCache[c] = function(data) {
-	            if (jsonpCache[c]) {
-	                callback(data);
-	            }
-	            finalize();
-	        };
+	function actionAddMidpoint(midpoint, node) {
+	  return function (graph) {
+	    graph = graph.replace(node.move(midpoint.loc));
+	    var parents = utilArrayIntersection(graph.parentWays(graph.entity(midpoint.edge[0])), graph.parentWays(graph.entity(midpoint.edge[1])));
+	    parents.forEach(function (way) {
+	      for (var i = 0; i < way.nodes.length - 1; i++) {
+	        if (geoEdgeEqual([way.nodes[i], way.nodes[i + 1]], midpoint.edge)) {
+	          graph = graph.replace(graph.entity(way.id).addNode(node.id, i + 1)); // Add only one midpoint on doubled-back segments,
+	          // turning them into self-intersections.
 
-	        function finalize() {
-	            delete jsonpCache[c];
-	            script.remove();
+	          return;
 	        }
+	      }
+	    });
+	    return graph;
+	  };
+	}
 
-	        request.abort = finalize;
-	        return 'jsonpCache.' + c;
-	    }
+	// https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/AddNodeToWayAction.as
+	function actionAddVertex(wayId, nodeId, index) {
+	  return function (graph) {
+	    return graph.replace(graph.entity(wayId).addNode(nodeId, index));
+	  };
+	}
 
-	    var cb = create(url);
+	function actionChangeMember(relationId, member, memberIndex) {
+	  return function (graph) {
+	    return graph.replace(graph.entity(relationId).updateMember(member, memberIndex));
+	  };
+	}
 
-	    var script = select('head')
-	        .append('script')
-	        .attr('type', 'text/javascript')
-	        .attr('src', url.replace(/(\{|%7B)callback(\}|%7D)/, cb));
+	function actionChangePreset(entityID, oldPreset, newPreset, skipFieldDefaults) {
+	  return function action(graph) {
+	    var entity = graph.entity(entityID);
+	    var geometry = entity.geometry(graph);
+	    var tags = entity.tags; // preserve tags that the new preset might care about, if any
 
-	    return request;
+	    if (oldPreset) tags = oldPreset.unsetTags(tags, geometry, newPreset && newPreset.addTags ? Object.keys(newPreset.addTags) : null);
+	    if (newPreset) tags = newPreset.setTags(tags, geometry, skipFieldDefaults);
+	    return graph.replace(entity.update({
+	      tags: tags
+	    }));
+	  };
 	}
 
-	var bubbleApi = 'https://dev.virtualearth.net/mapcontrol/HumanScaleServices/GetBubbles.ashx?';
-	var streetsideImagesApi = 'https://t.ssl.ak.tiles.virtualearth.net/tiles/';
-	var bubbleAppKey = 'AuftgJsO0Xs8Ts4M1xZUQJQXJNsvmh3IV8DkNieCiy3tCwCUMq76-WpkrBtNAuEm';
-	var pannellumViewerCSS = 'pannellum-streetside/pannellum.css';
-	var pannellumViewerJS = 'pannellum-streetside/pannellum.js';
-	var maxResults$2 = 2000;
-	var tileZoom$2 = 16.5;
-	var tiler$6 = utilTiler().zoomExtent([tileZoom$2, tileZoom$2]).skipNullIsland(true);
-	var dispatch$7 = dispatch('loadedBubbles', 'viewerChanged');
-	var minHfov = 10;         // zoom in degrees:  20, 10, 5
-	var maxHfov = 90;         // zoom out degrees
-	var defaultHfov = 45;
+	function actionChangeTags(entityId, tags) {
+	  return function (graph) {
+	    var entity = graph.entity(entityId);
+	    return graph.replace(entity.update({
+	      tags: tags
+	    }));
+	  };
+	}
 
-	var _hires = false;
-	var _resolution = 512;    // higher numbers are slower - 512, 1024, 2048, 4096
-	var _currScene = 0;
-	var _ssCache;
-	var _pannellumViewer;
-	var _sceneOptions;
-	var _dataUrlArray = [];
+	function osmNode() {
+	  if (!(this instanceof osmNode)) {
+	    return new osmNode().initialize(arguments);
+	  } else if (arguments.length) {
+	    this.initialize(arguments);
+	  }
+	}
+	osmEntity.node = osmNode;
+	osmNode.prototype = Object.create(osmEntity.prototype);
+	Object.assign(osmNode.prototype, {
+	  type: 'node',
+	  loc: [9999, 9999],
+	  extent: function extent() {
+	    return new geoExtent(this.loc);
+	  },
+	  geometry: function geometry(graph) {
+	    return graph["transient"](this, 'geometry', function () {
+	      return graph.isPoi(this) ? 'point' : 'vertex';
+	    });
+	  },
+	  move: function move(loc) {
+	    return this.update({
+	      loc: loc
+	    });
+	  },
+	  isDegenerate: function isDegenerate() {
+	    return !(Array.isArray(this.loc) && this.loc.length === 2 && this.loc[0] >= -180 && this.loc[0] <= 180 && this.loc[1] >= -90 && this.loc[1] <= 90);
+	  },
+	  // Inspect tags and geometry to determine which direction(s) this node/vertex points
+	  directions: function directions(resolver, projection) {
+	    var val;
+	    var i; // which tag to use?
+
+	    if (this.isHighwayIntersection(resolver) && (this.tags.stop || '').toLowerCase() === 'all') {
+	      // all-way stop tag on a highway intersection
+	      val = 'all';
+	    } else {
+	      // generic direction tag
+	      val = (this.tags.direction || '').toLowerCase(); // better suffix-style direction tag
 
+	      var re = /:direction$/i;
+	      var keys = Object.keys(this.tags);
 
-	/**
-	 * abortRequest().
-	 */
-	function abortRequest$6(i) {
-	  i.abort();
-	}
+	      for (i = 0; i < keys.length; i++) {
+	        if (re.test(keys[i])) {
+	          val = this.tags[keys[i]].toLowerCase();
+	          break;
+	        }
+	      }
+	    }
 
+	    if (val === '') return [];
+	    var cardinal = {
+	      north: 0,
+	      n: 0,
+	      northnortheast: 22,
+	      nne: 22,
+	      northeast: 45,
+	      ne: 45,
+	      eastnortheast: 67,
+	      ene: 67,
+	      east: 90,
+	      e: 90,
+	      eastsoutheast: 112,
+	      ese: 112,
+	      southeast: 135,
+	      se: 135,
+	      southsoutheast: 157,
+	      sse: 157,
+	      south: 180,
+	      s: 180,
+	      southsouthwest: 202,
+	      ssw: 202,
+	      southwest: 225,
+	      sw: 225,
+	      westsouthwest: 247,
+	      wsw: 247,
+	      west: 270,
+	      w: 270,
+	      westnorthwest: 292,
+	      wnw: 292,
+	      northwest: 315,
+	      nw: 315,
+	      northnorthwest: 337,
+	      nnw: 337
+	    };
+	    var values = val.split(';');
+	    var results = [];
+	    values.forEach(function (v) {
+	      // swap cardinal for numeric directions
+	      if (cardinal[v] !== undefined) {
+	        v = cardinal[v];
+	      } // numeric direction - just add to results
 
-	/**
-	 * localeTimeStamp().
-	 */
-	function localeTimestamp(s) {
-	  if (!s) { return null; }
-	  var options = { day: 'numeric', month: 'short', year: 'numeric' };
-	  var d = new Date(s);
-	  if (isNaN(d.getTime())) { return null; }
-	  return d.toLocaleString(_mainLocalizer.localeCode(), options);
-	}
 
+	      if (v !== '' && !isNaN(+v)) {
+	        results.push(+v);
+	        return;
+	      } // string direction - inspect parent ways
 
-	/**
-	 * loadTiles() wraps the process of generating tiles and then fetching image points for each tile.
-	 */
-	function loadTiles$2(which, url, projection, margin) {
-	  var tiles = tiler$6.margin(margin).getTiles(projection);
 
-	  // abort inflight requests that are no longer needed
-	  var cache = _ssCache[which];
-	  Object.keys(cache.inflight).forEach(function (k) {
-	    var wanted = tiles.find(function (tile) { return k.indexOf(tile.id + ',') === 0; });
-	    if (!wanted) {
-	      abortRequest$6(cache.inflight[k]);
-	      delete cache.inflight[k];
-	    }
-	  });
+	      var lookBackward = this.tags['traffic_sign:backward'] || v === 'backward' || v === 'both' || v === 'all';
+	      var lookForward = this.tags['traffic_sign:forward'] || v === 'forward' || v === 'both' || v === 'all';
+	      if (!lookForward && !lookBackward) return;
+	      var nodeIds = {};
+	      resolver.parentWays(this).forEach(function (parent) {
+	        var nodes = parent.nodes;
 
-	  tiles.forEach(function (tile) { return loadNextTilePage$2(which, url, tile); });
-	}
+	        for (i = 0; i < nodes.length; i++) {
+	          if (nodes[i] === this.id) {
+	            // match current entity
+	            if (lookForward && i > 0) {
+	              nodeIds[nodes[i - 1]] = true; // look back to prev node
+	            }
 
+	            if (lookBackward && i < nodes.length - 1) {
+	              nodeIds[nodes[i + 1]] = true; // look ahead to next node
+	            }
+	          }
+	        }
+	      }, this);
+	      Object.keys(nodeIds).forEach(function (nodeId) {
+	        // +90 because geoAngle returns angle from X axis, not Y (north)
+	        results.push(geoAngle(this, resolver.entity(nodeId), projection) * (180 / Math.PI) + 90);
+	      }, this);
+	    }, this);
+	    return utilArrayUniq(results);
+	  },
+	  isCrossing: function isCrossing() {
+	    return this.tags.highway === 'crossing' || this.tags.railway && this.tags.railway.indexOf('crossing') !== -1;
+	  },
+	  isEndpoint: function isEndpoint(resolver) {
+	    return resolver["transient"](this, 'isEndpoint', function () {
+	      var id = this.id;
+	      return resolver.parentWays(this).filter(function (parent) {
+	        return !parent.isClosed() && !!parent.affix(id);
+	      }).length > 0;
+	    });
+	  },
+	  isConnected: function isConnected(resolver) {
+	    return resolver["transient"](this, 'isConnected', function () {
+	      var parents = resolver.parentWays(this);
 
-	/**
-	 * loadNextTilePage() load data for the next tile page in line.
-	 */
-	function loadNextTilePage$2(which, url, tile) {
-	  var cache = _ssCache[which];
-	  var nextPage = cache.nextPage[tile.id] || 0;
-	  var id = tile.id + ',' + String(nextPage);
-	  if (cache.loaded[id] || cache.inflight[id]) { return; }
+	      if (parents.length > 1) {
+	        // vertex is connected to multiple parent ways
+	        for (var i in parents) {
+	          if (parents[i].geometry(resolver) === 'line' && parents[i].hasInterestingTags()) return true;
+	        }
+	      } else if (parents.length === 1) {
+	        var way = parents[0];
+	        var nodes = way.nodes.slice();
 
-	  cache.inflight[id] = getBubbles(url, tile, function (bubbles) {
-	    cache.loaded[id] = true;
-	    delete cache.inflight[id];
-	    if (!bubbles) { return; }
+	        if (way.isClosed()) {
+	          nodes.pop();
+	        } // ignore connecting node if closed
+	        // return true if vertex appears multiple times (way is self intersecting)
 
-	    // [].shift() removes the first element, some statistics info, not a bubble point
-	    bubbles.shift();
 
-	    var features = bubbles.map(function (bubble) {
-	      if (cache.points[bubble.id]) { return null; }  // skip duplicates
+	        return nodes.indexOf(this.id) !== nodes.lastIndexOf(this.id);
+	      }
 
-	      var loc = [bubble.lo, bubble.la];
-	      var d = {
-	        loc: loc,
-	        key: bubble.id,
-	        ca: bubble.he,
-	        captured_at: bubble.cd,
-	        captured_by: 'microsoft',
-	        // nbn: bubble.nbn,
-	        // pbn: bubble.pbn,
-	        // ad: bubble.ad,
-	        // rn: bubble.rn,
-	        pr: bubble.pr,  // previous
-	        ne: bubble.ne,  // next
-	        pano: true,
-	        sequenceKey: null
-	      };
+	      return false;
+	    });
+	  },
+	  parentIntersectionWays: function parentIntersectionWays(resolver) {
+	    return resolver["transient"](this, 'parentIntersectionWays', function () {
+	      return resolver.parentWays(this).filter(function (parent) {
+	        return (parent.tags.highway || parent.tags.waterway || parent.tags.railway || parent.tags.aeroway) && parent.geometry(resolver) === 'line';
+	      });
+	    });
+	  },
+	  isIntersection: function isIntersection(resolver) {
+	    return this.parentIntersectionWays(resolver).length > 1;
+	  },
+	  isHighwayIntersection: function isHighwayIntersection(resolver) {
+	    return resolver["transient"](this, 'isHighwayIntersection', function () {
+	      return resolver.parentWays(this).filter(function (parent) {
+	        return parent.tags.highway && parent.geometry(resolver) === 'line';
+	      }).length > 1;
+	    });
+	  },
+	  isOnAddressLine: function isOnAddressLine(resolver) {
+	    return resolver["transient"](this, 'isOnAddressLine', function () {
+	      return resolver.parentWays(this).filter(function (parent) {
+	        return parent.tags.hasOwnProperty('addr:interpolation') && parent.geometry(resolver) === 'line';
+	      }).length > 0;
+	    });
+	  },
+	  asJXON: function asJXON(changeset_id) {
+	    var r = {
+	      node: {
+	        '@id': this.osmId(),
+	        '@lon': this.loc[0],
+	        '@lat': this.loc[1],
+	        '@version': this.version || 0,
+	        tag: Object.keys(this.tags).map(function (k) {
+	          return {
+	            keyAttributes: {
+	              k: k,
+	              v: this.tags[k]
+	            }
+	          };
+	        }, this)
+	      }
+	    };
+	    if (changeset_id) r.node['@changeset'] = changeset_id;
+	    return r;
+	  },
+	  asGeoJSON: function asGeoJSON() {
+	    return {
+	      type: 'Point',
+	      coordinates: this.loc
+	    };
+	  }
+	});
 
-	      cache.points[bubble.id] = d;
+	function actionCircularize(wayId, projection, maxAngle) {
+	  maxAngle = (maxAngle || 20) * Math.PI / 180;
+
+	  var action = function action(graph, t) {
+	    if (t === null || !isFinite(t)) t = 1;
+	    t = Math.min(Math.max(+t, 0), 1);
+	    var way = graph.entity(wayId);
+	    var origNodes = {};
+	    graph.childNodes(way).forEach(function (node) {
+	      if (!origNodes[node.id]) origNodes[node.id] = node;
+	    });
 
-	      // a sequence starts here
-	      if (bubble.pr === undefined) {
-	        cache.leaders.push(bubble.id);
+	    if (!way.isConvex(graph)) {
+	      graph = action.makeConvex(graph);
+	    }
+
+	    var nodes = utilArrayUniq(graph.childNodes(way));
+	    var keyNodes = nodes.filter(function (n) {
+	      return graph.parentWays(n).length !== 1;
+	    });
+	    var points = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var keyPoints = keyNodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var centroid = points.length === 2 ? geoVecInterp(points[0], points[1], 0.5) : d3_polygonCentroid(points);
+	    var radius = d3_median(points, function (p) {
+	      return geoVecLength(centroid, p);
+	    });
+	    var sign = d3_polygonArea(points) > 0 ? 1 : -1;
+	    var ids, i, j, k; // we need at least two key nodes for the algorithm to work
+
+	    if (!keyNodes.length) {
+	      keyNodes = [nodes[0]];
+	      keyPoints = [points[0]];
+	    }
+
+	    if (keyNodes.length === 1) {
+	      var index = nodes.indexOf(keyNodes[0]);
+	      var oppositeIndex = Math.floor((index + nodes.length / 2) % nodes.length);
+	      keyNodes.push(nodes[oppositeIndex]);
+	      keyPoints.push(points[oppositeIndex]);
+	    } // key points and nodes are those connected to the ways,
+	    // they are projected onto the circle, in between nodes are moved
+	    // to constant intervals between key nodes, extra in between nodes are
+	    // added if necessary.
+
+
+	    for (i = 0; i < keyPoints.length; i++) {
+	      var nextKeyNodeIndex = (i + 1) % keyNodes.length;
+	      var startNode = keyNodes[i];
+	      var endNode = keyNodes[nextKeyNodeIndex];
+	      var startNodeIndex = nodes.indexOf(startNode);
+	      var endNodeIndex = nodes.indexOf(endNode);
+	      var numberNewPoints = -1;
+	      var indexRange = endNodeIndex - startNodeIndex;
+	      var nearNodes = {};
+	      var inBetweenNodes = [];
+	      var startAngle, endAngle, totalAngle, eachAngle;
+	      var angle, loc, node, origNode;
+
+	      if (indexRange < 0) {
+	        indexRange += nodes.length;
+	      } // position this key node
+
+
+	      var distance = geoVecLength(centroid, keyPoints[i]) || 1e-4;
+	      keyPoints[i] = [centroid[0] + (keyPoints[i][0] - centroid[0]) / distance * radius, centroid[1] + (keyPoints[i][1] - centroid[1]) / distance * radius];
+	      loc = projection.invert(keyPoints[i]);
+	      node = keyNodes[i];
+	      origNode = origNodes[node.id];
+	      node = node.move(geoVecInterp(origNode.loc, loc, t));
+	      graph = graph.replace(node); // figure out the between delta angle we want to match to
+
+	      startAngle = Math.atan2(keyPoints[i][1] - centroid[1], keyPoints[i][0] - centroid[0]);
+	      endAngle = Math.atan2(keyPoints[nextKeyNodeIndex][1] - centroid[1], keyPoints[nextKeyNodeIndex][0] - centroid[0]);
+	      totalAngle = endAngle - startAngle; // detects looping around -pi/pi
+
+	      if (totalAngle * sign > 0) {
+	        totalAngle = -sign * (2 * Math.PI - Math.abs(totalAngle));
 	      }
 
-	      return {
-	        minX: loc[0], minY: loc[1], maxX: loc[0], maxY: loc[1], data: d
-	      };
+	      do {
+	        numberNewPoints++;
+	        eachAngle = totalAngle / (indexRange + numberNewPoints);
+	      } while (Math.abs(eachAngle) > maxAngle); // move existing nodes
 
-	    }).filter(Boolean);
 
-	    cache.rtree.load(features);
+	      for (j = 1; j < indexRange; j++) {
+	        angle = startAngle + j * eachAngle;
+	        loc = projection.invert([centroid[0] + Math.cos(angle) * radius, centroid[1] + Math.sin(angle) * radius]);
+	        node = nodes[(j + startNodeIndex) % nodes.length];
+	        origNode = origNodes[node.id];
+	        nearNodes[node.id] = angle;
+	        node = node.move(geoVecInterp(origNode.loc, loc, t));
+	        graph = graph.replace(node);
+	      } // add new in between nodes if necessary
 
-	    connectSequences();
 
-	    if (which === 'bubbles') {
-	      dispatch$7.call('loadedBubbles');
-	    }
-	  });
-	}
+	      for (j = 0; j < numberNewPoints; j++) {
+	        angle = startAngle + (indexRange + j) * eachAngle;
+	        loc = projection.invert([centroid[0] + Math.cos(angle) * radius, centroid[1] + Math.sin(angle) * radius]); // choose a nearnode to use as the original
 
+	        var min = Infinity;
 
-	// call this sometimes to connect the bubbles into sequences
-	function connectSequences() {
-	  var cache = _ssCache.bubbles;
-	  var keepLeaders = [];
+	        for (var nodeId in nearNodes) {
+	          var nearAngle = nearNodes[nodeId];
+	          var dist = Math.abs(nearAngle - angle);
 
-	  for (var i = 0; i < cache.leaders.length; i++) {
-	    var bubble = cache.points[cache.leaders[i]];
-	    var seen = {};
+	          if (dist < min) {
+	            min = dist;
+	            origNode = origNodes[nodeId];
+	          }
+	        }
 
-	    // try to make a sequence.. use the key of the leader bubble.
-	    var sequence = { key: bubble.key, bubbles: [] };
-	    var complete = false;
+	        node = osmNode({
+	          loc: geoVecInterp(origNode.loc, loc, t)
+	        });
+	        graph = graph.replace(node);
+	        nodes.splice(endNodeIndex + j, 0, node);
+	        inBetweenNodes.push(node.id);
+	      } // Check for other ways that share these keyNodes..
+	      // If keyNodes are adjacent in both ways,
+	      // we can add inBetweenNodes to that shared way too..
 
-	    do {
-	      sequence.bubbles.push(bubble);
-	      seen[bubble.key] = true;
 
-	      if (bubble.ne === undefined) {
-	        complete = true;
-	      } else {
-	        bubble = cache.points[bubble.ne];  // advance to next
-	      }
-	    } while (bubble && !seen[bubble.key] && !complete);
+	      if (indexRange === 1 && inBetweenNodes.length) {
+	        var startIndex1 = way.nodes.lastIndexOf(startNode.id);
+	        var endIndex1 = way.nodes.lastIndexOf(endNode.id);
+	        var wayDirection1 = endIndex1 - startIndex1;
 
+	        if (wayDirection1 < -1) {
+	          wayDirection1 = 1;
+	        }
 
-	    if (complete) {
-	      _ssCache.sequences[sequence.key] = sequence;
+	        var parentWays = graph.parentWays(keyNodes[i]);
 
-	      // assign bubbles to the sequence
-	      for (var j = 0; j < sequence.bubbles.length; j++) {
-	        sequence.bubbles[j].sequenceKey = sequence.key;
-	      }
+	        for (j = 0; j < parentWays.length; j++) {
+	          var sharedWay = parentWays[j];
+	          if (sharedWay === way) continue;
 
-	      // create a GeoJSON LineString
-	      sequence.geojson = {
-	        type: 'LineString',
-	        properties: { key: sequence.key },
-	        coordinates: sequence.bubbles.map(function (d) { return d.loc; })
-	      };
+	          if (sharedWay.areAdjacent(startNode.id, endNode.id)) {
+	            var startIndex2 = sharedWay.nodes.lastIndexOf(startNode.id);
+	            var endIndex2 = sharedWay.nodes.lastIndexOf(endNode.id);
+	            var wayDirection2 = endIndex2 - startIndex2;
+	            var insertAt = endIndex2;
 
-	    } else {
-	      keepLeaders.push(cache.leaders[i]);
-	    }
-	  }
+	            if (wayDirection2 < -1) {
+	              wayDirection2 = 1;
+	            }
 
-	  // couldn't complete these, save for later
-	  cache.leaders = keepLeaders;
-	}
+	            if (wayDirection1 !== wayDirection2) {
+	              inBetweenNodes.reverse();
+	              insertAt = startIndex2;
+	            }
 
+	            for (k = 0; k < inBetweenNodes.length; k++) {
+	              sharedWay = sharedWay.addNode(inBetweenNodes[k], insertAt + k);
+	            }
 
-	/**
-	 * getBubbles() handles the request to the server for a tile extent of 'bubbles' (streetside image locations).
-	 */
-	function getBubbles(url, tile, callback) {
-	  var rect = tile.extent.rectangle();
-	  var urlForRequest = url + utilQsString({
-	    n: rect[3],
-	    s: rect[1],
-	    e: rect[2],
-	    w: rect[0],
-	    c: maxResults$2,
-	    appkey: bubbleAppKey,
-	    jsCallback: '{callback}'
-	  });
+	            graph = graph.replace(sharedWay);
+	          }
+	        }
+	      }
+	    } // update the way to have all the new nodes
 
-	  return jsonpRequest(urlForRequest, function (data) {
-	    if (!data || data.error) {
-	      callback(null);
-	    } else {
-	      callback(data);
-	    }
-	  });
-	}
 
+	    ids = nodes.map(function (n) {
+	      return n.id;
+	    });
+	    ids.push(ids[0]);
+	    way = way.update({
+	      nodes: ids
+	    });
+	    graph = graph.replace(way);
+	    return graph;
+	  };
 
-	// partition viewport into higher zoom tiles
-	function partitionViewport$2(projection) {
-	  var z = geoScaleToZoom(projection.scale());
-	  var z2 = (Math.ceil(z * 2) / 2) + 2.5;   // round to next 0.5 and add 2.5
-	  var tiler = utilTiler().zoomExtent([z2, z2]);
+	  action.makeConvex = function (graph) {
+	    var way = graph.entity(wayId);
+	    var nodes = utilArrayUniq(graph.childNodes(way));
+	    var points = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var sign = d3_polygonArea(points) > 0 ? 1 : -1;
+	    var hull = d3_polygonHull(points);
+	    var i, j; // D3 convex hulls go counterclockwise..
 
-	  return tiler.getTiles(projection)
-	    .map(function (tile) { return tile.extent; });
-	}
+	    if (sign === -1) {
+	      nodes.reverse();
+	      points.reverse();
+	    }
 
+	    for (i = 0; i < hull.length - 1; i++) {
+	      var startIndex = points.indexOf(hull[i]);
+	      var endIndex = points.indexOf(hull[i + 1]);
+	      var indexRange = endIndex - startIndex;
 
-	// no more than `limit` results per partition.
-	function searchLimited$2(limit, projection, rtree) {
-	  limit = limit || 5;
+	      if (indexRange < 0) {
+	        indexRange += nodes.length;
+	      } // move interior nodes to the surface of the convex hull..
 
-	  return partitionViewport$2(projection)
-	    .reduce(function (result, extent) {
-	      var found = rtree.search(extent.bbox())
-	        .slice(0, limit)
-	        .map(function (d) { return d.data; });
 
-	      return (found.length ? result.concat(found) : result);
-	    }, []);
-	}
+	      for (j = 1; j < indexRange; j++) {
+	        var point = geoVecInterp(hull[i], hull[i + 1], j / indexRange);
+	        var node = nodes[(j + startIndex) % nodes.length].move(projection.invert(point));
+	        graph = graph.replace(node);
+	      }
+	    }
 
+	    return graph;
+	  };
 
-	/**
-	 * loadImage()
-	 */
-	function loadImage(imgInfo) {
-	  return new Promise(function (resolve) {
-	    var img = new Image();
-	    img.onload = function () {
-	      var canvas = document.getElementById('ideditor-canvas' + imgInfo.face);
-	      var ctx = canvas.getContext('2d');
-	      ctx.drawImage(img, imgInfo.x, imgInfo.y);
-	      resolve({ imgInfo: imgInfo, status: 'ok' });
-	    };
-	    img.onerror = function () {
-	      resolve({ data: imgInfo, status: 'error' });
-	    };
-	    img.setAttribute('crossorigin', '');
-	    img.src = imgInfo.url;
-	  });
-	}
+	  action.disabled = function (graph) {
+	    if (!graph.entity(wayId).isClosed()) {
+	      return 'not_closed';
+	    } //disable when already circular
 
 
-	/**
-	 * loadCanvas()
-	 */
-	function loadCanvas(imageGroup) {
-	  return Promise.all(imageGroup.map(loadImage))
-	    .then(function (data) {
-	      var canvas = document.getElementById('ideditor-canvas' + data[0].imgInfo.face);
-	      var which = { '01': 0, '02': 1, '03': 2, '10': 3, '11': 4, '12': 5 };
-	      var face = data[0].imgInfo.face;
-	      _dataUrlArray[which[face]] = canvas.toDataURL('image/jpeg', 1.0);
-	      return { status: 'loadCanvas for face ' + data[0].imgInfo.face + 'ok'};
+	    var way = graph.entity(wayId);
+	    var nodes = utilArrayUniq(graph.childNodes(way));
+	    var points = nodes.map(function (n) {
+	      return projection(n.loc);
 	    });
-	}
+	    var hull = d3_polygonHull(points);
+	    var epsilonAngle = Math.PI / 180;
 
+	    if (hull.length !== points.length || hull.length < 3) {
+	      return false;
+	    }
 
-	/**
-	 * loadFaces()
-	 */
-	function loadFaces(faceGroup) {
-	  return Promise.all(faceGroup.map(loadCanvas))
-	    .then(function () { return { status: 'loadFaces done' }; });
-	}
+	    var centroid = d3_polygonCentroid(points);
+	    var radius = geoVecLengthSquare(centroid, points[0]);
+	    var i, actualPoint; // compare distances between centroid and points
 
+	    for (i = 0; i < hull.length; i++) {
+	      actualPoint = hull[i];
+	      var actualDist = geoVecLengthSquare(actualPoint, centroid);
+	      var diff = Math.abs(actualDist - radius); //compare distances with epsilon-error (5%)
 
-	function setupCanvas(selection, reset) {
-	  if (reset) {
-	    selection.selectAll('#ideditor-stitcher-canvases')
-	      .remove();
-	  }
+	      if (diff > 0.05 * radius) {
+	        return false;
+	      }
+	    } //check if central angles are smaller than maxAngle
 
-	  // Add the Streetside working canvases. These are used for 'stitching', or combining,
-	  // multiple images for each of the six faces, before passing to the Pannellum control as DataUrls
-	  selection.selectAll('#ideditor-stitcher-canvases')
-	    .data([0])
-	    .enter()
-	    .append('div')
-	    .attr('id', 'ideditor-stitcher-canvases')
-	    .attr('display', 'none')
-	    .selectAll('canvas')
-	    .data(['canvas01', 'canvas02', 'canvas03', 'canvas10', 'canvas11', 'canvas12'])
-	    .enter()
-	    .append('canvas')
-	    .attr('id', function (d) { return 'ideditor-' + d; })
-	    .attr('width', _resolution)
-	    .attr('height', _resolution);
-	}
 
+	    for (i = 0; i < hull.length; i++) {
+	      actualPoint = hull[i];
+	      var nextPoint = hull[(i + 1) % hull.length];
+	      var startAngle = Math.atan2(actualPoint[1] - centroid[1], actualPoint[0] - centroid[0]);
+	      var endAngle = Math.atan2(nextPoint[1] - centroid[1], nextPoint[0] - centroid[0]);
+	      var angle = endAngle - startAngle;
 
-	function qkToXY(qk) {
-	  var x = 0;
-	  var y = 0;
-	  var scale = 256;
-	  for (var i = qk.length; i > 0; i--) {
-	    var key = qk[i-1];
-	    x += (+(key === '1' || key === '3')) * scale;
-	    y += (+(key === '2' || key === '3')) * scale;
-	    scale *= 2;
-	  }
-	  return [x, y];
-	}
+	      if (angle < 0) {
+	        angle = -angle;
+	      }
 
+	      if (angle > Math.PI) {
+	        angle = 2 * Math.PI - angle;
+	      }
 
-	function getQuadKeys() {
-	  var dim = _resolution / 256;
-	  var quadKeys;
+	      if (angle > maxAngle + epsilonAngle) {
+	        return false;
+	      }
+	    }
 
-	  if (dim === 16) {
-	    quadKeys = [
-	      '0000','0001','0010','0011','0100','0101','0110','0111',  '1000','1001','1010','1011','1100','1101','1110','1111',
-	      '0002','0003','0012','0013','0102','0103','0112','0113',  '1002','1003','1012','1013','1102','1103','1112','1113',
-	      '0020','0021','0030','0031','0120','0121','0130','0131',  '1020','1021','1030','1031','1120','1121','1130','1131',
-	      '0022','0023','0032','0033','0122','0123','0132','0133',  '1022','1023','1032','1033','1122','1123','1132','1133',
-	      '0200','0201','0210','0211','0300','0301','0310','0311',  '1200','1201','1210','1211','1300','1301','1310','1311',
-	      '0202','0203','0212','0213','0302','0303','0312','0313',  '1202','1203','1212','1213','1302','1303','1312','1313',
-	      '0220','0221','0230','0231','0320','0321','0330','0331',  '1220','1221','1230','1231','1320','1321','1330','1331',
-	      '0222','0223','0232','0233','0322','0323','0332','0333',  '1222','1223','1232','1233','1322','1323','1332','1333',
-
-	      '2000','2001','2010','2011','2100','2101','2110','2111',  '3000','3001','3010','3011','3100','3101','3110','3111',
-	      '2002','2003','2012','2013','2102','2103','2112','2113',  '3002','3003','3012','3013','3102','3103','3112','3113',
-	      '2020','2021','2030','2031','2120','2121','2130','2131',  '3020','3021','3030','3031','3120','3121','3130','3131',
-	      '2022','2023','2032','2033','2122','2123','2132','2133',  '3022','3023','3032','3033','3122','3123','3132','3133',
-	      '2200','2201','2210','2211','2300','2301','2310','2311',  '3200','3201','3210','3211','3300','3301','3310','3311',
-	      '2202','2203','2212','2213','2302','2303','2312','2313',  '3202','3203','3212','3213','3302','3303','3312','3313',
-	      '2220','2221','2230','2231','2320','2321','2330','2331',  '3220','3221','3230','3231','3320','3321','3330','3331',
-	      '2222','2223','2232','2233','2322','2323','2332','2333',  '3222','3223','3232','3233','3322','3323','3332','3333'
-	    ];
+	    return 'already_circular';
+	  };
 
-	  } else if (dim === 8) {
-	    quadKeys = [
-	      '000','001','010','011',  '100','101','110','111',
-	      '002','003','012','013',  '102','103','112','113',
-	      '020','021','030','031',  '120','121','130','131',
-	      '022','023','032','033',  '122','123','132','133',
-
-	      '200','201','210','211',  '300','301','310','311',
-	      '202','203','212','213',  '302','303','312','313',
-	      '220','221','230','231',  '320','321','330','331',
-	      '222','223','232','233',  '322','323','332','333'
-	    ];
+	  action.transitionable = true;
+	  return action;
+	}
 
-	  } else if (dim === 4) {
-	    quadKeys = [
-	      '00','01',  '10','11',
-	      '02','03',  '12','13',
+	function actionDeleteWay(wayID) {
+	  function canDeleteNode(node, graph) {
+	    // don't delete nodes still attached to ways or relations
+	    if (graph.parentWays(node).length || graph.parentRelations(node).length) return false;
+	    var geometries = osmNodeGeometriesForTags(node.tags); // don't delete if this node can be a standalone point
 
-	      '20','21',  '30','31',
-	      '22','23',  '32','33'
-	    ];
+	    if (geometries.point) return false; // delete if this node only be a vertex
 
-	  } else {  // dim === 2
-	    quadKeys = [
-	      '0', '1',
-	      '2', '3'
-	    ];
+	    if (geometries.vertex) return true; // iD doesn't know if this should be a point or vertex,
+	    // so only delete if there are no interesting tags
+
+	    return !node.hasInterestingTags();
 	  }
 
-	  return quadKeys;
-	}
+	  var action = function action(graph) {
+	    var way = graph.entity(wayID);
+	    graph.parentRelations(way).forEach(function (parent) {
+	      parent = parent.removeMembersWithID(wayID);
+	      graph = graph.replace(parent);
 
+	      if (parent.isDegenerate()) {
+	        graph = actionDeleteRelation(parent.id)(graph);
+	      }
+	    });
+	    new Set(way.nodes).forEach(function (nodeID) {
+	      graph = graph.replace(way.removeNode(nodeID));
+	      var node = graph.entity(nodeID);
 
+	      if (canDeleteNode(node, graph)) {
+	        graph = graph.remove(node);
+	      }
+	    });
+	    return graph.remove(way);
+	  };
 
-	var serviceStreetside = {
-	  /**
-	   * init() initialize streetside.
-	   */
-	  init: function() {
-	    if (!_ssCache) {
-	      this.reset();
-	    }
+	  return action;
+	}
 
-	    this.event = utilRebind(this, dispatch$7, 'on');
-	  },
+	function actionDeleteMultiple(ids) {
+	  var actions = {
+	    way: actionDeleteWay,
+	    node: actionDeleteNode,
+	    relation: actionDeleteRelation
+	  };
 
-	  /**
-	   * reset() reset the cache.
-	   */
-	  reset: function() {
-	    if (_ssCache) {
-	      Object.values(_ssCache.bubbles.inflight).forEach(abortRequest$6);
-	    }
+	  var action = function action(graph) {
+	    ids.forEach(function (id) {
+	      if (graph.hasEntity(id)) {
+	        // It may have been deleted already.
+	        graph = actions[graph.entity(id).type](id)(graph);
+	      }
+	    });
+	    return graph;
+	  };
 
-	    _ssCache = {
-	      bubbles: { inflight: {}, loaded: {}, nextPage: {}, rtree: new RBush(), points: {}, leaders: [] },
-	      sequences: {}
-	    };
-	  },
+	  return action;
+	}
 
-	  /**
-	   * bubbles()
-	   */
-	  bubbles: function(projection) {
-	    var limit = 5;
-	    return searchLimited$2(limit, projection, _ssCache.bubbles.rtree);
-	  },
+	function actionDeleteRelation(relationID, allowUntaggedMembers) {
+	  function canDeleteEntity(entity, graph) {
+	    return !graph.parentWays(entity).length && !graph.parentRelations(entity).length && !entity.hasInterestingTags() && !allowUntaggedMembers;
+	  }
 
+	  var action = function action(graph) {
+	    var relation = graph.entity(relationID);
+	    graph.parentRelations(relation).forEach(function (parent) {
+	      parent = parent.removeMembersWithID(relationID);
+	      graph = graph.replace(parent);
 
-	  sequences: function(projection) {
-	    var viewport = projection.clipExtent();
-	    var min = [viewport[0][0], viewport[1][1]];
-	    var max = [viewport[1][0], viewport[0][1]];
-	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
-	    var seen = {};
-	    var results = [];
+	      if (parent.isDegenerate()) {
+	        graph = actionDeleteRelation(parent.id)(graph);
+	      }
+	    });
+	    var memberIDs = utilArrayUniq(relation.members.map(function (m) {
+	      return m.id;
+	    }));
+	    memberIDs.forEach(function (memberID) {
+	      graph = graph.replace(relation.removeMembersWithID(memberID));
+	      var entity = graph.entity(memberID);
+
+	      if (canDeleteEntity(entity, graph)) {
+	        graph = actionDeleteMultiple([memberID])(graph);
+	      }
+	    });
+	    return graph.remove(relation);
+	  };
 
-	    // all sequences for bubbles in viewport
-	    _ssCache.bubbles.rtree.search(bbox)
-	      .forEach(function (d) {
-	        var key = d.data.sequenceKey;
-	        if (key && !seen[key]) {
-	            seen[key] = true;
-	            results.push(_ssCache.sequences[key].geojson);
-	        }
-	      });
+	  return action;
+	}
 
-	    return results;
-	  },
+	function actionDeleteNode(nodeId) {
+	  var action = function action(graph) {
+	    var node = graph.entity(nodeId);
+	    graph.parentWays(node).forEach(function (parent) {
+	      parent = parent.removeNode(nodeId);
+	      graph = graph.replace(parent);
+
+	      if (parent.isDegenerate()) {
+	        graph = actionDeleteWay(parent.id)(graph);
+	      }
+	    });
+	    graph.parentRelations(node).forEach(function (parent) {
+	      parent = parent.removeMembersWithID(nodeId);
+	      graph = graph.replace(parent);
 
+	      if (parent.isDegenerate()) {
+	        graph = actionDeleteRelation(parent.id)(graph);
+	      }
+	    });
+	    return graph.remove(node);
+	  };
 
-	  /**
-	   * loadBubbles()
-	   */
-	  loadBubbles: function(projection, margin) {
-	    // by default: request 2 nearby tiles so we can connect sequences.
-	    if (margin === undefined) { margin = 2; }
+	  return action;
+	}
 
-	    loadTiles$2('bubbles', bubbleApi, projection, margin);
-	  },
+	//
+	// First choose a node to be the survivor, with preference given
+	// to an existing (not new) node.
+	//
+	// Tags and relation memberships of of non-surviving nodes are merged
+	// to the survivor.
+	//
+	// This is the inverse of `iD.actionDisconnect`.
+	//
+	// Reference:
+	//   https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MergeNodesAction.as
+	//   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/MergeNodesAction.java
+	//
 
+	function actionConnect(nodeIDs) {
+	  var action = function action(graph) {
+	    var survivor;
+	    var node;
+	    var parents;
+	    var i, j; // Choose a survivor node, prefer an existing (not new) node - #4974
 
-	  viewer: function() {
-	    return _pannellumViewer;
-	  },
+	    for (i = 0; i < nodeIDs.length; i++) {
+	      survivor = graph.entity(nodeIDs[i]);
+	      if (survivor.version) break; // found one
+	    } // Replace all non-surviving nodes with the survivor and merge tags.
 
 
-	  initViewer: function () {
-	    if (!window.pannellum) { return; }
-	    if (_pannellumViewer) { return; }
+	    for (i = 0; i < nodeIDs.length; i++) {
+	      node = graph.entity(nodeIDs[i]);
+	      if (node.id === survivor.id) continue;
+	      parents = graph.parentWays(node);
 
-	    var sceneID = ++_currScene + '';
-	    var options = {
-	      'default': { firstScene: sceneID },
-	      scenes: {}
-	    };
-	    options.scenes[sceneID] = _sceneOptions;
+	      for (j = 0; j < parents.length; j++) {
+	        graph = graph.replace(parents[j].replaceNode(node.id, survivor.id));
+	      }
 
-	    _pannellumViewer = window.pannellum.viewer('ideditor-viewer-streetside', options);
-	  },
+	      parents = graph.parentRelations(node);
 
+	      for (j = 0; j < parents.length; j++) {
+	        graph = graph.replace(parents[j].replaceMember(node, survivor));
+	      }
 
-	  /**
-	   * loadViewer() create the streeside viewer.
-	   */
-	  loadViewer: function(context) {
-	    var that = this;
+	      survivor = survivor.mergeTags(node.tags);
+	      graph = actionDeleteNode(node.id)(graph);
+	    }
 
-	    var pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	    graph = graph.replace(survivor); // find and delete any degenerate ways created by connecting adjacent vertices
 
-	    // create ms-wrapper, a photo wrapper class
-	    var wrap = context.container().select('.photoviewer').selectAll('.ms-wrapper')
-	      .data([0]);
+	    parents = graph.parentWays(survivor);
 
-	    // inject ms-wrapper into the photoviewer div
-	    // (used by all to house each custom photo viewer)
-	    var wrapEnter = wrap.enter()
-	      .append('div')
-	      .attr('class', 'photo-wrapper ms-wrapper')
-	      .classed('hide', true);
-
-	    // inject div to support streetside viewer (pannellum) and attribution line
-	    wrapEnter
-	      .append('div')
-	      .attr('id', 'ideditor-viewer-streetside')
-	      .on(pointerPrefix + 'down.streetside', function () {
-	        select(window)
-	          .on(pointerPrefix + 'move.streetside', function () {
-	            dispatch$7.call('viewerChanged');
-	          }, true);
-	      })
-	      .on(pointerPrefix + 'up.streetside pointercancel.streetside', function () {
-	        select(window)
-	          .on(pointerPrefix + 'move.streetside', null);
-
-	        // continue dispatching events for a few seconds, in case viewer has inertia.
-	        var t = timer(function (elapsed) {
-	          dispatch$7.call('viewerChanged');
-	          if (elapsed > 2000) {
-	            t.stop();
-	          }
-	        });
-	      })
-	      .append('div')
-	      .attr('class', 'photo-attribution fillD');
-
-	    var controlsEnter = wrapEnter
-	      .append('div')
-	      .attr('class', 'photo-controls-wrap')
-	      .append('div')
-	      .attr('class', 'photo-controls');
-
-	    controlsEnter
-	      .append('button')
-	      .on('click.back', step(-1))
-	      .text('◄');
-
-	    controlsEnter
-	      .append('button')
-	      .on('click.forward', step(1))
-	      .text('►');
-
-
-	    // create working canvas for stitching together images
-	    wrap = wrap
-	      .merge(wrapEnter)
-	      .call(setupCanvas, true);
-
-	    // load streetside pannellum viewer css
-	    select('head').selectAll('#ideditor-streetside-viewercss')
-	      .data([0])
-	      .enter()
-	      .append('link')
-	      .attr('id', 'ideditor-streetside-viewercss')
-	      .attr('rel', 'stylesheet')
-	      .attr('href', context.asset(pannellumViewerCSS));
-
-	    // load streetside pannellum viewer js
-	    select('head').selectAll('#ideditor-streetside-viewerjs')
-	      .data([0])
-	      .enter()
-	      .append('script')
-	      .attr('id', 'ideditor-streetside-viewerjs')
-	      .attr('src', context.asset(pannellumViewerJS));
-
-
-	    // Register viewer resize handler
-	    context.ui().photoviewer.on('resize.streetside', function () {
-	      if (_pannellumViewer) {
-	        _pannellumViewer.resize();
+	    for (i = 0; i < parents.length; i++) {
+	      if (parents[i].isDegenerate()) {
+	        graph = actionDeleteWay(parents[i].id)(graph);
 	      }
-	    });
+	    }
 
+	    return graph;
+	  };
 
-	    function step(stepBy) {
-	      return function () {
-	        var viewer = context.container().select('.photoviewer');
-	        var selected = viewer.empty() ? undefined : viewer.datum();
-	        if (!selected) { return; }
+	  action.disabled = function (graph) {
+	    var seen = {};
+	    var restrictionIDs = [];
+	    var survivor;
+	    var node, way;
+	    var relations, relation, role;
+	    var i, j, k; // Choose a survivor node, prefer an existing (not new) node - #4974
 
-	        var nextID = (stepBy === 1 ? selected.ne : selected.pr);
-	        var yaw = _pannellumViewer.getYaw();
-	        var ca = selected.ca + yaw;
-	        var origin = selected.loc;
+	    for (i = 0; i < nodeIDs.length; i++) {
+	      survivor = graph.entity(nodeIDs[i]);
+	      if (survivor.version) break; // found one
+	    } // 1. disable if the nodes being connected have conflicting relation roles
 
-	        // construct a search trapezoid pointing out from current bubble
-	        var meters = 35;
-	        var p1 = [
-	          origin[0] + geoMetersToLon(meters / 5, origin[1]),
-	          origin[1]
-	        ];
-	        var p2 = [
-	          origin[0] + geoMetersToLon(meters / 2, origin[1]),
-	          origin[1] + geoMetersToLat(meters)
-	        ];
-	        var p3 = [
-	          origin[0] - geoMetersToLon(meters / 2, origin[1]),
-	          origin[1] + geoMetersToLat(meters)
-	        ];
-	        var p4 = [
-	          origin[0] - geoMetersToLon(meters / 5, origin[1]),
-	          origin[1]
-	        ];
 
-	        var poly = [p1, p2, p3, p4, p1];
+	    for (i = 0; i < nodeIDs.length; i++) {
+	      node = graph.entity(nodeIDs[i]);
+	      relations = graph.parentRelations(node);
 
-	        // rotate it to face forward/backward
-	        var angle = (stepBy === 1 ? ca : ca + 180) * (Math.PI / 180);
-	        poly = geoRotate(poly, -angle, origin);
+	      for (j = 0; j < relations.length; j++) {
+	        relation = relations[j];
+	        role = relation.memberById(node.id).role || ''; // if this node is a via node in a restriction, remember for later
 
-	        var extent = poly.reduce(function (extent, point) {
-	          return extent.extend(geoExtent(point));
-	        }, geoExtent());
+	        if (relation.hasFromViaTo()) {
+	          restrictionIDs.push(relation.id);
+	        }
 
-	        // find nearest other bubble in the search polygon
-	        var minDist = Infinity;
-	        _ssCache.bubbles.rtree.search(extent.bbox())
-	          .forEach(function (d) {
-	            if (d.data.key === selected.key) { return; }
-	            if (!geoPointInPolygon(d.data.loc, poly)) { return; }
-
-	            var dist = geoVecLength(d.data.loc, selected.loc);
-	            var theta = selected.ca - d.data.ca;
-	            var minTheta = Math.min(Math.abs(theta), 360 - Math.abs(theta));
-	            if (minTheta > 20) {
-	              dist += 5;  // penalize distance if camera angles don't match
-	            }
+	        if (seen[relation.id] !== undefined && seen[relation.id] !== role) {
+	          return 'relation';
+	        } else {
+	          seen[relation.id] = role;
+	        }
+	      }
+	    } // gather restrictions for parent ways
 
-	            if (dist < minDist) {
-	              nextID = d.data.key;
-	              minDist = dist;
-	            }
-	          });
 
-	        var nextBubble = nextID && _ssCache.bubbles.points[nextID];
-	        if (!nextBubble) { return; }
+	    for (i = 0; i < nodeIDs.length; i++) {
+	      node = graph.entity(nodeIDs[i]);
+	      var parents = graph.parentWays(node);
 
-	        context.map().centerEase(nextBubble.loc);
+	      for (j = 0; j < parents.length; j++) {
+	        var parent = parents[j];
+	        relations = graph.parentRelations(parent);
 
-	        that.selectImage(context, nextBubble)
-	          .then(function (response) {
-	            if (response.status === 'ok') {
-	              _sceneOptions.yaw = yaw;
-	              that.showViewer(context);
-	            }
-	          });
-	      };
-	    }
-	  },
+	        for (k = 0; k < relations.length; k++) {
+	          relation = relations[k];
 
+	          if (relation.hasFromViaTo()) {
+	            restrictionIDs.push(relation.id);
+	          }
+	        }
+	      }
+	    } // test restrictions
 
-	  /**
-	   * showViewer()
-	   */
-	  showViewer: function(context, yaw) {
-	    if (!_sceneOptions) { return; }
 
-	    if (yaw !== undefined) {
-	      _sceneOptions.yaw = yaw;
-	    }
+	    restrictionIDs = utilArrayUniq(restrictionIDs);
 
-	    if (!_pannellumViewer) {
-	      this.initViewer();
-	    } else {
-	      // make a new scene
-	      var sceneID = ++_currScene + '';
-	      _pannellumViewer
-	        .addScene(sceneID, _sceneOptions)
-	        .loadScene(sceneID);
+	    for (i = 0; i < restrictionIDs.length; i++) {
+	      relation = graph.entity(restrictionIDs[i]);
+	      if (!relation.isComplete(graph)) continue;
+	      var memberWays = relation.members.filter(function (m) {
+	        return m.type === 'way';
+	      }).map(function (m) {
+	        return graph.entity(m.id);
+	      });
+	      memberWays = utilArrayUniq(memberWays);
+	      var f = relation.memberByRole('from');
+	      var t = relation.memberByRole('to');
+	      var isUturn = f.id === t.id; // 2a. disable if connection would damage a restriction
+	      // (a key node is a node at the junction of ways)
+
+	      var nodes = {
+	        from: [],
+	        via: [],
+	        to: [],
+	        keyfrom: [],
+	        keyto: []
+	      };
 
-	      // remove previous scene
-	      if (_currScene > 2) {
-	        sceneID = (_currScene - 1) + '';
-	        _pannellumViewer
-	          .removeScene(sceneID);
+	      for (j = 0; j < relation.members.length; j++) {
+	        collectNodes(relation.members[j], nodes);
 	      }
-	    }
-
-	    var wrap = context.container().select('.photoviewer')
-	      .classed('hide', false);
-
-	    var isHidden = wrap.selectAll('.photo-wrapper.ms-wrapper.hide').size();
 
-	    if (isHidden) {
-	      wrap
-	        .selectAll('.photo-wrapper:not(.ms-wrapper)')
-	        .classed('hide', true);
+	      nodes.keyfrom = utilArrayUniq(nodes.keyfrom.filter(hasDuplicates));
+	      nodes.keyto = utilArrayUniq(nodes.keyto.filter(hasDuplicates));
+	      var filter = keyNodeFilter(nodes.keyfrom, nodes.keyto);
+	      nodes.from = nodes.from.filter(filter);
+	      nodes.via = nodes.via.filter(filter);
+	      nodes.to = nodes.to.filter(filter);
+	      var connectFrom = false;
+	      var connectVia = false;
+	      var connectTo = false;
+	      var connectKeyFrom = false;
+	      var connectKeyTo = false;
 
-	      wrap
-	        .selectAll('.photo-wrapper.ms-wrapper')
-	        .classed('hide', false);
-	    }
+	      for (j = 0; j < nodeIDs.length; j++) {
+	        var n = nodeIDs[j];
 
-	    return this;
-	  },
+	        if (nodes.from.indexOf(n) !== -1) {
+	          connectFrom = true;
+	        }
 
+	        if (nodes.via.indexOf(n) !== -1) {
+	          connectVia = true;
+	        }
 
-	  /**
-	   * hideViewer()
-	   */
-	  hideViewer: function (context) {
-	    var viewer = context.container().select('.photoviewer');
-	    if (!viewer.empty()) { viewer.datum(null); }
+	        if (nodes.to.indexOf(n) !== -1) {
+	          connectTo = true;
+	        }
 
-	    viewer
-	      .classed('hide', true)
-	      .selectAll('.photo-wrapper')
-	      .classed('hide', true);
+	        if (nodes.keyfrom.indexOf(n) !== -1) {
+	          connectKeyFrom = true;
+	        }
 
-	    context.container().selectAll('.viewfield-group, .sequence, .icon-sign')
-	      .classed('currentView', false);
+	        if (nodes.keyto.indexOf(n) !== -1) {
+	          connectKeyTo = true;
+	        }
+	      }
 
-	    return this.setStyles(context, null, true);
-	  },
+	      if (connectFrom && connectTo && !isUturn) {
+	        return 'restriction';
+	      }
 
+	      if (connectFrom && connectVia) {
+	        return 'restriction';
+	      }
 
-	  /**
-	   * selectImage().
-	   */
-	  selectImage: function (context, d) {
-	    var that = this;
-	    var viewer = context.container().select('.photoviewer');
-	    if (!viewer.empty()) { viewer.datum(d); }
+	      if (connectTo && connectVia) {
+	        return 'restriction';
+	      } // connecting to a key node -
+	      // if both nodes are on a member way (i.e. part of the turn restriction),
+	      // the connecting node must be adjacent to the key node.
 
-	    this.setStyles(context, null, true);
 
-	    var wrap = context.container().select('.photoviewer .ms-wrapper');
-	    var attribution = wrap.selectAll('.photo-attribution').html('');
+	      if (connectKeyFrom || connectKeyTo) {
+	        if (nodeIDs.length !== 2) {
+	          return 'restriction';
+	        }
 
-	    wrap.selectAll('.pnlm-load-box')   // display "loading.."
-	      .style('display', 'block');
+	        var n0 = null;
+	        var n1 = null;
 
-	    if (!d) {
-	      return Promise.resolve({ status: 'ok' });
-	    }
+	        for (j = 0; j < memberWays.length; j++) {
+	          way = memberWays[j];
 
-	    var line1 = attribution
-	      .append('div')
-	      .attr('class', 'attribution-row');
+	          if (way.contains(nodeIDs[0])) {
+	            n0 = nodeIDs[0];
+	          }
 
-	    var hiresDomId = utilUniqueDomId('streetside-hires');
+	          if (way.contains(nodeIDs[1])) {
+	            n1 = nodeIDs[1];
+	          }
+	        }
 
-	    // Add hires checkbox
-	    var label = line1
-	      .append('label')
-	      .attr('for', hiresDomId)
-	      .attr('class', 'streetside-hires');
+	        if (n0 && n1) {
+	          // both nodes are part of the restriction
+	          var ok = false;
 
-	    label
-	      .append('input')
-	      .attr('type', 'checkbox')
-	      .attr('id', hiresDomId)
-	      .property('checked', _hires)
-	      .on('click', function () {
-	        event.stopPropagation();
+	          for (j = 0; j < memberWays.length; j++) {
+	            way = memberWays[j];
 
-	        _hires = !_hires;
-	        _resolution = _hires ? 1024 : 512;
-	        wrap.call(setupCanvas, true);
+	            if (way.areAdjacent(n0, n1)) {
+	              ok = true;
+	              break;
+	            }
+	          }
 
-	        var viewstate = {
-	          yaw: _pannellumViewer.getYaw(),
-	          pitch: _pannellumViewer.getPitch(),
-	          hfov: _pannellumViewer.getHfov()
-	        };
+	          if (!ok) {
+	            return 'restriction';
+	          }
+	        }
+	      } // 2b. disable if nodes being connected will destroy a member way in a restriction
+	      // (to test, make a copy and try actually connecting the nodes)
 
-	        that.selectImage(context, d)
-	          .then(function (response) {
-	            if (response.status === 'ok') {
-	              _sceneOptions = Object.assign(_sceneOptions, viewstate);
-	              that.showViewer(context);
-	            }
-	          });
-	      });
 
-	    label
-	      .append('span')
-	      .text(_t('streetside.hires'));
+	      for (j = 0; j < memberWays.length; j++) {
+	        way = memberWays[j].update({}); // make copy
 
+	        for (k = 0; k < nodeIDs.length; k++) {
+	          if (nodeIDs[k] === survivor.id) continue;
 
-	    var captureInfo = line1
-	      .append('div')
-	      .attr('class', 'attribution-capture-info');
+	          if (way.areAdjacent(nodeIDs[k], survivor.id)) {
+	            way = way.removeNode(nodeIDs[k]);
+	          } else {
+	            way = way.replaceNode(nodeIDs[k], survivor.id);
+	          }
+	        }
 
-	    // Add capture date
-	    if (d.captured_by) {
-	      var yyyy = (new Date()).getFullYear();
+	        if (way.isDegenerate()) {
+	          return 'restriction';
+	        }
+	      }
+	    }
 
-	      captureInfo
-	        .append('a')
-	        .attr('class', 'captured_by')
-	        .attr('target', '_blank')
-	        .attr('href', 'https://www.microsoft.com/en-us/maps/streetside')
-	        .text('©' + yyyy + ' Microsoft');
+	    return false; // if a key node appears multiple times (indexOf !== lastIndexOf) it's a FROM-VIA or TO-VIA junction
 
-	      captureInfo
-	        .append('span')
-	        .text('|');
+	    function hasDuplicates(n, i, arr) {
+	      return arr.indexOf(n) !== arr.lastIndexOf(n);
 	    }
 
-	    if (d.captured_at) {
-	      captureInfo
-	        .append('span')
-	        .attr('class', 'captured_at')
-	        .text(localeTimestamp(d.captured_at));
+	    function keyNodeFilter(froms, tos) {
+	      return function (n) {
+	        return froms.indexOf(n) === -1 && tos.indexOf(n) === -1;
+	      };
 	    }
 
-	    // Add image links
-	    var line2 = attribution
-	      .append('div')
-	      .attr('class', 'attribution-row');
+	    function collectNodes(member, collection) {
+	      var entity = graph.hasEntity(member.id);
+	      if (!entity) return;
+	      var role = member.role || '';
+
+	      if (!collection[role]) {
+	        collection[role] = [];
+	      }
 
-	    line2
-	      .append('a')
-	      .attr('class', 'image-view-link')
-	      .attr('target', '_blank')
-	      .attr('href', 'https://www.bing.com/maps?cp=' + d.loc[1] + '~' + d.loc[0] +
-	        '&lvl=17&dir=' + d.ca + '&style=x&v=2&sV=1')
-	      .text(_t('streetside.view_on_bing'));
+	      if (member.type === 'node') {
+	        collection[role].push(member.id);
 
-	    line2
-	      .append('a')
-	      .attr('class', 'image-report-link')
-	      .attr('target', '_blank')
-	      .attr('href', 'https://www.bing.com/maps/privacyreport/streetsideprivacyreport?bubbleid=' +
-	        encodeURIComponent(d.key) + '&focus=photo&lat=' + d.loc[1] + '&lng=' + d.loc[0] + '&z=17')
-	      .text(_t('streetside.report'));
+	        if (role === 'via') {
+	          collection.keyfrom.push(member.id);
+	          collection.keyto.push(member.id);
+	        }
+	      } else if (member.type === 'way') {
+	        collection[role].push.apply(collection[role], entity.nodes);
 
+	        if (role === 'from' || role === 'via') {
+	          collection.keyfrom.push(entity.first());
+	          collection.keyfrom.push(entity.last());
+	        }
 
-	    var bubbleIdQuadKey = d.key.toString(4);
-	    var paddingNeeded = 16 - bubbleIdQuadKey.length;
-	    for (var i = 0; i < paddingNeeded; i++) {
-	      bubbleIdQuadKey = '0' + bubbleIdQuadKey;
+	        if (role === 'to' || role === 'via') {
+	          collection.keyto.push(entity.first());
+	          collection.keyto.push(entity.last());
+	        }
+	      }
 	    }
-	    var imgUrlPrefix = streetsideImagesApi + 'hs' + bubbleIdQuadKey;
-	    var imgUrlSuffix = '.jpg?g=6338&n=z';
+	  };
 
-	    // Cubemap face code order matters here: front=01, right=02, back=03, left=10, up=11, down=12
-	    var faceKeys = ['01','02','03','10','11','12'];
+	  return action;
+	}
 
-	    // Map images to cube faces
-	    var quadKeys = getQuadKeys();
-	    var faces = faceKeys.map(function (faceKey) {
-	      return quadKeys.map(function (quadKey) {
-	        var xy = qkToXY(quadKey);
-	        return {
-	          face: faceKey,
-	          url: imgUrlPrefix + faceKey + quadKey + imgUrlSuffix,
-	          x: xy[0],
-	          y: xy[1]
-	        };
-	      });
+	function actionCopyEntities(ids, fromGraph) {
+	  var _copies = {};
+
+	  var action = function action(graph) {
+	    ids.forEach(function (id) {
+	      fromGraph.entity(id).copy(fromGraph, _copies);
 	    });
 
-	    return loadFaces(faces)
-	      .then(function () {
-	        _sceneOptions = {
-	          showFullscreenCtrl: false,
-	          autoLoad: true,
-	          compass: true,
-	          northOffset: d.ca,
-	          yaw: 0,
-	          minHfov: minHfov,
-	          maxHfov: maxHfov,
-	          hfov: defaultHfov,
-	          type: 'cubemap',
-	          cubeMap: [
-	            _dataUrlArray[0],
-	            _dataUrlArray[1],
-	            _dataUrlArray[2],
-	            _dataUrlArray[3],
-	            _dataUrlArray[4],
-	            _dataUrlArray[5]
-	          ]
-	        };
-	        return { status: 'ok' };
-	      });
-	  },
+	    for (var id in _copies) {
+	      graph = graph.replace(_copies[id]);
+	    }
 
+	    return graph;
+	  };
 
-	  getSequenceKeyForBubble: function(d) {
-	    return d && d.sequenceKey;
-	  },
+	  action.copies = function () {
+	    return _copies;
+	  };
 
+	  return action;
+	}
 
-	  // Updates the currently highlighted sequence and selected bubble.
-	  // Reset is only necessary when interacting with the viewport because
-	  // this implicitly changes the currently selected bubble/sequence
-	  setStyles: function (context, hovered, reset) {
-	    if (reset) {  // reset all layers
-	      context.container().selectAll('.viewfield-group')
-	        .classed('highlighted', false)
-	        .classed('hovered', false)
-	        .classed('currentView', false);
+	function actionDeleteMember(relationId, memberIndex) {
+	  return function (graph) {
+	    var relation = graph.entity(relationId).removeMember(memberIndex);
+	    graph = graph.replace(relation);
 
-	      context.container().selectAll('.sequence')
-	        .classed('highlighted', false)
-	        .classed('currentView', false);
+	    if (relation.isDegenerate()) {
+	      graph = actionDeleteRelation(relation.id)(graph);
 	    }
 
-	    var hoveredBubbleKey = hovered && hovered.key;
-	    var hoveredSequenceKey = this.getSequenceKeyForBubble(hovered);
-	    var hoveredSequence = hoveredSequenceKey && _ssCache.sequences[hoveredSequenceKey];
-	    var hoveredBubbleKeys =  (hoveredSequence && hoveredSequence.bubbles.map(function (d) { return d.key; })) || [];
-
-	    var viewer = context.container().select('.photoviewer');
-	    var selected = viewer.empty() ? undefined : viewer.datum();
-	    var selectedBubbleKey = selected && selected.key;
-	    var selectedSequenceKey = this.getSequenceKeyForBubble(selected);
-	    var selectedSequence = selectedSequenceKey && _ssCache.sequences[selectedSequenceKey];
-	    var selectedBubbleKeys = (selectedSequence && selectedSequence.bubbles.map(function (d) { return d.key; })) || [];
+	    return graph;
+	  };
+	}
 
-	    // highlight sibling viewfields on either the selected or the hovered sequences
-	    var highlightedBubbleKeys = utilArrayUnion(hoveredBubbleKeys, selectedBubbleKeys);
+	function actionDiscardTags(difference, discardTags) {
+	  discardTags = discardTags || {};
+	  return function (graph) {
+	    difference.modified().forEach(checkTags);
+	    difference.created().forEach(checkTags);
+	    return graph;
 
-	    context.container().selectAll('.layer-streetside-images .viewfield-group')
-	      .classed('highlighted', function (d) { return highlightedBubbleKeys.indexOf(d.key) !== -1; })
-	      .classed('hovered',     function (d) { return d.key === hoveredBubbleKey; })
-	      .classed('currentView', function (d) { return d.key === selectedBubbleKey; });
+	    function checkTags(entity) {
+	      var keys = Object.keys(entity.tags);
+	      var didDiscard = false;
+	      var tags = {};
 
-	    context.container().selectAll('.layer-streetside-images .sequence')
-	      .classed('highlighted', function (d) { return d.properties.key === hoveredSequenceKey; })
-	      .classed('currentView', function (d) { return d.properties.key === selectedSequenceKey; });
+	      for (var i = 0; i < keys.length; i++) {
+	        var k = keys[i];
 
-	    // update viewfields if needed
-	    context.container().selectAll('.viewfield-group .viewfield')
-	      .attr('d', viewfieldPath);
+	        if (discardTags[k] || !entity.tags[k]) {
+	          didDiscard = true;
+	        } else {
+	          tags[k] = entity.tags[k];
+	        }
+	      }
 
-	    function viewfieldPath() {
-	      var d = this.parentNode.__data__;
-	      if (d.pano && d.key !== selectedBubbleKey) {
-	        return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-	      } else {
-	        return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+	      if (didDiscard) {
+	        graph = graph.replace(entity.update({
+	          tags: tags
+	        }));
 	      }
 	    }
+	  };
+	}
 
-	    return this;
-	  },
-
-
-	  /**
-	   * cache().
-	   */
-	  cache: function () {
-	    return _ssCache;
-	  }
-	};
-
-	var apibase$4 = 'https://taginfo.openstreetmap.org/api/4/';
-	var _inflight$2 = {};
-	var _popularKeys = {};
-	var _taginfoCache = {};
-
-	var tag_sorts = {
-	    point: 'count_nodes',
-	    vertex: 'count_nodes',
-	    area: 'count_ways',
-	    line: 'count_ways'
-	};
-	var tag_sort_members = {
-	    point: 'count_node_members',
-	    vertex: 'count_node_members',
-	    area: 'count_way_members',
-	    line: 'count_way_members',
-	    relation: 'count_relation_members'
-	};
-	var tag_filters = {
-	    point: 'nodes',
-	    vertex: 'nodes',
-	    area: 'ways',
-	    line: 'ways'
-	};
-	var tag_members_fractions = {
-	    point: 'count_node_members_fraction',
-	    vertex: 'count_node_members_fraction',
-	    area: 'count_way_members_fraction',
-	    line: 'count_way_members_fraction',
-	    relation: 'count_relation_members_fraction'
-	};
-
+	//
+	// Optionally, disconnect only the given ways.
+	//
+	// For testing convenience, accepts an ID to assign to the (first) new node.
+	// Normally, this will be undefined and the way will automatically
+	// be assigned a new ID.
+	//
+	// This is the inverse of `iD.actionConnect`.
+	//
+	// Reference:
+	//   https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/UnjoinNodeAction.as
+	//   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/UnGlueAction.java
+	//
 
-	function sets(params, n, o) {
-	    if (params.geometry && o[params.geometry]) {
-	        params[n] = o[params.geometry];
-	    }
-	    return params;
-	}
+	function actionDisconnect(nodeId, newNodeId) {
+	  var wayIds;
+
+	  var action = function action(graph) {
+	    var node = graph.entity(nodeId);
+	    var connections = action.connections(graph);
+	    connections.forEach(function (connection) {
+	      var way = graph.entity(connection.wayID);
+	      var newNode = osmNode({
+	        id: newNodeId,
+	        loc: node.loc,
+	        tags: node.tags
+	      });
+	      graph = graph.replace(newNode);
+
+	      if (connection.index === 0 && way.isArea()) {
+	        // replace shared node with shared node..
+	        graph = graph.replace(way.replaceNode(way.nodes[0], newNode.id));
+	      } else if (way.isClosed() && connection.index === way.nodes.length - 1) {
+	        // replace closing node with new new node..
+	        graph = graph.replace(way.unclose().addNode(newNode.id));
+	      } else {
+	        // replace shared node with multiple new nodes..
+	        graph = graph.replace(way.updateNode(newNode.id, connection.index));
+	      }
+	    });
+	    return graph;
+	  };
 
+	  action.connections = function (graph) {
+	    var candidates = [];
+	    var keeping = false;
+	    var parentWays = graph.parentWays(graph.entity(nodeId));
+	    var way, waynode;
 
-	function setFilter(params) {
-	    return sets(params, 'filter', tag_filters);
-	}
+	    for (var i = 0; i < parentWays.length; i++) {
+	      way = parentWays[i];
 
+	      if (wayIds && wayIds.indexOf(way.id) === -1) {
+	        keeping = true;
+	        continue;
+	      }
 
-	function setSort(params) {
-	    return sets(params, 'sortname', tag_sorts);
-	}
+	      if (way.isArea() && way.nodes[0] === nodeId) {
+	        candidates.push({
+	          wayID: way.id,
+	          index: 0
+	        });
+	      } else {
+	        for (var j = 0; j < way.nodes.length; j++) {
+	          waynode = way.nodes[j];
 
+	          if (waynode === nodeId) {
+	            if (way.isClosed() && parentWays.length > 1 && wayIds && wayIds.indexOf(way.id) !== -1 && j === way.nodes.length - 1) {
+	              continue;
+	            }
 
-	function setSortMembers(params) {
-	    return sets(params, 'sortname', tag_sort_members);
-	}
+	            candidates.push({
+	              wayID: way.id,
+	              index: j
+	            });
+	          }
+	        }
+	      }
+	    }
 
+	    return keeping ? candidates : candidates.slice(1);
+	  };
 
-	function clean(params) {
-	    return utilObjectOmit(params, ['geometry', 'debounce']);
-	}
+	  action.disabled = function (graph) {
+	    var connections = action.connections(graph);
+	    if (connections.length === 0) return 'not_connected';
+	    var parentWays = graph.parentWays(graph.entity(nodeId));
+	    var seenRelationIds = {};
+	    var sharedRelation;
+	    parentWays.forEach(function (way) {
+	      var relations = graph.parentRelations(way);
+	      relations.forEach(function (relation) {
+	        if (relation.id in seenRelationIds) {
+	          if (wayIds) {
+	            if (wayIds.indexOf(way.id) !== -1 || wayIds.indexOf(seenRelationIds[relation.id]) !== -1) {
+	              sharedRelation = relation;
+	            }
+	          } else {
+	            sharedRelation = relation;
+	          }
+	        } else {
+	          seenRelationIds[relation.id] = way.id;
+	        }
+	      });
+	    });
+	    if (sharedRelation) return 'relation';
+	  };
 
+	  action.limitWays = function (val) {
+	    if (!arguments.length) return wayIds;
+	    wayIds = val;
+	    return action;
+	  };
 
-	function filterKeys(type) {
-	    var count_type = type ? 'count_' + type : 'count_all';
-	    return function(d) {
-	        return parseFloat(d[count_type]) > 2500 || d.in_wiki;
-	    };
+	  return action;
 	}
 
+	function actionExtract(entityID, projection) {
+	  var extractedNodeID;
 
-	function filterMultikeys(prefix) {
-	    return function(d) {
-	        // d.key begins with prefix, and d.key contains no additional ':'s
-	        var re = new RegExp('^' + prefix + '(.*)$');
-	        var matches = d.key.match(re) || [];
-	        return (matches.length === 2 && matches[1].indexOf(':') === -1);
-	    };
-	}
+	  var action = function action(graph) {
+	    var entity = graph.entity(entityID);
 
+	    if (entity.type === 'node') {
+	      return extractFromNode(entity, graph);
+	    }
 
-	function filterValues(allowUpperCase) {
-	    return function(d) {
-	        if (d.value.match(/[;,]/) !== null) { return false; }  // exclude some punctuation
-	        if (!allowUpperCase && d.value.match(/[A-Z*]/) !== null) { return false; }  // exclude uppercase letters
-	        return parseFloat(d.fraction) > 0.0;
-	    };
-	}
+	    return extractFromWayOrRelation(entity, graph);
+	  };
 
+	  function extractFromNode(node, graph) {
+	    extractedNodeID = node.id; // Create a new node to replace the one we will detach
 
-	function filterRoles(geometry) {
-	    return function(d) {
-	        if (d.role === '') { return false; } // exclude empty role
-	        if (d.role.match(/[A-Z*;,]/) !== null) { return false; }  // exclude uppercase letters and some punctuation
-	        return parseFloat(d[tag_members_fractions[geometry]]) > 0.0;
-	    };
-	}
+	    var replacement = osmNode({
+	      loc: node.loc
+	    });
+	    graph = graph.replace(replacement); // Process each way in turn, updating the graph as we go
 
+	    graph = graph.parentWays(node).reduce(function (accGraph, parentWay) {
+	      return accGraph.replace(parentWay.replaceNode(entityID, replacement.id));
+	    }, graph); // Process any relations too
 
-	function valKey(d) {
-	    return {
-	        value: d.key,
-	        title: d.key
-	    };
-	}
+	    return graph.parentRelations(node).reduce(function (accGraph, parentRel) {
+	      return accGraph.replace(parentRel.replaceMember(node, replacement));
+	    }, graph);
+	  }
 
+	  function extractFromWayOrRelation(entity, graph) {
+	    var fromGeometry = entity.geometry(graph);
+	    var keysToCopyAndRetain = ['source', 'wheelchair'];
+	    var keysToRetain = ['area'];
+	    var buildingKeysToRetain = ['architect', 'building', 'height', 'layer'];
+	    var extractedLoc = d3_geoPath(projection).centroid(entity.asGeoJSON(graph));
+	    extractedLoc = extractedLoc && projection.invert(extractedLoc);
 
-	function valKeyDescription(d) {
-	    var obj = {
-	        value: d.value,
-	        title: d.description || d.value
-	    };
-	    if (d.count) {
-	        obj.count = d.count;
+	    if (!extractedLoc || !isFinite(extractedLoc[0]) || !isFinite(extractedLoc[1])) {
+	      extractedLoc = entity.extent(graph).center();
 	    }
-	    return obj;
-	}
 
-
-	function roleKey(d) {
-	    return {
-	        value: d.role,
-	        title: d.role
+	    var indoorAreaValues = {
+	      area: true,
+	      corridor: true,
+	      elevator: true,
+	      level: true,
+	      room: true
 	    };
-	}
+	    var isBuilding = entity.tags.building && entity.tags.building !== 'no' || entity.tags['building:part'] && entity.tags['building:part'] !== 'no';
+	    var isIndoorArea = fromGeometry === 'area' && entity.tags.indoor && indoorAreaValues[entity.tags.indoor];
+	    var entityTags = Object.assign({}, entity.tags); // shallow copy
 
+	    var pointTags = {};
 
-	// sort keys with ':' lower than keys without ':'
-	function sortKeys(a, b) {
-	    return (a.key.indexOf(':') === -1 && b.key.indexOf(':') !== -1) ? -1
-	        : (a.key.indexOf(':') !== -1 && b.key.indexOf(':') === -1) ? 1
-	        : 0;
-	}
+	    for (var key in entityTags) {
+	      if (entity.type === 'relation' && key === 'type') {
+	        continue;
+	      }
 
+	      if (keysToRetain.indexOf(key) !== -1) {
+	        continue;
+	      }
 
-	var debouncedRequest$1 = debounce(request$1, 300, { leading: false });
+	      if (isBuilding) {
+	        // don't transfer building-related tags
+	        if (buildingKeysToRetain.indexOf(key) !== -1 || key.match(/^building:.{1,}/) || key.match(/^roof:.{1,}/)) continue;
+	      } // leave `indoor` tag on the area
 
-	function request$1(url, params, exactMatch, callback, loaded) {
-	    if (_inflight$2[url]) { return; }
 
-	    if (checkCache(url, params, exactMatch, callback)) { return; }
+	      if (isIndoorArea && key === 'indoor') {
+	        continue;
+	      } // copy the tag from the entity to the point
 
-	    var controller = new AbortController();
-	    _inflight$2[url] = controller;
 
-	    d3_json(url, { signal: controller.signal })
-	        .then(function(result) {
-	            delete _inflight$2[url];
-	            if (loaded) { loaded(null, result); }
-	        })
-	        .catch(function(err) {
-	            delete _inflight$2[url];
-	            if (err.name === 'AbortError') { return; }
-	            if (loaded) { loaded(err.message); }
-	        });
-	}
+	      pointTags[key] = entityTags[key]; // leave addresses and some other tags so they're on both features
 
+	      if (keysToCopyAndRetain.indexOf(key) !== -1 || key.match(/^addr:.{1,}/)) {
+	        continue;
+	      } else if (isIndoorArea && key === 'level') {
+	        // leave `level` on both features
+	        continue;
+	      } // remove the tag from the entity
 
-	function checkCache(url, params, exactMatch, callback) {
-	    var rp = params.rp || 25;
-	    var testQuery = params.query || '';
-	    var testUrl = url;
 
-	    do {
-	        var hit = _taginfoCache[testUrl];
+	      delete entityTags[key];
+	    }
 
-	        // exact match, or shorter match yielding fewer than max results (rp)
-	        if (hit && (url === testUrl || hit.length < rp)) {
-	            callback(null, hit);
-	            return true;
-	        }
+	    if (!isBuilding && !isIndoorArea && fromGeometry === 'area') {
+	      // ensure that areas keep area geometry
+	      entityTags.area = 'yes';
+	    }
 
-	        // don't try to shorten the query
-	        if (exactMatch || !testQuery.length) { return false; }
+	    var replacement = osmNode({
+	      loc: extractedLoc,
+	      tags: pointTags
+	    });
+	    graph = graph.replace(replacement);
+	    extractedNodeID = replacement.id;
+	    return graph.replace(entity.update({
+	      tags: entityTags
+	    }));
+	  }
 
-	        // do shorten the query to see if we already have a cached result
-	        // that has returned fewer than max results (rp)
-	        testQuery = testQuery.slice(0, -1);
-	        testUrl = url.replace(/&query=(.*?)&/, '&query=' + testQuery + '&');
-	    } while (testQuery.length >= 0);
+	  action.getExtractedNodeID = function () {
+	    return extractedNodeID;
+	  };
 
-	    return false;
+	  return action;
 	}
 
+	//
+	// This is the inverse of `iD.actionSplit`.
+	//
+	// Reference:
+	//   https://github.com/systemed/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MergeWaysAction.as
+	//   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/CombineWayAction.java
+	//
 
-	var serviceTaginfo = {
-
-	    init: function() {
-	        _inflight$2 = {};
-	        _taginfoCache = {};
-	        _popularKeys = {
-	            // manually exclude some keys – #5377, #7485
-	            postal_code: true,
-	            full_name: true,
-	            loc_name: true,
-	            reg_name: true,
-	            short_name: true,
-	            sorting_name: true,
-	            artist_name: true,
-	            nat_name: true,
-	            long_name: true,
-	            'bridge:name': true
-	        };
+	function actionJoin(ids) {
+	  function groupEntitiesByGeometry(graph) {
+	    var entities = ids.map(function (id) {
+	      return graph.entity(id);
+	    });
+	    return Object.assign({
+	      line: []
+	    }, utilArrayGroupBy(entities, function (entity) {
+	      return entity.geometry(graph);
+	    }));
+	  }
+
+	  var action = function action(graph) {
+	    var ways = ids.map(graph.entity, graph); // if any of the ways are sided (e.g. coastline, cliff, kerb)
+	    // sort them first so they establish the overall order - #6033
+
+	    ways.sort(function (a, b) {
+	      var aSided = a.isSided();
+	      var bSided = b.isSided();
+	      return aSided && !bSided ? -1 : bSided && !aSided ? 1 : 0;
+	    }); // Prefer to keep an existing way.
+	    // if there are multiple existing ways, keep the oldest one
+	    // the oldest way is determined by the ID of the way
+
+	    var survivorID = (ways.filter(function (way) {
+	      return !way.isNew();
+	    }).sort(function (a, b) {
+	      return +a.osmId() - +b.osmId();
+	    })[0] || ways[0]).id;
+	    var sequences = osmJoinWays(ways, graph);
+	    var joined = sequences[0]; // We might need to reverse some of these ways before joining them.  #4688
+	    // `joined.actions` property will contain any actions we need to apply.
+
+	    graph = sequences.actions.reduce(function (g, action) {
+	      return action(g);
+	    }, graph);
+	    var survivor = graph.entity(survivorID);
+	    survivor = survivor.update({
+	      nodes: joined.nodes.map(function (n) {
+	        return n.id;
+	      })
+	    });
+	    graph = graph.replace(survivor);
+	    joined.forEach(function (way) {
+	      if (way.id === survivorID) return;
+	      graph.parentRelations(way).forEach(function (parent) {
+	        graph = graph.replace(parent.replaceMember(way, survivor));
+	      });
+	      survivor = survivor.mergeTags(way.tags);
+	      graph = graph.replace(survivor);
+	      graph = actionDeleteWay(way.id)(graph);
+	    }); // Finds if the join created a single-member multipolygon,
+	    // and if so turns it into a basic area instead
+
+	    function checkForSimpleMultipolygon() {
+	      if (!survivor.isClosed()) return;
+	      var multipolygons = graph.parentMultipolygons(survivor).filter(function (multipolygon) {
+	        // find multipolygons where the survivor is the only member
+	        return multipolygon.members.length === 1;
+	      }); // skip if this is the single member of multiple multipolygons
+
+	      if (multipolygons.length !== 1) return;
+	      var multipolygon = multipolygons[0];
+
+	      for (var key in survivor.tags) {
+	        if (multipolygon.tags[key] && // don't collapse if tags cannot be cleanly merged
+	        multipolygon.tags[key] !== survivor.tags[key]) return;
+	      }
 
-	        // Fetch popular keys.  We'll exclude these from `values`
-	        // lookups because they stress taginfo, and they aren't likely
-	        // to yield meaningful autocomplete results.. see #3955
-	        var params = {
-	            rp: 100,
-	            sortname: 'values_all',
-	            sortorder: 'desc',
-	            page: 1,
-	            debounce: false,
-	            lang: _mainLocalizer.languageCode()
-	        };
-	        this.keys(params, function(err, data) {
-	            if (err) { return; }
-	            data.forEach(function(d) {
-	                if (d.value === 'opening_hours') { return; }  // exception
-	                _popularKeys[d.value] = true;
-	            });
-	        });
-	    },
+	      survivor = survivor.mergeTags(multipolygon.tags);
+	      graph = graph.replace(survivor);
+	      graph = actionDeleteRelation(multipolygon.id, true
+	      /* allow untagged members */
+	      )(graph);
+	      var tags = Object.assign({}, survivor.tags);
 
+	      if (survivor.geometry(graph) !== 'area') {
+	        // ensure the feature persists as an area
+	        tags.area = 'yes';
+	      }
 
-	    reset: function() {
-	        Object.values(_inflight$2).forEach(function(controller) { controller.abort(); });
-	        _inflight$2 = {};
-	    },
+	      delete tags.type; // remove type=multipolygon
 
+	      survivor = survivor.update({
+	        tags: tags
+	      });
+	      graph = graph.replace(survivor);
+	    }
 
-	    keys: function(params, callback) {
-	        var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-	        params = clean(setSort(params));
-	        params = Object.assign({
-	            rp: 10,
-	            sortname: 'count_all',
-	            sortorder: 'desc',
-	            page: 1,
-	            lang: _mainLocalizer.languageCode()
-	        }, params);
+	    checkForSimpleMultipolygon();
+	    return graph;
+	  }; // Returns the number of nodes the resultant way is expected to have
 
-	        var url = apibase$4 + 'keys/all?' + utilQsString(params);
-	        doRequest(url, params, false, callback, function(err, d) {
-	            if (err) {
-	                callback(err);
-	            } else {
-	                var f = filterKeys(params.filter);
-	                var result = d.data.filter(f).sort(sortKeys).map(valKey);
-	                _taginfoCache[url] = result;
-	                callback(null, result);
-	            }
-	        });
-	    },
 
+	  action.resultingWayNodesLength = function (graph) {
+	    return ids.reduce(function (count, id) {
+	      return count + graph.entity(id).nodes.length;
+	    }, 0) - ids.length - 1;
+	  };
 
-	    multikeys: function(params, callback) {
-	        var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-	        params = clean(setSort(params));
-	        params = Object.assign({
-	            rp: 25,
-	            sortname: 'count_all',
-	            sortorder: 'desc',
-	            page: 1,
-	            lang: _mainLocalizer.languageCode()
-	        }, params);
-
-	        var prefix = params.query;
-	        var url = apibase$4 + 'keys/all?' + utilQsString(params);
-	        doRequest(url, params, true, callback, function(err, d) {
-	            if (err) {
-	                callback(err);
-	            } else {
-	                var f = filterMultikeys(prefix);
-	                var result = d.data.filter(f).map(valKey);
-	                _taginfoCache[url] = result;
-	                callback(null, result);
-	            }
-	        });
-	    },
+	  action.disabled = function (graph) {
+	    var geometries = groupEntitiesByGeometry(graph);
 
+	    if (ids.length < 2 || ids.length !== geometries.line.length) {
+	      return 'not_eligible';
+	    }
 
-	    values: function(params, callback) {
-	        // Exclude popular keys from values lookups.. see #3955
-	        var key = params.key;
-	        if (key && _popularKeys[key]) {
-	            callback(null, []);
-	            return;
-	        }
+	    var joined = osmJoinWays(ids.map(graph.entity, graph), graph);
 
-	        var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-	        params = clean(setSort(setFilter(params)));
-	        params = Object.assign({
-	            rp: 25,
-	            sortname: 'count_all',
-	            sortorder: 'desc',
-	            page: 1,
-	            lang: _mainLocalizer.languageCode()
-	        }, params);
+	    if (joined.length > 1) {
+	      return 'not_adjacent';
+	    }
 
-	        var url = apibase$4 + 'key/values?' + utilQsString(params);
-	        doRequest(url, params, false, callback, function(err, d) {
-	            if (err) {
-	                callback(err);
-	            } else {
-	                // In most cases we prefer taginfo value results with lowercase letters.
-	                // A few OSM keys expect values to contain uppercase values (see #3377).
-	                // This is not an exhaustive list (e.g. `name` also has uppercase values)
-	                // but these are the fields where taginfo value lookup is most useful.
-	                var re = /network|taxon|genus|species|brand|grape_variety|royal_cypher|listed_status|booth|rating|stars|:output|_hours|_times|_ref|manufacturer|country|target|brewery/;
-	                var allowUpperCase = re.test(params.key);
-	                var f = filterValues(allowUpperCase);
-
-	                var result = d.data.filter(f).map(valKeyDescription);
-	                _taginfoCache[url] = result;
-	                callback(null, result);
-	            }
-	        });
-	    },
+	    var i; // All joined ways must belong to the same set of (non-restriction) relations.
+	    // Restriction relations have different logic, below, which allows some cases
+	    // this prohibits, and prohibits some cases this allows.
 
+	    var sortedParentRelations = function sortedParentRelations(id) {
+	      return graph.parentRelations(graph.entity(id)).filter(function (rel) {
+	        return !rel.isRestriction() && !rel.isConnectivity();
+	      }).sort(function (a, b) {
+	        return a.id - b.id;
+	      });
+	    };
 
-	    roles: function(params, callback) {
-	        var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-	        var geometry = params.geometry;
-	        params = clean(setSortMembers(params));
-	        params = Object.assign({
-	            rp: 25,
-	            sortname: 'count_all_members',
-	            sortorder: 'desc',
-	            page: 1,
-	            lang: _mainLocalizer.languageCode()
-	        }, params);
-
-	        var url = apibase$4 + 'relation/roles?' + utilQsString(params);
-	        doRequest(url, params, true, callback, function(err, d) {
-	            if (err) {
-	                callback(err);
-	            } else {
-	                var f = filterRoles(geometry);
-	                var result = d.data.filter(f).map(roleKey);
-	                _taginfoCache[url] = result;
-	                callback(null, result);
-	            }
-	        });
-	    },
+	    var relsA = sortedParentRelations(ids[0]);
 
+	    for (i = 1; i < ids.length; i++) {
+	      var relsB = sortedParentRelations(ids[i]);
 
-	    docs: function(params, callback) {
-	        var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-	        params = clean(setSort(params));
+	      if (!utilArrayIdentical(relsA, relsB)) {
+	        return 'conflicting_relations';
+	      }
+	    } // Loop through all combinations of path-pairs
+	    // to check potential intersections between all pairs
 
-	        var path = 'key/wiki_pages?';
-	        if (params.value) {
-	            path = 'tag/wiki_pages?';
-	        } else if (params.rtype) {
-	            path = 'relation/wiki_pages?';
-	        }
 
-	        var url = apibase$4 + path + utilQsString(params);
-	        doRequest(url, params, true, callback, function(err, d) {
-	            if (err) {
-	                callback(err);
-	            } else {
-	                _taginfoCache[url] = d.data;
-	                callback(null, d.data);
-	            }
+	    for (i = 0; i < ids.length - 1; i++) {
+	      for (var j = i + 1; j < ids.length; j++) {
+	        var path1 = graph.childNodes(graph.entity(ids[i])).map(function (e) {
+	          return e.loc;
 	        });
-	    },
-
-
-	    apibase: function(_) {
-	        if (!arguments.length) { return apibase$4; }
-	        apibase$4 = _;
-	        return this;
-	    }
+	        var path2 = graph.childNodes(graph.entity(ids[j])).map(function (e) {
+	          return e.loc;
+	        });
+	        var intersections = geoPathIntersections(path1, path2); // Check if intersections are just nodes lying on top of
+	        // each other/the line, as opposed to crossing it
 
-	};
+	        var common = utilArrayIntersection(joined[0].nodes.map(function (n) {
+	          return n.loc.toString();
+	        }), intersections.map(function (n) {
+	          return n.toString();
+	        }));
 
-	var helpers$1 = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-	/**
-	 * @module helpers
-	 */
-	/**
-	 * Earth Radius used with the Harvesine formula and approximates using a spherical (non-ellipsoid) Earth.
-	 *
-	 * @memberof helpers
-	 * @type {number}
-	 */
-	exports.earthRadius = 6371008.8;
-	/**
-	 * Unit of measurement factors using a spherical (non-ellipsoid) earth radius.
-	 *
-	 * @memberof helpers
-	 * @type {Object}
-	 */
-	exports.factors = {
-	    centimeters: exports.earthRadius * 100,
-	    centimetres: exports.earthRadius * 100,
-	    degrees: exports.earthRadius / 111325,
-	    feet: exports.earthRadius * 3.28084,
-	    inches: exports.earthRadius * 39.370,
-	    kilometers: exports.earthRadius / 1000,
-	    kilometres: exports.earthRadius / 1000,
-	    meters: exports.earthRadius,
-	    metres: exports.earthRadius,
-	    miles: exports.earthRadius / 1609.344,
-	    millimeters: exports.earthRadius * 1000,
-	    millimetres: exports.earthRadius * 1000,
-	    nauticalmiles: exports.earthRadius / 1852,
-	    radians: 1,
-	    yards: exports.earthRadius / 1.0936,
-	};
-	/**
-	 * Units of measurement factors based on 1 meter.
-	 *
-	 * @memberof helpers
-	 * @type {Object}
-	 */
-	exports.unitsFactors = {
-	    centimeters: 100,
-	    centimetres: 100,
-	    degrees: 1 / 111325,
-	    feet: 3.28084,
-	    inches: 39.370,
-	    kilometers: 1 / 1000,
-	    kilometres: 1 / 1000,
-	    meters: 1,
-	    metres: 1,
-	    miles: 1 / 1609.344,
-	    millimeters: 1000,
-	    millimetres: 1000,
-	    nauticalmiles: 1 / 1852,
-	    radians: 1 / exports.earthRadius,
-	    yards: 1 / 1.0936,
-	};
-	/**
-	 * Area of measurement factors based on 1 square meter.
-	 *
-	 * @memberof helpers
-	 * @type {Object}
-	 */
-	exports.areaFactors = {
-	    acres: 0.000247105,
-	    centimeters: 10000,
-	    centimetres: 10000,
-	    feet: 10.763910417,
-	    inches: 1550.003100006,
-	    kilometers: 0.000001,
-	    kilometres: 0.000001,
-	    meters: 1,
-	    metres: 1,
-	    miles: 3.86e-7,
-	    millimeters: 1000000,
-	    millimetres: 1000000,
-	    yards: 1.195990046,
-	};
-	/**
-	 * Wraps a GeoJSON {@link Geometry} in a GeoJSON {@link Feature}.
-	 *
-	 * @name feature
-	 * @param {Geometry} geometry input geometry
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature} a GeoJSON Feature
-	 * @example
-	 * var geometry = {
-	 *   "type": "Point",
-	 *   "coordinates": [110, 50]
-	 * };
-	 *
-	 * var feature = turf.feature(geometry);
-	 *
-	 * //=feature
-	 */
-	function feature(geom, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    var feat = { type: "Feature" };
-	    if (options.id === 0 || options.id) {
-	        feat.id = options.id;
-	    }
-	    if (options.bbox) {
-	        feat.bbox = options.bbox;
-	    }
-	    feat.properties = properties || {};
-	    feat.geometry = geom;
-	    return feat;
-	}
-	exports.feature = feature;
-	/**
-	 * Creates a GeoJSON {@link Geometry} from a Geometry string type & coordinates.
-	 * For GeometryCollection type use `helpers.geometryCollection`
-	 *
-	 * @name geometry
-	 * @param {string} type Geometry Type
-	 * @param {Array<any>} coordinates Coordinates
-	 * @param {Object} [options={}] Optional Parameters
-	 * @returns {Geometry} a GeoJSON Geometry
-	 * @example
-	 * var type = "Point";
-	 * var coordinates = [110, 50];
-	 * var geometry = turf.geometry(type, coordinates);
-	 * // => geometry
-	 */
-	function geometry(type, coordinates, options) {
-	    switch (type) {
-	        case "Point": return point(coordinates).geometry;
-	        case "LineString": return lineString(coordinates).geometry;
-	        case "Polygon": return polygon(coordinates).geometry;
-	        case "MultiPoint": return multiPoint(coordinates).geometry;
-	        case "MultiLineString": return multiLineString(coordinates).geometry;
-	        case "MultiPolygon": return multiPolygon(coordinates).geometry;
-	        default: throw new Error(type + " is invalid");
-	    }
-	}
-	exports.geometry = geometry;
-	/**
-	 * Creates a {@link Point} {@link Feature} from a Position.
-	 *
-	 * @name point
-	 * @param {Array<number>} coordinates longitude, latitude position (each in decimal degrees)
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature<Point>} a Point feature
-	 * @example
-	 * var point = turf.point([-75.343, 39.984]);
-	 *
-	 * //=point
-	 */
-	function point(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    var geom = {
-	        type: "Point",
-	        coordinates: coordinates,
-	    };
-	    return feature(geom, properties, options);
-	}
-	exports.point = point;
-	/**
-	 * Creates a {@link Point} {@link FeatureCollection} from an Array of Point coordinates.
-	 *
-	 * @name points
-	 * @param {Array<Array<number>>} coordinates an array of Points
-	 * @param {Object} [properties={}] Translate these properties to each Feature
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north]
-	 * associated with the FeatureCollection
-	 * @param {string|number} [options.id] Identifier associated with the FeatureCollection
-	 * @returns {FeatureCollection<Point>} Point Feature
-	 * @example
-	 * var points = turf.points([
-	 *   [-75, 39],
-	 *   [-80, 45],
-	 *   [-78, 50]
-	 * ]);
-	 *
-	 * //=points
-	 */
-	function points(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    return featureCollection(coordinates.map(function (coords) {
-	        return point(coords, properties);
-	    }), options);
-	}
-	exports.points = points;
-	/**
-	 * Creates a {@link Polygon} {@link Feature} from an Array of LinearRings.
-	 *
-	 * @name polygon
-	 * @param {Array<Array<Array<number>>>} coordinates an array of LinearRings
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature<Polygon>} Polygon Feature
-	 * @example
-	 * var polygon = turf.polygon([[[-5, 52], [-4, 56], [-2, 51], [-7, 54], [-5, 52]]], { name: 'poly1' });
-	 *
-	 * //=polygon
-	 */
-	function polygon(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    for (var _i = 0, coordinates_1 = coordinates; _i < coordinates_1.length; _i++) {
-	        var ring = coordinates_1[_i];
-	        if (ring.length < 4) {
-	            throw new Error("Each LinearRing of a Polygon must have 4 or more Positions.");
-	        }
-	        for (var j = 0; j < ring[ring.length - 1].length; j++) {
-	            // Check if first point of Polygon contains two numbers
-	            if (ring[ring.length - 1][j] !== ring[0][j]) {
-	                throw new Error("First and last Position are not equivalent.");
-	            }
-	        }
-	    }
-	    var geom = {
-	        type: "Polygon",
-	        coordinates: coordinates,
-	    };
-	    return feature(geom, properties, options);
-	}
-	exports.polygon = polygon;
-	/**
-	 * Creates a {@link Polygon} {@link FeatureCollection} from an Array of Polygon coordinates.
-	 *
-	 * @name polygons
-	 * @param {Array<Array<Array<Array<number>>>>} coordinates an array of Polygon coordinates
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the FeatureCollection
-	 * @returns {FeatureCollection<Polygon>} Polygon FeatureCollection
-	 * @example
-	 * var polygons = turf.polygons([
-	 *   [[[-5, 52], [-4, 56], [-2, 51], [-7, 54], [-5, 52]]],
-	 *   [[[-15, 42], [-14, 46], [-12, 41], [-17, 44], [-15, 42]]],
-	 * ]);
-	 *
-	 * //=polygons
-	 */
-	function polygons(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    return featureCollection(coordinates.map(function (coords) {
-	        return polygon(coords, properties);
-	    }), options);
-	}
-	exports.polygons = polygons;
-	/**
-	 * Creates a {@link LineString} {@link Feature} from an Array of Positions.
-	 *
-	 * @name lineString
-	 * @param {Array<Array<number>>} coordinates an array of Positions
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature<LineString>} LineString Feature
-	 * @example
-	 * var linestring1 = turf.lineString([[-24, 63], [-23, 60], [-25, 65], [-20, 69]], {name: 'line 1'});
-	 * var linestring2 = turf.lineString([[-14, 43], [-13, 40], [-15, 45], [-10, 49]], {name: 'line 2'});
-	 *
-	 * //=linestring1
-	 * //=linestring2
-	 */
-	function lineString(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    if (coordinates.length < 2) {
-	        throw new Error("coordinates must be an array of two or more positions");
-	    }
-	    var geom = {
-	        type: "LineString",
-	        coordinates: coordinates,
-	    };
-	    return feature(geom, properties, options);
-	}
-	exports.lineString = lineString;
-	/**
-	 * Creates a {@link LineString} {@link FeatureCollection} from an Array of LineString coordinates.
-	 *
-	 * @name lineStrings
-	 * @param {Array<Array<Array<number>>>} coordinates an array of LinearRings
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north]
-	 * associated with the FeatureCollection
-	 * @param {string|number} [options.id] Identifier associated with the FeatureCollection
-	 * @returns {FeatureCollection<LineString>} LineString FeatureCollection
-	 * @example
-	 * var linestrings = turf.lineStrings([
-	 *   [[-24, 63], [-23, 60], [-25, 65], [-20, 69]],
-	 *   [[-14, 43], [-13, 40], [-15, 45], [-10, 49]]
-	 * ]);
-	 *
-	 * //=linestrings
-	 */
-	function lineStrings(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    return featureCollection(coordinates.map(function (coords) {
-	        return lineString(coords, properties);
-	    }), options);
-	}
-	exports.lineStrings = lineStrings;
-	/**
-	 * Takes one or more {@link Feature|Features} and creates a {@link FeatureCollection}.
-	 *
-	 * @name featureCollection
-	 * @param {Feature[]} features input features
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {FeatureCollection} FeatureCollection of Features
-	 * @example
-	 * var locationA = turf.point([-75.343, 39.984], {name: 'Location A'});
-	 * var locationB = turf.point([-75.833, 39.284], {name: 'Location B'});
-	 * var locationC = turf.point([-75.534, 39.123], {name: 'Location C'});
-	 *
-	 * var collection = turf.featureCollection([
-	 *   locationA,
-	 *   locationB,
-	 *   locationC
-	 * ]);
-	 *
-	 * //=collection
-	 */
-	function featureCollection(features, options) {
-	    if (options === void 0) { options = {}; }
-	    var fc = { type: "FeatureCollection" };
-	    if (options.id) {
-	        fc.id = options.id;
-	    }
-	    if (options.bbox) {
-	        fc.bbox = options.bbox;
-	    }
-	    fc.features = features;
-	    return fc;
-	}
-	exports.featureCollection = featureCollection;
-	/**
-	 * Creates a {@link Feature<MultiLineString>} based on a
-	 * coordinate array. Properties can be added optionally.
-	 *
-	 * @name multiLineString
-	 * @param {Array<Array<Array<number>>>} coordinates an array of LineStrings
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature<MultiLineString>} a MultiLineString feature
-	 * @throws {Error} if no coordinates are passed
-	 * @example
-	 * var multiLine = turf.multiLineString([[[0,0],[10,10]]]);
-	 *
-	 * //=multiLine
-	 */
-	function multiLineString(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    var geom = {
-	        type: "MultiLineString",
-	        coordinates: coordinates,
-	    };
-	    return feature(geom, properties, options);
-	}
-	exports.multiLineString = multiLineString;
-	/**
-	 * Creates a {@link Feature<MultiPoint>} based on a
-	 * coordinate array. Properties can be added optionally.
-	 *
-	 * @name multiPoint
-	 * @param {Array<Array<number>>} coordinates an array of Positions
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature<MultiPoint>} a MultiPoint feature
-	 * @throws {Error} if no coordinates are passed
-	 * @example
-	 * var multiPt = turf.multiPoint([[0,0],[10,10]]);
-	 *
-	 * //=multiPt
-	 */
-	function multiPoint(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    var geom = {
-	        type: "MultiPoint",
-	        coordinates: coordinates,
-	    };
-	    return feature(geom, properties, options);
-	}
-	exports.multiPoint = multiPoint;
-	/**
-	 * Creates a {@link Feature<MultiPolygon>} based on a
-	 * coordinate array. Properties can be added optionally.
-	 *
-	 * @name multiPolygon
-	 * @param {Array<Array<Array<Array<number>>>>} coordinates an array of Polygons
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature<MultiPolygon>} a multipolygon feature
-	 * @throws {Error} if no coordinates are passed
-	 * @example
-	 * var multiPoly = turf.multiPolygon([[[[0,0],[0,10],[10,10],[10,0],[0,0]]]]);
-	 *
-	 * //=multiPoly
-	 *
-	 */
-	function multiPolygon(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    var geom = {
-	        type: "MultiPolygon",
-	        coordinates: coordinates,
-	    };
-	    return feature(geom, properties, options);
-	}
-	exports.multiPolygon = multiPolygon;
-	/**
-	 * Creates a {@link Feature<GeometryCollection>} based on a
-	 * coordinate array. Properties can be added optionally.
-	 *
-	 * @name geometryCollection
-	 * @param {Array<Geometry>} geometries an array of GeoJSON Geometries
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature<GeometryCollection>} a GeoJSON GeometryCollection Feature
-	 * @example
-	 * var pt = turf.geometry("Point", [100, 0]);
-	 * var line = turf.geometry("LineString", [[101, 0], [102, 1]]);
-	 * var collection = turf.geometryCollection([pt, line]);
-	 *
-	 * // => collection
-	 */
-	function geometryCollection(geometries, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    var geom = {
-	        type: "GeometryCollection",
-	        geometries: geometries,
-	    };
-	    return feature(geom, properties, options);
-	}
-	exports.geometryCollection = geometryCollection;
-	/**
-	 * Round number to precision
-	 *
-	 * @param {number} num Number
-	 * @param {number} [precision=0] Precision
-	 * @returns {number} rounded number
-	 * @example
-	 * turf.round(120.4321)
-	 * //=120
-	 *
-	 * turf.round(120.4321, 2)
-	 * //=120.43
-	 */
-	function round(num, precision) {
-	    if (precision === void 0) { precision = 0; }
-	    if (precision && !(precision >= 0)) {
-	        throw new Error("precision must be a positive number");
-	    }
-	    var multiplier = Math.pow(10, precision || 0);
-	    return Math.round(num * multiplier) / multiplier;
-	}
-	exports.round = round;
-	/**
-	 * Convert a distance measurement (assuming a spherical Earth) from radians to a more friendly unit.
-	 * Valid units: miles, nauticalmiles, inches, yards, meters, metres, kilometers, centimeters, feet
-	 *
-	 * @name radiansToLength
-	 * @param {number} radians in radians across the sphere
-	 * @param {string} [units="kilometers"] can be degrees, radians, miles, or kilometers inches, yards, metres,
-	 * meters, kilometres, kilometers.
-	 * @returns {number} distance
-	 */
-	function radiansToLength(radians, units) {
-	    if (units === void 0) { units = "kilometers"; }
-	    var factor = exports.factors[units];
-	    if (!factor) {
-	        throw new Error(units + " units is invalid");
-	    }
-	    return radians * factor;
-	}
-	exports.radiansToLength = radiansToLength;
-	/**
-	 * Convert a distance measurement (assuming a spherical Earth) from a real-world unit into radians
-	 * Valid units: miles, nauticalmiles, inches, yards, meters, metres, kilometers, centimeters, feet
-	 *
-	 * @name lengthToRadians
-	 * @param {number} distance in real units
-	 * @param {string} [units="kilometers"] can be degrees, radians, miles, or kilometers inches, yards, metres,
-	 * meters, kilometres, kilometers.
-	 * @returns {number} radians
-	 */
-	function lengthToRadians(distance, units) {
-	    if (units === void 0) { units = "kilometers"; }
-	    var factor = exports.factors[units];
-	    if (!factor) {
-	        throw new Error(units + " units is invalid");
-	    }
-	    return distance / factor;
-	}
-	exports.lengthToRadians = lengthToRadians;
-	/**
-	 * Convert a distance measurement (assuming a spherical Earth) from a real-world unit into degrees
-	 * Valid units: miles, nauticalmiles, inches, yards, meters, metres, centimeters, kilometres, feet
-	 *
-	 * @name lengthToDegrees
-	 * @param {number} distance in real units
-	 * @param {string} [units="kilometers"] can be degrees, radians, miles, or kilometers inches, yards, metres,
-	 * meters, kilometres, kilometers.
-	 * @returns {number} degrees
-	 */
-	function lengthToDegrees(distance, units) {
-	    return radiansToDegrees(lengthToRadians(distance, units));
-	}
-	exports.lengthToDegrees = lengthToDegrees;
-	/**
-	 * Converts any bearing angle from the north line direction (positive clockwise)
-	 * and returns an angle between 0-360 degrees (positive clockwise), 0 being the north line
-	 *
-	 * @name bearingToAzimuth
-	 * @param {number} bearing angle, between -180 and +180 degrees
-	 * @returns {number} angle between 0 and 360 degrees
-	 */
-	function bearingToAzimuth(bearing) {
-	    var angle = bearing % 360;
-	    if (angle < 0) {
-	        angle += 360;
-	    }
-	    return angle;
-	}
-	exports.bearingToAzimuth = bearingToAzimuth;
-	/**
-	 * Converts an angle in radians to degrees
-	 *
-	 * @name radiansToDegrees
-	 * @param {number} radians angle in radians
-	 * @returns {number} degrees between 0 and 360 degrees
-	 */
-	function radiansToDegrees(radians) {
-	    var degrees = radians % (2 * Math.PI);
-	    return degrees * 180 / Math.PI;
-	}
-	exports.radiansToDegrees = radiansToDegrees;
-	/**
-	 * Converts an angle in degrees to radians
-	 *
-	 * @name degreesToRadians
-	 * @param {number} degrees angle between 0 and 360 degrees
-	 * @returns {number} angle in radians
-	 */
-	function degreesToRadians(degrees) {
-	    var radians = degrees % 360;
-	    return radians * Math.PI / 180;
-	}
-	exports.degreesToRadians = degreesToRadians;
-	/**
-	 * Converts a length to the requested unit.
-	 * Valid units: miles, nauticalmiles, inches, yards, meters, metres, kilometers, centimeters, feet
-	 *
-	 * @param {number} length to be converted
-	 * @param {Units} [originalUnit="kilometers"] of the length
-	 * @param {Units} [finalUnit="kilometers"] returned unit
-	 * @returns {number} the converted length
-	 */
-	function convertLength(length, originalUnit, finalUnit) {
-	    if (originalUnit === void 0) { originalUnit = "kilometers"; }
-	    if (finalUnit === void 0) { finalUnit = "kilometers"; }
-	    if (!(length >= 0)) {
-	        throw new Error("length must be a positive number");
-	    }
-	    return radiansToLength(lengthToRadians(length, originalUnit), finalUnit);
-	}
-	exports.convertLength = convertLength;
-	/**
-	 * Converts a area to the requested unit.
-	 * Valid units: kilometers, kilometres, meters, metres, centimetres, millimeters, acres, miles, yards, feet, inches
-	 * @param {number} area to be converted
-	 * @param {Units} [originalUnit="meters"] of the distance
-	 * @param {Units} [finalUnit="kilometers"] returned unit
-	 * @returns {number} the converted distance
-	 */
-	function convertArea(area, originalUnit, finalUnit) {
-	    if (originalUnit === void 0) { originalUnit = "meters"; }
-	    if (finalUnit === void 0) { finalUnit = "kilometers"; }
-	    if (!(area >= 0)) {
-	        throw new Error("area must be a positive number");
-	    }
-	    var startFactor = exports.areaFactors[originalUnit];
-	    if (!startFactor) {
-	        throw new Error("invalid original units");
-	    }
-	    var finalFactor = exports.areaFactors[finalUnit];
-	    if (!finalFactor) {
-	        throw new Error("invalid final units");
-	    }
-	    return (area / startFactor) * finalFactor;
-	}
-	exports.convertArea = convertArea;
-	/**
-	 * isNumber
-	 *
-	 * @param {*} num Number to validate
-	 * @returns {boolean} true/false
-	 * @example
-	 * turf.isNumber(123)
-	 * //=true
-	 * turf.isNumber('foo')
-	 * //=false
-	 */
-	function isNumber(num) {
-	    return !isNaN(num) && num !== null && !Array.isArray(num) && !/^\s*$/.test(num);
-	}
-	exports.isNumber = isNumber;
-	/**
-	 * isObject
-	 *
-	 * @param {*} input variable to validate
-	 * @returns {boolean} true/false
-	 * @example
-	 * turf.isObject({elevation: 10})
-	 * //=true
-	 * turf.isObject('foo')
-	 * //=false
-	 */
-	function isObject(input) {
-	    return (!!input) && (input.constructor === Object);
-	}
-	exports.isObject = isObject;
-	/**
-	 * Validate BBox
-	 *
-	 * @private
-	 * @param {Array<number>} bbox BBox to validate
-	 * @returns {void}
-	 * @throws Error if BBox is not valid
-	 * @example
-	 * validateBBox([-180, -40, 110, 50])
-	 * //=OK
-	 * validateBBox([-180, -40])
-	 * //=Error
-	 * validateBBox('Foo')
-	 * //=Error
-	 * validateBBox(5)
-	 * //=Error
-	 * validateBBox(null)
-	 * //=Error
-	 * validateBBox(undefined)
-	 * //=Error
-	 */
-	function validateBBox(bbox) {
-	    if (!bbox) {
-	        throw new Error("bbox is required");
-	    }
-	    if (!Array.isArray(bbox)) {
-	        throw new Error("bbox must be an Array");
-	    }
-	    if (bbox.length !== 4 && bbox.length !== 6) {
-	        throw new Error("bbox must be an Array of 4 or 6 numbers");
-	    }
-	    bbox.forEach(function (num) {
-	        if (!isNumber(num)) {
-	            throw new Error("bbox must only contain numbers");
+	        if (common.length !== intersections.length) {
+	          return 'paths_intersect';
 	        }
-	    });
-	}
-	exports.validateBBox = validateBBox;
-	/**
-	 * Validate Id
-	 *
-	 * @private
-	 * @param {string|number} id Id to validate
-	 * @returns {void}
-	 * @throws Error if Id is not valid
-	 * @example
-	 * validateId([-180, -40, 110, 50])
-	 * //=Error
-	 * validateId([-180, -40])
-	 * //=Error
-	 * validateId('Foo')
-	 * //=OK
-	 * validateId(5)
-	 * //=OK
-	 * validateId(null)
-	 * //=Error
-	 * validateId(undefined)
-	 * //=Error
-	 */
-	function validateId(id) {
-	    if (!id) {
-	        throw new Error("id is required");
-	    }
-	    if (["string", "number"].indexOf(typeof id) === -1) {
-	        throw new Error("id must be a number or a string");
+	      }
 	    }
-	}
-	exports.validateId = validateId;
-	// Deprecated methods
-	function radians2degrees() {
-	    throw new Error("method has been renamed to `radiansToDegrees`");
-	}
-	exports.radians2degrees = radians2degrees;
-	function degrees2radians() {
-	    throw new Error("method has been renamed to `degreesToRadians`");
-	}
-	exports.degrees2radians = degrees2radians;
-	function distanceToDegrees() {
-	    throw new Error("method has been renamed to `lengthToDegrees`");
-	}
-	exports.distanceToDegrees = distanceToDegrees;
-	function distanceToRadians() {
-	    throw new Error("method has been renamed to `lengthToRadians`");
-	}
-	exports.distanceToRadians = distanceToRadians;
-	function radiansToDistance() {
-	    throw new Error("method has been renamed to `radiansToLength`");
-	}
-	exports.radiansToDistance = radiansToDistance;
-	function bearingToAngle() {
-	    throw new Error("method has been renamed to `bearingToAzimuth`");
-	}
-	exports.bearingToAngle = bearingToAngle;
-	function convertDistance() {
-	    throw new Error("method has been renamed to `convertLength`");
-	}
-	exports.convertDistance = convertDistance;
-	});
-
-	var invariant = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
 
-	/**
-	 * Unwrap a coordinate from a Point Feature, Geometry or a single coordinate.
-	 *
-	 * @name getCoord
-	 * @param {Array<number>|Geometry<Point>|Feature<Point>} coord GeoJSON Point or an Array of numbers
-	 * @returns {Array<number>} coordinates
-	 * @example
-	 * var pt = turf.point([10, 10]);
-	 *
-	 * var coord = turf.getCoord(pt);
-	 * //= [10, 10]
-	 */
-	function getCoord(coord) {
-	    if (!coord) {
-	        throw new Error("coord is required");
-	    }
-	    if (!Array.isArray(coord)) {
-	        if (coord.type === "Feature" && coord.geometry !== null && coord.geometry.type === "Point") {
-	            return coord.geometry.coordinates;
-	        }
-	        if (coord.type === "Point") {
-	            return coord.coordinates;
-	        }
-	    }
-	    if (Array.isArray(coord) && coord.length >= 2 && !Array.isArray(coord[0]) && !Array.isArray(coord[1])) {
-	        return coord;
-	    }
-	    throw new Error("coord must be GeoJSON Point or an Array of numbers");
-	}
-	exports.getCoord = getCoord;
-	/**
-	 * Unwrap coordinates from a Feature, Geometry Object or an Array
-	 *
-	 * @name getCoords
-	 * @param {Array<any>|Geometry|Feature} coords Feature, Geometry Object or an Array
-	 * @returns {Array<any>} coordinates
-	 * @example
-	 * var poly = turf.polygon([[[119.32, -8.7], [119.55, -8.69], [119.51, -8.54], [119.32, -8.7]]]);
-	 *
-	 * var coords = turf.getCoords(poly);
-	 * //= [[[119.32, -8.7], [119.55, -8.69], [119.51, -8.54], [119.32, -8.7]]]
-	 */
-	function getCoords(coords) {
-	    if (Array.isArray(coords)) {
-	        return coords;
-	    }
-	    // Feature
-	    if (coords.type === "Feature") {
-	        if (coords.geometry !== null) {
-	            return coords.geometry.coordinates;
-	        }
-	    }
-	    else {
-	        // Geometry
-	        if (coords.coordinates) {
-	            return coords.coordinates;
-	        }
-	    }
-	    throw new Error("coords must be GeoJSON Feature, Geometry Object or an Array");
-	}
-	exports.getCoords = getCoords;
-	/**
-	 * Checks if coordinates contains a number
-	 *
-	 * @name containsNumber
-	 * @param {Array<any>} coordinates GeoJSON Coordinates
-	 * @returns {boolean} true if Array contains a number
-	 */
-	function containsNumber(coordinates) {
-	    if (coordinates.length > 1 && helpers$1.isNumber(coordinates[0]) && helpers$1.isNumber(coordinates[1])) {
-	        return true;
-	    }
-	    if (Array.isArray(coordinates[0]) && coordinates[0].length) {
-	        return containsNumber(coordinates[0]);
-	    }
-	    throw new Error("coordinates must only contain numbers");
-	}
-	exports.containsNumber = containsNumber;
-	/**
-	 * Enforce expectations about types of GeoJSON objects for Turf.
-	 *
-	 * @name geojsonType
-	 * @param {GeoJSON} value any GeoJSON object
-	 * @param {string} type expected GeoJSON type
-	 * @param {string} name name of calling function
-	 * @throws {Error} if value is not the expected type.
-	 */
-	function geojsonType(value, type, name) {
-	    if (!type || !name) {
-	        throw new Error("type and name required");
-	    }
-	    if (!value || value.type !== type) {
-	        throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + value.type);
-	    }
-	}
-	exports.geojsonType = geojsonType;
-	/**
-	 * Enforce expectations about types of {@link Feature} inputs for Turf.
-	 * Internally this uses {@link geojsonType} to judge geometry types.
-	 *
-	 * @name featureOf
-	 * @param {Feature} feature a feature with an expected geometry type
-	 * @param {string} type expected GeoJSON type
-	 * @param {string} name name of calling function
-	 * @throws {Error} error if value is not the expected type.
-	 */
-	function featureOf(feature, type, name) {
-	    if (!feature) {
-	        throw new Error("No feature passed");
-	    }
-	    if (!name) {
-	        throw new Error(".featureOf() requires a name");
-	    }
-	    if (!feature || feature.type !== "Feature" || !feature.geometry) {
-	        throw new Error("Invalid input to " + name + ", Feature with geometry required");
-	    }
-	    if (!feature.geometry || feature.geometry.type !== type) {
-	        throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + feature.geometry.type);
-	    }
-	}
-	exports.featureOf = featureOf;
-	/**
-	 * Enforce expectations about types of {@link FeatureCollection} inputs for Turf.
-	 * Internally this uses {@link geojsonType} to judge geometry types.
-	 *
-	 * @name collectionOf
-	 * @param {FeatureCollection} featureCollection a FeatureCollection for which features will be judged
-	 * @param {string} type expected GeoJSON type
-	 * @param {string} name name of calling function
-	 * @throws {Error} if value is not the expected type.
-	 */
-	function collectionOf(featureCollection, type, name) {
-	    if (!featureCollection) {
-	        throw new Error("No featureCollection passed");
-	    }
-	    if (!name) {
-	        throw new Error(".collectionOf() requires a name");
-	    }
-	    if (!featureCollection || featureCollection.type !== "FeatureCollection") {
-	        throw new Error("Invalid input to " + name + ", FeatureCollection required");
-	    }
-	    for (var _i = 0, _a = featureCollection.features; _i < _a.length; _i++) {
-	        var feature = _a[_i];
-	        if (!feature || feature.type !== "Feature" || !feature.geometry) {
-	            throw new Error("Invalid input to " + name + ", Feature with geometry required");
-	        }
-	        if (!feature.geometry || feature.geometry.type !== type) {
-	            throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + feature.geometry.type);
-	        }
-	    }
-	}
-	exports.collectionOf = collectionOf;
-	/**
-	 * Get Geometry from Feature or Geometry Object
-	 *
-	 * @param {Feature|Geometry} geojson GeoJSON Feature or Geometry Object
-	 * @returns {Geometry|null} GeoJSON Geometry Object
-	 * @throws {Error} if geojson is not a Feature or Geometry Object
-	 * @example
-	 * var point = {
-	 *   "type": "Feature",
-	 *   "properties": {},
-	 *   "geometry": {
-	 *     "type": "Point",
-	 *     "coordinates": [110, 40]
-	 *   }
-	 * }
-	 * var geom = turf.getGeom(point)
-	 * //={"type": "Point", "coordinates": [110, 40]}
-	 */
-	function getGeom(geojson) {
-	    if (geojson.type === "Feature") {
-	        return geojson.geometry;
-	    }
-	    return geojson;
-	}
-	exports.getGeom = getGeom;
-	/**
-	 * Get GeoJSON object's type, Geometry type is prioritize.
-	 *
-	 * @param {GeoJSON} geojson GeoJSON object
-	 * @param {string} [name="geojson"] name of the variable to display in error message
-	 * @returns {string} GeoJSON type
-	 * @example
-	 * var point = {
-	 *   "type": "Feature",
-	 *   "properties": {},
-	 *   "geometry": {
-	 *     "type": "Point",
-	 *     "coordinates": [110, 40]
-	 *   }
-	 * }
-	 * var geom = turf.getType(point)
-	 * //="Point"
-	 */
-	function getType(geojson, name) {
-	    if (geojson.type === "FeatureCollection") {
-	        return "FeatureCollection";
-	    }
-	    if (geojson.type === "GeometryCollection") {
-	        return "GeometryCollection";
+	    var nodeIds = joined[0].nodes.map(function (n) {
+	      return n.id;
+	    }).slice(1, -1);
+	    var relation;
+	    var tags = {};
+	    var conflicting = false;
+	    joined[0].forEach(function (way) {
+	      var parents = graph.parentRelations(way);
+	      parents.forEach(function (parent) {
+	        if ((parent.isRestriction() || parent.isConnectivity()) && parent.members.some(function (m) {
+	          return nodeIds.indexOf(m.id) >= 0;
+	        })) {
+	          relation = parent;
+	        }
+	      });
+
+	      for (var k in way.tags) {
+	        if (!(k in tags)) {
+	          tags[k] = way.tags[k];
+	        } else if (tags[k] && osmIsInterestingTag(k) && tags[k] !== way.tags[k]) {
+	          conflicting = true;
+	        }
+	      }
+	    });
+
+	    if (relation) {
+	      return relation.isRestriction() ? 'restriction' : 'connectivity';
 	    }
-	    if (geojson.type === "Feature" && geojson.geometry !== null) {
-	        return geojson.geometry.type;
+
+	    if (conflicting) {
+	      return 'conflicting_tags';
 	    }
-	    return geojson.type;
+	  };
+
+	  return action;
 	}
-	exports.getType = getType;
-	});
 
-	var lineclip_1 = lineclip;
-	var _default = lineclip;
+	function actionMerge(ids) {
+	  function groupEntitiesByGeometry(graph) {
+	    var entities = ids.map(function (id) {
+	      return graph.entity(id);
+	    });
+	    return Object.assign({
+	      point: [],
+	      area: [],
+	      line: [],
+	      relation: []
+	    }, utilArrayGroupBy(entities, function (entity) {
+	      return entity.geometry(graph);
+	    }));
+	  }
+
+	  var action = function action(graph) {
+	    var geometries = groupEntitiesByGeometry(graph);
+	    var target = geometries.area[0] || geometries.line[0];
+	    var points = geometries.point;
+	    points.forEach(function (point) {
+	      target = target.mergeTags(point.tags);
+	      graph = graph.replace(target);
+	      graph.parentRelations(point).forEach(function (parent) {
+	        graph = graph.replace(parent.replaceMember(point, target));
+	      });
+	      var nodes = utilArrayUniq(graph.childNodes(target));
+	      var removeNode = point;
 
-	lineclip.polyline = lineclip;
-	lineclip.polygon = polygonclip;
+	      for (var i = 0; i < nodes.length; i++) {
+	        var node = nodes[i];
 
+	        if (graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags()) {
+	          continue;
+	        } // Found an uninteresting child node on the target way.
+	        // Move orig point into its place to preserve point's history. #3683
 
-	// Cohen-Sutherland line clippign algorithm, adapted to efficiently
-	// handle polylines rather than just segments
 
-	function lineclip(points, bbox, result) {
+	        graph = graph.replace(point.update({
+	          tags: {},
+	          loc: node.loc
+	        }));
+	        target = target.replaceNode(node.id, point.id);
+	        graph = graph.replace(target);
+	        removeNode = node;
+	        break;
+	      }
 
-	    var len = points.length,
-	        codeA = bitCode(points[0], bbox),
-	        part = [],
-	        i, a, b, codeB, lastCode;
+	      graph = graph.remove(removeNode);
+	    });
 
-	    if (!result) { result = []; }
+	    if (target.tags.area === 'yes') {
+	      var tags = Object.assign({}, target.tags); // shallow copy
 
-	    for (i = 1; i < len; i++) {
-	        a = points[i - 1];
-	        b = points[i];
-	        codeB = lastCode = bitCode(b, bbox);
+	      delete tags.area;
 
-	        while (true) {
+	      if (osmTagSuggestingArea(tags)) {
+	        // remove the `area` tag if area geometry is now implied - #3851
+	        target = target.update({
+	          tags: tags
+	        });
+	        graph = graph.replace(target);
+	      }
+	    }
 
-	            if (!(codeA | codeB)) { // accept
-	                part.push(a);
+	    return graph;
+	  };
 
-	                if (codeB !== lastCode) { // segment went outside
-	                    part.push(b);
+	  action.disabled = function (graph) {
+	    var geometries = groupEntitiesByGeometry(graph);
 
-	                    if (i < len - 1) { // start a new line
-	                        result.push(part);
-	                        part = [];
-	                    }
-	                } else if (i === len - 1) {
-	                    part.push(b);
-	                }
-	                break;
+	    if (geometries.point.length === 0 || geometries.area.length + geometries.line.length !== 1 || geometries.relation.length !== 0) {
+	      return 'not_eligible';
+	    }
+	  };
 
-	            } else if (codeA & codeB) { // trivial reject
-	                break;
+	  return action;
+	}
 
-	            } else if (codeA) { // a outside, intersect with clip edge
-	                a = intersect(a, b, codeA, bbox);
-	                codeA = bitCode(a, bbox);
+	//
+	// 1. move all the nodes to a common location
+	// 2. `actionConnect` them
 
-	            } else { // b outside
-	                b = intersect(a, b, codeB, bbox);
-	                codeB = bitCode(b, bbox);
-	            }
-	        }
+	function actionMergeNodes(nodeIDs, loc) {
+	  // If there is a single "interesting" node, use that as the location.
+	  // Otherwise return the average location of all the nodes.
+	  function chooseLoc(graph) {
+	    if (!nodeIDs.length) return null;
+	    var sum = [0, 0];
+	    var interestingCount = 0;
+	    var interestingLoc;
+
+	    for (var i = 0; i < nodeIDs.length; i++) {
+	      var node = graph.entity(nodeIDs[i]);
+
+	      if (node.hasInterestingTags()) {
+	        interestingLoc = ++interestingCount === 1 ? node.loc : null;
+	      }
 
-	        codeA = lastCode;
+	      sum = geoVecAdd(sum, node.loc);
 	    }
 
-	    if (part.length) { result.push(part); }
+	    return interestingLoc || geoVecScale(sum, 1 / nodeIDs.length);
+	  }
 
-	    return result;
+	  var action = function action(graph) {
+	    if (nodeIDs.length < 2) return graph;
+	    var toLoc = loc;
+
+	    if (!toLoc) {
+	      toLoc = chooseLoc(graph);
+	    }
+
+	    for (var i = 0; i < nodeIDs.length; i++) {
+	      var node = graph.entity(nodeIDs[i]);
+
+	      if (node.loc !== toLoc) {
+	        graph = graph.replace(node.move(toLoc));
+	      }
+	    }
+
+	    return actionConnect(nodeIDs)(graph);
+	  };
+
+	  action.disabled = function (graph) {
+	    if (nodeIDs.length < 2) return 'not_eligible';
+
+	    for (var i = 0; i < nodeIDs.length; i++) {
+	      var entity = graph.entity(nodeIDs[i]);
+	      if (entity.type !== 'node') return 'not_eligible';
+	    }
+
+	    return actionConnect(nodeIDs).disabled(graph);
+	  };
+
+	  return action;
+	}
+
+	function osmChangeset() {
+	  if (!(this instanceof osmChangeset)) {
+	    return new osmChangeset().initialize(arguments);
+	  } else if (arguments.length) {
+	    this.initialize(arguments);
+	  }
 	}
+	osmEntity.changeset = osmChangeset;
+	osmChangeset.prototype = Object.create(osmEntity.prototype);
+	Object.assign(osmChangeset.prototype, {
+	  type: 'changeset',
+	  extent: function extent() {
+	    return new geoExtent();
+	  },
+	  geometry: function geometry() {
+	    return 'changeset';
+	  },
+	  asJXON: function asJXON() {
+	    return {
+	      osm: {
+	        changeset: {
+	          tag: Object.keys(this.tags).map(function (k) {
+	            return {
+	              '@k': k,
+	              '@v': this.tags[k]
+	            };
+	          }, this),
+	          '@version': 0.6,
+	          '@generator': 'iD'
+	        }
+	      }
+	    };
+	  },
+	  // Generate [osmChange](http://wiki.openstreetmap.org/wiki/OsmChange)
+	  // XML. Returns a string.
+	  osmChangeJXON: function osmChangeJXON(changes) {
+	    var changeset_id = this.id;
+
+	    function nest(x, order) {
+	      var groups = {};
+
+	      for (var i = 0; i < x.length; i++) {
+	        var tagName = Object.keys(x[i])[0];
+	        if (!groups[tagName]) groups[tagName] = [];
+	        groups[tagName].push(x[i][tagName]);
+	      }
 
-	// Sutherland-Hodgeman polygon clipping algorithm
+	      var ordered = {};
+	      order.forEach(function (o) {
+	        if (groups[o]) ordered[o] = groups[o];
+	      });
+	      return ordered;
+	    } // sort relations in a changeset by dependencies
 
-	function polygonclip(points, bbox) {
 
-	    var result, edge, prev, prevInside, i, p, inside;
+	    function sort(changes) {
+	      // find a referenced relation in the current changeset
+	      function resolve(item) {
+	        return relations.find(function (relation) {
+	          return item.keyAttributes.type === 'relation' && item.keyAttributes.ref === relation['@id'];
+	        });
+	      } // a new item is an item that has not been already processed
 
-	    // clip against each side of the clip rectangle
-	    for (edge = 1; edge <= 8; edge *= 2) {
-	        result = [];
-	        prev = points[points.length - 1];
-	        prevInside = !(bitCode(prev, bbox) & edge);
 
-	        for (i = 0; i < points.length; i++) {
-	            p = points[i];
-	            inside = !(bitCode(p, bbox) & edge);
+	      function isNew(item) {
+	        return !sorted[item['@id']] && !processing.find(function (proc) {
+	          return proc['@id'] === item['@id'];
+	        });
+	      }
 
-	            // if segment goes through the clip window, add an intersection
-	            if (inside !== prevInside) { result.push(intersect(prev, p, edge, bbox)); }
+	      var processing = [];
+	      var sorted = {};
+	      var relations = changes.relation;
+	      if (!relations) return changes;
 
-	            if (inside) { result.push(p); } // add a point if it's inside
+	      for (var i = 0; i < relations.length; i++) {
+	        var relation = relations[i]; // skip relation if already sorted
 
-	            prev = p;
-	            prevInside = inside;
+	        if (!sorted[relation['@id']]) {
+	          processing.push(relation);
 	        }
 
-	        points = result;
+	        while (processing.length > 0) {
+	          var next = processing[0],
+	              deps = next.member.map(resolve).filter(Boolean).filter(isNew);
 
-	        if (!points.length) { break; }
+	          if (deps.length === 0) {
+	            sorted[next['@id']] = next;
+	            processing.shift();
+	          } else {
+	            processing = deps.concat(processing);
+	          }
+	        }
+	      }
+
+	      changes.relation = Object.values(sorted);
+	      return changes;
 	    }
 
-	    return result;
-	}
+	    function rep(entity) {
+	      return entity.asJXON(changeset_id);
+	    }
 
-	// intersect a segment against one of the 4 lines that make up the bbox
+	    return {
+	      osmChange: {
+	        '@version': 0.6,
+	        '@generator': 'iD',
+	        'create': sort(nest(changes.created.map(rep), ['node', 'way', 'relation'])),
+	        'modify': nest(changes.modified.map(rep), ['node', 'way', 'relation']),
+	        'delete': Object.assign(nest(changes.deleted.map(rep), ['relation', 'way', 'node']), {
+	          '@if-unused': true
+	        })
+	      }
+	    };
+	  },
+	  asGeoJSON: function asGeoJSON() {
+	    return {};
+	  }
+	});
 
-	function intersect(a, b, edge, bbox) {
-	    return edge & 8 ? [a[0] + (b[0] - a[0]) * (bbox[3] - a[1]) / (b[1] - a[1]), bbox[3]] : // top
-	           edge & 4 ? [a[0] + (b[0] - a[0]) * (bbox[1] - a[1]) / (b[1] - a[1]), bbox[1]] : // bottom
-	           edge & 2 ? [bbox[2], a[1] + (b[1] - a[1]) * (bbox[2] - a[0]) / (b[0] - a[0])] : // right
-	           edge & 1 ? [bbox[0], a[1] + (b[1] - a[1]) * (bbox[0] - a[0]) / (b[0] - a[0])] : // left
-	           null;
+	function osmNote() {
+	  if (!(this instanceof osmNote)) {
+	    return new osmNote().initialize(arguments);
+	  } else if (arguments.length) {
+	    this.initialize(arguments);
+	  }
 	}
 
-	// bit code reflects the point position relative to the bbox:
-
-	//         left  mid  right
-	//    top  1001  1000  1010
-	//    mid  0001  0000  0010
-	// bottom  0101  0100  0110
+	osmNote.id = function () {
+	  return osmNote.id.next--;
+	};
 
-	function bitCode(p, bbox) {
-	    var code = 0;
+	osmNote.id.next = -1;
+	Object.assign(osmNote.prototype, {
+	  type: 'note',
+	  initialize: function initialize(sources) {
+	    for (var i = 0; i < sources.length; ++i) {
+	      var source = sources[i];
+
+	      for (var prop in source) {
+	        if (Object.prototype.hasOwnProperty.call(source, prop)) {
+	          if (source[prop] === undefined) {
+	            delete this[prop];
+	          } else {
+	            this[prop] = source[prop];
+	          }
+	        }
+	      }
+	    }
 
-	    if (p[0] < bbox[0]) { code |= 1; } // left
-	    else if (p[0] > bbox[2]) { code |= 2; } // right
+	    if (!this.id) {
+	      this.id = osmNote.id().toString();
+	    }
 
-	    if (p[1] < bbox[1]) { code |= 4; } // bottom
-	    else if (p[1] > bbox[3]) { code |= 8; } // top
+	    return this;
+	  },
+	  extent: function extent() {
+	    return new geoExtent(this.loc);
+	  },
+	  update: function update(attrs) {
+	    return osmNote(this, attrs); // {v: 1 + (this.v || 0)}
+	  },
+	  isNew: function isNew() {
+	    return this.id < 0;
+	  },
+	  move: function move(loc) {
+	    return this.update({
+	      loc: loc
+	    });
+	  }
+	});
 
-	    return code;
+	function osmRelation() {
+	  if (!(this instanceof osmRelation)) {
+	    return new osmRelation().initialize(arguments);
+	  } else if (arguments.length) {
+	    this.initialize(arguments);
+	  }
 	}
-	lineclip_1.default = _default;
+	osmEntity.relation = osmRelation;
+	osmRelation.prototype = Object.create(osmEntity.prototype);
 
-	var bboxClip_1 = createCommonjsModule(function (module, exports) {
-	var __importStar = (commonjsGlobal && commonjsGlobal.__importStar) || function (mod) {
-	    if (mod && mod.__esModule) { return mod; }
-	    var result = {};
-	    if (mod != null) { for (var k in mod) { if (Object.hasOwnProperty.call(mod, k)) { result[k] = mod[k]; } } }
-	    result["default"] = mod;
-	    return result;
+	osmRelation.creationOrder = function (a, b) {
+	  var aId = parseInt(osmEntity.id.toOSM(a.id), 10);
+	  var bId = parseInt(osmEntity.id.toOSM(b.id), 10);
+	  if (aId < 0 || bId < 0) return aId - bId;
+	  return bId - aId;
 	};
-	Object.defineProperty(exports, "__esModule", { value: true });
 
+	Object.assign(osmRelation.prototype, {
+	  type: 'relation',
+	  members: [],
+	  copy: function copy(resolver, copies) {
+	    if (copies[this.id]) return copies[this.id];
+	    var copy = osmEntity.prototype.copy.call(this, resolver, copies);
+	    var members = this.members.map(function (member) {
+	      return Object.assign({}, member, {
+	        id: resolver.entity(member.id).copy(resolver, copies).id
+	      });
+	    });
+	    copy = copy.update({
+	      members: members
+	    });
+	    copies[this.id] = copy;
+	    return copy;
+	  },
+	  extent: function extent(resolver, memo) {
+	    return resolver["transient"](this, 'extent', function () {
+	      if (memo && memo[this.id]) return geoExtent();
+	      memo = memo || {};
+	      memo[this.id] = true;
+	      var extent = geoExtent();
 
-	var lineclip = __importStar(lineclip_1);
-	/**
-	 * Takes a {@link Feature} and a bbox and clips the feature to the bbox using
-	 * [lineclip](https://github.com/mapbox/lineclip).
-	 * May result in degenerate edges when clipping Polygons.
-	 *
-	 * @name bboxClip
-	 * @param {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} feature feature to clip to the bbox
-	 * @param {BBox} bbox extent in [minX, minY, maxX, maxY] order
-	 * @returns {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} clipped Feature
-	 * @example
-	 * var bbox = [0, 0, 10, 10];
-	 * var poly = turf.polygon([[[2, 2], [8, 4], [12, 8], [3, 7], [2, 2]]]);
-	 *
-	 * var clipped = turf.bboxClip(poly, bbox);
-	 *
-	 * //addToMap
-	 * var addToMap = [bbox, poly, clipped]
-	 */
-	function bboxClip(feature, bbox) {
-	    var geom = invariant.getGeom(feature);
-	    var type = geom.type;
-	    var properties = feature.type === "Feature" ? feature.properties : {};
-	    var coords = geom.coordinates;
-	    switch (type) {
-	        case "LineString":
-	        case "MultiLineString":
-	            var lines_1 = [];
-	            if (type === "LineString") {
-	                coords = [coords];
-	            }
-	            coords.forEach(function (line) {
-	                lineclip.polyline(line, bbox, lines_1);
-	            });
-	            if (lines_1.length === 1) {
-	                return helpers$1.lineString(lines_1[0], properties);
-	            }
-	            return helpers$1.multiLineString(lines_1, properties);
-	        case "Polygon":
-	            return helpers$1.polygon(clipPolygon(coords, bbox), properties);
-	        case "MultiPolygon":
-	            return helpers$1.multiPolygon(coords.map(function (poly) {
-	                return clipPolygon(poly, bbox);
-	            }), properties);
-	        default:
-	            throw new Error("geometry " + type + " not supported");
+	      for (var i = 0; i < this.members.length; i++) {
+	        var member = resolver.hasEntity(this.members[i].id);
+
+	        if (member) {
+	          extent._extend(member.extent(resolver, memo));
+	        }
+	      }
+
+	      return extent;
+	    });
+	  },
+	  geometry: function geometry(graph) {
+	    return graph["transient"](this, 'geometry', function () {
+	      return this.isMultipolygon() ? 'area' : 'relation';
+	    });
+	  },
+	  isDegenerate: function isDegenerate() {
+	    return this.members.length === 0;
+	  },
+	  // Return an array of members, each extended with an 'index' property whose value
+	  // is the member index.
+	  indexedMembers: function indexedMembers() {
+	    var result = new Array(this.members.length);
+
+	    for (var i = 0; i < this.members.length; i++) {
+	      result[i] = Object.assign({}, this.members[i], {
+	        index: i
+	      });
 	    }
-	}
-	exports.default = bboxClip;
-	function clipPolygon(rings, bbox) {
-	    var outRings = [];
-	    for (var _i = 0, rings_1 = rings; _i < rings_1.length; _i++) {
-	        var ring = rings_1[_i];
-	        var clipped = lineclip.polygon(ring, bbox);
-	        if (clipped.length > 0) {
-	            if (clipped[0][0] !== clipped[clipped.length - 1][0] || clipped[0][1] !== clipped[clipped.length - 1][1]) {
-	                clipped.push(clipped[0]);
+
+	    return result;
+	  },
+	  // Return the first member with the given role. A copy of the member object
+	  // is returned, extended with an 'index' property whose value is the member index.
+	  memberByRole: function memberByRole(role) {
+	    for (var i = 0; i < this.members.length; i++) {
+	      if (this.members[i].role === role) {
+	        return Object.assign({}, this.members[i], {
+	          index: i
+	        });
+	      }
+	    }
+	  },
+	  // Same as memberByRole, but returns all members with the given role
+	  membersByRole: function membersByRole(role) {
+	    var result = [];
+
+	    for (var i = 0; i < this.members.length; i++) {
+	      if (this.members[i].role === role) {
+	        result.push(Object.assign({}, this.members[i], {
+	          index: i
+	        }));
+	      }
+	    }
+
+	    return result;
+	  },
+	  // Return the first member with the given id. A copy of the member object
+	  // is returned, extended with an 'index' property whose value is the member index.
+	  memberById: function memberById(id) {
+	    for (var i = 0; i < this.members.length; i++) {
+	      if (this.members[i].id === id) {
+	        return Object.assign({}, this.members[i], {
+	          index: i
+	        });
+	      }
+	    }
+	  },
+	  // Return the first member with the given id and role. A copy of the member object
+	  // is returned, extended with an 'index' property whose value is the member index.
+	  memberByIdAndRole: function memberByIdAndRole(id, role) {
+	    for (var i = 0; i < this.members.length; i++) {
+	      if (this.members[i].id === id && this.members[i].role === role) {
+	        return Object.assign({}, this.members[i], {
+	          index: i
+	        });
+	      }
+	    }
+	  },
+	  addMember: function addMember(member, index) {
+	    var members = this.members.slice();
+	    members.splice(index === undefined ? members.length : index, 0, member);
+	    return this.update({
+	      members: members
+	    });
+	  },
+	  updateMember: function updateMember(member, index) {
+	    var members = this.members.slice();
+	    members.splice(index, 1, Object.assign({}, members[index], member));
+	    return this.update({
+	      members: members
+	    });
+	  },
+	  removeMember: function removeMember(index) {
+	    var members = this.members.slice();
+	    members.splice(index, 1);
+	    return this.update({
+	      members: members
+	    });
+	  },
+	  removeMembersWithID: function removeMembersWithID(id) {
+	    var members = this.members.filter(function (m) {
+	      return m.id !== id;
+	    });
+	    return this.update({
+	      members: members
+	    });
+	  },
+	  moveMember: function moveMember(fromIndex, toIndex) {
+	    var members = this.members.slice();
+	    members.splice(toIndex, 0, members.splice(fromIndex, 1)[0]);
+	    return this.update({
+	      members: members
+	    });
+	  },
+	  // Wherever a member appears with id `needle.id`, replace it with a member
+	  // with id `replacement.id`, type `replacement.type`, and the original role,
+	  // By default, adding a duplicate member (by id and role) is prevented.
+	  // Return an updated relation.
+	  replaceMember: function replaceMember(needle, replacement, keepDuplicates) {
+	    if (!this.memberById(needle.id)) return this;
+	    var members = [];
+
+	    for (var i = 0; i < this.members.length; i++) {
+	      var member = this.members[i];
+
+	      if (member.id !== needle.id) {
+	        members.push(member);
+	      } else if (keepDuplicates || !this.memberByIdAndRole(replacement.id, member.role)) {
+	        members.push({
+	          id: replacement.id,
+	          type: replacement.type,
+	          role: member.role
+	        });
+	      }
+	    }
+
+	    return this.update({
+	      members: members
+	    });
+	  },
+	  asJXON: function asJXON(changeset_id) {
+	    var r = {
+	      relation: {
+	        '@id': this.osmId(),
+	        '@version': this.version || 0,
+	        member: this.members.map(function (member) {
+	          return {
+	            keyAttributes: {
+	              type: member.type,
+	              role: member.role,
+	              ref: osmEntity.id.toOSM(member.id)
 	            }
-	            if (clipped.length >= 4) {
-	                outRings.push(clipped);
+	          };
+	        }, this),
+	        tag: Object.keys(this.tags).map(function (k) {
+	          return {
+	            keyAttributes: {
+	              k: k,
+	              v: this.tags[k]
 	            }
-	        }
+	          };
+	        }, this)
+	      }
+	    };
+
+	    if (changeset_id) {
+	      r.relation['@changeset'] = changeset_id;
 	    }
-	    return outRings;
-	}
-	});
 
-	var turf_bboxClip = /*@__PURE__*/getDefaultExportFromCjs(bboxClip_1);
+	    return r;
+	  },
+	  asGeoJSON: function asGeoJSON(resolver) {
+	    return resolver["transient"](this, 'GeoJSON', function () {
+	      if (this.isMultipolygon()) {
+	        return {
+	          type: 'MultiPolygon',
+	          coordinates: this.multipolygon(resolver)
+	        };
+	      } else {
+	        return {
+	          type: 'FeatureCollection',
+	          properties: this.tags,
+	          features: this.members.map(function (member) {
+	            return Object.assign({
+	              role: member.role
+	            }, resolver.entity(member.id).asGeoJSON(resolver));
+	          })
+	        };
+	      }
+	    });
+	  },
+	  area: function area(resolver) {
+	    return resolver["transient"](this, 'area', function () {
+	      return d3_geoArea(this.asGeoJSON(resolver));
+	    });
+	  },
+	  isMultipolygon: function isMultipolygon() {
+	    return this.tags.type === 'multipolygon';
+	  },
+	  isComplete: function isComplete(resolver) {
+	    for (var i = 0; i < this.members.length; i++) {
+	      if (!resolver.hasEntity(this.members[i].id)) {
+	        return false;
+	      }
+	    }
 
-	var fastJsonStableStringify = function (data, opts) {
-	    if (!opts) { opts = {}; }
-	    if (typeof opts === 'function') { opts = { cmp: opts }; }
-	    var cycles = (typeof opts.cycles === 'boolean') ? opts.cycles : false;
+	    return true;
+	  },
+	  hasFromViaTo: function hasFromViaTo() {
+	    return this.members.some(function (m) {
+	      return m.role === 'from';
+	    }) && this.members.some(function (m) {
+	      return m.role === 'via';
+	    }) && this.members.some(function (m) {
+	      return m.role === 'to';
+	    });
+	  },
+	  isRestriction: function isRestriction() {
+	    return !!(this.tags.type && this.tags.type.match(/^restriction:?/));
+	  },
+	  isValidRestriction: function isValidRestriction() {
+	    if (!this.isRestriction()) return false;
+	    var froms = this.members.filter(function (m) {
+	      return m.role === 'from';
+	    });
+	    var vias = this.members.filter(function (m) {
+	      return m.role === 'via';
+	    });
+	    var tos = this.members.filter(function (m) {
+	      return m.role === 'to';
+	    });
+	    if (froms.length !== 1 && this.tags.restriction !== 'no_entry') return false;
+	    if (froms.some(function (m) {
+	      return m.type !== 'way';
+	    })) return false;
+	    if (tos.length !== 1 && this.tags.restriction !== 'no_exit') return false;
+	    if (tos.some(function (m) {
+	      return m.type !== 'way';
+	    })) return false;
+	    if (vias.length === 0) return false;
+	    if (vias.length > 1 && vias.some(function (m) {
+	      return m.type !== 'way';
+	    })) return false;
+	    return true;
+	  },
+	  isConnectivity: function isConnectivity() {
+	    return !!(this.tags.type && this.tags.type.match(/^connectivity:?/));
+	  },
+	  // Returns an array [A0, ... An], each Ai being an array of node arrays [Nds0, ... Ndsm],
+	  // where Nds0 is an outer ring and subsequent Ndsi's (if any i > 0) being inner rings.
+	  //
+	  // This corresponds to the structure needed for rendering a multipolygon path using a
+	  // `evenodd` fill rule, as well as the structure of a GeoJSON MultiPolygon geometry.
+	  //
+	  // In the case of invalid geometries, this function will still return a result which
+	  // includes the nodes of all way members, but some Nds may be unclosed and some inner
+	  // rings not matched with the intended outer ring.
+	  //
+	  multipolygon: function multipolygon(resolver) {
+	    var outers = this.members.filter(function (m) {
+	      return 'outer' === (m.role || 'outer');
+	    });
+	    var inners = this.members.filter(function (m) {
+	      return 'inner' === m.role;
+	    });
+	    outers = osmJoinWays(outers, resolver);
+	    inners = osmJoinWays(inners, resolver);
 
-	    var cmp = opts.cmp && (function (f) {
-	        return function (node) {
-	            return function (a, b) {
-	                var aobj = { key: a, value: node[a] };
-	                var bobj = { key: b, value: node[b] };
-	                return f(aobj, bobj);
-	            };
-	        };
-	    })(opts.cmp);
+	    var sequenceToLineString = function sequenceToLineString(sequence) {
+	      if (sequence.nodes.length > 2 && sequence.nodes[0] !== sequence.nodes[sequence.nodes.length - 1]) {
+	        // close unclosed parts to ensure correct area rendering - #2945
+	        sequence.nodes.push(sequence.nodes[0]);
+	      }
 
-	    var seen = [];
-	    return (function stringify (node) {
-	        if (node && node.toJSON && typeof node.toJSON === 'function') {
-	            node = node.toJSON();
-	        }
+	      return sequence.nodes.map(function (node) {
+	        return node.loc;
+	      });
+	    };
 
-	        if (node === undefined) { return; }
-	        if (typeof node == 'number') { return isFinite(node) ? '' + node : 'null'; }
-	        if (typeof node !== 'object') { return JSON.stringify(node); }
+	    outers = outers.map(sequenceToLineString);
+	    inners = inners.map(sequenceToLineString);
+	    var result = outers.map(function (o) {
+	      // Heuristic for detecting counterclockwise winding order. Assumes
+	      // that OpenStreetMap polygons are not hemisphere-spanning.
+	      return [d3_geoArea({
+	        type: 'Polygon',
+	        coordinates: [o]
+	      }) > 2 * Math.PI ? o.reverse() : o];
+	    });
 
-	        var i, out;
-	        if (Array.isArray(node)) {
-	            out = '[';
-	            for (i = 0; i < node.length; i++) {
-	                if (i) { out += ','; }
-	                out += stringify(node[i]) || 'null';
-	            }
-	            return out + ']';
-	        }
+	    function findOuter(inner) {
+	      var o, outer;
 
-	        if (node === null) { return 'null'; }
+	      for (o = 0; o < outers.length; o++) {
+	        outer = outers[o];
 
-	        if (seen.indexOf(node) !== -1) {
-	            if (cycles) { return JSON.stringify('__cycle__'); }
-	            throw new TypeError('Converting circular structure to JSON');
+	        if (geoPolygonContainsPolygon(outer, inner)) {
+	          return o;
 	        }
+	      }
 
-	        var seenIndex = seen.push(node) - 1;
-	        var keys = Object.keys(node).sort(cmp && cmp(node));
-	        out = '';
-	        for (i = 0; i < keys.length; i++) {
-	            var key = keys[i];
-	            var value = stringify(node[key]);
+	      for (o = 0; o < outers.length; o++) {
+	        outer = outers[o];
 
-	            if (!value) { continue; }
-	            if (out) { out += ','; }
-	            out += JSON.stringify(key) + ':' + value;
+	        if (geoPolygonIntersectsPolygon(outer, inner, false)) {
+	          return o;
 	        }
-	        seen.splice(seenIndex, 1);
-	        return '{' + out + '}';
-	    })(data);
-	};
-
-	function DEFAULT_COMPARE (a, b) { return a > b ? 1 : a < b ? -1 : 0; }
+	      }
+	    }
 
-	var SplayTree = function SplayTree(compare, noDuplicates) {
-	  if ( compare === void 0 ) compare = DEFAULT_COMPARE;
-	  if ( noDuplicates === void 0 ) noDuplicates = false;
+	    for (var i = 0; i < inners.length; i++) {
+	      var inner = inners[i];
 
-	  this._compare = compare;
-	  this._root = null;
-	  this._size = 0;
-	  this._noDuplicates = !!noDuplicates;
-	};
+	      if (d3_geoArea({
+	        type: 'Polygon',
+	        coordinates: [inner]
+	      }) < 2 * Math.PI) {
+	        inner = inner.reverse();
+	      }
 
-	var prototypeAccessors = { size: { configurable: true } };
+	      var o = findOuter(inners[i]);
 
+	      if (o !== undefined) {
+	        result[o].push(inners[i]);
+	      } else {
+	        result.push([inners[i]]); // Invalid geometry
+	      }
+	    }
 
-	SplayTree.prototype.rotateLeft = function rotateLeft (x) {
-	  var y = x.right;
-	  if (y) {
-	    x.right = y.left;
-	    if (y.left) { y.left.parent = x; }
-	    y.parent = x.parent;
+	    return result;
 	  }
+	});
 
-	  if (!x.parent)              { this._root = y; }
-	  else if (x === x.parent.left) { x.parent.left = y; }
-	  else                        { x.parent.right = y; }
-	  if (y) { y.left = x; }
-	  x.parent = y;
-	};
+	var QAItem = /*#__PURE__*/function () {
+	  function QAItem(loc, service, itemType, id, props) {
+	    _classCallCheck$1(this, QAItem);
 
+	    // Store required properties
+	    this.loc = loc;
+	    this.service = service.title;
+	    this.itemType = itemType; // All issues must have an ID for selection, use generic if none specified
 
-	SplayTree.prototype.rotateRight = function rotateRight (x) {
-	  var y = x.left;
-	  if (y) {
-	    x.left = y.right;
-	    if (y.right) { y.right.parent = x; }
-	    y.parent = x.parent;
+	    this.id = id ? id : "".concat(QAItem.id());
+	    this.update(props); // Some QA services have marker icons to differentiate issues
+
+	    if (service && typeof service.getIcon === 'function') {
+	      this.icon = service.getIcon(itemType);
+	    }
 	  }
 
-	  if (!x.parent)             { this._root = y; }
-	  else if(x === x.parent.left) { x.parent.left = y; }
-	  else                       { x.parent.right = y; }
-	  if (y) { y.right = x; }
-	  x.parent = y;
-	};
+	  _createClass$1(QAItem, [{
+	    key: "update",
+	    value: function update(props) {
+	      var _this = this;
+
+	      // You can't override this initial information
+	      var loc = this.loc,
+	          service = this.service,
+	          itemType = this.itemType,
+	          id = this.id;
+	      Object.keys(props).forEach(function (prop) {
+	        return _this[prop] = props[prop];
+	      });
+	      this.loc = loc;
+	      this.service = service;
+	      this.itemType = itemType;
+	      this.id = id;
+	      return this;
+	    } // Generic handling for newly created QAItems
 
+	  }], [{
+	    key: "id",
+	    value: function id() {
+	      return this.nextId--;
+	    }
+	  }]);
 
-	SplayTree.prototype._splay = function _splay (x) {
-	  while (x.parent) {
-	    var p = x.parent;
-	    if (!p.parent) {
-	      if (p.left === x) { this.rotateRight(p); }
-	      else            { this.rotateLeft(p); }
-	    } else if (p.left === x && p.parent.left === p) {
-	      this.rotateRight(p.parent);
-	      this.rotateRight(p);
-	    } else if (p.right === x && p.parent.right === p) {
-	      this.rotateLeft(p.parent);
-	      this.rotateLeft(p);
-	    } else if (p.left === x && p.parent.right === p) {
-	      this.rotateRight(p);
-	      this.rotateLeft(p);
-	    } else {
-	      this.rotateLeft(p);
-	      this.rotateRight(p);
+	  return QAItem;
+	}();
+	QAItem.nextId = -1;
+
+	//
+	// Optionally, split only the given ways, if multiple ways share
+	// the given node.
+	//
+	// This is the inverse of `iD.actionJoin`.
+	//
+	// For testing convenience, accepts an ID to assign to the new way.
+	// Normally, this will be undefined and the way will automatically
+	// be assigned a new ID.
+	//
+	// Reference:
+	//   https://github.com/systemed/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/SplitWayAction.as
+	//
+
+	function actionSplit(nodeIds, newWayIds) {
+	  // accept single ID for backwards-compatiblity
+	  if (typeof nodeIds === 'string') nodeIds = [nodeIds];
+
+	  var _wayIDs; // the strategy for picking which way will have a new version and which way is newly created
+
+
+	  var _keepHistoryOn = 'longest'; // 'longest', 'first'
+	  // The IDs of the ways actually created by running this action
+
+	  var _createdWayIDs = [];
+
+	  function dist(graph, nA, nB) {
+	    var locA = graph.entity(nA).loc;
+	    var locB = graph.entity(nB).loc;
+	    var epsilon = 1e-6;
+	    return locA && locB ? geoSphericalDistance(locA, locB) : epsilon;
+	  } // If the way is closed, we need to search for a partner node
+	  // to split the way at.
+	  //
+	  // The following looks for a node that is both far away from
+	  // the initial node in terms of way segment length and nearby
+	  // in terms of beeline-distance. This assures that areas get
+	  // split on the most "natural" points (independent of the number
+	  // of nodes).
+	  // For example: bone-shaped areas get split across their waist
+	  // line, circles across the diameter.
+
+
+	  function splitArea(nodes, idxA, graph) {
+	    var lengths = new Array(nodes.length);
+	    var length;
+	    var i;
+	    var best = 0;
+	    var idxB;
+
+	    function wrap(index) {
+	      return utilWrap(index, nodes.length);
+	    } // calculate lengths
+
+
+	    length = 0;
+
+	    for (i = wrap(idxA + 1); i !== idxA; i = wrap(i + 1)) {
+	      length += dist(graph, nodes[i], nodes[wrap(i - 1)]);
+	      lengths[i] = length;
+	    }
+
+	    length = 0;
+
+	    for (i = wrap(idxA - 1); i !== idxA; i = wrap(i - 1)) {
+	      length += dist(graph, nodes[i], nodes[wrap(i + 1)]);
+
+	      if (length < lengths[i]) {
+	        lengths[i] = length;
+	      }
+	    } // determine best opposite node to split
+
+
+	    for (i = 0; i < nodes.length; i++) {
+	      var cost = lengths[i] / dist(graph, nodes[idxA], nodes[i]);
+
+	      if (cost > best) {
+	        idxB = i;
+	        best = cost;
+	      }
 	    }
+
+	    return idxB;
+	  }
+
+	  function totalLengthBetweenNodes(graph, nodes) {
+	    var totalLength = 0;
+
+	    for (var i = 0; i < nodes.length - 1; i++) {
+	      totalLength += dist(graph, nodes[i], nodes[i + 1]);
+	    }
+
+	    return totalLength;
 	  }
-	};
 
+	  function split(graph, nodeId, wayA, newWayId) {
+	    var wayB = osmWay({
+	      id: newWayId,
+	      tags: wayA.tags
+	    }); // `wayB` is the NEW way
 
-	SplayTree.prototype.splay = function splay (x) {
-	  var p, gp, ggp, l, r;
+	    var origNodes = wayA.nodes.slice();
+	    var nodesA;
+	    var nodesB;
+	    var isArea = wayA.isArea();
+	    var isOuter = osmIsOldMultipolygonOuterMember(wayA, graph);
 
-	  while (x.parent) {
-	    p = x.parent;
-	    gp = p.parent;
+	    if (wayA.isClosed()) {
+	      var nodes = wayA.nodes.slice(0, -1);
+	      var idxA = nodes.indexOf(nodeId);
+	      var idxB = splitArea(nodes, idxA, graph);
 
-	    if (gp && gp.parent) {
-	      ggp = gp.parent;
-	      if (ggp.left === gp) { ggp.left= x; }
-	      else               { ggp.right = x; }
-	      x.parent = ggp;
+	      if (idxB < idxA) {
+	        nodesA = nodes.slice(idxA).concat(nodes.slice(0, idxB + 1));
+	        nodesB = nodes.slice(idxB, idxA + 1);
+	      } else {
+	        nodesA = nodes.slice(idxA, idxB + 1);
+	        nodesB = nodes.slice(idxB).concat(nodes.slice(0, idxA + 1));
+	      }
 	    } else {
-	      x.parent = null;
-	      this._root = x;
+	      var idx = wayA.nodes.indexOf(nodeId, 1);
+	      nodesA = wayA.nodes.slice(0, idx + 1);
+	      nodesB = wayA.nodes.slice(idx);
 	    }
 
-	    l = x.left; r = x.right;
+	    var lengthA = totalLengthBetweenNodes(graph, nodesA);
+	    var lengthB = totalLengthBetweenNodes(graph, nodesB);
 
-	    if (x === p.left) { // left
-	      if (gp) {
-	        if (gp.left === p) {
-	          /* zig-zig */
-	          if (p.right) {
-	            gp.left = p.right;
-	            gp.left.parent = gp;
-	          } else { gp.left = null; }
+	    if (_keepHistoryOn === 'longest' && lengthB > lengthA) {
+	      // keep the history on the longer way, regardless of the node count
+	      wayA = wayA.update({
+	        nodes: nodesB
+	      });
+	      wayB = wayB.update({
+	        nodes: nodesA
+	      });
+	      var temp = lengthA;
+	      lengthA = lengthB;
+	      lengthB = temp;
+	    } else {
+	      wayA = wayA.update({
+	        nodes: nodesA
+	      });
+	      wayB = wayB.update({
+	        nodes: nodesB
+	      });
+	    }
+
+	    if (wayA.tags.step_count) {
+	      // divide up the the step count proportionally between the two ways
+	      var stepCount = parseFloat(wayA.tags.step_count);
+
+	      if (stepCount && // ensure a number
+	      isFinite(stepCount) && // ensure positive
+	      stepCount > 0 && // ensure integer
+	      Math.round(stepCount) === stepCount) {
+	        var tagsA = Object.assign({}, wayA.tags);
+	        var tagsB = Object.assign({}, wayB.tags);
+	        var ratioA = lengthA / (lengthA + lengthB);
+	        var countA = Math.round(stepCount * ratioA);
+	        tagsA.step_count = countA.toString();
+	        tagsB.step_count = (stepCount - countA).toString();
+	        wayA = wayA.update({
+	          tags: tagsA
+	        });
+	        wayB = wayB.update({
+	          tags: tagsB
+	        });
+	      }
+	    }
+
+	    graph = graph.replace(wayA);
+	    graph = graph.replace(wayB);
+	    graph.parentRelations(wayA).forEach(function (relation) {
+	      var member; // Turn restrictions - make sure:
+	      // 1. Splitting a FROM/TO way - only `wayA` OR `wayB` remains in relation
+	      //    (whichever one is connected to the VIA node/ways)
+	      // 2. Splitting a VIA way - `wayB` remains in relation as a VIA way
+
+	      if (relation.hasFromViaTo()) {
+	        var f = relation.memberByRole('from');
+	        var v = relation.membersByRole('via');
+	        var t = relation.memberByRole('to');
+	        var i; // 1. split a FROM/TO
+
+	        if (f.id === wayA.id || t.id === wayA.id) {
+	          var keepB = false;
+
+	          if (v.length === 1 && v[0].type === 'node') {
+	            // check via node
+	            keepB = wayB.contains(v[0].id);
+	          } else {
+	            // check via way(s)
+	            for (i = 0; i < v.length; i++) {
+	              if (v[i].type === 'way') {
+	                var wayVia = graph.hasEntity(v[i].id);
+
+	                if (wayVia && utilArrayIntersection(wayB.nodes, wayVia.nodes).length) {
+	                  keepB = true;
+	                  break;
+	                }
+	              }
+	            }
+	          }
+
+	          if (keepB) {
+	            relation = relation.replaceMember(wayA, wayB);
+	            graph = graph.replace(relation);
+	          } // 2. split a VIA
 
-	          p.right = gp;
-	          gp.parent = p;
-	        } else {
-	          /* zig-zag */
-	          if (l) {
-	            gp.right = l;
-	            l.parent = gp;
-	          } else { gp.right = null; }
-
-	          x.left  = gp;
-	          gp.parent = x;
-	        }
-	      }
-	      if (r) {
-	        p.left = r;
-	        r.parent = p;
-	      } else { p.left = null; }
-
-	      x.right= p;
-	      p.parent = x;
-	    } else { // right
-	      if (gp) {
-	        if (gp.right === p) {
-	          /* zig-zig */
-	          if (p.left) {
-	            gp.right = p.left;
-	            gp.right.parent = gp;
-	          } else { gp.right = null; }
-
-	          p.left = gp;
-	          gp.parent = p;
 	        } else {
-	          /* zig-zag */
-	          if (r) {
-	            gp.left = r;
-	            r.parent = gp;
-	          } else { gp.left = null; }
+	          for (i = 0; i < v.length; i++) {
+	            if (v[i].type === 'way' && v[i].id === wayA.id) {
+	              member = {
+	                id: wayB.id,
+	                type: 'way',
+	                role: 'via'
+	              };
+	              graph = actionAddMember(relation.id, member, v[i].index + 1)(graph);
+	              break;
+	            }
+	          }
+	        } // All other relations (Routes, Multipolygons, etc):
+	        // 1. Both `wayA` and `wayB` remain in the relation
+	        // 2. But must be inserted as a pair (see `actionAddMember` for details)
 
-	          x.right = gp;
-	          gp.parent = x;
+	      } else {
+	        if (relation === isOuter) {
+	          graph = graph.replace(relation.mergeTags(wayA.tags));
+	          graph = graph.replace(wayA.update({
+	            tags: {}
+	          }));
+	          graph = graph.replace(wayB.update({
+	            tags: {}
+	          }));
 	        }
+
+	        member = {
+	          id: wayB.id,
+	          type: 'way',
+	          role: relation.memberById(wayA.id).role
+	        };
+	        var insertPair = {
+	          originalID: wayA.id,
+	          insertedID: wayB.id,
+	          nodes: origNodes
+	        };
+	        graph = actionAddMember(relation.id, member, undefined, insertPair)(graph);
 	      }
-	      if (l) {
-	        p.right = l;
-	        l.parent = p;
-	      } else { p.right = null; }
+	    });
 
-	      x.left = p;
-	      p.parent = x;
+	    if (!isOuter && isArea) {
+	      var multipolygon = osmRelation({
+	        tags: Object.assign({}, wayA.tags, {
+	          type: 'multipolygon'
+	        }),
+	        members: [{
+	          id: wayA.id,
+	          role: 'outer',
+	          type: 'way'
+	        }, {
+	          id: wayB.id,
+	          role: 'outer',
+	          type: 'way'
+	        }]
+	      });
+	      graph = graph.replace(multipolygon);
+	      graph = graph.replace(wayA.update({
+	        tags: {}
+	      }));
+	      graph = graph.replace(wayB.update({
+	        tags: {}
+	      }));
 	    }
+
+	    _createdWayIDs.push(wayB.id);
+
+	    return graph;
 	  }
-	};
 
+	  var action = function action(graph) {
+	    _createdWayIDs = [];
+	    var newWayIndex = 0;
 
-	SplayTree.prototype.replace = function replace (u, v) {
-	  if (!u.parent) { this._root = v; }
-	  else if (u === u.parent.left) { u.parent.left = v; }
-	  else { u.parent.right = v; }
-	  if (v) { v.parent = u.parent; }
-	};
+	    for (var i = 0; i < nodeIds.length; i++) {
+	      var nodeId = nodeIds[i];
+	      var candidates = action.waysForNode(nodeId, graph);
 
+	      for (var j = 0; j < candidates.length; j++) {
+	        graph = split(graph, nodeId, candidates[j], newWayIds && newWayIds[newWayIndex]);
+	        newWayIndex += 1;
+	      }
+	    }
 
-	SplayTree.prototype.minNode = function minNode (u) {
-	    if ( u === void 0 ) u = this._root;
+	    return graph;
+	  };
 
-	  if (u) { while (u.left) { u = u.left; } }
-	  return u;
-	};
+	  action.getCreatedWayIDs = function () {
+	    return _createdWayIDs;
+	  };
 
+	  action.waysForNode = function (nodeId, graph) {
+	    var node = graph.entity(nodeId);
+	    var splittableParents = graph.parentWays(node).filter(isSplittable);
 
-	SplayTree.prototype.maxNode = function maxNode (u) {
-	    if ( u === void 0 ) u = this._root;
+	    if (!_wayIDs) {
+	      // If the ways to split aren't specified, only split the lines.
+	      // If there are no lines to split, split the areas.
+	      var hasLine = splittableParents.some(function (parent) {
+	        return parent.geometry(graph) === 'line';
+	      });
 
-	  if (u) { while (u.right) { u = u.right; } }
-	  return u;
-	};
+	      if (hasLine) {
+	        return splittableParents.filter(function (parent) {
+	          return parent.geometry(graph) === 'line';
+	        });
+	      }
+	    }
 
+	    return splittableParents;
 
-	SplayTree.prototype.insert = function insert (key, data) {
-	  var z = this._root;
-	  var p = null;
-	  var comp = this._compare;
-	  var cmp;
+	    function isSplittable(parent) {
+	      // If the ways to split are specified, ignore everything else.
+	      if (_wayIDs && _wayIDs.indexOf(parent.id) === -1) return false; // We can fake splitting closed ways at their endpoints...
 
-	  if (this._noDuplicates) {
-	    while (z) {
-	      p = z;
-	      cmp = comp(z.key, key);
-	      if (cmp === 0) { return; }
-	      else if (comp(z.key, key) < 0) { z = z.right; }
-	      else { z = z.left; }
-	    }
-	  } else {
-	    while (z) {
-	      p = z;
-	      if (comp(z.key, key) < 0) { z = z.right; }
-	      else { z = z.left; }
-	    }
-	  }
+	      if (parent.isClosed()) return true; // otherwise, we can't split nodes at their endpoints.
 
-	  z = { key: key, data: data, left: null, right: null, parent: p };
+	      for (var i = 1; i < parent.nodes.length - 1; i++) {
+	        if (parent.nodes[i] === nodeId) return true;
+	      }
 
-	  if (!p)                        { this._root = z; }
-	  else if (comp(p.key, z.key) < 0) { p.right = z; }
-	  else                           { p.left= z; }
+	      return false;
+	    }
+	  };
 
-	  this.splay(z);
-	  this._size++;
-	  return z;
-	};
+	  action.ways = function (graph) {
+	    return utilArrayUniq([].concat.apply([], nodeIds.map(function (nodeId) {
+	      return action.waysForNode(nodeId, graph);
+	    })));
+	  };
 
+	  action.disabled = function (graph) {
+	    for (var i = 0; i < nodeIds.length; i++) {
+	      var nodeId = nodeIds[i];
+	      var candidates = action.waysForNode(nodeId, graph);
 
-	SplayTree.prototype.find = function find (key) {
-	  var z  = this._root;
-	  var comp = this._compare;
-	  while (z) {
-	    var cmp = comp(z.key, key);
-	    if    (cmp < 0) { z = z.right; }
-	    else if (cmp > 0) { z = z.left; }
-	    else            { return z; }
-	  }
-	  return null;
-	};
+	      if (candidates.length === 0 || _wayIDs && _wayIDs.length !== candidates.length) {
+	        return 'not_eligible';
+	      }
+	    }
+	  };
 
-	/**
-	 * Whether the tree contains a node with the given key
-	 * @param{Key} key
-	 * @return {boolean} true/false
-	 */
-	SplayTree.prototype.contains = function contains (key) {
-	  var node     = this._root;
-	  var comparator = this._compare;
-	  while (node){
-	    var cmp = comparator(key, node.key);
-	    if    (cmp === 0) { return true; }
-	    else if (cmp < 0) { node = node.left; }
-	    else              { node = node.right; }
-	  }
+	  action.limitWays = function (val) {
+	    if (!arguments.length) return _wayIDs;
+	    _wayIDs = val;
+	    return action;
+	  };
 
-	  return false;
-	};
+	  action.keepHistoryOn = function (val) {
+	    if (!arguments.length) return _keepHistoryOn;
+	    _keepHistoryOn = val;
+	    return action;
+	  };
 
+	  return action;
+	}
 
-	SplayTree.prototype.remove = function remove (key) {
-	  var z = this.find(key);
+	function coreGraph(other, mutable) {
+	  if (!(this instanceof coreGraph)) return new coreGraph(other, mutable);
 
-	  if (!z) { return false; }
+	  if (other instanceof coreGraph) {
+	    var base = other.base();
+	    this.entities = Object.assign(Object.create(base.entities), other.entities);
+	    this._parentWays = Object.assign(Object.create(base.parentWays), other._parentWays);
+	    this._parentRels = Object.assign(Object.create(base.parentRels), other._parentRels);
+	  } else {
+	    this.entities = Object.create({});
+	    this._parentWays = Object.create({});
+	    this._parentRels = Object.create({});
+	    this.rebase(other || [], [this]);
+	  }
 
-	  this.splay(z);
+	  this.transients = {};
+	  this._childNodes = {};
+	  this.frozen = !mutable;
+	}
+	coreGraph.prototype = {
+	  hasEntity: function hasEntity(id) {
+	    return this.entities[id];
+	  },
+	  entity: function entity(id) {
+	    var entity = this.entities[id]; //https://github.com/openstreetmap/iD/issues/3973#issuecomment-307052376
 
-	  if (!z.left) { this.replace(z, z.right); }
-	  else if (!z.right) { this.replace(z, z.left); }
-	  else {
-	    var y = this.minNode(z.right);
-	    if (y.parent !== z) {
-	      this.replace(y, y.right);
-	      y.right = z.right;
-	      y.right.parent = y;
+	    if (!entity) {
+	      entity = this.entities.__proto__[id]; // eslint-disable-line no-proto
 	    }
-	    this.replace(z, y);
-	    y.left = z.left;
-	    y.left.parent = y;
-	  }
 
-	  this._size--;
-	  return true;
-	};
+	    if (!entity) {
+	      throw new Error('entity ' + id + ' not found');
+	    }
 
+	    return entity;
+	  },
+	  geometry: function geometry(id) {
+	    return this.entity(id).geometry(this);
+	  },
+	  "transient": function transient(entity, key, fn) {
+	    var id = entity.id;
+	    var transients = this.transients[id] || (this.transients[id] = {});
 
-	SplayTree.prototype.removeNode = function removeNode (z) {
-	  if (!z) { return false; }
+	    if (transients[key] !== undefined) {
+	      return transients[key];
+	    }
 
-	  this.splay(z);
+	    transients[key] = fn.call(entity);
+	    return transients[key];
+	  },
+	  parentWays: function parentWays(entity) {
+	    var parents = this._parentWays[entity.id];
+	    var result = [];
 
-	  if (!z.left) { this.replace(z, z.right); }
-	  else if (!z.right) { this.replace(z, z.left); }
-	  else {
-	    var y = this.minNode(z.right);
-	    if (y.parent !== z) {
-	      this.replace(y, y.right);
-	      y.right = z.right;
-	      y.right.parent = y;
+	    if (parents) {
+	      parents.forEach(function (id) {
+	        result.push(this.entity(id));
+	      }, this);
 	    }
-	    this.replace(z, y);
-	    y.left = z.left;
-	    y.left.parent = y;
-	  }
 
-	  this._size--;
-	  return true;
-	};
+	    return result;
+	  },
+	  isPoi: function isPoi(entity) {
+	    var parents = this._parentWays[entity.id];
+	    return !parents || parents.size === 0;
+	  },
+	  isShared: function isShared(entity) {
+	    var parents = this._parentWays[entity.id];
+	    return parents && parents.size > 1;
+	  },
+	  parentRelations: function parentRelations(entity) {
+	    var parents = this._parentRels[entity.id];
+	    var result = [];
 
+	    if (parents) {
+	      parents.forEach(function (id) {
+	        result.push(this.entity(id));
+	      }, this);
+	    }
 
-	SplayTree.prototype.erase = function erase (key) {
-	  var z = this.find(key);
-	  if (!z) { return; }
+	    return result;
+	  },
+	  parentMultipolygons: function parentMultipolygons(entity) {
+	    return this.parentRelations(entity).filter(function (relation) {
+	      return relation.isMultipolygon();
+	    });
+	  },
+	  childNodes: function childNodes(entity) {
+	    if (this._childNodes[entity.id]) return this._childNodes[entity.id];
+	    if (!entity.nodes) return [];
+	    var nodes = [];
 
-	  this.splay(z);
+	    for (var i = 0; i < entity.nodes.length; i++) {
+	      nodes[i] = this.entity(entity.nodes[i]);
+	    }
+	    this._childNodes[entity.id] = nodes;
+	    return this._childNodes[entity.id];
+	  },
+	  base: function base() {
+	    return {
+	      'entities': Object.getPrototypeOf(this.entities),
+	      'parentWays': Object.getPrototypeOf(this._parentWays),
+	      'parentRels': Object.getPrototypeOf(this._parentRels)
+	    };
+	  },
+	  // Unlike other graph methods, rebase mutates in place. This is because it
+	  // is used only during the history operation that merges newly downloaded
+	  // data into each state. To external consumers, it should appear as if the
+	  // graph always contained the newly downloaded data.
+	  rebase: function rebase(entities, stack, force) {
+	    var base = this.base();
+	    var i, j, k, id;
 
-	  var s = z.left;
-	  var t = z.right;
+	    for (i = 0; i < entities.length; i++) {
+	      var entity = entities[i];
+	      if (!entity.visible || !force && base.entities[entity.id]) continue; // Merging data into the base graph
 
-	  var sMax = null;
-	  if (s) {
-	    s.parent = null;
-	    sMax = this.maxNode(s);
-	    this.splay(sMax);
-	    this._root = sMax;
-	  }
-	  if (t) {
-	    if (s) { sMax.right = t; }
-	    else { this._root = t; }
-	    t.parent = sMax;
-	  }
+	      base.entities[entity.id] = entity;
 
-	  this._size--;
-	};
+	      this._updateCalculated(undefined, entity, base.parentWays, base.parentRels); // Restore provisionally-deleted nodes that are discovered to have an extant parent
 
-	/**
-	 * Removes and returns the node with smallest key
-	 * @return {?Node}
-	 */
-	SplayTree.prototype.pop = function pop () {
-	  var node = this._root, returnValue = null;
-	  if (node) {
-	    while (node.left) { node = node.left; }
-	    returnValue = { key: node.key, data: node.data };
-	    this.remove(node.key);
-	  }
-	  return returnValue;
-	};
 
+	      if (entity.type === 'way') {
+	        for (j = 0; j < entity.nodes.length; j++) {
+	          id = entity.nodes[j];
 
-	/* eslint-disable class-methods-use-this */
+	          for (k = 1; k < stack.length; k++) {
+	            var ents = stack[k].entities;
 
-	/**
-	 * Successor node
-	 * @param{Node} node
-	 * @return {?Node}
-	 */
-	SplayTree.prototype.next = function next (node) {
-	  var successor = node;
-	  if (successor) {
-	    if (successor.right) {
-	      successor = successor.right;
-	      while (successor && successor.left) { successor = successor.left; }
-	    } else {
-	      successor = node.parent;
-	      while (successor && successor.right === node) {
-	        node = successor; successor = successor.parent;
+	            if (ents.hasOwnProperty(id) && ents[id] === undefined) {
+	              delete ents[id];
+	            }
+	          }
+	        }
 	      }
 	    }
-	  }
-	  return successor;
-	};
 
+	    for (i = 0; i < stack.length; i++) {
+	      stack[i]._updateRebased();
+	    }
+	  },
+	  _updateRebased: function _updateRebased() {
+	    var base = this.base();
+	    Object.keys(this._parentWays).forEach(function (child) {
+	      if (base.parentWays[child]) {
+	        base.parentWays[child].forEach(function (id) {
+	          if (!this.entities.hasOwnProperty(id)) {
+	            this._parentWays[child].add(id);
+	          }
+	        }, this);
+	      }
+	    }, this);
+	    Object.keys(this._parentRels).forEach(function (child) {
+	      if (base.parentRels[child]) {
+	        base.parentRels[child].forEach(function (id) {
+	          if (!this.entities.hasOwnProperty(id)) {
+	            this._parentRels[child].add(id);
+	          }
+	        }, this);
+	      }
+	    }, this);
+	    this.transients = {}; // this._childNodes is not updated, under the assumption that
+	    // ways are always downloaded with their child nodes.
+	  },
+	  // Updates calculated properties (parentWays, parentRels) for the specified change
+	  _updateCalculated: function _updateCalculated(oldentity, entity, parentWays, parentRels) {
+	    parentWays = parentWays || this._parentWays;
+	    parentRels = parentRels || this._parentRels;
+	    var type = entity && entity.type || oldentity && oldentity.type;
+	    var removed, added, i;
+
+	    if (type === 'way') {
+	      // Update parentWays
+	      if (oldentity && entity) {
+	        removed = utilArrayDifference(oldentity.nodes, entity.nodes);
+	        added = utilArrayDifference(entity.nodes, oldentity.nodes);
+	      } else if (oldentity) {
+	        removed = oldentity.nodes;
+	        added = [];
+	      } else if (entity) {
+	        removed = [];
+	        added = entity.nodes;
+	      }
 
-	/**
-	 * Predecessor node
-	 * @param{Node} node
-	 * @return {?Node}
-	 */
-	SplayTree.prototype.prev = function prev (node) {
-	  var predecessor = node;
-	  if (predecessor) {
-	    if (predecessor.left) {
-	      predecessor = predecessor.left;
-	      while (predecessor && predecessor.right) { predecessor = predecessor.right; }
-	    } else {
-	      predecessor = node.parent;
-	      while (predecessor && predecessor.left === node) {
-	        node = predecessor;
-	        predecessor = predecessor.parent;
+	      for (i = 0; i < removed.length; i++) {
+	        // make a copy of prototype property, store as own property, and update..
+	        parentWays[removed[i]] = new Set(parentWays[removed[i]]);
+	        parentWays[removed[i]]["delete"](oldentity.id);
 	      }
-	    }
-	  }
-	  return predecessor;
-	};
-	/* eslint-enable class-methods-use-this */
 
+	      for (i = 0; i < added.length; i++) {
+	        // make a copy of prototype property, store as own property, and update..
+	        parentWays[added[i]] = new Set(parentWays[added[i]]);
+	        parentWays[added[i]].add(entity.id);
+	      }
+	    } else if (type === 'relation') {
+	      // Update parentRels
+	      // diff only on the IDs since the same entity can be a member multiple times with different roles
+	      var oldentityMemberIDs = oldentity ? oldentity.members.map(function (m) {
+	        return m.id;
+	      }) : [];
+	      var entityMemberIDs = entity ? entity.members.map(function (m) {
+	        return m.id;
+	      }) : [];
+
+	      if (oldentity && entity) {
+	        removed = utilArrayDifference(oldentityMemberIDs, entityMemberIDs);
+	        added = utilArrayDifference(entityMemberIDs, oldentityMemberIDs);
+	      } else if (oldentity) {
+	        removed = oldentityMemberIDs;
+	        added = [];
+	      } else if (entity) {
+	        removed = [];
+	        added = entityMemberIDs;
+	      }
 
-	/**
-	 * @param{forEachCallback} callback
-	 * @return {SplayTree}
-	 */
-	SplayTree.prototype.forEach = function forEach (callback) {
-	  var current = this._root;
-	  var s = [], done = false, i = 0;
+	      for (i = 0; i < removed.length; i++) {
+	        // make a copy of prototype property, store as own property, and update..
+	        parentRels[removed[i]] = new Set(parentRels[removed[i]]);
+	        parentRels[removed[i]]["delete"](oldentity.id);
+	      }
 
-	  while (!done) {
-	    // Reach the left most Node of the current Node
-	    if (current) {
-	      // Place pointer to a tree node on the stack
-	      // before traversing the node's left subtree
-	      s.push(current);
-	      current = current.left;
-	    } else {
-	      // BackTrack from the empty subtree and visit the Node
-	      // at the top of the stack; however, if the stack is
-	      // empty you are done
-	      if (s.length > 0) {
-	        current = s.pop();
-	        callback(current, i++);
-
-	        // We have visited the node and its left
-	        // subtree. Now, it's right subtree's turn
-	        current = current.right;
-	      } else { done = true; }
+	      for (i = 0; i < added.length; i++) {
+	        // make a copy of prototype property, store as own property, and update..
+	        parentRels[added[i]] = new Set(parentRels[added[i]]);
+	        parentRels[added[i]].add(entity.id);
+	      }
 	    }
-	  }
-	  return this;
-	};
+	  },
+	  replace: function replace(entity) {
+	    if (this.entities[entity.id] === entity) return this;
+	    return this.update(function () {
+	      this._updateCalculated(this.entities[entity.id], entity);
 
+	      this.entities[entity.id] = entity;
+	    });
+	  },
+	  remove: function remove(entity) {
+	    return this.update(function () {
+	      this._updateCalculated(entity, undefined);
 
-	/**
-	 * Walk key range from `low` to `high`. Stops if `fn` returns a value.
-	 * @param{Key}    low
-	 * @param{Key}    high
-	 * @param{Function} fn
-	 * @param{*?}     ctx
-	 * @return {SplayTree}
-	 */
-	SplayTree.prototype.range = function range (low, high, fn, ctx) {
-	  var Q = [];
-	  var compare = this._compare;
-	  var node = this._root, cmp;
+	      this.entities[entity.id] = undefined;
+	    });
+	  },
+	  revert: function revert(id) {
+	    var baseEntity = this.base().entities[id];
+	    var headEntity = this.entities[id];
+	    if (headEntity === baseEntity) return this;
+	    return this.update(function () {
+	      this._updateCalculated(headEntity, baseEntity);
+
+	      delete this.entities[id];
+	    });
+	  },
+	  update: function update() {
+	    var graph = this.frozen ? coreGraph(this, true) : this;
 
-	  while (Q.length !== 0 || node) {
-	    if (node) {
-	      Q.push(node);
-	      node = node.left;
-	    } else {
-	      node = Q.pop();
-	      cmp = compare(node.key, high);
-	      if (cmp > 0) {
-	        break;
-	      } else if (compare(node.key, low) >= 0) {
-	        if (fn.call(ctx, node)) { return this; } // stop if smth is returned
-	      }
-	      node = node.right;
+	    for (var i = 0; i < arguments.length; i++) {
+	      arguments[i].call(graph, graph);
+	    }
+
+	    if (this.frozen) graph.frozen = true;
+	    return graph;
+	  },
+	  // Obliterates any existing entities
+	  load: function load(entities) {
+	    var base = this.base();
+	    this.entities = Object.create(base.entities);
+
+	    for (var i in entities) {
+	      this.entities[i] = entities[i];
+
+	      this._updateCalculated(base.entities[i], this.entities[i]);
 	    }
+
+	    return this;
 	  }
-	  return this;
 	};
 
-	/**
-	 * Returns all keys in order
-	 * @return {Array<Key>}
-	 */
-	SplayTree.prototype.keys = function keys () {
-	  var current = this._root;
-	  var s = [], r = [], done = false;
+	function osmTurn(turn) {
+	  if (!(this instanceof osmTurn)) {
+	    return new osmTurn(turn);
+	  }
 
-	  while (!done) {
-	    if (current) {
-	      s.push(current);
-	      current = current.left;
-	    } else {
-	      if (s.length > 0) {
-	        current = s.pop();
-	        r.push(current.key);
-	        current = current.right;
-	      } else { done = true; }
-	    }
+	  Object.assign(this, turn);
+	}
+	function osmIntersection(graph, startVertexId, maxDistance) {
+	  maxDistance = maxDistance || 30; // in meters
+
+	  var vgraph = coreGraph(); // virtual graph
+
+	  var i, j, k;
+
+	  function memberOfRestriction(entity) {
+	    return graph.parentRelations(entity).some(function (r) {
+	      return r.isRestriction();
+	    });
 	  }
-	  return r;
-	};
 
+	  function isRoad(way) {
+	    if (way.isArea() || way.isDegenerate()) return false;
+	    var roads = {
+	      'motorway': true,
+	      'motorway_link': true,
+	      'trunk': true,
+	      'trunk_link': true,
+	      'primary': true,
+	      'primary_link': true,
+	      'secondary': true,
+	      'secondary_link': true,
+	      'tertiary': true,
+	      'tertiary_link': true,
+	      'residential': true,
+	      'unclassified': true,
+	      'living_street': true,
+	      'service': true,
+	      'road': true,
+	      'track': true
+	    };
+	    return roads[way.tags.highway];
+	  }
+
+	  var startNode = graph.entity(startVertexId);
+	  var checkVertices = [startNode];
+	  var checkWays;
+	  var vertices = [];
+	  var vertexIds = [];
+	  var vertex;
+	  var ways = [];
+	  var wayIds = [];
+	  var way;
+	  var nodes = [];
+	  var node;
+	  var parents = [];
+	  var parent; // `actions` will store whatever actions must be performed to satisfy
+	  // preconditions for adding a turn restriction to this intersection.
+	  //  - Remove any existing degenerate turn restrictions (missing from/to, etc)
+	  //  - Reverse oneways so that they are drawn in the forward direction
+	  //  - Split ways on key vertices
+
+	  var actions = []; // STEP 1:  walk the graph outwards from starting vertex to search
+	  //  for more key vertices and ways to include in the intersection..
+
+	  while (checkVertices.length) {
+	    vertex = checkVertices.pop(); // check this vertex for parent ways that are roads
+
+	    checkWays = graph.parentWays(vertex);
+	    var hasWays = false;
+
+	    for (i = 0; i < checkWays.length; i++) {
+	      way = checkWays[i];
+	      if (!isRoad(way) && !memberOfRestriction(way)) continue;
+	      ways.push(way); // it's a road, or it's already in a turn restriction
+
+	      hasWays = true; // check the way's children for more key vertices
+
+	      nodes = utilArrayUniq(graph.childNodes(way));
+
+	      for (j = 0; j < nodes.length; j++) {
+	        node = nodes[j];
+	        if (node === vertex) continue; // same thing
+
+	        if (vertices.indexOf(node) !== -1) continue; // seen it already
+
+	        if (geoSphericalDistance(node.loc, startNode.loc) > maxDistance) continue; // too far from start
+	        // a key vertex will have parents that are also roads
+
+	        var hasParents = false;
+	        parents = graph.parentWays(node);
+
+	        for (k = 0; k < parents.length; k++) {
+	          parent = parents[k];
+	          if (parent === way) continue; // same thing
+
+	          if (ways.indexOf(parent) !== -1) continue; // seen it already
+
+	          if (!isRoad(parent)) continue; // not a road
+
+	          hasParents = true;
+	          break;
+	        }
 
-	/**
-	 * Returns `data` fields of all nodes in order.
-	 * @return {Array<Value>}
-	 */
-	SplayTree.prototype.values = function values () {
-	  var current = this._root;
-	  var s = [], r = [], done = false;
+	        if (hasParents) {
+	          checkVertices.push(node);
+	        }
+	      }
+	    }
 
-	  while (!done) {
-	    if (current) {
-	      s.push(current);
-	      current = current.left;
-	    } else {
-	      if (s.length > 0) {
-	        current = s.pop();
-	        r.push(current.data);
-	        current = current.right;
-	      } else { done = true; }
+	    if (hasWays) {
+	      vertices.push(vertex);
 	    }
 	  }
-	  return r;
-	};
 
+	  vertices = utilArrayUniq(vertices);
+	  ways = utilArrayUniq(ways); // STEP 2:  Build a virtual graph containing only the entities in the intersection..
+	  // Everything done after this step should act on the virtual graph
+	  // Any actions that must be performed later to the main graph go in `actions` array
 
-	/**
-	 * Returns node at given index
-	 * @param{number} index
-	 * @return {?Node}
-	 */
-	SplayTree.prototype.at = function at (index) {
-	  // removed after a consideration, more misleading than useful
-	  // index = index % this.size;
-	  // if (index < 0) index = this.size - index;
+	  ways.forEach(function (way) {
+	    graph.childNodes(way).forEach(function (node) {
+	      vgraph = vgraph.replace(node);
+	    });
+	    vgraph = vgraph.replace(way);
+	    graph.parentRelations(way).forEach(function (relation) {
+	      if (relation.isRestriction()) {
+	        if (relation.isValidRestriction(graph)) {
+	          vgraph = vgraph.replace(relation);
+	        } else if (relation.isComplete(graph)) {
+	          actions.push(actionDeleteRelation(relation.id));
+	        }
+	      }
+	    });
+	  }); // STEP 3:  Force all oneways to be drawn in the forward direction
 
-	  var current = this._root;
-	  var s = [], done = false, i = 0;
+	  ways.forEach(function (w) {
+	    var way = vgraph.entity(w.id);
 
-	  while (!done) {
-	    if (current) {
-	      s.push(current);
-	      current = current.left;
-	    } else {
-	      if (s.length > 0) {
-	        current = s.pop();
-	        if (i === index) { return current; }
-	        i++;
-	        current = current.right;
-	      } else { done = true; }
+	    if (way.tags.oneway === '-1') {
+	      var action = actionReverse(way.id, {
+	        reverseOneway: true
+	      });
+	      actions.push(action);
+	      vgraph = action(vgraph);
+	    }
+	  }); // STEP 4:  Split ways on key vertices
+
+	  var origCount = osmEntity.id.next.way;
+	  vertices.forEach(function (v) {
+	    // This is an odd way to do it, but we need to find all the ways that
+	    // will be split here, then split them one at a time to ensure that these
+	    // actions can be replayed on the main graph exactly in the same order.
+	    // (It is unintuitive, but the order of ways returned from graph.parentWays()
+	    // is arbitrary, depending on how the main graph and vgraph were built)
+	    var splitAll = actionSplit([v.id]).keepHistoryOn('first');
+
+	    if (!splitAll.disabled(vgraph)) {
+	      splitAll.ways(vgraph).forEach(function (way) {
+	        var splitOne = actionSplit([v.id]).limitWays([way.id]).keepHistoryOn('first');
+	        actions.push(splitOne);
+	        vgraph = splitOne(vgraph);
+	      });
 	    }
-	  }
-	  return null;
-	};
+	  }); // In here is where we should also split the intersection at nearby junction.
+	  //   for https://github.com/mapbox/iD-internal/issues/31
+	  // nearbyVertices.forEach(function(v) {
+	  // });
+	  // Reasons why we reset the way id count here:
+	  //  1. Continuity with way ids created by the splits so that we can replay
+	  //     these actions later if the user decides to create a turn restriction
+	  //  2. Avoids churning way ids just by hovering over a vertex
+	  //     and displaying the turn restriction editor
 
-	/**
-	 * Bulk-load items. Both array have to be same size
-	 * @param{Array<Key>}  keys
-	 * @param{Array<Value>}[values]
-	 * @param{Boolean}     [presort=false] Pre-sort keys and values, using
-	 *                                       tree's comparator. Sorting is done
-	 *                                       in-place
-	 * @return {AVLTree}
-	 */
-	SplayTree.prototype.load = function load (keys, values, presort) {
-	    if ( keys === void 0 ) keys = [];
-	    if ( values === void 0 ) values = [];
-	    if ( presort === void 0 ) presort = false;
-
-	  if (this._size !== 0) { throw new Error('bulk-load: tree is not empty'); }
-	  var size = keys.length;
-	  if (presort) { sort(keys, values, 0, size - 1, this._compare); }
-	  this._root = loadRecursive(null, keys, values, 0, size);
-	  this._size = size;
-	  return this;
-	};
+	  osmEntity.id.next.way = origCount; // STEP 5:  Update arrays to point to vgraph entities
 
+	  vertexIds = vertices.map(function (v) {
+	    return v.id;
+	  });
+	  vertices = [];
+	  ways = [];
+	  vertexIds.forEach(function (id) {
+	    var vertex = vgraph.entity(id);
+	    var parents = vgraph.parentWays(vertex);
+	    vertices.push(vertex);
+	    ways = ways.concat(parents);
+	  });
+	  vertices = utilArrayUniq(vertices);
+	  ways = utilArrayUniq(ways);
+	  vertexIds = vertices.map(function (v) {
+	    return v.id;
+	  });
+	  wayIds = ways.map(function (w) {
+	    return w.id;
+	  }); // STEP 6:  Update the ways with some metadata that will be useful for
+	  // walking the intersection graph later and rendering turn arrows.
 
-	SplayTree.prototype.min = function min () {
-	  var node = this.minNode(this._root);
-	  if (node) { return node.key; }
-	  else    { return null; }
-	};
+	  function withMetadata(way, vertexIds) {
+	    var __oneWay = way.isOneWay(); // which affixes are key vertices?
 
 
-	SplayTree.prototype.max = function max () {
-	  var node = this.maxNode(this._root);
-	  if (node) { return node.key; }
-	  else    { return null; }
-	};
+	    var __first = vertexIds.indexOf(way.first()) !== -1;
 
-	SplayTree.prototype.isEmpty = function isEmpty () { return this._root === null; };
-	prototypeAccessors.size.get = function () { return this._size; };
+	    var __last = vertexIds.indexOf(way.last()) !== -1; // what roles is this way eligible for?
 
 
-	/**
-	 * Create a tree and load it with items
-	 * @param{Array<Key>}        keys
-	 * @param{Array<Value>?}      [values]
-
-	 * @param{Function?}          [comparator]
-	 * @param{Boolean?}           [presort=false] Pre-sort keys and values, using
-	 *                                             tree's comparator. Sorting is done
-	 *                                             in-place
-	 * @param{Boolean?}           [noDuplicates=false] Allow duplicates
-	 * @return {SplayTree}
-	 */
-	SplayTree.createTree = function createTree (keys, values, comparator, presort, noDuplicates) {
-	  return new SplayTree(comparator, noDuplicates).load(keys, values, presort);
-	};
+	    var __via = __first && __last;
 
-	Object.defineProperties( SplayTree.prototype, prototypeAccessors );
+	    var __from = __first && !__oneWay || __last;
 
+	    var __to = __first || __last && !__oneWay;
 
-	function loadRecursive (parent, keys, values, start, end) {
-	  var size = end - start;
-	  if (size > 0) {
-	    var middle = start + Math.floor(size / 2);
-	    var key    = keys[middle];
-	    var data   = values[middle];
-	    var node   = { key: key, data: data, parent: parent };
-	    node.left    = loadRecursive(node, keys, values, start, middle);
-	    node.right   = loadRecursive(node, keys, values, middle + 1, end);
-	    return node;
+	    return way.update({
+	      __first: __first,
+	      __last: __last,
+	      __from: __from,
+	      __via: __via,
+	      __to: __to,
+	      __oneWay: __oneWay
+	    });
 	  }
-	  return null;
-	}
-
 
-	function sort(keys, values, left, right, compare) {
-	  if (left >= right) { return; }
+	  ways = [];
+	  wayIds.forEach(function (id) {
+	    var way = withMetadata(vgraph.entity(id), vertexIds);
+	    vgraph = vgraph.replace(way);
+	    ways.push(way);
+	  }); // STEP 7:  Simplify - This is an iterative process where we:
+	  //  1. Find trivial vertices with only 2 parents
+	  //  2. trim off the leaf way from those vertices and remove from vgraph
 
-	  var pivot = keys[(left + right) >> 1];
-	  var i = left - 1;
-	  var j = right + 1;
+	  var keepGoing;
+	  var removeWayIds = [];
+	  var removeVertexIds = [];
 
-	  while (true) {
-	    do { i++; } while (compare(keys[i], pivot) < 0);
-	    do { j--; } while (compare(keys[j], pivot) > 0);
-	    if (i >= j) { break; }
+	  do {
+	    keepGoing = false;
+	    checkVertices = vertexIds.slice();
 
-	    var tmp = keys[i];
-	    keys[i] = keys[j];
-	    keys[j] = tmp;
+	    for (i = 0; i < checkVertices.length; i++) {
+	      var vertexId = checkVertices[i];
+	      vertex = vgraph.hasEntity(vertexId);
 
-	    tmp = values[i];
-	    values[i] = values[j];
-	    values[j] = tmp;
-	  }
+	      if (!vertex) {
+	        if (vertexIds.indexOf(vertexId) !== -1) {
+	          vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
+	        }
 
-	  sort(keys, values,  left,     j, compare);
-	  sort(keys, values, j + 1, right, compare);
-	}
+	        removeVertexIds.push(vertexId);
+	        continue;
+	      }
 
-	var NORMAL               = 0;
-	var NON_CONTRIBUTING     = 1;
-	var SAME_TRANSITION      = 2;
-	var DIFFERENT_TRANSITION = 3;
+	      parents = vgraph.parentWays(vertex);
 
-	var INTERSECTION = 0;
-	var UNION        = 1;
-	var DIFFERENCE   = 2;
-	var XOR          = 3;
+	      if (parents.length < 3) {
+	        if (vertexIds.indexOf(vertexId) !== -1) {
+	          vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
+	        }
+	      }
 
-	/**
-	 * @param  {SweepEvent} event
-	 * @param  {SweepEvent} prev
-	 * @param  {Operation} operation
-	 */
-	function computeFields (event, prev, operation) {
-	  // compute inOut and otherInOut fields
-	  if (prev === null) {
-	    event.inOut      = false;
-	    event.otherInOut = true;
+	      if (parents.length === 2) {
+	        // vertex with 2 parents is trivial
+	        var a = parents[0];
+	        var b = parents[1];
+	        var aIsLeaf = a && !a.__via;
+	        var bIsLeaf = b && !b.__via;
+	        var leaf, survivor;
 
-	  // previous line segment in sweepline belongs to the same polygon
-	  } else {
-	    if (event.isSubject === prev.isSubject) {
-	      event.inOut      = !prev.inOut;
-	      event.otherInOut = prev.otherInOut;
+	        if (aIsLeaf && !bIsLeaf) {
+	          leaf = a;
+	          survivor = b;
+	        } else if (!aIsLeaf && bIsLeaf) {
+	          leaf = b;
+	          survivor = a;
+	        }
 
-	    // previous line segment in sweepline belongs to the clipping polygon
-	    } else {
-	      event.inOut      = !prev.otherInOut;
-	      event.otherInOut = prev.isVertical() ? !prev.inOut : prev.inOut;
-	    }
+	        if (leaf && survivor) {
+	          survivor = withMetadata(survivor, vertexIds); // update survivor way
 
-	    // compute prevInResult field
-	    if (prev) {
-	      event.prevInResult = (!inResult(prev, operation) || prev.isVertical())
-	        ? prev.prevInResult : prev;
-	    }
-	  }
+	          vgraph = vgraph.replace(survivor).remove(leaf); // update graph
 
-	  // check if the line segment belongs to the Boolean operation
-	  var isInResult = inResult(event, operation);
-	  if (isInResult) {
-	    event.resultTransition = determineResultTransition(event, operation);
-	  } else {
-	    event.resultTransition = 0;
-	  }
-	}
-
-
-	/* eslint-disable indent */
-	function inResult(event, operation) {
-	  switch (event.type) {
-	    case NORMAL:
-	      switch (operation) {
-	        case INTERSECTION:
-	          return !event.otherInOut;
-	        case UNION:
-	          return event.otherInOut;
-	        case DIFFERENCE:
-	          // return (event.isSubject && !event.otherInOut) ||
-	          //         (!event.isSubject && event.otherInOut);
-	          return (event.isSubject && event.otherInOut) ||
-	                  (!event.isSubject && !event.otherInOut);
-	        case XOR:
-	          return true;
+	          removeWayIds.push(leaf.id);
+	          keepGoing = true;
+	        }
 	      }
-	      break;
-	    case SAME_TRANSITION:
-	      return operation === INTERSECTION || operation === UNION;
-	    case DIFFERENT_TRANSITION:
-	      return operation === DIFFERENCE;
-	    case NON_CONTRIBUTING:
-	      return false;
-	  }
-	  return false;
-	}
-	/* eslint-enable indent */
 
+	      parents = vgraph.parentWays(vertex);
 
-	function determineResultTransition(event, operation) {
-	  var thisIn = !event.inOut;
-	  var thatIn = !event.otherInOut;
+	      if (parents.length < 2) {
+	        // vertex is no longer a key vertex
+	        if (vertexIds.indexOf(vertexId) !== -1) {
+	          vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
+	        }
 
-	  var isIn;
-	  switch (operation) {
-	    case INTERSECTION:
-	      isIn = thisIn && thatIn; break;
-	    case UNION:
-	      isIn = thisIn || thatIn; break;
-	    case XOR:
-	      isIn = thisIn ^ thatIn; break;
-	    case DIFFERENCE:
-	      if (event.isSubject) {
-	        isIn = thisIn && !thatIn;
-	      } else {
-	        isIn = thatIn && !thisIn;
+	        removeVertexIds.push(vertexId);
+	        keepGoing = true;
 	      }
-	      break;
-	  }
-	  return isIn ? +1 : -1;
-	}
 
-	var SweepEvent = function SweepEvent (point, left, otherEvent, isSubject, edgeType) {
+	      if (parents.length < 1) {
+	        // vertex is no longer attached to anything
+	        vgraph = vgraph.remove(vertex);
+	      }
+	    }
+	  } while (keepGoing);
 
-	  /**
-	   * Is left endpoint?
-	   * @type {Boolean}
-	   */
-	  this.left = left;
+	  vertices = vertices.filter(function (vertex) {
+	    return removeVertexIds.indexOf(vertex.id) === -1;
+	  }).map(function (vertex) {
+	    return vgraph.entity(vertex.id);
+	  });
+	  ways = ways.filter(function (way) {
+	    return removeWayIds.indexOf(way.id) === -1;
+	  }).map(function (way) {
+	    return vgraph.entity(way.id);
+	  }); // OK!  Here is our intersection..
+
+	  var intersection = {
+	    graph: vgraph,
+	    actions: actions,
+	    vertices: vertices,
+	    ways: ways
+	  }; // Get all the valid turns through this intersection given a starting way id.
+	  // This operates on the virtual graph for everything.
+	  //
+	  // Basically, walk through all possible paths from starting way,
+	  //   honoring the existing turn restrictions as we go (watch out for loops!)
+	  //
+	  // For each path found, generate and return a `osmTurn` datastructure.
+	  //
 
-	  /**
-	   * @type {Array.<Number>}
-	   */
-	  this.point = point;
+	  intersection.turns = function (fromWayId, maxViaWay) {
+	    if (!fromWayId) return [];
+	    if (!maxViaWay) maxViaWay = 0;
+	    var vgraph = intersection.graph;
+	    var keyVertexIds = intersection.vertices.map(function (v) {
+	      return v.id;
+	    });
+	    var start = vgraph.entity(fromWayId);
+	    if (!start || !(start.__from || start.__via)) return []; // maxViaWay=0   from-*-to              (0 vias)
+	    // maxViaWay=1   from-*-via-*-to        (1 via max)
+	    // maxViaWay=2   from-*-via-*-via-*-to  (2 vias max)
 
-	  /**
-	   * Other edge reference
-	   * @type {SweepEvent}
-	   */
-	  this.otherEvent = otherEvent;
+	    var maxPathLength = maxViaWay * 2 + 3;
+	    var turns = [];
+	    step(start);
+	    return turns; // traverse the intersection graph and find all the valid paths
 
-	  /**
-	   * Belongs to source or clipping polygon
-	   * @type {Boolean}
-	   */
-	  this.isSubject = isSubject;
+	    function step(entity, currPath, currRestrictions, matchedRestriction) {
+	      currPath = (currPath || []).slice(); // shallow copy
 
-	  /**
-	   * Edge contribution type
-	   * @type {Number}
-	   */
-	  this.type = edgeType || NORMAL;
+	      if (currPath.length >= maxPathLength) return;
+	      currPath.push(entity.id);
+	      currRestrictions = (currRestrictions || []).slice(); // shallow copy
 
+	      var i, j;
 
-	  /**
-	   * In-out transition for the sweepline crossing polygon
-	   * @type {Boolean}
-	   */
-	  this.inOut = false;
+	      if (entity.type === 'node') {
+	        var parents = vgraph.parentWays(entity);
+	        var nextWays = []; // which ways can we step into?
 
+	        for (i = 0; i < parents.length; i++) {
+	          var way = parents[i]; // if next way is a oneway incoming to this vertex, skip
 
-	  /**
-	   * @type {Boolean}
-	   */
-	  this.otherInOut = false;
+	          if (way.__oneWay && way.nodes[0] !== entity.id) continue; // if we have seen it before (allowing for an initial u-turn), skip
 
-	  /**
-	   * Previous event in result?
-	   * @type {SweepEvent}
-	   */
-	  this.prevInResult = null;
+	          if (currPath.indexOf(way.id) !== -1 && currPath.length >= 3) continue; // Check all "current" restrictions (where we've already walked the `FROM`)
 
-	  /**
-	   * Type of result transition (0 = not in result, +1 = out-in, -1, in-out)
-	   * @type {Number}
-	   */
-	  this.resultTransition = 0;
+	          var restrict = null;
 
-	  // connection step
+	          for (j = 0; j < currRestrictions.length; j++) {
+	            var restriction = currRestrictions[j];
+	            var f = restriction.memberByRole('from');
+	            var v = restriction.membersByRole('via');
+	            var t = restriction.memberByRole('to');
+	            var isOnly = /^only_/.test(restriction.tags.restriction); // Does the current path match this turn restriction?
 
-	  /**
-	   * @type {Number}
-	   */
-	  this.otherPos = -1;
+	            var matchesFrom = f.id === fromWayId;
+	            var matchesViaTo = false;
+	            var isAlongOnlyPath = false;
 
-	  /**
-	   * @type {Number}
-	   */
-	  this.outputContourId = -1;
+	            if (t.id === way.id) {
+	              // match TO
+	              if (v.length === 1 && v[0].type === 'node') {
+	                // match VIA node
+	                matchesViaTo = v[0].id === entity.id && (matchesFrom && currPath.length === 2 || !matchesFrom && currPath.length > 2);
+	              } else {
+	                // match all VIA ways
+	                var pathVias = [];
 
-	  this.isExteriorRing = true; // TODO: Looks unused, remove?
-	};
+	                for (k = 2; k < currPath.length; k += 2) {
+	                  // k = 2 skips FROM
+	                  pathVias.push(currPath[k]); // (path goes way-node-way...)
+	                }
 
-	var prototypeAccessors$1 = { inResult: { configurable: true } };
+	                var restrictionVias = [];
 
+	                for (k = 0; k < v.length; k++) {
+	                  if (v[k].type === 'way') {
+	                    restrictionVias.push(v[k].id);
+	                  }
+	                }
 
-	/**
-	 * @param{Array.<Number>}p
-	 * @return {Boolean}
-	 */
-	SweepEvent.prototype.isBelow = function isBelow (p) {
-	  var p0 = this.point, p1 = this.otherEvent.point;
-	  return this.left
-	    ? (p0[0] - p[0]) * (p1[1] - p[1]) - (p1[0] - p[0]) * (p0[1] - p[1]) > 0
-	    // signedArea(this.point, this.otherEvent.point, p) > 0 :
-	    : (p1[0] - p[0]) * (p0[1] - p[1]) - (p0[0] - p[0]) * (p1[1] - p[1]) > 0;
-	    //signedArea(this.otherEvent.point, this.point, p) > 0;
-	};
+	                var diff = utilArrayDifference(pathVias, restrictionVias);
+	                matchesViaTo = !diff.length;
+	              }
+	            } else if (isOnly) {
+	              for (k = 0; k < v.length; k++) {
+	                // way doesn't match TO, but is one of the via ways along the path of an "only"
+	                if (v[k].type === 'way' && v[k].id === way.id) {
+	                  isAlongOnlyPath = true;
+	                  break;
+	                }
+	              }
+	            }
 
+	            if (matchesViaTo) {
+	              if (isOnly) {
+	                restrict = {
+	                  id: restriction.id,
+	                  direct: matchesFrom,
+	                  from: f.id,
+	                  only: true,
+	                  end: true
+	                };
+	              } else {
+	                restrict = {
+	                  id: restriction.id,
+	                  direct: matchesFrom,
+	                  from: f.id,
+	                  no: true,
+	                  end: true
+	                };
+	              }
+	            } else {
+	              // indirect - caused by a different nearby restriction
+	              if (isAlongOnlyPath) {
+	                restrict = {
+	                  id: restriction.id,
+	                  direct: false,
+	                  from: f.id,
+	                  only: true,
+	                  end: false
+	                };
+	              } else if (isOnly) {
+	                restrict = {
+	                  id: restriction.id,
+	                  direct: false,
+	                  from: f.id,
+	                  no: true,
+	                  end: true
+	                };
+	              }
+	            } // stop looking if we find a "direct" restriction (matching FROM, VIA, TO)
 
-	/**
-	 * @param{Array.<Number>}p
-	 * @return {Boolean}
-	 */
-	SweepEvent.prototype.isAbove = function isAbove (p) {
-	  return !this.isBelow(p);
-	};
 
+	            if (restrict && restrict.direct) break;
+	          }
 
-	/**
-	 * @return {Boolean}
-	 */
-	SweepEvent.prototype.isVertical = function isVertical () {
-	  return this.point[0] === this.otherEvent.point[0];
-	};
+	          nextWays.push({
+	            way: way,
+	            restrict: restrict
+	          });
+	        }
 
+	        nextWays.forEach(function (nextWay) {
+	          step(nextWay.way, currPath, currRestrictions, nextWay.restrict);
+	        });
+	      } else {
+	        // entity.type === 'way'
+	        if (currPath.length >= 3) {
+	          // this is a "complete" path..
+	          var turnPath = currPath.slice(); // shallow copy
+	          // an indirect restriction - only include the partial path (starting at FROM)
+
+	          if (matchedRestriction && matchedRestriction.direct === false) {
+	            for (i = 0; i < turnPath.length; i++) {
+	              if (turnPath[i] === matchedRestriction.from) {
+	                turnPath = turnPath.slice(i);
+	                break;
+	              }
+	            }
+	          }
 
-	/**
-	 * Does event belong to result?
-	 * @return {Boolean}
-	 */
-	prototypeAccessors$1.inResult.get = function () {
-	  return this.resultTransition !== 0;
-	};
+	          var turn = pathToTurn(turnPath);
 
+	          if (turn) {
+	            if (matchedRestriction) {
+	              turn.restrictionID = matchedRestriction.id;
+	              turn.no = matchedRestriction.no;
+	              turn.only = matchedRestriction.only;
+	              turn.direct = matchedRestriction.direct;
+	            }
 
-	SweepEvent.prototype.clone = function clone () {
-	  var copy = new SweepEvent(
-	    this.point, this.left, this.otherEvent, this.isSubject, this.type);
+	            turns.push(osmTurn(turn));
+	          }
 
-	  copy.contourId      = this.contourId;
-	  copy.resultTransition = this.resultTransition;
-	  copy.prevInResult   = this.prevInResult;
-	  copy.isExteriorRing = this.isExteriorRing;
-	  copy.inOut          = this.inOut;
-	  copy.otherInOut     = this.otherInOut;
+	          if (currPath[0] === currPath[2]) return; // if we made a u-turn - stop here
+	        }
 
-	  return copy;
-	};
+	        if (matchedRestriction && matchedRestriction.end) return; // don't advance any further
+	        // which nodes can we step into?
 
-	Object.defineProperties( SweepEvent.prototype, prototypeAccessors$1 );
+	        var n1 = vgraph.entity(entity.first());
+	        var n2 = vgraph.entity(entity.last());
+	        var dist = geoSphericalDistance(n1.loc, n2.loc);
+	        var nextNodes = [];
 
-	function equals(p1, p2) {
-	  if (p1[0] === p2[0]) {
-	    if (p1[1] === p2[1]) {
-	      return true;
-	    } else {
-	      return false;
-	    }
-	  }
-	  return false;
-	}
+	        if (currPath.length > 1) {
+	          if (dist > maxDistance) return; // the next node is too far
 
-	// const EPSILON = 1e-9;
-	// const abs = Math.abs;
-	// TODO https://github.com/w8r/martinez/issues/6#issuecomment-262847164
-	// Precision problem.
-	//
-	// module.exports = function equals(p1, p2) {
-	//   return abs(p1[0] - p2[0]) <= EPSILON && abs(p1[1] - p2[1]) <= EPSILON;
-	// };
+	          if (!entity.__via) return; // this way is a leaf / can't be a via
+	        }
 
-	var epsilon$1 = 1.1102230246251565e-16;
-	var splitter = 134217729;
-	var resulterrbound = (3 + 8 * epsilon$1) * epsilon$1;
-
-	// fast_expansion_sum_zeroelim routine from oritinal code
-	function sum$1(elen, e, flen, f, h) {
-	    var Q, Qnew, hh, bvirt;
-	    var enow = e[0];
-	    var fnow = f[0];
-	    var eindex = 0;
-	    var findex = 0;
-	    if ((fnow > enow) === (fnow > -enow)) {
-	        Q = enow;
-	        enow = e[++eindex];
-	    } else {
-	        Q = fnow;
-	        fnow = f[++findex];
-	    }
-	    var hindex = 0;
-	    if (eindex < elen && findex < flen) {
-	        if ((fnow > enow) === (fnow > -enow)) {
-	            Qnew = enow + Q;
-	            hh = Q - (Qnew - enow);
-	            enow = e[++eindex];
-	        } else {
-	            Qnew = fnow + Q;
-	            hh = Q - (Qnew - fnow);
-	            fnow = f[++findex];
-	        }
-	        Q = Qnew;
-	        if (hh !== 0) {
-	            h[hindex++] = hh;
-	        }
-	        while (eindex < elen && findex < flen) {
-	            if ((fnow > enow) === (fnow > -enow)) {
-	                Qnew = Q + enow;
-	                bvirt = Qnew - Q;
-	                hh = Q - (Qnew - bvirt) + (enow - bvirt);
-	                enow = e[++eindex];
+	        if (!entity.__oneWay && // bidirectional..
+	        keyVertexIds.indexOf(n1.id) !== -1 && // key vertex..
+	        currPath.indexOf(n1.id) === -1) {
+	          // haven't seen it yet..
+	          nextNodes.push(n1); // can advance to first node
+	        }
+
+	        if (keyVertexIds.indexOf(n2.id) !== -1 && // key vertex..
+	        currPath.indexOf(n2.id) === -1) {
+	          // haven't seen it yet..
+	          nextNodes.push(n2); // can advance to last node
+	        }
+
+	        nextNodes.forEach(function (nextNode) {
+	          // gather restrictions FROM this way
+	          var fromRestrictions = vgraph.parentRelations(entity).filter(function (r) {
+	            if (!r.isRestriction()) return false;
+	            var f = r.memberByRole('from');
+	            if (!f || f.id !== entity.id) return false;
+	            var isOnly = /^only_/.test(r.tags.restriction);
+	            if (!isOnly) return true; // `only_` restrictions only matter along the direction of the VIA - #4849
+
+	            var isOnlyVia = false;
+	            var v = r.membersByRole('via');
+
+	            if (v.length === 1 && v[0].type === 'node') {
+	              // via node
+	              isOnlyVia = v[0].id === nextNode.id;
 	            } else {
-	                Qnew = Q + fnow;
-	                bvirt = Qnew - Q;
-	                hh = Q - (Qnew - bvirt) + (fnow - bvirt);
-	                fnow = f[++findex];
-	            }
-	            Q = Qnew;
-	            if (hh !== 0) {
-	                h[hindex++] = hh;
+	              // via way(s)
+	              for (var i = 0; i < v.length; i++) {
+	                if (v[i].type !== 'way') continue;
+	                var viaWay = vgraph.entity(v[i].id);
+
+	                if (viaWay.first() === nextNode.id || viaWay.last() === nextNode.id) {
+	                  isOnlyVia = true;
+	                  break;
+	                }
+	              }
 	            }
+
+	            return isOnlyVia;
+	          });
+	          step(nextNode, currPath, currRestrictions.concat(fromRestrictions), false);
+	        });
+	      }
+	    } // assumes path is alternating way-node-way of odd length
+
+
+	    function pathToTurn(path) {
+	      if (path.length < 3) return;
+	      var fromWayId, fromNodeId, fromVertexId;
+	      var toWayId, toNodeId, toVertexId;
+	      var viaWayIds, viaNodeId, isUturn;
+	      fromWayId = path[0];
+	      toWayId = path[path.length - 1];
+
+	      if (path.length === 3 && fromWayId === toWayId) {
+	        // u turn
+	        var way = vgraph.entity(fromWayId);
+	        if (way.__oneWay) return null;
+	        isUturn = true;
+	        viaNodeId = fromVertexId = toVertexId = path[1];
+	        fromNodeId = toNodeId = adjacentNode(fromWayId, viaNodeId);
+	      } else {
+	        isUturn = false;
+	        fromVertexId = path[1];
+	        fromNodeId = adjacentNode(fromWayId, fromVertexId);
+	        toVertexId = path[path.length - 2];
+	        toNodeId = adjacentNode(toWayId, toVertexId);
+
+	        if (path.length === 3) {
+	          viaNodeId = path[1];
+	        } else {
+	          viaWayIds = path.filter(function (entityId) {
+	            return entityId[0] === 'w';
+	          });
+	          viaWayIds = viaWayIds.slice(1, viaWayIds.length - 1); // remove first, last
 	        }
+	      }
+
+	      return {
+	        key: path.join('_'),
+	        path: path,
+	        from: {
+	          node: fromNodeId,
+	          way: fromWayId,
+	          vertex: fromVertexId
+	        },
+	        via: {
+	          node: viaNodeId,
+	          ways: viaWayIds
+	        },
+	        to: {
+	          node: toNodeId,
+	          way: toWayId,
+	          vertex: toVertexId
+	        },
+	        u: isUturn
+	      };
+
+	      function adjacentNode(wayId, affixId) {
+	        var nodes = vgraph.entity(wayId).nodes;
+	        return affixId === nodes[0] ? nodes[1] : nodes[nodes.length - 2];
+	      }
 	    }
-	    while (eindex < elen) {
-	        Qnew = Q + enow;
-	        bvirt = Qnew - Q;
-	        hh = Q - (Qnew - bvirt) + (enow - bvirt);
-	        enow = e[++eindex];
-	        Q = Qnew;
-	        if (hh !== 0) {
-	            h[hindex++] = hh;
-	        }
-	    }
-	    while (findex < flen) {
-	        Qnew = Q + fnow;
-	        bvirt = Qnew - Q;
-	        hh = Q - (Qnew - bvirt) + (fnow - bvirt);
-	        fnow = f[++findex];
-	        Q = Qnew;
-	        if (hh !== 0) {
-	            h[hindex++] = hh;
-	        }
-	    }
-	    if (Q !== 0 || hindex === 0) {
-	        h[hindex++] = Q;
-	    }
-	    return hindex;
-	}
-
-	function estimate(elen, e) {
-	    var Q = e[0];
-	    for (var i = 1; i < elen; i++) { Q += e[i]; }
-	    return Q;
-	}
-
-	function vec(n) {
-	    return new Float64Array(n);
-	}
-
-	var ccwerrboundA = (3 + 16 * epsilon$1) * epsilon$1;
-	var ccwerrboundB = (2 + 12 * epsilon$1) * epsilon$1;
-	var ccwerrboundC = (9 + 64 * epsilon$1) * epsilon$1 * epsilon$1;
-
-	var B = vec(4);
-	var C1 = vec(8);
-	var C2 = vec(12);
-	var D = vec(16);
-	var u = vec(4);
-
-	function orient2dadapt(ax, ay, bx, by, cx, cy, detsum) {
-	    var acxtail, acytail, bcxtail, bcytail;
-	    var bvirt, c, ahi, alo, bhi, blo, _i, _j, _0, s1, s0, t1, t0, u3;
-
-	    var acx = ax - cx;
-	    var bcx = bx - cx;
-	    var acy = ay - cy;
-	    var bcy = by - cy;
-
-	    s1 = acx * bcy;
-	    c = splitter * acx;
-	    ahi = c - (c - acx);
-	    alo = acx - ahi;
-	    c = splitter * bcy;
-	    bhi = c - (c - bcy);
-	    blo = bcy - bhi;
-	    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
-	    t1 = acy * bcx;
-	    c = splitter * acy;
-	    ahi = c - (c - acy);
-	    alo = acy - ahi;
-	    c = splitter * bcx;
-	    bhi = c - (c - bcx);
-	    blo = bcx - bhi;
-	    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
-	    _i = s0 - t0;
-	    bvirt = s0 - _i;
-	    B[0] = s0 - (_i + bvirt) + (bvirt - t0);
-	    _j = s1 + _i;
-	    bvirt = _j - s1;
-	    _0 = s1 - (_j - bvirt) + (_i - bvirt);
-	    _i = _0 - t1;
-	    bvirt = _0 - _i;
-	    B[1] = _0 - (_i + bvirt) + (bvirt - t1);
-	    u3 = _j + _i;
-	    bvirt = u3 - _j;
-	    B[2] = _j - (u3 - bvirt) + (_i - bvirt);
-	    B[3] = u3;
-
-	    var det = estimate(4, B);
-	    var errbound = ccwerrboundB * detsum;
-	    if (det >= errbound || -det >= errbound) {
-	        return det;
-	    }
-
-	    bvirt = ax - acx;
-	    acxtail = ax - (acx + bvirt) + (bvirt - cx);
-	    bvirt = bx - bcx;
-	    bcxtail = bx - (bcx + bvirt) + (bvirt - cx);
-	    bvirt = ay - acy;
-	    acytail = ay - (acy + bvirt) + (bvirt - cy);
-	    bvirt = by - bcy;
-	    bcytail = by - (bcy + bvirt) + (bvirt - cy);
-
-	    if (acxtail === 0 && acytail === 0 && bcxtail === 0 && bcytail === 0) {
-	        return det;
-	    }
-
-	    errbound = ccwerrboundC * detsum + resulterrbound * Math.abs(det);
-	    det += (acx * bcytail + bcy * acxtail) - (acy * bcxtail + bcx * acytail);
-	    if (det >= errbound || -det >= errbound) { return det; }
-
-	    s1 = acxtail * bcy;
-	    c = splitter * acxtail;
-	    ahi = c - (c - acxtail);
-	    alo = acxtail - ahi;
-	    c = splitter * bcy;
-	    bhi = c - (c - bcy);
-	    blo = bcy - bhi;
-	    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
-	    t1 = acytail * bcx;
-	    c = splitter * acytail;
-	    ahi = c - (c - acytail);
-	    alo = acytail - ahi;
-	    c = splitter * bcx;
-	    bhi = c - (c - bcx);
-	    blo = bcx - bhi;
-	    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
-	    _i = s0 - t0;
-	    bvirt = s0 - _i;
-	    u[0] = s0 - (_i + bvirt) + (bvirt - t0);
-	    _j = s1 + _i;
-	    bvirt = _j - s1;
-	    _0 = s1 - (_j - bvirt) + (_i - bvirt);
-	    _i = _0 - t1;
-	    bvirt = _0 - _i;
-	    u[1] = _0 - (_i + bvirt) + (bvirt - t1);
-	    u3 = _j + _i;
-	    bvirt = u3 - _j;
-	    u[2] = _j - (u3 - bvirt) + (_i - bvirt);
-	    u[3] = u3;
-	    var C1len = sum$1(4, B, 4, u, C1);
-
-	    s1 = acx * bcytail;
-	    c = splitter * acx;
-	    ahi = c - (c - acx);
-	    alo = acx - ahi;
-	    c = splitter * bcytail;
-	    bhi = c - (c - bcytail);
-	    blo = bcytail - bhi;
-	    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
-	    t1 = acy * bcxtail;
-	    c = splitter * acy;
-	    ahi = c - (c - acy);
-	    alo = acy - ahi;
-	    c = splitter * bcxtail;
-	    bhi = c - (c - bcxtail);
-	    blo = bcxtail - bhi;
-	    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
-	    _i = s0 - t0;
-	    bvirt = s0 - _i;
-	    u[0] = s0 - (_i + bvirt) + (bvirt - t0);
-	    _j = s1 + _i;
-	    bvirt = _j - s1;
-	    _0 = s1 - (_j - bvirt) + (_i - bvirt);
-	    _i = _0 - t1;
-	    bvirt = _0 - _i;
-	    u[1] = _0 - (_i + bvirt) + (bvirt - t1);
-	    u3 = _j + _i;
-	    bvirt = u3 - _j;
-	    u[2] = _j - (u3 - bvirt) + (_i - bvirt);
-	    u[3] = u3;
-	    var C2len = sum$1(C1len, C1, 4, u, C2);
-
-	    s1 = acxtail * bcytail;
-	    c = splitter * acxtail;
-	    ahi = c - (c - acxtail);
-	    alo = acxtail - ahi;
-	    c = splitter * bcytail;
-	    bhi = c - (c - bcytail);
-	    blo = bcytail - bhi;
-	    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
-	    t1 = acytail * bcxtail;
-	    c = splitter * acytail;
-	    ahi = c - (c - acytail);
-	    alo = acytail - ahi;
-	    c = splitter * bcxtail;
-	    bhi = c - (c - bcxtail);
-	    blo = bcxtail - bhi;
-	    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
-	    _i = s0 - t0;
-	    bvirt = s0 - _i;
-	    u[0] = s0 - (_i + bvirt) + (bvirt - t0);
-	    _j = s1 + _i;
-	    bvirt = _j - s1;
-	    _0 = s1 - (_j - bvirt) + (_i - bvirt);
-	    _i = _0 - t1;
-	    bvirt = _0 - _i;
-	    u[1] = _0 - (_i + bvirt) + (bvirt - t1);
-	    u3 = _j + _i;
-	    bvirt = u3 - _j;
-	    u[2] = _j - (u3 - bvirt) + (_i - bvirt);
-	    u[3] = u3;
-	    var Dlen = sum$1(C2len, C2, 4, u, D);
-
-	    return D[Dlen - 1];
-	}
-
-	function orient2d(ax, ay, bx, by, cx, cy) {
-	    var detleft = (ay - cy) * (bx - cx);
-	    var detright = (ax - cx) * (by - cy);
-	    var det = detleft - detright;
-
-	    if (detleft === 0 || detright === 0 || (detleft > 0) !== (detright > 0)) { return det; }
-
-	    var detsum = Math.abs(detleft + detright);
-	    if (Math.abs(det) >= ccwerrboundA * detsum) { return det; }
-
-	    return -orient2dadapt(ax, ay, bx, by, cx, cy, detsum);
-	}
+	  };
 
-	/**
-	 * Signed area of the triangle (p0, p1, p2)
-	 * @param  {Array.<Number>} p0
-	 * @param  {Array.<Number>} p1
-	 * @param  {Array.<Number>} p2
-	 * @return {Number}
-	 */
-	function signedArea(p0, p1, p2) {
-	  var res = orient2d(p0[0], p0[1], p1[0], p1[1], p2[0], p2[1]);
-	  if (res > 0) { return -1; }
-	  if (res < 0) { return 1; }
-	  return 0;
+	  return intersection;
 	}
+	function osmInferRestriction(graph, turn, projection) {
+	  var fromWay = graph.entity(turn.from.way);
+	  var fromNode = graph.entity(turn.from.node);
+	  var fromVertex = graph.entity(turn.from.vertex);
+	  var toWay = graph.entity(turn.to.way);
+	  var toNode = graph.entity(turn.to.node);
+	  var toVertex = graph.entity(turn.to.vertex);
+	  var fromOneWay = fromWay.tags.oneway === 'yes';
+	  var toOneWay = toWay.tags.oneway === 'yes';
+	  var angle = (geoAngle(fromVertex, fromNode, projection) - geoAngle(toVertex, toNode, projection)) * 180 / Math.PI;
 
-	/**
-	 * @param  {SweepEvent} e1
-	 * @param  {SweepEvent} e2
-	 * @return {Number}
-	 */
-	function compareEvents(e1, e2) {
-	  var p1 = e1.point;
-	  var p2 = e2.point;
-
-	  // Different x-coordinate
-	  if (p1[0] > p2[0]) { return 1; }
-	  if (p1[0] < p2[0]) { return -1; }
+	  while (angle < 0) {
+	    angle += 360;
+	  }
 
-	  // Different points, but same x-coordinate
-	  // Event with lower y-coordinate is processed first
-	  if (p1[1] !== p2[1]) { return p1[1] > p2[1] ? 1 : -1; }
+	  if (fromNode === toNode) {
+	    return 'no_u_turn';
+	  }
 
-	  return specialCases(e1, e2, p1);
-	}
+	  if ((angle < 23 || angle > 336) && fromOneWay && toOneWay) {
+	    return 'no_u_turn'; // wider tolerance for u-turn if both ways are oneway
+	  }
 
+	  if ((angle < 40 || angle > 319) && fromOneWay && toOneWay && turn.from.vertex !== turn.to.vertex) {
+	    return 'no_u_turn'; // even wider tolerance for u-turn if there is a via way (from !== to)
+	  }
 
-	/* eslint-disable no-unused-vars */
-	function specialCases(e1, e2, p1, p2) {
-	  // Same coordinates, but one is a left endpoint and the other is
-	  // a right endpoint. The right endpoint is processed first
-	  if (e1.left !== e2.left)
-	    { return e1.left ? 1 : -1; }
+	  if (angle < 158) {
+	    return 'no_right_turn';
+	  }
 
-	  // const p2 = e1.otherEvent.point, p3 = e2.otherEvent.point;
-	  // const sa = (p1[0] - p3[0]) * (p2[1] - p3[1]) - (p2[0] - p3[0]) * (p1[1] - p3[1])
-	  // Same coordinates, both events
-	  // are left endpoints or right endpoints.
-	  // not collinear
-	  if (signedArea(p1, e1.otherEvent.point, e2.otherEvent.point) !== 0) {
-	    // the event associate to the bottom segment is processed first
-	    return (!e1.isBelow(e2.otherEvent.point)) ? 1 : -1;
+	  if (angle > 202) {
+	    return 'no_left_turn';
 	  }
 
-	  return (!e1.isSubject && e2.isSubject) ? 1 : -1;
+	  return 'no_straight_on';
 	}
-	/* eslint-enable no-unused-vars */
 
-	/**
-	 * @param  {SweepEvent} se
-	 * @param  {Array.<Number>} p
-	 * @param  {Queue} queue
-	 * @return {Queue}
-	 */
-	function divideSegment(se, p, queue)  {
-	  var r = new SweepEvent(p, false, se,            se.isSubject);
-	  var l = new SweepEvent(p, true,  se.otherEvent, se.isSubject);
-
-	  /* eslint-disable no-console */
-	  if (equals(se.point, se.otherEvent.point)) {
-	    console.warn('what is that, a collapsed segment?', se);
+	function actionMergePolygon(ids, newRelationId) {
+	  function groupEntities(graph) {
+	    var entities = ids.map(function (id) {
+	      return graph.entity(id);
+	    });
+	    var geometryGroups = utilArrayGroupBy(entities, function (entity) {
+	      if (entity.type === 'way' && entity.isClosed()) {
+	        return 'closedWay';
+	      } else if (entity.type === 'relation' && entity.isMultipolygon()) {
+	        return 'multipolygon';
+	      } else {
+	        return 'other';
+	      }
+	    });
+	    return Object.assign({
+	      closedWay: [],
+	      multipolygon: [],
+	      other: []
+	    }, geometryGroups);
 	  }
-	  /* eslint-enable no-console */
 
-	  r.contourId = l.contourId = se.contourId;
+	  var action = function action(graph) {
+	    var entities = groupEntities(graph); // An array representing all the polygons that are part of the multipolygon.
+	    //
+	    // Each element is itself an array of objects with an id property, and has a
+	    // locs property which is an array of the locations forming the polygon.
+
+	    var polygons = entities.multipolygon.reduce(function (polygons, m) {
+	      return polygons.concat(osmJoinWays(m.members, graph));
+	    }, []).concat(entities.closedWay.map(function (d) {
+	      var member = [{
+	        id: d.id
+	      }];
+	      member.nodes = graph.childNodes(d);
+	      return member;
+	    })); // contained is an array of arrays of boolean values,
+	    // where contained[j][k] is true iff the jth way is
+	    // contained by the kth way.
+
+	    var contained = polygons.map(function (w, i) {
+	      return polygons.map(function (d, n) {
+	        if (i === n) return null;
+	        return geoPolygonContainsPolygon(d.nodes.map(function (n) {
+	          return n.loc;
+	        }), w.nodes.map(function (n) {
+	          return n.loc;
+	        }));
+	      });
+	    }); // Sort all polygons as either outer or inner ways
 
-	  // avoid a rounding error. The left event would be processed after the right event
-	  if (compareEvents(l, se.otherEvent) > 0) {
-	    se.otherEvent.left = true;
-	    l.left = false;
-	  }
+	    var members = [];
+	    var outer = true;
 
-	  // avoid a rounding error. The left event would be processed after the right event
-	  // if (compareEvents(se, r) > 0) {}
+	    while (polygons.length) {
+	      extractUncontained(polygons);
+	      polygons = polygons.filter(isContained);
+	      contained = contained.filter(isContained).map(filterContained);
+	    }
 
-	  se.otherEvent.otherEvent = l;
-	  se.otherEvent = r;
+	    function isContained(d, i) {
+	      return contained[i].some(function (val) {
+	        return val;
+	      });
+	    }
 
-	  queue.push(l);
-	  queue.push(r);
+	    function filterContained(d) {
+	      return d.filter(isContained);
+	    }
 
-	  return queue;
-	}
+	    function extractUncontained(polygons) {
+	      polygons.forEach(function (d, i) {
+	        if (!isContained(d, i)) {
+	          d.forEach(function (member) {
+	            members.push({
+	              type: 'way',
+	              id: member.id,
+	              role: outer ? 'outer' : 'inner'
+	            });
+	          });
+	        }
+	      });
+	      outer = !outer;
+	    } // Move all tags to one relation
 
-	//const EPS = 1e-9;
 
-	/**
-	 * Finds the magnitude of the cross product of two vectors (if we pretend
-	 * they're in three dimensions)
-	 *
-	 * @param {Object} a First vector
-	 * @param {Object} b Second vector
-	 * @private
-	 * @returns {Number} The magnitude of the cross product
-	 */
-	function crossProduct(a, b) {
-	  return (a[0] * b[1]) - (a[1] * b[0]);
-	}
+	    var relation = entities.multipolygon[0] || osmRelation({
+	      id: newRelationId,
+	      tags: {
+	        type: 'multipolygon'
+	      }
+	    });
+	    entities.multipolygon.slice(1).forEach(function (m) {
+	      relation = relation.mergeTags(m.tags);
+	      graph = graph.remove(m);
+	    });
+	    entities.closedWay.forEach(function (way) {
+	      function isThisOuter(m) {
+	        return m.id === way.id && m.role !== 'inner';
+	      }
 
-	/**
-	 * Finds the dot product of two vectors.
-	 *
-	 * @param {Object} a First vector
-	 * @param {Object} b Second vector
-	 * @private
-	 * @returns {Number} The dot product
-	 */
-	function dotProduct(a, b) {
-	  return (a[0] * b[0]) + (a[1] * b[1]);
-	}
+	      if (members.some(isThisOuter)) {
+	        relation = relation.mergeTags(way.tags);
+	        graph = graph.replace(way.update({
+	          tags: {}
+	        }));
+	      }
+	    });
+	    return graph.replace(relation.update({
+	      members: members,
+	      tags: utilObjectOmit(relation.tags, ['area'])
+	    }));
+	  };
 
-	/**
-	 * Finds the intersection (if any) between two line segments a and b, given the
-	 * line segments' end points a1, a2 and b1, b2.
-	 *
-	 * This algorithm is based on Schneider and Eberly.
-	 * http://www.cimec.org.ar/~ncalvo/Schneider_Eberly.pdf
-	 * Page 244.
-	 *
-	 * @param {Array.<Number>} a1 point of first line
-	 * @param {Array.<Number>} a2 point of first line
-	 * @param {Array.<Number>} b1 point of second line
-	 * @param {Array.<Number>} b2 point of second line
-	 * @param {Boolean=}       noEndpointTouch whether to skip single touchpoints
-	 *                                         (meaning connected segments) as
-	 *                                         intersections
-	 * @returns {Array.<Array.<Number>>|Null} If the lines intersect, the point of
-	 * intersection. If they overlap, the two end points of the overlapping segment.
-	 * Otherwise, null.
-	 */
-	function intersection (a1, a2, b1, b2, noEndpointTouch) {
-	  // The algorithm expects our lines in the form P + sd, where P is a point,
-	  // s is on the interval [0, 1], and d is a vector.
-	  // We are passed two points. P can be the first point of each pair. The
-	  // vector, then, could be thought of as the distance (in x and y components)
-	  // from the first point to the second point.
-	  // So first, let's make our vectors:
-	  var va = [a2[0] - a1[0], a2[1] - a1[1]];
-	  var vb = [b2[0] - b1[0], b2[1] - b1[1]];
-	  // We also define a function to convert back to regular point form:
-
-	  /* eslint-disable arrow-body-style */
-
-	  function toPoint(p, s, d) {
-	    return [
-	      p[0] + s * d[0],
-	      p[1] + s * d[1]
-	    ];
-	  }
+	  action.disabled = function (graph) {
+	    var entities = groupEntities(graph);
 
-	  /* eslint-enable arrow-body-style */
-
-	  // The rest is pretty much a straight port of the algorithm.
-	  var e = [b1[0] - a1[0], b1[1] - a1[1]];
-	  var kross    = crossProduct(va, vb);
-	  var sqrKross = kross * kross;
-	  var sqrLenA  = dotProduct(va, va);
-	  //const sqrLenB  = dotProduct(vb, vb);
-
-	  // Check for line intersection. This works because of the properties of the
-	  // cross product -- specifically, two vectors are parallel if and only if the
-	  // cross product is the 0 vector. The full calculation involves relative error
-	  // to account for possible very small line segments. See Schneider & Eberly
-	  // for details.
-	  if (sqrKross > 0/* EPS * sqrLenB * sqLenA */) {
-	    // If they're not parallel, then (because these are line segments) they
-	    // still might not actually intersect. This code checks that the
-	    // intersection point of the lines is actually on both line segments.
-	    var s = crossProduct(e, vb) / kross;
-	    if (s < 0 || s > 1) {
-	      // not on line segment a
-	      return null;
+	    if (entities.other.length > 0 || entities.closedWay.length + entities.multipolygon.length < 2) {
+	      return 'not_eligible';
 	    }
-	    var t = crossProduct(e, va) / kross;
-	    if (t < 0 || t > 1) {
-	      // not on line segment b
-	      return null;
-	    }
-	    if (s === 0 || s === 1) {
-	      // on an endpoint of line segment a
-	      return noEndpointTouch ? null : [toPoint(a1, s, va)];
+
+	    if (!entities.multipolygon.every(function (r) {
+	      return r.isComplete(graph);
+	    })) {
+	      return 'incomplete_relation';
 	    }
-	    if (t === 0 || t === 1) {
-	      // on an endpoint of line segment b
-	      return noEndpointTouch ? null : [toPoint(b1, t, vb)];
+
+	    if (!entities.multipolygon.length) {
+	      var sharedMultipolygons = [];
+	      entities.closedWay.forEach(function (way, i) {
+	        if (i === 0) {
+	          sharedMultipolygons = graph.parentMultipolygons(way);
+	        } else {
+	          sharedMultipolygons = utilArrayIntersection(sharedMultipolygons, graph.parentMultipolygons(way));
+	        }
+	      });
+	      sharedMultipolygons = sharedMultipolygons.filter(function (relation) {
+	        return relation.members.length === entities.closedWay.length;
+	      });
+
+	      if (sharedMultipolygons.length) {
+	        // don't create a new multipolygon if it'd be redundant
+	        return 'not_eligible';
+	      }
+	    } else if (entities.closedWay.some(function (way) {
+	      return utilArrayIntersection(graph.parentMultipolygons(way), entities.multipolygon).length;
+	    })) {
+	      // don't add a way to a multipolygon again if it's already a member
+	      return 'not_eligible';
 	    }
-	    return [toPoint(a1, s, va)];
-	  }
+	  };
 
-	  // If we've reached this point, then the lines are either parallel or the
-	  // same, but the segments could overlap partially or fully, or not at all.
-	  // So we need to find the overlap, if any. To do that, we can use e, which is
-	  // the (vector) difference between the two initial points. If this is parallel
-	  // with the line itself, then the two lines are the same line, and there will
-	  // be overlap.
-	  //const sqrLenE = dotProduct(e, e);
-	  kross = crossProduct(e, va);
-	  sqrKross = kross * kross;
+	  return action;
+	}
 
-	  if (sqrKross > 0 /* EPS * sqLenB * sqLenE */) {
-	  // Lines are just parallel, not the same. No overlap.
-	    return null;
-	  }
+	var DESCRIPTORS = descriptors;
+	var objectDefinePropertyModule = objectDefineProperty;
+	var regExpFlags = regexpFlags$1;
+	var fails$4 = fails$N;
+
+	var FORCED$2 = DESCRIPTORS && fails$4(function () {
+	  // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+	  return Object.getOwnPropertyDescriptor(RegExp.prototype, 'flags').get.call({ dotAll: true, sticky: true }) !== 'sy';
+	});
+
+	// `RegExp.prototype.flags` getter
+	// https://tc39.es/ecma262/#sec-get-regexp.prototype.flags
+	if (FORCED$2) objectDefinePropertyModule.f(RegExp.prototype, 'flags', {
+	  configurable: true,
+	  get: regExpFlags
+	});
+
+	var fastDeepEqual = function equal(a, b) {
+	  if (a === b) return true;
+
+	  if (a && b && _typeof(a) == 'object' && _typeof(b) == 'object') {
+	    if (a.constructor !== b.constructor) return false;
+	    var length, i, keys;
+
+	    if (Array.isArray(a)) {
+	      length = a.length;
+	      if (length != b.length) return false;
 
-	  var sa = dotProduct(va, e) / sqrLenA;
-	  var sb = sa + dotProduct(va, vb) / sqrLenA;
-	  var smin = Math.min(sa, sb);
-	  var smax = Math.max(sa, sb);
+	      for (i = length; i-- !== 0;) {
+	        if (!equal(a[i], b[i])) return false;
+	      }
+
+	      return true;
+	    }
 
-	  // this is, essentially, the FindIntersection acting on floats from
-	  // Schneider & Eberly, just inlined into this function.
-	  if (smin <= 1 && smax >= 0) {
+	    if (a.constructor === RegExp) return a.source === b.source && a.flags === b.flags;
+	    if (a.valueOf !== Object.prototype.valueOf) return a.valueOf() === b.valueOf();
+	    if (a.toString !== Object.prototype.toString) return a.toString() === b.toString();
+	    keys = Object.keys(a);
+	    length = keys.length;
+	    if (length !== Object.keys(b).length) return false;
 
-	    // overlap on an end point
-	    if (smin === 1) {
-	      return noEndpointTouch ? null : [toPoint(a1, smin > 0 ? smin : 0, va)];
+	    for (i = length; i-- !== 0;) {
+	      if (!Object.prototype.hasOwnProperty.call(b, keys[i])) return false;
 	    }
 
-	    if (smax === 0) {
-	      return noEndpointTouch ? null : [toPoint(a1, smax < 1 ? smax : 1, va)];
+	    for (i = length; i-- !== 0;) {
+	      var key = keys[i];
+	      if (!equal(a[key], b[key])) return false;
 	    }
 
-	    if (noEndpointTouch && smin === 0 && smax === 1) { return null; }
+	    return true;
+	  } // true if both NaN, false otherwise
 
-	    // There's overlap on a segment -- two points of intersection. Return both.
-	    return [
-	      toPoint(a1, smin > 0 ? smin : 0, va),
-	      toPoint(a1, smax < 1 ? smax : 1, va)
-	    ];
-	  }
 
-	  return null;
-	}
+	  return a !== a && b !== b;
+	};
 
-	/**
-	 * @param  {SweepEvent} se1
-	 * @param  {SweepEvent} se2
-	 * @param  {Queue}      queue
-	 * @return {Number}
-	 */
-	function possibleIntersection (se1, se2, queue) {
-	  // that disallows self-intersecting polygons,
-	  // did cost us half a day, so I'll leave it
-	  // out of respect
-	  // if (se1.isSubject === se2.isSubject) return;
-	  var inter = intersection(
-	    se1.point, se1.otherEvent.point,
-	    se2.point, se2.otherEvent.point
-	  );
+	// J. W. Hunt and M. D. McIlroy, An algorithm for differential buffer
+	// comparison, Bell Telephone Laboratories CSTR #41 (1976)
+	// http://www.cs.dartmouth.edu/~doug/
+	// https://en.wikipedia.org/wiki/Longest_common_subsequence_problem
+	//
+	// Expects two arrays, finds longest common sequence
 
-	  var nintersections = inter ? inter.length : 0;
-	  if (nintersections === 0) { return 0; } // no intersection
+	function LCS(buffer1, buffer2) {
+	  var equivalenceClasses = {};
 
-	  // the line segments intersect at an endpoint of both line segments
-	  if ((nintersections === 1) &&
-	      (equals(se1.point, se2.point) ||
-	       equals(se1.otherEvent.point, se2.otherEvent.point))) {
-	    return 0;
-	  }
+	  for (var j = 0; j < buffer2.length; j++) {
+	    var item = buffer2[j];
 
-	  if (nintersections === 2 && se1.isSubject === se2.isSubject) {
-	    // if(se1.contourId === se2.contourId){
-	    // console.warn('Edges of the same polygon overlap',
-	    //   se1.point, se1.otherEvent.point, se2.point, se2.otherEvent.point);
-	    // }
-	    //throw new Error('Edges of the same polygon overlap');
-	    return 0;
+	    if (equivalenceClasses[item]) {
+	      equivalenceClasses[item].push(j);
+	    } else {
+	      equivalenceClasses[item] = [j];
+	    }
 	  }
 
-	  // The line segments associated to se1 and se2 intersect
-	  if (nintersections === 1) {
+	  var NULLRESULT = {
+	    buffer1index: -1,
+	    buffer2index: -1,
+	    chain: null
+	  };
+	  var candidates = [NULLRESULT];
+
+	  for (var i = 0; i < buffer1.length; i++) {
+	    var _item = buffer1[i];
+	    var buffer2indices = equivalenceClasses[_item] || [];
+	    var r = 0;
+	    var c = candidates[0];
+
+	    for (var jx = 0; jx < buffer2indices.length; jx++) {
+	      var _j = buffer2indices[jx];
+	      var s = void 0;
+
+	      for (s = r; s < candidates.length; s++) {
+	        if (candidates[s].buffer2index < _j && (s === candidates.length - 1 || candidates[s + 1].buffer2index > _j)) {
+	          break;
+	        }
+	      }
+
+	      if (s < candidates.length) {
+	        var newCandidate = {
+	          buffer1index: i,
+	          buffer2index: _j,
+	          chain: candidates[s]
+	        };
+
+	        if (r === candidates.length) {
+	          candidates.push(c);
+	        } else {
+	          candidates[r] = c;
+	        }
+
+	        r = s + 1;
+	        c = newCandidate;
 
-	    // if the intersection point is not an endpoint of se1
-	    if (!equals(se1.point, inter[0]) && !equals(se1.otherEvent.point, inter[0])) {
-	      divideSegment(se1, inter[0], queue);
+	        if (r === candidates.length) {
+	          break; // no point in examining further (j)s
+	        }
+	      }
 	    }
 
-	    // if the intersection point is not an endpoint of se2
-	    if (!equals(se2.point, inter[0]) && !equals(se2.otherEvent.point, inter[0])) {
-	      divideSegment(se2, inter[0], queue);
+	    candidates[r] = c;
+	  } // At this point, we know the LCS: it's in the reverse of the
+	  // linked-list through .chain of candidates[candidates.length - 1].
+
+
+	  return candidates[candidates.length - 1];
+	} // We apply the LCS to build a 'comm'-style picture of the
+	// offsets and lengths of mismatched chunks in the input
+	// buffers. This is used by diff3MergeRegions.
+
+
+	function diffIndices(buffer1, buffer2) {
+	  var lcs = LCS(buffer1, buffer2);
+	  var result = [];
+	  var tail1 = buffer1.length;
+	  var tail2 = buffer2.length;
+
+	  for (var candidate = lcs; candidate !== null; candidate = candidate.chain) {
+	    var mismatchLength1 = tail1 - candidate.buffer1index - 1;
+	    var mismatchLength2 = tail2 - candidate.buffer2index - 1;
+	    tail1 = candidate.buffer1index;
+	    tail2 = candidate.buffer2index;
+
+	    if (mismatchLength1 || mismatchLength2) {
+	      result.push({
+	        buffer1: [tail1 + 1, mismatchLength1],
+	        buffer1Content: buffer1.slice(tail1 + 1, tail1 + 1 + mismatchLength1),
+	        buffer2: [tail2 + 1, mismatchLength2],
+	        buffer2Content: buffer2.slice(tail2 + 1, tail2 + 1 + mismatchLength2)
+	      });
 	    }
-	    return 1;
 	  }
 
-	  // The line segments associated to se1 and se2 overlap
-	  var events        = [];
-	  var leftCoincide  = false;
-	  var rightCoincide = false;
+	  result.reverse();
+	  return result;
+	} // We apply the LCS to build a JSON representation of a
+	// independently derived from O, returns a fairly complicated
+	// internal representation of merge decisions it's taken. The
+	// interested reader may wish to consult
+	//
+	// Sanjeev Khanna, Keshav Kunal, and Benjamin C. Pierce.
+	// 'A Formal Investigation of ' In Arvind and Prasad,
+	// editors, Foundations of Software Technology and Theoretical
+	// Computer Science (FSTTCS), December 2007.
+	//
+	// (http://www.cis.upenn.edu/~bcpierce/papers/diff3-short.pdf)
+	//
+
 
-	  if (equals(se1.point, se2.point)) {
-	    leftCoincide = true; // linked
-	  } else if (compareEvents(se1, se2) === 1) {
-	    events.push(se2, se1);
-	  } else {
-	    events.push(se1, se2);
+	function diff3MergeRegions(a, o, b) {
+	  // "hunks" are array subsets where `a` or `b` are different from `o`
+	  // https://www.gnu.org/software/diffutils/manual/html_node/diff3-Hunks.html
+	  var hunks = [];
+
+	  function addHunk(h, ab) {
+	    hunks.push({
+	      ab: ab,
+	      oStart: h.buffer1[0],
+	      oLength: h.buffer1[1],
+	      // length of o to remove
+	      abStart: h.buffer2[0],
+	      abLength: h.buffer2[1] // length of a/b to insert
+	      // abContent: (ab === 'a' ? a : b).slice(h.buffer2[0], h.buffer2[0] + h.buffer2[1])
+
+	    });
 	  }
 
-	  if (equals(se1.otherEvent.point, se2.otherEvent.point)) {
-	    rightCoincide = true;
-	  } else if (compareEvents(se1.otherEvent, se2.otherEvent) === 1) {
-	    events.push(se2.otherEvent, se1.otherEvent);
-	  } else {
-	    events.push(se1.otherEvent, se2.otherEvent);
+	  diffIndices(o, a).forEach(function (item) {
+	    return addHunk(item, 'a');
+	  });
+	  diffIndices(o, b).forEach(function (item) {
+	    return addHunk(item, 'b');
+	  });
+	  hunks.sort(function (x, y) {
+	    return x.oStart - y.oStart;
+	  });
+	  var results = [];
+	  var currOffset = 0;
+
+	  function advanceTo(endOffset) {
+	    if (endOffset > currOffset) {
+	      results.push({
+	        stable: true,
+	        buffer: 'o',
+	        bufferStart: currOffset,
+	        bufferLength: endOffset - currOffset,
+	        bufferContent: o.slice(currOffset, endOffset)
+	      });
+	      currOffset = endOffset;
+	    }
 	  }
 
-	  if ((leftCoincide && rightCoincide) || leftCoincide) {
-	    // both line segments are equal or share the left endpoint
-	    se2.type = NON_CONTRIBUTING;
-	    se1.type = (se2.inOut === se1.inOut)
-	      ? SAME_TRANSITION : DIFFERENT_TRANSITION;
+	  while (hunks.length) {
+	    var hunk = hunks.shift();
+	    var regionStart = hunk.oStart;
+	    var regionEnd = hunk.oStart + hunk.oLength;
+	    var regionHunks = [hunk];
+	    advanceTo(regionStart); // Try to pull next overlapping hunk into this region
+
+	    while (hunks.length) {
+	      var nextHunk = hunks[0];
+	      var nextHunkStart = nextHunk.oStart;
+	      if (nextHunkStart > regionEnd) break; // no overlap
+
+	      regionEnd = Math.max(regionEnd, nextHunkStart + nextHunk.oLength);
+	      regionHunks.push(hunks.shift());
+	    }
+
+	    if (regionHunks.length === 1) {
+	      // Only one hunk touches this region, meaning that there is no conflict here.
+	      // Either `a` or `b` is inserting into a region of `o` unchanged by the other.
+	      if (hunk.abLength > 0) {
+	        var buffer = hunk.ab === 'a' ? a : b;
+	        results.push({
+	          stable: true,
+	          buffer: hunk.ab,
+	          bufferStart: hunk.abStart,
+	          bufferLength: hunk.abLength,
+	          bufferContent: buffer.slice(hunk.abStart, hunk.abStart + hunk.abLength)
+	        });
+	      }
+	    } else {
+	      // A true a/b conflict. Determine the bounds involved from `a`, `o`, and `b`.
+	      // Effectively merge all the `a` hunks into one giant hunk, then do the
+	      // same for the `b` hunks; then, correct for skew in the regions of `o`
+	      // that each side changed, and report appropriate spans for the three sides.
+	      var bounds = {
+	        a: [a.length, -1, o.length, -1],
+	        b: [b.length, -1, o.length, -1]
+	      };
+
+	      while (regionHunks.length) {
+	        hunk = regionHunks.shift();
+	        var oStart = hunk.oStart;
+	        var oEnd = oStart + hunk.oLength;
+	        var abStart = hunk.abStart;
+	        var abEnd = abStart + hunk.abLength;
+	        var _b = bounds[hunk.ab];
+	        _b[0] = Math.min(abStart, _b[0]);
+	        _b[1] = Math.max(abEnd, _b[1]);
+	        _b[2] = Math.min(oStart, _b[2]);
+	        _b[3] = Math.max(oEnd, _b[3]);
+	      }
 
-	    if (leftCoincide && !rightCoincide) {
-	      // honestly no idea, but changing events selection from [2, 1]
-	      // to [0, 1] fixes the overlapping self-intersecting polygons issue
-	      divideSegment(events[1].otherEvent, events[0].point, queue);
+	      var aStart = bounds.a[0] + (regionStart - bounds.a[2]);
+	      var aEnd = bounds.a[1] + (regionEnd - bounds.a[3]);
+	      var bStart = bounds.b[0] + (regionStart - bounds.b[2]);
+	      var bEnd = bounds.b[1] + (regionEnd - bounds.b[3]);
+	      var result = {
+	        stable: false,
+	        aStart: aStart,
+	        aLength: aEnd - aStart,
+	        aContent: a.slice(aStart, aEnd),
+	        oStart: regionStart,
+	        oLength: regionEnd - regionStart,
+	        oContent: o.slice(regionStart, regionEnd),
+	        bStart: bStart,
+	        bLength: bEnd - bStart,
+	        bContent: b.slice(bStart, bEnd)
+	      };
+	      results.push(result);
 	    }
-	    return 2;
-	  }
-
-	  // the line segments share the right endpoint
-	  if (rightCoincide) {
-	    divideSegment(events[0], events[1].point, queue);
-	    return 3;
-	  }
 
-	  // no line segment includes totally the other one
-	  if (events[0] !== events[3].otherEvent) {
-	    divideSegment(events[0], events[1].point, queue);
-	    divideSegment(events[1], events[2].point, queue);
-	    return 3;
+	    currOffset = regionEnd;
 	  }
 
-	  // one line segment includes the other one
-	  divideSegment(events[0], events[1].point, queue);
-	  divideSegment(events[3].otherEvent, events[2].point, queue);
-
-	  return 3;
-	}
-
-	/**
-	 * @param  {SweepEvent} le1
-	 * @param  {SweepEvent} le2
-	 * @return {Number}
-	 */
-	function compareSegments(le1, le2) {
-	  if (le1 === le2) { return 0; }
-
-	  // Segments are not collinear
-	  if (signedArea(le1.point, le1.otherEvent.point, le2.point) !== 0 ||
-	    signedArea(le1.point, le1.otherEvent.point, le2.otherEvent.point) !== 0) {
-
-	    // If they share their left endpoint use the right endpoint to sort
-	    if (equals(le1.point, le2.point)) { return le1.isBelow(le2.otherEvent.point) ? -1 : 1; }
-
-	    // Different left endpoint: use the left endpoint to sort
-	    if (le1.point[0] === le2.point[0]) { return le1.point[1] < le2.point[1] ? -1 : 1; }
+	  advanceTo(o.length);
+	  return results;
+	} // Applies the output of diff3MergeRegions to actually
+	// construct the merged buffer; the returned result alternates
+	// between 'ok' and 'conflict' blocks.
+	// A "false conflict" is where `a` and `b` both change the same from `o`
 
-	    // has the line segment associated to e1 been inserted
-	    // into S after the line segment associated to e2 ?
-	    if (compareEvents(le1, le2) === 1) { return le2.isAbove(le1.point) ? -1 : 1; }
 
-	    // The line segment associated to e2 has been inserted
-	    // into S after the line segment associated to e1
-	    return le1.isBelow(le2.point) ? -1 : 1;
-	  }
+	function diff3Merge(a, o, b, options) {
+	  var defaults = {
+	    excludeFalseConflicts: true,
+	    stringSeparator: /\s+/
+	  };
+	  options = Object.assign(defaults, options);
+	  var aString = typeof a === 'string';
+	  var oString = typeof o === 'string';
+	  var bString = typeof b === 'string';
+	  if (aString) a = a.split(options.stringSeparator);
+	  if (oString) o = o.split(options.stringSeparator);
+	  if (bString) b = b.split(options.stringSeparator);
+	  var results = [];
+	  var regions = diff3MergeRegions(a, o, b);
+	  var okBuffer = [];
 
-	  if (le1.isSubject === le2.isSubject) { // same polygon
-	    var p1 = le1.point, p2 = le2.point;
-	    if (p1[0] === p2[0] && p1[1] === p2[1]/*equals(le1.point, le2.point)*/) {
-	      p1 = le1.otherEvent.point; p2 = le2.otherEvent.point;
-	      if (p1[0] === p2[0] && p1[1] === p2[1]) { return 0; }
-	      else { return le1.contourId > le2.contourId ? 1 : -1; }
+	  function flushOk() {
+	    if (okBuffer.length) {
+	      results.push({
+	        ok: okBuffer
+	      });
 	    }
-	  } else { // Segments are collinear, but belong to separate polygons
-	    return le1.isSubject ? -1 : 1;
-	  }
 
-	  return compareEvents(le1, le2) === 1 ? 1 : -1;
-	}
-
-	function subdivide(eventQueue, subject, clipping, sbbox, cbbox, operation) {
-	  var sweepLine = new SplayTree(compareSegments);
-	  var sortedEvents = [];
-
-	  var rightbound = Math.min(sbbox[2], cbbox[2]);
-
-	  var prev, next, begin;
+	    okBuffer = [];
+	  }
 
-	  while (eventQueue.length !== 0) {
-	    var event = eventQueue.pop();
-	    sortedEvents.push(event);
+	  function isFalseConflict(a, b) {
+	    if (a.length !== b.length) return false;
 
-	    // optimization by bboxes for intersection and difference goes here
-	    if ((operation === INTERSECTION && event.point[0] > rightbound) ||
-	        (operation === DIFFERENCE   && event.point[0] > sbbox[2])) {
-	      break;
+	    for (var i = 0; i < a.length; i++) {
+	      if (a[i] !== b[i]) return false;
 	    }
 
-	    if (event.left) {
-	      next  = prev = sweepLine.insert(event);
-	      begin = sweepLine.minNode();
-
-	      if (prev !== begin) { prev = sweepLine.prev(prev); }
-	      else                { prev = null; }
-
-	      next = sweepLine.next(next);
-
-	      var prevEvent = prev ? prev.key : null;
-	      var prevprevEvent = (void 0);
-	      computeFields(event, prevEvent, operation);
-	      if (next) {
-	        if (possibleIntersection(event, next.key, eventQueue) === 2) {
-	          computeFields(event, prevEvent, operation);
-	          computeFields(event, next.key, operation);
-	        }
-	      }
+	    return true;
+	  }
 
-	      if (prev) {
-	        if (possibleIntersection(prev.key, event, eventQueue) === 2) {
-	          var prevprev = prev;
-	          if (prevprev !== begin) { prevprev = sweepLine.prev(prevprev); }
-	          else                    { prevprev = null; }
+	  regions.forEach(function (region) {
+	    if (region.stable) {
+	      var _okBuffer;
 
-	          prevprevEvent = prevprev ? prevprev.key : null;
-	          computeFields(prevEvent, prevprevEvent, operation);
-	          computeFields(event,     prevEvent,     operation);
-	        }
-	      }
+	      (_okBuffer = okBuffer).push.apply(_okBuffer, _toConsumableArray(region.bufferContent));
 	    } else {
-	      event = event.otherEvent;
-	      next = prev = sweepLine.find(event);
-
-	      if (prev && next) {
-
-	        if (prev !== begin) { prev = sweepLine.prev(prev); }
-	        else                { prev = null; }
-
-	        next = sweepLine.next(next);
-	        sweepLine.remove(event);
+	      if (options.excludeFalseConflicts && isFalseConflict(region.aContent, region.bContent)) {
+	        var _okBuffer2;
 
-	        if (next && prev) {
-	          possibleIntersection(prev.key, next.key, eventQueue);
-	        }
+	        (_okBuffer2 = okBuffer).push.apply(_okBuffer2, _toConsumableArray(region.aContent));
+	      } else {
+	        flushOk();
+	        results.push({
+	          conflict: {
+	            a: region.aContent,
+	            aIndex: region.aStart,
+	            o: region.oContent,
+	            oIndex: region.oStart,
+	            b: region.bContent,
+	            bIndex: region.bStart
+	          }
+	        });
 	      }
 	    }
-	  }
-	  return sortedEvents;
+	  });
+	  flushOk();
+	  return results;
 	}
 
-	var Contour = function Contour() {
-	  this.points = [];
-	  this.holeIds = [];
-	  this.holeOf = null;
-	  this.depth = null;
-	};
-
-	Contour.prototype.isExterior = function isExterior () {
-	  return this.holeOf == null;
-	};
-
-	/**
-	 * @param  {Array.<SweepEvent>} sortedEvents
-	 * @return {Array.<SweepEvent>}
-	 */
-	function orderEvents(sortedEvents) {
-	  var event, i, len, tmp;
-	  var resultEvents = [];
-	  for (i = 0, len = sortedEvents.length; i < len; i++) {
-	    event = sortedEvents[i];
-	    if ((event.left && event.inResult) ||
-	      (!event.left && event.otherEvent.inResult)) {
-	      resultEvents.push(event);
-	    }
-	  }
-	  // Due to overlapping edges the resultEvents array can be not wholly sorted
-	  var sorted = false;
-	  while (!sorted) {
-	    sorted = true;
-	    for (i = 0, len = resultEvents.length; i < len; i++) {
-	      if ((i + 1) < len &&
-	        compareEvents(resultEvents[i], resultEvents[i + 1]) === 1) {
-	        tmp = resultEvents[i];
-	        resultEvents[i] = resultEvents[i + 1];
-	        resultEvents[i + 1] = tmp;
-	        sorted = false;
-	      }
-	    }
-	  }
+	function actionMergeRemoteChanges(id, localGraph, remoteGraph, discardTags, formatUser) {
+	  discardTags = discardTags || {};
+	  var _option = 'safe'; // 'safe', 'force_local', 'force_remote'
 
+	  var _conflicts = [];
 
-	  for (i = 0, len = resultEvents.length; i < len; i++) {
-	    event = resultEvents[i];
-	    event.otherPos = i;
+	  function user(d) {
+	    return typeof formatUser === 'function' ? formatUser(d) : d;
 	  }
 
-	  // imagine, the right event is found in the beginning of the queue,
-	  // when his left counterpart is not marked yet
-	  for (i = 0, len = resultEvents.length; i < len; i++) {
-	    event = resultEvents[i];
-	    if (!event.left) {
-	      tmp = event.otherPos;
-	      event.otherPos = event.otherEvent.otherPos;
-	      event.otherEvent.otherPos = tmp;
+	  function mergeLocation(remote, target) {
+	    function pointEqual(a, b) {
+	      var epsilon = 1e-6;
+	      return Math.abs(a[0] - b[0]) < epsilon && Math.abs(a[1] - b[1]) < epsilon;
 	    }
-	  }
-
-	  return resultEvents;
-	}
-
 
-	/**
-	 * @param  {Number} pos
-	 * @param  {Array.<SweepEvent>} resultEvents
-	 * @param  {Object>}    processed
-	 * @return {Number}
-	 */
-	function nextPos(pos, resultEvents, processed, origPos) {
-	  var newPos = pos + 1,
-	      p = resultEvents[pos].point,
-	      p1;
-	  var length = resultEvents.length;
-
-	  if (newPos < length)
-	    { p1 = resultEvents[newPos].point; }
-
-	  while (newPos < length && p1[0] === p[0] && p1[1] === p[1]) {
-	    if (!processed[newPos]) {
-	      return newPos;
-	    } else   {
-	      newPos++;
-	    }
-	    p1 = resultEvents[newPos].point;
-	  }
-
-	  newPos = pos - 1;
-
-	  while (processed[newPos] && newPos > origPos) {
-	    newPos--;
-	  }
-
-	  return newPos;
-	}
-
-
-	function initializeContourFromContext(event, contours, contourId) {
-	  var contour = new Contour();
-	  if (event.prevInResult != null) {
-	    var prevInResult = event.prevInResult;
-	    // Note that it is valid to query the "previous in result" for its output contour id,
-	    // because we must have already processed it (i.e., assigned an output contour id)
-	    // in an earlier iteration, otherwise it wouldn't be possible that it is "previous in
-	    // result".
-	    var lowerContourId = prevInResult.outputContourId;
-	    var lowerResultTransition = prevInResult.resultTransition;
-	    if (lowerResultTransition > 0) {
-	      // We are inside. Now we have to check if the thing below us is another hole or
-	      // an exterior contour.
-	      var lowerContour = contours[lowerContourId];
-	      if (lowerContour.holeOf != null) {
-	        // The lower contour is a hole => Connect the new contour as a hole to its parent,
-	        // and use same depth.
-	        var parentContourId = lowerContour.holeOf;
-	        contours[parentContourId].holeIds.push(contourId);
-	        contour.holeOf = parentContourId;
-	        contour.depth = contours[lowerContourId].depth;
-	      } else {
-	        // The lower contour is an exterior contour => Connect the new contour as a hole,
-	        // and increment depth.
-	        contours[lowerContourId].holeIds.push(contourId);
-	        contour.holeOf = lowerContourId;
-	        contour.depth = contours[lowerContourId].depth + 1;
-	      }
-	    } else {
-	      // We are outside => this contour is an exterior contour of same depth.
-	      contour.holeOf = null;
-	      contour.depth = contours[lowerContourId].depth;
+	    if (_option === 'force_local' || pointEqual(target.loc, remote.loc)) {
+	      return target;
 	    }
-	  } else {
-	    // There is no lower/previous contour => this contour is an exterior contour of depth 0.
-	    contour.holeOf = null;
-	    contour.depth = 0;
-	  }
-	  return contour;
-	}
-
-	/**
-	 * @param  {Array.<SweepEvent>} sortedEvents
-	 * @return {Array.<*>} polygons
-	 */
-	function connectEdges(sortedEvents) {
-	  var i, len;
-	  var resultEvents = orderEvents(sortedEvents);
-
-	  // "false"-filled array
-	  var processed = {};
-	  var contours = [];
 
-	  var loop = function (  ) {
-
-	    if (processed[i]) {
-	      return;
+	    if (_option === 'force_remote') {
+	      return target.update({
+	        loc: remote.loc
+	      });
 	    }
 
-	    var contourId = contours.length;
-	    var contour = initializeContourFromContext(resultEvents[i], contours, contourId);
-
-	    // Helper function that combines marking an event as processed with assigning its output contour ID
-	    var markAsProcessed = function (pos) {
-	      processed[pos] = true;
-	      resultEvents[pos].outputContourId = contourId;
-	    };
+	    _conflicts.push(_t('merge_remote_changes.conflict.location', {
+	      user: user(remote.user)
+	    }));
 
-	    var pos = i;
-	    var origPos = i;
+	    return target;
+	  }
 
-	    var initial = resultEvents[i].point;
-	    contour.points.push(initial);
+	  function mergeNodes(base, remote, target) {
+	    if (_option === 'force_local' || fastDeepEqual(target.nodes, remote.nodes)) {
+	      return target;
+	    }
 
-	    /* eslint no-constant-condition: "off" */
-	    while (true) {
-	      markAsProcessed(pos);
+	    if (_option === 'force_remote') {
+	      return target.update({
+	        nodes: remote.nodes
+	      });
+	    }
 
-	      pos = resultEvents[pos].otherPos;
+	    var ccount = _conflicts.length;
+	    var o = base.nodes || [];
+	    var a = target.nodes || [];
+	    var b = remote.nodes || [];
+	    var nodes = [];
+	    var hunks = diff3Merge(a, o, b, {
+	      excludeFalseConflicts: true
+	    });
 
-	      markAsProcessed(pos);
-	      contour.points.push(resultEvents[pos].point);
+	    for (var i = 0; i < hunks.length; i++) {
+	      var hunk = hunks[i];
 
-	      pos = nextPos(pos, resultEvents, processed, origPos);
+	      if (hunk.ok) {
+	        nodes.push.apply(nodes, hunk.ok);
+	      } else {
+	        // for all conflicts, we can assume c.a !== c.b
+	        // because `diff3Merge` called with `true` option to exclude false conflicts..
+	        var c = hunk.conflict;
+
+	        if (fastDeepEqual(c.o, c.a)) {
+	          // only changed remotely
+	          nodes.push.apply(nodes, c.b);
+	        } else if (fastDeepEqual(c.o, c.b)) {
+	          // only changed locally
+	          nodes.push.apply(nodes, c.a);
+	        } else {
+	          // changed both locally and remotely
+	          _conflicts.push(_t('merge_remote_changes.conflict.nodelist', {
+	            user: user(remote.user)
+	          }));
 
-	      if (pos == origPos) {
-	        break;
+	          break;
+	        }
 	      }
 	    }
 
-	    contours.push(contour);
-	  };
-
-	  for (i = 0, len = resultEvents.length; i < len; i++) loop(  );
-
-	  return contours;
-	}
-
-	var tinyqueue = TinyQueue;
-	var _default$1 = TinyQueue;
-
-	function TinyQueue(data, compare) {
-	    if (!(this instanceof TinyQueue)) { return new TinyQueue(data, compare); }
-
-	    this.data = data || [];
-	    this.length = this.data.length;
-	    this.compare = compare || defaultCompare$1;
+	    return _conflicts.length === ccount ? target.update({
+	      nodes: nodes
+	    }) : target;
+	  }
 
-	    if (this.length > 0) {
-	        for (var i = (this.length >> 1) - 1; i >= 0; i--) { this._down(i); }
+	  function mergeChildren(targetWay, children, updates, graph) {
+	    function isUsed(node, targetWay) {
+	      var hasInterestingParent = graph.parentWays(node).some(function (way) {
+	        return way.id !== targetWay.id;
+	      });
+	      return node.hasInterestingTags() || hasInterestingParent || graph.parentRelations(node).length > 0;
 	    }
-	}
-
-	function defaultCompare$1(a, b) {
-	    return a < b ? -1 : a > b ? 1 : 0;
-	}
-
-	TinyQueue.prototype = {
-
-	    push: function (item) {
-	        this.data.push(item);
-	        this.length++;
-	        this._up(this.length - 1);
-	    },
 
-	    pop: function () {
-	        if (this.length === 0) { return undefined; }
+	    var ccount = _conflicts.length;
 
-	        var top = this.data[0];
-	        this.length--;
+	    for (var i = 0; i < children.length; i++) {
+	      var id = children[i];
+	      var node = graph.hasEntity(id); // remove unused childNodes..
 
-	        if (this.length > 0) {
-	            this.data[0] = this.data[this.length];
-	            this._down(0);
+	      if (targetWay.nodes.indexOf(id) === -1) {
+	        if (node && !isUsed(node, targetWay)) {
+	          updates.removeIds.push(id);
 	        }
-	        this.data.pop();
 
-	        return top;
-	    },
-
-	    peek: function () {
-	        return this.data[0];
-	    },
-
-	    _up: function (pos) {
-	        var data = this.data;
-	        var compare = this.compare;
-	        var item = data[pos];
+	        continue;
+	      } // restore used childNodes..
 
-	        while (pos > 0) {
-	            var parent = (pos - 1) >> 1;
-	            var current = data[parent];
-	            if (compare(item, current) >= 0) { break; }
-	            data[pos] = current;
-	            pos = parent;
-	        }
 
-	        data[pos] = item;
-	    },
+	      var local = localGraph.hasEntity(id);
+	      var remote = remoteGraph.hasEntity(id);
+	      var target;
 
-	    _down: function (pos) {
-	        var data = this.data;
-	        var compare = this.compare;
-	        var halfLength = this.length >> 1;
-	        var item = data[pos];
+	      if (_option === 'force_remote' && remote && remote.visible) {
+	        updates.replacements.push(remote);
+	      } else if (_option === 'force_local' && local) {
+	        target = osmEntity(local);
 
-	        while (pos < halfLength) {
-	            var left = (pos << 1) + 1;
-	            var right = left + 1;
-	            var best = data[left];
+	        if (remote) {
+	          target = target.update({
+	            version: remote.version
+	          });
+	        }
 
-	            if (right < this.length && compare(data[right], best) < 0) {
-	                left = right;
-	                best = data[right];
-	            }
-	            if (compare(best, item) >= 0) { break; }
+	        updates.replacements.push(target);
+	      } else if (_option === 'safe' && local && remote && local.version !== remote.version) {
+	        target = osmEntity(local, {
+	          version: remote.version
+	        });
 
-	            data[pos] = best;
-	            pos = left;
+	        if (remote.visible) {
+	          target = mergeLocation(remote, target);
+	        } else {
+	          _conflicts.push(_t('merge_remote_changes.conflict.deleted', {
+	            user: user(remote.user)
+	          }));
 	        }
 
-	        data[pos] = item;
+	        if (_conflicts.length !== ccount) break;
+	        updates.replacements.push(target);
+	      }
 	    }
-	};
-	tinyqueue.default = _default$1;
-
-	var max$2 = Math.max;
-	var min = Math.min;
-
-	var contourId = 0;
-
 
-	function processPolygon(contourOrHole, isSubject, depth, Q, bbox, isExteriorRing) {
-	  var i, len, s1, s2, e1, e2;
-	  for (i = 0, len = contourOrHole.length - 1; i < len; i++) {
-	    s1 = contourOrHole[i];
-	    s2 = contourOrHole[i + 1];
-	    e1 = new SweepEvent(s1, false, undefined, isSubject);
-	    e2 = new SweepEvent(s2, false, e1,        isSubject);
-	    e1.otherEvent = e2;
+	    return targetWay;
+	  }
 
-	    if (s1[0] === s2[0] && s1[1] === s2[1]) {
-	      continue; // skip collapsed edges, or it breaks
+	  function updateChildren(updates, graph) {
+	    for (var i = 0; i < updates.replacements.length; i++) {
+	      graph = graph.replace(updates.replacements[i]);
 	    }
 
-	    e1.contourId = e2.contourId = depth;
-	    if (!isExteriorRing) {
-	      e1.isExteriorRing = false;
-	      e2.isExteriorRing = false;
-	    }
-	    if (compareEvents(e1, e2) > 0) {
-	      e2.left = true;
-	    } else {
-	      e1.left = true;
+	    if (updates.removeIds.length) {
+	      graph = actionDeleteMultiple(updates.removeIds)(graph);
 	    }
 
-	    var x = s1[0], y = s1[1];
-	    bbox[0] = min(bbox[0], x);
-	    bbox[1] = min(bbox[1], y);
-	    bbox[2] = max$2(bbox[2], x);
-	    bbox[3] = max$2(bbox[3], y);
-
-	    // Pushing it so the queue is sorted from left to right,
-	    // with object on the left having the highest priority.
-	    Q.push(e1);
-	    Q.push(e2);
+	    return graph;
 	  }
-	}
-
-
-	function fillQueue(subject, clipping, sbbox, cbbox, operation) {
-	  var eventQueue = new tinyqueue(null, compareEvents);
-	  var polygonSet, isExteriorRing, i, ii, j, jj; //, k, kk;
 
-	  for (i = 0, ii = subject.length; i < ii; i++) {
-	    polygonSet = subject[i];
-	    for (j = 0, jj = polygonSet.length; j < jj; j++) {
-	      isExteriorRing = j === 0;
-	      if (isExteriorRing) { contourId++; }
-	      processPolygon(polygonSet[j], true, contourId, eventQueue, sbbox, isExteriorRing);
+	  function mergeMembers(remote, target) {
+	    if (_option === 'force_local' || fastDeepEqual(target.members, remote.members)) {
+	      return target;
 	    }
-	  }
 
-	  for (i = 0, ii = clipping.length; i < ii; i++) {
-	    polygonSet = clipping[i];
-	    for (j = 0, jj = polygonSet.length; j < jj; j++) {
-	      isExteriorRing = j === 0;
-	      if (operation === DIFFERENCE) { isExteriorRing = false; }
-	      if (isExteriorRing) { contourId++; }
-	      processPolygon(polygonSet[j], false, contourId, eventQueue, cbbox, isExteriorRing);
+	    if (_option === 'force_remote') {
+	      return target.update({
+	        members: remote.members
+	      });
 	    }
-	  }
-
-	  return eventQueue;
-	}
-
-	var EMPTY = [];
 
+	    _conflicts.push(_t('merge_remote_changes.conflict.memberlist', {
+	      user: user(remote.user)
+	    }));
 
-	function trivialOperation(subject, clipping, operation) {
-	  var result = null;
-	  if (subject.length * clipping.length === 0) {
-	    if        (operation === INTERSECTION) {
-	      result = EMPTY;
-	    } else if (operation === DIFFERENCE) {
-	      result = subject;
-	    } else if (operation === UNION ||
-	               operation === XOR) {
-	      result = (subject.length === 0) ? clipping : subject;
-	    }
+	    return target;
 	  }
-	  return result;
-	}
 
-
-	function compareBBoxes(subject, clipping, sbbox, cbbox, operation) {
-	  var result = null;
-	  if (sbbox[0] > cbbox[2] ||
-	      cbbox[0] > sbbox[2] ||
-	      sbbox[1] > cbbox[3] ||
-	      cbbox[1] > sbbox[3]) {
-	    if        (operation === INTERSECTION) {
-	      result = EMPTY;
-	    } else if (operation === DIFFERENCE) {
-	      result = subject;
-	    } else if (operation === UNION ||
-	               operation === XOR) {
-	      result = subject.concat(clipping);
+	  function mergeTags(base, remote, target) {
+	    if (_option === 'force_local' || fastDeepEqual(target.tags, remote.tags)) {
+	      return target;
 	    }
-	  }
-	  return result;
-	}
-
-
-	function boolean(subject, clipping, operation) {
-	  if (typeof subject[0][0][0] === 'number') {
-	    subject = [subject];
-	  }
-	  if (typeof clipping[0][0][0] === 'number') {
-	    clipping = [clipping];
-	  }
-	  var trivial = trivialOperation(subject, clipping, operation);
-	  if (trivial) {
-	    return trivial === EMPTY ? null : trivial;
-	  }
-	  var sbbox = [Infinity, Infinity, -Infinity, -Infinity];
-	  var cbbox = [Infinity, Infinity, -Infinity, -Infinity];
-
-	  // console.time('fill queue');
-	  var eventQueue = fillQueue(subject, clipping, sbbox, cbbox, operation);
-	  //console.timeEnd('fill queue');
 
-	  trivial = compareBBoxes(subject, clipping, sbbox, cbbox, operation);
-	  if (trivial) {
-	    return trivial === EMPTY ? null : trivial;
-	  }
-	  // console.time('subdivide edges');
-	  var sortedEvents = subdivide(eventQueue, subject, clipping, sbbox, cbbox, operation);
-	  //console.timeEnd('subdivide edges');
+	    if (_option === 'force_remote') {
+	      return target.update({
+	        tags: remote.tags
+	      });
+	    }
 
-	  // console.time('connect vertices');
-	  var contours = connectEdges(sortedEvents);
-	  //console.timeEnd('connect vertices');
+	    var ccount = _conflicts.length;
+	    var o = base.tags || {};
+	    var a = target.tags || {};
+	    var b = remote.tags || {};
+	    var keys = utilArrayUnion(utilArrayUnion(Object.keys(o), Object.keys(a)), Object.keys(b)).filter(function (k) {
+	      return !discardTags[k];
+	    });
+	    var tags = Object.assign({}, a); // shallow copy
+
+	    var changed = false;
+
+	    for (var i = 0; i < keys.length; i++) {
+	      var k = keys[i];
+
+	      if (o[k] !== b[k] && a[k] !== b[k]) {
+	        // changed remotely..
+	        if (o[k] !== a[k]) {
+	          // changed locally..
+	          _conflicts.push(_t('merge_remote_changes.conflict.tags', {
+	            tag: k,
+	            local: a[k],
+	            remote: b[k],
+	            user: user(remote.user)
+	          }));
+	        } else {
+	          // unchanged locally, accept remote change..
+	          if (b.hasOwnProperty(k)) {
+	            tags[k] = b[k];
+	          } else {
+	            delete tags[k];
+	          }
 
-	  // Convert contours to polygons
-	  var polygons = [];
-	  for (var i = 0; i < contours.length; i++) {
-	    var contour = contours[i];
-	    if (contour.isExterior()) {
-	      // The exterior ring goes first
-	      var rings = [contour.points];
-	      // Followed by holes if any
-	      for (var j = 0; j < contour.holeIds.length; j++) {
-	        var holeId = contour.holeIds[j];
-	        rings.push(contours[holeId].points);
+	          changed = true;
+	        }
 	      }
-	      polygons.push(rings);
 	    }
-	  }
-
-	  return polygons;
-	}
-
-	function union (subject, clipping) {
-	  return boolean(subject, clipping, UNION);
-	}
-
-	var read$6 = function (buffer, offset, isLE, mLen, nBytes) {
-	  var e, m;
-	  var eLen = (nBytes * 8) - mLen - 1;
-	  var eMax = (1 << eLen) - 1;
-	  var eBias = eMax >> 1;
-	  var nBits = -7;
-	  var i = isLE ? (nBytes - 1) : 0;
-	  var d = isLE ? -1 : 1;
-	  var s = buffer[offset + i];
 
-	  i += d;
+	    return changed && _conflicts.length === ccount ? target.update({
+	      tags: tags
+	    }) : target;
+	  } //  `graph.base()` is the common ancestor of the two graphs.
+	  //  `localGraph` contains user's edits up to saving
+	  //  `remoteGraph` contains remote edits to modified nodes
+	  //  `graph` must be a descendent of `localGraph` and may include
+	  //      some conflict resolution actions performed on it.
+	  //
+	  //                  --- ... --- `localGraph` -- ... -- `graph`
+	  //                 /
+	  //  `graph.base()` --- ... --- `remoteGraph`
+	  //
 
-	  e = s & ((1 << (-nBits)) - 1);
-	  s >>= (-nBits);
-	  nBits += eLen;
-	  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}
 
-	  m = e & ((1 << (-nBits)) - 1);
-	  e >>= (-nBits);
-	  nBits += mLen;
-	  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}
+	  var action = function action(graph) {
+	    var updates = {
+	      replacements: [],
+	      removeIds: []
+	    };
+	    var base = graph.base().entities[id];
+	    var local = localGraph.entity(id);
+	    var remote = remoteGraph.entity(id);
+	    var target = osmEntity(local, {
+	      version: remote.version
+	    }); // delete/undelete
 
-	  if (e === 0) {
-	    e = 1 - eBias;
-	  } else if (e === eMax) {
-	    return m ? NaN : ((s ? -1 : 1) * Infinity)
-	  } else {
-	    m = m + Math.pow(2, mLen);
-	    e = e - eBias;
-	  }
-	  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
-	};
+	    if (!remote.visible) {
+	      if (_option === 'force_remote') {
+	        return actionDeleteMultiple([id])(graph);
+	      } else if (_option === 'force_local') {
+	        if (target.type === 'way') {
+	          target = mergeChildren(target, utilArrayUniq(local.nodes), updates, graph);
+	          graph = updateChildren(updates, graph);
+	        }
 
-	var write$6 = function (buffer, value, offset, isLE, mLen, nBytes) {
-	  var e, m, c;
-	  var eLen = (nBytes * 8) - mLen - 1;
-	  var eMax = (1 << eLen) - 1;
-	  var eBias = eMax >> 1;
-	  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0);
-	  var i = isLE ? 0 : (nBytes - 1);
-	  var d = isLE ? 1 : -1;
-	  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0;
+	        return graph.replace(target);
+	      } else {
+	        _conflicts.push(_t('merge_remote_changes.conflict.deleted', {
+	          user: user(remote.user)
+	        }));
 
-	  value = Math.abs(value);
+	        return graph; // do nothing
+	      }
+	    } // merge
 
-	  if (isNaN(value) || value === Infinity) {
-	    m = isNaN(value) ? 1 : 0;
-	    e = eMax;
-	  } else {
-	    e = Math.floor(Math.log(value) / Math.LN2);
-	    if (value * (c = Math.pow(2, -e)) < 1) {
-	      e--;
-	      c *= 2;
-	    }
-	    if (e + eBias >= 1) {
-	      value += rt / c;
-	    } else {
-	      value += rt * Math.pow(2, 1 - eBias);
-	    }
-	    if (value * c >= 2) {
-	      e++;
-	      c /= 2;
-	    }
 
-	    if (e + eBias >= eMax) {
-	      m = 0;
-	      e = eMax;
-	    } else if (e + eBias >= 1) {
-	      m = ((value * c) - 1) * Math.pow(2, mLen);
-	      e = e + eBias;
-	    } else {
-	      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen);
-	      e = 0;
+	    if (target.type === 'node') {
+	      target = mergeLocation(remote, target);
+	    } else if (target.type === 'way') {
+	      // pull in any child nodes that may not be present locally..
+	      graph.rebase(remoteGraph.childNodes(remote), [graph], false);
+	      target = mergeNodes(base, remote, target);
+	      target = mergeChildren(target, utilArrayUnion(local.nodes, remote.nodes), updates, graph);
+	    } else if (target.type === 'relation') {
+	      target = mergeMembers(remote, target);
 	    }
-	  }
 
-	  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
-
-	  e = (e << mLen) | m;
-	  eLen += mLen;
-	  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
+	    target = mergeTags(base, remote, target);
 
-	  buffer[offset + i - d] |= s * 128;
-	};
-
-	var ieee754 = {
-		read: read$6,
-		write: write$6
-	};
+	    if (!_conflicts.length) {
+	      graph = updateChildren(updates, graph).replace(target);
+	    }
 
-	var pbf = Pbf;
+	    return graph;
+	  };
 
+	  action.withOption = function (opt) {
+	    _option = opt;
+	    return action;
+	  };
 
+	  action.conflicts = function () {
+	    return _conflicts;
+	  };
 
-	function Pbf(buf) {
-	    this.buf = ArrayBuffer.isView && ArrayBuffer.isView(buf) ? buf : new Uint8Array(buf || 0);
-	    this.pos = 0;
-	    this.type = 0;
-	    this.length = this.buf.length;
+	  return action;
 	}
 
-	Pbf.Varint  = 0; // varint: int32, int64, uint32, uint64, sint32, sint64, bool, enum
-	Pbf.Fixed64 = 1; // 64-bit: double, fixed64, sfixed64
-	Pbf.Bytes   = 2; // length-delimited: string, bytes, embedded messages, packed repeated fields
-	Pbf.Fixed32 = 5; // 32-bit: float, fixed32, sfixed32
-
-	var SHIFT_LEFT_32 = (1 << 16) * (1 << 16),
-	    SHIFT_RIGHT_32 = 1 / SHIFT_LEFT_32;
-
-	// Threshold chosen based on both benchmarking and knowledge about browser string
-	// data structures (which currently switch structure types at 12 bytes or more)
-	var TEXT_DECODER_MIN_LENGTH = 12;
-	var utf8TextDecoder = typeof TextDecoder === 'undefined' ? null : new TextDecoder('utf8');
-
-	Pbf.prototype = {
+	// https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MoveNodeAction.as
 
-	    destroy: function() {
-	        this.buf = null;
-	    },
+	function actionMove(moveIDs, tryDelta, projection, cache) {
+	  var _delta = tryDelta;
 
-	    // === READING =================================================================
+	  function setupCache(graph) {
+	    function canMove(nodeID) {
+	      // Allow movement of any node that is in the selectedIDs list..
+	      if (moveIDs.indexOf(nodeID) !== -1) return true; // Allow movement of a vertex where 2 ways meet..
 
-	    readFields: function(readField, result, end) {
-	        end = end || this.length;
+	      var parents = graph.parentWays(graph.entity(nodeID));
+	      if (parents.length < 3) return true; // Restrict movement of a vertex where >2 ways meet, unless all parentWays are moving too..
 
-	        while (this.pos < end) {
-	            var val = this.readVarint(),
-	                tag = val >> 3,
-	                startPos = this.pos;
+	      var parentsMoving = parents.every(function (way) {
+	        return cache.moving[way.id];
+	      });
+	      if (!parentsMoving) delete cache.moving[nodeID];
+	      return parentsMoving;
+	    }
 
-	            this.type = val & 0x7;
-	            readField(tag, result, this);
+	    function cacheEntities(ids) {
+	      for (var i = 0; i < ids.length; i++) {
+	        var id = ids[i];
+	        if (cache.moving[id]) continue;
+	        cache.moving[id] = true;
+	        var entity = graph.hasEntity(id);
+	        if (!entity) continue;
 
-	            if (this.pos === startPos) { this.skip(val); }
+	        if (entity.type === 'node') {
+	          cache.nodes.push(id);
+	          cache.startLoc[id] = entity.loc;
+	        } else if (entity.type === 'way') {
+	          cache.ways.push(id);
+	          cacheEntities(entity.nodes);
+	        } else {
+	          cacheEntities(entity.members.map(function (member) {
+	            return member.id;
+	          }));
 	        }
-	        return result;
-	    },
-
-	    readMessage: function(readField, result) {
-	        return this.readFields(readField, result, this.readVarint() + this.pos);
-	    },
-
-	    readFixed32: function() {
-	        var val = readUInt32(this.buf, this.pos);
-	        this.pos += 4;
-	        return val;
-	    },
-
-	    readSFixed32: function() {
-	        var val = readInt32(this.buf, this.pos);
-	        this.pos += 4;
-	        return val;
-	    },
-
-	    // 64-bit int handling is based on github.com/dpw/node-buffer-more-ints (MIT-licensed)
-
-	    readFixed64: function() {
-	        var val = readUInt32(this.buf, this.pos) + readUInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
-	        this.pos += 8;
-	        return val;
-	    },
-
-	    readSFixed64: function() {
-	        var val = readUInt32(this.buf, this.pos) + readInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
-	        this.pos += 8;
-	        return val;
-	    },
-
-	    readFloat: function() {
-	        var val = ieee754.read(this.buf, this.pos, true, 23, 4);
-	        this.pos += 4;
-	        return val;
-	    },
-
-	    readDouble: function() {
-	        var val = ieee754.read(this.buf, this.pos, true, 52, 8);
-	        this.pos += 8;
-	        return val;
-	    },
+	      }
+	    }
 
-	    readVarint: function(isSigned) {
-	        var buf = this.buf,
-	            val, b;
+	    function cacheIntersections(ids) {
+	      function isEndpoint(way, id) {
+	        return !way.isClosed() && !!way.affix(id);
+	      }
 
-	        b = buf[this.pos++]; val  =  b & 0x7f;        if (b < 0x80) { return val; }
-	        b = buf[this.pos++]; val |= (b & 0x7f) << 7;  if (b < 0x80) { return val; }
-	        b = buf[this.pos++]; val |= (b & 0x7f) << 14; if (b < 0x80) { return val; }
-	        b = buf[this.pos++]; val |= (b & 0x7f) << 21; if (b < 0x80) { return val; }
-	        b = buf[this.pos];   val |= (b & 0x0f) << 28;
+	      for (var i = 0; i < ids.length; i++) {
+	        var id = ids[i]; // consider only intersections with 1 moved and 1 unmoved way.
 
-	        return readVarintRemainder(val, isSigned, this);
-	    },
+	        var childNodes = graph.childNodes(graph.entity(id));
 
-	    readVarint64: function() { // for compatibility with v2.0.1
-	        return this.readVarint(true);
-	    },
+	        for (var j = 0; j < childNodes.length; j++) {
+	          var node = childNodes[j];
+	          var parents = graph.parentWays(node);
+	          if (parents.length !== 2) continue;
+	          var moved = graph.entity(id);
+	          var unmoved = null;
 
-	    readSVarint: function() {
-	        var num = this.readVarint();
-	        return num % 2 === 1 ? (num + 1) / -2 : num / 2; // zigzag encoding
-	    },
+	          for (var k = 0; k < parents.length; k++) {
+	            var way = parents[k];
 
-	    readBoolean: function() {
-	        return Boolean(this.readVarint());
-	    },
+	            if (!cache.moving[way.id]) {
+	              unmoved = way;
+	              break;
+	            }
+	          }
 
-	    readString: function() {
-	        var end = this.readVarint() + this.pos;
-	        var pos = this.pos;
-	        this.pos = end;
+	          if (!unmoved) continue; // exclude ways that are overly connected..
 
-	        if (end - pos >= TEXT_DECODER_MIN_LENGTH && utf8TextDecoder) {
-	            // longer strings are fast with the built-in browser TextDecoder API
-	            return readUtf8TextDecoder(this.buf, pos, end);
+	          if (utilArrayIntersection(moved.nodes, unmoved.nodes).length > 2) continue;
+	          if (moved.isArea() || unmoved.isArea()) continue;
+	          cache.intersections.push({
+	            nodeId: node.id,
+	            movedId: moved.id,
+	            unmovedId: unmoved.id,
+	            movedIsEP: isEndpoint(moved, node.id),
+	            unmovedIsEP: isEndpoint(unmoved, node.id)
+	          });
 	        }
-	        // short strings are fast with our custom implementation
-	        return readUtf8(this.buf, pos, end);
-	    },
-
-	    readBytes: function() {
-	        var end = this.readVarint() + this.pos,
-	            buffer = this.buf.subarray(this.pos, end);
-	        this.pos = end;
-	        return buffer;
-	    },
-
-	    // verbose for performance reasons; doesn't affect gzipped size
+	      }
+	    }
 
-	    readPackedVarint: function(arr, isSigned) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readVarint(isSigned)); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readVarint(isSigned)); }
-	        return arr;
-	    },
-	    readPackedSVarint: function(arr) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readSVarint()); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readSVarint()); }
-	        return arr;
-	    },
-	    readPackedBoolean: function(arr) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readBoolean()); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readBoolean()); }
-	        return arr;
-	    },
-	    readPackedFloat: function(arr) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readFloat()); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readFloat()); }
-	        return arr;
-	    },
-	    readPackedDouble: function(arr) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readDouble()); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readDouble()); }
-	        return arr;
-	    },
-	    readPackedFixed32: function(arr) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readFixed32()); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readFixed32()); }
-	        return arr;
-	    },
-	    readPackedSFixed32: function(arr) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readSFixed32()); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readSFixed32()); }
-	        return arr;
-	    },
-	    readPackedFixed64: function(arr) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readFixed64()); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readFixed64()); }
-	        return arr;
-	    },
-	    readPackedSFixed64: function(arr) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readSFixed64()); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readSFixed64()); }
-	        return arr;
-	    },
+	    if (!cache) {
+	      cache = {};
+	    }
 
-	    skip: function(val) {
-	        var type = val & 0x7;
-	        if (type === Pbf.Varint) { while (this.buf[this.pos++] > 0x7f) {} }
-	        else if (type === Pbf.Bytes) { this.pos = this.readVarint() + this.pos; }
-	        else if (type === Pbf.Fixed32) { this.pos += 4; }
-	        else if (type === Pbf.Fixed64) { this.pos += 8; }
-	        else { throw new Error('Unimplemented type: ' + type); }
-	    },
+	    if (!cache.ok) {
+	      cache.moving = {};
+	      cache.intersections = [];
+	      cache.replacedVertex = {};
+	      cache.startLoc = {};
+	      cache.nodes = [];
+	      cache.ways = [];
+	      cacheEntities(moveIDs);
+	      cacheIntersections(cache.ways);
+	      cache.nodes = cache.nodes.filter(canMove);
+	      cache.ok = true;
+	    }
+	  } // Place a vertex where the moved vertex used to be, to preserve way shape..
+	  //
+	  //  Start:
+	  //      b ---- e
+	  //     / \
+	  //    /   \
+	  //   /     \
+	  //  a       c
+	  //
+	  //      *               node '*' added to preserve shape
+	  //     / \
+	  //    /   b ---- e      way `b,e` moved here:
+	  //   /     \
+	  //  a       c
+	  //
+	  //
 
-	    // === WRITING =================================================================
 
-	    writeTag: function(tag, type) {
-	        this.writeVarint((tag << 3) | type);
-	    },
+	  function replaceMovedVertex(nodeId, wayId, graph, delta) {
+	    var way = graph.entity(wayId);
+	    var moved = graph.entity(nodeId);
+	    var movedIndex = way.nodes.indexOf(nodeId);
+	    var len, prevIndex, nextIndex;
 
-	    realloc: function(min) {
-	        var length = this.length || 16;
+	    if (way.isClosed()) {
+	      len = way.nodes.length - 1;
+	      prevIndex = (movedIndex + len - 1) % len;
+	      nextIndex = (movedIndex + len + 1) % len;
+	    } else {
+	      len = way.nodes.length;
+	      prevIndex = movedIndex - 1;
+	      nextIndex = movedIndex + 1;
+	    }
 
-	        while (length < this.pos + min) { length *= 2; }
+	    var prev = graph.hasEntity(way.nodes[prevIndex]);
+	    var next = graph.hasEntity(way.nodes[nextIndex]); // Don't add orig vertex at endpoint..
 
-	        if (length !== this.length) {
-	            var buf = new Uint8Array(length);
-	            buf.set(this.buf);
-	            this.buf = buf;
-	            this.length = length;
-	        }
-	    },
+	    if (!prev || !next) return graph;
+	    var key = wayId + '_' + nodeId;
+	    var orig = cache.replacedVertex[key];
 
-	    finish: function() {
-	        this.length = this.pos;
-	        this.pos = 0;
-	        return this.buf.subarray(0, this.length);
-	    },
+	    if (!orig) {
+	      orig = osmNode();
+	      cache.replacedVertex[key] = orig;
+	      cache.startLoc[orig.id] = cache.startLoc[nodeId];
+	    }
 
-	    writeFixed32: function(val) {
-	        this.realloc(4);
-	        writeInt32(this.buf, val, this.pos);
-	        this.pos += 4;
-	    },
+	    var start, end;
 
-	    writeSFixed32: function(val) {
-	        this.realloc(4);
-	        writeInt32(this.buf, val, this.pos);
-	        this.pos += 4;
-	    },
+	    if (delta) {
+	      start = projection(cache.startLoc[nodeId]);
+	      end = projection.invert(geoVecAdd(start, delta));
+	    } else {
+	      end = cache.startLoc[nodeId];
+	    }
 
-	    writeFixed64: function(val) {
-	        this.realloc(8);
-	        writeInt32(this.buf, val & -1, this.pos);
-	        writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);
-	        this.pos += 8;
-	    },
+	    orig = orig.move(end);
+	    var angle = Math.abs(geoAngle(orig, prev, projection) - geoAngle(orig, next, projection)) * 180 / Math.PI; // Don't add orig vertex if it would just make a straight line..
 
-	    writeSFixed64: function(val) {
-	        this.realloc(8);
-	        writeInt32(this.buf, val & -1, this.pos);
-	        writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);
-	        this.pos += 8;
-	    },
+	    if (angle > 175 && angle < 185) return graph; // moving forward or backward along way?
 
-	    writeVarint: function(val) {
-	        val = +val || 0;
+	    var p1 = [prev.loc, orig.loc, moved.loc, next.loc].map(projection);
+	    var p2 = [prev.loc, moved.loc, orig.loc, next.loc].map(projection);
+	    var d1 = geoPathLength(p1);
+	    var d2 = geoPathLength(p2);
+	    var insertAt = d1 <= d2 ? movedIndex : nextIndex; // moving around closed loop?
 
-	        if (val > 0xfffffff || val < 0) {
-	            writeBigVarint(val, this);
-	            return;
-	        }
+	    if (way.isClosed() && insertAt === 0) insertAt = len;
+	    way = way.addNode(orig.id, insertAt);
+	    return graph.replace(orig).replace(way);
+	  } // Remove duplicate vertex that might have been added by
+	  // replaceMovedVertex.  This is done after the unzorro checks.
 
-	        this.realloc(4);
 
-	        this.buf[this.pos++] =           val & 0x7f  | (val > 0x7f ? 0x80 : 0); if (val <= 0x7f) { return; }
-	        this.buf[this.pos++] = ((val >>>= 7) & 0x7f) | (val > 0x7f ? 0x80 : 0); if (val <= 0x7f) { return; }
-	        this.buf[this.pos++] = ((val >>>= 7) & 0x7f) | (val > 0x7f ? 0x80 : 0); if (val <= 0x7f) { return; }
-	        this.buf[this.pos++] =   (val >>> 7) & 0x7f;
-	    },
+	  function removeDuplicateVertices(wayId, graph) {
+	    var way = graph.entity(wayId);
+	    var epsilon = 1e-6;
+	    var prev, curr;
 
-	    writeSVarint: function(val) {
-	        this.writeVarint(val < 0 ? -val * 2 - 1 : val * 2);
-	    },
+	    function isInteresting(node, graph) {
+	      return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
+	    }
 
-	    writeBoolean: function(val) {
-	        this.writeVarint(Boolean(val));
-	    },
+	    for (var i = 0; i < way.nodes.length; i++) {
+	      curr = graph.entity(way.nodes[i]);
 
-	    writeString: function(str) {
-	        str = String(str);
-	        this.realloc(str.length * 4);
+	      if (prev && curr && geoVecEqual(prev.loc, curr.loc, epsilon)) {
+	        if (!isInteresting(prev, graph)) {
+	          way = way.removeNode(prev.id);
+	          graph = graph.replace(way).remove(prev);
+	        } else if (!isInteresting(curr, graph)) {
+	          way = way.removeNode(curr.id);
+	          graph = graph.replace(way).remove(curr);
+	        }
+	      }
 
-	        this.pos++; // reserve 1 byte for short string length
+	      prev = curr;
+	    }
 
-	        var startPos = this.pos;
-	        // write the string directly to the buffer and see how much was written
-	        this.pos = writeUtf8(this.buf, str, this.pos);
-	        var len = this.pos - startPos;
+	    return graph;
+	  } // Reorder nodes around intersections that have moved..
+	  //
+	  //  Start:                way1.nodes: b,e         (moving)
+	  //  a - b - c ----- d     way2.nodes: a,b,c,d     (static)
+	  //      |                 vertex: b
+	  //      e                 isEP1: true,  isEP2, false
+	  //
+	  //  way1 `b,e` moved here:
+	  //  a ----- c = b - d
+	  //              |
+	  //              e
+	  //
+	  //  reorder nodes         way1.nodes: b,e
+	  //  a ----- c - b - d     way2.nodes: a,c,b,d
+	  //              |
+	  //              e
+	  //
 
-	        if (len >= 0x80) { makeRoomForExtraLength(startPos, len, this); }
 
-	        // finally, write the message length in the reserved place and restore the position
-	        this.pos = startPos - 1;
-	        this.writeVarint(len);
-	        this.pos += len;
-	    },
+	  function unZorroIntersection(intersection, graph) {
+	    var vertex = graph.entity(intersection.nodeId);
+	    var way1 = graph.entity(intersection.movedId);
+	    var way2 = graph.entity(intersection.unmovedId);
+	    var isEP1 = intersection.movedIsEP;
+	    var isEP2 = intersection.unmovedIsEP; // don't move the vertex if it is the endpoint of both ways.
 
-	    writeFloat: function(val) {
-	        this.realloc(4);
-	        ieee754.write(this.buf, val, this.pos, true, 23, 4);
-	        this.pos += 4;
-	    },
+	    if (isEP1 && isEP2) return graph;
+	    var nodes1 = graph.childNodes(way1).filter(function (n) {
+	      return n !== vertex;
+	    });
+	    var nodes2 = graph.childNodes(way2).filter(function (n) {
+	      return n !== vertex;
+	    });
+	    if (way1.isClosed() && way1.first() === vertex.id) nodes1.push(nodes1[0]);
+	    if (way2.isClosed() && way2.first() === vertex.id) nodes2.push(nodes2[0]);
+	    var edge1 = !isEP1 && geoChooseEdge(nodes1, projection(vertex.loc), projection);
+	    var edge2 = !isEP2 && geoChooseEdge(nodes2, projection(vertex.loc), projection);
+	    var loc; // snap vertex to nearest edge (or some point between them)..
+
+	    if (!isEP1 && !isEP2) {
+	      var epsilon = 1e-6,
+	          maxIter = 10;
+
+	      for (var i = 0; i < maxIter; i++) {
+	        loc = geoVecInterp(edge1.loc, edge2.loc, 0.5);
+	        edge1 = geoChooseEdge(nodes1, projection(loc), projection);
+	        edge2 = geoChooseEdge(nodes2, projection(loc), projection);
+	        if (Math.abs(edge1.distance - edge2.distance) < epsilon) break;
+	      }
+	    } else if (!isEP1) {
+	      loc = edge1.loc;
+	    } else {
+	      loc = edge2.loc;
+	    }
 
-	    writeDouble: function(val) {
-	        this.realloc(8);
-	        ieee754.write(this.buf, val, this.pos, true, 52, 8);
-	        this.pos += 8;
-	    },
+	    graph = graph.replace(vertex.move(loc)); // if zorro happened, reorder nodes..
 
-	    writeBytes: function(buffer) {
-	        var len = buffer.length;
-	        this.writeVarint(len);
-	        this.realloc(len);
-	        for (var i = 0; i < len; i++) { this.buf[this.pos++] = buffer[i]; }
-	    },
+	    if (!isEP1 && edge1.index !== way1.nodes.indexOf(vertex.id)) {
+	      way1 = way1.removeNode(vertex.id).addNode(vertex.id, edge1.index);
+	      graph = graph.replace(way1);
+	    }
 
-	    writeRawMessage: function(fn, obj) {
-	        this.pos++; // reserve 1 byte for short message length
+	    if (!isEP2 && edge2.index !== way2.nodes.indexOf(vertex.id)) {
+	      way2 = way2.removeNode(vertex.id).addNode(vertex.id, edge2.index);
+	      graph = graph.replace(way2);
+	    }
 
-	        // write the message directly to the buffer and see how much was written
-	        var startPos = this.pos;
-	        fn(obj, this);
-	        var len = this.pos - startPos;
+	    return graph;
+	  }
 
-	        if (len >= 0x80) { makeRoomForExtraLength(startPos, len, this); }
+	  function cleanupIntersections(graph) {
+	    for (var i = 0; i < cache.intersections.length; i++) {
+	      var obj = cache.intersections[i];
+	      graph = replaceMovedVertex(obj.nodeId, obj.movedId, graph, _delta);
+	      graph = replaceMovedVertex(obj.nodeId, obj.unmovedId, graph, null);
+	      graph = unZorroIntersection(obj, graph);
+	      graph = removeDuplicateVertices(obj.movedId, graph);
+	      graph = removeDuplicateVertices(obj.unmovedId, graph);
+	    }
 
-	        // finally, write the message length in the reserved place and restore the position
-	        this.pos = startPos - 1;
-	        this.writeVarint(len);
-	        this.pos += len;
-	    },
+	    return graph;
+	  } // check if moving way endpoint can cross an unmoved way, if so limit delta..
 
-	    writeMessage: function(tag, fn, obj) {
-	        this.writeTag(tag, Pbf.Bytes);
-	        this.writeRawMessage(fn, obj);
-	    },
 
-	    writePackedVarint:   function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedVarint, arr); }   },
-	    writePackedSVarint:  function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedSVarint, arr); }  },
-	    writePackedBoolean:  function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedBoolean, arr); }  },
-	    writePackedFloat:    function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedFloat, arr); }    },
-	    writePackedDouble:   function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedDouble, arr); }   },
-	    writePackedFixed32:  function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedFixed32, arr); }  },
-	    writePackedSFixed32: function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedSFixed32, arr); } },
-	    writePackedFixed64:  function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedFixed64, arr); }  },
-	    writePackedSFixed64: function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedSFixed64, arr); } },
-
-	    writeBytesField: function(tag, buffer) {
-	        this.writeTag(tag, Pbf.Bytes);
-	        this.writeBytes(buffer);
-	    },
-	    writeFixed32Field: function(tag, val) {
-	        this.writeTag(tag, Pbf.Fixed32);
-	        this.writeFixed32(val);
-	    },
-	    writeSFixed32Field: function(tag, val) {
-	        this.writeTag(tag, Pbf.Fixed32);
-	        this.writeSFixed32(val);
-	    },
-	    writeFixed64Field: function(tag, val) {
-	        this.writeTag(tag, Pbf.Fixed64);
-	        this.writeFixed64(val);
-	    },
-	    writeSFixed64Field: function(tag, val) {
-	        this.writeTag(tag, Pbf.Fixed64);
-	        this.writeSFixed64(val);
-	    },
-	    writeVarintField: function(tag, val) {
-	        this.writeTag(tag, Pbf.Varint);
-	        this.writeVarint(val);
-	    },
-	    writeSVarintField: function(tag, val) {
-	        this.writeTag(tag, Pbf.Varint);
-	        this.writeSVarint(val);
-	    },
-	    writeStringField: function(tag, str) {
-	        this.writeTag(tag, Pbf.Bytes);
-	        this.writeString(str);
-	    },
-	    writeFloatField: function(tag, val) {
-	        this.writeTag(tag, Pbf.Fixed32);
-	        this.writeFloat(val);
-	    },
-	    writeDoubleField: function(tag, val) {
-	        this.writeTag(tag, Pbf.Fixed64);
-	        this.writeDouble(val);
-	    },
-	    writeBooleanField: function(tag, val) {
-	        this.writeVarintField(tag, Boolean(val));
+	  function limitDelta(graph) {
+	    function moveNode(loc) {
+	      return geoVecAdd(projection(loc), _delta);
 	    }
-	};
 
-	function readVarintRemainder(l, s, p) {
-	    var buf = p.buf,
-	        h, b;
-
-	    b = buf[p.pos++]; h  = (b & 0x70) >> 4;  if (b < 0x80) { return toNum(l, h, s); }
-	    b = buf[p.pos++]; h |= (b & 0x7f) << 3;  if (b < 0x80) { return toNum(l, h, s); }
-	    b = buf[p.pos++]; h |= (b & 0x7f) << 10; if (b < 0x80) { return toNum(l, h, s); }
-	    b = buf[p.pos++]; h |= (b & 0x7f) << 17; if (b < 0x80) { return toNum(l, h, s); }
-	    b = buf[p.pos++]; h |= (b & 0x7f) << 24; if (b < 0x80) { return toNum(l, h, s); }
-	    b = buf[p.pos++]; h |= (b & 0x01) << 31; if (b < 0x80) { return toNum(l, h, s); }
+	    for (var i = 0; i < cache.intersections.length; i++) {
+	      var obj = cache.intersections[i]; // Don't limit movement if this is vertex joins 2 endpoints..
 
-	    throw new Error('Expected varint not more than 10 bytes');
-	}
+	      if (obj.movedIsEP && obj.unmovedIsEP) continue; // Don't limit movement if this vertex is not an endpoint anyway..
 
-	function readPackedEnd(pbf) {
-	    return pbf.type === Pbf.Bytes ?
-	        pbf.readVarint() + pbf.pos : pbf.pos + 1;
-	}
+	      if (!obj.movedIsEP) continue;
+	      var node = graph.entity(obj.nodeId);
+	      var start = projection(node.loc);
+	      var end = geoVecAdd(start, _delta);
+	      var movedNodes = graph.childNodes(graph.entity(obj.movedId));
+	      var movedPath = movedNodes.map(function (n) {
+	        return moveNode(n.loc);
+	      });
+	      var unmovedNodes = graph.childNodes(graph.entity(obj.unmovedId));
+	      var unmovedPath = unmovedNodes.map(function (n) {
+	        return projection(n.loc);
+	      });
+	      var hits = geoPathIntersections(movedPath, unmovedPath);
 
-	function toNum(low, high, isSigned) {
-	    if (isSigned) {
-	        return high * 0x100000000 + (low >>> 0);
+	      for (var j = 0; i < hits.length; i++) {
+	        if (geoVecEqual(hits[j], end)) continue;
+	        var edge = geoChooseEdge(unmovedNodes, end, projection);
+	        _delta = geoVecSubtract(projection(edge.loc), start);
+	      }
 	    }
+	  }
 
-	    return ((high >>> 0) * 0x100000000) + (low >>> 0);
-	}
-
-	function writeBigVarint(val, pbf) {
-	    var low, high;
+	  var action = function action(graph) {
+	    if (_delta[0] === 0 && _delta[1] === 0) return graph;
+	    setupCache(graph);
 
-	    if (val >= 0) {
-	        low  = (val % 0x100000000) | 0;
-	        high = (val / 0x100000000) | 0;
-	    } else {
-	        low  = ~(-val % 0x100000000);
-	        high = ~(-val / 0x100000000);
+	    if (cache.intersections.length) {
+	      limitDelta(graph);
+	    }
 
-	        if (low ^ 0xffffffff) {
-	            low = (low + 1) | 0;
-	        } else {
-	            low = 0;
-	            high = (high + 1) | 0;
-	        }
+	    for (var i = 0; i < cache.nodes.length; i++) {
+	      var node = graph.entity(cache.nodes[i]);
+	      var start = projection(node.loc);
+	      var end = geoVecAdd(start, _delta);
+	      graph = graph.replace(node.move(projection.invert(end)));
 	    }
 
-	    if (val >= 0x10000000000000000 || val < -0x10000000000000000) {
-	        throw new Error('Given varint doesn\'t fit into 10 bytes');
+	    if (cache.intersections.length) {
+	      graph = cleanupIntersections(graph);
 	    }
 
-	    pbf.realloc(10);
+	    return graph;
+	  };
+
+	  action.delta = function () {
+	    return _delta;
+	  };
 
-	    writeBigVarintLow(low, high, pbf);
-	    writeBigVarintHigh(high, pbf);
+	  return action;
 	}
 
-	function writeBigVarintLow(low, high, pbf) {
-	    pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;
-	    pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;
-	    pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;
-	    pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;
-	    pbf.buf[pbf.pos]   = low & 0x7f;
+	function actionMoveMember(relationId, fromIndex, toIndex) {
+	  return function (graph) {
+	    return graph.replace(graph.entity(relationId).moveMember(fromIndex, toIndex));
+	  };
 	}
 
-	function writeBigVarintHigh(high, pbf) {
-	    var lsb = (high & 0x07) << 4;
+	function actionMoveNode(nodeID, toLoc) {
+	  var action = function action(graph, t) {
+	    if (t === null || !isFinite(t)) t = 1;
+	    t = Math.min(Math.max(+t, 0), 1);
+	    var node = graph.entity(nodeID);
+	    return graph.replace(node.move(geoVecInterp(node.loc, toLoc, t)));
+	  };
 
-	    pbf.buf[pbf.pos++] |= lsb         | ((high >>>= 3) ? 0x80 : 0); if (!high) { return; }
-	    pbf.buf[pbf.pos++]  = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) { return; }
-	    pbf.buf[pbf.pos++]  = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) { return; }
-	    pbf.buf[pbf.pos++]  = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) { return; }
-	    pbf.buf[pbf.pos++]  = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) { return; }
-	    pbf.buf[pbf.pos++]  = high & 0x7f;
+	  action.transitionable = true;
+	  return action;
 	}
 
-	function makeRoomForExtraLength(startPos, len, pbf) {
-	    var extraLen =
-	        len <= 0x3fff ? 1 :
-	        len <= 0x1fffff ? 2 :
-	        len <= 0xfffffff ? 3 : Math.floor(Math.log(len) / (Math.LN2 * 7));
-
-	    // if 1 byte isn't enough for encoding message length, shift the data to the right
-	    pbf.realloc(extraLen);
-	    for (var i = pbf.pos - 1; i >= startPos; i--) { pbf.buf[i + extraLen] = pbf.buf[i]; }
+	function actionNoop() {
+	  return function (graph) {
+	    return graph;
+	  };
 	}
 
-	function writePackedVarint(arr, pbf)   { for (var i = 0; i < arr.length; i++) { pbf.writeVarint(arr[i]); }   }
-	function writePackedSVarint(arr, pbf)  { for (var i = 0; i < arr.length; i++) { pbf.writeSVarint(arr[i]); }  }
-	function writePackedFloat(arr, pbf)    { for (var i = 0; i < arr.length; i++) { pbf.writeFloat(arr[i]); }    }
-	function writePackedDouble(arr, pbf)   { for (var i = 0; i < arr.length; i++) { pbf.writeDouble(arr[i]); }   }
-	function writePackedBoolean(arr, pbf)  { for (var i = 0; i < arr.length; i++) { pbf.writeBoolean(arr[i]); }  }
-	function writePackedFixed32(arr, pbf)  { for (var i = 0; i < arr.length; i++) { pbf.writeFixed32(arr[i]); }  }
-	function writePackedSFixed32(arr, pbf) { for (var i = 0; i < arr.length; i++) { pbf.writeSFixed32(arr[i]); } }
-	function writePackedFixed64(arr, pbf)  { for (var i = 0; i < arr.length; i++) { pbf.writeFixed64(arr[i]); }  }
-	function writePackedSFixed64(arr, pbf) { for (var i = 0; i < arr.length; i++) { pbf.writeSFixed64(arr[i]); } }
+	function actionOrthogonalize(wayID, projection, vertexID, degThresh, ep) {
+	  var epsilon = ep || 1e-4;
+	  var threshold = degThresh || 13; // degrees within right or straight to alter
+	  // We test normalized dot products so we can compare as cos(angle)
 
-	// Buffer code below from https://github.com/feross/buffer, MIT-licensed
+	  var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
+	  var upperThreshold = Math.cos(threshold * Math.PI / 180);
 
-	function readUInt32(buf, pos) {
-	    return ((buf[pos]) |
-	        (buf[pos + 1] << 8) |
-	        (buf[pos + 2] << 16)) +
-	        (buf[pos + 3] * 0x1000000);
-	}
+	  var action = function action(graph, t) {
+	    if (t === null || !isFinite(t)) t = 1;
+	    t = Math.min(Math.max(+t, 0), 1);
+	    var way = graph.entity(wayID);
+	    way = way.removeNode(''); // sanity check - remove any consecutive duplicates
 
-	function writeInt32(buf, val, pos) {
-	    buf[pos] = val;
-	    buf[pos + 1] = (val >>> 8);
-	    buf[pos + 2] = (val >>> 16);
-	    buf[pos + 3] = (val >>> 24);
-	}
+	    if (way.tags.nonsquare) {
+	      var tags = Object.assign({}, way.tags); // since we're squaring, remove indication that this is physically unsquare
 
-	function readInt32(buf, pos) {
-	    return ((buf[pos]) |
-	        (buf[pos + 1] << 8) |
-	        (buf[pos + 2] << 16)) +
-	        (buf[pos + 3] << 24);
-	}
+	      delete tags.nonsquare;
+	      way = way.update({
+	        tags: tags
+	      });
+	    }
 
-	function readUtf8(buf, pos, end) {
-	    var str = '';
-	    var i = pos;
+	    graph = graph.replace(way);
+	    var isClosed = way.isClosed();
+	    var nodes = graph.childNodes(way).slice(); // shallow copy
 
-	    while (i < end) {
-	        var b0 = buf[i];
-	        var c = null; // codepoint
-	        var bytesPerSequence =
-	            b0 > 0xEF ? 4 :
-	            b0 > 0xDF ? 3 :
-	            b0 > 0xBF ? 2 : 1;
+	    if (isClosed) nodes.pop();
 
-	        if (i + bytesPerSequence > end) { break; }
+	    if (vertexID !== undefined) {
+	      nodes = nodeSubset(nodes, vertexID, isClosed);
+	      if (nodes.length !== 3) return graph;
+	    } // note: all geometry functions here use the unclosed node/point/coord list
 
-	        var b1, b2, b3;
 
-	        if (bytesPerSequence === 1) {
-	            if (b0 < 0x80) {
-	                c = b0;
-	            }
-	        } else if (bytesPerSequence === 2) {
-	            b1 = buf[i + 1];
-	            if ((b1 & 0xC0) === 0x80) {
-	                c = (b0 & 0x1F) << 0x6 | (b1 & 0x3F);
-	                if (c <= 0x7F) {
-	                    c = null;
-	                }
-	            }
-	        } else if (bytesPerSequence === 3) {
-	            b1 = buf[i + 1];
-	            b2 = buf[i + 2];
-	            if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80) {
-	                c = (b0 & 0xF) << 0xC | (b1 & 0x3F) << 0x6 | (b2 & 0x3F);
-	                if (c <= 0x7FF || (c >= 0xD800 && c <= 0xDFFF)) {
-	                    c = null;
-	                }
-	            }
-	        } else if (bytesPerSequence === 4) {
-	            b1 = buf[i + 1];
-	            b2 = buf[i + 2];
-	            b3 = buf[i + 3];
-	            if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80 && (b3 & 0xC0) === 0x80) {
-	                c = (b0 & 0xF) << 0x12 | (b1 & 0x3F) << 0xC | (b2 & 0x3F) << 0x6 | (b3 & 0x3F);
-	                if (c <= 0xFFFF || c >= 0x110000) {
-	                    c = null;
-	                }
-	            }
-	        }
+	    var nodeCount = {};
+	    var points = [];
+	    var corner = {
+	      i: 0,
+	      dotp: 1
+	    };
+	    var node, point, loc, score, motions, i, j;
+
+	    for (i = 0; i < nodes.length; i++) {
+	      node = nodes[i];
+	      nodeCount[node.id] = (nodeCount[node.id] || 0) + 1;
+	      points.push({
+	        id: node.id,
+	        coord: projection(node.loc)
+	      });
+	    }
 
-	        if (c === null) {
-	            c = 0xFFFD;
-	            bytesPerSequence = 1;
+	    if (points.length === 3) {
+	      // move only one vertex for right triangle
+	      for (i = 0; i < 1000; i++) {
+	        motions = points.map(calcMotion);
+	        points[corner.i].coord = geoVecAdd(points[corner.i].coord, motions[corner.i]);
+	        score = corner.dotp;
 
-	        } else if (c > 0xFFFF) {
-	            c -= 0x10000;
-	            str += String.fromCharCode(c >>> 10 & 0x3FF | 0xD800);
-	            c = 0xDC00 | c & 0x3FF;
+	        if (score < epsilon) {
+	          break;
 	        }
+	      }
 
-	        str += String.fromCharCode(c);
-	        i += bytesPerSequence;
-	    }
-
-	    return str;
-	}
+	      node = graph.entity(nodes[corner.i].id);
+	      loc = projection.invert(points[corner.i].coord);
+	      graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
+	    } else {
+	      var straights = [];
+	      var simplified = []; // Remove points from nearly straight sections..
+	      // This produces a simplified shape to orthogonalize
 
-	function readUtf8TextDecoder(buf, pos, end) {
-	    return utf8TextDecoder.decode(buf.subarray(pos, end));
-	}
+	      for (i = 0; i < points.length; i++) {
+	        point = points[i];
+	        var dotp = 0;
 
-	function writeUtf8(buf, str, pos) {
-	    for (var i = 0, c, lead; i < str.length; i++) {
-	        c = str.charCodeAt(i); // code point
-
-	        if (c > 0xD7FF && c < 0xE000) {
-	            if (lead) {
-	                if (c < 0xDC00) {
-	                    buf[pos++] = 0xEF;
-	                    buf[pos++] = 0xBF;
-	                    buf[pos++] = 0xBD;
-	                    lead = c;
-	                    continue;
-	                } else {
-	                    c = lead - 0xD800 << 10 | c - 0xDC00 | 0x10000;
-	                    lead = null;
-	                }
-	            } else {
-	                if (c > 0xDBFF || (i + 1 === str.length)) {
-	                    buf[pos++] = 0xEF;
-	                    buf[pos++] = 0xBF;
-	                    buf[pos++] = 0xBD;
-	                } else {
-	                    lead = c;
-	                }
-	                continue;
-	            }
-	        } else if (lead) {
-	            buf[pos++] = 0xEF;
-	            buf[pos++] = 0xBF;
-	            buf[pos++] = 0xBD;
-	            lead = null;
+	        if (isClosed || i > 0 && i < points.length - 1) {
+	          var a = points[(i - 1 + points.length) % points.length];
+	          var b = points[(i + 1) % points.length];
+	          dotp = Math.abs(geoOrthoNormalizedDotProduct(a.coord, b.coord, point.coord));
 	        }
 
-	        if (c < 0x80) {
-	            buf[pos++] = c;
+	        if (dotp > upperThreshold) {
+	          straights.push(point);
 	        } else {
-	            if (c < 0x800) {
-	                buf[pos++] = c >> 0x6 | 0xC0;
-	            } else {
-	                if (c < 0x10000) {
-	                    buf[pos++] = c >> 0xC | 0xE0;
-	                } else {
-	                    buf[pos++] = c >> 0x12 | 0xF0;
-	                    buf[pos++] = c >> 0xC & 0x3F | 0x80;
-	                }
-	                buf[pos++] = c >> 0x6 & 0x3F | 0x80;
-	            }
-	            buf[pos++] = c & 0x3F | 0x80;
+	          simplified.push(point);
 	        }
-	    }
-	    return pos;
-	}
-
-	var pointGeometry = Point;
-
-	/**
-	 * A standalone point geometry with useful accessor, comparison, and
-	 * modification methods.
-	 *
-	 * @class Point
-	 * @param {Number} x the x-coordinate. this could be longitude or screen
-	 * pixels, or any other sort of unit.
-	 * @param {Number} y the y-coordinate. this could be latitude or screen
-	 * pixels, or any other sort of unit.
-	 * @example
-	 * var point = new Point(-77, 38);
-	 */
-	function Point(x, y) {
-	    this.x = x;
-	    this.y = y;
-	}
-
-	Point.prototype = {
-
-	    /**
-	     * Clone this point, returning a new point that can be modified
-	     * without affecting the old one.
-	     * @return {Point} the clone
-	     */
-	    clone: function() { return new Point(this.x, this.y); },
-
-	    /**
-	     * Add this point's x & y coordinates to another point,
-	     * yielding a new point.
-	     * @param {Point} p the other point
-	     * @return {Point} output point
-	     */
-	    add:     function(p) { return this.clone()._add(p); },
-
-	    /**
-	     * Subtract this point's x & y coordinates to from point,
-	     * yielding a new point.
-	     * @param {Point} p the other point
-	     * @return {Point} output point
-	     */
-	    sub:     function(p) { return this.clone()._sub(p); },
-
-	    /**
-	     * Multiply this point's x & y coordinates by point,
-	     * yielding a new point.
-	     * @param {Point} p the other point
-	     * @return {Point} output point
-	     */
-	    multByPoint:    function(p) { return this.clone()._multByPoint(p); },
+	      } // Orthogonalize the simplified shape
 
-	    /**
-	     * Divide this point's x & y coordinates by point,
-	     * yielding a new point.
-	     * @param {Point} p the other point
-	     * @return {Point} output point
-	     */
-	    divByPoint:     function(p) { return this.clone()._divByPoint(p); },
 
-	    /**
-	     * Multiply this point's x & y coordinates by a factor,
-	     * yielding a new point.
-	     * @param {Point} k factor
-	     * @return {Point} output point
-	     */
-	    mult:    function(k) { return this.clone()._mult(k); },
+	      var bestPoints = clonePoints(simplified);
+	      var originalPoints = clonePoints(simplified);
+	      score = Infinity;
 
-	    /**
-	     * Divide this point's x & y coordinates by a factor,
-	     * yielding a new point.
-	     * @param {Point} k factor
-	     * @return {Point} output point
-	     */
-	    div:     function(k) { return this.clone()._div(k); },
+	      for (i = 0; i < 1000; i++) {
+	        motions = simplified.map(calcMotion);
 
-	    /**
-	     * Rotate this point around the 0, 0 origin by an angle a,
-	     * given in radians
-	     * @param {Number} a angle to rotate around, in radians
-	     * @return {Point} output point
-	     */
-	    rotate:  function(a) { return this.clone()._rotate(a); },
+	        for (j = 0; j < motions.length; j++) {
+	          simplified[j].coord = geoVecAdd(simplified[j].coord, motions[j]);
+	        }
 
-	    /**
-	     * Rotate this point around p point by an angle a,
-	     * given in radians
-	     * @param {Number} a angle to rotate around, in radians
-	     * @param {Point} p Point to rotate around
-	     * @return {Point} output point
-	     */
-	    rotateAround:  function(a,p) { return this.clone()._rotateAround(a,p); },
+	        var newScore = geoOrthoCalcScore(simplified, isClosed, epsilon, threshold);
 
-	    /**
-	     * Multiply this point by a 4x1 transformation matrix
-	     * @param {Array<Number>} m transformation matrix
-	     * @return {Point} output point
-	     */
-	    matMult: function(m) { return this.clone()._matMult(m); },
+	        if (newScore < score) {
+	          bestPoints = clonePoints(simplified);
+	          score = newScore;
+	        }
 
-	    /**
-	     * Calculate this point but as a unit vector from 0, 0, meaning
-	     * that the distance from the resulting point to the 0, 0
-	     * coordinate will be equal to 1 and the angle from the resulting
-	     * point to the 0, 0 coordinate will be the same as before.
-	     * @return {Point} unit vector point
-	     */
-	    unit:    function() { return this.clone()._unit(); },
+	        if (score < epsilon) {
+	          break;
+	        }
+	      }
 
-	    /**
-	     * Compute a perpendicular point, where the new y coordinate
-	     * is the old x coordinate and the new x coordinate is the old y
-	     * coordinate multiplied by -1
-	     * @return {Point} perpendicular point
-	     */
-	    perp:    function() { return this.clone()._perp(); },
+	      var bestCoords = bestPoints.map(function (p) {
+	        return p.coord;
+	      });
+	      if (isClosed) bestCoords.push(bestCoords[0]); // move the nodes that should move
 
-	    /**
-	     * Return a version of this point with the x & y coordinates
-	     * rounded to integers.
-	     * @return {Point} rounded point
-	     */
-	    round:   function() { return this.clone()._round(); },
+	      for (i = 0; i < bestPoints.length; i++) {
+	        point = bestPoints[i];
 
-	    /**
-	     * Return the magitude of this point: this is the Euclidean
-	     * distance from the 0, 0 coordinate to this point's x and y
-	     * coordinates.
-	     * @return {Number} magnitude
-	     */
-	    mag: function() {
-	        return Math.sqrt(this.x * this.x + this.y * this.y);
-	    },
+	        if (!geoVecEqual(originalPoints[i].coord, point.coord)) {
+	          node = graph.entity(point.id);
+	          loc = projection.invert(point.coord);
+	          graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
+	        }
+	      } // move the nodes along straight segments
 
-	    /**
-	     * Judge whether this point is equal to another point, returning
-	     * true or false.
-	     * @param {Point} other the other point
-	     * @return {boolean} whether the points are equal
-	     */
-	    equals: function(other) {
-	        return this.x === other.x &&
-	               this.y === other.y;
-	    },
 
-	    /**
-	     * Calculate the distance from this point to another point
-	     * @param {Point} p the other point
-	     * @return {Number} distance
-	     */
-	    dist: function(p) {
-	        return Math.sqrt(this.distSqr(p));
-	    },
+	      for (i = 0; i < straights.length; i++) {
+	        point = straights[i];
+	        if (nodeCount[point.id] > 1) continue; // skip self-intersections
 
-	    /**
-	     * Calculate the distance from this point to another point,
-	     * without the square root step. Useful if you're comparing
-	     * relative distances.
-	     * @param {Point} p the other point
-	     * @return {Number} distance
-	     */
-	    distSqr: function(p) {
-	        var dx = p.x - this.x,
-	            dy = p.y - this.y;
-	        return dx * dx + dy * dy;
-	    },
+	        node = graph.entity(point.id);
 
-	    /**
-	     * Get the angle from the 0, 0 coordinate to this point, in radians
-	     * coordinates.
-	     * @return {Number} angle
-	     */
-	    angle: function() {
-	        return Math.atan2(this.y, this.x);
-	    },
+	        if (t === 1 && graph.parentWays(node).length === 1 && graph.parentRelations(node).length === 0 && !node.hasInterestingTags()) {
+	          // remove uninteresting points..
+	          graph = actionDeleteNode(node.id)(graph);
+	        } else {
+	          // move interesting points to the nearest edge..
+	          var choice = geoVecProject(point.coord, bestCoords);
 
-	    /**
-	     * Get the angle from this point to another point, in radians
-	     * @param {Point} b the other point
-	     * @return {Number} angle
-	     */
-	    angleTo: function(b) {
-	        return Math.atan2(this.y - b.y, this.x - b.x);
-	    },
+	          if (choice) {
+	            loc = projection.invert(choice.target);
+	            graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
+	          }
+	        }
+	      }
+	    }
 
-	    /**
-	     * Get the angle between this point and another point, in radians
-	     * @param {Point} b the other point
-	     * @return {Number} angle
-	     */
-	    angleWith: function(b) {
-	        return this.angleWithSep(b.x, b.y);
-	    },
+	    return graph;
 
-	    /*
-	     * Find the angle of the two vectors, solving the formula for
-	     * the cross product a x b = |a||b|sin(θ) for θ.
-	     * @param {Number} x the x-coordinate
-	     * @param {Number} y the y-coordinate
-	     * @return {Number} the angle in radians
-	     */
-	    angleWithSep: function(x, y) {
-	        return Math.atan2(
-	            this.x * y - this.y * x,
-	            this.x * x + this.y * y);
-	    },
+	    function clonePoints(array) {
+	      return array.map(function (p) {
+	        return {
+	          id: p.id,
+	          coord: [p.coord[0], p.coord[1]]
+	        };
+	      });
+	    }
 
-	    _matMult: function(m) {
-	        var x = m[0] * this.x + m[1] * this.y,
-	            y = m[2] * this.x + m[3] * this.y;
-	        this.x = x;
-	        this.y = y;
-	        return this;
-	    },
+	    function calcMotion(point, i, array) {
+	      // don't try to move the endpoints of a non-closed way.
+	      if (!isClosed && (i === 0 || i === array.length - 1)) return [0, 0]; // don't try to move a node that appears more than once (self intersection)
+
+	      if (nodeCount[array[i].id] > 1) return [0, 0];
+	      var a = array[(i - 1 + array.length) % array.length].coord;
+	      var origin = point.coord;
+	      var b = array[(i + 1) % array.length].coord;
+	      var p = geoVecSubtract(a, origin);
+	      var q = geoVecSubtract(b, origin);
+	      var scale = 2 * Math.min(geoVecLength(p), geoVecLength(q));
+	      p = geoVecNormalize(p);
+	      q = geoVecNormalize(q);
+	      var dotp = p[0] * q[0] + p[1] * q[1];
+	      var val = Math.abs(dotp);
+
+	      if (val < lowerThreshold) {
+	        // nearly orthogonal
+	        corner.i = i;
+	        corner.dotp = val;
+	        var vec = geoVecNormalize(geoVecAdd(p, q));
+	        return geoVecScale(vec, 0.1 * dotp * scale);
+	      }
 
-	    _add: function(p) {
-	        this.x += p.x;
-	        this.y += p.y;
-	        return this;
-	    },
+	      return [0, 0]; // do nothing
+	    }
+	  }; // if we are only orthogonalizing one vertex,
+	  // get that vertex and the previous and next
 
-	    _sub: function(p) {
-	        this.x -= p.x;
-	        this.y -= p.y;
-	        return this;
-	    },
 
-	    _mult: function(k) {
-	        this.x *= k;
-	        this.y *= k;
-	        return this;
-	    },
+	  function nodeSubset(nodes, vertexID, isClosed) {
+	    var first = isClosed ? 0 : 1;
+	    var last = isClosed ? nodes.length : nodes.length - 1;
 
-	    _div: function(k) {
-	        this.x /= k;
-	        this.y /= k;
-	        return this;
-	    },
+	    for (var i = first; i < last; i++) {
+	      if (nodes[i].id === vertexID) {
+	        return [nodes[(i - 1 + nodes.length) % nodes.length], nodes[i], nodes[(i + 1) % nodes.length]];
+	      }
+	    }
 
-	    _multByPoint: function(p) {
-	        this.x *= p.x;
-	        this.y *= p.y;
-	        return this;
-	    },
+	    return [];
+	  }
 
-	    _divByPoint: function(p) {
-	        this.x /= p.x;
-	        this.y /= p.y;
-	        return this;
-	    },
+	  action.disabled = function (graph) {
+	    var way = graph.entity(wayID);
+	    way = way.removeNode(''); // sanity check - remove any consecutive duplicates
 
-	    _unit: function() {
-	        this._div(this.mag());
-	        return this;
-	    },
+	    graph = graph.replace(way);
+	    var isClosed = way.isClosed();
+	    var nodes = graph.childNodes(way).slice(); // shallow copy
 
-	    _perp: function() {
-	        var y = this.y;
-	        this.y = this.x;
-	        this.x = -y;
-	        return this;
-	    },
+	    if (isClosed) nodes.pop();
+	    var allowStraightAngles = false;
 
-	    _rotate: function(angle) {
-	        var cos = Math.cos(angle),
-	            sin = Math.sin(angle),
-	            x = cos * this.x - sin * this.y,
-	            y = sin * this.x + cos * this.y;
-	        this.x = x;
-	        this.y = y;
-	        return this;
-	    },
+	    if (vertexID !== undefined) {
+	      allowStraightAngles = true;
+	      nodes = nodeSubset(nodes, vertexID, isClosed);
+	      if (nodes.length !== 3) return 'end_vertex';
+	    }
 
-	    _rotateAround: function(angle, p) {
-	        var cos = Math.cos(angle),
-	            sin = Math.sin(angle),
-	            x = p.x + cos * (this.x - p.x) - sin * (this.y - p.y),
-	            y = p.y + sin * (this.x - p.x) + cos * (this.y - p.y);
-	        this.x = x;
-	        this.y = y;
-	        return this;
-	    },
+	    var coords = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var score = geoOrthoCanOrthogonalize(coords, isClosed, epsilon, threshold, allowStraightAngles);
 
-	    _round: function() {
-	        this.x = Math.round(this.x);
-	        this.y = Math.round(this.y);
-	        return this;
+	    if (score === null) {
+	      return 'not_squarish';
+	    } else if (score === 0) {
+	      return 'square_enough';
+	    } else {
+	      return false;
 	    }
-	};
+	  };
 
-	/**
-	 * Construct a point from an array if necessary, otherwise if the input
-	 * is already a Point, or an unknown type, return it unchanged
-	 * @param {Array<Number>|Point|*} a any kind of input value
-	 * @return {Point} constructed point, or passed-through value.
-	 * @example
-	 * // this
-	 * var point = Point.convert([0, 1]);
-	 * // is equivalent to
-	 * var point = new Point(0, 1);
-	 */
-	Point.convert = function (a) {
-	    if (a instanceof Point) {
-	        return a;
+	  action.transitionable = true;
+	  return action;
+	}
+
+	//
+	// `turn` must be an `osmTurn` object
+	// see osm/intersection.js, pathToTurn()
+	//
+	// This specifies a restriction of type `restriction` when traveling from
+	// `turn.from.way` toward `turn.to.way` via `turn.via.node` OR `turn.via.ways`.
+	// (The action does not check that these entities form a valid intersection.)
+	//
+	// From, to, and via ways should be split before calling this action.
+	// (old versions of the code would split the ways here, but we no longer do it)
+	//
+	// For testing convenience, accepts a restrictionID to assign to the new
+	// relation. Normally, this will be undefined and the relation will
+	// automatically be assigned a new ID.
+	//
+
+	function actionRestrictTurn(turn, restrictionType, restrictionID) {
+	  return function (graph) {
+	    var fromWay = graph.entity(turn.from.way);
+	    var toWay = graph.entity(turn.to.way);
+	    var viaNode = turn.via.node && graph.entity(turn.via.node);
+	    var viaWays = turn.via.ways && turn.via.ways.map(function (id) {
+	      return graph.entity(id);
+	    });
+	    var members = [];
+	    members.push({
+	      id: fromWay.id,
+	      type: 'way',
+	      role: 'from'
+	    });
+
+	    if (viaNode) {
+	      members.push({
+	        id: viaNode.id,
+	        type: 'node',
+	        role: 'via'
+	      });
+	    } else if (viaWays) {
+	      viaWays.forEach(function (viaWay) {
+	        members.push({
+	          id: viaWay.id,
+	          type: 'way',
+	          role: 'via'
+	        });
+	      });
 	    }
-	    if (Array.isArray(a)) {
-	        return new Point(a[0], a[1]);
+
+	    members.push({
+	      id: toWay.id,
+	      type: 'way',
+	      role: 'to'
+	    });
+	    return graph.replace(osmRelation({
+	      id: restrictionID,
+	      tags: {
+	        type: 'restriction',
+	        restriction: restrictionType
+	      },
+	      members: members
+	    }));
+	  };
+	}
+
+	function actionRevert(id) {
+	  var action = function action(graph) {
+	    var entity = graph.hasEntity(id),
+	        base = graph.base().entities[id];
+
+	    if (entity && !base) {
+	      // entity will be removed..
+	      if (entity.type === 'node') {
+	        graph.parentWays(entity).forEach(function (parent) {
+	          parent = parent.removeNode(id);
+	          graph = graph.replace(parent);
+
+	          if (parent.isDegenerate()) {
+	            graph = actionDeleteWay(parent.id)(graph);
+	          }
+	        });
+	      }
+
+	      graph.parentRelations(entity).forEach(function (parent) {
+	        parent = parent.removeMembersWithID(id);
+	        graph = graph.replace(parent);
+
+	        if (parent.isDegenerate()) {
+	          graph = actionDeleteRelation(parent.id)(graph);
+	        }
+	      });
 	    }
-	    return a;
-	};
 
-	var vectortilefeature = VectorTileFeature;
+	    return graph.revert(id);
+	  };
 
-	function VectorTileFeature(pbf, end, extent, keys, values) {
-	    // Public
-	    this.properties = {};
-	    this.extent = extent;
-	    this.type = 0;
+	  return action;
+	}
 
-	    // Private
-	    this._pbf = pbf;
-	    this._geometry = -1;
-	    this._keys = keys;
-	    this._values = values;
+	function actionRotate(rotateIds, pivot, angle, projection) {
+	  var action = function action(graph) {
+	    return graph.update(function (graph) {
+	      utilGetAllNodes(rotateIds, graph).forEach(function (node) {
+	        var point = geoRotate([projection(node.loc)], angle, pivot)[0];
+	        graph = graph.replace(node.move(projection.invert(point)));
+	      });
+	    });
+	  };
 
-	    pbf.readFields(readFeature, this, end);
+	  return action;
 	}
 
-	function readFeature(tag, feature, pbf) {
-	    if (tag == 1) { feature.id = pbf.readVarint(); }
-	    else if (tag == 2) { readTag(pbf, feature); }
-	    else if (tag == 3) { feature.type = pbf.readVarint(); }
-	    else if (tag == 4) { feature._geometry = pbf.pos; }
+	function actionScale(ids, pivotLoc, scaleFactor, projection) {
+	  return function (graph) {
+	    return graph.update(function (graph) {
+	      var point, radial;
+	      utilGetAllNodes(ids, graph).forEach(function (node) {
+	        point = projection(node.loc);
+	        radial = [point[0] - pivotLoc[0], point[1] - pivotLoc[1]];
+	        point = [pivotLoc[0] + scaleFactor * radial[0], pivotLoc[1] + scaleFactor * radial[1]];
+	        graph = graph.replace(node.move(projection.invert(point)));
+	      });
+	    });
+	  };
 	}
 
-	function readTag(pbf, feature) {
-	    var end = pbf.readVarint() + pbf.pos;
+	/* Align nodes along their common axis */
 
-	    while (pbf.pos < end) {
-	        var key = feature._keys[pbf.readVarint()],
-	            value = feature._values[pbf.readVarint()];
-	        feature.properties[key] = value;
-	    }
-	}
+	function actionStraightenNodes(nodeIDs, projection) {
+	  function positionAlongWay(a, o, b) {
+	    return geoVecDot(a, b, o) / geoVecDot(b, b, o);
+	  } // returns the endpoints of the long axis of symmetry of the `points` bounding rect
 
-	VectorTileFeature.types = ['Unknown', 'Point', 'LineString', 'Polygon'];
 
-	VectorTileFeature.prototype.loadGeometry = function() {
-	    var pbf = this._pbf;
-	    pbf.pos = this._geometry;
+	  function getEndpoints(points) {
+	    var ssr = geoGetSmallestSurroundingRectangle(points); // Choose line pq = axis of symmetry.
+	    // The shape's surrounding rectangle has 2 axes of symmetry.
+	    // Snap points to the long axis
 
-	    var end = pbf.readVarint() + pbf.pos,
-	        cmd = 1,
-	        length = 0,
-	        x = 0,
-	        y = 0,
-	        lines = [],
-	        line;
+	    var p1 = [(ssr.poly[0][0] + ssr.poly[1][0]) / 2, (ssr.poly[0][1] + ssr.poly[1][1]) / 2];
+	    var q1 = [(ssr.poly[2][0] + ssr.poly[3][0]) / 2, (ssr.poly[2][1] + ssr.poly[3][1]) / 2];
+	    var p2 = [(ssr.poly[3][0] + ssr.poly[4][0]) / 2, (ssr.poly[3][1] + ssr.poly[4][1]) / 2];
+	    var q2 = [(ssr.poly[1][0] + ssr.poly[2][0]) / 2, (ssr.poly[1][1] + ssr.poly[2][1]) / 2];
+	    var isLong = geoVecLength(p1, q1) > geoVecLength(p2, q2);
 
-	    while (pbf.pos < end) {
-	        if (length <= 0) {
-	            var cmdLen = pbf.readVarint();
-	            cmd = cmdLen & 0x7;
-	            length = cmdLen >> 3;
-	        }
+	    if (isLong) {
+	      return [p1, q1];
+	    }
 
-	        length--;
+	    return [p2, q2];
+	  }
 
-	        if (cmd === 1 || cmd === 2) {
-	            x += pbf.readSVarint();
-	            y += pbf.readSVarint();
+	  var action = function action(graph, t) {
+	    if (t === null || !isFinite(t)) t = 1;
+	    t = Math.min(Math.max(+t, 0), 1);
+	    var nodes = nodeIDs.map(function (id) {
+	      return graph.entity(id);
+	    });
+	    var points = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var endpoints = getEndpoints(points);
+	    var startPoint = endpoints[0];
+	    var endPoint = endpoints[1]; // Move points onto the line connecting the endpoints
 
-	            if (cmd === 1) { // moveTo
-	                if (line) { lines.push(line); }
-	                line = [];
-	            }
+	    for (var i = 0; i < points.length; i++) {
+	      var node = nodes[i];
+	      var point = points[i];
+	      var u = positionAlongWay(point, startPoint, endPoint);
+	      var point2 = geoVecInterp(startPoint, endPoint, u);
+	      var loc2 = projection.invert(point2);
+	      graph = graph.replace(node.move(geoVecInterp(node.loc, loc2, t)));
+	    }
 
-	            line.push(new pointGeometry(x, y));
+	    return graph;
+	  };
 
-	        } else if (cmd === 7) {
+	  action.disabled = function (graph) {
+	    var nodes = nodeIDs.map(function (id) {
+	      return graph.entity(id);
+	    });
+	    var points = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var endpoints = getEndpoints(points);
+	    var startPoint = endpoints[0];
+	    var endPoint = endpoints[1];
+	    var maxDistance = 0;
 
-	            // Workaround for https://github.com/mapbox/mapnik-vector-tile/issues/90
-	            if (line) {
-	                line.push(line[0].clone()); // closePolygon
-	            }
+	    for (var i = 0; i < points.length; i++) {
+	      var point = points[i];
+	      var u = positionAlongWay(point, startPoint, endPoint);
+	      var p = geoVecInterp(startPoint, endPoint, u);
+	      var dist = geoVecLength(p, point);
 
-	        } else {
-	            throw new Error('unknown command ' + cmd);
-	        }
+	      if (!isNaN(dist) && dist > maxDistance) {
+	        maxDistance = dist;
+	      }
+	    }
+
+	    if (maxDistance < 0.0001) {
+	      return 'straight_enough';
 	    }
+	  };
 
-	    if (line) { lines.push(line); }
+	  action.transitionable = true;
+	  return action;
+	}
 
-	    return lines;
-	};
+	/*
+	 * Based on https://github.com/openstreetmap/potlatch2/net/systemeD/potlatch2/tools/Straighten.as
+	 */
 
-	VectorTileFeature.prototype.bbox = function() {
-	    var pbf = this._pbf;
-	    pbf.pos = this._geometry;
+	function actionStraightenWay(selectedIDs, projection) {
+	  function positionAlongWay(a, o, b) {
+	    return geoVecDot(a, b, o) / geoVecDot(b, b, o);
+	  } // Return all selected ways as a continuous, ordered array of nodes
 
-	    var end = pbf.readVarint() + pbf.pos,
-	        cmd = 1,
-	        length = 0,
-	        x = 0,
-	        y = 0,
-	        x1 = Infinity,
-	        x2 = -Infinity,
-	        y1 = Infinity,
-	        y2 = -Infinity;
 
-	    while (pbf.pos < end) {
-	        if (length <= 0) {
-	            var cmdLen = pbf.readVarint();
-	            cmd = cmdLen & 0x7;
-	            length = cmdLen >> 3;
-	        }
+	  function allNodes(graph) {
+	    var nodes = [];
+	    var startNodes = [];
+	    var endNodes = [];
+	    var remainingWays = [];
+	    var selectedWays = selectedIDs.filter(function (w) {
+	      return graph.entity(w).type === 'way';
+	    });
+	    var selectedNodes = selectedIDs.filter(function (n) {
+	      return graph.entity(n).type === 'node';
+	    });
 
-	        length--;
+	    for (var i = 0; i < selectedWays.length; i++) {
+	      var way = graph.entity(selectedWays[i]);
+	      nodes = way.nodes.slice(0);
+	      remainingWays.push(nodes);
+	      startNodes.push(nodes[0]);
+	      endNodes.push(nodes[nodes.length - 1]);
+	    } // Remove duplicate end/startNodes (duplicate nodes cannot be at the line end,
+	    //   and need to be removed so currNode difference calculation below works)
+	    // i.e. ["n-1", "n-1", "n-2"] => ["n-2"]
 
-	        if (cmd === 1 || cmd === 2) {
-	            x += pbf.readSVarint();
-	            y += pbf.readSVarint();
-	            if (x < x1) { x1 = x; }
-	            if (x > x2) { x2 = x; }
-	            if (y < y1) { y1 = y; }
-	            if (y > y2) { y2 = y; }
 
-	        } else if (cmd !== 7) {
-	            throw new Error('unknown command ' + cmd);
-	        }
-	    }
+	    startNodes = startNodes.filter(function (n) {
+	      return startNodes.indexOf(n) === startNodes.lastIndexOf(n);
+	    });
+	    endNodes = endNodes.filter(function (n) {
+	      return endNodes.indexOf(n) === endNodes.lastIndexOf(n);
+	    }); // Choose the initial endpoint to start from
 
-	    return [x1, y1, x2, y2];
-	};
+	    var currNode = utilArrayDifference(startNodes, endNodes).concat(utilArrayDifference(endNodes, startNodes))[0];
+	    var nextWay = [];
+	    nodes = []; // Create nested function outside of loop to avoid "function in loop" lint error
 
-	VectorTileFeature.prototype.toGeoJSON = function(x, y, z) {
-	    var size = this.extent * Math.pow(2, z),
-	        x0 = this.extent * x,
-	        y0 = this.extent * y,
-	        coords = this.loadGeometry(),
-	        type = VectorTileFeature.types[this.type],
-	        i, j;
+	    var getNextWay = function getNextWay(currNode, remainingWays) {
+	      return remainingWays.filter(function (way) {
+	        return way[0] === currNode || way[way.length - 1] === currNode;
+	      })[0];
+	    }; // Add nodes to end of nodes array, until all ways are added
 
-	    function project(line) {
-	        for (var j = 0; j < line.length; j++) {
-	            var p = line[j], y2 = 180 - (p.y + y0) * 360 / size;
-	            line[j] = [
-	                (p.x + x0) * 360 / size - 180,
-	                360 / Math.PI * Math.atan(Math.exp(y2 * Math.PI / 180)) - 90
-	            ];
-	        }
+
+	    while (remainingWays.length) {
+	      nextWay = getNextWay(currNode, remainingWays);
+	      remainingWays = utilArrayDifference(remainingWays, [nextWay]);
+
+	      if (nextWay[0] !== currNode) {
+	        nextWay.reverse();
+	      }
+
+	      nodes = nodes.concat(nextWay);
+	      currNode = nodes[nodes.length - 1];
+	    } // If user selected 2 nodes to straighten between, then slice nodes array to those nodes
+
+
+	    if (selectedNodes.length === 2) {
+	      var startNodeIdx = nodes.indexOf(selectedNodes[0]);
+	      var endNodeIdx = nodes.indexOf(selectedNodes[1]);
+	      var sortedStartEnd = [startNodeIdx, endNodeIdx];
+	      sortedStartEnd.sort(function (a, b) {
+	        return a - b;
+	      });
+	      nodes = nodes.slice(sortedStartEnd[0], sortedStartEnd[1] + 1);
 	    }
 
-	    switch (this.type) {
-	    case 1:
-	        var points = [];
-	        for (i = 0; i < coords.length; i++) {
-	            points[i] = coords[i][0];
-	        }
-	        coords = points;
-	        project(coords);
-	        break;
+	    return nodes.map(function (n) {
+	      return graph.entity(n);
+	    });
+	  }
 
-	    case 2:
-	        for (i = 0; i < coords.length; i++) {
-	            project(coords[i]);
-	        }
-	        break;
+	  function shouldKeepNode(node, graph) {
+	    return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
+	  }
 
-	    case 3:
-	        coords = classifyRings(coords);
-	        for (i = 0; i < coords.length; i++) {
-	            for (j = 0; j < coords[i].length; j++) {
-	                project(coords[i][j]);
-	            }
+	  var action = function action(graph, t) {
+	    if (t === null || !isFinite(t)) t = 1;
+	    t = Math.min(Math.max(+t, 0), 1);
+	    var nodes = allNodes(graph);
+	    var points = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var startPoint = points[0];
+	    var endPoint = points[points.length - 1];
+	    var toDelete = [];
+	    var i;
+
+	    for (i = 1; i < points.length - 1; i++) {
+	      var node = nodes[i];
+	      var point = points[i];
+
+	      if (t < 1 || shouldKeepNode(node, graph)) {
+	        var u = positionAlongWay(point, startPoint, endPoint);
+	        var p = geoVecInterp(startPoint, endPoint, u);
+	        var loc2 = projection.invert(p);
+	        graph = graph.replace(node.move(geoVecInterp(node.loc, loc2, t)));
+	      } else {
+	        // safe to delete
+	        if (toDelete.indexOf(node) === -1) {
+	          toDelete.push(node);
 	        }
-	        break;
+	      }
 	    }
 
-	    if (coords.length === 1) {
-	        coords = coords[0];
-	    } else {
-	        type = 'Multi' + type;
+	    for (i = 0; i < toDelete.length; i++) {
+	      graph = actionDeleteNode(toDelete[i].id)(graph);
 	    }
 
-	    var result = {
-	        type: "Feature",
-	        geometry: {
-	            type: type,
-	            coordinates: coords
-	        },
-	        properties: this.properties
-	    };
+	    return graph;
+	  };
+
+	  action.disabled = function (graph) {
+	    // check way isn't too bendy
+	    var nodes = allNodes(graph);
+	    var points = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var startPoint = points[0];
+	    var endPoint = points[points.length - 1];
+	    var threshold = 0.2 * geoVecLength(startPoint, endPoint);
+	    var i;
 
-	    if ('id' in this) {
-	        result.id = this.id;
+	    if (threshold === 0) {
+	      return 'too_bendy';
 	    }
 
-	    return result;
-	};
+	    var maxDistance = 0;
 
-	// classifies an array of rings into polygons with outer rings and holes
+	    for (i = 1; i < points.length - 1; i++) {
+	      var point = points[i];
+	      var u = positionAlongWay(point, startPoint, endPoint);
+	      var p = geoVecInterp(startPoint, endPoint, u);
+	      var dist = geoVecLength(p, point); // to bendy if point is off by 20% of total start/end distance in projected space
 
-	function classifyRings(rings) {
-	    var len = rings.length;
+	      if (isNaN(dist) || dist > threshold) {
+	        return 'too_bendy';
+	      } else if (dist > maxDistance) {
+	        maxDistance = dist;
+	      }
+	    }
+
+	    var keepingAllNodes = nodes.every(function (node, i) {
+	      return i === 0 || i === nodes.length - 1 || shouldKeepNode(node, graph);
+	    });
 
-	    if (len <= 1) { return [rings]; }
+	    if (maxDistance < 0.0001 && // Allow straightening even if already straight in order to remove extraneous nodes
+	    keepingAllNodes) {
+	      return 'straight_enough';
+	    }
+	  };
 
-	    var polygons = [],
-	        polygon,
-	        ccw;
+	  action.transitionable = true;
+	  return action;
+	}
 
-	    for (var i = 0; i < len; i++) {
-	        var area = signedArea$1(rings[i]);
-	        if (area === 0) { continue; }
+	//
+	// `turn` must be an `osmTurn` object with a `restrictionID` property.
+	// see osm/intersection.js, pathToTurn()
+	//
 
-	        if (ccw === undefined) { ccw = area < 0; }
+	function actionUnrestrictTurn(turn) {
+	  return function (graph) {
+	    return actionDeleteRelation(turn.restrictionID)(graph);
+	  };
+	}
 
-	        if (ccw === area < 0) {
-	            if (polygon) { polygons.push(polygon); }
-	            polygon = [rings[i]];
+	/* Reflect the given area around its axis of symmetry */
 
-	        } else {
-	            polygon.push(rings[i]);
-	        }
-	    }
-	    if (polygon) { polygons.push(polygon); }
+	function actionReflect(reflectIds, projection) {
+	  var _useLongAxis = true;
+
+	  var action = function action(graph, t) {
+	    if (t === null || !isFinite(t)) t = 1;
+	    t = Math.min(Math.max(+t, 0), 1);
+	    var nodes = utilGetAllNodes(reflectIds, graph);
+	    var points = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var ssr = geoGetSmallestSurroundingRectangle(points); // Choose line pq = axis of symmetry.
+	    // The shape's surrounding rectangle has 2 axes of symmetry.
+	    // Reflect across the longer axis by default.
+
+	    var p1 = [(ssr.poly[0][0] + ssr.poly[1][0]) / 2, (ssr.poly[0][1] + ssr.poly[1][1]) / 2];
+	    var q1 = [(ssr.poly[2][0] + ssr.poly[3][0]) / 2, (ssr.poly[2][1] + ssr.poly[3][1]) / 2];
+	    var p2 = [(ssr.poly[3][0] + ssr.poly[4][0]) / 2, (ssr.poly[3][1] + ssr.poly[4][1]) / 2];
+	    var q2 = [(ssr.poly[1][0] + ssr.poly[2][0]) / 2, (ssr.poly[1][1] + ssr.poly[2][1]) / 2];
+	    var p, q;
+	    var isLong = geoVecLength(p1, q1) > geoVecLength(p2, q2);
+
+	    if (_useLongAxis && isLong || !_useLongAxis && !isLong) {
+	      p = p1;
+	      q = q1;
+	    } else {
+	      p = p2;
+	      q = q2;
+	    } // reflect c across pq
+	    // http://math.stackexchange.com/questions/65503/point-reflection-over-a-line
 
-	    return polygons;
-	}
 
-	function signedArea$1(ring) {
-	    var sum = 0;
-	    for (var i = 0, len = ring.length, j = len - 1, p1, p2; i < len; j = i++) {
-	        p1 = ring[i];
-	        p2 = ring[j];
-	        sum += (p2.x - p1.x) * (p1.y + p2.y);
+	    var dx = q[0] - p[0];
+	    var dy = q[1] - p[1];
+	    var a = (dx * dx - dy * dy) / (dx * dx + dy * dy);
+	    var b = 2 * dx * dy / (dx * dx + dy * dy);
+
+	    for (var i = 0; i < nodes.length; i++) {
+	      var node = nodes[i];
+	      var c = projection(node.loc);
+	      var c2 = [a * (c[0] - p[0]) + b * (c[1] - p[1]) + p[0], b * (c[0] - p[0]) - a * (c[1] - p[1]) + p[1]];
+	      var loc2 = projection.invert(c2);
+	      node = node.move(geoVecInterp(node.loc, loc2, t));
+	      graph = graph.replace(node);
 	    }
-	    return sum;
+
+	    return graph;
+	  };
+
+	  action.useLongAxis = function (val) {
+	    if (!arguments.length) return _useLongAxis;
+	    _useLongAxis = val;
+	    return action;
+	  };
+
+	  action.transitionable = true;
+	  return action;
 	}
 
-	var vectortilelayer = VectorTileLayer;
+	function actionUpgradeTags(entityId, oldTags, replaceTags) {
+	  return function (graph) {
+	    var entity = graph.entity(entityId);
+	    var tags = Object.assign({}, entity.tags); // shallow copy
 
-	function VectorTileLayer(pbf, end) {
-	    // Public
-	    this.version = 1;
-	    this.name = null;
-	    this.extent = 4096;
-	    this.length = 0;
+	    var transferValue;
+	    var semiIndex;
 
-	    // Private
-	    this._pbf = pbf;
-	    this._keys = [];
-	    this._values = [];
-	    this._features = [];
+	    for (var oldTagKey in oldTags) {
+	      if (!(oldTagKey in tags)) continue; // wildcard match
 
-	    pbf.readFields(readLayer, this, end);
+	      if (oldTags[oldTagKey] === '*') {
+	        // note the value since we might need to transfer it
+	        transferValue = tags[oldTagKey];
+	        delete tags[oldTagKey]; // exact match
+	      } else if (oldTags[oldTagKey] === tags[oldTagKey]) {
+	        delete tags[oldTagKey]; // match is within semicolon-delimited values
+	      } else {
+	        var vals = tags[oldTagKey].split(';').filter(Boolean);
+	        var oldIndex = vals.indexOf(oldTags[oldTagKey]);
 
-	    this.length = this._features.length;
-	}
+	        if (vals.length === 1 || oldIndex === -1) {
+	          delete tags[oldTagKey];
+	        } else {
+	          if (replaceTags && replaceTags[oldTagKey]) {
+	            // replacing a value within a semicolon-delimited value, note the index
+	            semiIndex = oldIndex;
+	          }
 
-	function readLayer(tag, layer, pbf) {
-	    if (tag === 15) { layer.version = pbf.readVarint(); }
-	    else if (tag === 1) { layer.name = pbf.readString(); }
-	    else if (tag === 5) { layer.extent = pbf.readVarint(); }
-	    else if (tag === 2) { layer._features.push(pbf.pos); }
-	    else if (tag === 3) { layer._keys.push(pbf.readString()); }
-	    else if (tag === 4) { layer._values.push(readValueMessage(pbf)); }
-	}
+	          vals.splice(oldIndex, 1);
+	          tags[oldTagKey] = vals.join(';');
+	        }
+	      }
+	    }
 
-	function readValueMessage(pbf) {
-	    var value = null,
-	        end = pbf.readVarint() + pbf.pos;
+	    if (replaceTags) {
+	      for (var replaceKey in replaceTags) {
+	        var replaceValue = replaceTags[replaceKey];
 
-	    while (pbf.pos < end) {
-	        var tag = pbf.readVarint() >> 3;
+	        if (replaceValue === '*') {
+	          if (tags[replaceKey] && tags[replaceKey] !== 'no') {
+	            // allow any pre-existing value except `no` (troll tag)
+	            continue;
+	          } else {
+	            // otherwise assume `yes` is okay
+	            tags[replaceKey] = 'yes';
+	          }
+	        } else if (replaceValue === '$1') {
+	          tags[replaceKey] = transferValue;
+	        } else {
+	          if (tags[replaceKey] && oldTags[replaceKey] && semiIndex !== undefined) {
+	            // don't override preexisting values
+	            var existingVals = tags[replaceKey].split(';').filter(Boolean);
 
-	        value = tag === 1 ? pbf.readString() :
-	            tag === 2 ? pbf.readFloat() :
-	            tag === 3 ? pbf.readDouble() :
-	            tag === 4 ? pbf.readVarint64() :
-	            tag === 5 ? pbf.readVarint() :
-	            tag === 6 ? pbf.readSVarint() :
-	            tag === 7 ? pbf.readBoolean() : null;
+	            if (existingVals.indexOf(replaceValue) === -1) {
+	              existingVals.splice(semiIndex, 0, replaceValue);
+	              tags[replaceKey] = existingVals.join(';');
+	            }
+	          } else {
+	            tags[replaceKey] = replaceValue;
+	          }
+	        }
+	      }
 	    }
 
-	    return value;
+	    return graph.replace(entity.update({
+	      tags: tags
+	    }));
+	  };
 	}
 
-	// return feature `i` from this layer as a `VectorTileFeature`
-	VectorTileLayer.prototype.feature = function(i) {
-	    if (i < 0 || i >= this._features.length) { throw new Error('feature index out of bounds'); }
+	function behaviorEdit(context) {
+	  function behavior() {
+	    context.map().minzoom(context.minEditableZoom());
+	  }
 
-	    this._pbf.pos = this._features[i];
+	  behavior.off = function () {
+	    context.map().minzoom(0);
+	  };
 
-	    var end = this._pbf.readVarint() + this._pbf.pos;
-	    return new vectortilefeature(this._pbf, end, this.extent, this._keys, this._values);
-	};
+	  return behavior;
+	}
 
-	var vectortile = VectorTile;
+	/*
+	   The hover behavior adds the `.hover` class on pointerover to all elements to which
+	   the identical datum is bound, and removes it on pointerout.
 
-	function VectorTile(pbf, end) {
-	    this.layers = pbf.readFields(readTile, {}, end);
-	}
+	   The :hover pseudo-class is insufficient for iD's purposes because a datum's visual
+	   representation may consist of several elements scattered throughout the DOM hierarchy.
+	   Only one of these elements can have the :hover pseudo-class, but all of them will
+	   have the .hover class.
+	 */
 
-	function readTile(tag, layers, pbf) {
-	    if (tag === 3) {
-	        var layer = new vectortilelayer(pbf, pbf.readVarint() + pbf.pos);
-	        if (layer.length) { layers[layer.name] = layer; }
-	    }
-	}
+	function behaviorHover(context) {
+	  var dispatch = dispatch$8('hover');
 
-	var VectorTile$1 = vectortile;
-	var VectorTileFeature$1 = vectortilefeature;
-	var VectorTileLayer$1 = vectortilelayer;
+	  var _selection = select(null);
 
-	var vectorTile = {
-		VectorTile: VectorTile$1,
-		VectorTileFeature: VectorTileFeature$1,
-		VectorTileLayer: VectorTileLayer$1
-	};
+	  var _newNodeId = null;
+	  var _initialNodeID = null;
 
-	var tiler$7 = utilTiler().tileSize(512).margin(1);
-	var dispatch$8 = dispatch('loadedData');
-	var _vtCache;
+	  var _altDisables;
 
+	  var _ignoreVertex;
 
-	function abortRequest$7(controller) {
-	    controller.abort();
-	}
+	  var _targets = []; // use pointer events on supported platforms; fallback to mouse events
 
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	function vtToGeoJSON(data, tile, mergeCache) {
-	    var vectorTile$1 = new vectorTile.VectorTile(new pbf(data));
-	    var layers = Object.keys(vectorTile$1.layers);
-	    if (!Array.isArray(layers)) { layers = [layers]; }
-
-	    var features = [];
-	    layers.forEach(function(layerID) {
-	        var layer = vectorTile$1.layers[layerID];
-	        if (layer) {
-	            for (var i = 0; i < layer.length; i++) {
-	                var feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
-	                var geometry = feature.geometry;
-
-	                // Treat all Polygons as MultiPolygons
-	                if (geometry.type === 'Polygon') {
-	                    geometry.type = 'MultiPolygon';
-	                    geometry.coordinates = [geometry.coordinates];
-	                }
+	  function keydown(d3_event) {
+	    if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      _selection.selectAll('.hover').classed('hover-suppressed', true).classed('hover', false);
 
-	                // Clip to tile bounds
-	                if (geometry.type === 'MultiPolygon') {
-	                    var isClipped = false;
-	                    var featureClip = turf_bboxClip(feature, tile.extent.rectangle());
-	                    if (!fastDeepEqual(feature.geometry, featureClip.geometry)) {
-	                        // feature = featureClip;
-	                        isClipped = true;
-	                    }
-	                    if (!feature.geometry.coordinates.length) { continue; }   // not actually on this tile
-	                    if (!feature.geometry.coordinates[0].length) { continue; }   // not actually on this tile
-	                }
+	      _selection.classed('hover-disabled', true);
 
-	                // Generate some unique IDs and add some metadata
-	                var featurehash = utilHashcode(fastJsonStableStringify(feature));
-	                var propertyhash = utilHashcode(fastJsonStableStringify(feature.properties || {}));
-	                feature.__layerID__ = layerID.replace(/[^_a-zA-Z0-9\-]/g, '_');
-	                feature.__featurehash__ = featurehash;
-	                feature.__propertyhash__ = propertyhash;
-	                features.push(feature);
-
-	                // Clipped Polygons at same zoom with identical properties can get merged
-	                if (isClipped && geometry.type === 'MultiPolygon') {
-	                    var merged = mergeCache[propertyhash];
-	                    if (merged && merged.length) {
-	                        var other = merged[0];
-	                        var coords = union(
-	                            feature.geometry.coordinates,
-	                            other.geometry.coordinates
-	                        );
-
-	                        if (!coords || !coords.length) {
-	                            continue;  // something failed in martinez union
-	                        }
-
-	                        merged.push(feature);
-	                        for (var j = 0; j < merged.length; j++) {      // all these features get...
-	                            merged[j].geometry.coordinates = coords;   // same coords
-	                            merged[j].__featurehash__ = featurehash;   // same hash, so deduplication works
-	                        }
-	                    } else {
-	                        mergeCache[propertyhash] = [feature];
-	                    }
-	                }
-	            }
-	        }
-	    });
+	      dispatch.call('hover', this, null);
+	    }
+	  }
 
-	    return features;
-	}
+	  function keyup(d3_event) {
+	    if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false).classed('hover', true);
 
+	      _selection.classed('hover-disabled', false);
 
-	function loadTile(source, tile) {
-	    if (source.loaded[tile.id] || source.inflight[tile.id]) { return; }
-
-	    var url = source.template
-	        .replace('{x}', tile.xyz[0])
-	        .replace('{y}', tile.xyz[1])
-	        // TMS-flipped y coordinate
-	        .replace(/\{[t-]y\}/, Math.pow(2, tile.xyz[2]) - tile.xyz[1] - 1)
-	        .replace(/\{z(oom)?\}/, tile.xyz[2])
-	        .replace(/\{switch:([^}]+)\}/, function(s, r) {
-	            var subdomains = r.split(',');
-	            return subdomains[(tile.xyz[0] + tile.xyz[1]) % subdomains.length];
-	        });
+	      dispatch.call('hover', this, _targets);
+	    }
+	  }
 
+	  function behavior(selection) {
+	    _selection = selection;
+	    _targets = [];
 
-	    var controller = new AbortController();
-	    source.inflight[tile.id] = controller;
+	    if (_initialNodeID) {
+	      _newNodeId = _initialNodeID;
+	      _initialNodeID = null;
+	    } else {
+	      _newNodeId = null;
+	    }
 
-	    fetch(url, { signal: controller.signal })
-	        .then(function(response) {
-	            if (!response.ok) {
-	                throw new Error(response.status + ' ' + response.statusText);
-	            }
-	            source.loaded[tile.id] = [];
-	            delete source.inflight[tile.id];
-	            return response.arrayBuffer();
-	        })
-	        .then(function(data) {
-	            if (!data) {
-	                throw new Error('No Data');
-	            }
+	    _selection.on(_pointerPrefix + 'over.hover', pointerover).on(_pointerPrefix + 'out.hover', pointerout) // treat pointerdown as pointerover for touch devices
+	    .on(_pointerPrefix + 'down.hover', pointerover);
 
-	            var z = tile.xyz[2];
-	            if (!source.canMerge[z]) {
-	                source.canMerge[z] = {};  // initialize mergeCache
-	            }
+	    select(window).on(_pointerPrefix + 'up.hover pointercancel.hover', pointerout, true).on('keydown.hover', keydown).on('keyup.hover', keyup);
 
-	            source.loaded[tile.id] = vtToGeoJSON(data, tile, source.canMerge[z]);
-	            dispatch$8.call('loadedData');
-	        })
-	        .catch(function() {
-	            source.loaded[tile.id] = [];
-	            delete source.inflight[tile.id];
-	        });
-	}
+	    function eventTarget(d3_event) {
+	      var datum = d3_event.target && d3_event.target.__data__;
+	      if (_typeof(datum) !== 'object') return null;
 
+	      if (!(datum instanceof osmEntity) && datum.properties && datum.properties.entity instanceof osmEntity) {
+	        return datum.properties.entity;
+	      }
 
-	var serviceVectorTile = {
+	      return datum;
+	    }
 
-	    init: function() {
-	        if (!_vtCache) {
-	            this.reset();
-	        }
+	    function pointerover(d3_event) {
+	      // ignore mouse hovers with buttons pressed unless dragging
+	      if (context.mode().id.indexOf('drag') === -1 && (!d3_event.pointerType || d3_event.pointerType === 'mouse') && d3_event.buttons) return;
+	      var target = eventTarget(d3_event);
 
-	        this.event = utilRebind(this, dispatch$8, 'on');
-	    },
+	      if (target && _targets.indexOf(target) === -1) {
+	        _targets.push(target);
 
+	        updateHover(d3_event, _targets);
+	      }
+	    }
 
-	    reset: function() {
-	        for (var sourceID in _vtCache) {
-	            var source = _vtCache[sourceID];
-	            if (source && source.inflight) {
-	                Object.values(source.inflight).forEach(abortRequest$7);
-	            }
-	        }
+	    function pointerout(d3_event) {
+	      var target = eventTarget(d3_event);
 
-	        _vtCache = {};
-	    },
+	      var index = _targets.indexOf(target);
 
+	      if (index !== -1) {
+	        _targets.splice(index);
 
-	    addSource: function(sourceID, template) {
-	        _vtCache[sourceID] = { template: template, inflight: {}, loaded: {}, canMerge: {} };
-	        return _vtCache[sourceID];
-	    },
+	        updateHover(d3_event, _targets);
+	      }
+	    }
 
+	    function allowsVertex(d) {
+	      return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
+	    }
 
-	    data: function(sourceID, projection) {
-	        var source = _vtCache[sourceID];
-	        if (!source) { return []; }
+	    function modeAllowsHover(target) {
+	      var mode = context.mode();
 
-	        var tiles = tiler$7.getTiles(projection);
-	        var seen = {};
-	        var results = [];
+	      if (mode.id === 'add-point') {
+	        return mode.preset.matchGeometry('vertex') || target.type !== 'way' && target.geometry(context.graph()) !== 'vertex';
+	      }
 
-	        for (var i = 0; i < tiles.length; i++) {
-	            var features = source.loaded[tiles[i].id];
-	            if (!features || !features.length) { continue; }
+	      return true;
+	    }
 
-	            for (var j = 0; j < features.length; j++) {
-	                var feature = features[j];
-	                var hash = feature.__featurehash__;
-	                if (seen[hash]) { continue; }
-	                seen[hash] = true;
+	    function updateHover(d3_event, targets) {
+	      _selection.selectAll('.hover').classed('hover', false);
 
-	                // return a shallow copy, because the hash may change
-	                // later if this feature gets merged with another
-	                results.push(Object.assign({}, feature));  // shallow copy
-	            }
-	        }
+	      _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false);
 
-	        return results;
-	    },
+	      var mode = context.mode();
 
+	      if (!_newNodeId && (mode.id === 'draw-line' || mode.id === 'draw-area')) {
+	        var node = targets.find(function (target) {
+	          return target instanceof osmEntity && target.type === 'node';
+	        });
+	        _newNodeId = node && node.id;
+	      }
 
-	    loadTiles: function(sourceID, template, projection) {
-	        var source = _vtCache[sourceID];
-	        if (!source) {
-	            source = this.addSource(sourceID, template);
+	      targets = targets.filter(function (datum) {
+	        if (datum instanceof osmEntity) {
+	          // If drawing a way, don't hover on a node that was just placed. #3974
+	          return datum.id !== _newNodeId && (datum.type !== 'node' || !_ignoreVertex || allowsVertex(datum)) && modeAllowsHover(datum);
 	        }
 
-	        var tiles = tiler$7.getTiles(projection);
+	        return true;
+	      });
+	      var selector = '';
+
+	      for (var i in targets) {
+	        var datum = targets[i]; // What are we hovering over?
+
+	        if (datum.__featurehash__) {
+	          // hovering custom data
+	          selector += ', .data' + datum.__featurehash__;
+	        } else if (datum instanceof QAItem) {
+	          selector += ', .' + datum.service + '.itemId-' + datum.id;
+	        } else if (datum instanceof osmNote) {
+	          selector += ', .note-' + datum.id;
+	        } else if (datum instanceof osmEntity) {
+	          selector += ', .' + datum.id;
 
-	        // abort inflight requests that are no longer needed
-	        Object.keys(source.inflight).forEach(function(k) {
-	            var wanted = tiles.find(function(tile) { return k === tile.id; });
-	            if (!wanted) {
-	                abortRequest$7(source.inflight[k]);
-	                delete source.inflight[k];
+	          if (datum.type === 'relation') {
+	            for (var j in datum.members) {
+	              selector += ', .' + datum.members[j].id;
 	            }
-	        });
+	          }
+	        }
+	      }
 
-	        tiles.forEach(function(tile) {
-	            loadTile(source, tile);
-	        });
-	    },
+	      var suppressed = _altDisables && d3_event && d3_event.altKey;
 
+	      if (selector.trim().length) {
+	        // remove the first comma
+	        selector = selector.slice(1);
 
-	    cache: function() {
-	        return _vtCache;
+	        _selection.selectAll(selector).classed(suppressed ? 'hover-suppressed' : 'hover', true);
+	      }
+
+	      dispatch.call('hover', this, !suppressed && targets);
 	    }
+	  }
 
-	};
+	  behavior.off = function (selection) {
+	    selection.selectAll('.hover').classed('hover', false);
+	    selection.selectAll('.hover-suppressed').classed('hover-suppressed', false);
+	    selection.classed('hover-disabled', false);
+	    selection.on(_pointerPrefix + 'over.hover', null).on(_pointerPrefix + 'out.hover', null).on(_pointerPrefix + 'down.hover', null);
+	    select(window).on(_pointerPrefix + 'up.hover pointercancel.hover', null, true).on('keydown.hover', null).on('keyup.hover', null);
+	  };
 
-	var apibase$5 = 'https://www.wikidata.org/w/api.php?';
-	var _wikidataCache = {};
+	  behavior.altDisables = function (val) {
+	    if (!arguments.length) return _altDisables;
+	    _altDisables = val;
+	    return behavior;
+	  };
 
+	  behavior.ignoreVertex = function (val) {
+	    if (!arguments.length) return _ignoreVertex;
+	    _ignoreVertex = val;
+	    return behavior;
+	  };
 
-	var serviceWikidata = {
+	  behavior.initialNodeID = function (nodeId) {
+	    _initialNodeID = nodeId;
+	    return behavior;
+	  };
 
-	    init: function() {},
+	  return utilRebind(behavior, dispatch, 'on');
+	}
 
-	    reset: function() {
-	        _wikidataCache = {};
-	    },
+	var _disableSpace = false;
+	var _lastSpace = null;
+	function behaviorDraw(context) {
+	  var dispatch = dispatch$8('move', 'down', 'downcancel', 'click', 'clickWay', 'clickNode', 'undo', 'cancel', 'finish');
+	  var keybinding = utilKeybinding('draw');
 
+	  var _hover = behaviorHover(context).altDisables(true).ignoreVertex(true).on('hover', context.ui().sidebar.hover);
 
-	    // Search for Wikidata items matching the query
-	    itemsForSearchQuery: function(query, callback) {
-	        if (!query) {
-	            if (callback) { callback('No query', {}); }
-	            return;
-	        }
+	  var _edit = behaviorEdit(context);
 
-	        var lang = this.languagesToQuery()[0];
-
-	        var url = apibase$5 + utilQsString({
-	            action: 'wbsearchentities',
-	            format: 'json',
-	            formatversion: 2,
-	            search: query,
-	            type: 'item',
-	            // the language to search
-	            language: lang,
-	            // the language for the label and description in the result
-	            uselang: lang,
-	            limit: 10,
-	            origin: '*'
-	        });
+	  var _closeTolerance = 4;
+	  var _tolerance = 12;
+	  var _mouseLeave = false;
+	  var _lastMouse = null;
 
-	        d3_json(url)
-	            .then(function(result) {
-	                if (result && result.error) {
-	                    throw new Error(result.error);
-	                }
-	                if (callback) { callback(null, result.search || {}); }
-	            })
-	            .catch(function(err) {
-	                if (callback) { callback(err.message, {}); }
-	            });
-	    },
+	  var _lastPointerUpEvent;
 
+	  var _downPointer; // use pointer events on supported platforms; fallback to mouse events
 
-	    // Given a Wikipedia language and article title,
-	    // return an array of corresponding Wikidata entities.
-	    itemsByTitle: function(lang, title, callback) {
-	        if (!title) {
-	            if (callback) { callback('No title', {}); }
-	            return;
-	        }
 
-	        lang = lang || 'en';
-	        var url = apibase$5 + utilQsString({
-	            action: 'wbgetentities',
-	            format: 'json',
-	            formatversion: 2,
-	            sites: lang.replace(/-/g, '_') + 'wiki',
-	            titles: title,
-	            languages: 'en', // shrink response by filtering to one language
-	            origin: '*'
-	        });
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // related code
+	  // - `mode/drag_node.js` `datum()`
 
-	        d3_json(url)
-	            .then(function(result) {
-	                if (result && result.error) {
-	                    throw new Error(result.error);
-	                }
-	                if (callback) { callback(null, result.entities || {}); }
-	            })
-	            .catch(function(err) {
-	                if (callback) { callback(err.message, {}); }
-	            });
-	    },
 
+	  function datum(d3_event) {
+	    var mode = context.mode();
+	    var isNote = mode && mode.id.indexOf('note') !== -1;
+	    if (d3_event.altKey || isNote) return {};
+	    var element;
 
-	    languagesToQuery: function() {
-	        var localeCode = _mainLocalizer.localeCode().toLowerCase();
-	        // HACK: en-us isn't a wikidata language. We should really be filtering by
-	        // the languages known to be supported by wikidata.
-	        if (localeCode === 'en-us') { localeCode = 'en'; }
-	        return utilArrayUniq([
-	            localeCode,
-	            _mainLocalizer.languageCode().toLowerCase(),
-	            'en'
-	        ]);
-	    },
+	    if (d3_event.type === 'keydown') {
+	      element = _lastMouse && _lastMouse.target;
+	    } else {
+	      element = d3_event.target;
+	    } // When drawing, snap only to touch targets..
+	    // (this excludes area fills and active drawing elements)
 
 
-	    entityByQID: function(qid, callback) {
-	        if (!qid) {
-	            callback('No qid', {});
-	            return;
-	        }
-	        if (_wikidataCache[qid]) {
-	            if (callback) { callback(null, _wikidataCache[qid]); }
-	            return;
-	        }
+	    var d = element.__data__;
+	    return d && d.properties && d.properties.target ? d : {};
+	  }
 
-	        var langs = this.languagesToQuery();
-	        var url = apibase$5 + utilQsString({
-	            action: 'wbgetentities',
-	            format: 'json',
-	            formatversion: 2,
-	            ids: qid,
-	            props: 'labels|descriptions|claims|sitelinks',
-	            sitefilter: langs.map(function(d) { return d + 'wiki'; }).join('|'),
-	            languages: langs.join('|'),
-	            languagefallback: 1,
-	            origin: '*'
-	        });
+	  function pointerdown(d3_event) {
+	    if (_downPointer) return;
+	    var pointerLocGetter = utilFastMouse(this);
+	    _downPointer = {
+	      id: d3_event.pointerId || 'mouse',
+	      pointerLocGetter: pointerLocGetter,
+	      downTime: +new Date(),
+	      downLoc: pointerLocGetter(d3_event)
+	    };
+	    dispatch.call('down', this, d3_event, datum(d3_event));
+	  }
 
-	        d3_json(url)
-	            .then(function(result) {
-	                if (result && result.error) {
-	                    throw new Error(result.error);
-	                }
-	                if (callback) { callback(null, result.entities[qid] || {}); }
-	            })
-	            .catch(function(err) {
-	                if (callback) { callback(err.message, {}); }
-	            });
-	    },
+	  function pointerup(d3_event) {
+	    if (!_downPointer || _downPointer.id !== (d3_event.pointerId || 'mouse')) return;
+	    var downPointer = _downPointer;
+	    _downPointer = null;
+	    _lastPointerUpEvent = d3_event;
+	    if (downPointer.isCancelled) return;
+	    var t2 = +new Date();
+	    var p2 = downPointer.pointerLocGetter(d3_event);
+	    var dist = geoVecLength(downPointer.downLoc, p2);
 
+	    if (dist < _closeTolerance || dist < _tolerance && t2 - downPointer.downTime < 500) {
+	      // Prevent a quick second click
+	      select(window).on('click.draw-block', function () {
+	        d3_event.stopPropagation();
+	      }, true);
+	      context.map().dblclickZoomEnable(false);
+	      window.setTimeout(function () {
+	        context.map().dblclickZoomEnable(true);
+	        select(window).on('click.draw-block', null);
+	      }, 500);
+	      click(d3_event, p2);
+	    }
+	  }
 
-	    // Pass `params` object of the form:
-	    // {
-	    //   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
-	    // }
-	    //
-	    // Get an result object used to display tag documentation
-	    // {
-	    //   title:        'string',
-	    //   description:  'string',
-	    //   editURL:      'string',
-	    //   imageURL:     'string',
-	    //   wiki:         { title: 'string', text: 'string', url: 'string' }
-	    // }
-	    //
-	    getDocs: function(params, callback) {
-	        var langs = this.languagesToQuery();
-	        this.entityByQID(params.qid, function(err, entity) {
-	            if (err || !entity) {
-	                callback(err || 'No entity');
-	                return;
-	            }
+	  function pointermove(d3_event) {
+	    if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse') && !_downPointer.isCancelled) {
+	      var p2 = _downPointer.pointerLocGetter(d3_event);
 
-	            var i;
-	            var description;
-	            if (entity.descriptions && Object.keys(entity.descriptions).length > 0) {
-	                description = entity.descriptions[Object.keys(entity.descriptions)[0]].value;
-	            }
+	      var dist = geoVecLength(_downPointer.downLoc, p2);
 
-	            // prepare result
-	            var result = {
-	                title: entity.id,
-	                description: description,
-	                editURL: 'https://www.wikidata.org/wiki/' + entity.id
-	            };
+	      if (dist >= _closeTolerance) {
+	        _downPointer.isCancelled = true;
+	        dispatch.call('downcancel', this);
+	      }
+	    }
 
-	            // add image
-	            if (entity.claims) {
-	                var imageroot = 'https://commons.wikimedia.org/w/index.php';
-	                var props = ['P154','P18'];  // logo image, image
-	                var prop, image;
-	                for (i = 0; i < props.length; i++) {
-	                    prop = entity.claims[props[i]];
-	                    if (prop && Object.keys(prop).length > 0) {
-	                        image = prop[Object.keys(prop)[0]].mainsnak.datavalue.value;
-	                        if (image) {
-	                            result.imageURL = imageroot + '?' + utilQsString({
-	                                title: 'Special:Redirect/file/' + image,
-	                                width: 400
-	                            });
-	                            break;
-	                        }
-	                    }
-	                }
-	            }
+	    if (d3_event.pointerType && d3_event.pointerType !== 'mouse' || d3_event.buttons || _downPointer) return; // HACK: Mobile Safari likes to send one or more `mouse` type pointermove
+	    // events immediately after non-mouse pointerup events; detect and ignore them.
 
-	            if (entity.sitelinks) {
-	                var englishLocale = _mainLocalizer.languageCode().toLowerCase() === 'en';
-
-	                // must be one of these that we requested..
-	                for (i = 0; i < langs.length; i++) {   // check each, in order of preference
-	                    var w = langs[i] + 'wiki';
-	                    if (entity.sitelinks[w]) {
-	                        var title = entity.sitelinks[w].title;
-	                        var tKey = 'inspector.wiki_reference';
-	                        if (!englishLocale && langs[i] === 'en') {   // user's locale isn't English but
-	                            tKey = 'inspector.wiki_en_reference';    // we are sending them to enwiki anyway..
-	                        }
-
-	                        result.wiki = {
-	                            title: title,
-	                            text: tKey,
-	                            url: 'https://' + langs[i] + '.wikipedia.org/wiki/' + title.replace(/ /g, '_')
-	                        };
-	                        break;
-	                    }
-	                }
-	            }
+	    if (_lastPointerUpEvent && _lastPointerUpEvent.pointerType !== 'mouse' && d3_event.timeStamp - _lastPointerUpEvent.timeStamp < 100) return;
+	    _lastMouse = d3_event;
+	    dispatch.call('move', this, d3_event, datum(d3_event));
+	  }
 
-	            callback(null, result);
-	        });
+	  function pointercancel(d3_event) {
+	    if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse')) {
+	      if (!_downPointer.isCancelled) {
+	        dispatch.call('downcancel', this);
+	      }
+
+	      _downPointer = null;
 	    }
+	  }
 
-	};
+	  function mouseenter() {
+	    _mouseLeave = false;
+	  }
 
-	var endpoint = 'https://en.wikipedia.org/w/api.php?';
+	  function mouseleave() {
+	    _mouseLeave = true;
+	  }
 
-	var serviceWikipedia = {
+	  function allowsVertex(d) {
+	    return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
+	  } // related code
+	  // - `mode/drag_node.js`     `doMove()`
+	  // - `behavior/draw.js`      `click()`
+	  // - `behavior/draw_way.js`  `move()`
 
-	    init: function() {},
-	    reset: function() {},
 
+	  function click(d3_event, loc) {
+	    var d = datum(d3_event);
+	    var target = d && d.properties && d.properties.entity;
+	    var mode = context.mode();
 
-	    search: function(lang, query, callback) {
-	        if (!query) {
-	            if (callback) { callback('No Query', []); }
-	            return;
-	        }
+	    if (target && target.type === 'node' && allowsVertex(target)) {
+	      // Snap to a node
+	      dispatch.call('clickNode', this, target, d);
+	      return;
+	    } else if (target && target.type === 'way' && (mode.id !== 'add-point' || mode.preset.matchGeometry('vertex'))) {
+	      // Snap to a way
+	      var choice = geoChooseEdge(context.graph().childNodes(target), loc, context.projection, context.activeID());
 
-	        lang = lang || 'en';
-	        var url = endpoint.replace('en', lang) +
-	            utilQsString({
-	                action: 'query',
-	                list: 'search',
-	                srlimit: '10',
-	                srinfo: 'suggestion',
-	                format: 'json',
-	                origin: '*',
-	                srsearch: query
-	            });
+	      if (choice) {
+	        var edge = [target.nodes[choice.index - 1], target.nodes[choice.index]];
+	        dispatch.call('clickWay', this, choice.loc, edge, d);
+	        return;
+	      }
+	    } else if (mode.id !== 'add-point' || mode.preset.matchGeometry('point')) {
+	      var locLatLng = context.projection.invert(loc);
+	      dispatch.call('click', this, locLatLng, d);
+	    }
+	  } // treat a spacebar press like a click
 
-	        d3_json(url)
-	            .then(function(result) {
-	                if (result && result.error) {
-	                    throw new Error(result.error);
-	                } else if (!result || !result.query || !result.query.search) {
-	                    throw new Error('No Results');
-	                }
-	                if (callback) {
-	                    var titles = result.query.search.map(function(d) { return d.title; });
-	                    callback(null, titles);
-	                }
-	            })
-	            .catch(function(err) {
-	                if (callback) { callback(err, []); }
-	            });
-	    },
 
+	  function space(d3_event) {
+	    d3_event.preventDefault();
+	    d3_event.stopPropagation();
+	    var currSpace = context.map().mouse();
 
-	    suggestions: function(lang, query, callback) {
-	        if (!query) {
-	            if (callback) { callback('', []); }
-	            return;
-	        }
+	    if (_disableSpace && _lastSpace) {
+	      var dist = geoVecLength(_lastSpace, currSpace);
 
-	        lang = lang || 'en';
-	        var url = endpoint.replace('en', lang) +
-	            utilQsString({
-	                action: 'opensearch',
-	                namespace: 0,
-	                suggest: '',
-	                format: 'json',
-	                origin: '*',
-	                search: query
-	            });
+	      if (dist > _tolerance) {
+	        _disableSpace = false;
+	      }
+	    }
 
-	        d3_json(url)
-	            .then(function(result) {
-	                if (result && result.error) {
-	                    throw new Error(result.error);
-	                } else if (!result || result.length < 2) {
-	                    throw new Error('No Results');
-	                }
-	                if (callback) { callback(null, result[1] || []); }
-	            })
-	            .catch(function(err) {
-	                if (callback) { callback(err.message, []); }
-	            });
-	    },
+	    if (_disableSpace || _mouseLeave || !_lastMouse) return; // user must move mouse or release space bar to allow another click
 
+	    _lastSpace = currSpace;
+	    _disableSpace = true;
+	    select(window).on('keyup.space-block', function () {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation();
+	      _disableSpace = false;
+	      select(window).on('keyup.space-block', null);
+	    }); // get the current mouse position
 
-	    translations: function(lang, title, callback) {
-	        if (!title) {
-	            if (callback) { callback('No Title'); }
-	            return;
-	        }
+	    var loc = context.map().mouse() || // or the map center if the mouse has never entered the map
+	    context.projection(context.map().center());
+	    click(d3_event, loc);
+	  }
 
-	        var url = endpoint.replace('en', lang) +
-	            utilQsString({
-	                action: 'query',
-	                prop: 'langlinks',
-	                format: 'json',
-	                origin: '*',
-	                lllimit: 500,
-	                titles: title
-	            });
+	  function backspace(d3_event) {
+	    d3_event.preventDefault();
+	    dispatch.call('undo');
+	  }
 
-	        d3_json(url)
-	            .then(function(result) {
-	                if (result && result.error) {
-	                    throw new Error(result.error);
-	                } else if (!result || !result.query || !result.query.pages) {
-	                    throw new Error('No Results');
-	                }
-	                if (callback) {
-	                    var list = result.query.pages[Object.keys(result.query.pages)[0]];
-	                    var translations = {};
-	                    if (list && list.langlinks) {
-	                        list.langlinks.forEach(function(d) { translations[d.lang] = d['*']; });
-	                    }
-	                    callback(null, translations);
-	                }
-	            })
-	            .catch(function(err) {
-	                if (callback) { callback(err.message); }
-	            });
-	    }
+	  function del(d3_event) {
+	    d3_event.preventDefault();
+	    dispatch.call('cancel');
+	  }
 
-	};
+	  function ret(d3_event) {
+	    d3_event.preventDefault();
+	    dispatch.call('finish');
+	  }
 
-	var services = {
-	    geocoder: serviceNominatim,
-	    keepRight: serviceKeepRight,
-	    improveOSM: serviceImproveOSM,
-	    osmose: serviceOsmose,
-	    mapillary: serviceMapillary,
-	    openstreetcam: serviceOpenstreetcam,
-	    osm: serviceOsm,
-	    osmWikibase: serviceOsmWikibase,
-	    maprules: serviceMapRules,
-	    streetside: serviceStreetside,
-	    taginfo: serviceTaginfo,
-	    vectorTile: serviceVectorTile,
-	    wikidata: serviceWikidata,
-	    wikipedia: serviceWikipedia
-	};
+	  function behavior(selection) {
+	    context.install(_hover);
+	    context.install(_edit);
+	    _downPointer = null;
+	    keybinding.on('⌫', backspace).on('⌦', del).on('⎋', ret).on('↩', ret).on('space', space).on('⌥space', space);
+	    selection.on('mouseenter.draw', mouseenter).on('mouseleave.draw', mouseleave).on(_pointerPrefix + 'down.draw', pointerdown).on(_pointerPrefix + 'move.draw', pointermove);
+	    select(window).on(_pointerPrefix + 'up.draw', pointerup, true).on('pointercancel.draw', pointercancel, true);
+	    select(document).call(keybinding);
+	    return behavior;
+	  }
 
-	function svgIcon(name, svgklass, useklass) {
-	    return function drawIcon(selection) {
-	        selection.selectAll('svg.icon' + (svgklass ? '.' + svgklass.split(' ')[0] : ''))
-	            .data([0])
-	            .enter()
-	            .append('svg')
-	            .attr('class', 'icon ' + (svgklass || ''))
-	            .append('use')
-	            .attr('xlink:href', name)
-	            .attr('class', useklass);
-	    };
+	  behavior.off = function (selection) {
+	    context.ui().sidebar.hover.cancel();
+	    context.uninstall(_hover);
+	    context.uninstall(_edit);
+	    selection.on('mouseenter.draw', null).on('mouseleave.draw', null).on(_pointerPrefix + 'down.draw', null).on(_pointerPrefix + 'move.draw', null);
+	    select(window).on(_pointerPrefix + 'up.draw', null).on('pointercancel.draw', null); // note: keyup.space-block, click.draw-block should remain
+
+	    select(document).call(keybinding.unbind);
+	  };
+
+	  behavior.hover = function () {
+	    return _hover;
+	  };
+
+	  return utilRebind(behavior, dispatch, 'on');
 	}
 
-	function uiNoteComments() {
-	    var _note;
+	function initRange(domain, range) {
+	  switch (arguments.length) {
+	    case 0:
+	      break;
+
+	    case 1:
+	      this.range(domain);
+	      break;
 
+	    default:
+	      this.range(range).domain(domain);
+	      break;
+	  }
 
-	    function noteComments(selection) {
-	        if (_note.isNew()) { return; } // don't draw .comments-container
+	  return this;
+	}
 
-	        var comments = selection.selectAll('.comments-container')
-	            .data([0]);
+	function constants(x) {
+	  return function () {
+	    return x;
+	  };
+	}
 
-	        comments = comments.enter()
-	            .append('div')
-	            .attr('class', 'comments-container')
-	            .merge(comments);
+	function number(x) {
+	  return +x;
+	}
 
-	        var commentEnter = comments.selectAll('.comment')
-	            .data(_note.comments)
-	            .enter()
-	            .append('div')
-	            .attr('class', 'comment');
+	var unit = [0, 1];
+	function identity$1(x) {
+	  return x;
+	}
 
-	        commentEnter
-	            .append('div')
-	            .attr('class', function(d) { return 'comment-avatar user-' + d.uid; })
-	            .call(svgIcon('#iD-icon-avatar', 'comment-avatar-icon'));
+	function normalize(a, b) {
+	  return (b -= a = +a) ? function (x) {
+	    return (x - a) / b;
+	  } : constants(isNaN(b) ? NaN : 0.5);
+	}
 
-	        var mainEnter = commentEnter
-	            .append('div')
-	            .attr('class', 'comment-main');
+	function clamper(a, b) {
+	  var t;
+	  if (a > b) t = a, a = b, b = t;
+	  return function (x) {
+	    return Math.max(a, Math.min(b, x));
+	  };
+	} // normalize(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].
+	// interpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding range value x in [a,b].
 
-	        var metadataEnter = mainEnter
-	            .append('div')
-	            .attr('class', 'comment-metadata');
 
-	        metadataEnter
-	            .append('div')
-	            .attr('class', 'comment-author')
-	            .each(function(d) {
-	                var selection = select(this);
-	                var osm = services.osm;
-	                if (osm && d.user) {
-	                    selection = selection
-	                        .append('a')
-	                        .attr('class', 'comment-author-link')
-	                        .attr('href', osm.userURL(d.user))
-	                        .attr('tabindex', -1)
-	                        .attr('target', '_blank');
-	                }
-	                selection
-	                    .text(function(d) { return d.user || _t('note.anonymous'); });
-	            });
+	function bimap(domain, range, interpolate) {
+	  var d0 = domain[0],
+	      d1 = domain[1],
+	      r0 = range[0],
+	      r1 = range[1];
+	  if (d1 < d0) d0 = normalize(d1, d0), r0 = interpolate(r1, r0);else d0 = normalize(d0, d1), r0 = interpolate(r0, r1);
+	  return function (x) {
+	    return r0(d0(x));
+	  };
+	}
 
-	        metadataEnter
-	            .append('div')
-	            .attr('class', 'comment-date')
-	            .text(function(d) {
-	                return _t('note.status.' + d.action, { when: localeDateString(d.date) });
-	            });
+	function polymap(domain, range, interpolate) {
+	  var j = Math.min(domain.length, range.length) - 1,
+	      d = new Array(j),
+	      r = new Array(j),
+	      i = -1; // Reverse descending domains.
 
-	        mainEnter
-	            .append('div')
-	            .attr('class', 'comment-text')
-	            .html(function(d) { return d.html; })
-	            .selectAll('a')
-	                .attr('rel', 'noopener nofollow')
-	                .attr('target', '_blank');
+	  if (domain[j] < domain[0]) {
+	    domain = domain.slice().reverse();
+	    range = range.slice().reverse();
+	  }
 
-	        comments
-	            .call(replaceAvatars);
-	    }
+	  while (++i < j) {
+	    d[i] = normalize(domain[i], domain[i + 1]);
+	    r[i] = interpolate(range[i], range[i + 1]);
+	  }
 
+	  return function (x) {
+	    var i = bisectRight(domain, x, 1, j) - 1;
+	    return r[i](d[i](x));
+	  };
+	}
 
-	    function replaceAvatars(selection) {
-	        var showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
-	        var osm = services.osm;
-	        if (showThirdPartyIcons !== 'true' || !osm) { return; }
+	function copy(source, target) {
+	  return target.domain(source.domain()).range(source.range()).interpolate(source.interpolate()).clamp(source.clamp()).unknown(source.unknown());
+	}
+	function transformer() {
+	  var domain = unit,
+	      range = unit,
+	      interpolate = interpolate$1,
+	      transform,
+	      untransform,
+	      unknown,
+	      clamp = identity$1,
+	      piecewise,
+	      output,
+	      input;
 
-	        var uids = {};  // gather uids in the comment thread
-	        _note.comments.forEach(function(d) {
-	            if (d.uid) { uids[d.uid] = true; }
-	        });
+	  function rescale() {
+	    var n = Math.min(domain.length, range.length);
+	    if (clamp !== identity$1) clamp = clamper(domain[0], domain[n - 1]);
+	    piecewise = n > 2 ? polymap : bimap;
+	    output = input = null;
+	    return scale;
+	  }
 
-	        Object.keys(uids).forEach(function(uid) {
-	            osm.loadUser(uid, function(err, user) {
-	                if (!user || !user.image_url) { return; }
+	  function scale(x) {
+	    return x == null || isNaN(x = +x) ? unknown : (output || (output = piecewise(domain.map(transform), range, interpolate)))(transform(clamp(x)));
+	  }
 
-	                selection.selectAll('.comment-avatar.user-' + uid)
-	                    .html('')
-	                    .append('img')
-	                    .attr('class', 'icon comment-avatar-icon')
-	                    .attr('src', user.image_url)
-	                    .attr('alt', user.display_name);
-	            });
-	        });
-	    }
+	  scale.invert = function (y) {
+	    return clamp(untransform((input || (input = piecewise(range, domain.map(transform), d3_interpolateNumber)))(y)));
+	  };
 
+	  scale.domain = function (_) {
+	    return arguments.length ? (domain = Array.from(_, number), rescale()) : domain.slice();
+	  };
 
-	    function localeDateString(s) {
-	        if (!s) { return null; }
-	        var options = { day: 'numeric', month: 'short', year: 'numeric' };
-	        s = s.replace(/-/g, '/'); // fix browser-specific Date() issues
-	        var d = new Date(s);
-	        if (isNaN(d.getTime())) { return null; }
-	        return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
-	    }
+	  scale.range = function (_) {
+	    return arguments.length ? (range = Array.from(_), rescale()) : range.slice();
+	  };
 
+	  scale.rangeRound = function (_) {
+	    return range = Array.from(_), interpolate = interpolateRound, rescale();
+	  };
 
-	    noteComments.note = function(val) {
-	        if (!arguments.length) { return _note; }
-	        _note = val;
-	        return noteComments;
-	    };
+	  scale.clamp = function (_) {
+	    return arguments.length ? (clamp = _ ? true : identity$1, rescale()) : clamp !== identity$1;
+	  };
 
+	  scale.interpolate = function (_) {
+	    return arguments.length ? (interpolate = _, rescale()) : interpolate;
+	  };
 
-	    return noteComments;
-	}
+	  scale.unknown = function (_) {
+	    return arguments.length ? (unknown = _, scale) : unknown;
+	  };
 
-	function uiNoteHeader() {
-	    var _note;
+	  return function (t, u) {
+	    transform = t, untransform = u;
+	    return rescale();
+	  };
+	}
+	function continuous() {
+	  return transformer()(identity$1, identity$1);
+	}
 
+	function formatDecimal (x) {
+	  return Math.abs(x = Math.round(x)) >= 1e21 ? x.toLocaleString("en").replace(/,/g, "") : x.toString(10);
+	} // Computes the decimal coefficient and exponent of the specified number x with
+	// significant digits p, where x is positive and p is in [1, 21] or undefined.
+	// For example, formatDecimalParts(1.23) returns ["123", 0].
 
-	    function noteHeader(selection) {
-	        var header = selection.selectAll('.note-header')
-	            .data(
-	                (_note ? [_note] : []),
-	                function(d) { return d.status + d.id; }
-	            );
+	function formatDecimalParts(x, p) {
+	  if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) return null; // NaN, ±Infinity
 
-	        header.exit()
-	            .remove();
+	  var i,
+	      coefficient = x.slice(0, i); // The string returned by toExponential either has the form \d\.\d+e[-+]\d+
+	  // (e.g., 1.2e+3) or the form \de[-+]\d+ (e.g., 1e+3).
 
-	        var headerEnter = header.enter()
-	            .append('div')
-	            .attr('class', 'note-header');
+	  return [coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient, +x.slice(i + 1)];
+	}
 
-	        var iconEnter = headerEnter
-	            .append('div')
-	            .attr('class', function(d) { return 'note-header-icon ' + d.status; })
-	            .classed('new', function(d) { return d.id < 0; });
+	function exponent (x) {
+	  return x = formatDecimalParts(Math.abs(x)), x ? x[1] : NaN;
+	}
 
-	        iconEnter
-	            .append('div')
-	            .attr('class', 'preset-icon-28')
-	            .call(svgIcon('#iD-icon-note', 'note-fill'));
-
-	        iconEnter.each(function(d) {
-	            var statusIcon = '#iD-icon-' + (d.id < 0 ? 'plus' : (d.status === 'open' ? 'close' : 'apply'));
-	            iconEnter
-	                .append('div')
-	                .attr('class', 'note-icon-annotation')
-	                .call(svgIcon(statusIcon, 'icon-annotation'));
-	        });
+	function formatGroup (grouping, thousands) {
+	  return function (value, width) {
+	    var i = value.length,
+	        t = [],
+	        j = 0,
+	        g = grouping[0],
+	        length = 0;
 
-	        headerEnter
-	            .append('div')
-	            .attr('class', 'note-header-label')
-	            .text(function(d) {
-	                if (_note.isNew()) { return _t('note.new'); }
-	                return _t('note.note') + ' ' + d.id + ' ' +
-	                    (d.status === 'closed' ? _t('note.closed') : '');
-	            });
+	    while (i > 0 && g > 0) {
+	      if (length + g + 1 > width) g = Math.max(1, width - length);
+	      t.push(value.substring(i -= g, i + g));
+	      if ((length += g + 1) > width) break;
+	      g = grouping[j = (j + 1) % grouping.length];
 	    }
 
+	    return t.reverse().join(thousands);
+	  };
+	}
 
-	    noteHeader.note = function(val) {
-	        if (!arguments.length) { return _note; }
-	        _note = val;
-	        return noteHeader;
-	    };
+	function formatNumerals (numerals) {
+	  return function (value) {
+	    return value.replace(/[0-9]/g, function (i) {
+	      return numerals[+i];
+	    });
+	  };
+	}
 
+	// [[fill]align][sign][symbol][0][width][,][.precision][~][type]
+	var re = /^(?:(.)?([<>=^]))?([+\-( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?(~)?([a-z%])?$/i;
+	function formatSpecifier(specifier) {
+	  if (!(match = re.exec(specifier))) throw new Error("invalid format: " + specifier);
+	  var match;
+	  return new FormatSpecifier({
+	    fill: match[1],
+	    align: match[2],
+	    sign: match[3],
+	    symbol: match[4],
+	    zero: match[5],
+	    width: match[6],
+	    comma: match[7],
+	    precision: match[8] && match[8].slice(1),
+	    trim: match[9],
+	    type: match[10]
+	  });
+	}
+	formatSpecifier.prototype = FormatSpecifier.prototype; // instanceof
 
-	    return noteHeader;
+	function FormatSpecifier(specifier) {
+	  this.fill = specifier.fill === undefined ? " " : specifier.fill + "";
+	  this.align = specifier.align === undefined ? ">" : specifier.align + "";
+	  this.sign = specifier.sign === undefined ? "-" : specifier.sign + "";
+	  this.symbol = specifier.symbol === undefined ? "" : specifier.symbol + "";
+	  this.zero = !!specifier.zero;
+	  this.width = specifier.width === undefined ? undefined : +specifier.width;
+	  this.comma = !!specifier.comma;
+	  this.precision = specifier.precision === undefined ? undefined : +specifier.precision;
+	  this.trim = !!specifier.trim;
+	  this.type = specifier.type === undefined ? "" : specifier.type + "";
 	}
 
-	function uiNoteReport() {
-	    var _note;
+	FormatSpecifier.prototype.toString = function () {
+	  return this.fill + this.align + this.sign + this.symbol + (this.zero ? "0" : "") + (this.width === undefined ? "" : Math.max(1, this.width | 0)) + (this.comma ? "," : "") + (this.precision === undefined ? "" : "." + Math.max(0, this.precision | 0)) + (this.trim ? "~" : "") + this.type;
+	};
 
-	    function noteReport(selection) {
-	        var url;
-	        if (services.osm && (_note instanceof osmNote) && (!_note.isNew())) {
-	            url = services.osm.noteReportURL(_note);
-	        }
+	// Trims insignificant zeros, e.g., replaces 1.2000k with 1.2k.
+	function formatTrim (s) {
+	  out: for (var n = s.length, i = 1, i0 = -1, i1; i < n; ++i) {
+	    switch (s[i]) {
+	      case ".":
+	        i0 = i1 = i;
+	        break;
+
+	      case "0":
+	        if (i0 === 0) i0 = i;
+	        i1 = i;
+	        break;
 
-	        var link = selection.selectAll('.note-report')
-	            .data(url ? [url] : []);
+	      default:
+	        if (!+s[i]) break out;
+	        if (i0 > 0) i0 = 0;
+	        break;
+	    }
+	  }
 
-	        // exit
-	        link.exit()
-	            .remove();
+	  return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;
+	}
 
-	        // enter
-	        var linkEnter = link.enter()
-	            .append('a')
-	            .attr('class', 'note-report')
-	            .attr('target', '_blank')
-	            .attr('href', function(d) { return d; })
-	            .call(svgIcon('#iD-icon-out-link', 'inline'));
+	var $$7 = _export;
+	var fails$3 = fails$N;
+	var thisNumberValue = thisNumberValue$2;
 
-	        linkEnter
-	            .append('span')
-	            .text(_t('note.report'));
-	    }
+	var nativeToPrecision = 1.0.toPrecision;
 
+	var FORCED$1 = fails$3(function () {
+	  // IE7-
+	  return nativeToPrecision.call(1, undefined) !== '1';
+	}) || !fails$3(function () {
+	  // V8 ~ Android 4.3-
+	  nativeToPrecision.call({});
+	});
 
-	    noteReport.note = function(val) {
-	        if (!arguments.length) { return _note; }
-	        _note = val;
-	        return noteReport;
-	    };
+	// `Number.prototype.toPrecision` method
+	// https://tc39.es/ecma262/#sec-number.prototype.toprecision
+	$$7({ target: 'Number', proto: true, forced: FORCED$1 }, {
+	  toPrecision: function toPrecision(precision) {
+	    return precision === undefined
+	      ? nativeToPrecision.call(thisNumberValue(this))
+	      : nativeToPrecision.call(thisNumberValue(this), precision);
+	  }
+	});
 
-	    return noteReport;
+	var prefixExponent;
+	function formatPrefixAuto (x, p) {
+	  var d = formatDecimalParts(x, p);
+	  if (!d) return x + "";
+	  var coefficient = d[0],
+	      exponent = d[1],
+	      i = exponent - (prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1,
+	      n = coefficient.length;
+	  return i === n ? coefficient : i > n ? coefficient + new Array(i - n + 1).join("0") : i > 0 ? coefficient.slice(0, i) + "." + coefficient.slice(i) : "0." + new Array(1 - i).join("0") + formatDecimalParts(x, Math.max(0, p + i - 1))[0]; // less than 1y!
 	}
 
-	function uiViewOnOSM(context) {
-	    var _what;   // an osmEntity or osmNote
+	function formatRounded (x, p) {
+	  var d = formatDecimalParts(x, p);
+	  if (!d) return x + "";
+	  var coefficient = d[0],
+	      exponent = d[1];
+	  return exponent < 0 ? "0." + new Array(-exponent).join("0") + coefficient : coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + "." + coefficient.slice(exponent + 1) : coefficient + new Array(exponent - coefficient.length + 2).join("0");
+	}
 
+	var formatTypes = {
+	  "%": function _(x, p) {
+	    return (x * 100).toFixed(p);
+	  },
+	  "b": function b(x) {
+	    return Math.round(x).toString(2);
+	  },
+	  "c": function c(x) {
+	    return x + "";
+	  },
+	  "d": formatDecimal,
+	  "e": function e(x, p) {
+	    return x.toExponential(p);
+	  },
+	  "f": function f(x, p) {
+	    return x.toFixed(p);
+	  },
+	  "g": function g(x, p) {
+	    return x.toPrecision(p);
+	  },
+	  "o": function o(x) {
+	    return Math.round(x).toString(8);
+	  },
+	  "p": function p(x, _p) {
+	    return formatRounded(x * 100, _p);
+	  },
+	  "r": formatRounded,
+	  "s": formatPrefixAuto,
+	  "X": function X(x) {
+	    return Math.round(x).toString(16).toUpperCase();
+	  },
+	  "x": function x(_x) {
+	    return Math.round(_x).toString(16);
+	  }
+	};
 
-	    function viewOnOSM(selection) {
-	        var url;
-	        if (_what instanceof osmEntity) {
-	            url = context.connection().entityURL(_what);
-	        } else if (_what instanceof osmNote) {
-	            url = context.connection().noteURL(_what);
-	        }
+	function identity (x) {
+	  return x;
+	}
 
-	        var data = ((!_what || _what.isNew()) ? [] : [_what]);
-	        var link = selection.selectAll('.view-on-osm')
-	            .data(data, function(d) { return d.id; });
+	var map$1 = Array.prototype.map,
+	    prefixes = ["y", "z", "a", "f", "p", "n", "µ", "m", "", "k", "M", "G", "T", "P", "E", "Z", "Y"];
+	function formatLocale (locale) {
+	  var group = locale.grouping === undefined || locale.thousands === undefined ? identity : formatGroup(map$1.call(locale.grouping, Number), locale.thousands + ""),
+	      currencyPrefix = locale.currency === undefined ? "" : locale.currency[0] + "",
+	      currencySuffix = locale.currency === undefined ? "" : locale.currency[1] + "",
+	      decimal = locale.decimal === undefined ? "." : locale.decimal + "",
+	      numerals = locale.numerals === undefined ? identity : formatNumerals(map$1.call(locale.numerals, String)),
+	      percent = locale.percent === undefined ? "%" : locale.percent + "",
+	      minus = locale.minus === undefined ? "−" : locale.minus + "",
+	      nan = locale.nan === undefined ? "NaN" : locale.nan + "";
 
-	        // exit
-	        link.exit()
-	            .remove();
+	  function newFormat(specifier) {
+	    specifier = formatSpecifier(specifier);
+	    var fill = specifier.fill,
+	        align = specifier.align,
+	        sign = specifier.sign,
+	        symbol = specifier.symbol,
+	        zero = specifier.zero,
+	        width = specifier.width,
+	        comma = specifier.comma,
+	        precision = specifier.precision,
+	        trim = specifier.trim,
+	        type = specifier.type; // The "n" type is an alias for ",g".
 
-	        // enter
-	        var linkEnter = link.enter()
-	            .append('a')
-	            .attr('class', 'view-on-osm')
-	            .attr('target', '_blank')
-	            .attr('href', url)
-	            .call(svgIcon('#iD-icon-out-link', 'inline'));
+	    if (type === "n") comma = true, type = "g"; // The "" type, and any invalid type, is an alias for ".12~g".
+	    else if (!formatTypes[type]) precision === undefined && (precision = 12), trim = true, type = "g"; // If zero fill is specified, padding goes after sign and before digits.
 
-	        linkEnter
-	            .append('span')
-	            .text(_t('inspector.view_on_osm'));
-	    }
+	    if (zero || fill === "0" && align === "=") zero = true, fill = "0", align = "="; // Compute the prefix and suffix.
+	    // For SI-prefix, the suffix is lazily computed.
 
+	    var prefix = symbol === "$" ? currencyPrefix : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "",
+	        suffix = symbol === "$" ? currencySuffix : /[%p]/.test(type) ? percent : ""; // What format function should we use?
+	    // Is this an integer type?
+	    // Can this type generate exponential notation?
 
-	    viewOnOSM.what = function(_) {
-	        if (!arguments.length) { return _what; }
-	        _what = _;
-	        return viewOnOSM;
-	    };
+	    var formatType = formatTypes[type],
+	        maybeSuffix = /[defgprs%]/.test(type); // Set the default precision if not specified,
+	    // or clamp the specified precision to the supported range.
+	    // For significant precision, it must be in [1, 21].
+	    // For fixed precision, it must be in [0, 20].
 
-	    return viewOnOSM;
-	}
+	    precision = precision === undefined ? 6 : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision)) : Math.max(0, Math.min(20, precision));
 
-	function uiNoteEditor(context) {
-	    var dispatch$1 = dispatch('change');
-	    var noteComments = uiNoteComments();
-	    var noteHeader = uiNoteHeader();
+	    function format(value) {
+	      var valuePrefix = prefix,
+	          valueSuffix = suffix,
+	          i,
+	          n,
+	          c;
 
-	    // var formFields = uiFormFields(context);
+	      if (type === "c") {
+	        valueSuffix = formatType(value) + valueSuffix;
+	        value = "";
+	      } else {
+	        value = +value; // Determine the sign. -0 is not less than 0, but 1 / -0 is!
 
-	    var _note;
-	    var _newNote;
-	    // var _fieldsArr;
+	        var valueNegative = value < 0 || 1 / value < 0; // Perform the initial formatting.
 
+	        value = isNaN(value) ? nan : formatType(Math.abs(value), precision); // Trim insignificant zeros.
 
-	    function noteEditor(selection) {
+	        if (trim) value = formatTrim(value); // If a negative value rounds to zero after formatting, and no explicit positive sign is requested, hide the sign.
 
-	        var header = selection.selectAll('.header')
-	            .data([0]);
+	        if (valueNegative && +value === 0 && sign !== "+") valueNegative = false; // Compute the prefix and suffix.
 
-	        var headerEnter = header.enter()
-	            .append('div')
-	            .attr('class', 'header fillL');
+	        valuePrefix = (valueNegative ? sign === "(" ? sign : minus : sign === "-" || sign === "(" ? "" : sign) + valuePrefix;
+	        valueSuffix = (type === "s" ? prefixes[8 + prefixExponent / 3] : "") + valueSuffix + (valueNegative && sign === "(" ? ")" : ""); // Break the formatted value into the integer “value” part that can be
+	        // grouped, and fractional or exponential “suffix” part that is not.
 
-	        headerEnter
-	            .append('button')
-	            .attr('class', 'close')
-	            .on('click', function() {
-	                context.enter(modeBrowse(context));
-	            })
-	            .call(svgIcon('#iD-icon-close'));
+	        if (maybeSuffix) {
+	          i = -1, n = value.length;
 
-	        headerEnter
-	            .append('h3')
-	            .text(_t('note.title'));
+	          while (++i < n) {
+	            if (c = value.charCodeAt(i), 48 > c || c > 57) {
+	              valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;
+	              value = value.slice(0, i);
+	              break;
+	            }
+	          }
+	        }
+	      } // If the fill character is not "0", grouping is applied before padding.
 
 
-	        var body = selection.selectAll('.body')
-	            .data([0]);
+	      if (comma && !zero) value = group(value, Infinity); // Compute the padding.
 
-	        body = body.enter()
-	            .append('div')
-	            .attr('class', 'body')
-	            .merge(body);
+	      var length = valuePrefix.length + value.length + valueSuffix.length,
+	          padding = length < width ? new Array(width - length + 1).join(fill) : ""; // If the fill character is "0", grouping is applied after padding.
 
-	        var editor = body.selectAll('.note-editor')
-	            .data([0]);
+	      if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = ""; // Reconstruct the final output based on the desired alignment.
 
-	        editor.enter()
-	            .append('div')
-	            .attr('class', 'modal-section note-editor')
-	            .merge(editor)
-	            .call(noteHeader.note(_note))
-	            .call(noteComments.note(_note))
-	            .call(noteSaveSection);
+	      switch (align) {
+	        case "<":
+	          value = valuePrefix + value + valueSuffix + padding;
+	          break;
 
-	        var footer = selection.selectAll('.footer')
-	            .data([0]);
+	        case "=":
+	          value = valuePrefix + padding + value + valueSuffix;
+	          break;
 
-	        footer.enter()
-	            .append('div')
-	            .attr('class', 'footer')
-	            .merge(footer)
-	            .call(uiViewOnOSM(context).what(_note))
-	            .call(uiNoteReport().note(_note));
+	        case "^":
+	          value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length);
+	          break;
 
+	        default:
+	          value = padding + valuePrefix + value + valueSuffix;
+	          break;
+	      }
 
-	        // rerender the note editor on any auth change
-	        var osm = services.osm;
-	        if (osm) {
-	            osm.on('change.note-save', function() {
-	                selection.call(noteEditor);
-	            });
-	        }
+	      return numerals(value);
 	    }
 
+	    format.toString = function () {
+	      return specifier + "";
+	    };
 
-	    function noteSaveSection(selection) {
-	        var isSelected = (_note && _note.id === context.selectedNoteID());
-	        var noteSave = selection.selectAll('.note-save')
-	            .data((isSelected ? [_note] : []), function(d) { return d.status + d.id; });
-
-	        // exit
-	        noteSave.exit()
-	            .remove();
-
-	        // enter
-	        var noteSaveEnter = noteSave.enter()
-	            .append('div')
-	            .attr('class', 'note-save save-section cf');
-
-	        // // if new note, show categories to pick from
-	        // if (_note.isNew()) {
-	        //     var presets = presetManager;
-
-	        //     // NOTE: this key isn't a age and therefore there is no documentation (yet)
-	        //     _fieldsArr = [
-	        //         uiField(context, presets.field('category'), null, { show: true, revert: false }),
-	        //     ];
-
-	        //     _fieldsArr.forEach(function(field) {
-	        //         field
-	        //             .on('change', changeCategory);
-	        //     });
-
-	        //     noteSaveEnter
-	        //         .append('div')
-	        //         .attr('class', 'note-category')
-	        //         .call(formFields.fieldsArr(_fieldsArr));
-	        // }
-
-	        // function changeCategory() {
-	        //     // NOTE: perhaps there is a better way to get value
-	        //     var val = context.container().select('input[name=\'category\']:checked').property('__data__') || undefined;
-
-	        //     // store the unsaved category with the note itself
-	        //     _note = _note.update({ newCategory: val });
-	        //     var osm = services.osm;
-	        //     if (osm) {
-	        //         osm.replaceNote(_note);  // update note cache
-	        //     }
-	        //     noteSave
-	        //         .call(noteSaveButtons);
-	        // }
-
-	        noteSaveEnter
-	            .append('h4')
-	            .attr('class', '.note-save-header')
-	            .text(function() {
-	                return _note.isNew() ? _t('note.newDescription') : _t('note.newComment');
-	            });
+	    return format;
+	  }
 
-	        var commentTextarea = noteSaveEnter
-	            .append('textarea')
-	            .attr('class', 'new-comment-input')
-	            .attr('placeholder', _t('note.inputPlaceholder'))
-	            .attr('maxlength', 1000)
-	            .property('value', function(d) { return d.newComment; })
-	            .call(utilNoAuto)
-	            .on('keydown.note-input', keydown)
-	            .on('input.note-input', changeInput)
-	            .on('blur.note-input', changeInput);
+	  function formatPrefix(specifier, value) {
+	    var f = newFormat((specifier = formatSpecifier(specifier), specifier.type = "f", specifier)),
+	        e = Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3,
+	        k = Math.pow(10, -e),
+	        prefix = prefixes[8 + e / 3];
+	    return function (value) {
+	      return f(k * value) + prefix;
+	    };
+	  }
 
-	        if (_newNote) {
-	            // autofocus the comment field for new notes
-	            commentTextarea.node().focus();
-	        }
+	  return {
+	    format: newFormat,
+	    formatPrefix: formatPrefix
+	  };
+	}
 
-	        // update
-	        noteSave = noteSaveEnter
-	            .merge(noteSave)
-	            .call(userDetails)
-	            .call(noteSaveButtons);
+	var locale;
+	var format$1;
+	var formatPrefix;
+	defaultLocale({
+	  thousands: ",",
+	  grouping: [3],
+	  currency: ["$", ""]
+	});
+	function defaultLocale(definition) {
+	  locale = formatLocale(definition);
+	  format$1 = locale.format;
+	  formatPrefix = locale.formatPrefix;
+	  return locale;
+	}
 
+	function precisionFixed (step) {
+	  return Math.max(0, -exponent(Math.abs(step)));
+	}
 
-	        // fast submit if user presses cmd+enter
-	        function keydown() {
-	            if (!(event.keyCode === 13 && event.metaKey)) { return; }
+	function precisionPrefix (step, value) {
+	  return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3 - exponent(Math.abs(step)));
+	}
 
-	            var osm = services.osm;
-	            if (!osm) { return; }
+	function precisionRound (step, max) {
+	  step = Math.abs(step), max = Math.abs(max) - step;
+	  return Math.max(0, exponent(max) - exponent(step)) + 1;
+	}
 
-	            var hasAuth = osm.authenticated();
-	            if (!hasAuth) { return; }
+	function tickFormat(start, stop, count, specifier) {
+	  var step = tickStep(start, stop, count),
+	      precision;
+	  specifier = formatSpecifier(specifier == null ? ",f" : specifier);
 
-	            if (!_note.newComment) { return; }
+	  switch (specifier.type) {
+	    case "s":
+	      {
+	        var value = Math.max(Math.abs(start), Math.abs(stop));
+	        if (specifier.precision == null && !isNaN(precision = precisionPrefix(step, value))) specifier.precision = precision;
+	        return formatPrefix(specifier, value);
+	      }
 
-	            event.preventDefault();
+	    case "":
+	    case "e":
+	    case "g":
+	    case "p":
+	    case "r":
+	      {
+	        if (specifier.precision == null && !isNaN(precision = precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) specifier.precision = precision - (specifier.type === "e");
+	        break;
+	      }
 
-	            select(this)
-	                .on('keydown.note-input', null);
+	    case "f":
+	    case "%":
+	      {
+	        if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === "%") * 2;
+	        break;
+	      }
+	  }
 
-	            // focus on button and submit
-	            window.setTimeout(function() {
-	                if (_note.isNew()) {
-	                    noteSave.selectAll('.save-button').node().focus();
-	                    clickSave(_note);
-	                } else  {
-	                    noteSave.selectAll('.comment-button').node().focus();
-	                    clickComment(_note);
-	                }
-	            }, 10);
-	        }
+	  return format$1(specifier);
+	}
 
+	function linearish(scale) {
+	  var domain = scale.domain;
 
-	        function changeInput() {
-	            var input = select(this);
-	            var val = input.property('value').trim() || undefined;
+	  scale.ticks = function (count) {
+	    var d = domain();
+	    return ticks(d[0], d[d.length - 1], count == null ? 10 : count);
+	  };
 
-	            // store the unsaved comment with the note itself
-	            _note = _note.update({ newComment: val });
+	  scale.tickFormat = function (count, specifier) {
+	    var d = domain();
+	    return tickFormat(d[0], d[d.length - 1], count == null ? 10 : count, specifier);
+	  };
 
-	            var osm = services.osm;
-	            if (osm) {
-	                osm.replaceNote(_note);  // update note cache
-	            }
+	  scale.nice = function (count) {
+	    if (count == null) count = 10;
+	    var d = domain();
+	    var i0 = 0;
+	    var i1 = d.length - 1;
+	    var start = d[i0];
+	    var stop = d[i1];
+	    var prestep;
+	    var step;
+	    var maxIter = 10;
 
-	            noteSave
-	                .call(noteSaveButtons);
-	        }
+	    if (stop < start) {
+	      step = start, start = stop, stop = step;
+	      step = i0, i0 = i1, i1 = step;
 	    }
 
+	    while (maxIter-- > 0) {
+	      step = tickIncrement(start, stop, count);
 
-	    function userDetails(selection) {
-	        var detailSection = selection.selectAll('.detail-section')
-	            .data([0]);
-
-	        detailSection = detailSection.enter()
-	            .append('div')
-	            .attr('class', 'detail-section')
-	            .merge(detailSection);
+	      if (step === prestep) {
+	        d[i0] = start;
+	        d[i1] = stop;
+	        return domain(d);
+	      } else if (step > 0) {
+	        start = Math.floor(start / step) * step;
+	        stop = Math.ceil(stop / step) * step;
+	      } else if (step < 0) {
+	        start = Math.ceil(start * step) / step;
+	        stop = Math.floor(stop * step) / step;
+	      } else {
+	        break;
+	      }
 
-	        var osm = services.osm;
-	        if (!osm) { return; }
-
-	        // Add warning if user is not logged in
-	        var hasAuth = osm.authenticated();
-	        var authWarning = detailSection.selectAll('.auth-warning')
-	            .data(hasAuth ? [] : [0]);
-
-	        authWarning.exit()
-	            .transition()
-	            .duration(200)
-	            .style('opacity', 0)
-	            .remove();
-
-	        var authEnter = authWarning.enter()
-	            .insert('div', '.tag-reference-body')
-	            .attr('class', 'field-warning auth-warning')
-	            .style('opacity', 0);
-
-	        authEnter
-	            .call(svgIcon('#iD-icon-alert', 'inline'));
-
-	        authEnter
-	            .append('span')
-	            .text(_t('note.login'));
-
-	        authEnter
-	            .append('a')
-	            .attr('target', '_blank')
-	            .call(svgIcon('#iD-icon-out-link', 'inline'))
-	            .append('span')
-	            .text(_t('login'))
-	            .on('click.note-login', function() {
-	                event.preventDefault();
-	                osm.authenticate();
-	            });
+	      prestep = step;
+	    }
 
-	        authEnter
-	            .transition()
-	            .duration(200)
-	            .style('opacity', 1);
+	    return scale;
+	  };
 
+	  return scale;
+	}
+	function linear() {
+	  var scale = continuous();
 
-	        var prose = detailSection.selectAll('.note-save-prose')
-	            .data(hasAuth ? [0] : []);
+	  scale.copy = function () {
+	    return copy(scale, linear());
+	  };
 
-	        prose.exit()
-	            .remove();
+	  initRange.apply(scale, arguments);
+	  return linearish(scale);
+	}
 
-	        prose = prose.enter()
-	            .append('p')
-	            .attr('class', 'note-save-prose')
-	            .text(_t('note.upload_explanation'))
-	            .merge(prose);
+	// eslint-disable-next-line es/no-math-expm1 -- safe
+	var $expm1 = Math.expm1;
+	var exp$1 = Math.exp;
 
-	        osm.userDetails(function(err, user) {
-	            if (err) { return; }
+	// `Math.expm1` method implementation
+	// https://tc39.es/ecma262/#sec-math.expm1
+	var mathExpm1 = (!$expm1
+	  // Old FF bug
+	  || $expm1(10) > 22025.465794806719 || $expm1(10) < 22025.4657948067165168
+	  // Tor Browser bug
+	  || $expm1(-2e-17) != -2e-17
+	) ? function expm1(x) {
+	  return (x = +x) == 0 ? x : x > -1e-6 && x < 1e-6 ? x + x * x / 2 : exp$1(x) - 1;
+	} : $expm1;
 
-	            var userLink = select(document.createElement('div'));
+	function quantize() {
+	  var x0 = 0,
+	      x1 = 1,
+	      n = 1,
+	      domain = [0.5],
+	      range = [0, 1],
+	      unknown;
 
-	            if (user.image_url) {
-	                userLink
-	                    .append('img')
-	                    .attr('src', user.image_url)
-	                    .attr('class', 'icon pre-text user-icon');
-	            }
+	  function scale(x) {
+	    return x != null && x <= x ? range[bisectRight(domain, x, 0, n)] : unknown;
+	  }
 
-	            userLink
-	                .append('a')
-	                .attr('class', 'user-info')
-	                .text(user.display_name)
-	                .attr('href', osm.userURL(user.display_name))
-	                .attr('tabindex', -1)
-	                .attr('target', '_blank');
+	  function rescale() {
+	    var i = -1;
+	    domain = new Array(n);
 
-	            prose
-	                .html(_t('note.upload_explanation_with_user', { user: userLink.html() }));
-	        });
+	    while (++i < n) {
+	      domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);
 	    }
 
+	    return scale;
+	  }
 
-	    function noteSaveButtons(selection) {
-	        var osm = services.osm;
-	        var hasAuth = osm && osm.authenticated();
+	  scale.domain = function (_) {
+	    var _ref, _ref2;
 
-	        var isSelected = (_note && _note.id === context.selectedNoteID());
-	        var buttonSection = selection.selectAll('.buttons')
-	            .data((isSelected ? [_note] : []), function(d) { return d.status + d.id; });
+	    return arguments.length ? ((_ref = _, _ref2 = _slicedToArray(_ref, 2), x0 = _ref2[0], x1 = _ref2[1], _ref), x0 = +x0, x1 = +x1, rescale()) : [x0, x1];
+	  };
 
-	        // exit
-	        buttonSection.exit()
-	            .remove();
+	  scale.range = function (_) {
+	    return arguments.length ? (n = (range = Array.from(_)).length - 1, rescale()) : range.slice();
+	  };
 
-	        // enter
-	        var buttonEnter = buttonSection.enter()
-	            .append('div')
-	            .attr('class', 'buttons');
+	  scale.invertExtent = function (y) {
+	    var i = range.indexOf(y);
+	    return i < 0 ? [NaN, NaN] : i < 1 ? [x0, domain[0]] : i >= n ? [domain[n - 1], x1] : [domain[i - 1], domain[i]];
+	  };
 
-	        if (_note.isNew()) {
-	            buttonEnter
-	                .append('button')
-	                .attr('class', 'button cancel-button secondary-action')
-	                .text(_t('confirm.cancel'));
+	  scale.unknown = function (_) {
+	    return arguments.length ? (unknown = _, scale) : scale;
+	  };
 
-	            buttonEnter
-	                .append('button')
-	                .attr('class', 'button save-button action')
-	                .text(_t('note.save'));
+	  scale.thresholds = function () {
+	    return domain.slice();
+	  };
 
-	        } else {
-	            buttonEnter
-	                .append('button')
-	                .attr('class', 'button status-button action');
+	  scale.copy = function () {
+	    return quantize().domain([x0, x1]).range(range).unknown(unknown);
+	  };
 
-	            buttonEnter
-	                .append('button')
-	                .attr('class', 'button comment-button action')
-	                .text(_t('note.comment'));
-	        }
+	  return initRange.apply(linearish(scale), arguments);
+	}
 
+	// https://github.com/tc39/proposal-string-pad-start-end
+	var toLength$2 = toLength$q;
+	var repeat$1 = stringRepeat;
+	var requireObjectCoercible$2 = requireObjectCoercible$e;
+
+	var ceil = Math.ceil;
+
+	// `String.prototype.{ padStart, padEnd }` methods implementation
+	var createMethod = function (IS_END) {
+	  return function ($this, maxLength, fillString) {
+	    var S = String(requireObjectCoercible$2($this));
+	    var stringLength = S.length;
+	    var fillStr = fillString === undefined ? ' ' : String(fillString);
+	    var intMaxLength = toLength$2(maxLength);
+	    var fillLen, stringFiller;
+	    if (intMaxLength <= stringLength || fillStr == '') return S;
+	    fillLen = intMaxLength - stringLength;
+	    stringFiller = repeat$1.call(fillStr, ceil(fillLen / fillStr.length));
+	    if (stringFiller.length > fillLen) stringFiller = stringFiller.slice(0, fillLen);
+	    return IS_END ? S + stringFiller : stringFiller + S;
+	  };
+	};
+
+	var stringPad = {
+	  // `String.prototype.padStart` method
+	  // https://tc39.es/ecma262/#sec-string.prototype.padstart
+	  start: createMethod(false),
+	  // `String.prototype.padEnd` method
+	  // https://tc39.es/ecma262/#sec-string.prototype.padend
+	  end: createMethod(true)
+	};
+
+	var fails$2 = fails$N;
+	var padStart = stringPad.start;
+
+	var abs$1 = Math.abs;
+	var DatePrototype = Date.prototype;
+	var getTime = DatePrototype.getTime;
+	var nativeDateToISOString = DatePrototype.toISOString;
+
+	// `Date.prototype.toISOString` method implementation
+	// https://tc39.es/ecma262/#sec-date.prototype.toisostring
+	// PhantomJS / old WebKit fails here:
+	var dateToIsoString = (fails$2(function () {
+	  return nativeDateToISOString.call(new Date(-5e13 - 1)) != '0385-07-25T07:06:39.999Z';
+	}) || !fails$2(function () {
+	  nativeDateToISOString.call(new Date(NaN));
+	})) ? function toISOString() {
+	  if (!isFinite(getTime.call(this))) throw RangeError('Invalid time value');
+	  var date = this;
+	  var year = date.getUTCFullYear();
+	  var milliseconds = date.getUTCMilliseconds();
+	  var sign = year < 0 ? '-' : year > 9999 ? '+' : '';
+	  return sign + padStart(abs$1(year), sign ? 6 : 4, 0) +
+	    '-' + padStart(date.getUTCMonth() + 1, 2, 0) +
+	    '-' + padStart(date.getUTCDate(), 2, 0) +
+	    'T' + padStart(date.getUTCHours(), 2, 0) +
+	    ':' + padStart(date.getUTCMinutes(), 2, 0) +
+	    ':' + padStart(date.getUTCSeconds(), 2, 0) +
+	    '.' + padStart(milliseconds, 3, 0) +
+	    'Z';
+	} : nativeDateToISOString;
+
+	var $$6 = _export;
+	var toISOString = dateToIsoString;
+
+	// `Date.prototype.toISOString` method
+	// https://tc39.es/ecma262/#sec-date.prototype.toisostring
+	// PhantomJS / old WebKit has a broken implementations
+	$$6({ target: 'Date', proto: true, forced: Date.prototype.toISOString !== toISOString }, {
+	  toISOString: toISOString
+	});
 
-	        // update
-	        buttonSection = buttonSection
-	            .merge(buttonEnter);
+	function behaviorBreathe() {
+	  var duration = 800;
+	  var steps = 4;
+	  var selector = '.selected.shadow, .selected .shadow';
 
-	        buttonSection.select('.cancel-button')   // select and propagate data
-	            .on('click.cancel', clickCancel);
+	  var _selected = select(null);
 
-	        buttonSection.select('.save-button')     // select and propagate data
-	            .attr('disabled', isSaveDisabled)
-	            .on('click.save', clickSave);
+	  var _classed = '';
+	  var _params = {};
+	  var _done = false;
 
-	        buttonSection.select('.status-button')   // select and propagate data
-	            .attr('disabled', (hasAuth ? null : true))
-	            .text(function(d) {
-	                var action = (d.status === 'open' ? 'close' : 'open');
-	                var andComment = (d.newComment ? '_comment' : '');
-	                return _t('note.' + action + andComment);
-	            })
-	            .on('click.status', clickStatus);
+	  var _timer;
 
-	        buttonSection.select('.comment-button')   // select and propagate data
-	            .attr('disabled', isSaveDisabled)
-	            .on('click.comment', clickComment);
+	  function ratchetyInterpolator(a, b, steps, units) {
+	    a = parseFloat(a);
+	    b = parseFloat(b);
+	    var sample = quantize().domain([0, 1]).range(d3_quantize(d3_interpolateNumber(a, b), steps));
+	    return function (t) {
+	      return String(sample(t)) + (units || '');
+	    };
+	  }
 
+	  function reset(selection) {
+	    selection.style('stroke-opacity', null).style('stroke-width', null).style('fill-opacity', null).style('r', null);
+	  }
 
-	        function isSaveDisabled(d) {
-	            return (hasAuth && d.status === 'open' && d.newComment) ? null : true;
-	        }
-	    }
+	  function setAnimationParams(transition, fromTo) {
+	    var toFrom = fromTo === 'from' ? 'to' : 'from';
+	    transition.styleTween('stroke-opacity', function (d) {
+	      return ratchetyInterpolator(_params[d.id][toFrom].opacity, _params[d.id][fromTo].opacity, steps);
+	    }).styleTween('stroke-width', function (d) {
+	      return ratchetyInterpolator(_params[d.id][toFrom].width, _params[d.id][fromTo].width, steps, 'px');
+	    }).styleTween('fill-opacity', function (d) {
+	      return ratchetyInterpolator(_params[d.id][toFrom].opacity, _params[d.id][fromTo].opacity, steps);
+	    }).styleTween('r', function (d) {
+	      return ratchetyInterpolator(_params[d.id][toFrom].width, _params[d.id][fromTo].width, steps, 'px');
+	    });
+	  }
 
+	  function calcAnimationParams(selection) {
+	    selection.call(reset).each(function (d) {
+	      var s = select(this);
+	      var tag = s.node().tagName;
+	      var p = {
+	        'from': {},
+	        'to': {}
+	      };
+	      var opacity;
+	      var width; // determine base opacity and width
 
+	      if (tag === 'circle') {
+	        opacity = parseFloat(s.style('fill-opacity') || 0.5);
+	        width = parseFloat(s.style('r') || 15.5);
+	      } else {
+	        opacity = parseFloat(s.style('stroke-opacity') || 0.7);
+	        width = parseFloat(s.style('stroke-width') || 10);
+	      } // calculate from/to interpolation params..
 
-	    function clickCancel(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var osm = services.osm;
-	        if (osm) {
-	            osm.removeNote(d);
-	        }
-	        context.enter(modeBrowse(context));
-	        dispatch$1.call('change');
-	    }
 
+	      p.tag = tag;
+	      p.from.opacity = opacity * 0.6;
+	      p.to.opacity = opacity * 1.25;
+	      p.from.width = width * 0.7;
+	      p.to.width = width * (tag === 'circle' ? 1.5 : 1);
+	      _params[d.id] = p;
+	    });
+	  }
 
-	    function clickSave(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var osm = services.osm;
-	        if (osm) {
-	            osm.postNoteCreate(d, function(err, note) {
-	                dispatch$1.call('change', note);
-	            });
-	        }
-	    }
+	  function run(surface, fromTo) {
+	    var toFrom = fromTo === 'from' ? 'to' : 'from';
+	    var currSelected = surface.selectAll(selector);
+	    var currClassed = surface.attr('class');
 
+	    if (_done || currSelected.empty()) {
+	      _selected.call(reset);
 
-	    function clickStatus(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var osm = services.osm;
-	        if (osm) {
-	            var setStatus = (d.status === 'open' ? 'closed' : 'open');
-	            osm.postNoteUpdate(d, setStatus, function(err, note) {
-	                dispatch$1.call('change', note);
-	            });
-	        }
+	      _selected = select(null);
+	      return;
 	    }
 
-	    function clickComment(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var osm = services.osm;
-	        if (osm) {
-	            osm.postNoteUpdate(d, d.status, function(err, note) {
-	                dispatch$1.call('change', note);
-	            });
-	        }
-	    }
+	    if (!fastDeepEqual(currSelected.data(), _selected.data()) || currClassed !== _classed) {
+	      _selected.call(reset);
 
+	      _classed = currClassed;
+	      _selected = currSelected.call(calcAnimationParams);
+	    }
 
-	    noteEditor.note = function(val) {
-	        if (!arguments.length) { return _note; }
-	        _note = val;
-	        return noteEditor;
-	    };
+	    var didCallNextRun = false;
 
-	    noteEditor.newNote = function(val) {
-	        if (!arguments.length) { return _newNote; }
-	        _newNote = val;
-	        return noteEditor;
-	    };
+	    _selected.transition().duration(duration).call(setAnimationParams, fromTo).on('end', function () {
+	      // `end` event is called for each selected element, but we want
+	      // it to run only once
+	      if (!didCallNextRun) {
+	        surface.call(run, toFrom);
+	        didCallNextRun = true;
+	      } // if entity was deselected, remove breathe styling
 
 
-	    return utilRebind(noteEditor, dispatch$1, 'on');
-	}
+	      if (!select(this).classed('selected')) {
+	        reset(select(this));
+	      }
+	    });
+	  }
 
-	function modeSelectNote(context, selectedNoteID) {
-	    var mode = {
-	        id: 'select-note',
-	        button: 'browse'
-	    };
+	  function behavior(surface) {
+	    _done = false;
+	    _timer = timer(function () {
+	      // wait for elements to actually become selected
+	      if (surface.selectAll(selector).empty()) {
+	        return false;
+	      }
 
-	    var _keybinding = utilKeybinding('select-note');
-	    var _noteEditor = uiNoteEditor(context)
-	        .on('change', function() {
-	            context.map().pan([0,0]);  // trigger a redraw
-	            var note = checkSelectedID();
-	            if (!note) { return; }
-	            context.ui().sidebar
-	                .show(_noteEditor.note(note));
-	        });
+	      surface.call(run, 'from');
 
-	    var _behaviors = [
-	        behaviorBreathe(),
-	        behaviorHover(context),
-	        behaviorSelect(context),
-	        behaviorLasso(context),
-	        modeDragNode(context).behavior,
-	        modeDragNote(context).behavior
-	    ];
+	      _timer.stop();
 
-	    var _newFeature = false;
+	      return true;
+	    }, 20);
+	  }
 
+	  behavior.restartIfNeeded = function (surface) {
+	    if (_selected.empty()) {
+	      surface.call(run, 'from');
 
-	    function checkSelectedID() {
-	        if (!services.osm) { return; }
-	        var note = services.osm.getNote(selectedNoteID);
-	        if (!note) {
-	            context.enter(modeBrowse(context));
-	        }
-	        return note;
+	      if (_timer) {
+	        _timer.stop();
+	      }
 	    }
+	  };
 
+	  behavior.off = function () {
+	    _done = true;
 
-	    // class the note as selected, or return to browse mode if the note is gone
-	    function selectNote(drawn) {
-	        if (!checkSelectedID()) { return; }
+	    if (_timer) {
+	      _timer.stop();
+	    }
 
-	        var selection = context.surface().selectAll('.layer-notes .note-' + selectedNoteID);
+	    _selected.interrupt().call(reset);
+	  };
 
-	        if (selection.empty()) {
-	            // Return to browse mode if selected DOM elements have
-	            // disappeared because the user moved them out of view..
-	            var source = event && event.type === 'zoom' && event.sourceEvent;
-	            if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
-	                context.enter(modeBrowse(context));
-	            }
+	  return behavior;
+	}
 
-	        } else {
-	            selection
-	                .classed('selected', true);
+	/* Creates a keybinding behavior for an operation */
+	function behaviorOperation(context) {
+	  var _operation;
 
-	            context.selectedNoteID(selectedNoteID);
-	        }
-	    }
+	  function keypress(d3_event) {
+	    // prevent operations during low zoom selection
+	    if (!context.map().withinEditableZoom()) return;
+	    if (_operation.availableForKeypress && !_operation.availableForKeypress()) return;
+	    d3_event.preventDefault();
 
+	    var disabled = _operation.disabled();
 
-	    function esc() {
-	        if (context.container().select('.combobox').size()) { return; }
-	        context.enter(modeBrowse(context));
+	    if (disabled) {
+	      context.ui().flash.duration(4000).iconName('#iD-operation-' + _operation.id).iconClass('operation disabled').label(_operation.tooltip)();
+	    } else {
+	      context.ui().flash.duration(2000).iconName('#iD-operation-' + _operation.id).iconClass('operation').label(_operation.annotation() || _operation.title)();
+	      if (_operation.point) _operation.point(null);
+
+	      _operation();
 	    }
+	  }
 
+	  function behavior() {
+	    if (_operation && _operation.available()) {
+	      context.keybinding().on(_operation.keys, keypress);
+	    }
 
-	    mode.zoomToSelected = function() {
-	        if (!services.osm) { return; }
-	        var note = services.osm.getNote(selectedNoteID);
-	        if (note) {
-	            context.map().centerZoomEase(note.loc, 20);
-	        }
-	    };
+	    return behavior;
+	  }
 
+	  behavior.off = function () {
+	    context.keybinding().off(_operation.keys);
+	  };
 
-	    mode.newFeature = function(val) {
-	        if (!arguments.length) { return _newFeature; }
-	        _newFeature = val;
-	        return mode;
-	    };
+	  behavior.which = function (_) {
+	    if (!arguments.length) return _operation;
+	    _operation = _;
+	    return behavior;
+	  };
 
+	  return behavior;
+	}
 
-	    mode.enter = function() {
-	        var note = checkSelectedID();
-	        if (!note) { return; }
+	function operationCircularize(context, selectedIDs) {
+	  var _extent;
 
-	        _behaviors.forEach(context.install);
+	  var _actions = selectedIDs.map(getAction).filter(Boolean);
 
-	        _keybinding
-	            .on(_t('inspector.zoom_to.key'), mode.zoomToSelected)
-	            .on('⎋', esc, true);
+	  var _amount = _actions.length === 1 ? 'single' : 'multiple';
 
-	        select(document)
-	            .call(_keybinding);
+	  var _coords = utilGetAllNodes(selectedIDs, context.graph()).map(function (n) {
+	    return n.loc;
+	  });
 
-	        selectNote();
+	  function getAction(entityID) {
+	    var entity = context.entity(entityID);
+	    if (entity.type !== 'way' || new Set(entity.nodes).size <= 1) return null;
 
-	        var sidebar = context.ui().sidebar;
-	        sidebar.show(_noteEditor.note(note).newNote(_newFeature));
+	    if (!_extent) {
+	      _extent = entity.extent(context.graph());
+	    } else {
+	      _extent = _extent.extend(entity.extent(context.graph()));
+	    }
 
-	        // expand the sidebar, avoid obscuring the note if needed
-	        sidebar.expand(sidebar.intersects(note.extent()));
+	    return actionCircularize(entityID, context.projection);
+	  }
 
-	        context.map()
-	            .on('drawn.select', selectNote);
-	    };
+	  var operation = function operation() {
+	    if (!_actions.length) return;
 
+	    var combinedAction = function combinedAction(graph, t) {
+	      _actions.forEach(function (action) {
+	        if (!action.disabled(graph)) {
+	          graph = action(graph, t);
+	        }
+	      });
 
-	    mode.exit = function() {
-	        _behaviors.forEach(context.uninstall);
+	      return graph;
+	    };
 
-	        select(document)
-	            .call(_keybinding.unbind);
+	    combinedAction.transitionable = true;
+	    context.perform(combinedAction, operation.annotation());
+	    window.setTimeout(function () {
+	      context.validator().validate();
+	    }, 300); // after any transition
+	  };
 
-	        context.surface()
-	            .selectAll('.layer-notes .selected')
-	            .classed('selected hover', false);
+	  operation.available = function () {
+	    return _actions.length && selectedIDs.length === _actions.length;
+	  }; // don't cache this because the visible extent could change
 
-	        context.map()
-	            .on('drawn.select', null);
 
-	        context.ui().sidebar
-	            .hide();
+	  operation.disabled = function () {
+	    if (!_actions.length) return '';
 
-	        context.selectedNoteID(null);
-	    };
+	    var actionDisableds = _actions.map(function (action) {
+	      return action.disabled(context.graph());
+	    }).filter(Boolean);
 
+	    if (actionDisableds.length === _actions.length) {
+	      // none of the features can be circularized
+	      if (new Set(actionDisableds).size > 1) {
+	        return 'multiple_blockers';
+	      }
 
-	    return mode;
-	}
+	      return actionDisableds[0];
+	    } else if (_extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    } else if (someMissing()) {
+	      return 'not_downloaded';
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
+	    }
 
-	function modeDragNote(context) {
-	    var mode = {
-	        id: 'drag-note',
-	        button: 'browse'
-	    };
+	    return false;
 
-	    var edit = behaviorEdit(context);
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	    var _nudgeInterval;
-	    var _lastLoc;
-	    var _note;    // most current note.. dragged note may have stale datum.
+	      if (osm) {
+	        var missing = _coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
+	        }
+	      }
 
-	    function startNudge(nudge) {
-	        if (_nudgeInterval) { window.clearInterval(_nudgeInterval); }
-	        _nudgeInterval = window.setInterval(function() {
-	            context.map().pan(nudge);
-	            doMove(nudge);
-	        }, 50);
+	      return false;
 	    }
+	  };
 
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.circularize.' + disable + '.' + _amount) : _t('operations.circularize.description.' + _amount);
+	  };
 
-	    function stopNudge() {
-	        if (_nudgeInterval) {
-	            window.clearInterval(_nudgeInterval);
-	            _nudgeInterval = null;
-	        }
-	    }
+	  operation.annotation = function () {
+	    return _t('operations.circularize.annotation.feature', {
+	      n: _actions.length
+	    });
+	  };
 
+	  operation.id = 'circularize';
+	  operation.keys = [_t('operations.circularize.key')];
+	  operation.title = _t('operations.circularize.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	    function origin(note) {
-	        return context.projection(note.loc);
-	    }
+	// For example, ⌘Z -> Ctrl+Z
 
+	var uiCmd = function uiCmd(code) {
+	  var detected = utilDetect();
 
-	    function start(note) {
-	        _note = note;
-	        var osm = services.osm;
-	        if (osm) {
-	            // Get latest note from cache.. The marker may have a stale datum bound to it
-	            // and dragging it around can sometimes delete the users note comment.
-	            _note = osm.getNote(_note.id);
-	        }
+	  if (detected.os === 'mac') {
+	    return code;
+	  }
+
+	  if (detected.os === 'win') {
+	    if (code === '⌘⇧Z') return 'Ctrl+Y';
+	  }
 
-	        context.surface().selectAll('.note-' + _note.id)
-	            .classed('active', true);
+	  var result = '',
+	      replacements = {
+	    '⌘': 'Ctrl',
+	    '⇧': 'Shift',
+	    '⌥': 'Alt',
+	    '⌫': 'Backspace',
+	    '⌦': 'Delete'
+	  };
 
-	        context.perform(actionNoop());
-	        context.enter(mode);
-	        context.selectedNoteID(_note.id);
+	  for (var i = 0; i < code.length; i++) {
+	    if (code[i] in replacements) {
+	      result += replacements[code[i]] + (i < code.length - 1 ? '+' : '');
+	    } else {
+	      result += code[i];
 	    }
+	  }
 
+	  return result;
+	}; // return a display-focused string for a given keyboard code
 
-	    function move() {
-	        event.sourceEvent.stopPropagation();
-	        _lastLoc = context.projection.invert(event.point);
+	uiCmd.display = function (code) {
+	  if (code.length !== 1) return code;
+	  var detected = utilDetect();
+	  var mac = detected.os === 'mac';
+	  var replacements = {
+	    '⌘': mac ? '⌘ ' + _t('shortcuts.key.cmd') : _t('shortcuts.key.ctrl'),
+	    '⇧': mac ? '⇧ ' + _t('shortcuts.key.shift') : _t('shortcuts.key.shift'),
+	    '⌥': mac ? '⌥ ' + _t('shortcuts.key.option') : _t('shortcuts.key.alt'),
+	    '⌃': mac ? '⌃ ' + _t('shortcuts.key.ctrl') : _t('shortcuts.key.ctrl'),
+	    '⌫': mac ? '⌫ ' + _t('shortcuts.key.delete') : _t('shortcuts.key.backspace'),
+	    '⌦': mac ? '⌦ ' + _t('shortcuts.key.del') : _t('shortcuts.key.del'),
+	    '↖': mac ? '↖ ' + _t('shortcuts.key.pgup') : _t('shortcuts.key.pgup'),
+	    '↘': mac ? '↘ ' + _t('shortcuts.key.pgdn') : _t('shortcuts.key.pgdn'),
+	    '⇞': mac ? '⇞ ' + _t('shortcuts.key.home') : _t('shortcuts.key.home'),
+	    '⇟': mac ? '⇟ ' + _t('shortcuts.key.end') : _t('shortcuts.key.end'),
+	    '↵': mac ? '⏎ ' + _t('shortcuts.key.return') : _t('shortcuts.key.enter'),
+	    '⎋': mac ? '⎋ ' + _t('shortcuts.key.esc') : _t('shortcuts.key.esc'),
+	    '☰': mac ? '☰ ' + _t('shortcuts.key.menu') : _t('shortcuts.key.menu')
+	  };
+	  return replacements[code] || code;
+	};
 
-	        doMove();
-	        var nudge = geoViewportEdge(event.point, context.map().dimensions());
-	        if (nudge) {
-	            startNudge(nudge);
+	function operationDelete(context, selectedIDs) {
+	  var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+	  var action = actionDeleteMultiple(selectedIDs);
+	  var nodes = utilGetAllNodes(selectedIDs, context.graph());
+	  var coords = nodes.map(function (n) {
+	    return n.loc;
+	  });
+	  var extent = utilTotalExtent(selectedIDs, context.graph());
+
+	  var operation = function operation() {
+	    var nextSelectedID;
+	    var nextSelectedLoc;
+
+	    if (selectedIDs.length === 1) {
+	      var id = selectedIDs[0];
+	      var entity = context.entity(id);
+	      var geometry = entity.geometry(context.graph());
+	      var parents = context.graph().parentWays(entity);
+	      var parent = parents[0]; // Select the next closest node in the way.
+
+	      if (geometry === 'vertex') {
+	        var nodes = parent.nodes;
+	        var i = nodes.indexOf(id);
+
+	        if (i === 0) {
+	          i++;
+	        } else if (i === nodes.length - 1) {
+	          i--;
 	        } else {
-	            stopNudge();
+	          var a = geoSphericalDistance(entity.loc, context.entity(nodes[i - 1]).loc);
+	          var b = geoSphericalDistance(entity.loc, context.entity(nodes[i + 1]).loc);
+	          i = a < b ? i - 1 : i + 1;
 	        }
+
+	        nextSelectedID = nodes[i];
+	        nextSelectedLoc = context.entity(nextSelectedID).loc;
+	      }
 	    }
 
+	    context.perform(action, operation.annotation());
+	    context.validator().validate();
 
-	    function doMove(nudge) {
-	        nudge = nudge || [0, 0];
+	    if (nextSelectedID && nextSelectedLoc) {
+	      if (context.hasEntity(nextSelectedID)) {
+	        context.enter(modeSelect(context, [nextSelectedID]).follow(true));
+	      } else {
+	        context.map().centerEase(nextSelectedLoc);
+	        context.enter(modeBrowse(context));
+	      }
+	    } else {
+	      context.enter(modeBrowse(context));
+	    }
+	  };
 
-	        var currPoint = (event && event.point) || context.projection(_lastLoc);
-	        var currMouse = geoVecSubtract(currPoint, nudge);
-	        var loc = context.projection.invert(currMouse);
+	  operation.available = function () {
+	    return true;
+	  };
 
-	        _note = _note.move(loc);
+	  operation.disabled = function () {
+	    if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    } else if (someMissing()) {
+	      return 'not_downloaded';
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
+	    } else if (selectedIDs.some(protectedMember)) {
+	      return 'part_of_relation';
+	    } else if (selectedIDs.some(incompleteRelation)) {
+	      return 'incomplete_relation';
+	    } else if (selectedIDs.some(hasWikidataTag)) {
+	      return 'has_wikidata_tag';
+	    }
 
-	        var osm = services.osm;
-	        if (osm) {
-	            osm.replaceNote(_note);  // update note cache
-	        }
+	    return false;
 
-	        context.replace(actionNoop());   // trigger redraw
-	    }
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
+	      if (osm) {
+	        var missing = coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	    function end() {
-	        context.replace(actionNoop());   // trigger redraw
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
+	        }
+	      }
 
-	        context
-	            .selectedNoteID(_note.id)
-	            .enter(modeSelectNote(context, _note.id));
+	      return false;
 	    }
 
+	    function hasWikidataTag(id) {
+	      var entity = context.entity(id);
+	      return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
+	    }
 
-	    var drag = behaviorDrag()
-	        .selector('.layer-touch.markers .target.note.new')
-	        .surface(context.container().select('.main-map').node())
-	        .origin(origin)
-	        .on('start', start)
-	        .on('move', move)
-	        .on('end', end);
-
+	    function incompleteRelation(id) {
+	      var entity = context.entity(id);
+	      return entity.type === 'relation' && !entity.isComplete(context.graph());
+	    }
 
-	    mode.enter = function() {
-	        context.install(edit);
-	    };
+	    function protectedMember(id) {
+	      var entity = context.entity(id);
+	      if (entity.type !== 'way') return false;
+	      var parents = context.graph().parentRelations(entity);
 
+	      for (var i = 0; i < parents.length; i++) {
+	        var parent = parents[i];
+	        var type = parent.tags.type;
+	        var role = parent.memberById(id).role || 'outer';
 
-	    mode.exit = function() {
-	        context.ui().sidebar.hover.cancel();
-	        context.uninstall(edit);
+	        if (type === 'route' || type === 'boundary' || type === 'multipolygon' && role === 'outer') {
+	          return true;
+	        }
+	      }
 
-	        context.surface()
-	            .selectAll('.active')
-	            .classed('active', false);
+	      return false;
+	    }
+	  };
 
-	        stopNudge();
-	    };
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.delete.' + disable + '.' + multi) : _t('operations.delete.description.' + multi);
+	  };
 
-	    mode.behavior = drag;
+	  operation.annotation = function () {
+	    return selectedIDs.length === 1 ? _t('operations.delete.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.delete.annotation.feature', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	    return mode;
+	  operation.id = 'delete';
+	  operation.keys = [uiCmd('⌘⌫'), uiCmd('⌘⌦'), uiCmd('⌦')];
+	  operation.title = _t('operations.delete.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
 	}
 
-	function uiDataHeader() {
-	    var _datum;
-
+	function operationOrthogonalize(context, selectedIDs) {
+	  var _extent;
 
-	    function dataHeader(selection) {
-	        var header = selection.selectAll('.data-header')
-	            .data(
-	                (_datum ? [_datum] : []),
-	                function(d) { return d.__featurehash__; }
-	            );
+	  var _type;
 
-	        header.exit()
-	            .remove();
+	  var _actions = selectedIDs.map(chooseAction).filter(Boolean);
 
-	        var headerEnter = header.enter()
-	            .append('div')
-	            .attr('class', 'data-header');
+	  var _amount = _actions.length === 1 ? 'single' : 'multiple';
 
-	        var iconEnter = headerEnter
-	            .append('div')
-	            .attr('class', 'data-header-icon');
+	  var _coords = utilGetAllNodes(selectedIDs, context.graph()).map(function (n) {
+	    return n.loc;
+	  });
 
-	        iconEnter
-	            .append('div')
-	            .attr('class', 'preset-icon-28')
-	            .call(svgIcon('#iD-icon-data', 'note-fill'));
+	  function chooseAction(entityID) {
+	    var entity = context.entity(entityID);
+	    var geometry = entity.geometry(context.graph());
 
-	        headerEnter
-	            .append('div')
-	            .attr('class', 'data-header-label')
-	            .text(_t('map_data.layers.custom.title'));
-	    }
+	    if (!_extent) {
+	      _extent = entity.extent(context.graph());
+	    } else {
+	      _extent = _extent.extend(entity.extent(context.graph()));
+	    } // square a line/area
 
 
-	    dataHeader.datum = function(val) {
-	        if (!arguments.length) { return _datum; }
-	        _datum = val;
-	        return this;
-	    };
+	    if (entity.type === 'way' && new Set(entity.nodes).size > 2) {
+	      if (_type && _type !== 'feature') return null;
+	      _type = 'feature';
+	      return actionOrthogonalize(entityID, context.projection); // square a single vertex
+	    } else if (geometry === 'vertex') {
+	      if (_type && _type !== 'corner') return null;
+	      _type = 'corner';
+	      var graph = context.graph();
+	      var parents = graph.parentWays(entity);
 
+	      if (parents.length === 1) {
+	        var way = parents[0];
 
-	    return dataHeader;
-	}
+	        if (way.nodes.indexOf(entityID) !== -1) {
+	          return actionOrthogonalize(way.id, context.projection, entityID);
+	        }
+	      }
+	    }
 
-	// This code assumes that the combobox values will not have duplicate entries.
-	// It is keyed on the `value` of the entry. Data should be an array of objects like:
-	//   [{
-	//       value:  'display text',  // required
-	//       title:  'hover text'     // optional
-	//   }, ...]
+	    return null;
+	  }
 
-	var _comboHideTimerID;
+	  var operation = function operation() {
+	    if (!_actions.length) return;
 
-	function uiCombobox(context, klass) {
-	    var dispatch$1 = dispatch('accept', 'cancel');
-	    var container = context.container();
+	    var combinedAction = function combinedAction(graph, t) {
+	      _actions.forEach(function (action) {
+	        if (!action.disabled(graph)) {
+	          graph = action(graph, t);
+	        }
+	      });
 
-	    var _suggestions = [];
-	    var _data = [];
-	    var _fetched = {};
-	    var _selected = null;
-	    var _canAutocomplete = true;
-	    var _caseSensitive = false;
-	    var _cancelFetch = false;
-	    var _minItems = 2;
-	    var _tDown = 0;
-	    var _mouseEnterHandler, _mouseLeaveHandler;
-
-	    var _fetcher = function(val, cb) {
-	        cb(_data.filter(function(d) {
-	            var terms = d.terms || [];
-	            terms.push(d.value);
-	            return terms.some(function(term) {
-	                return term
-	                    .toString()
-	                    .toLowerCase()
-	                    .indexOf(val.toLowerCase()) !== -1;
-	            });
-	        }));
+	      return graph;
 	    };
 
-	    var combobox = function(input, attachTo) {
-	        if (!input || input.empty()) { return; }
-
-	        input
-	            .classed('combobox-input', true)
-	            .on('focus.combo-input', focus)
-	            .on('blur.combo-input', blur)
-	            .on('keydown.combo-input', keydown)
-	            .on('keyup.combo-input', keyup)
-	            .on('input.combo-input', change)
-	            .on('mousedown.combo-input', mousedown)
-	            .each(function() {
-	                var parent = this.parentNode;
-	                var sibling = this.nextSibling;
-
-	                select(parent).selectAll('.combobox-caret')
-	                    .filter(function(d) { return d === input.node(); })
-	                    .data([input.node()])
-	                    .enter()
-	                    .insert('div', function() { return sibling; })
-	                    .attr('class', 'combobox-caret')
-	                    .on('mousedown.combo-caret', function() {
-	                        event.preventDefault(); // don't steal focus from input
-	                        input.node().focus(); // focus the input as if it was clicked
-	                        mousedown();
-	                    })
-	                    .on('mouseup.combo-caret', function() {
-	                        event.preventDefault(); // don't steal focus from input
-	                        mouseup();
-	                    });
-	            });
+	    combinedAction.transitionable = true;
+	    context.perform(combinedAction, operation.annotation());
+	    window.setTimeout(function () {
+	      context.validator().validate();
+	    }, 300); // after any transition
+	  };
 
+	  operation.available = function () {
+	    return _actions.length && selectedIDs.length === _actions.length;
+	  }; // don't cache this because the visible extent could change
 
-	        function mousedown() {
-	            if (event.button !== 0) { return; }    // left click only
-	            _tDown = +new Date();
 
-	            // clear selection
-	            var start = input.property('selectionStart');
-	            var end = input.property('selectionEnd');
-	            if (start !== end) {
-	                var val = utilGetSetValue(input);
-	                input.node().setSelectionRange(val.length, val.length);
-	                return;
-	            }
+	  operation.disabled = function () {
+	    if (!_actions.length) return '';
 
-	            input.on('mouseup.combo-input', mouseup);
-	        }
+	    var actionDisableds = _actions.map(function (action) {
+	      return action.disabled(context.graph());
+	    }).filter(Boolean);
 
+	    if (actionDisableds.length === _actions.length) {
+	      // none of the features can be squared
+	      if (new Set(actionDisableds).size > 1) {
+	        return 'multiple_blockers';
+	      }
 
-	        function mouseup() {
-	            input.on('mouseup.combo-input', null);
-	            if (event.button !== 0) { return; }    // left click only
-	            if (input.node() !== document.activeElement) { return; }   // exit if this input is not focused
+	      return actionDisableds[0];
+	    } else if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    } else if (someMissing()) {
+	      return 'not_downloaded';
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
+	    }
 
-	            var start = input.property('selectionStart');
-	            var end = input.property('selectionEnd');
-	            if (start !== end) { return; }  // exit if user is selecting
-
-	            // not showing or showing for a different field - try to show it.
-	            var combo = container.selectAll('.combobox');
-	            if (combo.empty() || combo.datum() !== input.node()) {
-	                var tOrig = _tDown;
-	                window.setTimeout(function() {
-	                    if (tOrig !== _tDown) { return; }   // exit if user double clicked
-	                    fetchComboData('', function() {
-	                        show();
-	                        render();
-	                    });
-	                }, 250);
+	    return false;
 
-	            } else {
-	                hide();
-	            }
-	        }
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
+	      if (osm) {
+	        var missing = _coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	        function focus() {
-	            fetchComboData('');   // prefetch values (may warm taginfo cache)
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
 	        }
+	      }
 
+	      return false;
+	    }
+	  };
 
-	        function blur() {
-	            _comboHideTimerID = window.setTimeout(hide, 75);
-	        }
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.orthogonalize.' + disable + '.' + _amount) : _t('operations.orthogonalize.description.' + _type + '.' + _amount);
+	  };
 
+	  operation.annotation = function () {
+	    return _t('operations.orthogonalize.annotation.' + _type, {
+	      n: _actions.length
+	    });
+	  };
 
-	        function show() {
-	            hide();   // remove any existing
+	  operation.id = 'orthogonalize';
+	  operation.keys = [_t('operations.orthogonalize.key')];
+	  operation.title = _t('operations.orthogonalize.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	            container
-	                .insert('div', ':first-child')
-	                .datum(input.node())
-	                .attr('class', 'combobox' + (klass ? ' combobox-' + klass : ''))
-	                .style('position', 'absolute')
-	                .style('display', 'block')
-	                .style('left', '0px')
-	                .on('mousedown.combo-container', function () {
-	                    // prevent moving focus out of the input field
-	                    event.preventDefault();
-	                });
+	function operationReflectShort(context, selectedIDs) {
+	  return operationReflect(context, selectedIDs, 'short');
+	}
+	function operationReflectLong(context, selectedIDs) {
+	  return operationReflect(context, selectedIDs, 'long');
+	}
+	function operationReflect(context, selectedIDs, axis) {
+	  axis = axis || 'long';
+	  var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+	  var nodes = utilGetAllNodes(selectedIDs, context.graph());
+	  var coords = nodes.map(function (n) {
+	    return n.loc;
+	  });
+	  var extent = utilTotalExtent(selectedIDs, context.graph());
 
-	            container
-	                .on('scroll.combo-scroll', render, true);
-	        }
+	  var operation = function operation() {
+	    var action = actionReflect(selectedIDs, context.projection).useLongAxis(Boolean(axis === 'long'));
+	    context.perform(action, operation.annotation());
+	    window.setTimeout(function () {
+	      context.validator().validate();
+	    }, 300); // after any transition
+	  };
 
+	  operation.available = function () {
+	    return nodes.length >= 3;
+	  }; // don't cache this because the visible extent could change
 
-	        function hide() {
-	            if (_comboHideTimerID) {
-	                window.clearTimeout(_comboHideTimerID);
-	                _comboHideTimerID = undefined;
-	            }
 
-	            container.selectAll('.combobox')
-	                .remove();
+	  operation.disabled = function () {
+	    if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    } else if (someMissing()) {
+	      return 'not_downloaded';
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
+	    } else if (selectedIDs.some(incompleteRelation)) {
+	      return 'incomplete_relation';
+	    }
 
-	            container
-	                .on('scroll.combo-scroll', null);
-	        }
+	    return false;
 
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	        function keydown() {
-	            var shown = !container.selectAll('.combobox').empty();
-	            var tagName = input.node() ? input.node().tagName.toLowerCase() : '';
+	      if (osm) {
+	        var missing = coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	            switch (event.keyCode) {
-	                case 8:   // ⌫ Backspace
-	                case 46:  // ⌦ Delete
-	                    event.stopPropagation();
-	                    _selected = null;
-	                    render();
-	                    input.on('input.combo-input', function() {
-	                        var start = input.property('selectionStart');
-	                        input.node().setSelectionRange(start, start);
-	                        input.on('input.combo-input', change);
-	                    });
-	                    break;
-
-	                case 9:   // ⇥ Tab
-	                    accept();
-	                    break;
-
-	                case 13:  // ↩ Return
-	                    event.preventDefault();
-	                    event.stopPropagation();
-	                    break;
-
-	                case 38:  // ↑ Up arrow
-	                    if (tagName === 'textarea' && !shown) { return; }
-	                    event.preventDefault();
-	                    if (tagName === 'input' && !shown) {
-	                        show();
-	                    }
-	                    nav(-1);
-	                    break;
-
-	                case 40:  // ↓ Down arrow
-	                    if (tagName === 'textarea' && !shown) { return; }
-	                    event.preventDefault();
-	                    if (tagName === 'input' && !shown) {
-	                        show();
-	                    }
-	                    nav(+1);
-	                    break;
-	            }
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
 	        }
+	      }
 
+	      return false;
+	    }
 
-	        function keyup() {
-	            switch (event.keyCode) {
-	                case 27:  // ⎋ Escape
-	                    cancel();
-	                    break;
+	    function incompleteRelation(id) {
+	      var entity = context.entity(id);
+	      return entity.type === 'relation' && !entity.isComplete(context.graph());
+	    }
+	  };
 
-	                case 13:  // ↩ Return
-	                    accept();
-	                    break;
-	            }
-	        }
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.reflect.' + disable + '.' + multi) : _t('operations.reflect.description.' + axis + '.' + multi);
+	  };
 
+	  operation.annotation = function () {
+	    return _t('operations.reflect.annotation.' + axis + '.feature', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	        // Called whenever the input value is changed (e.g. on typing)
-	        function change() {
-	            fetchComboData(value(), function() {
-	                _selected = null;
-	                var val = input.property('value');
+	  operation.id = 'reflect-' + axis;
+	  operation.keys = [_t('operations.reflect.key.' + axis)];
+	  operation.title = _t('operations.reflect.title.' + axis);
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	                if (_suggestions.length) {
-	                    if (input.property('selectionEnd') === val.length) {
-	                        _selected = tryAutocomplete();
-	                    }
+	function operationMove(context, selectedIDs) {
+	  var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+	  var nodes = utilGetAllNodes(selectedIDs, context.graph());
+	  var coords = nodes.map(function (n) {
+	    return n.loc;
+	  });
+	  var extent = utilTotalExtent(selectedIDs, context.graph());
 
-	                    if (!_selected) {
-	                        _selected = val;
-	                    }
-	                }
+	  var operation = function operation() {
+	    context.enter(modeMove(context, selectedIDs));
+	  };
 
-	                if (val.length) {
-	                    var combo = container.selectAll('.combobox');
-	                    if (combo.empty()) {
-	                        show();
-	                    }
-	                } else {
-	                    hide();
-	                }
+	  operation.available = function () {
+	    return selectedIDs.length > 0;
+	  };
 
-	                render();
-	            });
-	        }
+	  operation.disabled = function () {
+	    if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    } else if (someMissing()) {
+	      return 'not_downloaded';
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
+	    } else if (selectedIDs.some(incompleteRelation)) {
+	      return 'incomplete_relation';
+	    }
 
+	    return false;
 
-	        // Called when the user presses up/down arrows to navigate the list
-	        function nav(dir) {
-	            if (_suggestions.length) {
-	                // try to determine previously selected index..
-	                var index = -1;
-	                for (var i = 0; i < _suggestions.length; i++) {
-	                    if (_selected && _suggestions[i].value === _selected) {
-	                        index = i;
-	                        break;
-	                    }
-	                }
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	                // pick new _selected
-	                index = Math.max(Math.min(index + dir, _suggestions.length - 1), 0);
-	                _selected = _suggestions[index].value;
-	                input.property('value', _selected);
-	            }
+	      if (osm) {
+	        var missing = coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	            render();
-	            ensureVisible();
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
 	        }
+	      }
 
+	      return false;
+	    }
 
-	        function ensureVisible() {
-	            var combo = container.selectAll('.combobox');
-	            if (combo.empty()) { return; }
-
-	            var containerRect = container.node().getBoundingClientRect();
-	            var comboRect = combo.node().getBoundingClientRect();
+	    function incompleteRelation(id) {
+	      var entity = context.entity(id);
+	      return entity.type === 'relation' && !entity.isComplete(context.graph());
+	    }
+	  };
 
-	            if (comboRect.bottom > containerRect.bottom) {
-	                var node = attachTo ? attachTo.node() : input.node();
-	                node.scrollIntoView({ behavior: 'instant', block: 'center' });
-	                render();
-	            }
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.move.' + disable + '.' + multi) : _t('operations.move.description.' + multi);
+	  };
 
-	            // https://stackoverflow.com/questions/11039885/scrollintoview-causing-the-whole-page-to-move
-	            var selected = combo.selectAll('.combobox-option.selected').node();
-	            if (selected) {
-	                selected.scrollIntoView({ behavior: 'smooth', block: 'nearest' });
-	            }
-	        }
+	  operation.annotation = function () {
+	    return selectedIDs.length === 1 ? _t('operations.move.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.move.annotation.feature', {
+	      n: selectedIDs.length
+	    });
+	  };
 
+	  operation.id = 'move';
+	  operation.keys = [_t('operations.move.key')];
+	  operation.title = _t('operations.move.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  operation.mouseOnly = true;
+	  return operation;
+	}
 
-	        function value() {
-	            var value = input.property('value');
-	            var start = input.property('selectionStart');
-	            var end = input.property('selectionEnd');
+	function modeRotate(context, entityIDs) {
+	  var _tolerancePx = 4; // see also behaviorDrag, behaviorSelect, modeMove
 
-	            if (start && end) {
-	                value = value.substring(0, start);
-	            }
+	  var mode = {
+	    id: 'rotate',
+	    button: 'browse'
+	  };
+	  var keybinding = utilKeybinding('rotate');
+	  var behaviors = [behaviorEdit(context), operationCircularize(context, entityIDs).behavior, operationDelete(context, entityIDs).behavior, operationMove(context, entityIDs).behavior, operationOrthogonalize(context, entityIDs).behavior, operationReflectLong(context, entityIDs).behavior, operationReflectShort(context, entityIDs).behavior];
+	  var annotation = entityIDs.length === 1 ? _t('operations.rotate.annotation.' + context.graph().geometry(entityIDs[0])) : _t('operations.rotate.annotation.feature', {
+	    n: entityIDs.length
+	  });
 
-	            return value;
-	        }
+	  var _prevGraph;
 
+	  var _prevAngle;
 
-	        function fetchComboData(v, cb) {
-	            _cancelFetch = false;
+	  var _prevTransform;
 
-	            _fetcher.call(input, v, function(results) {
-	                // already chose a value, don't overwrite or autocomplete it
-	                if (_cancelFetch) { return; }
+	  var _pivot; // use pointer events on supported platforms; fallback to mouse events
 
-	                _suggestions = results;
-	                results.forEach(function(d) { _fetched[d.value] = d; });
 
-	                if (cb) {
-	                    cb();
-	                }
-	            });
-	        }
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
+	  function doRotate(d3_event) {
+	    var fn;
 
-	        function tryAutocomplete() {
-	            if (!_canAutocomplete) { return; }
+	    if (context.graph() !== _prevGraph) {
+	      fn = context.perform;
+	    } else {
+	      fn = context.replace;
+	    } // projection changed, recalculate _pivot
 
-	            var val = _caseSensitive ? value() : value().toLowerCase();
-	            if (!val) { return; }
 
-	            // Don't autocomplete if user is typing a number - #4935
-	            if (!isNaN(parseFloat(val)) && isFinite(val)) { return; }
+	    var projection = context.projection;
+	    var currTransform = projection.transform();
 
-	            var bestIndex = -1;
-	            for (var i = 0; i < _suggestions.length; i++) {
-	                var suggestion = _suggestions[i].value;
-	                var compare = _caseSensitive ? suggestion : suggestion.toLowerCase();
+	    if (!_prevTransform || currTransform.k !== _prevTransform.k || currTransform.x !== _prevTransform.x || currTransform.y !== _prevTransform.y) {
+	      var nodes = utilGetAllNodes(entityIDs, context.graph());
+	      var points = nodes.map(function (n) {
+	        return projection(n.loc);
+	      });
+	      _pivot = getPivot(points);
+	      _prevAngle = undefined;
+	    }
 
-	                // if search string matches suggestion exactly, pick it..
-	                if (compare === val) {
-	                    bestIndex = i;
-	                    break;
+	    var currMouse = context.map().mouse(d3_event);
+	    var currAngle = Math.atan2(currMouse[1] - _pivot[1], currMouse[0] - _pivot[0]);
+	    if (typeof _prevAngle === 'undefined') _prevAngle = currAngle;
+	    var delta = currAngle - _prevAngle;
+	    fn(actionRotate(entityIDs, _pivot, delta, projection));
+	    _prevTransform = currTransform;
+	    _prevAngle = currAngle;
+	    _prevGraph = context.graph();
+	  }
 
-	                // otherwise lock in the first result that starts with the search string..
-	                } else if (bestIndex === -1 && compare.indexOf(val) === 0) {
-	                    bestIndex = i;
-	                }
-	            }
+	  function getPivot(points) {
+	    var _pivot;
 
-	            if (bestIndex !== -1) {
-	                var bestVal = _suggestions[bestIndex].value;
-	                input.property('value', bestVal);
-	                input.node().setSelectionRange(val.length, bestVal.length);
-	                return bestVal;
-	            }
-	        }
+	    if (points.length === 1) {
+	      _pivot = points[0];
+	    } else if (points.length === 2) {
+	      _pivot = geoVecInterp(points[0], points[1], 0.5);
+	    } else {
+	      var polygonHull = d3_polygonHull(points);
 
+	      if (polygonHull.length === 2) {
+	        _pivot = geoVecInterp(points[0], points[1], 0.5);
+	      } else {
+	        _pivot = d3_polygonCentroid(d3_polygonHull(points));
+	      }
+	    }
 
-	        function render() {
-	            if (_suggestions.length < _minItems || document.activeElement !== input.node()) {
-	                hide();
-	                return;
-	            }
+	    return _pivot;
+	  }
 
-	            var shown = !container.selectAll('.combobox').empty();
-	            if (!shown) { return; }
-
-	            var combo = container.selectAll('.combobox');
-	            var options = combo.selectAll('.combobox-option')
-	                .data(_suggestions, function(d) { return d.value; });
-
-	            options.exit()
-	                .remove();
-
-	            // enter/update
-	            options.enter()
-	                .append('a')
-	                .attr('class', 'combobox-option')
-	                .attr('title', function(d) { return d.title; })
-	                .text(function(d) { return d.display || d.value; })
-	                .on('mouseenter', _mouseEnterHandler)
-	                .on('mouseleave', _mouseLeaveHandler)
-	                .merge(options)
-	                .classed('selected', function(d) { return d.value === _selected; })
-	                .on('click.combo-option', accept)
-	                .order();
-
-	            var node = attachTo ? attachTo.node() : input.node();
-	            var containerRect = container.node().getBoundingClientRect();
-	            var rect = node.getBoundingClientRect();
-
-	            combo
-	                .style('left', (rect.left + 5 - containerRect.left) + 'px')
-	                .style('width', (rect.width - 10) + 'px')
-	                .style('top', (rect.height + rect.top - containerRect.top) + 'px');
-	        }
-
-
-	        // Dispatches an 'accept' event
-	        // Then hides the combobox.
-	        function accept(d) {
-	            _cancelFetch = true;
-	            var thiz = input.node();
-
-	            if (d) {   // user clicked on a suggestion
-	                utilGetSetValue(input, d.value);    // replace field contents
-	                utilTriggerEvent(input, 'change');
-	            }
+	  function finish(d3_event) {
+	    d3_event.stopPropagation();
+	    context.replace(actionNoop(), annotation);
+	    context.enter(modeSelect(context, entityIDs));
+	  }
 
-	            // clear (and keep) selection
-	            var val = utilGetSetValue(input);
-	            thiz.setSelectionRange(val.length, val.length);
+	  function cancel() {
+	    if (_prevGraph) context.pop(); // remove the rotate
 
-	            d = _fetched[val];
-	            dispatch$1.call('accept', thiz, d, val);
-	            hide();
-	        }
+	    context.enter(modeSelect(context, entityIDs));
+	  }
 
+	  function undone() {
+	    context.enter(modeBrowse(context));
+	  }
 
-	        // Dispatches an 'cancel' event
-	        // Then hides the combobox.
-	        function cancel() {
-	            _cancelFetch = true;
-	            var thiz = input.node();
+	  mode.enter = function () {
+	    _prevGraph = null;
+	    context.features().forceVisible(entityIDs);
+	    behaviors.forEach(context.install);
+	    var downEvent;
+	    context.surface().on(_pointerPrefix + 'down.modeRotate', function (d3_event) {
+	      downEvent = d3_event;
+	    });
+	    select(window).on(_pointerPrefix + 'move.modeRotate', doRotate, true).on(_pointerPrefix + 'up.modeRotate', function (d3_event) {
+	      if (!downEvent) return;
+	      var mapNode = context.container().select('.main-map').node();
+	      var pointGetter = utilFastMouse(mapNode);
+	      var p1 = pointGetter(downEvent);
+	      var p2 = pointGetter(d3_event);
+	      var dist = geoVecLength(p1, p2);
+	      if (dist <= _tolerancePx) finish(d3_event);
+	      downEvent = null;
+	    }, true);
+	    context.history().on('undone.modeRotate', undone);
+	    keybinding.on('⎋', cancel).on('↩', finish);
+	    select(document).call(keybinding);
+	  };
 
-	            // clear (and remove) selection, and replace field contents
-	            var val = utilGetSetValue(input);
-	            var start = input.property('selectionStart');
-	            var end = input.property('selectionEnd');
-	            val = val.slice(0, start) + val.slice(end);
-	            utilGetSetValue(input, val);
-	            thiz.setSelectionRange(val.length, val.length);
+	  mode.exit = function () {
+	    behaviors.forEach(context.uninstall);
+	    context.surface().on(_pointerPrefix + 'down.modeRotate', null);
+	    select(window).on(_pointerPrefix + 'move.modeRotate', null, true).on(_pointerPrefix + 'up.modeRotate', null, true);
+	    context.history().on('undone.modeRotate', null);
+	    select(document).call(keybinding.unbind);
+	    context.features().forceVisible([]);
+	  };
 
-	            dispatch$1.call('cancel', thiz);
-	            hide();
-	        }
+	  mode.selectedIDs = function () {
+	    if (!arguments.length) return entityIDs; // no assign
 
-	    };
+	    return mode;
+	  };
 
+	  return mode;
+	}
 
-	    combobox.canAutocomplete = function(val) {
-	        if (!arguments.length) { return _canAutocomplete; }
-	        _canAutocomplete = val;
-	        return combobox;
-	    };
+	function operationRotate(context, selectedIDs) {
+	  var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+	  var nodes = utilGetAllNodes(selectedIDs, context.graph());
+	  var coords = nodes.map(function (n) {
+	    return n.loc;
+	  });
+	  var extent = utilTotalExtent(selectedIDs, context.graph());
 
-	    combobox.caseSensitive = function(val) {
-	        if (!arguments.length) { return _caseSensitive; }
-	        _caseSensitive = val;
-	        return combobox;
-	    };
+	  var operation = function operation() {
+	    context.enter(modeRotate(context, selectedIDs));
+	  };
 
-	    combobox.data = function(val) {
-	        if (!arguments.length) { return _data; }
-	        _data = val;
-	        return combobox;
-	    };
+	  operation.available = function () {
+	    return nodes.length >= 2;
+	  };
 
-	    combobox.fetcher = function(val) {
-	        if (!arguments.length) { return _fetcher; }
-	        _fetcher = val;
-	        return combobox;
-	    };
+	  operation.disabled = function () {
+	    if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    } else if (someMissing()) {
+	      return 'not_downloaded';
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
+	    } else if (selectedIDs.some(incompleteRelation)) {
+	      return 'incomplete_relation';
+	    }
 
-	    combobox.minItems = function(val) {
-	        if (!arguments.length) { return _minItems; }
-	        _minItems = val;
-	        return combobox;
-	    };
+	    return false;
 
-	    combobox.itemsMouseEnter = function(val) {
-	        if (!arguments.length) { return _mouseEnterHandler; }
-	        _mouseEnterHandler = val;
-	        return combobox;
-	    };
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	    combobox.itemsMouseLeave = function(val) {
-	        if (!arguments.length) { return _mouseLeaveHandler; }
-	        _mouseLeaveHandler = val;
-	        return combobox;
-	    };
+	      if (osm) {
+	        var missing = coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	    return utilRebind(combobox, dispatch$1, 'on');
-	}
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
+	        }
+	      }
 
+	      return false;
+	    }
 
-	uiCombobox.off = function(input, context) {
-	    input
-	        .on('focus.combo-input', null)
-	        .on('blur.combo-input', null)
-	        .on('keydown.combo-input', null)
-	        .on('keyup.combo-input', null)
-	        .on('input.combo-input', null)
-	        .on('mousedown.combo-input', null)
-	        .on('mouseup.combo-input', null);
+	    function incompleteRelation(id) {
+	      var entity = context.entity(id);
+	      return entity.type === 'relation' && !entity.isComplete(context.graph());
+	    }
+	  };
 
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.rotate.' + disable + '.' + multi) : _t('operations.rotate.description.' + multi);
+	  };
 
-	    context.container()
-	        .on('scroll.combo-scroll', null);
-	};
+	  operation.annotation = function () {
+	    return selectedIDs.length === 1 ? _t('operations.rotate.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.rotate.annotation.feature', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	// toggles the visibility of ui elements, using a combination of the
-	// hide class, which sets display=none, and a d3 transition for opacity.
-	// this will cause blinking when called repeatedly, so check that the
-	// value actually changes between calls.
-	function uiToggle(show, callback) {
-	    return function(selection) {
-	        selection
-	            .style('opacity', show ? 0 : 1)
-	            .classed('hide', false)
-	            .transition()
-	            .style('opacity', show ? 1 : 0)
-	            .on('end', function() {
-	                select(this)
-	                    .classed('hide', !show)
-	                    .style('opacity', null);
-	                if (callback) { callback.apply(this); }
-	            });
-	    };
+	  operation.id = 'rotate';
+	  operation.keys = [_t('operations.rotate.key')];
+	  operation.title = _t('operations.rotate.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  operation.mouseOnly = true;
+	  return operation;
 	}
 
-	function uiDisclosure(context, key, expandedDefault) {
-	    var dispatch$1 = dispatch('toggled');
-	    var _expanded;
-	    var _title = utilFunctor('');
-	    var _updatePreference = true;
-	    var _content = function () {};
-
+	function modeMove(context, entityIDs, baseGraph) {
+	  var _tolerancePx = 4; // see also behaviorDrag, behaviorSelect, modeRotate
 
-	    var disclosure = function(selection) {
+	  var mode = {
+	    id: 'move',
+	    button: 'browse'
+	  };
+	  var keybinding = utilKeybinding('move');
+	  var behaviors = [behaviorEdit(context), operationCircularize(context, entityIDs).behavior, operationDelete(context, entityIDs).behavior, operationOrthogonalize(context, entityIDs).behavior, operationReflectLong(context, entityIDs).behavior, operationReflectShort(context, entityIDs).behavior, operationRotate(context, entityIDs).behavior];
+	  var annotation = entityIDs.length === 1 ? _t('operations.move.annotation.' + context.graph().geometry(entityIDs[0])) : _t('operations.move.annotation.feature', {
+	    n: entityIDs.length
+	  });
 
-	        if (_expanded === undefined || _expanded === null) {
-	            // loading _expanded here allows it to be reset by calling `disclosure.expanded(null)`
+	  var _prevGraph;
 
-	            var preference = corePreferences('disclosure.' + key + '.expanded');
-	            _expanded = preference === null ? !!expandedDefault : (preference === 'true');
-	        }
+	  var _cache;
 
-	        var hideToggle = selection.selectAll('.hide-toggle-' + key)
-	            .data([0]);
+	  var _origin;
 
-	        // enter
-	        var hideToggleEnter = hideToggle.enter()
-	            .append('a')
-	            .attr('href', '#')
-	            .attr('class', 'hide-toggle hide-toggle-' + key)
-	            .call(svgIcon('', 'pre-text', 'hide-toggle-icon'));
+	  var _nudgeInterval; // use pointer events on supported platforms; fallback to mouse events
 
-	        hideToggleEnter
-	            .append('span')
-	            .attr('class', 'hide-toggle-text');
 
-	        // update
-	        hideToggle = hideToggleEnter
-	            .merge(hideToggle);
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	        hideToggle
-	            .on('click', toggle)
-	            .classed('expanded', _expanded);
+	  function doMove(nudge) {
+	    nudge = nudge || [0, 0];
+	    var fn;
 
-	        hideToggle.selectAll('.hide-toggle-text')
-	            .text(_title());
+	    if (_prevGraph !== context.graph()) {
+	      _cache = {};
+	      _origin = context.map().mouseCoordinates();
+	      fn = context.perform;
+	    } else {
+	      fn = context.overwrite;
+	    }
 
-	        hideToggle.selectAll('.hide-toggle-icon')
-	            .attr('xlink:href', _expanded ? '#iD-icon-down'
-	                : (_mainLocalizer.textDirection() === 'rtl') ? '#iD-icon-backward' : '#iD-icon-forward'
-	            );
+	    var currMouse = context.map().mouse();
+	    var origMouse = context.projection(_origin);
+	    var delta = geoVecSubtract(geoVecSubtract(currMouse, origMouse), nudge);
+	    fn(actionMove(entityIDs, delta, context.projection, _cache));
+	    _prevGraph = context.graph();
+	  }
 
+	  function startNudge(nudge) {
+	    if (_nudgeInterval) window.clearInterval(_nudgeInterval);
+	    _nudgeInterval = window.setInterval(function () {
+	      context.map().pan(nudge);
+	      doMove(nudge);
+	    }, 50);
+	  }
 
-	        var wrap = selection.selectAll('.disclosure-wrap')
-	            .data([0]);
+	  function stopNudge() {
+	    if (_nudgeInterval) {
+	      window.clearInterval(_nudgeInterval);
+	      _nudgeInterval = null;
+	    }
+	  }
 
-	        // enter/update
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'disclosure-wrap disclosure-wrap-' + key)
-	            .merge(wrap)
-	            .classed('hide', !_expanded);
+	  function move() {
+	    doMove();
+	    var nudge = geoViewportEdge(context.map().mouse(), context.map().dimensions());
 
-	        if (_expanded) {
-	            wrap
-	                .call(_content);
-	        }
+	    if (nudge) {
+	      startNudge(nudge);
+	    } else {
+	      stopNudge();
+	    }
+	  }
 
+	  function finish(d3_event) {
+	    d3_event.stopPropagation();
+	    context.replace(actionNoop(), annotation);
+	    context.enter(modeSelect(context, entityIDs));
+	    stopNudge();
+	  }
 
-	        function toggle() {
-	            event.preventDefault();
+	  function cancel() {
+	    if (baseGraph) {
+	      while (context.graph() !== baseGraph) {
+	        context.pop();
+	      } // reset to baseGraph
 
-	            _expanded = !_expanded;
 
-	            if (_updatePreference) {
-	                corePreferences('disclosure.' + key + '.expanded', _expanded);
-	            }
+	      context.enter(modeBrowse(context));
+	    } else {
+	      if (_prevGraph) context.pop(); // remove the move
 
-	            hideToggle
-	                .classed('expanded', _expanded);
+	      context.enter(modeSelect(context, entityIDs));
+	    }
 
-	            hideToggle.selectAll('.hide-toggle-icon')
-	                .attr('xlink:href', _expanded ? '#iD-icon-down'
-	                    : (_mainLocalizer.textDirection() === 'rtl') ? '#iD-icon-backward' : '#iD-icon-forward'
-	                );
+	    stopNudge();
+	  }
 
-	            wrap
-	                .call(uiToggle(_expanded));
+	  function undone() {
+	    context.enter(modeBrowse(context));
+	  }
 
-	            if (_expanded) {
-	                wrap
-	                    .call(_content);
-	            }
+	  mode.enter = function () {
+	    _origin = context.map().mouseCoordinates();
+	    _prevGraph = null;
+	    _cache = {};
+	    context.features().forceVisible(entityIDs);
+	    behaviors.forEach(context.install);
+	    var downEvent;
+	    context.surface().on(_pointerPrefix + 'down.modeMove', function (d3_event) {
+	      downEvent = d3_event;
+	    });
+	    select(window).on(_pointerPrefix + 'move.modeMove', move, true).on(_pointerPrefix + 'up.modeMove', function (d3_event) {
+	      if (!downEvent) return;
+	      var mapNode = context.container().select('.main-map').node();
+	      var pointGetter = utilFastMouse(mapNode);
+	      var p1 = pointGetter(downEvent);
+	      var p2 = pointGetter(d3_event);
+	      var dist = geoVecLength(p1, p2);
+	      if (dist <= _tolerancePx) finish(d3_event);
+	      downEvent = null;
+	    }, true);
+	    context.history().on('undone.modeMove', undone);
+	    keybinding.on('⎋', cancel).on('↩', finish);
+	    select(document).call(keybinding);
+	  };
 
-	            dispatch$1.call('toggled', this, _expanded);
-	        }
-	    };
+	  mode.exit = function () {
+	    stopNudge();
+	    behaviors.forEach(function (behavior) {
+	      context.uninstall(behavior);
+	    });
+	    context.surface().on(_pointerPrefix + 'down.modeMove', null);
+	    select(window).on(_pointerPrefix + 'move.modeMove', null, true).on(_pointerPrefix + 'up.modeMove', null, true);
+	    context.history().on('undone.modeMove', null);
+	    select(document).call(keybinding.unbind);
+	    context.features().forceVisible([]);
+	  };
 
+	  mode.selectedIDs = function () {
+	    if (!arguments.length) return entityIDs; // no assign
 
-	    disclosure.title = function(val) {
-	        if (!arguments.length) { return _title; }
-	        _title = utilFunctor(val);
-	        return disclosure;
-	    };
+	    return mode;
+	  };
 
+	  return mode;
+	}
 
-	    disclosure.expanded = function(val) {
-	        if (!arguments.length) { return _expanded; }
-	        _expanded = val;
-	        return disclosure;
-	    };
+	function behaviorPaste(context) {
+	  function doPaste(d3_event) {
+	    // prevent paste during low zoom selection
+	    if (!context.map().withinEditableZoom()) return;
+	    d3_event.preventDefault();
+	    var baseGraph = context.graph();
+	    var mouse = context.map().mouse();
+	    var projection = context.projection;
+	    var viewport = geoExtent(projection.clipExtent()).polygon();
+	    if (!geoPointInPolygon(mouse, viewport)) return;
+	    var oldIDs = context.copyIDs();
+	    if (!oldIDs.length) return;
+	    var extent = geoExtent();
+	    var oldGraph = context.copyGraph();
+	    var newIDs = [];
+	    var action = actionCopyEntities(oldIDs, oldGraph);
+	    context.perform(action);
+	    var copies = action.copies();
+	    var originals = new Set();
+	    Object.values(copies).forEach(function (entity) {
+	      originals.add(entity.id);
+	    });
 
+	    for (var id in copies) {
+	      var oldEntity = oldGraph.entity(id);
+	      var newEntity = copies[id];
 
-	    disclosure.updatePreference = function(val) {
-	        if (!arguments.length) { return _updatePreference; }
-	        _updatePreference = val;
-	        return disclosure;
-	    };
+	      extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.
 
 
-	    disclosure.content = function(val) {
-	        if (!arguments.length) { return _content; }
-	        _content = val;
-	        return disclosure;
-	    };
+	      var parents = context.graph().parentWays(newEntity);
+	      var parentCopied = parents.some(function (parent) {
+	        return originals.has(parent.id);
+	      });
 
+	      if (!parentCopied) {
+	        newIDs.push(newEntity.id);
+	      }
+	    } // Put pasted objects where mouse pointer is..
 
-	    return utilRebind(disclosure, dispatch$1, 'on');
-	}
 
-	// A unit of controls or info to be used in a layout, such as within a pane.
-	// Can be labeled and collapsible.
-	function uiSection(id, context) {
+	    var copyPoint = context.copyLonLat() && projection(context.copyLonLat()) || projection(extent.center());
+	    var delta = geoVecSubtract(mouse, copyPoint);
+	    context.perform(actionMove(newIDs, delta, projection));
+	    context.enter(modeMove(context, newIDs, baseGraph));
+	  }
 
-	    var _classes = utilFunctor('');
-	    var _shouldDisplay;
-	    var _content;
+	  function behavior() {
+	    context.keybinding().on(uiCmd('⌘V'), doPaste);
+	    return behavior;
+	  }
 
-	    var _disclosure;
-	    var _title;
-	    var _expandedByDefault = utilFunctor(true);
-	    var _disclosureContent;
-	    var _disclosureExpanded;
+	  behavior.off = function () {
+	    context.keybinding().off(uiCmd('⌘V'));
+	  };
 
-	    var _containerSelection = select(null);
+	  return behavior;
+	}
 
-	    var section = {
-	        id: id
-	    };
+	var $$5 = _export;
+	var repeat = stringRepeat;
 
-	    section.classes = function(val) {
-	        if (!arguments.length) { return _classes; }
-	        _classes = utilFunctor(val);
-	        return section;
-	    };
+	// `String.prototype.repeat` method
+	// https://tc39.es/ecma262/#sec-string.prototype.repeat
+	$$5({ target: 'String', proto: true }, {
+	  repeat: repeat
+	});
 
-	    section.title = function(val) {
-	        if (!arguments.length) { return _title; }
-	        _title = utilFunctor(val);
-	        return section;
-	    };
+	/*
+	    `behaviorDrag` is like `d3_behavior.drag`, with the following differences:
 
-	    section.expandedByDefault = function(val) {
-	        if (!arguments.length) { return _expandedByDefault; }
-	        _expandedByDefault = utilFunctor(val);
-	        return section;
-	    };
+	    * The `origin` function is expected to return an [x, y] tuple rather than an
+	      {x, y} object.
+	    * The events are `start`, `move`, and `end`.
+	      (https://github.com/mbostock/d3/issues/563)
+	    * The `start` event is not dispatched until the first cursor movement occurs.
+	      (https://github.com/mbostock/d3/pull/368)
+	    * The `move` event has a `point` and `delta` [x, y] tuple properties rather
+	      than `x`, `y`, `dx`, and `dy` properties.
+	    * The `end` event is not dispatched if no movement occurs.
+	    * An `off` function is available that unbinds the drag's internal event handlers.
+	 */
 
-	    section.shouldDisplay = function(val) {
-	        if (!arguments.length) { return _shouldDisplay; }
-	        _shouldDisplay = utilFunctor(val);
-	        return section;
-	    };
+	function behaviorDrag() {
+	  var dispatch = dispatch$8('start', 'move', 'end'); // see also behaviorSelect
 
-	    section.content = function(val) {
-	        if (!arguments.length) { return _content; }
-	        _content = val;
-	        return section;
-	    };
+	  var _tolerancePx = 1; // keep this low to facilitate pixel-perfect micromapping
 
-	    section.disclosureContent = function(val) {
-	        if (!arguments.length) { return _disclosureContent; }
-	        _disclosureContent = val;
-	        return section;
-	    };
+	  var _penTolerancePx = 4; // styluses can be touchy so require greater movement - #1981
 
-	    section.disclosureExpanded = function(val) {
-	        if (!arguments.length) { return _disclosureExpanded; }
-	        _disclosureExpanded = val;
-	        return section;
-	    };
+	  var _origin = null;
+	  var _selector = '';
 
-	    // may be called multiple times
-	    section.render = function(selection) {
+	  var _targetNode;
 
-	        _containerSelection = selection
-	            .selectAll('.section-' + id)
-	            .data([0]);
+	  var _targetEntity;
 
-	        var sectionEnter = _containerSelection
-	            .enter()
-	            .append('div')
-	            .attr('class', 'section section-' + id + ' ' + (_classes && _classes() || ''));
+	  var _surface;
 
-	        _containerSelection = sectionEnter
-	            .merge(_containerSelection);
+	  var _pointerId; // use pointer events on supported platforms; fallback to mouse events
 
-	        _containerSelection
-	            .call(renderContent);
-	    };
 
-	    section.reRender = function() {
-	        _containerSelection
-	            .call(renderContent);
-	    };
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	    section.selection = function() {
-	        return _containerSelection;
-	    };
+	  var d3_event_userSelectProperty = utilPrefixCSSProperty('UserSelect');
 
-	    section.disclosure = function() {
-	        return _disclosure;
+	  var d3_event_userSelectSuppress = function d3_event_userSelectSuppress() {
+	    var selection$1 = selection();
+	    var select = selection$1.style(d3_event_userSelectProperty);
+	    selection$1.style(d3_event_userSelectProperty, 'none');
+	    return function () {
+	      selection$1.style(d3_event_userSelectProperty, select);
 	    };
+	  };
 
-	    // may be called multiple times
-	    function renderContent(selection) {
-	        if (_shouldDisplay) {
-	            var shouldDisplay = _shouldDisplay();
-	            selection.classed('hide', !shouldDisplay);
-	            if (!shouldDisplay) {
-	                selection.html('');
-	                return;
-	            }
-	        }
-
-	        if (_disclosureContent) {
-	            if (!_disclosure) {
-	                _disclosure = uiDisclosure(context, id.replace(/-/g, '_'), _expandedByDefault())
-	                    .title(_title || '')
-	                    /*.on('toggled', function(expanded) {
-	                        if (expanded) { selection.node().parentNode.scrollTop += 200; }
-	                    })*/
-	                    .content(_disclosureContent);
-	            }
-	            if (_disclosureExpanded !== undefined) {
-	                _disclosure.expanded(_disclosureExpanded);
-	                _disclosureExpanded = undefined;
-	            }
-	            selection
-	                .call(_disclosure);
+	  function pointerdown(d3_event) {
+	    if (_pointerId) return;
+	    _pointerId = d3_event.pointerId || 'mouse';
+	    _targetNode = this; // only force reflow once per drag
 
-	            return;
-	        }
+	    var pointerLocGetter = utilFastMouse(_surface || _targetNode.parentNode);
+	    var offset;
+	    var startOrigin = pointerLocGetter(d3_event);
+	    var started = false;
+	    var selectEnable = d3_event_userSelectSuppress();
+	    select(window).on(_pointerPrefix + 'move.drag', pointermove).on(_pointerPrefix + 'up.drag pointercancel.drag', pointerup, true);
 
-	        if (_content) {
-	            selection
-	                .call(_content);
-	        }
+	    if (_origin) {
+	      offset = _origin.call(_targetNode, _targetEntity);
+	      offset = [offset[0] - startOrigin[0], offset[1] - startOrigin[1]];
+	    } else {
+	      offset = [0, 0];
 	    }
 
-	    return section;
-	}
+	    d3_event.stopPropagation();
 
-	// Pass `what` object of the form:
-	// {
-	//   key: 'string',     // required
-	//   value: 'string'    // optional
-	// }
-	//   -or-
-	// {
-	//   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
-	// }
-	//
-	function uiTagReference(what) {
-	    var wikibase = what.qid ? services.wikidata : services.osmWikibase;
-	    var tagReference = {};
+	    function pointermove(d3_event) {
+	      if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
+	      var p = pointerLocGetter(d3_event);
 
-	    var _button = select(null);
-	    var _body = select(null);
-	    var _loaded;
-	    var _showing;
+	      if (!started) {
+	        var dist = geoVecLength(startOrigin, p);
+	        var tolerance = d3_event.pointerType === 'pen' ? _penTolerancePx : _tolerancePx; // don't start until the drag has actually moved somewhat
 
+	        if (dist < tolerance) return;
+	        started = true;
+	        dispatch.call('start', this, d3_event, _targetEntity); // Don't send a `move` event in the same cycle as `start` since dragging
+	        // a midpoint will convert the target to a node.
+	      } else {
+	        startOrigin = p;
+	        d3_event.stopPropagation();
+	        d3_event.preventDefault();
+	        var dx = p[0] - startOrigin[0];
+	        var dy = p[1] - startOrigin[1];
+	        dispatch.call('move', this, d3_event, _targetEntity, [p[0] + offset[0], p[1] + offset[1]], [dx, dy]);
+	      }
+	    }
 
-	    function load() {
-	        if (!wikibase) { return; }
+	    function pointerup(d3_event) {
+	      if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
+	      _pointerId = null;
 
-	        _button
-	            .classed('tag-reference-loading', true);
+	      if (started) {
+	        dispatch.call('end', this, d3_event, _targetEntity);
+	        d3_event.preventDefault();
+	      }
 
-	        wikibase.getDocs(what, gotDocs);
+	      select(window).on(_pointerPrefix + 'move.drag', null).on(_pointerPrefix + 'up.drag pointercancel.drag', null);
+	      selectEnable();
 	    }
+	  }
 
+	  function behavior(selection) {
+	    var matchesSelector = utilPrefixDOMProperty('matchesSelector');
+	    var delegate = pointerdown;
 
-	    function gotDocs(err, docs) {
-	        _body.html('');
+	    if (_selector) {
+	      delegate = function delegate(d3_event) {
+	        var root = this;
+	        var target = d3_event.target;
 
-	        if (!docs || !docs.title) {
-	            _body
-	                .append('p')
-	                .attr('class', 'tag-reference-description')
-	                .text(_t('inspector.no_documentation_key'));
-	            done();
-	            return;
-	        }
+	        for (; target && target !== root; target = target.parentNode) {
+	          var datum = target.__data__;
+	          _targetEntity = datum instanceof osmNote ? datum : datum && datum.properties && datum.properties.entity;
 
-	        if (docs.imageURL) {
-	            _body
-	                .append('img')
-	                .attr('class', 'tag-reference-wiki-image')
-	                .attr('src', docs.imageURL)
-	                .on('load', function() { done(); })
-	                .on('error', function() { select(this).remove(); done(); });
-	        } else {
-	            done();
-	        }
-
-	        _body
-	            .append('p')
-	            .attr('class', 'tag-reference-description')
-	            .text(docs.description || _t('inspector.no_documentation_key'))
-	            .append('a')
-	            .attr('class', 'tag-reference-edit')
-	            .attr('target', '_blank')
-	            .attr('tabindex', -1)
-	            .attr('title', _t('inspector.edit_reference'))
-	            .attr('href', docs.editURL)
-	            .call(svgIcon('#iD-icon-edit', 'inline'));
-
-	        if (docs.wiki) {
-	            _body
-	              .append('a')
-	              .attr('class', 'tag-reference-link')
-	              .attr('target', '_blank')
-	              .attr('tabindex', -1)
-	              .attr('href', docs.wiki.url)
-	              .call(svgIcon('#iD-icon-out-link', 'inline'))
-	              .append('span')
-	              .text(_t(docs.wiki.text));
-	        }
-
-	        // Add link to info about "good changeset comments" - #2923
-	        if (what.key === 'comment') {
-	            _body
-	                .append('a')
-	                .attr('class', 'tag-reference-comment-link')
-	                .attr('target', '_blank')
-	                .attr('tabindex', -1)
-	                .call(svgIcon('#iD-icon-out-link', 'inline'))
-	                .attr('href', _t('commit.about_changeset_comments_link'))
-	                .append('span')
-	                .text(_t('commit.about_changeset_comments'));
+	          if (_targetEntity && target[matchesSelector](_selector)) {
+	            return pointerdown.call(target, d3_event);
+	          }
 	        }
+	      };
 	    }
 
+	    selection.on(_pointerPrefix + 'down.drag' + _selector, delegate);
+	  }
 
-	    function done() {
-	        _loaded = true;
-
-	        _button
-	            .classed('tag-reference-loading', false);
+	  behavior.off = function (selection) {
+	    selection.on(_pointerPrefix + 'down.drag' + _selector, null);
+	  };
 
-	        _body
-	            .classed('expanded', true)
-	            .transition()
-	            .duration(200)
-	            .style('max-height', '200px')
-	            .style('opacity', '1');
+	  behavior.selector = function (_) {
+	    if (!arguments.length) return _selector;
+	    _selector = _;
+	    return behavior;
+	  };
 
-	        _showing = true;
+	  behavior.origin = function (_) {
+	    if (!arguments.length) return _origin;
+	    _origin = _;
+	    return behavior;
+	  };
 
-	        _button.selectAll('svg.icon use').each(function() {
-	            var iconUse = select(this);
-	            if (iconUse.attr('href') === '#iD-icon-info') {
-	                iconUse.attr('href', '#iD-icon-info-filled');
-	            }
-	        });
-	    }
+	  behavior.cancel = function () {
+	    select(window).on(_pointerPrefix + 'move.drag', null).on(_pointerPrefix + 'up.drag pointercancel.drag', null);
+	    return behavior;
+	  };
 
+	  behavior.targetNode = function (_) {
+	    if (!arguments.length) return _targetNode;
+	    _targetNode = _;
+	    return behavior;
+	  };
 
-	    function hide() {
-	        _body
-	            .transition()
-	            .duration(200)
-	            .style('max-height', '0px')
-	            .style('opacity', '0')
-	            .on('end', function () {
-	                _body.classed('expanded', false);
-	            });
+	  behavior.targetEntity = function (_) {
+	    if (!arguments.length) return _targetEntity;
+	    _targetEntity = _;
+	    return behavior;
+	  };
 
-	        _showing = false;
+	  behavior.surface = function (_) {
+	    if (!arguments.length) return _surface;
+	    _surface = _;
+	    return behavior;
+	  };
 
-	        _button.selectAll('svg.icon use').each(function() {
-	            var iconUse = select(this);
-	            if (iconUse.attr('href') === '#iD-icon-info-filled') {
-	                iconUse.attr('href', '#iD-icon-info');
-	            }
-	        });
+	  return utilRebind(behavior, dispatch, 'on');
+	}
 
-	    }
+	function modeDragNode(context) {
+	  var mode = {
+	    id: 'drag-node',
+	    button: 'browse'
+	  };
+	  var hover = behaviorHover(context).altDisables(true).on('hover', context.ui().sidebar.hover);
+	  var edit = behaviorEdit(context);
 
+	  var _nudgeInterval;
 
-	    tagReference.button = function(selection, klass, iconName) {
-	        _button = selection.selectAll('.tag-reference-button')
-	            .data([0]);
+	  var _restoreSelectedIDs = [];
+	  var _wasMidpoint = false;
+	  var _isCancelled = false;
 
-	        _button = _button.enter()
-	            .append('button')
-	            .attr('class', 'tag-reference-button ' + klass)
-	            .attr('title', _t('icons.information'))
-	            .attr('tabindex', -1)
-	            .call(svgIcon('#iD-icon-' + (iconName || 'inspect')))
-	            .merge(_button);
+	  var _activeEntity;
 
-	        _button
-	            .on('click', function () {
-	                event.stopPropagation();
-	                event.preventDefault();
-	                this.blur();    // avoid keeping focus on the button - #4641
-	                if (_showing) {
-	                    hide();
-	                } else if (_loaded) {
-	                    done();
-	                } else {
-	                    load();
-	                }
-	            });
-	    };
+	  var _startLoc;
 
+	  var _lastLoc;
 
-	    tagReference.body = function(selection) {
-	        var itemID = what.qid || (what.key + '-' + (what.value || ''));
-	        _body = selection.selectAll('.tag-reference-body')
-	            .data([itemID], function(d) { return d; });
+	  function startNudge(d3_event, entity, nudge) {
+	    if (_nudgeInterval) window.clearInterval(_nudgeInterval);
+	    _nudgeInterval = window.setInterval(function () {
+	      context.map().pan(nudge);
+	      doMove(d3_event, entity, nudge);
+	    }, 50);
+	  }
 
-	        _body.exit()
-	            .remove();
+	  function stopNudge() {
+	    if (_nudgeInterval) {
+	      window.clearInterval(_nudgeInterval);
+	      _nudgeInterval = null;
+	    }
+	  }
 
-	        _body = _body.enter()
-	            .append('div')
-	            .attr('class', 'tag-reference-body')
-	            .style('max-height', '0')
-	            .style('opacity', '0')
-	            .merge(_body);
+	  function moveAnnotation(entity) {
+	    return _t('operations.move.annotation.' + entity.geometry(context.graph()));
+	  }
 
-	        if (_showing === false) {
-	            hide();
-	        }
-	    };
+	  function connectAnnotation(nodeEntity, targetEntity) {
+	    var nodeGeometry = nodeEntity.geometry(context.graph());
+	    var targetGeometry = targetEntity.geometry(context.graph());
 
+	    if (nodeGeometry === 'vertex' && targetGeometry === 'vertex') {
+	      var nodeParentWayIDs = context.graph().parentWays(nodeEntity);
+	      var targetParentWayIDs = context.graph().parentWays(targetEntity);
+	      var sharedParentWays = utilArrayIntersection(nodeParentWayIDs, targetParentWayIDs); // if both vertices are part of the same way
 
-	    tagReference.showing = function(val) {
-	        if (!arguments.length) { return _showing; }
-	        _showing = val;
-	        return tagReference;
-	    };
+	      if (sharedParentWays.length !== 0) {
+	        // if the nodes are next to each other, they are merged
+	        if (sharedParentWays[0].areAdjacent(nodeEntity.id, targetEntity.id)) {
+	          return _t('operations.connect.annotation.from_vertex.to_adjacent_vertex');
+	        }
 
+	        return _t('operations.connect.annotation.from_vertex.to_sibling_vertex');
+	      }
+	    }
 
-	    return tagReference;
-	}
+	    return _t('operations.connect.annotation.from_' + nodeGeometry + '.to_' + targetGeometry);
+	  }
 
-	function uiSectionRawTagEditor(id, context) {
+	  function shouldSnapToNode(target) {
+	    if (!_activeEntity) return false;
+	    return _activeEntity.geometry(context.graph()) !== 'vertex' || target.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(target, context.graph());
+	  }
 
-	    var section = uiSection(id, context)
-	        .classes('raw-tag-editor')
-	        .title(function() {
-	            var count = Object.keys(_tags).filter(function(d) { return d; }).length;
-	            return _t('inspector.title_count', { title: _t('inspector.tags'), count: count });
-	        })
-	        .expandedByDefault(false)
-	        .disclosureContent(renderDisclosureContent);
-
-	    var taginfo = services.taginfo;
-	    var dispatch$1 = dispatch('change');
-	    var availableViews = [
-	        { id: 'text', icon: '#fas-i-cursor' },
-	        { id: 'list', icon: '#fas-th-list' }
-	    ];
+	  function origin(entity) {
+	    return context.projection(entity.loc);
+	  }
 
-	    var _tagView = (corePreferences('raw-tag-editor-view') || 'list');   // 'list, 'text'
-	    var _readOnlyTags = [];
-	    // the keys in the order we want them to display
-	    var _orderedKeys = [];
-	    var _showBlank = false;
-	    var _pendingChange = null;
-	    var _state;
-	    var _presets;
-	    var _tags;
-	    var _entityIDs;
-
-	    function renderDisclosureContent(wrap) {
-
-	        // remove deleted keys
-	        _orderedKeys = _orderedKeys.filter(function(key) {
-	            return _tags[key] !== undefined;
-	        });
+	  function keydown(d3_event) {
+	    if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      if (context.surface().classed('nope')) {
+	        context.surface().classed('nope-suppressed', true);
+	      }
 
-	        // When switching to a different entity or changing the state (hover/select)
-	        // reorder the keys alphabetically.
-	        // We trigger this by emptying the `_orderedKeys` array, then it will be rebuilt here.
-	        // Otherwise leave their order alone - #5857, #5927
-	        var all = Object.keys(_tags).sort();
-	        var missingKeys = utilArrayDifference(all, _orderedKeys);
-	        for (var i in missingKeys) {
-	            _orderedKeys.push(missingKeys[i]);
-	        }
+	      context.surface().classed('nope', false).classed('nope-disabled', true);
+	    }
+	  }
 
-	        // assemble row data
-	        var rowData = _orderedKeys.map(function(key, i) {
-	            return { index: i, key: key, value: _tags[key] };
-	        });
+	  function keyup(d3_event) {
+	    if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      if (context.surface().classed('nope-suppressed')) {
+	        context.surface().classed('nope', true);
+	      }
 
-	        // append blank row last, if necessary
-	        if (!rowData.length || _showBlank) {
-	            _showBlank = false;
-	            rowData.push({ index: rowData.length, key: '', value: '' });
-	        }
+	      context.surface().classed('nope-suppressed', false).classed('nope-disabled', false);
+	    }
+	  }
 
+	  function start(d3_event, entity) {
+	    _wasMidpoint = entity.type === 'midpoint';
+	    var hasHidden = context.features().hasHiddenConnections(entity, context.graph());
+	    _isCancelled = !context.editable() || d3_event.shiftKey || hasHidden;
 
-	        // View Options
-	        var options = wrap.selectAll('.raw-tag-options')
-	            .data([0]);
+	    if (_isCancelled) {
+	      if (hasHidden) {
+	        context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t('modes.drag_node.connected_to_hidden'))();
+	      }
 
-	        options.exit()
-	            .remove();
+	      return drag.cancel();
+	    }
 
-	        var optionsEnter = options.enter()
-	            .insert('div', ':first-child')
-	            .attr('class', 'raw-tag-options');
+	    if (_wasMidpoint) {
+	      var midpoint = entity;
+	      entity = osmNode();
+	      context.perform(actionAddMidpoint(midpoint, entity));
+	      entity = context.entity(entity.id); // get post-action entity
 
-	        var optionEnter = optionsEnter.selectAll('.raw-tag-option')
-	            .data(availableViews, function(d) { return d.id; })
-	            .enter();
+	      var vertex = context.surface().selectAll('.' + entity.id);
+	      drag.targetNode(vertex.node()).targetEntity(entity);
+	    } else {
+	      context.perform(actionNoop());
+	    }
 
-	        optionEnter
-	            .append('button')
-	            .attr('class', function(d) {
-	                return 'raw-tag-option raw-tag-option-' + d.id + (_tagView === d.id ? ' selected' : '');
-	            })
-	            .attr('title', function(d) { return _t('icons.' + d.id); })
-	            .on('click', function(d) {
-	                _tagView = d.id;
-	                corePreferences('raw-tag-editor-view', d.id);
+	    _activeEntity = entity;
+	    _startLoc = entity.loc;
+	    hover.ignoreVertex(entity.geometry(context.graph()) === 'vertex');
+	    context.surface().selectAll('.' + _activeEntity.id).classed('active', true);
+	    context.enter(mode);
+	  } // related code
+	  // - `behavior/draw.js` `datum()`
 
-	                wrap.selectAll('.raw-tag-option')
-	                    .classed('selected', function(datum) { return datum === d; });
 
-	                wrap.selectAll('.tag-text')
-	                    .classed('hide', (d.id !== 'text'))
-	                    .each(setTextareaHeight);
+	  function datum(d3_event) {
+	    if (!d3_event || d3_event.altKey) {
+	      return {};
+	    } else {
+	      // When dragging, snap only to touch targets..
+	      // (this excludes area fills and active drawing elements)
+	      var d = d3_event.target.__data__;
+	      return d && d.properties && d.properties.target ? d : {};
+	    }
+	  }
+
+	  function doMove(d3_event, entity, nudge) {
+	    nudge = nudge || [0, 0];
+	    var currPoint = d3_event && d3_event.point || context.projection(_lastLoc);
+	    var currMouse = geoVecSubtract(currPoint, nudge);
+	    var loc = context.projection.invert(currMouse);
+	    var target, edge;
+
+	    if (!_nudgeInterval) {
+	      // If not nudging at the edge of the viewport, try to snap..
+	      // related code
+	      // - `mode/drag_node.js`     `doMove()`
+	      // - `behavior/draw.js`      `click()`
+	      // - `behavior/draw_way.js`  `move()`
+	      var d = datum(d3_event);
+	      target = d && d.properties && d.properties.entity;
+	      var targetLoc = target && target.loc;
+	      var targetNodes = d && d.properties && d.properties.nodes;
+
+	      if (targetLoc) {
+	        // snap to node/vertex - a point target with `.loc`
+	        if (shouldSnapToNode(target)) {
+	          loc = targetLoc;
+	        }
+	      } else if (targetNodes) {
+	        // snap to way - a line target with `.nodes`
+	        edge = geoChooseEdge(targetNodes, context.map().mouse(), context.projection, end.id);
 
-	                wrap.selectAll('.tag-list, .add-row')
-	                    .classed('hide', (d.id !== 'list'));
-	            })
-	            .each(function(d) {
-	                select(this)
-	                    .call(svgIcon(d.icon));
-	            });
+	        if (edge) {
+	          loc = edge.loc;
+	        }
+	      }
+	    }
 
+	    context.replace(actionMoveNode(entity.id, loc)); // Below here: validations
 
-	        // View as Text
-	        var textData = rowsToText(rowData);
-	        var textarea = wrap.selectAll('.tag-text')
-	            .data([0]);
+	    var isInvalid = false; // Check if this connection to `target` could cause relations to break..
 
-	        textarea = textarea.enter()
-	            .append('textarea')
-	            .attr('class', 'tag-text' + (_tagView !== 'text' ? ' hide' : ''))
-	            .call(utilNoAuto)
-	            .attr('placeholder', _t('inspector.key_value'))
-	            .attr('spellcheck', 'false')
-	            .merge(textarea);
+	    if (target) {
+	      isInvalid = hasRelationConflict(entity, target, edge, context.graph());
+	    } // Check if this drag causes the geometry to break..
 
-	        textarea
-	            .call(utilGetSetValue, textData)
-	            .each(setTextareaHeight)
-	            .on('input', setTextareaHeight)
-	            .on('blur', textChanged)
-	            .on('change', textChanged);
 
+	    if (!isInvalid) {
+	      isInvalid = hasInvalidGeometry(entity, context.graph());
+	    }
 
-	        // View as List
-	        var list = wrap.selectAll('.tag-list')
-	            .data([0]);
+	    var nope = context.surface().classed('nope');
 
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'tag-list' + (_tagView !== 'list' ? ' hide' : ''))
-	            .merge(list);
+	    if (isInvalid === 'relation' || isInvalid === 'restriction') {
+	      if (!nope) {
+	        // about to nope - show hint
+	        context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t('operations.connect.' + isInvalid, {
+	          relation: _mainPresetIndex.item('type/restriction').name()
+	        }))();
+	      }
+	    } else if (isInvalid) {
+	      var errorID = isInvalid === 'line' ? 'lines' : 'areas';
+	      context.ui().flash.duration(3000).iconName('#iD-icon-no').label(_t('self_intersection.error.' + errorID))();
+	    } else {
+	      if (nope) {
+	        // about to un-nope, remove hint
+	        context.ui().flash.duration(1).label('')();
+	      }
+	    }
 
+	    var nopeDisabled = context.surface().classed('nope-disabled');
 
-	        // Container for the Add button
-	        var addRowEnter = wrap.selectAll('.add-row')
-	            .data([0])
-	            .enter()
-	            .append('div')
-	            .attr('class', 'add-row' + (_tagView !== 'list' ? ' hide' : ''));
+	    if (nopeDisabled) {
+	      context.surface().classed('nope', false).classed('nope-suppressed', isInvalid);
+	    } else {
+	      context.surface().classed('nope', isInvalid).classed('nope-suppressed', false);
+	    }
 
-	        addRowEnter
-	            .append('button')
-	            .attr('class', 'add-tag')
-	            .call(svgIcon('#iD-icon-plus', 'light'))
-	            .on('click', addTag);
+	    _lastLoc = loc;
+	  } // Uses `actionConnect.disabled()` to know whether this connection is ok..
 
-	        addRowEnter
-	            .append('div')
-	            .attr('class', 'space-value');   // preserve space
 
-	        addRowEnter
-	            .append('div')
-	            .attr('class', 'space-buttons');  // preserve space
+	  function hasRelationConflict(entity, target, edge, graph) {
+	    var testGraph = graph.update(); // copy
+	    // if snapping to way - add midpoint there and consider that the target..
 
+	    if (edge) {
+	      var midpoint = osmNode();
+	      var action = actionAddMidpoint({
+	        loc: edge.loc,
+	        edge: [target.nodes[edge.index - 1], target.nodes[edge.index]]
+	      }, midpoint);
+	      testGraph = action(testGraph);
+	      target = midpoint;
+	    } // can we connect to it?
 
-	        // Tag list items
-	        var items = list.selectAll('.tag-row')
-	            .data(rowData, function(d) { return d.key; });
 
-	        items.exit()
-	            .each(unbind)
-	            .remove();
+	    var ids = [entity.id, target.id];
+	    return actionConnect(ids).disabled(testGraph);
+	  }
 
+	  function hasInvalidGeometry(entity, graph) {
+	    var parents = graph.parentWays(entity);
+	    var i, j, k;
 
-	        // Enter
-	        var itemsEnter = items.enter()
-	            .append('li')
-	            .attr('class', 'tag-row')
-	            .classed('readonly', isReadOnly);
+	    for (i = 0; i < parents.length; i++) {
+	      var parent = parents[i];
+	      var nodes = [];
+	      var activeIndex = null; // which multipolygon ring contains node being dragged
+	      // test any parent multipolygons for valid geometry
 
-	        var innerWrap = itemsEnter.append('div')
-	            .attr('class', 'inner-wrap');
+	      var relations = graph.parentRelations(parent);
 
-	        innerWrap
-	            .append('div')
-	            .attr('class', 'key-wrap')
-	            .append('input')
-	            .property('type', 'text')
-	            .attr('class', 'key')
-	            .call(utilNoAuto)
-	            .on('blur', keyChange)
-	            .on('change', keyChange);
-
-	        innerWrap
-	            .append('div')
-	            .attr('class', 'value-wrap')
-	            .append('input')
-	            .property('type', 'text')
-	            .attr('class', 'value')
-	            .call(utilNoAuto)
-	            .on('blur', valueChange)
-	            .on('change', valueChange)
-	            .on('keydown.push-more', pushMore);
-
-	        innerWrap
-	            .append('button')
-	            .attr('tabindex', -1)
-	            .attr('class', 'form-field-button remove')
-	            .attr('title', _t('icons.remove'))
-	            .call(svgIcon('#iD-operation-delete'));
-
-
-	        // Update
-	        items = items
-	            .merge(itemsEnter)
-	            .sort(function(a, b) { return a.index - b.index; });
-
-	        items
-	            .each(function(d) {
-	                var row = select(this);
-	                var key = row.select('input.key');      // propagate bound data
-	                var value = row.select('input.value');  // propagate bound data
-
-	                if (_entityIDs && taginfo && _state !== 'hover') {
-	                    bindTypeahead(key, value);
-	                }
+	      for (j = 0; j < relations.length; j++) {
+	        if (!relations[j].isMultipolygon()) continue;
+	        var rings = osmJoinWays(relations[j].members, graph); // find active ring and test it for self intersections
 
-	                var referenceOptions = { key: d.key };
-	                if (typeof d.value === 'string') {
-	                    referenceOptions.value = d.value;
-	                }
-	                var reference = uiTagReference(referenceOptions);
+	        for (k = 0; k < rings.length; k++) {
+	          nodes = rings[k].nodes;
 
-	                if (_state === 'hover') {
-	                    reference.showing(false);
-	                }
+	          if (nodes.find(function (n) {
+	            return n.id === entity.id;
+	          })) {
+	            activeIndex = k;
 
-	                row.select('.inner-wrap')      // propagate bound data
-	                    .call(reference.button);
+	            if (geoHasSelfIntersections(nodes, entity.id)) {
+	              return 'multipolygonMember';
+	            }
+	          }
 
-	                row.call(reference.body);
+	          rings[k].coords = nodes.map(function (n) {
+	            return n.loc;
+	          });
+	        } // test active ring for intersections with other rings in the multipolygon
 
-	                row.select('button.remove');   // propagate bound data
-	            });
 
-	        items.selectAll('input.key')
-	            .attr('title', function(d) { return d.key; })
-	            .call(utilGetSetValue, function(d) { return d.key; })
-	            .attr('readonly', function(d) {
-	                return (isReadOnly(d) || (typeof d.value !== 'string')) || null;
-	            });
+	        for (k = 0; k < rings.length; k++) {
+	          if (k === activeIndex) continue; // make sure active ring doesn't cross passive rings
 
-	        items.selectAll('input.value')
-	            .attr('title', function(d) {
-	                return Array.isArray(d.value) ? d.value.filter(Boolean).join('\n') : d.value;
-	            })
-	            .classed('mixed', function(d) {
-	                return Array.isArray(d.value);
-	            })
-	            .attr('placeholder', function(d) {
-	                return typeof d.value === 'string' ? null : _t('inspector.multiple_values');
-	            })
-	            .call(utilGetSetValue, function(d) {
-	                return typeof d.value === 'string' ? d.value : '';
-	            })
-	            .attr('readonly', function(d) {
-	                return isReadOnly(d) || null;
-	            });
+	          if (geoHasLineIntersections(rings[activeIndex].nodes, rings[k].nodes, entity.id)) {
+	            return 'multipolygonRing';
+	          }
+	        }
+	      } // If we still haven't tested this node's parent way for self-intersections.
+	      // (because it's not a member of a multipolygon), test it now.
 
-	        items.selectAll('button.remove')
-	            .on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'down', removeTag);  // 'click' fires too late - #5878
 
-	    }
+	      if (activeIndex === null) {
+	        nodes = parent.nodes.map(function (nodeID) {
+	          return graph.entity(nodeID);
+	        });
 
-	    function isReadOnly(d) {
-	        for (var i = 0; i < _readOnlyTags.length; i++) {
-	            if (d.key.match(_readOnlyTags[i]) !== null) {
-	                return true;
-	            }
+	        if (nodes.length && geoHasSelfIntersections(nodes, entity.id)) {
+	          return parent.geometry(graph);
 	        }
-	        return false;
+	      }
 	    }
 
-	    function setTextareaHeight() {
-	        if (_tagView !== 'text') { return; }
+	    return false;
+	  }
 
-	        var selection = select(this);
-	        selection.style('height', null);
-	        selection.style('height', selection.node().scrollHeight + 5 + 'px');
-	    }
+	  function move(d3_event, entity, point) {
+	    if (_isCancelled) return;
+	    d3_event.stopPropagation();
+	    context.surface().classed('nope-disabled', d3_event.altKey);
+	    _lastLoc = context.projection.invert(point);
+	    doMove(d3_event, entity);
+	    var nudge = geoViewportEdge(point, context.map().dimensions());
 
-	    function stringify(s) {
-	        return JSON.stringify(s).slice(1, -1);   // without leading/trailing "
+	    if (nudge) {
+	      startNudge(d3_event, entity, nudge);
+	    } else {
+	      stopNudge();
+	    }
+	  }
+
+	  function end(d3_event, entity) {
+	    if (_isCancelled) return;
+	    var wasPoint = entity.geometry(context.graph()) === 'point';
+	    var d = datum(d3_event);
+	    var nope = d && d.properties && d.properties.nope || context.surface().classed('nope');
+	    var target = d && d.properties && d.properties.entity; // entity to snap to
+
+	    if (nope) {
+	      // bounce back
+	      context.perform(_actionBounceBack(entity.id, _startLoc));
+	    } else if (target && target.type === 'way') {
+	      var choice = geoChooseEdge(context.graph().childNodes(target), context.map().mouse(), context.projection, entity.id);
+	      context.replace(actionAddMidpoint({
+	        loc: choice.loc,
+	        edge: [target.nodes[choice.index - 1], target.nodes[choice.index]]
+	      }, entity), connectAnnotation(entity, target));
+	    } else if (target && target.type === 'node' && shouldSnapToNode(target)) {
+	      context.replace(actionConnect([target.id, entity.id]), connectAnnotation(entity, target));
+	    } else if (_wasMidpoint) {
+	      context.replace(actionNoop(), _t('operations.add.annotation.vertex'));
+	    } else {
+	      context.replace(actionNoop(), moveAnnotation(entity));
 	    }
 
-	    function unstringify(s) {
-	        var leading = '';
-	        var trailing = '';
-	        if (s.length < 1 || s.charAt(0) !== '"') {
-	            leading = '"';
-	        }
-	        if (s.length < 2 || s.charAt(s.length - 1) !== '"' ||
-	            (s.charAt(s.length - 1) === '"' && s.charAt(s.length - 2) === '\\')
-	        ) {
-	            trailing = '"';
-	        }
-	        return JSON.parse(leading + s + trailing);
+	    if (wasPoint) {
+	      context.enter(modeSelect(context, [entity.id]));
+	    } else {
+	      var reselection = _restoreSelectedIDs.filter(function (id) {
+	        return context.graph().hasEntity(id);
+	      });
+
+	      if (reselection.length) {
+	        context.enter(modeSelect(context, reselection));
+	      } else {
+	        context.enter(modeBrowse(context));
+	      }
 	    }
+	  }
 
-	    function rowsToText(rows) {
-	        var str = rows
-	            .filter(function(row) { return row.key && row.key.trim() !== ''; })
-	            .map(function(row) {
-	                var rawVal = row.value;
-	                if (typeof rawVal !== 'string') { rawVal = '*'; }
-	                var val = rawVal ? stringify(rawVal) : '';
-	                return stringify(row.key) + '=' + val;
-	            })
-	            .join('\n');
+	  function _actionBounceBack(nodeID, toLoc) {
+	    var moveNode = actionMoveNode(nodeID, toLoc);
 
-	        if (_state !== 'hover' && str.length) {
-	            return str + '\n';
-	        }
-	        return  str;
-	    }
+	    var action = function action(graph, t) {
+	      // last time through, pop off the bounceback perform.
+	      // it will then overwrite the initial perform with a moveNode that does nothing
+	      if (t === 1) context.pop();
+	      return moveNode(graph, t);
+	    };
 
-	    function textChanged() {
-	        var newText = this.value.trim();
-	        var newTags = {};
-	        newText.split('\n').forEach(function(row) {
-	            var m = row.match(/^\s*([^=]+)=(.*)$/);
-	            if (m !== null) {
-	                var k = context.cleanTagKey(unstringify(m[1].trim()));
-	                var v = context.cleanTagValue(unstringify(m[2].trim()));
-	                newTags[k] = v;
-	            }
-	        });
+	    action.transitionable = true;
+	    return action;
+	  }
 
-	        var tagDiff = utilTagDiff(_tags, newTags);
-	        if (!tagDiff.length) { return; }
+	  function cancel() {
+	    drag.cancel();
+	    context.enter(modeBrowse(context));
+	  }
 
-	        _pendingChange  = _pendingChange || {};
+	  var drag = behaviorDrag().selector('.layer-touch.points .target').surface(context.container().select('.main-map').node()).origin(origin).on('start', start).on('move', move).on('end', end);
 
-	        tagDiff.forEach(function(change) {
-	            if (isReadOnly({ key: change.key })) { return; }
+	  mode.enter = function () {
+	    context.install(hover);
+	    context.install(edit);
+	    select(window).on('keydown.dragNode', keydown).on('keyup.dragNode', keyup);
+	    context.history().on('undone.drag-node', cancel);
+	  };
 
-	            // skip unchanged multiselection placeholders
-	            if (change.newVal === '*' && typeof change.oldVal !== 'string') { return; }
+	  mode.exit = function () {
+	    context.ui().sidebar.hover.cancel();
+	    context.uninstall(hover);
+	    context.uninstall(edit);
+	    select(window).on('keydown.dragNode', null).on('keyup.dragNode', null);
+	    context.history().on('undone.drag-node', null);
+	    _activeEntity = null;
+	    context.surface().classed('nope', false).classed('nope-suppressed', false).classed('nope-disabled', false).selectAll('.active').classed('active', false);
+	    stopNudge();
+	  };
 
-	            if (change.type === '-') {
-	                _pendingChange[change.key] = undefined;
-	            } else if (change.type === '+') {
-	                _pendingChange[change.key] = change.newVal || '';
-	            }
-	        });
+	  mode.selectedIDs = function () {
+	    if (!arguments.length) return _activeEntity ? [_activeEntity.id] : []; // no assign
 
-	        if (Object.keys(_pendingChange).length === 0) {
-	            _pendingChange = null;
-	            return;
-	        }
+	    return mode;
+	  };
 
-	        scheduleChange();
-	    }
+	  mode.activeID = function () {
+	    if (!arguments.length) return _activeEntity && _activeEntity.id; // no assign
 
-	    function pushMore() {
-	        // if pressing Tab on the last value field with content, add a blank row
-	        if (event.keyCode === 9 && !event.shiftKey &&
-	            section.selection().selectAll('.tag-list li:last-child input.value').node() === this &&
-	            utilGetSetValue(select(this))) {
-	            addTag();
-	        }
-	    }
+	    return mode;
+	  };
 
-	    function bindTypeahead(key, value) {
-	        if (isReadOnly(key.datum())) { return; }
+	  mode.restoreSelectedIDs = function (_) {
+	    if (!arguments.length) return _restoreSelectedIDs;
+	    _restoreSelectedIDs = _;
+	    return mode;
+	  };
 
-	        if (Array.isArray(value.datum().value)) {
-	            value.call(uiCombobox(context, 'tag-value')
-	                .minItems(1)
-	                .fetcher(function(value, callback) {
-	                    var keyString = utilGetSetValue(key);
-	                    if (!_tags[keyString]) { return; }
-	                    var data = _tags[keyString].filter(Boolean).map(function(tagValue) {
-	                        return {
-	                            value: tagValue,
-	                            title: tagValue
-	                        };
-	                    });
-	                    callback(data);
-	                }));
-	            return;
-	        }
+	  mode.behavior = drag;
+	  return mode;
+	}
 
-	        var geometry = context.graph().geometry(_entityIDs[0]);
+	var $$4 = _export;
+	var NativePromise = nativePromiseConstructor;
+	var fails$1 = fails$N;
+	var getBuiltIn = getBuiltIn$9;
+	var speciesConstructor = speciesConstructor$8;
+	var promiseResolve = promiseResolve$2;
+	var redefine = redefine$g.exports;
 
-	        key.call(uiCombobox(context, 'tag-key')
-	            .fetcher(function(value, callback) {
-	                taginfo.keys({
-	                    debounce: true,
-	                    geometry: geometry,
-	                    query: value
-	                }, function(err, data) {
-	                    if (!err) {
-	                        var filtered = data.filter(function(d) { return _tags[d.value] === undefined; });
-	                        callback(sort(value, filtered));
-	                    }
-	                });
-	            }));
+	// Safari bug https://bugs.webkit.org/show_bug.cgi?id=200829
+	var NON_GENERIC = !!NativePromise && fails$1(function () {
+	  NativePromise.prototype['finally'].call({ then: function () { /* empty */ } }, function () { /* empty */ });
+	});
 
-	        value.call(uiCombobox(context, 'tag-value')
-	            .fetcher(function(value, callback) {
-	                taginfo.values({
-	                    debounce: true,
-	                    key: utilGetSetValue(key),
-	                    geometry: geometry,
-	                    query: value
-	                }, function(err, data) {
-	                    if (!err) { callback(sort(value, data)); }
-	                });
-	            }));
+	// `Promise.prototype.finally` method
+	// https://tc39.es/ecma262/#sec-promise.prototype.finally
+	$$4({ target: 'Promise', proto: true, real: true, forced: NON_GENERIC }, {
+	  'finally': function (onFinally) {
+	    var C = speciesConstructor(this, getBuiltIn('Promise'));
+	    var isFunction = typeof onFinally == 'function';
+	    return this.then(
+	      isFunction ? function (x) {
+	        return promiseResolve(C, onFinally()).then(function () { return x; });
+	      } : onFinally,
+	      isFunction ? function (e) {
+	        return promiseResolve(C, onFinally()).then(function () { throw e; });
+	      } : onFinally
+	    );
+	  }
+	});
 
+	// makes sure that native promise-based APIs `Promise#finally` properly works with patched `Promise#then`
+	if (typeof NativePromise == 'function') {
+	  var method = getBuiltIn('Promise').prototype['finally'];
+	  if (NativePromise.prototype['finally'] !== method) {
+	    redefine(NativePromise.prototype, 'finally', method, { unsafe: true });
+	  }
+	}
 
-	        function sort(value, data) {
-	            var sameletter = [];
-	            var other = [];
-	            for (var i = 0; i < data.length; i++) {
-	                if (data[i].value.substring(0, value.length) === value) {
-	                    sameletter.push(data[i]);
-	                } else {
-	                    other.push(data[i]);
-	                }
-	            }
-	            return sameletter.concat(other);
-	        }
-	    }
+	function quickselect(arr, k, left, right, compare) {
+	  quickselectStep(arr, k, left || 0, right || arr.length - 1, compare || defaultCompare);
+	}
 
-	    function unbind() {
-	        var row = select(this);
+	function quickselectStep(arr, k, left, right, compare) {
+	  while (right > left) {
+	    if (right - left > 600) {
+	      var n = right - left + 1;
+	      var m = k - left + 1;
+	      var z = Math.log(n);
+	      var s = 0.5 * Math.exp(2 * z / 3);
+	      var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
+	      var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
+	      var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
+	      quickselectStep(arr, k, newLeft, newRight, compare);
+	    }
+
+	    var t = arr[k];
+	    var i = left;
+	    var j = right;
+	    swap(arr, left, k);
+	    if (compare(arr[right], t) > 0) swap(arr, left, right);
+
+	    while (i < j) {
+	      swap(arr, i, j);
+	      i++;
+	      j--;
 
-	        row.selectAll('input.key')
-	            .call(uiCombobox.off, context);
+	      while (compare(arr[i], t) < 0) {
+	        i++;
+	      }
 
-	        row.selectAll('input.value')
-	            .call(uiCombobox.off, context);
+	      while (compare(arr[j], t) > 0) {
+	        j--;
+	      }
 	    }
 
-	    function keyChange(d) {
-	        if (select(this).attr('readonly')) { return; }
+	    if (compare(arr[left], t) === 0) swap(arr, left, j);else {
+	      j++;
+	      swap(arr, j, right);
+	    }
+	    if (j <= k) left = j + 1;
+	    if (k <= j) right = j - 1;
+	  }
+	}
 
-	        var kOld = d.key;
+	function swap(arr, i, j) {
+	  var tmp = arr[i];
+	  arr[i] = arr[j];
+	  arr[j] = tmp;
+	}
 
-	        // exit if we are currently about to delete this row anyway - #6366
-	        if (_pendingChange && _pendingChange.hasOwnProperty(kOld) && _pendingChange[kOld] === undefined) { return; }
+	function defaultCompare(a, b) {
+	  return a < b ? -1 : a > b ? 1 : 0;
+	}
 
-	        var kNew = context.cleanTagKey(this.value.trim());
+	var RBush = /*#__PURE__*/function () {
+	  function RBush() {
+	    var maxEntries = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 9;
 
-	        // allow no change if the key should be readonly
-	        if (isReadOnly({ key: kNew })) {
-	            this.value = kOld;
-	            return;
-	        }
+	    _classCallCheck$1(this, RBush);
 
-	        if (kNew &&
-	            kNew !== kOld &&
-	            _tags[kNew] !== undefined) {
-	            // new key is already in use, switch focus to the existing row
+	    // max entries in a node is 9 by default; min node fill is 40% for best performance
+	    this._maxEntries = Math.max(4, maxEntries);
+	    this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
+	    this.clear();
+	  }
 
-	            this.value = kOld;                // reset the key
-	            section.selection().selectAll('.tag-list input.value')
-	                .each(function(d) {
-	                    if (d.key === kNew) {     // send focus to that other value combo instead
-	                        var input = select(this).node();
-	                        input.focus();
-	                        input.select();
-	                    }
-	                });
-	            return;
+	  _createClass$1(RBush, [{
+	    key: "all",
+	    value: function all() {
+	      return this._all(this.data, []);
+	    }
+	  }, {
+	    key: "search",
+	    value: function search(bbox) {
+	      var node = this.data;
+	      var result = [];
+	      if (!intersects(bbox, node)) return result;
+	      var toBBox = this.toBBox;
+	      var nodesToSearch = [];
+
+	      while (node) {
+	        for (var i = 0; i < node.children.length; i++) {
+	          var child = node.children[i];
+	          var childBBox = node.leaf ? toBBox(child) : child;
+
+	          if (intersects(bbox, childBBox)) {
+	            if (node.leaf) result.push(child);else if (contains(bbox, childBBox)) this._all(child, result);else nodesToSearch.push(child);
+	          }
 	        }
 
+	        node = nodesToSearch.pop();
+	      }
 
-	        var row = this.parentNode.parentNode;
-	        var inputVal = select(row).selectAll('input.value');
-	        var vNew = context.cleanTagValue(utilGetSetValue(inputVal));
+	      return result;
+	    }
+	  }, {
+	    key: "collides",
+	    value: function collides(bbox) {
+	      var node = this.data;
+	      if (!intersects(bbox, node)) return false;
+	      var nodesToSearch = [];
 
-	        _pendingChange = _pendingChange || {};
+	      while (node) {
+	        for (var i = 0; i < node.children.length; i++) {
+	          var child = node.children[i];
+	          var childBBox = node.leaf ? this.toBBox(child) : child;
 
-	        if (kOld) {
-	            _pendingChange[kOld] = undefined;
+	          if (intersects(bbox, childBBox)) {
+	            if (node.leaf || contains(bbox, childBBox)) return true;
+	            nodesToSearch.push(child);
+	          }
 	        }
 
-	        _pendingChange[kNew] = vNew;
+	        node = nodesToSearch.pop();
+	      }
+
+	      return false;
+	    }
+	  }, {
+	    key: "load",
+	    value: function load(data) {
+	      if (!(data && data.length)) return this;
 
-	        // update the ordered key index so this row doesn't change position
-	        var existingKeyIndex = _orderedKeys.indexOf(kOld);
-	        if (existingKeyIndex !== -1) { _orderedKeys[existingKeyIndex] = kNew; }
+	      if (data.length < this._minEntries) {
+	        for (var i = 0; i < data.length; i++) {
+	          this.insert(data[i]);
+	        }
 
-	        d.key = kNew;    // update datum to avoid exit/enter on tag update
-	        d.value = vNew;
+	        return this;
+	      } // recursively build the tree with the given data from scratch using OMT algorithm
 
-	        this.value = kNew;
-	        utilGetSetValue(inputVal, vNew);
-	        scheduleChange();
-	    }
 
-	    function valueChange(d) {
-	        if (isReadOnly(d)) { return; }
+	      var node = this._build(data.slice(), 0, data.length - 1, 0);
 
-	        // exit if this is a multiselection and no value was entered
-	        if (typeof d.value !== 'string' && !this.value) { return; }
+	      if (!this.data.children.length) {
+	        // save as is if tree is empty
+	        this.data = node;
+	      } else if (this.data.height === node.height) {
+	        // split root if trees have the same height
+	        this._splitRoot(this.data, node);
+	      } else {
+	        if (this.data.height < node.height) {
+	          // swap trees if inserted one is bigger
+	          var tmpNode = this.data;
+	          this.data = node;
+	          node = tmpNode;
+	        } // insert the small tree into the large tree at appropriate level
 
-	        // exit if we are currently about to delete this row anyway - #6366
-	        if (_pendingChange && _pendingChange.hasOwnProperty(d.key) && _pendingChange[d.key] === undefined) { return; }
 
-	        _pendingChange = _pendingChange || {};
+	        this._insert(node, this.data.height - node.height - 1, true);
+	      }
 
-	        _pendingChange[d.key] = context.cleanTagValue(this.value);
-	        scheduleChange();
+	      return this;
 	    }
+	  }, {
+	    key: "insert",
+	    value: function insert(item) {
+	      if (item) this._insert(item, this.data.height - 1);
+	      return this;
+	    }
+	  }, {
+	    key: "clear",
+	    value: function clear() {
+	      this.data = createNode([]);
+	      return this;
+	    }
+	  }, {
+	    key: "remove",
+	    value: function remove(item, equalsFn) {
+	      if (!item) return this;
+	      var node = this.data;
+	      var bbox = this.toBBox(item);
+	      var path = [];
+	      var indexes = [];
+	      var i, parent, goingUp; // depth-first iterative tree traversal
+
+	      while (node || path.length) {
+	        if (!node) {
+	          // go up
+	          node = path.pop();
+	          parent = path[path.length - 1];
+	          i = indexes.pop();
+	          goingUp = true;
+	        }
+
+	        if (node.leaf) {
+	          // check current node
+	          var index = findItem(item, node.children, equalsFn);
+
+	          if (index !== -1) {
+	            // item found, remove the item and condense tree upwards
+	            node.children.splice(index, 1);
+	            path.push(node);
 
-	    function removeTag(d) {
-	        if (isReadOnly(d)) { return; }
+	            this._condense(path);
 
-	        if (d.key === '') {    // removing the blank row
-	            _showBlank = false;
-	            section.reRender();
+	            return this;
+	          }
+	        }
 
-	        } else {
-	            // remove the key from the ordered key index
-	            _orderedKeys = _orderedKeys.filter(function(key) { return key !== d.key; });
+	        if (!goingUp && !node.leaf && contains(node, bbox)) {
+	          // go down
+	          path.push(node);
+	          indexes.push(i);
+	          i = 0;
+	          parent = node;
+	          node = node.children[0];
+	        } else if (parent) {
+	          // go right
+	          i++;
+	          node = parent.children[i];
+	          goingUp = false;
+	        } else node = null; // nothing found
 
-	            _pendingChange  = _pendingChange || {};
-	            _pendingChange[d.key] = undefined;
-	            scheduleChange();
-	        }
-	    }
+	      }
 
-	    function addTag() {
-	        // Delay render in case this click is blurring an edited combo.
-	        // Without the setTimeout, the `content` render would wipe out the pending tag change.
-	        window.setTimeout(function() {
-	            _showBlank = true;
-	            section.reRender();
-	            section.selection().selectAll('.tag-list li:last-child input.key').node().focus();
-	        }, 20);
+	      return this;
 	    }
+	  }, {
+	    key: "toBBox",
+	    value: function toBBox(item) {
+	      return item;
+	    }
+	  }, {
+	    key: "compareMinX",
+	    value: function compareMinX(a, b) {
+	      return a.minX - b.minX;
+	    }
+	  }, {
+	    key: "compareMinY",
+	    value: function compareMinY(a, b) {
+	      return a.minY - b.minY;
+	    }
+	  }, {
+	    key: "toJSON",
+	    value: function toJSON() {
+	      return this.data;
+	    }
+	  }, {
+	    key: "fromJSON",
+	    value: function fromJSON(data) {
+	      this.data = data;
+	      return this;
+	    }
+	  }, {
+	    key: "_all",
+	    value: function _all(node, result) {
+	      var nodesToSearch = [];
 
-	    function scheduleChange() {
-	        // Cache IDs in case the editor is reloaded before the change event is called. - #6028
-	        var entityIDs = _entityIDs;
-
-	        // Delay change in case this change is blurring an edited combo. - #5878
-	        window.setTimeout(function() {
-	            if (!_pendingChange) { return; }
+	      while (node) {
+	        if (node.leaf) result.push.apply(result, _toConsumableArray(node.children));else nodesToSearch.push.apply(nodesToSearch, _toConsumableArray(node.children));
+	        node = nodesToSearch.pop();
+	      }
 
-	            dispatch$1.call('change', this, entityIDs, _pendingChange);
-	            _pendingChange = null;
-	        }, 10);
+	      return result;
 	    }
+	  }, {
+	    key: "_build",
+	    value: function _build(items, left, right, height) {
+	      var N = right - left + 1;
+	      var M = this._maxEntries;
+	      var node;
 
+	      if (N <= M) {
+	        // reached leaf level; return leaf
+	        node = createNode(items.slice(left, right + 1));
+	        calcBBox(node, this.toBBox);
+	        return node;
+	      }
 
-	    section.state = function(val) {
-	        if (!arguments.length) { return _state; }
-	        if (_state !== val) {
-	            _orderedKeys = [];
-	            _state = val;
-	        }
-	        return section;
-	    };
+	      if (!height) {
+	        // target height of the bulk-loaded tree
+	        height = Math.ceil(Math.log(N) / Math.log(M)); // target number of root entries to maximize storage utilization
 
+	        M = Math.ceil(N / Math.pow(M, height - 1));
+	      }
 
-	    section.presets = function(val) {
-	        if (!arguments.length) { return _presets; }
-	        _presets = val;
-	        if (_presets && _presets.length && _presets[0].isFallback()) {
-	            section.disclosureExpanded(true);
-	        } else {
-	            section.disclosureExpanded(null);
-	        }
-	        return section;
-	    };
+	      node = createNode([]);
+	      node.leaf = false;
+	      node.height = height; // split the items into M mostly square tiles
 
+	      var N2 = Math.ceil(N / M);
+	      var N1 = N2 * Math.ceil(Math.sqrt(M));
+	      multiSelect(items, left, right, N1, this.compareMinX);
 
-	    section.tags = function(val) {
-	        if (!arguments.length) { return _tags; }
-	        _tags = val;
-	        return section;
-	    };
+	      for (var i = left; i <= right; i += N1) {
+	        var right2 = Math.min(i + N1 - 1, right);
+	        multiSelect(items, i, right2, N2, this.compareMinY);
 
+	        for (var j = i; j <= right2; j += N2) {
+	          var right3 = Math.min(j + N2 - 1, right2); // pack each entry recursively
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
-	            _entityIDs = val;
-	            _orderedKeys = [];
+	          node.children.push(this._build(items, j, right3, height - 1));
 	        }
-	        return section;
-	    };
-
-
-	    // pass an array of regular expressions to test against the tag key
-	    section.readOnlyTags = function(val) {
-	        if (!arguments.length) { return _readOnlyTags; }
-	        _readOnlyTags = val;
-	        return section;
-	    };
+	      }
 
+	      calcBBox(node, this.toBBox);
+	      return node;
+	    }
+	  }, {
+	    key: "_chooseSubtree",
+	    value: function _chooseSubtree(bbox, node, level, path) {
+	      while (true) {
+	        path.push(node);
+	        if (node.leaf || path.length - 1 === level) break;
+	        var minArea = Infinity;
+	        var minEnlargement = Infinity;
+	        var targetNode = void 0;
 
-	    return utilRebind(section, dispatch$1, 'on');
-	}
+	        for (var i = 0; i < node.children.length; i++) {
+	          var child = node.children[i];
+	          var area = bboxArea(child);
+	          var enlargement = enlargedArea(bbox, child) - area; // choose entry with the least area enlargement
 
-	function uiDataEditor(context) {
-	    var dataHeader = uiDataHeader();
-	    var rawTagEditor = uiSectionRawTagEditor('custom-data-tag-editor', context)
-	        .expandedByDefault(true)
-	        .readOnlyTags([/./]);
-	    var _datum;
+	          if (enlargement < minEnlargement) {
+	            minEnlargement = enlargement;
+	            minArea = area < minArea ? area : minArea;
+	            targetNode = child;
+	          } else if (enlargement === minEnlargement) {
+	            // otherwise choose one with the smallest area
+	            if (area < minArea) {
+	              minArea = area;
+	              targetNode = child;
+	            }
+	          }
+	        }
 
+	        node = targetNode || node.children[0];
+	      }
 
-	    function dataEditor(selection) {
+	      return node;
+	    }
+	  }, {
+	    key: "_insert",
+	    value: function _insert(item, level, isNode) {
+	      var bbox = isNode ? item : this.toBBox(item);
+	      var insertPath = []; // find the best node for accommodating the item, saving all nodes along the path too
 
-	        var header = selection.selectAll('.header')
-	            .data([0]);
+	      var node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node
 
-	        var headerEnter = header.enter()
-	            .append('div')
-	            .attr('class', 'header fillL');
 
-	        headerEnter
-	            .append('button')
-	            .attr('class', 'close')
-	            .on('click', function() {
-	                context.enter(modeBrowse(context));
-	            })
-	            .call(svgIcon('#iD-icon-close'));
+	      node.children.push(item);
+	      extend$1(node, bbox); // split on node overflow; propagate upwards if necessary
 
-	        headerEnter
-	            .append('h3')
-	            .text(_t('map_data.title'));
+	      while (level >= 0) {
+	        if (insertPath[level].children.length > this._maxEntries) {
+	          this._split(insertPath, level);
 
+	          level--;
+	        } else break;
+	      } // adjust bboxes along the insertion path
 
-	        var body = selection.selectAll('.body')
-	            .data([0]);
 
-	        body = body.enter()
-	            .append('div')
-	            .attr('class', 'body')
-	            .merge(body);
+	      this._adjustParentBBoxes(bbox, insertPath, level);
+	    } // split overflowed node into two
 
-	        var editor = body.selectAll('.data-editor')
-	            .data([0]);
+	  }, {
+	    key: "_split",
+	    value: function _split(insertPath, level) {
+	      var node = insertPath[level];
+	      var M = node.children.length;
+	      var m = this._minEntries;
 
-	        // enter/update
-	        editor.enter()
-	            .append('div')
-	            .attr('class', 'modal-section data-editor')
-	            .merge(editor)
-	            .call(dataHeader.datum(_datum));
+	      this._chooseSplitAxis(node, m, M);
 
-	        var rte = body.selectAll('.raw-tag-editor')
-	            .data([0]);
+	      var splitIndex = this._chooseSplitIndex(node, m, M);
 
-	        // enter/update
-	        rte.enter()
-	            .append('div')
-	            .attr('class', 'raw-tag-editor data-editor')
-	            .merge(rte)
-	            .call(rawTagEditor
-	                .tags((_datum && _datum.properties) || {})
-	                .state('hover')
-	                .render
-	            )
-	            .selectAll('textarea.tag-text')
-	            .attr('readonly', true)
-	            .classed('readonly', true);
+	      var newNode = createNode(node.children.splice(splitIndex, node.children.length - splitIndex));
+	      newNode.height = node.height;
+	      newNode.leaf = node.leaf;
+	      calcBBox(node, this.toBBox);
+	      calcBBox(newNode, this.toBBox);
+	      if (level) insertPath[level - 1].children.push(newNode);else this._splitRoot(node, newNode);
 	    }
+	  }, {
+	    key: "_splitRoot",
+	    value: function _splitRoot(node, newNode) {
+	      // split root node
+	      this.data = createNode([node, newNode]);
+	      this.data.height = node.height + 1;
+	      this.data.leaf = false;
+	      calcBBox(this.data, this.toBBox);
+	    }
+	  }, {
+	    key: "_chooseSplitIndex",
+	    value: function _chooseSplitIndex(node, m, M) {
+	      var index;
+	      var minOverlap = Infinity;
+	      var minArea = Infinity;
 
+	      for (var i = m; i <= M - m; i++) {
+	        var bbox1 = distBBox(node, 0, i, this.toBBox);
+	        var bbox2 = distBBox(node, i, M, this.toBBox);
+	        var overlap = intersectionArea(bbox1, bbox2);
+	        var area = bboxArea(bbox1) + bboxArea(bbox2); // choose distribution with minimum overlap
 
-	    dataEditor.datum = function(val) {
-	        if (!arguments.length) { return _datum; }
-	        _datum = val;
-	        return this;
-	    };
-
+	        if (overlap < minOverlap) {
+	          minOverlap = overlap;
+	          index = i;
+	          minArea = area < minArea ? area : minArea;
+	        } else if (overlap === minOverlap) {
+	          // otherwise choose distribution with minimum area
+	          if (area < minArea) {
+	            minArea = area;
+	            index = i;
+	          }
+	        }
+	      }
 
-	    return dataEditor;
-	}
+	      return index || M - m;
+	    } // sorts node children by the best axis for split
 
-	function modeSelectData(context, selectedDatum) {
-	    var mode = {
-	        id: 'select-data',
-	        button: 'browse'
-	    };
+	  }, {
+	    key: "_chooseSplitAxis",
+	    value: function _chooseSplitAxis(node, m, M) {
+	      var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX;
+	      var compareMinY = node.leaf ? this.compareMinY : compareNodeMinY;
 
-	    var keybinding = utilKeybinding('select-data');
-	    var dataEditor = uiDataEditor(context);
+	      var xMargin = this._allDistMargin(node, m, M, compareMinX);
 
-	    var behaviors = [
-	        behaviorBreathe(),
-	        behaviorHover(context),
-	        behaviorSelect(context),
-	        behaviorLasso(context),
-	        modeDragNode(context).behavior,
-	        modeDragNote(context).behavior
-	    ];
+	      var yMargin = this._allDistMargin(node, m, M, compareMinY); // if total distributions margin value is minimal for x, sort by minX,
+	      // otherwise it's already sorted by minY
 
 
-	    // class the data as selected, or return to browse mode if the data is gone
-	    function selectData(drawn) {
-	        var selection = context.surface().selectAll('.layer-mapdata .data' + selectedDatum.__featurehash__);
+	      if (xMargin < yMargin) node.children.sort(compareMinX);
+	    } // total margin of all possible split distributions where each node is at least m full
 
-	        if (selection.empty()) {
-	            // Return to browse mode if selected DOM elements have
-	            // disappeared because the user moved them out of view..
-	            var source = event && event.type === 'zoom' && event.sourceEvent;
-	            if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
-	                context.enter(modeBrowse(context));
-	            }
-	        } else {
-	            selection.classed('selected', true);
-	        }
-	    }
+	  }, {
+	    key: "_allDistMargin",
+	    value: function _allDistMargin(node, m, M, compare) {
+	      node.children.sort(compare);
+	      var toBBox = this.toBBox;
+	      var leftBBox = distBBox(node, 0, m, toBBox);
+	      var rightBBox = distBBox(node, M - m, M, toBBox);
+	      var margin = bboxMargin(leftBBox) + bboxMargin(rightBBox);
+
+	      for (var i = m; i < M - m; i++) {
+	        var child = node.children[i];
+	        extend$1(leftBBox, node.leaf ? toBBox(child) : child);
+	        margin += bboxMargin(leftBBox);
+	      }
 
+	      for (var _i = M - m - 1; _i >= m; _i--) {
+	        var _child = node.children[_i];
+	        extend$1(rightBBox, node.leaf ? toBBox(_child) : _child);
+	        margin += bboxMargin(rightBBox);
+	      }
 
-	    function esc() {
-	        if (context.container().select('.combobox').size()) { return; }
-	        context.enter(modeBrowse(context));
+	      return margin;
+	    }
+	  }, {
+	    key: "_adjustParentBBoxes",
+	    value: function _adjustParentBBoxes(bbox, path, level) {
+	      // adjust bboxes along the given tree path
+	      for (var i = level; i >= 0; i--) {
+	        extend$1(path[i], bbox);
+	      }
+	    }
+	  }, {
+	    key: "_condense",
+	    value: function _condense(path) {
+	      // go through the path, removing empty nodes and updating bboxes
+	      for (var i = path.length - 1, siblings; i >= 0; i--) {
+	        if (path[i].children.length === 0) {
+	          if (i > 0) {
+	            siblings = path[i - 1].children;
+	            siblings.splice(siblings.indexOf(path[i]), 1);
+	          } else this.clear();
+	        } else calcBBox(path[i], this.toBBox);
+	      }
 	    }
+	  }]);
 
+	  return RBush;
+	}();
 
-	    mode.zoomToSelected = function() {
-	        var extent = geoExtent(d3_geoBounds(selectedDatum));
-	        context.map().centerZoomEase(extent.center(), context.map().trimmedExtentZoom(extent));
-	    };
+	function findItem(item, items, equalsFn) {
+	  if (!equalsFn) return items.indexOf(item);
 
+	  for (var i = 0; i < items.length; i++) {
+	    if (equalsFn(item, items[i])) return i;
+	  }
 
-	    mode.enter = function() {
-	        behaviors.forEach(context.install);
+	  return -1;
+	} // calculate node's bbox from bboxes of its children
 
-	        keybinding
-	            .on(_t('inspector.zoom_to.key'), mode.zoomToSelected)
-	            .on('⎋', esc, true);
 
-	        select(document)
-	            .call(keybinding);
+	function calcBBox(node, toBBox) {
+	  distBBox(node, 0, node.children.length, toBBox, node);
+	} // min bounding rectangle of node children from k to p-1
 
-	        selectData();
 
-	        var sidebar = context.ui().sidebar;
-	        sidebar.show(dataEditor.datum(selectedDatum));
+	function distBBox(node, k, p, toBBox, destNode) {
+	  if (!destNode) destNode = createNode(null);
+	  destNode.minX = Infinity;
+	  destNode.minY = Infinity;
+	  destNode.maxX = -Infinity;
+	  destNode.maxY = -Infinity;
 
-	        // expand the sidebar, avoid obscuring the data if needed
-	        var extent = geoExtent(d3_geoBounds(selectedDatum));
-	        sidebar.expand(sidebar.intersects(extent));
+	  for (var i = k; i < p; i++) {
+	    var child = node.children[i];
+	    extend$1(destNode, node.leaf ? toBBox(child) : child);
+	  }
 
-	        context.map()
-	            .on('drawn.select-data', selectData);
-	    };
+	  return destNode;
+	}
 
+	function extend$1(a, b) {
+	  a.minX = Math.min(a.minX, b.minX);
+	  a.minY = Math.min(a.minY, b.minY);
+	  a.maxX = Math.max(a.maxX, b.maxX);
+	  a.maxY = Math.max(a.maxY, b.maxY);
+	  return a;
+	}
 
-	    mode.exit = function() {
-	        behaviors.forEach(context.uninstall);
+	function compareNodeMinX(a, b) {
+	  return a.minX - b.minX;
+	}
 
-	        select(document)
-	            .call(keybinding.unbind);
+	function compareNodeMinY(a, b) {
+	  return a.minY - b.minY;
+	}
 
-	        context.surface()
-	            .selectAll('.layer-mapdata .selected')
-	            .classed('selected hover', false);
+	function bboxArea(a) {
+	  return (a.maxX - a.minX) * (a.maxY - a.minY);
+	}
 
-	        context.map()
-	            .on('drawn.select-data', null);
+	function bboxMargin(a) {
+	  return a.maxX - a.minX + (a.maxY - a.minY);
+	}
 
-	        context.ui().sidebar
-	            .hide();
-	    };
+	function enlargedArea(a, b) {
+	  return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) * (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));
+	}
 
+	function intersectionArea(a, b) {
+	  var minX = Math.max(a.minX, b.minX);
+	  var minY = Math.max(a.minY, b.minY);
+	  var maxX = Math.min(a.maxX, b.maxX);
+	  var maxY = Math.min(a.maxY, b.maxY);
+	  return Math.max(0, maxX - minX) * Math.max(0, maxY - minY);
+	}
 
-	    return mode;
+	function contains(a, b) {
+	  return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
 	}
 
-	function uiImproveOsmComments() {
-	  var _qaItem;
+	function intersects(a, b) {
+	  return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
+	}
 
-	  function issueComments(selection) {
-	    // make the div immediately so it appears above the buttons
-	    var comments = selection.selectAll('.comments-container')
-	      .data([0]);
-
-	    comments = comments.enter()
-	      .append('div')
-	        .attr('class', 'comments-container')
-	      .merge(comments);
-
-	    // must retrieve comments from API before they can be displayed
-	    services.improveOSM.getComments(_qaItem)
-	      .then(function (d) {
-	        if (!d.comments) { return; } // nothing to do here
-
-	        var commentEnter = comments.selectAll('.comment')
-	          .data(d.comments)
-	          .enter()
-	          .append('div')
-	            .attr('class', 'comment');
-
-	        commentEnter
-	          .append('div')
-	            .attr('class', 'comment-avatar')
-	            .call(svgIcon('#iD-icon-avatar', 'comment-avatar-icon'));
-
-	        var mainEnter = commentEnter
-	          .append('div')
-	          .attr('class', 'comment-main');
-
-	        var metadataEnter = mainEnter
-	          .append('div')
-	            .attr('class', 'comment-metadata');
-
-	        metadataEnter
-	          .append('div')
-	            .attr('class', 'comment-author')
-	            .each(function(d) {
-	              var osm = services.osm;
-	              var selection = select(this);
-	              if (osm && d.username) {
-	                selection = selection
-	                  .append('a')
-	                  .attr('class', 'comment-author-link')
-	                  .attr('href', osm.userURL(d.username))
-	                  .attr('tabindex', -1)
-	                  .attr('target', '_blank');
-	              }
-	              selection
-	                .text(function (d) { return d.username; });
-	            });
+	function createNode(children) {
+	  return {
+	    children: children,
+	    height: 1,
+	    leaf: true,
+	    minX: Infinity,
+	    minY: Infinity,
+	    maxX: -Infinity,
+	    maxY: -Infinity
+	  };
+	} // sort an array so that items come in groups of n unsorted items, with groups sorted between each other;
+	// combines selection algorithm with binary divide & conquer approach
 
-	        metadataEnter
-	          .append('div')
-	            .attr('class', 'comment-date')
-	            .text(function (d) { return _t('note.status.commented', { when: localeDateString(d.timestamp) }); });
 
-	        mainEnter
-	          .append('div')
-	            .attr('class', 'comment-text')
-	          .append('p')
-	            .text(function (d) { return d.text; });
-	    })
-	    .catch(function (err) {
-	      console.log(err); // eslint-disable-line no-console
-	    });
-	  }
+	function multiSelect(arr, left, right, n, compare) {
+	  var stack = [left, right];
 
-	  function localeDateString(s) {
-	    if (!s) { return null; }
-	    var options = { day: 'numeric', month: 'short', year: 'numeric' };
-	    var d = new Date(s * 1000); // timestamp is served in seconds, date takes ms
-	    if (isNaN(d.getTime())) { return null; }
-	    return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+	  while (stack.length) {
+	    right = stack.pop();
+	    left = stack.pop();
+	    if (right - left <= n) continue;
+	    var mid = left + Math.ceil((right - left) / n / 2) * n;
+	    quickselect(arr, mid, left, right, compare);
+	    stack.push(left, mid, mid, right);
 	  }
+	}
 
-	  issueComments.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return issueComments;
-	  };
+	function responseText(response) {
+	  if (!response.ok) throw new Error(response.status + " " + response.statusText);
+	  return response.text();
+	}
 
-	  return issueComments;
+	function d3_text (input, init) {
+	  return fetch(input, init).then(responseText);
 	}
 
-	function uiImproveOsmDetails(context) {
-	  var _qaItem;
+	function responseJson(response) {
+	  if (!response.ok) throw new Error(response.status + " " + response.statusText);
+	  if (response.status === 204 || response.status === 205) return;
+	  return response.json();
+	}
 
+	function d3_json (input, init) {
+	  return fetch(input, init).then(responseJson);
+	}
 
-	  function issueDetail(d) {
-	    if (d.desc) { return d.desc; }
-	    var issueKey = d.issueKey;
-	    d.replacements = d.replacements || {};
-	    d.replacements.default = _t('inspector.unknown');  // special key `default` works as a fallback string
-	    return _t(("QA.improveOSM.error_types." + issueKey + ".description"), d.replacements);
-	  }
+	function parser(type) {
+	  return function (input, init) {
+	    return d3_text(input, init).then(function (text) {
+	      return new DOMParser().parseFromString(text, type);
+	    });
+	  };
+	}
 
+	var d3_xml = parser("application/xml");
+	var svg = parser("image/svg+xml");
 
-	  function improveOsmDetails(selection) {
-	    var details = selection.selectAll('.error-details')
-	      .data(
-	        (_qaItem ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
+	var tiler$6 = utilTiler();
+	var dispatch$7 = dispatch$8('loaded');
+	var _tileZoom$3 = 14;
+	var _krUrlRoot = 'https://www.keepright.at';
+	var _krData = {
+	  errorTypes: {},
+	  localizeStrings: {}
+	}; // This gets reassigned if reset
 
-	    details.exit()
-	      .remove();
+	var _cache$2;
 
-	    var detailsEnter = details.enter()
-	      .append('div')
-	        .attr('class', 'error-details qa-details-container');
+	var _krRuleset = [// no 20 - multiple node on same spot - these are mostly boundaries overlapping roads
+	30, 40, 50, 60, 70, 90, 100, 110, 120, 130, 150, 160, 170, 180, 190, 191, 192, 193, 194, 195, 196, 197, 198, 200, 201, 202, 203, 204, 205, 206, 207, 208, 210, 220, 230, 231, 232, 270, 280, 281, 282, 283, 284, 285, 290, 291, 292, 293, 294, 295, 296, 297, 298, 300, 310, 311, 312, 313, 320, 350, 360, 370, 380, 390, 400, 401, 402, 410, 411, 412, 413];
 
+	function abortRequest$6(controller) {
+	  if (controller) {
+	    controller.abort();
+	  }
+	}
 
-	    // description
-	    var descriptionEnter = detailsEnter
-	      .append('div')
-	        .attr('class', 'qa-details-subsection');
+	function abortUnwantedRequests$3(cache, tiles) {
+	  Object.keys(cache.inflightTile).forEach(function (k) {
+	    var wanted = tiles.find(function (tile) {
+	      return k === tile.id;
+	    });
 
-	    descriptionEnter
-	      .append('h4')
-	        .text(function () { return _t('QA.keepRight.detail_description'); });
+	    if (!wanted) {
+	      abortRequest$6(cache.inflightTile[k]);
+	      delete cache.inflightTile[k];
+	    }
+	  });
+	}
 
-	    descriptionEnter
-	      .append('div')
-	        .attr('class', 'qa-details-description-text')
-	        .html(issueDetail);
+	function encodeIssueRtree$2(d) {
+	  return {
+	    minX: d.loc[0],
+	    minY: d.loc[1],
+	    maxX: d.loc[0],
+	    maxY: d.loc[1],
+	    data: d
+	  };
+	} // Replace or remove QAItem from rtree
 
-	    // If there are entity links in the error message..
-	    var relatedEntities = [];
-	    descriptionEnter.selectAll('.error_entity_link, .error_object_link')
-	      .each(function() {
-	        var link = select(this);
-	        var isObjectLink = link.classed('error_object_link');
-	        var entityID = isObjectLink ?
-	          (utilEntityRoot(_qaItem.objectType) + _qaItem.objectId)
-	          : this.textContent;
-	        var entity = context.hasEntity(entityID);
 
-	        relatedEntities.push(entityID);
+	function updateRtree$3(item, replace) {
+	  _cache$2.rtree.remove(item, function (a, b) {
+	    return a.data.id === b.data.id;
+	  });
 
-	        // Add click handler
-	        link
-	          .on('mouseenter', function () {
-	            utilHighlightEntities([entityID], true, context);
-	          })
-	          .on('mouseleave', function () {
-	            utilHighlightEntities([entityID], false, context);
-	          })
-	          .on('click', function () {
-	            event.preventDefault();
+	  if (replace) {
+	    _cache$2.rtree.insert(item);
+	  }
+	}
 
-	            utilHighlightEntities([entityID], false, context);
+	function tokenReplacements(d) {
+	  if (!(d instanceof QAItem)) return;
+	  var htmlRegex = new RegExp(/<\/[a-z][\s\S]*>/);
+	  var replacements = {};
+	  var issueTemplate = _krData.errorTypes[d.whichType];
 
-	            var osmlayer = context.layers().layer('osm');
-	            if (!osmlayer.enabled()) {
-	              osmlayer.enabled(true);
-	            }
+	  if (!issueTemplate) {
+	    /* eslint-disable no-console */
+	    console.log('No Template: ', d.whichType);
+	    console.log('  ', d.description);
+	    /* eslint-enable no-console */
 
-	            context.map().centerZoom(_qaItem.loc, 20);
+	    return;
+	  } // some descriptions are just fixed text
 
-	            if (entity) {
-	              context.enter(modeSelect(context, [entityID]));
-	            } else {
-	              context.loadEntity(entityID, function () {
-	                context.enter(modeSelect(context, [entityID]));
-	              });
-	            }
-	          });
 
-	        // Replace with friendly name if possible
-	        // (The entity may not yet be loaded into the graph)
-	        if (entity) {
-	          var name = utilDisplayName(entity);  // try to use common name
+	  if (!issueTemplate.regex) return; // regex pattern should match description with variable details captured
 
-	          if (!name && !isObjectLink) {
-	            var preset = _mainPresetIndex.match(entity, context.graph());
-	            name = preset && !preset.isFallback() && preset.name();  // fallback to preset name
-	          }
+	  var errorRegex = new RegExp(issueTemplate.regex, 'i');
+	  var errorMatch = errorRegex.exec(d.description);
 
-	          if (name) {
-	            this.innerText = name;
-	          }
-	        }
-	      });
+	  if (!errorMatch) {
+	    /* eslint-disable no-console */
+	    console.log('Unmatched: ', d.whichType);
+	    console.log('  ', d.description);
+	    console.log('  ', errorRegex);
+	    /* eslint-enable no-console */
 
-	    // Don't hide entities related to this error - #5880
-	    context.features().forceVisible(relatedEntities);
-	    context.map().pan([0,0]);  // trigger a redraw
+	    return;
 	  }
 
-	  improveOsmDetails.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return improveOsmDetails;
-	  };
-
-	  return improveOsmDetails;
-	}
+	  for (var i = 1; i < errorMatch.length; i++) {
+	    // skip first
+	    var capture = errorMatch[i];
+	    var idType = void 0;
+	    idType = 'IDs' in issueTemplate ? issueTemplate.IDs[i - 1] : '';
 
-	function uiImproveOsmHeader() {
-	  var _qaItem;
+	    if (idType && capture) {
+	      // link IDs if present in the capture
+	      capture = parseError(capture, idType);
+	    } else if (htmlRegex.test(capture)) {
+	      // escape any html in non-IDs
+	      capture = '\\' + capture + '\\';
+	    } else {
+	      var compare = capture.toLowerCase();
 
+	      if (_krData.localizeStrings[compare]) {
+	        // some replacement strings can be localized
+	        capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
+	      }
+	    }
 
-	  function issueTitle(d) {
-	    var issueKey = d.issueKey;
-	    d.replacements = d.replacements || {};
-	    d.replacements.default = _t('inspector.unknown');  // special key `default` works as a fallback string
-	    return _t(("QA.improveOSM.error_types." + issueKey + ".title"), d.replacements);
+	    replacements['var' + i] = capture;
 	  }
 
+	  return replacements;
+	}
 
-	  function improveOsmHeader(selection) {
-	    var header = selection.selectAll('.qa-header')
-	      .data(
-	        (_qaItem ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
-
-	    header.exit()
-	      .remove();
-
-	    var headerEnter = header.enter()
-	      .append('div')
-	        .attr('class', 'qa-header');
-
-	    var svgEnter = headerEnter
-	      .append('div')
-	        .attr('class', 'qa-header-icon')
-	        .classed('new', function (d) { return d.id < 0; })
-	      .append('svg')
-	        .attr('width', '20px')
-	        .attr('height', '30px')
-	        .attr('viewbox', '0 0 20 30')
-	        .attr('class', function (d) { return ("preset-icon-28 qaItem " + (d.service) + " itemId-" + (d.id) + " itemType-" + (d.itemType)); });
-
-	    svgEnter
-	      .append('polygon')
-	        .attr('fill', 'currentColor')
-	        .attr('class', 'qaItem-fill')
-	        .attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
-
-	    svgEnter
-	      .append('use')
-	        .attr('class', 'icon-annotation')
-	        .attr('width', '13px')
-	        .attr('height', '13px')
-	        .attr('transform', 'translate(3.5, 5)')
-	        .attr('xlink:href', function (d) {
-	          var picon = d.icon;
-	          if (!picon) {
-	            return '';
-	          } else {
-	            var isMaki = /^maki-/.test(picon);
-	            return ("#" + picon + (isMaki ? '-11' : ''));
-	          }
-	        });
+	function parseError(capture, idType) {
+	  var compare = capture.toLowerCase();
 
-	    headerEnter
-	      .append('div')
-	        .attr('class', 'qa-header-label')
-	        .text(issueTitle);
+	  if (_krData.localizeStrings[compare]) {
+	    // some replacement strings can be localized
+	    capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
 	  }
 
-	  improveOsmHeader.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return improveOsmHeader;
-	  };
-
-	  return improveOsmHeader;
-	}
-
-	function uiImproveOsmEditor(context) {
-	  var dispatch$1 = dispatch('change');
-	  var qaDetails = uiImproveOsmDetails(context);
-	  var qaComments = uiImproveOsmComments();
-	  var qaHeader = uiImproveOsmHeader();
+	  switch (idType) {
+	    // link a string like "this node"
+	    case 'this':
+	      capture = linkErrorObject(capture);
+	      break;
 
-	  var _qaItem;
+	    case 'url':
+	      capture = linkURL(capture);
+	      break;
+	    // link an entity ID
 
-	  function improveOsmEditor(selection) {
+	    case 'n':
+	    case 'w':
+	    case 'r':
+	      capture = linkEntity(idType + capture);
+	      break;
+	    // some errors have more complex ID lists/variance
 
-	    var headerEnter = selection.selectAll('.header')
-	      .data([0])
-	      .enter()
-	      .append('div')
-	        .attr('class', 'header fillL');
+	    case '20':
+	      capture = parse20(capture);
+	      break;
 
-	    headerEnter
-	      .append('button')
-	        .attr('class', 'close')
-	        .on('click', function () { return context.enter(modeBrowse(context)); })
-	        .call(svgIcon('#iD-icon-close'));
+	    case '211':
+	      capture = parse211(capture);
+	      break;
 
-	    headerEnter
-	      .append('h3')
-	        .text(_t('QA.improveOSM.title'));
+	    case '231':
+	      capture = parse231(capture);
+	      break;
 
-	    var body = selection.selectAll('.body')
-	      .data([0]);
+	    case '294':
+	      capture = parse294(capture);
+	      break;
 
-	    body = body.enter()
-	      .append('div')
-	        .attr('class', 'body')
-	      .merge(body);
+	    case '370':
+	      capture = parse370(capture);
+	      break;
+	  }
 
-	    var editor = body.selectAll('.qa-editor')
-	      .data([0]);
+	  return capture;
 
-	    editor.enter()
-	      .append('div')
-	        .attr('class', 'modal-section qa-editor')
-	      .merge(editor)
-	        .call(qaHeader.issue(_qaItem))
-	        .call(qaDetails.issue(_qaItem))
-	        .call(qaComments.issue(_qaItem))
-	        .call(improveOsmSaveSection);
+	  function linkErrorObject(d) {
+	    return "<a class=\"error_object_link\">".concat(d, "</a>");
 	  }
 
-	  function improveOsmSaveSection(selection) {
-	    var isSelected = (_qaItem && _qaItem.id === context.selectedErrorID());
-	    var isShown = (_qaItem && (isSelected || _qaItem.newComment || _qaItem.comment));
-	    var saveSection = selection.selectAll('.qa-save')
-	      .data(
-	        (isShown ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
+	  function linkEntity(d) {
+	    return "<a class=\"error_entity_link\">".concat(d, "</a>");
+	  }
 
-	    // exit
-	    saveSection.exit()
-	      .remove();
+	  function linkURL(d) {
+	    return "<a class=\"kr_external_link\" target=\"_blank\" href=\"".concat(d, "\">").concat(d, "</a>");
+	  } // arbitrary node list of form: #ID, #ID, #ID...
 
-	    // enter
-	    var saveSectionEnter = saveSection.enter()
-	      .append('div')
-	        .attr('class', 'qa-save save-section cf');
-
-	    saveSectionEnter
-	      .append('h4')
-	        .attr('class', '.qa-save-header')
-	        .text(_t('note.newComment'));
-
-	    saveSectionEnter
-	      .append('textarea')
-	        .attr('class', 'new-comment-input')
-	        .attr('placeholder', _t('QA.keepRight.comment_placeholder'))
-	        .attr('maxlength', 1000)
-	        .property('value', function (d) { return d.newComment; })
-	        .call(utilNoAuto)
-	        .on('input', changeInput)
-	        .on('blur', changeInput);
 
-	    // update
-	    saveSection = saveSectionEnter
-	      .merge(saveSection)
-	        .call(qaSaveButtons);
+	  function parse211(capture) {
+	    var newList = [];
+	    var items = capture.split(', ');
+	    items.forEach(function (item) {
+	      // ID has # at the front
+	      var id = linkEntity('n' + item.slice(1));
+	      newList.push(id);
+	    });
+	    return newList.join(', ');
+	  } // arbitrary way list of form: #ID(layer),#ID(layer),#ID(layer)...
 
-	    function changeInput() {
-	      var input = select(this);
-	      var val = input.property('value').trim();
 
-	      if (val === '') {
-	        val = undefined;
-	      }
+	  function parse231(capture) {
+	    var newList = []; // unfortunately 'layer' can itself contain commas, so we split on '),'
 
-	      // store the unsaved comment with the issue itself
-	      _qaItem = _qaItem.update({ newComment: val });
+	    var items = capture.split('),');
+	    items.forEach(function (item) {
+	      var match = item.match(/\#(\d+)\((.+)\)?/);
 
-	      var qaService = services.improveOSM;
-	      if (qaService) {
-	        qaService.replaceItem(_qaItem);
+	      if (match !== null && match.length > 2) {
+	        newList.push(linkEntity('w' + match[1]) + ' ' + _t('QA.keepRight.errorTypes.231.layer', {
+	          layer: match[2]
+	        }));
 	      }
+	    });
+	    return newList.join(', ');
+	  } // arbitrary node/relation list of form: from node #ID,to relation #ID,to node #ID...
 
-	      saveSection
-	        .call(qaSaveButtons);
-	    }
-	  }
-
-	  function qaSaveButtons(selection) {
-	    var isSelected = (_qaItem && _qaItem.id === context.selectedErrorID());
-	    var buttonSection = selection.selectAll('.buttons')
-	      .data((isSelected ? [_qaItem] : []), function (d) { return d.status + d.id; });
-
-	    // exit
-	    buttonSection.exit()
-	      .remove();
 
-	    // enter
-	    var buttonEnter = buttonSection.enter()
-	      .append('div')
-	        .attr('class', 'buttons');
+	  function parse294(capture) {
+	    var newList = [];
+	    var items = capture.split(',');
+	    items.forEach(function (item) {
+	      // item of form "from/to node/relation #ID"
+	      item = item.split(' '); // to/from role is more clear in quotes
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button comment-button action')
-	        .text(_t('QA.keepRight.save_comment'));
+	      var role = "\"".concat(item[0], "\""); // first letter of node/relation provides the type
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button close-button action');
+	      var idType = item[1].slice(0, 1); // ID has # at the front
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button ignore-button action');
+	      var id = item[2].slice(1);
+	      id = linkEntity(idType + id);
+	      newList.push("".concat(role, " ").concat(item[1], " ").concat(id));
+	    });
+	    return newList.join(', ');
+	  } // may or may not include the string "(including the name 'name')"
 
-	    // update
-	    buttonSection = buttonSection
-	      .merge(buttonEnter);
 
-	    buttonSection.select('.comment-button')
-	      .attr('disabled', function (d) { return d.newComment ? null : true; })
-	      .on('click.comment', function(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var qaService = services.improveOSM;
-	        if (qaService) {
-	          qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-	        }
-	      });
+	  function parse370(capture) {
+	    if (!capture) return '';
+	    var match = capture.match(/\(including the name (\'.+\')\)/);
 
-	    buttonSection.select('.close-button')
-	      .text(function (d) {
-	        var andComment = (d.newComment ? '_comment' : '');
-	        return _t(("QA.keepRight.close" + andComment));
-	      })
-	      .on('click.close', function(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var qaService = services.improveOSM;
-	        if (qaService) {
-	          d.newStatus = 'SOLVED';
-	          qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-	        }
+	    if (match && match.length) {
+	      return _t('QA.keepRight.errorTypes.370.including_the_name', {
+	        name: match[1]
 	      });
+	    }
 
-	    buttonSection.select('.ignore-button')
-	      .text(function (d) {
-	        var andComment = (d.newComment ? '_comment' : '');
-	        return _t(("QA.keepRight.ignore" + andComment));
-	      })
-	      .on('click.ignore', function(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var qaService = services.improveOSM;
-	        if (qaService) {
-	          d.newStatus = 'INVALID';
-	          qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-	        }
-	      });
-	  }
+	    return '';
+	  } // arbitrary node list of form: #ID,#ID,#ID...
 
-	  // NOTE: Don't change method name until UI v3 is merged
-	  improveOsmEditor.error = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return improveOsmEditor;
-	  };
 
-	  return utilRebind(improveOsmEditor, dispatch$1, 'on');
+	  function parse20(capture) {
+	    var newList = [];
+	    var items = capture.split(',');
+	    items.forEach(function (item) {
+	      // ID has # at the front
+	      var id = linkEntity('n' + item.slice(1));
+	      newList.push(id);
+	    });
+	    return newList.join(', ');
+	  }
 	}
 
-	function uiKeepRightDetails(context) {
-	  var _qaItem;
-
+	var serviceKeepRight = {
+	  title: 'keepRight',
+	  init: function init() {
+	    _mainFileFetcher.get('keepRight').then(function (d) {
+	      return _krData = d;
+	    });
 
-	  function issueDetail(d) {
-	    var itemType = d.itemType;
-	    var parentIssueType = d.parentIssueType;
-	    var unknown = _t('inspector.unknown');
-	    var replacements = d.replacements || {};
-	    replacements.default = unknown;  // special key `default` works as a fallback string
+	    if (!_cache$2) {
+	      this.reset();
+	    }
 
-	    var detail = _t(("QA.keepRight.errorTypes." + itemType + ".description"), replacements);
-	    if (detail === unknown) {
-	      detail = _t(("QA.keepRight.errorTypes." + parentIssueType + ".description"), replacements);
+	    this.event = utilRebind(this, dispatch$7, 'on');
+	  },
+	  reset: function reset() {
+	    if (_cache$2) {
+	      Object.values(_cache$2.inflightTile).forEach(abortRequest$6);
 	    }
-	    return detail;
-	  }
 
+	    _cache$2 = {
+	      data: {},
+	      loadedTile: {},
+	      inflightTile: {},
+	      inflightPost: {},
+	      closed: {},
+	      rtree: new RBush()
+	    };
+	  },
+	  // KeepRight API:  http://osm.mueschelsoft.de/keepright/interfacing.php
+	  loadIssues: function loadIssues(projection) {
+	    var _this = this;
+
+	    var options = {
+	      format: 'geojson',
+	      ch: _krRuleset
+	    }; // determine the needed tiles to cover the view
+
+	    var tiles = tiler$6.zoomExtent([_tileZoom$3, _tileZoom$3]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	  function keepRightDetails(selection) {
-	    var details = selection.selectAll('.error-details')
-	      .data(
-	        (_qaItem ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
+	    abortUnwantedRequests$3(_cache$2, tiles); // issue new requests..
 
-	    details.exit()
-	      .remove();
+	    tiles.forEach(function (tile) {
+	      if (_cache$2.loadedTile[tile.id] || _cache$2.inflightTile[tile.id]) return;
+
+	      var _tile$extent$rectangl = tile.extent.rectangle(),
+	          _tile$extent$rectangl2 = _slicedToArray(_tile$extent$rectangl, 4),
+	          left = _tile$extent$rectangl2[0],
+	          top = _tile$extent$rectangl2[1],
+	          right = _tile$extent$rectangl2[2],
+	          bottom = _tile$extent$rectangl2[3];
+
+	      var params = Object.assign({}, options, {
+	        left: left,
+	        bottom: bottom,
+	        right: right,
+	        top: top
+	      });
+	      var url = "".concat(_krUrlRoot, "/export.php?") + utilQsString(params);
+	      var controller = new AbortController();
+	      _cache$2.inflightTile[tile.id] = controller;
+	      d3_json(url, {
+	        signal: controller.signal
+	      }).then(function (data) {
+	        delete _cache$2.inflightTile[tile.id];
+	        _cache$2.loadedTile[tile.id] = true;
+
+	        if (!data || !data.features || !data.features.length) {
+	          throw new Error('No Data');
+	        }
+
+	        data.features.forEach(function (feature) {
+	          var _feature$properties = feature.properties,
+	              itemType = _feature$properties.error_type,
+	              id = _feature$properties.error_id,
+	              _feature$properties$c = _feature$properties.comment,
+	              comment = _feature$properties$c === void 0 ? null : _feature$properties$c,
+	              objectId = _feature$properties.object_id,
+	              objectType = _feature$properties.object_type,
+	              schema = _feature$properties.schema,
+	              title = _feature$properties.title;
+	          var loc = feature.geometry.coordinates,
+	              _feature$properties$d = feature.properties.description,
+	              description = _feature$properties$d === void 0 ? '' : _feature$properties$d; // if there is a parent, save its error type e.g.:
+	          //  Error 191 = "highway-highway"
+	          //  Error 190 = "intersections without junctions"  (parent)
+
+	          var issueTemplate = _krData.errorTypes[itemType];
+	          var parentIssueType = (Math.floor(itemType / 10) * 10).toString(); // try to handle error type directly, fallback to parent error type.
+
+	          var whichType = issueTemplate ? itemType : parentIssueType;
+	          var whichTemplate = _krData.errorTypes[whichType]; // Rewrite a few of the errors at this point..
+	          // This is done to make them easier to linkify and translate.
+
+	          switch (whichType) {
+	            case '170':
+	              description = "This feature has a FIXME tag: ".concat(description);
+	              break;
 
-	    var detailsEnter = details.enter()
-	      .append('div')
-	        .attr('class', 'error-details qa-details-container');
+	            case '292':
+	            case '293':
+	              description = description.replace('A turn-', 'This turn-');
+	              break;
 
-	    // description
-	    var descriptionEnter = detailsEnter
-	      .append('div')
-	        .attr('class', 'qa-details-subsection');
+	            case '294':
+	            case '295':
+	            case '296':
+	            case '297':
+	            case '298':
+	              description = "This turn-restriction~".concat(description);
+	              break;
 
-	    descriptionEnter
-	      .append('h4')
-	        .text(function () { return _t('QA.keepRight.detail_description'); });
+	            case '300':
+	              description = 'This highway is missing a maxspeed tag';
+	              break;
 
-	    descriptionEnter
-	      .append('div')
-	        .attr('class', 'qa-details-description-text')
-	        .html(issueDetail);
+	            case '411':
+	            case '412':
+	            case '413':
+	              description = "This feature~".concat(description);
+	              break;
+	          } // move markers slightly so it doesn't obscure the geometry,
+	          // then move markers away from other coincident markers
+
+
+	          var coincident = false;
+
+	          do {
+	            // first time, move marker up. after that, move marker right.
+	            var delta = coincident ? [0.00001, 0] : [0, 0.00001];
+	            loc = geoVecAdd(loc, delta);
+	            var bbox = geoExtent(loc).bbox();
+	            coincident = _cache$2.rtree.search(bbox).length;
+	          } while (coincident);
+
+	          var d = new QAItem(loc, _this, itemType, id, {
+	            comment: comment,
+	            description: description,
+	            whichType: whichType,
+	            parentIssueType: parentIssueType,
+	            severity: whichTemplate.severity || 'error',
+	            objectId: objectId,
+	            objectType: objectType,
+	            schema: schema,
+	            title: title
+	          });
+	          d.replacements = tokenReplacements(d);
+	          _cache$2.data[id] = d;
 
-	    // If there are entity links in the error message..
-	    var relatedEntities = [];
-	    descriptionEnter.selectAll('.error_entity_link, .error_object_link')
-	      .each(function() {
-	        var link = select(this);
-	        var isObjectLink = link.classed('error_object_link');
-	        var entityID = isObjectLink ?
-	          (utilEntityRoot(_qaItem.objectType) + _qaItem.objectId)
-	          : this.textContent;
-	        var entity = context.hasEntity(entityID);
+	          _cache$2.rtree.insert(encodeIssueRtree$2(d));
+	        });
+	        dispatch$7.call('loaded');
+	      })["catch"](function () {
+	        delete _cache$2.inflightTile[tile.id];
+	        _cache$2.loadedTile[tile.id] = true;
+	      });
+	    });
+	  },
+	  postUpdate: function postUpdate(d, callback) {
+	    var _this2 = this;
 
-	        relatedEntities.push(entityID);
+	    if (_cache$2.inflightPost[d.id]) {
+	      return callback({
+	        message: 'Error update already inflight',
+	        status: -2
+	      }, d);
+	    }
 
-	        // Add click handler
-	        link
-	          .on('mouseenter', function () {
-	            utilHighlightEntities([entityID], true, context);
-	          })
-	          .on('mouseleave', function () {
-	            utilHighlightEntities([entityID], false, context);
-	          })
-	          .on('click', function () {
-	            event.preventDefault();
+	    var params = {
+	      schema: d.schema,
+	      id: d.id
+	    };
 
-	            utilHighlightEntities([entityID], false, context);
+	    if (d.newStatus) {
+	      params.st = d.newStatus;
+	    }
 
-	            var osmlayer = context.layers().layer('osm');
-	            if (!osmlayer.enabled()) {
-	              osmlayer.enabled(true);
-	            }
+	    if (d.newComment !== undefined) {
+	      params.co = d.newComment;
+	    } // NOTE: This throws a CORS err, but it seems successful.
+	    // We don't care too much about the response, so this is fine.
 
-	            context.map().centerZoomEase(_qaItem.loc, 20);
 
-	            if (entity) {
-	              context.enter(modeSelect(context, [entityID]));
-	            } else {
-	              context.loadEntity(entityID, function () {
-	                context.enter(modeSelect(context, [entityID]));
-	              });
-	            }
-	          });
+	    var url = "".concat(_krUrlRoot, "/comment.php?") + utilQsString(params);
+	    var controller = new AbortController();
+	    _cache$2.inflightPost[d.id] = controller; // Since this is expected to throw an error just continue as if it worked
+	    // (worst case scenario the request truly fails and issue will show up if iD restarts)
 
-	        // Replace with friendly name if possible
-	        // (The entity may not yet be loaded into the graph)
-	        if (entity) {
-	          var name = utilDisplayName(entity);  // try to use common name
+	    d3_json(url, {
+	      signal: controller.signal
+	    })["finally"](function () {
+	      delete _cache$2.inflightPost[d.id];
 
-	          if (!name && !isObjectLink) {
-	            var preset = _mainPresetIndex.match(entity, context.graph());
-	            name = preset && !preset.isFallback() && preset.name();  // fallback to preset name
-	          }
+	      if (d.newStatus === 'ignore') {
+	        // ignore permanently (false positive)
+	        _this2.removeItem(d);
+	      } else if (d.newStatus === 'ignore_t') {
+	        // ignore temporarily (error fixed)
+	        _this2.removeItem(d);
 
-	          if (name) {
-	            this.innerText = name;
-	          }
-	        }
-	      });
+	        _cache$2.closed["".concat(d.schema, ":").concat(d.id)] = true;
+	      } else {
+	        d = _this2.replaceItem(d.update({
+	          comment: d.newComment,
+	          newComment: undefined,
+	          newState: undefined
+	        }));
+	      }
 
-	    // Don't hide entities related to this issue - #5880
-	    context.features().forceVisible(relatedEntities);
-	    context.map().pan([0,0]);  // trigger a redraw
-	  }
+	      if (callback) callback(null, d);
+	    });
+	  },
+	  // Get all cached QAItems covering the viewport
+	  getItems: function getItems(projection) {
+	    var viewport = projection.clipExtent();
+	    var min = [viewport[0][0], viewport[1][1]];
+	    var max = [viewport[1][0], viewport[0][1]];
+	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	    return _cache$2.rtree.search(bbox).map(function (d) {
+	      return d.data;
+	    });
+	  },
+	  // Get a QAItem from cache
+	  // NOTE: Don't change method name until UI v3 is merged
+	  getError: function getError(id) {
+	    return _cache$2.data[id];
+	  },
+	  // Replace a single QAItem in the cache
+	  replaceItem: function replaceItem(item) {
+	    if (!(item instanceof QAItem) || !item.id) return;
+	    _cache$2.data[item.id] = item;
+	    updateRtree$3(encodeIssueRtree$2(item), true); // true = replace
 
-	  keepRightDetails.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return keepRightDetails;
-	  };
+	    return item;
+	  },
+	  // Remove a single QAItem from the cache
+	  removeItem: function removeItem(item) {
+	    if (!(item instanceof QAItem) || !item.id) return;
+	    delete _cache$2.data[item.id];
+	    updateRtree$3(encodeIssueRtree$2(item), false); // false = remove
+	  },
+	  issueURL: function issueURL(item) {
+	    return "".concat(_krUrlRoot, "/report_map.php?schema=").concat(item.schema, "&error=").concat(item.id);
+	  },
+	  // Get an array of issues closed during this session.
+	  // Used to populate `closed:keepright` changeset tag
+	  getClosedIDs: function getClosedIDs() {
+	    return Object.keys(_cache$2.closed).sort();
+	  }
+	};
 
-	  return keepRightDetails;
-	}
+	var tiler$5 = utilTiler();
+	var dispatch$6 = dispatch$8('loaded');
+	var _tileZoom$2 = 14;
+	var _impOsmUrls = {
+	  ow: 'https://grab.community.improve-osm.org/directionOfFlowService',
+	  mr: 'https://grab.community.improve-osm.org/missingGeoService',
+	  tr: 'https://grab.community.improve-osm.org/turnRestrictionService'
+	};
+	var _impOsmData = {
+	  icons: {}
+	}; // This gets reassigned if reset
 
-	function uiKeepRightHeader() {
-	  var _qaItem;
+	var _cache$1;
 
+	function abortRequest$5(i) {
+	  Object.values(i).forEach(function (controller) {
+	    if (controller) {
+	      controller.abort();
+	    }
+	  });
+	}
 
-	  function issueTitle(d) {
-	    var itemType = d.itemType;
-	    var parentIssueType = d.parentIssueType;
-	    var unknown = _t('inspector.unknown');
-	    var replacements = d.replacements || {};
-	    replacements.default = unknown;  // special key `default` works as a fallback string
+	function abortUnwantedRequests$2(cache, tiles) {
+	  Object.keys(cache.inflightTile).forEach(function (k) {
+	    var wanted = tiles.find(function (tile) {
+	      return k === tile.id;
+	    });
 
-	    var title = _t(("QA.keepRight.errorTypes." + itemType + ".title"), replacements);
-	    if (title === unknown) {
-	      title = _t(("QA.keepRight.errorTypes." + parentIssueType + ".title"), replacements);
+	    if (!wanted) {
+	      abortRequest$5(cache.inflightTile[k]);
+	      delete cache.inflightTile[k];
 	    }
-	    return title;
-	  }
+	  });
+	}
 
+	function encodeIssueRtree$1(d) {
+	  return {
+	    minX: d.loc[0],
+	    minY: d.loc[1],
+	    maxX: d.loc[0],
+	    maxY: d.loc[1],
+	    data: d
+	  };
+	} // Replace or remove QAItem from rtree
 
-	  function keepRightHeader(selection) {
-	    var header = selection.selectAll('.qa-header')
-	      .data(
-	        (_qaItem ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
 
-	    header.exit()
-	      .remove();
+	function updateRtree$2(item, replace) {
+	  _cache$1.rtree.remove(item, function (a, b) {
+	    return a.data.id === b.data.id;
+	  });
 
-	    var headerEnter = header.enter()
-	      .append('div')
-	        .attr('class', 'qa-header');
+	  if (replace) {
+	    _cache$1.rtree.insert(item);
+	  }
+	}
 
-	    var iconEnter = headerEnter
-	      .append('div')
-	        .attr('class', 'qa-header-icon')
-	        .classed('new', function (d) { return d.id < 0; });
+	function linkErrorObject(d) {
+	  return "<a class=\"error_object_link\">".concat(d, "</a>");
+	}
 
-	    iconEnter
-	      .append('div')
-	        .attr('class', function (d) { return ("preset-icon-28 qaItem " + (d.service) + " itemId-" + (d.id) + " itemType-" + (d.parentIssueType)); })
-	        .call(svgIcon('#iD-icon-bolt', 'qaItem-fill'));
+	function linkEntity(d) {
+	  return "<a class=\"error_entity_link\">".concat(d, "</a>");
+	}
 
-	    headerEnter
-	      .append('div')
-	        .attr('class', 'qa-header-label')
-	        .text(issueTitle);
+	function pointAverage(points) {
+	  if (points.length) {
+	    var sum = points.reduce(function (acc, point) {
+	      return geoVecAdd(acc, [point.lon, point.lat]);
+	    }, [0, 0]);
+	    return geoVecScale(sum, 1 / points.length);
+	  } else {
+	    return [0, 0];
 	  }
+	}
 
+	function relativeBearing(p1, p2) {
+	  var angle = Math.atan2(p2.lon - p1.lon, p2.lat - p1.lat);
 
-	  keepRightHeader.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return keepRightHeader;
-	  };
-
-	  return keepRightHeader;
-	}
+	  if (angle < 0) {
+	    angle += 2 * Math.PI;
+	  } // Return degrees
 
-	function uiViewOnKeepRight() {
-	  var _qaItem;
 
-	  function viewOnKeepRight(selection) {
-	    var url;
-	    if (services.keepRight && (_qaItem instanceof QAItem)) {
-	      url = services.keepRight.issueURL(_qaItem);
-	    }
+	  return angle * 180 / Math.PI;
+	} // Assuming range [0,360)
 
-	    var link = selection.selectAll('.view-on-keepRight')
-	      .data(url ? [url] : []);
 
-	    // exit
-	    link.exit()
-	      .remove();
+	function cardinalDirection(bearing) {
+	  var dir = 45 * Math.round(bearing / 45);
+	  var compass = {
+	    0: 'north',
+	    45: 'northeast',
+	    90: 'east',
+	    135: 'southeast',
+	    180: 'south',
+	    225: 'southwest',
+	    270: 'west',
+	    315: 'northwest',
+	    360: 'north'
+	  };
+	  return _t("QA.improveOSM.directions.".concat(compass[dir]));
+	} // Errors shouldn't obscure each other
 
-	    // enter
-	    var linkEnter = link.enter()
-	      .append('a')
-	        .attr('class', 'view-on-keepRight')
-	        .attr('target', '_blank')
-	        .attr('rel', 'noopener') // security measure
-	        .attr('href', function (d) { return d; })
-	        .call(svgIcon('#iD-icon-out-link', 'inline'));
 
-	    linkEnter
-	      .append('span')
-	        .text(_t('inspector.view_on_keepRight'));
-	  }
+	function preventCoincident$1(loc, bumpUp) {
+	  var coincident = false;
 
-	  viewOnKeepRight.what = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return viewOnKeepRight;
-	  };
+	  do {
+	    // first time, move marker up. after that, move marker right.
+	    var delta = coincident ? [0.00001, 0] : bumpUp ? [0, 0.00001] : [0, 0];
+	    loc = geoVecAdd(loc, delta);
+	    var bbox = geoExtent(loc).bbox();
+	    coincident = _cache$1.rtree.search(bbox).length;
+	  } while (coincident);
 
-	  return viewOnKeepRight;
+	  return loc;
 	}
 
-	function uiKeepRightEditor(context) {
-	  var dispatch$1 = dispatch('change');
-	  var qaDetails = uiKeepRightDetails(context);
-	  var qaHeader = uiKeepRightHeader();
+	var serviceImproveOSM = {
+	  title: 'improveOSM',
+	  init: function init() {
+	    _mainFileFetcher.get('qa_data').then(function (d) {
+	      return _impOsmData = d.improveOSM;
+	    });
 
-	  var _qaItem;
+	    if (!_cache$1) {
+	      this.reset();
+	    }
 
-	  function keepRightEditor(selection) {
+	    this.event = utilRebind(this, dispatch$6, 'on');
+	  },
+	  reset: function reset() {
+	    if (_cache$1) {
+	      Object.values(_cache$1.inflightTile).forEach(abortRequest$5);
+	    }
 
-	    var headerEnter = selection.selectAll('.header')
-	      .data([0])
-	      .enter()
-	      .append('div')
-	        .attr('class', 'header fillL');
+	    _cache$1 = {
+	      data: {},
+	      loadedTile: {},
+	      inflightTile: {},
+	      inflightPost: {},
+	      closed: {},
+	      rtree: new RBush()
+	    };
+	  },
+	  loadIssues: function loadIssues(projection) {
+	    var _this = this;
 
-	    headerEnter
-	      .append('button')
-	        .attr('class', 'close')
-	        .on('click', function () { return context.enter(modeBrowse(context)); })
-	        .call(svgIcon('#iD-icon-close'));
+	    var options = {
+	      client: 'iD',
+	      status: 'OPEN',
+	      zoom: '19' // Use a high zoom so that clusters aren't returned
 
-	    headerEnter
-	      .append('h3')
-	        .text(_t('QA.keepRight.title'));
+	    }; // determine the needed tiles to cover the view
 
+	    var tiles = tiler$5.zoomExtent([_tileZoom$2, _tileZoom$2]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	    var body = selection.selectAll('.body')
-	      .data([0]);
+	    abortUnwantedRequests$2(_cache$1, tiles); // issue new requests..
 
-	    body = body.enter()
-	      .append('div')
-	        .attr('class', 'body')
-	      .merge(body);
+	    tiles.forEach(function (tile) {
+	      if (_cache$1.loadedTile[tile.id] || _cache$1.inflightTile[tile.id]) return;
+
+	      var _tile$extent$rectangl = tile.extent.rectangle(),
+	          _tile$extent$rectangl2 = _slicedToArray(_tile$extent$rectangl, 4),
+	          east = _tile$extent$rectangl2[0],
+	          north = _tile$extent$rectangl2[1],
+	          west = _tile$extent$rectangl2[2],
+	          south = _tile$extent$rectangl2[3];
+
+	      var params = Object.assign({}, options, {
+	        east: east,
+	        south: south,
+	        west: west,
+	        north: north
+	      }); // 3 separate requests to store for each tile
 
-	    var editor = body.selectAll('.qa-editor')
-	      .data([0]);
+	      var requests = {};
+	      Object.keys(_impOsmUrls).forEach(function (k) {
+	        // We exclude WATER from missing geometry as it doesn't seem useful
+	        // We use most confident one-way and turn restrictions only, still have false positives
+	        var kParams = Object.assign({}, params, k === 'mr' ? {
+	          type: 'PARKING,ROAD,BOTH,PATH'
+	        } : {
+	          confidenceLevel: 'C1'
+	        });
+	        var url = "".concat(_impOsmUrls[k], "/search?") + utilQsString(kParams);
+	        var controller = new AbortController();
+	        requests[k] = controller;
+	        d3_json(url, {
+	          signal: controller.signal
+	        }).then(function (data) {
+	          delete _cache$1.inflightTile[tile.id][k];
+
+	          if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
+	            delete _cache$1.inflightTile[tile.id];
+	            _cache$1.loadedTile[tile.id] = true;
+	          } // Road segments at high zoom == oneways
+
+
+	          if (data.roadSegments) {
+	            data.roadSegments.forEach(function (feature) {
+	              // Position error at the approximate middle of the segment
+	              var points = feature.points,
+	                  wayId = feature.wayId,
+	                  fromNodeId = feature.fromNodeId,
+	                  toNodeId = feature.toNodeId;
+	              var itemId = "".concat(wayId).concat(fromNodeId).concat(toNodeId);
+	              var mid = points.length / 2;
+	              var loc; // Even number of points, find midpoint of the middle two
+	              // Odd number of points, use position of very middle point
+
+	              if (mid % 1 === 0) {
+	                loc = pointAverage([points[mid - 1], points[mid]]);
+	              } else {
+	                mid = points[Math.floor(mid)];
+	                loc = [mid.lon, mid.lat];
+	              } // One-ways can land on same segment in opposite direction
+
+
+	              loc = preventCoincident$1(loc, false);
+	              var d = new QAItem(loc, _this, k, itemId, {
+	                issueKey: k,
+	                // used as a category
+	                identifier: {
+	                  // used to post changes
+	                  wayId: wayId,
+	                  fromNodeId: fromNodeId,
+	                  toNodeId: toNodeId
+	                },
+	                objectId: wayId,
+	                objectType: 'way'
+	              }); // Variables used in the description
+
+	              d.replacements = {
+	                percentage: feature.percentOfTrips,
+	                num_trips: feature.numberOfTrips,
+	                highway: linkErrorObject(_t('QA.keepRight.error_parts.highway')),
+	                from_node: linkEntity('n' + feature.fromNodeId),
+	                to_node: linkEntity('n' + feature.toNodeId)
+	              };
+	              _cache$1.data[d.id] = d;
+
+	              _cache$1.rtree.insert(encodeIssueRtree$1(d));
+	            });
+	          } // Tiles at high zoom == missing roads
+
+
+	          if (data.tiles) {
+	            data.tiles.forEach(function (feature) {
+	              var type = feature.type,
+	                  x = feature.x,
+	                  y = feature.y,
+	                  numberOfTrips = feature.numberOfTrips;
+	              var geoType = type.toLowerCase();
+	              var itemId = "".concat(geoType).concat(x).concat(y).concat(numberOfTrips); // Average of recorded points should land on the missing geometry
+	              // Missing geometry could happen to land on another error
+
+	              var loc = pointAverage(feature.points);
+	              loc = preventCoincident$1(loc, false);
+	              var d = new QAItem(loc, _this, "".concat(k, "-").concat(geoType), itemId, {
+	                issueKey: k,
+	                identifier: {
+	                  x: x,
+	                  y: y
+	                }
+	              });
+	              d.replacements = {
+	                num_trips: numberOfTrips,
+	                geometry_type: _t("QA.improveOSM.geometry_types.".concat(geoType))
+	              }; // -1 trips indicates data came from a 3rd party
 
-	    editor.enter()
-	      .append('div')
-	        .attr('class', 'modal-section qa-editor')
-	      .merge(editor)
-	        .call(qaHeader.issue(_qaItem))
-	        .call(qaDetails.issue(_qaItem))
-	        .call(keepRightSaveSection);
+	              if (numberOfTrips === -1) {
+	                d.desc = _t('QA.improveOSM.error_types.mr.description_alt', d.replacements);
+	              }
 
+	              _cache$1.data[d.id] = d;
 
-	    var footer = selection.selectAll('.footer')
-	      .data([0]);
+	              _cache$1.rtree.insert(encodeIssueRtree$1(d));
+	            });
+	          } // Entities at high zoom == turn restrictions
+
+
+	          if (data.entities) {
+	            data.entities.forEach(function (feature) {
+	              var point = feature.point,
+	                  id = feature.id,
+	                  segments = feature.segments,
+	                  numberOfPasses = feature.numberOfPasses,
+	                  turnType = feature.turnType;
+	              var itemId = "".concat(id.replace(/[,:+#]/g, '_')); // Turn restrictions could be missing at same junction
+	              // We also want to bump the error up so node is accessible
+
+	              var loc = preventCoincident$1([point.lon, point.lat], true); // Elements are presented in a strange way
+
+	              var ids = id.split(',');
+	              var from_way = ids[0];
+	              var via_node = ids[3];
+	              var to_way = ids[2].split(':')[1];
+	              var d = new QAItem(loc, _this, k, itemId, {
+	                issueKey: k,
+	                identifier: id,
+	                objectId: via_node,
+	                objectType: 'node'
+	              }); // Travel direction along from_way clarifies the turn restriction
+
+	              var _segments$0$points = _slicedToArray(segments[0].points, 2),
+	                  p1 = _segments$0$points[0],
+	                  p2 = _segments$0$points[1];
+
+	              var dir_of_travel = cardinalDirection(relativeBearing(p1, p2)); // Variables used in the description
+
+	              d.replacements = {
+	                num_passed: numberOfPasses,
+	                num_trips: segments[0].numberOfTrips,
+	                turn_restriction: turnType.toLowerCase(),
+	                from_way: linkEntity('w' + from_way),
+	                to_way: linkEntity('w' + to_way),
+	                travel_direction: dir_of_travel,
+	                junction: linkErrorObject(_t('QA.keepRight.error_parts.this_node'))
+	              };
+	              _cache$1.data[d.id] = d;
+
+	              _cache$1.rtree.insert(encodeIssueRtree$1(d));
+
+	              dispatch$6.call('loaded');
+	            });
+	          }
+	        })["catch"](function () {
+	          delete _cache$1.inflightTile[tile.id][k];
 
-	    footer.enter()
-	      .append('div')
-	      .attr('class', 'footer')
-	      .merge(footer)
-	      .call(uiViewOnKeepRight().what(_qaItem));
-	  }
+	          if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
+	            delete _cache$1.inflightTile[tile.id];
+	            _cache$1.loadedTile[tile.id] = true;
+	          }
+	        });
+	      });
+	      _cache$1.inflightTile[tile.id] = requests;
+	    });
+	  },
+	  getComments: function getComments(item) {
+	    var _this2 = this;
 
+	    // If comments already retrieved no need to do so again
+	    if (item.comments) {
+	      return Promise.resolve(item);
+	    }
 
-	  function keepRightSaveSection(selection) {
-	    var isSelected = (_qaItem && _qaItem.id === context.selectedErrorID());
-	    var isShown = (_qaItem && (isSelected || _qaItem.newComment || _qaItem.comment));
-	    var saveSection = selection.selectAll('.qa-save')
-	      .data(
-	        (isShown ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
+	    var key = item.issueKey;
+	    var qParams = {};
 
-	    // exit
-	    saveSection.exit()
-	      .remove();
+	    if (key === 'ow') {
+	      qParams = item.identifier;
+	    } else if (key === 'mr') {
+	      qParams.tileX = item.identifier.x;
+	      qParams.tileY = item.identifier.y;
+	    } else if (key === 'tr') {
+	      qParams.targetId = item.identifier;
+	    }
 
-	    // enter
-	    var saveSectionEnter = saveSection.enter()
-	      .append('div')
-	        .attr('class', 'qa-save save-section cf');
-
-	    saveSectionEnter
-	      .append('h4')
-	        .attr('class', '.qa-save-header')
-	        .text(_t('QA.keepRight.comment'));
-
-	    saveSectionEnter
-	      .append('textarea')
-	        .attr('class', 'new-comment-input')
-	        .attr('placeholder', _t('QA.keepRight.comment_placeholder'))
-	        .attr('maxlength', 1000)
-	        .property('value', function (d) { return d.newComment || d.comment; })
-	        .call(utilNoAuto)
-	        .on('input', changeInput)
-	        .on('blur', changeInput);
+	    var url = "".concat(_impOsmUrls[key], "/retrieveComments?") + utilQsString(qParams);
 
-	    // update
-	    saveSection = saveSectionEnter
-	      .merge(saveSection)
-	        .call(qaSaveButtons);
+	    var cacheComments = function cacheComments(data) {
+	      // Assign directly for immediate use afterwards
+	      // comments are served newest to oldest
+	      item.comments = data.comments ? data.comments.reverse() : [];
 
-	    function changeInput() {
-	      var input = select(this);
-	      var val = input.property('value').trim();
+	      _this2.replaceItem(item);
+	    };
 
-	      if (val === _qaItem.comment) {
-	        val = undefined;
-	      }
+	    return d3_json(url).then(cacheComments).then(function () {
+	      return item;
+	    });
+	  },
+	  postUpdate: function postUpdate(d, callback) {
+	    if (!serviceOsm.authenticated()) {
+	      // Username required in payload
+	      return callback({
+	        message: 'Not Authenticated',
+	        status: -3
+	      }, d);
+	    }
 
-	      // store the unsaved comment with the issue itself
-	      _qaItem = _qaItem.update({ newComment: val });
+	    if (_cache$1.inflightPost[d.id]) {
+	      return callback({
+	        message: 'Error update already inflight',
+	        status: -2
+	      }, d);
+	    } // Payload can only be sent once username is established
 
-	      var qaService = services.keepRight;
-	      if (qaService) {
-	        qaService.replaceItem(_qaItem);  // update keepright cache
-	      }
 
-	      saveSection
-	        .call(qaSaveButtons);
-	    }
-	  }
+	    serviceOsm.userDetails(sendPayload.bind(this));
 
+	    function sendPayload(err, user) {
+	      var _this3 = this;
 
-	  function qaSaveButtons(selection) {
-	    var isSelected = (_qaItem && _qaItem.id === context.selectedErrorID());
-	    var buttonSection = selection.selectAll('.buttons')
-	      .data((isSelected ? [_qaItem] : []), function (d) { return d.status + d.id; });
+	      if (err) {
+	        return callback(err, d);
+	      }
 
-	    // exit
-	    buttonSection.exit()
-	      .remove();
+	      var key = d.issueKey;
+	      var url = "".concat(_impOsmUrls[key], "/comment");
+	      var payload = {
+	        username: user.display_name,
+	        targetIds: [d.identifier]
+	      };
 
-	    // enter
-	    var buttonEnter = buttonSection.enter()
-	      .append('div')
-	        .attr('class', 'buttons');
+	      if (d.newStatus) {
+	        payload.status = d.newStatus;
+	        payload.text = 'status changed';
+	      } // Comment take place of default text
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button comment-button action')
-	        .text(_t('QA.keepRight.save_comment'));
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button close-button action');
+	      if (d.newComment) {
+	        payload.text = d.newComment;
+	      }
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button ignore-button action');
+	      var controller = new AbortController();
+	      _cache$1.inflightPost[d.id] = controller;
+	      var options = {
+	        method: 'POST',
+	        signal: controller.signal,
+	        body: JSON.stringify(payload)
+	      };
+	      d3_json(url, options).then(function () {
+	        delete _cache$1.inflightPost[d.id]; // Just a comment, update error in cache
+
+	        if (!d.newStatus) {
+	          var now = new Date();
+	          var comments = d.comments ? d.comments : [];
+	          comments.push({
+	            username: payload.username,
+	            text: payload.text,
+	            timestamp: now.getTime() / 1000
+	          });
 
-	    // update
-	    buttonSection = buttonSection
-	      .merge(buttonEnter);
+	          _this3.replaceItem(d.update({
+	            comments: comments,
+	            newComment: undefined
+	          }));
+	        } else {
+	          _this3.removeItem(d);
 
-	    buttonSection.select('.comment-button')   // select and propagate data
-	      .attr('disabled', function (d) { return d.newComment ? null : true; })
-	      .on('click.comment', function(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var qaService = services.keepRight;
-	        if (qaService) {
-	          qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-	        }
-	      });
+	          if (d.newStatus === 'SOLVED') {
+	            // Keep track of the number of issues closed per type to tag the changeset
+	            if (!(d.issueKey in _cache$1.closed)) {
+	              _cache$1.closed[d.issueKey] = 0;
+	            }
 
-	    buttonSection.select('.close-button')   // select and propagate data
-	      .text(function (d) {
-	        var andComment = (d.newComment ? '_comment' : '');
-	        return _t(("QA.keepRight.close" + andComment));
-	      })
-	      .on('click.close', function(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var qaService = services.keepRight;
-	        if (qaService) {
-	          d.newStatus = 'ignore_t';   // ignore temporarily (item fixed)
-	          qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
+	            _cache$1.closed[d.issueKey] += 1;
+	          }
 	        }
-	      });
 
-	    buttonSection.select('.ignore-button')   // select and propagate data
-	      .text(function (d) {
-	        var andComment = (d.newComment ? '_comment' : '');
-	        return _t(("QA.keepRight.ignore" + andComment));
-	      })
-	      .on('click.ignore', function(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var qaService = services.keepRight;
-	        if (qaService) {
-	          d.newStatus = 'ignore';   // ignore permanently (false positive)
-	          qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-	        }
+	        if (callback) callback(null, d);
+	      })["catch"](function (err) {
+	        delete _cache$1.inflightPost[d.id];
+	        if (callback) callback(err.message);
 	      });
-	  }
-
+	    }
+	  },
+	  // Get all cached QAItems covering the viewport
+	  getItems: function getItems(projection) {
+	    var viewport = projection.clipExtent();
+	    var min = [viewport[0][0], viewport[1][1]];
+	    var max = [viewport[1][0], viewport[0][1]];
+	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	    return _cache$1.rtree.search(bbox).map(function (d) {
+	      return d.data;
+	    });
+	  },
+	  // Get a QAItem from cache
 	  // NOTE: Don't change method name until UI v3 is merged
-	  keepRightEditor.error = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return keepRightEditor;
-	  };
-
-	  return utilRebind(keepRightEditor, dispatch$1, 'on');
-	}
-
-	function uiOsmoseDetails(context) {
-	  var _qaItem;
-
-	  function issueString(d, type) {
-	    if (!d) { return ''; }
+	  getError: function getError(id) {
+	    return _cache$1.data[id];
+	  },
+	  // get the name of the icon to display for this item
+	  getIcon: function getIcon(itemType) {
+	    return _impOsmData.icons[itemType];
+	  },
+	  // Replace a single QAItem in the cache
+	  replaceItem: function replaceItem(issue) {
+	    if (!(issue instanceof QAItem) || !issue.id) return;
+	    _cache$1.data[issue.id] = issue;
+	    updateRtree$2(encodeIssueRtree$1(issue), true); // true = replace
 
-	    // Issue strings are cached from Osmose API
-	    var s = services.osmose.getStrings(d.itemType);
-	    return (type in s) ? s[type] : '';
+	    return issue;
+	  },
+	  // Remove a single QAItem from the cache
+	  removeItem: function removeItem(issue) {
+	    if (!(issue instanceof QAItem) || !issue.id) return;
+	    delete _cache$1.data[issue.id];
+	    updateRtree$2(encodeIssueRtree$1(issue), false); // false = remove
+	  },
+	  // Used to populate `closed:improveosm:*` changeset tags
+	  getClosedCounts: function getClosedCounts() {
+	    return _cache$1.closed;
 	  }
+	};
 
+	var defaults$5 = {exports: {}};
 
-	  function osmoseDetails(selection) {
-	    var details = selection.selectAll('.error-details')
-	      .data(
-	        _qaItem ? [_qaItem] : [],
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
-
-	    details.exit()
-	      .remove();
+	function getDefaults$1() {
+	  return {
+	    baseUrl: null,
+	    breaks: false,
+	    gfm: true,
+	    headerIds: true,
+	    headerPrefix: '',
+	    highlight: null,
+	    langPrefix: 'language-',
+	    mangle: true,
+	    pedantic: false,
+	    renderer: null,
+	    sanitize: false,
+	    sanitizer: null,
+	    silent: false,
+	    smartLists: false,
+	    smartypants: false,
+	    tokenizer: null,
+	    walkTokens: null,
+	    xhtml: false
+	  };
+	}
 
-	    var detailsEnter = details.enter()
-	      .append('div')
-	        .attr('class', 'error-details qa-details-container');
+	function changeDefaults$1(newDefaults) {
+	  defaults$5.exports.defaults = newDefaults;
+	}
 
+	defaults$5.exports = {
+	  defaults: getDefaults$1(),
+	  getDefaults: getDefaults$1,
+	  changeDefaults: changeDefaults$1
+	};
 
-	    // Description
-	    if (issueString(_qaItem, 'detail')) {
-	      var div = detailsEnter
-	        .append('div')
-	          .attr('class', 'qa-details-subsection');
+	var escapeTest = /[&<>"']/;
+	var escapeReplace = /[&<>"']/g;
+	var escapeTestNoEncode = /[<>"']|&(?!#?\w+;)/;
+	var escapeReplaceNoEncode = /[<>"']|&(?!#?\w+;)/g;
+	var escapeReplacements = {
+	  '&': '&amp;',
+	  '<': '&lt;',
+	  '>': '&gt;',
+	  '"': '&quot;',
+	  "'": '&#39;'
+	};
 
-	      div
-	        .append('h4')
-	          .text(function () { return _t('QA.keepRight.detail_description'); });
+	var getEscapeReplacement = function getEscapeReplacement(ch) {
+	  return escapeReplacements[ch];
+	};
 
-	      div
-	        .append('p')
-	          .attr('class', 'qa-details-description-text')
-	          .html(function (d) { return issueString(d, 'detail'); })
-	        .selectAll('a')
-	          .attr('rel', 'noopener')
-	          .attr('target', '_blank');
+	function escape$3(html, encode) {
+	  if (encode) {
+	    if (escapeTest.test(html)) {
+	      return html.replace(escapeReplace, getEscapeReplacement);
 	    }
+	  } else {
+	    if (escapeTestNoEncode.test(html)) {
+	      return html.replace(escapeReplaceNoEncode, getEscapeReplacement);
+	    }
+	  }
 
-	    // Elements (populated later as data is requested)
-	    var detailsDiv = detailsEnter
-	      .append('div')
-	        .attr('class', 'qa-details-subsection');
-
-	    var elemsDiv = detailsEnter
-	      .append('div')
-	        .attr('class', 'qa-details-subsection');
+	  return html;
+	}
 
-	    // Suggested Fix (mustn't exist for every issue type)
-	    if (issueString(_qaItem, 'fix')) {
-	      var div$1 = detailsEnter
-	        .append('div')
-	          .attr('class', 'qa-details-subsection');
+	var unescapeTest = /&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/ig;
 
-	      div$1
-	        .append('h4')
-	          .text(function () { return _t('QA.osmose.fix_title'); });
+	function unescape$2(html) {
+	  // explicitly match decimal, hex, and named HTML entities
+	  return html.replace(unescapeTest, function (_, n) {
+	    n = n.toLowerCase();
+	    if (n === 'colon') return ':';
 
-	      div$1
-	        .append('p')
-	          .html(function (d) { return issueString(d, 'fix'); })
-	        .selectAll('a')
-	          .attr('rel', 'noopener')
-	          .attr('target', '_blank');
+	    if (n.charAt(0) === '#') {
+	      return n.charAt(1) === 'x' ? String.fromCharCode(parseInt(n.substring(2), 16)) : String.fromCharCode(+n.substring(1));
 	    }
 
-	    // Common Pitfalls (mustn't exist for every issue type)
-	    if (issueString(_qaItem, 'trap')) {
-	      var div$2 = detailsEnter
-	        .append('div')
-	          .attr('class', 'qa-details-subsection');
+	    return '';
+	  });
+	}
 
-	      div$2
-	        .append('h4')
-	          .text(function () { return _t('QA.osmose.trap_title'); });
+	var caret = /(^|[^\[])\^/g;
 
-	      div$2
-	        .append('p')
-	          .html(function (d) { return issueString(d, 'trap'); })
-	        .selectAll('a')
-	          .attr('rel', 'noopener')
-	          .attr('target', '_blank');
+	function edit$1(regex, opt) {
+	  regex = regex.source || regex;
+	  opt = opt || '';
+	  var obj = {
+	    replace: function replace(name, val) {
+	      val = val.source || val;
+	      val = val.replace(caret, '$1');
+	      regex = regex.replace(name, val);
+	      return obj;
+	    },
+	    getRegex: function getRegex() {
+	      return new RegExp(regex, opt);
 	    }
+	  };
+	  return obj;
+	}
 
-	    // Save current item to check if UI changed by time request resolves
-	    var thisItem = _qaItem;
-	    services.osmose.loadIssueDetail(_qaItem)
-	      .then(function (d) {
-	        // No details to add if there are no associated issue elements
-	        if (!d.elems || d.elems.length === 0) { return; }
-
-	        // Do nothing if UI has moved on by the time this resolves
-	        if (
-	          context.selectedErrorID() !== thisItem.id
-	          && context.container().selectAll((".qaItem.osmose.hover.itemId-" + (thisItem.id))).empty()
-	        ) { return; }
-
-	        // Things like keys and values are dynamically added to a subtitle string
-	        if (d.detail) {
-	          detailsDiv
-	            .append('h4')
-	              .text(function () { return _t('QA.osmose.detail_title'); });
-
-	          detailsDiv
-	            .append('p')
-	              .html(function (d) { return d.detail; })
-	            .selectAll('a')
-	              .attr('rel', 'noopener')
-	              .attr('target', '_blank');
-	        }
-
-	        // Create list of linked issue elements
-	        elemsDiv
-	          .append('h4')
-	            .text(function () { return _t('QA.osmose.elems_title'); });
-
-	        elemsDiv
-	          .append('ul').selectAll('li')
-	          .data(d.elems)
-	          .enter()
-	          .append('li')
-	          .append('a')
-	            .attr('class', 'error_entity_link')
-	            .text(function (d) { return d; })
-	            .each(function() {
-	              var link = select(this);
-	              var entityID = this.textContent;
-	              var entity = context.hasEntity(entityID);
-
-	              // Add click handler
-	              link
-	                .on('mouseenter', function () {
-	                  utilHighlightEntities([entityID], true, context);
-	                })
-	                .on('mouseleave', function () {
-	                  utilHighlightEntities([entityID], false, context);
-	                })
-	                .on('click', function () {
-	                  event.preventDefault();
-
-	                  utilHighlightEntities([entityID], false, context);
-
-	                  var osmlayer = context.layers().layer('osm');
-	                  if (!osmlayer.enabled()) {
-	                    osmlayer.enabled(true);
-	                  }
-
-	                  context.map().centerZoom(d.loc, 20);
-
-	                  if (entity) {
-	                    context.enter(modeSelect(context, [entityID]));
-	                  } else {
-	                    context.loadEntity(entityID, function () {
-	                      context.enter(modeSelect(context, [entityID]));
-	                    });
-	                  }
-	                });
+	var nonWordAndColonTest = /[^\w:]/g;
+	var originIndependentUrl = /^$|^[a-z][a-z0-9+.-]*:|^[?#]/i;
 
-	              // Replace with friendly name if possible
-	              // (The entity may not yet be loaded into the graph)
-	              if (entity) {
-	                var name = utilDisplayName(entity);  // try to use common name
+	function cleanUrl$1(sanitize, base, href) {
+	  if (sanitize) {
+	    var prot;
 
-	                if (!name) {
-	                  var preset = _mainPresetIndex.match(entity, context.graph());
-	                  name = preset && !preset.isFallback() && preset.name();  // fallback to preset name
-	                }
+	    try {
+	      prot = decodeURIComponent(unescape$2(href)).replace(nonWordAndColonTest, '').toLowerCase();
+	    } catch (e) {
+	      return null;
+	    }
 
-	                if (name) {
-	                  this.innerText = name;
-	                }
-	              }
-	            });
+	    if (prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0 || prot.indexOf('data:') === 0) {
+	      return null;
+	    }
+	  }
 
-	        // Don't hide entities related to this issue - #5880
-	        context.features().forceVisible(d.elems);
-	        context.map().pan([0,0]);  // trigger a redraw
-	      })
-	      .catch(function (err) {
-	        console.log(err); // eslint-disable-line no-console
-	      });
+	  if (base && !originIndependentUrl.test(href)) {
+	    href = resolveUrl$2(base, href);
 	  }
 
+	  try {
+	    href = encodeURI(href).replace(/%25/g, '%');
+	  } catch (e) {
+	    return null;
+	  }
 
-	  osmoseDetails.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return osmoseDetails;
-	  };
+	  return href;
+	}
 
+	var baseUrls = {};
+	var justDomain = /^[^:]+:\/*[^/]*$/;
+	var protocol = /^([^:]+:)[\s\S]*$/;
+	var domain = /^([^:]+:\/*[^/]*)[\s\S]*$/;
 
-	  return osmoseDetails;
-	}
+	function resolveUrl$2(base, href) {
+	  if (!baseUrls[' ' + base]) {
+	    // we can ignore everything in base after the last slash of its path component,
+	    // but we might need to add _that_
+	    // https://tools.ietf.org/html/rfc3986#section-3
+	    if (justDomain.test(base)) {
+	      baseUrls[' ' + base] = base + '/';
+	    } else {
+	      baseUrls[' ' + base] = rtrim$1(base, '/', true);
+	    }
+	  }
 
-	function uiOsmoseHeader() {
-	  var _qaItem;
+	  base = baseUrls[' ' + base];
+	  var relativeBase = base.indexOf(':') === -1;
 
-	  function issueTitle(d) {
-	    var unknown = _t('inspector.unknown');
+	  if (href.substring(0, 2) === '//') {
+	    if (relativeBase) {
+	      return href;
+	    }
 
-	    if (!d) { return unknown; }
+	    return base.replace(protocol, '$1') + href;
+	  } else if (href.charAt(0) === '/') {
+	    if (relativeBase) {
+	      return href;
+	    }
 
-	    // Issue titles supplied by Osmose
-	    var s = services.osmose.getStrings(d.itemType);
-	    return ('title' in s) ? s.title : unknown;
+	    return base.replace(domain, '$1') + href;
+	  } else {
+	    return base + href;
 	  }
+	}
 
-	  function osmoseHeader(selection) {
-	    var header = selection.selectAll('.qa-header')
-	      .data(
-	        (_qaItem ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
+	var noopTest$1 = {
+	  exec: function noopTest() {}
+	};
 
-	    header.exit()
-	      .remove();
-
-	    var headerEnter = header.enter()
-	      .append('div')
-	        .attr('class', 'qa-header');
-
-	    var svgEnter = headerEnter
-	      .append('div')
-	        .attr('class', 'qa-header-icon')
-	        .classed('new', function (d) { return d.id < 0; })
-	      .append('svg')
-	        .attr('width', '20px')
-	        .attr('height', '30px')
-	        .attr('viewbox', '0 0 20 30')
-	        .attr('class', function (d) { return ("preset-icon-28 qaItem " + (d.service) + " itemId-" + (d.id) + " itemType-" + (d.itemType)); });
-
-	    svgEnter
-	      .append('polygon')
-	        .attr('fill', function (d) { return services.osmose.getColor(d.item); })
-	        .attr('class', 'qaItem-fill')
-	        .attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
-
-	    svgEnter
-	      .append('use')
-	        .attr('class', 'icon-annotation')
-	        .attr('width', '13px')
-	        .attr('height', '13px')
-	        .attr('transform', 'translate(3.5, 5)')
-	        .attr('xlink:href', function (d) {
-	          var picon = d.icon;
-
-	          if (!picon) {
-	            return '';
-	          } else {
-	            var isMaki = /^maki-/.test(picon);
-	            return ("#" + picon + (isMaki ? '-11' : ''));
-	          }
-	        });
+	function merge$2(obj) {
+	  var i = 1,
+	      target,
+	      key;
 
-	    headerEnter
-	      .append('div')
-	        .attr('class', 'qa-header-label')
-	        .text(issueTitle);
-	  }
+	  for (; i < arguments.length; i++) {
+	    target = arguments[i];
 
-	  osmoseHeader.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return osmoseHeader;
-	  };
+	    for (key in target) {
+	      if (Object.prototype.hasOwnProperty.call(target, key)) {
+	        obj[key] = target[key];
+	      }
+	    }
+	  }
 
-	  return osmoseHeader;
+	  return obj;
 	}
 
-	function uiViewOnOsmose() {
-	  var _qaItem;
+	function splitCells$1(tableRow, count) {
+	  // ensure that every cell-delimiting pipe has a space
+	  // before it to distinguish it from an escaped pipe
+	  var row = tableRow.replace(/\|/g, function (match, offset, str) {
+	    var escaped = false,
+	        curr = offset;
 
-	  function viewOnOsmose(selection) {
-	    var url;
-	    if (services.osmose && (_qaItem instanceof QAItem)) {
-	      url = services.osmose.itemURL(_qaItem);
+	    while (--curr >= 0 && str[curr] === '\\') {
+	      escaped = !escaped;
 	    }
 
-	    var link = selection.selectAll('.view-on-osmose')
-	      .data(url ? [url] : []);
-
-	    // exit
-	    link.exit()
-	      .remove();
-
-	    // enter
-	    var linkEnter = link.enter()
-	      .append('a')
-	        .attr('class', 'view-on-osmose')
-	        .attr('target', '_blank')
-	        .attr('rel', 'noopener') // security measure
-	        .attr('href', function (d) { return d; })
-	        .call(svgIcon('#iD-icon-out-link', 'inline'));
+	    if (escaped) {
+	      // odd number of slashes means | is escaped
+	      // so we leave it alone
+	      return '|';
+	    } else {
+	      // add space before unescaped |
+	      return ' |';
+	    }
+	  }),
+	      cells = row.split(/ \|/);
+	  var i = 0;
 
-	    linkEnter
-	      .append('span')
-	        .text(_t('inspector.view_on_osmose'));
+	  if (cells.length > count) {
+	    cells.splice(count);
+	  } else {
+	    while (cells.length < count) {
+	      cells.push('');
+	    }
 	  }
 
-	  viewOnOsmose.what = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return viewOnOsmose;
-	  };
-
-	  return viewOnOsmose;
-	}
+	  for (; i < cells.length; i++) {
+	    // leading or trailing whitespace is ignored per the gfm spec
+	    cells[i] = cells[i].trim().replace(/\\\|/g, '|');
+	  }
 
-	function uiOsmoseEditor(context) {
-	  var dispatch$1 = dispatch('change');
-	  var qaDetails = uiOsmoseDetails(context);
-	  var qaHeader = uiOsmoseHeader();
+	  return cells;
+	} // Remove trailing 'c's. Equivalent to str.replace(/c*$/, '').
+	// /c*$/ is vulnerable to REDOS.
+	// invert: Remove suffix of non-c chars instead. Default falsey.
 
-	  var _qaItem;
 
-	  function osmoseEditor(selection) {
+	function rtrim$1(str, c, invert) {
+	  var l = str.length;
 
-	    var header = selection.selectAll('.header')
-	      .data([0]);
+	  if (l === 0) {
+	    return '';
+	  } // Length of suffix matching the invert condition.
 
-	    var headerEnter = header.enter()
-	      .append('div')
-	        .attr('class', 'header fillL');
 
-	    headerEnter
-	      .append('button')
-	        .attr('class', 'close')
-	        .on('click', function () { return context.enter(modeBrowse(context)); })
-	        .call(svgIcon('#iD-icon-close'));
+	  var suffLen = 0; // Step left until we fail to match the invert condition.
 
-	    headerEnter
-	      .append('h3')
-	        .text(_t('QA.osmose.title'));
+	  while (suffLen < l) {
+	    var currChar = str.charAt(l - suffLen - 1);
 
-	    var body = selection.selectAll('.body')
-	      .data([0]);
+	    if (currChar === c && !invert) {
+	      suffLen++;
+	    } else if (currChar !== c && invert) {
+	      suffLen++;
+	    } else {
+	      break;
+	    }
+	  }
 
-	    body = body.enter()
-	        .append('div')
-	        .attr('class', 'body')
-	      .merge(body);
+	  return str.substr(0, l - suffLen);
+	}
 
-	    var editor = body.selectAll('.qa-editor')
-	      .data([0]);
+	function findClosingBracket$1(str, b) {
+	  if (str.indexOf(b[1]) === -1) {
+	    return -1;
+	  }
 
-	    editor.enter()
-	      .append('div')
-	        .attr('class', 'modal-section qa-editor')
-	      .merge(editor)
-	        .call(qaHeader.issue(_qaItem))
-	        .call(qaDetails.issue(_qaItem))
-	        .call(osmoseSaveSection);
+	  var l = str.length;
+	  var level = 0,
+	      i = 0;
 
-	    var footer = selection.selectAll('.footer')
-	      .data([0]);
+	  for (; i < l; i++) {
+	    if (str[i] === '\\') {
+	      i++;
+	    } else if (str[i] === b[0]) {
+	      level++;
+	    } else if (str[i] === b[1]) {
+	      level--;
 
-	    footer.enter()
-	      .append('div')
-	      .attr('class', 'footer')
-	      .merge(footer)
-	      .call(uiViewOnOsmose().what(_qaItem));
+	      if (level < 0) {
+	        return i;
+	      }
+	    }
 	  }
 
-	  function osmoseSaveSection(selection) {
-	    var isSelected = (_qaItem && _qaItem.id === context.selectedErrorID());
-	    var isShown = (_qaItem && isSelected);
-	    var saveSection = selection.selectAll('.qa-save')
-	      .data(
-	        (isShown ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
+	  return -1;
+	}
 
-	    // exit
-	    saveSection.exit()
-	      .remove();
+	function checkSanitizeDeprecation$1(opt) {
+	  if (opt && opt.sanitize && !opt.silent) {
+	    console.warn('marked(): sanitize and sanitizer parameters are deprecated since version 0.7.0, should not be used and will be removed in the future. Read more here: https://marked.js.org/#/USING_ADVANCED.md#options');
+	  }
+	} // copied from https://stackoverflow.com/a/5450113/806777
 
-	    // enter
-	    var saveSectionEnter = saveSection.enter()
-	      .append('div')
-	        .attr('class', 'qa-save save-section cf');
 
-	    // update
-	    saveSection = saveSectionEnter
-	      .merge(saveSection)
-	        .call(qaSaveButtons);
+	function repeatString$1(pattern, count) {
+	  if (count < 1) {
+	    return '';
 	  }
 
-	  function qaSaveButtons(selection) {
-	    var isSelected = (_qaItem && _qaItem.id === context.selectedErrorID());
-	    var buttonSection = selection.selectAll('.buttons')
-	      .data((isSelected ? [_qaItem] : []), function (d) { return d.status + d.id; });
-
-	    // exit
-	    buttonSection.exit()
-	      .remove();
+	  var result = '';
 
-	    // enter
-	    var buttonEnter = buttonSection.enter()
-	      .append('div')
-	        .attr('class', 'buttons');
+	  while (count > 1) {
+	    if (count & 1) {
+	      result += pattern;
+	    }
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button close-button action');
+	    count >>= 1;
+	    pattern += pattern;
+	  }
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button ignore-button action');
+	  return result + pattern;
+	}
 
-	    // update
-	    buttonSection = buttonSection
-	      .merge(buttonEnter);
+	var helpers = {
+	  escape: escape$3,
+	  unescape: unescape$2,
+	  edit: edit$1,
+	  cleanUrl: cleanUrl$1,
+	  resolveUrl: resolveUrl$2,
+	  noopTest: noopTest$1,
+	  merge: merge$2,
+	  splitCells: splitCells$1,
+	  rtrim: rtrim$1,
+	  findClosingBracket: findClosingBracket$1,
+	  checkSanitizeDeprecation: checkSanitizeDeprecation$1,
+	  repeatString: repeatString$1
+	};
+
+	var defaults$4 = defaults$5.exports.defaults;
+	var rtrim = helpers.rtrim,
+	    splitCells = helpers.splitCells,
+	    _escape = helpers.escape,
+	    findClosingBracket = helpers.findClosingBracket;
 
-	    buttonSection.select('.close-button')
-	      .text(function () { return _t('QA.keepRight.close'); })
-	      .on('click.close', function(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var qaService = services.osmose;
-	        if (qaService) {
-	          d.newStatus = 'done';
-	          qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-	        }
-	      });
+	function outputLink(cap, link, raw) {
+	  var href = link.href;
+	  var title = link.title ? _escape(link.title) : null;
+	  var text = cap[1].replace(/\\([\[\]])/g, '$1');
 
-	    buttonSection.select('.ignore-button')
-	      .text(function () { return _t('QA.keepRight.ignore'); })
-	      .on('click.ignore', function(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var qaService = services.osmose;
-	        if (qaService) {
-	          d.newStatus = 'false';
-	          qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-	        }
-	      });
+	  if (cap[0].charAt(0) !== '!') {
+	    return {
+	      type: 'link',
+	      raw: raw,
+	      href: href,
+	      title: title,
+	      text: text
+	    };
+	  } else {
+	    return {
+	      type: 'image',
+	      raw: raw,
+	      href: href,
+	      title: title,
+	      text: _escape(text)
+	    };
 	  }
-
-	  // NOTE: Don't change method name until UI v3 is merged
-	  osmoseEditor.error = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return osmoseEditor;
-	  };
-
-	  return utilRebind(osmoseEditor, dispatch$1, 'on');
 	}
 
-	// NOTE: Don't change name of this until UI v3 is merged
-	function modeSelectError(context, selectedErrorID, selectedErrorService) {
-	    var mode = {
-	        id: 'select-error',
-	        button: 'browse'
-	    };
+	function indentCodeCompensation(raw, text) {
+	  var matchIndentToCode = raw.match(/^(\s+)(?:```)/);
 
-	    var keybinding = utilKeybinding('select-error');
-
-	    var errorService = services[selectedErrorService];
-	    var errorEditor;
-	    switch (selectedErrorService) {
-	        case 'improveOSM':
-	            errorEditor = uiImproveOsmEditor(context)
-	            .on('change', function() {
-	                context.map().pan([0,0]);  // trigger a redraw
-	                var error = checkSelectedID();
-	                if (!error) { return; }
-	                context.ui().sidebar
-	                    .show(errorEditor.error(error));
-	            });
-	            break;
-	        case 'keepRight':
-	            errorEditor = uiKeepRightEditor(context)
-	            .on('change', function() {
-	                context.map().pan([0,0]);  // trigger a redraw
-	                var error = checkSelectedID();
-	                if (!error) { return; }
-	                context.ui().sidebar
-	                    .show(errorEditor.error(error));
-	            });
-	            break;
-	        case 'osmose':
-	            errorEditor = uiOsmoseEditor(context)
-	            .on('change', function() {
-	                context.map().pan([0,0]);  // trigger a redraw
-	                var error = checkSelectedID();
-	                if (!error) { return; }
-	                context.ui().sidebar
-	                    .show(errorEditor.error(error));
-	            });
-	            break;
-	    }
+	  if (matchIndentToCode === null) {
+	    return text;
+	  }
 
+	  var indentToCode = matchIndentToCode[1];
+	  return text.split('\n').map(function (node) {
+	    var matchIndentInNode = node.match(/^\s+/);
 
-	    var behaviors = [
-	        behaviorBreathe(),
-	        behaviorHover(context),
-	        behaviorSelect(context),
-	        behaviorLasso(context),
-	        modeDragNode(context).behavior,
-	        modeDragNote(context).behavior
-	    ];
+	    if (matchIndentInNode === null) {
+	      return node;
+	    }
 
+	    var _matchIndentInNode = _slicedToArray(matchIndentInNode, 1),
+	        indentInNode = _matchIndentInNode[0];
 
-	    function checkSelectedID() {
-	        if (!errorService) { return; }
-	        var error = errorService.getError(selectedErrorID);
-	        if (!error) {
-	            context.enter(modeBrowse(context));
-	        }
-	        return error;
+	    if (indentInNode.length >= indentToCode.length) {
+	      return node.slice(indentToCode.length);
 	    }
 
+	    return node;
+	  }).join('\n');
+	}
+	/**
+	 * Tokenizer
+	 */
 
-	    mode.zoomToSelected = function() {
-	        if (!errorService) { return; }
-	        var error = errorService.getError(selectedErrorID);
-	        if (error) {
-	            context.map().centerZoomEase(error.loc, 20);
-	        }
-	    };
 
+	var Tokenizer_1 = /*#__PURE__*/function () {
+	  function Tokenizer(options) {
+	    _classCallCheck$1(this, Tokenizer);
 
-	    mode.enter = function() {
-	        var error = checkSelectedID();
-	        if (!error) { return; }
+	    this.options = options || defaults$4;
+	  }
 
-	        behaviors.forEach(context.install);
-	        keybinding
-	            .on(_t('inspector.zoom_to.key'), mode.zoomToSelected)
-	            .on('⎋', esc, true);
+	  _createClass$1(Tokenizer, [{
+	    key: "space",
+	    value: function space(src) {
+	      var cap = this.rules.block.newline.exec(src);
 
-	        select(document)
-	            .call(keybinding);
+	      if (cap) {
+	        if (cap[0].length > 1) {
+	          return {
+	            type: 'space',
+	            raw: cap[0]
+	          };
+	        }
 
-	        selectError();
+	        return {
+	          raw: '\n'
+	        };
+	      }
+	    }
+	  }, {
+	    key: "code",
+	    value: function code(src) {
+	      var cap = this.rules.block.code.exec(src);
 
-	        var sidebar = context.ui().sidebar;
-	        sidebar.show(errorEditor.error(error));
+	      if (cap) {
+	        var text = cap[0].replace(/^ {1,4}/gm, '');
+	        return {
+	          type: 'code',
+	          raw: cap[0],
+	          codeBlockStyle: 'indented',
+	          text: !this.options.pedantic ? rtrim(text, '\n') : text
+	        };
+	      }
+	    }
+	  }, {
+	    key: "fences",
+	    value: function fences(src) {
+	      var cap = this.rules.block.fences.exec(src);
 
-	        context.map()
-	            .on('drawn.select-error', selectError);
+	      if (cap) {
+	        var raw = cap[0];
+	        var text = indentCodeCompensation(raw, cap[3] || '');
+	        return {
+	          type: 'code',
+	          raw: raw,
+	          lang: cap[2] ? cap[2].trim() : cap[2],
+	          text: text
+	        };
+	      }
+	    }
+	  }, {
+	    key: "heading",
+	    value: function heading(src) {
+	      var cap = this.rules.block.heading.exec(src);
 
+	      if (cap) {
+	        var text = cap[2].trim(); // remove trailing #s
 
-	        // class the error as selected, or return to browse mode if the error is gone
-	        function selectError(drawn) {
-	            if (!checkSelectedID()) { return; }
+	        if (/#$/.test(text)) {
+	          var trimmed = rtrim(text, '#');
 
-	            var selection = context.surface()
-	                .selectAll('.itemId-' + selectedErrorID + '.' + selectedErrorService);
+	          if (this.options.pedantic) {
+	            text = trimmed.trim();
+	          } else if (!trimmed || / $/.test(trimmed)) {
+	            // CommonMark requires space before trailing #s
+	            text = trimmed.trim();
+	          }
+	        }
 
-	            if (selection.empty()) {
-	                // Return to browse mode if selected DOM elements have
-	                // disappeared because the user moved them out of view..
-	                var source = event && event.type === 'zoom' && event.sourceEvent;
-	                if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
-	                    context.enter(modeBrowse(context));
-	                }
+	        return {
+	          type: 'heading',
+	          raw: cap[0],
+	          depth: cap[1].length,
+	          text: text
+	        };
+	      }
+	    }
+	  }, {
+	    key: "nptable",
+	    value: function nptable(src) {
+	      var cap = this.rules.block.nptable.exec(src);
+
+	      if (cap) {
+	        var item = {
+	          type: 'table',
+	          header: splitCells(cap[1].replace(/^ *| *\| *$/g, '')),
+	          align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
+	          cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : [],
+	          raw: cap[0]
+	        };
 
+	        if (item.header.length === item.align.length) {
+	          var l = item.align.length;
+	          var i;
+
+	          for (i = 0; i < l; i++) {
+	            if (/^ *-+: *$/.test(item.align[i])) {
+	              item.align[i] = 'right';
+	            } else if (/^ *:-+: *$/.test(item.align[i])) {
+	              item.align[i] = 'center';
+	            } else if (/^ *:-+ *$/.test(item.align[i])) {
+	              item.align[i] = 'left';
 	            } else {
-	                selection
-	                    .classed('selected', true);
-
-	                context.selectedErrorID(selectedErrorID);
+	              item.align[i] = null;
 	            }
-	        }
-
-	        function esc() {
-	            if (context.container().select('.combobox').size()) { return; }
-	            context.enter(modeBrowse(context));
-	        }
-	    };
-
+	          }
 
-	    mode.exit = function() {
-	        behaviors.forEach(context.uninstall);
+	          l = item.cells.length;
 
-	        select(document)
-	            .call(keybinding.unbind);
+	          for (i = 0; i < l; i++) {
+	            item.cells[i] = splitCells(item.cells[i], item.header.length);
+	          }
 
-	        context.surface()
-	            .selectAll('.qaItem.selected')
-	            .classed('selected hover', false);
+	          return item;
+	        }
+	      }
+	    }
+	  }, {
+	    key: "hr",
+	    value: function hr(src) {
+	      var cap = this.rules.block.hr.exec(src);
 
-	        context.map()
-	            .on('drawn.select-error', null);
+	      if (cap) {
+	        return {
+	          type: 'hr',
+	          raw: cap[0]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "blockquote",
+	    value: function blockquote(src) {
+	      var cap = this.rules.block.blockquote.exec(src);
 
-	        context.ui().sidebar
-	            .hide();
+	      if (cap) {
+	        var text = cap[0].replace(/^ *> ?/gm, '');
+	        return {
+	          type: 'blockquote',
+	          raw: cap[0],
+	          text: text
+	        };
+	      }
+	    }
+	  }, {
+	    key: "list",
+	    value: function list(src) {
+	      var cap = this.rules.block.list.exec(src);
+
+	      if (cap) {
+	        var raw = cap[0];
+	        var bull = cap[2];
+	        var isordered = bull.length > 1;
+	        var list = {
+	          type: 'list',
+	          raw: raw,
+	          ordered: isordered,
+	          start: isordered ? +bull.slice(0, -1) : '',
+	          loose: false,
+	          items: []
+	        }; // Get each top-level item.
+
+	        var itemMatch = cap[0].match(this.rules.block.item);
+	        var next = false,
+	            item,
+	            space,
+	            bcurr,
+	            bnext,
+	            addBack,
+	            loose,
+	            istask,
+	            ischecked,
+	            endMatch;
+	        var l = itemMatch.length;
+	        bcurr = this.rules.block.listItemStart.exec(itemMatch[0]);
+
+	        for (var i = 0; i < l; i++) {
+	          item = itemMatch[i];
+	          raw = item;
+
+	          if (!this.options.pedantic) {
+	            // Determine if current item contains the end of the list
+	            endMatch = item.match(new RegExp('\\n\\s*\\n {0,' + (bcurr[0].length - 1) + '}\\S'));
+
+	            if (endMatch) {
+	              addBack = item.length - endMatch.index + itemMatch.slice(i + 1).join('\n').length;
+	              list.raw = list.raw.substring(0, list.raw.length - addBack);
+	              item = item.substring(0, endMatch.index);
+	              raw = item;
+	              l = i + 1;
+	            }
+	          } // Determine whether the next list item belongs here.
+	          // Backpedal if it does not belong in this list.
+
+
+	          if (i !== l - 1) {
+	            bnext = this.rules.block.listItemStart.exec(itemMatch[i + 1]);
+
+	            if (!this.options.pedantic ? bnext[1].length >= bcurr[0].length || bnext[1].length > 3 : bnext[1].length > bcurr[1].length) {
+	              // nested list or continuation
+	              itemMatch.splice(i, 2, itemMatch[i] + (!this.options.pedantic && bnext[1].length < bcurr[0].length && !itemMatch[i].match(/\n$/) ? '' : '\n') + itemMatch[i + 1]);
+	              i--;
+	              l--;
+	              continue;
+	            } else if ( // different bullet style
+	            !this.options.pedantic || this.options.smartLists ? bnext[2][bnext[2].length - 1] !== bull[bull.length - 1] : isordered === (bnext[2].length === 1)) {
+	              addBack = itemMatch.slice(i + 1).join('\n').length;
+	              list.raw = list.raw.substring(0, list.raw.length - addBack);
+	              i = l - 1;
+	            }
+
+	            bcurr = bnext;
+	          } // Remove the list item's bullet
+	          // so it is seen as the next token.
+
+
+	          space = item.length;
+	          item = item.replace(/^ *([*+-]|\d+[.)]) ?/, ''); // Outdent whatever the
+	          // list item contains. Hacky.
+
+	          if (~item.indexOf('\n ')) {
+	            space -= item.length;
+	            item = !this.options.pedantic ? item.replace(new RegExp('^ {1,' + space + '}', 'gm'), '') : item.replace(/^ {1,4}/gm, '');
+	          } // trim item newlines at end
+
+
+	          item = rtrim(item, '\n');
+
+	          if (i !== l - 1) {
+	            raw = raw + '\n';
+	          } // Determine whether item is loose or not.
+	          // Use: /(^|\n)(?! )[^\n]+\n\n(?!\s*$)/
+	          // for discount behavior.
+
+
+	          loose = next || /\n\n(?!\s*$)/.test(raw);
+
+	          if (i !== l - 1) {
+	            next = raw.slice(-2) === '\n\n';
+	            if (!loose) loose = next;
+	          }
 
-	        context.selectedErrorID(null);
-	        context.features().forceVisible([]);
-	    };
+	          if (loose) {
+	            list.loose = true;
+	          } // Check for task list items
 
 
-	    return mode;
-	}
+	          if (this.options.gfm) {
+	            istask = /^\[[ xX]\] /.test(item);
+	            ischecked = undefined;
 
-	function behaviorSelect(context) {
-	    var _tolerancePx = 4; // see also behaviorDrag
-	    var _lastMouseEvent = null;
-	    var _showMenu = false;
-	    var _downPointers = {};
-	    var _longPressTimeout = null;
-	    var _lastInteractionType = null;
-	    // the id of the down pointer that's enabling multiselection while down
-	    var _multiselectionPointerId = null;
+	            if (istask) {
+	              ischecked = item[1] !== ' ';
+	              item = item.replace(/^\[[ xX]\] +/, '');
+	            }
+	          }
 
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	          list.items.push({
+	            type: 'list_item',
+	            raw: raw,
+	            task: istask,
+	            checked: ischecked,
+	            loose: loose,
+	            text: item
+	          });
+	        }
 
+	        return list;
+	      }
+	    }
+	  }, {
+	    key: "html",
+	    value: function html(src) {
+	      var cap = this.rules.block.html.exec(src);
 
-	    function keydown() {
+	      if (cap) {
+	        return {
+	          type: this.options.sanitize ? 'paragraph' : 'html',
+	          raw: cap[0],
+	          pre: !this.options.sanitizer && (cap[1] === 'pre' || cap[1] === 'script' || cap[1] === 'style'),
+	          text: this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "def",
+	    value: function def(src) {
+	      var cap = this.rules.block.def.exec(src);
 
-	        if (event.keyCode === 32) {
-	            // don't react to spacebar events during text input
-	            var activeNode = document.activeElement;
-	            if (activeNode && new Set(['INPUT', 'TEXTAREA']).has(activeNode.nodeName)) { return; }
-	        }
+	      if (cap) {
+	        if (cap[3]) cap[3] = cap[3].substring(1, cap[3].length - 1);
+	        var tag = cap[1].toLowerCase().replace(/\s+/g, ' ');
+	        return {
+	          type: 'def',
+	          tag: tag,
+	          raw: cap[0],
+	          href: cap[2],
+	          title: cap[3]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "table",
+	    value: function table(src) {
+	      var cap = this.rules.block.table.exec(src);
+
+	      if (cap) {
+	        var item = {
+	          type: 'table',
+	          header: splitCells(cap[1].replace(/^ *| *\| *$/g, '')),
+	          align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
+	          cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : []
+	        };
 
-	        if (event.keyCode === 93 ||  // context menu key
-	            event.keyCode === 32) {  // spacebar
-	            event.preventDefault();
-	        }
+	        if (item.header.length === item.align.length) {
+	          item.raw = cap[0];
+	          var l = item.align.length;
+	          var i;
+
+	          for (i = 0; i < l; i++) {
+	            if (/^ *-+: *$/.test(item.align[i])) {
+	              item.align[i] = 'right';
+	            } else if (/^ *:-+: *$/.test(item.align[i])) {
+	              item.align[i] = 'center';
+	            } else if (/^ *:-+ *$/.test(item.align[i])) {
+	              item.align[i] = 'left';
+	            } else {
+	              item.align[i] = null;
+	            }
+	          }
 
-	        if (event.repeat) { return; } // ignore repeated events for held keys
+	          l = item.cells.length;
 
-	        // if any key is pressed the user is probably doing something other than long-pressing
-	        cancelLongPress();
+	          for (i = 0; i < l; i++) {
+	            item.cells[i] = splitCells(item.cells[i].replace(/^ *\| *| *\| *$/g, ''), item.header.length);
+	          }
 
-	        if (event.shiftKey) {
-	            context.surface()
-	                .classed('behavior-multiselect', true);
+	          return item;
 	        }
+	      }
+	    }
+	  }, {
+	    key: "lheading",
+	    value: function lheading(src) {
+	      var cap = this.rules.block.lheading.exec(src);
 
-	        if (event.keyCode === 32) {  // spacebar
-	            if (!_downPointers.spacebar && _lastMouseEvent) {
-	                cancelLongPress();
-	                _longPressTimeout = window.setTimeout(didLongPress, 500, 'spacebar', 'spacebar');
+	      if (cap) {
+	        return {
+	          type: 'heading',
+	          raw: cap[0],
+	          depth: cap[2].charAt(0) === '=' ? 1 : 2,
+	          text: cap[1]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "paragraph",
+	    value: function paragraph(src) {
+	      var cap = this.rules.block.paragraph.exec(src);
 
-	                _downPointers.spacebar = {
-	                    firstEvent: _lastMouseEvent,
-	                    lastEvent: _lastMouseEvent
-	                };
-	            }
-	        }
+	      if (cap) {
+	        return {
+	          type: 'paragraph',
+	          raw: cap[0],
+	          text: cap[1].charAt(cap[1].length - 1) === '\n' ? cap[1].slice(0, -1) : cap[1]
+	        };
+	      }
 	    }
+	  }, {
+	    key: "text",
+	    value: function text(src) {
+	      var cap = this.rules.block.text.exec(src);
 
+	      if (cap) {
+	        return {
+	          type: 'text',
+	          raw: cap[0],
+	          text: cap[0]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "escape",
+	    value: function escape(src) {
+	      var cap = this.rules.inline.escape.exec(src);
 
-	    function keyup() {
-	        cancelLongPress();
+	      if (cap) {
+	        return {
+	          type: 'escape',
+	          raw: cap[0],
+	          text: _escape(cap[1])
+	        };
+	      }
+	    }
+	  }, {
+	    key: "tag",
+	    value: function tag(src, inLink, inRawBlock) {
+	      var cap = this.rules.inline.tag.exec(src);
 
-	        if (!event.shiftKey) {
-	            context.surface()
-	                .classed('behavior-multiselect', false);
+	      if (cap) {
+	        if (!inLink && /^<a /i.test(cap[0])) {
+	          inLink = true;
+	        } else if (inLink && /^<\/a>/i.test(cap[0])) {
+	          inLink = false;
 	        }
 
-	        if (event.keyCode === 93) {  // context menu key
-	            event.preventDefault();
-	            _lastInteractionType = 'menukey';
-	            contextmenu();
-	        } else if (event.keyCode === 32) {  // spacebar
-	            var pointer = _downPointers.spacebar;
-	            if (pointer) {
-	                delete _downPointers.spacebar;
-
-	                if (pointer.done) { return; }
-
-	                event.preventDefault();
-	                _lastInteractionType = 'spacebar';
-	                click(pointer.firstEvent, pointer.lastEvent, 'spacebar');
-	            }
+	        if (!inRawBlock && /^<(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
+	          inRawBlock = true;
+	        } else if (inRawBlock && /^<\/(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
+	          inRawBlock = false;
 	        }
+
+	        return {
+	          type: this.options.sanitize ? 'text' : 'html',
+	          raw: cap[0],
+	          inLink: inLink,
+	          inRawBlock: inRawBlock,
+	          text: this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0]
+	        };
+	      }
 	    }
+	  }, {
+	    key: "link",
+	    value: function link(src) {
+	      var cap = this.rules.inline.link.exec(src);
 
+	      if (cap) {
+	        var trimmedUrl = cap[2].trim();
 
-	    function pointerdown() {
-	        var id = (event.pointerId || 'mouse').toString();
+	        if (!this.options.pedantic && /^</.test(trimmedUrl)) {
+	          // commonmark requires matching angle brackets
+	          if (!/>$/.test(trimmedUrl)) {
+	            return;
+	          } // ending angle bracket cannot be escaped
 
-	        cancelLongPress();
 
-	        if (event.buttons && event.buttons !== 1) { return; }
+	          var rtrimSlash = rtrim(trimmedUrl.slice(0, -1), '\\');
 
-	        context.ui().closeEditMenu();
+	          if ((trimmedUrl.length - rtrimSlash.length) % 2 === 0) {
+	            return;
+	          }
+	        } else {
+	          // find closing parenthesis
+	          var lastParenIndex = findClosingBracket(cap[2], '()');
+
+	          if (lastParenIndex > -1) {
+	            var start = cap[0].indexOf('!') === 0 ? 5 : 4;
+	            var linkLen = start + cap[1].length + lastParenIndex;
+	            cap[2] = cap[2].substring(0, lastParenIndex);
+	            cap[0] = cap[0].substring(0, linkLen).trim();
+	            cap[3] = '';
+	          }
+	        }
 
-	        _longPressTimeout = window.setTimeout(didLongPress, 500, id, 'longdown-' + (event.pointerType || 'mouse'));
+	        var href = cap[2];
+	        var title = '';
 
-	        _downPointers[id] = {
-	            firstEvent: event,
-	            lastEvent: event
-	        };
-	    }
+	        if (this.options.pedantic) {
+	          // split pedantic href and title
+	          var link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);
 
+	          if (link) {
+	            href = link[1];
+	            title = link[3];
+	          }
+	        } else {
+	          title = cap[3] ? cap[3].slice(1, -1) : '';
+	        }
 
-	    function didLongPress(id, interactionType) {
-	        var pointer = _downPointers[id];
-	        if (!pointer) { return; }
+	        href = href.trim();
 
-	        for (var i in _downPointers) {
-	            // don't allow this or any currently down pointer to trigger another click
-	            _downPointers[i].done = true;
+	        if (/^</.test(href)) {
+	          if (this.options.pedantic && !/>$/.test(trimmedUrl)) {
+	            // pedantic allows starting angle bracket without ending angle bracket
+	            href = href.slice(1);
+	          } else {
+	            href = href.slice(1, -1);
+	          }
 	        }
 
-	        // treat long presses like right-clicks
-	        _longPressTimeout = null;
-	        _lastInteractionType = interactionType;
-	        _showMenu = true;
-
-	        click(pointer.firstEvent, pointer.lastEvent, id);
+	        return outputLink(cap, {
+	          href: href ? href.replace(this.rules.inline._escapes, '$1') : href,
+	          title: title ? title.replace(this.rules.inline._escapes, '$1') : title
+	        }, cap[0]);
+	      }
 	    }
+	  }, {
+	    key: "reflink",
+	    value: function reflink(src, links) {
+	      var cap;
 
+	      if ((cap = this.rules.inline.reflink.exec(src)) || (cap = this.rules.inline.nolink.exec(src))) {
+	        var link = (cap[2] || cap[1]).replace(/\s+/g, ' ');
+	        link = links[link.toLowerCase()];
 
-	    function pointermove() {
-	        var id = (event.pointerId || 'mouse').toString();
-	        if (_downPointers[id]) {
-	            _downPointers[id].lastEvent = event;
-	        }
-	        if (!event.pointerType || event.pointerType === 'mouse') {
-	            _lastMouseEvent = event;
-	            if (_downPointers.spacebar) {
-	                _downPointers.spacebar.lastEvent = event;
-	            }
+	        if (!link || !link.href) {
+	          var text = cap[0].charAt(0);
+	          return {
+	            type: 'text',
+	            raw: text,
+	            text: text
+	          };
 	        }
-	    }
 
+	        return outputLink(cap, link, cap[0]);
+	      }
+	    }
+	  }, {
+	    key: "emStrong",
+	    value: function emStrong(src, maskedSrc) {
+	      var prevChar = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : '';
+	      var match = this.rules.inline.emStrong.lDelim.exec(src);
+	      if (!match) return; // _ can't be between two alphanumerics. \p{L}\p{N} includes non-english alphabet/numbers as well
+
+	      if (match[3] && prevChar.match(/(?:[0-9A-Za-z\xAA\xB2\xB3\xB5\xB9\xBA\xBC-\xBE\xC0-\xD6\xD8-\xF6\xF8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0370-\u0374\u0376\u0377\u037A-\u037D\u037F\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u048A-\u052F\u0531-\u0556\u0559\u0560-\u0588\u05D0-\u05EA\u05EF-\u05F2\u0620-\u064A\u0660-\u0669\u066E\u066F\u0671-\u06D3\u06D5\u06E5\u06E6\u06EE-\u06FC\u06FF\u0710\u0712-\u072F\u074D-\u07A5\u07B1\u07C0-\u07EA\u07F4\u07F5\u07FA\u0800-\u0815\u081A\u0824\u0828\u0840-\u0858\u0860-\u086A\u08A0-\u08B4\u08B6-\u08C7\u0904-\u0939\u093D\u0950\u0958-\u0961\u0966-\u096F\u0971-\u0980\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BD\u09CE\u09DC\u09DD\u09DF-\u09E1\u09E6-\u09F1\u09F4-\u09F9\u09FC\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A59-\u0A5C\u0A5E\u0A66-\u0A6F\u0A72-\u0A74\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABD\u0AD0\u0AE0\u0AE1\u0AE6-\u0AEF\u0AF9\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3D\u0B5C\u0B5D\u0B5F-\u0B61\u0B66-\u0B6F\u0B71-\u0B77\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BD0\u0BE6-\u0BF2\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C39\u0C3D\u0C58-\u0C5A\u0C60\u0C61\u0C66-\u0C6F\u0C78-\u0C7E\u0C80\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBD\u0CDE\u0CE0\u0CE1\u0CE6-\u0CEF\u0CF1\u0CF2\u0D04-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D\u0D4E\u0D54-\u0D56\u0D58-\u0D61\u0D66-\u0D78\u0D7A-\u0D7F\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0DE6-\u0DEF\u0E01-\u0E30\u0E32\u0E33\u0E40-\u0E46\u0E50-\u0E59\u0E81\u0E82\u0E84\u0E86-\u0E8A\u0E8C-\u0EA3\u0EA5\u0EA7-\u0EB0\u0EB2\u0EB3\u0EBD\u0EC0-\u0EC4\u0EC6\u0ED0-\u0ED9\u0EDC-\u0EDF\u0F00\u0F20-\u0F33\u0F40-\u0F47\u0F49-\u0F6C\u0F88-\u0F8C\u1000-\u102A\u103F-\u1049\u1050-\u1055\u105A-\u105D\u1061\u1065\u1066\u106E-\u1070\u1075-\u1081\u108E\u1090-\u1099\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310\u1312-\u1315\u1318-\u135A\u1369-\u137C\u1380-\u138F\u13A0-\u13F5\u13F8-\u13FD\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u16EE-\u16F8\u1700-\u170C\u170E-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176C\u176E-\u1770\u1780-\u17B3\u17D7\u17DC\u17E0-\u17E9\u17F0-\u17F9\u1810-\u1819\u1820-\u1878\u1880-\u1884\u1887-\u18A8\u18AA\u18B0-\u18F5\u1900-\u191E\u1946-\u196D\u1970-\u1974\u1980-\u19AB\u19B0-\u19C9\u19D0-\u19DA\u1A00-\u1A16\u1A20-\u1A54\u1A80-\u1A89\u1A90-\u1A99\u1AA7\u1B05-\u1B33\u1B45-\u1B4B\u1B50-\u1B59\u1B83-\u1BA0\u1BAE-\u1BE5\u1C00-\u1C23\u1C40-\u1C49\u1C4D-\u1C7D\u1C80-\u1C88\u1C90-\u1CBA\u1CBD-\u1CBF\u1CE9-\u1CEC\u1CEE-\u1CF3\u1CF5\u1CF6\u1CFA\u1D00-\u1DBF\u1E00-\u1F15\u1F18-\u1F1D\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u2070\u2071\u2074-\u2079\u207F-\u2089\u2090-\u209C\u2102\u2107\u210A-\u2113\u2115\u2119-\u211D\u2124\u2126\u2128\u212A-\u212D\u212F-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2150-\u2189\u2460-\u249B\u24EA-\u24FF\u2776-\u2793\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CEE\u2CF2\u2CF3\u2CFD\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D80-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2E2F\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303C\u3041-\u3096\u309D-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312F\u3131-\u318E\u3192-\u3195\u31A0-\u31BF\u31F0-\u31FF\u3220-\u3229\u3248-\u324F\u3251-\u325F\u3280-\u3289\u32B1-\u32BF\u3400-\u4DBF\u4E00-\u9FFC\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA62B\uA640-\uA66E\uA67F-\uA69D\uA6A0-\uA6EF\uA717-\uA71F\uA722-\uA788\uA78B-\uA7BF\uA7C2-\uA7CA\uA7F5-\uA801\uA803-\uA805\uA807-\uA80A\uA80C-\uA822\uA830-\uA835\uA840-\uA873\uA882-\uA8B3\uA8D0-\uA8D9\uA8F2-\uA8F7\uA8FB\uA8FD\uA8FE\uA900-\uA925\uA930-\uA946\uA960-\uA97C\uA984-\uA9B2\uA9CF-\uA9D9\uA9E0-\uA9E4\uA9E6-\uA9FE\uAA00-\uAA28\uAA40-\uAA42\uAA44-\uAA4B\uAA50-\uAA59\uAA60-\uAA76\uAA7A\uAA7E-\uAAAF\uAAB1\uAAB5\uAAB6\uAAB9-\uAABD\uAAC0\uAAC2\uAADB-\uAADD\uAAE0-\uAAEA\uAAF2-\uAAF4\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uAB30-\uAB5A\uAB5C-\uAB69\uAB70-\uABE2\uABF0-\uABF9\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D\uFB1F-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE70-\uFE74\uFE76-\uFEFC\uFF10-\uFF19\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]|\uD800[\uDC00-\uDC0B\uDC0D-\uDC26\uDC28-\uDC3A\uDC3C\uDC3D\uDC3F-\uDC4D\uDC50-\uDC5D\uDC80-\uDCFA\uDD07-\uDD33\uDD40-\uDD78\uDD8A\uDD8B\uDE80-\uDE9C\uDEA0-\uDED0\uDEE1-\uDEFB\uDF00-\uDF23\uDF2D-\uDF4A\uDF50-\uDF75\uDF80-\uDF9D\uDFA0-\uDFC3\uDFC8-\uDFCF\uDFD1-\uDFD5]|\uD801[\uDC00-\uDC9D\uDCA0-\uDCA9\uDCB0-\uDCD3\uDCD8-\uDCFB\uDD00-\uDD27\uDD30-\uDD63\uDE00-\uDF36\uDF40-\uDF55\uDF60-\uDF67]|\uD802[\uDC00-\uDC05\uDC08\uDC0A-\uDC35\uDC37\uDC38\uDC3C\uDC3F-\uDC55\uDC58-\uDC76\uDC79-\uDC9E\uDCA7-\uDCAF\uDCE0-\uDCF2\uDCF4\uDCF5\uDCFB-\uDD1B\uDD20-\uDD39\uDD80-\uDDB7\uDDBC-\uDDCF\uDDD2-\uDE00\uDE10-\uDE13\uDE15-\uDE17\uDE19-\uDE35\uDE40-\uDE48\uDE60-\uDE7E\uDE80-\uDE9F\uDEC0-\uDEC7\uDEC9-\uDEE4\uDEEB-\uDEEF\uDF00-\uDF35\uDF40-\uDF55\uDF58-\uDF72\uDF78-\uDF91\uDFA9-\uDFAF]|\uD803[\uDC00-\uDC48\uDC80-\uDCB2\uDCC0-\uDCF2\uDCFA-\uDD23\uDD30-\uDD39\uDE60-\uDE7E\uDE80-\uDEA9\uDEB0\uDEB1\uDF00-\uDF27\uDF30-\uDF45\uDF51-\uDF54\uDFB0-\uDFCB\uDFE0-\uDFF6]|\uD804[\uDC03-\uDC37\uDC52-\uDC6F\uDC83-\uDCAF\uDCD0-\uDCE8\uDCF0-\uDCF9\uDD03-\uDD26\uDD36-\uDD3F\uDD44\uDD47\uDD50-\uDD72\uDD76\uDD83-\uDDB2\uDDC1-\uDDC4\uDDD0-\uDDDA\uDDDC\uDDE1-\uDDF4\uDE00-\uDE11\uDE13-\uDE2B\uDE80-\uDE86\uDE88\uDE8A-\uDE8D\uDE8F-\uDE9D\uDE9F-\uDEA8\uDEB0-\uDEDE\uDEF0-\uDEF9\uDF05-\uDF0C\uDF0F\uDF10\uDF13-\uDF28\uDF2A-\uDF30\uDF32\uDF33\uDF35-\uDF39\uDF3D\uDF50\uDF5D-\uDF61]|\uD805[\uDC00-\uDC34\uDC47-\uDC4A\uDC50-\uDC59\uDC5F-\uDC61\uDC80-\uDCAF\uDCC4\uDCC5\uDCC7\uDCD0-\uDCD9\uDD80-\uDDAE\uDDD8-\uDDDB\uDE00-\uDE2F\uDE44\uDE50-\uDE59\uDE80-\uDEAA\uDEB8\uDEC0-\uDEC9\uDF00-\uDF1A\uDF30-\uDF3B]|\uD806[\uDC00-\uDC2B\uDCA0-\uDCF2\uDCFF-\uDD06\uDD09\uDD0C-\uDD13\uDD15\uDD16\uDD18-\uDD2F\uDD3F\uDD41\uDD50-\uDD59\uDDA0-\uDDA7\uDDAA-\uDDD0\uDDE1\uDDE3\uDE00\uDE0B-\uDE32\uDE3A\uDE50\uDE5C-\uDE89\uDE9D\uDEC0-\uDEF8]|\uD807[\uDC00-\uDC08\uDC0A-\uDC2E\uDC40\uDC50-\uDC6C\uDC72-\uDC8F\uDD00-\uDD06\uDD08\uDD09\uDD0B-\uDD30\uDD46\uDD50-\uDD59\uDD60-\uDD65\uDD67\uDD68\uDD6A-\uDD89\uDD98\uDDA0-\uDDA9\uDEE0-\uDEF2\uDFB0\uDFC0-\uDFD4]|\uD808[\uDC00-\uDF99]|\uD809[\uDC00-\uDC6E\uDC80-\uDD43]|[\uD80C\uD81C-\uD820\uD822\uD840-\uD868\uD86A-\uD86C\uD86F-\uD872\uD874-\uD879\uD880-\uD883][\uDC00-\uDFFF]|\uD80D[\uDC00-\uDC2E]|\uD811[\uDC00-\uDE46]|\uD81A[\uDC00-\uDE38\uDE40-\uDE5E\uDE60-\uDE69\uDED0-\uDEED\uDF00-\uDF2F\uDF40-\uDF43\uDF50-\uDF59\uDF5B-\uDF61\uDF63-\uDF77\uDF7D-\uDF8F]|\uD81B[\uDE40-\uDE96\uDF00-\uDF4A\uDF50\uDF93-\uDF9F\uDFE0\uDFE1\uDFE3]|\uD821[\uDC00-\uDFF7]|\uD823[\uDC00-\uDCD5\uDD00-\uDD08]|\uD82C[\uDC00-\uDD1E\uDD50-\uDD52\uDD64-\uDD67\uDD70-\uDEFB]|\uD82F[\uDC00-\uDC6A\uDC70-\uDC7C\uDC80-\uDC88\uDC90-\uDC99]|\uD834[\uDEE0-\uDEF3\uDF60-\uDF78]|\uD835[\uDC00-\uDC54\uDC56-\uDC9C\uDC9E\uDC9F\uDCA2\uDCA5\uDCA6\uDCA9-\uDCAC\uDCAE-\uDCB9\uDCBB\uDCBD-\uDCC3\uDCC5-\uDD05\uDD07-\uDD0A\uDD0D-\uDD14\uDD16-\uDD1C\uDD1E-\uDD39\uDD3B-\uDD3E\uDD40-\uDD44\uDD46\uDD4A-\uDD50\uDD52-\uDEA5\uDEA8-\uDEC0\uDEC2-\uDEDA\uDEDC-\uDEFA\uDEFC-\uDF14\uDF16-\uDF34\uDF36-\uDF4E\uDF50-\uDF6E\uDF70-\uDF88\uDF8A-\uDFA8\uDFAA-\uDFC2\uDFC4-\uDFCB\uDFCE-\uDFFF]|\uD838[\uDD00-\uDD2C\uDD37-\uDD3D\uDD40-\uDD49\uDD4E\uDEC0-\uDEEB\uDEF0-\uDEF9]|\uD83A[\uDC00-\uDCC4\uDCC7-\uDCCF\uDD00-\uDD43\uDD4B\uDD50-\uDD59]|\uD83B[\uDC71-\uDCAB\uDCAD-\uDCAF\uDCB1-\uDCB4\uDD01-\uDD2D\uDD2F-\uDD3D\uDE00-\uDE03\uDE05-\uDE1F\uDE21\uDE22\uDE24\uDE27\uDE29-\uDE32\uDE34-\uDE37\uDE39\uDE3B\uDE42\uDE47\uDE49\uDE4B\uDE4D-\uDE4F\uDE51\uDE52\uDE54\uDE57\uDE59\uDE5B\uDE5D\uDE5F\uDE61\uDE62\uDE64\uDE67-\uDE6A\uDE6C-\uDE72\uDE74-\uDE77\uDE79-\uDE7C\uDE7E\uDE80-\uDE89\uDE8B-\uDE9B\uDEA1-\uDEA3\uDEA5-\uDEA9\uDEAB-\uDEBB]|\uD83C[\uDD00-\uDD0C]|\uD83E[\uDFF0-\uDFF9]|\uD869[\uDC00-\uDEDD\uDF00-\uDFFF]|\uD86D[\uDC00-\uDF34\uDF40-\uDFFF]|\uD86E[\uDC00-\uDC1D\uDC20-\uDFFF]|\uD873[\uDC00-\uDEA1\uDEB0-\uDFFF]|\uD87A[\uDC00-\uDFE0]|\uD87E[\uDC00-\uDE1D]|\uD884[\uDC00-\uDF4A])/)) return;
+	      var nextChar = match[1] || match[2] || '';
+
+	      if (!nextChar || nextChar && (prevChar === '' || this.rules.inline.punctuation.exec(prevChar))) {
+	        var lLength = match[0].length - 1;
+	        var rDelim,
+	            rLength,
+	            delimTotal = lLength,
+	            midDelimTotal = 0;
+	        var endReg = match[0][0] === '*' ? this.rules.inline.emStrong.rDelimAst : this.rules.inline.emStrong.rDelimUnd;
+	        endReg.lastIndex = 0; // Clip maskedSrc to same section of string as src (move to lexer?)
+
+	        maskedSrc = maskedSrc.slice(-1 * src.length + lLength);
+
+	        while ((match = endReg.exec(maskedSrc)) != null) {
+	          rDelim = match[1] || match[2] || match[3] || match[4] || match[5] || match[6];
+	          if (!rDelim) continue; // skip single * in __abc*abc__
+
+	          rLength = rDelim.length;
+
+	          if (match[3] || match[4]) {
+	            // found another Left Delim
+	            delimTotal += rLength;
+	            continue;
+	          } else if (match[5] || match[6]) {
+	            // either Left or Right Delim
+	            if (lLength % 3 && !((lLength + rLength) % 3)) {
+	              midDelimTotal += rLength;
+	              continue; // CommonMark Emphasis Rules 9-10
+	            }
+	          }
 
-	    function pointerup() {
-	        var id = (event.pointerId || 'mouse').toString();
-	        var pointer = _downPointers[id];
-	        if (!pointer) { return; }
+	          delimTotal -= rLength;
+	          if (delimTotal > 0) continue; // Haven't found enough closing delimiters
+	          // Remove extra characters. *a*** -> *a*
 
-	        delete _downPointers[id];
+	          rLength = Math.min(rLength, rLength + delimTotal + midDelimTotal); // Create `em` if smallest delimiter has odd char count. *a***
 
-	        if (_multiselectionPointerId === id) {
-	            _multiselectionPointerId = null;
-	        }
+	          if (Math.min(lLength, rLength) % 2) {
+	            return {
+	              type: 'em',
+	              raw: src.slice(0, lLength + match.index + rLength + 1),
+	              text: src.slice(1, lLength + match.index + rLength)
+	            };
+	          } // Create 'strong' if smallest delimiter has even char count. **a***
 
-	        if (pointer.done) { return; }
 
-	        click(pointer.firstEvent, event, id);
+	          return {
+	            type: 'strong',
+	            raw: src.slice(0, lLength + match.index + rLength + 1),
+	            text: src.slice(2, lLength + match.index + rLength - 1)
+	          };
+	        }
+	      }
 	    }
+	  }, {
+	    key: "codespan",
+	    value: function codespan(src) {
+	      var cap = this.rules.inline.code.exec(src);
 
+	      if (cap) {
+	        var text = cap[2].replace(/\n/g, ' ');
+	        var hasNonSpaceChars = /[^ ]/.test(text);
+	        var hasSpaceCharsOnBothEnds = /^ /.test(text) && / $/.test(text);
 
-	    function pointercancel() {
-	        var id = (event.pointerId || 'mouse').toString();
-	        if (!_downPointers[id]) { return; }
+	        if (hasNonSpaceChars && hasSpaceCharsOnBothEnds) {
+	          text = text.substring(1, text.length - 1);
+	        }
 
-	        delete _downPointers[id];
+	        text = _escape(text, true);
+	        return {
+	          type: 'codespan',
+	          raw: cap[0],
+	          text: text
+	        };
+	      }
+	    }
+	  }, {
+	    key: "br",
+	    value: function br(src) {
+	      var cap = this.rules.inline.br.exec(src);
 
-	        if (_multiselectionPointerId === id) {
-	            _multiselectionPointerId = null;
-	        }
+	      if (cap) {
+	        return {
+	          type: 'br',
+	          raw: cap[0]
+	        };
+	      }
 	    }
+	  }, {
+	    key: "del",
+	    value: function del(src) {
+	      var cap = this.rules.inline.del.exec(src);
 
+	      if (cap) {
+	        return {
+	          type: 'del',
+	          raw: cap[0],
+	          text: cap[2]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "autolink",
+	    value: function autolink(src, mangle) {
+	      var cap = this.rules.inline.autolink.exec(src);
 
-	    function contextmenu() {
-	        var e = event;
-	        e.preventDefault();
+	      if (cap) {
+	        var text, href;
 
-	        if (!+e.clientX && !+e.clientY) {
-	            if (_lastMouseEvent) {
-	                e.sourceEvent = _lastMouseEvent;
-	            } else {
-	                return;
-	            }
+	        if (cap[2] === '@') {
+	          text = _escape(this.options.mangle ? mangle(cap[1]) : cap[1]);
+	          href = 'mailto:' + text;
 	        } else {
-	            _lastMouseEvent = event;
-	            _lastInteractionType = 'rightclick';
+	          text = _escape(cap[1]);
+	          href = text;
 	        }
 
-	        _showMenu = true;
-	        click(event, event);
+	        return {
+	          type: 'link',
+	          raw: cap[0],
+	          text: text,
+	          href: href,
+	          tokens: [{
+	            type: 'text',
+	            raw: text,
+	            text: text
+	          }]
+	        };
+	      }
 	    }
+	  }, {
+	    key: "url",
+	    value: function url(src, mangle) {
+	      var cap;
 
+	      if (cap = this.rules.inline.url.exec(src)) {
+	        var text, href;
 
-	    function click(firstEvent, lastEvent, pointerId) {
-	        cancelLongPress();
-
-	        var mapNode = context.container().select('.main-map').node();
+	        if (cap[2] === '@') {
+	          text = _escape(this.options.mangle ? mangle(cap[0]) : cap[0]);
+	          href = 'mailto:' + text;
+	        } else {
+	          // do extended autolink path validation
+	          var prevCapZero;
 
-	        // Use the `main-map` coordinate system since the surface and supersurface
-	        // are transformed when drag-panning.
-	        var pointGetter = utilFastMouse(mapNode);
-	        var p1 = pointGetter(firstEvent);
-	        var p2 = pointGetter(lastEvent);
-	        var dist = geoVecLength(p1, p2);
+	          do {
+	            prevCapZero = cap[0];
+	            cap[0] = this.rules.inline._backpedal.exec(cap[0])[0];
+	          } while (prevCapZero !== cap[0]);
 
-	        if (dist > _tolerancePx ||
-	            !mapContains(lastEvent)) {
+	          text = _escape(cap[0]);
 
-	            resetProperties();
-	            return;
+	          if (cap[1] === 'www.') {
+	            href = 'http://' + text;
+	          } else {
+	            href = text;
+	          }
 	        }
 
-	        var targetDatum = lastEvent.target.__data__;
+	        return {
+	          type: 'link',
+	          raw: cap[0],
+	          text: text,
+	          href: href,
+	          tokens: [{
+	            type: 'text',
+	            raw: text,
+	            text: text
+	          }]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "inlineText",
+	    value: function inlineText(src, inRawBlock, smartypants) {
+	      var cap = this.rules.inline.text.exec(src);
 
-	        var multiselectEntityId;
+	      if (cap) {
+	        var text;
 
-	        if (!_multiselectionPointerId) {
-	            // If a different pointer than the one triggering this click is down on a
-	            // feature, treat this and all future clicks as multiselection until that
-	            // pointer is raised.
-	            var selectPointerInfo = pointerDownOnSelection(pointerId);
-	            if (selectPointerInfo) {
-	                _multiselectionPointerId = selectPointerInfo.pointerId;
-	                // if the other feature isn't selected yet, make sure we select it
-	                multiselectEntityId = !selectPointerInfo.selected && selectPointerInfo.entityId;
-	                _downPointers[selectPointerInfo.pointerId].done = true;
-	            }
+	        if (inRawBlock) {
+	          text = this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0];
+	        } else {
+	          text = _escape(this.options.smartypants ? smartypants(cap[0]) : cap[0]);
 	        }
 
-	        // support multiselect if data is already selected
-	        var isMultiselect = context.mode().id === 'select' && (
-	            // and shift key is down
-	            (event && event.shiftKey) ||
-	            // or we're lasso-selecting
-	            context.surface().select('.lasso').node() ||
-	            // or a pointer is down over a selected feature
-	            (_multiselectionPointerId && !multiselectEntityId)
-	        );
-
-	        processClick(targetDatum, isMultiselect, p2, multiselectEntityId);
+	        return {
+	          type: 'text',
+	          raw: cap[0],
+	          text: text
+	        };
+	      }
+	    }
+	  }]);
 
-	        function mapContains(event) {
-	            var rect = mapNode.getBoundingClientRect();
-	            return event.clientX >= rect.left &&
-	                event.clientX <= rect.right &&
-	                event.clientY >= rect.top &&
-	                event.clientY <= rect.bottom;
-	        }
+	  return Tokenizer;
+	}();
 
-	        function pointerDownOnSelection(skipPointerId) {
-	            var mode = context.mode();
-	            var selectedIDs = mode.id === 'select' ? mode.selectedIDs() : [];
-	            for (var pointerId in _downPointers) {
-	                if (pointerId === 'spacebar' || pointerId === skipPointerId) { continue; }
+	var noopTest = helpers.noopTest,
+	    edit = helpers.edit,
+	    merge$1 = helpers.merge;
+	/**
+	 * Block-Level Grammar
+	 */
 
-	                var pointerInfo = _downPointers[pointerId];
+	var block$1 = {
+	  newline: /^(?: *(?:\n|$))+/,
+	  code: /^( {4}[^\n]+(?:\n(?: *(?:\n|$))*)?)+/,
+	  fences: /^ {0,3}(`{3,}(?=[^`\n]*\n)|~{3,})([^\n]*)\n(?:|([\s\S]*?)\n)(?: {0,3}\1[~`]* *(?:\n+|$)|$)/,
+	  hr: /^ {0,3}((?:- *){3,}|(?:_ *){3,}|(?:\* *){3,})(?:\n+|$)/,
+	  heading: /^ {0,3}(#{1,6})(?=\s|$)(.*)(?:\n+|$)/,
+	  blockquote: /^( {0,3}> ?(paragraph|[^\n]*)(?:\n|$))+/,
+	  list: /^( {0,3})(bull) [\s\S]+?(?:hr|def|\n{2,}(?! )(?! {0,3}bull )\n*|\s*$)/,
+	  html: '^ {0,3}(?:' // optional indentation
+	  + '<(script|pre|style)[\\s>][\\s\\S]*?(?:</\\1>[^\\n]*\\n+|$)' // (1)
+	  + '|comment[^\\n]*(\\n+|$)' // (2)
+	  + '|<\\?[\\s\\S]*?(?:\\?>\\n*|$)' // (3)
+	  + '|<![A-Z][\\s\\S]*?(?:>\\n*|$)' // (4)
+	  + '|<!\\[CDATA\\[[\\s\\S]*?(?:\\]\\]>\\n*|$)' // (5)
+	  + '|</?(tag)(?: +|\\n|/?>)[\\s\\S]*?(?:(?:\\n *)+\\n|$)' // (6)
+	  + '|<(?!script|pre|style)([a-z][\\w-]*)(?:attribute)*? */?>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:(?:\\n *)+\\n|$)' // (7) open tag
+	  + '|</(?!script|pre|style)[a-z][\\w-]*\\s*>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:(?:\\n *)+\\n|$)' // (7) closing tag
+	  + ')',
+	  def: /^ {0,3}\[(label)\]: *\n? *<?([^\s>]+)>?(?:(?: +\n? *| *\n *)(title))? *(?:\n+|$)/,
+	  nptable: noopTest,
+	  table: noopTest,
+	  lheading: /^([^\n]+)\n {0,3}(=+|-+) *(?:\n+|$)/,
+	  // regex template, placeholders will be replaced according to different paragraph
+	  // interruption rules of commonmark and the original markdown spec:
+	  _paragraph: /^([^\n]+(?:\n(?!hr|heading|lheading|blockquote|fences|list|html| +\n)[^\n]+)*)/,
+	  text: /^[^\n]+/
+	};
+	block$1._label = /(?!\s*\])(?:\\[\[\]]|[^\[\]])+/;
+	block$1._title = /(?:"(?:\\"?|[^"\\])*"|'[^'\n]*(?:\n[^'\n]+)*\n?'|\([^()]*\))/;
+	block$1.def = edit(block$1.def).replace('label', block$1._label).replace('title', block$1._title).getRegex();
+	block$1.bullet = /(?:[*+-]|\d{1,9}[.)])/;
+	block$1.item = /^( *)(bull) ?[^\n]*(?:\n(?! *bull ?)[^\n]*)*/;
+	block$1.item = edit(block$1.item, 'gm').replace(/bull/g, block$1.bullet).getRegex();
+	block$1.listItemStart = edit(/^( *)(bull) */).replace('bull', block$1.bullet).getRegex();
+	block$1.list = edit(block$1.list).replace(/bull/g, block$1.bullet).replace('hr', '\\n+(?=\\1?(?:(?:- *){3,}|(?:_ *){3,}|(?:\\* *){3,})(?:\\n+|$))').replace('def', '\\n+(?=' + block$1.def.source + ')').getRegex();
+	block$1._tag = 'address|article|aside|base|basefont|blockquote|body|caption' + '|center|col|colgroup|dd|details|dialog|dir|div|dl|dt|fieldset|figcaption' + '|figure|footer|form|frame|frameset|h[1-6]|head|header|hr|html|iframe' + '|legend|li|link|main|menu|menuitem|meta|nav|noframes|ol|optgroup|option' + '|p|param|section|source|summary|table|tbody|td|tfoot|th|thead|title|tr' + '|track|ul';
+	block$1._comment = /<!--(?!-?>)[\s\S]*?(?:-->|$)/;
+	block$1.html = edit(block$1.html, 'i').replace('comment', block$1._comment).replace('tag', block$1._tag).replace('attribute', / +[a-zA-Z:_][\w.:-]*(?: *= *"[^"\n]*"| *= *'[^'\n]*'| *= *[^\s"'=<>`]+)?/).getRegex();
+	block$1.paragraph = edit(block$1._paragraph).replace('hr', block$1.hr).replace('heading', ' {0,3}#{1,6} ').replace('|lheading', '') // setex headings don't interrupt commonmark paragraphs
+	.replace('blockquote', ' {0,3}>').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
+	.replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block$1._tag) // pars can be interrupted by type (6) html blocks
+	.getRegex();
+	block$1.blockquote = edit(block$1.blockquote).replace('paragraph', block$1.paragraph).getRegex();
+	/**
+	 * Normal Block Grammar
+	 */
 
-	                var p1 = pointGetter(pointerInfo.firstEvent);
-	                var p2 = pointGetter(pointerInfo.lastEvent);
-	                if (geoVecLength(p1, p2) > _tolerancePx) { continue; }
+	block$1.normal = merge$1({}, block$1);
+	/**
+	 * GFM Block Grammar
+	 */
 
-	                var datum = pointerInfo.firstEvent.target.__data__;
-	                var entity = (datum && datum.properties && datum.properties.entity) || datum;
-	                if (context.graph().hasEntity(entity.id)) { return {
-	                    pointerId: pointerId,
-	                    entityId: entity.id,
-	                    selected: selectedIDs.indexOf(entity.id) !== -1
-	                }; }
-	            }
-	            return null;
-	        }
-	    }
+	block$1.gfm = merge$1({}, block$1.normal, {
+	  nptable: '^ *([^|\\n ].*\\|.*)\\n' // Header
+	  + ' {0,3}([-:]+ *\\|[-| :]*)' // Align
+	  + '(?:\\n((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)',
+	  // Cells
+	  table: '^ *\\|(.+)\\n' // Header
+	  + ' {0,3}\\|?( *[-:]+[-| :]*)' // Align
+	  + '(?:\\n *((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)' // Cells
 
+	});
+	block$1.gfm.nptable = edit(block$1.gfm.nptable).replace('hr', block$1.hr).replace('heading', ' {0,3}#{1,6} ').replace('blockquote', ' {0,3}>').replace('code', ' {4}[^\\n]').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
+	.replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block$1._tag) // tables can be interrupted by type (6) html blocks
+	.getRegex();
+	block$1.gfm.table = edit(block$1.gfm.table).replace('hr', block$1.hr).replace('heading', ' {0,3}#{1,6} ').replace('blockquote', ' {0,3}>').replace('code', ' {4}[^\\n]').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
+	.replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block$1._tag) // tables can be interrupted by type (6) html blocks
+	.getRegex();
+	/**
+	 * Pedantic grammar (original John Gruber's loose markdown specification)
+	 */
 
-	    function processClick(datum, isMultiselect, point, alsoSelectId) {
-	        var mode = context.mode();
-	        var showMenu = _showMenu;
-	        var interactionType = _lastInteractionType;
+	block$1.pedantic = merge$1({}, block$1.normal, {
+	  html: edit('^ *(?:comment *(?:\\n|\\s*$)' + '|<(tag)[\\s\\S]+?</\\1> *(?:\\n{2,}|\\s*$)' // closed tag
+	  + '|<tag(?:"[^"]*"|\'[^\']*\'|\\s[^\'"/>\\s]*)*?/?> *(?:\\n{2,}|\\s*$))').replace('comment', block$1._comment).replace(/tag/g, '(?!(?:' + 'a|em|strong|small|s|cite|q|dfn|abbr|data|time|code|var|samp|kbd|sub' + '|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo|span|br|wbr|ins|del|img)' + '\\b)\\w+(?!:|[^\\w\\s@]*@)\\b').getRegex(),
+	  def: /^ *\[([^\]]+)\]: *<?([^\s>]+)>?(?: +(["(][^\n]+[")]))? *(?:\n+|$)/,
+	  heading: /^(#{1,6})(.*)(?:\n+|$)/,
+	  fences: noopTest,
+	  // fences not supported
+	  paragraph: edit(block$1.normal._paragraph).replace('hr', block$1.hr).replace('heading', ' *#{1,6} *[^\n]').replace('lheading', block$1.lheading).replace('blockquote', ' {0,3}>').replace('|fences', '').replace('|list', '').replace('|html', '').getRegex()
+	});
+	/**
+	 * Inline-Level Grammar
+	 */
 
-	        var entity = datum && datum.properties && datum.properties.entity;
-	        if (entity) { datum = entity; }
+	var inline$1 = {
+	  escape: /^\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/,
+	  autolink: /^<(scheme:[^\s\x00-\x1f<>]*|email)>/,
+	  url: noopTest,
+	  tag: '^comment' + '|^</[a-zA-Z][\\w:-]*\\s*>' // self-closing tag
+	  + '|^<[a-zA-Z][\\w-]*(?:attribute)*?\\s*/?>' // open tag
+	  + '|^<\\?[\\s\\S]*?\\?>' // processing instruction, e.g. <?php ?>
+	  + '|^<![a-zA-Z]+\\s[\\s\\S]*?>' // declaration, e.g. <!DOCTYPE html>
+	  + '|^<!\\[CDATA\\[[\\s\\S]*?\\]\\]>',
+	  // CDATA section
+	  link: /^!?\[(label)\]\(\s*(href)(?:\s+(title))?\s*\)/,
+	  reflink: /^!?\[(label)\]\[(?!\s*\])((?:\\[\[\]]?|[^\[\]\\])+)\]/,
+	  nolink: /^!?\[(?!\s*\])((?:\[[^\[\]]*\]|\\[\[\]]|[^\[\]])*)\](?:\[\])?/,
+	  reflinkSearch: 'reflink|nolink(?!\\()',
+	  emStrong: {
+	    lDelim: /^(?:\*+(?:([punct_])|[^\s*]))|^_+(?:([punct*])|([^\s_]))/,
+	    //        (1) and (2) can only be a Right Delimiter. (3) and (4) can only be Left.  (5) and (6) can be either Left or Right.
+	    //        () Skip other delimiter (1) #***                   (2) a***#, a***                   (3) #***a, ***a                 (4) ***#              (5) #***#                 (6) a***a
+	    rDelimAst: /\_\_[^_*]*?\*[^_*]*?\_\_|[punct_](\*+)(?=[\s]|$)|[^punct*_\s](\*+)(?=[punct_\s]|$)|[punct_\s](\*+)(?=[^punct*_\s])|[\s](\*+)(?=[punct_])|[punct_](\*+)(?=[punct_])|[^punct*_\s](\*+)(?=[^punct*_\s])/,
+	    rDelimUnd: /\*\*[^_*]*?\_[^_*]*?\*\*|[punct*](\_+)(?=[\s]|$)|[^punct*_\s](\_+)(?=[punct*\s]|$)|[punct*\s](\_+)(?=[^punct*_\s])|[\s](\_+)(?=[punct*])|[punct*](\_+)(?=[punct*])/ // ^- Not allowed for _
 
-	        if (datum && datum.type === 'midpoint') {
-	            // treat targeting midpoints as if targeting the parent way
-	            datum = datum.parents[0];
-	        }
+	  },
+	  code: /^(`+)([^`]|[^`][\s\S]*?[^`])\1(?!`)/,
+	  br: /^( {2,}|\\)\n(?!\s*$)/,
+	  del: noopTest,
+	  text: /^(`+|[^`])(?:(?= {2,}\n)|[\s\S]*?(?:(?=[\\<!\[`*_]|\b_|$)|[^ ](?= {2,}\n)))/,
+	  punctuation: /^([\spunctuation])/
+	}; // list of punctuation marks from CommonMark spec
+	// without * and _ to handle the different emphasis markers * and _
+
+	inline$1._punctuation = '!"#$%&\'()+\\-.,/:;<=>?@\\[\\]`^{|}~';
+	inline$1.punctuation = edit(inline$1.punctuation).replace(/punctuation/g, inline$1._punctuation).getRegex(); // sequences em should skip over [title](link), `code`, <html>
+
+	inline$1.blockSkip = /\[[^\]]*?\]\([^\)]*?\)|`[^`]*?`|<[^>]*?>/g;
+	inline$1.escapedEmSt = /\\\*|\\_/g;
+	inline$1._comment = edit(block$1._comment).replace('(?:-->|$)', '-->').getRegex();
+	inline$1.emStrong.lDelim = edit(inline$1.emStrong.lDelim).replace(/punct/g, inline$1._punctuation).getRegex();
+	inline$1.emStrong.rDelimAst = edit(inline$1.emStrong.rDelimAst, 'g').replace(/punct/g, inline$1._punctuation).getRegex();
+	inline$1.emStrong.rDelimUnd = edit(inline$1.emStrong.rDelimUnd, 'g').replace(/punct/g, inline$1._punctuation).getRegex();
+	inline$1._escapes = /\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/g;
+	inline$1._scheme = /[a-zA-Z][a-zA-Z0-9+.-]{1,31}/;
+	inline$1._email = /[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+(@)[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+(?![-_])/;
+	inline$1.autolink = edit(inline$1.autolink).replace('scheme', inline$1._scheme).replace('email', inline$1._email).getRegex();
+	inline$1._attribute = /\s+[a-zA-Z:_][\w.:-]*(?:\s*=\s*"[^"]*"|\s*=\s*'[^']*'|\s*=\s*[^\s"'=<>`]+)?/;
+	inline$1.tag = edit(inline$1.tag).replace('comment', inline$1._comment).replace('attribute', inline$1._attribute).getRegex();
+	inline$1._label = /(?:\[(?:\\.|[^\[\]\\])*\]|\\.|`[^`]*`|[^\[\]\\`])*?/;
+	inline$1._href = /<(?:\\.|[^\n<>\\])+>|[^\s\x00-\x1f]*/;
+	inline$1._title = /"(?:\\"?|[^"\\])*"|'(?:\\'?|[^'\\])*'|\((?:\\\)?|[^)\\])*\)/;
+	inline$1.link = edit(inline$1.link).replace('label', inline$1._label).replace('href', inline$1._href).replace('title', inline$1._title).getRegex();
+	inline$1.reflink = edit(inline$1.reflink).replace('label', inline$1._label).getRegex();
+	inline$1.reflinkSearch = edit(inline$1.reflinkSearch, 'g').replace('reflink', inline$1.reflink).replace('nolink', inline$1.nolink).getRegex();
+	/**
+	 * Normal Inline Grammar
+	 */
 
-	        var newMode;
+	inline$1.normal = merge$1({}, inline$1);
+	/**
+	 * Pedantic Inline Grammar
+	 */
 
-	        if (datum instanceof osmEntity) {
-	            // targeting an entity
-	            var selectedIDs = context.selectedIDs();
-	            context.selectedNoteID(null);
-	            context.selectedErrorID(null);
-
-	            if (!isMultiselect) {
-	                // don't change the selection if we're toggling the menu atop a multiselection
-	                if (!showMenu ||
-	                    selectedIDs.length <= 1 ||
-	                    selectedIDs.indexOf(datum.id) === -1) {
-
-	                    if (alsoSelectId === datum.id) { alsoSelectId = null; }
-
-	                    selectedIDs = (alsoSelectId ? [alsoSelectId] : []).concat([datum.id]);
-	                    // always enter modeSelect even if the entity is already
-	                    // selected since listeners may expect `context.enter` events,
-	                    // e.g. in the walkthrough
-	                    newMode = mode.id === 'select' ? mode.selectedIDs(selectedIDs) : modeSelect(context, selectedIDs).selectBehavior(behavior);
-	                    context.enter(newMode);
-	                }
+	inline$1.pedantic = merge$1({}, inline$1.normal, {
+	  strong: {
+	    start: /^__|\*\*/,
+	    middle: /^__(?=\S)([\s\S]*?\S)__(?!_)|^\*\*(?=\S)([\s\S]*?\S)\*\*(?!\*)/,
+	    endAst: /\*\*(?!\*)/g,
+	    endUnd: /__(?!_)/g
+	  },
+	  em: {
+	    start: /^_|\*/,
+	    middle: /^()\*(?=\S)([\s\S]*?\S)\*(?!\*)|^_(?=\S)([\s\S]*?\S)_(?!_)/,
+	    endAst: /\*(?!\*)/g,
+	    endUnd: /_(?!_)/g
+	  },
+	  link: edit(/^!?\[(label)\]\((.*?)\)/).replace('label', inline$1._label).getRegex(),
+	  reflink: edit(/^!?\[(label)\]\s*\[([^\]]*)\]/).replace('label', inline$1._label).getRegex()
+	});
+	/**
+	 * GFM Inline Grammar
+	 */
 
-	            } else {
-	                if (selectedIDs.indexOf(datum.id) !== -1) {
-	                    // clicked entity is already in the selectedIDs list..
-	                    if (!showMenu) {
-	                        // deselect clicked entity, then reenter select mode or return to browse mode..
-	                        selectedIDs = selectedIDs.filter(function(id) { return id !== datum.id; });
-	                        newMode = selectedIDs.length ? mode.selectedIDs(selectedIDs) : modeBrowse(context).selectBehavior(behavior);
-	                        context.enter(newMode);
-	                    }
-	                } else {
-	                    // clicked entity is not in the selected list, add it..
-	                    selectedIDs = selectedIDs.concat([datum.id]);
-	                    newMode = mode.selectedIDs(selectedIDs);
-	                    context.enter(newMode);
-	                }
-	            }
+	inline$1.gfm = merge$1({}, inline$1.normal, {
+	  escape: edit(inline$1.escape).replace('])', '~|])').getRegex(),
+	  _extended_email: /[A-Za-z0-9._+-]+(@)[a-zA-Z0-9-_]+(?:\.[a-zA-Z0-9-_]*[a-zA-Z0-9])+(?![-_])/,
+	  url: /^((?:ftp|https?):\/\/|www\.)(?:[a-zA-Z0-9\-]+\.?)+[^\s<]*|^email/,
+	  _backpedal: /(?:[^?!.,:;*_~()&]+|\([^)]*\)|&(?![a-zA-Z0-9]+;$)|[?!.,:;*_~)]+(?!$))+/,
+	  del: /^(~~?)(?=[^\s~])([\s\S]*?[^\s~])\1(?=[^~]|$)/,
+	  text: /^([`~]+|[^`~])(?:(?= {2,}\n)|(?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@)|[\s\S]*?(?:(?=[\\<!\[`*~_]|\b_|https?:\/\/|ftp:\/\/|www\.|$)|[^ ](?= {2,}\n)|[^a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-](?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@)))/
+	});
+	inline$1.gfm.url = edit(inline$1.gfm.url, 'i').replace('email', inline$1.gfm._extended_email).getRegex();
+	/**
+	 * GFM + Line Breaks Inline Grammar
+	 */
 
-	        } else if (datum && datum.__featurehash__ && !isMultiselect) {
-	            // targeting custom data
-	            context
-	                .selectedNoteID(null)
-	                .enter(modeSelectData(context, datum));
+	inline$1.breaks = merge$1({}, inline$1.gfm, {
+	  br: edit(inline$1.br).replace('{2,}', '*').getRegex(),
+	  text: edit(inline$1.gfm.text).replace('\\b_', '\\b_| {2,}\\n').replace(/\{2,\}/g, '*').getRegex()
+	});
+	var rules = {
+	  block: block$1,
+	  inline: inline$1
+	};
 
-	        } else if (datum instanceof osmNote && !isMultiselect) {
-	            // targeting a note
-	            context
-	                .selectedNoteID(datum.id)
-	                .enter(modeSelectNote(context, datum.id));
+	var Tokenizer$1 = Tokenizer_1;
+	var defaults$3 = defaults$5.exports.defaults;
+	var block = rules.block,
+	    inline = rules.inline;
+	var repeatString = helpers.repeatString;
+	/**
+	 * smartypants text replacement
+	 */
 
-	        } else if (datum instanceof QAItem & !isMultiselect) {
-	            // targeting an external QA issue
-	            context
-	                .selectedErrorID(datum.id)
-	                .enter(modeSelectError(context, datum.id, datum.service));
+	function smartypants(text) {
+	  return text // em-dashes
+	  .replace(/---/g, "\u2014") // en-dashes
+	  .replace(/--/g, "\u2013") // opening singles
+	  .replace(/(^|[-\u2014/(\[{"\s])'/g, "$1\u2018") // closing singles & apostrophes
+	  .replace(/'/g, "\u2019") // opening doubles
+	  .replace(/(^|[-\u2014/(\[{\u2018\s])"/g, "$1\u201C") // closing doubles
+	  .replace(/"/g, "\u201D") // ellipses
+	  .replace(/\.{3}/g, "\u2026");
+	}
+	/**
+	 * mangle email addresses
+	 */
 
-	        } else {
-	            // targeting nothing
-	            context.selectedNoteID(null);
-	            context.selectedErrorID(null);
-	            if (!isMultiselect && mode.id !== 'browse') {
-	                context.enter(modeBrowse(context));
-	            }
-	        }
 
-	        context.ui().closeEditMenu();
+	function mangle(text) {
+	  var out = '',
+	      i,
+	      ch;
+	  var l = text.length;
 
-	        // always request to show the edit menu in case the mode needs it
-	        if (showMenu) { context.ui().showEditMenu(point, interactionType); }
+	  for (i = 0; i < l; i++) {
+	    ch = text.charCodeAt(i);
 
-	        resetProperties();
+	    if (Math.random() > 0.5) {
+	      ch = 'x' + ch.toString(16);
 	    }
 
+	    out += '&#' + ch + ';';
+	  }
+
+	  return out;
+	}
+	/**
+	 * Block Lexer
+	 */
 
-	    function cancelLongPress() {
-	        if (_longPressTimeout) { window.clearTimeout(_longPressTimeout); }
-	        _longPressTimeout = null;
-	    }
 
+	var Lexer_1 = /*#__PURE__*/function () {
+	  function Lexer(options) {
+	    _classCallCheck$1(this, Lexer);
 
-	    function resetProperties() {
-	        cancelLongPress();
-	        _showMenu = false;
-	        _lastInteractionType = null;
-	        // don't reset _lastMouseEvent since it might still be useful
-	    }
-
-
-	    function behavior(selection) {
-	        resetProperties();
-	        _lastMouseEvent = context.map().lastPointerEvent();
-
-	        select(window)
-	            .on('keydown.select', keydown)
-	            .on('keyup.select', keyup)
-	            .on(_pointerPrefix + 'move.select', pointermove, true)
-	            .on(_pointerPrefix + 'up.select', pointerup, true)
-	            .on('pointercancel.select', pointercancel, true)
-	            .on('contextmenu.select-window', function() {
-	                // Edge and IE really like to show the contextmenu on the
-	                // menubar when user presses a keyboard menu button
-	                // even after we've already preventdefaulted the key event.
-	                var e = event;
-	                if (+e.clientX === 0 && +e.clientY === 0) {
-	                    event.preventDefault();
-	                }
-	            });
+	    this.tokens = [];
+	    this.tokens.links = Object.create(null);
+	    this.options = options || defaults$3;
+	    this.options.tokenizer = this.options.tokenizer || new Tokenizer$1();
+	    this.tokenizer = this.options.tokenizer;
+	    this.tokenizer.options = this.options;
+	    var rules = {
+	      block: block.normal,
+	      inline: inline.normal
+	    };
+
+	    if (this.options.pedantic) {
+	      rules.block = block.pedantic;
+	      rules.inline = inline.pedantic;
+	    } else if (this.options.gfm) {
+	      rules.block = block.gfm;
+
+	      if (this.options.breaks) {
+	        rules.inline = inline.breaks;
+	      } else {
+	        rules.inline = inline.gfm;
+	      }
+	    }
+
+	    this.tokenizer.rules = rules;
+	  }
+	  /**
+	   * Expose Rules
+	   */
 
-	        selection
-	            .on(_pointerPrefix + 'down.select', pointerdown)
-	            .on('contextmenu.select', contextmenu);
 
-	        if (event && event.shiftKey) {
-	            context.surface()
-	                .classed('behavior-multiselect', true);
-	        }
+	  _createClass$1(Lexer, [{
+	    key: "lex",
+	    value:
+	    /**
+	     * Preprocessing
+	     */
+	    function lex(src) {
+	      src = src.replace(/\r\n|\r/g, '\n').replace(/\t/g, '    ');
+	      this.blockTokens(src, this.tokens, true);
+	      this.inline(this.tokens);
+	      return this.tokens;
 	    }
+	    /**
+	     * Lexing
+	     */
 
+	  }, {
+	    key: "blockTokens",
+	    value: function blockTokens(src) {
+	      var tokens = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
+	      var top = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : true;
 
-	    behavior.off = function(selection) {
-	        cancelLongPress();
-
-	        select(window)
-	            .on('keydown.select', null)
-	            .on('keyup.select', null)
-	            .on('contextmenu.select-window', null)
-	            .on(_pointerPrefix + 'move.select', null, true)
-	            .on(_pointerPrefix + 'up.select', null, true)
-	            .on('pointercancel.select', null, true);
-
-	        selection
-	            .on(_pointerPrefix + 'down.select', null)
-	            .on('contextmenu.select', null);
+	      if (this.options.pedantic) {
+	        src = src.replace(/^ +$/gm, '');
+	      }
 
-	        context.surface()
-	            .classed('behavior-multiselect', false);
-	    };
+	      var token, i, l, lastToken;
 
+	      while (src) {
+	        // newline
+	        if (token = this.tokenizer.space(src)) {
+	          src = src.substring(token.raw.length);
 
-	    return behavior;
-	}
+	          if (token.type) {
+	            tokens.push(token);
+	          }
 
-	function behaviorDrawWay(context, wayID, mode, startGraph) {
+	          continue;
+	        } // code
 
-	    var dispatch$1 = dispatch('rejectedSelfIntersection');
 
-	    var behavior = behaviorDraw(context);
+	        if (token = this.tokenizer.code(src)) {
+	          src = src.substring(token.raw.length);
+	          lastToken = tokens[tokens.length - 1]; // An indented code block cannot interrupt a paragraph.
 
-	    // Must be set by `drawWay.nodeIndex` before each install of this behavior.
-	    var _nodeIndex;
+	          if (lastToken && lastToken.type === 'paragraph') {
+	            lastToken.raw += '\n' + token.raw;
+	            lastToken.text += '\n' + token.text;
+	          } else {
+	            tokens.push(token);
+	          }
 
-	    var _origWay;
-	    var _wayGeometry;
-	    var _headNodeID;
-	    var _annotation;
+	          continue;
+	        } // fences
 
-	    var _pointerHasMoved = false;
 
-	    // The osmNode to be placed.
-	    // This is temporary and just follows the mouse cursor until an "add" event occurs.
-	    var _drawNode;
+	        if (token = this.tokenizer.fences(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // heading
 
-	    var _didResolveTempEdit = false;
 
-	    function createDrawNode(loc) {
-	        // don't make the draw node until we actually need it
-	        _drawNode = osmNode({ loc: loc });
+	        if (token = this.tokenizer.heading(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // table no leading pipe (gfm)
 
-	        context.pauseChangeDispatch();
-	        context.replace(function actionAddDrawNode(graph) {
-	            // add the draw node to the graph and insert it into the way
-	            var way = graph.entity(wayID);
-	            return graph
-	                .replace(_drawNode)
-	                .replace(way.addNode(_drawNode.id, _nodeIndex));
-	        }, _annotation);
-	        context.resumeChangeDispatch();
 
-	        setActiveElements();
-	    }
+	        if (token = this.tokenizer.nptable(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // hr
 
-	    function removeDrawNode() {
 
-	        context.pauseChangeDispatch();
-	        context.replace(
-	            function actionDeleteDrawNode(graph) {
-	               var way = graph.entity(wayID);
-	               return graph
-	                   .replace(way.removeNode(_drawNode.id))
-	                   .remove(_drawNode);
-	           },
-	            _annotation
-	        );
-	        _drawNode = undefined;
-	        context.resumeChangeDispatch();
-	    }
+	        if (token = this.tokenizer.hr(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // blockquote
 
 
-	    function keydown() {
-	        if (event.keyCode === utilKeybinding.modifierCodes.alt) {
-	            if (context.surface().classed('nope')) {
-	                context.surface()
-	                    .classed('nope-suppressed', true);
-	            }
-	            context.surface()
-	                .classed('nope', false)
-	                .classed('nope-disabled', true);
-	        }
-	    }
+	        if (token = this.tokenizer.blockquote(src)) {
+	          src = src.substring(token.raw.length);
+	          token.tokens = this.blockTokens(token.text, [], top);
+	          tokens.push(token);
+	          continue;
+	        } // list
 
 
-	    function keyup() {
-	        if (event.keyCode === utilKeybinding.modifierCodes.alt) {
-	            if (context.surface().classed('nope-suppressed')) {
-	                context.surface()
-	                    .classed('nope', true);
-	            }
-	            context.surface()
-	                .classed('nope-suppressed', false)
-	                .classed('nope-disabled', false);
-	        }
-	    }
+	        if (token = this.tokenizer.list(src)) {
+	          src = src.substring(token.raw.length);
+	          l = token.items.length;
 
+	          for (i = 0; i < l; i++) {
+	            token.items[i].tokens = this.blockTokens(token.items[i].text, [], false);
+	          }
 
-	    function allowsVertex(d) {
-	        return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
-	    }
+	          tokens.push(token);
+	          continue;
+	        } // html
 
 
-	    // related code
-	    // - `mode/drag_node.js`     `doMove()`
-	    // - `behavior/draw.js`      `click()`
-	    // - `behavior/draw_way.js`  `move()`
-	    function move(datum) {
+	        if (token = this.tokenizer.html(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // def
 
-	        var loc = context.map().mouseCoordinates();
 
-	        if (!_drawNode) { createDrawNode(loc); }
+	        if (top && (token = this.tokenizer.def(src))) {
+	          src = src.substring(token.raw.length);
 
-	        context.surface().classed('nope-disabled', event.altKey);
+	          if (!this.tokens.links[token.tag]) {
+	            this.tokens.links[token.tag] = {
+	              href: token.href,
+	              title: token.title
+	            };
+	          }
 
-	        var targetLoc = datum && datum.properties && datum.properties.entity &&
-	            allowsVertex(datum.properties.entity) && datum.properties.entity.loc;
-	        var targetNodes = datum && datum.properties && datum.properties.nodes;
+	          continue;
+	        } // table (gfm)
 
-	        if (targetLoc) {   // snap to node/vertex - a point target with `.loc`
-	            loc = targetLoc;
 
-	        } else if (targetNodes) {   // snap to way - a line target with `.nodes`
-	            var choice = geoChooseEdge(targetNodes, context.map().mouse(), context.projection, _drawNode.id);
-	            if (choice) {
-	                loc = choice.loc;
-	            }
-	        }
+	        if (token = this.tokenizer.table(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // lheading
 
-	        context.replace(actionMoveNode(_drawNode.id, loc), _annotation);
-	        _drawNode = context.entity(_drawNode.id);
-	        checkGeometry(true /* includeDrawNode */);
-	    }
 
+	        if (token = this.tokenizer.lheading(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // top-level paragraph
 
-	    // Check whether this edit causes the geometry to break.
-	    // If so, class the surface with a nope cursor.
-	    // `includeDrawNode` - Only check the relevant line segments if finishing drawing
-	    function checkGeometry(includeDrawNode) {
-	        var nopeDisabled = context.surface().classed('nope-disabled');
-	        var isInvalid = isInvalidGeometry(includeDrawNode);
 
-	        if (nopeDisabled) {
-	            context.surface()
-	                .classed('nope', false)
-	                .classed('nope-suppressed', isInvalid);
-	        } else {
-	            context.surface()
-	                .classed('nope', isInvalid)
-	                .classed('nope-suppressed', false);
-	        }
-	    }
+	        if (top && (token = this.tokenizer.paragraph(src))) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // text
 
 
-	    function isInvalidGeometry(includeDrawNode) {
+	        if (token = this.tokenizer.text(src)) {
+	          src = src.substring(token.raw.length);
+	          lastToken = tokens[tokens.length - 1];
 
-	        var testNode = _drawNode;
+	          if (lastToken && lastToken.type === 'text') {
+	            lastToken.raw += '\n' + token.raw;
+	            lastToken.text += '\n' + token.text;
+	          } else {
+	            tokens.push(token);
+	          }
 
-	        // we only need to test the single way we're drawing
-	        var parentWay = context.graph().entity(wayID);
-	        var nodes = context.graph().childNodes(parentWay).slice();  // shallow copy
+	          continue;
+	        }
 
-	        if (includeDrawNode) {
-	            if (parentWay.isClosed()) {
-	                // don't test the last segment for closed ways - #4655
-	                // (still test the first segment)
-	                nodes.pop();
-	            }
-	        } else { // discount the draw node
+	        if (src) {
+	          var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
 
-	            if (parentWay.isClosed()) {
-	                if (nodes.length < 3) { return false; }
-	                if (_drawNode) { nodes.splice(-2, 1); }
-	                testNode = nodes[nodes.length - 2];
-	            } else {
-	                // there's nothing we need to test if we ignore the draw node on open ways
-	                return false;
-	            }
+	          if (this.options.silent) {
+	            console.error(errMsg);
+	            break;
+	          } else {
+	            throw new Error(errMsg);
+	          }
 	        }
+	      }
 
-	        return testNode && geoHasSelfIntersections(nodes, testNode.id);
+	      return tokens;
 	    }
+	  }, {
+	    key: "inline",
+	    value: function inline(tokens) {
+	      var i, j, k, l2, row, token;
+	      var l = tokens.length;
+
+	      for (i = 0; i < l; i++) {
+	        token = tokens[i];
+
+	        switch (token.type) {
+	          case 'paragraph':
+	          case 'text':
+	          case 'heading':
+	            {
+	              token.tokens = [];
+	              this.inlineTokens(token.text, token.tokens);
+	              break;
+	            }
 
+	          case 'table':
+	            {
+	              token.tokens = {
+	                header: [],
+	                cells: []
+	              }; // header
 
-	    function undone() {
-
-	        // undoing removed the temp edit
-	        _didResolveTempEdit = true;
-
-	        context.pauseChangeDispatch();
+	              l2 = token.header.length;
 
-	        var nextMode;
+	              for (j = 0; j < l2; j++) {
+	                token.tokens.header[j] = [];
+	                this.inlineTokens(token.header[j], token.tokens.header[j]);
+	              } // cells
 
-	        if (context.graph() === startGraph) {
-	            // We've undone back to the initial state before we started drawing.
-	            // Just exit the draw mode without undoing whatever we did before
-	            // we entered the draw mode.
-	            nextMode = modeSelect(context, [wayID]);
-	        } else {
-	            // The `undo` only removed the temporary edit, so here we have to
-	            // manually undo to actually remove the last node we added. We can't
-	            // use the `undo` function since the initial "add" graph doesn't have
-	            // an annotation and so cannot be undone to.
-	            context.pop(1);
 
-	            // continue drawing
-	            nextMode = mode;
-	        }
+	              l2 = token.cells.length;
 
-	        // clear the redo stack by adding and removing a blank edit
-	        context.perform(actionNoop());
-	        context.pop(1);
+	              for (j = 0; j < l2; j++) {
+	                row = token.cells[j];
+	                token.tokens.cells[j] = [];
 
-	        context.resumeChangeDispatch();
-	        context.enter(nextMode);
-	    }
+	                for (k = 0; k < row.length; k++) {
+	                  token.tokens.cells[j][k] = [];
+	                  this.inlineTokens(row[k], token.tokens.cells[j][k]);
+	                }
+	              }
 
+	              break;
+	            }
 
-	    function setActiveElements() {
-	        if (!_drawNode) { return; }
+	          case 'blockquote':
+	            {
+	              this.inline(token.tokens);
+	              break;
+	            }
 
-	        context.surface().selectAll('.' + _drawNode.id)
-	            .classed('active', true);
-	    }
+	          case 'list':
+	            {
+	              l2 = token.items.length;
 
+	              for (j = 0; j < l2; j++) {
+	                this.inline(token.items[j].tokens);
+	              }
 
-	    function resetToStartGraph() {
-	        while (context.graph() !== startGraph) {
-	            context.pop();
+	              break;
+	            }
 	        }
-	    }
-
+	      }
 
-	    var drawWay = function(surface) {
-	        _drawNode = undefined;
-	        _didResolveTempEdit = false;
-	        _origWay = context.entity(wayID);
-	        _headNodeID = typeof _nodeIndex === 'number' ? _origWay.nodes[_nodeIndex] :
-	            (_origWay.isClosed() ? _origWay.nodes[_origWay.nodes.length - 2] : _origWay.nodes[_origWay.nodes.length - 1]);
-	        _wayGeometry = _origWay.geometry(context.graph());
-	        _annotation = _t((_origWay.nodes.length === (_origWay.isClosed() ? 2 : 1) ?
-	            'operations.start.annotation.' :
-	            'operations.continue.annotation.') + _wayGeometry
-	        );
-	        _pointerHasMoved = false;
-
-	        // Push an annotated state for undo to return back to.
-	        // We must make sure to replace or remove it later.
-	        context.pauseChangeDispatch();
-	        context.perform(actionNoop(), _annotation);
-	        context.resumeChangeDispatch();
-
-	        behavior.hover()
-	            .initialNodeID(_headNodeID);
-
-	        behavior
-	            .on('move', function() {
-	                _pointerHasMoved = true;
-	                move.apply(this, arguments);
-	            })
-	            .on('down', function() {
-	                move.apply(this, arguments);
-	            })
-	            .on('downcancel', function() {
-	                if (_drawNode) { removeDrawNode(); }
-	            })
-	            .on('click', drawWay.add)
-	            .on('clickWay', drawWay.addWay)
-	            .on('clickNode', drawWay.addNode)
-	            .on('undo', context.undo)
-	            .on('cancel', drawWay.cancel)
-	            .on('finish', drawWay.finish);
-
-	        select(window)
-	            .on('keydown.drawWay', keydown)
-	            .on('keyup.drawWay', keyup);
-
-	        context.map()
-	            .dblclickZoomEnable(false)
-	            .on('drawn.draw', setActiveElements);
-
-	        setActiveElements();
-
-	        surface.call(behavior);
-
-	        context.history()
-	            .on('undone.draw', undone);
-	    };
+	      return tokens;
+	    }
+	    /**
+	     * Lexing/Compiling
+	     */
 
+	  }, {
+	    key: "inlineTokens",
+	    value: function inlineTokens(src) {
+	      var tokens = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
+	      var inLink = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
+	      var inRawBlock = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : false;
+	      var token, lastToken; // String with links masked to avoid interference with em and strong
 
-	    drawWay.off = function(surface) {
+	      var maskedSrc = src;
+	      var match;
+	      var keepPrevChar, prevChar; // Mask out reflinks
 
-	        if (!_didResolveTempEdit) {
-	            // Drawing was interrupted unexpectedly.
-	            // This can happen if the user changes modes,
-	            // clicks geolocate button, a hashchange event occurs, etc.
+	      if (this.tokens.links) {
+	        var links = Object.keys(this.tokens.links);
 
-	            context.pauseChangeDispatch();
-	            resetToStartGraph();
-	            context.resumeChangeDispatch();
+	        if (links.length > 0) {
+	          while ((match = this.tokenizer.rules.inline.reflinkSearch.exec(maskedSrc)) != null) {
+	            if (links.includes(match[0].slice(match[0].lastIndexOf('[') + 1, -1))) {
+	              maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex);
+	            }
+	          }
 	        }
+	      } // Mask out other blocks
 
-	        _drawNode = undefined;
-	        _nodeIndex = undefined;
-
-	        context.map()
-	            .on('drawn.draw', null);
 
-	        surface.call(behavior.off)
-	            .selectAll('.active')
-	            .classed('active', false);
+	      while ((match = this.tokenizer.rules.inline.blockSkip.exec(maskedSrc)) != null) {
+	        maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);
+	      } // Mask out escaped em & strong delimiters
 
-	        surface
-	            .classed('nope', false)
-	            .classed('nope-suppressed', false)
-	            .classed('nope-disabled', false);
 
-	        select(window)
-	            .on('keydown.drawWay', null)
-	            .on('keyup.drawWay', null);
-
-	        context.history()
-	            .on('undone.draw', null);
-	    };
-
-
-	    function attemptAdd(d, loc, doAdd) {
-
-	        if (_drawNode) {
-	            // move the node to the final loc in case move wasn't called
-	            // consistently (e.g. on touch devices)
-	            context.replace(actionMoveNode(_drawNode.id, loc), _annotation);
-	            _drawNode = context.entity(_drawNode.id);
-	        } else {
-	            createDrawNode(loc);
-	        }
+	      while ((match = this.tokenizer.rules.inline.escapedEmSt.exec(maskedSrc)) != null) {
+	        maskedSrc = maskedSrc.slice(0, match.index) + '++' + maskedSrc.slice(this.tokenizer.rules.inline.escapedEmSt.lastIndex);
+	      }
 
-	        checkGeometry(true /* includeDrawNode */);
-	        if ((d && d.properties && d.properties.nope) || context.surface().classed('nope')) {
-	            if (!_pointerHasMoved) {
-	                // prevent the temporary draw node from appearing on touch devices
-	                removeDrawNode();
-	            }
-	            dispatch$1.call('rejectedSelfIntersection', this);
-	            return;   // can't click here
+	      while (src) {
+	        if (!keepPrevChar) {
+	          prevChar = '';
 	        }
 
-	        context.pauseChangeDispatch();
-	        doAdd();
-	        // we just replaced the temporary edit with the real one
-	        _didResolveTempEdit = true;
-	        context.resumeChangeDispatch();
+	        keepPrevChar = false; // escape
 
-	        context.enter(mode);
-	    }
+	        if (token = this.tokenizer.escape(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // tag
 
 
-	    // Accept the current position of the drawing node
-	    drawWay.add = function(loc, d) {
-	        attemptAdd(d, loc, function() {
-	            // don't need to do anything extra
-	        });
-	    };
+	        if (token = this.tokenizer.tag(src, inLink, inRawBlock)) {
+	          src = src.substring(token.raw.length);
+	          inLink = token.inLink;
+	          inRawBlock = token.inRawBlock;
+	          var _lastToken = tokens[tokens.length - 1];
 
+	          if (_lastToken && token.type === 'text' && _lastToken.type === 'text') {
+	            _lastToken.raw += token.raw;
+	            _lastToken.text += token.text;
+	          } else {
+	            tokens.push(token);
+	          }
 
-	    // Connect the way to an existing way
-	    drawWay.addWay = function(loc, edge, d) {
-	        attemptAdd(d, loc, function() {
-	            context.replace(
-	                actionAddMidpoint({ loc: loc, edge: edge }, _drawNode),
-	                _annotation
-	            );
-	        });
-	    };
+	          continue;
+	        } // link
 
 
-	    // Connect the way to an existing node
-	    drawWay.addNode = function(node, d) {
+	        if (token = this.tokenizer.link(src)) {
+	          src = src.substring(token.raw.length);
 
-	        // finish drawing if the mapper targets the prior node
-	        if (node.id === _headNodeID ||
-	            // or the first node when drawing an area
-	            (_origWay.isClosed() && node.id === _origWay.first())) {
-	            drawWay.finish();
-	            return;
-	        }
+	          if (token.type === 'link') {
+	            token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
+	          }
 
-	        attemptAdd(d, node.loc, function() {
-	            context.replace(
-	                function actionReplaceDrawNode(graph) {
-	                    // remove the temporary draw node and insert the existing node
-	                    // at the same index
+	          tokens.push(token);
+	          continue;
+	        } // reflink, nolink
 
-	                    graph = graph
-	                        .replace(graph.entity(wayID).removeNode(_drawNode.id))
-	                        .remove(_drawNode);
-	                    return graph
-	                        .replace(graph.entity(wayID).addNode(node.id, _nodeIndex));
-	                },
-	                _annotation
-	            );
-	        });
-	    };
 
+	        if (token = this.tokenizer.reflink(src, this.tokens.links)) {
+	          src = src.substring(token.raw.length);
+	          var _lastToken2 = tokens[tokens.length - 1];
 
-	    // Finish the draw operation, removing the temporary edit.
-	    // If the way has enough nodes to be valid, it's selected.
-	    // Otherwise, delete everything and return to browse mode.
-	    drawWay.finish = function() {
-	        checkGeometry(false /* includeDrawNode */);
-	        if (context.surface().classed('nope')) {
-	            dispatch$1.call('rejectedSelfIntersection', this);
-	            return;   // can't click here
-	        }
+	          if (token.type === 'link') {
+	            token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
+	            tokens.push(token);
+	          } else if (_lastToken2 && token.type === 'text' && _lastToken2.type === 'text') {
+	            _lastToken2.raw += token.raw;
+	            _lastToken2.text += token.text;
+	          } else {
+	            tokens.push(token);
+	          }
 
-	        context.pauseChangeDispatch();
-	        // remove the temporary edit
-	        context.pop(1);
-	        _didResolveTempEdit = true;
-	        context.resumeChangeDispatch();
+	          continue;
+	        } // em & strong
 
-	        var way = context.hasEntity(wayID);
-	        if (!way || way.isDegenerate()) {
-	            drawWay.cancel();
-	            return;
-	        }
 
-	        window.setTimeout(function() {
-	            context.map().dblclickZoomEnable(true);
-	        }, 1000);
+	        if (token = this.tokenizer.emStrong(src, maskedSrc, prevChar)) {
+	          src = src.substring(token.raw.length);
+	          token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
+	          tokens.push(token);
+	          continue;
+	        } // code
 
-	        var isNewFeature = !mode.isContinuing;
-	        context.enter(modeSelect(context, [wayID]).newFeature(isNewFeature));
-	    };
 
+	        if (token = this.tokenizer.codespan(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // br
 
-	    // Cancel the draw operation, delete everything, and return to browse mode.
-	    drawWay.cancel = function() {
-	        context.pauseChangeDispatch();
-	        resetToStartGraph();
-	        context.resumeChangeDispatch();
 
-	        window.setTimeout(function() {
-	            context.map().dblclickZoomEnable(true);
-	        }, 1000);
+	        if (token = this.tokenizer.br(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // del (gfm)
 
-	        context.surface()
-	            .classed('nope', false)
-	            .classed('nope-disabled', false)
-	            .classed('nope-suppressed', false);
 
-	        context.enter(modeBrowse(context));
-	    };
+	        if (token = this.tokenizer.del(src)) {
+	          src = src.substring(token.raw.length);
+	          token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
+	          tokens.push(token);
+	          continue;
+	        } // autolink
 
 
-	    drawWay.nodeIndex = function(val) {
-	        if (!arguments.length) { return _nodeIndex; }
-	        _nodeIndex = val;
-	        return drawWay;
-	    };
+	        if (token = this.tokenizer.autolink(src, mangle)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // url (gfm)
 
 
-	    drawWay.activeID = function() {
-	        if (!arguments.length) { return _drawNode && _drawNode.id; }
-	        // no assign
-	        return drawWay;
-	    };
+	        if (!inLink && (token = this.tokenizer.url(src, mangle))) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // text
 
 
-	    return utilRebind(drawWay, dispatch$1, 'on');
-	}
+	        if (token = this.tokenizer.inlineText(src, inRawBlock, smartypants)) {
+	          src = src.substring(token.raw.length);
 
-	function modeDrawLine(context, wayID, startGraph, button, affix, continuing) {
-	    var mode = {
-	        button: button,
-	        id: 'draw-line'
-	    };
+	          if (token.raw.slice(-1) !== '_') {
+	            // Track prevChar before string of ____ started
+	            prevChar = token.raw.slice(-1);
+	          }
 
-	    var behavior = behaviorDrawWay(context, wayID, mode, startGraph)
-	        .on('rejectedSelfIntersection.modeDrawLine', function() {
-	            context.ui().flash
-	                .text(_t('self_intersection.error.lines'))();
-	        });
+	          keepPrevChar = true;
+	          lastToken = tokens[tokens.length - 1];
 
-	    mode.wayID = wayID;
+	          if (lastToken && lastToken.type === 'text') {
+	            lastToken.raw += token.raw;
+	            lastToken.text += token.text;
+	          } else {
+	            tokens.push(token);
+	          }
 
-	    mode.isContinuing = continuing;
+	          continue;
+	        }
 
-	    mode.enter = function() {
-	        behavior
-	            .nodeIndex(affix === 'prefix' ? 0 : undefined);
+	        if (src) {
+	          var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
 
-	        context.install(behavior);
-	    };
+	          if (this.options.silent) {
+	            console.error(errMsg);
+	            break;
+	          } else {
+	            throw new Error(errMsg);
+	          }
+	        }
+	      }
 
-	    mode.exit = function() {
-	        context.uninstall(behavior);
-	    };
+	      return tokens;
+	    }
+	  }], [{
+	    key: "rules",
+	    get: function get() {
+	      return {
+	        block: block,
+	        inline: inline
+	      };
+	    }
+	    /**
+	     * Static Lex Method
+	     */
 
-	    mode.selectedIDs = function() {
-	        return [wayID];
-	    };
+	  }, {
+	    key: "lex",
+	    value: function lex(src, options) {
+	      var lexer = new Lexer(options);
+	      return lexer.lex(src);
+	    }
+	    /**
+	     * Static Lex Inline Method
+	     */
 
-	    mode.activeID = function() {
-	        return (behavior && behavior.activeID()) || [];
-	    };
+	  }, {
+	    key: "lexInline",
+	    value: function lexInline(src, options) {
+	      var lexer = new Lexer(options);
+	      return lexer.inlineTokens(src);
+	    }
+	  }]);
 
-	    return mode;
-	}
+	  return Lexer;
+	}();
 
-	function operationContinue(context, selectedIDs) {
-	    var graph = context.graph();
-	    var entities = selectedIDs.map(function(id) { return graph.entity(id); });
-	    var geometries = Object.assign(
-	        { line: [], vertex: [] },
-	        utilArrayGroupBy(entities, function(entity) { return entity.geometry(graph); })
-	    );
-	    var vertex = geometries.vertex[0];
+	var defaults$2 = defaults$5.exports.defaults;
+	var cleanUrl = helpers.cleanUrl,
+	    escape$2 = helpers.escape;
+	/**
+	 * Renderer
+	 */
 
+	var Renderer_1 = /*#__PURE__*/function () {
+	  function Renderer(options) {
+	    _classCallCheck$1(this, Renderer);
 
-	    function candidateWays() {
-	        return graph.parentWays(vertex).filter(function(parent) {
-	            return parent.geometry(graph) === 'line' &&
-	                !parent.isClosed() &&
-	                parent.affix(vertex.id) &&
-	                (geometries.line.length === 0 || geometries.line[0] === parent);
-	        });
-	    }
+	    this.options = options || defaults$2;
+	  }
 
+	  _createClass$1(Renderer, [{
+	    key: "code",
+	    value: function code(_code, infostring, escaped) {
+	      var lang = (infostring || '').match(/\S*/)[0];
 
-	    var operation = function() {
-	        var candidate = candidateWays()[0];
-	        context.enter(
-	            modeDrawLine(context, candidate.id, context.graph(), 'line', candidate.affix(vertex.id), true)
-	        );
-	    };
+	      if (this.options.highlight) {
+	        var out = this.options.highlight(_code, lang);
 
+	        if (out != null && out !== _code) {
+	          escaped = true;
+	          _code = out;
+	        }
+	      }
 
-	    operation.available = function() {
-	        return geometries.vertex.length === 1 &&
-	            geometries.line.length <= 1 &&
-	            !context.features().hasHiddenConnections(vertex, context.graph());
-	    };
+	      _code = _code.replace(/\n$/, '') + '\n';
 
+	      if (!lang) {
+	        return '<pre><code>' + (escaped ? _code : escape$2(_code, true)) + '</code></pre>\n';
+	      }
 
-	    operation.disabled = function() {
-	        var candidates = candidateWays();
-	        if (candidates.length === 0) {
-	            return 'not_eligible';
-	        } else if (candidates.length > 1) {
-	            return 'multiple';
-	        }
+	      return '<pre><code class="' + this.options.langPrefix + escape$2(lang, true) + '">' + (escaped ? _code : escape$2(_code, true)) + '</code></pre>\n';
+	    }
+	  }, {
+	    key: "blockquote",
+	    value: function blockquote(quote) {
+	      return '<blockquote>\n' + quote + '</blockquote>\n';
+	    }
+	  }, {
+	    key: "html",
+	    value: function html(_html) {
+	      return _html;
+	    }
+	  }, {
+	    key: "heading",
+	    value: function heading(text, level, raw, slugger) {
+	      if (this.options.headerIds) {
+	        return '<h' + level + ' id="' + this.options.headerPrefix + slugger.slug(raw) + '">' + text + '</h' + level + '>\n';
+	      } // ignore IDs
 
-	        return false;
-	    };
 
+	      return '<h' + level + '>' + text + '</h' + level + '>\n';
+	    }
+	  }, {
+	    key: "hr",
+	    value: function hr() {
+	      return this.options.xhtml ? '<hr/>\n' : '<hr>\n';
+	    }
+	  }, {
+	    key: "list",
+	    value: function list(body, ordered, start) {
+	      var type = ordered ? 'ol' : 'ul',
+	          startatt = ordered && start !== 1 ? ' start="' + start + '"' : '';
+	      return '<' + type + startatt + '>\n' + body + '</' + type + '>\n';
+	    }
+	  }, {
+	    key: "listitem",
+	    value: function listitem(text) {
+	      return '<li>' + text + '</li>\n';
+	    }
+	  }, {
+	    key: "checkbox",
+	    value: function checkbox(checked) {
+	      return '<input ' + (checked ? 'checked="" ' : '') + 'disabled="" type="checkbox"' + (this.options.xhtml ? ' /' : '') + '> ';
+	    }
+	  }, {
+	    key: "paragraph",
+	    value: function paragraph(text) {
+	      return '<p>' + text + '</p>\n';
+	    }
+	  }, {
+	    key: "table",
+	    value: function table(header, body) {
+	      if (body) body = '<tbody>' + body + '</tbody>';
+	      return '<table>\n' + '<thead>\n' + header + '</thead>\n' + body + '</table>\n';
+	    }
+	  }, {
+	    key: "tablerow",
+	    value: function tablerow(content) {
+	      return '<tr>\n' + content + '</tr>\n';
+	    }
+	  }, {
+	    key: "tablecell",
+	    value: function tablecell(content, flags) {
+	      var type = flags.header ? 'th' : 'td';
+	      var tag = flags.align ? '<' + type + ' align="' + flags.align + '">' : '<' + type + '>';
+	      return tag + content + '</' + type + '>\n';
+	    } // span level renderer
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.continue.' + disable) :
-	            _t('operations.continue.description');
-	    };
+	  }, {
+	    key: "strong",
+	    value: function strong(text) {
+	      return '<strong>' + text + '</strong>';
+	    }
+	  }, {
+	    key: "em",
+	    value: function em(text) {
+	      return '<em>' + text + '</em>';
+	    }
+	  }, {
+	    key: "codespan",
+	    value: function codespan(text) {
+	      return '<code>' + text + '</code>';
+	    }
+	  }, {
+	    key: "br",
+	    value: function br() {
+	      return this.options.xhtml ? '<br/>' : '<br>';
+	    }
+	  }, {
+	    key: "del",
+	    value: function del(text) {
+	      return '<del>' + text + '</del>';
+	    }
+	  }, {
+	    key: "link",
+	    value: function link(href, title, text) {
+	      href = cleanUrl(this.options.sanitize, this.options.baseUrl, href);
 
+	      if (href === null) {
+	        return text;
+	      }
 
-	    operation.annotation = function() {
-	        return _t('operations.continue.annotation.line');
-	    };
+	      var out = '<a href="' + escape$2(href) + '"';
 
+	      if (title) {
+	        out += ' title="' + title + '"';
+	      }
 
-	    operation.id = 'continue';
-	    operation.keys = [_t('operations.continue.key')];
-	    operation.title = _t('operations.continue.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	      out += '>' + text + '</a>';
+	      return out;
+	    }
+	  }, {
+	    key: "image",
+	    value: function image(href, title, text) {
+	      href = cleanUrl(this.options.sanitize, this.options.baseUrl, href);
 
-	    return operation;
-	}
+	      if (href === null) {
+	        return text;
+	      }
 
-	function operationCopy(context, selectedIDs) {
+	      var out = '<img src="' + href + '" alt="' + text + '"';
 
-	    var _multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+	      if (title) {
+	        out += ' title="' + title + '"';
+	      }
 
-	    function getFilteredIdsToCopy() {
-	        return selectedIDs.filter(function(selectedID) {
-	            var entity = context.graph().hasEntity(selectedID);
-	            // don't copy untagged vertices separately from ways
-	            return entity.hasInterestingTags() || entity.geometry(context.graph()) !== 'vertex';
-	        });
+	      out += this.options.xhtml ? '/>' : '>';
+	      return out;
+	    }
+	  }, {
+	    key: "text",
+	    value: function text(_text) {
+	      return _text;
 	    }
+	  }]);
 
-	    var operation = function() {
+	  return Renderer;
+	}();
 
-	        var graph = context.graph();
-	        var selected = groupEntities(getFilteredIdsToCopy(), graph);
-	        var canCopy = [];
-	        var skip = {};
-	        var entity;
-	        var i;
+	var TextRenderer_1 = /*#__PURE__*/function () {
+	  function TextRenderer() {
+	    _classCallCheck$1(this, TextRenderer);
+	  }
 
-	        for (i = 0; i < selected.relation.length; i++) {
-	            entity = selected.relation[i];
-	            if (!skip[entity.id] && entity.isComplete(graph)) {
-	                canCopy.push(entity.id);
-	                skip = getDescendants(entity.id, graph, skip);
-	            }
-	        }
-	        for (i = 0; i < selected.way.length; i++) {
-	            entity = selected.way[i];
-	            if (!skip[entity.id]) {
-	                canCopy.push(entity.id);
-	                skip = getDescendants(entity.id, graph, skip);
-	            }
-	        }
-	        for (i = 0; i < selected.node.length; i++) {
-	            entity = selected.node[i];
-	            if (!skip[entity.id]) {
-	                canCopy.push(entity.id);
-	            }
-	        }
+	  _createClass$1(TextRenderer, [{
+	    key: "strong",
+	    value: // no need for block level renderers
+	    function strong(text) {
+	      return text;
+	    }
+	  }, {
+	    key: "em",
+	    value: function em(text) {
+	      return text;
+	    }
+	  }, {
+	    key: "codespan",
+	    value: function codespan(text) {
+	      return text;
+	    }
+	  }, {
+	    key: "del",
+	    value: function del(text) {
+	      return text;
+	    }
+	  }, {
+	    key: "html",
+	    value: function html(text) {
+	      return text;
+	    }
+	  }, {
+	    key: "text",
+	    value: function text(_text) {
+	      return _text;
+	    }
+	  }, {
+	    key: "link",
+	    value: function link(href, title, text) {
+	      return '' + text;
+	    }
+	  }, {
+	    key: "image",
+	    value: function image(href, title, text) {
+	      return '' + text;
+	    }
+	  }, {
+	    key: "br",
+	    value: function br() {
+	      return '';
+	    }
+	  }]);
 
-	        context.copyIDs(canCopy);
-	        if (_point &&
-	            (canCopy.length !== 1 || graph.entity(canCopy[0]).type !== 'node')) {
-	            // store the anchor coordinates if copying more than a single node
-	            context.copyLonLat(context.projection.invert(_point));
-	        } else {
-	            context.copyLonLat(null);
-	        }
+	  return TextRenderer;
+	}();
 
-	    };
+	var Slugger_1 = /*#__PURE__*/function () {
+	  function Slugger() {
+	    _classCallCheck$1(this, Slugger);
 
+	    this.seen = {};
+	  }
 
-	    function groupEntities(ids, graph) {
-	        var entities = ids.map(function (id) { return graph.entity(id); });
-	        return Object.assign(
-	            { relation: [], way: [], node: [] },
-	            utilArrayGroupBy(entities, 'type')
-	        );
+	  _createClass$1(Slugger, [{
+	    key: "serialize",
+	    value: function serialize(value) {
+	      return value.toLowerCase().trim() // remove html tags
+	      .replace(/<[!\/a-z].*?>/ig, '') // remove unwanted chars
+	      .replace(/[\u2000-\u206F\u2E00-\u2E7F\\'!"#$%&()*+,./:;<=>?@[\]^`{|}~]/g, '').replace(/\s/g, '-');
 	    }
+	    /**
+	     * Finds the next safe (unique) slug to use
+	     */
 
+	  }, {
+	    key: "getNextSafeSlug",
+	    value: function getNextSafeSlug(originalSlug, isDryRun) {
+	      var slug = originalSlug;
+	      var occurenceAccumulator = 0;
 
-	    function getDescendants(id, graph, descendants) {
-	        var entity = graph.entity(id);
-	        var children;
+	      if (this.seen.hasOwnProperty(slug)) {
+	        occurenceAccumulator = this.seen[originalSlug];
 
-	        descendants = descendants || {};
+	        do {
+	          occurenceAccumulator++;
+	          slug = originalSlug + '-' + occurenceAccumulator;
+	        } while (this.seen.hasOwnProperty(slug));
+	      }
 
-	        if (entity.type === 'relation') {
-	            children = entity.members.map(function(m) { return m.id; });
-	        } else if (entity.type === 'way') {
-	            children = entity.nodes;
-	        } else {
-	            children = [];
-	        }
+	      if (!isDryRun) {
+	        this.seen[originalSlug] = occurenceAccumulator;
+	        this.seen[slug] = 0;
+	      }
 
-	        for (var i = 0; i < children.length; i++) {
-	            if (!descendants[children[i]]) {
-	                descendants[children[i]] = true;
-	                descendants = getDescendants(children[i], graph, descendants);
-	            }
-	        }
+	      return slug;
+	    }
+	    /**
+	     * Convert string to unique id
+	     * @param {object} options
+	     * @param {boolean} options.dryrun Generates the next unique slug without updating the internal accumulator.
+	     */
 
-	        return descendants;
+	  }, {
+	    key: "slug",
+	    value: function slug(value) {
+	      var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+	      var slug = this.serialize(value);
+	      return this.getNextSafeSlug(slug, options.dryrun);
 	    }
+	  }]);
 
+	  return Slugger;
+	}();
 
-	    operation.available = function() {
-	        return getFilteredIdsToCopy().length > 0;
-	    };
+	var Renderer$1 = Renderer_1;
+	var TextRenderer$1 = TextRenderer_1;
+	var Slugger$1 = Slugger_1;
+	var defaults$1 = defaults$5.exports.defaults;
+	var unescape$1 = helpers.unescape;
+	/**
+	 * Parsing & Compiling
+	 */
 
+	var Parser_1 = /*#__PURE__*/function () {
+	  function Parser(options) {
+	    _classCallCheck$1(this, Parser);
 
-	    operation.disabled = function() {
-	        var extent = utilTotalExtent(getFilteredIdsToCopy(), context.graph());
-	        if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        }
-	        return false;
-	    };
+	    this.options = options || defaults$1;
+	    this.options.renderer = this.options.renderer || new Renderer$1();
+	    this.renderer = this.options.renderer;
+	    this.renderer.options = this.options;
+	    this.textRenderer = new TextRenderer$1();
+	    this.slugger = new Slugger$1();
+	  }
+	  /**
+	   * Static Parse Method
+	   */
 
 
-	    operation.availableForKeypress = function() {
-	        var selection = window.getSelection && window.getSelection();
-	        // if the user has text selected then let them copy that, not the selected feature
-	        return !selection || !selection.toString();
-	    };
+	  _createClass$1(Parser, [{
+	    key: "parse",
+	    value:
+	    /**
+	     * Parse Loop
+	     */
+	    function parse(tokens) {
+	      var top = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : true;
+	      var out = '',
+	          i,
+	          j,
+	          k,
+	          l2,
+	          l3,
+	          row,
+	          cell,
+	          header,
+	          body,
+	          token,
+	          ordered,
+	          start,
+	          loose,
+	          itemBody,
+	          item,
+	          checked,
+	          task,
+	          checkbox;
+	      var l = tokens.length;
+
+	      for (i = 0; i < l; i++) {
+	        token = tokens[i];
+
+	        switch (token.type) {
+	          case 'space':
+	            {
+	              continue;
+	            }
 
+	          case 'hr':
+	            {
+	              out += this.renderer.hr();
+	              continue;
+	            }
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.copy.' + disable + '.' + _multi) :
-	            _t('operations.copy.description' + '.' + _multi);
-	    };
+	          case 'heading':
+	            {
+	              out += this.renderer.heading(this.parseInline(token.tokens), token.depth, unescape$1(this.parseInline(token.tokens, this.textRenderer)), this.slugger);
+	              continue;
+	            }
 
+	          case 'code':
+	            {
+	              out += this.renderer.code(token.text, token.lang, token.escaped);
+	              continue;
+	            }
 
-	    operation.annotation = function() {
-	        return selectedIDs.length === 1 ?
-	            _t('operations.copy.annotation.single') :
-	            _t('operations.copy.annotation.multiple', { n: selectedIDs.length.toString() });
-	    };
+	          case 'table':
+	            {
+	              header = ''; // header
 
+	              cell = '';
+	              l2 = token.header.length;
 
-	    var _point;
-	    operation.point = function(val) {
-	        _point = val;
-	        return operation;
-	    };
+	              for (j = 0; j < l2; j++) {
+	                cell += this.renderer.tablecell(this.parseInline(token.tokens.header[j]), {
+	                  header: true,
+	                  align: token.align[j]
+	                });
+	              }
 
+	              header += this.renderer.tablerow(cell);
+	              body = '';
+	              l2 = token.cells.length;
 
-	    operation.id = 'copy';
-	    operation.keys = [uiCmd('⌘C')];
-	    operation.title = _t('operations.copy.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	              for (j = 0; j < l2; j++) {
+	                row = token.tokens.cells[j];
+	                cell = '';
+	                l3 = row.length;
 
-	    return operation;
-	}
+	                for (k = 0; k < l3; k++) {
+	                  cell += this.renderer.tablecell(this.parseInline(row[k]), {
+	                    header: false,
+	                    align: token.align[k]
+	                  });
+	                }
 
-	function operationDisconnect(context, selectedIDs) {
-	    var _vertexIDs = [];
-	    var _wayIDs = [];
-	    var _otherIDs = [];
-	    var _actions = [];
+	                body += this.renderer.tablerow(cell);
+	              }
 
-	    selectedIDs.forEach(function(id) {
-	        var entity = context.entity(id);
-	        if (entity.type === 'way'){
-	            _wayIDs.push(id);
-	        } else if (entity.geometry(context.graph()) === 'vertex') {
-	            _vertexIDs.push(id);
-	        } else {
-	            _otherIDs.push(id);
-	        }
-	    });
+	              out += this.renderer.table(header, body);
+	              continue;
+	            }
 
-	    var _extent, _nodes, _coords, _descriptionID = '', _annotationID = 'features';
+	          case 'blockquote':
+	            {
+	              body = this.parse(token.tokens);
+	              out += this.renderer.blockquote(body);
+	              continue;
+	            }
 
-	    if (_vertexIDs.length > 0) {
-	        // At the selected vertices, disconnect the selected ways, if any, else
-	        // disconnect all connected ways
+	          case 'list':
+	            {
+	              ordered = token.ordered;
+	              start = token.start;
+	              loose = token.loose;
+	              l2 = token.items.length;
+	              body = '';
+
+	              for (j = 0; j < l2; j++) {
+	                item = token.items[j];
+	                checked = item.checked;
+	                task = item.task;
+	                itemBody = '';
+
+	                if (item.task) {
+	                  checkbox = this.renderer.checkbox(checked);
+
+	                  if (loose) {
+	                    if (item.tokens.length > 0 && item.tokens[0].type === 'text') {
+	                      item.tokens[0].text = checkbox + ' ' + item.tokens[0].text;
+
+	                      if (item.tokens[0].tokens && item.tokens[0].tokens.length > 0 && item.tokens[0].tokens[0].type === 'text') {
+	                        item.tokens[0].tokens[0].text = checkbox + ' ' + item.tokens[0].tokens[0].text;
+	                      }
+	                    } else {
+	                      item.tokens.unshift({
+	                        type: 'text',
+	                        text: checkbox
+	                      });
+	                    }
+	                  } else {
+	                    itemBody += checkbox;
+	                  }
+	                }
 
-	        _extent = utilTotalExtent(_vertexIDs, context.graph());
+	                itemBody += this.parse(item.tokens, loose);
+	                body += this.renderer.listitem(itemBody, task, checked);
+	              }
 
-	        _vertexIDs.forEach(function(vertexID) {
-	            var action = actionDisconnect(vertexID);
+	              out += this.renderer.list(body, ordered, start);
+	              continue;
+	            }
 
-	            if (_wayIDs.length > 0) {
-	                var waysIDsForVertex = _wayIDs.filter(function(wayID) {
-	                    var way = context.entity(wayID);
-	                    return way.nodes.indexOf(vertexID) !== -1;
-	                });
-	                action.limitWays(waysIDsForVertex);
+	          case 'html':
+	            {
+	              // TODO parse inline content if parameter markdown=1
+	              out += this.renderer.html(token.text);
+	              continue;
 	            }
-	            _actions.push(action);
-	        });
 
-	        _descriptionID += _actions.length === 1 ? 'single_point.' : 'multiple_points.';
-	        if (_wayIDs.length === 1) {
-	            _descriptionID += 'single_way.' + context.graph().geometry(_wayIDs[0]);
-	        } else {
-	            _descriptionID += _wayIDs.length === 0 ? 'no_ways' : 'multiple_ways';
-	        }
+	          case 'paragraph':
+	            {
+	              out += this.renderer.paragraph(this.parseInline(token.tokens));
+	              continue;
+	            }
 
-	    } else if (_wayIDs.length > 0) {
-	        // Disconnect the selected ways from each other, if they're connected,
-	        // else disconnect them from all connected ways
+	          case 'text':
+	            {
+	              body = token.tokens ? this.parseInline(token.tokens) : token.text;
 
-	        var ways = _wayIDs.map(function(id) {
-	            return context.entity(id);
-	        });
-	        _nodes = utilGetAllNodes(_wayIDs, context.graph());
-	        _coords = _nodes.map(function(n) { return n.loc; });
-
-	        // actions for connected nodes shared by at least two selected ways
-	        var sharedActions = [];
-	        var sharedNodes = [];
-	        // actions for connected nodes
-	        var unsharedActions = [];
-	        var unsharedNodes = [];
-
-	        _nodes.forEach(function(node) {
-	            var action = actionDisconnect(node.id).limitWays(_wayIDs);
-	            if (action.disabled(context.graph()) !== 'not_connected') {
-
-	                var count = 0;
-	                for (var i in ways) {
-	                    var way = ways[i];
-	                    if (way.nodes.indexOf(node.id) !== -1) {
-	                        count += 1;
-	                    }
-	                    if (count > 1) { break; }
-	                }
+	              while (i + 1 < l && tokens[i + 1].type === 'text') {
+	                token = tokens[++i];
+	                body += '\n' + (token.tokens ? this.parseInline(token.tokens) : token.text);
+	              }
 
-	                if (count > 1) {
-	                    sharedActions.push(action);
-	                    sharedNodes.push(node);
-	                } else {
-	                    unsharedActions.push(action);
-	                    unsharedNodes.push(node);
-	                }
+	              out += top ? this.renderer.paragraph(body) : body;
+	              continue;
 	            }
-	        });
 
-	        _descriptionID += 'no_points.';
-	        _descriptionID += _wayIDs.length === 1 ? 'single_way.' : 'multiple_ways.';
+	          default:
+	            {
+	              var errMsg = 'Token with "' + token.type + '" type was not found.';
 
-	        if (sharedActions.length) {
-	            // if any nodes are shared, only disconnect the selected ways from each other
-	            _actions = sharedActions;
-	            _extent = utilTotalExtent(sharedNodes, context.graph());
-	            _descriptionID += 'conjoined';
-	            _annotationID = 'from_each_other';
-	        } else {
-	            // if no nodes are shared, disconnect the selected ways from all connected ways
-	            _actions = unsharedActions;
-	            _extent = utilTotalExtent(unsharedNodes, context.graph());
-	            if (_wayIDs.length === 1) {
-	                _descriptionID += context.graph().geometry(_wayIDs[0]);
-	            } else {
-	                _descriptionID += 'separate';
+	              if (this.options.silent) {
+	                console.error(errMsg);
+	                return;
+	              } else {
+	                throw new Error(errMsg);
+	              }
 	            }
 	        }
-	    }
-
-
-	    var operation = function() {
-	        context.perform(function(graph) {
-	            return _actions.reduce(function(graph, action) { return action(graph); }, graph);
-	        }, operation.annotation());
+	      }
 
-	        context.validator().validate();
-	    };
+	      return out;
+	    }
+	    /**
+	     * Parse Inline Tokens
+	     */
 
+	  }, {
+	    key: "parseInline",
+	    value: function parseInline(tokens, renderer) {
+	      renderer = renderer || this.renderer;
+	      var out = '',
+	          i,
+	          token;
+	      var l = tokens.length;
+
+	      for (i = 0; i < l; i++) {
+	        token = tokens[i];
+
+	        switch (token.type) {
+	          case 'escape':
+	            {
+	              out += renderer.text(token.text);
+	              break;
+	            }
 
-	    operation.available = function() {
-	        if (_actions.length === 0) { return false; }
-	        if (_otherIDs.length !== 0) { return false; }
+	          case 'html':
+	            {
+	              out += renderer.html(token.text);
+	              break;
+	            }
 
-	        if (_vertexIDs.length !== 0 && _wayIDs.length !== 0 && !_wayIDs.every(function(wayID) {
-	            return _vertexIDs.some(function(vertexID) {
-	                var way = context.entity(wayID);
-	                return way.nodes.indexOf(vertexID) !== -1;
-	            });
-	        })) { return false; }
+	          case 'link':
+	            {
+	              out += renderer.link(token.href, token.title, this.parseInline(token.tokens, renderer));
+	              break;
+	            }
 
-	        return true;
-	    };
+	          case 'image':
+	            {
+	              out += renderer.image(token.href, token.title, token.text);
+	              break;
+	            }
 
+	          case 'strong':
+	            {
+	              out += renderer.strong(this.parseInline(token.tokens, renderer));
+	              break;
+	            }
 
-	    operation.disabled = function() {
-	        var reason;
-	        for (var actionIndex in _actions) {
-	            reason = _actions[actionIndex].disabled(context.graph());
-	            if (reason) { return reason; }
-	        }
+	          case 'em':
+	            {
+	              out += renderer.em(this.parseInline(token.tokens, renderer));
+	              break;
+	            }
 
-	        if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large.' + ((_vertexIDs.length ? _vertexIDs : _wayIDs).length === 1 ? 'single' : 'multiple');
-	        } else if (_coords && someMissing()) {
-	            return 'not_downloaded';
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        }
+	          case 'codespan':
+	            {
+	              out += renderer.codespan(token.text);
+	              break;
+	            }
 
-	        return false;
+	          case 'br':
+	            {
+	              out += renderer.br();
+	              break;
+	            }
 
+	          case 'del':
+	            {
+	              out += renderer.del(this.parseInline(token.tokens, renderer));
+	              break;
+	            }
 
-	        function someMissing() {
-	            if (context.inIntro()) { return false; }
-	            var osm = context.connection();
-	            if (osm) {
-	                var missing = _coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-	                if (missing.length) {
-	                    missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-	                    return true;
-	                }
+	          case 'text':
+	            {
+	              out += renderer.text(token.text);
+	              break;
 	            }
-	            return false;
-	        }
-	    };
 
+	          default:
+	            {
+	              var errMsg = 'Token with "' + token.type + '" type was not found.';
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        if (disable) {
-	            return _t('operations.disconnect.' + disable);
+	              if (this.options.silent) {
+	                console.error(errMsg);
+	                return;
+	              } else {
+	                throw new Error(errMsg);
+	              }
+	            }
 	        }
-	        return _t('operations.disconnect.description.' + _descriptionID);
-	    };
+	      }
 
+	      return out;
+	    }
+	  }], [{
+	    key: "parse",
+	    value: function parse(tokens, options) {
+	      var parser = new Parser(options);
+	      return parser.parse(tokens);
+	    }
+	    /**
+	     * Static Parse Inline Method
+	     */
 
-	    operation.annotation = function() {
-	        return _t('operations.disconnect.annotation.' + _annotationID);
-	    };
+	  }, {
+	    key: "parseInline",
+	    value: function parseInline(tokens, options) {
+	      var parser = new Parser(options);
+	      return parser.parseInline(tokens);
+	    }
+	  }]);
 
+	  return Parser;
+	}();
+
+	var Lexer = Lexer_1;
+	var Parser = Parser_1;
+	var Tokenizer = Tokenizer_1;
+	var Renderer = Renderer_1;
+	var TextRenderer = TextRenderer_1;
+	var Slugger = Slugger_1;
+	var merge = helpers.merge,
+	    checkSanitizeDeprecation = helpers.checkSanitizeDeprecation,
+	    escape$1 = helpers.escape;
+	var getDefaults = defaults$5.exports.getDefaults,
+	    changeDefaults = defaults$5.exports.changeDefaults,
+	    defaults = defaults$5.exports.defaults;
+	/**
+	 * Marked
+	 */
 
-	    operation.id = 'disconnect';
-	    operation.keys = [_t('operations.disconnect.key')];
-	    operation.title = _t('operations.disconnect.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	function marked(src, opt, callback) {
+	  // throw error in case of non string input
+	  if (typeof src === 'undefined' || src === null) {
+	    throw new Error('marked(): input parameter is undefined or null');
+	  }
 
-	    return operation;
-	}
+	  if (typeof src !== 'string') {
+	    throw new Error('marked(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
+	  }
 
-	function operationDowngrade(context, selectedIDs) {
-	    var affectedFeatureCount = 0;
-	    var downgradeType;
+	  if (typeof opt === 'function') {
+	    callback = opt;
+	    opt = null;
+	  }
 
-	    setDowngradeTypeForEntityIDs();
+	  opt = merge({}, marked.defaults, opt || {});
+	  checkSanitizeDeprecation(opt);
 
-	    var multi = affectedFeatureCount === 1 ? 'single' : 'multiple';
+	  if (callback) {
+	    var highlight = opt.highlight;
+	    var tokens;
 
-	    function setDowngradeTypeForEntityIDs() {
-	        for (var i in selectedIDs) {
-	            var entityID = selectedIDs[i];
-	            var type = downgradeTypeForEntityID(entityID);
-	            if (type) {
-	                affectedFeatureCount += 1;
-	                if (downgradeType && type !== downgradeType) {
-	                    downgradeType = 'building_address';
-	                } else {
-	                    downgradeType = type;
-	                }
-	            }
-	        }
+	    try {
+	      tokens = Lexer.lex(src, opt);
+	    } catch (e) {
+	      return callback(e);
 	    }
 
-	    function downgradeTypeForEntityID(entityID) {
-	        var graph = context.graph();
-	        var entity = graph.entity(entityID);
-	        var preset = _mainPresetIndex.match(entity, graph);
-
-	        if (!preset || preset.isFallback()) { return null; }
+	    var done = function done(err) {
+	      var out;
 
-	        if (entity.type === 'node' &&
-	            preset.id !== 'address' &&
-	            Object.keys(entity.tags).some(function(key) {
-	                return key.match(/^addr:.{1,}/);
-	            })) {
+	      if (!err) {
+	        try {
+	          if (opt.walkTokens) {
+	            marked.walkTokens(tokens, opt.walkTokens);
+	          }
 
-	            return 'address';
+	          out = Parser.parse(tokens, opt);
+	        } catch (e) {
+	          err = e;
 	        }
-	        if (entity.geometry(graph) === 'area' &&
-	            entity.tags.building &&
-	            !preset.tags.building) {
+	      }
 
-	            return 'building';
-	        }
+	      opt.highlight = highlight;
+	      return err ? callback(err) : callback(null, out);
+	    };
 
-	        return null;
+	    if (!highlight || highlight.length < 3) {
+	      return done();
 	    }
 
-	    var buildingKeysToKeep = ['architect', 'building', 'height', 'layer', 'source', 'type', 'wheelchair'];
-	    var addressKeysToKeep = ['source'];
-
-	    var operation = function () {
-	        context.perform(function(graph) {
-
-	            for (var i in selectedIDs) {
-	                var entityID = selectedIDs[i];
-	                var type = downgradeTypeForEntityID(entityID);
-	                if (!type) { continue; }
-
-	                var tags = Object.assign({}, graph.entity(entityID).tags);  // shallow copy
-	                for (var key in tags) {
-	                    if (type === 'address' && addressKeysToKeep.indexOf(key) !== -1) { continue; }
-	                    if (type === 'building') {
-	                        if (buildingKeysToKeep.indexOf(key) !== -1 ||
-	                            key.match(/^building:.{1,}/) ||
-	                            key.match(/^roof:.{1,}/)) { continue; }
-	                    }
-	                    // keep address tags for buildings too
-	                    if (key.match(/^addr:.{1,}/)) { continue; }
-
-	                    delete tags[key];
-	                }
-	                graph = actionChangeTags(entityID, tags)(graph);
+	    delete opt.highlight;
+	    if (!tokens.length) return done();
+	    var pending = 0;
+	    marked.walkTokens(tokens, function (token) {
+	      if (token.type === 'code') {
+	        pending++;
+	        setTimeout(function () {
+	          highlight(token.text, token.lang, function (err, code) {
+	            if (err) {
+	              return done(err);
 	            }
-	            return graph;
-	        }, operation.annotation());
 
-	        context.validator().validate();
+	            if (code != null && code !== token.text) {
+	              token.text = code;
+	              token.escaped = true;
+	            }
 
-	        // refresh the select mode to enable the delete operation
-	        context.enter(modeSelect(context, selectedIDs));
-	    };
+	            pending--;
 
+	            if (pending === 0) {
+	              done();
+	            }
+	          });
+	        }, 0);
+	      }
+	    });
 
-	    operation.available = function () {
-	        return downgradeType;
-	    };
+	    if (pending === 0) {
+	      done();
+	    }
 
+	    return;
+	  }
 
-	    operation.disabled = function () {
-	        if (selectedIDs.some(hasWikidataTag)) {
-	            return 'has_wikidata_tag';
-	        }
-	        return false;
+	  try {
+	    var _tokens = Lexer.lex(src, opt);
 
-	        function hasWikidataTag(id) {
-	            var entity = context.entity(id);
-	            return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
-	        }
-	    };
+	    if (opt.walkTokens) {
+	      marked.walkTokens(_tokens, opt.walkTokens);
+	    }
 
+	    return Parser.parse(_tokens, opt);
+	  } catch (e) {
+	    e.message += '\nPlease report this to https://github.com/markedjs/marked.';
 
-	    operation.tooltip = function () {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.downgrade.' + disable + '.' + multi) :
-	            _t('operations.downgrade.description.' + downgradeType);
-	    };
+	    if (opt.silent) {
+	      return '<p>An error occurred:</p><pre>' + escape$1(e.message + '', true) + '</pre>';
+	    }
 
+	    throw e;
+	  }
+	}
+	/**
+	 * Options
+	 */
 
-	    operation.annotation = function () {
-	        var suffix;
-	        if (downgradeType === 'building_address') {
-	            suffix = 'multiple';
-	        } else {
-	            suffix = downgradeType + '.' + multi;
-	        }
-	        return _t('operations.downgrade.annotation.' + suffix, { n: affectedFeatureCount});
-	    };
 
+	marked.options = marked.setOptions = function (opt) {
+	  merge(marked.defaults, opt);
+	  changeDefaults(marked.defaults);
+	  return marked;
+	};
 
-	    operation.id = 'downgrade';
-	    operation.keys = [uiCmd('⌘⌫'), uiCmd('⌘⌦'), uiCmd('⌦')];
-	    operation.title = _t('operations.downgrade.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	marked.getDefaults = getDefaults;
+	marked.defaults = defaults;
+	/**
+	 * Use Extension
+	 */
 
+	marked.use = function (extension) {
+	  var opts = merge({}, extension);
 
-	    return operation;
-	}
+	  if (extension.renderer) {
+	    (function () {
+	      var renderer = marked.defaults.renderer || new Renderer();
 
-	function operationExtract(context, selectedIDs) {
+	      var _loop = function _loop(prop) {
+	        var prevRenderer = renderer[prop];
 
-	    var _amount = selectedIDs.length === 1 ? 'single' : 'multiple';
-	    var _geometries = utilArrayUniq(selectedIDs.map(function(entityID) {
-	        return context.graph().hasEntity(entityID) && context.graph().geometry(entityID);
-	    }).filter(Boolean));
-	    var _geometryID = _geometries.length === 1 ? _geometries[0] : 'feature';
+	        renderer[prop] = function () {
+	          for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
+	            args[_key] = arguments[_key];
+	          }
 
-	    var _extent;
-	    var _actions = selectedIDs.map(function(entityID) {
-	        var graph = context.graph();
-	        var entity = graph.hasEntity(entityID);
-	        if (!entity || !entity.hasInterestingTags()) { return; }
+	          var ret = extension.renderer[prop].apply(renderer, args);
 
-	        if (entity.type === 'node' && graph.parentWays(entity).length === 0) { return; }
+	          if (ret === false) {
+	            ret = prevRenderer.apply(renderer, args);
+	          }
 
-	        if (entity.type !== 'node') {
-	            var preset = _mainPresetIndex.match(entity, graph);
-	            // only allow extraction from ways/relations if the preset supports points
-	            if (preset.geometry.indexOf('point') === -1) { return; }
-	        }
+	          return ret;
+	        };
+	      };
 
-	        _extent = _extent ? _extent.extend(entity.extent(graph)) : entity.extent(graph);
+	      for (var prop in extension.renderer) {
+	        _loop(prop);
+	      }
 
-	        return actionExtract(entityID);
-	    }).filter(Boolean);
+	      opts.renderer = renderer;
+	    })();
+	  }
 
+	  if (extension.tokenizer) {
+	    (function () {
+	      var tokenizer = marked.defaults.tokenizer || new Tokenizer();
 
-	    var operation = function () {
-	        var combinedAction = function(graph) {
-	            _actions.forEach(function(action) {
-	                graph = action(graph);
-	            });
-	            return graph;
-	        };
-	        context.perform(combinedAction, operation.annotation());  // do the extract
+	      var _loop2 = function _loop2(prop) {
+	        var prevTokenizer = tokenizer[prop];
 
-	        var extractedNodeIDs = _actions.map(function(action) {
-	            return action.getExtractedNodeID();
-	        });
-	        context.enter(modeSelect(context, extractedNodeIDs));
-	    };
+	        tokenizer[prop] = function () {
+	          for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
+	            args[_key2] = arguments[_key2];
+	          }
 
+	          var ret = extension.tokenizer[prop].apply(tokenizer, args);
 
-	    operation.available = function () {
-	        return _actions.length && selectedIDs.length === _actions.length;
-	    };
+	          if (ret === false) {
+	            ret = prevTokenizer.apply(tokenizer, args);
+	          }
 
+	          return ret;
+	        };
+	      };
 
-	    operation.disabled = function () {
+	      for (var prop in extension.tokenizer) {
+	        _loop2(prop);
+	      }
 
-	        if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        } else if (selectedIDs.some(function(entityID) {
-	            return context.graph().geometry(entityID) === 'vertex' && context.hasHiddenConnections(entityID);
-	        })) {
-	            return 'connected_to_hidden';
-	        }
+	      opts.tokenizer = tokenizer;
+	    })();
+	  }
 
-	        return false;
-	    };
+	  if (extension.walkTokens) {
+	    var walkTokens = marked.defaults.walkTokens;
 
+	    opts.walkTokens = function (token) {
+	      extension.walkTokens(token);
 
-	    operation.tooltip = function () {
-	        var disableReason = operation.disabled();
-	        if (disableReason) {
-	            return _t('operations.extract.' + disableReason + '.' + _amount);
-	        } else {
-	            return _t('operations.extract.description.' + _geometryID + '.' + _amount);
-	        }
+	      if (walkTokens) {
+	        walkTokens(token);
+	      }
 	    };
+	  }
 
-
-	    operation.annotation = function () {
-	        return _t('operations.extract.annotation.' + _amount, { n: selectedIDs.length });
-	    };
+	  marked.setOptions(opts);
+	};
+	/**
+	 * Run callback for every token
+	 */
 
 
-	    operation.id = 'extract';
-	    operation.keys = [_t('operations.extract.key')];
-	    operation.title = _t('operations.extract.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	marked.walkTokens = function (tokens, callback) {
+	  var _iterator = _createForOfIteratorHelper(tokens),
+	      _step;
 
+	  try {
+	    for (_iterator.s(); !(_step = _iterator.n()).done;) {
+	      var token = _step.value;
+	      callback(token);
 
-	    return operation;
-	}
+	      switch (token.type) {
+	        case 'table':
+	          {
+	            var _iterator2 = _createForOfIteratorHelper(token.tokens.header),
+	                _step2;
 
-	function operationMerge(context, selectedIDs) {
+	            try {
+	              for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
+	                var cell = _step2.value;
+	                marked.walkTokens(cell, callback);
+	              }
+	            } catch (err) {
+	              _iterator2.e(err);
+	            } finally {
+	              _iterator2.f();
+	            }
 
-	    var _action = getAction();
+	            var _iterator3 = _createForOfIteratorHelper(token.tokens.cells),
+	                _step3;
 
-	    function getAction() {
-	        // prefer a non-disabled action first
-	        var join = actionJoin(selectedIDs);
-	        if (!join.disabled(context.graph())) { return join; }
+	            try {
+	              for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
+	                var row = _step3.value;
 
-	        var merge = actionMerge(selectedIDs);
-	        if (!merge.disabled(context.graph())) { return merge; }
+	                var _iterator4 = _createForOfIteratorHelper(row),
+	                    _step4;
 
-	        var mergePolygon = actionMergePolygon(selectedIDs);
-	        if (!mergePolygon.disabled(context.graph())) { return mergePolygon; }
+	                try {
+	                  for (_iterator4.s(); !(_step4 = _iterator4.n()).done;) {
+	                    var _cell = _step4.value;
+	                    marked.walkTokens(_cell, callback);
+	                  }
+	                } catch (err) {
+	                  _iterator4.e(err);
+	                } finally {
+	                  _iterator4.f();
+	                }
+	              }
+	            } catch (err) {
+	              _iterator3.e(err);
+	            } finally {
+	              _iterator3.f();
+	            }
 
-	        var mergeNodes = actionMergeNodes(selectedIDs);
-	        if (!mergeNodes.disabled(context.graph())) { return mergeNodes; }
+	            break;
+	          }
 
-	        // otherwise prefer an action with an interesting disabled reason
-	        if (join.disabled(context.graph()) !== 'not_eligible') { return join; }
-	        if (merge.disabled(context.graph()) !== 'not_eligible') { return merge; }
-	        if (mergePolygon.disabled(context.graph()) !== 'not_eligible') { return mergePolygon; }
+	        case 'list':
+	          {
+	            marked.walkTokens(token.items, callback);
+	            break;
+	          }
 
-	        return mergeNodes;
+	        default:
+	          {
+	            if (token.tokens) {
+	              marked.walkTokens(token.tokens, callback);
+	            }
+	          }
+	      }
 	    }
+	  } catch (err) {
+	    _iterator.e(err);
+	  } finally {
+	    _iterator.f();
+	  }
+	};
+	/**
+	 * Parse Inline
+	 */
 
-	    var operation = function() {
 
-	        if (operation.disabled()) { return; }
+	marked.parseInline = function (src, opt) {
+	  // throw error in case of non string input
+	  if (typeof src === 'undefined' || src === null) {
+	    throw new Error('marked.parseInline(): input parameter is undefined or null');
+	  }
 
-	        context.perform(_action, operation.annotation());
+	  if (typeof src !== 'string') {
+	    throw new Error('marked.parseInline(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
+	  }
 
-	        context.validator().validate();
+	  opt = merge({}, marked.defaults, opt || {});
+	  checkSanitizeDeprecation(opt);
 
-	        var resultIDs = selectedIDs.filter(context.hasEntity);
-	        if (resultIDs.length > 1) {
-	            var interestingIDs = resultIDs.filter(function(id) {
-	                return context.entity(id).hasInterestingTags();
-	            });
-	            if (interestingIDs.length) { resultIDs = interestingIDs; }
-	        }
-	        context.enter(modeSelect(context, resultIDs));
-	    };
+	  try {
+	    var tokens = Lexer.lexInline(src, opt);
 
-	    operation.available = function() {
-	        return selectedIDs.length >= 2;
-	    };
+	    if (opt.walkTokens) {
+	      marked.walkTokens(tokens, opt.walkTokens);
+	    }
 
-	    operation.disabled = function() {
-	        var actionDisabled = _action.disabled(context.graph());
-	        if (actionDisabled) { return actionDisabled; }
+	    return Parser.parseInline(tokens, opt);
+	  } catch (e) {
+	    e.message += '\nPlease report this to https://github.com/markedjs/marked.';
 
-	        var osm = context.connection();
-	        if (osm &&
-	            _action.resultingWayNodesLength &&
-	            _action.resultingWayNodesLength(context.graph()) > osm.maxWayNodes()) {
-	            return 'too_many_vertices';
-	        }
+	    if (opt.silent) {
+	      return '<p>An error occurred:</p><pre>' + escape$1(e.message + '', true) + '</pre>';
+	    }
 
-	        return false;
-	    };
+	    throw e;
+	  }
+	};
+	/**
+	 * Expose
+	 */
 
-	    operation.tooltip = function() {
-	        var disabled = operation.disabled();
-	        if (disabled) {
-	            if (disabled === 'restriction') {
-	                return _t('operations.merge.restriction',
-	                    { relation: _mainPresetIndex.item('type/restriction').name() });
-	            }
-	            return _t('operations.merge.' + disabled);
-	        }
-	        return _t('operations.merge.description');
-	    };
 
-	    operation.annotation = function() {
-	        return _t('operations.merge.annotation', { n: selectedIDs.length });
-	    };
+	marked.Parser = Parser;
+	marked.parser = Parser.parse;
+	marked.Renderer = Renderer;
+	marked.TextRenderer = TextRenderer;
+	marked.Lexer = Lexer;
+	marked.lexer = Lexer.lex;
+	marked.Tokenizer = Tokenizer;
+	marked.Slugger = Slugger;
+	marked.parse = marked;
+	var marked_1 = marked;
 
-	    operation.id = 'merge';
-	    operation.keys = [_t('operations.merge.key')];
-	    operation.title = _t('operations.merge.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	var tiler$4 = utilTiler();
+	var dispatch$5 = dispatch$8('loaded');
+	var _tileZoom$1 = 14;
+	var _osmoseUrlRoot = 'https://osmose.openstreetmap.fr/api/0.3';
+	var _osmoseData = {
+	  icons: {},
+	  items: []
+	}; // This gets reassigned if reset
 
-	    return operation;
-	}
+	var _cache;
 
-	// see also `behaviorPaste`
-	function operationPaste(context) {
+	function abortRequest$4(controller) {
+	  if (controller) {
+	    controller.abort();
+	  }
+	}
 
-	    var _pastePoint;
+	function abortUnwantedRequests$1(cache, tiles) {
+	  Object.keys(cache.inflightTile).forEach(function (k) {
+	    var wanted = tiles.find(function (tile) {
+	      return k === tile.id;
+	    });
 
-	    var operation = function() {
+	    if (!wanted) {
+	      abortRequest$4(cache.inflightTile[k]);
+	      delete cache.inflightTile[k];
+	    }
+	  });
+	}
 
-	        if (!_pastePoint) { return; }
+	function encodeIssueRtree(d) {
+	  return {
+	    minX: d.loc[0],
+	    minY: d.loc[1],
+	    maxX: d.loc[0],
+	    maxY: d.loc[1],
+	    data: d
+	  };
+	} // Replace or remove QAItem from rtree
 
-	        var oldIDs = context.copyIDs();
-	        if (!oldIDs.length) { return; }
 
-	        var projection = context.projection;
-	        var extent = geoExtent();
-	        var oldGraph = context.copyGraph();
-	        var newIDs = [];
+	function updateRtree$1(item, replace) {
+	  _cache.rtree.remove(item, function (a, b) {
+	    return a.data.id === b.data.id;
+	  });
 
-	        var action = actionCopyEntities(oldIDs, oldGraph);
-	        context.perform(action);
+	  if (replace) {
+	    _cache.rtree.insert(item);
+	  }
+	} // Issues shouldn't obscure each other
 
-	        var copies = action.copies();
-	        var originals = new Set();
-	        Object.values(copies).forEach(function(entity) { originals.add(entity.id); });
 
-	        for (var id in copies) {
-	            var oldEntity = oldGraph.entity(id);
-	            var newEntity = copies[id];
+	function preventCoincident(loc) {
+	  var coincident = false;
 
-	            extent._extend(oldEntity.extent(oldGraph));
+	  do {
+	    // first time, move marker up. after that, move marker right.
+	    var delta = coincident ? [0.00001, 0] : [0, 0.00001];
+	    loc = geoVecAdd(loc, delta);
+	    var bbox = geoExtent(loc).bbox();
+	    coincident = _cache.rtree.search(bbox).length;
+	  } while (coincident);
 
-	            // Exclude child nodes from newIDs if their parent way was also copied.
-	            var parents = context.graph().parentWays(newEntity);
-	            var parentCopied = parents.some(function(parent) {
-	                return originals.has(parent.id);
-	            });
+	  return loc;
+	}
 
-	            if (!parentCopied) {
-	                newIDs.push(newEntity.id);
-	            }
-	        }
+	var serviceOsmose = {
+	  title: 'osmose',
+	  init: function init() {
+	    _mainFileFetcher.get('qa_data').then(function (d) {
+	      _osmoseData = d.osmose;
+	      _osmoseData.items = Object.keys(d.osmose.icons).map(function (s) {
+	        return s.split('-')[0];
+	      }).reduce(function (unique, item) {
+	        return unique.indexOf(item) !== -1 ? unique : [].concat(_toConsumableArray(unique), [item]);
+	      }, []);
+	    });
 
-	        // Use the location of the copy operation to offset the paste location,
-	        // or else use the center of the pasted extent
-	        var copyPoint = (context.copyLonLat() && projection(context.copyLonLat())) ||
-	            projection(extent.center());
-	        var delta = geoVecSubtract(_pastePoint, copyPoint);
+	    if (!_cache) {
+	      this.reset();
+	    }
 
-	        // Move the pasted objects to be anchored at the paste location
-	        context.replace(actionMove(newIDs, delta, projection), operation.annotation());
-	        context.enter(modeSelect(context, newIDs));
-	    };
+	    this.event = utilRebind(this, dispatch$5, 'on');
+	  },
+	  reset: function reset() {
+	    var _strings = {};
+	    var _colors = {};
 
-	    operation.point = function(val) {
-	        _pastePoint = val;
-	        return operation;
-	    };
+	    if (_cache) {
+	      Object.values(_cache.inflightTile).forEach(abortRequest$4); // Strings and colors are static and should not be re-populated
 
-	    operation.available = function() {
-	        return context.mode().id === 'browse';
-	    };
+	      _strings = _cache.strings;
+	      _colors = _cache.colors;
+	    }
 
-	    operation.disabled = function() {
-	        return !context.copyIDs().length;
+	    _cache = {
+	      data: {},
+	      loadedTile: {},
+	      inflightTile: {},
+	      inflightPost: {},
+	      closed: {},
+	      rtree: new RBush(),
+	      strings: _strings,
+	      colors: _colors
 	    };
+	  },
+	  loadIssues: function loadIssues(projection) {
+	    var _this = this;
 
-	    operation.tooltip = function() {
-	        var oldGraph = context.copyGraph();
-	        var ids = context.copyIDs();
-	        if (!ids.length) {
-	            return _t('operations.paste.nothing_copied');
-	        }
-	        return ids.length === 1 ?
-	            _t('operations.paste.description.single', { feature: utilDisplayLabel(oldGraph.entity(ids[0]), oldGraph) }) :
-	            _t('operations.paste.description.multiple', { n: ids.length.toString() });
-	    };
+	    var params = {
+	      // Tiles return a maximum # of issues
+	      // So we want to filter our request for only types iD supports
+	      item: _osmoseData.items
+	    }; // determine the needed tiles to cover the view
 
-	    operation.annotation = function() {
-	        var ids = context.copyIDs();
-	        return ids.length === 1 ?
-	            _t('operations.paste.annotation.single') :
-	            _t('operations.paste.annotation.multiple', { n: ids.length.toString() });
-	    };
+	    var tiles = tiler$4.zoomExtent([_tileZoom$1, _tileZoom$1]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	    operation.id = 'paste';
-	    operation.keys = [uiCmd('⌘V')];
-	    operation.title = _t('operations.paste.title');
+	    abortUnwantedRequests$1(_cache, tiles); // issue new requests..
 
-	    return operation;
-	}
+	    tiles.forEach(function (tile) {
+	      if (_cache.loadedTile[tile.id] || _cache.inflightTile[tile.id]) return;
 
-	function operationReverse(context, selectedIDs) {
+	      var _tile$xyz = _slicedToArray(tile.xyz, 3),
+	          x = _tile$xyz[0],
+	          y = _tile$xyz[1],
+	          z = _tile$xyz[2];
 
-	    var operation = function() {
-	        context.perform(function combinedReverseAction(graph) {
-	            actions().forEach(function(action) {
-	                graph = action(graph);
-	            });
-	            return graph;
-	        }, operation.annotation());
-	        context.validator().validate();
-	    };
+	      var url = "".concat(_osmoseUrlRoot, "/issues/").concat(z, "/").concat(x, "/").concat(y, ".json?") + utilQsString(params);
+	      var controller = new AbortController();
+	      _cache.inflightTile[tile.id] = controller;
+	      d3_json(url, {
+	        signal: controller.signal
+	      }).then(function (data) {
+	        delete _cache.inflightTile[tile.id];
+	        _cache.loadedTile[tile.id] = true;
+
+	        if (data.features) {
+	          data.features.forEach(function (issue) {
+	            var _issue$properties = issue.properties,
+	                item = _issue$properties.item,
+	                cl = _issue$properties["class"],
+	                id = _issue$properties.uuid;
+	            /* Osmose issues are uniquely identified by a unique
+	              `item` and `class` combination (both integer values) */
+
+	            var itemType = "".concat(item, "-").concat(cl); // Filter out unsupported issue types (some are too specific or advanced)
+
+	            if (itemType in _osmoseData.icons) {
+	              var loc = issue.geometry.coordinates; // lon, lat
+
+	              loc = preventCoincident(loc);
+	              var d = new QAItem(loc, _this, itemType, id, {
+	                item: item
+	              }); // Setting elems here prevents UI detail requests
+
+	              if (item === 8300 || item === 8360) {
+	                d.elems = [];
+	              }
 
-	    function actions(situation) {
-	        return selectedIDs.map(function(entityID) {
-	            var entity = context.hasEntity(entityID);
-	            if (!entity) { return; }
+	              _cache.data[d.id] = d;
 
-	            if (situation === 'toolbar') {
-	                if (entity.type === 'way' &&
-	                    (!entity.isOneWay() && !entity.isSided())) { return; }
+	              _cache.rtree.insert(encodeIssueRtree(d));
 	            }
+	          });
+	        }
 
-	            var geometry = entity.geometry(context.graph());
-	            if (entity.type !== 'node' && geometry !== 'line') { return; }
-
-	            var action = actionReverse(entityID);
-	            if (action.disabled(context.graph())) { return; }
-
-	            return action;
-	        }).filter(Boolean);
-	    }
+	        dispatch$5.call('loaded');
+	      })["catch"](function () {
+	        delete _cache.inflightTile[tile.id];
+	        _cache.loadedTile[tile.id] = true;
+	      });
+	    });
+	  },
+	  loadIssueDetail: function loadIssueDetail(issue) {
+	    var _this2 = this;
 
-	    function reverseTypeID() {
-	        var acts = actions();
-	        var nodeActionCount = acts.filter(function(act) {
-	            var entity = context.hasEntity(act.entityID());
-	            return entity && entity.type === 'node';
-	        }).length;
-	        var typeID = nodeActionCount === 0 ? 'line' : (nodeActionCount === acts.length ? 'point' : 'features');
-	        if (typeID !== 'features' && acts.length > 1) { typeID += 's'; }
-	        return typeID;
+	    // Issue details only need to be fetched once
+	    if (issue.elems !== undefined) {
+	      return Promise.resolve(issue);
 	    }
 
+	    var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "?langs=").concat(_mainLocalizer.localeCode());
 
-	    operation.available = function(situation) {
-	        return actions(situation).length > 0;
-	    };
+	    var cacheDetails = function cacheDetails(data) {
+	      // Associated elements used for highlighting
+	      // Assign directly for immediate use in the callback
+	      issue.elems = data.elems.map(function (e) {
+	        return e.type.substring(0, 1) + e.id;
+	      }); // Some issues have instance specific detail in a subtitle
 
+	      issue.detail = data.subtitle ? marked_1(data.subtitle.auto) : '';
 
-	    operation.disabled = function() {
-	        return false;
+	      _this2.replaceItem(issue);
 	    };
 
+	    return d3_json(url).then(cacheDetails).then(function () {
+	      return issue;
+	    });
+	  },
+	  loadStrings: function loadStrings() {
+	    var locale = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : _mainLocalizer.localeCode();
+	    var items = Object.keys(_osmoseData.icons);
 
-	    operation.tooltip = function() {
-	        return _t('operations.reverse.description.' + reverseTypeID());
-	    };
-
+	    if (locale in _cache.strings && Object.keys(_cache.strings[locale]).length === items.length) {
+	      return Promise.resolve(_cache.strings[locale]);
+	    } // May be partially populated already if some requests were successful
 
-	    operation.annotation = function() {
-	        return _t('operations.reverse.annotation.' + reverseTypeID());
-	    };
 
+	    if (!(locale in _cache.strings)) {
+	      _cache.strings[locale] = {};
+	    } // Only need to cache strings for supported issue types
+	    // Using multiple individual item + class requests to reduce fetched data size
 
-	    operation.id = 'reverse';
-	    operation.keys = [_t('operations.reverse.key')];
-	    operation.title = _t('operations.reverse.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
 
-	    return operation;
-	}
+	    var allRequests = items.map(function (itemType) {
+	      // No need to request data we already have
+	      if (itemType in _cache.strings[locale]) return null;
 
-	function operationSplit(context, selectedIDs) {
-	    var vertices = selectedIDs
-	        .filter(function(id) { return context.graph().geometry(id) === 'vertex'; });
-	    var entityID = vertices[0];
-	    var action = actionSplit(entityID);
-	    var ways = [];
+	      var cacheData = function cacheData(data) {
+	        // Bunch of nested single value arrays of objects
+	        var _data$categories = _slicedToArray(data.categories, 1),
+	            _data$categories$ = _data$categories[0],
+	            cat = _data$categories$ === void 0 ? {
+	          items: []
+	        } : _data$categories$;
 
-	    if (vertices.length === 1) {
-	        if (entityID && selectedIDs.length > 1) {
-	            var ids = selectedIDs.filter(function(id) { return id !== entityID; });
-	            action.limitWays(ids);
-	        }
-	        ways = action.ways(context.graph());
-	    }
+	        var _cat$items = _slicedToArray(cat.items, 1),
+	            _cat$items$ = _cat$items[0],
+	            item = _cat$items$ === void 0 ? {
+	          "class": []
+	        } : _cat$items$;
 
+	        var _item$class = _slicedToArray(item["class"], 1),
+	            _item$class$ = _item$class[0],
+	            cl = _item$class$ === void 0 ? null : _item$class$; // If null default value is reached, data wasn't as expected (or was empty)
 
-	    var operation = function() {
-	        var difference = context.perform(action, operation.annotation());
-	        context.enter(modeSelect(context, difference.extantIDs()));
-	    };
 
+	        if (!cl) {
+	          /* eslint-disable no-console */
+	          console.log("Osmose strings request (".concat(itemType, ") had unexpected data"));
+	          /* eslint-enable no-console */
 
-	    operation.available = function() {
-	        return vertices.length === 1;
-	    };
+	          return;
+	        } // Cache served item colors to automatically style issue markers later
 
 
-	    operation.disabled = function() {
-	        var reason = action.disabled(context.graph());
-	        if (reason) {
-	            return reason;
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        }
+	        var itemInt = item.item,
+	            color = item.color;
 
-	        return false;
-	    };
+	        if (/^#[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3}/.test(color)) {
+	          _cache.colors[itemInt] = color;
+	        } // Value of root key will be null if no string exists
+	        // If string exists, value is an object with key 'auto' for string
 
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        if (disable) {
-	            return _t('operations.split.' + disable);
-	        } else if (ways.length === 1) {
-	            return _t('operations.split.description.' + context.graph().geometry(ways[0].id));
-	        } else {
-	            return _t('operations.split.description.multiple');
-	        }
-	    };
+	        var title = cl.title,
+	            detail = cl.detail,
+	            fix = cl.fix,
+	            trap = cl.trap; // Osmose titles shouldn't contain markdown
 
+	        var issueStrings = {};
+	        if (title) issueStrings.title = title.auto;
+	        if (detail) issueStrings.detail = marked_1(detail.auto);
+	        if (trap) issueStrings.trap = marked_1(trap.auto);
+	        if (fix) issueStrings.fix = marked_1(fix.auto);
+	        _cache.strings[locale][itemType] = issueStrings;
+	      };
 
-	    operation.annotation = function() {
-	        return ways.length === 1 ?
-	            _t('operations.split.annotation.' + context.graph().geometry(ways[0].id)) :
-	            _t('operations.split.annotation.multiple', { n: ways.length });
-	    };
+	      var _itemType$split = itemType.split('-'),
+	          _itemType$split2 = _slicedToArray(_itemType$split, 2),
+	          item = _itemType$split2[0],
+	          cl = _itemType$split2[1]; // Osmose API falls back to English strings where untranslated or if locale doesn't exist
 
 
-	    operation.id = 'split';
-	    operation.keys = [_t('operations.split.key')];
-	    operation.title = _t('operations.split.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	      var url = "".concat(_osmoseUrlRoot, "/items/").concat(item, "/class/").concat(cl, "?langs=").concat(locale);
+	      return d3_json(url).then(cacheData);
+	    }).filter(Boolean);
+	    return Promise.all(allRequests).then(function () {
+	      return _cache.strings[locale];
+	    });
+	  },
+	  getStrings: function getStrings(itemType) {
+	    var locale = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : _mainLocalizer.localeCode();
+	    // No need to fallback to English, Osmose API handles this for us
+	    return locale in _cache.strings ? _cache.strings[locale][itemType] : {};
+	  },
+	  getColor: function getColor(itemType) {
+	    return itemType in _cache.colors ? _cache.colors[itemType] : '#FFFFFF';
+	  },
+	  postUpdate: function postUpdate(issue, callback) {
+	    var _this3 = this;
 
-	    return operation;
-	}
+	    if (_cache.inflightPost[issue.id]) {
+	      return callback({
+	        message: 'Issue update already inflight',
+	        status: -2
+	      }, issue);
+	    } // UI sets the status to either 'done' or 'false'
 
-	function operationStraighten(context, selectedIDs) {
-	    var _wayIDs = selectedIDs.filter(function(id) { return id.charAt(0) === 'w'; });
-	    var _nodeIDs = selectedIDs.filter(function(id) { return id.charAt(0) === 'n'; });
-	    var _amount = ((_wayIDs.length ? _wayIDs : _nodeIDs).length === 1 ? 'single' : 'multiple');
-
-	    var _nodes = utilGetAllNodes(selectedIDs, context.graph());
-	    var _coords = _nodes.map(function(n) { return n.loc; });
-	    var _extent = utilTotalExtent(selectedIDs, context.graph());
-	    var _action = chooseAction();
-	    var _geometry;
-
-
-	    function chooseAction() {
-	        // straighten selected nodes
-	        if (_wayIDs.length === 0 && _nodeIDs.length > 2) {
-	            _geometry = 'points';
-	            return actionStraightenNodes(_nodeIDs, context.projection);
-
-	        // straighten selected ways (possibly between range of 2 selected nodes)
-	        } else if (_wayIDs.length > 0 && (_nodeIDs.length === 0 || _nodeIDs.length === 2)) {
-	            var startNodeIDs = [];
-	            var endNodeIDs = [];
-
-	            for (var i = 0; i < selectedIDs.length; i++) {
-	                var entity = context.entity(selectedIDs[i]);
-	                if (entity.type === 'node') {
-	                    continue;
-	                } else if (entity.type !== 'way' || entity.isClosed()) {
-	                    return null;  // exit early, can't straighten these
-	                }
 
-	                startNodeIDs.push(entity.first());
-	                endNodeIDs.push(entity.last());
-	            }
+	    var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "/").concat(issue.newStatus);
+	    var controller = new AbortController();
 
-	            // Remove duplicate end/startNodeIDs (duplicate nodes cannot be at the line end)
-	            startNodeIDs = startNodeIDs.filter(function(n) {
-	                return startNodeIDs.indexOf(n) === startNodeIDs.lastIndexOf(n);
-	            });
-	            endNodeIDs = endNodeIDs.filter(function(n) {
-	                return endNodeIDs.indexOf(n) === endNodeIDs.lastIndexOf(n);
-	            });
+	    var after = function after() {
+	      delete _cache.inflightPost[issue.id];
 
-	            // Ensure all ways are connected (i.e. only 2 unique endpoints/startpoints)
-	            if (utilArrayDifference(startNodeIDs, endNodeIDs).length +
-	                utilArrayDifference(endNodeIDs, startNodeIDs).length !== 2) { return null; }
+	      _this3.removeItem(issue);
 
-	            // Ensure path contains at least 3 unique nodes
-	            var wayNodeIDs = utilGetAllNodes(_wayIDs, context.graph())
-	                .map(function(node) { return node.id; });
-	            if (wayNodeIDs.length <= 2) { return null; }
+	      if (issue.newStatus === 'done') {
+	        // Keep track of the number of issues closed per `item` to tag the changeset
+	        if (!(issue.item in _cache.closed)) {
+	          _cache.closed[issue.item] = 0;
+	        }
 
-	            // If range of 2 selected nodes is supplied, ensure nodes lie on the selected path
-	            if (_nodeIDs.length === 2 && (
-	                wayNodeIDs.indexOf(_nodeIDs[0]) === -1 || wayNodeIDs.indexOf(_nodeIDs[1]) === -1
-	            )) { return null; }
+	        _cache.closed[issue.item] += 1;
+	      }
 
-	            if (_nodeIDs.length) {
-	                // If we're only straightenting between two points, we only need that extent visible
-	                _extent = utilTotalExtent(_nodeIDs, context.graph());
-	            }
+	      if (callback) callback(null, issue);
+	    };
 
-	            _geometry = _wayIDs.length === 1 ? 'line' : 'lines';
-	            return actionStraightenWay(selectedIDs, context.projection);
-	        }
+	    _cache.inflightPost[issue.id] = controller;
+	    fetch(url, {
+	      signal: controller.signal
+	    }).then(after)["catch"](function (err) {
+	      delete _cache.inflightPost[issue.id];
+	      if (callback) callback(err.message);
+	    });
+	  },
+	  // Get all cached QAItems covering the viewport
+	  getItems: function getItems(projection) {
+	    var viewport = projection.clipExtent();
+	    var min = [viewport[0][0], viewport[1][1]];
+	    var max = [viewport[1][0], viewport[0][1]];
+	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	    return _cache.rtree.search(bbox).map(function (d) {
+	      return d.data;
+	    });
+	  },
+	  // Get a QAItem from cache
+	  // NOTE: Don't change method name until UI v3 is merged
+	  getError: function getError(id) {
+	    return _cache.data[id];
+	  },
+	  // get the name of the icon to display for this item
+	  getIcon: function getIcon(itemType) {
+	    return _osmoseData.icons[itemType];
+	  },
+	  // Replace a single QAItem in the cache
+	  replaceItem: function replaceItem(item) {
+	    if (!(item instanceof QAItem) || !item.id) return;
+	    _cache.data[item.id] = item;
+	    updateRtree$1(encodeIssueRtree(item), true); // true = replace
 
-	        return null;
-	    }
+	    return item;
+	  },
+	  // Remove a single QAItem from the cache
+	  removeItem: function removeItem(item) {
+	    if (!(item instanceof QAItem) || !item.id) return;
+	    delete _cache.data[item.id];
+	    updateRtree$1(encodeIssueRtree(item), false); // false = remove
+	  },
+	  // Used to populate `closed:osmose:*` changeset tags
+	  getClosedCounts: function getClosedCounts() {
+	    return _cache.closed;
+	  },
+	  itemURL: function itemURL(item) {
+	    return "https://osmose.openstreetmap.fr/en/error/".concat(item.id);
+	  }
+	};
 
+	var ieee754$1 = {};
 
-	    function operation() {
-	        if (!_action) { return; }
+	/*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */
 
-	        context.perform(_action, operation.annotation());
+	ieee754$1.read = function (buffer, offset, isLE, mLen, nBytes) {
+	  var e, m;
+	  var eLen = nBytes * 8 - mLen - 1;
+	  var eMax = (1 << eLen) - 1;
+	  var eBias = eMax >> 1;
+	  var nBits = -7;
+	  var i = isLE ? nBytes - 1 : 0;
+	  var d = isLE ? -1 : 1;
+	  var s = buffer[offset + i];
+	  i += d;
+	  e = s & (1 << -nBits) - 1;
+	  s >>= -nBits;
+	  nBits += eLen;
 
-	        window.setTimeout(function() {
-	            context.validator().validate();
-	        }, 300);  // after any transition
-	    }
+	  for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}
 
+	  m = e & (1 << -nBits) - 1;
+	  e >>= -nBits;
+	  nBits += mLen;
 
-	    operation.available = function() {
-	        return Boolean(_action);
-	    };
+	  for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}
 
+	  if (e === 0) {
+	    e = 1 - eBias;
+	  } else if (e === eMax) {
+	    return m ? NaN : (s ? -1 : 1) * Infinity;
+	  } else {
+	    m = m + Math.pow(2, mLen);
+	    e = e - eBias;
+	  }
 
-	    operation.disabled = function() {
-	        var reason = _action.disabled(context.graph());
-	        if (reason) {
-	            return reason;
-	        } else if (_extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        } else if (someMissing()) {
-	            return 'not_downloaded';
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        }
+	  return (s ? -1 : 1) * m * Math.pow(2, e - mLen);
+	};
 
-	        return false;
+	ieee754$1.write = function (buffer, value, offset, isLE, mLen, nBytes) {
+	  var e, m, c;
+	  var eLen = nBytes * 8 - mLen - 1;
+	  var eMax = (1 << eLen) - 1;
+	  var eBias = eMax >> 1;
+	  var rt = mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0;
+	  var i = isLE ? 0 : nBytes - 1;
+	  var d = isLE ? 1 : -1;
+	  var s = value < 0 || value === 0 && 1 / value < 0 ? 1 : 0;
+	  value = Math.abs(value);
 
+	  if (isNaN(value) || value === Infinity) {
+	    m = isNaN(value) ? 1 : 0;
+	    e = eMax;
+	  } else {
+	    e = Math.floor(Math.log(value) / Math.LN2);
 
-	        function someMissing() {
-	            if (context.inIntro()) { return false; }
-	            var osm = context.connection();
-	            if (osm) {
-	                var missing = _coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-	                if (missing.length) {
-	                    missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
-	    };
+	    if (value * (c = Math.pow(2, -e)) < 1) {
+	      e--;
+	      c *= 2;
+	    }
 
+	    if (e + eBias >= 1) {
+	      value += rt / c;
+	    } else {
+	      value += rt * Math.pow(2, 1 - eBias);
+	    }
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.straighten.' + disable + '.' + _amount) :
-	            _t('operations.straighten.description.' + _geometry);
-	    };
+	    if (value * c >= 2) {
+	      e++;
+	      c /= 2;
+	    }
 
+	    if (e + eBias >= eMax) {
+	      m = 0;
+	      e = eMax;
+	    } else if (e + eBias >= 1) {
+	      m = (value * c - 1) * Math.pow(2, mLen);
+	      e = e + eBias;
+	    } else {
+	      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen);
+	      e = 0;
+	    }
+	  }
 
-	    operation.annotation = function() {
-	        return _t('operations.straighten.annotation.' + _geometry);
-	    };
+	  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
 
+	  e = e << mLen | m;
+	  eLen += mLen;
 
-	    operation.id = 'straighten';
-	    operation.keys = [_t('operations.straighten.key')];
-	    operation.title = _t('operations.straighten.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
 
-	    return operation;
-	}
+	  buffer[offset + i - d] |= s * 128;
+	};
 
-	var Operations = /*#__PURE__*/Object.freeze({
-		__proto__: null,
-		operationCircularize: operationCircularize,
-		operationContinue: operationContinue,
-		operationCopy: operationCopy,
-		operationDelete: operationDelete,
-		operationDisconnect: operationDisconnect,
-		operationDowngrade: operationDowngrade,
-		operationExtract: operationExtract,
-		operationMerge: operationMerge,
-		operationMove: operationMove,
-		operationOrthogonalize: operationOrthogonalize,
-		operationPaste: operationPaste,
-		operationReflectShort: operationReflectShort,
-		operationReflectLong: operationReflectLong,
-		operationReverse: operationReverse,
-		operationRotate: operationRotate,
-		operationSplit: operationSplit,
-		operationStraighten: operationStraighten
-	});
+	var pbf = Pbf;
+	var ieee754 = ieee754$1;
 
-	var _relatedParent;
+	function Pbf(buf) {
+	  this.buf = ArrayBuffer.isView && ArrayBuffer.isView(buf) ? buf : new Uint8Array(buf || 0);
+	  this.pos = 0;
+	  this.type = 0;
+	  this.length = this.buf.length;
+	}
 
+	Pbf.Varint = 0; // varint: int32, int64, uint32, uint64, sint32, sint64, bool, enum
 
-	function modeSelect(context, selectedIDs) {
-	    var mode = {
-	        id: 'select',
-	        button: 'browse'
-	    };
+	Pbf.Fixed64 = 1; // 64-bit: double, fixed64, sfixed64
 
-	    var keybinding = utilKeybinding('select');
+	Pbf.Bytes = 2; // length-delimited: string, bytes, embedded messages, packed repeated fields
 
-	    var _breatheBehavior = behaviorBreathe();
-	    var _modeDragNode = modeDragNode(context);
-	    var _selectBehavior;
-	    var _behaviors = [];
+	Pbf.Fixed32 = 5; // 32-bit: float, fixed32, sfixed32
 
-	    var _operations = [];
-	    var _newFeature = false;
-	    var _follow = false;
+	var SHIFT_LEFT_32 = (1 << 16) * (1 << 16),
+	    SHIFT_RIGHT_32 = 1 / SHIFT_LEFT_32; // Threshold chosen based on both benchmarking and knowledge about browser string
+	// data structures (which currently switch structure types at 12 bytes or more)
 
+	var TEXT_DECODER_MIN_LENGTH = 12;
+	var utf8TextDecoder = typeof TextDecoder === 'undefined' ? null : new TextDecoder('utf8');
+	Pbf.prototype = {
+	  destroy: function destroy() {
+	    this.buf = null;
+	  },
+	  // === READING =================================================================
+	  readFields: function readFields(readField, result, end) {
+	    end = end || this.length;
 
-	    function singular() {
-	        if (selectedIDs && selectedIDs.length === 1) {
-	            return context.hasEntity(selectedIDs[0]);
-	        }
+	    while (this.pos < end) {
+	      var val = this.readVarint(),
+	          tag = val >> 3,
+	          startPos = this.pos;
+	      this.type = val & 0x7;
+	      readField(tag, result, this);
+	      if (this.pos === startPos) this.skip(val);
 	    }
 
-	    function selectedEntities() {
-	        return selectedIDs.map(function(id) {
-	            return context.hasEntity(id);
-	        }).filter(Boolean);
-	    }
+	    return result;
+	  },
+	  readMessage: function readMessage(readField, result) {
+	    return this.readFields(readField, result, this.readVarint() + this.pos);
+	  },
+	  readFixed32: function readFixed32() {
+	    var val = readUInt32(this.buf, this.pos);
+	    this.pos += 4;
+	    return val;
+	  },
+	  readSFixed32: function readSFixed32() {
+	    var val = readInt32(this.buf, this.pos);
+	    this.pos += 4;
+	    return val;
+	  },
+	  // 64-bit int handling is based on github.com/dpw/node-buffer-more-ints (MIT-licensed)
+	  readFixed64: function readFixed64() {
+	    var val = readUInt32(this.buf, this.pos) + readUInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
+	    this.pos += 8;
+	    return val;
+	  },
+	  readSFixed64: function readSFixed64() {
+	    var val = readUInt32(this.buf, this.pos) + readInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
+	    this.pos += 8;
+	    return val;
+	  },
+	  readFloat: function readFloat() {
+	    var val = ieee754.read(this.buf, this.pos, true, 23, 4);
+	    this.pos += 4;
+	    return val;
+	  },
+	  readDouble: function readDouble() {
+	    var val = ieee754.read(this.buf, this.pos, true, 52, 8);
+	    this.pos += 8;
+	    return val;
+	  },
+	  readVarint: function readVarint(isSigned) {
+	    var buf = this.buf,
+	        val,
+	        b;
+	    b = buf[this.pos++];
+	    val = b & 0x7f;
+	    if (b < 0x80) return val;
+	    b = buf[this.pos++];
+	    val |= (b & 0x7f) << 7;
+	    if (b < 0x80) return val;
+	    b = buf[this.pos++];
+	    val |= (b & 0x7f) << 14;
+	    if (b < 0x80) return val;
+	    b = buf[this.pos++];
+	    val |= (b & 0x7f) << 21;
+	    if (b < 0x80) return val;
+	    b = buf[this.pos];
+	    val |= (b & 0x0f) << 28;
+	    return readVarintRemainder(val, isSigned, this);
+	  },
+	  readVarint64: function readVarint64() {
+	    // for compatibility with v2.0.1
+	    return this.readVarint(true);
+	  },
+	  readSVarint: function readSVarint() {
+	    var num = this.readVarint();
+	    return num % 2 === 1 ? (num + 1) / -2 : num / 2; // zigzag encoding
+	  },
+	  readBoolean: function readBoolean() {
+	    return Boolean(this.readVarint());
+	  },
+	  readString: function readString() {
+	    var end = this.readVarint() + this.pos;
+	    var pos = this.pos;
+	    this.pos = end;
 
+	    if (end - pos >= TEXT_DECODER_MIN_LENGTH && utf8TextDecoder) {
+	      // longer strings are fast with the built-in browser TextDecoder API
+	      return readUtf8TextDecoder(this.buf, pos, end);
+	    } // short strings are fast with our custom implementation
 
-	    function checkSelectedIDs() {
-	        var ids = [];
-	        if (Array.isArray(selectedIDs)) {
-	            ids = selectedIDs.filter(function(id) {
-	                return context.hasEntity(id);
-	            });
-	        }
 
-	        if (!ids.length) {
-	            context.enter(modeBrowse(context));
-	            return false;
-	        } else if ((selectedIDs.length > 1 && ids.length === 1) ||
-	            (selectedIDs.length === 1 && ids.length > 1)) {
-	            // switch between single- and multi-select UI
-	            context.enter(modeSelect(context, ids));
-	            return false;
-	        }
+	    return readUtf8(this.buf, pos, end);
+	  },
+	  readBytes: function readBytes() {
+	    var end = this.readVarint() + this.pos,
+	        buffer = this.buf.subarray(this.pos, end);
+	    this.pos = end;
+	    return buffer;
+	  },
+	  // verbose for performance reasons; doesn't affect gzipped size
+	  readPackedVarint: function readPackedVarint(arr, isSigned) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readVarint(isSigned));
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	        selectedIDs = ids;
-	        return true;
+	    while (this.pos < end) {
+	      arr.push(this.readVarint(isSigned));
 	    }
 
+	    return arr;
+	  },
+	  readPackedSVarint: function readPackedSVarint(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readSVarint());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	    // find the common parent ways for nextVertex, previousVertex
-	    function commonParents() {
-	        var graph = context.graph();
-	        var commonParents = [];
-
-	        for (var i = 0; i < selectedIDs.length; i++) {
-	            var entity = context.hasEntity(selectedIDs[i]);
-	            if (!entity || entity.geometry(graph) !== 'vertex') {
-	                return [];  // selection includes some not vertices
-	            }
-
-	            var currParents = graph.parentWays(entity).map(function(w) { return w.id; });
-	            if (!commonParents.length) {
-	                commonParents = currParents;
-	                continue;
-	            }
-
-	            commonParents = utilArrayIntersection(commonParents, currParents);
-	            if (!commonParents.length) {
-	                return [];
-	            }
-	        }
-
-	        return commonParents;
+	    while (this.pos < end) {
+	      arr.push(this.readSVarint());
 	    }
 
+	    return arr;
+	  },
+	  readPackedBoolean: function readPackedBoolean(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readBoolean());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	    function singularParent() {
-	        var parents = commonParents();
-	        if (!parents || parents.length === 0) {
-	            _relatedParent = null;
-	            return null;
-	        }
+	    while (this.pos < end) {
+	      arr.push(this.readBoolean());
+	    }
 
-	        // relatedParent is used when we visit a vertex with multiple
-	        // parents, and we want to remember which parent line we started on.
+	    return arr;
+	  },
+	  readPackedFloat: function readPackedFloat(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readFloat());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	        if (parents.length === 1) {
-	            _relatedParent = parents[0];  // remember this parent for later
-	            return _relatedParent;
-	        }
+	    while (this.pos < end) {
+	      arr.push(this.readFloat());
+	    }
 
-	        if (parents.indexOf(_relatedParent) !== -1) {
-	            return _relatedParent;   // prefer the previously seen parent
-	        }
+	    return arr;
+	  },
+	  readPackedDouble: function readPackedDouble(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readDouble());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	        return parents[0];
+	    while (this.pos < end) {
+	      arr.push(this.readDouble());
 	    }
 
+	    return arr;
+	  },
+	  readPackedFixed32: function readPackedFixed32(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readFixed32());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	    mode.selectedIDs = function(val) {
-	        if (!arguments.length) { return selectedIDs; }
-	        selectedIDs = val;
-	        return mode;
-	    };
-
+	    while (this.pos < end) {
+	      arr.push(this.readFixed32());
+	    }
 
-	    mode.zoomToSelected = function() {
-	        context.map().zoomToEase(selectedEntities());
-	    };
+	    return arr;
+	  },
+	  readPackedSFixed32: function readPackedSFixed32(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed32());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
+	    while (this.pos < end) {
+	      arr.push(this.readSFixed32());
+	    }
 
-	    mode.newFeature = function(val) {
-	        if (!arguments.length) { return _newFeature; }
-	        _newFeature = val;
-	        return mode;
-	    };
+	    return arr;
+	  },
+	  readPackedFixed64: function readPackedFixed64(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readFixed64());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
+	    while (this.pos < end) {
+	      arr.push(this.readFixed64());
+	    }
 
-	    mode.selectBehavior = function(val) {
-	        if (!arguments.length) { return _selectBehavior; }
-	        _selectBehavior = val;
-	        return mode;
-	    };
+	    return arr;
+	  },
+	  readPackedSFixed64: function readPackedSFixed64(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed64());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
+	    while (this.pos < end) {
+	      arr.push(this.readSFixed64());
+	    }
 
-	    mode.follow = function(val) {
-	        if (!arguments.length) { return _follow; }
-	        _follow = val;
-	        return mode;
-	    };
+	    return arr;
+	  },
+	  skip: function skip(val) {
+	    var type = val & 0x7;
+	    if (type === Pbf.Varint) while (this.buf[this.pos++] > 0x7f) {} else if (type === Pbf.Bytes) this.pos = this.readVarint() + this.pos;else if (type === Pbf.Fixed32) this.pos += 4;else if (type === Pbf.Fixed64) this.pos += 8;else throw new Error('Unimplemented type: ' + type);
+	  },
+	  // === WRITING =================================================================
+	  writeTag: function writeTag(tag, type) {
+	    this.writeVarint(tag << 3 | type);
+	  },
+	  realloc: function realloc(min) {
+	    var length = this.length || 16;
 
-	    function loadOperations() {
+	    while (length < this.pos + min) {
+	      length *= 2;
+	    }
 
-	        _operations.forEach(function(operation) {
-	            if (operation.behavior) {
-	                context.uninstall(operation.behavior);
-	            }
-	        });
+	    if (length !== this.length) {
+	      var buf = new Uint8Array(length);
+	      buf.set(this.buf);
+	      this.buf = buf;
+	      this.length = length;
+	    }
+	  },
+	  finish: function finish() {
+	    this.length = this.pos;
+	    this.pos = 0;
+	    return this.buf.subarray(0, this.length);
+	  },
+	  writeFixed32: function writeFixed32(val) {
+	    this.realloc(4);
+	    writeInt32(this.buf, val, this.pos);
+	    this.pos += 4;
+	  },
+	  writeSFixed32: function writeSFixed32(val) {
+	    this.realloc(4);
+	    writeInt32(this.buf, val, this.pos);
+	    this.pos += 4;
+	  },
+	  writeFixed64: function writeFixed64(val) {
+	    this.realloc(8);
+	    writeInt32(this.buf, val & -1, this.pos);
+	    writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);
+	    this.pos += 8;
+	  },
+	  writeSFixed64: function writeSFixed64(val) {
+	    this.realloc(8);
+	    writeInt32(this.buf, val & -1, this.pos);
+	    writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);
+	    this.pos += 8;
+	  },
+	  writeVarint: function writeVarint(val) {
+	    val = +val || 0;
 
-	        _operations = Object.values(Operations)
-	            .map(function(o) { return o(context, selectedIDs); })
-	            .filter(function(o) { return o.available() && o.id !== 'delete' && o.id !== 'downgrade' && o.id !== 'copy'; });
+	    if (val > 0xfffffff || val < 0) {
+	      writeBigVarint(val, this);
+	      return;
+	    }
 
-	        var copyOperation = operationCopy(context, selectedIDs);
-	        if (copyOperation.available()) {
-	            // group copy operation with delete/downgrade
-	            _operations.push(copyOperation);
-	        }
+	    this.realloc(4);
+	    this.buf[this.pos++] = val & 0x7f | (val > 0x7f ? 0x80 : 0);
+	    if (val <= 0x7f) return;
+	    this.buf[this.pos++] = (val >>>= 7) & 0x7f | (val > 0x7f ? 0x80 : 0);
+	    if (val <= 0x7f) return;
+	    this.buf[this.pos++] = (val >>>= 7) & 0x7f | (val > 0x7f ? 0x80 : 0);
+	    if (val <= 0x7f) return;
+	    this.buf[this.pos++] = val >>> 7 & 0x7f;
+	  },
+	  writeSVarint: function writeSVarint(val) {
+	    this.writeVarint(val < 0 ? -val * 2 - 1 : val * 2);
+	  },
+	  writeBoolean: function writeBoolean(val) {
+	    this.writeVarint(Boolean(val));
+	  },
+	  writeString: function writeString(str) {
+	    str = String(str);
+	    this.realloc(str.length * 4);
+	    this.pos++; // reserve 1 byte for short string length
 
-	        var downgradeOperation = operationDowngrade(context, selectedIDs);
-	        // don't allow delete if downgrade is available
-	        var lastOperation = !context.inIntro() && downgradeOperation.available() ? downgradeOperation : operationDelete(context, selectedIDs);
+	    var startPos = this.pos; // write the string directly to the buffer and see how much was written
 
-	        _operations.push(lastOperation);
+	    this.pos = writeUtf8(this.buf, str, this.pos);
+	    var len = this.pos - startPos;
+	    if (len >= 0x80) makeRoomForExtraLength(startPos, len, this); // finally, write the message length in the reserved place and restore the position
 
-	        _operations.forEach(function(operation) {
-	            if (operation.behavior) {
-	                context.install(operation.behavior);
-	            }
-	        });
+	    this.pos = startPos - 1;
+	    this.writeVarint(len);
+	    this.pos += len;
+	  },
+	  writeFloat: function writeFloat(val) {
+	    this.realloc(4);
+	    ieee754.write(this.buf, val, this.pos, true, 23, 4);
+	    this.pos += 4;
+	  },
+	  writeDouble: function writeDouble(val) {
+	    this.realloc(8);
+	    ieee754.write(this.buf, val, this.pos, true, 52, 8);
+	    this.pos += 8;
+	  },
+	  writeBytes: function writeBytes(buffer) {
+	    var len = buffer.length;
+	    this.writeVarint(len);
+	    this.realloc(len);
 
-	        // remove any displayed menu
-	        context.ui().closeEditMenu();
+	    for (var i = 0; i < len; i++) {
+	      this.buf[this.pos++] = buffer[i];
 	    }
+	  },
+	  writeRawMessage: function writeRawMessage(fn, obj) {
+	    this.pos++; // reserve 1 byte for short message length
+	    // write the message directly to the buffer and see how much was written
+
+	    var startPos = this.pos;
+	    fn(obj, this);
+	    var len = this.pos - startPos;
+	    if (len >= 0x80) makeRoomForExtraLength(startPos, len, this); // finally, write the message length in the reserved place and restore the position
+
+	    this.pos = startPos - 1;
+	    this.writeVarint(len);
+	    this.pos += len;
+	  },
+	  writeMessage: function writeMessage(tag, fn, obj) {
+	    this.writeTag(tag, Pbf.Bytes);
+	    this.writeRawMessage(fn, obj);
+	  },
+	  writePackedVarint: function writePackedVarint(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedVarint, arr);
+	  },
+	  writePackedSVarint: function writePackedSVarint(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedSVarint, arr);
+	  },
+	  writePackedBoolean: function writePackedBoolean(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedBoolean, arr);
+	  },
+	  writePackedFloat: function writePackedFloat(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedFloat, arr);
+	  },
+	  writePackedDouble: function writePackedDouble(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedDouble, arr);
+	  },
+	  writePackedFixed32: function writePackedFixed32(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedFixed, arr);
+	  },
+	  writePackedSFixed32: function writePackedSFixed32(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedSFixed, arr);
+	  },
+	  writePackedFixed64: function writePackedFixed64(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedFixed2, arr);
+	  },
+	  writePackedSFixed64: function writePackedSFixed64(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedSFixed2, arr);
+	  },
+	  writeBytesField: function writeBytesField(tag, buffer) {
+	    this.writeTag(tag, Pbf.Bytes);
+	    this.writeBytes(buffer);
+	  },
+	  writeFixed32Field: function writeFixed32Field(tag, val) {
+	    this.writeTag(tag, Pbf.Fixed32);
+	    this.writeFixed32(val);
+	  },
+	  writeSFixed32Field: function writeSFixed32Field(tag, val) {
+	    this.writeTag(tag, Pbf.Fixed32);
+	    this.writeSFixed32(val);
+	  },
+	  writeFixed64Field: function writeFixed64Field(tag, val) {
+	    this.writeTag(tag, Pbf.Fixed64);
+	    this.writeFixed64(val);
+	  },
+	  writeSFixed64Field: function writeSFixed64Field(tag, val) {
+	    this.writeTag(tag, Pbf.Fixed64);
+	    this.writeSFixed64(val);
+	  },
+	  writeVarintField: function writeVarintField(tag, val) {
+	    this.writeTag(tag, Pbf.Varint);
+	    this.writeVarint(val);
+	  },
+	  writeSVarintField: function writeSVarintField(tag, val) {
+	    this.writeTag(tag, Pbf.Varint);
+	    this.writeSVarint(val);
+	  },
+	  writeStringField: function writeStringField(tag, str) {
+	    this.writeTag(tag, Pbf.Bytes);
+	    this.writeString(str);
+	  },
+	  writeFloatField: function writeFloatField(tag, val) {
+	    this.writeTag(tag, Pbf.Fixed32);
+	    this.writeFloat(val);
+	  },
+	  writeDoubleField: function writeDoubleField(tag, val) {
+	    this.writeTag(tag, Pbf.Fixed64);
+	    this.writeDouble(val);
+	  },
+	  writeBooleanField: function writeBooleanField(tag, val) {
+	    this.writeVarintField(tag, Boolean(val));
+	  }
+	};
 
-	    mode.operations = function() {
-	        return _operations;
-	    };
-
+	function readVarintRemainder(l, s, p) {
+	  var buf = p.buf,
+	      h,
+	      b;
+	  b = buf[p.pos++];
+	  h = (b & 0x70) >> 4;
+	  if (b < 0x80) return toNum(l, h, s);
+	  b = buf[p.pos++];
+	  h |= (b & 0x7f) << 3;
+	  if (b < 0x80) return toNum(l, h, s);
+	  b = buf[p.pos++];
+	  h |= (b & 0x7f) << 10;
+	  if (b < 0x80) return toNum(l, h, s);
+	  b = buf[p.pos++];
+	  h |= (b & 0x7f) << 17;
+	  if (b < 0x80) return toNum(l, h, s);
+	  b = buf[p.pos++];
+	  h |= (b & 0x7f) << 24;
+	  if (b < 0x80) return toNum(l, h, s);
+	  b = buf[p.pos++];
+	  h |= (b & 0x01) << 31;
+	  if (b < 0x80) return toNum(l, h, s);
+	  throw new Error('Expected varint not more than 10 bytes');
+	}
 
-	    mode.enter = function() {
-	        if (!checkSelectedIDs()) { return; }
-
-	        context.features().forceVisible(selectedIDs);
-
-	        _modeDragNode.restoreSelectedIDs(selectedIDs);
-
-	        loadOperations();
-
-	        if (!_behaviors.length) {
-	            if (!_selectBehavior) { _selectBehavior = behaviorSelect(context); }
-
-	            _behaviors = [
-	                behaviorPaste(context),
-	                _breatheBehavior,
-	                behaviorHover(context).on('hover', context.ui().sidebar.hoverModeSelect),
-	                _selectBehavior,
-	                behaviorLasso(context),
-	                _modeDragNode.behavior,
-	                modeDragNote(context).behavior
-	            ];
-	        }
-	        _behaviors.forEach(context.install);
-
-	        keybinding
-	            .on(_t('inspector.zoom_to.key'), mode.zoomToSelected)
-	            .on(['[', 'pgup'], previousVertex)
-	            .on([']', 'pgdown'], nextVertex)
-	            .on(['{', uiCmd('⌘['), 'home'], firstVertex)
-	            .on(['}', uiCmd('⌘]'), 'end'], lastVertex)
-	            .on(uiCmd('⇧←'), nudgeSelection([-10, 0]))
-	            .on(uiCmd('⇧↑'), nudgeSelection([0, -10]))
-	            .on(uiCmd('⇧→'), nudgeSelection([10, 0]))
-	            .on(uiCmd('⇧↓'), nudgeSelection([0, 10]))
-	            .on(uiCmd('⇧⌘←'), nudgeSelection([-100, 0]))
-	            .on(uiCmd('⇧⌘↑'), nudgeSelection([0, -100]))
-	            .on(uiCmd('⇧⌘→'), nudgeSelection([100, 0]))
-	            .on(uiCmd('⇧⌘↓'), nudgeSelection([0, 100]))
-	            .on(['\\', 'pause'], nextParent)
-	            .on('⎋', esc, true);
-
-	        select(document)
-	            .call(keybinding);
-
-	        context.ui().sidebar
-	            .select(selectedIDs, _newFeature);
-
-	        context.history()
-	            .on('change.select', function() {
-	                loadOperations();
-	                // reselect after change in case relation members were removed or added
-	                selectElements();
-	            })
-	            .on('undone.select', checkSelectedIDs)
-	            .on('redone.select', checkSelectedIDs);
-
-	        context.map()
-	            .on('drawn.select', selectElements)
-	            .on('crossEditableZoom.select', function() {
-	                selectElements();
-	                _breatheBehavior.restartIfNeeded(context.surface());
-	            });
+	function readPackedEnd(pbf) {
+	  return pbf.type === Pbf.Bytes ? pbf.readVarint() + pbf.pos : pbf.pos + 1;
+	}
 
-	        context.map().doubleUpHandler()
-	            .on('doubleUp.modeSelect', didDoubleUp);
+	function toNum(low, high, isSigned) {
+	  if (isSigned) {
+	    return high * 0x100000000 + (low >>> 0);
+	  }
 
+	  return (high >>> 0) * 0x100000000 + (low >>> 0);
+	}
 
-	        selectElements();
+	function writeBigVarint(val, pbf) {
+	  var low, high;
 
-	        if (_follow) {
-	            var extent = geoExtent();
-	            var graph = context.graph();
-	            selectedIDs.forEach(function(id) {
-	                var entity = context.entity(id);
-	                extent._extend(entity.extent(graph));
-	            });
+	  if (val >= 0) {
+	    low = val % 0x100000000 | 0;
+	    high = val / 0x100000000 | 0;
+	  } else {
+	    low = ~(-val % 0x100000000);
+	    high = ~(-val / 0x100000000);
 
-	            var loc = extent.center();
-	            context.map().centerEase(loc);
-	            // we could enter the mode multiple times, so reset follow for next time
-	            _follow = false;
-	        }
+	    if (low ^ 0xffffffff) {
+	      low = low + 1 | 0;
+	    } else {
+	      low = 0;
+	      high = high + 1 | 0;
+	    }
+	  }
 
+	  if (val >= 0x10000000000000000 || val < -0x10000000000000000) {
+	    throw new Error('Given varint doesn\'t fit into 10 bytes');
+	  }
 
-	        function nudgeSelection(delta) {
-	            return function() {
-	                // prevent nudging during low zoom selection
-	                if (!context.map().withinEditableZoom()) { return; }
+	  pbf.realloc(10);
+	  writeBigVarintLow(low, high, pbf);
+	  writeBigVarintHigh(high, pbf);
+	}
 
-	                var moveOp = operationMove(context, selectedIDs);
-	                if (moveOp.disabled()) {
-	                    context.ui().flash
-	                        .duration(4000)
-	                        .iconName('#iD-operation-' + moveOp.id)
-	                        .iconClass('operation disabled')
-	                        .text(moveOp.tooltip)();
-	                } else {
-	                    context.perform(actionMove(selectedIDs, delta, context.projection), moveOp.annotation());
-	                }
-	            };
-	        }
+	function writeBigVarintLow(low, high, pbf) {
+	  pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
+	  low >>>= 7;
+	  pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
+	  low >>>= 7;
+	  pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
+	  low >>>= 7;
+	  pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
+	  low >>>= 7;
+	  pbf.buf[pbf.pos] = low & 0x7f;
+	}
 
+	function writeBigVarintHigh(high, pbf) {
+	  var lsb = (high & 0x07) << 4;
+	  pbf.buf[pbf.pos++] |= lsb | ((high >>>= 3) ? 0x80 : 0);
+	  if (!high) return;
+	  pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
+	  if (!high) return;
+	  pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
+	  if (!high) return;
+	  pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
+	  if (!high) return;
+	  pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
+	  if (!high) return;
+	  pbf.buf[pbf.pos++] = high & 0x7f;
+	}
 
-	        function didDoubleUp(loc) {
-	            if (!context.map().withinEditableZoom()) { return; }
+	function makeRoomForExtraLength(startPos, len, pbf) {
+	  var extraLen = len <= 0x3fff ? 1 : len <= 0x1fffff ? 2 : len <= 0xfffffff ? 3 : Math.floor(Math.log(len) / (Math.LN2 * 7)); // if 1 byte isn't enough for encoding message length, shift the data to the right
 
-	            var target = select(event.target);
+	  pbf.realloc(extraLen);
 
-	            var datum = target.datum();
-	            var entity = datum && datum.properties && datum.properties.entity;
-	            if (!entity) { return; }
+	  for (var i = pbf.pos - 1; i >= startPos; i--) {
+	    pbf.buf[i + extraLen] = pbf.buf[i];
+	  }
+	}
 
-	            if (entity instanceof osmWay && target.classed('target')) {
-	                var choice = geoChooseEdge(context.graph().childNodes(entity), loc, context.projection);
-	                var prev = entity.nodes[choice.index - 1];
-	                var next = entity.nodes[choice.index];
+	function _writePackedVarint(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeVarint(arr[i]);
+	  }
+	}
 
-	                context.perform(
-	                    actionAddMidpoint({ loc: choice.loc, edge: [prev, next] }, osmNode()),
-	                    _t('operations.add.annotation.vertex')
-	                );
+	function _writePackedSVarint(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeSVarint(arr[i]);
+	  }
+	}
 
-	            } else if (entity.type === 'midpoint') {
-	                context.perform(
-	                    actionAddMidpoint({ loc: entity.loc, edge: entity.edge }, osmNode()),
-	                    _t('operations.add.annotation.vertex'));
-	            }
-	        }
+	function _writePackedFloat(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeFloat(arr[i]);
+	  }
+	}
 
+	function _writePackedDouble(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeDouble(arr[i]);
+	  }
+	}
 
-	        function selectElements() {
-	            if (!checkSelectedIDs()) { return; }
+	function _writePackedBoolean(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeBoolean(arr[i]);
+	  }
+	}
 
-	            var surface = context.surface();
+	function _writePackedFixed(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeFixed32(arr[i]);
+	  }
+	}
 
-	            surface.selectAll('.selected-member')
-	                .classed('selected-member', false);
+	function _writePackedSFixed(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeSFixed32(arr[i]);
+	  }
+	}
 
-	            surface.selectAll('.selected')
-	                .classed('selected', false);
+	function _writePackedFixed2(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeFixed64(arr[i]);
+	  }
+	}
 
-	            surface.selectAll('.related')
-	                .classed('related', false);
+	function _writePackedSFixed2(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeSFixed64(arr[i]);
+	  }
+	} // Buffer code below from https://github.com/feross/buffer, MIT-licensed
 
-	            singularParent();
-	            if (_relatedParent) {
-	                surface.selectAll(utilEntitySelector([_relatedParent]))
-	                    .classed('related', true);
-	            }
 
-	            if (context.map().withinEditableZoom()) {
-	                // Apply selection styling if not in wide selection
+	function readUInt32(buf, pos) {
+	  return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + buf[pos + 3] * 0x1000000;
+	}
 
-	                surface
-	                    .selectAll(utilDeepMemberSelector(selectedIDs, context.graph(), true /* skipMultipolgonMembers */))
-	                    .classed('selected-member', true);
-	                surface
-	                    .selectAll(utilEntityOrDeepMemberSelector(selectedIDs, context.graph()))
-	                    .classed('selected', true);
-	            }
+	function writeInt32(buf, val, pos) {
+	  buf[pos] = val;
+	  buf[pos + 1] = val >>> 8;
+	  buf[pos + 2] = val >>> 16;
+	  buf[pos + 3] = val >>> 24;
+	}
 
-	        }
+	function readInt32(buf, pos) {
+	  return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + (buf[pos + 3] << 24);
+	}
 
+	function readUtf8(buf, pos, end) {
+	  var str = '';
+	  var i = pos;
 
-	        function esc() {
-	            if (context.container().select('.combobox').size()) { return; }
-	            context.enter(modeBrowse(context));
-	        }
+	  while (i < end) {
+	    var b0 = buf[i];
+	    var c = null; // codepoint
 
+	    var bytesPerSequence = b0 > 0xEF ? 4 : b0 > 0xDF ? 3 : b0 > 0xBF ? 2 : 1;
+	    if (i + bytesPerSequence > end) break;
+	    var b1, b2, b3;
 
-	        function firstVertex() {
-	            event.preventDefault();
-	            var entity = singular();
-	            var parent = singularParent();
-	            var way;
+	    if (bytesPerSequence === 1) {
+	      if (b0 < 0x80) {
+	        c = b0;
+	      }
+	    } else if (bytesPerSequence === 2) {
+	      b1 = buf[i + 1];
 
-	            if (entity && entity.type === 'way') {
-	                way = entity;
-	            } else if (parent) {
-	                way = context.entity(parent);
-	            }
+	      if ((b1 & 0xC0) === 0x80) {
+	        c = (b0 & 0x1F) << 0x6 | b1 & 0x3F;
 
-	            if (way) {
-	                context.enter(
-	                    modeSelect(context, [way.first()]).follow(true)
-	                );
-	            }
+	        if (c <= 0x7F) {
+	          c = null;
 	        }
+	      }
+	    } else if (bytesPerSequence === 3) {
+	      b1 = buf[i + 1];
+	      b2 = buf[i + 2];
 
+	      if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80) {
+	        c = (b0 & 0xF) << 0xC | (b1 & 0x3F) << 0x6 | b2 & 0x3F;
 
-	        function lastVertex() {
-	            event.preventDefault();
-	            var entity = singular();
-	            var parent = singularParent();
-	            var way;
+	        if (c <= 0x7FF || c >= 0xD800 && c <= 0xDFFF) {
+	          c = null;
+	        }
+	      }
+	    } else if (bytesPerSequence === 4) {
+	      b1 = buf[i + 1];
+	      b2 = buf[i + 2];
+	      b3 = buf[i + 3];
 
-	            if (entity && entity.type === 'way') {
-	                way = entity;
-	            } else if (parent) {
-	                way = context.entity(parent);
-	            }
+	      if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80 && (b3 & 0xC0) === 0x80) {
+	        c = (b0 & 0xF) << 0x12 | (b1 & 0x3F) << 0xC | (b2 & 0x3F) << 0x6 | b3 & 0x3F;
 
-	            if (way) {
-	                context.enter(
-	                    modeSelect(context, [way.last()]).follow(true)
-	                );
-	            }
+	        if (c <= 0xFFFF || c >= 0x110000) {
+	          c = null;
 	        }
+	      }
+	    }
 
+	    if (c === null) {
+	      c = 0xFFFD;
+	      bytesPerSequence = 1;
+	    } else if (c > 0xFFFF) {
+	      c -= 0x10000;
+	      str += String.fromCharCode(c >>> 10 & 0x3FF | 0xD800);
+	      c = 0xDC00 | c & 0x3FF;
+	    }
 
-	        function previousVertex() {
-	            event.preventDefault();
-	            var parent = singularParent();
-	            if (!parent) { return; }
+	    str += String.fromCharCode(c);
+	    i += bytesPerSequence;
+	  }
 
-	            var way = context.entity(parent);
-	            var length = way.nodes.length;
-	            var curr = way.nodes.indexOf(selectedIDs[0]);
-	            var index = -1;
+	  return str;
+	}
 
-	            if (curr > 0) {
-	                index = curr - 1;
-	            } else if (way.isClosed()) {
-	                index = length - 2;
-	            }
+	function readUtf8TextDecoder(buf, pos, end) {
+	  return utf8TextDecoder.decode(buf.subarray(pos, end));
+	}
 
-	            if (index !== -1) {
-	                context.enter(
-	                    modeSelect(context, [way.nodes[index]]).follow(true)
-	                );
-	            }
+	function writeUtf8(buf, str, pos) {
+	  for (var i = 0, c, lead; i < str.length; i++) {
+	    c = str.charCodeAt(i); // code point
+
+	    if (c > 0xD7FF && c < 0xE000) {
+	      if (lead) {
+	        if (c < 0xDC00) {
+	          buf[pos++] = 0xEF;
+	          buf[pos++] = 0xBF;
+	          buf[pos++] = 0xBD;
+	          lead = c;
+	          continue;
+	        } else {
+	          c = lead - 0xD800 << 10 | c - 0xDC00 | 0x10000;
+	          lead = null;
+	        }
+	      } else {
+	        if (c > 0xDBFF || i + 1 === str.length) {
+	          buf[pos++] = 0xEF;
+	          buf[pos++] = 0xBF;
+	          buf[pos++] = 0xBD;
+	        } else {
+	          lead = c;
 	        }
 
+	        continue;
+	      }
+	    } else if (lead) {
+	      buf[pos++] = 0xEF;
+	      buf[pos++] = 0xBF;
+	      buf[pos++] = 0xBD;
+	      lead = null;
+	    }
 
-	        function nextVertex() {
-	            event.preventDefault();
-	            var parent = singularParent();
-	            if (!parent) { return; }
-
-	            var way = context.entity(parent);
-	            var length = way.nodes.length;
-	            var curr = way.nodes.indexOf(selectedIDs[0]);
-	            var index = -1;
-
-	            if (curr < length - 1) {
-	                index = curr + 1;
-	            } else if (way.isClosed()) {
-	                index = 0;
-	            }
-
-	            if (index !== -1) {
-	                context.enter(
-	                    modeSelect(context, [way.nodes[index]]).follow(true)
-	                );
-	            }
+	    if (c < 0x80) {
+	      buf[pos++] = c;
+	    } else {
+	      if (c < 0x800) {
+	        buf[pos++] = c >> 0x6 | 0xC0;
+	      } else {
+	        if (c < 0x10000) {
+	          buf[pos++] = c >> 0xC | 0xE0;
+	        } else {
+	          buf[pos++] = c >> 0x12 | 0xF0;
+	          buf[pos++] = c >> 0xC & 0x3F | 0x80;
 	        }
 
+	        buf[pos++] = c >> 0x6 & 0x3F | 0x80;
+	      }
 
-	        function nextParent() {
-	            event.preventDefault();
-	            var parents = commonParents();
-	            if (!parents || parents.length < 2) { return; }
+	      buf[pos++] = c & 0x3F | 0x80;
+	    }
+	  }
 
-	            var index = parents.indexOf(_relatedParent);
-	            if (index < 0 || index > parents.length - 2) {
-	                _relatedParent = parents[0];
-	            } else {
-	                _relatedParent = parents[index + 1];
-	            }
+	  return pos;
+	}
 
-	            var surface = context.surface();
-	            surface.selectAll('.related')
-	                .classed('related', false);
+	var vectorTile = {};
 
-	            if (_relatedParent) {
-	                surface.selectAll(utilEntitySelector([_relatedParent]))
-	                    .classed('related', true);
-	            }
-	        }
-	    };
+	var pointGeometry = Point$1;
+	/**
+	 * A standalone point geometry with useful accessor, comparison, and
+	 * modification methods.
+	 *
+	 * @class Point
+	 * @param {Number} x the x-coordinate. this could be longitude or screen
+	 * pixels, or any other sort of unit.
+	 * @param {Number} y the y-coordinate. this could be latitude or screen
+	 * pixels, or any other sort of unit.
+	 * @example
+	 * var point = new Point(-77, 38);
+	 */
 
+	function Point$1(x, y) {
+	  this.x = x;
+	  this.y = y;
+	}
 
-	    mode.exit = function() {
+	Point$1.prototype = {
+	  /**
+	   * Clone this point, returning a new point that can be modified
+	   * without affecting the old one.
+	   * @return {Point} the clone
+	   */
+	  clone: function clone() {
+	    return new Point$1(this.x, this.y);
+	  },
 
-	        _newFeature = false;
+	  /**
+	   * Add this point's x & y coordinates to another point,
+	   * yielding a new point.
+	   * @param {Point} p the other point
+	   * @return {Point} output point
+	   */
+	  add: function add(p) {
+	    return this.clone()._add(p);
+	  },
 
-	        _operations.forEach(function(operation) {
-	            if (operation.behavior) {
-	                context.uninstall(operation.behavior);
-	            }
-	        });
-	        _operations = [];
+	  /**
+	   * Subtract this point's x & y coordinates to from point,
+	   * yielding a new point.
+	   * @param {Point} p the other point
+	   * @return {Point} output point
+	   */
+	  sub: function sub(p) {
+	    return this.clone()._sub(p);
+	  },
 
-	        _behaviors.forEach(context.uninstall);
+	  /**
+	   * Multiply this point's x & y coordinates by point,
+	   * yielding a new point.
+	   * @param {Point} p the other point
+	   * @return {Point} output point
+	   */
+	  multByPoint: function multByPoint(p) {
+	    return this.clone()._multByPoint(p);
+	  },
 
-	        select(document)
-	            .call(keybinding.unbind);
+	  /**
+	   * Divide this point's x & y coordinates by point,
+	   * yielding a new point.
+	   * @param {Point} p the other point
+	   * @return {Point} output point
+	   */
+	  divByPoint: function divByPoint(p) {
+	    return this.clone()._divByPoint(p);
+	  },
 
-	        context.ui().closeEditMenu();
+	  /**
+	   * Multiply this point's x & y coordinates by a factor,
+	   * yielding a new point.
+	   * @param {Point} k factor
+	   * @return {Point} output point
+	   */
+	  mult: function mult(k) {
+	    return this.clone()._mult(k);
+	  },
 
-	        context.history()
-	            .on('change.select', null)
-	            .on('undone.select', null)
-	            .on('redone.select', null);
+	  /**
+	   * Divide this point's x & y coordinates by a factor,
+	   * yielding a new point.
+	   * @param {Point} k factor
+	   * @return {Point} output point
+	   */
+	  div: function div(k) {
+	    return this.clone()._div(k);
+	  },
 
-	        var surface = context.surface();
+	  /**
+	   * Rotate this point around the 0, 0 origin by an angle a,
+	   * given in radians
+	   * @param {Number} a angle to rotate around, in radians
+	   * @return {Point} output point
+	   */
+	  rotate: function rotate(a) {
+	    return this.clone()._rotate(a);
+	  },
 
-	        surface
-	            .selectAll('.selected-member')
-	            .classed('selected-member', false);
+	  /**
+	   * Rotate this point around p point by an angle a,
+	   * given in radians
+	   * @param {Number} a angle to rotate around, in radians
+	   * @param {Point} p Point to rotate around
+	   * @return {Point} output point
+	   */
+	  rotateAround: function rotateAround(a, p) {
+	    return this.clone()._rotateAround(a, p);
+	  },
 
-	        surface
-	            .selectAll('.selected')
-	            .classed('selected', false);
+	  /**
+	   * Multiply this point by a 4x1 transformation matrix
+	   * @param {Array<Number>} m transformation matrix
+	   * @return {Point} output point
+	   */
+	  matMult: function matMult(m) {
+	    return this.clone()._matMult(m);
+	  },
 
-	        surface
-	            .selectAll('.highlighted')
-	            .classed('highlighted', false);
+	  /**
+	   * Calculate this point but as a unit vector from 0, 0, meaning
+	   * that the distance from the resulting point to the 0, 0
+	   * coordinate will be equal to 1 and the angle from the resulting
+	   * point to the 0, 0 coordinate will be the same as before.
+	   * @return {Point} unit vector point
+	   */
+	  unit: function unit() {
+	    return this.clone()._unit();
+	  },
 
-	        surface
-	            .selectAll('.related')
-	            .classed('related', false);
+	  /**
+	   * Compute a perpendicular point, where the new y coordinate
+	   * is the old x coordinate and the new x coordinate is the old y
+	   * coordinate multiplied by -1
+	   * @return {Point} perpendicular point
+	   */
+	  perp: function perp() {
+	    return this.clone()._perp();
+	  },
 
-	        context.map().on('drawn.select', null);
-	        context.ui().sidebar.hide();
-	        context.features().forceVisible([]);
+	  /**
+	   * Return a version of this point with the x & y coordinates
+	   * rounded to integers.
+	   * @return {Point} rounded point
+	   */
+	  round: function round() {
+	    return this.clone()._round();
+	  },
 
-	        var entity = singular();
-	        if (_newFeature && entity && entity.type === 'relation' &&
-	            // no tags
-	            Object.keys(entity.tags).length === 0 &&
-	            // no parent relations
-	            context.graph().parentRelations(entity).length === 0 &&
-	            // no members or one member with no role
-	            (entity.members.length === 0 || (entity.members.length === 1 && !entity.members[0].role))
-	        ) {
-	            // the user added this relation but didn't edit it at all, so just delete it
-	            var deleteAction = actionDeleteRelation(entity.id, true /* don't delete untagged members */);
-	            context.perform(deleteAction, _t('operations.delete.annotation.relation'));
-	        }
-	    };
+	  /**
+	   * Return the magitude of this point: this is the Euclidean
+	   * distance from the 0, 0 coordinate to this point's x and y
+	   * coordinates.
+	   * @return {Number} magnitude
+	   */
+	  mag: function mag() {
+	    return Math.sqrt(this.x * this.x + this.y * this.y);
+	  },
 
+	  /**
+	   * Judge whether this point is equal to another point, returning
+	   * true or false.
+	   * @param {Point} other the other point
+	   * @return {boolean} whether the points are equal
+	   */
+	  equals: function equals(other) {
+	    return this.x === other.x && this.y === other.y;
+	  },
 
-	    return mode;
-	}
+	  /**
+	   * Calculate the distance from this point to another point
+	   * @param {Point} p the other point
+	   * @return {Number} distance
+	   */
+	  dist: function dist(p) {
+	    return Math.sqrt(this.distSqr(p));
+	  },
 
-	function uiLasso(context) {
-	    var group, polygon;
+	  /**
+	   * Calculate the distance from this point to another point,
+	   * without the square root step. Useful if you're comparing
+	   * relative distances.
+	   * @param {Point} p the other point
+	   * @return {Number} distance
+	   */
+	  distSqr: function distSqr(p) {
+	    var dx = p.x - this.x,
+	        dy = p.y - this.y;
+	    return dx * dx + dy * dy;
+	  },
 
-	    lasso.coordinates = [];
+	  /**
+	   * Get the angle from the 0, 0 coordinate to this point, in radians
+	   * coordinates.
+	   * @return {Number} angle
+	   */
+	  angle: function angle() {
+	    return Math.atan2(this.y, this.x);
+	  },
 
-	    function lasso(selection) {
-	        context.container()
-	            .classed('lasso', true);
+	  /**
+	   * Get the angle from this point to another point, in radians
+	   * @param {Point} b the other point
+	   * @return {Number} angle
+	   */
+	  angleTo: function angleTo(b) {
+	    return Math.atan2(this.y - b.y, this.x - b.x);
+	  },
 
-	        group = selection
-	            .append('g')
-	            .attr('class', 'lasso hide');
+	  /**
+	   * Get the angle between this point and another point, in radians
+	   * @param {Point} b the other point
+	   * @return {Number} angle
+	   */
+	  angleWith: function angleWith(b) {
+	    return this.angleWithSep(b.x, b.y);
+	  },
 
-	        polygon = group
-	            .append('path')
-	            .attr('class', 'lasso-path');
+	  /*
+	   * Find the angle of the two vectors, solving the formula for
+	   * the cross product a x b = |a||b|sin(θ) for θ.
+	   * @param {Number} x the x-coordinate
+	   * @param {Number} y the y-coordinate
+	   * @return {Number} the angle in radians
+	   */
+	  angleWithSep: function angleWithSep(x, y) {
+	    return Math.atan2(this.x * y - this.y * x, this.x * x + this.y * y);
+	  },
+	  _matMult: function _matMult(m) {
+	    var x = m[0] * this.x + m[1] * this.y,
+	        y = m[2] * this.x + m[3] * this.y;
+	    this.x = x;
+	    this.y = y;
+	    return this;
+	  },
+	  _add: function _add(p) {
+	    this.x += p.x;
+	    this.y += p.y;
+	    return this;
+	  },
+	  _sub: function _sub(p) {
+	    this.x -= p.x;
+	    this.y -= p.y;
+	    return this;
+	  },
+	  _mult: function _mult(k) {
+	    this.x *= k;
+	    this.y *= k;
+	    return this;
+	  },
+	  _div: function _div(k) {
+	    this.x /= k;
+	    this.y /= k;
+	    return this;
+	  },
+	  _multByPoint: function _multByPoint(p) {
+	    this.x *= p.x;
+	    this.y *= p.y;
+	    return this;
+	  },
+	  _divByPoint: function _divByPoint(p) {
+	    this.x /= p.x;
+	    this.y /= p.y;
+	    return this;
+	  },
+	  _unit: function _unit() {
+	    this._div(this.mag());
 
-	        group
-	            .call(uiToggle(true));
-	    }
+	    return this;
+	  },
+	  _perp: function _perp() {
+	    var y = this.y;
+	    this.y = this.x;
+	    this.x = -y;
+	    return this;
+	  },
+	  _rotate: function _rotate(angle) {
+	    var cos = Math.cos(angle),
+	        sin = Math.sin(angle),
+	        x = cos * this.x - sin * this.y,
+	        y = sin * this.x + cos * this.y;
+	    this.x = x;
+	    this.y = y;
+	    return this;
+	  },
+	  _rotateAround: function _rotateAround(angle, p) {
+	    var cos = Math.cos(angle),
+	        sin = Math.sin(angle),
+	        x = p.x + cos * (this.x - p.x) - sin * (this.y - p.y),
+	        y = p.y + sin * (this.x - p.x) + cos * (this.y - p.y);
+	    this.x = x;
+	    this.y = y;
+	    return this;
+	  },
+	  _round: function _round() {
+	    this.x = Math.round(this.x);
+	    this.y = Math.round(this.y);
+	    return this;
+	  }
+	};
+	/**
+	 * Construct a point from an array if necessary, otherwise if the input
+	 * is already a Point, or an unknown type, return it unchanged
+	 * @param {Array<Number>|Point|*} a any kind of input value
+	 * @return {Point} constructed point, or passed-through value.
+	 * @example
+	 * // this
+	 * var point = Point.convert([0, 1]);
+	 * // is equivalent to
+	 * var point = new Point(0, 1);
+	 */
 
+	Point$1.convert = function (a) {
+	  if (a instanceof Point$1) {
+	    return a;
+	  }
 
-	    function draw() {
-	        if (polygon) {
-	            polygon.data([lasso.coordinates])
-	                .attr('d', function(d) { return 'M' + d.join(' L') + ' Z'; });
-	        }
-	    }
+	  if (Array.isArray(a)) {
+	    return new Point$1(a[0], a[1]);
+	  }
 
+	  return a;
+	};
 
-	    lasso.extent = function () {
-	        return lasso.coordinates.reduce(function(extent, point) {
-	            return extent.extend(geoExtent(point));
-	        }, geoExtent());
-	    };
+	var Point = pointGeometry;
+	var vectortilefeature = VectorTileFeature$1;
 
+	function VectorTileFeature$1(pbf, end, extent, keys, values) {
+	  // Public
+	  this.properties = {};
+	  this.extent = extent;
+	  this.type = 0; // Private
 
-	    lasso.p = function(_) {
-	        if (!arguments.length) { return lasso; }
-	        lasso.coordinates.push(_);
-	        draw();
-	        return lasso;
-	    };
+	  this._pbf = pbf;
+	  this._geometry = -1;
+	  this._keys = keys;
+	  this._values = values;
+	  pbf.readFields(readFeature, this, end);
+	}
 
+	function readFeature(tag, feature, pbf) {
+	  if (tag == 1) feature.id = pbf.readVarint();else if (tag == 2) readTag(pbf, feature);else if (tag == 3) feature.type = pbf.readVarint();else if (tag == 4) feature._geometry = pbf.pos;
+	}
 
-	    lasso.close = function() {
-	        if (group) {
-	            group.call(uiToggle(false, function() {
-	                select(this).remove();
-	            }));
-	        }
-	        context.container().classed('lasso', false);
-	    };
+	function readTag(pbf, feature) {
+	  var end = pbf.readVarint() + pbf.pos;
 
+	  while (pbf.pos < end) {
+	    var key = feature._keys[pbf.readVarint()],
+	        value = feature._values[pbf.readVarint()];
 
-	    return lasso;
+	    feature.properties[key] = value;
+	  }
 	}
 
-	function behaviorLasso(context) {
+	VectorTileFeature$1.types = ['Unknown', 'Point', 'LineString', 'Polygon'];
 
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	VectorTileFeature$1.prototype.loadGeometry = function () {
+	  var pbf = this._pbf;
+	  pbf.pos = this._geometry;
+	  var end = pbf.readVarint() + pbf.pos,
+	      cmd = 1,
+	      length = 0,
+	      x = 0,
+	      y = 0,
+	      lines = [],
+	      line;
 
-	    var behavior = function(selection) {
-	        var lasso;
+	  while (pbf.pos < end) {
+	    if (length <= 0) {
+	      var cmdLen = pbf.readVarint();
+	      cmd = cmdLen & 0x7;
+	      length = cmdLen >> 3;
+	    }
 
+	    length--;
 
-	        function pointerdown() {
-	            var button = 0;  // left
-	            if (event.button === button && event.shiftKey === true) {
-	                lasso = null;
+	    if (cmd === 1 || cmd === 2) {
+	      x += pbf.readSVarint();
+	      y += pbf.readSVarint();
 
-	                select(window)
-	                    .on(_pointerPrefix + 'move.lasso', pointermove)
-	                    .on(_pointerPrefix + 'up.lasso', pointerup);
+	      if (cmd === 1) {
+	        // moveTo
+	        if (line) lines.push(line);
+	        line = [];
+	      }
 
-	                event.stopPropagation();
-	            }
-	        }
+	      line.push(new Point(x, y));
+	    } else if (cmd === 7) {
+	      // Workaround for https://github.com/mapbox/mapnik-vector-tile/issues/90
+	      if (line) {
+	        line.push(line[0].clone()); // closePolygon
+	      }
+	    } else {
+	      throw new Error('unknown command ' + cmd);
+	    }
+	  }
 
+	  if (line) lines.push(line);
+	  return lines;
+	};
 
-	        function pointermove() {
-	            if (!lasso) {
-	                lasso = uiLasso(context);
-	                context.surface().call(lasso);
-	            }
+	VectorTileFeature$1.prototype.bbox = function () {
+	  var pbf = this._pbf;
+	  pbf.pos = this._geometry;
+	  var end = pbf.readVarint() + pbf.pos,
+	      cmd = 1,
+	      length = 0,
+	      x = 0,
+	      y = 0,
+	      x1 = Infinity,
+	      x2 = -Infinity,
+	      y1 = Infinity,
+	      y2 = -Infinity;
 
-	            lasso.p(context.map().mouse());
-	        }
+	  while (pbf.pos < end) {
+	    if (length <= 0) {
+	      var cmdLen = pbf.readVarint();
+	      cmd = cmdLen & 0x7;
+	      length = cmdLen >> 3;
+	    }
 
+	    length--;
 
-	        function normalize(a, b) {
-	            return [
-	                [Math.min(a[0], b[0]), Math.min(a[1], b[1])],
-	                [Math.max(a[0], b[0]), Math.max(a[1], b[1])]
-	            ];
-	        }
+	    if (cmd === 1 || cmd === 2) {
+	      x += pbf.readSVarint();
+	      y += pbf.readSVarint();
+	      if (x < x1) x1 = x;
+	      if (x > x2) x2 = x;
+	      if (y < y1) y1 = y;
+	      if (y > y2) y2 = y;
+	    } else if (cmd !== 7) {
+	      throw new Error('unknown command ' + cmd);
+	    }
+	  }
 
+	  return [x1, y1, x2, y2];
+	};
 
-	        function lassoed() {
-	            if (!lasso) { return []; }
+	VectorTileFeature$1.prototype.toGeoJSON = function (x, y, z) {
+	  var size = this.extent * Math.pow(2, z),
+	      x0 = this.extent * x,
+	      y0 = this.extent * y,
+	      coords = this.loadGeometry(),
+	      type = VectorTileFeature$1.types[this.type],
+	      i,
+	      j;
 
-	            var graph = context.graph();
-	            var limitToNodes;
+	  function project(line) {
+	    for (var j = 0; j < line.length; j++) {
+	      var p = line[j],
+	          y2 = 180 - (p.y + y0) * 360 / size;
+	      line[j] = [(p.x + x0) * 360 / size - 180, 360 / Math.PI * Math.atan(Math.exp(y2 * Math.PI / 180)) - 90];
+	    }
+	  }
 
-	            if (context.map().editableDataEnabled(true /* skipZoomCheck */) && context.map().isInWideSelection()) {
-	                // only select from the visible nodes
-	                limitToNodes = new Set(utilGetAllNodes(context.selectedIDs(), graph));
-	            } else if (!context.map().editableDataEnabled()) {
-	                return [];
-	            }
+	  switch (this.type) {
+	    case 1:
+	      var points = [];
 
-	            var bounds = lasso.extent().map(context.projection.invert);
-	            var extent = geoExtent(normalize(bounds[0], bounds[1]));
+	      for (i = 0; i < coords.length; i++) {
+	        points[i] = coords[i][0];
+	      }
 
-	            var intersects = context.history().intersects(extent).filter(function(entity) {
-	                return entity.type === 'node' &&
-	                    (!limitToNodes || limitToNodes.has(entity)) &&
-	                    geoPointInPolygon(context.projection(entity.loc), lasso.coordinates) &&
-	                    !context.features().isHidden(entity, graph, entity.geometry(graph));
-	            });
+	      coords = points;
+	      project(coords);
+	      break;
 
-	            // sort the lassoed nodes as best we can
-	            intersects.sort(function(node1, node2) {
-	                var parents1 = graph.parentWays(node1);
-	                var parents2 = graph.parentWays(node2);
-	                if (parents1.length && parents2.length) {
-	                    // both nodes are vertices
-
-	                    var sharedParents = utilArrayIntersection(parents1, parents2);
-	                    if (sharedParents.length) {
-	                        var sharedParentNodes = sharedParents[0].nodes;
-	                        // vertices are members of the same way; sort them in their listed order
-	                        return sharedParentNodes.indexOf(node1.id) -
-	                            sharedParentNodes.indexOf(node2.id);
-	                    } else {
-	                        // vertices do not share a way; group them by their respective parent ways
-	                        return parseFloat(parents1[0].id.slice(1)) -
-	                            parseFloat(parents2[0].id.slice(1));
-	                    }
+	    case 2:
+	      for (i = 0; i < coords.length; i++) {
+	        project(coords[i]);
+	      }
 
-	                } else if (parents1.length || parents2.length) {
-	                    // only one node is a vertex; sort standalone points before vertices
-	                    return parents1.length - parents2.length;
-	                }
-	                // both nodes are standalone points; sort left to right
-	                return node1.loc[0] - node2.loc[0];
-	            });
+	      break;
+
+	    case 3:
+	      coords = classifyRings(coords);
 
-	            return intersects.map(function(entity) { return entity.id; });
+	      for (i = 0; i < coords.length; i++) {
+	        for (j = 0; j < coords[i].length; j++) {
+	          project(coords[i][j]);
 	        }
+	      }
 
+	      break;
+	  }
 
-	        function pointerup() {
-	            select(window)
-	                .on(_pointerPrefix + 'move.lasso', null)
-	                .on(_pointerPrefix + 'up.lasso', null);
+	  if (coords.length === 1) {
+	    coords = coords[0];
+	  } else {
+	    type = 'Multi' + type;
+	  }
 
-	            if (!lasso) { return; }
+	  var result = {
+	    type: "Feature",
+	    geometry: {
+	      type: type,
+	      coordinates: coords
+	    },
+	    properties: this.properties
+	  };
 
-	            var ids = lassoed();
-	            lasso.close();
+	  if ('id' in this) {
+	    result.id = this.id;
+	  }
 
-	            if (ids.length) {
-	                context.enter(modeSelect(context, ids));
-	            }
-	        }
+	  return result;
+	}; // classifies an array of rings into polygons with outer rings and holes
 
-	        selection
-	            .on(_pointerPrefix + 'down.lasso', pointerdown);
-	    };
 
+	function classifyRings(rings) {
+	  var len = rings.length;
+	  if (len <= 1) return [rings];
+	  var polygons = [],
+	      polygon,
+	      ccw;
 
-	    behavior.off = function(selection) {
-	        selection.on(_pointerPrefix + 'down.lasso', null);
-	    };
+	  for (var i = 0; i < len; i++) {
+	    var area = signedArea(rings[i]);
+	    if (area === 0) continue;
+	    if (ccw === undefined) ccw = area < 0;
 
+	    if (ccw === area < 0) {
+	      if (polygon) polygons.push(polygon);
+	      polygon = [rings[i]];
+	    } else {
+	      polygon.push(rings[i]);
+	    }
+	  }
 
-	    return behavior;
+	  if (polygon) polygons.push(polygon);
+	  return polygons;
 	}
 
-	function modeBrowse(context) {
-	    var mode = {
-	        button: 'browse',
-	        id: 'browse',
-	        title: _t('modes.browse.title'),
-	        description: _t('modes.browse.description')
-	    };
-	    var sidebar;
-
-	    var _selectBehavior;
-	    var _behaviors = [];
+	function signedArea(ring) {
+	  var sum = 0;
 
+	  for (var i = 0, len = ring.length, j = len - 1, p1, p2; i < len; j = i++) {
+	    p1 = ring[i];
+	    p2 = ring[j];
+	    sum += (p2.x - p1.x) * (p1.y + p2.y);
+	  }
 
-	    mode.selectBehavior = function(val) {
-	        if (!arguments.length) { return _selectBehavior; }
-	        _selectBehavior = val;
-	        return mode;
-	    };
+	  return sum;
+	}
 
+	var VectorTileFeature = vectortilefeature;
+	var vectortilelayer = VectorTileLayer$1;
 
-	    mode.enter = function() {
-	        if (!_behaviors.length) {
-	            if (!_selectBehavior) { _selectBehavior = behaviorSelect(context); }
-	            _behaviors = [
-	                behaviorPaste(context),
-	                behaviorHover(context).on('hover', context.ui().sidebar.hover),
-	                _selectBehavior,
-	                behaviorLasso(context),
-	                modeDragNode(context).behavior,
-	                modeDragNote(context).behavior
-	            ];
-	        }
-	        _behaviors.forEach(context.install);
+	function VectorTileLayer$1(pbf, end) {
+	  // Public
+	  this.version = 1;
+	  this.name = null;
+	  this.extent = 4096;
+	  this.length = 0; // Private
 
-	        // Get focus on the body.
-	        if (document.activeElement && document.activeElement.blur) {
-	            document.activeElement.blur();
-	        }
+	  this._pbf = pbf;
+	  this._keys = [];
+	  this._values = [];
+	  this._features = [];
+	  pbf.readFields(readLayer, this, end);
+	  this.length = this._features.length;
+	}
 
-	        if (sidebar) {
-	            context.ui().sidebar.show(sidebar);
-	        } else {
-	            context.ui().sidebar.select(null);
-	        }
-	    };
+	function readLayer(tag, layer, pbf) {
+	  if (tag === 15) layer.version = pbf.readVarint();else if (tag === 1) layer.name = pbf.readString();else if (tag === 5) layer.extent = pbf.readVarint();else if (tag === 2) layer._features.push(pbf.pos);else if (tag === 3) layer._keys.push(pbf.readString());else if (tag === 4) layer._values.push(readValueMessage(pbf));
+	}
 
+	function readValueMessage(pbf) {
+	  var value = null,
+	      end = pbf.readVarint() + pbf.pos;
 
-	    mode.exit = function() {
-	        context.ui().sidebar.hover.cancel();
-	        _behaviors.forEach(context.uninstall);
+	  while (pbf.pos < end) {
+	    var tag = pbf.readVarint() >> 3;
+	    value = tag === 1 ? pbf.readString() : tag === 2 ? pbf.readFloat() : tag === 3 ? pbf.readDouble() : tag === 4 ? pbf.readVarint64() : tag === 5 ? pbf.readVarint() : tag === 6 ? pbf.readSVarint() : tag === 7 ? pbf.readBoolean() : null;
+	  }
 
-	        if (sidebar) {
-	            context.ui().sidebar.hide();
-	        }
-	    };
+	  return value;
+	} // return feature `i` from this layer as a `VectorTileFeature`
 
 
-	    mode.sidebar = function(_) {
-	        if (!arguments.length) { return sidebar; }
-	        sidebar = _;
-	        return mode;
-	    };
+	VectorTileLayer$1.prototype.feature = function (i) {
+	  if (i < 0 || i >= this._features.length) throw new Error('feature index out of bounds');
+	  this._pbf.pos = this._features[i];
 
+	  var end = this._pbf.readVarint() + this._pbf.pos;
 
-	    mode.operations = function() {
-	        return [operationPaste(context)];
-	    };
+	  return new VectorTileFeature(this._pbf, end, this.extent, this._keys, this._values);
+	};
 
+	var VectorTileLayer = vectortilelayer;
+	var vectortile = VectorTile$1;
 
-	    return mode;
+	function VectorTile$1(pbf, end) {
+	  this.layers = pbf.readFields(readTile, {}, end);
 	}
 
-	function behaviorAddWay(context) {
-	    var dispatch$1 = dispatch('start', 'startFromWay', 'startFromNode');
-	    var draw = behaviorDraw(context);
+	function readTile(tag, layers, pbf) {
+	  if (tag === 3) {
+	    var layer = new VectorTileLayer(pbf, pbf.readVarint() + pbf.pos);
+	    if (layer.length) layers[layer.name] = layer;
+	  }
+	}
 
-	    function behavior(surface) {
-	        draw.on('click', function() { dispatch$1.apply('start', this, arguments); })
-	            .on('clickWay', function() { dispatch$1.apply('startFromWay', this, arguments); })
-	            .on('clickNode', function() { dispatch$1.apply('startFromNode', this, arguments); })
-	            .on('cancel', behavior.cancel)
-	            .on('finish', behavior.cancel);
+	var VectorTile = vectorTile.VectorTile = vectortile;
+	vectorTile.VectorTileFeature = vectortilefeature;
+	vectorTile.VectorTileLayer = vectortilelayer;
 
-	        context.map()
-	            .dblclickZoomEnable(false);
+	var accessToken = 'MLY|4100327730013843|5bb78b81720791946a9a7b956c57b7cf';
+	var apiUrl = 'https://graph.mapillary.com/';
+	var baseTileUrl = 'https://tiles.mapillary.com/maps/vtp';
+	var mapFeatureTileUrl = "".concat(baseTileUrl, "/mly_map_feature_point/2/{z}/{x}/{y}?access_token=").concat(accessToken);
+	var tileUrl = "".concat(baseTileUrl, "/mly1_public/2/{z}/{x}/{y}?access_token=").concat(accessToken);
+	var trafficSignTileUrl = "".concat(baseTileUrl, "/mly_map_feature_traffic_sign/2/{z}/{x}/{y}?access_token=").concat(accessToken);
+	var viewercss = 'mapillary-js/mapillary.css';
+	var viewerjs = 'mapillary-js/mapillary.js';
+	var minZoom$1 = 14;
+	var dispatch$4 = dispatch$8('change', 'loadedImages', 'loadedSigns', 'loadedMapFeatures', 'bearingChanged', 'imageChanged');
 
-	        surface.call(draw);
-	    }
+	var _loadViewerPromise$2;
 
+	var _mlyActiveImage;
 
-	    behavior.off = function(surface) {
-	        surface.call(draw.off);
-	    };
+	var _mlyCache;
 
+	var _mlyFallback = false;
 
-	    behavior.cancel = function() {
-	        window.setTimeout(function() {
-	            context.map().dblclickZoomEnable(true);
-	        }, 1000);
+	var _mlyHighlightedDetection;
 
-	        context.enter(modeBrowse(context));
-	    };
+	var _mlyShowFeatureDetections = false;
+	var _mlyShowSignDetections = false;
 
+	var _mlyViewer;
 
-	    return utilRebind(behavior, dispatch$1, 'on');
-	}
+	var _mlyViewerFilter = ['all']; // Load all data for the specified type from Mapillary vector tiles
 
-	function behaviorHash(context) {
+	function loadTiles$2(which, url, maxZoom, projection) {
+	  var tiler = utilTiler().zoomExtent([minZoom$1, maxZoom]).skipNullIsland(true);
+	  var tiles = tiler.getTiles(projection);
+	  tiles.forEach(function (tile) {
+	    loadTile$1(which, url, tile);
+	  });
+	} // Load all data for the specified type from one vector tile
+
+
+	function loadTile$1(which, url, tile) {
+	  var cache = _mlyCache.requests;
+	  var tileId = "".concat(tile.id, "-").concat(which);
+	  if (cache.loaded[tileId] || cache.inflight[tileId]) return;
+	  var controller = new AbortController();
+	  cache.inflight[tileId] = controller;
+	  var requestUrl = url.replace('{x}', tile.xyz[0]).replace('{y}', tile.xyz[1]).replace('{z}', tile.xyz[2]);
+	  fetch(requestUrl, {
+	    signal: controller.signal
+	  }).then(function (response) {
+	    if (!response.ok) {
+	      throw new Error(response.status + ' ' + response.statusText);
+	    }
+
+	    cache.loaded[tileId] = true;
+	    delete cache.inflight[tileId];
+	    return response.arrayBuffer();
+	  }).then(function (data) {
+	    if (!data) {
+	      throw new Error('No Data');
+	    }
+
+	    loadTileDataToCache(data, tile, which);
+
+	    if (which === 'images') {
+	      dispatch$4.call('loadedImages');
+	    } else if (which === 'signs') {
+	      dispatch$4.call('loadedSigns');
+	    } else if (which === 'points') {
+	      dispatch$4.call('loadedMapFeatures');
+	    }
+	  })["catch"](function () {
+	    cache.loaded[tileId] = true;
+	    delete cache.inflight[tileId];
+	  });
+	} // Load the data from the vector tile into cache
 
-	    // cached window.location.hash
-	    var _cachedHash = null;
-	    // allowable latitude range
-	    var _latitudeLimit = 90 - 1e-8;
-
-	    function computedHashParameters() {
-	        var map = context.map();
-	        var center = map.center();
-	        var zoom = map.zoom();
-	        var precision = Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
-	        var oldParams = utilObjectOmit(utilStringQs(window.location.hash),
-	            ['comment', 'source', 'hashtags', 'walkthrough']
-	        );
-	        var newParams = {};
 
-	        delete oldParams.id;
-	        var selected = context.selectedIDs().filter(function(id) {
-	            return context.hasEntity(id);
-	        });
-	        if (selected.length) {
-	            newParams.id = selected.join(',');
-	        }
+	function loadTileDataToCache(data, tile, which) {
+	  var vectorTile = new VectorTile(new pbf(data));
+	  var features, cache, layer, i, feature, loc, d;
 
-	        newParams.map = zoom.toFixed(2) +
-	            '/' + center[1].toFixed(precision) +
-	            '/' + center[0].toFixed(precision);
+	  if (vectorTile.layers.hasOwnProperty('image')) {
+	    features = [];
+	    cache = _mlyCache.images;
+	    layer = vectorTile.layers.image;
 
-	        return Object.assign(oldParams, newParams);
+	    for (i = 0; i < layer.length; i++) {
+	      feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
+	      loc = feature.geometry.coordinates;
+	      d = {
+	        loc: loc,
+	        captured_at: feature.properties.captured_at,
+	        ca: feature.properties.compass_angle,
+	        id: feature.properties.id,
+	        is_pano: feature.properties.is_pano,
+	        sequence_id: feature.properties.sequence_id
+	      };
+	      cache.forImageId[d.id] = d;
+	      features.push({
+	        minX: loc[0],
+	        minY: loc[1],
+	        maxX: loc[0],
+	        maxY: loc[1],
+	        data: d
+	      });
 	    }
 
-	    function computedHash() {
-	        return '#' + utilQsString(computedHashParameters(), true);
+	    if (cache.rtree) {
+	      cache.rtree.load(features);
 	    }
+	  }
 
-	    function computedTitle(includeChangeCount) {
-
-	        var baseTitle = context.documentTitleBase() || 'iD';
-	        var contextual;
-	        var changeCount;
-	        var titleID;
-
-	        var selected = context.selectedIDs().filter(function(id) {
-	            return context.hasEntity(id);
-	        });
-	        if (selected.length) {
-	            var firstLabel = utilDisplayLabel(context.entity(selected[0]), context.graph());
-	            if (selected.length > 1 ) {
-	                contextual = _t('title.labeled_and_more', {
-	                    labeled: firstLabel,
-	                    count: (selected.length - 1).toString()
-	                });
-	            } else {
-	                contextual = firstLabel;
-	            }
-	            titleID = 'context';
-	        }
-
-	        if (includeChangeCount) {
-	            changeCount = context.history().difference().summary().length;
-	            if (changeCount > 0) {
-	                titleID = contextual ? 'changes_context' : 'changes';
-	            }
-	        }
+	  if (vectorTile.layers.hasOwnProperty('sequence')) {
+	    features = [];
+	    cache = _mlyCache.sequences;
+	    layer = vectorTile.layers.sequence;
 
-	        if (titleID) {
-	            return _t('title.format.' + titleID, {
-	                changes: changeCount,
-	                base: baseTitle,
-	                context: contextual
-	            });
-	        }
+	    for (i = 0; i < layer.length; i++) {
+	      feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
 
-	        return baseTitle;
+	      if (cache.lineString[feature.properties.id]) {
+	        cache.lineString[feature.properties.id].push(feature);
+	      } else {
+	        cache.lineString[feature.properties.id] = [feature];
+	      }
 	    }
+	  }
 
-	    function updateTitle(includeChangeCount) {
-	        if (!context.setsDocumentTitle()) { return; }
+	  if (vectorTile.layers.hasOwnProperty('point')) {
+	    features = [];
+	    cache = _mlyCache[which];
+	    layer = vectorTile.layers.point;
 
-	        var newTitle = computedTitle(includeChangeCount);
-	        if (document.title !== newTitle) {
-	            document.title = newTitle;
-	        }
+	    for (i = 0; i < layer.length; i++) {
+	      feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
+	      loc = feature.geometry.coordinates;
+	      d = {
+	        loc: loc,
+	        id: feature.properties.id,
+	        first_seen_at: feature.properties.first_seen_at,
+	        last_seen_at: feature.properties.last_seen_at,
+	        value: feature.properties.value
+	      };
+	      features.push({
+	        minX: loc[0],
+	        minY: loc[1],
+	        maxX: loc[0],
+	        maxY: loc[1],
+	        data: d
+	      });
 	    }
 
-	    function updateHashIfNeeded() {
-	        if (context.inIntro()) { return; }
-
-	        var latestHash = computedHash();
-	        if (_cachedHash !== latestHash) {
-	            _cachedHash = latestHash;
-
-	            // Update the URL hash without affecting the browser navigation stack,
-	            // though unavoidably creating a browser history entry
-	            window.history.replaceState(null, computedTitle(false /* includeChangeCount */), latestHash);
-
-	            // set the title we want displayed for the browser tab/window
-	            updateTitle(true /* includeChangeCount */);
-	        }
+	    if (cache.rtree) {
+	      cache.rtree.load(features);
 	    }
+	  }
 
-	    var _throttledUpdate = throttle(updateHashIfNeeded, 500);
-	    var _throttledUpdateTitle = throttle(function() {
-	        updateTitle(true /* includeChangeCount */);
-	    }, 500);
-
-	    function hashchange() {
-
-	        // ignore spurious hashchange events
-	        if (window.location.hash === _cachedHash) { return; }
-
-	        _cachedHash = window.location.hash;
-
-	        var q = utilStringQs(_cachedHash);
-	        var mapArgs = (q.map || '').split('/').map(Number);
-
-	        if (mapArgs.length < 3 || mapArgs.some(isNaN)) {
-	            // replace bogus hash
-	            updateHashIfNeeded();
-
-	        } else {
-	            // don't update if the new hash already reflects the state of iD
-	            if (_cachedHash === computedHash()) { return; }
-
-	            var mode = context.mode();
+	  if (vectorTile.layers.hasOwnProperty('traffic_sign')) {
+	    features = [];
+	    cache = _mlyCache[which];
+	    layer = vectorTile.layers.traffic_sign;
 
-	            context.map().centerZoom([mapArgs[2], Math.min(_latitudeLimit, Math.max(-_latitudeLimit, mapArgs[1]))], mapArgs[0]);
+	    for (i = 0; i < layer.length; i++) {
+	      feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
+	      loc = feature.geometry.coordinates;
+	      d = {
+	        loc: loc,
+	        id: feature.properties.id,
+	        first_seen_at: feature.properties.first_seen_at,
+	        last_seen_at: feature.properties.last_seen_at,
+	        value: feature.properties.value
+	      };
+	      features.push({
+	        minX: loc[0],
+	        minY: loc[1],
+	        maxX: loc[0],
+	        maxY: loc[1],
+	        data: d
+	      });
+	    }
 
-	            if (q.id) {
-	                var ids = q.id.split(',').filter(function(id) {
-	                    return context.hasEntity(id);
-	                });
-	                var skip = mode && mode.id === 'select' && utilArrayIdentical(mode.selectedIDs(), ids);
-	                if (ids.length && !skip) {
-	                    context.enter(modeSelect(context, ids));
-	                    return;
-	                }
-	            }
+	    if (cache.rtree) {
+	      cache.rtree.load(features);
+	    }
+	  }
+	} // Get data from the API
 
-	            var center = context.map().center();
-	            var dist = geoSphericalDistance(center, [mapArgs[2], mapArgs[1]]);
-	            var maxdist = 500;
 
-	            // Don't allow the hash location to change too much while drawing
-	            // This can happen if the user accidentally hit the back button.  #3996
-	            if (mode && mode.id.match(/^draw/) !== null && dist > maxdist) {
-	                context.enter(modeBrowse(context));
-	                return;
-	            }
-	        }
+	function loadData(url) {
+	  return fetch(url).then(function (response) {
+	    if (!response.ok) {
+	      throw new Error(response.status + ' ' + response.statusText);
 	    }
 
-	    function behavior() {
-	        context.map()
-	            .on('move.behaviorHash', _throttledUpdate);
-
-	        context.history()
-	            .on('change.behaviorHash', _throttledUpdateTitle);
+	    return response.json();
+	  }).then(function (result) {
+	    if (!result) {
+	      return [];
+	    }
 
-	        context
-	            .on('enter.behaviorHash', _throttledUpdate);
+	    return result.data || [];
+	  });
+	} // Partition viewport into higher zoom tiles
 
-	        select(window)
-	            .on('hashchange.behaviorHash', hashchange);
 
-	        if (window.location.hash) {
-	            var q = utilStringQs(window.location.hash);
+	function partitionViewport$2(projection) {
+	  var z = geoScaleToZoom(projection.scale());
+	  var z2 = Math.ceil(z * 2) / 2 + 2.5; // round to next 0.5 and add 2.5
 
-	            if (q.id) {
-	                //if (!context.history().hasRestorableChanges()) {
-	                    // targeting specific features: download, select, and zoom to them
-	                    context.zoomToEntity(q.id.split(',')[0], !q.map);
-	                //}
-	            }
+	  var tiler = utilTiler().zoomExtent([z2, z2]);
+	  return tiler.getTiles(projection).map(function (tile) {
+	    return tile.extent;
+	  });
+	} // Return no more than `limit` results per partition.
 
-	            if (q.walkthrough === 'true') {
-	                behavior.startWalkthrough = true;
-	            }
 
-	            if (q.map) {
-	                behavior.hadHash = true;
-	            }
+	function searchLimited$2(limit, projection, rtree) {
+	  limit = limit || 5;
+	  return partitionViewport$2(projection).reduce(function (result, extent) {
+	    var found = rtree.search(extent.bbox()).slice(0, limit).map(function (d) {
+	      return d.data;
+	    });
+	    return found.length ? result.concat(found) : result;
+	  }, []);
+	}
 
-	            hashchange();
+	var serviceMapillary = {
+	  // Initialize Mapillary
+	  init: function init() {
+	    if (!_mlyCache) {
+	      this.reset();
+	    }
 
-	            updateTitle(false);
-	        }
+	    this.event = utilRebind(this, dispatch$4, 'on');
+	  },
+	  // Reset cache and state
+	  reset: function reset() {
+	    if (_mlyCache) {
+	      Object.values(_mlyCache.requests.inflight).forEach(function (request) {
+	        request.abort();
+	      });
 	    }
 
-	    behavior.off = function() {
-	        _throttledUpdate.cancel();
-	        _throttledUpdateTitle.cancel();
+	    _mlyCache = {
+	      images: {
+	        rtree: new RBush(),
+	        forImageId: {}
+	      },
+	      image_detections: {
+	        forImageId: {}
+	      },
+	      signs: {
+	        rtree: new RBush()
+	      },
+	      points: {
+	        rtree: new RBush()
+	      },
+	      sequences: {
+	        rtree: new RBush(),
+	        lineString: {}
+	      },
+	      requests: {
+	        loaded: {},
+	        inflight: {}
+	      }
+	    };
+	    _mlyActiveImage = null;
+	  },
+	  // Get visible images
+	  images: function images(projection) {
+	    var limit = 5;
+	    return searchLimited$2(limit, projection, _mlyCache.images.rtree);
+	  },
+	  // Get visible traffic signs
+	  signs: function signs(projection) {
+	    var limit = 5;
+	    return searchLimited$2(limit, projection, _mlyCache.signs.rtree);
+	  },
+	  // Get visible map (point) features
+	  mapFeatures: function mapFeatures(projection) {
+	    var limit = 5;
+	    return searchLimited$2(limit, projection, _mlyCache.points.rtree);
+	  },
+	  // Get cached image by id
+	  cachedImage: function cachedImage(imageId) {
+	    return _mlyCache.images.forImageId[imageId];
+	  },
+	  // Get visible sequences
+	  sequences: function sequences(projection) {
+	    var viewport = projection.clipExtent();
+	    var min = [viewport[0][0], viewport[1][1]];
+	    var max = [viewport[1][0], viewport[0][1]];
+	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	    var sequenceIds = {};
+	    var lineStrings = [];
 
-	        context.map()
-	            .on('move.behaviorHash', null);
+	    _mlyCache.images.rtree.search(bbox).forEach(function (d) {
+	      if (d.data.sequence_id) {
+	        sequenceIds[d.data.sequence_id] = true;
+	      }
+	    });
 
-	        context
-	            .on('enter.behaviorHash', null);
+	    Object.keys(sequenceIds).forEach(function (sequenceId) {
+	      if (_mlyCache.sequences.lineString[sequenceId]) {
+	        lineStrings = lineStrings.concat(_mlyCache.sequences.lineString[sequenceId]);
+	      }
+	    });
+	    return lineStrings;
+	  },
+	  // Load images in the visible area
+	  loadImages: function loadImages(projection) {
+	    loadTiles$2('images', tileUrl, 14, projection);
+	  },
+	  // Load traffic signs in the visible area
+	  loadSigns: function loadSigns(projection) {
+	    loadTiles$2('signs', trafficSignTileUrl, 14, projection);
+	  },
+	  // Load map (point) features in the visible area
+	  loadMapFeatures: function loadMapFeatures(projection) {
+	    loadTiles$2('points', mapFeatureTileUrl, 14, projection);
+	  },
+	  // Return a promise that resolves when the image viewer (Mapillary JS) library has finished loading
+	  ensureViewerLoaded: function ensureViewerLoaded(context) {
+	    if (_loadViewerPromise$2) return _loadViewerPromise$2; // add mly-wrapper
 
-	        select(window)
-	            .on('hashchange.behaviorHash', null);
+	    var wrap = context.container().select('.photoviewer').selectAll('.mly-wrapper').data([0]);
+	    wrap.enter().append('div').attr('id', 'ideditor-mly').attr('class', 'photo-wrapper mly-wrapper').classed('hide', true);
+	    var that = this;
+	    _loadViewerPromise$2 = new Promise(function (resolve, reject) {
+	      var loadedCount = 0;
 
-	        window.location.hash = '';
-	    };
+	      function loaded() {
+	        loadedCount += 1; // wait until both files are loaded
 
-	    return behavior;
-	}
+	        if (loadedCount === 2) resolve();
+	      }
 
-	/*
-	    iD.coreDifference represents the difference between two graphs.
-	    It knows how to calculate the set of entities that were
-	    created, modified, or deleted, and also contains the logic
-	    for recursively extending a difference to the complete set
-	    of entities that will require a redraw, taking into account
-	    child and parent relationships.
-	 */
-	function coreDifference(base, head) {
-	    var _changes = {};
-	    var _didChange = {};  // 'addition', 'deletion', 'geometry', 'properties'
-	    var _diff = {};
+	      var head = select('head'); // load mapillary-viewercss
 
-	    function checkEntityID(id) {
-	        var h = head.entities[id];
-	        var b = base.entities[id];
+	      head.selectAll('#ideditor-mapillary-viewercss').data([0]).enter().append('link').attr('id', 'ideditor-mapillary-viewercss').attr('rel', 'stylesheet').attr('crossorigin', 'anonymous').attr('href', context.asset(viewercss)).on('load.serviceMapillary', loaded).on('error.serviceMapillary', function () {
+	        reject();
+	      }); // load mapillary-viewerjs
 
-	        if (h === b) { return; }
-	        if (_changes[id]) { return; }
+	      head.selectAll('#ideditor-mapillary-viewerjs').data([0]).enter().append('script').attr('id', 'ideditor-mapillary-viewerjs').attr('crossorigin', 'anonymous').attr('src', context.asset(viewerjs)).on('load.serviceMapillary', loaded).on('error.serviceMapillary', function () {
+	        reject();
+	      });
+	    })["catch"](function () {
+	      _loadViewerPromise$2 = null;
+	    }).then(function () {
+	      that.initViewer(context);
+	    });
+	    return _loadViewerPromise$2;
+	  },
+	  // Load traffic sign image sprites
+	  loadSignResources: function loadSignResources(context) {
+	    context.ui().svgDefs.addSprites(['mapillary-sprite'], false
+	    /* don't override colors */
+	    );
+	    return this;
+	  },
+	  // Load map (point) feature image sprites
+	  loadObjectResources: function loadObjectResources(context) {
+	    context.ui().svgDefs.addSprites(['mapillary-object-sprite'], false
+	    /* don't override colors */
+	    );
+	    return this;
+	  },
+	  // Remove previous detections in image viewer
+	  resetTags: function resetTags() {
+	    if (_mlyViewer && !_mlyFallback) {
+	      _mlyViewer.getComponent('tag').removeAll();
+	    }
+	  },
+	  // Show map feature detections in image viewer
+	  showFeatureDetections: function showFeatureDetections(value) {
+	    _mlyShowFeatureDetections = value;
 
-	        if (!h && b) {
-	            _changes[id] = { base: b, head: h };
-	            _didChange.deletion = true;
-	            return;
-	        }
-	        if (h && !b) {
-	            _changes[id] = { base: b, head: h };
-	            _didChange.addition = true;
-	            return;
-	        }
+	    if (!_mlyShowFeatureDetections && !_mlyShowSignDetections) {
+	      this.resetTags();
+	    }
+	  },
+	  // Show traffic sign detections in image viewer
+	  showSignDetections: function showSignDetections(value) {
+	    _mlyShowSignDetections = value;
 
-	        if (h && b) {
-	            if (h.members && b.members && !fastDeepEqual(h.members, b.members)) {
-	                _changes[id] = { base: b, head: h };
-	                _didChange.geometry = true;
-	                _didChange.properties = true;
-	                return;
-	            }
-	            if (h.loc && b.loc && !geoVecEqual(h.loc, b.loc)) {
-	                _changes[id] = { base: b, head: h };
-	                _didChange.geometry = true;
-	            }
-	            if (h.nodes && b.nodes && !fastDeepEqual(h.nodes, b.nodes)) {
-	                _changes[id] = { base: b, head: h };
-	                _didChange.geometry = true;
-	            }
-	            if (h.tags && b.tags && !fastDeepEqual(h.tags, b.tags)) {
-	                _changes[id] = { base: b, head: h };
-	                _didChange.properties = true;
-	            }
-	        }
+	    if (!_mlyShowFeatureDetections && !_mlyShowSignDetections) {
+	      this.resetTags();
 	    }
+	  },
+	  // Apply filter to image viewer
+	  filterViewer: function filterViewer(context) {
+	    var showsPano = context.photos().showsPanoramic();
+	    var showsFlat = context.photos().showsFlat();
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
+	    var filter = ['all'];
+	    if (!showsPano) filter.push(['!=', 'cameraType', 'spherical']);
+	    if (!showsFlat && showsPano) filter.push(['==', 'pano', true]);
 
-	    function load() {
-	        // HOT CODE: there can be many thousands of downloaded entities, so looping
-	        // through them all can become a performance bottleneck. Optimize by
-	        // resolving duplicates and using a basic `for` loop
-	        var ids = utilArrayUniq(Object.keys(head.entities).concat(Object.keys(base.entities)));
-	        for (var i = 0; i < ids.length; i++) {
-	            checkEntityID(ids[i]);
-	        }
+	    if (fromDate) {
+	      filter.push(['>=', 'capturedAt', new Date(fromDate).getTime()]);
 	    }
-	    load();
 
+	    if (toDate) {
+	      filter.push(['>=', 'capturedAt', new Date(toDate).getTime()]);
+	    }
 
-	    _diff.length = function length() {
-	        return Object.keys(_changes).length;
-	    };
+	    if (_mlyViewer) {
+	      _mlyViewer.setFilter(filter);
+	    }
 
+	    _mlyViewerFilter = filter;
+	    return filter;
+	  },
+	  // Make the image viewer visible
+	  showViewer: function showViewer(context) {
+	    var wrap = context.container().select('.photoviewer').classed('hide', false);
+	    var isHidden = wrap.selectAll('.photo-wrapper.mly-wrapper.hide').size();
 
-	    _diff.changes = function changes() {
-	        return _changes;
-	    };
+	    if (isHidden && _mlyViewer) {
+	      wrap.selectAll('.photo-wrapper:not(.mly-wrapper)').classed('hide', true);
+	      wrap.selectAll('.photo-wrapper.mly-wrapper').classed('hide', false);
 
-	    _diff.didChange = _didChange;
+	      _mlyViewer.resize();
+	    }
 
+	    return this;
+	  },
+	  // Hide the image viewer and resets map markers
+	  hideViewer: function hideViewer(context) {
+	    _mlyActiveImage = null;
 
-	    // pass true to include affected relation members
-	    _diff.extantIDs = function extantIDs(includeRelMembers) {
-	        var result = new Set();
-	        Object.keys(_changes).forEach(function(id) {
-	            if (_changes[id].head) {
-	                result.add(id);
-	            }
+	    if (!_mlyFallback && _mlyViewer) {
+	      _mlyViewer.getComponent('sequence').stop();
+	    }
 
-	            var h = _changes[id].head;
-	            var b = _changes[id].base;
-	            var entity = h || b;
+	    var viewer = context.container().select('.photoviewer');
+	    if (!viewer.empty()) viewer.datum(null);
+	    viewer.classed('hide', true).selectAll('.photo-wrapper').classed('hide', true);
+	    this.updateUrlImage(null);
+	    dispatch$4.call('imageChanged');
+	    dispatch$4.call('loadedMapFeatures');
+	    dispatch$4.call('loadedSigns');
+	    return this.setStyles(context, null);
+	  },
+	  // Update the URL with current image id
+	  updateUrlImage: function updateUrlImage(imageId) {
+	    if (!window.mocha) {
+	      var hash = utilStringQs(window.location.hash);
 
-	            if (includeRelMembers && entity.type === 'relation') {
-	                var mh = h ? h.members.map(function(m) { return m.id; }) : [];
-	                var mb = b ? b.members.map(function(m) { return m.id; }) : [];
-	                utilArrayUnion(mh, mb).forEach(function(memberID) {
-	                    if (head.hasEntity(memberID)) {
-	                        result.add(memberID);
-	                    }
-	                });
-	            }
-	        });
+	      if (imageId) {
+	        hash.photo = 'mapillary/' + imageId;
+	      } else {
+	        delete hash.photo;
+	      }
 
-	        return Array.from(result);
-	    };
+	      window.location.replace('#' + utilQsString(hash, true));
+	    }
+	  },
+	  // Highlight the detection in the viewer that is related to the clicked map feature
+	  highlightDetection: function highlightDetection(detection) {
+	    if (detection) {
+	      _mlyHighlightedDetection = detection.id;
+	    }
 
+	    return this;
+	  },
+	  // Initialize image viewer (Mapillar JS)
+	  initViewer: function initViewer(context) {
+	    var that = this;
+	    if (!window.mapillary) return;
+	    var opts = {
+	      accessToken: accessToken,
+	      component: {
+	        cover: false,
+	        keyboard: false,
+	        tag: true
+	      },
+	      container: 'ideditor-mly'
+	    }; // Disable components requiring WebGL support
+
+	    if (!mapillary.isSupported() && mapillary.isFallbackSupported()) {
+	      _mlyFallback = true;
+	      opts.component = {
+	        cover: false,
+	        direction: false,
+	        imagePlane: false,
+	        keyboard: false,
+	        mouse: false,
+	        sequence: false,
+	        tag: false,
+	        image: true,
+	        // fallback
+	        navigation: true // fallback
 
-	    _diff.modified = function modified() {
-	        var result = [];
-	        Object.values(_changes).forEach(function(change) {
-	            if (change.base && change.head) {
-	                result.push(change.head);
-	            }
-	        });
-	        return result;
-	    };
+	      };
+	    }
 
+	    _mlyViewer = new mapillary.Viewer(opts);
 
-	    _diff.created = function created() {
-	        var result = [];
-	        Object.values(_changes).forEach(function(change) {
-	            if (!change.base && change.head) {
-	                result.push(change.head);
-	            }
-	        });
-	        return result;
-	    };
+	    _mlyViewer.on('image', imageChanged);
 
+	    _mlyViewer.on('bearing', bearingChanged);
 
-	    _diff.deleted = function deleted() {
-	        var result = [];
-	        Object.values(_changes).forEach(function(change) {
-	            if (change.base && !change.head) {
-	                result.push(change.base);
-	            }
-	        });
-	        return result;
-	    };
+	    if (_mlyViewerFilter) {
+	      _mlyViewer.setFilter(_mlyViewerFilter);
+	    } // Register viewer resize handler
 
 
-	    _diff.summary = function summary() {
-	        var relevant = {};
+	    context.ui().photoviewer.on('resize.mapillary', function () {
+	      if (_mlyViewer) _mlyViewer.resize();
+	    }); // imageChanged: called after the viewer has changed images and is ready.
 
-	        var keys = Object.keys(_changes);
-	        for (var i = 0; i < keys.length; i++) {
-	            var change = _changes[keys[i]];
+	    function imageChanged(node) {
+	      that.resetTags();
+	      var image = node.image;
+	      that.setActiveImage(image);
+	      that.setStyles(context, null);
+	      var loc = [image.originalLngLat.lng, image.originalLngLat.lat];
+	      context.map().centerEase(loc);
+	      that.updateUrlImage(image.id);
 
-	            if (change.head && change.head.geometry(head) !== 'vertex') {
-	                addEntity(change.head, head, change.base ? 'modified' : 'created');
+	      if (_mlyShowFeatureDetections || _mlyShowSignDetections) {
+	        that.updateDetections(image.id, "".concat(apiUrl, "/").concat(image.id, "/detections?access_token=").concat(accessToken, "&fields=id,image,geometry,value"));
+	      }
 
-	            } else if (change.base && change.base.geometry(base) !== 'vertex') {
-	                addEntity(change.base, base, 'deleted');
+	      dispatch$4.call('imageChanged');
+	    } // bearingChanged: called when the bearing changes in the image viewer.
 
-	            } else if (change.base && change.head) { // modified vertex
-	                var moved    = !fastDeepEqual(change.base.loc,  change.head.loc);
-	                var retagged = !fastDeepEqual(change.base.tags, change.head.tags);
 
-	                if (moved) {
-	                    addParents(change.head);
-	                }
+	    function bearingChanged(e) {
+	      dispatch$4.call('bearingChanged', undefined, e);
+	    }
+	  },
+	  // Move to an image
+	  selectImage: function selectImage(context, imageId) {
+	    if (_mlyViewer && imageId) {
+	      _mlyViewer.moveTo(imageId)["catch"](function (e) {
+	        console.error('mly3', e); // eslint-disable-line no-console
+	      });
+	    }
 
-	                if (retagged || (moved && change.head.hasInterestingTags())) {
-	                    addEntity(change.head, head, 'modified');
-	                }
+	    return this;
+	  },
+	  // Return the currently displayed image
+	  getActiveImage: function getActiveImage() {
+	    return _mlyActiveImage;
+	  },
+	  // Return a list of detection objects for the given id
+	  getDetections: function getDetections(id) {
+	    return loadData("".concat(apiUrl, "/").concat(id, "/detections?access_token=").concat(accessToken, "&fields=id,value,image"));
+	  },
+	  // Set the currently visible image
+	  setActiveImage: function setActiveImage(image) {
+	    if (image) {
+	      _mlyActiveImage = {
+	        ca: image.originalCompassAngle,
+	        id: image.id,
+	        loc: [image.originalLngLat.lng, image.originalLngLat.lat],
+	        is_pano: image.cameraType === 'spherical',
+	        sequence_id: image.sequenceId
+	      };
+	    } else {
+	      _mlyActiveImage = null;
+	    }
+	  },
+	  // Update the currently highlighted sequence and selected bubble.
+	  setStyles: function setStyles(context, hovered) {
+	    var hoveredImageId = hovered && hovered.id;
+	    var hoveredSequenceId = hovered && hovered.sequence_id;
+	    var selectedSequenceId = _mlyActiveImage && _mlyActiveImage.sequence_id;
+	    context.container().selectAll('.layer-mapillary .viewfield-group').classed('highlighted', function (d) {
+	      return d.sequence_id === selectedSequenceId || d.id === hoveredImageId;
+	    }).classed('hovered', function (d) {
+	      return d.id === hoveredImageId;
+	    });
+	    context.container().selectAll('.layer-mapillary .sequence').classed('highlighted', function (d) {
+	      return d.properties.id === hoveredSequenceId;
+	    }).classed('currentView', function (d) {
+	      return d.properties.id === selectedSequenceId;
+	    });
+	    return this;
+	  },
+	  // Get detections for the current image and shows them in the image viewer
+	  updateDetections: function updateDetections(imageId, url) {
+	    if (!_mlyViewer || _mlyFallback) return;
+	    if (!imageId) return;
+	    var cache = _mlyCache.image_detections;
+
+	    if (cache.forImageId[imageId]) {
+	      showDetections(_mlyCache.image_detections.forImageId[imageId]);
+	    } else {
+	      loadData(url).then(function (detections) {
+	        detections.forEach(function (detection) {
+	          if (!cache.forImageId[imageId]) {
+	            cache.forImageId[imageId] = [];
+	          }
 
-	            } else if (change.head && change.head.hasInterestingTags()) { // created vertex
-	                addEntity(change.head, head, 'created');
+	          cache.forImageId[imageId].push({
+	            geometry: detection.geometry,
+	            id: detection.id,
+	            image_id: imageId,
+	            value: detection.value
+	          });
+	        });
+	        showDetections(_mlyCache.image_detections.forImageId[imageId] || []);
+	      });
+	    } // Create a tag for each detection and shows it in the image viewer
 
-	            } else if (change.base && change.base.hasInterestingTags()) { // deleted vertex
-	                addEntity(change.base, base, 'deleted');
-	            }
-	        }
 
-	        return Object.values(relevant);
+	    function showDetections(detections) {
+	      var tagComponent = _mlyViewer.getComponent('tag');
 
+	      detections.forEach(function (data) {
+	        var tag = makeTag(data);
 
-	        function addEntity(entity, graph, changeType) {
-	            relevant[entity.id] = {
-	                entity: entity,
-	                graph: graph,
-	                changeType: changeType
-	            };
+	        if (tag) {
+	          tagComponent.add([tag]);
 	        }
+	      });
+	    } // Create a Mapillary JS tag object
 
-	        function addParents(entity) {
-	            var parents = head.parentWays(entity);
-	            for (var j = parents.length - 1; j >= 0; j--) {
-	                var parent = parents[j];
-	                if (!(parent.id in relevant)) {
-	                    addEntity(parent, head, 'modified');
-	                }
-	            }
-	        }
-	    };
 
+	    function makeTag(data) {
+	      var valueParts = data.value.split('--');
+	      if (!valueParts.length) return;
+	      var tag;
+	      var text;
+	      var color = 0xffffff;
 
-	    // returns complete set of entities that require a redraw
-	    //  (optionally within given `extent`)
-	    _diff.complete = function complete(extent) {
-	        var result = {};
-	        var id, change;
+	      if (_mlyHighlightedDetection === data.id) {
+	        color = 0xffff00;
+	        text = valueParts[1];
 
-	        for (id in _changes) {
-	            change = _changes[id];
+	        if (text === 'flat' || text === 'discrete' || text === 'sign') {
+	          text = valueParts[2];
+	        }
 
-	            var h = change.head;
-	            var b = change.base;
-	            var entity = h || b;
-	            var i;
+	        text = text.replace(/-/g, ' ');
+	        text = text.charAt(0).toUpperCase() + text.slice(1);
+	        _mlyHighlightedDetection = null;
+	      }
 
-	            if (extent &&
-	                (!h || !h.intersects(extent, head)) &&
-	                (!b || !b.intersects(extent, base)))
-	                { continue; }
+	      var decodedGeometry = window.atob(data.geometry);
+	      var uintArray = new Uint8Array(decodedGeometry.length);
 
-	            result[id] = h;
+	      for (var i = 0; i < decodedGeometry.length; i++) {
+	        uintArray[i] = decodedGeometry.charCodeAt(i);
+	      }
 
-	            if (entity.type === 'way') {
-	                var nh = h ? h.nodes : [];
-	                var nb = b ? b.nodes : [];
-	                var diff;
+	      var tile = new VectorTile(new pbf(uintArray.buffer));
+	      var layer = tile.layers['mpy-or'];
+	      var geometries = layer.feature(0).loadGeometry();
+	      var polygon = geometries.map(function (ring) {
+	        return ring.map(function (point) {
+	          return [point.x / layer.extent, point.y / layer.extent];
+	        });
+	      });
+	      tag = new mapillary.OutlineTag(data.id, new mapillary.PolygonGeometry(polygon[0]), {
+	        text: text,
+	        textColor: color,
+	        lineColor: color,
+	        lineWidth: 2,
+	        fillColor: color,
+	        fillOpacity: 0.3
+	      });
+	      return tag;
+	    }
+	  },
+	  // Return the current cache
+	  cache: function cache() {
+	    return _mlyCache;
+	  }
+	};
 
-	                diff = utilArrayDifference(nh, nb);
-	                for (i = 0; i < diff.length; i++) {
-	                    result[diff[i]] = head.hasEntity(diff[i]);
-	                }
+	function validationIssue(attrs) {
+	  this.type = attrs.type; // required - name of rule that created the issue (e.g. 'missing_tag')
 
-	                diff = utilArrayDifference(nb, nh);
-	                for (i = 0; i < diff.length; i++) {
-	                    result[diff[i]] = head.hasEntity(diff[i]);
-	                }
-	            }
+	  this.subtype = attrs.subtype; // optional - category of the issue within the type (e.g. 'relation_type' under 'missing_tag')
 
-	            if (entity.type === 'relation' && entity.isMultipolygon()) {
-	                var mh = h ? h.members.map(function(m) { return m.id; }) : [];
-	                var mb = b ? b.members.map(function(m) { return m.id; }) : [];
-	                var ids = utilArrayUnion(mh, mb);
-	                for (i = 0; i < ids.length; i++) {
-	                    var member = head.hasEntity(ids[i]);
-	                    if (!member) { continue; }   // not downloaded
-	                    if (extent && !member.intersects(extent, head)) { continue; }   // not visible
-	                    result[ids[i]] = member;
-	                }
-	            }
+	  this.severity = attrs.severity; // required - 'warning' or 'error'
 
-	            addParents(head.parentWays(entity), result);
-	            addParents(head.parentRelations(entity), result);
-	        }
+	  this.message = attrs.message; // required - function returning localized string
 
-	        return result;
+	  this.reference = attrs.reference; // optional - function(selection) to render reference information
 
+	  this.entityIds = attrs.entityIds; // optional - array of IDs of entities involved in the issue
 
-	        function addParents(parents, result) {
-	            for (var i = 0; i < parents.length; i++) {
-	                var parent = parents[i];
-	                if (parent.id in result) { continue; }
+	  this.loc = attrs.loc; // optional - [lon, lat] to zoom in on to see the issue
 
-	                result[parent.id] = parent;
-	                addParents(head.parentRelations(parent), result);
-	            }
-	        }
-	    };
+	  this.data = attrs.data; // optional - object containing extra data for the fixes
 
+	  this.dynamicFixes = attrs.dynamicFixes; // optional - function(context) returning fixes
 
-	    return _diff;
-	}
+	  this.hash = attrs.hash; // optional - string to further differentiate the issue
 
-	function coreTree(head) {
-	    // tree for entities
-	    var _rtree = new RBush();
-	    var _bboxes = {};
+	  this.id = generateID.apply(this); // generated - see below
 
-	    // maintain a separate tree for granular way segments
-	    var _segmentsRTree = new RBush();
-	    var _segmentsBBoxes = {};
-	    var _segmentsByWayId = {};
+	  this.key = generateKey.apply(this); // generated - see below (call after generating this.id)
 
-	    var tree = {};
+	  this.autoFix = null; // generated - if autofix exists, will be set below
+	  // A unique, deterministic string hash.
+	  // Issues with identical id values are considered identical.
 
+	  function generateID() {
+	    var parts = [this.type];
 
-	    function entityBBox(entity) {
-	        var bbox = entity.extent(head).bbox();
-	        bbox.id = entity.id;
-	        _bboxes[entity.id] = bbox;
-	        return bbox;
+	    if (this.hash) {
+	      // subclasses can pass in their own differentiator
+	      parts.push(this.hash);
 	    }
 
+	    if (this.subtype) {
+	      parts.push(this.subtype);
+	    } // include the entities this issue is for
+	    // (sort them so the id is deterministic)
 
-	    function segmentBBox(segment) {
-	        var extent = segment.extent(head);
-	        // extent can be null if the node entities aren't in the graph for some reason
-	        if (!extent) { return null; }
 
-	        var bbox = extent.bbox();
-	        bbox.segment = segment;
-	        _segmentsBBoxes[segment.id] = bbox;
-	        return bbox;
+	    if (this.entityIds) {
+	      var entityKeys = this.entityIds.slice().sort();
+	      parts.push.apply(parts, entityKeys);
 	    }
 
+	    return parts.join(':');
+	  } // An identifier suitable for use as the second argument to d3.selection#data().
+	  // (i.e. this should change whenever the data needs to be refreshed)
 
-	    function removeEntity(entity) {
-	        _rtree.remove(_bboxes[entity.id]);
-	        delete _bboxes[entity.id];
-
-	        if (_segmentsByWayId[entity.id]) {
-	            _segmentsByWayId[entity.id].forEach(function(segment) {
-	                _segmentsRTree.remove(_segmentsBBoxes[segment.id]);
-	                delete _segmentsBBoxes[segment.id];
-	            });
-	            delete _segmentsByWayId[entity.id];
-	        }
-	    }
 
+	  function generateKey() {
+	    return this.id + ':' + Date.now().toString(); // include time of creation
+	  }
 
-	    function loadEntities(entities) {
-	        _rtree.load(entities.map(entityBBox));
+	  this.extent = function (resolver) {
+	    if (this.loc) {
+	      return geoExtent(this.loc);
+	    }
 
-	        var segments = [];
-	        entities.forEach(function(entity) {
-	            if (entity.segments) {
-	                var entitySegments = entity.segments(head);
-	                // cache these to make them easy to remove later
-	                _segmentsByWayId[entity.id] = entitySegments;
-	                segments = segments.concat(entitySegments);
-	            }
-	        });
-	        if (segments.length) { _segmentsRTree.load(segments.map(segmentBBox).filter(Boolean)); }
+	    if (this.entityIds && this.entityIds.length) {
+	      return this.entityIds.reduce(function (extent, entityId) {
+	        return extent.extend(resolver.entity(entityId).extent(resolver));
+	      }, geoExtent());
 	    }
 
+	    return null;
+	  };
 
-	    function updateParents(entity, insertions, memo) {
-	        head.parentWays(entity).forEach(function(way) {
-	            if (_bboxes[way.id]) {
-	                removeEntity(way);
-	                insertions[way.id] = way;
-	            }
-	            updateParents(way, insertions, memo);
-	        });
+	  this.fixes = function (context) {
+	    var fixes = this.dynamicFixes ? this.dynamicFixes(context) : [];
+	    var issue = this;
 
-	        head.parentRelations(entity).forEach(function(relation) {
-	            if (memo[entity.id]) { return; }
-	            memo[entity.id] = true;
-	            if (_bboxes[relation.id]) {
-	                removeEntity(relation);
-	                insertions[relation.id] = relation;
-	            }
-	            updateParents(relation, insertions, memo);
-	        });
+	    if (issue.severity === 'warning') {
+	      // allow ignoring any issue that's not an error
+	      fixes.push(new validationIssueFix({
+	        title: _t.html('issues.fix.ignore_issue.title'),
+	        icon: 'iD-icon-close',
+	        onClick: function onClick() {
+	          context.validator().ignoreIssue(this.issue.id);
+	        }
+	      }));
 	    }
 
+	    fixes.forEach(function (fix) {
+	      // the id doesn't matter as long as it's unique to this issue/fix
+	      fix.id = fix.title; // add a reference to the issue for use in actions
 
-	    tree.rebase = function(entities, force) {
-	        var insertions = {};
-
-	        for (var i = 0; i < entities.length; i++) {
-	            var entity = entities[i];
-	            if (!entity.visible) { continue; }
+	      fix.issue = issue;
 
-	            if (head.entities.hasOwnProperty(entity.id) || _bboxes[entity.id]) {
-	                if (!force) {
-	                    continue;
-	                } else if (_bboxes[entity.id]) {
-	                    removeEntity(entity);
-	                }
-	            }
-
-	            insertions[entity.id] = entity;
-	            updateParents(entity, insertions, {});
-	        }
+	      if (fix.autoArgs) {
+	        issue.autoFix = fix;
+	      }
+	    });
+	    return fixes;
+	  };
+	}
+	function validationIssueFix(attrs) {
+	  this.title = attrs.title; // Required
 
-	        loadEntities(Object.values(insertions));
+	  this.onClick = attrs.onClick; // Optional - the function to run to apply the fix
 
-	        return tree;
-	    };
+	  this.disabledReason = attrs.disabledReason; // Optional - a string explaining why the fix is unavailable, if any
 
+	  this.icon = attrs.icon; // Optional - shows 'iD-icon-wrench' if not set
 
-	    function updateToGraph(graph) {
-	        if (graph === head) { return; }
+	  this.entityIds = attrs.entityIds || []; // Optional - used for hover-higlighting.
 
-	        var diff = coreDifference(head, graph);
+	  this.autoArgs = attrs.autoArgs; // Optional - pass [actions, annotation] arglist if this fix can automatically run
 
-	        head = graph;
+	  this.issue = null; // Generated link - added by validationIssue
+	}
 
-	        var changed = diff.didChange;
-	        if (!changed.addition && !changed.deletion && !changed.geometry) { return; }
+	var buildRuleChecks = function buildRuleChecks() {
+	  return {
+	    equals: function equals(_equals) {
+	      return function (tags) {
+	        return Object.keys(_equals).every(function (k) {
+	          return _equals[k] === tags[k];
+	        });
+	      };
+	    },
+	    notEquals: function notEquals(_notEquals) {
+	      return function (tags) {
+	        return Object.keys(_notEquals).some(function (k) {
+	          return _notEquals[k] !== tags[k];
+	        });
+	      };
+	    },
+	    absence: function absence(_absence) {
+	      return function (tags) {
+	        return Object.keys(tags).indexOf(_absence) === -1;
+	      };
+	    },
+	    presence: function presence(_presence) {
+	      return function (tags) {
+	        return Object.keys(tags).indexOf(_presence) > -1;
+	      };
+	    },
+	    greaterThan: function greaterThan(_greaterThan) {
+	      var key = Object.keys(_greaterThan)[0];
+	      var value = _greaterThan[key];
+	      return function (tags) {
+	        return tags[key] > value;
+	      };
+	    },
+	    greaterThanEqual: function greaterThanEqual(_greaterThanEqual) {
+	      var key = Object.keys(_greaterThanEqual)[0];
+	      var value = _greaterThanEqual[key];
+	      return function (tags) {
+	        return tags[key] >= value;
+	      };
+	    },
+	    lessThan: function lessThan(_lessThan) {
+	      var key = Object.keys(_lessThan)[0];
+	      var value = _lessThan[key];
+	      return function (tags) {
+	        return tags[key] < value;
+	      };
+	    },
+	    lessThanEqual: function lessThanEqual(_lessThanEqual) {
+	      var key = Object.keys(_lessThanEqual)[0];
+	      var value = _lessThanEqual[key];
+	      return function (tags) {
+	        return tags[key] <= value;
+	      };
+	    },
+	    positiveRegex: function positiveRegex(_positiveRegex) {
+	      var tagKey = Object.keys(_positiveRegex)[0];
 
-	        var insertions = {};
+	      var expression = _positiveRegex[tagKey].join('|');
 
-	        if (changed.deletion) {
-	            diff.deleted().forEach(function(entity) {
-	                removeEntity(entity);
-	            });
-	        }
+	      var regex = new RegExp(expression);
+	      return function (tags) {
+	        return regex.test(tags[tagKey]);
+	      };
+	    },
+	    negativeRegex: function negativeRegex(_negativeRegex) {
+	      var tagKey = Object.keys(_negativeRegex)[0];
 
-	        if (changed.geometry) {
-	            diff.modified().forEach(function(entity) {
-	                removeEntity(entity);
-	                insertions[entity.id] = entity;
-	                updateParents(entity, insertions, {});
-	            });
-	        }
+	      var expression = _negativeRegex[tagKey].join('|');
 
-	        if (changed.addition) {
-	            diff.created().forEach(function(entity) {
-	                insertions[entity.id] = entity;
-	            });
-	        }
+	      var regex = new RegExp(expression);
+	      return function (tags) {
+	        return !regex.test(tags[tagKey]);
+	      };
+	    }
+	  };
+	};
 
-	        loadEntities(Object.values(insertions));
+	var buildLineKeys = function buildLineKeys() {
+	  return {
+	    highway: {
+	      rest_area: true,
+	      services: true
+	    },
+	    railway: {
+	      roundhouse: true,
+	      station: true,
+	      traverser: true,
+	      turntable: true,
+	      wash: true
 	    }
+	  };
+	};
 
-	    // returns an array of entities with bounding boxes overlapping `extent` for the given `graph`
-	    tree.intersects = function(extent, graph) {
-	        updateToGraph(graph);
-	        return _rtree.search(extent.bbox())
-	            .map(function(bbox) { return graph.entity(bbox.id); });
-	    };
+	var serviceMapRules = {
+	  init: function init() {
+	    this._ruleChecks = buildRuleChecks();
+	    this._validationRules = [];
+	    this._areaKeys = osmAreaKeys;
+	    this._lineKeys = buildLineKeys();
+	  },
+	  // list of rules only relevant to tag checks...
+	  filterRuleChecks: function filterRuleChecks(selector) {
+	    var _ruleChecks = this._ruleChecks;
+	    return Object.keys(selector).reduce(function (rules, key) {
+	      if (['geometry', 'error', 'warning'].indexOf(key) === -1) {
+	        rules.push(_ruleChecks[key](selector[key]));
+	      }
 
-	    // returns an array of segment objects with bounding boxes overlapping `extent` for the given `graph`
-	    tree.waySegments = function(extent, graph) {
-	        updateToGraph(graph);
-	        return _segmentsRTree.search(extent.bbox())
-	            .map(function(bbox) { return bbox.segment; });
+	      return rules;
+	    }, []);
+	  },
+	  // builds tagMap from mapcss-parse selector object...
+	  buildTagMap: function buildTagMap(selector) {
+	    var getRegexValues = function getRegexValues(regexes) {
+	      return regexes.map(function (regex) {
+	        return regex.replace(/\$|\^/g, '');
+	      });
 	    };
 
+	    var tagMap = Object.keys(selector).reduce(function (expectedTags, key) {
+	      var values;
+	      var isRegex = /regex/gi.test(key);
+	      var isEqual = /equals/gi.test(key);
 
-	    return tree;
-	}
-
-	function uiModal(selection, blocking) {
-	  var this$1 = this;
-
-	  var keybinding = utilKeybinding('modal');
-	  var previous = selection.select('div.modal');
-	  var animate = previous.empty();
+	      if (isRegex || isEqual) {
+	        Object.keys(selector[key]).forEach(function (selectorKey) {
+	          values = isEqual ? [selector[key][selectorKey]] : getRegexValues(selector[key][selectorKey]);
 
-	  previous.transition()
-	    .duration(200)
-	    .style('opacity', 0)
-	    .remove();
+	          if (expectedTags.hasOwnProperty(selectorKey)) {
+	            values = values.concat(expectedTags[selectorKey]);
+	          }
 
-	  var shaded = selection
-	    .append('div')
-	    .attr('class', 'shaded')
-	    .style('opacity', 0);
+	          expectedTags[selectorKey] = values;
+	        });
+	      } else if (/(greater|less)Than(Equal)?|presence/g.test(key)) {
+	        var tagKey = /presence/.test(key) ? selector[key] : Object.keys(selector[key])[0];
+	        values = [selector[key][tagKey]];
 
-	  shaded.close = function () {
-	    shaded
-	      .transition()
-	      .duration(200)
-	      .style('opacity',0)
-	      .remove();
+	        if (expectedTags.hasOwnProperty(tagKey)) {
+	          values = values.concat(expectedTags[tagKey]);
+	        }
 
-	    modal
-	      .transition()
-	      .duration(200)
-	      .style('top','0px');
+	        expectedTags[tagKey] = values;
+	      }
 
-	    select(document)
-	      .call(keybinding.unbind);
-	  };
+	      return expectedTags;
+	    }, {});
+	    return tagMap;
+	  },
+	  // inspired by osmWay#isArea()
+	  inferGeometry: function inferGeometry(tagMap) {
+	    var _lineKeys = this._lineKeys;
+	    var _areaKeys = this._areaKeys;
 
+	    var keyValueDoesNotImplyArea = function keyValueDoesNotImplyArea(key) {
+	      return utilArrayIntersection(tagMap[key], Object.keys(_areaKeys[key])).length > 0;
+	    };
 
-	  var modal = shaded
-	    .append('div')
-	    .attr('class', 'modal fillL');
+	    var keyValueImpliesLine = function keyValueImpliesLine(key) {
+	      return utilArrayIntersection(tagMap[key], Object.keys(_lineKeys[key])).length > 0;
+	    };
 
-	  if (!blocking) {
-	    shaded.on('click.remove-modal', function () {
-	      if (event.target === this$1) {
-	        shaded.close();
+	    if (tagMap.hasOwnProperty('area')) {
+	      if (tagMap.area.indexOf('yes') > -1) {
+	        return 'area';
 	      }
-	    });
 
-	    modal
-	      .append('button')
-	      .attr('class', 'close')
-	      .on('click', shaded.close)
-	      .call(svgIcon('#iD-icon-close'));
+	      if (tagMap.area.indexOf('no') > -1) {
+	        return 'line';
+	      }
+	    }
 
-	    keybinding
-	      .on('⌫', shaded.close)
-	      .on('⎋', shaded.close);
+	    for (var key in tagMap) {
+	      if (key in _areaKeys && !keyValueDoesNotImplyArea(key)) {
+	        return 'area';
+	      }
 
-	    select(document)
-	      .call(keybinding);
-	  }
+	      if (key in _lineKeys && keyValueImpliesLine(key)) {
+	        return 'area';
+	      }
+	    }
 
-	  modal
-	    .append('div')
-	    .attr('class', 'content');
+	    return 'line';
+	  },
+	  // adds from mapcss-parse selector check...
+	  addRule: function addRule(selector) {
+	    var rule = {
+	      // checks relevant to mapcss-selector
+	      checks: this.filterRuleChecks(selector),
+	      // true if all conditions for a tag error are true..
+	      matches: function matches(entity) {
+	        return this.checks.every(function (check) {
+	          return check(entity.tags);
+	        });
+	      },
+	      // borrowed from Way#isArea()
+	      inferredGeometry: this.inferGeometry(this.buildTagMap(selector), this._areaKeys),
+	      geometryMatches: function geometryMatches(entity, graph) {
+	        if (entity.type === 'node' || entity.type === 'relation') {
+	          return selector.geometry === entity.type;
+	        } else if (entity.type === 'way') {
+	          return this.inferredGeometry === entity.geometry(graph);
+	        }
+	      },
+	      // when geometries match and tag matches are present, return a warning...
+	      findIssues: function findIssues(entity, graph, issues) {
+	        if (this.geometryMatches(entity, graph) && this.matches(entity)) {
+	          var severity = Object.keys(selector).indexOf('error') > -1 ? 'error' : 'warning';
+	          var _message = selector[severity];
+	          issues.push(new validationIssue({
+	            type: 'maprules',
+	            severity: severity,
+	            message: function message() {
+	              return _message;
+	            },
+	            entityIds: [entity.id]
+	          }));
+	        }
+	      }
+	    };
 
-	  if (animate) {
-	    shaded.transition().style('opacity', 1);
-	  } else {
-	    shaded.style('opacity', 1);
+	    this._validationRules.push(rule);
+	  },
+	  clearRules: function clearRules() {
+	    this._validationRules = [];
+	  },
+	  // returns validationRules...
+	  validationRules: function validationRules() {
+	    return this._validationRules;
+	  },
+	  // returns ruleChecks
+	  ruleChecks: function ruleChecks() {
+	    return this._ruleChecks;
 	  }
+	};
 
-	  return shaded;
-	}
-
-	function uiLoading(context) {
-	  var _modalSelection = select(null);
-	  var _message = '';
-	  var _blocking = false;
-
-
-	  var loading = function (selection) {
-	    _modalSelection = uiModal(selection, _blocking);
-
-	    var loadertext = _modalSelection.select('.content')
-	      .classed('loading-modal', true)
-	      .append('div')
-	      .attr('class', 'modal-section fillL');
-
-	    loadertext
-	      .append('img')
-	      .attr('class', 'loader')
-	      .attr('src', context.imagePath('loader-white.gif'));
-
-	    loadertext
-	      .append('h3')
-	      .text(_message);
+	var apibase$2 = 'https://nominatim.openstreetmap.org/';
+	var _inflight$2 = {};
 
-	    _modalSelection.select('button.close')
-	      .attr('class', 'hide');
+	var _nominatimCache;
 
-	    return loading;
-	  };
+	var serviceNominatim = {
+	  init: function init() {
+	    _inflight$2 = {};
+	    _nominatimCache = new RBush();
+	  },
+	  reset: function reset() {
+	    Object.values(_inflight$2).forEach(function (controller) {
+	      controller.abort();
+	    });
+	    _inflight$2 = {};
+	    _nominatimCache = new RBush();
+	  },
+	  countryCode: function countryCode(location, callback) {
+	    this.reverse(location, function (err, result) {
+	      if (err) {
+	        return callback(err);
+	      } else if (result.address) {
+	        return callback(null, result.address.country_code);
+	      } else {
+	        return callback('Unable to geocode', null);
+	      }
+	    });
+	  },
+	  reverse: function reverse(loc, callback) {
+	    var cached = _nominatimCache.search({
+	      minX: loc[0],
+	      minY: loc[1],
+	      maxX: loc[0],
+	      maxY: loc[1]
+	    });
 
+	    if (cached.length > 0) {
+	      if (callback) callback(null, cached[0].data);
+	      return;
+	    }
 
-	  loading.message = function(val) {
-	    if (!arguments.length) { return _message; }
-	    _message = val;
-	    return loading;
-	  };
+	    var params = {
+	      zoom: 13,
+	      format: 'json',
+	      addressdetails: 1,
+	      lat: loc[1],
+	      lon: loc[0]
+	    };
+	    var url = apibase$2 + 'reverse?' + utilQsString(params);
+	    if (_inflight$2[url]) return;
+	    var controller = new AbortController();
+	    _inflight$2[url] = controller;
+	    d3_json(url, {
+	      signal: controller.signal
+	    }).then(function (result) {
+	      delete _inflight$2[url];
 
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      }
 
-	  loading.blocking = function(val) {
-	    if (!arguments.length) { return _blocking; }
-	    _blocking = val;
-	    return loading;
-	  };
+	      var extent = geoExtent(loc).padByMeters(200);
 
+	      _nominatimCache.insert(Object.assign(extent.bbox(), {
+	        data: result
+	      }));
 
-	  loading.close = function () {
-	    _modalSelection.remove();
-	  };
+	      if (callback) callback(null, result);
+	    })["catch"](function (err) {
+	      delete _inflight$2[url];
+	      if (err.name === 'AbortError') return;
+	      if (callback) callback(err.message);
+	    });
+	  },
+	  search: function search(val, callback) {
+	    var searchVal = encodeURIComponent(val);
+	    var url = apibase$2 + 'search/' + searchVal + '?limit=10&format=json';
+	    if (_inflight$2[url]) return;
+	    var controller = new AbortController();
+	    _inflight$2[url] = controller;
+	    d3_json(url, {
+	      signal: controller.signal
+	    }).then(function (result) {
+	      delete _inflight$2[url];
 
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      }
 
-	  loading.isShown = function () {
-	    return _modalSelection && !_modalSelection.empty() && _modalSelection.node().parentNode;
-	  };
+	      if (callback) callback(null, result);
+	    })["catch"](function (err) {
+	      delete _inflight$2[url];
+	      if (err.name === 'AbortError') return;
+	      if (callback) callback(err.message);
+	    });
+	  }
+	};
 
+	// for punction see https://stackoverflow.com/a/21224179
 
-	  return loading;
+	function simplify$1(str) {
+	  if (typeof str !== 'string') return '';
+	  return diacritics.remove(str.replace(/&/g, 'and').replace(/İ/ig, 'i') // for BİM, İşbank - #5017
+	  .replace(/[\s\-=_!"#%'*{},.\/:;?\(\)\[\]@\\$\^*+<>«»~`’\u00a1\u00a7\u00b6\u00b7\u00bf\u037e\u0387\u055a-\u055f\u0589\u05c0\u05c3\u05c6\u05f3\u05f4\u0609\u060a\u060c\u060d\u061b\u061e\u061f\u066a-\u066d\u06d4\u0700-\u070d\u07f7-\u07f9\u0830-\u083e\u085e\u0964\u0965\u0970\u0af0\u0df4\u0e4f\u0e5a\u0e5b\u0f04-\u0f12\u0f14\u0f85\u0fd0-\u0fd4\u0fd9\u0fda\u104a-\u104f\u10fb\u1360-\u1368\u166d\u166e\u16eb-\u16ed\u1735\u1736\u17d4-\u17d6\u17d8-\u17da\u1800-\u1805\u1807-\u180a\u1944\u1945\u1a1e\u1a1f\u1aa0-\u1aa6\u1aa8-\u1aad\u1b5a-\u1b60\u1bfc-\u1bff\u1c3b-\u1c3f\u1c7e\u1c7f\u1cc0-\u1cc7\u1cd3\u2000-\u206f\u2cf9-\u2cfc\u2cfe\u2cff\u2d70\u2e00-\u2e7f\u3001-\u3003\u303d\u30fb\ua4fe\ua4ff\ua60d-\ua60f\ua673\ua67e\ua6f2-\ua6f7\ua874-\ua877\ua8ce\ua8cf\ua8f8-\ua8fa\ua92e\ua92f\ua95f\ua9c1-\ua9cd\ua9de\ua9df\uaa5c-\uaa5f\uaade\uaadf\uaaf0\uaaf1\uabeb\ufe10-\ufe16\ufe19\ufe30\ufe45\ufe46\ufe49-\ufe4c\ufe50-\ufe52\ufe54-\ufe57\ufe5f-\ufe61\ufe68\ufe6a\ufe6b\ufeff\uff01-\uff03\uff05-\uff07\uff0a\uff0c\uff0e\uff0f\uff1a\uff1b\uff1f\uff20\uff3c\uff61\uff64\uff65]+/g, '').toLowerCase());
 	}
 
-	function coreHistory(context) {
-	    var dispatch$1 = dispatch('change', 'merge', 'restore', 'undone', 'redone');
-	    var lock = utilSessionMutex('lock');
-
-	    // restorable if iD not open in another window/tab and a saved history exists in localStorage
-	    var _hasUnresolvedRestorableChanges = lock.lock() && !!corePreferences(getKey('saved_history'));
+	var matchGroups$1 = {adult_gaming_centre:["amenity/casino","amenity/gambling","leisure/adult_gaming_centre"],beauty:["shop/beauty","shop/hairdresser_supply"],bed:["shop/bed","shop/furniture"],beverages:["shop/alcohol","shop/beer","shop/beverages","shop/wine"],camping:["leisure/park","tourism/camp_site","tourism/caravan_site"],car_parts:["shop/car_parts","shop/car_repair","shop/tires","shop/tyres"],clinic:["amenity/clinic","amenity/doctors","healthcare/clinic","healthcare/dialysis"],confectionery:["shop/candy","shop/chocolate","shop/confectionery"],convenience:["shop/beauty","shop/chemist","shop/convenience","shop/cosmetics","shop/grocery","shop/newsagent"],coworking:["amenity/coworking_space","office/coworking","office/coworking_space"],dentist:["amenity/dentist","amenity/doctors","healthcare/dentist"],electronics:["office/telecommunication","shop/computer","shop/electronics","shop/hifi","shop/mobile","shop/mobile_phone","shop/telecommunication"],fabric:["shop/fabric","shop/haberdashery","shop/sewing"],fashion:["shop/accessories","shop/bag","shop/botique","shop/clothes","shop/department_store","shop/fashion","shop/fashion_accessories","shop/sports","shop/shoes"],financial:["amenity/bank","office/accountant","office/financial","office/financial_advisor","office/tax_advisor","shop/tax"],fitness:["leisure/fitness_centre","leisure/fitness_center","leisure/sports_centre","leisure/sports_center"],food:["amenity/pub","amenity/bar","amenity/cafe","amenity/fast_food","amenity/ice_cream","amenity/restaurant","shop/bakery","shop/ice_cream","shop/pastry","shop/tea","shop/coffee"],fuel:["amenity/fuel","shop/gas","shop/convenience;gas","shop/gas;convenience"],gift:["shop/gift","shop/card","shop/cards","shop/stationery"],hardware:["shop/bathroom_furnishing","shop/carpet","shop/diy","shop/doityourself","shop/doors","shop/electrical","shop/flooring","shop/hardware","shop/hardware_store","shop/power_tools","shop/tool_hire","shop/tools","shop/trade"],health_food:["shop/health","shop/health_food","shop/herbalist","shop/nutrition_supplements"],hobby:["shop/electronics","shop/hobby","shop/books","shop/games","shop/collector","shop/toys","shop/model","shop/video_games","shop/anime"],hospital:["amenity/doctors","amenity/hospital","healthcare/hospital"],houseware:["shop/houseware","shop/interior_decoration"],lifeboat_station:["amenity/lifeboat_station","emergency/lifeboat_station","emergency/marine_rescue"],lodging:["tourism/hotel","tourism/motel"],money_transfer:["amenity/money_transfer","shop/money_transfer"],office_supplies:["shop/office_supplies","shop/stationary","shop/stationery"],outdoor:["shop/outdoor","shop/sports"],pharmacy:["amenity/doctors","amenity/pharmacy","healthcare/pharmacy"],playground:["amenity/theme_park","leisure/amusement_arcade","leisure/playground"],rental:["amenity/bicycle_rental","amenity/boat_rental","amenity/car_rental","amenity/truck_rental","amenity/vehicle_rental","shop/rental"],school:["amenity/childcare","amenity/college","amenity/kindergarten","amenity/language_school","amenity/prep_school","amenity/school","amenity/university"],supermarket:["shop/food","shop/frozen_food","shop/greengrocer","shop/grocery","shop/supermarket","shop/wholesale"],variety_store:["shop/variety_store","shop/discount","shop/convenience"],vending:["amenity/vending_machine","shop/vending_machine"],storage:["shop/storage_units","shop/storage_rental"],weight_loss:["amenity/doctors","amenity/weight_clinic","healthcare/counselling","leisure/fitness_centre","office/therapist","shop/beauty","shop/diet","shop/food","shop/health_food","shop/herbalist","shop/nutrition","shop/nutrition_supplements","shop/weight_loss"],wholesale:["shop/wholesale","shop/supermarket","shop/department_store"]};
+	var matchGroupsJSON = {
+	matchGroups: matchGroups$1
+	};
 
-	    var duration = 150;
-	    var _imageryUsed = [];
-	    var _photoOverlaysUsed = [];
-	    var _checkpoints = {};
-	    var _pausedGraph;
-	    var _stack;
-	    var _index;
-	    var _tree;
+	var genericWords = ["^(barn|bazaa?r|bench|bou?tique|building|casa|church)$","^(baseball|basketball|football|soccer|softball|tennis(halle)?)\\s?(field|court)?$","^(club|green|out|ware)\\s?house$","^(driveway|el árbol|fountain|golf|government|graveyard)$","^(hofladen|librairie|magazine?|maison)$","^(mobile home|skate)?\\s?park$","^(n\\s?\\/?\\s?a|name|no\\s?name|none|null|temporary|test|unknown)$","^(obuwie|pond|pool|sale|shops?|sklep|stores?)$","^\\?+$","^tattoo( studio)?$","^windmill$","^церковная( лавка)?$"];
+	var genericWordsJSON = {
+	genericWords: genericWords
+	};
 
+	var trees$1 = {brands:{emoji:"🍔",mainTag:"brand:wikidata",sourceTags:["brand","name"],nameTags:{primary:"^(name|name:\\w+)$",alternate:"^(brand|brand:\\w+|operator|operator:\\w+|\\w+_name|\\w+_name:\\w+)$"}},flags:{emoji:"🚩",mainTag:"flag:wikidata",nameTags:{primary:"^(flag:name|flag:name:\\w+)$",alternate:"^(country|country:\\w+|flag|flag:\\w+|subject|subject:\\w+)$"}},operators:{emoji:"💼",mainTag:"operator:wikidata",sourceTags:["operator"],nameTags:{primary:"^(name|name:\\w+|operator|operator:\\w+)$",alternate:"^(brand|brand:\\w+|\\w+_name|\\w+_name:\\w+)$"}},transit:{emoji:"🚇",mainTag:"network:wikidata",sourceTags:["network"],nameTags:{primary:"^network$",alternate:"^(operator|operator:\\w+|network:\\w+|\\w+_name|\\w+_name:\\w+)$"}}};
+	var treesJSON = {
+	trees: trees$1
+	};
 
-	    // internal _act, accepts list of actions and eased time
-	    function _act(actions, t) {
-	        actions = Array.prototype.slice.call(actions);
+	var matchGroups = matchGroupsJSON.matchGroups;
+	var trees = treesJSON.trees;
+	var Matcher = /*#__PURE__*/function () {
+	  //
+	  // `constructor`
+	  // initialize the genericWords regexes
+	  function Matcher() {
+	    var _this = this;
 
-	        var annotation;
-	        if (typeof actions[actions.length - 1] !== 'function') {
-	            annotation = actions.pop();
-	        }
+	    _classCallCheck$1(this, Matcher);
 
-	        var graph = _stack[_index].graph;
-	        for (var i = 0; i < actions.length; i++) {
-	            graph = actions[i](graph, t);
-	        }
+	    // The `matchIndex` is a specialized structure that allows us to quickly answer
+	    //   _"Given a [key/value tagpair, name, location], what canonical items (brands etc) can match it?"_
+	    //
+	    // The index contains all valid combinations of k/v tagpairs and names
+	    // matchIndex:
+	    // {
+	    //   'k/v': {
+	    //     'primary':         Map (String 'nsimple' -> Set (itemIDs…),   // matches for tags like `name`, `name:xx`, etc.
+	    //     'alternate':       Map (String 'nsimple' -> Set (itemIDs…),   // matches for tags like `alt_name`, `brand`, etc.
+	    //     'excludeNamed':    Map (String 'pattern' -> RegExp),
+	    //     'excludeGeneric':  Map (String 'pattern' -> RegExp)
+	    //   },
+	    // }
+	    //
+	    // {
+	    //   'amenity/bank': {
+	    //     'primary': {
+	    //       'firstbank':              Set ("firstbank-978cca", "firstbank-9794e6", "firstbank-f17495", …),
+	    //       …
+	    //     },
+	    //     'alternate': {
+	    //       '1stbank':                Set ("firstbank-f17495"),
+	    //       …
+	    //     }
+	    //   },
+	    //   'shop/supermarket': {
+	    //     'primary': {
+	    //       'coop':                   Set ("coop-76454b", "coop-ebf2d9", "coop-36e991", …),
+	    //       'coopfood':               Set ("coopfood-a8278b", …),
+	    //       …
+	    //     },
+	    //     'alternate': {
+	    //       'coop':                   Set ("coopfood-a8278b", …),
+	    //       'federatedcooperatives':  Set ("coop-76454b", …),
+	    //       'thecooperative':         Set ("coopfood-a8278b", …),
+	    //       …
+	    //     }
+	    //   }
+	    // }
+	    //
+	    this.matchIndex = undefined; // The `genericWords` structure matches the contents of genericWords.json to instantiated RegExp objects
+	    // Map (String 'pattern' -> RegExp),
 
-	        return {
-	            graph: graph,
-	            annotation: annotation,
-	            imageryUsed: _imageryUsed,
-	            photoOverlaysUsed: _photoOverlaysUsed,
-	            transform: context.projection.transform(),
-	            selectedIDs: context.selectedIDs()
-	        };
-	    }
+	    this.genericWords = new Map();
+	    (genericWordsJSON.genericWords || []).forEach(function (s) {
+	      return _this.genericWords.set(s, new RegExp(s, 'i'));
+	    }); // The `itemLocation` structure maps itemIDs to locationSetIDs:
+	    // {
+	    //   'firstbank-f17495':  '+[first_bank_western_us.geojson]',
+	    //   'firstbank-978cca':  '+[first_bank_carolinas.geojson]',
+	    //   'coop-76454b':       '+[Q16]',
+	    //   'coopfood-a8278b':   '+[Q23666]',
+	    //   …
+	    // }
 
+	    this.itemLocation = undefined; // The `locationSets` structure maps locationSetIDs to *resolved* locationSets:
+	    // {
+	    //   '+[first_bank_western_us.geojson]':  GeoJSON {…},
+	    //   '+[first_bank_carolinas.geojson]':   GeoJSON {…},
+	    //   '+[Q16]':                            GeoJSON {…},
+	    //   '+[Q23666]':                         GeoJSON {…},
+	    //   …
+	    // }
 
-	    // internal _perform with eased time
-	    function _perform(args, t) {
-	        var previous = _stack[_index].graph;
-	        _stack = _stack.slice(0, _index + 1);
-	        var actionResult = _act(args, t);
-	        _stack.push(actionResult);
-	        _index++;
-	        return change(previous);
-	    }
+	    this.locationSets = undefined; // The `locationIndex` is an instance of which-polygon spatial index for the locationSets.
 
+	    this.locationIndex = undefined; // Array of match conflict pairs (currently unused)
 
-	    // internal _replace with eased time
-	    function _replace(args, t) {
-	        var previous = _stack[_index].graph;
-	        // assert(_index == _stack.length - 1)
-	        var actionResult = _act(args, t);
-	        _stack[_index] = actionResult;
-	        return change(previous);
-	    }
+	    this.warnings = [];
+	  } //
+	  // `buildMatchIndex()`
+	  // Call this to prepare the matcher for use
+	  //
+	  // `data` needs to be an Object indexed on a 'tree/key/value' path.
+	  // (e.g. cache filled by `fileTree.read` or data found in `dist/nsi.json`)
+	  // {
+	  //    'brands/amenity/bank': { properties: {}, items: [ {}, {}, … ] },
+	  //    'brands/amenity/bar':  { properties: {}, items: [ {}, {}, … ] },
+	  //    …
+	  // }
+	  //
 
 
-	    // internal _overwrite with eased time
-	    function _overwrite(args, t) {
-	        var previous = _stack[_index].graph;
-	        if (_index > 0) {
-	            _index--;
-	            _stack.pop();
-	        }
-	        _stack = _stack.slice(0, _index + 1);
-	        var actionResult = _act(args, t);
-	        _stack.push(actionResult);
-	        _index++;
-	        return change(previous);
-	    }
+	  _createClass$1(Matcher, [{
+	    key: "buildMatchIndex",
+	    value: function buildMatchIndex(data) {
+	      var that = this;
+	      if (that.matchIndex) return; // it was built already
+
+	      that.matchIndex = new Map();
+	      Object.keys(data).forEach(function (tkv) {
+	        var category = data[tkv];
+	        var parts = tkv.split('/', 3); // tkv = "tree/key/value"
+
+	        var t = parts[0];
+	        var k = parts[1];
+	        var v = parts[2];
+	        var thiskv = "".concat(k, "/").concat(v);
+	        var tree = trees[t];
+	        var branch = that.matchIndex.get(thiskv);
+
+	        if (!branch) {
+	          branch = {
+	            primary: new Map(),
+	            alternate: new Map(),
+	            excludeGeneric: new Map(),
+	            excludeNamed: new Map()
+	          };
+	          that.matchIndex.set(thiskv, branch);
+	        } // ADD EXCLUSIONS
 
 
-	    // determine difference and dispatch a change event
-	    function change(previous) {
-	        var difference = coreDifference(previous, history.graph());
-	        if (!_pausedGraph) {
-	            dispatch$1.call('change', this, difference);
-	        }
-	        return difference;
-	    }
+	        var properties = category.properties || {};
+	        var exclude = properties.exclude || {};
+	        (exclude.generic || []).forEach(function (s) {
+	          return branch.excludeGeneric.set(s, new RegExp(s, 'i'));
+	        });
+	        (exclude.named || []).forEach(function (s) {
+	          return branch.excludeNamed.set(s, new RegExp(s, 'i'));
+	        });
+	        var excludeRegexes = [].concat(_toConsumableArray(branch.excludeGeneric.values()), _toConsumableArray(branch.excludeNamed.values())); // ADD ITEMS
 
+	        var items = category.items;
+	        if (!Array.isArray(items) || !items.length) return; // Primary name patterns, match tags to take first
+	        //  e.g. `name`, `name:ru`
 
-	    // iD uses namespaced keys so multiple installations do not conflict
-	    function getKey(n) {
-	        return 'iD_' + window.location.origin + '_' + n;
-	    }
+	        var primaryName = new RegExp(tree.nameTags.primary, 'i'); // Alternate name patterns, match tags to consider after primary
+	        //  e.g. `alt_name`, `short_name`, `brand`, `brand:ru`, etc..
 
+	        var alternateName = new RegExp(tree.nameTags.alternate, 'i'); // There are a few exceptions to the name matching regexes.
+	        // Usually a tag suffix contains a language code like `name:en`, `name:ru`
+	        // but we want to exclude things like `operator:type`, `name:etymology`, etc..
 
-	    var history = {
+	        var notName = /:(colou?r|type|forward|backward|left|right|etymology|pronunciation|wikipedia)$/i; // For certain categories we do not want to match generic KV pairs like `building/yes` or `amenity/yes`
 
-	        graph: function() {
-	            return _stack[_index].graph;
-	        },
+	        var skipGenericKV = skipGenericKVMatches(t, k, v); // We will collect the generic KV pairs anyway (for the purpose of filtering them out of matchTags)
 
+	        var genericKV = new Set(["".concat(k, "/yes"), "building/yes"]); // Collect alternate tagpairs for this kv category from matchGroups.
+	        // We might also pick up a few more generic KVs (like `shop/yes`)
 
-	        tree: function() {
-	            return _tree;
-	        },
+	        var matchGroupKV = new Set();
+	        Object.values(matchGroups).forEach(function (matchGroup) {
+	          var inGroup = matchGroup.some(function (otherkv) {
+	            return otherkv === thiskv;
+	          });
+	          if (!inGroup) return;
+	          matchGroup.forEach(function (otherkv) {
+	            if (otherkv === thiskv) return; // skip self
 
+	            matchGroupKV.add(otherkv);
+	            var otherk = otherkv.split('/', 2)[0]; // we might pick up a `shop/yes`
 
-	        base: function() {
-	            return _stack[0].graph;
-	        },
+	            genericKV.add("".concat(otherk, "/yes"));
+	          });
+	        }); // For each item, insert all [key, value, name] combinations into the match index
 
+	        items.forEach(function (item) {
+	          if (!item.id) return; // Automatically remove redundant `matchTags` - #3417
+	          // (i.e. This kv is already covered by matchGroups, so it doesn't need to be in `item.matchTags`)
 
-	        merge: function(entities/*, extent*/) {
-	            var stack = _stack.map(function(state) { return state.graph; });
-	            _stack[0].graph.rebase(entities, stack, false);
-	            _tree.rebase(entities, false);
+	          if (Array.isArray(item.matchTags) && item.matchTags.length) {
+	            item.matchTags = item.matchTags.filter(function (matchTag) {
+	              return !matchGroupKV.has(matchTag) && !genericKV.has(matchTag);
+	            });
+	            if (!item.matchTags.length) delete item.matchTags;
+	          } // key/value tagpairs to insert into the match index..
 
-	            dispatch$1.call('merge', this, entities);
-	        },
 
+	          var kvTags = ["".concat(thiskv)].concat(item.matchTags || []);
 
-	        perform: function() {
-	            // complete any transition already in progress
-	            select(document).interrupt('history.perform');
+	          if (!skipGenericKV) {
+	            kvTags = kvTags.concat(Array.from(genericKV)); // #3454 - match some generic tags
+	          } // Index all the namelike tag values
 
-	            var transitionable = false;
-	            var action0 = arguments[0];
 
-	            if (arguments.length === 1 ||
-	                (arguments.length === 2 && (typeof arguments[1] !== 'function'))) {
-	                transitionable = !!action0.transitionable;
-	            }
+	          Object.keys(item.tags).forEach(function (osmkey) {
+	            if (notName.test(osmkey)) return; // osmkey is not a namelike tag, skip
 
-	            if (transitionable) {
-	                var origArguments = arguments;
-	                select(document)
-	                    .transition('history.perform')
-	                    .duration(duration)
-	                    .ease(linear$1)
-	                    .tween('history.tween', function() {
-	                        return function(t) {
-	                            if (t < 1) { _overwrite([action0], t); }
-	                        };
-	                    })
-	                    .on('start', function() {
-	                        _perform([action0], 0);
-	                    })
-	                    .on('end interrupt', function() {
-	                        _overwrite(origArguments, 1);
-	                    });
+	            var osmvalue = item.tags[osmkey];
+	            if (!osmvalue || excludeRegexes.some(function (regex) {
+	              return regex.test(osmvalue);
+	            })) return; // osmvalue missing or excluded
 
-	            } else {
-	                return _perform(arguments);
+	            if (primaryName.test(osmkey)) {
+	              kvTags.forEach(function (kv) {
+	                return insertName('primary', kv, simplify$1(osmvalue), item.id);
+	              });
+	            } else if (alternateName.test(osmkey)) {
+	              kvTags.forEach(function (kv) {
+	                return insertName('alternate', kv, simplify$1(osmvalue), item.id);
+	              });
 	            }
-	        },
-
-
-	        replace: function() {
-	            select(document).interrupt('history.perform');
-	            return _replace(arguments, 1);
-	        },
+	          }); // Index `matchNames` after indexing all other names..
+
+	          var keepMatchNames = new Set();
+	          (item.matchNames || []).forEach(function (matchName) {
+	            // If this matchname isn't already indexed, add it to the alternate index
+	            var nsimple = simplify$1(matchName);
+	            kvTags.forEach(function (kv) {
+	              var branch = that.matchIndex.get(kv);
+	              var primaryLeaf = branch && branch.primary.get(nsimple);
+	              var alternateLeaf = branch && branch.alternate.get(nsimple);
+	              var inPrimary = primaryLeaf && primaryLeaf.has(item.id);
+	              var inAlternate = alternateLeaf && alternateLeaf.has(item.id);
+
+	              if (!inPrimary && !inAlternate) {
+	                insertName('alternate', kv, nsimple, item.id);
+	                keepMatchNames.add(matchName);
+	              }
+	            });
+	          }); // Automatically remove redundant `matchNames` - #3417
+	          // (i.e. This name got indexed some other way, so it doesn't need to be in `item.matchNames`)
 
+	          if (keepMatchNames.size) {
+	            item.matchNames = Array.from(keepMatchNames);
+	          } else {
+	            delete item.matchNames;
+	          }
+	        }); // each item
+	      }); // each tkv
+	      // Insert this item into the matchIndex
+
+	      function insertName(which, kv, nsimple, itemID) {
+	        if (!nsimple) return;
+	        var branch = that.matchIndex.get(kv);
+
+	        if (!branch) {
+	          branch = {
+	            primary: new Map(),
+	            alternate: new Map(),
+	            excludeGeneric: new Map(),
+	            excludeNamed: new Map()
+	          };
+	          that.matchIndex.set(kv, branch);
+	        }
 
-	        // Same as calling pop and then perform
-	        overwrite: function() {
-	            select(document).interrupt('history.perform');
-	            return _overwrite(arguments, 1);
-	        },
+	        var leaf = branch[which].get(nsimple);
 
+	        if (!leaf) {
+	          leaf = new Set();
+	          branch[which].set(nsimple, leaf);
+	        }
 
-	        pop: function(n) {
-	            select(document).interrupt('history.perform');
+	        leaf.add(itemID); // insert
+	      } // For certain categories we do not want to match generic KV pairs like `building/yes` or `amenity/yes`
 
-	            var previous = _stack[_index].graph;
-	            if (isNaN(+n) || +n < 0) {
-	                n = 1;
-	            }
-	            while (n-- > 0 && _index > 0) {
-	                _index--;
-	                _stack.pop();
-	            }
-	            return change(previous);
-	        },
 
+	      function skipGenericKVMatches(t, k, v) {
+	        return t === 'flags' || t === 'transit' || k === 'landuse' || v === 'atm' || v === 'bicycle_parking' || v === 'car_sharing' || v === 'caravan_site' || v === 'charging_station' || v === 'dog_park' || v === 'parking' || v === 'phone' || v === 'playground' || v === 'post_box' || v === 'public_bookcase' || v === 'recycling' || v === 'vending_machine';
+	      }
+	    } //
+	    // `buildLocationIndex()`
+	    // Call this to prepare a which-polygon location index.
+	    // This *resolves* all the locationSets into GeoJSON, which takes some time.
+	    // You can skip this step if you don't care about matching within a location.
+	    //
+	    // `data` needs to be an Object indexed on a 'tree/key/value' path.
+	    // (e.g. cache filled by `fileTree.read` or data found in `dist/nsi.json`)
+	    // {
+	    //    'brands/amenity/bank': { properties: {}, items: [ {}, {}, … ] },
+	    //    'brands/amenity/bar':  { properties: {}, items: [ {}, {}, … ] },
+	    //    …
+	    // }
+	    //
 
-	        // Back to the previous annotated state or _index = 0.
-	        undo: function() {
-	            select(document).interrupt('history.perform');
+	  }, {
+	    key: "buildLocationIndex",
+	    value: function buildLocationIndex(data, loco) {
+	      var that = this;
+	      if (that.locationIndex) return; // it was built already
+
+	      that.itemLocation = new Map();
+	      that.locationSets = new Map();
+	      Object.keys(data).forEach(function (tkv) {
+	        var items = data[tkv].items;
+	        if (!Array.isArray(items) || !items.length) return;
+	        items.forEach(function (item) {
+	          if (that.itemLocation.has(item.id)) return; // we've seen item id already - shouldn't be possible?
+
+	          var resolved;
+
+	          try {
+	            resolved = loco.resolveLocationSet(item.locationSet); // resolve a feature for this locationSet
+	          } catch (err) {
+	            console.warn("buildLocationIndex: ".concat(err.message)); // couldn't resolve
+	          }
 
-	            var previousStack = _stack[_index];
-	            var previous = previousStack.graph;
-	            while (_index > 0) {
-	                _index--;
-	                if (_stack[_index].annotation) { break; }
-	            }
+	          if (!resolved || !resolved.id) return;
+	          that.itemLocation.set(item.id, resolved.id); // link it to the item
 
-	            dispatch$1.call('undone', this, _stack[_index], previousStack);
-	            return change(previous);
-	        },
+	          if (that.locationSets.has(resolved.id)) return; // we've seen this locationSet feature before..
+	          // First time seeing this locationSet feature, make a copy and add to locationSet cache..
 
+	          var feature = _cloneDeep(resolved.feature);
 
-	        // Forward to the next annotated state.
-	        redo: function() {
-	            select(document).interrupt('history.perform');
+	          feature.id = resolved.id; // Important: always use the locationSet `id` (`+[Q30]`), not the feature `id` (`Q30`)
 
-	            var previousStack = _stack[_index];
-	            var previous = previousStack.graph;
-	            var tryIndex = _index;
-	            while (tryIndex < _stack.length - 1) {
-	                tryIndex++;
-	                if (_stack[tryIndex].annotation) {
-	                    _index = tryIndex;
-	                    dispatch$1.call('redone', this, _stack[_index], previousStack);
-	                    break;
-	                }
-	            }
+	          feature.properties.id = resolved.id;
 
-	            return change(previous);
-	        },
+	          if (!feature.geometry.coordinates.length || !feature.properties.area) {
+	            console.warn("buildLocationIndex: locationSet ".concat(resolved.id, " for ").concat(item.id, " resolves to an empty feature:"));
+	            console.warn(JSON.stringify(feature));
+	            return;
+	          }
 
+	          that.locationSets.set(resolved.id, feature);
+	        });
+	      });
+	      that.locationIndex = whichPolygon_1({
+	        type: 'FeatureCollection',
+	        features: _toConsumableArray(that.locationSets.values())
+	      });
 
-	        pauseChangeDispatch: function() {
-	            if (!_pausedGraph) {
-	                _pausedGraph = _stack[_index].graph;
-	            }
-	        },
+	      function _cloneDeep(obj) {
+	        return JSON.parse(JSON.stringify(obj));
+	      }
+	    } //
+	    // `match()`
+	    // Pass parts and return an Array of matches.
+	    // `k` - key
+	    // `v` - value
+	    // `n` - namelike
+	    // `loc` - optional - [lon,lat] location to search
+	    //
+	    // 1. If the [k,v,n] tuple matches a canonical item…
+	    // Return an Array of match results.
+	    // Each result will include the area in km² that the item is valid.
+	    //
+	    // Order of results:
+	    // Primary ordering will be on the "match" column:
+	    //   "primary" - where the query matches the `name` tag, followed by
+	    //   "alternate" - where the query matches an alternate name tag (e.g. short_name, brand, operator, etc)
+	    // Secondary ordering will be on the "area" column:
+	    //   "area descending" if no location was provided, (worldwide before local)
+	    //   "area ascending" if location was provided (local before worldwide)
+	    //
+	    // [
+	    //   { match: 'primary',   itemID: String,  area: Number,  kv: String,  nsimple: String },
+	    //   { match: 'primary',   itemID: String,  area: Number,  kv: String,  nsimple: String },
+	    //   { match: 'alternate', itemID: String,  area: Number,  kv: String,  nsimple: String },
+	    //   { match: 'alternate', itemID: String,  area: Number,  kv: String,  nsimple: String },
+	    //   …
+	    // ]
+	    //
+	    // -or-
+	    //
+	    // 2. If the [k,v,n] tuple matches an exclude pattern…
+	    // Return an Array with a single exclude result, either
+	    //
+	    // [ { match: 'excludeGeneric', pattern: String,  kv: String } ]  // "generic" e.g. "Food Court"
+	    //   or
+	    // [ { match: 'excludeNamed', pattern: String,  kv: String } ]    // "named", e.g. "Kebabai"
+	    //
+	    // About results
+	    //   "generic" - a generic word that is probably not really a name.
+	    //     For these, iD should warn the user "Hey don't put 'food court' in the name tag".
+	    //   "named" - a real name like "Kebabai" that is just common, but not a brand.
+	    //     For these, iD should just let it be. We don't include these in NSI, but we don't want to nag users about it either.
+	    //
+	    // -or-
+	    //
+	    // 3. If the [k,v,n] tuple matches nothing of any kind, return `null`
+	    //
+	    //
 
+	  }, {
+	    key: "match",
+	    value: function match(k, v, n, loc) {
+	      var that = this;
 
-	        resumeChangeDispatch: function() {
-	            if (_pausedGraph) {
-	                var previous = _pausedGraph;
-	                _pausedGraph = null;
-	                return change(previous);
-	            }
-	        },
+	      if (!that.matchIndex) {
+	        throw new Error('match:  matchIndex not built.');
+	      } // If we were supplied a location, and a that.locationIndex has been set up,
+	      // get the locationSets that are valid there so we can filter results.
 
 
-	        undoAnnotation: function() {
-	            var i = _index;
-	            while (i >= 0) {
-	                if (_stack[i].annotation) { return _stack[i].annotation; }
-	                i--;
-	            }
-	        },
+	      var matchLocations;
 
+	      if (Array.isArray(loc) && that.locationIndex) {
+	        // which-polygon query returns an array of GeoJSON properties, pass true to return all results
+	        matchLocations = that.locationIndex([loc[0], loc[1], loc[0], loc[1]], true);
+	      }
 
-	        redoAnnotation: function() {
-	            var i = _index + 1;
-	            while (i <= _stack.length - 1) {
-	                if (_stack[i].annotation) { return _stack[i].annotation; }
-	                i++;
-	            }
-	        },
+	      var nsimple = simplify$1(n);
+	      var seen = new Set();
+	      var results = [];
+	      gatherResults('primary');
+	      gatherResults('alternate');
+	      if (results.length) return results;
+	      gatherResults('exclude');
+	      return results.length ? results : null;
+
+	      function gatherResults(which) {
+	        // First try an exact match on k/v
+	        var kv = "".concat(k, "/").concat(v);
+	        var didMatch = tryMatch(which, kv);
+	        if (didMatch) return; // If that didn't work, look in match groups for other pairs considered equivalent to k/v..
+
+	        for (var mg in matchGroups) {
+	          var matchGroup = matchGroups[mg];
+	          var inGroup = matchGroup.some(function (otherkv) {
+	            return otherkv === kv;
+	          });
+	          if (!inGroup) continue;
 
+	          for (var i = 0; i < matchGroup.length; i++) {
+	            var otherkv = matchGroup[i];
+	            if (otherkv === kv) continue; // skip self
 
-	        // Returns the entities from the active graph with bounding boxes
-	        // overlapping the given `extent`.
-	        intersects: function(extent) {
-	            return _tree.intersects(extent, _stack[_index].graph);
-	        },
+	            didMatch = tryMatch(which, otherkv);
+	            if (didMatch) return;
+	          }
+	        } // If finished 'exclude' pass and still haven't matched anything, try the global `genericWords.json` patterns
 
 
-	        difference: function() {
-	            var base = _stack[0].graph;
-	            var head = _stack[_index].graph;
-	            return coreDifference(base, head);
-	        },
+	        if (which === 'exclude') {
+	          var regex = _toConsumableArray(that.genericWords.values()).find(function (regex) {
+	            return regex.test(n);
+	          });
 
+	          if (regex) {
+	            results.push({
+	              match: 'excludeGeneric',
+	              pattern: String(regex)
+	            }); // note no `branch`, no `kv`
 
-	        changes: function(action) {
-	            var base = _stack[0].graph;
-	            var head = _stack[_index].graph;
+	            return;
+	          }
+	        }
+	      }
 
-	            if (action) {
-	                head = action(head);
-	            }
+	      function tryMatch(which, kv) {
+	        var branch = that.matchIndex.get(kv);
+	        if (!branch) return;
 
-	            var difference = coreDifference(base, head);
+	        if (which === 'exclude') {
+	          // Test name `n` against named and generic exclude patterns
+	          var regex = _toConsumableArray(branch.excludeNamed.values()).find(function (regex) {
+	            return regex.test(n);
+	          });
 
-	            return {
-	                modified: difference.modified(),
-	                created: difference.created(),
-	                deleted: difference.deleted()
-	            };
-	        },
+	          if (regex) {
+	            results.push({
+	              match: 'excludeNamed',
+	              pattern: String(regex),
+	              kv: kv
+	            });
+	            return;
+	          }
 
+	          regex = _toConsumableArray(branch.excludeGeneric.values()).find(function (regex) {
+	            return regex.test(n);
+	          });
 
-	        hasChanges: function() {
-	            return this.difference().length() > 0;
-	        },
+	          if (regex) {
+	            results.push({
+	              match: 'excludeGeneric',
+	              pattern: String(regex),
+	              kv: kv
+	            });
+	            return;
+	          }
 
+	          return;
+	        }
 
-	        imageryUsed: function(sources) {
-	            if (sources) {
-	                _imageryUsed = sources;
-	                return history;
-	            } else {
-	                var s = new Set();
-	                _stack.slice(1, _index + 1).forEach(function(state) {
-	                    state.imageryUsed.forEach(function(source) {
-	                        if (source !== 'Custom') {
-	                            s.add(source);
-	                        }
-	                    });
-	                });
-	                return Array.from(s);
-	            }
-	        },
+	        var leaf = branch[which].get(nsimple);
+	        if (!leaf || !leaf.size) return; // If we get here, we matched something..
+	        // Prepare the results, calculate areas (if location index was set up)
 
+	        var hits = Array.from(leaf).map(function (itemID) {
+	          var area = Infinity;
 
-	        photoOverlaysUsed: function(sources) {
-	            if (sources) {
-	                _photoOverlaysUsed = sources;
-	                return history;
-	            } else {
-	                var s = new Set();
-	                _stack.slice(1, _index + 1).forEach(function(state) {
-	                    if (state.photoOverlaysUsed && Array.isArray(state.photoOverlaysUsed)) {
-	                        state.photoOverlaysUsed.forEach(function(photoOverlay) {
-	                            s.add(photoOverlay);
-	                        });
-	                    }
-	                });
-	                return Array.from(s);
-	            }
-	        },
+	          if (that.itemLocation && that.locationSets) {
+	            var location = that.locationSets.get(that.itemLocation.get(itemID));
+	            area = location && location.properties.area || Infinity;
+	          }
 
+	          return {
+	            match: which,
+	            itemID: itemID,
+	            area: area,
+	            kv: kv,
+	            nsimple: nsimple
+	          };
+	        });
+	        var sortFn = byAreaDescending; // Filter the match to include only results valid in the requested `loc`..
 
-	        // save the current history state
-	        checkpoint: function(key) {
-	            _checkpoints[key] = {
-	                stack: _stack,
-	                index: _index
-	            };
-	            return history;
-	        },
+	        if (matchLocations) {
+	          hits = hits.filter(isValidLocation);
+	          sortFn = byAreaAscending;
+	        }
 
+	        if (!hits.length) return; // push results
 
-	        // restore history state to a given checkpoint or reset completely
-	        reset: function(key) {
-	            if (key !== undefined && _checkpoints.hasOwnProperty(key)) {
-	                _stack = _checkpoints[key].stack;
-	                _index = _checkpoints[key].index;
-	            } else {
-	                _stack = [{graph: coreGraph()}];
-	                _index = 0;
-	                _tree = coreTree(_stack[0].graph);
-	                _checkpoints = {};
-	            }
-	            dispatch$1.call('change');
-	            return history;
-	        },
+	        hits.sort(sortFn).forEach(function (hit) {
+	          if (seen.has(hit.itemID)) return;
+	          seen.add(hit.itemID);
+	          results.push(hit);
+	        });
+	        return true;
 
+	        function isValidLocation(hit) {
+	          if (!that.itemLocation) return true;
+	          return matchLocations.find(function (props) {
+	            return props.id === that.itemLocation.get(hit.itemID);
+	          });
+	        } // Sort smaller (more local) locations first.
 
-	        // `toIntroGraph()` is used to export the intro graph used by the walkthrough.
-	        //
-	        // To use it:
-	        //  1. Start the walkthrough.
-	        //  2. Get to a "free editing" tutorial step
-	        //  3. Make your edits to the walkthrough map
-	        //  4. In your browser dev console run:
-	        //        `id.history().toIntroGraph()`
-	        //  5. This outputs stringified JSON to the browser console
-	        //  6. Copy it to `data/intro_graph.json` and prettify it in your code editor
-	        toIntroGraph: function() {
-	            var nextID = { n: 0, r: 0, w: 0 };
-	            var permIDs = {};
-	            var graph = this.graph();
-	            var baseEntities = {};
-
-	            // clone base entities..
-	            Object.values(graph.base().entities).forEach(function(entity) {
-	                var copy = copyIntroEntity(entity);
-	                baseEntities[copy.id] = copy;
-	            });
 
-	            // replace base entities with head entities..
-	            Object.keys(graph.entities).forEach(function(id) {
-	                var entity = graph.entities[id];
-	                if (entity) {
-	                    var copy = copyIntroEntity(entity);
-	                    baseEntities[copy.id] = copy;
-	                } else {
-	                    delete baseEntities[id];
-	                }
-	            });
+	        function byAreaAscending(hitA, hitB) {
+	          return hitA.area - hitB.area;
+	        } // Sort larger (more worldwide) locations first.
 
-	            // swap temporary for permanent ids..
-	            Object.values(baseEntities).forEach(function(entity) {
-	                if (Array.isArray(entity.nodes)) {
-	                    entity.nodes = entity.nodes.map(function(node) {
-	                        return permIDs[node] || node;
-	                    });
-	                }
-	                if (Array.isArray(entity.members)) {
-	                    entity.members = entity.members.map(function(member) {
-	                        member.id = permIDs[member.id] || member.id;
-	                        return member;
-	                    });
-	                }
-	            });
 
-	            return JSON.stringify({ dataIntroGraph: baseEntities });
+	        function byAreaDescending(hitA, hitB) {
+	          return hitB.area - hitA.area;
+	        }
+	      }
+	    } //
+	    // `getWarnings()`
+	    // Return any warnings discovered when buiding the index.
+	    // (currently this does nothing)
+	    //
 
+	  }, {
+	    key: "getWarnings",
+	    value: function getWarnings() {
+	      return this.warnings;
+	    }
+	  }]);
 
-	            function copyIntroEntity(source) {
-	                var copy = utilObjectOmit(source, ['type', 'user', 'v', 'version', 'visible']);
+	  return Matcher;
+	}();
 
-	                // Note: the copy is no longer an osmEntity, so it might not have `tags`
-	                if (copy.tags && !Object.keys(copy.tags)) {
-	                    delete copy.tags;
-	                }
+	/**
+	 * Checks if `value` is the
+	 * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
+	 * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 0.1.0
+	 * @category Lang
+	 * @param {*} value The value to check.
+	 * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+	 * @example
+	 *
+	 * _.isObject({});
+	 * // => true
+	 *
+	 * _.isObject([1, 2, 3]);
+	 * // => true
+	 *
+	 * _.isObject(_.noop);
+	 * // => true
+	 *
+	 * _.isObject(null);
+	 * // => false
+	 */
+	function isObject$2(value) {
+	  var type = _typeof(value);
 
-	                if (Array.isArray(copy.loc)) {
-	                    copy.loc[0] = +copy.loc[0].toFixed(6);
-	                    copy.loc[1] = +copy.loc[1].toFixed(6);
-	                }
+	  return value != null && (type == 'object' || type == 'function');
+	}
 
-	                var match = source.id.match(/([nrw])-\d*/);  // temporary id
-	                if (match !== null) {
-	                    var nrw = match[1];
-	                    var permID;
-	                    do { permID = nrw + (++nextID[nrw]); }
-	                    while (baseEntities.hasOwnProperty(permID));
+	/** Detect free variable `global` from Node.js. */
+	var freeGlobal = (typeof global === "undefined" ? "undefined" : _typeof(global)) == 'object' && global && global.Object === Object && global;
 
-	                    copy.id = permIDs[source.id] = permID;
-	                }
-	                return copy;
-	            }
-	        },
+	/** Detect free variable `self`. */
 
+	var freeSelf = (typeof self === "undefined" ? "undefined" : _typeof(self)) == 'object' && self && self.Object === Object && self;
+	/** Used as a reference to the global object. */
 
-	        toJSON: function() {
-	            if (!this.hasChanges()) { return; }
+	var root = freeGlobal || freeSelf || Function('return this')();
 
-	            var allEntities = {};
-	            var baseEntities = {};
-	            var base = _stack[0];
+	/**
+	 * Gets the timestamp of the number of milliseconds that have elapsed since
+	 * the Unix epoch (1 January 1970 00:00:00 UTC).
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 2.4.0
+	 * @category Date
+	 * @returns {number} Returns the timestamp.
+	 * @example
+	 *
+	 * _.defer(function(stamp) {
+	 *   console.log(_.now() - stamp);
+	 * }, _.now());
+	 * // => Logs the number of milliseconds it took for the deferred invocation.
+	 */
 
-	            var s = _stack.map(function(i) {
-	                var modified = [];
-	                var deleted = [];
+	var now = function now() {
+	  return root.Date.now();
+	};
 
-	                Object.keys(i.graph.entities).forEach(function(id) {
-	                    var entity = i.graph.entities[id];
-	                    if (entity) {
-	                        var key = osmEntity.key(entity);
-	                        allEntities[key] = entity;
-	                        modified.push(key);
-	                    } else {
-	                        deleted.push(id);
-	                    }
+	/** Used to match a single whitespace character. */
+	var reWhitespace = /\s/;
+	/**
+	 * Used by `_.trim` and `_.trimEnd` to get the index of the last non-whitespace
+	 * character of `string`.
+	 *
+	 * @private
+	 * @param {string} string The string to inspect.
+	 * @returns {number} Returns the index of the last non-whitespace character.
+	 */
 
-	                    // make sure that the originals of changed or deleted entities get merged
-	                    // into the base of the _stack after restoring the data from JSON.
-	                    if (id in base.graph.entities) {
-	                        baseEntities[id] = base.graph.entities[id];
-	                    }
-	                    if (entity && entity.nodes) {
-	                        // get originals of pre-existing child nodes
-	                        entity.nodes.forEach(function(nodeID) {
-	                            if (nodeID in base.graph.entities) {
-	                                baseEntities[nodeID] = base.graph.entities[nodeID];
-	                            }
-	                        });
-	                    }
-	                    // get originals of parent entities too
-	                    var baseParents = base.graph._parentWays[id];
-	                    if (baseParents) {
-	                        baseParents.forEach(function(parentID) {
-	                            if (parentID in base.graph.entities) {
-	                                baseEntities[parentID] = base.graph.entities[parentID];
-	                            }
-	                        });
-	                    }
-	                });
+	function trimmedEndIndex(string) {
+	  var index = string.length;
 
-	                var x = {};
+	  while (index-- && reWhitespace.test(string.charAt(index))) {}
 
-	                if (modified.length) { x.modified = modified; }
-	                if (deleted.length) { x.deleted = deleted; }
-	                if (i.imageryUsed) { x.imageryUsed = i.imageryUsed; }
-	                if (i.photoOverlaysUsed) { x.photoOverlaysUsed = i.photoOverlaysUsed; }
-	                if (i.annotation) { x.annotation = i.annotation; }
-	                if (i.transform) { x.transform = i.transform; }
-	                if (i.selectedIDs) { x.selectedIDs = i.selectedIDs; }
+	  return index;
+	}
 
-	                return x;
-	            });
+	/** Used to match leading whitespace. */
 
-	            return JSON.stringify({
-	                version: 3,
-	                entities: Object.values(allEntities),
-	                baseEntities: Object.values(baseEntities),
-	                stack: s,
-	                nextIDs: osmEntity.id.next,
-	                index: _index,
-	                // note the time the changes were saved
-	                timestamp: (new Date()).getTime()
-	            });
-	        },
+	var reTrimStart = /^\s+/;
+	/**
+	 * The base implementation of `_.trim`.
+	 *
+	 * @private
+	 * @param {string} string The string to trim.
+	 * @returns {string} Returns the trimmed string.
+	 */
 
+	function baseTrim(string) {
+	  return string ? string.slice(0, trimmedEndIndex(string) + 1).replace(reTrimStart, '') : string;
+	}
 
-	        fromJSON: function(json, loadChildNodes) {
-	            var h = JSON.parse(json);
-	            var loadComplete = true;
+	/** Built-in value references. */
 
-	            osmEntity.id.next = h.nextIDs;
-	            _index = h.index;
+	var _Symbol = root.Symbol;
 
-	            if (h.version === 2 || h.version === 3) {
-	                var allEntities = {};
+	/** Used for built-in method references. */
 
-	                h.entities.forEach(function(entity) {
-	                    allEntities[osmEntity.key(entity)] = osmEntity(entity);
-	                });
+	var objectProto$1 = Object.prototype;
+	/** Used to check objects for own properties. */
 
-	                if (h.version === 3) {
-	                    // This merges originals for changed entities into the base of
-	                    // the _stack even if the current _stack doesn't have them (for
-	                    // example when iD has been restarted in a different region)
-	                    var baseEntities = h.baseEntities.map(function(d) { return osmEntity(d); });
-	                    var stack = _stack.map(function(state) { return state.graph; });
-	                    _stack[0].graph.rebase(baseEntities, stack, true);
-	                    _tree.rebase(baseEntities, true);
-
-	                    // When we restore a modified way, we also need to fetch any missing
-	                    // childnodes that would normally have been downloaded with it.. #2142
-	                    if (loadChildNodes) {
-	                        var osm = context.connection();
-	                        var baseWays = baseEntities
-	                            .filter(function(e) { return e.type === 'way'; });
-	                        var nodeIDs = baseWays
-	                            .reduce(function(acc, way) { return utilArrayUnion(acc, way.nodes); }, []);
-	                        var missing = nodeIDs
-	                            .filter(function(n) { return !_stack[0].graph.hasEntity(n); });
-
-	                        if (missing.length && osm) {
-	                            loadComplete = false;
-	                            context.map().redrawEnable(false);
-
-	                            var loading = uiLoading(context).blocking(true);
-	                            context.container().call(loading);
-
-	                            var childNodesLoaded = function(err, result) {
-	                                if (!err) {
-	                                    var visibleGroups = utilArrayGroupBy(result.data, 'visible');
-	                                    var visibles = visibleGroups.true || [];      // alive nodes
-	                                    var invisibles = visibleGroups.false || [];   // deleted nodes
-
-	                                    if (visibles.length) {
-	                                        var visibleIDs = visibles.map(function(entity) { return entity.id; });
-	                                        var stack = _stack.map(function(state) { return state.graph; });
-	                                        missing = utilArrayDifference(missing, visibleIDs);
-	                                        _stack[0].graph.rebase(visibles, stack, true);
-	                                        _tree.rebase(visibles, true);
-	                                    }
-
-	                                    // fetch older versions of nodes that were deleted..
-	                                    invisibles.forEach(function(entity) {
-	                                        osm.loadEntityVersion(entity.id, +entity.version - 1, childNodesLoaded);
-	                                    });
-	                                }
-
-	                                if (err || !missing.length) {
-	                                    loading.close();
-	                                    context.map().redrawEnable(true);
-	                                    dispatch$1.call('change');
-	                                    dispatch$1.call('restore', this);
-	                                }
-	                            };
-
-	                            osm.loadMultiple(missing, childNodesLoaded);
-	                        }
-	                    }
-	                }
+	var hasOwnProperty$2 = objectProto$1.hasOwnProperty;
+	/**
+	 * Used to resolve the
+	 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+	 * of values.
+	 */
 
-	                _stack = h.stack.map(function(d) {
-	                    var entities = {}, entity;
+	var nativeObjectToString$1 = objectProto$1.toString;
+	/** Built-in value references. */
 
-	                    if (d.modified) {
-	                        d.modified.forEach(function(key) {
-	                            entity = allEntities[key];
-	                            entities[entity.id] = entity;
-	                        });
-	                    }
+	var symToStringTag$1 = _Symbol ? _Symbol.toStringTag : undefined;
+	/**
+	 * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
+	 *
+	 * @private
+	 * @param {*} value The value to query.
+	 * @returns {string} Returns the raw `toStringTag`.
+	 */
 
-	                    if (d.deleted) {
-	                        d.deleted.forEach(function(id) {
-	                            entities[id] = undefined;
-	                        });
-	                    }
+	function getRawTag(value) {
+	  var isOwn = hasOwnProperty$2.call(value, symToStringTag$1),
+	      tag = value[symToStringTag$1];
 
-	                    return {
-	                        graph: coreGraph(_stack[0].graph).load(entities),
-	                        annotation: d.annotation,
-	                        imageryUsed: d.imageryUsed,
-	                        photoOverlaysUsed: d.photoOverlaysUsed,
-	                        transform: d.transform,
-	                        selectedIDs: d.selectedIDs
-	                    };
-	                });
+	  try {
+	    value[symToStringTag$1] = undefined;
+	    var unmasked = true;
+	  } catch (e) {}
 
-	            } else { // original version
-	                _stack = h.stack.map(function(d) {
-	                    var entities = {};
+	  var result = nativeObjectToString$1.call(value);
 
-	                    for (var i in d.entities) {
-	                        var entity = d.entities[i];
-	                        entities[i] = entity === 'undefined' ? undefined : osmEntity(entity);
-	                    }
+	  if (unmasked) {
+	    if (isOwn) {
+	      value[symToStringTag$1] = tag;
+	    } else {
+	      delete value[symToStringTag$1];
+	    }
+	  }
 
-	                    d.graph = coreGraph(_stack[0].graph).load(entities);
-	                    return d;
-	                });
-	            }
+	  return result;
+	}
 
-	            var transform = _stack[_index].transform;
-	            if (transform) {
-	                context.map().transformEase(transform, 0);   // 0 = immediate, no easing
-	            }
+	/** Used for built-in method references. */
+	var objectProto = Object.prototype;
+	/**
+	 * Used to resolve the
+	 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+	 * of values.
+	 */
 
-	            if (loadComplete) {
-	                dispatch$1.call('change');
-	                dispatch$1.call('restore', this);
-	            }
+	var nativeObjectToString = objectProto.toString;
+	/**
+	 * Converts `value` to a string using `Object.prototype.toString`.
+	 *
+	 * @private
+	 * @param {*} value The value to convert.
+	 * @returns {string} Returns the converted string.
+	 */
 
-	            return history;
-	        },
+	function objectToString(value) {
+	  return nativeObjectToString.call(value);
+	}
 
+	/** `Object#toString` result references. */
 
-	        lock: function() {
-	            return lock.lock();
-	        },
+	var nullTag = '[object Null]',
+	    undefinedTag = '[object Undefined]';
+	/** Built-in value references. */
 
+	var symToStringTag = _Symbol ? _Symbol.toStringTag : undefined;
+	/**
+	 * The base implementation of `getTag` without fallbacks for buggy environments.
+	 *
+	 * @private
+	 * @param {*} value The value to query.
+	 * @returns {string} Returns the `toStringTag`.
+	 */
 
-	        unlock: function() {
-	            lock.unlock();
-	        },
+	function baseGetTag(value) {
+	  if (value == null) {
+	    return value === undefined ? undefinedTag : nullTag;
+	  }
 
+	  return symToStringTag && symToStringTag in Object(value) ? getRawTag(value) : objectToString(value);
+	}
 
-	        save: function() {
-	            if (lock.locked() &&
-	                // don't overwrite existing, unresolved changes
-	                !_hasUnresolvedRestorableChanges) {
+	/**
+	 * Checks if `value` is object-like. A value is object-like if it's not `null`
+	 * and has a `typeof` result of "object".
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 4.0.0
+	 * @category Lang
+	 * @param {*} value The value to check.
+	 * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+	 * @example
+	 *
+	 * _.isObjectLike({});
+	 * // => true
+	 *
+	 * _.isObjectLike([1, 2, 3]);
+	 * // => true
+	 *
+	 * _.isObjectLike(_.noop);
+	 * // => false
+	 *
+	 * _.isObjectLike(null);
+	 * // => false
+	 */
+	function isObjectLike(value) {
+	  return value != null && _typeof(value) == 'object';
+	}
 
-	                corePreferences(getKey('saved_history'), history.toJSON() || null);
-	            }
-	            return history;
-	        },
+	/** `Object#toString` result references. */
 
+	var symbolTag = '[object Symbol]';
+	/**
+	 * Checks if `value` is classified as a `Symbol` primitive or object.
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 4.0.0
+	 * @category Lang
+	 * @param {*} value The value to check.
+	 * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+	 * @example
+	 *
+	 * _.isSymbol(Symbol.iterator);
+	 * // => true
+	 *
+	 * _.isSymbol('abc');
+	 * // => false
+	 */
 
-	        // delete the history version saved in localStorage
-	        clearSaved: function() {
-	            context.debouncedSave.cancel();
-	            if (lock.locked()) {
-	                _hasUnresolvedRestorableChanges = false;
-	                corePreferences(getKey('saved_history'), null);
+	function isSymbol(value) {
+	  return _typeof(value) == 'symbol' || isObjectLike(value) && baseGetTag(value) == symbolTag;
+	}
 
-	                // clear the changeset metadata associated with the saved history
-	                corePreferences('comment', null);
-	                corePreferences('hashtags', null);
-	                corePreferences('source', null);
-	            }
-	            return history;
-	        },
+	/** Used as references for various `Number` constants. */
 
+	var NAN = 0 / 0;
+	/** Used to detect bad signed hexadecimal string values. */
 
-	        savedHistoryJSON: function() {
-	            return corePreferences(getKey('saved_history'));
-	        },
+	var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
+	/** Used to detect binary string values. */
 
+	var reIsBinary = /^0b[01]+$/i;
+	/** Used to detect octal string values. */
 
-	        hasRestorableChanges: function() {
-	            return _hasUnresolvedRestorableChanges;
-	        },
+	var reIsOctal = /^0o[0-7]+$/i;
+	/** Built-in method references without a dependency on `root`. */
 
+	var freeParseInt = parseInt;
+	/**
+	 * Converts `value` to a number.
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 4.0.0
+	 * @category Lang
+	 * @param {*} value The value to process.
+	 * @returns {number} Returns the number.
+	 * @example
+	 *
+	 * _.toNumber(3.2);
+	 * // => 3.2
+	 *
+	 * _.toNumber(Number.MIN_VALUE);
+	 * // => 5e-324
+	 *
+	 * _.toNumber(Infinity);
+	 * // => Infinity
+	 *
+	 * _.toNumber('3.2');
+	 * // => 3.2
+	 */
 
-	        // load history from a version stored in localStorage
-	        restore: function() {
-	            if (lock.locked()) {
-	                _hasUnresolvedRestorableChanges = false;
-	                var json = this.savedHistoryJSON();
-	                if (json) { history.fromJSON(json, true); }
-	            }
-	        },
+	function toNumber(value) {
+	  if (typeof value == 'number') {
+	    return value;
+	  }
 
+	  if (isSymbol(value)) {
+	    return NAN;
+	  }
 
-	        _getKey: getKey
+	  if (isObject$2(value)) {
+	    var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
+	    value = isObject$2(other) ? other + '' : other;
+	  }
 
-	    };
+	  if (typeof value != 'string') {
+	    return value === 0 ? value : +value;
+	  }
 
+	  value = baseTrim(value);
+	  var isBinary = reIsBinary.test(value);
+	  return isBinary || reIsOctal.test(value) ? freeParseInt(value.slice(2), isBinary ? 2 : 8) : reIsBadHex.test(value) ? NAN : +value;
+	}
 
-	    history.reset();
+	/** Error message constants. */
 
-	    return utilRebind(history, dispatch$1, 'on');
-	}
+	var FUNC_ERROR_TEXT$1 = 'Expected a function';
+	/* Built-in method references for those with the same name as other `lodash` methods. */
 
+	var nativeMax = Math.max,
+	    nativeMin = Math.min;
 	/**
-	 * Look for roads that can be connected to other roads with a short extension
+	 * Creates a debounced function that delays invoking `func` until after `wait`
+	 * milliseconds have elapsed since the last time the debounced function was
+	 * invoked. The debounced function comes with a `cancel` method to cancel
+	 * delayed `func` invocations and a `flush` method to immediately invoke them.
+	 * Provide `options` to indicate whether `func` should be invoked on the
+	 * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
+	 * with the last arguments provided to the debounced function. Subsequent
+	 * calls to the debounced function return the result of the last `func`
+	 * invocation.
+	 *
+	 * **Note:** If `leading` and `trailing` options are `true`, `func` is
+	 * invoked on the trailing edge of the timeout only if the debounced function
+	 * is invoked more than once during the `wait` timeout.
+	 *
+	 * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
+	 * until to the next tick, similar to `setTimeout` with a timeout of `0`.
+	 *
+	 * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
+	 * for details over the differences between `_.debounce` and `_.throttle`.
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 0.1.0
+	 * @category Function
+	 * @param {Function} func The function to debounce.
+	 * @param {number} [wait=0] The number of milliseconds to delay.
+	 * @param {Object} [options={}] The options object.
+	 * @param {boolean} [options.leading=false]
+	 *  Specify invoking on the leading edge of the timeout.
+	 * @param {number} [options.maxWait]
+	 *  The maximum time `func` is allowed to be delayed before it's invoked.
+	 * @param {boolean} [options.trailing=true]
+	 *  Specify invoking on the trailing edge of the timeout.
+	 * @returns {Function} Returns the new debounced function.
+	 * @example
+	 *
+	 * // Avoid costly calculations while the window size is in flux.
+	 * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
+	 *
+	 * // Invoke `sendMail` when clicked, debouncing subsequent calls.
+	 * jQuery(element).on('click', _.debounce(sendMail, 300, {
+	 *   'leading': true,
+	 *   'trailing': false
+	 * }));
+	 *
+	 * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
+	 * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
+	 * var source = new EventSource('/stream');
+	 * jQuery(source).on('message', debounced);
+	 *
+	 * // Cancel the trailing debounced invocation.
+	 * jQuery(window).on('popstate', debounced.cancel);
 	 */
-	function validationAlmostJunction(context) {
-	  var type = 'almost_junction';
-	  var EXTEND_TH_METERS = 5;
-	  var WELD_TH_METERS = 0.75;
-	  // Comes from considering bounding case of parallel ways
-	  var CLOSE_NODE_TH = EXTEND_TH_METERS - WELD_TH_METERS;
-	  // Comes from considering bounding case of perpendicular ways
-	  var SIG_ANGLE_TH = Math.atan(WELD_TH_METERS / EXTEND_TH_METERS);
 
-	  function isHighway(entity) {
-	    return entity.type === 'way'
-	      && osmRoutableHighwayTagValues[entity.tags.highway];
-	  }
+	function debounce(func, wait, options) {
+	  var lastArgs,
+	      lastThis,
+	      maxWait,
+	      result,
+	      timerId,
+	      lastCallTime,
+	      lastInvokeTime = 0,
+	      leading = false,
+	      maxing = false,
+	      trailing = true;
 
-	  function isTaggedAsNotContinuing(node) {
-	    return node.tags.noexit === 'yes'
-	      || node.tags.amenity === 'parking_entrance'
-	      || (node.tags.entrance && node.tags.entrance !== 'no');
+	  if (typeof func != 'function') {
+	    throw new TypeError(FUNC_ERROR_TEXT$1);
 	  }
 
+	  wait = toNumber(wait) || 0;
 
-	  var validation = function checkAlmostJunction(entity, graph) {
-	    if (!isHighway(entity)) { return []; }
-	    if (entity.isDegenerate()) { return []; }
+	  if (isObject$2(options)) {
+	    leading = !!options.leading;
+	    maxing = 'maxWait' in options;
+	    maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
+	    trailing = 'trailing' in options ? !!options.trailing : trailing;
+	  }
 
-	    var tree = context.history().tree();
-	    var extendableNodeInfos = findConnectableEndNodesByExtension(entity);
+	  function invokeFunc(time) {
+	    var args = lastArgs,
+	        thisArg = lastThis;
+	    lastArgs = lastThis = undefined;
+	    lastInvokeTime = time;
+	    result = func.apply(thisArg, args);
+	    return result;
+	  }
 
-	    var issues = [];
+	  function leadingEdge(time) {
+	    // Reset any `maxWait` timer.
+	    lastInvokeTime = time; // Start the timer for the trailing edge.
 
-	    extendableNodeInfos.forEach(function (extendableNodeInfo) {
-	      issues.push(new validationIssue({
-	        type: type,
-	        subtype: 'highway-highway',
-	        severity: 'warning',
-	        message: function message(context) {
-	          var entity1 = context.hasEntity(this.entityIds[0]);
-	          if (this.entityIds[0] === this.entityIds[2]) {
-	            return entity1 ? _t('issues.almost_junction.self.message', {
-	              feature: utilDisplayLabel(entity1, context.graph())
-	            }) : '';
-	          } else {
-	            var entity2 = context.hasEntity(this.entityIds[2]);
-	            return (entity1 && entity2) ? _t('issues.almost_junction.message', {
-	              feature: utilDisplayLabel(entity1, context.graph()),
-	              feature2: utilDisplayLabel(entity2, context.graph())
-	            }) : '';
-	          }
-	        },
-	        reference: showReference,
-	        entityIds: [
-	          entity.id,
-	          extendableNodeInfo.node.id,
-	          extendableNodeInfo.wid ],
-	        loc: extendableNodeInfo.node.loc,
-	        hash: JSON.stringify(extendableNodeInfo.node.loc),
-	        data: {
-	          midId: extendableNodeInfo.mid.id,
-	          edge: extendableNodeInfo.edge,
-	          cross_loc: extendableNodeInfo.cross_loc
-	        },
-	        dynamicFixes: makeFixes
-	      }));
-	    });
+	    timerId = setTimeout(timerExpired, wait); // Invoke the leading edge.
 
-	    return issues;
+	    return leading ? invokeFunc(time) : result;
+	  }
 
-	    function makeFixes(context) {
-	      var fixes = [new validationIssueFix({
-	        icon: 'iD-icon-abutment',
-	        title: _t('issues.fix.connect_features.title'),
-	        onClick: function onClick(context) {
-	          var annotation = _t('issues.fix.connect_almost_junction.annotation');
-	          var ref = this.issue.entityIds;
-	          var endNodeId = ref[1];
-	          var crossWayId = ref[2];
-	          var midNode = context.entity(this.issue.data.midId);
-	          var endNode = context.entity(endNodeId);
-	          var crossWay = context.entity(crossWayId);
+	  function remainingWait(time) {
+	    var timeSinceLastCall = time - lastCallTime,
+	        timeSinceLastInvoke = time - lastInvokeTime,
+	        timeWaiting = wait - timeSinceLastCall;
+	    return maxing ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke) : timeWaiting;
+	  }
 
-	          // When endpoints are close, just join if resulting small change in angle (#7201)
-	          var nearEndNodes = findNearbyEndNodes(endNode, crossWay);
-	          if (nearEndNodes.length > 0) {
-	            var collinear = findSmallJoinAngle(midNode, endNode, nearEndNodes);
-	            if (collinear) {
-	              context.perform(
-	                actionMergeNodes([collinear.id, endNode.id], collinear.loc),
-	                annotation
-	              );
-	              return;
-	            }
-	          }
+	  function shouldInvoke(time) {
+	    var timeSinceLastCall = time - lastCallTime,
+	        timeSinceLastInvoke = time - lastInvokeTime; // Either this is the first call, activity has stopped and we're at the
+	    // trailing edge, the system time has gone backwards and we're treating
+	    // it as the trailing edge, or we've hit the `maxWait` limit.
 
-	          var targetEdge = this.issue.data.edge;
-	          var crossLoc = this.issue.data.cross_loc;
-	          var edgeNodes = [context.entity(targetEdge[0]), context.entity(targetEdge[1])];
-	          var closestNodeInfo = geoSphericalClosestNode(edgeNodes, crossLoc);
+	    return lastCallTime === undefined || timeSinceLastCall >= wait || timeSinceLastCall < 0 || maxing && timeSinceLastInvoke >= maxWait;
+	  }
 
-	          // already a point nearby, just connect to that
-	          if (closestNodeInfo.distance < WELD_TH_METERS) {
-	            context.perform(
-	              actionMergeNodes([closestNodeInfo.node.id, endNode.id], closestNodeInfo.node.loc),
-	              annotation
-	            );
-	          // else add the end node to the edge way
-	          } else {
-	            context.perform(
-	              actionAddMidpoint({loc: crossLoc, edge: targetEdge}, endNode),
-	              annotation
-	            );
-	          }
-	        }
-	      })];
+	  function timerExpired() {
+	    var time = now();
 
-	      var node = context.hasEntity(this.entityIds[1]);
-	      if (node && !node.hasInterestingTags()) {
-	        // node has no descriptive tags, suggest noexit fix
-	        fixes.push(new validationIssueFix({
-	          icon: 'maki-barrier',
-	          title: _t('issues.fix.tag_as_disconnected.title'),
-	          onClick: function onClick(context) {
-	            var nodeID = this.issue.entityIds[1];
-	            var tags = Object.assign({}, context.entity(nodeID).tags);
-	            tags.noexit = 'yes';
-	            context.perform(
-	              actionChangeTags(nodeID, tags),
-	              _t('issues.fix.tag_as_disconnected.annotation')
-	            );
-	          }
-	        }));
-	      }
+	    if (shouldInvoke(time)) {
+	      return trailingEdge(time);
+	    } // Restart the timer.
 
-	      return fixes;
-	    }
 
-	    function showReference(selection) {
-	      selection.selectAll('.issue-reference')
-	        .data([0])
-	        .enter()
-	        .append('div')
-	        .attr('class', 'issue-reference')
-	        .text(_t('issues.almost_junction.highway-highway.reference'));
-	    }
+	    timerId = setTimeout(timerExpired, remainingWait(time));
+	  }
 
-	    function isExtendableCandidate(node, way) {
-	      // can not accurately test vertices on tiles not downloaded from osm - #5938
-	      var osm = services.osm;
-	      if (osm && !osm.isDataLoaded(node.loc)) {
-	        return false;
-	      }
-	      if (isTaggedAsNotContinuing(node) || graph.parentWays(node).length !== 1) {
-	        return false;
-	      }
+	  function trailingEdge(time) {
+	    timerId = undefined; // Only invoke if we have `lastArgs` which means `func` has been
+	    // debounced at least once.
 
-	      var occurences = 0;
-	      for (var index in way.nodes) {
-	        if (way.nodes[index] === node.id) {
-	          occurences += 1;
-	          if (occurences > 1) {
-	            return false;
-	          }
-	        }
-	      }
-	      return true;
+	    if (trailing && lastArgs) {
+	      return invokeFunc(time);
 	    }
 
-	    function findConnectableEndNodesByExtension(way) {
-	      var results = [];
-	      if (way.isClosed()) { return results; }
-
-	      var testNodes;
-	      var indices = [0, way.nodes.length - 1];
-	      indices.forEach(function (nodeIndex) {
-	        var nodeID = way.nodes[nodeIndex];
-	        var node = graph.entity(nodeID);
+	    lastArgs = lastThis = undefined;
+	    return result;
+	  }
 
-	        if (!isExtendableCandidate(node, way)) { return; }
+	  function cancel() {
+	    if (timerId !== undefined) {
+	      clearTimeout(timerId);
+	    }
 
-	        var connectionInfo = canConnectByExtend(way, nodeIndex);
-	        if (!connectionInfo) { return; }
+	    lastInvokeTime = 0;
+	    lastArgs = lastCallTime = lastThis = timerId = undefined;
+	  }
 
-	        testNodes = graph.childNodes(way).slice();   // shallow copy
-	        testNodes[nodeIndex] = testNodes[nodeIndex].move(connectionInfo.cross_loc);
+	  function flush() {
+	    return timerId === undefined ? result : trailingEdge(now());
+	  }
 
-	        // don't flag issue if connecting the ways would cause self-intersection
-	        if (geoHasSelfIntersections(testNodes, nodeID)) { return; }
+	  function debounced() {
+	    var time = now(),
+	        isInvoking = shouldInvoke(time);
+	    lastArgs = arguments;
+	    lastThis = this;
+	    lastCallTime = time;
 
-	        results.push(connectionInfo);
-	      });
+	    if (isInvoking) {
+	      if (timerId === undefined) {
+	        return leadingEdge(lastCallTime);
+	      }
 
-	      return results;
+	      if (maxing) {
+	        // Handle invocations in a tight loop.
+	        clearTimeout(timerId);
+	        timerId = setTimeout(timerExpired, wait);
+	        return invokeFunc(lastCallTime);
+	      }
 	    }
 
-	    function findNearbyEndNodes(node, way) {
-	      return [
-	        way.nodes[0],
-	        way.nodes[way.nodes.length - 1]
-	      ].map(function (d) { return graph.entity(d); })
-	      .filter(function (d) {
-	        // Node cannot be near to itself, but other endnode of same way could be
-	        return d.id !== node.id
-	          && geoSphericalDistance(node.loc, d.loc) <= CLOSE_NODE_TH;
-	      });
+	    if (timerId === undefined) {
+	      timerId = setTimeout(timerExpired, wait);
 	    }
 
-	    function findSmallJoinAngle(midNode, tipNode, endNodes) {
-	      // Both nodes could be close, so want to join whichever is closest to collinear
-	      var joinTo;
-	      var minAngle = Infinity;
+	    return result;
+	  }
 
-	      // Checks midNode -> tipNode -> endNode for collinearity
-	      endNodes.forEach(function (endNode) {
-	        var a1 = geoAngle(midNode, tipNode, context.projection) + Math.PI;
-	        var a2 = geoAngle(midNode, endNode, context.projection) + Math.PI;
-	        var diff = Math.max(a1, a2) - Math.min(a1, a2);
+	  debounced.cancel = cancel;
+	  debounced.flush = flush;
+	  return debounced;
+	}
 
-	        if (diff < minAngle) {
-	          joinTo = endNode;
-	          minAngle = diff;
-	        }
-	      });
+	/*
+	    iD.coreDifference represents the difference between two graphs.
+	    It knows how to calculate the set of entities that were
+	    created, modified, or deleted, and also contains the logic
+	    for recursively extending a difference to the complete set
+	    of entities that will require a redraw, taking into account
+	    child and parent relationships.
+	 */
 
-	      /* Threshold set by considering right angle triangle
-	      based on node joining threshold and extension distance */
-	      if (minAngle <= SIG_ANGLE_TH) { return joinTo; }
+	function coreDifference(base, head) {
+	  var _changes = {};
+	  var _didChange = {}; // 'addition', 'deletion', 'geometry', 'properties'
 
-	      return null;
+	  var _diff = {};
+
+	  function checkEntityID(id) {
+	    var h = head.entities[id];
+	    var b = base.entities[id];
+	    if (h === b) return;
+	    if (_changes[id]) return;
+
+	    if (!h && b) {
+	      _changes[id] = {
+	        base: b,
+	        head: h
+	      };
+	      _didChange.deletion = true;
+	      return;
 	    }
 
-	    function hasTag(tags, key) {
-	      return tags[key] !== undefined && tags[key] !== 'no';
+	    if (h && !b) {
+	      _changes[id] = {
+	        base: b,
+	        head: h
+	      };
+	      _didChange.addition = true;
+	      return;
 	    }
 
-	    function canConnectWays(way, way2) {
+	    if (h && b) {
+	      if (h.members && b.members && !fastDeepEqual(h.members, b.members)) {
+	        _changes[id] = {
+	          base: b,
+	          head: h
+	        };
+	        _didChange.geometry = true;
+	        _didChange.properties = true;
+	        return;
+	      }
 
-	      // allow self-connections
-	      if (way.id === way2.id) { return true; }
+	      if (h.loc && b.loc && !geoVecEqual(h.loc, b.loc)) {
+	        _changes[id] = {
+	          base: b,
+	          head: h
+	        };
+	        _didChange.geometry = true;
+	      }
 
-	      // if one is bridge or tunnel, both must be bridge or tunnel
-	      if ((hasTag(way.tags, 'bridge') || hasTag(way2.tags, 'bridge')) &&
-	        !(hasTag(way.tags, 'bridge') && hasTag(way2.tags, 'bridge'))) { return false; }
-	      if ((hasTag(way.tags, 'tunnel') || hasTag(way2.tags, 'tunnel')) &&
-	        !(hasTag(way.tags, 'tunnel') && hasTag(way2.tags, 'tunnel'))) { return false; }
+	      if (h.nodes && b.nodes && !fastDeepEqual(h.nodes, b.nodes)) {
+	        _changes[id] = {
+	          base: b,
+	          head: h
+	        };
+	        _didChange.geometry = true;
+	      }
 
-	      // must have equivalent layers and levels
-	      var layer1 = way.tags.layer || '0',
-	        layer2 = way2.tags.layer || '0';
-	      if (layer1 !== layer2) { return false; }
+	      if (h.tags && b.tags && !fastDeepEqual(h.tags, b.tags)) {
+	        _changes[id] = {
+	          base: b,
+	          head: h
+	        };
+	        _didChange.properties = true;
+	      }
+	    }
+	  }
 
-	      var level1 = way.tags.level || '0',
-	        level2 = way2.tags.level || '0';
-	      if (level1 !== level2) { return false; }
+	  function load() {
+	    // HOT CODE: there can be many thousands of downloaded entities, so looping
+	    // through them all can become a performance bottleneck. Optimize by
+	    // resolving duplicates and using a basic `for` loop
+	    var ids = utilArrayUniq(Object.keys(head.entities).concat(Object.keys(base.entities)));
 
-	      return true;
+	    for (var i = 0; i < ids.length; i++) {
+	      checkEntityID(ids[i]);
 	    }
+	  }
 
-	    function canConnectByExtend(way, endNodeIdx) {
-	      var tipNid = way.nodes[endNodeIdx];  // the 'tip' node for extension point
-	      var midNid = endNodeIdx === 0 ? way.nodes[1] : way.nodes[way.nodes.length - 2];  // the other node of the edge
-	      var tipNode = graph.entity(tipNid);
-	      var midNode = graph.entity(midNid);
-	      var lon = tipNode.loc[0];
-	      var lat = tipNode.loc[1];
-	      var lon_range = geoMetersToLon(EXTEND_TH_METERS, lat) / 2;
-	      var lat_range = geoMetersToLat(EXTEND_TH_METERS) / 2;
-	      var queryExtent = geoExtent([
-	        [lon - lon_range, lat - lat_range],
-	        [lon + lon_range, lat + lat_range]
-	      ]);
-
-	      // first, extend the edge of [midNode -> tipNode] by EXTEND_TH_METERS and find the "extended tip" location
-	      var edgeLen = geoSphericalDistance(midNode.loc, tipNode.loc);
-	      var t = EXTEND_TH_METERS / edgeLen + 1.0;
-	      var extTipLoc = geoVecInterp(midNode.loc, tipNode.loc, t);
+	  load();
 
-	      // then, check if the extension part [tipNode.loc -> extTipLoc] intersects any other ways
-	      var segmentInfos = tree.waySegments(queryExtent, graph);
-	      for (var i = 0; i < segmentInfos.length; i++) {
-	        var segmentInfo = segmentInfos[i];
+	  _diff.length = function length() {
+	    return Object.keys(_changes).length;
+	  };
 
-	        var way2 = graph.entity(segmentInfo.wayId);
+	  _diff.changes = function changes() {
+	    return _changes;
+	  };
 
-	        if (!isHighway(way2)) { continue; }
+	  _diff.didChange = _didChange; // pass true to include affected relation members
 
-	        if (!canConnectWays(way, way2)) { continue; }
+	  _diff.extantIDs = function extantIDs(includeRelMembers) {
+	    var result = new Set();
+	    Object.keys(_changes).forEach(function (id) {
+	      if (_changes[id].head) {
+	        result.add(id);
+	      }
 
-	        var nAid = segmentInfo.nodes[0],
-	          nBid = segmentInfo.nodes[1];
+	      var h = _changes[id].head;
+	      var b = _changes[id].base;
+	      var entity = h || b;
+
+	      if (includeRelMembers && entity.type === 'relation') {
+	        var mh = h ? h.members.map(function (m) {
+	          return m.id;
+	        }) : [];
+	        var mb = b ? b.members.map(function (m) {
+	          return m.id;
+	        }) : [];
+	        utilArrayUnion(mh, mb).forEach(function (memberID) {
+	          if (head.hasEntity(memberID)) {
+	            result.add(memberID);
+	          }
+	        });
+	      }
+	    });
+	    return Array.from(result);
+	  };
 
-	        if (nAid === tipNid || nBid === tipNid) { continue; }
+	  _diff.modified = function modified() {
+	    var result = [];
+	    Object.values(_changes).forEach(function (change) {
+	      if (change.base && change.head) {
+	        result.push(change.head);
+	      }
+	    });
+	    return result;
+	  };
 
-	        var nA = graph.entity(nAid),
-	          nB = graph.entity(nBid);
-	        var crossLoc = geoLineIntersection([tipNode.loc, extTipLoc], [nA.loc, nB.loc]);
-	        if (crossLoc) {
-	          return {
-	            mid: midNode,
-	            node: tipNode,
-	            wid: way2.id,
-	            edge: [nA.id, nB.id],
-	            cross_loc: crossLoc
-	          };
-	        }
+	  _diff.created = function created() {
+	    var result = [];
+	    Object.values(_changes).forEach(function (change) {
+	      if (!change.base && change.head) {
+	        result.push(change.head);
 	      }
-	      return null;
-	    }
+	    });
+	    return result;
 	  };
 
-	  validation.type = type;
+	  _diff.deleted = function deleted() {
+	    var result = [];
+	    Object.values(_changes).forEach(function (change) {
+	      if (change.base && !change.head) {
+	        result.push(change.base);
+	      }
+	    });
+	    return result;
+	  };
 
-	  return validation;
-	}
+	  _diff.summary = function summary() {
+	    var relevant = {};
+	    var keys = Object.keys(_changes);
 
-	function validationCloseNodes(context) {
-	    var type = 'close_nodes';
+	    for (var i = 0; i < keys.length; i++) {
+	      var change = _changes[keys[i]];
 
-	    var pointThresholdMeters = 0.2;
+	      if (change.head && change.head.geometry(head) !== 'vertex') {
+	        addEntity(change.head, head, change.base ? 'modified' : 'created');
+	      } else if (change.base && change.base.geometry(base) !== 'vertex') {
+	        addEntity(change.base, base, 'deleted');
+	      } else if (change.base && change.head) {
+	        // modified vertex
+	        var moved = !fastDeepEqual(change.base.loc, change.head.loc);
+	        var retagged = !fastDeepEqual(change.base.tags, change.head.tags);
 
-	    var validation = function(entity, graph) {
-	        if (entity.type === 'node') {
-	            return getIssuesForNode(entity);
-	        } else if (entity.type === 'way') {
-	            return getIssuesForWay(entity);
+	        if (moved) {
+	          addParents(change.head);
 	        }
-	        return [];
 
-	        function getIssuesForNode(node) {
-	            var parentWays = graph.parentWays(node);
-	            if (parentWays.length) {
-	                return getIssuesForVertex(node, parentWays);
-	            } else {
-	                return getIssuesForDetachedPoint(node);
-	            }
+	        if (retagged || moved && change.head.hasInterestingTags()) {
+	          addEntity(change.head, head, 'modified');
 	        }
+	      } else if (change.head && change.head.hasInterestingTags()) {
+	        // created vertex
+	        addEntity(change.head, head, 'created');
+	      } else if (change.base && change.base.hasInterestingTags()) {
+	        // deleted vertex
+	        addEntity(change.base, base, 'deleted');
+	      }
+	    }
 
-	        function wayTypeFor(way) {
-
-	            if (way.tags.boundary && way.tags.boundary !== 'no') { return 'boundary'; }
-	            if (way.tags.indoor && way.tags.indoor !== 'no') { return 'indoor'; }
-	            if ((way.tags.building && way.tags.building !== 'no') ||
-	                (way.tags['building:part'] && way.tags['building:part'] !== 'no')) { return 'building'; }
-	            if (osmPathHighwayTagValues[way.tags.highway]) { return 'path'; }
+	    return Object.values(relevant);
 
-	            var parentRelations = graph.parentRelations(way);
-	            for (var i in parentRelations) {
-	                var relation = parentRelations[i];
+	    function addEntity(entity, graph, changeType) {
+	      relevant[entity.id] = {
+	        entity: entity,
+	        graph: graph,
+	        changeType: changeType
+	      };
+	    }
 
-	                if (relation.tags.type === 'boundary') { return 'boundary'; }
+	    function addParents(entity) {
+	      var parents = head.parentWays(entity);
 
-	                if (relation.isMultipolygon()) {
-	                    if (relation.tags.indoor && relation.tags.indoor !== 'no') { return 'indoor'; }
-	                    if ((relation.tags.building && relation.tags.building !== 'no') ||
-	                        (relation.tags['building:part'] && relation.tags['building:part'] !== 'no')) { return 'building'; }
-	                }
-	            }
+	      for (var j = parents.length - 1; j >= 0; j--) {
+	        var parent = parents[j];
 
-	            return 'other';
+	        if (!(parent.id in relevant)) {
+	          addEntity(parent, head, 'modified');
 	        }
+	      }
+	    }
+	  }; // returns complete set of entities that require a redraw
+	  //  (optionally within given `extent`)
 
-	        function shouldCheckWay(way) {
 
-	            // don't flag issues where merging would create degenerate ways
-	            if (way.nodes.length <= 2 ||
-	                (way.isClosed() && way.nodes.length <= 4)) { return false; }
+	  _diff.complete = function complete(extent) {
+	    var result = {};
+	    var id, change;
 
-	            var bbox = way.extent(graph).bbox();
-	            var hypotenuseMeters = geoSphericalDistance([bbox.minX, bbox.minY], [bbox.maxX, bbox.maxY]);
-	            // don't flag close nodes in very small ways
-	            if (hypotenuseMeters < 1.5) { return false; }
+	    for (id in _changes) {
+	      change = _changes[id];
+	      var h = change.head;
+	      var b = change.base;
+	      var entity = h || b;
+	      var i;
 
-	            return true;
-	        }
+	      if (extent && (!h || !h.intersects(extent, head)) && (!b || !b.intersects(extent, base))) {
+	        continue;
+	      }
 
-	        function getIssuesForWay(way) {
-	            if (!shouldCheckWay(way)) { return []; }
+	      result[id] = h;
 
-	            var issues = [],
-	                nodes = graph.childNodes(way);
-	            for (var i = 0; i < nodes.length - 1; i++) {
-	                var node1 = nodes[i];
-	                var node2 = nodes[i+1];
+	      if (entity.type === 'way') {
+	        var nh = h ? h.nodes : [];
+	        var nb = b ? b.nodes : [];
+	        var diff;
+	        diff = utilArrayDifference(nh, nb);
 
-	                var issue = getWayIssueIfAny(node1, node2, way);
-	                if (issue) { issues.push(issue); }
-	            }
-	            return issues;
+	        for (i = 0; i < diff.length; i++) {
+	          result[diff[i]] = head.hasEntity(diff[i]);
 	        }
 
-	        function getIssuesForVertex(node, parentWays) {
-	            var issues = [];
+	        diff = utilArrayDifference(nb, nh);
 
-	            function checkForCloseness(node1, node2, way) {
-	                var issue = getWayIssueIfAny(node1, node2, way);
-	                if (issue) { issues.push(issue); }
-	            }
+	        for (i = 0; i < diff.length; i++) {
+	          result[diff[i]] = head.hasEntity(diff[i]);
+	        }
+	      }
 
-	            for (var i = 0; i < parentWays.length; i++) {
-	                var parentWay = parentWays[i];
+	      if (entity.type === 'relation' && entity.isMultipolygon()) {
+	        var mh = h ? h.members.map(function (m) {
+	          return m.id;
+	        }) : [];
+	        var mb = b ? b.members.map(function (m) {
+	          return m.id;
+	        }) : [];
+	        var ids = utilArrayUnion(mh, mb);
 
-	                if (!shouldCheckWay(parentWay)) { continue; }
+	        for (i = 0; i < ids.length; i++) {
+	          var member = head.hasEntity(ids[i]);
+	          if (!member) continue; // not downloaded
 
-	                var lastIndex = parentWay.nodes.length - 1;
-	                for (var j = 0; j < parentWay.nodes.length; j++) {
-	                    if (j !== 0) {
-	                        if (parentWay.nodes[j-1] === node.id) {
-	                            checkForCloseness(node, graph.entity(parentWay.nodes[j]), parentWay);
-	                        }
-	                    }
-	                    if (j !== lastIndex) {
-	                        if (parentWay.nodes[j+1] === node.id) {
-	                            checkForCloseness(graph.entity(parentWay.nodes[j]), node, parentWay);
-	                        }
-	                    }
-	                }
-	            }
-	            return issues;
+	          if (extent && !member.intersects(extent, head)) continue; // not visible
+
+	          result[ids[i]] = member;
 	        }
+	      }
 
-	        function thresholdMetersForWay(way) {
-	            if (!shouldCheckWay(way)) { return 0; }
+	      addParents(head.parentWays(entity), result);
+	      addParents(head.parentRelations(entity), result);
+	    }
 
-	            var wayType = wayTypeFor(way);
+	    return result;
 
-	            // don't flag boundaries since they might be highly detailed and can't be easily verified
-	            if (wayType === 'boundary') { return 0; }
-	            // expect some features to be mapped with higher levels of detail
-	            if (wayType === 'indoor') { return 0.01; }
-	            if (wayType === 'building') { return 0.05; }
-	            if (wayType === 'path') { return 0.1; }
-	            return 0.2;
-	        }
+	    function addParents(parents, result) {
+	      for (var i = 0; i < parents.length; i++) {
+	        var parent = parents[i];
+	        if (parent.id in result) continue;
+	        result[parent.id] = parent;
+	        addParents(head.parentRelations(parent), result);
+	      }
+	    }
+	  };
 
-	        function getIssuesForDetachedPoint(node) {
+	  return _diff;
+	}
 
-	            var issues = [];
+	function coreTree(head) {
+	  // tree for entities
+	  var _rtree = new RBush();
 
-	            var lon = node.loc[0];
-	            var lat = node.loc[1];
-	            var lon_range = geoMetersToLon(pointThresholdMeters, lat) / 2;
-	            var lat_range = geoMetersToLat(pointThresholdMeters) / 2;
-	            var queryExtent = geoExtent([
-	                [lon - lon_range, lat - lat_range],
-	                [lon + lon_range, lat + lat_range]
-	            ]);
+	  var _bboxes = {}; // maintain a separate tree for granular way segments
 
-	            var intersected = context.history().tree().intersects(queryExtent, graph);
-	            for (var j = 0; j < intersected.length; j++) {
-	                var nearby = intersected[j];
+	  var _segmentsRTree = new RBush();
 
-	                if (nearby.id === node.id) { continue; }
-	                if (nearby.type !== 'node' || nearby.geometry(graph) !== 'point') { continue; }
+	  var _segmentsBBoxes = {};
+	  var _segmentsByWayId = {};
+	  var tree = {};
 
-	                if (nearby.loc === node.loc ||
-	                    geoSphericalDistance(node.loc, nearby.loc) < pointThresholdMeters) {
+	  function entityBBox(entity) {
+	    var bbox = entity.extent(head).bbox();
+	    bbox.id = entity.id;
+	    _bboxes[entity.id] = bbox;
+	    return bbox;
+	  }
 
-	                    // allow very close points if tags indicate the z-axis might vary
-	                    var zAxisKeys = { layer: true, level: true, 'addr:housenumber': true, 'addr:unit': true };
-	                    var zAxisDifferentiates = false;
-	                    for (var key in zAxisKeys) {
-	                        var nodeValue = node.tags[key] || '0';
-	                        var nearbyValue = nearby.tags[key] || '0';
-	                        if (nodeValue !== nearbyValue) {
-	                            zAxisDifferentiates = true;
-	                            break;
-	                        }
-	                    }
-	                    if (zAxisDifferentiates) { continue; }
-
-	                    issues.push(new validationIssue({
-	                        type: type,
-	                        subtype: 'detached',
-	                        severity: 'warning',
-	                        message: function(context) {
-	                            var entity = context.hasEntity(this.entityIds[0]),
-	                                entity2 = context.hasEntity(this.entityIds[1]);
-	                            return (entity && entity2) ? _t('issues.close_nodes.detached.message', {
-	                                feature: utilDisplayLabel(entity, context.graph()),
-	                                feature2: utilDisplayLabel(entity2, context.graph())
-	                            }) : '';
-	                        },
-	                        reference: showReference,
-	                        entityIds: [node.id, nearby.id],
-	                        dynamicFixes: function() {
-	                            return [
-	                                new validationIssueFix({
-	                                    icon: 'iD-operation-disconnect',
-	                                    title: _t('issues.fix.move_points_apart.title')
-	                                }),
-	                                new validationIssueFix({
-	                                    icon: 'iD-icon-layers',
-	                                    title: _t('issues.fix.use_different_layers_or_levels.title')
-	                                })
-	                            ];
-	                        }
-	                    }));
-	                }
-	            }
+	  function segmentBBox(segment) {
+	    var extent = segment.extent(head); // extent can be null if the node entities aren't in the graph for some reason
 
-	            return issues;
+	    if (!extent) return null;
+	    var bbox = extent.bbox();
+	    bbox.segment = segment;
+	    _segmentsBBoxes[segment.id] = bbox;
+	    return bbox;
+	  }
 
-	            function showReference(selection) {
-	                var referenceText = _t('issues.close_nodes.detached.reference');
-	                selection.selectAll('.issue-reference')
-	                    .data([0])
-	                    .enter()
-	                    .append('div')
-	                    .attr('class', 'issue-reference')
-	                    .text(referenceText);
-	            }
-	        }
+	  function removeEntity(entity) {
+	    _rtree.remove(_bboxes[entity.id]);
 
-	        function getWayIssueIfAny(node1, node2, way) {
-	            if (node1.id === node2.id ||
-	                (node1.hasInterestingTags() && node2.hasInterestingTags())) {
-	                return null;
-	            }
+	    delete _bboxes[entity.id];
 
-	            if (node1.loc !== node2.loc) {
-	                var parentWays1 = graph.parentWays(node1);
-	                var parentWays2 = new Set(graph.parentWays(node2));
+	    if (_segmentsByWayId[entity.id]) {
+	      _segmentsByWayId[entity.id].forEach(function (segment) {
+	        _segmentsRTree.remove(_segmentsBBoxes[segment.id]);
 
-	                var sharedWays = parentWays1.filter(function(parentWay) {
-	                    return parentWays2.has(parentWay);
-	                });
+	        delete _segmentsBBoxes[segment.id];
+	      });
 
-	                var thresholds = sharedWays.map(function(parentWay) {
-	                    return thresholdMetersForWay(parentWay);
-	                });
+	      delete _segmentsByWayId[entity.id];
+	    }
+	  }
 
-	                var threshold = Math.min.apply(Math, thresholds);
-	                var distance = geoSphericalDistance(node1.loc, node2.loc);
-	                if (distance > threshold) { return null; }
-	            }
+	  function loadEntities(entities) {
+	    _rtree.load(entities.map(entityBBox));
 
-	            return new validationIssue({
-	                type: type,
-	                subtype: 'vertices',
-	                severity: 'warning',
-	                message: function(context) {
-	                    var entity = context.hasEntity(this.entityIds[0]);
-	                    return entity ? _t('issues.close_nodes.message', { way: utilDisplayLabel(entity, context.graph()) }) : '';
-	                },
-	                reference: showReference,
-	                entityIds: [way.id, node1.id, node2.id],
-	                loc: node1.loc,
-	                dynamicFixes: function() {
-	                    return [
-	                        new validationIssueFix({
-	                            icon: 'iD-icon-plus',
-	                            title: _t('issues.fix.merge_points.title'),
-	                            onClick: function(context) {
-	                                var entityIds = this.issue.entityIds;
-	                                var action = actionMergeNodes([entityIds[1], entityIds[2]]);
-	                                context.perform(action, _t('issues.fix.merge_close_vertices.annotation'));
-	                            }
-	                        }),
-	                        new validationIssueFix({
-	                            icon: 'iD-operation-disconnect',
-	                            title: _t('issues.fix.move_points_apart.title')
-	                        })
-	                    ];
-	                }
-	            });
+	    var segments = [];
+	    entities.forEach(function (entity) {
+	      if (entity.segments) {
+	        var entitySegments = entity.segments(head); // cache these to make them easy to remove later
 
-	            function showReference(selection) {
-	                var referenceText = _t('issues.close_nodes.reference');
-	                selection.selectAll('.issue-reference')
-	                    .data([0])
-	                    .enter()
-	                    .append('div')
-	                    .attr('class', 'issue-reference')
-	                    .text(referenceText);
-	            }
-	        }
+	        _segmentsByWayId[entity.id] = entitySegments;
+	        segments = segments.concat(entitySegments);
+	      }
+	    });
+	    if (segments.length) _segmentsRTree.load(segments.map(segmentBBox).filter(Boolean));
+	  }
 
-	    };
+	  function updateParents(entity, insertions, memo) {
+	    head.parentWays(entity).forEach(function (way) {
+	      if (_bboxes[way.id]) {
+	        removeEntity(way);
+	        insertions[way.id] = way;
+	      }
+
+	      updateParents(way, insertions, memo);
+	    });
+	    head.parentRelations(entity).forEach(function (relation) {
+	      if (memo[entity.id]) return;
+	      memo[entity.id] = true;
 
+	      if (_bboxes[relation.id]) {
+	        removeEntity(relation);
+	        insertions[relation.id] = relation;
+	      }
 
-	    validation.type = type;
+	      updateParents(relation, insertions, memo);
+	    });
+	  }
 
-	    return validation;
-	}
+	  tree.rebase = function (entities, force) {
+	    var insertions = {};
 
-	function validationCrossingWays(context) {
-	    var type = 'crossing_ways';
-
-	    // returns the way or its parent relation, whichever has a useful feature type
-	    function getFeatureWithFeatureTypeTagsForWay(way, graph) {
-	        if (getFeatureType(way, graph) === null) {
-	            // if the way doesn't match a feature type, check its parent relations
-	            var parentRels = graph.parentRelations(way);
-	            for (var i = 0; i < parentRels.length; i++) {
-	                var rel = parentRels[i];
-	                if (getFeatureType(rel, graph) !== null) {
-	                    return rel;
-	                }
-	            }
+	    for (var i = 0; i < entities.length; i++) {
+	      var entity = entities[i];
+	      if (!entity.visible) continue;
+
+	      if (head.entities.hasOwnProperty(entity.id) || _bboxes[entity.id]) {
+	        if (!force) {
+	          continue;
+	        } else if (_bboxes[entity.id]) {
+	          removeEntity(entity);
 	        }
-	        return way;
+	      }
+
+	      insertions[entity.id] = entity;
+	      updateParents(entity, insertions, {});
 	    }
 
+	    loadEntities(Object.values(insertions));
+	    return tree;
+	  };
 
-	    function hasTag(tags, key) {
-	        return tags[key] !== undefined && tags[key] !== 'no';
-	    }
+	  function updateToGraph(graph) {
+	    if (graph === head) return;
+	    var diff = coreDifference(head, graph);
+	    head = graph;
+	    var changed = diff.didChange;
+	    if (!changed.addition && !changed.deletion && !changed.geometry) return;
+	    var insertions = {};
 
-	    function taggedAsIndoor(tags) {
-	        return hasTag(tags, 'indoor') ||
-	            hasTag(tags, 'level') ||
-	            tags.highway === 'corridor';
+	    if (changed.deletion) {
+	      diff.deleted().forEach(function (entity) {
+	        removeEntity(entity);
+	      });
 	    }
 
-	    function allowsBridge(featureType) {
-	        return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
+	    if (changed.geometry) {
+	      diff.modified().forEach(function (entity) {
+	        removeEntity(entity);
+	        insertions[entity.id] = entity;
+	        updateParents(entity, insertions, {});
+	      });
 	    }
-	    function allowsTunnel(featureType) {
-	        return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
+
+	    if (changed.addition) {
+	      diff.created().forEach(function (entity) {
+	        insertions[entity.id] = entity;
+	      });
 	    }
 
-	    // discard
-	    var ignoredBuildings = {
-	        demolished: true, dismantled: true, proposed: true, razed: true
-	    };
+	    loadEntities(Object.values(insertions));
+	  } // returns an array of entities with bounding boxes overlapping `extent` for the given `graph`
 
 
-	    function getFeatureType(entity, graph) {
+	  tree.intersects = function (extent, graph) {
+	    updateToGraph(graph);
+	    return _rtree.search(extent.bbox()).map(function (bbox) {
+	      return graph.entity(bbox.id);
+	    });
+	  }; // returns an array of segment objects with bounding boxes overlapping `extent` for the given `graph`
 
-	        var geometry = entity.geometry(graph);
-	        if (geometry !== 'line' && geometry !== 'area') { return null; }
 
-	        var tags = entity.tags;
+	  tree.waySegments = function (extent, graph) {
+	    updateToGraph(graph);
+	    return _segmentsRTree.search(extent.bbox()).map(function (bbox) {
+	      return bbox.segment;
+	    });
+	  };
 
-	        if (hasTag(tags, 'building') && !ignoredBuildings[tags.building]) { return 'building'; }
-	        if (hasTag(tags, 'highway') && osmRoutableHighwayTagValues[tags.highway]) { return 'highway'; }
+	  return tree;
+	}
 
-	        // don't check railway or waterway areas
-	        if (geometry !== 'line') { return null; }
+	function svgIcon(name, svgklass, useklass) {
+	  return function drawIcon(selection) {
+	    selection.selectAll('svg.icon' + (svgklass ? '.' + svgklass.split(' ')[0] : '')).data([0]).enter().append('svg').attr('class', 'icon ' + (svgklass || '')).append('use').attr('xlink:href', name).attr('class', useklass);
+	  };
+	}
 
-	        if (hasTag(tags, 'railway') && osmRailwayTrackTagValues[tags.railway]) { return 'railway'; }
-	        if (hasTag(tags, 'waterway') && osmFlowingWaterwayTagValues[tags.waterway]) { return 'waterway'; }
+	function uiModal(selection, blocking) {
+	  var _this = this;
 
-	        return null;
-	    }
+	  var keybinding = utilKeybinding('modal');
+	  var previous = selection.select('div.modal');
+	  var animate = previous.empty();
+	  previous.transition().duration(200).style('opacity', 0).remove();
+	  var shaded = selection.append('div').attr('class', 'shaded').style('opacity', 0);
+
+	  shaded.close = function () {
+	    shaded.transition().duration(200).style('opacity', 0).remove();
+	    modal.transition().duration(200).style('top', '0px');
+	    select(document).call(keybinding.unbind);
+	  };
 
+	  var modal = shaded.append('div').attr('class', 'modal fillL');
+	  modal.append('input').attr('class', 'keytrap keytrap-first').on('focus.keytrap', moveFocusToLast);
 
-	    function isLegitCrossing(tags1, featureType1, tags2, featureType2) {
+	  if (!blocking) {
+	    shaded.on('click.remove-modal', function (d3_event) {
+	      if (d3_event.target === _this) {
+	        shaded.close();
+	      }
+	    });
+	    modal.append('button').attr('class', 'close').on('click', shaded.close).call(svgIcon('#iD-icon-close'));
+	    keybinding.on('⌫', shaded.close).on('⎋', shaded.close);
+	    select(document).call(keybinding);
+	  }
 
-	        // assume 0 by default
-	        var level1 = tags1.level || '0';
-	        var level2 = tags2.level || '0';
+	  modal.append('div').attr('class', 'content');
+	  modal.append('input').attr('class', 'keytrap keytrap-last').on('focus.keytrap', moveFocusToFirst);
 
-	        if (taggedAsIndoor(tags1) && taggedAsIndoor(tags2) && level1 !== level2) {
-	            // assume features don't interact if they're indoor on different levels
-	            return true;
-	        }
+	  if (animate) {
+	    shaded.transition().style('opacity', 1);
+	  } else {
+	    shaded.style('opacity', 1);
+	  }
 
-	        // assume 0 by default; don't use way.layer() since we account for structures here
-	        var layer1 = tags1.layer || '0';
-	        var layer2 = tags2.layer || '0';
+	  return shaded;
 
-	        if (allowsBridge(featureType1) && allowsBridge(featureType2)) {
-	            if (hasTag(tags1, 'bridge') && !hasTag(tags2, 'bridge')) { return true; }
-	            if (!hasTag(tags1, 'bridge') && hasTag(tags2, 'bridge')) { return true; }
-	            // crossing bridges must use different layers
-	            if (hasTag(tags1, 'bridge') && hasTag(tags2, 'bridge') && layer1 !== layer2) { return true; }
-	        } else if (allowsBridge(featureType1) && hasTag(tags1, 'bridge')) { return true; }
-	        else if (allowsBridge(featureType2) && hasTag(tags2, 'bridge')) { return true; }
+	  function moveFocusToFirst() {
+	    var node = modal // there are additional rules about what's focusable, but this suits our purposes
+	    .select('a, button, input:not(.keytrap), select, textarea').node();
 
-	        if (allowsTunnel(featureType1) && allowsTunnel(featureType2)) {
-	            if (hasTag(tags1, 'tunnel') && !hasTag(tags2, 'tunnel')) { return true; }
-	            if (!hasTag(tags1, 'tunnel') && hasTag(tags2, 'tunnel')) { return true; }
-	            // crossing tunnels must use different layers
-	            if (hasTag(tags1, 'tunnel') && hasTag(tags2, 'tunnel') && layer1 !== layer2) { return true; }
-	        } else if (allowsTunnel(featureType1) && hasTag(tags1, 'tunnel')) { return true; }
-	        else if (allowsTunnel(featureType2) && hasTag(tags2, 'tunnel')) { return true; }
+	    if (node) {
+	      node.focus();
+	    } else {
+	      select(this).node().blur();
+	    }
+	  }
 
-	        // don't flag crossing waterways and pier/highways
-	        if (featureType1 === 'waterway' && featureType2 === 'highway' && tags2.man_made === 'pier') { return true; }
-	        if (featureType2 === 'waterway' && featureType1 === 'highway' && tags1.man_made === 'pier') { return true; }
+	  function moveFocusToLast() {
+	    var nodes = modal.selectAll('a, button, input:not(.keytrap), select, textarea').nodes();
 
-	        if (featureType1 === 'building' || featureType2 === 'building') {
-	            // for building crossings, different layers are enough
-	            if (layer1 !== layer2) { return true; }
-	        }
-	        return false;
+	    if (nodes.length) {
+	      nodes[nodes.length - 1].focus();
+	    } else {
+	      select(this).node().blur();
 	    }
+	  }
+	}
 
+	function uiLoading(context) {
+	  var _modalSelection = select(null);
 
-	    // highway values for which we shouldn't recommend connecting to waterways
-	    var highwaysDisallowingFords = {
-	        motorway: true, motorway_link: true, trunk: true, trunk_link: true,
-	        primary: true, primary_link: true, secondary: true, secondary_link: true
-	    };
-	    var nonCrossingHighways = { track: true };
-
-	    function tagsForConnectionNodeIfAllowed(entity1, entity2, graph) {
-	        var featureType1 = getFeatureType(entity1, graph);
-	        var featureType2 = getFeatureType(entity2, graph);
-
-	        var geometry1 = entity1.geometry(graph);
-	        var geometry2 = entity2.geometry(graph);
-	        var bothLines = geometry1 === 'line' && geometry2 === 'line';
-
-	        if (featureType1 === featureType2) {
-	            if (featureType1 === 'highway') {
-	                var entity1IsPath = osmPathHighwayTagValues[entity1.tags.highway];
-	                var entity2IsPath = osmPathHighwayTagValues[entity2.tags.highway];
-	                if ((entity1IsPath || entity2IsPath) && entity1IsPath !== entity2IsPath) {
-	                    // one feature is a path but not both
-
-	                    var roadFeature = entity1IsPath ? entity2 : entity1;
-	                    if (nonCrossingHighways[roadFeature.tags.highway]) {
-	                        // don't mark path connections with certain roads as crossings
-	                        return {};
-	                    }
-	                    var pathFeature = entity1IsPath ? entity1 : entity2;
-	                    if (['marked', 'unmarked'].indexOf(pathFeature.tags.crossing) !== -1) {
-	                        // if the path is a crossing, match the crossing type
-	                        return bothLines ? { highway: 'crossing', crossing: pathFeature.tags.crossing } : {};
-	                    }
-	                    // don't add a `crossing` subtag to ambiguous crossings
-	                    return bothLines ? { highway: 'crossing' } : {};
-	                }
-	                return {};
-	            }
-	            if (featureType1 === 'waterway') { return {}; }
-	            if (featureType1 === 'railway') { return {}; }
+	  var _message = '';
+	  var _blocking = false;
 
-	        } else {
-	            var featureTypes = [featureType1, featureType2];
-	            if (featureTypes.indexOf('highway') !== -1) {
-	                if (featureTypes.indexOf('railway') !== -1) {
-	                    if (!bothLines) { return {}; }
+	  var loading = function loading(selection) {
+	    _modalSelection = uiModal(selection, _blocking);
 
-	                    var isTram = entity1.tags.railway === 'tram' || entity2.tags.railway === 'tram';
+	    var loadertext = _modalSelection.select('.content').classed('loading-modal', true).append('div').attr('class', 'modal-section fillL');
 
-	                    if (osmPathHighwayTagValues[entity1.tags.highway] ||
-	                        osmPathHighwayTagValues[entity2.tags.highway]) {
+	    loadertext.append('img').attr('class', 'loader').attr('src', context.imagePath('loader-white.gif'));
+	    loadertext.append('h3').html(_message);
 
-	                        // path-tram connections use this tag
-	                        if (isTram) { return { railway: 'tram_crossing' }; }
+	    _modalSelection.select('button.close').attr('class', 'hide');
 
-	                        // other path-rail connections use this tag
-	                        return { railway: 'crossing' };
-	                    } else {
-	                        // path-tram connections use this tag
-	                        if (isTram) { return { railway: 'tram_level_crossing' }; }
+	    return loading;
+	  };
 
-	                        // other road-rail connections use this tag
-	                        return { railway: 'level_crossing' };
-	                    }
-	                }
+	  loading.message = function (val) {
+	    if (!arguments.length) return _message;
+	    _message = val;
+	    return loading;
+	  };
 
-	                if (featureTypes.indexOf('waterway') !== -1) {
-	                    // do not allow fords on structures
-	                    if (hasTag(entity1.tags, 'tunnel') && hasTag(entity2.tags, 'tunnel')) { return null; }
-	                    if (hasTag(entity1.tags, 'bridge') && hasTag(entity2.tags, 'bridge')) { return null; }
+	  loading.blocking = function (val) {
+	    if (!arguments.length) return _blocking;
+	    _blocking = val;
+	    return loading;
+	  };
 
-	                    if (highwaysDisallowingFords[entity1.tags.highway] ||
-	                        highwaysDisallowingFords[entity2.tags.highway]) {
-	                        // do not allow fords on major highways
-	                        return null;
-	                    }
-	                    return bothLines ? { ford: 'yes' } : {};
-	                }
-	            }
-	        }
-	        return null;
-	    }
+	  loading.close = function () {
+	    _modalSelection.remove();
+	  };
 
+	  loading.isShown = function () {
+	    return _modalSelection && !_modalSelection.empty() && _modalSelection.node().parentNode;
+	  };
 
-	    function findCrossingsByWay(way1, graph, tree) {
-	        var edgeCrossInfos = [];
-	        if (way1.type !== 'way') { return edgeCrossInfos; }
-
-	        var taggedFeature1 = getFeatureWithFeatureTypeTagsForWay(way1, graph);
-	        var way1FeatureType = getFeatureType(taggedFeature1, graph);
-	        if (way1FeatureType === null) { return edgeCrossInfos; }
-
-	        var checkedSingleCrossingWays = {};
-
-	        // declare vars ahead of time to reduce garbage collection
-	        var i, j;
-	        var extent;
-	        var n1, n2, nA, nB, nAId, nBId;
-	        var segment1, segment2;
-	        var oneOnly;
-	        var segmentInfos, segment2Info, way2, taggedFeature2, way2FeatureType;
-	        var way1Nodes = graph.childNodes(way1);
-	        var comparedWays = {};
-	        for (i = 0; i < way1Nodes.length - 1; i++) {
-	            n1 = way1Nodes[i];
-	            n2 = way1Nodes[i + 1];
-	            extent = geoExtent([
-	                [
-	                    Math.min(n1.loc[0], n2.loc[0]),
-	                    Math.min(n1.loc[1], n2.loc[1])
-	                ],
-	                [
-	                    Math.max(n1.loc[0], n2.loc[0]),
-	                    Math.max(n1.loc[1], n2.loc[1])
-	                ]
-	            ]);
-
-	            // Optimize by only checking overlapping segments, not every segment
-	            // of overlapping ways
-	            segmentInfos = tree.waySegments(extent, graph);
-
-	            for (j = 0; j < segmentInfos.length; j++) {
-	                segment2Info = segmentInfos[j];
-
-	                // don't check for self-intersection in this validation
-	                if (segment2Info.wayId === way1.id) { continue; }
-
-	                // skip if this way was already checked and only one issue is needed
-	                if (checkedSingleCrossingWays[segment2Info.wayId]) { continue; }
-
-	                // mark this way as checked even if there are no crossings
-	                comparedWays[segment2Info.wayId] = true;
-
-	                way2 = graph.hasEntity(segment2Info.wayId);
-	                if (!way2) { continue; }
-	                taggedFeature2 = getFeatureWithFeatureTypeTagsForWay(way2, graph);
-	                // only check crossing highway, waterway, building, and railway
-	                way2FeatureType = getFeatureType(taggedFeature2, graph);
-
-	                if (way2FeatureType === null ||
-	                    isLegitCrossing(taggedFeature1.tags, way1FeatureType, taggedFeature2.tags, way2FeatureType)) {
-	                    continue;
-	                }
+	  return loading;
+	}
 
-	                // create only one issue for building crossings
-	                oneOnly = way1FeatureType === 'building' || way2FeatureType === 'building';
+	function coreHistory(context) {
+	  var dispatch = dispatch$8('reset', 'change', 'merge', 'restore', 'undone', 'redone', 'storage_error');
 
-	                nAId = segment2Info.nodes[0];
-	                nBId = segment2Info.nodes[1];
-	                if (nAId === n1.id || nAId === n2.id ||
-	                    nBId === n1.id || nBId === n2.id) {
-	                    // n1 or n2 is a connection node; skip
-	                    continue;
-	                }
-	                nA = graph.hasEntity(nAId);
-	                if (!nA) { continue; }
-	                nB = graph.hasEntity(nBId);
-	                if (!nB) { continue; }
-
-	                segment1 = [n1.loc, n2.loc];
-	                segment2 = [nA.loc, nB.loc];
-	                var point = geoLineIntersection(segment1, segment2);
-	                if (point) {
-	                    edgeCrossInfos.push({
-	                        wayInfos: [
-	                            {
-	                                way: way1,
-	                                featureType: way1FeatureType,
-	                                edge: [n1.id, n2.id]
-	                            },
-	                            {
-	                                way: way2,
-	                                featureType: way2FeatureType,
-	                                edge: [nA.id, nB.id]
-	                            }
-	                        ],
-	                        crossPoint: point
-	                    });
-	                    if (oneOnly) {
-	                        checkedSingleCrossingWays[way2.id] = true;
-	                        break;
-	                    }
-	                }
-	            }
-	        }
-	        return edgeCrossInfos;
-	    }
+	  var _lock = utilSessionMutex('lock'); // restorable if iD not open in another window/tab and a saved history exists in localStorage
 
 
-	    function waysToCheck(entity, graph) {
-	        var featureType = getFeatureType(entity, graph);
-	        if (!featureType) { return []; }
+	  var _hasUnresolvedRestorableChanges = _lock.lock() && !!corePreferences(getKey('saved_history'));
 
-	        if (entity.type === 'way') {
-	            return [entity];
-	        } else if (entity.type === 'relation') {
-	            return entity.members.reduce(function(array, member) {
-	                if (member.type === 'way' &&
-	                    // only look at geometry ways
-	                    (!member.role || member.role === 'outer' || member.role === 'inner')) {
-	                    var entity = graph.hasEntity(member.id);
-	                    // don't add duplicates
-	                    if (entity && array.indexOf(entity) === -1) {
-	                        array.push(entity);
-	                    }
-	                }
-	                return array;
-	            }, []);
-	        }
-	        return [];
-	    }
+	  var duration = 150;
+	  var _imageryUsed = [];
+	  var _photoOverlaysUsed = [];
+	  var _checkpoints = {};
 
+	  var _pausedGraph;
 
-	    var validation = function checkCrossingWays(entity, graph) {
+	  var _stack;
 
-	        var tree = context.history().tree();
+	  var _index;
 
-	        var ways = waysToCheck(entity, graph);
+	  var _tree; // internal _act, accepts list of actions and eased time
 
-	        var issues = [];
-	        // declare these here to reduce garbage collection
-	        var wayIndex, crossingIndex, crossings;
-	        for (wayIndex in ways) {
-	            crossings = findCrossingsByWay(ways[wayIndex], graph, tree);
-	            for (crossingIndex in crossings) {
-	                issues.push(createIssue(crossings[crossingIndex], graph));
-	            }
-	        }
-	        return issues;
-	    };
 
+	  function _act(actions, t) {
+	    actions = Array.prototype.slice.call(actions);
+	    var annotation;
 
-	    function createIssue(crossing, graph) {
+	    if (typeof actions[actions.length - 1] !== 'function') {
+	      annotation = actions.pop();
+	    }
 
-	        // use the entities with the tags that define the feature type
-	        crossing.wayInfos.sort(function(way1Info, way2Info) {
-	            var type1 = way1Info.featureType;
-	            var type2 = way2Info.featureType;
-	            if (type1 === type2) {
-	                return utilDisplayLabel(way1Info.way, graph) > utilDisplayLabel(way2Info.way, graph);
-	            } else if (type1 === 'waterway') {
-	                return true;
-	            } else if (type2 === 'waterway') {
-	                return false;
-	            }
-	            return type1 < type2;
-	        });
-	        var entities = crossing.wayInfos.map(function(wayInfo) {
-	            return getFeatureWithFeatureTypeTagsForWay(wayInfo.way, graph);
-	        });
-	        var edges = [crossing.wayInfos[0].edge, crossing.wayInfos[1].edge];
-	        var featureTypes = [crossing.wayInfos[0].featureType, crossing.wayInfos[1].featureType];
+	    var graph = _stack[_index].graph;
 
-	        var connectionTags = tagsForConnectionNodeIfAllowed(entities[0], entities[1], graph);
+	    for (var i = 0; i < actions.length; i++) {
+	      graph = actions[i](graph, t);
+	    }
 
-	        var featureType1 = crossing.wayInfos[0].featureType;
-	        var featureType2 = crossing.wayInfos[1].featureType;
+	    return {
+	      graph: graph,
+	      annotation: annotation,
+	      imageryUsed: _imageryUsed,
+	      photoOverlaysUsed: _photoOverlaysUsed,
+	      transform: context.projection.transform(),
+	      selectedIDs: context.selectedIDs()
+	    };
+	  } // internal _perform with eased time
 
-	        var isCrossingIndoors = taggedAsIndoor(entities[0].tags) && taggedAsIndoor(entities[1].tags);
-	        var isCrossingTunnels = allowsTunnel(featureType1) && hasTag(entities[0].tags, 'tunnel') &&
-	                                allowsTunnel(featureType2) && hasTag(entities[1].tags, 'tunnel');
-	        var isCrossingBridges = allowsBridge(featureType1) && hasTag(entities[0].tags, 'bridge') &&
-	                                allowsBridge(featureType2) && hasTag(entities[1].tags, 'bridge');
 
-	        var subtype = [featureType1, featureType2].sort().join('-');
+	  function _perform(args, t) {
+	    var previous = _stack[_index].graph;
+	    _stack = _stack.slice(0, _index + 1);
 
-	        var crossingTypeID = subtype;
+	    var actionResult = _act(args, t);
 
-	        if (isCrossingIndoors) {
-	            crossingTypeID = 'indoor-indoor';
-	        } else if (isCrossingTunnels) {
-	            crossingTypeID = 'tunnel-tunnel';
-	        } else if (isCrossingBridges) {
-	            crossingTypeID = 'bridge-bridge';
-	        }
-	        if (connectionTags && (isCrossingIndoors || isCrossingTunnels || isCrossingBridges)) {
-	            crossingTypeID += '_connectable';
-	        }
+	    _stack.push(actionResult);
 
-	        return new validationIssue({
-	            type: type,
-	            subtype: subtype,
-	            severity: 'warning',
-	            message: function(context) {
-	                var graph = context.graph();
-	                var entity1 = graph.hasEntity(this.entityIds[0]),
-	                    entity2 = graph.hasEntity(this.entityIds[1]);
-	                return (entity1 && entity2) ? _t('issues.crossing_ways.message', {
-	                    feature: utilDisplayLabel(entity1, graph),
-	                    feature2: utilDisplayLabel(entity2, graph)
-	                }) : '';
-	            },
-	            reference: showReference,
-	            entityIds: entities.map(function(entity) {
-	                return entity.id;
-	            }),
-	            data: {
-	                edges: edges,
-	                featureTypes: featureTypes,
-	                connectionTags: connectionTags
-	            },
-	            // differentiate based on the loc since two ways can cross multiple times
-	            hash: crossing.crossPoint.toString() +
-	                // if the edges change then so does the fix
-	                edges.slice().sort(function(edge1, edge2) {
-	                    // order to assure hash is deterministic
-	                    return edge1[0] < edge2[0] ? -1 : 1;
-	                }).toString() +
-	                // ensure the correct connection tags are added in the fix
-	                JSON.stringify(connectionTags),
-	            loc: crossing.crossPoint,
-	            dynamicFixes: function(context) {
-	                var mode = context.mode();
-	                if (!mode || mode.id !== 'select' || mode.selectedIDs().length !== 1) { return []; }
-
-	                var selectedIndex = this.entityIds[0] === mode.selectedIDs()[0] ? 0 : 1;
-	                var selectedFeatureType = this.data.featureTypes[selectedIndex];
-	                var otherFeatureType = this.data.featureTypes[selectedIndex === 0 ? 1 : 0];
-
-	                var fixes = [];
-
-	                if (connectionTags) {
-	                    fixes.push(makeConnectWaysFix(this.data.connectionTags));
-	                }
+	    _index++;
+	    return change(previous);
+	  } // internal _replace with eased time
 
-	                if (isCrossingIndoors) {
-	                    fixes.push(new validationIssueFix({
-	                        icon: 'iD-icon-layers',
-	                        title: _t('issues.fix.use_different_levels.title')
-	                    }));
-	                } else if (isCrossingTunnels ||
-	                    isCrossingBridges ||
-	                    featureType1 === 'building' ||
-	                    featureType2 === 'building')  {
-
-	                    fixes.push(makeChangeLayerFix('higher'));
-	                    fixes.push(makeChangeLayerFix('lower'));
-
-	                // can only add bridge/tunnel if both features are lines
-	                } else if (context.graph().geometry(this.entityIds[0]) === 'line' &&
-	                    context.graph().geometry(this.entityIds[1]) === 'line') {
-
-	                    // don't recommend adding bridges to waterways since they're uncommon
-	                    if (allowsBridge(selectedFeatureType) && selectedFeatureType !== 'waterway') {
-	                        fixes.push(makeAddBridgeOrTunnelFix('add_a_bridge', 'temaki-bridge', 'bridge'));
-	                    }
 
-	                    // don't recommend adding tunnels under waterways since they're uncommon
-	                    var skipTunnelFix = otherFeatureType === 'waterway' && selectedFeatureType !== 'waterway';
-	                    if (allowsTunnel(selectedFeatureType) && !skipTunnelFix) {
-	                        fixes.push(makeAddBridgeOrTunnelFix('add_a_tunnel', 'temaki-tunnel', 'tunnel'));
-	                    }
-	                }
+	  function _replace(args, t) {
+	    var previous = _stack[_index].graph; // assert(_index == _stack.length - 1)
 
-	                // repositioning the features is always an option
-	                fixes.push(new validationIssueFix({
-	                    icon: 'iD-operation-move',
-	                    title: _t('issues.fix.reposition_features.title')
-	                }));
+	    var actionResult = _act(args, t);
 
-	                return fixes;
-	            }
-	        });
+	    _stack[_index] = actionResult;
+	    return change(previous);
+	  } // internal _overwrite with eased time
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.crossing_ways.' + crossingTypeID + '.reference'));
-	        }
-	    }
 
-	    function makeAddBridgeOrTunnelFix(fixTitleID, iconName, bridgeOrTunnel){
-	        return new validationIssueFix({
-	            icon: iconName,
-	            title: _t('issues.fix.' + fixTitleID + '.title'),
-	            onClick: function(context) {
-	                var mode = context.mode();
-	                if (!mode || mode.id !== 'select') { return; }
+	  function _overwrite(args, t) {
+	    var previous = _stack[_index].graph;
 
-	                var selectedIDs = mode.selectedIDs();
-	                if (selectedIDs.length !== 1) { return; }
+	    if (_index > 0) {
+	      _index--;
 
-	                var selectedWayID = selectedIDs[0];
-	                if (!context.hasEntity(selectedWayID)) { return; }
+	      _stack.pop();
+	    }
 
-	                var resultWayIDs = [selectedWayID];
+	    _stack = _stack.slice(0, _index + 1);
 
-	                var edge, crossedEdge, crossedWayID;
-	                if (this.issue.entityIds[0] === selectedWayID) {
-	                    edge = this.issue.data.edges[0];
-	                    crossedEdge = this.issue.data.edges[1];
-	                    crossedWayID = this.issue.entityIds[1];
-	                } else {
-	                    edge = this.issue.data.edges[1];
-	                    crossedEdge = this.issue.data.edges[0];
-	                    crossedWayID = this.issue.entityIds[0];
-	                }
+	    var actionResult = _act(args, t);
 
-	                var crossingLoc = this.issue.loc;
+	    _stack.push(actionResult);
 
-	                var projection = context.projection;
+	    _index++;
+	    return change(previous);
+	  } // determine difference and dispatch a change event
 
-	                var action = function actionAddStructure(graph) {
 
-	                    var edgeNodes = [graph.entity(edge[0]), graph.entity(edge[1])];
+	  function change(previous) {
+	    var difference = coreDifference(previous, history.graph());
 
-	                    var crossedWay = graph.hasEntity(crossedWayID);
-	                    // use the explicit width of the crossed feature as the structure length, if available
-	                    var structLengthMeters = crossedWay && crossedWay.tags.width && parseFloat(crossedWay.tags.width);
-	                    if (!structLengthMeters) {
-	                        // if no explicit width is set, approximate the width based on the tags
-	                        structLengthMeters = crossedWay && crossedWay.impliedLineWidthMeters();
-	                    }
-	                    if (structLengthMeters) {
-	                        if (getFeatureType(crossedWay, graph) === 'railway') {
-	                            // bridges over railways are generally much longer than the rail bed itself, compensate
-	                            structLengthMeters *= 2;
-	                        }
-	                    } else {
-	                        // should ideally never land here since all rail/water/road tags should have an implied width
-	                        structLengthMeters = 8;
-	                    }
+	    if (!_pausedGraph) {
+	      dispatch.call('change', this, difference);
+	    }
 
-	                    var a1 = geoAngle(edgeNodes[0], edgeNodes[1], projection) + Math.PI;
-	                    var a2 = geoAngle(graph.entity(crossedEdge[0]), graph.entity(crossedEdge[1]), projection) + Math.PI;
-	                    var crossingAngle = Math.max(a1, a2) - Math.min(a1, a2);
-	                    if (crossingAngle > Math.PI) { crossingAngle -= Math.PI; }
-	                    // lengthen the structure to account for the angle of the crossing
-	                    structLengthMeters = ((structLengthMeters / 2) / Math.sin(crossingAngle)) * 2;
+	    return difference;
+	  } // iD uses namespaced keys so multiple installations do not conflict
 
-	                    // add padding since the structure must extend past the edges of the crossed feature
-	                    structLengthMeters += 4;
 
-	                    // clamp the length to a reasonable range
-	                    structLengthMeters = Math.min(Math.max(structLengthMeters, 4), 50);
+	  function getKey(n) {
+	    return 'iD_' + window.location.origin + '_' + n;
+	  }
 
-	                    function geomToProj(geoPoint) {
-	                        return [
-	                            geoLonToMeters(geoPoint[0], geoPoint[1]),
-	                            geoLatToMeters(geoPoint[1])
-	                        ];
-	                    }
-	                    function projToGeom(projPoint) {
-	                        var lat = geoMetersToLat(projPoint[1]);
-	                        return [
-	                            geoMetersToLon(projPoint[0], lat),
-	                            lat
-	                        ];
-	                    }
+	  var history = {
+	    graph: function graph() {
+	      return _stack[_index].graph;
+	    },
+	    tree: function tree() {
+	      return _tree;
+	    },
+	    base: function base() {
+	      return _stack[0].graph;
+	    },
+	    merge: function merge(entities
+	    /*, extent*/
+	    ) {
+	      var stack = _stack.map(function (state) {
+	        return state.graph;
+	      });
 
-	                    var projEdgeNode1 = geomToProj(edgeNodes[0].loc);
-	                    var projEdgeNode2 = geomToProj(edgeNodes[1].loc);
+	      _stack[0].graph.rebase(entities, stack, false);
 
-	                    var projectedAngle = geoVecAngle(projEdgeNode1, projEdgeNode2);
+	      _tree.rebase(entities, false);
 
-	                    var projectedCrossingLoc = geomToProj(crossingLoc);
-	                    var linearToSphericalMetersRatio = geoVecLength(projEdgeNode1, projEdgeNode2) /
-	                        geoSphericalDistance(edgeNodes[0].loc, edgeNodes[1].loc);
+	      dispatch.call('merge', this, entities);
+	    },
+	    perform: function perform() {
+	      // complete any transition already in progress
+	      select(document).interrupt('history.perform');
+	      var transitionable = false;
+	      var action0 = arguments[0];
 
-	                    function locSphericalDistanceFromCrossingLoc(angle, distanceMeters) {
-	                        var lengthSphericalMeters = distanceMeters * linearToSphericalMetersRatio;
-	                        return projToGeom([
-	                            projectedCrossingLoc[0] + Math.cos(angle) * lengthSphericalMeters,
-	                            projectedCrossingLoc[1] + Math.sin(angle) * lengthSphericalMeters
-	                        ]);
-	                    }
+	      if (arguments.length === 1 || arguments.length === 2 && typeof arguments[1] !== 'function') {
+	        transitionable = !!action0.transitionable;
+	      }
 
-	                    var endpointLocGetter1 = function(lengthMeters) {
-	                        return locSphericalDistanceFromCrossingLoc(projectedAngle, lengthMeters);
-	                    };
-	                    var endpointLocGetter2 = function(lengthMeters) {
-	                        return locSphericalDistanceFromCrossingLoc(projectedAngle + Math.PI, lengthMeters);
-	                    };
-
-	                    // avoid creating very short edges from splitting too close to another node
-	                    var minEdgeLengthMeters = 0.55;
-
-	                    // decide where to bound the structure along the way, splitting as necessary
-	                    function determineEndpoint(edge, endNode, locGetter) {
-	                        var newNode;
-
-	                        var idealLengthMeters = structLengthMeters / 2;
-
-	                        // distance between the crossing location and the end of the edge,
-	                        // the maximum length of this side of the structure
-	                        var crossingToEdgeEndDistance = geoSphericalDistance(crossingLoc, endNode.loc);
-
-	                        if (crossingToEdgeEndDistance - idealLengthMeters > minEdgeLengthMeters) {
-	                            // the edge is long enough to insert a new node
-
-	                            // the loc that would result in the full expected length
-	                            var idealNodeLoc = locGetter(idealLengthMeters);
-
-	                            newNode = osmNode();
-	                            graph = actionAddMidpoint({ loc: idealNodeLoc, edge: edge }, newNode)(graph);
-
-	                        } else {
-	                            var edgeCount = 0;
-	                            endNode.parentIntersectionWays(graph).forEach(function(way) {
-	                                way.nodes.forEach(function(nodeID) {
-	                                    if (nodeID === endNode.id) {
-	                                        if ((endNode.id === way.first() && endNode.id !== way.last()) ||
-	                                            (endNode.id === way.last() && endNode.id !== way.first())) {
-	                                            edgeCount += 1;
-	                                        } else {
-	                                            edgeCount += 2;
-	                                        }
-	                                    }
-	                                });
-	                            });
-
-	                            if (edgeCount >= 3) {
-	                                // the end node is a junction, try to leave a segment
-	                                // between it and the structure - #7202
-
-	                                var insetLength = crossingToEdgeEndDistance - minEdgeLengthMeters;
-	                                if (insetLength > minEdgeLengthMeters) {
-	                                    var insetNodeLoc = locGetter(insetLength);
-	                                    newNode = osmNode();
-	                                    graph = actionAddMidpoint({ loc: insetNodeLoc, edge: edge }, newNode)(graph);
-	                                }
-	                            }
-	                        }
-
-	                        // if the edge is too short to subdivide as desired, then
-	                        // just bound the structure at the existing end node
-	                        if (!newNode) { newNode = endNode; }
-
-	                        var splitAction = actionSplit(newNode.id)
-	                            .limitWays(resultWayIDs); // only split selected or created ways
-
-	                        // do the split
-	                        graph = splitAction(graph);
-	                        if (splitAction.getCreatedWayIDs().length) {
-	                            resultWayIDs.push(splitAction.getCreatedWayIDs()[0]);
-	                        }
-
-	                        return newNode;
-	                    }
+	      if (transitionable) {
+	        var origArguments = arguments;
+	        select(document).transition('history.perform').duration(duration).ease(linear$1).tween('history.tween', function () {
+	          return function (t) {
+	            if (t < 1) _overwrite([action0], t);
+	          };
+	        }).on('start', function () {
+	          _perform([action0], 0);
+	        }).on('end interrupt', function () {
+	          _overwrite(origArguments, 1);
+	        });
+	      } else {
+	        return _perform(arguments);
+	      }
+	    },
+	    replace: function replace() {
+	      select(document).interrupt('history.perform');
+	      return _replace(arguments, 1);
+	    },
+	    // Same as calling pop and then perform
+	    overwrite: function overwrite() {
+	      select(document).interrupt('history.perform');
+	      return _overwrite(arguments, 1);
+	    },
+	    pop: function pop(n) {
+	      select(document).interrupt('history.perform');
+	      var previous = _stack[_index].graph;
 
-	                    var structEndNode1 = determineEndpoint(edge, edgeNodes[1], endpointLocGetter1);
-	                    var structEndNode2 = determineEndpoint([edgeNodes[0].id, structEndNode1.id], edgeNodes[0], endpointLocGetter2);
+	      if (isNaN(+n) || +n < 0) {
+	        n = 1;
+	      }
 
-	                    var structureWay = resultWayIDs.map(function(id) {
-	                        return graph.entity(id);
-	                    }).find(function(way) {
-	                        return way.nodes.indexOf(structEndNode1.id) !== -1 &&
-	                            way.nodes.indexOf(structEndNode2.id) !== -1;
-	                    });
+	      while (n-- > 0 && _index > 0) {
+	        _index--;
 
-	                    var tags = Object.assign({}, structureWay.tags); // copy tags
-	                    if (bridgeOrTunnel === 'bridge'){
-	                        tags.bridge = 'yes';
-	                        tags.layer = '1';
-	                    } else {
-	                        var tunnelValue = 'yes';
-	                        if (getFeatureType(structureWay, graph) === 'waterway') {
-	                            // use `tunnel=culvert` for waterways by default
-	                            tunnelValue = 'culvert';
-	                        }
-	                        tags.tunnel = tunnelValue;
-	                        tags.layer = '-1';
-	                    }
-	                    // apply the structure tags to the way
-	                    graph = actionChangeTags(structureWay.id, tags)(graph);
-	                    return graph;
-	                };
+	        _stack.pop();
+	      }
 
-	                context.perform(action, _t('issues.fix.' + fixTitleID + '.annotation'));
-	                context.enter(modeSelect(context, resultWayIDs));
-	            }
-	        });
-	    }
+	      return change(previous);
+	    },
+	    // Back to the previous annotated state or _index = 0.
+	    undo: function undo() {
+	      select(document).interrupt('history.perform');
+	      var previousStack = _stack[_index];
+	      var previous = previousStack.graph;
+
+	      while (_index > 0) {
+	        _index--;
+	        if (_stack[_index].annotation) break;
+	      }
 
-	    function makeConnectWaysFix(connectionTags) {
+	      dispatch.call('undone', this, _stack[_index], previousStack);
+	      return change(previous);
+	    },
+	    // Forward to the next annotated state.
+	    redo: function redo() {
+	      select(document).interrupt('history.perform');
+	      var previousStack = _stack[_index];
+	      var previous = previousStack.graph;
+	      var tryIndex = _index;
+
+	      while (tryIndex < _stack.length - 1) {
+	        tryIndex++;
 
-	        var fixTitleID = 'connect_features';
-	        if (connectionTags.ford) {
-	            fixTitleID = 'connect_using_ford';
+	        if (_stack[tryIndex].annotation) {
+	          _index = tryIndex;
+	          dispatch.call('redone', this, _stack[_index], previousStack);
+	          break;
 	        }
+	      }
 
-	        return new validationIssueFix({
-	            icon: 'iD-icon-crossing',
-	            title: _t('issues.fix.' + fixTitleID + '.title'),
-	            onClick: function(context) {
-	                var loc = this.issue.loc;
-	                var connectionTags = this.issue.data.connectionTags;
-	                var edges = this.issue.data.edges;
+	      return change(previous);
+	    },
+	    pauseChangeDispatch: function pauseChangeDispatch() {
+	      if (!_pausedGraph) {
+	        _pausedGraph = _stack[_index].graph;
+	      }
+	    },
+	    resumeChangeDispatch: function resumeChangeDispatch() {
+	      if (_pausedGraph) {
+	        var previous = _pausedGraph;
+	        _pausedGraph = null;
+	        return change(previous);
+	      }
+	    },
+	    undoAnnotation: function undoAnnotation() {
+	      var i = _index;
 
-	                context.perform(
-	                    function actionConnectCrossingWays(graph) {
-	                        // create the new node for the points
-	                        var node = osmNode({ loc: loc, tags: connectionTags });
-	                        graph = graph.replace(node);
-
-	                        var nodesToMerge = [node.id];
-	                        var mergeThresholdInMeters = 0.75;
-
-	                        edges.forEach(function(edge) {
-	                            var edgeNodes = [graph.entity(edge[0]), graph.entity(edge[1])];
-	                            var closestNodeInfo = geoSphericalClosestNode(edgeNodes, loc);
-	                            // if there is already a point nearby, use that
-	                            if (closestNodeInfo.distance < mergeThresholdInMeters) {
-	                                nodesToMerge.push(closestNodeInfo.node.id);
-	                            // else add the new node to the way
-	                            } else {
-	                                graph = actionAddMidpoint({loc: loc, edge: edge}, node)(graph);
-	                            }
-	                        });
-
-	                        if (nodesToMerge.length > 1) {
-	                            // if we're using nearby nodes, merge them with the new node
-	                            graph = actionMergeNodes(nodesToMerge, loc)(graph);
-	                        }
-
-	                        return graph;
-	                    },
-	                    _t('issues.fix.connect_crossing_features.annotation')
-	                );
+	      while (i >= 0) {
+	        if (_stack[i].annotation) return _stack[i].annotation;
+	        i--;
+	      }
+	    },
+	    redoAnnotation: function redoAnnotation() {
+	      var i = _index + 1;
+
+	      while (i <= _stack.length - 1) {
+	        if (_stack[i].annotation) return _stack[i].annotation;
+	        i++;
+	      }
+	    },
+	    // Returns the entities from the active graph with bounding boxes
+	    // overlapping the given `extent`.
+	    intersects: function intersects(extent) {
+	      return _tree.intersects(extent, _stack[_index].graph);
+	    },
+	    difference: function difference() {
+	      var base = _stack[0].graph;
+	      var head = _stack[_index].graph;
+	      return coreDifference(base, head);
+	    },
+	    changes: function changes(action) {
+	      var base = _stack[0].graph;
+	      var head = _stack[_index].graph;
+
+	      if (action) {
+	        head = action(head);
+	      }
+
+	      var difference = coreDifference(base, head);
+	      return {
+	        modified: difference.modified(),
+	        created: difference.created(),
+	        deleted: difference.deleted()
+	      };
+	    },
+	    hasChanges: function hasChanges() {
+	      return this.difference().length() > 0;
+	    },
+	    imageryUsed: function imageryUsed(sources) {
+	      if (sources) {
+	        _imageryUsed = sources;
+	        return history;
+	      } else {
+	        var s = new Set();
+
+	        _stack.slice(1, _index + 1).forEach(function (state) {
+	          state.imageryUsed.forEach(function (source) {
+	            if (source !== 'Custom') {
+	              s.add(source);
 	            }
+	          });
 	        });
-	    }
 
-	    function makeChangeLayerFix(higherOrLower) {
-	        return new validationIssueFix({
-	            icon: 'iD-icon-' + (higherOrLower === 'higher' ? 'up' : 'down'),
-	            title: _t('issues.fix.tag_this_as_' + higherOrLower + '.title'),
-	            onClick: function(context) {
+	        return Array.from(s);
+	      }
+	    },
+	    photoOverlaysUsed: function photoOverlaysUsed(sources) {
+	      if (sources) {
+	        _photoOverlaysUsed = sources;
+	        return history;
+	      } else {
+	        var s = new Set();
 
-	                var mode = context.mode();
-	                if (!mode || mode.id !== 'select') { return; }
+	        _stack.slice(1, _index + 1).forEach(function (state) {
+	          if (state.photoOverlaysUsed && Array.isArray(state.photoOverlaysUsed)) {
+	            state.photoOverlaysUsed.forEach(function (photoOverlay) {
+	              s.add(photoOverlay);
+	            });
+	          }
+	        });
 
-	                var selectedIDs = mode.selectedIDs();
-	                if (selectedIDs.length !== 1) { return; }
+	        return Array.from(s);
+	      }
+	    },
+	    // save the current history state
+	    checkpoint: function checkpoint(key) {
+	      _checkpoints[key] = {
+	        stack: _stack,
+	        index: _index
+	      };
+	      return history;
+	    },
+	    // restore history state to a given checkpoint or reset completely
+	    reset: function reset(key) {
+	      if (key !== undefined && _checkpoints.hasOwnProperty(key)) {
+	        _stack = _checkpoints[key].stack;
+	        _index = _checkpoints[key].index;
+	      } else {
+	        _stack = [{
+	          graph: coreGraph()
+	        }];
+	        _index = 0;
+	        _tree = coreTree(_stack[0].graph);
+	        _checkpoints = {};
+	      }
 
-	                var selectedID = selectedIDs[0];
-	                if (!this.issue.entityIds.some(function(entityId) {
-	                    return entityId === selectedID;
-	                })) { return; }
+	      dispatch.call('reset');
+	      dispatch.call('change');
+	      return history;
+	    },
+	    // `toIntroGraph()` is used to export the intro graph used by the walkthrough.
+	    //
+	    // To use it:
+	    //  1. Start the walkthrough.
+	    //  2. Get to a "free editing" tutorial step
+	    //  3. Make your edits to the walkthrough map
+	    //  4. In your browser dev console run:
+	    //        `id.history().toIntroGraph()`
+	    //  5. This outputs stringified JSON to the browser console
+	    //  6. Copy it to `data/intro_graph.json` and prettify it in your code editor
+	    toIntroGraph: function toIntroGraph() {
+	      var nextID = {
+	        n: 0,
+	        r: 0,
+	        w: 0
+	      };
+	      var permIDs = {};
+	      var graph = this.graph();
+	      var baseEntities = {}; // clone base entities..
 
-	                var entity = context.hasEntity(selectedID);
-	                if (!entity) { return; }
+	      Object.values(graph.base().entities).forEach(function (entity) {
+	        var copy = copyIntroEntity(entity);
+	        baseEntities[copy.id] = copy;
+	      }); // replace base entities with head entities..
 
-	                var tags = Object.assign({}, entity.tags);   // shallow copy
-	                var layer = tags.layer && Number(tags.layer);
-	                if (layer && !isNaN(layer)) {
-	                    if (higherOrLower === 'higher') {
-	                        layer += 1;
-	                    } else {
-	                        layer -= 1;
-	                    }
-	                } else {
-	                    if (higherOrLower === 'higher') {
-	                        layer = 1;
-	                    } else {
-	                        layer = -1;
-	                    }
-	                }
-	                tags.layer = layer.toString();
-	                context.perform(
-	                    actionChangeTags(entity.id, tags),
-	                    _t('operations.change_tags.annotation')
-	                );
-	            }
-	        });
-	    }
+	      Object.keys(graph.entities).forEach(function (id) {
+	        var entity = graph.entities[id];
 
-	    validation.type = type;
+	        if (entity) {
+	          var copy = copyIntroEntity(entity);
+	          baseEntities[copy.id] = copy;
+	        } else {
+	          delete baseEntities[id];
+	        }
+	      }); // swap temporary for permanent ids..
 
-	    return validation;
-	}
+	      Object.values(baseEntities).forEach(function (entity) {
+	        if (Array.isArray(entity.nodes)) {
+	          entity.nodes = entity.nodes.map(function (node) {
+	            return permIDs[node] || node;
+	          });
+	        }
 
-	function validationDisconnectedWay() {
-	    var type = 'disconnected_way';
+	        if (Array.isArray(entity.members)) {
+	          entity.members = entity.members.map(function (member) {
+	            member.id = permIDs[member.id] || member.id;
+	            return member;
+	          });
+	        }
+	      });
+	      return JSON.stringify({
+	        dataIntroGraph: baseEntities
+	      });
 
-	    function isTaggedAsHighway(entity) {
-	        return osmRoutableHighwayTagValues[entity.tags.highway];
-	    }
+	      function copyIntroEntity(source) {
+	        var copy = utilObjectOmit(source, ['type', 'user', 'v', 'version', 'visible']); // Note: the copy is no longer an osmEntity, so it might not have `tags`
 
-	    var validation = function checkDisconnectedWay(entity, graph) {
+	        if (copy.tags && !Object.keys(copy.tags)) {
+	          delete copy.tags;
+	        }
 
-	        var routingIslandWays = routingIslandForEntity(entity);
-	        if (!routingIslandWays) { return []; }
+	        if (Array.isArray(copy.loc)) {
+	          copy.loc[0] = +copy.loc[0].toFixed(6);
+	          copy.loc[1] = +copy.loc[1].toFixed(6);
+	        }
 
-	        return [new validationIssue({
-	            type: type,
-	            subtype: 'highway',
-	            severity: 'warning',
-	            message: function(context) {
-	                if (this.entityIds.length === 1) {
-	                    var entity = context.hasEntity(this.entityIds[0]);
-	                    return entity ? _t('issues.disconnected_way.highway.message', { highway: utilDisplayLabel(entity, context.graph()) }) : '';
-	                }
-	                return _t('issues.disconnected_way.routable.message.multiple', { count: this.entityIds.length.toString() });
-	            },
-	            reference: showReference,
-	            entityIds: Array.from(routingIslandWays).map(function(way) { return way.id; }),
-	            dynamicFixes: makeFixes
-	        })];
+	        var match = source.id.match(/([nrw])-\d*/); // temporary id
 
+	        if (match !== null) {
+	          var nrw = match[1];
+	          var permID;
 
-	        function makeFixes(context) {
+	          do {
+	            permID = nrw + ++nextID[nrw];
+	          } while (baseEntities.hasOwnProperty(permID));
 
-	            var fixes = [];
+	          copy.id = permIDs[source.id] = permID;
+	        }
 
-	            var singleEntity = this.entityIds.length === 1 && context.hasEntity(this.entityIds[0]);
+	        return copy;
+	      }
+	    },
+	    toJSON: function toJSON() {
+	      if (!this.hasChanges()) return;
+	      var allEntities = {};
+	      var baseEntities = {};
+	      var base = _stack[0];
+
+	      var s = _stack.map(function (i) {
+	        var modified = [];
+	        var deleted = [];
+	        Object.keys(i.graph.entities).forEach(function (id) {
+	          var entity = i.graph.entities[id];
+
+	          if (entity) {
+	            var key = osmEntity.key(entity);
+	            allEntities[key] = entity;
+	            modified.push(key);
+	          } else {
+	            deleted.push(id);
+	          } // make sure that the originals of changed or deleted entities get merged
+	          // into the base of the _stack after restoring the data from JSON.
 
-	            if (singleEntity) {
 
-	                if (singleEntity.type === 'way' && !singleEntity.isClosed()) {
+	          if (id in base.graph.entities) {
+	            baseEntities[id] = base.graph.entities[id];
+	          }
 
-	                    var textDirection = _mainLocalizer.textDirection();
+	          if (entity && entity.nodes) {
+	            // get originals of pre-existing child nodes
+	            entity.nodes.forEach(function (nodeID) {
+	              if (nodeID in base.graph.entities) {
+	                baseEntities[nodeID] = base.graph.entities[nodeID];
+	              }
+	            });
+	          } // get originals of parent entities too
 
-	                    var startFix = makeContinueDrawingFixIfAllowed(textDirection, singleEntity.first(), 'start');
-	                    if (startFix) { fixes.push(startFix); }
 
-	                    var endFix = makeContinueDrawingFixIfAllowed(textDirection, singleEntity.last(), 'end');
-	                    if (endFix) { fixes.push(endFix); }
-	                }
-	                if (!fixes.length) {
-	                    fixes.push(new validationIssueFix({
-	                        title: _t('issues.fix.connect_feature.title')
-	                    }));
-	                }
+	          var baseParents = base.graph._parentWays[id];
 
-	                fixes.push(new validationIssueFix({
-	                    icon: 'iD-operation-delete',
-	                    title: _t('issues.fix.delete_feature.title'),
-	                    entityIds: [singleEntity.id],
-	                    onClick: function(context) {
-	                        var id = this.issue.entityIds[0];
-	                        var operation = operationDelete(context, [id]);
-	                        if (!operation.disabled()) {
-	                            operation();
-	                        }
-	                    }
-	                }));
-	            } else {
-	                fixes.push(new validationIssueFix({
-	                    title: _t('issues.fix.connect_features.title')
-	                }));
-	            }
+	          if (baseParents) {
+	            baseParents.forEach(function (parentID) {
+	              if (parentID in base.graph.entities) {
+	                baseEntities[parentID] = base.graph.entities[parentID];
+	              }
+	            });
+	          }
+	        });
+	        var x = {};
+	        if (modified.length) x.modified = modified;
+	        if (deleted.length) x.deleted = deleted;
+	        if (i.imageryUsed) x.imageryUsed = i.imageryUsed;
+	        if (i.photoOverlaysUsed) x.photoOverlaysUsed = i.photoOverlaysUsed;
+	        if (i.annotation) x.annotation = i.annotation;
+	        if (i.transform) x.transform = i.transform;
+	        if (i.selectedIDs) x.selectedIDs = i.selectedIDs;
+	        return x;
+	      });
 
-	            return fixes;
-	        }
+	      return JSON.stringify({
+	        version: 3,
+	        entities: Object.values(allEntities),
+	        baseEntities: Object.values(baseEntities),
+	        stack: s,
+	        nextIDs: osmEntity.id.next,
+	        index: _index,
+	        // note the time the changes were saved
+	        timestamp: new Date().getTime()
+	      });
+	    },
+	    fromJSON: function fromJSON(json, loadChildNodes) {
+	      var h = JSON.parse(json);
+	      var loadComplete = true;
+	      osmEntity.id.next = h.nextIDs;
+	      _index = h.index;
 
+	      if (h.version === 2 || h.version === 3) {
+	        var allEntities = {};
+	        h.entities.forEach(function (entity) {
+	          allEntities[osmEntity.key(entity)] = osmEntity(entity);
+	        });
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.disconnected_way.routable.reference'));
-	        }
+	        if (h.version === 3) {
+	          // This merges originals for changed entities into the base of
+	          // the _stack even if the current _stack doesn't have them (for
+	          // example when iD has been restarted in a different region)
+	          var baseEntities = h.baseEntities.map(function (d) {
+	            return osmEntity(d);
+	          });
 
-	        function routingIslandForEntity(entity) {
+	          var stack = _stack.map(function (state) {
+	            return state.graph;
+	          });
 
-	            var routingIsland = new Set();  // the interconnected routable features
-	            var waysToCheck = [];           // the queue of remaining routable ways to traverse
+	          _stack[0].graph.rebase(baseEntities, stack, true);
 
-	            function queueParentWays(node) {
-	                graph.parentWays(node).forEach(function(parentWay) {
-	                    if (!routingIsland.has(parentWay) &&    // only check each feature once
-	                        isRoutableWay(parentWay, false)) {  // only check routable features
-	                        routingIsland.add(parentWay);
-	                        waysToCheck.push(parentWay);
-	                    }
-	                });
-	            }
+	          _tree.rebase(baseEntities, true); // When we restore a modified way, we also need to fetch any missing
+	          // childnodes that would normally have been downloaded with it.. #2142
 
-	            if (entity.type === 'way' && isRoutableWay(entity, true)) {
 
-	                routingIsland.add(entity);
-	                waysToCheck.push(entity);
+	          if (loadChildNodes) {
+	            var osm = context.connection();
+	            var baseWays = baseEntities.filter(function (e) {
+	              return e.type === 'way';
+	            });
+	            var nodeIDs = baseWays.reduce(function (acc, way) {
+	              return utilArrayUnion(acc, way.nodes);
+	            }, []);
+	            var missing = nodeIDs.filter(function (n) {
+	              return !_stack[0].graph.hasEntity(n);
+	            });
 
-	            } else if (entity.type === 'node' && isRoutableNode(entity)) {
+	            if (missing.length && osm) {
+	              loadComplete = false;
+	              context.map().redrawEnable(false);
+	              var loading = uiLoading(context).blocking(true);
+	              context.container().call(loading);
 
-	                routingIsland.add(entity);
-	                queueParentWays(entity);
+	              var childNodesLoaded = function childNodesLoaded(err, result) {
+	                if (!err) {
+	                  var visibleGroups = utilArrayGroupBy(result.data, 'visible');
+	                  var visibles = visibleGroups["true"] || []; // alive nodes
 
-	            } else {
-	                // this feature isn't routable, cannot be a routing island
-	                return null;
-	            }
+	                  var invisibles = visibleGroups["false"] || []; // deleted nodes
 
-	            while (waysToCheck.length) {
-	                var wayToCheck = waysToCheck.pop();
-	                var childNodes = graph.childNodes(wayToCheck);
-	                for (var i in childNodes) {
-	                    var vertex = childNodes[i];
+	                  if (visibles.length) {
+	                    var visibleIDs = visibles.map(function (entity) {
+	                      return entity.id;
+	                    });
 
-	                    if (isConnectedVertex(vertex)) {
-	                        // found a link to the wider network, not a routing island
-	                        return null;
-	                    }
+	                    var stack = _stack.map(function (state) {
+	                      return state.graph;
+	                    });
 
-	                    if (isRoutableNode(vertex)) {
-	                        routingIsland.add(vertex);
-	                    }
+	                    missing = utilArrayDifference(missing, visibleIDs);
 
-	                    queueParentWays(vertex);
-	                }
-	            }
+	                    _stack[0].graph.rebase(visibles, stack, true);
 
-	            // no network link found, this is a routing island, return its members
-	            return routingIsland;
-	        }
+	                    _tree.rebase(visibles, true);
+	                  } // fetch older versions of nodes that were deleted..
 
-	        function isConnectedVertex(vertex) {
-	            // assume ways overlapping unloaded tiles are connected to the wider road network  - #5938
-	            var osm = services.osm;
-	            if (osm && !osm.isDataLoaded(vertex.loc)) { return true; }
 
-	            // entrances are considered connected
-	            if (vertex.tags.entrance &&
-	                vertex.tags.entrance !== 'no') { return true; }
-	            if (vertex.tags.amenity === 'parking_entrance') { return true; }
+	                  invisibles.forEach(function (entity) {
+	                    osm.loadEntityVersion(entity.id, +entity.version - 1, childNodesLoaded);
+	                  });
+	                }
 
-	            return false;
-	        }
+	                if (err || !missing.length) {
+	                  loading.close();
+	                  context.map().redrawEnable(true);
+	                  dispatch.call('change');
+	                  dispatch.call('restore', this);
+	                }
+	              };
 
-	        function isRoutableNode(node) {
-	            // treat elevators as distinct features in the highway network
-	            if (node.tags.highway === 'elevator') { return true; }
-	            return false;
+	              osm.loadMultiple(missing, childNodesLoaded);
+	            }
+	          }
 	        }
 
-	        function isRoutableWay(way, ignoreInnerWays) {
-	            if (isTaggedAsHighway(way) || way.tags.route === 'ferry') { return true; }
+	        _stack = h.stack.map(function (d) {
+	          var entities = {},
+	              entity;
 
-	            return graph.parentRelations(way).some(function(parentRelation) {
-	                if (parentRelation.tags.type === 'route' &&
-	                    parentRelation.tags.route === 'ferry') { return true; }
+	          if (d.modified) {
+	            d.modified.forEach(function (key) {
+	              entity = allEntities[key];
+	              entities[entity.id] = entity;
+	            });
+	          }
 
-	                if (parentRelation.isMultipolygon() &&
-	                    isTaggedAsHighway(parentRelation) &&
-	                    (!ignoreInnerWays || parentRelation.memberById(way.id).role !== 'inner')) { return true; }
+	          if (d.deleted) {
+	            d.deleted.forEach(function (id) {
+	              entities[id] = undefined;
 	            });
-	        }
+	          }
 
-	        function makeContinueDrawingFixIfAllowed(textDirection, vertexID, whichEnd) {
-	            var vertex = graph.hasEntity(vertexID);
-	            if (!vertex || vertex.tags.noexit === 'yes') { return null; }
+	          return {
+	            graph: coreGraph(_stack[0].graph).load(entities),
+	            annotation: d.annotation,
+	            imageryUsed: d.imageryUsed,
+	            photoOverlaysUsed: d.photoOverlaysUsed,
+	            transform: d.transform,
+	            selectedIDs: d.selectedIDs
+	          };
+	        });
+	      } else {
+	        // original version
+	        _stack = h.stack.map(function (d) {
+	          var entities = {};
 
-	            var useLeftContinue = (whichEnd === 'start' && textDirection === 'ltr') ||
-	                (whichEnd === 'end' && textDirection === 'rtl');
+	          for (var i in d.entities) {
+	            var entity = d.entities[i];
+	            entities[i] = entity === 'undefined' ? undefined : osmEntity(entity);
+	          }
 
-	            return new validationIssueFix({
-	                icon: 'iD-operation-continue' + (useLeftContinue ? '-left' : ''),
-	                title: _t('issues.fix.continue_from_' + whichEnd + '.title'),
-	                entityIds: [vertexID],
-	                onClick: function(context) {
-	                    var wayId = this.issue.entityIds[0];
-	                    var way = context.hasEntity(wayId);
-	                    var vertexId = this.entityIds[0];
-	                    var vertex = context.hasEntity(vertexId);
+	          d.graph = coreGraph(_stack[0].graph).load(entities);
+	          return d;
+	        });
+	      }
 
-	                    if (!way || !vertex) { return; }
+	      var transform = _stack[_index].transform;
 
-	                    // make sure the vertex is actually visible and editable
-	                    var map = context.map();
-	                    if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
-	                        map.zoomToEase(vertex);
-	                    }
+	      if (transform) {
+	        context.map().transformEase(transform, 0); // 0 = immediate, no easing
+	      }
 
-	                    context.enter(
-	                        modeDrawLine(context, wayId, context.graph(), 'line', way.affix(vertexId), true)
-	                    );
-	                }
-	            });
-	        }
+	      if (loadComplete) {
+	        dispatch.call('change');
+	        dispatch.call('restore', this);
+	      }
 
-	    };
+	      return history;
+	    },
+	    lock: function lock() {
+	      return _lock.lock();
+	    },
+	    unlock: function unlock() {
+	      _lock.unlock();
+	    },
+	    save: function save() {
+	      if (_lock.locked() && // don't overwrite existing, unresolved changes
+	      !_hasUnresolvedRestorableChanges) {
+	        var success = corePreferences(getKey('saved_history'), history.toJSON() || null);
+	        if (!success) dispatch.call('storage_error');
+	      }
 
-	    validation.type = type;
+	      return history;
+	    },
+	    // delete the history version saved in localStorage
+	    clearSaved: function clearSaved() {
+	      context.debouncedSave.cancel();
+
+	      if (_lock.locked()) {
+	        _hasUnresolvedRestorableChanges = false;
+	        corePreferences(getKey('saved_history'), null); // clear the changeset metadata associated with the saved history
+
+	        corePreferences('comment', null);
+	        corePreferences('hashtags', null);
+	        corePreferences('source', null);
+	      }
 
-	    return validation;
+	      return history;
+	    },
+	    savedHistoryJSON: function savedHistoryJSON() {
+	      return corePreferences(getKey('saved_history'));
+	    },
+	    hasRestorableChanges: function hasRestorableChanges() {
+	      return _hasUnresolvedRestorableChanges;
+	    },
+	    // load history from a version stored in localStorage
+	    restore: function restore() {
+	      if (_lock.locked()) {
+	        _hasUnresolvedRestorableChanges = false;
+	        var json = this.savedHistoryJSON();
+	        if (json) history.fromJSON(json, true);
+	      }
+	    },
+	    _getKey: getKey
+	  };
+	  history.reset();
+	  return utilRebind(history, dispatch, 'on');
 	}
 
-	function validationFormatting() {
-	    var type = 'invalid_format';
+	/**
+	 * Look for roads that can be connected to other roads with a short extension
+	 */
 
-	    var validation = function(entity) {
-	        var issues = [];
+	function validationAlmostJunction(context) {
+	  var type = 'almost_junction';
+	  var EXTEND_TH_METERS = 5;
+	  var WELD_TH_METERS = 0.75; // Comes from considering bounding case of parallel ways
 
-	        function isValidEmail(email) {
-	            // Emails in OSM are going to be official so they should be pretty simple
-	            // Using negated lists to better support all possible unicode characters (#6494)
-	            var valid_email = /^[^\(\)\\,":;<>@\[\]]+@[^\(\)\\,":;<>@\[\]\.]+(?:\.[a-z0-9-]+)*$/i;
+	  var CLOSE_NODE_TH = EXTEND_TH_METERS - WELD_TH_METERS; // Comes from considering bounding case of perpendicular ways
 
-	            // An empty value is also acceptable
-	            return (!email || valid_email.test(email));
-	        }
-	        /*
-	        function isSchemePresent(url) {
-	            var valid_scheme = /^https?:\/\//i;
-	            return (!url || valid_scheme.test(url));
-	        }
-	        */
-	        function showReferenceEmail(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.invalid_format.email.reference'));
-	        }
-	        /*
-	        function showReferenceWebsite(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(t('issues.invalid_format.website.reference'));
-	        }
-
-	        if (entity.tags.website) {
-	            // Multiple websites are possible
-	            // If ever we support ES6, arrow functions make this nicer
-	            var websites = entity.tags.website
-	                .split(';')
-	                .map(function(s) { return s.trim(); })
-	                .filter(function(x) { return !isSchemePresent(x); });
-
-	            if (websites.length) {
-	                issues.push(new validationIssue({
-	                    type: type,
-	                    subtype: 'website',
-	                    severity: 'warning',
-	                    message: function(context) {
-	                        var entity = context.hasEntity(this.entityIds[0]);
-	                        return entity ? t('issues.invalid_format.website.message' + this.data,
-	                            { feature: utilDisplayLabel(entity, context.graph()), site: websites.join(', ') }) : '';
-	                    },
-	                    reference: showReferenceWebsite,
-	                    entityIds: [entity.id],
-	                    hash: websites.join(),
-	                    data: (websites.length > 1) ? '_multi' : ''
-	                }));
-	            }
-	        }
-	        */
-	        if (entity.tags.email) {
-	            // Multiple emails are possible
-	            var emails = entity.tags.email
-	                .split(';')
-	                .map(function(s) { return s.trim(); })
-	                .filter(function(x) { return !isValidEmail(x); });
-
-	            if (emails.length) {
-	                issues.push(new validationIssue({
-	                    type: type,
-	                    subtype: 'email',
-	                    severity: 'warning',
-	                    message: function(context) {
-	                        var entity = context.hasEntity(this.entityIds[0]);
-	                        return entity ? _t('issues.invalid_format.email.message' + this.data,
-	                            { feature: utilDisplayLabel(entity, context.graph()), email: emails.join(', ') }) : '';
-	                    },
-	                    reference: showReferenceEmail,
-	                    entityIds: [entity.id],
-	                    hash: emails.join(),
-	                    data: (emails.length > 1) ? '_multi' : ''
-	                }));
-	            }
-	        }
+	  var SIG_ANGLE_TH = Math.atan(WELD_TH_METERS / EXTEND_TH_METERS);
 
-	        return issues;
-	    };
+	  function isHighway(entity) {
+	    return entity.type === 'way' && osmRoutableHighwayTagValues[entity.tags.highway];
+	  }
+
+	  function isTaggedAsNotContinuing(node) {
+	    return node.tags.noexit === 'yes' || node.tags.amenity === 'parking_entrance' || node.tags.entrance && node.tags.entrance !== 'no';
+	  }
+
+	  var validation = function checkAlmostJunction(entity, graph) {
+	    if (!isHighway(entity)) return [];
+	    if (entity.isDegenerate()) return [];
+	    var tree = context.history().tree();
+	    var extendableNodeInfos = findConnectableEndNodesByExtension(entity);
+	    var issues = [];
+	    extendableNodeInfos.forEach(function (extendableNodeInfo) {
+	      issues.push(new validationIssue({
+	        type: type,
+	        subtype: 'highway-highway',
+	        severity: 'warning',
+	        message: function message(context) {
+	          var entity1 = context.hasEntity(this.entityIds[0]);
 
-	    validation.type = type;
+	          if (this.entityIds[0] === this.entityIds[2]) {
+	            return entity1 ? _t.html('issues.almost_junction.self.message', {
+	              feature: utilDisplayLabel(entity1, context.graph())
+	            }) : '';
+	          } else {
+	            var entity2 = context.hasEntity(this.entityIds[2]);
+	            return entity1 && entity2 ? _t.html('issues.almost_junction.message', {
+	              feature: utilDisplayLabel(entity1, context.graph()),
+	              feature2: utilDisplayLabel(entity2, context.graph())
+	            }) : '';
+	          }
+	        },
+	        reference: showReference,
+	        entityIds: [entity.id, extendableNodeInfo.node.id, extendableNodeInfo.wid],
+	        loc: extendableNodeInfo.node.loc,
+	        hash: JSON.stringify(extendableNodeInfo.node.loc),
+	        data: {
+	          midId: extendableNodeInfo.mid.id,
+	          edge: extendableNodeInfo.edge,
+	          cross_loc: extendableNodeInfo.cross_loc
+	        },
+	        dynamicFixes: makeFixes
+	      }));
+	    });
+	    return issues;
 
-	    return validation;
-	}
+	    function makeFixes(context) {
+	      var fixes = [new validationIssueFix({
+	        icon: 'iD-icon-abutment',
+	        title: _t.html('issues.fix.connect_features.title'),
+	        onClick: function onClick(context) {
+	          var annotation = _t('issues.fix.connect_almost_junction.annotation');
 
-	function validationHelpRequest(context) {
-	    var type = 'help_request';
+	          var _this$issue$entityIds = _slicedToArray(this.issue.entityIds, 3),
+	              endNodeId = _this$issue$entityIds[1],
+	              crossWayId = _this$issue$entityIds[2];
 
-	    var validation = function checkFixmeTag(entity) {
+	          var midNode = context.entity(this.issue.data.midId);
+	          var endNode = context.entity(endNodeId);
+	          var crossWay = context.entity(crossWayId); // When endpoints are close, just join if resulting small change in angle (#7201)
 
-	        if (!entity.tags.fixme) { return []; }
+	          var nearEndNodes = findNearbyEndNodes(endNode, crossWay);
 
-	        // don't flag fixmes on features added by the user
-	        if (entity.version === undefined) { return []; }
+	          if (nearEndNodes.length > 0) {
+	            var collinear = findSmallJoinAngle(midNode, endNode, nearEndNodes);
 
-	        if (entity.v !== undefined) {
-	            var baseEntity = context.history().base().hasEntity(entity.id);
-	            // don't flag fixmes added by the user on existing features
-	            if (!baseEntity || !baseEntity.tags.fixme) { return []; }
-	        }
+	            if (collinear) {
+	              context.perform(actionMergeNodes([collinear.id, endNode.id], collinear.loc), annotation);
+	              return;
+	            }
+	          }
 
-	        return [new validationIssue({
-	            type: type,
-	            subtype: 'fixme_tag',
-	            severity: 'warning',
-	            message: function(context) {
-	                var entity = context.hasEntity(this.entityIds[0]);
-	                return entity ? _t('issues.fixme_tag.message', { feature: utilDisplayLabel(entity, context.graph()) }) : '';
-	            },
-	            dynamicFixes: function() {
-	                return [
-	                    new validationIssueFix({
-	                        title: _t('issues.fix.address_the_concern.title')
-	                    })
-	                ];
-	            },
-	            reference: showReference,
-	            entityIds: [entity.id]
-	        })];
+	          var targetEdge = this.issue.data.edge;
+	          var crossLoc = this.issue.data.cross_loc;
+	          var edgeNodes = [context.entity(targetEdge[0]), context.entity(targetEdge[1])];
+	          var closestNodeInfo = geoSphericalClosestNode(edgeNodes, crossLoc); // already a point nearby, just connect to that
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.fixme_tag.reference'));
+	          if (closestNodeInfo.distance < WELD_TH_METERS) {
+	            context.perform(actionMergeNodes([closestNodeInfo.node.id, endNode.id], closestNodeInfo.node.loc), annotation); // else add the end node to the edge way
+	          } else {
+	            context.perform(actionAddMidpoint({
+	              loc: crossLoc,
+	              edge: targetEdge
+	            }, endNode), annotation);
+	          }
 	        }
-	    };
-
-	    validation.type = type;
-
-	    return validation;
-	}
-
-	function validationImpossibleOneway() {
-	    var type = 'impossible_oneway';
-
-	    var validation = function checkImpossibleOneway(entity, graph) {
-
-	        if (entity.type !== 'way' || entity.geometry(graph) !== 'line') { return []; }
-
-	        if (entity.isClosed()) { return []; }
+	      })];
+	      var node = context.hasEntity(this.entityIds[1]);
 
-	        if (!typeForWay(entity)) { return []; }
+	      if (node && !node.hasInterestingTags()) {
+	        // node has no descriptive tags, suggest noexit fix
+	        fixes.push(new validationIssueFix({
+	          icon: 'maki-barrier',
+	          title: _t.html('issues.fix.tag_as_disconnected.title'),
+	          onClick: function onClick(context) {
+	            var nodeID = this.issue.entityIds[1];
+	            var tags = Object.assign({}, context.entity(nodeID).tags);
+	            tags.noexit = 'yes';
+	            context.perform(actionChangeTags(nodeID, tags), _t('issues.fix.tag_as_disconnected.annotation'));
+	          }
+	        }));
+	      }
 
-	        if (!isOneway(entity)) { return []; }
+	      return fixes;
+	    }
 
-	        var firstIssues = issuesForNode(entity, entity.first());
-	        var lastIssues = issuesForNode(entity, entity.last());
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.almost_junction.highway-highway.reference'));
+	    }
 
-	        return firstIssues.concat(lastIssues);
+	    function isExtendableCandidate(node, way) {
+	      // can not accurately test vertices on tiles not downloaded from osm - #5938
+	      var osm = services.osm;
 
-	        function typeForWay(way) {
-	            if (way.geometry(graph) !== 'line') { return null; }
+	      if (osm && !osm.isDataLoaded(node.loc)) {
+	        return false;
+	      }
 
-	            if (osmRoutableHighwayTagValues[way.tags.highway]) { return 'highway'; }
-	            if (osmFlowingWaterwayTagValues[way.tags.waterway]) { return 'waterway'; }
-	            return null;
-	        }
+	      if (isTaggedAsNotContinuing(node) || graph.parentWays(node).length !== 1) {
+	        return false;
+	      }
 
-	        function isOneway(way) {
-	            if (way.tags.oneway === 'yes') { return true; }
-	            if (way.tags.oneway) { return false; }
+	      var occurrences = 0;
 
-	            for (var key in way.tags) {
-	                if (osmOneWayTags[key] && osmOneWayTags[key][way.tags[key]]) {
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
+	      for (var index in way.nodes) {
+	        if (way.nodes[index] === node.id) {
+	          occurrences += 1;
 
-	        function nodeOccursMoreThanOnce(way, nodeID) {
-	            var occurences = 0;
-	            for (var index in way.nodes) {
-	                if (way.nodes[index] === nodeID) {
-	                    occurences += 1;
-	                    if (occurences > 1) { return true; }
-	                }
-	            }
+	          if (occurrences > 1) {
 	            return false;
+	          }
 	        }
+	      }
 
-	        function isConnectedViaOtherTypes(way, node) {
-
-	            var wayType = typeForWay(way);
+	      return true;
+	    }
 
-	            if (wayType === 'highway') {
-	                // entrances are considered connected
-	                if (node.tags.entrance && node.tags.entrance !== 'no') { return true; }
-	                if (node.tags.amenity === 'parking_entrance') { return true; }
-	            } else if (wayType === 'waterway') {
-	                if (node.id === way.first()) {
-	                    // multiple waterways may start at the same spring
-	                    if (node.tags.natural === 'spring') { return true; }
-	                } else {
-	                    // multiple waterways may end at the same drain
-	                    if (node.tags.manhole === 'drain') { return true; }
-	                }
-	            }
+	    function findConnectableEndNodesByExtension(way) {
+	      var results = [];
+	      if (way.isClosed()) return results;
+	      var testNodes;
+	      var indices = [0, way.nodes.length - 1];
+	      indices.forEach(function (nodeIndex) {
+	        var nodeID = way.nodes[nodeIndex];
+	        var node = graph.entity(nodeID);
+	        if (!isExtendableCandidate(node, way)) return;
+	        var connectionInfo = canConnectByExtend(way, nodeIndex);
+	        if (!connectionInfo) return;
+	        testNodes = graph.childNodes(way).slice(); // shallow copy
 
-	            return graph.parentWays(node).some(function(parentWay) {
-	                if (parentWay.id === way.id) { return false; }
+	        testNodes[nodeIndex] = testNodes[nodeIndex].move(connectionInfo.cross_loc); // don't flag issue if connecting the ways would cause self-intersection
 
-	                if (wayType === 'highway') {
+	        if (geoHasSelfIntersections(testNodes, nodeID)) return;
+	        results.push(connectionInfo);
+	      });
+	      return results;
+	    }
 
-	                    // allow connections to highway areas
-	                    if (parentWay.geometry(graph) === 'area' &&
-	                        osmRoutableHighwayTagValues[parentWay.tags.highway]) { return true; }
+	    function findNearbyEndNodes(node, way) {
+	      return [way.nodes[0], way.nodes[way.nodes.length - 1]].map(function (d) {
+	        return graph.entity(d);
+	      }).filter(function (d) {
+	        // Node cannot be near to itself, but other endnode of same way could be
+	        return d.id !== node.id && geoSphericalDistance(node.loc, d.loc) <= CLOSE_NODE_TH;
+	      });
+	    }
 
-	                    // count connections to ferry routes as connected
-	                    if (parentWay.tags.route === 'ferry') { return true; }
+	    function findSmallJoinAngle(midNode, tipNode, endNodes) {
+	      // Both nodes could be close, so want to join whichever is closest to collinear
+	      var joinTo;
+	      var minAngle = Infinity; // Checks midNode -> tipNode -> endNode for collinearity
 
-	                    return graph.parentRelations(parentWay).some(function(parentRelation) {
-	                        if (parentRelation.tags.type === 'route' &&
-	                            parentRelation.tags.route === 'ferry') { return true; }
+	      endNodes.forEach(function (endNode) {
+	        var a1 = geoAngle(midNode, tipNode, context.projection) + Math.PI;
+	        var a2 = geoAngle(midNode, endNode, context.projection) + Math.PI;
+	        var diff = Math.max(a1, a2) - Math.min(a1, a2);
 
-	                        // allow connections to highway multipolygons
-	                        return parentRelation.isMultipolygon() && osmRoutableHighwayTagValues[parentRelation.tags.highway];
-	                    });
-	                } else if (wayType === 'waterway') {
-	                    // multiple waterways may start or end at a water body at the same node
-	                    if (parentWay.tags.natural === 'water' ||
-	                        parentWay.tags.natural === 'coastline') { return true; }
-	                }
-	                return false;
-	            });
+	        if (diff < minAngle) {
+	          joinTo = endNode;
+	          minAngle = diff;
 	        }
+	      });
+	      /* Threshold set by considering right angle triangle
+	      based on node joining threshold and extension distance */
 
-	        function issuesForNode(way, nodeID) {
+	      if (minAngle <= SIG_ANGLE_TH) return joinTo;
+	      return null;
+	    }
 
-	            var isFirst = nodeID === way.first();
+	    function hasTag(tags, key) {
+	      return tags[key] !== undefined && tags[key] !== 'no';
+	    }
 
-	            var wayType = typeForWay(way);
+	    function canConnectWays(way, way2) {
+	      // allow self-connections
+	      if (way.id === way2.id) return true; // if one is bridge or tunnel, both must be bridge or tunnel
 
-	            // ignore if this way is self-connected at this node
-	            if (nodeOccursMoreThanOnce(way, nodeID)) { return []; }
+	      if ((hasTag(way.tags, 'bridge') || hasTag(way2.tags, 'bridge')) && !(hasTag(way.tags, 'bridge') && hasTag(way2.tags, 'bridge'))) return false;
+	      if ((hasTag(way.tags, 'tunnel') || hasTag(way2.tags, 'tunnel')) && !(hasTag(way.tags, 'tunnel') && hasTag(way2.tags, 'tunnel'))) return false; // must have equivalent layers and levels
 
-	            var osm = services.osm;
-	            if (!osm) { return []; }
+	      var layer1 = way.tags.layer || '0',
+	          layer2 = way2.tags.layer || '0';
+	      if (layer1 !== layer2) return false;
+	      var level1 = way.tags.level || '0',
+	          level2 = way2.tags.level || '0';
+	      if (level1 !== level2) return false;
+	      return true;
+	    }
 
-	            var node = graph.hasEntity(nodeID);
+	    function canConnectByExtend(way, endNodeIdx) {
+	      var tipNid = way.nodes[endNodeIdx]; // the 'tip' node for extension point
 
-	            // ignore if this node or its tile are unloaded
-	            if (!node || !osm.isDataLoaded(node.loc)) { return []; }
+	      var midNid = endNodeIdx === 0 ? way.nodes[1] : way.nodes[way.nodes.length - 2]; // the other node of the edge
 
-	            if (isConnectedViaOtherTypes(way, node)) { return []; }
+	      var tipNode = graph.entity(tipNid);
+	      var midNode = graph.entity(midNid);
+	      var lon = tipNode.loc[0];
+	      var lat = tipNode.loc[1];
+	      var lon_range = geoMetersToLon(EXTEND_TH_METERS, lat) / 2;
+	      var lat_range = geoMetersToLat(EXTEND_TH_METERS) / 2;
+	      var queryExtent = geoExtent([[lon - lon_range, lat - lat_range], [lon + lon_range, lat + lat_range]]); // first, extend the edge of [midNode -> tipNode] by EXTEND_TH_METERS and find the "extended tip" location
 
-	            var attachedWaysOfSameType = graph.parentWays(node).filter(function(parentWay) {
-	                if (parentWay.id === way.id) { return false; }
-	                return typeForWay(parentWay) === wayType;
-	            });
+	      var edgeLen = geoSphericalDistance(midNode.loc, tipNode.loc);
+	      var t = EXTEND_TH_METERS / edgeLen + 1.0;
+	      var extTipLoc = geoVecInterp(midNode.loc, tipNode.loc, t); // then, check if the extension part [tipNode.loc -> extTipLoc] intersects any other ways
 
-	            // assume it's okay for waterways to start or end disconnected for now
-	            if (wayType === 'waterway' && attachedWaysOfSameType.length === 0) { return []; }
+	      var segmentInfos = tree.waySegments(queryExtent, graph);
 
-	            var attachedOneways = attachedWaysOfSameType.filter(function(attachedWay) {
-	                return isOneway(attachedWay);
-	            });
+	      for (var i = 0; i < segmentInfos.length; i++) {
+	        var segmentInfo = segmentInfos[i];
+	        var way2 = graph.entity(segmentInfo.wayId);
+	        if (!isHighway(way2)) continue;
+	        if (!canConnectWays(way, way2)) continue;
+	        var nAid = segmentInfo.nodes[0],
+	            nBid = segmentInfo.nodes[1];
+	        if (nAid === tipNid || nBid === tipNid) continue;
+	        var nA = graph.entity(nAid),
+	            nB = graph.entity(nBid);
+	        var crossLoc = geoLineIntersection([tipNode.loc, extTipLoc], [nA.loc, nB.loc]);
 
-	            // ignore if the way is connected to some non-oneway features
-	            if (attachedOneways.length < attachedWaysOfSameType.length) { return []; }
+	        if (crossLoc) {
+	          return {
+	            mid: midNode,
+	            node: tipNode,
+	            wid: way2.id,
+	            edge: [nA.id, nB.id],
+	            cross_loc: crossLoc
+	          };
+	        }
+	      }
 
-	            if (attachedOneways.length) {
-	                var connectedEndpointsOkay = attachedOneways.some(function(attachedOneway) {
-	                    if ((isFirst ? attachedOneway.first() : attachedOneway.last()) !== nodeID) { return true; }
-	                    if (nodeOccursMoreThanOnce(attachedOneway, nodeID)) { return true; }
-	                    return false;
-	                });
-	                if (connectedEndpointsOkay) { return []; }
-	            }
+	      return null;
+	    }
+	  };
 
-	            var placement = isFirst ? 'start' : 'end',
-	                messageID = wayType + '.',
-	                referenceID = wayType + '.';
+	  validation.type = type;
+	  return validation;
+	}
 
-	            if (wayType === 'waterway') {
-	                messageID += 'connected.' + placement;
-	                referenceID += 'connected';
-	            } else {
-	                messageID += placement;
-	                referenceID += placement;
-	            }
+	function validationCloseNodes(context) {
+	  var type = 'close_nodes';
+	  var pointThresholdMeters = 0.2;
 
-	            return [new validationIssue({
-	                type: type,
-	                subtype: wayType,
-	                severity: 'warning',
-	                message: function(context) {
-	                    var entity = context.hasEntity(this.entityIds[0]);
-	                    return entity ? _t('issues.impossible_oneway.' + messageID + '.message', {
-	                        feature: utilDisplayLabel(entity, context.graph())
-	                    }) : '';
-	                },
-	                reference: getReference(referenceID),
-	                entityIds: [way.id, node.id],
-	                dynamicFixes: function() {
-
-	                    var fixes = [];
-
-	                    if (attachedOneways.length) {
-	                        fixes.push(new validationIssueFix({
-	                            icon: 'iD-operation-reverse',
-	                            title: _t('issues.fix.reverse_feature.title'),
-	                            entityIds: [way.id],
-	                            onClick: function(context) {
-	                                var id = this.issue.entityIds[0];
-	                                context.perform(actionReverse(id), _t('operations.reverse.annotation'));
-	                            }
-	                        }));
-	                    }
-	                    if (node.tags.noexit !== 'yes') {
-	                        var textDirection = _mainLocalizer.textDirection();
-	                        var useLeftContinue = (isFirst && textDirection === 'ltr') ||
-	                            (!isFirst && textDirection === 'rtl');
-	                        fixes.push(new validationIssueFix({
-	                            icon: 'iD-operation-continue' + (useLeftContinue ? '-left' : ''),
-	                            title: _t('issues.fix.continue_from_' + (isFirst ? 'start' : 'end') + '.title'),
-	                            onClick: function(context) {
-	                                var entityID = this.issue.entityIds[0];
-	                                var vertexID = this.issue.entityIds[1];
-	                                var way = context.entity(entityID);
-	                                var vertex = context.entity(vertexID);
-	                                continueDrawing(way, vertex, context);
-	                            }
-	                        }));
-	                    }
+	  var validation = function validation(entity, graph) {
+	    if (entity.type === 'node') {
+	      return getIssuesForNode(entity);
+	    } else if (entity.type === 'way') {
+	      return getIssuesForWay(entity);
+	    }
 
-	                    return fixes;
-	                },
-	                loc: node.loc
-	            })];
-
-	            function getReference(referenceID) {
-	                return function showReference(selection) {
-	                    selection.selectAll('.issue-reference')
-	                        .data([0])
-	                        .enter()
-	                        .append('div')
-	                        .attr('class', 'issue-reference')
-	                        .text(_t('issues.impossible_oneway.' + referenceID + '.reference'));
-	                };
-	            }
-	        }
-	    };
+	    return [];
 
-	    function continueDrawing(way, vertex, context) {
-	        // make sure the vertex is actually visible and editable
-	        var map = context.map();
-	        if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
-	            map.zoomToEase(vertex);
-	        }
+	    function getIssuesForNode(node) {
+	      var parentWays = graph.parentWays(node);
 
-	        context.enter(
-	            modeDrawLine(context, way.id, context.graph(), 'line', way.affix(vertex.id), true)
-	        );
+	      if (parentWays.length) {
+	        return getIssuesForVertex(node, parentWays);
+	      } else {
+	        return getIssuesForDetachedPoint(node);
+	      }
 	    }
 
-	    validation.type = type;
+	    function wayTypeFor(way) {
+	      if (way.tags.boundary && way.tags.boundary !== 'no') return 'boundary';
+	      if (way.tags.indoor && way.tags.indoor !== 'no') return 'indoor';
+	      if (way.tags.building && way.tags.building !== 'no' || way.tags['building:part'] && way.tags['building:part'] !== 'no') return 'building';
+	      if (osmPathHighwayTagValues[way.tags.highway]) return 'path';
+	      var parentRelations = graph.parentRelations(way);
 
-	    return validation;
-	}
+	      for (var i in parentRelations) {
+	        var relation = parentRelations[i];
+	        if (relation.tags.type === 'boundary') return 'boundary';
 
-	function validationIncompatibleSource() {
-	    var type = 'incompatible_source';
-	    var invalidSources = [
-	        {
-	            id:'google', regex:'google', exceptRegex: 'books.google|Google Books|drive.google|googledrive|Google Drive'
+	        if (relation.isMultipolygon()) {
+	          if (relation.tags.indoor && relation.tags.indoor !== 'no') return 'indoor';
+	          if (relation.tags.building && relation.tags.building !== 'no' || relation.tags['building:part'] && relation.tags['building:part'] !== 'no') return 'building';
 	        }
-	    ];
+	      }
 
-	    var validation = function checkIncompatibleSource(entity) {
+	      return 'other';
+	    }
 
-	        var entitySources = entity.tags && entity.tags.source && entity.tags.source.split(';');
+	    function shouldCheckWay(way) {
+	      // don't flag issues where merging would create degenerate ways
+	      if (way.nodes.length <= 2 || way.isClosed() && way.nodes.length <= 4) return false;
+	      var bbox = way.extent(graph).bbox();
+	      var hypotenuseMeters = geoSphericalDistance([bbox.minX, bbox.minY], [bbox.maxX, bbox.maxY]); // don't flag close nodes in very small ways
 
-	        if (!entitySources) { return []; }
+	      if (hypotenuseMeters < 1.5) return false;
+	      return true;
+	    }
 
-	        var issues = [];
+	    function getIssuesForWay(way) {
+	      if (!shouldCheckWay(way)) return [];
+	      var issues = [],
+	          nodes = graph.childNodes(way);
 
-	        invalidSources.forEach(function(invalidSource) {
+	      for (var i = 0; i < nodes.length - 1; i++) {
+	        var node1 = nodes[i];
+	        var node2 = nodes[i + 1];
+	        var issue = getWayIssueIfAny(node1, node2, way);
+	        if (issue) issues.push(issue);
+	      }
 
-	            var hasInvalidSource = entitySources.some(function(source) {
-	                if (!source.match(new RegExp(invalidSource.regex, 'i'))) { return false; }
-	                if (invalidSource.exceptRegex && source.match(new RegExp(invalidSource.exceptRegex, 'i'))) { return false; }
-	                return true;
-	            });
+	      return issues;
+	    }
 
-	            if (!hasInvalidSource) { return; }
+	    function getIssuesForVertex(node, parentWays) {
+	      var issues = [];
 
-	            issues.push(new validationIssue({
-	                type: type,
-	                severity: 'warning',
-	                message: function(context) {
-	                    var entity = context.hasEntity(this.entityIds[0]);
-	                    return entity ? _t('issues.incompatible_source.' + invalidSource.id + '.feature.message', {
-	                        feature: utilDisplayLabel(entity, context.graph())
-	                    }) : '';
-	                },
-	                reference: getReference(invalidSource.id),
-	                entityIds: [entity.id],
-	                dynamicFixes: function() {
-	                    return [
-	                        new validationIssueFix({
-	                            title: _t('issues.fix.remove_proprietary_data.title')
-	                        })
-	                    ];
-	                }
-	            }));
-	        });
+	      function checkForCloseness(node1, node2, way) {
+	        var issue = getWayIssueIfAny(node1, node2, way);
+	        if (issue) issues.push(issue);
+	      }
 
-	        return issues;
+	      for (var i = 0; i < parentWays.length; i++) {
+	        var parentWay = parentWays[i];
+	        if (!shouldCheckWay(parentWay)) continue;
+	        var lastIndex = parentWay.nodes.length - 1;
 
+	        for (var j = 0; j < parentWay.nodes.length; j++) {
+	          if (j !== 0) {
+	            if (parentWay.nodes[j - 1] === node.id) {
+	              checkForCloseness(node, graph.entity(parentWay.nodes[j]), parentWay);
+	            }
+	          }
 
-	        function getReference(id) {
-	            return function showReference(selection) {
-	                selection.selectAll('.issue-reference')
-	                    .data([0])
-	                    .enter()
-	                    .append('div')
-	                    .attr('class', 'issue-reference')
-	                    .text(_t('issues.incompatible_source.' + id + '.reference'));
-	            };
+	          if (j !== lastIndex) {
+	            if (parentWay.nodes[j + 1] === node.id) {
+	              checkForCloseness(graph.entity(parentWay.nodes[j]), node, parentWay);
+	            }
+	          }
 	        }
-	    };
+	      }
 
-	    validation.type = type;
+	      return issues;
+	    }
 
-	    return validation;
-	}
+	    function thresholdMetersForWay(way) {
+	      if (!shouldCheckWay(way)) return 0;
+	      var wayType = wayTypeFor(way); // don't flag boundaries since they might be highly detailed and can't be easily verified
 
-	function validationMaprules() {
-	    var type = 'maprules';
+	      if (wayType === 'boundary') return 0; // expect some features to be mapped with higher levels of detail
 
-	    var validation = function checkMaprules(entity, graph) {
-	        if (!services.maprules) { return []; }
+	      if (wayType === 'indoor') return 0.01;
+	      if (wayType === 'building') return 0.05;
+	      if (wayType === 'path') return 0.1;
+	      return 0.2;
+	    }
 
-	        var rules = services.maprules.validationRules();
-	        var issues = [];
+	    function getIssuesForDetachedPoint(node) {
+	      var issues = [];
+	      var lon = node.loc[0];
+	      var lat = node.loc[1];
+	      var lon_range = geoMetersToLon(pointThresholdMeters, lat) / 2;
+	      var lat_range = geoMetersToLat(pointThresholdMeters) / 2;
+	      var queryExtent = geoExtent([[lon - lon_range, lat - lat_range], [lon + lon_range, lat + lat_range]]);
+	      var intersected = context.history().tree().intersects(queryExtent, graph);
 
-	        for (var i = 0; i < rules.length; i++) {
-	            var rule = rules[i];
-	            rule.findIssues(entity, graph, issues);
-	        }
+	      for (var j = 0; j < intersected.length; j++) {
+	        var nearby = intersected[j];
+	        if (nearby.id === node.id) continue;
+	        if (nearby.type !== 'node' || nearby.geometry(graph) !== 'point') continue;
 
-	        return issues;
-	    };
+	        if (nearby.loc === node.loc || geoSphericalDistance(node.loc, nearby.loc) < pointThresholdMeters) {
+	          // allow very close points if tags indicate the z-axis might vary
+	          var zAxisKeys = {
+	            layer: true,
+	            level: true,
+	            'addr:housenumber': true,
+	            'addr:unit': true
+	          };
+	          var zAxisDifferentiates = false;
 
+	          for (var key in zAxisKeys) {
+	            var nodeValue = node.tags[key] || '0';
+	            var nearbyValue = nearby.tags[key] || '0';
 
-	    validation.type = type;
+	            if (nodeValue !== nearbyValue) {
+	              zAxisDifferentiates = true;
+	              break;
+	            }
+	          }
 
-	    return validation;
-	}
+	          if (zAxisDifferentiates) continue;
+	          issues.push(new validationIssue({
+	            type: type,
+	            subtype: 'detached',
+	            severity: 'warning',
+	            message: function message(context) {
+	              var entity = context.hasEntity(this.entityIds[0]),
+	                  entity2 = context.hasEntity(this.entityIds[1]);
+	              return entity && entity2 ? _t.html('issues.close_nodes.detached.message', {
+	                feature: utilDisplayLabel(entity, context.graph()),
+	                feature2: utilDisplayLabel(entity2, context.graph())
+	              }) : '';
+	            },
+	            reference: showReference,
+	            entityIds: [node.id, nearby.id],
+	            dynamicFixes: function dynamicFixes() {
+	              return [new validationIssueFix({
+	                icon: 'iD-operation-disconnect',
+	                title: _t.html('issues.fix.move_points_apart.title')
+	              }), new validationIssueFix({
+	                icon: 'iD-icon-layers',
+	                title: _t.html('issues.fix.use_different_layers_or_levels.title')
+	              })];
+	            }
+	          }));
+	        }
+	      }
 
-	function validationMismatchedGeometry() {
-	    var type = 'mismatched_geometry';
+	      return issues;
 
-	    function tagSuggestingLineIsArea(entity) {
-	        if (entity.type !== 'way' || entity.isClosed()) { return null; }
+	      function showReference(selection) {
+	        var referenceText = _t('issues.close_nodes.detached.reference');
+	        selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(referenceText);
+	      }
+	    }
 
-	        var tagSuggestingArea = entity.tagSuggestingArea();
-	        if (!tagSuggestingArea) {
-	            return null;
-	        }
+	    function getWayIssueIfAny(node1, node2, way) {
+	      if (node1.id === node2.id || node1.hasInterestingTags() && node2.hasInterestingTags()) {
+	        return null;
+	      }
 
-	        var asLine = _mainPresetIndex.matchTags(tagSuggestingArea, 'line');
-	        var asArea = _mainPresetIndex.matchTags(tagSuggestingArea, 'area');
-	        if (asLine && asArea && (asLine === asArea)) {
-	            // these tags also allow lines and making this an area wouldn't matter
-	            return null;
+	      if (node1.loc !== node2.loc) {
+	        var parentWays1 = graph.parentWays(node1);
+	        var parentWays2 = new Set(graph.parentWays(node2));
+	        var sharedWays = parentWays1.filter(function (parentWay) {
+	          return parentWays2.has(parentWay);
+	        });
+	        var thresholds = sharedWays.map(function (parentWay) {
+	          return thresholdMetersForWay(parentWay);
+	        });
+	        var threshold = Math.min.apply(Math, _toConsumableArray(thresholds));
+	        var distance = geoSphericalDistance(node1.loc, node2.loc);
+	        if (distance > threshold) return null;
+	      }
+
+	      return new validationIssue({
+	        type: type,
+	        subtype: 'vertices',
+	        severity: 'warning',
+	        message: function message(context) {
+	          var entity = context.hasEntity(this.entityIds[0]);
+	          return entity ? _t.html('issues.close_nodes.message', {
+	            way: utilDisplayLabel(entity, context.graph())
+	          }) : '';
+	        },
+	        reference: showReference,
+	        entityIds: [way.id, node1.id, node2.id],
+	        loc: node1.loc,
+	        dynamicFixes: function dynamicFixes() {
+	          return [new validationIssueFix({
+	            icon: 'iD-icon-plus',
+	            title: _t.html('issues.fix.merge_points.title'),
+	            onClick: function onClick(context) {
+	              var entityIds = this.issue.entityIds;
+	              var action = actionMergeNodes([entityIds[1], entityIds[2]]);
+	              context.perform(action, _t('issues.fix.merge_close_vertices.annotation'));
+	            }
+	          }), new validationIssueFix({
+	            icon: 'iD-operation-disconnect',
+	            title: _t.html('issues.fix.move_points_apart.title')
+	          })];
 	        }
+	      });
 
-	        return tagSuggestingArea;
+	      function showReference(selection) {
+	        var referenceText = _t('issues.close_nodes.reference');
+	        selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(referenceText);
+	      }
 	    }
+	  };
 
+	  validation.type = type;
+	  return validation;
+	}
 
-	    function makeConnectEndpointsFixOnClick(way, graph) {
-	        // must have at least three nodes to close this automatically
-	        if (way.nodes.length < 3) { return null; }
+	function validationCrossingWays(context) {
+	  var type = 'crossing_ways'; // returns the way or its parent relation, whichever has a useful feature type
 
-	        var nodes = graph.childNodes(way), testNodes;
-	        var firstToLastDistanceMeters = geoSphericalDistance(nodes[0].loc, nodes[nodes.length-1].loc);
+	  function getFeatureWithFeatureTypeTagsForWay(way, graph) {
+	    if (getFeatureType(way, graph) === null) {
+	      // if the way doesn't match a feature type, check its parent relations
+	      var parentRels = graph.parentRelations(way);
 
-	        // if the distance is very small, attempt to merge the endpoints
-	        if (firstToLastDistanceMeters < 0.75) {
-	            testNodes = nodes.slice();   // shallow copy
-	            testNodes.pop();
-	            testNodes.push(testNodes[0]);
-	            // make sure this will not create a self-intersection
-	            if (!geoHasSelfIntersections(testNodes, testNodes[0].id)) {
-	                return function(context) {
-	                    var way = context.entity(this.issue.entityIds[0]);
-	                    context.perform(
-	                        actionMergeNodes([way.nodes[0], way.nodes[way.nodes.length-1]], nodes[0].loc),
-	                        _t('issues.fix.connect_endpoints.annotation')
-	                    );
-	                };
-	            }
-	        }
+	      for (var i = 0; i < parentRels.length; i++) {
+	        var rel = parentRels[i];
 
-	        // if the points were not merged, attempt to close the way
-	        testNodes = nodes.slice();   // shallow copy
-	        testNodes.push(testNodes[0]);
-	        // make sure this will not create a self-intersection
-	        if (!geoHasSelfIntersections(testNodes, testNodes[0].id)) {
-	            return function(context) {
-	                var wayId = this.issue.entityIds[0];
-	                var way = context.entity(wayId);
-	                var nodeId = way.nodes[0];
-	                var index = way.nodes.length;
-	                context.perform(
-	                    actionAddVertex(wayId, nodeId, index),
-	                    _t('issues.fix.connect_endpoints.annotation')
-	                );
-	            };
+	        if (getFeatureType(rel, graph) !== null) {
+	          return rel;
 	        }
+	      }
 	    }
 
-	    function lineTaggedAsAreaIssue(entity) {
+	    return way;
+	  }
 
-	        var tagSuggestingArea = tagSuggestingLineIsArea(entity);
-	        if (!tagSuggestingArea) { return null; }
+	  function hasTag(tags, key) {
+	    return tags[key] !== undefined && tags[key] !== 'no';
+	  }
 
-	        return new validationIssue({
-	            type: type,
-	            subtype: 'area_as_line',
-	            severity: 'warning',
-	            message: function(context) {
-	                var entity = context.hasEntity(this.entityIds[0]);
-	                return entity ? _t('issues.tag_suggests_area.message', {
-	                    feature: utilDisplayLabel(entity, context.graph()),
-	                    tag: utilTagText({ tags: tagSuggestingArea })
-	                }) : '';
-	            },
-	            reference: showReference,
-	            entityIds: [entity.id],
-	            hash: JSON.stringify(tagSuggestingArea),
-	            dynamicFixes: function(context) {
+	  function taggedAsIndoor(tags) {
+	    return hasTag(tags, 'indoor') || hasTag(tags, 'level') || tags.highway === 'corridor';
+	  }
 
-	                var fixes = [];
+	  function allowsBridge(featureType) {
+	    return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
+	  }
 
-	                var entity = context.entity(this.entityIds[0]);
-	                var connectEndsOnClick = makeConnectEndpointsFixOnClick(entity, context.graph());
+	  function allowsTunnel(featureType) {
+	    return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
+	  } // discard
 
-	                fixes.push(new validationIssueFix({
-	                    title: _t('issues.fix.connect_endpoints.title'),
-	                    onClick: connectEndsOnClick
-	                }));
 
-	                fixes.push(new validationIssueFix({
-	                    icon: 'iD-operation-delete',
-	                    title: _t('issues.fix.remove_tag.title'),
-	                    onClick: function(context) {
-	                        var entityId = this.issue.entityIds[0];
-	                        var entity = context.entity(entityId);
-	                        var tags = Object.assign({}, entity.tags);  // shallow copy
-	                        for (var key in tagSuggestingArea) {
-	                            delete tags[key];
-	                        }
-	                        context.perform(
-	                            actionChangeTags(entityId, tags),
-	                            _t('issues.fix.remove_tag.annotation')
-	                        );
-	                    }
-	                }));
+	  var ignoredBuildings = {
+	    demolished: true,
+	    dismantled: true,
+	    proposed: true,
+	    razed: true
+	  };
 
-	                return fixes;
-	            }
-	        });
+	  function getFeatureType(entity, graph) {
+	    var geometry = entity.geometry(graph);
+	    if (geometry !== 'line' && geometry !== 'area') return null;
+	    var tags = entity.tags;
+	    if (hasTag(tags, 'building') && !ignoredBuildings[tags.building]) return 'building';
+	    if (hasTag(tags, 'highway') && osmRoutableHighwayTagValues[tags.highway]) return 'highway'; // don't check railway or waterway areas
 
+	    if (geometry !== 'line') return null;
+	    if (hasTag(tags, 'railway') && osmRailwayTrackTagValues[tags.railway]) return 'railway';
+	    if (hasTag(tags, 'waterway') && osmFlowingWaterwayTagValues[tags.waterway]) return 'waterway';
+	    return null;
+	  }
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.tag_suggests_area.reference'));
-	        }
-	    }
+	  function isLegitCrossing(tags1, featureType1, tags2, featureType2) {
+	    // assume 0 by default
+	    var level1 = tags1.level || '0';
+	    var level2 = tags2.level || '0';
 
-	    function vertexTaggedAsPointIssue(entity, graph) {
-	        // we only care about nodes
-	        if (entity.type !== 'node') { return null; }
+	    if (taggedAsIndoor(tags1) && taggedAsIndoor(tags2) && level1 !== level2) {
+	      // assume features don't interact if they're indoor on different levels
+	      return true;
+	    } // assume 0 by default; don't use way.layer() since we account for structures here
 
-	        // ignore tagless points
-	        if (Object.keys(entity.tags).length === 0) { return null; }
 
-	        // address lines are special so just ignore them
-	        if (entity.isOnAddressLine(graph)) { return null; }
+	    var layer1 = tags1.layer || '0';
+	    var layer2 = tags2.layer || '0';
 
-	        var geometry = entity.geometry(graph);
-	        var allowedGeometries = osmNodeGeometriesForTags(entity.tags);
+	    if (allowsBridge(featureType1) && allowsBridge(featureType2)) {
+	      if (hasTag(tags1, 'bridge') && !hasTag(tags2, 'bridge')) return true;
+	      if (!hasTag(tags1, 'bridge') && hasTag(tags2, 'bridge')) return true; // crossing bridges must use different layers
 
-	        if (geometry === 'point' && !allowedGeometries.point && allowedGeometries.vertex) {
+	      if (hasTag(tags1, 'bridge') && hasTag(tags2, 'bridge') && layer1 !== layer2) return true;
+	    } else if (allowsBridge(featureType1) && hasTag(tags1, 'bridge')) return true;else if (allowsBridge(featureType2) && hasTag(tags2, 'bridge')) return true;
 
-	            return new validationIssue({
-	                type: type,
-	                subtype: 'vertex_as_point',
-	                severity: 'warning',
-	                message: function(context) {
-	                    var entity = context.hasEntity(this.entityIds[0]);
-	                    return entity ? _t('issues.vertex_as_point.message', {
-	                        feature: utilDisplayLabel(entity, context.graph())
-	                    }) : '';
-	                },
-	                reference: function showReference(selection) {
-	                    selection.selectAll('.issue-reference')
-	                        .data([0])
-	                        .enter()
-	                        .append('div')
-	                        .attr('class', 'issue-reference')
-	                        .text(_t('issues.vertex_as_point.reference'));
-	                },
-	                entityIds: [entity.id]
-	            });
+	    if (allowsTunnel(featureType1) && allowsTunnel(featureType2)) {
+	      if (hasTag(tags1, 'tunnel') && !hasTag(tags2, 'tunnel')) return true;
+	      if (!hasTag(tags1, 'tunnel') && hasTag(tags2, 'tunnel')) return true; // crossing tunnels must use different layers
 
-	        } else if (geometry === 'vertex' && !allowedGeometries.vertex && allowedGeometries.point) {
+	      if (hasTag(tags1, 'tunnel') && hasTag(tags2, 'tunnel') && layer1 !== layer2) return true;
+	    } else if (allowsTunnel(featureType1) && hasTag(tags1, 'tunnel')) return true;else if (allowsTunnel(featureType2) && hasTag(tags2, 'tunnel')) return true; // don't flag crossing waterways and pier/highways
 
-	            return new validationIssue({
-	                type: type,
-	                subtype: 'point_as_vertex',
-	                severity: 'warning',
-	                message: function(context) {
-	                    var entity = context.hasEntity(this.entityIds[0]);
-	                    return entity ? _t('issues.point_as_vertex.message', {
-	                        feature: utilDisplayLabel(entity, context.graph())
-	                    }) : '';
-	                },
-	                reference: function showReference(selection) {
-	                    selection.selectAll('.issue-reference')
-	                        .data([0])
-	                        .enter()
-	                        .append('div')
-	                        .attr('class', 'issue-reference')
-	                        .text(_t('issues.point_as_vertex.reference'));
-	                },
-	                entityIds: [entity.id],
-	                dynamicFixes: function(context) {
-
-	                    var entityId = this.entityIds[0];
-
-	                    var extractOnClick = null;
-	                    if (!context.hasHiddenConnections(entityId)) {
-
-	                        extractOnClick = function(context) {
-	                            var entityId = this.issue.entityIds[0];
-	                            var action = actionExtract(entityId);
-	                            context.perform(
-	                                action,
-	                                _t('operations.extract.annotation.single')
-	                            );
-	                            // re-enter mode to trigger updates
-	                            context.enter(modeSelect(context, [action.getExtractedNodeID()]));
-	                        };
-	                    }
 
-	                    return [
-	                        new validationIssueFix({
-	                            icon: 'iD-operation-extract',
-	                            title: _t('issues.fix.extract_point.title'),
-	                            onClick: extractOnClick
-	                        })
-	                    ];
-	                }
-	            });
-	        }
+	    if (featureType1 === 'waterway' && featureType2 === 'highway' && tags2.man_made === 'pier') return true;
+	    if (featureType2 === 'waterway' && featureType1 === 'highway' && tags1.man_made === 'pier') return true;
 
-	        return null;
+	    if (featureType1 === 'building' || featureType2 === 'building') {
+	      // for building crossings, different layers are enough
+	      if (layer1 !== layer2) return true;
 	    }
 
-	    function unclosedMultipolygonPartIssues(entity, graph) {
+	    return false;
+	  } // highway values for which we shouldn't recommend connecting to waterways
 
-	        if (entity.type !== 'relation' ||
-	            !entity.isMultipolygon() ||
-	            entity.isDegenerate() ||
-	            // cannot determine issues for incompletely-downloaded relations
-	            !entity.isComplete(graph)) { return null; }
 
-	        var sequences = osmJoinWays(entity.members, graph);
+	  var highwaysDisallowingFords = {
+	    motorway: true,
+	    motorway_link: true,
+	    trunk: true,
+	    trunk_link: true,
+	    primary: true,
+	    primary_link: true,
+	    secondary: true,
+	    secondary_link: true
+	  };
+	  var nonCrossingHighways = {
+	    track: true
+	  };
 
-	        var issues = [];
+	  function tagsForConnectionNodeIfAllowed(entity1, entity2, graph) {
+	    var featureType1 = getFeatureType(entity1, graph);
+	    var featureType2 = getFeatureType(entity2, graph);
+	    var geometry1 = entity1.geometry(graph);
+	    var geometry2 = entity2.geometry(graph);
+	    var bothLines = geometry1 === 'line' && geometry2 === 'line';
 
-	        for (var i in sequences) {
-	            var sequence = sequences[i];
+	    if (featureType1 === featureType2) {
+	      if (featureType1 === 'highway') {
+	        var entity1IsPath = osmPathHighwayTagValues[entity1.tags.highway];
+	        var entity2IsPath = osmPathHighwayTagValues[entity2.tags.highway];
 
-	            if (!sequence.nodes) { continue; }
+	        if ((entity1IsPath || entity2IsPath) && entity1IsPath !== entity2IsPath) {
+	          // one feature is a path but not both
+	          var roadFeature = entity1IsPath ? entity2 : entity1;
 
-	            var firstNode = sequence.nodes[0];
-	            var lastNode = sequence.nodes[sequence.nodes.length - 1];
+	          if (nonCrossingHighways[roadFeature.tags.highway]) {
+	            // don't mark path connections with certain roads as crossings
+	            return {};
+	          }
 
-	            // part is closed if the first and last nodes are the same
-	            if (firstNode === lastNode) { continue; }
+	          var pathFeature = entity1IsPath ? entity1 : entity2;
 
-	            var issue = new validationIssue({
-	                type: type,
-	                subtype: 'unclosed_multipolygon_part',
-	                severity: 'warning',
-	                message: function(context) {
-	                    var entity = context.hasEntity(this.entityIds[0]);
-	                    return entity ? _t('issues.unclosed_multipolygon_part.message', {
-	                        feature: utilDisplayLabel(entity, context.graph())
-	                    }) : '';
-	                },
-	                reference: showReference,
-	                loc: sequence.nodes[0].loc,
-	                entityIds: [entity.id],
-	                hash: sequence.map(function(way) {
-	                    return way.id;
-	                }).join()
-	            });
-	            issues.push(issue);
-	        }
+	          if (['marked', 'unmarked'].indexOf(pathFeature.tags.crossing) !== -1) {
+	            // if the path is a crossing, match the crossing type
+	            return bothLines ? {
+	              highway: 'crossing',
+	              crossing: pathFeature.tags.crossing
+	            } : {};
+	          } // don't add a `crossing` subtag to ambiguous crossings
 
-	        return issues;
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.unclosed_multipolygon_part.reference'));
+	          return bothLines ? {
+	            highway: 'crossing'
+	          } : {};
 	        }
-	    }
 
-	    var validation = function checkMismatchedGeometry(entity, graph) {
-	        var issues = [
-	            vertexTaggedAsPointIssue(entity, graph),
-	            lineTaggedAsAreaIssue(entity)
-	        ];
-	        issues = issues.concat(unclosedMultipolygonPartIssues(entity, graph));
-	        return issues.filter(Boolean);
-	    };
+	        return {};
+	      }
 
-	    validation.type = type;
+	      if (featureType1 === 'waterway') return {};
+	      if (featureType1 === 'railway') return {};
+	    } else {
+	      var featureTypes = [featureType1, featureType2];
 
-	    return validation;
-	}
+	      if (featureTypes.indexOf('highway') !== -1) {
+	        if (featureTypes.indexOf('railway') !== -1) {
+	          if (!bothLines) return {};
+	          var isTram = entity1.tags.railway === 'tram' || entity2.tags.railway === 'tram';
 
-	function validationMissingRole() {
-	    var type = 'missing_role';
+	          if (osmPathHighwayTagValues[entity1.tags.highway] || osmPathHighwayTagValues[entity2.tags.highway]) {
+	            // path-tram connections use this tag
+	            if (isTram) return {
+	              railway: 'tram_crossing'
+	            }; // other path-rail connections use this tag
 
-	    var validation = function checkMissingRole(entity, graph) {
-	        var issues = [];
-	        if (entity.type === 'way') {
-	            graph.parentRelations(entity).forEach(function(relation) {
-	                if (!relation.isMultipolygon()) { return; }
+	            return {
+	              railway: 'crossing'
+	            };
+	          } else {
+	            // path-tram connections use this tag
+	            if (isTram) return {
+	              railway: 'tram_level_crossing'
+	            }; // other road-rail connections use this tag
 
-	                var member = relation.memberById(entity.id);
-	                if (member && isMissingRole(member)) {
-	                    issues.push(makeIssue(entity, relation, member));
-	                }
-	            });
-	        } else if (entity.type === 'relation' && entity.isMultipolygon()) {
-	            entity.indexedMembers().forEach(function(member) {
-	                var way = graph.hasEntity(member.id);
-	                if (way && isMissingRole(member)) {
-	                    issues.push(makeIssue(way, entity, member));
-	                }
-	            });
+	            return {
+	              railway: 'level_crossing'
+	            };
+	          }
 	        }
 
-	        return issues;
-	    };
-
-
-	    function isMissingRole(member) {
-	        return !member.role || !member.role.trim().length;
-	    }
-
-
-	    function makeIssue(way, relation, member) {
-	        return new validationIssue({
-	            type: type,
-	            severity: 'warning',
-	            message: function(context) {
-	                var member = context.hasEntity(this.entityIds[1]),
-	                    relation = context.hasEntity(this.entityIds[0]);
-	                return (member && relation) ? _t('issues.missing_role.message', {
-	                    member: utilDisplayLabel(member, context.graph()),
-	                    relation: utilDisplayLabel(relation, context.graph())
-	                }) : '';
-	            },
-	            reference: showReference,
-	            entityIds: [relation.id, way.id],
-	            data: {
-	                member: member
-	            },
-	            hash: member.index.toString(),
-	            dynamicFixes: function() {
-	                return [
-	                    makeAddRoleFix('inner'),
-	                    makeAddRoleFix('outer'),
-	                    new validationIssueFix({
-	                        icon: 'iD-operation-delete',
-	                        title: _t('issues.fix.remove_from_relation.title'),
-	                        onClick: function(context) {
-	                            context.perform(
-	                                actionDeleteMember(this.issue.entityIds[0], this.issue.data.member.index),
-	                                _t('operations.delete_member.annotation')
-	                            );
-	                        }
-	                    })
-	                ];
-	            }
-	        });
+	        if (featureTypes.indexOf('waterway') !== -1) {
+	          // do not allow fords on structures
+	          if (hasTag(entity1.tags, 'tunnel') && hasTag(entity2.tags, 'tunnel')) return null;
+	          if (hasTag(entity1.tags, 'bridge') && hasTag(entity2.tags, 'bridge')) return null;
 
+	          if (highwaysDisallowingFords[entity1.tags.highway] || highwaysDisallowingFords[entity2.tags.highway]) {
+	            // do not allow fords on major highways
+	            return null;
+	          }
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.missing_role.multipolygon.reference'));
+	          return bothLines ? {
+	            ford: 'yes'
+	          } : {};
 	        }
+	      }
 	    }
 
+	    return null;
+	  }
 
-	    function makeAddRoleFix(role) {
-	        return new validationIssueFix({
-	            title: _t('issues.fix.set_as_' + role + '.title'),
-	            onClick: function(context) {
-	                var oldMember = this.issue.data.member;
-	                var member = { id: this.issue.entityIds[1], type: oldMember.type, role: role };
-	                context.perform(
-	                    actionChangeMember(this.issue.entityIds[0], member, oldMember.index),
-	                    _t('operations.change_role.annotation')
-	                );
-	            }
-	        });
-	    }
-
-	    validation.type = type;
-
-	    return validation;
-	}
-
-	function validationMissingTag(context) {
-	    var type = 'missing_tag';
+	  function findCrossingsByWay(way1, graph, tree) {
+	    var edgeCrossInfos = [];
+	    if (way1.type !== 'way') return edgeCrossInfos;
+	    var taggedFeature1 = getFeatureWithFeatureTypeTagsForWay(way1, graph);
+	    var way1FeatureType = getFeatureType(taggedFeature1, graph);
+	    if (way1FeatureType === null) return edgeCrossInfos;
+	    var checkedSingleCrossingWays = {}; // declare vars ahead of time to reduce garbage collection
 
-	    function hasDescriptiveTags(entity, graph) {
-	        var keys = Object.keys(entity.tags)
-	            .filter(function(k) {
-	                if (k === 'area' || k === 'name') {
-	                    return false;
-	                } else {
-	                    return osmIsInterestingTag(k);
-	                }
-	            });
+	    var i, j;
+	    var extent;
+	    var n1, n2, nA, nB, nAId, nBId;
+	    var segment1, segment2;
+	    var oneOnly;
+	    var segmentInfos, segment2Info, way2, taggedFeature2, way2FeatureType;
+	    var way1Nodes = graph.childNodes(way1);
+	    var comparedWays = {};
 
-	        if (entity.type === 'relation' &&
-	            keys.length === 1 &&
-	            entity.tags.type === 'multipolygon') {
-	            // this relation's only interesting tag just says its a multipolygon,
-	            // which is not descriptive enough
+	    for (i = 0; i < way1Nodes.length - 1; i++) {
+	      n1 = way1Nodes[i];
+	      n2 = way1Nodes[i + 1];
+	      extent = geoExtent([[Math.min(n1.loc[0], n2.loc[0]), Math.min(n1.loc[1], n2.loc[1])], [Math.max(n1.loc[0], n2.loc[0]), Math.max(n1.loc[1], n2.loc[1])]]); // Optimize by only checking overlapping segments, not every segment
+	      // of overlapping ways
 
-	            // It's okay for a simple multipolygon to have no descriptive tags
-	            // if its outer way has them (old model, see `outdated_tags.js`)
-	            return osmOldMultipolygonOuterMemberOfRelation(entity, graph);
-	        }
+	      segmentInfos = tree.waySegments(extent, graph);
 
-	        return keys.length > 0;
-	    }
+	      for (j = 0; j < segmentInfos.length; j++) {
+	        segment2Info = segmentInfos[j]; // don't check for self-intersection in this validation
 
-	    function isUnknownRoad(entity) {
-	        return entity.type === 'way' && entity.tags.highway === 'road';
-	    }
+	        if (segment2Info.wayId === way1.id) continue; // skip if this way was already checked and only one issue is needed
 
-	    function isUntypedRelation(entity) {
-	        return entity.type === 'relation' && !entity.tags.type;
-	    }
+	        if (checkedSingleCrossingWays[segment2Info.wayId]) continue; // mark this way as checked even if there are no crossings
 
-	    var validation = function checkMissingTag(entity, graph) {
+	        comparedWays[segment2Info.wayId] = true;
+	        way2 = graph.hasEntity(segment2Info.wayId);
+	        if (!way2) continue;
+	        taggedFeature2 = getFeatureWithFeatureTypeTagsForWay(way2, graph); // only check crossing highway, waterway, building, and railway
 
-	        var subtype;
+	        way2FeatureType = getFeatureType(taggedFeature2, graph);
 
-	        var osm = context.connection();
-	        var isUnloadedNode = entity.type === 'node' && osm && !osm.isDataLoaded(entity.loc);
+	        if (way2FeatureType === null || isLegitCrossing(taggedFeature1.tags, way1FeatureType, taggedFeature2.tags, way2FeatureType)) {
+	          continue;
+	        } // create only one issue for building crossings
 
-	        // we can't know if the node is a vertex if the tile is undownloaded
-	        if (!isUnloadedNode &&
-	            // allow untagged nodes that are part of ways
-	            entity.geometry(graph) !== 'vertex' &&
-	            // allow untagged entities that are part of relations
-	            !entity.hasParentRelations(graph)) {
 
-	            if (Object.keys(entity.tags).length === 0) {
-	                subtype = 'any';
-	            } else if (!hasDescriptiveTags(entity, graph)) {
-	                subtype = 'descriptive';
-	            } else if (isUntypedRelation(entity)) {
-	                subtype = 'relation_type';
-	            }
-	        }
+	        oneOnly = way1FeatureType === 'building' || way2FeatureType === 'building';
+	        nAId = segment2Info.nodes[0];
+	        nBId = segment2Info.nodes[1];
 
-	        // flag an unknown road even if it's a member of a relation
-	        if (!subtype && isUnknownRoad(entity)) {
-	            subtype = 'highway_classification';
+	        if (nAId === n1.id || nAId === n2.id || nBId === n1.id || nBId === n2.id) {
+	          // n1 or n2 is a connection node; skip
+	          continue;
 	        }
 
-	        if (!subtype) { return []; }
-
-	        var messageID = subtype === 'highway_classification' ? 'unknown_road' : 'missing_tag.' + subtype;
-	        var referenceID = subtype === 'highway_classification' ? 'unknown_road' : 'missing_tag';
+	        nA = graph.hasEntity(nAId);
+	        if (!nA) continue;
+	        nB = graph.hasEntity(nBId);
+	        if (!nB) continue;
+	        segment1 = [n1.loc, n2.loc];
+	        segment2 = [nA.loc, nB.loc];
+	        var point = geoLineIntersection(segment1, segment2);
+
+	        if (point) {
+	          edgeCrossInfos.push({
+	            wayInfos: [{
+	              way: way1,
+	              featureType: way1FeatureType,
+	              edge: [n1.id, n2.id]
+	            }, {
+	              way: way2,
+	              featureType: way2FeatureType,
+	              edge: [nA.id, nB.id]
+	            }],
+	            crossPoint: point
+	          });
 
-	        // can always delete if the user created it in the first place..
-	        var canDelete = (entity.version === undefined || entity.v !== undefined);
-	        var severity = (canDelete && subtype !== 'highway_classification') ? 'error' : 'warning';
+	          if (oneOnly) {
+	            checkedSingleCrossingWays[way2.id] = true;
+	            break;
+	          }
+	        }
+	      }
+	    }
 
-	        return [new validationIssue({
-	            type: type,
-	            subtype: subtype,
-	            severity: severity,
-	            message: function(context) {
-	                var entity = context.hasEntity(this.entityIds[0]);
-	                return entity ? _t('issues.' + messageID + '.message', {
-	                    feature: utilDisplayLabel(entity, context.graph())
-	                }) : '';
-	            },
-	            reference: showReference,
-	            entityIds: [entity.id],
-	            dynamicFixes: function(context) {
+	    return edgeCrossInfos;
+	  }
 
-	                var fixes = [];
+	  function waysToCheck(entity, graph) {
+	    var featureType = getFeatureType(entity, graph);
+	    if (!featureType) return [];
 
-	                var selectFixType = subtype === 'highway_classification' ? 'select_road_type' : 'select_preset';
+	    if (entity.type === 'way') {
+	      return [entity];
+	    } else if (entity.type === 'relation') {
+	      return entity.members.reduce(function (array, member) {
+	        if (member.type === 'way' && ( // only look at geometry ways
+	        !member.role || member.role === 'outer' || member.role === 'inner')) {
+	          var entity = graph.hasEntity(member.id); // don't add duplicates
 
-	                fixes.push(new validationIssueFix({
-	                    icon: 'iD-icon-search',
-	                    title: _t('issues.fix.' + selectFixType + '.title'),
-	                    onClick: function(context) {
-	                        context.ui().sidebar.showPresetList();
-	                    }
-	                }));
+	          if (entity && array.indexOf(entity) === -1) {
+	            array.push(entity);
+	          }
+	        }
 
-	                var deleteOnClick;
-
-	                var id = this.entityIds[0];
-	                var operation = operationDelete(context, [id]);
-	                var disabledReasonID = operation.disabled();
-	                if (!disabledReasonID) {
-	                    deleteOnClick = function(context) {
-	                        var id = this.issue.entityIds[0];
-	                        var operation = operationDelete(context, [id]);
-	                        if (!operation.disabled()) {
-	                            operation();
-	                        }
-	                    };
-	                }
+	        return array;
+	      }, []);
+	    }
 
-	                fixes.push(
-	                    new validationIssueFix({
-	                        icon: 'iD-operation-delete',
-	                        title: _t('issues.fix.delete_feature.title'),
-	                        disabledReason: disabledReasonID ? _t('operations.delete.' + disabledReasonID + '.single') : undefined,
-	                        onClick: deleteOnClick
-	                    })
-	                );
+	    return [];
+	  }
 
-	                return fixes;
-	            }
-	        })];
+	  var validation = function checkCrossingWays(entity, graph) {
+	    var tree = context.history().tree();
+	    var ways = waysToCheck(entity, graph);
+	    var issues = []; // declare these here to reduce garbage collection
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.' + referenceID + '.reference'));
-	        }
-	    };
+	    var wayIndex, crossingIndex, crossings;
 
-	    validation.type = type;
+	    for (wayIndex in ways) {
+	      crossings = findCrossingsByWay(ways[wayIndex], graph, tree);
 
-	    return validation;
-	}
+	      for (crossingIndex in crossings) {
+	        issues.push(createIssue(crossings[crossingIndex], graph));
+	      }
+	    }
 
-	// remove spaces, punctuation, diacritics
-	var simplify = function (str) {
-	  return diacritics.remove(
-	    str
-	      .replace(/&/g, 'and')
-	      .replace(/[\s\-=_!"#%'*{},.\/:;?\(\)\[\]@\\$\^*+<>~`’\u00a1\u00a7\u00b6\u00b7\u00bf\u037e\u0387\u055a-\u055f\u0589\u05c0\u05c3\u05c6\u05f3\u05f4\u0609\u060a\u060c\u060d\u061b\u061e\u061f\u066a-\u066d\u06d4\u0700-\u070d\u07f7-\u07f9\u0830-\u083e\u085e\u0964\u0965\u0970\u0af0\u0df4\u0e4f\u0e5a\u0e5b\u0f04-\u0f12\u0f14\u0f85\u0fd0-\u0fd4\u0fd9\u0fda\u104a-\u104f\u10fb\u1360-\u1368\u166d\u166e\u16eb-\u16ed\u1735\u1736\u17d4-\u17d6\u17d8-\u17da\u1800-\u1805\u1807-\u180a\u1944\u1945\u1a1e\u1a1f\u1aa0-\u1aa6\u1aa8-\u1aad\u1b5a-\u1b60\u1bfc-\u1bff\u1c3b-\u1c3f\u1c7e\u1c7f\u1cc0-\u1cc7\u1cd3\u2016\u2017\u2020-\u2027\u2030-\u2038\u203b-\u203e\u2041-\u2043\u2047-\u2051\u2053\u2055-\u205e\u2cf9-\u2cfc\u2cfe\u2cff\u2d70\u2e00\u2e01\u2e06-\u2e08\u2e0b\u2e0e-\u2e16\u2e18\u2e19\u2e1b\u2e1e\u2e1f\u2e2a-\u2e2e\u2e30-\u2e39\u3001-\u3003\u303d\u30fb\ua4fe\ua4ff\ua60d-\ua60f\ua673\ua67e\ua6f2-\ua6f7\ua874-\ua877\ua8ce\ua8cf\ua8f8-\ua8fa\ua92e\ua92f\ua95f\ua9c1-\ua9cd\ua9de\ua9df\uaa5c-\uaa5f\uaade\uaadf\uaaf0\uaaf1\uabeb\ufe10-\ufe16\ufe19\ufe30\ufe45\ufe46\ufe49-\ufe4c\ufe50-\ufe52\ufe54-\ufe57\ufe5f-\ufe61\ufe68\ufe6a\ufe6b\uff01-\uff03\uff05-\uff07\uff0a\uff0c\uff0e\uff0f\uff1a\uff1b\uff1f\uff20\uff3c\uff61\uff64\uff65]+/g,'')
-	      .toLowerCase()
-	  );
-	};
+	    return issues;
+	  };
 
-	// toParts - split a name-suggestion-index key into parts
-	// {
-	//   kvnd:        "amenity/fast_food|Thaï Express~(North America)",
-	//   kvn:         "amenity/fast_food|Thaï Express",
-	//   kv:          "amenity/fast_food",
-	//   k:           "amenity",
-	//   v:           "fast_food",
-	//   n:           "Thaï Express",
-	//   d:           "(North America)",
-	//   nsimple:     "thaiexpress",
-	//   kvnnsimple:  "amenity/fast_food|thaiexpress"
-	// }
-	var to_parts = function (kvnd) {
-	  var parts = {};
-	  parts.kvnd = kvnd;
+	  function createIssue(crossing, graph) {
+	    // use the entities with the tags that define the feature type
+	    crossing.wayInfos.sort(function (way1Info, way2Info) {
+	      var type1 = way1Info.featureType;
+	      var type2 = way2Info.featureType;
 
-	  var kvndparts = kvnd.split('~', 2);
-	  if (kvndparts.length > 1) { parts.d = kvndparts[1]; }
+	      if (type1 === type2) {
+	        return utilDisplayLabel(way1Info.way, graph) > utilDisplayLabel(way2Info.way, graph);
+	      } else if (type1 === 'waterway') {
+	        return true;
+	      } else if (type2 === 'waterway') {
+	        return false;
+	      }
 
-	  parts.kvn = kvndparts[0];
-	  var kvnparts = parts.kvn.split('|', 2);
-	  if (kvnparts.length > 1) { parts.n = kvnparts[1]; }
+	      return type1 < type2;
+	    });
+	    var entities = crossing.wayInfos.map(function (wayInfo) {
+	      return getFeatureWithFeatureTypeTagsForWay(wayInfo.way, graph);
+	    });
+	    var edges = [crossing.wayInfos[0].edge, crossing.wayInfos[1].edge];
+	    var featureTypes = [crossing.wayInfos[0].featureType, crossing.wayInfos[1].featureType];
+	    var connectionTags = tagsForConnectionNodeIfAllowed(entities[0], entities[1], graph);
+	    var featureType1 = crossing.wayInfos[0].featureType;
+	    var featureType2 = crossing.wayInfos[1].featureType;
+	    var isCrossingIndoors = taggedAsIndoor(entities[0].tags) && taggedAsIndoor(entities[1].tags);
+	    var isCrossingTunnels = allowsTunnel(featureType1) && hasTag(entities[0].tags, 'tunnel') && allowsTunnel(featureType2) && hasTag(entities[1].tags, 'tunnel');
+	    var isCrossingBridges = allowsBridge(featureType1) && hasTag(entities[0].tags, 'bridge') && allowsBridge(featureType2) && hasTag(entities[1].tags, 'bridge');
+	    var subtype = [featureType1, featureType2].sort().join('-');
+	    var crossingTypeID = subtype;
+
+	    if (isCrossingIndoors) {
+	      crossingTypeID = 'indoor-indoor';
+	    } else if (isCrossingTunnels) {
+	      crossingTypeID = 'tunnel-tunnel';
+	    } else if (isCrossingBridges) {
+	      crossingTypeID = 'bridge-bridge';
+	    }
+
+	    if (connectionTags && (isCrossingIndoors || isCrossingTunnels || isCrossingBridges)) {
+	      crossingTypeID += '_connectable';
+	    } // Differentiate based on the loc rounded to 4 digits, since two ways can cross multiple times.
+
+
+	    var uniqueID = '' + crossing.crossPoint[0].toFixed(4) + ',' + crossing.crossPoint[1].toFixed(4);
+	    return new validationIssue({
+	      type: type,
+	      subtype: subtype,
+	      severity: 'warning',
+	      message: function message(context) {
+	        var graph = context.graph();
+	        var entity1 = graph.hasEntity(this.entityIds[0]),
+	            entity2 = graph.hasEntity(this.entityIds[1]);
+	        return entity1 && entity2 ? _t.html('issues.crossing_ways.message', {
+	          feature: utilDisplayLabel(entity1, graph),
+	          feature2: utilDisplayLabel(entity2, graph)
+	        }) : '';
+	      },
+	      reference: showReference,
+	      entityIds: entities.map(function (entity) {
+	        return entity.id;
+	      }),
+	      data: {
+	        edges: edges,
+	        featureTypes: featureTypes,
+	        connectionTags: connectionTags
+	      },
+	      hash: uniqueID,
+	      loc: crossing.crossPoint,
+	      dynamicFixes: function dynamicFixes(context) {
+	        var mode = context.mode();
+	        if (!mode || mode.id !== 'select' || mode.selectedIDs().length !== 1) return [];
+	        var selectedIndex = this.entityIds[0] === mode.selectedIDs()[0] ? 0 : 1;
+	        var selectedFeatureType = this.data.featureTypes[selectedIndex];
+	        var otherFeatureType = this.data.featureTypes[selectedIndex === 0 ? 1 : 0];
+	        var fixes = [];
 
-	  parts.kv = kvnparts[0];
-	  var kvparts = parts.kv.split('/', 2);
-	  parts.k = kvparts[0];
-	  parts.v = kvparts[1];
+	        if (connectionTags) {
+	          fixes.push(makeConnectWaysFix(this.data.connectionTags));
+	        }
 
-	  parts.nsimple = simplify(parts.n);
-	  parts.kvnsimple = parts.kv + '|' + parts.nsimple;
-	  return parts;
-	};
+	        if (isCrossingIndoors) {
+	          fixes.push(new validationIssueFix({
+	            icon: 'iD-icon-layers',
+	            title: _t.html('issues.fix.use_different_levels.title')
+	          }));
+	        } else if (isCrossingTunnels || isCrossingBridges || featureType1 === 'building' || featureType2 === 'building') {
+	          fixes.push(makeChangeLayerFix('higher'));
+	          fixes.push(makeChangeLayerFix('lower')); // can only add bridge/tunnel if both features are lines
+	        } else if (context.graph().geometry(this.entityIds[0]) === 'line' && context.graph().geometry(this.entityIds[1]) === 'line') {
+	          // don't recommend adding bridges to waterways since they're uncommon
+	          if (allowsBridge(selectedFeatureType) && selectedFeatureType !== 'waterway') {
+	            fixes.push(makeAddBridgeOrTunnelFix('add_a_bridge', 'temaki-bridge', 'bridge'));
+	          } // don't recommend adding tunnels under waterways since they're uncommon
 
-	var matchGroups = {adult_gaming_centre:["amenity/casino","amenity/gambling","leisure/adult_gaming_centre"],beauty:["shop/beauty","shop/hairdresser_supply"],bed:["shop/bed","shop/furniture"],beverages:["shop/alcohol","shop/beverages"],camping:["leisure/park","tourism/camp_site","tourism/caravan_site"],car_parts:["shop/car_parts","shop/car_repair","shop/tires","shop/tyres"],confectionery:["shop/candy","shop/chocolate","shop/confectionery"],convenience:["shop/beauty","shop/chemist","shop/convenience","shop/cosmetics","shop/newsagent"],coworking:["amenity/coworking_space","office/coworking","office/coworking_space"],electronics:["office/telecommunication","shop/computer","shop/electronics","shop/hifi","shop/mobile","shop/mobile_phone","shop/telecommunication"],fashion:["shop/accessories","shop/bag","shop/botique","shop/clothes","shop/department_store","shop/fashion","shop/fashion_accessories","shop/sports","shop/shoes"],financial:["amenity/bank","office/accountant","office/financial","office/financial_advisor","office/tax_advisor","shop/tax"],fitness:["leisure/fitness_centre","leisure/fitness_center","leisure/sports_centre","leisure/sports_center"],food:["amenity/cafe","amenity/fast_food","amenity/ice_cream","amenity/restaurant","shop/bakery","shop/ice_cream","shop/pastry","shop/tea","shop/coffee"],fuel:["amenity/fuel","shop/gas","shop/convenience;gas","shop/gas;convenience"],gift:["shop/gift","shop/card","shop/cards","shop/stationery"],hardware:["shop/carpet","shop/diy","shop/doityourself","shop/doors","shop/electrical","shop/flooring","shop/hardware","shop/power_tools","shop/tool_hire","shop/tools","shop/trade"],health_food:["shop/health","shop/health_food","shop/herbalist","shop/nutrition_supplements"],houseware:["shop/houseware","shop/interior_decoration"],lodging:["tourism/hotel","tourism/motel"],money_transfer:["amenity/money_transfer","shop/money_transfer"],outdoor:["shop/outdoor","shop/sports"],rental:["amenity/bicycle_rental","amenity/boat_rental","amenity/car_rental","amenity/truck_rental","amenity/vehicle_rental","shop/rental"],school:["amenity/childcare","amenity/college","amenity/kindergarten","amenity/language_school","amenity/prep_school","amenity/school","amenity/university"],supermarket:["shop/food","shop/frozen_food","shop/greengrocer","shop/grocery","shop/supermarket","shop/wholesale"],variety_store:["shop/variety_store","shop/supermarket","shop/discount","shop/convenience"],vending:["amenity/vending_machine","shop/vending_machine"],wholesale:["shop/wholesale","shop/supermarket","shop/department_store"]};
-	var require$$0 = {
-	matchGroups: matchGroups
-	};
 
-	var matchGroups$1 = require$$0.matchGroups;
+	          var skipTunnelFix = otherFeatureType === 'waterway' && selectedFeatureType !== 'waterway';
 
+	          if (allowsTunnel(selectedFeatureType) && !skipTunnelFix) {
+	            fixes.push(makeAddBridgeOrTunnelFix('add_a_tunnel', 'temaki-tunnel', 'tunnel'));
+	          }
+	        } // repositioning the features is always an option
 
-	var matcher$1 = function () {
-	  var _warnings = [];  // array of match conflict pairs
-	  var _ambiguous = {};
-	  var _matchIndex = {};
-	  var matcher = {};
 
+	        fixes.push(new validationIssueFix({
+	          icon: 'iD-operation-move',
+	          title: _t.html('issues.fix.reposition_features.title')
+	        }));
+	        return fixes;
+	      }
+	    });
 
-	  // Create an index of all the keys/simplenames for fast matching
-	  matcher.buildMatchIndex = function (brands) {
-	    // two passes - once for primary names, once for secondary/alternate names
-	    Object.keys(brands).forEach(function (kvnd) { return insertNames(kvnd, 'primary'); });
-	    Object.keys(brands).forEach(function (kvnd) { return insertNames(kvnd, 'secondary'); });
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.crossing_ways.' + crossingTypeID + '.reference'));
+	    }
+	  }
 
+	  function makeAddBridgeOrTunnelFix(fixTitleID, iconName, bridgeOrTunnel) {
+	    return new validationIssueFix({
+	      icon: iconName,
+	      title: _t.html('issues.fix.' + fixTitleID + '.title'),
+	      onClick: function onClick(context) {
+	        var mode = context.mode();
+	        if (!mode || mode.id !== 'select') return;
+	        var selectedIDs = mode.selectedIDs();
+	        if (selectedIDs.length !== 1) return;
+	        var selectedWayID = selectedIDs[0];
+	        if (!context.hasEntity(selectedWayID)) return;
+	        var resultWayIDs = [selectedWayID];
+	        var edge, crossedEdge, crossedWayID;
+
+	        if (this.issue.entityIds[0] === selectedWayID) {
+	          edge = this.issue.data.edges[0];
+	          crossedEdge = this.issue.data.edges[1];
+	          crossedWayID = this.issue.entityIds[1];
+	        } else {
+	          edge = this.issue.data.edges[1];
+	          crossedEdge = this.issue.data.edges[0];
+	          crossedWayID = this.issue.entityIds[0];
+	        }
 
-	    function insertNames(kvnd, which) {
-	      var obj = brands[kvnd];
-	      var parts = to_parts(kvnd);
+	        var crossingLoc = this.issue.loc;
+	        var projection = context.projection;
 
-	      // Exit early for ambiguous names in the second pass.
-	      // They were collected in the first pass and we don't gather alt names for them.
-	      if (which === 'secondary' && parts.d) { return; }
+	        var action = function actionAddStructure(graph) {
+	          var edgeNodes = [graph.entity(edge[0]), graph.entity(edge[1])];
+	          var crossedWay = graph.hasEntity(crossedWayID); // use the explicit width of the crossed feature as the structure length, if available
 
+	          var structLengthMeters = crossedWay && crossedWay.tags.width && parseFloat(crossedWay.tags.width);
 
-	      if (obj.countryCodes) {
-	        parts.countryCodes = obj.countryCodes.slice();  // copy
-	      }
+	          if (!structLengthMeters) {
+	            // if no explicit width is set, approximate the width based on the tags
+	            structLengthMeters = crossedWay && crossedWay.impliedLineWidthMeters();
+	          }
 
-	      var nomatches = (obj.nomatch || []);
-	      if (nomatches.some(function (s) { return s === kvnd; })) {
-	        console.log(("WARNING match/nomatch conflict for " + kvnd));
-	        return;
-	      }
+	          if (structLengthMeters) {
+	            if (getFeatureType(crossedWay, graph) === 'railway') {
+	              // bridges over railways are generally much longer than the rail bed itself, compensate
+	              structLengthMeters *= 2;
+	            }
+	          } else {
+	            // should ideally never land here since all rail/water/road tags should have an implied width
+	            structLengthMeters = 8;
+	          }
 
-	      var match_kv = [parts.kv]
-	        .concat(obj.matchTags || [])
-	        .concat([((parts.k) + "/yes"), "building/yes"])   // #3454 - match some generic tags
-	        .map(function (s) { return s.toLowerCase(); });
+	          var a1 = geoAngle(edgeNodes[0], edgeNodes[1], projection) + Math.PI;
+	          var a2 = geoAngle(graph.entity(crossedEdge[0]), graph.entity(crossedEdge[1]), projection) + Math.PI;
+	          var crossingAngle = Math.max(a1, a2) - Math.min(a1, a2);
+	          if (crossingAngle > Math.PI) crossingAngle -= Math.PI; // lengthen the structure to account for the angle of the crossing
 
-	      var match_nsimple = [];
-	      if (which === 'primary') {
-	        match_nsimple = [parts.n]
-	          .concat(obj.matchNames || [])
-	          .concat(obj.tags.official_name || [])   // #2732 - match alternate names
-	          .map(simplify);
+	          structLengthMeters = structLengthMeters / 2 / Math.sin(crossingAngle) * 2; // add padding since the structure must extend past the edges of the crossed feature
 
-	      } else if (which === 'secondary') {
-	        match_nsimple = []
-	          .concat(obj.tags.alt_name || [])        // #2732 - match alternate names
-	          .concat(obj.tags.short_name || [])      // #2732 - match alternate names
-	          .map(simplify);
-	      }
+	          structLengthMeters += 4; // clamp the length to a reasonable range
 
-	      if (!match_nsimple.length) { return; }  // nothing to do
+	          structLengthMeters = Math.min(Math.max(structLengthMeters, 4), 50);
 
-	      match_kv.forEach(function (kv) {
-	        match_nsimple.forEach(function (nsimple) {
-	          if (parts.d) {
-	            // Known ambiguous names with disambiguation string ~(USA) / ~(Canada)
-	            // FIXME: Name collisions will overwrite the initial entry (ok for now)
-	            if (!_ambiguous[kv]) { _ambiguous[kv] = {}; }
-	            _ambiguous[kv][nsimple] = parts;
+	          function geomToProj(geoPoint) {
+	            return [geoLonToMeters(geoPoint[0], geoPoint[1]), geoLatToMeters(geoPoint[1])];
+	          }
 
-	          } else {
-	            // Names we mostly expect to be unique..
-	            if (!_matchIndex[kv]) { _matchIndex[kv] = {}; }
-
-	            var m = _matchIndex[kv][nsimple];
-	            if (m) {  // There already is a match for this name, skip it
-	              // Warn if we detect collisions in a primary name.
-	              // Skip warning if a secondary name or a generic `*=yes` tag - #2972 / #3454
-	              if (which === 'primary' && !/\/yes$/.test(kv)) {
-	                _warnings.push([m.kvnd, (kvnd + " (" + kv + "/" + nsimple + ")")]);
-	              }
-	            } else {
-	              _matchIndex[kv][nsimple] = parts;   // insert
-	            }
+	          function projToGeom(projPoint) {
+	            var lat = geoMetersToLat(projPoint[1]);
+	            return [geoMetersToLon(projPoint[0], lat), lat];
 	          }
-	        });
-	      });
 
-	    }
-	  };
+	          var projEdgeNode1 = geomToProj(edgeNodes[0].loc);
+	          var projEdgeNode2 = geomToProj(edgeNodes[1].loc);
+	          var projectedAngle = geoVecAngle(projEdgeNode1, projEdgeNode2);
+	          var projectedCrossingLoc = geomToProj(crossingLoc);
+	          var linearToSphericalMetersRatio = geoVecLength(projEdgeNode1, projEdgeNode2) / geoSphericalDistance(edgeNodes[0].loc, edgeNodes[1].loc);
 
+	          function locSphericalDistanceFromCrossingLoc(angle, distanceMeters) {
+	            var lengthSphericalMeters = distanceMeters * linearToSphericalMetersRatio;
+	            return projToGeom([projectedCrossingLoc[0] + Math.cos(angle) * lengthSphericalMeters, projectedCrossingLoc[1] + Math.sin(angle) * lengthSphericalMeters]);
+	          }
 
-	  // pass a `key`, `value`, `name` and return the best match,
-	  // `countryCode` optional (if supplied, must match that too)
-	  matcher.matchKVN = function (key, value, name, countryCode) {
-	    return matcher.matchParts(to_parts((key + "/" + value + "|" + name)), countryCode);
-	  };
+	          var endpointLocGetter1 = function endpointLocGetter1(lengthMeters) {
+	            return locSphericalDistanceFromCrossingLoc(projectedAngle, lengthMeters);
+	          };
 
+	          var endpointLocGetter2 = function endpointLocGetter2(lengthMeters) {
+	            return locSphericalDistanceFromCrossingLoc(projectedAngle + Math.PI, lengthMeters);
+	          }; // avoid creating very short edges from splitting too close to another node
 
-	  // pass a parts object and return the best match,
-	  // `countryCode` optional (if supplied, must match that too)
-	  matcher.matchParts = function (parts, countryCode) {
-	    var match = null;
-	    var inGroup = false;
 
-	    // fixme: we currently return a single match for ambiguous
-	    match = _ambiguous[parts.kv] && _ambiguous[parts.kv][parts.nsimple];
-	    if (match && matchesCountryCode(match)) { return match; }
+	          var minEdgeLengthMeters = 0.55; // decide where to bound the structure along the way, splitting as necessary
 
-	    // try to return an exact match
-	    match = _matchIndex[parts.kv] && _matchIndex[parts.kv][parts.nsimple];
-	    if (match && matchesCountryCode(match)) { return match; }
+	          function determineEndpoint(edge, endNode, locGetter) {
+	            var newNode;
+	            var idealLengthMeters = structLengthMeters / 2; // distance between the crossing location and the end of the edge,
+	            // the maximum length of this side of the structure
 
-	    // look in match groups
-	    for (var mg in matchGroups$1) {
-	      var matchGroup = matchGroups$1[mg];
-	      match = null;
-	      inGroup = false;
+	            var crossingToEdgeEndDistance = geoSphericalDistance(crossingLoc, endNode.loc);
 
-	      for (var i = 0; i < matchGroup.length; i++) {
-	        var otherkv = matchGroup[i].toLowerCase();
-	        if (!inGroup) {
-	          inGroup = otherkv === parts.kv;
-	        }
-	        if (!match) {
-	          // fixme: we currently return a single match for ambiguous
-	          match = _ambiguous[otherkv] && _ambiguous[otherkv][parts.nsimple];
-	        }
-	        if (!match) {
-	          match = _matchIndex[otherkv] && _matchIndex[otherkv][parts.nsimple];
-	        }
+	            if (crossingToEdgeEndDistance - idealLengthMeters > minEdgeLengthMeters) {
+	              // the edge is long enough to insert a new node
+	              // the loc that would result in the full expected length
+	              var idealNodeLoc = locGetter(idealLengthMeters);
+	              newNode = osmNode();
+	              graph = actionAddMidpoint({
+	                loc: idealNodeLoc,
+	                edge: edge
+	              }, newNode)(graph);
+	            } else {
+	              var edgeCount = 0;
+	              endNode.parentIntersectionWays(graph).forEach(function (way) {
+	                way.nodes.forEach(function (nodeID) {
+	                  if (nodeID === endNode.id) {
+	                    if (endNode.id === way.first() && endNode.id !== way.last() || endNode.id === way.last() && endNode.id !== way.first()) {
+	                      edgeCount += 1;
+	                    } else {
+	                      edgeCount += 2;
+	                    }
+	                  }
+	                });
+	              });
 
-	        if (match && !matchesCountryCode(match)) {
-	          match = null;
-	        }
+	              if (edgeCount >= 3) {
+	                // the end node is a junction, try to leave a segment
+	                // between it and the structure - #7202
+	                var insetLength = crossingToEdgeEndDistance - minEdgeLengthMeters;
+
+	                if (insetLength > minEdgeLengthMeters) {
+	                  var insetNodeLoc = locGetter(insetLength);
+	                  newNode = osmNode();
+	                  graph = actionAddMidpoint({
+	                    loc: insetNodeLoc,
+	                    edge: edge
+	                  }, newNode)(graph);
+	                }
+	              }
+	            } // if the edge is too short to subdivide as desired, then
+	            // just bound the structure at the existing end node
 
-	        if (inGroup && match) {
-	          return match;
-	        }
-	      }
-	    }
 
-	    return null;
+	            if (!newNode) newNode = endNode;
+	            var splitAction = actionSplit([newNode.id]).limitWays(resultWayIDs); // only split selected or created ways
+	            // do the split
 
-	    function matchesCountryCode(match) {
-	      if (!countryCode) { return true; }
-	      if (!match.countryCodes) { return true; }
-	      return match.countryCodes.indexOf(countryCode) !== -1;
-	    }
-	  };
+	            graph = splitAction(graph);
 
+	            if (splitAction.getCreatedWayIDs().length) {
+	              resultWayIDs.push(splitAction.getCreatedWayIDs()[0]);
+	            }
 
-	  matcher.getWarnings = function () { return _warnings; };
+	            return newNode;
+	          }
 
-	  return matcher;
-	};
+	          var structEndNode1 = determineEndpoint(edge, edgeNodes[1], endpointLocGetter1);
+	          var structEndNode2 = determineEndpoint([edgeNodes[0].id, structEndNode1.id], edgeNodes[0], endpointLocGetter2);
+	          var structureWay = resultWayIDs.map(function (id) {
+	            return graph.entity(id);
+	          }).find(function (way) {
+	            return way.nodes.indexOf(structEndNode1.id) !== -1 && way.nodes.indexOf(structEndNode2.id) !== -1;
+	          });
+	          var tags = Object.assign({}, structureWay.tags); // copy tags
 
-	var quickselect$1 = createCommonjsModule(function (module, exports) {
-	(function (global, factory) {
-		 module.exports = factory() ;
-	}(commonjsGlobal, (function () {
-	function quickselect(arr, k, left, right, compare) {
-	    quickselectStep(arr, k, left || 0, right || (arr.length - 1), compare || defaultCompare);
-	}
+	          if (bridgeOrTunnel === 'bridge') {
+	            tags.bridge = 'yes';
+	            tags.layer = '1';
+	          } else {
+	            var tunnelValue = 'yes';
 
-	function quickselectStep(arr, k, left, right, compare) {
+	            if (getFeatureType(structureWay, graph) === 'waterway') {
+	              // use `tunnel=culvert` for waterways by default
+	              tunnelValue = 'culvert';
+	            }
 
-	    while (right > left) {
-	        if (right - left > 600) {
-	            var n = right - left + 1;
-	            var m = k - left + 1;
-	            var z = Math.log(n);
-	            var s = 0.5 * Math.exp(2 * z / 3);
-	            var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
-	            var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
-	            var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
-	            quickselectStep(arr, k, newLeft, newRight, compare);
-	        }
+	            tags.tunnel = tunnelValue;
+	            tags.layer = '-1';
+	          } // apply the structure tags to the way
 
-	        var t = arr[k];
-	        var i = left;
-	        var j = right;
 
-	        swap(arr, left, k);
-	        if (compare(arr[right], t) > 0) { swap(arr, left, right); }
+	          graph = actionChangeTags(structureWay.id, tags)(graph);
+	          return graph;
+	        };
 
-	        while (i < j) {
-	            swap(arr, i, j);
-	            i++;
-	            j--;
-	            while (compare(arr[i], t) < 0) { i++; }
-	            while (compare(arr[j], t) > 0) { j--; }
-	        }
+	        context.perform(action, _t('issues.fix.' + fixTitleID + '.annotation'));
+	        context.enter(modeSelect(context, resultWayIDs));
+	      }
+	    });
+	  }
 
-	        if (compare(arr[left], t) === 0) { swap(arr, left, j); }
-	        else {
-	            j++;
-	            swap(arr, j, right);
-	        }
+	  function makeConnectWaysFix(connectionTags) {
+	    var fixTitleID = 'connect_features';
 
-	        if (j <= k) { left = j + 1; }
-	        if (k <= j) { right = j - 1; }
+	    if (connectionTags.ford) {
+	      fixTitleID = 'connect_using_ford';
 	    }
-	}
 
-	function swap(arr, i, j) {
-	    var tmp = arr[i];
-	    arr[i] = arr[j];
-	    arr[j] = tmp;
-	}
+	    return new validationIssueFix({
+	      icon: 'iD-icon-crossing',
+	      title: _t.html('issues.fix.' + fixTitleID + '.title'),
+	      onClick: function onClick(context) {
+	        var loc = this.issue.loc;
+	        var connectionTags = this.issue.data.connectionTags;
+	        var edges = this.issue.data.edges;
+	        context.perform(function actionConnectCrossingWays(graph) {
+	          // create the new node for the points
+	          var node = osmNode({
+	            loc: loc,
+	            tags: connectionTags
+	          });
+	          graph = graph.replace(node);
+	          var nodesToMerge = [node.id];
+	          var mergeThresholdInMeters = 0.75;
+	          edges.forEach(function (edge) {
+	            var edgeNodes = [graph.entity(edge[0]), graph.entity(edge[1])];
+	            var nearby = geoSphericalClosestNode(edgeNodes, loc); // if there is already a suitable node nearby, use that
+	            // use the node if node has no interesting tags or if it is a crossing node #8326
+
+	            if ((!nearby.node.hasInterestingTags() || nearby.node.isCrossing()) && nearby.distance < mergeThresholdInMeters) {
+	              nodesToMerge.push(nearby.node.id); // else add the new node to the way
+	            } else {
+	              graph = actionAddMidpoint({
+	                loc: loc,
+	                edge: edge
+	              }, node)(graph);
+	            }
+	          });
 
-	function defaultCompare(a, b) {
-	    return a < b ? -1 : a > b ? 1 : 0;
-	}
+	          if (nodesToMerge.length > 1) {
+	            // if we're using nearby nodes, merge them with the new node
+	            graph = actionMergeNodes(nodesToMerge, loc)(graph);
+	          }
 
-	return quickselect;
+	          return graph;
+	        }, _t('issues.fix.connect_crossing_features.annotation'));
+	      }
+	    });
+	  }
 
-	})));
-	});
+	  function makeChangeLayerFix(higherOrLower) {
+	    return new validationIssueFix({
+	      icon: 'iD-icon-' + (higherOrLower === 'higher' ? 'up' : 'down'),
+	      title: _t.html('issues.fix.tag_this_as_' + higherOrLower + '.title'),
+	      onClick: function onClick(context) {
+	        var mode = context.mode();
+	        if (!mode || mode.id !== 'select') return;
+	        var selectedIDs = mode.selectedIDs();
+	        if (selectedIDs.length !== 1) return;
+	        var selectedID = selectedIDs[0];
+	        if (!this.issue.entityIds.some(function (entityId) {
+	          return entityId === selectedID;
+	        })) return;
+	        var entity = context.hasEntity(selectedID);
+	        if (!entity) return;
+	        var tags = Object.assign({}, entity.tags); // shallow copy
+
+	        var layer = tags.layer && Number(tags.layer);
+
+	        if (layer && !isNaN(layer)) {
+	          if (higherOrLower === 'higher') {
+	            layer += 1;
+	          } else {
+	            layer -= 1;
+	          }
+	        } else {
+	          if (higherOrLower === 'higher') {
+	            layer = 1;
+	          } else {
+	            layer = -1;
+	          }
+	        }
 
-	var rbush_1 = rbush;
-	var _default$2 = rbush;
+	        tags.layer = layer.toString();
+	        context.perform(actionChangeTags(entity.id, tags), _t('operations.change_tags.annotation'));
+	      }
+	    });
+	  }
 
+	  validation.type = type;
+	  return validation;
+	}
 
+	function behaviorDrawWay(context, wayID, mode, startGraph) {
+	  var keybinding = utilKeybinding('drawWay');
+	  var dispatch = dispatch$8('rejectedSelfIntersection');
+	  var behavior = behaviorDraw(context); // Must be set by `drawWay.nodeIndex` before each install of this behavior.
 
-	function rbush(maxEntries, format) {
-	    if (!(this instanceof rbush)) { return new rbush(maxEntries, format); }
+	  var _nodeIndex;
 
-	    // max entries in a node is 9 by default; min node fill is 40% for best performance
-	    this._maxEntries = Math.max(4, maxEntries || 9);
-	    this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
+	  var _origWay;
 
-	    if (format) {
-	        this._initFormat(format);
-	    }
+	  var _wayGeometry;
 
-	    this.clear();
-	}
+	  var _headNodeID;
 
-	rbush.prototype = {
+	  var _annotation;
 
-	    all: function () {
-	        return this._all(this.data, []);
-	    },
+	  var _pointerHasMoved = false; // The osmNode to be placed.
+	  // This is temporary and just follows the mouse cursor until an "add" event occurs.
 
-	    search: function (bbox) {
+	  var _drawNode;
 
-	        var node = this.data,
-	            result = [],
-	            toBBox = this.toBBox;
+	  var _didResolveTempEdit = false;
 
-	        if (!intersects$1(bbox, node)) { return result; }
+	  function createDrawNode(loc) {
+	    // don't make the draw node until we actually need it
+	    _drawNode = osmNode({
+	      loc: loc
+	    });
+	    context.pauseChangeDispatch();
+	    context.replace(function actionAddDrawNode(graph) {
+	      // add the draw node to the graph and insert it into the way
+	      var way = graph.entity(wayID);
+	      return graph.replace(_drawNode).replace(way.addNode(_drawNode.id, _nodeIndex));
+	    }, _annotation);
+	    context.resumeChangeDispatch();
+	    setActiveElements();
+	  }
+
+	  function removeDrawNode() {
+	    context.pauseChangeDispatch();
+	    context.replace(function actionDeleteDrawNode(graph) {
+	      var way = graph.entity(wayID);
+	      return graph.replace(way.removeNode(_drawNode.id)).remove(_drawNode);
+	    }, _annotation);
+	    _drawNode = undefined;
+	    context.resumeChangeDispatch();
+	  }
+
+	  function keydown(d3_event) {
+	    if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      if (context.surface().classed('nope')) {
+	        context.surface().classed('nope-suppressed', true);
+	      }
 
-	        var nodesToSearch = [],
-	            i, len, child, childBBox;
+	      context.surface().classed('nope', false).classed('nope-disabled', true);
+	    }
+	  }
 
-	        while (node) {
-	            for (i = 0, len = node.children.length; i < len; i++) {
+	  function keyup(d3_event) {
+	    if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      if (context.surface().classed('nope-suppressed')) {
+	        context.surface().classed('nope', true);
+	      }
 
-	                child = node.children[i];
-	                childBBox = node.leaf ? toBBox(child) : child;
+	      context.surface().classed('nope-suppressed', false).classed('nope-disabled', false);
+	    }
+	  }
 
-	                if (intersects$1(bbox, childBBox)) {
-	                    if (node.leaf) { result.push(child); }
-	                    else if (contains$2(bbox, childBBox)) { this._all(child, result); }
-	                    else { nodesToSearch.push(child); }
-	                }
-	            }
-	            node = nodesToSearch.pop();
-	        }
+	  function allowsVertex(d) {
+	    return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
+	  } // related code
+	  // - `mode/drag_node.js`     `doMove()`
+	  // - `behavior/draw.js`      `click()`
+	  // - `behavior/draw_way.js`  `move()`
 
-	        return result;
-	    },
 
-	    collides: function (bbox) {
+	  function move(d3_event, datum) {
+	    var loc = context.map().mouseCoordinates();
+	    if (!_drawNode) createDrawNode(loc);
+	    context.surface().classed('nope-disabled', d3_event.altKey);
+	    var targetLoc = datum && datum.properties && datum.properties.entity && allowsVertex(datum.properties.entity) && datum.properties.entity.loc;
+	    var targetNodes = datum && datum.properties && datum.properties.nodes;
 
-	        var node = this.data,
-	            toBBox = this.toBBox;
+	    if (targetLoc) {
+	      // snap to node/vertex - a point target with `.loc`
+	      loc = targetLoc;
+	    } else if (targetNodes) {
+	      // snap to way - a line target with `.nodes`
+	      var choice = geoChooseEdge(targetNodes, context.map().mouse(), context.projection, _drawNode.id);
 
-	        if (!intersects$1(bbox, node)) { return false; }
+	      if (choice) {
+	        loc = choice.loc;
+	      }
+	    }
 
-	        var nodesToSearch = [],
-	            i, len, child, childBBox;
+	    context.replace(actionMoveNode(_drawNode.id, loc), _annotation);
+	    _drawNode = context.entity(_drawNode.id);
+	    checkGeometry(true
+	    /* includeDrawNode */
+	    );
+	  } // Check whether this edit causes the geometry to break.
+	  // If so, class the surface with a nope cursor.
+	  // `includeDrawNode` - Only check the relevant line segments if finishing drawing
 
-	        while (node) {
-	            for (i = 0, len = node.children.length; i < len; i++) {
 
-	                child = node.children[i];
-	                childBBox = node.leaf ? toBBox(child) : child;
+	  function checkGeometry(includeDrawNode) {
+	    var nopeDisabled = context.surface().classed('nope-disabled');
+	    var isInvalid = isInvalidGeometry(includeDrawNode);
 
-	                if (intersects$1(bbox, childBBox)) {
-	                    if (node.leaf || contains$2(bbox, childBBox)) { return true; }
-	                    nodesToSearch.push(child);
-	                }
-	            }
-	            node = nodesToSearch.pop();
-	        }
+	    if (nopeDisabled) {
+	      context.surface().classed('nope', false).classed('nope-suppressed', isInvalid);
+	    } else {
+	      context.surface().classed('nope', isInvalid).classed('nope-suppressed', false);
+	    }
+	  }
 
-	        return false;
-	    },
+	  function isInvalidGeometry(includeDrawNode) {
+	    var testNode = _drawNode; // we only need to test the single way we're drawing
 
-	    load: function (data) {
-	        if (!(data && data.length)) { return this; }
+	    var parentWay = context.graph().entity(wayID);
+	    var nodes = context.graph().childNodes(parentWay).slice(); // shallow copy
 
-	        if (data.length < this._minEntries) {
-	            for (var i = 0, len = data.length; i < len; i++) {
-	                this.insert(data[i]);
-	            }
-	            return this;
-	        }
+	    if (includeDrawNode) {
+	      if (parentWay.isClosed()) {
+	        // don't test the last segment for closed ways - #4655
+	        // (still test the first segment)
+	        nodes.pop();
+	      }
+	    } else {
+	      // discount the draw node
+	      if (parentWay.isClosed()) {
+	        if (nodes.length < 3) return false;
+	        if (_drawNode) nodes.splice(-2, 1);
+	        testNode = nodes[nodes.length - 2];
+	      } else {
+	        // there's nothing we need to test if we ignore the draw node on open ways
+	        return false;
+	      }
+	    }
 
-	        // recursively build the tree with the given data from scratch using OMT algorithm
-	        var node = this._build(data.slice(), 0, data.length - 1, 0);
+	    return testNode && geoHasSelfIntersections(nodes, testNode.id);
+	  }
 
-	        if (!this.data.children.length) {
-	            // save as is if tree is empty
-	            this.data = node;
+	  function undone() {
+	    // undoing removed the temp edit
+	    _didResolveTempEdit = true;
+	    context.pauseChangeDispatch();
+	    var nextMode;
 
-	        } else if (this.data.height === node.height) {
-	            // split root if trees have the same height
-	            this._splitRoot(this.data, node);
+	    if (context.graph() === startGraph) {
+	      // We've undone back to the initial state before we started drawing.
+	      // Just exit the draw mode without undoing whatever we did before
+	      // we entered the draw mode.
+	      nextMode = modeSelect(context, [wayID]);
+	    } else {
+	      // The `undo` only removed the temporary edit, so here we have to
+	      // manually undo to actually remove the last node we added. We can't
+	      // use the `undo` function since the initial "add" graph doesn't have
+	      // an annotation and so cannot be undone to.
+	      context.pop(1); // continue drawing
 
-	        } else {
-	            if (this.data.height < node.height) {
-	                // swap trees if inserted one is bigger
-	                var tmpNode = this.data;
-	                this.data = node;
-	                node = tmpNode;
-	            }
+	      nextMode = mode;
+	    } // clear the redo stack by adding and removing a blank edit
 
-	            // insert the small tree into the large tree at appropriate level
-	            this._insert(node, this.data.height - node.height - 1, true);
-	        }
 
-	        return this;
-	    },
+	    context.perform(actionNoop());
+	    context.pop(1);
+	    context.resumeChangeDispatch();
+	    context.enter(nextMode);
+	  }
 
-	    insert: function (item) {
-	        if (item) { this._insert(item, this.data.height - 1); }
-	        return this;
-	    },
+	  function setActiveElements() {
+	    if (!_drawNode) return;
+	    context.surface().selectAll('.' + _drawNode.id).classed('active', true);
+	  }
 
-	    clear: function () {
-	        this.data = createNode$1([]);
-	        return this;
-	    },
+	  function resetToStartGraph() {
+	    while (context.graph() !== startGraph) {
+	      context.pop();
+	    }
+	  }
 
-	    remove: function (item, equalsFn) {
-	        if (!item) { return this; }
+	  var drawWay = function drawWay(surface) {
+	    _drawNode = undefined;
+	    _didResolveTempEdit = false;
+	    _origWay = context.entity(wayID);
 
-	        var node = this.data,
-	            bbox = this.toBBox(item),
-	            path = [],
-	            indexes = [],
-	            i, parent, index, goingUp;
+	    if (typeof _nodeIndex === 'number') {
+	      _headNodeID = _origWay.nodes[_nodeIndex];
+	    } else if (_origWay.isClosed()) {
+	      _headNodeID = _origWay.nodes[_origWay.nodes.length - 2];
+	    } else {
+	      _headNodeID = _origWay.nodes[_origWay.nodes.length - 1];
+	    }
+
+	    _wayGeometry = _origWay.geometry(context.graph());
+	    _annotation = _t((_origWay.nodes.length === (_origWay.isClosed() ? 2 : 1) ? 'operations.start.annotation.' : 'operations.continue.annotation.') + _wayGeometry);
+	    _pointerHasMoved = false; // Push an annotated state for undo to return back to.
+	    // We must make sure to replace or remove it later.
+
+	    context.pauseChangeDispatch();
+	    context.perform(actionNoop(), _annotation);
+	    context.resumeChangeDispatch();
+	    behavior.hover().initialNodeID(_headNodeID);
+	    behavior.on('move', function () {
+	      _pointerHasMoved = true;
+	      move.apply(this, arguments);
+	    }).on('down', function () {
+	      move.apply(this, arguments);
+	    }).on('downcancel', function () {
+	      if (_drawNode) removeDrawNode();
+	    }).on('click', drawWay.add).on('clickWay', drawWay.addWay).on('clickNode', drawWay.addNode).on('undo', context.undo).on('cancel', drawWay.cancel).on('finish', drawWay.finish);
+	    select(window).on('keydown.drawWay', keydown).on('keyup.drawWay', keyup);
+	    context.map().dblclickZoomEnable(false).on('drawn.draw', setActiveElements);
+	    setActiveElements();
+	    surface.call(behavior);
+	    context.history().on('undone.draw', undone);
+	  };
+
+	  drawWay.off = function (surface) {
+	    if (!_didResolveTempEdit) {
+	      // Drawing was interrupted unexpectedly.
+	      // This can happen if the user changes modes,
+	      // clicks geolocate button, a hashchange event occurs, etc.
+	      context.pauseChangeDispatch();
+	      resetToStartGraph();
+	      context.resumeChangeDispatch();
+	    }
+
+	    _drawNode = undefined;
+	    _nodeIndex = undefined;
+	    context.map().on('drawn.draw', null);
+	    surface.call(behavior.off).selectAll('.active').classed('active', false);
+	    surface.classed('nope', false).classed('nope-suppressed', false).classed('nope-disabled', false);
+	    select(window).on('keydown.drawWay', null).on('keyup.drawWay', null);
+	    context.history().on('undone.draw', null);
+	  };
+
+	  function attemptAdd(d, loc, doAdd) {
+	    if (_drawNode) {
+	      // move the node to the final loc in case move wasn't called
+	      // consistently (e.g. on touch devices)
+	      context.replace(actionMoveNode(_drawNode.id, loc), _annotation);
+	      _drawNode = context.entity(_drawNode.id);
+	    } else {
+	      createDrawNode(loc);
+	    }
 
-	        // depth-first iterative tree traversal
-	        while (node || path.length) {
+	    checkGeometry(true
+	    /* includeDrawNode */
+	    );
 
-	            if (!node) { // go up
-	                node = path.pop();
-	                parent = path[path.length - 1];
-	                i = indexes.pop();
-	                goingUp = true;
-	            }
+	    if (d && d.properties && d.properties.nope || context.surface().classed('nope')) {
+	      if (!_pointerHasMoved) {
+	        // prevent the temporary draw node from appearing on touch devices
+	        removeDrawNode();
+	      }
 
-	            if (node.leaf) { // check current node
-	                index = findItem$1(item, node.children, equalsFn);
+	      dispatch.call('rejectedSelfIntersection', this);
+	      return; // can't click here
+	    }
 
-	                if (index !== -1) {
-	                    // item found, remove the item and condense tree upwards
-	                    node.children.splice(index, 1);
-	                    path.push(node);
-	                    this._condense(path);
-	                    return this;
-	                }
-	            }
+	    context.pauseChangeDispatch();
+	    doAdd(); // we just replaced the temporary edit with the real one
 
-	            if (!goingUp && !node.leaf && contains$2(node, bbox)) { // go down
-	                path.push(node);
-	                indexes.push(i);
-	                i = 0;
-	                parent = node;
-	                node = node.children[0];
+	    _didResolveTempEdit = true;
+	    context.resumeChangeDispatch();
+	    context.enter(mode);
+	  } // Accept the current position of the drawing node
 
-	            } else if (parent) { // go right
-	                i++;
-	                node = parent.children[i];
-	                goingUp = false;
 
-	            } else { node = null; } // nothing found
-	        }
+	  drawWay.add = function (loc, d) {
+	    attemptAdd(d, loc, function () {// don't need to do anything extra
+	    });
+	  }; // Connect the way to an existing way
 
-	        return this;
-	    },
 
-	    toBBox: function (item) { return item; },
+	  drawWay.addWay = function (loc, edge, d) {
+	    attemptAdd(d, loc, function () {
+	      context.replace(actionAddMidpoint({
+	        loc: loc,
+	        edge: edge
+	      }, _drawNode), _annotation);
+	    });
+	  }; // Connect the way to an existing node
 
-	    compareMinX: compareNodeMinX$1,
-	    compareMinY: compareNodeMinY$1,
 
-	    toJSON: function () { return this.data; },
+	  drawWay.addNode = function (node, d) {
+	    // finish drawing if the mapper targets the prior node
+	    if (node.id === _headNodeID || // or the first node when drawing an area
+	    _origWay.isClosed() && node.id === _origWay.first()) {
+	      drawWay.finish();
+	      return;
+	    }
 
-	    fromJSON: function (data) {
-	        this.data = data;
-	        return this;
-	    },
+	    attemptAdd(d, node.loc, function () {
+	      context.replace(function actionReplaceDrawNode(graph) {
+	        // remove the temporary draw node and insert the existing node
+	        // at the same index
+	        graph = graph.replace(graph.entity(wayID).removeNode(_drawNode.id)).remove(_drawNode);
+	        return graph.replace(graph.entity(wayID).addNode(node.id, _nodeIndex));
+	      }, _annotation);
+	    });
+	  };
+	  /**
+	   * @param {(typeof osmWay)[]} ways
+	   * @returns {"line" | "area" | "generic"}
+	   */
 
-	    _all: function (node, result) {
-	        var nodesToSearch = [];
-	        while (node) {
-	            if (node.leaf) { result.push.apply(result, node.children); }
-	            else { nodesToSearch.push.apply(nodesToSearch, node.children); }
 
-	            node = nodesToSearch.pop();
-	        }
-	        return result;
-	    },
+	  function getFeatureType(ways) {
+	    if (ways.every(function (way) {
+	      return way.isClosed();
+	    })) return 'area';
+	    if (ways.every(function (way) {
+	      return !way.isClosed();
+	    })) return 'line';
+	    return 'generic';
+	  }
+	  /** see PR #8671 */
 
-	    _build: function (items, left, right, height) {
 
-	        var N = right - left + 1,
-	            M = this._maxEntries,
-	            node;
+	  function followMode() {
+	    if (_didResolveTempEdit) return;
 
-	        if (N <= M) {
-	            // reached leaf level; return leaf
-	            node = createNode$1(items.slice(left, right + 1));
-	            calcBBox$1(node, this.toBBox);
-	            return node;
-	        }
+	    try {
+	      // get the last 2 added nodes.
+	      // check if they are both part of only oneway (the same one)
+	      // check if the ways that they're part of are the same way
+	      // find index of the last two nodes, to determine the direction to travel around the existing way
+	      // add the next node to the way we are drawing
+	      // if we're drawing an area, the first node = last node.
+	      var isDrawingArea = _origWay.nodes[0] === _origWay.nodes.slice(-1)[0];
 
-	        if (!height) {
-	            // target height of the bulk-loaded tree
-	            height = Math.ceil(Math.log(N) / Math.log(M));
+	      var _origWay$nodes$slice = _origWay.nodes.slice(isDrawingArea ? -3 : -2),
+	          _origWay$nodes$slice2 = _slicedToArray(_origWay$nodes$slice, 2),
+	          secondLastNodeId = _origWay$nodes$slice2[0],
+	          lastNodeId = _origWay$nodes$slice2[1]; // Unlike startGraph, the full history graph may contain unsaved vertices to follow.
+	      // https://github.com/openstreetmap/iD/issues/8749
 
-	            // target number of root entries to maximize storage utilization
-	            M = Math.ceil(N / Math.pow(M, height - 1));
-	        }
 
-	        node = createNode$1([]);
-	        node.leaf = false;
-	        node.height = height;
+	      var historyGraph = context.history().graph();
 
-	        // split the items into M mostly square tiles
+	      if (!lastNodeId || !secondLastNodeId || !historyGraph.hasEntity(lastNodeId) || !historyGraph.hasEntity(secondLastNodeId)) {
+	        context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t('operations.follow.error.needs_more_initial_nodes'))();
+	        return;
+	      } // If the way has looped over itself, follow some other way.
 
-	        var N2 = Math.ceil(N / M),
-	            N1 = N2 * Math.ceil(Math.sqrt(M)),
-	            i, j, right2, right3;
 
-	        multiSelect$1(items, left, right, N1, this.compareMinX);
+	      var lastNodesParents = historyGraph.parentWays(historyGraph.entity(lastNodeId)).filter(function (w) {
+	        return w.id !== wayID;
+	      });
+	      var secondLastNodesParents = historyGraph.parentWays(historyGraph.entity(secondLastNodeId)).filter(function (w) {
+	        return w.id !== wayID;
+	      });
+	      var featureType = getFeatureType(lastNodesParents);
 
-	        for (i = left; i <= right; i += N1) {
+	      if (lastNodesParents.length !== 1 || secondLastNodesParents.length === 0) {
+	        context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t("operations.follow.error.intersection_of_multiple_ways.".concat(featureType)))();
+	        return;
+	      } // Check if the last node's parent is also the parent of the second last node.
+	      // The last node must only have one parent, but the second last node can have
+	      // multiple parents.
 
-	            right2 = Math.min(i + N1 - 1, right);
 
-	            multiSelect$1(items, i, right2, N2, this.compareMinY);
+	      if (!secondLastNodesParents.some(function (n) {
+	        return n.id === lastNodesParents[0].id;
+	      })) {
+	        context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t("operations.follow.error.intersection_of_different_ways.".concat(featureType)))();
+	        return;
+	      }
 
-	            for (j = i; j <= right2; j += N2) {
+	      var way = lastNodesParents[0];
+	      var indexOfLast = way.nodes.indexOf(lastNodeId);
+	      var indexOfSecondLast = way.nodes.indexOf(secondLastNodeId); // for a closed way, the first/last node is the same so it appears twice in the array,
+	      // but indexOf always finds the first occurrence. This is only an issue when following a way
+	      // in descending order
 
-	                right3 = Math.min(j + N2 - 1, right2);
+	      var isDescendingPastZero = indexOfLast === way.nodes.length - 2 && indexOfSecondLast === 0;
+	      var nextNodeIndex = indexOfLast + (indexOfLast > indexOfSecondLast && !isDescendingPastZero ? 1 : -1); // if we're following a closed way and we pass the first/last node, the  next index will be -1
 
-	                // pack each entry recursively
-	                node.children.push(this._build(items, j, right3, height - 1));
-	            }
+	      if (nextNodeIndex === -1) nextNodeIndex = indexOfSecondLast === 1 ? way.nodes.length - 2 : 1;
+	      var nextNode = historyGraph.entity(way.nodes[nextNodeIndex]);
+	      drawWay.addNode(nextNode, {
+	        geometry: {
+	          type: 'Point',
+	          coordinates: nextNode.loc
+	        },
+	        id: nextNode.id,
+	        properties: {
+	          target: true,
+	          entity: nextNode
 	        }
+	      });
+	    } catch (ex) {
+	      context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t('operations.follow.error.unknown'))();
+	    }
+	  }
 
-	        calcBBox$1(node, this.toBBox);
+	  keybinding.on(_t('operations.follow.key'), followMode);
+	  select(document).call(keybinding); // Finish the draw operation, removing the temporary edit.
+	  // If the way has enough nodes to be valid, it's selected.
+	  // Otherwise, delete everything and return to browse mode.
 
-	        return node;
-	    },
+	  drawWay.finish = function () {
+	    checkGeometry(false
+	    /* includeDrawNode */
+	    );
 
-	    _chooseSubtree: function (bbox, node, level, path) {
+	    if (context.surface().classed('nope')) {
+	      dispatch.call('rejectedSelfIntersection', this);
+	      return; // can't click here
+	    }
 
-	        var i, len, child, targetNode, area, enlargement, minArea, minEnlargement;
+	    context.pauseChangeDispatch(); // remove the temporary edit
 
-	        while (true) {
-	            path.push(node);
+	    context.pop(1);
+	    _didResolveTempEdit = true;
+	    context.resumeChangeDispatch();
+	    var way = context.hasEntity(wayID);
 
-	            if (node.leaf || path.length - 1 === level) { break; }
+	    if (!way || way.isDegenerate()) {
+	      drawWay.cancel();
+	      return;
+	    }
 
-	            minArea = minEnlargement = Infinity;
+	    window.setTimeout(function () {
+	      context.map().dblclickZoomEnable(true);
+	    }, 1000);
+	    var isNewFeature = !mode.isContinuing;
+	    context.enter(modeSelect(context, [wayID]).newFeature(isNewFeature));
+	  }; // Cancel the draw operation, delete everything, and return to browse mode.
 
-	            for (i = 0, len = node.children.length; i < len; i++) {
-	                child = node.children[i];
-	                area = bboxArea$1(child);
-	                enlargement = enlargedArea$1(bbox, child) - area;
 
-	                // choose entry with the least area enlargement
-	                if (enlargement < minEnlargement) {
-	                    minEnlargement = enlargement;
-	                    minArea = area < minArea ? area : minArea;
-	                    targetNode = child;
+	  drawWay.cancel = function () {
+	    context.pauseChangeDispatch();
+	    resetToStartGraph();
+	    context.resumeChangeDispatch();
+	    window.setTimeout(function () {
+	      context.map().dblclickZoomEnable(true);
+	    }, 1000);
+	    context.surface().classed('nope', false).classed('nope-disabled', false).classed('nope-suppressed', false);
+	    context.enter(modeBrowse(context));
+	  };
 
-	                } else if (enlargement === minEnlargement) {
-	                    // otherwise choose one with the smallest area
-	                    if (area < minArea) {
-	                        minArea = area;
-	                        targetNode = child;
-	                    }
-	                }
-	            }
+	  drawWay.nodeIndex = function (val) {
+	    if (!arguments.length) return _nodeIndex;
+	    _nodeIndex = val;
+	    return drawWay;
+	  };
 
-	            node = targetNode || node.children[0];
-	        }
+	  drawWay.activeID = function () {
+	    if (!arguments.length) return _drawNode && _drawNode.id; // no assign
 
-	        return node;
-	    },
+	    return drawWay;
+	  };
 
-	    _insert: function (item, level, isNode) {
+	  return utilRebind(drawWay, dispatch, 'on');
+	}
 
-	        var toBBox = this.toBBox,
-	            bbox = isNode ? item : toBBox(item),
-	            insertPath = [];
+	function modeDrawLine(context, wayID, startGraph, button, affix, continuing) {
+	  var mode = {
+	    button: button,
+	    id: 'draw-line'
+	  };
+	  var behavior = behaviorDrawWay(context, wayID, mode, startGraph).on('rejectedSelfIntersection.modeDrawLine', function () {
+	    context.ui().flash.iconName('#iD-icon-no').label(_t('self_intersection.error.lines'))();
+	  });
+	  mode.wayID = wayID;
+	  mode.isContinuing = continuing;
 
-	        // find the best node for accommodating the item, saving all nodes along the path too
-	        var node = this._chooseSubtree(bbox, this.data, level, insertPath);
+	  mode.enter = function () {
+	    behavior.nodeIndex(affix === 'prefix' ? 0 : undefined);
+	    context.install(behavior);
+	  };
 
-	        // put the item into the node
-	        node.children.push(item);
-	        extend$3(node, bbox);
+	  mode.exit = function () {
+	    context.uninstall(behavior);
+	  };
 
-	        // split on node overflow; propagate upwards if necessary
-	        while (level >= 0) {
-	            if (insertPath[level].children.length > this._maxEntries) {
-	                this._split(insertPath, level);
-	                level--;
-	            } else { break; }
-	        }
+	  mode.selectedIDs = function () {
+	    return [wayID];
+	  };
 
-	        // adjust bboxes along the insertion path
-	        this._adjustParentBBoxes(bbox, insertPath, level);
-	    },
+	  mode.activeID = function () {
+	    return behavior && behavior.activeID() || [];
+	  };
 
-	    // split overflowed node into two
-	    _split: function (insertPath, level) {
+	  return mode;
+	}
 
-	        var node = insertPath[level],
-	            M = node.children.length,
-	            m = this._minEntries;
+	function validationDisconnectedWay() {
+	  var type = 'disconnected_way';
 
-	        this._chooseSplitAxis(node, m, M);
+	  function isTaggedAsHighway(entity) {
+	    return osmRoutableHighwayTagValues[entity.tags.highway];
+	  }
 
-	        var splitIndex = this._chooseSplitIndex(node, m, M);
+	  var validation = function checkDisconnectedWay(entity, graph) {
+	    var routingIslandWays = routingIslandForEntity(entity);
+	    if (!routingIslandWays) return [];
+	    return [new validationIssue({
+	      type: type,
+	      subtype: 'highway',
+	      severity: 'warning',
+	      message: function message(context) {
+	        var entity = this.entityIds.length && context.hasEntity(this.entityIds[0]);
+	        var label = entity && utilDisplayLabel(entity, context.graph());
+	        return _t.html('issues.disconnected_way.routable.message', {
+	          count: this.entityIds.length,
+	          highway: label
+	        });
+	      },
+	      reference: showReference,
+	      entityIds: Array.from(routingIslandWays).map(function (way) {
+	        return way.id;
+	      }),
+	      dynamicFixes: makeFixes
+	    })];
 
-	        var newNode = createNode$1(node.children.splice(splitIndex, node.children.length - splitIndex));
-	        newNode.height = node.height;
-	        newNode.leaf = node.leaf;
+	    function makeFixes(context) {
+	      var fixes = [];
+	      var singleEntity = this.entityIds.length === 1 && context.hasEntity(this.entityIds[0]);
 
-	        calcBBox$1(node, this.toBBox);
-	        calcBBox$1(newNode, this.toBBox);
+	      if (singleEntity) {
+	        if (singleEntity.type === 'way' && !singleEntity.isClosed()) {
+	          var textDirection = _mainLocalizer.textDirection();
+	          var startFix = makeContinueDrawingFixIfAllowed(textDirection, singleEntity.first(), 'start');
+	          if (startFix) fixes.push(startFix);
+	          var endFix = makeContinueDrawingFixIfAllowed(textDirection, singleEntity.last(), 'end');
+	          if (endFix) fixes.push(endFix);
+	        }
 
-	        if (level) { insertPath[level - 1].children.push(newNode); }
-	        else { this._splitRoot(node, newNode); }
-	    },
+	        if (!fixes.length) {
+	          fixes.push(new validationIssueFix({
+	            title: _t.html('issues.fix.connect_feature.title')
+	          }));
+	        }
 
-	    _splitRoot: function (node, newNode) {
-	        // split root node
-	        this.data = createNode$1([node, newNode]);
-	        this.data.height = node.height + 1;
-	        this.data.leaf = false;
-	        calcBBox$1(this.data, this.toBBox);
-	    },
+	        fixes.push(new validationIssueFix({
+	          icon: 'iD-operation-delete',
+	          title: _t.html('issues.fix.delete_feature.title'),
+	          entityIds: [singleEntity.id],
+	          onClick: function onClick(context) {
+	            var id = this.issue.entityIds[0];
+	            var operation = operationDelete(context, [id]);
 
-	    _chooseSplitIndex: function (node, m, M) {
+	            if (!operation.disabled()) {
+	              operation();
+	            }
+	          }
+	        }));
+	      } else {
+	        fixes.push(new validationIssueFix({
+	          title: _t.html('issues.fix.connect_features.title')
+	        }));
+	      }
 
-	        var i, bbox1, bbox2, overlap, area, minOverlap, minArea, index;
+	      return fixes;
+	    }
 
-	        minOverlap = minArea = Infinity;
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.disconnected_way.routable.reference'));
+	    }
 
-	        for (i = m; i <= M - m; i++) {
-	            bbox1 = distBBox$1(node, 0, i, this.toBBox);
-	            bbox2 = distBBox$1(node, i, M, this.toBBox);
+	    function routingIslandForEntity(entity) {
+	      var routingIsland = new Set(); // the interconnected routable features
 
-	            overlap = intersectionArea$1(bbox1, bbox2);
-	            area = bboxArea$1(bbox1) + bboxArea$1(bbox2);
+	      var waysToCheck = []; // the queue of remaining routable ways to traverse
 
-	            // choose distribution with minimum overlap
-	            if (overlap < minOverlap) {
-	                minOverlap = overlap;
-	                index = i;
+	      function queueParentWays(node) {
+	        graph.parentWays(node).forEach(function (parentWay) {
+	          if (!routingIsland.has(parentWay) && // only check each feature once
+	          isRoutableWay(parentWay, false)) {
+	            // only check routable features
+	            routingIsland.add(parentWay);
+	            waysToCheck.push(parentWay);
+	          }
+	        });
+	      }
 
-	                minArea = area < minArea ? area : minArea;
+	      if (entity.type === 'way' && isRoutableWay(entity, true)) {
+	        routingIsland.add(entity);
+	        waysToCheck.push(entity);
+	      } else if (entity.type === 'node' && isRoutableNode(entity)) {
+	        routingIsland.add(entity);
+	        queueParentWays(entity);
+	      } else {
+	        // this feature isn't routable, cannot be a routing island
+	        return null;
+	      }
 
-	            } else if (overlap === minOverlap) {
-	                // otherwise choose distribution with minimum area
-	                if (area < minArea) {
-	                    minArea = area;
-	                    index = i;
-	                }
-	            }
-	        }
+	      while (waysToCheck.length) {
+	        var wayToCheck = waysToCheck.pop();
+	        var childNodes = graph.childNodes(wayToCheck);
 
-	        return index;
-	    },
+	        for (var i in childNodes) {
+	          var vertex = childNodes[i];
 
-	    // sorts node children by the best axis for split
-	    _chooseSplitAxis: function (node, m, M) {
+	          if (isConnectedVertex(vertex)) {
+	            // found a link to the wider network, not a routing island
+	            return null;
+	          }
 
-	        var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX$1,
-	            compareMinY = node.leaf ? this.compareMinY : compareNodeMinY$1,
-	            xMargin = this._allDistMargin(node, m, M, compareMinX),
-	            yMargin = this._allDistMargin(node, m, M, compareMinY);
+	          if (isRoutableNode(vertex)) {
+	            routingIsland.add(vertex);
+	          }
 
-	        // if total distributions margin value is minimal for x, sort by minX,
-	        // otherwise it's already sorted by minY
-	        if (xMargin < yMargin) { node.children.sort(compareMinX); }
-	    },
+	          queueParentWays(vertex);
+	        }
+	      } // no network link found, this is a routing island, return its members
 
-	    // total margin of all possible split distributions where each node is at least m full
-	    _allDistMargin: function (node, m, M, compare) {
 
-	        node.children.sort(compare);
+	      return routingIsland;
+	    }
 
-	        var toBBox = this.toBBox,
-	            leftBBox = distBBox$1(node, 0, m, toBBox),
-	            rightBBox = distBBox$1(node, M - m, M, toBBox),
-	            margin = bboxMargin$1(leftBBox) + bboxMargin$1(rightBBox),
-	            i, child;
+	    function isConnectedVertex(vertex) {
+	      // assume ways overlapping unloaded tiles are connected to the wider road network  - #5938
+	      var osm = services.osm;
+	      if (osm && !osm.isDataLoaded(vertex.loc)) return true; // entrances are considered connected
 
-	        for (i = m; i < M - m; i++) {
-	            child = node.children[i];
-	            extend$3(leftBBox, node.leaf ? toBBox(child) : child);
-	            margin += bboxMargin$1(leftBBox);
-	        }
+	      if (vertex.tags.entrance && vertex.tags.entrance !== 'no') return true;
+	      if (vertex.tags.amenity === 'parking_entrance') return true;
+	      return false;
+	    }
 
-	        for (i = M - m - 1; i >= m; i--) {
-	            child = node.children[i];
-	            extend$3(rightBBox, node.leaf ? toBBox(child) : child);
-	            margin += bboxMargin$1(rightBBox);
-	        }
+	    function isRoutableNode(node) {
+	      // treat elevators as distinct features in the highway network
+	      if (node.tags.highway === 'elevator') return true;
+	      return false;
+	    }
 
-	        return margin;
-	    },
+	    function isRoutableWay(way, ignoreInnerWays) {
+	      if (isTaggedAsHighway(way) || way.tags.route === 'ferry') return true;
+	      return graph.parentRelations(way).some(function (parentRelation) {
+	        if (parentRelation.tags.type === 'route' && parentRelation.tags.route === 'ferry') return true;
+	        if (parentRelation.isMultipolygon() && isTaggedAsHighway(parentRelation) && (!ignoreInnerWays || parentRelation.memberById(way.id).role !== 'inner')) return true;
+	        return false;
+	      });
+	    }
 
-	    _adjustParentBBoxes: function (bbox, path, level) {
-	        // adjust bboxes along the given tree path
-	        for (var i = level; i >= 0; i--) {
-	            extend$3(path[i], bbox);
-	        }
-	    },
+	    function makeContinueDrawingFixIfAllowed(textDirection, vertexID, whichEnd) {
+	      var vertex = graph.hasEntity(vertexID);
+	      if (!vertex || vertex.tags.noexit === 'yes') return null;
+	      var useLeftContinue = whichEnd === 'start' && textDirection === 'ltr' || whichEnd === 'end' && textDirection === 'rtl';
+	      return new validationIssueFix({
+	        icon: 'iD-operation-continue' + (useLeftContinue ? '-left' : ''),
+	        title: _t.html('issues.fix.continue_from_' + whichEnd + '.title'),
+	        entityIds: [vertexID],
+	        onClick: function onClick(context) {
+	          var wayId = this.issue.entityIds[0];
+	          var way = context.hasEntity(wayId);
+	          var vertexId = this.entityIds[0];
+	          var vertex = context.hasEntity(vertexId);
+	          if (!way || !vertex) return; // make sure the vertex is actually visible and editable
 
-	    _condense: function (path) {
-	        // go through the path, removing empty nodes and updating bboxes
-	        for (var i = path.length - 1, siblings; i >= 0; i--) {
-	            if (path[i].children.length === 0) {
-	                if (i > 0) {
-	                    siblings = path[i - 1].children;
-	                    siblings.splice(siblings.indexOf(path[i]), 1);
+	          var map = context.map();
 
-	                } else { this.clear(); }
+	          if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
+	            map.zoomToEase(vertex);
+	          }
 
-	            } else { calcBBox$1(path[i], this.toBBox); }
+	          context.enter(modeDrawLine(context, wayId, context.graph(), 'line', way.affix(vertexId), true));
 	        }
-	    },
+	      });
+	    }
+	  };
 
-	    _initFormat: function (format) {
-	        // data format (minX, minY, maxX, maxY accessors)
+	  validation.type = type;
+	  return validation;
+	}
 
-	        // uses eval-type function compilation instead of just accepting a toBBox function
-	        // because the algorithms are very sensitive to sorting functions performance,
-	        // so they should be dead simple and without inner calls
+	function validationFormatting() {
+	  var type = 'invalid_format';
 
-	        var compareArr = ['return a', ' - b', ';'];
+	  var validation = function validation(entity) {
+	    var issues = [];
 
-	        this.compareMinX = new Function('a', 'b', compareArr.join(format[0]));
-	        this.compareMinY = new Function('a', 'b', compareArr.join(format[1]));
+	    function isValidEmail(email) {
+	      // Emails in OSM are going to be official so they should be pretty simple
+	      // Using negated lists to better support all possible unicode characters (#6494)
+	      var valid_email = /^[^\(\)\\,":;<>@\[\]]+@[^\(\)\\,":;<>@\[\]\.]+(?:\.[a-z0-9-]+)*$/i; // An empty value is also acceptable
 
-	        this.toBBox = new Function('a',
-	            'return {minX: a' + format[0] +
-	            ', minY: a' + format[1] +
-	            ', maxX: a' + format[2] +
-	            ', maxY: a' + format[3] + '};');
+	      return !email || valid_email.test(email);
 	    }
-	};
+	    /*
+	    function isSchemePresent(url) {
+	        var valid_scheme = /^https?:\/\//i;
+	        return (!url || valid_scheme.test(url));
+	    }
+	    */
 
-	function findItem$1(item, items, equalsFn) {
-	    if (!equalsFn) { return items.indexOf(item); }
 
-	    for (var i = 0; i < items.length; i++) {
-	        if (equalsFn(item, items[i])) { return i; }
+	    function showReferenceEmail(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.invalid_format.email.reference'));
 	    }
-	    return -1;
-	}
+	    /*
+	    function showReferenceWebsite(selection) {
+	        selection.selectAll('.issue-reference')
+	            .data([0])
+	            .enter()
+	            .append('div')
+	            .attr('class', 'issue-reference')
+	            .html(t.html('issues.invalid_format.website.reference'));
+	    }
+	     if (entity.tags.website) {
+	        // Multiple websites are possible
+	        // If ever we support ES6, arrow functions make this nicer
+	        var websites = entity.tags.website
+	            .split(';')
+	            .map(function(s) { return s.trim(); })
+	            .filter(function(x) { return !isSchemePresent(x); });
+	         if (websites.length) {
+	            issues.push(new validationIssue({
+	                type: type,
+	                subtype: 'website',
+	                severity: 'warning',
+	                message: function(context) {
+	                    var entity = context.hasEntity(this.entityIds[0]);
+	                    return entity ? t.html('issues.invalid_format.website.message' + this.data,
+	                        { feature: utilDisplayLabel(entity, context.graph()), site: websites.join(', ') }) : '';
+	                },
+	                reference: showReferenceWebsite,
+	                entityIds: [entity.id],
+	                hash: websites.join(),
+	                data: (websites.length > 1) ? '_multi' : ''
+	            }));
+	        }
+	    }
+	    */
 
-	// calculate node's bbox from bboxes of its children
-	function calcBBox$1(node, toBBox) {
-	    distBBox$1(node, 0, node.children.length, toBBox, node);
-	}
 
-	// min bounding rectangle of node children from k to p-1
-	function distBBox$1(node, k, p, toBBox, destNode) {
-	    if (!destNode) { destNode = createNode$1(null); }
-	    destNode.minX = Infinity;
-	    destNode.minY = Infinity;
-	    destNode.maxX = -Infinity;
-	    destNode.maxY = -Infinity;
+	    if (entity.tags.email) {
+	      // Multiple emails are possible
+	      var emails = entity.tags.email.split(';').map(function (s) {
+	        return s.trim();
+	      }).filter(function (x) {
+	        return !isValidEmail(x);
+	      });
 
-	    for (var i = k, child; i < p; i++) {
-	        child = node.children[i];
-	        extend$3(destNode, node.leaf ? toBBox(child) : child);
+	      if (emails.length) {
+	        issues.push(new validationIssue({
+	          type: type,
+	          subtype: 'email',
+	          severity: 'warning',
+	          message: function message(context) {
+	            var entity = context.hasEntity(this.entityIds[0]);
+	            return entity ? _t.html('issues.invalid_format.email.message' + this.data, {
+	              feature: utilDisplayLabel(entity, context.graph()),
+	              email: emails.join(', ')
+	            }) : '';
+	          },
+	          reference: showReferenceEmail,
+	          entityIds: [entity.id],
+	          hash: emails.join(),
+	          data: emails.length > 1 ? '_multi' : ''
+	        }));
+	      }
 	    }
 
-	    return destNode;
-	}
+	    return issues;
+	  };
 
-	function extend$3(a, b) {
-	    a.minX = Math.min(a.minX, b.minX);
-	    a.minY = Math.min(a.minY, b.minY);
-	    a.maxX = Math.max(a.maxX, b.maxX);
-	    a.maxY = Math.max(a.maxY, b.maxY);
-	    return a;
+	  validation.type = type;
+	  return validation;
 	}
 
-	function compareNodeMinX$1(a, b) { return a.minX - b.minX; }
-	function compareNodeMinY$1(a, b) { return a.minY - b.minY; }
+	function validationHelpRequest(context) {
+	  var type = 'help_request';
 
-	function bboxArea$1(a)   { return (a.maxX - a.minX) * (a.maxY - a.minY); }
-	function bboxMargin$1(a) { return (a.maxX - a.minX) + (a.maxY - a.minY); }
+	  var validation = function checkFixmeTag(entity) {
+	    if (!entity.tags.fixme) return []; // don't flag fixmes on features added by the user
 
-	function enlargedArea$1(a, b) {
-	    return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) *
-	           (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));
-	}
+	    if (entity.version === undefined) return [];
 
-	function intersectionArea$1(a, b) {
-	    var minX = Math.max(a.minX, b.minX),
-	        minY = Math.max(a.minY, b.minY),
-	        maxX = Math.min(a.maxX, b.maxX),
-	        maxY = Math.min(a.maxY, b.maxY);
+	    if (entity.v !== undefined) {
+	      var baseEntity = context.history().base().hasEntity(entity.id); // don't flag fixmes added by the user on existing features
 
-	    return Math.max(0, maxX - minX) *
-	           Math.max(0, maxY - minY);
-	}
+	      if (!baseEntity || !baseEntity.tags.fixme) return [];
+	    }
 
-	function contains$2(a, b) {
-	    return a.minX <= b.minX &&
-	           a.minY <= b.minY &&
-	           b.maxX <= a.maxX &&
-	           b.maxY <= a.maxY;
-	}
+	    return [new validationIssue({
+	      type: type,
+	      subtype: 'fixme_tag',
+	      severity: 'warning',
+	      message: function message(context) {
+	        var entity = context.hasEntity(this.entityIds[0]);
+	        return entity ? _t.html('issues.fixme_tag.message', {
+	          feature: utilDisplayLabel(entity, context.graph(), true
+	          /* verbose */
+	          )
+	        }) : '';
+	      },
+	      dynamicFixes: function dynamicFixes() {
+	        return [new validationIssueFix({
+	          title: _t.html('issues.fix.address_the_concern.title')
+	        })];
+	      },
+	      reference: showReference,
+	      entityIds: [entity.id]
+	    })];
 
-	function intersects$1(a, b) {
-	    return b.minX <= a.maxX &&
-	           b.minY <= a.maxY &&
-	           b.maxX >= a.minX &&
-	           b.maxY >= a.minY;
-	}
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.fixme_tag.reference'));
+	    }
+	  };
 
-	function createNode$1(children) {
-	    return {
-	        children: children,
-	        height: 1,
-	        leaf: true,
-	        minX: Infinity,
-	        minY: Infinity,
-	        maxX: -Infinity,
-	        maxY: -Infinity
-	    };
+	  validation.type = type;
+	  return validation;
 	}
 
-	// sort an array so that items come in groups of n unsorted items, with groups sorted between each other;
-	// combines selection algorithm with binary divide & conquer approach
+	function validationImpossibleOneway() {
+	  var type = 'impossible_oneway';
+
+	  var validation = function checkImpossibleOneway(entity, graph) {
+	    if (entity.type !== 'way' || entity.geometry(graph) !== 'line') return [];
+	    if (entity.isClosed()) return [];
+	    if (!typeForWay(entity)) return [];
+	    if (!isOneway(entity)) return [];
+	    var firstIssues = issuesForNode(entity, entity.first());
+	    var lastIssues = issuesForNode(entity, entity.last());
+	    return firstIssues.concat(lastIssues);
+
+	    function typeForWay(way) {
+	      if (way.geometry(graph) !== 'line') return null;
+	      if (osmRoutableHighwayTagValues[way.tags.highway]) return 'highway';
+	      if (osmFlowingWaterwayTagValues[way.tags.waterway]) return 'waterway';
+	      return null;
+	    }
 
-	function multiSelect$1(arr, left, right, n, compare) {
-	    var stack = [left, right],
-	        mid;
+	    function isOneway(way) {
+	      if (way.tags.oneway === 'yes') return true;
+	      if (way.tags.oneway) return false;
+
+	      for (var key in way.tags) {
+	        if (osmOneWayTags[key] && osmOneWayTags[key][way.tags[key]]) {
+	          return true;
+	        }
+	      }
 
-	    while (stack.length) {
-	        right = stack.pop();
-	        left = stack.pop();
+	      return false;
+	    }
 
-	        if (right - left <= n) { continue; }
+	    function nodeOccursMoreThanOnce(way, nodeID) {
+	      var occurrences = 0;
 
-	        mid = left + Math.ceil((right - left) / n / 2) * n;
-	        quickselect$1(arr, mid, left, right, compare);
+	      for (var index in way.nodes) {
+	        if (way.nodes[index] === nodeID) {
+	          occurrences += 1;
+	          if (occurrences > 1) return true;
+	        }
+	      }
 
-	        stack.push(left, mid, mid, right);
+	      return false;
 	    }
-	}
-	rbush_1.default = _default$2;
 
-	var lineclip_1$1 = lineclip$1;
+	    function isConnectedViaOtherTypes(way, node) {
+	      var wayType = typeForWay(way);
 
-	lineclip$1.polyline = lineclip$1;
-	lineclip$1.polygon = polygonclip$1;
+	      if (wayType === 'highway') {
+	        // entrances are considered connected
+	        if (node.tags.entrance && node.tags.entrance !== 'no') return true;
+	        if (node.tags.amenity === 'parking_entrance') return true;
+	      } else if (wayType === 'waterway') {
+	        if (node.id === way.first()) {
+	          // multiple waterways may start at the same spring
+	          if (node.tags.natural === 'spring') return true;
+	        } else {
+	          // multiple waterways may end at the same drain
+	          if (node.tags.manhole === 'drain') return true;
+	        }
+	      }
 
+	      return graph.parentWays(node).some(function (parentWay) {
+	        if (parentWay.id === way.id) return false;
 
-	// Cohen-Sutherland line clippign algorithm, adapted to efficiently
-	// handle polylines rather than just segments
+	        if (wayType === 'highway') {
+	          // allow connections to highway areas
+	          if (parentWay.geometry(graph) === 'area' && osmRoutableHighwayTagValues[parentWay.tags.highway]) return true; // count connections to ferry routes as connected
 
-	function lineclip$1(points, bbox, result) {
+	          if (parentWay.tags.route === 'ferry') return true;
+	          return graph.parentRelations(parentWay).some(function (parentRelation) {
+	            if (parentRelation.tags.type === 'route' && parentRelation.tags.route === 'ferry') return true; // allow connections to highway multipolygons
 
-	    var len = points.length,
-	        codeA = bitCode$1(points[0], bbox),
-	        part = [],
-	        i, a, b, codeB, lastCode;
+	            return parentRelation.isMultipolygon() && osmRoutableHighwayTagValues[parentRelation.tags.highway];
+	          });
+	        } else if (wayType === 'waterway') {
+	          // multiple waterways may start or end at a water body at the same node
+	          if (parentWay.tags.natural === 'water' || parentWay.tags.natural === 'coastline') return true;
+	        }
 
-	    if (!result) { result = []; }
+	        return false;
+	      });
+	    }
 
-	    for (i = 1; i < len; i++) {
-	        a = points[i - 1];
-	        b = points[i];
-	        codeB = lastCode = bitCode$1(b, bbox);
+	    function issuesForNode(way, nodeID) {
+	      var isFirst = nodeID === way.first();
+	      var wayType = typeForWay(way); // ignore if this way is self-connected at this node
 
-	        while (true) {
+	      if (nodeOccursMoreThanOnce(way, nodeID)) return [];
+	      var osm = services.osm;
+	      if (!osm) return [];
+	      var node = graph.hasEntity(nodeID); // ignore if this node or its tile are unloaded
+
+	      if (!node || !osm.isDataLoaded(node.loc)) return [];
+	      if (isConnectedViaOtherTypes(way, node)) return [];
+	      var attachedWaysOfSameType = graph.parentWays(node).filter(function (parentWay) {
+	        if (parentWay.id === way.id) return false;
+	        return typeForWay(parentWay) === wayType;
+	      }); // assume it's okay for waterways to start or end disconnected for now
+
+	      if (wayType === 'waterway' && attachedWaysOfSameType.length === 0) return [];
+	      var attachedOneways = attachedWaysOfSameType.filter(function (attachedWay) {
+	        return isOneway(attachedWay);
+	      }); // ignore if the way is connected to some non-oneway features
+
+	      if (attachedOneways.length < attachedWaysOfSameType.length) return [];
+
+	      if (attachedOneways.length) {
+	        var connectedEndpointsOkay = attachedOneways.some(function (attachedOneway) {
+	          if ((isFirst ? attachedOneway.first() : attachedOneway.last()) !== nodeID) return true;
+	          if (nodeOccursMoreThanOnce(attachedOneway, nodeID)) return true;
+	          return false;
+	        });
+	        if (connectedEndpointsOkay) return [];
+	      }
 
-	            if (!(codeA | codeB)) { // accept
-	                part.push(a);
+	      var placement = isFirst ? 'start' : 'end',
+	          messageID = wayType + '.',
+	          referenceID = wayType + '.';
 
-	                if (codeB !== lastCode) { // segment went outside
-	                    part.push(b);
+	      if (wayType === 'waterway') {
+	        messageID += 'connected.' + placement;
+	        referenceID += 'connected';
+	      } else {
+	        messageID += placement;
+	        referenceID += placement;
+	      }
 
-	                    if (i < len - 1) { // start a new line
-	                        result.push(part);
-	                        part = [];
-	                    }
-	                } else if (i === len - 1) {
-	                    part.push(b);
-	                }
-	                break;
+	      return [new validationIssue({
+	        type: type,
+	        subtype: wayType,
+	        severity: 'warning',
+	        message: function message(context) {
+	          var entity = context.hasEntity(this.entityIds[0]);
+	          return entity ? _t.html('issues.impossible_oneway.' + messageID + '.message', {
+	            feature: utilDisplayLabel(entity, context.graph())
+	          }) : '';
+	        },
+	        reference: getReference(referenceID),
+	        entityIds: [way.id, node.id],
+	        dynamicFixes: function dynamicFixes() {
+	          var fixes = [];
 
-	            } else if (codeA & codeB) { // trivial reject
-	                break;
+	          if (attachedOneways.length) {
+	            fixes.push(new validationIssueFix({
+	              icon: 'iD-operation-reverse',
+	              title: _t.html('issues.fix.reverse_feature.title'),
+	              entityIds: [way.id],
+	              onClick: function onClick(context) {
+	                var id = this.issue.entityIds[0];
+	                context.perform(actionReverse(id), _t('operations.reverse.annotation.line', {
+	                  n: 1
+	                }));
+	              }
+	            }));
+	          }
 
-	            } else if (codeA) { // a outside, intersect with clip edge
-	                a = intersect$1(a, b, codeA, bbox);
-	                codeA = bitCode$1(a, bbox);
+	          if (node.tags.noexit !== 'yes') {
+	            var textDirection = _mainLocalizer.textDirection();
+	            var useLeftContinue = isFirst && textDirection === 'ltr' || !isFirst && textDirection === 'rtl';
+	            fixes.push(new validationIssueFix({
+	              icon: 'iD-operation-continue' + (useLeftContinue ? '-left' : ''),
+	              title: _t.html('issues.fix.continue_from_' + (isFirst ? 'start' : 'end') + '.title'),
+	              onClick: function onClick(context) {
+	                var entityID = this.issue.entityIds[0];
+	                var vertexID = this.issue.entityIds[1];
+	                var way = context.entity(entityID);
+	                var vertex = context.entity(vertexID);
+	                continueDrawing(way, vertex, context);
+	              }
+	            }));
+	          }
 
-	            } else { // b outside
-	                b = intersect$1(a, b, codeB, bbox);
-	                codeB = bitCode$1(b, bbox);
-	            }
-	        }
+	          return fixes;
+	        },
+	        loc: node.loc
+	      })];
 
-	        codeA = lastCode;
+	      function getReference(referenceID) {
+	        return function showReference(selection) {
+	          selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.impossible_oneway.' + referenceID + '.reference'));
+	        };
+	      }
 	    }
+	  };
 
-	    if (part.length) { result.push(part); }
+	  function continueDrawing(way, vertex, context) {
+	    // make sure the vertex is actually visible and editable
+	    var map = context.map();
 
-	    return result;
+	    if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
+	      map.zoomToEase(vertex);
+	    }
+
+	    context.enter(modeDrawLine(context, way.id, context.graph(), 'line', way.affix(vertex.id), true));
+	  }
+
+	  validation.type = type;
+	  return validation;
 	}
 
-	// Sutherland-Hodgeman polygon clipping algorithm
+	function validationIncompatibleSource() {
+	  var type = 'incompatible_source';
+	  var incompatibleRules = [{
+	    id: 'amap',
+	    regex: /(amap|autonavi|mapabc|高德)/i
+	  }, {
+	    id: 'baidu',
+	    regex: /(baidu|mapbar|百度)/i
+	  }, {
+	    id: 'google',
+	    regex: /google/i,
+	    exceptRegex: /((books|drive)\.google|google\s?(books|drive|plus))/i
+	  }];
+
+	  var validation = function checkIncompatibleSource(entity) {
+	    var entitySources = entity.tags && entity.tags.source && entity.tags.source.split(';');
+	    if (!entitySources) return [];
+	    var entityID = entity.id;
+	    return entitySources.map(function (source) {
+	      var matchRule = incompatibleRules.find(function (rule) {
+	        if (!rule.regex.test(source)) return false;
+	        if (rule.exceptRegex && rule.exceptRegex.test(source)) return false;
+	        return true;
+	      });
+	      if (!matchRule) return null;
+	      return new validationIssue({
+	        type: type,
+	        severity: 'warning',
+	        message: function message(context) {
+	          var entity = context.hasEntity(entityID);
+	          return entity ? _t.html('issues.incompatible_source.feature.message', {
+	            feature: utilDisplayLabel(entity, context.graph(), true
+	            /* verbose */
+	            ),
+	            value: source
+	          }) : '';
+	        },
+	        reference: getReference(matchRule.id),
+	        entityIds: [entityID],
+	        hash: source,
+	        dynamicFixes: function dynamicFixes() {
+	          return [new validationIssueFix({
+	            title: _t.html('issues.fix.remove_proprietary_data.title')
+	          })];
+	        }
+	      });
+	    }).filter(Boolean);
 
-	function polygonclip$1(points, bbox) {
+	    function getReference(id) {
+	      return function showReference(selection) {
+	        selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html("issues.incompatible_source.reference.".concat(id)));
+	      };
+	    }
+	  };
 
-	    var result, edge, prev, prevInside, i, p, inside;
+	  validation.type = type;
+	  return validation;
+	}
 
-	    // clip against each side of the clip rectangle
-	    for (edge = 1; edge <= 8; edge *= 2) {
-	        result = [];
-	        prev = points[points.length - 1];
-	        prevInside = !(bitCode$1(prev, bbox) & edge);
+	function validationMaprules() {
+	  var type = 'maprules';
 
-	        for (i = 0; i < points.length; i++) {
-	            p = points[i];
-	            inside = !(bitCode$1(p, bbox) & edge);
+	  var validation = function checkMaprules(entity, graph) {
+	    if (!services.maprules) return [];
+	    var rules = services.maprules.validationRules();
+	    var issues = [];
 
-	            // if segment goes through the clip window, add an intersection
-	            if (inside !== prevInside) { result.push(intersect$1(prev, p, edge, bbox)); }
+	    for (var i = 0; i < rules.length; i++) {
+	      var rule = rules[i];
+	      rule.findIssues(entity, graph, issues);
+	    }
 
-	            if (inside) { result.push(p); } // add a point if it's inside
+	    return issues;
+	  };
 
-	            prev = p;
-	            prevInside = inside;
-	        }
+	  validation.type = type;
+	  return validation;
+	}
 
-	        points = result;
+	function validationMismatchedGeometry() {
+	  var type = 'mismatched_geometry';
+
+	  function tagSuggestingLineIsArea(entity) {
+	    if (entity.type !== 'way' || entity.isClosed()) return null;
+	    var tagSuggestingArea = entity.tagSuggestingArea();
 
-	        if (!points.length) { break; }
+	    if (!tagSuggestingArea) {
+	      return null;
 	    }
 
-	    return result;
-	}
+	    var asLine = _mainPresetIndex.matchTags(tagSuggestingArea, 'line');
+	    var asArea = _mainPresetIndex.matchTags(tagSuggestingArea, 'area');
 
-	// intersect a segment against one of the 4 lines that make up the bbox
+	    if (asLine && asArea && asLine === asArea) {
+	      // these tags also allow lines and making this an area wouldn't matter
+	      return null;
+	    }
 
-	function intersect$1(a, b, edge, bbox) {
-	    return edge & 8 ? [a[0] + (b[0] - a[0]) * (bbox[3] - a[1]) / (b[1] - a[1]), bbox[3]] : // top
-	           edge & 4 ? [a[0] + (b[0] - a[0]) * (bbox[1] - a[1]) / (b[1] - a[1]), bbox[1]] : // bottom
-	           edge & 2 ? [bbox[2], a[1] + (b[1] - a[1]) * (bbox[2] - a[0]) / (b[0] - a[0])] : // right
-	           edge & 1 ? [bbox[0], a[1] + (b[1] - a[1]) * (bbox[0] - a[0]) / (b[0] - a[0])] : // left
-	           null;
-	}
+	    return tagSuggestingArea;
+	  }
 
-	// bit code reflects the point position relative to the bbox:
+	  function makeConnectEndpointsFixOnClick(way, graph) {
+	    // must have at least three nodes to close this automatically
+	    if (way.nodes.length < 3) return null;
+	    var nodes = graph.childNodes(way),
+	        testNodes;
+	    var firstToLastDistanceMeters = geoSphericalDistance(nodes[0].loc, nodes[nodes.length - 1].loc); // if the distance is very small, attempt to merge the endpoints
 
-	//         left  mid  right
-	//    top  1001  1000  1010
-	//    mid  0001  0000  0010
-	// bottom  0101  0100  0110
+	    if (firstToLastDistanceMeters < 0.75) {
+	      testNodes = nodes.slice(); // shallow copy
 
-	function bitCode$1(p, bbox) {
-	    var code = 0;
+	      testNodes.pop();
+	      testNodes.push(testNodes[0]); // make sure this will not create a self-intersection
 
-	    if (p[0] < bbox[0]) { code |= 1; } // left
-	    else if (p[0] > bbox[2]) { code |= 2; } // right
+	      if (!geoHasSelfIntersections(testNodes, testNodes[0].id)) {
+	        return function (context) {
+	          var way = context.entity(this.issue.entityIds[0]);
+	          context.perform(actionMergeNodes([way.nodes[0], way.nodes[way.nodes.length - 1]], nodes[0].loc), _t('issues.fix.connect_endpoints.annotation'));
+	        };
+	      }
+	    } // if the points were not merged, attempt to close the way
 
-	    if (p[1] < bbox[1]) { code |= 4; } // bottom
-	    else if (p[1] > bbox[3]) { code |= 8; } // top
 
-	    return code;
-	}
+	    testNodes = nodes.slice(); // shallow copy
 
-	var whichPolygon_1 = whichPolygon;
+	    testNodes.push(testNodes[0]); // make sure this will not create a self-intersection
 
-	function whichPolygon(data) {
-	    var bboxes = [];
-	    for (var i = 0; i < data.features.length; i++) {
-	        var feature = data.features[i];
-	        var coords = feature.geometry.coordinates;
+	    if (!geoHasSelfIntersections(testNodes, testNodes[0].id)) {
+	      return function (context) {
+	        var wayId = this.issue.entityIds[0];
+	        var way = context.entity(wayId);
+	        var nodeId = way.nodes[0];
+	        var index = way.nodes.length;
+	        context.perform(actionAddVertex(wayId, nodeId, index), _t('issues.fix.connect_endpoints.annotation'));
+	      };
+	    }
+	  }
 
-	        if (feature.geometry.type === 'Polygon') {
-	            bboxes.push(treeItem(coords, feature.properties));
+	  function lineTaggedAsAreaIssue(entity) {
+	    var tagSuggestingArea = tagSuggestingLineIsArea(entity);
+	    if (!tagSuggestingArea) return null;
+	    return new validationIssue({
+	      type: type,
+	      subtype: 'area_as_line',
+	      severity: 'warning',
+	      message: function message(context) {
+	        var entity = context.hasEntity(this.entityIds[0]);
+	        return entity ? _t.html('issues.tag_suggests_area.message', {
+	          feature: utilDisplayLabel(entity, 'area', true
+	          /* verbose */
+	          ),
+	          tag: utilTagText({
+	            tags: tagSuggestingArea
+	          })
+	        }) : '';
+	      },
+	      reference: showReference,
+	      entityIds: [entity.id],
+	      hash: JSON.stringify(tagSuggestingArea),
+	      dynamicFixes: function dynamicFixes(context) {
+	        var fixes = [];
+	        var entity = context.entity(this.entityIds[0]);
+	        var connectEndsOnClick = makeConnectEndpointsFixOnClick(entity, context.graph());
+	        fixes.push(new validationIssueFix({
+	          title: _t.html('issues.fix.connect_endpoints.title'),
+	          onClick: connectEndsOnClick
+	        }));
+	        fixes.push(new validationIssueFix({
+	          icon: 'iD-operation-delete',
+	          title: _t.html('issues.fix.remove_tag.title'),
+	          onClick: function onClick(context) {
+	            var entityId = this.issue.entityIds[0];
+	            var entity = context.entity(entityId);
+	            var tags = Object.assign({}, entity.tags); // shallow copy
 
-	        } else if (feature.geometry.type === 'MultiPolygon') {
-	            for (var j = 0; j < coords.length; j++) {
-	                bboxes.push(treeItem(coords[j], feature.properties));
+	            for (var key in tagSuggestingArea) {
+	              delete tags[key];
 	            }
-	        }
-	    }
 
-	    var tree = rbush_1().load(bboxes);
+	            context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_tag.annotation'));
+	          }
+	        }));
+	        return fixes;
+	      }
+	    });
 
-	    function query(p, multi) {
-	        var output = [],
-	            result = tree.search({
-	                minX: p[0],
-	                minY: p[1],
-	                maxX: p[0],
-	                maxY: p[1]
-	            });
-	        for (var i = 0; i < result.length; i++) {
-	            if (insidePolygon(result[i].coords, p)) {
-	                if (multi)
-	                    { output.push(result[i].props); }
-	                else
-	                    { return result[i].props; }
-	            }
-	        }
-	        return multi && output.length ? output : null;
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.tag_suggests_area.reference'));
 	    }
+	  }
 
-	    query.tree = tree;
-	    query.bbox = function queryBBox(bbox) {
-	        var output = [];
-	        var result = tree.search({
-	            minX: bbox[0],
-	            minY: bbox[1],
-	            maxX: bbox[2],
-	            maxY: bbox[3]
-	        });
-	        for (var i = 0; i < result.length; i++) {
-	            if (polygonIntersectsBBox(result[i].coords, bbox)) {
-	                output.push(result[i].props);
-	            }
-	        }
-	        return output;
-	    };
+	  function vertexPointIssue(entity, graph) {
+	    // we only care about nodes
+	    if (entity.type !== 'node') return null; // ignore tagless points
 
-	    return query;
-	}
+	    if (Object.keys(entity.tags).length === 0) return null; // address lines are special so just ignore them
 
-	function polygonIntersectsBBox(polygon, bbox) {
-	    var bboxCenter = [
-	        (bbox[0] + bbox[2]) / 2,
-	        (bbox[1] + bbox[3]) / 2
-	    ];
-	    if (insidePolygon(polygon, bboxCenter)) { return true; }
-	    for (var i = 0; i < polygon.length; i++) {
-	        if (lineclip_1$1(polygon[i], bbox).length > 0) { return true; }
-	    }
-	    return false;
-	}
+	    if (entity.isOnAddressLine(graph)) return null;
+	    var geometry = entity.geometry(graph);
+	    var allowedGeometries = osmNodeGeometriesForTags(entity.tags);
 
-	// ray casting algorithm for detecting if point is in polygon
-	function insidePolygon(rings, p) {
-	    var inside = false;
-	    for (var i = 0, len = rings.length; i < len; i++) {
-	        var ring = rings[i];
-	        for (var j = 0, len2 = ring.length, k = len2 - 1; j < len2; k = j++) {
-	            if (rayIntersect(p, ring[j], ring[k])) { inside = !inside; }
-	        }
+	    if (geometry === 'point' && !allowedGeometries.point && allowedGeometries.vertex) {
+	      return new validationIssue({
+	        type: type,
+	        subtype: 'vertex_as_point',
+	        severity: 'warning',
+	        message: function message(context) {
+	          var entity = context.hasEntity(this.entityIds[0]);
+	          return entity ? _t.html('issues.vertex_as_point.message', {
+	            feature: utilDisplayLabel(entity, 'vertex', true
+	            /* verbose */
+	            )
+	          }) : '';
+	        },
+	        reference: function showReference(selection) {
+	          selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.vertex_as_point.reference'));
+	        },
+	        entityIds: [entity.id]
+	      });
+	    } else if (geometry === 'vertex' && !allowedGeometries.vertex && allowedGeometries.point) {
+	      return new validationIssue({
+	        type: type,
+	        subtype: 'point_as_vertex',
+	        severity: 'warning',
+	        message: function message(context) {
+	          var entity = context.hasEntity(this.entityIds[0]);
+	          return entity ? _t.html('issues.point_as_vertex.message', {
+	            feature: utilDisplayLabel(entity, 'point', true
+	            /* verbose */
+	            )
+	          }) : '';
+	        },
+	        reference: function showReference(selection) {
+	          selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.point_as_vertex.reference'));
+	        },
+	        entityIds: [entity.id],
+	        dynamicFixes: extractPointDynamicFixes
+	      });
 	    }
-	    return inside;
-	}
 
-	function rayIntersect(p, p1, p2) {
-	    return ((p1[1] > p[1]) !== (p2[1] > p[1])) && (p[0] < (p2[0] - p1[0]) * (p[1] - p1[1]) / (p2[1] - p1[1]) + p1[0]);
-	}
+	    return null;
+	  }
 
-	function treeItem(coords, props) {
-	    var item = {
-	        minX: Infinity,
-	        minY: Infinity,
-	        maxX: -Infinity,
-	        maxY: -Infinity,
-	        coords: coords,
-	        props: props
-	    };
+	  function otherMismatchIssue(entity, graph) {
+	    // ignore boring features
+	    if (!entity.hasInterestingTags()) return null;
+	    if (entity.type !== 'node' && entity.type !== 'way') return null; // address lines are special so just ignore them
+
+	    if (entity.type === 'node' && entity.isOnAddressLine(graph)) return null;
+	    var sourceGeom = entity.geometry(graph);
+	    var targetGeoms = entity.type === 'way' ? ['point', 'vertex'] : ['line', 'area'];
+	    if (sourceGeom === 'area') targetGeoms.unshift('line');
+	    var asSource = _mainPresetIndex.match(entity, graph);
+	    var targetGeom = targetGeoms.find(function (nodeGeom) {
+	      var asTarget = _mainPresetIndex.matchTags(entity.tags, nodeGeom);
+	      if (!asSource || !asTarget || asSource === asTarget || // sometimes there are two presets with the same tags for different geometries
+	      fastDeepEqual(asSource.tags, asTarget.tags)) return false;
+	      if (asTarget.isFallback()) return false;
+	      var primaryKey = Object.keys(asTarget.tags)[0]; // special case: buildings-as-points are discouraged by iD, but common in OSM, so ignore them
+
+	      if (primaryKey === 'building') return false;
+	      if (asTarget.tags[primaryKey] === '*') return false;
+	      return asSource.isFallback() || asSource.tags[primaryKey] === '*';
+	    });
+	    if (!targetGeom) return null;
+	    var subtype = targetGeom + '_as_' + sourceGeom;
+	    if (targetGeom === 'vertex') targetGeom = 'point';
+	    if (sourceGeom === 'vertex') sourceGeom = 'point';
+	    var referenceId = targetGeom + '_as_' + sourceGeom;
+	    var dynamicFixes;
 
-	    for (var i = 0; i < coords[0].length; i++) {
-	        var p = coords[0][i];
-	        item.minX = Math.min(item.minX, p[0]);
-	        item.minY = Math.min(item.minY, p[1]);
-	        item.maxX = Math.max(item.maxX, p[0]);
-	        item.maxY = Math.max(item.maxY, p[1]);
+	    if (targetGeom === 'point') {
+	      dynamicFixes = extractPointDynamicFixes;
+	    } else if (sourceGeom === 'area' && targetGeom === 'line') {
+	      dynamicFixes = lineToAreaDynamicFixes;
 	    }
-	    return item;
-	}
-
-	var type = "FeatureCollection";
-	var features = [{type:"Feature",properties:{m49:"680",wikidata:"Q3405693",nameEn:"Sark",country:"GB",groups:["GG","830","154","150"],level:"subterritory",driveSide:"left",roadSpeedUnit:"mph",callingCodes:["44 01481"]},geometry:{type:"MultiPolygon",coordinates:[[[[-2.36485,49.48223],[-2.65349,49.15373],[-2.09454,49.46288],[-2.36485,49.48223]]]]}},{type:"Feature",properties:{m49:"001",wikidata:"Q2",nameEn:"World",aliases:["Earth","Planet"],level:"world"},geometry:null},{type:"Feature",properties:{m49:"142",wikidata:"Q48",nameEn:"Asia",level:"region"},geometry:null},{type:"Feature",properties:{m49:"143",wikidata:"Q27275",nameEn:"Central Asia",groups:["142"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"145",wikidata:"Q27293",nameEn:"Western Asia",groups:["142"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"150",wikidata:"Q46",nameEn:"Europe",level:"region"},geometry:null},{type:"Feature",properties:{m49:"151",wikidata:"Q27468",nameEn:"Eastern 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America",groups:["419","019","003"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"021",wikidata:"Q2017699",nameEn:"Northern America",groups:["019","003"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"035",wikidata:"Q11708",nameEn:"South-eastern Asia",groups:["142"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"018",wikidata:"Q27394",nameEn:"Southern Africa",groups:["202","002"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"030",wikidata:"Q27231",nameEn:"Eastern Asia",groups:["142"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"015",wikidata:"Q27381",nameEn:"Northern 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-	var whichPolygonGetter = {};
-	var featuresByCode = {};
-	var idFilterRegex = /\bThe\b|\bthe\b|\band\b|\bof\b|[-_ .,()&[\]/]/g;
-	var levels = [
-	  'subterritory',
-	  'territory',
-	  'country',
-	  'intermediateRegion',
-	  'subregion',
-	  'region',
-	  'union',
-	  'world'
-	];
-	loadDerivedDataAndCaches(borders);
-	function loadDerivedDataAndCaches(borders) {
-	  var identifierProps = ['iso1A2', 'iso1A3', 'm49', 'wikidata', 'emojiFlag', 'nameEn'];
-	  var geometryFeatures = [];
-	  for (var i in borders.features) {
-	    var feature = borders.features[i];
-	    feature.properties.id = feature.properties.iso1A2 || feature.properties.m49;
-	    loadM49(feature);
-	    loadIsoStatus(feature);
-	    loadLevel(feature);
-	    loadGroups(feature);
-	    loadRoadSpeedUnit(feature);
-	    loadDriveSide(feature);
-	    loadFlag(feature);
-	    cacheFeatureByIDs(feature);
-	    if (feature.geometry) { geometryFeatures.push(feature); }
-	  }
-	  for (var i$1 in borders.features) {
-	    var feature$1 = borders.features[i$1];
-	    feature$1.properties.groups.sort(function(groupID1, groupID2) {
-	      return (
-	        levels.indexOf(featuresByCode[groupID1].properties.level) -
-	        levels.indexOf(featuresByCode[groupID2].properties.level)
-	      );
+	    return new validationIssue({
+	      type: type,
+	      subtype: subtype,
+	      severity: 'warning',
+	      message: function message(context) {
+	        var entity = context.hasEntity(this.entityIds[0]);
+	        return entity ? _t.html('issues.' + referenceId + '.message', {
+	          feature: utilDisplayLabel(entity, targetGeom, true
+	          /* verbose */
+	          )
+	        }) : '';
+	      },
+	      reference: function showReference(selection) {
+	        selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.mismatched_geometry.reference'));
+	      },
+	      entityIds: [entity.id],
+	      dynamicFixes: dynamicFixes
 	    });
-	    loadMembersForGroupsOf(feature$1);
 	  }
-	  var geometryOnlyCollection = {
-	    type: 'RegionFeatureCollection',
-	    features: geometryFeatures
-	  };
-	  whichPolygonGetter = whichPolygon_1(geometryOnlyCollection);
-	  function loadGroups(feature) {
-	    var props = feature.properties;
-	    if (!props.groups) {
-	      props.groups = [];
-	    }
-	    if (props.country) {
-	      props.groups.push(props.country);
-	    }
-	    if (props.m49 !== '001') {
-	      props.groups.push('001');
+
+	  function lineToAreaDynamicFixes(context) {
+	    var convertOnClick;
+	    var entityId = this.entityIds[0];
+	    var entity = context.entity(entityId);
+	    var tags = Object.assign({}, entity.tags); // shallow copy
+
+	    delete tags.area;
+
+	    if (!osmTagSuggestingArea(tags)) {
+	      // if removing the area tag would make this a line, offer that as a quick fix
+	      convertOnClick = function convertOnClick(context) {
+	        var entityId = this.issue.entityIds[0];
+	        var entity = context.entity(entityId);
+	        var tags = Object.assign({}, entity.tags); // shallow copy
+
+	        if (tags.area) {
+	          delete tags.area;
+	        }
+
+	        context.perform(actionChangeTags(entityId, tags), _t('issues.fix.convert_to_line.annotation'));
+	      };
 	    }
+
+	    return [new validationIssueFix({
+	      icon: 'iD-icon-line',
+	      title: _t.html('issues.fix.convert_to_line.title'),
+	      onClick: convertOnClick
+	    })];
 	  }
-	  function loadM49(feature) {
-	    var props = feature.properties;
-	    if (!props.m49 && props.iso1N3) {
-	      props.m49 = props.iso1N3;
+
+	  function extractPointDynamicFixes(context) {
+	    var entityId = this.entityIds[0];
+	    var extractOnClick = null;
+
+	    if (!context.hasHiddenConnections(entityId)) {
+	      extractOnClick = function extractOnClick(context) {
+	        var entityId = this.issue.entityIds[0];
+	        var action = actionExtract(entityId, context.projection);
+	        context.perform(action, _t('operations.extract.annotation', {
+	          n: 1
+	        })); // re-enter mode to trigger updates
+
+	        context.enter(modeSelect(context, [action.getExtractedNodeID()]));
+	      };
 	    }
+
+	    return [new validationIssueFix({
+	      icon: 'iD-operation-extract',
+	      title: _t.html('issues.fix.extract_point.title'),
+	      onClick: extractOnClick
+	    })];
 	  }
-	  function loadIsoStatus(feature) {
-	    var props = feature.properties;
-	    if (!props.isoStatus && props.iso1A2) {
-	      props.isoStatus = 'official';
+
+	  function unclosedMultipolygonPartIssues(entity, graph) {
+	    if (entity.type !== 'relation' || !entity.isMultipolygon() || entity.isDegenerate() || // cannot determine issues for incompletely-downloaded relations
+	    !entity.isComplete(graph)) return [];
+	    var sequences = osmJoinWays(entity.members, graph);
+	    var issues = [];
+
+	    for (var i in sequences) {
+	      var sequence = sequences[i];
+	      if (!sequence.nodes) continue;
+	      var firstNode = sequence.nodes[0];
+	      var lastNode = sequence.nodes[sequence.nodes.length - 1]; // part is closed if the first and last nodes are the same
+
+	      if (firstNode === lastNode) continue;
+	      var issue = new validationIssue({
+	        type: type,
+	        subtype: 'unclosed_multipolygon_part',
+	        severity: 'warning',
+	        message: function message(context) {
+	          var entity = context.hasEntity(this.entityIds[0]);
+	          return entity ? _t.html('issues.unclosed_multipolygon_part.message', {
+	            feature: utilDisplayLabel(entity, context.graph(), true
+	            /* verbose */
+	            )
+	          }) : '';
+	        },
+	        reference: showReference,
+	        loc: sequence.nodes[0].loc,
+	        entityIds: [entity.id],
+	        hash: sequence.map(function (way) {
+	          return way.id;
+	        }).join()
+	      });
+	      issues.push(issue);
 	    }
-	  }
-	  function loadLevel(feature) {
-	    var props = feature.properties;
-	    if (props.level) { return; }
-	    if (!props.country) {
-	      props.level = 'country';
-	    } else if (props.isoStatus === 'official') {
-	      props.level = 'territory';
-	    } else {
-	      props.level = 'subterritory';
+
+	    return issues;
+
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.unclosed_multipolygon_part.reference'));
 	    }
 	  }
-	  function loadRoadSpeedUnit(feature) {
-	    var props = feature.properties;
-	    if (props.roadSpeedUnit === undefined && props.iso1A2 && props.iso1A2 !== 'EU') {
-	      props.roadSpeedUnit = 'km/h';
+
+	  var validation = function checkMismatchedGeometry(entity, graph) {
+	    var vertexPoint = vertexPointIssue(entity, graph);
+	    if (vertexPoint) return [vertexPoint];
+	    var lineAsArea = lineTaggedAsAreaIssue(entity);
+	    if (lineAsArea) return [lineAsArea];
+	    var mismatch = otherMismatchIssue(entity, graph);
+	    if (mismatch) return [mismatch];
+	    return unclosedMultipolygonPartIssues(entity, graph);
+	  };
+
+	  validation.type = type;
+	  return validation;
+	}
+
+	function validationMissingRole() {
+	  var type = 'missing_role';
+
+	  var validation = function checkMissingRole(entity, graph) {
+	    var issues = [];
+
+	    if (entity.type === 'way') {
+	      graph.parentRelations(entity).forEach(function (relation) {
+	        if (!relation.isMultipolygon()) return;
+	        var member = relation.memberById(entity.id);
+
+	        if (member && isMissingRole(member)) {
+	          issues.push(makeIssue(entity, relation, member));
+	        }
+	      });
+	    } else if (entity.type === 'relation' && entity.isMultipolygon()) {
+	      entity.indexedMembers().forEach(function (member) {
+	        var way = graph.hasEntity(member.id);
+
+	        if (way && isMissingRole(member)) {
+	          issues.push(makeIssue(way, entity, member));
+	        }
+	      });
 	    }
+
+	    return issues;
+	  };
+
+	  function isMissingRole(member) {
+	    return !member.role || !member.role.trim().length;
 	  }
-	  function loadDriveSide(feature) {
-	    var props = feature.properties;
-	    if (props.driveSide === undefined && props.iso1A2 && props.iso1A2 !== 'EU') {
-	      props.driveSide = 'right';
+
+	  function makeIssue(way, relation, member) {
+	    return new validationIssue({
+	      type: type,
+	      severity: 'warning',
+	      message: function message(context) {
+	        var member = context.hasEntity(this.entityIds[1]),
+	            relation = context.hasEntity(this.entityIds[0]);
+	        return member && relation ? _t.html('issues.missing_role.message', {
+	          member: utilDisplayLabel(member, context.graph()),
+	          relation: utilDisplayLabel(relation, context.graph())
+	        }) : '';
+	      },
+	      reference: showReference,
+	      entityIds: [relation.id, way.id],
+	      data: {
+	        member: member
+	      },
+	      hash: member.index.toString(),
+	      dynamicFixes: function dynamicFixes() {
+	        return [makeAddRoleFix('inner'), makeAddRoleFix('outer'), new validationIssueFix({
+	          icon: 'iD-operation-delete',
+	          title: _t.html('issues.fix.remove_from_relation.title'),
+	          onClick: function onClick(context) {
+	            context.perform(actionDeleteMember(this.issue.entityIds[0], this.issue.data.member.index), _t('operations.delete_member.annotation', {
+	              n: 1
+	            }));
+	          }
+	        })];
+	      }
+	    });
+
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.missing_role.multipolygon.reference'));
 	    }
 	  }
-	  function loadFlag(feature) {
-	    if (!feature.properties.iso1A2) { return; }
-	    var flag = feature.properties.iso1A2.replace(/./g, function(char) {
-	      return String.fromCodePoint(char.charCodeAt(0) + 127397);
+
+	  function makeAddRoleFix(role) {
+	    return new validationIssueFix({
+	      title: _t.html('issues.fix.set_as_' + role + '.title'),
+	      onClick: function onClick(context) {
+	        var oldMember = this.issue.data.member;
+	        var member = {
+	          id: this.issue.entityIds[1],
+	          type: oldMember.type,
+	          role: role
+	        };
+	        context.perform(actionChangeMember(this.issue.entityIds[0], member, oldMember.index), _t('operations.change_role.annotation', {
+	          n: 1
+	        }));
+	      }
 	    });
-	    feature.properties.emojiFlag = flag;
 	  }
-	  function loadMembersForGroupsOf(feature) {
-	    var featureID = feature.properties.id;
-	    var standardizedGroupIDs = [];
-	    for (var j in feature.properties.groups) {
-	      var groupID = feature.properties.groups[j];
-	      var groupFeature = featuresByCode[groupID];
-	      standardizedGroupIDs.push(groupFeature.properties.id);
-	      if (groupFeature.properties.members) {
-	        groupFeature.properties.members.push(featureID);
-	      } else {
-	        groupFeature.properties.members = [featureID];
-	      }
+
+	  validation.type = type;
+	  return validation;
+	}
+
+	function validationMissingTag(context) {
+	  var type = 'missing_tag';
+
+	  function hasDescriptiveTags(entity, graph) {
+	    var onlyAttributeKeys = ['description', 'name', 'note', 'start_date'];
+	    var entityDescriptiveKeys = Object.keys(entity.tags).filter(function (k) {
+	      if (k === 'area' || !osmIsInterestingTag(k)) return false;
+	      return !onlyAttributeKeys.some(function (attributeKey) {
+	        return k === attributeKey || k.indexOf(attributeKey + ':') === 0;
+	      });
+	    });
+
+	    if (entity.type === 'relation' && entityDescriptiveKeys.length === 1 && entity.tags.type === 'multipolygon') {
+	      // this relation's only interesting tag just says its a multipolygon,
+	      // which is not descriptive enough
+	      // It's okay for a simple multipolygon to have no descriptive tags
+	      // if its outer way has them (old model, see `outdated_tags.js`)
+	      return osmOldMultipolygonOuterMemberOfRelation(entity, graph);
 	    }
-	    feature.properties.groups = standardizedGroupIDs;
+
+	    return entityDescriptiveKeys.length > 0;
 	  }
-	  function cacheFeatureByIDs(feature) {
-	    for (var k in identifierProps) {
-	      var prop = identifierProps[k];
-	      var id = prop && feature.properties[prop];
-	      if (id) {
-	        id = id.replace(idFilterRegex, '').toUpperCase();
-	        featuresByCode[id] = feature;
-	      }
-	    }
-	    if (feature.properties.aliases) {
-	      for (var j in feature.properties.aliases) {
-	        var alias = feature.properties.aliases[j].replace(idFilterRegex, '').toUpperCase();
-	        featuresByCode[alias] = feature;
-	      }
-	    }
+
+	  function isUnknownRoad(entity) {
+	    return entity.type === 'way' && entity.tags.highway === 'road';
 	  }
-	}
-	function locArray(loc) {
-	  if (Array.isArray(loc)) {
-	    return loc;
-	  } else if (loc.coordinates) {
-	    return loc.coordinates;
+
+	  function isUntypedRelation(entity) {
+	    return entity.type === 'relation' && !entity.tags.type;
 	  }
-	  return loc.geometry.coordinates;
-	}
-	function smallestFeature(loc) {
-	  var query = locArray(loc);
-	  var featureProperties = whichPolygonGetter(query);
-	  if (!featureProperties) { return null; }
-	  return featuresByCode[featureProperties.id];
-	}
-	function countryFeature(loc) {
-	  var feature = smallestFeature(loc);
-	  if (!feature) { return null; }
-	  var countryCode = feature.properties.country || feature.properties.iso1A2;
-	  return featuresByCode[countryCode];
-	}
-	function featureForLoc(loc, opts) {
-	  if (opts && opts.level && opts.level !== 'country') {
-	    var features = featuresContaining(loc);
-	    var targetLevel = opts.level;
-	    var targetLevelIndex = levels.indexOf(targetLevel);
-	    if (targetLevelIndex === -1) { return null; }
-	    for (var i in features) {
-	      var feature = features[i];
-	      if (
-	        feature.properties.level === targetLevel ||
-	        levels.indexOf(feature.properties.level) > targetLevelIndex
-	      ) {
-	        return feature;
+
+	  var validation = function checkMissingTag(entity, graph) {
+	    var subtype;
+	    var osm = context.connection();
+	    var isUnloadedNode = entity.type === 'node' && osm && !osm.isDataLoaded(entity.loc); // we can't know if the node is a vertex if the tile is undownloaded
+
+	    if (!isUnloadedNode && // allow untagged nodes that are part of ways
+	    entity.geometry(graph) !== 'vertex' && // allow untagged entities that are part of relations
+	    !entity.hasParentRelations(graph)) {
+	      if (Object.keys(entity.tags).length === 0) {
+	        subtype = 'any';
+	      } else if (!hasDescriptiveTags(entity, graph)) {
+	        subtype = 'descriptive';
+	      } else if (isUntypedRelation(entity)) {
+	        subtype = 'relation_type';
 	      }
+	    } // flag an unknown road even if it's a member of a relation
+
+
+	    if (!subtype && isUnknownRoad(entity)) {
+	      subtype = 'highway_classification';
 	    }
-	    return null;
-	  }
-	  return countryFeature(loc);
-	}
-	function featureForID(id) {
-	  var stringID;
-	  if (typeof id === 'number') {
-	    stringID = id.toString();
-	    if (stringID.length === 1) {
-	      stringID = '00' + stringID;
-	    } else if (stringID.length === 2) {
-	      stringID = '0' + stringID;
+
+	    if (!subtype) return [];
+	    var messageID = subtype === 'highway_classification' ? 'unknown_road' : 'missing_tag.' + subtype;
+	    var referenceID = subtype === 'highway_classification' ? 'unknown_road' : 'missing_tag'; // can always delete if the user created it in the first place..
+
+	    var canDelete = entity.version === undefined || entity.v !== undefined;
+	    var severity = canDelete && subtype !== 'highway_classification' ? 'error' : 'warning';
+	    return [new validationIssue({
+	      type: type,
+	      subtype: subtype,
+	      severity: severity,
+	      message: function message(context) {
+	        var entity = context.hasEntity(this.entityIds[0]);
+	        return entity ? _t.html('issues.' + messageID + '.message', {
+	          feature: utilDisplayLabel(entity, context.graph())
+	        }) : '';
+	      },
+	      reference: showReference,
+	      entityIds: [entity.id],
+	      dynamicFixes: function dynamicFixes(context) {
+	        var fixes = [];
+	        var selectFixType = subtype === 'highway_classification' ? 'select_road_type' : 'select_preset';
+	        fixes.push(new validationIssueFix({
+	          icon: 'iD-icon-search',
+	          title: _t.html('issues.fix.' + selectFixType + '.title'),
+	          onClick: function onClick(context) {
+	            context.ui().sidebar.showPresetList();
+	          }
+	        }));
+	        var deleteOnClick;
+	        var id = this.entityIds[0];
+	        var operation = operationDelete(context, [id]);
+	        var disabledReasonID = operation.disabled();
+
+	        if (!disabledReasonID) {
+	          deleteOnClick = function deleteOnClick(context) {
+	            var id = this.issue.entityIds[0];
+	            var operation = operationDelete(context, [id]);
+
+	            if (!operation.disabled()) {
+	              operation();
+	            }
+	          };
+	        }
+
+	        fixes.push(new validationIssueFix({
+	          icon: 'iD-operation-delete',
+	          title: _t.html('issues.fix.delete_feature.title'),
+	          disabledReason: disabledReasonID ? _t('operations.delete.' + disabledReasonID + '.single') : undefined,
+	          onClick: deleteOnClick
+	        }));
+	        return fixes;
+	      }
+	    })];
+
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.' + referenceID + '.reference'));
 	    }
-	  } else {
-	    stringID = id.replace(idFilterRegex, '').toUpperCase();
-	  }
-	  return featuresByCode[stringID] || null;
-	}
-	function smallestOrMatchingFeature(query) {
-	  if (typeof query === 'object') {
-	    return smallestFeature(query);
-	  }
-	  return featureForID(query);
-	}
-	function feature(query, opts) {
-	  if (typeof query === 'object') {
-	    return featureForLoc(query, opts);
-	  }
-	  return featureForID(query);
-	}
-	function iso1A2Code(query, opts) {
-	  var match = feature(query, opts);
-	  if (!match) { return null; }
-	  return match.properties.iso1A2 || null;
-	}
-	function featuresContaining(query, strict) {
-	  var feature = smallestOrMatchingFeature(query);
-	  if (!feature) { return []; }
-	  var features = [];
-	  if (!strict || typeof query === 'object') {
-	    features.push(feature);
-	  }
-	  var properties = feature.properties;
-	  for (var i in properties.groups) {
-	    var groupID = properties.groups[i];
-	    features.push(featuresByCode[groupID]);
-	  }
-	  return features;
-	}
-	function roadSpeedUnit(query) {
-	  var feature = smallestOrMatchingFeature(query);
-	  return (feature && feature.properties.roadSpeedUnit) || null;
-	}
+	  };
 
-	var _dataDeprecated;
-	var _nsi;
+	  validation.type = type;
+	  return validation;
+	}
 
 	function validationOutdatedTags() {
 	  var type = 'outdated_tags';
-	  var nsiKeys = ['amenity', 'shop', 'tourism', 'leisure', 'office'];
-
-	  // A concern here in switching to async data means that `_dataDeprecated`
-	  // and `_nsi` will not be available at first, so the data on early tiles
-	  // may not have tags validated fully.
-
-	  // initialize deprecated tags array
-	  _mainFileFetcher.get('deprecated')
-	    .then(function (d) { return _dataDeprecated = d; })
-	    .catch(function () { /* ignore */ });
-
-	  _mainFileFetcher.get('nsi_brands')
-	    .then(function (d) {
-	      _nsi = {
-	        brands: d.brands,
-	        matcher: matcher$1(),
-	        wikidata: {},
-	        wikipedia: {}
-	      };
-
-	      // initialize name-suggestion-index matcher
-	      _nsi.matcher.buildMatchIndex(d.brands);
+	  var _waitingForDeprecated = true;
 
-	      // index all known wikipedia and wikidata tags
-	      Object.keys(d.brands).forEach(function (kvnd) {
-	        var brand = d.brands[kvnd];
-	        var wd = brand.tags['brand:wikidata'];
-	        var wp = brand.tags['brand:wikipedia'];
-	        if (wd) { _nsi.wikidata[wd] = kvnd; }
-	        if (wp) { _nsi.wikipedia[wp] = kvnd; }
-	      });
+	  var _dataDeprecated; // fetch deprecated tags
 
-	      return _nsi;
-	    })
-	    .catch(function () { /* ignore */ });
 
+	  _mainFileFetcher.get('deprecated').then(function (d) {
+	    return _dataDeprecated = d;
+	  })["catch"](function () {
+	    /* ignore */
+	  })["finally"](function () {
+	    return _waitingForDeprecated = false;
+	  });
 
 	  function oldTagIssues(entity, graph) {
-	    var oldTags = Object.assign({}, entity.tags);  // shallow copy
+	    var oldTags = Object.assign({}, entity.tags); // shallow copy
+
 	    var preset = _mainPresetIndex.match(entity, graph);
 	    var subtype = 'deprecated_tags';
-	    if (!preset) { return []; }
+	    if (!preset) return [];
+	    if (!entity.hasInterestingTags()) return []; // Upgrade preset, if a replacement is available..
 
-	    // upgrade preset..
 	    if (preset.replacement) {
 	      var newPreset = _mainPresetIndex.item(preset.replacement);
-	      graph = actionChangePreset(entity.id, preset, newPreset, true /* skip field defaults */)(graph);
+	      graph = actionChangePreset(entity.id, preset, newPreset, true
+	      /* skip field defaults */
+	      )(graph);
 	      entity = graph.entity(entity.id);
 	      preset = newPreset;
-	    }
+	    } // Upgrade deprecated tags..
+
 
-	    // upgrade tags..
 	    if (_dataDeprecated) {
 	      var deprecatedTags = entity.deprecatedTags(_dataDeprecated);
+
 	      if (deprecatedTags.length) {
 	        deprecatedTags.forEach(function (tag) {
 	          graph = actionUpgradeTags(entity.id, tag.old, tag.replace)(graph);
 	        });
 	        entity = graph.entity(entity.id);
 	      }
-	    }
+	    } // Add missing addTags from the detected preset
+
+
+	    var newTags = Object.assign({}, entity.tags); // shallow copy
 
-	    // add missing addTags..
-	    var newTags = Object.assign({}, entity.tags);  // shallow copy
 	    if (preset.tags !== preset.addTags) {
 	      Object.keys(preset.addTags).forEach(function (k) {
 	        if (!newTags[k]) {
@@ -60791,110 +58596,85 @@
 	          }
 	        }
 	      });
-	    }
-
-	    if (_nsi) {
-	      // Do `wikidata` or `wikipedia` identify this entity as a brand?  #6416
-	      // If so, these tags can be swapped to `brand:wikidata`/`brand:wikipedia`
-	      var isBrand;
-	      if (newTags.wikidata) {                 // try matching `wikidata`
-	        isBrand = _nsi.wikidata[newTags.wikidata];
-	      }
-	      if (!isBrand && newTags.wikipedia) {    // fallback to `wikipedia`
-	        isBrand = _nsi.wikipedia[newTags.wikipedia];
-	      }
-	      if (isBrand && !newTags.office) {       // but avoid doing this for corporate offices
-	        if (newTags.wikidata) {
-	          newTags['brand:wikidata'] = newTags.wikidata;
-	          delete newTags.wikidata;
-	        }
-	        if (newTags.wikipedia) {
-	          newTags['brand:wikipedia'] = newTags.wikipedia;
-	          delete newTags.wikipedia;
-	        }
-	        // I considered setting `name` and other tags here, but they aren't unique per wikidata
-	        // (Q2759586 -> in USA "Papa John's", in Russia "Папа Джонс")
-	        // So users will really need to use a preset or assign `name` themselves.
-	      }
-
-	      // try key/value|name match against name-suggestion-index
-	      if (newTags.name) {
-	        for (var i = 0; i < nsiKeys.length; i++) {
-	          var k = nsiKeys[i];
-	          if (!newTags[k]) { continue; }
+	    } // Attempt to match a canonical record in the name-suggestion-index.
 
-	          var center = entity.extent(graph).center();
-	          var countryCode = iso1A2Code(center);
-	          var match = _nsi.matcher.matchKVN(k, newTags[k], newTags.name, countryCode && countryCode.toLowerCase());
-	          if (!match) { continue; }
 
-	          // for now skip ambiguous matches (like Target~(USA) vs Target~(Australia))
-	          if (match.d) { continue; }
+	    var nsi = services.nsi;
+	    var waitingForNsi = false;
+	    var nsiResult;
 
-	          var brand = _nsi.brands[match.kvnd];
-	          if (brand && brand.tags['brand:wikidata'] &&
-	            brand.tags['brand:wikidata'] !== entity.tags['not:brand:wikidata']) {
-	            subtype = 'noncanonical_brand';
+	    if (nsi) {
+	      waitingForNsi = nsi.status() === 'loading';
 
-	            var keepTags = ['takeaway'].reduce(function (acc, k) {
-	              if (newTags[k]) {
-	                acc[k] = newTags[k];
-	              }
-	              return acc;
-	            }, {});
+	      if (!waitingForNsi) {
+	        var loc = entity.extent(graph).center();
+	        nsiResult = nsi.upgradeTags(newTags, loc);
 
-	            nsiKeys.forEach(function (k) { return delete newTags[k]; });
-	            Object.assign(newTags, brand.tags, keepTags);
-	            break;
-	          }
+	        if (nsiResult) {
+	          newTags = nsiResult.newTags;
+	          subtype = 'noncanonical_brand';
 	        }
 	      }
 	    }
 
-	    // determine diff
-	    var tagDiff = utilTagDiff(oldTags, newTags);
-	    if (!tagDiff.length) { return []; }
-
-	    var isOnlyAddingTags = tagDiff.every(function (d) { return d.type === '+'; });
+	    var issues = [];
+	    issues.provisional = _waitingForDeprecated || waitingForNsi; // determine diff
 
+	    var tagDiff = utilTagDiff(oldTags, newTags);
+	    if (!tagDiff.length) return issues;
+	    var isOnlyAddingTags = tagDiff.every(function (d) {
+	      return d.type === '+';
+	    });
 	    var prefix = '';
-	    if (subtype === 'noncanonical_brand') {
+
+	    if (nsiResult) {
 	      prefix = 'noncanonical_brand.';
 	    } else if (subtype === 'deprecated_tags' && isOnlyAddingTags) {
 	      subtype = 'incomplete_tags';
 	      prefix = 'incomplete.';
-	    }
+	    } // don't allow autofixing brand tags
 
-	    // don't allow autofixing brand tags
-	    var autoArgs = subtype !== 'noncanonical_brand' ? [doUpgrade, _t('issues.fix.upgrade_tags.annotation')] : null;
 
-	    return [new validationIssue({
+	    var autoArgs = subtype !== 'noncanonical_brand' ? [doUpgrade, _t('issues.fix.upgrade_tags.annotation')] : null;
+	    issues.push(new validationIssue({
 	      type: type,
 	      subtype: subtype,
 	      severity: 'warning',
 	      message: showMessage,
 	      reference: showReference,
 	      entityIds: [entity.id],
-	      hash: JSON.stringify(tagDiff),
-	      dynamicFixes: function () {
-	        return [
-	          new validationIssueFix({
-	            autoArgs: autoArgs,
-	            title: _t('issues.fix.upgrade_tags.title'),
-	            onClick: function (context) {
-	              context.perform(doUpgrade, _t('issues.fix.upgrade_tags.annotation'));
+	      hash: utilHashcode(JSON.stringify(tagDiff)),
+	      dynamicFixes: function dynamicFixes() {
+	        var fixes = [new validationIssueFix({
+	          autoArgs: autoArgs,
+	          title: _t.html('issues.fix.upgrade_tags.title'),
+	          onClick: function onClick(context) {
+	            context.perform(doUpgrade, _t('issues.fix.upgrade_tags.annotation'));
+	          }
+	        })];
+	        var item = nsiResult && nsiResult.matched;
+
+	        if (item) {
+	          fixes.push(new validationIssueFix({
+	            title: _t.html('issues.fix.tag_as_not.title', {
+	              name: item.displayName
+	            }),
+	            onClick: function onClick(context) {
+	              context.perform(addNotTag, _t('issues.fix.tag_as_not.annotation'));
 	            }
-	          })
-	        ];
-	      }
-	    })];
+	          }));
+	        }
 
+	        return fixes;
+	      }
+	    }));
+	    return issues;
 
 	    function doUpgrade(graph) {
 	      var currEntity = graph.hasEntity(entity.id);
-	      if (!currEntity) { return graph; }
+	      if (!currEntity) return graph;
+	      var newTags = Object.assign({}, currEntity.tags); // shallow copy
 
-	      var newTags = Object.assign({}, currEntity.tags);  // shallow copy
 	      tagDiff.forEach(function (diff) {
 	        if (diff.type === '-') {
 	          delete newTags[diff.key];
@@ -60902,57 +58682,66 @@
 	          newTags[diff.key] = diff.newVal;
 	        }
 	      });
-
 	      return actionChangeTags(currEntity.id, newTags)(graph);
 	    }
 
+	    function addNotTag(graph) {
+	      var currEntity = graph.hasEntity(entity.id);
+	      if (!currEntity) return graph;
+	      var item = nsiResult && nsiResult.matched;
+	      if (!item) return graph;
+	      var newTags = Object.assign({}, currEntity.tags); // shallow copy
+
+	      var wd = item.mainTag; // e.g. `brand:wikidata`
+
+	      var notwd = "not:".concat(wd); // e.g. `not:brand:wikidata`
+
+	      var qid = item.tags[wd];
+	      newTags[notwd] = qid;
+
+	      if (newTags[wd] === qid) {
+	        // if `brand:wikidata` was set to that qid
+	        var wp = item.mainTag.replace('wikidata', 'wikipedia');
+	        delete newTags[wd]; // remove `brand:wikidata`
+
+	        delete newTags[wp]; // remove `brand:wikipedia`
+	      }
+
+	      return actionChangeTags(currEntity.id, newTags)(graph);
+	    }
 
 	    function showMessage(context) {
 	      var currEntity = context.hasEntity(entity.id);
-	      if (!currEntity) { return ''; }
+	      if (!currEntity) return '';
+	      var messageID = "issues.outdated_tags.".concat(prefix, "message");
 
-	      var messageID = "issues.outdated_tags." + prefix + "message";
 	      if (subtype === 'noncanonical_brand' && isOnlyAddingTags) {
 	        messageID += '_incomplete';
 	      }
-	      return _t(messageID, { feature: utilDisplayLabel(currEntity, context.graph()) });
-	    }
 
+	      return _t.html(messageID, {
+	        feature: utilDisplayLabel(currEntity, context.graph(), true
+	        /* verbose */
+	        )
+	      });
+	    }
 
 	    function showReference(selection) {
-	      var enter = selection.selectAll('.issue-reference')
-	        .data([0])
-	        .enter();
-
-	      enter
-	        .append('div')
-	        .attr('class', 'issue-reference')
-	        .text(_t(("issues.outdated_tags." + prefix + "reference")));
-
-	      enter
-	        .append('strong')
-	        .text(_t('issues.suggested'));
-
-	      enter
-	        .append('table')
-	        .attr('class', 'tagDiff-table')
-	        .selectAll('.tagDiff-row')
-	        .data(tagDiff)
-	        .enter()
-	        .append('tr')
-	        .attr('class', 'tagDiff-row')
-	        .append('td')
-	        .attr('class', function (d) {
-	          var klass = d.type === '+' ? 'add' : 'remove';
-	          return ("tagDiff-cell tagDiff-cell-" + klass);
-	        })
-	        .text(function (d) { return d.display; });
+	      var enter = selection.selectAll('.issue-reference').data([0]).enter();
+	      enter.append('div').attr('class', 'issue-reference').html(_t.html("issues.outdated_tags.".concat(prefix, "reference")));
+	      enter.append('strong').html(_t.html('issues.suggested'));
+	      enter.append('table').attr('class', 'tagDiff-table').selectAll('.tagDiff-row').data(tagDiff).enter().append('tr').attr('class', 'tagDiff-row').append('td').attr('class', function (d) {
+	        var klass = d.type === '+' ? 'add' : 'remove';
+	        return "tagDiff-cell tagDiff-cell-".concat(klass);
+	      }).html(function (d) {
+	        return d.display;
+	      });
 	    }
 	  }
 
-
 	  function oldMultipolygonIssues(entity, graph) {
 	    var multipolygon, outerWay;
+
 	    if (entity.type === 'relation') {
 	      outerWay = osmOldMultipolygonOuterMemberOfRelation(entity, graph);
 	      multipolygon = entity;
@@ -60963,8 +58752,7 @@
 	      return [];
 	    }
 
-	    if (!multipolygon || !outerWay) { return []; }
-
+	    if (!multipolygon || !outerWay) return [];
 	    return [new validationIssue({
 	      type: type,
 	      subtype: 'old_multipolygon',
@@ -60972,247 +58760,196 @@
 	      message: showMessage,
 	      reference: showReference,
 	      entityIds: [outerWay.id, multipolygon.id],
-	      dynamicFixes: function () {
-	        return [
-	          new validationIssueFix({
-	            autoArgs: [doUpgrade, _t('issues.fix.move_tags.annotation')],
-	            title: _t('issues.fix.move_tags.title'),
-	            onClick: function (context) {
-	              context.perform(doUpgrade, _t('issues.fix.move_tags.annotation'));
-	            }
-	          })
-	        ];
+	      dynamicFixes: function dynamicFixes() {
+	        return [new validationIssueFix({
+	          autoArgs: [doUpgrade, _t('issues.fix.move_tags.annotation')],
+	          title: _t.html('issues.fix.move_tags.title'),
+	          onClick: function onClick(context) {
+	            context.perform(doUpgrade, _t('issues.fix.move_tags.annotation'));
+	          }
+	        })];
 	      }
 	    })];
 
-
 	    function doUpgrade(graph) {
 	      var currMultipolygon = graph.hasEntity(multipolygon.id);
 	      var currOuterWay = graph.hasEntity(outerWay.id);
-	      if (!currMultipolygon || !currOuterWay) { return graph; }
-
+	      if (!currMultipolygon || !currOuterWay) return graph;
 	      currMultipolygon = currMultipolygon.mergeTags(currOuterWay.tags);
 	      graph = graph.replace(currMultipolygon);
 	      return actionChangeTags(currOuterWay.id, {})(graph);
 	    }
 
-
 	    function showMessage(context) {
 	      var currMultipolygon = context.hasEntity(multipolygon.id);
-	      if (!currMultipolygon) { return ''; }
-
-	      return _t('issues.old_multipolygon.message',
-	          { multipolygon: utilDisplayLabel(currMultipolygon, context.graph()) }
-	      );
+	      if (!currMultipolygon) return '';
+	      return _t.html('issues.old_multipolygon.message', {
+	        multipolygon: utilDisplayLabel(currMultipolygon, context.graph(), true
+	        /* verbose */
+	        )
+	      });
 	    }
 
-
 	    function showReference(selection) {
-	      selection.selectAll('.issue-reference')
-	        .data([0])
-	        .enter()
-	        .append('div')
-	        .attr('class', 'issue-reference')
-	        .text(_t('issues.old_multipolygon.reference'));
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.old_multipolygon.reference'));
 	    }
 	  }
 
-
 	  var validation = function checkOutdatedTags(entity, graph) {
 	    var issues = oldMultipolygonIssues(entity, graph);
-	    if (!issues.length) { issues = oldTagIssues(entity, graph); }
+	    if (!issues.length) issues = oldTagIssues(entity, graph);
 	    return issues;
 	  };
 
-
 	  validation.type = type;
-
 	  return validation;
 	}
 
 	function validationPrivateData() {
-	    var type = 'private_data';
-
-	    // assume that some buildings are private
-	    var privateBuildingValues = {
-	        detached: true,
-	        farm: true,
-	        house: true,
-	        houseboat: true,
-	        residential: true,
-	        semidetached_house: true,
-	        static_caravan: true
-	    };
-
-	    // but they might be public if they have one of these other tags
-	    var publicKeys = {
-	        amenity: true,
-	        craft: true,
-	        historic: true,
-	        leisure: true,
-	        office: true,
-	        shop: true,
-	        tourism: true
-	    };
-
-	    // these tags may contain personally identifying info
-	    var personalTags = {
-	        'contact:email': true,
-	        'contact:fax': true,
-	        'contact:phone': true,
-	        email: true,
-	        fax: true,
-	        phone: true
-	    };
-
-
-	    var validation = function checkPrivateData(entity) {
-	        var tags = entity.tags;
-	        if (!tags.building || !privateBuildingValues[tags.building]) { return []; }
-
-	        var keepTags = {};
-	        for (var k in tags) {
-	            if (publicKeys[k]) { return []; }  // probably a public feature
-	            if (!personalTags[k]) {
-	                keepTags[k] = tags[k];
-	            }
-	        }
+	  var type = 'private_data'; // assume that some buildings are private
+
+	  var privateBuildingValues = {
+	    detached: true,
+	    farm: true,
+	    house: true,
+	    houseboat: true,
+	    residential: true,
+	    semidetached_house: true,
+	    static_caravan: true
+	  }; // but they might be public if they have one of these other tags
+
+	  var publicKeys = {
+	    amenity: true,
+	    craft: true,
+	    historic: true,
+	    leisure: true,
+	    office: true,
+	    shop: true,
+	    tourism: true
+	  }; // these tags may contain personally identifying info
+
+	  var personalTags = {
+	    'contact:email': true,
+	    'contact:fax': true,
+	    'contact:phone': true,
+	    email: true,
+	    fax: true,
+	    phone: true
+	  };
+
+	  var validation = function checkPrivateData(entity) {
+	    var tags = entity.tags;
+	    if (!tags.building || !privateBuildingValues[tags.building]) return [];
+	    var keepTags = {};
 
-	        var tagDiff = utilTagDiff(tags, keepTags);
-	        if (!tagDiff.length) { return []; }
+	    for (var k in tags) {
+	      if (publicKeys[k]) return []; // probably a public feature
 
-	        var fixID = tagDiff.length === 1 ? 'remove_tag' : 'remove_tags';
+	      if (!personalTags[k]) {
+	        keepTags[k] = tags[k];
+	      }
+	    }
 
-	        return [new validationIssue({
-	            type: type,
-	            severity: 'warning',
-	            message: showMessage,
-	            reference: showReference,
-	            entityIds: [entity.id],
-	            dynamicFixes: function() {
-	                return [
-	                    new validationIssueFix({
-	                        icon: 'iD-operation-delete',
-	                        title: _t('issues.fix.' + fixID + '.title'),
-	                        onClick: function(context) {
-	                            context.perform(doUpgrade, _t('issues.fix.upgrade_tags.annotation'));
-	                        }
-	                    })
-	                ];
-	            }
+	    var tagDiff = utilTagDiff(tags, keepTags);
+	    if (!tagDiff.length) return [];
+	    var fixID = tagDiff.length === 1 ? 'remove_tag' : 'remove_tags';
+	    return [new validationIssue({
+	      type: type,
+	      severity: 'warning',
+	      message: showMessage,
+	      reference: showReference,
+	      entityIds: [entity.id],
+	      dynamicFixes: function dynamicFixes() {
+	        return [new validationIssueFix({
+	          icon: 'iD-operation-delete',
+	          title: _t.html('issues.fix.' + fixID + '.title'),
+	          onClick: function onClick(context) {
+	            context.perform(doUpgrade, _t('issues.fix.upgrade_tags.annotation'));
+	          }
 	        })];
+	      }
+	    })];
 
+	    function doUpgrade(graph) {
+	      var currEntity = graph.hasEntity(entity.id);
+	      if (!currEntity) return graph;
+	      var newTags = Object.assign({}, currEntity.tags); // shallow copy
 
-	        function doUpgrade(graph) {
-	            var currEntity = graph.hasEntity(entity.id);
-	            if (!currEntity) { return graph; }
-
-	            var newTags = Object.assign({}, currEntity.tags);  // shallow copy
-	            tagDiff.forEach(function(diff) {
-	                if (diff.type === '-') {
-	                    delete newTags[diff.key];
-	                } else if (diff.type === '+') {
-	                    newTags[diff.key] = diff.newVal;
-	                }
-	            });
-
-	            return actionChangeTags(currEntity.id, newTags)(graph);
-	        }
-
-
-	        function showMessage(context) {
-	            var currEntity = context.hasEntity(this.entityIds[0]);
-	            if (!currEntity) { return ''; }
-
-	            return _t('issues.private_data.contact.message',
-	                { feature: utilDisplayLabel(currEntity, context.graph()) }
-	            );
-	        }
-
-
-	        function showReference(selection) {
-	            var enter = selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter();
-
-	            enter
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.private_data.reference'));
-
-	            enter
-	                .append('strong')
-	                .text(_t('issues.suggested'));
-
-	            enter
-	                .append('table')
-	                .attr('class', 'tagDiff-table')
-	                .selectAll('.tagDiff-row')
-	                .data(tagDiff)
-	                .enter()
-	                .append('tr')
-	                .attr('class', 'tagDiff-row')
-	                .append('td')
-	                .attr('class', function(d) {
-	                    var klass = d.type === '+' ? 'add' : 'remove';
-	                    return 'tagDiff-cell tagDiff-cell-' + klass;
-	                })
-	                .text(function(d) { return d.display; });
+	      tagDiff.forEach(function (diff) {
+	        if (diff.type === '-') {
+	          delete newTags[diff.key];
+	        } else if (diff.type === '+') {
+	          newTags[diff.key] = diff.newVal;
 	        }
-	    };
+	      });
+	      return actionChangeTags(currEntity.id, newTags)(graph);
+	    }
 
+	    function showMessage(context) {
+	      var currEntity = context.hasEntity(this.entityIds[0]);
+	      if (!currEntity) return '';
+	      return _t.html('issues.private_data.contact.message', {
+	        feature: utilDisplayLabel(currEntity, context.graph())
+	      });
+	    }
 
-	    validation.type = type;
+	    function showReference(selection) {
+	      var enter = selection.selectAll('.issue-reference').data([0]).enter();
+	      enter.append('div').attr('class', 'issue-reference').html(_t.html('issues.private_data.reference'));
+	      enter.append('strong').html(_t.html('issues.suggested'));
+	      enter.append('table').attr('class', 'tagDiff-table').selectAll('.tagDiff-row').data(tagDiff).enter().append('tr').attr('class', 'tagDiff-row').append('td').attr('class', function (d) {
+	        var klass = d.type === '+' ? 'add' : 'remove';
+	        return 'tagDiff-cell tagDiff-cell-' + klass;
+	      }).html(function (d) {
+	        return d.display;
+	      });
+	    }
+	  };
 
-	    return validation;
+	  validation.type = type;
+	  return validation;
 	}
 
-	var _discardNameRegexes = [];
-
 	function validationSuspiciousName() {
 	  var type = 'suspicious_name';
-	  var keysToTestForGenericValues = [
-	    'aerialway', 'aeroway', 'amenity', 'building', 'craft', 'highway',
-	    'leisure', 'railway', 'man_made', 'office', 'shop', 'tourism', 'waterway'
-	  ];
+	  var keysToTestForGenericValues = ['aerialway', 'aeroway', 'amenity', 'building', 'craft', 'highway', 'leisure', 'railway', 'man_made', 'office', 'shop', 'tourism', 'waterway'];
+	  var _waitingForNsi = false; // Attempt to match a generic record in the name-suggestion-index.
 
-	  // A concern here in switching to async data means that `_nsiFilters` will not
-	  // be available at first, so the data on early tiles may not have tags validated fully.
+	  function isGenericMatchInNsi(tags) {
+	    var nsi = services.nsi;
 
-	  _mainFileFetcher.get('nsi_filters')
-	    .then(function (filters) {
-	      // known list of generic names (e.g. "bar")
-	      _discardNameRegexes = filters.discardNames
-	        .map(function (discardName) { return new RegExp(discardName, 'i'); });
-	    })
-	    .catch(function () { /* ignore */ });
+	    if (nsi) {
+	      _waitingForNsi = nsi.status() === 'loading';
 
+	      if (!_waitingForNsi) {
+	        return nsi.isGenericName(tags);
+	      }
+	    }
+
+	    return false;
+	  } // Test if the name is just the key or tag value (e.g. "park")
 
-	  function isDiscardedSuggestionName(lowercaseName) {
-	    return _discardNameRegexes.some(function (regex) { return regex.test(lowercaseName); });
-	  }
 
-	  // test if the name is just the key or tag value (e.g. "park")
 	  function nameMatchesRawTag(lowercaseName, tags) {
 	    for (var i = 0; i < keysToTestForGenericValues.length; i++) {
 	      var key = keysToTestForGenericValues[i];
 	      var val = tags[key];
+
 	      if (val) {
 	        val = val.toLowerCase();
-	        if (key === lowercaseName ||
-	          val === lowercaseName ||
-	          key.replace(/\_/g, ' ') === lowercaseName ||
-	          val.replace(/\_/g, ' ') === lowercaseName) {
+
+	        if (key === lowercaseName || val === lowercaseName || key.replace(/\_/g, ' ') === lowercaseName || val.replace(/\_/g, ' ') === lowercaseName) {
 	          return true;
 	        }
 	      }
 	    }
+
 	    return false;
 	  }
 
 	  function isGenericName(name, tags) {
 	    name = name.toLowerCase();
-	    return nameMatchesRawTag(name, tags) || isDiscardedSuggestionName(name);
+	    return nameMatchesRawTag(name, tags) || isGenericMatchInNsi(tags);
 	  }
 
 	  function makeGenericNameIssue(entityId, nameKey, genericName, langCode) {
@@ -61220,44 +58957,38 @@
 	      type: type,
 	      subtype: 'generic_name',
 	      severity: 'warning',
-	      message: function(context) {
+	      message: function message(context) {
 	        var entity = context.hasEntity(this.entityIds[0]);
-	        if (!entity) { return ''; }
+	        if (!entity) return '';
 	        var preset = _mainPresetIndex.match(entity, context.graph());
 	        var langName = langCode && _mainLocalizer.languageName(langCode);
-	        return _t('issues.generic_name.message' + (langName ? '_language' : ''),
-	          { feature: preset.name(), name: genericName, language: langName }
-	        );
+	        return _t.html('issues.generic_name.message' + (langName ? '_language' : ''), {
+	          feature: preset.name(),
+	          name: genericName,
+	          language: langName
+	        });
 	      },
 	      reference: showReference,
 	      entityIds: [entityId],
-	      hash: nameKey + '=' + genericName,
-	      dynamicFixes: function() {
-	        return [
-	          new validationIssueFix({
-	            icon: 'iD-operation-delete',
-	            title: _t('issues.fix.remove_the_name.title'),
-	            onClick: function(context) {
-	              var entityId = this.issue.entityIds[0];
-	              var entity = context.entity(entityId);
-	              var tags = Object.assign({}, entity.tags);   // shallow copy
-	              delete tags[nameKey];
-	              context.perform(
-	                actionChangeTags(entityId, tags), _t('issues.fix.remove_generic_name.annotation')
-	              );
-	            }
-	          })
-	        ];
+	      hash: "".concat(nameKey, "=").concat(genericName),
+	      dynamicFixes: function dynamicFixes() {
+	        return [new validationIssueFix({
+	          icon: 'iD-operation-delete',
+	          title: _t.html('issues.fix.remove_the_name.title'),
+	          onClick: function onClick(context) {
+	            var entityId = this.issue.entityIds[0];
+	            var entity = context.entity(entityId);
+	            var tags = Object.assign({}, entity.tags); // shallow copy
+
+	            delete tags[nameKey];
+	            context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_generic_name.annotation'));
+	          }
+	        })];
 	      }
 	    });
 
 	    function showReference(selection) {
-	      selection.selectAll('.issue-reference')
-	        .data([0])
-	        .enter()
-	        .append('div')
-	        .attr('class', 'issue-reference')
-	        .text(_t('issues.generic_name.reference'));
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.generic_name.reference'));
 	    }
 	  }
 
@@ -61266,71 +58997,69 @@
 	      type: type,
 	      subtype: 'not_name',
 	      severity: 'warning',
-	      message: function(context) {
+	      message: function message(context) {
 	        var entity = context.hasEntity(this.entityIds[0]);
-	        if (!entity) { return ''; }
+	        if (!entity) return '';
 	        var preset = _mainPresetIndex.match(entity, context.graph());
 	        var langName = langCode && _mainLocalizer.languageName(langCode);
-	        return _t('issues.incorrect_name.message' + (langName ? '_language' : ''),
-	          { feature: preset.name(), name: incorrectName, language: langName }
-	        );
+	        return _t.html('issues.incorrect_name.message' + (langName ? '_language' : ''), {
+	          feature: preset.name(),
+	          name: incorrectName,
+	          language: langName
+	        });
 	      },
 	      reference: showReference,
 	      entityIds: [entityId],
-	      hash: nameKey + '=' + incorrectName,
-	      dynamicFixes: function() {
-	        return [
-	          new validationIssueFix({
-	            icon: 'iD-operation-delete',
-	            title: _t('issues.fix.remove_the_name.title'),
-	            onClick: function(context) {
-	              var entityId = this.issue.entityIds[0];
-	              var entity = context.entity(entityId);
-	              var tags = Object.assign({}, entity.tags);   // shallow copy
-	              delete tags[nameKey];
-	              context.perform(
-	                actionChangeTags(entityId, tags), _t('issues.fix.remove_mistaken_name.annotation')
-	              );
-	            }
-	          })
-	        ];
+	      hash: "".concat(nameKey, "=").concat(incorrectName),
+	      dynamicFixes: function dynamicFixes() {
+	        return [new validationIssueFix({
+	          icon: 'iD-operation-delete',
+	          title: _t.html('issues.fix.remove_the_name.title'),
+	          onClick: function onClick(context) {
+	            var entityId = this.issue.entityIds[0];
+	            var entity = context.entity(entityId);
+	            var tags = Object.assign({}, entity.tags); // shallow copy
+
+	            delete tags[nameKey];
+	            context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_mistaken_name.annotation'));
+	          }
+	        })];
 	      }
 	    });
 
 	    function showReference(selection) {
-	      selection.selectAll('.issue-reference')
-	        .data([0])
-	        .enter()
-	        .append('div')
-	        .attr('class', 'issue-reference')
-	        .text(_t('issues.generic_name.reference'));
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.generic_name.reference'));
 	    }
 	  }
 
-
 	  var validation = function checkGenericName(entity) {
-	    // a generic name is okay if it's a known brand or entity
-	    if (entity.hasWikidata()) { return []; }
+	    var tags = entity.tags; // a generic name is allowed if it's a known brand or entity
 
+	    var hasWikidata = !!tags.wikidata || !!tags['brand:wikidata'] || !!tags['operator:wikidata'];
+	    if (hasWikidata) return [];
 	    var issues = [];
-	    var notNames = (entity.tags['not:name'] || '').split(';');
+	    var notNames = (tags['not:name'] || '').split(';');
 
-	    for (var key in entity.tags) {
+	    for (var key in tags) {
 	      var m = key.match(/^name(?:(?::)([a-zA-Z_-]+))?$/);
-	      if (!m) { continue; }
-
+	      if (!m) continue;
 	      var langCode = m.length >= 2 ? m[1] : null;
-	      var value = entity.tags[key];
+	      var value = tags[key];
+
 	      if (notNames.length) {
 	        for (var i in notNames) {
 	          var notName = notNames[i];
+
 	          if (notName && value === notName) {
 	            issues.push(makeIncorrectNameIssue(entity.id, key, value, langCode));
 	            continue;
 	          }
 	        }
 	      }
-	      if (isGenericName(value, entity.tags)) {
+
+	      if (isGenericName(value, tags)) {
+	        issues.provisional = _waitingForNsi; // retry later if we are waiting on NSI to finish loading
+
 	        issues.push(makeGenericNameIssue(entity.id, key, value, langCode));
 	      }
 	    }
@@ -61338,119 +59067,126 @@
 	    return issues;
 	  };
 
-
 	  validation.type = type;
-
 	  return validation;
 	}
 
 	function validationUnsquareWay(context) {
-	    var type = 'unsquare_way';
-	    var DEFAULT_DEG_THRESHOLD = 5;   // see also issues.js
+	  var type = 'unsquare_way';
+	  var DEFAULT_DEG_THRESHOLD = 5; // see also issues.js
+	  // use looser epsilon for detection to reduce warnings of buildings that are essentially square already
 
-	    // use looser epsilon for detection to reduce warnings of buildings that are essentially square already
-	    var epsilon = 0.05;
-	    var nodeThreshold = 10;
-
-	    function isBuilding(entity, graph) {
-	        if (entity.type !== 'way' || entity.geometry(graph) !== 'area') { return false; }
-	        return entity.tags.building && entity.tags.building !== 'no';
-	    }
+	  var epsilon = 0.05;
+	  var nodeThreshold = 10;
 
+	  function isBuilding(entity, graph) {
+	    if (entity.type !== 'way' || entity.geometry(graph) !== 'area') return false;
+	    return entity.tags.building && entity.tags.building !== 'no';
+	  }
 
-	    var validation = function checkUnsquareWay(entity, graph) {
+	  var validation = function checkUnsquareWay(entity, graph) {
+	    if (!isBuilding(entity, graph)) return []; // don't flag ways marked as physically unsquare
 
-	        if (!isBuilding(entity, graph)) { return []; }
+	    if (entity.tags.nonsquare === 'yes') return [];
+	    var isClosed = entity.isClosed();
+	    if (!isClosed) return []; // this building has bigger problems
+	    // don't flag ways with lots of nodes since they are likely detail-mapped
 
-	        // don't flag ways marked as physically unsquare
-	        if (entity.tags.nonsquare === 'yes') { return []; }
+	    var nodes = graph.childNodes(entity).slice(); // shallow copy
 
-	        var isClosed = entity.isClosed();
-	        if (!isClosed) { return []; }        // this building has bigger problems
+	    if (nodes.length > nodeThreshold + 1) return []; // +1 because closing node appears twice
+	    // ignore if not all nodes are fully downloaded
 
-	        // don't flag ways with lots of nodes since they are likely detail-mapped
-	        var nodes = graph.childNodes(entity).slice();    // shallow copy
-	        if (nodes.length > nodeThreshold + 1) { return []; }   // +1 because closing node appears twice
+	    var osm = services.osm;
+	    if (!osm || nodes.some(function (node) {
+	      return !osm.isDataLoaded(node.loc);
+	    })) return []; // don't flag connected ways to avoid unresolvable unsquare loops
 
-	        // ignore if not all nodes are fully downloaded
-	        var osm = services.osm;
-	        if (!osm || nodes.some(function(node) { return !osm.isDataLoaded(node.loc); })) { return []; }
-
-	        // don't flag connected ways to avoid unresolvable unsquare loops
-	        var hasConnectedSquarableWays = nodes.some(function(node) {
-	            return graph.parentWays(node).some(function(way) {
-	                if (way.id === entity.id) { return false; }
-	                if (isBuilding(way, graph)) { return true; }
-	                return graph.parentRelations(way).some(function(parentRelation) {
-	                    return parentRelation.isMultipolygon() &&
-	                        parentRelation.tags.building &&
-	                        parentRelation.tags.building !== 'no';
-	                });
-	            });
+	    var hasConnectedSquarableWays = nodes.some(function (node) {
+	      return graph.parentWays(node).some(function (way) {
+	        if (way.id === entity.id) return false;
+	        if (isBuilding(way, graph)) return true;
+	        return graph.parentRelations(way).some(function (parentRelation) {
+	          return parentRelation.isMultipolygon() && parentRelation.tags.building && parentRelation.tags.building !== 'no';
 	        });
-	        if (hasConnectedSquarableWays) { return []; }
-
+	      });
+	    });
+	    if (hasConnectedSquarableWays) return []; // user-configurable square threshold
 
-	        // user-configurable square threshold
-	        var storedDegreeThreshold = corePreferences('validate-square-degrees');
-	        var degreeThreshold = isNaN(storedDegreeThreshold) ? DEFAULT_DEG_THRESHOLD : parseFloat(storedDegreeThreshold);
+	    var storedDegreeThreshold = corePreferences('validate-square-degrees');
+	    var degreeThreshold = isNaN(storedDegreeThreshold) ? DEFAULT_DEG_THRESHOLD : parseFloat(storedDegreeThreshold);
+	    var points = nodes.map(function (node) {
+	      return context.projection(node.loc);
+	    });
+	    if (!geoOrthoCanOrthogonalize(points, isClosed, epsilon, degreeThreshold, true)) return [];
+	    var autoArgs; // don't allow autosquaring features linked to wikidata
 
-	        var points = nodes.map(function(node) { return context.projection(node.loc); });
-	        if (!geoOrthoCanOrthogonalize(points, isClosed, epsilon, degreeThreshold, true)) { return []; }
+	    if (!entity.tags.wikidata) {
+	      // use same degree threshold as for detection
+	      var autoAction = actionOrthogonalize(entity.id, context.projection, undefined, degreeThreshold);
+	      autoAction.transitionable = false; // when autofixing, do it instantly
 
-	        var autoArgs;
-	        // don't allow autosquaring features linked to wikidata
-	        if (!entity.tags.wikidata) {
-	            // use same degree threshold as for detection
-	            var autoAction = actionOrthogonalize(entity.id, context.projection, undefined, degreeThreshold);
-	            autoAction.transitionable = false;  // when autofixing, do it instantly
-	            autoArgs = [autoAction, _t('operations.orthogonalize.annotation.feature.single')];
-	        }
+	      autoArgs = [autoAction, _t('operations.orthogonalize.annotation.feature', {
+	        n: 1
+	      })];
+	    }
 
-	        return [new validationIssue({
-	            type: type,
-	            subtype: 'building',
-	            severity: 'warning',
-	            message: function(context) {
-	                var entity = context.hasEntity(this.entityIds[0]);
-	                return entity ? _t('issues.unsquare_way.message', { feature: utilDisplayLabel(entity, context.graph()) }) : '';
-	            },
-	            reference: showReference,
-	            entityIds: [entity.id],
-	            hash: JSON.stringify(autoArgs !== undefined) + degreeThreshold,
-	            dynamicFixes: function() {
-	                return [
-	                    new validationIssueFix({
-	                        icon: 'iD-operation-orthogonalize',
-	                        title: _t('issues.fix.square_feature.title'),
-	                        autoArgs: autoArgs,
-	                        onClick: function(context, completionHandler) {
-	                            var entityId = this.issue.entityIds[0];
-	                            // use same degree threshold as for detection
-	                            context.perform(
-	                                actionOrthogonalize(entityId, context.projection, undefined, degreeThreshold),
-	                                _t('operations.orthogonalize.annotation.feature.single')
-	                            );
-	                            // run after the squaring transition (currently 150ms)
-	                            window.setTimeout(function() { completionHandler(); }, 175);
-	                        }
-	                    }) ];
+	    return [new validationIssue({
+	      type: type,
+	      subtype: 'building',
+	      severity: 'warning',
+	      message: function message(context) {
+	        var entity = context.hasEntity(this.entityIds[0]);
+	        return entity ? _t.html('issues.unsquare_way.message', {
+	          feature: utilDisplayLabel(entity, context.graph())
+	        }) : '';
+	      },
+	      reference: showReference,
+	      entityIds: [entity.id],
+	      hash: degreeThreshold,
+	      dynamicFixes: function dynamicFixes() {
+	        return [new validationIssueFix({
+	          icon: 'iD-operation-orthogonalize',
+	          title: _t.html('issues.fix.square_feature.title'),
+	          autoArgs: autoArgs,
+	          onClick: function onClick(context, completionHandler) {
+	            var entityId = this.issue.entityIds[0]; // use same degree threshold as for detection
+
+	            context.perform(actionOrthogonalize(entityId, context.projection, undefined, degreeThreshold), _t('operations.orthogonalize.annotation.feature', {
+	              n: 1
+	            })); // run after the squaring transition (currently 150ms)
+
+	            window.setTimeout(function () {
+	              completionHandler();
+	            }, 175);
+	          }
+	        })
+	        /*
+	        new validationIssueFix({
+	            title: t.html('issues.fix.tag_as_unsquare.title'),
+	            onClick: function(context) {
+	                var entityId = this.issue.entityIds[0];
+	                var entity = context.entity(entityId);
+	                var tags = Object.assign({}, entity.tags);  // shallow copy
+	                tags.nonsquare = 'yes';
+	                context.perform(
+	                    actionChangeTags(entityId, tags),
+	                    t('issues.fix.tag_as_unsquare.annotation')
+	                );
 	            }
-	        })];
-
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.unsquare_way.buildings.reference'));
-	        }
-	    };
+	        })
+	        */
+	        ];
+	      }
+	    })];
 
-	    validation.type = type;
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.unsquare_way.buildings.reference'));
+	    }
+	  };
 
-	    return validation;
+	  validation.type = type;
+	  return validation;
 	}
 
 	var Validations = /*#__PURE__*/Object.freeze({
@@ -61474,1758 +59210,2109 @@
 	});
 
 	function coreValidator(context) {
-	    var dispatch$1 = dispatch('validated', 'focusedIssue');
-	    var validator = utilRebind({}, dispatch$1, 'on');
+	  var _this = this;
 
-	    var _rules = {};
-	    var _disabledRules = {};
+	  var dispatch = dispatch$8('validated', 'focusedIssue');
+	  var validator = utilRebind({}, dispatch, 'on');
+	  var _rules = {};
+	  var _disabledRules = {};
 
-	    var _ignoredIssueIDs = {};          // issue.id -> true
-	    var _baseCache = validationCache(); // issues before any user edits
-	    var _headCache = validationCache(); // issues after all user edits
-	    var _validatedGraph = null;
-	    var _deferred = new Set();
+	  var _ignoredIssueIDs = new Set();
 
-	    //
-	    // initialize the validator rulesets
-	    //
-	    validator.init = function() {
-	        Object.values(Validations).forEach(function(validation) {
-	            if (typeof validation !== 'function') { return; }
+	  var _resolvedIssueIDs = new Set();
 
-	            var fn = validation(context);
-	            var key = fn.type;
-	            _rules[key] = fn;
-	        });
+	  var _baseCache = validationCache('base'); // issues before any user edits
 
-	        var disabledRules = corePreferences('validate-disabledRules');
-	        if (disabledRules) {
-	            disabledRules.split(',')
-	                .forEach(function(key) { _disabledRules[key] = true; });
-	        }
-	    };
 
+	  var _headCache = validationCache('head'); // issues after all user edits
 
-	    //
-	    // clear caches, called whenever iD resets after a save
-	    //
-	    validator.reset = function() {
-	        Array.from(_deferred).forEach(function(handle) {
-	            window.cancelIdleCallback(handle);
-	            _deferred.delete(handle);
-	        });
 
-	        // clear caches
-	        _ignoredIssueIDs = {};
-	        _baseCache = validationCache();
-	        _headCache = validationCache();
-	        _validatedGraph = null;
-	    };
+	  var _completeDiff = {}; // complete diff base -> head of what the user changed
 
-	    validator.resetIgnoredIssues = function() {
-	        _ignoredIssueIDs = {};
-	        // reload UI
-	        dispatch$1.call('validated');
-	    };
+	  var _headIsCurrent = false;
 
+	  var _deferredRIC = new Set(); // Set( RequestIdleCallback handles )
 
-	    // must update issues when the user changes the unsquare thereshold
-	    validator.reloadUnsquareIssues = function() {
 
-	        reloadUnsquareIssues(_headCache, context.graph());
-	        reloadUnsquareIssues(_baseCache, context.history().base());
+	  var _deferredST = new Set(); // Set( SetTimeout handles )
 
-	        dispatch$1.call('validated');
-	    };
 
-	    function reloadUnsquareIssues(cache, graph) {
+	  var _headPromise; // Promise fulfilled when validation is performed up to headGraph snapshot
 
-	        var checkUnsquareWay = _rules.unsquare_way;
-	        if (typeof checkUnsquareWay !== 'function') { return; }
 
-	        // uncache existing
-	        cache.uncacheIssuesOfType('unsquare_way');
+	  var RETRY = 5000; // wait 5sec before revalidating provisional entities
+	  // Allow validation severity to be overridden by url queryparams...
+	  // See: https://github.com/openstreetmap/iD/pull/8243
+	  //
+	  // Each param should contain a urlencoded comma separated list of
+	  // `type/subtype` rules.  `*` may be used as a wildcard..
+	  // Examples:
+	  //  `validationError=disconnected_way/*`
+	  //  `validationError=disconnected_way/highway`
+	  //  `validationError=crossing_ways/bridge*`
+	  //  `validationError=crossing_ways/bridge*,crossing_ways/tunnel*`
+
+	  var _errorOverrides = parseHashParam(context.initialHashParams.validationError);
+
+	  var _warningOverrides = parseHashParam(context.initialHashParams.validationWarning);
+
+	  var _disableOverrides = parseHashParam(context.initialHashParams.validationDisable); // `parseHashParam()`   (private)
+	  // Checks hash parameters for severity overrides
+	  // Arguments
+	  //   `param` - a url hash parameter (`validationError`, `validationWarning`, or `validationDisable`)
+	  // Returns
+	  //   Array of Objects like { type: RegExp, subtype: RegExp }
+	  //
 
-	        var buildings = context.history().tree().intersects(geoExtent([-180,-90],[180, 90]), graph)  // everywhere
-	            .filter(function(entity) {
-	                return entity.type === 'way' && entity.tags.building && entity.tags.building !== 'no';
-	            });
 
-	        // rerun for all buildings
-	        buildings.forEach(function(entity) {
-	            var detected = checkUnsquareWay(entity, graph);
-	            if (detected.length !== 1) { return; }
-	            var issue = detected[0];
-	            if (!cache.issuesByEntityID[entity.id]) {
-	                cache.issuesByEntityID[entity.id] = new Set();
-	            }
-	            cache.issuesByEntityID[entity.id].add(issue.id);
-	            cache.issuesByIssueID[issue.id] = issue;
-	        });
+	  function parseHashParam(param) {
+	    var result = [];
+	    var rules = (param || '').split(',');
+	    rules.forEach(function (rule) {
+	      rule = rule.trim();
+	      var parts = rule.split('/', 2); // "type/subtype"
+
+	      var type = parts[0];
+	      var subtype = parts[1] || '*';
+	      if (!type || !subtype) return;
+	      result.push({
+	        type: makeRegExp(type),
+	        subtype: makeRegExp(subtype)
+	      });
+	    });
+	    return result;
+
+	    function makeRegExp(str) {
+	      var escaped = str.replace(/[-\/\\^$+?.()|[\]{}]/g, '\\$&') // escape all reserved chars except for the '*'
+	      .replace(/\*/g, '.*'); // treat a '*' like '.*'
+
+	      return new RegExp('^' + escaped + '$');
 	    }
+	  } // `init()`
+	  // Initialize the validator, called once on iD startup
+	  //
 
-	    // options = {
-	    //     what: 'all',     // 'all' or 'edited'
-	    //     where: 'all',   // 'all' or 'visible'
-	    //     includeIgnored: false   // true, false, or 'only'
-	    //     includeDisabledRules: false   // true, false, or 'only'
-	    // };
-	    validator.getIssues = function(options) {
-	        var opts = Object.assign({ what: 'all', where: 'all', includeIgnored: false, includeDisabledRules: false }, options);
-	        var issues = Object.values(_headCache.issuesByIssueID);
-	        var view = context.map().extent();
-
-	        return issues.filter(function(issue) {
-	            if (!issue) { return false; }
-	            if (opts.includeDisabledRules === 'only' && !_disabledRules[issue.type]) { return false; }
-	            if (!opts.includeDisabledRules && _disabledRules[issue.type]) { return false; }
-
-	            if (opts.includeIgnored === 'only' && !_ignoredIssueIDs[issue.id]) { return false; }
-	            if (!opts.includeIgnored && _ignoredIssueIDs[issue.id]) { return false; }
-
-	            // Sanity check:  This issue may be for an entity that not longer exists.
-	            // If we detect this, uncache and return false so it is not included..
-	            var entityIds = issue.entityIds || [];
-	            for (var i = 0; i < entityIds.length; i++) {
-	                var entityId = entityIds[i];
-	                if (!context.hasEntity(entityId)) {
-	                    delete _headCache.issuesByEntityID[entityId];
-	                    delete _headCache.issuesByIssueID[issue.id];
-	                    return false;
-	                }
-	            }
 
-	            if (opts.what === 'edited' && _baseCache.issuesByIssueID[issue.id]) { return false; }
+	  validator.init = function () {
+	    Object.values(Validations).forEach(function (validation) {
+	      if (typeof validation !== 'function') return;
+	      var fn = validation(context);
+	      var key = fn.type;
+	      _rules[key] = fn;
+	    });
+	    var disabledRules = corePreferences('validate-disabledRules');
 
-	            if (opts.where === 'visible') {
-	                var extent = issue.extent(context.graph());
-	                if (!view.intersects(extent)) { return false; }
-	            }
+	    if (disabledRules) {
+	      disabledRules.split(',').forEach(function (k) {
+	        return _disabledRules[k] = true;
+	      });
+	    }
+	  }; // `reset()`   (private)
+	  // Cancels deferred work and resets all caches
+	  //
+	  // Arguments
+	  //   `resetIgnored` - `true` to clear the list of user-ignored issues
+	  //
 
-	            return true;
-	        });
-	    };
 
-	    validator.getResolvedIssues = function() {
-	        var baseIssues = Object.values(_baseCache.issuesByIssueID);
-	        return baseIssues.filter(function(issue) {
-	            return !_headCache.issuesByIssueID[issue.id];
+	  function reset(resetIgnored) {
+	    // cancel deferred work
+	    _deferredRIC.forEach(window.cancelIdleCallback);
+
+	    _deferredRIC.clear();
+
+	    _deferredST.forEach(window.clearTimeout);
+
+	    _deferredST.clear(); // empty queues and resolve any pending promise
+
+
+	    _baseCache.queue = [];
+	    _headCache.queue = [];
+	    processQueue(_headCache);
+	    processQueue(_baseCache); // clear caches
+
+	    if (resetIgnored) _ignoredIssueIDs.clear();
+
+	    _resolvedIssueIDs.clear();
+
+	    _baseCache = validationCache('base');
+	    _headCache = validationCache('head');
+	    _completeDiff = {};
+	    _headIsCurrent = false;
+	  } // `reset()`
+	  // clear caches, called whenever iD resets after a save or switches sources
+	  // (clears out the _ignoredIssueIDs set also)
+	  //
+
+
+	  validator.reset = function () {
+	    reset(true);
+	  }; // `resetIgnoredIssues()`
+	  // clears out the _ignoredIssueIDs Set
+	  //
+
+
+	  validator.resetIgnoredIssues = function () {
+	    _ignoredIssueIDs.clear();
+
+	    dispatch.call('validated'); // redraw UI
+	  }; // `revalidateUnsquare()`
+	  // Called whenever the user changes the unsquare threshold
+	  // It reruns just the "unsquare_way" validation on all buildings.
+	  //
+
+
+	  validator.revalidateUnsquare = function () {
+	    revalidateUnsquare(_headCache);
+	    revalidateUnsquare(_baseCache);
+	    dispatch.call('validated');
+	  };
+
+	  function revalidateUnsquare(cache) {
+	    var checkUnsquareWay = _rules.unsquare_way;
+	    if (!cache.graph || typeof checkUnsquareWay !== 'function') return; // uncache existing
+
+	    cache.uncacheIssuesOfType('unsquare_way');
+	    var buildings = context.history().tree().intersects(geoExtent([-180, -90], [180, 90]), cache.graph) // everywhere
+	    .filter(function (entity) {
+	      return entity.type === 'way' && entity.tags.building && entity.tags.building !== 'no';
+	    }); // rerun for all buildings
+
+	    buildings.forEach(function (entity) {
+	      var detected = checkUnsquareWay(entity, cache.graph);
+	      if (!detected.length) return;
+	      cache.cacheIssues(detected);
+	    });
+	  } // `getIssues()`
+	  // Gets all issues that match the given options
+	  // This is called by many other places
+	  //
+	  // Arguments
+	  //   `options` Object like:
+	  //   {
+	  //     what: 'all',                  // 'all' or 'edited'
+	  //     where: 'all',                 // 'all' or 'visible'
+	  //     includeIgnored: false,        // true, false, or 'only'
+	  //     includeDisabledRules: false   // true, false, or 'only'
+	  //   }
+	  //
+	  // Returns
+	  //   An Array containing the issues
+	  //
+
+
+	  validator.getIssues = function (options) {
+	    var opts = Object.assign({
+	      what: 'all',
+	      where: 'all',
+	      includeIgnored: false,
+	      includeDisabledRules: false
+	    }, options);
+	    var view = context.map().extent();
+	    var seen = new Set();
+	    var results = []; // collect head issues - present in the user edits
+
+	    if (_headCache.graph && _headCache.graph !== _baseCache.graph) {
+	      Object.values(_headCache.issuesByIssueID).forEach(function (issue) {
+	        // In the head cache, only count features that the user is responsible for - #8632
+	        // For example, a user can undo some work and an issue will still present in the
+	        // head graph, but we don't want to credit the user for causing that issue.
+	        var userModified = (issue.entityIds || []).some(function (id) {
+	          return _completeDiff.hasOwnProperty(id);
 	        });
-	    };
+	        if (opts.what === 'edited' && !userModified) return; // present in head but user didn't touch it
 
-	    validator.focusIssue = function(issue) {
-	        var extent = issue.extent(context.graph());
+	        if (!filter(issue)) return;
+	        seen.add(issue.id);
+	        results.push(issue);
+	      });
+	    } // collect base issues - present before user edits
 
-	        if (extent) {
-	            var setZoom = Math.max(context.map().zoom(), 19);
-	            context.map().unobscuredCenterZoomEase(extent.center(), setZoom);
-
-	            // select the first entity
-	            if (issue.entityIds && issue.entityIds.length) {
-	                window.setTimeout(function() {
-	                    var ids = issue.entityIds;
-	                    context.enter(modeSelect(context, [ids[0]]));
-	                    dispatch$1.call('focusedIssue', this, issue);
-	                }, 250);  // after ease
-	            }
-	        }
-	    };
 
+	    if (opts.what === 'all') {
+	      Object.values(_baseCache.issuesByIssueID).forEach(function (issue) {
+	        if (!filter(issue)) return;
+	        seen.add(issue.id);
+	        results.push(issue);
+	      });
+	    }
+
+	    return results; // Filter the issue set to include only what the calling code wants to see.
+	    // Note that we use `context.graph()`/`context.hasEntity()` here, not `cache.graph`,
+	    // because that is the graph that the calling code will be using.
 
-	    validator.getIssuesBySeverity = function(options) {
-	        var groups = utilArrayGroupBy(validator.getIssues(options), 'severity');
-	        groups.error = groups.error || [];
-	        groups.warning = groups.warning || [];
-	        return groups;
-	    };
+	    function filter(issue) {
+	      if (!issue) return false;
+	      if (seen.has(issue.id)) return false;
+	      if (_resolvedIssueIDs.has(issue.id)) return false;
+	      if (opts.includeDisabledRules === 'only' && !_disabledRules[issue.type]) return false;
+	      if (!opts.includeDisabledRules && _disabledRules[issue.type]) return false;
+	      if (opts.includeIgnored === 'only' && !_ignoredIssueIDs.has(issue.id)) return false;
+	      if (!opts.includeIgnored && _ignoredIssueIDs.has(issue.id)) return false; // This issue may involve an entity that doesn't exist in context.graph()
+	      // This can happen because validation is async and rendering the issue lists is async.
 
-	    // show some issue types in a particular order
-	    var orderedIssueTypes = [
-	        // flag missing data first
-	        'missing_tag', 'missing_role',
-	        // then flag identity issues
-	        'outdated_tags', 'mismatched_geometry',
-	        // flag geometry issues where fixing them might solve connectivity issues
-	        'crossing_ways', 'almost_junction',
-	        // then flag connectivity issues
-	        'disconnected_way', 'impossible_oneway'
-	    ];
+	      if ((issue.entityIds || []).some(function (id) {
+	        return !context.hasEntity(id);
+	      })) return false;
 
-	    // returns the issues that the given entity IDs have in common, matching the given options
-	    validator.getSharedEntityIssues = function(entityIDs, options) {
-	        var cache = _headCache;
+	      if (opts.where === 'visible') {
+	        var extent = issue.extent(context.graph());
+	        if (!view.intersects(extent)) return false;
+	      }
 
-	        // gather the issues that are common to all the entities
-	        var issueIDs = entityIDs.reduce(function(acc, entityID) {
-	            var entityIssueIDs = cache.issuesByEntityID[entityID] || new Set();
-	            if (!acc) {
-	                return new Set(entityIssueIDs);
-	            }
-	            return new Set([].concat( acc ).filter(function(elem) {
-	                return entityIssueIDs.has(elem);
-	            }));
-	        }, null) || [];
+	      return true;
+	    }
+	  }; // `getResolvedIssues()`
+	  // Gets the issues that have been fixed by the user.
+	  //
+	  // Resolved issues are tracked in the `_resolvedIssueIDs` Set,
+	  // and they should all be issues that exist in the _baseCache.
+	  //
+	  // Returns
+	  //   An Array containing the issues
+	  //
 
-	        var opts = options || {};
 
-	        return Array.from(issueIDs)
-	            .map(function(id) { return cache.issuesByIssueID[id]; })
-	            .filter(function(issue) {
-	                if (!issue) { return false; }
-	                if (opts.includeDisabledRules === 'only' && !_disabledRules[issue.type]) { return false; }
-	                if (!opts.includeDisabledRules && _disabledRules[issue.type]) { return false; }
+	  validator.getResolvedIssues = function () {
+	    return Array.from(_resolvedIssueIDs).map(function (issueID) {
+	      return _baseCache.issuesByIssueID[issueID];
+	    }).filter(Boolean);
+	  }; // `focusIssue()`
+	  // Adjusts the map to focus on the given issue.
+	  // (requires the issue to have a reasonable extent defined)
+	  //
+	  // Arguments
+	  //   `issue` - the issue to focus on
+	  //
 
-	                if (opts.includeIgnored === 'only' && !_ignoredIssueIDs[issue.id]) { return false; }
-	                if (!opts.includeIgnored && _ignoredIssueIDs[issue.id]) { return false; }
 
-	                return true;
-	            }).sort(function(issue1, issue2) {
-	                if (issue1.type === issue2.type) {
-	                    // issues of the same type, sort deterministically
-	                    return issue1.id < issue2.id ? -1 : 1;
-	                }
-	                var index1 = orderedIssueTypes.indexOf(issue1.type);
-	                var index2 = orderedIssueTypes.indexOf(issue2.type);
-	                if (index1 !== -1 && index2 !== -1) {
-	                    // both issue types have explicit sort orders
-	                    return index1 - index2;
-	                } else if (index1 === -1 && index2 === -1) {
-	                    // neither issue type has an explicit sort order, sort by type
-	                    return issue1.type < issue2.type ? -1 : 1;
-	                } else {
-	                    // order explicit types before everything else
-	                    return index1 !== -1 ? -1 : 1;
-	                }
-	            });
-	    };
+	  validator.focusIssue = function (issue) {
+	    // Note that we use `context.graph()`/`context.hasEntity()` here, not `cache.graph`,
+	    // because that is the graph that the calling code will be using.
+	    var graph = context.graph();
+	    var selectID;
+	    var focusCenter; // Try to focus the map at the center of the issue..
 
+	    var issueExtent = issue.extent(graph);
 
-	    validator.getEntityIssues = function(entityID, options) {
-	        return validator.getSharedEntityIssues([entityID], options);
-	    };
+	    if (issueExtent) {
+	      focusCenter = issueExtent.center();
+	    } // Try to select the first entity in the issue..
 
 
-	    validator.getRuleKeys = function() {
-	        return Object.keys(_rules);
-	    };
+	    if (issue.entityIds && issue.entityIds.length) {
+	      selectID = issue.entityIds[0]; // If a relation, focus on one of its members instead.
+	      // Otherwise we might be focusing on a part of map where the relation is not visible.
 
+	      if (selectID && selectID.charAt(0) === 'r') {
+	        // relation
+	        var ids = utilEntityAndDeepMemberIDs([selectID], graph);
+	        var nodeID = ids.find(function (id) {
+	          return id.charAt(0) === 'n' && graph.hasEntity(id);
+	        });
 
-	    validator.isRuleEnabled = function(key) {
-	        return !_disabledRules[key];
-	    };
+	        if (!nodeID) {
+	          // relation has no downloaded nodes to focus on
+	          var wayID = ids.find(function (id) {
+	            return id.charAt(0) === 'w' && graph.hasEntity(id);
+	          });
 
+	          if (wayID) {
+	            nodeID = graph.entity(wayID).first(); // focus on the first node of this way
+	          }
+	        }
 
-	    validator.toggleRule = function(key) {
-	        if (_disabledRules[key]) {
-	            delete _disabledRules[key];
-	        } else {
-	            _disabledRules[key] = true;
+	        if (nodeID) {
+	          focusCenter = graph.entity(nodeID).loc;
 	        }
+	      }
+	    }
+
+	    if (focusCenter) {
+	      // Adjust the view
+	      var setZoom = Math.max(context.map().zoom(), 19);
+	      context.map().unobscuredCenterZoomEase(focusCenter, setZoom);
+	    }
+
+	    if (selectID) {
+	      // Enter select mode
+	      window.setTimeout(function () {
+	        context.enter(modeSelect(context, [selectID]));
+	        dispatch.call('focusedIssue', _this, issue);
+	      }, 250); // after ease
+	    }
+	  }; // `getIssuesBySeverity()`
+	  // Gets the issues then groups them by error/warning
+	  // (This just calls getIssues, then puts issues in groups)
+	  //
+	  // Arguments
+	  //   `options` - (see `getIssues`)
+	  // Returns
+	  //   Object result like:
+	  //   {
+	  //     error:    Array of errors,
+	  //     warning:  Array of warnings
+	  //   }
+	  //
+
 
-	        corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
-	        validator.validate();
-	    };
+	  validator.getIssuesBySeverity = function (options) {
+	    var groups = utilArrayGroupBy(validator.getIssues(options), 'severity');
+	    groups.error = groups.error || [];
+	    groups.warning = groups.warning || [];
+	    return groups;
+	  }; // `getEntityIssues()`
+	  // Gets the issues that the given entity IDs have in common, matching the given options
+	  // (This just calls getIssues, then filters for the given entity IDs)
+	  // The issues are sorted for relevance
+	  //
+	  // Arguments
+	  //   `entityIDs` - Array or Set of entityIDs to get issues for
+	  //   `options` - (see `getIssues`)
+	  // Returns
+	  //   An Array containing the issues
+	  //
 
 
-	    validator.disableRules = function(keys) {
-	        _disabledRules = {};
-	        keys.forEach(function(k) {
-	            _disabledRules[k] = true;
-	        });
+	  validator.getSharedEntityIssues = function (entityIDs, options) {
+	    var orderedIssueTypes = [// Show some issue types in a particular order:
+	    'missing_tag', 'missing_role', // - missing data first
+	    'outdated_tags', 'mismatched_geometry', // - identity issues
+	    'crossing_ways', 'almost_junction', // - geometry issues where fixing them might solve connectivity issues
+	    'disconnected_way', 'impossible_oneway' // - finally connectivity issues
+	    ];
+	    var allIssues = validator.getIssues(options);
+	    var forEntityIDs = new Set(entityIDs);
+	    return allIssues.filter(function (issue) {
+	      return (issue.entityIds || []).some(function (entityID) {
+	        return forEntityIDs.has(entityID);
+	      });
+	    }).sort(function (issue1, issue2) {
+	      if (issue1.type === issue2.type) {
+	        // issues of the same type, sort deterministically
+	        return issue1.id < issue2.id ? -1 : 1;
+	      }
 
-	        corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
-	        validator.validate();
-	    };
+	      var index1 = orderedIssueTypes.indexOf(issue1.type);
+	      var index2 = orderedIssueTypes.indexOf(issue2.type);
 
+	      if (index1 !== -1 && index2 !== -1) {
+	        // both issue types have explicit sort orders
+	        return index1 - index2;
+	      } else if (index1 === -1 && index2 === -1) {
+	        // neither issue type has an explicit sort order, sort by type
+	        return issue1.type < issue2.type ? -1 : 1;
+	      } else {
+	        // order explicit types before everything else
+	        return index1 !== -1 ? -1 : 1;
+	      }
+	    });
+	  }; // `getEntityIssues()`
+	  // Get an array of detected issues for the given entityID.
+	  // (This just calls getSharedEntityIssues for a single entity)
+	  //
+	  // Arguments
+	  //   `entityID` - the entity ID to get the issues for
+	  //   `options` - (see `getIssues`)
+	  // Returns
+	  //   An Array containing the issues
+	  //
 
-	    validator.ignoreIssue = function(id) {
-	        _ignoredIssueIDs[id] = true;
-	    };
 
+	  validator.getEntityIssues = function (entityID, options) {
+	    return validator.getSharedEntityIssues([entityID], options);
+	  }; // `getRuleKeys()`
+	  //
+	  // Returns
+	  //   An Array containing the rule keys
+	  //
 
-	    //
-	    // Run validation on a single entity for the given graph
-	    //
-	    function validateEntity(entity, graph) {
-	        var entityIssues = [];
 
-	        // runs validation and appends resulting issues
-	        function runValidation(key) {
+	  validator.getRuleKeys = function () {
+	    return Object.keys(_rules);
+	  }; // `isRuleEnabled()`
+	  //
+	  // Arguments
+	  //   `key` - the rule to check (e.g. 'crossing_ways')
+	  // Returns
+	  //   `true`/`false`
+	  //
 
-	            var fn = _rules[key];
-	            if (typeof fn !== 'function') {
-	                console.error('no such validation rule = ' + key);  // eslint-disable-line no-console
-	                return;
-	            }
 
-	            var detected = fn(entity, graph);
-	            entityIssues = entityIssues.concat(detected);
-	        }
+	  validator.isRuleEnabled = function (key) {
+	    return !_disabledRules[key];
+	  }; // `toggleRule()`
+	  // Toggles a single validation rule,
+	  // then reruns the validation so that the user sees something happen in the UI
+	  //
+	  // Arguments
+	  //   `key` - the rule to toggle (e.g. 'crossing_ways')
+	  //
 
-	        // run all rules
-	        Object.keys(_rules).forEach(runValidation);
 
-	        return entityIssues;
+	  validator.toggleRule = function (key) {
+	    if (_disabledRules[key]) {
+	      delete _disabledRules[key];
+	    } else {
+	      _disabledRules[key] = true;
 	    }
 
-	    function entityIDsToValidate(entityIDs, graph) {
-	        var processedIDs = new Set();
-	        return entityIDs.reduce(function(acc, entityID) {
-	            // keep redundancy check separate from `acc` because an `entityID`
-	            // could have been added to `acc` as a related entity through an earlier pass
-	            if (processedIDs.has(entityID)) { return acc; }
-	            processedIDs.add(entityID);
+	    corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
+	    validator.validate();
+	  }; // `disableRules()`
+	  // Disables given validation rules,
+	  // then reruns the validation so that the user sees something happen in the UI
+	  //
+	  // Arguments
+	  //   `keys` - Array or Set containing rule keys to disable
+	  //
 
-	            var entity = graph.hasEntity(entityID);
-	            if (!entity) { return acc; }
 
-	            acc.add(entityID);
+	  validator.disableRules = function (keys) {
+	    _disabledRules = {};
+	    keys.forEach(function (k) {
+	      return _disabledRules[k] = true;
+	    });
+	    corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
+	    validator.validate();
+	  }; // `ignoreIssue()`
+	  // Don't show the given issue in lists
+	  //
+	  // Arguments
+	  //   `issueID` - the issueID
+	  //
 
-	            var checkParentRels = [entity];
 
-	            if (entity.type === 'node') {
-	                graph.parentWays(entity).forEach(function(parentWay) {
-	                    acc.add(parentWay.id); // include parent ways
-	                    checkParentRels.push(parentWay);
-	                });
-	            } else if (entity.type === 'relation') {
-	                entity.members.forEach(function(member) {
-	                    acc.add(member.id); // include members
-	                });
-	            } else if (entity.type === 'way') {
-	                entity.nodes.forEach(function(nodeID) {
-	                    acc.add(nodeID); // include child nodes
-	                    graph._parentWays[nodeID].forEach(function(wayID) {
-	                        acc.add(wayID); // include connected ways
-	                    });
-	                });
-	            }
+	  validator.ignoreIssue = function (issueID) {
+	    _ignoredIssueIDs.add(issueID);
+	  }; // `validate()`
+	  // Validates anything that has changed in the head graph since the last time it was run.
+	  // (head graph contains user's edits)
+	  //
+	  // Returns
+	  //   A Promise fulfilled when the validation has completed and then dispatches a `validated` event.
+	  //   This may take time but happen in the background during browser idle time.
+	  //
 
-	            checkParentRels.forEach(function(entity) {   // include parent relations
-	                if (entity.type !== 'relation') {        // but not super-relations
-	                    graph.parentRelations(entity).forEach(function(parentRelation) {
-	                        acc.add(parentRelation.id);
-	                    });
-	                }
-	            });
 
-	            return acc;
+	  validator.validate = function () {
+	    // Make sure the caches have graphs assigned to them.
+	    // (we don't do this in `reset` because context is still resetting things and `history.base()` is unstable then)
+	    var baseGraph = context.history().base();
+	    if (!_headCache.graph) _headCache.graph = baseGraph;
+	    if (!_baseCache.graph) _baseCache.graph = baseGraph;
+	    var prevGraph = _headCache.graph;
+	    var currGraph = context.graph();
 
-	        }, new Set());
+	    if (currGraph === prevGraph) {
+	      // _headCache.graph is current - we are caught up
+	      _headIsCurrent = true;
+	      dispatch.call('validated');
+	      return Promise.resolve();
 	    }
 
-	    //
-	    // Run validation for several entities, supplied `entityIDs`,
-	    // against `graph` for the given `cache`
-	    //
-	    function validateEntities(entityIDs, graph, cache) {
+	    if (_headPromise) {
+	      // Validation already in process, but we aren't caught up to current
+	      _headIsCurrent = false; // We will need to catch up after the validation promise fulfills
 
-	        // clear caches for existing issues related to these entities
-	        entityIDs.forEach(cache.uncacheEntityID);
+	      return _headPromise;
+	    } // If we get here, its time to start validating stuff.
 
-	        // detect new issues and update caches
-	        entityIDs.forEach(function(entityID) {
-	            var entity = graph.hasEntity(entityID);
-	            // don't validate deleted entities
-	            if (!entity) { return; }
 
-	            var issues = validateEntity(entity, graph);
-	            cache.cacheIssues(issues);
-	        });
+	    _headCache.graph = currGraph; // take snapshot
+
+	    _completeDiff = context.history().difference().complete();
+	    var incrementalDiff = coreDifference(prevGraph, currGraph);
+	    var entityIDs = Object.keys(incrementalDiff.complete());
+	    entityIDs = _headCache.withAllRelatedEntities(entityIDs); // expand set
+
+	    if (!entityIDs.size) {
+	      dispatch.call('validated');
+	      return Promise.resolve();
 	    }
 
+	    _headPromise = validateEntitiesAsync(entityIDs, _headCache).then(function () {
+	      return updateResolvedIssues(entityIDs);
+	    }).then(function () {
+	      return dispatch.call('validated');
+	    })["catch"](function () {
+	      /* ignore */
+	    }).then(function () {
+	      _headPromise = null;
 
-	    //
-	    // Validates anything that has changed since the last time it was run.
-	    // Also updates the "validatedGraph" to be the current graph
-	    // and dispatches a `validated` event when finished.
-	    //
-	    validator.validate = function() {
+	      if (!_headIsCurrent) {
+	        validator.validate(); // run it again to catch up to current graph
+	      }
+	    });
+	    return _headPromise;
+	  }; // register event handlers:
+	  // WHEN TO RUN VALIDATION:
+	  // When history changes:
+
+
+	  context.history().on('restore.validator', validator.validate) // on restore saved history
+	  .on('undone.validator', validator.validate) // on undo
+	  .on('redone.validator', validator.validate) // on redo
+	  .on('reset.validator', function () {
+	    // on history reset - happens after save, or enter/exit walkthrough
+	    reset(false); // cached issues aren't valid any longer if the history has been reset
+
+	    validator.validate();
+	  }); // but not on 'change' (e.g. while drawing)
+	  // When user changes editing modes (to catch recent changes e.g. drawing)
+
+	  context.on('exit.validator', validator.validate); // When merging fetched data, validate base graph:
+
+	  context.history().on('merge.validator', function (entities) {
+	    if (!entities) return; // Make sure the caches have graphs assigned to them.
+	    // (we don't do this in `reset` because context is still resetting things and `history.base()` is unstable then)
+
+	    var baseGraph = context.history().base();
+	    if (!_headCache.graph) _headCache.graph = baseGraph;
+	    if (!_baseCache.graph) _baseCache.graph = baseGraph;
+	    var entityIDs = entities.map(function (entity) {
+	      return entity.id;
+	    });
+	    entityIDs = _baseCache.withAllRelatedEntities(entityIDs); // expand set
+
+	    validateEntitiesAsync(entityIDs, _baseCache);
+	  }); // `validateEntity()`   (private)
+	  // Runs all validation rules on a single entity.
+	  // Some things to note:
+	  //  - Graph is passed in from whenever the validation was started.  Validators shouldn't use
+	  //   `context.graph()` because this all happens async, and the graph might have changed
+	  //   (for example, nodes getting deleted before the validation can run)
+	  //  - Validator functions may still be waiting on something and return a "provisional" result.
+	  //    In this situation, we will schedule to revalidate the entity sometime later.
+	  //
+	  // Arguments
+	  //   `entity` - The entity
+	  //   `graph` - graph containing the entity
+	  //
+	  // Returns
+	  //   Object result like:
+	  //   {
+	  //     issues:       Array of detected issues
+	  //     provisional:  `true` if provisional result, `false` if final result
+	  //   }
+	  //
 
-	        var currGraph = context.graph();
-	        _validatedGraph = _validatedGraph || context.history().base();
-	        if (currGraph === _validatedGraph) {
-	            dispatch$1.call('validated');
-	            return;
-	        }
-	        var oldGraph = _validatedGraph;
-	        var difference = coreDifference(oldGraph, currGraph);
-	        _validatedGraph = currGraph;
+	  function validateEntity(entity, graph) {
+	    var result = {
+	      issues: [],
+	      provisional: false
+	    };
+	    Object.keys(_rules).forEach(runValidation); // run all rules
 
-	        var createdAndModifiedEntityIDs = difference.extantIDs(true);   // created/modified (true = w/relation members)
-	        var entityIDsToCheck = entityIDsToValidate(createdAndModifiedEntityIDs, currGraph);
+	    return result; // runs validation and appends resulting issues
 
-	        // check modified and deleted entities against the old graph in order to update their related entities
-	        // (e.g. deleting the only highway connected to a road should create a disconnected highway issue)
-	        var modifiedAndDeletedEntityIDs = difference.deleted().concat(difference.modified())
-	            .map(function(entity) { return entity.id; });
-	        var entityIDsToCheckForOldGraph = entityIDsToValidate(modifiedAndDeletedEntityIDs, oldGraph);
+	    function runValidation(key) {
+	      var fn = _rules[key];
 
-	        // concat the sets
-	        entityIDsToCheckForOldGraph.forEach(entityIDsToCheck.add, entityIDsToCheck);
+	      if (typeof fn !== 'function') {
+	        console.error('no such validation rule = ' + key); // eslint-disable-line no-console
 
-	        validateEntities(entityIDsToCheck, context.graph(), _headCache);
+	        return;
+	      }
 
-	        dispatch$1.call('validated');
-	    };
+	      var detected = fn(entity, graph);
 
+	      if (detected.provisional) {
+	        // this validation should be run again later
+	        result.provisional = true;
+	      }
 
-	    // WHEN TO RUN VALIDATION:
-	    // When graph changes:
-	    context.history()
-	        .on('restore.validator', validator.validate)   // restore saved history
-	        .on('undone.validator', validator.validate)    // undo
-	        .on('redone.validator', validator.validate);   // redo
-	        // but not on 'change' (e.g. while drawing)
+	      detected = detected.filter(applySeverityOverrides);
+	      result.issues = result.issues.concat(detected); // If there are any override rules that match the issue type/subtype,
+	      // adjust severity (or disable it) and keep/discard as quickly as possible.
 
-	    // When user changes editing modes:
-	    context
-	        .on('exit.validator', validator.validate);
+	      function applySeverityOverrides(issue) {
+	        var type = issue.type;
+	        var subtype = issue.subtype || '';
+	        var i;
 
-	    // When merging fetched data:
-	    context.history()
-	        .on('merge.validator', function(entities) {
-	            if (!entities) { return; }
-	            var handle = window.requestIdleCallback(function() {
-	                var entityIDs = entities.map(function(entity) { return entity.id; });
-	                var headGraph = context.graph();
-	                validateEntities(entityIDsToValidate(entityIDs, headGraph), headGraph, _headCache);
+	        for (i = 0; i < _errorOverrides.length; i++) {
+	          if (_errorOverrides[i].type.test(type) && _errorOverrides[i].subtype.test(subtype)) {
+	            issue.severity = 'error';
+	            return true;
+	          }
+	        }
 
-	                var baseGraph = context.history().base();
-	                validateEntities(entityIDsToValidate(entityIDs, baseGraph), baseGraph, _baseCache);
+	        for (i = 0; i < _warningOverrides.length; i++) {
+	          if (_warningOverrides[i].type.test(type) && _warningOverrides[i].subtype.test(subtype)) {
+	            issue.severity = 'warning';
+	            return true;
+	          }
+	        }
 
-	                dispatch$1.call('validated');
-	            });
-	            _deferred.add(handle);
-	        });
+	        for (i = 0; i < _disableOverrides.length; i++) {
+	          if (_disableOverrides[i].type.test(type) && _disableOverrides[i].subtype.test(subtype)) {
+	            return false;
+	          }
+	        }
 
+	        return true;
+	      }
+	    }
+	  } // `updateResolvedIssues()`   (private)
+	  // Determine if any issues were resolved for the given entities.
+	  // This is called by `validate()` after validation of the head graph
+	  //
+	  // Give the user credit for fixing an issue if:
+	  // - the issue is in the base cache
+	  // - the issue is not in the head cache
+	  // - the user did something to one of the entities involved in the issue
+	  //
+	  // Arguments
+	  //   `entityIDs` - Array or Set containing entity IDs.
+	  //
 
-	    return validator;
-	}
 
+	  function updateResolvedIssues(entityIDs) {
+	    entityIDs.forEach(function (entityID) {
+	      var baseIssues = _baseCache.issuesByEntityID[entityID];
+	      if (!baseIssues) return;
+	      baseIssues.forEach(function (issueID) {
+	        // Check if the user did something to one of the entities involved in this issue.
+	        // (This issue could involve multiple entities, e.g. disconnected routable features)
+	        var issue = _baseCache.issuesByIssueID[issueID];
+	        var userModified = (issue.entityIds || []).some(function (id) {
+	          return _completeDiff.hasOwnProperty(id);
+	        });
 
-	function validationCache() {
+	        if (userModified && !_headCache.issuesByIssueID[issueID]) {
+	          // issue seems fixed
+	          _resolvedIssueIDs.add(issueID);
+	        } else {
+	          // issue still not resolved
+	          _resolvedIssueIDs["delete"](issueID); // (did undo, or possibly fixed and then re-caused the issue)
 
-	    var cache = {
-	        issuesByIssueID: {},  // issue.id -> issue
-	        issuesByEntityID: {} // entity.id -> set(issue.id)
-	    };
+	        }
+	      });
+	    });
+	  } // `validateEntitiesAsync()`   (private)
+	  // Schedule validation for many entities.
+	  //
+	  // Arguments
+	  //   `entityIDs` - Array or Set containing entityIDs.
+	  //   `graph` - the graph to validate that contains those entities
+	  //   `cache` - the cache to store results in (_headCache or _baseCache)
+	  //
+	  // Returns
+	  //   A Promise fulfilled when the validation has completed.
+	  //   This may take time but happen in the background during browser idle time.
+	  //
 
-	    cache.cacheIssues = function(issues) {
-	        issues.forEach(function(issue) {
-	            var entityIds = issue.entityIds || [];
-	            entityIds.forEach(function(entityId) {
-	                if (!cache.issuesByEntityID[entityId]) {
-	                    cache.issuesByEntityID[entityId] = new Set();
-	                }
-	                cache.issuesByEntityID[entityId].add(issue.id);
-	            });
-	            cache.issuesByIssueID[issue.id] = issue;
-	        });
-	    };
 
-	    cache.uncacheIssue = function(issue) {
-	        // When multiple entities are involved (e.g. crossing_ways),
-	        // remove this issue from the other entity caches too..
-	        var entityIds = issue.entityIds || [];
-	        entityIds.forEach(function(entityId) {
-	            if (cache.issuesByEntityID[entityId]) {
-	                cache.issuesByEntityID[entityId].delete(issue.id);
-	            }
-	        });
-	        delete cache.issuesByIssueID[issue.id];
-	    };
+	  function validateEntitiesAsync(entityIDs, cache) {
+	    // Enqueue the work
+	    var jobs = Array.from(entityIDs).map(function (entityID) {
+	      if (cache.queuedEntityIDs.has(entityID)) return null; // queued already
 
-	    cache.uncacheIssues = function(issues) {
-	        issues.forEach(cache.uncacheIssue);
-	    };
+	      cache.queuedEntityIDs.add(entityID); // Clear caches for existing issues related to this entity
 
-	    cache.uncacheIssuesOfType = function(type) {
-	        var issuesOfType = Object.values(cache.issuesByIssueID)
-	            .filter(function(issue) { return issue.type === type; });
-	        cache.uncacheIssues(issuesOfType);
-	    };
+	      cache.uncacheEntityID(entityID);
+	      return function () {
+	        cache.queuedEntityIDs["delete"](entityID);
+	        var graph = cache.graph;
+	        if (!graph) return; // was reset?
 
-	    //
-	    // Remove a single entity and all its related issues from the caches
-	    //
-	    cache.uncacheEntityID = function(entityID) {
-	        var issueIDs = cache.issuesByEntityID[entityID];
-	        if (!issueIDs) { return; }
-
-	        issueIDs.forEach(function(issueID) {
-	            var issue = cache.issuesByIssueID[issueID];
-	            if (issue) {
-	                cache.uncacheIssue(issue);
-	            } else {
-	                delete cache.issuesByIssueID[issueID];
-	            }
-	        });
+	        var entity = graph.hasEntity(entityID); // Sanity check: don't validate deleted entities
 
-	        delete cache.issuesByEntityID[entityID];
-	    };
+	        if (!entity) return; // detect new issues and update caches
 
-	    return cache;
-	}
+	        var result = validateEntity(entity, graph);
 
-	function coreUploader(context) {
+	        if (result.provisional) {
+	          // provisional result
+	          cache.provisionalEntityIDs.add(entityID); // we'll need to revalidate this entity again later
+	        }
 
-	    var dispatch$1 = dispatch(
-	        // Start and end events are dispatched exactly once each per legitimate outside call to `save`
-	        'saveStarted', // dispatched as soon as a call to `save` has been deemed legitimate
-	        'saveEnded',   // dispatched after the result event has been dispatched
+	        cache.cacheIssues(result.issues); // update cache
+	      };
+	    }).filter(Boolean); // Perform the work in chunks.
+	    // Because this will happen during idle callbacks, we want to choose a chunk size
+	    // that won't make the browser stutter too badly.
+
+	    cache.queue = cache.queue.concat(utilArrayChunk(jobs, 100)); // Perform the work
+
+	    if (cache.queuePromise) return cache.queuePromise;
+	    cache.queuePromise = processQueue(cache).then(function () {
+	      return revalidateProvisionalEntities(cache);
+	    })["catch"](function () {
+	      /* ignore */
+	    })["finally"](function () {
+	      return cache.queuePromise = null;
+	    });
+	    return cache.queuePromise;
+	  } // `revalidateProvisionalEntities()`   (private)
+	  // Sometimes a validator will return a "provisional" result.
+	  // In this situation, we'll need to revalidate the entity later.
+	  // This function waits a delay, then places them back into the validation queue.
+	  //
+	  // Arguments
+	  //   `cache` - The cache (_headCache or _baseCache)
+	  //
 
-	        'willAttemptUpload', // dispatched before the actual upload call occurs, if it will
-	        'progressChanged',
 
-	        // Each save results in one of these outcomes:
-	        'resultNoChanges', // upload wasn't attempted since there were no edits
-	        'resultErrors',    // upload failed due to errors
-	        'resultConflicts', // upload failed due to data conflicts
-	        'resultSuccess'    // upload completed without errors
-	    );
+	  function revalidateProvisionalEntities(cache) {
+	    if (!cache.provisionalEntityIDs.size) return; // nothing to do
 
-	    var _isSaving = false;
+	    var handle = window.setTimeout(function () {
+	      _deferredST["delete"](handle);
 
-	    var _conflicts = [];
-	    var _errors = [];
-	    var _origChanges;
+	      if (!cache.provisionalEntityIDs.size) return; // nothing to do
 
-	    var _discardTags = {};
-	    _mainFileFetcher.get('discarded')
-	        .then(function(d) { _discardTags = d; })
-	        .catch(function() { /* ignore */ });
+	      validateEntitiesAsync(Array.from(cache.provisionalEntityIDs), cache);
+	    }, RETRY);
 
-	    var uploader = utilRebind({}, dispatch$1, 'on');
+	    _deferredST.add(handle);
+	  } // `processQueue(queue)`   (private)
+	  // Process the next chunk of deferred validation work
+	  //
+	  // Arguments
+	  //   `cache` - The cache (_headCache or _baseCache)
+	  //
+	  // Returns
+	  //   A Promise fulfilled when the validation has completed.
+	  //   This may take time but happen in the background during browser idle time.
+	  //
 
-	    uploader.isSaving = function() {
-	        return _isSaving;
-	    };
 
-	    uploader.save = function(changeset, tryAgain, checkConflicts) {
-	        // Guard against accidentally entering save code twice - #4641
-	        if (_isSaving && !tryAgain) {
-	            return;
-	        }
+	  function processQueue(cache) {
+	    // console.log(`${cache.which} queue length ${cache.queue.length}`);
+	    if (!cache.queue.length) return Promise.resolve(); // we're done
 
-	        var osm = context.connection();
-	        if (!osm) { return; }
+	    var chunk = cache.queue.pop();
+	    return new Promise(function (resolvePromise) {
+	      var handle = window.requestIdleCallback(function () {
+	        _deferredRIC["delete"](handle); // const t0 = performance.now();
 
-	        // If user somehow got logged out mid-save, try to reauthenticate..
-	        // This can happen if they were logged in from before, but the tokens are no longer valid.
-	        if (!osm.authenticated()) {
-	            osm.authenticate(function(err) {
-	                if (!err) {
-	                    uploader.save(changeset, tryAgain, checkConflicts);  // continue where we left off..
-	                }
-	            });
-	            return;
-	        }
 
-	        if (!_isSaving) {
-	            _isSaving = true;
-	            dispatch$1.call('saveStarted', this);
-	        }
+	        chunk.forEach(function (job) {
+	          return job();
+	        }); // const t1 = performance.now();
+	        // console.log('chunk processed in ' + (t1 - t0) + ' ms');
 
-	        var history = context.history();
+	        resolvePromise();
+	      });
 
-	        _conflicts = [];
-	        _errors = [];
+	      _deferredRIC.add(handle);
+	    }).then(function () {
+	      // dispatch an event sometimes to redraw various UI things
+	      if (cache.queue.length % 25 === 0) dispatch.call('validated');
+	    }).then(function () {
+	      return processQueue(cache);
+	    });
+	  }
 
-	        // Store original changes, in case user wants to download them as an .osc file
-	        _origChanges = history.changes(actionDiscardTags(history.difference(), _discardTags));
+	  return validator;
+	} // `validationCache()`   (private)
+	// Creates a cache to store validation state
+	// We create 2 of these:
+	//   `_baseCache` for validation on the base graph (unedited)
+	//   `_headCache` for validation on the head graph (user edits applied)
+	//
+	// Arguments
+	//   `which` - just a String 'base' or 'head' to keep track of it
+	//
 
-	        // First time, `history.perform` a no-op action.
-	        // Any conflict resolutions will be done as `history.replace`
-	        // Remember to pop this later if needed
-	        if (!tryAgain) {
-	            history.perform(actionNoop());
-	        }
+	function validationCache(which) {
+	  var cache = {
+	    which: which,
+	    graph: null,
+	    queue: [],
+	    queuePromise: null,
+	    queuedEntityIDs: new Set(),
+	    provisionalEntityIDs: new Set(),
+	    issuesByIssueID: {},
+	    // issue.id -> issue
+	    issuesByEntityID: {} // entity.id -> Set(issue.id)
 
-	        // Attempt a fast upload.. If there are conflicts, re-enter with `checkConflicts = true`
-	        if (!checkConflicts) {
-	            upload(changeset);
+	  };
 
-	        // Do the full (slow) conflict check..
-	        } else {
-	            performFullConflictCheck(changeset);
-	        }
+	  cache.cacheIssue = function (issue) {
+	    (issue.entityIds || []).forEach(function (entityID) {
+	      if (!cache.issuesByEntityID[entityID]) {
+	        cache.issuesByEntityID[entityID] = new Set();
+	      }
 
-	    };
+	      cache.issuesByEntityID[entityID].add(issue.id);
+	    });
+	    cache.issuesByIssueID[issue.id] = issue;
+	  };
 
+	  cache.uncacheIssue = function (issue) {
+	    (issue.entityIds || []).forEach(function (entityID) {
+	      if (cache.issuesByEntityID[entityID]) {
+	        cache.issuesByEntityID[entityID]["delete"](issue.id);
+	      }
+	    });
+	    delete cache.issuesByIssueID[issue.id];
+	  };
 
-	    function performFullConflictCheck(changeset) {
+	  cache.cacheIssues = function (issues) {
+	    issues.forEach(cache.cacheIssue);
+	  };
 
-	        var osm = context.connection();
-	        if (!osm) { return; }
+	  cache.uncacheIssues = function (issues) {
+	    issues.forEach(cache.uncacheIssue);
+	  };
 
-	        var history = context.history();
+	  cache.uncacheIssuesOfType = function (type) {
+	    var issuesOfType = Object.values(cache.issuesByIssueID).filter(function (issue) {
+	      return issue.type === type;
+	    });
+	    cache.uncacheIssues(issuesOfType);
+	  }; // Remove a single entity and all its related issues from the caches
 
-	        var localGraph = context.graph();
-	        var remoteGraph = coreGraph(history.base(), true);
 
-	        var summary = history.difference().summary();
-	        var _toCheck = [];
-	        for (var i = 0; i < summary.length; i++) {
-	            var item = summary[i];
-	            if (item.changeType === 'modified') {
-	                _toCheck.push(item.entity.id);
-	            }
-	        }
+	  cache.uncacheEntityID = function (entityID) {
+	    var entityIssueIDs = cache.issuesByEntityID[entityID];
 
-	        var _toLoad = withChildNodes(_toCheck, localGraph);
-	        var _loaded = {};
-	        var _toLoadCount = 0;
-	        var _toLoadTotal = _toLoad.length;
+	    if (entityIssueIDs) {
+	      entityIssueIDs.forEach(function (issueID) {
+	        var issue = cache.issuesByIssueID[issueID];
 
-	        if (_toCheck.length) {
-	            dispatch$1.call('progressChanged', this, _toLoadCount, _toLoadTotal);
-	            _toLoad.forEach(function(id) { _loaded[id] = false; });
-	            osm.loadMultiple(_toLoad, loaded);
+	        if (issue) {
+	          cache.uncacheIssue(issue);
 	        } else {
-	            upload(changeset);
+	          // shouldn't happen, clean up
+	          delete cache.issuesByIssueID[issueID];
 	        }
+	      });
+	    }
 
-	        return;
+	    delete cache.issuesByEntityID[entityID];
+	    cache.provisionalEntityIDs["delete"](entityID);
+	  }; // Return the expandeded set of entityIDs related to issues for the given entityIDs
+	  //
+	  // Arguments
+	  //   `entityIDs` - Array or Set containing entityIDs.
+	  //
 
-	        function withChildNodes(ids, graph) {
-	            var s = new Set(ids);
-	            ids.forEach(function(id) {
-	                var entity = graph.entity(id);
-	                if (entity.type !== 'way') { return; }
 
-	                graph.childNodes(entity).forEach(function(child) {
-	                    if (child.version !== undefined) {
-	                        s.add(child.id);
-	                    }
-	                });
+	  cache.withAllRelatedEntities = function (entityIDs) {
+	    var result = new Set();
+	    (entityIDs || []).forEach(function (entityID) {
+	      result.add(entityID); // include self
+
+	      var entityIssueIDs = cache.issuesByEntityID[entityID];
+
+	      if (entityIssueIDs) {
+	        entityIssueIDs.forEach(function (issueID) {
+	          var issue = cache.issuesByIssueID[issueID];
+
+	          if (issue) {
+	            (issue.entityIds || []).forEach(function (relatedID) {
+	              return result.add(relatedID);
 	            });
+	          } else {
+	            // shouldn't happen, clean up
+	            delete cache.issuesByIssueID[issueID];
+	          }
+	        });
+	      }
+	    });
+	    return result;
+	  };
 
-	            return Array.from(s);
-	        }
+	  return cache;
+	}
 
+	function coreUploader(context) {
+	  var dispatch = dispatch$8( // Start and end events are dispatched exactly once each per legitimate outside call to `save`
+	  'saveStarted', // dispatched as soon as a call to `save` has been deemed legitimate
+	  'saveEnded', // dispatched after the result event has been dispatched
+	  'willAttemptUpload', // dispatched before the actual upload call occurs, if it will
+	  'progressChanged', // Each save results in one of these outcomes:
+	  'resultNoChanges', // upload wasn't attempted since there were no edits
+	  'resultErrors', // upload failed due to errors
+	  'resultConflicts', // upload failed due to data conflicts
+	  'resultSuccess' // upload completed without errors
+	  );
+	  var _isSaving = false;
+	  var _conflicts = [];
+	  var _errors = [];
 
-	        // Reload modified entities into an alternate graph and check for conflicts..
-	        function loaded(err, result) {
-	            if (_errors.length) { return; }
+	  var _origChanges;
 
-	            if (err) {
-	                _errors.push({
-	                    msg: err.message || err.responseText,
-	                    details: [ _t('save.status_code', { code: err.status }) ]
-	                });
-	                didResultInErrors();
+	  var _discardTags = {};
+	  _mainFileFetcher.get('discarded').then(function (d) {
+	    _discardTags = d;
+	  })["catch"](function () {
+	    /* ignore */
+	  });
+	  var uploader = utilRebind({}, dispatch, 'on');
 
-	            } else {
-	                var loadMore = [];
-
-	                result.data.forEach(function(entity) {
-	                    remoteGraph.replace(entity);
-	                    _loaded[entity.id] = true;
-	                    _toLoad = _toLoad.filter(function(val) { return val !== entity.id; });
-
-	                    if (!entity.visible) { return; }
-
-	                    // Because loadMultiple doesn't download /full like loadEntity,
-	                    // need to also load children that aren't already being checked..
-	                    var i, id;
-	                    if (entity.type === 'way') {
-	                        for (i = 0; i < entity.nodes.length; i++) {
-	                            id = entity.nodes[i];
-	                            if (_loaded[id] === undefined) {
-	                                _loaded[id] = false;
-	                                loadMore.push(id);
-	                            }
-	                        }
-	                    } else if (entity.type === 'relation' && entity.isMultipolygon()) {
-	                        for (i = 0; i < entity.members.length; i++) {
-	                            id = entity.members[i].id;
-	                            if (_loaded[id] === undefined) {
-	                                _loaded[id] = false;
-	                                loadMore.push(id);
-	                            }
-	                        }
-	                    }
-	                });
+	  uploader.isSaving = function () {
+	    return _isSaving;
+	  };
 
-	                _toLoadCount += result.data.length;
-	                _toLoadTotal += loadMore.length;
-	                dispatch$1.call('progressChanged', this, _toLoadCount, _toLoadTotal);
+	  uploader.save = function (changeset, tryAgain, checkConflicts) {
+	    // Guard against accidentally entering save code twice - #4641
+	    if (_isSaving && !tryAgain) {
+	      return;
+	    }
 
-	                if (loadMore.length) {
-	                    _toLoad.push.apply(_toLoad, loadMore);
-	                    osm.loadMultiple(loadMore, loaded);
-	                }
+	    var osm = context.connection();
+	    if (!osm) return; // If user somehow got logged out mid-save, try to reauthenticate..
+	    // This can happen if they were logged in from before, but the tokens are no longer valid.
 
-	                if (!_toLoad.length) {
-	                    detectConflicts();
-	                    upload(changeset);
-	                }
-	            }
+	    if (!osm.authenticated()) {
+	      osm.authenticate(function (err) {
+	        if (!err) {
+	          uploader.save(changeset, tryAgain, checkConflicts); // continue where we left off..
 	        }
+	      });
+	      return;
+	    }
 
+	    if (!_isSaving) {
+	      _isSaving = true;
+	      dispatch.call('saveStarted', this);
+	    }
 
-	        function detectConflicts() {
-	            function choice(id, text, action) {
-	                return {
-	                    id: id,
-	                    text: text,
-	                    action: function() {
-	                        history.replace(action);
-	                    }
-	                };
-	            }
-	            function formatUser(d) {
-	                return '<a href="' + osm.userURL(d) + '" target="_blank">' + d + '</a>';
-	            }
-	            function entityName(entity) {
-	                return utilDisplayName(entity) || (utilDisplayType(entity.id) + ' ' + entity.id);
-	            }
+	    var history = context.history();
+	    _conflicts = [];
+	    _errors = []; // Store original changes, in case user wants to download them as an .osc file
 
-	            function sameVersions(local, remote) {
-	                if (local.version !== remote.version) { return false; }
+	    _origChanges = history.changes(actionDiscardTags(history.difference(), _discardTags)); // First time, `history.perform` a no-op action.
+	    // Any conflict resolutions will be done as `history.replace`
+	    // Remember to pop this later if needed
 
-	                if (local.type === 'way') {
-	                    var children = utilArrayUnion(local.nodes, remote.nodes);
-	                    for (var i = 0; i < children.length; i++) {
-	                        var a = localGraph.hasEntity(children[i]);
-	                        var b = remoteGraph.hasEntity(children[i]);
-	                        if (a && b && a.version !== b.version) { return false; }
-	                    }
-	                }
+	    if (!tryAgain) {
+	      history.perform(actionNoop());
+	    } // Attempt a fast upload.. If there are conflicts, re-enter with `checkConflicts = true`
 
-	                return true;
-	            }
 
-	            _toCheck.forEach(function(id) {
-	                var local = localGraph.entity(id);
-	                var remote = remoteGraph.entity(id);
+	    if (!checkConflicts) {
+	      upload(changeset); // Do the full (slow) conflict check..
+	    } else {
+	      performFullConflictCheck(changeset);
+	    }
+	  };
+
+	  function performFullConflictCheck(changeset) {
+	    var osm = context.connection();
+	    if (!osm) return;
+	    var history = context.history();
+	    var localGraph = context.graph();
+	    var remoteGraph = coreGraph(history.base(), true);
+	    var summary = history.difference().summary();
+	    var _toCheck = [];
+
+	    for (var i = 0; i < summary.length; i++) {
+	      var item = summary[i];
 
-	                if (sameVersions(local, remote)) { return; }
+	      if (item.changeType === 'modified') {
+	        _toCheck.push(item.entity.id);
+	      }
+	    }
 
-	                var merge = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags, formatUser);
+	    var _toLoad = withChildNodes(_toCheck, localGraph);
 
-	                history.replace(merge);
+	    var _loaded = {};
+	    var _toLoadCount = 0;
+	    var _toLoadTotal = _toLoad.length;
 
-	                var mergeConflicts = merge.conflicts();
-	                if (!mergeConflicts.length) { return; }  // merged safely
+	    if (_toCheck.length) {
+	      dispatch.call('progressChanged', this, _toLoadCount, _toLoadTotal);
 
-	                var forceLocal = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags).withOption('force_local');
-	                var forceRemote = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags).withOption('force_remote');
-	                var keepMine = _t('save.conflict.' + (remote.visible ? 'keep_local' : 'restore'));
-	                var keepTheirs = _t('save.conflict.' + (remote.visible ? 'keep_remote' : 'delete'));
+	      _toLoad.forEach(function (id) {
+	        _loaded[id] = false;
+	      });
 
-	                _conflicts.push({
-	                    id: id,
-	                    name: entityName(local),
-	                    details: mergeConflicts,
-	                    chosen: 1,
-	                    choices: [
-	                        choice(id, keepMine, forceLocal),
-	                        choice(id, keepTheirs, forceRemote)
-	                    ]
-	                });
-	            });
-	        }
+	      osm.loadMultiple(_toLoad, loaded);
+	    } else {
+	      upload(changeset);
 	    }
 
+	    return;
 
-	    function upload(changeset) {
-	        var osm = context.connection();
-	        if (!osm) {
-	            _errors.push({ msg: 'No OSM Service' });
-	        }
+	    function withChildNodes(ids, graph) {
+	      var s = new Set(ids);
+	      ids.forEach(function (id) {
+	        var entity = graph.entity(id);
+	        if (entity.type !== 'way') return;
+	        graph.childNodes(entity).forEach(function (child) {
+	          if (child.version !== undefined) {
+	            s.add(child.id);
+	          }
+	        });
+	      });
+	      return Array.from(s);
+	    } // Reload modified entities into an alternate graph and check for conflicts..
 
-	        if (_conflicts.length) {
-	            didResultInConflicts(changeset);
 
-	        } else if (_errors.length) {
-	            didResultInErrors();
+	    function loaded(err, result) {
+	      if (_errors.length) return;
 
-	        } else {
-	            var history = context.history();
-	            var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
-	            if (changes.modified.length || changes.created.length || changes.deleted.length) {
+	      if (err) {
+	        _errors.push({
+	          msg: err.message || err.responseText,
+	          details: [_t('save.status_code', {
+	            code: err.status
+	          })]
+	        });
 
-	                dispatch$1.call('willAttemptUpload', this);
+	        didResultInErrors();
+	      } else {
+	        var loadMore = [];
+	        result.data.forEach(function (entity) {
+	          remoteGraph.replace(entity);
+	          _loaded[entity.id] = true;
+	          _toLoad = _toLoad.filter(function (val) {
+	            return val !== entity.id;
+	          });
+	          if (!entity.visible) return; // Because loadMultiple doesn't download /full like loadEntity,
+	          // need to also load children that aren't already being checked..
 
-	                osm.putChangeset(changeset, changes, uploadCallback);
+	          var i, id;
 
-	            } else {
-	                // changes were insignificant or reverted by user
-	                didResultInNoChanges();
-	            }
-	        }
-	    }
+	          if (entity.type === 'way') {
+	            for (i = 0; i < entity.nodes.length; i++) {
+	              id = entity.nodes[i];
 
+	              if (_loaded[id] === undefined) {
+	                _loaded[id] = false;
+	                loadMore.push(id);
+	              }
+	            }
+	          } else if (entity.type === 'relation' && entity.isMultipolygon()) {
+	            for (i = 0; i < entity.members.length; i++) {
+	              id = entity.members[i].id;
 
-	    function uploadCallback(err, changeset) {
-	        if (err) {
-	            if (err.status === 409) {  // 409 Conflict
-	                uploader.save(changeset, true, true);  // tryAgain = true, checkConflicts = true
-	            } else {
-	                _errors.push({
-	                    msg: err.message || err.responseText,
-	                    details: [ _t('save.status_code', { code: err.status }) ]
-	                });
-	                didResultInErrors();
+	              if (_loaded[id] === undefined) {
+	                _loaded[id] = false;
+	                loadMore.push(id);
+	              }
 	            }
+	          }
+	        });
+	        _toLoadCount += result.data.length;
+	        _toLoadTotal += loadMore.length;
+	        dispatch.call('progressChanged', this, _toLoadCount, _toLoadTotal);
 
-	        } else {
-	            didResultInSuccess(changeset);
+	        if (loadMore.length) {
+	          _toLoad.push.apply(_toLoad, loadMore);
+
+	          osm.loadMultiple(loadMore, loaded);
+	        }
+
+	        if (!_toLoad.length) {
+	          detectConflicts();
+	          upload(changeset);
 	        }
+	      }
 	    }
 
-	    function didResultInNoChanges() {
+	    function detectConflicts() {
+	      function choice(id, text, _action) {
+	        return {
+	          id: id,
+	          text: text,
+	          action: function action() {
+	            history.replace(_action);
+	          }
+	        };
+	      }
 
-	        dispatch$1.call('resultNoChanges', this);
+	      function formatUser(d) {
+	        return '<a href="' + osm.userURL(d) + '" target="_blank">' + d + '</a>';
+	      }
 
-	        endSave();
+	      function entityName(entity) {
+	        return utilDisplayName(entity) || utilDisplayType(entity.id) + ' ' + entity.id;
+	      }
 
-	        context.flush(); // reset iD
-	    }
+	      function sameVersions(local, remote) {
+	        if (local.version !== remote.version) return false;
 
-	    function didResultInErrors() {
+	        if (local.type === 'way') {
+	          var children = utilArrayUnion(local.nodes, remote.nodes);
 
-	        context.history().pop();
+	          for (var i = 0; i < children.length; i++) {
+	            var a = localGraph.hasEntity(children[i]);
+	            var b = remoteGraph.hasEntity(children[i]);
+	            if (a && b && a.version !== b.version) return false;
+	          }
+	        }
 
-	        dispatch$1.call('resultErrors', this, _errors);
+	        return true;
+	      }
 
-	        endSave();
+	      _toCheck.forEach(function (id) {
+	        var local = localGraph.entity(id);
+	        var remote = remoteGraph.entity(id);
+	        if (sameVersions(local, remote)) return;
+	        var merge = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags, formatUser);
+	        history.replace(merge);
+	        var mergeConflicts = merge.conflicts();
+	        if (!mergeConflicts.length) return; // merged safely
+
+	        var forceLocal = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags).withOption('force_local');
+	        var forceRemote = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags).withOption('force_remote');
+	        var keepMine = _t('save.conflict.' + (remote.visible ? 'keep_local' : 'restore'));
+	        var keepTheirs = _t('save.conflict.' + (remote.visible ? 'keep_remote' : 'delete'));
+
+	        _conflicts.push({
+	          id: id,
+	          name: entityName(local),
+	          details: mergeConflicts,
+	          chosen: 1,
+	          choices: [choice(id, keepMine, forceLocal), choice(id, keepTheirs, forceRemote)]
+	        });
+	      });
 	    }
+	  }
 
+	  function upload(changeset) {
+	    var osm = context.connection();
 
-	    function didResultInConflicts(changeset) {
-
-	        _conflicts.sort(function(a, b) { return b.id.localeCompare(a.id); });
+	    if (!osm) {
+	      _errors.push({
+	        msg: 'No OSM Service'
+	      });
+	    }
 
-	        dispatch$1.call('resultConflicts', this, changeset, _conflicts, _origChanges);
+	    if (_conflicts.length) {
+	      didResultInConflicts(changeset);
+	    } else if (_errors.length) {
+	      didResultInErrors();
+	    } else {
+	      var history = context.history();
+	      var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
 
-	        endSave();
+	      if (changes.modified.length || changes.created.length || changes.deleted.length) {
+	        dispatch.call('willAttemptUpload', this);
+	        osm.putChangeset(changeset, changes, uploadCallback);
+	      } else {
+	        // changes were insignificant or reverted by user
+	        didResultInNoChanges();
+	      }
 	    }
+	  }
 
+	  function uploadCallback(err, changeset) {
+	    if (err) {
+	      if (err.status === 409) {
+	        // 409 Conflict
+	        uploader.save(changeset, true, true); // tryAgain = true, checkConflicts = true
+	      } else {
+	        _errors.push({
+	          msg: err.message || err.responseText,
+	          details: [_t('save.status_code', {
+	            code: err.status
+	          })]
+	        });
 
-	    function didResultInSuccess(changeset) {
-
-	        // delete the edit stack cached to local storage
-	        context.history().clearSaved();
+	        didResultInErrors();
+	      }
+	    } else {
+	      didResultInSuccess(changeset);
+	    }
+	  }
 
-	        dispatch$1.call('resultSuccess', this, changeset);
+	  function didResultInNoChanges() {
+	    dispatch.call('resultNoChanges', this);
+	    endSave();
+	    context.flush(); // reset iD
+	  }
 
-	        // Add delay to allow for postgres replication #1646 #2678
-	        window.setTimeout(function() {
+	  function didResultInErrors() {
+	    context.history().pop();
+	    dispatch.call('resultErrors', this, _errors);
+	    endSave();
+	  }
 
-	            endSave();
+	  function didResultInConflicts(changeset) {
+	    _conflicts.sort(function (a, b) {
+	      return b.id.localeCompare(a.id);
+	    });
 
-	            context.flush(); // reset iD
-	        }, 2500);
-	    }
+	    dispatch.call('resultConflicts', this, changeset, _conflicts, _origChanges);
+	    endSave();
+	  }
 
+	  function didResultInSuccess(changeset) {
+	    // delete the edit stack cached to local storage
+	    context.history().clearSaved();
+	    dispatch.call('resultSuccess', this, changeset); // Add delay to allow for postgres replication #1646 #2678
 
-	    function endSave() {
-	        _isSaving = false;
+	    window.setTimeout(function () {
+	      endSave();
+	      context.flush(); // reset iD
+	    }, 2500);
+	  }
 
-	        dispatch$1.call('saveEnded', this);
-	    }
+	  function endSave() {
+	    _isSaving = false;
+	    dispatch.call('saveEnded', this);
+	  }
 
+	  uploader.cancelConflictResolution = function () {
+	    context.history().pop();
+	  };
 
-	    uploader.cancelConflictResolution = function() {
-	        context.history().pop();
-	    };
+	  uploader.processResolvedConflicts = function (changeset) {
+	    var history = context.history();
 
+	    for (var i = 0; i < _conflicts.length; i++) {
+	      if (_conflicts[i].chosen === 1) {
+	        // user chose "use theirs"
+	        var entity = context.hasEntity(_conflicts[i].id);
 
-	    uploader.processResolvedConflicts = function(changeset) {
-	        var history = context.history();
+	        if (entity && entity.type === 'way') {
+	          var children = utilArrayUniq(entity.nodes);
 
-	        for (var i = 0; i < _conflicts.length; i++) {
-	            if (_conflicts[i].chosen === 1) {  // user chose "use theirs"
-	                var entity = context.hasEntity(_conflicts[i].id);
-	                if (entity && entity.type === 'way') {
-	                    var children = utilArrayUniq(entity.nodes);
-	                    for (var j = 0; j < children.length; j++) {
-	                        history.replace(actionRevert(children[j]));
-	                    }
-	                }
-	                history.replace(actionRevert(_conflicts[i].id));
-	            }
+	          for (var j = 0; j < children.length; j++) {
+	            history.replace(actionRevert(children[j]));
+	          }
 	        }
 
-	        uploader.save(changeset, true, false);  // tryAgain = true, checkConflicts = false
-	    };
-
-
-	    uploader.reset = function() {
+	        history.replace(actionRevert(_conflicts[i].id));
+	      }
+	    }
 
-	    };
+	    uploader.save(changeset, true, false); // tryAgain = true, checkConflicts = false
+	  };
 
+	  uploader.reset = function () {};
 
-	    return uploader;
+	  return uploader;
 	}
 
-	var isRetina = window.devicePixelRatio && window.devicePixelRatio >= 2;
+	var $$3 = _export;
+	var fails = fails$N;
+	var expm1 = mathExpm1;
+
+	var abs = Math.abs;
+	var exp = Math.exp;
+	var E = Math.E;
 
-	// listen for DPI change, e.g. when dragging a browser window from a retina to non-retina screen
-	window.matchMedia("\n        (-webkit-min-device-pixel-ratio: 2), /* Safari */\n        (min-resolution: 2dppx),             /* standard */\n        (min-resolution: 192dpi)             /* fallback */\n    ").addListener(function() {
+	var FORCED = fails(function () {
+	  // eslint-disable-next-line es/no-math-sinh -- required for testing
+	  return Math.sinh(-2e-17) != -2e-17;
+	});
 
-	    isRetina = window.devicePixelRatio && window.devicePixelRatio >= 2;
+	// `Math.sinh` method
+	// https://tc39.es/ecma262/#sec-math.sinh
+	// V8 near Chromium 38 has a problem with very small numbers
+	$$3({ target: 'Math', stat: true, forced: FORCED }, {
+	  sinh: function sinh(x) {
+	    return abs(x = +x) < 1 ? (expm1(x) - expm1(-x)) / 2 : (exp(x - 1) - exp(-x - 1)) * (E / 2);
+	  }
 	});
 
+	var isRetina = window.devicePixelRatio && window.devicePixelRatio >= 2; // listen for DPI change, e.g. when dragging a browser window from a retina to non-retina screen
+
+	window.matchMedia("\n        (-webkit-min-device-pixel-ratio: 2), /* Safari */\n        (min-resolution: 2dppx),             /* standard */\n        (min-resolution: 192dpi)             /* fallback */\n    ").addListener(function () {
+	  isRetina = window.devicePixelRatio && window.devicePixelRatio >= 2;
+	});
 
 	function localeDateString(s) {
-	    if (!s) { return null; }
-	    var options = { day: 'numeric', month: 'short', year: 'numeric' };
-	    var d = new Date(s);
-	    if (isNaN(d.getTime())) { return null; }
-	    return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+	  if (!s) return null;
+	  var options = {
+	    day: 'numeric',
+	    month: 'short',
+	    year: 'numeric'
+	  };
+	  var d = new Date(s);
+	  if (isNaN(d.getTime())) return null;
+	  return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
 	}
 
 	function vintageRange(vintage) {
-	    var s;
-	    if (vintage.start || vintage.end) {
-	        s = (vintage.start || '?');
-	        if (vintage.start !== vintage.end) {
-	            s += ' - ' + (vintage.end || '?');
-	        }
-	    }
-	    return s;
-	}
+	  var s;
 
+	  if (vintage.start || vintage.end) {
+	    s = vintage.start || '?';
 
-	function rendererBackgroundSource(data) {
-	    var source = Object.assign({}, data);   // shallow copy
-	    var _offset = [0, 0];
-	    var _name = source.name;
-	    var _description = source.description;
-	    var _best = !!source.best;
-	    var _template = source.encrypted ? utilAesDecrypt(source.template) : source.template;
-
-	    source.tileSize = data.tileSize || 256;
-	    source.zoomExtent = data.zoomExtent || [0, 22];
-	    source.overzoom = data.overzoom !== false;
-
-	    source.offset = function(val) {
-	        if (!arguments.length) { return _offset; }
-	        _offset = val;
-	        return source;
-	    };
+	    if (vintage.start !== vintage.end) {
+	      s += ' - ' + (vintage.end || '?');
+	    }
+	  }
 
+	  return s;
+	}
 
-	    source.nudge = function(val, zoomlevel) {
-	        _offset[0] += val[0] / Math.pow(2, zoomlevel);
-	        _offset[1] += val[1] / Math.pow(2, zoomlevel);
-	        return source;
-	    };
+	function rendererBackgroundSource(data) {
+	  var source = Object.assign({}, data); // shallow copy
 
+	  var _offset = [0, 0];
+	  var _name = source.name;
+	  var _description = source.description;
 
-	    source.name = function() {
-	        var id_safe = source.id.replace(/\./g, '<TX_DOT>');
-	        return _t('imagery.' + id_safe + '.name', { default: _name });
-	    };
+	  var _best = !!source.best;
 
+	  var _template = source.encrypted ? utilAesDecrypt(source.template) : source.template;
 
-	    source.description = function() {
-	        var id_safe = source.id.replace(/\./g, '<TX_DOT>');
-	        return _t('imagery.' + id_safe + '.description', { default: _description });
-	    };
+	  source.tileSize = data.tileSize || 256;
+	  source.zoomExtent = data.zoomExtent || [0, 22];
+	  source.overzoom = data.overzoom !== false;
 
+	  source.offset = function (val) {
+	    if (!arguments.length) return _offset;
+	    _offset = val;
+	    return source;
+	  };
 
-	    source.best = function() {
-	        return _best;
-	    };
+	  source.nudge = function (val, zoomlevel) {
+	    _offset[0] += val[0] / Math.pow(2, zoomlevel);
+	    _offset[1] += val[1] / Math.pow(2, zoomlevel);
+	    return source;
+	  };
 
+	  source.name = function () {
+	    var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+	    return _t('imagery.' + id_safe + '.name', {
+	      "default": _name
+	    });
+	  };
 
-	    source.area = function() {
-	        if (!data.polygon) { return Number.MAX_VALUE; }  // worldwide
-	        var area = d3_geoArea({ type: 'MultiPolygon', coordinates: [ data.polygon ] });
-	        return isNaN(area) ? 0 : area;
-	    };
+	  source.label = function () {
+	    var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+	    return _t.html('imagery.' + id_safe + '.name', {
+	      "default": _name
+	    });
+	  };
 
+	  source.description = function () {
+	    var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+	    return _t.html('imagery.' + id_safe + '.description', {
+	      "default": _description
+	    });
+	  };
 
-	    source.imageryUsed = function() {
-	        return name || source.id;
-	    };
+	  source.best = function () {
+	    return _best;
+	  };
 
+	  source.area = function () {
+	    if (!data.polygon) return Number.MAX_VALUE; // worldwide
 
-	    source.template = function(val) {
-	        if (!arguments.length) { return _template; }
-	        if (source.id === 'custom') {
-	            _template = val;
-	        }
-	        return source;
-	    };
+	    var area = d3_geoArea({
+	      type: 'MultiPolygon',
+	      coordinates: [data.polygon]
+	    });
+	    return isNaN(area) ? 0 : area;
+	  };
 
+	  source.imageryUsed = function () {
+	    return _name || source.id;
+	  };
 
-	    source.url = function(coord) {
-	        var result = _template;
-	        if (result === '') { return result; }   // source 'none'
+	  source.template = function (val) {
+	    if (!arguments.length) return _template;
 
+	    if (source.id === 'custom' || source.id === 'Bing') {
+	      _template = val;
+	    }
 
-	        // Guess a type based on the tokens present in the template
-	        // (This is for 'custom' source, where we don't know)
-	        if (!source.type) {
-	            if (/SERVICE=WMS|\{(proj|wkid|bbox)\}/.test(_template)) {
-	                source.type = 'wms';
-	                source.projection = 'EPSG:3857';  // guess
-	            } else if (/\{(x|y)\}/.test(_template)) {
-	                source.type = 'tms';
-	            } else if (/\{u\}/.test(_template)) {
-	                source.type = 'bing';
-	            }
-	        }
+	    return source;
+	  };
 
+	  source.url = function (coord) {
+	    var result = _template;
+	    if (result === '') return result; // source 'none'
+	    // Guess a type based on the tokens present in the template
+	    // (This is for 'custom' source, where we don't know)
+
+	    if (!source.type) {
+	      if (/SERVICE=WMS|\{(proj|wkid|bbox)\}/.test(_template)) {
+	        source.type = 'wms';
+	        source.projection = 'EPSG:3857'; // guess
+	      } else if (/\{(x|y)\}/.test(_template)) {
+	        source.type = 'tms';
+	      } else if (/\{u\}/.test(_template)) {
+	        source.type = 'bing';
+	      }
+	    }
 
-	        if (source.type === 'wms') {
-	            var tileToProjectedCoords = (function(x, y, z) {
-	                //polyfill for IE11, PhantomJS
-	                var sinh = Math.sinh || function(x) {
-	                    var y = Math.exp(x);
-	                    return (y - 1 / y) / 2;
-	                };
+	    if (source.type === 'wms') {
+	      var tileToProjectedCoords = function tileToProjectedCoords(x, y, z) {
+	        //polyfill for IE11, PhantomJS
+	        var sinh = Math.sinh || function (x) {
+	          var y = Math.exp(x);
+	          return (y - 1 / y) / 2;
+	        };
 
-	                var zoomSize = Math.pow(2, z);
-	                var lon = x / zoomSize * Math.PI * 2 - Math.PI;
-	                var lat = Math.atan(sinh(Math.PI * (1 - 2 * y / zoomSize)));
-
-	                switch (source.projection) {
-	                    case 'EPSG:4326':
-	                        return {
-	                            x: lon * 180 / Math.PI,
-	                            y: lat * 180 / Math.PI
-	                        };
-	                    default: // EPSG:3857 and synonyms
-	                        var mercCoords = mercatorRaw(lon, lat);
-	                        return {
-	                            x: 20037508.34 / Math.PI * mercCoords[0],
-	                            y: 20037508.34 / Math.PI * mercCoords[1]
-	                        };
-	                }
-	            });
+	        var zoomSize = Math.pow(2, z);
+	        var lon = x / zoomSize * Math.PI * 2 - Math.PI;
+	        var lat = Math.atan(sinh(Math.PI * (1 - 2 * y / zoomSize)));
 
-	            var tileSize = source.tileSize;
-	            var projection = source.projection;
-	            var minXmaxY = tileToProjectedCoords(coord[0], coord[1], coord[2]);
-	            var maxXminY = tileToProjectedCoords(coord[0]+1, coord[1]+1, coord[2]);
-
-	            result = result.replace(/\{(\w+)\}/g, function (token, key) {
-	              switch (key) {
-	                case 'width':
-	                case 'height':
-	                    return tileSize;
-	                case 'proj':
-	                    return projection;
-	                case 'wkid':
-	                    return projection.replace(/^EPSG:/, '');
-	                case 'bbox':
-	                    // WMS 1.3 flips x/y for some coordinate systems including EPSG:4326 - #7557
-	                    if (projection === 'EPSG:4326' &&
-	                        // The CRS parameter implies version 1.3 (prior versions use SRS)
-	                        /VERSION=1.3|CRS={proj}/.test(source.template())) {
-	                        return maxXminY.y + ',' + minXmaxY.x + ',' + minXmaxY.y + ',' + maxXminY.x;
-	                    } else {
-	                        return minXmaxY.x + ',' + maxXminY.y + ',' + maxXminY.x + ',' + minXmaxY.y;
-	                    }
-	                case 'w':
-	                    return minXmaxY.x;
-	                case 's':
-	                    return maxXminY.y;
-	                case 'n':
-	                    return maxXminY.x;
-	                case 'e':
-	                    return minXmaxY.y;
-	                default:
-	                    return token;
-	              }
-	            });
+	        switch (source.projection) {
+	          case 'EPSG:4326':
+	            return {
+	              x: lon * 180 / Math.PI,
+	              y: lat * 180 / Math.PI
+	            };
 
-	        } else if (source.type === 'tms') {
-	            result = result
-	                .replace('{x}', coord[0])
-	                .replace('{y}', coord[1])
-	                // TMS-flipped y coordinate
-	                .replace(/\{[t-]y\}/, Math.pow(2, coord[2]) - coord[1] - 1)
-	                .replace(/\{z(oom)?\}/, coord[2])
-	                // only fetch retina tiles for retina screens
-	                .replace(/\{@2x\}|\{r\}/, isRetina ? '@2x' : '');
-
-	        } else if (source.type === 'bing') {
-	            result = result
-	                .replace('{u}', function() {
-	                    var u = '';
-	                    for (var zoom = coord[2]; zoom > 0; zoom--) {
-	                        var b = 0;
-	                        var mask = 1 << (zoom - 1);
-	                        if ((coord[0] & mask) !== 0) { b++; }
-	                        if ((coord[1] & mask) !== 0) { b += 2; }
-	                        u += b.toString();
-	                    }
-	                    return u;
-	                });
+	          default:
+	            // EPSG:3857 and synonyms
+	            var mercCoords = mercatorRaw(lon, lat);
+	            return {
+	              x: 20037508.34 / Math.PI * mercCoords[0],
+	              y: 20037508.34 / Math.PI * mercCoords[1]
+	            };
 	        }
+	      };
 
-	        // these apply to any type..
-	        result = result.replace(/\{switch:([^}]+)\}/, function(s, r) {
-	            var subdomains = r.split(',');
-	            return subdomains[(coord[0] + coord[1]) % subdomains.length];
-	        });
+	      var tileSize = source.tileSize;
+	      var projection = source.projection;
+	      var minXmaxY = tileToProjectedCoords(coord[0], coord[1], coord[2]);
+	      var maxXminY = tileToProjectedCoords(coord[0] + 1, coord[1] + 1, coord[2]);
+	      result = result.replace(/\{(\w+)\}/g, function (token, key) {
+	        switch (key) {
+	          case 'width':
+	          case 'height':
+	            return tileSize;
+
+	          case 'proj':
+	            return projection;
+
+	          case 'wkid':
+	            return projection.replace(/^EPSG:/, '');
+
+	          case 'bbox':
+	            // WMS 1.3 flips x/y for some coordinate systems including EPSG:4326 - #7557
+	            if (projection === 'EPSG:4326' && // The CRS parameter implies version 1.3 (prior versions use SRS)
+	            /VERSION=1.3|CRS={proj}/.test(source.template().toUpperCase())) {
+	              return maxXminY.y + ',' + minXmaxY.x + ',' + minXmaxY.y + ',' + maxXminY.x;
+	            } else {
+	              return minXmaxY.x + ',' + maxXminY.y + ',' + maxXminY.x + ',' + minXmaxY.y;
+	            }
 
+	          case 'w':
+	            return minXmaxY.x;
 
-	        return result;
-	    };
+	          case 's':
+	            return maxXminY.y;
 
+	          case 'n':
+	            return maxXminY.x;
 
-	    source.validZoom = function(z) {
-	        return source.zoomExtent[0] <= z &&
-	            (source.overzoom || source.zoomExtent[1] > z);
-	    };
+	          case 'e':
+	            return minXmaxY.y;
 
+	          default:
+	            return token;
+	        }
+	      });
+	    } else if (source.type === 'tms') {
+	      result = result.replace('{x}', coord[0]).replace('{y}', coord[1]) // TMS-flipped y coordinate
+	      .replace(/\{[t-]y\}/, Math.pow(2, coord[2]) - coord[1] - 1).replace(/\{z(oom)?\}/, coord[2]) // only fetch retina tiles for retina screens
+	      .replace(/\{@2x\}|\{r\}/, isRetina ? '@2x' : '');
+	    } else if (source.type === 'bing') {
+	      result = result.replace('{u}', function () {
+	        var u = '';
+
+	        for (var zoom = coord[2]; zoom > 0; zoom--) {
+	          var b = 0;
+	          var mask = 1 << zoom - 1;
+	          if ((coord[0] & mask) !== 0) b++;
+	          if ((coord[1] & mask) !== 0) b += 2;
+	          u += b.toString();
+	        }
+
+	        return u;
+	      });
+	    } // these apply to any type..
 
-	    source.isLocatorOverlay = function() {
-	        return source.id === 'mapbox_locator_overlay';
-	    };
 
+	    result = result.replace(/\{switch:([^}]+)\}/, function (s, r) {
+	      var subdomains = r.split(',');
+	      return subdomains[(coord[0] + coord[1]) % subdomains.length];
+	    });
+	    return result;
+	  };
 
-	    /* hides a source from the list, but leaves it available for use */
-	    source.isHidden = function() {
-	        return source.id === 'DigitalGlobe-Premium-vintage' ||
-	            source.id === 'DigitalGlobe-Standard-vintage';
-	    };
+	  source.validZoom = function (z) {
+	    return source.zoomExtent[0] <= z && (source.overzoom || source.zoomExtent[1] > z);
+	  };
 
+	  source.isLocatorOverlay = function () {
+	    return source.id === 'mapbox_locator_overlay';
+	  };
+	  /* hides a source from the list, but leaves it available for use */
 
-	    source.copyrightNotices = function() {};
 
+	  source.isHidden = function () {
+	    return source.id === 'DigitalGlobe-Premium-vintage' || source.id === 'DigitalGlobe-Standard-vintage';
+	  };
 
-	    source.getMetadata = function(center, tileCoord, callback) {
-	        var vintage = {
-	            start: localeDateString(source.startDate),
-	            end: localeDateString(source.endDate)
-	        };
-	        vintage.range = vintageRange(vintage);
+	  source.copyrightNotices = function () {};
 
-	        var metadata = { vintage: vintage };
-	        callback(null, metadata);
+	  source.getMetadata = function (center, tileCoord, callback) {
+	    var vintage = {
+	      start: localeDateString(source.startDate),
+	      end: localeDateString(source.endDate)
 	    };
+	    vintage.range = vintageRange(vintage);
+	    var metadata = {
+	      vintage: vintage
+	    };
+	    callback(null, metadata);
+	  };
 
-
-	    return source;
+	  return source;
 	}
 
+	rendererBackgroundSource.Bing = function (data, dispatch) {
+	  // https://docs.microsoft.com/en-us/bingmaps/rest-services/imagery/get-imagery-metadata
+	  // https://docs.microsoft.com/en-us/bingmaps/rest-services/directly-accessing-the-bing-maps-tiles
+	  //fallback url template
+	  data.template = 'https://ecn.t{switch:0,1,2,3}.tiles.virtualearth.net/tiles/a{u}.jpeg?g=587&n=z';
+	  var bing = rendererBackgroundSource(data); //var key = 'Arzdiw4nlOJzRwOz__qailc8NiR31Tt51dN2D7cm57NrnceZnCpgOkmJhNpGoppU'; // P2, JOSM, etc
 
-	rendererBackgroundSource.Bing = function(data, dispatch) {
-	    // http://msdn.microsoft.com/en-us/library/ff701716.aspx
-	    // http://msdn.microsoft.com/en-us/library/ff701701.aspx
+	  var key = 'Ak5oTE46TUbjRp08OFVcGpkARErDobfpuyNKa-W2mQ8wbt1K1KL8p1bIRwWwcF-Q'; // iD
 
-	    data.template = 'https://ecn.t{switch:0,1,2,3}.tiles.virtualearth.net/tiles/a{u}.jpeg?g=587&mkt=en-gb&n=z';
+	  /*
+	  missing tile image strictness param (n=)
+	  •	n=f -> (Fail) returns a 404
+	  •	n=z -> (Empty) returns a 200 with 0 bytes (no content)
+	  •	n=t -> (Transparent) returns a 200 with a transparent (png) tile
+	  */
 
-	    var bing = rendererBackgroundSource(data);
-	    // var key = 'Arzdiw4nlOJzRwOz__qailc8NiR31Tt51dN2D7cm57NrnceZnCpgOkmJhNpGoppU'; // P2, JOSM, etc
-	    var key = 'Ak5oTE46TUbjRp08OFVcGpkARErDobfpuyNKa-W2mQ8wbt1K1KL8p1bIRwWwcF-Q';    // iD
+	  var strictParam = 'n';
+	  var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial?include=ImageryProviders&uriScheme=https&key=' + key;
+	  var cache = {};
+	  var inflight = {};
+	  var providers = [];
+	  d3_json(url).then(function (json) {
+	    var imageryResource = json.resourceSets[0].resources[0]; //retrieve and prepare up to date imagery template
 
+	    var template = imageryResource.imageUrl; //https://ecn.{subdomain}.tiles.virtualearth.net/tiles/a{quadkey}.jpeg?g=10339
 
-	    var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial?include=ImageryProviders&key=' + key;
-	    var cache = {};
-	    var inflight = {};
-	    var providers = [];
+	    var subDomains = imageryResource.imageUrlSubdomains; //["t0, t1, t2, t3"]
 
-	    d3_json(url)
-	        .then(function(json) {
-	            providers = json.resourceSets[0].resources[0].imageryProviders.map(function(provider) {
-	                return {
-	                    attribution: provider.attribution,
-	                    areas: provider.coverageAreas.map(function(area) {
-	                        return {
-	                            zoom: [area.zoomMin, area.zoomMax],
-	                            extent: geoExtent([area.bbox[1], area.bbox[0]], [area.bbox[3], area.bbox[2]])
-	                        };
-	                    })
-	                };
-	            });
-	            dispatch.call('change');
-	        })
-	        .catch(function() {
-	            /* ignore */
-	        });
+	    var subDomainNumbers = subDomains.map(function (subDomain) {
+	      return subDomain.substring(1);
+	    }).join(',');
+	    template = template.replace('{subdomain}', "t{switch:".concat(subDomainNumbers, "}")).replace('{quadkey}', '{u}');
 
+	    if (!new URLSearchParams(template).has(strictParam)) {
+	      template += "&".concat(strictParam, "=z");
+	    }
 
-	    bing.copyrightNotices = function(zoom, extent) {
-	        zoom = Math.min(zoom, 21);
-	        return providers.filter(function(provider) {
-	            return provider.areas.some(function(area) {
-	                return extent.intersects(area.extent) &&
-	                    area.zoom[0] <= zoom &&
-	                    area.zoom[1] >= zoom;
-	            });
-	        }).map(function(provider) {
-	            return provider.attribution;
-	        }).join(', ');
-	    };
+	    bing.template(template);
+	    providers = imageryResource.imageryProviders.map(function (provider) {
+	      return {
+	        attribution: provider.attribution,
+	        areas: provider.coverageAreas.map(function (area) {
+	          return {
+	            zoom: [area.zoomMin, area.zoomMax],
+	            extent: geoExtent([area.bbox[1], area.bbox[0]], [area.bbox[3], area.bbox[2]])
+	          };
+	        })
+	      };
+	    });
+	    dispatch.call('change');
+	  })["catch"](function () {
+	    /* ignore */
+	  });
 
+	  bing.copyrightNotices = function (zoom, extent) {
+	    zoom = Math.min(zoom, 21);
+	    return providers.filter(function (provider) {
+	      return provider.areas.some(function (area) {
+	        return extent.intersects(area.extent) && area.zoom[0] <= zoom && area.zoom[1] >= zoom;
+	      });
+	    }).map(function (provider) {
+	      return provider.attribution;
+	    }).join(', ');
+	  };
 
-	    bing.getMetadata = function(center, tileCoord, callback) {
-	        var tileID = tileCoord.slice(0, 3).join('/');
-	        var zoom = Math.min(tileCoord[2], 21);
-	        var centerPoint = center[1] + ',' + center[0];  // lat,lng
-	        var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial/' + centerPoint +
-	                '?zl=' + zoom + '&key=' + key;
+	  bing.getMetadata = function (center, tileCoord, callback) {
+	    var tileID = tileCoord.slice(0, 3).join('/');
+	    var zoom = Math.min(tileCoord[2], 21);
+	    var centerPoint = center[1] + ',' + center[0]; // lat,lng
 
-	        if (inflight[tileID]) { return; }
+	    var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial/' + centerPoint + '?zl=' + zoom + '&key=' + key;
+	    if (inflight[tileID]) return;
 
-	        if (!cache[tileID]) {
-	            cache[tileID] = {};
-	        }
-	        if (cache[tileID] && cache[tileID].metadata) {
-	            return callback(null, cache[tileID].metadata);
-	        }
+	    if (!cache[tileID]) {
+	      cache[tileID] = {};
+	    }
 
-	        inflight[tileID] = true;
-	        d3_json(url)
-	            .then(function(result) {
-	                delete inflight[tileID];
-	                if (!result) {
-	                    throw new Error('Unknown Error');
-	                }
-	                var vintage = {
-	                    start: localeDateString(result.resourceSets[0].resources[0].vintageStart),
-	                    end: localeDateString(result.resourceSets[0].resources[0].vintageEnd)
-	                };
-	                vintage.range = vintageRange(vintage);
-
-	                var metadata = { vintage: vintage };
-	                cache[tileID].metadata = metadata;
-	                if (callback) { callback(null, metadata); }
-	            })
-	            .catch(function(err) {
-	                delete inflight[tileID];
-	                if (callback) { callback(err.message); }
-	            });
-	    };
+	    if (cache[tileID] && cache[tileID].metadata) {
+	      return callback(null, cache[tileID].metadata);
+	    }
 
+	    inflight[tileID] = true;
+	    d3_json(url).then(function (result) {
+	      delete inflight[tileID];
 
-	    bing.terms_url = 'https://blog.openstreetmap.org/2010/11/30/microsoft-imagery-details';
+	      if (!result) {
+	        throw new Error('Unknown Error');
+	      }
 
+	      var vintage = {
+	        start: localeDateString(result.resourceSets[0].resources[0].vintageStart),
+	        end: localeDateString(result.resourceSets[0].resources[0].vintageEnd)
+	      };
+	      vintage.range = vintageRange(vintage);
+	      var metadata = {
+	        vintage: vintage
+	      };
+	      cache[tileID].metadata = metadata;
+	      if (callback) callback(null, metadata);
+	    })["catch"](function (err) {
+	      delete inflight[tileID];
+	      if (callback) callback(err.message);
+	    });
+	  };
 
-	    return bing;
+	  bing.terms_url = 'https://blog.openstreetmap.org/2010/11/30/microsoft-imagery-details';
+	  return bing;
 	};
 
+	rendererBackgroundSource.Esri = function (data) {
+	  // in addition to using the tilemap at zoom level 20, overzoom real tiles - #4327 (deprecated technique, but it works)
+	  if (data.template.match(/blankTile/) === null) {
+	    data.template = data.template + '?blankTile=false';
+	  }
 
+	  var esri = rendererBackgroundSource(data);
+	  var cache = {};
+	  var inflight = {};
 
-	rendererBackgroundSource.Esri = function(data) {
-	    // in addition to using the tilemap at zoom level 20, overzoom real tiles - #4327 (deprecated technique, but it works)
-	    if (data.template.match(/blankTile/) === null) {
-	        data.template = data.template + '?blankTile=false';
-	    }
-
-	    var esri = rendererBackgroundSource(data);
-	    var cache = {};
-	    var inflight = {};
-	    var _prevCenter;
-
-	    // use a tilemap service to set maximum zoom for esri tiles dynamically
-	    // https://developers.arcgis.com/documentation/tiled-elevation-service/
-	    esri.fetchTilemap = function(center) {
-	        // skip if we have already fetched a tilemap within 5km
-	        if (_prevCenter && geoSphericalDistance(center, _prevCenter) < 5000) { return; }
-	        _prevCenter = center;
-
-	        // tiles are available globally to zoom level 19, afterward they may or may not be present
-	        var z = 20;
+	  var _prevCenter; // use a tilemap service to set maximum zoom for esri tiles dynamically
+	  // https://developers.arcgis.com/documentation/tiled-elevation-service/
 
-	        // first generate a random url using the template
-	        var dummyUrl = esri.url([1,2,3]);
 
-	        // calculate url z/y/x from the lat/long of the center of the map
-	        var x = (Math.floor((center[0] + 180) / 360 * Math.pow(2, z)));
-	        var y = (Math.floor((1 - Math.log(Math.tan(center[1] * Math.PI / 180) + 1 / Math.cos(center[1] * Math.PI / 180)) / Math.PI) / 2 * Math.pow(2, z)));
+	  esri.fetchTilemap = function (center) {
+	    // skip if we have already fetched a tilemap within 5km
+	    if (_prevCenter && geoSphericalDistance(center, _prevCenter) < 5000) return;
+	    _prevCenter = center; // tiles are available globally to zoom level 19, afterward they may or may not be present
 
-	        // fetch an 8x8 grid to leverage cache
-	        var tilemapUrl = dummyUrl.replace(/tile\/[0-9]+\/[0-9]+\/[0-9]+\?blankTile=false/, 'tilemap') + '/' + z + '/' + y + '/' + x + '/8/8';
+	    var z = 20; // first generate a random url using the template
 
-	        // make the request and introspect the response from the tilemap server
-	        d3_json(tilemapUrl)
-	            .then(function(tilemap) {
-	                if (!tilemap) {
-	                    throw new Error('Unknown Error');
-	                }
-	                var hasTiles = true;
-	                for (var i = 0; i < tilemap.data.length; i++) {
-	                    // 0 means an individual tile in the grid doesn't exist
-	                    if (!tilemap.data[i]) {
-	                        hasTiles = false;
-	                        break;
-	                    }
-	                }
+	    var dummyUrl = esri.url([1, 2, 3]); // calculate url z/y/x from the lat/long of the center of the map
 
-	                // if any tiles are missing at level 20 we restrict maxZoom to 19
-	                esri.zoomExtent[1] = (hasTiles ? 22 : 19);
-	            })
-	            .catch(function() {
-	                /* ignore */
-	            });
-	    };
+	    var x = Math.floor((center[0] + 180) / 360 * Math.pow(2, z));
+	    var y = Math.floor((1 - Math.log(Math.tan(center[1] * Math.PI / 180) + 1 / Math.cos(center[1] * Math.PI / 180)) / Math.PI) / 2 * Math.pow(2, z)); // fetch an 8x8 grid to leverage cache
 
+	    var tilemapUrl = dummyUrl.replace(/tile\/[0-9]+\/[0-9]+\/[0-9]+\?blankTile=false/, 'tilemap') + '/' + z + '/' + y + '/' + x + '/8/8'; // make the request and introspect the response from the tilemap server
 
-	    esri.getMetadata = function(center, tileCoord, callback) {
-	        var tileID = tileCoord.slice(0, 3).join('/');
-	        var zoom = Math.min(tileCoord[2], esri.zoomExtent[1]);
-	        var centerPoint = center[0] + ',' + center[1];  // long, lat (as it should be)
-	        var unknown = _t('info_panels.background.unknown');
-	        var metadataLayer;
-	        var vintage = {};
-	        var metadata = {};
+	    d3_json(tilemapUrl).then(function (tilemap) {
+	      if (!tilemap) {
+	        throw new Error('Unknown Error');
+	      }
 
-	        if (inflight[tileID]) { return; }
+	      var hasTiles = true;
 
-	        switch (true) {
-	            case (zoom >= 20 && esri.id === 'EsriWorldImageryClarity'):
-	                metadataLayer = 4;
-	                break;
-	            case zoom >= 19:
-	                metadataLayer = 3;
-	                break;
-	            case zoom >= 17:
-	                metadataLayer = 2;
-	                break;
-	            case zoom >= 13:
-	                metadataLayer = 0;
-	                break;
-	            default:
-	                metadataLayer = 99;
+	      for (var i = 0; i < tilemap.data.length; i++) {
+	        // 0 means an individual tile in the grid doesn't exist
+	        if (!tilemap.data[i]) {
+	          hasTiles = false;
+	          break;
 	        }
+	      } // if any tiles are missing at level 20 we restrict maxZoom to 19
 
-	        var url;
-	        // build up query using the layer appropriate to the current zoom
-	        if (esri.id === 'EsriWorldImagery') {
-	            url = 'https://services.arcgisonline.com/arcgis/rest/services/World_Imagery/MapServer/';
-	        } else if (esri.id === 'EsriWorldImageryClarity') {
-	            url = 'https://serviceslab.arcgisonline.com/arcgis/rest/services/Clarity_World_Imagery/MapServer/';
-	        }
 
-	        url += metadataLayer + '/query?returnGeometry=false&geometry=' + centerPoint + '&inSR=4326&geometryType=esriGeometryPoint&outFields=*&f=json';
+	      esri.zoomExtent[1] = hasTiles ? 22 : 19;
+	    })["catch"](function () {
+	      /* ignore */
+	    });
+	  };
 
-	        if (!cache[tileID]) {
-	            cache[tileID] = {};
-	        }
-	        if (cache[tileID] && cache[tileID].metadata) {
-	            return callback(null, cache[tileID].metadata);
-	        }
+	  esri.getMetadata = function (center, tileCoord, callback) {
+	    var tileID = tileCoord.slice(0, 3).join('/');
+	    var zoom = Math.min(tileCoord[2], esri.zoomExtent[1]);
+	    var centerPoint = center[0] + ',' + center[1]; // long, lat (as it should be)
 
-	        // accurate metadata is only available >= 13
-	        if (metadataLayer === 99) {
-	            vintage = {
-	                start: null,
-	                end: null,
-	                range: null
-	            };
-	            metadata = {
-	                vintage: null,
-	                source: unknown,
-	                description: unknown,
-	                resolution: unknown,
-	                accuracy: unknown
-	            };
+	    var unknown = _t('info_panels.background.unknown');
+	    var metadataLayer;
+	    var vintage = {};
+	    var metadata = {};
+	    if (inflight[tileID]) return;
 
-	            callback(null, metadata);
+	    switch (true) {
+	      case zoom >= 20 && esri.id === 'EsriWorldImageryClarity':
+	        metadataLayer = 4;
+	        break;
 
-	        } else {
-	            inflight[tileID] = true;
-	            d3_json(url)
-	                .then(function(result) {
-	                    delete inflight[tileID];
-	                    if (!result) {
-	                        throw new Error('Unknown Error');
-	                    } else if (result.features && result.features.length < 1) {
-	                        throw new Error('No Results');
-	                    } else if (result.error && result.error.message) {
-	                        throw new Error(result.error.message);
-	                    }
+	      case zoom >= 19:
+	        metadataLayer = 3;
+	        break;
 
-	                    // pass through the discrete capture date from metadata
-	                    var captureDate = localeDateString(result.features[0].attributes.SRC_DATE2);
-	                    vintage = {
-	                        start: captureDate,
-	                        end: captureDate,
-	                        range: captureDate
-	                    };
-	                    metadata = {
-	                        vintage: vintage,
-	                        source: clean(result.features[0].attributes.NICE_NAME),
-	                        description: clean(result.features[0].attributes.NICE_DESC),
-	                        resolution: clean(+parseFloat(result.features[0].attributes.SRC_RES).toFixed(4)),
-	                        accuracy: clean(+parseFloat(result.features[0].attributes.SRC_ACC).toFixed(4))
-	                    };
-
-	                    // append units - meters
-	                    if (isFinite(metadata.resolution)) {
-	                        metadata.resolution += ' m';
-	                    }
-	                    if (isFinite(metadata.accuracy)) {
-	                        metadata.accuracy += ' m';
-	                    }
+	      case zoom >= 17:
+	        metadataLayer = 2;
+	        break;
 
-	                    cache[tileID].metadata = metadata;
-	                    if (callback) { callback(null, metadata); }
-	                })
-	                .catch(function(err) {
-	                    delete inflight[tileID];
-	                    if (callback) { callback(err.message); }
-	                });
-	        }
+	      case zoom >= 13:
+	        metadataLayer = 0;
+	        break;
 
+	      default:
+	        metadataLayer = 99;
+	    }
 
-	        function clean(val) {
-	            return String(val).trim() || unknown;
-	        }
-	    };
+	    var url; // build up query using the layer appropriate to the current zoom
 
-	    return esri;
-	};
+	    if (esri.id === 'EsriWorldImagery') {
+	      url = 'https://services.arcgisonline.com/arcgis/rest/services/World_Imagery/MapServer/';
+	    } else if (esri.id === 'EsriWorldImageryClarity') {
+	      url = 'https://serviceslab.arcgisonline.com/arcgis/rest/services/Clarity_World_Imagery/MapServer/';
+	    }
 
+	    url += metadataLayer + '/query?returnGeometry=false&geometry=' + centerPoint + '&inSR=4326&geometryType=esriGeometryPoint&outFields=*&f=json';
 
-	rendererBackgroundSource.None = function() {
-	    var source = rendererBackgroundSource({ id: 'none', template: '' });
+	    if (!cache[tileID]) {
+	      cache[tileID] = {};
+	    }
 
+	    if (cache[tileID] && cache[tileID].metadata) {
+	      return callback(null, cache[tileID].metadata);
+	    } // accurate metadata is only available >= 13
 
-	    source.name = function() {
-	        return _t('background.none');
-	    };
 
+	    if (metadataLayer === 99) {
+	      vintage = {
+	        start: null,
+	        end: null,
+	        range: null
+	      };
+	      metadata = {
+	        vintage: null,
+	        source: unknown,
+	        description: unknown,
+	        resolution: unknown,
+	        accuracy: unknown
+	      };
+	      callback(null, metadata);
+	    } else {
+	      inflight[tileID] = true;
+	      d3_json(url).then(function (result) {
+	        delete inflight[tileID];
+
+	        if (!result) {
+	          throw new Error('Unknown Error');
+	        } else if (result.features && result.features.length < 1) {
+	          throw new Error('No Results');
+	        } else if (result.error && result.error.message) {
+	          throw new Error(result.error.message);
+	        } // pass through the discrete capture date from metadata
+
+
+	        var captureDate = localeDateString(result.features[0].attributes.SRC_DATE2);
+	        vintage = {
+	          start: captureDate,
+	          end: captureDate,
+	          range: captureDate
+	        };
+	        metadata = {
+	          vintage: vintage,
+	          source: clean(result.features[0].attributes.NICE_NAME),
+	          description: clean(result.features[0].attributes.NICE_DESC),
+	          resolution: clean(+parseFloat(result.features[0].attributes.SRC_RES).toFixed(4)),
+	          accuracy: clean(+parseFloat(result.features[0].attributes.SRC_ACC).toFixed(4))
+	        }; // append units - meters
 
-	    source.imageryUsed = function() {
-	        return null;
-	    };
+	        if (isFinite(metadata.resolution)) {
+	          metadata.resolution += ' m';
+	        }
 
+	        if (isFinite(metadata.accuracy)) {
+	          metadata.accuracy += ' m';
+	        }
 
-	    source.area = function() {
-	        return -1;  // sources in background pane are sorted by area
-	    };
+	        cache[tileID].metadata = metadata;
+	        if (callback) callback(null, metadata);
+	      })["catch"](function (err) {
+	        delete inflight[tileID];
+	        if (callback) callback(err.message);
+	      });
+	    }
 
+	    function clean(val) {
+	      return String(val).trim() || unknown;
+	    }
+	  };
 
-	    return source;
+	  return esri;
 	};
 
+	rendererBackgroundSource.None = function () {
+	  var source = rendererBackgroundSource({
+	    id: 'none',
+	    template: ''
+	  });
 
-	rendererBackgroundSource.Custom = function(template) {
-	    var source = rendererBackgroundSource({ id: 'custom', template: template });
+	  source.name = function () {
+	    return _t('background.none');
+	  };
 
+	  source.label = function () {
+	    return _t.html('background.none');
+	  };
 
-	    source.name = function() {
-	        return _t('background.custom');
-	    };
+	  source.imageryUsed = function () {
+	    return null;
+	  };
 
+	  source.area = function () {
+	    return -1; // sources in background pane are sorted by area
+	  };
 
-	    source.imageryUsed = function() {
-	        // sanitize personal connection tokens - #6801
-	        var cleaned = source.template();
+	  return source;
+	};
 
-	        // from query string parameters
-	        if (cleaned.indexOf('?') !== -1) {
-	            var parts = cleaned.split('?', 2);
-	            var qs = utilStringQs(parts[1]);
+	rendererBackgroundSource.Custom = function (template) {
+	  var source = rendererBackgroundSource({
+	    id: 'custom',
+	    template: template
+	  });
 
-	            ['access_token', 'connectId', 'token'].forEach(function(param) {
-	                if (qs[param]) {
-	                    qs[param] = '{apikey}';
-	                }
-	            });
-	            cleaned = parts[0] + '?' + utilQsString(qs, true);  // true = soft encode
-	        }
+	  source.name = function () {
+	    return _t('background.custom');
+	  };
 
-	        // from wms/wmts api path parameters
-	        cleaned = cleaned.replace(/token\/(\w+)/, 'token/{apikey}');
+	  source.label = function () {
+	    return _t.html('background.custom');
+	  };
 
-	        return 'Custom (' + cleaned + ' )';
-	    };
+	  source.imageryUsed = function () {
+	    // sanitize personal connection tokens - #6801
+	    var cleaned = source.template(); // from query string parameters
 
+	    if (cleaned.indexOf('?') !== -1) {
+	      var parts = cleaned.split('?', 2);
+	      var qs = utilStringQs(parts[1]);
+	      ['access_token', 'connectId', 'token'].forEach(function (param) {
+	        if (qs[param]) {
+	          qs[param] = '{apikey}';
+	        }
+	      });
+	      cleaned = parts[0] + '?' + utilQsString(qs, true); // true = soft encode
+	    } // from wms/wmts api path parameters
 
-	    source.area = function() {
-	        return -2;  // sources in background pane are sorted by area
-	    };
 
+	    cleaned = cleaned.replace(/token\/(\w+)/, 'token/{apikey}');
+	    return 'Custom (' + cleaned + ' )';
+	  };
 
-	    return source;
+	  source.area = function () {
+	    return -2; // sources in background pane are sorted by area
+	  };
+
+	  return source;
 	};
 
 	function rendererTileLayer(context) {
-	    var transformProp = utilPrefixCSSProperty('Transform');
-	    var tiler = utilTiler();
-
-	    var _tileSize = 256;
-	    var _projection;
-	    var _cache = {};
-	    var _tileOrigin;
-	    var _zoom;
-	    var _source;
-
-
-	    function tileSizeAtZoom(d, z) {
-	        var EPSILON = 0.002;    // close seams
-	        return ((_tileSize * Math.pow(2, z - d[2])) / _tileSize) + EPSILON;
-	    }
-
-
-	    function atZoom(t, distance) {
-	        var power = Math.pow(2, distance);
-	        return [
-	            Math.floor(t[0] * power),
-	            Math.floor(t[1] * power),
-	            t[2] + distance
-	        ];
-	    }
-
-
-	    function lookUp(d) {
-	        for (var up = -1; up > -d[2]; up--) {
-	            var tile = atZoom(d, up);
-	            if (_cache[_source.url(tile)] !== false) {
-	                return tile;
-	            }
-	        }
-	    }
+	  var transformProp = utilPrefixCSSProperty('Transform');
+	  var tiler = utilTiler();
+	  var _tileSize = 256;
 
+	  var _projection;
 
-	    function uniqueBy(a, n) {
-	        var o = [];
-	        var seen = {};
-	        for (var i = 0; i < a.length; i++) {
-	            if (seen[a[i][n]] === undefined) {
-	                o.push(a[i]);
-	                seen[a[i][n]] = true;
-	            }
-	        }
-	        return o;
-	    }
-
+	  var _cache = {};
 
-	    function addSource(d) {
-	        d.push(_source.url(d));
-	        return d;
-	    }
+	  var _tileOrigin;
 
+	  var _zoom;
 
-	    // Update tiles based on current state of `projection`.
-	    function background(selection) {
-	        _zoom = geoScaleToZoom(_projection.scale(), _tileSize);
+	  var _source;
 
-	        var pixelOffset;
-	        if (_source) {
-	            pixelOffset = [
-	                _source.offset()[0] * Math.pow(2, _zoom),
-	                _source.offset()[1] * Math.pow(2, _zoom)
-	            ];
-	        } else {
-	            pixelOffset = [0, 0];
-	        }
+	  function tileSizeAtZoom(d, z) {
+	    var EPSILON = 0.002; // close seams
 
-	        var translate = [
-	            _projection.translate()[0] + pixelOffset[0],
-	            _projection.translate()[1] + pixelOffset[1]
-	        ];
+	    return _tileSize * Math.pow(2, z - d[2]) / _tileSize + EPSILON;
+	  }
 
-	        tiler
-	            .scale(_projection.scale() * 2 * Math.PI)
-	            .translate(translate);
+	  function atZoom(t, distance) {
+	    var power = Math.pow(2, distance);
+	    return [Math.floor(t[0] * power), Math.floor(t[1] * power), t[2] + distance];
+	  }
 
-	        _tileOrigin = [
-	            _projection.scale() * Math.PI - translate[0],
-	            _projection.scale() * Math.PI - translate[1]
-	        ];
+	  function lookUp(d) {
+	    for (var up = -1; up > -d[2]; up--) {
+	      var tile = atZoom(d, up);
 
-	        render(selection);
+	      if (_cache[_source.url(tile)] !== false) {
+	        return tile;
+	      }
 	    }
+	  }
 
+	  function uniqueBy(a, n) {
+	    var o = [];
+	    var seen = {};
 
-	    // Derive the tiles onscreen, remove those offscreen and position them.
-	    // Important that this part not depend on `_projection` because it's
-	    // rentered when tiles load/error (see #644).
-	    function render(selection) {
-	        if (!_source) { return; }
-	        var requests = [];
-	        var showDebug = context.getDebug('tile') && !_source.overlay;
+	    for (var i = 0; i < a.length; i++) {
+	      if (seen[a[i][n]] === undefined) {
+	        o.push(a[i]);
+	        seen[a[i][n]] = true;
+	      }
+	    }
 
-	        if (_source.validZoom(_zoom)) {
-	            tiler.skipNullIsland(!!_source.overlay);
+	    return o;
+	  }
 
-	            tiler().forEach(function(d) {
-	                addSource(d);
-	                if (d[3] === '') { return; }
-	                if (typeof d[3] !== 'string') { return; } // Workaround for #2295
-	                requests.push(d);
-	                if (_cache[d[3]] === false && lookUp(d)) {
-	                    requests.push(addSource(lookUp(d)));
-	                }
-	            });
+	  function addSource(d) {
+	    d.push(_source.url(d));
+	    return d;
+	  } // Update tiles based on current state of `projection`.
 
-	            requests = uniqueBy(requests, 3).filter(function(r) {
-	                // don't re-request tiles which have failed in the past
-	                return _cache[r[3]] !== false;
-	            });
-	        }
 
-	        function load(d) {
-	            _cache[d[3]] = true;
-	            select(this)
-	                .on('error', null)
-	                .on('load', null)
-	                .classed('tile-loaded', true);
-	            render(selection);
-	        }
+	  function background(selection) {
+	    _zoom = geoScaleToZoom(_projection.scale(), _tileSize);
+	    var pixelOffset;
 
-	        function error(d) {
-	            _cache[d[3]] = false;
-	            select(this)
-	                .on('error', null)
-	                .on('load', null)
-	                .remove();
-	            render(selection);
-	        }
+	    if (_source) {
+	      pixelOffset = [_source.offset()[0] * Math.pow(2, _zoom), _source.offset()[1] * Math.pow(2, _zoom)];
+	    } else {
+	      pixelOffset = [0, 0];
+	    }
 
-	        function imageTransform(d) {
-	            var ts = _tileSize * Math.pow(2, _zoom - d[2]);
-	            var scale = tileSizeAtZoom(d, _zoom);
-	            return 'translate(' +
-	                ((d[0] * ts) - _tileOrigin[0]) + 'px,' +
-	                ((d[1] * ts) - _tileOrigin[1]) + 'px) ' +
-	                'scale(' + scale + ',' + scale + ')';
-	        }
+	    var translate = [_projection.translate()[0] + pixelOffset[0], _projection.translate()[1] + pixelOffset[1]];
+	    tiler.scale(_projection.scale() * 2 * Math.PI).translate(translate);
+	    _tileOrigin = [_projection.scale() * Math.PI - translate[0], _projection.scale() * Math.PI - translate[1]];
+	    render(selection);
+	  } // Derive the tiles onscreen, remove those offscreen and position them.
+	  // Important that this part not depend on `_projection` because it's
+	  // rentered when tiles load/error (see #644).
 
-	        function tileCenter(d) {
-	            var ts = _tileSize * Math.pow(2, _zoom - d[2]);
-	            return [
-	                ((d[0] * ts) - _tileOrigin[0] + (ts / 2)),
-	                ((d[1] * ts) - _tileOrigin[1] + (ts / 2))
-	            ];
-	        }
 
-	        function debugTransform(d) {
-	            var coord = tileCenter(d);
-	            return 'translate(' + coord[0] + 'px,' + coord[1] + 'px)';
-	        }
+	  function render(selection) {
+	    if (!_source) return;
+	    var requests = [];
+	    var showDebug = context.getDebug('tile') && !_source.overlay;
 
+	    if (_source.validZoom(_zoom)) {
+	      tiler.skipNullIsland(!!_source.overlay);
+	      tiler().forEach(function (d) {
+	        addSource(d);
+	        if (d[3] === '') return;
+	        if (typeof d[3] !== 'string') return; // Workaround for #2295
 
-	        // Pick a representative tile near the center of the viewport
-	        // (This is useful for sampling the imagery vintage)
-	        var dims = tiler.size();
-	        var mapCenter = [dims[0] / 2, dims[1] / 2];
-	        var minDist = Math.max(dims[0], dims[1]);
-	        var nearCenter;
+	        requests.push(d);
 
-	        requests.forEach(function(d) {
-	            var c = tileCenter(d);
-	            var dist = geoVecLength(c, mapCenter);
-	            if (dist < minDist) {
-	                minDist = dist;
-	                nearCenter = d;
-	            }
-	        });
+	        if (_cache[d[3]] === false && lookUp(d)) {
+	          requests.push(addSource(lookUp(d)));
+	        }
+	      });
+	      requests = uniqueBy(requests, 3).filter(function (r) {
+	        // don't re-request tiles which have failed in the past
+	        return _cache[r[3]] !== false;
+	      });
+	    }
 
+	    function load(d3_event, d) {
+	      _cache[d[3]] = true;
+	      select(this).on('error', null).on('load', null).classed('tile-loaded', true);
+	      render(selection);
+	    }
 
-	        var image = selection.selectAll('img')
-	            .data(requests, function(d) { return d[3]; });
+	    function error(d3_event, d) {
+	      _cache[d[3]] = false;
+	      select(this).on('error', null).on('load', null).remove();
+	      render(selection);
+	    }
 
-	        image.exit()
-	            .style(transformProp, imageTransform)
-	            .classed('tile-removing', true)
-	            .classed('tile-center', false)
-	            .each(function() {
-	                var tile = select(this);
-	                window.setTimeout(function() {
-	                    if (tile.classed('tile-removing')) {
-	                        tile.remove();
-	                    }
-	                }, 300);
-	            });
+	    function imageTransform(d) {
+	      var ts = _tileSize * Math.pow(2, _zoom - d[2]);
 
-	        image.enter()
-	          .append('img')
-	            .attr('class', 'tile')
-	            .attr('draggable', 'false')
-	            .style('width', _tileSize + 'px')
-	            .style('height', _tileSize + 'px')
-	            .attr('src', function(d) { return d[3]; })
-	            .on('error', error)
-	            .on('load', load)
-	          .merge(image)
-	            .style(transformProp, imageTransform)
-	            .classed('tile-debug', showDebug)
-	            .classed('tile-removing', false)
-	            .classed('tile-center', function(d) { return d === nearCenter; });
-
-
-
-	        var debug = selection.selectAll('.tile-label-debug')
-	            .data(showDebug ? requests : [], function(d) { return d[3]; });
-
-	        debug.exit()
-	            .remove();
-
-	        if (showDebug) {
-	            var debugEnter = debug.enter()
-	                .append('div')
-	                .attr('class', 'tile-label-debug');
-
-	            debugEnter
-	                .append('div')
-	                .attr('class', 'tile-label-debug-coord');
-
-	            debugEnter
-	                .append('div')
-	                .attr('class', 'tile-label-debug-vintage');
-
-	            debug = debug.merge(debugEnter);
-
-	            debug
-	                .style(transformProp, debugTransform);
-
-	            debug
-	                .selectAll('.tile-label-debug-coord')
-	                .text(function(d) { return d[2] + ' / ' + d[0] + ' / ' + d[1]; });
-
-	            debug
-	                .selectAll('.tile-label-debug-vintage')
-	                .each(function(d) {
-	                    var span = select(this);
-	                    var center = context.projection.invert(tileCenter(d));
-	                    _source.getMetadata(center, d, function(err, result) {
-	                        span.text((result && result.vintage && result.vintage.range) ||
-	                            _t('info_panels.background.vintage') + ': ' + _t('info_panels.background.unknown')
-	                        );
-	                    });
-	                });
-	        }
+	      var scale = tileSizeAtZoom(d, _zoom);
+	      return 'translate(' + (d[0] * ts - _tileOrigin[0]) + 'px,' + (d[1] * ts - _tileOrigin[1]) + 'px) ' + 'scale(' + scale + ',' + scale + ')';
+	    }
 
+	    function tileCenter(d) {
+	      var ts = _tileSize * Math.pow(2, _zoom - d[2]);
+
+	      return [d[0] * ts - _tileOrigin[0] + ts / 2, d[1] * ts - _tileOrigin[1] + ts / 2];
 	    }
 
+	    function debugTransform(d) {
+	      var coord = tileCenter(d);
+	      return 'translate(' + coord[0] + 'px,' + coord[1] + 'px)';
+	    } // Pick a representative tile near the center of the viewport
+	    // (This is useful for sampling the imagery vintage)
 
-	    background.projection = function(val) {
-	        if (!arguments.length) { return _projection; }
-	        _projection = val;
-	        return background;
-	    };
 
+	    var dims = tiler.size();
+	    var mapCenter = [dims[0] / 2, dims[1] / 2];
+	    var minDist = Math.max(dims[0], dims[1]);
+	    var nearCenter;
+	    requests.forEach(function (d) {
+	      var c = tileCenter(d);
+	      var dist = geoVecLength(c, mapCenter);
 
-	    background.dimensions = function(val) {
-	        if (!arguments.length) { return tiler.size(); }
-	        tiler.size(val);
-	        return background;
-	    };
+	      if (dist < minDist) {
+	        minDist = dist;
+	        nearCenter = d;
+	      }
+	    });
+	    var image = selection.selectAll('img').data(requests, function (d) {
+	      return d[3];
+	    });
+	    image.exit().style(transformProp, imageTransform).classed('tile-removing', true).classed('tile-center', false).each(function () {
+	      var tile = select(this);
+	      window.setTimeout(function () {
+	        if (tile.classed('tile-removing')) {
+	          tile.remove();
+	        }
+	      }, 300);
+	    });
+	    image.enter().append('img').attr('class', 'tile').attr('draggable', 'false').style('width', _tileSize + 'px').style('height', _tileSize + 'px').attr('src', function (d) {
+	      return d[3];
+	    }).on('error', error).on('load', load).merge(image).style(transformProp, imageTransform).classed('tile-debug', showDebug).classed('tile-removing', false).classed('tile-center', function (d) {
+	      return d === nearCenter;
+	    });
+	    var debug = selection.selectAll('.tile-label-debug').data(showDebug ? requests : [], function (d) {
+	      return d[3];
+	    });
+	    debug.exit().remove();
+
+	    if (showDebug) {
+	      var debugEnter = debug.enter().append('div').attr('class', 'tile-label-debug');
+	      debugEnter.append('div').attr('class', 'tile-label-debug-coord');
+	      debugEnter.append('div').attr('class', 'tile-label-debug-vintage');
+	      debug = debug.merge(debugEnter);
+	      debug.style(transformProp, debugTransform);
+	      debug.selectAll('.tile-label-debug-coord').html(function (d) {
+	        return d[2] + ' / ' + d[0] + ' / ' + d[1];
+	      });
+	      debug.selectAll('.tile-label-debug-vintage').each(function (d) {
+	        var span = select(this);
+	        var center = context.projection.invert(tileCenter(d));
 
+	        _source.getMetadata(center, d, function (err, result) {
+	          span.html(result && result.vintage && result.vintage.range || _t('info_panels.background.vintage') + ': ' + _t('info_panels.background.unknown'));
+	        });
+	      });
+	    }
+	  }
 
-	    background.source = function(val) {
-	        if (!arguments.length) { return _source; }
-	        _source = val;
-	        _tileSize = _source.tileSize;
-	        _cache = {};
-	        tiler.tileSize(_source.tileSize).zoomExtent(_source.zoomExtent);
-	        return background;
-	    };
+	  background.projection = function (val) {
+	    if (!arguments.length) return _projection;
+	    _projection = val;
+	    return background;
+	  };
 
+	  background.dimensions = function (val) {
+	    if (!arguments.length) return tiler.size();
+	    tiler.size(val);
+	    return background;
+	  };
 
+	  background.source = function (val) {
+	    if (!arguments.length) return _source;
+	    _source = val;
+	    _tileSize = _source.tileSize;
+	    _cache = {};
+	    tiler.tileSize(_source.tileSize).zoomExtent(_source.zoomExtent);
 	    return background;
+	  };
+
+	  return background;
 	}
 
 	var _imageryIndex = null;
-
 	function rendererBackground(context) {
-	  var dispatch$1 = dispatch('change');
+	  var dispatch = dispatch$8('change');
 	  var detected = utilDetect();
 	  var baseLayer = rendererTileLayer(context).projection(context.projection);
 	  var _isValid = true;
@@ -63235,111 +61322,111 @@
 	  var _saturation = 1;
 	  var _sharpness = 1;
 
-
 	  function ensureImageryIndex() {
-	    return _mainFileFetcher.get('imagery')
-	      .then(function (sources) {
-	        if (_imageryIndex) { return _imageryIndex; }
-
-	        _imageryIndex = {
-	          imagery: sources,
-	          features: {}
+	    return _mainFileFetcher.get('imagery').then(function (sources) {
+	      if (_imageryIndex) return _imageryIndex;
+	      _imageryIndex = {
+	        imagery: sources,
+	        features: {}
+	      }; // use which-polygon to support efficient index and querying for imagery
+
+	      var features = sources.map(function (source) {
+	        if (!source.polygon) return null; // workaround for editor-layer-index weirdness..
+	        // Add an extra array nest to each element in `source.polygon`
+	        // so the rings are not treated as a bunch of holes:
+	        // what we have: [ [[outer],[hole],[hole]] ]
+	        // what we want: [ [[outer]],[[outer]],[[outer]] ]
+
+	        var rings = source.polygon.map(function (ring) {
+	          return [ring];
+	        });
+	        var feature = {
+	          type: 'Feature',
+	          properties: {
+	            id: source.id
+	          },
+	          geometry: {
+	            type: 'MultiPolygon',
+	            coordinates: rings
+	          }
 	        };
+	        _imageryIndex.features[source.id] = feature;
+	        return feature;
+	      }).filter(Boolean);
+	      _imageryIndex.query = whichPolygon_1({
+	        type: 'FeatureCollection',
+	        features: features
+	      }); // Instantiate `rendererBackgroundSource` objects for each source
+
+	      _imageryIndex.backgrounds = sources.map(function (source) {
+	        if (source.type === 'bing') {
+	          return rendererBackgroundSource.Bing(source, dispatch);
+	        } else if (/^EsriWorldImagery/.test(source.id)) {
+	          return rendererBackgroundSource.Esri(source);
+	        } else {
+	          return rendererBackgroundSource(source);
+	        }
+	      }); // Add 'None'
 
-	        // use which-polygon to support efficient index and querying for imagery
-	        var features = sources.map(function (source) {
-	          if (!source.polygon) { return null; }
-	          // workaround for editor-layer-index weirdness..
-	          // Add an extra array nest to each element in `source.polygon`
-	          // so the rings are not treated as a bunch of holes:
-	          // what we have: [ [[outer],[hole],[hole]] ]
-	          // what we want: [ [[outer]],[[outer]],[[outer]] ]
-	          var rings = source.polygon.map(function (ring) { return [ring]; });
-
-	          var feature = {
-	            type: 'Feature',
-	            properties: { id: source.id },
-	            geometry: { type: 'MultiPolygon', coordinates: rings }
-	          };
-
-	          _imageryIndex.features[source.id] = feature;
-	          return feature;
-
-	        }).filter(Boolean);
-
-	        _imageryIndex.query = whichPolygon_1({ type: 'FeatureCollection', features: features });
-
+	      _imageryIndex.backgrounds.unshift(rendererBackgroundSource.None()); // Add 'Custom'
 
-	        // Instantiate `rendererBackgroundSource` objects for each source
-	        _imageryIndex.backgrounds = sources.map(function (source) {
-	          if (source.type === 'bing') {
-	            return rendererBackgroundSource.Bing(source, dispatch$1);
-	          } else if (/^EsriWorldImagery/.test(source.id)) {
-	            return rendererBackgroundSource.Esri(source);
-	          } else {
-	            return rendererBackgroundSource(source);
-	          }
-	        });
 
-	        // Add 'None'
-	        _imageryIndex.backgrounds.unshift(rendererBackgroundSource.None());
+	      var template = corePreferences('background-custom-template') || '';
+	      var custom = rendererBackgroundSource.Custom(template);
 
-	        // Add 'Custom'
-	        var template = corePreferences('background-custom-template') || '';
-	        var custom = rendererBackgroundSource.Custom(template);
-	        _imageryIndex.backgrounds.unshift(custom);
+	      _imageryIndex.backgrounds.unshift(custom);
 
-	        return _imageryIndex;
-	      });
+	      return _imageryIndex;
+	    });
 	  }
 
-
 	  function background(selection) {
-	    var currSource = baseLayer.source();
-
-	    // If we are displaying an Esri basemap at high zoom,
+	    var currSource = baseLayer.source(); // If we are displaying an Esri basemap at high zoom,
 	    // check its tilemap to see how high the zoom can go
+
 	    if (context.map().zoom() > 18) {
 	      if (currSource && /^EsriWorldImagery/.test(currSource.id)) {
 	        var center = context.map().center();
 	        currSource.fetchTilemap(center);
 	      }
-	    }
+	    } // Is the imagery valid here? - #4827
+
 
-	    // Is the imagery valid here? - #4827
 	    var sources = background.sources(context.map().extent());
 	    var wasValid = _isValid;
-	    _isValid = !!sources.filter(function (d) { return d === currSource; }).length;
+	    _isValid = !!sources.filter(function (d) {
+	      return d === currSource;
+	    }).length;
 
-	    if (wasValid !== _isValid) {      // change in valid status
+	    if (wasValid !== _isValid) {
+	      // change in valid status
 	      background.updateImagery();
 	    }
 
-
 	    var baseFilter = '';
+
 	    if (detected.cssfilters) {
 	      if (_brightness !== 1) {
-	        baseFilter += " brightness(" + _brightness + ")";
+	        baseFilter += " brightness(".concat(_brightness, ")");
 	      }
+
 	      if (_contrast !== 1) {
-	        baseFilter += " contrast(" + _contrast + ")";
+	        baseFilter += " contrast(".concat(_contrast, ")");
 	      }
+
 	      if (_saturation !== 1) {
-	        baseFilter += " saturate(" + _saturation + ")";
+	        baseFilter += " saturate(".concat(_saturation, ")");
 	      }
-	      if (_sharpness < 1) {  // gaussian blur
+
+	      if (_sharpness < 1) {
+	        // gaussian blur
 	        var blur = d3_interpolateNumber(0.5, 5)(1 - _sharpness);
-	        baseFilter += " blur(" + blur + "px)";
+	        baseFilter += " blur(".concat(blur, "px)");
 	      }
 	    }
 
-	    var base = selection.selectAll('.layer-background')
-	      .data([0]);
-
-	    base = base.enter()
-	      .insert('div', '.layer-data')
-	      .attr('class', 'layer layer-background')
-	      .merge(base);
+	    var base = selection.selectAll('.layer-background').data([0]);
+	    base = base.enter().insert('div', '.layer-data').attr('class', 'layer layer-background').merge(base);
 
 	    if (detected.cssfilters) {
 	      base.style('filter', baseFilter || null);
@@ -63347,77 +61434,52 @@
 	      base.style('opacity', _brightness);
 	    }
 
-
-	    var imagery = base.selectAll('.layer-imagery')
-	      .data([0]);
-
-	    imagery.enter()
-	      .append('div')
-	      .attr('class', 'layer layer-imagery')
-	      .merge(imagery)
-	      .call(baseLayer);
-
-
+	    var imagery = base.selectAll('.layer-imagery').data([0]);
+	    imagery.enter().append('div').attr('class', 'layer layer-imagery').merge(imagery).call(baseLayer);
 	    var maskFilter = '';
 	    var mixBlendMode = '';
-	    if (detected.cssfilters && _sharpness > 1) {  // apply unsharp mask
+
+	    if (detected.cssfilters && _sharpness > 1) {
+	      // apply unsharp mask
 	      mixBlendMode = 'overlay';
 	      maskFilter = 'saturate(0) blur(3px) invert(1)';
-
 	      var contrast = _sharpness - 1;
-	      maskFilter += " contrast(" + contrast + ")";
-
+	      maskFilter += " contrast(".concat(contrast, ")");
 	      var brightness = d3_interpolateNumber(1, 0.85)(_sharpness - 1);
-	      maskFilter += " brightness(" + brightness + ")";
+	      maskFilter += " brightness(".concat(brightness, ")");
 	    }
 
-	    var mask = base.selectAll('.layer-unsharp-mask')
-	      .data(detected.cssfilters && _sharpness > 1 ? [0] : []);
-
-	    mask.exit()
-	      .remove();
-
-	    mask.enter()
-	      .append('div')
-	      .attr('class', 'layer layer-mask layer-unsharp-mask')
-	      .merge(mask)
-	      .call(baseLayer)
-	      .style('filter', maskFilter || null)
-	      .style('mix-blend-mode', mixBlendMode || null);
-
-
-	    var overlays = selection.selectAll('.layer-overlay')
-	      .data(_overlayLayers, function (d) { return d.source().name(); });
-
-	    overlays.exit()
-	      .remove();
-
-	    overlays.enter()
-	      .insert('div', '.layer-data')
-	      .attr('class', 'layer layer-overlay')
-	      .merge(overlays)
-	      .each(function (layer, i, nodes) { return select(nodes[i]).call(layer); });
+	    var mask = base.selectAll('.layer-unsharp-mask').data(detected.cssfilters && _sharpness > 1 ? [0] : []);
+	    mask.exit().remove();
+	    mask.enter().append('div').attr('class', 'layer layer-mask layer-unsharp-mask').merge(mask).call(baseLayer).style('filter', maskFilter || null).style('mix-blend-mode', mixBlendMode || null);
+	    var overlays = selection.selectAll('.layer-overlay').data(_overlayLayers, function (d) {
+	      return d.source().name();
+	    });
+	    overlays.exit().remove();
+	    overlays.enter().insert('div', '.layer-data').attr('class', 'layer layer-overlay').merge(overlays).each(function (layer, i, nodes) {
+	      return select(nodes[i]).call(layer);
+	    });
 	  }
 
-
-	  background.updateImagery = function() {
+	  background.updateImagery = function () {
 	    var currSource = baseLayer.source();
-	    if (context.inIntro() || !currSource) { return; }
+	    if (context.inIntro() || !currSource) return;
 
-	    var o = _overlayLayers
-	      .filter(function (d) { return !d.source().isLocatorOverlay() && !d.source().isHidden(); })
-	      .map(function (d) { return d.source().id; })
-	      .join(',');
+	    var o = _overlayLayers.filter(function (d) {
+	      return !d.source().isLocatorOverlay() && !d.source().isHidden();
+	    }).map(function (d) {
+	      return d.source().id;
+	    }).join(',');
 
 	    var meters = geoOffsetToMeters(currSource.offset());
 	    var EPSILON = 0.01;
 	    var x = +meters[0].toFixed(2);
 	    var y = +meters[1].toFixed(2);
 	    var hash = utilStringQs(window.location.hash);
-
 	    var id = currSource.id;
+
 	    if (id === 'custom') {
-	      id = "custom:" + (currSource.template());
+	      id = "custom:".concat(currSource.template());
 	    }
 
 	    if (id) {
@@ -63433,7 +61495,7 @@
 	    }
 
 	    if (Math.abs(x) > EPSILON || Math.abs(y) > EPSILON) {
-	      hash.offset = x + "," + y;
+	      hash.offset = "".concat(x, ",").concat(y);
 	    } else {
 	      delete hash.offset;
 	    }
@@ -63444,17 +61506,20 @@
 
 	    var imageryUsed = [];
 	    var photoOverlaysUsed = [];
-
 	    var currUsed = currSource.imageryUsed();
+
 	    if (currUsed && _isValid) {
 	      imageryUsed.push(currUsed);
 	    }
 
-	    _overlayLayers
-	      .filter(function (d) { return !d.source().isLocatorOverlay() && !d.source().isHidden(); })
-	      .forEach(function (d) { return imageryUsed.push(d.source().imageryUsed()); });
+	    _overlayLayers.filter(function (d) {
+	      return !d.source().isLocatorOverlay() && !d.source().isHidden();
+	    }).forEach(function (d) {
+	      return imageryUsed.push(d.source().imageryUsed());
+	    });
 
 	    var dataLayer = context.layers().layer('data');
+
 	    if (dataLayer && dataLayer.enabled() && dataLayer.hasData()) {
 	      imageryUsed.push(dataLayer.getSrc());
 	    }
@@ -63469,6 +61534,7 @@
 
 	    for (var layerID in photoOverlayLayers) {
 	      var layer = context.layers().layer(layerID);
+
 	      if (layer && layer.enabled()) {
 	        photoOverlaysUsed.push(layerID);
 	        imageryUsed.push(photoOverlayLayers[layerID]);
@@ -63482,50 +61548,53 @@
 	  var _checkedBlocklists;
 
 	  background.sources = function (extent, zoom, includeCurrent) {
-	    if (!_imageryIndex) { return []; }   // called before init()?
+	    if (!_imageryIndex) return []; // called before init()?
 
 	    var visible = {};
-	    (_imageryIndex.query.bbox(extent.rectangle(), true) || [])
-	      .forEach(function (d) { return visible[d.id] = true; });
-
+	    (_imageryIndex.query.bbox(extent.rectangle(), true) || []).forEach(function (d) {
+	      return visible[d.id] = true;
+	    });
 	    var currSource = baseLayer.source();
-
 	    var osm = context.connection();
 	    var blocklists = osm && osm.imageryBlocklists();
 
 	    if (blocklists && blocklists !== _checkedBlocklists) {
 	      _imageryIndex.backgrounds.forEach(function (source) {
-	        source.isBlocked = blocklists.some(function(blocklist) {
+	        source.isBlocked = blocklists.some(function (blocklist) {
 	          return blocklist.test(source.template());
 	        });
 	      });
+
 	      _checkedBlocklists = blocklists;
 	    }
 
 	    return _imageryIndex.backgrounds.filter(function (source) {
-	      if (includeCurrent && currSource === source) { return true; }  // optionally always include the current imagery
-	      if (source.isBlocked) { return false; }                        // even bundled sources may be blocked - #7905
-	      if (!source.polygon) { return true; }                          // always include imagery with worldwide coverage
-	      if (zoom && zoom < 6) { return false; }                        // optionally exclude local imagery at low zooms
-	      return visible[source.id];                                 // include imagery visible in given extent
+	      if (includeCurrent && currSource === source) return true; // optionally always include the current imagery
+
+	      if (source.isBlocked) return false; // even bundled sources may be blocked - #7905
+
+	      if (!source.polygon) return true; // always include imagery with worldwide coverage
+
+	      if (zoom && zoom < 6) return false; // optionally exclude local imagery at low zooms
+
+	      return visible[source.id]; // include imagery visible in given extent
 	    });
 	  };
 
-
 	  background.dimensions = function (val) {
-	    if (!val) { return; }
+	    if (!val) return;
 	    baseLayer.dimensions(val);
-	    _overlayLayers.forEach(function (layer) { return layer.dimensions(val); });
-	  };
 
+	    _overlayLayers.forEach(function (layer) {
+	      return layer.dimensions(val);
+	    });
+	  };
 
-	  background.baseLayerSource = function(d) {
-	    if (!arguments.length) { return baseLayer.source(); }
+	  background.baseLayerSource = function (d) {
+	    if (!arguments.length) return baseLayer.source(); // test source against OSM imagery blocklists..
 
-	    // test source against OSM imagery blocklists..
 	    var osm = context.connection();
-	    if (!osm) { return background; }
-
+	    if (!osm) return background;
 	    var blocklists = osm.imageryBlocklists();
 	    var template = d.template();
 	    var fail = false;
@@ -63536,4983 +61605,3165 @@
 	      regex = blocklists[i];
 	      fail = regex.test(template);
 	      tested++;
-	      if (fail) { break; }
-	    }
+	      if (fail) break;
+	    } // ensure at least one test was run.
+
 
-	    // ensure at least one test was run.
 	    if (!tested) {
 	      regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
 	      fail = regex.test(template);
 	    }
 
 	    baseLayer.source(!fail ? d : background.findSource('none'));
-	    dispatch$1.call('change');
+	    dispatch.call('change');
 	    background.updateImagery();
 	    return background;
 	  };
 
-
 	  background.findSource = function (id) {
-	    if (!id || !_imageryIndex) { return null; }   // called before init()?
-	    return _imageryIndex.backgrounds.find(function (d) { return d.id && d.id === id; });
-	  };
+	    if (!id || !_imageryIndex) return null; // called before init()?
 
+	    return _imageryIndex.backgrounds.find(function (d) {
+	      return d.id && d.id === id;
+	    });
+	  };
 
 	  background.bing = function () {
 	    background.baseLayerSource(background.findSource('Bing'));
 	  };
 
-
 	  background.showsLayer = function (d) {
 	    var currSource = baseLayer.source();
-	    if (!d || !currSource) { return false; }
-	    return d.id === currSource.id || _overlayLayers.some(function (layer) { return d.id === layer.source().id; });
+	    if (!d || !currSource) return false;
+	    return d.id === currSource.id || _overlayLayers.some(function (layer) {
+	      return d.id === layer.source().id;
+	    });
 	  };
 
-
 	  background.overlayLayerSources = function () {
-	    return _overlayLayers.map(function (layer) { return layer.source(); });
+	    return _overlayLayers.map(function (layer) {
+	      return layer.source();
+	    });
 	  };
 
-
 	  background.toggleOverlayLayer = function (d) {
 	    var layer;
+
 	    for (var i = 0; i < _overlayLayers.length; i++) {
 	      layer = _overlayLayers[i];
+
 	      if (layer.source() === d) {
 	        _overlayLayers.splice(i, 1);
-	        dispatch$1.call('change');
+
+	        dispatch.call('change');
 	        background.updateImagery();
 	        return;
 	      }
 	    }
 
-	    layer = rendererTileLayer(context)
-	      .source(d)
-	      .projection(context.projection)
-	      .dimensions(baseLayer.dimensions()
-	    );
+	    layer = rendererTileLayer(context).source(d).projection(context.projection).dimensions(baseLayer.dimensions());
 
 	    _overlayLayers.push(layer);
-	    dispatch$1.call('change');
+
+	    dispatch.call('change');
 	    background.updateImagery();
 	  };
 
-
 	  background.nudge = function (d, zoom) {
 	    var currSource = baseLayer.source();
+
 	    if (currSource) {
 	      currSource.nudge(d, zoom);
-	      dispatch$1.call('change');
+	      dispatch.call('change');
 	      background.updateImagery();
 	    }
+
 	    return background;
 	  };
 
-
-	  background.offset = function(d) {
+	  background.offset = function (d) {
 	    var currSource = baseLayer.source();
+
 	    if (!arguments.length) {
-	      return (currSource && currSource.offset()) || [0, 0];
+	      return currSource && currSource.offset() || [0, 0];
 	    }
+
 	    if (currSource) {
 	      currSource.offset(d);
-	      dispatch$1.call('change');
+	      dispatch.call('change');
 	      background.updateImagery();
 	    }
+
 	    return background;
 	  };
 
-
-	  background.brightness = function(d) {
-	    if (!arguments.length) { return _brightness; }
+	  background.brightness = function (d) {
+	    if (!arguments.length) return _brightness;
 	    _brightness = d;
-	    if (context.mode()) { dispatch$1.call('change'); }
+	    if (context.mode()) dispatch.call('change');
 	    return background;
 	  };
 
-
-	  background.contrast = function(d) {
-	    if (!arguments.length) { return _contrast; }
+	  background.contrast = function (d) {
+	    if (!arguments.length) return _contrast;
 	    _contrast = d;
-	    if (context.mode()) { dispatch$1.call('change'); }
+	    if (context.mode()) dispatch.call('change');
 	    return background;
 	  };
 
-
-	  background.saturation = function(d) {
-	    if (!arguments.length) { return _saturation; }
+	  background.saturation = function (d) {
+	    if (!arguments.length) return _saturation;
 	    _saturation = d;
-	    if (context.mode()) { dispatch$1.call('change'); }
+	    if (context.mode()) dispatch.call('change');
 	    return background;
 	  };
 
-
-	  background.sharpness = function(d) {
-	    if (!arguments.length) { return _sharpness; }
+	  background.sharpness = function (d) {
+	    if (!arguments.length) return _sharpness;
 	    _sharpness = d;
-	    if (context.mode()) { dispatch$1.call('change'); }
+	    if (context.mode()) dispatch.call('change');
 	    return background;
 	  };
 
 	  var _loadPromise;
 
 	  background.ensureLoaded = function () {
-
-	    if (_loadPromise) { return _loadPromise; }
+	    if (_loadPromise) return _loadPromise;
 
 	    function parseMapParams(qmap) {
-	      if (!qmap) { return false; }
+	      if (!qmap) return false;
 	      var params = qmap.split('/').map(Number);
-	      if (params.length < 3 || params.some(isNaN)) { return false; }
-	      return geoExtent([params[2], params[1]]);  // lon,lat
+	      if (params.length < 3 || params.some(isNaN)) return false;
+	      return geoExtent([params[2], params[1]]); // lon,lat
 	    }
 
 	    var hash = utilStringQs(window.location.hash);
 	    var requested = hash.background || hash.layer;
 	    var extent = parseMapParams(hash.map);
+	    return _loadPromise = ensureImageryIndex().then(function (imageryIndex) {
+	      var first = imageryIndex.backgrounds.length && imageryIndex.backgrounds[0];
+	      var best;
 
-	    return _loadPromise = ensureImageryIndex()
-	      .then(function (imageryIndex) {
-	        var first = imageryIndex.backgrounds.length && imageryIndex.backgrounds[0];
+	      if (!requested && extent) {
+	        best = background.sources(extent).find(function (s) {
+	          return s.best();
+	        });
+	      } // Decide which background layer to display
 
-	        var best;
-	        if (!requested && extent) {
-	          best = background.sources(extent).find(function (s) { return s.best(); });
-	        }
 
-	        // Decide which background layer to display
-	        if (requested && requested.indexOf('custom:') === 0) {
-	          var template = requested.replace(/^custom:/, '');
-	          var custom = background.findSource('custom');
-	          background.baseLayerSource(custom.template(template));
-	          corePreferences('background-custom-template', template);
-	        } else {
-	          background.baseLayerSource(
-	            background.findSource(requested) ||
-	            best ||
-	            background.findSource(corePreferences('background-last-used')) ||
-	            background.findSource('Bing') ||
-	            first ||
-	            background.findSource('none')
-	          );
-	        }
+	      if (requested && requested.indexOf('custom:') === 0) {
+	        var template = requested.replace(/^custom:/, '');
+	        var custom = background.findSource('custom');
+	        background.baseLayerSource(custom.template(template));
+	        corePreferences('background-custom-template', template);
+	      } else {
+	        background.baseLayerSource(background.findSource(requested) || best || background.findSource(corePreferences('background-last-used')) || background.findSource('Bing') || first || background.findSource('none'));
+	      }
+
+	      var locator = imageryIndex.backgrounds.find(function (d) {
+	        return d.overlay && d["default"];
+	      });
+
+	      if (locator) {
+	        background.toggleOverlayLayer(locator);
+	      }
+
+	      var overlays = (hash.overlays || '').split(',');
+	      overlays.forEach(function (overlay) {
+	        overlay = background.findSource(overlay);
 
-	        var locator = imageryIndex.backgrounds.find(function (d) { return d.overlay && d.default; });
-	        if (locator) {
-	          background.toggleOverlayLayer(locator);
+	        if (overlay) {
+	          background.toggleOverlayLayer(overlay);
 	        }
+	      });
 
-	        var overlays = (hash.overlays || '').split(',');
-	        overlays.forEach(function (overlay) {
-	          overlay = background.findSource(overlay);
-	          if (overlay) {
-	            background.toggleOverlayLayer(overlay);
-	          }
-	        });
+	      if (hash.gpx) {
+	        var gpx = context.layers().layer('data');
 
-	        if (hash.gpx) {
-	          var gpx = context.layers().layer('data');
-	          if (gpx) {
-	            gpx.url(hash.gpx, '.gpx');
-	          }
+	        if (gpx) {
+	          gpx.url(hash.gpx, '.gpx');
 	        }
+	      }
 
-	        if (hash.offset) {
-	          var offset = hash.offset
-	            .replace(/;/g, ',')
-	            .split(',')
-	            .map(function (n) { return !isNaN(n) && n; });
+	      if (hash.offset) {
+	        var offset = hash.offset.replace(/;/g, ',').split(',').map(function (n) {
+	          return !isNaN(n) && n;
+	        });
 
-	          if (offset.length === 2) {
-	            background.offset(geoMetersToOffset(offset));
-	          }
+	        if (offset.length === 2) {
+	          background.offset(geoMetersToOffset(offset));
 	        }
-	      })
-	      .catch(function () { /* ignore */ });
+	      }
+	    })["catch"](function () {
+	      /* ignore */
+	    });
 	  };
 
-
-	  return utilRebind(background, dispatch$1, 'on');
+	  return utilRebind(background, dispatch, 'on');
 	}
 
 	function rendererFeatures(context) {
-	    var dispatch$1 = dispatch('change', 'redraw');
-	    var features = utilRebind({}, dispatch$1, 'on');
-	    var _deferred = new Set();
-
-	    var traffic_roads = {
-	        'motorway': true,
-	        'motorway_link': true,
-	        'trunk': true,
-	        'trunk_link': true,
-	        'primary': true,
-	        'primary_link': true,
-	        'secondary': true,
-	        'secondary_link': true,
-	        'tertiary': true,
-	        'tertiary_link': true,
-	        'residential': true,
-	        'unclassified': true,
-	        'living_street': true
-	    };
+	  var dispatch = dispatch$8('change', 'redraw');
+	  var features = utilRebind({}, dispatch, 'on');
 
-	    var service_roads = {
-	        'service': true,
-	        'road': true,
-	        'track': true
-	    };
+	  var _deferred = new Set();
 
-	    var paths = {
-	        'path': true,
-	        'footway': true,
-	        'cycleway': true,
-	        'bridleway': true,
-	        'steps': true,
-	        'pedestrian': true
-	    };
+	  var traffic_roads = {
+	    'motorway': true,
+	    'motorway_link': true,
+	    'trunk': true,
+	    'trunk_link': true,
+	    'primary': true,
+	    'primary_link': true,
+	    'secondary': true,
+	    'secondary_link': true,
+	    'tertiary': true,
+	    'tertiary_link': true,
+	    'residential': true,
+	    'unclassified': true,
+	    'living_street': true
+	  };
+	  var service_roads = {
+	    'service': true,
+	    'road': true,
+	    'track': true
+	  };
+	  var paths = {
+	    'path': true,
+	    'footway': true,
+	    'cycleway': true,
+	    'bridleway': true,
+	    'steps': true,
+	    'pedestrian': true
+	  };
+	  var past_futures = {
+	    'proposed': true,
+	    'construction': true,
+	    'abandoned': true,
+	    'dismantled': true,
+	    'disused': true,
+	    'razed': true,
+	    'demolished': true,
+	    'obliterated': true
+	  };
+	  var _cullFactor = 1;
+	  var _cache = {};
+	  var _rules = {};
+	  var _stats = {};
+	  var _keys = [];
+	  var _hidden = [];
+	  var _forceVisible = {};
+
+	  function update() {
+	    if (!window.mocha) {
+	      var hash = utilStringQs(window.location.hash);
+	      var disabled = features.disabled();
+
+	      if (disabled.length) {
+	        hash.disable_features = disabled.join(',');
+	      } else {
+	        delete hash.disable_features;
+	      }
+
+	      window.location.replace('#' + utilQsString(hash, true));
+	      corePreferences('disabled-features', disabled.join(','));
+	    }
+
+	    _hidden = features.hidden();
+	    dispatch.call('change');
+	    dispatch.call('redraw');
+	  }
+
+	  function defineRule(k, filter, max) {
+	    var isEnabled = true;
 
-	    var past_futures = {
-	        'proposed': true,
-	        'construction': true,
-	        'abandoned': true,
-	        'dismantled': true,
-	        'disused': true,
-	        'razed': true,
-	        'demolished': true,
-	        'obliterated': true
+	    _keys.push(k);
+
+	    _rules[k] = {
+	      filter: filter,
+	      enabled: isEnabled,
+	      // whether the user wants it enabled..
+	      count: 0,
+	      currentMax: max || Infinity,
+	      defaultMax: max || Infinity,
+	      enable: function enable() {
+	        this.enabled = true;
+	        this.currentMax = this.defaultMax;
+	      },
+	      disable: function disable() {
+	        this.enabled = false;
+	        this.currentMax = 0;
+	      },
+	      hidden: function hidden() {
+	        return this.count === 0 && !this.enabled || this.count > this.currentMax * _cullFactor;
+	      },
+	      autoHidden: function autoHidden() {
+	        return this.hidden() && this.currentMax > 0;
+	      }
 	    };
+	  }
 
-	    var _cullFactor = 1;
-	    var _cache = {};
-	    var _rules = {};
-	    var _stats = {};
-	    var _keys = [];
-	    var _hidden = [];
-	    var _forceVisible = {};
+	  defineRule('points', function isPoint(tags, geometry) {
+	    return geometry === 'point';
+	  }, 200);
+	  defineRule('traffic_roads', function isTrafficRoad(tags) {
+	    return traffic_roads[tags.highway];
+	  });
+	  defineRule('service_roads', function isServiceRoad(tags) {
+	    return service_roads[tags.highway];
+	  });
+	  defineRule('paths', function isPath(tags) {
+	    return paths[tags.highway];
+	  });
+	  defineRule('buildings', function isBuilding(tags) {
+	    return !!tags.building && tags.building !== 'no' || tags.parking === 'multi-storey' || tags.parking === 'sheds' || tags.parking === 'carports' || tags.parking === 'garage_boxes';
+	  }, 250);
+	  defineRule('building_parts', function isBuildingPart(tags) {
+	    return tags['building:part'];
+	  });
+	  defineRule('indoor', function isIndoor(tags) {
+	    return tags.indoor;
+	  });
+	  defineRule('landuse', function isLanduse(tags, geometry) {
+	    return geometry === 'area' && !_rules.buildings.filter(tags) && !_rules.building_parts.filter(tags) && !_rules.indoor.filter(tags) && !_rules.water.filter(tags) && !_rules.pistes.filter(tags);
+	  });
+	  defineRule('boundaries', function isBoundary(tags) {
+	    return !!tags.boundary && !(traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway] || tags.waterway || tags.railway || tags.landuse || tags.natural || tags.building || tags.power);
+	  });
+	  defineRule('water', function isWater(tags) {
+	    return !!tags.waterway || tags.natural === 'water' || tags.natural === 'coastline' || tags.natural === 'bay' || tags.landuse === 'pond' || tags.landuse === 'basin' || tags.landuse === 'reservoir' || tags.landuse === 'salt_pond';
+	  });
+	  defineRule('rail', function isRail(tags) {
+	    return (!!tags.railway || tags.landuse === 'railway') && !(traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway]);
+	  });
+	  defineRule('pistes', function isPiste(tags) {
+	    return tags['piste:type'];
+	  });
+	  defineRule('aerialways', function isPiste(tags) {
+	    return tags.aerialway && tags.aerialway !== 'yes' && tags.aerialway !== 'station';
+	  });
+	  defineRule('power', function isPower(tags) {
+	    return !!tags.power;
+	  }); // contains a past/future tag, but not in active use as a road/path/cycleway/etc..
 
+	  defineRule('past_future', function isPastFuture(tags) {
+	    if (traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway]) {
+	      return false;
+	    }
 
-	    function update() {
-	        if (!window.mocha) {
-	            var hash = utilStringQs(window.location.hash);
-	            var disabled = features.disabled();
-	            if (disabled.length) {
-	                hash.disable_features = disabled.join(',');
-	            } else {
-	                delete hash.disable_features;
-	            }
-	            window.location.replace('#' + utilQsString(hash, true));
-	            corePreferences('disabled-features', disabled.join(','));
-	        }
-	        _hidden = features.hidden();
-	        dispatch$1.call('change');
-	        dispatch$1.call('redraw');
-	    }
-
-
-	    function defineRule(k, filter, max) {
-	        var isEnabled = true;
-
-	        _keys.push(k);
-	        _rules[k] = {
-	            filter: filter,
-	            enabled: isEnabled,   // whether the user wants it enabled..
-	            count: 0,
-	            currentMax: (max || Infinity),
-	            defaultMax: (max || Infinity),
-	            enable: function() { this.enabled = true; this.currentMax = this.defaultMax; },
-	            disable: function() { this.enabled = false; this.currentMax = 0; },
-	            hidden: function() {
-	                return (this.count === 0 && !this.enabled) ||
-	                    this.count > this.currentMax * _cullFactor;
-	            },
-	            autoHidden: function() { return this.hidden() && this.currentMax > 0; }
-	        };
+	    var strings = Object.keys(tags);
+
+	    for (var i = 0; i < strings.length; i++) {
+	      var s = strings[i];
+
+	      if (past_futures[s] || past_futures[tags[s]]) {
+	        return true;
+	      }
 	    }
 
+	    return false;
+	  }); // Lines or areas that don't match another feature filter.
+	  // IMPORTANT: The 'others' feature must be the last one defined,
+	  //   so that code in getMatches can skip this test if `hasMatch = true`
 
-	    defineRule('points', function isPoint(tags, geometry) {
-	        return geometry === 'point';
-	    }, 200);
+	  defineRule('others', function isOther(tags, geometry) {
+	    return geometry === 'line' || geometry === 'area';
+	  });
 
-	    defineRule('traffic_roads', function isTrafficRoad(tags) {
-	        return traffic_roads[tags.highway];
-	    });
+	  features.features = function () {
+	    return _rules;
+	  };
 
-	    defineRule('service_roads', function isServiceRoad(tags) {
-	        return service_roads[tags.highway];
-	    });
+	  features.keys = function () {
+	    return _keys;
+	  };
 
-	    defineRule('paths', function isPath(tags) {
-	        return paths[tags.highway];
-	    });
+	  features.enabled = function (k) {
+	    if (!arguments.length) {
+	      return _keys.filter(function (k) {
+	        return _rules[k].enabled;
+	      });
+	    }
 
-	    defineRule('buildings', function isBuilding(tags) {
-	        return (
-	            (!!tags.building && tags.building !== 'no') ||
-	            tags.parking === 'multi-storey' ||
-	            tags.parking === 'sheds' ||
-	            tags.parking === 'carports' ||
-	            tags.parking === 'garage_boxes'
-	        );
-	    }, 250);
-
-	    defineRule('building_parts', function isBuildingPart(tags) {
-	        return tags['building:part'];
-	    });
-
-	    defineRule('indoor', function isIndoor(tags) {
-	        return tags.indoor;
-	    });
-
-	    defineRule('landuse', function isLanduse(tags, geometry) {
-	        return geometry === 'area' &&
-	            !_rules.buildings.filter(tags) &&
-	            !_rules.building_parts.filter(tags) &&
-	            !_rules.indoor.filter(tags) &&
-	            !_rules.water.filter(tags) &&
-	            !_rules.pistes.filter(tags);
-	    });
-
-	    defineRule('boundaries', function isBoundary(tags) {
-	        return (
-	            !!tags.boundary
-	        ) && !(
-	            traffic_roads[tags.highway] ||
-	            service_roads[tags.highway] ||
-	            paths[tags.highway] ||
-	            tags.waterway ||
-	            tags.railway ||
-	            tags.landuse ||
-	            tags.natural ||
-	            tags.building ||
-	            tags.power
-	        );
-	    });
+	    return _rules[k] && _rules[k].enabled;
+	  };
 
-	    defineRule('water', function isWater(tags) {
-	        return (
-	            !!tags.waterway ||
-	            tags.natural === 'water' ||
-	            tags.natural === 'coastline' ||
-	            tags.natural === 'bay' ||
-	            tags.landuse === 'pond' ||
-	            tags.landuse === 'basin' ||
-	            tags.landuse === 'reservoir' ||
-	            tags.landuse === 'salt_pond'
-	        );
-	    });
+	  features.disabled = function (k) {
+	    if (!arguments.length) {
+	      return _keys.filter(function (k) {
+	        return !_rules[k].enabled;
+	      });
+	    }
 
-	    defineRule('rail', function isRail(tags) {
-	        return (
-	            !!tags.railway ||
-	            tags.landuse === 'railway'
-	        ) && !(
-	            traffic_roads[tags.highway] ||
-	            service_roads[tags.highway] ||
-	            paths[tags.highway]
-	        );
-	    });
+	    return _rules[k] && !_rules[k].enabled;
+	  };
 
-	    defineRule('pistes', function isPiste(tags) {
-	        return tags['piste:type'];
-	    });
+	  features.hidden = function (k) {
+	    if (!arguments.length) {
+	      return _keys.filter(function (k) {
+	        return _rules[k].hidden();
+	      });
+	    }
 
-	    defineRule('aerialways', function isPiste(tags) {
-	        return tags.aerialway &&
-	            tags.aerialway !== 'yes' &&
-	            tags.aerialway !== 'station';
-	    });
+	    return _rules[k] && _rules[k].hidden();
+	  };
 
-	    defineRule('power', function isPower(tags) {
-	        return !!tags.power;
-	    });
+	  features.autoHidden = function (k) {
+	    if (!arguments.length) {
+	      return _keys.filter(function (k) {
+	        return _rules[k].autoHidden();
+	      });
+	    }
 
-	    // contains a past/future tag, but not in active use as a road/path/cycleway/etc..
-	    defineRule('past_future', function isPastFuture(tags) {
-	        if (
-	            traffic_roads[tags.highway] ||
-	            service_roads[tags.highway] ||
-	            paths[tags.highway]
-	        ) { return false; }
+	    return _rules[k] && _rules[k].autoHidden();
+	  };
 
-	        var strings = Object.keys(tags);
+	  features.enable = function (k) {
+	    if (_rules[k] && !_rules[k].enabled) {
+	      _rules[k].enable();
 
-	        for (var i = 0; i < strings.length; i++) {
-	            var s = strings[i];
-	            if (past_futures[s] || past_futures[tags[s]]) { return true; }
-	        }
-	        return false;
-	    });
+	      update();
+	    }
+	  };
 
-	    // Lines or areas that don't match another feature filter.
-	    // IMPORTANT: The 'others' feature must be the last one defined,
-	    //   so that code in getMatches can skip this test if `hasMatch = true`
-	    defineRule('others', function isOther(tags, geometry) {
-	        return (geometry === 'line' || geometry === 'area');
-	    });
+	  features.enableAll = function () {
+	    var didEnable = false;
 
+	    for (var k in _rules) {
+	      if (!_rules[k].enabled) {
+	        didEnable = true;
 
+	        _rules[k].enable();
+	      }
+	    }
 
-	    features.features = function() {
-	        return _rules;
-	    };
+	    if (didEnable) update();
+	  };
 
+	  features.disable = function (k) {
+	    if (_rules[k] && _rules[k].enabled) {
+	      _rules[k].disable();
 
-	    features.keys = function() {
-	        return _keys;
-	    };
+	      update();
+	    }
+	  };
 
+	  features.disableAll = function () {
+	    var didDisable = false;
 
-	    features.enabled = function(k) {
-	        if (!arguments.length) {
-	            return _keys.filter(function(k) { return _rules[k].enabled; });
-	        }
-	        return _rules[k] && _rules[k].enabled;
-	    };
+	    for (var k in _rules) {
+	      if (_rules[k].enabled) {
+	        didDisable = true;
 
+	        _rules[k].disable();
+	      }
+	    }
 
-	    features.disabled = function(k) {
-	        if (!arguments.length) {
-	            return _keys.filter(function(k) { return !_rules[k].enabled; });
-	        }
-	        return _rules[k] && !_rules[k].enabled;
-	    };
+	    if (didDisable) update();
+	  };
 
+	  features.toggle = function (k) {
+	    if (_rules[k]) {
+	      (function (f) {
+	        return f.enabled ? f.disable() : f.enable();
+	      })(_rules[k]);
 
-	    features.hidden = function(k) {
-	        if (!arguments.length) {
-	            return _keys.filter(function(k) { return _rules[k].hidden(); });
-	        }
-	        return _rules[k] && _rules[k].hidden();
-	    };
+	      update();
+	    }
+	  };
 
+	  features.resetStats = function () {
+	    for (var i = 0; i < _keys.length; i++) {
+	      _rules[_keys[i]].count = 0;
+	    }
 
-	    features.autoHidden = function(k) {
-	        if (!arguments.length) {
-	            return _keys.filter(function(k) { return _rules[k].autoHidden(); });
-	        }
-	        return _rules[k] && _rules[k].autoHidden();
-	    };
+	    dispatch.call('change');
+	  };
 
+	  features.gatherStats = function (d, resolver, dimensions) {
+	    var needsRedraw = false;
+	    var types = utilArrayGroupBy(d, 'type');
+	    var entities = [].concat(types.relation || [], types.way || [], types.node || []);
+	    var currHidden, geometry, matches, i, j;
 
-	    features.enable = function(k) {
-	        if (_rules[k] && !_rules[k].enabled) {
-	            _rules[k].enable();
-	            update();
-	        }
-	    };
+	    for (i = 0; i < _keys.length; i++) {
+	      _rules[_keys[i]].count = 0;
+	    } // adjust the threshold for point/building culling based on viewport size..
+	    // a _cullFactor of 1 corresponds to a 1000x1000px viewport..
 
-	    features.enableAll = function() {
-	        var didEnable = false;
-	        for (var k in _rules) {
-	            if (!_rules[k].enabled) {
-	                didEnable = true;
-	                _rules[k].enable();
-	            }
-	        }
-	        if (didEnable) { update(); }
-	    };
 
+	    _cullFactor = dimensions[0] * dimensions[1] / 1000000;
 
-	    features.disable = function(k) {
-	        if (_rules[k] && _rules[k].enabled) {
-	            _rules[k].disable();
-	            update();
-	        }
-	    };
+	    for (i = 0; i < entities.length; i++) {
+	      geometry = entities[i].geometry(resolver);
+	      matches = Object.keys(features.getMatches(entities[i], resolver, geometry));
 
-	    features.disableAll = function() {
-	        var didDisable = false;
-	        for (var k in _rules) {
-	            if (_rules[k].enabled) {
-	                didDisable = true;
-	                _rules[k].disable();
-	            }
-	        }
-	        if (didDisable) { update(); }
-	    };
+	      for (j = 0; j < matches.length; j++) {
+	        _rules[matches[j]].count++;
+	      }
+	    }
 
+	    currHidden = features.hidden();
 
-	    features.toggle = function(k) {
-	        if (_rules[k]) {
-	            (function(f) { return f.enabled ? f.disable() : f.enable(); }(_rules[k]));
-	            update();
-	        }
-	    };
+	    if (currHidden !== _hidden) {
+	      _hidden = currHidden;
+	      needsRedraw = true;
+	      dispatch.call('change');
+	    }
 
+	    return needsRedraw;
+	  };
 
-	    features.resetStats = function() {
-	        for (var i = 0; i < _keys.length; i++) {
-	            _rules[_keys[i]].count = 0;
-	        }
-	        dispatch$1.call('change');
-	    };
+	  features.stats = function () {
+	    for (var i = 0; i < _keys.length; i++) {
+	      _stats[_keys[i]] = _rules[_keys[i]].count;
+	    }
+
+	    return _stats;
+	  };
 
+	  features.clear = function (d) {
+	    for (var i = 0; i < d.length; i++) {
+	      features.clearEntity(d[i]);
+	    }
+	  };
 
-	    features.gatherStats = function(d, resolver, dimensions) {
-	        var needsRedraw = false;
-	        var types = utilArrayGroupBy(d, 'type');
-	        var entities = [].concat(types.relation || [], types.way || [], types.node || []);
-	        var currHidden, geometry, matches, i, j;
+	  features.clearEntity = function (entity) {
+	    delete _cache[osmEntity.key(entity)];
+	  };
 
-	        for (i = 0; i < _keys.length; i++) {
-	            _rules[_keys[i]].count = 0;
-	        }
+	  features.reset = function () {
+	    Array.from(_deferred).forEach(function (handle) {
+	      window.cancelIdleCallback(handle);
+
+	      _deferred["delete"](handle);
+	    });
+	    _cache = {};
+	  }; // only certain relations are worth checking
+
+
+	  function relationShouldBeChecked(relation) {
+	    // multipolygon features have `area` geometry and aren't checked here
+	    return relation.tags.type === 'boundary';
+	  }
+
+	  features.getMatches = function (entity, resolver, geometry) {
+	    if (geometry === 'vertex' || geometry === 'relation' && !relationShouldBeChecked(entity)) return {};
+	    var ent = osmEntity.key(entity);
+
+	    if (!_cache[ent]) {
+	      _cache[ent] = {};
+	    }
+
+	    if (!_cache[ent].matches) {
+	      var matches = {};
+	      var hasMatch = false;
+
+	      for (var i = 0; i < _keys.length; i++) {
+	        if (_keys[i] === 'others') {
+	          if (hasMatch) continue; // If an entity...
+	          //   1. is a way that hasn't matched other 'interesting' feature rules,
+
+	          if (entity.type === 'way') {
+	            var parents = features.getParents(entity, resolver, geometry); //   2a. belongs only to a single multipolygon relation
 
-	        // adjust the threshold for point/building culling based on viewport size..
-	        // a _cullFactor of 1 corresponds to a 1000x1000px viewport..
-	        _cullFactor = dimensions[0] * dimensions[1] / 1000000;
+	            if (parents.length === 1 && parents[0].isMultipolygon() || // 2b. or belongs only to boundary relations
+	            parents.length > 0 && parents.every(function (parent) {
+	              return parent.tags.type === 'boundary';
+	            })) {
+	              // ...then match whatever feature rules the parent relation has matched.
+	              // see #2548, #2887
+	              //
+	              // IMPORTANT:
+	              // For this to work, getMatches must be called on relations before ways.
+	              //
+	              var pkey = osmEntity.key(parents[0]);
+
+	              if (_cache[pkey] && _cache[pkey].matches) {
+	                matches = Object.assign({}, _cache[pkey].matches); // shallow copy
 
-	        for (i = 0; i < entities.length; i++) {
-	            geometry = entities[i].geometry(resolver);
-	            matches = Object.keys(features.getMatches(entities[i], resolver, geometry));
-	            for (j = 0; j < matches.length; j++) {
-	                _rules[matches[j]].count++;
+	                continue;
+	              }
 	            }
+	          }
 	        }
 
-	        currHidden = features.hidden();
-	        if (currHidden !== _hidden) {
-	            _hidden = currHidden;
-	            needsRedraw = true;
-	            dispatch$1.call('change');
+	        if (_rules[_keys[i]].filter(entity.tags, geometry)) {
+	          matches[_keys[i]] = hasMatch = true;
 	        }
+	      }
 
-	        return needsRedraw;
-	    };
+	      _cache[ent].matches = matches;
+	    }
 
+	    return _cache[ent].matches;
+	  };
 
-	    features.stats = function() {
-	        for (var i = 0; i < _keys.length; i++) {
-	            _stats[_keys[i]] = _rules[_keys[i]].count;
-	        }
+	  features.getParents = function (entity, resolver, geometry) {
+	    if (geometry === 'point') return [];
+	    var ent = osmEntity.key(entity);
 
-	        return _stats;
-	    };
+	    if (!_cache[ent]) {
+	      _cache[ent] = {};
+	    }
+
+	    if (!_cache[ent].parents) {
+	      var parents = [];
+
+	      if (geometry === 'vertex') {
+	        parents = resolver.parentWays(entity);
+	      } else {
+	        // 'line', 'area', 'relation'
+	        parents = resolver.parentRelations(entity);
+	      }
+
+	      _cache[ent].parents = parents;
+	    }
+
+	    return _cache[ent].parents;
+	  };
 
+	  features.isHiddenPreset = function (preset, geometry) {
+	    if (!_hidden.length) return false;
+	    if (!preset.tags) return false;
+	    var test = preset.setTags({}, geometry);
 
-	    features.clear = function(d) {
-	        for (var i = 0; i < d.length; i++) {
-	            features.clearEntity(d[i]);
+	    for (var key in _rules) {
+	      if (_rules[key].filter(test, geometry)) {
+	        if (_hidden.indexOf(key) !== -1) {
+	          return key;
 	        }
-	    };
 
+	        return false;
+	      }
+	    }
 
-	    features.clearEntity = function(entity) {
-	        delete _cache[osmEntity.key(entity)];
-	    };
+	    return false;
+	  };
 
+	  features.isHiddenFeature = function (entity, resolver, geometry) {
+	    if (!_hidden.length) return false;
+	    if (!entity.version) return false;
+	    if (_forceVisible[entity.id]) return false;
+	    var matches = Object.keys(features.getMatches(entity, resolver, geometry));
+	    return matches.length && matches.every(function (k) {
+	      return features.hidden(k);
+	    });
+	  };
 
-	    features.reset = function() {
-	        Array.from(_deferred).forEach(function(handle) {
-	            window.cancelIdleCallback(handle);
-	            _deferred.delete(handle);
-	        });
+	  features.isHiddenChild = function (entity, resolver, geometry) {
+	    if (!_hidden.length) return false;
+	    if (!entity.version || geometry === 'point') return false;
+	    if (_forceVisible[entity.id]) return false;
+	    var parents = features.getParents(entity, resolver, geometry);
+	    if (!parents.length) return false;
 
-	        _cache = {};
-	    };
+	    for (var i = 0; i < parents.length; i++) {
+	      if (!features.isHidden(parents[i], resolver, parents[i].geometry(resolver))) {
+	        return false;
+	      }
+	    }
 
-	    // only certain relations are worth checking
-	    function relationShouldBeChecked(relation) {
-	        // multipolygon features have `area` geometry and aren't checked here
-	        return relation.tags.type === 'boundary';
-	    }
-
-	    features.getMatches = function(entity, resolver, geometry) {
-	        if (geometry === 'vertex' ||
-	            (geometry === 'relation' && !relationShouldBeChecked(entity))) { return {}; }
-
-	        var ent = osmEntity.key(entity);
-	        if (!_cache[ent]) {
-	            _cache[ent] = {};
-	        }
-
-	        if (!_cache[ent].matches) {
-	            var matches = {};
-	            var hasMatch = false;
-
-	            for (var i = 0; i < _keys.length; i++) {
-	                if (_keys[i] === 'others') {
-	                    if (hasMatch) { continue; }
-
-	                    // If an entity...
-	                    //   1. is a way that hasn't matched other 'interesting' feature rules,
-	                    if (entity.type === 'way') {
-	                        var parents = features.getParents(entity, resolver, geometry);
-
-	                        //   2a. belongs only to a single multipolygon relation
-	                        if ((parents.length === 1 && parents[0].isMultipolygon()) ||
-	                            // 2b. or belongs only to boundary relations
-	                            (parents.length > 0 && parents.every(function(parent) { return parent.tags.type === 'boundary'; }))) {
-
-	                            // ...then match whatever feature rules the parent relation has matched.
-	                            // see #2548, #2887
-	                            //
-	                            // IMPORTANT:
-	                            // For this to work, getMatches must be called on relations before ways.
-	                            //
-	                            var pkey = osmEntity.key(parents[0]);
-	                            if (_cache[pkey] && _cache[pkey].matches) {
-	                                matches = Object.assign({}, _cache[pkey].matches);  // shallow copy
-	                                continue;
-	                            }
-	                        }
-	                    }
-	                }
+	    return true;
+	  };
 
-	                if (_rules[_keys[i]].filter(entity.tags, geometry)) {
-	                    matches[_keys[i]] = hasMatch = true;
-	                }
-	            }
-	            _cache[ent].matches = matches;
+	  features.hasHiddenConnections = function (entity, resolver) {
+	    if (!_hidden.length) return false;
+	    var childNodes, connections;
+
+	    if (entity.type === 'midpoint') {
+	      childNodes = [resolver.entity(entity.edge[0]), resolver.entity(entity.edge[1])];
+	      connections = [];
+	    } else {
+	      childNodes = entity.nodes ? resolver.childNodes(entity) : [];
+	      connections = features.getParents(entity, resolver, entity.geometry(resolver));
+	    } // gather ways connected to child nodes..
+
+
+	    connections = childNodes.reduce(function (result, e) {
+	      return resolver.isShared(e) ? utilArrayUnion(result, resolver.parentWays(e)) : result;
+	    }, connections);
+	    return connections.some(function (e) {
+	      return features.isHidden(e, resolver, e.geometry(resolver));
+	    });
+	  };
+
+	  features.isHidden = function (entity, resolver, geometry) {
+	    if (!_hidden.length) return false;
+	    if (!entity.version) return false;
+	    var fn = geometry === 'vertex' ? features.isHiddenChild : features.isHiddenFeature;
+	    return fn(entity, resolver, geometry);
+	  };
+
+	  features.filter = function (d, resolver) {
+	    if (!_hidden.length) return d;
+	    var result = [];
+
+	    for (var i = 0; i < d.length; i++) {
+	      var entity = d[i];
+
+	      if (!features.isHidden(entity, resolver, entity.geometry(resolver))) {
+	        result.push(entity);
+	      }
+	    }
+
+	    return result;
+	  };
+
+	  features.forceVisible = function (entityIDs) {
+	    if (!arguments.length) return Object.keys(_forceVisible);
+	    _forceVisible = {};
+
+	    for (var i = 0; i < entityIDs.length; i++) {
+	      _forceVisible[entityIDs[i]] = true;
+	      var entity = context.hasEntity(entityIDs[i]);
+
+	      if (entity && entity.type === 'relation') {
+	        // also show relation members (one level deep)
+	        for (var j in entity.members) {
+	          _forceVisible[entity.members[j].id] = true;
 	        }
+	      }
+	    }
 
-	        return _cache[ent].matches;
-	    };
+	    return features;
+	  };
+
+	  features.init = function () {
+	    var storage = corePreferences('disabled-features');
+
+	    if (storage) {
+	      var storageDisabled = storage.replace(/;/g, ',').split(',');
+	      storageDisabled.forEach(features.disable);
+	    }
+
+	    var hash = utilStringQs(window.location.hash);
+
+	    if (hash.disable_features) {
+	      var hashDisabled = hash.disable_features.replace(/;/g, ',').split(',');
+	      hashDisabled.forEach(features.disable);
+	    }
+	  }; // warm up the feature matching cache upon merging fetched data
+
+
+	  context.history().on('merge.features', function (newEntities) {
+	    if (!newEntities) return;
+	    var handle = window.requestIdleCallback(function () {
+	      var graph = context.graph();
+	      var types = utilArrayGroupBy(newEntities, 'type'); // ensure that getMatches is called on relations before ways
+
+	      var entities = [].concat(types.relation || [], types.way || [], types.node || []);
+
+	      for (var i = 0; i < entities.length; i++) {
+	        var geometry = entities[i].geometry(graph);
+	        features.getMatches(entities[i], graph, geometry);
+	      }
+	    });
+
+	    _deferred.add(handle);
+	  });
+	  return features;
+	}
+
+	/** Error message constants. */
+
+	var FUNC_ERROR_TEXT = 'Expected a function';
+	/**
+	 * Creates a throttled function that only invokes `func` at most once per
+	 * every `wait` milliseconds. The throttled function comes with a `cancel`
+	 * method to cancel delayed `func` invocations and a `flush` method to
+	 * immediately invoke them. Provide `options` to indicate whether `func`
+	 * should be invoked on the leading and/or trailing edge of the `wait`
+	 * timeout. The `func` is invoked with the last arguments provided to the
+	 * throttled function. Subsequent calls to the throttled function return the
+	 * result of the last `func` invocation.
+	 *
+	 * **Note:** If `leading` and `trailing` options are `true`, `func` is
+	 * invoked on the trailing edge of the timeout only if the throttled function
+	 * is invoked more than once during the `wait` timeout.
+	 *
+	 * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
+	 * until to the next tick, similar to `setTimeout` with a timeout of `0`.
+	 *
+	 * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
+	 * for details over the differences between `_.throttle` and `_.debounce`.
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 0.1.0
+	 * @category Function
+	 * @param {Function} func The function to throttle.
+	 * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
+	 * @param {Object} [options={}] The options object.
+	 * @param {boolean} [options.leading=true]
+	 *  Specify invoking on the leading edge of the timeout.
+	 * @param {boolean} [options.trailing=true]
+	 *  Specify invoking on the trailing edge of the timeout.
+	 * @returns {Function} Returns the new throttled function.
+	 * @example
+	 *
+	 * // Avoid excessively updating the position while scrolling.
+	 * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
+	 *
+	 * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
+	 * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
+	 * jQuery(element).on('click', throttled);
+	 *
+	 * // Cancel the trailing throttled invocation.
+	 * jQuery(window).on('popstate', throttled.cancel);
+	 */
+
+	function throttle(func, wait, options) {
+	  var leading = true,
+	      trailing = true;
+
+	  if (typeof func != 'function') {
+	    throw new TypeError(FUNC_ERROR_TEXT);
+	  }
+
+	  if (isObject$2(options)) {
+	    leading = 'leading' in options ? !!options.leading : leading;
+	    trailing = 'trailing' in options ? !!options.trailing : trailing;
+	  }
+
+	  return debounce(func, wait, {
+	    'leading': leading,
+	    'maxWait': wait,
+	    'trailing': trailing
+	  });
+	}
+
+	//
+	// - the activeID - nope
+	// - 1 away (adjacent) to the activeID - yes (vertices will be merged)
+	// - 2 away from the activeID - nope (would create a self intersecting segment)
+	// - all others on a linear way - yes
+	// - all others on a closed way - nope (would create a self intersecting polygon)
+	//
+	// returns
+	// 0 = active vertex - no touch/connect
+	// 1 = passive vertex - yes touch/connect
+	// 2 = adjacent vertex - yes but pay attention segmenting a line here
+	//
+
+	function svgPassiveVertex(node, graph, activeID) {
+	  if (!activeID) return 1;
+	  if (activeID === node.id) return 0;
+	  var parents = graph.parentWays(node);
+	  var i, j, nodes, isClosed, ix1, ix2, ix3, ix4, max;
+
+	  for (i = 0; i < parents.length; i++) {
+	    nodes = parents[i].nodes;
+	    isClosed = parents[i].isClosed();
+
+	    for (j = 0; j < nodes.length; j++) {
+	      // find this vertex, look nearby
+	      if (nodes[j] === node.id) {
+	        ix1 = j - 2;
+	        ix2 = j - 1;
+	        ix3 = j + 1;
+	        ix4 = j + 2;
+
+	        if (isClosed) {
+	          // wraparound if needed
+	          max = nodes.length - 1;
+	          if (ix1 < 0) ix1 = max + ix1;
+	          if (ix2 < 0) ix2 = max + ix2;
+	          if (ix3 > max) ix3 = ix3 - max;
+	          if (ix4 > max) ix4 = ix4 - max;
+	        }
+
+	        if (nodes[ix1] === activeID) return 0; // no - prevent self intersect
+	        else if (nodes[ix2] === activeID) return 2; // ok - adjacent
+	          else if (nodes[ix3] === activeID) return 2; // ok - adjacent
+	            else if (nodes[ix4] === activeID) return 0; // no - prevent self intersect
+	              else if (isClosed && nodes.indexOf(activeID) !== -1) return 0; // no - prevent self intersect
+	      }
+	    }
+	  }
+
+	  return 1; // ok
+	}
+	function svgMarkerSegments(projection, graph, dt, shouldReverse, bothDirections) {
+	  return function (entity) {
+	    var i = 0;
+	    var offset = dt;
+	    var segments = [];
+	    var clip = d3_geoIdentity().clipExtent(projection.clipExtent()).stream;
+	    var coordinates = graph.childNodes(entity).map(function (n) {
+	      return n.loc;
+	    });
+	    var a, b;
+
+	    if (shouldReverse(entity)) {
+	      coordinates.reverse();
+	    }
+
+	    d3_geoStream({
+	      type: 'LineString',
+	      coordinates: coordinates
+	    }, projection.stream(clip({
+	      lineStart: function lineStart() {},
+	      lineEnd: function lineEnd() {
+	        a = null;
+	      },
+	      point: function point(x, y) {
+	        b = [x, y];
 
+	        if (a) {
+	          var span = geoVecLength(a, b) - offset;
 
-	    features.getParents = function(entity, resolver, geometry) {
-	        if (geometry === 'point') { return []; }
+	          if (span >= 0) {
+	            var heading = geoVecAngle(a, b);
+	            var dx = dt * Math.cos(heading);
+	            var dy = dt * Math.sin(heading);
+	            var p = [a[0] + offset * Math.cos(heading), a[1] + offset * Math.sin(heading)]; // gather coordinates
 
-	        var ent = osmEntity.key(entity);
-	        if (!_cache[ent]) {
-	            _cache[ent] = {};
-	        }
+	            var coord = [a, p];
 
-	        if (!_cache[ent].parents) {
-	            var parents = [];
-	            if (geometry === 'vertex') {
-	                parents = resolver.parentWays(entity);
-	            } else {   // 'line', 'area', 'relation'
-	                parents = resolver.parentRelations(entity);
+	            for (span -= dt; span >= 0; span -= dt) {
+	              p = geoVecAdd(p, [dx, dy]);
+	              coord.push(p);
 	            }
-	            _cache[ent].parents = parents;
-	        }
-	        return _cache[ent].parents;
-	    };
 
+	            coord.push(b); // generate svg paths
 
-	    features.isHiddenPreset = function(preset, geometry) {
-	        if (!_hidden.length) { return false; }
-	        if (!preset.tags) { return false; }
+	            var segment = '';
+	            var j;
 
-	        var test = preset.setTags({}, geometry);
-	        for (var key in _rules) {
-	            if (_rules[key].filter(test, geometry)) {
-	                if (_hidden.indexOf(key) !== -1) {
-	                    return key;
-	                }
-	                return false;
+	            for (j = 0; j < coord.length; j++) {
+	              segment += (j === 0 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
 	            }
-	        }
-	        return false;
-	    };
-
-
-	    features.isHiddenFeature = function(entity, resolver, geometry) {
-	        if (!_hidden.length) { return false; }
-	        if (!entity.version) { return false; }
-	        if (_forceVisible[entity.id]) { return false; }
-
-	        var matches = Object.keys(features.getMatches(entity, resolver, geometry));
-	        return matches.length && matches.every(function(k) { return features.hidden(k); });
-	    };
 
+	            segments.push({
+	              id: entity.id,
+	              index: i++,
+	              d: segment
+	            });
 
-	    features.isHiddenChild = function(entity, resolver, geometry) {
-	        if (!_hidden.length) { return false; }
-	        if (!entity.version || geometry === 'point') { return false; }
-	        if (_forceVisible[entity.id]) { return false; }
+	            if (bothDirections(entity)) {
+	              segment = '';
 
-	        var parents = features.getParents(entity, resolver, geometry);
-	        if (!parents.length) { return false; }
+	              for (j = coord.length - 1; j >= 0; j--) {
+	                segment += (j === coord.length - 1 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
+	              }
 
-	        for (var i = 0; i < parents.length; i++) {
-	            if (!features.isHidden(parents[i], resolver, parents[i].geometry(resolver))) {
-	                return false;
+	              segments.push({
+	                id: entity.id,
+	                index: i++,
+	                d: segment
+	              });
 	            }
+	          }
+
+	          offset = -span;
 	        }
-	        return true;
-	    };
 
+	        a = b;
+	      }
+	    })));
+	    return segments;
+	  };
+	}
+	function svgPath(projection, graph, isArea) {
+	  // Explanation of magic numbers:
+	  // "padding" here allows space for strokes to extend beyond the viewport,
+	  // so that the stroke isn't drawn along the edge of the viewport when
+	  // the shape is clipped.
+	  //
+	  // When drawing lines, pad viewport by 5px.
+	  // When drawing areas, pad viewport by 65px in each direction to allow
+	  // for 60px area fill stroke (see ".fill-partial path.fill" css rule)
+	  var cache = {};
+	  var padding = isArea ? 65 : 5;
+	  var viewport = projection.clipExtent();
+	  var paddedExtent = [[viewport[0][0] - padding, viewport[0][1] - padding], [viewport[1][0] + padding, viewport[1][1] + padding]];
+	  var clip = d3_geoIdentity().clipExtent(paddedExtent).stream;
+	  var project = projection.stream;
+	  var path = d3_geoPath().projection({
+	    stream: function stream(output) {
+	      return project(clip(output));
+	    }
+	  });
 
-	    features.hasHiddenConnections = function(entity, resolver) {
-	        if (!_hidden.length) { return false; }
+	  var svgpath = function svgpath(entity) {
+	    if (entity.id in cache) {
+	      return cache[entity.id];
+	    } else {
+	      return cache[entity.id] = path(entity.asGeoJSON(graph));
+	    }
+	  };
 
-	        var childNodes, connections;
-	        if (entity.type === 'midpoint') {
-	            childNodes = [resolver.entity(entity.edge[0]), resolver.entity(entity.edge[1])];
-	            connections = [];
-	        } else {
-	            childNodes = entity.nodes ? resolver.childNodes(entity) : [];
-	            connections = features.getParents(entity, resolver, entity.geometry(resolver));
-	        }
+	  svgpath.geojson = function (d) {
+	    if (d.__featurehash__ !== undefined) {
+	      if (d.__featurehash__ in cache) {
+	        return cache[d.__featurehash__];
+	      } else {
+	        return cache[d.__featurehash__] = path(d);
+	      }
+	    } else {
+	      return path(d);
+	    }
+	  };
 
-	        // gather ways connected to child nodes..
-	        connections = childNodes.reduce(function(result, e) {
-	            return resolver.isShared(e) ? utilArrayUnion(result, resolver.parentWays(e)) : result;
-	        }, connections);
+	  return svgpath;
+	}
+	function svgPointTransform(projection) {
+	  var svgpoint = function svgpoint(entity) {
+	    // http://jsperf.com/short-array-join
+	    var pt = projection(entity.loc);
+	    return 'translate(' + pt[0] + ',' + pt[1] + ')';
+	  };
 
-	        return connections.some(function(e) {
-	            return features.isHidden(e, resolver, e.geometry(resolver));
-	        });
-	    };
+	  svgpoint.geojson = function (d) {
+	    return svgpoint(d.properties.entity);
+	  };
 
+	  return svgpoint;
+	}
+	function svgRelationMemberTags(graph) {
+	  return function (entity) {
+	    var tags = entity.tags;
+	    var shouldCopyMultipolygonTags = !entity.hasInterestingTags();
+	    graph.parentRelations(entity).forEach(function (relation) {
+	      var type = relation.tags.type;
 
-	    features.isHidden = function(entity, resolver, geometry) {
-	        if (!_hidden.length) { return false; }
-	        if (!entity.version) { return false; }
+	      if (type === 'multipolygon' && shouldCopyMultipolygonTags || type === 'boundary') {
+	        tags = Object.assign({}, relation.tags, tags);
+	      }
+	    });
+	    return tags;
+	  };
+	}
+	function svgSegmentWay(way, graph, activeID) {
+	  // When there is no activeID, we can memoize this expensive computation
+	  if (activeID === undefined) {
+	    return graph["transient"](way, 'waySegments', getWaySegments);
+	  } else {
+	    return getWaySegments();
+	  }
 
-	        var fn = (geometry === 'vertex' ? features.isHiddenChild : features.isHiddenFeature);
-	        return fn(entity, resolver, geometry);
+	  function getWaySegments() {
+	    var isActiveWay = way.nodes.indexOf(activeID) !== -1;
+	    var features = {
+	      passive: [],
+	      active: []
 	    };
+	    var start = {};
+	    var end = {};
+	    var node, type;
 
+	    for (var i = 0; i < way.nodes.length; i++) {
+	      node = graph.entity(way.nodes[i]);
+	      type = svgPassiveVertex(node, graph, activeID);
+	      end = {
+	        node: node,
+	        type: type
+	      };
 
-	    features.filter = function(d, resolver) {
-	        if (!_hidden.length) { return d; }
-
-	        var result = [];
-	        for (var i = 0; i < d.length; i++) {
-	            var entity = d[i];
-	            if (!features.isHidden(entity, resolver, entity.geometry(resolver))) {
-	                result.push(entity);
-	            }
+	      if (start.type !== undefined) {
+	        if (start.node.id === activeID || end.node.id === activeID) ; else if (isActiveWay && (start.type === 2 || end.type === 2)) {
+	          // one adjacent vertex
+	          pushActive(start, end, i);
+	        } else if (start.type === 0 && end.type === 0) {
+	          // both active vertices
+	          pushActive(start, end, i);
+	        } else {
+	          pushPassive(start, end, i);
 	        }
-	        return result;
-	    };
+	      }
 
+	      start = end;
+	    }
 
-	    features.forceVisible = function(entityIDs) {
-	        if (!arguments.length) { return Object.keys(_forceVisible); }
+	    return features;
 
-	        _forceVisible = {};
-	        for (var i = 0; i < entityIDs.length; i++) {
-	            _forceVisible[entityIDs[i]] = true;
-	            var entity = context.hasEntity(entityIDs[i]);
-	            if (entity && entity.type === 'relation') {
-	                // also show relation members (one level deep)
-	                for (var j in entity.members) {
-	                    _forceVisible[entity.members[j].id] = true;
-	                }
-	            }
+	    function pushActive(start, end, index) {
+	      features.active.push({
+	        type: 'Feature',
+	        id: way.id + '-' + index + '-nope',
+	        properties: {
+	          nope: true,
+	          target: true,
+	          entity: way,
+	          nodes: [start.node, end.node],
+	          index: index
+	        },
+	        geometry: {
+	          type: 'LineString',
+	          coordinates: [start.node.loc, end.node.loc]
 	        }
-	        return features;
-	    };
-
+	      });
+	    }
 
-	    features.init = function() {
-	        var storage = corePreferences('disabled-features');
-	        if (storage) {
-	            var storageDisabled = storage.replace(/;/g, ',').split(',');
-	            storageDisabled.forEach(features.disable);
+	    function pushPassive(start, end, index) {
+	      features.passive.push({
+	        type: 'Feature',
+	        id: way.id + '-' + index,
+	        properties: {
+	          target: true,
+	          entity: way,
+	          nodes: [start.node, end.node],
+	          index: index
+	        },
+	        geometry: {
+	          type: 'LineString',
+	          coordinates: [start.node.loc, end.node.loc]
 	        }
+	      });
+	    }
+	  }
+	}
 
-	        var hash = utilStringQs(window.location.hash);
-	        if (hash.disable_features) {
-	            var hashDisabled = hash.disable_features.replace(/;/g, ',').split(',');
-	            hashDisabled.forEach(features.disable);
-	        }
-	    };
+	function svgTagClasses() {
+	  var primaries = ['building', 'highway', 'railway', 'waterway', 'aeroway', 'aerialway', 'piste:type', 'boundary', 'power', 'amenity', 'natural', 'landuse', 'leisure', 'military', 'place', 'man_made', 'route', 'attraction', 'building:part', 'indoor'];
+	  var statuses = [// nonexistent, might be built
+	  'proposed', 'planned', // under maintentance or between groundbreaking and opening
+	  'construction', // existent but not functional
+	  'disused', // dilapidated to nonexistent
+	  'abandoned', // nonexistent, still may appear in imagery
+	  'dismantled', 'razed', 'demolished', 'obliterated', // existent occasionally, e.g. stormwater drainage basin
+	  'intermittent'];
+	  var secondaries = ['oneway', 'bridge', 'tunnel', 'embankment', 'cutting', 'barrier', 'surface', 'tracktype', 'footway', 'crossing', 'service', 'sport', 'public_transport', 'location', 'parking', 'golf', 'type', 'leisure', 'man_made', 'indoor'];
+
+	  var _tags = function _tags(entity) {
+	    return entity.tags;
+	  };
+
+	  var tagClasses = function tagClasses(selection) {
+	    selection.each(function tagClassesEach(entity) {
+	      var value = this.className;
+
+	      if (value.baseVal !== undefined) {
+	        value = value.baseVal;
+	      }
 
+	      var t = _tags(entity);
 
-	    // warm up the feature matching cache upon merging fetched data
-	    context.history().on('merge.features', function(newEntities) {
-	        if (!newEntities) { return; }
-	        var handle = window.requestIdleCallback(function() {
-	            var graph = context.graph();
-	            var types = utilArrayGroupBy(newEntities, 'type');
-	            // ensure that getMatches is called on relations before ways
-	            var entities = [].concat(types.relation || [], types.way || [], types.node || []);
-	            for (var i = 0; i < entities.length; i++) {
-	                var geometry = entities[i].geometry(graph);
-	                features.getMatches(entities[i], graph, geometry);
-	            }
-	        });
-	        _deferred.add(handle);
+	      var computed = tagClasses.getClassesString(t, value);
+
+	      if (computed !== value) {
+	        select(this).attr('class', computed);
+	      }
 	    });
+	  };
 
+	  tagClasses.getClassesString = function (t, value) {
+	    var primary, status;
+	    var i, j, k, v; // in some situations we want to render perimeter strokes a certain way
 
-	    return features;
-	}
+	    var overrideGeometry;
 
-	// Touch targets control which other vertices we can drag a vertex onto.
-	//
-	// - the activeID - nope
-	// - 1 away (adjacent) to the activeID - yes (vertices will be merged)
-	// - 2 away from the activeID - nope (would create a self intersecting segment)
-	// - all others on a linear way - yes
-	// - all others on a closed way - nope (would create a self intersecting polygon)
-	//
-	// returns
-	// 0 = active vertex - no touch/connect
-	// 1 = passive vertex - yes touch/connect
-	// 2 = adjacent vertex - yes but pay attention segmenting a line here
-	//
-	function svgPassiveVertex(node, graph, activeID) {
-	    if (!activeID) { return 1; }
-	    if (activeID === node.id) { return 0; }
+	    if (/\bstroke\b/.test(value)) {
+	      if (!!t.barrier && t.barrier !== 'no') {
+	        overrideGeometry = 'line';
+	      }
+	    } // preserve base classes (nothing with `tag-`)
+
+
+	    var classes = value.trim().split(/\s+/).filter(function (klass) {
+	      return klass.length && !/^tag-/.test(klass);
+	    }).map(function (klass) {
+	      // special overrides for some perimeter strokes
+	      return klass === 'line' || klass === 'area' ? overrideGeometry || klass : klass;
+	    }); // pick at most one primary classification tag..
+
+	    for (i = 0; i < primaries.length; i++) {
+	      k = primaries[i];
+	      v = t[k];
+	      if (!v || v === 'no') continue;
+
+	      if (k === 'piste:type') {
+	        // avoid a ':' in the class name
+	        k = 'piste';
+	      } else if (k === 'building:part') {
+	        // avoid a ':' in the class name
+	        k = 'building_part';
+	      }
 
-	    var parents = graph.parentWays(node);
+	      primary = k;
 
-	    var i, j, nodes, isClosed, ix1, ix2, ix3, ix4, max;
+	      if (statuses.indexOf(v) !== -1) {
+	        // e.g. `railway=abandoned`
+	        status = v;
+	        classes.push('tag-' + k);
+	      } else {
+	        classes.push('tag-' + k);
+	        classes.push('tag-' + k + '-' + v);
+	      }
 
-	    for (i = 0; i < parents.length; i++) {
-	        nodes = parents[i].nodes;
-	        isClosed = parents[i].isClosed();
-	        for (j = 0; j < nodes.length; j++) {   // find this vertex, look nearby
-	            if (nodes[j] === node.id) {
-	                ix1 = j - 2;
-	                ix2 = j - 1;
-	                ix3 = j + 1;
-	                ix4 = j + 2;
-
-	                if (isClosed) {  // wraparound if needed
-	                    max = nodes.length - 1;
-	                    if (ix1 < 0)   { ix1 = max + ix1; }
-	                    if (ix2 < 0)   { ix2 = max + ix2; }
-	                    if (ix3 > max) { ix3 = ix3 - max; }
-	                    if (ix4 > max) { ix4 = ix4 - max; }
-	                }
+	      break;
+	    }
 
-	                if (nodes[ix1] === activeID) { return 0; }        // no - prevent self intersect
-	                else if (nodes[ix2] === activeID) { return 2; }   // ok - adjacent
-	                else if (nodes[ix3] === activeID) { return 2; }   // ok - adjacent
-	                else if (nodes[ix4] === activeID) { return 0; }   // no - prevent self intersect
-	                else if (isClosed && nodes.indexOf(activeID) !== -1) { return 0; }  // no - prevent self intersect
-	            }
+	    if (!primary) {
+	      for (i = 0; i < statuses.length; i++) {
+	        for (j = 0; j < primaries.length; j++) {
+	          k = statuses[i] + ':' + primaries[j]; // e.g. `demolished:building=yes`
+
+	          v = t[k];
+	          if (!v || v === 'no') continue;
+	          status = statuses[i];
+	          break;
 	        }
+	      }
+	    } // add at most one status tag, only if relates to primary tag..
+
+
+	    if (!status) {
+	      for (i = 0; i < statuses.length; i++) {
+	        k = statuses[i];
+	        v = t[k];
+	        if (!v || v === 'no') continue;
+
+	        if (v === 'yes') {
+	          // e.g. `railway=rail + abandoned=yes`
+	          status = k;
+	        } else if (primary && primary === v) {
+	          // e.g. `railway=rail + abandoned=railway`
+	          status = k;
+	        } else if (!primary && primaries.indexOf(v) !== -1) {
+	          // e.g. `abandoned=railway`
+	          status = k;
+	          primary = v;
+	          classes.push('tag-' + v);
+	        } // else ignore e.g.  `highway=path + abandoned=railway`
+
+
+	        if (status) break;
+	      }
 	    }
 
-	    return 1;   // ok
-	}
-
-
-	function svgMarkerSegments(projection, graph, dt,
-	                                  shouldReverse,
-	                                  bothDirections) {
-	    return function(entity) {
-	        var i = 0;
-	        var offset = dt;
-	        var segments = [];
-	        var clip = d3_geoIdentity().clipExtent(projection.clipExtent()).stream;
-	        var coordinates = graph.childNodes(entity).map(function(n) { return n.loc; });
-	        var a, b;
-
-	        if (shouldReverse(entity)) {
-	            coordinates.reverse();
-	        }
-
-	        d3_geoStream({
-	            type: 'LineString',
-	            coordinates: coordinates
-	        }, projection.stream(clip({
-	            lineStart: function() {},
-	            lineEnd: function() { a = null; },
-	            point: function(x, y) {
-	                b = [x, y];
-
-	                if (a) {
-	                    var span = geoVecLength(a, b) - offset;
-
-	                    if (span >= 0) {
-	                        var heading = geoVecAngle(a, b);
-	                        var dx = dt * Math.cos(heading);
-	                        var dy = dt * Math.sin(heading);
-	                        var p = [
-	                            a[0] + offset * Math.cos(heading),
-	                            a[1] + offset * Math.sin(heading)
-	                        ];
-
-	                        // gather coordinates
-	                        var coord = [a, p];
-	                        for (span -= dt; span >= 0; span -= dt) {
-	                            p = geoVecAdd(p, [dx, dy]);
-	                            coord.push(p);
-	                        }
-	                        coord.push(b);
-
-	                        // generate svg paths
-	                        var segment = '';
-	                        var j;
-
-	                        for (j = 0; j < coord.length; j++) {
-	                            segment += (j === 0 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
-	                        }
-	                        segments.push({ id: entity.id, index: i++, d: segment });
-
-	                        if (bothDirections(entity)) {
-	                            segment = '';
-	                            for (j = coord.length - 1; j >= 0; j--) {
-	                                segment += (j === coord.length - 1 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
-	                            }
-	                            segments.push({ id: entity.id, index: i++, d: segment });
-	                        }
-	                    }
-
-	                    offset = -span;
-	                }
+	    if (status) {
+	      classes.push('tag-status');
+	      classes.push('tag-status-' + status);
+	    } // add any secondary tags
 
-	                a = b;
-	            }
-	        })));
 
-	        return segments;
-	    };
-	}
+	    for (i = 0; i < secondaries.length; i++) {
+	      k = secondaries[i];
+	      v = t[k];
+	      if (!v || v === 'no' || k === primary) continue;
+	      classes.push('tag-' + k);
+	      classes.push('tag-' + k + '-' + v);
+	    } // For highways, look for surface tagging..
 
 
-	function svgPath(projection, graph, isArea) {
+	    if (primary === 'highway' && !osmPathHighwayTagValues[t.highway] || primary === 'aeroway') {
+	      var surface = t.highway === 'track' ? 'unpaved' : 'paved';
 
-	    // Explanation of magic numbers:
-	    // "padding" here allows space for strokes to extend beyond the viewport,
-	    // so that the stroke isn't drawn along the edge of the viewport when
-	    // the shape is clipped.
-	    //
-	    // When drawing lines, pad viewport by 5px.
-	    // When drawing areas, pad viewport by 65px in each direction to allow
-	    // for 60px area fill stroke (see ".fill-partial path.fill" css rule)
+	      for (k in t) {
+	        v = t[k];
 
-	    var cache = {};
-	    var padding = isArea ? 65 : 5;
-	    var viewport = projection.clipExtent();
-	    var paddedExtent = [
-	        [viewport[0][0] - padding, viewport[0][1] - padding],
-	        [viewport[1][0] + padding, viewport[1][1] + padding]
-	    ];
-	    var clip = d3_geoIdentity().clipExtent(paddedExtent).stream;
-	    var project = projection.stream;
-	    var path = d3_geoPath()
-	        .projection({stream: function(output) { return project(clip(output)); }});
-
-	    var svgpath = function(entity) {
-	        if (entity.id in cache) {
-	            return cache[entity.id];
-	        } else {
-	            return cache[entity.id] = path(entity.asGeoJSON(graph));
+	        if (k in osmPavedTags) {
+	          surface = osmPavedTags[k][v] ? 'paved' : 'unpaved';
 	        }
-	    };
 
-	    svgpath.geojson = function(d) {
-	        if (d.__featurehash__ !== undefined) {
-	            if (d.__featurehash__ in cache) {
-	                return cache[d.__featurehash__];
-	            } else {
-	                return cache[d.__featurehash__] = path(d);
-	            }
-	        } else {
-	            return path(d);
+	        if (k in osmSemipavedTags && !!osmSemipavedTags[k][v]) {
+	          surface = 'semipaved';
 	        }
-	    };
+	      }
 
-	    return svgpath;
-	}
+	      classes.push('tag-' + surface);
+	    } // If this is a wikidata-tagged item, add a class for that..
 
 
-	function svgPointTransform(projection) {
-	    var svgpoint = function(entity) {
-	        // http://jsperf.com/short-array-join
-	        var pt = projection(entity.loc);
-	        return 'translate(' + pt[0] + ',' + pt[1] + ')';
-	    };
+	    var qid = t.wikidata || t['flag:wikidata'] || t['brand:wikidata'] || t['network:wikidata'] || t['operator:wikidata'];
 
-	    svgpoint.geojson = function(d) {
-	        return svgpoint(d.properties.entity);
-	    };
+	    if (qid) {
+	      classes.push('tag-wikidata');
+	    }
 
-	    return svgpoint;
-	}
+	    return classes.join(' ').trim();
+	  };
 
+	  tagClasses.tags = function (val) {
+	    if (!arguments.length) return _tags;
+	    _tags = val;
+	    return tagClasses;
+	  };
 
-	function svgRelationMemberTags(graph) {
-	    return function(entity) {
-	        var tags = entity.tags;
-	        var shouldCopyMultipolygonTags = !entity.hasInterestingTags();
-	        graph.parentRelations(entity).forEach(function(relation) {
-	            var type = relation.tags.type;
-	            if ((type === 'multipolygon' && shouldCopyMultipolygonTags) || type === 'boundary') {
-	                tags = Object.assign({}, relation.tags, tags);
-	            }
-	        });
-	        return tags;
-	    };
+	  return tagClasses;
 	}
 
+	// Patterns only work in Firefox when set directly on element.
+	// (This is not a bug: https://bugzilla.mozilla.org/show_bug.cgi?id=750632)
+	var patterns = {
+	  // tag - pattern name
+	  // -or-
+	  // tag - value - pattern name
+	  // -or-
+	  // tag - value - rules (optional tag-values, pattern name)
+	  // (matches earlier rules first, so fallback should be last entry)
+	  amenity: {
+	    grave_yard: 'cemetery',
+	    fountain: 'water_standing'
+	  },
+	  landuse: {
+	    cemetery: [{
+	      religion: 'christian',
+	      pattern: 'cemetery_christian'
+	    }, {
+	      religion: 'buddhist',
+	      pattern: 'cemetery_buddhist'
+	    }, {
+	      religion: 'muslim',
+	      pattern: 'cemetery_muslim'
+	    }, {
+	      religion: 'jewish',
+	      pattern: 'cemetery_jewish'
+	    }, {
+	      pattern: 'cemetery'
+	    }],
+	    construction: 'construction',
+	    farmland: 'farmland',
+	    farmyard: 'farmyard',
+	    forest: [{
+	      leaf_type: 'broadleaved',
+	      pattern: 'forest_broadleaved'
+	    }, {
+	      leaf_type: 'needleleaved',
+	      pattern: 'forest_needleleaved'
+	    }, {
+	      leaf_type: 'leafless',
+	      pattern: 'forest_leafless'
+	    }, {
+	      pattern: 'forest'
+	    } // same as 'leaf_type:mixed'
+	    ],
+	    grave_yard: 'cemetery',
+	    grass: [{
+	      golf: 'green',
+	      pattern: 'golf_green'
+	    }, {
+	      pattern: 'grass'
+	    }],
+	    landfill: 'landfill',
+	    meadow: 'meadow',
+	    military: 'construction',
+	    orchard: 'orchard',
+	    quarry: 'quarry',
+	    vineyard: 'vineyard'
+	  },
+	  natural: {
+	    beach: 'beach',
+	    grassland: 'grass',
+	    sand: 'beach',
+	    scrub: 'scrub',
+	    water: [{
+	      water: 'pond',
+	      pattern: 'pond'
+	    }, {
+	      water: 'reservoir',
+	      pattern: 'water_standing'
+	    }, {
+	      pattern: 'waves'
+	    }],
+	    wetland: [{
+	      wetland: 'marsh',
+	      pattern: 'wetland_marsh'
+	    }, {
+	      wetland: 'swamp',
+	      pattern: 'wetland_swamp'
+	    }, {
+	      wetland: 'bog',
+	      pattern: 'wetland_bog'
+	    }, {
+	      wetland: 'reedbed',
+	      pattern: 'wetland_reedbed'
+	    }, {
+	      pattern: 'wetland'
+	    }],
+	    wood: [{
+	      leaf_type: 'broadleaved',
+	      pattern: 'forest_broadleaved'
+	    }, {
+	      leaf_type: 'needleleaved',
+	      pattern: 'forest_needleleaved'
+	    }, {
+	      leaf_type: 'leafless',
+	      pattern: 'forest_leafless'
+	    }, {
+	      pattern: 'forest'
+	    } // same as 'leaf_type:mixed'
+	    ]
+	  },
+	  traffic_calming: {
+	    island: [{
+	      surface: 'grass',
+	      pattern: 'grass'
+	    }],
+	    chicane: [{
+	      surface: 'grass',
+	      pattern: 'grass'
+	    }],
+	    choker: [{
+	      surface: 'grass',
+	      pattern: 'grass'
+	    }]
+	  }
+	};
+	function svgTagPattern(tags) {
+	  // Skip pattern filling if this is a building (buildings don't get patterns applied)
+	  if (tags.building && tags.building !== 'no') {
+	    return null;
+	  }
+
+	  for (var tag in patterns) {
+	    var entityValue = tags[tag];
+	    if (!entityValue) continue;
 
-	function svgSegmentWay(way, graph, activeID) {
-	    // When there is no activeID, we can memoize this expensive computation
-	    if (activeID === undefined) {
-	        return graph.transient(way, 'waySegments', getWaySegments);
+	    if (typeof patterns[tag] === 'string') {
+	      // extra short syntax (just tag) - pattern name
+	      return 'pattern-' + patterns[tag];
 	    } else {
-	        return getWaySegments();
-	    }
-
-	    function getWaySegments() {
-	        var isActiveWay = (way.nodes.indexOf(activeID) !== -1);
-	        var features = { passive: [], active: [] };
-	        var start = {};
-	        var end = {};
-	        var node, type;
-
-	        for (var i = 0; i < way.nodes.length; i++) {
-	            node = graph.entity(way.nodes[i]);
-	            type = svgPassiveVertex(node, graph, activeID);
-	            end = { node: node, type: type };
-
-	            if (start.type !== undefined) {
-	                if (start.node.id === activeID || end.node.id === activeID) ; else if (isActiveWay && (start.type === 2 || end.type === 2)) {   // one adjacent vertex
-	                    pushActive(start, end, i);
-	                } else if (start.type === 0 && end.type === 0) {   // both active vertices
-	                    pushActive(start, end, i);
-	                } else {
-	                    pushPassive(start, end, i);
-	                }
-	            }
+	      var values = patterns[tag];
 
-	            start = end;
-	        }
+	      for (var value in values) {
+	        if (entityValue !== value) continue;
+	        var rules = values[value];
 
-	        return features;
+	        if (typeof rules === 'string') {
+	          // short syntax - pattern name
+	          return 'pattern-' + rules;
+	        } // long syntax - rule array
 
-	        function pushActive(start, end, index) {
-	            features.active.push({
-	                type: 'Feature',
-	                id: way.id + '-' + index + '-nope',
-	                properties: {
-	                    nope: true,
-	                    target: true,
-	                    entity: way,
-	                    nodes: [start.node, end.node],
-	                    index: index
-	                },
-	                geometry: {
-	                    type: 'LineString',
-	                    coordinates: [start.node.loc, end.node.loc]
-	                }
-	            });
-	        }
 
-	        function pushPassive(start, end, index) {
-	            features.passive.push({
-	                type: 'Feature',
-	                id: way.id + '-' + index,
-	                properties: {
-	                    target: true,
-	                    entity: way,
-	                    nodes: [start.node, end.node],
-	                    index: index
-	                },
-	                geometry: {
-	                    type: 'LineString',
-	                    coordinates: [start.node.loc, end.node.loc]
-	                }
-	            });
+	        for (var ruleKey in rules) {
+	          var rule = rules[ruleKey];
+	          var pass = true;
+
+	          for (var criterion in rule) {
+	            if (criterion !== 'pattern') {
+	              // reserved for pattern name
+	              // The only rule is a required tag-value pair
+	              var v = tags[criterion];
+
+	              if (!v || v !== rule[criterion]) {
+	                pass = false;
+	                break;
+	              }
+	            }
+	          }
+
+	          if (pass) {
+	            return 'pattern-' + rule.pattern;
+	          }
 	        }
+	      }
 	    }
+	  }
+
+	  return null;
 	}
 
-	function svgTagClasses() {
-	    var primaries = [
-	        'building', 'highway', 'railway', 'waterway', 'aeroway', 'aerialway',
-	        'piste:type', 'boundary', 'power', 'amenity', 'natural', 'landuse',
-	        'leisure', 'military', 'place', 'man_made', 'route', 'attraction',
-	        'building:part', 'indoor'
-	    ];
-	    var statuses = [
-	        // nonexistent, might be built
-	        'proposed', 'planned',
-	        // under maintentance or between groundbreaking and opening
-	        'construction',
-	        // existent but not functional
-	        'disused',
-	        // dilapidated to nonexistent
-	        'abandoned',
-	        // nonexistent, still may appear in imagery
-	        'dismantled', 'razed', 'demolished', 'obliterated',
-	        // existent occasionally, e.g. stormwater drainage basin
-	        'intermittent'
-	    ];
-	    var secondaries = [
-	        'oneway', 'bridge', 'tunnel', 'embankment', 'cutting', 'barrier',
-	        'surface', 'tracktype', 'footway', 'crossing', 'service', 'sport',
-	        'public_transport', 'location', 'parking', 'golf', 'type', 'leisure',
-	        'man_made', 'indoor'
-	    ];
-	    var _tags = function(entity) { return entity.tags; };
+	function svgAreas(projection, context) {
+	  function getPatternStyle(tags) {
+	    var imageID = svgTagPattern(tags);
 
+	    if (imageID) {
+	      return 'url("#ideditor-' + imageID + '")';
+	    }
 
-	    var tagClasses = function(selection) {
-	        selection.each(function tagClassesEach(entity) {
-	            var value = this.className;
+	    return '';
+	  }
 
-	            if (value.baseVal !== undefined) {
-	                value = value.baseVal;
-	            }
+	  function drawTargets(selection, graph, entities, filter) {
+	    var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
+	    var getPath = svgPath(projection).geojson;
+	    var activeID = context.activeID();
+	    var base = context.history().base(); // The targets and nopes will be MultiLineString sub-segments of the ways
 
-	            var t = _tags(entity);
+	    var data = {
+	      targets: [],
+	      nopes: []
+	    };
+	    entities.forEach(function (way) {
+	      var features = svgSegmentWay(way, graph, activeID);
+	      data.targets.push.apply(data.targets, features.passive);
+	      data.nopes.push.apply(data.nopes, features.active);
+	    }); // Targets allow hover and vertex snapping
 
-	            var computed = tagClasses.getClassesString(t, value);
+	    var targetData = data.targets.filter(getPath);
+	    var targets = selection.selectAll('.area.target-allowed').filter(function (d) {
+	      return filter(d.properties.entity);
+	    }).data(targetData, function key(d) {
+	      return d.id;
+	    }); // exit
 
-	            if (computed !== value) {
-	                select(this).attr('class', computed);
-	            }
-	        });
-	    };
+	    targets.exit().remove();
 
+	    var segmentWasEdited = function segmentWasEdited(d) {
+	      var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes
 
-	    tagClasses.getClassesString = function(t, value) {
-	        var primary, status;
-	        var i, j, k, v;
+	      if (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
+	        return false;
+	      }
 
-	        // in some situations we want to render perimeter strokes a certain way
-	        var overrideGeometry;
-	        if (/\bstroke\b/.test(value)) {
-	            if (!!t.barrier && t.barrier !== 'no') {
-	                overrideGeometry = 'line';
-	            }
-	        }
+	      return d.properties.nodes.some(function (n) {
+	        return !base.entities[n.id] || !fastDeepEqual(graph.entities[n.id].loc, base.entities[n.id].loc);
+	      });
+	    }; // enter/update
 
-	        // preserve base classes (nothing with `tag-`)
-	        var classes = value.trim().split(/\s+/)
-	            .filter(function(klass) {
-	                return klass.length && !/^tag-/.test(klass);
-	            })
-	            .map(function(klass) {  // special overrides for some perimeter strokes
-	                return (klass === 'line' || klass === 'area') ? (overrideGeometry || klass) : klass;
-	            });
 
-	        // pick at most one primary classification tag..
-	        for (i = 0; i < primaries.length; i++) {
-	            k = primaries[i];
-	            v = t[k];
-	            if (!v || v === 'no') { continue; }
+	    targets.enter().append('path').merge(targets).attr('d', getPath).attr('class', function (d) {
+	      return 'way area target target-allowed ' + targetClass + d.id;
+	    }).classed('segment-edited', segmentWasEdited); // NOPE
 
-	            if (k === 'piste:type') {  // avoid a ':' in the class name
-	                k = 'piste';
-	            } else if (k === 'building:part') {  // avoid a ':' in the class name
-	                k = 'building_part';
-	            }
+	    var nopeData = data.nopes.filter(getPath);
+	    var nopes = selection.selectAll('.area.target-nope').filter(function (d) {
+	      return filter(d.properties.entity);
+	    }).data(nopeData, function key(d) {
+	      return d.id;
+	    }); // exit
 
-	            primary = k;
-	            if (statuses.indexOf(v) !== -1) {   // e.g. `railway=abandoned`
-	                status = v;
-	                classes.push('tag-' + k);
-	            } else {
-	                classes.push('tag-' + k);
-	                classes.push('tag-' + k + '-' + v);
-	            }
+	    nopes.exit().remove(); // enter/update
 
-	            break;
-	        }
+	    nopes.enter().append('path').merge(nopes).attr('d', getPath).attr('class', function (d) {
+	      return 'way area target target-nope ' + nopeClass + d.id;
+	    }).classed('segment-edited', segmentWasEdited);
+	  }
 
-	        if (!primary) {
-	            for (i = 0; i < statuses.length; i++) {
-	                for (j = 0; j < primaries.length; j++) {
-	                    k = statuses[i] + ':' + primaries[j];  // e.g. `demolished:building=yes`
-	                    v = t[k];
-	                    if (!v || v === 'no') { continue; }
+	  function drawAreas(selection, graph, entities, filter) {
+	    var path = svgPath(projection, graph, true);
+	    var areas = {};
+	    var multipolygon;
+	    var base = context.history().base();
 
-	                    status = statuses[i];
-	                    break;
-	                }
-	            }
-	        }
+	    for (var i = 0; i < entities.length; i++) {
+	      var entity = entities[i];
+	      if (entity.geometry(graph) !== 'area') continue;
+	      multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
 
-	        // add at most one status tag, only if relates to primary tag..
-	        if (!status) {
-	            for (i = 0; i < statuses.length; i++) {
-	                k = statuses[i];
-	                v = t[k];
-	                if (!v || v === 'no') { continue; }
+	      if (multipolygon) {
+	        areas[multipolygon.id] = {
+	          entity: multipolygon.mergeTags(entity.tags),
+	          area: Math.abs(entity.area(graph))
+	        };
+	      } else if (!areas[entity.id]) {
+	        areas[entity.id] = {
+	          entity: entity,
+	          area: Math.abs(entity.area(graph))
+	        };
+	      }
+	    }
 
-	                if (v === 'yes') {   // e.g. `railway=rail + abandoned=yes`
-	                    status = k;
-	                }
-	                else if (primary && primary === v) {  // e.g. `railway=rail + abandoned=railway`
-	                    status = k;
-	                } else if (!primary && primaries.indexOf(v) !== -1) {  // e.g. `abandoned=railway`
-	                    status = k;
-	                    primary = v;
-	                    classes.push('tag-' + v);
-	                }  // else ignore e.g.  `highway=path + abandoned=railway`
-
-	                if (status) { break; }
-	            }
-	        }
+	    var fills = Object.values(areas).filter(function hasPath(a) {
+	      return path(a.entity);
+	    });
+	    fills.sort(function areaSort(a, b) {
+	      return b.area - a.area;
+	    });
+	    fills = fills.map(function (a) {
+	      return a.entity;
+	    });
+	    var strokes = fills.filter(function (area) {
+	      return area.type === 'way';
+	    });
+	    var data = {
+	      clip: fills,
+	      shadow: strokes,
+	      stroke: strokes,
+	      fill: fills
+	    };
+	    var clipPaths = context.surface().selectAll('defs').selectAll('.clipPath-osm').filter(filter).data(data.clip, osmEntity.key);
+	    clipPaths.exit().remove();
+	    var clipPathsEnter = clipPaths.enter().append('clipPath').attr('class', 'clipPath-osm').attr('id', function (entity) {
+	      return 'ideditor-' + entity.id + '-clippath';
+	    });
+	    clipPathsEnter.append('path');
+	    clipPaths.merge(clipPathsEnter).selectAll('path').attr('d', path);
+	    var drawLayer = selection.selectAll('.layer-osm.areas');
+	    var touchLayer = selection.selectAll('.layer-touch.areas'); // Draw areas..
+
+	    var areagroup = drawLayer.selectAll('g.areagroup').data(['fill', 'shadow', 'stroke']);
+	    areagroup = areagroup.enter().append('g').attr('class', function (d) {
+	      return 'areagroup area-' + d;
+	    }).merge(areagroup);
+	    var paths = areagroup.selectAll('path').filter(filter).data(function (layer) {
+	      return data[layer];
+	    }, osmEntity.key);
+	    paths.exit().remove();
+	    var fillpaths = selection.selectAll('.area-fill path.area').nodes();
+	    var bisect = d3_bisector(function (node) {
+	      return -node.__data__.area(graph);
+	    }).left;
+
+	    function sortedByArea(entity) {
+	      if (this._parent.__data__ === 'fill') {
+	        return fillpaths[bisect(fillpaths, -entity.area(graph))];
+	      }
+	    }
 
-	        if (status) {
-	            classes.push('tag-status');
-	            classes.push('tag-status-' + status);
-	        }
+	    paths = paths.enter().insert('path', sortedByArea).merge(paths).each(function (entity) {
+	      var layer = this.parentNode.__data__;
+	      this.setAttribute('class', entity.type + ' area ' + layer + ' ' + entity.id);
 
-	        // add any secondary tags
-	        for (i = 0; i < secondaries.length; i++) {
-	            k = secondaries[i];
-	            v = t[k];
-	            if (!v || v === 'no' || k === primary) { continue; }
-	            classes.push('tag-' + k);
-	            classes.push('tag-' + k + '-' + v);
-	        }
+	      if (layer === 'fill') {
+	        this.setAttribute('clip-path', 'url(#ideditor-' + entity.id + '-clippath)');
+	        this.style.fill = this.style.stroke = getPatternStyle(entity.tags);
+	      }
+	    }).classed('added', function (d) {
+	      return !base.entities[d.id];
+	    }).classed('geometry-edited', function (d) {
+	      return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].nodes, base.entities[d.id].nodes);
+	    }).classed('retagged', function (d) {
+	      return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
+	    }).call(svgTagClasses()).attr('d', path); // Draw touch targets..
 
-	        // For highways, look for surface tagging..
-	        if ((primary === 'highway' && !osmPathHighwayTagValues[t.highway]) || primary === 'aeroway') {
-	            var surface = t.highway === 'track' ? 'unpaved' : 'paved';
-	            for (k in t) {
-	                v = t[k];
-	                if (k in osmPavedTags) {
-	                    surface = osmPavedTags[k][v] ? 'paved' : 'unpaved';
-	                }
-	                if (k in osmSemipavedTags && !!osmSemipavedTags[k][v]) {
-	                    surface = 'semipaved';
-	                }
-	            }
-	            classes.push('tag-' + surface);
-	        }
+	    touchLayer.call(drawTargets, graph, data.stroke, filter);
+	  }
 
-	        // If this is a wikidata-tagged item, add a class for that..
-	        if (t.wikidata || t['brand:wikidata']) {
-	            classes.push('tag-wikidata');
-	        }
+	  return drawAreas;
+	}
+
+	var fastJsonStableStringify = function fastJsonStableStringify(data, opts) {
+	  if (!opts) opts = {};
+	  if (typeof opts === 'function') opts = {
+	    cmp: opts
+	  };
+	  var cycles = typeof opts.cycles === 'boolean' ? opts.cycles : false;
 
-	        return classes.join(' ').trim();
+	  var cmp = opts.cmp && function (f) {
+	    return function (node) {
+	      return function (a, b) {
+	        var aobj = {
+	          key: a,
+	          value: node[a]
+	        };
+	        var bobj = {
+	          key: b,
+	          value: node[b]
+	        };
+	        return f(aobj, bobj);
+	      };
 	    };
+	  }(opts.cmp);
 
+	  var seen = [];
+	  return function stringify(node) {
+	    if (node && node.toJSON && typeof node.toJSON === 'function') {
+	      node = node.toJSON();
+	    }
 
-	    tagClasses.tags = function(val) {
-	        if (!arguments.length) { return _tags; }
-	        _tags = val;
-	        return tagClasses;
-	    };
+	    if (node === undefined) return;
+	    if (typeof node == 'number') return isFinite(node) ? '' + node : 'null';
+	    if (_typeof(node) !== 'object') return JSON.stringify(node);
+	    var i, out;
 
-	    return tagClasses;
-	}
+	    if (Array.isArray(node)) {
+	      out = '[';
 
-	// Patterns only work in Firefox when set directly on element.
-	// (This is not a bug: https://bugzilla.mozilla.org/show_bug.cgi?id=750632)
-	var patterns = {
-	    // tag - pattern name
-	    // -or-
-	    // tag - value - pattern name
-	    // -or-
-	    // tag - value - rules (optional tag-values, pattern name)
-	    // (matches earlier rules first, so fallback should be last entry)
-	    amenity: {
-	        grave_yard: 'cemetery',
-	        fountain: 'water_standing'
-	    },
-	    landuse: {
-	        cemetery: [
-	            { religion: 'christian', pattern: 'cemetery_christian' },
-	            { religion: 'buddhist', pattern: 'cemetery_buddhist' },
-	            { religion: 'muslim', pattern: 'cemetery_muslim' },
-	            { religion: 'jewish', pattern: 'cemetery_jewish' },
-	            { pattern: 'cemetery' }
-	        ],
-	        construction: 'construction',
-	        farmland: 'farmland',
-	        farmyard: 'farmyard',
-	        forest: [
-	            { leaf_type: 'broadleaved', pattern: 'forest_broadleaved' },
-	            { leaf_type: 'needleleaved', pattern: 'forest_needleleaved' },
-	            { leaf_type: 'leafless', pattern: 'forest_leafless' },
-	            { pattern: 'forest' } // same as 'leaf_type:mixed'
-	        ],
-	        grave_yard: 'cemetery',
-	        grass: [
-	            { golf: 'green', pattern: 'golf_green' },
-	            { pattern: 'grass' } ],
-	        landfill: 'landfill',
-	        meadow: 'meadow',
-	        military: 'construction',
-	        orchard: 'orchard',
-	        quarry: 'quarry',
-	        vineyard: 'vineyard'
-	    },
-	    natural: {
-	        beach: 'beach',
-	        grassland: 'grass',
-	        sand: 'beach',
-	        scrub: 'scrub',
-	        water: [
-	            { water: 'pond', pattern: 'pond' },
-	            { water: 'reservoir', pattern: 'water_standing' },
-	            { pattern: 'waves' }
-	        ],
-	        wetland: [
-	            { wetland: 'marsh', pattern: 'wetland_marsh' },
-	            { wetland: 'swamp', pattern: 'wetland_swamp' },
-	            { wetland: 'bog', pattern: 'wetland_bog' },
-	            { wetland: 'reedbed', pattern: 'wetland_reedbed' },
-	            { pattern: 'wetland' }
-	        ],
-	        wood: [
-	            { leaf_type: 'broadleaved', pattern: 'forest_broadleaved' },
-	            { leaf_type: 'needleleaved', pattern: 'forest_needleleaved' },
-	            { leaf_type: 'leafless', pattern: 'forest_leafless' },
-	            { pattern: 'forest' } // same as 'leaf_type:mixed'
-	        ]
-	    },
-	    traffic_calming: {
-	        island: [
-	            { surface: 'grass', pattern: 'grass' } ],
-	        chicane: [
-	            { surface: 'grass', pattern: 'grass' } ],
-	        choker: [
-	            { surface: 'grass', pattern: 'grass' } ]
-	    }
-	};
+	      for (i = 0; i < node.length; i++) {
+	        if (i) out += ',';
+	        out += stringify(node[i]) || 'null';
+	      }
 
-	function svgTagPattern(tags) {
-	    // Skip pattern filling if this is a building (buildings don't get patterns applied)
-	    if (tags.building && tags.building !== 'no') {
-	        return null;
+	      return out + ']';
 	    }
 
-	    for (var tag in patterns) {
-	        var entityValue = tags[tag];
-	        if (!entityValue) { continue; }
-
-	        if (typeof patterns[tag] === 'string') { // extra short syntax (just tag) - pattern name
-	            return 'pattern-' + patterns[tag];
-	        } else {
-	            var values = patterns[tag];
-	            for (var value in values) {
-	                if (entityValue !== value) { continue; }
+	    if (node === null) return 'null';
 
-	                var rules = values[value];
-	                if (typeof rules === 'string') { // short syntax - pattern name
-	                    return 'pattern-' + rules;
-	                }
+	    if (seen.indexOf(node) !== -1) {
+	      if (cycles) return JSON.stringify('__cycle__');
+	      throw new TypeError('Converting circular structure to JSON');
+	    }
 
-	                // long syntax - rule array
-	                for (var ruleKey in rules) {
-	                    var rule = rules[ruleKey];
-
-	                    var pass = true;
-	                    for (var criterion in rule) {
-	                        if (criterion !== 'pattern') { // reserved for pattern name
-	                            // The only rule is a required tag-value pair
-	                            var v = tags[criterion];
-	                            if (!v || v !== rule[criterion]) {
-	                                pass = false;
-	                                break;
-	                            }
-	                        }
-	                    }
+	    var seenIndex = seen.push(node) - 1;
+	    var keys = Object.keys(node).sort(cmp && cmp(node));
+	    out = '';
 
-	                    if (pass) {
-	                        return 'pattern-' + rule.pattern;
-	                    }
-	                }
-	            }
-	        }
+	    for (i = 0; i < keys.length; i++) {
+	      var key = keys[i];
+	      var value = stringify(node[key]);
+	      if (!value) continue;
+	      if (out) out += ',';
+	      out += JSON.stringify(key) + ':' + value;
 	    }
 
-	    return null;
-	}
+	    seen.splice(seenIndex, 1);
+	    return '{' + out + '}';
+	  }(data);
+	};
 
-	function svgAreas(projection, context) {
+	var $$2 = _export;
+	var $entries = objectToArray.entries;
 
+	// `Object.entries` method
+	// https://tc39.es/ecma262/#sec-object.entries
+	$$2({ target: 'Object', stat: true }, {
+	  entries: function entries(O) {
+	    return $entries(O);
+	  }
+	});
 
-	    function getPatternStyle(tags) {
-	        var imageID = svgTagPattern(tags);
-	        if (imageID) {
-	            return 'url("#ideditor-' + imageID + '")';
-	        }
-	        return '';
-	    }
+	var _marked = /*#__PURE__*/regeneratorRuntime.mark(gpxGen),
+	    _marked3 = /*#__PURE__*/regeneratorRuntime.mark(kmlGen);
 
+	// cast array x into numbers
+	// get the content of a text node, if any
+	function nodeVal(x) {
+	  if (x && x.normalize) {
+	    x.normalize();
+	  }
 
-	    function drawTargets(selection, graph, entities, filter) {
-	        var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-	        var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
-	        var getPath = svgPath(projection).geojson;
-	        var activeID = context.activeID();
-	        var base = context.history().base();
+	  return x && x.textContent || "";
+	} // one Y child of X, if any, otherwise null
 
-	        // The targets and nopes will be MultiLineString sub-segments of the ways
-	        var data = { targets: [], nopes: [] };
 
-	        entities.forEach(function(way) {
-	            var features = svgSegmentWay(way, graph, activeID);
-	            data.targets.push.apply(data.targets, features.passive);
-	            data.nopes.push.apply(data.nopes, features.active);
-	        });
+	function get1(x, y) {
+	  var n = x.getElementsByTagName(y);
+	  return n.length ? n[0] : null;
+	}
 
+	function getLineStyle(extensions) {
+	  var style = {};
 
-	        // Targets allow hover and vertex snapping
-	        var targetData = data.targets.filter(getPath);
-	        var targets = selection.selectAll('.area.target-allowed')
-	            .filter(function(d) { return filter(d.properties.entity); })
-	            .data(targetData, function key(d) { return d.id; });
+	  if (extensions) {
+	    var lineStyle = get1(extensions, "line");
 
-	        // exit
-	        targets.exit()
-	            .remove();
+	    if (lineStyle) {
+	      var color = nodeVal(get1(lineStyle, "color")),
+	          opacity = parseFloat(nodeVal(get1(lineStyle, "opacity"))),
+	          width = parseFloat(nodeVal(get1(lineStyle, "width")));
+	      if (color) style.stroke = color;
+	      if (!isNaN(opacity)) style["stroke-opacity"] = opacity; // GPX width is in mm, convert to px with 96 px per inch
 
-	        var segmentWasEdited = function(d) {
-	            var wayID = d.properties.entity.id;
-	            // if the whole line was edited, don't draw segment changes
-	            if (!base.entities[wayID] ||
-	                !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
-	                return false;
-	            }
-	            return d.properties.nodes.some(function(n) {
-	                return !base.entities[n.id] ||
-	                       !fastDeepEqual(graph.entities[n.id].loc, base.entities[n.id].loc);
-	            });
-	        };
+	      if (!isNaN(width)) style["stroke-width"] = width * 96 / 25.4;
+	    }
+	  }
 
-	        // enter/update
-	        targets.enter()
-	            .append('path')
-	            .merge(targets)
-	            .attr('d', getPath)
-	            .attr('class', function(d) { return 'way area target target-allowed ' + targetClass + d.id; })
-	            .classed('segment-edited', segmentWasEdited);
-
-
-	        // NOPE
-	        var nopeData = data.nopes.filter(getPath);
-	        var nopes = selection.selectAll('.area.target-nope')
-	            .filter(function(d) { return filter(d.properties.entity); })
-	            .data(nopeData, function key(d) { return d.id; });
-
-	        // exit
-	        nopes.exit()
-	            .remove();
-
-	        // enter/update
-	        nopes.enter()
-	            .append('path')
-	            .merge(nopes)
-	            .attr('d', getPath)
-	            .attr('class', function(d) { return 'way area target target-nope ' + nopeClass + d.id; })
-	            .classed('segment-edited', segmentWasEdited);
-	    }
-
-
-	    function drawAreas(selection, graph, entities, filter) {
-	        var path = svgPath(projection, graph, true);
-	        var areas = {};
-	        var multipolygon;
-	        var base = context.history().base();
-
-	        for (var i = 0; i < entities.length; i++) {
-	            var entity = entities[i];
-	            if (entity.geometry(graph) !== 'area') { continue; }
-
-	            multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
-	            if (multipolygon) {
-	                areas[multipolygon.id] = {
-	                    entity: multipolygon.mergeTags(entity.tags),
-	                    area: Math.abs(entity.area(graph))
-	                };
-	            } else if (!areas[entity.id]) {
-	                areas[entity.id] = {
-	                    entity: entity,
-	                    area: Math.abs(entity.area(graph))
-	                };
-	            }
-	        }
+	  return style;
+	} // get the contents of multiple text nodes, if present
 
-	        var fills = Object.values(areas).filter(function hasPath(a) { return path(a.entity); });
-	        fills.sort(function areaSort(a, b) { return b.area - a.area; });
-	        fills = fills.map(function(a) { return a.entity; });
 
-	        var strokes = fills.filter(function(area) { return area.type === 'way'; });
+	function getMulti(x, ys) {
+	  var o = {};
+	  var n;
+	  var k;
 
-	        var data = {
-	            clip: fills,
-	            shadow: strokes,
-	            stroke: strokes,
-	            fill: fills
-	        };
+	  for (k = 0; k < ys.length; k++) {
+	    n = get1(x, ys[k]);
+	    if (n) o[ys[k]] = nodeVal(n);
+	  }
 
-	        var clipPaths = context.surface().selectAll('defs').selectAll('.clipPath-osm')
-	           .filter(filter)
-	           .data(data.clip, osmEntity.key);
+	  return o;
+	}
 
-	        clipPaths.exit()
-	           .remove();
+	function getProperties$1(node) {
+	  var prop = getMulti(node, ["name", "cmt", "desc", "type", "time", "keywords"]); // Parse additional data from our Garmin extension(s)
 
-	        var clipPathsEnter = clipPaths.enter()
-	           .append('clipPath')
-	           .attr('class', 'clipPath-osm')
-	           .attr('id', function(entity) { return 'ideditor-' + entity.id + '-clippath'; });
+	  var extensions = node.getElementsByTagNameNS("http://www.garmin.com/xmlschemas/GpxExtensions/v3", "*");
 
-	        clipPathsEnter
-	           .append('path');
+	  for (var i = 0; i < extensions.length; i++) {
+	    var extension = extensions[i]; // Ignore nested extensions, like those on routepoints or trackpoints
 
-	        clipPaths.merge(clipPathsEnter)
-	           .selectAll('path')
-	           .attr('d', path);
+	    if (extension.parentNode.parentNode === node) {
+	      prop[extension.tagName.replace(":", "_")] = nodeVal(extension);
+	    }
+	  }
 
+	  var links = node.getElementsByTagName("link");
+	  if (links.length) prop.links = [];
 
-	        var drawLayer = selection.selectAll('.layer-osm.areas');
-	        var touchLayer = selection.selectAll('.layer-touch.areas');
+	  for (var _i = 0; _i < links.length; _i++) {
+	    prop.links.push(Object.assign({
+	      href: links[_i].getAttribute("href")
+	    }, getMulti(links[_i], ["text", "type"])));
+	  }
 
-	        // Draw areas..
-	        var areagroup = drawLayer
-	            .selectAll('g.areagroup')
-	            .data(['fill', 'shadow', 'stroke']);
+	  return prop;
+	}
 
-	        areagroup = areagroup.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'areagroup area-' + d; })
-	            .merge(areagroup);
+	function coordPair$1(x) {
+	  var ll = [parseFloat(x.getAttribute("lon")), parseFloat(x.getAttribute("lat"))];
+	  var ele = get1(x, "ele"); // handle namespaced attribute in browser
 
-	        var paths = areagroup
-	            .selectAll('path')
-	            .filter(filter)
-	            .data(function(layer) { return data[layer]; }, osmEntity.key);
+	  var heart = get1(x, "gpxtpx:hr") || get1(x, "hr");
+	  var time = get1(x, "time");
+	  var e;
 
-	        paths.exit()
-	            .remove();
+	  if (ele) {
+	    e = parseFloat(nodeVal(ele));
 
+	    if (!isNaN(e)) {
+	      ll.push(e);
+	    }
+	  }
 
-	        var fillpaths = selection.selectAll('.area-fill path.area').nodes();
-	        var bisect = d3_bisector(function(node) { return -node.__data__.area(graph); }).left;
+	  var result = {
+	    coordinates: ll,
+	    time: time ? nodeVal(time) : null,
+	    extendedValues: []
+	  };
 
-	        function sortedByArea(entity) {
-	            if (this._parent.__data__ === 'fill') {
-	                return fillpaths[bisect(fillpaths, -entity.area(graph))];
-	            }
-	        }
+	  if (heart) {
+	    result.extendedValues.push(["heart", parseFloat(nodeVal(heart))]);
+	  }
 
-	        paths = paths.enter()
-	            .insert('path', sortedByArea)
-	            .merge(paths)
-	            .each(function(entity) {
-	                var layer = this.parentNode.__data__;
-	                this.setAttribute('class', entity.type + ' area ' + layer + ' ' + entity.id);
+	  var extensions = get1(x, "extensions");
 
-	                if (layer === 'fill') {
-	                    this.setAttribute('clip-path', 'url(#ideditor-' + entity.id + '-clippath)');
-	                    this.style.fill = this.style.stroke = getPatternStyle(entity.tags);
-	                }
-	            })
-	            .classed('added', function(d) {
-	                return !base.entities[d.id];
-	            })
-	            .classed('geometry-edited', function(d) {
-	                return graph.entities[d.id] &&
-	                    base.entities[d.id] &&
-	                    !fastDeepEqual(graph.entities[d.id].nodes, base.entities[d.id].nodes);
-	            })
-	            .classed('retagged', function(d) {
-	                return graph.entities[d.id] &&
-	                    base.entities[d.id] &&
-	                    !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
-	            })
-	            .call(svgTagClasses())
-	            .attr('d', path);
-
-
-	        // Draw touch targets..
-	        touchLayer
-	            .call(drawTargets, graph, data.stroke, filter);
-	    }
-
-	    return drawAreas;
-	}
-
-	//[4]   	NameStartChar	   ::=   	":" | [A-Z] | "_" | [a-z] | [#xC0-#xD6] | [#xD8-#xF6] | [#xF8-#x2FF] | [#x370-#x37D] | [#x37F-#x1FFF] | [#x200C-#x200D] | [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] | [#xF900-#xFDCF] | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF]
-	//[4a]   	NameChar	   ::=   	NameStartChar | "-" | "." | [0-9] | #xB7 | [#x0300-#x036F] | [#x203F-#x2040]
-	//[5]   	Name	   ::=   	NameStartChar (NameChar)*
-	var nameStartChar = /[A-Z_a-z\xC0-\xD6\xD8-\xF6\u00F8-\u02FF\u0370-\u037D\u037F-\u1FFF\u200C-\u200D\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD]/;//\u10000-\uEFFFF
-	var nameChar = new RegExp("[\\-\\.0-9"+nameStartChar.source.slice(1,-1)+"\\u00B7\\u0300-\\u036F\\u203F-\\u2040]");
-	var tagNamePattern = new RegExp('^'+nameStartChar.source+nameChar.source+'*(?:\:'+nameStartChar.source+nameChar.source+'*)?$');
-	//var tagNamePattern = /^[a-zA-Z_][\w\-\.]*(?:\:[a-zA-Z_][\w\-\.]*)?$/
-	//var handlers = 'resolveEntity,getExternalSubset,characters,endDocument,endElement,endPrefixMapping,ignorableWhitespace,processingInstruction,setDocumentLocator,skippedEntity,startDocument,startElement,startPrefixMapping,notationDecl,unparsedEntityDecl,error,fatalError,warning,attributeDecl,elementDecl,externalEntityDecl,internalEntityDecl,comment,endCDATA,endDTD,endEntity,startCDATA,startDTD,startEntity'.split(',')
-
-	//S_TAG,	S_ATTR,	S_EQ,	S_ATTR_NOQUOT_VALUE
-	//S_ATTR_SPACE,	S_ATTR_END,	S_TAG_SPACE, S_TAG_CLOSE
-	var S_TAG = 0;//tag name offerring
-	var S_ATTR = 1;//attr name offerring 
-	var S_ATTR_SPACE=2;//attr name end and space offer
-	var S_EQ = 3;//=space?
-	var S_ATTR_NOQUOT_VALUE = 4;//attr value(no quot value only)
-	var S_ATTR_END = 5;//attr value end and no space(quot end)
-	var S_TAG_SPACE = 6;//(attr value end || tag end ) && (space offer)
-	var S_TAG_CLOSE = 7;//closed el<el />
-
-	function XMLReader(){
-		
-	}
-
-	XMLReader.prototype = {
-		parse:function(source,defaultNSMap,entityMap){
-			var domBuilder = this.domBuilder;
-			domBuilder.startDocument();
-			_copy(defaultNSMap ,defaultNSMap = {});
-			parse(source,defaultNSMap,entityMap,
-					domBuilder,this.errorHandler);
-			domBuilder.endDocument();
-		}
-	};
-	function parse(source,defaultNSMapCopy,entityMap,domBuilder,errorHandler){
-		function fixedFromCharCode(code) {
-			// String.prototype.fromCharCode does not supports
-			// > 2 bytes unicode chars directly
-			if (code > 0xffff) {
-				code -= 0x10000;
-				var surrogate1 = 0xd800 + (code >> 10)
-					, surrogate2 = 0xdc00 + (code & 0x3ff);
-
-				return String.fromCharCode(surrogate1, surrogate2);
-			} else {
-				return String.fromCharCode(code);
-			}
-		}
-		function entityReplacer(a){
-			var k = a.slice(1,-1);
-			if(k in entityMap){
-				return entityMap[k]; 
-			}else if(k.charAt(0) === '#'){
-				return fixedFromCharCode(parseInt(k.substr(1).replace('x','0x')))
-			}else {
-				errorHandler.error('entity not found:'+a);
-				return a;
-			}
-		}
-		function appendText(end){//has some bugs
-			if(end>start){
-				var xt = source.substring(start,end).replace(/&#?\w+;/g,entityReplacer);
-				locator&&position(start);
-				domBuilder.characters(xt,0,end-start);
-				start = end;
-			}
-		}
-		function position(p,m){
-			while(p>=lineEnd && (m = linePattern.exec(source))){
-				lineStart = m.index;
-				lineEnd = lineStart + m[0].length;
-				locator.lineNumber++;
-				//console.log('line++:',locator,startPos,endPos)
-			}
-			locator.columnNumber = p-lineStart+1;
-		}
-		var lineStart = 0;
-		var lineEnd = 0;
-		var linePattern = /.*(?:\r\n?|\n)|.*$/g;
-		var locator = domBuilder.locator;
-		
-		var parseStack = [{currentNSMap:defaultNSMapCopy}];
-		var closeMap = {};
-		var start = 0;
-		while(true){
-			try{
-				var tagStart = source.indexOf('<',start);
-				if(tagStart<0){
-					if(!source.substr(start).match(/^\s*$/)){
-						var doc = domBuilder.doc;
-		    			var text = doc.createTextNode(source.substr(start));
-		    			doc.appendChild(text);
-		    			domBuilder.currentElement = text;
-					}
-					return;
-				}
-				if(tagStart>start){
-					appendText(tagStart);
-				}
-				switch(source.charAt(tagStart+1)){
-				case '/':
-					var end = source.indexOf('>',tagStart+3);
-					var tagName = source.substring(tagStart+2,end);
-					var config = parseStack.pop();
-					if(end<0){
-						
-		        		tagName = source.substring(tagStart+2).replace(/[\s<].*/,'');
-		        		//console.error('#@@@@@@'+tagName)
-		        		errorHandler.error("end tag name: "+tagName+' is not complete:'+config.tagName);
-		        		end = tagStart+1+tagName.length;
-		        	}else if(tagName.match(/\s</)){
-		        		tagName = tagName.replace(/[\s<].*/,'');
-		        		errorHandler.error("end tag name: "+tagName+' maybe not complete');
-		        		end = tagStart+1+tagName.length;
-					}
-					//console.error(parseStack.length,parseStack)
-					//console.error(config);
-					var localNSMap = config.localNSMap;
-					var endMatch = config.tagName == tagName;
-					var endIgnoreCaseMach = endMatch || config.tagName&&config.tagName.toLowerCase() == tagName.toLowerCase();
-			        if(endIgnoreCaseMach){
-			        	domBuilder.endElement(config.uri,config.localName,tagName);
-						if(localNSMap){
-							for(var prefix in localNSMap){
-								domBuilder.endPrefixMapping(prefix) ;
-							}
-						}
-						if(!endMatch){
-			            	errorHandler.fatalError("end tag name: "+tagName+' is not match the current start tagName:'+config.tagName );
-						}
-			        }else {
-			        	parseStack.push(config);
-			        }
-					
-					end++;
-					break;
-					// end elment
-				case '?':// <?...?>
-					locator&&position(tagStart);
-					end = parseInstruction(source,tagStart,domBuilder);
-					break;
-				case '!':// <!doctype,<![CDATA,<!--
-					locator&&position(tagStart);
-					end = parseDCC(source,tagStart,domBuilder,errorHandler);
-					break;
-				default:
-					locator&&position(tagStart);
-					var el = new ElementAttributes();
-					var currentNSMap = parseStack[parseStack.length-1].currentNSMap;
-					//elStartEnd
-					var end = parseElementStartPart(source,tagStart,el,currentNSMap,entityReplacer,errorHandler);
-					var len = el.length;
-					
-					
-					if(!el.closed && fixSelfClosed(source,end,el.tagName,closeMap)){
-						el.closed = true;
-						if(!entityMap.nbsp){
-							errorHandler.warning('unclosed xml attribute');
-						}
-					}
-					if(locator && len){
-						var locator2 = copyLocator(locator,{});
-						//try{//attribute position fixed
-						for(var i = 0;i<len;i++){
-							var a = el[i];
-							position(a.offset);
-							a.locator = copyLocator(locator,{});
-						}
-						//}catch(e){console.error('@@@@@'+e)}
-						domBuilder.locator = locator2;
-						if(appendElement(el,domBuilder,currentNSMap)){
-							parseStack.push(el);
-						}
-						domBuilder.locator = locator;
-					}else {
-						if(appendElement(el,domBuilder,currentNSMap)){
-							parseStack.push(el);
-						}
-					}
-					
-					
-					
-					if(el.uri === 'http://www.w3.org/1999/xhtml' && !el.closed){
-						end = parseHtmlSpecialContent(source,end,el.tagName,entityReplacer,domBuilder);
-					}else {
-						end++;
-					}
-				}
-			}catch(e){
-				errorHandler.error('element parse error: '+e);
-				//errorHandler.error('element parse error: '+e);
-				end = -1;
-				//throw e;
-			}
-			if(end>start){
-				start = end;
-			}else {
-				//TODO: 这里有可能sax回退，有位置错误风险
-				appendText(Math.max(tagStart,start)+1);
-			}
-		}
-	}
-	function copyLocator(f,t){
-		t.lineNumber = f.lineNumber;
-		t.columnNumber = f.columnNumber;
-		return t;
-	}
+	  if (extensions !== null) {
+	    for (var _i2 = 0, _arr = ["speed", "course", "hAcc", "vAcc"]; _i2 < _arr.length; _i2++) {
+	      var name = _arr[_i2];
+	      var v = parseFloat(nodeVal(get1(extensions, name)));
 
-	/**
-	 * @see #appendElement(source,elStartEnd,el,selfClosed,entityReplacer,domBuilder,parseStack);
-	 * @return end of the elementStartPart(end of elementEndPart for selfClosed el)
-	 */
-	function parseElementStartPart(source,start,el,currentNSMap,entityReplacer,errorHandler){
-		var attrName;
-		var value;
-		var p = ++start;
-		var s = S_TAG;//status
-		while(true){
-			var c = source.charAt(p);
-			switch(c){
-			case '=':
-				if(s === S_ATTR){//attrName
-					attrName = source.slice(start,p);
-					s = S_EQ;
-				}else if(s === S_ATTR_SPACE){
-					s = S_EQ;
-				}else {
-					//fatalError: equal must after attrName or space after attrName
-					throw new Error('attribute equal must after attrName');
-				}
-				break;
-			case '\'':
-			case '"':
-				if(s === S_EQ || s === S_ATTR //|| s == S_ATTR_SPACE
-					){//equal
-					if(s === S_ATTR){
-						errorHandler.warning('attribute value must after "="');
-						attrName = source.slice(start,p);
-					}
-					start = p+1;
-					p = source.indexOf(c,start);
-					if(p>0){
-						value = source.slice(start,p).replace(/&#?\w+;/g,entityReplacer);
-						el.add(attrName,value,start-1);
-						s = S_ATTR_END;
-					}else {
-						//fatalError: no end quot match
-						throw new Error('attribute value no end \''+c+'\' match');
-					}
-				}else if(s == S_ATTR_NOQUOT_VALUE){
-					value = source.slice(start,p).replace(/&#?\w+;/g,entityReplacer);
-					//console.log(attrName,value,start,p)
-					el.add(attrName,value,start);
-					//console.dir(el)
-					errorHandler.warning('attribute "'+attrName+'" missed start quot('+c+')!!');
-					start = p+1;
-					s = S_ATTR_END;
-				}else {
-					//fatalError: no equal before
-					throw new Error('attribute value must after "="');
-				}
-				break;
-			case '/':
-				switch(s){
-				case S_TAG:
-					el.setTagName(source.slice(start,p));
-				case S_ATTR_END:
-				case S_TAG_SPACE:
-				case S_TAG_CLOSE:
-					s =S_TAG_CLOSE;
-					el.closed = true;
-				case S_ATTR_NOQUOT_VALUE:
-				case S_ATTR:
-				case S_ATTR_SPACE:
-					break;
-				//case S_EQ:
-				default:
-					throw new Error("attribute invalid close char('/')")
-				}
-				break;
-			case ''://end document
-				//throw new Error('unexpected end of input')
-				errorHandler.error('unexpected end of input');
-				if(s == S_TAG){
-					el.setTagName(source.slice(start,p));
-				}
-				return p;
-			case '>':
-				switch(s){
-				case S_TAG:
-					el.setTagName(source.slice(start,p));
-				case S_ATTR_END:
-				case S_TAG_SPACE:
-				case S_TAG_CLOSE:
-					break;//normal
-				case S_ATTR_NOQUOT_VALUE://Compatible state
-				case S_ATTR:
-					value = source.slice(start,p);
-					if(value.slice(-1) === '/'){
-						el.closed  = true;
-						value = value.slice(0,-1);
-					}
-				case S_ATTR_SPACE:
-					if(s === S_ATTR_SPACE){
-						value = attrName;
-					}
-					if(s == S_ATTR_NOQUOT_VALUE){
-						errorHandler.warning('attribute "'+value+'" missed quot(")!!');
-						el.add(attrName,value.replace(/&#?\w+;/g,entityReplacer),start);
-					}else {
-						if(currentNSMap[''] !== 'http://www.w3.org/1999/xhtml' || !value.match(/^(?:disabled|checked|selected)$/i)){
-							errorHandler.warning('attribute "'+value+'" missed value!! "'+value+'" instead!!');
-						}
-						el.add(value,value,start);
-					}
-					break;
-				case S_EQ:
-					throw new Error('attribute value missed!!');
-				}
-	//			console.log(tagName,tagNamePattern,tagNamePattern.test(tagName))
-				return p;
-			/*xml space '\x20' | #x9 | #xD | #xA; */
-			case '\u0080':
-				c = ' ';
-			default:
-				if(c<= ' '){//space
-					switch(s){
-					case S_TAG:
-						el.setTagName(source.slice(start,p));//tagName
-						s = S_TAG_SPACE;
-						break;
-					case S_ATTR:
-						attrName = source.slice(start,p);
-						s = S_ATTR_SPACE;
-						break;
-					case S_ATTR_NOQUOT_VALUE:
-						var value = source.slice(start,p).replace(/&#?\w+;/g,entityReplacer);
-						errorHandler.warning('attribute "'+value+'" missed quot(")!!');
-						el.add(attrName,value,start);
-					case S_ATTR_END:
-						s = S_TAG_SPACE;
-						break;
-					//case S_TAG_SPACE:
-					//case S_EQ:
-					//case S_ATTR_SPACE:
-					//	void();break;
-					//case S_TAG_CLOSE:
-						//ignore warning
-					}
-				}else {//not space
-	//S_TAG,	S_ATTR,	S_EQ,	S_ATTR_NOQUOT_VALUE
-	//S_ATTR_SPACE,	S_ATTR_END,	S_TAG_SPACE, S_TAG_CLOSE
-					switch(s){
-					//case S_TAG:void();break;
-					//case S_ATTR:void();break;
-					//case S_ATTR_NOQUOT_VALUE:void();break;
-					case S_ATTR_SPACE:
-						var tagName =  el.tagName;
-						if(currentNSMap[''] !== 'http://www.w3.org/1999/xhtml' || !attrName.match(/^(?:disabled|checked|selected)$/i)){
-							errorHandler.warning('attribute "'+attrName+'" missed value!! "'+attrName+'" instead2!!');
-						}
-						el.add(attrName,attrName,start);
-						start = p;
-						s = S_ATTR;
-						break;
-					case S_ATTR_END:
-						errorHandler.warning('attribute space is required"'+attrName+'"!!');
-					case S_TAG_SPACE:
-						s = S_ATTR;
-						start = p;
-						break;
-					case S_EQ:
-						s = S_ATTR_NOQUOT_VALUE;
-						start = p;
-						break;
-					case S_TAG_CLOSE:
-						throw new Error("elements closed character '/' and '>' must be connected to");
-					}
-				}
-			}//end outer switch
-			//console.log('p++',p)
-			p++;
-		}
+	      if (!isNaN(v)) {
+	        result.extendedValues.push([name, v]);
+	      }
+	    }
+	  }
+
+	  return result;
 	}
-	/**
-	 * @return true if has new namespace define
-	 */
-	function appendElement(el,domBuilder,currentNSMap){
-		var tagName = el.tagName;
-		var localNSMap = null;
-		//var currentNSMap = parseStack[parseStack.length-1].currentNSMap;
-		var i = el.length;
-		while(i--){
-			var a = el[i];
-			var qName = a.qName;
-			var value = a.value;
-			var nsp = qName.indexOf(':');
-			if(nsp>0){
-				var prefix = a.prefix = qName.slice(0,nsp);
-				var localName = qName.slice(nsp+1);
-				var nsPrefix = prefix === 'xmlns' && localName;
-			}else {
-				localName = qName;
-				prefix = null;
-				nsPrefix = qName === 'xmlns' && '';
-			}
-			//can not set prefix,because prefix !== ''
-			a.localName = localName ;
-			//prefix == null for no ns prefix attribute 
-			if(nsPrefix !== false){//hack!!
-				if(localNSMap == null){
-					localNSMap = {};
-					//console.log(currentNSMap,0)
-					_copy(currentNSMap,currentNSMap={});
-					//console.log(currentNSMap,1)
-				}
-				currentNSMap[nsPrefix] = localNSMap[nsPrefix] = value;
-				a.uri = 'http://www.w3.org/2000/xmlns/';
-				domBuilder.startPrefixMapping(nsPrefix, value); 
-			}
-		}
-		var i = el.length;
-		while(i--){
-			a = el[i];
-			var prefix = a.prefix;
-			if(prefix){//no prefix attribute has no namespace
-				if(prefix === 'xml'){
-					a.uri = 'http://www.w3.org/XML/1998/namespace';
-				}if(prefix !== 'xmlns'){
-					a.uri = currentNSMap[prefix || ''];
-					
-					//{console.log('###'+a.qName,domBuilder.locator.systemId+'',currentNSMap,a.uri)}
-				}
-			}
-		}
-		var nsp = tagName.indexOf(':');
-		if(nsp>0){
-			prefix = el.prefix = tagName.slice(0,nsp);
-			localName = el.localName = tagName.slice(nsp+1);
-		}else {
-			prefix = null;//important!!
-			localName = el.localName = tagName;
-		}
-		//no prefix element has default namespace
-		var ns = el.uri = currentNSMap[prefix || ''];
-		domBuilder.startElement(ns,localName,tagName,el);
-		//endPrefixMapping and startPrefixMapping have not any help for dom builder
-		//localNSMap = null
-		if(el.closed){
-			domBuilder.endElement(ns,localName,tagName);
-			if(localNSMap){
-				for(prefix in localNSMap){
-					domBuilder.endPrefixMapping(prefix); 
-				}
-			}
-		}else {
-			el.currentNSMap = currentNSMap;
-			el.localNSMap = localNSMap;
-			//parseStack.push(el);
-			return true;
-		}
-	}
-	function parseHtmlSpecialContent(source,elStartEnd,tagName,entityReplacer,domBuilder){
-		if(/^(?:script|textarea)$/i.test(tagName)){
-			var elEndStart =  source.indexOf('</'+tagName+'>',elStartEnd);
-			var text = source.substring(elStartEnd+1,elEndStart);
-			if(/[&<]/.test(text)){
-				if(/^script$/i.test(tagName)){
-					//if(!/\]\]>/.test(text)){
-						//lexHandler.startCDATA();
-						domBuilder.characters(text,0,text.length);
-						//lexHandler.endCDATA();
-						return elEndStart;
-					//}
-				}//}else{//text area
-					text = text.replace(/&#?\w+;/g,entityReplacer);
-					domBuilder.characters(text,0,text.length);
-					return elEndStart;
-				//}
-				
-			}
-		}
-		return elStartEnd+1;
-	}
-	function fixSelfClosed(source,elStartEnd,tagName,closeMap){
-		//if(tagName in closeMap){
-		var pos = closeMap[tagName];
-		if(pos == null){
-			//console.log(tagName)
-			pos =  source.lastIndexOf('</'+tagName+'>');
-			if(pos<elStartEnd){//忘记闭合
-				pos = source.lastIndexOf('</'+tagName);
-			}
-			closeMap[tagName] =pos;
-		}
-		return pos<elStartEnd;
-		//} 
-	}
-	function _copy(source,target){
-		for(var n in source){target[n] = source[n];}
-	}
-	function parseDCC(source,start,domBuilder,errorHandler){//sure start with '<!'
-		var next= source.charAt(start+2);
-		switch(next){
-		case '-':
-			if(source.charAt(start + 3) === '-'){
-				var end = source.indexOf('-->',start+4);
-				//append comment source.substring(4,end)//<!--
-				if(end>start){
-					domBuilder.comment(source,start+4,end-start-4);
-					return end+3;
-				}else {
-					errorHandler.error("Unclosed comment");
-					return -1;
-				}
-			}else {
-				//error
-				return -1;
-			}
-		default:
-			if(source.substr(start+3,6) == 'CDATA['){
-				var end = source.indexOf(']]>',start+9);
-				domBuilder.startCDATA();
-				domBuilder.characters(source,start+9,end-start-9);
-				domBuilder.endCDATA(); 
-				return end+3;
-			}
-			//<!DOCTYPE
-			//startDTD(java.lang.String name, java.lang.String publicId, java.lang.String systemId) 
-			var matchs = split(source,start);
-			var len = matchs.length;
-			if(len>1 && /!doctype/i.test(matchs[0][0])){
-				var name = matchs[1][0];
-				var pubid = len>3 && /^public$/i.test(matchs[2][0]) && matchs[3][0];
-				var sysid = len>4 && matchs[4][0];
-				var lastMatch = matchs[len-1];
-				domBuilder.startDTD(name,pubid && pubid.replace(/^(['"])(.*?)\1$/,'$2'),
-						sysid && sysid.replace(/^(['"])(.*?)\1$/,'$2'));
-				domBuilder.endDTD();
-				
-				return lastMatch.index+lastMatch[0].length
-			}
-		}
-		return -1;
-	}
-
-
-
-	function parseInstruction(source,start,domBuilder){
-		var end = source.indexOf('?>',start);
-		if(end){
-			var match = source.substring(start,end).match(/^<\?(\S*)\s*([\s\S]*?)\s*$/);
-			if(match){
-				var len = match[0].length;
-				domBuilder.processingInstruction(match[1], match[2]) ;
-				return end+2;
-			}else {//error
-				return -1;
-			}
-		}
-		return -1;
+
+	function getRoute(node) {
+	  var line = getPoints$1(node, "rtept");
+	  if (!line) return;
+	  return {
+	    type: "Feature",
+	    properties: Object.assign(getProperties$1(node), getLineStyle(get1(node, "extensions")), {
+	      _gpxType: "rte"
+	    }),
+	    geometry: {
+	      type: "LineString",
+	      coordinates: line.line
+	    }
+	  };
 	}
 
-	/**
-	 * @param source
-	 */
-	function ElementAttributes(source){
-		
-	}
-	ElementAttributes.prototype = {
-		setTagName:function(tagName){
-			if(!tagNamePattern.test(tagName)){
-				throw new Error('invalid tagName:'+tagName)
-			}
-			this.tagName = tagName;
-		},
-		add:function(qName,value,offset){
-			if(!tagNamePattern.test(qName)){
-				throw new Error('invalid attribute:'+qName)
-			}
-			this[this.length++] = {qName:qName,value:value,offset:offset};
-		},
-		length:0,
-		getLocalName:function(i){return this[i].localName},
-		getLocator:function(i){return this[i].locator},
-		getQName:function(i){return this[i].qName},
-		getURI:function(i){return this[i].uri},
-		getValue:function(i){return this[i].value}
-	//	,getIndex:function(uri, localName)){
-	//		if(localName){
-	//			
-	//		}else{
-	//			var qName = uri
-	//		}
-	//	},
-	//	getValue:function(){return this.getValue(this.getIndex.apply(this,arguments))},
-	//	getType:function(uri,localName){}
-	//	getType:function(i){},
-	};
+	function getPoints$1(node, pointname) {
+	  var pts = node.getElementsByTagName(pointname);
+	  if (pts.length < 2) return; // Invalid line in GeoJSON
+
+	  var line = [];
+	  var times = [];
+	  var extendedValues = {};
 
+	  for (var i = 0; i < pts.length; i++) {
+	    var c = coordPair$1(pts[i]);
+	    line.push(c.coordinates);
+	    if (c.time) times.push(c.time);
 
+	    for (var j = 0; j < c.extendedValues.length; j++) {
+	      var _c$extendedValues$j = _slicedToArray(c.extendedValues[j], 2),
+	          name = _c$extendedValues$j[0],
+	          val = _c$extendedValues$j[1];
 
+	      var plural = name === "heart" ? name : name + "s";
 
-	function _set_proto_(thiz,parent){
-		thiz.__proto__ = parent;
-		return thiz;
-	}
-	if(!(_set_proto_({},_set_proto_.prototype) instanceof _set_proto_)){
-		_set_proto_ = function(thiz,parent){
-			function p(){}		p.prototype = parent;
-			p = new p();
-			for(parent in thiz){
-				p[parent] = thiz[parent];
-			}
-			return p;
-		};
-	}
+	      if (!extendedValues[plural]) {
+	        extendedValues[plural] = Array(pts.length).fill(null);
+	      }
 
-	function split(source,start){
-		var match;
-		var buf = [];
-		var reg = /'[^']+'|"[^"]+"|[^\s<>\/=]+=?|(\/?\s*>|<)/g;
-		reg.lastIndex = start;
-		reg.exec(source);//skip <
-		while(match = reg.exec(source)){
-			buf.push(match);
-			if(match[1]){ return buf; }
-		}
+	      extendedValues[plural][i] = val;
+	    }
+	  }
+
+	  return {
+	    line: line,
+	    times: times,
+	    extendedValues: extendedValues
+	  };
 	}
 
-	var XMLReader_1 = XMLReader;
+	function getTrack(node) {
+	  var segments = node.getElementsByTagName("trkseg");
+	  var track = [];
+	  var times = [];
+	  var extractedLines = [];
 
-	var sax = {
-		XMLReader: XMLReader_1
-	};
+	  for (var i = 0; i < segments.length; i++) {
+	    var line = getPoints$1(segments[i], "trkpt");
 
-	/*
-	 * DOM Level 2
-	 * Object DOMException
-	 * @see http://www.w3.org/TR/REC-DOM-Level-1/ecma-script-language-binding.html
-	 * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/ecma-script-binding.html
-	 */
+	    if (line) {
+	      extractedLines.push(line);
+	      if (line.times && line.times.length) times.push(line.times);
+	    }
+	  }
 
-	function copy$2(src,dest){
-		for(var p in src){
-			dest[p] = src[p];
-		}
-	}
-	/**
-	^\w+\.prototype\.([_\w]+)\s*=\s*((?:.*\{\s*?[\r\n][\s\S]*?^})|\S.*?(?=[;\r\n]));?
-	^\w+\.prototype\.([_\w]+)\s*=\s*(\S.*?(?=[;\r\n]));?
-	 */
-	function _extends(Class,Super){
-		var pt = Class.prototype;
-		if(Object.create){
-			var ppt = Object.create(Super.prototype);
-			pt.__proto__ = ppt;
-		}
-		if(!(pt instanceof Super)){
-			function t(){}		t.prototype = Super.prototype;
-			t = new t();
-			copy$2(pt,t);
-			Class.prototype = pt = t;
-		}
-		if(pt.constructor != Class){
-			if(typeof Class != 'function'){
-				console.error("unknow Class:"+Class);
-			}
-			pt.constructor = Class;
-		}
-	}
-	var htmlns = 'http://www.w3.org/1999/xhtml' ;
-	// Node Types
-	var NodeType = {};
-	var ELEMENT_NODE                = NodeType.ELEMENT_NODE                = 1;
-	var ATTRIBUTE_NODE              = NodeType.ATTRIBUTE_NODE              = 2;
-	var TEXT_NODE                   = NodeType.TEXT_NODE                   = 3;
-	var CDATA_SECTION_NODE          = NodeType.CDATA_SECTION_NODE          = 4;
-	var ENTITY_REFERENCE_NODE       = NodeType.ENTITY_REFERENCE_NODE       = 5;
-	var ENTITY_NODE                 = NodeType.ENTITY_NODE                 = 6;
-	var PROCESSING_INSTRUCTION_NODE = NodeType.PROCESSING_INSTRUCTION_NODE = 7;
-	var COMMENT_NODE                = NodeType.COMMENT_NODE                = 8;
-	var DOCUMENT_NODE               = NodeType.DOCUMENT_NODE               = 9;
-	var DOCUMENT_TYPE_NODE          = NodeType.DOCUMENT_TYPE_NODE          = 10;
-	var DOCUMENT_FRAGMENT_NODE      = NodeType.DOCUMENT_FRAGMENT_NODE      = 11;
-	var NOTATION_NODE               = NodeType.NOTATION_NODE               = 12;
-
-	// ExceptionCode
-	var ExceptionCode = {};
-	var ExceptionMessage = {};
-	var INDEX_SIZE_ERR              = ExceptionCode.INDEX_SIZE_ERR              = ((ExceptionMessage[1]="Index size error"),1);
-	var DOMSTRING_SIZE_ERR          = ExceptionCode.DOMSTRING_SIZE_ERR          = ((ExceptionMessage[2]="DOMString size error"),2);
-	var HIERARCHY_REQUEST_ERR       = ExceptionCode.HIERARCHY_REQUEST_ERR       = ((ExceptionMessage[3]="Hierarchy request error"),3);
-	var WRONG_DOCUMENT_ERR          = ExceptionCode.WRONG_DOCUMENT_ERR          = ((ExceptionMessage[4]="Wrong document"),4);
-	var INVALID_CHARACTER_ERR       = ExceptionCode.INVALID_CHARACTER_ERR       = ((ExceptionMessage[5]="Invalid character"),5);
-	var NO_DATA_ALLOWED_ERR         = ExceptionCode.NO_DATA_ALLOWED_ERR         = ((ExceptionMessage[6]="No data allowed"),6);
-	var NO_MODIFICATION_ALLOWED_ERR = ExceptionCode.NO_MODIFICATION_ALLOWED_ERR = ((ExceptionMessage[7]="No modification allowed"),7);
-	var NOT_FOUND_ERR               = ExceptionCode.NOT_FOUND_ERR               = ((ExceptionMessage[8]="Not found"),8);
-	var NOT_SUPPORTED_ERR           = ExceptionCode.NOT_SUPPORTED_ERR           = ((ExceptionMessage[9]="Not supported"),9);
-	var INUSE_ATTRIBUTE_ERR         = ExceptionCode.INUSE_ATTRIBUTE_ERR         = ((ExceptionMessage[10]="Attribute in use"),10);
-	//level2
-	var INVALID_STATE_ERR        	= ExceptionCode.INVALID_STATE_ERR        	= ((ExceptionMessage[11]="Invalid state"),11);
-	var SYNTAX_ERR               	= ExceptionCode.SYNTAX_ERR               	= ((ExceptionMessage[12]="Syntax error"),12);
-	var INVALID_MODIFICATION_ERR 	= ExceptionCode.INVALID_MODIFICATION_ERR 	= ((ExceptionMessage[13]="Invalid modification"),13);
-	var NAMESPACE_ERR            	= ExceptionCode.NAMESPACE_ERR           	= ((ExceptionMessage[14]="Invalid namespace"),14);
-	var INVALID_ACCESS_ERR       	= ExceptionCode.INVALID_ACCESS_ERR      	= ((ExceptionMessage[15]="Invalid access"),15);
-
-
-	function DOMException$2(code, message) {
-		if(message instanceof Error){
-			var error = message;
-		}else {
-			error = this;
-			Error.call(this, ExceptionMessage[code]);
-			this.message = ExceptionMessage[code];
-			if(Error.captureStackTrace) { Error.captureStackTrace(this, DOMException$2); }
-		}
-		error.code = code;
-		if(message) { this.message = this.message + ": " + message; }
-		return error;
-	}DOMException$2.prototype = Error.prototype;
-	copy$2(ExceptionCode,DOMException$2);
-	/**
-	 * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-536297177
-	 * The NodeList interface provides the abstraction of an ordered collection of nodes, without defining or constraining how this collection is implemented. NodeList objects in the DOM are live.
-	 * The items in the NodeList are accessible via an integral index, starting from 0.
-	 */
-	function NodeList() {
-	}NodeList.prototype = {
-		/**
-		 * The number of nodes in the list. The range of valid child node indices is 0 to length-1 inclusive.
-		 * @standard level1
-		 */
-		length:0, 
-		/**
-		 * Returns the indexth item in the collection. If index is greater than or equal to the number of nodes in the list, this returns null.
-		 * @standard level1
-		 * @param index  unsigned long 
-		 *   Index into the collection.
-		 * @return Node
-		 * 	The node at the indexth position in the NodeList, or null if that is not a valid index. 
-		 */
-		item: function(index) {
-			return this[index] || null;
-		},
-		toString:function(isHTML,nodeFilter){
-			for(var buf = [], i = 0;i<this.length;i++){
-				serializeToString(this[i],buf,isHTML,nodeFilter);
-			}
-			return buf.join('');
-		}
-	};
-	function LiveNodeList(node,refresh){
-		this._node = node;
-		this._refresh = refresh;
-		_updateLiveList(this);
-	}
-	function _updateLiveList(list){
-		var inc = list._node._inc || list._node.ownerDocument._inc;
-		if(list._inc != inc){
-			var ls = list._refresh(list._node);
-			//console.log(ls.length)
-			__set__(list,'length',ls.length);
-			copy$2(ls,list);
-			list._inc = inc;
-		}
-	}
-	LiveNodeList.prototype.item = function(i){
-		_updateLiveList(this);
-		return this[i];
-	};
+	  if (extractedLines.length === 0) return;
+	  var multi = extractedLines.length > 1;
+	  var properties = Object.assign(getProperties$1(node), getLineStyle(get1(node, "extensions")), {
+	    _gpxType: "trk"
+	  }, times.length ? {
+	    coordinateProperties: {
+	      times: multi ? times : times[0]
+	    }
+	  } : {});
 
-	_extends(LiveNodeList,NodeList);
-	/**
-	 * 
-	 * Objects implementing the NamedNodeMap interface are used to represent collections of nodes that can be accessed by name. Note that NamedNodeMap does not inherit from NodeList; NamedNodeMaps are not maintained in any particular order. Objects contained in an object implementing NamedNodeMap may also be accessed by an ordinal index, but this is simply to allow convenient enumeration of the contents of a NamedNodeMap, and does not imply that the DOM specifies an order to these Nodes.
-	 * NamedNodeMap objects in the DOM are live.
-	 * used for attributes or DocumentType entities 
-	 */
-	function NamedNodeMap() {
-	}
-	function _findNodeIndex(list,node){
-		var i = list.length;
-		while(i--){
-			if(list[i] === node){return i}
-		}
-	}
-
-	function _addNamedNode(el,list,newAttr,oldAttr){
-		if(oldAttr){
-			list[_findNodeIndex(list,oldAttr)] = newAttr;
-		}else {
-			list[list.length++] = newAttr;
-		}
-		if(el){
-			newAttr.ownerElement = el;
-			var doc = el.ownerDocument;
-			if(doc){
-				oldAttr && _onRemoveAttribute(doc,el,oldAttr);
-				_onAddAttribute(doc,el,newAttr);
-			}
-		}
-	}
-	function _removeNamedNode(el,list,attr){
-		//console.log('remove attr:'+attr)
-		var i = _findNodeIndex(list,attr);
-		if(i>=0){
-			var lastIndex = list.length-1;
-			while(i<lastIndex){
-				list[i] = list[++i];
-			}
-			list.length = lastIndex;
-			if(el){
-				var doc = el.ownerDocument;
-				if(doc){
-					_onRemoveAttribute(doc,el,attr);
-					attr.ownerElement = null;
-				}
-			}
-		}else {
-			throw DOMException$2(NOT_FOUND_ERR,new Error(el.tagName+'@'+attr))
-		}
-	}
-	NamedNodeMap.prototype = {
-		length:0,
-		item:NodeList.prototype.item,
-		getNamedItem: function(key) {
-	//		if(key.indexOf(':')>0 || key == 'xmlns'){
-	//			return null;
-	//		}
-			//console.log()
-			var i = this.length;
-			while(i--){
-				var attr = this[i];
-				//console.log(attr.nodeName,key)
-				if(attr.nodeName == key){
-					return attr;
-				}
-			}
-		},
-		setNamedItem: function(attr) {
-			var el = attr.ownerElement;
-			if(el && el!=this._ownerElement){
-				throw new DOMException$2(INUSE_ATTRIBUTE_ERR);
-			}
-			var oldAttr = this.getNamedItem(attr.nodeName);
-			_addNamedNode(this._ownerElement,this,attr,oldAttr);
-			return oldAttr;
-		},
-		/* returns Node */
-		setNamedItemNS: function(attr) {// raises: WRONG_DOCUMENT_ERR,NO_MODIFICATION_ALLOWED_ERR,INUSE_ATTRIBUTE_ERR
-			var el = attr.ownerElement, oldAttr;
-			if(el && el!=this._ownerElement){
-				throw new DOMException$2(INUSE_ATTRIBUTE_ERR);
-			}
-			oldAttr = this.getNamedItemNS(attr.namespaceURI,attr.localName);
-			_addNamedNode(this._ownerElement,this,attr,oldAttr);
-			return oldAttr;
-		},
-
-		/* returns Node */
-		removeNamedItem: function(key) {
-			var attr = this.getNamedItem(key);
-			_removeNamedNode(this._ownerElement,this,attr);
-			return attr;
-			
-			
-		},// raises: NOT_FOUND_ERR,NO_MODIFICATION_ALLOWED_ERR
-		
-		//for level2
-		removeNamedItemNS:function(namespaceURI,localName){
-			var attr = this.getNamedItemNS(namespaceURI,localName);
-			_removeNamedNode(this._ownerElement,this,attr);
-			return attr;
-		},
-		getNamedItemNS: function(namespaceURI, localName) {
-			var i = this.length;
-			while(i--){
-				var node = this[i];
-				if(node.localName == localName && node.namespaceURI == namespaceURI){
-					return node;
-				}
-			}
-			return null;
-		}
-	};
-	/**
-	 * @see http://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html#ID-102161490
-	 */
-	function DOMImplementation(/* Object */ features) {
-		this._features = {};
-		if (features) {
-			for (var feature in features) {
-				 this._features = features[feature];
-			}
-		}
-	}
-	DOMImplementation.prototype = {
-		hasFeature: function(/* string */ feature, /* string */ version) {
-			var versions = this._features[feature.toLowerCase()];
-			if (versions && (!version || version in versions)) {
-				return true;
-			} else {
-				return false;
-			}
-		},
-		// Introduced in DOM Level 2:
-		createDocument:function(namespaceURI,  qualifiedName, doctype){// raises:INVALID_CHARACTER_ERR,NAMESPACE_ERR,WRONG_DOCUMENT_ERR
-			var doc = new Document();
-			doc.implementation = this;
-			doc.childNodes = new NodeList();
-			doc.doctype = doctype;
-			if(doctype){
-				doc.appendChild(doctype);
-			}
-			if(qualifiedName){
-				var root = doc.createElementNS(namespaceURI,qualifiedName);
-				doc.appendChild(root);
-			}
-			return doc;
-		},
-		// Introduced in DOM Level 2:
-		createDocumentType:function(qualifiedName, publicId, systemId){// raises:INVALID_CHARACTER_ERR,NAMESPACE_ERR
-			var node = new DocumentType();
-			node.name = qualifiedName;
-			node.nodeName = qualifiedName;
-			node.publicId = publicId;
-			node.systemId = systemId;
-			// Introduced in DOM Level 2:
-			//readonly attribute DOMString        internalSubset;
-			
-			//TODO:..
-			//  readonly attribute NamedNodeMap     entities;
-			//  readonly attribute NamedNodeMap     notations;
-			return node;
-		}
-	};
+	  for (var _i3 = 0; _i3 < extractedLines.length; _i3++) {
+	    var _line = extractedLines[_i3];
+	    track.push(_line.line);
 
+	    for (var _i4 = 0, _Object$entries = Object.entries(_line.extendedValues); _i4 < _Object$entries.length; _i4++) {
+	      var _Object$entries$_i = _slicedToArray(_Object$entries[_i4], 2),
+	          name = _Object$entries$_i[0],
+	          val = _Object$entries$_i[1];
 
-	/**
-	 * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-1950641247
-	 */
+	      var props = properties;
 
-	function Node() {
-	}
-	Node.prototype = {
-		firstChild : null,
-		lastChild : null,
-		previousSibling : null,
-		nextSibling : null,
-		attributes : null,
-		parentNode : null,
-		childNodes : null,
-		ownerDocument : null,
-		nodeValue : null,
-		namespaceURI : null,
-		prefix : null,
-		localName : null,
-		// Modified in DOM Level 2:
-		insertBefore:function(newChild, refChild){//raises 
-			return _insertBefore(this,newChild,refChild);
-		},
-		replaceChild:function(newChild, oldChild){//raises 
-			this.insertBefore(newChild,oldChild);
-			if(oldChild){
-				this.removeChild(oldChild);
-			}
-		},
-		removeChild:function(oldChild){
-			return _removeChild(this,oldChild);
-		},
-		appendChild:function(newChild){
-			return this.insertBefore(newChild,null);
-		},
-		hasChildNodes:function(){
-			return this.firstChild != null;
-		},
-		cloneNode:function(deep){
-			return cloneNode(this.ownerDocument||this,this,deep);
-		},
-		// Modified in DOM Level 2:
-		normalize:function(){
-			var child = this.firstChild;
-			while(child){
-				var next = child.nextSibling;
-				if(next && next.nodeType == TEXT_NODE && child.nodeType == TEXT_NODE){
-					this.removeChild(next);
-					child.appendData(next.data);
-				}else {
-					child.normalize();
-					child = next;
-				}
-			}
-		},
-	  	// Introduced in DOM Level 2:
-		isSupported:function(feature, version){
-			return this.ownerDocument.implementation.hasFeature(feature,version);
-		},
-	    // Introduced in DOM Level 2:
-	    hasAttributes:function(){
-	    	return this.attributes.length>0;
-	    },
-	    lookupPrefix:function(namespaceURI){
-	    	var el = this;
-	    	while(el){
-	    		var map = el._nsMap;
-	    		//console.dir(map)
-	    		if(map){
-	    			for(var n in map){
-	    				if(map[n] == namespaceURI){
-	    					return n;
-	    				}
-	    			}
-	    		}
-	    		el = el.nodeType == ATTRIBUTE_NODE?el.ownerDocument : el.parentNode;
-	    	}
-	    	return null;
-	    },
-	    // Introduced in DOM Level 3:
-	    lookupNamespaceURI:function(prefix){
-	    	var el = this;
-	    	while(el){
-	    		var map = el._nsMap;
-	    		//console.dir(map)
-	    		if(map){
-	    			if(prefix in map){
-	    				return map[prefix] ;
-	    			}
-	    		}
-	    		el = el.nodeType == ATTRIBUTE_NODE?el.ownerDocument : el.parentNode;
-	    	}
-	    	return null;
-	    },
-	    // Introduced in DOM Level 3:
-	    isDefaultNamespace:function(namespaceURI){
-	    	var prefix = this.lookupPrefix(namespaceURI);
-	    	return prefix == null;
+	      if (name === "heart") {
+	        if (!properties.coordinateProperties) {
+	          properties.coordinateProperties = {};
+	        }
+
+	        props = properties.coordinateProperties;
+	      }
+
+	      if (multi) {
+	        if (!props[name]) props[name] = extractedLines.map(function (line) {
+	          return new Array(line.line.length).fill(null);
+	        });
+	        props[name][_i3] = val;
+	      } else {
+	        props[name] = val;
+	      }
 	    }
-	};
+	  }
 
+	  return {
+	    type: "Feature",
+	    properties: properties,
+	    geometry: multi ? {
+	      type: "MultiLineString",
+	      coordinates: track
+	    } : {
+	      type: "LineString",
+	      coordinates: track[0]
+	    }
+	  };
+	}
 
-	function _xmlEncoder(c){
-		return c == '<' && '&lt;' ||
-	         c == '>' && '&gt;' ||
-	         c == '&' && '&amp;' ||
-	         c == '"' && '&quot;' ||
-	         '&#'+c.charCodeAt()+';'
+	function getPoint(node) {
+	  return {
+	    type: "Feature",
+	    properties: Object.assign(getProperties$1(node), getMulti(node, ["sym"])),
+	    geometry: {
+	      type: "Point",
+	      coordinates: coordPair$1(node).coordinates
+	    }
+	  };
 	}
 
+	function gpxGen(doc) {
+	  var tracks, routes, waypoints, i, feature, _i5, _feature, _i6;
 
-	copy$2(NodeType,Node);
-	copy$2(NodeType,Node.prototype);
+	  return regeneratorRuntime.wrap(function gpxGen$(_context) {
+	    while (1) {
+	      switch (_context.prev = _context.next) {
+	        case 0:
+	          tracks = doc.getElementsByTagName("trk");
+	          routes = doc.getElementsByTagName("rte");
+	          waypoints = doc.getElementsByTagName("wpt");
+	          i = 0;
 
-	/**
-	 * @param callback return true for continue,false for break
-	 * @return boolean true: break visit;
-	 */
-	function _visitNode(node,callback){
-		if(callback(node)){
-			return true;
-		}
-		if(node = node.firstChild){
-			do{
-				if(_visitNode(node,callback)){return true}
-	        }while(node=node.nextSibling)
-	    }
-	}
-
-
-
-	function Document(){
-	}
-	function _onAddAttribute(doc,el,newAttr){
-		doc && doc._inc++;
-		var ns = newAttr.namespaceURI ;
-		if(ns == 'http://www.w3.org/2000/xmlns/'){
-			//update namespace
-			el._nsMap[newAttr.prefix?newAttr.localName:''] = newAttr.value;
-		}
-	}
-	function _onRemoveAttribute(doc,el,newAttr,remove){
-		doc && doc._inc++;
-		var ns = newAttr.namespaceURI ;
-		if(ns == 'http://www.w3.org/2000/xmlns/'){
-			//update namespace
-			delete el._nsMap[newAttr.prefix?newAttr.localName:''];
-		}
-	}
-	function _onUpdateChild(doc,el,newChild){
-		if(doc && doc._inc){
-			doc._inc++;
-			//update childNodes
-			var cs = el.childNodes;
-			if(newChild){
-				cs[cs.length++] = newChild;
-			}else {
-				//console.log(1)
-				var child = el.firstChild;
-				var i = 0;
-				while(child){
-					cs[i++] = child;
-					child =child.nextSibling;
-				}
-				cs.length = i;
-			}
-		}
-	}
+	        case 4:
+	          if (!(i < tracks.length)) {
+	            _context.next = 12;
+	            break;
+	          }
 
-	/**
-	 * attributes;
-	 * children;
-	 * 
-	 * writeable properties:
-	 * nodeValue,Attr:value,CharacterData:data
-	 * prefix
-	 */
-	function _removeChild(parentNode,child){
-		var previous = child.previousSibling;
-		var next = child.nextSibling;
-		if(previous){
-			previous.nextSibling = next;
-		}else {
-			parentNode.firstChild = next;
-		}
-		if(next){
-			next.previousSibling = previous;
-		}else {
-			parentNode.lastChild = previous;
-		}
-		_onUpdateChild(parentNode.ownerDocument,parentNode);
-		return child;
-	}
-	/**
-	 * preformance key(refChild == null)
-	 */
-	function _insertBefore(parentNode,newChild,nextChild){
-		var cp = newChild.parentNode;
-		if(cp){
-			cp.removeChild(newChild);//remove and update
-		}
-		if(newChild.nodeType === DOCUMENT_FRAGMENT_NODE){
-			var newFirst = newChild.firstChild;
-			if (newFirst == null) {
-				return newChild;
-			}
-			var newLast = newChild.lastChild;
-		}else {
-			newFirst = newLast = newChild;
-		}
-		var pre = nextChild ? nextChild.previousSibling : parentNode.lastChild;
-
-		newFirst.previousSibling = pre;
-		newLast.nextSibling = nextChild;
-		
-		
-		if(pre){
-			pre.nextSibling = newFirst;
-		}else {
-			parentNode.firstChild = newFirst;
-		}
-		if(nextChild == null){
-			parentNode.lastChild = newLast;
-		}else {
-			nextChild.previousSibling = newLast;
-		}
-		do{
-			newFirst.parentNode = parentNode;
-		}while(newFirst !== newLast && (newFirst= newFirst.nextSibling))
-		_onUpdateChild(parentNode.ownerDocument||parentNode,parentNode);
-		//console.log(parentNode.lastChild.nextSibling == null)
-		if (newChild.nodeType == DOCUMENT_FRAGMENT_NODE) {
-			newChild.firstChild = newChild.lastChild = null;
-		}
-		return newChild;
-	}
-	function _appendSingleChild(parentNode,newChild){
-		var cp = newChild.parentNode;
-		if(cp){
-			var pre = parentNode.lastChild;
-			cp.removeChild(newChild);//remove and update
-			var pre = parentNode.lastChild;
-		}
-		var pre = parentNode.lastChild;
-		newChild.parentNode = parentNode;
-		newChild.previousSibling = pre;
-		newChild.nextSibling = null;
-		if(pre){
-			pre.nextSibling = newChild;
-		}else {
-			parentNode.firstChild = newChild;
-		}
-		parentNode.lastChild = newChild;
-		_onUpdateChild(parentNode.ownerDocument,parentNode,newChild);
-		return newChild;
-		//console.log("__aa",parentNode.lastChild.nextSibling == null)
-	}
-	Document.prototype = {
-		//implementation : null,
-		nodeName :  '#document',
-		nodeType :  DOCUMENT_NODE,
-		doctype :  null,
-		documentElement :  null,
-		_inc : 1,
-		
-		insertBefore :  function(newChild, refChild){//raises 
-			if(newChild.nodeType == DOCUMENT_FRAGMENT_NODE){
-				var child = newChild.firstChild;
-				while(child){
-					var next = child.nextSibling;
-					this.insertBefore(child,refChild);
-					child = next;
-				}
-				return newChild;
-			}
-			if(this.documentElement == null && newChild.nodeType == ELEMENT_NODE){
-				this.documentElement = newChild;
-			}
-			
-			return _insertBefore(this,newChild,refChild),(newChild.ownerDocument = this),newChild;
-		},
-		removeChild :  function(oldChild){
-			if(this.documentElement == oldChild){
-				this.documentElement = null;
-			}
-			return _removeChild(this,oldChild);
-		},
-		// Introduced in DOM Level 2:
-		importNode : function(importedNode,deep){
-			return importNode(this,importedNode,deep);
-		},
-		// Introduced in DOM Level 2:
-		getElementById :	function(id){
-			var rtv = null;
-			_visitNode(this.documentElement,function(node){
-				if(node.nodeType == ELEMENT_NODE){
-					if(node.getAttribute('id') == id){
-						rtv = node;
-						return true;
-					}
-				}
-			});
-			return rtv;
-		},
-		
-		//document factory method:
-		createElement :	function(tagName){
-			var node = new Element();
-			node.ownerDocument = this;
-			node.nodeName = tagName;
-			node.tagName = tagName;
-			node.childNodes = new NodeList();
-			var attrs	= node.attributes = new NamedNodeMap();
-			attrs._ownerElement = node;
-			return node;
-		},
-		createDocumentFragment :	function(){
-			var node = new DocumentFragment();
-			node.ownerDocument = this;
-			node.childNodes = new NodeList();
-			return node;
-		},
-		createTextNode :	function(data){
-			var node = new Text();
-			node.ownerDocument = this;
-			node.appendData(data);
-			return node;
-		},
-		createComment :	function(data){
-			var node = new Comment();
-			node.ownerDocument = this;
-			node.appendData(data);
-			return node;
-		},
-		createCDATASection :	function(data){
-			var node = new CDATASection();
-			node.ownerDocument = this;
-			node.appendData(data);
-			return node;
-		},
-		createProcessingInstruction :	function(target,data){
-			var node = new ProcessingInstruction();
-			node.ownerDocument = this;
-			node.tagName = node.target = target;
-			node.nodeValue= node.data = data;
-			return node;
-		},
-		createAttribute :	function(name){
-			var node = new Attr();
-			node.ownerDocument	= this;
-			node.name = name;
-			node.nodeName	= name;
-			node.localName = name;
-			node.specified = true;
-			return node;
-		},
-		createEntityReference :	function(name){
-			var node = new EntityReference();
-			node.ownerDocument	= this;
-			node.nodeName	= name;
-			return node;
-		},
-		// Introduced in DOM Level 2:
-		createElementNS :	function(namespaceURI,qualifiedName){
-			var node = new Element();
-			var pl = qualifiedName.split(':');
-			var attrs	= node.attributes = new NamedNodeMap();
-			node.childNodes = new NodeList();
-			node.ownerDocument = this;
-			node.nodeName = qualifiedName;
-			node.tagName = qualifiedName;
-			node.namespaceURI = namespaceURI;
-			if(pl.length == 2){
-				node.prefix = pl[0];
-				node.localName = pl[1];
-			}else {
-				//el.prefix = null;
-				node.localName = qualifiedName;
-			}
-			attrs._ownerElement = node;
-			return node;
-		},
-		// Introduced in DOM Level 2:
-		createAttributeNS :	function(namespaceURI,qualifiedName){
-			var node = new Attr();
-			var pl = qualifiedName.split(':');
-			node.ownerDocument = this;
-			node.nodeName = qualifiedName;
-			node.name = qualifiedName;
-			node.namespaceURI = namespaceURI;
-			node.specified = true;
-			if(pl.length == 2){
-				node.prefix = pl[0];
-				node.localName = pl[1];
-			}else {
-				//el.prefix = null;
-				node.localName = qualifiedName;
-			}
-			return node;
-		}
-	};
-	_extends(Document,Node);
-
-
-	function Element() {
-		this._nsMap = {};
-	}Element.prototype = {
-		nodeType : ELEMENT_NODE,
-		hasAttribute : function(name){
-			return this.getAttributeNode(name)!=null;
-		},
-		getAttribute : function(name){
-			var attr = this.getAttributeNode(name);
-			return attr && attr.value || '';
-		},
-		getAttributeNode : function(name){
-			return this.attributes.getNamedItem(name);
-		},
-		setAttribute : function(name, value){
-			var attr = this.ownerDocument.createAttribute(name);
-			attr.value = attr.nodeValue = "" + value;
-			this.setAttributeNode(attr);
-		},
-		removeAttribute : function(name){
-			var attr = this.getAttributeNode(name);
-			attr && this.removeAttributeNode(attr);
-		},
-		
-		//four real opeartion method
-		appendChild:function(newChild){
-			if(newChild.nodeType === DOCUMENT_FRAGMENT_NODE){
-				return this.insertBefore(newChild,null);
-			}else {
-				return _appendSingleChild(this,newChild);
-			}
-		},
-		setAttributeNode : function(newAttr){
-			return this.attributes.setNamedItem(newAttr);
-		},
-		setAttributeNodeNS : function(newAttr){
-			return this.attributes.setNamedItemNS(newAttr);
-		},
-		removeAttributeNode : function(oldAttr){
-			//console.log(this == oldAttr.ownerElement)
-			return this.attributes.removeNamedItem(oldAttr.nodeName);
-		},
-		//get real attribute name,and remove it by removeAttributeNode
-		removeAttributeNS : function(namespaceURI, localName){
-			var old = this.getAttributeNodeNS(namespaceURI, localName);
-			old && this.removeAttributeNode(old);
-		},
-		
-		hasAttributeNS : function(namespaceURI, localName){
-			return this.getAttributeNodeNS(namespaceURI, localName)!=null;
-		},
-		getAttributeNS : function(namespaceURI, localName){
-			var attr = this.getAttributeNodeNS(namespaceURI, localName);
-			return attr && attr.value || '';
-		},
-		setAttributeNS : function(namespaceURI, qualifiedName, value){
-			var attr = this.ownerDocument.createAttributeNS(namespaceURI, qualifiedName);
-			attr.value = attr.nodeValue = "" + value;
-			this.setAttributeNode(attr);
-		},
-		getAttributeNodeNS : function(namespaceURI, localName){
-			return this.attributes.getNamedItemNS(namespaceURI, localName);
-		},
-		
-		getElementsByTagName : function(tagName){
-			return new LiveNodeList(this,function(base){
-				var ls = [];
-				_visitNode(base,function(node){
-					if(node !== base && node.nodeType == ELEMENT_NODE && (tagName === '*' || node.tagName == tagName)){
-						ls.push(node);
-					}
-				});
-				return ls;
-			});
-		},
-		getElementsByTagNameNS : function(namespaceURI, localName){
-			return new LiveNodeList(this,function(base){
-				var ls = [];
-				_visitNode(base,function(node){
-					if(node !== base && node.nodeType === ELEMENT_NODE && (namespaceURI === '*' || node.namespaceURI === namespaceURI) && (localName === '*' || node.localName == localName)){
-						ls.push(node);
-					}
-				});
-				return ls;
-				
-			});
-		}
-	};
-	Document.prototype.getElementsByTagName = Element.prototype.getElementsByTagName;
-	Document.prototype.getElementsByTagNameNS = Element.prototype.getElementsByTagNameNS;
-
-
-	_extends(Element,Node);
-	function Attr() {
-	}Attr.prototype.nodeType = ATTRIBUTE_NODE;
-	_extends(Attr,Node);
-
-
-	function CharacterData() {
-	}CharacterData.prototype = {
-		data : '',
-		substringData : function(offset, count) {
-			return this.data.substring(offset, offset+count);
-		},
-		appendData: function(text) {
-			text = this.data+text;
-			this.nodeValue = this.data = text;
-			this.length = text.length;
-		},
-		insertData: function(offset,text) {
-			this.replaceData(offset,0,text);
-		
-		},
-		appendChild:function(newChild){
-			throw new Error(ExceptionMessage[HIERARCHY_REQUEST_ERR])
-		},
-		deleteData: function(offset, count) {
-			this.replaceData(offset,count,"");
-		},
-		replaceData: function(offset, count, text) {
-			var start = this.data.substring(0,offset);
-			var end = this.data.substring(offset+count);
-			text = start + text + end;
-			this.nodeValue = this.data = text;
-			this.length = text.length;
-		}
-	};
-	_extends(CharacterData,Node);
-	function Text() {
-	}Text.prototype = {
-		nodeName : "#text",
-		nodeType : TEXT_NODE,
-		splitText : function(offset) {
-			var text = this.data;
-			var newText = text.substring(offset);
-			text = text.substring(0, offset);
-			this.data = this.nodeValue = text;
-			this.length = text.length;
-			var newNode = this.ownerDocument.createTextNode(newText);
-			if(this.parentNode){
-				this.parentNode.insertBefore(newNode, this.nextSibling);
-			}
-			return newNode;
-		}
-	};
-	_extends(Text,CharacterData);
-	function Comment() {
-	}Comment.prototype = {
-		nodeName : "#comment",
-		nodeType : COMMENT_NODE
-	};
-	_extends(Comment,CharacterData);
+	          feature = getTrack(tracks[i]);
 
-	function CDATASection() {
-	}CDATASection.prototype = {
-		nodeName : "#cdata-section",
-		nodeType : CDATA_SECTION_NODE
-	};
-	_extends(CDATASection,CharacterData);
+	          if (!feature) {
+	            _context.next = 9;
+	            break;
+	          }
 
+	          _context.next = 9;
+	          return feature;
 
-	function DocumentType() {
-	}DocumentType.prototype.nodeType = DOCUMENT_TYPE_NODE;
-	_extends(DocumentType,Node);
+	        case 9:
+	          i++;
+	          _context.next = 4;
+	          break;
 
-	function Notation() {
-	}Notation.prototype.nodeType = NOTATION_NODE;
-	_extends(Notation,Node);
+	        case 12:
+	          _i5 = 0;
 
-	function Entity() {
-	}Entity.prototype.nodeType = ENTITY_NODE;
-	_extends(Entity,Node);
+	        case 13:
+	          if (!(_i5 < routes.length)) {
+	            _context.next = 21;
+	            break;
+	          }
 
-	function EntityReference() {
-	}EntityReference.prototype.nodeType = ENTITY_REFERENCE_NODE;
-	_extends(EntityReference,Node);
+	          _feature = getRoute(routes[_i5]);
 
-	function DocumentFragment() {
-	}DocumentFragment.prototype.nodeName =	"#document-fragment";
-	DocumentFragment.prototype.nodeType =	DOCUMENT_FRAGMENT_NODE;
-	_extends(DocumentFragment,Node);
+	          if (!_feature) {
+	            _context.next = 18;
+	            break;
+	          }
 
+	          _context.next = 18;
+	          return _feature;
 
-	function ProcessingInstruction() {
-	}
-	ProcessingInstruction.prototype.nodeType = PROCESSING_INSTRUCTION_NODE;
-	_extends(ProcessingInstruction,Node);
-	function XMLSerializer$1(){}
-	XMLSerializer$1.prototype.serializeToString = function(node,isHtml,nodeFilter){
-		return nodeSerializeToString.call(node,isHtml,nodeFilter);
-	};
-	Node.prototype.toString = nodeSerializeToString;
-	function nodeSerializeToString(isHtml,nodeFilter){
-		var buf = [];
-		var refNode = this.nodeType == 9?this.documentElement:this;
-		var prefix = refNode.prefix;
-		var uri = refNode.namespaceURI;
-		
-		if(uri && prefix == null){
-			//console.log(prefix)
-			var prefix = refNode.lookupPrefix(uri);
-			if(prefix == null){
-				//isHTML = true;
-				var visibleNamespaces=[
-				{namespace:uri,prefix:null} ];
-			}
-		}
-		serializeToString(this,buf,isHtml,nodeFilter,visibleNamespaces);
-		//console.log('###',this.nodeType,uri,prefix,buf.join(''))
-		return buf.join('');
-	}
-	function needNamespaceDefine(node,isHTML, visibleNamespaces) {
-		var prefix = node.prefix||'';
-		var uri = node.namespaceURI;
-		if (!prefix && !uri){
-			return false;
-		}
-		if (prefix === "xml" && uri === "http://www.w3.org/XML/1998/namespace" 
-			|| uri == 'http://www.w3.org/2000/xmlns/'){
-			return false;
-		}
-		
-		var i = visibleNamespaces.length; 
-		//console.log('@@@@',node.tagName,prefix,uri,visibleNamespaces)
-		while (i--) {
-			var ns = visibleNamespaces[i];
-			// get namespace prefix
-			//console.log(node.nodeType,node.tagName,ns.prefix,prefix)
-			if (ns.prefix == prefix){
-				return ns.namespace != uri;
-			}
-		}
-		//console.log(isHTML,uri,prefix=='')
-		//if(isHTML && prefix ==null && uri == 'http://www.w3.org/1999/xhtml'){
-		//	return false;
-		//}
-		//node.flag = '11111'
-		//console.error(3,true,node.flag,node.prefix,node.namespaceURI)
-		return true;
-	}
-	function serializeToString(node,buf,isHTML,nodeFilter,visibleNamespaces){
-		if(nodeFilter){
-			node = nodeFilter(node);
-			if(node){
-				if(typeof node == 'string'){
-					buf.push(node);
-					return;
-				}
-			}else {
-				return;
-			}
-			//buf.sort.apply(attrs, attributeSorter);
-		}
-		switch(node.nodeType){
-		case ELEMENT_NODE:
-			if (!visibleNamespaces) { visibleNamespaces = []; }
-			var startVisibleNamespaces = visibleNamespaces.length;
-			var attrs = node.attributes;
-			var len = attrs.length;
-			var child = node.firstChild;
-			var nodeName = node.tagName;
-			
-			isHTML =  (htmlns === node.namespaceURI) ||isHTML; 
-			buf.push('<',nodeName);
-			
-			
-			
-			for(var i=0;i<len;i++){
-				// add namespaces for attributes
-				var attr = attrs.item(i);
-				if (attr.prefix == 'xmlns') {
-					visibleNamespaces.push({ prefix: attr.localName, namespace: attr.value });
-				}else if(attr.nodeName == 'xmlns'){
-					visibleNamespaces.push({ prefix: '', namespace: attr.value });
-				}
-			}
-			for(var i=0;i<len;i++){
-				var attr = attrs.item(i);
-				if (needNamespaceDefine(attr,isHTML, visibleNamespaces)) {
-					var prefix = attr.prefix||'';
-					var uri = attr.namespaceURI;
-					var ns = prefix ? ' xmlns:' + prefix : " xmlns";
-					buf.push(ns, '="' , uri , '"');
-					visibleNamespaces.push({ prefix: prefix, namespace:uri });
-				}
-				serializeToString(attr,buf,isHTML,nodeFilter,visibleNamespaces);
-			}
-			// add namespace for current node		
-			if (needNamespaceDefine(node,isHTML, visibleNamespaces)) {
-				var prefix = node.prefix||'';
-				var uri = node.namespaceURI;
-				var ns = prefix ? ' xmlns:' + prefix : " xmlns";
-				buf.push(ns, '="' , uri , '"');
-				visibleNamespaces.push({ prefix: prefix, namespace:uri });
-			}
-			
-			if(child || isHTML && !/^(?:meta|link|img|br|hr|input)$/i.test(nodeName)){
-				buf.push('>');
-				//if is cdata child node
-				if(isHTML && /^script$/i.test(nodeName)){
-					while(child){
-						if(child.data){
-							buf.push(child.data);
-						}else {
-							serializeToString(child,buf,isHTML,nodeFilter,visibleNamespaces);
-						}
-						child = child.nextSibling;
-					}
-				}else
-				{
-					while(child){
-						serializeToString(child,buf,isHTML,nodeFilter,visibleNamespaces);
-						child = child.nextSibling;
-					}
-				}
-				buf.push('</',nodeName,'>');
-			}else {
-				buf.push('/>');
-			}
-			// remove added visible namespaces
-			//visibleNamespaces.length = startVisibleNamespaces;
-			return;
-		case DOCUMENT_NODE:
-		case DOCUMENT_FRAGMENT_NODE:
-			var child = node.firstChild;
-			while(child){
-				serializeToString(child,buf,isHTML,nodeFilter,visibleNamespaces);
-				child = child.nextSibling;
-			}
-			return;
-		case ATTRIBUTE_NODE:
-			return buf.push(' ',node.name,'="',node.value.replace(/[<&"]/g,_xmlEncoder),'"');
-		case TEXT_NODE:
-			return buf.push(node.data.replace(/[<&]/g,_xmlEncoder));
-		case CDATA_SECTION_NODE:
-			return buf.push( '<![CDATA[',node.data,']]>');
-		case COMMENT_NODE:
-			return buf.push( "<!--",node.data,"-->");
-		case DOCUMENT_TYPE_NODE:
-			var pubid = node.publicId;
-			var sysid = node.systemId;
-			buf.push('<!DOCTYPE ',node.name);
-			if(pubid){
-				buf.push(' PUBLIC "',pubid);
-				if (sysid && sysid!='.') {
-					buf.push( '" "',sysid);
-				}
-				buf.push('">');
-			}else if(sysid && sysid!='.'){
-				buf.push(' SYSTEM "',sysid,'">');
-			}else {
-				var sub = node.internalSubset;
-				if(sub){
-					buf.push(" [",sub,"]");
-				}
-				buf.push(">");
-			}
-			return;
-		case PROCESSING_INSTRUCTION_NODE:
-			return buf.push( "<?",node.target," ",node.data,"?>");
-		case ENTITY_REFERENCE_NODE:
-			return buf.push( '&',node.nodeName,';');
-		//case ENTITY_NODE:
-		//case NOTATION_NODE:
-		default:
-			buf.push('??',node.nodeName);
-		}
-	}
-	function importNode(doc,node,deep){
-		var node2;
-		switch (node.nodeType) {
-		case ELEMENT_NODE:
-			node2 = node.cloneNode(false);
-			node2.ownerDocument = doc;
-			//var attrs = node2.attributes;
-			//var len = attrs.length;
-			//for(var i=0;i<len;i++){
-				//node2.setAttributeNodeNS(importNode(doc,attrs.item(i),deep));
-			//}
-		case DOCUMENT_FRAGMENT_NODE:
-			break;
-		case ATTRIBUTE_NODE:
-			deep = true;
-			break;
-		//case ENTITY_REFERENCE_NODE:
-		//case PROCESSING_INSTRUCTION_NODE:
-		////case TEXT_NODE:
-		//case CDATA_SECTION_NODE:
-		//case COMMENT_NODE:
-		//	deep = false;
-		//	break;
-		//case DOCUMENT_NODE:
-		//case DOCUMENT_TYPE_NODE:
-		//cannot be imported.
-		//case ENTITY_NODE:
-		//case NOTATION_NODE：
-		//can not hit in level3
-		//default:throw e;
-		}
-		if(!node2){
-			node2 = node.cloneNode(false);//false
-		}
-		node2.ownerDocument = doc;
-		node2.parentNode = null;
-		if(deep){
-			var child = node.firstChild;
-			while(child){
-				node2.appendChild(importNode(doc,child,deep));
-				child = child.nextSibling;
-			}
-		}
-		return node2;
-	}
-	//
-	//var _relationMap = {firstChild:1,lastChild:1,previousSibling:1,nextSibling:1,
-	//					attributes:1,childNodes:1,parentNode:1,documentElement:1,doctype,};
-	function cloneNode(doc,node,deep){
-		var node2 = new node.constructor();
-		for(var n in node){
-			var v = node[n];
-			if(typeof v != 'object' ){
-				if(v != node2[n]){
-					node2[n] = v;
-				}
-			}
-		}
-		if(node.childNodes){
-			node2.childNodes = new NodeList();
-		}
-		node2.ownerDocument = doc;
-		switch (node2.nodeType) {
-		case ELEMENT_NODE:
-			var attrs	= node.attributes;
-			var attrs2	= node2.attributes = new NamedNodeMap();
-			var len = attrs.length;
-			attrs2._ownerElement = node2;
-			for(var i=0;i<len;i++){
-				node2.setAttributeNode(cloneNode(doc,attrs.item(i),true));
-			}
-			break;	case ATTRIBUTE_NODE:
-			deep = true;
-		}
-		if(deep){
-			var child = node.firstChild;
-			while(child){
-				node2.appendChild(cloneNode(doc,child,deep));
-				child = child.nextSibling;
-			}
-		}
-		return node2;
-	}
-
-	function __set__(object,key,value){
-		object[key] = value;
-	}
-	//do dynamic
-	try{
-		if(Object.defineProperty){
-			Object.defineProperty(LiveNodeList.prototype,'length',{
-				get:function(){
-					_updateLiveList(this);
-					return this.$$length;
-				}
-			});
-			Object.defineProperty(Node.prototype,'textContent',{
-				get:function(){
-					return getTextContent(this);
-				},
-				set:function(data){
-					switch(this.nodeType){
-					case ELEMENT_NODE:
-					case DOCUMENT_FRAGMENT_NODE:
-						while(this.firstChild){
-							this.removeChild(this.firstChild);
-						}
-						if(data || String(data)){
-							this.appendChild(this.ownerDocument.createTextNode(data));
-						}
-						break;
-					default:
-						//TODO:
-						this.data = data;
-						this.value = data;
-						this.nodeValue = data;
-					}
-				}
-			});
-			
-			function getTextContent(node){
-				switch(node.nodeType){
-				case ELEMENT_NODE:
-				case DOCUMENT_FRAGMENT_NODE:
-					var buf = [];
-					node = node.firstChild;
-					while(node){
-						if(node.nodeType!==7 && node.nodeType !==8){
-							buf.push(getTextContent(node));
-						}
-						node = node.nextSibling;
-					}
-					return buf.join('');
-				default:
-					return node.nodeValue;
-				}
-			}
-			__set__ = function(object,key,value){
-				//console.log(value)
-				object['$$'+key] = value;
-			};
-		}
-	}catch(e){//ie8
-	}
-
-	//if(typeof require == 'function'){
-		var DOMImplementation_1 = DOMImplementation;
-		var XMLSerializer_1 = XMLSerializer$1;
-	//}
-
-	var dom = {
-		DOMImplementation: DOMImplementation_1,
-		XMLSerializer: XMLSerializer_1
-	};
+	        case 18:
+	          _i5++;
+	          _context.next = 13;
+	          break;
 
-	var domParser = createCommonjsModule(function (module, exports) {
-	function DOMParser(options){
-		this.options = options ||{locator:{}};
-		
-	}
-	DOMParser.prototype.parseFromString = function(source,mimeType){
-		var options = this.options;
-		var sax =  new XMLReader();
-		var domBuilder = options.domBuilder || new DOMHandler();//contentHandler and LexicalHandler
-		var errorHandler = options.errorHandler;
-		var locator = options.locator;
-		var defaultNSMap = options.xmlns||{};
-		var entityMap = {'lt':'<','gt':'>','amp':'&','quot':'"','apos':"'"};
-		if(locator){
-			domBuilder.setDocumentLocator(locator);
-		}
-		
-		sax.errorHandler = buildErrorHandler(errorHandler,domBuilder,locator);
-		sax.domBuilder = options.domBuilder || domBuilder;
-		if(/\/x?html?$/.test(mimeType)){
-			entityMap.nbsp = '\xa0';
-			entityMap.copy = '\xa9';
-			defaultNSMap['']= 'http://www.w3.org/1999/xhtml';
-		}
-		defaultNSMap.xml = defaultNSMap.xml || 'http://www.w3.org/XML/1998/namespace';
-		if(source){
-			sax.parse(source,defaultNSMap,entityMap);
-		}else {
-			sax.errorHandler.error("invalid doc source");
-		}
-		return domBuilder.doc;
-	};
-	function buildErrorHandler(errorImpl,domBuilder,locator){
-		if(!errorImpl){
-			if(domBuilder instanceof DOMHandler){
-				return domBuilder;
-			}
-			errorImpl = domBuilder ;
-		}
-		var errorHandler = {};
-		var isCallback = errorImpl instanceof Function;
-		locator = locator||{};
-		function build(key){
-			var fn = errorImpl[key];
-			if(!fn && isCallback){
-				fn = errorImpl.length == 2?function(msg){errorImpl(key,msg);}:errorImpl;
-			}
-			errorHandler[key] = fn && function(msg){
-				fn('[xmldom '+key+']\t'+msg+_locator(locator));
-			}||function(){};
-		}
-		build('warning');
-		build('error');
-		build('fatalError');
-		return errorHandler;
-	}
-
-	//console.log('#\n\n\n\n\n\n\n####')
-	/**
-	 * +ContentHandler+ErrorHandler
-	 * +LexicalHandler+EntityResolver2
-	 * -DeclHandler-DTDHandler 
-	 * 
-	 * DefaultHandler:EntityResolver, DTDHandler, ContentHandler, ErrorHandler
-	 * DefaultHandler2:DefaultHandler,LexicalHandler, DeclHandler, EntityResolver2
-	 * @link http://www.saxproject.org/apidoc/org/xml/sax/helpers/DefaultHandler.html
-	 */
-	function DOMHandler() {
-	    this.cdata = false;
-	}
-	function position(locator,node){
-		node.lineNumber = locator.lineNumber;
-		node.columnNumber = locator.columnNumber;
+	        case 21:
+	          _i6 = 0;
+
+	        case 22:
+	          if (!(_i6 < waypoints.length)) {
+	            _context.next = 28;
+	            break;
+	          }
+
+	          _context.next = 25;
+	          return getPoint(waypoints[_i6]);
+
+	        case 25:
+	          _i6++;
+	          _context.next = 22;
+	          break;
+
+	        case 28:
+	        case "end":
+	          return _context.stop();
+	      }
+	    }
+	  }, _marked);
 	}
-	/**
-	 * @see org.xml.sax.ContentHandler#startDocument
-	 * @link http://www.saxproject.org/apidoc/org/xml/sax/ContentHandler.html
-	 */ 
-	DOMHandler.prototype = {
-		startDocument : function() {
-	    	this.doc = new DOMImplementation().createDocument(null, null, null);
-	    	if (this.locator) {
-	        	this.doc.documentURI = this.locator.systemId;
-	    	}
-		},
-		startElement:function(namespaceURI, localName, qName, attrs) {
-			var doc = this.doc;
-		    var el = doc.createElementNS(namespaceURI, qName||localName);
-		    var len = attrs.length;
-		    appendElement(this, el);
-		    this.currentElement = el;
-		    
-			this.locator && position(this.locator,el);
-		    for (var i = 0 ; i < len; i++) {
-		        var namespaceURI = attrs.getURI(i);
-		        var value = attrs.getValue(i);
-		        var qName = attrs.getQName(i);
-				var attr = doc.createAttributeNS(namespaceURI, qName);
-				this.locator &&position(attrs.getLocator(i),attr);
-				attr.value = attr.nodeValue = value;
-				el.setAttributeNode(attr);
-		    }
-		},
-		endElement:function(namespaceURI, localName, qName) {
-			var current = this.currentElement;
-			var tagName = current.tagName;
-			this.currentElement = current.parentNode;
-		},
-		startPrefixMapping:function(prefix, uri) {
-		},
-		endPrefixMapping:function(prefix) {
-		},
-		processingInstruction:function(target, data) {
-		    var ins = this.doc.createProcessingInstruction(target, data);
-		    this.locator && position(this.locator,ins);
-		    appendElement(this, ins);
-		},
-		ignorableWhitespace:function(ch, start, length) {
-		},
-		characters:function(chars, start, length) {
-			chars = _toString.apply(this,arguments);
-			//console.log(chars)
-			if(chars){
-				if (this.cdata) {
-					var charNode = this.doc.createCDATASection(chars);
-				} else {
-					var charNode = this.doc.createTextNode(chars);
-				}
-				if(this.currentElement){
-					this.currentElement.appendChild(charNode);
-				}else if(/^\s*$/.test(chars)){
-					this.doc.appendChild(charNode);
-					//process xml
-				}
-				this.locator && position(this.locator,charNode);
-			}
-		},
-		skippedEntity:function(name) {
-		},
-		endDocument:function() {
-			this.doc.normalize();
-		},
-		setDocumentLocator:function (locator) {
-		    if(this.locator = locator){// && !('lineNumber' in locator)){
-		    	locator.lineNumber = 0;
-		    }
-		},
-		//LexicalHandler
-		comment:function(chars, start, length) {
-			chars = _toString.apply(this,arguments);
-		    var comm = this.doc.createComment(chars);
-		    this.locator && position(this.locator,comm);
-		    appendElement(this, comm);
-		},
-		
-		startCDATA:function() {
-		    //used in characters() methods
-		    this.cdata = true;
-		},
-		endCDATA:function() {
-		    this.cdata = false;
-		},
-		
-		startDTD:function(name, publicId, systemId) {
-			var impl = this.doc.implementation;
-		    if (impl && impl.createDocumentType) {
-		        var dt = impl.createDocumentType(name, publicId, systemId);
-		        this.locator && position(this.locator,dt);
-		        appendElement(this, dt);
-		    }
-		},
-		/**
-		 * @see org.xml.sax.ErrorHandler
-		 * @link http://www.saxproject.org/apidoc/org/xml/sax/ErrorHandler.html
-		 */
-		warning:function(error) {
-			console.warn('[xmldom warning]\t'+error,_locator(this.locator));
-		},
-		error:function(error) {
-			console.error('[xmldom error]\t'+error,_locator(this.locator));
-		},
-		fatalError:function(error) {
-			console.error('[xmldom fatalError]\t'+error,_locator(this.locator));
-		    throw error;
-		}
-	};
-	function _locator(l){
-		if(l){
-			return '\n@'+(l.systemId ||'')+'#[line:'+l.lineNumber+',col:'+l.columnNumber+']'
-		}
-	}
-	function _toString(chars,start,length){
-		if(typeof chars == 'string'){
-			return chars.substr(start,length)
-		}else {//java sax connect width xmldom on rhino(what about: "? && !(chars instanceof String)")
-			if(chars.length >= start+length || start){
-				return new java.lang.String(chars,start,length)+'';
-			}
-			return chars;
-		}
+
+	function gpx(doc) {
+	  return {
+	    type: "FeatureCollection",
+	    features: Array.from(gpxGen(doc))
+	  };
 	}
 
-	/*
-	 * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/LexicalHandler.html
-	 * used method of org.xml.sax.ext.LexicalHandler:
-	 *  #comment(chars, start, length)
-	 *  #startCDATA()
-	 *  #endCDATA()
-	 *  #startDTD(name, publicId, systemId)
-	 *
-	 *
-	 * IGNORED method of org.xml.sax.ext.LexicalHandler:
-	 *  #endDTD()
-	 *  #startEntity(name)
-	 *  #endEntity(name)
-	 *
-	 *
-	 * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/DeclHandler.html
-	 * IGNORED method of org.xml.sax.ext.DeclHandler
-	 * 	#attributeDecl(eName, aName, type, mode, value)
-	 *  #elementDecl(name, model)
-	 *  #externalEntityDecl(name, publicId, systemId)
-	 *  #internalEntityDecl(name, value)
-	 * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/EntityResolver2.html
-	 * IGNORED method of org.xml.sax.EntityResolver2
-	 *  #resolveEntity(String name,String publicId,String baseURI,String systemId)
-	 *  #resolveEntity(publicId, systemId)
-	 *  #getExternalSubset(name, baseURI)
-	 * @link http://www.saxproject.org/apidoc/org/xml/sax/DTDHandler.html
-	 * IGNORED method of org.xml.sax.DTDHandler
-	 *  #notationDecl(name, publicId, systemId) {};
-	 *  #unparsedEntityDecl(name, publicId, systemId, notationName) {};
-	 */
-	"endDTD,startEntity,endEntity,attributeDecl,elementDecl,externalEntityDecl,internalEntityDecl,resolveEntity,getExternalSubset,notationDecl,unparsedEntityDecl".replace(/\w+/g,function(key){
-		DOMHandler.prototype[key] = function(){return null};
-	});
+	var removeSpace = /\s*/g;
+	var trimSpace = /^\s*|\s*$/g;
+	var splitSpace = /\s+/; // generate a short, numeric hash of a string
 
-	/* Private static helpers treated below as private instance methods, so don't need to add these to the public API; we might use a Relator to also get rid of non-standard public properties */
-	function appendElement (hander,node) {
-	    if (!hander.currentElement) {
-	        hander.doc.appendChild(node);
-	    } else {
-	        hander.currentElement.appendChild(node);
-	    }
-	}//appendChild and setAttributeNS are preformance key
+	function okhash(x) {
+	  if (!x || !x.length) return 0;
+	  var h = 0;
 
-	//if(typeof require == 'function'){
-		var XMLReader = sax.XMLReader;
-		var DOMImplementation = exports.DOMImplementation = dom.DOMImplementation;
-		exports.XMLSerializer = dom.XMLSerializer ;
-		exports.DOMParser = DOMParser;
-	//}
-	});
+	  for (var i = 0; i < x.length; i++) {
+	    h = (h << 5) - h + x.charCodeAt(i) | 0;
+	  }
 
-	var togeojson = createCommonjsModule(function (module, exports) {
-	var toGeoJSON = (function() {
-
-	    var removeSpace = /\s*/g,
-	        trimSpace = /^\s*|\s*$/g,
-	        splitSpace = /\s+/;
-	    // generate a short, numeric hash of a string
-	    function okhash(x) {
-	        if (!x || !x.length) { return 0; }
-	        for (var i = 0, h = 0; i < x.length; i++) {
-	            h = ((h << 5) - h) + x.charCodeAt(i) | 0;
-	        } return h;
-	    }
-	    // all Y children of X
-	    function get(x, y) { return x.getElementsByTagName(y); }
-	    function attr(x, y) { return x.getAttribute(y); }
-	    function attrf(x, y) { return parseFloat(attr(x, y)); }
-	    // one Y child of X, if any, otherwise null
-	    function get1(x, y) { var n = get(x, y); return n.length ? n[0] : null; }
-	    // https://developer.mozilla.org/en-US/docs/Web/API/Node.normalize
-	    function norm(el) { if (el.normalize) { el.normalize(); } return el; }
-	    // cast array x into numbers
-	    function numarray(x) {
-	        for (var j = 0, o = []; j < x.length; j++) { o[j] = parseFloat(x[j]); }
-	        return o;
-	    }
-	    // get the content of a text node, if any
-	    function nodeVal(x) {
-	        if (x) { norm(x); }
-	        return (x && x.textContent) || '';
-	    }
-	    // get the contents of multiple text nodes, if present
-	    function getMulti(x, ys) {
-	        var o = {}, n, k;
-	        for (k = 0; k < ys.length; k++) {
-	            n = get1(x, ys[k]);
-	            if (n) { o[ys[k]] = nodeVal(n); }
-	        }
-	        return o;
-	    }
-	    // add properties of Y to X, overwriting if present in both
-	    function extend(x, y) { for (var k in y) { x[k] = y[k]; } }
-	    // get one coordinate from a coordinate array, if any
-	    function coord1(v) { return numarray(v.replace(removeSpace, '').split(',')); }
-	    // get all coordinates from a coordinate array as [[],[]]
-	    function coord(v) {
-	        var coords = v.replace(trimSpace, '').split(splitSpace),
-	            o = [];
-	        for (var i = 0; i < coords.length; i++) {
-	            o.push(coord1(coords[i]));
-	        }
-	        return o;
-	    }
-	    function coordPair(x) {
-	        var ll = [attrf(x, 'lon'), attrf(x, 'lat')],
-	            ele = get1(x, 'ele'),
-	            // handle namespaced attribute in browser
-	            heartRate = get1(x, 'gpxtpx:hr') || get1(x, 'hr'),
-	            time = get1(x, 'time'),
-	            e;
-	        if (ele) {
-	            e = parseFloat(nodeVal(ele));
-	            if (!isNaN(e)) {
-	                ll.push(e);
-	            }
-	        }
-	        return {
-	            coordinates: ll,
-	            time: time ? nodeVal(time) : null,
-	            heartRate: heartRate ? parseFloat(nodeVal(heartRate)) : null
-	        };
-	    }
+	  return h;
+	} // get one coordinate from a coordinate array, if any
 
-	    // create a new feature collection parent object
-	    function fc() {
-	        return {
-	            type: 'FeatureCollection',
-	            features: []
-	        };
-	    }
 
-	    var serializer;
-	    if (typeof XMLSerializer !== 'undefined') {
-	        /* istanbul ignore next */
-	        serializer = new XMLSerializer();
-	    // only require xmldom in a node environment
-	    } else if ( typeof process === 'object' && !process.browser) {
-	        serializer = new (domParser.XMLSerializer)();
-	    }
-	    function xml2str(str) {
-	        // IE9 will create a new XMLSerializer but it'll crash immediately.
-	        // This line is ignored because we don't run coverage tests in IE9
-	        /* istanbul ignore next */
-	        if (str.xml !== undefined) { return str.xml; }
-	        return serializer.serializeToString(str);
-	    }
-
-	    var t = {
-	        kml: function(doc) {
-
-	            var gj = fc(),
-	                // styleindex keeps track of hashed styles in order to match features
-	                styleIndex = {}, styleByHash = {},
-	                // stylemapindex keeps track of style maps to expose in properties
-	                styleMapIndex = {},
-	                // atomic geospatial types supported by KML - MultiGeometry is
-	                // handled separately
-	                geotypes = ['Polygon', 'LineString', 'Point', 'Track', 'gx:Track'],
-	                // all root placemarks in the file
-	                placemarks = get(doc, 'Placemark'),
-	                styles = get(doc, 'Style'),
-	                styleMaps = get(doc, 'StyleMap');
-
-	            for (var k = 0; k < styles.length; k++) {
-	                var hash = okhash(xml2str(styles[k])).toString(16);
-	                styleIndex['#' + attr(styles[k], 'id')] = hash;
-	                styleByHash[hash] = styles[k];
-	            }
-	            for (var l = 0; l < styleMaps.length; l++) {
-	                styleIndex['#' + attr(styleMaps[l], 'id')] = okhash(xml2str(styleMaps[l])).toString(16);
-	                var pairs = get(styleMaps[l], 'Pair');
-	                var pairsMap = {};
-	                for (var m = 0; m < pairs.length; m++) {
-	                    pairsMap[nodeVal(get1(pairs[m], 'key'))] = nodeVal(get1(pairs[m], 'styleUrl'));
-	                }
-	                styleMapIndex['#' + attr(styleMaps[l], 'id')] = pairsMap;
+	function coord1(v) {
+	  return v.replace(removeSpace, "").split(",").map(parseFloat);
+	} // get all coordinates from a coordinate array as [[],[]]
 
-	            }
-	            for (var j = 0; j < placemarks.length; j++) {
-	                gj.features = gj.features.concat(getPlacemark(placemarks[j]));
-	            }
-	            function kmlColor(v) {
-	                var color, opacity;
-	                v = v || '';
-	                if (v.substr(0, 1) === '#') { v = v.substr(1); }
-	                if (v.length === 6 || v.length === 3) { color = v; }
-	                if (v.length === 8) {
-	                    opacity = parseInt(v.substr(0, 2), 16) / 255;
-	                    color = '#' + v.substr(6, 2) +
-	                        v.substr(4, 2) +
-	                        v.substr(2, 2);
-	                }
-	                return [color, isNaN(opacity) ? undefined : opacity];
-	            }
-	            function gxCoord(v) { return numarray(v.split(' ')); }
-	            function gxCoords(root) {
-	                var elems = get(root, 'coord'), coords = [], times = [];
-	                if (elems.length === 0) { elems = get(root, 'gx:coord'); }
-	                for (var i = 0; i < elems.length; i++) { coords.push(gxCoord(nodeVal(elems[i]))); }
-	                var timeElems = get(root, 'when');
-	                for (var j = 0; j < timeElems.length; j++) { times.push(nodeVal(timeElems[j])); }
-	                return {
-	                    coords: coords,
-	                    times: times
-	                };
-	            }
-	            function getGeometry(root) {
-	                var geomNode, geomNodes, i, j, k, geoms = [], coordTimes = [];
-	                if (get1(root, 'MultiGeometry')) { return getGeometry(get1(root, 'MultiGeometry')); }
-	                if (get1(root, 'MultiTrack')) { return getGeometry(get1(root, 'MultiTrack')); }
-	                if (get1(root, 'gx:MultiTrack')) { return getGeometry(get1(root, 'gx:MultiTrack')); }
-	                for (i = 0; i < geotypes.length; i++) {
-	                    geomNodes = get(root, geotypes[i]);
-	                    if (geomNodes) {
-	                        for (j = 0; j < geomNodes.length; j++) {
-	                            geomNode = geomNodes[j];
-	                            if (geotypes[i] === 'Point') {
-	                                geoms.push({
-	                                    type: 'Point',
-	                                    coordinates: coord1(nodeVal(get1(geomNode, 'coordinates')))
-	                                });
-	                            } else if (geotypes[i] === 'LineString') {
-	                                geoms.push({
-	                                    type: 'LineString',
-	                                    coordinates: coord(nodeVal(get1(geomNode, 'coordinates')))
-	                                });
-	                            } else if (geotypes[i] === 'Polygon') {
-	                                var rings = get(geomNode, 'LinearRing'),
-	                                    coords = [];
-	                                for (k = 0; k < rings.length; k++) {
-	                                    coords.push(coord(nodeVal(get1(rings[k], 'coordinates'))));
-	                                }
-	                                geoms.push({
-	                                    type: 'Polygon',
-	                                    coordinates: coords
-	                                });
-	                            } else if (geotypes[i] === 'Track' ||
-	                                geotypes[i] === 'gx:Track') {
-	                                var track = gxCoords(geomNode);
-	                                geoms.push({
-	                                    type: 'LineString',
-	                                    coordinates: track.coords
-	                                });
-	                                if (track.times.length) { coordTimes.push(track.times); }
-	                            }
-	                        }
-	                    }
-	                }
-	                return {
-	                    geoms: geoms,
-	                    coordTimes: coordTimes
-	                };
-	            }
-	            function getPlacemark(root) {
-	                var geomsAndTimes = getGeometry(root), i, properties = {},
-	                    name = nodeVal(get1(root, 'name')),
-	                    address = nodeVal(get1(root, 'address')),
-	                    styleUrl = nodeVal(get1(root, 'styleUrl')),
-	                    description = nodeVal(get1(root, 'description')),
-	                    timeSpan = get1(root, 'TimeSpan'),
-	                    timeStamp = get1(root, 'TimeStamp'),
-	                    extendedData = get1(root, 'ExtendedData'),
-	                    lineStyle = get1(root, 'LineStyle'),
-	                    polyStyle = get1(root, 'PolyStyle'),
-	                    visibility = get1(root, 'visibility');
-
-	                if (!geomsAndTimes.geoms.length) { return []; }
-	                if (name) { properties.name = name; }
-	                if (address) { properties.address = address; }
-	                if (styleUrl) {
-	                    if (styleUrl[0] !== '#') {
-	                        styleUrl = '#' + styleUrl;
-	                    }
 
-	                    properties.styleUrl = styleUrl;
-	                    if (styleIndex[styleUrl]) {
-	                        properties.styleHash = styleIndex[styleUrl];
-	                    }
-	                    if (styleMapIndex[styleUrl]) {
-	                        properties.styleMapHash = styleMapIndex[styleUrl];
-	                        properties.styleHash = styleIndex[styleMapIndex[styleUrl].normal];
-	                    }
-	                    // Try to populate the lineStyle or polyStyle since we got the style hash
-	                    var style = styleByHash[properties.styleHash];
-	                    if (style) {
-	                        if (!lineStyle) { lineStyle = get1(style, 'LineStyle'); }
-	                        if (!polyStyle) { polyStyle = get1(style, 'PolyStyle'); }
-	                    }
-	                }
-	                if (description) { properties.description = description; }
-	                if (timeSpan) {
-	                    var begin = nodeVal(get1(timeSpan, 'begin'));
-	                    var end = nodeVal(get1(timeSpan, 'end'));
-	                    properties.timespan = { begin: begin, end: end };
-	                }
-	                if (timeStamp) {
-	                    properties.timestamp = nodeVal(get1(timeStamp, 'when'));
-	                }
-	                if (lineStyle) {
-	                    var linestyles = kmlColor(nodeVal(get1(lineStyle, 'color'))),
-	                        color = linestyles[0],
-	                        opacity = linestyles[1],
-	                        width = parseFloat(nodeVal(get1(lineStyle, 'width')));
-	                    if (color) { properties.stroke = color; }
-	                    if (!isNaN(opacity)) { properties['stroke-opacity'] = opacity; }
-	                    if (!isNaN(width)) { properties['stroke-width'] = width; }
-	                }
-	                if (polyStyle) {
-	                    var polystyles = kmlColor(nodeVal(get1(polyStyle, 'color'))),
-	                        pcolor = polystyles[0],
-	                        popacity = polystyles[1],
-	                        fill = nodeVal(get1(polyStyle, 'fill')),
-	                        outline = nodeVal(get1(polyStyle, 'outline'));
-	                    if (pcolor) { properties.fill = pcolor; }
-	                    if (!isNaN(popacity)) { properties['fill-opacity'] = popacity; }
-	                    if (fill) { properties['fill-opacity'] = fill === '1' ? properties['fill-opacity'] || 1 : 0; }
-	                    if (outline) { properties['stroke-opacity'] = outline === '1' ? properties['stroke-opacity'] || 1 : 0; }
-	                }
-	                if (extendedData) {
-	                    var datas = get(extendedData, 'Data'),
-	                        simpleDatas = get(extendedData, 'SimpleData');
+	function coord(v) {
+	  return v.replace(trimSpace, "").split(splitSpace).map(coord1);
+	}
 
-	                    for (i = 0; i < datas.length; i++) {
-	                        properties[datas[i].getAttribute('name')] = nodeVal(get1(datas[i], 'value'));
-	                    }
-	                    for (i = 0; i < simpleDatas.length; i++) {
-	                        properties[simpleDatas[i].getAttribute('name')] = nodeVal(simpleDatas[i]);
-	                    }
-	                }
-	                if (visibility) {
-	                    properties.visibility = nodeVal(visibility);
-	                }
-	                if (geomsAndTimes.coordTimes.length) {
-	                    properties.coordTimes = (geomsAndTimes.coordTimes.length === 1) ?
-	                        geomsAndTimes.coordTimes[0] : geomsAndTimes.coordTimes;
-	                }
-	                var feature = {
-	                    type: 'Feature',
-	                    geometry: (geomsAndTimes.geoms.length === 1) ? geomsAndTimes.geoms[0] : {
-	                        type: 'GeometryCollection',
-	                        geometries: geomsAndTimes.geoms
-	                    },
-	                    properties: properties
-	                };
-	                if (attr(root, 'id')) { feature.id = attr(root, 'id'); }
-	                return [feature];
-	            }
-	            return gj;
-	        },
-	        gpx: function(doc) {
-	            var i,
-	                tracks = get(doc, 'trk'),
-	                routes = get(doc, 'rte'),
-	                waypoints = get(doc, 'wpt'),
-	                // a feature collection
-	                gj = fc(),
-	                feature;
-	            for (i = 0; i < tracks.length; i++) {
-	                feature = getTrack(tracks[i]);
-	                if (feature) { gj.features.push(feature); }
-	            }
-	            for (i = 0; i < routes.length; i++) {
-	                feature = getRoute(routes[i]);
-	                if (feature) { gj.features.push(feature); }
-	            }
-	            for (i = 0; i < waypoints.length; i++) {
-	                gj.features.push(getPoint(waypoints[i]));
-	            }
-	            function getPoints(node, pointname) {
-	                var pts = get(node, pointname),
-	                    line = [],
-	                    times = [],
-	                    heartRates = [],
-	                    l = pts.length;
-	                if (l < 2) { return {}; }  // Invalid line in GeoJSON
-	                for (var i = 0; i < l; i++) {
-	                    var c = coordPair(pts[i]);
-	                    line.push(c.coordinates);
-	                    if (c.time) { times.push(c.time); }
-	                    if (c.heartRate) { heartRates.push(c.heartRate); }
-	                }
-	                return {
-	                    line: line,
-	                    times: times,
-	                    heartRates: heartRates
-	                };
-	            }
-	            function getTrack(node) {
-	                var segments = get(node, 'trkseg'),
-	                    track = [],
-	                    times = [],
-	                    heartRates = [],
-	                    line;
-	                for (var i = 0; i < segments.length; i++) {
-	                    line = getPoints(segments[i], 'trkpt');
-	                    if (line) {
-	                        if (line.line) { track.push(line.line); }
-	                        if (line.times && line.times.length) { times.push(line.times); }
-	                        if (line.heartRates && line.heartRates.length) { heartRates.push(line.heartRates); }
-	                    }
-	                }
-	                if (track.length === 0) { return; }
-	                var properties = getProperties(node);
-	                extend(properties, getLineStyle(get1(node, 'extensions')));
-	                if (times.length) { properties.coordTimes = track.length === 1 ? times[0] : times; }
-	                if (heartRates.length) { properties.heartRates = track.length === 1 ? heartRates[0] : heartRates; }
-	                return {
-	                    type: 'Feature',
-	                    properties: properties,
-	                    geometry: {
-	                        type: track.length === 1 ? 'LineString' : 'MultiLineString',
-	                        coordinates: track.length === 1 ? track[0] : track
-	                    }
-	                };
-	            }
-	            function getRoute(node) {
-	                var line = getPoints(node, 'rtept');
-	                if (!line.line) { return; }
-	                var prop = getProperties(node);
-	                extend(prop, getLineStyle(get1(node, 'extensions')));
-	                var routeObj = {
-	                    type: 'Feature',
-	                    properties: prop,
-	                    geometry: {
-	                        type: 'LineString',
-	                        coordinates: line.line
-	                    }
-	                };
-	                return routeObj;
-	            }
-	            function getPoint(node) {
-	                var prop = getProperties(node);
-	                extend(prop, getMulti(node, ['sym']));
-	                return {
-	                    type: 'Feature',
-	                    properties: prop,
-	                    geometry: {
-	                        type: 'Point',
-	                        coordinates: coordPair(node).coordinates
-	                    }
-	                };
-	            }
-	            function getLineStyle(extensions) {
-	                var style = {};
-	                if (extensions) {
-	                    var lineStyle = get1(extensions, 'line');
-	                    if (lineStyle) {
-	                        var color = nodeVal(get1(lineStyle, 'color')),
-	                            opacity = parseFloat(nodeVal(get1(lineStyle, 'opacity'))),
-	                            width = parseFloat(nodeVal(get1(lineStyle, 'width')));
-	                        if (color) { style.stroke = color; }
-	                        if (!isNaN(opacity)) { style['stroke-opacity'] = opacity; }
-	                        // GPX width is in mm, convert to px with 96 px per inch
-	                        if (!isNaN(width)) { style['stroke-width'] = width * 96 / 25.4; }
-	                    }
-	                }
-	                return style;
-	            }
-	            function getProperties(node) {
-	                var prop = getMulti(node, ['name', 'cmt', 'desc', 'type', 'time', 'keywords']),
-	                    links = get(node, 'link');
-	                if (links.length) { prop.links = []; }
-	                for (var i = 0, link; i < links.length; i++) {
-	                    link = { href: attr(links[i], 'href') };
-	                    extend(link, getMulti(links[i], ['text', 'type']));
-	                    prop.links.push(link);
-	                }
-	                return prop;
-	            }
-	            return gj;
-	        }
-	    };
-	    return t;
-	})();
+	function xml2str(node) {
+	  if (node.xml !== undefined) return node.xml;
 
-	{ module.exports = toGeoJSON; }
-	});
+	  if (node.tagName) {
+	    var output = node.tagName;
 
-	var _initialized = false;
-	var _enabled = false;
-	var _geojson;
+	    for (var i = 0; i < node.attributes.length; i++) {
+	      output += node.attributes[i].name + node.attributes[i].value;
+	    }
 
+	    for (var _i9 = 0; _i9 < node.childNodes.length; _i9++) {
+	      output += xml2str(node.childNodes[_i9]);
+	    }
 
-	function svgData(projection, context, dispatch) {
-	    var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-	    var _showLabels = true;
-	    var detected = utilDetect();
-	    var layer = select(null);
-	    var _vtService;
-	    var _fileList;
-	    var _template;
-	    var _src;
+	    return output;
+	  }
 
+	  if (node.nodeName === "#text") {
+	    return (node.nodeValue || node.value || "").trim();
+	  }
 
-	    function init() {
-	        if (_initialized) { return; }  // run once
+	  if (node.nodeName === "#cdata-section") {
+	    return node.nodeValue;
+	  }
 
-	        _geojson = {};
-	        _enabled = true;
+	  return "";
+	}
 
-	        function over() {
-	            event.stopPropagation();
-	            event.preventDefault();
-	            event.dataTransfer.dropEffect = 'copy';
-	        }
+	var geotypes = ["Polygon", "LineString", "Point", "Track", "gx:Track"];
 
-	        context.container()
-	            .attr('dropzone', 'copy')
-	            .on('drop.svgData', function() {
-	                event.stopPropagation();
-	                event.preventDefault();
-	                if (!detected.filedrop) { return; }
-	                drawData.fileList(event.dataTransfer.files);
-	            })
-	            .on('dragenter.svgData', over)
-	            .on('dragexit.svgData', over)
-	            .on('dragover.svgData', over);
+	function kmlColor(properties, elem, prefix) {
+	  var v = nodeVal(get1(elem, "color")) || "";
+	  var colorProp = prefix == "stroke" || prefix === "fill" ? prefix : prefix + "-color";
 
-	        _initialized = true;
-	    }
+	  if (v.substr(0, 1) === "#") {
+	    v = v.substr(1);
+	  }
 
+	  if (v.length === 6 || v.length === 3) {
+	    properties[colorProp] = v;
+	  } else if (v.length === 8) {
+	    properties[prefix + "-opacity"] = parseInt(v.substr(0, 2), 16) / 255;
+	    properties[colorProp] = "#" + v.substr(6, 2) + v.substr(4, 2) + v.substr(2, 2);
+	  }
+	}
 
-	    function getService() {
-	        if (services.vectorTile && !_vtService) {
-	            _vtService = services.vectorTile;
-	            _vtService.event.on('loadedData', throttledRedraw);
-	        } else if (!services.vectorTile && _vtService) {
-	            _vtService = null;
-	        }
+	function numericProperty(properties, elem, source, target) {
+	  var val = parseFloat(nodeVal(get1(elem, source)));
+	  if (!isNaN(val)) properties[target] = val;
+	}
 
-	        return _vtService;
-	    }
+	function gxCoords(root) {
+	  var elems = root.getElementsByTagName("coord");
+	  var coords = [];
+	  var times = [];
+	  if (elems.length === 0) elems = root.getElementsByTagName("gx:coord");
 
+	  for (var i = 0; i < elems.length; i++) {
+	    coords.push(nodeVal(elems[i]).split(" ").map(parseFloat));
+	  }
 
-	    function showLayer() {
-	        layerOn();
+	  var timeElems = root.getElementsByTagName("when");
 
-	        layer
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1)
-	            .on('end', function () { dispatch.call('change'); });
-	    }
+	  for (var j = 0; j < timeElems.length; j++) {
+	    times.push(nodeVal(timeElems[j]));
+	  }
 
+	  return {
+	    coords: coords,
+	    times: times
+	  };
+	}
 
-	    function hideLayer() {
-	        throttledRedraw.cancel();
+	function getGeometry(root) {
+	  var geomNode;
+	  var geomNodes;
+	  var i;
+	  var j;
+	  var k;
+	  var geoms = [];
+	  var coordTimes = [];
 
-	        layer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0)
-	            .on('end', layerOff);
-	    }
+	  if (get1(root, "MultiGeometry")) {
+	    return getGeometry(get1(root, "MultiGeometry"));
+	  }
 
+	  if (get1(root, "MultiTrack")) {
+	    return getGeometry(get1(root, "MultiTrack"));
+	  }
 
-	    function layerOn() {
-	        layer.style('display', 'block');
-	    }
+	  if (get1(root, "gx:MultiTrack")) {
+	    return getGeometry(get1(root, "gx:MultiTrack"));
+	  }
 
+	  for (i = 0; i < geotypes.length; i++) {
+	    geomNodes = root.getElementsByTagName(geotypes[i]);
 
-	    function layerOff() {
-	        layer.selectAll('.viewfield-group').remove();
-	        layer.style('display', 'none');
-	    }
+	    if (geomNodes) {
+	      for (j = 0; j < geomNodes.length; j++) {
+	        geomNode = geomNodes[j];
 
+	        if (geotypes[i] === "Point") {
+	          geoms.push({
+	            type: "Point",
+	            coordinates: coord1(nodeVal(get1(geomNode, "coordinates")))
+	          });
+	        } else if (geotypes[i] === "LineString") {
+	          geoms.push({
+	            type: "LineString",
+	            coordinates: coord(nodeVal(get1(geomNode, "coordinates")))
+	          });
+	        } else if (geotypes[i] === "Polygon") {
+	          var rings = geomNode.getElementsByTagName("LinearRing"),
+	              coords = [];
 
-	    // ensure that all geojson features in a collection have IDs
-	    function ensureIDs(gj) {
-	        if (!gj) { return null; }
+	          for (k = 0; k < rings.length; k++) {
+	            coords.push(coord(nodeVal(get1(rings[k], "coordinates"))));
+	          }
 
-	        if (gj.type === 'FeatureCollection') {
-	            for (var i = 0; i < gj.features.length; i++) {
-	                ensureFeatureID(gj.features[i]);
-	            }
-	        } else {
-	            ensureFeatureID(gj);
+	          geoms.push({
+	            type: "Polygon",
+	            coordinates: coords
+	          });
+	        } else if (geotypes[i] === "Track" || geotypes[i] === "gx:Track") {
+	          var track = gxCoords(geomNode);
+	          geoms.push({
+	            type: "LineString",
+	            coordinates: track.coords
+	          });
+	          if (track.times.length) coordTimes.push(track.times);
 	        }
-	        return gj;
+	      }
 	    }
+	  }
 
+	  return {
+	    geoms: geoms,
+	    coordTimes: coordTimes
+	  };
+	}
 
-	    // ensure that each single Feature object has a unique ID
-	    function ensureFeatureID(feature) {
-	        if (!feature) { return; }
-	        feature.__featurehash__ = utilHashcode(fastJsonStableStringify(feature));
-	        return feature;
-	    }
+	function getPlacemark(root, styleIndex, styleMapIndex, styleByHash) {
+	  var geomsAndTimes = getGeometry(root);
+	  var i;
+	  var properties = {};
+	  var name = nodeVal(get1(root, "name"));
+	  var address = nodeVal(get1(root, "address"));
+	  var styleUrl = nodeVal(get1(root, "styleUrl"));
+	  var description = nodeVal(get1(root, "description"));
+	  var timeSpan = get1(root, "TimeSpan");
+	  var timeStamp = get1(root, "TimeStamp");
+	  var extendedData = get1(root, "ExtendedData");
+	  var iconStyle = get1(root, "IconStyle");
+	  var labelStyle = get1(root, "LabelStyle");
+	  var lineStyle = get1(root, "LineStyle");
+	  var polyStyle = get1(root, "PolyStyle");
+	  var visibility = get1(root, "visibility");
+	  if (name) properties.name = name;
+	  if (address) properties.address = address;
 
+	  if (styleUrl) {
+	    if (styleUrl[0] !== "#") {
+	      styleUrl = "#" + styleUrl;
+	    }
 
-	    // Prefer an array of Features instead of a FeatureCollection
-	    function getFeatures(gj) {
-	        if (!gj) { return []; }
+	    properties.styleUrl = styleUrl;
 
-	        if (gj.type === 'FeatureCollection') {
-	            return gj.features;
-	        } else {
-	            return [gj];
-	        }
+	    if (styleIndex[styleUrl]) {
+	      properties.styleHash = styleIndex[styleUrl];
 	    }
 
+	    if (styleMapIndex[styleUrl]) {
+	      properties.styleMapHash = styleMapIndex[styleUrl];
+	      properties.styleHash = styleIndex[styleMapIndex[styleUrl].normal];
+	    } // Try to populate the lineStyle or polyStyle since we got the style hash
+
 
-	    function featureKey(d) {
-	        return d.__featurehash__;
+	    var style = styleByHash[properties.styleHash];
+
+	    if (style) {
+	      if (!iconStyle) iconStyle = get1(style, "IconStyle");
+	      if (!labelStyle) labelStyle = get1(style, "LabelStyle");
+	      if (!lineStyle) lineStyle = get1(style, "LineStyle");
+	      if (!polyStyle) polyStyle = get1(style, "PolyStyle");
 	    }
+	  }
 
+	  if (description) properties.description = description;
 
-	    function isPolygon(d) {
-	        return d.geometry.type === 'Polygon' || d.geometry.type === 'MultiPolygon';
+	  if (timeSpan) {
+	    var begin = nodeVal(get1(timeSpan, "begin"));
+	    var end = nodeVal(get1(timeSpan, "end"));
+	    properties.timespan = {
+	      begin: begin,
+	      end: end
+	    };
+	  }
+
+	  if (timeStamp) {
+	    properties.timestamp = nodeVal(get1(timeStamp, "when"));
+	  }
+
+	  if (iconStyle) {
+	    kmlColor(properties, iconStyle, "icon");
+	    numericProperty(properties, iconStyle, "scale", "icon-scale");
+	    numericProperty(properties, iconStyle, "heading", "icon-heading");
+	    var hotspot = get1(iconStyle, "hotSpot");
+
+	    if (hotspot) {
+	      var left = parseFloat(hotspot.getAttribute("x"));
+	      var top = parseFloat(hotspot.getAttribute("y"));
+	      if (!isNaN(left) && !isNaN(top)) properties["icon-offset"] = [left, top];
 	    }
 
+	    var icon = get1(iconStyle, "Icon");
 
-	    function clipPathID(d) {
-	        return 'ideditor-data-' + d.__featurehash__ + '-clippath';
+	    if (icon) {
+	      var href = nodeVal(get1(icon, "href"));
+	      if (href) properties.icon = href;
 	    }
+	  }
+
+	  if (labelStyle) {
+	    kmlColor(properties, labelStyle, "label");
+	    numericProperty(properties, labelStyle, "scale", "label-scale");
+	  }
+
+	  if (lineStyle) {
+	    kmlColor(properties, lineStyle, "stroke");
+	    numericProperty(properties, lineStyle, "width", "stroke-width");
+	  }
+
+	  if (polyStyle) {
+	    kmlColor(properties, polyStyle, "fill");
+	    var fill = nodeVal(get1(polyStyle, "fill"));
+	    var outline = nodeVal(get1(polyStyle, "outline"));
+	    if (fill) properties["fill-opacity"] = fill === "1" ? properties["fill-opacity"] || 1 : 0;
+	    if (outline) properties["stroke-opacity"] = outline === "1" ? properties["stroke-opacity"] || 1 : 0;
+	  }
 
+	  if (extendedData) {
+	    var datas = extendedData.getElementsByTagName("Data"),
+	        simpleDatas = extendedData.getElementsByTagName("SimpleData");
 
-	    function featureClasses(d) {
-	        return [
-	            'data' + d.__featurehash__,
-	            d.geometry.type,
-	            isPolygon(d) ? 'area' : '',
-	            d.__layerID__ || ''
-	        ].filter(Boolean).join(' ');
+	    for (i = 0; i < datas.length; i++) {
+	      properties[datas[i].getAttribute("name")] = nodeVal(get1(datas[i], "value"));
 	    }
 
+	    for (i = 0; i < simpleDatas.length; i++) {
+	      properties[simpleDatas[i].getAttribute("name")] = nodeVal(simpleDatas[i]);
+	    }
+	  }
 
-	    function drawData(selection) {
-	        var vtService = getService();
-	        var getPath = svgPath(projection).geojson;
-	        var getAreaPath = svgPath(projection, null, true).geojson;
-	        var hasData = drawData.hasData();
+	  if (visibility) {
+	    properties.visibility = nodeVal(visibility);
+	  }
 
-	        layer = selection.selectAll('.layer-mapdata')
-	            .data(_enabled && hasData ? [0] : []);
+	  if (geomsAndTimes.coordTimes.length) {
+	    properties.coordinateProperties = {
+	      times: geomsAndTimes.coordTimes.length === 1 ? geomsAndTimes.coordTimes[0] : geomsAndTimes.coordTimes
+	    };
+	  }
 
-	        layer.exit()
-	            .remove();
+	  var feature = {
+	    type: "Feature",
+	    geometry: geomsAndTimes.geoms.length === 0 ? null : geomsAndTimes.geoms.length === 1 ? geomsAndTimes.geoms[0] : {
+	      type: "GeometryCollection",
+	      geometries: geomsAndTimes.geoms
+	    },
+	    properties: properties
+	  };
+	  if (root.getAttribute("id")) feature.id = root.getAttribute("id");
+	  return feature;
+	}
 
-	        layer = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-mapdata')
-	            .merge(layer);
+	function kmlGen(doc) {
+	  var styleIndex, styleByHash, styleMapIndex, placemarks, styles, styleMaps, k, hash, l, pairs, pairsMap, m, j, feature;
+	  return regeneratorRuntime.wrap(function kmlGen$(_context3) {
+	    while (1) {
+	      switch (_context3.prev = _context3.next) {
+	        case 0:
+	          // styleindex keeps track of hashed styles in order to match feature
+	          styleIndex = {};
+	          styleByHash = {}; // stylemapindex keeps track of style maps to expose in properties
 
-	        var surface = context.surface();
-	        if (!surface || surface.empty()) { return; }  // not ready to draw yet, starting up
+	          styleMapIndex = {}; // atomic geospatial types supported by KML - MultiGeometry is
+	          // handled separately
+	          // all root placemarks in the file
 
+	          placemarks = doc.getElementsByTagName("Placemark");
+	          styles = doc.getElementsByTagName("Style");
+	          styleMaps = doc.getElementsByTagName("StyleMap");
 
-	        // Gather data
-	        var geoData, polygonData;
-	        if (_template && vtService) {   // fetch data from vector tile service
-	            var sourceID = _template;
-	            vtService.loadTiles(sourceID, _template, projection);
-	            geoData = vtService.data(sourceID, projection);
-	        } else {
-	            geoData = getFeatures(_geojson);
-	        }
-	        geoData = geoData.filter(getPath);
-	        polygonData = geoData.filter(isPolygon);
+	          for (k = 0; k < styles.length; k++) {
+	            hash = okhash(xml2str(styles[k])).toString(16);
+	            styleIndex["#" + styles[k].getAttribute("id")] = hash;
+	            styleByHash[hash] = styles[k];
+	          }
 
+	          for (l = 0; l < styleMaps.length; l++) {
+	            styleIndex["#" + styleMaps[l].getAttribute("id")] = okhash(xml2str(styleMaps[l])).toString(16);
+	            pairs = styleMaps[l].getElementsByTagName("Pair");
+	            pairsMap = {};
 
-	        // Draw clip paths for polygons
-	        var clipPaths = surface.selectAll('defs').selectAll('.clipPath-data')
-	           .data(polygonData, featureKey);
+	            for (m = 0; m < pairs.length; m++) {
+	              pairsMap[nodeVal(get1(pairs[m], "key"))] = nodeVal(get1(pairs[m], "styleUrl"));
+	            }
 
-	        clipPaths.exit()
-	           .remove();
+	            styleMapIndex["#" + styleMaps[l].getAttribute("id")] = pairsMap;
+	          }
 
-	        var clipPathsEnter = clipPaths.enter()
-	           .append('clipPath')
-	           .attr('class', 'clipPath-data')
-	           .attr('id', clipPathID);
+	          j = 0;
 
-	        clipPathsEnter
-	           .append('path');
+	        case 9:
+	          if (!(j < placemarks.length)) {
+	            _context3.next = 17;
+	            break;
+	          }
 
-	        clipPaths.merge(clipPathsEnter)
-	           .selectAll('path')
-	           .attr('d', getAreaPath);
+	          feature = getPlacemark(placemarks[j], styleIndex, styleMapIndex, styleByHash);
 
+	          if (!feature) {
+	            _context3.next = 14;
+	            break;
+	          }
 
-	        // Draw fill, shadow, stroke layers
-	        var datagroups = layer
-	            .selectAll('g.datagroup')
-	            .data(['fill', 'shadow', 'stroke']);
+	          _context3.next = 14;
+	          return feature;
 
-	        datagroups = datagroups.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'datagroup datagroup-' + d; })
-	            .merge(datagroups);
+	        case 14:
+	          j++;
+	          _context3.next = 9;
+	          break;
 
+	        case 17:
+	        case "end":
+	          return _context3.stop();
+	      }
+	    }
+	  }, _marked3);
+	}
 
-	        // Draw paths
-	        var pathData = {
-	            fill: polygonData,
-	            shadow: geoData,
-	            stroke: geoData
-	        };
+	function kml(doc) {
+	  return {
+	    type: "FeatureCollection",
+	    features: Array.from(kmlGen(doc))
+	  };
+	}
 
-	        var paths = datagroups
-	            .selectAll('path')
-	            .data(function(layer) { return pathData[layer]; }, featureKey);
-
-	        // exit
-	        paths.exit()
-	            .remove();
-
-	        // enter/update
-	        paths = paths.enter()
-	            .append('path')
-	            .attr('class', function(d) {
-	                var datagroup = this.parentNode.__data__;
-	                return 'pathdata ' + datagroup + ' ' + featureClasses(d);
-	            })
-	            .attr('clip-path', function(d) {
-	                var datagroup = this.parentNode.__data__;
-	                return datagroup === 'fill' ? ('url(#' + clipPathID(d) + ')') : null;
-	            })
-	            .merge(paths)
-	            .attr('d', function(d) {
-	                var datagroup = this.parentNode.__data__;
-	                return datagroup === 'fill' ? getAreaPath(d) : getPath(d);
-	            });
+	var _initialized = false;
+	var _enabled = false;
 
+	var _geojson;
 
-	        // Draw labels
-	        layer
-	            .call(drawLabels, 'label-halo', geoData)
-	            .call(drawLabels, 'label', geoData);
+	function svgData(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
+	  var _showLabels = true;
+	  var detected = utilDetect();
+	  var layer = select(null);
 
-	        function drawLabels(selection, textClass, data) {
-	            var labelPath = d3_geoPath(projection);
-	            var labelData = data.filter(function(d) {
-	                return _showLabels && d.properties && (d.properties.desc || d.properties.name);
-	            });
+	  var _vtService;
 
-	            var labels = selection.selectAll('text.' + textClass)
-	                .data(labelData, featureKey);
+	  var _fileList;
 
-	            // exit
-	            labels.exit()
-	                .remove();
+	  var _template;
 
-	            // enter/update
-	            labels = labels.enter()
-	                .append('text')
-	                .attr('class', function(d) { return textClass + ' ' + featureClasses(d); })
-	                .merge(labels)
-	                .text(function(d) {
-	                    return d.properties.desc || d.properties.name;
-	                })
-	                .attr('x', function(d) {
-	                    var centroid = labelPath.centroid(d);
-	                    return centroid[0] + 11;
-	                })
-	                .attr('y', function(d) {
-	                    var centroid = labelPath.centroid(d);
-	                    return centroid[1];
-	                });
-	        }
+	  var _src;
+
+	  function init() {
+	    if (_initialized) return; // run once
+
+	    _geojson = {};
+	    _enabled = true;
+
+	    function over(d3_event) {
+	      d3_event.stopPropagation();
+	      d3_event.preventDefault();
+	      d3_event.dataTransfer.dropEffect = 'copy';
+	    }
+
+	    context.container().attr('dropzone', 'copy').on('drop.svgData', function (d3_event) {
+	      d3_event.stopPropagation();
+	      d3_event.preventDefault();
+	      if (!detected.filedrop) return;
+	      drawData.fileList(d3_event.dataTransfer.files);
+	    }).on('dragenter.svgData', over).on('dragexit.svgData', over).on('dragover.svgData', over);
+	    _initialized = true;
+	  }
+
+	  function getService() {
+	    if (services.vectorTile && !_vtService) {
+	      _vtService = services.vectorTile;
+
+	      _vtService.event.on('loadedData', throttledRedraw);
+	    } else if (!services.vectorTile && _vtService) {
+	      _vtService = null;
 	    }
 
+	    return _vtService;
+	  }
+
+	  function showLayer() {
+	    layerOn();
+	    layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
+	      dispatch.call('change');
+	    });
+	  }
+
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    layer.transition().duration(250).style('opacity', 0).on('end', layerOff);
+	  }
+
+	  function layerOn() {
+	    layer.style('display', 'block');
+	  }
+
+	  function layerOff() {
+	    layer.selectAll('.viewfield-group').remove();
+	    layer.style('display', 'none');
+	  } // ensure that all geojson features in a collection have IDs
+
 
-	    function getExtension(fileName) {
-	        if (!fileName) { return; }
+	  function ensureIDs(gj) {
+	    if (!gj) return null;
 
-	        var re = /\.(gpx|kml|(geo)?json)$/i;
-	        var match = fileName.toLowerCase().match(re);
-	        return match && match.length && match[0];
+	    if (gj.type === 'FeatureCollection') {
+	      for (var i = 0; i < gj.features.length; i++) {
+	        ensureFeatureID(gj.features[i]);
+	      }
+	    } else {
+	      ensureFeatureID(gj);
 	    }
 
+	    return gj;
+	  } // ensure that each single Feature object has a unique ID
+
 
-	    function xmlToDom(textdata) {
-	        return (new DOMParser()).parseFromString(textdata, 'text/xml');
+	  function ensureFeatureID(feature) {
+	    if (!feature) return;
+	    feature.__featurehash__ = utilHashcode(fastJsonStableStringify(feature));
+	    return feature;
+	  } // Prefer an array of Features instead of a FeatureCollection
+
+
+	  function getFeatures(gj) {
+	    if (!gj) return [];
+
+	    if (gj.type === 'FeatureCollection') {
+	      return gj.features;
+	    } else {
+	      return [gj];
 	    }
+	  }
 
+	  function featureKey(d) {
+	    return d.__featurehash__;
+	  }
 
-	    drawData.setFile = function(extension, data) {
-	        _template = null;
-	        _fileList = null;
-	        _geojson = null;
-	        _src = null;
+	  function isPolygon(d) {
+	    return d.geometry.type === 'Polygon' || d.geometry.type === 'MultiPolygon';
+	  }
 
-	        var gj;
-	        switch (extension) {
-	            case '.gpx':
-	                gj = togeojson.gpx(xmlToDom(data));
-	                break;
-	            case '.kml':
-	                gj = togeojson.kml(xmlToDom(data));
-	                break;
-	            case '.geojson':
-	            case '.json':
-	                gj = JSON.parse(data);
-	                break;
-	        }
+	  function clipPathID(d) {
+	    return 'ideditor-data-' + d.__featurehash__ + '-clippath';
+	  }
 
-	        gj = gj || {};
-	        if (Object.keys(gj).length) {
-	            _geojson = ensureIDs(gj);
-	            _src = extension + ' data file';
-	            this.fitZoom();
-	        }
+	  function featureClasses(d) {
+	    return ['data' + d.__featurehash__, d.geometry.type, isPolygon(d) ? 'area' : '', d.__layerID__ || ''].filter(Boolean).join(' ');
+	  }
 
-	        dispatch.call('change');
-	        return this;
-	    };
+	  function drawData(selection) {
+	    var vtService = getService();
+	    var getPath = svgPath(projection).geojson;
+	    var getAreaPath = svgPath(projection, null, true).geojson;
+	    var hasData = drawData.hasData();
+	    layer = selection.selectAll('.layer-mapdata').data(_enabled && hasData ? [0] : []);
+	    layer.exit().remove();
+	    layer = layer.enter().append('g').attr('class', 'layer-mapdata').merge(layer);
+	    var surface = context.surface();
+	    if (!surface || surface.empty()) return; // not ready to draw yet, starting up
+	    // Gather data
 
+	    var geoData, polygonData;
 
-	    drawData.showLabels = function(val) {
-	        if (!arguments.length) { return _showLabels; }
+	    if (_template && vtService) {
+	      // fetch data from vector tile service
+	      var sourceID = _template;
+	      vtService.loadTiles(sourceID, _template, projection);
+	      geoData = vtService.data(sourceID, projection);
+	    } else {
+	      geoData = getFeatures(_geojson);
+	    }
+
+	    geoData = geoData.filter(getPath);
+	    polygonData = geoData.filter(isPolygon); // Draw clip paths for polygons
+
+	    var clipPaths = surface.selectAll('defs').selectAll('.clipPath-data').data(polygonData, featureKey);
+	    clipPaths.exit().remove();
+	    var clipPathsEnter = clipPaths.enter().append('clipPath').attr('class', 'clipPath-data').attr('id', clipPathID);
+	    clipPathsEnter.append('path');
+	    clipPaths.merge(clipPathsEnter).selectAll('path').attr('d', getAreaPath); // Draw fill, shadow, stroke layers
+
+	    var datagroups = layer.selectAll('g.datagroup').data(['fill', 'shadow', 'stroke']);
+	    datagroups = datagroups.enter().append('g').attr('class', function (d) {
+	      return 'datagroup datagroup-' + d;
+	    }).merge(datagroups); // Draw paths
+
+	    var pathData = {
+	      fill: polygonData,
+	      shadow: geoData,
+	      stroke: geoData
+	    };
+	    var paths = datagroups.selectAll('path').data(function (layer) {
+	      return pathData[layer];
+	    }, featureKey); // exit
+
+	    paths.exit().remove(); // enter/update
+
+	    paths = paths.enter().append('path').attr('class', function (d) {
+	      var datagroup = this.parentNode.__data__;
+	      return 'pathdata ' + datagroup + ' ' + featureClasses(d);
+	    }).attr('clip-path', function (d) {
+	      var datagroup = this.parentNode.__data__;
+	      return datagroup === 'fill' ? 'url(#' + clipPathID(d) + ')' : null;
+	    }).merge(paths).attr('d', function (d) {
+	      var datagroup = this.parentNode.__data__;
+	      return datagroup === 'fill' ? getAreaPath(d) : getPath(d);
+	    }); // Draw labels
+
+	    layer.call(drawLabels, 'label-halo', geoData).call(drawLabels, 'label', geoData);
+
+	    function drawLabels(selection, textClass, data) {
+	      var labelPath = d3_geoPath(projection);
+	      var labelData = data.filter(function (d) {
+	        return _showLabels && d.properties && (d.properties.desc || d.properties.name);
+	      });
+	      var labels = selection.selectAll('text.' + textClass).data(labelData, featureKey); // exit
+
+	      labels.exit().remove(); // enter/update
+
+	      labels = labels.enter().append('text').attr('class', function (d) {
+	        return textClass + ' ' + featureClasses(d);
+	      }).merge(labels).text(function (d) {
+	        return d.properties.desc || d.properties.name;
+	      }).attr('x', function (d) {
+	        var centroid = labelPath.centroid(d);
+	        return centroid[0] + 11;
+	      }).attr('y', function (d) {
+	        var centroid = labelPath.centroid(d);
+	        return centroid[1];
+	      });
+	    }
+	  }
 
-	        _showLabels = val;
-	        return this;
-	    };
+	  function getExtension(fileName) {
+	    if (!fileName) return;
+	    var re = /\.(gpx|kml|(geo)?json)$/i;
+	    var match = fileName.toLowerCase().match(re);
+	    return match && match.length && match[0];
+	  }
 
+	  function xmlToDom(textdata) {
+	    return new DOMParser().parseFromString(textdata, 'text/xml');
+	  }
 
-	    drawData.enabled = function(val) {
-	        if (!arguments.length) { return _enabled; }
+	  drawData.setFile = function (extension, data) {
+	    _template = null;
+	    _fileList = null;
+	    _geojson = null;
+	    _src = null;
+	    var gj;
 
-	        _enabled = val;
-	        if (_enabled) {
-	            showLayer();
-	        } else {
-	            hideLayer();
-	        }
+	    switch (extension) {
+	      case '.gpx':
+	        gj = gpx(xmlToDom(data));
+	        break;
 
-	        dispatch.call('change');
-	        return this;
-	    };
+	      case '.kml':
+	        gj = kml(xmlToDom(data));
+	        break;
 
+	      case '.geojson':
+	      case '.json':
+	        gj = JSON.parse(data);
+	        break;
+	    }
 
-	    drawData.hasData = function() {
-	        var gj = _geojson || {};
-	        return !!(_template || Object.keys(gj).length);
-	    };
+	    gj = gj || {};
 
+	    if (Object.keys(gj).length) {
+	      _geojson = ensureIDs(gj);
+	      _src = extension + ' data file';
+	      this.fitZoom();
+	    }
 
-	    drawData.template = function(val, src) {
-	        if (!arguments.length) { return _template; }
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	        // test source against OSM imagery blocklists..
-	        var osm = context.connection();
-	        if (osm) {
-	            var blocklists = osm.imageryBlocklists();
-	            var fail = false;
-	            var tested = 0;
-	            var regex;
-
-	            for (var i = 0; i < blocklists.length; i++) {
-	                regex = blocklists[i];
-	                fail = regex.test(val);
-	                tested++;
-	                if (fail) { break; }
-	            }
+	  drawData.showLabels = function (val) {
+	    if (!arguments.length) return _showLabels;
+	    _showLabels = val;
+	    return this;
+	  };
 
-	            // ensure at least one test was run.
-	            if (!tested) {
-	                regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
-	                fail = regex.test(val);
-	            }
-	        }
+	  drawData.enabled = function (val) {
+	    if (!arguments.length) return _enabled;
+	    _enabled = val;
 
-	        _template = val;
-	        _fileList = null;
-	        _geojson = null;
+	    if (_enabled) {
+	      showLayer();
+	    } else {
+	      hideLayer();
+	    }
 
-	        // strip off the querystring/hash from the template,
-	        // it often includes the access token
-	        _src = src || ('vectortile:' + val.split(/[?#]/)[0]);
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	        dispatch.call('change');
-	        return this;
-	    };
+	  drawData.hasData = function () {
+	    var gj = _geojson || {};
+	    return !!(_template || Object.keys(gj).length);
+	  };
 
+	  drawData.template = function (val, src) {
+	    if (!arguments.length) return _template; // test source against OSM imagery blocklists..
 
-	    drawData.geojson = function(gj, src) {
-	        if (!arguments.length) { return _geojson; }
+	    var osm = context.connection();
 
-	        _template = null;
-	        _fileList = null;
-	        _geojson = null;
-	        _src = null;
+	    if (osm) {
+	      var blocklists = osm.imageryBlocklists();
+	      var fail = false;
+	      var tested = 0;
+	      var regex;
 
-	        gj = gj || {};
-	        if (Object.keys(gj).length) {
-	            _geojson = ensureIDs(gj);
-	            _src = src || 'unknown.geojson';
-	        }
+	      for (var i = 0; i < blocklists.length; i++) {
+	        regex = blocklists[i];
+	        fail = regex.test(val);
+	        tested++;
+	        if (fail) break;
+	      } // ensure at least one test was run.
 
-	        dispatch.call('change');
-	        return this;
-	    };
 
+	      if (!tested) {
+	        regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
+	        fail = regex.test(val);
+	      }
+	    }
 
-	    drawData.fileList = function(fileList) {
-	        if (!arguments.length) { return _fileList; }
+	    _template = val;
+	    _fileList = null;
+	    _geojson = null; // strip off the querystring/hash from the template,
+	    // it often includes the access token
 
-	        _template = null;
-	        _fileList = fileList;
-	        _geojson = null;
-	        _src = null;
+	    _src = src || 'vectortile:' + val.split(/[?#]/)[0];
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	        if (!fileList || !fileList.length) { return this; }
-	        var f = fileList[0];
-	        var extension = getExtension(f.name);
-	        var reader = new FileReader();
-	        reader.onload = (function() {
-	            return function(e) {
-	                drawData.setFile(extension, e.target.result);
-	            };
-	        })();
+	  drawData.geojson = function (gj, src) {
+	    if (!arguments.length) return _geojson;
+	    _template = null;
+	    _fileList = null;
+	    _geojson = null;
+	    _src = null;
+	    gj = gj || {};
 
-	        reader.readAsText(f);
+	    if (Object.keys(gj).length) {
+	      _geojson = ensureIDs(gj);
+	      _src = src || 'unknown.geojson';
+	    }
 
-	        return this;
-	    };
+	    dispatch.call('change');
+	    return this;
+	  };
 
+	  drawData.fileList = function (fileList) {
+	    if (!arguments.length) return _fileList;
+	    _template = null;
+	    _fileList = fileList;
+	    _geojson = null;
+	    _src = null;
+	    if (!fileList || !fileList.length) return this;
+	    var f = fileList[0];
+	    var extension = getExtension(f.name);
+	    var reader = new FileReader();
+
+	    reader.onload = function () {
+	      return function (e) {
+	        drawData.setFile(extension, e.target.result);
+	      };
+	    }();
 
-	    drawData.url = function(url, defaultExtension) {
-	        _template = null;
-	        _fileList = null;
-	        _geojson = null;
-	        _src = null;
-
-	        // strip off any querystring/hash from the url before checking extension
-	        var testUrl = url.split(/[?#]/)[0];
-	        var extension = getExtension(testUrl) || defaultExtension;
-	        if (extension) {
-	            _template = null;
-	            d3_text(url)
-	                .then(function(data) {
-	                    drawData.setFile(extension, data);
-	                })
-	                .catch(function() {
-	                    /* ignore */
-	                });
+	    reader.readAsText(f);
+	    return this;
+	  };
 
-	        } else {
-	            drawData.template(url);
-	        }
+	  drawData.url = function (url, defaultExtension) {
+	    _template = null;
+	    _fileList = null;
+	    _geojson = null;
+	    _src = null; // strip off any querystring/hash from the url before checking extension
 
-	        return this;
-	    };
+	    var testUrl = url.split(/[?#]/)[0];
+	    var extension = getExtension(testUrl) || defaultExtension;
 
+	    if (extension) {
+	      _template = null;
+	      d3_text(url).then(function (data) {
+	        drawData.setFile(extension, data);
+	      })["catch"](function () {
+	        /* ignore */
+	      });
+	    } else {
+	      drawData.template(url);
+	    }
 
-	    drawData.getSrc = function() {
-	        return _src || '';
-	    };
+	    return this;
+	  };
 
+	  drawData.getSrc = function () {
+	    return _src || '';
+	  };
 
-	    drawData.fitZoom = function() {
-	        var features = getFeatures(_geojson);
-	        if (!features.length) { return; }
-
-	        var map = context.map();
-	        var viewport = map.trimmedExtent().polygon();
-	        var coords = features.reduce(function(coords, feature) {
-	            var geom = feature.geometry;
-	            if (!geom) { return coords; }
-
-	            var c = geom.coordinates;
-
-	            /* eslint-disable no-fallthrough */
-	            switch (geom.type) {
-	                case 'Point':
-	                    c = [c];
-	                case 'MultiPoint':
-	                case 'LineString':
-	                    break;
-
-	                case 'MultiPolygon':
-	                    c = utilArrayFlatten(c);
-	                case 'Polygon':
-	                case 'MultiLineString':
-	                    c = utilArrayFlatten(c);
-	                    break;
-	            }
-	            /* eslint-enable no-fallthrough */
+	  drawData.fitZoom = function () {
+	    var features = getFeatures(_geojson);
+	    if (!features.length) return;
+	    var map = context.map();
+	    var viewport = map.trimmedExtent().polygon();
+	    var coords = features.reduce(function (coords, feature) {
+	      var geom = feature.geometry;
+	      if (!geom) return coords;
+	      var c = geom.coordinates;
+	      /* eslint-disable no-fallthrough */
 
-	            return utilArrayUnion(coords, c);
-	        }, []);
+	      switch (geom.type) {
+	        case 'Point':
+	          c = [c];
 
-	        if (!geoPolygonIntersectsPolygon(viewport, coords, true)) {
-	            var extent = geoExtent(d3_geoBounds({ type: 'LineString', coordinates: coords }));
-	            map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
-	        }
+	        case 'MultiPoint':
+	        case 'LineString':
+	          break;
 
-	        return this;
-	    };
+	        case 'MultiPolygon':
+	          c = utilArrayFlatten(c);
+
+	        case 'Polygon':
+	        case 'MultiLineString':
+	          c = utilArrayFlatten(c);
+	          break;
+	      }
+	      /* eslint-enable no-fallthrough */
+
+
+	      return utilArrayUnion(coords, c);
+	    }, []);
+
+	    if (!geoPolygonIntersectsPolygon(viewport, coords, true)) {
+	      var extent = geoExtent(d3_geoBounds({
+	        type: 'LineString',
+	        coordinates: coords
+	      }));
+	      map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
+	    }
 
+	    return this;
+	  };
 
-	    init();
-	    return drawData;
+	  init();
+	  return drawData;
 	}
 
 	function svgDebug(projection, context) {
-
 	  function drawDebug(selection) {
 	    var showTile = context.getDebug('tile');
 	    var showCollision = context.getDebug('collision');
 	    var showImagery = context.getDebug('imagery');
 	    var showTouchTargets = context.getDebug('target');
 	    var showDownloaded = context.getDebug('downloaded');
-
 	    var debugData = [];
+
 	    if (showTile) {
-	      debugData.push({ class: 'red', label: 'tile' });
+	      debugData.push({
+	        "class": 'red',
+	        label: 'tile'
+	      });
 	    }
+
 	    if (showCollision) {
-	      debugData.push({ class: 'yellow', label: 'collision' });
+	      debugData.push({
+	        "class": 'yellow',
+	        label: 'collision'
+	      });
 	    }
+
 	    if (showImagery) {
-	      debugData.push({ class: 'orange', label: 'imagery' });
+	      debugData.push({
+	        "class": 'orange',
+	        label: 'imagery'
+	      });
 	    }
+
 	    if (showTouchTargets) {
-	      debugData.push({ class: 'pink', label: 'touchTargets' });
+	      debugData.push({
+	        "class": 'pink',
+	        label: 'touchTargets'
+	      });
 	    }
+
 	    if (showDownloaded) {
-	      debugData.push({ class: 'purple', label: 'downloaded' });
+	      debugData.push({
+	        "class": 'purple',
+	        label: 'downloaded'
+	      });
 	    }
 
+	    var legend = context.container().select('.main-content').selectAll('.debug-legend').data(debugData.length ? [0] : []);
+	    legend.exit().remove();
+	    legend = legend.enter().append('div').attr('class', 'fillD debug-legend').merge(legend);
+	    var legendItems = legend.selectAll('.debug-legend-item').data(debugData, function (d) {
+	      return d.label;
+	    });
+	    legendItems.exit().remove();
+	    legendItems.enter().append('span').attr('class', function (d) {
+	      return "debug-legend-item ".concat(d["class"]);
+	    }).text(function (d) {
+	      return d.label;
+	    });
+	    var layer = selection.selectAll('.layer-debug').data(showImagery || showDownloaded ? [0] : []);
+	    layer.exit().remove();
+	    layer = layer.enter().append('g').attr('class', 'layer-debug').merge(layer); // imagery
 
-	    var legend = context.container().select('.main-content')
-	      .selectAll('.debug-legend')
-	      .data(debugData.length ? [0] : []);
-
-	    legend.exit()
-	      .remove();
-
-	    legend = legend.enter()
-	      .append('div')
-	      .attr('class', 'fillD debug-legend')
-	      .merge(legend);
-
-
-	    var legendItems = legend.selectAll('.debug-legend-item')
-	      .data(debugData, function (d) { return d.label; });
-
-	    legendItems.exit()
-	      .remove();
-
-	    legendItems.enter()
-	      .append('span')
-	      .attr('class', function (d) { return ("debug-legend-item " + (d.class)); })
-	      .text(function (d) { return d.label; });
-
-
-	    var layer = selection.selectAll('.layer-debug')
-	      .data(showImagery || showDownloaded ? [0] : []);
-
-	    layer.exit()
-	      .remove();
-
-	    layer = layer.enter()
-	      .append('g')
-	      .attr('class', 'layer-debug')
-	      .merge(layer);
-
-
-	    // imagery
 	    var extent = context.map().extent();
-	    _mainFileFetcher.get('imagery')
-	      .then(function (d) {
-	        var hits = (showImagery && d.query.bbox(extent.rectangle(), true)) || [];
-	        var features = hits.map(function (d) { return d.features[d.id]; });
-
-	        var imagery = layer.selectAll('path.debug-imagery')
-	          .data(features);
-
-	        imagery.exit()
-	          .remove();
-
-	        imagery.enter()
-	          .append('path')
-	          .attr('class', 'debug-imagery debug orange');
-	      })
-	      .catch(function () { /* ignore */ });
+	    _mainFileFetcher.get('imagery').then(function (d) {
+	      var hits = showImagery && d.query.bbox(extent.rectangle(), true) || [];
+	      var features = hits.map(function (d) {
+	        return d.features[d.id];
+	      });
+	      var imagery = layer.selectAll('path.debug-imagery').data(features);
+	      imagery.exit().remove();
+	      imagery.enter().append('path').attr('class', 'debug-imagery debug orange');
+	    })["catch"](function () {
+	      /* ignore */
+	    }); // downloaded
 
-	    // downloaded
 	    var osm = context.connection();
 	    var dataDownloaded = [];
+
 	    if (osm && showDownloaded) {
 	      var rtree = osm.caches('get').tile.rtree;
 	      dataDownloaded = rtree.all().map(function (bbox) {
 	        return {
 	          type: 'Feature',
-	          properties: { id: bbox.id },
+	          properties: {
+	            id: bbox.id
+	          },
 	          geometry: {
 	            type: 'Polygon',
-	            coordinates: [[
-	              [ bbox.minX, bbox.minY ],
-	              [ bbox.minX, bbox.maxY ],
-	              [ bbox.maxX, bbox.maxY ],
-	              [ bbox.maxX, bbox.minY ],
-	              [ bbox.minX, bbox.minY ]
-	            ]]
+	            coordinates: [[[bbox.minX, bbox.minY], [bbox.minX, bbox.maxY], [bbox.maxX, bbox.maxY], [bbox.maxX, bbox.minY], [bbox.minX, bbox.minY]]]
 	          }
 	        };
 	      });
 	    }
 
-	    var downloaded = layer
-	      .selectAll('path.debug-downloaded')
-	      .data(showDownloaded ? dataDownloaded : []);
+	    var downloaded = layer.selectAll('path.debug-downloaded').data(showDownloaded ? dataDownloaded : []);
+	    downloaded.exit().remove();
+	    downloaded.enter().append('path').attr('class', 'debug-downloaded debug purple'); // update
 
-	    downloaded.exit()
-	      .remove();
-
-	    downloaded.enter()
-	      .append('path')
-	      .attr('class', 'debug-downloaded debug purple');
-
-	    // update
-	    layer.selectAll('path')
-	      .attr('d', svgPath(projection).geojson);
-	  }
+	    layer.selectAll('path').attr('d', svgPath(projection).geojson);
+	  } // This looks strange because `enabled` methods on other layers are
+	  // chainable getter/setters, and this one is just a getter.
 
 
-	  // This looks strange because `enabled` methods on other layers are
-	  // chainable getter/setters, and this one is just a getter.
-	  drawDebug.enabled = function() {
+	  drawDebug.enabled = function () {
 	    if (!arguments.length) {
-	      return context.getDebug('tile') ||
-	        context.getDebug('collision') ||
-	        context.getDebug('imagery') ||
-	        context.getDebug('target') ||
-	        context.getDebug('downloaded');
+	      return context.getDebug('tile') || context.getDebug('collision') || context.getDebug('imagery') || context.getDebug('target') || context.getDebug('downloaded');
 	    } else {
-	        return this;
+	      return this;
 	    }
 	  };
 
-
 	  return drawDebug;
 	}
 
-	var _layerEnabled = false;
-	var _qaService;
+	/*
+	    A standalone SVG element that contains only a `defs` sub-element. To be
+	    used once globally, since defs IDs must be unique within a document.
+	*/
+
+	function svgDefs(context) {
+	  var _defsSelection = select(null);
+
+	  var _spritesheetIds = ['iD-sprite', 'maki-sprite', 'temaki-sprite', 'fa-sprite', 'community-sprite'];
+
+	  function drawDefs(selection) {
+	    _defsSelection = selection.append('defs'); // add markers
+
+	    _defsSelection.append('marker').attr('id', 'ideditor-oneway-marker').attr('viewBox', '0 0 10 5').attr('refX', 2.5).attr('refY', 2.5).attr('markerWidth', 2).attr('markerHeight', 2).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'oneway-marker-path').attr('d', 'M 5,3 L 0,3 L 0,2 L 5,2 L 5,0 L 10,2.5 L 5,5 z').attr('stroke', 'none').attr('fill', '#000').attr('opacity', '0.75'); // SVG markers have to be given a colour where they're defined
+	    // (they can't inherit it from the line they're attached to),
+	    // so we need to manually define markers for each color of tag
+	    // (also, it's slightly nicer if we can control the
+	    // positioning for different tags)
+
+
+	    function addSidedMarker(name, color, offset) {
+	      _defsSelection.append('marker').attr('id', 'ideditor-sided-marker-' + name).attr('viewBox', '0 0 2 2').attr('refX', 1).attr('refY', -offset).attr('markerWidth', 1.5).attr('markerHeight', 1.5).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'sided-marker-path sided-marker-' + name + '-path').attr('d', 'M 0,0 L 1,1 L 2,0 z').attr('stroke', 'none').attr('fill', color);
+	    }
+
+	    addSidedMarker('natural', 'rgb(170, 170, 170)', 0); // for a coastline, the arrows are (somewhat unintuitively) on
+	    // the water side, so let's color them blue (with a gap) to
+	    // give a stronger indication
+
+	    addSidedMarker('coastline', '#77dede', 1);
+	    addSidedMarker('waterway', '#77dede', 1); // barriers have a dashed line, and separating the triangle
+	    // from the line visually suits that
+
+	    addSidedMarker('barrier', '#ddd', 1);
+	    addSidedMarker('man_made', '#fff', 0);
+
+	    _defsSelection.append('marker').attr('id', 'ideditor-viewfield-marker').attr('viewBox', '0 0 16 16').attr('refX', 8).attr('refY', 16).attr('markerWidth', 4).attr('markerHeight', 4).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'viewfield-marker-path').attr('d', 'M 6,14 C 8,13.4 8,13.4 10,14 L 16,3 C 12,0 4,0 0,3 z').attr('fill', '#333').attr('fill-opacity', '0.75').attr('stroke', '#fff').attr('stroke-width', '0.5px').attr('stroke-opacity', '0.75');
+
+	    _defsSelection.append('marker').attr('id', 'ideditor-viewfield-marker-wireframe').attr('viewBox', '0 0 16 16').attr('refX', 8).attr('refY', 16).attr('markerWidth', 4).attr('markerHeight', 4).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'viewfield-marker-path').attr('d', 'M 6,14 C 8,13.4 8,13.4 10,14 L 16,3 C 12,0 4,0 0,3 z').attr('fill', 'none').attr('stroke', '#fff').attr('stroke-width', '0.5px').attr('stroke-opacity', '0.75'); // add patterns
+
+
+	    var patterns = _defsSelection.selectAll('pattern').data([// pattern name, pattern image name
+	    ['beach', 'dots'], ['construction', 'construction'], ['cemetery', 'cemetery'], ['cemetery_christian', 'cemetery_christian'], ['cemetery_buddhist', 'cemetery_buddhist'], ['cemetery_muslim', 'cemetery_muslim'], ['cemetery_jewish', 'cemetery_jewish'], ['farmland', 'farmland'], ['farmyard', 'farmyard'], ['forest', 'forest'], ['forest_broadleaved', 'forest_broadleaved'], ['forest_needleleaved', 'forest_needleleaved'], ['forest_leafless', 'forest_leafless'], ['golf_green', 'grass'], ['grass', 'grass'], ['landfill', 'landfill'], ['meadow', 'grass'], ['orchard', 'orchard'], ['pond', 'pond'], ['quarry', 'quarry'], ['scrub', 'bushes'], ['vineyard', 'vineyard'], ['water_standing', 'lines'], ['waves', 'waves'], ['wetland', 'wetland'], ['wetland_marsh', 'wetland_marsh'], ['wetland_swamp', 'wetland_swamp'], ['wetland_bog', 'wetland_bog'], ['wetland_reedbed', 'wetland_reedbed']]).enter().append('pattern').attr('id', function (d) {
+	      return 'ideditor-pattern-' + d[0];
+	    }).attr('width', 32).attr('height', 32).attr('patternUnits', 'userSpaceOnUse');
+
+	    patterns.append('rect').attr('x', 0).attr('y', 0).attr('width', 32).attr('height', 32).attr('class', function (d) {
+	      return 'pattern-color-' + d[0];
+	    });
+	    patterns.append('image').attr('x', 0).attr('y', 0).attr('width', 32).attr('height', 32).attr('xlink:href', function (d) {
+	      return context.imagePath('pattern/' + d[1] + '.png');
+	    }); // add clip paths
+
+	    _defsSelection.selectAll('clipPath').data([12, 18, 20, 32, 45]).enter().append('clipPath').attr('id', function (d) {
+	      return 'ideditor-clip-square-' + d;
+	    }).append('rect').attr('x', 0).attr('y', 0).attr('width', function (d) {
+	      return d;
+	    }).attr('height', function (d) {
+	      return d;
+	    }); // add symbol spritesheets
+
+
+	    addSprites(_spritesheetIds, true);
+	  }
+
+	  function addSprites(ids, overrideColors) {
+	    _spritesheetIds = utilArrayUniq(_spritesheetIds.concat(ids));
+
+	    var spritesheets = _defsSelection.selectAll('.spritesheet').data(_spritesheetIds);
+
+	    spritesheets.enter().append('g').attr('class', function (d) {
+	      return 'spritesheet spritesheet-' + d;
+	    }).each(function (d) {
+	      var url = context.imagePath(d + '.svg');
+	      var node = select(this).node();
+	      svg(url).then(function (svg) {
+	        node.appendChild(select(svg.documentElement).attr('id', 'ideditor-' + d).node());
+
+	        if (overrideColors && d !== 'iD-sprite') {
+	          // allow icon colors to be overridden..
+	          select(node).selectAll('path').attr('fill', 'currentColor');
+	        }
+	      })["catch"](function () {
+	        /* ignore */
+	      });
+	    });
+	    spritesheets.exit().remove();
+	  }
+
+	  drawDefs.addSprites = addSprites;
+	  return drawDefs;
+	}
+
+	var _layerEnabled$2 = false;
+
+	var _qaService$2;
 
 	function svgKeepRight(projection, context, dispatch) {
-	  var throttledRedraw = throttle(function () { return dispatch.call('change'); }, 1000);
-	  var minZoom = 12;
+	  var throttledRedraw = throttle(function () {
+	    return dispatch.call('change');
+	  }, 1000);
 
+	  var minZoom = 12;
 	  var touchLayer = select(null);
 	  var drawLayer = select(null);
 	  var layerVisible = false;
 
 	  function markerPath(selection, klass) {
-	    selection
-	      .attr('class', klass)
-	      .attr('transform', 'translate(-4, -24)')
-	      .attr('d', 'M11.6,6.2H7.1l1.4-5.1C8.6,0.6,8.1,0,7.5,0H2.2C1.7,0,1.3,0.3,1.3,0.8L0,10.2c-0.1,0.6,0.4,1.1,0.9,1.1h4.6l-1.8,7.6C3.6,19.4,4.1,20,4.7,20c0.3,0,0.6-0.2,0.8-0.5l6.9-11.9C12.7,7,12.3,6.2,11.6,6.2z');
-	  }
+	    selection.attr('class', klass).attr('transform', 'translate(-4, -24)').attr('d', 'M11.6,6.2H7.1l1.4-5.1C8.6,0.6,8.1,0,7.5,0H2.2C1.7,0,1.3,0.3,1.3,0.8L0,10.2c-0.1,0.6,0.4,1.1,0.9,1.1h4.6l-1.8,7.6C3.6,19.4,4.1,20,4.7,20c0.3,0,0.6-0.2,0.8-0.5l6.9-11.9C12.7,7,12.3,6.2,11.6,6.2z');
+	  } // Loosely-coupled keepRight service for fetching issues.
+
 
-	  // Loosely-coupled keepRight service for fetching issues.
 	  function getService() {
-	    if (services.keepRight && !_qaService) {
-	      _qaService = services.keepRight;
-	      _qaService.on('loaded', throttledRedraw);
-	    } else if (!services.keepRight && _qaService) {
-	      _qaService = null;
+	    if (services.keepRight && !_qaService$2) {
+	      _qaService$2 = services.keepRight;
+
+	      _qaService$2.on('loaded', throttledRedraw);
+	    } else if (!services.keepRight && _qaService$2) {
+	      _qaService$2 = null;
 	    }
 
-	    return _qaService;
-	  }
+	    return _qaService$2;
+	  } // Show the markers
+
 
-	  // Show the markers
 	  function editOn() {
 	    if (!layerVisible) {
 	      layerVisible = true;
-	      drawLayer
-	        .style('display', 'block');
+	      drawLayer.style('display', 'block');
 	    }
-	  }
+	  } // Immediately remove the markers and their touch targets
+
 
-	  // Immediately remove the markers and their touch targets
 	  function editOff() {
 	    if (layerVisible) {
 	      layerVisible = false;
-	      drawLayer
-	        .style('display', 'none');
-	      drawLayer.selectAll('.qaItem.keepRight')
-	        .remove();
-	      touchLayer.selectAll('.qaItem.keepRight')
-	        .remove();
+	      drawLayer.style('display', 'none');
+	      drawLayer.selectAll('.qaItem.keepRight').remove();
+	      touchLayer.selectAll('.qaItem.keepRight').remove();
 	    }
-	  }
+	  } // Enable the layer.  This shows the markers and transitions them to visible.
+
 
-	  // Enable the layer.  This shows the markers and transitions them to visible.
 	  function layerOn() {
 	    editOn();
+	    drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
+	      return dispatch.call('change');
+	    });
+	  } // Disable the layer.  This transitions the layer invisible and then hides the markers.
 
-	    drawLayer
-	      .style('opacity', 0)
-	      .transition()
-	      .duration(250)
-	      .style('opacity', 1)
-	      .on('end interrupt', function () { return dispatch.call('change'); });
-	  }
 
-	  // Disable the layer.  This transitions the layer invisible and then hides the markers.
 	  function layerOff() {
 	    throttledRedraw.cancel();
 	    drawLayer.interrupt();
-	    touchLayer.selectAll('.qaItem.keepRight')
-	      .remove();
-
-	    drawLayer
-	      .transition()
-	      .duration(250)
-	      .style('opacity', 0)
-	      .on('end interrupt', function () {
-	        editOff();
-	        dispatch.call('change');
-	      });
-	  }
+	    touchLayer.selectAll('.qaItem.keepRight').remove();
+	    drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+	      editOff();
+	      dispatch.call('change');
+	    });
+	  } // Update the issue markers
 
-	  // Update the issue markers
-	  function updateMarkers() {
-	    if (!layerVisible || !_layerEnabled) { return; }
 
+	  function updateMarkers() {
+	    if (!layerVisible || !_layerEnabled$2) return;
 	    var service = getService();
 	    var selectedID = context.selectedErrorID();
-	    var data = (service ? service.getItems(projection) : []);
-	    var getTransform = svgPointTransform(projection);
+	    var data = service ? service.getItems(projection) : [];
+	    var getTransform = svgPointTransform(projection); // Draw markers..
 
-	    // Draw markers..
-	    var markers = drawLayer.selectAll('.qaItem.keepRight')
-	      .data(data, function (d) { return d.id; });
+	    var markers = drawLayer.selectAll('.qaItem.keepRight').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
-	    // exit
-	    markers.exit()
-	      .remove();
-
-	    // enter
-	    var markersEnter = markers.enter()
-	      .append('g')
-	        .attr('class', function (d) { return ("qaItem " + (d.service) + " itemId-" + (d.id) + " itemType-" + (d.parentIssueType)); });
-
-	    markersEnter
-	      .append('ellipse')
-	        .attr('cx', 0.5)
-	        .attr('cy', 1)
-	        .attr('rx', 6.5)
-	        .attr('ry', 3)
-	        .attr('class', 'stroke');
-
-	    markersEnter
-	      .append('path')
-	        .call(markerPath, 'shadow');
-
-	    markersEnter
-	      .append('use')
-	        .attr('class', 'qaItem-fill')
-	        .attr('width', '20px')
-	        .attr('height', '20px')
-	        .attr('x', '-8px')
-	        .attr('y', '-22px')
-	        .attr('xlink:href', '#iD-icon-bolt');
+	    markers.exit().remove(); // enter
 
-	    // update
-	    markers
-	      .merge(markersEnter)
-	      .sort(sortY)
-	        .classed('selected', function (d) { return d.id === selectedID; })
-	        .attr('transform', getTransform);
+	    var markersEnter = markers.enter().append('g').attr('class', function (d) {
+	      return "qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.parentIssueType);
+	    });
+	    markersEnter.append('ellipse').attr('cx', 0.5).attr('cy', 1).attr('rx', 6.5).attr('ry', 3).attr('class', 'stroke');
+	    markersEnter.append('path').call(markerPath, 'shadow');
+	    markersEnter.append('use').attr('class', 'qaItem-fill').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').attr('xlink:href', '#iD-icon-bolt'); // update
 
+	    markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
+	      return d.id === selectedID;
+	    }).attr('transform', getTransform); // Draw targets..
 
-	    // Draw targets..
-	    if (touchLayer.empty()) { return; }
+	    if (touchLayer.empty()) return;
 	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var targets = touchLayer.selectAll('.qaItem.keepRight').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
-	    var targets = touchLayer.selectAll('.qaItem.keepRight')
-	      .data(data, function (d) { return d.id; });
-
-	    // exit
-	    targets.exit()
-	      .remove();
-
-	    // enter/update
-	    targets.enter()
-	      .append('rect')
-	        .attr('width', '20px')
-	        .attr('height', '20px')
-	        .attr('x', '-8px')
-	        .attr('y', '-22px')
-	      .merge(targets)
-	      .sort(sortY)
-	        .attr('class', function (d) { return ("qaItem " + (d.service) + " target " + fillClass + " itemId-" + (d.id)); })
-	        .attr('transform', getTransform);
+	    targets.exit().remove(); // enter/update
 
+	    targets.enter().append('rect').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').merge(targets).sort(sortY).attr('class', function (d) {
+	      return "qaItem ".concat(d.service, " target ").concat(fillClass, " itemId-").concat(d.id);
+	    }).attr('transform', getTransform);
 
 	    function sortY(a, b) {
-	      return (a.id === selectedID) ? 1
-	        : (b.id === selectedID) ? -1
-	        : (a.severity === 'error' && b.severity !== 'error') ? 1
-	        : (b.severity === 'error' && a.severity !== 'error') ? -1
-	        : b.loc[1] - a.loc[1];
+	      return a.id === selectedID ? 1 : b.id === selectedID ? -1 : a.severity === 'error' && b.severity !== 'error' ? 1 : b.severity === 'error' && a.severity !== 'error' ? -1 : b.loc[1] - a.loc[1];
 	    }
-	  }
+	  } // Draw the keepRight layer and schedule loading issues and updating markers.
+
 
-	  // Draw the keepRight layer and schedule loading issues and updating markers.
 	  function drawKeepRight(selection) {
 	    var service = getService();
-
 	    var surface = context.surface();
+
 	    if (surface && !surface.empty()) {
 	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
 	    }
 
-	    drawLayer = selection.selectAll('.layer-keepRight')
-	      .data(service ? [0] : []);
+	    drawLayer = selection.selectAll('.layer-keepRight').data(service ? [0] : []);
+	    drawLayer.exit().remove();
+	    drawLayer = drawLayer.enter().append('g').attr('class', 'layer-keepRight').style('display', _layerEnabled$2 ? 'block' : 'none').merge(drawLayer);
 
-	    drawLayer.exit()
-	      .remove();
-
-	    drawLayer = drawLayer.enter()
-	      .append('g')
-	        .attr('class', 'layer-keepRight')
-	        .style('display', _layerEnabled ? 'block' : 'none')
-	      .merge(drawLayer);
-
-	    if (_layerEnabled) {
+	    if (_layerEnabled$2) {
 	      if (service && ~~context.map().zoom() >= minZoom) {
 	        editOn();
 	        service.loadIssues(projection);
@@ -68521,17 +64772,18 @@
 	        editOff();
 	      }
 	    }
-	  }
+	  } // Toggles the layer on and off
 
-	  // Toggles the layer on and off
-	  drawKeepRight.enabled = function(val) {
-	    if (!arguments.length) { return _layerEnabled; }
 
-	    _layerEnabled = val;
-	    if (_layerEnabled) {
+	  drawKeepRight.enabled = function (val) {
+	    if (!arguments.length) return _layerEnabled$2;
+	    _layerEnabled$2 = val;
+
+	    if (_layerEnabled$2) {
 	      layerOn();
 	    } else {
 	      layerOff();
+
 	      if (context.selectedErrorID()) {
 	        context.enter(modeBrowse(context));
 	      }
@@ -68541,1104 +64793,857 @@
 	    return this;
 	  };
 
-	  drawKeepRight.supported = function () { return !!getService(); };
+	  drawKeepRight.supported = function () {
+	    return !!getService();
+	  };
 
 	  return drawKeepRight;
 	}
 
 	function svgGeolocate(projection) {
-	    var layer = select(null);
-	    var _position;
+	  var layer = select(null);
 
+	  var _position;
 
-	    function init() {
-	        if (svgGeolocate.initialized) { return; }  // run once
-	        svgGeolocate.enabled = false;
-	        svgGeolocate.initialized = true;
-	    }
+	  function init() {
+	    if (svgGeolocate.initialized) return; // run once
 
-	    function showLayer() {
-	        layer.style('display', 'block');
-	    }
+	    svgGeolocate.enabled = false;
+	    svgGeolocate.initialized = true;
+	  }
 
+	  function showLayer() {
+	    layer.style('display', 'block');
+	  }
 
-	    function hideLayer() {
-	        layer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0);
-	    }
+	  function hideLayer() {
+	    layer.transition().duration(250).style('opacity', 0);
+	  }
 
-	    function layerOn() {
-	        layer
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1);
+	  function layerOn() {
+	    layer.style('opacity', 0).transition().duration(250).style('opacity', 1);
+	  }
 
-	    }
+	  function layerOff() {
+	    layer.style('display', 'none');
+	  }
 
-	    function layerOff() {
-	        layer.style('display', 'none');
-	    }
+	  function transform(d) {
+	    return svgPointTransform(projection)(d);
+	  }
 
-	    function transform(d) {
-	        return svgPointTransform(projection)(d);
-	    }
+	  function accuracy(accuracy, loc) {
+	    // converts accuracy to pixels...
+	    var degreesRadius = geoMetersToLat(accuracy),
+	        tangentLoc = [loc[0], loc[1] + degreesRadius],
+	        projectedTangent = projection(tangentLoc),
+	        projectedLoc = projection([loc[0], loc[1]]); // southern most point will have higher pixel value...
 
-	    function accuracy(accuracy, loc) { // converts accuracy to pixels...
-	        var degreesRadius = geoMetersToLat(accuracy),
-	            tangentLoc = [loc[0], loc[1] + degreesRadius],
-	            projectedTangent = projection(tangentLoc),
-	            projectedLoc = projection([loc[0], loc[1]]);
+	    return Math.round(projectedLoc[1] - projectedTangent[1]).toString();
+	  }
 
-	        // southern most point will have higher pixel value...
-	       return Math.round(projectedLoc[1] - projectedTangent[1]).toString();
+	  function update() {
+	    var geolocation = {
+	      loc: [_position.coords.longitude, _position.coords.latitude]
+	    };
+	    var groups = layer.selectAll('.geolocations').selectAll('.geolocation').data([geolocation]);
+	    groups.exit().remove();
+	    var pointsEnter = groups.enter().append('g').attr('class', 'geolocation');
+	    pointsEnter.append('circle').attr('class', 'geolocate-radius').attr('dx', '0').attr('dy', '0').attr('fill', 'rgb(15,128,225)').attr('fill-opacity', '0.3').attr('r', '0');
+	    pointsEnter.append('circle').attr('dx', '0').attr('dy', '0').attr('fill', 'rgb(15,128,225)').attr('stroke', 'white').attr('stroke-width', '1.5').attr('r', '6');
+	    groups.merge(pointsEnter).attr('transform', transform);
+	    layer.select('.geolocate-radius').attr('r', accuracy(_position.coords.accuracy, geolocation.loc));
+	  }
+
+	  function drawLocation(selection) {
+	    var enabled = svgGeolocate.enabled;
+	    layer = selection.selectAll('.layer-geolocate').data([0]);
+	    layer.exit().remove();
+	    var layerEnter = layer.enter().append('g').attr('class', 'layer-geolocate').style('display', enabled ? 'block' : 'none');
+	    layerEnter.append('g').attr('class', 'geolocations');
+	    layer = layerEnter.merge(layer);
+
+	    if (enabled) {
+	      update();
+	    } else {
+	      layerOff();
 	    }
+	  }
 
-	    function update() {
-	        var geolocation = { loc: [_position.coords.longitude, _position.coords.latitude] };
-
-	        var groups = layer.selectAll('.geolocations').selectAll('.geolocation')
-	            .data([geolocation]);
-
-	        groups.exit()
-	            .remove();
-
-	        var pointsEnter = groups.enter()
-	            .append('g')
-	            .attr('class', 'geolocation');
-
-	        pointsEnter
-	            .append('circle')
-	            .attr('class', 'geolocate-radius')
-	            .attr('dx', '0')
-	            .attr('dy', '0')
-	            .attr('fill', 'rgb(15,128,225)')
-	            .attr('fill-opacity', '0.3')
-	            .attr('r', '0');
-
-	        pointsEnter
-	            .append('circle')
-	            .attr('dx', '0')
-	            .attr('dy', '0')
-	            .attr('fill', 'rgb(15,128,225)')
-	            .attr('stroke', 'white')
-	            .attr('stroke-width', '1.5')
-	            .attr('r', '6');
-
-	        groups.merge(pointsEnter)
-	            .attr('transform', transform);
+	  drawLocation.enabled = function (position, enabled) {
+	    if (!arguments.length) return svgGeolocate.enabled;
+	    _position = position;
+	    svgGeolocate.enabled = enabled;
 
-	        layer.select('.geolocate-radius').attr('r', accuracy(_position.coords.accuracy, geolocation.loc));
+	    if (svgGeolocate.enabled) {
+	      showLayer();
+	      layerOn();
+	    } else {
+	      hideLayer();
 	    }
 
-	    function drawLocation(selection) {
-	        var enabled = svgGeolocate.enabled;
+	    return this;
+	  };
 
-	        layer = selection.selectAll('.layer-geolocate')
-	            .data([0]);
+	  init();
+	  return drawLocation;
+	}
 
-	        layer.exit()
-	            .remove();
+	function svgLabels(projection, context) {
+	  var path = d3_geoPath(projection);
+	  var detected = utilDetect();
+	  var baselineHack = detected.ie || detected.browser.toLowerCase() === 'edge' || detected.browser.toLowerCase() === 'firefox' && detected.version >= 70;
 
-	        var layerEnter = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-geolocate')
-	            .style('display', enabled ? 'block' : 'none');
+	  var _rdrawn = new RBush();
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'geolocations');
+	  var _rskipped = new RBush();
 
-	        layer = layerEnter
-	            .merge(layer);
+	  var _textWidthCache = {};
+	  var _entitybboxes = {}; // Listed from highest to lowest priority
 
-	        if (enabled) {
-	            update();
-	        } else {
-	            layerOff();
-	        }
-	    }
+	  var labelStack = [['line', 'aeroway', '*', 12], ['line', 'highway', 'motorway', 12], ['line', 'highway', 'trunk', 12], ['line', 'highway', 'primary', 12], ['line', 'highway', 'secondary', 12], ['line', 'highway', 'tertiary', 12], ['line', 'highway', '*', 12], ['line', 'railway', '*', 12], ['line', 'waterway', '*', 12], ['area', 'aeroway', '*', 12], ['area', 'amenity', '*', 12], ['area', 'building', '*', 12], ['area', 'historic', '*', 12], ['area', 'leisure', '*', 12], ['area', 'man_made', '*', 12], ['area', 'natural', '*', 12], ['area', 'shop', '*', 12], ['area', 'tourism', '*', 12], ['area', 'camp_site', '*', 12], ['point', 'aeroway', '*', 10], ['point', 'amenity', '*', 10], ['point', 'building', '*', 10], ['point', 'historic', '*', 10], ['point', 'leisure', '*', 10], ['point', 'man_made', '*', 10], ['point', 'natural', '*', 10], ['point', 'shop', '*', 10], ['point', 'tourism', '*', 10], ['point', 'camp_site', '*', 10], ['line', 'name', '*', 12], ['area', 'name', '*', 12], ['point', 'name', '*', 10]];
 
-	    drawLocation.enabled = function (position, enabled) {
-	        if (!arguments.length) { return svgGeolocate.enabled; }
-	        _position = position;
-	        svgGeolocate.enabled = enabled;
-	        if (svgGeolocate.enabled) {
-	            showLayer();
-	            layerOn();
-	        } else {
-	            hideLayer();
-	        }
-	        return this;
-	    };
+	  function shouldSkipIcon(preset) {
+	    var noIcons = ['building', 'landuse', 'natural'];
+	    return noIcons.some(function (s) {
+	      return preset.id.indexOf(s) >= 0;
+	    });
+	  }
 
-	    init();
-	    return drawLocation;
-	}
+	  function get(array, prop) {
+	    return function (d, i) {
+	      return array[i][prop];
+	    };
+	  }
 
-	function svgLabels(projection, context) {
-	    var path = d3_geoPath(projection);
-	    var detected = utilDetect();
-	    var baselineHack = (detected.ie ||
-	        detected.browser.toLowerCase() === 'edge' ||
-	        (detected.browser.toLowerCase() === 'firefox' && detected.version >= 70));
-	    var _rdrawn = new RBush();
-	    var _rskipped = new RBush();
-	    var _textWidthCache = {};
-	    var _entitybboxes = {};
-
-	    // Listed from highest to lowest priority
-	    var labelStack = [
-	        ['line', 'aeroway', '*', 12],
-	        ['line', 'highway', 'motorway', 12],
-	        ['line', 'highway', 'trunk', 12],
-	        ['line', 'highway', 'primary', 12],
-	        ['line', 'highway', 'secondary', 12],
-	        ['line', 'highway', 'tertiary', 12],
-	        ['line', 'highway', '*', 12],
-	        ['line', 'railway', '*', 12],
-	        ['line', 'waterway', '*', 12],
-	        ['area', 'aeroway', '*', 12],
-	        ['area', 'amenity', '*', 12],
-	        ['area', 'building', '*', 12],
-	        ['area', 'historic', '*', 12],
-	        ['area', 'leisure', '*', 12],
-	        ['area', 'man_made', '*', 12],
-	        ['area', 'natural', '*', 12],
-	        ['area', 'shop', '*', 12],
-	        ['area', 'tourism', '*', 12],
-	        ['area', 'camp_site', '*', 12],
-	        ['point', 'aeroway', '*', 10],
-	        ['point', 'amenity', '*', 10],
-	        ['point', 'building', '*', 10],
-	        ['point', 'historic', '*', 10],
-	        ['point', 'leisure', '*', 10],
-	        ['point', 'man_made', '*', 10],
-	        ['point', 'natural', '*', 10],
-	        ['point', 'shop', '*', 10],
-	        ['point', 'tourism', '*', 10],
-	        ['point', 'camp_site', '*', 10],
-	        ['line', 'name', '*', 12],
-	        ['area', 'name', '*', 12],
-	        ['point', 'name', '*', 10]
-	    ];
+	  function textWidth(text, size, elem) {
+	    var c = _textWidthCache[size];
+	    if (!c) c = _textWidthCache[size] = {};
 
+	    if (c[text]) {
+	      return c[text];
+	    } else if (elem) {
+	      c[text] = elem.getComputedTextLength();
+	      return c[text];
+	    } else {
+	      var str = encodeURIComponent(text).match(/%[CDEFcdef]/g);
 
-	    function shouldSkipIcon(preset) {
-	        var noIcons = ['building', 'landuse', 'natural'];
-	        return noIcons.some(function(s) {
-	            return preset.id.indexOf(s) >= 0;
-	        });
+	      if (str === null) {
+	        return size / 3 * 2 * text.length;
+	      } else {
+	        return size / 3 * (2 * text.length + str.length);
+	      }
 	    }
+	  }
 
+	  function drawLinePaths(selection, entities, filter, classes, labels) {
+	    var paths = selection.selectAll('path').filter(filter).data(entities, osmEntity.key); // exit
 
-	    function get(array, prop) {
-	        return function(d, i) { return array[i][prop]; };
-	    }
+	    paths.exit().remove(); // enter/update
 
+	    paths.enter().append('path').style('stroke-width', get(labels, 'font-size')).attr('id', function (d) {
+	      return 'ideditor-labelpath-' + d.id;
+	    }).attr('class', classes).merge(paths).attr('d', get(labels, 'lineString'));
+	  }
 
-	    function textWidth(text, size, elem) {
-	        var c = _textWidthCache[size];
-	        if (!c) { c = _textWidthCache[size] = {}; }
+	  function drawLineLabels(selection, entities, filter, classes, labels) {
+	    var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit
 
-	        if (c[text]) {
-	            return c[text];
+	    texts.exit().remove(); // enter
 
-	        } else if (elem) {
-	            c[text] = elem.getComputedTextLength();
-	            return c[text];
+	    texts.enter().append('text').attr('class', function (d, i) {
+	      return classes + ' ' + labels[i].classes + ' ' + d.id;
+	    }).attr('dy', baselineHack ? '0.35em' : null).append('textPath').attr('class', 'textpath'); // update
 
-	        } else {
-	            var str = encodeURIComponent(text).match(/%[CDEFcdef]/g);
-	            if (str === null) {
-	                return size / 3 * 2 * text.length;
-	            } else {
-	                return size / 3 * (2 * text.length + str.length);
-	            }
-	        }
-	    }
+	    selection.selectAll('text.' + classes).selectAll('.textpath').filter(filter).data(entities, osmEntity.key).attr('startOffset', '50%').attr('xlink:href', function (d) {
+	      return '#ideditor-labelpath-' + d.id;
+	    }).text(utilDisplayNameForPath);
+	  }
 
+	  function drawPointLabels(selection, entities, filter, classes, labels) {
+	    var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit
 
-	    function drawLinePaths(selection, entities, filter, classes, labels) {
-	        var paths = selection.selectAll('path')
-	            .filter(filter)
-	            .data(entities, osmEntity.key);
-
-	        // exit
-	        paths.exit()
-	            .remove();
-
-	        // enter/update
-	        paths.enter()
-	            .append('path')
-	            .style('stroke-width', get(labels, 'font-size'))
-	            .attr('id', function(d) { return 'ideditor-labelpath-' + d.id; })
-	            .attr('class', classes)
-	            .merge(paths)
-	            .attr('d', get(labels, 'lineString'));
-	    }
-
-
-	    function drawLineLabels(selection, entities, filter, classes, labels) {
-	        var texts = selection.selectAll('text.' + classes)
-	            .filter(filter)
-	            .data(entities, osmEntity.key);
-
-	        // exit
-	        texts.exit()
-	            .remove();
-
-	        // enter
-	        texts.enter()
-	            .append('text')
-	            .attr('class', function(d, i) { return classes + ' ' + labels[i].classes + ' ' + d.id; })
-	            .attr('dy', baselineHack ? '0.35em' : null)
-	            .append('textPath')
-	            .attr('class', 'textpath');
-
-	        // update
-	        selection.selectAll('text.' + classes).selectAll('.textpath')
-	            .filter(filter)
-	            .data(entities, osmEntity.key)
-	            .attr('startOffset', '50%')
-	            .attr('xlink:href', function(d) { return '#ideditor-labelpath-' + d.id; })
-	            .text(utilDisplayNameForPath);
-	    }
-
-
-	    function drawPointLabels(selection, entities, filter, classes, labels) {
-	        var texts = selection.selectAll('text.' + classes)
-	            .filter(filter)
-	            .data(entities, osmEntity.key);
-
-	        // exit
-	        texts.exit()
-	            .remove();
-
-	        // enter/update
-	        texts.enter()
-	            .append('text')
-	            .attr('class', function(d, i) {
-	                return classes + ' ' + labels[i].classes + ' ' + d.id;
-	            })
-	            .merge(texts)
-	            .attr('x', get(labels, 'x'))
-	            .attr('y', get(labels, 'y'))
-	            .style('text-anchor', get(labels, 'textAnchor'))
-	            .text(utilDisplayName)
-	            .each(function(d, i) {
-	                textWidth(utilDisplayName(d), labels[i].height, this);
-	            });
-	    }
+	    texts.exit().remove(); // enter/update
 
+	    texts.enter().append('text').attr('class', function (d, i) {
+	      return classes + ' ' + labels[i].classes + ' ' + d.id;
+	    }).merge(texts).attr('x', get(labels, 'x')).attr('y', get(labels, 'y')).style('text-anchor', get(labels, 'textAnchor')).text(utilDisplayName).each(function (d, i) {
+	      textWidth(utilDisplayName(d), labels[i].height, this);
+	    });
+	  }
 
-	    function drawAreaLabels(selection, entities, filter, classes, labels) {
-	        entities = entities.filter(hasText);
-	        labels = labels.filter(hasText);
-	        drawPointLabels(selection, entities, filter, classes, labels);
+	  function drawAreaLabels(selection, entities, filter, classes, labels) {
+	    entities = entities.filter(hasText);
+	    labels = labels.filter(hasText);
+	    drawPointLabels(selection, entities, filter, classes, labels);
 
-	        function hasText(d, i) {
-	            return labels[i].hasOwnProperty('x') && labels[i].hasOwnProperty('y');
-	        }
+	    function hasText(d, i) {
+	      return labels[i].hasOwnProperty('x') && labels[i].hasOwnProperty('y');
 	    }
+	  }
 
+	  function drawAreaIcons(selection, entities, filter, classes, labels) {
+	    var icons = selection.selectAll('use.' + classes).filter(filter).data(entities, osmEntity.key); // exit
 
-	    function drawAreaIcons(selection, entities, filter, classes, labels) {
-	        var icons = selection.selectAll('use.' + classes)
-	            .filter(filter)
-	            .data(entities, osmEntity.key);
+	    icons.exit().remove(); // enter/update
 
-	        // exit
-	        icons.exit()
-	            .remove();
+	    icons.enter().append('use').attr('class', 'icon ' + classes).attr('width', '17px').attr('height', '17px').merge(icons).attr('transform', get(labels, 'transform')).attr('xlink:href', function (d) {
+	      var preset = _mainPresetIndex.match(d, context.graph());
+	      var picon = preset && preset.icon;
+
+	      if (!picon) {
+	        return '';
+	      } else {
+	        var isMaki = /^maki-/.test(picon);
+	        return '#' + picon + (isMaki ? '-15' : '');
+	      }
+	    });
+	  }
 
-	        // enter/update
-	        icons.enter()
-	            .append('use')
-	            .attr('class', 'icon ' + classes)
-	            .attr('width', '17px')
-	            .attr('height', '17px')
-	            .merge(icons)
-	            .attr('transform', get(labels, 'transform'))
-	            .attr('xlink:href', function(d) {
-	                var preset = _mainPresetIndex.match(d, context.graph());
-	                var picon = preset && preset.icon;
+	  function drawCollisionBoxes(selection, rtree, which) {
+	    var classes = 'debug ' + which + ' ' + (which === 'debug-skipped' ? 'orange' : 'yellow');
+	    var gj = [];
 
-	                if (!picon) {
-	                    return '';
-	                } else {
-	                    var isMaki = /^maki-/.test(picon);
-	                    return '#' + picon + (isMaki ? '-15' : '');
-	                }
-	            });
+	    if (context.getDebug('collision')) {
+	      gj = rtree.all().map(function (d) {
+	        return {
+	          type: 'Polygon',
+	          coordinates: [[[d.minX, d.minY], [d.maxX, d.minY], [d.maxX, d.maxY], [d.minX, d.maxY], [d.minX, d.minY]]]
+	        };
+	      });
 	    }
 
+	    var boxes = selection.selectAll('.' + which).data(gj); // exit
 
-	    function drawCollisionBoxes(selection, rtree, which) {
-	        var classes = 'debug ' + which + ' ' + (which === 'debug-skipped' ? 'orange' : 'yellow');
+	    boxes.exit().remove(); // enter/update
 
-	        var gj = [];
-	        if (context.getDebug('collision')) {
-	            gj = rtree.all().map(function(d) {
-	                return { type: 'Polygon', coordinates: [[
-	                    [d.minX, d.minY],
-	                    [d.maxX, d.minY],
-	                    [d.maxX, d.maxY],
-	                    [d.minX, d.maxY],
-	                    [d.minX, d.minY]
-	                ]]};
-	            });
-	        }
-
-	        var boxes = selection.selectAll('.' + which)
-	            .data(gj);
+	    boxes.enter().append('path').attr('class', classes).merge(boxes).attr('d', d3_geoPath());
+	  }
 
-	        // exit
-	        boxes.exit()
-	            .remove();
+	  function drawLabels(selection, graph, entities, filter, dimensions, fullRedraw) {
+	    var wireframe = context.surface().classed('fill-wireframe');
+	    var zoom = geoScaleToZoom(projection.scale());
+	    var labelable = [];
+	    var renderNodeAs = {};
+	    var i, j, k, entity, geometry;
 
-	        // enter/update
-	        boxes.enter()
-	            .append('path')
-	            .attr('class', classes)
-	            .merge(boxes)
-	            .attr('d', d3_geoPath());
+	    for (i = 0; i < labelStack.length; i++) {
+	      labelable.push([]);
 	    }
 
+	    if (fullRedraw) {
+	      _rdrawn.clear();
 
-	    function drawLabels(selection, graph, entities, filter, dimensions, fullRedraw) {
-	        var wireframe = context.surface().classed('fill-wireframe');
-	        var zoom = geoScaleToZoom(projection.scale());
+	      _rskipped.clear();
 
-	        var labelable = [];
-	        var renderNodeAs = {};
-	        var i, j, k, entity, geometry;
-
-	        for (i = 0; i < labelStack.length; i++) {
-	            labelable.push([]);
-	        }
+	      _entitybboxes = {};
+	    } else {
+	      for (i = 0; i < entities.length; i++) {
+	        entity = entities[i];
+	        var toRemove = [].concat(_entitybboxes[entity.id] || []).concat(_entitybboxes[entity.id + 'I'] || []);
 
-	        if (fullRedraw) {
-	            _rdrawn.clear();
-	            _rskipped.clear();
-	            _entitybboxes = {};
+	        for (j = 0; j < toRemove.length; j++) {
+	          _rdrawn.remove(toRemove[j]);
 
-	        } else {
-	            for (i = 0; i < entities.length; i++) {
-	                entity = entities[i];
-	                var toRemove = []
-	                    .concat(_entitybboxes[entity.id] || [])
-	                    .concat(_entitybboxes[entity.id + 'I'] || []);
-
-	                for (j = 0; j < toRemove.length; j++) {
-	                    _rdrawn.remove(toRemove[j]);
-	                    _rskipped.remove(toRemove[j]);
-	                }
-	            }
+	          _rskipped.remove(toRemove[j]);
 	        }
+	      }
+	    } // Loop through all the entities to do some preprocessing
 
-	        // Loop through all the entities to do some preprocessing
-	        for (i = 0; i < entities.length; i++) {
-	            entity = entities[i];
-	            geometry = entity.geometry(graph);
-
-	            // Insert collision boxes around interesting points/vertices
-	            if (geometry === 'point' || (geometry === 'vertex' && isInterestingVertex(entity))) {
-	                var hasDirections = entity.directions(graph, projection).length;
-	                var markerPadding;
-
-	                if (!wireframe && geometry === 'point' && !(zoom >= 18 && hasDirections)) {
-	                    renderNodeAs[entity.id] = 'point';
-	                    markerPadding = 20;   // extra y for marker height
-	                } else {
-	                    renderNodeAs[entity.id] = 'vertex';
-	                    markerPadding = 0;
-	                }
-
-	                var coord = projection(entity.loc);
-	                var nodePadding = 10;
-	                var bbox = {
-	                    minX: coord[0] - nodePadding,
-	                    minY: coord[1] - nodePadding - markerPadding,
-	                    maxX: coord[0] + nodePadding,
-	                    maxY: coord[1] + nodePadding
-	                };
-
-	                doInsert(bbox, entity.id + 'P');
-	            }
-
-	            // From here on, treat vertices like points
-	            if (geometry === 'vertex') {
-	                geometry = 'point';
-	            }
-
-	            // Determine which entities are label-able
-	            var preset = geometry === 'area' && _mainPresetIndex.match(entity, graph);
-	            var icon = preset && !shouldSkipIcon(preset) && preset.icon;
 
-	            if (!icon && !utilDisplayName(entity))
-	                { continue; }
+	    for (i = 0; i < entities.length; i++) {
+	      entity = entities[i];
+	      geometry = entity.geometry(graph); // Insert collision boxes around interesting points/vertices
 
-	            for (k = 0; k < labelStack.length; k++) {
-	                var matchGeom = labelStack[k][0];
-	                var matchKey = labelStack[k][1];
-	                var matchVal = labelStack[k][2];
-	                var hasVal = entity.tags[matchKey];
+	      if (geometry === 'point' || geometry === 'vertex' && isInterestingVertex(entity)) {
+	        var hasDirections = entity.directions(graph, projection).length;
+	        var markerPadding;
 
-	                if (geometry === matchGeom && hasVal && (matchVal === '*' || matchVal === hasVal)) {
-	                    labelable[k].push(entity);
-	                    break;
-	                }
-	            }
+	        if (!wireframe && geometry === 'point' && !(zoom >= 18 && hasDirections)) {
+	          renderNodeAs[entity.id] = 'point';
+	          markerPadding = 20; // extra y for marker height
+	        } else {
+	          renderNodeAs[entity.id] = 'vertex';
+	          markerPadding = 0;
 	        }
 
-	        var positions = {
-	            point: [],
-	            line: [],
-	            area: []
+	        var coord = projection(entity.loc);
+	        var nodePadding = 10;
+	        var bbox = {
+	          minX: coord[0] - nodePadding,
+	          minY: coord[1] - nodePadding - markerPadding,
+	          maxX: coord[0] + nodePadding,
+	          maxY: coord[1] + nodePadding
 	        };
+	        doInsert(bbox, entity.id + 'P');
+	      } // From here on, treat vertices like points
 
-	        var labelled = {
-	            point: [],
-	            line: [],
-	            area: []
-	        };
 
-	        // Try and find a valid label for labellable entities
-	        for (k = 0; k < labelable.length; k++) {
-	            var fontSize = labelStack[k][3];
+	      if (geometry === 'vertex') {
+	        geometry = 'point';
+	      } // Determine which entities are label-able
+
 
-	            for (i = 0; i < labelable[k].length; i++) {
-	                entity = labelable[k][i];
-	                geometry = entity.geometry(graph);
+	      var preset = geometry === 'area' && _mainPresetIndex.match(entity, graph);
+	      var icon = preset && !shouldSkipIcon(preset) && preset.icon;
+	      if (!icon && !utilDisplayName(entity)) continue;
 
-	                var getName = (geometry === 'line') ? utilDisplayNameForPath : utilDisplayName;
-	                var name = getName(entity);
-	                var width = name && textWidth(name, fontSize);
-	                var p = null;
+	      for (k = 0; k < labelStack.length; k++) {
+	        var matchGeom = labelStack[k][0];
+	        var matchKey = labelStack[k][1];
+	        var matchVal = labelStack[k][2];
+	        var hasVal = entity.tags[matchKey];
 
-	                if (geometry === 'point' || geometry === 'vertex') {
-	                    // no point or vertex labels in wireframe mode
-	                    // no vertex labels at low zooms (vertices have no icons)
-	                    if (wireframe) { continue; }
-	                    var renderAs = renderNodeAs[entity.id];
-	                    if (renderAs === 'vertex' && zoom < 17) { continue; }
+	        if (geometry === matchGeom && hasVal && (matchVal === '*' || matchVal === hasVal)) {
+	          labelable[k].push(entity);
+	          break;
+	        }
+	      }
+	    }
 
-	                    p = getPointLabel(entity, width, fontSize, renderAs);
+	    var positions = {
+	      point: [],
+	      line: [],
+	      area: []
+	    };
+	    var labelled = {
+	      point: [],
+	      line: [],
+	      area: []
+	    }; // Try and find a valid label for labellable entities
 
-	                } else if (geometry === 'line') {
-	                    p = getLineLabel(entity, width, fontSize);
+	    for (k = 0; k < labelable.length; k++) {
+	      var fontSize = labelStack[k][3];
 
-	                } else if (geometry === 'area') {
-	                    p = getAreaLabel(entity, width, fontSize);
-	                }
+	      for (i = 0; i < labelable[k].length; i++) {
+	        entity = labelable[k][i];
+	        geometry = entity.geometry(graph);
+	        var getName = geometry === 'line' ? utilDisplayNameForPath : utilDisplayName;
+	        var name = getName(entity);
+	        var width = name && textWidth(name, fontSize);
+	        var p = null;
 
-	                if (p) {
-	                    if (geometry === 'vertex') { geometry = 'point'; }  // treat vertex like point
-	                    p.classes = geometry + ' tag-' + labelStack[k][1];
-	                    positions[geometry].push(p);
-	                    labelled[geometry].push(entity);
-	                }
-	            }
+	        if (geometry === 'point' || geometry === 'vertex') {
+	          // no point or vertex labels in wireframe mode
+	          // no vertex labels at low zooms (vertices have no icons)
+	          if (wireframe) continue;
+	          var renderAs = renderNodeAs[entity.id];
+	          if (renderAs === 'vertex' && zoom < 17) continue;
+	          p = getPointLabel(entity, width, fontSize, renderAs);
+	        } else if (geometry === 'line') {
+	          p = getLineLabel(entity, width, fontSize);
+	        } else if (geometry === 'area') {
+	          p = getAreaLabel(entity, width, fontSize);
 	        }
 
+	        if (p) {
+	          if (geometry === 'vertex') {
+	            geometry = 'point';
+	          } // treat vertex like point
 
-	        function isInterestingVertex(entity) {
-	            var selectedIDs = context.selectedIDs();
 
-	            return entity.hasInterestingTags() ||
-	                entity.isEndpoint(graph) ||
-	                entity.isConnected(graph) ||
-	                selectedIDs.indexOf(entity.id) !== -1 ||
-	                graph.parentWays(entity).some(function(parent) {
-	                    return selectedIDs.indexOf(parent.id) !== -1;
-	                });
+	          p.classes = geometry + ' tag-' + labelStack[k][1];
+	          positions[geometry].push(p);
+	          labelled[geometry].push(entity);
 	        }
+	      }
+	    }
 
+	    function isInterestingVertex(entity) {
+	      var selectedIDs = context.selectedIDs();
+	      return entity.hasInterestingTags() || entity.isEndpoint(graph) || entity.isConnected(graph) || selectedIDs.indexOf(entity.id) !== -1 || graph.parentWays(entity).some(function (parent) {
+	        return selectedIDs.indexOf(parent.id) !== -1;
+	      });
+	    }
 
-	        function getPointLabel(entity, width, height, geometry) {
-	            var y = (geometry === 'point' ? -12 : 0);
-	            var pointOffsets = {
-	                ltr: [15, y, 'start'],
-	                rtl: [-15, y, 'end']
-	            };
+	    function getPointLabel(entity, width, height, geometry) {
+	      var y = geometry === 'point' ? -12 : 0;
+	      var pointOffsets = {
+	        ltr: [15, y, 'start'],
+	        rtl: [-15, y, 'end']
+	      };
+	      var textDirection = _mainLocalizer.textDirection();
+	      var coord = projection(entity.loc);
+	      var textPadding = 2;
+	      var offset = pointOffsets[textDirection];
+	      var p = {
+	        height: height,
+	        width: width,
+	        x: coord[0] + offset[0],
+	        y: coord[1] + offset[1],
+	        textAnchor: offset[2]
+	      }; // insert a collision box for the text label..
+
+	      var bbox;
+
+	      if (textDirection === 'rtl') {
+	        bbox = {
+	          minX: p.x - width - textPadding,
+	          minY: p.y - height / 2 - textPadding,
+	          maxX: p.x + textPadding,
+	          maxY: p.y + height / 2 + textPadding
+	        };
+	      } else {
+	        bbox = {
+	          minX: p.x - textPadding,
+	          minY: p.y - height / 2 - textPadding,
+	          maxX: p.x + width + textPadding,
+	          maxY: p.y + height / 2 + textPadding
+	        };
+	      }
 
-	            var textDirection = _mainLocalizer.textDirection();
+	      if (tryInsert([bbox], entity.id, true)) {
+	        return p;
+	      }
+	    }
 
-	            var coord = projection(entity.loc);
-	            var textPadding = 2;
-	            var offset = pointOffsets[textDirection];
-	            var p = {
-	                height: height,
-	                width: width,
-	                x: coord[0] + offset[0],
-	                y: coord[1] + offset[1],
-	                textAnchor: offset[2]
-	            };
+	    function getLineLabel(entity, width, height) {
+	      var viewport = geoExtent(context.projection.clipExtent()).polygon();
+	      var points = graph.childNodes(entity).map(function (node) {
+	        return projection(node.loc);
+	      });
+	      var length = geoPathLength(points);
+	      if (length < width + 20) return; // % along the line to attempt to place the label
 
-	            // insert a collision box for the text label..
-	            var bbox;
-	            if (textDirection === 'rtl') {
-	                bbox = {
-	                    minX: p.x - width - textPadding,
-	                    minY: p.y - (height / 2) - textPadding,
-	                    maxX: p.x + textPadding,
-	                    maxY: p.y + (height / 2) + textPadding
-	                };
-	            } else {
-	                bbox = {
-	                    minX: p.x - textPadding,
-	                    minY: p.y - (height / 2) - textPadding,
-	                    maxX: p.x + width + textPadding,
-	                    maxY: p.y + (height / 2) + textPadding
-	                };
-	            }
+	      var lineOffsets = [50, 45, 55, 40, 60, 35, 65, 30, 70, 25, 75, 20, 80, 15, 95, 10, 90, 5, 95];
+	      var padding = 3;
 
-	            if (tryInsert([bbox], entity.id, true)) {
-	                return p;
-	            }
+	      for (var i = 0; i < lineOffsets.length; i++) {
+	        var offset = lineOffsets[i];
+	        var middle = offset / 100 * length;
+	        var start = middle - width / 2;
+	        if (start < 0 || start + width > length) continue; // generate subpath and ignore paths that are invalid or don't cross viewport.
+
+	        var sub = subpath(points, start, start + width);
+
+	        if (!sub || !geoPolygonIntersectsPolygon(viewport, sub, true)) {
+	          continue;
 	        }
 
+	        var isReverse = reverse(sub);
 
-	        function getLineLabel(entity, width, height) {
-	            var viewport = geoExtent(context.projection.clipExtent()).polygon();
-	            var points = graph.childNodes(entity)
-	                .map(function(node) { return projection(node.loc); });
-	            var length = geoPathLength(points);
+	        if (isReverse) {
+	          sub = sub.reverse();
+	        }
 
-	            if (length < width + 20) { return; }
+	        var bboxes = [];
+	        var boxsize = (height + 2) / 2;
 
-	            // % along the line to attempt to place the label
-	            var lineOffsets = [50, 45, 55, 40, 60, 35, 65, 30, 70,
-	                               25, 75, 20, 80, 15, 95, 10, 90, 5, 95];
-	            var padding = 3;
+	        for (var j = 0; j < sub.length - 1; j++) {
+	          var a = sub[j];
+	          var b = sub[j + 1]; // split up the text into small collision boxes
 
-	            for (var i = 0; i < lineOffsets.length; i++) {
-	                var offset = lineOffsets[i];
-	                var middle = offset / 100 * length;
-	                var start = middle - width / 2;
+	          var num = Math.max(1, Math.floor(geoVecLength(a, b) / boxsize / 2));
 
-	                if (start < 0 || start + width > length) { continue; }
+	          for (var box = 0; box < num; box++) {
+	            var p = geoVecInterp(a, b, box / num);
+	            var x0 = p[0] - boxsize - padding;
+	            var y0 = p[1] - boxsize - padding;
+	            var x1 = p[0] + boxsize + padding;
+	            var y1 = p[1] + boxsize + padding;
+	            bboxes.push({
+	              minX: Math.min(x0, x1),
+	              minY: Math.min(y0, y1),
+	              maxX: Math.max(x0, x1),
+	              maxY: Math.max(y0, y1)
+	            });
+	          }
+	        }
 
-	                // generate subpath and ignore paths that are invalid or don't cross viewport.
-	                var sub = subpath(points, start, start + width);
-	                if (!sub || !geoPolygonIntersectsPolygon(viewport, sub, true)) {
-	                    continue;
-	                }
+	        if (tryInsert(bboxes, entity.id, false)) {
+	          // accept this one
+	          return {
+	            'font-size': height + 2,
+	            lineString: lineString(sub),
+	            startOffset: offset + '%'
+	          };
+	        }
+	      }
 
-	                var isReverse = reverse(sub);
-	                if (isReverse) {
-	                    sub = sub.reverse();
-	                }
+	      function reverse(p) {
+	        var angle = Math.atan2(p[1][1] - p[0][1], p[1][0] - p[0][0]);
+	        return !(p[0][0] < p[p.length - 1][0] && angle < Math.PI / 2 && angle > -Math.PI / 2);
+	      }
 
-	                var bboxes = [];
-	                var boxsize = (height + 2) / 2;
-
-	                for (var j = 0; j < sub.length - 1; j++) {
-	                    var a = sub[j];
-	                    var b = sub[j + 1];
-
-	                    // split up the text into small collision boxes
-	                    var num = Math.max(1, Math.floor(geoVecLength(a, b) / boxsize / 2));
-
-	                    for (var box = 0; box < num; box++) {
-	                        var p = geoVecInterp(a, b, box / num);
-	                        var x0 = p[0] - boxsize - padding;
-	                        var y0 = p[1] - boxsize - padding;
-	                        var x1 = p[0] + boxsize + padding;
-	                        var y1 = p[1] + boxsize + padding;
-
-	                        bboxes.push({
-	                            minX: Math.min(x0, x1),
-	                            minY: Math.min(y0, y1),
-	                            maxX: Math.max(x0, x1),
-	                            maxY: Math.max(y0, y1)
-	                        });
-	                    }
-	                }
+	      function lineString(points) {
+	        return 'M' + points.join('L');
+	      }
 
-	                if (tryInsert(bboxes, entity.id, false)) {   // accept this one
-	                    return {
-	                        'font-size': height + 2,
-	                        lineString: lineString(sub),
-	                        startOffset: offset + '%'
-	                    };
-	                }
-	            }
+	      function subpath(points, from, to) {
+	        var sofar = 0;
+	        var start, end, i0, i1;
 
-	            function reverse(p) {
-	                var angle = Math.atan2(p[1][1] - p[0][1], p[1][0] - p[0][0]);
-	                return !(p[0][0] < p[p.length - 1][0] && angle < Math.PI/2 && angle > -Math.PI/2);
-	            }
+	        for (var i = 0; i < points.length - 1; i++) {
+	          var a = points[i];
+	          var b = points[i + 1];
+	          var current = geoVecLength(a, b);
+	          var portion;
 
-	            function lineString(points) {
-	                return 'M' + points.join('L');
-	            }
+	          if (!start && sofar + current >= from) {
+	            portion = (from - sofar) / current;
+	            start = [a[0] + portion * (b[0] - a[0]), a[1] + portion * (b[1] - a[1])];
+	            i0 = i + 1;
+	          }
 
-	            function subpath(points, from, to) {
-	                var sofar = 0;
-	                var start, end, i0, i1;
-
-	                for (var i = 0; i < points.length - 1; i++) {
-	                    var a = points[i];
-	                    var b = points[i + 1];
-	                    var current = geoVecLength(a, b);
-	                    var portion;
-	                    if (!start && sofar + current >= from) {
-	                        portion = (from - sofar) / current;
-	                        start = [
-	                            a[0] + portion * (b[0] - a[0]),
-	                            a[1] + portion * (b[1] - a[1])
-	                        ];
-	                        i0 = i + 1;
-	                    }
-	                    if (!end && sofar + current >= to) {
-	                        portion = (to - sofar) / current;
-	                        end = [
-	                            a[0] + portion * (b[0] - a[0]),
-	                            a[1] + portion * (b[1] - a[1])
-	                        ];
-	                        i1 = i + 1;
-	                    }
-	                    sofar += current;
-	                }
+	          if (!end && sofar + current >= to) {
+	            portion = (to - sofar) / current;
+	            end = [a[0] + portion * (b[0] - a[0]), a[1] + portion * (b[1] - a[1])];
+	            i1 = i + 1;
+	          }
 
-	                var result = points.slice(i0, i1);
-	                result.unshift(start);
-	                result.push(end);
-	                return result;
-	            }
+	          sofar += current;
 	        }
 
+	        var result = points.slice(i0, i1);
+	        result.unshift(start);
+	        result.push(end);
+	        return result;
+	      }
+	    }
 
-	        function getAreaLabel(entity, width, height) {
-	            var centroid = path.centroid(entity.asGeoJSON(graph, true));
-	            var extent = entity.extent(graph);
-	            var areaWidth = projection(extent[1])[0] - projection(extent[0])[0];
+	    function getAreaLabel(entity, width, height) {
+	      var centroid = path.centroid(entity.asGeoJSON(graph));
+	      var extent = entity.extent(graph);
+	      var areaWidth = projection(extent[1])[0] - projection(extent[0])[0];
+	      if (isNaN(centroid[0]) || areaWidth < 20) return;
+	      var preset = _mainPresetIndex.match(entity, context.graph());
+	      var picon = preset && preset.icon;
+	      var iconSize = 17;
+	      var padding = 2;
+	      var p = {};
 
-	            if (isNaN(centroid[0]) || areaWidth < 20) { return; }
+	      if (picon) {
+	        // icon and label..
+	        if (addIcon()) {
+	          addLabel(iconSize + padding);
+	          return p;
+	        }
+	      } else {
+	        // label only..
+	        if (addLabel(0)) {
+	          return p;
+	        }
+	      }
 
-	            var preset = _mainPresetIndex.match(entity, context.graph());
-	            var picon = preset && preset.icon;
-	            var iconSize = 17;
-	            var padding = 2;
-	            var p = {};
-
-	            if (picon) {  // icon and label..
-	                if (addIcon()) {
-	                    addLabel(iconSize + padding);
-	                    return p;
-	                }
-	            } else {   // label only..
-	                if (addLabel(0)) {
-	                    return p;
-	                }
-	            }
+	      function addIcon() {
+	        var iconX = centroid[0] - iconSize / 2;
+	        var iconY = centroid[1] - iconSize / 2;
+	        var bbox = {
+	          minX: iconX,
+	          minY: iconY,
+	          maxX: iconX + iconSize,
+	          maxY: iconY + iconSize
+	        };
 
+	        if (tryInsert([bbox], entity.id + 'I', true)) {
+	          p.transform = 'translate(' + iconX + ',' + iconY + ')';
+	          return true;
+	        }
 
-	            function addIcon() {
-	                var iconX = centroid[0] - (iconSize / 2);
-	                var iconY = centroid[1] - (iconSize / 2);
-	                var bbox = {
-	                    minX: iconX,
-	                    minY: iconY,
-	                    maxX: iconX + iconSize,
-	                    maxY: iconY + iconSize
-	                };
+	        return false;
+	      }
 
-	                if (tryInsert([bbox], entity.id + 'I', true)) {
-	                    p.transform = 'translate(' + iconX + ',' + iconY + ')';
-	                    return true;
-	                }
-	                return false;
-	            }
+	      function addLabel(yOffset) {
+	        if (width && areaWidth >= width + 20) {
+	          var labelX = centroid[0];
+	          var labelY = centroid[1] + yOffset;
+	          var bbox = {
+	            minX: labelX - width / 2 - padding,
+	            minY: labelY - height / 2 - padding,
+	            maxX: labelX + width / 2 + padding,
+	            maxY: labelY + height / 2 + padding
+	          };
 
-	            function addLabel(yOffset) {
-	                if (width && areaWidth >= width + 20) {
-	                    var labelX = centroid[0];
-	                    var labelY = centroid[1] + yOffset;
-	                    var bbox = {
-	                        minX: labelX - (width / 2) - padding,
-	                        minY: labelY - (height / 2) - padding,
-	                        maxX: labelX + (width / 2) + padding,
-	                        maxY: labelY + (height / 2) + padding
-	                    };
-
-	                    if (tryInsert([bbox], entity.id, true)) {
-	                        p.x = labelX;
-	                        p.y = labelY;
-	                        p.textAnchor = 'middle';
-	                        p.height = height;
-	                        return true;
-	                    }
-	                }
-	                return false;
-	            }
+	          if (tryInsert([bbox], entity.id, true)) {
+	            p.x = labelX;
+	            p.y = labelY;
+	            p.textAnchor = 'middle';
+	            p.height = height;
+	            return true;
+	          }
 	        }
 
+	        return false;
+	      }
+	    } // force insert a singular bounding box
+	    // singular box only, no array, id better be unique
 
-	        // force insert a singular bounding box
-	        // singular box only, no array, id better be unique
-	        function doInsert(bbox, id) {
-	            bbox.id = id;
-
-	            var oldbox = _entitybboxes[id];
-	            if (oldbox) {
-	                _rdrawn.remove(oldbox);
-	            }
-	            _entitybboxes[id] = bbox;
-	            _rdrawn.insert(bbox);
-	        }
 
+	    function doInsert(bbox, id) {
+	      bbox.id = id;
+	      var oldbox = _entitybboxes[id];
 
-	        function tryInsert(bboxes, id, saveSkipped) {
-	            var skipped = false;
+	      if (oldbox) {
+	        _rdrawn.remove(oldbox);
+	      }
 
-	            for (var i = 0; i < bboxes.length; i++) {
-	                var bbox = bboxes[i];
-	                bbox.id = id;
+	      _entitybboxes[id] = bbox;
 
-	                // Check that label is visible
-	                if (bbox.minX < 0 || bbox.minY < 0 || bbox.maxX > dimensions[0] || bbox.maxY > dimensions[1]) {
-	                    skipped = true;
-	                    break;
-	                }
-	                if (_rdrawn.collides(bbox)) {
-	                    skipped = true;
-	                    break;
-	                }
-	            }
+	      _rdrawn.insert(bbox);
+	    }
 
-	            _entitybboxes[id] = bboxes;
+	    function tryInsert(bboxes, id, saveSkipped) {
+	      var skipped = false;
 
-	            if (skipped) {
-	                if (saveSkipped) {
-	                    _rskipped.load(bboxes);
-	                }
-	            } else {
-	                _rdrawn.load(bboxes);
-	            }
+	      for (var i = 0; i < bboxes.length; i++) {
+	        var bbox = bboxes[i];
+	        bbox.id = id; // Check that label is visible
 
-	            return !skipped;
+	        if (bbox.minX < 0 || bbox.minY < 0 || bbox.maxX > dimensions[0] || bbox.maxY > dimensions[1]) {
+	          skipped = true;
+	          break;
 	        }
 
+	        if (_rdrawn.collides(bbox)) {
+	          skipped = true;
+	          break;
+	        }
+	      }
 
-	        var layer = selection.selectAll('.layer-osm.labels');
-	        layer.selectAll('.labels-group')
-	            .data(['halo', 'label', 'debug'])
-	            .enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'labels-group ' + d; });
+	      _entitybboxes[id] = bboxes;
 
-	        var halo = layer.selectAll('.labels-group.halo');
-	        var label = layer.selectAll('.labels-group.label');
-	        var debug = layer.selectAll('.labels-group.debug');
+	      if (skipped) {
+	        if (saveSkipped) {
+	          _rskipped.load(bboxes);
+	        }
+	      } else {
+	        _rdrawn.load(bboxes);
+	      }
 
-	        // points
-	        drawPointLabels(label, labelled.point, filter, 'pointlabel', positions.point);
-	        drawPointLabels(halo, labelled.point, filter, 'pointlabel-halo', positions.point);
+	      return !skipped;
+	    }
 
-	        // lines
-	        drawLinePaths(layer, labelled.line, filter, '', positions.line);
-	        drawLineLabels(label, labelled.line, filter, 'linelabel', positions.line);
-	        drawLineLabels(halo, labelled.line, filter, 'linelabel-halo', positions.line);
+	    var layer = selection.selectAll('.layer-osm.labels');
+	    layer.selectAll('.labels-group').data(['halo', 'label', 'debug']).enter().append('g').attr('class', function (d) {
+	      return 'labels-group ' + d;
+	    });
+	    var halo = layer.selectAll('.labels-group.halo');
+	    var label = layer.selectAll('.labels-group.label');
+	    var debug = layer.selectAll('.labels-group.debug'); // points
 
-	        // areas
-	        drawAreaLabels(label, labelled.area, filter, 'arealabel', positions.area);
-	        drawAreaLabels(halo, labelled.area, filter, 'arealabel-halo', positions.area);
-	        drawAreaIcons(label, labelled.area, filter, 'areaicon', positions.area);
-	        drawAreaIcons(halo, labelled.area, filter, 'areaicon-halo', positions.area);
+	    drawPointLabels(label, labelled.point, filter, 'pointlabel', positions.point);
+	    drawPointLabels(halo, labelled.point, filter, 'pointlabel-halo', positions.point); // lines
 
-	        // debug
-	        drawCollisionBoxes(debug, _rskipped, 'debug-skipped');
-	        drawCollisionBoxes(debug, _rdrawn, 'debug-drawn');
+	    drawLinePaths(layer, labelled.line, filter, '', positions.line);
+	    drawLineLabels(label, labelled.line, filter, 'linelabel', positions.line);
+	    drawLineLabels(halo, labelled.line, filter, 'linelabel-halo', positions.line); // areas
 
-	        layer.call(filterLabels);
-	    }
+	    drawAreaLabels(label, labelled.area, filter, 'arealabel', positions.area);
+	    drawAreaLabels(halo, labelled.area, filter, 'arealabel-halo', positions.area);
+	    drawAreaIcons(label, labelled.area, filter, 'areaicon', positions.area);
+	    drawAreaIcons(halo, labelled.area, filter, 'areaicon-halo', positions.area); // debug
 
+	    drawCollisionBoxes(debug, _rskipped, 'debug-skipped');
+	    drawCollisionBoxes(debug, _rdrawn, 'debug-drawn');
+	    layer.call(filterLabels);
+	  }
 
-	    function filterLabels(selection) {
-	        var drawLayer = selection.selectAll('.layer-osm.labels');
-	        var layers = drawLayer.selectAll('.labels-group.halo, .labels-group.label');
+	  function filterLabels(selection) {
+	    var drawLayer = selection.selectAll('.layer-osm.labels');
+	    var layers = drawLayer.selectAll('.labels-group.halo, .labels-group.label');
+	    layers.selectAll('.nolabel').classed('nolabel', false);
+	    var mouse = context.map().mouse();
+	    var graph = context.graph();
+	    var selectedIDs = context.selectedIDs();
+	    var ids = [];
+	    var pad, bbox; // hide labels near the mouse
+
+	    if (mouse) {
+	      pad = 20;
+	      bbox = {
+	        minX: mouse[0] - pad,
+	        minY: mouse[1] - pad,
+	        maxX: mouse[0] + pad,
+	        maxY: mouse[1] + pad
+	      };
 
-	        layers.selectAll('.nolabel')
-	            .classed('nolabel', false);
+	      var nearMouse = _rdrawn.search(bbox).map(function (entity) {
+	        return entity.id;
+	      });
 
-	        var mouse = context.map().mouse();
-	        var graph = context.graph();
-	        var selectedIDs = context.selectedIDs();
-	        var ids = [];
-	        var pad, bbox;
-
-	        // hide labels near the mouse
-	        if (mouse) {
-	            pad = 20;
-	            bbox = { minX: mouse[0] - pad, minY: mouse[1] - pad, maxX: mouse[0] + pad, maxY: mouse[1] + pad };
-	            var nearMouse = _rdrawn.search(bbox).map(function(entity) { return entity.id; });
-	            ids.push.apply(ids, nearMouse);
-	        }
-
-	        // hide labels on selected nodes (they look weird when dragging / haloed)
-	        for (var i = 0; i < selectedIDs.length; i++) {
-	            var entity = graph.hasEntity(selectedIDs[i]);
-	            if (entity && entity.type === 'node') {
-	                ids.push(selectedIDs[i]);
-	            }
-	        }
+	      ids.push.apply(ids, nearMouse);
+	    } // hide labels on selected nodes (they look weird when dragging / haloed)
 
-	        layers.selectAll(utilEntitySelector(ids))
-	            .classed('nolabel', true);
 
+	    for (var i = 0; i < selectedIDs.length; i++) {
+	      var entity = graph.hasEntity(selectedIDs[i]);
 
-	        // draw the mouse bbox if debugging is on..
-	        var debug = selection.selectAll('.labels-group.debug');
-	        var gj = [];
-	        if (context.getDebug('collision')) {
-	            gj = bbox ? [{
-	                type: 'Polygon',
-	                coordinates: [[
-	                    [bbox.minX, bbox.minY],
-	                    [bbox.maxX, bbox.minY],
-	                    [bbox.maxX, bbox.maxY],
-	                    [bbox.minX, bbox.maxY],
-	                    [bbox.minX, bbox.minY]
-	                ]]
-	            }] : [];
-	        }
+	      if (entity && entity.type === 'node') {
+	        ids.push(selectedIDs[i]);
+	      }
+	    }
 
-	        var box = debug.selectAll('.debug-mouse')
-	            .data(gj);
+	    layers.selectAll(utilEntitySelector(ids)).classed('nolabel', true); // draw the mouse bbox if debugging is on..
 
-	        // exit
-	        box.exit()
-	            .remove();
+	    var debug = selection.selectAll('.labels-group.debug');
+	    var gj = [];
 
-	        // enter/update
-	        box.enter()
-	            .append('path')
-	            .attr('class', 'debug debug-mouse yellow')
-	            .merge(box)
-	            .attr('d', d3_geoPath());
+	    if (context.getDebug('collision')) {
+	      gj = bbox ? [{
+	        type: 'Polygon',
+	        coordinates: [[[bbox.minX, bbox.minY], [bbox.maxX, bbox.minY], [bbox.maxX, bbox.maxY], [bbox.minX, bbox.maxY], [bbox.minX, bbox.minY]]]
+	      }] : [];
 	    }
 
+	    var box = debug.selectAll('.debug-mouse').data(gj); // exit
 
-	    var throttleFilterLabels = throttle(filterLabels, 100);
+	    box.exit().remove(); // enter/update
 
+	    box.enter().append('path').attr('class', 'debug debug-mouse yellow').merge(box).attr('d', d3_geoPath());
+	  }
 
-	    drawLabels.observe = function(selection) {
-	        var listener = function() { throttleFilterLabels(selection); };
-	        selection.on('mousemove.hidelabels', listener);
-	        context.on('enter.hidelabels', listener);
-	    };
-
+	  var throttleFilterLabels = throttle(filterLabels, 100);
 
-	    drawLabels.off = function(selection) {
-	        throttleFilterLabels.cancel();
-	        selection.on('mousemove.hidelabels', null);
-	        context.on('enter.hidelabels', null);
+	  drawLabels.observe = function (selection) {
+	    var listener = function listener() {
+	      throttleFilterLabels(selection);
 	    };
 
+	    selection.on('mousemove.hidelabels', listener);
+	    context.on('enter.hidelabels', listener);
+	  };
+
+	  drawLabels.off = function (selection) {
+	    throttleFilterLabels.cancel();
+	    selection.on('mousemove.hidelabels', null);
+	    context.on('enter.hidelabels', null);
+	  };
 
-	    return drawLabels;
+	  return drawLabels;
 	}
 
 	var _layerEnabled$1 = false;
+
 	var _qaService$1;
 
 	function svgImproveOSM(projection, context, dispatch) {
-	  var throttledRedraw = throttle(function () { return dispatch.call('change'); }, 1000);
-	  var minZoom = 12;
+	  var throttledRedraw = throttle(function () {
+	    return dispatch.call('change');
+	  }, 1000);
 
+	  var minZoom = 12;
 	  var touchLayer = select(null);
 	  var drawLayer = select(null);
 	  var layerVisible = false;
 
 	  function markerPath(selection, klass) {
-	    selection
-	      .attr('class', klass)
-	      .attr('transform', 'translate(-10, -28)')
-	      .attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
-	  }
+	    selection.attr('class', klass).attr('transform', 'translate(-10, -28)').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
+	  } // Loosely-coupled improveOSM service for fetching issues
+
 
-	  // Loosely-coupled improveOSM service for fetching issues
 	  function getService() {
 	    if (services.improveOSM && !_qaService$1) {
 	      _qaService$1 = services.improveOSM;
+
 	      _qaService$1.on('loaded', throttledRedraw);
 	    } else if (!services.improveOSM && _qaService$1) {
 	      _qaService$1 = null;
 	    }
 
 	    return _qaService$1;
-	  }
+	  } // Show the markers
+
 
-	  // Show the markers
 	  function editOn() {
 	    if (!layerVisible) {
 	      layerVisible = true;
-	      drawLayer
-	        .style('display', 'block');
+	      drawLayer.style('display', 'block');
 	    }
-	  }
+	  } // Immediately remove the markers and their touch targets
+
 
-	  // Immediately remove the markers and their touch targets
 	  function editOff() {
 	    if (layerVisible) {
 	      layerVisible = false;
-	      drawLayer
-	        .style('display', 'none');
-	      drawLayer.selectAll('.qaItem.improveOSM')
-	        .remove();
-	      touchLayer.selectAll('.qaItem.improveOSM')
-	        .remove();
+	      drawLayer.style('display', 'none');
+	      drawLayer.selectAll('.qaItem.improveOSM').remove();
+	      touchLayer.selectAll('.qaItem.improveOSM').remove();
 	    }
-	  }
+	  } // Enable the layer.  This shows the markers and transitions them to visible.
+
 
-	  // Enable the layer.  This shows the markers and transitions them to visible.
 	  function layerOn() {
 	    editOn();
+	    drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
+	      return dispatch.call('change');
+	    });
+	  } // Disable the layer.  This transitions the layer invisible and then hides the markers.
 
-	    drawLayer
-	      .style('opacity', 0)
-	      .transition()
-	      .duration(250)
-	      .style('opacity', 1)
-	      .on('end interrupt', function () { return dispatch.call('change'); });
-	  }
 
-	  // Disable the layer.  This transitions the layer invisible and then hides the markers.
 	  function layerOff() {
 	    throttledRedraw.cancel();
 	    drawLayer.interrupt();
-	    touchLayer.selectAll('.qaItem.improveOSM')
-	      .remove();
-
-	    drawLayer
-	      .transition()
-	      .duration(250)
-	      .style('opacity', 0)
-	      .on('end interrupt', function () {
-	        editOff();
-	        dispatch.call('change');
-	      });
-	  }
+	    touchLayer.selectAll('.qaItem.improveOSM').remove();
+	    drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+	      editOff();
+	      dispatch.call('change');
+	    });
+	  } // Update the issue markers
 
-	  // Update the issue markers
-	  function updateMarkers() {
-	    if (!layerVisible || !_layerEnabled$1) { return; }
 
+	  function updateMarkers() {
+	    if (!layerVisible || !_layerEnabled$1) return;
 	    var service = getService();
 	    var selectedID = context.selectedErrorID();
-	    var data = (service ? service.getItems(projection) : []);
-	    var getTransform = svgPointTransform(projection);
+	    var data = service ? service.getItems(projection) : [];
+	    var getTransform = svgPointTransform(projection); // Draw markers..
 
-	    // Draw markers..
-	    var markers = drawLayer.selectAll('.qaItem.improveOSM')
-	      .data(data, function (d) { return d.id; });
+	    var markers = drawLayer.selectAll('.qaItem.improveOSM').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
-	    // exit
-	    markers.exit()
-	      .remove();
+	    markers.exit().remove(); // enter
 
-	    // enter
-	    var markersEnter = markers.enter()
-	      .append('g')
-	        .attr('class', function (d) { return ("qaItem " + (d.service) + " itemId-" + (d.id) + " itemType-" + (d.itemType)); });
-
-	    markersEnter
-	      .append('polygon')
-	        .call(markerPath, 'shadow');
-
-	    markersEnter
-	      .append('ellipse')
-	        .attr('cx', 0)
-	        .attr('cy', 0)
-	        .attr('rx', 4.5)
-	        .attr('ry', 2)
-	        .attr('class', 'stroke');
-
-	    markersEnter
-	      .append('polygon')
-	        .attr('fill', 'currentColor')
-	        .call(markerPath, 'qaItem-fill');
-
-	    markersEnter
-	      .append('use')
-	        .attr('transform', 'translate(-6.5, -23)')
-	        .attr('class', 'icon-annotation')
-	        .attr('width', '13px')
-	        .attr('height', '13px')
-	        .attr('xlink:href', function (d) {
-	          var picon = d.icon;
-
-	          if (!picon) {
-	          return '';
-	          } else {
-	          var isMaki = /^maki-/.test(picon);
-	          return ("#" + picon + (isMaki ? '-11' : ''));
-	          }
-	        });
+	    var markersEnter = markers.enter().append('g').attr('class', function (d) {
+	      return "qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
+	    });
+	    markersEnter.append('polygon').call(markerPath, 'shadow');
+	    markersEnter.append('ellipse').attr('cx', 0).attr('cy', 0).attr('rx', 4.5).attr('ry', 2).attr('class', 'stroke');
+	    markersEnter.append('polygon').attr('fill', 'currentColor').call(markerPath, 'qaItem-fill');
+	    markersEnter.append('use').attr('transform', 'translate(-6.5, -23)').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('xlink:href', function (d) {
+	      var picon = d.icon;
 
-	    // update
-	    markers
-	      .merge(markersEnter)
-	      .sort(sortY)
-	        .classed('selected', function (d) { return d.id === selectedID; })
-	        .attr('transform', getTransform);
+	      if (!picon) {
+	        return '';
+	      } else {
+	        var isMaki = /^maki-/.test(picon);
+	        return "#".concat(picon).concat(isMaki ? '-11' : '');
+	      }
+	    }); // update
 
+	    markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
+	      return d.id === selectedID;
+	    }).attr('transform', getTransform); // Draw targets..
 
-	    // Draw targets..
-	    if (touchLayer.empty()) { return; }
+	    if (touchLayer.empty()) return;
 	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var targets = touchLayer.selectAll('.qaItem.improveOSM').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
-	    var targets = touchLayer.selectAll('.qaItem.improveOSM')
-	      .data(data, function (d) { return d.id; });
-
-	    // exit
-	    targets.exit()
-	      .remove();
-
-	    // enter/update
-	    targets.enter()
-	      .append('rect')
-	        .attr('width', '20px')
-	        .attr('height', '30px')
-	        .attr('x', '-10px')
-	        .attr('y', '-28px')
-	      .merge(targets)
-	      .sort(sortY)
-	        .attr('class', function (d) { return ("qaItem " + (d.service) + " target " + fillClass + " itemId-" + (d.id)); })
-	        .attr('transform', getTransform);
+	    targets.exit().remove(); // enter/update
+
+	    targets.enter().append('rect').attr('width', '20px').attr('height', '30px').attr('x', '-10px').attr('y', '-28px').merge(targets).sort(sortY).attr('class', function (d) {
+	      return "qaItem ".concat(d.service, " target ").concat(fillClass, " itemId-").concat(d.id);
+	    }).attr('transform', getTransform);
 
 	    function sortY(a, b) {
-	      return (a.id === selectedID) ? 1
-	        : (b.id === selectedID) ? -1
-	        : b.loc[1] - a.loc[1];
+	      return a.id === selectedID ? 1 : b.id === selectedID ? -1 : b.loc[1] - a.loc[1];
 	    }
-	  }
+	  } // Draw the ImproveOSM layer and schedule loading issues and updating markers.
+
 
-	  // Draw the ImproveOSM layer and schedule loading issues and updating markers.
 	  function drawImproveOSM(selection) {
 	    var service = getService();
-
 	    var surface = context.surface();
+
 	    if (surface && !surface.empty()) {
 	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
 	    }
 
-	    drawLayer = selection.selectAll('.layer-improveOSM')
-	      .data(service ? [0] : []);
-
-	    drawLayer.exit()
-	      .remove();
-
-	    drawLayer = drawLayer.enter()
-	      .append('g')
-	        .attr('class', 'layer-improveOSM')
-	        .style('display', _layerEnabled$1 ? 'block' : 'none')
-	      .merge(drawLayer);
+	    drawLayer = selection.selectAll('.layer-improveOSM').data(service ? [0] : []);
+	    drawLayer.exit().remove();
+	    drawLayer = drawLayer.enter().append('g').attr('class', 'layer-improveOSM').style('display', _layerEnabled$1 ? 'block' : 'none').merge(drawLayer);
 
 	    if (_layerEnabled$1) {
 	      if (service && ~~context.map().zoom() >= minZoom) {
@@ -69649,17 +65654,18 @@
 	        editOff();
 	      }
 	    }
-	  }
+	  } // Toggles the layer on and off
 
-	  // Toggles the layer on and off
-	  drawImproveOSM.enabled = function(val) {
-	    if (!arguments.length) { return _layerEnabled$1; }
 
+	  drawImproveOSM.enabled = function (val) {
+	    if (!arguments.length) return _layerEnabled$1;
 	    _layerEnabled$1 = val;
+
 	    if (_layerEnabled$1) {
 	      layerOn();
 	    } else {
 	      layerOff();
+
 	      if (context.selectedErrorID()) {
 	        context.enter(modeBrowse(context));
 	      }
@@ -69669,207 +65675,149 @@
 	    return this;
 	  };
 
-	  drawImproveOSM.supported = function () { return !!getService(); };
+	  drawImproveOSM.supported = function () {
+	    return !!getService();
+	  };
 
 	  return drawImproveOSM;
 	}
 
-	var _layerEnabled$2 = false;
-	var _qaService$2;
+	var _layerEnabled = false;
+
+	var _qaService;
 
 	function svgOsmose(projection, context, dispatch) {
-	  var throttledRedraw = throttle(function () { return dispatch.call('change'); }, 1000);
-	  var minZoom = 12;
+	  var throttledRedraw = throttle(function () {
+	    return dispatch.call('change');
+	  }, 1000);
 
+	  var minZoom = 12;
 	  var touchLayer = select(null);
 	  var drawLayer = select(null);
 	  var layerVisible = false;
 
 	  function markerPath(selection, klass) {
-	    selection
-	      .attr('class', klass)
-	      .attr('transform', 'translate(-10, -28)')
-	      .attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
-	  }
+	    selection.attr('class', klass).attr('transform', 'translate(-10, -28)').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
+	  } // Loosely-coupled osmose service for fetching issues
+
 
-	  // Loosely-coupled osmose service for fetching issues
 	  function getService() {
-	    if (services.osmose && !_qaService$2) {
-	      _qaService$2 = services.osmose;
-	      _qaService$2.on('loaded', throttledRedraw);
-	    } else if (!services.osmose && _qaService$2) {
-	      _qaService$2 = null;
+	    if (services.osmose && !_qaService) {
+	      _qaService = services.osmose;
+
+	      _qaService.on('loaded', throttledRedraw);
+	    } else if (!services.osmose && _qaService) {
+	      _qaService = null;
 	    }
 
-	    return _qaService$2;
-	  }
+	    return _qaService;
+	  } // Show the markers
+
 
-	  // Show the markers
 	  function editOn() {
 	    if (!layerVisible) {
 	      layerVisible = true;
-	      drawLayer
-	        .style('display', 'block');
+	      drawLayer.style('display', 'block');
 	    }
-	  }
+	  } // Immediately remove the markers and their touch targets
+
 
-	  // Immediately remove the markers and their touch targets
 	  function editOff() {
 	    if (layerVisible) {
 	      layerVisible = false;
-	      drawLayer
-	        .style('display', 'none');
-	      drawLayer.selectAll('.qaItem.osmose')
-	        .remove();
-	      touchLayer.selectAll('.qaItem.osmose')
-	        .remove();
+	      drawLayer.style('display', 'none');
+	      drawLayer.selectAll('.qaItem.osmose').remove();
+	      touchLayer.selectAll('.qaItem.osmose').remove();
 	    }
-	  }
+	  } // Enable the layer.  This shows the markers and transitions them to visible.
+
 
-	  // Enable the layer.  This shows the markers and transitions them to visible.
 	  function layerOn() {
 	    editOn();
+	    drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
+	      return dispatch.call('change');
+	    });
+	  } // Disable the layer.  This transitions the layer invisible and then hides the markers.
 
-	    drawLayer
-	      .style('opacity', 0)
-	      .transition()
-	      .duration(250)
-	      .style('opacity', 1)
-	      .on('end interrupt', function () { return dispatch.call('change'); });
-	  }
 
-	  // Disable the layer.  This transitions the layer invisible and then hides the markers.
 	  function layerOff() {
 	    throttledRedraw.cancel();
 	    drawLayer.interrupt();
-	    touchLayer.selectAll('.qaItem.osmose')
-	      .remove();
-
-	    drawLayer
-	      .transition()
-	      .duration(250)
-	      .style('opacity', 0)
-	      .on('end interrupt', function () {
-	        editOff();
-	        dispatch.call('change');
-	      });
-	  }
+	    touchLayer.selectAll('.qaItem.osmose').remove();
+	    drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+	      editOff();
+	      dispatch.call('change');
+	    });
+	  } // Update the issue markers
 
-	  // Update the issue markers
-	  function updateMarkers() {
-	    if (!layerVisible || !_layerEnabled$2) { return; }
 
+	  function updateMarkers() {
+	    if (!layerVisible || !_layerEnabled) return;
 	    var service = getService();
 	    var selectedID = context.selectedErrorID();
-	    var data = (service ? service.getItems(projection) : []);
-	    var getTransform = svgPointTransform(projection);
+	    var data = service ? service.getItems(projection) : [];
+	    var getTransform = svgPointTransform(projection); // Draw markers..
 
-	    // Draw markers..
-	    var markers = drawLayer.selectAll('.qaItem.osmose')
-	      .data(data, function (d) { return d.id; });
+	    var markers = drawLayer.selectAll('.qaItem.osmose').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
-	    // exit
-	    markers.exit()
-	      .remove();
+	    markers.exit().remove(); // enter
 
-	    // enter
-	    var markersEnter = markers.enter()
-	      .append('g')
-	        .attr('class', function (d) { return ("qaItem " + (d.service) + " itemId-" + (d.id) + " itemType-" + (d.itemType)); });
-
-	    markersEnter
-	      .append('polygon')
-	        .call(markerPath, 'shadow');
-
-	    markersEnter
-	      .append('ellipse')
-	        .attr('cx', 0)
-	        .attr('cy', 0)
-	        .attr('rx', 4.5)
-	        .attr('ry', 2)
-	        .attr('class', 'stroke');
-
-	    markersEnter
-	      .append('polygon')
-	        .attr('fill', function (d) { return service.getColor(d.item); })
-	        .call(markerPath, 'qaItem-fill');
-
-	    markersEnter
-	      .append('use')
-	        .attr('transform', 'translate(-6.5, -23)')
-	        .attr('class', 'icon-annotation')
-	        .attr('width', '13px')
-	        .attr('height', '13px')
-	        .attr('xlink:href', function (d) {
-	          var picon = d.icon;
-
-	          if (!picon) {
-	            return '';
-	          } else {
-	            var isMaki = /^maki-/.test(picon);
-	            return ("#" + picon + (isMaki ? '-11' : ''));
-	          }
-	        });
+	    var markersEnter = markers.enter().append('g').attr('class', function (d) {
+	      return "qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
+	    });
+	    markersEnter.append('polygon').call(markerPath, 'shadow');
+	    markersEnter.append('ellipse').attr('cx', 0).attr('cy', 0).attr('rx', 4.5).attr('ry', 2).attr('class', 'stroke');
+	    markersEnter.append('polygon').attr('fill', function (d) {
+	      return service.getColor(d.item);
+	    }).call(markerPath, 'qaItem-fill');
+	    markersEnter.append('use').attr('transform', 'translate(-6.5, -23)').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('xlink:href', function (d) {
+	      var picon = d.icon;
+
+	      if (!picon) {
+	        return '';
+	      } else {
+	        var isMaki = /^maki-/.test(picon);
+	        return "#".concat(picon).concat(isMaki ? '-11' : '');
+	      }
+	    }); // update
 
-	    // update
-	    markers
-	      .merge(markersEnter)
-	      .sort(sortY)
-	        .classed('selected', function (d) { return d.id === selectedID; })
-	        .attr('transform', getTransform);
-
-	    // Draw targets..
-	    if (touchLayer.empty()) { return; }
+	    markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
+	      return d.id === selectedID;
+	    }).attr('transform', getTransform); // Draw targets..
+
+	    if (touchLayer.empty()) return;
 	    var fillClass = context.getDebug('target') ? 'pink' : 'nocolor';
+	    var targets = touchLayer.selectAll('.qaItem.osmose').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
-	    var targets = touchLayer.selectAll('.qaItem.osmose')
-	      .data(data, function (d) { return d.id; });
-
-	    // exit
-	    targets.exit()
-	      .remove();
-
-	    // enter/update
-	    targets.enter()
-	      .append('rect')
-	        .attr('width', '20px')
-	        .attr('height', '30px')
-	        .attr('x', '-10px')
-	        .attr('y', '-28px')
-	      .merge(targets)
-	      .sort(sortY)
-	        .attr('class', function (d) { return ("qaItem " + (d.service) + " target " + fillClass + " itemId-" + (d.id)); })
-	        .attr('transform', getTransform);
+	    targets.exit().remove(); // enter/update
+
+	    targets.enter().append('rect').attr('width', '20px').attr('height', '30px').attr('x', '-10px').attr('y', '-28px').merge(targets).sort(sortY).attr('class', function (d) {
+	      return "qaItem ".concat(d.service, " target ").concat(fillClass, " itemId-").concat(d.id);
+	    }).attr('transform', getTransform);
 
 	    function sortY(a, b) {
-	      return (a.id === selectedID) ? 1
-	        : (b.id === selectedID) ? -1
-	        : b.loc[1] - a.loc[1];
+	      return a.id === selectedID ? 1 : b.id === selectedID ? -1 : b.loc[1] - a.loc[1];
 	    }
-	  }
+	  } // Draw the Osmose layer and schedule loading issues and updating markers.
+
 
-	  // Draw the Osmose layer and schedule loading issues and updating markers.
 	  function drawOsmose(selection) {
 	    var service = getService();
-
 	    var surface = context.surface();
+
 	    if (surface && !surface.empty()) {
 	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
 	    }
 
-	    drawLayer = selection.selectAll('.layer-osmose')
-	      .data(service ? [0] : []);
-
-	    drawLayer.exit()
-	      .remove();
+	    drawLayer = selection.selectAll('.layer-osmose').data(service ? [0] : []);
+	    drawLayer.exit().remove();
+	    drawLayer = drawLayer.enter().append('g').attr('class', 'layer-osmose').style('display', _layerEnabled ? 'block' : 'none').merge(drawLayer);
 
-	    drawLayer = drawLayer.enter()
-	      .append('g')
-	        .attr('class', 'layer-osmose')
-	        .style('display', _layerEnabled$2 ? 'block' : 'none')
-	      .merge(drawLayer);
-
-	    if (_layerEnabled$2) {
+	    if (_layerEnabled) {
 	      if (service && ~~context.map().zoom() >= minZoom) {
 	        editOn();
 	        service.loadIssues(projection);
@@ -69878,24 +65826,23 @@
 	        editOff();
 	      }
 	    }
-	  }
+	  } // Toggles the layer on and off
 
-	  // Toggles the layer on and off
-	  drawOsmose.enabled = function(val) {
-	    if (!arguments.length) { return _layerEnabled$2; }
 
-	    _layerEnabled$2 = val;
-	    if (_layerEnabled$2) {
+	  drawOsmose.enabled = function (val) {
+	    if (!arguments.length) return _layerEnabled;
+	    _layerEnabled = val;
+
+	    if (_layerEnabled) {
 	      // Strings supplied by Osmose fetched before showing layer for first time
 	      // NOTE: Currently no way to change locale in iD at runtime, would need to re-call this method if that's ever implemented
 	      // Also, If layer is toggled quickly multiple requests are sent
-	      getService().loadStrings()
-	        .then(layerOn)
-	        .catch(function (err) {
-	          console.log(err); // eslint-disable-line no-console
-	        });
+	      getService().loadStrings().then(layerOn)["catch"](function (err) {
+	        console.log(err); // eslint-disable-line no-console
+	      });
 	    } else {
 	      layerOff();
+
 	      if (context.selectedErrorID()) {
 	        context.enter(modeBrowse(context));
 	      }
@@ -69905,3096 +65852,2674 @@
 	    return this;
 	  };
 
-	  drawOsmose.supported = function () { return !!getService(); };
+	  drawOsmose.supported = function () {
+	    return !!getService();
+	  };
 
 	  return drawOsmose;
 	}
 
 	function svgStreetside(projection, context, dispatch) {
-	    var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-	    var minZoom = 14;
-	    var minMarkerZoom = 16;
-	    var minViewfieldZoom = 18;
-	    var layer = select(null);
-	    var _viewerYaw = 0;
-	    var _selectedSequence = null;
-	    var _streetside;
-
-	    /**
-	     * init().
-	     */
-	    function init() {
-	        if (svgStreetside.initialized) { return; }  // run once
-	        svgStreetside.enabled = false;
-	        svgStreetside.initialized = true;
-	    }
-
-	    /**
-	     * getService().
-	     */
-	    function getService() {
-	        if (services.streetside && !_streetside) {
-	            _streetside = services.streetside;
-	            _streetside.event
-	                .on('viewerChanged.svgStreetside', viewerChanged)
-	                .on('loadedBubbles.svgStreetside', throttledRedraw);
-	        } else if (!services.streetside && _streetside) {
-	            _streetside = null;
-	        }
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	        return _streetside;
-	    }
+	  var minZoom = 14;
+	  var minMarkerZoom = 16;
+	  var minViewfieldZoom = 18;
+	  var layer = select(null);
+	  var _viewerYaw = 0;
+	  var _selectedSequence = null;
 
-	    /**
-	     * showLayer().
-	     */
-	    function showLayer() {
-	        var service = getService();
-	        if (!service) { return; }
+	  var _streetside;
+	  /**
+	   * init().
+	   */
 
-	        editOn();
 
-	        layer
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1)
-	            .on('end', function () { dispatch.call('change'); });
-	    }
+	  function init() {
+	    if (svgStreetside.initialized) return; // run once
 
-	    /**
-	     * hideLayer().
-	     */
-	    function hideLayer() {
-	        throttledRedraw.cancel();
+	    svgStreetside.enabled = false;
+	    svgStreetside.initialized = true;
+	  }
+	  /**
+	   * getService().
+	   */
 
-	        layer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0)
-	            .on('end', editOff);
-	    }
 
-	    /**
-	     * editOn().
-	     */
-	    function editOn() {
-	        layer.style('display', 'block');
-	    }
+	  function getService() {
+	    if (services.streetside && !_streetside) {
+	      _streetside = services.streetside;
 
-	    /**
-	     * editOff().
-	     */
-	    function editOff() {
-	        layer.selectAll('.viewfield-group').remove();
-	        layer.style('display', 'none');
+	      _streetside.event.on('viewerChanged.svgStreetside', viewerChanged).on('loadedImages.svgStreetside', throttledRedraw);
+	    } else if (!services.streetside && _streetside) {
+	      _streetside = null;
 	    }
 
-	    /**
-	     * click() Handles 'bubble' point click event.
-	     */
-	    function click(d) {
-	        var service = getService();
-	        if (!service) { return; }
-
-	        // try to preserve the viewer rotation when staying on the same sequence
-	        if (d.sequenceKey !== _selectedSequence) {
-	            _viewerYaw = 0;  // reset
-	        }
-	        _selectedSequence = d.sequenceKey;
-
-	        service
-	            .selectImage(context, d)
-	            .then(function (response) {
-	                if (response.status === 'ok'){
-	                    service.showViewer(context, _viewerYaw);
-	                }
-	            });
+	    return _streetside;
+	  }
+	  /**
+	   * showLayer().
+	   */
 
 
-	        context.map().centerEase(d.loc);
-	    }
+	  function showLayer() {
+	    var service = getService();
+	    if (!service) return;
+	    editOn();
+	    layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
+	      dispatch.call('change');
+	    });
+	  }
+	  /**
+	   * hideLayer().
+	   */
 
-	    /**
-	     * mouseover().
-	     */
-	    function mouseover(d) {
-	        var service = getService();
-	        if (service) { service.setStyles(context, d); }
-	    }
 
-	    /**
-	     * mouseout().
-	     */
-	    function mouseout() {
-	        var service = getService();
-	        if (service) { service.setStyles(context, null); }
-	    }
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    layer.transition().duration(250).style('opacity', 0).on('end', editOff);
+	  }
+	  /**
+	   * editOn().
+	   */
 
-	    /**
-	     * transform().
-	     */
-	    function transform(d) {
-	        var t = svgPointTransform(projection)(d);
-	        var rot = d.ca + _viewerYaw;
-	        if (rot) {
-	            t += ' rotate(' + Math.floor(rot) + ',0,0)';
-	        }
-	        return t;
-	    }
 
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
+	  /**
+	   * editOff().
+	   */
 
-	    function viewerChanged() {
-	        var service = getService();
-	        if (!service) { return; }
 
-	        var viewer = service.viewer();
-	        if (!viewer) { return; }
+	  function editOff() {
+	    layer.selectAll('.viewfield-group').remove();
+	    layer.style('display', 'none');
+	  }
+	  /**
+	   * click() Handles 'bubble' point click event.
+	   */
 
-	        // update viewfield rotation
-	        _viewerYaw = viewer.getYaw();
 
-	        // avoid updating if the map is currently transformed
-	        // e.g. during drags or easing.
-	        if (context.map().isTransformed()) { return; }
+	  function click(d3_event, d) {
+	    var service = getService();
+	    if (!service) return; // try to preserve the viewer rotation when staying on the same sequence
 
-	        layer.selectAll('.viewfield-group.currentView')
-	            .attr('transform', transform);
+	    if (d.sequenceKey !== _selectedSequence) {
+	      _viewerYaw = 0; // reset
 	    }
 
+	    _selectedSequence = d.sequenceKey;
+	    service.ensureViewerLoaded(context).then(function () {
+	      service.selectImage(context, d.key).yaw(_viewerYaw).showViewer(context);
+	    });
+	    context.map().centerEase(d.loc);
+	  }
+	  /**
+	   * mouseover().
+	   */
 
-	    context.photos().on('change.streetside', update);
-
-	    /**
-	     * update().
-	     */
-	    function update() {
-	        var viewer = context.container().select('.photoviewer');
-	        var selected = viewer.empty() ? undefined : viewer.datum();
-	        var z = ~~context.map().zoom();
-	        var showMarkers = (z >= minMarkerZoom);
-	        var showViewfields = (z >= minViewfieldZoom);
-	        var service = getService();
-
-	        var sequences = [];
-	        var bubbles = [];
-
-	        if (context.photos().showsPanoramic()) {
-	            sequences = (service ? service.sequences(projection) : []);
-	            bubbles = (service && showMarkers ? service.bubbles(projection) : []);
-	        }
-
-	        var traces = layer.selectAll('.sequences').selectAll('.sequence')
-	            .data(sequences, function(d) { return d.properties.key; });
 
-	        // exit
-	        traces.exit()
-	            .remove();
+	  function mouseover(d3_event, d) {
+	    var service = getService();
+	    if (service) service.setStyles(context, d);
+	  }
+	  /**
+	   * mouseout().
+	   */
 
-	        // enter/update
-	        traces = traces.enter()
-	            .append('path')
-	            .attr('class', 'sequence')
-	            .merge(traces)
-	            .attr('d', svgPath(projection).geojson);
 
+	  function mouseout() {
+	    var service = getService();
+	    if (service) service.setStyles(context, null);
+	  }
+	  /**
+	   * transform().
+	   */
 
-	        var groups = layer.selectAll('.markers').selectAll('.viewfield-group')
-	            .data(bubbles, function(d) {
-	                // force reenter once bubbles are attached to a sequence
-	                return d.key + (d.sequenceKey ? 'v1' : 'v0');
-	            });
 
-	        // exit
-	        groups.exit()
-	            .remove();
-
-	        // enter
-	        var groupsEnter = groups.enter()
-	            .append('g')
-	            .attr('class', 'viewfield-group')
-	            .on('mouseenter', mouseover)
-	            .on('mouseleave', mouseout)
-	            .on('click', click);
-
-	        groupsEnter
-	            .append('g')
-	            .attr('class', 'viewfield-scale');
-
-	        // update
-	        var markers = groups
-	            .merge(groupsEnter)
-	            .sort(function(a, b) {
-	                return (a === selected) ? 1
-	                    : (b === selected) ? -1
-	                    : b.loc[1] - a.loc[1];
-	            })
-	            .attr('transform', transform)
-	            .select('.viewfield-scale');
-
-
-	        markers.selectAll('circle')
-	            .data([0])
-	            .enter()
-	            .append('circle')
-	            .attr('dx', '0')
-	            .attr('dy', '0')
-	            .attr('r', '6');
-
-	        var viewfields = markers.selectAll('.viewfield')
-	            .data(showViewfields ? [0] : []);
-
-	        viewfields.exit()
-	            .remove();
-
-	        // viewfields may or may not be drawn...
-	        // but if they are, draw below the circles
-	        viewfields.enter()
-	            .insert('path', 'circle')
-	            .attr('class', 'viewfield')
-	            .attr('transform', 'scale(1.5,1.5),translate(-8, -13)')
-	            .attr('d', viewfieldPath);
-
-	        function viewfieldPath() {
-	            var d = this.parentNode.__data__;
-	            if (d.pano) {
-	                return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-	            } else {
-	                return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
-	            }
-	        }
+	  function transform(d) {
+	    var t = svgPointTransform(projection)(d);
+	    var rot = d.ca + _viewerYaw;
 
+	    if (rot) {
+	      t += ' rotate(' + Math.floor(rot) + ',0,0)';
 	    }
 
-	    /**
-	     * drawImages()
-	     * drawImages is the method that is returned (and that runs) every time 'svgStreetside()' is called.
-	     * 'svgStreetside()' is called from index.js
-	     */
-	    function drawImages(selection) {
-	        var enabled = svgStreetside.enabled;
-	        var service = getService();
-
-	        layer = selection.selectAll('.layer-streetside-images')
-	            .data(service ? [0] : []);
-
-	        layer.exit()
-	            .remove();
+	    return t;
+	  }
 
-	        var layerEnter = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-streetside-images')
-	            .style('display', enabled ? 'block' : 'none');
+	  function viewerChanged() {
+	    var service = getService();
+	    if (!service) return;
+	    var viewer = service.viewer();
+	    if (!viewer) return; // update viewfield rotation
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'sequences');
+	    _viewerYaw = viewer.getYaw(); // avoid updating if the map is currently transformed
+	    // e.g. during drags or easing.
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'markers');
+	    if (context.map().isTransformed()) return;
+	    layer.selectAll('.viewfield-group.currentView').attr('transform', transform);
+	  }
 
-	        layer = layerEnter
-	            .merge(layer);
+	  function filterBubbles(bubbles) {
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
+	    var usernames = context.photos().usernames();
 
-	        if (enabled) {
-	            if (service && ~~context.map().zoom() >= minZoom) {
-	                editOn();
-	                update();
-	                service.loadBubbles(projection);
-	            } else {
-	                editOff();
-	            }
-	        }
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      bubbles = bubbles.filter(function (bubble) {
+	        return new Date(bubble.captured_at).getTime() >= fromTimestamp;
+	      });
 	    }
 
-
-	    /**
-	     * drawImages.enabled().
-	     */
-	    drawImages.enabled = function(_) {
-	        if (!arguments.length) { return svgStreetside.enabled; }
-	        svgStreetside.enabled = _;
-	        if (svgStreetside.enabled) {
-	            showLayer();
-	        } else {
-	            hideLayer();
-	        }
-	        dispatch.call('change');
-	        return this;
-	    };
-
-	    /**
-	     * drawImages.supported().
-	     */
-	    drawImages.supported = function() {
-	        return !!getService();
-	    };
-
-	    init();
-
-	    return drawImages;
-	}
-
-	function svgMapillaryImages(projection, context, dispatch) {
-	    var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-	    var minZoom = 12;
-	    var minMarkerZoom = 16;
-	    var minViewfieldZoom = 18;
-	    var layer = select(null);
-	    var _mapillary;
-	    var viewerCompassAngle;
-
-
-	    function init() {
-	        if (svgMapillaryImages.initialized) { return; }  // run once
-	        svgMapillaryImages.enabled = false;
-	        svgMapillaryImages.initialized = true;
-	    }
-
-
-	    function getService() {
-	        if (services.mapillary && !_mapillary) {
-	            _mapillary = services.mapillary;
-	            _mapillary.event.on('loadedImages', throttledRedraw);
-	            _mapillary.event.on('bearingChanged', function(e) {
-	                viewerCompassAngle = e;
-
-	                // avoid updating if the map is currently transformed
-	                // e.g. during drags or easing.
-	                if (context.map().isTransformed()) { return; }
-
-	                layer.selectAll('.viewfield-group.currentView')
-	                    .filter(function(d) {
-	                        return d.pano;
-	                    })
-	                    .attr('transform', transform);
-	            });
-	        } else if (!services.mapillary && _mapillary) {
-	            _mapillary = null;
-	        }
-
-	        return _mapillary;
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      bubbles = bubbles.filter(function (bubble) {
+	        return new Date(bubble.captured_at).getTime() <= toTimestamp;
+	      });
 	    }
 
-
-	    function showLayer() {
-	        var service = getService();
-	        if (!service) { return; }
-
-	        editOn();
-
-	        layer
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1)
-	            .on('end', function () { dispatch.call('change'); });
+	    if (usernames) {
+	      bubbles = bubbles.filter(function (bubble) {
+	        return usernames.indexOf(bubble.captured_by) !== -1;
+	      });
 	    }
 
+	    return bubbles;
+	  }
 
-	    function hideLayer() {
-	        throttledRedraw.cancel();
+	  function filterSequences(sequences) {
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
+	    var usernames = context.photos().usernames();
 
-	        layer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0)
-	            .on('end', editOff);
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      sequences = sequences.filter(function (sequences) {
+	        return new Date(sequences.properties.captured_at).getTime() >= fromTimestamp;
+	      });
 	    }
 
-
-	    function editOn() {
-	        layer.style('display', 'block');
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      sequences = sequences.filter(function (sequences) {
+	        return new Date(sequences.properties.captured_at).getTime() <= toTimestamp;
+	      });
 	    }
 
-
-	    function editOff() {
-	        layer.selectAll('.viewfield-group').remove();
-	        layer.style('display', 'none');
+	    if (usernames) {
+	      sequences = sequences.filter(function (sequences) {
+	        return usernames.indexOf(sequences.properties.captured_by) !== -1;
+	      });
 	    }
 
+	    return sequences;
+	  }
+	  /**
+	   * update().
+	   */
 
-	    function click(d) {
-	        var service = getService();
-	        if (!service) { return; }
 
-	        service
-	            .selectImage(context, d.key)
-	            .updateViewer(context, d.key)
-	            .showViewer(context);
+	  function update() {
+	    var viewer = context.container().select('.photoviewer');
+	    var selected = viewer.empty() ? undefined : viewer.datum();
+	    var z = ~~context.map().zoom();
+	    var showMarkers = z >= minMarkerZoom;
+	    var showViewfields = z >= minViewfieldZoom;
+	    var service = getService();
+	    var sequences = [];
+	    var bubbles = [];
 
-	        context.map().centerEase(d.loc);
+	    if (context.photos().showsPanoramic()) {
+	      sequences = service ? service.sequences(projection) : [];
+	      bubbles = service && showMarkers ? service.bubbles(projection) : [];
+	      sequences = filterSequences(sequences);
+	      bubbles = filterBubbles(bubbles);
 	    }
 
+	    var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
+	      return d.properties.key;
+	    }); // exit
 
-	    function mouseover(d) {
-	        var service = getService();
-	        if (service) { service.setStyles(context, d); }
-	    }
+	    traces.exit().remove(); // enter/update
 
+	    traces = traces.enter().append('path').attr('class', 'sequence').merge(traces).attr('d', svgPath(projection).geojson);
+	    var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(bubbles, function (d) {
+	      // force reenter once bubbles are attached to a sequence
+	      return d.key + (d.sequenceKey ? 'v1' : 'v0');
+	    }); // exit
 
-	    function mouseout() {
-	        var service = getService();
-	        if (service) { service.setStyles(context, null); }
-	    }
+	    groups.exit().remove(); // enter
 
+	    var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group').on('mouseenter', mouseover).on('mouseleave', mouseout).on('click', click);
+	    groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
 
-	    function transform(d) {
-	        var t = svgPointTransform(projection)(d);
-	        if (d.pano && viewerCompassAngle !== null && isFinite(viewerCompassAngle)) {
-	            t += ' rotate(' + Math.floor(viewerCompassAngle) + ',0,0)';
-	        } else if (d.ca) {
-	            t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
-	        }
-	        return t;
-	    }
+	    var markers = groups.merge(groupsEnter).sort(function (a, b) {
+	      return a === selected ? 1 : b === selected ? -1 : b.loc[1] - a.loc[1];
+	    }).attr('transform', transform).select('.viewfield-scale');
+	    markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
+	    var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
+	    viewfields.exit().remove(); // viewfields may or may not be drawn...
+	    // but if they are, draw below the circles
 
-	    context.photos().on('change.mapillary_images', update);
+	    viewfields.enter().insert('path', 'circle').attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);
 
-	    function filterImages(images) {
-	        var showsPano = context.photos().showsPanoramic();
-	        var showsFlat = context.photos().showsFlat();
-	        if (!showsPano || !showsFlat) {
-	            images = images.filter(function(image) {
-	                if (image.pano) { return showsPano; }
-	                return showsFlat;
-	            });
-	        }
-	        return images;
-	    }
+	    function viewfieldPath() {
+	      var d = this.parentNode.__data__;
 
-	    function filterSequences(sequences, service) {
-	        var showsPano = context.photos().showsPanoramic();
-	        var showsFlat = context.photos().showsFlat();
-	        if (!showsPano || !showsFlat) {
-	            sequences = sequences.filter(function(sequence) {
-	                if (sequence.properties.hasOwnProperty('pano')) {
-	                    if (sequence.properties.pano) { return showsPano; }
-	                    return showsFlat;
-	                } else {
-	                    // if the sequence doesn't specify pano or not, search its images
-	                    var cProps = sequence.properties.coordinateProperties;
-	                    if (cProps && cProps.image_keys && cProps.image_keys.length > 0) {
-	                        for (var index in cProps.image_keys) {
-	                            var imageKey = cProps.image_keys[index];
-	                            var image = service.cachedImage(imageKey);
-	                            if (image && image.hasOwnProperty('pano')) {
-	                                if (image.pano) { return showsPano; }
-	                                return showsFlat;
-	                            }
-	                        }
-	                    }
-	                }
-	            });
-	        }
-	        return sequences;
+	      if (d.pano) {
+	        return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+	      } else {
+	        return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+	      }
 	    }
+	  }
+	  /**
+	   * drawImages()
+	   * drawImages is the method that is returned (and that runs) every time 'svgStreetside()' is called.
+	   * 'svgStreetside()' is called from index.js
+	   */
 
-	    function update() {
 
-	        var z = ~~context.map().zoom();
-	        var showMarkers = (z >= minMarkerZoom);
-	        var showViewfields = (z >= minViewfieldZoom);
-
-	        var service = getService();
-	        var selectedKey = service && service.getSelectedImageKey();
-	        var sequences = (service ? service.sequences(projection) : []);
-	        var images = (service && showMarkers ? service.images(projection) : []);
-
-	        images = filterImages(images);
-	        sequences = filterSequences(sequences, service);
-
-	        var traces = layer.selectAll('.sequences').selectAll('.sequence')
-	            .data(sequences, function(d) { return d.properties.key; });
-
-	        // exit
-	        traces.exit()
-	            .remove();
-
-	        // enter/update
-	        traces = traces.enter()
-	            .append('path')
-	            .attr('class', 'sequence')
-	            .merge(traces)
-	            .attr('d', svgPath(projection).geojson);
-
-
-	        var groups = layer.selectAll('.markers').selectAll('.viewfield-group')
-	            .data(images, function(d) { return d.key; });
-
-	        // exit
-	        groups.exit()
-	            .remove();
-
-	        // enter
-	        var groupsEnter = groups.enter()
-	            .append('g')
-	            .attr('class', 'viewfield-group')
-	            .on('mouseenter', mouseover)
-	            .on('mouseleave', mouseout)
-	            .on('click', click);
-
-	        groupsEnter
-	            .append('g')
-	            .attr('class', 'viewfield-scale');
-
-	        // update
-	        var markers = groups
-	            .merge(groupsEnter)
-	            .sort(function(a, b) {
-	                return (a.key === selectedKey) ? 1
-	                    : (b.key === selectedKey) ? -1
-	                    : b.loc[1] - a.loc[1];  // sort Y
-	            })
-	            .attr('transform', transform)
-	            .select('.viewfield-scale');
-
-
-	        markers.selectAll('circle')
-	            .data([0])
-	            .enter()
-	            .append('circle')
-	            .attr('dx', '0')
-	            .attr('dy', '0')
-	            .attr('r', '6');
-
-	        var viewfields = markers.selectAll('.viewfield')
-	            .data(showViewfields ? [0] : []);
-
-	        viewfields.exit()
-	            .remove();
-
-	        viewfields.enter()               // viewfields may or may not be drawn...
-	            .insert('path', 'circle')    // but if they are, draw below the circles
-	            .attr('class', 'viewfield')
-	            .classed('pano', function() { return this.parentNode.__data__.pano; })
-	            .attr('transform', 'scale(1.5,1.5),translate(-8, -13)')
-	            .attr('d', viewfieldPath);
-
-	        function viewfieldPath() {
-	            var d = this.parentNode.__data__;
-	            if (d.pano) {
-	                return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-	            } else {
-	                return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
-	            }
-	        }
+	  function drawImages(selection) {
+	    var enabled = svgStreetside.enabled;
+	    var service = getService();
+	    layer = selection.selectAll('.layer-streetside-images').data(service ? [0] : []);
+	    layer.exit().remove();
+	    var layerEnter = layer.enter().append('g').attr('class', 'layer-streetside-images').style('display', enabled ? 'block' : 'none');
+	    layerEnter.append('g').attr('class', 'sequences');
+	    layerEnter.append('g').attr('class', 'markers');
+	    layer = layerEnter.merge(layer);
+
+	    if (enabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        update();
+	        service.loadBubbles(projection);
+	      } else {
+	        editOff();
+	      }
 	    }
+	  }
+	  /**
+	   * drawImages.enabled().
+	   */
 
 
-	    function drawImages(selection) {
-	        var enabled = svgMapillaryImages.enabled;
-	        var service = getService();
-
-	        layer = selection.selectAll('.layer-mapillary')
-	            .data(service ? [0] : []);
-
-	        layer.exit()
-	            .remove();
-
-	        var layerEnter = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-mapillary')
-	            .style('display', enabled ? 'block' : 'none');
-
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'sequences');
-
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'markers');
-
-	        layer = layerEnter
-	            .merge(layer);
+	  drawImages.enabled = function (_) {
+	    if (!arguments.length) return svgStreetside.enabled;
+	    svgStreetside.enabled = _;
 
-	        if (enabled) {
-	            if (service && ~~context.map().zoom() >= minZoom) {
-	                editOn();
-	                update();
-	                service.loadImages(projection);
-	            } else {
-	                editOff();
-	            }
-	        }
+	    if (svgStreetside.enabled) {
+	      showLayer();
+	      context.photos().on('change.streetside', update);
+	    } else {
+	      hideLayer();
+	      context.photos().on('change.streetside', null);
 	    }
 
+	    dispatch.call('change');
+	    return this;
+	  };
+	  /**
+	   * drawImages.supported().
+	   */
 
-	    drawImages.enabled = function(_) {
-	        if (!arguments.length) { return svgMapillaryImages.enabled; }
-	        svgMapillaryImages.enabled = _;
-	        if (svgMapillaryImages.enabled) {
-	            showLayer();
-	        } else {
-	            hideLayer();
-	        }
-	        dispatch.call('change');
-	        return this;
-	    };
-
-
-	    drawImages.supported = function() {
-	        return !!getService();
-	    };
 
+	  drawImages.supported = function () {
+	    return !!getService();
+	  };
 
-	    init();
-	    return drawImages;
+	  init();
+	  return drawImages;
 	}
 
-	function svgMapillarySigns(projection, context, dispatch) {
-	    var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-	    var minZoom = 12;
-	    var layer = select(null);
-	    var _mapillary;
-
-
-	    function init() {
-	        if (svgMapillarySigns.initialized) { return; }  // run once
-	        svgMapillarySigns.enabled = false;
-	        svgMapillarySigns.initialized = true;
-	    }
-
-
-	    function getService() {
-	        if (services.mapillary && !_mapillary) {
-	            _mapillary = services.mapillary;
-	            _mapillary.event.on('loadedSigns', throttledRedraw);
-	        } else if (!services.mapillary && _mapillary) {
-	            _mapillary = null;
-	        }
-	        return _mapillary;
-	    }
-
+	function svgMapillaryImages(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	    function showLayer() {
-	        var service = getService();
-	        if (!service) { return; }
+	  var minZoom = 12;
+	  var minMarkerZoom = 16;
+	  var minViewfieldZoom = 18;
+	  var layer = select(null);
 
-	        editOn();
-	    }
+	  var _mapillary;
 
+	  function init() {
+	    if (svgMapillaryImages.initialized) return; // run once
 
-	    function hideLayer() {
-	        throttledRedraw.cancel();
-	        editOff();
-	    }
+	    svgMapillaryImages.enabled = false;
+	    svgMapillaryImages.initialized = true;
+	  }
 
+	  function getService() {
+	    if (services.mapillary && !_mapillary) {
+	      _mapillary = services.mapillary;
 
-	    function editOn() {
-	        layer.style('display', 'block');
+	      _mapillary.event.on('loadedImages', throttledRedraw);
+	    } else if (!services.mapillary && _mapillary) {
+	      _mapillary = null;
 	    }
 
+	    return _mapillary;
+	  }
 
-	    function editOff() {
-	        layer.selectAll('.icon-sign').remove();
-	        layer.style('display', 'none');
-	    }
+	  function showLayer() {
+	    var service = getService();
+	    if (!service) return;
+	    editOn();
+	    layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
+	      dispatch.call('change');
+	    });
+	  }
 
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    layer.transition().duration(250).style('opacity', 0).on('end', editOff);
+	  }
 
-	    function click(d) {
-	        var service = getService();
-	        if (!service) { return; }
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
 
-	        context.map().centerEase(d.loc);
+	  function editOff() {
+	    layer.selectAll('.viewfield-group').remove();
+	    layer.style('display', 'none');
+	  }
 
-	        var selectedImageKey = service.getSelectedImageKey();
-	        var imageKey;
+	  function click(d3_event, image) {
+	    var service = getService();
+	    if (!service) return;
+	    service.ensureViewerLoaded(context).then(function () {
+	      service.selectImage(context, image.id).showViewer(context);
+	    });
+	    context.map().centerEase(image.loc);
+	  }
 
-	        // Pick one of the images the sign was detected in,
-	        // preference given to an image already selected.
-	        d.detections.forEach(function(detection) {
-	            if (!imageKey || selectedImageKey === detection.image_key) {
-	                imageKey = detection.image_key;
-	            }
-	        });
+	  function mouseover(d3_event, image) {
+	    var service = getService();
+	    if (service) service.setStyles(context, image);
+	  }
 
-	        service
-	            .selectImage(context, imageKey)
-	            .updateViewer(context, imageKey)
-	            .showViewer(context);
-	    }
+	  function mouseout() {
+	    var service = getService();
+	    if (service) service.setStyles(context, null);
+	  }
 
+	  function transform(d) {
+	    var t = svgPointTransform(projection)(d);
 
-	    function update() {
-	        var service = getService();
-	        var data = (service ? service.signs(projection) : []);
-	        var selectedImageKey = service.getSelectedImageKey();
-	        var transform = svgPointTransform(projection);
-
-	        var signs = layer.selectAll('.icon-sign')
-	            .data(data, function(d) { return d.key; });
-
-	        // exit
-	        signs.exit()
-	            .remove();
-
-	        // enter
-	        var enter = signs.enter()
-	            .append('g')
-	            .attr('class', 'icon-sign icon-detected')
-	            .on('click', click);
-
-	        enter
-	            .append('use')
-	            .attr('width', '24px')
-	            .attr('height', '24px')
-	            .attr('x', '-12px')
-	            .attr('y', '-12px')
-	            .attr('xlink:href', function(d) { return '#' + d.value; });
-
-	        enter
-	            .append('rect')
-	            .attr('width', '24px')
-	            .attr('height', '24px')
-	            .attr('x', '-12px')
-	            .attr('y', '-12px');
-
-	        // update
-	        signs
-	            .merge(enter)
-	            .attr('transform', transform)
-	            .classed('currentView', function(d) {
-	                return d.detections.some(function(detection) {
-	                    return detection.image_key === selectedImageKey;
-	                });
-	            })
-	            .sort(function(a, b) {
-	                var aSelected = a.detections.some(function(detection) {
-	                    return detection.image_key === selectedImageKey;
-	                });
-	                var bSelected = b.detections.some(function(detection) {
-	                    return detection.image_key === selectedImageKey;
-	                });
-	                if (aSelected === bSelected) {
-	                    return b.loc[1] - a.loc[1]; // sort Y
-	                } else if (aSelected) {
-	                    return 1;
-	                }
-	                return -1;
-	            });
+	    if (d.ca) {
+	      t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
 	    }
 
+	    return t;
+	  }
 
-	    function drawSigns(selection) {
-	        var enabled = svgMapillarySigns.enabled;
-	        var service = getService();
-
-	        layer = selection.selectAll('.layer-mapillary-signs')
-	            .data(service ? [0] : []);
-
-	        layer.exit()
-	            .remove();
-
-	        layer = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-mapillary-signs layer-mapillary-detections')
-	            .style('display', enabled ? 'block' : 'none')
-	            .merge(layer);
+	  function filterImages(images) {
+	    var showsPano = context.photos().showsPanoramic();
+	    var showsFlat = context.photos().showsFlat();
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
 
-	        if (enabled) {
-	            if (service && ~~context.map().zoom() >= minZoom) {
-	                editOn();
-	                update();
-	                service.loadSigns(projection);
-	            } else {
-	                editOff();
-	            }
-	        }
+	    if (!showsPano || !showsFlat) {
+	      images = images.filter(function (image) {
+	        if (image.is_pano) return showsPano;
+	        return showsFlat;
+	      });
 	    }
 
+	    if (fromDate) {
+	      images = images.filter(function (image) {
+	        return new Date(image.captured_at).getTime() >= new Date(fromDate).getTime();
+	      });
+	    }
 
-	    drawSigns.enabled = function(_) {
-	        if (!arguments.length) { return svgMapillarySigns.enabled; }
-	        svgMapillarySigns.enabled = _;
-	        if (svgMapillarySigns.enabled) {
-	            showLayer();
-	        } else {
-	            hideLayer();
-	        }
-	        dispatch.call('change');
-	        return this;
-	    };
-
-
-	    drawSigns.supported = function() {
-	        return !!getService();
-	    };
-
+	    if (toDate) {
+	      images = images.filter(function (image) {
+	        return new Date(image.captured_at).getTime() <= new Date(toDate).getTime();
+	      });
+	    }
 
-	    init();
-	    return drawSigns;
-	}
+	    return images;
+	  }
 
-	function svgMapillaryMapFeatures(projection, context, dispatch) {
-	    var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-	    var minZoom = 12;
-	    var layer = select(null);
-	    var _mapillary;
+	  function filterSequences(sequences) {
+	    var showsPano = context.photos().showsPanoramic();
+	    var showsFlat = context.photos().showsFlat();
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
 
+	    if (!showsPano || !showsFlat) {
+	      sequences = sequences.filter(function (sequence) {
+	        if (sequence.properties.hasOwnProperty('is_pano')) {
+	          if (sequence.properties.is_pano) return showsPano;
+	          return showsFlat;
+	        }
 
-	    function init() {
-	        if (svgMapillaryMapFeatures.initialized) { return; }  // run once
-	        svgMapillaryMapFeatures.enabled = false;
-	        svgMapillaryMapFeatures.initialized = true;
+	        return false;
+	      });
 	    }
 
+	    if (fromDate) {
+	      sequences = sequences.filter(function (sequence) {
+	        return new Date(sequence.properties.captured_at).getTime() >= new Date(fromDate).getTime().toString();
+	      });
+	    }
 
-	    function getService() {
-	        if (services.mapillary && !_mapillary) {
-	            _mapillary = services.mapillary;
-	            _mapillary.event.on('loadedMapFeatures', throttledRedraw);
-	        } else if (!services.mapillary && _mapillary) {
-	            _mapillary = null;
-	        }
-	        return _mapillary;
+	    if (toDate) {
+	      sequences = sequences.filter(function (sequence) {
+	        return new Date(sequence.properties.captured_at).getTime() <= new Date(toDate).getTime().toString();
+	      });
 	    }
 
+	    return sequences;
+	  }
 
-	    function showLayer() {
-	        var service = getService();
-	        if (!service) { return; }
+	  function update() {
+	    var z = ~~context.map().zoom();
+	    var showMarkers = z >= minMarkerZoom;
+	    var showViewfields = z >= minViewfieldZoom;
+	    var service = getService();
+	    var sequences = service ? service.sequences(projection) : [];
+	    var images = service && showMarkers ? service.images(projection) : [];
+	    images = filterImages(images);
+	    sequences = filterSequences(sequences);
+	    service.filterViewer(context);
+	    var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
+	      return d.properties.id;
+	    }); // exit
+
+	    traces.exit().remove(); // enter/update
+
+	    traces = traces.enter().append('path').attr('class', 'sequence').merge(traces).attr('d', svgPath(projection).geojson);
+	    var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(images, function (d) {
+	      return d.id;
+	    }); // exit
+
+	    groups.exit().remove(); // enter
+
+	    var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group').on('mouseenter', mouseover).on('mouseleave', mouseout).on('click', click);
+	    groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
+
+	    var markers = groups.merge(groupsEnter).sort(function (a, b) {
+	      return b.loc[1] - a.loc[1]; // sort Y
+	    }).attr('transform', transform).select('.viewfield-scale');
+	    markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
+	    var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
+	    viewfields.exit().remove();
+	    viewfields.enter() // viewfields may or may not be drawn...
+	    .insert('path', 'circle') // but if they are, draw below the circles
+	    .attr('class', 'viewfield').classed('pano', function () {
+	      return this.parentNode.__data__.is_pano;
+	    }).attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);
 
-	        editOn();
+	    function viewfieldPath() {
+	      if (this.parentNode.__data__.is_pano) {
+	        return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+	      } else {
+	        return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+	      }
 	    }
+	  }
 
-
-	    function hideLayer() {
-	        throttledRedraw.cancel();
+	  function drawImages(selection) {
+	    var enabled = svgMapillaryImages.enabled;
+	    var service = getService();
+	    layer = selection.selectAll('.layer-mapillary').data(service ? [0] : []);
+	    layer.exit().remove();
+	    var layerEnter = layer.enter().append('g').attr('class', 'layer-mapillary').style('display', enabled ? 'block' : 'none');
+	    layerEnter.append('g').attr('class', 'sequences');
+	    layerEnter.append('g').attr('class', 'markers');
+	    layer = layerEnter.merge(layer);
+
+	    if (enabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        update();
+	        service.loadImages(projection);
+	      } else {
 	        editOff();
+	      }
 	    }
+	  }
 
+	  drawImages.enabled = function (_) {
+	    if (!arguments.length) return svgMapillaryImages.enabled;
+	    svgMapillaryImages.enabled = _;
 
-	    function editOn() {
-	        layer.style('display', 'block');
+	    if (svgMapillaryImages.enabled) {
+	      showLayer();
+	      context.photos().on('change.mapillary_images', update);
+	    } else {
+	      hideLayer();
+	      context.photos().on('change.mapillary_images', null);
 	    }
 
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	    function editOff() {
-	        layer.selectAll('.icon-map-feature').remove();
-	        layer.style('display', 'none');
-	    }
+	  drawImages.supported = function () {
+	    return !!getService();
+	  };
 
+	  init();
+	  return drawImages;
+	}
 
-	    function click(d) {
-	        var service = getService();
-	        if (!service) { return; }
+	function svgMapillaryPosition(projection, context) {
+	  var throttledRedraw = throttle(function () {
+	    update();
+	  }, 1000);
 
-	        context.map().centerEase(d.loc);
+	  var minZoom = 12;
+	  var minViewfieldZoom = 18;
+	  var layer = select(null);
 
-	        var selectedImageKey = service.getSelectedImageKey();
-	        var imageKey;
+	  var _mapillary;
 
-	        // Pick one of the images the map feature was detected in,
-	        // preference given to an image already selected.
-	        d.detections.forEach(function(detection) {
-	            if (!imageKey || selectedImageKey === detection.image_key) {
-	                imageKey = detection.image_key;
-	            }
-	        });
+	  var viewerCompassAngle;
 
-	        service
-	            .selectImage(context, imageKey)
-	            .updateViewer(context, imageKey)
-	            .showViewer(context);
-	    }
+	  function init() {
+	    if (svgMapillaryPosition.initialized) return; // run once
 
+	    svgMapillaryPosition.initialized = true;
+	  }
 
-	    function update() {
-	        var service = getService();
-	        var data = (service ? service.mapFeatures(projection) : []);
-	        var selectedImageKey = service && service.getSelectedImageKey();
-	        var transform = svgPointTransform(projection);
-
-	        var mapFeatures = layer.selectAll('.icon-map-feature')
-	            .data(data, function(d) { return d.key; });
-
-	        // exit
-	        mapFeatures.exit()
-	            .remove();
-
-	        // enter
-	        var enter = mapFeatures.enter()
-	            .append('g')
-	            .attr('class', 'icon-map-feature icon-detected')
-	            .on('click', click);
-
-	        enter
-	            .append('title')
-	            .text(function(d) {
-	                var id = d.value.replace(/--/g, '.').replace(/-/g, '_');
-	                return _t('mapillary_map_features.' + id);
-	            });
+	  function getService() {
+	    if (services.mapillary && !_mapillary) {
+	      _mapillary = services.mapillary;
 
-	        enter
-	            .append('use')
-	            .attr('width', '24px')
-	            .attr('height', '24px')
-	            .attr('x', '-12px')
-	            .attr('y', '-12px')
-	            .attr('xlink:href', function(d) {
-	                if (d.value === 'object--billboard') {
-	                    // no billboard icon right now, so use the advertisement icon
-	                    return '#object--sign--advertisement';
-	                }
-	                return '#' + d.value;
-	            });
+	      _mapillary.event.on('imageChanged', throttledRedraw);
 
-	        enter
-	            .append('rect')
-	            .attr('width', '24px')
-	            .attr('height', '24px')
-	            .attr('x', '-12px')
-	            .attr('y', '-12px');
-
-	        // update
-	        mapFeatures
-	            .merge(enter)
-	            .attr('transform', transform)
-	            .classed('currentView', function(d) {
-	                return d.detections.some(function(detection) {
-	                    return detection.image_key === selectedImageKey;
-	                });
-	            })
-	            .sort(function(a, b) {
-	                var aSelected = a.detections.some(function(detection) {
-	                    return detection.image_key === selectedImageKey;
-	                });
-	                var bSelected = b.detections.some(function(detection) {
-	                    return detection.image_key === selectedImageKey;
-	                });
-	                if (aSelected === bSelected) {
-	                    return b.loc[1] - a.loc[1]; // sort Y
-	                } else if (aSelected) {
-	                    return 1;
-	                }
-	                return -1;
-	            });
+	      _mapillary.event.on('bearingChanged', function (e) {
+	        viewerCompassAngle = e.bearing;
+	        if (context.map().isTransformed()) return;
+	        layer.selectAll('.viewfield-group.currentView').filter(function (d) {
+	          return d.is_pano;
+	        }).attr('transform', transform);
+	      });
+	    } else if (!services.mapillary && _mapillary) {
+	      _mapillary = null;
 	    }
 
+	    return _mapillary;
+	  }
 
-	    function drawMapFeatures(selection) {
-	        var enabled = svgMapillaryMapFeatures.enabled;
-	        var service = getService();
-
-	        layer = selection.selectAll('.layer-mapillary-map-features')
-	            .data(service ? [0] : []);
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
 
-	        layer.exit()
-	            .remove();
+	  function editOff() {
+	    layer.selectAll('.viewfield-group').remove();
+	    layer.style('display', 'none');
+	  }
 
-	        layer = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-mapillary-map-features layer-mapillary-detections')
-	            .style('display', enabled ? 'block' : 'none')
-	            .merge(layer);
+	  function transform(d) {
+	    var t = svgPointTransform(projection)(d);
 
-	        if (enabled) {
-	            if (service && ~~context.map().zoom() >= minZoom) {
-	                editOn();
-	                update();
-	                service.loadMapFeatures(projection);
-	            } else {
-	                editOff();
-	            }
-	        }
+	    if (d.is_pano && viewerCompassAngle !== null && isFinite(viewerCompassAngle)) {
+	      t += ' rotate(' + Math.floor(viewerCompassAngle) + ',0,0)';
+	    } else if (d.ca) {
+	      t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
 	    }
 
+	    return t;
+	  }
 
-	    drawMapFeatures.enabled = function(_) {
-	        if (!arguments.length) { return svgMapillaryMapFeatures.enabled; }
-	        svgMapillaryMapFeatures.enabled = _;
-	        if (svgMapillaryMapFeatures.enabled) {
-	            showLayer();
-	        } else {
-	            hideLayer();
-	        }
-	        dispatch.call('change');
-	        return this;
-	    };
-
-
-	    drawMapFeatures.supported = function() {
-	        return !!getService();
-	    };
-
+	  function update() {
+	    var z = ~~context.map().zoom();
+	    var showViewfields = z >= minViewfieldZoom;
+	    var service = getService();
+	    var image = service && service.getActiveImage();
+	    var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(image ? [image] : [], function (d) {
+	      return d.id;
+	    }); // exit
 
-	    init();
-	    return drawMapFeatures;
-	}
+	    groups.exit().remove(); // enter
 
-	function svgOpenstreetcamImages(projection, context, dispatch) {
-	    var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-	    var minZoom = 12;
-	    var minMarkerZoom = 16;
-	    var minViewfieldZoom = 18;
-	    var layer = select(null);
-	    var _openstreetcam;
+	    var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group currentView highlighted');
+	    groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
 
+	    var markers = groups.merge(groupsEnter).attr('transform', transform).select('.viewfield-scale');
+	    markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
+	    var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
+	    viewfields.exit().remove();
+	    viewfields.enter().insert('path', 'circle').attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z');
+	  }
 
-	    function init() {
-	        if (svgOpenstreetcamImages.initialized) { return; }  // run once
-	        svgOpenstreetcamImages.enabled = false;
-	        svgOpenstreetcamImages.initialized = true;
+	  function drawImages(selection) {
+	    var service = getService();
+	    layer = selection.selectAll('.layer-mapillary-position').data(service ? [0] : []);
+	    layer.exit().remove();
+	    var layerEnter = layer.enter().append('g').attr('class', 'layer-mapillary-position');
+	    layerEnter.append('g').attr('class', 'markers');
+	    layer = layerEnter.merge(layer);
+
+	    if (service && ~~context.map().zoom() >= minZoom) {
+	      editOn();
+	      update();
+	    } else {
+	      editOff();
 	    }
+	  }
 
+	  drawImages.enabled = function () {
+	    update();
+	    return this;
+	  };
 
-	    function getService() {
-	        if (services.openstreetcam && !_openstreetcam) {
-	            _openstreetcam = services.openstreetcam;
-	            _openstreetcam.event.on('loadedImages', throttledRedraw);
-	        } else if (!services.openstreetcam && _openstreetcam) {
-	            _openstreetcam = null;
-	        }
+	  drawImages.supported = function () {
+	    return !!getService();
+	  };
 
-	        return _openstreetcam;
-	    }
+	  init();
+	  return drawImages;
+	}
 
+	function svgMapillarySigns(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	    function showLayer() {
-	        var service = getService();
-	        if (!service) { return; }
+	  var minZoom = 12;
+	  var layer = select(null);
 
-	        editOn();
+	  var _mapillary;
 
-	        layer
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1)
-	            .on('end', function () { dispatch.call('change'); });
-	    }
+	  function init() {
+	    if (svgMapillarySigns.initialized) return; // run once
 
+	    svgMapillarySigns.enabled = false;
+	    svgMapillarySigns.initialized = true;
+	  }
 
-	    function hideLayer() {
-	        throttledRedraw.cancel();
+	  function getService() {
+	    if (services.mapillary && !_mapillary) {
+	      _mapillary = services.mapillary;
 
-	        layer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0)
-	            .on('end', editOff);
+	      _mapillary.event.on('loadedSigns', throttledRedraw);
+	    } else if (!services.mapillary && _mapillary) {
+	      _mapillary = null;
 	    }
 
+	    return _mapillary;
+	  }
 
-	    function editOn() {
-	        layer.style('display', 'block');
-	    }
+	  function showLayer() {
+	    var service = getService();
+	    if (!service) return;
+	    service.loadSignResources(context);
+	    editOn();
+	  }
 
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    editOff();
+	  }
 
-	    function editOff() {
-	        layer.selectAll('.viewfield-group').remove();
-	        layer.style('display', 'none');
-	    }
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
 
+	  function editOff() {
+	    layer.selectAll('.icon-sign').remove();
+	    layer.style('display', 'none');
+	  }
 
-	    function click(d) {
-	        var service = getService();
-	        if (!service) { return; }
+	  function click(d3_event, d) {
+	    var service = getService();
+	    if (!service) return;
+	    context.map().centerEase(d.loc);
+	    var selectedImageId = service.getActiveImage() && service.getActiveImage().id;
+	    service.getDetections(d.id).then(function (detections) {
+	      if (detections.length) {
+	        var imageId = detections[0].image.id;
+
+	        if (imageId === selectedImageId) {
+	          service.highlightDetection(detections[0]).selectImage(context, imageId);
+	        } else {
+	          service.ensureViewerLoaded(context).then(function () {
+	            service.highlightDetection(detections[0]).selectImage(context, imageId).showViewer(context);
+	          });
+	        }
+	      }
+	    });
+	  }
 
-	        service
-	            .selectImage(context, d)
-	            .updateViewer(context, d)
-	            .showViewer(context);
+	  function filterData(detectedFeatures) {
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
 
-	        context.map().centerEase(d.loc);
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      detectedFeatures = detectedFeatures.filter(function (feature) {
+	        return new Date(feature.last_seen_at).getTime() >= fromTimestamp;
+	      });
 	    }
 
-
-	    function mouseover(d) {
-	        var service = getService();
-	        if (service) { service.setStyles(context, d); }
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      detectedFeatures = detectedFeatures.filter(function (feature) {
+	        return new Date(feature.first_seen_at).getTime() <= toTimestamp;
+	      });
 	    }
 
+	    return detectedFeatures;
+	  }
 
-	    function mouseout() {
-	        var service = getService();
-	        if (service) { service.setStyles(context, null); }
-	    }
+	  function update() {
+	    var service = getService();
+	    var data = service ? service.signs(projection) : [];
+	    data = filterData(data);
+	    var transform = svgPointTransform(projection);
+	    var signs = layer.selectAll('.icon-sign').data(data, function (d) {
+	      return d.id;
+	    }); // exit
+
+	    signs.exit().remove(); // enter
+
+	    var enter = signs.enter().append('g').attr('class', 'icon-sign icon-detected').on('click', click);
+	    enter.append('use').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px').attr('xlink:href', function (d) {
+	      return '#' + d.value;
+	    });
+	    enter.append('rect').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px'); // update
 
+	    signs.merge(enter).attr('transform', transform);
+	  }
 
-	    function transform(d) {
-	        var t = svgPointTransform(projection)(d);
-	        if (d.ca) {
-	            t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
-	        }
-	        return t;
+	  function drawSigns(selection) {
+	    var enabled = svgMapillarySigns.enabled;
+	    var service = getService();
+	    layer = selection.selectAll('.layer-mapillary-signs').data(service ? [0] : []);
+	    layer.exit().remove();
+	    layer = layer.enter().append('g').attr('class', 'layer-mapillary-signs layer-mapillary-detections').style('display', enabled ? 'block' : 'none').merge(layer);
+
+	    if (enabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        update();
+	        service.loadSigns(projection);
+	        service.showSignDetections(true);
+	      } else {
+	        editOff();
+	      }
+	    } else if (service) {
+	      service.showSignDetections(false);
 	    }
+	  }
 
+	  drawSigns.enabled = function (_) {
+	    if (!arguments.length) return svgMapillarySigns.enabled;
+	    svgMapillarySigns.enabled = _;
 
-	    context.photos().on('change.openstreetcam_images', update);
+	    if (svgMapillarySigns.enabled) {
+	      showLayer();
+	      context.photos().on('change.mapillary_signs', update);
+	    } else {
+	      hideLayer();
+	      context.photos().on('change.mapillary_signs', null);
+	    }
 
-	    function update() {
-	        var viewer = context.container().select('.photoviewer');
-	        var selected = viewer.empty() ? undefined : viewer.datum();
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	        var z = ~~context.map().zoom();
-	        var showMarkers = (z >= minMarkerZoom);
-	        var showViewfields = (z >= minViewfieldZoom);
+	  drawSigns.supported = function () {
+	    return !!getService();
+	  };
 
-	        var service = getService();
-	        var sequences = [];
-	        var images = [];
+	  init();
+	  return drawSigns;
+	}
 
-	        if (context.photos().showsFlat()) {
-	            sequences = (service ? service.sequences(projection) : []);
-	            images = (service && showMarkers ? service.images(projection) : []);
-	        }
+	function svgMapillaryMapFeatures(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	        var traces = layer.selectAll('.sequences').selectAll('.sequence')
-	            .data(sequences, function(d) { return d.properties.key; });
+	  var minZoom = 12;
+	  var layer = select(null);
 
-	        // exit
-	        traces.exit()
-	            .remove();
+	  var _mapillary;
 
-	        // enter/update
-	        traces = traces.enter()
-	            .append('path')
-	            .attr('class', 'sequence')
-	            .merge(traces)
-	            .attr('d', svgPath(projection).geojson);
+	  function init() {
+	    if (svgMapillaryMapFeatures.initialized) return; // run once
 
+	    svgMapillaryMapFeatures.enabled = false;
+	    svgMapillaryMapFeatures.initialized = true;
+	  }
 
-	        var groups = layer.selectAll('.markers').selectAll('.viewfield-group')
-	            .data(images, function(d) { return d.key; });
+	  function getService() {
+	    if (services.mapillary && !_mapillary) {
+	      _mapillary = services.mapillary;
 
-	        // exit
-	        groups.exit()
-	            .remove();
+	      _mapillary.event.on('loadedMapFeatures', throttledRedraw);
+	    } else if (!services.mapillary && _mapillary) {
+	      _mapillary = null;
+	    }
 
-	        // enter
-	        var groupsEnter = groups.enter()
-	            .append('g')
-	            .attr('class', 'viewfield-group')
-	            .on('mouseenter', mouseover)
-	            .on('mouseleave', mouseout)
-	            .on('click', click);
+	    return _mapillary;
+	  }
 
-	        groupsEnter
-	            .append('g')
-	            .attr('class', 'viewfield-scale');
+	  function showLayer() {
+	    var service = getService();
+	    if (!service) return;
+	    service.loadObjectResources(context);
+	    editOn();
+	  }
 
-	        // update
-	        var markers = groups
-	            .merge(groupsEnter)
-	            .sort(function(a, b) {
-	                return (a === selected) ? 1
-	                    : (b === selected) ? -1
-	                    : b.loc[1] - a.loc[1];  // sort Y
-	            })
-	            .attr('transform', transform)
-	            .select('.viewfield-scale');
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    editOff();
+	  }
 
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
 
-	        markers.selectAll('circle')
-	            .data([0])
-	            .enter()
-	            .append('circle')
-	            .attr('dx', '0')
-	            .attr('dy', '0')
-	            .attr('r', '6');
+	  function editOff() {
+	    layer.selectAll('.icon-map-feature').remove();
+	    layer.style('display', 'none');
+	  }
 
-	        var viewfields = markers.selectAll('.viewfield')
-	            .data(showViewfields ? [0] : []);
+	  function click(d3_event, d) {
+	    var service = getService();
+	    if (!service) return;
+	    context.map().centerEase(d.loc);
+	    var selectedImageId = service.getActiveImage() && service.getActiveImage().id;
+	    service.getDetections(d.id).then(function (detections) {
+	      if (detections.length) {
+	        var imageId = detections[0].image.id;
+
+	        if (imageId === selectedImageId) {
+	          service.highlightDetection(detections[0]).selectImage(context, imageId);
+	        } else {
+	          service.ensureViewerLoaded(context).then(function () {
+	            service.highlightDetection(detections[0]).selectImage(context, imageId).showViewer(context);
+	          });
+	        }
+	      }
+	    });
+	  }
 
-	        viewfields.exit()
-	            .remove();
+	  function filterData(detectedFeatures) {
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
 
-	        viewfields.enter()               // viewfields may or may not be drawn...
-	            .insert('path', 'circle')    // but if they are, draw below the circles
-	            .attr('class', 'viewfield')
-	            .attr('transform', 'scale(1.5,1.5),translate(-8, -13)')
-	            .attr('d', 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z');
+	    if (fromDate) {
+	      detectedFeatures = detectedFeatures.filter(function (feature) {
+	        return new Date(feature.last_seen_at).getTime() >= new Date(fromDate).getTime();
+	      });
 	    }
 
+	    if (toDate) {
+	      detectedFeatures = detectedFeatures.filter(function (feature) {
+	        return new Date(feature.first_seen_at).getTime() <= new Date(toDate).getTime();
+	      });
+	    }
 
-	    function drawImages(selection) {
-	        var enabled = svgOpenstreetcamImages.enabled,
-	            service = getService();
-
-	        layer = selection.selectAll('.layer-openstreetcam')
-	            .data(service ? [0] : []);
-
-	        layer.exit()
-	            .remove();
+	    return detectedFeatures;
+	  }
 
-	        var layerEnter = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-openstreetcam')
-	            .style('display', enabled ? 'block' : 'none');
+	  function update() {
+	    var service = getService();
+	    var data = service ? service.mapFeatures(projection) : [];
+	    data = filterData(data);
+	    var transform = svgPointTransform(projection);
+	    var mapFeatures = layer.selectAll('.icon-map-feature').data(data, function (d) {
+	      return d.id;
+	    }); // exit
+
+	    mapFeatures.exit().remove(); // enter
+
+	    var enter = mapFeatures.enter().append('g').attr('class', 'icon-map-feature icon-detected').on('click', click);
+	    enter.append('title').text(function (d) {
+	      var id = d.value.replace(/--/g, '.').replace(/-/g, '_');
+	      return _t('mapillary_map_features.' + id);
+	    });
+	    enter.append('use').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px').attr('xlink:href', function (d) {
+	      if (d.value === 'object--billboard') {
+	        // no billboard icon right now, so use the advertisement icon
+	        return '#object--sign--advertisement';
+	      }
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'sequences');
+	      return '#' + d.value;
+	    });
+	    enter.append('rect').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px'); // update
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'markers');
+	    mapFeatures.merge(enter).attr('transform', transform);
+	  }
 
-	        layer = layerEnter
-	            .merge(layer);
+	  function drawMapFeatures(selection) {
+	    var enabled = svgMapillaryMapFeatures.enabled;
+	    var service = getService();
+	    layer = selection.selectAll('.layer-mapillary-map-features').data(service ? [0] : []);
+	    layer.exit().remove();
+	    layer = layer.enter().append('g').attr('class', 'layer-mapillary-map-features layer-mapillary-detections').style('display', enabled ? 'block' : 'none').merge(layer);
 
-	        if (enabled) {
-	            if (service && ~~context.map().zoom() >= minZoom) {
-	                editOn();
-	                update();
-	                service.loadImages(projection);
-	            } else {
-	                editOff();
-	            }
-	        }
+	    if (enabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        update();
+	        service.loadMapFeatures(projection);
+	        service.showFeatureDetections(true);
+	      } else {
+	        editOff();
+	      }
+	    } else if (service) {
+	      service.showFeatureDetections(false);
 	    }
+	  }
 
+	  drawMapFeatures.enabled = function (_) {
+	    if (!arguments.length) return svgMapillaryMapFeatures.enabled;
+	    svgMapillaryMapFeatures.enabled = _;
 
-	    drawImages.enabled = function(_) {
-	        if (!arguments.length) { return svgOpenstreetcamImages.enabled; }
-	        svgOpenstreetcamImages.enabled = _;
-	        if (svgOpenstreetcamImages.enabled) {
-	            showLayer();
-	        } else {
-	            hideLayer();
-	        }
-	        dispatch.call('change');
-	        return this;
-	    };
-
+	    if (svgMapillaryMapFeatures.enabled) {
+	      showLayer();
+	      context.photos().on('change.mapillary_map_features', update);
+	    } else {
+	      hideLayer();
+	      context.photos().on('change.mapillary_map_features', null);
+	    }
 
-	    drawImages.supported = function() {
-	        return !!getService();
-	    };
+	    dispatch.call('change');
+	    return this;
+	  };
 
+	  drawMapFeatures.supported = function () {
+	    return !!getService();
+	  };
 
-	    init();
-	    return drawImages;
+	  init();
+	  return drawMapFeatures;
 	}
 
-	function svgOsm(projection, context, dispatch) {
-	    var enabled = true;
-
-
-	    function drawOsm(selection) {
-	        selection.selectAll('.layer-osm')
-	            .data(['covered', 'areas', 'lines', 'points', 'labels'])
-	            .enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'layer-osm ' + d; });
-
-	        selection.selectAll('.layer-osm.points').selectAll('.points-group')
-	            .data(['points', 'midpoints', 'vertices', 'turns'])
-	            .enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'points-group ' + d; });
-	    }
+	function svgOpenstreetcamImages(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
+	  var minZoom = 12;
+	  var minMarkerZoom = 16;
+	  var minViewfieldZoom = 18;
+	  var layer = select(null);
 
-	    function showLayer() {
-	        var layer = context.surface().selectAll('.data-layer.osm');
-	        layer.interrupt();
+	  var _openstreetcam;
 
-	        layer
-	            .classed('disabled', false)
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1)
-	            .on('end interrupt', function () {
-	                dispatch.call('change');
-	            });
-	    }
+	  function init() {
+	    if (svgOpenstreetcamImages.initialized) return; // run once
 
+	    svgOpenstreetcamImages.enabled = false;
+	    svgOpenstreetcamImages.initialized = true;
+	  }
 
-	    function hideLayer() {
-	        var layer = context.surface().selectAll('.data-layer.osm');
-	        layer.interrupt();
+	  function getService() {
+	    if (services.openstreetcam && !_openstreetcam) {
+	      _openstreetcam = services.openstreetcam;
 
-	        layer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0)
-	            .on('end interrupt', function () {
-	                layer.classed('disabled', true);
-	                dispatch.call('change');
-	            });
+	      _openstreetcam.event.on('loadedImages', throttledRedraw);
+	    } else if (!services.openstreetcam && _openstreetcam) {
+	      _openstreetcam = null;
 	    }
 
+	    return _openstreetcam;
+	  }
 
-	    drawOsm.enabled = function(val) {
-	        if (!arguments.length) { return enabled; }
-	        enabled = val;
-
-	        if (enabled) {
-	            showLayer();
-	        } else {
-	            hideLayer();
-	        }
+	  function showLayer() {
+	    var service = getService();
+	    if (!service) return;
+	    editOn();
+	    layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
+	      dispatch.call('change');
+	    });
+	  }
 
-	        dispatch.call('change');
-	        return this;
-	    };
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    layer.transition().duration(250).style('opacity', 0).on('end', editOff);
+	  }
 
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
 
-	    return drawOsm;
-	}
+	  function editOff() {
+	    layer.selectAll('.viewfield-group').remove();
+	    layer.style('display', 'none');
+	  }
 
-	var _notesEnabled = false;
-	var _osmService;
+	  function click(d3_event, d) {
+	    var service = getService();
+	    if (!service) return;
+	    service.ensureViewerLoaded(context).then(function () {
+	      service.selectImage(context, d.key).showViewer(context);
+	    });
+	    context.map().centerEase(d.loc);
+	  }
 
+	  function mouseover(d3_event, d) {
+	    var service = getService();
+	    if (service) service.setStyles(context, d);
+	  }
 
-	function svgNotes(projection, context, dispatch$1) {
-	    if (!dispatch$1) { dispatch$1 = dispatch('change'); }
-	    var throttledRedraw = throttle(function () { dispatch$1.call('change'); }, 1000);
-	    var minZoom = 12;
-	    var touchLayer = select(null);
-	    var drawLayer = select(null);
-	    var _notesVisible = false;
+	  function mouseout() {
+	    var service = getService();
+	    if (service) service.setStyles(context, null);
+	  }
 
+	  function transform(d) {
+	    var t = svgPointTransform(projection)(d);
 
-	    function markerPath(selection, klass) {
-	        selection
-	            .attr('class', klass)
-	            .attr('transform', 'translate(-8, -22)')
-	            .attr('d', 'm17.5,0l-15,0c-1.37,0 -2.5,1.12 -2.5,2.5l0,11.25c0,1.37 1.12,2.5 2.5,2.5l3.75,0l0,3.28c0,0.38 0.43,0.6 0.75,0.37l4.87,-3.65l5.62,0c1.37,0 2.5,-1.12 2.5,-2.5l0,-11.25c0,-1.37 -1.12,-2.5 -2.5,-2.5z');
+	    if (d.ca) {
+	      t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
 	    }
 
+	    return t;
+	  }
 
-	    // Loosely-coupled osm service for fetching notes.
-	    function getService() {
-	        if (services.osm && !_osmService) {
-	            _osmService = services.osm;
-	            _osmService.on('loadedNotes', throttledRedraw);
-	        } else if (!services.osm && _osmService) {
-	            _osmService = null;
-	        }
+	  function filterImages(images) {
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
+	    var usernames = context.photos().usernames();
 
-	        return _osmService;
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      images = images.filter(function (item) {
+	        return new Date(item.captured_at).getTime() >= fromTimestamp;
+	      });
 	    }
 
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      images = images.filter(function (item) {
+	        return new Date(item.captured_at).getTime() <= toTimestamp;
+	      });
+	    }
 
-	    // Show the notes
-	    function editOn() {
-	        if (!_notesVisible) {
-	            _notesVisible = true;
-	            drawLayer
-	                .style('display', 'block');
-	        }
+	    if (usernames) {
+	      images = images.filter(function (item) {
+	        return usernames.indexOf(item.captured_by) !== -1;
+	      });
 	    }
 
+	    return images;
+	  }
+
+	  function filterSequences(sequences) {
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
+	    var usernames = context.photos().usernames();
 
-	    // Immediately remove the notes and their touch targets
-	    function editOff() {
-	        if (_notesVisible) {
-	            _notesVisible = false;
-	            drawLayer
-	                .style('display', 'none');
-	            drawLayer.selectAll('.note')
-	                .remove();
-	            touchLayer.selectAll('.note')
-	                .remove();
-	        }
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      sequences = sequences.filter(function (image) {
+	        return new Date(image.properties.captured_at).getTime() >= fromTimestamp;
+	      });
 	    }
 
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      sequences = sequences.filter(function (image) {
+	        return new Date(image.properties.captured_at).getTime() <= toTimestamp;
+	      });
+	    }
 
-	    // Enable the layer.  This shows the notes and transitions them to visible.
-	    function layerOn() {
-	        editOn();
-
-	        drawLayer
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1)
-	            .on('end interrupt', function () {
-	                dispatch$1.call('change');
-	            });
+	    if (usernames) {
+	      sequences = sequences.filter(function (image) {
+	        return usernames.indexOf(image.properties.captured_by) !== -1;
+	      });
 	    }
 
+	    return sequences;
+	  }
 
-	    // Disable the layer.  This transitions the layer invisible and then hides the notes.
-	    function layerOff() {
-	        throttledRedraw.cancel();
-	        drawLayer.interrupt();
-	        touchLayer.selectAll('.note')
-	            .remove();
+	  function update() {
+	    var viewer = context.container().select('.photoviewer');
+	    var selected = viewer.empty() ? undefined : viewer.datum();
+	    var z = ~~context.map().zoom();
+	    var showMarkers = z >= minMarkerZoom;
+	    var showViewfields = z >= minViewfieldZoom;
+	    var service = getService();
+	    var sequences = [];
+	    var images = [];
 
-	        drawLayer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0)
-	            .on('end interrupt', function () {
-	                editOff();
-	                dispatch$1.call('change');
-	            });
+	    if (context.photos().showsFlat()) {
+	      sequences = service ? service.sequences(projection) : [];
+	      images = service && showMarkers ? service.images(projection) : [];
+	      sequences = filterSequences(sequences);
+	      images = filterImages(images);
 	    }
 
+	    var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
+	      return d.properties.key;
+	    }); // exit
 
-	    // Update the note markers
-	    function updateMarkers() {
-	        if (!_notesVisible || !_notesEnabled) { return; }
-
-	        var service = getService();
-	        var selectedID = context.selectedNoteID();
-	        var data = (service ? service.notes(projection) : []);
-	        var getTransform = svgPointTransform(projection);
-
-	        // Draw markers..
-	        var notes = drawLayer.selectAll('.note')
-	            .data(data, function(d) { return d.status + d.id; });
-
-	        // exit
-	        notes.exit()
-	            .remove();
-
-	        // enter
-	        var notesEnter = notes.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'note note-' + d.id + ' ' + d.status; })
-	            .classed('new', function(d) { return d.id < 0; });
-
-	        notesEnter
-	            .append('ellipse')
-	            .attr('cx', 0.5)
-	            .attr('cy', 1)
-	            .attr('rx', 6.5)
-	            .attr('ry', 3)
-	            .attr('class', 'stroke');
-
-	        notesEnter
-	            .append('path')
-	            .call(markerPath, 'shadow');
-
-	        notesEnter
-	            .append('use')
-	            .attr('class', 'note-fill')
-	            .attr('width', '20px')
-	            .attr('height', '20px')
-	            .attr('x', '-8px')
-	            .attr('y', '-22px')
-	            .attr('xlink:href', '#iD-icon-note');
-
-	        notesEnter.selectAll('.icon-annotation')
-	            .data(function(d) { return [d]; })
-	            .enter()
-	            .append('use')
-	            .attr('class', 'icon-annotation')
-	            .attr('width', '10px')
-	            .attr('height', '10px')
-	            .attr('x', '-3px')
-	            .attr('y', '-19px')
-	            .attr('xlink:href', function(d) {
-	                return '#iD-icon-' + (d.id < 0 ? 'plus' : (d.status === 'open' ? 'close' : 'apply'));
-	            });
+	    traces.exit().remove(); // enter/update
 
-	        // update
-	        notes
-	            .merge(notesEnter)
-	            .sort(sortY)
-	            .classed('selected', function(d) {
-	                var mode = context.mode();
-	                var isMoving = mode && mode.id === 'drag-note';  // no shadows when dragging
-	                return !isMoving && d.id === selectedID;
-	            })
-	            .attr('transform', getTransform);
+	    traces = traces.enter().append('path').attr('class', 'sequence').merge(traces).attr('d', svgPath(projection).geojson);
+	    var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(images, function (d) {
+	      return d.key;
+	    }); // exit
 
+	    groups.exit().remove(); // enter
 
-	        // Draw targets..
-	        if (touchLayer.empty()) { return; }
-	        var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group').on('mouseenter', mouseover).on('mouseleave', mouseout).on('click', click);
+	    groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
 
-	        var targets = touchLayer.selectAll('.note')
-	            .data(data, function(d) { return d.id; });
+	    var markers = groups.merge(groupsEnter).sort(function (a, b) {
+	      return a === selected ? 1 : b === selected ? -1 : b.loc[1] - a.loc[1]; // sort Y
+	    }).attr('transform', transform).select('.viewfield-scale');
+	    markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
+	    var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
+	    viewfields.exit().remove();
+	    viewfields.enter() // viewfields may or may not be drawn...
+	    .insert('path', 'circle') // but if they are, draw below the circles
+	    .attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z');
+	  }
 
-	        // exit
-	        targets.exit()
-	            .remove();
+	  function drawImages(selection) {
+	    var enabled = svgOpenstreetcamImages.enabled,
+	        service = getService();
+	    layer = selection.selectAll('.layer-openstreetcam').data(service ? [0] : []);
+	    layer.exit().remove();
+	    var layerEnter = layer.enter().append('g').attr('class', 'layer-openstreetcam').style('display', enabled ? 'block' : 'none');
+	    layerEnter.append('g').attr('class', 'sequences');
+	    layerEnter.append('g').attr('class', 'markers');
+	    layer = layerEnter.merge(layer);
 
-	        // enter/update
-	        targets.enter()
-	            .append('rect')
-	            .attr('width', '20px')
-	            .attr('height', '20px')
-	            .attr('x', '-8px')
-	            .attr('y', '-22px')
-	            .merge(targets)
-	            .sort(sortY)
-	            .attr('class', function(d) {
-	                var newClass = (d.id < 0 ? 'new' : '');
-	                return 'note target note-' + d.id + ' ' + fillClass + newClass;
-	            })
-	            .attr('transform', getTransform);
+	    if (enabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        update();
+	        service.loadImages(projection);
+	      } else {
+	        editOff();
+	      }
+	    }
+	  }
 
+	  drawImages.enabled = function (_) {
+	    if (!arguments.length) return svgOpenstreetcamImages.enabled;
+	    svgOpenstreetcamImages.enabled = _;
 
-	        function sortY(a, b) {
-	            return (a.id === selectedID) ? 1 : (b.id === selectedID) ? -1 : b.loc[1] - a.loc[1];
-	        }
+	    if (svgOpenstreetcamImages.enabled) {
+	      showLayer();
+	      context.photos().on('change.openstreetcam_images', update);
+	    } else {
+	      hideLayer();
+	      context.photos().on('change.openstreetcam_images', null);
 	    }
 
+	    dispatch.call('change');
+	    return this;
+	  };
+
+	  drawImages.supported = function () {
+	    return !!getService();
+	  };
+
+	  init();
+	  return drawImages;
+	}
 
-	    // Draw the notes layer and schedule loading notes and updating markers.
-	    function drawNotes(selection) {
-	        var service = getService();
+	function svgOsm(projection, context, dispatch) {
+	  var enabled = true;
 
-	        var surface = context.surface();
-	        if (surface && !surface.empty()) {
-	            touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
-	        }
+	  function drawOsm(selection) {
+	    selection.selectAll('.layer-osm').data(['covered', 'areas', 'lines', 'points', 'labels']).enter().append('g').attr('class', function (d) {
+	      return 'layer-osm ' + d;
+	    });
+	    selection.selectAll('.layer-osm.points').selectAll('.points-group').data(['points', 'midpoints', 'vertices', 'turns']).enter().append('g').attr('class', function (d) {
+	      return 'points-group ' + d;
+	    });
+	  }
 
-	        drawLayer = selection.selectAll('.layer-notes')
-	            .data(service ? [0] : []);
+	  function showLayer() {
+	    var layer = context.surface().selectAll('.data-layer.osm');
+	    layer.interrupt();
+	    layer.classed('disabled', false).style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
+	      dispatch.call('change');
+	    });
+	  }
 
-	        drawLayer.exit()
-	            .remove();
+	  function hideLayer() {
+	    var layer = context.surface().selectAll('.data-layer.osm');
+	    layer.interrupt();
+	    layer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+	      layer.classed('disabled', true);
+	      dispatch.call('change');
+	    });
+	  }
 
-	        drawLayer = drawLayer.enter()
-	            .append('g')
-	            .attr('class', 'layer-notes')
-	            .style('display', _notesEnabled ? 'block' : 'none')
-	            .merge(drawLayer);
+	  drawOsm.enabled = function (val) {
+	    if (!arguments.length) return enabled;
+	    enabled = val;
 
-	        if (_notesEnabled) {
-	            if (service && ~~context.map().zoom() >= minZoom) {
-	                editOn();
-	                service.loadNotes(projection);
-	                updateMarkers();
-	            } else {
-	                editOff();
-	            }
-	        }
+	    if (enabled) {
+	      showLayer();
+	    } else {
+	      hideLayer();
 	    }
 
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	    // Toggles the layer on and off
-	    drawNotes.enabled = function(val) {
-	        if (!arguments.length) { return _notesEnabled; }
+	  return drawOsm;
+	}
 
-	        _notesEnabled = val;
-	        if (_notesEnabled) {
-	            layerOn();
-	        } else {
-	            layerOff();
-	            if (context.selectedNoteID()) {
-	                context.enter(modeBrowse(context));
-	            }
-	        }
+	var _notesEnabled = false;
 
-	        dispatch$1.call('change');
-	        return this;
-	    };
+	var _osmService;
 
+	function svgNotes(projection, context, dispatch) {
+	  if (!dispatch) {
+	    dispatch = dispatch$8('change');
+	  }
 
-	    return drawNotes;
-	}
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	function svgTouch() {
+	  var minZoom = 12;
+	  var touchLayer = select(null);
+	  var drawLayer = select(null);
+	  var _notesVisible = false;
 
-	    function drawTouch(selection) {
-	        selection.selectAll('.layer-touch')
-	            .data(['areas', 'lines', 'points', 'turns', 'markers'])
-	            .enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'layer-touch ' + d; });
-	    }
+	  function markerPath(selection, klass) {
+	    selection.attr('class', klass).attr('transform', 'translate(-8, -22)').attr('d', 'm17.5,0l-15,0c-1.37,0 -2.5,1.12 -2.5,2.5l0,11.25c0,1.37 1.12,2.5 2.5,2.5l3.75,0l0,3.28c0,0.38 0.43,0.6 0.75,0.37l4.87,-3.65l5.62,0c1.37,0 2.5,-1.12 2.5,-2.5l0,-11.25c0,-1.37 -1.12,-2.5 -2.5,-2.5z');
+	  } // Loosely-coupled osm service for fetching notes.
 
-	    return drawTouch;
-	}
 
-	function refresh(selection, node) {
-	    var cr = node.getBoundingClientRect();
-	    var prop = [cr.width, cr.height];
-	    selection.property('__dimensions__', prop);
-	    return prop;
-	}
+	  function getService() {
+	    if (services.osm && !_osmService) {
+	      _osmService = services.osm;
 
-	function utilGetDimensions(selection, force) {
-	    if (!selection || selection.empty()) {
-	        return [0, 0];
+	      _osmService.on('loadedNotes', throttledRedraw);
+	    } else if (!services.osm && _osmService) {
+	      _osmService = null;
 	    }
-	    var node = selection.node(),
-	        cached = selection.property('__dimensions__');
-	    return (!cached || force) ? refresh(selection, node) : cached;
-	}
 
+	    return _osmService;
+	  } // Show the notes
 
-	function utilSetDimensions(selection, dimensions) {
-	    if (!selection || selection.empty()) {
-	        return selection;
+
+	  function editOn() {
+	    if (!_notesVisible) {
+	      _notesVisible = true;
+	      drawLayer.style('display', 'block');
 	    }
-	    var node = selection.node();
-	    if (dimensions === null) {
-	        refresh(selection, node);
-	        return selection;
+	  } // Immediately remove the notes and their touch targets
+
+
+	  function editOff() {
+	    if (_notesVisible) {
+	      _notesVisible = false;
+	      drawLayer.style('display', 'none');
+	      drawLayer.selectAll('.note').remove();
+	      touchLayer.selectAll('.note').remove();
 	    }
-	    return selection
-	        .property('__dimensions__', [dimensions[0], dimensions[1]])
-	        .attr('width', dimensions[0])
-	        .attr('height', dimensions[1]);
-	}
+	  } // Enable the layer.  This shows the notes and transitions them to visible.
 
-	function svgLayers(projection, context) {
-	    var dispatch$1 = dispatch('change');
-	    var svg = select(null);
-	    var _layers = [
-	        { id: 'osm', layer: svgOsm(projection, context, dispatch$1) },
-	        { id: 'notes', layer: svgNotes(projection, context, dispatch$1) },
-	        { id: 'data', layer: svgData(projection, context, dispatch$1) },
-	        { id: 'keepRight', layer: svgKeepRight(projection, context, dispatch$1) },
-	        { id: 'improveOSM', layer: svgImproveOSM(projection, context, dispatch$1) },
-	        { id: 'osmose', layer: svgOsmose(projection, context, dispatch$1) },
-	        { id: 'streetside', layer: svgStreetside(projection, context, dispatch$1)},
-	        { id: 'mapillary', layer: svgMapillaryImages(projection, context, dispatch$1) },
-	        { id: 'mapillary-map-features',  layer: svgMapillaryMapFeatures(projection, context, dispatch$1) },
-	        { id: 'mapillary-signs',  layer: svgMapillarySigns(projection, context, dispatch$1) },
-	        { id: 'openstreetcam', layer: svgOpenstreetcamImages(projection, context, dispatch$1) },
-	        { id: 'debug', layer: svgDebug(projection, context) },
-	        { id: 'geolocate', layer: svgGeolocate(projection) },
-	        { id: 'touch', layer: svgTouch() }
-	    ];
 
+	  function layerOn() {
+	    editOn();
+	    drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
+	      dispatch.call('change');
+	    });
+	  } // Disable the layer.  This transitions the layer invisible and then hides the notes.
 
-	    function drawLayers(selection) {
-	        svg = selection.selectAll('.surface')
-	            .data([0]);
 
-	        svg = svg.enter()
-	            .append('svg')
-	            .attr('class', 'surface')
-	            .merge(svg);
+	  function layerOff() {
+	    throttledRedraw.cancel();
+	    drawLayer.interrupt();
+	    touchLayer.selectAll('.note').remove();
+	    drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+	      editOff();
+	      dispatch.call('change');
+	    });
+	  } // Update the note markers
 
-	        var defs = svg.selectAll('.surface-defs')
-	            .data([0]);
 
-	        defs.enter()
-	            .append('defs')
-	            .attr('class', 'surface-defs');
+	  function updateMarkers() {
+	    if (!_notesVisible || !_notesEnabled) return;
+	    var service = getService();
+	    var selectedID = context.selectedNoteID();
+	    var data = service ? service.notes(projection) : [];
+	    var getTransform = svgPointTransform(projection); // Draw markers..
 
-	        var groups = svg.selectAll('.data-layer')
-	            .data(_layers);
+	    var notes = drawLayer.selectAll('.note').data(data, function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
-	        groups.exit()
-	            .remove();
+	    notes.exit().remove(); // enter
 
-	        groups.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'data-layer ' + d.id; })
-	            .merge(groups)
-	            .each(function(d) { select(this).call(d.layer); });
-	    }
+	    var notesEnter = notes.enter().append('g').attr('class', function (d) {
+	      return 'note note-' + d.id + ' ' + d.status;
+	    }).classed('new', function (d) {
+	      return d.id < 0;
+	    });
+	    notesEnter.append('ellipse').attr('cx', 0.5).attr('cy', 1).attr('rx', 6.5).attr('ry', 3).attr('class', 'stroke');
+	    notesEnter.append('path').call(markerPath, 'shadow');
+	    notesEnter.append('use').attr('class', 'note-fill').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').attr('xlink:href', '#iD-icon-note');
+	    notesEnter.selectAll('.icon-annotation').data(function (d) {
+	      return [d];
+	    }).enter().append('use').attr('class', 'icon-annotation').attr('width', '10px').attr('height', '10px').attr('x', '-3px').attr('y', '-19px').attr('xlink:href', function (d) {
+	      if (d.id < 0) return '#iD-icon-plus';
+	      if (d.status === 'open') return '#iD-icon-close';
+	      return '#iD-icon-apply';
+	    }); // update
+
+	    notes.merge(notesEnter).sort(sortY).classed('selected', function (d) {
+	      var mode = context.mode();
+	      var isMoving = mode && mode.id === 'drag-note'; // no shadows when dragging
+
+	      return !isMoving && d.id === selectedID;
+	    }).attr('transform', getTransform); // Draw targets..
+
+	    if (touchLayer.empty()) return;
+	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var targets = touchLayer.selectAll('.note').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
+	    targets.exit().remove(); // enter/update
 
-	    drawLayers.all = function() {
-	        return _layers;
-	    };
+	    targets.enter().append('rect').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').merge(targets).sort(sortY).attr('class', function (d) {
+	      var newClass = d.id < 0 ? 'new' : '';
+	      return 'note target note-' + d.id + ' ' + fillClass + newClass;
+	    }).attr('transform', getTransform);
 
+	    function sortY(a, b) {
+	      if (a.id === selectedID) return 1;
+	      if (b.id === selectedID) return -1;
+	      return b.loc[1] - a.loc[1];
+	    }
+	  } // Draw the notes layer and schedule loading notes and updating markers.
 
-	    drawLayers.layer = function(id) {
-	        var obj = _layers.find(function(o) { return o.id === id; });
-	        return obj && obj.layer;
-	    };
 
+	  function drawNotes(selection) {
+	    var service = getService();
+	    var surface = context.surface();
 
-	    drawLayers.only = function(what) {
-	        var arr = [].concat(what);
-	        var all = _layers.map(function(layer) { return layer.id; });
-	        return drawLayers.remove(utilArrayDifference(all, arr));
-	    };
+	    if (surface && !surface.empty()) {
+	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+	    }
 
+	    drawLayer = selection.selectAll('.layer-notes').data(service ? [0] : []);
+	    drawLayer.exit().remove();
+	    drawLayer = drawLayer.enter().append('g').attr('class', 'layer-notes').style('display', _notesEnabled ? 'block' : 'none').merge(drawLayer);
 
-	    drawLayers.remove = function(what) {
-	        var arr = [].concat(what);
-	        arr.forEach(function(id) {
-	            _layers = _layers.filter(function(o) { return o.id !== id; });
-	        });
-	        dispatch$1.call('change');
-	        return this;
-	    };
+	    if (_notesEnabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        service.loadNotes(projection);
+	        updateMarkers();
+	      } else {
+	        editOff();
+	      }
+	    }
+	  } // Toggles the layer on and off
 
 
-	    drawLayers.add = function(what) {
-	        var arr = [].concat(what);
-	        arr.forEach(function(obj) {
-	            if ('id' in obj && 'layer' in obj) {
-	                _layers.push(obj);
-	            }
-	        });
-	        dispatch$1.call('change');
-	        return this;
-	    };
+	  drawNotes.enabled = function (val) {
+	    if (!arguments.length) return _notesEnabled;
+	    _notesEnabled = val;
 
+	    if (_notesEnabled) {
+	      layerOn();
+	    } else {
+	      layerOff();
 
-	    drawLayers.dimensions = function(val) {
-	        if (!arguments.length) { return utilGetDimensions(svg); }
-	        utilSetDimensions(svg, val);
-	        return this;
-	    };
+	      if (context.selectedNoteID()) {
+	        context.enter(modeBrowse(context));
+	      }
+	    }
 
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	    return utilRebind(drawLayers, dispatch$1, 'on');
+	  return drawNotes;
 	}
 
-	function svgLines(projection, context) {
-	    var detected = utilDetect();
-
-	    var highway_stack = {
-	        motorway: 0,
-	        motorway_link: 1,
-	        trunk: 2,
-	        trunk_link: 3,
-	        primary: 4,
-	        primary_link: 5,
-	        secondary: 6,
-	        tertiary: 7,
-	        unclassified: 8,
-	        residential: 9,
-	        service: 10,
-	        footway: 11
-	    };
+	function svgTouch() {
+	  function drawTouch(selection) {
+	    selection.selectAll('.layer-touch').data(['areas', 'lines', 'points', 'turns', 'markers']).enter().append('g').attr('class', function (d) {
+	      return 'layer-touch ' + d;
+	    });
+	  }
 
+	  return drawTouch;
+	}
 
-	    function drawTargets(selection, graph, entities, filter) {
-	        var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-	        var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
-	        var getPath = svgPath(projection).geojson;
-	        var activeID = context.activeID();
-	        var base = context.history().base();
+	function refresh(selection, node) {
+	  var cr = node.getBoundingClientRect();
+	  var prop = [cr.width, cr.height];
+	  selection.property('__dimensions__', prop);
+	  return prop;
+	}
 
-	        // The targets and nopes will be MultiLineString sub-segments of the ways
-	        var data = { targets: [], nopes: [] };
+	function utilGetDimensions(selection, force) {
+	  if (!selection || selection.empty()) {
+	    return [0, 0];
+	  }
 
-	        entities.forEach(function(way) {
-	            var features = svgSegmentWay(way, graph, activeID);
-	            data.targets.push.apply(data.targets, features.passive);
-	            data.nopes.push.apply(data.nopes, features.active);
-	        });
+	  var node = selection.node(),
+	      cached = selection.property('__dimensions__');
+	  return !cached || force ? refresh(selection, node) : cached;
+	}
+	function utilSetDimensions(selection, dimensions) {
+	  if (!selection || selection.empty()) {
+	    return selection;
+	  }
 
+	  var node = selection.node();
 
-	        // Targets allow hover and vertex snapping
-	        var targetData = data.targets.filter(getPath);
-	        var targets = selection.selectAll('.line.target-allowed')
-	            .filter(function(d) { return filter(d.properties.entity); })
-	            .data(targetData, function key(d) { return d.id; });
+	  if (dimensions === null) {
+	    refresh(selection, node);
+	    return selection;
+	  }
 
-	        // exit
-	        targets.exit()
-	            .remove();
+	  return selection.property('__dimensions__', [dimensions[0], dimensions[1]]).attr('width', dimensions[0]).attr('height', dimensions[1]);
+	}
 
-	        var segmentWasEdited = function(d) {
-	            var wayID = d.properties.entity.id;
-	            // if the whole line was edited, don't draw segment changes
-	            if (!base.entities[wayID] ||
-	                !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
-	                return false;
-	            }
-	            return d.properties.nodes.some(function(n) {
-	                return !base.entities[n.id] ||
-	                       !fastDeepEqual(graph.entities[n.id].loc, base.entities[n.id].loc);
-	            });
-	        };
+	function svgLayers(projection, context) {
+	  var dispatch = dispatch$8('change');
+	  var svg = select(null);
+	  var _layers = [{
+	    id: 'osm',
+	    layer: svgOsm(projection, context, dispatch)
+	  }, {
+	    id: 'notes',
+	    layer: svgNotes(projection, context, dispatch)
+	  }, {
+	    id: 'data',
+	    layer: svgData(projection, context, dispatch)
+	  }, {
+	    id: 'keepRight',
+	    layer: svgKeepRight(projection, context, dispatch)
+	  }, {
+	    id: 'improveOSM',
+	    layer: svgImproveOSM(projection, context, dispatch)
+	  }, {
+	    id: 'osmose',
+	    layer: svgOsmose(projection, context, dispatch)
+	  }, {
+	    id: 'streetside',
+	    layer: svgStreetside(projection, context, dispatch)
+	  }, {
+	    id: 'mapillary',
+	    layer: svgMapillaryImages(projection, context, dispatch)
+	  }, {
+	    id: 'mapillary-position',
+	    layer: svgMapillaryPosition(projection, context)
+	  }, {
+	    id: 'mapillary-map-features',
+	    layer: svgMapillaryMapFeatures(projection, context, dispatch)
+	  }, {
+	    id: 'mapillary-signs',
+	    layer: svgMapillarySigns(projection, context, dispatch)
+	  }, {
+	    id: 'openstreetcam',
+	    layer: svgOpenstreetcamImages(projection, context, dispatch)
+	  }, {
+	    id: 'debug',
+	    layer: svgDebug(projection, context)
+	  }, {
+	    id: 'geolocate',
+	    layer: svgGeolocate(projection)
+	  }, {
+	    id: 'touch',
+	    layer: svgTouch()
+	  }];
+
+	  function drawLayers(selection) {
+	    svg = selection.selectAll('.surface').data([0]);
+	    svg = svg.enter().append('svg').attr('class', 'surface').merge(svg);
+	    var defs = svg.selectAll('.surface-defs').data([0]);
+	    defs.enter().append('defs').attr('class', 'surface-defs');
+	    var groups = svg.selectAll('.data-layer').data(_layers);
+	    groups.exit().remove();
+	    groups.enter().append('g').attr('class', function (d) {
+	      return 'data-layer ' + d.id;
+	    }).merge(groups).each(function (d) {
+	      select(this).call(d.layer);
+	    });
+	  }
 
-	        // enter/update
-	        targets.enter()
-	            .append('path')
-	            .merge(targets)
-	            .attr('d', getPath)
-	            .attr('class', function(d) {
-	                return 'way line target target-allowed ' + targetClass + d.id;
-	            })
-	            .classed('segment-edited', segmentWasEdited);
-
-	        // NOPE
-	        var nopeData = data.nopes.filter(getPath);
-	        var nopes = selection.selectAll('.line.target-nope')
-	            .filter(function(d) { return filter(d.properties.entity); })
-	            .data(nopeData, function key(d) { return d.id; });
-
-	        // exit
-	        nopes.exit()
-	            .remove();
-
-	        // enter/update
-	        nopes.enter()
-	            .append('path')
-	            .merge(nopes)
-	            .attr('d', getPath)
-	            .attr('class', function(d) {
-	                return 'way line target target-nope ' + nopeClass + d.id;
-	            })
-	            .classed('segment-edited', segmentWasEdited);
-	    }
-
-
-	    function drawLines(selection, graph, entities, filter) {
-	        var base = context.history().base();
-
-	        function waystack(a, b) {
-	            var selected = context.selectedIDs();
-	            var scoreA = selected.indexOf(a.id) !== -1 ? 20 : 0;
-	            var scoreB = selected.indexOf(b.id) !== -1 ? 20 : 0;
-
-	            if (a.tags.highway) { scoreA -= highway_stack[a.tags.highway]; }
-	            if (b.tags.highway) { scoreB -= highway_stack[b.tags.highway]; }
-	            return scoreA - scoreB;
-	        }
-
-
-	        function drawLineGroup(selection, klass, isSelected) {
-	            // Note: Don't add `.selected` class in draw modes
-	            var mode = context.mode();
-	            var isDrawing = mode && /^draw/.test(mode.id);
-	            var selectedClass = (!isDrawing && isSelected) ? 'selected ' : '';
-
-	            var lines = selection
-	                .selectAll('path')
-	                .filter(filter)
-	                .data(getPathData(isSelected), osmEntity.key);
-
-	            lines.exit()
-	                .remove();
-
-	            // Optimization: Call expensive TagClasses only on enter selection. This
-	            // works because osmEntity.key is defined to include the entity v attribute.
-	            lines.enter()
-	                .append('path')
-	                .attr('class', function(d) {
-
-	                    var prefix = 'way line';
-
-	                    // if this line isn't styled by its own tags
-	                    if (!d.hasInterestingTags()) {
-
-	                        var parentRelations = graph.parentRelations(d);
-	                        var parentMultipolygons = parentRelations.filter(function(relation) {
-	                            return relation.isMultipolygon();
-	                        });
-
-	                        // and if it's a member of at least one multipolygon relation
-	                        if (parentMultipolygons.length > 0 &&
-	                            // and only multipolygon relations
-	                            parentRelations.length === parentMultipolygons.length) {
-	                            // then fudge the classes to style this as an area edge
-	                            prefix = 'relation area';
-	                        }
-	                    }
+	  drawLayers.all = function () {
+	    return _layers;
+	  };
 
-	                    var oldMPClass = oldMultiPolygonOuters[d.id] ? 'old-multipolygon ' : '';
-	                    return prefix + ' ' + klass + ' ' + selectedClass + oldMPClass + d.id;
-	                })
-	                .classed('added', function(d) {
-	                    return !base.entities[d.id];
-	                })
-	                .classed('geometry-edited', function(d) {
-	                    return graph.entities[d.id] &&
-	                        base.entities[d.id] &&
-	                        !fastDeepEqual(graph.entities[d.id].nodes, base.entities[d.id].nodes);
-	                })
-	                .classed('retagged', function(d) {
-	                    return graph.entities[d.id] &&
-	                        base.entities[d.id] &&
-	                        !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
-	                })
-	                .call(svgTagClasses())
-	                .merge(lines)
-	                .sort(waystack)
-	                .attr('d', getPath)
-	                .call(svgTagClasses().tags(svgRelationMemberTags(graph)));
+	  drawLayers.layer = function (id) {
+	    var obj = _layers.find(function (o) {
+	      return o.id === id;
+	    });
 
-	            return selection;
-	        }
+	    return obj && obj.layer;
+	  };
 
+	  drawLayers.only = function (what) {
+	    var arr = [].concat(what);
 
-	        function getPathData(isSelected) {
-	            return function() {
-	                var layer = this.parentNode.__data__;
-	                var data = pathdata[layer] || [];
-	                return data.filter(function(d) {
-	                    if (isSelected)
-	                        { return context.selectedIDs().indexOf(d.id) !== -1; }
-	                    else
-	                        { return context.selectedIDs().indexOf(d.id) === -1; }
-	                });
-	            };
-	        }
+	    var all = _layers.map(function (layer) {
+	      return layer.id;
+	    });
 
-	        function addMarkers(layergroup, pathclass, groupclass, groupdata, marker) {
-	            var markergroup = layergroup
-	                .selectAll('g.' + groupclass)
-	                .data([pathclass]);
+	    return drawLayers.remove(utilArrayDifference(all, arr));
+	  };
 
-	            markergroup = markergroup.enter()
-	                .append('g')
-	                .attr('class', groupclass)
-	                .merge(markergroup);
+	  drawLayers.remove = function (what) {
+	    var arr = [].concat(what);
+	    arr.forEach(function (id) {
+	      _layers = _layers.filter(function (o) {
+	        return o.id !== id;
+	      });
+	    });
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	            var markers = markergroup
-	                .selectAll('path')
-	                .filter(filter)
-	                .data(
-	                    function data() { return groupdata[this.parentNode.__data__] || []; },
-	                    function key(d) { return [d.id, d.index]; }
-	                );
+	  drawLayers.add = function (what) {
+	    var arr = [].concat(what);
+	    arr.forEach(function (obj) {
+	      if ('id' in obj && 'layer' in obj) {
+	        _layers.push(obj);
+	      }
+	    });
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	            markers.exit()
-	                .remove();
+	  drawLayers.dimensions = function (val) {
+	    if (!arguments.length) return utilGetDimensions(svg);
+	    utilSetDimensions(svg, val);
+	    return this;
+	  };
 
-	            markers = markers.enter()
-	                .append('path')
-	                .attr('class', pathclass)
-	                .merge(markers)
-	                .attr('marker-mid', marker)
-	                .attr('d', function(d) { return d.d; });
+	  return utilRebind(drawLayers, dispatch, 'on');
+	}
 
-	            if (detected.ie) {
-	                markers.each(function() { this.parentNode.insertBefore(this, this); });
-	            }
-	        }
+	function svgLines(projection, context) {
+	  var detected = utilDetect();
+	  var highway_stack = {
+	    motorway: 0,
+	    motorway_link: 1,
+	    trunk: 2,
+	    trunk_link: 3,
+	    primary: 4,
+	    primary_link: 5,
+	    secondary: 6,
+	    tertiary: 7,
+	    unclassified: 8,
+	    residential: 9,
+	    service: 10,
+	    footway: 11
+	  };
+
+	  function drawTargets(selection, graph, entities, filter) {
+	    var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
+	    var getPath = svgPath(projection).geojson;
+	    var activeID = context.activeID();
+	    var base = context.history().base(); // The targets and nopes will be MultiLineString sub-segments of the ways
+
+	    var data = {
+	      targets: [],
+	      nopes: []
+	    };
+	    entities.forEach(function (way) {
+	      var features = svgSegmentWay(way, graph, activeID);
+	      data.targets.push.apply(data.targets, features.passive);
+	      data.nopes.push.apply(data.nopes, features.active);
+	    }); // Targets allow hover and vertex snapping
+
+	    var targetData = data.targets.filter(getPath);
+	    var targets = selection.selectAll('.line.target-allowed').filter(function (d) {
+	      return filter(d.properties.entity);
+	    }).data(targetData, function key(d) {
+	      return d.id;
+	    }); // exit
+
+	    targets.exit().remove();
+
+	    var segmentWasEdited = function segmentWasEdited(d) {
+	      var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes
+
+	      if (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
+	        return false;
+	      }
 
+	      return d.properties.nodes.some(function (n) {
+	        return !base.entities[n.id] || !fastDeepEqual(graph.entities[n.id].loc, base.entities[n.id].loc);
+	      });
+	    }; // enter/update
 
-	        var getPath = svgPath(projection, graph);
-	        var ways = [];
-	        var onewaydata = {};
-	        var sideddata = {};
-	        var oldMultiPolygonOuters = {};
 
-	        for (var i = 0; i < entities.length; i++) {
-	            var entity = entities[i];
-	            var outer = osmOldMultipolygonOuterMember(entity, graph);
-	            if (outer) {
-	                ways.push(entity.mergeTags(outer.tags));
-	                oldMultiPolygonOuters[outer.id] = true;
-	            } else if (entity.geometry(graph) === 'line') {
-	                ways.push(entity);
-	            }
-	        }
+	    targets.enter().append('path').merge(targets).attr('d', getPath).attr('class', function (d) {
+	      return 'way line target target-allowed ' + targetClass + d.id;
+	    }).classed('segment-edited', segmentWasEdited); // NOPE
 
-	        ways = ways.filter(getPath);
-	        var pathdata = utilArrayGroupBy(ways, function(way) { return way.layer(); });
+	    var nopeData = data.nopes.filter(getPath);
+	    var nopes = selection.selectAll('.line.target-nope').filter(function (d) {
+	      return filter(d.properties.entity);
+	    }).data(nopeData, function key(d) {
+	      return d.id;
+	    }); // exit
 
-	        Object.keys(pathdata).forEach(function(k) {
-	            var v = pathdata[k];
-	            var onewayArr = v.filter(function(d) { return d.isOneWay(); });
-	            var onewaySegments = svgMarkerSegments(
-	                projection, graph, 35,
-	                function shouldReverse(entity) { return entity.tags.oneway === '-1'; },
-	                function bothDirections(entity) {
-	                    return entity.tags.oneway === 'reversible' || entity.tags.oneway === 'alternating';
-	                }
-	            );
-	            onewaydata[k] = utilArrayFlatten(onewayArr.map(onewaySegments));
-
-	            var sidedArr = v.filter(function(d) { return d.isSided(); });
-	            var sidedSegments = svgMarkerSegments(
-	                projection, graph, 30,
-	                function shouldReverse() { return false; },
-	                function bothDirections() { return false; }
-	            );
-	            sideddata[k] = utilArrayFlatten(sidedArr.map(sidedSegments));
-	        });
+	    nopes.exit().remove(); // enter/update
 
+	    nopes.enter().append('path').merge(nopes).attr('d', getPath).attr('class', function (d) {
+	      return 'way line target target-nope ' + nopeClass + d.id;
+	    }).classed('segment-edited', segmentWasEdited);
+	  }
 
-	        var covered = selection.selectAll('.layer-osm.covered');     // under areas
-	        var uncovered = selection.selectAll('.layer-osm.lines');     // over areas
-	        var touchLayer = selection.selectAll('.layer-touch.lines');
-
-	        // Draw lines..
-	        [covered, uncovered].forEach(function(selection) {
-	            var range = (selection === covered ? range$1(-10,0) : range$1(0,11));
-	            var layergroup = selection
-	                .selectAll('g.layergroup')
-	                .data(range);
-
-	            layergroup = layergroup.enter()
-	                .append('g')
-	                .attr('class', function(d) { return 'layergroup layer' + String(d); })
-	                .merge(layergroup);
-
-	            layergroup
-	                .selectAll('g.linegroup')
-	                .data(['shadow', 'casing', 'stroke', 'shadow-highlighted', 'casing-highlighted', 'stroke-highlighted'])
-	                .enter()
-	                .append('g')
-	                .attr('class', function(d) { return 'linegroup line-' + d; });
-
-	            layergroup.selectAll('g.line-shadow')
-	                .call(drawLineGroup, 'shadow', false);
-	            layergroup.selectAll('g.line-casing')
-	                .call(drawLineGroup, 'casing', false);
-	            layergroup.selectAll('g.line-stroke')
-	                .call(drawLineGroup, 'stroke', false);
-
-	            layergroup.selectAll('g.line-shadow-highlighted')
-	                .call(drawLineGroup, 'shadow', true);
-	            layergroup.selectAll('g.line-casing-highlighted')
-	                .call(drawLineGroup, 'casing', true);
-	            layergroup.selectAll('g.line-stroke-highlighted')
-	                .call(drawLineGroup, 'stroke', true);
-
-	            addMarkers(layergroup, 'oneway', 'onewaygroup', onewaydata, 'url(#ideditor-oneway-marker)');
-	            addMarkers(layergroup, 'sided', 'sidedgroup', sideddata,
-	                function marker(d) {
-	                    var category = graph.entity(d.id).sidednessIdentifier();
-	                    return 'url(#ideditor-sided-marker-' + category + ')';
-	                }
-	            );
-	        });
+	  function drawLines(selection, graph, entities, filter) {
+	    var base = context.history().base();
 
-	        // Draw touch targets..
-	        touchLayer
-	            .call(drawTargets, graph, ways, filter);
-	    }
+	    function waystack(a, b) {
+	      var selected = context.selectedIDs();
+	      var scoreA = selected.indexOf(a.id) !== -1 ? 20 : 0;
+	      var scoreB = selected.indexOf(b.id) !== -1 ? 20 : 0;
 
+	      if (a.tags.highway) {
+	        scoreA -= highway_stack[a.tags.highway];
+	      }
 
-	    return drawLines;
-	}
+	      if (b.tags.highway) {
+	        scoreB -= highway_stack[b.tags.highway];
+	      }
 
-	function svgMidpoints(projection, context) {
-	    var targetRadius = 8;
+	      return scoreA - scoreB;
+	    }
 
-	    function drawTargets(selection, graph, entities, filter) {
-	        var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-	        var getTransform = svgPointTransform(projection).geojson;
+	    function drawLineGroup(selection, klass, isSelected) {
+	      // Note: Don't add `.selected` class in draw modes
+	      var mode = context.mode();
+	      var isDrawing = mode && /^draw/.test(mode.id);
+	      var selectedClass = !isDrawing && isSelected ? 'selected ' : '';
+	      var lines = selection.selectAll('path').filter(filter).data(getPathData(isSelected), osmEntity.key);
+	      lines.exit().remove(); // Optimization: Call expensive TagClasses only on enter selection. This
+	      // works because osmEntity.key is defined to include the entity v attribute.
 
-	        var data = entities.map(function(midpoint) {
-	            return {
-	                type: 'Feature',
-	                id: midpoint.id,
-	                properties: {
-	                    target: true,
-	                    entity: midpoint
-	                },
-	                geometry: {
-	                    type: 'Point',
-	                    coordinates: midpoint.loc
-	                }
-	            };
-	        });
+	      lines.enter().append('path').attr('class', function (d) {
+	        var prefix = 'way line'; // if this line isn't styled by its own tags
 
-	        var targets = selection.selectAll('.midpoint.target')
-	            .filter(function(d) { return filter(d.properties.entity); })
-	            .data(data, function key(d) { return d.id; });
+	        if (!d.hasInterestingTags()) {
+	          var parentRelations = graph.parentRelations(d);
+	          var parentMultipolygons = parentRelations.filter(function (relation) {
+	            return relation.isMultipolygon();
+	          }); // and if it's a member of at least one multipolygon relation
 
-	        // exit
-	        targets.exit()
-	            .remove();
+	          if (parentMultipolygons.length > 0 && // and only multipolygon relations
+	          parentRelations.length === parentMultipolygons.length) {
+	            // then fudge the classes to style this as an area edge
+	            prefix = 'relation area';
+	          }
+	        }
 
-	        // enter/update
-	        targets.enter()
-	            .append('circle')
-	            .attr('r', targetRadius)
-	            .merge(targets)
-	            .attr('class', function(d) { return 'node midpoint target ' + fillClass + d.id; })
-	            .attr('transform', getTransform);
+	        var oldMPClass = oldMultiPolygonOuters[d.id] ? 'old-multipolygon ' : '';
+	        return prefix + ' ' + klass + ' ' + selectedClass + oldMPClass + d.id;
+	      }).classed('added', function (d) {
+	        return !base.entities[d.id];
+	      }).classed('geometry-edited', function (d) {
+	        return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].nodes, base.entities[d.id].nodes);
+	      }).classed('retagged', function (d) {
+	        return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
+	      }).call(svgTagClasses()).merge(lines).sort(waystack).attr('d', getPath).call(svgTagClasses().tags(svgRelationMemberTags(graph)));
+	      return selection;
 	    }
 
+	    function getPathData(isSelected) {
+	      return function () {
+	        var layer = this.parentNode.__data__;
+	        var data = pathdata[layer] || [];
+	        return data.filter(function (d) {
+	          if (isSelected) {
+	            return context.selectedIDs().indexOf(d.id) !== -1;
+	          } else {
+	            return context.selectedIDs().indexOf(d.id) === -1;
+	          }
+	        });
+	      };
+	    }
 
-	    function drawMidpoints(selection, graph, entities, filter, extent) {
-	        var drawLayer = selection.selectAll('.layer-osm.points .points-group.midpoints');
-	        var touchLayer = selection.selectAll('.layer-touch.points');
-
-	        var mode = context.mode();
-	        if ((mode && mode.id !== 'select') || !context.map().withinEditableZoom()) {
-	            drawLayer.selectAll('.midpoint').remove();
-	            touchLayer.selectAll('.midpoint.target').remove();
-	            return;
-	        }
-
-	        var poly = extent.polygon();
-	        var midpoints = {};
+	    function addMarkers(layergroup, pathclass, groupclass, groupdata, marker) {
+	      var markergroup = layergroup.selectAll('g.' + groupclass).data([pathclass]);
+	      markergroup = markergroup.enter().append('g').attr('class', groupclass).merge(markergroup);
+	      var markers = markergroup.selectAll('path').filter(filter).data(function data() {
+	        return groupdata[this.parentNode.__data__] || [];
+	      }, function key(d) {
+	        return [d.id, d.index];
+	      });
+	      markers.exit().remove();
+	      markers = markers.enter().append('path').attr('class', pathclass).merge(markers).attr('marker-mid', marker).attr('d', function (d) {
+	        return d.d;
+	      });
 
-	        for (var i = 0; i < entities.length; i++) {
-	            var entity = entities[i];
+	      if (detected.ie) {
+	        markers.each(function () {
+	          this.parentNode.insertBefore(this, this);
+	        });
+	      }
+	    }
 
-	            if (entity.type !== 'way') { continue; }
-	            if (!filter(entity)) { continue; }
-	            if (context.selectedIDs().indexOf(entity.id) < 0) { continue; }
+	    var getPath = svgPath(projection, graph);
+	    var ways = [];
+	    var onewaydata = {};
+	    var sideddata = {};
+	    var oldMultiPolygonOuters = {};
+
+	    for (var i = 0; i < entities.length; i++) {
+	      var entity = entities[i];
+	      var outer = osmOldMultipolygonOuterMember(entity, graph);
+
+	      if (outer) {
+	        ways.push(entity.mergeTags(outer.tags));
+	        oldMultiPolygonOuters[outer.id] = true;
+	      } else if (entity.geometry(graph) === 'line') {
+	        ways.push(entity);
+	      }
+	    }
 
-	            var nodes = graph.childNodes(entity);
-	            for (var j = 0; j < nodes.length - 1; j++) {
-	                var a = nodes[j];
-	                var b = nodes[j + 1];
-	                var id = [a.id, b.id].sort().join('-');
+	    ways = ways.filter(getPath);
+	    var pathdata = utilArrayGroupBy(ways, function (way) {
+	      return way.layer();
+	    });
+	    Object.keys(pathdata).forEach(function (k) {
+	      var v = pathdata[k];
+	      var onewayArr = v.filter(function (d) {
+	        return d.isOneWay();
+	      });
+	      var onewaySegments = svgMarkerSegments(projection, graph, 35, function shouldReverse(entity) {
+	        return entity.tags.oneway === '-1';
+	      }, function bothDirections(entity) {
+	        return entity.tags.oneway === 'reversible' || entity.tags.oneway === 'alternating';
+	      });
+	      onewaydata[k] = utilArrayFlatten(onewayArr.map(onewaySegments));
+	      var sidedArr = v.filter(function (d) {
+	        return d.isSided();
+	      });
+	      var sidedSegments = svgMarkerSegments(projection, graph, 30, function shouldReverse() {
+	        return false;
+	      }, function bothDirections() {
+	        return false;
+	      });
+	      sideddata[k] = utilArrayFlatten(sidedArr.map(sidedSegments));
+	    });
+	    var covered = selection.selectAll('.layer-osm.covered'); // under areas
 
-	                if (midpoints[id]) {
-	                    midpoints[id].parents.push(entity);
-	                } else if (geoVecLength(projection(a.loc), projection(b.loc)) > 40) {
-	                    var point = geoVecInterp(a.loc, b.loc, 0.5);
-	                    var loc = null;
+	    var uncovered = selection.selectAll('.layer-osm.lines'); // over areas
 
-	                    if (extent.intersects(point)) {
-	                        loc = point;
-	                    } else {
-	                        for (var k = 0; k < 4; k++) {
-	                            point = geoLineIntersection([a.loc, b.loc], [poly[k], poly[k + 1]]);
-	                            if (point &&
-	                                geoVecLength(projection(a.loc), projection(point)) > 20 &&
-	                                geoVecLength(projection(b.loc), projection(point)) > 20)
-	                            {
-	                                loc = point;
-	                                break;
-	                            }
-	                        }
-	                    }
+	    var touchLayer = selection.selectAll('.layer-touch.lines'); // Draw lines..
 
-	                    if (loc) {
-	                        midpoints[id] = {
-	                            type: 'midpoint',
-	                            id: id,
-	                            loc: loc,
-	                            edge: [a.id, b.id],
-	                            parents: [entity]
-	                        };
-	                    }
-	                }
-	            }
-	        }
+	    [covered, uncovered].forEach(function (selection) {
+	      var range = selection === covered ? range$1(-10, 0) : range$1(0, 11);
+	      var layergroup = selection.selectAll('g.layergroup').data(range);
+	      layergroup = layergroup.enter().append('g').attr('class', function (d) {
+	        return 'layergroup layer' + String(d);
+	      }).merge(layergroup);
+	      layergroup.selectAll('g.linegroup').data(['shadow', 'casing', 'stroke', 'shadow-highlighted', 'casing-highlighted', 'stroke-highlighted']).enter().append('g').attr('class', function (d) {
+	        return 'linegroup line-' + d;
+	      });
+	      layergroup.selectAll('g.line-shadow').call(drawLineGroup, 'shadow', false);
+	      layergroup.selectAll('g.line-casing').call(drawLineGroup, 'casing', false);
+	      layergroup.selectAll('g.line-stroke').call(drawLineGroup, 'stroke', false);
+	      layergroup.selectAll('g.line-shadow-highlighted').call(drawLineGroup, 'shadow', true);
+	      layergroup.selectAll('g.line-casing-highlighted').call(drawLineGroup, 'casing', true);
+	      layergroup.selectAll('g.line-stroke-highlighted').call(drawLineGroup, 'stroke', true);
+	      addMarkers(layergroup, 'oneway', 'onewaygroup', onewaydata, 'url(#ideditor-oneway-marker)');
+	      addMarkers(layergroup, 'sided', 'sidedgroup', sideddata, function marker(d) {
+	        var category = graph.entity(d.id).sidednessIdentifier();
+	        return 'url(#ideditor-sided-marker-' + category + ')';
+	      });
+	    }); // Draw touch targets..
 
+	    touchLayer.call(drawTargets, graph, ways, filter);
+	  }
 
-	        function midpointFilter(d) {
-	            if (midpoints[d.id])
-	                { return true; }
+	  return drawLines;
+	}
 
-	            for (var i = 0; i < d.parents.length; i++) {
-	                if (filter(d.parents[i])) {
-	                    return true;
-	                }
-	            }
+	function svgMidpoints(projection, context) {
+	  var targetRadius = 8;
 
-	            return false;
+	  function drawTargets(selection, graph, entities, filter) {
+	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var getTransform = svgPointTransform(projection).geojson;
+	    var data = entities.map(function (midpoint) {
+	      return {
+	        type: 'Feature',
+	        id: midpoint.id,
+	        properties: {
+	          target: true,
+	          entity: midpoint
+	        },
+	        geometry: {
+	          type: 'Point',
+	          coordinates: midpoint.loc
 	        }
+	      };
+	    });
+	    var targets = selection.selectAll('.midpoint.target').filter(function (d) {
+	      return filter(d.properties.entity);
+	    }).data(data, function key(d) {
+	      return d.id;
+	    }); // exit
+
+	    targets.exit().remove(); // enter/update
 
+	    targets.enter().append('circle').attr('r', targetRadius).merge(targets).attr('class', function (d) {
+	      return 'node midpoint target ' + fillClass + d.id;
+	    }).attr('transform', getTransform);
+	  }
 
-	        var groups = drawLayer.selectAll('.midpoint')
-	            .filter(midpointFilter)
-	            .data(Object.values(midpoints), function(d) { return d.id; });
+	  function drawMidpoints(selection, graph, entities, filter, extent) {
+	    var drawLayer = selection.selectAll('.layer-osm.points .points-group.midpoints');
+	    var touchLayer = selection.selectAll('.layer-touch.points');
+	    var mode = context.mode();
 
-	        groups.exit()
-	            .remove();
+	    if (mode && mode.id !== 'select' || !context.map().withinEditableZoom()) {
+	      drawLayer.selectAll('.midpoint').remove();
+	      touchLayer.selectAll('.midpoint.target').remove();
+	      return;
+	    }
 
-	        var enter = groups.enter()
-	            .insert('g', ':first-child')
-	            .attr('class', 'midpoint');
+	    var poly = extent.polygon();
+	    var midpoints = {};
 
-	        enter
-	            .append('polygon')
-	            .attr('points', '-6,8 10,0 -6,-8')
-	            .attr('class', 'shadow');
+	    for (var i = 0; i < entities.length; i++) {
+	      var entity = entities[i];
+	      if (entity.type !== 'way') continue;
+	      if (!filter(entity)) continue;
+	      if (context.selectedIDs().indexOf(entity.id) < 0) continue;
+	      var nodes = graph.childNodes(entity);
 
-	        enter
-	            .append('polygon')
-	            .attr('points', '-3,4 5,0 -3,-4')
-	            .attr('class', 'fill');
+	      for (var j = 0; j < nodes.length - 1; j++) {
+	        var a = nodes[j];
+	        var b = nodes[j + 1];
+	        var id = [a.id, b.id].sort().join('-');
 
-	        groups = groups
-	            .merge(enter)
-	            .attr('transform', function(d) {
-	                var translate = svgPointTransform(projection);
-	                var a = graph.entity(d.edge[0]);
-	                var b = graph.entity(d.edge[1]);
-	                var angle = geoAngle(a, b, projection) * (180 / Math.PI);
-	                return translate(d) + ' rotate(' + angle + ')';
-	            })
-	            .call(svgTagClasses().tags(
-	                function(d) { return d.parents[0].tags; }
-	            ));
+	        if (midpoints[id]) {
+	          midpoints[id].parents.push(entity);
+	        } else if (geoVecLength(projection(a.loc), projection(b.loc)) > 40) {
+	          var point = geoVecInterp(a.loc, b.loc, 0.5);
+	          var loc = null;
 
-	        // Propagate data bindings.
-	        groups.select('polygon.shadow');
-	        groups.select('polygon.fill');
+	          if (extent.intersects(point)) {
+	            loc = point;
+	          } else {
+	            for (var k = 0; k < 4; k++) {
+	              point = geoLineIntersection([a.loc, b.loc], [poly[k], poly[k + 1]]);
 
+	              if (point && geoVecLength(projection(a.loc), projection(point)) > 20 && geoVecLength(projection(b.loc), projection(point)) > 20) {
+	                loc = point;
+	                break;
+	              }
+	            }
+	          }
 
-	        // Draw touch targets..
-	        touchLayer
-	            .call(drawTargets, graph, Object.values(midpoints), midpointFilter);
+	          if (loc) {
+	            midpoints[id] = {
+	              type: 'midpoint',
+	              id: id,
+	              loc: loc,
+	              edge: [a.id, b.id],
+	              parents: [entity]
+	            };
+	          }
+	        }
+	      }
 	    }
 
-	    return drawMidpoints;
-	}
+	    function midpointFilter(d) {
+	      if (midpoints[d.id]) return true;
 
-	function svgPoints(projection, context) {
+	      for (var i = 0; i < d.parents.length; i++) {
+	        if (filter(d.parents[i])) {
+	          return true;
+	        }
+	      }
 
-	    function markerPath(selection, klass) {
-	        selection
-	            .attr('class', klass)
-	            .attr('transform', 'translate(-8, -23)')
-	            .attr('d', 'M 17,8 C 17,13 11,21 8.5,23.5 C 6,21 0,13 0,8 C 0,4 4,-0.5 8.5,-0.5 C 13,-0.5 17,4 17,8 z');
+	      return false;
 	    }
 
-	    function sortY(a, b) {
-	        return b.loc[1] - a.loc[1];
-	    }
+	    var groups = drawLayer.selectAll('.midpoint').filter(midpointFilter).data(Object.values(midpoints), function (d) {
+	      return d.id;
+	    });
+	    groups.exit().remove();
+	    var enter = groups.enter().insert('g', ':first-child').attr('class', 'midpoint');
+	    enter.append('polygon').attr('points', '-6,8 10,0 -6,-8').attr('class', 'shadow');
+	    enter.append('polygon').attr('points', '-3,4 5,0 -3,-4').attr('class', 'fill');
+	    groups = groups.merge(enter).attr('transform', function (d) {
+	      var translate = svgPointTransform(projection);
+	      var a = graph.entity(d.edge[0]);
+	      var b = graph.entity(d.edge[1]);
+	      var angle = geoAngle(a, b, projection) * (180 / Math.PI);
+	      return translate(d) + ' rotate(' + angle + ')';
+	    }).call(svgTagClasses().tags(function (d) {
+	      return d.parents[0].tags;
+	    })); // Propagate data bindings.
 
+	    groups.select('polygon.shadow');
+	    groups.select('polygon.fill'); // Draw touch targets..
 
-	    // Avoid exit/enter if we're just moving stuff around.
-	    // The node will get a new version but we only need to run the update selection.
-	    function fastEntityKey(d) {
-	        var mode = context.mode();
-	        var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
-	        return isMoving ? d.id : osmEntity.key(d);
-	    }
+	    touchLayer.call(drawTargets, graph, Object.values(midpoints), midpointFilter);
+	  }
 
+	  return drawMidpoints;
+	}
 
-	    function drawTargets(selection, graph, entities, filter) {
-	        var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-	        var getTransform = svgPointTransform(projection).geojson;
-	        var activeID = context.activeID();
-	        var data = [];
+	function svgPoints(projection, context) {
+	  function markerPath(selection, klass) {
+	    selection.attr('class', klass).attr('transform', 'translate(-8, -23)').attr('d', 'M 17,8 C 17,13 11,21 8.5,23.5 C 6,21 0,13 0,8 C 0,4 4,-0.5 8.5,-0.5 C 13,-0.5 17,4 17,8 z');
+	  }
 
-	        entities.forEach(function(node) {
-	            if (activeID === node.id) { return; }   // draw no target on the activeID
+	  function sortY(a, b) {
+	    return b.loc[1] - a.loc[1];
+	  } // Avoid exit/enter if we're just moving stuff around.
+	  // The node will get a new version but we only need to run the update selection.
 
-	            data.push({
-	                type: 'Feature',
-	                id: node.id,
-	                properties: {
-	                    target: true,
-	                    entity: node
-	                },
-	                geometry: node.asGeoJSON()
-	            });
-	        });
 
-	        var targets = selection.selectAll('.point.target')
-	            .filter(function(d) { return filter(d.properties.entity); })
-	            .data(data, function key(d) { return d.id; });
-
-	        // exit
-	        targets.exit()
-	            .remove();
-
-	        // enter/update
-	        targets.enter()
-	            .append('rect')
-	            .attr('x', -10)
-	            .attr('y', -26)
-	            .attr('width', 20)
-	            .attr('height', 30)
-	            .merge(targets)
-	            .attr('class', function(d) { return 'node point target ' + fillClass + d.id; })
-	            .attr('transform', getTransform);
-	    }
-
-
-	    function drawPoints(selection, graph, entities, filter) {
-	        var wireframe = context.surface().classed('fill-wireframe');
-	        var zoom = geoScaleToZoom(projection.scale());
-	        var base = context.history().base();
-
-	        // Points with a direction will render as vertices at higher zooms..
-	        function renderAsPoint(entity) {
-	            return entity.geometry(graph) === 'point' &&
-	                !(zoom >= 18 && entity.directions(graph, projection).length);
-	        }
-
-	        // All points will render as vertices in wireframe mode too..
-	        var points = wireframe ? [] : entities.filter(renderAsPoint);
-	        points.sort(sortY);
-
-
-	        var drawLayer = selection.selectAll('.layer-osm.points .points-group.points');
-	        var touchLayer = selection.selectAll('.layer-touch.points');
-
-	        // Draw points..
-	        var groups = drawLayer.selectAll('g.point')
-	            .filter(filter)
-	            .data(points, fastEntityKey);
-
-	        groups.exit()
-	            .remove();
-
-	        var enter = groups.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'node point ' + d.id; })
-	            .order();
-
-	        enter
-	            .append('path')
-	            .call(markerPath, 'shadow');
-
-	        enter
-	            .append('ellipse')
-	            .attr('cx', 0.5)
-	            .attr('cy', 1)
-	            .attr('rx', 6.5)
-	            .attr('ry', 3)
-	            .attr('class', 'stroke');
-
-	        enter
-	            .append('path')
-	            .call(markerPath, 'stroke');
-
-	        enter
-	            .append('use')
-	            .attr('transform', 'translate(-5, -19)')
-	            .attr('class', 'icon')
-	            .attr('width', '11px')
-	            .attr('height', '11px');
-
-	        groups = groups
-	            .merge(enter)
-	            .attr('transform', svgPointTransform(projection))
-	            .classed('added', function(d) {
-	                return !base.entities[d.id]; // if it doesn't exist in the base graph, it's new
-	            })
-	            .classed('moved', function(d) {
-	                return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].loc, base.entities[d.id].loc);
-	            })
-	            .classed('retagged', function(d) {
-	                return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
-	            })
-	            .call(svgTagClasses());
-
-	        groups.select('.shadow');   // propagate bound data
-	        groups.select('.stroke');   // propagate bound data
-	        groups.select('.icon')      // propagate bound data
-	            .attr('xlink:href', function(entity) {
-	                var preset = _mainPresetIndex.match(entity, graph);
-	                var picon = preset && preset.icon;
-
-	                if (!picon) {
-	                    return '';
-	                } else {
-	                    var isMaki = /^maki-/.test(picon);
-	                    return '#' + picon + (isMaki ? '-11' : '');
-	                }
-	            });
+	  function fastEntityKey(d) {
+	    var mode = context.mode();
+	    var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
+	    return isMoving ? d.id : osmEntity.key(d);
+	  }
 
+	  function drawTargets(selection, graph, entities, filter) {
+	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var getTransform = svgPointTransform(projection).geojson;
+	    var activeID = context.activeID();
+	    var data = [];
+	    entities.forEach(function (node) {
+	      if (activeID === node.id) return; // draw no target on the activeID
 
-	        // Draw touch targets..
-	        touchLayer
-	            .call(drawTargets, graph, points, filter);
-	    }
+	      data.push({
+	        type: 'Feature',
+	        id: node.id,
+	        properties: {
+	          target: true,
+	          entity: node
+	        },
+	        geometry: node.asGeoJSON()
+	      });
+	    });
+	    var targets = selection.selectAll('.point.target').filter(function (d) {
+	      return filter(d.properties.entity);
+	    }).data(data, function key(d) {
+	      return d.id;
+	    }); // exit
+
+	    targets.exit().remove(); // enter/update
+
+	    targets.enter().append('rect').attr('x', -10).attr('y', -26).attr('width', 20).attr('height', 30).merge(targets).attr('class', function (d) {
+	      return 'node point target ' + fillClass + d.id;
+	    }).attr('transform', getTransform);
+	  }
+
+	  function drawPoints(selection, graph, entities, filter) {
+	    var wireframe = context.surface().classed('fill-wireframe');
+	    var zoom = geoScaleToZoom(projection.scale());
+	    var base = context.history().base(); // Points with a direction will render as vertices at higher zooms..
+
+	    function renderAsPoint(entity) {
+	      return entity.geometry(graph) === 'point' && !(zoom >= 18 && entity.directions(graph, projection).length);
+	    } // All points will render as vertices in wireframe mode too..
+
+
+	    var points = wireframe ? [] : entities.filter(renderAsPoint);
+	    points.sort(sortY);
+	    var drawLayer = selection.selectAll('.layer-osm.points .points-group.points');
+	    var touchLayer = selection.selectAll('.layer-touch.points'); // Draw points..
+
+	    var groups = drawLayer.selectAll('g.point').filter(filter).data(points, fastEntityKey);
+	    groups.exit().remove();
+	    var enter = groups.enter().append('g').attr('class', function (d) {
+	      return 'node point ' + d.id;
+	    }).order();
+	    enter.append('path').call(markerPath, 'shadow');
+	    enter.append('ellipse').attr('cx', 0.5).attr('cy', 1).attr('rx', 6.5).attr('ry', 3).attr('class', 'stroke');
+	    enter.append('path').call(markerPath, 'stroke');
+	    enter.append('use').attr('transform', 'translate(-5, -19)').attr('class', 'icon').attr('width', '11px').attr('height', '11px');
+	    groups = groups.merge(enter).attr('transform', svgPointTransform(projection)).classed('added', function (d) {
+	      return !base.entities[d.id]; // if it doesn't exist in the base graph, it's new
+	    }).classed('moved', function (d) {
+	      return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].loc, base.entities[d.id].loc);
+	    }).classed('retagged', function (d) {
+	      return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
+	    }).call(svgTagClasses());
+	    groups.select('.shadow'); // propagate bound data
+
+	    groups.select('.stroke'); // propagate bound data
+
+	    groups.select('.icon') // propagate bound data
+	    .attr('xlink:href', function (entity) {
+	      var preset = _mainPresetIndex.match(entity, graph);
+	      var picon = preset && preset.icon;
+
+	      if (!picon) {
+	        return '';
+	      } else {
+	        var isMaki = /^maki-/.test(picon);
+	        return '#' + picon + (isMaki ? '-11' : '');
+	      }
+	    }); // Draw touch targets..
 
+	    touchLayer.call(drawTargets, graph, points, filter);
+	  }
 
-	    return drawPoints;
+	  return drawPoints;
 	}
 
 	function svgTurns(projection, context) {
+	  function icon(turn) {
+	    var u = turn.u ? '-u' : '';
+	    if (turn.no) return '#iD-turn-no' + u;
+	    if (turn.only) return '#iD-turn-only' + u;
+	    return '#iD-turn-yes' + u;
+	  }
 
-	    function icon(turn) {
-	        var u = turn.u ? '-u' : '';
-	        if (turn.no) { return '#iD-turn-no' + u; }
-	        if (turn.only) { return '#iD-turn-only' + u; }
-	        return '#iD-turn-yes' + u;
-	    }
-
-	    function drawTurns(selection, graph, turns) {
+	  function drawTurns(selection, graph, turns) {
+	    function turnTransform(d) {
+	      var pxRadius = 50;
+	      var toWay = graph.entity(d.to.way);
+	      var toPoints = graph.childNodes(toWay).map(function (n) {
+	        return n.loc;
+	      }).map(projection);
+	      var toLength = geoPathLength(toPoints);
+	      var mid = toLength / 2; // midpoint of destination way
 
-	        function turnTransform(d) {
-	            var pxRadius = 50;
-	            var toWay = graph.entity(d.to.way);
-	            var toPoints = graph.childNodes(toWay)
-	                .map(function (n) { return n.loc; })
-	                .map(projection);
-	            var toLength = geoPathLength(toPoints);
-	            var mid = toLength / 2;    // midpoint of destination way
+	      var toNode = graph.entity(d.to.node);
+	      var toVertex = graph.entity(d.to.vertex);
+	      var a = geoAngle(toVertex, toNode, projection);
+	      var o = projection(toVertex.loc);
+	      var r = d.u ? 0 // u-turn: no radius
+	      : !toWay.__via ? pxRadius // leaf way: put marker at pxRadius
+	      : Math.min(mid, pxRadius); // via way: prefer pxRadius, fallback to mid for very short ways
 
-	            var toNode = graph.entity(d.to.node);
-	            var toVertex = graph.entity(d.to.vertex);
-	            var a = geoAngle(toVertex, toNode, projection);
-	            var o = projection(toVertex.loc);
-	            var r = d.u ? 0                  // u-turn: no radius
-	                : !toWay.__via ? pxRadius    // leaf way: put marker at pxRadius
-	                : Math.min(mid, pxRadius);   // via way: prefer pxRadius, fallback to mid for very short ways
+	      return 'translate(' + (r * Math.cos(a) + o[0]) + ',' + (r * Math.sin(a) + o[1]) + ') ' + 'rotate(' + a * 180 / Math.PI + ')';
+	    }
 
-	            return 'translate(' + (r * Math.cos(a) + o[0]) + ',' + (r * Math.sin(a) + o[1]) + ') ' +
-	                'rotate(' + a * 180 / Math.PI + ')';
-	        }
+	    var drawLayer = selection.selectAll('.layer-osm.points .points-group.turns');
+	    var touchLayer = selection.selectAll('.layer-touch.turns'); // Draw turns..
 
+	    var groups = drawLayer.selectAll('g.turn').data(turns, function (d) {
+	      return d.key;
+	    }); // exit
 
-	        var drawLayer = selection.selectAll('.layer-osm.points .points-group.turns');
-	        var touchLayer = selection.selectAll('.layer-touch.turns');
+	    groups.exit().remove(); // enter
 
-	        // Draw turns..
-	        var groups = drawLayer.selectAll('g.turn')
-	            .data(turns, function(d) { return d.key; });
+	    var groupsEnter = groups.enter().append('g').attr('class', function (d) {
+	      return 'turn ' + d.key;
+	    });
+	    var turnsEnter = groupsEnter.filter(function (d) {
+	      return !d.u;
+	    });
+	    turnsEnter.append('rect').attr('transform', 'translate(-22, -12)').attr('width', '44').attr('height', '24');
+	    turnsEnter.append('use').attr('transform', 'translate(-22, -12)').attr('width', '44').attr('height', '24');
+	    var uEnter = groupsEnter.filter(function (d) {
+	      return d.u;
+	    });
+	    uEnter.append('circle').attr('r', '16');
+	    uEnter.append('use').attr('transform', 'translate(-16, -16)').attr('width', '32').attr('height', '32'); // update
 
-	        // exit
-	        groups.exit()
-	            .remove();
+	    groups = groups.merge(groupsEnter).attr('opacity', function (d) {
+	      return d.direct === false ? '0.7' : null;
+	    }).attr('transform', turnTransform);
+	    groups.select('use').attr('xlink:href', icon);
+	    groups.select('rect'); // propagate bound data
 
-	        // enter
-	        var groupsEnter = groups.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'turn ' + d.key; });
+	    groups.select('circle'); // propagate bound data
+	    // Draw touch targets..
 
-	        var turnsEnter = groupsEnter
-	            .filter(function(d) { return !d.u; });
+	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    groups = touchLayer.selectAll('g.turn').data(turns, function (d) {
+	      return d.key;
+	    }); // exit
 
-	        turnsEnter.append('rect')
-	            .attr('transform', 'translate(-22, -12)')
-	            .attr('width', '44')
-	            .attr('height', '24');
+	    groups.exit().remove(); // enter
 
-	        turnsEnter.append('use')
-	            .attr('transform', 'translate(-22, -12)')
-	            .attr('width', '44')
-	            .attr('height', '24');
+	    groupsEnter = groups.enter().append('g').attr('class', function (d) {
+	      return 'turn ' + d.key;
+	    });
+	    turnsEnter = groupsEnter.filter(function (d) {
+	      return !d.u;
+	    });
+	    turnsEnter.append('rect').attr('class', 'target ' + fillClass).attr('transform', 'translate(-22, -12)').attr('width', '44').attr('height', '24');
+	    uEnter = groupsEnter.filter(function (d) {
+	      return d.u;
+	    });
+	    uEnter.append('circle').attr('class', 'target ' + fillClass).attr('r', '16'); // update
 
-	        var uEnter = groupsEnter
-	            .filter(function(d) { return d.u; });
+	    groups = groups.merge(groupsEnter).attr('transform', turnTransform);
+	    groups.select('rect'); // propagate bound data
 
-	        uEnter.append('circle')
-	            .attr('r', '16');
+	    groups.select('circle'); // propagate bound data
 
-	        uEnter.append('use')
-	            .attr('transform', 'translate(-16, -16)')
-	            .attr('width', '32')
-	            .attr('height', '32');
+	    return this;
+	  }
 
-	        // update
-	        groups = groups
-	            .merge(groupsEnter)
-	            .attr('opacity', function(d) { return d.direct === false ? '0.7' : null; })
-	            .attr('transform', turnTransform);
+	  return drawTurns;
+	}
 
-	        groups.select('use')
-	            .attr('xlink:href', icon);
+	function svgVertices(projection, context) {
+	  var radiuses = {
+	    //       z16-, z17,   z18+,  w/icon
+	    shadow: [6, 7.5, 7.5, 12],
+	    stroke: [2.5, 3.5, 3.5, 8],
+	    fill: [1, 1.5, 1.5, 1.5]
+	  };
 
-	        groups.select('rect');      // propagate bound data
-	        groups.select('circle');    // propagate bound data
+	  var _currHoverTarget;
 
+	  var _currPersistent = {};
+	  var _currHover = {};
+	  var _prevHover = {};
+	  var _currSelected = {};
+	  var _prevSelected = {};
+	  var _radii = {};
 
-	        // Draw touch targets..
-	        var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-	        groups = touchLayer.selectAll('g.turn')
-	            .data(turns, function(d) { return d.key; });
+	  function sortY(a, b) {
+	    return b.loc[1] - a.loc[1];
+	  } // Avoid exit/enter if we're just moving stuff around.
+	  // The node will get a new version but we only need to run the update selection.
 
-	        // exit
-	        groups.exit()
-	            .remove();
 
-	        // enter
-	        groupsEnter = groups.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'turn ' + d.key; });
+	  function fastEntityKey(d) {
+	    var mode = context.mode();
+	    var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
+	    return isMoving ? d.id : osmEntity.key(d);
+	  }
+
+	  function draw(selection, graph, vertices, sets, filter) {
+	    sets = sets || {
+	      selected: {},
+	      important: {},
+	      hovered: {}
+	    };
+	    var icons = {};
+	    var directions = {};
+	    var wireframe = context.surface().classed('fill-wireframe');
+	    var zoom = geoScaleToZoom(projection.scale());
+	    var z = zoom < 17 ? 0 : zoom < 18 ? 1 : 2;
+	    var activeID = context.activeID();
+	    var base = context.history().base();
+
+	    function getIcon(d) {
+	      // always check latest entity, as fastEntityKey avoids enter/exit now
+	      var entity = graph.entity(d.id);
+	      if (entity.id in icons) return icons[entity.id];
+	      icons[entity.id] = entity.hasInterestingTags() && _mainPresetIndex.match(entity, graph).icon;
+	      return icons[entity.id];
+	    } // memoize directions results, return false for empty arrays (for use in filter)
+
+
+	    function getDirections(entity) {
+	      if (entity.id in directions) return directions[entity.id];
+	      var angles = entity.directions(graph, projection);
+	      directions[entity.id] = angles.length ? angles : false;
+	      return angles;
+	    }
+
+	    function updateAttributes(selection) {
+	      ['shadow', 'stroke', 'fill'].forEach(function (klass) {
+	        var rads = radiuses[klass];
+	        selection.selectAll('.' + klass).each(function (entity) {
+	          var i = z && getIcon(entity);
+	          var r = rads[i ? 3 : z]; // slightly increase the size of unconnected endpoints #3775
+
+	          if (entity.id !== activeID && entity.isEndpoint(graph) && !entity.isConnected(graph)) {
+	            r += 1.5;
+	          }
 
-	        turnsEnter = groupsEnter
-	            .filter(function(d) { return !d.u; });
+	          if (klass === 'shadow') {
+	            // remember this value, so we don't need to
+	            _radii[entity.id] = r; // recompute it when we draw the touch targets
+	          }
 
-	        turnsEnter.append('rect')
-	            .attr('class', 'target ' + fillClass)
-	            .attr('transform', 'translate(-22, -12)')
-	            .attr('width', '44')
-	            .attr('height', '24');
+	          select(this).attr('r', r).attr('visibility', i && klass === 'fill' ? 'hidden' : null);
+	        });
+	      });
+	    }
 
-	        uEnter = groupsEnter
-	            .filter(function(d) { return d.u; });
+	    vertices.sort(sortY);
+	    var groups = selection.selectAll('g.vertex').filter(filter).data(vertices, fastEntityKey); // exit
 
-	        uEnter.append('circle')
-	            .attr('class', 'target ' + fillClass)
-	            .attr('r', '16');
+	    groups.exit().remove(); // enter
 
-	        // update
-	        groups = groups
-	            .merge(groupsEnter)
-	            .attr('transform', turnTransform);
+	    var enter = groups.enter().append('g').attr('class', function (d) {
+	      return 'node vertex ' + d.id;
+	    }).order();
+	    enter.append('circle').attr('class', 'shadow');
+	    enter.append('circle').attr('class', 'stroke'); // Vertices with tags get a fill.
 
-	        groups.select('rect');      // propagate bound data
-	        groups.select('circle');    // propagate bound data
+	    enter.filter(function (d) {
+	      return d.hasInterestingTags();
+	    }).append('circle').attr('class', 'fill'); // update
 
+	    groups = groups.merge(enter).attr('transform', svgPointTransform(projection)).classed('sibling', function (d) {
+	      return d.id in sets.selected;
+	    }).classed('shared', function (d) {
+	      return graph.isShared(d);
+	    }).classed('endpoint', function (d) {
+	      return d.isEndpoint(graph);
+	    }).classed('added', function (d) {
+	      return !base.entities[d.id]; // if it doesn't exist in the base graph, it's new
+	    }).classed('moved', function (d) {
+	      return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].loc, base.entities[d.id].loc);
+	    }).classed('retagged', function (d) {
+	      return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
+	    }).call(updateAttributes); // Vertices with icons get a `use`.
 
-	        return this;
-	    }
+	    var iconUse = groups.selectAll('.icon').data(function data(d) {
+	      return zoom >= 17 && getIcon(d) ? [d] : [];
+	    }, fastEntityKey); // exit
 
-	    return drawTurns;
-	}
+	    iconUse.exit().remove(); // enter
 
-	function svgVertices(projection, context) {
-	    var radiuses = {
-	        //       z16-, z17,   z18+,  w/icon
-	        shadow: [6,    7.5,   7.5,   12],
-	        stroke: [2.5,  3.5,   3.5,   8],
-	        fill:   [1,    1.5,   1.5,   1.5]
-	    };
+	    iconUse.enter().append('use').attr('class', 'icon').attr('width', '11px').attr('height', '11px').attr('transform', 'translate(-5.5, -5.5)').attr('xlink:href', function (d) {
+	      var picon = getIcon(d);
+	      var isMaki = /^maki-/.test(picon);
+	      return '#' + picon + (isMaki ? '-11' : '');
+	    }); // Vertices with directions get viewfields
 
-	    var _currHoverTarget;
-	    var _currPersistent = {};
-	    var _currHover = {};
-	    var _prevHover = {};
-	    var _currSelected = {};
-	    var _prevSelected = {};
-	    var _radii = {};
+	    var dgroups = groups.selectAll('.viewfieldgroup').data(function data(d) {
+	      return zoom >= 18 && getDirections(d) ? [d] : [];
+	    }, fastEntityKey); // exit
 
+	    dgroups.exit().remove(); // enter/update
 
-	    function sortY(a, b) {
-	        return b.loc[1] - a.loc[1];
-	    }
+	    dgroups = dgroups.enter().insert('g', '.shadow').attr('class', 'viewfieldgroup').merge(dgroups);
+	    var viewfields = dgroups.selectAll('.viewfield').data(getDirections, function key(d) {
+	      return osmEntity.key(d);
+	    }); // exit
 
-	    // Avoid exit/enter if we're just moving stuff around.
-	    // The node will get a new version but we only need to run the update selection.
-	    function fastEntityKey(d) {
-	        var mode = context.mode();
-	        var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
-	        return isMoving ? d.id : osmEntity.key(d);
-	    }
+	    viewfields.exit().remove(); // enter/update
 
+	    viewfields.enter().append('path').attr('class', 'viewfield').attr('d', 'M0,0H0').merge(viewfields).attr('marker-start', 'url(#ideditor-viewfield-marker' + (wireframe ? '-wireframe' : '') + ')').attr('transform', function (d) {
+	      return 'rotate(' + d + ')';
+	    });
+	  }
 
-	    function draw(selection, graph, vertices, sets, filter) {
-	        sets = sets || { selected: {}, important: {}, hovered: {} };
+	  function drawTargets(selection, graph, entities, filter) {
+	    var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
+	    var getTransform = svgPointTransform(projection).geojson;
+	    var activeID = context.activeID();
+	    var data = {
+	      targets: [],
+	      nopes: []
+	    };
+	    entities.forEach(function (node) {
+	      if (activeID === node.id) return; // draw no target on the activeID
 
-	        var icons = {};
-	        var directions = {};
-	        var wireframe = context.surface().classed('fill-wireframe');
-	        var zoom = geoScaleToZoom(projection.scale());
-	        var z = (zoom < 17 ? 0 : zoom < 18 ? 1 : 2);
-	        var activeID = context.activeID();
-	        var base = context.history().base();
+	      var vertexType = svgPassiveVertex(node, graph, activeID);
 
+	      if (vertexType !== 0) {
+	        // passive or adjacent - allow to connect
+	        data.targets.push({
+	          type: 'Feature',
+	          id: node.id,
+	          properties: {
+	            target: true,
+	            entity: node
+	          },
+	          geometry: node.asGeoJSON()
+	        });
+	      } else {
+	        data.nopes.push({
+	          type: 'Feature',
+	          id: node.id + '-nope',
+	          properties: {
+	            nope: true,
+	            target: true,
+	            entity: node
+	          },
+	          geometry: node.asGeoJSON()
+	        });
+	      }
+	    }); // Targets allow hover and vertex snapping
 
-	        function getIcon(d) {
-	            // always check latest entity, as fastEntityKey avoids enter/exit now
-	            var entity = graph.entity(d.id);
-	            if (entity.id in icons) { return icons[entity.id]; }
+	    var targets = selection.selectAll('.vertex.target-allowed').filter(function (d) {
+	      return filter(d.properties.entity);
+	    }).data(data.targets, function key(d) {
+	      return d.id;
+	    }); // exit
 
-	            icons[entity.id] =
-	                entity.hasInterestingTags() &&
-	                _mainPresetIndex.match(entity, graph).icon;
+	    targets.exit().remove(); // enter/update
 
-	            return icons[entity.id];
-	        }
+	    targets.enter().append('circle').attr('r', function (d) {
+	      return _radii[d.id] || radiuses.shadow[3];
+	    }).merge(targets).attr('class', function (d) {
+	      return 'node vertex target target-allowed ' + targetClass + d.id;
+	    }).attr('transform', getTransform); // NOPE
 
+	    var nopes = selection.selectAll('.vertex.target-nope').filter(function (d) {
+	      return filter(d.properties.entity);
+	    }).data(data.nopes, function key(d) {
+	      return d.id;
+	    }); // exit
 
-	        // memoize directions results, return false for empty arrays (for use in filter)
-	        function getDirections(entity) {
-	            if (entity.id in directions) { return directions[entity.id]; }
+	    nopes.exit().remove(); // enter/update
 
-	            var angles = entity.directions(graph, projection);
-	            directions[entity.id] = angles.length ? angles : false;
-	            return angles;
-	        }
+	    nopes.enter().append('circle').attr('r', function (d) {
+	      return _radii[d.properties.entity.id] || radiuses.shadow[3];
+	    }).merge(nopes).attr('class', function (d) {
+	      return 'node vertex target target-nope ' + nopeClass + d.id;
+	    }).attr('transform', getTransform);
+	  } // Points can also render as vertices:
+	  // 1. in wireframe mode or
+	  // 2. at higher zooms if they have a direction
 
 
-	        function updateAttributes(selection) {
-	            ['shadow', 'stroke', 'fill'].forEach(function(klass) {
-	                var rads = radiuses[klass];
-	                selection.selectAll('.' + klass)
-	                    .each(function(entity) {
-	                        var i = z && getIcon(entity);
-	                        var r = rads[i ? 3 : z];
+	  function renderAsVertex(entity, graph, wireframe, zoom) {
+	    var geometry = entity.geometry(graph);
+	    return geometry === 'vertex' || geometry === 'point' && (wireframe || zoom >= 18 && entity.directions(graph, projection).length);
+	  }
 
-	                        // slightly increase the size of unconnected endpoints #3775
-	                        if (entity.id !== activeID && entity.isEndpoint(graph) && !entity.isConnected(graph)) {
-	                            r += 1.5;
-	                        }
+	  function isEditedNode(node, base, head) {
+	    var baseNode = base.entities[node.id];
+	    var headNode = head.entities[node.id];
+	    return !headNode || !baseNode || !fastDeepEqual(headNode.tags, baseNode.tags) || !fastDeepEqual(headNode.loc, baseNode.loc);
+	  }
 
-	                        if (klass === 'shadow') {   // remember this value, so we don't need to
-	                            _radii[entity.id] = r;  // recompute it when we draw the touch targets
-	                        }
+	  function getSiblingAndChildVertices(ids, graph, wireframe, zoom) {
+	    var results = {};
+	    var seenIds = {};
 
-	                        select(this)
-	                            .attr('r', r)
-	                            .attr('visibility', (i && klass === 'fill') ? 'hidden' : null);
-	                    });
-	            });
-	        }
+	    function addChildVertices(entity) {
+	      // avoid redundant work and infinite recursion of circular relations
+	      if (seenIds[entity.id]) return;
+	      seenIds[entity.id] = true;
+	      var geometry = entity.geometry(graph);
 
-	        vertices.sort(sortY);
-
-	        var groups = selection.selectAll('g.vertex')
-	            .filter(filter)
-	            .data(vertices, fastEntityKey);
-
-	        // exit
-	        groups.exit()
-	            .remove();
-
-	        // enter
-	        var enter = groups.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'node vertex ' + d.id; })
-	            .order();
-
-	        enter
-	            .append('circle')
-	            .attr('class', 'shadow');
-
-	        enter
-	            .append('circle')
-	            .attr('class', 'stroke');
-
-	        // Vertices with tags get a fill.
-	        enter.filter(function(d) { return d.hasInterestingTags(); })
-	            .append('circle')
-	            .attr('class', 'fill');
-
-	        // update
-	        groups = groups
-	            .merge(enter)
-	            .attr('transform', svgPointTransform(projection))
-	            .classed('sibling', function(d) { return d.id in sets.selected; })
-	            .classed('shared', function(d) { return graph.isShared(d); })
-	            .classed('endpoint', function(d) { return d.isEndpoint(graph); })
-	            .classed('added', function(d) {
-	                return !base.entities[d.id]; // if it doesn't exist in the base graph, it's new
-	            })
-	            .classed('moved', function(d) {
-	                return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].loc, base.entities[d.id].loc);
-	            })
-	            .classed('retagged', function(d) {
-	                return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
-	            })
-	            .call(updateAttributes);
-
-	        // Vertices with icons get a `use`.
-	        var iconUse = groups
-	            .selectAll('.icon')
-	            .data(function data(d) { return zoom >= 17 && getIcon(d) ? [d] : []; }, fastEntityKey);
-
-	        // exit
-	        iconUse.exit()
-	            .remove();
-
-	        // enter
-	        iconUse.enter()
-	            .append('use')
-	            .attr('class', 'icon')
-	            .attr('width', '11px')
-	            .attr('height', '11px')
-	            .attr('transform', 'translate(-5.5, -5.5)')
-	            .attr('xlink:href', function(d) {
-	                var picon = getIcon(d);
-	                var isMaki = /^maki-/.test(picon);
-	                return '#' + picon + (isMaki ? '-11' : '');
-	            });
+	      if (!context.features().isHiddenFeature(entity, graph, geometry)) {
+	        var i;
 
+	        if (entity.type === 'way') {
+	          for (i = 0; i < entity.nodes.length; i++) {
+	            var child = graph.hasEntity(entity.nodes[i]);
 
-	        // Vertices with directions get viewfields
-	        var dgroups = groups
-	            .selectAll('.viewfieldgroup')
-	            .data(function data(d) { return zoom >= 18 && getDirections(d) ? [d] : []; }, fastEntityKey);
-
-	        // exit
-	        dgroups.exit()
-	            .remove();
-
-	        // enter/update
-	        dgroups = dgroups.enter()
-	            .insert('g', '.shadow')
-	            .attr('class', 'viewfieldgroup')
-	            .merge(dgroups);
-
-	        var viewfields = dgroups.selectAll('.viewfield')
-	            .data(getDirections, function key(d) { return osmEntity.key(d); });
-
-	        // exit
-	        viewfields.exit()
-	            .remove();
-
-	        // enter/update
-	        viewfields.enter()
-	            .append('path')
-	            .attr('class', 'viewfield')
-	            .attr('d', 'M0,0H0')
-	            .merge(viewfields)
-	            .attr('marker-start', 'url(#ideditor-viewfield-marker' + (wireframe ? '-wireframe' : '') + ')')
-	            .attr('transform', function(d) { return 'rotate(' + d + ')'; });
-	    }
-
-
-	    function drawTargets(selection, graph, entities, filter) {
-	        var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-	        var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
-	        var getTransform = svgPointTransform(projection).geojson;
-	        var activeID = context.activeID();
-	        var data = { targets: [], nopes: [] };
-
-	        entities.forEach(function(node) {
-	            if (activeID === node.id) { return; }   // draw no target on the activeID
-
-	            var vertexType = svgPassiveVertex(node, graph, activeID);
-	            if (vertexType !== 0) {     // passive or adjacent - allow to connect
-	                data.targets.push({
-	                    type: 'Feature',
-	                    id: node.id,
-	                    properties: {
-	                        target: true,
-	                        entity: node
-	                    },
-	                    geometry: node.asGeoJSON()
-	                });
-	            } else {
-	                data.nopes.push({
-	                    type: 'Feature',
-	                    id: node.id + '-nope',
-	                    properties: {
-	                        nope: true,
-	                        target: true,
-	                        entity: node
-	                    },
-	                    geometry: node.asGeoJSON()
-	                });
+	            if (child) {
+	              addChildVertices(child);
 	            }
-	        });
+	          }
+	        } else if (entity.type === 'relation') {
+	          for (i = 0; i < entity.members.length; i++) {
+	            var member = graph.hasEntity(entity.members[i].id);
 
-	        // Targets allow hover and vertex snapping
-	        var targets = selection.selectAll('.vertex.target-allowed')
-	            .filter(function(d) { return filter(d.properties.entity); })
-	            .data(data.targets, function key(d) { return d.id; });
-
-	        // exit
-	        targets.exit()
-	            .remove();
-
-	        // enter/update
-	        targets.enter()
-	            .append('circle')
-	            .attr('r', function(d) {
-	                return _radii[d.id]
-	                  || radiuses.shadow[3];
-	            })
-	            .merge(targets)
-	            .attr('class', function(d) {
-	                return 'node vertex target target-allowed '
-	                + targetClass + d.id;
-	            })
-	            .attr('transform', getTransform);
-
-
-	        // NOPE
-	        var nopes = selection.selectAll('.vertex.target-nope')
-	            .filter(function(d) { return filter(d.properties.entity); })
-	            .data(data.nopes, function key(d) { return d.id; });
-
-	        // exit
-	        nopes.exit()
-	            .remove();
-
-	        // enter/update
-	        nopes.enter()
-	            .append('circle')
-	            .attr('r', function(d) { return (_radii[d.properties.entity.id] || radiuses.shadow[3]); })
-	            .merge(nopes)
-	            .attr('class', function(d) { return 'node vertex target target-nope ' + nopeClass + d.id; })
-	            .attr('transform', getTransform);
-	    }
-
-
-	    // Points can also render as vertices:
-	    // 1. in wireframe mode or
-	    // 2. at higher zooms if they have a direction
-	    function renderAsVertex(entity, graph, wireframe, zoom) {
-	        var geometry = entity.geometry(graph);
-	        return geometry === 'vertex' || (geometry === 'point' && (
-	            wireframe || (zoom >= 18 && entity.directions(graph, projection).length)
-	        ));
-	    }
-
-
-	    function isEditedNode(node, base, head) {
-	        var baseNode = base.entities[node.id];
-	        var headNode = head.entities[node.id];
-	        return !headNode ||
-	            !baseNode ||
-	            !fastDeepEqual(headNode.tags, baseNode.tags) ||
-	            !fastDeepEqual(headNode.loc, baseNode.loc);
-	    }
-
-
-	    function getSiblingAndChildVertices(ids, graph, wireframe, zoom) {
-	        var results = {};
-
-	        var seenIds = {};
-
-	        function addChildVertices(entity) {
-
-	            // avoid redundant work and infinite recursion of circular relations
-	            if (seenIds[entity.id]) { return; }
-	            seenIds[entity.id] = true;
-
-	            var geometry = entity.geometry(graph);
-	            if (!context.features().isHiddenFeature(entity, graph, geometry)) {
-	                var i;
-	                if (entity.type === 'way') {
-	                    for (i = 0; i < entity.nodes.length; i++) {
-	                        var child = graph.hasEntity(entity.nodes[i]);
-	                        if (child) {
-	                            addChildVertices(child);
-	                        }
-	                    }
-	                } else if (entity.type === 'relation') {
-	                    for (i = 0; i < entity.members.length; i++) {
-	                        var member = graph.hasEntity(entity.members[i].id);
-	                        if (member) {
-	                            addChildVertices(member);
-	                        }
-	                    }
-	                } else if (renderAsVertex(entity, graph, wireframe, zoom)) {
-	                    results[entity.id] = entity;
-	                }
+	            if (member) {
+	              addChildVertices(member);
 	            }
+	          }
+	        } else if (renderAsVertex(entity, graph, wireframe, zoom)) {
+	          results[entity.id] = entity;
 	        }
+	      }
+	    }
 
-	        ids.forEach(function(id) {
-	            var entity = graph.hasEntity(id);
-	            if (!entity) { return; }
-
-	            if (entity.type === 'node') {
-	                if (renderAsVertex(entity, graph, wireframe, zoom)) {
-	                    results[entity.id] = entity;
-	                    graph.parentWays(entity).forEach(function(entity) {
-	                        addChildVertices(entity);
-	                    });
-	                }
-	            } else {  // way, relation
-	                addChildVertices(entity);
-	            }
-	        });
+	    ids.forEach(function (id) {
+	      var entity = graph.hasEntity(id);
+	      if (!entity) return;
 
-	        return results;
-	    }
+	      if (entity.type === 'node') {
+	        if (renderAsVertex(entity, graph, wireframe, zoom)) {
+	          results[entity.id] = entity;
+	          graph.parentWays(entity).forEach(function (entity) {
+	            addChildVertices(entity);
+	          });
+	        }
+	      } else {
+	        // way, relation
+	        addChildVertices(entity);
+	      }
+	    });
+	    return results;
+	  }
 
+	  function drawVertices(selection, graph, entities, filter, extent, fullRedraw) {
+	    var wireframe = context.surface().classed('fill-wireframe');
+	    var visualDiff = context.surface().classed('highlight-edited');
+	    var zoom = geoScaleToZoom(projection.scale());
+	    var mode = context.mode();
+	    var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
+	    var base = context.history().base();
+	    var drawLayer = selection.selectAll('.layer-osm.points .points-group.vertices');
+	    var touchLayer = selection.selectAll('.layer-touch.points');
+
+	    if (fullRedraw) {
+	      _currPersistent = {};
+	      _radii = {};
+	    } // Collect important vertices from the `entities` list..
+	    // (during a partial redraw, it will not contain everything)
+
+
+	    for (var i = 0; i < entities.length; i++) {
+	      var entity = entities[i];
+	      var geometry = entity.geometry(graph);
+	      var keep = false; // a point that looks like a vertex..
+
+	      if (geometry === 'point' && renderAsVertex(entity, graph, wireframe, zoom)) {
+	        _currPersistent[entity.id] = entity;
+	        keep = true; // a vertex of some importance..
+	      } else if (geometry === 'vertex' && (entity.hasInterestingTags() || entity.isEndpoint(graph) || entity.isConnected(graph) || visualDiff && isEditedNode(entity, base, graph))) {
+	        _currPersistent[entity.id] = entity;
+	        keep = true;
+	      } // whatever this is, it's not a persistent vertex..
+
+
+	      if (!keep && !fullRedraw) {
+	        delete _currPersistent[entity.id];
+	      }
+	    } // 3 sets of vertices to consider:
 
-	    function drawVertices(selection, graph, entities, filter, extent, fullRedraw) {
-	        var wireframe = context.surface().classed('fill-wireframe');
-	        var visualDiff = context.surface().classed('highlight-edited');
-	        var zoom = geoScaleToZoom(projection.scale());
-	        var mode = context.mode();
-	        var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
-	        var base = context.history().base();
-
-	        var drawLayer = selection.selectAll('.layer-osm.points .points-group.vertices');
-	        var touchLayer = selection.selectAll('.layer-touch.points');
-
-	        if (fullRedraw) {
-	            _currPersistent = {};
-	            _radii = {};
-	        }
-
-	        // Collect important vertices from the `entities` list..
-	        // (during a partial redraw, it will not contain everything)
-	        for (var i = 0; i < entities.length; i++) {
-	            var entity = entities[i];
-	            var geometry = entity.geometry(graph);
-	            var keep = false;
-
-	            // a point that looks like a vertex..
-	            if ((geometry === 'point') && renderAsVertex(entity, graph, wireframe, zoom)) {
-	                _currPersistent[entity.id] = entity;
-	                keep = true;
-
-	            // a vertex of some importance..
-	            } else if (geometry === 'vertex' &&
-	                (entity.hasInterestingTags() || entity.isEndpoint(graph) || entity.isConnected(graph)
-	                || (visualDiff && isEditedNode(entity, base, graph)))) {
-	                _currPersistent[entity.id] = entity;
-	                keep = true;
-	            }
 
-	            // whatever this is, it's not a persistent vertex..
-	            if (!keep && !fullRedraw) {
-	                delete _currPersistent[entity.id];
-	            }
-	        }
+	    var sets = {
+	      persistent: _currPersistent,
+	      // persistent = important vertices (render always)
+	      selected: _currSelected,
+	      // selected + siblings of selected (render always)
+	      hovered: _currHover // hovered + siblings of hovered (render only in draw modes)
 
-	        // 3 sets of vertices to consider:
-	        var sets = {
-	            persistent: _currPersistent,  // persistent = important vertices (render always)
-	            selected: _currSelected,      // selected + siblings of selected (render always)
-	            hovered: _currHover           // hovered + siblings of hovered (render only in draw modes)
-	        };
+	    };
+	    var all = Object.assign({}, isMoving ? _currHover : {}, _currSelected, _currPersistent); // Draw the vertices..
+	    // The filter function controls the scope of what objects d3 will touch (exit/enter/update)
+	    // Adjust the filter function to expand the scope beyond whatever entities were passed in.
 
-	        var all = Object.assign({}, (isMoving ? _currHover : {}), _currSelected, _currPersistent);
+	    var filterRendered = function filterRendered(d) {
+	      return d.id in _currPersistent || d.id in _currSelected || d.id in _currHover || filter(d);
+	    };
 
-	        // Draw the vertices..
-	        // The filter function controls the scope of what objects d3 will touch (exit/enter/update)
-	        // Adjust the filter function to expand the scope beyond whatever entities were passed in.
-	        var filterRendered = function(d) {
-	            return d.id in _currPersistent || d.id in _currSelected || d.id in _currHover || filter(d);
-	        };
-	        drawLayer
-	            .call(draw, graph, currentVisible(all), sets, filterRendered);
+	    drawLayer.call(draw, graph, currentVisible(all), sets, filterRendered); // Draw touch targets..
+	    // When drawing, render all targets (not just those affected by a partial redraw)
 
-	        // Draw touch targets..
-	        // When drawing, render all targets (not just those affected by a partial redraw)
-	        var filterTouch = function(d) {
-	            return isMoving ? true : filterRendered(d);
-	        };
-	        touchLayer
-	            .call(drawTargets, graph, currentVisible(all), filterTouch);
+	    var filterTouch = function filterTouch(d) {
+	      return isMoving ? true : filterRendered(d);
+	    };
 
+	    touchLayer.call(drawTargets, graph, currentVisible(all), filterTouch);
 
-	        function currentVisible(which) {
-	            return Object.keys(which)
-	                .map(graph.hasEntity, graph)     // the current version of this entity
-	                .filter(function (entity) { return entity && entity.intersects(extent, graph); });
-	        }
+	    function currentVisible(which) {
+	      return Object.keys(which).map(graph.hasEntity, graph) // the current version of this entity
+	      .filter(function (entity) {
+	        return entity && entity.intersects(extent, graph);
+	      });
 	    }
+	  } // partial redraw - only update the selected items..
 
 
-	    // partial redraw - only update the selected items..
-	    drawVertices.drawSelected = function(selection, graph, extent) {
-	        var wireframe = context.surface().classed('fill-wireframe');
-	        var zoom = geoScaleToZoom(projection.scale());
-
-	        _prevSelected = _currSelected || {};
-	        if (context.map().isInWideSelection()) {
-	            _currSelected = {};
-	            context.selectedIDs().forEach(function(id) {
-	                var entity = graph.hasEntity(id);
-	                if (!entity) { return; }
+	  drawVertices.drawSelected = function (selection, graph, extent) {
+	    var wireframe = context.surface().classed('fill-wireframe');
+	    var zoom = geoScaleToZoom(projection.scale());
+	    _prevSelected = _currSelected || {};
 
-	                if (entity.type === 'node') {
-	                    if (renderAsVertex(entity, graph, wireframe, zoom)) {
-	                        _currSelected[entity.id] = entity;
-	                    }
-	                }
-	            });
+	    if (context.map().isInWideSelection()) {
+	      _currSelected = {};
+	      context.selectedIDs().forEach(function (id) {
+	        var entity = graph.hasEntity(id);
+	        if (!entity) return;
 
-	        } else {
-	            _currSelected = getSiblingAndChildVertices(context.selectedIDs(), graph, wireframe, zoom);
+	        if (entity.type === 'node') {
+	          if (renderAsVertex(entity, graph, wireframe, zoom)) {
+	            _currSelected[entity.id] = entity;
+	          }
 	        }
+	      });
+	    } else {
+	      _currSelected = getSiblingAndChildVertices(context.selectedIDs(), graph, wireframe, zoom);
+	    } // note that drawVertices will add `_currSelected` automatically if needed..
+
 
-	        // note that drawVertices will add `_currSelected` automatically if needed..
-	        var filter = function(d) { return d.id in _prevSelected; };
-	        drawVertices(selection, graph, Object.values(_prevSelected), filter, extent, false);
+	    var filter = function filter(d) {
+	      return d.id in _prevSelected;
 	    };
 
+	    drawVertices(selection, graph, Object.values(_prevSelected), filter, extent, false);
+	  }; // partial redraw - only update the hovered items..
 
-	    // partial redraw - only update the hovered items..
-	    drawVertices.drawHover = function(selection, graph, target, extent) {
-	        if (target === _currHoverTarget) { return; }  // continue only if something changed
 
-	        var wireframe = context.surface().classed('fill-wireframe');
-	        var zoom = geoScaleToZoom(projection.scale());
+	  drawVertices.drawHover = function (selection, graph, target, extent) {
+	    if (target === _currHoverTarget) return; // continue only if something changed
 
-	        _prevHover = _currHover || {};
-	        _currHoverTarget = target;
-	        var entity = target && target.properties && target.properties.entity;
+	    var wireframe = context.surface().classed('fill-wireframe');
+	    var zoom = geoScaleToZoom(projection.scale());
+	    _prevHover = _currHover || {};
+	    _currHoverTarget = target;
+	    var entity = target && target.properties && target.properties.entity;
 
-	        if (entity) {
-	            _currHover = getSiblingAndChildVertices([entity.id], graph, wireframe, zoom);
-	        } else {
-	            _currHover = {};
-	        }
+	    if (entity) {
+	      _currHover = getSiblingAndChildVertices([entity.id], graph, wireframe, zoom);
+	    } else {
+	      _currHover = {};
+	    } // note that drawVertices will add `_currHover` automatically if needed..
 
-	        // note that drawVertices will add `_currHover` automatically if needed..
-	        var filter = function(d) { return d.id in _prevHover; };
-	        drawVertices(selection, graph, Object.values(_prevHover), filter, extent, false);
+
+	    var filter = function filter(d) {
+	      return d.id in _prevHover;
 	    };
 
-	    return drawVertices;
+	    drawVertices(selection, graph, Object.values(_prevHover), filter, extent, false);
+	  };
+
+	  return drawVertices;
 	}
 
 	function utilBindOnce(target, type, listener, capture) {
-	    var typeOnce = type + '.once';
-	    function one() {
-	        target.on(typeOnce, null);
-	        listener.apply(this, arguments);
-	    }
-	    target.on(typeOnce, one, capture);
-	    return this;
-	}
+	  var typeOnce = type + '.once';
 
-	// Adapted from d3-zoom to handle pointer events.
+	  function one() {
+	    target.on(typeOnce, null);
+	    listener.apply(this, arguments);
+	  }
 
-	// Ignore right-click, since that should open the context menu.
-	function defaultFilter$2() {
-	  return !event.ctrlKey && !event.button;
+	  target.on(typeOnce, one, capture);
+	  return this;
 	}
 
-	function defaultExtent$1() {
+	function defaultFilter(d3_event) {
+	  return !d3_event.ctrlKey && !d3_event.button;
+	}
+
+	function defaultExtent() {
 	  var e = this;
+
 	  if (e instanceof SVGElement) {
 	    e = e.ownerSVGElement || e;
+
 	    if (e.hasAttribute('viewBox')) {
 	      e = e.viewBox.baseVal;
 	      return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
 	    }
+
 	    return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
 	  }
+
 	  return [[0, 0], [e.clientWidth, e.clientHeight]];
 	}
 
-	function defaultWheelDelta$1() {
-	  return -event.deltaY * (event.deltaMode === 1 ? 0.05 : event.deltaMode ? 1 : 0.002);
+	function defaultWheelDelta(d3_event) {
+	  return -d3_event.deltaY * (d3_event.deltaMode === 1 ? 0.05 : d3_event.deltaMode ? 1 : 0.002);
 	}
 
-	function defaultConstrain$1(transform, extent, translateExtent) {
+	function defaultConstrain(transform, extent, translateExtent) {
 	  var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],
 	      dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],
 	      dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],
 	      dy1 = transform.invertY(extent[1][1]) - translateExtent[1][1];
-	  return transform.translate(
-	    dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1),
-	    dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1)
-	  );
+	  return transform.translate(dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1), dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1));
 	}
 
 	function utilZoomPan() {
-	  var filter = defaultFilter$2,
-	      extent = defaultExtent$1,
-	      constrain = defaultConstrain$1,
-	      wheelDelta = defaultWheelDelta$1,
+	  var filter = defaultFilter,
+	      extent = defaultExtent,
+	      constrain = defaultConstrain,
+	      wheelDelta = defaultWheelDelta,
 	      scaleExtent = [0, Infinity],
 	      translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
 	      interpolate = interpolateZoom,
-	      listeners = dispatch('start', 'zoom', 'end'),
+	      dispatch = dispatch$8('start', 'zoom', 'end'),
 	      _wheelDelay = 150,
 	      _transform = identity$2,
 	      _activeGesture;
 
 	  function zoom(selection) {
-	    selection
-	        .on('pointerdown.zoom', pointerdown)
-	        .on('wheel.zoom', wheeled)
-	        .style('touch-action', 'none')
-	        .style('-webkit-tap-highlight-color', 'rgba(0,0,0,0)');
-
-	    select(window)
-	        .on('pointermove.zoompan', pointermove)
-	        .on('pointerup.zoompan pointercancel.zoompan', pointerup);
+	    selection.on('pointerdown.zoom', pointerdown).on('wheel.zoom', wheeled).style('touch-action', 'none').style('-webkit-tap-highlight-color', 'rgba(0,0,0,0)');
+	    select(window).on('pointermove.zoompan', pointermove).on('pointerup.zoompan pointercancel.zoompan', pointerup);
 	  }
 
-	  zoom.transform = function(collection, transform, point) {
+	  zoom.transform = function (collection, transform, point) {
 	    var selection = collection.selection ? collection.selection() : collection;
+
 	    if (collection !== selection) {
 	      schedule(collection, transform, point);
 	    } else {
-	      selection.interrupt().each(function() {
-	        gesture(this, arguments)
-	            .start()
-	            .zoom(null, typeof transform === 'function' ? transform.apply(this, arguments) : transform)
-	            .end();
+	      selection.interrupt().each(function () {
+	        gesture(this, arguments).start(null).zoom(null, null, typeof transform === 'function' ? transform.apply(this, arguments) : transform).end(null);
 	      });
 	    }
 	  };
 
-	  zoom.scaleBy = function(selection, k, p) {
-	    zoom.scaleTo(selection, function() {
+	  zoom.scaleBy = function (selection, k, p) {
+	    zoom.scaleTo(selection, function () {
 	      var k0 = _transform.k,
 	          k1 = typeof k === 'function' ? k.apply(this, arguments) : k;
 	      return k0 * k1;
 	    }, p);
 	  };
 
-	  zoom.scaleTo = function(selection, k, p) {
-	    zoom.transform(selection, function() {
+	  zoom.scaleTo = function (selection, k, p) {
+	    zoom.transform(selection, function () {
 	      var e = extent.apply(this, arguments),
 	          t0 = _transform,
-	          p0 = p == null ? centroid(e) : typeof p === 'function' ? p.apply(this, arguments) : p,
+	          p0 = !p ? centroid(e) : typeof p === 'function' ? p.apply(this, arguments) : p,
 	          p1 = t0.invert(p0),
 	          k1 = typeof k === 'function' ? k.apply(this, arguments) : k;
 	      return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);
 	    }, p);
 	  };
 
-	  zoom.translateBy = function(selection, x, y) {
-	    zoom.transform(selection, function() {
-	      return constrain(_transform.translate(
-	        typeof x === 'function' ? x.apply(this, arguments) : x,
-	        typeof y === 'function' ? y.apply(this, arguments) : y
-	      ), extent.apply(this, arguments), translateExtent);
+	  zoom.translateBy = function (selection, x, y) {
+	    zoom.transform(selection, function () {
+	      return constrain(_transform.translate(typeof x === 'function' ? x.apply(this, arguments) : x, typeof y === 'function' ? y.apply(this, arguments) : y), extent.apply(this, arguments), translateExtent);
 	    });
 	  };
 
-	  zoom.translateTo = function(selection, x, y, p) {
-	    zoom.transform(selection, function() {
+	  zoom.translateTo = function (selection, x, y, p) {
+	    zoom.transform(selection, function () {
 	      var e = extent.apply(this, arguments),
 	          t = _transform,
-	          p0 = p == null ? centroid(e) : typeof p === 'function' ? p.apply(this, arguments) : p;
-	      return constrain(identity$2.translate(p0[0], p0[1]).scale(t.k).translate(
-	        typeof x === 'function' ? -x.apply(this, arguments) : -x,
-	        typeof y === 'function' ? -y.apply(this, arguments) : -y
-	      ), e, translateExtent);
+	          p0 = !p ? centroid(e) : typeof p === 'function' ? p.apply(this, arguments) : p;
+	      return constrain(identity$2.translate(p0[0], p0[1]).scale(t.k).translate(typeof x === 'function' ? -x.apply(this, arguments) : -x, typeof y === 'function' ? -y.apply(this, arguments) : -y), e, translateExtent);
 	    }, p);
 	  };
 
@@ -73004,7 +68529,8 @@
 	  }
 
 	  function translate(transform, p0, p1) {
-	    var x = p0[0] - p1[0] * transform.k, y = p0[1] - p1[1] * transform.k;
+	    var x = p0[0] - p1[0] * transform.k,
+	        y = p0[1] - p1[1] * transform.k;
 	    return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
 	  }
 
@@ -73013,29 +68539,37 @@
 	  }
 
 	  function schedule(transition, transform, point) {
-	    transition
-	        .on('start.zoom', function() { gesture(this, arguments).start(); })
-	        .on('interrupt.zoom end.zoom', function() { gesture(this, arguments).end(); })
-	        .tween('zoom', function() {
-	          var that = this,
-	              args = arguments,
-	              g = gesture(that, args),
-	              e = extent.apply(that, args),
-	              p = point == null ? centroid(e) : typeof point === 'function' ? point.apply(that, args) : point,
-	              w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
-	              a = _transform,
-	              b = typeof transform === 'function' ? transform.apply(that, args) : transform,
-	              i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
-	          return function(t) {
-	            if (t === 1) { t = b; } // Avoid rounding error on end.
-	            else { var l = i(t), k = w / l[2]; t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k); }
-	            g.zoom(null, t);
-	          };
-	        });
+	    transition.on('start.zoom', function () {
+	      gesture(this, arguments).start(null);
+	    }).on('interrupt.zoom end.zoom', function () {
+	      gesture(this, arguments).end(null);
+	    }).tween('zoom', function () {
+	      var that = this,
+	          args = arguments,
+	          g = gesture(that, args),
+	          e = extent.apply(that, args),
+	          p = !point ? centroid(e) : typeof point === 'function' ? point.apply(that, args) : point,
+	          w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
+	          a = _transform,
+	          b = typeof transform === 'function' ? transform.apply(that, args) : transform,
+	          i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
+	      return function (t) {
+	        if (t === 1) {
+	          // Avoid rounding error on end.
+	          t = b;
+	        } else {
+	          var l = i(t);
+	          var k = w / l[2];
+	          t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k);
+	        }
+
+	        g.zoom(null, null, t);
+	      };
+	    });
 	  }
 
 	  function gesture(that, args, clean) {
-	    return (!clean && _activeGesture) || new Gesture(that, args);
+	    return !clean && _activeGesture || new Gesture(that, args);
 	  }
 
 	  function Gesture(that, args) {
@@ -73046,127 +68580,123 @@
 	  }
 
 	  Gesture.prototype = {
-	    start: function() {
+	    start: function start(d3_event) {
 	      if (++this.active === 1) {
 	        _activeGesture = this;
-	        this.emit('start');
+	        dispatch.call('start', this, d3_event);
 	      }
+
 	      return this;
 	    },
-	    zoom: function(key, transform) {
-	      if (this.mouse && key !== 'mouse') { this.mouse[1] = transform.invert(this.mouse[0]); }
-	      if (this.pointer0 && key !== 'touch') { this.pointer0[1] = transform.invert(this.pointer0[0]); }
-	      if (this.pointer1 && key !== 'touch') { this.pointer1[1] = transform.invert(this.pointer1[0]); }
+	    zoom: function zoom(d3_event, key, transform) {
+	      if (this.mouse && key !== 'mouse') this.mouse[1] = transform.invert(this.mouse[0]);
+	      if (this.pointer0 && key !== 'touch') this.pointer0[1] = transform.invert(this.pointer0[0]);
+	      if (this.pointer1 && key !== 'touch') this.pointer1[1] = transform.invert(this.pointer1[0]);
 	      _transform = transform;
-	      this.emit('zoom');
+	      dispatch.call('zoom', this, d3_event, key, transform);
 	      return this;
 	    },
-	    end: function() {
+	    end: function end(d3_event) {
 	      if (--this.active === 0) {
 	        _activeGesture = null;
-	        this.emit('end');
+	        dispatch.call('end', this, d3_event);
 	      }
+
 	      return this;
-	    },
-	    emit: function(type) {
-	      customEvent(new ZoomEvent(zoom, type, _transform), listeners.apply, listeners, [type, this.that, this.args]);
 	    }
 	  };
 
-	  function wheeled() {
-	    if (!filter.apply(this, arguments)) { return; }
+	  function wheeled(d3_event) {
+	    if (!filter.apply(this, arguments)) return;
 	    var g = gesture(this, arguments),
 	        t = _transform,
 	        k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], t.k * Math.pow(2, wheelDelta.apply(this, arguments)))),
-	        p = utilFastMouse(this)(event);
-
-	    // If the mouse is in the same location as before, reuse it.
+	        p = utilFastMouse(this)(d3_event); // If the mouse is in the same location as before, reuse it.
 	    // If there were recent wheel events, reset the wheel idle timeout.
+
 	    if (g.wheel) {
 	      if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
 	        g.mouse[1] = t.invert(g.mouse[0] = p);
 	      }
-	      clearTimeout(g.wheel);
 
-	    // Otherwise, capture the mouse point and location at the start.
+	      clearTimeout(g.wheel); // Otherwise, capture the mouse point and location at the start.
 	    } else {
 	      g.mouse = [p, t.invert(p)];
 	      interrupt(this);
-	      g.start();
+	      g.start(d3_event);
 	    }
 
-	    event.preventDefault();
-	    event.stopImmediatePropagation();
+	    d3_event.preventDefault();
+	    d3_event.stopImmediatePropagation();
 	    g.wheel = setTimeout(wheelidled, _wheelDelay);
-	    g.zoom('mouse', constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));
+	    g.zoom(d3_event, 'mouse', constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));
 
 	    function wheelidled() {
 	      g.wheel = null;
-	      g.end();
+	      g.end(d3_event);
 	    }
 	  }
 
 	  var _downPointerIDs = new Set();
-	  var _pointerLocGetter;
 
-	  function pointerdown() {
-	    _downPointerIDs.add(event.pointerId);
+	  var _pointerLocGetter;
 
-	    if (!filter.apply(this, arguments)) { return; }
+	  function pointerdown(d3_event) {
+	    _downPointerIDs.add(d3_event.pointerId);
 
+	    if (!filter.apply(this, arguments)) return;
 	    var g = gesture(this, arguments, _downPointerIDs.size === 1);
 	    var started;
-
-	    event.stopImmediatePropagation();
+	    d3_event.stopImmediatePropagation();
 	    _pointerLocGetter = utilFastMouse(this);
-	    var loc = _pointerLocGetter(event);
-	    var p = [loc, _transform.invert(loc), event.pointerId];
-	    if (!g.pointer0) {
-	       g.pointer0 = p;
-	       started = true;
 
+	    var loc = _pointerLocGetter(d3_event);
+
+	    var p = [loc, _transform.invert(loc), d3_event.pointerId];
+
+	    if (!g.pointer0) {
+	      g.pointer0 = p;
+	      started = true;
 	    } else if (!g.pointer1 && g.pointer0[2] !== p[2]) {
-	       g.pointer1 = p;
+	      g.pointer1 = p;
 	    }
 
 	    if (started) {
 	      interrupt(this);
-	      g.start();
+	      g.start(d3_event);
 	    }
 	  }
 
-	  function pointermove() {
-	    if (!_downPointerIDs.has(event.pointerId)) { return; }
-
-	    if (!_activeGesture || !_pointerLocGetter) { return; }
-
+	  function pointermove(d3_event) {
+	    if (!_downPointerIDs.has(d3_event.pointerId)) return;
+	    if (!_activeGesture || !_pointerLocGetter) return;
 	    var g = gesture(this, arguments);
+	    var isPointer0 = g.pointer0 && g.pointer0[2] === d3_event.pointerId;
+	    var isPointer1 = !isPointer0 && g.pointer1 && g.pointer1[2] === d3_event.pointerId;
 
-	    var isPointer0 = g.pointer0 && g.pointer0[2] === event.pointerId;
-	    var isPointer1 = !isPointer0 && g.pointer1 && g.pointer1[2] === event.pointerId;
-
-	    if ((isPointer0 || isPointer1) && 'buttons' in event && !event.buttons) {
+	    if ((isPointer0 || isPointer1) && 'buttons' in d3_event && !d3_event.buttons) {
 	      // The pointer went up without ending the gesture somehow, e.g.
 	      // a down mouse was moved off the map and released. End it here.
-	      if (g.pointer0) { _downPointerIDs.delete(g.pointer0[2]); }
-	      if (g.pointer1) { _downPointerIDs.delete(g.pointer1[2]); }
-	      g.end();
+	      if (g.pointer0) _downPointerIDs["delete"](g.pointer0[2]);
+	      if (g.pointer1) _downPointerIDs["delete"](g.pointer1[2]);
+	      g.end(d3_event);
 	      return;
 	    }
 
-	    event.preventDefault();
-	    event.stopImmediatePropagation();
-
-	    var loc = _pointerLocGetter(event);
-	    var t, p, l;
+	    d3_event.preventDefault();
+	    d3_event.stopImmediatePropagation();
 
-	    if (isPointer0) { g.pointer0[0] = loc; }
-	    else if (isPointer1) { g.pointer1[0] = loc; }
+	    var loc = _pointerLocGetter(d3_event);
 
+	    var t, p, l;
+	    if (isPointer0) g.pointer0[0] = loc;else if (isPointer1) g.pointer1[0] = loc;
 	    t = _transform;
+
 	    if (g.pointer1) {
-	      var p0 = g.pointer0[0], l0 = g.pointer0[1],
-	          p1 = g.pointer1[0], l1 = g.pointer1[1],
+	      var p0 = g.pointer0[0],
+	          l0 = g.pointer0[1],
+	          p1 = g.pointer1[0],
+	          l1 = g.pointer1[1],
 	          dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
 	          dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
 	      t = scale(t, Math.sqrt(dp / dl));
@@ -73175,8972 +68705,9325 @@
 	    } else if (g.pointer0) {
 	      p = g.pointer0[0];
 	      l = g.pointer0[1];
+	    } else {
+	      return;
 	    }
-	    else { return; }
-	    g.zoom('touch', constrain(translate(t, p, l), g.extent, translateExtent));
-	  }
 
-	  function pointerup() {
-	    if (!_downPointerIDs.has(event.pointerId)) { return; }
+	    g.zoom(d3_event, 'touch', constrain(translate(t, p, l), g.extent, translateExtent));
+	  }
 
-	    _downPointerIDs.delete(event.pointerId);
+	  function pointerup(d3_event) {
+	    if (!_downPointerIDs.has(d3_event.pointerId)) return;
 
-	    if (!_activeGesture) { return; }
+	    _downPointerIDs["delete"](d3_event.pointerId);
 
+	    if (!_activeGesture) return;
 	    var g = gesture(this, arguments);
-
-	    event.stopImmediatePropagation();
-
-	    if (g.pointer0 && g.pointer0[2] === event.pointerId) { delete g.pointer0; }
-	    else if (g.pointer1 && g.pointer1[2] === event.pointerId) { delete g.pointer1; }
+	    d3_event.stopImmediatePropagation();
+	    if (g.pointer0 && g.pointer0[2] === d3_event.pointerId) delete g.pointer0;else if (g.pointer1 && g.pointer1[2] === d3_event.pointerId) delete g.pointer1;
 
 	    if (g.pointer1 && !g.pointer0) {
 	      g.pointer0 = g.pointer1;
 	      delete g.pointer1;
 	    }
-	    if (g.pointer0) { g.pointer0[1] = _transform.invert(g.pointer0[0]); }
-	    else {
-	      g.end();
+
+	    if (g.pointer0) {
+	      g.pointer0[1] = _transform.invert(g.pointer0[0]);
+	    } else {
+	      g.end(d3_event);
 	    }
 	  }
 
-	  zoom.wheelDelta = function(_) {
+	  zoom.wheelDelta = function (_) {
 	    return arguments.length ? (wheelDelta = utilFunctor(+_), zoom) : wheelDelta;
 	  };
 
-	  zoom.filter = function(_) {
+	  zoom.filter = function (_) {
 	    return arguments.length ? (filter = utilFunctor(!!_), zoom) : filter;
 	  };
 
-	  zoom.extent = function(_) {
+	  zoom.extent = function (_) {
 	    return arguments.length ? (extent = utilFunctor([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
 	  };
 
-	  zoom.scaleExtent = function(_) {
+	  zoom.scaleExtent = function (_) {
 	    return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
 	  };
 
-	  zoom.translateExtent = function(_) {
+	  zoom.translateExtent = function (_) {
 	    return arguments.length ? (translateExtent[0][0] = +_[0][0], translateExtent[1][0] = +_[1][0], translateExtent[0][1] = +_[0][1], translateExtent[1][1] = +_[1][1], zoom) : [[translateExtent[0][0], translateExtent[0][1]], [translateExtent[1][0], translateExtent[1][1]]];
 	  };
 
-	  zoom.constrain = function(_) {
+	  zoom.constrain = function (_) {
 	    return arguments.length ? (constrain = _, zoom) : constrain;
 	  };
 
-	  zoom.interpolate = function(_) {
+	  zoom.interpolate = function (_) {
 	    return arguments.length ? (interpolate = _, zoom) : interpolate;
 	  };
 
-	  zoom._transform = function(_) {
+	  zoom._transform = function (_) {
 	    return arguments.length ? (_transform = _, zoom) : _transform;
 	  };
 
-	  zoom.on = function() {
-	    var value = listeners.on.apply(listeners, arguments);
-	    return value === listeners ? zoom : value;
-	  };
-
-	  return zoom;
+	  return utilRebind(zoom, dispatch, 'on');
 	}
 
-	// A custom double-click / double-tap event detector that works on touch devices
 	// if pointer events are supported. Falls back to default `dblclick` event.
-	function utilDoubleUp() {
 
-	    var dispatch$1 = dispatch('doubleUp');
+	function utilDoubleUp() {
+	  var dispatch = dispatch$8('doubleUp');
+	  var _maxTimespan = 500; // milliseconds
 
-	    var _maxTimespan = 500; // milliseconds
-	    var _maxDistance = 20; // web pixels; be somewhat generous to account for touch devices
-	    var _pointer; // object representing the pointer that could trigger double up
+	  var _maxDistance = 20; // web pixels; be somewhat generous to account for touch devices
 
-	    function pointerIsValidFor(loc) {
-	        // second pointerup must occur within a small timeframe after the first pointerdown
-	        return new Date().getTime() - _pointer.startTime <= _maxTimespan &&
-	            // all pointer events must occur within a small distance of the first pointerdown
-	            geoVecLength(_pointer.startLoc, loc) <= _maxDistance;
-	    }
+	  var _pointer; // object representing the pointer that could trigger double up
 
-	    function pointerdown() {
 
-	        // ignore right-click
-	        if (event.ctrlKey || event.button === 2) { return; }
+	  function pointerIsValidFor(loc) {
+	    // second pointerup must occur within a small timeframe after the first pointerdown
+	    return new Date().getTime() - _pointer.startTime <= _maxTimespan && // all pointer events must occur within a small distance of the first pointerdown
+	    geoVecLength(_pointer.startLoc, loc) <= _maxDistance;
+	  }
 
-	        var loc = [event.clientX, event.clientY];
+	  function pointerdown(d3_event) {
+	    // ignore right-click
+	    if (d3_event.ctrlKey || d3_event.button === 2) return;
+	    var loc = [d3_event.clientX, d3_event.clientY]; // Don't rely on pointerId here since it can change between pointerdown
+	    // events on touch devices
 
-	        // Don't rely on pointerId here since it can change between pointerdown
-	        // events on touch devices
-	        if (_pointer && !pointerIsValidFor(loc)) {
-	            // if this pointer is no longer valid, clear it so another can be started
-	            _pointer = undefined;
-	        }
+	    if (_pointer && !pointerIsValidFor(loc)) {
+	      // if this pointer is no longer valid, clear it so another can be started
+	      _pointer = undefined;
+	    }
 
-	        if (!_pointer) {
-	            _pointer = {
-	                startLoc: loc,
-	                startTime: new Date().getTime(),
-	                upCount: 0,
-	                pointerId: event.pointerId
-	            };
-	        } else { // double down
-	            _pointer.pointerId = event.pointerId;
-	        }
+	    if (!_pointer) {
+	      _pointer = {
+	        startLoc: loc,
+	        startTime: new Date().getTime(),
+	        upCount: 0,
+	        pointerId: d3_event.pointerId
+	      };
+	    } else {
+	      // double down
+	      _pointer.pointerId = d3_event.pointerId;
 	    }
+	  }
 
-	    function pointerup() {
+	  function pointerup(d3_event) {
+	    // ignore right-click
+	    if (d3_event.ctrlKey || d3_event.button === 2) return;
+	    if (!_pointer || _pointer.pointerId !== d3_event.pointerId) return;
+	    _pointer.upCount += 1;
 
-	        // ignore right-click
-	        if (event.ctrlKey || event.button === 2) { return; }
+	    if (_pointer.upCount === 2) {
+	      // double up!
+	      var loc = [d3_event.clientX, d3_event.clientY];
 
-	        if (!_pointer || _pointer.pointerId !== event.pointerId) { return; }
+	      if (pointerIsValidFor(loc)) {
+	        var locInThis = utilFastMouse(this)(d3_event);
+	        dispatch.call('doubleUp', this, d3_event, locInThis);
+	      } // clear the pointer info in any case
 
-	        _pointer.upCount += 1;
 
-	        if (_pointer.upCount === 2) { // double up!
-	            var loc = [event.clientX, event.clientY];
-	            if (pointerIsValidFor(loc)) {
-	                var locInThis = utilFastMouse(this)(event);
-	                dispatch$1.call('doubleUp', this, locInThis);
-	            }
-	            // clear the pointer info in any case
-	            _pointer = undefined;
-	        }
+	      _pointer = undefined;
 	    }
+	  }
 
-	    function doubleUp(selection) {
-	        if ('PointerEvent' in window) {
-	            // dblclick isn't well supported on touch devices so manually use
-	            // pointer events if they're available
-	            selection
-	                .on('pointerdown.doubleUp', pointerdown)
-	                .on('pointerup.doubleUp', pointerup);
-	        } else {
-	            // fallback to dblclick
-	            selection
-	                .on('dblclick.doubleUp', function() {
-	                    dispatch$1.call('doubleUp', this, utilFastMouse(this)(event));
-	                });
-	        }
+	  function doubleUp(selection) {
+	    if ('PointerEvent' in window) {
+	      // dblclick isn't well supported on touch devices so manually use
+	      // pointer events if they're available
+	      selection.on('pointerdown.doubleUp', pointerdown).on('pointerup.doubleUp', pointerup);
+	    } else {
+	      // fallback to dblclick
+	      selection.on('dblclick.doubleUp', function (d3_event) {
+	        dispatch.call('doubleUp', this, d3_event, utilFastMouse(this)(d3_event));
+	      });
 	    }
+	  }
 
-	    doubleUp.off = function(selection) {
-	        selection
-	            .on('pointerdown.doubleUp', null)
-	            .on('pointerup.doubleUp', null)
-	            .on('dblclick.doubleUp', null);
-	    };
+	  doubleUp.off = function (selection) {
+	    selection.on('pointerdown.doubleUp', null).on('pointerup.doubleUp', null).on('dblclick.doubleUp', null);
+	  };
 
-	    return utilRebind(doubleUp, dispatch$1, 'on');
+	  return utilRebind(doubleUp, dispatch, 'on');
 	}
 
-	// constants
 	var TILESIZE = 256;
-	var minZoom = 2;
-	var maxZoom = 24;
-	var kMin = geoZoomToScale(minZoom, TILESIZE);
-	var kMax = geoZoomToScale(maxZoom, TILESIZE);
-
-	function clamp(num, min, max) {
-	    return Math.max(min, Math.min(num, max));
-	}
-
-
-	function rendererMap(context) {
-	    var dispatch$1 = dispatch(
-	        'move', 'drawn',
-	        'crossEditableZoom', 'hitMinZoom',
-	        'changeHighlighting', 'changeAreaFill'
-	    );
-	    var projection = context.projection;
-	    var curtainProjection = context.curtainProjection;
-	    var drawLayers;
-	    var drawPoints;
-	    var drawVertices;
-	    var drawLines;
-	    var drawAreas;
-	    var drawMidpoints;
-	    var drawLabels;
-
-	    var _selection = select(null);
-	    var supersurface = select(null);
-	    var wrapper = select(null);
-	    var surface = select(null);
-
-	    var _dimensions = [1, 1];
-	    var _dblClickZoomEnabled = true;
-	    var _redrawEnabled = true;
-	    var _gestureTransformStart;
-	    var _transformStart = projection.transform();
-	    var _transformLast;
-	    var _isTransformed = false;
-	    var _minzoom = 0;
-	    var _getMouseCoords;
-	    var _lastPointerEvent;
-	    var _lastWithinEditableZoom;
-
-	    // whether a pointerdown event started the zoom
-	    var _pointerDown = false;
-
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
-
-	    // use pointer event interaction if supported; fallback to touch/mouse events in d3-zoom
-	    var _zoomerPannerFunction = 'PointerEvent' in window ? utilZoomPan : d3_zoom;
-
-	    var _zoomerPanner = _zoomerPannerFunction()
-	        .scaleExtent([kMin, kMax])
-	        .interpolate(interpolate)
-	        .filter(zoomEventFilter)
-	        .on('zoom.map', zoomPan)
-	        .on('start.map', function() {
-	            _pointerDown = event.sourceEvent && event.sourceEvent.type === 'pointerdown';
-	        })
-	        .on('end.map', function() {
-	            _pointerDown = false;
-	        });
-	    var _doubleUpHandler = utilDoubleUp();
-
-	    var scheduleRedraw = throttle(redraw, 750);
-	    // var isRedrawScheduled = false;
-	    // var pendingRedrawCall;
-	    // function scheduleRedraw() {
-	    //     // Only schedule the redraw if one has not already been set.
-	    //     if (isRedrawScheduled) return;
-	    //     isRedrawScheduled = true;
-	    //     var that = this;
-	    //     var args = arguments;
-	    //     pendingRedrawCall = window.requestIdleCallback(function () {
-	    //         // Reset the boolean so future redraws can be set.
-	    //         isRedrawScheduled = false;
-	    //         redraw.apply(that, args);
-	    //     }, { timeout: 1400 });
-	    // }
-
-	    function cancelPendingRedraw() {
-	        scheduleRedraw.cancel();
-	        // isRedrawScheduled = false;
-	        // window.cancelIdleCallback(pendingRedrawCall);
-	    }
-
-
-	    function map(selection) {
-	        _selection = selection;
-
-	        context
-	            .on('change.map', immediateRedraw);
-
-	        var osm = context.connection();
-	        if (osm) {
-	            osm.on('change.map', immediateRedraw);
-	        }
-
-	        function didUndoOrRedo(targetTransform) {
-	            var mode = context.mode().id;
-	            if (mode !== 'browse' && mode !== 'select') { return; }
-	            if (targetTransform) {
-	                map.transformEase(targetTransform);
-	            }
-	        }
-
-	        context.history()
-	            .on('merge.map', function() { scheduleRedraw(); })
-	            .on('change.map', immediateRedraw)
-	            .on('undone.map', function(stack, fromStack) {
-	                didUndoOrRedo(fromStack.transform);
-	            })
-	            .on('redone.map', function(stack) {
-	                didUndoOrRedo(stack.transform);
-	            });
-
-	        context.background()
-	            .on('change.map', immediateRedraw);
-
-	        context.features()
-	            .on('redraw.map', immediateRedraw);
-
-	        drawLayers
-	            .on('change.map', function() {
-	                context.background().updateImagery();
-	                immediateRedraw();
-	            });
-
-	        selection
-	            .on('wheel.map mousewheel.map', function() {
-	                // disable swipe-to-navigate browser pages on trackpad/magic mouse – #5552
-	                event.preventDefault();
-	            })
-	            .call(_zoomerPanner)
-	            .call(_zoomerPanner.transform, projection.transform())
-	            .on('dblclick.zoom', null); // override d3-zoom dblclick handling
-
-	        map.supersurface = supersurface = selection.append('div')
-	            .attr('class', 'supersurface')
-	            .call(utilSetTransform, 0, 0);
-
-	        // Need a wrapper div because Opera can't cope with an absolutely positioned
-	        // SVG element: http://bl.ocks.org/jfirebaugh/6fbfbd922552bf776c16
-	        wrapper = supersurface
-	            .append('div')
-	            .attr('class', 'layer layer-data');
-
-	        map.surface = surface = wrapper
-	            .call(drawLayers)
-	            .selectAll('.surface');
-
-	        surface
-	            .call(drawLabels.observe)
-	            .call(_doubleUpHandler)
-	            .on(_pointerPrefix + 'down.zoom', function() {
-	                _lastPointerEvent = event;
-	                if (event.button === 2) {
-	                    event.stopPropagation();
-	                }
-	            }, true)
-	            .on(_pointerPrefix + 'up.zoom', function() {
-	                _lastPointerEvent = event;
-	                if (resetTransform()) {
-	                    immediateRedraw();
-	                }
-	            })
-	            .on(_pointerPrefix + 'move.map', function() {
-	                _lastPointerEvent = event;
-	            })
-	            .on(_pointerPrefix + 'over.vertices', function() {
-	                if (map.editableDataEnabled() && !_isTransformed) {
-	                    var hover = event.target.__data__;
-	                    surface.call(drawVertices.drawHover, context.graph(), hover, map.extent());
-	                    dispatch$1.call('drawn', this, { full: false });
-	                }
-	            })
-	            .on(_pointerPrefix + 'out.vertices', function() {
-	                if (map.editableDataEnabled() && !_isTransformed) {
-	                    var hover = event.relatedTarget && event.relatedTarget.__data__;
-	                    surface.call(drawVertices.drawHover, context.graph(), hover, map.extent());
-	                    dispatch$1.call('drawn', this, { full: false });
-	                }
-	            });
-
-	        var detected = utilDetect();
-
-	        // only WebKit supports gesture events
-	        if ('GestureEvent' in window &&
-	            // Listening for gesture events on iOS 13.4+ breaks double-tapping,
-	            // but we only need to do this on desktop Safari anyway. – #7694
-	            !detected.isMobileWebKit) {
-
-	            // Desktop Safari sends gesture events for multitouch trackpad pinches.
-	            // We can listen for these and translate them into map zooms.
-	            surface
-	                .on('gesturestart.surface', function() {
-	                    event.preventDefault();
-	                    _gestureTransformStart = projection.transform();
-	                })
-	                .on('gesturechange.surface', gestureChange);
-	        }
-
-	        // must call after surface init
-	        updateAreaFill();
-
-	        _doubleUpHandler.on('doubleUp.map', function(p0) {
-	            if (!_dblClickZoomEnabled) { return; }
-
-	            // don't zoom if targeting something other than the map itself
-	            if (typeof event.target.__data__ === 'object' &&
-	                // or area fills
-	                !select(event.target).classed('fill')) { return; }
-
-	            var zoomOut = event.shiftKey;
-
-	            var t = projection.transform();
-
-	            var p1 = t.invert(p0);
-
-	            t = t.scale(zoomOut ? 0.5 : 2);
-
-	            t.x = p0[0] - p1[0] * t.k;
-	            t.y = p0[1] - p1[1] * t.k;
-
-	            map.transformEase(t);
-	        });
-
-	        context.on('enter.map',  function() {
-	            if (!map.editableDataEnabled(true /* skip zoom check */)) { return; }
-
-	            // redraw immediately any objects affected by a change in selectedIDs.
-	            var graph = context.graph();
-	            var selectedAndParents = {};
-	            context.selectedIDs().forEach(function(id) {
-	                var entity = graph.hasEntity(id);
-	                if (entity) {
-	                    selectedAndParents[entity.id] = entity;
-	                    if (entity.type === 'node') {
-	                        graph.parentWays(entity).forEach(function(parent) {
-	                            selectedAndParents[parent.id] = parent;
-	                        });
-	                    }
-	                }
-	            });
-	            var data = Object.values(selectedAndParents);
-	            var filter = function(d) { return d.id in selectedAndParents; };
-
-	            data = context.features().filter(data, graph);
-
-	            surface
-	                .call(drawVertices.drawSelected, graph, map.extent())
-	                .call(drawLines, graph, data, filter)
-	                .call(drawAreas, graph, data, filter)
-	                .call(drawMidpoints, graph, data, filter, map.trimmedExtent());
-
-	            dispatch$1.call('drawn', this, { full: false });
-
-	            // redraw everything else later
-	            scheduleRedraw();
-	        });
-
-	        map.dimensions(utilGetDimensions(selection));
-	    }
-
-
-	    function zoomEventFilter() {
-	        // Fix for #2151, (see also d3/d3-zoom#60, d3/d3-brush#18)
-	        // Intercept `mousedown` and check if there is an orphaned zoom gesture.
-	        // This can happen if a previous `mousedown` occurred without a `mouseup`.
-	        // If we detect this, dispatch `mouseup` to complete the orphaned gesture,
-	        // so that d3-zoom won't stop propagation of new `mousedown` events.
-	        if (event.type === 'mousedown') {
-	            var hasOrphan = false;
-	            var listeners = window.__on;
-	            for (var i = 0; i < listeners.length; i++) {
-	                var listener = listeners[i];
-	                if (listener.name === 'zoom' && listener.type === 'mouseup') {
-	                    hasOrphan = true;
-	                    break;
-	                }
-	            }
-	            if (hasOrphan) {
-	                var event$1 = window.CustomEvent;
-	                if (event$1) {
-	                    event$1 = new event$1('mouseup');
-	                } else {
-	                    event$1 = window.document.createEvent('Event');
-	                    event$1.initEvent('mouseup', false, false);
-	                }
-	                // Event needs to be dispatched with an event.view property.
-	                event$1.view = window;
-	                window.dispatchEvent(event$1);
-	            }
-	        }
-
-	        return event.button !== 2;   // ignore right clicks
-	    }
-
-
-	    function pxCenter() {
-	        return [_dimensions[0] / 2, _dimensions[1] / 2];
-	    }
-
-
-	    function drawEditable(difference, extent) {
-	        var mode = context.mode();
-	        var graph = context.graph();
-	        var features = context.features();
-	        var all = context.history().intersects(map.extent());
-	        var fullRedraw = false;
-	        var data;
-	        var set;
-	        var filter;
-	        var applyFeatureLayerFilters = true;
-
-	        if (map.isInWideSelection()) {
-	            data = [];
-	            utilEntityAndDeepMemberIDs(mode.selectedIDs(), context.graph()).forEach(function(id) {
-	                var entity = context.hasEntity(id);
-	                if (entity) { data.push(entity); }
-	            });
-	            fullRedraw = true;
-	            filter = utilFunctor(true);
-	            // selected features should always be visible, so we can skip filtering
-	            applyFeatureLayerFilters = false;
-
-	        } else if (difference) {
-	            var complete = difference.complete(map.extent());
-	            data = Object.values(complete).filter(Boolean);
-	            set = new Set(Object.keys(complete));
-	            filter = function(d) { return set.has(d.id); };
-	            features.clear(data);
-
-	        } else {
-	            // force a full redraw if gatherStats detects that a feature
-	            // should be auto-hidden (e.g. points or buildings)..
-	            if (features.gatherStats(all, graph, _dimensions)) {
-	                extent = undefined;
-	            }
-
-	            if (extent) {
-	                data = context.history().intersects(map.extent().intersection(extent));
-	                set = new Set(data.map(function(entity) { return entity.id; }));
-	                filter = function(d) { return set.has(d.id); };
-
-	            } else {
-	                data = all;
-	                fullRedraw = true;
-	                filter = utilFunctor(true);
-	            }
-	        }
-
-	        if (applyFeatureLayerFilters) {
-	            data = features.filter(data, graph);
-	        } else {
-	            context.features().resetStats();
-	        }
-
-	        if (mode && mode.id === 'select') {
-	            // update selected vertices - the user might have just double-clicked a way,
-	            // creating a new vertex, triggering a partial redraw without a mode change
-	            surface.call(drawVertices.drawSelected, graph, map.extent());
-	        }
-
-	        surface
-	            .call(drawVertices, graph, data, filter, map.extent(), fullRedraw)
-	            .call(drawLines, graph, data, filter)
-	            .call(drawAreas, graph, data, filter)
-	            .call(drawMidpoints, graph, data, filter, map.trimmedExtent())
-	            .call(drawLabels, graph, data, filter, _dimensions, fullRedraw)
-	            .call(drawPoints, graph, data, filter);
-
-	        dispatch$1.call('drawn', this, {full: true});
-	    }
-
-	    map.init = function() {
-	        drawLayers = svgLayers(projection, context);
-	        drawPoints = svgPoints(projection, context);
-	        drawVertices = svgVertices(projection, context);
-	        drawLines = svgLines(projection, context);
-	        drawAreas = svgAreas(projection, context);
-	        drawMidpoints = svgMidpoints(projection, context);
-	        drawLabels = svgLabels(projection, context);
-	    };
-
-	    function editOff() {
-	        context.features().resetStats();
-	        surface.selectAll('.layer-osm *').remove();
-	        surface.selectAll('.layer-touch:not(.markers) *').remove();
-
-	        var allowed = {
-	            'browse': true,
-	            'save': true,
-	            'select-note': true,
-	            'select-data': true,
-	            'select-error': true
-	        };
-
-	        var mode = context.mode();
-	        if (mode && !allowed[mode.id]) {
-	            context.enter(modeBrowse(context));
-	        }
-
-	        dispatch$1.call('drawn', this, {full: true});
-	    }
-
-
-
-
-
-	    function gestureChange() {
-	        // Remap Safari gesture events to wheel events - #5492
-	        // We want these disabled most places, but enabled for zoom/unzoom on map surface
-	        // https://developer.mozilla.org/en-US/docs/Web/API/GestureEvent
-	        var e = event;
-	        e.preventDefault();
-
-	        var props = {
-	            deltaMode: 0,    // dummy values to ignore in zoomPan
-	            deltaY: 1,       // dummy values to ignore in zoomPan
-	            clientX: e.clientX,
-	            clientY: e.clientY,
-	            screenX: e.screenX,
-	            screenY: e.screenY,
-	            x: e.x,
-	            y: e.y
-	        };
-
-	        var e2 = new WheelEvent('wheel', props);
-	        e2._scale = e.scale;         // preserve the original scale
-	        e2._rotation = e.rotation;   // preserve the original rotation
-
-	        _selection.node().dispatchEvent(e2);
-	    }
-
-
-	    function zoomPan(manualEvent) {
-	        var event$1 = (manualEvent || event);
-	        var source = event$1.sourceEvent;
-	        var eventTransform = event$1.transform;
-	        var x = eventTransform.x;
-	        var y = eventTransform.y;
-	        var k = eventTransform.k;
-
-	        // Special handling of 'wheel' events:
-	        // They might be triggered by the user scrolling the mouse wheel,
-	        // or 2-finger pinch/zoom gestures, the transform may need adjustment.
-	        if (source && source.type === 'wheel') {
-
-	            // assume that the gesture is already handled by pointer events
-	            if (_pointerDown) { return; }
-
-	            var detected = utilDetect();
-	            var dX = source.deltaX;
-	            var dY = source.deltaY;
-	            var x2 = x;
-	            var y2 = y;
-	            var k2 = k;
-	            var t0, p0, p1;
-
-	            // Normalize mousewheel scroll speed (Firefox) - #3029
-	            // If wheel delta is provided in LINE units, recalculate it in PIXEL units
-	            // We are essentially redoing the calculations that occur here:
-	            //   https://github.com/d3/d3-zoom/blob/78563a8348aa4133b07cac92e2595c2227ca7cd7/src/zoom.js#L203
-	            // See this for more info:
-	            //   https://github.com/basilfx/normalize-wheel/blob/master/src/normalizeWheel.js
-	            if (source.deltaMode === 1 /* LINE */) {
-	                // Convert from lines to pixels, more if the user is scrolling fast.
-	                // (I made up the exp function to roughly match Firefox to what Chrome does)
-	                // These numbers should be floats, because integers are treated as pan gesture below.
-	                var lines = Math.abs(source.deltaY);
-	                var sign = (source.deltaY > 0) ? 1 : -1;
-	                dY = sign * clamp(
-	                    Math.exp((lines - 1) * 0.75) * 4.000244140625,
-	                    4.000244140625,    // min
-	                    350.000244140625   // max
-	                );
-
-	                // On Firefox Windows and Linux we always get +/- the scroll line amount (default 3)
-	                // There doesn't seem to be any scroll acceleration.
-	                // This multiplier increases the speed a little bit - #5512
-	                if (detected.os !== 'mac') {
-	                    dY *= 5;
-	                }
-
-	                // recalculate x2,y2,k2
-	                t0 = _isTransformed ? _transformLast : _transformStart;
-	                p0 = _getMouseCoords(source);
-	                p1 = t0.invert(p0);
-	                k2 = t0.k * Math.pow(2, -dY / 500);
-	                k2 = clamp(k2, kMin, kMax);
-	                x2 = p0[0] - p1[0] * k2;
-	                y2 = p0[1] - p1[1] * k2;
-
-	            // 2 finger map pinch zooming (Safari) - #5492
-	            // These are fake `wheel` events we made from Safari `gesturechange` events..
-	            } else if (source._scale) {
-	                // recalculate x2,y2,k2
-	                t0 = _gestureTransformStart;
-	                p0 = _getMouseCoords(source);
-	                p1 = t0.invert(p0);
-	                k2 = t0.k * source._scale;
-	                k2 = clamp(k2, kMin, kMax);
-	                x2 = p0[0] - p1[0] * k2;
-	                y2 = p0[1] - p1[1] * k2;
-
-	            // 2 finger map pinch zooming (all browsers except Safari) - #5492
-	            // Pinch zooming via the `wheel` event will always have:
-	            // - `ctrlKey = true`
-	            // - `deltaY` is not round integer pixels (ignore `deltaX`)
-	            } else if (source.ctrlKey && !isInteger(dY)) {
-	                dY *= 6;   // slightly scale up whatever the browser gave us
-
-	                // recalculate x2,y2,k2
-	                t0 = _isTransformed ? _transformLast : _transformStart;
-	                p0 = _getMouseCoords(source);
-	                p1 = t0.invert(p0);
-	                k2 = t0.k * Math.pow(2, -dY / 500);
-	                k2 = clamp(k2, kMin, kMax);
-	                x2 = p0[0] - p1[0] * k2;
-	                y2 = p0[1] - p1[1] * k2;
-
-	            // Trackpad scroll zooming with shift or alt/option key down
-	            } else if ((source.altKey || source.shiftKey) && isInteger(dY)) {
-	                // recalculate x2,y2,k2
-	                t0 = _isTransformed ? _transformLast : _transformStart;
-	                p0 = _getMouseCoords(source);
-	                p1 = t0.invert(p0);
-	                k2 = t0.k * Math.pow(2, -dY / 500);
-	                k2 = clamp(k2, kMin, kMax);
-	                x2 = p0[0] - p1[0] * k2;
-	                y2 = p0[1] - p1[1] * k2;
-
-	            // 2 finger map panning (Mac only, all browsers) - #5492, #5512
-	            // Panning via the `wheel` event will always have:
-	            // - `ctrlKey = false`
-	            // - `deltaX`,`deltaY` are round integer pixels
-	            } else if (detected.os === 'mac' && !source.ctrlKey && isInteger(dX) && isInteger(dY)) {
-	                p1 = projection.translate();
-	                x2 = p1[0] - dX;
-	                y2 = p1[1] - dY;
-	                k2 = projection.scale();
-	                k2 = clamp(k2, kMin, kMax);
-	            }
-
-	            // something changed - replace the event transform
-	            if (x2 !== x || y2 !== y || k2 !== k) {
-	                x = x2;
-	                y = y2;
-	                k = k2;
-	                eventTransform = identity$2.translate(x2, y2).scale(k2);
-	                if (_zoomerPanner._transform) {
-	                    // utilZoomPan interface
-	                    _zoomerPanner._transform(eventTransform);
-	                } else {
-	                    // d3_zoom interface
-	                    _selection.node().__zoom = eventTransform;
-	                }
-	            }
-
-	        }
-
-	        if (_transformStart.x === x &&
-	            _transformStart.y === y &&
-	            _transformStart.k === k) {
-	            return;  // no change
-	        }
-
-	        var withinEditableZoom = map.withinEditableZoom();
-	        if (_lastWithinEditableZoom !== withinEditableZoom) {
-	            if (_lastWithinEditableZoom !== undefined) {
-	                // notify that the map zoomed in or out over the editable zoom threshold
-	                dispatch$1.call('crossEditableZoom', this, withinEditableZoom);
-	            }
-	            _lastWithinEditableZoom = withinEditableZoom;
-	        }
-
-	        if (geoScaleToZoom(k, TILESIZE) < _minzoom) {
-	            surface.interrupt();
-	            dispatch$1.call('hitMinZoom', this, map);
-	            setCenterZoom(map.center(), context.minEditableZoom(), 0, true);
-	            scheduleRedraw();
-	            dispatch$1.call('move', this, map);
-	            return;
-	        }
-
-	        projection.transform(eventTransform);
-
-	        var scale = k / _transformStart.k;
-	        var tX = (x / scale - _transformStart.x) * scale;
-	        var tY = (y / scale - _transformStart.y) * scale;
-
-	        if (context.inIntro()) {
-	            curtainProjection.transform({
-	                x: x - tX,
-	                y: y - tY,
-	                k: k
-	            });
-	        }
-
-	        if (source) {
-	            _lastPointerEvent = event$1;
-	        }
-	        _isTransformed = true;
-	        _transformLast = eventTransform;
-	        utilSetTransform(supersurface, tX, tY, scale);
-	        scheduleRedraw();
-
-	        dispatch$1.call('move', this, map);
-
-
-	        function isInteger(val) {
-	            return typeof val === 'number' && isFinite(val) && Math.floor(val) === val;
-	        }
-	    }
-
-
-	    function resetTransform() {
-	        if (!_isTransformed) { return false; }
-
-	        utilSetTransform(supersurface, 0, 0);
-	        _isTransformed = false;
-	        if (context.inIntro()) {
-	            curtainProjection.transform(projection.transform());
-	        }
-	        return true;
-	    }
-
-
-	    function redraw(difference, extent) {
-	        if (surface.empty() || !_redrawEnabled) { return; }
-
-	        // If we are in the middle of a zoom/pan, we can't do differenced redraws.
-	        // It would result in artifacts where differenced entities are redrawn with
-	        // one transform and unchanged entities with another.
-	        if (resetTransform()) {
-	            difference = extent = undefined;
-	        }
-
-	        var zoom = map.zoom();
-	        var z = String(~~zoom);
-
-	        if (surface.attr('data-zoom') !== z) {
-	            surface.attr('data-zoom', z);
-	        }
-
-	        // class surface as `lowzoom` around z17-z18.5 (based on latitude)
-	        var lat = map.center()[1];
-	        var lowzoom = linear$2()
-	            .domain([-60, 0, 60])
-	            .range([17, 18.5, 17])
-	            .clamp(true);
-
-	        surface
-	            .classed('low-zoom', zoom <= lowzoom(lat));
-
-
-	        if (!difference) {
-	            supersurface.call(context.background());
-	            wrapper.call(drawLayers);
-	        }
-
-	        // OSM
-	        if (map.editableDataEnabled() || map.isInWideSelection()) {
-	            context.loadTiles(projection);
-	            drawEditable(difference, extent);
-	        } else {
-	            editOff();
-	        }
-
-	        _transformStart = projection.transform();
-
-	        return map;
-	    }
-
-
-
-	    var immediateRedraw = function(difference, extent) {
-	        if (!difference && !extent) { cancelPendingRedraw(); }
-	        redraw(difference, extent);
-	    };
-
-
-	    map.lastPointerEvent = function() {
-	        return _lastPointerEvent;
-	    };
-
-
-	    map.mouse = function() {
-	        var event$1 = _lastPointerEvent || event;
-	        if (event$1) {
-	            var s;
-	            while ((s = event$1.sourceEvent)) { event$1 = s; }
-	            return _getMouseCoords(event$1);
-	        }
-	        return null;
-	    };
-
-
-	    // returns Lng/Lat
-	    map.mouseCoordinates = function() {
-	        var coord = map.mouse() || pxCenter();
-	        return projection.invert(coord);
-	    };
-
-
-	    map.dblclickZoomEnable = function(val) {
-	        if (!arguments.length) { return _dblClickZoomEnabled; }
-	        _dblClickZoomEnabled = val;
-	        return map;
-	    };
-
-
-	    map.redrawEnable = function(val) {
-	        if (!arguments.length) { return _redrawEnabled; }
-	        _redrawEnabled = val;
-	        return map;
-	    };
-
-
-	    map.isTransformed = function() {
-	        return _isTransformed;
-	    };
-
-
-	    function setTransform(t2, duration, force) {
-	        var t = projection.transform();
-	        if (!force && t2.k === t.k && t2.x === t.x && t2.y === t.y) { return false; }
-
-	        if (duration) {
-	            _selection
-	                .transition()
-	                .duration(duration)
-	                .on('start', function() { map.startEase(); })
-	                .call(_zoomerPanner.transform, identity$2.translate(t2.x, t2.y).scale(t2.k));
-	        } else {
-	            projection.transform(t2);
-	            _transformStart = t2;
-	            _selection.call(_zoomerPanner.transform, _transformStart);
-	        }
-
-	        return true;
-	    }
-
-
-	    function setCenterZoom(loc2, z2, duration, force) {
-	        var c = map.center();
-	        var z = map.zoom();
-	        if (loc2[0] === c[0] && loc2[1] === c[1] && z2 === z && !force) { return false; }
-
-	        var proj = geoRawMercator().transform(projection.transform());  // copy projection
-
-	        var k2 = clamp(geoZoomToScale(z2, TILESIZE), kMin, kMax);
-	        proj.scale(k2);
-
-	        var t = proj.translate();
-	        var point = proj(loc2);
-
-	        var center = pxCenter();
-	        t[0] += center[0] - point[0];
-	        t[1] += center[1] - point[1];
-
-	        return setTransform(identity$2.translate(t[0], t[1]).scale(k2), duration, force);
-	    }
-
-
-	    map.pan = function(delta, duration) {
-	        var t = projection.translate();
-	        var k = projection.scale();
-
-	        t[0] += delta[0];
-	        t[1] += delta[1];
-
-	        if (duration) {
-	            _selection
-	                .transition()
-	                .duration(duration)
-	                .on('start', function() { map.startEase(); })
-	                .call(_zoomerPanner.transform, identity$2.translate(t[0], t[1]).scale(k));
-	        } else {
-	            projection.translate(t);
-	            _transformStart = projection.transform();
-	            _selection.call(_zoomerPanner.transform, _transformStart);
-	            dispatch$1.call('move', this, map);
-	            immediateRedraw();
-	        }
-
-	        return map;
-	    };
-
-
-	    map.dimensions = function(val) {
-	        if (!arguments.length) { return _dimensions; }
-
-	        _dimensions = val;
-	        drawLayers.dimensions(_dimensions);
-	        context.background().dimensions(_dimensions);
-	        projection.clipExtent([[0, 0], _dimensions]);
-	        _getMouseCoords = utilFastMouse(supersurface.node());
-
-	        scheduleRedraw();
-	        return map;
-	    };
-
-
-	    function zoomIn(delta) {
-	        setCenterZoom(map.center(), ~~map.zoom() + delta, 250, true);
-	    }
-
-	    function zoomOut(delta) {
-	        setCenterZoom(map.center(), ~~map.zoom() - delta, 250, true);
-	    }
-
-	    map.zoomIn = function() { zoomIn(1); };
-	    map.zoomInFurther = function() { zoomIn(4); };
-	    map.canZoomIn = function() { return map.zoom() < maxZoom; };
-
-	    map.zoomOut = function() { zoomOut(1); };
-	    map.zoomOutFurther = function() { zoomOut(4); };
-	    map.canZoomOut = function() { return map.zoom() > minZoom; };
-
-	    map.center = function(loc2) {
-	        if (!arguments.length) {
-	            return projection.invert(pxCenter());
-	        }
-
-	        if (setCenterZoom(loc2, map.zoom())) {
-	            dispatch$1.call('move', this, map);
-	        }
-
-	        scheduleRedraw();
-	        return map;
-	    };
-
-	    map.unobscuredCenterZoomEase = function(loc, zoom) {
-	        var offset = map.unobscuredOffsetPx();
-
-	        var proj = geoRawMercator().transform(projection.transform());  // copy projection
-	        // use the target zoom to calculate the offset center
-	        proj.scale(geoZoomToScale(zoom, TILESIZE));
-
-	        var locPx = proj(loc);
-	        var offsetLocPx = [locPx[0] + offset[0], locPx[1] + offset[1]];
-	        var offsetLoc = proj.invert(offsetLocPx);
-
-	        map.centerZoomEase(offsetLoc, zoom);
-	    };
-
-	    map.unobscuredOffsetPx = function() {
-	        var openPane = context.container().select('.map-panes .map-pane.shown');
-	        if (!openPane.empty()) {
-	            return [openPane.node().offsetWidth/2, 0];
-	        }
-	        return [0, 0];
-	    };
-
-	    map.zoom = function(z2) {
-	        if (!arguments.length) {
-	            return Math.max(geoScaleToZoom(projection.scale(), TILESIZE), 0);
-	        }
-
-	        if (z2 < _minzoom) {
-	            surface.interrupt();
-	            dispatch$1.call('hitMinZoom', this, map);
-	            z2 = context.minEditableZoom();
-	        }
-
-	        if (setCenterZoom(map.center(), z2)) {
-	            dispatch$1.call('move', this, map);
-	        }
-
-	        scheduleRedraw();
-	        return map;
-	    };
-
-
-	    map.centerZoom = function(loc2, z2) {
-	        if (setCenterZoom(loc2, z2)) {
-	            dispatch$1.call('move', this, map);
-	        }
-
-	        scheduleRedraw();
-	        return map;
-	    };
-
-
-	    map.zoomTo = function(entity) {
-	        var extent = entity.extent(context.graph());
-	        if (!isFinite(extent.area())) { return map; }
+	var minZoom = 2;
+	var maxZoom = 24;
+	var kMin = geoZoomToScale(minZoom, TILESIZE);
+	var kMax = geoZoomToScale(maxZoom, TILESIZE);
 
-	        var z2 = clamp(map.trimmedExtentZoom(extent), 0, 20);
-	        return map.centerZoom(extent.center(), z2);
-	    };
+	function clamp$1(num, min, max) {
+	  return Math.max(min, Math.min(num, max));
+	}
 
+	function rendererMap(context) {
+	  var dispatch = dispatch$8('move', 'drawn', 'crossEditableZoom', 'hitMinZoom', 'changeHighlighting', 'changeAreaFill');
+	  var projection = context.projection;
+	  var curtainProjection = context.curtainProjection;
+	  var drawLayers;
+	  var drawPoints;
+	  var drawVertices;
+	  var drawLines;
+	  var drawAreas;
+	  var drawMidpoints;
+	  var drawLabels;
 
-	    map.centerEase = function(loc2, duration) {
-	        duration = duration || 250;
-	        setCenterZoom(loc2, map.zoom(), duration);
-	        return map;
-	    };
+	  var _selection = select(null);
 
+	  var supersurface = select(null);
+	  var wrapper = select(null);
+	  var surface = select(null);
+	  var _dimensions = [1, 1];
+	  var _dblClickZoomEnabled = true;
+	  var _redrawEnabled = true;
 
-	    map.zoomEase = function(z2, duration) {
-	        duration = duration || 250;
-	        setCenterZoom(map.center(), z2, duration, false);
-	        return map;
-	    };
+	  var _gestureTransformStart;
 
+	  var _transformStart = projection.transform();
 
-	    map.centerZoomEase = function(loc2, z2, duration) {
-	        duration = duration || 250;
-	        setCenterZoom(loc2, z2, duration, false);
-	        return map;
-	    };
+	  var _transformLast;
 
+	  var _isTransformed = false;
+	  var _minzoom = 0;
 
-	    map.transformEase = function(t2, duration) {
-	        duration = duration || 250;
-	        setTransform(t2, duration, false /* don't force */);
-	        return map;
-	    };
+	  var _getMouseCoords;
 
+	  var _lastPointerEvent;
 
-	    map.zoomToEase = function(obj, duration) {
-	        var extent;
-	        if (Array.isArray(obj)) {
-	            obj.forEach(function(entity) {
-	                var entityExtent = entity.extent(context.graph());
-	                if (!extent) {
-	                    extent = entityExtent;
-	                } else {
-	                    extent = extent.extend(entityExtent);
-	                }
-	            });
-	        } else {
-	            extent = obj.extent(context.graph());
-	        }
-	        if (!isFinite(extent.area())) { return map; }
+	  var _lastWithinEditableZoom; // whether a pointerdown event started the zoom
 
-	        var z2 = clamp(map.trimmedExtentZoom(extent), 0, 20);
-	        return map.centerZoomEase(extent.center(), z2, duration);
-	    };
 
+	  var _pointerDown = false; // use pointer events on supported platforms; fallback to mouse events
 
-	    map.startEase = function() {
-	        utilBindOnce(surface, _pointerPrefix + 'down.ease', function() {
-	            map.cancelEase();
-	        });
-	        return map;
-	    };
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // use pointer event interaction if supported; fallback to touch/mouse events in d3-zoom
 
 
-	    map.cancelEase = function() {
-	        _selection.interrupt();
-	        return map;
-	    };
+	  var _zoomerPannerFunction = 'PointerEvent' in window ? utilZoomPan : d3_zoom;
 
+	  var _zoomerPanner = _zoomerPannerFunction().scaleExtent([kMin, kMax]).interpolate(interpolate$1).filter(zoomEventFilter).on('zoom.map', zoomPan).on('start.map', function (d3_event) {
+	    _pointerDown = d3_event && (d3_event.type === 'pointerdown' || d3_event.sourceEvent && d3_event.sourceEvent.type === 'pointerdown');
+	  }).on('end.map', function () {
+	    _pointerDown = false;
+	  });
 
-	    map.extent = function(val) {
-	        if (!arguments.length) {
-	            return new geoExtent(
-	                projection.invert([0, _dimensions[1]]),
-	                projection.invert([_dimensions[0], 0])
-	            );
-	        } else {
-	            var extent = geoExtent(val);
-	            map.centerZoom(extent.center(), map.extentZoom(extent));
-	        }
-	    };
+	  var _doubleUpHandler = utilDoubleUp();
+
+	  var scheduleRedraw = throttle(redraw, 750); // var isRedrawScheduled = false;
+	  // var pendingRedrawCall;
+	  // function scheduleRedraw() {
+	  //     // Only schedule the redraw if one has not already been set.
+	  //     if (isRedrawScheduled) return;
+	  //     isRedrawScheduled = true;
+	  //     var that = this;
+	  //     var args = arguments;
+	  //     pendingRedrawCall = window.requestIdleCallback(function () {
+	  //         // Reset the boolean so future redraws can be set.
+	  //         isRedrawScheduled = false;
+	  //         redraw.apply(that, args);
+	  //     }, { timeout: 1400 });
+	  // }
 
 
-	    map.trimmedExtent = function(val) {
-	        if (!arguments.length) {
-	            var headerY = 71;
-	            var footerY = 30;
-	            var pad = 10;
-	            return new geoExtent(
-	                projection.invert([pad, _dimensions[1] - footerY - pad]),
-	                projection.invert([_dimensions[0] - pad, headerY + pad])
-	            );
-	        } else {
-	            var extent = geoExtent(val);
-	            map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
-	        }
-	    };
+	  function cancelPendingRedraw() {
+	    scheduleRedraw.cancel(); // isRedrawScheduled = false;
+	    // window.cancelIdleCallback(pendingRedrawCall);
+	  }
 
+	  function map(selection) {
+	    _selection = selection;
+	    context.on('change.map', immediateRedraw);
+	    var osm = context.connection();
 
-	    function calcExtentZoom(extent, dim) {
-	        var tl = projection([extent[0][0], extent[1][1]]);
-	        var br = projection([extent[1][0], extent[0][1]]);
+	    if (osm) {
+	      osm.on('change.map', immediateRedraw);
+	    }
 
-	        // Calculate maximum zoom that fits extent
-	        var hFactor = (br[0] - tl[0]) / dim[0];
-	        var vFactor = (br[1] - tl[1]) / dim[1];
-	        var hZoomDiff = Math.log(Math.abs(hFactor)) / Math.LN2;
-	        var vZoomDiff = Math.log(Math.abs(vFactor)) / Math.LN2;
-	        var newZoom = map.zoom() - Math.max(hZoomDiff, vZoomDiff);
+	    function didUndoOrRedo(targetTransform) {
+	      var mode = context.mode().id;
+	      if (mode !== 'browse' && mode !== 'select') return;
 
-	        return newZoom;
+	      if (targetTransform) {
+	        map.transformEase(targetTransform);
+	      }
 	    }
 
+	    context.history().on('merge.map', function () {
+	      scheduleRedraw();
+	    }).on('change.map', immediateRedraw).on('undone.map', function (stack, fromStack) {
+	      didUndoOrRedo(fromStack.transform);
+	    }).on('redone.map', function (stack) {
+	      didUndoOrRedo(stack.transform);
+	    });
+	    context.background().on('change.map', immediateRedraw);
+	    context.features().on('redraw.map', immediateRedraw);
+	    drawLayers.on('change.map', function () {
+	      context.background().updateImagery();
+	      immediateRedraw();
+	    });
+	    selection.on('wheel.map mousewheel.map', function (d3_event) {
+	      // disable swipe-to-navigate browser pages on trackpad/magic mouse – #5552
+	      d3_event.preventDefault();
+	    }).call(_zoomerPanner).call(_zoomerPanner.transform, projection.transform()).on('dblclick.zoom', null); // override d3-zoom dblclick handling
 
-	    map.extentZoom = function(val) {
-	        return calcExtentZoom(geoExtent(val), _dimensions);
-	    };
+	    map.supersurface = supersurface = selection.append('div').attr('class', 'supersurface').call(utilSetTransform, 0, 0); // Need a wrapper div because Opera can't cope with an absolutely positioned
+	    // SVG element: http://bl.ocks.org/jfirebaugh/6fbfbd922552bf776c16
 
+	    wrapper = supersurface.append('div').attr('class', 'layer layer-data');
+	    map.surface = surface = wrapper.call(drawLayers).selectAll('.surface');
+	    surface.call(drawLabels.observe).call(_doubleUpHandler).on(_pointerPrefix + 'down.zoom', function (d3_event) {
+	      _lastPointerEvent = d3_event;
 
-	    map.trimmedExtentZoom = function(val) {
-	        var trimY = 120;
-	        var trimX = 40;
-	        var trimmed = [_dimensions[0] - trimX, _dimensions[1] - trimY];
-	        return calcExtentZoom(geoExtent(val), trimmed);
-	    };
+	      if (d3_event.button === 2) {
+	        d3_event.stopPropagation();
+	      }
+	    }, true).on(_pointerPrefix + 'up.zoom', function (d3_event) {
+	      _lastPointerEvent = d3_event;
 
+	      if (resetTransform()) {
+	        immediateRedraw();
+	      }
+	    }).on(_pointerPrefix + 'move.map', function (d3_event) {
+	      _lastPointerEvent = d3_event;
+	    }).on(_pointerPrefix + 'over.vertices', function (d3_event) {
+	      if (map.editableDataEnabled() && !_isTransformed) {
+	        var hover = d3_event.target.__data__;
+	        surface.call(drawVertices.drawHover, context.graph(), hover, map.extent());
+	        dispatch.call('drawn', this, {
+	          full: false
+	        });
+	      }
+	    }).on(_pointerPrefix + 'out.vertices', function (d3_event) {
+	      if (map.editableDataEnabled() && !_isTransformed) {
+	        var hover = d3_event.relatedTarget && d3_event.relatedTarget.__data__;
+	        surface.call(drawVertices.drawHover, context.graph(), hover, map.extent());
+	        dispatch.call('drawn', this, {
+	          full: false
+	        });
+	      }
+	    });
+	    var detected = utilDetect(); // only WebKit supports gesture events
+
+	    if ('GestureEvent' in window && // Listening for gesture events on iOS 13.4+ breaks double-tapping,
+	    // but we only need to do this on desktop Safari anyway. – #7694
+	    !detected.isMobileWebKit) {
+	      // Desktop Safari sends gesture events for multitouch trackpad pinches.
+	      // We can listen for these and translate them into map zooms.
+	      surface.on('gesturestart.surface', function (d3_event) {
+	        d3_event.preventDefault();
+	        _gestureTransformStart = projection.transform();
+	      }).on('gesturechange.surface', gestureChange);
+	    } // must call after surface init
+
+
+	    updateAreaFill();
+
+	    _doubleUpHandler.on('doubleUp.map', function (d3_event, p0) {
+	      if (!_dblClickZoomEnabled) return; // don't zoom if targeting something other than the map itself
+
+	      if (_typeof(d3_event.target.__data__) === 'object' && // or area fills
+	      !select(d3_event.target).classed('fill')) return;
+	      var zoomOut = d3_event.shiftKey;
+	      var t = projection.transform();
+	      var p1 = t.invert(p0);
+	      t = t.scale(zoomOut ? 0.5 : 2);
+	      t.x = p0[0] - p1[0] * t.k;
+	      t.y = p0[1] - p1[1] * t.k;
+	      map.transformEase(t);
+	    });
 
-	    map.withinEditableZoom = function() {
-	        return map.zoom() >= context.minEditableZoom();
-	    };
+	    context.on('enter.map', function () {
+	      if (!map.editableDataEnabled(true
+	      /* skip zoom check */
+	      )) return;
+	      if (_isTransformed) return; // redraw immediately any objects affected by a change in selectedIDs.
 
+	      var graph = context.graph();
+	      var selectedAndParents = {};
+	      context.selectedIDs().forEach(function (id) {
+	        var entity = graph.hasEntity(id);
 
-	    map.isInWideSelection = function() {
-	        return !map.withinEditableZoom() && context.selectedIDs().length;
-	    };
+	        if (entity) {
+	          selectedAndParents[entity.id] = entity;
 
+	          if (entity.type === 'node') {
+	            graph.parentWays(entity).forEach(function (parent) {
+	              selectedAndParents[parent.id] = parent;
+	            });
+	          }
+	        }
+	      });
+	      var data = Object.values(selectedAndParents);
 
-	    map.editableDataEnabled = function(skipZoomCheck) {
+	      var filter = function filter(d) {
+	        return d.id in selectedAndParents;
+	      };
 
-	        var layer = context.layers().layer('osm');
-	        if (!layer || !layer.enabled()) { return false; }
+	      data = context.features().filter(data, graph);
+	      surface.call(drawVertices.drawSelected, graph, map.extent()).call(drawLines, graph, data, filter).call(drawAreas, graph, data, filter).call(drawMidpoints, graph, data, filter, map.trimmedExtent());
+	      dispatch.call('drawn', this, {
+	        full: false
+	      }); // redraw everything else later
 
-	        return skipZoomCheck || map.withinEditableZoom();
-	    };
+	      scheduleRedraw();
+	    });
+	    map.dimensions(utilGetDimensions(selection));
+	  }
 
+	  function zoomEventFilter(d3_event) {
+	    // Fix for #2151, (see also d3/d3-zoom#60, d3/d3-brush#18)
+	    // Intercept `mousedown` and check if there is an orphaned zoom gesture.
+	    // This can happen if a previous `mousedown` occurred without a `mouseup`.
+	    // If we detect this, dispatch `mouseup` to complete the orphaned gesture,
+	    // so that d3-zoom won't stop propagation of new `mousedown` events.
+	    if (d3_event.type === 'mousedown') {
+	      var hasOrphan = false;
+	      var listeners = window.__on;
 
-	    map.notesEditable = function() {
-	        var layer = context.layers().layer('notes');
-	        if (!layer || !layer.enabled()) { return false; }
+	      for (var i = 0; i < listeners.length; i++) {
+	        var listener = listeners[i];
 
-	        return map.withinEditableZoom();
-	    };
+	        if (listener.name === 'zoom' && listener.type === 'mouseup') {
+	          hasOrphan = true;
+	          break;
+	        }
+	      }
 
+	      if (hasOrphan) {
+	        var event = window.CustomEvent;
 
-	    map.minzoom = function(val) {
-	        if (!arguments.length) { return _minzoom; }
-	        _minzoom = val;
-	        return map;
-	    };
+	        if (event) {
+	          event = new event('mouseup');
+	        } else {
+	          event = window.document.createEvent('Event');
+	          event.initEvent('mouseup', false, false);
+	        } // Event needs to be dispatched with an event.view property.
 
 
-	    map.toggleHighlightEdited = function() {
-	        surface.classed('highlight-edited', !surface.classed('highlight-edited'));
-	        map.pan([0,0]);  // trigger a redraw
-	        dispatch$1.call('changeHighlighting', this);
-	    };
+	        event.view = window;
+	        window.dispatchEvent(event);
+	      }
+	    }
 
+	    return d3_event.button !== 2; // ignore right clicks
+	  }
 
-	    map.areaFillOptions = ['wireframe', 'partial', 'full'];
+	  function pxCenter() {
+	    return [_dimensions[0] / 2, _dimensions[1] / 2];
+	  }
 
-	    map.activeAreaFill = function(val) {
-	        if (!arguments.length) { return corePreferences('area-fill') || 'partial'; }
+	  function drawEditable(difference, extent) {
+	    var mode = context.mode();
+	    var graph = context.graph();
+	    var features = context.features();
+	    var all = context.history().intersects(map.extent());
+	    var fullRedraw = false;
+	    var data;
+	    var set;
+	    var filter;
+	    var applyFeatureLayerFilters = true;
+
+	    if (map.isInWideSelection()) {
+	      data = [];
+	      utilEntityAndDeepMemberIDs(mode.selectedIDs(), context.graph()).forEach(function (id) {
+	        var entity = context.hasEntity(id);
+	        if (entity) data.push(entity);
+	      });
+	      fullRedraw = true;
+	      filter = utilFunctor(true); // selected features should always be visible, so we can skip filtering
 
-	        corePreferences('area-fill', val);
-	        if (val !== 'wireframe') {
-	            corePreferences('area-fill-toggle', val);
-	        }
-	        updateAreaFill();
-	        map.pan([0,0]);  // trigger a redraw
-	        dispatch$1.call('changeAreaFill', this);
-	        return map;
-	    };
+	      applyFeatureLayerFilters = false;
+	    } else if (difference) {
+	      var complete = difference.complete(map.extent());
+	      data = Object.values(complete).filter(Boolean);
+	      set = new Set(Object.keys(complete));
 
-	    map.toggleWireframe = function() {
+	      filter = function filter(d) {
+	        return set.has(d.id);
+	      };
 
-	        var activeFill = map.activeAreaFill();
+	      features.clear(data);
+	    } else {
+	      // force a full redraw if gatherStats detects that a feature
+	      // should be auto-hidden (e.g. points or buildings)..
+	      if (features.gatherStats(all, graph, _dimensions)) {
+	        extent = undefined;
+	      }
 
-	        if (activeFill === 'wireframe') {
-	            activeFill = corePreferences('area-fill-toggle') || 'partial';
-	        } else {
-	            activeFill = 'wireframe';
-	        }
+	      if (extent) {
+	        data = context.history().intersects(map.extent().intersection(extent));
+	        set = new Set(data.map(function (entity) {
+	          return entity.id;
+	        }));
 
-	        map.activeAreaFill(activeFill);
-	    };
+	        filter = function filter(d) {
+	          return set.has(d.id);
+	        };
+	      } else {
+	        data = all;
+	        fullRedraw = true;
+	        filter = utilFunctor(true);
+	      }
+	    }
 
-	    function updateAreaFill() {
-	        var activeFill = map.activeAreaFill();
-	        map.areaFillOptions.forEach(function(opt) {
-	            surface.classed('fill-' + opt, Boolean(opt === activeFill));
-	        });
+	    if (applyFeatureLayerFilters) {
+	      data = features.filter(data, graph);
+	    } else {
+	      context.features().resetStats();
 	    }
 
+	    if (mode && mode.id === 'select') {
+	      // update selected vertices - the user might have just double-clicked a way,
+	      // creating a new vertex, triggering a partial redraw without a mode change
+	      surface.call(drawVertices.drawSelected, graph, map.extent());
+	    }
 
-	    map.layers = function () { return drawLayers; };
+	    surface.call(drawVertices, graph, data, filter, map.extent(), fullRedraw).call(drawLines, graph, data, filter).call(drawAreas, graph, data, filter).call(drawMidpoints, graph, data, filter, map.trimmedExtent()).call(drawLabels, graph, data, filter, _dimensions, fullRedraw).call(drawPoints, graph, data, filter);
+	    dispatch.call('drawn', this, {
+	      full: true
+	    });
+	  }
 
+	  map.init = function () {
+	    drawLayers = svgLayers(projection, context);
+	    drawPoints = svgPoints(projection, context);
+	    drawVertices = svgVertices(projection, context);
+	    drawLines = svgLines(projection, context);
+	    drawAreas = svgAreas(projection, context);
+	    drawMidpoints = svgMidpoints(projection, context);
+	    drawLabels = svgLabels(projection, context);
+	  };
 
-	    map.doubleUpHandler = function() {
-	        return _doubleUpHandler;
+	  function editOff() {
+	    context.features().resetStats();
+	    surface.selectAll('.layer-osm *').remove();
+	    surface.selectAll('.layer-touch:not(.markers) *').remove();
+	    var allowed = {
+	      'browse': true,
+	      'save': true,
+	      'select-note': true,
+	      'select-data': true,
+	      'select-error': true
 	    };
+	    var mode = context.mode();
 
+	    if (mode && !allowed[mode.id]) {
+	      context.enter(modeBrowse(context));
+	    }
 
-	    return utilRebind(map, dispatch$1, 'on');
-	}
-
-	function rendererPhotos(context) {
-	    var dispatch$1 = dispatch('change');
-	    var _layerIDs = ['streetside', 'mapillary', 'mapillary-map-features', 'mapillary-signs', 'openstreetcam'];
-	    var _allPhotoTypes = ['flat', 'panoramic'];
-	    var _shownPhotoTypes = _allPhotoTypes.slice();   // shallow copy
-
-	    function photos() {}
-
-	    function updateStorage() {
-	        if (window.mocha) { return; }
+	    dispatch.call('drawn', this, {
+	      full: true
+	    });
+	  }
 
-	        var hash = utilStringQs(window.location.hash);
-	        var enabled = context.layers().all().filter(function(d) {
-	            return _layerIDs.indexOf(d.id) !== -1 && d.layer && d.layer.supported() && d.layer.enabled();
-	        }).map(function(d) {
-	            return d.id;
-	        });
-	        if (enabled.length) {
-	            hash.photo_overlay = enabled.join(',');
+	  function gestureChange(d3_event) {
+	    // Remap Safari gesture events to wheel events - #5492
+	    // We want these disabled most places, but enabled for zoom/unzoom on map surface
+	    // https://developer.mozilla.org/en-US/docs/Web/API/GestureEvent
+	    var e = d3_event;
+	    e.preventDefault();
+	    var props = {
+	      deltaMode: 0,
+	      // dummy values to ignore in zoomPan
+	      deltaY: 1,
+	      // dummy values to ignore in zoomPan
+	      clientX: e.clientX,
+	      clientY: e.clientY,
+	      screenX: e.screenX,
+	      screenY: e.screenY,
+	      x: e.x,
+	      y: e.y
+	    };
+	    var e2 = new WheelEvent('wheel', props);
+	    e2._scale = e.scale; // preserve the original scale
+
+	    e2._rotation = e.rotation; // preserve the original rotation
+
+	    _selection.node().dispatchEvent(e2);
+	  }
+
+	  function zoomPan(event, key, transform) {
+	    var source = event && event.sourceEvent || event;
+	    var eventTransform = transform || event && event.transform;
+	    var x = eventTransform.x;
+	    var y = eventTransform.y;
+	    var k = eventTransform.k; // Special handling of 'wheel' events:
+	    // They might be triggered by the user scrolling the mouse wheel,
+	    // or 2-finger pinch/zoom gestures, the transform may need adjustment.
+
+	    if (source && source.type === 'wheel') {
+	      // assume that the gesture is already handled by pointer events
+	      if (_pointerDown) return;
+	      var detected = utilDetect();
+	      var dX = source.deltaX;
+	      var dY = source.deltaY;
+	      var x2 = x;
+	      var y2 = y;
+	      var k2 = k;
+	      var t0, p0, p1; // Normalize mousewheel scroll speed (Firefox) - #3029
+	      // If wheel delta is provided in LINE units, recalculate it in PIXEL units
+	      // We are essentially redoing the calculations that occur here:
+	      //   https://github.com/d3/d3-zoom/blob/78563a8348aa4133b07cac92e2595c2227ca7cd7/src/zoom.js#L203
+	      // See this for more info:
+	      //   https://github.com/basilfx/normalize-wheel/blob/master/src/normalizeWheel.js
+
+	      if (source.deltaMode === 1
+	      /* LINE */
+	      ) {
+	          // Convert from lines to pixels, more if the user is scrolling fast.
+	          // (I made up the exp function to roughly match Firefox to what Chrome does)
+	          // These numbers should be floats, because integers are treated as pan gesture below.
+	          var lines = Math.abs(source.deltaY);
+	          var sign = source.deltaY > 0 ? 1 : -1;
+	          dY = sign * clamp$1(Math.exp((lines - 1) * 0.75) * 4.000244140625, 4.000244140625, // min
+	          350.000244140625 // max
+	          ); // On Firefox Windows and Linux we always get +/- the scroll line amount (default 3)
+	          // There doesn't seem to be any scroll acceleration.
+	          // This multiplier increases the speed a little bit - #5512
+
+	          if (detected.os !== 'mac') {
+	            dY *= 5;
+	          } // recalculate x2,y2,k2
+
+
+	          t0 = _isTransformed ? _transformLast : _transformStart;
+	          p0 = _getMouseCoords(source);
+	          p1 = t0.invert(p0);
+	          k2 = t0.k * Math.pow(2, -dY / 500);
+	          k2 = clamp$1(k2, kMin, kMax);
+	          x2 = p0[0] - p1[0] * k2;
+	          y2 = p0[1] - p1[1] * k2; // 2 finger map pinch zooming (Safari) - #5492
+	          // These are fake `wheel` events we made from Safari `gesturechange` events..
+	        } else if (source._scale) {
+	        // recalculate x2,y2,k2
+	        t0 = _gestureTransformStart;
+	        p0 = _getMouseCoords(source);
+	        p1 = t0.invert(p0);
+	        k2 = t0.k * source._scale;
+	        k2 = clamp$1(k2, kMin, kMax);
+	        x2 = p0[0] - p1[0] * k2;
+	        y2 = p0[1] - p1[1] * k2; // 2 finger map pinch zooming (all browsers except Safari) - #5492
+	        // Pinch zooming via the `wheel` event will always have:
+	        // - `ctrlKey = true`
+	        // - `deltaY` is not round integer pixels (ignore `deltaX`)
+	      } else if (source.ctrlKey && !isInteger(dY)) {
+	        dY *= 6; // slightly scale up whatever the browser gave us
+	        // recalculate x2,y2,k2
+
+	        t0 = _isTransformed ? _transformLast : _transformStart;
+	        p0 = _getMouseCoords(source);
+	        p1 = t0.invert(p0);
+	        k2 = t0.k * Math.pow(2, -dY / 500);
+	        k2 = clamp$1(k2, kMin, kMax);
+	        x2 = p0[0] - p1[0] * k2;
+	        y2 = p0[1] - p1[1] * k2; // Trackpad scroll zooming with shift or alt/option key down
+	      } else if ((source.altKey || source.shiftKey) && isInteger(dY)) {
+	        // recalculate x2,y2,k2
+	        t0 = _isTransformed ? _transformLast : _transformStart;
+	        p0 = _getMouseCoords(source);
+	        p1 = t0.invert(p0);
+	        k2 = t0.k * Math.pow(2, -dY / 500);
+	        k2 = clamp$1(k2, kMin, kMax);
+	        x2 = p0[0] - p1[0] * k2;
+	        y2 = p0[1] - p1[1] * k2; // 2 finger map panning (Mac only, all browsers except Firefox #8595) - #5492, #5512
+	        // Panning via the `wheel` event will always have:
+	        // - `ctrlKey = false`
+	        // - `deltaX`,`deltaY` are round integer pixels
+	      } else if (detected.os === 'mac' && detected.browser !== 'Firefox' && !source.ctrlKey && isInteger(dX) && isInteger(dY)) {
+	        p1 = projection.translate();
+	        x2 = p1[0] - dX;
+	        y2 = p1[1] - dY;
+	        k2 = projection.scale();
+	        k2 = clamp$1(k2, kMin, kMax);
+	      } // something changed - replace the event transform
+
+
+	      if (x2 !== x || y2 !== y || k2 !== k) {
+	        x = x2;
+	        y = y2;
+	        k = k2;
+	        eventTransform = identity$2.translate(x2, y2).scale(k2);
+
+	        if (_zoomerPanner._transform) {
+	          // utilZoomPan interface
+	          _zoomerPanner._transform(eventTransform);
 	        } else {
-	            delete hash.photo_overlay;
+	          // d3_zoom interface
+	          _selection.node().__zoom = eventTransform;
 	        }
-	        window.location.replace('#' + utilQsString(hash, true));
+	      }
 	    }
 
-	    photos.overlayLayerIDs = function() {
-	        return _layerIDs;
-	    };
-
-	    photos.allPhotoTypes = function() {
-	        return _allPhotoTypes;
-	    };
+	    if (_transformStart.x === x && _transformStart.y === y && _transformStart.k === k) {
+	      return; // no change
+	    }
 
-	    function showsLayer(id) {
-	        var layer = context.layers().layer(id);
-	        return layer && layer.supported() && layer.enabled();
+	    if (geoScaleToZoom(k, TILESIZE) < _minzoom) {
+	      surface.interrupt();
+	      dispatch.call('hitMinZoom', this, map);
+	      setCenterZoom(map.center(), context.minEditableZoom(), 0, true);
+	      scheduleRedraw();
+	      dispatch.call('move', this, map);
+	      return;
 	    }
 
-	    photos.shouldFilterByPhotoType = function() {
-	        return showsLayer('mapillary') ||
-	            (showsLayer('streetside') && showsLayer('openstreetcam'));
-	    };
+	    projection.transform(eventTransform);
+	    var withinEditableZoom = map.withinEditableZoom();
 
-	    photos.showsPhotoType = function(val) {
-	        if (!photos.shouldFilterByPhotoType()) { return true; }
+	    if (_lastWithinEditableZoom !== withinEditableZoom) {
+	      if (_lastWithinEditableZoom !== undefined) {
+	        // notify that the map zoomed in or out over the editable zoom threshold
+	        dispatch.call('crossEditableZoom', this, withinEditableZoom);
+	      }
 
-	        return _shownPhotoTypes.indexOf(val) !== -1;
-	    };
+	      _lastWithinEditableZoom = withinEditableZoom;
+	    }
 
-	    photos.showsFlat = function() {
-	        return photos.showsPhotoType('flat');
-	    };
+	    var scale = k / _transformStart.k;
+	    var tX = (x / scale - _transformStart.x) * scale;
+	    var tY = (y / scale - _transformStart.y) * scale;
 
-	    photos.showsPanoramic = function() {
-	        return photos.showsPhotoType('panoramic');
-	    };
+	    if (context.inIntro()) {
+	      curtainProjection.transform({
+	        x: x - tX,
+	        y: y - tY,
+	        k: k
+	      });
+	    }
 
-	    photos.togglePhotoType = function(val) {
-	        var index = _shownPhotoTypes.indexOf(val);
-	        if (index !== -1) {
-	            _shownPhotoTypes.splice(index, 1);
-	        } else {
-	            _shownPhotoTypes.push(val);
-	        }
-	        dispatch$1.call('change', this);
-	        return photos;
-	    };
+	    if (source) {
+	      _lastPointerEvent = event;
+	    }
 
-	    photos.init = function() {
-	        var hash = utilStringQs(window.location.hash);
-	        if (hash.photo_overlay) {
-	            var hashOverlayIDs = hash.photo_overlay.replace(/;/g, ',').split(',');
-	            hashOverlayIDs.forEach(function(id) {
-	                var layer = context.layers().layer(id);
-	                if (layer) { layer.enabled(true); }
-	            });
-	        }
+	    _isTransformed = true;
+	    _transformLast = eventTransform;
+	    utilSetTransform(supersurface, tX, tY, scale);
+	    scheduleRedraw();
+	    dispatch.call('move', this, map);
 
-	        context.layers().on('change.rendererPhotos', updateStorage);
-	    };
+	    function isInteger(val) {
+	      return typeof val === 'number' && isFinite(val) && Math.floor(val) === val;
+	    }
+	  }
 
-	    return utilRebind(photos, dispatch$1, 'on');
-	}
+	  function resetTransform() {
+	    if (!_isTransformed) return false;
+	    utilSetTransform(supersurface, 0, 0);
+	    _isTransformed = false;
 
-	function uiAccount(context) {
-	    var osm = context.connection();
+	    if (context.inIntro()) {
+	      curtainProjection.transform(projection.transform());
+	    }
 
+	    return true;
+	  }
 
-	    function update(selection) {
-	        if (!osm) { return; }
+	  function redraw(difference, extent) {
+	    if (surface.empty() || !_redrawEnabled) return; // If we are in the middle of a zoom/pan, we can't do differenced redraws.
+	    // It would result in artifacts where differenced entities are redrawn with
+	    // one transform and unchanged entities with another.
 
-	        if (!osm.authenticated()) {
-	            selection.selectAll('.userLink, .logoutLink')
-	                .classed('hide', true);
-	            return;
-	        }
+	    if (resetTransform()) {
+	      difference = extent = undefined;
+	    }
 
-	        osm.userDetails(function(err, details) {
-	            var userLink = selection.select('.userLink'),
-	                logoutLink = selection.select('.logoutLink');
+	    var zoom = map.zoom();
+	    var z = String(~~zoom);
 
-	            userLink.html('');
-	            logoutLink.html('');
+	    if (surface.attr('data-zoom') !== z) {
+	      surface.attr('data-zoom', z);
+	    } // class surface as `lowzoom` around z17-z18.5 (based on latitude)
 
-	            if (err || !details) { return; }
 
-	            selection.selectAll('.userLink, .logoutLink')
-	                .classed('hide', false);
+	    var lat = map.center()[1];
+	    var lowzoom = linear().domain([-60, 0, 60]).range([17, 18.5, 17]).clamp(true);
+	    surface.classed('low-zoom', zoom <= lowzoom(lat));
 
-	            // Link
-	            userLink.append('a')
-	                .attr('href', osm.userURL(details.display_name))
-	                .attr('target', '_blank');
+	    if (!difference) {
+	      supersurface.call(context.background());
+	      wrapper.call(drawLayers);
+	    } // OSM
 
-	            // Add thumbnail or dont
-	            if (details.image_url) {
-	                userLink.append('img')
-	                    .attr('class', 'icon pre-text user-icon')
-	                    .attr('src', details.image_url);
-	            } else {
-	                userLink
-	                    .call(svgIcon('#iD-icon-avatar', 'pre-text light'));
-	            }
 
-	            // Add user name
-	            userLink.append('span')
-	                .attr('class', 'label')
-	                .text(details.display_name);
-
-	            logoutLink.append('a')
-	                .attr('class', 'logout')
-	                .attr('href', '#')
-	                .text(_t('logout'))
-	                .on('click.logout', function() {
-	                    event.preventDefault();
-	                    osm.logout();
-	                });
-	        });
+	    if (map.editableDataEnabled() || map.isInWideSelection()) {
+	      context.loadTiles(projection);
+	      drawEditable(difference, extent);
+	    } else {
+	      editOff();
 	    }
 
+	    _transformStart = projection.transform();
+	    return map;
+	  }
 
-	    return function(selection) {
-	        selection.append('li')
-	            .attr('class', 'logoutLink')
-	            .classed('hide', true);
-
-	        selection.append('li')
-	            .attr('class', 'userLink')
-	            .classed('hide', true);
+	  var immediateRedraw = function immediateRedraw(difference, extent) {
+	    if (!difference && !extent) cancelPendingRedraw();
+	    redraw(difference, extent);
+	  };
 
-	        if (osm) {
-	            osm.on('change.account', function() { update(selection); });
-	            update(selection);
-	        }
-	    };
-	}
+	  map.lastPointerEvent = function () {
+	    return _lastPointerEvent;
+	  };
 
-	function uiAttribution(context) {
-	  var _selection = select(null);
+	  map.mouse = function (d3_event) {
+	    var event = d3_event || _lastPointerEvent;
 
+	    if (event) {
+	      var s;
 
-	  function render(selection, data, klass) {
-	    var div = selection.selectAll(("." + klass))
-	      .data([0]);
+	      while (s = event.sourceEvent) {
+	        event = s;
+	      }
 
-	    div = div.enter()
-	      .append('div')
-	      .attr('class', klass)
-	      .merge(div);
+	      return _getMouseCoords(event);
+	    }
 
+	    return null;
+	  }; // returns Lng/Lat
 
-	    var attributions = div.selectAll('.attribution')
-	      .data(data, function (d) { return d.id; });
 
-	    attributions.exit()
-	      .remove();
+	  map.mouseCoordinates = function () {
+	    var coord = map.mouse() || pxCenter();
+	    return projection.invert(coord);
+	  };
 
-	    attributions = attributions.enter()
-	      .append('span')
-	      .attr('class', 'attribution')
-	      .each(function (d, i, nodes) {
-	        var attribution = select(nodes[i]);
+	  map.dblclickZoomEnable = function (val) {
+	    if (!arguments.length) return _dblClickZoomEnabled;
+	    _dblClickZoomEnabled = val;
+	    return map;
+	  };
 
-	        if (d.terms_html) {
-	          attribution.html(d.terms_html);
-	          return;
-	        }
+	  map.redrawEnable = function (val) {
+	    if (!arguments.length) return _redrawEnabled;
+	    _redrawEnabled = val;
+	    return map;
+	  };
 
-	        if (d.terms_url) {
-	          attribution = attribution
-	            .append('a')
-	            .attr('href', d.terms_url)
-	            .attr('target', '_blank');
-	        }
+	  map.isTransformed = function () {
+	    return _isTransformed;
+	  };
 
-	        var sourceID = d.id.replace(/\./g, '<TX_DOT>');
-	        var terms_text = _t(("imagery." + sourceID + ".attribution.text"),
-	          { default: d.terms_text || d.id || d.name() }
-	        );
+	  function setTransform(t2, duration, force) {
+	    var t = projection.transform();
+	    if (!force && t2.k === t.k && t2.x === t.x && t2.y === t.y) return false;
 
-	        if (d.icon && !d.overlay) {
-	          attribution
-	            .append('img')
-	            .attr('class', 'source-image')
-	            .attr('src', d.icon);
-	        }
+	    if (duration) {
+	      _selection.transition().duration(duration).on('start', function () {
+	        map.startEase();
+	      }).call(_zoomerPanner.transform, identity$2.translate(t2.x, t2.y).scale(t2.k));
+	    } else {
+	      projection.transform(t2);
+	      _transformStart = t2;
 
-	        attribution
-	          .append('span')
-	          .attr('class', 'attribution-text')
-	          .text(terms_text);
-	      })
-	      .merge(attributions);
+	      _selection.call(_zoomerPanner.transform, _transformStart);
+	    }
 
+	    return true;
+	  }
 
-	    var copyright = attributions.selectAll('.copyright-notice')
-	      .data(function (d) {
-	        var notice = d.copyrightNotices(context.map().zoom(), context.map().extent());
-	        return notice ? [notice] : [];
-	      });
+	  function setCenterZoom(loc2, z2, duration, force) {
+	    var c = map.center();
+	    var z = map.zoom();
+	    if (loc2[0] === c[0] && loc2[1] === c[1] && z2 === z && !force) return false;
+	    var proj = geoRawMercator().transform(projection.transform()); // copy projection
+
+	    var k2 = clamp$1(geoZoomToScale(z2, TILESIZE), kMin, kMax);
+	    proj.scale(k2);
+	    var t = proj.translate();
+	    var point = proj(loc2);
+	    var center = pxCenter();
+	    t[0] += center[0] - point[0];
+	    t[1] += center[1] - point[1];
+	    return setTransform(identity$2.translate(t[0], t[1]).scale(k2), duration, force);
+	  }
+
+	  map.pan = function (delta, duration) {
+	    var t = projection.translate();
+	    var k = projection.scale();
+	    t[0] += delta[0];
+	    t[1] += delta[1];
+
+	    if (duration) {
+	      _selection.transition().duration(duration).on('start', function () {
+	        map.startEase();
+	      }).call(_zoomerPanner.transform, identity$2.translate(t[0], t[1]).scale(k));
+	    } else {
+	      projection.translate(t);
+	      _transformStart = projection.transform();
 
-	    copyright.exit()
-	      .remove();
+	      _selection.call(_zoomerPanner.transform, _transformStart);
 
-	    copyright = copyright.enter()
-	      .append('span')
-	      .attr('class', 'copyright-notice')
-	      .merge(copyright);
+	      dispatch.call('move', this, map);
+	      immediateRedraw();
+	    }
 
-	    copyright
-	      .text(String);
-	  }
+	    return map;
+	  };
 
+	  map.dimensions = function (val) {
+	    if (!arguments.length) return _dimensions;
+	    _dimensions = val;
+	    drawLayers.dimensions(_dimensions);
+	    context.background().dimensions(_dimensions);
+	    projection.clipExtent([[0, 0], _dimensions]);
+	    _getMouseCoords = utilFastMouse(supersurface.node());
+	    scheduleRedraw();
+	    return map;
+	  };
 
-	  function update() {
-	    var baselayer = context.background().baseLayerSource();
-	    _selection
-	      .call(render, (baselayer ? [baselayer] : []), 'base-layer-attribution');
+	  function zoomIn(delta) {
+	    setCenterZoom(map.center(), ~~map.zoom() + delta, 250, true);
+	  }
 
-	    var z = context.map().zoom();
-	    var overlays = context.background().overlayLayerSources() || [];
-	    _selection
-	      .call(render, overlays.filter(function (s) { return s.validZoom(z); }), 'overlay-layer-attribution');
+	  function zoomOut(delta) {
+	    setCenterZoom(map.center(), ~~map.zoom() - delta, 250, true);
 	  }
 
+	  map.zoomIn = function () {
+	    zoomIn(1);
+	  };
 
-	  return function(selection) {
-	    _selection = selection;
+	  map.zoomInFurther = function () {
+	    zoomIn(4);
+	  };
 
-	    context.background()
-	      .on('change.attribution', update);
+	  map.canZoomIn = function () {
+	    return map.zoom() < maxZoom;
+	  };
 
-	    context.map()
-	      .on('move.attribution', throttle(update, 400, { leading: false }));
+	  map.zoomOut = function () {
+	    zoomOut(1);
+	  };
 
-	    update();
+	  map.zoomOutFurther = function () {
+	    zoomOut(4);
 	  };
-	}
 
-	function uiContributors(context) {
-	    var osm = context.connection(),
-	        debouncedUpdate = debounce(function() { update(); }, 1000),
-	        limit = 4,
-	        hidden = false,
-	        wrap = select(null);
+	  map.canZoomOut = function () {
+	    return map.zoom() > minZoom;
+	  };
+
+	  map.center = function (loc2) {
+	    if (!arguments.length) {
+	      return projection.invert(pxCenter());
+	    }
 
+	    if (setCenterZoom(loc2, map.zoom())) {
+	      dispatch.call('move', this, map);
+	    }
 
-	    function update() {
-	        if (!osm) { return; }
+	    scheduleRedraw();
+	    return map;
+	  };
 
-	        var users = {},
-	            entities = context.history().intersects(context.map().extent());
+	  map.unobscuredCenterZoomEase = function (loc, zoom) {
+	    var offset = map.unobscuredOffsetPx();
+	    var proj = geoRawMercator().transform(projection.transform()); // copy projection
+	    // use the target zoom to calculate the offset center
 
-	        entities.forEach(function(entity) {
-	            if (entity && entity.user) { users[entity.user] = true; }
-	        });
+	    proj.scale(geoZoomToScale(zoom, TILESIZE));
+	    var locPx = proj(loc);
+	    var offsetLocPx = [locPx[0] + offset[0], locPx[1] + offset[1]];
+	    var offsetLoc = proj.invert(offsetLocPx);
+	    map.centerZoomEase(offsetLoc, zoom);
+	  };
 
-	        var u = Object.keys(users),
-	            subset = u.slice(0, u.length > limit ? limit - 1 : limit);
+	  map.unobscuredOffsetPx = function () {
+	    var openPane = context.container().select('.map-panes .map-pane.shown');
 
-	        wrap.html('')
-	            .call(svgIcon('#iD-icon-nearby', 'pre-text light'));
+	    if (!openPane.empty()) {
+	      return [openPane.node().offsetWidth / 2, 0];
+	    }
 
-	        var userList = select(document.createElement('span'));
+	    return [0, 0];
+	  };
 
-	        userList.selectAll()
-	            .data(subset)
-	            .enter()
-	            .append('a')
-	            .attr('class', 'user-link')
-	            .attr('href', function(d) { return osm.userURL(d); })
-	            .attr('target', '_blank')
-	            .text(String);
-
-	        if (u.length > limit) {
-	            var count = select(document.createElement('span'));
-
-	            count.append('a')
-	                .attr('target', '_blank')
-	                .attr('href', function() {
-	                    return osm.changesetsURL(context.map().center(), context.map().zoom());
-	                })
-	                .text(u.length - limit + 1);
+	  map.zoom = function (z2) {
+	    if (!arguments.length) {
+	      return Math.max(geoScaleToZoom(projection.scale(), TILESIZE), 0);
+	    }
 
-	            wrap.append('span')
-	                .html(_t('contributors.truncated_list', { users: userList.html(), count: count.html() }));
+	    if (z2 < _minzoom) {
+	      surface.interrupt();
+	      dispatch.call('hitMinZoom', this, map);
+	      z2 = context.minEditableZoom();
+	    }
 
-	        } else {
-	            wrap.append('span')
-	                .html(_t('contributors.list', { users: userList.html() }));
-	        }
+	    if (setCenterZoom(map.center(), z2)) {
+	      dispatch.call('move', this, map);
+	    }
 
-	        if (!u.length) {
-	            hidden = true;
-	            wrap
-	                .transition()
-	                .style('opacity', 0);
+	    scheduleRedraw();
+	    return map;
+	  };
 
-	        } else if (hidden) {
-	            wrap
-	                .transition()
-	                .style('opacity', 1);
-	        }
+	  map.centerZoom = function (loc2, z2) {
+	    if (setCenterZoom(loc2, z2)) {
+	      dispatch.call('move', this, map);
 	    }
 
+	    scheduleRedraw();
+	    return map;
+	  };
 
-	    return function(selection) {
-	        if (!osm) { return; }
-	        wrap = selection;
-	        update();
+	  map.zoomTo = function (entity) {
+	    var extent = entity.extent(context.graph());
+	    if (!isFinite(extent.area())) return map;
+	    var z2 = clamp$1(map.trimmedExtentZoom(extent), 0, 20);
+	    return map.centerZoom(extent.center(), z2);
+	  };
 
-	        osm.on('loaded.contributors', debouncedUpdate);
-	        context.map().on('move.contributors', debouncedUpdate);
-	    };
-	}
+	  map.centerEase = function (loc2, duration) {
+	    duration = duration || 250;
+	    setCenterZoom(loc2, map.zoom(), duration);
+	    return map;
+	  };
 
-	var _popoverID = 0;
+	  map.zoomEase = function (z2, duration) {
+	    duration = duration || 250;
+	    setCenterZoom(map.center(), z2, duration, false);
+	    return map;
+	  };
 
-	function uiPopover(klass) {
-	    var _id = _popoverID++;
-	    var _anchorSelection = select(null);
-	    var popover = function(selection) {
-	        _anchorSelection = selection;
-	        selection.each(setup);
-	    };
-	    var _animation = utilFunctor(false);
-	    var _placement = utilFunctor('top'); // top, bottom, left, right
-	    var _alignment = utilFunctor('center');  // leading, center, trailing
-	    var _scrollContainer = utilFunctor(select(null));
-	    var _content;
-	    var _displayType = utilFunctor('');
-	    var _hasArrow = utilFunctor(true);
-
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
-
-	    popover.displayType = function(val) {
-	        if (arguments.length) {
-	            _displayType = utilFunctor(val);
-	            return popover;
-	        } else {
-	            return _displayType;
-	        }
-	    };
+	  map.centerZoomEase = function (loc2, z2, duration) {
+	    duration = duration || 250;
+	    setCenterZoom(loc2, z2, duration, false);
+	    return map;
+	  };
 
-	    popover.hasArrow = function(val) {
-	        if (arguments.length) {
-	            _hasArrow = utilFunctor(val);
-	            return popover;
-	        } else {
-	            return _hasArrow;
-	        }
-	    };
+	  map.transformEase = function (t2, duration) {
+	    duration = duration || 250;
+	    setTransform(t2, duration, false
+	    /* don't force */
+	    );
+	    return map;
+	  };
 
-	    popover.placement = function(val) {
-	        if (arguments.length) {
-	            _placement = utilFunctor(val);
-	            return popover;
-	        } else {
-	            return _placement;
-	        }
-	    };
+	  map.zoomToEase = function (obj, duration) {
+	    var extent;
 
-	    popover.alignment = function(val) {
-	        if (arguments.length) {
-	            _alignment = utilFunctor(val);
-	            return popover;
-	        } else {
-	            return _alignment;
-	        }
-	    };
+	    if (Array.isArray(obj)) {
+	      obj.forEach(function (entity) {
+	        var entityExtent = entity.extent(context.graph());
 
-	    popover.scrollContainer = function(val) {
-	        if (arguments.length) {
-	            _scrollContainer = utilFunctor(val);
-	            return popover;
+	        if (!extent) {
+	          extent = entityExtent;
 	        } else {
-	            return _scrollContainer;
+	          extent = extent.extend(entityExtent);
 	        }
-	    };
+	      });
+	    } else {
+	      extent = obj.extent(context.graph());
+	    }
 
-	    popover.content = function(val) {
-	        if (arguments.length) {
-	            _content = val;
-	            return popover;
-	        } else {
-	            return _content;
-	        }
-	    };
+	    if (!isFinite(extent.area())) return map;
+	    var z2 = clamp$1(map.trimmedExtentZoom(extent), 0, 20);
+	    return map.centerZoomEase(extent.center(), z2, duration);
+	  };
 
-	    popover.isShown = function() {
-	        var popoverSelection = _anchorSelection.select('.popover-' + _id);
-	        return !popoverSelection.empty() && popoverSelection.classed('in');
-	    };
+	  map.startEase = function () {
+	    utilBindOnce(surface, _pointerPrefix + 'down.ease', function () {
+	      map.cancelEase();
+	    });
+	    return map;
+	  };
 
-	    popover.show = function() {
-	        _anchorSelection.each(show);
-	    };
+	  map.cancelEase = function () {
+	    _selection.interrupt();
 
-	    popover.updateContent = function() {
-	        _anchorSelection.each(updateContent);
-	    };
+	    return map;
+	  };
 
-	    popover.hide = function() {
-	        _anchorSelection.each(hide);
-	    };
+	  map.extent = function (val) {
+	    if (!arguments.length) {
+	      return new geoExtent(projection.invert([0, _dimensions[1]]), projection.invert([_dimensions[0], 0]));
+	    } else {
+	      var extent = geoExtent(val);
+	      map.centerZoom(extent.center(), map.extentZoom(extent));
+	    }
+	  };
 
-	    popover.toggle = function() {
-	        _anchorSelection.each(toggle);
-	    };
+	  map.trimmedExtent = function (val) {
+	    if (!arguments.length) {
+	      var headerY = 71;
+	      var footerY = 30;
+	      var pad = 10;
+	      return new geoExtent(projection.invert([pad, _dimensions[1] - footerY - pad]), projection.invert([_dimensions[0] - pad, headerY + pad]));
+	    } else {
+	      var extent = geoExtent(val);
+	      map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
+	    }
+	  };
 
-	    popover.destroy = function(selection, selector) {
-	        // by default, just destroy the current popover
-	        selector = selector || '.popover-' + _id;
-
-	        selection
-	            .on(_pointerPrefix + 'enter.popover', null)
-	            .on(_pointerPrefix + 'leave.popover', null)
-	            .on(_pointerPrefix + 'up.popover', null)
-	            .on(_pointerPrefix + 'down.popover', null)
-	            .on('click.popover', null)
-	            .attr('title', function() {
-	                return this.getAttribute('data-original-title') || this.getAttribute('title');
-	            })
-	            .attr('data-original-title', null)
-	            .selectAll(selector)
-	            .remove();
-	    };
+	  function calcExtentZoom(extent, dim) {
+	    var tl = projection([extent[0][0], extent[1][1]]);
+	    var br = projection([extent[1][0], extent[0][1]]); // Calculate maximum zoom that fits extent
 
+	    var hFactor = (br[0] - tl[0]) / dim[0];
+	    var vFactor = (br[1] - tl[1]) / dim[1];
+	    var hZoomDiff = Math.log(Math.abs(hFactor)) / Math.LN2;
+	    var vZoomDiff = Math.log(Math.abs(vFactor)) / Math.LN2;
+	    var newZoom = map.zoom() - Math.max(hZoomDiff, vZoomDiff);
+	    return newZoom;
+	  }
 
-	    popover.destroyAny = function(selection) {
-	        selection.call(popover.destroy, '.popover');
-	    };
+	  map.extentZoom = function (val) {
+	    return calcExtentZoom(geoExtent(val), _dimensions);
+	  };
 
-	    function setup() {
-	        var anchor = select(this);
-	        var animate = _animation.apply(this, arguments);
-	        var popoverSelection = anchor.selectAll('.popover-' + _id)
-	            .data([0]);
+	  map.trimmedExtentZoom = function (val) {
+	    var trimY = 120;
+	    var trimX = 40;
+	    var trimmed = [_dimensions[0] - trimX, _dimensions[1] - trimY];
+	    return calcExtentZoom(geoExtent(val), trimmed);
+	  };
 
+	  map.withinEditableZoom = function () {
+	    return map.zoom() >= context.minEditableZoom();
+	  };
 
-	        var enter = popoverSelection.enter()
-	            .append('div')
-	            .attr('class', 'popover popover-' + _id + ' ' + (klass ? klass : ''))
-	            .classed('arrowed', _hasArrow.apply(this, arguments));
+	  map.isInWideSelection = function () {
+	    return !map.withinEditableZoom() && context.selectedIDs().length;
+	  };
 
-	        enter
-	            .append('div')
-	            .attr('class', 'popover-arrow');
+	  map.editableDataEnabled = function (skipZoomCheck) {
+	    var layer = context.layers().layer('osm');
+	    if (!layer || !layer.enabled()) return false;
+	    return skipZoomCheck || map.withinEditableZoom();
+	  };
 
-	        enter
-	            .append('div')
-	            .attr('class', 'popover-inner');
+	  map.notesEditable = function () {
+	    var layer = context.layers().layer('notes');
+	    if (!layer || !layer.enabled()) return false;
+	    return map.withinEditableZoom();
+	  };
 
-	        popoverSelection = enter
-	            .merge(popoverSelection);
+	  map.minzoom = function (val) {
+	    if (!arguments.length) return _minzoom;
+	    _minzoom = val;
+	    return map;
+	  };
 
-	        if (animate) {
-	            popoverSelection.classed('fade', true);
-	        }
+	  map.toggleHighlightEdited = function () {
+	    surface.classed('highlight-edited', !surface.classed('highlight-edited'));
+	    map.pan([0, 0]); // trigger a redraw
 
-	        var display = _displayType.apply(this, arguments);
+	    dispatch.call('changeHighlighting', this);
+	  };
 
-	        if (display === 'hover') {
-	            var _lastNonMouseEnterTime;
-	            anchor.on(_pointerPrefix + 'enter.popover', function() {
+	  map.areaFillOptions = ['wireframe', 'partial', 'full'];
 
-	                if (event.pointerType) {
-	                    if (event.pointerType !== 'mouse') {
-	                        _lastNonMouseEnterTime = event.timeStamp;
-	                        // only allow hover behavior for mouse input
-	                        return;
-	                    } else if (_lastNonMouseEnterTime &&
-	                        event.timeStamp - _lastNonMouseEnterTime < 1500) {
-	                        // HACK: iOS 13.4 sends an erroneous `mouse` type pointerenter
-	                        // event for non-mouse interactions right after sending
-	                        // the correct type pointerenter event. Workaround by discarding
-	                        // any mouse event that occurs immediately after a non-mouse event.
-	                        return;
-	                    }
-	                }
+	  map.activeAreaFill = function (val) {
+	    if (!arguments.length) return corePreferences('area-fill') || 'partial';
+	    corePreferences('area-fill', val);
 
-	                // don't show if buttons are pressed, e.g. during click and drag of map
-	                if (event.buttons !== 0) { return; }
+	    if (val !== 'wireframe') {
+	      corePreferences('area-fill-toggle', val);
+	    }
 
-	                show.apply(this, arguments);
-	            });
-	            anchor.on(_pointerPrefix + 'leave.popover', function() {
-	                hide.apply(this, arguments);
-	            });
+	    updateAreaFill();
+	    map.pan([0, 0]); // trigger a redraw
 
-	        } else if (display === 'clickFocus') {
-	            anchor
-	                .on(_pointerPrefix + 'down.popover', function() {
-	                    event.preventDefault();
-	                    event.stopPropagation();
-	                })
-	                .on(_pointerPrefix + 'up.popover', function() {
-	                    event.preventDefault();
-	                    event.stopPropagation();
-	                })
-	                .on('click.popover', toggle);
+	    dispatch.call('changeAreaFill', this);
+	    return map;
+	  };
 
-	            popoverSelection
-	                .attr('tabindex', 0)
-	                .on('blur.popover', function() {
-	                    anchor.each(function() {
-	                        hide.apply(this, arguments);
-	                    });
-	                });
-	        }
-	    }
+	  map.toggleWireframe = function () {
+	    var activeFill = map.activeAreaFill();
 
+	    if (activeFill === 'wireframe') {
+	      activeFill = corePreferences('area-fill-toggle') || 'partial';
+	    } else {
+	      activeFill = 'wireframe';
+	    }
 
-	    function show() {
-	        var anchor = select(this);
-	        var popoverSelection = anchor.selectAll('.popover-' + _id);
+	    map.activeAreaFill(activeFill);
+	  };
 
-	        if (popoverSelection.empty()) {
-	            // popover was removed somehow, put it back
-	            anchor.call(popover.destroy);
-	            anchor.each(setup);
-	            popoverSelection = anchor.selectAll('.popover-' + _id);
-	        }
+	  function updateAreaFill() {
+	    var activeFill = map.activeAreaFill();
+	    map.areaFillOptions.forEach(function (opt) {
+	      surface.classed('fill-' + opt, Boolean(opt === activeFill));
+	    });
+	  }
 
-	        popoverSelection.classed('in', true);
+	  map.layers = function () {
+	    return drawLayers;
+	  };
 
-	        var displayType = _displayType.apply(this, arguments);
-	        if (displayType === 'clickFocus') {
-	            anchor.classed('active', true);
-	            popoverSelection.node().focus();
-	        }
+	  map.doubleUpHandler = function () {
+	    return _doubleUpHandler;
+	  };
 
-	        anchor.each(updateContent);
-	    }
+	  return utilRebind(map, dispatch, 'on');
+	}
 
-	    function updateContent() {
-	        var anchor = select(this);
+	function rendererPhotos(context) {
+	  var dispatch = dispatch$8('change');
+	  var _layerIDs = ['streetside', 'mapillary', 'mapillary-map-features', 'mapillary-signs', 'openstreetcam'];
+	  var _allPhotoTypes = ['flat', 'panoramic'];
 
-	        if (_content) {
-	            anchor.selectAll('.popover-' + _id + ' > .popover-inner')
-	                .call(_content.apply(this, arguments));
-	        }
+	  var _shownPhotoTypes = _allPhotoTypes.slice(); // shallow copy
 
-	        updatePosition.apply(this, arguments);
-	        // hack: update multiple times to fix instances where the absolute offset is
-	        // set before the dynamic popover size is calculated by the browser
-	        updatePosition.apply(this, arguments);
-	        updatePosition.apply(this, arguments);
-	    }
 
+	  var _dateFilters = ['fromDate', 'toDate'];
 
-	    function updatePosition() {
+	  var _fromDate;
 
-	        var anchor = select(this);
-	        var popoverSelection = anchor.selectAll('.popover-' + _id);
+	  var _toDate;
 
-	        var scrollContainer = _scrollContainer && _scrollContainer.apply(this, arguments);
-	        var scrollNode = scrollContainer && !scrollContainer.empty() && scrollContainer.node();
-	        var scrollLeft = scrollNode ? scrollNode.scrollLeft : 0;
-	        var scrollTop = scrollNode ? scrollNode.scrollTop : 0;
+	  var _usernames;
 
-	        var placement = _placement.apply(this, arguments);
-	        popoverSelection
-	            .classed('left', false)
-	            .classed('right', false)
-	            .classed('top', false)
-	            .classed('bottom', false)
-	            .classed(placement, true);
+	  function photos() {}
 
-	        var alignment = _alignment.apply(this, arguments);
-	        var alignFactor = 0.5;
-	        if (alignment === 'leading') {
-	            alignFactor = 0;
-	        } else if (alignment === 'trailing') {
-	            alignFactor = 1;
-	        }
-	        var anchorFrame = getFrame(anchor.node());
-	        var popoverFrame = getFrame(popoverSelection.node());
-	        var position;
+	  function updateStorage() {
+	    if (window.mocha) return;
+	    var hash = utilStringQs(window.location.hash);
+	    var enabled = context.layers().all().filter(function (d) {
+	      return _layerIDs.indexOf(d.id) !== -1 && d.layer && d.layer.supported() && d.layer.enabled();
+	    }).map(function (d) {
+	      return d.id;
+	    });
 
-	        switch (placement) {
-	            case 'top':
-	            position = {
-	                x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
-	                y: anchorFrame.y - popoverFrame.h
-	            };
-	            break;
-	            case 'bottom':
-	            position = {
-	                x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
-	                y: anchorFrame.y + anchorFrame.h
-	            };
-	            break;
-	            case 'left':
-	            position = {
-	                x: anchorFrame.x - popoverFrame.w,
-	                y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
-	            };
-	            break;
-	            case 'right':
-	            position = {
-	                x: anchorFrame.x + anchorFrame.w,
-	                y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
-	            };
-	            break;
-	        }
+	    if (enabled.length) {
+	      hash.photo_overlay = enabled.join(',');
+	    } else {
+	      delete hash.photo_overlay;
+	    }
 
-	        if (position) {
+	    window.location.replace('#' + utilQsString(hash, true));
+	  }
 
-	            if (scrollNode && (placement === 'top' || placement === 'bottom')) {
+	  photos.overlayLayerIDs = function () {
+	    return _layerIDs;
+	  };
 
-	                var initialPosX = position.x;
+	  photos.allPhotoTypes = function () {
+	    return _allPhotoTypes;
+	  };
 
-	                if (position.x + popoverFrame.w > scrollNode.offsetWidth - 10) {
-	                    position.x = scrollNode.offsetWidth - 10 - popoverFrame.w;
-	                } else if (position.x < 10) {
-	                    position.x = 10;
-	                }
+	  photos.dateFilters = function () {
+	    return _dateFilters;
+	  };
 
-	                var arrow = anchor.selectAll('.popover-' + _id + ' > .popover-arrow');
-	                // keep the arrow centered on the button, or as close as possible
-	                var arrowPosX = Math.min(Math.max(popoverFrame.w / 2 - (position.x - initialPosX), 10), popoverFrame.w - 10);
-	                arrow.style('left', ~~arrowPosX + 'px');
-	            }
+	  photos.dateFilterValue = function (val) {
+	    return val === _dateFilters[0] ? _fromDate : _toDate;
+	  };
 
-	            popoverSelection.style('left', ~~position.x + 'px').style('top', ~~position.y + 'px');
-	        } else {
-	            popoverSelection.style('left', null).style('top', null);
-	        }
+	  photos.setDateFilter = function (type, val, updateUrl) {
+	    // validate the date
+	    var date = val && new Date(val);
 
-	        function getFrame(node) {
-	            var positionStyle = select(node).style('position');
-	            if (positionStyle === 'absolute' || positionStyle === 'static') {
-	                return {
-	                    x: node.offsetLeft - scrollLeft,
-	                    y: node.offsetTop - scrollTop,
-	                    w: node.offsetWidth,
-	                    h: node.offsetHeight
-	                };
-	            } else {
-	                return {
-	                    x: 0,
-	                    y: 0,
-	                    w: node.offsetWidth,
-	                    h: node.offsetHeight
-	                };
-	            }
-	        }
+	    if (date && !isNaN(date)) {
+	      val = date.toISOString().substr(0, 10);
+	    } else {
+	      val = null;
 	    }
 
+	    if (type === _dateFilters[0]) {
+	      _fromDate = val;
 
-	    function hide() {
-	        var anchor = select(this);
-	        if (_displayType.apply(this, arguments) === 'clickFocus') {
-	            anchor.classed('active', false);
-	        }
-	        anchor.selectAll('.popover-' + _id).classed('in', false);
+	      if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
+	        _toDate = _fromDate;
+	      }
 	    }
 
+	    if (type === _dateFilters[1]) {
+	      _toDate = val;
 
-	    function toggle() {
-	        if (select(this).select('.popover-' + _id).classed('in')) {
-	            hide.apply(this, arguments);
-	        } else {
-	            show.apply(this, arguments);
-	        }
+	      if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
+	        _fromDate = _toDate;
+	      }
 	    }
 
+	    dispatch.call('change', this);
 
-	    return popover;
-	}
-
-	function uiTooltip(klass) {
+	    if (updateUrl) {
+	      var rangeString;
 
-	    var tooltip = uiPopover((klass || '') + ' tooltip')
-	        .displayType('hover');
+	      if (_fromDate || _toDate) {
+	        rangeString = (_fromDate || '') + '_' + (_toDate || '');
+	      }
 
-	    var _title = function() {
-	        var title = this.getAttribute('data-original-title');
-	        if (title) {
-	            return title;
-	        } else {
-	            title = this.getAttribute('title');
-	            this.removeAttribute('title');
-	            this.setAttribute('data-original-title', title);
-	        }
-	        return title;
-	    };
+	      setUrlFilterValue('photo_dates', rangeString);
+	    }
+	  };
 
-	    var _heading = utilFunctor(null);
-	    var _keys = utilFunctor(null);
+	  photos.setUsernameFilter = function (val, updateUrl) {
+	    if (val && typeof val === 'string') val = val.replace(/;/g, ',').split(',');
 
-	    tooltip.title = function(val) {
-	        if (!arguments.length) { return _title; }
-	        _title = utilFunctor(val);
-	        return tooltip;
-	    };
+	    if (val) {
+	      val = val.map(function (d) {
+	        return d.trim();
+	      }).filter(Boolean);
 
-	    tooltip.heading = function(val) {
-	        if (!arguments.length) { return _heading; }
-	        _heading = utilFunctor(val);
-	        return tooltip;
-	    };
+	      if (!val.length) {
+	        val = null;
+	      }
+	    }
 
-	    tooltip.keys = function(val) {
-	        if (!arguments.length) { return _keys; }
-	        _keys = utilFunctor(val);
-	        return tooltip;
-	    };
+	    _usernames = val;
+	    dispatch.call('change', this);
 
-	    tooltip.content(function() {
-	        var heading = _heading.apply(this, arguments);
-	        var text = _title.apply(this, arguments);
-	        var keys = _keys.apply(this, arguments);
+	    if (updateUrl) {
+	      var hashString;
 
-	        return function(selection) {
+	      if (_usernames) {
+	        hashString = _usernames.join(',');
+	      }
 
-	            var headingSelect = selection
-	                .selectAll('.tooltip-heading')
-	                .data(heading ? [heading] :[]);
+	      setUrlFilterValue('photo_username', hashString);
+	    }
+	  };
 
-	            headingSelect.exit()
-	                .remove();
+	  function setUrlFilterValue(property, val) {
+	    if (!window.mocha) {
+	      var hash = utilStringQs(window.location.hash);
 
-	            headingSelect.enter()
-	                .append('div')
-	                .attr('class', 'tooltip-heading')
-	                .merge(headingSelect)
-	                .html(heading);
+	      if (val) {
+	        if (hash[property] === val) return;
+	        hash[property] = val;
+	      } else {
+	        if (!(property in hash)) return;
+	        delete hash[property];
+	      }
 
-	            var textSelect = selection
-	                .selectAll('.tooltip-text')
-	                .data(text ? [text] :[]);
+	      window.location.replace('#' + utilQsString(hash, true));
+	    }
+	  }
 
-	            textSelect.exit()
-	                .remove();
+	  function showsLayer(id) {
+	    var layer = context.layers().layer(id);
+	    return layer && layer.supported() && layer.enabled();
+	  }
 
-	            textSelect.enter()
-	                .append('div')
-	                .attr('class', 'tooltip-text')
-	                .merge(textSelect)
-	                .html(text);
+	  photos.shouldFilterByDate = function () {
+	    return showsLayer('mapillary') || showsLayer('openstreetcam') || showsLayer('streetside');
+	  };
 
-	            var keyhintWrap = selection
-	                .selectAll('.keyhint-wrap')
-	                .data(keys && keys.length ? [0] : []);
+	  photos.shouldFilterByPhotoType = function () {
+	    return showsLayer('mapillary') || showsLayer('streetside') && showsLayer('openstreetcam');
+	  };
 
-	            keyhintWrap.exit()
-	                .remove();
+	  photos.shouldFilterByUsername = function () {
+	    return !showsLayer('mapillary') && showsLayer('openstreetcam') && !showsLayer('streetside');
+	  };
 
-	            var keyhintWrapEnter = keyhintWrap.enter()
-	                .append('div')
-	                .attr('class', 'keyhint-wrap');
+	  photos.showsPhotoType = function (val) {
+	    if (!photos.shouldFilterByPhotoType()) return true;
+	    return _shownPhotoTypes.indexOf(val) !== -1;
+	  };
 
-	            keyhintWrapEnter
-	                .append('span')
-	                .html(_t('tooltip_keyhint'));
+	  photos.showsFlat = function () {
+	    return photos.showsPhotoType('flat');
+	  };
 
-	            keyhintWrap = keyhintWrapEnter.merge(keyhintWrap);
+	  photos.showsPanoramic = function () {
+	    return photos.showsPhotoType('panoramic');
+	  };
 
-	            keyhintWrap.selectAll('kbd.shortcut')
-	                .data(keys && keys.length ? keys : [])
-	                .enter()
-	                .append('kbd')
-	                .attr('class', 'shortcut')
-	                .html(function(d) {
-	                    return d;
-	                });
-	        };
-	    });
+	  photos.fromDate = function () {
+	    return _fromDate;
+	  };
 
-	    return tooltip;
-	}
+	  photos.toDate = function () {
+	    return _toDate;
+	  };
 
-	function uiEditMenu(context) {
-	    var dispatch$1 = dispatch('toggled');
+	  photos.togglePhotoType = function (val) {
+	    var index = _shownPhotoTypes.indexOf(val);
 
-	    var _menu = select(null);
-	    var _operations = [];
-	    // the position the menu should be displayed relative to
-	    var _anchorLoc = [0, 0];
-	    var _anchorLocLonLat = [0, 0];
-	    // a string indicating how the menu was opened
-	    var _triggerType = '';
+	    if (index !== -1) {
+	      _shownPhotoTypes.splice(index, 1);
+	    } else {
+	      _shownPhotoTypes.push(val);
+	    }
 
-	    var _vpTopMargin = 85; // viewport top margin
-	    var _vpBottomMargin = 45; // viewport bottom margin
-	    var _vpSideMargin = 35;   // viewport side margin
+	    dispatch.call('change', this);
+	    return photos;
+	  };
 
-	    var _menuTop = false;
-	    var _menuHeight;
-	    var _menuWidth;
+	  photos.usernames = function () {
+	    return _usernames;
+	  };
 
-	    // hardcode these values to make menu positioning easier
-	    var _verticalPadding = 4;
+	  photos.init = function () {
+	    var hash = utilStringQs(window.location.hash);
 
-	    // see also `.edit-menu .tooltip` CSS; include margin
-	    var _tooltipWidth = 210;
+	    if (hash.photo_dates) {
+	      // expect format like `photo_dates=2019-01-01_2020-12-31`, but allow a couple different separators
+	      var parts = /^(.*)[–_](.*)$/g.exec(hash.photo_dates.trim());
+	      this.setDateFilter('fromDate', parts && parts.length >= 2 && parts[1], false);
+	      this.setDateFilter('toDate', parts && parts.length >= 3 && parts[2], false);
+	    }
 
-	    // offset the menu slightly from the target location
-	    var _menuSideMargin = 10;
+	    if (hash.photo_username) {
+	      this.setUsernameFilter(hash.photo_username, false);
+	    }
 
-	    var _tooltips = [];
+	    if (hash.photo_overlay) {
+	      // support enabling photo layers by default via a URL parameter, e.g. `photo_overlay=openstreetcam;mapillary;streetside`
+	      var hashOverlayIDs = hash.photo_overlay.replace(/;/g, ',').split(',');
+	      hashOverlayIDs.forEach(function (id) {
+	        var layer = _layerIDs.indexOf(id) !== -1 && context.layers().layer(id);
+	        if (layer && !layer.enabled()) layer.enabled(true);
+	      });
+	    }
 
-	    var editMenu = function(selection) {
+	    if (hash.photo) {
+	      // support opening a photo via a URL parameter, e.g. `photo=mapillary-fztgSDtLpa08ohPZFZjeRQ`
+	      var photoIds = hash.photo.replace(/;/g, ',').split(',');
+	      var photoId = photoIds.length && photoIds[0].trim();
+	      var results = /(.*)\/(.*)/g.exec(photoId);
+
+	      if (results && results.length >= 3) {
+	        var serviceId = results[1];
+	        var photoKey = results[2];
+	        var service = services[serviceId];
+
+	        if (service && service.ensureViewerLoaded) {
+	          // if we're showing a photo then make sure its layer is enabled too
+	          var layer = _layerIDs.indexOf(serviceId) !== -1 && context.layers().layer(serviceId);
+	          if (layer && !layer.enabled()) layer.enabled(true);
+	          var baselineTime = Date.now();
+	          service.on('loadedImages.rendererPhotos', function () {
+	            // don't open the viewer if too much time has elapsed
+	            if (Date.now() - baselineTime > 45000) {
+	              service.on('loadedImages.rendererPhotos', null);
+	              return;
+	            }
 
-	        var isTouchMenu = _triggerType.includes('touch') || _triggerType.includes('pen');
+	            if (!service.cachedImage(photoKey)) return;
+	            service.on('loadedImages.rendererPhotos', null);
+	            service.ensureViewerLoaded(context).then(function () {
+	              service.selectImage(context, photoKey).showViewer(context);
+	            });
+	          });
+	        }
+	      }
+	    }
 
-	        var ops = _operations.filter(function(op) {
-	            return !isTouchMenu || !op.mouseOnly;
-	        });
+	    context.layers().on('change.rendererPhotos', updateStorage);
+	  };
 
-	        if (!ops.length) { return; }
+	  return utilRebind(photos, dispatch, 'on');
+	}
 
-	        _tooltips = [];
+	function uiAccount(context) {
+	  var osm = context.connection();
 
-	        // Position the menu above the anchor for stylus and finger input
-	        // since the mapper's hand likely obscures the screen below the anchor
-	        _menuTop = isTouchMenu;
+	  function update(selection) {
+	    if (!osm) return;
 
-	        // Show labels for touch input since there aren't hover tooltips
-	        var showLabels = isTouchMenu;
+	    if (!osm.authenticated()) {
+	      selection.selectAll('.userLink, .logoutLink').classed('hide', true);
+	      return;
+	    }
 
-	        var buttonHeight = showLabels ? 32 : 34;
-	        if (showLabels) {
-	            // Get a general idea of the width based on the length of the label
-	            _menuWidth = 52 + Math.min(120, 6 * Math.max.apply(Math, ops.map(function(op) {
-	                return op.title.length;
-	            })));
-	        } else {
-	            _menuWidth = 44;
-	        }
+	    osm.userDetails(function (err, details) {
+	      var userLink = selection.select('.userLink'),
+	          logoutLink = selection.select('.logoutLink');
+	      userLink.html('');
+	      logoutLink.html('');
+	      if (err || !details) return;
+	      selection.selectAll('.userLink, .logoutLink').classed('hide', false); // Link
 
-	        _menuHeight = _verticalPadding * 2 + ops.length * buttonHeight;
+	      var userLinkA = userLink.append('a').attr('href', osm.userURL(details.display_name)).attr('target', '_blank'); // Add thumbnail or dont
 
-	        _menu = selection
-	            .append('div')
-	            .attr('class', 'edit-menu')
-	            .classed('touch-menu', isTouchMenu)
-	            .style('padding', _verticalPadding + 'px 0');
-
-	        var buttons = _menu.selectAll('.edit-menu-item')
-	            .data(ops);
-
-	        // enter
-	        var buttonsEnter = buttons.enter()
-	            .append('button')
-	            .attr('class', function (d) { return 'edit-menu-item edit-menu-item-' + d.id; })
-	            .style('height', buttonHeight + 'px')
-	            .on('click', click)
-	            // don't listen for `mouseup` because we only care about non-mouse pointer types
-	            .on('pointerup', pointerup)
-	            .on('pointerdown mousedown', function pointerdown() {
-	                // don't let button presses also act as map input - #1869
-	                event.stopPropagation();
-	            });
+	      if (details.image_url) {
+	        userLinkA.append('img').attr('class', 'icon pre-text user-icon').attr('src', details.image_url);
+	      } else {
+	        userLinkA.call(svgIcon('#iD-icon-avatar', 'pre-text light'));
+	      } // Add user name
 
-	        buttonsEnter.each(function(d) {
-	            var tooltip = uiTooltip()
-	                .heading(d.title)
-	                .title(d.tooltip())
-	                .keys([d.keys[0]]);
 
-	            _tooltips.push(tooltip);
+	      userLinkA.append('span').attr('class', 'label').html(details.display_name);
+	      logoutLink.append('a').attr('class', 'logout').attr('href', '#').html(_t.html('logout')).on('click.logout', function (d3_event) {
+	        d3_event.preventDefault();
+	        osm.logout();
+	      });
+	    });
+	  }
 
-	            select(this)
-	                .call(tooltip)
-	                .append('div')
-	                .attr('class', 'icon-wrap')
-	                .call(svgIcon('#iD-operation-' + d.id, 'operation'));
-	        });
+	  return function (selection) {
+	    selection.append('li').attr('class', 'userLink').classed('hide', true);
+	    selection.append('li').attr('class', 'logoutLink').classed('hide', true);
 
-	        if (showLabels) {
-	            buttonsEnter.append('span')
-	                .attr('class', 'label')
-	                .text(function(d) {
-	                    return d.title;
-	                });
-	        }
+	    if (osm) {
+	      osm.on('change.account', function () {
+	        update(selection);
+	      });
+	      update(selection);
+	    }
+	  };
+	}
 
-	        // update
-	        buttons = buttonsEnter
-	            .merge(buttons)
-	            .classed('disabled', function(d) { return d.disabled(); });
+	function uiAttribution(context) {
+	  var _selection = select(null);
 
-	        updatePosition();
+	  function render(selection, data, klass) {
+	    var div = selection.selectAll(".".concat(klass)).data([0]);
+	    div = div.enter().append('div').attr('class', klass).merge(div);
+	    var attributions = div.selectAll('.attribution').data(data, function (d) {
+	      return d.id;
+	    });
+	    attributions.exit().remove();
+	    attributions = attributions.enter().append('span').attr('class', 'attribution').each(function (d, i, nodes) {
+	      var attribution = select(nodes[i]);
 
-	        var initialScale = context.projection.scale();
-	        context.map()
-	            .on('move.edit-menu', function() {
-	                if (initialScale !== context.projection.scale()) {
-	                    editMenu.close();
-	                }
-	            })
-	            .on('drawn.edit-menu', function(info) {
-	                if (info.full) { updatePosition(); }
-	            });
+	      if (d.terms_html) {
+	        attribution.html(d.terms_html);
+	        return;
+	      }
 
-	        var lastPointerUpType;
-	        // `pointerup` is always called before `click`
-	        function pointerup() {
-	            lastPointerUpType = event.pointerType;
-	        }
-
-	        function click(operation) {
-	            event.stopPropagation();
-	            if (operation.disabled()) {
-	                if (lastPointerUpType === 'touch' ||
-	                    lastPointerUpType === 'pen') {
-	                    // there are no tooltips for touch interactions so flash feedback instead
-	                    context.ui().flash
-	                        .duration(4000)
-	                        .iconName('#iD-operation-' + operation.id)
-	                        .iconClass('operation disabled')
-	                        .text(operation.tooltip)();
-	                }
-	            } else {
-	                if (lastPointerUpType === 'touch' ||
-	                    lastPointerUpType === 'pen') {
-	                    context.ui().flash
-	                        .duration(2000)
-	                        .iconName('#iD-operation-' + operation.id)
-	                        .iconClass('operation')
-	                        .text(operation.annotation() || operation.title)();
-	                }
+	      if (d.terms_url) {
+	        attribution = attribution.append('a').attr('href', d.terms_url).attr('target', '_blank');
+	      }
 
-	                operation();
-	                editMenu.close();
-	            }
-	            lastPointerUpType = null;
-	        }
+	      var sourceID = d.id.replace(/\./g, '<TX_DOT>');
+	      var terms_text = _t("imagery.".concat(sourceID, ".attribution.text"), {
+	        "default": d.terms_text || d.id || d.name()
+	      });
 
-	        dispatch$1.call('toggled', this, true);
-	    };
+	      if (d.icon && !d.overlay) {
+	        attribution.append('img').attr('class', 'source-image').attr('src', d.icon);
+	      }
 
-	    function updatePosition() {
+	      attribution.append('span').attr('class', 'attribution-text').html(terms_text);
+	    }).merge(attributions);
+	    var copyright = attributions.selectAll('.copyright-notice').data(function (d) {
+	      var notice = d.copyrightNotices(context.map().zoom(), context.map().extent());
+	      return notice ? [notice] : [];
+	    });
+	    copyright.exit().remove();
+	    copyright = copyright.enter().append('span').attr('class', 'copyright-notice').merge(copyright);
+	    copyright.html(String);
+	  }
 
-	        if (!_menu || _menu.empty()) { return; }
+	  function update() {
+	    var baselayer = context.background().baseLayerSource();
 
-	        var anchorLoc = context.projection(_anchorLocLonLat);
+	    _selection.call(render, baselayer ? [baselayer] : [], 'base-layer-attribution');
 
-	        var viewport = context.surfaceRect();
+	    var z = context.map().zoom();
+	    var overlays = context.background().overlayLayerSources() || [];
 
-	        if (anchorLoc[0] < 0 ||
-	            anchorLoc[0] > viewport.width ||
-	            anchorLoc[1] < 0 ||
-	            anchorLoc[1] > viewport.height) {
-	            // close the menu if it's gone offscreen
+	    _selection.call(render, overlays.filter(function (s) {
+	      return s.validZoom(z);
+	    }), 'overlay-layer-attribution');
+	  }
 
-	            editMenu.close();
-	            return;
-	        }
+	  return function (selection) {
+	    _selection = selection;
+	    context.background().on('change.attribution', update);
+	    context.map().on('move.attribution', throttle(update, 400, {
+	      leading: false
+	    }));
+	    update();
+	  };
+	}
 
-	        var menuLeft = displayOnLeft(viewport);
+	function uiContributors(context) {
+	  var osm = context.connection(),
+	      debouncedUpdate = debounce(function () {
+	    update();
+	  }, 1000),
+	      limit = 4,
+	      hidden = false,
+	      wrap = select(null);
 
-	        var offset = [0, 0];
+	  function update() {
+	    if (!osm) return;
+	    var users = {},
+	        entities = context.history().intersects(context.map().extent());
+	    entities.forEach(function (entity) {
+	      if (entity && entity.user) users[entity.user] = true;
+	    });
+	    var u = Object.keys(users),
+	        subset = u.slice(0, u.length > limit ? limit - 1 : limit);
+	    wrap.html('').call(svgIcon('#iD-icon-nearby', 'pre-text light'));
+	    var userList = select(document.createElement('span'));
+	    userList.selectAll().data(subset).enter().append('a').attr('class', 'user-link').attr('href', function (d) {
+	      return osm.userURL(d);
+	    }).attr('target', '_blank').html(String);
+
+	    if (u.length > limit) {
+	      var count = select(document.createElement('span'));
+	      var othersNum = u.length - limit + 1;
+	      count.append('a').attr('target', '_blank').attr('href', function () {
+	        return osm.changesetsURL(context.map().center(), context.map().zoom());
+	      }).html(othersNum);
+	      wrap.append('span').html(_t.html('contributors.truncated_list', {
+	        n: othersNum,
+	        users: userList.html(),
+	        count: count.html()
+	      }));
+	    } else {
+	      wrap.append('span').html(_t.html('contributors.list', {
+	        users: userList.html()
+	      }));
+	    }
 
-	        offset[0] = menuLeft ? -1 * (_menuSideMargin + _menuWidth) : _menuSideMargin;
+	    if (!u.length) {
+	      hidden = true;
+	      wrap.transition().style('opacity', 0);
+	    } else if (hidden) {
+	      wrap.transition().style('opacity', 1);
+	    }
+	  }
 
-	        if (_menuTop) {
-	            if (anchorLoc[1] - _menuHeight < _vpTopMargin) {
-	                // menu is near top viewport edge, shift downward
-	                offset[1] = -anchorLoc[1] + _vpTopMargin;
-	            } else {
-	                offset[1] = -_menuHeight;
-	            }
-	        } else {
-	            if (anchorLoc[1] + _menuHeight > (viewport.height - _vpBottomMargin)) {
-	                // menu is near bottom viewport edge, shift upwards
-	                offset[1] = -anchorLoc[1] - _menuHeight + viewport.height - _vpBottomMargin;
-	            } else {
-	                offset[1] = 0;
-	            }
-	        }
+	  return function (selection) {
+	    if (!osm) return;
+	    wrap = selection;
+	    update();
+	    osm.on('loaded.contributors', debouncedUpdate);
+	    context.map().on('move.contributors', debouncedUpdate);
+	  };
+	}
 
-	        var origin = geoVecAdd(anchorLoc, offset);
+	var _popoverID = 0;
+	function uiPopover(klass) {
+	  var _id = _popoverID++;
 
-	        _menu
-	            .style('left', origin[0] + 'px')
-	            .style('top', origin[1] + 'px');
+	  var _anchorSelection = select(null);
 
-	        var tooltipSide = tooltipPosition(viewport, menuLeft);
-	        _tooltips.forEach(function(tooltip) {
-	            tooltip.placement(tooltipSide);
-	        });
+	  var popover = function popover(selection) {
+	    _anchorSelection = selection;
+	    selection.each(setup);
+	  };
 
-	        function displayOnLeft(viewport) {
-	            if (_mainLocalizer.textDirection() === 'ltr') {
-	                if ((anchorLoc[0] + _menuSideMargin + _menuWidth) > (viewport.width - _vpSideMargin)) {
-	                    // right menu would be too close to the right viewport edge, go left
-	                    return true;
-	                }
-	                // prefer right menu
-	                return false;
+	  var _animation = utilFunctor(false);
 
-	            } else { // rtl
-	                if ((anchorLoc[0] - _menuSideMargin - _menuWidth) < _vpSideMargin) {
-	                    // left menu would be too close to the left viewport edge, go right
-	                    return false;
-	                }
-	                // prefer left menu
-	                return true;
-	            }
-	        }
+	  var _placement = utilFunctor('top'); // top, bottom, left, right
 
-	        function tooltipPosition(viewport, menuLeft) {
-	            if (_mainLocalizer.textDirection() === 'ltr') {
-	                if (menuLeft) {
-	                    // if there's not room for a right-side menu then there definitely
-	                    // isn't room for right-side tooltips
-	                    return 'left';
-	                }
-	                if ((anchorLoc[0] + _menuSideMargin + _menuWidth + _tooltipWidth) > (viewport.width - _vpSideMargin)) {
-	                    // right tooltips would be too close to the right viewport edge, go left
-	                    return 'left';
-	                }
-	                // prefer right tooltips
-	                return 'right';
 
-	            } else { // rtl
-	                if (!menuLeft) {
-	                    return 'right';
-	                }
-	                if ((anchorLoc[0] - _menuSideMargin - _menuWidth - _tooltipWidth) < _vpSideMargin) {
-	                    // left tooltips would be too close to the left viewport edge, go right
-	                    return 'right';
-	                }
-	                // prefer left tooltips
-	                return 'left';
-	            }
-	        }
-	    }
+	  var _alignment = utilFunctor('center'); // leading, center, trailing
 
-	    editMenu.close = function () {
 
-	        context.map()
-	            .on('move.edit-menu', null)
-	            .on('drawn.edit-menu', null);
+	  var _scrollContainer = utilFunctor(select(null));
 
-	        _menu.remove();
-	        _tooltips = [];
+	  var _content;
 
-	        dispatch$1.call('toggled', this, false);
-	    };
+	  var _displayType = utilFunctor('');
 
-	    editMenu.anchorLoc = function(val) {
-	        if (!arguments.length) { return _anchorLoc; }
-	        _anchorLoc = val;
-	        _anchorLocLonLat = context.projection.invert(_anchorLoc);
-	        return editMenu;
-	    };
+	  var _hasArrow = utilFunctor(true); // use pointer events on supported platforms; fallback to mouse events
 
-	    editMenu.triggerType = function(val) {
-	        if (!arguments.length) { return _triggerType; }
-	        _triggerType = val;
-	        return editMenu;
-	    };
 
-	    editMenu.operations = function(val) {
-	        if (!arguments.length) { return _operations; }
-	        _operations = val;
-	        return editMenu;
-	    };
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	    return utilRebind(editMenu, dispatch$1, 'on');
-	}
+	  popover.displayType = function (val) {
+	    if (arguments.length) {
+	      _displayType = utilFunctor(val);
+	      return popover;
+	    } else {
+	      return _displayType;
+	    }
+	  };
 
-	function uiFeatureInfo(context) {
-	    function update(selection) {
-	        var features = context.features();
-	        var stats = features.stats();
-	        var count = 0;
-	        var hiddenList = features.hidden().map(function(k) {
-	            if (stats[k]) {
-	                count += stats[k];
-	                return String(stats[k]) + ' ' + _t('feature.' + k + '.description');
-	            }
-	        }).filter(Boolean);
+	  popover.hasArrow = function (val) {
+	    if (arguments.length) {
+	      _hasArrow = utilFunctor(val);
+	      return popover;
+	    } else {
+	      return _hasArrow;
+	    }
+	  };
 
-	        selection.html('');
+	  popover.placement = function (val) {
+	    if (arguments.length) {
+	      _placement = utilFunctor(val);
+	      return popover;
+	    } else {
+	      return _placement;
+	    }
+	  };
 
-	        if (hiddenList.length) {
-	            var tooltipBehavior = uiTooltip()
-	                .placement('top')
-	                .title(function() {
-	                    return hiddenList.join('<br/>');
-	                });
+	  popover.alignment = function (val) {
+	    if (arguments.length) {
+	      _alignment = utilFunctor(val);
+	      return popover;
+	    } else {
+	      return _alignment;
+	    }
+	  };
 
-	            selection.append('a')
-	                .attr('class', 'chip')
-	                .attr('href', '#')
-	                .attr('tabindex', -1)
-	                .html(_t('feature_info.hidden_warning', { count: count }))
-	                .call(tooltipBehavior)
-	                .on('click', function() {
-	                    tooltipBehavior.hide();
-	                    event.preventDefault();
-	                    // open the Map Data pane
-	                    context.ui().togglePanes(context.container().select('.map-panes .map-data-pane'));
-	                });
-	        }
+	  popover.scrollContainer = function (val) {
+	    if (arguments.length) {
+	      _scrollContainer = utilFunctor(val);
+	      return popover;
+	    } else {
+	      return _scrollContainer;
+	    }
+	  };
 
-	        selection
-	            .classed('hide', !hiddenList.length);
+	  popover.content = function (val) {
+	    if (arguments.length) {
+	      _content = val;
+	      return popover;
+	    } else {
+	      return _content;
 	    }
+	  };
 
+	  popover.isShown = function () {
+	    var popoverSelection = _anchorSelection.select('.popover-' + _id);
 
-	    return function(selection) {
-	        update(selection);
+	    return !popoverSelection.empty() && popoverSelection.classed('in');
+	  };
 
-	        context.features().on('change.feature_info', function() {
-	            update(selection);
-	        });
-	    };
-	}
+	  popover.show = function () {
+	    _anchorSelection.each(show);
+	  };
 
-	function uiFlash(context) {
-	    var _flashTimer;
+	  popover.updateContent = function () {
+	    _anchorSelection.each(updateContent);
+	  };
 
-	    var _duration = 2000;
-	    var _iconName = '#iD-icon-no';
-	    var _iconClass = 'disabled';
-	    var _text = '';
-	    var _textClass;
+	  popover.hide = function () {
+	    _anchorSelection.each(hide);
+	  };
 
-	    function flash() {
-	        if (_flashTimer) {
-	            _flashTimer.stop();
-	        }
+	  popover.toggle = function () {
+	    _anchorSelection.each(toggle);
+	  };
 
-	        context.container().select('.main-footer-wrap')
-	            .classed('footer-hide', true)
-	            .classed('footer-show', false);
-	        context.container().select('.flash-wrap')
-	            .classed('footer-hide', false)
-	            .classed('footer-show', true);
+	  popover.destroy = function (selection, selector) {
+	    // by default, just destroy the current popover
+	    selector = selector || '.popover-' + _id;
+	    selection.on(_pointerPrefix + 'enter.popover', null).on(_pointerPrefix + 'leave.popover', null).on(_pointerPrefix + 'up.popover', null).on(_pointerPrefix + 'down.popover', null).on('click.popover', null).attr('title', function () {
+	      return this.getAttribute('data-original-title') || this.getAttribute('title');
+	    }).attr('data-original-title', null).selectAll(selector).remove();
+	  };
 
-	        var content = context.container().select('.flash-wrap').selectAll('.flash-content')
-	            .data([0]);
+	  popover.destroyAny = function (selection) {
+	    selection.call(popover.destroy, '.popover');
+	  };
 
-	        // Enter
-	        var contentEnter = content.enter()
-	            .append('div')
-	            .attr('class', 'flash-content');
+	  function setup() {
+	    var anchor = select(this);
 
-	        var iconEnter = contentEnter
-	            .append('svg')
-	            .attr('class', 'flash-icon icon')
-	            .append('g')
-	            .attr('transform', 'translate(10,10)');
+	    var animate = _animation.apply(this, arguments);
 
-	        iconEnter
-	            .append('circle')
-	            .attr('r', 9);
+	    var popoverSelection = anchor.selectAll('.popover-' + _id).data([0]);
+	    var enter = popoverSelection.enter().append('div').attr('class', 'popover popover-' + _id + ' ' + (klass ? klass : '')).classed('arrowed', _hasArrow.apply(this, arguments));
+	    enter.append('div').attr('class', 'popover-arrow');
+	    enter.append('div').attr('class', 'popover-inner');
+	    popoverSelection = enter.merge(popoverSelection);
 
-	        iconEnter
-	            .append('use')
-	            .attr('transform', 'translate(-7,-7)')
-	            .attr('width', '14')
-	            .attr('height', '14');
+	    if (animate) {
+	      popoverSelection.classed('fade', true);
+	    }
 
-	        contentEnter
-	            .append('div')
-	            .attr('class', 'flash-text');
+	    var display = _displayType.apply(this, arguments);
 
+	    if (display === 'hover') {
+	      var _lastNonMouseEnterTime;
 
-	        // Update
-	        content = content
-	            .merge(contentEnter);
+	      anchor.on(_pointerPrefix + 'enter.popover', function (d3_event) {
+	        if (d3_event.pointerType) {
+	          if (d3_event.pointerType !== 'mouse') {
+	            _lastNonMouseEnterTime = d3_event.timeStamp; // only allow hover behavior for mouse input
 
-	        content
-	            .selectAll('.flash-icon')
-	            .attr('class', 'icon flash-icon ' + (_iconClass || ''));
+	            return;
+	          } else if (_lastNonMouseEnterTime && d3_event.timeStamp - _lastNonMouseEnterTime < 1500) {
+	            // HACK: iOS 13.4 sends an erroneous `mouse` type pointerenter
+	            // event for non-mouse interactions right after sending
+	            // the correct type pointerenter event. Workaround by discarding
+	            // any mouse event that occurs immediately after a non-mouse event.
+	            return;
+	          }
+	        } // don't show if buttons are pressed, e.g. during click and drag of map
+
+
+	        if (d3_event.buttons !== 0) return;
+	        show.apply(this, arguments);
+	      }).on(_pointerPrefix + 'leave.popover', function () {
+	        hide.apply(this, arguments);
+	      }) // show on focus too for better keyboard navigation support
+	      .on('focus.popover', function () {
+	        show.apply(this, arguments);
+	      }).on('blur.popover', function () {
+	        hide.apply(this, arguments);
+	      });
+	    } else if (display === 'clickFocus') {
+	      anchor.on(_pointerPrefix + 'down.popover', function (d3_event) {
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation();
+	      }).on(_pointerPrefix + 'up.popover', function (d3_event) {
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation();
+	      }).on('click.popover', toggle);
+	      popoverSelection // This attribute lets the popover take focus
+	      .attr('tabindex', 0).on('blur.popover', function () {
+	        anchor.each(function () {
+	          hide.apply(this, arguments);
+	        });
+	      });
+	    }
+	  }
 
-	        content
-	            .selectAll('.flash-icon use')
-	            .attr('xlink:href', _iconName);
+	  function show() {
+	    var anchor = select(this);
+	    var popoverSelection = anchor.selectAll('.popover-' + _id);
 
-	        content
-	            .selectAll('.flash-text')
-	            .attr('class', 'flash-text ' + (_textClass || ''))
-	            .text(_text);
+	    if (popoverSelection.empty()) {
+	      // popover was removed somehow, put it back
+	      anchor.call(popover.destroy);
+	      anchor.each(setup);
+	      popoverSelection = anchor.selectAll('.popover-' + _id);
+	    }
 
+	    popoverSelection.classed('in', true);
 
-	        _flashTimer = d3_timeout(function() {
-	            _flashTimer = null;
-	            context.container().select('.main-footer-wrap')
-	                .classed('footer-hide', false)
-	                .classed('footer-show', true);
-	            context.container().select('.flash-wrap')
-	                .classed('footer-hide', true)
-	                .classed('footer-show', false);
-	        }, _duration);
+	    var displayType = _displayType.apply(this, arguments);
 
-	        return content;
+	    if (displayType === 'clickFocus') {
+	      anchor.classed('active', true);
+	      popoverSelection.node().focus();
 	    }
 
+	    anchor.each(updateContent);
+	  }
 
-	    flash.duration = function(_) {
-	        if (!arguments.length) { return _duration; }
-	        _duration = _;
-	        return flash;
-	    };
-
-	    flash.text = function(_) {
-	        if (!arguments.length) { return _text; }
-	        _text = _;
-	        return flash;
-	    };
+	  function updateContent() {
+	    var anchor = select(this);
 
-	    flash.textClass = function(_) {
-	        if (!arguments.length) { return _textClass; }
-	        _textClass = _;
-	        return flash;
-	    };
+	    if (_content) {
+	      anchor.selectAll('.popover-' + _id + ' > .popover-inner').call(_content.apply(this, arguments));
+	    }
 
-	    flash.iconName = function(_) {
-	        if (!arguments.length) { return _iconName; }
-	        _iconName = _;
-	        return flash;
-	    };
+	    updatePosition.apply(this, arguments); // hack: update multiple times to fix instances where the absolute offset is
+	    // set before the dynamic popover size is calculated by the browser
 
-	    flash.iconClass = function(_) {
-	        if (!arguments.length) { return _iconClass; }
-	        _iconClass = _;
-	        return flash;
-	    };
+	    updatePosition.apply(this, arguments);
+	    updatePosition.apply(this, arguments);
+	  }
 
-	    return flash;
-	}
+	  function updatePosition() {
+	    var anchor = select(this);
+	    var popoverSelection = anchor.selectAll('.popover-' + _id);
 
-	function uiFullScreen(context) {
-	    var element = context.container().node();
-	    // var button = d3_select(null);
+	    var scrollContainer = _scrollContainer && _scrollContainer.apply(this, arguments);
 
+	    var scrollNode = scrollContainer && !scrollContainer.empty() && scrollContainer.node();
+	    var scrollLeft = scrollNode ? scrollNode.scrollLeft : 0;
+	    var scrollTop = scrollNode ? scrollNode.scrollTop : 0;
 
-	    function getFullScreenFn() {
-	        if (element.requestFullscreen) {
-	            return element.requestFullscreen;
-	        } else if (element.msRequestFullscreen) {
-	            return element.msRequestFullscreen;
-	        } else if (element.mozRequestFullScreen) {
-	            return element.mozRequestFullScreen;
-	        } else if (element.webkitRequestFullscreen) {
-	            return element.webkitRequestFullscreen;
-	        }
-	    }
+	    var placement = _placement.apply(this, arguments);
 
+	    popoverSelection.classed('left', false).classed('right', false).classed('top', false).classed('bottom', false).classed(placement, true);
 
-	    function getExitFullScreenFn() {
-	        if (document.exitFullscreen) {
-	            return document.exitFullscreen;
-	        } else if (document.msExitFullscreen) {
-	            return document.msExitFullscreen;
-	        } else if (document.mozCancelFullScreen) {
-	            return document.mozCancelFullScreen;
-	        } else if (document.webkitExitFullscreen) {
-	            return document.webkitExitFullscreen;
-	        }
-	    }
+	    var alignment = _alignment.apply(this, arguments);
 
+	    var alignFactor = 0.5;
 
-	    function isFullScreen() {
-	        return document.fullscreenElement ||
-	            document.mozFullScreenElement ||
-	            document.webkitFullscreenElement ||
-	            document.msFullscreenElement;
+	    if (alignment === 'leading') {
+	      alignFactor = 0;
+	    } else if (alignment === 'trailing') {
+	      alignFactor = 1;
 	    }
 
+	    var anchorFrame = getFrame(anchor.node());
+	    var popoverFrame = getFrame(popoverSelection.node());
+	    var position;
 
-	    function isSupported() {
-	        return !!getFullScreenFn();
-	    }
-
+	    switch (placement) {
+	      case 'top':
+	        position = {
+	          x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
+	          y: anchorFrame.y - popoverFrame.h
+	        };
+	        break;
 
-	    function fullScreen() {
-	        event.preventDefault();
-	        if (!isFullScreen()) {
-	            // button.classed('active', true);
-	            getFullScreenFn().apply(element);
-	        } else {
-	            // button.classed('active', false);
-	            getExitFullScreenFn().apply(document);
-	        }
-	    }
+	      case 'bottom':
+	        position = {
+	          x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
+	          y: anchorFrame.y + anchorFrame.h
+	        };
+	        break;
 
+	      case 'left':
+	        position = {
+	          x: anchorFrame.x - popoverFrame.w,
+	          y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
+	        };
+	        break;
 
-	    return function() { // selection) {
-	        if (!isSupported()) { return; }
+	      case 'right':
+	        position = {
+	          x: anchorFrame.x + anchorFrame.w,
+	          y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
+	        };
+	        break;
+	    }
 
-	        // button = selection.append('button')
-	        //     .attr('title', t('full_screen'))
-	        //     .attr('tabindex', -1)
-	        //     .on('click', fullScreen)
-	        //     .call(tooltip);
+	    if (position) {
+	      if (scrollNode && (placement === 'top' || placement === 'bottom')) {
+	        var initialPosX = position.x;
 
-	        // button.append('span')
-	        //     .attr('class', 'icon full-screen');
+	        if (position.x + popoverFrame.w > scrollNode.offsetWidth - 10) {
+	          position.x = scrollNode.offsetWidth - 10 - popoverFrame.w;
+	        } else if (position.x < 10) {
+	          position.x = 10;
+	        }
 
-	        var detected = utilDetect();
-	        var keys = (detected.os === 'mac' ? [uiCmd('⌃⌘F'), 'f11'] : ['f11']);
-	        context.keybinding().on(keys, fullScreen);
-	    };
-	}
+	        var arrow = anchor.selectAll('.popover-' + _id + ' > .popover-arrow'); // keep the arrow centered on the button, or as close as possible
 
-	function uiGeolocate(context) {
-	    var _geolocationOptions = {
-	        // prioritize speed and power usage over precision
-	        enableHighAccuracy: false,
-	        // don't hang indefinitely getting the location
-	        timeout: 6000 // 6sec
-	    };
-	    var _locating = uiLoading(context).message(_t('geolocate.locating')).blocking(true);
-	    var _layer = context.layers().layer('geolocate');
-	    var _position;
-	    var _extent;
-	    var _timeoutID;
-	    var _button = select(null);
+	        var arrowPosX = Math.min(Math.max(popoverFrame.w / 2 - (position.x - initialPosX), 10), popoverFrame.w - 10);
+	        arrow.style('left', ~~arrowPosX + 'px');
+	      }
 
-	    function click() {
-	        if (context.inIntro()) { return; }
-	        if (!_layer.enabled() && !_locating.isShown()) {
+	      popoverSelection.style('left', ~~position.x + 'px').style('top', ~~position.y + 'px');
+	    } else {
+	      popoverSelection.style('left', null).style('top', null);
+	    }
 
-	            // This timeout ensures that we still call finish() even if
-	            // the user declines to share their location in Firefox
-	            _timeoutID = setTimeout(error, 10000 /* 10sec */ );
+	    function getFrame(node) {
+	      var positionStyle = select(node).style('position');
 
-	            context.container().call(_locating);
-	            // get the latest position even if we already have one
-	            navigator.geolocation.getCurrentPosition(success, error, _geolocationOptions);
-	        } else {
-	            _locating.close();
-	            _layer.enabled(null, false);
-	            updateButtonState();
-	        }
+	      if (positionStyle === 'absolute' || positionStyle === 'static') {
+	        return {
+	          x: node.offsetLeft - scrollLeft,
+	          y: node.offsetTop - scrollTop,
+	          w: node.offsetWidth,
+	          h: node.offsetHeight
+	        };
+	      } else {
+	        return {
+	          x: 0,
+	          y: 0,
+	          w: node.offsetWidth,
+	          h: node.offsetHeight
+	        };
+	      }
 	    }
+	  }
 
-	    function zoomTo() {
-	        context.enter(modeBrowse(context));
+	  function hide() {
+	    var anchor = select(this);
 
-	        var map = context.map();
-	        _layer.enabled(_position, true);
-	        updateButtonState();
-	        map.centerZoomEase(_extent.center(), Math.min(20, map.extentZoom(_extent)));
+	    if (_displayType.apply(this, arguments) === 'clickFocus') {
+	      anchor.classed('active', false);
 	    }
 
-	    function success(geolocation) {
-	        _position = geolocation;
-	        var coords = _position.coords;
-	        _extent = geoExtent([coords.longitude, coords.latitude]).padByMeters(coords.accuracy);
-	        zoomTo();
-	        finish();
+	    anchor.selectAll('.popover-' + _id).classed('in', false);
+	  }
+
+	  function toggle() {
+	    if (select(this).select('.popover-' + _id).classed('in')) {
+	      hide.apply(this, arguments);
+	    } else {
+	      show.apply(this, arguments);
 	    }
+	  }
 
-	    function error() {
-	        if (_position) {
-	            // use the position from a previous call if we have one
-	            zoomTo();
-	        } else {
-	            context.ui().flash
-	                .text(_t('geolocate.location_unavailable'))
-	                .iconName('#iD-icon-geolocate')();
-	        }
+	  return popover;
+	}
 
-	        finish();
-	    }
+	function uiTooltip(klass) {
+	  var tooltip = uiPopover((klass || '') + ' tooltip').displayType('hover');
 
-	    function finish() {
-	        _locating.close();  // unblock ui
-	        if (_timeoutID) { clearTimeout(_timeoutID); }
-	        _timeoutID = undefined;
-	    }
+	  var _title = function _title() {
+	    var title = this.getAttribute('data-original-title');
 
-	    function updateButtonState() {
-	        _button.classed('active', _layer.enabled());
+	    if (title) {
+	      return title;
+	    } else {
+	      title = this.getAttribute('title');
+	      this.removeAttribute('title');
+	      this.setAttribute('data-original-title', title);
 	    }
 
-	    return function(selection) {
-	        if (!navigator.geolocation || !navigator.geolocation.getCurrentPosition) { return; }
+	    return title;
+	  };
 
-	        _button = selection
-	            .append('button')
-	            .on('click', click)
-	            .call(svgIcon('#iD-icon-geolocate', 'light'))
-	            .call(uiTooltip()
-	                .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-	                .title(_t('geolocate.title'))
-	                .keys([_t('geolocate.key')])
-	            );
+	  var _heading = utilFunctor(null);
 
-	        context.keybinding().on(_t('geolocate.key'), click);
-	    };
-	}
+	  var _keys = utilFunctor(null);
 
-	function uiPanelBackground(context) {
-	    var background = context.background();
-	    var currSourceName = null;
-	    var metadata = {};
-	    var metadataKeys = [
-	        'zoom', 'vintage', 'source', 'description', 'resolution', 'accuracy'
-	    ];
+	  tooltip.title = function (val) {
+	    if (!arguments.length) return _title;
+	    _title = utilFunctor(val);
+	    return tooltip;
+	  };
 
-	    var debouncedRedraw = debounce(redraw, 250);
+	  tooltip.heading = function (val) {
+	    if (!arguments.length) return _heading;
+	    _heading = utilFunctor(val);
+	    return tooltip;
+	  };
 
-	    function redraw(selection) {
-	        var source = background.baseLayerSource();
-	        if (!source) { return; }
+	  tooltip.keys = function (val) {
+	    if (!arguments.length) return _keys;
+	    _keys = utilFunctor(val);
+	    return tooltip;
+	  };
 
-	        var isDG = (source.id.match(/^DigitalGlobe/i) !== null);
+	  tooltip.content(function () {
+	    var heading = _heading.apply(this, arguments);
 
-	        if (currSourceName !== source.name()) {
-	            currSourceName = source.name();
-	            metadata = {};
-	        }
+	    var text = _title.apply(this, arguments);
 
-	        selection.html('');
+	    var keys = _keys.apply(this, arguments);
 
-	        var list = selection
-	            .append('ul')
-	            .attr('class', 'background-info');
-
-	        list
-	            .append('li')
-	            .text(currSourceName);
-
-	        metadataKeys.forEach(function(k) {
-	            // DigitalGlobe vintage is available in raster layers for now.
-	            if (isDG && k === 'vintage') { return; }
-
-	            list
-	                .append('li')
-	                .attr('class', 'background-info-list-' + k)
-	                .classed('hide', !metadata[k])
-	                .text(_t('info_panels.background.' + k) + ':')
-	                .append('span')
-	                .attr('class', 'background-info-span-' + k)
-	                .text(metadata[k]);
-	        });
+	    return function (selection) {
+	      var headingSelect = selection.selectAll('.tooltip-heading').data(heading ? [heading] : []);
+	      headingSelect.exit().remove();
+	      headingSelect.enter().append('div').attr('class', 'tooltip-heading').merge(headingSelect).html(heading);
+	      var textSelect = selection.selectAll('.tooltip-text').data(text ? [text] : []);
+	      textSelect.exit().remove();
+	      textSelect.enter().append('div').attr('class', 'tooltip-text').merge(textSelect).html(text);
+	      var keyhintWrap = selection.selectAll('.keyhint-wrap').data(keys && keys.length ? [0] : []);
+	      keyhintWrap.exit().remove();
+	      var keyhintWrapEnter = keyhintWrap.enter().append('div').attr('class', 'keyhint-wrap');
+	      keyhintWrapEnter.append('span').html(_t.html('tooltip_keyhint'));
+	      keyhintWrap = keyhintWrapEnter.merge(keyhintWrap);
+	      keyhintWrap.selectAll('kbd.shortcut').data(keys && keys.length ? keys : []).enter().append('kbd').attr('class', 'shortcut').html(function (d) {
+	        return d;
+	      });
+	    };
+	  });
+	  return tooltip;
+	}
 
-	        debouncedGetMetadata(selection);
+	function uiEditMenu(context) {
+	  var dispatch = dispatch$8('toggled');
 
-	        var toggleTiles = context.getDebug('tile') ? 'hide_tiles' : 'show_tiles';
+	  var _menu = select(null);
 
-	        selection
-	            .append('a')
-	            .text(_t('info_panels.background.' + toggleTiles))
-	            .attr('href', '#')
-	            .attr('class', 'button button-toggle-tiles')
-	            .on('click', function() {
-	                event.preventDefault();
-	                context.setDebug('tile', !context.getDebug('tile'));
-	                selection.call(redraw);
-	            });
+	  var _operations = []; // the position the menu should be displayed relative to
 
-	        if (isDG) {
-	            var key = source.id + '-vintage';
-	            var sourceVintage = context.background().findSource(key);
-	            var showsVintage = context.background().showsLayer(sourceVintage);
-	            var toggleVintage = showsVintage ? 'hide_vintage' : 'show_vintage';
-	            selection
-	                .append('a')
-	                .text(_t('info_panels.background.' + toggleVintage))
-	                .attr('href', '#')
-	                .attr('class', 'button button-toggle-vintage')
-	                .on('click', function() {
-	                    event.preventDefault();
-	                    context.background().toggleOverlayLayer(sourceVintage);
-	                    selection.call(redraw);
-	                });
-	        }
+	  var _anchorLoc = [0, 0];
+	  var _anchorLocLonLat = [0, 0]; // a string indicating how the menu was opened
 
-	        // disable if necessary
-	        ['DigitalGlobe-Premium', 'DigitalGlobe-Standard'].forEach(function(layerId) {
-	            if (source.id !== layerId) {
-	                var key = layerId + '-vintage';
-	                var sourceVintage = context.background().findSource(key);
-	                if (context.background().showsLayer(sourceVintage)) {
-	                    context.background().toggleOverlayLayer(sourceVintage);
-	                }
-	            }
-	        });
-	    }
+	  var _triggerType = '';
+	  var _vpTopMargin = 85; // viewport top margin
 
+	  var _vpBottomMargin = 45; // viewport bottom margin
 
-	    var debouncedGetMetadata = debounce(getMetadata, 250);
+	  var _vpSideMargin = 35; // viewport side margin
 
-	    function getMetadata(selection) {
-	        var tile = context.container().select('.layer-background img.tile-center');   // tile near viewport center
-	        if (tile.empty()) { return; }
+	  var _menuTop = false;
 
-	        var sourceName = currSourceName;
-	        var d = tile.datum();
-	        var zoom = (d && d.length >= 3 && d[2]) || Math.floor(context.map().zoom());
-	        var center = context.map().center();
+	  var _menuHeight;
 
-	        // update zoom
-	        metadata.zoom = String(zoom);
-	        selection.selectAll('.background-info-list-zoom')
-	            .classed('hide', false)
-	            .selectAll('.background-info-span-zoom')
-	            .text(metadata.zoom);
-
-	        if (!d || !d.length >= 3) { return; }
-
-	        background.baseLayerSource().getMetadata(center, d, function(err, result) {
-	            if (err || currSourceName !== sourceName) { return; }
-
-	            // update vintage
-	            var vintage = result.vintage;
-	            metadata.vintage = (vintage && vintage.range) || _t('info_panels.background.unknown');
-	            selection.selectAll('.background-info-list-vintage')
-	                .classed('hide', false)
-	                .selectAll('.background-info-span-vintage')
-	                .text(metadata.vintage);
-
-	            // update other metadata
-	            metadataKeys.forEach(function(k) {
-	                if (k === 'zoom' || k === 'vintage') { return; }  // done already
-	                var val = result[k];
-	                metadata[k] = val;
-	                selection.selectAll('.background-info-list-' + k)
-	                    .classed('hide', !val)
-	                    .selectAll('.background-info-span-' + k)
-	                    .text(val);
-	            });
-	        });
-	    }
+	  var _menuWidth; // hardcode these values to make menu positioning easier
 
 
-	    var panel = function(selection) {
-	        selection.call(redraw);
+	  var _verticalPadding = 4; // see also `.edit-menu .tooltip` CSS; include margin
 
-	        context.map()
-	            .on('drawn.info-background', function() {
-	                selection.call(debouncedRedraw);
-	            })
-	            .on('move.info-background', function() {
-	                selection.call(debouncedGetMetadata);
-	            });
+	  var _tooltipWidth = 210; // offset the menu slightly from the target location
 
-	    };
+	  var _menuSideMargin = 10;
+	  var _tooltips = [];
 
-	    panel.off = function() {
-	        context.map()
-	            .on('drawn.info-background', null)
-	            .on('move.info-background', null);
-	    };
+	  var editMenu = function editMenu(selection) {
+	    var isTouchMenu = _triggerType.includes('touch') || _triggerType.includes('pen');
 
-	    panel.id = 'background';
-	    panel.title = _t('info_panels.background.title');
-	    panel.key = _t('info_panels.background.key');
+	    var ops = _operations.filter(function (op) {
+	      return !isTouchMenu || !op.mouseOnly;
+	    });
 
+	    if (!ops.length) return;
+	    _tooltips = []; // Position the menu above the anchor for stylus and finger input
+	    // since the mapper's hand likely obscures the screen below the anchor
 
-	    return panel;
-	}
+	    _menuTop = isTouchMenu; // Show labels for touch input since there aren't hover tooltips
 
-	function uiPanelHistory(context) {
-	    var osm;
+	    var showLabels = isTouchMenu;
+	    var buttonHeight = showLabels ? 32 : 34;
 
-	    function displayTimestamp(timestamp) {
-	        if (!timestamp) { return _t('info_panels.history.unknown'); }
-	        var options = {
-	            day: 'numeric', month: 'short', year: 'numeric',
-	            hour: 'numeric', minute: 'numeric', second: 'numeric'
-	        };
-	        var d = new Date(timestamp);
-	        if (isNaN(d.getTime())) { return _t('info_panels.history.unknown'); }
-	        return d.toLocaleString(_mainLocalizer.localeCode(), options);
+	    if (showLabels) {
+	      // Get a general idea of the width based on the length of the label
+	      _menuWidth = 52 + Math.min(120, 6 * Math.max.apply(Math, ops.map(function (op) {
+	        return op.title.length;
+	      })));
+	    } else {
+	      _menuWidth = 44;
 	    }
 
+	    _menuHeight = _verticalPadding * 2 + ops.length * buttonHeight;
+	    _menu = selection.append('div').attr('class', 'edit-menu').classed('touch-menu', isTouchMenu).style('padding', _verticalPadding + 'px 0');
 
-	    function displayUser(selection, userName) {
-	        if (!userName) {
-	            selection
-	                .append('span')
-	                .text(_t('info_panels.history.unknown'));
-	            return;
-	        }
+	    var buttons = _menu.selectAll('.edit-menu-item').data(ops); // enter
 
-	        selection
-	            .append('span')
-	            .attr('class', 'user-name')
-	            .text(userName);
 
-	        var links = selection
-	            .append('div')
-	            .attr('class', 'links');
+	    var buttonsEnter = buttons.enter().append('button').attr('class', function (d) {
+	      return 'edit-menu-item edit-menu-item-' + d.id;
+	    }).style('height', buttonHeight + 'px').on('click', click) // don't listen for `mouseup` because we only care about non-mouse pointer types
+	    .on('pointerup', pointerup).on('pointerdown mousedown', function pointerdown(d3_event) {
+	      // don't let button presses also act as map input - #1869
+	      d3_event.stopPropagation();
+	    }).on('mouseenter.highlight', function (d3_event, d) {
+	      if (!d.relatedEntityIds || select(this).classed('disabled')) return;
+	      utilHighlightEntities(d.relatedEntityIds(), true, context);
+	    }).on('mouseleave.highlight', function (d3_event, d) {
+	      if (!d.relatedEntityIds) return;
+	      utilHighlightEntities(d.relatedEntityIds(), false, context);
+	    });
+	    buttonsEnter.each(function (d) {
+	      var tooltip = uiTooltip().heading(d.title).title(d.tooltip()).keys([d.keys[0]]);
 
-	        if (osm) {
-	            links
-	                .append('a')
-	                .attr('class', 'user-osm-link')
-	                .attr('href', osm.userURL(userName))
-	                .attr('target', '_blank')
-	                .attr('tabindex', -1)
-	                .text('OSM');
-	        }
-
-	        links
-	            .append('a')
-	            .attr('class', 'user-hdyc-link')
-	            .attr('href', 'https://hdyc.neis-one.org/?' + userName)
-	            .attr('target', '_blank')
-	            .attr('tabindex', -1)
-	            .text('HDYC');
-	    }
-
-
-	    function displayChangeset(selection, changeset) {
-	        if (!changeset) {
-	            selection
-	                .append('span')
-	                .text(_t('info_panels.history.unknown'));
-	            return;
-	        }
+	      _tooltips.push(tooltip);
 
-	        selection
-	            .append('span')
-	            .attr('class', 'changeset-id')
-	            .text(changeset);
+	      select(this).call(tooltip).append('div').attr('class', 'icon-wrap').call(svgIcon('#iD-operation-' + d.id, 'operation'));
+	    });
 
-	        var links = selection
-	            .append('div')
-	            .attr('class', 'links');
+	    if (showLabels) {
+	      buttonsEnter.append('span').attr('class', 'label').html(function (d) {
+	        return d.title;
+	      });
+	    } // update
 
-	        if (osm) {
-	            links
-	                .append('a')
-	                .attr('class', 'changeset-osm-link')
-	                .attr('href', osm.changesetURL(changeset))
-	                .attr('target', '_blank')
-	                .attr('tabindex', -1)
-	                .text('OSM');
-	        }
-
-	        links
-	            .append('a')
-	            .attr('class', 'changeset-osmcha-link')
-	            .attr('href', 'https://osmcha.org/changesets/' + changeset)
-	            .attr('target', '_blank')
-	            .attr('tabindex', -1)
-	            .text('OSMCha');
-
-	        links
-	            .append('a')
-	            .attr('class', 'changeset-achavi-link')
-	            .attr('href', 'https://overpass-api.de/achavi/?changeset=' + changeset)
-	            .attr('target', '_blank')
-	            .attr('tabindex', -1)
-	            .text('Achavi');
-	    }
-
-
-	    function redraw(selection) {
-	        var selectedNoteID = context.selectedNoteID();
-	        osm = context.connection();
-
-	        var selected, note, entity;
-	        if (selectedNoteID && osm) {       // selected 1 note
-	            selected = [ _t('note.note') + ' ' + selectedNoteID ];
-	            note = osm.getNote(selectedNoteID);
-	        } else {                           // selected 1..n entities
-	            selected = context.selectedIDs()
-	                .filter(function(e) { return context.hasEntity(e); });
-	            if (selected.length) {
-	                entity = context.entity(selected[0]);
-	            }
-	        }
 
-	        var singular = selected.length === 1 ? selected[0] : null;
+	    buttonsEnter.merge(buttons).classed('disabled', function (d) {
+	      return d.disabled();
+	    });
+	    updatePosition();
+	    var initialScale = context.projection.scale();
+	    context.map().on('move.edit-menu', function () {
+	      if (initialScale !== context.projection.scale()) {
+	        editMenu.close();
+	      }
+	    }).on('drawn.edit-menu', function (info) {
+	      if (info.full) updatePosition();
+	    });
+	    var lastPointerUpType; // `pointerup` is always called before `click`
 
-	        selection.html('');
+	    function pointerup(d3_event) {
+	      lastPointerUpType = d3_event.pointerType;
+	    }
 
-	        selection
-	            .append('h4')
-	            .attr('class', 'history-heading')
-	            .text(singular || _t('info_panels.history.selected', { n: selected.length }));
+	    function click(d3_event, operation) {
+	      d3_event.stopPropagation();
 
-	        if (!singular) { return; }
+	      if (operation.relatedEntityIds) {
+	        utilHighlightEntities(operation.relatedEntityIds(), false, context);
+	      }
 
-	        if (entity) {
-	            selection.call(redrawEntity, entity);
-	        } else if (note) {
-	            selection.call(redrawNote, note);
+	      if (operation.disabled()) {
+	        if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
+	          // there are no tooltips for touch interactions so flash feedback instead
+	          context.ui().flash.duration(4000).iconName('#iD-operation-' + operation.id).iconClass('operation disabled').label(operation.tooltip)();
 	        }
-	    }
-
-
-	    function redrawNote(selection, note) {
-	        if (!note || note.isNew()) {
-	            selection
-	                .append('div')
-	                .text(_t('info_panels.history.note_no_history'));
-	            return;
+	      } else {
+	        if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
+	          context.ui().flash.duration(2000).iconName('#iD-operation-' + operation.id).iconClass('operation').label(operation.annotation() || operation.title)();
 	        }
 
-	        var list = selection
-	            .append('ul');
+	        operation();
+	        editMenu.close();
+	      }
 
-	        list
-	            .append('li')
-	            .text(_t('info_panels.history.note_comments') + ':')
-	            .append('span')
-	            .text(note.comments.length);
+	      lastPointerUpType = null;
+	    }
 
-	        if (note.comments.length) {
-	            list
-	                .append('li')
-	                .text(_t('info_panels.history.note_created_date') + ':')
-	                .append('span')
-	                .text(displayTimestamp(note.comments[0].date));
+	    dispatch.call('toggled', this, true);
+	  };
 
-	            list
-	                .append('li')
-	                .text(_t('info_panels.history.note_created_user') + ':')
-	                .call(displayUser, note.comments[0].user);
-	        }
+	  function updatePosition() {
+	    if (!_menu || _menu.empty()) return;
+	    var anchorLoc = context.projection(_anchorLocLonLat);
+	    var viewport = context.surfaceRect();
 
-	        if (osm) {
-	            selection
-	                .append('a')
-	                .attr('class', 'view-history-on-osm')
-	                .attr('target', '_blank')
-	                .attr('tabindex', -1)
-	                .attr('href', osm.noteURL(note))
-	                .call(svgIcon('#iD-icon-out-link', 'inline'))
-	                .append('span')
-	                .text(_t('info_panels.history.note_link_text'));
-	        }
+	    if (anchorLoc[0] < 0 || anchorLoc[0] > viewport.width || anchorLoc[1] < 0 || anchorLoc[1] > viewport.height) {
+	      // close the menu if it's gone offscreen
+	      editMenu.close();
+	      return;
 	    }
 
+	    var menuLeft = displayOnLeft(viewport);
+	    var offset = [0, 0];
+	    offset[0] = menuLeft ? -1 * (_menuSideMargin + _menuWidth) : _menuSideMargin;
 
-	    function redrawEntity(selection, entity) {
-	        if (!entity || entity.isNew()) {
-	            selection
-	                .append('div')
-	                .text(_t('info_panels.history.no_history'));
-	            return;
-	        }
-
-	        var links = selection
-	            .append('div')
-	            .attr('class', 'links');
+	    if (_menuTop) {
+	      if (anchorLoc[1] - _menuHeight < _vpTopMargin) {
+	        // menu is near top viewport edge, shift downward
+	        offset[1] = -anchorLoc[1] + _vpTopMargin;
+	      } else {
+	        offset[1] = -_menuHeight;
+	      }
+	    } else {
+	      if (anchorLoc[1] + _menuHeight > viewport.height - _vpBottomMargin) {
+	        // menu is near bottom viewport edge, shift upwards
+	        offset[1] = -anchorLoc[1] - _menuHeight + viewport.height - _vpBottomMargin;
+	      } else {
+	        offset[1] = 0;
+	      }
+	    }
 
-	        if (osm) {
-	            links
-	                .append('a')
-	                .attr('class', 'view-history-on-osm')
-	                .attr('href', osm.historyURL(entity))
-	                .attr('target', '_blank')
-	                .attr('tabindex', -1)
-	                .attr('title', _t('info_panels.history.link_text'))
-	                .text('OSM');
-	        }
-	        links
-	            .append('a')
-	            .attr('class', 'pewu-history-viewer-link')
-	            .attr('href', 'https://pewu.github.io/osm-history/#/' + entity.type + '/' + entity.osmId())
-	            .attr('target', '_blank')
-	            .attr('tabindex', -1)
-	            .text('PeWu');
-
-	        var list = selection
-	            .append('ul');
-
-	        list
-	            .append('li')
-	            .text(_t('info_panels.history.version') + ':')
-	            .append('span')
-	            .text(entity.version);
-
-	        list
-	            .append('li')
-	            .text(_t('info_panels.history.last_edit') + ':')
-	            .append('span')
-	            .text(displayTimestamp(entity.timestamp));
-
-	        list
-	            .append('li')
-	            .text(_t('info_panels.history.edited_by') + ':')
-	            .call(displayUser, entity.user);
-
-	        list
-	            .append('li')
-	            .text(_t('info_panels.history.changeset') + ':')
-	            .call(displayChangeset, entity.changeset);
-	    }
-
-
-	    var panel = function(selection) {
-	        selection.call(redraw);
+	    var origin = geoVecAdd(anchorLoc, offset);
 
-	        context.map()
-	            .on('drawn.info-history', function() {
-	                selection.call(redraw);
-	            });
+	    _menu.style('left', origin[0] + 'px').style('top', origin[1] + 'px');
 
-	        context
-	            .on('enter.info-history', function() {
-	                selection.call(redraw);
-	            });
-	    };
+	    var tooltipSide = tooltipPosition(viewport, menuLeft);
 
-	    panel.off = function() {
-	        context.map().on('drawn.info-history', null);
-	        context.on('enter.info-history', null);
-	    };
+	    _tooltips.forEach(function (tooltip) {
+	      tooltip.placement(tooltipSide);
+	    });
 
-	    panel.id = 'history';
-	    panel.title = _t('info_panels.history.title');
-	    panel.key = _t('info_panels.history.key');
+	    function displayOnLeft(viewport) {
+	      if (_mainLocalizer.textDirection() === 'ltr') {
+	        if (anchorLoc[0] + _menuSideMargin + _menuWidth > viewport.width - _vpSideMargin) {
+	          // right menu would be too close to the right viewport edge, go left
+	          return true;
+	        } // prefer right menu
 
 
-	    return panel;
-	}
+	        return false;
+	      } else {
+	        // rtl
+	        if (anchorLoc[0] - _menuSideMargin - _menuWidth < _vpSideMargin) {
+	          // left menu would be too close to the left viewport edge, go right
+	          return false;
+	        } // prefer left menu
 
-	var OSM_PRECISION = 7;
 
-	/**
-	 * Returns a localized representation of the given length measurement.
-	 *
-	 * @param {Number} m area in meters
-	 * @param {Boolean} isImperial true for U.S. customary units; false for metric
-	 */
-	function displayLength(m, isImperial) {
-	    var d = m * (isImperial ? 3.28084 : 1);
-	    var unit;
+	        return true;
+	      }
+	    }
 
-	    if (isImperial) {
-	        if (d >= 5280) {
-	            d /= 5280;
-	            unit = 'miles';
-	        } else {
-	            unit = 'feet';
+	    function tooltipPosition(viewport, menuLeft) {
+	      if (_mainLocalizer.textDirection() === 'ltr') {
+	        if (menuLeft) {
+	          // if there's not room for a right-side menu then there definitely
+	          // isn't room for right-side tooltips
+	          return 'left';
 	        }
-	    } else {
-	        if (d >= 1000) {
-	            d /= 1000;
-	            unit = 'kilometers';
-	        } else {
-	            unit = 'meters';
-	        }
-	    }
 
-	    return _t('units.' + unit, {
-	        quantity: d.toLocaleString(_mainLocalizer.localeCode(), {
-	            maximumSignificantDigits: 4
-	        })
-	    });
-	}
+	        if (anchorLoc[0] + _menuSideMargin + _menuWidth + _tooltipWidth > viewport.width - _vpSideMargin) {
+	          // right tooltips would be too close to the right viewport edge, go left
+	          return 'left';
+	        } // prefer right tooltips
 
-	/**
-	 * Returns a localized representation of the given area measurement.
-	 *
-	 * @param {Number} m2 area in square meters
-	 * @param {Boolean} isImperial true for U.S. customary units; false for metric
-	 */
-	function displayArea(m2, isImperial) {
-	    var locale = _mainLocalizer.localeCode();
-	    var d = m2 * (isImperial ? 10.7639111056 : 1);
-	    var d1, d2, area;
-	    var unit1 = '';
-	    var unit2 = '';
 
-	    if (isImperial) {
-	        if (d >= 6969600) { // > 0.25mi² show mi²
-	            d1 = d / 27878400;
-	            unit1 = 'square_miles';
-	        } else {
-	            d1 = d;
-	            unit1 = 'square_feet';
+	        return 'right';
+	      } else {
+	        // rtl
+	        if (!menuLeft) {
+	          return 'right';
 	        }
 
-	        if (d > 4356 && d < 43560000) { // 0.1 - 1000 acres
-	            d2 = d / 43560;
-	            unit2 = 'acres';
-	        }
+	        if (anchorLoc[0] - _menuSideMargin - _menuWidth - _tooltipWidth < _vpSideMargin) {
+	          // left tooltips would be too close to the left viewport edge, go right
+	          return 'right';
+	        } // prefer left tooltips
 
-	    } else {
-	        if (d >= 250000) { // > 0.25km² show km²
-	            d1 = d / 1000000;
-	            unit1 = 'square_kilometers';
-	        } else {
-	            d1 = d;
-	            unit1 = 'square_meters';
-	        }
 
-	        if (d > 1000 && d < 10000000) { // 0.1 - 1000 hectares
-	            d2 = d / 10000;
-	            unit2 = 'hectares';
-	        }
+	        return 'left';
+	      }
 	    }
+	  }
 
-	    area = _t('units.' + unit1, {
-	        quantity: d1.toLocaleString(locale, {
-	            maximumSignificantDigits: 4
-	        })
-	    });
+	  editMenu.close = function () {
+	    context.map().on('move.edit-menu', null).on('drawn.edit-menu', null);
 
-	    if (d2) {
-	        return _t('units.area_pair', {
-	            area1: area,
-	            area2: _t('units.' + unit2, {
-	                quantity: d2.toLocaleString(locale, {
-	                    maximumSignificantDigits: 2
-	                })
-	            })
-	        });
-	    } else {
-	        return area;
-	    }
-	}
+	    _menu.remove();
 
-	function wrap(x, min, max) {
-	    var d = max - min;
-	    return ((x - min) % d + d) % d + min;
-	}
+	    _tooltips = [];
+	    dispatch.call('toggled', this, false);
+	  };
 
-	function clamp$1(x, min, max) {
-	    return Math.max(min, Math.min(x, max));
+	  editMenu.anchorLoc = function (val) {
+	    if (!arguments.length) return _anchorLoc;
+	    _anchorLoc = val;
+	    _anchorLocLonLat = context.projection.invert(_anchorLoc);
+	    return editMenu;
+	  };
+
+	  editMenu.triggerType = function (val) {
+	    if (!arguments.length) return _triggerType;
+	    _triggerType = val;
+	    return editMenu;
+	  };
+
+	  editMenu.operations = function (val) {
+	    if (!arguments.length) return _operations;
+	    _operations = val;
+	    return editMenu;
+	  };
+
+	  return utilRebind(editMenu, dispatch, 'on');
 	}
 
-	function displayCoordinate(deg, pos, neg) {
-	    var locale = _mainLocalizer.localeCode();
-	    var min = (Math.abs(deg) - Math.floor(Math.abs(deg))) * 60;
-	    var sec = (min - Math.floor(min)) * 60;
-	    var displayDegrees = _t('units.arcdegrees', {
-	        quantity: Math.floor(Math.abs(deg)).toLocaleString(locale)
-	    });
-	    var displayCoordinate;
-
-	    if (Math.floor(sec) > 0) {
-	        displayCoordinate = displayDegrees +
-	            _t('units.arcminutes', {
-	                quantity: Math.floor(min).toLocaleString(locale)
-	            }) +
-	            _t('units.arcseconds', {
-	                quantity: Math.round(sec).toLocaleString(locale)
-	            });
-	    } else if (Math.floor(min) > 0) {
-	        displayCoordinate = displayDegrees +
-	            _t('units.arcminutes', {
-	                quantity: Math.round(min).toLocaleString(locale)
-	            });
-	    } else {
-	        displayCoordinate = _t('units.arcdegrees', {
-	            quantity: Math.round(Math.abs(deg)).toLocaleString(locale)
+	function uiFeatureInfo(context) {
+	  function update(selection) {
+	    var features = context.features();
+	    var stats = features.stats();
+	    var count = 0;
+	    var hiddenList = features.hidden().map(function (k) {
+	      if (stats[k]) {
+	        count += stats[k];
+	        return _t('inspector.title_count', {
+	          title: _t.html('feature.' + k + '.description'),
+	          count: stats[k]
 	        });
-	    }
+	      }
 
-	    if (deg === 0) {
-	        return displayCoordinate;
-	    } else {
-	        return _t('units.coordinate', {
-	            coordinate: displayCoordinate,
-	            direction: _t('units.' + (deg > 0 ? pos : neg))
-	        });
+	      return null;
+	    }).filter(Boolean);
+	    selection.html('');
+
+	    if (hiddenList.length) {
+	      var tooltipBehavior = uiTooltip().placement('top').title(function () {
+	        return hiddenList.join('<br/>');
+	      });
+	      selection.append('a').attr('class', 'chip').attr('href', '#').html(_t.html('feature_info.hidden_warning', {
+	        count: count
+	      })).call(tooltipBehavior).on('click', function (d3_event) {
+	        tooltipBehavior.hide();
+	        d3_event.preventDefault(); // open the Map Data pane
+
+	        context.ui().togglePanes(context.container().select('.map-panes .map-data-pane'));
+	      });
 	    }
-	}
 
-	/**
-	 * Returns given coordinate pair in degree-minute-second format.
-	 *
-	 * @param {Array<Number>} coord longitude and latitude
-	 */
-	function dmsCoordinatePair(coord) {
-	    return _t('units.coordinate_pair', {
-	        latitude: displayCoordinate(clamp$1(coord[1], -90, 90), 'north', 'south'),
-	        longitude: displayCoordinate(wrap(coord[0], -180, 180), 'east', 'west')
-	    });
-	}
+	    selection.classed('hide', !hiddenList.length);
+	  }
 
-	/**
-	 * Returns the given coordinate pair in decimal format.
-	 * note: unlocalized to avoid comma ambiguity - see #4765
-	 *
-	 * @param {Array<Number>} coord longitude and latitude
-	 */
-	function decimalCoordinatePair(coord) {
-	    return _t('units.coordinate_pair', {
-	        latitude: clamp$1(coord[1], -90, 90).toFixed(OSM_PRECISION),
-	        longitude: wrap(coord[0], -180, 180).toFixed(OSM_PRECISION)
+	  return function (selection) {
+	    update(selection);
+	    context.features().on('change.feature_info', function () {
+	      update(selection);
 	    });
+	  };
 	}
 
-	function uiPanelLocation(context) {
-	    var currLocation = '';
+	function uiFlash(context) {
+	  var _flashTimer;
+
+	  var _duration = 2000;
+	  var _iconName = '#iD-icon-no';
+	  var _iconClass = 'disabled';
+	  var _label = '';
+
+	  function flash() {
+	    if (_flashTimer) {
+	      _flashTimer.stop();
+	    }
+
+	    context.container().select('.main-footer-wrap').classed('footer-hide', true).classed('footer-show', false);
+	    context.container().select('.flash-wrap').classed('footer-hide', false).classed('footer-show', true);
+	    var content = context.container().select('.flash-wrap').selectAll('.flash-content').data([0]); // Enter
+
+	    var contentEnter = content.enter().append('div').attr('class', 'flash-content');
+	    var iconEnter = contentEnter.append('svg').attr('class', 'flash-icon icon').append('g').attr('transform', 'translate(10,10)');
+	    iconEnter.append('circle').attr('r', 9);
+	    iconEnter.append('use').attr('transform', 'translate(-7,-7)').attr('width', '14').attr('height', '14');
+	    contentEnter.append('div').attr('class', 'flash-text'); // Update
+
+	    content = content.merge(contentEnter);
+	    content.selectAll('.flash-icon').attr('class', 'icon flash-icon ' + (_iconClass || ''));
+	    content.selectAll('.flash-icon use').attr('xlink:href', _iconName);
+	    content.selectAll('.flash-text').attr('class', 'flash-text').html(_label);
+	    _flashTimer = d3_timeout(function () {
+	      _flashTimer = null;
+	      context.container().select('.main-footer-wrap').classed('footer-hide', false).classed('footer-show', true);
+	      context.container().select('.flash-wrap').classed('footer-hide', true).classed('footer-show', false);
+	    }, _duration);
+	    return content;
+	  }
+
+	  flash.duration = function (_) {
+	    if (!arguments.length) return _duration;
+	    _duration = _;
+	    return flash;
+	  };
 
+	  flash.label = function (_) {
+	    if (!arguments.length) return _label;
+	    _label = _;
+	    return flash;
+	  };
 
-	    function redraw(selection) {
-	        selection.html('');
+	  flash.iconName = function (_) {
+	    if (!arguments.length) return _iconName;
+	    _iconName = _;
+	    return flash;
+	  };
 
-	        var list = selection
-	            .append('ul');
+	  flash.iconClass = function (_) {
+	    if (!arguments.length) return _iconClass;
+	    _iconClass = _;
+	    return flash;
+	  };
 
-	        // Mouse coordinates
-	        var coord = context.map().mouseCoordinates();
-	        if (coord.some(isNaN)) {
-	            coord = context.map().center();
-	        }
+	  return flash;
+	}
 
-	        list
-	            .append('li')
-	            .text(dmsCoordinatePair(coord))
-	            .append('li')
-	            .text(decimalCoordinatePair(coord));
+	function uiFullScreen(context) {
+	  var element = context.container().node(); // var button = d3_select(null);
 
-	        // Location Info
-	        selection
-	            .append('div')
-	            .attr('class', 'location-info')
-	            .text(currLocation || ' ');
+	  function getFullScreenFn() {
+	    if (element.requestFullscreen) {
+	      return element.requestFullscreen;
+	    } else if (element.msRequestFullscreen) {
+	      return element.msRequestFullscreen;
+	    } else if (element.mozRequestFullScreen) {
+	      return element.mozRequestFullScreen;
+	    } else if (element.webkitRequestFullscreen) {
+	      return element.webkitRequestFullscreen;
+	    }
+	  }
 
-	        debouncedGetLocation(selection, coord);
+	  function getExitFullScreenFn() {
+	    if (document.exitFullscreen) {
+	      return document.exitFullscreen;
+	    } else if (document.msExitFullscreen) {
+	      return document.msExitFullscreen;
+	    } else if (document.mozCancelFullScreen) {
+	      return document.mozCancelFullScreen;
+	    } else if (document.webkitExitFullscreen) {
+	      return document.webkitExitFullscreen;
 	    }
+	  }
 
+	  function isFullScreen() {
+	    return document.fullscreenElement || document.mozFullScreenElement || document.webkitFullscreenElement || document.msFullscreenElement;
+	  }
 
-	    var debouncedGetLocation = debounce(getLocation, 250);
-	    function getLocation(selection, coord) {
-	        if (!services.geocoder) {
-	            currLocation = _t('info_panels.location.unknown_location');
-	            selection.selectAll('.location-info')
-	                .text(currLocation);
-	        } else {
-	            services.geocoder.reverse(coord, function(err, result) {
-	                currLocation = result ? result.display_name : _t('info_panels.location.unknown_location');
-	                selection.selectAll('.location-info')
-	                    .text(currLocation);
-	            });
-	        }
-	    }
+	  function isSupported() {
+	    return !!getFullScreenFn();
+	  }
 
+	  function fullScreen(d3_event) {
+	    d3_event.preventDefault();
 
-	    var panel = function(selection) {
-	        selection.call(redraw);
+	    if (!isFullScreen()) {
+	      // button.classed('active', true);
+	      getFullScreenFn().apply(element);
+	    } else {
+	      // button.classed('active', false);
+	      getExitFullScreenFn().apply(document);
+	    }
+	  }
 
-	        context.surface()
-	            .on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'move.info-location', function() {
-	                selection.call(redraw);
-	            });
-	    };
+	  return function () {
+	    // selection) {
+	    if (!isSupported()) return; // button = selection.append('button')
+	    //     .attr('title', t('full_screen'))
+	    //     .on('click', fullScreen)
+	    //     .call(tooltip);
+	    // button.append('span')
+	    //     .attr('class', 'icon full-screen');
 
-	    panel.off = function() {
-	        context.surface()
-	            .on('.info-location', null);
-	    };
+	    var detected = utilDetect();
+	    var keys = detected.os === 'mac' ? [uiCmd('⌃⌘F'), 'f11'] : ['f11'];
+	    context.keybinding().on(keys, fullScreen);
+	  };
+	}
 
-	    panel.id = 'location';
-	    panel.title = _t('info_panels.location.title');
-	    panel.key = _t('info_panels.location.key');
+	function uiGeolocate(context) {
+	  var _geolocationOptions = {
+	    // prioritize speed and power usage over precision
+	    enableHighAccuracy: false,
+	    // don't hang indefinitely getting the location
+	    timeout: 6000 // 6sec
 
+	  };
 
-	    return panel;
-	}
+	  var _locating = uiLoading(context).message(_t.html('geolocate.locating')).blocking(true);
 
-	function uiPanelMeasurement(context) {
-	    var locale = _mainLocalizer.localeCode();
-	    var isImperial = !_mainLocalizer.usesMetric();
+	  var _layer = context.layers().layer('geolocate');
 
+	  var _position;
 
-	    function radiansToMeters(r) {
-	        // using WGS84 authalic radius (6371007.1809 m)
-	        return r * 6371007.1809;
-	    }
+	  var _extent;
 
-	    function steradiansToSqmeters(r) {
-	        // http://gis.stackexchange.com/a/124857/40446
-	        return r / (4 * Math.PI) * 510065621724000;
-	    }
+	  var _timeoutID;
 
+	  var _button = select(null);
 
-	    function toLineString(feature) {
-	        if (feature.type === 'LineString') { return feature; }
+	  function click() {
+	    if (context.inIntro()) return;
 
-	        var result = { type: 'LineString', coordinates: [] };
-	        if (feature.type === 'Polygon') {
-	            result.coordinates = feature.coordinates[0];
-	        } else if (feature.type === 'MultiPolygon') {
-	            result.coordinates = feature.coordinates[0][0];
-	        }
+	    if (!_layer.enabled() && !_locating.isShown()) {
+	      // This timeout ensures that we still call finish() even if
+	      // the user declines to share their location in Firefox
+	      _timeoutID = setTimeout(error, 10000
+	      /* 10sec */
+	      );
+	      context.container().call(_locating); // get the latest position even if we already have one
 
-	        return result;
-	    }
+	      navigator.geolocation.getCurrentPosition(success, error, _geolocationOptions);
+	    } else {
+	      _locating.close();
 
+	      _layer.enabled(null, false);
 
-	    function redraw(selection) {
-	        var graph = context.graph();
-	        var selectedNoteID = context.selectedNoteID();
-	        var osm = services.osm;
+	      updateButtonState();
+	    }
+	  }
 
-	        var heading;
-	        var center, location, centroid;
-	        var closed, geometry;
-	        var totalNodeCount, length = 0, area = 0;
+	  function zoomTo() {
+	    context.enter(modeBrowse(context));
+	    var map = context.map();
 
-	        if (selectedNoteID && osm) {       // selected 1 note
+	    _layer.enabled(_position, true);
 
-	            var note = osm.getNote(selectedNoteID);
-	            heading = _t('note.note') + ' ' + selectedNoteID;
-	            location = note.loc;
-	            geometry = 'note';
+	    updateButtonState();
+	    map.centerZoomEase(_extent.center(), Math.min(20, map.extentZoom(_extent)));
+	  }
 
-	        } else {                           // selected 1..n entities
-	            var selectedIDs = context.selectedIDs().filter(function(id) {
-	                return context.hasEntity(id);
-	            });
-	            var selected = selectedIDs.map(function(id) {
-	                return context.entity(id);
-	            });
+	  function success(geolocation) {
+	    _position = geolocation;
+	    var coords = _position.coords;
+	    _extent = geoExtent([coords.longitude, coords.latitude]).padByMeters(coords.accuracy);
+	    zoomTo();
+	    finish();
+	  }
 
-	            heading = selected.length === 1 ? selected[0].id :
-	                _t('info_panels.measurement.selected', { n: selected.length.toLocaleString(locale) });
-
-	            if (selected.length) {
-	                var extent = geoExtent();
-	                for (var i in selected) {
-	                    var entity = selected[i];
-	                    extent._extend(entity.extent(graph));
-
-	                    geometry = entity.geometry(graph);
-	                    if (geometry === 'line' || geometry === 'area') {
-	                        closed = (entity.type === 'relation') || (entity.isClosed() && !entity.isDegenerate());
-	                        var feature = entity.asGeoJSON(graph);
-	                        length += radiansToMeters(d3_geoLength(toLineString(feature)));
-	                        centroid = d3_geoCentroid(feature);
-	                        if (closed) {
-	                            area += steradiansToSqmeters(entity.area(graph));
-	                        }
-	                    }
-	                }
+	  function error() {
+	    if (_position) {
+	      // use the position from a previous call if we have one
+	      zoomTo();
+	    } else {
+	      context.ui().flash.label(_t.html('geolocate.location_unavailable')).iconName('#iD-icon-geolocate')();
+	    }
 
-	                if (selected.length > 1) {
-	                    geometry = null;
-	                    closed = null;
-	                    centroid = null;
-	                }
+	    finish();
+	  }
 
-	                if (selected.length === 1 && selected[0].type === 'node') {
-	                    location = selected[0].loc;
-	                } else {
-	                    totalNodeCount = utilGetAllNodes(selectedIDs, context.graph()).length;
-	                }
+	  function finish() {
+	    _locating.close(); // unblock ui
 
-	                if (!location && !centroid) {
-	                    center = extent.center();
-	                }
-	            }
-	        }
 
-	        selection.html('');
+	    if (_timeoutID) {
+	      clearTimeout(_timeoutID);
+	    }
 
-	        if (heading) {
-	            selection
-	                .append('h4')
-	                .attr('class', 'measurement-heading')
-	                .text(heading);
-	        }
+	    _timeoutID = undefined;
+	  }
 
-	        var list = selection
-	            .append('ul');
-	        var coordItem;
+	  function updateButtonState() {
+	    _button.classed('active', _layer.enabled());
+	  }
 
-	        if (geometry) {
-	            list
-	                .append('li')
-	                .text(_t('info_panels.measurement.geometry') + ':')
-	                .append('span')
-	                .text(
-	                    closed ? _t('info_panels.measurement.closed_' + geometry) : _t('geometry.' + geometry)
-	                );
-	        }
+	  return function (selection) {
+	    if (!navigator.geolocation || !navigator.geolocation.getCurrentPosition) return;
+	    _button = selection.append('button').on('click', click).call(svgIcon('#iD-icon-geolocate', 'light')).call(uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(_t.html('geolocate.title')).keys([_t('geolocate.key')]));
+	    context.keybinding().on(_t('geolocate.key'), click);
+	  };
+	}
 
-	        if (totalNodeCount) {
-	            list
-	                .append('li')
-	                .text(_t('info_panels.measurement.node_count') + ':')
-	                .append('span')
-	                .text(totalNodeCount.toLocaleString(locale));
-	        }
-
-	        if (area) {
-	            list
-	                .append('li')
-	                .text(_t('info_panels.measurement.area') + ':')
-	                .append('span')
-	                .text(displayArea(area, isImperial));
-	        }
-
-	        if (length) {
-	            var lengthLabel = _t('info_panels.measurement.' + (closed ? 'perimeter' : 'length'));
-	            list
-	                .append('li')
-	                .text(lengthLabel + ':')
-	                .append('span')
-	                .text(displayLength(length, isImperial));
-	        }
-
-	        if (location) {
-	            coordItem = list
-	                .append('li')
-	                .text(_t('info_panels.measurement.location') + ':');
-	            coordItem.append('span')
-	                .text(dmsCoordinatePair(location));
-	            coordItem.append('span')
-	                .text(decimalCoordinatePair(location));
-	        }
-
-	        if (centroid) {
-	            coordItem = list
-	                .append('li')
-	                .text(_t('info_panels.measurement.centroid') + ':');
-	            coordItem.append('span')
-	                .text(dmsCoordinatePair(centroid));
-	            coordItem.append('span')
-	                .text(decimalCoordinatePair(centroid));
-	        }
-
-	        if (center) {
-	            coordItem = list
-	                .append('li')
-	                .text(_t('info_panels.measurement.center') + ':');
-	            coordItem.append('span')
-	                .text(dmsCoordinatePair(center));
-	            coordItem.append('span')
-	                .text(decimalCoordinatePair(center));
-	        }
-
-	        if (length || area) {
-	            var toggle  = isImperial ? 'imperial' : 'metric';
-	            selection
-	                .append('a')
-	                .text(_t('info_panels.measurement.' + toggle))
-	                .attr('href', '#')
-	                .attr('class', 'button button-toggle-units')
-	                .on('click', function() {
-	                    event.preventDefault();
-	                    isImperial = !isImperial;
-	                    selection.call(redraw);
-	                });
-	        }
-	    }
+	function uiPanelBackground(context) {
+	  var background = context.background();
+	  var _currSourceName = null;
+	  var _metadata = {};
+	  var _metadataKeys = ['zoom', 'vintage', 'source', 'description', 'resolution', 'accuracy'];
 
+	  var debouncedRedraw = debounce(redraw, 250);
 
-	    var panel = function(selection) {
-	        selection.call(redraw);
+	  function redraw(selection) {
+	    var source = background.baseLayerSource();
+	    if (!source) return;
+	    var isDG = source.id.match(/^DigitalGlobe/i) !== null;
+	    var sourceLabel = source.label();
 
-	        context.map()
-	            .on('drawn.info-measurement', function() {
-	                selection.call(redraw);
-	            });
+	    if (_currSourceName !== sourceLabel) {
+	      _currSourceName = sourceLabel;
+	      _metadata = {};
+	    }
 
-	        context
-	            .on('enter.info-measurement', function() {
-	                selection.call(redraw);
-	            });
-	    };
+	    selection.html('');
+	    var list = selection.append('ul').attr('class', 'background-info');
+	    list.append('li').html(_currSourceName);
 
-	    panel.off = function() {
-	        context.map().on('drawn.info-measurement', null);
-	        context.on('enter.info-measurement', null);
-	    };
+	    _metadataKeys.forEach(function (k) {
+	      // DigitalGlobe vintage is available in raster layers for now.
+	      if (isDG && k === 'vintage') return;
+	      list.append('li').attr('class', 'background-info-list-' + k).classed('hide', !_metadata[k]).html(_t.html('info_panels.background.' + k) + ':').append('span').attr('class', 'background-info-span-' + k).html(_metadata[k]);
+	    });
 
-	    panel.id = 'measurement';
-	    panel.title = _t('info_panels.measurement.title');
-	    panel.key = _t('info_panels.measurement.key');
+	    debouncedGetMetadata(selection);
+	    var toggleTiles = context.getDebug('tile') ? 'hide_tiles' : 'show_tiles';
+	    selection.append('a').html(_t.html('info_panels.background.' + toggleTiles)).attr('href', '#').attr('class', 'button button-toggle-tiles').on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.setDebug('tile', !context.getDebug('tile'));
+	      selection.call(redraw);
+	    });
 
+	    if (isDG) {
+	      var key = source.id + '-vintage';
+	      var sourceVintage = context.background().findSource(key);
+	      var showsVintage = context.background().showsLayer(sourceVintage);
+	      var toggleVintage = showsVintage ? 'hide_vintage' : 'show_vintage';
+	      selection.append('a').html(_t.html('info_panels.background.' + toggleVintage)).attr('href', '#').attr('class', 'button button-toggle-vintage').on('click', function (d3_event) {
+	        d3_event.preventDefault();
+	        context.background().toggleOverlayLayer(sourceVintage);
+	        selection.call(redraw);
+	      });
+	    } // disable if necessary
 
-	    return panel;
-	}
 
-	var uiInfoPanels = {
-	    background: uiPanelBackground,
-	    history: uiPanelHistory,
-	    location: uiPanelLocation,
-	    measurement: uiPanelMeasurement,
-	};
+	    ['DigitalGlobe-Premium', 'DigitalGlobe-Standard'].forEach(function (layerId) {
+	      if (source.id !== layerId) {
+	        var key = layerId + '-vintage';
+	        var sourceVintage = context.background().findSource(key);
 
-	function uiInfo(context) {
-	    var ids = Object.keys(uiInfoPanels);
-	    var wasActive = ['measurement'];
-	    var panels = {};
-	    var active = {};
-
-	    // create panels
-	    ids.forEach(function(k) {
-	        if (!panels[k]) {
-	            panels[k] = uiInfoPanels[k](context);
-	            active[k] = false;
+	        if (context.background().showsLayer(sourceVintage)) {
+	          context.background().toggleOverlayLayer(sourceVintage);
 	        }
+	      }
 	    });
+	  }
 
+	  var debouncedGetMetadata = debounce(getMetadata, 250);
 
-	    function info(selection) {
+	  function getMetadata(selection) {
+	    var tile = context.container().select('.layer-background img.tile-center'); // tile near viewport center
 
-	        function redraw() {
-	            var activeids = ids.filter(function(k) { return active[k]; }).sort();
+	    if (tile.empty()) return;
+	    var sourceName = _currSourceName;
+	    var d = tile.datum();
+	    var zoom = d && d.length >= 3 && d[2] || Math.floor(context.map().zoom());
+	    var center = context.map().center(); // update zoom
 
-	            var containers = infoPanels.selectAll('.panel-container')
-	                .data(activeids, function(k) { return k; });
+	    _metadata.zoom = String(zoom);
+	    selection.selectAll('.background-info-list-zoom').classed('hide', false).selectAll('.background-info-span-zoom').html(_metadata.zoom);
+	    if (!d || !d.length >= 3) return;
+	    background.baseLayerSource().getMetadata(center, d, function (err, result) {
+	      if (err || _currSourceName !== sourceName) return; // update vintage
 
-	            containers.exit()
-	                .style('opacity', 1)
-	                .transition()
-	                .duration(200)
-	                .style('opacity', 0)
-	                .on('end', function(d) {
-	                    select(this)
-	                        .call(panels[d].off)
-	                        .remove();
-	                });
+	      var vintage = result.vintage;
+	      _metadata.vintage = vintage && vintage.range || _t('info_panels.background.unknown');
+	      selection.selectAll('.background-info-list-vintage').classed('hide', false).selectAll('.background-info-span-vintage').html(_metadata.vintage); // update other _metadata
 
-	            var enter = containers.enter()
-	                .append('div')
-	                .attr('class', function(d) { return 'fillD2 panel-container panel-container-' + d; });
+	      _metadataKeys.forEach(function (k) {
+	        if (k === 'zoom' || k === 'vintage') return; // done already
 
-	            enter
-	                .style('opacity', 0)
-	                .transition()
-	                .duration(200)
-	                .style('opacity', 1);
+	        var val = result[k];
+	        _metadata[k] = val;
+	        selection.selectAll('.background-info-list-' + k).classed('hide', !val).selectAll('.background-info-span-' + k).html(val);
+	      });
+	    });
+	  }
 
-	            var title = enter
-	                .append('div')
-	                .attr('class', 'panel-title fillD2');
+	  var panel = function panel(selection) {
+	    selection.call(redraw);
+	    context.map().on('drawn.info-background', function () {
+	      selection.call(debouncedRedraw);
+	    }).on('move.info-background', function () {
+	      selection.call(debouncedGetMetadata);
+	    });
+	  };
 
-	            title
-	                .append('h3')
-	                .text(function(d) { return panels[d].title; });
+	  panel.off = function () {
+	    context.map().on('drawn.info-background', null).on('move.info-background', null);
+	  };
 
-	            title
-	                .append('button')
-	                .attr('class', 'close')
-	                .on('click', function (d) { info.toggle(d); })
-	                .call(svgIcon('#iD-icon-close'));
+	  panel.id = 'background';
+	  panel.label = _t.html('info_panels.background.title');
+	  panel.key = _t('info_panels.background.key');
+	  return panel;
+	}
 
-	            enter
-	                .append('div')
-	                .attr('class', function(d) { return 'panel-content panel-content-' + d; });
+	function uiPanelHistory(context) {
+	  var osm;
 
+	  function displayTimestamp(timestamp) {
+	    if (!timestamp) return _t('info_panels.history.unknown');
+	    var options = {
+	      day: 'numeric',
+	      month: 'short',
+	      year: 'numeric',
+	      hour: 'numeric',
+	      minute: 'numeric',
+	      second: 'numeric'
+	    };
+	    var d = new Date(timestamp);
+	    if (isNaN(d.getTime())) return _t('info_panels.history.unknown');
+	    return d.toLocaleString(_mainLocalizer.localeCode(), options);
+	  }
 
-	            // redraw the panels
-	            infoPanels.selectAll('.panel-content')
-	                .each(function(d) {
-	                    select(this).call(panels[d]);
-	                });
-	        }
+	  function displayUser(selection, userName) {
+	    if (!userName) {
+	      selection.append('span').html(_t.html('info_panels.history.unknown'));
+	      return;
+	    }
 
+	    selection.append('span').attr('class', 'user-name').html(userName);
+	    var links = selection.append('div').attr('class', 'links');
 
-	        info.toggle = function(which) {
-	            if (event) {
-	                event.stopImmediatePropagation();
-	                event.preventDefault();
-	            }
+	    if (osm) {
+	      links.append('a').attr('class', 'user-osm-link').attr('href', osm.userURL(userName)).attr('target', '_blank').html('OSM');
+	    }
 
-	            var activeids = ids.filter(function(k) { return active[k]; });
+	    links.append('a').attr('class', 'user-hdyc-link').attr('href', 'https://hdyc.neis-one.org/?' + userName).attr('target', '_blank').attr('tabindex', -1).html('HDYC');
+	  }
 
-	            if (which) {  // toggle one
-	                active[which] = !active[which];
-	                if (activeids.length === 1 && activeids[0] === which) {  // none active anymore
-	                    wasActive = [which];
-	                }
+	  function displayChangeset(selection, changeset) {
+	    if (!changeset) {
+	      selection.append('span').html(_t.html('info_panels.history.unknown'));
+	      return;
+	    }
 
-	                context.container().select('.' + which + '-panel-toggle-item')
-	                    .classed('active', active[which])
-	                    .select('input')
-	                    .property('checked', active[which]);
+	    selection.append('span').attr('class', 'changeset-id').html(changeset);
+	    var links = selection.append('div').attr('class', 'links');
 
-	            } else {      // toggle all
-	                if (activeids.length) {
-	                    wasActive = activeids;
-	                    activeids.forEach(function(k) { active[k] = false; });
-	                } else {
-	                    wasActive.forEach(function(k) { active[k] = true; });
-	                }
-	            }
+	    if (osm) {
+	      links.append('a').attr('class', 'changeset-osm-link').attr('href', osm.changesetURL(changeset)).attr('target', '_blank').html('OSM');
+	    }
 
-	            redraw();
-	        };
+	    links.append('a').attr('class', 'changeset-osmcha-link').attr('href', 'https://osmcha.org/changesets/' + changeset).attr('target', '_blank').html('OSMCha');
+	    links.append('a').attr('class', 'changeset-achavi-link').attr('href', 'https://overpass-api.de/achavi/?changeset=' + changeset).attr('target', '_blank').html('Achavi');
+	  }
 
+	  function redraw(selection) {
+	    var selectedNoteID = context.selectedNoteID();
+	    osm = context.connection();
+	    var selected, note, entity;
 
-	        var infoPanels = selection.selectAll('.info-panels')
-	            .data([0]);
+	    if (selectedNoteID && osm) {
+	      // selected 1 note
+	      selected = [_t('note.note') + ' ' + selectedNoteID];
+	      note = osm.getNote(selectedNoteID);
+	    } else {
+	      // selected 1..n entities
+	      selected = context.selectedIDs().filter(function (e) {
+	        return context.hasEntity(e);
+	      });
 
-	        infoPanels = infoPanels.enter()
-	            .append('div')
-	            .attr('class', 'info-panels')
-	            .merge(infoPanels);
+	      if (selected.length) {
+	        entity = context.entity(selected[0]);
+	      }
+	    }
 
-	        redraw();
+	    var singular = selected.length === 1 ? selected[0] : null;
+	    selection.html('');
+	    selection.append('h4').attr('class', 'history-heading').html(singular || _t.html('info_panels.selected', {
+	      n: selected.length
+	    }));
+	    if (!singular) return;
 
-	        context.keybinding()
-	            .on(uiCmd('⌘' + _t('info_panels.key')), info.toggle);
+	    if (entity) {
+	      selection.call(redrawEntity, entity);
+	    } else if (note) {
+	      selection.call(redrawNote, note);
+	    }
+	  }
 
-	        ids.forEach(function(k) {
-	            var key = _t('info_panels.' + k + '.key', { default: null });
-	            if (!key) { return; }
-	            context.keybinding()
-	                .on(uiCmd('⌘⇧' + key), function() { info.toggle(k); });
-	        });
+	  function redrawNote(selection, note) {
+	    if (!note || note.isNew()) {
+	      selection.append('div').html(_t.html('info_panels.history.note_no_history'));
+	      return;
 	    }
 
-	    return info;
-	}
+	    var list = selection.append('ul');
+	    list.append('li').html(_t.html('info_panels.history.note_comments') + ':').append('span').html(note.comments.length);
 
-	function pointBox(loc, context) {
-	    var rect = context.surfaceRect();
-	    var point = context.curtainProjection(loc);
-	    return {
-	        left: point[0] + rect.left - 40,
-	        top: point[1] + rect.top - 60,
-	        width: 80,
-	        height: 90
-	    };
-	}
+	    if (note.comments.length) {
+	      list.append('li').html(_t.html('info_panels.history.note_created_date') + ':').append('span').html(displayTimestamp(note.comments[0].date));
+	      list.append('li').html(_t.html('info_panels.history.note_created_user') + ':').call(displayUser, note.comments[0].user);
+	    }
 
+	    if (osm) {
+	      selection.append('a').attr('class', 'view-history-on-osm').attr('target', '_blank').attr('href', osm.noteURL(note)).call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html('info_panels.history.note_link_text'));
+	    }
+	  }
 
-	function pad(locOrBox, padding, context) {
-	    var box;
-	    if (locOrBox instanceof Array) {
-	        var rect = context.surfaceRect();
-	        var point = context.curtainProjection(locOrBox);
-	        box = {
-	            left: point[0] + rect.left,
-	            top: point[1] + rect.top
-	        };
-	    } else {
-	        box = locOrBox;
+	  function redrawEntity(selection, entity) {
+	    if (!entity || entity.isNew()) {
+	      selection.append('div').html(_t.html('info_panels.history.no_history'));
+	      return;
 	    }
 
-	    return {
-	        left: box.left - padding,
-	        top: box.top - padding,
-	        width: (box.width || 0) + 2 * padding,
-	        height: (box.width || 0) + 2 * padding
-	    };
-	}
+	    var links = selection.append('div').attr('class', 'links');
 
+	    if (osm) {
+	      links.append('a').attr('class', 'view-history-on-osm').attr('href', osm.historyURL(entity)).attr('target', '_blank').attr('title', _t('info_panels.history.link_text')).html('OSM');
+	    }
 
-	function icon(name, svgklass, useklass) {
-	    return '<svg class="icon ' + (svgklass || '') + '">' +
-	         '<use xlink:href="' + name + '"' +
-	         (useklass ? ' class="' + useklass + '"' : '') + '></use></svg>';
-	}
+	    links.append('a').attr('class', 'pewu-history-viewer-link').attr('href', 'https://pewu.github.io/osm-history/#/' + entity.type + '/' + entity.osmId()).attr('target', '_blank').attr('tabindex', -1).html('PeWu');
+	    var list = selection.append('ul');
+	    list.append('li').html(_t.html('info_panels.history.version') + ':').append('span').html(entity.version);
+	    list.append('li').html(_t.html('info_panels.history.last_edit') + ':').append('span').html(displayTimestamp(entity.timestamp));
+	    list.append('li').html(_t.html('info_panels.history.edited_by') + ':').call(displayUser, entity.user);
+	    list.append('li').html(_t.html('info_panels.history.changeset') + ':').call(displayChangeset, entity.changeset);
+	  }
 
-	var helpStringReplacements;
+	  var panel = function panel(selection) {
+	    selection.call(redraw);
+	    context.map().on('drawn.info-history', function () {
+	      selection.call(redraw);
+	    });
+	    context.on('enter.info-history', function () {
+	      selection.call(redraw);
+	    });
+	  };
 
-	// Returns the localized string for `id` with a standardized set of icon, key, and
-	// label replacements suitable for tutorials and documentation. Optionally supplemented
-	// with custom `replacements`
-	function helpString(id, replacements) {
-	    // only load these the first time
-	    if (!helpStringReplacements) { helpStringReplacements = {
-	        // insert icons corresponding to various UI elements
-	        point_icon: icon('#iD-icon-point', 'pre-text'),
-	        line_icon: icon('#iD-icon-line', 'pre-text'),
-	        area_icon: icon('#iD-icon-area', 'pre-text'),
-	        note_icon: icon('#iD-icon-note', 'pre-text add-note'),
-	        plus: icon('#iD-icon-plus', 'pre-text'),
-	        minus: icon('#iD-icon-minus', 'pre-text'),
-	        move_icon: icon('#iD-operation-move', 'pre-text operation'),
-	        merge_icon: icon('#iD-operation-merge', 'pre-text operation'),
-	        delete_icon: icon('#iD-operation-delete', 'pre-text operation'),
-	        circularize_icon: icon('#iD-operation-circularize', 'pre-text operation'),
-	        split_icon: icon('#iD-operation-split', 'pre-text operation'),
-	        orthogonalize_icon: icon('#iD-operation-orthogonalize', 'pre-text operation'),
-	        disconnect_icon: icon('#iD-operation-disconnect', 'pre-text operation'),
-	        layers_icon: icon('#iD-icon-layers', 'pre-text'),
-	        data_icon: icon('#iD-icon-data', 'pre-text'),
-	        inspect: icon('#iD-icon-inspect', 'pre-text'),
-	        help_icon: icon('#iD-icon-help', 'pre-text'),
-	        undo_icon: icon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-redo' : '#iD-icon-undo', 'pre-text'),
-	        redo_icon: icon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-undo' : '#iD-icon-redo', 'pre-text'),
-	        save_icon: icon('#iD-icon-save', 'pre-text'),
-	        leftclick: icon('#iD-walkthrough-mouse-left', 'pre-text operation'),
-	        rightclick: icon('#iD-walkthrough-mouse-right', 'pre-text operation'),
-	        mousewheel_icon: icon('#iD-walkthrough-mousewheel', 'pre-text operation'),
-	        tap_icon: icon('#iD-walkthrough-tap', 'pre-text operation'),
-	        doubletap_icon: icon('#iD-walkthrough-doubletap', 'pre-text operation'),
-	        longpress_icon: icon('#iD-walkthrough-longpress', 'pre-text operation'),
-	        touchdrag_icon: icon('#iD-walkthrough-touchdrag', 'pre-text operation'),
-	        pinch_icon: icon('#iD-walkthrough-pinch-apart', 'pre-text operation'),
-
-	        // insert keys; may be localized and platform-dependent
-	        shift: uiCmd.display('⇧'),
-	        alt: uiCmd.display('⌥'),
-	        return: uiCmd.display('↵'),
-	        esc: _t('shortcuts.key.esc'),
-	        space: _t('shortcuts.key.space'),
-	        add_note_key: _t('modes.add_note.key'),
-	        help_key: _t('help.key'),
-	        shortcuts_key: _t('shortcuts.toggle.key'),
-
-	        // reference localized UI labels directly so that they'll always match
-	        save: _t('save.title'),
-	        undo: _t('undo.title'),
-	        redo: _t('redo.title'),
-	        upload: _t('commit.save'),
-	        point: _t('modes.add_point.title'),
-	        line: _t('modes.add_line.title'),
-	        area: _t('modes.add_area.title'),
-	        note: _t('modes.add_note.label'),
-	        delete: _t('operations.delete.title'),
-	        move: _t('operations.move.title'),
-	        orthogonalize: _t('operations.orthogonalize.title'),
-	        circularize: _t('operations.circularize.title'),
-	        merge: _t('operations.merge.title'),
-	        disconnect: _t('operations.disconnect.title'),
-	        split: _t('operations.split.title'),
-	        map_data: _t('map_data.title'),
-	        osm_notes: _t('map_data.layers.notes.title'),
-	        fields: _t('inspector.fields'),
-	        tags: _t('inspector.tags'),
-	        relations: _t('inspector.relations'),
-	        new_relation: _t('inspector.new_relation'),
-	        turn_restrictions: _t('presets.fields.restrictions.label'),
-	        background_settings: _t('background.description'),
-	        imagery_offset: _t('background.fix_misalignment'),
-	        start_the_walkthrough: _t('splash.walkthrough'),
-	        help: _t('help.title'),
-	        ok: _t('intro.ok')
-	    }; }
-
-	    var reps;
-	    if (replacements) {
-	        reps = Object.assign(replacements, helpStringReplacements);
-	    } else {
-	        reps = helpStringReplacements;
-	    }
+	  panel.off = function () {
+	    context.map().on('drawn.info-history', null);
+	    context.on('enter.info-history', null);
+	  };
 
-	    return _t(id, reps)
-	         // use keyboard key styling for shortcuts
-	        .replace(/\`(.*?)\`/g, '<kbd>$1</kbd>');
+	  panel.id = 'history';
+	  panel.label = _t.html('info_panels.history.title');
+	  panel.key = _t('info_panels.history.key');
+	  return panel;
 	}
 
+	var OSM_PRECISION = 7;
+	/**
+	 * Returns a localized representation of the given length measurement.
+	 *
+	 * @param {Number} m area in meters
+	 * @param {Boolean} isImperial true for U.S. customary units; false for metric
+	 */
 
-	function slugify(text) {
-	    return text.toString().toLowerCase()
-	        .replace(/\s+/g, '-')           // Replace spaces with -
-	        .replace(/[^\w\-]+/g, '')       // Remove all non-word chars
-	        .replace(/\-\-+/g, '-')         // Replace multiple - with single -
-	        .replace(/^-+/, '')             // Trim - from start of text
-	        .replace(/-+$/, '');            // Trim - from end of text
-	}
-
+	function displayLength(m, isImperial) {
+	  var d = m * (isImperial ? 3.28084 : 1);
+	  var unit;
 
-	// console warning for missing walkthrough names
-	var missingStrings = {};
-	function checkKey(key, text) {
-	    if (_t(key, { default: undefined}) === undefined) {
-	        if (missingStrings.hasOwnProperty(key)) { return; }  // warn once
-	        missingStrings[key] = text;
-	        var missing = key + ': ' + text;
-	        if (typeof console !== 'undefined') { console.log(missing); } // eslint-disable-line
+	  if (isImperial) {
+	    if (d >= 5280) {
+	      d /= 5280;
+	      unit = 'miles';
+	    } else {
+	      unit = 'feet';
 	    }
-	}
-
+	  } else {
+	    if (d >= 1000) {
+	      d /= 1000;
+	      unit = 'kilometers';
+	    } else {
+	      unit = 'meters';
+	    }
+	  }
 
-	function localize(obj) {
-	    var key;
+	  return _t('units.' + unit, {
+	    quantity: d.toLocaleString(_mainLocalizer.localeCode(), {
+	      maximumSignificantDigits: 4
+	    })
+	  });
+	}
+	/**
+	 * Returns a localized representation of the given area measurement.
+	 *
+	 * @param {Number} m2 area in square meters
+	 * @param {Boolean} isImperial true for U.S. customary units; false for metric
+	 */
 
-	    // Assign name if entity has one..
-	    var name = obj.tags && obj.tags.name;
-	    if (name) {
-	        key = 'intro.graph.name.' + slugify(name);
-	        obj.tags.name = _t(key, { default: name });
-	        checkKey(key, name);
-	    }
-
-	    // Assign street name if entity has one..
-	    var street = obj.tags && obj.tags['addr:street'];
-	    if (street) {
-	        key = 'intro.graph.name.' + slugify(street);
-	        obj.tags['addr:street'] = _t(key, { default: street });
-	        checkKey(key, street);
-
-	        // Add address details common across walkthrough..
-	        var addrTags = [
-	            'block_number', 'city', 'county', 'district', 'hamlet', 'neighbourhood',
-	            'postcode', 'province', 'quarter', 'state', 'subdistrict', 'suburb'
-	        ];
-	        addrTags.forEach(function(k) {
-	            var key = 'intro.graph.' + k;
-	            var tag = 'addr:' + k;
-	            var val = obj.tags && obj.tags[tag];
-	            var str = _t(key, { default: val });
-
-	            if (str) {
-	                if (str.match(/^<.*>$/) !== null) {
-	                    delete obj.tags[tag];
-	                } else {
-	                    obj.tags[tag] = str;
-	                }
-	            }
-	        });
+	function displayArea(m2, isImperial) {
+	  var locale = _mainLocalizer.localeCode();
+	  var d = m2 * (isImperial ? 10.7639111056 : 1);
+	  var d1, d2, area;
+	  var unit1 = '';
+	  var unit2 = '';
+
+	  if (isImperial) {
+	    if (d >= 6969600) {
+	      // > 0.25mi² show mi²
+	      d1 = d / 27878400;
+	      unit1 = 'square_miles';
+	    } else {
+	      d1 = d;
+	      unit1 = 'square_feet';
 	    }
 
-	    return obj;
-	}
+	    if (d > 4356 && d < 43560000) {
+	      // 0.1 - 1000 acres
+	      d2 = d / 43560;
+	      unit2 = 'acres';
+	    }
+	  } else {
+	    if (d >= 250000) {
+	      // > 0.25km² show km²
+	      d1 = d / 1000000;
+	      unit1 = 'square_kilometers';
+	    } else {
+	      d1 = d;
+	      unit1 = 'square_meters';
+	    }
 
+	    if (d > 1000 && d < 10000000) {
+	      // 0.1 - 1000 hectares
+	      d2 = d / 10000;
+	      unit2 = 'hectares';
+	    }
+	  }
 
-	// Used to detect squareness.. some duplicataion of code from actionOrthogonalize.
-	function isMostlySquare(points) {
-	    // note: uses 15 here instead of the 12 from actionOrthogonalize because
-	    // actionOrthogonalize can actually straighten some larger angles as it iterates
-	    var threshold = 15; // degrees within right or straight
-	    var lowerBound = Math.cos((90 - threshold) * Math.PI / 180);  // near right
-	    var upperBound = Math.cos(threshold * Math.PI / 180);         // near straight
+	  area = _t('units.' + unit1, {
+	    quantity: d1.toLocaleString(locale, {
+	      maximumSignificantDigits: 4
+	    })
+	  });
 
-	    for (var i = 0; i < points.length; i++) {
-	        var a = points[(i - 1 + points.length) % points.length];
-	        var origin = points[i];
-	        var b = points[(i + 1) % points.length];
+	  if (d2) {
+	    return _t('units.area_pair', {
+	      area1: area,
+	      area2: _t('units.' + unit2, {
+	        quantity: d2.toLocaleString(locale, {
+	          maximumSignificantDigits: 2
+	        })
+	      })
+	    });
+	  } else {
+	    return area;
+	  }
+	}
 
-	        var dotp = geoVecNormalizedDot(a, b, origin);
-	        var mag = Math.abs(dotp);
-	        if (mag > lowerBound && mag < upperBound) {
-	            return false;
-	        }
-	    }
+	function wrap(x, min, max) {
+	  var d = max - min;
+	  return ((x - min) % d + d) % d + min;
+	}
 
-	    return true;
+	function clamp(x, min, max) {
+	  return Math.max(min, Math.min(x, max));
 	}
 
+	function displayCoordinate(deg, pos, neg) {
+	  var locale = _mainLocalizer.localeCode();
+	  var min = (Math.abs(deg) - Math.floor(Math.abs(deg))) * 60;
+	  var sec = (min - Math.floor(min)) * 60;
+	  var displayDegrees = _t('units.arcdegrees', {
+	    quantity: Math.floor(Math.abs(deg)).toLocaleString(locale)
+	  });
+	  var displayCoordinate;
 
-	function selectMenuItem(context, operation) {
-	    return context.container().select('.edit-menu .edit-menu-item-' + operation);
+	  if (Math.floor(sec) > 0) {
+	    displayCoordinate = displayDegrees + _t('units.arcminutes', {
+	      quantity: Math.floor(min).toLocaleString(locale)
+	    }) + _t('units.arcseconds', {
+	      quantity: Math.round(sec).toLocaleString(locale)
+	    });
+	  } else if (Math.floor(min) > 0) {
+	    displayCoordinate = displayDegrees + _t('units.arcminutes', {
+	      quantity: Math.round(min).toLocaleString(locale)
+	    });
+	  } else {
+	    displayCoordinate = _t('units.arcdegrees', {
+	      quantity: Math.round(Math.abs(deg)).toLocaleString(locale)
+	    });
+	  }
+
+	  if (deg === 0) {
+	    return displayCoordinate;
+	  } else {
+	    return _t('units.coordinate', {
+	      coordinate: displayCoordinate,
+	      direction: _t('units.' + (deg > 0 ? pos : neg))
+	    });
+	  }
 	}
+	/**
+	 * Returns given coordinate pair in degree-minute-second format.
+	 *
+	 * @param {Array<Number>} coord longitude and latitude
+	 */
 
 
-	function transitionTime(point1, point2) {
-	    var distance = geoSphericalDistance(point1, point2);
-	    if (distance === 0)
-	        { return 0; }
-	    else if (distance < 80)
-	        { return 500; }
-	    else
-	        { return 1000; }
+	function dmsCoordinatePair(coord) {
+	  return _t('units.coordinate_pair', {
+	    latitude: displayCoordinate(clamp(coord[1], -90, 90), 'north', 'south'),
+	    longitude: displayCoordinate(wrap(coord[0], -180, 180), 'east', 'west')
+	  });
 	}
+	/**
+	 * Returns the given coordinate pair in decimal format.
+	 * note: unlocalized to avoid comma ambiguity - see #4765
+	 *
+	 * @param {Array<Number>} coord longitude and latitude
+	 */
 
-	// Tooltips and svg mask used to highlight certain features
-	function uiCurtain(containerNode) {
-
-	    var surface = select(null),
-	        tooltip = select(null),
-	        darkness = select(null);
-
-	    function curtain(selection) {
-	        surface = selection
-	            .append('svg')
-	            .attr('class', 'curtain')
-	            .style('top', 0)
-	            .style('left', 0);
+	function decimalCoordinatePair(coord) {
+	  return _t('units.coordinate_pair', {
+	    latitude: clamp(coord[1], -90, 90).toFixed(OSM_PRECISION),
+	    longitude: wrap(coord[0], -180, 180).toFixed(OSM_PRECISION)
+	  });
+	}
 
-	        darkness = surface.append('path')
-	            .attr('x', 0)
-	            .attr('y', 0)
-	            .attr('class', 'curtain-darkness');
+	function uiPanelLocation(context) {
+	  var currLocation = '';
 
-	        select(window).on('resize.curtain', resize);
+	  function redraw(selection) {
+	    selection.html('');
+	    var list = selection.append('ul'); // Mouse coordinates
 
-	        tooltip = selection.append('div')
-	            .attr('class', 'tooltip');
+	    var coord = context.map().mouseCoordinates();
 
-	        tooltip
-	            .append('div')
-	            .attr('class', 'popover-arrow');
+	    if (coord.some(isNaN)) {
+	      coord = context.map().center();
+	    }
 
-	        tooltip
-	            .append('div')
-	            .attr('class', 'popover-inner');
+	    list.append('li').html(dmsCoordinatePair(coord)).append('li').html(decimalCoordinatePair(coord)); // Location Info
 
-	        resize();
+	    selection.append('div').attr('class', 'location-info').html(currLocation || ' ');
+	    debouncedGetLocation(selection, coord);
+	  }
 
+	  var debouncedGetLocation = debounce(getLocation, 250);
 
-	        function resize() {
-	            surface
-	                .attr('width', containerNode.clientWidth)
-	                .attr('height', containerNode.clientHeight);
-	            curtain.cut(darkness.datum());
-	        }
+	  function getLocation(selection, coord) {
+	    if (!services.geocoder) {
+	      currLocation = _t('info_panels.location.unknown_location');
+	      selection.selectAll('.location-info').html(currLocation);
+	    } else {
+	      services.geocoder.reverse(coord, function (err, result) {
+	        currLocation = result ? result.display_name : _t('info_panels.location.unknown_location');
+	        selection.selectAll('.location-info').html(currLocation);
+	      });
 	    }
+	  }
 
+	  var panel = function panel(selection) {
+	    selection.call(redraw);
+	    context.surface().on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'move.info-location', function () {
+	      selection.call(redraw);
+	    });
+	  };
 
-	    /**
-	     * Reveal cuts the curtain to highlight the given box,
-	     * and shows a tooltip with instructions next to the box.
-	     *
-	     * @param  {String|ClientRect} [box]   box used to cut the curtain
-	     * @param  {String}    [text]          text for a tooltip
-	     * @param  {Object}    [options]
-	     * @param  {string}    [options.tooltipClass]    optional class to add to the tooltip
-	     * @param  {integer}   [options.duration]        transition time in milliseconds
-	     * @param  {string}    [options.buttonText]      if set, create a button with this text label
-	     * @param  {function}  [options.buttonCallback]  if set, the callback for the button
-	     * @param  {function}  [options.padding]         extra margin in px to put around bbox
-	     * @param  {String|ClientRect} [options.tooltipBox]  box for tooltip position, if different from box for the curtain
-	     */
-	    curtain.reveal = function(box, text, options) {
-	        options = options || {};
-
-	        if (typeof box === 'string') {
-	            box = select(box).node();
-	        }
-	        if (box && box.getBoundingClientRect) {
-	            box = copyBox(box.getBoundingClientRect());
-	            var containerRect = containerNode.getBoundingClientRect();
-	            box.top -= containerRect.top;
-	            box.left -= containerRect.left;
-	        }
-	        if (box && options.padding) {
-	            box.top -= options.padding;
-	            box.left -= options.padding;
-	            box.bottom += options.padding;
-	            box.right += options.padding;
-	            box.height += options.padding * 2;
-	            box.width += options.padding * 2;
-	        }
-
-	        var tooltipBox;
-	        if (options.tooltipBox) {
-	            tooltipBox = options.tooltipBox;
-	            if (typeof tooltipBox === 'string') {
-	                tooltipBox = select(tooltipBox).node();
-	            }
-	            if (tooltipBox && tooltipBox.getBoundingClientRect) {
-	                tooltipBox = copyBox(tooltipBox.getBoundingClientRect());
-	            }
-	        } else {
-	            tooltipBox = box;
-	        }
-
-	        if (tooltipBox && text) {
-	            // pseudo markdown bold text for the instruction section..
-	            var parts = text.split('**');
-	            var html = parts[0] ? '<span>' + parts[0] + '</span>' : '';
-	            if (parts[1]) {
-	                html += '<span class="instruction">' + parts[1] + '</span>';
-	            }
+	  panel.off = function () {
+	    context.surface().on('.info-location', null);
+	  };
 
-	            html = html.replace(/\*(.*?)\*/g, '<em>$1</em>');   // emphasis
-	            html = html.replace(/\{br\}/g, '<br/><br/>');       // linebreak
+	  panel.id = 'location';
+	  panel.label = _t.html('info_panels.location.title');
+	  panel.key = _t('info_panels.location.key');
+	  return panel;
+	}
 
-	            if (options.buttonText && options.buttonCallback) {
-	                html += '<div class="button-section">' +
-	                    '<button href="#" class="button action">' + options.buttonText + '</button></div>';
-	            }
+	function uiPanelMeasurement(context) {
+	  function radiansToMeters(r) {
+	    // using WGS84 authalic radius (6371007.1809 m)
+	    return r * 6371007.1809;
+	  }
 
-	            var classes = 'curtain-tooltip popover tooltip arrowed in ' + (options.tooltipClass || '');
-	            tooltip
-	                .classed(classes, true)
-	                .selectAll('.popover-inner')
-	                .html(html);
-
-	            if (options.buttonText && options.buttonCallback) {
-	                var button = tooltip.selectAll('.button-section .button.action');
-	                button
-	                    .on('click', function() {
-	                        event.preventDefault();
-	                        options.buttonCallback();
-	                    });
-	            }
+	  function steradiansToSqmeters(r) {
+	    // http://gis.stackexchange.com/a/124857/40446
+	    return r / (4 * Math.PI) * 510065621724000;
+	  }
 
-	            var tip = copyBox(tooltip.node().getBoundingClientRect()),
-	                w = containerNode.clientWidth,
-	                h = containerNode.clientHeight,
-	                tooltipWidth = 200,
-	                tooltipArrow = 5,
-	                side, pos;
+	  function toLineString(feature) {
+	    if (feature.type === 'LineString') return feature;
+	    var result = {
+	      type: 'LineString',
+	      coordinates: []
+	    };
 
+	    if (feature.type === 'Polygon') {
+	      result.coordinates = feature.coordinates[0];
+	    } else if (feature.type === 'MultiPolygon') {
+	      result.coordinates = feature.coordinates[0][0];
+	    }
 
-	            // hack: this will have bottom placement,
-	            // so need to reserve extra space for the tooltip illustration.
-	            if (options.tooltipClass === 'intro-mouse') {
-	                tip.height += 80;
-	            }
+	    return result;
+	  }
 
-	            // trim box dimensions to just the portion that fits in the container..
-	            if (tooltipBox.top + tooltipBox.height > h) {
-	                tooltipBox.height -= (tooltipBox.top + tooltipBox.height - h);
-	            }
-	            if (tooltipBox.left + tooltipBox.width > w) {
-	                tooltipBox.width -= (tooltipBox.left + tooltipBox.width - w);
-	            }
+	  var _isImperial = !_mainLocalizer.usesMetric();
 
-	            // determine tooltip placement..
+	  function redraw(selection) {
+	    var graph = context.graph();
+	    var selectedNoteID = context.selectedNoteID();
+	    var osm = services.osm;
+	    var localeCode = _mainLocalizer.localeCode();
+	    var heading;
+	    var center, location, centroid;
+	    var closed, geometry;
+	    var totalNodeCount,
+	        length = 0,
+	        area = 0,
+	        distance;
+
+	    if (selectedNoteID && osm) {
+	      // selected 1 note
+	      var note = osm.getNote(selectedNoteID);
+	      heading = _t('note.note') + ' ' + selectedNoteID;
+	      location = note.loc;
+	      geometry = 'note';
+	    } else {
+	      // selected 1..n entities
+	      var selectedIDs = context.selectedIDs().filter(function (id) {
+	        return context.hasEntity(id);
+	      });
+	      var selected = selectedIDs.map(function (id) {
+	        return context.entity(id);
+	      });
+	      heading = selected.length === 1 ? selected[0].id : _t('info_panels.selected', {
+	        n: selected.length
+	      });
 
-	            if (tooltipBox.top + tooltipBox.height < 100) {
-	                // tooltip below box..
-	                side = 'bottom';
-	                pos = [
-	                    tooltipBox.left + tooltipBox.width / 2 - tip.width / 2,
-	                    tooltipBox.top + tooltipBox.height
-	                ];
+	      if (selected.length) {
+	        var extent = geoExtent();
 
-	            } else if (tooltipBox.top > h - 140) {
-	                // tooltip above box..
-	                side = 'top';
-	                pos = [
-	                    tooltipBox.left + tooltipBox.width / 2 - tip.width / 2,
-	                    tooltipBox.top - tip.height
-	                ];
+	        for (var i in selected) {
+	          var entity = selected[i];
 
-	            } else {
-	                // tooltip to the side of the tooltipBox..
-	                var tipY = tooltipBox.top + tooltipBox.height / 2 - tip.height / 2;
+	          extent._extend(entity.extent(graph));
 
-	                if (_mainLocalizer.textDirection() === 'rtl') {
-	                    if (tooltipBox.left - tooltipWidth - tooltipArrow < 70) {
-	                        side = 'right';
-	                        pos = [tooltipBox.left + tooltipBox.width + tooltipArrow, tipY];
+	          geometry = entity.geometry(graph);
 
-	                    } else {
-	                        side = 'left';
-	                        pos = [tooltipBox.left - tooltipWidth - tooltipArrow, tipY];
-	                    }
+	          if (geometry === 'line' || geometry === 'area') {
+	            closed = entity.type === 'relation' || entity.isClosed() && !entity.isDegenerate();
+	            var feature = entity.asGeoJSON(graph);
+	            length += radiansToMeters(d3_geoLength(toLineString(feature)));
+	            centroid = d3_geoPath(context.projection).centroid(entity.asGeoJSON(graph));
+	            centroid = centroid && context.projection.invert(centroid);
 
-	                } else {
-	                    if (tooltipBox.left + tooltipBox.width + tooltipArrow + tooltipWidth > w - 70) {
-	                        side = 'left';
-	                        pos = [tooltipBox.left - tooltipWidth - tooltipArrow, tipY];
-	                    }
-	                    else {
-	                        side = 'right';
-	                        pos = [tooltipBox.left + tooltipBox.width + tooltipArrow, tipY];
-	                    }
-	                }
+	            if (!centroid || !isFinite(centroid[0]) || !isFinite(centroid[1])) {
+	              centroid = entity.extent(graph).center();
 	            }
 
-	            if (options.duration !== 0 || !tooltip.classed(side)) {
-	                tooltip.call(uiToggle(true));
+	            if (closed) {
+	              area += steradiansToSqmeters(entity.area(graph));
 	            }
+	          }
+	        }
 
-	            tooltip
-	                .style('top', pos[1] + 'px')
-	                .style('left', pos[0] + 'px')
-	                .attr('class', classes + ' ' + side);
-
+	        if (selected.length > 1) {
+	          geometry = null;
+	          closed = null;
+	          centroid = null;
+	        }
 
-	            // shift popover-inner if it is very close to the top or bottom edge
-	            // (doesn't affect the placement of the popover-arrow)
-	            var shiftY = 0;
-	            if (side === 'left' || side === 'right') {
-	                if (pos[1] < 60) {
-	                    shiftY = 60 - pos[1];
-	                }
-	                else if (pos[1] + tip.height > h - 100) {
-	                    shiftY = h - pos[1] - tip.height - 100;
-	                }
-	            }
-	            tooltip.selectAll('.popover-inner')
-	                .style('top', shiftY + 'px');
+	        if (selected.length === 2 && selected[0].type === 'node' && selected[1].type === 'node') {
+	          distance = geoSphericalDistance(selected[0].loc, selected[1].loc);
+	        }
 
+	        if (selected.length === 1 && selected[0].type === 'node') {
+	          location = selected[0].loc;
 	        } else {
-	            tooltip
-	                .classed('in', false)
-	                .call(uiToggle(false));
+	          totalNodeCount = utilGetAllNodes(selectedIDs, context.graph()).length;
 	        }
 
-	        curtain.cut(box, options.duration);
-
-	        return tooltip;
-	    };
+	        if (!location && !centroid) {
+	          center = extent.center();
+	        }
+	      }
+	    }
 
+	    selection.html('');
 
-	    curtain.cut = function(datum, duration) {
-	        darkness.datum(datum)
-	            .interrupt();
+	    if (heading) {
+	      selection.append('h4').attr('class', 'measurement-heading').html(heading);
+	    }
 
-	        var selection;
-	        if (duration === 0) {
-	            selection = darkness;
-	        } else {
-	            selection = darkness
-	                .transition()
-	                .duration(duration || 600)
-	                .ease(linear$1);
-	        }
-
-	        selection
-	            .attr('d', function(d) {
-	                var containerWidth = containerNode.clientWidth;
-	                var containerHeight = containerNode.clientHeight;
-	                var string = 'M 0,0 L 0,' + containerHeight + ' L ' +
-	                    containerWidth + ',' + containerHeight + 'L' +
-	                    containerWidth + ',0 Z';
-
-	                if (!d) { return string; }
-	                return string + 'M' +
-	                    d.left + ',' + d.top + 'L' +
-	                    d.left + ',' + (d.top + d.height) + 'L' +
-	                    (d.left + d.width) + ',' + (d.top + d.height) + 'L' +
-	                    (d.left + d.width) + ',' + (d.top) + 'Z';
+	    var list = selection.append('ul');
+	    var coordItem;
 
-	            });
-	    };
+	    if (geometry) {
+	      list.append('li').html(_t.html('info_panels.measurement.geometry') + ':').append('span').html(closed ? _t('info_panels.measurement.closed_' + geometry) : _t('geometry.' + geometry));
+	    }
 
+	    if (totalNodeCount) {
+	      list.append('li').html(_t.html('info_panels.measurement.node_count') + ':').append('span').html(totalNodeCount.toLocaleString(localeCode));
+	    }
 
-	    curtain.remove = function() {
-	        surface.remove();
-	        tooltip.remove();
-	        select(window).on('resize.curtain', null);
-	    };
+	    if (area) {
+	      list.append('li').html(_t.html('info_panels.measurement.area') + ':').append('span').html(displayArea(area, _isImperial));
+	    }
 
+	    if (length) {
+	      list.append('li').html(_t.html('info_panels.measurement.' + (closed ? 'perimeter' : 'length')) + ':').append('span').html(displayLength(length, _isImperial));
+	    }
 
-	    // ClientRects are immutable, so copy them to an object,
-	    // in case we need to trim the height/width.
-	    function copyBox(src) {
-	        return {
-	            top: src.top,
-	            right: src.right,
-	            bottom: src.bottom,
-	            left: src.left,
-	            width: src.width,
-	            height: src.height
-	        };
+	    if (typeof distance === 'number') {
+	      list.append('li').html(_t.html('info_panels.measurement.distance') + ':').append('span').html(displayLength(distance, _isImperial));
 	    }
 
+	    if (location) {
+	      coordItem = list.append('li').html(_t.html('info_panels.measurement.location') + ':');
+	      coordItem.append('span').html(dmsCoordinatePair(location));
+	      coordItem.append('span').html(decimalCoordinatePair(location));
+	    }
 
-	    return curtain;
-	}
+	    if (centroid) {
+	      coordItem = list.append('li').html(_t.html('info_panels.measurement.centroid') + ':');
+	      coordItem.append('span').html(dmsCoordinatePair(centroid));
+	      coordItem.append('span').html(decimalCoordinatePair(centroid));
+	    }
 
-	function uiIntroWelcome(context, reveal) {
-	    var dispatch$1 = dispatch('done');
+	    if (center) {
+	      coordItem = list.append('li').html(_t.html('info_panels.measurement.center') + ':');
+	      coordItem.append('span').html(dmsCoordinatePair(center));
+	      coordItem.append('span').html(decimalCoordinatePair(center));
+	    }
 
-	    var chapter = {
-	        title: 'intro.welcome.title'
-	    };
+	    if (length || area || typeof distance === 'number') {
+	      var toggle = _isImperial ? 'imperial' : 'metric';
+	      selection.append('a').html(_t.html('info_panels.measurement.' + toggle)).attr('href', '#').attr('class', 'button button-toggle-units').on('click', function (d3_event) {
+	        d3_event.preventDefault();
+	        _isImperial = !_isImperial;
+	        selection.call(redraw);
+	      });
+	    }
+	  }
 
+	  var panel = function panel(selection) {
+	    selection.call(redraw);
+	    context.map().on('drawn.info-measurement', function () {
+	      selection.call(redraw);
+	    });
+	    context.on('enter.info-measurement', function () {
+	      selection.call(redraw);
+	    });
+	  };
 
-	    function welcome() {
-	        context.map().centerZoom([-85.63591, 41.94285], 19);
-	        reveal('.intro-nav-wrap .chapter-welcome',
-	            helpString('intro.welcome.welcome'),
-	            { buttonText: _t('intro.ok'), buttonCallback: practice }
-	        );
-	    }
+	  panel.off = function () {
+	    context.map().on('drawn.info-measurement', null);
+	    context.on('enter.info-measurement', null);
+	  };
 
-	    function practice() {
-	        reveal('.intro-nav-wrap .chapter-welcome',
-	            helpString('intro.welcome.practice'),
-	            { buttonText: _t('intro.ok'), buttonCallback: words }
-	        );
-	    }
+	  panel.id = 'measurement';
+	  panel.label = _t.html('info_panels.measurement.title');
+	  panel.key = _t('info_panels.measurement.key');
+	  return panel;
+	}
 
-	    function words() {
-	        reveal('.intro-nav-wrap .chapter-welcome',
-	            helpString('intro.welcome.words'),
-	            { buttonText: _t('intro.ok'), buttonCallback: chapters }
-	        );
-	    }
+	var uiInfoPanels = {
+	  background: uiPanelBackground,
+	  history: uiPanelHistory,
+	  location: uiPanelLocation,
+	  measurement: uiPanelMeasurement
+	};
 
+	function uiInfo(context) {
+	  var ids = Object.keys(uiInfoPanels);
+	  var wasActive = ['measurement'];
+	  var panels = {};
+	  var active = {}; // create panels
 
-	    function chapters() {
-	        dispatch$1.call('done');
-	        reveal('.intro-nav-wrap .chapter-navigation',
-	            helpString('intro.welcome.chapters', { next: _t('intro.navigation.title') })
-	        );
+	  ids.forEach(function (k) {
+	    if (!panels[k]) {
+	      panels[k] = uiInfoPanels[k](context);
+	      active[k] = false;
 	    }
+	  });
 
+	  function info(selection) {
+	    function redraw() {
+	      var activeids = ids.filter(function (k) {
+	        return active[k];
+	      }).sort();
+	      var containers = infoPanels.selectAll('.panel-container').data(activeids, function (k) {
+	        return k;
+	      });
+	      containers.exit().style('opacity', 1).transition().duration(200).style('opacity', 0).on('end', function (d) {
+	        select(this).call(panels[d].off).remove();
+	      });
+	      var enter = containers.enter().append('div').attr('class', function (d) {
+	        return 'fillD2 panel-container panel-container-' + d;
+	      });
+	      enter.style('opacity', 0).transition().duration(200).style('opacity', 1);
+	      var title = enter.append('div').attr('class', 'panel-title fillD2');
+	      title.append('h3').html(function (d) {
+	        return panels[d].label;
+	      });
+	      title.append('button').attr('class', 'close').on('click', function (d3_event, d) {
+	        d3_event.stopImmediatePropagation();
+	        d3_event.preventDefault();
+	        info.toggle(d);
+	      }).call(svgIcon('#iD-icon-close'));
+	      enter.append('div').attr('class', function (d) {
+	        return 'panel-content panel-content-' + d;
+	      }); // redraw the panels
+
+	      infoPanels.selectAll('.panel-content').each(function (d) {
+	        select(this).call(panels[d]);
+	      });
+	    }
 
-	    chapter.enter = function() {
-	        welcome();
-	    };
+	    info.toggle = function (which) {
+	      var activeids = ids.filter(function (k) {
+	        return active[k];
+	      });
 
+	      if (which) {
+	        // toggle one
+	        active[which] = !active[which];
 
-	    chapter.exit = function() {
-	        context.container().select('.curtain-tooltip.intro-mouse')
-	            .selectAll('.counter')
-	            .remove();
-	    };
+	        if (activeids.length === 1 && activeids[0] === which) {
+	          // none active anymore
+	          wasActive = [which];
+	        }
 
+	        context.container().select('.' + which + '-panel-toggle-item').classed('active', active[which]).select('input').property('checked', active[which]);
+	      } else {
+	        // toggle all
+	        if (activeids.length) {
+	          wasActive = activeids;
+	          activeids.forEach(function (k) {
+	            active[k] = false;
+	          });
+	        } else {
+	          wasActive.forEach(function (k) {
+	            active[k] = true;
+	          });
+	        }
+	      }
 
-	    chapter.restart = function() {
-	        chapter.exit();
-	        chapter.enter();
+	      redraw();
 	    };
 
+	    var infoPanels = selection.selectAll('.info-panels').data([0]);
+	    infoPanels = infoPanels.enter().append('div').attr('class', 'info-panels').merge(infoPanels);
+	    redraw();
+	    context.keybinding().on(uiCmd('⌘' + _t('info_panels.key')), function (d3_event) {
+	      d3_event.stopImmediatePropagation();
+	      d3_event.preventDefault();
+	      info.toggle();
+	    });
+	    ids.forEach(function (k) {
+	      var key = _t('info_panels.' + k + '.key', {
+	        "default": null
+	      });
+	      if (!key) return;
+	      context.keybinding().on(uiCmd('⌘⇧' + key), function (d3_event) {
+	        d3_event.stopImmediatePropagation();
+	        d3_event.preventDefault();
+	        info.toggle(k);
+	      });
+	    });
+	  }
+
+	  return info;
+	}
 
-	    return utilRebind(chapter, dispatch$1, 'on');
+	function pointBox(loc, context) {
+	  var rect = context.surfaceRect();
+	  var point = context.curtainProjection(loc);
+	  return {
+	    left: point[0] + rect.left - 40,
+	    top: point[1] + rect.top - 60,
+	    width: 80,
+	    height: 90
+	  };
 	}
+	function pad(locOrBox, padding, context) {
+	  var box;
 
-	function uiIntroNavigation(context, reveal) {
-	    var dispatch$1 = dispatch('done');
-	    var timeouts = [];
-	    var hallId = 'n2061';
-	    var townHall = [-85.63591, 41.94285];
-	    var springStreetId = 'w397';
-	    var springStreetEndId = 'n1834';
-	    var springStreet = [-85.63582, 41.94255];
-	    var onewayField = _mainPresetIndex.field('oneway');
-	    var maxspeedField = _mainPresetIndex.field('maxspeed');
-
-
-	    var chapter = {
-	        title: 'intro.navigation.title'
+	  if (locOrBox instanceof Array) {
+	    var rect = context.surfaceRect();
+	    var point = context.curtainProjection(locOrBox);
+	    box = {
+	      left: point[0] + rect.left,
+	      top: point[1] + rect.top
 	    };
+	  } else {
+	    box = locOrBox;
+	  }
+
+	  return {
+	    left: box.left - padding,
+	    top: box.top - padding,
+	    width: (box.width || 0) + 2 * padding,
+	    height: (box.width || 0) + 2 * padding
+	  };
+	}
+	function icon(name, svgklass, useklass) {
+	  return '<svg class="icon ' + (svgklass || '') + '">' + '<use xlink:href="' + name + '"' + (useklass ? ' class="' + useklass + '"' : '') + '></use></svg>';
+	}
+	var helpStringReplacements; // Returns the localized HTML element for `id` with a standardized set of icon, key, and
+	// label replacements suitable for tutorials and documentation. Optionally supplemented
+	// with custom `replacements`
 
+	function helpHtml(id, replacements) {
+	  // only load these the first time
+	  if (!helpStringReplacements) {
+	    helpStringReplacements = {
+	      // insert icons corresponding to various UI elements
+	      point_icon: icon('#iD-icon-point', 'inline'),
+	      line_icon: icon('#iD-icon-line', 'inline'),
+	      area_icon: icon('#iD-icon-area', 'inline'),
+	      note_icon: icon('#iD-icon-note', 'inline add-note'),
+	      plus: icon('#iD-icon-plus', 'inline'),
+	      minus: icon('#iD-icon-minus', 'inline'),
+	      layers_icon: icon('#iD-icon-layers', 'inline'),
+	      data_icon: icon('#iD-icon-data', 'inline'),
+	      inspect: icon('#iD-icon-inspect', 'inline'),
+	      help_icon: icon('#iD-icon-help', 'inline'),
+	      undo_icon: icon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-redo' : '#iD-icon-undo', 'inline'),
+	      redo_icon: icon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-undo' : '#iD-icon-redo', 'inline'),
+	      save_icon: icon('#iD-icon-save', 'inline'),
+	      // operation icons
+	      circularize_icon: icon('#iD-operation-circularize', 'inline operation'),
+	      continue_icon: icon('#iD-operation-continue', 'inline operation'),
+	      copy_icon: icon('#iD-operation-copy', 'inline operation'),
+	      delete_icon: icon('#iD-operation-delete', 'inline operation'),
+	      disconnect_icon: icon('#iD-operation-disconnect', 'inline operation'),
+	      downgrade_icon: icon('#iD-operation-downgrade', 'inline operation'),
+	      extract_icon: icon('#iD-operation-extract', 'inline operation'),
+	      merge_icon: icon('#iD-operation-merge', 'inline operation'),
+	      move_icon: icon('#iD-operation-move', 'inline operation'),
+	      orthogonalize_icon: icon('#iD-operation-orthogonalize', 'inline operation'),
+	      paste_icon: icon('#iD-operation-paste', 'inline operation'),
+	      reflect_long_icon: icon('#iD-operation-reflect-long', 'inline operation'),
+	      reflect_short_icon: icon('#iD-operation-reflect-short', 'inline operation'),
+	      reverse_icon: icon('#iD-operation-reverse', 'inline operation'),
+	      rotate_icon: icon('#iD-operation-rotate', 'inline operation'),
+	      split_icon: icon('#iD-operation-split', 'inline operation'),
+	      straighten_icon: icon('#iD-operation-straighten', 'inline operation'),
+	      // interaction icons
+	      leftclick: icon('#iD-walkthrough-mouse-left', 'inline operation'),
+	      rightclick: icon('#iD-walkthrough-mouse-right', 'inline operation'),
+	      mousewheel_icon: icon('#iD-walkthrough-mousewheel', 'inline operation'),
+	      tap_icon: icon('#iD-walkthrough-tap', 'inline operation'),
+	      doubletap_icon: icon('#iD-walkthrough-doubletap', 'inline operation'),
+	      longpress_icon: icon('#iD-walkthrough-longpress', 'inline operation'),
+	      touchdrag_icon: icon('#iD-walkthrough-touchdrag', 'inline operation'),
+	      pinch_icon: icon('#iD-walkthrough-pinch-apart', 'inline operation'),
+	      // insert keys; may be localized and platform-dependent
+	      shift: uiCmd.display('⇧'),
+	      alt: uiCmd.display('⌥'),
+	      "return": uiCmd.display('↵'),
+	      esc: _t.html('shortcuts.key.esc'),
+	      space: _t.html('shortcuts.key.space'),
+	      add_note_key: _t.html('modes.add_note.key'),
+	      help_key: _t.html('help.key'),
+	      shortcuts_key: _t.html('shortcuts.toggle.key'),
+	      // reference localized UI labels directly so that they'll always match
+	      save: _t.html('save.title'),
+	      undo: _t.html('undo.title'),
+	      redo: _t.html('redo.title'),
+	      upload: _t.html('commit.save'),
+	      point: _t.html('modes.add_point.title'),
+	      line: _t.html('modes.add_line.title'),
+	      area: _t.html('modes.add_area.title'),
+	      note: _t.html('modes.add_note.label'),
+	      circularize: _t.html('operations.circularize.title'),
+	      "continue": _t.html('operations.continue.title'),
+	      copy: _t.html('operations.copy.title'),
+	      "delete": _t.html('operations.delete.title'),
+	      disconnect: _t.html('operations.disconnect.title'),
+	      downgrade: _t.html('operations.downgrade.title'),
+	      extract: _t.html('operations.extract.title'),
+	      merge: _t.html('operations.merge.title'),
+	      move: _t.html('operations.move.title'),
+	      orthogonalize: _t.html('operations.orthogonalize.title'),
+	      paste: _t.html('operations.paste.title'),
+	      reflect_long: _t.html('operations.reflect.title.long'),
+	      reflect_short: _t.html('operations.reflect.title.short'),
+	      reverse: _t.html('operations.reverse.title'),
+	      rotate: _t.html('operations.rotate.title'),
+	      split: _t.html('operations.split.title'),
+	      straighten: _t.html('operations.straighten.title'),
+	      map_data: _t.html('map_data.title'),
+	      osm_notes: _t.html('map_data.layers.notes.title'),
+	      fields: _t.html('inspector.fields'),
+	      tags: _t.html('inspector.tags'),
+	      relations: _t.html('inspector.relations'),
+	      new_relation: _t.html('inspector.new_relation'),
+	      turn_restrictions: _t.html('_tagging.presets.fields.restrictions.label'),
+	      background_settings: _t.html('background.description'),
+	      imagery_offset: _t.html('background.fix_misalignment'),
+	      start_the_walkthrough: _t.html('splash.walkthrough'),
+	      help: _t.html('help.title'),
+	      ok: _t.html('intro.ok')
+	    };
+	  }
+
+	  var reps;
+
+	  if (replacements) {
+	    reps = Object.assign(replacements, helpStringReplacements);
+	  } else {
+	    reps = helpStringReplacements;
+	  }
 
-	    function timeout(f, t) {
-	        timeouts.push(window.setTimeout(f, t));
-	    }
+	  return _t.html(id, reps) // use keyboard key styling for shortcuts
+	  .replace(/\`(.*?)\`/g, '<kbd>$1</kbd>');
+	}
 
+	function slugify(text) {
+	  return text.toString().toLowerCase().replace(/\s+/g, '-') // Replace spaces with -
+	  .replace(/[^\w\-]+/g, '') // Remove all non-word chars
+	  .replace(/\-\-+/g, '-') // Replace multiple - with single -
+	  .replace(/^-+/, '') // Trim - from start of text
+	  .replace(/-+$/, ''); // Trim - from end of text
+	} // console warning for missing walkthrough names
 
-	    function eventCancel() {
-	        event.stopPropagation();
-	        event.preventDefault();
-	    }
 
+	var missingStrings = {};
 
-	    function isTownHallSelected() {
-	        var ids = context.selectedIDs();
-	        return ids.length === 1 && ids[0] === hallId;
-	    }
+	function checkKey(key, text) {
+	  if (_t(key, {
+	    "default": undefined
+	  }) === undefined) {
+	    if (missingStrings.hasOwnProperty(key)) return; // warn once
 
+	    missingStrings[key] = text;
+	    var missing = key + ': ' + text;
+	    if (typeof console !== 'undefined') console.log(missing); // eslint-disable-line
+	  }
+	}
 
-	    function dragMap() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');
+	function localize(obj) {
+	  var key; // Assign name if entity has one..
 
-	        var msec = transitionTime(townHall, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(townHall, 19, msec);
+	  var name = obj.tags && obj.tags.name;
 
-	        timeout(function() {
-	            var centerStart = context.map().center();
+	  if (name) {
+	    key = 'intro.graph.name.' + slugify(name);
+	    obj.tags.name = _t(key, {
+	      "default": name
+	    });
+	    checkKey(key, name);
+	  } // Assign street name if entity has one..
 
-	            var textId = context.lastPointerType() === 'mouse' ? 'drag' : 'drag_touch';
-	            var dragString = helpString('intro.navigation.map_info') + '{br}' + helpString('intro.navigation.' + textId);
-	            reveal('.surface', dragString);
-	            context.map().on('drawn.intro', function() {
-	                reveal('.surface', dragString, { duration: 0 });
-	            });
 
-	            context.map().on('move.intro', function() {
-	                var centerNow = context.map().center();
-	                if (centerStart[0] !== centerNow[0] || centerStart[1] !== centerNow[1]) {
-	                    context.map().on('move.intro', null);
-	                    timeout(function() { continueTo(zoomMap); }, 3000);
-	                }
-	            });
+	  var street = obj.tags && obj.tags['addr:street'];
 
-	        }, msec + 100);
+	  if (street) {
+	    key = 'intro.graph.name.' + slugify(street);
+	    obj.tags['addr:street'] = _t(key, {
+	      "default": street
+	    });
+	    checkKey(key, street); // Add address details common across walkthrough..
+
+	    var addrTags = ['block_number', 'city', 'county', 'district', 'hamlet', 'neighbourhood', 'postcode', 'province', 'quarter', 'state', 'subdistrict', 'suburb'];
+	    addrTags.forEach(function (k) {
+	      var key = 'intro.graph.' + k;
+	      var tag = 'addr:' + k;
+	      var val = obj.tags && obj.tags[tag];
+	      var str = _t(key, {
+	        "default": val
+	      });
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
+	      if (str) {
+	        if (str.match(/^<.*>$/) !== null) {
+	          delete obj.tags[tag];
+	        } else {
+	          obj.tags[tag] = str;
 	        }
-	    }
-
+	      }
+	    });
+	  }
 
-	    function zoomMap() {
-	        var zoomStart = context.map().zoom();
+	  return obj;
+	} // Used to detect squareness.. some duplicataion of code from actionOrthogonalize.
 
-	        var textId = context.lastPointerType() === 'mouse' ? 'zoom' : 'zoom_touch';
-	        var zoomString = helpString('intro.navigation.' + textId);
+	function isMostlySquare(points) {
+	  // note: uses 15 here instead of the 12 from actionOrthogonalize because
+	  // actionOrthogonalize can actually straighten some larger angles as it iterates
+	  var threshold = 15; // degrees within right or straight
 
-	        reveal('.surface', zoomString);
+	  var lowerBound = Math.cos((90 - threshold) * Math.PI / 180); // near right
 
-	        context.map().on('drawn.intro', function() {
-	            reveal('.surface', zoomString, { duration: 0 });
-	        });
+	  var upperBound = Math.cos(threshold * Math.PI / 180); // near straight
 
-	        context.map().on('move.intro', function() {
-	            if (context.map().zoom() !== zoomStart) {
-	                context.map().on('move.intro', null);
-	                timeout(function() { continueTo(features); }, 3000);
-	            }
-	        });
+	  for (var i = 0; i < points.length; i++) {
+	    var a = points[(i - 1 + points.length) % points.length];
+	    var origin = points[i];
+	    var b = points[(i + 1) % points.length];
+	    var dotp = geoVecNormalizedDot(a, b, origin);
+	    var mag = Math.abs(dotp);
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
-	        }
+	    if (mag > lowerBound && mag < upperBound) {
+	      return false;
 	    }
+	  }
 
+	  return true;
+	}
+	function selectMenuItem(context, operation) {
+	  return context.container().select('.edit-menu .edit-menu-item-' + operation);
+	}
+	function transitionTime(point1, point2) {
+	  var distance = geoSphericalDistance(point1, point2);
 
-	    function features() {
-	        var onClick = function() { continueTo(pointsLinesAreas); };
-
-	        reveal('.surface', helpString('intro.navigation.features'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
-
-	        context.map().on('drawn.intro', function() {
-	            reveal('.surface', helpString('intro.navigation.features'),
-	                { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	            );
-	        });
+	  if (distance === 0) {
+	    return 0;
+	  } else if (distance < 80) {
+	    return 500;
+	  } else {
+	    return 1000;
+	  }
+	}
 
-	        function continueTo(nextStep) {
-	            context.map().on('drawn.intro', null);
-	            nextStep();
-	        }
-	    }
+	// hide class, which sets display=none, and a d3 transition for opacity.
+	// this will cause blinking when called repeatedly, so check that the
+	// value actually changes between calls.
 
-	    function pointsLinesAreas() {
-	        var onClick = function() { continueTo(nodesWays); };
+	function uiToggle(show, callback) {
+	  return function (selection) {
+	    selection.style('opacity', show ? 0 : 1).classed('hide', false).transition().style('opacity', show ? 1 : 0).on('end', function () {
+	      select(this).classed('hide', !show).style('opacity', null);
+	      if (callback) callback.apply(this);
+	    });
+	  };
+	}
 
-	        reveal('.surface', helpString('intro.navigation.points_lines_areas'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	function uiCurtain(containerNode) {
+	  var surface = select(null),
+	      tooltip = select(null),
+	      darkness = select(null);
 
-	        context.map().on('drawn.intro', function() {
-	            reveal('.surface', helpString('intro.navigation.points_lines_areas'),
-	                { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	            );
-	        });
+	  function curtain(selection) {
+	    surface = selection.append('svg').attr('class', 'curtain').style('top', 0).style('left', 0);
+	    darkness = surface.append('path').attr('x', 0).attr('y', 0).attr('class', 'curtain-darkness');
+	    select(window).on('resize.curtain', resize);
+	    tooltip = selection.append('div').attr('class', 'tooltip');
+	    tooltip.append('div').attr('class', 'popover-arrow');
+	    tooltip.append('div').attr('class', 'popover-inner');
+	    resize();
 
-	        function continueTo(nextStep) {
-	            context.map().on('drawn.intro', null);
-	            nextStep();
-	        }
+	    function resize() {
+	      surface.attr('width', containerNode.clientWidth).attr('height', containerNode.clientHeight);
+	      curtain.cut(darkness.datum());
 	    }
+	  }
+	  /**
+	   * Reveal cuts the curtain to highlight the given box,
+	   * and shows a tooltip with instructions next to the box.
+	   *
+	   * @param  {String|ClientRect} [box]   box used to cut the curtain
+	   * @param  {String}    [text]          text for a tooltip
+	   * @param  {Object}    [options]
+	   * @param  {string}    [options.tooltipClass]    optional class to add to the tooltip
+	   * @param  {integer}   [options.duration]        transition time in milliseconds
+	   * @param  {string}    [options.buttonText]      if set, create a button with this text label
+	   * @param  {function}  [options.buttonCallback]  if set, the callback for the button
+	   * @param  {function}  [options.padding]         extra margin in px to put around bbox
+	   * @param  {String|ClientRect} [options.tooltipBox]  box for tooltip position, if different from box for the curtain
+	   */
 
-	    function nodesWays() {
-	        var onClick = function() { continueTo(clickTownHall); };
-
-	        reveal('.surface', helpString('intro.navigation.nodes_ways'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
 
-	        context.map().on('drawn.intro', function() {
-	            reveal('.surface', helpString('intro.navigation.nodes_ways'),
-	                { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	            );
-	        });
+	  curtain.reveal = function (box, html, options) {
+	    options = options || {};
 
-	        function continueTo(nextStep) {
-	            context.map().on('drawn.intro', null);
-	            nextStep();
-	        }
+	    if (typeof box === 'string') {
+	      box = select(box).node();
 	    }
 
-	    function clickTownHall() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');
+	    if (box && box.getBoundingClientRect) {
+	      box = copyBox(box.getBoundingClientRect());
+	      var containerRect = containerNode.getBoundingClientRect();
+	      box.top -= containerRect.top;
+	      box.left -= containerRect.left;
+	    }
 
-	        var entity = context.hasEntity(hallId);
-	        if (!entity) { return; }
-	        reveal(null, null, { duration: 0 });
-	        context.map().centerZoomEase(entity.loc, 19, 500);
-
-	        timeout(function() {
-	            var entity = context.hasEntity(hallId);
-	            if (!entity) { return; }
-	            var box = pointBox(entity.loc, context);
-	            var textId = context.lastPointerType() === 'mouse' ? 'click_townhall' : 'tap_townhall';
-	            reveal(box, helpString('intro.navigation.' + textId));
-
-	            context.map().on('move.intro drawn.intro', function() {
-	                var entity = context.hasEntity(hallId);
-	                if (!entity) { return; }
-	                var box = pointBox(entity.loc, context);
-	                reveal(box, helpString('intro.navigation.' + textId), { duration: 0 });
-	            });
+	    if (box && options.padding) {
+	      box.top -= options.padding;
+	      box.left -= options.padding;
+	      box.bottom += options.padding;
+	      box.right += options.padding;
+	      box.height += options.padding * 2;
+	      box.width += options.padding * 2;
+	    }
 
-	            context.on('enter.intro', function() {
-	                if (isTownHallSelected()) { continueTo(selectedTownHall); }
-	            });
+	    var tooltipBox;
 
-	        }, 550);  // after centerZoomEase
+	    if (options.tooltipBox) {
+	      tooltipBox = options.tooltipBox;
 
-	        context.history().on('change.intro', function() {
-	            if (!context.hasEntity(hallId)) {
-	                continueTo(clickTownHall);
-	            }
-	        });
+	      if (typeof tooltipBox === 'string') {
+	        tooltipBox = select(tooltipBox).node();
+	      }
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	      if (tooltipBox && tooltipBox.getBoundingClientRect) {
+	        tooltipBox = copyBox(tooltipBox.getBoundingClientRect());
+	      }
+	    } else {
+	      tooltipBox = box;
 	    }
 
+	    if (tooltipBox && html) {
+	      if (html.indexOf('**') !== -1) {
+	        if (html.indexOf('<span') === 0) {
+	          html = html.replace(/^(<span.*?>)(.+?)(\*\*)/, '$1<span>$2</span>$3');
+	        } else {
+	          html = html.replace(/^(.+?)(\*\*)/, '<span>$1</span>$2');
+	        } // pseudo markdown bold text for the instruction section..
 
-	    function selectedTownHall() {
-	        if (!isTownHallSelected()) { return clickTownHall(); }
 
-	        var entity = context.hasEntity(hallId);
-	        if (!entity) { return clickTownHall(); }
+	        html = html.replace(/\*\*(.*?)\*\*/g, '<span class="instruction">$1</span>');
+	      }
 
-	        var box = pointBox(entity.loc, context);
-	        var onClick = function() { continueTo(editorTownHall); };
+	      html = html.replace(/\*(.*?)\*/g, '<em>$1</em>'); // emphasis
 
-	        reveal(box, helpString('intro.navigation.selected_townhall'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	      html = html.replace(/\{br\}/g, '<br/><br/>'); // linebreak
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            var entity = context.hasEntity(hallId);
-	            if (!entity) { return; }
-	            var box = pointBox(entity.loc, context);
-	            reveal(box, helpString('intro.navigation.selected_townhall'),
-	                { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	            );
-	        });
+	      if (options.buttonText && options.buttonCallback) {
+	        html += '<div class="button-section">' + '<button href="#" class="button action">' + options.buttonText + '</button></div>';
+	      }
 
-	        context.history().on('change.intro', function() {
-	            if (!context.hasEntity(hallId)) {
-	                continueTo(clickTownHall);
-	            }
-	        });
+	      var classes = 'curtain-tooltip popover tooltip arrowed in ' + (options.tooltipClass || '');
+	      tooltip.classed(classes, true).selectAll('.popover-inner').html(html);
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	      if (options.buttonText && options.buttonCallback) {
+	        var button = tooltip.selectAll('.button-section .button.action');
+	        button.on('click', function (d3_event) {
+	          d3_event.preventDefault();
+	          options.buttonCallback();
+	        });
+	      }
 
+	      var tip = copyBox(tooltip.node().getBoundingClientRect()),
+	          w = containerNode.clientWidth,
+	          h = containerNode.clientHeight,
+	          tooltipWidth = 200,
+	          tooltipArrow = 5,
+	          side,
+	          pos; // hack: this will have bottom placement,
+	      // so need to reserve extra space for the tooltip illustration.
 
-	    function editorTownHall() {
-	        if (!isTownHallSelected()) { return clickTownHall(); }
+	      if (options.tooltipClass === 'intro-mouse') {
+	        tip.height += 80;
+	      } // trim box dimensions to just the portion that fits in the container..
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
 
-	        var onClick = function() { continueTo(presetTownHall); };
+	      if (tooltipBox.top + tooltipBox.height > h) {
+	        tooltipBox.height -= tooltipBox.top + tooltipBox.height - h;
+	      }
 
-	        reveal('.entity-editor-pane',
-	            helpString('intro.navigation.editor_townhall'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	      if (tooltipBox.left + tooltipBox.width > w) {
+	        tooltipBox.width -= tooltipBox.left + tooltipBox.width - w;
+	      } // determine tooltip placement..
 
-	        context.on('exit.intro', function() {
-	            continueTo(clickTownHall);
-	        });
 
-	        context.history().on('change.intro', function() {
-	            if (!context.hasEntity(hallId)) {
-	                continueTo(clickTownHall);
-	            }
-	        });
+	      if (tooltipBox.top + tooltipBox.height < 100) {
+	        // tooltip below box..
+	        side = 'bottom';
+	        pos = [tooltipBox.left + tooltipBox.width / 2 - tip.width / 2, tooltipBox.top + tooltipBox.height];
+	      } else if (tooltipBox.top > h - 140) {
+	        // tooltip above box..
+	        side = 'top';
+	        pos = [tooltipBox.left + tooltipBox.width / 2 - tip.width / 2, tooltipBox.top - tip.height];
+	      } else {
+	        // tooltip to the side of the tooltipBox..
+	        var tipY = tooltipBox.top + tooltipBox.height / 2 - tip.height / 2;
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            nextStep();
+	        if (_mainLocalizer.textDirection() === 'rtl') {
+	          if (tooltipBox.left - tooltipWidth - tooltipArrow < 70) {
+	            side = 'right';
+	            pos = [tooltipBox.left + tooltipBox.width + tooltipArrow, tipY];
+	          } else {
+	            side = 'left';
+	            pos = [tooltipBox.left - tooltipWidth - tooltipArrow, tipY];
+	          }
+	        } else {
+	          if (tooltipBox.left + tooltipBox.width + tooltipArrow + tooltipWidth > w - 70) {
+	            side = 'left';
+	            pos = [tooltipBox.left - tooltipWidth - tooltipArrow, tipY];
+	          } else {
+	            side = 'right';
+	            pos = [tooltipBox.left + tooltipBox.width + tooltipArrow, tipY];
+	          }
 	        }
-	    }
-
+	      }
 
-	    function presetTownHall() {
-	        if (!isTownHallSelected()) { return clickTownHall(); }
+	      if (options.duration !== 0 || !tooltip.classed(side)) {
+	        tooltip.call(uiToggle(true));
+	      }
 
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	      tooltip.style('top', pos[1] + 'px').style('left', pos[0] + 'px').attr('class', classes + ' ' + side); // shift popover-inner if it is very close to the top or bottom edge
+	      // (doesn't affect the placement of the popover-arrow)
 
-	        // preset match, in case the user happened to change it.
-	        var entity = context.entity(context.selectedIDs()[0]);
-	        var preset = _mainPresetIndex.match(entity, context.graph());
+	      var shiftY = 0;
 
-	        var onClick = function() { continueTo(fieldsTownHall); };
+	      if (side === 'left' || side === 'right') {
+	        if (pos[1] < 60) {
+	          shiftY = 60 - pos[1];
+	        } else if (pos[1] + tip.height > h - 100) {
+	          shiftY = h - pos[1] - tip.height - 100;
+	        }
+	      }
 
-	        reveal('.entity-editor-pane .section-feature-type',
-	            helpString('intro.navigation.preset_townhall', { preset: preset.name() }),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	      tooltip.selectAll('.popover-inner').style('top', shiftY + 'px');
+	    } else {
+	      tooltip.classed('in', false).call(uiToggle(false));
+	    }
 
-	        context.on('exit.intro', function() {
-	            continueTo(clickTownHall);
-	        });
+	    curtain.cut(box, options.duration);
+	    return tooltip;
+	  };
 
-	        context.history().on('change.intro', function() {
-	            if (!context.hasEntity(hallId)) {
-	                continueTo(clickTownHall);
-	            }
-	        });
+	  curtain.cut = function (datum, duration) {
+	    darkness.datum(datum).interrupt();
+	    var selection;
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            nextStep();
-	        }
+	    if (duration === 0) {
+	      selection = darkness;
+	    } else {
+	      selection = darkness.transition().duration(duration || 600).ease(linear$1);
 	    }
 
+	    selection.attr('d', function (d) {
+	      var containerWidth = containerNode.clientWidth;
+	      var containerHeight = containerNode.clientHeight;
+	      var string = 'M 0,0 L 0,' + containerHeight + ' L ' + containerWidth + ',' + containerHeight + 'L' + containerWidth + ',0 Z';
+	      if (!d) return string;
+	      return string + 'M' + d.left + ',' + d.top + 'L' + d.left + ',' + (d.top + d.height) + 'L' + (d.left + d.width) + ',' + (d.top + d.height) + 'L' + (d.left + d.width) + ',' + d.top + 'Z';
+	    });
+	  };
 
-	    function fieldsTownHall() {
-	        if (!isTownHallSelected()) { return clickTownHall(); }
-
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	  curtain.remove = function () {
+	    surface.remove();
+	    tooltip.remove();
+	    select(window).on('resize.curtain', null);
+	  }; // ClientRects are immutable, so copy them to an object,
+	  // in case we need to trim the height/width.
 
-	        var onClick = function() { continueTo(closeTownHall); };
 
-	        reveal('.entity-editor-pane .section-preset-fields',
-	            helpString('intro.navigation.fields_townhall'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	  function copyBox(src) {
+	    return {
+	      top: src.top,
+	      right: src.right,
+	      bottom: src.bottom,
+	      left: src.left,
+	      width: src.width,
+	      height: src.height
+	    };
+	  }
 
-	        context.on('exit.intro', function() {
-	            continueTo(clickTownHall);
-	        });
+	  return curtain;
+	}
 
-	        context.history().on('change.intro', function() {
-	            if (!context.hasEntity(hallId)) {
-	                continueTo(clickTownHall);
-	            }
-	        });
+	function uiIntroWelcome(context, reveal) {
+	  var dispatch = dispatch$8('done');
+	  var chapter = {
+	    title: 'intro.welcome.title'
+	  };
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            nextStep();
-	        }
-	    }
+	  function welcome() {
+	    context.map().centerZoom([-85.63591, 41.94285], 19);
+	    reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.welcome'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: practice
+	    });
+	  }
 
+	  function practice() {
+	    reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.practice'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: words
+	    });
+	  }
 
-	    function closeTownHall() {
-	        if (!isTownHallSelected()) { return clickTownHall(); }
+	  function words() {
+	    reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.words'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: chapters
+	    });
+	  }
 
-	        var selector = '.entity-editor-pane button.close svg use';
-	        var href = select(selector).attr('href') || '#iD-icon-close';
+	  function chapters() {
+	    dispatch.call('done');
+	    reveal('.intro-nav-wrap .chapter-navigation', helpHtml('intro.welcome.chapters', {
+	      next: _t('intro.navigation.title')
+	    }));
+	  }
 
-	        reveal('.entity-editor-pane',
-	            helpString('intro.navigation.close_townhall', { button: icon(href, 'pre-text') })
-	        );
+	  chapter.enter = function () {
+	    welcome();
+	  };
 
-	        context.on('exit.intro', function() {
-	            continueTo(searchStreet);
-	        });
+	  chapter.exit = function () {
+	    context.container().select('.curtain-tooltip.intro-mouse').selectAll('.counter').remove();
+	  };
 
-	        context.history().on('change.intro', function() {
-	            // update the close icon in the tooltip if the user edits something.
-	            var selector = '.entity-editor-pane button.close svg use';
-	            var href = select(selector).attr('href') || '#iD-icon-close';
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	            reveal('.entity-editor-pane',
-	                helpString('intro.navigation.close_townhall', { button: icon(href, 'pre-text') }),
-	                { duration: 0 }
-	            );
-	        });
+	  return utilRebind(chapter, dispatch, 'on');
+	}
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	function uiIntroNavigation(context, reveal) {
+	  var dispatch = dispatch$8('done');
+	  var timeouts = [];
+	  var hallId = 'n2061';
+	  var townHall = [-85.63591, 41.94285];
+	  var springStreetId = 'w397';
+	  var springStreetEndId = 'n1834';
+	  var springStreet = [-85.63582, 41.94255];
+	  var onewayField = _mainPresetIndex.field('oneway');
+	  var maxspeedField = _mainPresetIndex.field('maxspeed');
+	  var chapter = {
+	    title: 'intro.navigation.title'
+	  };
 
+	  function timeout(f, t) {
+	    timeouts.push(window.setTimeout(f, t));
+	  }
 
-	    function searchStreet() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');  // ensure spring street exists
+	  function eventCancel(d3_event) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	  }
 
-	        var msec = transitionTime(springStreet, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(springStreet, 19, msec);  // ..and user can see it
+	  function isTownHallSelected() {
+	    var ids = context.selectedIDs();
+	    return ids.length === 1 && ids[0] === hallId;
+	  }
 
-	        timeout(function() {
-	            reveal('.search-header input',
-	                helpString('intro.navigation.search_street', { name: _t('intro.graph.name.spring-street') })
-	            );
+	  function dragMap() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    var msec = transitionTime(townHall, context.map().center());
 
-	            context.container().select('.search-header input')
-	                .on('keyup.intro', checkSearchResult);
-	        }, msec + 100);
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
 	    }
 
+	    context.map().centerZoomEase(townHall, 19, msec);
+	    timeout(function () {
+	      var centerStart = context.map().center();
+	      var textId = context.lastPointerType() === 'mouse' ? 'drag' : 'drag_touch';
+	      var dragString = helpHtml('intro.navigation.map_info') + '{br}' + helpHtml('intro.navigation.' + textId);
+	      reveal('.surface', dragString);
+	      context.map().on('drawn.intro', function () {
+	        reveal('.surface', dragString, {
+	          duration: 0
+	        });
+	      });
+	      context.map().on('move.intro', function () {
+	        var centerNow = context.map().center();
 
-	    function checkSearchResult() {
-	        var first = context.container().select('.feature-list-item:nth-child(0n+2)');  // skip "No Results" item
-	        var firstName = first.select('.entity-name');
-	        var name = _t('intro.graph.name.spring-street');
-
-	        if (!firstName.empty() && firstName.text() === name) {
-	            reveal(first.node(),
-	                helpString('intro.navigation.choose_street', { name: name }),
-	                { duration: 300 }
-	            );
-
-	            context.on('exit.intro', function() {
-	                continueTo(selectedStreet);
-	            });
-
-	            context.container().select('.search-header input')
-	                .on('keydown.intro', eventCancel, true)
-	                .on('keyup.intro', null);
+	        if (centerStart[0] !== centerNow[0] || centerStart[1] !== centerNow[1]) {
+	          context.map().on('move.intro', null);
+	          timeout(function () {
+	            continueTo(zoomMap);
+	          }, 3000);
 	        }
+	      });
+	    }, msec + 100);
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.container().select('.search-header input')
-	                .on('keydown.intro', null)
-	                .on('keyup.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function zoomMap() {
+	    var zoomStart = context.map().zoom();
+	    var textId = context.lastPointerType() === 'mouse' ? 'zoom' : 'zoom_touch';
+	    var zoomString = helpHtml('intro.navigation.' + textId);
+	    reveal('.surface', zoomString);
+	    context.map().on('drawn.intro', function () {
+	      reveal('.surface', zoomString, {
+	        duration: 0
+	      });
+	    });
+	    context.map().on('move.intro', function () {
+	      if (context.map().zoom() !== zoomStart) {
+	        context.map().on('move.intro', null);
+	        timeout(function () {
+	          continueTo(features);
+	        }, 3000);
+	      }
+	    });
 
-	    function selectedStreet() {
-	        if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
-	            return searchStreet();
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        var onClick = function() { continueTo(editorStreet); };
-	        var entity = context.entity(springStreetEndId);
-	        var box = pointBox(entity.loc, context);
-	        box.height = 500;
+	  function features() {
+	    var onClick = function onClick() {
+	      continueTo(pointsLinesAreas);
+	    };
 
-	        reveal(box,
-	            helpString('intro.navigation.selected_street', { name: _t('intro.graph.name.spring-street') }),
-	            { duration: 600, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	    reveal('.surface', helpHtml('intro.navigation.features'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    context.map().on('drawn.intro', function () {
+	      reveal('.surface', helpHtml('intro.navigation.features'), {
+	        duration: 0,
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: onClick
+	      });
+	    });
 
-	        timeout(function() {
-	            context.map().on('move.intro drawn.intro', function() {
-	                var entity = context.hasEntity(springStreetEndId);
-	                if (!entity) { return; }
-	                var box = pointBox(entity.loc, context);
-	                box.height = 500;
-	                reveal(box,
-	                    helpString('intro.navigation.selected_street', { name: _t('intro.graph.name.spring-street') }),
-	                    { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	                );
-	            });
-	        }, 600);  // after reveal.
+	    function continueTo(nextStep) {
+	      context.map().on('drawn.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context.on('enter.intro', function(mode) {
-	            if (!context.hasEntity(springStreetId)) {
-	                return continueTo(searchStreet);
-	            }
-	            var ids = context.selectedIDs();
-	            if (mode.id !== 'select' || !ids.length || ids[0] !== springStreetId) {
-	                // keep Spring Street selected..
-	                context.enter(modeSelect(context, [springStreetId]));
-	            }
-	        });
+	  function pointsLinesAreas() {
+	    var onClick = function onClick() {
+	      continueTo(nodesWays);
+	    };
 
-	        context.history().on('change.intro', function() {
-	            if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
-	                timeout(function() {
-	                    continueTo(searchStreet);
-	                }, 300);  // after any transition (e.g. if user deleted intersection)
-	            }
-	        });
+	    reveal('.surface', helpHtml('intro.navigation.points_lines_areas'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    context.map().on('drawn.intro', function () {
+	      reveal('.surface', helpHtml('intro.navigation.points_lines_areas'), {
+	        duration: 0,
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: onClick
+	      });
+	    });
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('drawn.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function nodesWays() {
+	    var onClick = function onClick() {
+	      continueTo(clickTownHall);
+	    };
 
-	    function editorStreet() {
-	        var selector = '.entity-editor-pane button.close svg use';
-	        var href = select(selector).attr('href') || '#iD-icon-close';
-
-	        reveal('.entity-editor-pane', helpString('intro.navigation.street_different_fields') + '{br}' +
-	            helpString('intro.navigation.editor_street', {
-	                button: icon(href, 'pre-text'),
-	                field1: onewayField.label(),
-	                field2: maxspeedField.label()
-	            }));
+	    reveal('.surface', helpHtml('intro.navigation.nodes_ways'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    context.map().on('drawn.intro', function () {
+	      reveal('.surface', helpHtml('intro.navigation.nodes_ways'), {
+	        duration: 0,
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: onClick
+	      });
+	    });
 
-	        context.on('exit.intro', function() {
-	            continueTo(play);
-	        });
+	    function continueTo(nextStep) {
+	      context.map().on('drawn.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context.history().on('change.intro', function() {
-	            // update the close icon in the tooltip if the user edits something.
-	            var selector = '.entity-editor-pane button.close svg use';
-	            var href = select(selector).attr('href') || '#iD-icon-close';
-
-	            reveal('.entity-editor-pane', helpString('intro.navigation.street_different_fields') + '{br}' +
-	                helpString('intro.navigation.editor_street', {
-	                    button: icon(href, 'pre-text'),
-	                    field1: onewayField.label(),
-	                    field2: maxspeedField.label()
-	                }), { duration: 0 }
-	            );
+	  function clickTownHall() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    var entity = context.hasEntity(hallId);
+	    if (!entity) return;
+	    reveal(null, null, {
+	      duration: 0
+	    });
+	    context.map().centerZoomEase(entity.loc, 19, 500);
+	    timeout(function () {
+	      var entity = context.hasEntity(hallId);
+	      if (!entity) return;
+	      var box = pointBox(entity.loc, context);
+	      var textId = context.lastPointerType() === 'mouse' ? 'click_townhall' : 'tap_townhall';
+	      reveal(box, helpHtml('intro.navigation.' + textId));
+	      context.map().on('move.intro drawn.intro', function () {
+	        var entity = context.hasEntity(hallId);
+	        if (!entity) return;
+	        var box = pointBox(entity.loc, context);
+	        reveal(box, helpHtml('intro.navigation.' + textId), {
+	          duration: 0
 	        });
+	      });
+	      context.on('enter.intro', function () {
+	        if (isTownHallSelected()) continueTo(selectedTownHall);
+	      });
+	    }, 550); // after centerZoomEase
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
-
+	    context.history().on('change.intro', function () {
+	      if (!context.hasEntity(hallId)) {
+	        continueTo(clickTownHall);
+	      }
+	    });
 
-	    function play() {
-	        dispatch$1.call('done');
-	        reveal('.ideditor',
-	            helpString('intro.navigation.play', { next: _t('intro.points.title') }), {
-	                tooltipBox: '.intro-nav-wrap .chapter-point',
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { reveal('.ideditor'); }
-	            }
-	        );
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function selectedTownHall() {
+	    if (!isTownHallSelected()) return clickTownHall();
+	    var entity = context.hasEntity(hallId);
+	    if (!entity) return clickTownHall();
+	    var box = pointBox(entity.loc, context);
 
-	    chapter.enter = function() {
-	        dragMap();
+	    var onClick = function onClick() {
+	      continueTo(editorTownHall);
 	    };
 
+	    reveal(box, helpHtml('intro.navigation.selected_townhall'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    context.map().on('move.intro drawn.intro', function () {
+	      var entity = context.hasEntity(hallId);
+	      if (!entity) return;
+	      var box = pointBox(entity.loc, context);
+	      reveal(box, helpHtml('intro.navigation.selected_townhall'), {
+	        duration: 0,
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: onClick
+	      });
+	    });
+	    context.history().on('change.intro', function () {
+	      if (!context.hasEntity(hallId)) {
+	        continueTo(clickTownHall);
+	      }
+	    });
+
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    chapter.exit = function() {
-	        timeouts.forEach(window.clearTimeout);
-	        context.on('enter.intro exit.intro', null);
-	        context.map().on('move.intro drawn.intro', null);
-	        context.history().on('change.intro', null);
-	        context.container().select('.inspector-wrap').on('wheel.intro', null);
-	        context.container().select('.search-header input').on('keydown.intro keyup.intro', null);
-	    };
+	  function editorTownHall() {
+	    if (!isTownHallSelected()) return clickTownHall(); // disallow scrolling
 
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
 
-	    chapter.restart = function() {
-	        chapter.exit();
-	        chapter.enter();
+	    var onClick = function onClick() {
+	      continueTo(presetTownHall);
 	    };
 
+	    reveal('.entity-editor-pane', helpHtml('intro.navigation.editor_townhall'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    context.on('exit.intro', function () {
+	      continueTo(clickTownHall);
+	    });
+	    context.history().on('change.intro', function () {
+	      if (!context.hasEntity(hallId)) {
+	        continueTo(clickTownHall);
+	      }
+	    });
 
-	    return utilRebind(chapter, dispatch$1, 'on');
-	}
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	function uiIntroPoint(context, reveal) {
-	    var dispatch$1 = dispatch('done');
-	    var timeouts = [];
-	    var intersection = [-85.63279, 41.94394];
-	    var building = [-85.632422, 41.944045];
-	    var cafePreset = _mainPresetIndex.item('amenity/cafe');
-	    var _pointID = null;
+	  function presetTownHall() {
+	    if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..
 
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling
 
-	    var chapter = {
-	        title: 'intro.points.title'
-	    };
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel); // preset match, in case the user happened to change it.
 
+	    var entity = context.entity(context.selectedIDs()[0]);
+	    var preset = _mainPresetIndex.match(entity, context.graph());
 
-	    function timeout(f, t) {
-	        timeouts.push(window.setTimeout(f, t));
-	    }
+	    var onClick = function onClick() {
+	      continueTo(fieldsTownHall);
+	    };
 
+	    reveal('.entity-editor-pane .section-feature-type', helpHtml('intro.navigation.preset_townhall', {
+	      preset: preset.name()
+	    }), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    context.on('exit.intro', function () {
+	      continueTo(clickTownHall);
+	    });
+	    context.history().on('change.intro', function () {
+	      if (!context.hasEntity(hallId)) {
+	        continueTo(clickTownHall);
+	      }
+	    });
 
-	    function eventCancel() {
-	        event.stopPropagation();
-	        event.preventDefault();
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function fieldsTownHall() {
+	    if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..
 
-	    function addPoint() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');
-
-	        var msec = transitionTime(intersection, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(intersection, 19, msec);
-
-	        timeout(function() {
-	            var tooltip = reveal('button.add-point',
-	                helpString('intro.points.points_info') + '{br}' + helpString('intro.points.add_point'));
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling
 
-	            _pointID = null;
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
 
-	            tooltip.selectAll('.popover-inner')
-	                .insert('svg', 'span')
-	                .attr('class', 'tooltip-illustration')
-	                .append('use')
-	                .attr('xlink:href', '#iD-graphic-points');
+	    var onClick = function onClick() {
+	      continueTo(closeTownHall);
+	    };
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'add-point') { return; }
-	                continueTo(placePoint);
-	            });
-	        }, msec + 100);
+	    reveal('.entity-editor-pane .section-preset-fields', helpHtml('intro.navigation.fields_townhall'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    context.on('exit.intro', function () {
+	      continueTo(clickTownHall);
+	    });
+	    context.history().on('change.intro', function () {
+	      if (!context.hasEntity(hallId)) {
+	        continueTo(clickTownHall);
+	      }
+	    });
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function closeTownHall() {
+	    if (!isTownHallSelected()) return clickTownHall();
+	    var selector = '.entity-editor-pane button.close svg use';
+	    var href = select(selector).attr('href') || '#iD-icon-close';
+	    reveal('.entity-editor-pane', helpHtml('intro.navigation.close_townhall', {
+	      button: icon(href, 'inline')
+	    }));
+	    context.on('exit.intro', function () {
+	      continueTo(searchStreet);
+	    });
+	    context.history().on('change.intro', function () {
+	      // update the close icon in the tooltip if the user edits something.
+	      var selector = '.entity-editor-pane button.close svg use';
+	      var href = select(selector).attr('href') || '#iD-icon-close';
+	      reveal('.entity-editor-pane', helpHtml('intro.navigation.close_townhall', {
+	        button: icon(href, 'inline')
+	      }), {
+	        duration: 0
+	      });
+	    });
 
-	    function placePoint() {
-	        if (context.mode().id !== 'add-point') {
-	            return chapter.restart();
-	        }
-
-	        var pointBox = pad(building, 150, context);
-	        var textId = context.lastPointerType() === 'mouse' ? 'place_point' : 'place_point_touch';
-	        reveal(pointBox, helpString('intro.points.' + textId));
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            pointBox = pad(building, 150, context);
-	            reveal(pointBox, helpString('intro.points.' + textId), { duration: 0 });
-	        });
+	  function searchStreet() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial'); // ensure spring street exists
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id !== 'select') { return chapter.restart(); }
-	            _pointID = context.mode().selectedIDs()[0];
-	            continueTo(searchPreset);
-	        });
+	    var msec = transitionTime(springStreet, context.map().center());
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
 	    }
 
+	    context.map().centerZoomEase(springStreet, 19, msec); // ..and user can see it
 
-	    function searchPreset() {
-	        if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-	            return addPoint();
-	        }
-
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
-
-	        context.container().select('.preset-search-input')
-	            .on('keydown.intro', null)
-	            .on('keyup.intro', checkPresetSearch);
+	    timeout(function () {
+	      reveal('.search-header input', helpHtml('intro.navigation.search_street', {
+	        name: _t('intro.graph.name.spring-street')
+	      }));
+	      context.container().select('.search-header input').on('keyup.intro', checkSearchResult);
+	    }, msec + 100);
+	  }
 
-	        reveal('.preset-search-input',
-	            helpString('intro.points.search_cafe', { preset: cafePreset.name() })
-	        );
+	  function checkSearchResult() {
+	    var first = context.container().select('.feature-list-item:nth-child(0n+2)'); // skip "No Results" item
 
-	        context.on('enter.intro', function(mode) {
-	            if (!_pointID || !context.hasEntity(_pointID)) {
-	                return continueTo(addPoint);
-	            }
+	    var firstName = first.select('.entity-name');
+	    var name = _t('intro.graph.name.spring-street');
 
-	            var ids = context.selectedIDs();
-	            if (mode.id !== 'select' || !ids.length || ids[0] !== _pointID) {
-	                // keep the user's point selected..
-	                context.enter(modeSelect(context, [_pointID]));
+	    if (!firstName.empty() && firstName.html() === name) {
+	      reveal(first.node(), helpHtml('intro.navigation.choose_street', {
+	        name: name
+	      }), {
+	        duration: 300
+	      });
+	      context.on('exit.intro', function () {
+	        continueTo(selectedStreet);
+	      });
+	      context.container().select('.search-header input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
+	    }
 
-	                // disallow scrolling
-	                context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.container().select('.search-header input').on('keydown.intro', null).on('keyup.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	                context.container().select('.preset-search-input')
-	                    .on('keydown.intro', null)
-	                    .on('keyup.intro', checkPresetSearch);
+	  function selectedStreet() {
+	    if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
+	      return searchStreet();
+	    }
 
-	                reveal('.preset-search-input',
-	                    helpString('intro.points.search_cafe', { preset: cafePreset.name() })
-	                );
+	    var onClick = function onClick() {
+	      continueTo(editorStreet);
+	    };
 
-	                context.history().on('change.intro', null);
-	            }
+	    var entity = context.entity(springStreetEndId);
+	    var box = pointBox(entity.loc, context);
+	    box.height = 500;
+	    reveal(box, helpHtml('intro.navigation.selected_street', {
+	      name: _t('intro.graph.name.spring-street')
+	    }), {
+	      duration: 600,
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    timeout(function () {
+	      context.map().on('move.intro drawn.intro', function () {
+	        var entity = context.hasEntity(springStreetEndId);
+	        if (!entity) return;
+	        var box = pointBox(entity.loc, context);
+	        box.height = 500;
+	        reveal(box, helpHtml('intro.navigation.selected_street', {
+	          name: _t('intro.graph.name.spring-street')
+	        }), {
+	          duration: 0,
+	          buttonText: _t.html('intro.ok'),
+	          buttonCallback: onClick
 	        });
+	      });
+	    }, 600); // after reveal.
 
+	    context.on('enter.intro', function (mode) {
+	      if (!context.hasEntity(springStreetId)) {
+	        return continueTo(searchStreet);
+	      }
 
-	        function checkPresetSearch() {
-	            var first = context.container().select('.preset-list-item:first-child');
-
-	            if (first.classed('preset-amenity-cafe')) {
-	                context.container().select('.preset-search-input')
-	                    .on('keydown.intro', eventCancel, true)
-	                    .on('keyup.intro', null);
-
-	                reveal(first.select('.preset-list-button').node(),
-	                    helpString('intro.points.choose_cafe', { preset: cafePreset.name() }),
-	                    { duration: 300 }
-	                );
+	      var ids = context.selectedIDs();
 
-	                context.history().on('change.intro', function() {
-	                    continueTo(aboutFeatureEditor);
-	                });
-	            }
-	        }
+	      if (mode.id !== 'select' || !ids.length || ids[0] !== springStreetId) {
+	        // keep Spring Street selected..
+	        context.enter(modeSelect(context, [springStreetId]));
+	      }
+	    });
+	    context.history().on('change.intro', function () {
+	      if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
+	        timeout(function () {
+	          continueTo(searchStreet);
+	        }, 300); // after any transition (e.g. if user deleted intersection)
+	      }
+	    });
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.history().on('change.intro', null);
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function editorStreet() {
+	    var selector = '.entity-editor-pane button.close svg use';
+	    var href = select(selector).attr('href') || '#iD-icon-close';
+	    reveal('.entity-editor-pane', helpHtml('intro.navigation.street_different_fields') + '{br}' + helpHtml('intro.navigation.editor_street', {
+	      button: icon(href, 'inline'),
+	      field1: onewayField.label(),
+	      field2: maxspeedField.label()
+	    }));
+	    context.on('exit.intro', function () {
+	      continueTo(play);
+	    });
+	    context.history().on('change.intro', function () {
+	      // update the close icon in the tooltip if the user edits something.
+	      var selector = '.entity-editor-pane button.close svg use';
+	      var href = select(selector).attr('href') || '#iD-icon-close';
+	      reveal('.entity-editor-pane', helpHtml('intro.navigation.street_different_fields') + '{br}' + helpHtml('intro.navigation.editor_street', {
+	        button: icon(href, 'inline'),
+	        field1: onewayField.label(),
+	        field2: maxspeedField.label()
+	      }), {
+	        duration: 0
+	      });
+	    });
 
-	    function aboutFeatureEditor() {
-	        if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-	            return addPoint();
-	        }
-
-	        timeout(function() {
-	            reveal('.entity-editor-pane', helpString('intro.points.feature_editor'), {
-	                tooltipClass: 'intro-points-describe',
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { continueTo(addName); }
-	            });
-	        }, 400);
-
-	        context.on('exit.intro', function() {
-	            // if user leaves select mode here, just continue with the tutorial.
-	            continueTo(reselectPoint);
-	        });
-
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function play() {
+	    dispatch.call('done');
+	    reveal('.ideditor', helpHtml('intro.navigation.play', {
+	      next: _t('intro.points.title')
+	    }), {
+	      tooltipBox: '.intro-nav-wrap .chapter-point',
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        reveal('.ideditor');
+	      }
+	    });
+	  }
 
-	    function addName() {
-	        if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-	            return addPoint();
-	        }
+	  chapter.enter = function () {
+	    dragMap();
+	  };
 
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	  chapter.exit = function () {
+	    timeouts.forEach(window.clearTimeout);
+	    context.on('enter.intro exit.intro', null);
+	    context.map().on('move.intro drawn.intro', null);
+	    context.history().on('change.intro', null);
+	    context.container().select('.inspector-wrap').on('wheel.intro', null);
+	    context.container().select('.search-header input').on('keydown.intro keyup.intro', null);
+	  };
 
-	        var addNameString = helpString('intro.points.fields_info') + '{br}' + helpString('intro.points.add_name');
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	        timeout(function() {
-	            // It's possible for the user to add a name in a previous step..
-	            // If so, don't tell them to add the name in this step.
-	            // Give them an OK button instead.
-	            var entity = context.entity(_pointID);
-	            if (entity.tags.name) {
-	                var tooltip = reveal('.entity-editor-pane', addNameString, {
-	                    tooltipClass: 'intro-points-describe',
-	                    buttonText: _t('intro.ok'),
-	                    buttonCallback: function() { continueTo(addCloseEditor); }
-	                });
-	                tooltip.select('.instruction').style('display', 'none');
+	  return utilRebind(chapter, dispatch, 'on');
+	}
 
-	            } else {
-	                reveal('.entity-editor-pane', addNameString,
-	                    { tooltipClass: 'intro-points-describe' }
-	                );
-	            }
-	        }, 400);
+	function uiIntroPoint(context, reveal) {
+	  var dispatch = dispatch$8('done');
+	  var timeouts = [];
+	  var intersection = [-85.63279, 41.94394];
+	  var building = [-85.632422, 41.944045];
+	  var cafePreset = _mainPresetIndex.item('amenity/cafe');
+	  var _pointID = null;
+	  var chapter = {
+	    title: 'intro.points.title'
+	  };
 
-	        context.history().on('change.intro', function() {
-	            continueTo(addCloseEditor);
-	        });
+	  function timeout(f, t) {
+	    timeouts.push(window.setTimeout(f, t));
+	  }
 
-	        context.on('exit.intro', function() {
-	            // if user leaves select mode here, just continue with the tutorial.
-	            continueTo(reselectPoint);
-	        });
+	  function eventCancel(d3_event) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	  }
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	  function addPoint() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    var msec = transitionTime(intersection, context.map().center());
 
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
-	    function addCloseEditor() {
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    context.map().centerZoomEase(intersection, 19, msec);
+	    timeout(function () {
+	      var tooltip = reveal('button.add-point', helpHtml('intro.points.points_info') + '{br}' + helpHtml('intro.points.add_point'));
+	      _pointID = null;
+	      tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-points');
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'add-point') return;
+	        continueTo(placePoint);
+	      });
+	    }, msec + 100);
 
-	        var selector = '.entity-editor-pane button.close svg use';
-	        var href = select(selector).attr('href') || '#iD-icon-close';
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context.on('exit.intro', function() {
-	            continueTo(reselectPoint);
-	        });
+	  function placePoint() {
+	    if (context.mode().id !== 'add-point') {
+	      return chapter.restart();
+	    }
 
-	        reveal('.entity-editor-pane',
-	            helpString('intro.points.add_close', { button: icon(href, 'pre-text') })
-	        );
+	    var pointBox = pad(building, 150, context);
+	    var textId = context.lastPointerType() === 'mouse' ? 'place_point' : 'place_point_touch';
+	    reveal(pointBox, helpHtml('intro.points.' + textId));
+	    context.map().on('move.intro drawn.intro', function () {
+	      pointBox = pad(building, 150, context);
+	      reveal(pointBox, helpHtml('intro.points.' + textId), {
+	        duration: 0
+	      });
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id !== 'select') return chapter.restart();
+	      _pointID = context.mode().selectedIDs()[0];
+	      continueTo(searchPreset);
+	    });
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function searchPreset() {
+	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+	      return addPoint();
+	    } // disallow scrolling
 
-	    function reselectPoint() {
-	        if (!_pointID) { return chapter.restart(); }
-	        var entity = context.hasEntity(_pointID);
-	        if (!entity) { return chapter.restart(); }
 
-	        // make sure it's still a cafe, in case user somehow changed it..
-	        var oldPreset = _mainPresetIndex.match(entity, context.graph());
-	        context.replace(actionChangePreset(_pointID, oldPreset, cafePreset));
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+	    reveal('.preset-search-input', helpHtml('intro.points.search_cafe', {
+	      preset: cafePreset.name()
+	    }));
+	    context.on('enter.intro', function (mode) {
+	      if (!_pointID || !context.hasEntity(_pointID)) {
+	        return continueTo(addPoint);
+	      }
 
-	        context.enter(modeBrowse(context));
+	      var ids = context.selectedIDs();
 
-	        var msec = transitionTime(entity.loc, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerEase(entity.loc, msec);
+	      if (mode.id !== 'select' || !ids.length || ids[0] !== _pointID) {
+	        // keep the user's point selected..
+	        context.enter(modeSelect(context, [_pointID])); // disallow scrolling
 
-	        timeout(function() {
-	            var box = pointBox(entity.loc, context);
-	            reveal(box, helpString('intro.points.reselect'), { duration: 600 });
+	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	        context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+	        reveal('.preset-search-input', helpHtml('intro.points.search_cafe', {
+	          preset: cafePreset.name()
+	        }));
+	        context.history().on('change.intro', null);
+	      }
+	    });
 
-	            timeout(function() {
-	                context.map().on('move.intro drawn.intro', function() {
-	                    var entity = context.hasEntity(_pointID);
-	                    if (!entity) { return chapter.restart(); }
-	                    var box = pointBox(entity.loc, context);
-	                    reveal(box, helpString('intro.points.reselect'), { duration: 0 });
-	                });
-	            }, 600); // after reveal..
+	    function checkPresetSearch() {
+	      var first = context.container().select('.preset-list-item:first-child');
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'select') { return; }
-	                continueTo(updatePoint);
-	            });
+	      if (first.classed('preset-amenity-cafe')) {
+	        context.container().select('.preset-search-input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
+	        reveal(first.select('.preset-list-button').node(), helpHtml('intro.points.choose_cafe', {
+	          preset: cafePreset.name()
+	        }), {
+	          duration: 300
+	        });
+	        context.history().on('change.intro', function () {
+	          continueTo(aboutFeatureEditor);
+	        });
+	      }
+	    }
 
-	        }, msec + 100);
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+	      nextStep();
+	    }
+	  }
+
+	  function aboutFeatureEditor() {
+	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+	      return addPoint();
+	    }
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
+	    timeout(function () {
+	      reveal('.entity-editor-pane', helpHtml('intro.points.feature_editor'), {
+	        tooltipClass: 'intro-points-describe',
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: function buttonCallback() {
+	          continueTo(addName);
 	        }
+	      });
+	    }, 400);
+	    context.on('exit.intro', function () {
+	      // if user leaves select mode here, just continue with the tutorial.
+	      continueTo(reselectPoint);
+	    });
+
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function addName() {
+	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+	      return addPoint();
+	    } // reset pane, in case user happened to change it..
 
-	    function updatePoint() {
-	        if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-	            return continueTo(reselectPoint);
-	        }
 
-	        // reset pane, in case user happened to untag the point..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    var addNameString = helpHtml('intro.points.fields_info') + '{br}' + helpHtml('intro.points.add_name');
+	    timeout(function () {
+	      // It's possible for the user to add a name in a previous step..
+	      // If so, don't tell them to add the name in this step.
+	      // Give them an OK button instead.
+	      var entity = context.entity(_pointID);
 
-	        context.on('exit.intro', function() {
-	            continueTo(reselectPoint);
+	      if (entity.tags.name) {
+	        var tooltip = reveal('.entity-editor-pane', addNameString, {
+	          tooltipClass: 'intro-points-describe',
+	          buttonText: _t.html('intro.ok'),
+	          buttonCallback: function buttonCallback() {
+	            continueTo(addCloseEditor);
+	          }
 	        });
-
-	        context.history().on('change.intro', function() {
-	            continueTo(updateCloseEditor);
+	        tooltip.select('.instruction').style('display', 'none');
+	      } else {
+	        reveal('.entity-editor-pane', addNameString, {
+	          tooltipClass: 'intro-points-describe'
 	        });
+	      }
+	    }, 400);
+	    context.history().on('change.intro', function () {
+	      continueTo(addCloseEditor);
+	    });
+	    context.on('exit.intro', function () {
+	      // if user leaves select mode here, just continue with the tutorial.
+	      continueTo(reselectPoint);
+	    });
 
-	        timeout(function() {
-	            reveal('.entity-editor-pane', helpString('intro.points.update'),
-	                { tooltipClass: 'intro-points-describe' }
-	            );
-	        }, 400);
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	  function addCloseEditor() {
+	    // reset pane, in case user happened to change it..
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    var selector = '.entity-editor-pane button.close svg use';
+	    var href = select(selector).attr('href') || '#iD-icon-close';
+	    context.on('exit.intro', function () {
+	      continueTo(reselectPoint);
+	    });
+	    reveal('.entity-editor-pane', helpHtml('intro.points.add_close', {
+	      button: icon(href, 'inline')
+	    }));
+
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function reselectPoint() {
+	    if (!_pointID) return chapter.restart();
+	    var entity = context.hasEntity(_pointID);
+	    if (!entity) return chapter.restart(); // make sure it's still a cafe, in case user somehow changed it..
 
-	    function updateCloseEditor() {
-	        if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-	            return continueTo(reselectPoint);
-	        }
+	    var oldPreset = _mainPresetIndex.match(entity, context.graph());
+	    context.replace(actionChangePreset(_pointID, oldPreset, cafePreset));
+	    context.enter(modeBrowse(context));
+	    var msec = transitionTime(entity.loc, context.map().center());
 
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
-	        context.on('exit.intro', function() {
-	            continueTo(rightClickPoint);
+	    context.map().centerEase(entity.loc, msec);
+	    timeout(function () {
+	      var box = pointBox(entity.loc, context);
+	      reveal(box, helpHtml('intro.points.reselect'), {
+	        duration: 600
+	      });
+	      timeout(function () {
+	        context.map().on('move.intro drawn.intro', function () {
+	          var entity = context.hasEntity(_pointID);
+	          if (!entity) return chapter.restart();
+	          var box = pointBox(entity.loc, context);
+	          reveal(box, helpHtml('intro.points.reselect'), {
+	            duration: 0
+	          });
 	        });
+	      }, 600); // after reveal..
 
-	        timeout(function() {
-	            reveal('.entity-editor-pane',
-	                helpString('intro.points.update_close', { button: icon('#iD-icon-close', 'pre-text') })
-	            );
-	        }, 500);
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'select') return;
+	        continueTo(updatePoint);
+	      });
+	    }, msec + 100);
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function updatePoint() {
+	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+	      return continueTo(reselectPoint);
+	    } // reset pane, in case user happened to untag the point..
 
-	    function rightClickPoint() {
-	        if (!_pointID) { return chapter.restart(); }
-	        var entity = context.hasEntity(_pointID);
-	        if (!entity) { return chapter.restart(); }
-
-	        context.enter(modeBrowse(context));
 
-	        var box = pointBox(entity.loc, context);
-	        var textId = context.lastPointerType() === 'mouse' ? 'rightclick' : 'edit_menu_touch';
-	        reveal(box, helpString('intro.points.' + textId), { duration: 600 });
-
-	        timeout(function() {
-	            context.map().on('move.intro', function() {
-	                var entity = context.hasEntity(_pointID);
-	                if (!entity) { return chapter.restart(); }
-	                var box = pointBox(entity.loc, context);
-	                reveal(box, helpString('intro.points.' + textId), { duration: 0 });
-	            });
-	        }, 600); // after reveal
-
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id !== 'select') { return; }
-	            var ids = context.selectedIDs();
-	            if (ids.length !== 1 || ids[0] !== _pointID) { return; }
-
-	            timeout(function() {
-	                var node = selectMenuItem(context, 'delete').node();
-	                if (!node) { return; }
-	                continueTo(enterDelete);
-	            }, 50);  // after menu visible
-	        });
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    context.on('exit.intro', function () {
+	      continueTo(reselectPoint);
+	    });
+	    context.history().on('change.intro', function () {
+	      continueTo(updateCloseEditor);
+	    });
+	    timeout(function () {
+	      reveal('.entity-editor-pane', helpHtml('intro.points.update'), {
+	        tooltipClass: 'intro-points-describe'
+	      });
+	    }, 400);
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.map().on('move.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function updateCloseEditor() {
+	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+	      return continueTo(reselectPoint);
+	    } // reset pane, in case user happened to change it..
 
-	    function enterDelete() {
-	        if (!_pointID) { return chapter.restart(); }
-	        var entity = context.hasEntity(_pointID);
-	        if (!entity) { return chapter.restart(); }
-
-	        var node = selectMenuItem(context, 'delete').node();
-	        if (!node) { return continueTo(rightClickPoint); }
 
-	        reveal('.edit-menu',
-	            helpString('intro.points.delete'),
-	            { padding: 50 }
-	        );
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    context.on('exit.intro', function () {
+	      continueTo(rightClickPoint);
+	    });
+	    timeout(function () {
+	      reveal('.entity-editor-pane', helpHtml('intro.points.update_close', {
+	        button: icon('#iD-icon-close', 'inline')
+	      }));
+	    }, 500);
 
-	        timeout(function() {
-	            context.map().on('move.intro', function() {
-	                reveal('.edit-menu',
-	                    helpString('intro.points.delete'),
-	                    { duration: 0,  padding: 50 }
-	                );
-	            });
-	        }, 300); // after menu visible
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context.on('exit.intro', function() {
-	            if (!_pointID) { return chapter.restart(); }
-	            var entity = context.hasEntity(_pointID);
-	            if (entity) { return continueTo(rightClickPoint); }  // point still exists
+	  function rightClickPoint() {
+	    if (!_pointID) return chapter.restart();
+	    var entity = context.hasEntity(_pointID);
+	    if (!entity) return chapter.restart();
+	    context.enter(modeBrowse(context));
+	    var box = pointBox(entity.loc, context);
+	    var textId = context.lastPointerType() === 'mouse' ? 'rightclick' : 'edit_menu_touch';
+	    reveal(box, helpHtml('intro.points.' + textId), {
+	      duration: 600
+	    });
+	    timeout(function () {
+	      context.map().on('move.intro', function () {
+	        var entity = context.hasEntity(_pointID);
+	        if (!entity) return chapter.restart();
+	        var box = pointBox(entity.loc, context);
+	        reveal(box, helpHtml('intro.points.' + textId), {
+	          duration: 0
 	        });
+	      });
+	    }, 600); // after reveal
 
-	        context.history().on('change.intro', function(changed) {
-	            if (changed.deleted().length) {
-	                continueTo(undo);
-	            }
-	        });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id !== 'select') return;
+	      var ids = context.selectedIDs();
+	      if (ids.length !== 1 || ids[0] !== _pointID) return;
+	      timeout(function () {
+	        var node = selectMenuItem(context, 'delete').node();
+	        if (!node) return;
+	        continueTo(enterDelete);
+	      }, 50); // after menu visible
+	    });
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro', null);
-	            context.history().on('change.intro', null);
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro', null);
+	      nextStep();
 	    }
+	  }
+
+	  function enterDelete() {
+	    if (!_pointID) return chapter.restart();
+	    var entity = context.hasEntity(_pointID);
+	    if (!entity) return chapter.restart();
+	    var node = selectMenuItem(context, 'delete').node();
 
+	    if (!node) {
+	      return continueTo(rightClickPoint);
+	    }
 
-	    function undo() {
-	        context.history().on('change.intro', function() {
-	            continueTo(play);
+	    reveal('.edit-menu', helpHtml('intro.points.delete'), {
+	      padding: 50
+	    });
+	    timeout(function () {
+	      context.map().on('move.intro', function () {
+	        reveal('.edit-menu', helpHtml('intro.points.delete'), {
+	          duration: 0,
+	          padding: 50
 	        });
+	      });
+	    }, 300); // after menu visible
 
-	        reveal('.top-toolbar button.undo-button',
-	            helpString('intro.points.undo')
-	        );
+	    context.on('exit.intro', function () {
+	      if (!_pointID) return chapter.restart();
+	      var entity = context.hasEntity(_pointID);
+	      if (entity) return continueTo(rightClickPoint); // point still exists
+	    });
+	    context.history().on('change.intro', function (changed) {
+	      if (changed.deleted().length) {
+	        continueTo(undo);
+	      }
+	    });
 
-	        function continueTo(nextStep) {
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro', null);
+	      context.history().on('change.intro', null);
+	      context.on('exit.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function undo() {
+	    context.history().on('change.intro', function () {
+	      continueTo(play);
+	    });
+	    reveal('.top-toolbar button.undo-button', helpHtml('intro.points.undo'));
 
-	    function play() {
-	        dispatch$1.call('done');
-	        reveal('.ideditor',
-	            helpString('intro.points.play', { next: _t('intro.areas.title') }), {
-	                tooltipBox: '.intro-nav-wrap .chapter-area',
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { reveal('.ideditor'); }
-	            }
-	        );
+	    function continueTo(nextStep) {
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function play() {
+	    dispatch.call('done');
+	    reveal('.ideditor', helpHtml('intro.points.play', {
+	      next: _t('intro.areas.title')
+	    }), {
+	      tooltipBox: '.intro-nav-wrap .chapter-area',
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        reveal('.ideditor');
+	      }
+	    });
+	  }
 
-	    chapter.enter = function() {
-	        addPoint();
-	    };
+	  chapter.enter = function () {
+	    addPoint();
+	  };
 
+	  chapter.exit = function () {
+	    timeouts.forEach(window.clearTimeout);
+	    context.on('enter.intro exit.intro', null);
+	    context.map().on('move.intro drawn.intro', null);
+	    context.history().on('change.intro', null);
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+	  };
 
-	    chapter.exit = function() {
-	        timeouts.forEach(window.clearTimeout);
-	        context.on('enter.intro exit.intro', null);
-	        context.map().on('move.intro drawn.intro', null);
-	        context.history().on('change.intro', null);
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
-	        context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-	    };
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
+	  return utilRebind(chapter, dispatch, 'on');
+	}
 
-	    chapter.restart = function() {
-	        chapter.exit();
-	        chapter.enter();
-	    };
+	function uiIntroArea(context, reveal) {
+	  var dispatch = dispatch$8('done');
+	  var playground = [-85.63552, 41.94159];
+	  var playgroundPreset = _mainPresetIndex.item('leisure/playground');
+	  var nameField = _mainPresetIndex.field('name');
+	  var descriptionField = _mainPresetIndex.field('description');
+	  var timeouts = [];
 
+	  var _areaID;
 
-	    return utilRebind(chapter, dispatch$1, 'on');
-	}
+	  var chapter = {
+	    title: 'intro.areas.title'
+	  };
 
-	function uiIntroArea(context, reveal) {
-	    var dispatch$1 = dispatch('done');
-	    var playground = [-85.63552, 41.94159];
-	    var playgroundPreset = _mainPresetIndex.item('leisure/playground');
-	    var nameField = _mainPresetIndex.field('name');
-	    var descriptionField = _mainPresetIndex.field('description');
-	    var timeouts = [];
-	    var _areaID;
+	  function timeout(f, t) {
+	    timeouts.push(window.setTimeout(f, t));
+	  }
 
+	  function eventCancel(d3_event) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	  }
 
-	    var chapter = {
-	        title: 'intro.areas.title'
-	    };
+	  function revealPlayground(center, text, options) {
+	    var padding = 180 * Math.pow(2, context.map().zoom() - 19.5);
+	    var box = pad(center, padding, context);
+	    reveal(box, text, options);
+	  }
 
+	  function addArea() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    _areaID = null;
+	    var msec = transitionTime(playground, context.map().center());
 
-	    function timeout(f, t) {
-	        timeouts.push(window.setTimeout(f, t));
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
 	    }
 
+	    context.map().centerZoomEase(playground, 19, msec);
+	    timeout(function () {
+	      var tooltip = reveal('button.add-area', helpHtml('intro.areas.add_playground'));
+	      tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-areas');
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'add-area') return;
+	        continueTo(startPlayground);
+	      });
+	    }, msec + 100);
 
-	    function eventCancel() {
-	        event.stopPropagation();
-	        event.preventDefault();
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
-
-	    function revealPlayground(center, text, options) {
-	        var padding = 180 * Math.pow(2, context.map().zoom() - 19.5);
-	        var box = pad(center, padding, context);
-	        reveal(box, text, options);
+	  function startPlayground() {
+	    if (context.mode().id !== 'add-area') {
+	      return chapter.restart();
 	    }
 
+	    _areaID = null;
+	    context.map().zoomEase(19.5, 500);
+	    timeout(function () {
+	      var textId = context.lastPointerType() === 'mouse' ? 'starting_node_click' : 'starting_node_tap';
+	      var startDrawString = helpHtml('intro.areas.start_playground') + helpHtml('intro.areas.' + textId);
+	      revealPlayground(playground, startDrawString, {
+	        duration: 250
+	      });
+	      timeout(function () {
+	        context.map().on('move.intro drawn.intro', function () {
+	          revealPlayground(playground, startDrawString, {
+	            duration: 0
+	          });
+	        });
+	        context.on('enter.intro', function (mode) {
+	          if (mode.id !== 'draw-area') return chapter.restart();
+	          continueTo(continuePlayground);
+	        });
+	      }, 250); // after reveal
+	    }, 550); // after easing
 
-	    function addArea() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');
-	        _areaID = null;
-
-	        var msec = transitionTime(playground, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(playground, 19, msec);
-
-	        timeout(function() {
-	            var tooltip = reveal('button.add-area',
-	                helpString('intro.areas.add_playground'));
-
-	            tooltip.selectAll('.popover-inner')
-	                .insert('svg', 'span')
-	                .attr('class', 'tooltip-illustration')
-	                .append('use')
-	                .attr('xlink:href', '#iD-graphic-areas');
-
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'add-area') { return; }
-	                continueTo(startPlayground);
-	            });
-	        }, msec + 100);
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	  function continuePlayground() {
+	    if (context.mode().id !== 'draw-area') {
+	      return chapter.restart();
 	    }
 
+	    _areaID = null;
+	    revealPlayground(playground, helpHtml('intro.areas.continue_playground'), {
+	      duration: 250
+	    });
+	    timeout(function () {
+	      context.map().on('move.intro drawn.intro', function () {
+	        revealPlayground(playground, helpHtml('intro.areas.continue_playground'), {
+	          duration: 0
+	        });
+	      });
+	    }, 250); // after reveal
+
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id === 'draw-area') {
+	        var entity = context.hasEntity(context.selectedIDs()[0]);
 
-	    function startPlayground() {
-	        if (context.mode().id !== 'add-area') {
-	            return chapter.restart();
+	        if (entity && entity.nodes.length >= 6) {
+	          return continueTo(finishPlayground);
+	        } else {
+	          return;
 	        }
+	      } else if (mode.id === 'select') {
+	        _areaID = context.selectedIDs()[0];
+	        return continueTo(searchPresets);
+	      } else {
+	        return chapter.restart();
+	      }
+	    });
 
-	        _areaID = null;
-	        context.map().zoomEase(19.5, 500);
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        timeout(function() {
-	            var textId = context.lastPointerType() === 'mouse' ? 'starting_node_click' : 'starting_node_tap';
-	            var startDrawString = helpString('intro.areas.start_playground') + helpString('intro.areas.' + textId);
-	            revealPlayground(playground,
-	                startDrawString, { duration: 250 }
-	            );
+	  function finishPlayground() {
+	    if (context.mode().id !== 'draw-area') {
+	      return chapter.restart();
+	    }
 
-	            timeout(function() {
-	                context.map().on('move.intro drawn.intro', function() {
-	                    revealPlayground(playground,
-	                        startDrawString, { duration: 0 }
-	                    );
-	                });
-	                context.on('enter.intro', function(mode) {
-	                    if (mode.id !== 'draw-area') { return chapter.restart(); }
-	                    continueTo(continuePlayground);
-	                });
-	            }, 250);  // after reveal
+	    _areaID = null;
+	    var finishString = helpHtml('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.areas.finish_playground');
+	    revealPlayground(playground, finishString, {
+	      duration: 250
+	    });
+	    timeout(function () {
+	      context.map().on('move.intro drawn.intro', function () {
+	        revealPlayground(playground, finishString, {
+	          duration: 0
+	        });
+	      });
+	    }, 250); // after reveal
 
-	        }, 550);  // after easing
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id === 'draw-area') {
+	        return;
+	      } else if (mode.id === 'select') {
+	        _areaID = context.selectedIDs()[0];
+	        return continueTo(searchPresets);
+	      } else {
+	        return chapter.restart();
+	      }
+	    });
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function searchPresets() {
+	    if (!_areaID || !context.hasEntity(_areaID)) {
+	      return addArea();
+	    }
 
-	    function continuePlayground() {
-	        if (context.mode().id !== 'draw-area') {
-	            return chapter.restart();
-	        }
+	    var ids = context.selectedIDs();
 
-	        _areaID = null;
-	        revealPlayground(playground,
-	            helpString('intro.areas.continue_playground'),
-	            { duration: 250 }
-	        );
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	      context.enter(modeSelect(context, [_areaID]));
+	    } // disallow scrolling
 
-	        timeout(function() {
-	            context.map().on('move.intro drawn.intro', function() {
-	                revealPlayground(playground,
-	                    helpString('intro.areas.continue_playground'),
-	                    { duration: 0 }
-	                );
-	            });
-	        }, 250);  // after reveal
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'draw-area') {
-	                var entity = context.hasEntity(context.selectedIDs()[0]);
-	                if (entity && entity.nodes.length >= 6) {
-	                    return continueTo(finishPlayground);
-	                } else {
-	                    return;
-	                }
-	            } else if (mode.id === 'select') {
-	                _areaID = context.selectedIDs()[0];
-	                return continueTo(searchPresets);
-	            } else {
-	                return chapter.restart();
-	            }
-	        });
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    timeout(function () {
+	      // reset pane, in case user somehow happened to change it..
+	      context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	      context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+	      reveal('.preset-search-input', helpHtml('intro.areas.search_playground', {
+	        preset: playgroundPreset.name()
+	      }));
+	    }, 400); // after preset list pane visible..
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	    context.on('enter.intro', function (mode) {
+	      if (!_areaID || !context.hasEntity(_areaID)) {
+	        return continueTo(addArea);
+	      }
 
+	      var ids = context.selectedIDs();
 
-	    function finishPlayground() {
-	        if (context.mode().id !== 'draw-area') {
-	            return chapter.restart();
-	        }
+	      if (mode.id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	        // keep the user's area selected..
+	        context.enter(modeSelect(context, [_areaID])); // reset pane, in case user somehow happened to change it..
 
-	        _areaID = null;
+	        context.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling
 
-	        var finishString = helpString('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) +
-	            helpString('intro.areas.finish_playground');
-	        revealPlayground(playground,
-	            finishString, { duration: 250 }
-	        );
+	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	        context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+	        reveal('.preset-search-input', helpHtml('intro.areas.search_playground', {
+	          preset: playgroundPreset.name()
+	        }));
+	        context.history().on('change.intro', null);
+	      }
+	    });
 
-	        timeout(function() {
-	            context.map().on('move.intro drawn.intro', function() {
-	                revealPlayground(playground,
-	                    finishString, { duration: 0 }
-	                );
-	            });
-	        }, 250);  // after reveal
+	    function checkPresetSearch() {
+	      var first = context.container().select('.preset-list-item:first-child');
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'draw-area') {
-	                return;
-	            } else if (mode.id === 'select') {
-	                _areaID = context.selectedIDs()[0];
-	                return continueTo(searchPresets);
-	            } else {
-	                return chapter.restart();
-	            }
+	      if (first.classed('preset-leisure-playground')) {
+	        reveal(first.select('.preset-list-button').node(), helpHtml('intro.areas.choose_playground', {
+	          preset: playgroundPreset.name()
+	        }), {
+	          duration: 300
 	        });
+	        context.container().select('.preset-search-input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
+	        context.history().on('change.intro', function () {
+	          continueTo(clickAddField);
+	        });
+	      }
+	    }
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function clickAddField() {
+	    if (!_areaID || !context.hasEntity(_areaID)) {
+	      return addArea();
+	    }
 
-	    function searchPresets() {
-	        if (!_areaID || !context.hasEntity(_areaID)) {
-	            return addArea();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-	            context.enter(modeSelect(context, [_areaID]));
-	        }
+	    var ids = context.selectedIDs();
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	      return searchPresets();
+	    }
 
-	        timeout(function() {
-	            // reset pane, in case user somehow happened to change it..
-	            context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	    if (!context.container().select('.form-field-description').empty()) {
+	      return continueTo(describePlayground);
+	    } // disallow scrolling
 
-	            context.container().select('.preset-search-input')
-	                .on('keydown.intro', null)
-	                .on('keyup.intro', checkPresetSearch);
 
-	            reveal('.preset-search-input',
-	                helpString('intro.areas.search_playground', { preset: playgroundPreset.name() })
-	            );
-	        }, 400);  // after preset list pane visible..
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    timeout(function () {
+	      // reset pane, in case user somehow happened to change it..
+	      context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // It's possible for the user to add a description in a previous step..
+	      // If they did this already, just continue to next step.
 
-	        context.on('enter.intro', function(mode) {
-	            if (!_areaID || !context.hasEntity(_areaID)) {
-	                return continueTo(addArea);
-	            }
+	      var entity = context.entity(_areaID);
 
-	            var ids = context.selectedIDs();
-	            if (mode.id !== 'select' || !ids.length || ids[0] !== _areaID) {
-	                // keep the user's area selected..
-	                context.enter(modeSelect(context, [_areaID]));
+	      if (entity.tags.description) {
+	        return continueTo(play);
+	      } // scroll "Add field" into view
 
-	                // reset pane, in case user somehow happened to change it..
-	                context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
-	                // disallow scrolling
-	                context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
 
-	                context.container().select('.preset-search-input')
-	                    .on('keydown.intro', null)
-	                    .on('keyup.intro', checkPresetSearch);
+	      var box = context.container().select('.more-fields').node().getBoundingClientRect();
 
-	                reveal('.preset-search-input',
-	                    helpString('intro.areas.search_playground', { preset: playgroundPreset.name() })
-	                );
+	      if (box.top > 300) {
+	        var pane = context.container().select('.entity-editor-pane .inspector-body');
+	        var start = pane.node().scrollTop;
+	        var end = start + (box.top - 300);
+	        pane.transition().duration(250).tween('scroll.inspector', function () {
+	          var node = this;
+	          var i = d3_interpolateNumber(start, end);
+	          return function (t) {
+	            node.scrollTop = i(t);
+	          };
+	        });
+	      }
 
-	                context.history().on('change.intro', null);
-	            }
+	      timeout(function () {
+	        reveal('.more-fields .combobox-input', helpHtml('intro.areas.add_field', {
+	          name: nameField.label(),
+	          description: descriptionField.label()
+	        }), {
+	          duration: 300
+	        });
+	        context.container().select('.more-fields .combobox-input').on('click.intro', function () {
+	          // Watch for the combobox to appear...
+	          var watcher;
+	          watcher = window.setInterval(function () {
+	            if (!context.container().select('div.combobox').empty()) {
+	              window.clearInterval(watcher);
+	              continueTo(chooseDescriptionField);
+	            }
+	          }, 300);
 	        });
+	      }, 300); // after "Add Field" visible
+	    }, 400); // after editor pane visible
 
-	        function checkPresetSearch() {
-	            var first = context.container().select('.preset-list-item:first-child');
+	    context.on('exit.intro', function () {
+	      return continueTo(searchPresets);
+	    });
 
-	            if (first.classed('preset-leisure-playground')) {
-	                reveal(first.select('.preset-list-button').node(),
-	                    helpString('intro.areas.choose_playground', { preset: playgroundPreset.name() }),
-	                    { duration: 300 }
-	                );
+	    function continueTo(nextStep) {
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      context.container().select('.more-fields .combobox-input').on('click.intro', null);
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	                context.container().select('.preset-search-input')
-	                    .on('keydown.intro', eventCancel, true)
-	                    .on('keyup.intro', null);
+	  function chooseDescriptionField() {
+	    if (!_areaID || !context.hasEntity(_areaID)) {
+	      return addArea();
+	    }
 
-	                context.history().on('change.intro', function() {
-	                    continueTo(clickAddField);
-	                });
-	            }
-	        }
+	    var ids = context.selectedIDs();
 
-	        function continueTo(nextStep) {
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            context.on('enter.intro', null);
-	            context.history().on('change.intro', null);
-	            context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-	            nextStep();
-	        }
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	      return searchPresets();
 	    }
 
+	    if (!context.container().select('.form-field-description').empty()) {
+	      return continueTo(describePlayground);
+	    } // Make sure combobox is ready..
 
-	    function clickAddField() {
-	        if (!_areaID || !context.hasEntity(_areaID)) {
-	            return addArea();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-	            return searchPresets();
-	        }
 
-	        if (!context.container().select('.form-field-description').empty()) {
-	            return continueTo(describePlayground);
-	        }
+	    if (context.container().select('div.combobox').empty()) {
+	      return continueTo(clickAddField);
+	    } // Watch for the combobox to go away..
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
 
-	        timeout(function() {
-	            // reset pane, in case user somehow happened to change it..
-	            context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    var watcher;
+	    watcher = window.setInterval(function () {
+	      if (context.container().select('div.combobox').empty()) {
+	        window.clearInterval(watcher);
+	        timeout(function () {
+	          if (context.container().select('.form-field-description').empty()) {
+	            continueTo(retryChooseDescription);
+	          } else {
+	            continueTo(describePlayground);
+	          }
+	        }, 300); // after description field added.
+	      }
+	    }, 300);
+	    reveal('div.combobox', helpHtml('intro.areas.choose_field', {
+	      field: descriptionField.label()
+	    }), {
+	      duration: 300
+	    });
+	    context.on('exit.intro', function () {
+	      return continueTo(searchPresets);
+	    });
 
-	            // It's possible for the user to add a description in a previous step..
-	            // If they did this already, just continue to next step.
-	            var entity = context.entity(_areaID);
-	            if (entity.tags.description) {
-	                return continueTo(play);
-	            }
+	    function continueTo(nextStep) {
+	      if (watcher) window.clearInterval(watcher);
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            // scroll "Add field" into view
-	            var box = context.container().select('.more-fields').node().getBoundingClientRect();
-	            if (box.top > 300) {
-	                var pane = context.container().select('.entity-editor-pane .inspector-body');
-	                var start = pane.node().scrollTop;
-	                var end = start + (box.top - 300);
-
-	                pane
-	                    .transition()
-	                    .duration(250)
-	                    .tween('scroll.inspector', function() {
-	                        var node = this;
-	                        var i = d3_interpolateNumber(start, end);
-	                        return function(t) {
-	                            node.scrollTop = i(t);
-	                        };
-	                    });
-	            }
+	  function describePlayground() {
+	    if (!_areaID || !context.hasEntity(_areaID)) {
+	      return addArea();
+	    }
 
-	            timeout(function() {
-	                reveal('.more-fields .combobox-input',
-	                    helpString('intro.areas.add_field', {
-	                        name: nameField.label(),
-	                        description: descriptionField.label()
-	                    }),
-	                    { duration: 300 }
-	                );
+	    var ids = context.selectedIDs();
 
-	                context.container().select('.more-fields .combobox-input')
-	                    .on('click.intro', function() {
-	                        // Watch for the combobox to appear...
-	                        var watcher;
-	                        watcher = window.setInterval(function() {
-	                            if (!context.container().select('div.combobox').empty()) {
-	                                window.clearInterval(watcher);
-	                                continueTo(chooseDescriptionField);
-	                            }
-	                        }, 300);
-	                    });
-	            }, 300);  // after "Add Field" visible
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	      return searchPresets();
+	    } // reset pane, in case user happened to change it..
 
-	        }, 400);  // after editor pane visible
 
-	        context.on('exit.intro', function() {
-	            return continueTo(searchPresets);
-	        });
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%');
 
-	        function continueTo(nextStep) {
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            context.container().select('.more-fields .combobox-input').on('click.intro', null);
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    if (context.container().select('.form-field-description').empty()) {
+	      return continueTo(retryChooseDescription);
 	    }
 
+	    context.on('exit.intro', function () {
+	      continueTo(play);
+	    });
+	    reveal('.entity-editor-pane', helpHtml('intro.areas.describe_playground', {
+	      button: icon('#iD-icon-close', 'inline')
+	    }), {
+	      duration: 300
+	    });
 
-	    function chooseDescriptionField() {
-	        if (!_areaID || !context.hasEntity(_areaID)) {
-	            return addArea();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-	            return searchPresets();
-	        }
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        if (!context.container().select('.form-field-description').empty()) {
-	            return continueTo(describePlayground);
-	        }
+	  function retryChooseDescription() {
+	    if (!_areaID || !context.hasEntity(_areaID)) {
+	      return addArea();
+	    }
 
-	        // Make sure combobox is ready..
-	        if (context.container().select('div.combobox').empty()) {
-	            return continueTo(clickAddField);
-	        }
-	        // Watch for the combobox to go away..
-	        var watcher;
-	        watcher = window.setInterval(function() {
-	            if (context.container().select('div.combobox').empty()) {
-	                window.clearInterval(watcher);
-	                timeout(function() {
-	                    if (context.container().select('.form-field-description').empty()) {
-	                        continueTo(retryChooseDescription);
-	                    } else {
-	                        continueTo(describePlayground);
-	                    }
-	                }, 300);  // after description field added.
-	            }
-	        }, 300);
+	    var ids = context.selectedIDs();
 
-	        reveal('div.combobox',
-	            helpString('intro.areas.choose_field', { field: descriptionField.label() }),
-	            { duration: 300 }
-	        );
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	      return searchPresets();
+	    } // reset pane, in case user happened to change it..
 
-	        context.on('exit.intro', function() {
-	            return continueTo(searchPresets);
-	        });
 
-	        function continueTo(nextStep) {
-	            if (watcher) { window.clearInterval(watcher); }
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    reveal('.entity-editor-pane', helpHtml('intro.areas.retry_add_field', {
+	      field: descriptionField.label()
+	    }), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        continueTo(clickAddField);
+	      }
+	    });
+	    context.on('exit.intro', function () {
+	      return continueTo(searchPresets);
+	    });
+
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function play() {
+	    dispatch.call('done');
+	    reveal('.ideditor', helpHtml('intro.areas.play', {
+	      next: _t('intro.lines.title')
+	    }), {
+	      tooltipBox: '.intro-nav-wrap .chapter-line',
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        reveal('.ideditor');
+	      }
+	    });
+	  }
 
-	    function describePlayground() {
-	        if (!_areaID || !context.hasEntity(_areaID)) {
-	            return addArea();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-	            return searchPresets();
-	        }
+	  chapter.enter = function () {
+	    addArea();
+	  };
 
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	  chapter.exit = function () {
+	    timeouts.forEach(window.clearTimeout);
+	    context.on('enter.intro exit.intro', null);
+	    context.map().on('move.intro drawn.intro', null);
+	    context.history().on('change.intro', null);
+	    context.container().select('.inspector-wrap').on('wheel.intro', null);
+	    context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+	    context.container().select('.more-fields .combobox-input').on('click.intro', null);
+	  };
 
-	        if (context.container().select('.form-field-description').empty()) {
-	            return continueTo(retryChooseDescription);
-	        }
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	        context.on('exit.intro', function() {
-	            continueTo(play);
-	        });
+	  return utilRebind(chapter, dispatch, 'on');
+	}
 
-	        reveal('.entity-editor-pane',
-	            helpString('intro.areas.describe_playground', { button: icon('#iD-icon-close', 'pre-text') }),
-	            { duration: 300 }
-	        );
+	function uiIntroLine(context, reveal) {
+	  var dispatch = dispatch$8('done');
+	  var timeouts = [];
+	  var _tulipRoadID = null;
+	  var flowerRoadID = 'w646';
+	  var tulipRoadStart = [-85.6297754121684, 41.95805253325314];
+	  var tulipRoadMidpoint = [-85.62975395449628, 41.95787501510204];
+	  var tulipRoadIntersection = [-85.62974496187628, 41.95742515554585];
+	  var roadCategory = _mainPresetIndex.item('category-road_minor');
+	  var residentialPreset = _mainPresetIndex.item('highway/residential');
+	  var woodRoadID = 'w525';
+	  var woodRoadEndID = 'n2862';
+	  var woodRoadAddNode = [-85.62390110349587, 41.95397111462291];
+	  var woodRoadDragEndpoint = [-85.623867390213, 41.95466987786487];
+	  var woodRoadDragMidpoint = [-85.62386254803509, 41.95430395953872];
+	  var washingtonStreetID = 'w522';
+	  var twelfthAvenueID = 'w1';
+	  var eleventhAvenueEndID = 'n3550';
+	  var twelfthAvenueEndID = 'n5';
+	  var _washingtonSegmentID = null;
+	  var eleventhAvenueEnd = context.entity(eleventhAvenueEndID).loc;
+	  var twelfthAvenueEnd = context.entity(twelfthAvenueEndID).loc;
+	  var deleteLinesLoc = [-85.6219395542764, 41.95228033922477];
+	  var twelfthAvenue = [-85.62219310052491, 41.952505413152956];
+	  var chapter = {
+	    title: 'intro.lines.title'
+	  };
+
+	  function timeout(f, t) {
+	    timeouts.push(window.setTimeout(f, t));
+	  }
+
+	  function eventCancel(d3_event) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	  }
+
+	  function addLine() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    var msec = transitionTime(tulipRoadStart, context.map().center());
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
 	    }
 
+	    context.map().centerZoomEase(tulipRoadStart, 18.5, msec);
+	    timeout(function () {
+	      var tooltip = reveal('button.add-line', helpHtml('intro.lines.add_line'));
+	      tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-lines');
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'add-line') return;
+	        continueTo(startLine);
+	      });
+	    }, msec + 100);
+
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
+
+	  function startLine() {
+	    if (context.mode().id !== 'add-line') return chapter.restart();
+	    _tulipRoadID = null;
+	    var padding = 70 * Math.pow(2, context.map().zoom() - 18);
+	    var box = pad(tulipRoadStart, padding, context);
+	    box.height = box.height + 100;
+	    var textId = context.lastPointerType() === 'mouse' ? 'start_line' : 'start_line_tap';
+	    var startLineString = helpHtml('intro.lines.missing_road') + '{br}' + helpHtml('intro.lines.line_draw_info') + helpHtml('intro.lines.' + textId);
+	    reveal(box, startLineString);
+	    context.map().on('move.intro drawn.intro', function () {
+	      padding = 70 * Math.pow(2, context.map().zoom() - 18);
+	      box = pad(tulipRoadStart, padding, context);
+	      box.height = box.height + 100;
+	      reveal(box, startLineString, {
+	        duration: 0
+	      });
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id !== 'draw-line') return chapter.restart();
+	      continueTo(drawLine);
+	    });
 
-	    function retryChooseDescription() {
-	        if (!_areaID || !context.hasEntity(_areaID)) {
-	            return addArea();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-	            return searchPresets();
-	        }
-
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
-
-	        reveal('.entity-editor-pane',
-	            helpString('intro.areas.retry_add_field', { field: descriptionField.label() }), {
-	            buttonText: _t('intro.ok'),
-	            buttonCallback: function() { continueTo(clickAddField); }
-	        });
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context.on('exit.intro', function() {
-	            return continueTo(searchPresets);
+	  function drawLine() {
+	    if (context.mode().id !== 'draw-line') return chapter.restart();
+	    _tulipRoadID = context.mode().selectedIDs()[0];
+	    context.map().centerEase(tulipRoadMidpoint, 500);
+	    timeout(function () {
+	      var padding = 200 * Math.pow(2, context.map().zoom() - 18.5);
+	      var box = pad(tulipRoadMidpoint, padding, context);
+	      box.height = box.height * 2;
+	      reveal(box, helpHtml('intro.lines.intersect', {
+	        name: _t('intro.graph.name.flower-street')
+	      }));
+	      context.map().on('move.intro drawn.intro', function () {
+	        padding = 200 * Math.pow(2, context.map().zoom() - 18.5);
+	        box = pad(tulipRoadMidpoint, padding, context);
+	        box.height = box.height * 2;
+	        reveal(box, helpHtml('intro.lines.intersect', {
+	          name: _t('intro.graph.name.flower-street')
+	        }), {
+	          duration: 0
 	        });
+	      });
+	    }, 550); // after easing..
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
-	    }
-
+	    context.history().on('change.intro', function () {
+	      if (isLineConnected()) {
+	        continueTo(continueLine);
+	      }
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id === 'draw-line') {
+	        return;
+	      } else if (mode.id === 'select') {
+	        continueTo(retryIntersect);
+	        return;
+	      } else {
+	        return chapter.restart();
+	      }
+	    });
 
-	    function play() {
-	        dispatch$1.call('done');
-	        reveal('.ideditor',
-	            helpString('intro.areas.play', { next: _t('intro.lines.title') }), {
-	                tooltipBox: '.intro-nav-wrap .chapter-line',
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { reveal('.ideditor'); }
-	            }
-	        );
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function isLineConnected() {
+	    var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
 
-	    chapter.enter = function() {
-	        addArea();
-	    };
-
-
-	    chapter.exit = function() {
-	        timeouts.forEach(window.clearTimeout);
-	        context.on('enter.intro exit.intro', null);
-	        context.map().on('move.intro drawn.intro', null);
-	        context.history().on('change.intro', null);
-	        context.container().select('.inspector-wrap').on('wheel.intro', null);
-	        context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-	        context.container().select('.more-fields .combobox-input').on('click.intro', null);
-	    };
+	    if (!entity) return false;
+	    var drawNodes = context.graph().childNodes(entity);
+	    return drawNodes.some(function (node) {
+	      return context.graph().parentWays(node).some(function (parent) {
+	        return parent.id === flowerRoadID;
+	      });
+	    });
+	  }
 
+	  function retryIntersect() {
+	    select(window).on('pointerdown.intro mousedown.intro', eventCancel, true);
+	    var box = pad(tulipRoadIntersection, 80, context);
+	    reveal(box, helpHtml('intro.lines.retry_intersect', {
+	      name: _t('intro.graph.name.flower-street')
+	    }));
+	    timeout(chapter.restart, 3000);
+	  }
 
-	    chapter.restart = function() {
-	        chapter.exit();
-	        chapter.enter();
-	    };
+	  function continueLine() {
+	    if (context.mode().id !== 'draw-line') return chapter.restart();
 
+	    var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
 
-	    return utilRebind(chapter, dispatch$1, 'on');
-	}
+	    if (!entity) return chapter.restart();
+	    context.map().centerEase(tulipRoadIntersection, 500);
+	    var continueLineText = helpHtml('intro.lines.continue_line') + '{br}' + helpHtml('intro.lines.finish_line_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.lines.finish_road');
+	    reveal('.surface', continueLineText);
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id === 'draw-line') {
+	        return;
+	      } else if (mode.id === 'select') {
+	        return continueTo(chooseCategoryRoad);
+	      } else {
+	        return chapter.restart();
+	      }
+	    });
 
-	function uiIntroLine(context, reveal) {
-	    var dispatch$1 = dispatch('done');
-	    var timeouts = [];
-	    var _tulipRoadID = null;
-	    var flowerRoadID = 'w646';
-	    var tulipRoadStart = [-85.6297754121684, 41.95805253325314];
-	    var tulipRoadMidpoint = [-85.62975395449628, 41.95787501510204];
-	    var tulipRoadIntersection = [-85.62974496187628, 41.95742515554585];
-	    var roadCategory = _mainPresetIndex.item('category-road_minor');
-	    var residentialPreset = _mainPresetIndex.item('highway/residential');
-	    var woodRoadID = 'w525';
-	    var woodRoadEndID = 'n2862';
-	    var woodRoadAddNode = [-85.62390110349587, 41.95397111462291];
-	    var woodRoadDragEndpoint = [-85.623867390213, 41.95466987786487];
-	    var woodRoadDragMidpoint = [-85.62386254803509, 41.95430395953872];
-	    var washingtonStreetID = 'w522';
-	    var twelfthAvenueID = 'w1';
-	    var eleventhAvenueEndID = 'n3550';
-	    var twelfthAvenueEndID = 'n5';
-	    var _washingtonSegmentID = null;
-	    var eleventhAvenueEnd = context.entity(eleventhAvenueEndID).loc;
-	    var twelfthAvenueEnd = context.entity(twelfthAvenueEndID).loc;
-	    var deleteLinesLoc = [-85.6219395542764, 41.95228033922477];
-	    var twelfthAvenue = [-85.62219310052491, 41.952505413152956];
-
-
-	    var chapter = {
-	        title: 'intro.lines.title'
-	    };
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
+	  function chooseCategoryRoad() {
+	    if (context.mode().id !== 'select') return chapter.restart();
+	    context.on('exit.intro', function () {
+	      return chapter.restart();
+	    });
+	    var button = context.container().select('.preset-category-road_minor .preset-list-button');
+	    if (button.empty()) return chapter.restart(); // disallow scrolling
+
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    timeout(function () {
+	      // reset pane, in case user somehow happened to change it..
+	      context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	      reveal(button.node(), helpHtml('intro.lines.choose_category_road', {
+	        category: roadCategory.name()
+	      }));
+	      button.on('click.intro', function () {
+	        continueTo(choosePresetResidential);
+	      });
+	    }, 400); // after editor pane visible
 
-	    function timeout(f, t) {
-	        timeouts.push(window.setTimeout(f, t));
+	    function continueTo(nextStep) {
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      context.container().select('.preset-list-button').on('click.intro', null);
+	      context.on('exit.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function choosePresetResidential() {
+	    if (context.mode().id !== 'select') return chapter.restart();
+	    context.on('exit.intro', function () {
+	      return chapter.restart();
+	    });
+	    var subgrid = context.container().select('.preset-category-road_minor .subgrid');
+	    if (subgrid.empty()) return chapter.restart();
+	    subgrid.selectAll(':not(.preset-highway-residential) .preset-list-button').on('click.intro', function () {
+	      continueTo(retryPresetResidential);
+	    });
+	    subgrid.selectAll('.preset-highway-residential .preset-list-button').on('click.intro', function () {
+	      continueTo(nameRoad);
+	    });
+	    timeout(function () {
+	      reveal(subgrid.node(), helpHtml('intro.lines.choose_preset_residential', {
+	        preset: residentialPreset.name()
+	      }), {
+	        tooltipBox: '.preset-highway-residential .preset-list-button',
+	        duration: 300
+	      });
+	    }, 300);
 
-	    function eventCancel() {
-	        event.stopPropagation();
-	        event.preventDefault();
+	    function continueTo(nextStep) {
+	      context.container().select('.preset-list-button').on('click.intro', null);
+	      context.on('exit.intro', null);
+	      nextStep();
 	    }
+	  } // selected wrong road type
 
 
-	    function addLine() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');
+	  function retryPresetResidential() {
+	    if (context.mode().id !== 'select') return chapter.restart();
+	    context.on('exit.intro', function () {
+	      return chapter.restart();
+	    }); // disallow scrolling
 
-	        var msec = transitionTime(tulipRoadStart, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(tulipRoadStart, 18.5, msec);
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    timeout(function () {
+	      var button = context.container().select('.entity-editor-pane .preset-list-button');
+	      reveal(button.node(), helpHtml('intro.lines.retry_preset_residential', {
+	        preset: residentialPreset.name()
+	      }));
+	      button.on('click.intro', function () {
+	        continueTo(chooseCategoryRoad);
+	      });
+	    }, 500);
 
-	        timeout(function() {
-	            var tooltip = reveal('button.add-line',
-	                helpString('intro.lines.add_line'));
+	    function continueTo(nextStep) {
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      context.container().select('.preset-list-button').on('click.intro', null);
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            tooltip.selectAll('.popover-inner')
-	                .insert('svg', 'span')
-	                .attr('class', 'tooltip-illustration')
-	                .append('use')
-	                .attr('xlink:href', '#iD-graphic-lines');
+	  function nameRoad() {
+	    context.on('exit.intro', function () {
+	      continueTo(didNameRoad);
+	    });
+	    timeout(function () {
+	      reveal('.entity-editor-pane', helpHtml('intro.lines.name_road', {
+	        button: icon('#iD-icon-close', 'inline')
+	      }), {
+	        tooltipClass: 'intro-lines-name_road'
+	      });
+	    }, 500);
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'add-line') { return; }
-	                continueTo(startLine);
-	            });
-	        }, msec + 100);
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            nextStep();
+	  function didNameRoad() {
+	    context.history().checkpoint('doneAddLine');
+	    timeout(function () {
+	      reveal('.surface', helpHtml('intro.lines.did_name_road'), {
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: function buttonCallback() {
+	          continueTo(updateLine);
 	        }
+	      });
+	    }, 500);
+
+	    function continueTo(nextStep) {
+	      nextStep();
 	    }
+	  }
 
+	  function updateLine() {
+	    context.history().reset('doneAddLine');
 
-	    function startLine() {
-	        if (context.mode().id !== 'add-line') { return chapter.restart(); }
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return chapter.restart();
+	    }
 
-	        _tulipRoadID = null;
+	    var msec = transitionTime(woodRoadDragMidpoint, context.map().center());
 
-	        var padding = 70 * Math.pow(2, context.map().zoom() - 18);
-	        var box = pad(tulipRoadStart, padding, context);
-	        box.height = box.height + 100;
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
-	        var textId = context.lastPointerType() === 'mouse' ? 'start_line' : 'start_line_tap';
-	        var startLineString = helpString('intro.lines.missing_road') + '{br}' +
-	            helpString('intro.lines.line_draw_info') +
-	            helpString('intro.lines.' + textId);
-	        reveal(box, startLineString);
+	    context.map().centerZoomEase(woodRoadDragMidpoint, 19, msec);
+	    timeout(function () {
+	      var padding = 250 * Math.pow(2, context.map().zoom() - 19);
+	      var box = pad(woodRoadDragMidpoint, padding, context);
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            padding = 70 * Math.pow(2, context.map().zoom() - 18);
-	            box = pad(tulipRoadStart, padding, context);
-	            box.height = box.height + 100;
-	            reveal(box, startLineString, { duration: 0 });
-	        });
+	      var advance = function advance() {
+	        continueTo(addNode);
+	      };
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id !== 'draw-line') { return chapter.restart(); }
-	            continueTo(drawLine);
+	      reveal(box, helpHtml('intro.lines.update_line'), {
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: advance
+	      });
+	      context.map().on('move.intro drawn.intro', function () {
+	        var padding = 250 * Math.pow(2, context.map().zoom() - 19);
+	        var box = pad(woodRoadDragMidpoint, padding, context);
+	        reveal(box, helpHtml('intro.lines.update_line'), {
+	          duration: 0,
+	          buttonText: _t.html('intro.ok'),
+	          buttonCallback: advance
 	        });
+	      });
+	    }, msec + 100);
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function addNode() {
+	    context.history().reset('doneAddLine');
 
-	    function drawLine() {
-	        if (context.mode().id !== 'draw-line') { return chapter.restart(); }
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return chapter.restart();
+	    }
 
-	        _tulipRoadID = context.mode().selectedIDs()[0];
-	        context.map().centerEase(tulipRoadMidpoint, 500);
+	    var padding = 40 * Math.pow(2, context.map().zoom() - 19);
+	    var box = pad(woodRoadAddNode, padding, context);
+	    var addNodeString = helpHtml('intro.lines.add_node' + (context.lastPointerType() === 'mouse' ? '' : '_touch'));
+	    reveal(box, addNodeString);
+	    context.map().on('move.intro drawn.intro', function () {
+	      var padding = 40 * Math.pow(2, context.map().zoom() - 19);
+	      var box = pad(woodRoadAddNode, padding, context);
+	      reveal(box, addNodeString, {
+	        duration: 0
+	      });
+	    });
+	    context.history().on('change.intro', function (changed) {
+	      if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	        return continueTo(updateLine);
+	      }
 
-	        timeout(function() {
-	            var padding = 200 * Math.pow(2, context.map().zoom() - 18.5);
-	            var box = pad(tulipRoadMidpoint, padding, context);
-	            box.height = box.height * 2;
-	            reveal(box,
-	                helpString('intro.lines.intersect', { name: _t('intro.graph.name.flower-street') })
-	            );
+	      if (changed.created().length === 1) {
+	        timeout(function () {
+	          continueTo(startDragEndpoint);
+	        }, 500);
+	      }
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id !== 'select') {
+	        continueTo(updateLine);
+	      }
+	    });
 
-	            context.map().on('move.intro drawn.intro', function() {
-	                padding = 200 * Math.pow(2, context.map().zoom() - 18.5);
-	                box = pad(tulipRoadMidpoint, padding, context);
-	                box.height = box.height * 2;
-	                reveal(box,
-	                    helpString('intro.lines.intersect', { name: _t('intro.graph.name.flower-street') }),
-	                    { duration: 0 }
-	                );
-	            });
-	        }, 550);  // after easing..
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context.history().on('change.intro', function() {
-	            if (isLineConnected()) {
-	                continueTo(continueLine);
-	            }
-	        });
+	  function startDragEndpoint() {
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return continueTo(updateLine);
+	    }
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'draw-line') {
-	                return;
-	            } else if (mode.id === 'select') {
-	                continueTo(retryIntersect);
-	                return;
-	            } else {
-	                return chapter.restart();
-	            }
-	        });
+	    var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+	    var box = pad(woodRoadDragEndpoint, padding, context);
+	    var startDragString = helpHtml('intro.lines.start_drag_endpoint' + (context.lastPointerType() === 'mouse' ? '' : '_touch')) + helpHtml('intro.lines.drag_to_intersection');
+	    reveal(box, startDragString);
+	    context.map().on('move.intro drawn.intro', function () {
+	      if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	        return continueTo(updateLine);
+	      }
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	      var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+	      var box = pad(woodRoadDragEndpoint, padding, context);
+	      reveal(box, startDragString, {
+	        duration: 0
+	      });
+	      var entity = context.entity(woodRoadEndID);
 
+	      if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) <= 4) {
+	        continueTo(finishDragEndpoint);
+	      }
+	    });
 
-	    function isLineConnected() {
-	        var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
-	        if (!entity) { return false; }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        var drawNodes = context.graph().childNodes(entity);
-	        return drawNodes.some(function(node) {
-	            return context.graph().parentWays(node).some(function(parent) {
-	                return parent.id === flowerRoadID;
-	            });
-	        });
+	  function finishDragEndpoint() {
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return continueTo(updateLine);
 	    }
 
+	    var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+	    var box = pad(woodRoadDragEndpoint, padding, context);
+	    var finishDragString = helpHtml('intro.lines.spot_looks_good') + helpHtml('intro.lines.finish_drag_endpoint' + (context.lastPointerType() === 'mouse' ? '' : '_touch'));
+	    reveal(box, finishDragString);
+	    context.map().on('move.intro drawn.intro', function () {
+	      if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	        return continueTo(updateLine);
+	      }
 
-	    function retryIntersect() {
-	        select(window).on('pointerdown.intro mousedown.intro', eventCancel, true);
+	      var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+	      var box = pad(woodRoadDragEndpoint, padding, context);
+	      reveal(box, finishDragString, {
+	        duration: 0
+	      });
+	      var entity = context.entity(woodRoadEndID);
 
-	        var box = pad(tulipRoadIntersection, 80, context);
-	        reveal(box,
-	            helpString('intro.lines.retry_intersect', { name: _t('intro.graph.name.flower-street') })
-	        );
+	      if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) > 4) {
+	        continueTo(startDragEndpoint);
+	      }
+	    });
+	    context.on('enter.intro', function () {
+	      continueTo(startDragMidpoint);
+	    });
 
-	        timeout(chapter.restart, 3000);
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function startDragMidpoint() {
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return continueTo(updateLine);
+	    }
 
-	    function continueLine() {
-	        if (context.mode().id !== 'draw-line') { return chapter.restart(); }
-	        var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
-	        if (!entity) { return chapter.restart(); }
-
-	        context.map().centerEase(tulipRoadIntersection, 500);
-
-	        var continueLineText = helpString('intro.lines.continue_line') + '{br}' +
-	            helpString('intro.lines.finish_line_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) +
-	            helpString('intro.lines.finish_road');
+	    if (context.selectedIDs().indexOf(woodRoadID) === -1) {
+	      context.enter(modeSelect(context, [woodRoadID]));
+	    }
 
-	        reveal('.surface', continueLineText);
+	    var padding = 80 * Math.pow(2, context.map().zoom() - 19);
+	    var box = pad(woodRoadDragMidpoint, padding, context);
+	    reveal(box, helpHtml('intro.lines.start_drag_midpoint'));
+	    context.map().on('move.intro drawn.intro', function () {
+	      if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	        return continueTo(updateLine);
+	      }
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'draw-line')
-	                { return; }
-	            else if (mode.id === 'select')
-	                { return continueTo(chooseCategoryRoad); }
-	            else
-	                { return chapter.restart(); }
-	        });
+	      var padding = 80 * Math.pow(2, context.map().zoom() - 19);
+	      var box = pad(woodRoadDragMidpoint, padding, context);
+	      reveal(box, helpHtml('intro.lines.start_drag_midpoint'), {
+	        duration: 0
+	      });
+	    });
+	    context.history().on('change.intro', function (changed) {
+	      if (changed.created().length === 1) {
+	        continueTo(continueDragMidpoint);
+	      }
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id !== 'select') {
+	        // keep Wood Road selected so midpoint triangles are drawn..
+	        context.enter(modeSelect(context, [woodRoadID]));
+	      }
+	    });
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function continueDragMidpoint() {
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return continueTo(updateLine);
+	    }
 
-	    function chooseCategoryRoad() {
-	        if (context.mode().id !== 'select') { return chapter.restart(); }
+	    var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+	    var box = pad(woodRoadDragEndpoint, padding, context);
+	    box.height += 400;
 
-	        context.on('exit.intro', function() {
-	            return chapter.restart();
-	        });
+	    var advance = function advance() {
+	      context.history().checkpoint('doneUpdateLine');
+	      continueTo(deleteLines);
+	    };
 
-	        var button = context.container().select('.preset-category-road_minor .preset-list-button');
-	        if (button.empty()) { return chapter.restart(); }
+	    reveal(box, helpHtml('intro.lines.continue_drag_midpoint'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: advance
+	    });
+	    context.map().on('move.intro drawn.intro', function () {
+	      if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	        return continueTo(updateLine);
+	      }
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	      var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+	      var box = pad(woodRoadDragEndpoint, padding, context);
+	      box.height += 400;
+	      reveal(box, helpHtml('intro.lines.continue_drag_midpoint'), {
+	        duration: 0,
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: advance
+	      });
+	    });
 
-	        timeout(function() {
-	            // reset pane, in case user somehow happened to change it..
-	            context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            reveal(button.node(),
-	                helpString('intro.lines.choose_category_road', { category: roadCategory.name() })
-	            );
+	  function deleteLines() {
+	    context.history().reset('doneUpdateLine');
+	    context.enter(modeBrowse(context));
 
-	            button.on('click.intro', function() {
-	                continueTo(choosePresetResidential);
-	            });
+	    if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return chapter.restart();
+	    }
 
-	        }, 400);  // after editor pane visible
+	    var msec = transitionTime(deleteLinesLoc, context.map().center());
 
-	        function continueTo(nextStep) {
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            context.container().select('.preset-list-button').on('click.intro', null);
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
 	    }
 
+	    context.map().centerZoomEase(deleteLinesLoc, 18, msec);
+	    timeout(function () {
+	      var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	      var box = pad(deleteLinesLoc, padding, context);
+	      box.top -= 200;
+	      box.height += 400;
 
-	    function choosePresetResidential() {
-	        if (context.mode().id !== 'select') { return chapter.restart(); }
+	      var advance = function advance() {
+	        continueTo(rightClickIntersection);
+	      };
 
-	        context.on('exit.intro', function() {
-	            return chapter.restart();
+	      reveal(box, helpHtml('intro.lines.delete_lines', {
+	        street: _t('intro.graph.name.12th-avenue')
+	      }), {
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: advance
+	      });
+	      context.map().on('move.intro drawn.intro', function () {
+	        var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	        var box = pad(deleteLinesLoc, padding, context);
+	        box.top -= 200;
+	        box.height += 400;
+	        reveal(box, helpHtml('intro.lines.delete_lines', {
+	          street: _t('intro.graph.name.12th-avenue')
+	        }), {
+	          duration: 0,
+	          buttonText: _t.html('intro.ok'),
+	          buttonCallback: advance
 	        });
+	      });
+	      context.history().on('change.intro', function () {
+	        timeout(function () {
+	          continueTo(deleteLines);
+	        }, 500); // after any transition (e.g. if user deleted intersection)
+	      });
+	    }, msec + 100);
 
-	        var subgrid = context.container().select('.preset-category-road_minor .subgrid');
-	        if (subgrid.empty()) { return chapter.restart(); }
-
-	        subgrid.selectAll(':not(.preset-highway-residential) .preset-list-button')
-	            .on('click.intro', function() {
-	                continueTo(retryPresetResidential);
-	            });
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        subgrid.selectAll('.preset-highway-residential .preset-list-button')
-	            .on('click.intro', function() {
-	                continueTo(nameRoad);
-	            });
+	  function rightClickIntersection() {
+	    context.history().reset('doneUpdateLine');
+	    context.enter(modeBrowse(context));
+	    context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
+	    var rightClickString = helpHtml('intro.lines.split_street', {
+	      street1: _t('intro.graph.name.11th-avenue'),
+	      street2: _t('intro.graph.name.washington-street')
+	    }) + helpHtml('intro.lines.' + (context.lastPointerType() === 'mouse' ? 'rightclick_intersection' : 'edit_menu_intersection_touch'));
+	    timeout(function () {
+	      var padding = 60 * Math.pow(2, context.map().zoom() - 18);
+	      var box = pad(eleventhAvenueEnd, padding, context);
+	      reveal(box, rightClickString);
+	      context.map().on('move.intro drawn.intro', function () {
+	        var padding = 60 * Math.pow(2, context.map().zoom() - 18);
+	        var box = pad(eleventhAvenueEnd, padding, context);
+	        reveal(box, rightClickString, {
+	          duration: 0
+	        });
+	      });
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'select') return;
+	        var ids = context.selectedIDs();
+	        if (ids.length !== 1 || ids[0] !== eleventhAvenueEndID) return;
+	        timeout(function () {
+	          var node = selectMenuItem(context, 'split').node();
+	          if (!node) return;
+	          continueTo(splitIntersection);
+	        }, 50); // after menu visible
+	      });
+	      context.history().on('change.intro', function () {
+	        timeout(function () {
+	          continueTo(deleteLines);
+	        }, 300); // after any transition (e.g. if user deleted intersection)
+	      });
+	    }, 600);
 
-	        timeout(function() {
-	            reveal(subgrid.node(),
-	                helpString('intro.lines.choose_preset_residential', { preset: residentialPreset.name() }),
-	                { tooltipBox: '.preset-highway-residential .preset-list-button', duration: 300 }
-	            );
-	        }, 300);
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        function continueTo(nextStep) {
-	            context.container().select('.preset-list-button').on('click.intro', null);
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	  function splitIntersection() {
+	    if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return continueTo(deleteLines);
 	    }
 
+	    var node = selectMenuItem(context, 'split').node();
 
-	    // selected wrong road type
-	    function retryPresetResidential() {
-	        if (context.mode().id !== 'select') { return chapter.restart(); }
+	    if (!node) {
+	      return continueTo(rightClickIntersection);
+	    }
 
-	        context.on('exit.intro', function() {
-	            return chapter.restart();
-	        });
+	    var wasChanged = false;
+	    _washingtonSegmentID = null;
+	    reveal('.edit-menu', helpHtml('intro.lines.split_intersection', {
+	      street: _t('intro.graph.name.washington-street')
+	    }), {
+	      padding: 50
+	    });
+	    context.map().on('move.intro drawn.intro', function () {
+	      var node = selectMenuItem(context, 'split').node();
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	      if (!wasChanged && !node) {
+	        return continueTo(rightClickIntersection);
+	      }
+
+	      reveal('.edit-menu', helpHtml('intro.lines.split_intersection', {
+	        street: _t('intro.graph.name.washington-street')
+	      }), {
+	        duration: 0,
+	        padding: 50
+	      });
+	    });
+	    context.history().on('change.intro', function (changed) {
+	      wasChanged = true;
+	      timeout(function () {
+	        if (context.history().undoAnnotation() === _t('operations.split.annotation.line', {
+	          n: 1
+	        })) {
+	          _washingtonSegmentID = changed.created()[0].id;
+	          continueTo(didSplit);
+	        } else {
+	          _washingtonSegmentID = null;
+	          continueTo(retrySplit);
+	        }
+	      }, 300); // after any transition (e.g. if user deleted intersection)
+	    });
 
-	        timeout(function() {
-	            var button = context.container().select('.entity-editor-pane .preset-list-button');
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            reveal(button.node(),
-	                helpString('intro.lines.retry_preset_residential', { preset: residentialPreset.name() })
-	            );
+	  function retrySplit() {
+	    context.enter(modeBrowse(context));
+	    context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
 
-	            button.on('click.intro', function() {
-	                continueTo(chooseCategoryRoad);
-	            });
+	    var advance = function advance() {
+	      continueTo(rightClickIntersection);
+	    };
 
-	        }, 500);
+	    var padding = 60 * Math.pow(2, context.map().zoom() - 18);
+	    var box = pad(eleventhAvenueEnd, padding, context);
+	    reveal(box, helpHtml('intro.lines.retry_split'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: advance
+	    });
+	    context.map().on('move.intro drawn.intro', function () {
+	      var padding = 60 * Math.pow(2, context.map().zoom() - 18);
+	      var box = pad(eleventhAvenueEnd, padding, context);
+	      reveal(box, helpHtml('intro.lines.retry_split'), {
+	        duration: 0,
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: advance
+	      });
+	    });
 
-	        function continueTo(nextStep) {
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            context.container().select('.preset-list-button').on('click.intro', null);
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function didSplit() {
+	    if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return continueTo(rightClickIntersection);
+	    }
 
-	    function nameRoad() {
-	        context.on('exit.intro', function() {
-	            continueTo(didNameRoad);
+	    var ids = context.selectedIDs();
+	    var string = 'intro.lines.did_split_' + (ids.length > 1 ? 'multi' : 'single');
+	    var street = _t('intro.graph.name.washington-street');
+	    var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	    var box = pad(twelfthAvenue, padding, context);
+	    box.width = box.width / 2;
+	    reveal(box, helpHtml(string, {
+	      street1: street,
+	      street2: street
+	    }), {
+	      duration: 500
+	    });
+	    timeout(function () {
+	      context.map().centerZoomEase(twelfthAvenue, 18, 500);
+	      context.map().on('move.intro drawn.intro', function () {
+	        var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	        var box = pad(twelfthAvenue, padding, context);
+	        box.width = box.width / 2;
+	        reveal(box, helpHtml(string, {
+	          street1: street,
+	          street2: street
+	        }), {
+	          duration: 0
 	        });
+	      });
+	    }, 600); // after initial reveal and curtain cut
 
-	        timeout(function() {
-	            reveal('.entity-editor-pane',
-	                helpString('intro.lines.name_road', { button: icon('#iD-icon-close', 'pre-text') }),
-	                { tooltipClass: 'intro-lines-name_road' }
-	            );
-	        }, 500);
+	    context.on('enter.intro', function () {
+	      var ids = context.selectedIDs();
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	      if (ids.length === 1 && ids[0] === _washingtonSegmentID) {
+	        continueTo(multiSelect);
+	      }
+	    });
+	    context.history().on('change.intro', function () {
+	      if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	        return continueTo(rightClickIntersection);
+	      }
+	    });
+
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function multiSelect() {
+	    if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return continueTo(rightClickIntersection);
+	    }
 
-	    function didNameRoad() {
-	        context.history().checkpoint('doneAddLine');
+	    var ids = context.selectedIDs();
+	    var hasWashington = ids.indexOf(_washingtonSegmentID) !== -1;
+	    var hasTwelfth = ids.indexOf(twelfthAvenueID) !== -1;
 
-	        timeout(function() {
-	            reveal('.surface', helpString('intro.lines.did_name_road'), {
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { continueTo(updateLine); }
-	            });
-	        }, 500);
+	    if (hasWashington && hasTwelfth) {
+	      return continueTo(multiRightClick);
+	    } else if (!hasWashington && !hasTwelfth) {
+	      return continueTo(didSplit);
+	    }
+
+	    context.map().centerZoomEase(twelfthAvenue, 18, 500);
+	    timeout(function () {
+	      var selected, other, padding, box;
+
+	      if (hasWashington) {
+	        selected = _t('intro.graph.name.washington-street');
+	        other = _t('intro.graph.name.12th-avenue');
+	        padding = 60 * Math.pow(2, context.map().zoom() - 18);
+	        box = pad(twelfthAvenueEnd, padding, context);
+	        box.width *= 3;
+	      } else {
+	        selected = _t('intro.graph.name.12th-avenue');
+	        other = _t('intro.graph.name.washington-street');
+	        padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	        box = pad(twelfthAvenue, padding, context);
+	        box.width /= 2;
+	      }
 
-	        function continueTo(nextStep) {
-	            nextStep();
+	      reveal(box, helpHtml('intro.lines.multi_select', {
+	        selected: selected,
+	        other1: other
+	      }) + ' ' + helpHtml('intro.lines.add_to_selection_' + (context.lastPointerType() === 'mouse' ? 'click' : 'touch'), {
+	        selected: selected,
+	        other2: other
+	      }));
+	      context.map().on('move.intro drawn.intro', function () {
+	        if (hasWashington) {
+	          selected = _t('intro.graph.name.washington-street');
+	          other = _t('intro.graph.name.12th-avenue');
+	          padding = 60 * Math.pow(2, context.map().zoom() - 18);
+	          box = pad(twelfthAvenueEnd, padding, context);
+	          box.width *= 3;
+	        } else {
+	          selected = _t('intro.graph.name.12th-avenue');
+	          other = _t('intro.graph.name.washington-street');
+	          padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	          box = pad(twelfthAvenue, padding, context);
+	          box.width /= 2;
+	        }
+
+	        reveal(box, helpHtml('intro.lines.multi_select', {
+	          selected: selected,
+	          other1: other
+	        }) + ' ' + helpHtml('intro.lines.add_to_selection_' + (context.lastPointerType() === 'mouse' ? 'click' : 'touch'), {
+	          selected: selected,
+	          other2: other
+	        }), {
+	          duration: 0
+	        });
+	      });
+	      context.on('enter.intro', function () {
+	        continueTo(multiSelect);
+	      });
+	      context.history().on('change.intro', function () {
+	        if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	          return continueTo(rightClickIntersection);
 	        }
+	      });
+	    }, 600);
+
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
+
+	  function multiRightClick() {
+	    if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return continueTo(rightClickIntersection);
 	    }
 
+	    var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	    var box = pad(twelfthAvenue, padding, context);
+	    var rightClickString = helpHtml('intro.lines.multi_select_success') + helpHtml('intro.lines.multi_' + (context.lastPointerType() === 'mouse' ? 'rightclick' : 'edit_menu_touch'));
+	    reveal(box, rightClickString);
+	    context.map().on('move.intro drawn.intro', function () {
+	      var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	      var box = pad(twelfthAvenue, padding, context);
+	      reveal(box, rightClickString, {
+	        duration: 0
+	      });
+	    });
+	    context.ui().editMenu().on('toggled.intro', function (open) {
+	      if (!open) return;
+	      timeout(function () {
+	        var ids = context.selectedIDs();
 
-	    function updateLine() {
-	        context.history().reset('doneAddLine');
-	        if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	            return chapter.restart();
+	        if (ids.length === 2 && ids.indexOf(twelfthAvenueID) !== -1 && ids.indexOf(_washingtonSegmentID) !== -1) {
+	          var node = selectMenuItem(context, 'delete').node();
+	          if (!node) return;
+	          continueTo(multiDelete);
+	        } else if (ids.length === 1 && ids.indexOf(_washingtonSegmentID) !== -1) {
+	          return continueTo(multiSelect);
+	        } else {
+	          return continueTo(didSplit);
 	        }
+	      }, 300); // after edit menu visible
+	    });
+	    context.history().on('change.intro', function () {
+	      if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	        return continueTo(rightClickIntersection);
+	      }
+	    });
+
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.ui().editMenu().on('toggled.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        var msec = transitionTime(woodRoadDragMidpoint, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(woodRoadDragMidpoint, 19, msec);
+	  function multiDelete() {
+	    if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return continueTo(rightClickIntersection);
+	    }
 
-	        timeout(function() {
-	            var padding = 250 * Math.pow(2, context.map().zoom() - 19);
-	            var box = pad(woodRoadDragMidpoint, padding, context);
-	            var advance = function() { continueTo(addNode); };
+	    var node = selectMenuItem(context, 'delete').node();
+	    if (!node) return continueTo(multiRightClick);
+	    reveal('.edit-menu', helpHtml('intro.lines.multi_delete'), {
+	      padding: 50
+	    });
+	    context.map().on('move.intro drawn.intro', function () {
+	      reveal('.edit-menu', helpHtml('intro.lines.multi_delete'), {
+	        duration: 0,
+	        padding: 50
+	      });
+	    });
+	    context.on('exit.intro', function () {
+	      if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
+	        return continueTo(multiSelect); // left select mode but roads still exist
+	      }
+	    });
+	    context.history().on('change.intro', function () {
+	      if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
+	        continueTo(retryDelete); // changed something but roads still exist
+	      } else {
+	        continueTo(play);
+	      }
+	    });
 
-	            reveal(box, helpString('intro.lines.update_line'),
-	                { buttonText: _t('intro.ok'), buttonCallback: advance }
-	            );
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            context.map().on('move.intro drawn.intro', function() {
-	                var padding = 250 * Math.pow(2, context.map().zoom() - 19);
-	                var box = pad(woodRoadDragMidpoint, padding, context);
-	                reveal(box, helpString('intro.lines.update_line'),
-	                    { duration: 0, buttonText: _t('intro.ok'), buttonCallback: advance }
-	                );
-	            });
-	        }, msec + 100);
+	  function retryDelete() {
+	    context.enter(modeBrowse(context));
+	    var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	    var box = pad(twelfthAvenue, padding, context);
+	    reveal(box, helpHtml('intro.lines.retry_delete'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        continueTo(multiSelect);
+	      }
+	    });
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      nextStep();
 	    }
+	  }
 
+	  function play() {
+	    dispatch.call('done');
+	    reveal('.ideditor', helpHtml('intro.lines.play', {
+	      next: _t('intro.buildings.title')
+	    }), {
+	      tooltipBox: '.intro-nav-wrap .chapter-building',
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        reveal('.ideditor');
+	      }
+	    });
+	  }
 
-	    function addNode() {
-	        context.history().reset('doneAddLine');
-	        if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	            return chapter.restart();
-	        }
+	  chapter.enter = function () {
+	    addLine();
+	  };
 
-	        var padding = 40 * Math.pow(2, context.map().zoom() - 19);
-	        var box = pad(woodRoadAddNode, padding, context);
-	        var addNodeString = helpString('intro.lines.add_node' + (context.lastPointerType() === 'mouse' ? '' : '_touch'));
-	        reveal(box, addNodeString);
+	  chapter.exit = function () {
+	    timeouts.forEach(window.clearTimeout);
+	    select(window).on('pointerdown.intro mousedown.intro', null, true);
+	    context.on('enter.intro exit.intro', null);
+	    context.map().on('move.intro drawn.intro', null);
+	    context.history().on('change.intro', null);
+	    context.container().select('.inspector-wrap').on('wheel.intro', null);
+	    context.container().select('.preset-list-button').on('click.intro', null);
+	  };
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            var padding = 40 * Math.pow(2, context.map().zoom() - 19);
-	            var box = pad(woodRoadAddNode, padding, context);
-	            reveal(box, addNodeString, { duration: 0 });
-	        });
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	        context.history().on('change.intro', function(changed) {
-	            if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	                return continueTo(updateLine);
-	            }
-	            if (changed.created().length === 1) {
-	                timeout(function() { continueTo(startDragEndpoint); }, 500);
-	            }
-	        });
+	  return utilRebind(chapter, dispatch, 'on');
+	}
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id !== 'select') {
-	                continueTo(updateLine);
-	            }
-	        });
+	function uiIntroBuilding(context, reveal) {
+	  var dispatch = dispatch$8('done');
+	  var house = [-85.62815, 41.95638];
+	  var tank = [-85.62732, 41.95347];
+	  var buildingCatetory = _mainPresetIndex.item('category-building');
+	  var housePreset = _mainPresetIndex.item('building/house');
+	  var tankPreset = _mainPresetIndex.item('man_made/storage_tank');
+	  var timeouts = [];
+	  var _houseID = null;
+	  var _tankID = null;
+	  var chapter = {
+	    title: 'intro.buildings.title'
+	  };
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	  function timeout(f, t) {
+	    timeouts.push(window.setTimeout(f, t));
+	  }
 
+	  function eventCancel(d3_event) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	  }
 
-	    function startDragEndpoint() {
-	        if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	            return continueTo(updateLine);
-	        }
-	        var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-	        var box = pad(woodRoadDragEndpoint, padding, context);
-	        var startDragString = helpString('intro.lines.start_drag_endpoint' + (context.lastPointerType() === 'mouse' ? '' : '_touch')) +
-	            helpString('intro.lines.drag_to_intersection');
-	        reveal(box, startDragString);
+	  function revealHouse(center, text, options) {
+	    var padding = 160 * Math.pow(2, context.map().zoom() - 20);
+	    var box = pad(center, padding, context);
+	    reveal(box, text, options);
+	  }
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	                return continueTo(updateLine);
-	            }
-	            var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-	            var box = pad(woodRoadDragEndpoint, padding, context);
-	            reveal(box, startDragString, { duration: 0 });
+	  function revealTank(center, text, options) {
+	    var padding = 190 * Math.pow(2, context.map().zoom() - 19.5);
+	    var box = pad(center, padding, context);
+	    reveal(box, text, options);
+	  }
 
-	            var entity = context.entity(woodRoadEndID);
-	            if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) <= 4) {
-	                continueTo(finishDragEndpoint);
-	            }
-	        });
+	  function addHouse() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    _houseID = null;
+	    var msec = transitionTime(house, context.map().center());
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
-	        }
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
 	    }
 
+	    context.map().centerZoomEase(house, 19, msec);
+	    timeout(function () {
+	      var tooltip = reveal('button.add-area', helpHtml('intro.buildings.add_building'));
+	      tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-buildings');
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'add-area') return;
+	        continueTo(startHouse);
+	      });
+	    }, msec + 100);
 
-	    function finishDragEndpoint() {
-	        if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	            return continueTo(updateLine);
-	        }
-
-	        var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-	        var box = pad(woodRoadDragEndpoint, padding, context);
-	        var finishDragString = helpString('intro.lines.spot_looks_good') +
-	            helpString('intro.lines.finish_drag_endpoint' + (context.lastPointerType() === 'mouse' ? '' : '_touch'));
-	        reveal(box, finishDragString);
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	                return continueTo(updateLine);
-	            }
-	            var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-	            var box = pad(woodRoadDragEndpoint, padding, context);
-	            reveal(box, finishDragString, { duration: 0 });
+	  function startHouse() {
+	    if (context.mode().id !== 'add-area') {
+	      return continueTo(addHouse);
+	    }
 
-	            var entity = context.entity(woodRoadEndID);
-	            if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) > 4) {
-	                continueTo(startDragEndpoint);
-	            }
+	    _houseID = null;
+	    context.map().zoomEase(20, 500);
+	    timeout(function () {
+	      var startString = helpHtml('intro.buildings.start_building') + helpHtml('intro.buildings.building_corner_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap'));
+	      revealHouse(house, startString);
+	      context.map().on('move.intro drawn.intro', function () {
+	        revealHouse(house, startString, {
+	          duration: 0
 	        });
+	      });
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'draw-area') return chapter.restart();
+	        continueTo(continueHouse);
+	      });
+	    }, 550); // after easing
 
-	        context.on('enter.intro', function() {
-	            continueTo(startDragMidpoint);
-	        });
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	  function continueHouse() {
+	    if (context.mode().id !== 'draw-area') {
+	      return continueTo(addHouse);
 	    }
 
+	    _houseID = null;
+	    var continueString = helpHtml('intro.buildings.continue_building') + '{br}' + helpHtml('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.buildings.finish_building');
+	    revealHouse(house, continueString);
+	    context.map().on('move.intro drawn.intro', function () {
+	      revealHouse(house, continueString, {
+	        duration: 0
+	      });
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id === 'draw-area') {
+	        return;
+	      } else if (mode.id === 'select') {
+	        var graph = context.graph();
+	        var way = context.entity(context.selectedIDs()[0]);
+	        var nodes = graph.childNodes(way);
+	        var points = utilArrayUniq(nodes).map(function (n) {
+	          return context.projection(n.loc);
+	        });
 
-	    function startDragMidpoint() {
-	        if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	            return continueTo(updateLine);
-	        }
-	        if (context.selectedIDs().indexOf(woodRoadID) === -1) {
-	            context.enter(modeSelect(context, [woodRoadID]));
+	        if (isMostlySquare(points)) {
+	          _houseID = way.id;
+	          return continueTo(chooseCategoryBuilding);
+	        } else {
+	          return continueTo(retryHouse);
 	        }
+	      } else {
+	        return chapter.restart();
+	      }
+	    });
 
-	        var padding = 80 * Math.pow(2, context.map().zoom() - 19);
-	        var box = pad(woodRoadDragMidpoint, padding, context);
-	        reveal(box, helpString('intro.lines.start_drag_midpoint'));
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	                return continueTo(updateLine);
-	            }
-	            var padding = 80 * Math.pow(2, context.map().zoom() - 19);
-	            var box = pad(woodRoadDragMidpoint, padding, context);
-	            reveal(box, helpString('intro.lines.start_drag_midpoint'), { duration: 0 });
-	        });
+	  function retryHouse() {
+	    var onClick = function onClick() {
+	      continueTo(addHouse);
+	    };
 
-	        context.history().on('change.intro', function(changed) {
-	            if (changed.created().length === 1) {
-	                continueTo(continueDragMidpoint);
-	            }
-	        });
+	    revealHouse(house, helpHtml('intro.buildings.retry_building'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    context.map().on('move.intro drawn.intro', function () {
+	      revealHouse(house, helpHtml('intro.buildings.retry_building'), {
+	        duration: 0,
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: onClick
+	      });
+	    });
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id !== 'select') {
-	                // keep Wood Road selected so midpoint triangles are drawn..
-	                context.enter(modeSelect(context, [woodRoadID]));
-	            }
-	        });
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	  function chooseCategoryBuilding() {
+	    if (!_houseID || !context.hasEntity(_houseID)) {
+	      return addHouse();
 	    }
 
+	    var ids = context.selectedIDs();
 
-	    function continueDragMidpoint() {
-	        if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	            return continueTo(updateLine);
-	        }
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+	      context.enter(modeSelect(context, [_houseID]));
+	    } // disallow scrolling
 
-	        var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-	        var box = pad(woodRoadDragEndpoint, padding, context);
-	        box.height += 400;
 
-	        var advance = function() {
-	            context.history().checkpoint('doneUpdateLine');
-	            continueTo(deleteLines);
-	        };
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    timeout(function () {
+	      // reset pane, in case user somehow happened to change it..
+	      context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	      var button = context.container().select('.preset-category-building .preset-list-button');
+	      reveal(button.node(), helpHtml('intro.buildings.choose_category_building', {
+	        category: buildingCatetory.name()
+	      }));
+	      button.on('click.intro', function () {
+	        button.on('click.intro', null);
+	        continueTo(choosePresetHouse);
+	      });
+	    }, 400); // after preset list pane visible..
 
-	        reveal(box, helpString('intro.lines.continue_drag_midpoint'),
-	            { buttonText: _t('intro.ok'), buttonCallback: advance }
-	        );
+	    context.on('enter.intro', function (mode) {
+	      if (!_houseID || !context.hasEntity(_houseID)) {
+	        return continueTo(addHouse);
+	      }
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	                return continueTo(updateLine);
-	            }
-	            var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-	            var box = pad(woodRoadDragEndpoint, padding, context);
-	            box.height += 400;
-	            reveal(box, helpString('intro.lines.continue_drag_midpoint'),
-	                { duration: 0, buttonText: _t('intro.ok'), buttonCallback: advance }
-	            );
-	        });
+	      var ids = context.selectedIDs();
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
-	        }
-	    }
+	      if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
+	        return continueTo(chooseCategoryBuilding);
+	      }
+	    });
 
+	    function continueTo(nextStep) {
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      context.container().select('.preset-list-button').on('click.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    function deleteLines() {
-	        context.history().reset('doneUpdateLine');
-	        context.enter(modeBrowse(context));
+	  function choosePresetHouse() {
+	    if (!_houseID || !context.hasEntity(_houseID)) {
+	      return addHouse();
+	    }
 
-	        if (!context.hasEntity(washingtonStreetID) ||
-	            !context.hasEntity(twelfthAvenueID) ||
-	            !context.hasEntity(eleventhAvenueEndID)) {
-	            return chapter.restart();
-	        }
-
-	        var msec = transitionTime(deleteLinesLoc, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(deleteLinesLoc, 18, msec);
-
-	        timeout(function() {
-	            var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	            var box = pad(deleteLinesLoc, padding, context);
-	            box.top -= 200;
-	            box.height += 400;
-	            var advance = function() { continueTo(rightClickIntersection); };
-
-	            reveal(box, helpString('intro.lines.delete_lines', { street: _t('intro.graph.name.12th-avenue') }),
-	                { buttonText: _t('intro.ok'), buttonCallback: advance }
-	            );
-
-	            context.map().on('move.intro drawn.intro', function() {
-	                var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	                var box = pad(deleteLinesLoc, padding, context);
-	                box.top -= 200;
-	                box.height += 400;
-	                reveal(box, helpString('intro.lines.delete_lines', { street: _t('intro.graph.name.12th-avenue') }),
-	                    { duration: 0, buttonText: _t('intro.ok'), buttonCallback: advance }
-	                );
-	            });
+	    var ids = context.selectedIDs();
 
-	            context.history().on('change.intro', function() {
-	                timeout(function() {
-	                    continueTo(deleteLines);
-	                }, 500);  // after any transition (e.g. if user deleted intersection)
-	            });
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+	      context.enter(modeSelect(context, [_houseID]));
+	    } // disallow scrolling
 
-	        }, msec + 100);
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    timeout(function () {
+	      // reset pane, in case user somehow happened to change it..
+	      context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	      var button = context.container().select('.preset-building-house .preset-list-button');
+	      reveal(button.node(), helpHtml('intro.buildings.choose_preset_house', {
+	        preset: housePreset.name()
+	      }), {
+	        duration: 300
+	      });
+	      button.on('click.intro', function () {
+	        button.on('click.intro', null);
+	        continueTo(closeEditorHouse);
+	      });
+	    }, 400); // after preset list pane visible..
 
+	    context.on('enter.intro', function (mode) {
+	      if (!_houseID || !context.hasEntity(_houseID)) {
+	        return continueTo(addHouse);
+	      }
 
-	    function rightClickIntersection() {
-	        context.history().reset('doneUpdateLine');
-	        context.enter(modeBrowse(context));
+	      var ids = context.selectedIDs();
 
-	        context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
+	      if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
+	        return continueTo(chooseCategoryBuilding);
+	      }
+	    });
 
-	        var rightClickString = helpString('intro.lines.split_street', {
-	                street1: _t('intro.graph.name.11th-avenue'),
-	                street2: _t('intro.graph.name.washington-street')
-	            }) +
-	            helpString('intro.lines.' + (context.lastPointerType() === 'mouse' ? 'rightclick_intersection' : 'edit_menu_intersection_touch'));
+	    function continueTo(nextStep) {
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      context.container().select('.preset-list-button').on('click.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        timeout(function() {
-	            var padding = 60 * Math.pow(2, context.map().zoom() - 18);
-	            var box = pad(eleventhAvenueEnd, padding, context);
-	            reveal(box, rightClickString);
+	  function closeEditorHouse() {
+	    if (!_houseID || !context.hasEntity(_houseID)) {
+	      return addHouse();
+	    }
 
-	            context.map().on('move.intro drawn.intro', function() {
-	                var padding = 60 * Math.pow(2, context.map().zoom() - 18);
-	                var box = pad(eleventhAvenueEnd, padding, context);
-	                reveal(box, rightClickString,
-	                    { duration: 0 }
-	                );
-	            });
+	    var ids = context.selectedIDs();
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'select') { return; }
-	                var ids = context.selectedIDs();
-	                if (ids.length !== 1 || ids[0] !== eleventhAvenueEndID) { return; }
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+	      context.enter(modeSelect(context, [_houseID]));
+	    }
 
-	                timeout(function() {
-	                    var node = selectMenuItem(context, 'split').node();
-	                    if (!node) { return; }
-	                    continueTo(splitIntersection);
-	                }, 50);  // after menu visible
-	            });
+	    context.history().checkpoint('hasHouse');
+	    context.on('exit.intro', function () {
+	      continueTo(rightClickHouse);
+	    });
+	    timeout(function () {
+	      reveal('.entity-editor-pane', helpHtml('intro.buildings.close', {
+	        button: icon('#iD-icon-close', 'inline')
+	      }));
+	    }, 500);
 
-	            context.history().on('change.intro', function() {
-	                timeout(function() {
-	                    continueTo(deleteLines);
-	                }, 300);  // after any transition (e.g. if user deleted intersection)
-	            });
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        }, 600);
+	  function rightClickHouse() {
+	    if (!_houseID) return chapter.restart();
+	    context.enter(modeBrowse(context));
+	    context.history().reset('hasHouse');
+	    var zoom = context.map().zoom();
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	    if (zoom < 20) {
+	      zoom = 20;
 	    }
 
+	    context.map().centerZoomEase(house, zoom, 500);
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id !== 'select') return;
+	      var ids = context.selectedIDs();
+	      if (ids.length !== 1 || ids[0] !== _houseID) return;
+	      timeout(function () {
+	        var node = selectMenuItem(context, 'orthogonalize').node();
+	        if (!node) return;
+	        continueTo(clickSquare);
+	      }, 50); // after menu visible
+	    });
+	    context.map().on('move.intro drawn.intro', function () {
+	      var rightclickString = helpHtml('intro.buildings.' + (context.lastPointerType() === 'mouse' ? 'rightclick_building' : 'edit_menu_building_touch'));
+	      revealHouse(house, rightclickString, {
+	        duration: 0
+	      });
+	    });
+	    context.history().on('change.intro', function () {
+	      continueTo(rightClickHouse);
+	    });
 
-	    function splitIntersection() {
-	        if (!context.hasEntity(washingtonStreetID) ||
-	            !context.hasEntity(twelfthAvenueID) ||
-	            !context.hasEntity(eleventhAvenueEndID)) {
-	            return continueTo(deleteLines);
-	        }
-
-	        var node = selectMenuItem(context, 'split').node();
-	        if (!node) { return continueTo(rightClickIntersection); }
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        var wasChanged = false;
-	        _washingtonSegmentID = null;
+	  function clickSquare() {
+	    if (!_houseID) return chapter.restart();
+	    var entity = context.hasEntity(_houseID);
+	    if (!entity) return continueTo(rightClickHouse);
+	    var node = selectMenuItem(context, 'orthogonalize').node();
 
-	        reveal('.edit-menu', helpString('intro.lines.split_intersection',
-	            { street: _t('intro.graph.name.washington-street') }),
-	            { padding: 50 }
-	        );
+	    if (!node) {
+	      return continueTo(rightClickHouse);
+	    }
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            var node = selectMenuItem(context, 'split').node();
-	            if (!wasChanged && !node) { return continueTo(rightClickIntersection); }
+	    var wasChanged = false;
+	    reveal('.edit-menu', helpHtml('intro.buildings.square_building'), {
+	      padding: 50
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id === 'browse') {
+	        continueTo(rightClickHouse);
+	      } else if (mode.id === 'move' || mode.id === 'rotate') {
+	        continueTo(retryClickSquare);
+	      }
+	    });
+	    context.map().on('move.intro', function () {
+	      var node = selectMenuItem(context, 'orthogonalize').node();
 
-	            reveal('.edit-menu', helpString('intro.lines.split_intersection',
-	                { street: _t('intro.graph.name.washington-street') }),
-	                { duration: 0, padding: 50 }
-	            );
-	        });
+	      if (!wasChanged && !node) {
+	        return continueTo(rightClickHouse);
+	      }
 
-	        context.history().on('change.intro', function(changed) {
-	            wasChanged = true;
-	            timeout(function() {
-	                if (context.history().undoAnnotation() === _t('operations.split.annotation.line')) {
-	                    _washingtonSegmentID = changed.created()[0].id;
-	                    continueTo(didSplit);
-	                } else {
-	                    _washingtonSegmentID = null;
-	                    continueTo(retrySplit);
-	                }
-	            }, 300);  // after any transition (e.g. if user deleted intersection)
-	        });
+	      reveal('.edit-menu', helpHtml('intro.buildings.square_building'), {
+	        duration: 0,
+	        padding: 50
+	      });
+	    });
+	    context.history().on('change.intro', function () {
+	      wasChanged = true;
+	      context.history().on('change.intro', null); // Something changed.  Wait for transition to complete and check undo annotation.
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
+	      timeout(function () {
+	        if (context.history().undoAnnotation() === _t('operations.orthogonalize.annotation.feature', {
+	          n: 1
+	        })) {
+	          continueTo(doneSquare);
+	        } else {
+	          continueTo(retryClickSquare);
 	        }
-	    }
-
-
-	    function retrySplit() {
-	        context.enter(modeBrowse(context));
-	        context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
-	        var advance = function() { continueTo(rightClickIntersection); };
+	      }, 500); // after transitioned actions
+	    });
 
-	        var padding = 60 * Math.pow(2, context.map().zoom() - 18);
-	        var box = pad(eleventhAvenueEnd, padding, context);
-	        reveal(box, helpString('intro.lines.retry_split'),
-	            { buttonText: _t('intro.ok'), buttonCallback: advance }
-	        );
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            var padding = 60 * Math.pow(2, context.map().zoom() - 18);
-	            var box = pad(eleventhAvenueEnd, padding, context);
-	            reveal(box, helpString('intro.lines.retry_split'),
-	                { duration: 0, buttonText: _t('intro.ok'), buttonCallback: advance }
-	            );
-	        });
+	  function retryClickSquare() {
+	    context.enter(modeBrowse(context));
+	    revealHouse(house, helpHtml('intro.buildings.retry_square'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        continueTo(rightClickHouse);
+	      }
+	    });
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      nextStep();
 	    }
+	  }
 
+	  function doneSquare() {
+	    context.history().checkpoint('doneSquare');
+	    revealHouse(house, helpHtml('intro.buildings.done_square'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        continueTo(addTank);
+	      }
+	    });
 
-	    function didSplit() {
-	        if (!_washingtonSegmentID ||
-	            !context.hasEntity(_washingtonSegmentID) ||
-	            !context.hasEntity(washingtonStreetID) ||
-	            !context.hasEntity(twelfthAvenueID) ||
-	            !context.hasEntity(eleventhAvenueEndID)) {
-	            return continueTo(rightClickIntersection);
-	        }
+	    function continueTo(nextStep) {
+	      nextStep();
+	    }
+	  }
 
-	        var ids = context.selectedIDs();
-	        var string = 'intro.lines.did_split_' + (ids.length > 1 ? 'multi' : 'single');
-	        var street = _t('intro.graph.name.washington-street');
+	  function addTank() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('doneSquare');
+	    _tankID = null;
+	    var msec = transitionTime(tank, context.map().center());
 
-	        var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	        var box = pad(twelfthAvenue, padding, context);
-	        box.width = box.width / 2;
-	        reveal(box, helpString(string, { street1: street, street2: street }),
-	            { duration: 500 }
-	        );
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
-	        timeout(function() {
-	            context.map().centerZoomEase(twelfthAvenue, 18, 500);
+	    context.map().centerZoomEase(tank, 19.5, msec);
+	    timeout(function () {
+	      reveal('button.add-area', helpHtml('intro.buildings.add_tank'));
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'add-area') return;
+	        continueTo(startTank);
+	      });
+	    }, msec + 100);
 
-	            context.map().on('move.intro drawn.intro', function() {
-	                var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	                var box = pad(twelfthAvenue, padding, context);
-	                box.width = box.width / 2;
-	                reveal(box, helpString(string, { street1: street, street2: street }),
-	                    { duration: 0 }
-	                );
-	            });
-	        }, 600);  // after initial reveal and curtain cut
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context.on('enter.intro', function() {
-	            var ids = context.selectedIDs();
-	            if (ids.length === 1 && ids[0] === _washingtonSegmentID) {
-	                continueTo(multiSelect);
-	            }
-	        });
+	  function startTank() {
+	    if (context.mode().id !== 'add-area') {
+	      return continueTo(addTank);
+	    }
 
-	        context.history().on('change.intro', function() {
-	            if (!_washingtonSegmentID ||
-	                !context.hasEntity(_washingtonSegmentID) ||
-	                !context.hasEntity(washingtonStreetID) ||
-	                !context.hasEntity(twelfthAvenueID) ||
-	                !context.hasEntity(eleventhAvenueEndID)) {
-	                return continueTo(rightClickIntersection);
-	            }
+	    _tankID = null;
+	    timeout(function () {
+	      var startString = helpHtml('intro.buildings.start_tank') + helpHtml('intro.buildings.tank_edge_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap'));
+	      revealTank(tank, startString);
+	      context.map().on('move.intro drawn.intro', function () {
+	        revealTank(tank, startString, {
+	          duration: 0
 	        });
+	      });
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'draw-area') return chapter.restart();
+	        continueTo(continueTank);
+	      });
+	    }, 550); // after easing
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function continueTank() {
+	    if (context.mode().id !== 'draw-area') {
+	      return continueTo(addTank);
+	    }
 
-	    function multiSelect() {
-	        if (!_washingtonSegmentID ||
-	            !context.hasEntity(_washingtonSegmentID) ||
-	            !context.hasEntity(washingtonStreetID) ||
-	            !context.hasEntity(twelfthAvenueID) ||
-	            !context.hasEntity(eleventhAvenueEndID)) {
-	            return continueTo(rightClickIntersection);
-	        }
-
-	        var ids = context.selectedIDs();
-	        var hasWashington = ids.indexOf(_washingtonSegmentID) !== -1;
-	        var hasTwelfth = ids.indexOf(twelfthAvenueID) !== -1;
+	    _tankID = null;
+	    var continueString = helpHtml('intro.buildings.continue_tank') + '{br}' + helpHtml('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.buildings.finish_tank');
+	    revealTank(tank, continueString);
+	    context.map().on('move.intro drawn.intro', function () {
+	      revealTank(tank, continueString, {
+	        duration: 0
+	      });
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id === 'draw-area') {
+	        return;
+	      } else if (mode.id === 'select') {
+	        _tankID = context.selectedIDs()[0];
+	        return continueTo(searchPresetTank);
+	      } else {
+	        return continueTo(addTank);
+	      }
+	    });
 
-	        if (hasWashington && hasTwelfth) {
-	            return continueTo(multiRightClick);
-	        } else if (!hasWashington && !hasTwelfth) {
-	            return continueTo(didSplit);
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context.map().centerZoomEase(twelfthAvenue, 18, 500);
+	  function searchPresetTank() {
+	    if (!_tankID || !context.hasEntity(_tankID)) {
+	      return addTank();
+	    }
 
-	        timeout(function() {
-	            var selected, other, padding, box;
-	            if (hasWashington) {
-	                selected = _t('intro.graph.name.washington-street');
-	                other = _t('intro.graph.name.12th-avenue');
-	                padding = 60 * Math.pow(2, context.map().zoom() - 18);
-	                box = pad(twelfthAvenueEnd, padding, context);
-	                box.width *= 3;
-	            } else {
-	                selected = _t('intro.graph.name.12th-avenue');
-	                other = _t('intro.graph.name.washington-street');
-	                padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	                box = pad(twelfthAvenue, padding, context);
-	                box.width /= 2;
-	            }
+	    var ids = context.selectedIDs();
 
-	            reveal(box,
-	                helpString('intro.lines.multi_select',
-	                    { selected: selected, other1: other }) + ' ' +
-	                helpString('intro.lines.add_to_selection_' + (context.lastPointerType() === 'mouse' ? 'click' : 'touch'),
-	                    { selected: selected, other2: other })
-	            );
-
-	            context.map().on('move.intro drawn.intro', function() {
-	                if (hasWashington) {
-	                    selected = _t('intro.graph.name.washington-street');
-	                    other = _t('intro.graph.name.12th-avenue');
-	                    padding = 60 * Math.pow(2, context.map().zoom() - 18);
-	                    box = pad(twelfthAvenueEnd, padding, context);
-	                    box.width *= 3;
-	                } else {
-	                    selected = _t('intro.graph.name.12th-avenue');
-	                    other = _t('intro.graph.name.washington-street');
-	                    padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	                    box = pad(twelfthAvenue, padding, context);
-	                    box.width /= 2;
-	                }
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
+	      context.enter(modeSelect(context, [_tankID]));
+	    } // disallow scrolling
 
-	                reveal(box,
-	                    helpString('intro.lines.multi_select',
-	                        { selected: selected, other1: other }) + ' ' +
-	                    helpString('intro.lines.add_to_selection_' + (context.lastPointerType() === 'mouse' ? 'click' : 'touch'),
-	                        { selected: selected, other2: other }),
-	                    { duration: 0 }
-	                );
-	            });
 
-	            context.on('enter.intro', function() {
-	                continueTo(multiSelect);
-	            });
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    timeout(function () {
+	      // reset pane, in case user somehow happened to change it..
+	      context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	      context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+	      reveal('.preset-search-input', helpHtml('intro.buildings.search_tank', {
+	        preset: tankPreset.name()
+	      }));
+	    }, 400); // after preset list pane visible..
 
-	            context.history().on('change.intro', function() {
-	                if (!_washingtonSegmentID ||
-	                    !context.hasEntity(_washingtonSegmentID) ||
-	                    !context.hasEntity(washingtonStreetID) ||
-	                    !context.hasEntity(twelfthAvenueID) ||
-	                    !context.hasEntity(eleventhAvenueEndID)) {
-	                    return continueTo(rightClickIntersection);
-	                }
-	            });
-	        }, 600);
+	    context.on('enter.intro', function (mode) {
+	      if (!_tankID || !context.hasEntity(_tankID)) {
+	        return continueTo(addTank);
+	      }
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	      var ids = context.selectedIDs();
 
+	      if (mode.id !== 'select' || !ids.length || ids[0] !== _tankID) {
+	        // keep the user's area selected..
+	        context.enter(modeSelect(context, [_tankID])); // reset pane, in case user somehow happened to change it..
 
-	    function multiRightClick() {
-	        if (!_washingtonSegmentID ||
-	            !context.hasEntity(_washingtonSegmentID) ||
-	            !context.hasEntity(washingtonStreetID) ||
-	            !context.hasEntity(twelfthAvenueID) ||
-	            !context.hasEntity(eleventhAvenueEndID)) {
-	            return continueTo(rightClickIntersection);
-	        }
+	        context.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling
 
-	        var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	        var box = pad(twelfthAvenue, padding, context);
+	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	        context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+	        reveal('.preset-search-input', helpHtml('intro.buildings.search_tank', {
+	          preset: tankPreset.name()
+	        }));
+	        context.history().on('change.intro', null);
+	      }
+	    });
 
-	        var rightClickString = helpString('intro.lines.multi_select_success') +
-	            helpString('intro.lines.multi_' + (context.lastPointerType() === 'mouse' ? 'rightclick' : 'edit_menu_touch'));
-	        reveal(box, rightClickString);
+	    function checkPresetSearch() {
+	      var first = context.container().select('.preset-list-item:first-child');
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	            var box = pad(twelfthAvenue, padding, context);
-	            reveal(box, rightClickString, { duration: 0 });
+	      if (first.classed('preset-man_made-storage_tank')) {
+	        reveal(first.select('.preset-list-button').node(), helpHtml('intro.buildings.choose_tank', {
+	          preset: tankPreset.name()
+	        }), {
+	          duration: 300
 	        });
-
-	        context.ui().editMenu().on('toggled.intro', function(open) {
-	            if (!open) { return; }
-
-	            timeout(function() {
-	                var ids = context.selectedIDs();
-	                if (ids.length === 2 &&
-	                    ids.indexOf(twelfthAvenueID) !== -1 &&
-	                    ids.indexOf(_washingtonSegmentID) !== -1) {
-	                        var node = selectMenuItem(context, 'delete').node();
-	                        if (!node) { return; }
-	                        continueTo(multiDelete);
-	                } else if (ids.length === 1 &&
-	                    ids.indexOf(_washingtonSegmentID) !== -1) {
-	                    return continueTo(multiSelect);
-	                } else {
-	                    return continueTo(didSplit);
-	                }
-	            }, 300);  // after edit menu visible
+	        context.container().select('.preset-search-input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
+	        context.history().on('change.intro', function () {
+	          continueTo(closeEditorTank);
 	        });
+	      }
+	    }
 
-	        context.history().on('change.intro', function() {
-	            if (!_washingtonSegmentID ||
-	                !context.hasEntity(_washingtonSegmentID) ||
-	                !context.hasEntity(washingtonStreetID) ||
-	                !context.hasEntity(twelfthAvenueID) ||
-	                !context.hasEntity(eleventhAvenueEndID)) {
-	                return continueTo(rightClickIntersection);
-	            }
-	        });
+	    function continueTo(nextStep) {
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.ui().editMenu().on('toggled.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	  function closeEditorTank() {
+	    if (!_tankID || !context.hasEntity(_tankID)) {
+	      return addTank();
 	    }
 
+	    var ids = context.selectedIDs();
 
-	    function multiDelete() {
-	        if (!_washingtonSegmentID ||
-	            !context.hasEntity(_washingtonSegmentID) ||
-	            !context.hasEntity(washingtonStreetID) ||
-	            !context.hasEntity(twelfthAvenueID) ||
-	            !context.hasEntity(eleventhAvenueEndID)) {
-	            return continueTo(rightClickIntersection);
-	        }
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
+	      context.enter(modeSelect(context, [_tankID]));
+	    }
 
-	        var node = selectMenuItem(context, 'delete').node();
-	        if (!node) { return continueTo(multiRightClick); }
+	    context.history().checkpoint('hasTank');
+	    context.on('exit.intro', function () {
+	      continueTo(rightClickTank);
+	    });
+	    timeout(function () {
+	      reveal('.entity-editor-pane', helpHtml('intro.buildings.close', {
+	        button: icon('#iD-icon-close', 'inline')
+	      }));
+	    }, 500);
 
-	        reveal('.edit-menu',
-	            helpString('intro.lines.multi_delete'),
-	            { padding: 50 }
-	        );
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            reveal('.edit-menu',
-	                helpString('intro.lines.multi_delete'),
-	                { duration: 0, padding: 50 }
-	            );
+	  function rightClickTank() {
+	    if (!_tankID) return continueTo(addTank);
+	    context.enter(modeBrowse(context));
+	    context.history().reset('hasTank');
+	    context.map().centerEase(tank, 500);
+	    timeout(function () {
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'select') return;
+	        var ids = context.selectedIDs();
+	        if (ids.length !== 1 || ids[0] !== _tankID) return;
+	        timeout(function () {
+	          var node = selectMenuItem(context, 'circularize').node();
+	          if (!node) return;
+	          continueTo(clickCircle);
+	        }, 50); // after menu visible
+	      });
+	      var rightclickString = helpHtml('intro.buildings.' + (context.lastPointerType() === 'mouse' ? 'rightclick_tank' : 'edit_menu_tank_touch'));
+	      revealTank(tank, rightclickString);
+	      context.map().on('move.intro drawn.intro', function () {
+	        revealTank(tank, rightclickString, {
+	          duration: 0
 	        });
+	      });
+	      context.history().on('change.intro', function () {
+	        continueTo(rightClickTank);
+	      });
+	    }, 600);
 
-	        context.on('exit.intro', function() {
-	            if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
-	                return continueTo(multiSelect);  // left select mode but roads still exist
-	            }
-	        });
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context.history().on('change.intro', function() {
-	            if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
-	                continueTo(retryDelete);         // changed something but roads still exist
-	            } else {
-	                continueTo(play);
-	            }
-	        });
+	  function clickCircle() {
+	    if (!_tankID) return chapter.restart();
+	    var entity = context.hasEntity(_tankID);
+	    if (!entity) return continueTo(rightClickTank);
+	    var node = selectMenuItem(context, 'circularize').node();
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	    if (!node) {
+	      return continueTo(rightClickTank);
 	    }
 
+	    var wasChanged = false;
+	    reveal('.edit-menu', helpHtml('intro.buildings.circle_tank'), {
+	      padding: 50
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id === 'browse') {
+	        continueTo(rightClickTank);
+	      } else if (mode.id === 'move' || mode.id === 'rotate') {
+	        continueTo(retryClickCircle);
+	      }
+	    });
+	    context.map().on('move.intro', function () {
+	      var node = selectMenuItem(context, 'circularize').node();
 
-	    function retryDelete() {
-	        context.enter(modeBrowse(context));
+	      if (!wasChanged && !node) {
+	        return continueTo(rightClickTank);
+	      }
 
-	        var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	        var box = pad(twelfthAvenue, padding, context);
-	        reveal(box, helpString('intro.lines.retry_delete'), {
-	            buttonText: _t('intro.ok'),
-	            buttonCallback: function() { continueTo(multiSelect); }
-	        });
+	      reveal('.edit-menu', helpHtml('intro.buildings.circle_tank'), {
+	        duration: 0,
+	        padding: 50
+	      });
+	    });
+	    context.history().on('change.intro', function () {
+	      wasChanged = true;
+	      context.history().on('change.intro', null); // Something changed.  Wait for transition to complete and check undo annotation.
 
-	        function continueTo(nextStep) {
-	            nextStep();
+	      timeout(function () {
+	        if (context.history().undoAnnotation() === _t('operations.circularize.annotation.feature', {
+	          n: 1
+	        })) {
+	          continueTo(play);
+	        } else {
+	          continueTo(retryClickCircle);
 	        }
-	    }
-
-
-	    function play() {
-	        dispatch$1.call('done');
-	        reveal('.ideditor',
-	            helpString('intro.lines.play', { next: _t('intro.buildings.title') }), {
-	                tooltipBox: '.intro-nav-wrap .chapter-building',
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { reveal('.ideditor'); }
-	            }
-	        );
-	   }
+	      }, 500); // after transitioned actions
+	    });
 
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    chapter.enter = function() {
-	        addLine();
-	    };
+	  function retryClickCircle() {
+	    context.enter(modeBrowse(context));
+	    revealTank(tank, helpHtml('intro.buildings.retry_circle'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        continueTo(rightClickTank);
+	      }
+	    });
 
+	    function continueTo(nextStep) {
+	      nextStep();
+	    }
+	  }
 
-	    chapter.exit = function() {
-	        timeouts.forEach(window.clearTimeout);
-	        select(window).on('pointerdown.intro mousedown.intro', null, true);
-	        context.on('enter.intro exit.intro', null);
-	        context.map().on('move.intro drawn.intro', null);
-	        context.history().on('change.intro', null);
-	        context.container().select('.inspector-wrap').on('wheel.intro', null);
-	        context.container().select('.preset-list-button').on('click.intro', null);
-	    };
+	  function play() {
+	    dispatch.call('done');
+	    reveal('.ideditor', helpHtml('intro.buildings.play', {
+	      next: _t('intro.startediting.title')
+	    }), {
+	      tooltipBox: '.intro-nav-wrap .chapter-startEditing',
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        reveal('.ideditor');
+	      }
+	    });
+	  }
 
+	  chapter.enter = function () {
+	    addHouse();
+	  };
 
-	    chapter.restart = function() {
-	        chapter.exit();
-	        chapter.enter();
-	    };
+	  chapter.exit = function () {
+	    timeouts.forEach(window.clearTimeout);
+	    context.on('enter.intro exit.intro', null);
+	    context.map().on('move.intro drawn.intro', null);
+	    context.history().on('change.intro', null);
+	    context.container().select('.inspector-wrap').on('wheel.intro', null);
+	    context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+	    context.container().select('.more-fields .combobox-input').on('click.intro', null);
+	  };
 
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	    return utilRebind(chapter, dispatch$1, 'on');
+	  return utilRebind(chapter, dispatch, 'on');
 	}
 
-	function uiIntroBuilding(context, reveal) {
-	    var dispatch$1 = dispatch('done');
-	    var house = [-85.62815, 41.95638];
-	    var tank = [-85.62732, 41.95347];
-	    var buildingCatetory = _mainPresetIndex.item('category-building');
-	    var housePreset = _mainPresetIndex.item('building/house');
-	    var tankPreset = _mainPresetIndex.item('man_made/storage_tank');
-	    var timeouts = [];
-	    var _houseID = null;
-	    var _tankID = null;
-
-
-	    var chapter = {
-	        title: 'intro.buildings.title'
-	    };
-
+	function uiIntroStartEditing(context, reveal) {
+	  var dispatch = dispatch$8('done', 'startEditing');
+	  var modalSelection = select(null);
+	  var chapter = {
+	    title: 'intro.startediting.title'
+	  };
 
-	    function timeout(f, t) {
-	        timeouts.push(window.setTimeout(f, t));
-	    }
+	  function showHelp() {
+	    reveal('.map-control.help-control', helpHtml('intro.startediting.help'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        shortcuts();
+	      }
+	    });
+	  }
 
+	  function shortcuts() {
+	    reveal('.map-control.help-control', helpHtml('intro.startediting.shortcuts'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        showSave();
+	      }
+	    });
+	  }
 
-	    function eventCancel() {
-	        event.stopPropagation();
-	        event.preventDefault();
-	    }
+	  function showSave() {
+	    context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
 
+	    reveal('.top-toolbar button.save', helpHtml('intro.startediting.save'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        showStart();
+	      }
+	    });
+	  }
 
-	    function revealHouse(center, text, options) {
-	        var padding = 160 * Math.pow(2, context.map().zoom() - 20);
-	        var box = pad(center, padding, context);
-	        reveal(box, text, options);
-	    }
+	  function showStart() {
+	    context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
 
+	    modalSelection = uiModal(context.container());
+	    modalSelection.select('.modal').attr('class', 'modal-splash modal');
+	    modalSelection.selectAll('.close').remove();
+	    var startbutton = modalSelection.select('.content').attr('class', 'fillL').append('button').attr('class', 'modal-section huge-modal-button').on('click', function () {
+	      modalSelection.remove();
+	    });
+	    startbutton.append('svg').attr('class', 'illustration').append('use').attr('xlink:href', '#iD-logo-walkthrough');
+	    startbutton.append('h2').html(_t.html('intro.startediting.start'));
+	    dispatch.call('startEditing');
+	  }
 
-	    function revealTank(center, text, options) {
-	        var padding = 190 * Math.pow(2, context.map().zoom() - 19.5);
-	        var box = pad(center, padding, context);
-	        reveal(box, text, options);
-	    }
+	  chapter.enter = function () {
+	    showHelp();
+	  };
 
+	  chapter.exit = function () {
+	    modalSelection.remove();
+	    context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
+	  };
 
-	    function addHouse() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');
-	        _houseID = null;
-
-	        var msec = transitionTime(house, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(house, 19, msec);
-
-	        timeout(function() {
-	            var tooltip = reveal('button.add-area',
-	                helpString('intro.buildings.add_building'));
-
-	            tooltip.selectAll('.popover-inner')
-	                .insert('svg', 'span')
-	                .attr('class', 'tooltip-illustration')
-	                .append('use')
-	                .attr('xlink:href', '#iD-graphic-buildings');
-
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'add-area') { return; }
-	                continueTo(startHouse);
-	            });
-	        }, msec + 100);
+	  return utilRebind(chapter, dispatch, 'on');
+	}
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	var chapterUi = {
+	  welcome: uiIntroWelcome,
+	  navigation: uiIntroNavigation,
+	  point: uiIntroPoint,
+	  area: uiIntroArea,
+	  line: uiIntroLine,
+	  building: uiIntroBuilding,
+	  startEditing: uiIntroStartEditing
+	};
+	var chapterFlow = ['welcome', 'navigation', 'point', 'area', 'line', 'building', 'startEditing'];
+	function uiIntro(context) {
+	  var INTRO_IMAGERY = 'EsriWorldImageryClarity';
+	  var _introGraph = {};
 
+	  var _currChapter;
 
-	    function startHouse() {
-	        if (context.mode().id !== 'add-area') {
-	            return continueTo(addHouse);
+	  function intro(selection) {
+	    _mainFileFetcher.get('intro_graph').then(function (dataIntroGraph) {
+	      // create entities for intro graph and localize names
+	      for (var id in dataIntroGraph) {
+	        if (!_introGraph[id]) {
+	          _introGraph[id] = osmEntity(localize(dataIntroGraph[id]));
 	        }
+	      }
 
-	        _houseID = null;
-	        context.map().zoomEase(20, 500);
+	      selection.call(startIntro);
+	    })["catch"](function () {
+	      /* ignore */
+	    });
+	  }
 
-	        timeout(function() {
-	            var startString = helpString('intro.buildings.start_building') +
-	                helpString('intro.buildings.building_corner_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap'));
-	            revealHouse(house, startString);
+	  function startIntro(selection) {
+	    context.enter(modeBrowse(context)); // Save current map state
 
-	            context.map().on('move.intro drawn.intro', function() {
-	                revealHouse(house, startString, { duration: 0 });
-	            });
+	    var osm = context.connection();
+	    var history = context.history().toJSON();
+	    var hash = window.location.hash;
+	    var center = context.map().center();
+	    var zoom = context.map().zoom();
+	    var background = context.background().baseLayerSource();
+	    var overlays = context.background().overlayLayerSources();
+	    var opacity = context.container().selectAll('.main-map .layer-background').style('opacity');
+	    var caches = osm && osm.caches();
+	    var baseEntities = context.history().graph().base().entities; // Show sidebar and disable the sidebar resizing button
+	    // (this needs to be before `context.inIntro(true)`)
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'draw-area') { return chapter.restart(); }
-	                continueTo(continueHouse);
-	            });
+	    context.ui().sidebar.expand();
+	    context.container().selectAll('button.sidebar-toggle').classed('disabled', true); // Block saving
 
-	        }, 550);  // after easing
+	    context.inIntro(true); // Load semi-real data used in intro
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    if (osm) {
+	      osm.toggle(false).reset();
 	    }
 
+	    context.history().reset();
+	    context.history().merge(Object.values(coreGraph().load(_introGraph).entities));
+	    context.history().checkpoint('initial'); // Setup imagery
 
-	    function continueHouse() {
-	        if (context.mode().id !== 'draw-area') {
-	            return continueTo(addHouse);
-	        }
-
-	        _houseID = null;
+	    var imagery = context.background().findSource(INTRO_IMAGERY);
 
-	        var continueString = helpString('intro.buildings.continue_building') + '{br}' +
-	            helpString('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) +
-	            helpString('intro.buildings.finish_building');
+	    if (imagery) {
+	      context.background().baseLayerSource(imagery);
+	    } else {
+	      context.background().bing();
+	    }
 
-	        revealHouse(house, continueString);
+	    overlays.forEach(function (d) {
+	      return context.background().toggleOverlayLayer(d);
+	    }); // Setup data layers (only OSM)
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            revealHouse(house, continueString, { duration: 0 });
-	        });
+	    var layers = context.layers();
+	    layers.all().forEach(function (item) {
+	      // if the layer has the function `enabled`
+	      if (typeof item.layer.enabled === 'function') {
+	        item.layer.enabled(item.id === 'osm');
+	      }
+	    });
+	    context.container().selectAll('.main-map .layer-background').style('opacity', 1);
+	    var curtain = uiCurtain(context.container().node());
+	    selection.call(curtain); // Store that the user started the walkthrough..
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'draw-area') {
-	                return;
-	            } else if (mode.id === 'select') {
-	                var graph = context.graph();
-	                var way = context.entity(context.selectedIDs()[0]);
-	                var nodes = graph.childNodes(way);
-	                var points = utilArrayUniq(nodes)
-	                    .map(function(n) { return context.projection(n.loc); });
-
-	                if (isMostlySquare(points)) {
-	                    _houseID = way.id;
-	                    return continueTo(chooseCategoryBuilding);
-	                } else {
-	                    return continueTo(retryHouse);
-	                }
+	    corePreferences('walkthrough_started', 'yes'); // Restore previous walkthrough progress..
 
-	            } else {
-	                return chapter.restart();
-	            }
-	        });
+	    var storedProgress = corePreferences('walkthrough_progress') || '';
+	    var progress = storedProgress.split(';').filter(Boolean);
+	    var chapters = chapterFlow.map(function (chapter, i) {
+	      var s = chapterUi[chapter](context, curtain.reveal).on('done', function () {
+	        buttons.filter(function (d) {
+	          return d.title === s.title;
+	        }).classed('finished', true);
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	        if (i < chapterFlow.length - 1) {
+	          var next = chapterFlow[i + 1];
+	          context.container().select("button.chapter-".concat(next)).classed('next', true);
+	        } // Store walkthrough progress..
 
 
-	    function retryHouse() {
-	        var onClick = function() { continueTo(addHouse); };
+	        progress.push(chapter);
+	        corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';'));
+	      });
+	      return s;
+	    });
+	    chapters[chapters.length - 1].on('startEditing', function () {
+	      // Store walkthrough progress..
+	      progress.push('startEditing');
+	      corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';')); // Store if walkthrough is completed..
 
-	        revealHouse(house, helpString('intro.buildings.retry_building'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	      var incomplete = utilArrayDifference(chapterFlow, progress);
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            revealHouse(house, helpString('intro.buildings.retry_building'),
-	                { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	            );
-	        });
+	      if (!incomplete.length) {
+	        corePreferences('walkthrough_completed', 'yes');
+	      }
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
-	        }
-	    }
+	      curtain.remove();
+	      navwrap.remove();
+	      context.container().selectAll('.main-map .layer-background').style('opacity', opacity);
+	      context.container().selectAll('button.sidebar-toggle').classed('disabled', false);
 
+	      if (osm) {
+	        osm.toggle(true).reset().caches(caches);
+	      }
 
-	    function chooseCategoryBuilding() {
-	        if (!_houseID || !context.hasEntity(_houseID)) {
-	            return addHouse();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
-	            context.enter(modeSelect(context, [_houseID]));
-	        }
+	      context.history().reset().merge(Object.values(baseEntities));
+	      context.background().baseLayerSource(background);
+	      overlays.forEach(function (d) {
+	        return context.background().toggleOverlayLayer(d);
+	      });
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	      if (history) {
+	        context.history().fromJSON(history, false);
+	      }
 
-	        timeout(function() {
-	            // reset pane, in case user somehow happened to change it..
-	            context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	      context.map().centerZoom(center, zoom);
+	      window.location.replace(hash);
+	      context.inIntro(false);
+	    });
+	    var navwrap = selection.append('div').attr('class', 'intro-nav-wrap fillD');
+	    navwrap.append('svg').attr('class', 'intro-nav-wrap-logo').append('use').attr('xlink:href', '#iD-logo-walkthrough');
+	    var buttonwrap = navwrap.append('div').attr('class', 'joined').selectAll('button.chapter');
+	    var buttons = buttonwrap.data(chapters).enter().append('button').attr('class', function (d, i) {
+	      return "chapter chapter-".concat(chapterFlow[i]);
+	    }).on('click', enterChapter);
+	    buttons.append('span').html(function (d) {
+	      return _t.html(d.title);
+	    });
+	    buttons.append('span').attr('class', 'status').call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward', 'inline'));
+	    enterChapter(null, chapters[0]);
 
-	            var button = context.container().select('.preset-category-building .preset-list-button');
+	    function enterChapter(d3_event, newChapter) {
+	      if (_currChapter) {
+	        _currChapter.exit();
+	      }
 
-	            reveal(button.node(),
-	                helpString('intro.buildings.choose_category_building', { category: buildingCatetory.name() })
-	            );
+	      context.enter(modeBrowse(context));
+	      _currChapter = newChapter;
 
-	            button.on('click.intro', function() {
-	                button.on('click.intro', null);
-	                continueTo(choosePresetHouse);
-	            });
+	      _currChapter.enter();
 
-	        }, 400);  // after preset list pane visible..
+	      buttons.classed('next', false).classed('active', function (d) {
+	        return d.title === _currChapter.title;
+	      });
+	    }
+	  }
 
+	  return intro;
+	}
 
-	        context.on('enter.intro', function(mode) {
-	            if (!_houseID || !context.hasEntity(_houseID)) {
-	                return continueTo(addHouse);
-	            }
-	            var ids = context.selectedIDs();
-	            if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
-	                return continueTo(chooseCategoryBuilding);
-	            }
-	        });
+	function uiIssuesInfo(context) {
+	  var warningsItem = {
+	    id: 'warnings',
+	    count: 0,
+	    iconID: 'iD-icon-alert',
+	    descriptionID: 'issues.warnings_and_errors'
+	  };
+	  var resolvedItem = {
+	    id: 'resolved',
+	    count: 0,
+	    iconID: 'iD-icon-apply',
+	    descriptionID: 'issues.user_resolved_issues'
+	  };
+
+	  function update(selection) {
+	    var shownItems = [];
+	    var liveIssues = context.validator().getIssues({
+	      what: corePreferences('validate-what') || 'edited',
+	      where: corePreferences('validate-where') || 'all'
+	    });
 
-	        function continueTo(nextStep) {
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            context.container().select('.preset-list-button').on('click.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    if (liveIssues.length) {
+	      warningsItem.count = liveIssues.length;
+	      shownItems.push(warningsItem);
 	    }
 
+	    if (corePreferences('validate-what') === 'all') {
+	      var resolvedIssues = context.validator().getResolvedIssues();
 
-	    function choosePresetHouse() {
-	        if (!_houseID || !context.hasEntity(_houseID)) {
-	            return addHouse();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
-	            context.enter(modeSelect(context, [_houseID]));
-	        }
-
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	      if (resolvedIssues.length) {
+	        resolvedItem.count = resolvedIssues.length;
+	        shownItems.push(resolvedItem);
+	      }
+	    }
 
-	        timeout(function() {
-	            // reset pane, in case user somehow happened to change it..
-	            context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	    var chips = selection.selectAll('.chip').data(shownItems, function (d) {
+	      return d.id;
+	    });
+	    chips.exit().remove();
+	    var enter = chips.enter().append('a').attr('class', function (d) {
+	      return 'chip ' + d.id + '-count';
+	    }).attr('href', '#').each(function (d) {
+	      var chipSelection = select(this);
+	      var tooltipBehavior = uiTooltip().placement('top').title(_t.html(d.descriptionID));
+	      chipSelection.call(tooltipBehavior).on('click', function (d3_event) {
+	        d3_event.preventDefault();
+	        tooltipBehavior.hide(select(this)); // open the Issues pane
+
+	        context.ui().togglePanes(context.container().select('.map-panes .issues-pane'));
+	      });
+	      chipSelection.call(svgIcon('#' + d.iconID));
+	    });
+	    enter.append('span').attr('class', 'count');
+	    enter.merge(chips).selectAll('span.count').html(function (d) {
+	      return d.count.toString();
+	    });
+	  }
 
-	            var button = context.container().select('.preset-building-house .preset-list-button');
+	  return function (selection) {
+	    update(selection);
+	    context.validator().on('validated.infobox', function () {
+	      update(selection);
+	    });
+	  };
+	}
 
-	            reveal(button.node(),
-	                helpString('intro.buildings.choose_preset_house', { preset: housePreset.name() }),
-	                { duration: 300 }
-	            );
+	function uiMapInMap(context) {
+	  function mapInMap(selection) {
+	    var backgroundLayer = rendererTileLayer(context);
+	    var overlayLayers = {};
+	    var projection = geoRawMercator();
+	    var dataLayer = svgData(projection, context).showLabels(false);
+	    var debugLayer = svgDebug(projection, context);
+	    var zoom = d3_zoom().scaleExtent([geoZoomToScale(0.5), geoZoomToScale(24)]).on('start', zoomStarted).on('zoom', zoomed).on('end', zoomEnded);
+	    var wrap = select(null);
+	    var tiles = select(null);
+	    var viewport = select(null);
+	    var _isTransformed = false;
+	    var _isHidden = true;
+	    var _skipEvents = false;
+	    var _gesture = null;
+	    var _zDiff = 6; // by default, minimap renders at (main zoom - 6)
 
-	            button.on('click.intro', function() {
-	                button.on('click.intro', null);
-	                continueTo(closeEditorHouse);
-	            });
+	    var _dMini; // dimensions of minimap
 
-	        }, 400);  // after preset list pane visible..
 
-	        context.on('enter.intro', function(mode) {
-	            if (!_houseID || !context.hasEntity(_houseID)) {
-	                return continueTo(addHouse);
-	            }
-	            var ids = context.selectedIDs();
-	            if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
-	                return continueTo(chooseCategoryBuilding);
-	            }
-	        });
+	    var _cMini; // center pixel of minimap
 
-	        function continueTo(nextStep) {
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            context.container().select('.preset-list-button').on('click.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
 
+	    var _tStart; // transform at start of gesture
 
-	    function closeEditorHouse() {
-	        if (!_houseID || !context.hasEntity(_houseID)) {
-	            return addHouse();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
-	            context.enter(modeSelect(context, [_houseID]));
-	        }
 
-	        context.history().checkpoint('hasHouse');
+	    var _tCurr; // transform at most recent event
 
-	        context.on('exit.intro', function() {
-	            continueTo(rightClickHouse);
-	        });
 
-	        timeout(function() {
-	            reveal('.entity-editor-pane',
-	                helpString('intro.buildings.close', { button: icon('#iD-icon-close', 'pre-text') })
-	            );
-	        }, 500);
+	    var _timeoutID;
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    function zoomStarted() {
+	      if (_skipEvents) return;
+	      _tStart = _tCurr = projection.transform();
+	      _gesture = null;
 	    }
 
+	    function zoomed(d3_event) {
+	      if (_skipEvents) return;
+	      var x = d3_event.transform.x;
+	      var y = d3_event.transform.y;
+	      var k = d3_event.transform.k;
+	      var isZooming = k !== _tStart.k;
+	      var isPanning = x !== _tStart.x || y !== _tStart.y;
 
-	    function rightClickHouse() {
-	        if (!_houseID) { return chapter.restart(); }
-
-	        context.enter(modeBrowse(context));
-	        context.history().reset('hasHouse');
-	        var zoom = context.map().zoom();
-	        if (zoom < 20) {
-	            zoom = 20;
-	        }
-	        context.map().centerZoomEase(house, zoom, 500);
-
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id !== 'select') { return; }
-	            var ids = context.selectedIDs();
-	            if (ids.length !== 1 || ids[0] !== _houseID) { return; }
-
-	            timeout(function() {
-	                var node = selectMenuItem(context, 'orthogonalize').node();
-	                if (!node) { return; }
-	                continueTo(clickSquare);
-	            }, 50);  // after menu visible
-	        });
-
-	        context.map().on('move.intro drawn.intro', function() {
-	            var rightclickString = helpString('intro.buildings.' + (context.lastPointerType() === 'mouse' ? 'rightclick_building' : 'edit_menu_building_touch'));
-	            revealHouse(house, rightclickString, { duration: 0 });
-	        });
-
-	        context.history().on('change.intro', function() {
-	            continueTo(rightClickHouse);
-	        });
-
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	      if (!isZooming && !isPanning) {
+	        return; // no change
+	      } // lock in either zooming or panning, don't allow both in minimap.
 
 
-	    function clickSquare() {
-	        if (!_houseID) { return chapter.restart(); }
-	        var entity = context.hasEntity(_houseID);
-	        if (!entity) { return continueTo(rightClickHouse); }
+	      if (!_gesture) {
+	        _gesture = isZooming ? 'zoom' : 'pan';
+	      }
 
-	        var node = selectMenuItem(context, 'orthogonalize').node();
-	        if (!node) { return continueTo(rightClickHouse); }
+	      var tMini = projection.transform();
+	      var tX, tY, scale;
 
-	        var wasChanged = false;
+	      if (_gesture === 'zoom') {
+	        scale = k / tMini.k;
+	        tX = (_cMini[0] / scale - _cMini[0]) * scale;
+	        tY = (_cMini[1] / scale - _cMini[1]) * scale;
+	      } else {
+	        k = tMini.k;
+	        scale = 1;
+	        tX = x - tMini.x;
+	        tY = y - tMini.y;
+	      }
 
-	        reveal('.edit-menu',
-	            helpString('intro.buildings.square_building'),
-	            { padding: 50 }
-	        );
+	      utilSetTransform(tiles, tX, tY, scale);
+	      utilSetTransform(viewport, 0, 0, scale);
+	      _isTransformed = true;
+	      _tCurr = identity$2.translate(x, y).scale(k);
+	      var zMain = geoScaleToZoom(context.projection.scale());
+	      var zMini = geoScaleToZoom(k);
+	      _zDiff = zMain - zMini;
+	      queueRedraw();
+	    }
+
+	    function zoomEnded() {
+	      if (_skipEvents) return;
+	      if (_gesture !== 'pan') return;
+	      updateProjection();
+	      _gesture = null;
+	      context.map().center(projection.invert(_cMini)); // recenter main map..
+	    }
+
+	    function updateProjection() {
+	      var loc = context.map().center();
+	      var tMain = context.projection.transform();
+	      var zMain = geoScaleToZoom(tMain.k);
+	      var zMini = Math.max(zMain - _zDiff, 0.5);
+	      var kMini = geoZoomToScale(zMini);
+	      projection.translate([tMain.x, tMain.y]).scale(kMini);
+	      var point = projection(loc);
+	      var mouse = _gesture === 'pan' ? geoVecSubtract([_tCurr.x, _tCurr.y], [_tStart.x, _tStart.y]) : [0, 0];
+	      var xMini = _cMini[0] - point[0] + tMain.x + mouse[0];
+	      var yMini = _cMini[1] - point[1] + tMain.y + mouse[1];
+	      projection.translate([xMini, yMini]).clipExtent([[0, 0], _dMini]);
+	      _tCurr = projection.transform();
+
+	      if (_isTransformed) {
+	        utilSetTransform(tiles, 0, 0);
+	        utilSetTransform(viewport, 0, 0);
+	        _isTransformed = false;
+	      }
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'browse') {
-	                continueTo(rightClickHouse);
-	            } else if (mode.id === 'move' || mode.id === 'rotate') {
-	                continueTo(retryClickSquare);
-	            }
-	        });
+	      zoom.scaleExtent([geoZoomToScale(0.5), geoZoomToScale(zMain - 3)]);
+	      _skipEvents = true;
+	      wrap.call(zoom.transform, _tCurr);
+	      _skipEvents = false;
+	    }
 
-	        context.map().on('move.intro', function() {
-	            var node = selectMenuItem(context, 'orthogonalize').node();
-	            if (!wasChanged && !node) { return continueTo(rightClickHouse); }
+	    function redraw() {
+	      clearTimeout(_timeoutID);
+	      if (_isHidden) return;
+	      updateProjection();
+	      var zMini = geoScaleToZoom(projection.scale()); // setup tile container
 
-	            reveal('.edit-menu',
-	                helpString('intro.buildings.square_building'),
-	                { duration: 0, padding: 50 }
-	            );
-	        });
+	      tiles = wrap.selectAll('.map-in-map-tiles').data([0]);
+	      tiles = tiles.enter().append('div').attr('class', 'map-in-map-tiles').merge(tiles); // redraw background
 
-	        context.history().on('change.intro', function() {
-	            wasChanged = true;
-	            context.history().on('change.intro', null);
+	      backgroundLayer.source(context.background().baseLayerSource()).projection(projection).dimensions(_dMini);
+	      var background = tiles.selectAll('.map-in-map-background').data([0]);
+	      background.enter().append('div').attr('class', 'map-in-map-background').merge(background).call(backgroundLayer); // redraw overlay
 
-	            // Something changed.  Wait for transition to complete and check undo annotation.
-	            timeout(function() {
-	                if (context.history().undoAnnotation() === _t('operations.orthogonalize.annotation.feature.single')) {
-	                    continueTo(doneSquare);
-	                } else {
-	                    continueTo(retryClickSquare);
-	                }
-	            }, 500);  // after transitioned actions
-	        });
+	      var overlaySources = context.background().overlayLayerSources();
+	      var activeOverlayLayers = [];
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.map().on('move.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
+	      for (var i = 0; i < overlaySources.length; i++) {
+	        if (overlaySources[i].validZoom(zMini)) {
+	          if (!overlayLayers[i]) overlayLayers[i] = rendererTileLayer(context);
+	          activeOverlayLayers.push(overlayLayers[i].source(overlaySources[i]).projection(projection).dimensions(_dMini));
 	        }
-	    }
-
-
-	    function retryClickSquare() {
-	        context.enter(modeBrowse(context));
+	      }
 
-	        revealHouse(house, helpString('intro.buildings.retry_square'), {
-	            buttonText: _t('intro.ok'),
-	            buttonCallback: function() { continueTo(rightClickHouse); }
+	      var overlay = tiles.selectAll('.map-in-map-overlay').data([0]);
+	      overlay = overlay.enter().append('div').attr('class', 'map-in-map-overlay').merge(overlay);
+	      var overlays = overlay.selectAll('div').data(activeOverlayLayers, function (d) {
+	        return d.source().name();
+	      });
+	      overlays.exit().remove();
+	      overlays = overlays.enter().append('div').merge(overlays).each(function (layer) {
+	        select(this).call(layer);
+	      });
+	      var dataLayers = tiles.selectAll('.map-in-map-data').data([0]);
+	      dataLayers.exit().remove();
+	      dataLayers = dataLayers.enter().append('svg').attr('class', 'map-in-map-data').merge(dataLayers).call(dataLayer).call(debugLayer); // redraw viewport bounding box
+
+	      if (_gesture !== 'pan') {
+	        var getPath = d3_geoPath(projection);
+	        var bbox = {
+	          type: 'Polygon',
+	          coordinates: [context.map().extent().polygon()]
+	        };
+	        viewport = wrap.selectAll('.map-in-map-viewport').data([0]);
+	        viewport = viewport.enter().append('svg').attr('class', 'map-in-map-viewport').merge(viewport);
+	        var path = viewport.selectAll('.map-in-map-bbox').data([bbox]);
+	        path.enter().append('path').attr('class', 'map-in-map-bbox').merge(path).attr('d', getPath).classed('thick', function (d) {
+	          return getPath.area(d) < 30;
 	        });
-
-	        function continueTo(nextStep) {
-	            nextStep();
-	        }
+	      }
 	    }
 
+	    function queueRedraw() {
+	      clearTimeout(_timeoutID);
+	      _timeoutID = setTimeout(function () {
+	        redraw();
+	      }, 750);
+	    }
 
-	    function doneSquare() {
-	        context.history().checkpoint('doneSquare');
+	    function toggle(d3_event) {
+	      if (d3_event) d3_event.preventDefault();
+	      _isHidden = !_isHidden;
+	      context.container().select('.minimap-toggle-item').classed('active', !_isHidden).select('input').property('checked', !_isHidden);
 
-	        revealHouse(house, helpString('intro.buildings.done_square'), {
-	            buttonText: _t('intro.ok'),
-	            buttonCallback: function() { continueTo(addTank); }
+	      if (_isHidden) {
+	        wrap.style('display', 'block').style('opacity', '1').transition().duration(200).style('opacity', '0').on('end', function () {
+	          selection.selectAll('.map-in-map').style('display', 'none');
 	        });
-
-	        function continueTo(nextStep) {
-	            nextStep();
-	        }
+	      } else {
+	        wrap.style('display', 'block').style('opacity', '0').transition().duration(200).style('opacity', '1').on('end', function () {
+	          redraw();
+	        });
+	      }
 	    }
 
+	    uiMapInMap.toggle = toggle;
+	    wrap = selection.selectAll('.map-in-map').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'map-in-map').style('display', _isHidden ? 'none' : 'block').call(zoom).on('dblclick.zoom', null).merge(wrap); // reflow warning: Hardcode dimensions - currently can't resize it anyway..
 
-	    function addTank() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('doneSquare');
-	        _tankID = null;
-
-	        var msec = transitionTime(tank, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(tank, 19.5, msec);
-
-	        timeout(function() {
-	            reveal('button.add-area',
-	                helpString('intro.buildings.add_tank')
-	            );
+	    _dMini = [200, 150]; //utilGetDimensions(wrap);
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'add-area') { return; }
-	                continueTo(startTank);
-	            });
-	        }, msec + 100);
+	    _cMini = geoVecScale(_dMini, 0.5);
+	    context.map().on('drawn.map-in-map', function (drawn) {
+	      if (drawn.full === true) {
+	        redraw();
+	      }
+	    });
+	    redraw();
+	    context.keybinding().on(_t('background.minimap.key'), toggle);
+	  }
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	  return mapInMap;
+	}
 
+	function uiNotice(context) {
+	  return function (selection) {
+	    var div = selection.append('div').attr('class', 'notice');
+	    var button = div.append('button').attr('class', 'zoom-to notice fillD').on('click', function () {
+	      context.map().zoomEase(context.minEditableZoom());
+	    }).on('wheel', function (d3_event) {
+	      // let wheel events pass through #4482
+	      var e2 = new WheelEvent(d3_event.type, d3_event);
+	      context.surface().node().dispatchEvent(e2);
+	    });
+	    button.call(svgIcon('#iD-icon-plus', 'pre-text')).append('span').attr('class', 'label').html(_t.html('zoom_in_edit'));
 
-	    function startTank() {
-	        if (context.mode().id !== 'add-area') {
-	            return continueTo(addTank);
-	        }
+	    function disableTooHigh() {
+	      var canEdit = context.map().zoom() >= context.minEditableZoom();
+	      div.style('display', canEdit ? 'none' : 'block');
+	    }
 
-	        _tankID = null;
+	    context.map().on('move.notice', debounce(disableTooHigh, 500));
+	    disableTooHigh();
+	  };
+	}
 
-	        timeout(function() {
-	            var startString = helpString('intro.buildings.start_tank') +
-	                helpString('intro.buildings.tank_edge_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap'));
-	            revealTank(tank, startString);
+	function uiPhotoviewer(context) {
+	  var dispatch = dispatch$8('resize');
 
-	            context.map().on('move.intro drawn.intro', function() {
-	                revealTank(tank, startString, { duration: 0 });
-	            });
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'draw-area') { return chapter.restart(); }
-	                continueTo(continueTank);
-	            });
+	  function photoviewer(selection) {
+	    selection.append('button').attr('class', 'thumb-hide').on('click', function () {
+	      if (services.streetside) {
+	        services.streetside.hideViewer(context);
+	      }
 
-	        }, 550);  // after easing
+	      if (services.mapillary) {
+	        services.mapillary.hideViewer(context);
+	      }
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	      if (services.openstreetcam) {
+	        services.openstreetcam.hideViewer(context);
+	      }
+	    }).append('div').call(svgIcon('#iD-icon-close'));
+
+	    function preventDefault(d3_event) {
+	      d3_event.preventDefault();
+	    }
+
+	    selection.append('button').attr('class', 'resize-handle-xy').on('touchstart touchdown touchend', preventDefault).on(_pointerPrefix + 'down', buildResizeListener(selection, 'resize', dispatch, {
+	      resizeOnX: true,
+	      resizeOnY: true
+	    }));
+	    selection.append('button').attr('class', 'resize-handle-x').on('touchstart touchdown touchend', preventDefault).on(_pointerPrefix + 'down', buildResizeListener(selection, 'resize', dispatch, {
+	      resizeOnX: true
+	    }));
+	    selection.append('button').attr('class', 'resize-handle-y').on('touchstart touchdown touchend', preventDefault).on(_pointerPrefix + 'down', buildResizeListener(selection, 'resize', dispatch, {
+	      resizeOnY: true
+	    }));
+
+	    function buildResizeListener(target, eventName, dispatch, options) {
+	      var resizeOnX = !!options.resizeOnX;
+	      var resizeOnY = !!options.resizeOnY;
+	      var minHeight = options.minHeight || 240;
+	      var minWidth = options.minWidth || 320;
+	      var pointerId;
+	      var startX;
+	      var startY;
+	      var startWidth;
+	      var startHeight;
+
+	      function startResize(d3_event) {
+	        if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation();
+	        var mapSize = context.map().dimensions();
+
+	        if (resizeOnX) {
+	          var maxWidth = mapSize[0];
+	          var newWidth = clamp(startWidth + d3_event.clientX - startX, minWidth, maxWidth);
+	          target.style('width', newWidth + 'px');
+	        }
+
+	        if (resizeOnY) {
+	          var maxHeight = mapSize[1] - 90; // preserve space at top/bottom of map
+
+	          var newHeight = clamp(startHeight + startY - d3_event.clientY, minHeight, maxHeight);
+	          target.style('height', newHeight + 'px');
+	        }
+
+	        dispatch.call(eventName, target, utilGetDimensions(target, true));
+	      }
 
+	      function clamp(num, min, max) {
+	        return Math.max(min, Math.min(num, max));
+	      }
 
-	    function continueTank() {
-	        if (context.mode().id !== 'draw-area') {
-	            return continueTo(addTank);
-	        }
+	      function stopResize(d3_event) {
+	        if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation(); // remove all the listeners we added
 
-	        _tankID = null;
+	        select(window).on('.' + eventName, null);
+	      }
 
-	        var continueString = helpString('intro.buildings.continue_tank') + '{br}' +
-	            helpString('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) +
-	            helpString('intro.buildings.finish_tank');
+	      return function initResize(d3_event) {
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation();
+	        pointerId = d3_event.pointerId || 'mouse';
+	        startX = d3_event.clientX;
+	        startY = d3_event.clientY;
+	        var targetRect = target.node().getBoundingClientRect();
+	        startWidth = targetRect.width;
+	        startHeight = targetRect.height;
+	        select(window).on(_pointerPrefix + 'move.' + eventName, startResize, false).on(_pointerPrefix + 'up.' + eventName, stopResize, false);
 
-	        revealTank(tank, continueString);
+	        if (_pointerPrefix === 'pointer') {
+	          select(window).on('pointercancel.' + eventName, stopResize, false);
+	        }
+	      };
+	    }
+	  }
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            revealTank(tank, continueString, { duration: 0 });
-	        });
+	  photoviewer.onMapResize = function () {
+	    var photoviewer = context.container().select('.photoviewer');
+	    var content = context.container().select('.main-content');
+	    var mapDimensions = utilGetDimensions(content, true); // shrink photo viewer if it is too big
+	    // (-90 preserves space at top and bottom of map used by menus)
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'draw-area') {
-	                return;
-	            } else if (mode.id === 'select') {
-	                _tankID = context.selectedIDs()[0];
-	                return continueTo(searchPresetTank);
-	            } else {
-	                return continueTo(addTank);
-	            }
-	        });
+	    var photoDimensions = utilGetDimensions(photoviewer, true);
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    if (photoDimensions[0] > mapDimensions[0] || photoDimensions[1] > mapDimensions[1] - 90) {
+	      var setPhotoDimensions = [Math.min(photoDimensions[0], mapDimensions[0]), Math.min(photoDimensions[1], mapDimensions[1] - 90)];
+	      photoviewer.style('width', setPhotoDimensions[0] + 'px').style('height', setPhotoDimensions[1] + 'px');
+	      dispatch.call('resize', photoviewer, setPhotoDimensions);
 	    }
+	  };
 
+	  return utilRebind(photoviewer, dispatch, 'on');
+	}
 
-	    function searchPresetTank() {
-	        if (!_tankID || !context.hasEntity(_tankID)) {
-	            return addTank();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
-	            context.enter(modeSelect(context, [_tankID]));
-	        }
+	function uiRestore(context) {
+	  return function (selection) {
+	    if (!context.history().hasRestorableChanges()) return;
+	    var modalSelection = uiModal(selection, true);
+	    modalSelection.select('.modal').attr('class', 'modal fillL');
+	    var introModal = modalSelection.select('.content');
+	    introModal.append('div').attr('class', 'modal-section').append('h3').html(_t.html('restore.heading'));
+	    introModal.append('div').attr('class', 'modal-section').append('p').html(_t.html('restore.description'));
+	    var buttonWrap = introModal.append('div').attr('class', 'modal-actions');
+	    var restore = buttonWrap.append('button').attr('class', 'restore').on('click', function () {
+	      context.history().restore();
+	      modalSelection.remove();
+	    });
+	    restore.append('svg').attr('class', 'logo logo-restore').append('use').attr('xlink:href', '#iD-logo-restore');
+	    restore.append('div').html(_t.html('restore.restore'));
+	    var reset = buttonWrap.append('button').attr('class', 'reset').on('click', function () {
+	      context.history().clearSaved();
+	      modalSelection.remove();
+	    });
+	    reset.append('svg').attr('class', 'logo logo-reset').append('use').attr('xlink:href', '#iD-logo-reset');
+	    reset.append('div').html(_t.html('restore.reset'));
+	    restore.node().focus();
+	  };
+	}
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	function uiScale(context) {
+	  var projection = context.projection,
+	      isImperial = !_mainLocalizer.usesMetric(),
+	      maxLength = 180,
+	      tickHeight = 8;
+
+	  function scaleDefs(loc1, loc2) {
+	    var lat = (loc2[1] + loc1[1]) / 2,
+	        conversion = isImperial ? 3.28084 : 1,
+	        dist = geoLonToMeters(loc2[0] - loc1[0], lat) * conversion,
+	        scale = {
+	      dist: 0,
+	      px: 0,
+	      text: ''
+	    },
+	        buckets,
+	        i,
+	        val,
+	        dLon;
 
-	        timeout(function() {
-	            // reset pane, in case user somehow happened to change it..
-	            context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	    if (isImperial) {
+	      buckets = [5280000, 528000, 52800, 5280, 500, 50, 5, 1];
+	    } else {
+	      buckets = [5000000, 500000, 50000, 5000, 500, 50, 5, 1];
+	    } // determine a user-friendly endpoint for the scale
 
-	            context.container().select('.preset-search-input')
-	                .on('keydown.intro', null)
-	                .on('keyup.intro', checkPresetSearch);
 
-	            reveal('.preset-search-input',
-	                helpString('intro.buildings.search_tank', { preset: tankPreset.name() })
-	            );
-	        }, 400);  // after preset list pane visible..
+	    for (i = 0; i < buckets.length; i++) {
+	      val = buckets[i];
 
-	        context.on('enter.intro', function(mode) {
-	            if (!_tankID || !context.hasEntity(_tankID)) {
-	                return continueTo(addTank);
-	            }
+	      if (dist >= val) {
+	        scale.dist = Math.floor(dist / val) * val;
+	        break;
+	      } else {
+	        scale.dist = +dist.toFixed(2);
+	      }
+	    }
 
-	            var ids = context.selectedIDs();
-	            if (mode.id !== 'select' || !ids.length || ids[0] !== _tankID) {
-	                // keep the user's area selected..
-	                context.enter(modeSelect(context, [_tankID]));
+	    dLon = geoMetersToLon(scale.dist / conversion, lat);
+	    scale.px = Math.round(projection([loc1[0] + dLon, loc1[1]])[0]);
+	    scale.text = displayLength(scale.dist / conversion, isImperial);
+	    return scale;
+	  }
 
-	                // reset pane, in case user somehow happened to change it..
-	                context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
-	                // disallow scrolling
-	                context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	  function update(selection) {
+	    // choose loc1, loc2 along bottom of viewport (near where the scale will be drawn)
+	    var dims = context.map().dimensions(),
+	        loc1 = projection.invert([0, dims[1]]),
+	        loc2 = projection.invert([maxLength, dims[1]]),
+	        scale = scaleDefs(loc1, loc2);
+	    selection.select('.scale-path').attr('d', 'M0.5,0.5v' + tickHeight + 'h' + scale.px + 'v-' + tickHeight);
+	    selection.select('.scale-text').style(_mainLocalizer.textDirection() === 'ltr' ? 'left' : 'right', scale.px + 16 + 'px').html(scale.text);
+	  }
 
-	                context.container().select('.preset-search-input')
-	                    .on('keydown.intro', null)
-	                    .on('keyup.intro', checkPresetSearch);
+	  return function (selection) {
+	    function switchUnits() {
+	      isImperial = !isImperial;
+	      selection.call(update);
+	    }
 
-	                reveal('.preset-search-input',
-	                    helpString('intro.buildings.search_tank', { preset: tankPreset.name() })
-	                );
+	    var scalegroup = selection.append('svg').attr('class', 'scale').on('click', switchUnits).append('g').attr('transform', 'translate(10,11)');
+	    scalegroup.append('path').attr('class', 'scale-path');
+	    selection.append('div').attr('class', 'scale-text');
+	    selection.call(update);
+	    context.map().on('move.scale', function () {
+	      update(selection);
+	    });
+	  };
+	}
 
-	                context.history().on('change.intro', null);
-	            }
-	        });
+	function uiShortcuts(context) {
+	  var detected = utilDetect();
+	  var _activeTab = 0;
 
-	        function checkPresetSearch() {
-	            var first = context.container().select('.preset-list-item:first-child');
+	  var _modalSelection;
 
-	            if (first.classed('preset-man_made-storage_tank')) {
-	                reveal(first.select('.preset-list-button').node(),
-	                    helpString('intro.buildings.choose_tank', { preset: tankPreset.name() }),
-	                    { duration: 300 }
-	                );
+	  var _selection = select(null);
 
-	                context.container().select('.preset-search-input')
-	                    .on('keydown.intro', eventCancel, true)
-	                    .on('keyup.intro', null);
+	  var _dataShortcuts;
 
-	                context.history().on('change.intro', function() {
-	                    continueTo(closeEditorTank);
-	                });
-	            }
-	        }
+	  function shortcutsModal(_modalSelection) {
+	    _modalSelection.select('.modal').classed('modal-shortcuts', true);
 
-	        function continueTo(nextStep) {
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            context.on('enter.intro', null);
-	            context.history().on('change.intro', null);
-	            context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-	            nextStep();
-	        }
-	    }
+	    var content = _modalSelection.select('.content');
 
+	    content.append('div').attr('class', 'modal-section').append('h3').html(_t.html('shortcuts.title'));
+	    _mainFileFetcher.get('shortcuts').then(function (data) {
+	      _dataShortcuts = data;
+	      content.call(render);
+	    })["catch"](function () {
+	      /* ignore */
+	    });
+	  }
 
-	    function closeEditorTank() {
-	        if (!_tankID || !context.hasEntity(_tankID)) {
-	            return addTank();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
-	            context.enter(modeSelect(context, [_tankID]));
-	        }
+	  function render(selection) {
+	    if (!_dataShortcuts) return;
+	    var wrapper = selection.selectAll('.wrapper').data([0]);
+	    var wrapperEnter = wrapper.enter().append('div').attr('class', 'wrapper modal-section');
+	    var tabsBar = wrapperEnter.append('div').attr('class', 'tabs-bar');
+	    var shortcutsList = wrapperEnter.append('div').attr('class', 'shortcuts-list');
+	    wrapper = wrapper.merge(wrapperEnter);
+	    var tabs = tabsBar.selectAll('.tab').data(_dataShortcuts);
+	    var tabsEnter = tabs.enter().append('a').attr('class', 'tab').attr('href', '#').on('click', function (d3_event, d) {
+	      d3_event.preventDefault();
 
-	        context.history().checkpoint('hasTank');
+	      var i = _dataShortcuts.indexOf(d);
 
-	        context.on('exit.intro', function() {
-	            continueTo(rightClickTank);
-	        });
+	      _activeTab = i;
+	      render(selection);
+	    });
+	    tabsEnter.append('span').html(function (d) {
+	      return _t.html(d.text);
+	    }); // Update
 
-	        timeout(function() {
-	            reveal('.entity-editor-pane',
-	                helpString('intro.buildings.close', { button: icon('#iD-icon-close', 'pre-text') })
-	            );
-	        }, 500);
+	    wrapper.selectAll('.tab').classed('active', function (d, i) {
+	      return i === _activeTab;
+	    });
+	    var shortcuts = shortcutsList.selectAll('.shortcut-tab').data(_dataShortcuts);
+	    var shortcutsEnter = shortcuts.enter().append('div').attr('class', function (d) {
+	      return 'shortcut-tab shortcut-tab-' + d.tab;
+	    });
+	    var columnsEnter = shortcutsEnter.selectAll('.shortcut-column').data(function (d) {
+	      return d.columns;
+	    }).enter().append('table').attr('class', 'shortcut-column');
+	    var rowsEnter = columnsEnter.selectAll('.shortcut-row').data(function (d) {
+	      return d.rows;
+	    }).enter().append('tr').attr('class', 'shortcut-row');
+	    var sectionRows = rowsEnter.filter(function (d) {
+	      return !d.shortcuts;
+	    });
+	    sectionRows.append('td');
+	    sectionRows.append('td').attr('class', 'shortcut-section').append('h3').html(function (d) {
+	      return _t.html(d.text);
+	    });
+	    var shortcutRows = rowsEnter.filter(function (d) {
+	      return d.shortcuts;
+	    });
+	    var shortcutKeys = shortcutRows.append('td').attr('class', 'shortcut-keys');
+	    var modifierKeys = shortcutKeys.filter(function (d) {
+	      return d.modifiers;
+	    });
+	    modifierKeys.selectAll('kbd.modifier').data(function (d) {
+	      if (detected.os === 'win' && d.text === 'shortcuts.editing.commands.redo') {
+	        return ['⌘'];
+	      } else if (detected.os !== 'mac' && d.text === 'shortcuts.browsing.display_options.fullscreen') {
+	        return [];
+	      } else {
+	        return d.modifiers;
+	      }
+	    }).enter().each(function () {
+	      var selection = select(this);
+	      selection.append('kbd').attr('class', 'modifier').html(function (d) {
+	        return uiCmd.display(d);
+	      });
+	      selection.append('span').html('+');
+	    });
+	    shortcutKeys.selectAll('kbd.shortcut').data(function (d) {
+	      var arr = d.shortcuts;
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
-	    }
+	      if (detected.os === 'win' && d.text === 'shortcuts.editing.commands.redo') {
+	        arr = ['Y'];
+	      } else if (detected.os !== 'mac' && d.text === 'shortcuts.browsing.display_options.fullscreen') {
+	        arr = ['F11'];
+	      } // replace translations
 
 
-	    function rightClickTank() {
-	        if (!_tankID) { return continueTo(addTank); }
+	      arr = arr.map(function (s) {
+	        return uiCmd.display(s.indexOf('.') !== -1 ? _t(s) : s);
+	      });
+	      return utilArrayUniq(arr).map(function (s) {
+	        return {
+	          shortcut: s,
+	          separator: d.separator,
+	          suffix: d.suffix
+	        };
+	      });
+	    }).enter().each(function (d, i, nodes) {
+	      var selection = select(this);
+	      var click = d.shortcut.toLowerCase().match(/(.*).click/);
+
+	      if (click && click[1]) {
+	        // replace "left_click", "right_click" with mouse icon
+	        selection.call(svgIcon('#iD-walkthrough-mouse-' + click[1], 'operation'));
+	      } else if (d.shortcut.toLowerCase() === 'long-press') {
+	        selection.call(svgIcon('#iD-walkthrough-longpress', 'longpress operation'));
+	      } else if (d.shortcut.toLowerCase() === 'tap') {
+	        selection.call(svgIcon('#iD-walkthrough-tap', 'tap operation'));
+	      } else {
+	        selection.append('kbd').attr('class', 'shortcut').html(function (d) {
+	          return d.shortcut;
+	        });
+	      }
 
-	        context.enter(modeBrowse(context));
-	        context.history().reset('hasTank');
-	        context.map().centerEase(tank, 500);
-
-	        timeout(function() {
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'select') { return; }
-	                var ids = context.selectedIDs();
-	                if (ids.length !== 1 || ids[0] !== _tankID) { return; }
-
-	                timeout(function() {
-	                    var node = selectMenuItem(context, 'circularize').node();
-	                    if (!node) { return; }
-	                    continueTo(clickCircle);
-	                }, 50);  // after menu visible
-	            });
+	      if (i < nodes.length - 1) {
+	        selection.append('span').html(d.separator || "\xA0" + _t.html('shortcuts.or') + "\xA0");
+	      } else if (i === nodes.length - 1 && d.suffix) {
+	        selection.append('span').html(d.suffix);
+	      }
+	    });
+	    shortcutKeys.filter(function (d) {
+	      return d.gesture;
+	    }).each(function () {
+	      var selection = select(this);
+	      selection.append('span').html('+');
+	      selection.append('span').attr('class', 'gesture').html(function (d) {
+	        return _t.html(d.gesture);
+	      });
+	    });
+	    shortcutRows.append('td').attr('class', 'shortcut-desc').html(function (d) {
+	      return d.text ? _t.html(d.text) : "\xA0";
+	    }); // Update
 
-	            var rightclickString = helpString('intro.buildings.' + (context.lastPointerType() === 'mouse' ? 'rightclick_tank' : 'edit_menu_tank_touch'));
+	    wrapper.selectAll('.shortcut-tab').style('display', function (d, i) {
+	      return i === _activeTab ? 'flex' : 'none';
+	    });
+	  }
 
-	            revealTank(tank, rightclickString);
+	  return function (selection, show) {
+	    _selection = selection;
 
-	            context.map().on('move.intro drawn.intro', function() {
-	                revealTank(tank, rightclickString, { duration: 0 });
-	            });
+	    if (show) {
+	      _modalSelection = uiModal(selection);
 
-	            context.history().on('change.intro', function() {
-	                continueTo(rightClickTank);
-	            });
+	      _modalSelection.call(shortcutsModal);
+	    } else {
+	      context.keybinding().on([_t('shortcuts.toggle.key'), '?'], function () {
+	        if (context.container().selectAll('.modal-shortcuts').size()) {
+	          // already showing
+	          if (_modalSelection) {
+	            _modalSelection.close();
 
-	        }, 600);
+	            _modalSelection = null;
+	          }
+	        } else {
+	          _modalSelection = uiModal(_selection);
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
+	          _modalSelection.call(shortcutsModal);
 	        }
+	      });
 	    }
+	  };
+	}
 
+	function uiDataHeader() {
+	  var _datum;
 
-	    function clickCircle() {
-	        if (!_tankID) { return chapter.restart(); }
-	        var entity = context.hasEntity(_tankID);
-	        if (!entity) { return continueTo(rightClickTank); }
-
-	        var node = selectMenuItem(context, 'circularize').node();
-	        if (!node) { return continueTo(rightClickTank); }
+	  function dataHeader(selection) {
+	    var header = selection.selectAll('.data-header').data(_datum ? [_datum] : [], function (d) {
+	      return d.__featurehash__;
+	    });
+	    header.exit().remove();
+	    var headerEnter = header.enter().append('div').attr('class', 'data-header');
+	    var iconEnter = headerEnter.append('div').attr('class', 'data-header-icon');
+	    iconEnter.append('div').attr('class', 'preset-icon-28').call(svgIcon('#iD-icon-data', 'note-fill'));
+	    headerEnter.append('div').attr('class', 'data-header-label').html(_t.html('map_data.layers.custom.title'));
+	  }
 
-	        var wasChanged = false;
+	  dataHeader.datum = function (val) {
+	    if (!arguments.length) return _datum;
+	    _datum = val;
+	    return this;
+	  };
 
-	        reveal('.edit-menu',
-	            helpString('intro.buildings.circle_tank'),
-	            { padding: 50 }
-	        );
+	  return dataHeader;
+	}
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'browse') {
-	                continueTo(rightClickTank);
-	            } else if (mode.id === 'move' || mode.id === 'rotate') {
-	                continueTo(retryClickCircle);
-	            }
-	        });
+	// It is keyed on the `value` of the entry. Data should be an array of objects like:
+	//   [{
+	//       value:   'string value',  // required
+	//       display: 'label html'     // optional
+	//       title:   'hover text'     // optional
+	//       terms:   ['search terms'] // optional
+	//   }, ...]
 
-	        context.map().on('move.intro', function() {
-	            var node = selectMenuItem(context, 'circularize').node();
-	            if (!wasChanged && !node) { return continueTo(rightClickTank); }
+	var _comboHideTimerID;
 
-	            reveal('.edit-menu',
-	                helpString('intro.buildings.circle_tank'),
-	                { duration: 0, padding: 50 }
-	            );
-	        });
+	function uiCombobox(context, klass) {
+	  var dispatch = dispatch$8('accept', 'cancel');
+	  var container = context.container();
+	  var _suggestions = [];
+	  var _data = [];
+	  var _fetched = {};
+	  var _selected = null;
+	  var _canAutocomplete = true;
+	  var _caseSensitive = false;
+	  var _cancelFetch = false;
+	  var _minItems = 2;
+	  var _tDown = 0;
+
+	  var _mouseEnterHandler, _mouseLeaveHandler;
+
+	  var _fetcher = function _fetcher(val, cb) {
+	    cb(_data.filter(function (d) {
+	      var terms = d.terms || [];
+	      terms.push(d.value);
+	      return terms.some(function (term) {
+	        return term.toString().toLowerCase().indexOf(val.toLowerCase()) !== -1;
+	      });
+	    }));
+	  };
 
-	        context.history().on('change.intro', function() {
-	            wasChanged = true;
-	            context.history().on('change.intro', null);
+	  var combobox = function combobox(input, attachTo) {
+	    if (!input || input.empty()) return;
+	    input.classed('combobox-input', true).on('focus.combo-input', focus).on('blur.combo-input', blur).on('keydown.combo-input', keydown).on('keyup.combo-input', keyup).on('input.combo-input', change).on('mousedown.combo-input', mousedown).each(function () {
+	      var parent = this.parentNode;
+	      var sibling = this.nextSibling;
+	      select(parent).selectAll('.combobox-caret').filter(function (d) {
+	        return d === input.node();
+	      }).data([input.node()]).enter().insert('div', function () {
+	        return sibling;
+	      }).attr('class', 'combobox-caret').on('mousedown.combo-caret', function (d3_event) {
+	        d3_event.preventDefault(); // don't steal focus from input
 
-	            // Something changed.  Wait for transition to complete and check undo annotation.
-	            timeout(function() {
-	                if (context.history().undoAnnotation() === _t('operations.circularize.annotation.single')) {
-	                    continueTo(play);
-	                } else {
-	                    continueTo(retryClickCircle);
-	                }
-	            }, 500);  // after transitioned actions
-	        });
+	        input.node().focus(); // focus the input as if it was clicked
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.map().on('move.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	        mousedown(d3_event);
+	      }).on('mouseup.combo-caret', function (d3_event) {
+	        d3_event.preventDefault(); // don't steal focus from input
 
+	        mouseup(d3_event);
+	      });
+	    });
 
-	    function retryClickCircle() {
-	        context.enter(modeBrowse(context));
+	    function mousedown(d3_event) {
+	      if (d3_event.button !== 0) return; // left click only
 
-	        revealTank(tank, helpString('intro.buildings.retry_circle'), {
-	            buttonText: _t('intro.ok'),
-	            buttonCallback: function() { continueTo(rightClickTank); }
-	        });
+	      _tDown = +new Date(); // clear selection
 
-	        function continueTo(nextStep) {
-	            nextStep();
-	        }
-	    }
+	      var start = input.property('selectionStart');
+	      var end = input.property('selectionEnd');
 
+	      if (start !== end) {
+	        var val = utilGetSetValue(input);
+	        input.node().setSelectionRange(val.length, val.length);
+	        return;
+	      }
 
-	    function play() {
-	        dispatch$1.call('done');
-	        reveal('.ideditor',
-	            helpString('intro.buildings.play', { next: _t('intro.startediting.title') }), {
-	                tooltipBox: '.intro-nav-wrap .chapter-startEditing',
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { reveal('.ideditor'); }
-	            }
-	        );
+	      input.on('mouseup.combo-input', mouseup);
 	    }
 
+	    function mouseup(d3_event) {
+	      input.on('mouseup.combo-input', null);
+	      if (d3_event.button !== 0) return; // left click only
 
-	    chapter.enter = function() {
-	        addHouse();
-	    };
-
-
-	    chapter.exit = function() {
-	        timeouts.forEach(window.clearTimeout);
-	        context.on('enter.intro exit.intro', null);
-	        context.map().on('move.intro drawn.intro', null);
-	        context.history().on('change.intro', null);
-	        context.container().select('.inspector-wrap').on('wheel.intro', null);
-	        context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-	        context.container().select('.more-fields .combobox-input').on('click.intro', null);
-	    };
+	      if (input.node() !== document.activeElement) return; // exit if this input is not focused
 
+	      var start = input.property('selectionStart');
+	      var end = input.property('selectionEnd');
+	      if (start !== end) return; // exit if user is selecting
+	      // not showing or showing for a different field - try to show it.
 
-	    chapter.restart = function() {
-	        chapter.exit();
-	        chapter.enter();
-	    };
+	      var combo = container.selectAll('.combobox');
 
+	      if (combo.empty() || combo.datum() !== input.node()) {
+	        var tOrig = _tDown;
+	        window.setTimeout(function () {
+	          if (tOrig !== _tDown) return; // exit if user double clicked
 
-	    return utilRebind(chapter, dispatch$1, 'on');
-	}
+	          fetchComboData('', function () {
+	            show();
+	            render();
+	          });
+	        }, 250);
+	      } else {
+	        hide();
+	      }
+	    }
 
-	function uiIntroStartEditing(context, reveal) {
-	    var dispatch$1 = dispatch('done', 'startEditing');
-	    var modalSelection = select(null);
+	    function focus() {
+	      fetchComboData(''); // prefetch values (may warm taginfo cache)
+	    }
 
+	    function blur() {
+	      _comboHideTimerID = window.setTimeout(hide, 75);
+	    }
 
-	    var chapter = {
-	        title: 'intro.startediting.title'
-	    };
+	    function show() {
+	      hide(); // remove any existing
 
-	    function showHelp() {
-	        reveal('.map-control.help-control',
-	            helpString('intro.startediting.help'), {
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { shortcuts(); }
-	            }
-	        );
+	      container.insert('div', ':first-child').datum(input.node()).attr('class', 'combobox' + (klass ? ' combobox-' + klass : '')).style('position', 'absolute').style('display', 'block').style('left', '0px').on('mousedown.combo-container', function (d3_event) {
+	        // prevent moving focus out of the input field
+	        d3_event.preventDefault();
+	      });
+	      container.on('scroll.combo-scroll', render, true);
 	    }
 
-	    function shortcuts() {
-	        reveal('.map-control.help-control',
-	            helpString('intro.startediting.shortcuts'), {
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { showSave(); }
-	            }
-	        );
-	    }
+	    function hide() {
+	      if (_comboHideTimerID) {
+	        window.clearTimeout(_comboHideTimerID);
+	        _comboHideTimerID = undefined;
+	      }
 
-	    function showSave() {
-	        context.container().selectAll('.shaded').remove();  // in case user opened keyboard shortcuts
-	        reveal('.top-toolbar button.save',
-	            helpString('intro.startediting.save'), {
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { showStart(); }
-	            }
-	        );
+	      container.selectAll('.combobox').remove();
+	      container.on('scroll.combo-scroll', null);
 	    }
 
-	    function showStart() {
-	        context.container().selectAll('.shaded').remove();  // in case user opened keyboard shortcuts
-
-	        modalSelection = uiModal(context.container());
+	    function keydown(d3_event) {
+	      var shown = !container.selectAll('.combobox').empty();
+	      var tagName = input.node() ? input.node().tagName.toLowerCase() : '';
 
-	        modalSelection.select('.modal')
-	            .attr('class', 'modal-splash modal');
+	      switch (d3_event.keyCode) {
+	        case 8: // ⌫ Backspace
 
-	        modalSelection.selectAll('.close').remove();
+	        case 46:
+	          // ⌦ Delete
+	          d3_event.stopPropagation();
+	          _selected = null;
+	          render();
+	          input.on('input.combo-input', function () {
+	            var start = input.property('selectionStart');
+	            input.node().setSelectionRange(start, start);
+	            input.on('input.combo-input', change);
+	          });
+	          break;
 
-	        var startbutton = modalSelection.select('.content')
-	            .attr('class', 'fillL')
-	            .append('button')
-	                .attr('class', 'modal-section huge-modal-button')
-	                .on('click', function() {
-	                    modalSelection.remove();
-	                });
+	        case 9:
+	          // ⇥ Tab
+	          accept();
+	          break;
 
-	            startbutton
-	                .append('svg')
-	                .attr('class', 'illustration')
-	                .append('use')
-	                .attr('xlink:href', '#iD-logo-walkthrough');
+	        case 13:
+	          // ↩ Return
+	          d3_event.preventDefault();
+	          d3_event.stopPropagation();
+	          break;
 
-	            startbutton
-	                .append('h2')
-	                .text(_t('intro.startediting.start'));
+	        case 38:
+	          // ↑ Up arrow
+	          if (tagName === 'textarea' && !shown) return;
+	          d3_event.preventDefault();
 
-	        dispatch$1.call('startEditing');
-	    }
+	          if (tagName === 'input' && !shown) {
+	            show();
+	          }
 
+	          nav(-1);
+	          break;
 
-	    chapter.enter = function() {
-	        showHelp();
-	    };
+	        case 40:
+	          // ↓ Down arrow
+	          if (tagName === 'textarea' && !shown) return;
+	          d3_event.preventDefault();
 
+	          if (tagName === 'input' && !shown) {
+	            show();
+	          }
 
-	    chapter.exit = function() {
-	        modalSelection.remove();
-	        context.container().selectAll('.shaded').remove();  // in case user opened keyboard shortcuts
-	    };
+	          nav(+1);
+	          break;
+	      }
+	    }
 
+	    function keyup(d3_event) {
+	      switch (d3_event.keyCode) {
+	        case 27:
+	          // ⎋ Escape
+	          cancel();
+	          break;
 
-	    return utilRebind(chapter, dispatch$1, 'on');
-	}
+	        case 13:
+	          // ↩ Return
+	          accept();
+	          break;
+	      }
+	    } // Called whenever the input value is changed (e.g. on typing)
 
-	var chapterUi = {
-	  welcome: uiIntroWelcome,
-	  navigation: uiIntroNavigation,
-	  point: uiIntroPoint,
-	  area: uiIntroArea,
-	  line: uiIntroLine,
-	  building: uiIntroBuilding,
-	  startEditing: uiIntroStartEditing
-	};
 
-	var chapterFlow = [
-	  'welcome',
-	  'navigation',
-	  'point',
-	  'area',
-	  'line',
-	  'building',
-	  'startEditing'
-	];
+	    function change() {
+	      fetchComboData(value(), function () {
+	        _selected = null;
+	        var val = input.property('value');
 
+	        if (_suggestions.length) {
+	          if (input.property('selectionEnd') === val.length) {
+	            _selected = tryAutocomplete();
+	          }
 
-	function uiIntro(context) {
-	  var INTRO_IMAGERY = 'EsriWorldImageryClarity';
-	  var _introGraph = {};
-	  var _currChapter;
+	          if (!_selected) {
+	            _selected = val;
+	          }
+	        }
 
+	        if (val.length) {
+	          var combo = container.selectAll('.combobox');
 
-	  function intro(selection) {
-	    _mainFileFetcher.get('intro_graph')
-	      .then(function (dataIntroGraph) {
-	        // create entities for intro graph and localize names
-	        for (var id in dataIntroGraph) {
-	          if (!_introGraph[id]) {
-	            _introGraph[id] = osmEntity(localize(dataIntroGraph[id]));
+	          if (combo.empty()) {
+	            show();
 	          }
+	        } else {
+	          hide();
 	        }
-	        selection.call(startIntro);
-	      })
-	      .catch(function() { /* ignore */ });
-	  }
 
+	        render();
+	      });
+	    } // Called when the user presses up/down arrows to navigate the list
 
-	  function startIntro(selection) {
-	    context.enter(modeBrowse(context));
 
-	    // Save current map state
-	    var osm = context.connection();
-	    var history = context.history().toJSON();
-	    var hash = window.location.hash;
-	    var center = context.map().center();
-	    var zoom = context.map().zoom();
-	    var background = context.background().baseLayerSource();
-	    var overlays = context.background().overlayLayerSources();
-	    var opacity = context.container().selectAll('.main-map .layer-background').style('opacity');
-	    var caches = osm && osm.caches();
-	    var baseEntities = context.history().graph().base().entities;
+	    function nav(dir) {
+	      if (_suggestions.length) {
+	        // try to determine previously selected index..
+	        var index = -1;
 
-	    // Show sidebar and disable the sidebar resizing button
-	    // (this needs to be before `context.inIntro(true)`)
-	    context.ui().sidebar.expand();
-	    context.container().selectAll('button.sidebar-toggle').classed('disabled', true);
+	        for (var i = 0; i < _suggestions.length; i++) {
+	          if (_selected && _suggestions[i].value === _selected) {
+	            index = i;
+	            break;
+	          }
+	        } // pick new _selected
 
-	    // Block saving
-	    context.inIntro(true);
 
-	    // Load semi-real data used in intro
-	    if (osm) { osm.toggle(false).reset(); }
-	    context.history().reset();
-	    context.history().merge(Object.values(coreGraph().load(_introGraph).entities));
-	    context.history().checkpoint('initial');
+	        index = Math.max(Math.min(index + dir, _suggestions.length - 1), 0);
+	        _selected = _suggestions[index].value;
+	        input.property('value', _selected);
+	      }
 
-	    // Setup imagery
-	    var imagery = context.background().findSource(INTRO_IMAGERY);
-	    if (imagery) {
-	      context.background().baseLayerSource(imagery);
-	    } else {
-	      context.background().bing();
+	      render();
+	      ensureVisible();
 	    }
-	    overlays.forEach(function (d) { return context.background().toggleOverlayLayer(d); });
 
-	    // Setup data layers (only OSM)
-	    var layers = context.layers();
-	    layers.all().forEach(function (item) {
-	      // if the layer has the function `enabled`
-	      if (typeof item.layer.enabled === 'function') {
-	        item.layer.enabled(item.id === 'osm');
-	      }
-	    });
+	    function ensureVisible() {
+	      var combo = container.selectAll('.combobox');
+	      if (combo.empty()) return;
+	      var containerRect = container.node().getBoundingClientRect();
+	      var comboRect = combo.node().getBoundingClientRect();
 
+	      if (comboRect.bottom > containerRect.bottom) {
+	        var node = attachTo ? attachTo.node() : input.node();
+	        node.scrollIntoView({
+	          behavior: 'instant',
+	          block: 'center'
+	        });
+	        render();
+	      } // https://stackoverflow.com/questions/11039885/scrollintoview-causing-the-whole-page-to-move
 
-	    context.container().selectAll('.main-map .layer-background').style('opacity', 1);
 
-	    var curtain = uiCurtain(context.container().node());
-	    selection.call(curtain);
+	      var selected = combo.selectAll('.combobox-option.selected').node();
 
-	    // Store that the user started the walkthrough..
-	    corePreferences('walkthrough_started', 'yes');
+	      if (selected) {
+	        selected.scrollIntoView({
+	          behavior: 'smooth',
+	          block: 'nearest'
+	        });
+	      }
+	    }
 
-	    // Restore previous walkthrough progress..
-	    var storedProgress = corePreferences('walkthrough_progress') || '';
-	    var progress = storedProgress.split(';').filter(Boolean);
+	    function value() {
+	      var value = input.property('value');
+	      var start = input.property('selectionStart');
+	      var end = input.property('selectionEnd');
 
-	    var chapters = chapterFlow.map(function (chapter, i) {
-	      var s = chapterUi[chapter](context, curtain.reveal)
-	        .on('done', function () {
+	      if (start && end) {
+	        value = value.substring(0, start);
+	      }
 
-	          buttons
-	            .filter(function (d) { return d.title === s.title; })
-	            .classed('finished', true);
+	      return value;
+	    }
 
-	          if (i < chapterFlow.length - 1) {
-	            var next = chapterFlow[i + 1];
-	            context.container().select(("button.chapter-" + next))
-	              .classed('next', true);
-	          }
+	    function fetchComboData(v, cb) {
+	      _cancelFetch = false;
 
-	          // Store walkthrough progress..
-	          progress.push(chapter);
-	          corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';'));
+	      _fetcher.call(input, v, function (results) {
+	        // already chose a value, don't overwrite or autocomplete it
+	        if (_cancelFetch) return;
+	        _suggestions = results;
+	        results.forEach(function (d) {
+	          _fetched[d.value] = d;
 	        });
-	      return s;
-	    });
 
-	    chapters[chapters.length - 1].on('startEditing', function () {
-	      // Store walkthrough progress..
-	      progress.push('startEditing');
-	      corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';'));
+	        if (cb) {
+	          cb();
+	        }
+	      });
+	    }
 
-	      // Store if walkthrough is completed..
-	      var incomplete = utilArrayDifference(chapterFlow, progress);
-	      if (!incomplete.length) {
-	        corePreferences('walkthrough_completed', 'yes');
+	    function tryAutocomplete() {
+	      if (!_canAutocomplete) return;
+	      var val = _caseSensitive ? value() : value().toLowerCase();
+	      if (!val) return; // Don't autocomplete if user is typing a number - #4935
+
+	      if (!isNaN(parseFloat(val)) && isFinite(val)) return;
+	      var bestIndex = -1;
+
+	      for (var i = 0; i < _suggestions.length; i++) {
+	        var suggestion = _suggestions[i].value;
+	        var compare = _caseSensitive ? suggestion : suggestion.toLowerCase(); // if search string matches suggestion exactly, pick it..
+
+	        if (compare === val) {
+	          bestIndex = i;
+	          break; // otherwise lock in the first result that starts with the search string..
+	        } else if (bestIndex === -1 && compare.indexOf(val) === 0) {
+	          bestIndex = i;
+	        }
 	      }
 
-	      curtain.remove();
-	      navwrap.remove();
-	      context.container().selectAll('.main-map .layer-background').style('opacity', opacity);
-	      context.container().selectAll('button.sidebar-toggle').classed('disabled', false);
-	      if (osm) { osm.toggle(true).reset().caches(caches); }
-	      context.history().reset().merge(Object.values(baseEntities));
-	      context.background().baseLayerSource(background);
-	      overlays.forEach(function (d) { return context.background().toggleOverlayLayer(d); });
-	      if (history) { context.history().fromJSON(history, false); }
-	      context.map().centerZoom(center, zoom);
-	      window.location.replace(hash);
-	      context.inIntro(false);
-	    });
+	      if (bestIndex !== -1) {
+	        var bestVal = _suggestions[bestIndex].value;
+	        input.property('value', bestVal);
+	        input.node().setSelectionRange(val.length, bestVal.length);
+	        return bestVal;
+	      }
+	    }
 
-	    var navwrap = selection
-	      .append('div')
-	      .attr('class', 'intro-nav-wrap fillD');
+	    function render() {
+	      if (_suggestions.length < _minItems || document.activeElement !== input.node()) {
+	        hide();
+	        return;
+	      }
 
-	    navwrap
-	      .append('svg')
-	      .attr('class', 'intro-nav-wrap-logo')
-	      .append('use')
-	      .attr('xlink:href', '#iD-logo-walkthrough');
+	      var shown = !container.selectAll('.combobox').empty();
+	      if (!shown) return;
+	      var combo = container.selectAll('.combobox');
+	      var options = combo.selectAll('.combobox-option').data(_suggestions, function (d) {
+	        return d.value;
+	      });
+	      options.exit().remove(); // enter/update
+
+	      options.enter().append('a').attr('class', function (d) {
+	        return 'combobox-option ' + (d.klass || '');
+	      }).attr('title', function (d) {
+	        return d.title;
+	      }).html(function (d) {
+	        return d.display || d.value;
+	      }).on('mouseenter', _mouseEnterHandler).on('mouseleave', _mouseLeaveHandler).merge(options).classed('selected', function (d) {
+	        return d.value === _selected;
+	      }).on('click.combo-option', accept).order();
+	      var node = attachTo ? attachTo.node() : input.node();
+	      var containerRect = container.node().getBoundingClientRect();
+	      var rect = node.getBoundingClientRect();
+	      combo.style('left', rect.left + 5 - containerRect.left + 'px').style('width', rect.width - 10 + 'px').style('top', rect.height + rect.top - containerRect.top + 'px');
+	    } // Dispatches an 'accept' event
+	    // Then hides the combobox.
+
+
+	    function accept(d3_event, d) {
+	      _cancelFetch = true;
+	      var thiz = input.node();
+
+	      if (d) {
+	        // user clicked on a suggestion
+	        utilGetSetValue(input, d.value); // replace field contents
+
+	        utilTriggerEvent(input, 'change');
+	      } // clear (and keep) selection
+
+
+	      var val = utilGetSetValue(input);
+	      thiz.setSelectionRange(val.length, val.length);
+	      d = _fetched[val];
+	      dispatch.call('accept', thiz, d, val);
+	      hide();
+	    } // Dispatches an 'cancel' event
+	    // Then hides the combobox.
 
-	    var buttonwrap = navwrap
-	      .append('div')
-	      .attr('class', 'joined')
-	      .selectAll('button.chapter');
 
-	    var buttons = buttonwrap
-	      .data(chapters)
-	      .enter()
-	      .append('button')
-	      .attr('class', function (d, i) { return ("chapter chapter-" + (chapterFlow[i])); })
-	      .on('click', enterChapter);
+	    function cancel() {
+	      _cancelFetch = true;
+	      var thiz = input.node(); // clear (and remove) selection, and replace field contents
 
-	    buttons
-	      .append('span')
-	      .text(function (d) { return _t(d.title); });
+	      var val = utilGetSetValue(input);
+	      var start = input.property('selectionStart');
+	      var end = input.property('selectionEnd');
+	      val = val.slice(0, start) + val.slice(end);
+	      utilGetSetValue(input, val);
+	      thiz.setSelectionRange(val.length, val.length);
+	      dispatch.call('cancel', thiz);
+	      hide();
+	    }
+	  };
 
-	    buttons
-	      .append('span')
-	      .attr('class', 'status')
-	      .call(svgIcon((_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward'), 'inline'));
+	  combobox.canAutocomplete = function (val) {
+	    if (!arguments.length) return _canAutocomplete;
+	    _canAutocomplete = val;
+	    return combobox;
+	  };
 
-	    enterChapter(chapters[0]);
+	  combobox.caseSensitive = function (val) {
+	    if (!arguments.length) return _caseSensitive;
+	    _caseSensitive = val;
+	    return combobox;
+	  };
 
+	  combobox.data = function (val) {
+	    if (!arguments.length) return _data;
+	    _data = val;
+	    return combobox;
+	  };
 
-	    function enterChapter(newChapter) {
-	      if (_currChapter) { _currChapter.exit(); }
-	      context.enter(modeBrowse(context));
+	  combobox.fetcher = function (val) {
+	    if (!arguments.length) return _fetcher;
+	    _fetcher = val;
+	    return combobox;
+	  };
 
-	      _currChapter = newChapter;
-	      _currChapter.enter();
+	  combobox.minItems = function (val) {
+	    if (!arguments.length) return _minItems;
+	    _minItems = val;
+	    return combobox;
+	  };
 
-	      buttons
-	        .classed('next', false)
-	        .classed('active', function (d) { return d.title === _currChapter.title; });
-	    }
-	  }
+	  combobox.itemsMouseEnter = function (val) {
+	    if (!arguments.length) return _mouseEnterHandler;
+	    _mouseEnterHandler = val;
+	    return combobox;
+	  };
 
+	  combobox.itemsMouseLeave = function (val) {
+	    if (!arguments.length) return _mouseLeaveHandler;
+	    _mouseLeaveHandler = val;
+	    return combobox;
+	  };
 
-	  return intro;
+	  return utilRebind(combobox, dispatch, 'on');
 	}
 
-	function uiIssuesInfo(context) {
-
-	    var warningsItem = {
-	        id: 'warnings',
-	        count: 0,
-	        iconID: 'iD-icon-alert',
-	        descriptionID: 'issues.warnings_and_errors'
-	    };
+	uiCombobox.off = function (input, context) {
+	  input.on('focus.combo-input', null).on('blur.combo-input', null).on('keydown.combo-input', null).on('keyup.combo-input', null).on('input.combo-input', null).on('mousedown.combo-input', null).on('mouseup.combo-input', null);
+	  context.container().on('scroll.combo-scroll', null);
+	};
 
-	    var resolvedItem = {
-	        id: 'resolved',
-	        count: 0,
-	        iconID: 'iD-icon-apply',
-	        descriptionID: 'issues.user_resolved_issues'
-	    };
+	function uiDisclosure(context, key, expandedDefault) {
+	  var dispatch = dispatch$8('toggled');
 
-	    function update(selection) {
+	  var _expanded;
 
-	        var shownItems = [];
+	  var _label = utilFunctor('');
 
-	        var liveIssues = context.validator().getIssues({
-	            what: corePreferences('validate-what') || 'edited',
-	            where: corePreferences('validate-where') || 'all'
-	        });
-	        if (liveIssues.length) {
-	            warningsItem.count = liveIssues.length;
-	            shownItems.push(warningsItem);
-	        }
+	  var _updatePreference = true;
 
-	        if (corePreferences('validate-what') === 'all') {
-	            var resolvedIssues = context.validator().getResolvedIssues();
-	            if (resolvedIssues.length) {
-	                resolvedItem.count = resolvedIssues.length;
-	                shownItems.push(resolvedItem);
-	            }
-	        }
+	  var _content = function _content() {};
 
-	        var chips = selection.selectAll('.chip')
-	            .data(shownItems, function(d) {
-	                return d.id;
-	            });
+	  var disclosure = function disclosure(selection) {
+	    if (_expanded === undefined || _expanded === null) {
+	      // loading _expanded here allows it to be reset by calling `disclosure.expanded(null)`
+	      var preference = corePreferences('disclosure.' + key + '.expanded');
+	      _expanded = preference === null ? !!expandedDefault : preference === 'true';
+	    }
 
-	        chips.exit().remove();
+	    var hideToggle = selection.selectAll('.hide-toggle-' + key).data([0]); // enter
 
-	        var enter = chips.enter()
-	            .append('a')
-	            .attr('class', function(d) {
-	                return 'chip ' + d.id + '-count';
-	            })
-	            .attr('href', '#')
-	            .attr('tabindex', -1)
-	            .each(function(d) {
+	    var hideToggleEnter = hideToggle.enter().append('a').attr('href', '#').attr('class', 'hide-toggle hide-toggle-' + key).call(svgIcon('', 'pre-text', 'hide-toggle-icon'));
+	    hideToggleEnter.append('span').attr('class', 'hide-toggle-text'); // update
 
-	                var chipSelection = select(this);
+	    hideToggle = hideToggleEnter.merge(hideToggle);
+	    hideToggle.on('click', toggle).classed('expanded', _expanded);
+	    hideToggle.selectAll('.hide-toggle-text').html(_label());
+	    hideToggle.selectAll('.hide-toggle-icon').attr('xlink:href', _expanded ? '#iD-icon-down' : _mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward');
+	    var wrap = selection.selectAll('.disclosure-wrap').data([0]); // enter/update
 
-	                var tooltipBehavior = uiTooltip()
-	                    .placement('top')
-	                    .title(_t(d.descriptionID));
+	    wrap = wrap.enter().append('div').attr('class', 'disclosure-wrap disclosure-wrap-' + key).merge(wrap).classed('hide', !_expanded);
 
-	                chipSelection
-	                    .call(tooltipBehavior)
-	                    .on('click', function() {
-	                        event.preventDefault();
+	    if (_expanded) {
+	      wrap.call(_content);
+	    }
 
-	                        tooltipBehavior.hide(select(this));
-	                        // open the Issues pane
-	                        context.ui().togglePanes(context.container().select('.map-panes .issues-pane'));
-	                    });
+	    function toggle(d3_event) {
+	      d3_event.preventDefault();
+	      _expanded = !_expanded;
 
-	                chipSelection.call(svgIcon('#' + d.iconID));
+	      if (_updatePreference) {
+	        corePreferences('disclosure.' + key + '.expanded', _expanded);
+	      }
 
-	            });
+	      hideToggle.classed('expanded', _expanded);
+	      hideToggle.selectAll('.hide-toggle-icon').attr('xlink:href', _expanded ? '#iD-icon-down' : _mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward');
+	      wrap.call(uiToggle(_expanded));
 
-	        enter.append('span')
-	            .attr('class', 'count');
+	      if (_expanded) {
+	        wrap.call(_content);
+	      }
 
-	        enter.merge(chips)
-	            .selectAll('span.count')
-	            .text(function(d) {
-	                return d.count.toString();
-	            });
+	      dispatch.call('toggled', this, _expanded);
 	    }
+	  };
 
+	  disclosure.label = function (val) {
+	    if (!arguments.length) return _label;
+	    _label = utilFunctor(val);
+	    return disclosure;
+	  };
 
-	    return function(selection) {
-	        update(selection);
+	  disclosure.expanded = function (val) {
+	    if (!arguments.length) return _expanded;
+	    _expanded = val;
+	    return disclosure;
+	  };
 
-	        context.validator().on('validated.infobox', function() {
-	            update(selection);
-	        });
-	    };
+	  disclosure.updatePreference = function (val) {
+	    if (!arguments.length) return _updatePreference;
+	    _updatePreference = val;
+	    return disclosure;
+	  };
+
+	  disclosure.content = function (val) {
+	    if (!arguments.length) return _content;
+	    _content = val;
+	    return disclosure;
+	  };
+
+	  return utilRebind(disclosure, dispatch, 'on');
 	}
 
-	// import { utilGetDimensions } from '../util/dimensions';
+	// Can be labeled and collapsible.
 
+	function uiSection(id, context) {
+	  var _classes = utilFunctor('');
 
-	function uiMapInMap(context) {
+	  var _shouldDisplay;
 
-	    function mapInMap(selection) {
-	        var backgroundLayer = rendererTileLayer(context);
-	        var overlayLayers = {};
-	        var projection = geoRawMercator();
-	        var dataLayer = svgData(projection, context).showLabels(false);
-	        var debugLayer = svgDebug(projection, context);
-	        var zoom = d3_zoom()
-	            .scaleExtent([geoZoomToScale(0.5), geoZoomToScale(24)])
-	            .on('start', zoomStarted)
-	            .on('zoom', zoomed)
-	            .on('end', zoomEnded);
-
-	        var wrap = select(null);
-	        var tiles = select(null);
-	        var viewport = select(null);
-
-	        var _isTransformed = false;
-	        var _isHidden = true;
-	        var _skipEvents = false;
-	        var _gesture = null;
-	        var _zDiff = 6;    // by default, minimap renders at (main zoom - 6)
-	        var _dMini;        // dimensions of minimap
-	        var _cMini;        // center pixel of minimap
-	        var _tStart;       // transform at start of gesture
-	        var _tCurr;        // transform at most recent event
-	        var _timeoutID;
-
-
-	        function zoomStarted() {
-	            if (_skipEvents) { return; }
-	            _tStart = _tCurr = projection.transform();
-	            _gesture = null;
-	        }
-
-
-	        function zoomed() {
-	            if (_skipEvents) { return; }
-
-	            var x = event.transform.x;
-	            var y = event.transform.y;
-	            var k = event.transform.k;
-	            var isZooming = (k !== _tStart.k);
-	            var isPanning = (x !== _tStart.x || y !== _tStart.y);
-
-	            if (!isZooming && !isPanning) {
-	                return;  // no change
-	            }
+	  var _content;
 
-	            // lock in either zooming or panning, don't allow both in minimap.
-	            if (!_gesture) {
-	                _gesture = isZooming ? 'zoom' : 'pan';
-	            }
+	  var _disclosure;
 
-	            var tMini = projection.transform();
-	            var tX, tY, scale;
+	  var _label;
 
-	            if (_gesture === 'zoom') {
-	                scale = k / tMini.k;
-	                tX = (_cMini[0] / scale - _cMini[0]) * scale;
-	                tY = (_cMini[1] / scale - _cMini[1]) * scale;
-	            } else {
-	                k = tMini.k;
-	                scale = 1;
-	                tX = x - tMini.x;
-	                tY = y - tMini.y;
-	            }
+	  var _expandedByDefault = utilFunctor(true);
 
-	            utilSetTransform(tiles, tX, tY, scale);
-	            utilSetTransform(viewport, 0, 0, scale);
-	            _isTransformed = true;
-	            _tCurr = identity$2.translate(x, y).scale(k);
+	  var _disclosureContent;
 
-	            var zMain = geoScaleToZoom(context.projection.scale());
-	            var zMini = geoScaleToZoom(k);
+	  var _disclosureExpanded;
 
-	            _zDiff = zMain - zMini;
+	  var _containerSelection = select(null);
 
-	            queueRedraw();
-	        }
+	  var section = {
+	    id: id
+	  };
 
+	  section.classes = function (val) {
+	    if (!arguments.length) return _classes;
+	    _classes = utilFunctor(val);
+	    return section;
+	  };
 
-	        function zoomEnded() {
-	            if (_skipEvents) { return; }
-	            if (_gesture !== 'pan') { return; }
+	  section.label = function (val) {
+	    if (!arguments.length) return _label;
+	    _label = utilFunctor(val);
+	    return section;
+	  };
 
-	            updateProjection();
-	            _gesture = null;
-	            context.map().center(projection.invert(_cMini));   // recenter main map..
-	        }
+	  section.expandedByDefault = function (val) {
+	    if (!arguments.length) return _expandedByDefault;
+	    _expandedByDefault = utilFunctor(val);
+	    return section;
+	  };
+
+	  section.shouldDisplay = function (val) {
+	    if (!arguments.length) return _shouldDisplay;
+	    _shouldDisplay = utilFunctor(val);
+	    return section;
+	  };
 
+	  section.content = function (val) {
+	    if (!arguments.length) return _content;
+	    _content = val;
+	    return section;
+	  };
 
-	        function updateProjection() {
-	            var loc = context.map().center();
-	            var tMain = context.projection.transform();
-	            var zMain = geoScaleToZoom(tMain.k);
-	            var zMini = Math.max(zMain - _zDiff, 0.5);
-	            var kMini = geoZoomToScale(zMini);
+	  section.disclosureContent = function (val) {
+	    if (!arguments.length) return _disclosureContent;
+	    _disclosureContent = val;
+	    return section;
+	  };
 
-	            projection
-	                .translate([tMain.x, tMain.y])
-	                .scale(kMini);
+	  section.disclosureExpanded = function (val) {
+	    if (!arguments.length) return _disclosureExpanded;
+	    _disclosureExpanded = val;
+	    return section;
+	  }; // may be called multiple times
 
-	            var point = projection(loc);
-	            var mouse = (_gesture === 'pan') ? geoVecSubtract([_tCurr.x, _tCurr.y], [_tStart.x, _tStart.y]) : [0, 0];
-	            var xMini = _cMini[0] - point[0] + tMain.x + mouse[0];
-	            var yMini = _cMini[1] - point[1] + tMain.y + mouse[1];
 
-	            projection
-	                .translate([xMini, yMini])
-	                .clipExtent([[0, 0], _dMini]);
+	  section.render = function (selection) {
+	    _containerSelection = selection.selectAll('.section-' + id).data([0]);
 
-	            _tCurr = projection.transform();
+	    var sectionEnter = _containerSelection.enter().append('div').attr('class', 'section section-' + id + ' ' + (_classes && _classes() || ''));
 
-	            if (_isTransformed) {
-	                utilSetTransform(tiles, 0, 0);
-	                utilSetTransform(viewport, 0, 0);
-	                _isTransformed = false;
-	            }
+	    _containerSelection = sectionEnter.merge(_containerSelection);
 
-	            zoom
-	                .scaleExtent([geoZoomToScale(0.5), geoZoomToScale(zMain - 3)]);
+	    _containerSelection.call(renderContent);
+	  };
 
-	            _skipEvents = true;
-	            wrap.call(zoom.transform, _tCurr);
-	            _skipEvents = false;
-	        }
+	  section.reRender = function () {
+	    _containerSelection.call(renderContent);
+	  };
 
+	  section.selection = function () {
+	    return _containerSelection;
+	  };
 
-	        function redraw() {
-	            clearTimeout(_timeoutID);
-	            if (_isHidden) { return; }
+	  section.disclosure = function () {
+	    return _disclosure;
+	  }; // may be called multiple times
 
-	            updateProjection();
-	            var zMini = geoScaleToZoom(projection.scale());
 
-	            // setup tile container
-	            tiles = wrap
-	                .selectAll('.map-in-map-tiles')
-	                .data([0]);
+	  function renderContent(selection) {
+	    if (_shouldDisplay) {
+	      var shouldDisplay = _shouldDisplay();
 
-	            tiles = tiles.enter()
-	                .append('div')
-	                .attr('class', 'map-in-map-tiles')
-	                .merge(tiles);
+	      selection.classed('hide', !shouldDisplay);
 
-	            // redraw background
-	            backgroundLayer
-	                .source(context.background().baseLayerSource())
-	                .projection(projection)
-	                .dimensions(_dMini);
+	      if (!shouldDisplay) {
+	        selection.html('');
+	        return;
+	      }
+	    }
 
-	            var background = tiles
-	                .selectAll('.map-in-map-background')
-	                .data([0]);
+	    if (_disclosureContent) {
+	      if (!_disclosure) {
+	        _disclosure = uiDisclosure(context, id.replace(/-/g, '_'), _expandedByDefault()).label(_label || '')
+	        /*.on('toggled', function(expanded) {
+	            if (expanded) { selection.node().parentNode.scrollTop += 200; }
+	        })*/
+	        .content(_disclosureContent);
+	      }
 
-	            background.enter()
-	                .append('div')
-	                .attr('class', 'map-in-map-background')
-	                .merge(background)
-	                .call(backgroundLayer);
+	      if (_disclosureExpanded !== undefined) {
+	        _disclosure.expanded(_disclosureExpanded);
 
+	        _disclosureExpanded = undefined;
+	      }
 
-	            // redraw overlay
-	            var overlaySources = context.background().overlayLayerSources();
-	            var activeOverlayLayers = [];
-	            for (var i = 0; i < overlaySources.length; i++) {
-	                if (overlaySources[i].validZoom(zMini)) {
-	                    if (!overlayLayers[i]) { overlayLayers[i] = rendererTileLayer(context); }
-	                    activeOverlayLayers.push(overlayLayers[i]
-	                        .source(overlaySources[i])
-	                        .projection(projection)
-	                        .dimensions(_dMini));
-	                }
-	            }
+	      selection.call(_disclosure);
+	      return;
+	    }
 
-	            var overlay = tiles
-	                .selectAll('.map-in-map-overlay')
-	                .data([0]);
+	    if (_content) {
+	      selection.call(_content);
+	    }
+	  }
 
-	            overlay = overlay.enter()
-	                .append('div')
-	                .attr('class', 'map-in-map-overlay')
-	                .merge(overlay);
+	  return section;
+	}
 
+	// {
+	//   key: 'string',     // required
+	//   value: 'string'    // optional
+	// }
+	//   -or-
+	// {
+	//   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
+	// }
+	//
 
-	            var overlays = overlay
-	                .selectAll('div')
-	                .data(activeOverlayLayers, function(d) { return d.source().name(); });
+	function uiTagReference(what) {
+	  var wikibase = what.qid ? services.wikidata : services.osmWikibase;
+	  var tagReference = {};
 
-	            overlays.exit()
-	                .remove();
+	  var _button = select(null);
 
-	            overlays = overlays.enter()
-	                .append('div')
-	                .merge(overlays)
-	                .each(function(layer) { select(this).call(layer); });
+	  var _body = select(null);
 
+	  var _loaded;
 
-	            var dataLayers = tiles
-	                .selectAll('.map-in-map-data')
-	                .data([0]);
+	  var _showing;
 
-	            dataLayers.exit()
-	                .remove();
+	  function load() {
+	    if (!wikibase) return;
 
-	            dataLayers = dataLayers.enter()
-	                .append('svg')
-	                .attr('class', 'map-in-map-data')
-	                .merge(dataLayers)
-	                .call(dataLayer)
-	                .call(debugLayer);
+	    _button.classed('tag-reference-loading', true);
 
+	    wikibase.getDocs(what, gotDocs);
+	  }
 
-	            // redraw viewport bounding box
-	            if (_gesture !== 'pan') {
-	                var getPath = d3_geoPath(projection);
-	                var bbox = { type: 'Polygon', coordinates: [context.map().extent().polygon()] };
+	  function gotDocs(err, docs) {
+	    _body.html('');
 
-	                viewport = wrap.selectAll('.map-in-map-viewport')
-	                    .data([0]);
+	    if (!docs || !docs.title) {
+	      _body.append('p').attr('class', 'tag-reference-description').html(_t.html('inspector.no_documentation_key'));
 
-	                viewport = viewport.enter()
-	                    .append('svg')
-	                    .attr('class', 'map-in-map-viewport')
-	                    .merge(viewport);
+	      done();
+	      return;
+	    }
 
+	    if (docs.imageURL) {
+	      _body.append('img').attr('class', 'tag-reference-wiki-image').attr('src', docs.imageURL).on('load', function () {
+	        done();
+	      }).on('error', function () {
+	        select(this).remove();
+	        done();
+	      });
+	    } else {
+	      done();
+	    }
 
-	                var path = viewport.selectAll('.map-in-map-bbox')
-	                    .data([bbox]);
+	    _body.append('p').attr('class', 'tag-reference-description').html(docs.description ? _mainLocalizer.htmlForLocalizedText(docs.description, docs.descriptionLocaleCode) : _t.html('inspector.no_documentation_key')).append('a').attr('class', 'tag-reference-edit').attr('target', '_blank').attr('title', _t('inspector.edit_reference')).attr('href', docs.editURL).call(svgIcon('#iD-icon-edit', 'inline'));
 
-	                path.enter()
-	                    .append('path')
-	                    .attr('class', 'map-in-map-bbox')
-	                    .merge(path)
-	                    .attr('d', getPath)
-	                    .classed('thick', function(d) { return getPath.area(d) < 30; });
-	            }
-	        }
+	    if (docs.wiki) {
+	      _body.append('a').attr('class', 'tag-reference-link').attr('target', '_blank').attr('href', docs.wiki.url).call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html(docs.wiki.text));
+	    } // Add link to info about "good changeset comments" - #2923
 
 
-	        function queueRedraw() {
-	            clearTimeout(_timeoutID);
-	            _timeoutID = setTimeout(function() { redraw(); }, 750);
-	        }
+	    if (what.key === 'comment') {
+	      _body.append('a').attr('class', 'tag-reference-comment-link').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', _t('commit.about_changeset_comments_link')).append('span').html(_t.html('commit.about_changeset_comments'));
+	    }
+	  }
 
+	  function done() {
+	    _loaded = true;
 
-	        function toggle() {
-	            if (event) { event.preventDefault(); }
+	    _button.classed('tag-reference-loading', false);
 
-	            _isHidden = !_isHidden;
+	    _body.classed('expanded', true).transition().duration(200).style('max-height', '200px').style('opacity', '1');
 
-	            context.container().select('.minimap-toggle-item')
-	                .classed('active', !_isHidden)
-	                .select('input')
-	                .property('checked', !_isHidden);
+	    _showing = true;
 
-	            if (_isHidden) {
-	                wrap
-	                    .style('display', 'block')
-	                    .style('opacity', '1')
-	                    .transition()
-	                    .duration(200)
-	                    .style('opacity', '0')
-	                    .on('end', function() {
-	                        selection.selectAll('.map-in-map')
-	                            .style('display', 'none');
-	                    });
-	            } else {
-	                wrap
-	                    .style('display', 'block')
-	                    .style('opacity', '0')
-	                    .transition()
-	                    .duration(200)
-	                    .style('opacity', '1')
-	                    .on('end', function() {
-	                        redraw();
-	                    });
-	            }
-	        }
+	    _button.selectAll('svg.icon use').each(function () {
+	      var iconUse = select(this);
 
+	      if (iconUse.attr('href') === '#iD-icon-info') {
+	        iconUse.attr('href', '#iD-icon-info-filled');
+	      }
+	    });
+	  }
 
-	        uiMapInMap.toggle = toggle;
+	  function hide() {
+	    _body.transition().duration(200).style('max-height', '0px').style('opacity', '0').on('end', function () {
+	      _body.classed('expanded', false);
+	    });
 
-	        wrap = selection.selectAll('.map-in-map')
-	            .data([0]);
+	    _showing = false;
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'map-in-map')
-	            .style('display', (_isHidden ? 'none' : 'block'))
-	            .call(zoom)
-	            .on('dblclick.zoom', null)
-	            .merge(wrap);
-
-	        // reflow warning: Hardcode dimensions - currently can't resize it anyway..
-	        _dMini = [200,150]; //utilGetDimensions(wrap);
-	        _cMini = geoVecScale(_dMini, 0.5);
-
-	        context.map()
-	            .on('drawn.map-in-map', function(drawn) {
-	                if (drawn.full === true) {
-	                    redraw();
-	                }
-	            });
+	    _button.selectAll('svg.icon use').each(function () {
+	      var iconUse = select(this);
 
-	        redraw();
+	      if (iconUse.attr('href') === '#iD-icon-info-filled') {
+	        iconUse.attr('href', '#iD-icon-info');
+	      }
+	    });
+	  }
 
-	        context.keybinding()
-	            .on(_t('background.minimap.key'), toggle);
-	    }
+	  tagReference.button = function (selection, klass, iconName) {
+	    _button = selection.selectAll('.tag-reference-button').data([0]);
+	    _button = _button.enter().append('button').attr('class', 'tag-reference-button ' + (klass || '')).attr('title', _t('icons.information')).call(svgIcon('#iD-icon-' + (iconName || 'inspect'))).merge(_button);
 
-	    return mapInMap;
-	}
+	    _button.on('click', function (d3_event) {
+	      d3_event.stopPropagation();
+	      d3_event.preventDefault();
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	function uiNotice(context) {
+	      if (_showing) {
+	        hide();
+	      } else if (_loaded) {
+	        done();
+	      } else {
+	        load();
+	      }
+	    });
+	  };
 
-	    return function(selection) {
-	        var div = selection
-	            .append('div')
-	            .attr('class', 'notice');
-
-	        var button = div
-	            .append('button')
-	            .attr('class', 'zoom-to notice fillD')
-	            .on('click', function() {
-	                context.map().zoomEase(context.minEditableZoom());
-	            })
-	            .on('wheel', function() {   // let wheel events pass through #4482
-	                var e2 = new WheelEvent(event.type, event);
-	                context.surface().node().dispatchEvent(e2);
-	            });
+	  tagReference.body = function (selection) {
+	    var itemID = what.qid || what.key + '-' + (what.value || '');
+	    _body = selection.selectAll('.tag-reference-body').data([itemID], function (d) {
+	      return d;
+	    });
 
-	        button
-	            .call(svgIcon('#iD-icon-plus', 'pre-text'))
-	            .append('span')
-	            .attr('class', 'label')
-	            .text(_t('zoom_in_edit'));
+	    _body.exit().remove();
 
+	    _body = _body.enter().append('div').attr('class', 'tag-reference-body').style('max-height', '0').style('opacity', '0').merge(_body);
 
-	        function disableTooHigh() {
-	            var canEdit = context.map().zoom() >= context.minEditableZoom();
-	            div.style('display', canEdit ? 'none' : 'block');
-	        }
+	    if (_showing === false) {
+	      hide();
+	    }
+	  };
 
-	        context.map()
-	            .on('move.notice', debounce(disableTooHigh, 500));
+	  tagReference.showing = function (val) {
+	    if (!arguments.length) return _showing;
+	    _showing = val;
+	    return tagReference;
+	  };
 
-	        disableTooHigh();
-	    };
+	  return tagReference;
 	}
 
-	function uiPhotoviewer(context) {
+	function uiSectionRawTagEditor(id, context) {
+	  var section = uiSection(id, context).classes('raw-tag-editor').label(function () {
+	    var count = Object.keys(_tags).filter(function (d) {
+	      return d;
+	    }).length;
+	    return _t('inspector.title_count', {
+	      title: _t.html('inspector.tags'),
+	      count: count
+	    });
+	  }).expandedByDefault(false).disclosureContent(renderDisclosureContent);
+	  var taginfo = services.taginfo;
+	  var dispatch = dispatch$8('change');
+	  var availableViews = [{
+	    id: 'list',
+	    icon: '#fas-th-list'
+	  }, {
+	    id: 'text',
+	    icon: '#fas-i-cursor'
+	  }];
 
-	    var dispatch$1 = dispatch('resize');
+	  var _tagView = corePreferences('raw-tag-editor-view') || 'list'; // 'list, 'text'
 
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	    function photoviewer(selection) {
-	        selection
-	            .append('button')
-	            .attr('class', 'thumb-hide')
-	            .on('click', function () {
-	                if (services.streetside) { services.streetside.hideViewer(context); }
-	                if (services.mapillary) { services.mapillary.hideViewer(context); }
-	                if (services.openstreetcam) { services.openstreetcam.hideViewer(context); }
-	            })
-	            .append('div')
-	            .call(svgIcon('#iD-icon-close'));
-
-	        function preventDefault() {
-	            event.preventDefault();
-	        }
-
-	        selection
-	            .append('button')
-	            .attr('class', 'resize-handle-xy')
-	            .on('touchstart touchdown touchend', preventDefault)
-	            .on(
-	                _pointerPrefix + 'down',
-	                buildResizeListener(selection, 'resize', dispatch$1, { resizeOnX: true, resizeOnY: true })
-	            );
-
-	        selection
-	            .append('button')
-	            .attr('class', 'resize-handle-x')
-	            .on('touchstart touchdown touchend', preventDefault)
-	            .on(
-	                _pointerPrefix + 'down',
-	                buildResizeListener(selection, 'resize', dispatch$1, { resizeOnX: true })
-	            );
-
-	        selection
-	            .append('button')
-	            .attr('class', 'resize-handle-y')
-	            .on('touchstart touchdown touchend', preventDefault)
-	            .on(
-	                _pointerPrefix + 'down',
-	                buildResizeListener(selection, 'resize', dispatch$1, { resizeOnY: true })
-	            );
-
-	        services.streetside.loadViewer(context);
-	        services.mapillary.loadViewer(context);
-	        services.openstreetcam.loadViewer(context);
-
-	        function buildResizeListener(target, eventName, dispatch, options) {
-
-	            var resizeOnX = !!options.resizeOnX;
-	            var resizeOnY = !!options.resizeOnY;
-	            var minHeight = options.minHeight || 240;
-	            var minWidth = options.minWidth || 320;
-	            var pointerId;
-	            var startX;
-	            var startY;
-	            var startWidth;
-	            var startHeight;
-
-	            function startResize() {
-	                if (pointerId !== (event.pointerId || 'mouse')) { return; }
-
-	                event.preventDefault();
-	                event.stopPropagation();
-
-	                var mapSize = context.map().dimensions();
-
-	                if (resizeOnX) {
-	                    var maxWidth = mapSize[0];
-	                    var newWidth = clamp((startWidth + event.clientX - startX), minWidth, maxWidth);
-	                    target.style('width', newWidth + 'px');
-	                }
+	  var _readOnlyTags = []; // the keys in the order we want them to display
 
-	                if (resizeOnY) {
-	                    var maxHeight = mapSize[1] - 90;  // preserve space at top/bottom of map
-	                    var newHeight = clamp((startHeight + startY - event.clientY), minHeight, maxHeight);
-	                    target.style('height', newHeight + 'px');
-	                }
+	  var _orderedKeys = [];
+	  var _showBlank = false;
+	  var _pendingChange = null;
 
-	                dispatch.call(eventName, target, utilGetDimensions(target, true));
-	            }
+	  var _state;
 
-	            function clamp(num, min, max) {
-	                return Math.max(min, Math.min(num, max));
-	            }
+	  var _presets;
 
-	            function stopResize() {
-	                if (pointerId !== (event.pointerId || 'mouse')) { return; }
+	  var _tags;
 
-	                event.preventDefault();
-	                event.stopPropagation();
+	  var _entityIDs;
 
-	                // remove all the listeners we added
-	                select(window)
-	                    .on('.' + eventName, null);
-	            }
+	  var _didInteract = false;
 
-	            return function initResize() {
-	                event.preventDefault();
-	                event.stopPropagation();
+	  function interacted() {
+	    _didInteract = true;
+	  }
 
-	                pointerId = event.pointerId || 'mouse';
+	  function renderDisclosureContent(wrap) {
+	    // remove deleted keys
+	    _orderedKeys = _orderedKeys.filter(function (key) {
+	      return _tags[key] !== undefined;
+	    }); // When switching to a different entity or changing the state (hover/select)
+	    // reorder the keys alphabetically.
+	    // We trigger this by emptying the `_orderedKeys` array, then it will be rebuilt here.
+	    // Otherwise leave their order alone - #5857, #5927
 
-	                startX = event.clientX;
-	                startY = event.clientY;
-	                var targetRect = target.node().getBoundingClientRect();
-	                startWidth = targetRect.width;
-	                startHeight = targetRect.height;
+	    var all = Object.keys(_tags).sort();
+	    var missingKeys = utilArrayDifference(all, _orderedKeys);
 
-	                select(window)
-	                    .on(_pointerPrefix + 'move.' + eventName, startResize, false)
-	                    .on(_pointerPrefix + 'up.' + eventName, stopResize, false);
+	    for (var i in missingKeys) {
+	      _orderedKeys.push(missingKeys[i]);
+	    } // assemble row data
 
-	                if (_pointerPrefix === 'pointer') {
-	                    select(window)
-	                        .on('pointercancel.' + eventName, stopResize, false);
-	                }
-	            };
-	        }
-	    }
 
-	    photoviewer.onMapResize = function() {
-	        var photoviewer = context.container().select('.photoviewer');
-	        var content = context.container().select('.main-content');
-	        var mapDimensions = utilGetDimensions(content, true);
-	        // shrink photo viewer if it is too big
-	        // (-90 preserves space at top and bottom of map used by menus)
-	        var photoDimensions = utilGetDimensions(photoviewer, true);
-	        if (photoDimensions[0] > mapDimensions[0] || photoDimensions[1] > (mapDimensions[1] - 90)) {
-	            var setPhotoDimensions = [
-	                Math.min(photoDimensions[0], mapDimensions[0]),
-	                Math.min(photoDimensions[1], mapDimensions[1] - 90) ];
+	    var rowData = _orderedKeys.map(function (key, i) {
+	      return {
+	        index: i,
+	        key: key,
+	        value: _tags[key]
+	      };
+	    }); // append blank row last, if necessary
 
-	            photoviewer
-	                .style('width', setPhotoDimensions[0] + 'px')
-	                .style('height', setPhotoDimensions[1] + 'px');
 
-	            dispatch$1.call('resize', photoviewer, setPhotoDimensions);
-	        }
-	    };
+	    if (!rowData.length || _showBlank) {
+	      _showBlank = false;
+	      rowData.push({
+	        index: rowData.length,
+	        key: '',
+	        value: ''
+	      });
+	    } // View Options
+
+
+	    var options = wrap.selectAll('.raw-tag-options').data([0]);
+	    options.exit().remove();
+	    var optionsEnter = options.enter().insert('div', ':first-child').attr('class', 'raw-tag-options');
+	    var optionEnter = optionsEnter.selectAll('.raw-tag-option').data(availableViews, function (d) {
+	      return d.id;
+	    }).enter();
+	    optionEnter.append('button').attr('class', function (d) {
+	      return 'raw-tag-option raw-tag-option-' + d.id + (_tagView === d.id ? ' selected' : '');
+	    }).attr('title', function (d) {
+	      return _t('icons.' + d.id);
+	    }).on('click', function (d3_event, d) {
+	      _tagView = d.id;
+	      corePreferences('raw-tag-editor-view', d.id);
+	      wrap.selectAll('.raw-tag-option').classed('selected', function (datum) {
+	        return datum === d;
+	      });
+	      wrap.selectAll('.tag-text').classed('hide', d.id !== 'text').each(setTextareaHeight);
+	      wrap.selectAll('.tag-list, .add-row').classed('hide', d.id !== 'list');
+	    }).each(function (d) {
+	      select(this).call(svgIcon(d.icon));
+	    }); // View as Text
 
-	    return utilRebind(photoviewer, dispatch$1, 'on');
-	}
+	    var textData = rowsToText(rowData);
+	    var textarea = wrap.selectAll('.tag-text').data([0]);
+	    textarea = textarea.enter().append('textarea').attr('class', 'tag-text' + (_tagView !== 'text' ? ' hide' : '')).call(utilNoAuto).attr('placeholder', _t('inspector.key_value')).attr('spellcheck', 'false').merge(textarea);
+	    textarea.call(utilGetSetValue, textData).each(setTextareaHeight).on('input', setTextareaHeight).on('focus', interacted).on('blur', textChanged).on('change', textChanged); // View as List
 
-	function uiRestore(context) {
-	  return function(selection) {
-	    if (!context.history().hasRestorableChanges()) { return; }
+	    var list = wrap.selectAll('.tag-list').data([0]);
+	    list = list.enter().append('ul').attr('class', 'tag-list' + (_tagView !== 'list' ? ' hide' : '')).merge(list); // Container for the Add button
 
-	    var modalSelection = uiModal(selection, true);
+	    var addRowEnter = wrap.selectAll('.add-row').data([0]).enter().append('div').attr('class', 'add-row' + (_tagView !== 'list' ? ' hide' : ''));
+	    addRowEnter.append('button').attr('class', 'add-tag').call(svgIcon('#iD-icon-plus', 'light')).on('click', addTag);
+	    addRowEnter.append('div').attr('class', 'space-value'); // preserve space
 
-	    modalSelection.select('.modal')
-	      .attr('class', 'modal fillL');
+	    addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
+	    // Tag list items
 
-	    var introModal = modalSelection.select('.content');
+	    var items = list.selectAll('.tag-row').data(rowData, function (d) {
+	      return d.key;
+	    });
+	    items.exit().each(unbind).remove(); // Enter
 
-	    introModal
-	      .append('div')
-	      .attr('class', 'modal-section')
-	      .append('h3')
-	      .text(_t('restore.heading'));
-
-	    introModal
-	      .append('div')
-	      .attr('class','modal-section')
-	      .append('p')
-	      .text(_t('restore.description'));
-
-	    var buttonWrap = introModal
-	      .append('div')
-	      .attr('class', 'modal-actions');
-
-	    var restore = buttonWrap
-	      .append('button')
-	      .attr('class', 'restore')
-	      .on('click', function () {
-	        context.history().restore();
-	        modalSelection.remove();
-	      });
-
-	    restore
-	      .append('svg')
-	      .attr('class', 'logo logo-restore')
-	      .append('use')
-	      .attr('xlink:href', '#iD-logo-restore');
-
-	    restore
-	      .append('div')
-	      .text(_t('restore.restore'));
-
-	    var reset = buttonWrap
-	      .append('button')
-	      .attr('class', 'reset')
-	      .on('click', function () {
-	        context.history().clearSaved();
-	        modalSelection.remove();
-	      });
-
-	    reset
-	      .append('svg')
-	      .attr('class', 'logo logo-reset')
-	      .append('use')
-	      .attr('xlink:href', '#iD-logo-reset');
-
-	    reset
-	      .append('div')
-	      .text(_t('restore.reset'));
+	    var itemsEnter = items.enter().append('li').attr('class', 'tag-row').classed('readonly', isReadOnly);
+	    var innerWrap = itemsEnter.append('div').attr('class', 'inner-wrap');
+	    innerWrap.append('div').attr('class', 'key-wrap').append('input').property('type', 'text').attr('class', 'key').call(utilNoAuto).on('focus', interacted).on('blur', keyChange).on('change', keyChange);
+	    innerWrap.append('div').attr('class', 'value-wrap').append('input').property('type', 'text').attr('class', 'value').call(utilNoAuto).on('focus', interacted).on('blur', valueChange).on('change', valueChange).on('keydown.push-more', pushMore);
+	    innerWrap.append('button').attr('class', 'form-field-button remove').attr('title', _t('icons.remove')).call(svgIcon('#iD-operation-delete')); // Update
 
-	    restore.node().focus();
-	  };
-	}
+	    items = items.merge(itemsEnter).sort(function (a, b) {
+	      return a.index - b.index;
+	    });
+	    items.each(function (d) {
+	      var row = select(this);
+	      var key = row.select('input.key'); // propagate bound data
 
-	function uiScale(context) {
-	    var projection = context.projection,
-	        isImperial = !_mainLocalizer.usesMetric(),
-	        maxLength = 180,
-	        tickHeight = 8;
+	      var value = row.select('input.value'); // propagate bound data
 
+	      if (_entityIDs && taginfo && _state !== 'hover') {
+	        bindTypeahead(key, value);
+	      }
 
-	    function scaleDefs(loc1, loc2) {
-	        var lat = (loc2[1] + loc1[1]) / 2,
-	            conversion = (isImperial ? 3.28084 : 1),
-	            dist = geoLonToMeters(loc2[0] - loc1[0], lat) * conversion,
-	            scale = { dist: 0, px: 0, text: '' },
-	            buckets, i, val, dLon;
+	      var referenceOptions = {
+	        key: d.key
+	      };
 
-	        if (isImperial) {
-	            buckets = [5280000, 528000, 52800, 5280, 500, 50, 5, 1];
-	        } else {
-	            buckets = [5000000, 500000, 50000, 5000, 500, 50, 5, 1];
-	        }
+	      if (typeof d.value === 'string') {
+	        referenceOptions.value = d.value;
+	      }
 
-	        // determine a user-friendly endpoint for the scale
-	        for (i = 0; i < buckets.length; i++) {
-	            val = buckets[i];
-	            if (dist >= val) {
-	                scale.dist = Math.floor(dist / val) * val;
-	                break;
-	            } else {
-	                scale.dist = +dist.toFixed(2);
-	            }
-	        }
+	      var reference = uiTagReference(referenceOptions);
 
-	        dLon = geoMetersToLon(scale.dist / conversion, lat);
-	        scale.px = Math.round(projection([loc1[0] + dLon, loc1[1]])[0]);
+	      if (_state === 'hover') {
+	        reference.showing(false);
+	      }
 
-	        scale.text = displayLength(scale.dist / conversion, isImperial);
+	      row.select('.inner-wrap') // propagate bound data
+	      .call(reference.button);
+	      row.call(reference.body);
+	      row.select('button.remove'); // propagate bound data
+	    });
+	    items.selectAll('input.key').attr('title', function (d) {
+	      return d.key;
+	    }).call(utilGetSetValue, function (d) {
+	      return d.key;
+	    }).attr('readonly', function (d) {
+	      return isReadOnly(d) || typeof d.value !== 'string' || null;
+	    });
+	    items.selectAll('input.value').attr('title', function (d) {
+	      return Array.isArray(d.value) ? d.value.filter(Boolean).join('\n') : d.value;
+	    }).classed('mixed', function (d) {
+	      return Array.isArray(d.value);
+	    }).attr('placeholder', function (d) {
+	      return typeof d.value === 'string' ? null : _t('inspector.multiple_values');
+	    }).call(utilGetSetValue, function (d) {
+	      return typeof d.value === 'string' ? d.value : '';
+	    }).attr('readonly', function (d) {
+	      return isReadOnly(d) || null;
+	    });
+	    items.selectAll('button.remove').on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'down', removeTag); // 'click' fires too late - #5878
+	  }
 
-	        return scale;
+	  function isReadOnly(d) {
+	    for (var i = 0; i < _readOnlyTags.length; i++) {
+	      if (d.key.match(_readOnlyTags[i]) !== null) {
+	        return true;
+	      }
 	    }
 
+	    return false;
+	  }
 
-	    function update(selection) {
-	        // choose loc1, loc2 along bottom of viewport (near where the scale will be drawn)
-	        var dims = context.map().dimensions(),
-	            loc1 = projection.invert([0, dims[1]]),
-	            loc2 = projection.invert([maxLength, dims[1]]),
-	            scale = scaleDefs(loc1, loc2);
+	  function setTextareaHeight() {
+	    if (_tagView !== 'text') return;
+	    var selection = select(this);
+	    var matches = selection.node().value.match(/\n/g);
+	    var lineCount = 2 + Number(matches && matches.length);
+	    var lineHeight = 20;
+	    selection.style('height', lineCount * lineHeight + 'px');
+	  }
 
-	        selection.select('.scale-path')
-	            .attr('d', 'M0.5,0.5v' + tickHeight + 'h' + scale.px + 'v-' + tickHeight);
+	  function stringify(s) {
+	    return JSON.stringify(s).slice(1, -1); // without leading/trailing "
+	  }
 
-	        selection.select('.scale-textgroup')
-	            .attr('transform', 'translate(' + (scale.px + 8) + ',' + tickHeight + ')');
+	  function unstringify(s) {
+	    var leading = '';
+	    var trailing = '';
 
-	        selection.select('.scale-text')
-	            .text(scale.text);
+	    if (s.length < 1 || s.charAt(0) !== '"') {
+	      leading = '"';
 	    }
 
+	    if (s.length < 2 || s.charAt(s.length - 1) !== '"' || s.charAt(s.length - 1) === '"' && s.charAt(s.length - 2) === '\\') {
+	      trailing = '"';
+	    }
 
-	    return function(selection) {
-	        function switchUnits() {
-	            isImperial = !isImperial;
-	            selection.call(update);
-	        }
+	    return JSON.parse(leading + s + trailing);
+	  }
 
-	        var scalegroup = selection.append('svg')
-	            .attr('class', 'scale')
-	            .on('click', switchUnits)
-	            .append('g')
-	            .attr('transform', 'translate(10,11)');
+	  function rowsToText(rows) {
+	    var str = rows.filter(function (row) {
+	      return row.key && row.key.trim() !== '';
+	    }).map(function (row) {
+	      var rawVal = row.value;
+	      if (typeof rawVal !== 'string') rawVal = '*';
+	      var val = rawVal ? stringify(rawVal) : '';
+	      return stringify(row.key) + '=' + val;
+	    }).join('\n');
 
-	        scalegroup
-	            .append('path')
-	            .attr('class', 'scale-path');
+	    if (_state !== 'hover' && str.length) {
+	      return str + '\n';
+	    }
 
-	        scalegroup
-	            .append('g')
-	            .attr('class', 'scale-textgroup')
-	            .append('text')
-	            .attr('class', 'scale-text');
+	    return str;
+	  }
 
-	        selection.call(update);
+	  function textChanged() {
+	    var newText = this.value.trim();
+	    var newTags = {};
+	    newText.split('\n').forEach(function (row) {
+	      var m = row.match(/^\s*([^=]+)=(.*)$/);
 
-	        context.map().on('move.scale', function() {
-	            update(selection);
-	        });
-	    };
-	}
+	      if (m !== null) {
+	        var k = context.cleanTagKey(unstringify(m[1].trim()));
+	        var v = context.cleanTagValue(unstringify(m[2].trim()));
+	        newTags[k] = v;
+	      }
+	    });
+	    var tagDiff = utilTagDiff(_tags, newTags);
+	    if (!tagDiff.length) return;
+	    _pendingChange = _pendingChange || {};
+	    tagDiff.forEach(function (change) {
+	      if (isReadOnly({
+	        key: change.key
+	      })) return; // skip unchanged multiselection placeholders
+
+	      if (change.newVal === '*' && typeof change.oldVal !== 'string') return;
+
+	      if (change.type === '-') {
+	        _pendingChange[change.key] = undefined;
+	      } else if (change.type === '+') {
+	        _pendingChange[change.key] = change.newVal || '';
+	      }
+	    });
 
-	function uiShortcuts(context) {
-	    var detected = utilDetect();
-	    var _activeTab = 0;
-	    var _modalSelection;
-	    var _selection = select(null);
+	    if (Object.keys(_pendingChange).length === 0) {
+	      _pendingChange = null;
+	      return;
+	    }
+
+	    scheduleChange();
+	  }
 
+	  function pushMore(d3_event) {
+	    // if pressing Tab on the last value field with content, add a blank row
+	    if (d3_event.keyCode === 9 && !d3_event.shiftKey && section.selection().selectAll('.tag-list li:last-child input.value').node() === this && utilGetSetValue(select(this))) {
+	      addTag();
+	    }
+	  }
 
-	    context.keybinding()
-	        .on([_t('shortcuts.toggle.key'), '?'], function () {
-	            if (context.container().selectAll('.modal-shortcuts').size()) {  // already showing
-	                if (_modalSelection) {
-	                    _modalSelection.close();
-	                    _modalSelection = null;
-	                }
-	            } else {
-	                _modalSelection = uiModal(_selection);
-	                _modalSelection.call(shortcutsModal);
-	            }
+	  function bindTypeahead(key, value) {
+	    if (isReadOnly(key.datum())) return;
+
+	    if (Array.isArray(value.datum().value)) {
+	      value.call(uiCombobox(context, 'tag-value').minItems(1).fetcher(function (value, callback) {
+	        var keyString = utilGetSetValue(key);
+	        if (!_tags[keyString]) return;
+
+	        var data = _tags[keyString].filter(Boolean).map(function (tagValue) {
+	          return {
+	            value: tagValue,
+	            title: tagValue
+	          };
 	        });
 
+	        callback(data);
+	      }));
+	      return;
+	    }
 
-	    function shortcutsModal(_modalSelection) {
-	        _modalSelection.select('.modal')
-	            .classed('modal-shortcuts', true);
+	    var geometry = context.graph().geometry(_entityIDs[0]);
+	    key.call(uiCombobox(context, 'tag-key').fetcher(function (value, callback) {
+	      taginfo.keys({
+	        debounce: true,
+	        geometry: geometry,
+	        query: value
+	      }, function (err, data) {
+	        if (!err) {
+	          var filtered = data.filter(function (d) {
+	            return _tags[d.value] === undefined;
+	          });
+	          callback(sort(value, filtered));
+	        }
+	      });
+	    }));
+	    value.call(uiCombobox(context, 'tag-value').fetcher(function (value, callback) {
+	      taginfo.values({
+	        debounce: true,
+	        key: utilGetSetValue(key),
+	        geometry: geometry,
+	        query: value
+	      }, function (err, data) {
+	        if (!err) callback(sort(value, data));
+	      });
+	    }));
 
-	        var content = _modalSelection.select('.content');
+	    function sort(value, data) {
+	      var sameletter = [];
+	      var other = [];
 
-	        content
-	            .append('div')
-	            .attr('class', 'modal-section')
-	            .append('h3')
-	            .text(_t('shortcuts.title'));
+	      for (var i = 0; i < data.length; i++) {
+	        if (data[i].value.substring(0, value.length) === value) {
+	          sameletter.push(data[i]);
+	        } else {
+	          other.push(data[i]);
+	        }
+	      }
 
-	        _mainFileFetcher.get('shortcuts')
-	            .then(function(data) { content.call(render, data); })
-	            .catch(function() { /* ignore */ });
+	      return sameletter.concat(other);
 	    }
+	  }
 
+	  function unbind() {
+	    var row = select(this);
+	    row.selectAll('input.key').call(uiCombobox.off, context);
+	    row.selectAll('input.value').call(uiCombobox.off, context);
+	  }
 
-	    function render(selection, dataShortcuts) {
-	        var wrapper = selection
-	            .selectAll('.wrapper')
-	            .data([0]);
+	  function keyChange(d3_event, d) {
+	    if (select(this).attr('readonly')) return;
+	    var kOld = d.key; // exit if we are currently about to delete this row anyway - #6366
 
-	        var wrapperEnter = wrapper
-	            .enter()
-	            .append('div')
-	            .attr('class', 'wrapper modal-section');
+	    if (_pendingChange && _pendingChange.hasOwnProperty(kOld) && _pendingChange[kOld] === undefined) return;
+	    var kNew = context.cleanTagKey(this.value.trim()); // allow no change if the key should be readonly
 
-	        var tabsBar = wrapperEnter
-	            .append('div')
-	            .attr('class', 'tabs-bar');
+	    if (isReadOnly({
+	      key: kNew
+	    })) {
+	      this.value = kOld;
+	      return;
+	    }
 
-	        var shortcutsList = wrapperEnter
-	            .append('div')
-	            .attr('class', 'shortcuts-list');
+	    if (kNew && kNew !== kOld && _tags[kNew] !== undefined) {
+	      // new key is already in use, switch focus to the existing row
+	      this.value = kOld; // reset the key
 
-	        wrapper = wrapper.merge(wrapperEnter);
+	      section.selection().selectAll('.tag-list input.value').each(function (d) {
+	        if (d.key === kNew) {
+	          // send focus to that other value combo instead
+	          var input = select(this).node();
+	          input.focus();
+	          input.select();
+	        }
+	      });
+	      return;
+	    }
 
-	        var tabs = tabsBar
-	            .selectAll('.tab')
-	            .data(dataShortcuts);
+	    var row = this.parentNode.parentNode;
+	    var inputVal = select(row).selectAll('input.value');
+	    var vNew = context.cleanTagValue(utilGetSetValue(inputVal));
+	    _pendingChange = _pendingChange || {};
 
-	        var tabsEnter = tabs
-	            .enter()
-	            .append('div')
-	            .attr('class', 'tab')
-	            .on('click', function (d, i) {
-	                _activeTab = i;
-	                render(selection, dataShortcuts);
-	            });
+	    if (kOld) {
+	      _pendingChange[kOld] = undefined;
+	    }
 
-	        tabsEnter
-	            .append('span')
-	            .text(function (d) { return _t(d.text); });
+	    _pendingChange[kNew] = vNew; // update the ordered key index so this row doesn't change position
 
-	        tabs = tabs
-	            .merge(tabsEnter);
+	    var existingKeyIndex = _orderedKeys.indexOf(kOld);
 
-	        // Update
-	        wrapper.selectAll('.tab')
-	            .classed('active', function (d, i) {
-	                return i === _activeTab;
-	            });
+	    if (existingKeyIndex !== -1) _orderedKeys[existingKeyIndex] = kNew;
+	    d.key = kNew; // update datum to avoid exit/enter on tag update
 
+	    d.value = vNew;
+	    this.value = kNew;
+	    utilGetSetValue(inputVal, vNew);
+	    scheduleChange();
+	  }
 
-	        var shortcuts = shortcutsList
-	            .selectAll('.shortcut-tab')
-	            .data(dataShortcuts);
+	  function valueChange(d3_event, d) {
+	    if (isReadOnly(d)) return; // exit if this is a multiselection and no value was entered
 
-	        var shortcutsEnter = shortcuts
-	            .enter()
-	            .append('div')
-	            .attr('class', function(d) { return 'shortcut-tab shortcut-tab-' + d.tab; });
+	    if (typeof d.value !== 'string' && !this.value) return; // exit if we are currently about to delete this row anyway - #6366
 
-	        var columnsEnter = shortcutsEnter
-	            .selectAll('.shortcut-column')
-	            .data(function (d) { return d.columns; })
-	            .enter()
-	            .append('table')
-	            .attr('class', 'shortcut-column');
+	    if (_pendingChange && _pendingChange.hasOwnProperty(d.key) && _pendingChange[d.key] === undefined) return;
+	    _pendingChange = _pendingChange || {};
+	    _pendingChange[d.key] = context.cleanTagValue(this.value);
+	    scheduleChange();
+	  }
 
-	        var rowsEnter = columnsEnter
-	            .selectAll('.shortcut-row')
-	            .data(function (d) { return d.rows; })
-	            .enter()
-	            .append('tr')
-	            .attr('class', 'shortcut-row');
+	  function removeTag(d3_event, d) {
+	    if (isReadOnly(d)) return;
 
+	    if (d.key === '') {
+	      // removing the blank row
+	      _showBlank = false;
+	      section.reRender();
+	    } else {
+	      // remove the key from the ordered key index
+	      _orderedKeys = _orderedKeys.filter(function (key) {
+	        return key !== d.key;
+	      });
+	      _pendingChange = _pendingChange || {};
+	      _pendingChange[d.key] = undefined;
+	      scheduleChange();
+	    }
+	  }
 
-	        var sectionRows = rowsEnter
-	            .filter(function (d) { return !d.shortcuts; });
+	  function addTag() {
+	    // Delay render in case this click is blurring an edited combo.
+	    // Without the setTimeout, the `content` render would wipe out the pending tag change.
+	    window.setTimeout(function () {
+	      _showBlank = true;
+	      section.reRender();
+	      section.selection().selectAll('.tag-list li:last-child input.key').node().focus();
+	    }, 20);
+	  }
 
-	        sectionRows
-	            .append('td');
+	  function scheduleChange() {
+	    // Cache IDs in case the editor is reloaded before the change event is called. - #6028
+	    var entityIDs = _entityIDs; // Delay change in case this change is blurring an edited combo. - #5878
 
-	        sectionRows
-	            .append('td')
-	            .attr('class', 'shortcut-section')
-	            .append('h3')
-	            .text(function (d) { return _t(d.text); });
+	    window.setTimeout(function () {
+	      if (!_pendingChange) return;
+	      dispatch.call('change', this, entityIDs, _pendingChange);
+	      _pendingChange = null;
+	    }, 10);
+	  }
 
+	  section.state = function (val) {
+	    if (!arguments.length) return _state;
 
-	        var shortcutRows = rowsEnter
-	            .filter(function (d) { return d.shortcuts; });
+	    if (_state !== val) {
+	      _orderedKeys = [];
+	      _state = val;
+	    }
 
-	        var shortcutKeys = shortcutRows
-	            .append('td')
-	            .attr('class', 'shortcut-keys');
+	    return section;
+	  };
 
-	        var modifierKeys = shortcutKeys
-	            .filter(function (d) { return d.modifiers; });
+	  section.presets = function (val) {
+	    if (!arguments.length) return _presets;
+	    _presets = val;
 
-	        modifierKeys
-	            .selectAll('kbd.modifier')
-	            .data(function (d) {
-	                if (detected.os === 'win' && d.text === 'shortcuts.editing.commands.redo') {
-	                    return ['⌘'];
-	                } else if (detected.os !== 'mac' && d.text === 'shortcuts.browsing.display_options.fullscreen') {
-	                    return [];
-	                } else {
-	                    return d.modifiers;
-	                }
-	            })
-	            .enter()
-	            .each(function () {
-	                var selection = select(this);
+	    if (_presets && _presets.length && _presets[0].isFallback()) {
+	      section.disclosureExpanded(true); // don't collapse the disclosure if the mapper used the raw tag editor - #1881
+	    } else if (!_didInteract) {
+	      section.disclosureExpanded(null);
+	    }
 
-	                selection
-	                    .append('kbd')
-	                    .attr('class', 'modifier')
-	                    .text(function (d) { return uiCmd.display(d); });
+	    return section;
+	  };
 
-	                selection
-	                    .append('span')
-	                    .text('+');
-	            });
+	  section.tags = function (val) {
+	    if (!arguments.length) return _tags;
+	    _tags = val;
+	    return section;
+	  };
 
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
 
-	        shortcutKeys
-	            .selectAll('kbd.shortcut')
-	            .data(function (d) {
-	                var arr = d.shortcuts;
-	                if (detected.os === 'win' && d.text === 'shortcuts.editing.commands.redo') {
-	                    arr = ['Y'];
-	                } else if (detected.os !== 'mac' && d.text === 'shortcuts.browsing.display_options.fullscreen') {
-	                    arr = ['F11'];
-	                }
+	    if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
+	      _entityIDs = val;
+	      _orderedKeys = [];
+	    }
 
-	                // replace translations
-	                arr = arr.map(function(s) {
-	                    return uiCmd.display(s.indexOf('.') !== -1 ? _t(s) : s);
-	                });
+	    return section;
+	  }; // pass an array of regular expressions to test against the tag key
 
-	                return utilArrayUniq(arr).map(function(s) {
-	                    return {
-	                        shortcut: s,
-	                        separator: d.separator,
-	                        suffix: d.suffix
-	                    };
-	                });
-	            })
-	            .enter()
-	            .each(function (d, i, nodes) {
-	                var selection = select(this);
-	                var click = d.shortcut.toLowerCase().match(/(.*).click/);
-
-	                if (click && click[1]) {   // replace "left_click", "right_click" with mouse icon
-	                    selection
-	                        .call(svgIcon('#iD-walkthrough-mouse-' + click[1], 'operation'));
-	                } else if (d.shortcut.toLowerCase() === 'long-press') {
-	                    selection
-	                        .call(svgIcon('#iD-walkthrough-longpress', 'longpress operation'));
-	                } else if (d.shortcut.toLowerCase() === 'tap') {
-	                    selection
-	                        .call(svgIcon('#iD-walkthrough-tap', 'tap operation'));
-	                } else {
-	                    selection
-	                        .append('kbd')
-	                        .attr('class', 'shortcut')
-	                        .text(function (d) { return d.shortcut; });
-	                }
 
-	                if (i < nodes.length - 1) {
-	                    selection
-	                        .append('span')
-	                        .text(d.separator || '\u00a0' + _t('shortcuts.or') + '\u00a0');
-	                } else if (i === nodes.length - 1 && d.suffix) {
-	                    selection
-	                        .append('span')
-	                        .text(d.suffix);
-	                }
-	            });
+	  section.readOnlyTags = function (val) {
+	    if (!arguments.length) return _readOnlyTags;
+	    _readOnlyTags = val;
+	    return section;
+	  };
 
+	  return utilRebind(section, dispatch, 'on');
+	}
 
-	        shortcutKeys
-	            .filter(function(d) { return d.gesture; })
-	            .each(function () {
-	                var selection = select(this);
+	function uiDataEditor(context) {
+	  var dataHeader = uiDataHeader();
+	  var rawTagEditor = uiSectionRawTagEditor('custom-data-tag-editor', context).expandedByDefault(true).readOnlyTags([/./]);
 
-	                selection
-	                    .append('span')
-	                    .text('+');
+	  var _datum;
 
-	                selection
-	                    .append('span')
-	                    .attr('class', 'gesture')
-	                    .text(function (d) { return _t(d.gesture); });
-	            });
+	  function dataEditor(selection) {
+	    var header = selection.selectAll('.header').data([0]);
+	    var headerEnter = header.enter().append('div').attr('class', 'header fillL');
+	    headerEnter.append('button').attr('class', 'close').on('click', function () {
+	      context.enter(modeBrowse(context));
+	    }).call(svgIcon('#iD-icon-close'));
+	    headerEnter.append('h3').html(_t.html('map_data.title'));
+	    var body = selection.selectAll('.body').data([0]);
+	    body = body.enter().append('div').attr('class', 'body').merge(body);
+	    var editor = body.selectAll('.data-editor').data([0]); // enter/update
 
+	    editor.enter().append('div').attr('class', 'modal-section data-editor').merge(editor).call(dataHeader.datum(_datum));
+	    var rte = body.selectAll('.raw-tag-editor').data([0]); // enter/update
 
-	        shortcutRows
-	            .append('td')
-	            .attr('class', 'shortcut-desc')
-	            .text(function (d) { return d.text ? _t(d.text) : '\u00a0'; });
+	    rte.enter().append('div').attr('class', 'raw-tag-editor data-editor').merge(rte).call(rawTagEditor.tags(_datum && _datum.properties || {}).state('hover').render).selectAll('textarea.tag-text').attr('readonly', true).classed('readonly', true);
+	  }
 
+	  dataEditor.datum = function (val) {
+	    if (!arguments.length) return _datum;
+	    _datum = val;
+	    return this;
+	  };
 
-	        shortcuts = shortcuts
-	            .merge(shortcutsEnter);
+	  return dataEditor;
+	}
 
-	        // Update
-	        wrapper.selectAll('.shortcut-tab')
-	            .style('display', function (d, i) {
-	                return i === _activeTab ? 'flex' : 'none';
-	            });
-	    }
+	var sexagesimal = {exports: {}};
 
+	sexagesimal.exports = element;
+	var pair_1 = sexagesimal.exports.pair = pair;
+	sexagesimal.exports.format = format;
+	sexagesimal.exports.formatPair = formatPair;
+	sexagesimal.exports.coordToDMS = coordToDMS;
 
-	    return function(selection, show) {
-	        _selection = selection;
-	        if (show) {
-	            _modalSelection = uiModal(selection);
-	            _modalSelection.call(shortcutsModal);
-	        }
-	    };
+	function element(input, dims) {
+	  var result = search(input, dims);
+	  return result === null ? null : result.val;
 	}
 
-	var pair_1 = pair;
+	function formatPair(input) {
+	  return format(input.lat, 'lat') + ' ' + format(input.lon, 'lon');
+	} // Is 0 North or South?
 
 
-	function search(input, dims) {
-	  if (!dims) { dims = 'NSEW'; }
-	  if (typeof input !== 'string') { return null; }
+	function format(input, dim) {
+	  var dms = coordToDMS(input, dim);
+	  return dms.whole + '° ' + (dms.minutes ? dms.minutes + '\' ' : '') + (dms.seconds ? dms.seconds + '" ' : '') + dms.dir;
+	}
+
+	function coordToDMS(input, dim) {
+	  var dirs = {
+	    lat: ['N', 'S'],
+	    lon: ['E', 'W']
+	  }[dim] || '';
+	  var dir = dirs[input >= 0 ? 0 : 1];
+	  var abs = Math.abs(input);
+	  var whole = Math.floor(abs);
+	  var fraction = abs - whole;
+	  var fractionMinutes = fraction * 60;
+	  var minutes = Math.floor(fractionMinutes);
+	  var seconds = Math.floor((fractionMinutes - minutes) * 60);
+	  return {
+	    whole: whole,
+	    minutes: minutes,
+	    seconds: seconds,
+	    dir: dir
+	  };
+	}
 
+	function search(input, dims) {
+	  if (!dims) dims = 'NSEW';
+	  if (typeof input !== 'string') return null;
 	  input = input.toUpperCase();
 	  var regex = /^[\s\,]*([NSEW])?\s*([\-|\—|\―]?[0-9.]+)[°º˚]?\s*(?:([0-9.]+)['’′‘]\s*)?(?:([0-9.]+)(?:''|"|”|″)\s*)?([NSEW])?/;
-
 	  var m = input.match(regex);
-	  if (!m) { return null; }  // no match
+	  if (!m) return null; // no match
 
-	  var matched = m[0];
+	  var matched = m[0]; // extract dimension.. m[1] = leading, m[5] = trailing
 
-	  // extract dimension.. m[1] = leading, m[5] = trailing
 	  var dim;
-	  if (m[1] && m[5]) {                 // if matched both..
-	    dim = m[1];                       // keep leading
-	    matched = matched.slice(0, -1);   // remove trailing dimension from match
+
+	  if (m[1] && m[5]) {
+	    // if matched both..
+	    dim = m[1]; // keep leading
+
+	    matched = matched.slice(0, -1); // remove trailing dimension from match
 	  } else {
 	    dim = m[1] || m[5];
-	  }
+	  } // if unrecognized dimension
+
 
-	  // if unrecognized dimension
-	  if (dim && dims.indexOf(dim) === -1) { return null; }
+	  if (dim && dims.indexOf(dim) === -1) return null; // extract DMS
 
-	  // extract DMS
 	  var deg = m[2] ? parseFloat(m[2]) : 0;
 	  var min = m[3] ? parseFloat(m[3]) / 60 : 0;
 	  var sec = m[4] ? parseFloat(m[4]) / 3600 : 0;
-	  var sign = (deg < 0) ? -1 : 1;
-	  if (dim === 'S' || dim === 'W') { sign *= -1; }
-
+	  var sign = deg < 0 ? -1 : 1;
+	  if (dim === 'S' || dim === 'W') sign *= -1;
 	  return {
 	    val: (Math.abs(deg) + min + sec) * sign,
 	    dim: dim,
@@ -82149,15 +78032,13 @@
 	  };
 	}
 
-
 	function pair(input, dims) {
 	  input = input.trim();
 	  var one = search(input, dims);
-	  if (!one) { return null; }
-
+	  if (!one) return null;
 	  input = one.remain.trim();
 	  var two = search(input, dims);
-	  if (!two || two.remain) { return null; }
+	  if (!two || two.remain) return null;
 
 	  if (one.dim) {
 	    return swapdim(one.val, two.val, one.dim);
@@ -82166,725 +78047,579 @@
 	  }
 	}
 
-
 	function swapdim(a, b, dim) {
-	  if (dim === 'N' || dim === 'S') { return [a, b]; }
-	  if (dim === 'W' || dim === 'E') { return [b, a]; }
+	  if (dim === 'N' || dim === 'S') return [a, b];
+	  if (dim === 'W' || dim === 'E') return [b, a];
 	}
 
 	function uiFeatureList(context) {
-	    var _geocodeResults;
-
-
-	    function featureList(selection) {
-	        var header = selection
-	            .append('div')
-	            .attr('class', 'header fillL cf');
-
-	        header
-	            .append('h3')
-	            .text(_t('inspector.feature_list'));
-
-	        var searchWrap = selection
-	            .append('div')
-	            .attr('class', 'search-header');
-
-	        var search = searchWrap
-	            .append('input')
-	            .attr('placeholder', _t('inspector.search'))
-	            .attr('type', 'search')
-	            .call(utilNoAuto)
-	            .on('keypress', keypress)
-	            .on('keydown', keydown)
-	            .on('input', inputevent);
-
-	        searchWrap
-	            .call(svgIcon('#iD-icon-search', 'pre-text'));
-
-	        var listWrap = selection
-	            .append('div')
-	            .attr('class', 'inspector-body');
-
-	        var list = listWrap
-	            .append('div')
-	            .attr('class', 'feature-list cf');
-
-	        context
-	            .on('exit.feature-list', clearSearch);
-	        context.map()
-	            .on('drawn.feature-list', mapDrawn);
-
-	        context.keybinding()
-	            .on(uiCmd('⌘F'), focusSearch);
-
-
-	        function focusSearch() {
-	            var mode = context.mode() && context.mode().id;
-	            if (mode !== 'browse') { return; }
-
-	            event.preventDefault();
-	            search.node().focus();
-	        }
-
-
-	        function keydown() {
-	            if (event.keyCode === 27) {  // escape
-	                search.node().blur();
-	            }
-	        }
-
-
-	        function keypress() {
-	            var q = search.property('value'),
-	                items = list.selectAll('.feature-list-item');
-	            if (event.keyCode === 13 && q.length && items.size()) {  // return
-	                click(items.datum());
-	            }
-	        }
-
-
-	        function inputevent() {
-	            _geocodeResults = undefined;
-	            drawList();
-	        }
-
-
-	        function clearSearch() {
-	            search.property('value', '');
-	            drawList();
-	        }
-
-
-	        function mapDrawn(e) {
-	            if (e.full) {
-	                drawList();
-	            }
-	        }
-
-
-	        function features() {
-	            var result = [];
-	            var graph = context.graph();
-	            var visibleCenter = context.map().extent().center();
-	            var q = search.property('value').toLowerCase();
-
-	            if (!q) { return result; }
-
-	            var idMatch = q.match(/(?:^|\W)(node|way|relation|[nwr])\W?0*([1-9]\d*)(?:\W|$)/i);
-
-	            if (idMatch) {
-	                var elemType = idMatch[1].charAt(0);
-	                var elemId = idMatch[2];
-	                result.push({
-	                    id: elemType + elemId,
-	                    geometry: elemType === 'n' ? 'point' : elemType === 'w' ? 'line' : 'relation',
-	                    type: elemType === 'n' ? _t('inspector.node') : elemType === 'w' ? _t('inspector.way') : _t('inspector.relation'),
-	                    name: elemId
-	                });
-	            }
-
-	            var locationMatch = pair_1(q.toUpperCase()) || q.match(/^(-?\d+\.?\d*)\s+(-?\d+\.?\d*)$/);
-
-	            if (locationMatch) {
-	                var loc = [parseFloat(locationMatch[0]), parseFloat(locationMatch[1])];
-	                result.push({
-	                    id: -1,
-	                    geometry: 'point',
-	                    type: _t('inspector.location'),
-	                    name: dmsCoordinatePair([loc[1], loc[0]]),
-	                    location: loc
-	                });
-	            }
-
-	            var allEntities = graph.entities;
-	            var localResults = [];
-	            for (var id in allEntities) {
-	                var entity = allEntities[id];
-	                if (!entity) { continue; }
-
-	                var name = utilDisplayName(entity) || '';
-	                if (name.toLowerCase().indexOf(q) < 0) { continue; }
-
-	                var matched = _mainPresetIndex.match(entity, graph);
-	                var type = (matched && matched.name()) || utilDisplayType(entity.id);
-	                var extent = entity.extent(graph);
-	                var distance = extent ? geoSphericalDistance(visibleCenter, extent.center()) : 0;
-
-	                localResults.push({
-	                    id: entity.id,
-	                    entity: entity,
-	                    geometry: entity.geometry(graph),
-	                    type: type,
-	                    name: name,
-	                    distance: distance
-	                });
-
-	                if (localResults.length > 100) { break; }
-	            }
-	            localResults = localResults.sort(function byDistance(a, b) {
-	                return a.distance - b.distance;
-	            });
-	            result = result.concat(localResults);
-
-	            (_geocodeResults || []).forEach(function(d) {
-	                if (d.osm_type && d.osm_id) {    // some results may be missing these - #1890
-
-	                    // Make a temporary osmEntity so we can preset match
-	                    // and better localize the search result - #4725
-	                    var id = osmEntity.id.fromOSM(d.osm_type, d.osm_id);
-	                    var tags = {};
-	                    tags[d.class] = d.type;
-
-	                    var attrs = { id: id, type: d.osm_type, tags: tags };
-	                    if (d.osm_type === 'way') {   // for ways, add some fake closed nodes
-	                        attrs.nodes = ['a','a'];  // so that geometry area is possible
-	                    }
-
-	                    var tempEntity = osmEntity(attrs);
-	                    var tempGraph = coreGraph([tempEntity]);
-	                    var matched = _mainPresetIndex.match(tempEntity, tempGraph);
-	                    var type = (matched && matched.name()) || utilDisplayType(id);
-
-	                    result.push({
-	                        id: tempEntity.id,
-	                        geometry: tempEntity.geometry(tempGraph),
-	                        type: type,
-	                        name: d.display_name,
-	                        extent: new geoExtent(
-	                            [parseFloat(d.boundingbox[3]), parseFloat(d.boundingbox[0])],
-	                            [parseFloat(d.boundingbox[2]), parseFloat(d.boundingbox[1])])
-	                    });
-	                }
-	            });
-
-	            if (q.match(/^[0-9]+$/)) {
-	                // if query is just a number, possibly an OSM ID without a prefix
-	                result.push({
-	                    id: 'n' + q,
-	                    geometry: 'point',
-	                    type: _t('inspector.node'),
-	                    name: q
-	                });
-	                result.push({
-	                    id: 'w' + q,
-	                    geometry: 'line',
-	                    type: _t('inspector.way'),
-	                    name: q
-	                });
-	                result.push({
-	                    id: 'r' + q,
-	                    geometry: 'relation',
-	                    type: _t('inspector.relation'),
-	                    name: q
-	                });
-	            }
-
-	            return result;
-	        }
-
-
-	        function drawList() {
-	            var value = search.property('value');
-	            var results = features();
-
-	            list.classed('filtered', value.length);
-
-	            var resultsIndicator = list.selectAll('.no-results-item')
-	                .data([0])
-	                .enter()
-	                .append('button')
-	                .property('disabled', true)
-	                .attr('class', 'no-results-item')
-	                .call(svgIcon('#iD-icon-alert', 'pre-text'));
-
-	            resultsIndicator.append('span')
-	                .attr('class', 'entity-name');
-
-	            list.selectAll('.no-results-item .entity-name')
-	                .text(_t('geocoder.no_results_worldwide'));
-
-	            if (services.geocoder) {
-	              list.selectAll('.geocode-item')
-	                  .data([0])
-	                  .enter()
-	                  .append('button')
-	                  .attr('class', 'geocode-item')
-	                  .on('click', geocoderSearch)
-	                  .append('div')
-	                  .attr('class', 'label')
-	                  .append('span')
-	                  .attr('class', 'entity-name')
-	                  .text(_t('geocoder.search'));
-	            }
-
-	            list.selectAll('.no-results-item')
-	                .style('display', (value.length && !results.length) ? 'block' : 'none');
-
-	            list.selectAll('.geocode-item')
-	                .style('display', (value && _geocodeResults === undefined) ? 'block' : 'none');
-
-	            list.selectAll('.feature-list-item')
-	                .data([-1])
-	                .remove();
-
-	            var items = list.selectAll('.feature-list-item')
-	                .data(results, function(d) { return d.id; });
-
-	            var enter = items.enter()
-	                .insert('button', '.geocode-item')
-	                .attr('class', 'feature-list-item')
-	                .on('mouseover', mouseover)
-	                .on('mouseout', mouseout)
-	                .on('click', click);
-
-	            var label = enter
-	                .append('div')
-	                .attr('class', 'label');
-
-	            label
-	                .each(function(d) {
-	                    select(this)
-	                        .call(svgIcon('#iD-icon-' + d.geometry, 'pre-text'));
-	                });
-
-	            label
-	                .append('span')
-	                .attr('class', 'entity-type')
-	                .text(function(d) { return d.type; });
-
-	            label
-	                .append('span')
-	                .attr('class', 'entity-name')
-	                .text(function(d) { return d.name; });
-
-	            enter
-	                .style('opacity', 0)
-	                .transition()
-	                .style('opacity', 1);
+	  var _geocodeResults;
+
+	  function featureList(selection) {
+	    var header = selection.append('div').attr('class', 'header fillL');
+	    header.append('h3').html(_t.html('inspector.feature_list'));
+	    var searchWrap = selection.append('div').attr('class', 'search-header');
+	    searchWrap.call(svgIcon('#iD-icon-search', 'pre-text'));
+	    var search = searchWrap.append('input').attr('placeholder', _t('inspector.search')).attr('type', 'search').call(utilNoAuto).on('keypress', keypress).on('keydown', keydown).on('input', inputevent);
+	    var listWrap = selection.append('div').attr('class', 'inspector-body');
+	    var list = listWrap.append('div').attr('class', 'feature-list');
+	    context.on('exit.feature-list', clearSearch);
+	    context.map().on('drawn.feature-list', mapDrawn);
+	    context.keybinding().on(uiCmd('⌘F'), focusSearch);
+
+	    function focusSearch(d3_event) {
+	      var mode = context.mode() && context.mode().id;
+	      if (mode !== 'browse') return;
+	      d3_event.preventDefault();
+	      search.node().focus();
+	    }
+
+	    function keydown(d3_event) {
+	      if (d3_event.keyCode === 27) {
+	        // escape
+	        search.node().blur();
+	      }
+	    }
 
-	            items.order();
+	    function keypress(d3_event) {
+	      var q = search.property('value'),
+	          items = list.selectAll('.feature-list-item');
 
-	            items.exit()
-	                .remove();
-	        }
+	      if (d3_event.keyCode === 13 && // ↩ Return
+	      q.length && items.size()) {
+	        click(d3_event, items.datum());
+	      }
+	    }
 
+	    function inputevent() {
+	      _geocodeResults = undefined;
+	      drawList();
+	    }
 
-	        function mouseover(d) {
-	            if (d.id === -1) { return; }
+	    function clearSearch() {
+	      search.property('value', '');
+	      drawList();
+	    }
 
-	            utilHighlightEntities([d.id], true, context);
-	        }
+	    function mapDrawn(e) {
+	      if (e.full) {
+	        drawList();
+	      }
+	    }
 
+	    function features() {
+	      var result = [];
+	      var graph = context.graph();
+	      var visibleCenter = context.map().extent().center();
+	      var q = search.property('value').toLowerCase();
+	      if (!q) return result;
+	      var locationMatch = pair_1(q.toUpperCase()) || q.match(/^(-?\d+\.?\d*)\s+(-?\d+\.?\d*)$/);
+
+	      if (locationMatch) {
+	        var loc = [parseFloat(locationMatch[0]), parseFloat(locationMatch[1])];
+	        result.push({
+	          id: -1,
+	          geometry: 'point',
+	          type: _t('inspector.location'),
+	          name: dmsCoordinatePair([loc[1], loc[0]]),
+	          location: loc
+	        });
+	      } // A location search takes priority over an ID search
 
-	        function mouseout(d) {
-	            if (d.id === -1) { return; }
 
-	            utilHighlightEntities([d.id], false, context);
-	        }
+	      var idMatch = !locationMatch && q.match(/(?:^|\W)(node|way|relation|[nwr])\W?0*([1-9]\d*)(?:\W|$)/i);
 
+	      if (idMatch) {
+	        var elemType = idMatch[1].charAt(0);
+	        var elemId = idMatch[2];
+	        result.push({
+	          id: elemType + elemId,
+	          geometry: elemType === 'n' ? 'point' : elemType === 'w' ? 'line' : 'relation',
+	          type: elemType === 'n' ? _t('inspector.node') : elemType === 'w' ? _t('inspector.way') : _t('inspector.relation'),
+	          name: elemId
+	        });
+	      }
 
-	        function click(d) {
-	            event.preventDefault();
+	      var allEntities = graph.entities;
+	      var localResults = [];
 
-	            if (d.location) {
-	                context.map().centerZoomEase([d.location[1], d.location[0]], 19);
+	      for (var id in allEntities) {
+	        var entity = allEntities[id];
+	        if (!entity) continue;
+	        var name = utilDisplayName(entity) || '';
+	        if (name.toLowerCase().indexOf(q) < 0) continue;
+	        var matched = _mainPresetIndex.match(entity, graph);
+	        var type = matched && matched.name() || utilDisplayType(entity.id);
+	        var extent = entity.extent(graph);
+	        var distance = extent ? geoSphericalDistance(visibleCenter, extent.center()) : 0;
+	        localResults.push({
+	          id: entity.id,
+	          entity: entity,
+	          geometry: entity.geometry(graph),
+	          type: type,
+	          name: name,
+	          distance: distance
+	        });
+	        if (localResults.length > 100) break;
+	      }
 
-	            } else if (d.entity) {
-	                utilHighlightEntities([d.id], false, context);
+	      localResults = localResults.sort(function byDistance(a, b) {
+	        return a.distance - b.distance;
+	      });
+	      result = result.concat(localResults);
+
+	      (_geocodeResults || []).forEach(function (d) {
+	        if (d.osm_type && d.osm_id) {
+	          // some results may be missing these - #1890
+	          // Make a temporary osmEntity so we can preset match
+	          // and better localize the search result - #4725
+	          var id = osmEntity.id.fromOSM(d.osm_type, d.osm_id);
+	          var tags = {};
+	          tags[d["class"]] = d.type;
+	          var attrs = {
+	            id: id,
+	            type: d.osm_type,
+	            tags: tags
+	          };
 
-	                context.enter(modeSelect(context, [d.entity.id]));
-	                context.map().zoomToEase(d.entity);
+	          if (d.osm_type === 'way') {
+	            // for ways, add some fake closed nodes
+	            attrs.nodes = ['a', 'a']; // so that geometry area is possible
+	          }
 
-	            } else {
-	                // download, zoom to, and select the entity with the given ID
-	                context.zoomToEntity(d.id);
-	            }
+	          var tempEntity = osmEntity(attrs);
+	          var tempGraph = coreGraph([tempEntity]);
+	          var matched = _mainPresetIndex.match(tempEntity, tempGraph);
+	          var type = matched && matched.name() || utilDisplayType(id);
+	          result.push({
+	            id: tempEntity.id,
+	            geometry: tempEntity.geometry(tempGraph),
+	            type: type,
+	            name: d.display_name,
+	            extent: new geoExtent([parseFloat(d.boundingbox[3]), parseFloat(d.boundingbox[0])], [parseFloat(d.boundingbox[2]), parseFloat(d.boundingbox[1])])
+	          });
 	        }
+	      });
 
+	      if (q.match(/^[0-9]+$/)) {
+	        // if query is just a number, possibly an OSM ID without a prefix
+	        result.push({
+	          id: 'n' + q,
+	          geometry: 'point',
+	          type: _t('inspector.node'),
+	          name: q
+	        });
+	        result.push({
+	          id: 'w' + q,
+	          geometry: 'line',
+	          type: _t('inspector.way'),
+	          name: q
+	        });
+	        result.push({
+	          id: 'r' + q,
+	          geometry: 'relation',
+	          type: _t('inspector.relation'),
+	          name: q
+	        });
+	      }
 
-	        function geocoderSearch() {
-	            services.geocoder.search(search.property('value'), function (err, resp) {
-	                _geocodeResults = resp || [];
-	                drawList();
-	            });
-	        }
+	      return result;
 	    }
 
+	    function drawList() {
+	      var value = search.property('value');
+	      var results = features();
+	      list.classed('filtered', value.length);
+	      var resultsIndicator = list.selectAll('.no-results-item').data([0]).enter().append('button').property('disabled', true).attr('class', 'no-results-item').call(svgIcon('#iD-icon-alert', 'pre-text'));
+	      resultsIndicator.append('span').attr('class', 'entity-name');
+	      list.selectAll('.no-results-item .entity-name').html(_t.html('geocoder.no_results_worldwide'));
 
-	    return featureList;
-	}
-
-	function uiSectionEntityIssues(context) {
-
-	    var _entityIDs = [];
-	    var _issues = [];
-	    var _activeIssueID;
-
-	    var section = uiSection('entity-issues', context)
-	        .shouldDisplay(function() {
-	            return _issues.length > 0;
-	        })
-	        .title(function() {
-	            return _t('issues.list_title', { count: _issues.length });
-	        })
-	        .disclosureContent(renderDisclosureContent);
-
-	    context.validator()
-	        .on('validated.entity_issues', function() {
-	            // Refresh on validated events
-	            reloadIssues();
-	            section.reRender();
-	        })
-	        .on('focusedIssue.entity_issues', function(issue) {
-	             makeActiveIssue(issue.id);
-	        });
+	      if (services.geocoder) {
+	        list.selectAll('.geocode-item').data([0]).enter().append('button').attr('class', 'geocode-item secondary-action').on('click', geocoderSearch).append('div').attr('class', 'label').append('span').attr('class', 'entity-name').html(_t.html('geocoder.search'));
+	      }
 
-	    function reloadIssues() {
-	        _issues = context.validator().getSharedEntityIssues(_entityIDs, { includeDisabledRules: true });
+	      list.selectAll('.no-results-item').style('display', value.length && !results.length ? 'block' : 'none');
+	      list.selectAll('.geocode-item').style('display', value && _geocodeResults === undefined ? 'block' : 'none');
+	      list.selectAll('.feature-list-item').data([-1]).remove();
+	      var items = list.selectAll('.feature-list-item').data(results, function (d) {
+	        return d.id;
+	      });
+	      var enter = items.enter().insert('button', '.geocode-item').attr('class', 'feature-list-item').on('mouseover', mouseover).on('mouseout', mouseout).on('click', click);
+	      var label = enter.append('div').attr('class', 'label');
+	      label.each(function (d) {
+	        select(this).call(svgIcon('#iD-icon-' + d.geometry, 'pre-text'));
+	      });
+	      label.append('span').attr('class', 'entity-type').html(function (d) {
+	        return d.type;
+	      });
+	      label.append('span').attr('class', 'entity-name').html(function (d) {
+	        return d.name;
+	      });
+	      enter.style('opacity', 0).transition().style('opacity', 1);
+	      items.order();
+	      items.exit().remove();
 	    }
 
-	    function makeActiveIssue(issueID) {
-	        _activeIssueID = issueID;
-	        section.selection().selectAll('.issue-container')
-	            .classed('active', function(d) { return d.id === _activeIssueID; });
+	    function mouseover(d3_event, d) {
+	      if (d.id === -1) return;
+	      utilHighlightEntities([d.id], true, context);
 	    }
 
-	    function renderDisclosureContent(selection) {
+	    function mouseout(d3_event, d) {
+	      if (d.id === -1) return;
+	      utilHighlightEntities([d.id], false, context);
+	    }
 
-	        selection.classed('grouped-items-area', true);
+	    function click(d3_event, d) {
+	      d3_event.preventDefault();
 
-	        _activeIssueID = _issues.length > 0 ? _issues[0].id : null;
+	      if (d.location) {
+	        context.map().centerZoomEase([d.location[1], d.location[0]], 19);
+	      } else if (d.entity) {
+	        utilHighlightEntities([d.id], false, context);
+	        context.enter(modeSelect(context, [d.entity.id]));
+	        context.map().zoomToEase(d.entity);
+	      } else {
+	        // download, zoom to, and select the entity with the given ID
+	        context.zoomToEntity(d.id);
+	      }
+	    }
 
-	        var containers = selection.selectAll('.issue-container')
-	            .data(_issues, function(d) { return d.id; });
+	    function geocoderSearch() {
+	      services.geocoder.search(search.property('value'), function (err, resp) {
+	        _geocodeResults = resp || [];
+	        drawList();
+	      });
+	    }
+	  }
 
-	        // Exit
-	        containers.exit()
-	            .remove();
+	  return featureList;
+	}
 
-	        // Enter
-	        var containersEnter = containers.enter()
-	            .append('div')
-	            .attr('class', 'issue-container');
+	var $$1 = _export;
+	var getOwnPropertyDescriptor$1 = objectGetOwnPropertyDescriptor.f;
+	var toLength$1 = toLength$q;
+	var notARegExp$1 = notARegexp;
+	var requireObjectCoercible$1 = requireObjectCoercible$e;
+	var correctIsRegExpLogic$1 = correctIsRegexpLogic;
 
+	// eslint-disable-next-line es/no-string-prototype-startswith -- safe
+	var $startsWith = ''.startsWith;
+	var min$1 = Math.min;
 
-	        var itemsEnter = containersEnter
-	            .append('div')
-	            .attr('class', function(d) { return 'issue severity-' + d.severity; })
-	            .on('mouseover.highlight', function(d) {
-	                // don't hover-highlight the selected entity
-	                var ids = d.entityIds
-	                    .filter(function(e) { return _entityIDs.indexOf(e) === -1; });
-
-	                utilHighlightEntities(ids, true, context);
-	            })
-	            .on('mouseout.highlight', function(d) {
-	                var ids = d.entityIds
-	                    .filter(function(e) { return _entityIDs.indexOf(e) === -1; });
-
-	                utilHighlightEntities(ids, false, context);
-	            });
+	var CORRECT_IS_REGEXP_LOGIC$1 = correctIsRegExpLogic$1('startsWith');
+	// https://github.com/zloirock/core-js/pull/702
+	var MDN_POLYFILL_BUG$1 = !CORRECT_IS_REGEXP_LOGIC$1 && !!function () {
+	  var descriptor = getOwnPropertyDescriptor$1(String.prototype, 'startsWith');
+	  return descriptor && !descriptor.writable;
+	}();
 
-	        var labelsEnter = itemsEnter
-	            .append('div')
-	            .attr('class', 'issue-label')
-	            .on('click', function(d) {
+	// `String.prototype.startsWith` method
+	// https://tc39.es/ecma262/#sec-string.prototype.startswith
+	$$1({ target: 'String', proto: true, forced: !MDN_POLYFILL_BUG$1 && !CORRECT_IS_REGEXP_LOGIC$1 }, {
+	  startsWith: function startsWith(searchString /* , position = 0 */) {
+	    var that = String(requireObjectCoercible$1(this));
+	    notARegExp$1(searchString);
+	    var index = toLength$1(min$1(arguments.length > 1 ? arguments[1] : undefined, that.length));
+	    var search = String(searchString);
+	    return $startsWith
+	      ? $startsWith.call(that, search, index)
+	      : that.slice(index, index + search.length) === search;
+	  }
+	});
 
-	                makeActiveIssue(d.id); // expand only the clicked item
+	function uiSectionEntityIssues(context) {
+	  // Does the user prefer to expand the active issue?  Useful for viewing tag diff.
+	  // Expand by default so first timers see it - #6408, #8143
+	  var preference = corePreferences('entity-issues.reference.expanded');
 
-	                var extent = d.extent(context.graph());
-	                if (extent) {
-	                    var setZoom = Math.max(context.map().zoom(), 19);
-	                    context.map().unobscuredCenterZoomEase(extent.center(), setZoom);
-	                }
-	            });
+	  var _expanded = preference === null ? true : preference === 'true';
 
-	        var textEnter = labelsEnter
-	            .append('span')
-	            .attr('class', 'issue-text');
-
-	        textEnter
-	            .append('span')
-	            .attr('class', 'issue-icon')
-	            .each(function(d) {
-	                var iconName = '#iD-icon-' + (d.severity === 'warning' ? 'alert' : 'error');
-	                select(this)
-	                    .call(svgIcon(iconName));
-	            });
+	  var _entityIDs = [];
+	  var _issues = [];
 
-	        textEnter
-	            .append('span')
-	            .attr('class', 'issue-message');
-
-
-	        var infoButton = labelsEnter
-	            .append('button')
-	            .attr('class', 'issue-info-button')
-	            .attr('title', _t('icons.information'))
-	            .attr('tabindex', -1)
-	            .call(svgIcon('#iD-icon-inspect'));
-
-	        infoButton
-	            .on('click', function () {
-	                event.stopPropagation();
-	                event.preventDefault();
-	                this.blur();    // avoid keeping focus on the button - #4641
-
-	                var container = select(this.parentNode.parentNode.parentNode);
-	                var info = container.selectAll('.issue-info');
-	                var isExpanded = info.classed('expanded');
-
-	                if (isExpanded) {
-	                    info
-	                        .transition()
-	                        .duration(200)
-	                        .style('max-height', '0px')
-	                        .style('opacity', '0')
-	                        .on('end', function () {
-	                            info.classed('expanded', false);
-	                        });
-	                } else {
-	                    info
-	                        .classed('expanded', true)
-	                        .transition()
-	                        .duration(200)
-	                        .style('max-height', '200px')
-	                        .style('opacity', '1')
-	                        .on('end', function () {
-	                            info.style('max-height', null);
-	                        });
-	                }
-	            });
+	  var _activeIssueID;
 
-	        itemsEnter
-	            .append('ul')
-	            .attr('class', 'issue-fix-list');
+	  var section = uiSection('entity-issues', context).shouldDisplay(function () {
+	    return _issues.length > 0;
+	  }).label(function () {
+	    return _t('inspector.title_count', {
+	      title: _t.html('issues.list_title'),
+	      count: _issues.length
+	    });
+	  }).disclosureContent(renderDisclosureContent);
+	  context.validator().on('validated.entity_issues', function () {
+	    // Refresh on validated events
+	    reloadIssues();
+	    section.reRender();
+	  }).on('focusedIssue.entity_issues', function (issue) {
+	    makeActiveIssue(issue.id);
+	  });
 
-	        containersEnter
-	            .append('div')
-	            .attr('class', 'issue-info')
-	            .style('max-height', '0')
-	            .style('opacity', '0')
-	            .each(function(d) {
-	                if (typeof d.reference === 'function') {
-	                    select(this)
-	                        .call(d.reference);
-	                } else {
-	                    select(this)
-	                        .text(_t('inspector.no_documentation_key'));
-	                }
-	            });
+	  function reloadIssues() {
+	    _issues = context.validator().getSharedEntityIssues(_entityIDs, {
+	      includeDisabledRules: true
+	    });
+	  }
 
+	  function makeActiveIssue(issueID) {
+	    _activeIssueID = issueID;
+	    section.selection().selectAll('.issue-container').classed('active', function (d) {
+	      return d.id === _activeIssueID;
+	    });
+	  }
 
-	        // Update
-	        containers = containers
-	            .merge(containersEnter)
-	            .classed('active', function(d) { return d.id === _activeIssueID; });
+	  function renderDisclosureContent(selection) {
+	    selection.classed('grouped-items-area', true);
+	    _activeIssueID = _issues.length > 0 ? _issues[0].id : null;
+	    var containers = selection.selectAll('.issue-container').data(_issues, function (d) {
+	      return d.key;
+	    }); // Exit
 
-	        containers.selectAll('.issue-message')
-	            .text(function(d) {
-	                return d.message(context);
-	            });
+	    containers.exit().remove(); // Enter
 
-	        // fixes
-	        var fixLists = containers.selectAll('.issue-fix-list');
+	    var containersEnter = containers.enter().append('div').attr('class', 'issue-container');
+	    var itemsEnter = containersEnter.append('div').attr('class', function (d) {
+	      return 'issue severity-' + d.severity;
+	    }).on('mouseover.highlight', function (d3_event, d) {
+	      // don't hover-highlight the selected entity
+	      var ids = d.entityIds.filter(function (e) {
+	        return _entityIDs.indexOf(e) === -1;
+	      });
+	      utilHighlightEntities(ids, true, context);
+	    }).on('mouseout.highlight', function (d3_event, d) {
+	      var ids = d.entityIds.filter(function (e) {
+	        return _entityIDs.indexOf(e) === -1;
+	      });
+	      utilHighlightEntities(ids, false, context);
+	    });
+	    var labelsEnter = itemsEnter.append('div').attr('class', 'issue-label');
+	    var textEnter = labelsEnter.append('button').attr('class', 'issue-text').on('click', function (d3_event, d) {
+	      makeActiveIssue(d.id); // expand only the clicked item
 
-	        var fixes = fixLists.selectAll('.issue-fix-item')
-	            .data(function(d) { return d.fixes ? d.fixes(context) : []; }, function(fix) { return fix.id; });
+	      var extent = d.extent(context.graph());
 
-	        fixes.exit()
-	            .remove();
+	      if (extent) {
+	        var setZoom = Math.max(context.map().zoom(), 19);
+	        context.map().unobscuredCenterZoomEase(extent.center(), setZoom);
+	      }
+	    });
+	    textEnter.each(function (d) {
+	      var iconName = '#iD-icon-' + (d.severity === 'warning' ? 'alert' : 'error');
+	      select(this).call(svgIcon(iconName, 'issue-icon'));
+	    });
+	    textEnter.append('span').attr('class', 'issue-message');
+	    var infoButton = labelsEnter.append('button').attr('class', 'issue-info-button').attr('title', _t('icons.information')).call(svgIcon('#iD-icon-inspect'));
+	    infoButton.on('click', function (d3_event) {
+	      d3_event.stopPropagation();
+	      d3_event.preventDefault();
+	      this.blur(); // avoid keeping focus on the button - #4641
+
+	      var container = select(this.parentNode.parentNode.parentNode);
+	      var info = container.selectAll('.issue-info');
+	      var isExpanded = info.classed('expanded');
+	      _expanded = !isExpanded;
+	      corePreferences('entity-issues.reference.expanded', _expanded); // update preference
+
+	      if (isExpanded) {
+	        info.transition().duration(200).style('max-height', '0px').style('opacity', '0').on('end', function () {
+	          info.classed('expanded', false);
+	        });
+	      } else {
+	        info.classed('expanded', true).transition().duration(200).style('max-height', '200px').style('opacity', '1').on('end', function () {
+	          info.style('max-height', null);
+	        });
+	      }
+	    });
+	    itemsEnter.append('ul').attr('class', 'issue-fix-list');
+	    containersEnter.append('div').attr('class', 'issue-info' + (_expanded ? ' expanded' : '')).style('max-height', _expanded ? null : '0').style('opacity', _expanded ? '1' : '0').each(function (d) {
+	      if (typeof d.reference === 'function') {
+	        select(this).call(d.reference);
+	      } else {
+	        select(this).html(_t.html('inspector.no_documentation_key'));
+	      }
+	    }); // Update
 
-	        var fixesEnter = fixes.enter()
-	            .append('li')
-	            .attr('class', 'issue-fix-item')
-	            .on('click', function(d) {
-	                // not all fixes are actionable
-	                if (!select(this).classed('actionable') || !d.onClick) { return; }
+	    containers = containers.merge(containersEnter).classed('active', function (d) {
+	      return d.id === _activeIssueID;
+	    });
+	    containers.selectAll('.issue-message').html(function (d) {
+	      return d.message(context);
+	    }); // fixes
+
+	    var fixLists = containers.selectAll('.issue-fix-list');
+	    var fixes = fixLists.selectAll('.issue-fix-item').data(function (d) {
+	      return d.fixes ? d.fixes(context) : [];
+	    }, function (fix) {
+	      return fix.id;
+	    });
+	    fixes.exit().remove();
+	    var fixesEnter = fixes.enter().append('li').attr('class', 'issue-fix-item');
+	    var buttons = fixesEnter.append('button').on('click', function (d3_event, d) {
+	      // not all fixes are actionable
+	      if (select(this).attr('disabled') || !d.onClick) return; // Don't run another fix for this issue within a second of running one
+	      // (Necessary for "Select a feature type" fix. Most fixes should only ever run once)
+
+	      if (d.issue.dateLastRanFix && new Date() - d.issue.dateLastRanFix < 1000) return;
+	      d.issue.dateLastRanFix = new Date(); // remove hover-highlighting
+
+	      utilHighlightEntities(d.issue.entityIds.concat(d.entityIds), false, context);
+	      new Promise(function (resolve, reject) {
+	        d.onClick(context, resolve, reject);
+
+	        if (d.onClick.length <= 1) {
+	          // if the fix doesn't take any completion parameters then consider it resolved
+	          resolve();
+	        }
+	      }).then(function () {
+	        // revalidate whenever the fix has finished running successfully
+	        context.validator().validate();
+	      });
+	    }).on('mouseover.highlight', function (d3_event, d) {
+	      utilHighlightEntities(d.entityIds, true, context);
+	    }).on('mouseout.highlight', function (d3_event, d) {
+	      utilHighlightEntities(d.entityIds, false, context);
+	    });
+	    buttons.each(function (d) {
+	      var iconName = d.icon || 'iD-icon-wrench';
 
-	                // Don't run another fix for this issue within a second of running one
-	                // (Necessary for "Select a feature type" fix. Most fixes should only ever run once)
-	                if (d.issue.dateLastRanFix && new Date() - d.issue.dateLastRanFix < 1000) { return; }
-	                d.issue.dateLastRanFix = new Date();
+	      if (iconName.startsWith('maki')) {
+	        iconName += '-15';
+	      }
 
-	                // remove hover-highlighting
-	                utilHighlightEntities(d.issue.entityIds.concat(d.entityIds), false, context);
+	      select(this).call(svgIcon('#' + iconName, 'fix-icon'));
+	    });
+	    buttons.append('span').attr('class', 'fix-message').html(function (d) {
+	      return d.title;
+	    });
+	    fixesEnter.merge(fixes).selectAll('button').classed('actionable', function (d) {
+	      return d.onClick;
+	    }).attr('disabled', function (d) {
+	      return d.onClick ? null : 'true';
+	    }).attr('title', function (d) {
+	      if (d.disabledReason) {
+	        return d.disabledReason;
+	      }
 
-	                new Promise(function(resolve, reject) {
-	                    d.onClick(context, resolve, reject);
-	                    if (d.onClick.length <= 1) {
-	                        // if the fix doesn't take any completion parameters then consider it resolved
-	                        resolve();
-	                    }
-	                })
-	                .then(function() {
-	                    // revalidate whenever the fix has finished running successfully
-	                    context.validator().validate();
-	                });
-	            })
-	            .on('mouseover.highlight', function(d) {
-	                utilHighlightEntities(d.entityIds, true, context);
-	            })
-	            .on('mouseout.highlight', function(d) {
-	                utilHighlightEntities(d.entityIds, false, context);
-	            });
+	      return null;
+	    });
+	  }
 
-	        fixesEnter
-	            .append('span')
-	            .attr('class', 'fix-icon')
-	            .each(function(d) {
-	                var iconName = d.icon || 'iD-icon-wrench';
-	                if (iconName.startsWith('maki')) {
-	                    iconName += '-15';
-	                }
-	                select(this).call(svgIcon('#' + iconName));
-	            });
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
 
-	        fixesEnter
-	            .append('span')
-	            .attr('class', 'fix-message')
-	            .text(function(d) { return d.title; });
-
-	        fixesEnter.merge(fixes)
-	            .classed('actionable', function(d) {
-	                return d.onClick;
-	            })
-	            .attr('title', function(d) {
-	                if (d.disabledReason) {
-	                    return d.disabledReason;
-	                }
-	                return null;
-	            });
+	    if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
+	      _entityIDs = val;
+	      _activeIssueID = null;
+	      reloadIssues();
 	    }
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
-	            _entityIDs = val;
-	            _activeIssueID = null;
-	            reloadIssues();
-	        }
-	        return section;
-	    };
-
 	    return section;
+	  };
+
+	  return section;
 	}
 
 	function uiPresetIcon() {
 	  var _preset;
+
 	  var _geometry;
-	  var _sizeClass = 'medium';
 
+	  var _sizeClass = 'medium';
 
 	  function isSmall() {
 	    return _sizeClass === 'small';
 	  }
 
-
 	  function presetIcon(selection) {
 	    selection.each(render);
 	  }
 
-
 	  function getIcon(p, geom) {
-	    if (isSmall() && p.isFallback && p.isFallback())
-	      { return 'iD-icon-' + p.id; }
-	    else if (p.icon)
-	      { return p.icon; }
-	    else if (geom === 'line')
-	      { return 'iD-other-line'; }
-	    else if (geom === 'vertex')
-	      { return p.isFallback() ? '' : 'temaki-vertex'; }
-	    else if (isSmall() && geom === 'point')
-	      { return ''; }
-	    else
-	      { return 'maki-marker-stroked'; }
-	  }
-
-
-	  function renderPointBorder(enter) {
+	    if (isSmall() && p.isFallback && p.isFallback()) return 'iD-icon-' + p.id;
+	    if (p.icon) return p.icon;
+	    if (geom === 'line') return 'iD-other-line';
+	    if (geom === 'vertex') return p.isFallback() ? '' : 'temaki-vertex';
+	    if (isSmall() && geom === 'point') return '';
+	    return 'maki-marker-stroked';
+	  }
+
+	  function renderPointBorder(container, drawPoint) {
+	    var pointBorder = container.selectAll('.preset-icon-point-border').data(drawPoint ? [0] : []);
+	    pointBorder.exit().remove();
+	    var pointBorderEnter = pointBorder.enter();
 	    var w = 40;
 	    var h = 40;
-
-	    enter
-	      .append('svg')
-	      .attr('class', 'preset-icon-fill preset-icon-point-border')
-	      .attr('width', w)
-	      .attr('height', h)
-	      .attr('viewBox', ("0 0 " + w + " " + h))
-	      .append('path')
-	      .attr('transform', 'translate(11.5, 8)')
-	      .attr('d', 'M 17,8 C 17,13 11,21 8.5,23.5 C 6,21 0,13 0,8 C 0,4 4,-0.5 8.5,-0.5 C 13,-0.5 17,4 17,8 z');
+	    pointBorderEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-point-border').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h)).append('path').attr('transform', 'translate(11.5, 8)').attr('d', 'M 17,8 C 17,13 11,21 8.5,23.5 C 6,21 0,13 0,8 C 0,4 4,-0.5 8.5,-0.5 C 13,-0.5 17,4 17,8 z');
+	    pointBorder = pointBorderEnter.merge(pointBorder);
 	  }
 
+	  function renderCategoryBorder(container, category) {
+	    var categoryBorder = container.selectAll('.preset-icon-category-border').data(category ? [0] : []);
+	    categoryBorder.exit().remove();
+	    var categoryBorderEnter = categoryBorder.enter();
+	    var d = 60;
+	    var svgEnter = categoryBorderEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-category-border').attr('width', d).attr('height', d).attr('viewBox', "0 0 ".concat(d, " ").concat(d));
+	    ['fill', 'stroke'].forEach(function (klass) {
+	      svgEnter.append('path').attr('class', "area ".concat(klass)).attr('d', 'M9.5,7.5 L25.5,7.5 L28.5,12.5 L49.5,12.5 C51.709139,12.5 53.5,14.290861 53.5,16.5 L53.5,43.5 C53.5,45.709139 51.709139,47.5 49.5,47.5 L10.5,47.5 C8.290861,47.5 6.5,45.709139 6.5,43.5 L6.5,12.5 L9.5,7.5 Z');
+	    });
+	    categoryBorder = categoryBorderEnter.merge(categoryBorder);
+
+	    if (category) {
+	      var tagClasses = svgTagClasses().getClassesString(category.members.collection[0].addTags, '');
+	      categoryBorder.selectAll('path.stroke').attr('class', "area stroke ".concat(tagClasses));
+	      categoryBorder.selectAll('path.fill').attr('class', "area fill ".concat(tagClasses));
+	    }
+	  }
 
-	  function renderCircleFill(fillEnter) {
+	  function renderCircleFill(container, drawVertex) {
+	    var vertexFill = container.selectAll('.preset-icon-fill-vertex').data(drawVertex ? [0] : []);
+	    vertexFill.exit().remove();
+	    var vertexFillEnter = vertexFill.enter();
 	    var w = 60;
 	    var h = 60;
 	    var d = 40;
-
-	    fillEnter
-	      .append('svg')
-	      .attr('class', 'preset-icon-fill preset-icon-fill-vertex')
-	      .attr('width', w)
-	      .attr('height', h)
-	      .attr('viewBox', ("0 0 " + w + " " + h))
-	      .append('circle')
-	      .attr('cx', w / 2)
-	      .attr('cy', h / 2)
-	      .attr('r', d / 2);
+	    vertexFillEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-fill-vertex').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h)).append('circle').attr('cx', w / 2).attr('cy', h / 2).attr('r', d / 2);
+	    vertexFill = vertexFillEnter.merge(vertexFill);
 	  }
 
-
-	  function renderSquareFill(fillEnter) {
+	  function renderSquareFill(container, drawArea, tagClasses) {
+	    var fill = container.selectAll('.preset-icon-fill-area').data(drawArea ? [0] : []);
+	    fill.exit().remove();
+	    var fillEnter = fill.enter();
 	    var d = isSmall() ? 40 : 60;
 	    var w = d;
 	    var h = d;
-	    var l = d * 2/3;
-	    var c1 = (w-l) / 2;
+	    var l = d * 2 / 3;
+	    var c1 = (w - l) / 2;
 	    var c2 = c1 + l;
-
-	    fillEnter = fillEnter
-	      .append('svg')
-	      .attr('class', 'preset-icon-fill preset-icon-fill-area')
-	      .attr('width', w)
-	      .attr('height', h)
-	      .attr('viewBox', ("0 0 " + w + " " + h));
-
+	    fillEnter = fillEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-fill-area').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h));
 	    ['fill', 'stroke'].forEach(function (klass) {
-	      fillEnter
-	        .append('path')
-	        .attr('d', ("M" + c1 + " " + c1 + " L" + c1 + " " + c2 + " L" + c2 + " " + c2 + " L" + c2 + " " + c1 + " Z"))
-	        .attr('class', ("line area " + klass));
+	      fillEnter.append('path').attr('d', "M".concat(c1, " ").concat(c1, " L").concat(c1, " ").concat(c2, " L").concat(c2, " ").concat(c2, " L").concat(c2, " ").concat(c1, " Z")).attr('class', "area ".concat(klass));
 	    });
-
 	    var rVertex = 2.5;
 	    [[c1, c1], [c1, c2], [c2, c2], [c2, c1]].forEach(function (point) {
-	      fillEnter
-	        .append('circle')
-	        .attr('class', 'vertex')
-	        .attr('cx', point[0])
-	        .attr('cy', point[1])
-	        .attr('r', rVertex);
+	      fillEnter.append('circle').attr('class', 'vertex').attr('cx', point[0]).attr('cy', point[1]).attr('r', rVertex);
 	    });
 
 	    if (!isSmall()) {
 	      var rMidpoint = 1.25;
-	      [[c1, w/2], [c2, w/2], [h/2, c1], [h/2, c2]].forEach(function (point) {
-	        fillEnter
-	          .append('circle')
-	          .attr('class', 'midpoint')
-	          .attr('cx', point[0])
-	          .attr('cy', point[1])
-	          .attr('r', rMidpoint);
+	      [[c1, w / 2], [c2, w / 2], [h / 2, c1], [h / 2, c2]].forEach(function (point) {
+	        fillEnter.append('circle').attr('class', 'midpoint').attr('cx', point[0]).attr('cy', point[1]).attr('r', rMidpoint);
 	      });
 	    }
+
+	    fill = fillEnter.merge(fill);
+	    fill.selectAll('path.stroke').attr('class', "area stroke ".concat(tagClasses));
+	    fill.selectAll('path.fill').attr('class', "area fill ".concat(tagClasses));
 	  }
 
+	  function renderLine(container, drawLine, tagClasses) {
+	    var line = container.selectAll('.preset-icon-line').data(drawLine ? [0] : []);
+	    line.exit().remove();
+	    var lineEnter = line.enter();
+	    var d = isSmall() ? 40 : 60; // draw the line parametrically
 
-	  function renderLine(lineEnter) {
-	    var d = isSmall() ? 40 : 60;
-	    // draw the line parametrically
 	    var w = d;
 	    var h = d;
 	    var y = Math.round(d * 0.72);
@@ -82892,35 +78627,24 @@
 	    var r = 2.5;
 	    var x1 = (w - l) / 2;
 	    var x2 = x1 + l;
-
-	    lineEnter = lineEnter
-	      .append('svg')
-	      .attr('class', 'preset-icon-line')
-	      .attr('width', w)
-	      .attr('height', h)
-	      .attr('viewBox', ("0 0 " + w + " " + h));
-
+	    lineEnter = lineEnter.append('svg').attr('class', 'preset-icon-line').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h));
 	    ['casing', 'stroke'].forEach(function (klass) {
-	      lineEnter
-	        .append('path')
-	        .attr('d', ("M" + x1 + " " + y + " L" + x2 + " " + y))
-	        .attr('class', ("line " + klass));
+	      lineEnter.append('path').attr('d', "M".concat(x1, " ").concat(y, " L").concat(x2, " ").concat(y)).attr('class', "line ".concat(klass));
 	    });
-
-	    [[x1-1, y], [x2+1, y]].forEach(function (point) {
-	      lineEnter
-	        .append('circle')
-	        .attr('class', 'vertex')
-	        .attr('cx', point[0])
-	        .attr('cy', point[1])
-	        .attr('r', r);
+	    [[x1 - 1, y], [x2 + 1, y]].forEach(function (point) {
+	      lineEnter.append('circle').attr('class', 'vertex').attr('cx', point[0]).attr('cy', point[1]).attr('r', r);
 	    });
+	    line = lineEnter.merge(line);
+	    line.selectAll('path.stroke').attr('class', "line stroke ".concat(tagClasses));
+	    line.selectAll('path.casing').attr('class', "line casing ".concat(tagClasses));
 	  }
 
+	  function renderRoute(container, drawRoute, p) {
+	    var route = container.selectAll('.preset-icon-route').data(drawRoute ? [0] : []);
+	    route.exit().remove();
+	    var routeEnter = route.enter();
+	    var d = isSmall() ? 40 : 60; // draw the route parametrically
 
-	  function renderRoute(routeEnter) {
-	    var d = isSmall() ? 40 : 60;
-	    // draw the route parametrically
 	    var w = d;
 	    var h = d;
 	    var y1 = Math.round(d * 0.80);
@@ -82931,45 +78655,65 @@
 	    var x2 = x1 + l / 3;
 	    var x3 = x2 + l / 3;
 	    var x4 = x3 + l / 3;
-
-	    routeEnter = routeEnter
-	      .append('svg')
-	      .attr('class', 'preset-icon-route')
-	      .attr('width', w)
-	      .attr('height', h)
-	      .attr('viewBox', ("0 0 " + w + " " + h));
-
+	    routeEnter = routeEnter.append('svg').attr('class', 'preset-icon-route').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h));
 	    ['casing', 'stroke'].forEach(function (klass) {
-	      routeEnter
-	        .append('path')
-	        .attr('d', ("M" + x1 + " " + y1 + " L" + x2 + " " + y2))
-	        .attr('class', ("segment0 line " + klass));
-	      routeEnter
-	        .append('path')
-	        .attr('d', ("M" + x2 + " " + y2 + " L" + x3 + " " + y1))
-	        .attr('class', ("segment1 line " + klass));
-	      routeEnter
-	        .append('path')
-	        .attr('d', ("M" + x3 + " " + y1 + " L" + x4 + " " + y2))
-	        .attr('class', ("segment2 line " + klass));
+	      routeEnter.append('path').attr('d', "M".concat(x1, " ").concat(y1, " L").concat(x2, " ").concat(y2)).attr('class', "segment0 line ".concat(klass));
+	      routeEnter.append('path').attr('d', "M".concat(x2, " ").concat(y2, " L").concat(x3, " ").concat(y1)).attr('class', "segment1 line ".concat(klass));
+	      routeEnter.append('path').attr('d', "M".concat(x3, " ").concat(y1, " L").concat(x4, " ").concat(y2)).attr('class', "segment2 line ".concat(klass));
 	    });
-
 	    [[x1, y1], [x2, y2], [x3, y1], [x4, y2]].forEach(function (point) {
-	      routeEnter
-	        .append('circle')
-	        .attr('class', 'vertex')
-	        .attr('cx', point[0])
-	        .attr('cy', point[1])
-	        .attr('r', r);
+	      routeEnter.append('circle').attr('class', 'vertex').attr('cx', point[0]).attr('cy', point[1]).attr('r', r);
 	    });
-	  }
+	    route = routeEnter.merge(route);
+
+	    if (drawRoute) {
+	      var routeType = p.tags.type === 'waterway' ? 'waterway' : p.tags.route;
+	      var segmentPresetIDs = routeSegments[routeType];
 
+	      for (var i in segmentPresetIDs) {
+	        var segmentPreset = _mainPresetIndex.item(segmentPresetIDs[i]);
+	        var segmentTagClasses = svgTagClasses().getClassesString(segmentPreset.tags, '');
+	        route.selectAll("path.stroke.segment".concat(i)).attr('class', "segment".concat(i, " line stroke ").concat(segmentTagClasses));
+	        route.selectAll("path.casing.segment".concat(i)).attr('class', "segment".concat(i, " line casing ").concat(segmentTagClasses));
+	      }
+	    }
+	  }
 
-	  // Route icons are drawn with a zigzag annotation underneath:
+	  function renderSvgIcon(container, picon, geom, isFramed, category, tagClasses) {
+	    var isMaki = picon && /^maki-/.test(picon);
+	    var isTemaki = picon && /^temaki-/.test(picon);
+	    var isFa = picon && /^fa[srb]-/.test(picon);
+	    var isiDIcon = picon && !(isMaki || isTemaki || isFa);
+	    var icon = container.selectAll('.preset-icon').data(picon ? [0] : []);
+	    icon.exit().remove();
+	    icon = icon.enter().append('div').attr('class', 'preset-icon').call(svgIcon('')).merge(icon);
+	    icon.attr('class', 'preset-icon ' + (geom ? geom + '-geom' : '')).classed('category', category).classed('framed', isFramed).classed('preset-icon-iD', isiDIcon);
+	    icon.selectAll('svg').attr('class', 'icon ' + picon + ' ' + (!isiDIcon && geom !== 'line' ? '' : tagClasses));
+	    var suffix = '';
+
+	    if (isMaki) {
+	      suffix = isSmall() && geom === 'point' ? '-11' : '-15';
+	    }
+
+	    icon.selectAll('use').attr('href', '#' + picon + suffix);
+	  }
+
+	  function renderImageIcon(container, imageURL) {
+	    var imageIcon = container.selectAll('img.image-icon').data(imageURL ? [0] : []);
+	    imageIcon.exit().remove();
+	    imageIcon = imageIcon.enter().append('img').attr('class', 'image-icon').on('load', function () {
+	      return container.classed('showing-img', true);
+	    }).on('error', function () {
+	      return container.classed('showing-img', false);
+	    }).merge(imageIcon);
+	    imageIcon.attr('src', imageURL);
+	  } // Route icons are drawn with a zigzag annotation underneath:
 	  //     o   o
 	  //    / \ /
 	  //   o   o
 	  // This dataset defines the styles that are used to draw the zigzag segments.
+
+
 	  var routeSegments = {
 	    bicycle: ['highway/cycleway', 'highway/cycleway', 'highway/cycleway'],
 	    bus: ['highway/unclassified', 'highway/secondary', 'highway/primary'],
@@ -82981,6 +78725,7 @@
 	    horse: ['highway/bridleway', 'highway/bridleway', 'highway/bridleway'],
 	    light_rail: ['railway/light_rail', 'railway/light_rail', 'railway/light_rail'],
 	    monorail: ['railway/monorail', 'railway/monorail', 'railway/monorail'],
+	    mtb: ['highway/path', 'highway/track', 'highway/bridleway'],
 	    pipeline: ['man_made/pipeline', 'man_made/pipeline', 'man_made/pipeline'],
 	    piste: ['piste/downhill', 'piste/hike', 'piste/nordic'],
 	    power: ['power/line', 'power/line', 'power/line'],
@@ -82991,32 +78736,28 @@
 	    waterway: ['waterway/stream', 'waterway/stream', 'waterway/stream']
 	  };
 
-
 	  function render() {
 	    var p = _preset.apply(this, arguments);
+
 	    var geom = _geometry ? _geometry.apply(this, arguments) : null;
-	    if (geom === 'relation' && p.tags && ((p.tags.type === 'route' && p.tags.route && routeSegments[p.tags.route]) || p.tags.type === 'waterway')) {
+
+	    if (geom === 'relation' && p.tags && (p.tags.type === 'route' && p.tags.route && routeSegments[p.tags.route] || p.tags.type === 'waterway')) {
 	      geom = 'route';
 	    }
 
 	    var showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
 	    var isFallback = isSmall() && p.isFallback && p.isFallback();
-	    var imageURL = (showThirdPartyIcons === 'true') && p.imageURL;
+	    var imageURL = showThirdPartyIcons === 'true' && p.imageURL;
 	    var picon = getIcon(p, geom);
-	    var isMaki = picon && /^maki-/.test(picon);
-	    var isTemaki = picon && /^temaki-/.test(picon);
-	    var isFa = picon && /^fa[srb]-/.test(picon);
-	    var isTnp = picon && /^tnp-/.test(picon);
-	    var isiDIcon = picon && !(isMaki || isTemaki || isFa || isTnp);
 	    var isCategory = !p.setTags;
 	    var drawPoint = picon && geom === 'point' && isSmall() && !isFallback;
 	    var drawVertex = picon !== null && geom === 'vertex' && (!isSmall() || !isFallback);
 	    var drawLine = picon && geom === 'line' && !isFallback && !isCategory;
-	    var drawArea = picon && geom === 'area' && !isFallback;
+	    var drawArea = picon && geom === 'area' && !isFallback && !isCategory;
 	    var drawRoute = picon && geom === 'route';
-	    var isFramed = (drawVertex || drawArea || drawLine || drawRoute);
-
+	    var isFramed = drawVertex || drawArea || drawLine || drawRoute || isCategory;
 	    var tags = !isCategory ? p.setTags({}, geom) : {};
+
 	    for (var k in tags) {
 	      if (tags[k] === '*') {
 	        tags[k] = 'yes';
@@ -83025,35597 +78766,24694 @@
 
 	    var tagClasses = svgTagClasses().getClassesString(tags, '');
 	    var selection = select(this);
+	    var container = selection.selectAll('.preset-icon-container').data([0]);
+	    container = container.enter().append('div').attr('class', "preset-icon-container ".concat(_sizeClass)).merge(container);
+	    container.classed('showing-img', !!imageURL).classed('fallback', isFallback);
+	    renderCategoryBorder(container, isCategory && p);
+	    renderPointBorder(container, drawPoint);
+	    renderCircleFill(container, drawVertex);
+	    renderSquareFill(container, drawArea, tagClasses);
+	    renderLine(container, drawLine, tagClasses);
+	    renderRoute(container, drawRoute, p);
+	    renderSvgIcon(container, picon, geom, isFramed, isCategory, tagClasses);
+	    renderImageIcon(container, imageURL);
+	  }
+
+	  presetIcon.preset = function (val) {
+	    if (!arguments.length) return _preset;
+	    _preset = utilFunctor(val);
+	    return presetIcon;
+	  };
+
+	  presetIcon.geometry = function (val) {
+	    if (!arguments.length) return _geometry;
+	    _geometry = utilFunctor(val);
+	    return presetIcon;
+	  };
 
-	    var container = selection.selectAll('.preset-icon-container')
-	      .data([0]);
+	  presetIcon.sizeClass = function (val) {
+	    if (!arguments.length) return _sizeClass;
+	    _sizeClass = val;
+	    return presetIcon;
+	  };
 
-	    container = container.enter()
-	      .append('div')
-	      .attr('class', ("preset-icon-container " + _sizeClass))
-	      .merge(container);
+	  return presetIcon;
+	}
 
-	    container
-	      .classed('showing-img', !!imageURL)
-	      .classed('fallback', isFallback);
+	function uiSectionFeatureType(context) {
+	  var dispatch = dispatch$8('choose');
+	  var _entityIDs = [];
+	  var _presets = [];
+
+	  var _tagReference;
+
+	  var section = uiSection('feature-type', context).label(_t.html('inspector.feature_type')).disclosureContent(renderDisclosureContent);
+
+	  function renderDisclosureContent(selection) {
+	    selection.classed('preset-list-item', true);
+	    selection.classed('mixed-types', _presets.length > 1);
+	    var presetButtonWrap = selection.selectAll('.preset-list-button-wrap').data([0]).enter().append('div').attr('class', 'preset-list-button-wrap');
+	    var presetButton = presetButtonWrap.append('button').attr('class', 'preset-list-button preset-reset').call(uiTooltip().title(_t.html('inspector.back_tooltip')).placement('bottom'));
+	    presetButton.append('div').attr('class', 'preset-icon-container');
+	    presetButton.append('div').attr('class', 'label').append('div').attr('class', 'label-inner');
+	    presetButtonWrap.append('div').attr('class', 'accessory-buttons');
+	    var tagReferenceBodyWrap = selection.selectAll('.tag-reference-body-wrap').data([0]);
+	    tagReferenceBodyWrap = tagReferenceBodyWrap.enter().append('div').attr('class', 'tag-reference-body-wrap').merge(tagReferenceBodyWrap); // update header
+
+	    if (_tagReference) {
+	      selection.selectAll('.preset-list-button-wrap .accessory-buttons').style('display', _presets.length === 1 ? null : 'none').call(_tagReference.button);
+	      tagReferenceBodyWrap.style('display', _presets.length === 1 ? null : 'none').call(_tagReference.body);
+	    }
+
+	    selection.selectAll('.preset-reset').on('click', function () {
+	      dispatch.call('choose', this, _presets);
+	    }).on('pointerdown pointerup mousedown mouseup', function (d3_event) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation();
+	    });
+	    var geometries = entityGeometries();
+	    selection.select('.preset-list-item button').call(uiPresetIcon().geometry(_presets.length === 1 ? geometries.length === 1 && geometries[0] : null).preset(_presets.length === 1 ? _presets[0] : _mainPresetIndex.item('point')));
+	    var names = _presets.length === 1 ? [_presets[0].nameLabel(), _presets[0].subtitleLabel()].filter(Boolean) : [_t('inspector.multiple_types')];
+	    var label = selection.select('.label-inner');
+	    var nameparts = label.selectAll('.namepart').data(names, function (d) {
+	      return d;
+	    });
+	    nameparts.exit().remove();
+	    nameparts.enter().append('div').attr('class', 'namepart').html(function (d) {
+	      return d;
+	    });
+	  }
 
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return section;
+	  };
 
-	    var pointBorder = container.selectAll('.preset-icon-point-border')
-	      .data(drawPoint ? [0] : []);
+	  section.presets = function (val) {
+	    if (!arguments.length) return _presets; // don't reload the same preset
 
-	    pointBorder.exit()
-	      .remove();
+	    if (!utilArrayIdentical(val, _presets)) {
+	      _presets = val;
 
-	    var pointBorderEnter = pointBorder.enter();
-	    renderPointBorder(pointBorderEnter);
-	    pointBorder = pointBorderEnter.merge(pointBorder);
+	      if (_presets.length === 1) {
+	        _tagReference = uiTagReference(_presets[0].reference()).showing(false);
+	      }
+	    }
 
+	    return section;
+	  };
 
-	    var vertexFill = container.selectAll('.preset-icon-fill-vertex')
-	      .data(drawVertex ? [0] : []);
+	  function entityGeometries() {
+	    var counts = {};
 
-	    vertexFill.exit()
-	      .remove();
+	    for (var i in _entityIDs) {
+	      var geometry = context.graph().geometry(_entityIDs[i]);
+	      if (!counts[geometry]) counts[geometry] = 0;
+	      counts[geometry] += 1;
+	    }
 
-	    var vertexFillEnter = vertexFill.enter();
-	    renderCircleFill(vertexFillEnter);
-	    vertexFill = vertexFillEnter.merge(vertexFill);
+	    return Object.keys(counts).sort(function (geom1, geom2) {
+	      return counts[geom2] - counts[geom1];
+	    });
+	  }
 
+	  return utilRebind(section, dispatch, 'on');
+	}
 
-	    var fill = container.selectAll('.preset-icon-fill-area')
-	      .data(drawArea ? [0] : []);
+	// It borrows some code from uiHelp
 
-	    fill.exit()
-	      .remove();
+	function uiFieldHelp(context, fieldName) {
+	  var fieldHelp = {};
 
-	    var fillEnter = fill.enter();
-	    renderSquareFill(fillEnter);
-	    fill = fillEnter.merge(fill);
+	  var _inspector = select(null);
 
-	    fill.selectAll('path.stroke')
-	      .attr('class', ("area stroke " + tagClasses));
-	    fill.selectAll('path.fill')
-	      .attr('class', ("area fill " + tagClasses));
+	  var _wrap = select(null);
 
+	  var _body = select(null);
 
-	    var line = container.selectAll('.preset-icon-line')
-	      .data(drawLine ? [0] : []);
+	  var fieldHelpKeys = {
+	    restrictions: [['about', ['about', 'from_via_to', 'maxdist', 'maxvia']], ['inspecting', ['about', 'from_shadow', 'allow_shadow', 'restrict_shadow', 'only_shadow', 'restricted', 'only']], ['modifying', ['about', 'indicators', 'allow_turn', 'restrict_turn', 'only_turn']], ['tips', ['simple', 'simple_example', 'indirect', 'indirect_example', 'indirect_noedit']]]
+	  };
+	  var fieldHelpHeadings = {};
+	  var replacements = {
+	    distField: _t.html('restriction.controls.distance'),
+	    viaField: _t.html('restriction.controls.via'),
+	    fromShadow: icon('#iD-turn-shadow', 'inline shadow from'),
+	    allowShadow: icon('#iD-turn-shadow', 'inline shadow allow'),
+	    restrictShadow: icon('#iD-turn-shadow', 'inline shadow restrict'),
+	    onlyShadow: icon('#iD-turn-shadow', 'inline shadow only'),
+	    allowTurn: icon('#iD-turn-yes', 'inline turn'),
+	    restrictTurn: icon('#iD-turn-no', 'inline turn'),
+	    onlyTurn: icon('#iD-turn-only', 'inline turn')
+	  }; // For each section, squash all the texts into a single markdown document
 
-	    line.exit()
-	      .remove();
+	  var docs = fieldHelpKeys[fieldName].map(function (key) {
+	    var helpkey = 'help.field.' + fieldName + '.' + key[0];
+	    var text = key[1].reduce(function (all, part) {
+	      var subkey = helpkey + '.' + part;
+	      var depth = fieldHelpHeadings[subkey]; // is this subkey a heading?
 
-	    var lineEnter = line.enter();
-	    renderLine(lineEnter);
-	    line = lineEnter.merge(line);
+	      var hhh = depth ? Array(depth + 1).join('#') + ' ' : ''; // if so, prepend with some ##'s
 
-	    line.selectAll('path.stroke')
-	      .attr('class', ("line stroke " + tagClasses));
-	    line.selectAll('path.casing')
-	      .attr('class', ("line casing " + tagClasses));
+	      return all + hhh + _t.html(subkey, replacements) + '\n\n';
+	    }, '');
+	    return {
+	      key: helpkey,
+	      title: _t.html(helpkey + '.title'),
+	      html: marked_1(text.trim())
+	    };
+	  });
 
+	  function show() {
+	    updatePosition();
 
-	    var route = container.selectAll('.preset-icon-route')
-	      .data(drawRoute ? [0] : []);
+	    _body.classed('hide', false).style('opacity', '0').transition().duration(200).style('opacity', '1');
+	  }
 
-	    route.exit()
-	      .remove();
+	  function hide() {
+	    _body.classed('hide', true).transition().duration(200).style('opacity', '0').on('end', function () {
+	      _body.classed('hide', true);
+	    });
+	  }
 
-	    var routeEnter = route.enter();
-	    renderRoute(routeEnter);
-	    route = routeEnter.merge(route);
+	  function clickHelp(index) {
+	    var d = docs[index];
+	    var tkeys = fieldHelpKeys[fieldName][index][1];
 
-	    if (drawRoute) {
-	      var routeType = p.tags.type === 'waterway' ? 'waterway' : p.tags.route;
-	      var segmentPresetIDs = routeSegments[routeType];
-	      for (var i in segmentPresetIDs) {
-	        var segmentPreset = _mainPresetIndex.item(segmentPresetIDs[i]);
-	        var segmentTagClasses = svgTagClasses().getClassesString(segmentPreset.tags, '');
-	        route.selectAll(("path.stroke.segment" + i))
-	          .attr('class', ("segment" + i + " line stroke " + segmentTagClasses));
-	        route.selectAll(("path.casing.segment" + i))
-	          .attr('class', ("segment" + i + " line casing " + segmentTagClasses));
-	      }
-	    }
+	    _body.selectAll('.field-help-nav-item').classed('active', function (d, i) {
+	      return i === index;
+	    });
 
+	    var content = _body.selectAll('.field-help-content').html(d.html); // class the paragraphs so we can find and style them
 
-	    var icon = container.selectAll('.preset-icon')
-	      .data(picon ? [0] : []);
 
-	    icon.exit()
-	      .remove();
+	    content.selectAll('p').attr('class', function (d, i) {
+	      return tkeys[i];
+	    }); // insert special content for certain help sections
 
-	    icon = icon.enter()
-	      .append('div')
-	      .attr('class', 'preset-icon')
-	      .call(svgIcon(''))
-	      .merge(icon);
+	    if (d.key === 'help.field.restrictions.inspecting') {
+	      content.insert('img', 'p.from_shadow').attr('class', 'field-help-image cf').attr('src', context.imagePath('tr_inspect.gif'));
+	    } else if (d.key === 'help.field.restrictions.modifying') {
+	      content.insert('img', 'p.allow_turn').attr('class', 'field-help-image cf').attr('src', context.imagePath('tr_modify.gif'));
+	    }
+	  }
 
-	    icon
-	      .attr('class', 'preset-icon ' + (geom ? geom + '-geom' : ''))
-	      .classed('framed', isFramed)
-	      .classed('preset-icon-iD', isiDIcon);
+	  fieldHelp.button = function (selection) {
+	    if (_body.empty()) return;
+	    var button = selection.selectAll('.field-help-button').data([0]); // enter/update
 
-	    icon.selectAll('svg')
-	      .attr('class', 'icon ' + picon + ' ' + (!isiDIcon && geom !== 'line'  ? '' : tagClasses));
+	    button.enter().append('button').attr('class', 'field-help-button').call(svgIcon('#iD-icon-help')).merge(button).on('click', function (d3_event) {
+	      d3_event.stopPropagation();
+	      d3_event.preventDefault();
 
-	    icon.selectAll('use')
-	      .attr('href', '#' + picon + (isMaki ? (isSmall() && geom === 'point' ? '-11' : '-15') : ''));
+	      if (_body.classed('hide')) {
+	        show();
+	      } else {
+	        hide();
+	      }
+	    });
+	  };
 
-	    var imageIcon = container.selectAll('img.image-icon')
-	      .data(imageURL ? [0] : []);
+	  function updatePosition() {
+	    var wrap = _wrap.node();
 
-	    imageIcon.exit()
-	      .remove();
+	    var inspector = _inspector.node();
 
-	    imageIcon = imageIcon.enter()
-	      .append('img')
-	      .attr('class', 'image-icon')
-	      .on('load', function () { return container.classed('showing-img', true); } )
-	      .on('error', function () { return container.classed('showing-img', false); } )
-	      .merge(imageIcon);
+	    var wRect = wrap.getBoundingClientRect();
+	    var iRect = inspector.getBoundingClientRect();
 
-	    imageIcon
-	      .attr('src', imageURL);
+	    _body.style('top', wRect.top + inspector.scrollTop - iRect.top + 'px');
 	  }
 
+	  fieldHelp.body = function (selection) {
+	    // This control expects the field to have a form-field-input-wrap div
+	    _wrap = selection.selectAll('.form-field-input-wrap');
+	    if (_wrap.empty()) return; // absolute position relative to the inspector, so it "floats" above the fields
 
-	  presetIcon.preset = function(val) {
-	    if (!arguments.length) { return _preset; }
-	    _preset = utilFunctor(val);
-	    return presetIcon;
-	  };
+	    _inspector = context.container().select('.sidebar .entity-editor-pane .inspector-body');
+	    if (_inspector.empty()) return;
+	    _body = _inspector.selectAll('.field-help-body').data([0]);
 
+	    var enter = _body.enter().append('div').attr('class', 'field-help-body hide'); // initially hidden
 
-	  presetIcon.geometry = function(val) {
-	    if (!arguments.length) { return _geometry; }
-	    _geometry = utilFunctor(val);
-	    return presetIcon;
+
+	    var titleEnter = enter.append('div').attr('class', 'field-help-title cf');
+	    titleEnter.append('h2').attr('class', _mainLocalizer.textDirection() === 'rtl' ? 'fr' : 'fl').html(_t.html('help.field.' + fieldName + '.title'));
+	    titleEnter.append('button').attr('class', 'fr close').on('click', function (d3_event) {
+	      d3_event.stopPropagation();
+	      d3_event.preventDefault();
+	      hide();
+	    }).call(svgIcon('#iD-icon-close'));
+	    var navEnter = enter.append('div').attr('class', 'field-help-nav cf');
+	    var titles = docs.map(function (d) {
+	      return d.title;
+	    });
+	    navEnter.selectAll('.field-help-nav-item').data(titles).enter().append('div').attr('class', 'field-help-nav-item').html(function (d) {
+	      return d;
+	    }).on('click', function (d3_event, d) {
+	      d3_event.stopPropagation();
+	      d3_event.preventDefault();
+	      clickHelp(titles.indexOf(d));
+	    });
+	    enter.append('div').attr('class', 'field-help-content');
+	    _body = _body.merge(enter);
+	    clickHelp(0);
 	  };
 
+	  return fieldHelp;
+	}
 
-	  presetIcon.sizeClass = function(val) {
-	    if (!arguments.length) { return _sizeClass; }
-	    _sizeClass = val;
-	    return presetIcon;
+	function uiFieldCheck(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var options = field.options;
+	  var values = [];
+	  var texts = [];
+
+	  var _tags;
+
+	  var input = select(null);
+	  var text = select(null);
+	  var label = select(null);
+	  var reverser = select(null);
+
+	  var _impliedYes;
+
+	  var _entityIDs = [];
+
+	  var _value;
+
+	  if (options) {
+	    for (var i in options) {
+	      var v = options[i];
+	      values.push(v === 'undefined' ? undefined : v);
+	      texts.push(field.t.html('options.' + v, {
+	        'default': v
+	      }));
+	    }
+	  } else {
+	    values = [undefined, 'yes'];
+	    texts = [_t.html('inspector.unknown'), _t.html('inspector.check.yes')];
+
+	    if (field.type !== 'defaultCheck') {
+	      values.push('no');
+	      texts.push(_t.html('inspector.check.no'));
+	    }
+	  } // Checks tags to see whether an undefined value is "Assumed to be Yes"
+
+
+	  function checkImpliedYes() {
+	    _impliedYes = field.id === 'oneway_yes'; // hack: pretend `oneway` field is a `oneway_yes` field
+	    // where implied oneway tag exists (e.g. `junction=roundabout`) #2220, #1841
+
+	    if (field.id === 'oneway') {
+	      var entity = context.entity(_entityIDs[0]);
+
+	      for (var key in entity.tags) {
+	        if (key in osmOneWayTags && entity.tags[key] in osmOneWayTags[key]) {
+	          _impliedYes = true;
+	          texts[0] = _t.html('_tagging.presets.fields.oneway_yes.options.undefined');
+	          break;
+	        }
+	      }
+	    }
+	  }
+
+	  function reverserHidden() {
+	    if (!context.container().select('div.inspector-hover').empty()) return true;
+	    return !(_value === 'yes' || _impliedYes && !_value);
+	  }
+
+	  function reverserSetText(selection) {
+	    var entity = _entityIDs.length && context.hasEntity(_entityIDs[0]);
+	    if (reverserHidden() || !entity) return selection;
+	    var first = entity.first();
+	    var last = entity.isClosed() ? entity.nodes[entity.nodes.length - 2] : entity.last();
+	    var pseudoDirection = first < last;
+	    var icon = pseudoDirection ? '#iD-icon-forward' : '#iD-icon-backward';
+	    selection.selectAll('.reverser-span').html(_t.html('inspector.check.reverser')).call(svgIcon(icon, 'inline'));
+	    return selection;
+	  }
+
+	  var check = function check(selection) {
+	    checkImpliedYes();
+	    label = selection.selectAll('.form-field-input-wrap').data([0]);
+	    var enter = label.enter().append('label').attr('class', 'form-field-input-wrap form-field-input-check');
+	    enter.append('input').property('indeterminate', field.type !== 'defaultCheck').attr('type', 'checkbox').attr('id', field.domId);
+	    enter.append('span').html(texts[0]).attr('class', 'value');
+
+	    if (field.type === 'onewayCheck') {
+	      enter.append('button').attr('class', 'reverser' + (reverserHidden() ? ' hide' : '')).append('span').attr('class', 'reverser-span');
+	    }
+
+	    label = label.merge(enter);
+	    input = label.selectAll('input');
+	    text = label.selectAll('span.value');
+	    input.on('click', function (d3_event) {
+	      d3_event.stopPropagation();
+	      var t = {};
+
+	      if (Array.isArray(_tags[field.key])) {
+	        if (values.indexOf('yes') !== -1) {
+	          t[field.key] = 'yes';
+	        } else {
+	          t[field.key] = values[0];
+	        }
+	      } else {
+	        t[field.key] = values[(values.indexOf(_value) + 1) % values.length];
+	      } // Don't cycle through `alternating` or `reversible` states - #4970
+	      // (They are supported as translated strings, but should not toggle with clicks)
+
+
+	      if (t[field.key] === 'reversible' || t[field.key] === 'alternating') {
+	        t[field.key] = values[0];
+	      }
+
+	      dispatch.call('change', this, t);
+	    });
+
+	    if (field.type === 'onewayCheck') {
+	      reverser = label.selectAll('.reverser');
+	      reverser.call(reverserSetText).on('click', function (d3_event) {
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation();
+	        context.perform(function (graph) {
+	          for (var i in _entityIDs) {
+	            graph = actionReverse(_entityIDs[i])(graph);
+	          }
+
+	          return graph;
+	        }, _t('operations.reverse.annotation.line', {
+	          n: 1
+	        })); // must manually revalidate since no 'change' event was called
+
+	        context.validator().validate();
+	        select(this).call(reverserSetText);
+	      });
+	    }
 	  };
 
-	  return presetIcon;
-	}
+	  check.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return check;
+	  };
 
-	function uiSectionFeatureType(context) {
+	  check.tags = function (tags) {
+	    _tags = tags;
 
-	    var dispatch$1 = dispatch('choose');
+	    function isChecked(val) {
+	      return val !== 'no' && val !== '' && val !== undefined && val !== null;
+	    }
 
-	    var _entityIDs = [];
-	    var _presets = [];
+	    function textFor(val) {
+	      if (val === '') val = undefined;
+	      var index = values.indexOf(val);
+	      return index !== -1 ? texts[index] : '"' + val + '"';
+	    }
 
-	    var _tagReference;
+	    checkImpliedYes();
+	    var isMixed = Array.isArray(tags[field.key]);
+	    _value = !isMixed && tags[field.key] && tags[field.key].toLowerCase();
 
-	    var section = uiSection('feature-type', context)
-	        .title(_t('inspector.feature_type'))
-	        .disclosureContent(renderDisclosureContent);
+	    if (field.type === 'onewayCheck' && (_value === '1' || _value === '-1')) {
+	      _value = 'yes';
+	    }
 
-	    function renderDisclosureContent(selection) {
+	    input.property('indeterminate', isMixed || field.type !== 'defaultCheck' && !_value).property('checked', isChecked(_value));
+	    text.html(isMixed ? _t.html('inspector.multiple_values') : textFor(_value)).classed('mixed', isMixed);
+	    label.classed('set', !!_value);
 
-	        selection.classed('preset-list-item', true);
-	        selection.classed('mixed-types', _presets.length > 1);
+	    if (field.type === 'onewayCheck') {
+	      reverser.classed('hide', reverserHidden()).call(reverserSetText);
+	    }
+	  };
 
-	        var presetButtonWrap = selection
-	            .selectAll('.preset-list-button-wrap')
-	            .data([0])
-	            .enter()
-	            .append('div')
-	            .attr('class', 'preset-list-button-wrap');
+	  check.focus = function () {
+	    input.node().focus();
+	  };
 
-	        var presetButton = presetButtonWrap
-	            .append('button')
-	            .attr('class', 'preset-list-button preset-reset')
-	            .call(uiTooltip()
-	                .title(_t('inspector.back_tooltip'))
-	                .placement('bottom')
-	            );
+	  return utilRebind(check, dispatch, 'on');
+	}
 
-	        presetButton.append('div')
-	            .attr('class', 'preset-icon-container');
+	function uiFieldCombo(field, context) {
+	  var dispatch = dispatch$8('change');
 
-	        presetButton
-	            .append('div')
-	            .attr('class', 'label')
-	            .append('div')
-	            .attr('class', 'label-inner');
+	  var _isMulti = field.type === 'multiCombo' || field.type === 'manyCombo';
 
-	        presetButtonWrap.append('div')
-	            .attr('class', 'accessory-buttons');
+	  var _isNetwork = field.type === 'networkCombo';
 
-	        var tagReferenceBodyWrap = selection
-	            .selectAll('.tag-reference-body-wrap')
-	            .data([0]);
+	  var _isSemi = field.type === 'semiCombo';
 
-	        tagReferenceBodyWrap = tagReferenceBodyWrap
-	            .enter()
-	            .append('div')
-	            .attr('class', 'tag-reference-body-wrap')
-	            .merge(tagReferenceBodyWrap);
-
-	        // update header
-	        if (_tagReference) {
-	            selection.selectAll('.preset-list-button-wrap .accessory-buttons')
-	                .style('display', _presets.length === 1 ? null : 'none')
-	                .call(_tagReference.button);
-
-	            tagReferenceBodyWrap
-	                .style('display', _presets.length === 1 ? null : 'none')
-	                .call(_tagReference.body);
-	        }
-
-	        selection.selectAll('.preset-reset')
-	            .on('click', function() {
-	                 dispatch$1.call('choose', this, _presets);
-	            })
-	            .on('pointerdown pointerup mousedown mouseup', function() {
-	                event.preventDefault();
-	                event.stopPropagation();
-	            });
+	  var _optarray = field.options;
+
+	  var _showTagInfoSuggestions = field.type !== 'manyCombo' && field.autoSuggestions !== false;
+
+	  var _allowCustomValues = field.type !== 'manyCombo' && field.customValues !== false;
+
+	  var _snake_case = field.snake_case || field.snake_case === undefined;
+
+	  var _combobox = uiCombobox(context, 'combo-' + field.safeid).caseSensitive(field.caseSensitive).minItems(_isMulti || _isSemi ? 1 : 2);
+
+	  var _container = select(null);
+
+	  var _inputWrap = select(null);
+
+	  var _input = select(null);
 
-	        var geometries = entityGeometries();
-	        selection.select('.preset-list-item button')
-	            .call(uiPresetIcon()
-	                .geometry(_presets.length === 1 ? (geometries.length === 1 && geometries[0]) : null)
-	                .preset(_presets.length === 1 ? _presets[0] : _mainPresetIndex.item('point'))
-	            );
+	  var _comboData = [];
+	  var _multiData = [];
+	  var _entityIDs = [];
 
-	        // NOTE: split on en-dash, not a hyphen (to avoid conflict with hyphenated names)
-	        var names = _presets.length === 1 ? _presets[0].name().split(' – ') : [_t('inspector.multiple_types')];
+	  var _tags;
 
-	        var label = selection.select('.label-inner');
-	        var nameparts = label.selectAll('.namepart')
-	            .data(names, function(d) { return d; });
+	  var _countryCode;
 
-	        nameparts.exit()
-	            .remove();
+	  var _staticPlaceholder; // initialize deprecated tags array
 
-	        nameparts
-	            .enter()
-	            .append('div')
-	            .attr('class', 'namepart')
-	            .text(function(d) { return d; });
-	    }
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return section;
-	    };
+	  var _dataDeprecated = [];
+	  _mainFileFetcher.get('deprecated').then(function (d) {
+	    _dataDeprecated = d;
+	  })["catch"](function () {
+	    /* ignore */
+	  }); // ensure multiCombo field.key ends with a ':'
 
-	    section.presets = function(val) {
-	        if (!arguments.length) { return _presets; }
+	  if (_isMulti && field.key && /[^:]$/.test(field.key)) {
+	    field.key += ':';
+	  }
 
-	        // don't reload the same preset
-	        if (!utilArrayIdentical(val, _presets)) {
-	            _presets = val;
+	  function snake(s) {
+	    return s.replace(/\s+/g, '_').toLowerCase();
+	  }
 
-	            if (_presets.length === 1) {
-	                _tagReference = uiTagReference(_presets[0].reference())
-	                    .showing(false);
-	            }
-	        }
+	  function clean(s) {
+	    return s.split(';').map(function (s) {
+	      return s.trim();
+	    }).join(';');
+	  } // returns the tag value for a display value
+	  // (for multiCombo, dval should be the key suffix, not the entire key)
 
-	        return section;
-	    };
 
-	    function entityGeometries() {
+	  function tagValue(dval) {
+	    dval = clean(dval || '');
 
-	        var counts = {};
+	    var found = _comboData.find(function (o) {
+	      return o.key && clean(o.value) === dval;
+	    });
 
-	        for (var i in _entityIDs) {
-	            var geometry = context.graph().geometry(_entityIDs[i]);
-	            if (!counts[geometry]) { counts[geometry] = 0; }
-	            counts[geometry] += 1;
-	        }
+	    if (found) return found.key;
 
-	        return Object.keys(counts).sort(function(geom1, geom2) {
-	            return counts[geom2] - counts[geom1];
-	        });
+	    if (field.type === 'typeCombo' && !dval) {
+	      return 'yes';
 	    }
 
-	    return utilRebind(section, dispatch$1, 'on');
-	}
+	    return (_snake_case ? snake(dval) : dval) || undefined;
+	  } // returns the display value for a tag value
+	  // (for multiCombo, tval should be the key suffix, not the entire key)
 
-	// This currently only works with the 'restrictions' field
-	// It borrows some code from uiHelp
 
-	function uiFieldHelp(context, fieldName) {
-	    var fieldHelp = {};
-	    var _inspector = select(null);
-	    var _wrap = select(null);
-	    var _body = select(null);
-
-	    var fieldHelpKeys = {
-	        restrictions: [
-	            ['about',[
-	                'about',
-	                'from_via_to',
-	                'maxdist',
-	                'maxvia'
-	            ]],
-	            ['inspecting',[
-	                'about',
-	                'from_shadow',
-	                'allow_shadow',
-	                'restrict_shadow',
-	                'only_shadow',
-	                'restricted',
-	                'only'
-	            ]],
-	            ['modifying',[
-	                'about',
-	                'indicators',
-	                'allow_turn',
-	                'restrict_turn',
-	                'only_turn'
-	            ]],
-	            ['tips',[
-	                'simple',
-	                'simple_example',
-	                'indirect',
-	                'indirect_example',
-	                'indirect_noedit'
-	            ]]
-	        ]
-	    };
+	  function displayValue(tval) {
+	    tval = tval || '';
 
-	    var fieldHelpHeadings = {};
+	    if (field.hasTextForStringId('options.' + tval)) {
+	      return field.t('options.' + tval, {
+	        "default": tval
+	      });
+	    }
 
-	    var replacements = {
-	        distField: _t('restriction.controls.distance'),
-	        viaField: _t('restriction.controls.via'),
-	        fromShadow: icon('#iD-turn-shadow', 'pre-text shadow from'),
-	        allowShadow: icon('#iD-turn-shadow', 'pre-text shadow allow'),
-	        restrictShadow: icon('#iD-turn-shadow', 'pre-text shadow restrict'),
-	        onlyShadow: icon('#iD-turn-shadow', 'pre-text shadow only'),
-	        allowTurn: icon('#iD-turn-yes', 'pre-text turn'),
-	        restrictTurn: icon('#iD-turn-no', 'pre-text turn'),
-	        onlyTurn: icon('#iD-turn-only', 'pre-text turn')
-	    };
+	    if (field.type === 'typeCombo' && tval.toLowerCase() === 'yes') {
+	      return '';
+	    }
 
+	    return tval;
+	  } // Compute the difference between arrays of objects by `value` property
+	  //
+	  // objectDifference([{value:1}, {value:2}, {value:3}], [{value:2}])
+	  // > [{value:1}, {value:3}]
+	  //
 
-	    // For each section, squash all the texts into a single markdown document
-	    var docs = fieldHelpKeys[fieldName].map(function(key) {
-	        var helpkey = 'help.field.' + fieldName + '.' + key[0];
-	        var text = key[1].reduce(function(all, part) {
-	            var subkey = helpkey + '.' + part;
-	            var depth = fieldHelpHeadings[subkey];                     // is this subkey a heading?
-	            var hhh = depth ? Array(depth + 1).join('#') + ' ' : '';   // if so, prepend with some ##'s
-	            return all + hhh + _t(subkey, replacements) + '\n\n';
-	        }, '');
 
-	        return {
-	            key: helpkey,
-	            title: _t(helpkey + '.title'),
-	            html: marked_1(text.trim())
-	        };
+	  function objectDifference(a, b) {
+	    return a.filter(function (d1) {
+	      return !b.some(function (d2) {
+	        return !d2.isMixed && d1.value === d2.value;
+	      });
 	    });
+	  }
 
-
-	    function show() {
-	        updatePosition();
-
-	        _body
-	            .classed('hide', false)
-	            .style('opacity', '0')
-	            .transition()
-	            .duration(200)
-	            .style('opacity', '1');
+	  function initCombo(selection, attachTo) {
+	    if (!_allowCustomValues) {
+	      selection.attr('readonly', 'readonly');
 	    }
 
-
-	    function hide() {
-	        _body
-	            .classed('hide', true)
-	            .transition()
-	            .duration(200)
-	            .style('opacity', '0')
-	            .on('end', function () {
-	                _body.classed('hide', true);
-	            });
+	    if (_showTagInfoSuggestions && services.taginfo) {
+	      selection.call(_combobox.fetcher(setTaginfoValues), attachTo);
+	      setTaginfoValues('', setPlaceholder);
+	    } else {
+	      selection.call(_combobox, attachTo);
+	      setStaticValues(setPlaceholder);
 	    }
+	  }
 
+	  function setStaticValues(callback) {
+	    if (!_optarray) return;
+	    _comboData = _optarray.map(function (v) {
+	      return {
+	        key: v,
+	        value: field.t('options.' + v, {
+	          "default": v
+	        }),
+	        title: v,
+	        display: field.t.html('options.' + v, {
+	          "default": v
+	        }),
+	        klass: field.hasTextForStringId('options.' + v) ? '' : 'raw-option'
+	      };
+	    });
 
-	    function clickHelp(index) {
-	        var d = docs[index];
-	        var tkeys = fieldHelpKeys[fieldName][index][1];
+	    _combobox.data(objectDifference(_comboData, _multiData));
 
-	        _body.selectAll('.field-help-nav-item')
-	            .classed('active', function(d, i) { return i === index; });
+	    if (callback) callback(_comboData);
+	  }
 
-	        var content = _body.selectAll('.field-help-content')
-	            .html(d.html);
+	  function setTaginfoValues(q, callback) {
+	    var fn = _isMulti ? 'multikeys' : 'values';
+	    var query = (_isMulti ? field.key : '') + q;
+	    var hasCountryPrefix = _isNetwork && _countryCode && _countryCode.indexOf(q.toLowerCase()) === 0;
 
-	        // class the paragraphs so we can find and style them
-	        content.selectAll('p')
-	            .attr('class', function(d, i) { return tkeys[i]; });
+	    if (hasCountryPrefix) {
+	      query = _countryCode + ':';
+	    }
 
-	        // insert special content for certain help sections
-	        if (d.key === 'help.field.restrictions.inspecting') {
-	            content
-	                .insert('img', 'p.from_shadow')
-	                .attr('class', 'field-help-image cf')
-	                .attr('src', context.imagePath('tr_inspect.gif'));
+	    var params = {
+	      debounce: q !== '',
+	      key: field.key,
+	      query: query
+	    };
 
-	        } else if (d.key === 'help.field.restrictions.modifying') {
-	            content
-	                .insert('img', 'p.allow_turn')
-	                .attr('class', 'field-help-image cf')
-	                .attr('src', context.imagePath('tr_modify.gif'));
-	        }
+	    if (_entityIDs.length) {
+	      params.geometry = context.graph().geometry(_entityIDs[0]);
 	    }
 
+	    services.taginfo[fn](params, function (err, data) {
+	      if (err) return;
+	      data = data.filter(function (d) {
+	        if (field.type === 'typeCombo' && d.value === 'yes') {
+	          // don't show the fallback value
+	          return false;
+	        } // don't show values with very low usage
+
 
-	    fieldHelp.button = function(selection) {
-	        if (_body.empty()) { return; }
+	        return !d.count || d.count > 10;
+	      });
+	      var deprecatedValues = osmEntity.deprecatedTagValuesByKey(_dataDeprecated)[field.key];
 
-	        var button = selection.selectAll('.field-help-button')
-	            .data([0]);
+	      if (deprecatedValues) {
+	        // don't suggest deprecated tag values
+	        data = data.filter(function (d) {
+	          return deprecatedValues.indexOf(d.value) === -1;
+	        });
+	      }
 
-	        // enter/update
-	        button.enter()
-	            .append('button')
-	            .attr('class', 'field-help-button')
-	            .attr('tabindex', -1)
-	            .call(svgIcon('#iD-icon-help'))
-	            .merge(button)
-	            .on('click', function () {
-	                event.stopPropagation();
-	                event.preventDefault();
-	                if (_body.classed('hide')) {
-	                    show();
-	                } else {
-	                    hide();
-	                }
-	            });
-	    };
+	      if (hasCountryPrefix) {
+	        data = data.filter(function (d) {
+	          return d.value.toLowerCase().indexOf(_countryCode + ':') === 0;
+	        });
+	      } // hide the caret if there are no suggestions
 
 
-	    function updatePosition() {
-	        var wrap = _wrap.node();
-	        var inspector = _inspector.node();
-	        var wRect = wrap.getBoundingClientRect();
-	        var iRect = inspector.getBoundingClientRect();
+	      _container.classed('empty-combobox', data.length === 0);
 
-	        _body
-	            .style('top', wRect.top + inspector.scrollTop - iRect.top + 'px');
+	      _comboData = data.map(function (d) {
+	        var k = d.value;
+	        if (_isMulti) k = k.replace(field.key, '');
+	        var label = field.t('options.' + k, {
+	          "default": k
+	        });
+	        return {
+	          key: k,
+	          value: label,
+	          display: field.t.html('options.' + k, {
+	            "default": k
+	          }),
+	          title: d.title || label,
+	          klass: field.hasTextForStringId('options.' + k) ? '' : 'raw-option'
+	        };
+	      });
+	      _comboData = objectDifference(_comboData, _multiData);
+	      if (callback) callback(_comboData);
+	    });
+	  }
+
+	  function setPlaceholder(values) {
+	    if (_isMulti || _isSemi) {
+	      _staticPlaceholder = field.placeholder() || _t('inspector.add');
+	    } else {
+	      var vals = values.map(function (d) {
+	        return d.value;
+	      }).filter(function (s) {
+	        return s.length < 20;
+	      });
+	      var placeholders = vals.length > 1 ? vals : values.map(function (d) {
+	        return d.key;
+	      });
+	      _staticPlaceholder = field.placeholder() || placeholders.slice(0, 3).join(', ');
 	    }
 
+	    if (!/(…|\.\.\.)$/.test(_staticPlaceholder)) {
+	      _staticPlaceholder += '…';
+	    }
 
-	    fieldHelp.body = function(selection) {
-	        // This control expects the field to have a form-field-input-wrap div
-	        _wrap = selection.selectAll('.form-field-input-wrap');
-	        if (_wrap.empty()) { return; }
+	    var ph;
 
-	        // absolute position relative to the inspector, so it "floats" above the fields
-	        _inspector = context.container().select('.sidebar .entity-editor-pane .inspector-body');
-	        if (_inspector.empty()) { return; }
+	    if (!_isMulti && !_isSemi && _tags && Array.isArray(_tags[field.key])) {
+	      ph = _t('inspector.multiple_values');
+	    } else {
+	      ph = _staticPlaceholder;
+	    }
 
-	        _body = _inspector.selectAll('.field-help-body')
-	            .data([0]);
+	    _container.selectAll('input').attr('placeholder', ph);
+	  }
 
-	        var enter = _body.enter()
-	            .append('div')
-	            .attr('class', 'field-help-body hide');   // initially hidden
+	  function change() {
+	    var t = {};
+	    var val;
 
-	        var titleEnter = enter
-	            .append('div')
-	            .attr('class', 'field-help-title cf');
-
-	        titleEnter
-	            .append('h2')
-	            .attr('class', ((_mainLocalizer.textDirection() === 'rtl') ? 'fr' : 'fl'))
-	            .text(_t('help.field.' + fieldName + '.title'));
-
-	        titleEnter
-	            .append('button')
-	            .attr('class', 'fr close')
-	            .on('click', function() {
-	                event.stopPropagation();
-	                event.preventDefault();
-	                hide();
-	            })
-	            .call(svgIcon('#iD-icon-close'));
-
-	        var navEnter = enter
-	            .append('div')
-	            .attr('class', 'field-help-nav cf');
+	    if (_isMulti || _isSemi) {
+	      val = tagValue(utilGetSetValue(_input).replace(/,/g, ';')) || '';
 
-	        var titles = docs.map(function(d) { return d.title; });
-	        navEnter.selectAll('.field-help-nav-item')
-	            .data(titles)
-	            .enter()
-	            .append('div')
-	            .attr('class', 'field-help-nav-item')
-	            .text(function(d) { return d; })
-	            .on('click', function(d, i) {
-	                event.stopPropagation();
-	                event.preventDefault();
-	                clickHelp(i);
-	            });
+	      _container.classed('active', false);
 
-	        enter
-	            .append('div')
-	            .attr('class', 'field-help-content');
+	      utilGetSetValue(_input, '');
+	      var vals = val.split(';').filter(Boolean);
+	      if (!vals.length) return;
 
-	        _body = _body
-	            .merge(enter);
+	      if (_isMulti) {
+	        utilArrayUniq(vals).forEach(function (v) {
+	          var key = (field.key || '') + v;
 
-	        clickHelp(0);
-	    };
+	          if (_tags) {
+	            // don't set a multicombo value to 'yes' if it already has a non-'no' value
+	            // e.g. `language:de=main`
+	            var old = _tags[key];
+	            if (typeof old === 'string' && old.toLowerCase() !== 'no') return;
+	          }
 
+	          key = context.cleanTagKey(key);
+	          field.keys.push(key);
+	          t[key] = 'yes';
+	        });
+	      } else if (_isSemi) {
+	        var arr = _multiData.map(function (d) {
+	          return d.key;
+	        });
 
-	    return fieldHelp;
-	}
+	        arr = arr.concat(vals);
+	        t[field.key] = context.cleanTagValue(utilArrayUniq(arr).filter(Boolean).join(';'));
+	      }
 
-	function uiFieldCheck(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var options = field.strings && field.strings.options;
-	    var values = [];
-	    var texts = [];
+	      window.setTimeout(function () {
+	        _input.node().focus();
+	      }, 10);
+	    } else {
+	      var rawValue = utilGetSetValue(_input); // don't override multiple values with blank string
 
-	    var _tags;
+	      if (!rawValue && Array.isArray(_tags[field.key])) return;
+	      val = context.cleanTagValue(tagValue(rawValue));
+	      t[field.key] = val || undefined;
+	    }
 
-	    var input = select(null);
-	    var text = select(null);
-	    var label = select(null);
-	    var reverser = select(null);
+	    dispatch.call('change', this, t);
+	  }
 
-	    var _impliedYes;
-	    var _entityIDs = [];
-	    var _value;
+	  function removeMultikey(d3_event, d) {
+	    d3_event.preventDefault();
+	    d3_event.stopPropagation();
+	    var t = {};
 
+	    if (_isMulti) {
+	      t[d.key] = undefined;
+	    } else if (_isSemi) {
+	      var arr = _multiData.map(function (md) {
+	        return md.key === d.key ? null : md.key;
+	      }).filter(Boolean);
 
-	    if (options) {
-	        for (var k in options) {
-	            values.push(k === 'undefined' ? undefined : k);
-	            texts.push(field.t('options.' + k, { 'default': options[k] }));
-	        }
-	    } else {
-	        values = [undefined, 'yes'];
-	        texts = [_t('inspector.unknown'), _t('inspector.check.yes')];
-	        if (field.type !== 'defaultCheck') {
-	            values.push('no');
-	            texts.push(_t('inspector.check.no'));
-	        }
+	      arr = utilArrayUniq(arr);
+	      t[field.key] = arr.length ? arr.join(';') : undefined;
 	    }
 
+	    dispatch.call('change', this, t);
+	  }
 
-	    // Checks tags to see whether an undefined value is "Assumed to be Yes"
-	    function checkImpliedYes() {
-	        _impliedYes = (field.id === 'oneway_yes');
+	  function combo(selection) {
+	    _container = selection.selectAll('.form-field-input-wrap').data([0]);
+	    var type = _isMulti || _isSemi ? 'multicombo' : 'combo';
+	    _container = _container.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + type).merge(_container);
 
-	        // hack: pretend `oneway` field is a `oneway_yes` field
-	        // where implied oneway tag exists (e.g. `junction=roundabout`) #2220, #1841
-	        if (field.id === 'oneway') {
-	            var entity = context.entity(_entityIDs[0]);
-	            for (var key in entity.tags) {
-	                if (key in osmOneWayTags && (entity.tags[key] in osmOneWayTags[key])) {
-	                    _impliedYes = true;
-	                    texts[0] = _t('presets.fields.oneway_yes.options.undefined');
-	                    break;
-	                }
-	            }
-	        }
-	    }
+	    if (_isMulti || _isSemi) {
+	      _container = _container.selectAll('.chiplist').data([0]);
+	      var listClass = 'chiplist'; // Use a separate line for each value in the Destinations and Via fields
+	      // to mimic highway exit signs
 
+	      if (field.key === 'destination' || field.key === 'via') {
+	        listClass += ' full-line-chips';
+	      }
 
-	    function reverserHidden() {
-	        if (!context.container().select('div.inspector-hover').empty()) { return true; }
-	        return !(_value === 'yes' || (_impliedYes && !_value));
+	      _container = _container.enter().append('ul').attr('class', listClass).on('click', function () {
+	        window.setTimeout(function () {
+	          _input.node().focus();
+	        }, 10);
+	      }).merge(_container);
+	      _inputWrap = _container.selectAll('.input-wrap').data([0]);
+	      _inputWrap = _inputWrap.enter().append('li').attr('class', 'input-wrap').merge(_inputWrap);
+	      _input = _inputWrap.selectAll('input').data([0]);
+	    } else {
+	      _input = _container.selectAll('input').data([0]);
 	    }
 
+	    _input = _input.enter().append('input').attr('type', 'text').attr('id', field.domId).call(utilNoAuto).call(initCombo, selection).merge(_input);
 
-	    function reverserSetText(selection) {
-	        var entity = _entityIDs.length && context.hasEntity(_entityIDs[0]);
-	        if (reverserHidden() || !entity) { return selection; }
+	    if (_isNetwork) {
+	      var extent = combinedEntityExtent();
+	      var countryCode = extent && iso1A2Code(extent.center());
+	      _countryCode = countryCode && countryCode.toLowerCase();
+	    }
 
-	        var first = entity.first();
-	        var last = entity.isClosed() ? entity.nodes[entity.nodes.length - 2] : entity.last();
-	        var pseudoDirection = first < last;
-	        var icon = pseudoDirection ? '#iD-icon-forward' : '#iD-icon-backward';
+	    _input.on('change', change).on('blur', change);
 
-	        selection.selectAll('.reverser-span')
-	            .text(_t('inspector.check.reverser'))
-	            .call(svgIcon(icon, 'inline'));
+	    _input.on('keydown.field', function (d3_event) {
+	      switch (d3_event.keyCode) {
+	        case 13:
+	          // ↩ Return
+	          _input.node().blur(); // blurring also enters the value
 
-	        return selection;
-	    }
 
+	          d3_event.stopPropagation();
+	          break;
+	      }
+	    });
 
-	    var check = function(selection) {
-	        checkImpliedYes();
+	    if (_isMulti || _isSemi) {
+	      _combobox.on('accept', function () {
+	        _input.node().blur();
 
-	        label = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	        _input.node().focus();
+	      });
 
-	        var enter = label.enter()
-	            .append('label')
-	            .attr('class', 'form-field-input-wrap form-field-input-check');
+	      _input.on('focus', function () {
+	        _container.classed('active', true);
+	      });
+	    }
+	  }
 
-	        enter
-	            .append('input')
-	            .property('indeterminate', field.type !== 'defaultCheck')
-	            .attr('type', 'checkbox')
-	            .attr('id', field.domId);
+	  combo.tags = function (tags) {
+	    _tags = tags;
 
-	        enter
-	            .append('span')
-	            .text(texts[0])
-	            .attr('class', 'value');
+	    if (_isMulti || _isSemi) {
+	      _multiData = [];
+	      var maxLength;
 
-	        if (field.type === 'onewayCheck') {
-	            enter
-	                .append('a')
-	                .attr('class', 'reverser button' + (reverserHidden() ? ' hide' : ''))
-	                .attr('href', '#')
-	                .append('span')
-	                .attr('class', 'reverser-span');
+	      if (_isMulti) {
+	        // Build _multiData array containing keys already set..
+	        for (var k in tags) {
+	          if (field.key && k.indexOf(field.key) !== 0) continue;
+	          if (!field.key && field.keys.indexOf(k) === -1) continue;
+	          var v = tags[k];
+	          if (!v || typeof v === 'string' && v.toLowerCase() === 'no') continue;
+	          var suffix = field.key ? k.substr(field.key.length) : k;
+
+	          _multiData.push({
+	            key: k,
+	            value: displayValue(suffix),
+	            isMixed: Array.isArray(v)
+	          });
 	        }
 
-	        label = label.merge(enter);
-	        input = label.selectAll('input');
-	        text = label.selectAll('span.value');
+	        if (field.key) {
+	          // Set keys for form-field modified (needed for undo and reset buttons)..
+	          field.keys = _multiData.map(function (d) {
+	            return d.key;
+	          }); // limit the input length so it fits after prepending the key prefix
 
-	        input
-	            .on('click', function() {
-	                event.stopPropagation();
-	                var t = {};
+	          maxLength = context.maxCharsForTagKey() - utilUnicodeCharsCount(field.key);
+	        } else {
+	          maxLength = context.maxCharsForTagKey();
+	        }
+	      } else if (_isSemi) {
+	        var allValues = [];
+	        var commonValues;
 
-	                if (Array.isArray(_tags[field.key])) {
-	                    if (values.indexOf('yes') !== -1) {
-	                        t[field.key] = 'yes';
-	                    } else {
-	                        t[field.key] = values[0];
-	                    }
-	                } else {
-	                    t[field.key] = values[(values.indexOf(_value) + 1) % values.length];
-	                }
+	        if (Array.isArray(tags[field.key])) {
+	          tags[field.key].forEach(function (tagVal) {
+	            var thisVals = utilArrayUniq((tagVal || '').split(';')).filter(Boolean);
+	            allValues = allValues.concat(thisVals);
 
-	                // Don't cycle through `alternating` or `reversible` states - #4970
-	                // (They are supported as translated strings, but should not toggle with clicks)
-	                if (t[field.key] === 'reversible' || t[field.key] === 'alternating') {
-	                    t[field.key] = values[0];
-	                }
+	            if (!commonValues) {
+	              commonValues = thisVals;
+	            } else {
+	              commonValues = commonValues.filter(function (value) {
+	                return thisVals.includes(value);
+	              });
+	            }
+	          });
+	          allValues = utilArrayUniq(allValues).filter(Boolean);
+	        } else {
+	          allValues = utilArrayUniq((tags[field.key] || '').split(';')).filter(Boolean);
+	          commonValues = allValues;
+	        }
 
-	                dispatch$1.call('change', this, t);
-	            });
+	        _multiData = allValues.map(function (v) {
+	          return {
+	            key: v,
+	            value: displayValue(v),
+	            isMixed: !commonValues.includes(v)
+	          };
+	        });
+	        var currLength = utilUnicodeCharsCount(commonValues.join(';')); // limit the input length to the remaining available characters
 
-	        if (field.type === 'onewayCheck') {
-	            reverser = label.selectAll('.reverser');
-
-	            reverser
-	                .call(reverserSetText)
-	                .on('click', function() {
-	                    event.preventDefault();
-	                    event.stopPropagation();
-	                    context.perform(
-	                        function(graph) {
-	                            for (var i in _entityIDs) {
-	                                graph = actionReverse(_entityIDs[i])(graph);
-	                            }
-	                            return graph;
-	                        },
-	                        _t('operations.reverse.annotation')
-	                    );
-
-	                    // must manually revalidate since no 'change' event was called
-	                    context.validator().validate();
+	        maxLength = context.maxCharsForTagValue() - currLength;
 
-	                    select(this)
-	                        .call(reverserSetText);
-	                });
+	        if (currLength > 0) {
+	          // account for the separator if a new value will be appended to existing
+	          maxLength -= 1;
 	        }
-	    };
+	      } // a negative maxlength doesn't make sense
 
 
-	    check.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return check;
-	    };
+	      maxLength = Math.max(0, maxLength);
+	      var allowDragAndDrop = _isSemi // only semiCombo values are ordered
+	      && !Array.isArray(tags[field.key]); // Exclude existing multikeys from combo options..
 
+	      var available = objectDifference(_comboData, _multiData);
 
-	    check.tags = function(tags) {
+	      _combobox.data(available); // Hide 'Add' button if this field uses fixed set of
+	      // options and they're all currently used,
+	      // or if the field is already at its character limit
 
-	        _tags = tags;
 
-	        function isChecked(val) {
-	            return val !== 'no' && val !== '' && val !== undefined && val !== null;
-	        }
+	      var hideAdd = !_allowCustomValues && !available.length || maxLength <= 0;
 
-	        function textFor(val) {
-	            if (val === '') { val = undefined; }
-	            var index = values.indexOf(val);
-	            return (index !== -1 ? texts[index] : ('"' + val + '"'));
-	        }
+	      _container.selectAll('.chiplist .input-wrap').style('display', hideAdd ? 'none' : null); // Render chips
 
-	        checkImpliedYes();
 
-	        var isMixed = Array.isArray(tags[field.key]);
+	      var chips = _container.selectAll('.chip').data(_multiData);
 
-	        _value = !isMixed && tags[field.key] && tags[field.key].toLowerCase();
+	      chips.exit().remove();
+	      var enter = chips.enter().insert('li', '.input-wrap').attr('class', 'chip');
+	      enter.append('span');
+	      enter.append('a');
+	      chips = chips.merge(enter).order().classed('raw-value', function (d) {
+	        var k = d.key;
+	        if (_isMulti) k = k.replace(field.key, '');
+	        return !field.hasTextForStringId('options.' + k);
+	      }).classed('draggable', allowDragAndDrop).classed('mixed', function (d) {
+	        return d.isMixed;
+	      }).attr('title', function (d) {
+	        return d.isMixed ? _t('inspector.unshared_value_tooltip') : null;
+	      });
+
+	      if (allowDragAndDrop) {
+	        registerDragAndDrop(chips);
+	      }
 
-	        if (field.type === 'onewayCheck' && (_value === '1' || _value === '-1')) {
-	            _value = 'yes';
+	      chips.select('span').html(function (d) {
+	        return d.value;
+	      });
+	      chips.select('a').attr('href', '#').on('click', removeMultikey).attr('class', 'remove').html('×');
+	    } else {
+	      var isMixed = Array.isArray(tags[field.key]);
+	      var mixedValues = isMixed && tags[field.key].map(function (val) {
+	        return displayValue(val);
+	      }).filter(Boolean);
+	      var showsValue = !isMixed && tags[field.key] && !(field.type === 'typeCombo' && tags[field.key] === 'yes');
+	      var isRawValue = showsValue && !field.hasTextForStringId('options.' + tags[field.key]);
+	      var isKnownValue = showsValue && !isRawValue;
+	      var isReadOnly = !_allowCustomValues || isKnownValue;
+	      utilGetSetValue(_input, !isMixed ? displayValue(tags[field.key]) : '').classed('raw-value', isRawValue).classed('known-value', isKnownValue).attr('readonly', isReadOnly ? 'readonly' : undefined).attr('title', isMixed ? mixedValues.join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : _staticPlaceholder || '').classed('mixed', isMixed).on('keydown.deleteCapture', function (d3_event) {
+	        if (isReadOnly && isKnownValue && (d3_event.keyCode === utilKeybinding.keyCodes['⌫'] || d3_event.keyCode === utilKeybinding.keyCodes['⌦'])) {
+	          d3_event.preventDefault();
+	          d3_event.stopPropagation();
+	          var t = {};
+	          t[field.key] = undefined;
+	          dispatch.call('change', this, t);
 	        }
+	      });
+	    }
+	  };
 
-	        input
-	            .property('indeterminate', isMixed || (field.type !== 'defaultCheck' && !_value))
-	            .property('checked', isChecked(_value));
+	  function registerDragAndDrop(selection) {
+	    // allow drag and drop re-ordering of chips
+	    var dragOrigin, targetIndex;
+	    selection.call(d3_drag().on('start', function (d3_event) {
+	      dragOrigin = {
+	        x: d3_event.x,
+	        y: d3_event.y
+	      };
+	      targetIndex = null;
+	    }).on('drag', function (d3_event) {
+	      var x = d3_event.x - dragOrigin.x,
+	          y = d3_event.y - dragOrigin.y;
+	      if (!select(this).classed('dragging') && // don't display drag until dragging beyond a distance threshold
+	      Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= 5) return;
+	      var index = selection.nodes().indexOf(this);
+	      select(this).classed('dragging', true);
+	      targetIndex = null;
+	      var targetIndexOffsetTop = null;
+	      var draggedTagWidth = select(this).node().offsetWidth;
+
+	      if (field.key === 'destination' || field.key === 'via') {
+	        // meaning tags are full width
+	        _container.selectAll('.chip').style('transform', function (d2, index2) {
+	          var node = select(this).node();
+
+	          if (index === index2) {
+	            return 'translate(' + x + 'px, ' + y + 'px)'; // move the dragged tag up the order
+	          } else if (index2 > index && d3_event.y > node.offsetTop) {
+	            if (targetIndex === null || index2 > targetIndex) {
+	              targetIndex = index2;
+	            }
+
+	            return 'translateY(-100%)'; // move the dragged tag down the order
+	          } else if (index2 < index && d3_event.y < node.offsetTop + node.offsetHeight) {
+	            if (targetIndex === null || index2 < targetIndex) {
+	              targetIndex = index2;
+	            }
+
+	            return 'translateY(100%)';
+	          }
 
-	        text
-	            .text(isMixed ? _t('inspector.multiple_values') : textFor(_value))
-	            .classed('mixed', isMixed);
+	          return null;
+	        });
+	      } else {
+	        _container.selectAll('.chip').each(function (d2, index2) {
+	          var node = select(this).node(); // check the cursor is in the bounding box
 
-	        label
-	            .classed('set', !!_value);
+	          if (index !== index2 && d3_event.x < node.offsetLeft + node.offsetWidth + 5 && d3_event.x > node.offsetLeft && d3_event.y < node.offsetTop + node.offsetHeight && d3_event.y > node.offsetTop) {
+	            targetIndex = index2;
+	            targetIndexOffsetTop = node.offsetTop;
+	          }
+	        }).style('transform', function (d2, index2) {
+	          var node = select(this).node();
 
-	        if (field.type === 'onewayCheck') {
-	            reverser
-	                .classed('hide', reverserHidden())
-	                .call(reverserSetText);
-	        }
-	    };
+	          if (index === index2) {
+	            return 'translate(' + x + 'px, ' + y + 'px)';
+	          } // only translate tags in the same row
 
 
-	    check.focus = function() {
-	        input.node().focus();
-	    };
+	          if (node.offsetTop === targetIndexOffsetTop) {
+	            if (index2 < index && index2 >= targetIndex) {
+	              return 'translateX(' + draggedTagWidth + 'px)';
+	            } else if (index2 > index && index2 <= targetIndex) {
+	              return 'translateX(-' + draggedTagWidth + 'px)';
+	            }
+	          }
 
-	    return utilRebind(check, dispatch$1, 'on');
-	}
+	          return null;
+	        });
+	      }
+	    }).on('end', function () {
+	      if (!select(this).classed('dragging')) {
+	        return;
+	      }
 
-	function uiFieldCombo(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var taginfo = services.taginfo;
-	    var isMulti = (field.type === 'multiCombo');
-	    var isNetwork = (field.type === 'networkCombo');
-	    var isSemi = (field.type === 'semiCombo');
-	    var optstrings = field.strings && field.strings.options;
-	    var optarray = field.options;
-	    var snake_case = (field.snake_case || (field.snake_case === undefined));
-	    var caseSensitive = field.caseSensitive;
-	    var combobox = uiCombobox(context, 'combo-' + field.safeid)
-	        .caseSensitive(caseSensitive)
-	        .minItems(isMulti || isSemi ? 1 : 2);
-	    var container = select(null);
-	    var inputWrap = select(null);
-	    var input = select(null);
-	    var _comboData = [];
-	    var _multiData = [];
-	    var _entityIDs = [];
-	    var _tags;
-	    var _countryCode;
-	    var _staticPlaceholder;
-
-	    // initialize deprecated tags array
-	    var _dataDeprecated = [];
-	    _mainFileFetcher.get('deprecated')
-	        .then(function(d) { _dataDeprecated = d; })
-	        .catch(function() { /* ignore */ });
-
-
-	    // ensure multiCombo field.key ends with a ':'
-	    if (isMulti && /[^:]$/.test(field.key)) {
-	        field.key += ':';
-	    }
-
-
-	    function snake(s) {
-	        return s.replace(/\s+/g, '_');
-	    }
-
-	    function unsnake(s) {
-	        return s.replace(/_+/g, ' ');
-	    }
-
-	    function clean(s) {
-	        return s.split(';')
-	            .map(function(s) { return s.trim(); })
-	            .join(';');
-	    }
+	      var index = selection.nodes().indexOf(this);
+	      select(this).classed('dragging', false);
 
+	      _container.selectAll('.chip').style('transform', null);
 
-	    // returns the tag value for a display value
-	    // (for multiCombo, dval should be the key suffix, not the entire key)
-	    function tagValue(dval) {
-	        dval = clean(dval || '');
+	      if (typeof targetIndex === 'number') {
+	        var element = _multiData[index];
 
-	        if (optstrings) {
-	            var found = _comboData.find(function(o) {
-	                return o.key && clean(o.value) === dval;
-	            });
-	            if (found) {
-	                return found.key;
-	            }
-	        }
+	        _multiData.splice(index, 1);
 
-	        if (field.type === 'typeCombo' && !dval) {
-	            return 'yes';
-	        }
+	        _multiData.splice(targetIndex, 0, element);
 
-	        return (snake_case ? snake(dval) : dval) || undefined;
-	    }
+	        var t = {};
 
+	        if (_multiData.length) {
+	          t[field.key] = _multiData.map(function (element) {
+	            return element.key;
+	          }).join(';');
+	        } else {
+	          t[field.key] = undefined;
+	        }
 
-	    // returns the display value for a tag value
-	    // (for multiCombo, tval should be the key suffix, not the entire key)
-	    function displayValue(tval) {
-	        tval = tval || '';
+	        dispatch.call('change', this, t);
+	      }
 
-	        if (optstrings) {
-	            var found = _comboData.find(function(o) {
-	                return o.key === tval && o.value;
-	            });
-	            if (found) {
-	                return found.value;
-	            }
-	        }
+	      dragOrigin = undefined;
+	      targetIndex = undefined;
+	    }));
+	  }
 
-	        if (field.type === 'typeCombo' && tval.toLowerCase() === 'yes') {
-	            return '';
-	        }
+	  combo.focus = function () {
+	    _input.node().focus();
+	  };
 
-	        return snake_case ? unsnake(tval) : tval;
-	    }
+	  combo.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return combo;
+	  };
 
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	  }
 
-	    // Compute the difference between arrays of objects by `value` property
-	    //
-	    // objectDifference([{value:1}, {value:2}, {value:3}], [{value:2}])
-	    // > [{value:1}, {value:3}]
-	    //
-	    function objectDifference(a, b) {
-	        return a.filter(function(d1) {
-	            return !b.some(function(d2) {
-	                return !d2.isMixed && d1.value === d2.value;
-	            });
-	        });
-	    }
+	  return utilRebind(combo, dispatch, 'on');
+	}
 
+	function uiFieldText(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var input = select(null);
+	  var outlinkButton = select(null);
+	  var _entityIDs = [];
 
-	    function initCombo(selection, attachTo) {
-	        if (optstrings) {
-	            selection.attr('readonly', 'readonly');
-	            selection.call(combobox, attachTo);
-	            setStaticValues(setPlaceholder);
+	  var _tags;
 
-	        } else if (optarray) {
-	            selection.call(combobox, attachTo);
-	            setStaticValues(setPlaceholder);
+	  var _phoneFormats = {};
 
-	        } else if (taginfo) {
-	            selection.call(combobox.fetcher(setTaginfoValues), attachTo);
-	            setTaginfoValues('', setPlaceholder);
-	        }
-	    }
+	  if (field.type === 'tel') {
+	    _mainFileFetcher.get('phone_formats').then(function (d) {
+	      _phoneFormats = d;
+	      updatePhonePlaceholder();
+	    })["catch"](function () {
+	      /* ignore */
+	    });
+	  }
 
+	  function calcLocked() {
+	    // Protect certain fields that have a companion `*:wikidata` value
+	    var isLocked = (field.id === 'brand' || field.id === 'network' || field.id === 'operator' || field.id === 'flag') && _entityIDs.length && _entityIDs.some(function (entityID) {
+	      var entity = context.graph().hasEntity(entityID);
+	      if (!entity) return false; // Features linked to Wikidata are likely important and should be protected
 
-	    function setStaticValues(callback) {
-	        if (!(optstrings || optarray)) { return; }
+	      if (entity.tags.wikidata) return true;
+	      var preset = _mainPresetIndex.match(entity, context.graph());
+	      var isSuggestion = preset && preset.suggestion; // Lock the field if there is a value and a companion `*:wikidata` value
 
-	        if (optstrings) {
-	            _comboData = Object.keys(optstrings).map(function(k) {
-	                var v = field.t('options.' + k, { 'default': optstrings[k] });
-	                return {
-	                    key: k,
-	                    value: v,
-	                    title: v
-	                };
-	            });
+	      var which = field.id; // 'brand', 'network', 'operator', 'flag'
 
-	        } else if (optarray) {
-	            _comboData = optarray.map(function(k) {
-	                var v = snake_case ? unsnake(k) : k;
-	                return {
-	                    key: k,
-	                    value: v,
-	                    title: v
-	                };
-	            });
-	        }
+	      return isSuggestion && !!entity.tags[which] && !!entity.tags[which + ':wikidata'];
+	    });
 
-	        combobox.data(objectDifference(_comboData, _multiData));
-	        if (callback) { callback(_comboData); }
-	    }
+	    field.locked(isLocked);
+	  }
 
+	  function i(selection) {
+	    calcLocked();
+	    var isLocked = field.locked();
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    input = wrap.selectAll('input').data([0]);
+	    input = input.enter().append('input').attr('type', field.type === 'identifier' ? 'text' : field.type).attr('id', field.domId).classed(field.type, true).call(utilNoAuto).merge(input);
+	    input.classed('disabled', !!isLocked).attr('readonly', isLocked || null).on('input', change(true)).on('blur', change()).on('change', change());
 
-	    function setTaginfoValues(q, callback) {
-	        var fn = isMulti ? 'multikeys' : 'values';
-	        var query = (isMulti ? field.key : '') + q;
-	        var hasCountryPrefix = isNetwork && _countryCode && _countryCode.indexOf(q.toLowerCase()) === 0;
-	        if (hasCountryPrefix) {
-	            query = _countryCode + ':';
+	    if (field.type === 'tel') {
+	      updatePhonePlaceholder();
+	    } else if (field.type === 'number') {
+	      var rtl = _mainLocalizer.textDirection() === 'rtl';
+	      input.attr('type', 'text');
+	      var inc = field.increment;
+	      var buttons = wrap.selectAll('.increment, .decrement').data(rtl ? [inc, -inc] : [-inc, inc]);
+	      buttons.enter().append('button').attr('class', function (d) {
+	        var which = d > 0 ? 'increment' : 'decrement';
+	        return 'form-field-button ' + which;
+	      }).merge(buttons).on('click', function (d3_event, d) {
+	        d3_event.preventDefault();
+	        var raw_vals = input.node().value || '0';
+	        var vals = raw_vals.split(';');
+	        vals = vals.map(function (v) {
+	          var num = parseFloat(v.trim(), 10);
+	          return isFinite(num) ? clamped(num + d) : v.trim();
+	        });
+	        input.node().value = vals.join(';');
+	        change()();
+	      });
+	    } else if (field.type === 'identifier' && field.urlFormat && field.pattern) {
+	      input.attr('type', 'text');
+	      outlinkButton = wrap.selectAll('.foreign-id-permalink').data([0]);
+	      outlinkButton.enter().append('button').call(svgIcon('#iD-icon-out-link')).attr('class', 'form-field-button foreign-id-permalink').attr('title', function () {
+	        var domainResults = /^https?:\/\/(.{1,}?)\//.exec(field.urlFormat);
+
+	        if (domainResults.length >= 2 && domainResults[1]) {
+	          var domain = domainResults[1];
+	          return _t('icons.view_on', {
+	            domain: domain
+	          });
 	        }
 
-	        var params = {
-	            debounce: (q !== ''),
-	            key: field.key,
-	            query: query
-	        };
+	        return '';
+	      }).on('click', function (d3_event) {
+	        d3_event.preventDefault();
+	        var value = validIdentifierValueForLink();
 
-	        if (_entityIDs.length) {
-	            params.geometry = context.graph().geometry(_entityIDs[0]);
+	        if (value) {
+	          var url = field.urlFormat.replace(/{value}/, encodeURIComponent(value));
+	          window.open(url, '_blank');
 	        }
+	      }).merge(outlinkButton);
+	    } else if (field.type === 'url') {
+	      input.attr('type', 'text');
+	      outlinkButton = wrap.selectAll('.foreign-id-permalink').data([0]);
+	      outlinkButton.enter().append('button').call(svgIcon('#iD-icon-out-link')).attr('class', 'form-field-button foreign-id-permalink').attr('title', function () {
+	        return _t('icons.visit_website');
+	      }).on('click', function (d3_event) {
+	        d3_event.preventDefault();
+	        var value = validIdentifierValueForLink();
+	        if (value) window.open(value, '_blank');
+	      }).merge(outlinkButton);
+	    }
+	  }
 
-	        taginfo[fn](params, function(err, data) {
-	            if (err) { return; }
+	  function updatePhonePlaceholder() {
+	    if (input.empty() || !Object.keys(_phoneFormats).length) return;
+	    var extent = combinedEntityExtent();
+	    var countryCode = extent && iso1A2Code(extent.center());
 
-	            data = data.filter(function(d) {
+	    var format = countryCode && _phoneFormats[countryCode.toLowerCase()];
 
-	                if (field.type === 'typeCombo' && d.value === 'yes') {
-	                    // don't show the fallback value
-	                    return false;
-	                }
+	    if (format) input.attr('placeholder', format);
+	  }
 
-	                // don't show values with very low usage
-	                return !d.count || d.count > 10;
-	            });
+	  function validIdentifierValueForLink() {
+	    var value = utilGetSetValue(input).trim().split(';')[0];
+	    if (field.type === 'url' && value) return value;
 
-	            var deprecatedValues = osmEntity.deprecatedTagValuesByKey(_dataDeprecated)[field.key];
-	            if (deprecatedValues) {
-	                // don't suggest deprecated tag values
-	                data = data.filter(function(d) {
-	                    return deprecatedValues.indexOf(d.value) === -1;
-	                });
-	            }
+	    if (field.type === 'identifier' && field.pattern) {
+	      return value && value.match(new RegExp(field.pattern));
+	    }
 
-	            if (hasCountryPrefix) {
-	                data = data.filter(function(d) {
-	                    return d.value.toLowerCase().indexOf(_countryCode + ':') === 0;
-	                });
-	            }
+	    return null;
+	  } // clamp number to min/max
 
-	            // hide the caret if there are no suggestions
-	            container.classed('empty-combobox', data.length === 0);
-
-	            _comboData = data.map(function(d) {
-	                var k = d.value;
-	                if (isMulti) { k = k.replace(field.key, ''); }
-	                var v = snake_case ? unsnake(k) : k;
-	                return {
-	                    key: k,
-	                    value: v,
-	                    title: isMulti ? v : d.title
-	                };
-	            });
 
-	            _comboData = objectDifference(_comboData, _multiData);
-	            if (callback) { callback(_comboData); }
-	        });
+	  function clamped(num) {
+	    if (field.minValue !== undefined) {
+	      num = Math.max(num, field.minValue);
 	    }
 
+	    if (field.maxValue !== undefined) {
+	      num = Math.min(num, field.maxValue);
+	    }
 
-	    function setPlaceholder(values) {
-
-	        if (isMulti || isSemi) {
-	            _staticPlaceholder = field.placeholder() || _t('inspector.add');
-	        } else {
-	            var vals = values
-	                .map(function(d) { return d.value; })
-	                .filter(function(s) { return s.length < 20; });
+	    return num;
+	  }
 
-	            var placeholders = vals.length > 1 ? vals : values.map(function(d) { return d.key; });
-	            _staticPlaceholder = field.placeholder() || placeholders.slice(0, 3).join(', ');
-	        }
+	  function change(onInput) {
+	    return function () {
+	      var t = {};
+	      var val = utilGetSetValue(input);
+	      if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string
 
-	        if (!/(…|\.\.\.)$/.test(_staticPlaceholder)) {
-	            _staticPlaceholder += '…';
-	        }
+	      if (!val && Array.isArray(_tags[field.key])) return;
 
-	        var ph;
-	        if (!isMulti && !isSemi && _tags && Array.isArray(_tags[field.key])) {
-	            ph = _t('inspector.multiple_values');
-	        } else {
-	            ph =  _staticPlaceholder;
+	      if (!onInput) {
+	        if (field.type === 'number' && val) {
+	          var vals = val.split(';');
+	          vals = vals.map(function (v) {
+	            var num = parseFloat(v.trim(), 10);
+	            return isFinite(num) ? clamped(num) : v.trim();
+	          });
+	          val = vals.join(';');
 	        }
 
-	        container.selectAll('input')
-	            .attr('placeholder', ph);
-	    }
+	        utilGetSetValue(input, val);
+	      }
 
+	      t[field.key] = val || undefined;
+	      dispatch.call('change', this, t, onInput);
+	    };
+	  }
 
-	    function change() {
-	        var t = {};
-	        var val;
-
-	        if (isMulti || isSemi) {
-	            val = tagValue(utilGetSetValue(input).replace(/,/g, ';')) || '';
-	            container.classed('active', false);
-	            utilGetSetValue(input, '');
-
-	            var vals = val.split(';').filter(Boolean);
-	            if (!vals.length) { return; }
-
-	            if (isMulti) {
-	                utilArrayUniq(vals).forEach(function(v) {
-	                    var key = field.key + v;
-	                    if (_tags) {
-	                        // don't set a multicombo value to 'yes' if it already has a non-'no' value
-	                        // e.g. `language:de=main`
-	                        var old = _tags[key];
-	                        if (typeof old === 'string' && old.toLowerCase() !== 'no') { return; }
-	                    }
-	                    key = context.cleanTagKey(key);
-	                    field.keys.push(key);
-	                    t[key] = 'yes';
-	                });
+	  i.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return i;
+	  };
 
-	            } else if (isSemi) {
-	                var arr = _multiData.map(function(d) { return d.key; });
-	                arr = arr.concat(vals);
-	                t[field.key] = context.cleanTagValue(utilArrayUniq(arr).filter(Boolean).join(';'));
-	            }
+	  i.tags = function (tags) {
+	    _tags = tags;
+	    var isMixed = Array.isArray(tags[field.key]);
+	    utilGetSetValue(input, !isMixed && tags[field.key] ? tags[field.key] : '').attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder() || _t('inspector.unknown')).classed('mixed', isMixed);
 
-	            window.setTimeout(function() { input.node().focus(); }, 10);
+	    if (outlinkButton && !outlinkButton.empty()) {
+	      var disabled = !validIdentifierValueForLink();
+	      outlinkButton.classed('disabled', disabled);
+	    }
+	  };
 
-	        } else {
-	            var rawValue = utilGetSetValue(input);
+	  i.focus = function () {
+	    var node = input.node();
+	    if (node) node.focus();
+	  };
 
-	            // don't override multiple values with blank string
-	            if (!rawValue && Array.isArray(_tags[field.key])) { return; }
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	  }
 
-	            val = context.cleanTagValue(tagValue(rawValue));
-	            t[field.key] = val || undefined;
-	        }
+	  return utilRebind(i, dispatch, 'on');
+	}
 
-	        dispatch$1.call('change', this, t);
-	    }
+	function uiFieldAccess(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var items = select(null);
 
+	  var _tags;
 
-	    function removeMultikey(d) {
-	        event.stopPropagation();
-	        var t = {};
-	        if (isMulti) {
-	            t[d.key] = undefined;
-	        } else if (isSemi) {
-	            var arr = _multiData.map(function(md) {
-	                return md.key === d.key ? null : md.key;
-	            }).filter(Boolean);
+	  function access(selection) {
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    var list = wrap.selectAll('ul').data([0]);
+	    list = list.enter().append('ul').attr('class', 'rows').merge(list);
+	    items = list.selectAll('li').data(field.keys); // Enter
 
-	            arr = utilArrayUniq(arr);
-	            t[field.key] = arr.length ? arr.join(';') : undefined;
-	        }
-	        dispatch$1.call('change', this, t);
-	    }
+	    var enter = items.enter().append('li').attr('class', function (d) {
+	      return 'labeled-input preset-access-' + d;
+	    });
+	    enter.append('span').attr('class', 'label preset-label-access').attr('for', function (d) {
+	      return 'preset-input-access-' + d;
+	    }).html(function (d) {
+	      return field.t.html('types.' + d);
+	    });
+	    enter.append('div').attr('class', 'preset-input-access-wrap').append('input').attr('type', 'text').attr('class', function (d) {
+	      return 'preset-input-access preset-input-access-' + d;
+	    }).call(utilNoAuto).each(function (d) {
+	      select(this).call(uiCombobox(context, 'access-' + d).data(access.options(d)));
+	    }); // Update
 
+	    items = items.merge(enter);
+	    wrap.selectAll('.preset-input-access').on('change', change).on('blur', change);
+	  }
 
-	    function combo(selection) {
-	        container = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	  function change(d3_event, d) {
+	    var tag = {};
+	    var value = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string
 
-	        var type = (isMulti || isSemi) ? 'multicombo': 'combo';
-	        container = container.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + type)
-	            .merge(container);
+	    if (!value && typeof _tags[d] !== 'string') return;
+	    tag[d] = value || undefined;
+	    dispatch.call('change', this, tag);
+	  }
 
-	        if (isMulti || isSemi) {
-	            container = container.selectAll('.chiplist')
-	                .data([0]);
+	  access.options = function (type) {
+	    var options = ['no', 'permissive', 'private', 'permit', 'destination'];
 
-	            var listClass = 'chiplist';
+	    if (type !== 'access') {
+	      options.unshift('yes');
+	      options.push('designated');
 
-	            // Use a separate line for each value in the Destinations field
-	            // to mimic highway exit signs
-	            if (field.key === 'destination') {
-	                listClass += ' full-line-chips';
-	            }
+	      if (type === 'bicycle') {
+	        options.push('dismount');
+	      }
+	    }
 
-	            container = container.enter()
-	                .append('ul')
-	                .attr('class', listClass)
-	                .on('click', function() {
-	                    window.setTimeout(function() { input.node().focus(); }, 10);
-	                })
-	                .merge(container);
+	    return options.map(function (option) {
+	      return {
+	        title: field.t('options.' + option + '.description'),
+	        value: option
+	      };
+	    });
+	  };
 
+	  var placeholdersByHighway = {
+	    footway: {
+	      foot: 'designated',
+	      motor_vehicle: 'no'
+	    },
+	    steps: {
+	      foot: 'yes',
+	      motor_vehicle: 'no',
+	      bicycle: 'no',
+	      horse: 'no'
+	    },
+	    pedestrian: {
+	      foot: 'yes',
+	      motor_vehicle: 'no'
+	    },
+	    cycleway: {
+	      motor_vehicle: 'no',
+	      bicycle: 'designated'
+	    },
+	    bridleway: {
+	      motor_vehicle: 'no',
+	      horse: 'designated'
+	    },
+	    path: {
+	      foot: 'yes',
+	      motor_vehicle: 'no',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    motorway: {
+	      foot: 'no',
+	      motor_vehicle: 'yes',
+	      bicycle: 'no',
+	      horse: 'no'
+	    },
+	    trunk: {
+	      motor_vehicle: 'yes'
+	    },
+	    primary: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    secondary: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    tertiary: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    residential: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    unclassified: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    service: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    motorway_link: {
+	      foot: 'no',
+	      motor_vehicle: 'yes',
+	      bicycle: 'no',
+	      horse: 'no'
+	    },
+	    trunk_link: {
+	      motor_vehicle: 'yes'
+	    },
+	    primary_link: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    secondary_link: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    tertiary_link: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    }
+	  };
+
+	  access.tags = function (tags) {
+	    _tags = tags;
+	    utilGetSetValue(items.selectAll('.preset-input-access'), function (d) {
+	      return typeof tags[d] === 'string' ? tags[d] : '';
+	    }).classed('mixed', function (d) {
+	      return tags[d] && Array.isArray(tags[d]);
+	    }).attr('title', function (d) {
+	      return tags[d] && Array.isArray(tags[d]) && tags[d].filter(Boolean).join('\n');
+	    }).attr('placeholder', function (d) {
+	      if (tags[d] && Array.isArray(tags[d])) {
+	        return _t('inspector.multiple_values');
+	      }
 
-	            inputWrap = container.selectAll('.input-wrap')
-	                .data([0]);
+	      if (d === 'access') {
+	        return 'yes';
+	      }
 
-	            inputWrap = inputWrap.enter()
-	                .append('li')
-	                .attr('class', 'input-wrap')
-	                .merge(inputWrap);
+	      if (tags.access && typeof tags.access === 'string') {
+	        return tags.access;
+	      }
 
-	            input = inputWrap.selectAll('input')
-	                .data([0]);
+	      if (tags.highway) {
+	        if (typeof tags.highway === 'string') {
+	          if (placeholdersByHighway[tags.highway] && placeholdersByHighway[tags.highway][d]) {
+	            return placeholdersByHighway[tags.highway][d];
+	          }
 	        } else {
-	            input = container.selectAll('input')
-	                .data([0]);
-	        }
-
-	        input = input.enter()
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('id', field.domId)
-	            .call(utilNoAuto)
-	            .call(initCombo, selection)
-	            .merge(input);
-
-	        if (isNetwork) {
-	            var extent = combinedEntityExtent();
-	            var countryCode = extent && iso1A2Code(extent.center());
-	            _countryCode = countryCode && countryCode.toLowerCase();
-	        }
-
-	        input
-	            .on('change', change)
-	            .on('blur', change);
-
-	        input
-	            .on('keydown.field', function() {
-	                switch (event.keyCode) {
-	                    case 13: // ↩ Return
-	                        input.node().blur(); // blurring also enters the value
-	                        event.stopPropagation();
-	                        break;
-	                }
-	            });
-
-	        if (isMulti || isSemi) {
-	            combobox
-	                .on('accept', function() {
-	                    input.node().blur();
-	                    input.node().focus();
-	                });
+	          var impliedAccesses = tags.highway.filter(Boolean).map(function (highwayVal) {
+	            return placeholdersByHighway[highwayVal] && placeholdersByHighway[highwayVal][d];
+	          }).filter(Boolean);
 
-	            input
-	                .on('focus', function() { container.classed('active', true); });
+	          if (impliedAccesses.length === tags.highway.length && new Set(impliedAccesses).size === 1) {
+	            // if all the highway values have the same implied access for this type then use that
+	            return impliedAccesses[0];
+	          }
 	        }
-	    }
+	      }
 
+	      return field.placeholder();
+	    });
+	  };
 
-	    combo.tags = function(tags) {
-	        _tags = tags;
+	  access.focus = function () {
+	    items.selectAll('.preset-input-access').node().focus();
+	  };
 
-	        if (isMulti || isSemi) {
-	            _multiData = [];
+	  return utilRebind(access, dispatch, 'on');
+	}
 
-	            var maxLength;
+	function uiFieldAddress(field, context) {
+	  var dispatch = dispatch$8('change');
 
-	            if (isMulti) {
-	                // Build _multiData array containing keys already set..
-	                for (var k in tags) {
-	                    if (k.indexOf(field.key) !== 0) { continue; }
-	                    var v = tags[k];
-	                    if (!v || (typeof v === 'string' && v.toLowerCase() === 'no')) { continue; }
+	  var _selection = select(null);
 
-	                    var suffix = k.substring(field.key.length);
-	                    _multiData.push({
-	                        key: k,
-	                        value: displayValue(suffix),
-	                        isMixed: Array.isArray(v)
-	                    });
-	                }
+	  var _wrap = select(null);
 
-	                // Set keys for form-field modified (needed for undo and reset buttons)..
-	                field.keys = _multiData.map(function(d) { return d.key; });
+	  var addrField = _mainPresetIndex.field('address'); // needed for placeholder strings
 
-	                // limit the input length so it fits after prepending the key prefix
-	                maxLength = context.maxCharsForTagKey() - utilUnicodeCharsCount(field.key);
+	  var _entityIDs = [];
 
-	            } else if (isSemi) {
+	  var _tags;
 
-	                var allValues = [];
-	                var commonValues;
-	                if (Array.isArray(tags[field.key])) {
+	  var _countryCode;
 
-	                    tags[field.key].forEach(function(tagVal) {
-	                        var thisVals = utilArrayUniq((tagVal || '').split(';')).filter(Boolean);
-	                        allValues = allValues.concat(thisVals);
-	                        if (!commonValues) {
-	                            commonValues = thisVals;
-	                        } else {
-	                            commonValues = commonValues.filter(function (value) { return thisVals.includes(value); });
-	                        }
-	                    });
-	                    allValues = utilArrayUniq(allValues).filter(Boolean);
+	  var _addressFormats = [{
+	    format: [['housenumber', 'street'], ['city', 'postcode']]
+	  }];
+	  _mainFileFetcher.get('address_formats').then(function (d) {
+	    _addressFormats = d;
 
-	                } else {
-	                    allValues =  utilArrayUniq((tags[field.key] || '').split(';')).filter(Boolean);
-	                    commonValues = allValues;
-	                }
+	    if (!_selection.empty()) {
+	      _selection.call(address);
+	    }
+	  })["catch"](function () {
+	    /* ignore */
+	  });
 
-	                _multiData = allValues.map(function(v) {
-	                    return {
-	                        key: v,
-	                        value: displayValue(v),
-	                        isMixed: !commonValues.includes(v)
-	                    };
-	                });
+	  function getNearStreets() {
+	    var extent = combinedEntityExtent();
+	    var l = extent.center();
+	    var box = geoExtent(l).padByMeters(200);
+	    var streets = context.history().intersects(box).filter(isAddressable).map(function (d) {
+	      var loc = context.projection([(extent[0][0] + extent[1][0]) / 2, (extent[0][1] + extent[1][1]) / 2]);
+	      var choice = geoChooseEdge(context.graph().childNodes(d), loc, context.projection);
+	      return {
+	        title: d.tags.name,
+	        value: d.tags.name,
+	        dist: choice.distance
+	      };
+	    }).sort(function (a, b) {
+	      return a.dist - b.dist;
+	    });
+	    return utilArrayUniqBy(streets, 'value');
+
+	    function isAddressable(d) {
+	      return d.tags.highway && d.tags.name && d.type === 'way';
+	    }
+	  }
 
-	                var currLength = utilUnicodeCharsCount(commonValues.join(';'));
+	  function getNearCities() {
+	    var extent = combinedEntityExtent();
+	    var l = extent.center();
+	    var box = geoExtent(l).padByMeters(200);
+	    var cities = context.history().intersects(box).filter(isAddressable).map(function (d) {
+	      return {
+	        title: d.tags['addr:city'] || d.tags.name,
+	        value: d.tags['addr:city'] || d.tags.name,
+	        dist: geoSphericalDistance(d.extent(context.graph()).center(), l)
+	      };
+	    }).sort(function (a, b) {
+	      return a.dist - b.dist;
+	    });
+	    return utilArrayUniqBy(cities, 'value');
 
-	                // limit the input length to the remaining available characters
-	                maxLength = context.maxCharsForTagValue() - currLength;
+	    function isAddressable(d) {
+	      if (d.tags.name) {
+	        if (d.tags.admin_level === '8' && d.tags.boundary === 'administrative') return true;
+	        if (d.tags.border_type === 'city') return true;
+	        if (d.tags.place === 'city' || d.tags.place === 'town' || d.tags.place === 'village') return true;
+	      }
 
-	                if (currLength > 0) {
-	                    // account for the separator if a new value will be appended to existing
-	                    maxLength -= 1;
-	                }
-	            }
-	            // a negative maxlength doesn't make sense
-	            maxLength = Math.max(0, maxLength);
+	      if (d.tags['addr:city']) return true;
+	      return false;
+	    }
+	  }
 
-	            var allowDragAndDrop = isSemi // only semiCombo values are ordered
-	                && !Array.isArray(tags[field.key]);
+	  function getNearValues(key) {
+	    var extent = combinedEntityExtent();
+	    var l = extent.center();
+	    var box = geoExtent(l).padByMeters(200);
+	    var results = context.history().intersects(box).filter(function hasTag(d) {
+	      return _entityIDs.indexOf(d.id) === -1 && d.tags[key];
+	    }).map(function (d) {
+	      return {
+	        title: d.tags[key],
+	        value: d.tags[key],
+	        dist: geoSphericalDistance(d.extent(context.graph()).center(), l)
+	      };
+	    }).sort(function (a, b) {
+	      return a.dist - b.dist;
+	    });
+	    return utilArrayUniqBy(results, 'value');
+	  }
 
-	            // Exclude existing multikeys from combo options..
-	            var available = objectDifference(_comboData, _multiData);
-	            combobox.data(available);
+	  function updateForCountryCode() {
+	    if (!_countryCode) return;
+	    var addressFormat;
 
-	            // Hide 'Add' button if this field uses fixed set of
-	            // translateable optstrings and they're all currently used,
-	            // or if the field is already at its character limit
-	            var hideAdd = (optstrings && !available.length) || maxLength <= 0;
-	            container.selectAll('.chiplist .input-wrap')
-	                .style('display', hideAdd ? 'none' : null);
+	    for (var i = 0; i < _addressFormats.length; i++) {
+	      var format = _addressFormats[i];
 
+	      if (!format.countryCodes) {
+	        addressFormat = format; // choose the default format, keep going
+	      } else if (format.countryCodes.indexOf(_countryCode) !== -1) {
+	        addressFormat = format; // choose the country format, stop here
 
-	            // Render chips
-	            var chips = container.selectAll('.chip')
-	                .data(_multiData);
+	        break;
+	      }
+	    }
 
-	            chips.exit()
-	                .remove();
+	    var dropdowns = addressFormat.dropdowns || ['city', 'county', 'country', 'district', 'hamlet', 'neighbourhood', 'place', 'postcode', 'province', 'quarter', 'state', 'street', 'subdistrict', 'suburb'];
+	    var widths = addressFormat.widths || {
+	      housenumber: 1 / 3,
+	      street: 2 / 3,
+	      city: 2 / 3,
+	      state: 1 / 4,
+	      postcode: 1 / 3
+	    };
 
-	            var enter = chips.enter()
-	                .insert('li', '.input-wrap')
-	                .attr('class', 'chip');
+	    function row(r) {
+	      // Normalize widths.
+	      var total = r.reduce(function (sum, key) {
+	        return sum + (widths[key] || 0.5);
+	      }, 0);
+	      return r.map(function (key) {
+	        return {
+	          id: key,
+	          width: (widths[key] || 0.5) / total
+	        };
+	      });
+	    }
 
-	            enter.append('span');
-	            enter.append('a');
+	    var rows = _wrap.selectAll('.addr-row').data(addressFormat.format, function (d) {
+	      return d.toString();
+	    });
 
-	            chips = chips.merge(enter)
-	                .order()
-	                .classed('draggable', allowDragAndDrop)
-	                .classed('mixed', function(d) {
-	                    return d.isMixed;
-	                })
-	                .attr('title', function(d) {
-	                    return d.isMixed ? _t('inspector.unshared_value_tooltip') : null;
-	                });
+	    rows.exit().remove();
+	    rows.enter().append('div').attr('class', 'addr-row').selectAll('input').data(row).enter().append('input').property('type', 'text').call(updatePlaceholder).attr('class', function (d) {
+	      return 'addr-' + d.id;
+	    }).call(utilNoAuto).each(addDropdown).style('width', function (d) {
+	      return d.width * 100 + '%';
+	    });
 
-	            if (allowDragAndDrop) {
-	                registerDragAndDrop(chips);
-	            }
+	    function addDropdown(d) {
+	      if (dropdowns.indexOf(d.id) === -1) return; // not a dropdown
 
-	            chips.select('span')
-	                .text(function(d) { return d.value; });
+	      var nearValues = d.id === 'street' ? getNearStreets : d.id === 'city' ? getNearCities : getNearValues;
+	      select(this).call(uiCombobox(context, 'address-' + d.id).minItems(1).caseSensitive(true).fetcher(function (value, callback) {
+	        callback(nearValues('addr:' + d.id));
+	      }));
+	    }
 
-	            chips.select('a')
-	                .on('click', removeMultikey)
-	                .attr('class', 'remove')
-	                .text('×');
+	    _wrap.selectAll('input').on('blur', change()).on('change', change());
 
-	        } else {
-	            var isMixed = Array.isArray(tags[field.key]);
+	    _wrap.selectAll('input:not(.combobox-input)').on('input', change(true));
 
-	            var mixedValues = isMixed && tags[field.key].map(function(val) {
-	                return displayValue(val);
-	            }).filter(Boolean);
+	    if (_tags) updateTags(_tags);
+	  }
 
-	            utilGetSetValue(input, !isMixed ? displayValue(tags[field.key]) : '')
-	                .attr('title', isMixed ? mixedValues.join('\n') : undefined)
-	                .attr('placeholder', isMixed ? _t('inspector.multiple_values') : _staticPlaceholder || '')
-	                .classed('mixed', isMixed);
-	        }
-	    };
+	  function address(selection) {
+	    _selection = selection;
+	    _wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    _wrap = _wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(_wrap);
+	    var extent = combinedEntityExtent();
 
-	    function registerDragAndDrop(selection) {
+	    if (extent) {
+	      var countryCode;
 
-	        // allow drag and drop re-ordering of chips
-	        var dragOrigin, targetIndex;
-	        selection.call(d3_drag()
-	            .on('start', function() {
-	                dragOrigin = {
-	                    x: event.x,
-	                    y: event.y
-	                };
-	                targetIndex = null;
-	            })
-	            .on('drag', function(d, index) {
-	                var x = event.x - dragOrigin.x,
-	                    y = event.y - dragOrigin.y;
-
-	                if (!select(this).classed('dragging') &&
-	                    // don't display drag until dragging beyond a distance threshold
-	                    Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= 5) { return; }
-
-	                select(this)
-	                    .classed('dragging', true);
-
-	                targetIndex = null;
-	                var targetIndexOffsetTop = null;
-	                var draggedTagWidth = select(this).node().offsetWidth;
-
-	                if (field.key === 'destination') { // meaning tags are full width
-	                    container.selectAll('.chip')
-	                        .style('transform', function(d2, index2) {
-	                            var node = select(this).node();
-
-	                            if (index === index2) {
-	                                return 'translate(' + x + 'px, ' + y + 'px)';
-	                            // move the dragged tag up the order
-	                            } else if (index2 > index && event.y > node.offsetTop) {
-	                                if (targetIndex === null || index2 > targetIndex) {
-	                                    targetIndex = index2;
-	                                }
-	                                return 'translateY(-100%)';
-	                            // move the dragged tag down the order
-	                            } else if (index2 < index && event.y < node.offsetTop + node.offsetHeight) {
-	                                if (targetIndex === null || index2 < targetIndex) {
-	                                    targetIndex = index2;
-	                                }
-	                                return 'translateY(100%)';
-	                            }
-	                            return null;
-	                        });
-	                } else {
-	                    container.selectAll('.chip')
-	                        .each(function(d2, index2) {
-	                            var node = select(this).node();
-
-	                            // check the cursor is in the bounding box
-	                            if (
-	                                index !== index2 &&
-	                                event.x < node.offsetLeft + node.offsetWidth + 5 &&
-	                                event.x > node.offsetLeft &&
-	                                event.y < node.offsetTop + node.offsetHeight &&
-	                                event.y > node.offsetTop
-	                            ) {
-	                                targetIndex = index2;
-	                                targetIndexOffsetTop = node.offsetTop;
-	                            }
-	                        })
-	                        .style('transform', function(d2, index2) {
-	                            var node = select(this).node();
-
-	                            if (index === index2) {
-	                                return 'translate(' + x + 'px, ' + y + 'px)';
-	                            }
-
-	                            // only translate tags in the same row
-	                            if (node.offsetTop === targetIndexOffsetTop) {
-	                                if (index2 < index && index2 >= targetIndex) {
-	                                    return 'translateX(' + draggedTagWidth + 'px)';
-	                                } else if (index2 > index && index2 <= targetIndex) {
-	                                    return 'translateX(-' + draggedTagWidth + 'px)';
-	                                }
-	                            }
-	                            return null;
-	                        });
-	                    }
-	            })
-	            .on('end', function(d, index) {
-	                if (!select(this).classed('dragging')) {
-	                    return;
-	                }
+	      if (context.inIntro()) {
+	        // localize the address format for the walkthrough
+	        countryCode = _t('intro.graph.countrycode');
+	      } else {
+	        var center = extent.center();
+	        countryCode = iso1A2Code(center);
+	      }
 
-	                select(this)
-	                    .classed('dragging', false);
+	      if (countryCode) {
+	        _countryCode = countryCode.toLowerCase();
+	        updateForCountryCode();
+	      }
+	    }
+	  }
 
-	                container.selectAll('.chip')
-	                    .style('transform', null);
+	  function change(onInput) {
+	    return function () {
+	      var tags = {};
 
-	                if (typeof targetIndex === 'number') {
-	                    var element = _multiData[index];
-	                    _multiData.splice(index, 1);
-	                    _multiData.splice(targetIndex, 0, element);
+	      _wrap.selectAll('input').each(function (subfield) {
+	        var key = field.key + ':' + subfield.id;
+	        var value = this.value;
+	        if (!onInput) value = context.cleanTagValue(value); // don't override multiple values with blank string
 
-	                    var t = {};
+	        if (Array.isArray(_tags[key]) && !value) return;
+	        tags[key] = value || undefined;
+	      });
 
-	                    if (_multiData.length) {
-	                        t[field.key] = _multiData.map(function(element) {
-	                            return element.key;
-	                        }).join(';');
-	                    } else {
-	                        t[field.key] = undefined;
-	                    }
+	      dispatch.call('change', this, tags, onInput);
+	    };
+	  }
 
-	                    dispatch$1.call('change', this, t);
-	                }
-	                dragOrigin = undefined;
-	                targetIndex = undefined;
-	            })
-	        );
-	    }
+	  function updatePlaceholder(inputSelection) {
+	    return inputSelection.attr('placeholder', function (subfield) {
+	      if (_tags && Array.isArray(_tags[field.key + ':' + subfield.id])) {
+	        return _t('inspector.multiple_values');
+	      }
 
+	      if (_countryCode) {
+	        var localkey = subfield.id + '!' + _countryCode;
+	        var tkey = addrField.hasTextForStringId('placeholders.' + localkey) ? localkey : subfield.id;
+	        return addrField.t('placeholders.' + tkey);
+	      }
+	    });
+	  }
 
-	    combo.focus = function() {
-	        input.node().focus();
-	    };
+	  function updateTags(tags) {
+	    utilGetSetValue(_wrap.selectAll('input'), function (subfield) {
+	      var val = tags[field.key + ':' + subfield.id];
+	      return typeof val === 'string' ? val : '';
+	    }).attr('title', function (subfield) {
+	      var val = tags[field.key + ':' + subfield.id];
+	      return val && Array.isArray(val) && val.filter(Boolean).join('\n');
+	    }).classed('mixed', function (subfield) {
+	      return Array.isArray(tags[field.key + ':' + subfield.id]);
+	    }).call(updatePlaceholder);
+	  }
 
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	  }
 
-	    combo.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return combo;
-	    };
+	  address.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return address;
+	  };
 
+	  address.tags = function (tags) {
+	    _tags = tags;
+	    updateTags(tags);
+	  };
 
-	    function combinedEntityExtent() {
-	        return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
-	    }
+	  address.focus = function () {
+	    var node = _wrap.selectAll('input').node();
 
+	    if (node) node.focus();
+	  };
 
-	    return utilRebind(combo, dispatch$1, 'on');
+	  return utilRebind(address, dispatch, 'on');
 	}
 
-	function uiFieldText(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var input = select(null);
-	    var outlinkButton = select(null);
-	    var _entityIDs = [];
-	    var _tags;
-	    var _phoneFormats = {};
+	function uiFieldCycleway(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var items = select(null);
+	  var wrap = select(null);
 
-	    if (field.type === 'tel') {
-	        _mainFileFetcher.get('phone_formats')
-	            .then(function(d) {
-	                _phoneFormats = d;
-	                updatePhonePlaceholder();
-	            })
-	            .catch(function() { /* ignore */ });
+	  var _tags;
+
+	  function cycleway(selection) {
+	    function stripcolon(s) {
+	      return s.replace(':', '');
 	    }
 
-	    function i(selection) {
-	        var entity = _entityIDs.length && context.hasEntity(_entityIDs[0]);
-	        var preset = entity && _mainPresetIndex.match(entity, context.graph());
-	        var isLocked = preset && preset.suggestion && field.id === 'brand';
-	        field.locked(isLocked);
+	    wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    var div = wrap.selectAll('ul').data([0]);
+	    div = div.enter().append('ul').attr('class', 'rows').merge(div);
+	    var keys = ['cycleway:left', 'cycleway:right'];
+	    items = div.selectAll('li').data(keys);
+	    var enter = items.enter().append('li').attr('class', function (d) {
+	      return 'labeled-input preset-cycleway-' + stripcolon(d);
+	    });
+	    enter.append('span').attr('class', 'label preset-label-cycleway').attr('for', function (d) {
+	      return 'preset-input-cycleway-' + stripcolon(d);
+	    }).html(function (d) {
+	      return field.t.html('types.' + d);
+	    });
+	    enter.append('div').attr('class', 'preset-input-cycleway-wrap').append('input').attr('type', 'text').attr('class', function (d) {
+	      return 'preset-input-cycleway preset-input-' + stripcolon(d);
+	    }).call(utilNoAuto).each(function (d) {
+	      select(this).call(uiCombobox(context, 'cycleway-' + stripcolon(d)).data(cycleway.options(d)));
+	    });
+	    items = items.merge(enter); // Update
 
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	    wrap.selectAll('.preset-input-cycleway').on('change', change).on('blur', change);
+	  }
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
+	  function change(d3_event, key) {
+	    var newValue = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string
 
-	        input = wrap.selectAll('input')
-	            .data([0]);
+	    if (!newValue && (Array.isArray(_tags.cycleway) || Array.isArray(_tags[key]))) return;
 
-	        input = input.enter()
-	            .append('input')
-	            .attr('type', field.type === 'identifier' ? 'text' : field.type)
-	            .attr('id', field.domId)
-	            .classed(field.type, true)
-	            .call(utilNoAuto)
-	            .merge(input);
+	    if (newValue === 'none' || newValue === '') {
+	      newValue = undefined;
+	    }
 
-	        input
-	            .classed('disabled', !!isLocked)
-	            .attr('readonly', isLocked || null)
-	            .on('input', change(true))
-	            .on('blur', change())
-	            .on('change', change());
+	    var otherKey = key === 'cycleway:left' ? 'cycleway:right' : 'cycleway:left';
+	    var otherValue = typeof _tags.cycleway === 'string' ? _tags.cycleway : _tags[otherKey];
 
+	    if (otherValue && Array.isArray(otherValue)) {
+	      // we must always have an explicit value for comparison
+	      otherValue = otherValue[0];
+	    }
 
-	        if (field.type === 'tel') {
-	            updatePhonePlaceholder();
+	    if (otherValue === 'none' || otherValue === '') {
+	      otherValue = undefined;
+	    }
 
-	        } else if (field.type === 'number') {
-	            var rtl = (_mainLocalizer.textDirection() === 'rtl');
+	    var tag = {}; // If the left and right tags match, use the cycleway tag to tag both
+	    // sides the same way
 
-	            input.attr('type', 'text');
+	    if (newValue === otherValue) {
+	      tag = {
+	        cycleway: newValue,
+	        'cycleway:left': undefined,
+	        'cycleway:right': undefined
+	      };
+	    } else {
+	      // Always set both left and right as changing one can affect the other
+	      tag = {
+	        cycleway: undefined
+	      };
+	      tag[key] = newValue;
+	      tag[otherKey] = otherValue;
+	    }
 
-	            var buttons = wrap.selectAll('.increment, .decrement')
-	                .data(rtl ? [1, -1] : [-1, 1]);
+	    dispatch.call('change', this, tag);
+	  }
 
-	            buttons.enter()
-	                .append('button')
-	                .attr('tabindex', -1)
-	                .attr('class', function(d) {
-	                    var which = (d === 1 ? 'increment' : 'decrement');
-	                    return 'form-field-button ' + which;
-	                })
-	                .merge(buttons)
-	                .on('click', function(d) {
-	                    event.preventDefault();
-	                    var raw_vals = input.node().value || '0';
-	                    var vals = raw_vals.split(';');
-	                    vals = vals.map(function(v) {
-	                        var num = parseFloat(v.trim(), 10);
-	                        return isFinite(num) ? clamped(num + d) : v.trim();
-	                    });
-	                    input.node().value = vals.join(';');
-	                    change()();
-	                });
-	        } else if (field.type === 'identifier' && field.urlFormat && field.pattern) {
+	  cycleway.options = function () {
+	    return field.options.map(function (option) {
+	      return {
+	        title: field.t('options.' + option + '.description'),
+	        value: option
+	      };
+	    });
+	  };
 
-	            input.attr('type', 'text');
+	  cycleway.tags = function (tags) {
+	    _tags = tags; // If cycleway is set, use that instead of individual values
 
-	            outlinkButton = wrap.selectAll('.foreign-id-permalink')
-	                .data([0]);
+	    var commonValue = typeof tags.cycleway === 'string' && tags.cycleway;
+	    utilGetSetValue(items.selectAll('.preset-input-cycleway'), function (d) {
+	      if (commonValue) return commonValue;
+	      return !tags.cycleway && typeof tags[d] === 'string' ? tags[d] : '';
+	    }).attr('title', function (d) {
+	      if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
+	        var vals = [];
 
-	            outlinkButton.enter()
-	                .append('button')
-	                .attr('tabindex', -1)
-	                .call(svgIcon('#iD-icon-out-link'))
-	                .attr('class', 'form-field-button foreign-id-permalink')
-	                .attr('title', function() {
-	                    var domainResults = /^https?:\/\/(.{1,}?)\//.exec(field.urlFormat);
-	                    if (domainResults.length >= 2 && domainResults[1]) {
-	                        var domain = domainResults[1];
-	                        return _t('icons.view_on', { domain: domain });
-	                    }
-	                    return '';
-	                })
-	                .on('click', function() {
-	                    event.preventDefault();
+	        if (Array.isArray(tags.cycleway)) {
+	          vals = vals.concat(tags.cycleway);
+	        }
 
-	                    var value = validIdentifierValueForLink();
-	                    if (value) {
-	                        var url = field.urlFormat.replace(/{value}/, encodeURIComponent(value));
-	                        window.open(url, '_blank');
-	                    }
-	                })
-	                .merge(outlinkButton);
+	        if (Array.isArray(tags[d])) {
+	          vals = vals.concat(tags[d]);
 	        }
-	    }
 
+	        return vals.filter(Boolean).join('\n');
+	      }
+
+	      return null;
+	    }).attr('placeholder', function (d) {
+	      if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
+	        return _t('inspector.multiple_values');
+	      }
 
-	    function updatePhonePlaceholder() {
-	        if (input.empty() || !Object.keys(_phoneFormats).length) { return; }
+	      return field.placeholder();
+	    }).classed('mixed', function (d) {
+	      return Array.isArray(tags.cycleway) || Array.isArray(tags[d]);
+	    });
+	  };
 
-	        var extent = combinedEntityExtent();
-	        var countryCode = extent && iso1A2Code(extent.center());
-	        var format = countryCode && _phoneFormats[countryCode.toLowerCase()];
-	        if (format) { input.attr('placeholder', format); }
-	    }
+	  cycleway.focus = function () {
+	    var node = wrap.selectAll('input').node();
+	    if (node) node.focus();
+	  };
 
+	  return utilRebind(cycleway, dispatch, 'on');
+	}
 
-	    function validIdentifierValueForLink() {
-	        if (field.type === 'identifier' && field.pattern) {
-	            var value = utilGetSetValue(input).trim().split(';')[0];
-	            return value && value.match(new RegExp(field.pattern));
-	        }
-	        return null;
-	    }
+	function uiFieldLanes(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var LANE_WIDTH = 40;
+	  var LANE_HEIGHT = 200;
+	  var _entityIDs = [];
 
+	  function lanes(selection) {
+	    var lanesData = context.entity(_entityIDs[0]).lanes();
 
-	    // clamp number to min/max
-	    function clamped(num) {
-	        if (field.minValue !== undefined) {
-	            num = Math.max(num, field.minValue);
-	        }
-	        if (field.maxValue !== undefined) {
-	            num = Math.min(num, field.maxValue);
-	        }
-	        return num;
+	    if (!context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode) {
+	      selection.call(lanes.off);
+	      return;
 	    }
 
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    var surface = wrap.selectAll('.surface').data([0]);
+	    var d = utilGetDimensions(wrap);
+	    var freeSpace = d[0] - lanesData.lanes.length * LANE_WIDTH * 1.5 + LANE_WIDTH * 0.5;
+	    surface = surface.enter().append('svg').attr('width', d[0]).attr('height', 300).attr('class', 'surface').merge(surface);
+	    var lanesSelection = surface.selectAll('.lanes').data([0]);
+	    lanesSelection = lanesSelection.enter().append('g').attr('class', 'lanes').merge(lanesSelection);
+	    lanesSelection.attr('transform', function () {
+	      return 'translate(' + freeSpace / 2 + ', 0)';
+	    });
+	    var lane = lanesSelection.selectAll('.lane').data(lanesData.lanes);
+	    lane.exit().remove();
+	    var enter = lane.enter().append('g').attr('class', 'lane');
+	    enter.append('g').append('rect').attr('y', 50).attr('width', LANE_WIDTH).attr('height', LANE_HEIGHT);
+	    enter.append('g').attr('class', 'forward').append('text').attr('y', 40).attr('x', 14).html('▲');
+	    enter.append('g').attr('class', 'bothways').append('text').attr('y', 40).attr('x', 14).html('▲▼');
+	    enter.append('g').attr('class', 'backward').append('text').attr('y', 40).attr('x', 14).html('▼');
+	    lane = lane.merge(enter);
+	    lane.attr('transform', function (d) {
+	      return 'translate(' + LANE_WIDTH * d.index * 1.5 + ', 0)';
+	    });
+	    lane.select('.forward').style('visibility', function (d) {
+	      return d.direction === 'forward' ? 'visible' : 'hidden';
+	    });
+	    lane.select('.bothways').style('visibility', function (d) {
+	      return d.direction === 'bothways' ? 'visible' : 'hidden';
+	    });
+	    lane.select('.backward').style('visibility', function (d) {
+	      return d.direction === 'backward' ? 'visible' : 'hidden';
+	    });
+	  }
 
-	    function change(onInput) {
-	        return function() {
-	            var t = {};
-	            var val = utilGetSetValue(input);
-	            if (!onInput) { val = context.cleanTagValue(val); }
-
-	            // don't override multiple values with blank string
-	            if (!val && Array.isArray(_tags[field.key])) { return; }
-
-	            if (!onInput) {
-	                if (field.type === 'number' && val) {
-	                    var vals = val.split(';');
-	                    vals = vals.map(function(v) {
-	                        var num = parseFloat(v.trim(), 10);
-	                        return isFinite(num) ? clamped(num) : v.trim();
-	                    });
-	                    val = vals.join(';');
-	                }
-	                utilGetSetValue(input, val);
-	            }
-	            t[field.key] = val || undefined;
-	            dispatch$1.call('change', this, t, onInput);
-	        };
-	    }
+	  lanes.entityIDs = function (val) {
+	    _entityIDs = val;
+	  };
 
+	  lanes.tags = function () {};
 
-	    i.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return i;
-	    };
+	  lanes.focus = function () {};
 
+	  lanes.off = function () {};
 
-	    i.tags = function(tags) {
-	        _tags = tags;
+	  return utilRebind(lanes, dispatch, 'on');
+	}
+	uiFieldLanes.supportsMultiselection = false;
 
-	        var isMixed = Array.isArray(tags[field.key]);
+	var _languagesArray = [];
+	function uiFieldLocalized(field, context) {
+	  var dispatch = dispatch$8('change', 'input');
+	  var wikipedia = services.wikipedia;
+	  var input = select(null);
+	  var localizedInputs = select(null);
 
-	        utilGetSetValue(input, !isMixed && tags[field.key] ? tags[field.key] : '')
-	            .attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined)
-	            .attr('placeholder', isMixed ? _t('inspector.multiple_values') : (field.placeholder() || _t('inspector.unknown')))
-	            .classed('mixed', isMixed);
+	  var _countryCode;
 
-	        if (outlinkButton && !outlinkButton.empty()) {
-	            var disabled = !validIdentifierValueForLink();
-	            outlinkButton.classed('disabled', disabled);
-	        }
-	    };
+	  var _tags; // A concern here in switching to async data means that _languagesArray will not
+	  // be available the first time through, so things like the fetchers and
+	  // the language() function will not work immediately.
 
 
-	    i.focus = function() {
-	        var node = input.node();
-	        if (node) { node.focus(); }
-	    };
+	  _mainFileFetcher.get('languages').then(loadLanguagesArray)["catch"](function () {
+	    /* ignore */
+	  });
+	  var _territoryLanguages = {};
+	  _mainFileFetcher.get('territory_languages').then(function (d) {
+	    _territoryLanguages = d;
+	  })["catch"](function () {
+	    /* ignore */
+	  }); // reuse these combos
 
-	    function combinedEntityExtent() {
-	        return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
-	    }
+	  var langCombo = uiCombobox(context, 'localized-lang').fetcher(fetchLanguages).minItems(0);
 
-	    return utilRebind(i, dispatch$1, 'on');
-	}
+	  var _selection = select(null);
 
-	function uiFieldAccess(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var items = select(null);
-	    var _tags;
+	  var _multilingual = [];
 
-	    function access(selection) {
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	  var _buttonTip = uiTooltip().title(_t.html('translate.translate')).placement('left');
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
+	  var _wikiTitles;
+
+	  var _entityIDs = [];
 
-	        var list = wrap.selectAll('ul')
-	            .data([0]);
+	  function loadLanguagesArray(dataLanguages) {
+	    if (_languagesArray.length !== 0) return; // some conversion is needed to ensure correct OSM tags are used
 
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'rows')
-	            .merge(list);
+	    var replacements = {
+	      sr: 'sr-Cyrl',
+	      // in OSM, `sr` implies Cyrillic
+	      'sr-Cyrl': false // `sr-Cyrl` isn't used in OSM
 
+	    };
 
-	        items = list.selectAll('li')
-	            .data(field.keys);
+	    for (var code in dataLanguages) {
+	      if (replacements[code] === false) continue;
+	      var metaCode = code;
+	      if (replacements[code]) metaCode = replacements[code];
 
-	        // Enter
-	        var enter = items.enter()
-	            .append('li')
-	            .attr('class', function(d) { return 'labeled-input preset-access-' + d; });
+	      _languagesArray.push({
+	        localName: _mainLocalizer.languageName(metaCode, {
+	          localOnly: true
+	        }),
+	        nativeName: dataLanguages[metaCode].nativeName,
+	        code: code,
+	        label: _mainLocalizer.languageName(metaCode)
+	      });
+	    }
+	  }
 
-	        enter
-	            .append('span')
-	            .attr('class', 'label preset-label-access')
-	            .attr('for', function(d) { return 'preset-input-access-' + d; })
-	            .text(function(d) { return field.t('types.' + d); });
+	  function calcLocked() {
+	    // Protect name field for suggestion presets that don't display a brand/operator field
+	    var isLocked = field.id === 'name' && _entityIDs.length && _entityIDs.some(function (entityID) {
+	      var entity = context.graph().hasEntity(entityID);
+	      if (!entity) return false; // Features linked to Wikidata are likely important and should be protected
 
-	        enter
-	            .append('div')
-	            .attr('class', 'preset-input-access-wrap')
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('class', function(d) { return 'preset-input-access preset-input-access-' + d; })
-	            .call(utilNoAuto)
-	            .each(function(d) {
-	                select(this)
-	                    .call(uiCombobox(context, 'access-' + d)
-	                        .data(access.options(d))
-	                    );
-	            });
+	      if (entity.tags.wikidata) return true; // Assume the name has already been confirmed if its source has been researched
 
+	      if (entity.tags['name:etymology:wikidata']) return true; // Lock the `name` if this is a suggestion preset that assigns the name,
+	      // and the preset does not display a `brand` or `operator` field.
+	      // (For presets like hotels, car dealerships, post offices, the `name` should remain editable)
+	      // see also similar logic in `outdated_tags.js`
 
-	        // Update
-	        items = items.merge(enter);
+	      var preset = _mainPresetIndex.match(entity, context.graph());
 
-	        wrap.selectAll('.preset-input-access')
-	            .on('change', change)
-	            .on('blur', change);
-	    }
+	      if (preset) {
+	        var isSuggestion = preset.suggestion;
+	        var fields = preset.fields();
+	        var showsBrandField = fields.some(function (d) {
+	          return d.id === 'brand';
+	        });
+	        var showsOperatorField = fields.some(function (d) {
+	          return d.id === 'operator';
+	        });
+	        var setsName = preset.addTags.name;
+	        var setsBrandWikidata = preset.addTags['brand:wikidata'];
+	        var setsOperatorWikidata = preset.addTags['operator:wikidata'];
+	        return isSuggestion && setsName && (setsBrandWikidata && !showsBrandField || setsOperatorWikidata && !showsOperatorField);
+	      }
 
+	      return false;
+	    });
 
-	    function change(d) {
-	        var tag = {};
-	        var value = context.cleanTagValue(utilGetSetValue(select(this)));
+	    field.locked(isLocked);
+	  } // update _multilingual, maintaining the existing order
 
-	        // don't override multiple values with blank string
-	        if (!value && typeof _tags[d] !== 'string') { return; }
 
-	        tag[d] = value || undefined;
-	        dispatch$1.call('change', this, tag);
-	    }
+	  function calcMultilingual(tags) {
+	    var existingLangsOrdered = _multilingual.map(function (item) {
+	      return item.lang;
+	    });
 
+	    var existingLangs = new Set(existingLangsOrdered.filter(Boolean));
 
-	    access.options = function(type) {
-	        var options = ['no', 'permissive', 'private', 'permit', 'destination'];
+	    for (var k in tags) {
+	      var m = k.match(/^(.*):(.*)$/);
 
-	        if (type !== 'access') {
-	            options.unshift('yes');
-	            options.push('designated');
+	      if (m && m[1] === field.key && m[2]) {
+	        var item = {
+	          lang: m[2],
+	          value: tags[k]
+	        };
 
-	            if (type === 'bicycle') {
-	                options.push('dismount');
-	            }
+	        if (existingLangs.has(item.lang)) {
+	          // update the value
+	          _multilingual[existingLangsOrdered.indexOf(item.lang)].value = item.value;
+	          existingLangs["delete"](item.lang);
+	        } else {
+	          _multilingual.push(item);
 	        }
+	      }
+	    } // Don't remove items based on deleted tags, since this makes the UI
+	    // disappear unexpectedly when clearing values - #8164
 
-	        return options.map(function(option) {
-	            return {
-	                title: field.t('options.' + option + '.description'),
-	                value: option
-	            };
-	        });
-	    };
 
+	    _multilingual.forEach(function (item) {
+	      if (item.lang && existingLangs.has(item.lang)) {
+	        item.value = '';
+	      }
+	    });
+	  }
 
-	    var placeholdersByHighway = {
-	        footway: {
-	            foot: 'designated',
-	            motor_vehicle: 'no'
-	        },
-	        steps: {
-	            foot: 'yes',
-	            motor_vehicle: 'no',
-	            bicycle: 'no',
-	            horse: 'no'
-	        },
-	        pedestrian: {
-	            foot: 'yes',
-	            motor_vehicle: 'no'
-	        },
-	        cycleway: {
-	            motor_vehicle: 'no',
-	            bicycle: 'designated'
-	        },
-	        bridleway: {
-	            motor_vehicle: 'no',
-	            horse: 'designated'
-	        },
-	        path: {
-	            foot: 'yes',
-	            motor_vehicle: 'no',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        motorway: {
-	            foot: 'no',
-	            motor_vehicle: 'yes',
-	            bicycle: 'no',
-	            horse: 'no'
-	        },
-	        trunk: {
-	            motor_vehicle: 'yes'
-	        },
-	        primary: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        secondary: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        tertiary: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        residential: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        unclassified: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        service: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        motorway_link: {
-	            foot: 'no',
-	            motor_vehicle: 'yes',
-	            bicycle: 'no',
-	            horse: 'no'
-	        },
-	        trunk_link: {
-	            motor_vehicle: 'yes'
-	        },
-	        primary_link: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        secondary_link: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        tertiary_link: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        }
-	    };
+	  function localized(selection) {
+	    _selection = selection;
+	    calcLocked();
+	    var isLocked = field.locked();
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]); // enter/update
 
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    input = wrap.selectAll('.localized-main').data([0]); // enter/update
 
-	    access.tags = function(tags) {
-	        _tags = tags;
-
-	        utilGetSetValue(items.selectAll('.preset-input-access'), function(d) {
-	                return typeof tags[d] === 'string' ? tags[d] : '';
-	            })
-	            .classed('mixed', function(d) {
-	                return tags[d] && Array.isArray(tags[d]);
-	            })
-	            .attr('title', function(d) {
-	                return tags[d] && Array.isArray(tags[d]) && tags[d].filter(Boolean).join('\n');
-	            })
-	            .attr('placeholder', function(d) {
-	                if (tags[d] && Array.isArray(tags[d])) {
-	                    return _t('inspector.multiple_values');
-	                }
-	                if (d === 'access') {
-	                    return 'yes';
-	                }
-	                if (tags.access && typeof tags.access === 'string') {
-	                    return tags.access;
-	                }
-	                if (tags.highway) {
-	                    if (typeof tags.highway === 'string') {
-	                        if (placeholdersByHighway[tags.highway] &&
-	                            placeholdersByHighway[tags.highway][d]) {
+	    input = input.enter().append('input').attr('type', 'text').attr('id', field.domId).attr('class', 'localized-main').call(utilNoAuto).merge(input);
+	    input.classed('disabled', !!isLocked).attr('readonly', isLocked || null).on('input', change(true)).on('blur', change()).on('change', change());
+	    var translateButton = wrap.selectAll('.localized-add').data([0]);
+	    translateButton = translateButton.enter().append('button').attr('class', 'localized-add form-field-button').call(svgIcon('#iD-icon-plus')).merge(translateButton);
+	    translateButton.classed('disabled', !!isLocked).call(isLocked ? _buttonTip.destroy : _buttonTip).on('click', addNew);
 
-	                            return placeholdersByHighway[tags.highway][d];
-	                        }
-	                    } else {
-	                        var impliedAccesses = tags.highway.filter(Boolean).map(function(highwayVal) {
-	                            return placeholdersByHighway[highwayVal] && placeholdersByHighway[highwayVal][d];
-	                        }).filter(Boolean);
-
-	                        if (impliedAccesses.length === tags.highway.length &&
-	                            new Set(impliedAccesses).size === 1) {
-	                            // if all the highway values have the same implied access for this type then use that
-	                            return impliedAccesses[0];
-	                        }
-	                    }
-	                }
-	                return field.placeholder();
-	            });
-	    };
+	    if (_tags && !_multilingual.length) {
+	      calcMultilingual(_tags);
+	    }
 
+	    localizedInputs = selection.selectAll('.localized-multilingual').data([0]);
+	    localizedInputs = localizedInputs.enter().append('div').attr('class', 'localized-multilingual').merge(localizedInputs);
+	    localizedInputs.call(renderMultilingual);
+	    localizedInputs.selectAll('button, input').classed('disabled', !!isLocked).attr('readonly', isLocked || null);
 
-	    access.focus = function() {
-	        items.selectAll('.preset-input-access')
-	            .node().focus();
-	    };
+	    function addNew(d3_event) {
+	      d3_event.preventDefault();
+	      if (field.locked()) return;
+	      var defaultLang = _mainLocalizer.languageCode().toLowerCase();
 
+	      var langExists = _multilingual.find(function (datum) {
+	        return datum.lang === defaultLang;
+	      });
 
-	    return utilRebind(access, dispatch$1, 'on');
-	}
+	      var isLangEn = defaultLang.indexOf('en') > -1;
 
-	function uiFieldAddress(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var _selection = select(null);
-	    var _wrap = select(null);
-	    var addrField = _mainPresetIndex.field('address');   // needed for placeholder strings
-
-	    var _entityIDs = [];
-	    var _tags;
-	    var _countryCode;
-	    var _addressFormats = [{
-	        format: [
-	            ['housenumber', 'street'],
-	            ['city', 'postcode']
-	        ]
-	      }];
+	      if (isLangEn || langExists) {
+	        defaultLang = '';
+	        langExists = _multilingual.find(function (datum) {
+	          return datum.lang === defaultLang;
+	        });
+	      }
 
-	    _mainFileFetcher.get('address_formats')
-	        .then(function(d) {
-	            _addressFormats = d;
-	            if (!_selection.empty()) {
-	                _selection.call(address);
-	            }
-	        })
-	        .catch(function() { /* ignore */ });
-
-
-	    function getNearStreets() {
-	        var extent = combinedEntityExtent();
-	        var l = extent.center();
-	        var box = geoExtent(l).padByMeters(200);
-
-	        var streets = context.history().intersects(box)
-	            .filter(isAddressable)
-	            .map(function(d) {
-	                var loc = context.projection([
-	                    (extent[0][0] + extent[1][0]) / 2,
-	                    (extent[0][1] + extent[1][1]) / 2
-	                ]);
-	                var choice = geoChooseEdge(context.graph().childNodes(d), loc, context.projection);
-
-	                return {
-	                    title: d.tags.name,
-	                    value: d.tags.name,
-	                    dist: choice.distance
-	                };
-	            })
-	            .sort(function(a, b) {
-	                return a.dist - b.dist;
-	            });
+	      if (!langExists) {
+	        // prepend the value so it appears at the top
+	        _multilingual.unshift({
+	          lang: defaultLang,
+	          value: ''
+	        });
 
-	        return utilArrayUniqBy(streets, 'value');
+	        localizedInputs.call(renderMultilingual);
+	      }
+	    }
 
-	        function isAddressable(d) {
-	            return d.tags.highway && d.tags.name && d.type === 'way';
+	    function change(onInput) {
+	      return function (d3_event) {
+	        if (field.locked()) {
+	          d3_event.preventDefault();
+	          return;
 	        }
-	    }
 
+	        var val = utilGetSetValue(select(this));
+	        if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string
 
-	    function getNearCities() {
-	        var extent = combinedEntityExtent();
-	        var l = extent.center();
-	        var box = geoExtent(l).padByMeters(200);
+	        if (!val && Array.isArray(_tags[field.key])) return;
+	        var t = {};
+	        t[field.key] = val || undefined;
+	        dispatch.call('change', this, t, onInput);
+	      };
+	    }
+	  }
 
-	        var cities = context.history().intersects(box)
-	            .filter(isAddressable)
-	            .map(function(d) {
-	                return {
-	                    title: d.tags['addr:city'] || d.tags.name,
-	                    value: d.tags['addr:city'] || d.tags.name,
-	                    dist: geoSphericalDistance(d.extent(context.graph()).center(), l)
-	                };
-	            })
-	            .sort(function(a, b) {
-	                return a.dist - b.dist;
-	            });
+	  function key(lang) {
+	    return field.key + ':' + lang;
+	  }
 
-	        return utilArrayUniqBy(cities, 'value');
+	  function changeLang(d3_event, d) {
+	    var tags = {}; // make sure unrecognized suffixes are lowercase - #7156
 
+	    var lang = utilGetSetValue(select(this)).toLowerCase();
 
-	        function isAddressable(d) {
-	            if (d.tags.name) {
-	                if (d.tags.admin_level === '8' && d.tags.boundary === 'administrative')
-	                    { return true; }
-	                if (d.tags.border_type === 'city')
-	                    { return true; }
-	                if (d.tags.place === 'city' || d.tags.place === 'town' || d.tags.place === 'village')
-	                    { return true; }
-	            }
+	    var language = _languagesArray.find(function (d) {
+	      return d.label.toLowerCase() === lang || d.localName && d.localName.toLowerCase() === lang || d.nativeName && d.nativeName.toLowerCase() === lang;
+	    });
 
-	            if (d.tags['addr:city'])
-	                { return true; }
+	    if (language) lang = language.code;
 
-	            return false;
-	        }
+	    if (d.lang && d.lang !== lang) {
+	      tags[key(d.lang)] = undefined;
 	    }
 
-	    function getNearValues(key) {
-	        var extent = combinedEntityExtent();
-	        var l = extent.center();
-	        var box = geoExtent(l).padByMeters(200);
-
-	        var results = context.history().intersects(box)
-	            .filter(function hasTag(d) { return _entityIDs.indexOf(d.id) === -1 && d.tags[key]; })
-	            .map(function(d) {
-	                return {
-	                    title: d.tags[key],
-	                    value: d.tags[key],
-	                    dist: geoSphericalDistance(d.extent(context.graph()).center(), l)
-	                };
-	            })
-	            .sort(function(a, b) {
-	                return a.dist - b.dist;
-	            });
+	    var newKey = lang && context.cleanTagKey(key(lang));
+	    var value = utilGetSetValue(select(this.parentNode).selectAll('.localized-value'));
 
-	        return utilArrayUniqBy(results, 'value');
+	    if (newKey && value) {
+	      tags[newKey] = value;
+	    } else if (newKey && _wikiTitles && _wikiTitles[d.lang]) {
+	      tags[newKey] = _wikiTitles[d.lang];
 	    }
 
+	    d.lang = lang;
+	    dispatch.call('change', this, tags);
+	  }
 
-	    function updateForCountryCode() {
+	  function changeValue(d3_event, d) {
+	    if (!d.lang) return;
+	    var value = context.cleanTagValue(utilGetSetValue(select(this))) || undefined; // don't override multiple values with blank string
 
-	        if (!_countryCode) { return; }
+	    if (!value && Array.isArray(d.value)) return;
+	    var t = {};
+	    t[key(d.lang)] = value;
+	    d.value = value;
+	    dispatch.call('change', this, t);
+	  }
 
-	        var addressFormat;
-	        for (var i = 0; i < _addressFormats.length; i++) {
-	            var format = _addressFormats[i];
-	            if (!format.countryCodes) {
-	                addressFormat = format;   // choose the default format, keep going
-	            } else if (format.countryCodes.indexOf(_countryCode) !== -1) {
-	                addressFormat = format;   // choose the country format, stop here
-	                break;
-	            }
-	        }
+	  function fetchLanguages(value, cb) {
+	    var v = value.toLowerCase(); // show the user's language first
 
-	        var dropdowns = addressFormat.dropdowns || [
-	            'city', 'county', 'country', 'district', 'hamlet',
-	            'neighbourhood', 'place', 'postcode', 'province',
-	            'quarter', 'state', 'street', 'subdistrict', 'suburb'
-	        ];
+	    var langCodes = [_mainLocalizer.localeCode(), _mainLocalizer.languageCode()];
 
-	        var widths = addressFormat.widths || {
-	            housenumber: 1/3, street: 2/3,
-	            city: 2/3, state: 1/4, postcode: 1/3
-	        };
+	    if (_countryCode && _territoryLanguages[_countryCode]) {
+	      langCodes = langCodes.concat(_territoryLanguages[_countryCode]);
+	    }
 
-	        function row(r) {
-	            // Normalize widths.
-	            var total = r.reduce(function(sum, key) {
-	                return sum + (widths[key] || 0.5);
-	            }, 0);
+	    var langItems = [];
+	    langCodes.forEach(function (code) {
+	      var langItem = _languagesArray.find(function (item) {
+	        return item.code === code;
+	      });
 
-	            return r.map(function(key) {
-	                return {
-	                    id: key,
-	                    width: (widths[key] || 0.5) / total
-	                };
-	            });
+	      if (langItem) langItems.push(langItem);
+	    });
+	    langItems = utilArrayUniq(langItems.concat(_languagesArray));
+	    cb(langItems.filter(function (d) {
+	      return d.label.toLowerCase().indexOf(v) >= 0 || d.localName && d.localName.toLowerCase().indexOf(v) >= 0 || d.nativeName && d.nativeName.toLowerCase().indexOf(v) >= 0 || d.code.toLowerCase().indexOf(v) >= 0;
+	    }).map(function (d) {
+	      return {
+	        value: d.label
+	      };
+	    }));
+	  }
+
+	  function renderMultilingual(selection) {
+	    var entries = selection.selectAll('div.entry').data(_multilingual, function (d) {
+	      return d.lang;
+	    });
+	    entries.exit().style('top', '0').style('max-height', '240px').transition().duration(200).style('opacity', '0').style('max-height', '0px').remove();
+	    var entriesEnter = entries.enter().append('div').attr('class', 'entry').each(function (_, index) {
+	      var wrap = select(this);
+	      var domId = utilUniqueDomId(index);
+	      var label = wrap.append('label').attr('class', 'field-label').attr('for', domId);
+	      var text = label.append('span').attr('class', 'label-text');
+	      text.append('span').attr('class', 'label-textvalue').html(_t.html('translate.localized_translation_label'));
+	      text.append('span').attr('class', 'label-textannotation');
+	      label.append('button').attr('class', 'remove-icon-multilingual').on('click', function (d3_event, d) {
+	        if (field.locked()) return;
+	        d3_event.preventDefault(); // remove the UI item manually
+
+	        _multilingual.splice(_multilingual.indexOf(d), 1);
+
+	        var langKey = d.lang && key(d.lang);
+
+	        if (langKey && langKey in _tags) {
+	          delete _tags[langKey]; // remove from entity tags
+
+	          var t = {};
+	          t[langKey] = undefined;
+	          dispatch.call('change', this, t);
+	          return;
 	        }
 
-	        var rows = _wrap.selectAll('.addr-row')
-	            .data(addressFormat.format, function(d) {
-	                return d.toString();
-	            });
+	        renderMultilingual(selection);
+	      }).call(svgIcon('#iD-operation-delete'));
+	      wrap.append('input').attr('class', 'localized-lang').attr('id', domId).attr('type', 'text').attr('placeholder', _t('translate.localized_translation_language')).on('blur', changeLang).on('change', changeLang).call(langCombo);
+	      wrap.append('input').attr('type', 'text').attr('class', 'localized-value').on('blur', changeValue).on('change', changeValue);
+	    });
+	    entriesEnter.style('margin-top', '0px').style('max-height', '0px').style('opacity', '0').transition().duration(200).style('margin-top', '10px').style('max-height', '240px').style('opacity', '1').on('end', function () {
+	      select(this).style('max-height', '').style('overflow', 'visible');
+	    });
+	    entries = entries.merge(entriesEnter);
+	    entries.order(); // allow removing the entry UIs even if there isn't a tag to remove
 
-	        rows.exit()
-	            .remove();
+	    entries.classed('present', true);
+	    utilGetSetValue(entries.select('.localized-lang'), function (d) {
+	      var langItem = _languagesArray.find(function (item) {
+	        return item.code === d.lang;
+	      });
 
-	        rows
-	            .enter()
-	            .append('div')
-	            .attr('class', 'addr-row')
-	            .selectAll('input')
-	            .data(row)
-	            .enter()
-	            .append('input')
-	            .property('type', 'text')
-	            .call(updatePlaceholder)
-	            .attr('class', function (d) { return 'addr-' + d.id; })
-	            .call(utilNoAuto)
-	            .each(addDropdown)
-	            .style('width', function (d) { return d.width * 100 + '%'; });
-
-
-	        function addDropdown(d) {
-	            if (dropdowns.indexOf(d.id) === -1) { return; }  // not a dropdown
-
-	            var nearValues = (d.id === 'street') ? getNearStreets
-	                : (d.id === 'city') ? getNearCities
-	                : getNearValues;
-
-	            select(this)
-	                .call(uiCombobox(context, 'address-' + d.id)
-	                    .minItems(1)
-	                    .caseSensitive(true)
-	                    .fetcher(function(value, callback) {
-	                        callback(nearValues('addr:' + d.id));
-	                    })
-	                );
-	        }
+	      if (langItem) return langItem.label;
+	      return d.lang;
+	    });
+	    utilGetSetValue(entries.select('.localized-value'), function (d) {
+	      return typeof d.value === 'string' ? d.value : '';
+	    }).attr('title', function (d) {
+	      return Array.isArray(d.value) ? d.value.filter(Boolean).join('\n') : null;
+	    }).attr('placeholder', function (d) {
+	      return Array.isArray(d.value) ? _t('inspector.multiple_values') : _t('translate.localized_translation_name');
+	    }).classed('mixed', function (d) {
+	      return Array.isArray(d.value);
+	    });
+	  }
 
-	        _wrap.selectAll('input')
-	            .on('blur', change())
-	            .on('change', change());
+	  localized.tags = function (tags) {
+	    _tags = tags; // Fetch translations from wikipedia
 
-	        _wrap.selectAll('input:not(.combobox-input)')
-	            .on('input', change(true));
+	    if (typeof tags.wikipedia === 'string' && !_wikiTitles) {
+	      _wikiTitles = {};
+	      var wm = tags.wikipedia.match(/([^:]+):(.+)/);
 
-	        if (_tags) { updateTags(_tags); }
+	      if (wm && wm[0] && wm[1]) {
+	        wikipedia.translations(wm[1], wm[2], function (err, d) {
+	          if (err || !d) return;
+	          _wikiTitles = d;
+	        });
+	      }
 	    }
 
+	    var isMixed = Array.isArray(tags[field.key]);
+	    utilGetSetValue(input, typeof tags[field.key] === 'string' ? tags[field.key] : '').attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder()).classed('mixed', isMixed);
+	    calcMultilingual(tags);
 
-	    function address(selection) {
-	        _selection = selection;
-
-	        _wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	    _selection.call(localized);
+	  };
 
-	        _wrap = _wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(_wrap);
+	  localized.focus = function () {
+	    input.node().focus();
+	  };
 
-	        var extent = combinedEntityExtent();
+	  localized.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    _multilingual = [];
+	    loadCountryCode();
+	    return localized;
+	  };
 
-	        if (extent) {
-	            var countryCode;
-	            if (context.inIntro()) {
-	                // localize the address format for the walkthrough
-	                countryCode = _t('intro.graph.countrycode');
-	            } else {
-	                var center = extent.center();
-	                countryCode = iso1A2Code(center);
-	            }
-	            if (countryCode) {
-	                _countryCode = countryCode.toLowerCase();
-	                updateForCountryCode();
-	            }
-	        }
-	    }
+	  function loadCountryCode() {
+	    var extent = combinedEntityExtent();
+	    var countryCode = extent && iso1A2Code(extent.center());
+	    _countryCode = countryCode && countryCode.toLowerCase();
+	  }
 
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	  }
 
-	    function change(onInput) {
-	        return function() {
-	            var tags = {};
+	  return utilRebind(localized, dispatch, 'on');
+	}
 
-	            _wrap.selectAll('input')
-	                .each(function (subfield) {
-	                    var key = field.key + ':' + subfield.id;
+	function uiFieldRoadheight(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var primaryUnitInput = select(null);
+	  var primaryInput = select(null);
+	  var secondaryInput = select(null);
+	  var secondaryUnitInput = select(null);
+	  var _entityIDs = [];
 
-	                    var value = this.value;
-	                    if (!onInput) { value = context.cleanTagValue(value); }
+	  var _tags;
 
-	                    // don't override multiple values with blank string
-	                    if (Array.isArray(_tags[key]) && !value) { return; }
+	  var _isImperial;
 
-	                    tags[key] = value || undefined;
-	                });
+	  var primaryUnits = [{
+	    value: 'm',
+	    title: _t('inspector.roadheight.meter')
+	  }, {
+	    value: 'ft',
+	    title: _t('inspector.roadheight.foot')
+	  }];
+	  var unitCombo = uiCombobox(context, 'roadheight-unit').data(primaryUnits);
+
+	  function roadheight(selection) {
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    primaryInput = wrap.selectAll('input.roadheight-number').data([0]);
+	    primaryInput = primaryInput.enter().append('input').attr('type', 'text').attr('class', 'roadheight-number').attr('id', field.domId).call(utilNoAuto).merge(primaryInput);
+	    primaryInput.on('change', change).on('blur', change);
+	    var loc = combinedEntityExtent().center();
+	    _isImperial = roadHeightUnit(loc) === 'ft';
+	    primaryUnitInput = wrap.selectAll('input.roadheight-unit').data([0]);
+	    primaryUnitInput = primaryUnitInput.enter().append('input').attr('type', 'text').attr('class', 'roadheight-unit').call(unitCombo).merge(primaryUnitInput);
+	    primaryUnitInput.on('blur', changeUnits).on('change', changeUnits);
+	    secondaryInput = wrap.selectAll('input.roadheight-secondary-number').data([0]);
+	    secondaryInput = secondaryInput.enter().append('input').attr('type', 'text').attr('class', 'roadheight-secondary-number').call(utilNoAuto).merge(secondaryInput);
+	    secondaryInput.on('change', change).on('blur', change);
+	    secondaryUnitInput = wrap.selectAll('input.roadheight-secondary-unit').data([0]);
+	    secondaryUnitInput = secondaryUnitInput.enter().append('input').attr('type', 'text').call(utilNoAuto).classed('disabled', true).classed('roadheight-secondary-unit', true).attr('readonly', 'readonly').merge(secondaryUnitInput);
+
+	    function changeUnits() {
+	      _isImperial = utilGetSetValue(primaryUnitInput) === 'ft';
+	      utilGetSetValue(primaryUnitInput, _isImperial ? 'ft' : 'm');
+	      setUnitSuggestions();
+	      change();
+	    }
+	  }
+
+	  function setUnitSuggestions() {
+	    utilGetSetValue(primaryUnitInput, _isImperial ? 'ft' : 'm');
+	  }
+
+	  function change() {
+	    var tag = {};
+	    var primaryValue = utilGetSetValue(primaryInput).trim();
+	    var secondaryValue = utilGetSetValue(secondaryInput).trim(); // don't override multiple values with blank string
+
+	    if (!primaryValue && !secondaryValue && Array.isArray(_tags[field.key])) return;
+
+	    if (!primaryValue && !secondaryValue) {
+	      tag[field.key] = undefined;
+	    } else if (isNaN(primaryValue) || isNaN(secondaryValue) || !_isImperial) {
+	      tag[field.key] = context.cleanTagValue(primaryValue);
+	    } else {
+	      if (primaryValue !== '') {
+	        primaryValue = context.cleanTagValue(primaryValue + '\'');
+	      }
 
-	            dispatch$1.call('change', this, tags, onInput);
-	        };
-	    }
+	      if (secondaryValue !== '') {
+	        secondaryValue = context.cleanTagValue(secondaryValue + '"');
+	      }
 
-	    function updatePlaceholder(inputSelection) {
-	        return inputSelection.attr('placeholder', function(subfield) {
-	            if (_tags && Array.isArray(_tags[field.key + ':' + subfield.id])) {
-	                return _t('inspector.multiple_values');
-	            }
-	            if (_countryCode) {
-	                var localkey = subfield.id + '!' + _countryCode;
-	                var tkey = addrField.strings.placeholders[localkey] ? localkey : subfield.id;
-	                return addrField.t('placeholders.' + tkey);
-	            }
-	        });
+	      tag[field.key] = primaryValue + secondaryValue;
 	    }
 
+	    dispatch.call('change', this, tag);
+	  }
 
-	    function updateTags(tags) {
-	        utilGetSetValue(_wrap.selectAll('input'), function (subfield) {
-	                var val = tags[field.key + ':' + subfield.id];
-	                return typeof val === 'string' ? val : '';
-	            })
-	            .attr('title', function(subfield) {
-	                var val = tags[field.key + ':' + subfield.id];
-	                return val && Array.isArray(val) && val.filter(Boolean).join('\n');
-	            })
-	            .classed('mixed', function(subfield) {
-	                return Array.isArray(tags[field.key + ':' + subfield.id]);
-	            })
-	            .call(updatePlaceholder);
-	    }
+	  roadheight.tags = function (tags) {
+	    _tags = tags;
+	    var primaryValue = tags[field.key];
+	    var secondaryValue;
+	    var isMixed = Array.isArray(primaryValue);
 
+	    if (!isMixed) {
+	      if (primaryValue && (primaryValue.indexOf('\'') >= 0 || primaryValue.indexOf('"') >= 0)) {
+	        secondaryValue = primaryValue.match(/(-?[\d.]+)"/);
 
-	    function combinedEntityExtent() {
-	        return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
-	    }
+	        if (secondaryValue !== null) {
+	          secondaryValue = secondaryValue[1];
+	        }
 
+	        primaryValue = primaryValue.match(/(-?[\d.]+)'/);
 
-	    address.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return address;
-	    };
+	        if (primaryValue !== null) {
+	          primaryValue = primaryValue[1];
+	        }
 
+	        _isImperial = true;
+	      } else if (primaryValue) {
+	        _isImperial = false;
+	      }
+	    }
 
-	    address.tags = function(tags) {
-	        _tags = tags;
-	        updateTags(tags);
-	    };
+	    setUnitSuggestions();
+	    utilGetSetValue(primaryInput, typeof primaryValue === 'string' ? primaryValue : '').attr('title', isMixed ? primaryValue.filter(Boolean).join('\n') : null).attr('placeholder', isMixed ? _t('inspector.multiple_values') : _t('inspector.unknown')).classed('mixed', isMixed);
+	    utilGetSetValue(secondaryInput, typeof secondaryValue === 'string' ? secondaryValue : '').attr('placeholder', isMixed ? _t('inspector.multiple_values') : _isImperial ? '0' : null).classed('mixed', isMixed).classed('disabled', !_isImperial).attr('readonly', _isImperial ? null : 'readonly');
+	    secondaryUnitInput.attr('value', _isImperial ? _t('inspector.roadheight.inch') : null);
+	  };
 
+	  roadheight.focus = function () {
+	    primaryInput.node().focus();
+	  };
 
-	    address.focus = function() {
-	        var node = _wrap.selectAll('input').node();
-	        if (node) { node.focus(); }
-	    };
+	  roadheight.entityIDs = function (val) {
+	    _entityIDs = val;
+	  };
 
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	  }
 
-	    return utilRebind(address, dispatch$1, 'on');
+	  return utilRebind(roadheight, dispatch, 'on');
 	}
 
-	function uiFieldCycleway(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var items = select(null);
-	    var wrap = select(null);
-	    var _tags;
+	function uiFieldRoadspeed(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var unitInput = select(null);
+	  var input = select(null);
+	  var _entityIDs = [];
 
-	    function cycleway(selection) {
+	  var _tags;
 
-	        function stripcolon(s) {
-	            return s.replace(':', '');
-	        }
+	  var _isImperial;
 
+	  var speedCombo = uiCombobox(context, 'roadspeed');
+	  var unitCombo = uiCombobox(context, 'roadspeed-unit').data(['km/h', 'mph'].map(comboValues));
+	  var metricValues = [20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120];
+	  var imperialValues = [5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80];
 
-	        wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	  function roadspeed(selection) {
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    input = wrap.selectAll('input.roadspeed-number').data([0]);
+	    input = input.enter().append('input').attr('type', 'text').attr('class', 'roadspeed-number').attr('id', field.domId).call(utilNoAuto).call(speedCombo).merge(input);
+	    input.on('change', change).on('blur', change);
+	    var loc = combinedEntityExtent().center();
+	    _isImperial = roadSpeedUnit(loc) === 'mph';
+	    unitInput = wrap.selectAll('input.roadspeed-unit').data([0]);
+	    unitInput = unitInput.enter().append('input').attr('type', 'text').attr('class', 'roadspeed-unit').call(unitCombo).merge(unitInput);
+	    unitInput.on('blur', changeUnits).on('change', changeUnits);
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
+	    function changeUnits() {
+	      _isImperial = utilGetSetValue(unitInput) === 'mph';
+	      utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
+	      setUnitSuggestions();
+	      change();
+	    }
+	  }
 
+	  function setUnitSuggestions() {
+	    speedCombo.data((_isImperial ? imperialValues : metricValues).map(comboValues));
+	    utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
+	  }
 
-	        var div = wrap.selectAll('ul')
-	            .data([0]);
+	  function comboValues(d) {
+	    return {
+	      value: d.toString(),
+	      title: d.toString()
+	    };
+	  }
 
-	        div = div.enter()
-	            .append('ul')
-	            .attr('class', 'rows')
-	            .merge(div);
+	  function change() {
+	    var tag = {};
+	    var value = utilGetSetValue(input).trim(); // don't override multiple values with blank string
 
-	        var keys = ['cycleway:left', 'cycleway:right'];
+	    if (!value && Array.isArray(_tags[field.key])) return;
 
-	        items = div.selectAll('li')
-	            .data(keys);
+	    if (!value) {
+	      tag[field.key] = undefined;
+	    } else if (isNaN(value) || !_isImperial) {
+	      tag[field.key] = context.cleanTagValue(value);
+	    } else {
+	      tag[field.key] = context.cleanTagValue(value + ' mph');
+	    }
 
-	        var enter = items.enter()
-	            .append('li')
-	            .attr('class', function(d) { return 'labeled-input preset-cycleway-' + stripcolon(d); });
+	    dispatch.call('change', this, tag);
+	  }
 
-	        enter
-	            .append('span')
-	            .attr('class', 'label preset-label-cycleway')
-	            .attr('for', function(d) { return 'preset-input-cycleway-' + stripcolon(d); })
-	            .text(function(d) { return field.t('types.' + d); });
+	  roadspeed.tags = function (tags) {
+	    _tags = tags;
+	    var value = tags[field.key];
+	    var isMixed = Array.isArray(value);
+
+	    if (!isMixed) {
+	      if (value && value.indexOf('mph') >= 0) {
+	        value = parseInt(value, 10).toString();
+	        _isImperial = true;
+	      } else if (value) {
+	        _isImperial = false;
+	      }
+	    }
 
-	        enter
-	            .append('div')
-	            .attr('class', 'preset-input-cycleway-wrap')
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('class', function(d) { return 'preset-input-cycleway preset-input-' + stripcolon(d); })
-	            .call(utilNoAuto)
-	            .each(function(d) {
-	                select(this)
-	                    .call(uiCombobox(context, 'cycleway-' + stripcolon(d))
-	                        .data(cycleway.options(d))
-	                    );
-	            });
+	    setUnitSuggestions();
+	    utilGetSetValue(input, typeof value === 'string' ? value : '').attr('title', isMixed ? value.filter(Boolean).join('\n') : null).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder()).classed('mixed', isMixed);
+	  };
 
-	        items = items.merge(enter);
+	  roadspeed.focus = function () {
+	    input.node().focus();
+	  };
 
-	        // Update
-	        wrap.selectAll('.preset-input-cycleway')
-	            .on('change', change)
-	            .on('blur', change);
-	    }
+	  roadspeed.entityIDs = function (val) {
+	    _entityIDs = val;
+	  };
 
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	  }
 
-	    function change(key) {
+	  return utilRebind(roadspeed, dispatch, 'on');
+	}
 
-	        var newValue = context.cleanTagValue(utilGetSetValue(select(this)));
+	function uiFieldRadio(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var placeholder = select(null);
+	  var wrap = select(null);
+	  var labels = select(null);
+	  var radios = select(null);
+	  var radioData = (field.options || field.keys).slice(); // shallow copy
+
+	  var typeField;
+	  var layerField;
+	  var _oldType = {};
+	  var _entityIDs = [];
+
+	  function selectedKey() {
+	    var node = wrap.selectAll('.form-field-input-radio label.active input');
+	    return !node.empty() && node.datum();
+	  }
+
+	  function radio(selection) {
+	    selection.classed('preset-radio', true);
+	    wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    var enter = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-radio');
+	    enter.append('span').attr('class', 'placeholder');
+	    wrap = wrap.merge(enter);
+	    placeholder = wrap.selectAll('.placeholder');
+	    labels = wrap.selectAll('label').data(radioData);
+	    enter = labels.enter().append('label');
+	    enter.append('input').attr('type', 'radio').attr('name', field.id).attr('value', function (d) {
+	      return field.t('options.' + d, {
+	        'default': d
+	      });
+	    }).attr('checked', false);
+	    enter.append('span').html(function (d) {
+	      return field.t.html('options.' + d, {
+	        'default': d
+	      });
+	    });
+	    labels = labels.merge(enter);
+	    radios = labels.selectAll('input').on('change', changeRadio);
+	  }
+
+	  function structureExtras(selection, tags) {
+	    var selected = selectedKey() || tags.layer !== undefined;
+	    var type = _mainPresetIndex.field(selected);
+	    var layer = _mainPresetIndex.field('layer');
+	    var showLayer = selected === 'bridge' || selected === 'tunnel' || tags.layer !== undefined;
+	    var extrasWrap = selection.selectAll('.structure-extras-wrap').data(selected ? [0] : []);
+	    extrasWrap.exit().remove();
+	    extrasWrap = extrasWrap.enter().append('div').attr('class', 'structure-extras-wrap').merge(extrasWrap);
+	    var list = extrasWrap.selectAll('ul').data([0]);
+	    list = list.enter().append('ul').attr('class', 'rows').merge(list); // Type
+
+	    if (type) {
+	      if (!typeField || typeField.id !== selected) {
+	        typeField = uiField(context, type, _entityIDs, {
+	          wrap: false
+	        }).on('change', changeType);
+	      }
 
-	        // don't override multiple values with blank string
-	        if (!newValue && (Array.isArray(_tags.cycleway) || Array.isArray(_tags[key]))) { return; }
+	      typeField.tags(tags);
+	    } else {
+	      typeField = null;
+	    }
 
-	        if (newValue === 'none' || newValue === '') { newValue = undefined; }
+	    var typeItem = list.selectAll('.structure-type-item').data(typeField ? [typeField] : [], function (d) {
+	      return d.id;
+	    }); // Exit
 
-	        var otherKey = key === 'cycleway:left' ? 'cycleway:right' : 'cycleway:left';
-	        var otherValue = typeof _tags.cycleway === 'string' ? _tags.cycleway : _tags[otherKey];
-	        if (otherValue && Array.isArray(otherValue)) {
-	            // we must always have an explicit value for comparison
-	            otherValue = otherValue[0];
-	        }
-	        if (otherValue === 'none' || otherValue === '') { otherValue = undefined; }
+	    typeItem.exit().remove(); // Enter
 
-	        var tag = {};
+	    var typeEnter = typeItem.enter().insert('li', ':first-child').attr('class', 'labeled-input structure-type-item');
+	    typeEnter.append('span').attr('class', 'label structure-label-type').attr('for', 'preset-input-' + selected).html(_t.html('inspector.radio.structure.type'));
+	    typeEnter.append('div').attr('class', 'structure-input-type-wrap'); // Update
 
-	        // If the left and right tags match, use the cycleway tag to tag both
-	        // sides the same way
-	        if (newValue === otherValue) {
-	            tag = {
-	                cycleway: newValue,
-	                'cycleway:left': undefined,
-	                'cycleway:right': undefined
-	            };
-	        } else {
-	            // Always set both left and right as changing one can affect the other
-	            tag = {
-	                cycleway: undefined
-	            };
-	            tag[key] = newValue;
-	            tag[otherKey] = otherValue;
-	        }
+	    typeItem = typeItem.merge(typeEnter);
 
-	        dispatch$1.call('change', this, tag);
-	    }
+	    if (typeField) {
+	      typeItem.selectAll('.structure-input-type-wrap').call(typeField.render);
+	    } // Layer
 
 
-	    cycleway.options = function() {
-	        return Object.keys(field.strings.options).map(function(option) {
-	            return {
-	                title: field.t('options.' + option + '.description'),
-	                value: option
-	            };
-	        });
-	    };
+	    if (layer && showLayer) {
+	      if (!layerField) {
+	        layerField = uiField(context, layer, _entityIDs, {
+	          wrap: false
+	        }).on('change', changeLayer);
+	      }
 
+	      layerField.tags(tags);
+	      field.keys = utilArrayUnion(field.keys, ['layer']);
+	    } else {
+	      layerField = null;
+	      field.keys = field.keys.filter(function (k) {
+	        return k !== 'layer';
+	      });
+	    }
 
-	    cycleway.tags = function(tags) {
-	        _tags = tags;
+	    var layerItem = list.selectAll('.structure-layer-item').data(layerField ? [layerField] : []); // Exit
 
-	        // If cycleway is set, use that instead of individual values
-	        var commonValue = typeof tags.cycleway === 'string' && tags.cycleway;
+	    layerItem.exit().remove(); // Enter
 
-	        utilGetSetValue(items.selectAll('.preset-input-cycleway'), function(d) {
-	                if (commonValue) { return commonValue; }
-	                return !tags.cycleway && typeof tags[d] === 'string' ? tags[d] : '';
-	            })
-	            .attr('title', function(d) {
-	                if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
-	                    var vals = [];
-	                    if (Array.isArray(tags.cycleway)) {
-	                        vals = vals.concat(tags.cycleway);
-	                    }
-	                    if (Array.isArray(tags[d])) {
-	                        vals = vals.concat(tags[d]);
-	                    }
-	                    return vals.filter(Boolean).join('\n');
-	                }
-	                return null;
-	            })
-	            .attr('placeholder', function(d) {
-	                if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
-	                    return _t('inspector.multiple_values');
-	                }
-	                return field.placeholder();
-	            })
-	            .classed('mixed', function(d) {
-	                return Array.isArray(tags.cycleway) || Array.isArray(tags[d]);
-	            });
-	    };
+	    var layerEnter = layerItem.enter().append('li').attr('class', 'labeled-input structure-layer-item');
+	    layerEnter.append('span').attr('class', 'label structure-label-layer').attr('for', 'preset-input-layer').html(_t.html('inspector.radio.structure.layer'));
+	    layerEnter.append('div').attr('class', 'structure-input-layer-wrap'); // Update
 
+	    layerItem = layerItem.merge(layerEnter);
 
-	    cycleway.focus = function() {
-	        var node = wrap.selectAll('input').node();
-	        if (node) { node.focus(); }
-	    };
+	    if (layerField) {
+	      layerItem.selectAll('.structure-input-layer-wrap').call(layerField.render);
+	    }
+	  }
 
+	  function changeType(t, onInput) {
+	    var key = selectedKey();
+	    if (!key) return;
+	    var val = t[key];
 
-	    return utilRebind(cycleway, dispatch$1, 'on');
-	}
+	    if (val !== 'no') {
+	      _oldType[key] = val;
+	    }
 
-	function uiFieldLanes(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var LANE_WIDTH = 40;
-	    var LANE_HEIGHT = 200;
-	    var _entityIDs = [];
+	    if (field.type === 'structureRadio') {
+	      // remove layer if it should not be set
+	      if (val === 'no' || key !== 'bridge' && key !== 'tunnel' || key === 'tunnel' && val === 'building_passage') {
+	        t.layer = undefined;
+	      } // add layer if it should be set
 
-	    function lanes(selection) {
-	        var lanesData = context.entity(_entityIDs[0]).lanes();
 
-	        if (!context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode) {
-	            selection.call(lanes.off);
-	            return;
+	      if (t.layer === undefined) {
+	        if (key === 'bridge' && val !== 'no') {
+	          t.layer = '1';
 	        }
 
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	        if (key === 'tunnel' && val !== 'no' && val !== 'building_passage') {
+	          t.layer = '-1';
+	        }
+	      }
+	    }
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
+	    dispatch.call('change', this, t, onInput);
+	  }
 
-	        var surface =  wrap.selectAll('.surface')
-	            .data([0]);
+	  function changeLayer(t, onInput) {
+	    if (t.layer === '0') {
+	      t.layer = undefined;
+	    }
 
-	        var d = utilGetDimensions(wrap);
-	        var freeSpace = d[0] - lanesData.lanes.length * LANE_WIDTH * 1.5 + LANE_WIDTH * 0.5;
+	    dispatch.call('change', this, t, onInput);
+	  }
 
-	        surface = surface.enter()
-	            .append('svg')
-	            .attr('width', d[0])
-	            .attr('height', 300)
-	            .attr('class', 'surface')
-	            .merge(surface);
+	  function changeRadio() {
+	    var t = {};
+	    var activeKey;
 
+	    if (field.key) {
+	      t[field.key] = undefined;
+	    }
 
-	        var lanesSelection = surface.selectAll('.lanes')
-	            .data([0]);
+	    radios.each(function (d) {
+	      var active = select(this).property('checked');
+	      if (active) activeKey = d;
 
-	        lanesSelection = lanesSelection.enter()
-	            .append('g')
-	            .attr('class', 'lanes')
-	            .merge(lanesSelection);
+	      if (field.key) {
+	        if (active) t[field.key] = d;
+	      } else {
+	        var val = _oldType[activeKey] || 'yes';
+	        t[d] = active ? val : undefined;
+	      }
+	    });
 
-	        lanesSelection
-	            .attr('transform', function () {
-	                return 'translate(' + (freeSpace / 2) + ', 0)';
-	            });
+	    if (field.type === 'structureRadio') {
+	      if (activeKey === 'bridge') {
+	        t.layer = '1';
+	      } else if (activeKey === 'tunnel' && t.tunnel !== 'building_passage') {
+	        t.layer = '-1';
+	      } else {
+	        t.layer = undefined;
+	      }
+	    }
 
+	    dispatch.call('change', this, t);
+	  }
 
-	        var lane = lanesSelection.selectAll('.lane')
-	           .data(lanesData.lanes);
-
-	        lane.exit()
-	            .remove();
-
-	        var enter = lane.enter()
-	            .append('g')
-	            .attr('class', 'lane');
-
-	        enter
-	            .append('g')
-	            .append('rect')
-	            .attr('y', 50)
-	            .attr('width', LANE_WIDTH)
-	            .attr('height', LANE_HEIGHT);
-
-	        enter
-	            .append('g')
-	            .attr('class', 'forward')
-	            .append('text')
-	            .attr('y', 40)
-	            .attr('x', 14)
-	            .text('▲');
-
-	        enter
-	            .append('g')
-	            .attr('class', 'bothways')
-	            .append('text')
-	            .attr('y', 40)
-	            .attr('x', 14)
-	            .text('▲▼');
-
-	        enter
-	            .append('g')
-	            .attr('class', 'backward')
-	            .append('text')
-	            .attr('y', 40)
-	            .attr('x', 14)
-	            .text('▼');
-
-
-	        lane = lane
-	            .merge(enter);
-
-	        lane
-	            .attr('transform', function(d) {
-	                return 'translate(' + (LANE_WIDTH * d.index * 1.5) + ', 0)';
-	            });
+	  radio.tags = function (tags) {
+	    radios.property('checked', function (d) {
+	      if (field.key) {
+	        return tags[field.key] === d;
+	      }
 
-	        lane.select('.forward')
-	            .style('visibility', function(d) {
-	                return d.direction === 'forward' ? 'visible' : 'hidden';
-	            });
+	      return !!(typeof tags[d] === 'string' && tags[d].toLowerCase() !== 'no');
+	    });
 
-	        lane.select('.bothways')
-	            .style('visibility', function(d) {
-	                return d.direction === 'bothways' ? 'visible' : 'hidden';
-	            });
+	    function isMixed(d) {
+	      if (field.key) {
+	        return Array.isArray(tags[field.key]) && tags[field.key].includes(d);
+	      }
 
-	        lane.select('.backward')
-	            .style('visibility', function(d) {
-	                return d.direction === 'backward' ? 'visible' : 'hidden';
-	            });
+	      return Array.isArray(tags[d]);
 	    }
 
+	    labels.classed('active', function (d) {
+	      if (field.key) {
+	        return Array.isArray(tags[field.key]) && tags[field.key].includes(d) || tags[field.key] === d;
+	      }
 
-	    lanes.entityIDs = function(val) {
-	        _entityIDs = val;
-	    };
+	      return Array.isArray(tags[d]) || !!(tags[d] && tags[d].toLowerCase() !== 'no');
+	    }).classed('mixed', isMixed).attr('title', function (d) {
+	      return isMixed(d) ? _t('inspector.unshared_value_tooltip') : null;
+	    });
+	    var selection = radios.filter(function () {
+	      return this.checked;
+	    });
 
-	    lanes.tags = function() {};
-	    lanes.focus = function() {};
-	    lanes.off = function() {};
+	    if (selection.empty()) {
+	      placeholder.html(_t.html('inspector.none'));
+	    } else {
+	      placeholder.html(selection.attr('value'));
+	      _oldType[selection.datum()] = tags[selection.datum()];
+	    }
 
-	    return utilRebind(lanes, dispatch$1, 'on');
-	}
+	    if (field.type === 'structureRadio') {
+	      // For waterways without a tunnel tag, set 'culvert' as
+	      // the _oldType to default to if the user picks 'tunnel'
+	      if (!!tags.waterway && !_oldType.tunnel) {
+	        _oldType.tunnel = 'culvert';
+	      }
 
-	uiFieldLanes.supportsMultiselection = false;
+	      wrap.call(structureExtras, tags);
+	    }
+	  };
 
-	var _languagesArray = [];
+	  radio.focus = function () {
+	    radios.node().focus();
+	  };
+
+	  radio.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    _oldType = {};
+	    return radio;
+	  };
 
+	  radio.isAllowed = function () {
+	    return _entityIDs.length === 1;
+	  };
 
-	function uiFieldLocalized(field, context) {
-	    var dispatch$1 = dispatch('change', 'input');
-	    var wikipedia = services.wikipedia;
-	    var input = select(null);
-	    var localizedInputs = select(null);
-	    var _countryCode;
-	    var _tags;
+	  return utilRebind(radio, dispatch, 'on');
+	}
 
+	function uiFieldRestrictions(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var breathe = behaviorBreathe();
+	  corePreferences('turn-restriction-via-way', null); // remove old key
 
-	    // A concern here in switching to async data means that _languagesArray will not
-	    // be available the first time through, so things like the fetchers and
-	    // the language() function will not work immediately.
-	    _mainFileFetcher.get('languages')
-	        .then(loadLanguagesArray)
-	        .catch(function() { /* ignore */ });
+	  var storedViaWay = corePreferences('turn-restriction-via-way0'); // use new key #6922
 
-	    var _territoryLanguages = {};
-	    _mainFileFetcher.get('territory_languages')
-	        .then(function(d) { _territoryLanguages = d; })
-	        .catch(function() { /* ignore */ });
+	  var storedDistance = corePreferences('turn-restriction-distance');
 
+	  var _maxViaWay = storedViaWay !== null ? +storedViaWay : 0;
 
-	    var allSuggestions = _mainPresetIndex.collection.filter(function(p) {
-	        return p.suggestion === true;
-	    });
+	  var _maxDistance = storedDistance ? +storedDistance : 30;
 
-	    // reuse these combos
-	    var langCombo = uiCombobox(context, 'localized-lang')
-	        .fetcher(fetchLanguages)
-	        .minItems(0);
+	  var _initialized = false;
 
-	    var brandCombo = uiCombobox(context, 'localized-brand')
-	        .canAutocomplete(false)
-	        .minItems(1);
+	  var _parent = select(null); // the entire field
 
-	    var _selection = select(null);
-	    var _multilingual = [];
-	    var _buttonTip = uiTooltip()
-	        .title(_t('translate.translate'))
-	        .placement('left');
-	    var _wikiTitles;
-	    var _entityIDs = [];
 
+	  var _container = select(null); // just the map
 
-	    function loadLanguagesArray(dataLanguages) {
-	        if (_languagesArray.length !== 0) { return; }
 
-	        // some conversion is needed to ensure correct OSM tags are used
-	        var replacements = {
-	            sr: 'sr-Cyrl',      // in OSM, `sr` implies Cyrillic
-	            'sr-Cyrl': false    // `sr-Cyrl` isn't used in OSM
-	        };
+	  var _oldTurns;
 
-	        for (var code in dataLanguages) {
-	            if (replacements[code] === false) { continue; }
-	            var metaCode = code;
-	            if (replacements[code]) { metaCode = replacements[code]; }
+	  var _graph;
 
-	            _languagesArray.push({
-	                localName: _mainLocalizer.languageName(metaCode, { localOnly: true }),
-	                nativeName: dataLanguages[metaCode].nativeName,
-	                code: code,
-	                label: _mainLocalizer.languageName(metaCode)
-	            });
-	        }
-	    }
+	  var _vertexID;
 
+	  var _intersection;
 
-	    function calcLocked() {
+	  var _fromWayID;
 
-	        // only lock the Name field
-	        var isLocked = field.id === 'name' &&
-	            _entityIDs.length &&
-	            // lock the field if any feature needs it
-	            _entityIDs.some(function(entityID) {
+	  var _lastXPos;
 
-	                var entity = context.graph().hasEntity(entityID);
-	                if (!entity) { return false; }
+	  function restrictions(selection) {
+	    _parent = selection; // try to reuse the intersection, but always rebuild it if the graph has changed
 
-	                var original = context.graph().base().entities[_entityIDs[0]];
-	                var hasOriginalName = original && entity.tags.name && entity.tags.name === original.tags.name;
-	                // if the name was already edited manually then allow further editing
-	                if (!hasOriginalName) { return false; }
+	    if (_vertexID && (context.graph() !== _graph || !_intersection)) {
+	      _graph = context.graph();
+	      _intersection = osmIntersection(_graph, _vertexID, _maxDistance);
+	    } // It's possible for there to be no actual intersection here.
+	    // for example, a vertex of two `highway=path`
+	    // In this case, hide the field.
 
-	                // features linked to Wikidata are likely important and should be protected
-	                if (entity.tags.wikidata) { return true; }
 
-	                // assume the name has already been confirmed if its source has been researched
-	                if (entity.tags['name:etymology:wikidata']) { return true; }
+	    var isOK = _intersection && _intersection.vertices.length && // has vertices
+	    _intersection.vertices // has the vertex that the user selected
+	    .filter(function (vertex) {
+	      return vertex.id === _vertexID;
+	    }).length && _intersection.ways.length > 2 && // has more than 2 ways
+	    _intersection.ways // has more than 1 TO way
+	    .filter(function (way) {
+	      return way.__to;
+	    }).length > 1; // Also hide in the case where
 
-	                var preset = _mainPresetIndex.match(entity, context.graph());
-	                var isSuggestion = preset && preset.suggestion;
-	                var showsBrand = preset && preset.originalFields.filter(function(d) {
-	                    return d.id === 'brand';
-	                }).length;
-	                // protect standardized brand names
-	                return isSuggestion && !showsBrand;
-	            });
+	    select(selection.node().parentNode).classed('hide', !isOK); // if form field is hidden or has detached from dom, clean up.
 
-	        field.locked(isLocked);
+	    if (!isOK || !context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode || !selection.node().parentNode.parentNode) {
+	      selection.call(restrictions.off);
+	      return;
 	    }
 
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    var container = wrap.selectAll('.restriction-container').data([0]); // enter
 
-	    // update _multilingual, maintaining the existing order
-	    function calcMultilingual(tags) {
-	        var existingLangsOrdered = _multilingual.map(function(item) {
-	            return item.lang;
-	        });
-	        var existingLangs = new Set(existingLangsOrdered.filter(Boolean));
+	    var containerEnter = container.enter().append('div').attr('class', 'restriction-container');
+	    containerEnter.append('div').attr('class', 'restriction-help'); // update
 
-	        for (var k in tags) {
-	            var m = k.match(/^(.*):([a-zA-Z_-]+)$/);
-	            if (m && m[1] === field.key && m[2]) {
-	                var item = { lang: m[2], value: tags[k] };
-	                if (existingLangs.has(item.lang)) {
-	                    // update the value
-	                    _multilingual[existingLangsOrdered.indexOf(item.lang)].value = item.value;
-	                    existingLangs.delete(item.lang);
-	                } else {
-	                    _multilingual.push(item);
-	                }
-	            }
-	        }
+	    _container = containerEnter.merge(container).call(renderViewer);
+	    var controls = wrap.selectAll('.restriction-controls').data([0]); // enter/update
 
-	        _multilingual = _multilingual.filter(function(item) {
-	            return !item.lang || !existingLangs.has(item.lang);
-	        });
-	    }
+	    controls.enter().append('div').attr('class', 'restriction-controls-container').append('div').attr('class', 'restriction-controls').merge(controls).call(renderControls);
+	  }
 
+	  function renderControls(selection) {
+	    var distControl = selection.selectAll('.restriction-distance').data([0]);
+	    distControl.exit().remove();
+	    var distControlEnter = distControl.enter().append('div').attr('class', 'restriction-control restriction-distance');
+	    distControlEnter.append('span').attr('class', 'restriction-control-label restriction-distance-label').html(_t.html('restriction.controls.distance') + ':');
+	    distControlEnter.append('input').attr('class', 'restriction-distance-input').attr('type', 'range').attr('min', '20').attr('max', '50').attr('step', '5');
+	    distControlEnter.append('span').attr('class', 'restriction-distance-text'); // update
 
-	    function localized(selection) {
-	        _selection = selection;
-	        calcLocked();
-	        var isLocked = field.locked();
-	        var singularEntity = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
-	        var preset = singularEntity && _mainPresetIndex.match(singularEntity, context.graph());
+	    selection.selectAll('.restriction-distance-input').property('value', _maxDistance).on('input', function () {
+	      var val = select(this).property('value');
+	      _maxDistance = +val;
+	      _intersection = null;
 
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	      _container.selectAll('.layer-osm .layer-turns *').remove();
 
-	        // enter/update
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
-
-	        input = wrap.selectAll('.localized-main')
-	            .data([0]);
-
-	        // enter/update
-	        input = input.enter()
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('id', field.domId)
-	            .attr('class', 'localized-main')
-	            .call(utilNoAuto)
-	            .merge(input);
-
-	        if (preset && field.id === 'name') {
-	            var pTag = preset.id.split('/', 2);
-	            var pKey = pTag[0];
-	            var pValue = pTag[1];
-
-	            if (!preset.suggestion) {
-	                // Not a suggestion preset - Add a suggestions dropdown if it makes sense to.
-	                // This code attempts to determine if the matched preset is the
-	                // kind of preset that even can benefit from name suggestions..
-	                // - true = shops, cafes, hotels, etc. (also generic and fallback presets)
-	                // - false = churches, parks, hospitals, etc. (things not in the index)
-	                var isFallback = preset.isFallback();
-	                var goodSuggestions = allSuggestions.filter(function(s) {
-	                    if (isFallback) { return true; }
-	                    var sTag = s.id.split('/', 2);
-	                    var sKey = sTag[0];
-	                    var sValue = sTag[1];
-	                    return pKey === sKey && (!pValue || pValue === sValue);
-	                });
+	      corePreferences('turn-restriction-distance', _maxDistance);
 
-	                // Show the suggestions.. If the user picks one, change the tags..
-	                if (allSuggestions.length && goodSuggestions.length) {
-	                    input
-	                        .on('blur.localized', checkBrandOnBlur)
-	                        .call(brandCombo
-	                            .fetcher(fetchBrandNames(preset, allSuggestions))
-	                            .on('accept', acceptBrand)
-	                            .on('cancel', cancelBrand)
-	                        );
-	                }
-	            }
-	        }
+	      _parent.call(restrictions);
+	    });
+	    selection.selectAll('.restriction-distance-text').html(displayMaxDistance(_maxDistance));
+	    var viaControl = selection.selectAll('.restriction-via-way').data([0]);
+	    viaControl.exit().remove();
+	    var viaControlEnter = viaControl.enter().append('div').attr('class', 'restriction-control restriction-via-way');
+	    viaControlEnter.append('span').attr('class', 'restriction-control-label restriction-via-way-label').html(_t.html('restriction.controls.via') + ':');
+	    viaControlEnter.append('input').attr('class', 'restriction-via-way-input').attr('type', 'range').attr('min', '0').attr('max', '2').attr('step', '1');
+	    viaControlEnter.append('span').attr('class', 'restriction-via-way-text'); // update
 
-	        input
-	            .classed('disabled', !!isLocked)
-	            .attr('readonly', isLocked || null)
-	            .on('input', change(true))
-	            .on('blur', change())
-	            .on('change', change());
+	    selection.selectAll('.restriction-via-way-input').property('value', _maxViaWay).on('input', function () {
+	      var val = select(this).property('value');
+	      _maxViaWay = +val;
 
+	      _container.selectAll('.layer-osm .layer-turns *').remove();
 
-	        var translateButton = wrap.selectAll('.localized-add')
-	            .data([0]);
+	      corePreferences('turn-restriction-via-way0', _maxViaWay);
 
-	        translateButton = translateButton.enter()
-	            .append('button')
-	            .attr('class', 'localized-add form-field-button')
-	            .attr('tabindex', -1)
-	            .call(svgIcon('#iD-icon-plus'))
-	            .merge(translateButton);
+	      _parent.call(restrictions);
+	    });
+	    selection.selectAll('.restriction-via-way-text').html(displayMaxVia(_maxViaWay));
+	  }
+
+	  function renderViewer(selection) {
+	    if (!_intersection) return;
+	    var vgraph = _intersection.graph;
+	    var filter = utilFunctor(true);
+	    var projection = geoRawMercator(); // Reflow warning: `utilGetDimensions` calls `getBoundingClientRect`
+	    // Instead of asking the restriction-container for its dimensions,
+	    //  we can ask the .sidebar, which can have its dimensions cached.
+	    // width: calc as sidebar - padding
+	    // height: hardcoded (from `80_app.css`)
+	    // var d = utilGetDimensions(selection);
+
+	    var sdims = utilGetDimensions(context.container().select('.sidebar'));
+	    var d = [sdims[0] - 50, 370];
+	    var c = geoVecScale(d, 0.5);
+	    var z = 22;
+	    projection.scale(geoZoomToScale(z)); // Calculate extent of all key vertices
 
-	        translateButton
-	            .classed('disabled', !!isLocked)
-	            .call(isLocked ? _buttonTip.destroy : _buttonTip)
-	            .on('click', addNew);
+	    var extent = geoExtent();
 
+	    for (var i = 0; i < _intersection.vertices.length; i++) {
+	      extent._extend(_intersection.vertices[i].extent());
+	    } // If this is a large intersection, adjust zoom to fit extent
 
-	        if (_tags && !_multilingual.length) {
-	            calcMultilingual(_tags);
-	        }
 
-	        localizedInputs = selection.selectAll('.localized-multilingual')
-	            .data([0]);
+	    if (_intersection.vertices.length > 1) {
+	      var padding = 180; // in z22 pixels
 
-	        localizedInputs = localizedInputs.enter()
-	            .append('div')
-	            .attr('class', 'localized-multilingual')
-	            .merge(localizedInputs);
+	      var tl = projection([extent[0][0], extent[1][1]]);
+	      var br = projection([extent[1][0], extent[0][1]]);
+	      var hFactor = (br[0] - tl[0]) / (d[0] - padding);
+	      var vFactor = (br[1] - tl[1]) / (d[1] - padding);
+	      var hZoomDiff = Math.log(Math.abs(hFactor)) / Math.LN2;
+	      var vZoomDiff = Math.log(Math.abs(vFactor)) / Math.LN2;
+	      z = z - Math.max(hZoomDiff, vZoomDiff);
+	      projection.scale(geoZoomToScale(z));
+	    }
 
-	        localizedInputs
-	            .call(renderMultilingual);
+	    var padTop = 35; // reserve top space for hint text
 
-	        localizedInputs.selectAll('button, input')
-	            .classed('disabled', !!isLocked)
-	            .attr('readonly', isLocked || null);
+	    var extentCenter = projection(extent.center());
+	    extentCenter[1] = extentCenter[1] - padTop;
+	    projection.translate(geoVecSubtract(c, extentCenter)).clipExtent([[0, 0], d]);
+	    var drawLayers = svgLayers(projection, context).only(['osm', 'touch']).dimensions(d);
+	    var drawVertices = svgVertices(projection, context);
+	    var drawLines = svgLines(projection, context);
+	    var drawTurns = svgTurns(projection, context);
+	    var firstTime = selection.selectAll('.surface').empty();
+	    selection.call(drawLayers);
+	    var surface = selection.selectAll('.surface').classed('tr', true);
 
+	    if (firstTime) {
+	      _initialized = true;
+	      surface.call(breathe);
+	    } // This can happen if we've lowered the detail while a FROM way
+	    // is selected, and that way is no longer part of the intersection.
 
 
-	        // We are not guaranteed to get an `accept` or `cancel` when blurring the field.
-	        // (This can happen if the user actives the combo, arrows down, and then clicks off to blur)
-	        // So compare the current field value against the suggestions one last time.
-	        function checkBrandOnBlur() {
-	            var latest = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
-	            if (!latest) { return; }   // deleting the entity blurred the field?
+	    if (_fromWayID && !vgraph.hasEntity(_fromWayID)) {
+	      _fromWayID = null;
+	      _oldTurns = null;
+	    }
 
-	            var preset = _mainPresetIndex.match(latest, context.graph());
-	            if (preset && preset.suggestion) { return; }   // already accepted
+	    surface.call(utilSetDimensions, d).call(drawVertices, vgraph, _intersection.vertices, filter, extent, z).call(drawLines, vgraph, _intersection.ways, filter).call(drawTurns, vgraph, _intersection.turns(_fromWayID, _maxViaWay));
+	    surface.on('click.restrictions', click).on('mouseover.restrictions', mouseover);
+	    surface.selectAll('.selected').classed('selected', false);
+	    surface.selectAll('.related').classed('related', false);
+	    var way;
 
-	            // note: here we are testing against "decorated" names, i.e. 'Starbucks – Cafe'
-	            var name = utilGetSetValue(input).trim();
-	            var matched = allSuggestions.filter(function(s) { return name === s.name(); });
+	    if (_fromWayID) {
+	      way = vgraph.entity(_fromWayID);
+	      surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
+	    }
 
-	            if (matched.length === 1) {
-	                acceptBrand({ suggestion: matched[0] });
-	            } else {
-	                cancelBrand();
-	            }
-	        }
+	    document.addEventListener('resizeWindow', function () {
+	      utilSetDimensions(_container, null);
+	      redraw(1);
+	    }, false);
+	    updateHints(null);
 
+	    function click(d3_event) {
+	      surface.call(breathe.off).call(breathe);
+	      var datum = d3_event.target.__data__;
+	      var entity = datum && datum.properties && datum.properties.entity;
 
-	        function acceptBrand(d) {
+	      if (entity) {
+	        datum = entity;
+	      }
 
-	            var entity = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
+	      if (datum instanceof osmWay && (datum.__from || datum.__via)) {
+	        _fromWayID = datum.id;
+	        _oldTurns = null;
+	        redraw();
+	      } else if (datum instanceof osmTurn) {
+	        var actions, extraActions, turns, i;
+	        var restrictionType = osmInferRestriction(vgraph, datum, projection);
 
-	            if (!d || !entity) {
-	                cancelBrand();
-	                return;
-	            }
+	        if (datum.restrictionID && !datum.direct) {
+	          return;
+	        } else if (datum.restrictionID && !datum.only) {
+	          // NO -> ONLY
+	          var seen = {};
+	          var datumOnly = JSON.parse(JSON.stringify(datum)); // deep clone the datum
 
-	            var tags = entity.tags;
-	            var geometry = entity.geometry(context.graph());
-	            var removed = preset.unsetTags(tags, geometry);
-	            for (var k in tags) {
-	                tags[k] = removed[k];  // set removed tags to `undefined`
-	            }
-	            tags = d.suggestion.setTags(tags, geometry);
-	            utilGetSetValue(input, tags.name);
-	            dispatch$1.call('change', this, tags);
-	        }
+	          datumOnly.only = true; // but change this property
 
+	          restrictionType = restrictionType.replace(/^no/, 'only'); // Adding an ONLY restriction should destroy all other direct restrictions from the FROM towards the VIA.
+	          // We will remember them in _oldTurns, and restore them if the user clicks again.
 
-	        // user hit escape, clean whatever preset name appears after the last ' – '
-	        function cancelBrand() {
-	            var name = utilGetSetValue(input);
-	            var clean = cleanName(name);
-	            if (clean !== name) {
-	                utilGetSetValue(input, clean);
-	                dispatch$1.call('change', this, { name: clean });
-	            }
-	        }
+	          turns = _intersection.turns(_fromWayID, 2);
+	          extraActions = [];
+	          _oldTurns = [];
 
-	        // Remove whatever is after the last ' – '
-	        // NOTE: split/join on en-dash, not a hyphen (to avoid conflict with fr - nl names in Brussels etc)
-	        function cleanName(name) {
-	            var parts = name.split(' – ');
-	            if (parts.length > 1) {
-	                parts.pop();
-	                name = parts.join(' – ');
-	            }
-	            return name;
-	        }
-
-
-	        function fetchBrandNames(preset, suggestions) {
-	            var pTag = preset.id.split('/', 2);
-	            var pKey = pTag[0];
-	            var pValue = pTag[1];
-
-	            return function(value, callback) {
-	                var results = [];
-	                if (value && value.length > 2) {
-	                    for (var i = 0; i < suggestions.length; i++) {
-	                        var s = suggestions[i];
-
-	                        // don't suggest brands from incompatible countries
-	                        if (_countryCode && s.countryCodes &&
-	                            s.countryCodes.indexOf(_countryCode) === -1) { continue; }
-
-	                        var sTag = s.id.split('/', 2);
-	                        var sKey = sTag[0];
-	                        var sValue = sTag[1];
-	                        var name = s.name();
-	                        var dist = utilEditDistance(value, name.substring(0, value.length));
-	                        var matchesPreset = (pKey === sKey && (!pValue || pValue === sValue));
-
-	                        if (dist < 1 || (matchesPreset && dist < 3)) {
-	                            var obj = {
-	                                title: name,
-	                                value: name,
-	                                suggestion: s,
-	                                dist: dist + (matchesPreset ? 0 : 1)  // penalize if not matched preset
-	                            };
-	                            results.push(obj);
-	                        }
-	                    }
-	                    results.sort(function(a, b) { return a.dist - b.dist; });
-	                }
-	                results = results.slice(0, 10);
-	                callback(results);
-	            };
-	        }
+	          for (i = 0; i < turns.length; i++) {
+	            var turn = turns[i];
+	            if (seen[turn.restrictionID]) continue; // avoid deleting the turn twice (#4968, #4928)
 
+	            if (turn.direct && turn.path[1] === datum.path[1]) {
+	              seen[turns[i].restrictionID] = true;
+	              turn.restrictionType = osmInferRestriction(vgraph, turn, projection);
 
-	        function addNew() {
-	            event.preventDefault();
-	            if (field.locked()) { return; }
+	              _oldTurns.push(turn);
 
-	            var defaultLang = _mainLocalizer.languageCode().toLowerCase();
-	            var langExists = _multilingual.find(function(datum) { return datum.lang === defaultLang; });
-	            var isLangEn = defaultLang.indexOf('en') > -1;
-	            if (isLangEn || langExists) {
-	                defaultLang = '';
-	                langExists = _multilingual.find(function(datum) { return datum.lang === defaultLang; });
+	              extraActions.push(actionUnrestrictTurn(turn));
 	            }
+	          }
 
-	            if (!langExists) {
-	                // prepend the value so it appears at the top
-	                _multilingual.unshift({ lang: defaultLang, value: '' });
+	          actions = _intersection.actions.concat(extraActions, [actionRestrictTurn(datumOnly, restrictionType), _t('operations.restriction.annotation.create')]);
+	        } else if (datum.restrictionID) {
+	          // ONLY -> Allowed
+	          // Restore whatever restrictions we might have destroyed by cycling thru the ONLY state.
+	          // This relies on the assumption that the intersection was already split up when we
+	          // performed the previous action (NO -> ONLY), so the IDs in _oldTurns shouldn't have changed.
+	          turns = _oldTurns || [];
+	          extraActions = [];
 
-	                localizedInputs
-	                    .call(renderMultilingual);
+	          for (i = 0; i < turns.length; i++) {
+	            if (turns[i].key !== datum.key) {
+	              extraActions.push(actionRestrictTurn(turns[i], turns[i].restrictionType));
 	            }
-	        }
-
-
-	        function change(onInput) {
-	            return function() {
-	                if (field.locked()) {
-	                    event.preventDefault();
-	                    return;
-	                }
-
-	                var val = utilGetSetValue(select(this));
-	                if (!onInput) { val = context.cleanTagValue(val); }
-
-	                // don't override multiple values with blank string
-	                if (!val && Array.isArray(_tags[field.key])) { return; }
-
-	                var t = {};
+	          }
 
-	                t[field.key] = val || undefined;
-	                dispatch$1.call('change', this, t, onInput);
-	            };
+	          _oldTurns = null;
+	          actions = _intersection.actions.concat(extraActions, [actionUnrestrictTurn(datum), _t('operations.restriction.annotation.delete')]);
+	        } else {
+	          // Allowed -> NO
+	          actions = _intersection.actions.concat([actionRestrictTurn(datum, restrictionType), _t('operations.restriction.annotation.create')]);
 	        }
-	    }
 
+	        context.perform.apply(context, actions); // At this point the datum will be changed, but will have same key..
+	        // Refresh it and update the help..
 
-	    function key(lang) {
-	        return field.key + ':' + lang;
+	        var s = surface.selectAll('.' + datum.key);
+	        datum = s.empty() ? null : s.datum();
+	        updateHints(datum);
+	      } else {
+	        _fromWayID = null;
+	        _oldTurns = null;
+	        redraw();
+	      }
 	    }
 
+	    function mouseover(d3_event) {
+	      var datum = d3_event.target.__data__;
+	      updateHints(datum);
+	    }
 
-	    function changeLang(d) {
-	        var tags = {};
-
-	        // make sure unrecognized suffixes are lowercase - #7156
-	        var lang = utilGetSetValue(select(this)).toLowerCase();
-
-	        var language = _languagesArray.find(function(d) {
-	            return d.label.toLowerCase() === lang ||
-	                (d.localName && d.localName.toLowerCase() === lang) ||
-	                (d.nativeName && d.nativeName.toLowerCase() === lang);
-	        });
-	        if (language) { lang = language.code; }
+	    _lastXPos = _lastXPos || sdims[0];
 
-	        if (d.lang && d.lang !== lang) {
-	            tags[key(d.lang)] = undefined;
-	        }
+	    function redraw(minChange) {
+	      var xPos = -1;
 
-	        var newKey = lang && context.cleanTagKey(key(lang));
+	      if (minChange) {
+	        xPos = utilGetDimensions(context.container().select('.sidebar'))[0];
+	      }
 
-	        var value = utilGetSetValue(select(this.parentNode).selectAll('.localized-value'));
+	      if (!minChange || minChange && Math.abs(xPos - _lastXPos) >= minChange) {
+	        if (context.hasEntity(_vertexID)) {
+	          _lastXPos = xPos;
 
-	        if (newKey && value) {
-	            tags[newKey] = value;
-	        } else if (newKey && _wikiTitles && _wikiTitles[d.lang]) {
-	            tags[newKey] = _wikiTitles[d.lang];
+	          _container.call(renderViewer);
 	        }
-
-	        d.lang = lang;
-	        dispatch$1.call('change', this, tags);
+	      }
 	    }
 
+	    function highlightPathsFrom(wayID) {
+	      surface.selectAll('.related').classed('related', false).classed('allow', false).classed('restrict', false).classed('only', false);
+	      surface.selectAll('.' + wayID).classed('related', true);
 
-	    function changeValue(d) {
-	        if (!d.lang) { return; }
-	        var value = context.cleanTagValue(utilGetSetValue(select(this))) || undefined;
+	      if (wayID) {
+	        var turns = _intersection.turns(wayID, _maxViaWay);
 
-	        // don't override multiple values with blank string
-	        if (!value && Array.isArray(d.value)) { return; }
+	        for (var i = 0; i < turns.length; i++) {
+	          var turn = turns[i];
+	          var ids = [turn.to.way];
+	          var klass = turn.no ? 'restrict' : turn.only ? 'only' : 'allow';
 
-	        var t = {};
-	        t[key(d.lang)] = value;
-	        d.value = value;
-	        dispatch$1.call('change', this, t);
+	          if (turn.only || turns.length === 1) {
+	            if (turn.via.ways) {
+	              ids = ids.concat(turn.via.ways);
+	            }
+	          } else if (turn.to.way === wayID) {
+	            continue;
+	          }
+
+	          surface.selectAll(utilEntitySelector(ids)).classed('related', true).classed('allow', klass === 'allow').classed('restrict', klass === 'restrict').classed('only', klass === 'only');
+	        }
+	      }
 	    }
 
+	    function updateHints(datum) {
+	      var help = _container.selectAll('.restriction-help').html('');
 
-	    function fetchLanguages(value, cb) {
-	        var v = value.toLowerCase();
+	      var placeholders = {};
+	      ['from', 'via', 'to'].forEach(function (k) {
+	        placeholders[k] = '<span class="qualifier">' + _t('restriction.help.' + k) + '</span>';
+	      });
+	      var entity = datum && datum.properties && datum.properties.entity;
 
-	        // show the user's language first
-	        var langCodes = [_mainLocalizer.localeCode(), _mainLocalizer.languageCode()];
+	      if (entity) {
+	        datum = entity;
+	      }
 
-	        if (_countryCode && _territoryLanguages[_countryCode]) {
-	            langCodes = langCodes.concat(_territoryLanguages[_countryCode]);
+	      if (_fromWayID) {
+	        way = vgraph.entity(_fromWayID);
+	        surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
+	      } // Hovering a way
+
+
+	      if (datum instanceof osmWay && datum.__from) {
+	        way = datum;
+	        highlightPathsFrom(_fromWayID ? null : way.id);
+	        surface.selectAll('.' + way.id).classed('related', true);
+	        var clickSelect = !_fromWayID || _fromWayID !== way.id;
+	        help.append('div') // "Click to select FROM {fromName}." / "FROM {fromName}"
+	        .html(_t.html('restriction.help.' + (clickSelect ? 'select_from_name' : 'from_name'), {
+	          from: placeholders.from,
+	          fromName: displayName(way.id, vgraph)
+	        })); // Hovering a turn arrow
+	      } else if (datum instanceof osmTurn) {
+	        var restrictionType = osmInferRestriction(vgraph, datum, projection);
+	        var turnType = restrictionType.replace(/^(only|no)\_/, '');
+	        var indirect = datum.direct === false ? _t.html('restriction.help.indirect') : '';
+	        var klass, turnText, nextText;
+
+	        if (datum.no) {
+	          klass = 'restrict';
+	          turnText = _t.html('restriction.help.turn.no_' + turnType, {
+	            indirect: indirect
+	          });
+	          nextText = _t.html('restriction.help.turn.only_' + turnType, {
+	            indirect: ''
+	          });
+	        } else if (datum.only) {
+	          klass = 'only';
+	          turnText = _t.html('restriction.help.turn.only_' + turnType, {
+	            indirect: indirect
+	          });
+	          nextText = _t.html('restriction.help.turn.allowed_' + turnType, {
+	            indirect: ''
+	          });
+	        } else {
+	          klass = 'allow';
+	          turnText = _t.html('restriction.help.turn.allowed_' + turnType, {
+	            indirect: indirect
+	          });
+	          nextText = _t.html('restriction.help.turn.no_' + turnType, {
+	            indirect: ''
+	          });
 	        }
 
-	        var langItems = [];
-	        langCodes.forEach(function(code) {
-	            var langItem = _languagesArray.find(function(item) {
-	                return item.code === code;
-	            });
-	            if (langItem) { langItems.push(langItem); }
-	        });
-	        langItems = utilArrayUniq(langItems.concat(_languagesArray));
-
-	        cb(langItems.filter(function(d) {
-	            return d.label.toLowerCase().indexOf(v) >= 0 ||
-	                (d.localName && d.localName.toLowerCase().indexOf(v) >= 0) ||
-	                (d.nativeName && d.nativeName.toLowerCase().indexOf(v) >= 0) ||
-	                d.code.toLowerCase().indexOf(v) >= 0;
-	        }).map(function(d) {
-	            return { value: d.label };
+	        help.append('div') // "NO Right Turn (indirect)"
+	        .attr('class', 'qualifier ' + klass).html(turnText);
+	        help.append('div') // "FROM {fromName} TO {toName}"
+	        .html(_t.html('restriction.help.from_name_to_name', {
+	          from: placeholders.from,
+	          fromName: displayName(datum.from.way, vgraph),
+	          to: placeholders.to,
+	          toName: displayName(datum.to.way, vgraph)
 	        }));
-	    }
-
-
-	    function renderMultilingual(selection) {
-	        var entries = selection.selectAll('div.entry')
-	            .data(_multilingual, function(d) { return d.lang; });
 
-	        entries.exit()
-	            .style('top', '0')
-	            .style('max-height', '240px')
-	            .transition()
-	            .duration(200)
-	            .style('opacity', '0')
-	            .style('max-height', '0px')
-	            .remove();
+	        if (datum.via.ways && datum.via.ways.length) {
+	          var names = [];
 
-	        var entriesEnter = entries.enter()
-	            .append('div')
-	            .attr('class', 'entry')
-	            .each(function(_, index) {
-	                var wrap = select(this);
-
-	                var domId = utilUniqueDomId(index);
-
-	                var label = wrap
-	                    .append('label')
-	                    .attr('class', 'field-label')
-	                    .attr('for', domId);
-
-	                var text = label
-	                    .append('span')
-	                    .attr('class', 'label-text');
-
-	                text
-	                    .append('span')
-	                    .attr('class', 'label-textvalue')
-	                    .text(_t('translate.localized_translation_label'));
-
-	                text
-	                    .append('span')
-	                    .attr('class', 'label-textannotation');
-
-	                label
-	                    .append('button')
-	                    .attr('class', 'remove-icon-multilingual')
-	                    .on('click', function(d, index) {
-	                        if (field.locked()) { return; }
-	                        event.preventDefault();
-
-	                        if (!d.lang || !d.value) {
-	                            _multilingual.splice(index, 1);
-	                            renderMultilingual(selection);
-	                        } else {
-	                            // remove from entity tags
-	                            var t = {};
-	                            t[key(d.lang)] = undefined;
-	                            dispatch$1.call('change', this, t);
-	                        }
-
-	                    })
-	                    .call(svgIcon('#iD-operation-delete'));
-
-	                wrap
-	                    .append('input')
-	                    .attr('class', 'localized-lang')
-	                    .attr('id', domId)
-	                    .attr('type', 'text')
-	                    .attr('placeholder', _t('translate.localized_translation_language'))
-	                    .on('blur', changeLang)
-	                    .on('change', changeLang)
-	                    .call(langCombo);
-
-	                wrap
-	                    .append('input')
-	                    .attr('type', 'text')
-	                    .attr('class', 'localized-value')
-	                    .on('blur', changeValue)
-	                    .on('change', changeValue);
-	            });
-
-	        entriesEnter
-	            .style('margin-top', '0px')
-	            .style('max-height', '0px')
-	            .style('opacity', '0')
-	            .transition()
-	            .duration(200)
-	            .style('margin-top', '10px')
-	            .style('max-height', '240px')
-	            .style('opacity', '1')
-	            .on('end', function() {
-	                select(this)
-	                    .style('max-height', '')
-	                    .style('overflow', 'visible');
-	            });
+	          for (var i = 0; i < datum.via.ways.length; i++) {
+	            var prev = names[names.length - 1];
+	            var curr = displayName(datum.via.ways[i], vgraph);
 
-	        entries = entries.merge(entriesEnter);
+	            if (!prev || curr !== prev) {
+	              // collapse identical names
+	              names.push(curr);
+	            }
+	          }
 
-	        entries.order();
+	          help.append('div') // "VIA {viaNames}"
+	          .html(_t.html('restriction.help.via_names', {
+	            via: placeholders.via,
+	            viaNames: names.join(', ')
+	          }));
+	        }
 
-	        entries.classed('present', function(d) {
-	            return d.lang && d.value;
-	        });
+	        if (!indirect) {
+	          help.append('div') // Click for "No Right Turn"
+	          .html(_t.html('restriction.help.toggle', {
+	            turn: nextText.trim()
+	          }));
+	        }
 
-	        utilGetSetValue(entries.select('.localized-lang'), function(d) {
-	            return _mainLocalizer.languageName(d.lang);
-	        });
+	        highlightPathsFrom(null);
+	        var alongIDs = datum.path.slice();
+	        surface.selectAll(utilEntitySelector(alongIDs)).classed('related', true).classed('allow', klass === 'allow').classed('restrict', klass === 'restrict').classed('only', klass === 'only'); // Hovering empty surface
+	      } else {
+	        highlightPathsFrom(null);
 
-	        utilGetSetValue(entries.select('.localized-value'), function(d) {
-	                return typeof d.value === 'string' ? d.value : '';
-	            })
-	            .attr('title', function(d) {
-	                return Array.isArray(d.value) ? d.value.filter(Boolean).join('\n') : null;
-	            })
-	            .attr('placeholder', function(d) {
-	                return Array.isArray(d.value) ? _t('inspector.multiple_values') : _t('translate.localized_translation_name');
-	            })
-	            .classed('mixed', function(d) {
-	                return Array.isArray(d.value);
-	            });
+	        if (_fromWayID) {
+	          help.append('div') // "FROM {fromName}"
+	          .html(_t.html('restriction.help.from_name', {
+	            from: placeholders.from,
+	            fromName: displayName(_fromWayID, vgraph)
+	          }));
+	        } else {
+	          help.append('div') // "Click to select a FROM segment."
+	          .html(_t.html('restriction.help.select_from', {
+	            from: placeholders.from
+	          }));
+	        }
+	      }
 	    }
+	  }
 
+	  function displayMaxDistance(maxDist) {
+	    var isImperial = !_mainLocalizer.usesMetric();
+	    var opts;
 
-	    localized.tags = function(tags) {
-	        _tags = tags;
+	    if (isImperial) {
+	      var distToFeet = {
+	        // imprecise conversion for prettier display
+	        20: 70,
+	        25: 85,
+	        30: 100,
+	        35: 115,
+	        40: 130,
+	        45: 145,
+	        50: 160
+	      }[maxDist];
+	      opts = {
+	        distance: _t('units.feet', {
+	          quantity: distToFeet
+	        })
+	      };
+	    } else {
+	      opts = {
+	        distance: _t('units.meters', {
+	          quantity: maxDist
+	        })
+	      };
+	    }
 
-	        // Fetch translations from wikipedia
-	        if (typeof tags.wikipedia === 'string' && !_wikiTitles) {
-	            _wikiTitles = {};
-	            var wm = tags.wikipedia.match(/([^:]+):(.+)/);
-	            if (wm && wm[0] && wm[1]) {
-	                wikipedia.translations(wm[1], wm[2], function(err, d) {
-	                    if (err || !d) { return; }
-	                    _wikiTitles = d;
-	                });
-	            }
-	        }
+	    return _t.html('restriction.controls.distance_up_to', opts);
+	  }
 
-	        var isMixed = Array.isArray(tags[field.key]);
+	  function displayMaxVia(maxVia) {
+	    return maxVia === 0 ? _t.html('restriction.controls.via_node_only') : maxVia === 1 ? _t.html('restriction.controls.via_up_to_one') : _t.html('restriction.controls.via_up_to_two');
+	  }
 
-	        utilGetSetValue(input, typeof tags[field.key] === 'string' ? tags[field.key] : '')
-	            .attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined)
-	            .attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder())
-	            .classed('mixed', isMixed);
+	  function displayName(entityID, graph) {
+	    var entity = graph.entity(entityID);
+	    var name = utilDisplayName(entity) || '';
+	    var matched = _mainPresetIndex.match(entity, graph);
+	    var type = matched && matched.name() || utilDisplayType(entity.id);
+	    return name || type;
+	  }
 
-	        calcMultilingual(tags);
+	  restrictions.entityIDs = function (val) {
+	    _intersection = null;
+	    _fromWayID = null;
+	    _oldTurns = null;
+	    _vertexID = val[0];
+	  };
 
-	        _selection
-	            .call(localized);
-	    };
+	  restrictions.tags = function () {};
 
+	  restrictions.focus = function () {};
 
-	    localized.focus = function() {
-	        input.node().focus();
-	    };
+	  restrictions.off = function (selection) {
+	    if (!_initialized) return;
+	    selection.selectAll('.surface').call(breathe.off).on('click.restrictions', null).on('mouseover.restrictions', null);
+	    select(window).on('resize.restrictions', null);
+	  };
 
+	  return utilRebind(restrictions, dispatch, 'on');
+	}
+	uiFieldRestrictions.supportsMultiselection = false;
 
-	    localized.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        _multilingual = [];
-	        loadCountryCode();
-	        return localized;
-	    };
+	function uiFieldTextarea(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var input = select(null);
 
-	    function loadCountryCode() {
-	        var extent = combinedEntityExtent();
-	        var countryCode = extent && iso1A2Code(extent.center());
-	        _countryCode = countryCode && countryCode.toLowerCase();
-	    }
+	  var _tags;
 
-	    function combinedEntityExtent() {
-	        return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
-	    }
+	  function textarea(selection) {
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    input = wrap.selectAll('textarea').data([0]);
+	    input = input.enter().append('textarea').attr('id', field.domId).call(utilNoAuto).on('input', change(true)).on('blur', change()).on('change', change()).merge(input);
+	  }
 
-	    return utilRebind(localized, dispatch$1, 'on');
-	}
+	  function change(onInput) {
+	    return function () {
+	      var val = utilGetSetValue(input);
+	      if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string
 
-	function uiFieldMaxspeed(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var unitInput = select(null);
-	    var input = select(null);
-	    var _entityIDs = [];
-	    var _tags;
-	    var _isImperial;
+	      if (!val && Array.isArray(_tags[field.key])) return;
+	      var t = {};
+	      t[field.key] = val || undefined;
+	      dispatch.call('change', this, t, onInput);
+	    };
+	  }
 
-	    var speedCombo = uiCombobox(context, 'maxspeed');
-	    var unitCombo = uiCombobox(context, 'maxspeed-unit')
-	            .data(['km/h', 'mph'].map(comboValues));
+	  textarea.tags = function (tags) {
+	    _tags = tags;
+	    var isMixed = Array.isArray(tags[field.key]);
+	    utilGetSetValue(input, !isMixed && tags[field.key] ? tags[field.key] : '').attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder() || _t('inspector.unknown')).classed('mixed', isMixed);
+	  };
 
-	    var metricValues = [20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120];
-	    var imperialValues = [5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80];
+	  textarea.focus = function () {
+	    input.node().focus();
+	  };
 
+	  return utilRebind(textarea, dispatch, 'on');
+	}
 
-	    function maxspeed(selection) {
+	var $ = _export;
+	var getOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;
+	var toLength = toLength$q;
+	var notARegExp = notARegexp;
+	var requireObjectCoercible = requireObjectCoercible$e;
+	var correctIsRegExpLogic = correctIsRegexpLogic;
 
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	// eslint-disable-next-line es/no-string-prototype-endswith -- safe
+	var $endsWith = ''.endsWith;
+	var min = Math.min;
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
+	var CORRECT_IS_REGEXP_LOGIC = correctIsRegExpLogic('endsWith');
+	// https://github.com/zloirock/core-js/pull/702
+	var MDN_POLYFILL_BUG = !CORRECT_IS_REGEXP_LOGIC && !!function () {
+	  var descriptor = getOwnPropertyDescriptor(String.prototype, 'endsWith');
+	  return descriptor && !descriptor.writable;
+	}();
+
+	// `String.prototype.endsWith` method
+	// https://tc39.es/ecma262/#sec-string.prototype.endswith
+	$({ target: 'String', proto: true, forced: !MDN_POLYFILL_BUG && !CORRECT_IS_REGEXP_LOGIC }, {
+	  endsWith: function endsWith(searchString /* , endPosition = @length */) {
+	    var that = String(requireObjectCoercible(this));
+	    notARegExp(searchString);
+	    var endPosition = arguments.length > 1 ? arguments[1] : undefined;
+	    var len = toLength(that.length);
+	    var end = endPosition === undefined ? len : min(toLength(endPosition), len);
+	    var search = String(searchString);
+	    return $endsWith
+	      ? $endsWith.call(that, search, end)
+	      : that.slice(end - search.length, end) === search;
+	  }
+	});
 
+	function uiFieldWikidata(field, context) {
+	  var wikidata = services.wikidata;
+	  var dispatch = dispatch$8('change');
 
-	        input = wrap.selectAll('input.maxspeed-number')
-	            .data([0]);
+	  var _selection = select(null);
 
-	        input = input.enter()
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('class', 'maxspeed-number')
-	            .attr('id', field.domId)
-	            .call(utilNoAuto)
-	            .call(speedCombo)
-	            .merge(input);
+	  var _searchInput = select(null);
 
-	        input
-	            .on('change', change)
-	            .on('blur', change);
+	  var _qid = null;
+	  var _wikidataEntity = null;
+	  var _wikiURL = '';
+	  var _entityIDs = [];
 
-	        var loc = combinedEntityExtent().center();
-	        _isImperial = roadSpeedUnit(loc) === 'mph';
+	  var _wikipediaKey = field.keys && field.keys.find(function (key) {
+	    return key.includes('wikipedia');
+	  }),
+	      _hintKey = field.key === 'wikidata' ? 'name' : field.key.split(':')[0];
 
-	        unitInput = wrap.selectAll('input.maxspeed-unit')
-	            .data([0]);
+	  var combobox = uiCombobox(context, 'combo-' + field.safeid).caseSensitive(true).minItems(1);
 
-	        unitInput = unitInput.enter()
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('class', 'maxspeed-unit')
-	            .call(unitCombo)
-	            .merge(unitInput);
+	  function wiki(selection) {
+	    _selection = selection;
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    var list = wrap.selectAll('ul').data([0]);
+	    list = list.enter().append('ul').attr('class', 'rows').merge(list);
+	    var searchRow = list.selectAll('li.wikidata-search').data([0]);
+	    var searchRowEnter = searchRow.enter().append('li').attr('class', 'wikidata-search');
+	    searchRowEnter.append('input').attr('type', 'text').attr('id', field.domId).style('flex', '1').call(utilNoAuto).on('focus', function () {
+	      var node = select(this).node();
+	      node.setSelectionRange(0, node.value.length);
+	    }).on('blur', function () {
+	      setLabelForEntity();
+	    }).call(combobox.fetcher(fetchWikidataItems));
+	    combobox.on('accept', function (d) {
+	      if (d) {
+	        _qid = d.id;
+	        change();
+	      }
+	    }).on('cancel', function () {
+	      setLabelForEntity();
+	    });
+	    searchRowEnter.append('button').attr('class', 'form-field-button wiki-link').attr('title', _t('icons.view_on', {
+	      domain: 'wikidata.org'
+	    })).call(svgIcon('#iD-icon-out-link')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      if (_wikiURL) window.open(_wikiURL, '_blank');
+	    });
+	    searchRow = searchRow.merge(searchRowEnter);
+	    _searchInput = searchRow.select('input');
+	    var wikidataProperties = ['description', 'identifier'];
+	    var items = list.selectAll('li.labeled-input').data(wikidataProperties); // Enter
 
-	        unitInput
-	            .on('blur', changeUnits)
-	            .on('change', changeUnits);
+	    var enter = items.enter().append('li').attr('class', function (d) {
+	      return 'labeled-input preset-wikidata-' + d;
+	    });
+	    enter.append('span').attr('class', 'label').html(function (d) {
+	      return _t.html('wikidata.' + d);
+	    });
+	    enter.append('input').attr('type', 'text').call(utilNoAuto).classed('disabled', 'true').attr('readonly', 'true');
+	    enter.append('button').attr('class', 'form-field-button').attr('title', _t('icons.copy')).call(svgIcon('#iD-operation-copy')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      select(this.parentNode).select('input').node().select();
+	      document.execCommand('copy');
+	    });
+	  }
 
+	  function fetchWikidataItems(q, callback) {
+	    if (!q && _hintKey) {
+	      // other tags may be good search terms
+	      for (var i in _entityIDs) {
+	        var entity = context.hasEntity(_entityIDs[i]);
 
-	        function changeUnits() {
-	            _isImperial = utilGetSetValue(unitInput) === 'mph';
-	            utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
-	            setUnitSuggestions();
-	            change();
+	        if (entity.tags[_hintKey]) {
+	          q = entity.tags[_hintKey];
+	          break;
 	        }
+	      }
 	    }
 
+	    wikidata.itemsForSearchQuery(q, function (err, data) {
+	      if (err) return;
 
-	    function setUnitSuggestions() {
-	        speedCombo.data((_isImperial ? imperialValues : metricValues).map(comboValues));
-	        utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
-	    }
+	      for (var i in data) {
+	        data[i].value = data[i].label + ' (' + data[i].id + ')';
+	        data[i].title = data[i].description;
+	      }
 
+	      if (callback) callback(data);
+	    });
+	  }
 
-	    function comboValues(d) {
-	        return {
-	            value: d.toString(),
-	            title: d.toString()
-	        };
-	    }
+	  function change() {
+	    var syncTags = {};
+	    syncTags[field.key] = _qid;
+	    dispatch.call('change', this, syncTags); // attempt asynchronous update of wikidata tag..
 
+	    var initGraph = context.graph();
+	    var initEntityIDs = _entityIDs;
+	    wikidata.entityByQID(_qid, function (err, entity) {
+	      if (err) return; // If graph has changed, we can't apply this update.
 
-	    function change() {
-	        var tag = {};
-	        var value = utilGetSetValue(input).trim();
+	      if (context.graph() !== initGraph) return;
+	      if (!entity.sitelinks) return;
+	      var langs = wikidata.languagesToQuery(); // use the label and description languages as fallbacks
 
-	        // don't override multiple values with blank string
-	        if (!value && Array.isArray(_tags[field.key])) { return; }
+	      ['labels', 'descriptions'].forEach(function (key) {
+	        if (!entity[key]) return;
+	        var valueLangs = Object.keys(entity[key]);
+	        if (valueLangs.length === 0) return;
+	        var valueLang = valueLangs[0];
 
-	        if (!value) {
-	            tag[field.key] = undefined;
-	        } else if (isNaN(value) || !_isImperial) {
-	            tag[field.key] = context.cleanTagValue(value);
-	        } else {
-	            tag[field.key] = context.cleanTagValue(value + ' mph');
+	        if (langs.indexOf(valueLang) === -1) {
+	          langs.push(valueLang);
 	        }
+	      });
+	      var newWikipediaValue;
 
-	        dispatch$1.call('change', this, tag);
-	    }
-
+	      if (_wikipediaKey) {
+	        var foundPreferred;
 
-	    maxspeed.tags = function(tags) {
-	        _tags = tags;
+	        for (var i in langs) {
+	          var lang = langs[i];
+	          var siteID = lang.replace('-', '_') + 'wiki';
 
-	        var value = tags[field.key];
-	        var isMixed = Array.isArray(value);
+	          if (entity.sitelinks[siteID]) {
+	            foundPreferred = true;
+	            newWikipediaValue = lang + ':' + entity.sitelinks[siteID].title; // use the first match
 
-	        if (!isMixed) {
-	            if (value && value.indexOf('mph') >= 0) {
-	                value = parseInt(value, 10).toString();
-	                _isImperial = true;
-	            } else if (value) {
-	                _isImperial = false;
-	            }
+	            break;
+	          }
 	        }
 
-	        setUnitSuggestions();
-
-	        utilGetSetValue(input, typeof value === 'string' ? value : '')
-	            .attr('title', isMixed ? value.filter(Boolean).join('\n') : null)
-	            .attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder())
-	            .classed('mixed', isMixed);
-	    };
-
-
-	    maxspeed.focus = function() {
-	        input.node().focus();
-	    };
+	        if (!foundPreferred) {
+	          // No wikipedia sites available in the user's language or the fallback languages,
+	          // default to any wikipedia sitelink
+	          var wikiSiteKeys = Object.keys(entity.sitelinks).filter(function (site) {
+	            return site.endsWith('wiki');
+	          });
 
+	          if (wikiSiteKeys.length === 0) {
+	            // if no wikipedia pages are linked to this wikidata entity, delete that tag
+	            newWikipediaValue = null;
+	          } else {
+	            var wikiLang = wikiSiteKeys[0].slice(0, -4).replace('_', '-');
+	            var wikiTitle = entity.sitelinks[wikiSiteKeys[0]].title;
+	            newWikipediaValue = wikiLang + ':' + wikiTitle;
+	          }
+	        }
+	      }
 
-	    maxspeed.entityIDs = function(val) {
-	        _entityIDs = val;
-	    };
+	      if (newWikipediaValue) {
+	        newWikipediaValue = context.cleanTagValue(newWikipediaValue);
+	      }
 
+	      if (typeof newWikipediaValue === 'undefined') return;
+	      var actions = initEntityIDs.map(function (entityID) {
+	        var entity = context.hasEntity(entityID);
+	        if (!entity) return null;
+	        var currTags = Object.assign({}, entity.tags); // shallow copy
 
-	    function combinedEntityExtent() {
-	        return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
-	    }
+	        if (newWikipediaValue === null) {
+	          if (!currTags[_wikipediaKey]) return null;
+	          delete currTags[_wikipediaKey];
+	        } else {
+	          currTags[_wikipediaKey] = newWikipediaValue;
+	        }
 
+	        return actionChangeTags(entityID, currTags);
+	      }).filter(Boolean);
+	      if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change
 
-	    return utilRebind(maxspeed, dispatch$1, 'on');
-	}
+	      context.overwrite(function actionUpdateWikipediaTags(graph) {
+	        actions.forEach(function (action) {
+	          graph = action(graph);
+	        });
+	        return graph;
+	      }, context.history().undoAnnotation()); // do not dispatch.call('change') here, because entity_editor
+	      // changeTags() is not intended to be called asynchronously
+	    });
+	  }
 
-	function uiFieldRadio(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var placeholder = select(null);
-	    var wrap = select(null);
-	    var labels = select(null);
-	    var radios = select(null);
-	    var radioData = (field.options || (field.strings && field.strings.options && Object.keys(field.strings.options)) || field.keys).slice();  // shallow copy
-	    var typeField;
-	    var layerField;
-	    var _oldType = {};
-	    var _entityIDs = [];
+	  function setLabelForEntity() {
+	    var label = '';
 
+	    if (_wikidataEntity) {
+	      label = entityPropertyForDisplay(_wikidataEntity, 'labels');
 
-	    function selectedKey() {
-	        var node = wrap.selectAll('.form-field-input-radio label.active input');
-	        return !node.empty() && node.datum();
+	      if (label.length === 0) {
+	        label = _wikidataEntity.id.toString();
+	      }
 	    }
 
+	    utilGetSetValue(_searchInput, label);
+	  }
+
+	  wiki.tags = function (tags) {
+	    var isMixed = Array.isArray(tags[field.key]);
 
-	    function radio(selection) {
-	        selection.classed('preset-radio', true);
+	    _searchInput.attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : null).attr('placeholder', isMixed ? _t('inspector.multiple_values') : '').classed('mixed', isMixed);
 
-	        wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	    _qid = typeof tags[field.key] === 'string' && tags[field.key] || '';
 
-	        var enter = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-radio');
+	    if (!/^Q[0-9]*$/.test(_qid)) {
+	      // not a proper QID
+	      unrecognized();
+	      return;
+	    } // QID value in correct format
 
-	        enter
-	            .append('span')
-	            .attr('class', 'placeholder');
 
-	        wrap = wrap
-	            .merge(enter);
+	    _wikiURL = 'https://wikidata.org/wiki/' + _qid;
+	    wikidata.entityByQID(_qid, function (err, entity) {
+	      if (err) {
+	        unrecognized();
+	        return;
+	      }
 
+	      _wikidataEntity = entity;
+	      setLabelForEntity();
+	      var description = entityPropertyForDisplay(entity, 'descriptions');
 
-	        placeholder = wrap.selectAll('.placeholder');
+	      _selection.select('button.wiki-link').classed('disabled', false);
 
-	        labels = wrap.selectAll('label')
-	            .data(radioData);
+	      _selection.select('.preset-wikidata-description').style('display', function () {
+	        return description.length > 0 ? 'flex' : 'none';
+	      }).select('input').attr('value', description);
 
-	        enter = labels.enter()
-	            .append('label');
+	      _selection.select('.preset-wikidata-identifier').style('display', function () {
+	        return entity.id ? 'flex' : 'none';
+	      }).select('input').attr('value', entity.id);
+	    }); // not a proper QID
 
-	        enter
-	            .append('input')
-	            .attr('type', 'radio')
-	            .attr('name', field.id)
-	            .attr('value', function(d) { return field.t('options.' + d, { 'default': d }); })
-	            .attr('checked', false);
+	    function unrecognized() {
+	      _wikidataEntity = null;
+	      setLabelForEntity();
 
-	        enter
-	            .append('span')
-	            .text(function(d) { return field.t('options.' + d, { 'default': d }); });
+	      _selection.select('.preset-wikidata-description').style('display', 'none');
 
-	        labels = labels
-	            .merge(enter);
+	      _selection.select('.preset-wikidata-identifier').style('display', 'none');
 
-	        radios = labels.selectAll('input')
-	            .on('change', changeRadio);
+	      _selection.select('button.wiki-link').classed('disabled', true);
 
+	      if (_qid && _qid !== '') {
+	        _wikiURL = 'https://wikidata.org/wiki/Special:Search?search=' + _qid;
+	      } else {
+	        _wikiURL = '';
+	      }
 	    }
+	  };
 
+	  function entityPropertyForDisplay(wikidataEntity, propKey) {
+	    if (!wikidataEntity[propKey]) return '';
+	    var propObj = wikidataEntity[propKey];
+	    var langKeys = Object.keys(propObj);
+	    if (langKeys.length === 0) return ''; // sorted by priority, since we want to show the user's language first if possible
 
-	    function structureExtras(selection, tags) {
-	        var selected = selectedKey() || tags.layer !== undefined;
-	        var type = _mainPresetIndex.field(selected);
-	        var layer = _mainPresetIndex.field('layer');
-	        var showLayer = (selected === 'bridge' || selected === 'tunnel' || tags.layer !== undefined);
+	    var langs = wikidata.languagesToQuery();
 
+	    for (var i in langs) {
+	      var lang = langs[i];
+	      var valueObj = propObj[lang];
+	      if (valueObj && valueObj.value && valueObj.value.length > 0) return valueObj.value;
+	    } // default to any available value
 
-	        var extrasWrap = selection.selectAll('.structure-extras-wrap')
-	            .data(selected ? [0] : []);
 
-	        extrasWrap.exit()
-	            .remove();
+	    return propObj[langKeys[0]].value;
+	  }
 
-	        extrasWrap = extrasWrap.enter()
-	            .append('div')
-	            .attr('class', 'structure-extras-wrap')
-	            .merge(extrasWrap);
+	  wiki.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return wiki;
+	  };
 
-	        var list = extrasWrap.selectAll('ul')
-	            .data([0]);
+	  wiki.focus = function () {
+	    _searchInput.node().focus();
+	  };
 
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'rows')
-	            .merge(list);
+	  return utilRebind(wiki, dispatch, 'on');
+	}
 
+	function uiFieldWikipedia(field, context) {
+	  var _arguments = arguments;
+	  var dispatch = dispatch$8('change');
+	  var wikipedia = services.wikipedia;
+	  var wikidata = services.wikidata;
 
-	        // Type
-	        if (type) {
-	            if (!typeField || typeField.id !== selected) {
-	                typeField = uiField(context, type, _entityIDs, { wrap: false })
-	                    .on('change', changeType);
-	            }
-	            typeField.tags(tags);
-	        } else {
-	            typeField = null;
-	        }
+	  var _langInput = select(null);
 
-	        var typeItem = list.selectAll('.structure-type-item')
-	            .data(typeField ? [typeField] : [], function(d) { return d.id; });
+	  var _titleInput = select(null);
 
-	        // Exit
-	        typeItem.exit()
-	            .remove();
+	  var _wikiURL = '';
 
-	        // Enter
-	        var typeEnter = typeItem.enter()
-	            .insert('li', ':first-child')
-	            .attr('class', 'labeled-input structure-type-item');
+	  var _entityIDs;
 
-	        typeEnter
-	            .append('span')
-	            .attr('class', 'label structure-label-type')
-	            .attr('for', 'preset-input-' + selected)
-	            .text(_t('inspector.radio.structure.type'));
+	  var _tags;
 
-	        typeEnter
-	            .append('div')
-	            .attr('class', 'structure-input-type-wrap');
+	  var _dataWikipedia = [];
+	  _mainFileFetcher.get('wmf_sitematrix').then(function (d) {
+	    _dataWikipedia = d;
+	    if (_tags) updateForTags(_tags);
+	  })["catch"](function () {
+	    /* ignore */
+	  });
+	  var langCombo = uiCombobox(context, 'wikipedia-lang').fetcher(function (value, callback) {
+	    var v = value.toLowerCase();
+	    callback(_dataWikipedia.filter(function (d) {
+	      return d[0].toLowerCase().indexOf(v) >= 0 || d[1].toLowerCase().indexOf(v) >= 0 || d[2].toLowerCase().indexOf(v) >= 0;
+	    }).map(function (d) {
+	      return {
+	        value: d[1]
+	      };
+	    }));
+	  });
+	  var titleCombo = uiCombobox(context, 'wikipedia-title').fetcher(function (value, callback) {
+	    if (!value) {
+	      value = '';
 
-	        // Update
-	        typeItem = typeItem
-	            .merge(typeEnter);
+	      for (var i in _entityIDs) {
+	        var entity = context.hasEntity(_entityIDs[i]);
 
-	        if (typeField) {
-	            typeItem.selectAll('.structure-input-type-wrap')
-	                .call(typeField.render);
+	        if (entity.tags.name) {
+	          value = entity.tags.name;
+	          break;
 	        }
+	      }
+	    }
 
+	    var searchfn = value.length > 7 ? wikipedia.search : wikipedia.suggestions;
+	    searchfn(language()[2], value, function (query, data) {
+	      callback(data.map(function (d) {
+	        return {
+	          value: d
+	        };
+	      }));
+	    });
+	  });
 
-	        // Layer
-	        if (layer && showLayer) {
-	            if (!layerField) {
-	                layerField = uiField(context, layer, _entityIDs, { wrap: false })
-	                    .on('change', changeLayer);
-	            }
-	            layerField.tags(tags);
-	            field.keys = utilArrayUnion(field.keys, ['layer']);
-	        } else {
-	            layerField = null;
-	            field.keys = field.keys.filter(function(k) { return k !== 'layer'; });
-	        }
+	  function wiki(selection) {
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', "form-field-input-wrap form-field-input-".concat(field.type)).merge(wrap);
+	    var langContainer = wrap.selectAll('.wiki-lang-container').data([0]);
+	    langContainer = langContainer.enter().append('div').attr('class', 'wiki-lang-container').merge(langContainer);
+	    _langInput = langContainer.selectAll('input.wiki-lang').data([0]);
+	    _langInput = _langInput.enter().append('input').attr('type', 'text').attr('class', 'wiki-lang').attr('placeholder', _t('translate.localized_translation_language')).call(utilNoAuto).call(langCombo).merge(_langInput);
+
+	    _langInput.on('blur', changeLang).on('change', changeLang);
+
+	    var titleContainer = wrap.selectAll('.wiki-title-container').data([0]);
+	    titleContainer = titleContainer.enter().append('div').attr('class', 'wiki-title-container').merge(titleContainer);
+	    _titleInput = titleContainer.selectAll('input.wiki-title').data([0]);
+	    _titleInput = _titleInput.enter().append('input').attr('type', 'text').attr('class', 'wiki-title').attr('id', field.domId).call(utilNoAuto).call(titleCombo).merge(_titleInput);
+
+	    _titleInput.on('blur', function () {
+	      change(true);
+	    }).on('change', function () {
+	      change(false);
+	    });
+
+	    var link = titleContainer.selectAll('.wiki-link').data([0]);
+	    link = link.enter().append('button').attr('class', 'form-field-button wiki-link').attr('title', _t('icons.view_on', {
+	      domain: 'wikipedia.org'
+	    })).call(svgIcon('#iD-icon-out-link')).merge(link);
+	    link.on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      if (_wikiURL) window.open(_wikiURL, '_blank');
+	    });
+	  }
 
-	        var layerItem = list.selectAll('.structure-layer-item')
-	            .data(layerField ? [layerField] : []);
+	  function defaultLanguageInfo(skipEnglishFallback) {
+	    var langCode = _mainLocalizer.languageCode().toLowerCase();
 
-	        // Exit
-	        layerItem.exit()
-	            .remove();
+	    for (var i in _dataWikipedia) {
+	      var d = _dataWikipedia[i]; // default to the language of iD's current locale
 
-	        // Enter
-	        var layerEnter = layerItem.enter()
-	            .append('li')
-	            .attr('class', 'labeled-input structure-layer-item');
+	      if (d[2] === langCode) return d;
+	    } // fallback to English
 
-	        layerEnter
-	            .append('span')
-	            .attr('class', 'label structure-label-layer')
-	            .attr('for', 'preset-input-layer')
-	            .text(_t('inspector.radio.structure.layer'));
 
-	        layerEnter
-	            .append('div')
-	            .attr('class', 'structure-input-layer-wrap');
+	    return skipEnglishFallback ? ['', '', ''] : ['English', 'English', 'en'];
+	  }
 
-	        // Update
-	        layerItem = layerItem
-	            .merge(layerEnter);
+	  function language(skipEnglishFallback) {
+	    var value = utilGetSetValue(_langInput).toLowerCase();
 
-	        if (layerField) {
-	            layerItem.selectAll('.structure-input-layer-wrap')
-	                .call(layerField.render);
-	        }
-	    }
+	    for (var i in _dataWikipedia) {
+	      var d = _dataWikipedia[i]; // return the language already set in the UI, if supported
 
+	      if (d[0].toLowerCase() === value || d[1].toLowerCase() === value || d[2] === value) return d;
+	    } // fallback to English
 
-	    function changeType(t, onInput) {
-	        var key = selectedKey();
-	        if (!key) { return; }
 
-	        var val = t[key];
-	        if (val !== 'no') {
-	            _oldType[key] = val;
-	        }
+	    return defaultLanguageInfo(skipEnglishFallback);
+	  }
 
-	        if (field.type === 'structureRadio') {
-	            // remove layer if it should not be set
-	            if (val === 'no' ||
-	                (key !== 'bridge' && key !== 'tunnel') ||
-	                (key === 'tunnel' && val === 'building_passage')) {
-	                t.layer = undefined;
-	            }
-	            // add layer if it should be set
-	            if (t.layer === undefined) {
-	                if (key === 'bridge' && val !== 'no') {
-	                    t.layer = '1';
-	                }
-	                if (key === 'tunnel' && val !== 'no' && val !== 'building_passage') {
-	                    t.layer = '-1';
-	                }
-	            }
-	         }
+	  function changeLang() {
+	    utilGetSetValue(_langInput, language()[1]);
+	    change(true);
+	  }
 
-	        dispatch$1.call('change', this, t, onInput);
-	    }
+	  function change(skipWikidata) {
+	    var value = utilGetSetValue(_titleInput);
+	    var m = value.match(/https?:\/\/([-a-z]+)\.wikipedia\.org\/(?:wiki|\1-[-a-z]+)\/([^#]+)(?:#(.+))?/);
 
+	    var langInfo = m && _dataWikipedia.find(function (d) {
+	      return m[1] === d[2];
+	    });
 
-	    function changeLayer(t, onInput) {
-	        if (t.layer === '0') {
-	            t.layer = undefined;
-	        }
-	        dispatch$1.call('change', this, t, onInput);
-	    }
+	    var syncTags = {};
 
+	    if (langInfo) {
+	      var nativeLangName = langInfo[1]; // Normalize title http://www.mediawiki.org/wiki/API:Query#Title_normalization
 
-	    function changeRadio() {
-	        var t = {};
-	        var activeKey;
+	      value = decodeURIComponent(m[2]).replace(/_/g, ' ');
 
-	        if (field.key) {
-	            t[field.key] = undefined;
-	        }
+	      if (m[3]) {
+	        var anchor; // try {
+	        // leave this out for now - #6232
+	        // Best-effort `anchordecode:` implementation
+	        // anchor = decodeURIComponent(m[3].replace(/\.([0-9A-F]{2})/g, '%$1'));
+	        // } catch (e) {
 
-	        radios.each(function(d) {
-	            var active = select(this).property('checked');
-	            if (active) { activeKey = d; }
+	        anchor = decodeURIComponent(m[3]); // }
 
-	            if (field.key) {
-	                if (active) { t[field.key] = d; }
-	            } else {
-	                var val = _oldType[activeKey] || 'yes';
-	                t[d] = active ? val : undefined;
-	            }
-	        });
+	        value += '#' + anchor.replace(/_/g, ' ');
+	      }
 
-	        if (field.type === 'structureRadio') {
-	            if (activeKey === 'bridge') {
-	                t.layer = '1';
-	            } else if (activeKey === 'tunnel' && t.tunnel !== 'building_passage') {
-	                t.layer = '-1';
-	            } else {
-	                t.layer = undefined;
-	            }
-	        }
+	      value = value.slice(0, 1).toUpperCase() + value.slice(1);
+	      utilGetSetValue(_langInput, nativeLangName);
+	      utilGetSetValue(_titleInput, value);
+	    }
 
-	        dispatch$1.call('change', this, t);
+	    if (value) {
+	      syncTags.wikipedia = context.cleanTagValue(language()[2] + ':' + value);
+	    } else {
+	      syncTags.wikipedia = undefined;
 	    }
 
+	    dispatch.call('change', this, syncTags);
+	    if (skipWikidata || !value || !language()[2]) return; // attempt asynchronous update of wikidata tag..
 
-	    radio.tags = function(tags) {
+	    var initGraph = context.graph();
+	    var initEntityIDs = _entityIDs;
+	    wikidata.itemsByTitle(language()[2], value, function (err, data) {
+	      if (err || !data || !Object.keys(data).length) return; // If graph has changed, we can't apply this update.
 
-	        radios.property('checked', function(d) {
-	            if (field.key) {
-	                return tags[field.key] === d;
-	            }
-	            return !!(typeof tags[d] === 'string' && tags[d].toLowerCase() !== 'no');
-	        });
+	      if (context.graph() !== initGraph) return;
+	      var qids = Object.keys(data);
+	      var value = qids && qids.find(function (id) {
+	        return id.match(/^Q\d+$/);
+	      });
+	      var actions = initEntityIDs.map(function (entityID) {
+	        var entity = context.entity(entityID).tags;
+	        var currTags = Object.assign({}, entity); // shallow copy
 
-	        function isMixed(d) {
-	            if (field.key) {
-	                return Array.isArray(tags[field.key]) && tags[field.key].includes(d);
-	            }
-	            return Array.isArray(tags[d]);
+	        if (currTags.wikidata !== value) {
+	          currTags.wikidata = value;
+	          return actionChangeTags(entityID, currTags);
 	        }
 
-	        labels
-	            .classed('active', function(d) {
-	                if (field.key) {
-	                    return (Array.isArray(tags[field.key]) && tags[field.key].includes(d))
-	                        || tags[field.key] === d;
-	                }
-	                return Array.isArray(tags[d]) || !!(tags[d] && tags[d].toLowerCase() !== 'no');
-	            })
-	            .classed('mixed', isMixed)
-	            .attr('title', function(d) {
-	                return isMixed(d) ? _t('inspector.unshared_value_tooltip') : null;
-	            });
+	        return null;
+	      }).filter(Boolean);
+	      if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change
 
+	      context.overwrite(function actionUpdateWikidataTags(graph) {
+	        actions.forEach(function (action) {
+	          graph = action(graph);
+	        });
+	        return graph;
+	      }, context.history().undoAnnotation()); // do not dispatch.call('change') here, because entity_editor
+	      // changeTags() is not intended to be called asynchronously
+	    });
+	  }
 
-	        var selection = radios.filter(function() { return this.checked; });
+	  wiki.tags = function (tags) {
+	    _tags = tags;
+	    updateForTags(tags);
+	  };
 
-	        if (selection.empty()) {
-	            placeholder.text(_t('inspector.none'));
-	        } else {
-	            placeholder.text(selection.attr('value'));
-	            _oldType[selection.datum()] = tags[selection.datum()];
-	        }
+	  function updateForTags(tags) {
+	    var value = typeof tags[field.key] === 'string' ? tags[field.key] : ''; // Expect tag format of `tagLang:tagArticleTitle`, e.g. `fr:Paris`, with
+	    // optional suffix of `#anchor`
 
-	        if (field.type === 'structureRadio') {
-	            // For waterways without a tunnel tag, set 'culvert' as
-	            // the _oldType to default to if the user picks 'tunnel'
-	            if (!!tags.waterway && !_oldType.tunnel) {
-	                _oldType.tunnel = 'culvert';
-	            }
+	    var m = value.match(/([^:]+):([^#]+)(?:#(.+))?/);
+	    var tagLang = m && m[1];
+	    var tagArticleTitle = m && m[2];
+	    var anchor = m && m[3];
 
-	            wrap.call(structureExtras, tags);
-	        }
-	    };
+	    var tagLangInfo = tagLang && _dataWikipedia.find(function (d) {
+	      return tagLang === d[2];
+	    }); // value in correct format
 
 
-	    radio.focus = function() {
-	        radios.node().focus();
-	    };
+	    if (tagLangInfo) {
+	      var nativeLangName = tagLangInfo[1];
+	      utilGetSetValue(_langInput, nativeLangName);
+	      utilGetSetValue(_titleInput, tagArticleTitle + (anchor ? '#' + anchor : ''));
 
+	      if (anchor) {
+	        try {
+	          // Best-effort `anchorencode:` implementation
+	          anchor = encodeURIComponent(anchor.replace(/ /g, '_')).replace(/%/g, '.');
+	        } catch (e) {
+	          anchor = anchor.replace(/ /g, '_');
+	        }
+	      }
 
-	    radio.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        _oldType = {};
-	        return radio;
-	    };
+	      _wikiURL = 'https://' + tagLang + '.wikipedia.org/wiki/' + tagArticleTitle.replace(/ /g, '_') + (anchor ? '#' + anchor : ''); // unrecognized value format
+	    } else {
+	      utilGetSetValue(_titleInput, value);
 
+	      if (value && value !== '') {
+	        utilGetSetValue(_langInput, '');
+	        var defaultLangInfo = defaultLanguageInfo();
+	        _wikiURL = "https://".concat(defaultLangInfo[2], ".wikipedia.org/w/index.php?fulltext=1&search=").concat(value);
+	      } else {
+	        var shownOrDefaultLangInfo = language(true
+	        /* skipEnglishFallback */
+	        );
+	        utilGetSetValue(_langInput, shownOrDefaultLangInfo[1]);
+	        _wikiURL = '';
+	      }
+	    }
+	  }
 
-	    radio.isAllowed = function() {
-	        return _entityIDs.length === 1;
-	    };
+	  wiki.entityIDs = function (val) {
+	    if (!_arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return wiki;
+	  };
 
+	  wiki.focus = function () {
+	    _titleInput.node().focus();
+	  };
 
-	    return utilRebind(radio, dispatch$1, 'on');
+	  return utilRebind(wiki, dispatch, 'on');
 	}
+	uiFieldWikipedia.supportsMultiselection = false;
 
-	function uiFieldRestrictions(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var breathe = behaviorBreathe();
-
-	    corePreferences('turn-restriction-via-way', null);                 // remove old key
-	    var storedViaWay = corePreferences('turn-restriction-via-way0');   // use new key #6922
-	    var storedDistance = corePreferences('turn-restriction-distance');
-
-	    var _maxViaWay = storedViaWay !== null ? (+storedViaWay) : 0;
-	    var _maxDistance = storedDistance ? (+storedDistance) : 30;
-	    var _initialized = false;
-	    var _parent = select(null);       // the entire field
-	    var _container = select(null);    // just the map
-	    var _oldTurns;
-	    var _graph;
-	    var _vertexID;
-	    var _intersection;
-	    var _fromWayID;
-
-	    var _lastXPos;
-
-
-	    function restrictions(selection) {
-	        _parent = selection;
-
-	        // try to reuse the intersection, but always rebuild it if the graph has changed
-	        if (_vertexID && (context.graph() !== _graph || !_intersection)) {
-	            _graph = context.graph();
-	            _intersection = osmIntersection(_graph, _vertexID, _maxDistance);
-	        }
-
-	        // It's possible for there to be no actual intersection here.
-	        // for example, a vertex of two `highway=path`
-	        // In this case, hide the field.
-	        var isOK = (
-	            _intersection &&
-	            _intersection.vertices.length &&           // has vertices
-	            _intersection.vertices                     // has the vertex that the user selected
-	                .filter(function(vertex) { return vertex.id === _vertexID; }).length &&
-	            _intersection.ways.length > 2 &&           // has more than 2 ways
-	            _intersection.ways                         // has more than 1 TO way
-	                .filter(function(way) { return way.__to; }).length > 1
-	        );
+	var uiFields = {
+	  access: uiFieldAccess,
+	  address: uiFieldAddress,
+	  check: uiFieldCheck,
+	  combo: uiFieldCombo,
+	  cycleway: uiFieldCycleway,
+	  defaultCheck: uiFieldCheck,
+	  email: uiFieldText,
+	  identifier: uiFieldText,
+	  lanes: uiFieldLanes,
+	  localized: uiFieldLocalized,
+	  roadheight: uiFieldRoadheight,
+	  roadspeed: uiFieldRoadspeed,
+	  manyCombo: uiFieldCombo,
+	  multiCombo: uiFieldCombo,
+	  networkCombo: uiFieldCombo,
+	  number: uiFieldText,
+	  onewayCheck: uiFieldCheck,
+	  radio: uiFieldRadio,
+	  restrictions: uiFieldRestrictions,
+	  semiCombo: uiFieldCombo,
+	  structureRadio: uiFieldRadio,
+	  tel: uiFieldText,
+	  text: uiFieldText,
+	  textarea: uiFieldTextarea,
+	  typeCombo: uiFieldCombo,
+	  url: uiFieldText,
+	  wikidata: uiFieldWikidata,
+	  wikipedia: uiFieldWikipedia
+	};
 
-	        // Also hide in the case where
-	        select(selection.node().parentNode).classed('hide', !isOK);
+	function uiField(context, presetField, entityIDs, options) {
+	  options = Object.assign({
+	    show: true,
+	    wrap: true,
+	    remove: true,
+	    revert: true,
+	    info: true
+	  }, options);
+	  var dispatch = dispatch$8('change', 'revert');
+	  var field = Object.assign({}, presetField); // shallow copy
 
-	        // if form field is hidden or has detached from dom, clean up.
-	        if (!isOK ||
-	            !context.container().select('.inspector-wrap.inspector-hidden').empty() ||
-	            !selection.node().parentNode ||
-	            !selection.node().parentNode.parentNode) {
-	            selection.call(restrictions.off);
-	            return;
-	        }
+	  field.domId = utilUniqueDomId('form-field-' + field.safeid);
+	  var _show = options.show;
+	  var _state = '';
+	  var _tags = {};
 
+	  var _entityExtent;
 
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	  if (entityIDs && entityIDs.length) {
+	    _entityExtent = entityIDs.reduce(function (extent, entityID) {
+	      var entity = context.graph().entity(entityID);
+	      return extent.extend(entity.extent(context.graph()));
+	    }, geoExtent());
+	  }
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
+	  var _locked = false;
 
-	        var container = wrap.selectAll('.restriction-container')
-	            .data([0]);
+	  var _lockedTip = uiTooltip().title(_t.html('inspector.lock.suggestion', {
+	    label: field.label
+	  })).placement('bottom');
 
-	        // enter
-	        var containerEnter = container.enter()
-	            .append('div')
-	            .attr('class', 'restriction-container');
+	  field.keys = field.keys || [field.key]; // only create the fields that are actually being shown
 
-	        containerEnter
-	            .append('div')
-	            .attr('class', 'restriction-help');
+	  if (_show && !field.impl) {
+	    createField();
+	  } // Creates the field.. This is done lazily,
+	  // once we know that the field will be shown.
 
-	        // update
-	        _container = containerEnter
-	            .merge(container)
-	            .call(renderViewer);
 
-	        var controls = wrap.selectAll('.restriction-controls')
-	            .data([0]);
+	  function createField() {
+	    field.impl = uiFields[field.type](field, context).on('change', function (t, onInput) {
+	      dispatch.call('change', field, t, onInput);
+	    });
 
-	        // enter/update
-	        controls.enter()
-	            .append('div')
-	            .attr('class', 'restriction-controls-container')
-	            .append('div')
-	            .attr('class', 'restriction-controls')
-	            .merge(controls)
-	            .call(renderControls);
-	    }
+	    if (entityIDs) {
+	      field.entityIDs = entityIDs; // if this field cares about the entities, pass them along
 
+	      if (field.impl.entityIDs) {
+	        field.impl.entityIDs(entityIDs);
+	      }
+	    }
+	  }
 
-	    function renderControls(selection) {
-	        var distControl = selection.selectAll('.restriction-distance')
-	            .data([0]);
+	  function isModified() {
+	    if (!entityIDs || !entityIDs.length) return false;
+	    return entityIDs.some(function (entityID) {
+	      var original = context.graph().base().entities[entityID];
+	      var latest = context.graph().entity(entityID);
+	      return field.keys.some(function (key) {
+	        return original ? latest.tags[key] !== original.tags[key] : latest.tags[key];
+	      });
+	    });
+	  }
 
-	        distControl.exit()
-	            .remove();
+	  function tagsContainFieldKey() {
+	    return field.keys.some(function (key) {
+	      if (field.type === 'multiCombo') {
+	        for (var tagKey in _tags) {
+	          if (tagKey.indexOf(key) === 0) {
+	            return true;
+	          }
+	        }
 
-	        var distControlEnter = distControl.enter()
-	            .append('div')
-	            .attr('class', 'restriction-control restriction-distance');
-
-	        distControlEnter
-	            .append('span')
-	            .attr('class', 'restriction-control-label restriction-distance-label')
-	            .text(_t('restriction.controls.distance') + ':');
-
-	        distControlEnter
-	            .append('input')
-	            .attr('class', 'restriction-distance-input')
-	            .attr('type', 'range')
-	            .attr('min', '20')
-	            .attr('max', '50')
-	            .attr('step', '5');
-
-	        distControlEnter
-	            .append('span')
-	            .attr('class', 'restriction-distance-text');
-
-	        // update
-	        selection.selectAll('.restriction-distance-input')
-	            .property('value', _maxDistance)
-	            .on('input', function() {
-	                var val = select(this).property('value');
-	                _maxDistance = +val;
-	                _intersection = null;
-	                _container.selectAll('.layer-osm .layer-turns *').remove();
-	                corePreferences('turn-restriction-distance', _maxDistance);
-	                _parent.call(restrictions);
-	            });
+	        return false;
+	      }
 
-	        selection.selectAll('.restriction-distance-text')
-	            .text(displayMaxDistance(_maxDistance));
+	      return _tags[key] !== undefined;
+	    });
+	  }
 
+	  function revert(d3_event, d) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	    if (!entityIDs || _locked) return;
+	    dispatch.call('revert', d, d.keys);
+	  }
 
-	        var viaControl = selection.selectAll('.restriction-via-way')
-	            .data([0]);
+	  function remove(d3_event, d) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	    if (_locked) return;
+	    var t = {};
+	    d.keys.forEach(function (key) {
+	      t[key] = undefined;
+	    });
+	    dispatch.call('change', d, t);
+	  }
 
-	        viaControl.exit()
-	            .remove();
+	  field.render = function (selection) {
+	    var container = selection.selectAll('.form-field').data([field]); // Enter
 
-	        var viaControlEnter = viaControl.enter()
-	            .append('div')
-	            .attr('class', 'restriction-control restriction-via-way');
-
-	        viaControlEnter
-	            .append('span')
-	            .attr('class', 'restriction-control-label restriction-via-way-label')
-	            .text(_t('restriction.controls.via') + ':');
-
-	        viaControlEnter
-	            .append('input')
-	            .attr('class', 'restriction-via-way-input')
-	            .attr('type', 'range')
-	            .attr('min', '0')
-	            .attr('max', '2')
-	            .attr('step', '1');
-
-	        viaControlEnter
-	            .append('span')
-	            .attr('class', 'restriction-via-way-text');
-
-	        // update
-	        selection.selectAll('.restriction-via-way-input')
-	            .property('value', _maxViaWay)
-	            .on('input', function() {
-	                var val = select(this).property('value');
-	                _maxViaWay = +val;
-	                _container.selectAll('.layer-osm .layer-turns *').remove();
-	                corePreferences('turn-restriction-via-way0', _maxViaWay);
-	                _parent.call(restrictions);
-	            });
+	    var enter = container.enter().append('div').attr('class', function (d) {
+	      return 'form-field form-field-' + d.safeid;
+	    }).classed('nowrap', !options.wrap);
 
-	        selection.selectAll('.restriction-via-way-text')
-	            .text(displayMaxVia(_maxViaWay));
-	    }
+	    if (options.wrap) {
+	      var labelEnter = enter.append('label').attr('class', 'field-label').attr('for', function (d) {
+	        return d.domId;
+	      });
+	      var textEnter = labelEnter.append('span').attr('class', 'label-text');
+	      textEnter.append('span').attr('class', 'label-textvalue').html(function (d) {
+	        return d.label();
+	      });
+	      textEnter.append('span').attr('class', 'label-textannotation');
 
+	      if (options.remove) {
+	        labelEnter.append('button').attr('class', 'remove-icon').attr('title', _t('icons.remove')).call(svgIcon('#iD-operation-delete'));
+	      }
 
-	    function renderViewer(selection) {
-	        if (!_intersection) { return; }
+	      if (options.revert) {
+	        labelEnter.append('button').attr('class', 'modified-icon').attr('title', _t('icons.undo')).call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-redo' : '#iD-icon-undo'));
+	      }
+	    } // Update
 
-	        var vgraph = _intersection.graph;
-	        var filter = utilFunctor(true);
-	        var projection = geoRawMercator();
 
-	        // Reflow warning: `utilGetDimensions` calls `getBoundingClientRect`
-	        // Instead of asking the restriction-container for its dimensions,
-	        //  we can ask the .sidebar, which can have its dimensions cached.
-	        // width: calc as sidebar - padding
-	        // height: hardcoded (from `80_app.css`)
-	        // var d = utilGetDimensions(selection);
-	        var sdims = utilGetDimensions(context.container().select('.sidebar'));
-	        var d = [ sdims[0] - 50, 370 ];
-	        var c = geoVecScale(d, 0.5);
-	        var z = 22;
+	    container = container.merge(enter);
+	    container.select('.field-label > .remove-icon') // propagate bound data
+	    .on('click', remove);
+	    container.select('.field-label > .modified-icon') // propagate bound data
+	    .on('click', revert);
+	    container.each(function (d) {
+	      var selection = select(this);
 
-	        projection.scale(geoZoomToScale(z));
+	      if (!d.impl) {
+	        createField();
+	      }
 
-	        // Calculate extent of all key vertices
-	        var extent = geoExtent();
-	        for (var i = 0; i < _intersection.vertices.length; i++) {
-	            extent._extend(_intersection.vertices[i].extent());
-	        }
+	      var reference, help; // instantiate field help
 
-	        // If this is a large intersection, adjust zoom to fit extent
-	        if (_intersection.vertices.length > 1) {
-	            var padding = 180;   // in z22 pixels
-	            var tl = projection([extent[0][0], extent[1][1]]);
-	            var br = projection([extent[1][0], extent[0][1]]);
-	            var hFactor = (br[0] - tl[0]) / (d[0] - padding);
-	            var vFactor = (br[1] - tl[1]) / (d[1] - padding);
-	            var hZoomDiff = Math.log(Math.abs(hFactor)) / Math.LN2;
-	            var vZoomDiff = Math.log(Math.abs(vFactor)) / Math.LN2;
-	            z = z - Math.max(hZoomDiff, vZoomDiff);
-	            projection.scale(geoZoomToScale(z));
-	        }
+	      if (options.wrap && field.type === 'restrictions') {
+	        help = uiFieldHelp(context, 'restrictions');
+	      } // instantiate tag reference
 
-	        var padTop = 35;   // reserve top space for hint text
-	        var extentCenter = projection(extent.center());
-	        extentCenter[1] = extentCenter[1] - padTop;
 
-	        projection
-	            .translate(geoVecSubtract(c, extentCenter))
-	            .clipExtent([[0, 0], d]);
+	      if (options.wrap && options.info) {
+	        var referenceKey = d.key || '';
 
-	        var drawLayers = svgLayers(projection, context).only(['osm','touch']).dimensions(d);
-	        var drawVertices = svgVertices(projection, context);
-	        var drawLines = svgLines(projection, context);
-	        var drawTurns = svgTurns(projection, context);
+	        if (d.type === 'multiCombo') {
+	          // lookup key without the trailing ':'
+	          referenceKey = referenceKey.replace(/:$/, '');
+	        }
 
-	        var firstTime = selection.selectAll('.surface').empty();
+	        reference = uiTagReference(d.reference || {
+	          key: referenceKey
+	        });
 
-	        selection
-	            .call(drawLayers);
+	        if (_state === 'hover') {
+	          reference.showing(false);
+	        }
+	      }
 
-	        var surface = selection.selectAll('.surface')
-	            .classed('tr', true);
+	      selection.call(d.impl); // add field help components
 
-	        if (firstTime) {
-	            _initialized = true;
+	      if (help) {
+	        selection.call(help.body).select('.field-label').call(help.button);
+	      } // add tag reference components
 
-	            surface
-	                .call(breathe);
-	        }
 
-	        // This can happen if we've lowered the detail while a FROM way
-	        // is selected, and that way is no longer part of the intersection.
-	        if (_fromWayID && !vgraph.hasEntity(_fromWayID)) {
-	            _fromWayID = null;
-	            _oldTurns = null;
-	        }
+	      if (reference) {
+	        selection.call(reference.body).select('.field-label').call(reference.button);
+	      }
 
-	        surface
-	            .call(utilSetDimensions, d)
-	            .call(drawVertices, vgraph, _intersection.vertices, filter, extent, z)
-	            .call(drawLines, vgraph, _intersection.ways, filter)
-	            .call(drawTurns, vgraph, _intersection.turns(_fromWayID, _maxViaWay));
+	      d.impl.tags(_tags);
+	    });
+	    container.classed('locked', _locked).classed('modified', isModified()).classed('present', tagsContainFieldKey()); // show a tip and lock icon if the field is locked
 
-	        surface
-	            .on('click.restrictions', click)
-	            .on('mouseover.restrictions', mouseover);
+	    var annotation = container.selectAll('.field-label .label-textannotation');
+	    var icon = annotation.selectAll('.icon').data(_locked ? [0] : []);
+	    icon.exit().remove();
+	    icon.enter().append('svg').attr('class', 'icon').append('use').attr('xlink:href', '#fas-lock');
+	    container.call(_locked ? _lockedTip : _lockedTip.destroy);
+	  };
 
-	        surface
-	            .selectAll('.selected')
-	            .classed('selected', false);
+	  field.state = function (val) {
+	    if (!arguments.length) return _state;
+	    _state = val;
+	    return field;
+	  };
 
-	        surface
-	            .selectAll('.related')
-	            .classed('related', false);
+	  field.tags = function (val) {
+	    if (!arguments.length) return _tags;
+	    _tags = val;
 
-	        if (_fromWayID) {
-	            var way = vgraph.entity(_fromWayID);
-	            surface
-	                .selectAll('.' + _fromWayID)
-	                .classed('selected', true)
-	                .classed('related', true);
-	        }
+	    if (tagsContainFieldKey() && !_show) {
+	      // always show a field if it has a value to display
+	      _show = true;
 
-	        document.addEventListener('resizeWindow', function () {
-	            utilSetDimensions(_container, null);
-	            redraw(1);
-	        }, false);
+	      if (!field.impl) {
+	        createField();
+	      }
+	    }
 
-	        updateHints(null);
+	    return field;
+	  };
 
+	  field.locked = function (val) {
+	    if (!arguments.length) return _locked;
+	    _locked = val;
+	    return field;
+	  };
 
-	        function click() {
-	            surface
-	                .call(breathe.off)
-	                .call(breathe);
+	  field.show = function () {
+	    _show = true;
 
-	            var datum = event.target.__data__;
-	            var entity = datum && datum.properties && datum.properties.entity;
-	            if (entity) {
-	                datum = entity;
-	            }
+	    if (!field.impl) {
+	      createField();
+	    }
 
-	            if (datum instanceof osmWay && (datum.__from || datum.__via)) {
-	                _fromWayID = datum.id;
-	                _oldTurns = null;
-	                redraw();
-
-	            } else if (datum instanceof osmTurn) {
-	                var actions, extraActions, turns, i;
-	                var restrictionType = osmInferRestriction(vgraph, datum, projection);
-
-	                if (datum.restrictionID && !datum.direct) {
-	                    return;
-
-	                } else if (datum.restrictionID && !datum.only) {    // NO -> ONLY
-	                    var seen = {};
-	                    var datumOnly = JSON.parse(JSON.stringify(datum));   // deep clone the datum
-	                    datumOnly.only = true;                               // but change this property
-	                    restrictionType = restrictionType.replace(/^no/, 'only');
-
-	                    // Adding an ONLY restriction should destroy all other direct restrictions from the FROM towards the VIA.
-	                    // We will remember them in _oldTurns, and restore them if the user clicks again.
-	                    turns = _intersection.turns(_fromWayID, 2);
-	                    extraActions = [];
-	                    _oldTurns = [];
-	                    for (i = 0; i < turns.length; i++) {
-	                        var turn = turns[i];
-	                        if (seen[turn.restrictionID]) { continue; }  // avoid deleting the turn twice (#4968, #4928)
-
-	                        if (turn.direct && turn.path[1] === datum.path[1]) {
-	                            seen[turns[i].restrictionID] = true;
-	                            turn.restrictionType = osmInferRestriction(vgraph, turn, projection);
-	                            _oldTurns.push(turn);
-	                            extraActions.push(actionUnrestrictTurn(turn));
-	                        }
-	                    }
+	    if (field["default"] && field.key && _tags[field.key] !== field["default"]) {
+	      var t = {};
+	      t[field.key] = field["default"];
+	      dispatch.call('change', this, t);
+	    }
+	  }; // A shown field has a visible UI, a non-shown field is in the 'Add field' dropdown
 
-	                    actions = _intersection.actions.concat(extraActions, [
-	                        actionRestrictTurn(datumOnly, restrictionType),
-	                        _t('operations.restriction.annotation.create')
-	                    ]);
-
-	                } else if (datum.restrictionID) {   // ONLY -> Allowed
-	                    // Restore whatever restrictions we might have destroyed by cycling thru the ONLY state.
-	                    // This relies on the assumption that the intersection was already split up when we
-	                    // performed the previous action (NO -> ONLY), so the IDs in _oldTurns shouldn't have changed.
-	                    turns = _oldTurns || [];
-	                    extraActions = [];
-	                    for (i = 0; i < turns.length; i++) {
-	                        if (turns[i].key !== datum.key) {
-	                            extraActions.push(actionRestrictTurn(turns[i], turns[i].restrictionType));
-	                        }
-	                    }
-	                    _oldTurns = null;
-
-	                    actions = _intersection.actions.concat(extraActions, [
-	                        actionUnrestrictTurn(datum),
-	                        _t('operations.restriction.annotation.delete')
-	                    ]);
-
-	                } else {    // Allowed -> NO
-	                    actions = _intersection.actions.concat([
-	                        actionRestrictTurn(datum, restrictionType),
-	                        _t('operations.restriction.annotation.create')
-	                    ]);
-	                }
 
-	                context.perform.apply(context, actions);
+	  field.isShown = function () {
+	    return _show;
+	  }; // An allowed field can appear in the UI or in the 'Add field' dropdown.
+	  // A non-allowed field is hidden from the user altogether
 
-	                // At this point the datum will be changed, but will have same key..
-	                // Refresh it and update the help..
-	                var s = surface.selectAll('.' + datum.key);
-	                datum = s.empty() ? null : s.datum();
-	                updateHints(datum);
 
-	            } else {
-	                _fromWayID = null;
-	                _oldTurns = null;
-	                redraw();
-	            }
-	        }
+	  field.isAllowed = function () {
+	    if (entityIDs && entityIDs.length > 1 && uiFields[field.type].supportsMultiselection === false) return false;
+	    if (field.geometry && !entityIDs.every(function (entityID) {
+	      return field.matchGeometry(context.graph().geometry(entityID));
+	    })) return false;
 
+	    if (entityIDs && _entityExtent && field.locationSetID) {
+	      // is field allowed in this location?
+	      var validLocations = _mainLocations.locationsAt(_entityExtent.center());
+	      if (!validLocations[field.locationSetID]) return false;
+	    }
 
-	        function mouseover() {
-	            var datum = event.target.__data__;
-	            updateHints(datum);
-	        }
+	    var prerequisiteTag = field.prerequisiteTag;
 
-	        _lastXPos = _lastXPos || sdims[0];
+	    if (entityIDs && !tagsContainFieldKey() && // ignore tagging prerequisites if a value is already present
+	    prerequisiteTag) {
+	      if (!entityIDs.every(function (entityID) {
+	        var entity = context.graph().entity(entityID);
 
-	        function redraw(minChange) {
-	            var xPos = -1;
+	        if (prerequisiteTag.key) {
+	          var value = entity.tags[prerequisiteTag.key];
+	          if (!value) return false;
 
-	            if (minChange) {
-	                xPos = utilGetDimensions(context.container().select('.sidebar'))[0];
-	            }
+	          if (prerequisiteTag.valueNot) {
+	            return prerequisiteTag.valueNot !== value;
+	          }
 
-	            if (!minChange || (minChange && Math.abs(xPos - _lastXPos) >= minChange)) {
-	                if (context.hasEntity(_vertexID)) {
-	                    _lastXPos = xPos;
-	                    _container.call(renderViewer);
-	                }
-	            }
+	          if (prerequisiteTag.value) {
+	            return prerequisiteTag.value === value;
+	          }
+	        } else if (prerequisiteTag.keyNot) {
+	          if (entity.tags[prerequisiteTag.keyNot]) return false;
 	        }
 
+	        return true;
+	      })) return false;
+	    }
 
-	        function highlightPathsFrom(wayID) {
-	            surface.selectAll('.related')
-	                .classed('related', false)
-	                .classed('allow', false)
-	                .classed('restrict', false)
-	                .classed('only', false);
-
-	            surface.selectAll('.' + wayID)
-	                .classed('related', true);
+	    return true;
+	  };
 
-	            if (wayID) {
-	                var turns = _intersection.turns(wayID, _maxViaWay);
-	                for (var i = 0; i < turns.length; i++) {
-	                    var turn = turns[i];
-	                    var ids = [turn.to.way];
-	                    var klass = (turn.no ? 'restrict' : (turn.only ? 'only' : 'allow'));
+	  field.focus = function () {
+	    if (field.impl) {
+	      field.impl.focus();
+	    }
+	  };
 
-	                    if (turn.only || turns.length === 1) {
-	                        if (turn.via.ways) {
-	                            ids = ids.concat(turn.via.ways);
-	                        }
-	                    } else if (turn.to.way === wayID) {
-	                        continue;
-	                    }
+	  return utilRebind(field, dispatch, 'on');
+	}
 
-	                    surface.selectAll(utilEntitySelector(ids))
-	                        .classed('related', true)
-	                        .classed('allow', (klass === 'allow'))
-	                        .classed('restrict', (klass === 'restrict'))
-	                        .classed('only', (klass === 'only'));
-	                }
-	            }
-	        }
+	function uiFormFields(context) {
+	  var moreCombo = uiCombobox(context, 'more-fields').minItems(1);
+	  var _fieldsArr = [];
+	  var _lastPlaceholder = '';
+	  var _state = '';
+	  var _klass = '';
+
+	  function formFields(selection) {
+	    var allowedFields = _fieldsArr.filter(function (field) {
+	      return field.isAllowed();
+	    });
 
+	    var shown = allowedFields.filter(function (field) {
+	      return field.isShown();
+	    });
+	    var notShown = allowedFields.filter(function (field) {
+	      return !field.isShown();
+	    });
+	    var container = selection.selectAll('.form-fields-container').data([0]);
+	    container = container.enter().append('div').attr('class', 'form-fields-container ' + (_klass || '')).merge(container);
+	    var fields = container.selectAll('.wrap-form-field').data(shown, function (d) {
+	      return d.id + (d.entityIDs ? d.entityIDs.join() : '');
+	    });
+	    fields.exit().remove(); // Enter
 
-	        function updateHints(datum) {
-	            var help = _container.selectAll('.restriction-help').html('');
+	    var enter = fields.enter().append('div').attr('class', function (d) {
+	      return 'wrap-form-field wrap-form-field-' + d.safeid;
+	    }); // Update
 
-	            var placeholders = {};
-	            ['from', 'via', 'to'].forEach(function(k) {
-	                placeholders[k] = '<span class="qualifier">' + _t('restriction.help.' + k) + '</span>';
-	            });
+	    fields = fields.merge(enter);
+	    fields.order().each(function (d) {
+	      select(this).call(d.render);
+	    });
+	    var titles = [];
+	    var moreFields = notShown.map(function (field) {
+	      var title = field.title();
+	      titles.push(title);
+	      var terms = field.terms();
+	      if (field.key) terms.push(field.key);
+	      if (field.keys) terms = terms.concat(field.keys);
+	      return {
+	        display: field.label(),
+	        value: title,
+	        title: title,
+	        field: field,
+	        terms: terms
+	      };
+	    });
+	    var placeholder = titles.slice(0, 3).join(', ') + (titles.length > 3 ? '…' : '');
+	    var more = selection.selectAll('.more-fields').data(_state === 'hover' || moreFields.length === 0 ? [] : [0]);
+	    more.exit().remove();
+	    var moreEnter = more.enter().append('div').attr('class', 'more-fields').append('label');
+	    moreEnter.append('span').html(_t.html('inspector.add_fields'));
+	    more = moreEnter.merge(more);
+	    var input = more.selectAll('.value').data([0]);
+	    input.exit().remove();
+	    input = input.enter().append('input').attr('class', 'value').attr('type', 'text').attr('placeholder', placeholder).call(utilNoAuto).merge(input);
+	    input.call(utilGetSetValue, '').call(moreCombo.data(moreFields).on('accept', function (d) {
+	      if (!d) return; // user entered something that was not matched
+
+	      var field = d.field;
+	      field.show();
+	      selection.call(formFields); // rerender
+
+	      field.focus();
+	    })); // avoid updating placeholder excessively (triggers style recalc)
+
+	    if (_lastPlaceholder !== placeholder) {
+	      input.attr('placeholder', placeholder);
+	      _lastPlaceholder = placeholder;
+	    }
+	  }
+
+	  formFields.fieldsArr = function (val) {
+	    if (!arguments.length) return _fieldsArr;
+	    _fieldsArr = val || [];
+	    return formFields;
+	  };
 
-	            var entity = datum && datum.properties && datum.properties.entity;
-	            if (entity) {
-	                datum = entity;
-	            }
+	  formFields.state = function (val) {
+	    if (!arguments.length) return _state;
+	    _state = val;
+	    return formFields;
+	  };
 
-	            if (_fromWayID) {
-	                way = vgraph.entity(_fromWayID);
-	                surface
-	                    .selectAll('.' + _fromWayID)
-	                    .classed('selected', true)
-	                    .classed('related', true);
-	            }
+	  formFields.klass = function (val) {
+	    if (!arguments.length) return _klass;
+	    _klass = val;
+	    return formFields;
+	  };
 
-	            // Hovering a way
-	            if (datum instanceof osmWay && datum.__from) {
-	                way = datum;
-
-	                highlightPathsFrom(_fromWayID ? null : way.id);
-	                surface.selectAll('.' + way.id)
-	                    .classed('related', true);
-
-	                var clickSelect = (!_fromWayID || _fromWayID !== way.id);
-	                help
-	                    .append('div')      // "Click to select FROM {fromName}." / "FROM {fromName}"
-	                    .html(_t('restriction.help.' + (clickSelect ? 'select_from_name' : 'from_name'), {
-	                        from: placeholders.from,
-	                        fromName: displayName(way.id, vgraph)
-	                    }));
-
-
-	            // Hovering a turn arrow
-	            } else if (datum instanceof osmTurn) {
-	                var restrictionType = osmInferRestriction(vgraph, datum, projection);
-	                var turnType = restrictionType.replace(/^(only|no)\_/, '');
-	                var indirect = (datum.direct === false ? _t('restriction.help.indirect') : '');
-	                var klass, turnText, nextText;
-
-	                if (datum.no) {
-	                    klass = 'restrict';
-	                    turnText = _t('restriction.help.turn.no_' + turnType, { indirect: indirect });
-	                    nextText = _t('restriction.help.turn.only_' + turnType, { indirect: '' });
-	                } else if (datum.only) {
-	                    klass = 'only';
-	                    turnText = _t('restriction.help.turn.only_' + turnType, { indirect: indirect });
-	                    nextText = _t('restriction.help.turn.allowed_' + turnType, { indirect: '' });
-	                } else {
-	                    klass = 'allow';
-	                    turnText = _t('restriction.help.turn.allowed_' + turnType, { indirect: indirect });
-	                    nextText = _t('restriction.help.turn.no_' + turnType, { indirect: '' });
-	                }
+	  return formFields;
+	}
 
-	                help
-	                    .append('div')      // "NO Right Turn (indirect)"
-	                    .attr('class', 'qualifier ' + klass)
-	                    .text(turnText);
-
-	                help
-	                    .append('div')      // "FROM {fromName} TO {toName}"
-	                    .html(_t('restriction.help.from_name_to_name', {
-	                        from: placeholders.from,
-	                        fromName: displayName(datum.from.way, vgraph),
-	                        to: placeholders.to,
-	                        toName: displayName(datum.to.way, vgraph)
-	                    }));
-
-	                if (datum.via.ways && datum.via.ways.length) {
-	                    var names = [];
-	                    for (var i = 0; i < datum.via.ways.length; i++) {
-	                        var prev = names[names.length - 1];
-	                        var curr = displayName(datum.via.ways[i], vgraph);
-	                        if (!prev || curr !== prev)   // collapse identical names
-	                            { names.push(curr); }
-	                    }
+	function uiSectionPresetFields(context) {
+	  var section = uiSection('preset-fields', context).label(_t.html('inspector.fields')).disclosureContent(renderDisclosureContent);
+	  var dispatch = dispatch$8('change', 'revert');
+	  var formFields = uiFormFields(context);
 
-	                    help
-	                        .append('div')      // "VIA {viaNames}"
-	                        .html(_t('restriction.help.via_names', {
-	                            via: placeholders.via,
-	                            viaNames: names.join(', ')
-	                        }));
-	                }
+	  var _state;
 
-	                if (!indirect) {
-	                    help
-	                        .append('div')      // Click for "No Right Turn"
-	                        .text(_t('restriction.help.toggle', { turn: nextText.trim() }));
-	                }
+	  var _fieldsArr;
 
-	                highlightPathsFrom(null);
-	                var alongIDs = datum.path.slice();
-	                surface.selectAll(utilEntitySelector(alongIDs))
-	                    .classed('related', true)
-	                    .classed('allow', (klass === 'allow'))
-	                    .classed('restrict', (klass === 'restrict'))
-	                    .classed('only', (klass === 'only'));
+	  var _presets = [];
 
+	  var _tags;
 
-	            // Hovering empty surface
-	            } else {
-	                highlightPathsFrom(null);
-	                if (_fromWayID) {
-	                    help
-	                        .append('div')      // "FROM {fromName}"
-	                        .html(_t('restriction.help.from_name', {
-	                            from: placeholders.from,
-	                            fromName: displayName(_fromWayID, vgraph)
-	                        }));
+	  var _entityIDs;
 
-	                } else {
-	                    help
-	                        .append('div')      // "Click to select a FROM segment."
-	                        .html(_t('restriction.help.select_from', {
-	                            from: placeholders.from
-	                        }));
-	                }
-	            }
+	  function renderDisclosureContent(selection) {
+	    if (!_fieldsArr) {
+	      var graph = context.graph();
+	      var geometries = Object.keys(_entityIDs.reduce(function (geoms, entityID) {
+	        geoms[graph.entity(entityID).geometry(graph)] = true;
+	        return geoms;
+	      }, {}));
+	      var presetsManager = _mainPresetIndex;
+	      var allFields = [];
+	      var allMoreFields = [];
+	      var sharedTotalFields;
+
+	      _presets.forEach(function (preset) {
+	        var fields = preset.fields();
+	        var moreFields = preset.moreFields();
+	        allFields = utilArrayUnion(allFields, fields);
+	        allMoreFields = utilArrayUnion(allMoreFields, moreFields);
+
+	        if (!sharedTotalFields) {
+	          sharedTotalFields = utilArrayUnion(fields, moreFields);
+	        } else {
+	          sharedTotalFields = sharedTotalFields.filter(function (field) {
+	            return fields.indexOf(field) !== -1 || moreFields.indexOf(field) !== -1;
+	          });
 	        }
-	    }
+	      });
 
+	      var sharedFields = allFields.filter(function (field) {
+	        return sharedTotalFields.indexOf(field) !== -1;
+	      });
+	      var sharedMoreFields = allMoreFields.filter(function (field) {
+	        return sharedTotalFields.indexOf(field) !== -1;
+	      });
+	      _fieldsArr = [];
+	      sharedFields.forEach(function (field) {
+	        if (field.matchAllGeometry(geometries)) {
+	          _fieldsArr.push(uiField(context, field, _entityIDs));
+	        }
+	      });
+	      var singularEntity = _entityIDs.length === 1 && graph.hasEntity(_entityIDs[0]);
 
-	    function displayMaxDistance(maxDist) {
-	        var isImperial = !_mainLocalizer.usesMetric();
-	        var opts;
+	      if (singularEntity && singularEntity.isHighwayIntersection(graph) && presetsManager.field('restrictions')) {
+	        _fieldsArr.push(uiField(context, presetsManager.field('restrictions'), _entityIDs));
+	      }
 
-	        if (isImperial) {
-	            var distToFeet = {   // imprecise conversion for prettier display
-	                20: 70, 25: 85, 30: 100, 35: 115, 40: 130, 45: 145, 50: 160
-	            }[maxDist];
-	            opts = { distance: _t('units.feet', { quantity: distToFeet }) };
-	        } else {
-	            opts = { distance: _t('units.meters', { quantity: maxDist }) };
+	      var additionalFields = utilArrayUnion(sharedMoreFields, presetsManager.universal());
+	      additionalFields.sort(function (field1, field2) {
+	        return field1.label().localeCompare(field2.label(), _mainLocalizer.localeCode());
+	      });
+	      additionalFields.forEach(function (field) {
+	        if (sharedFields.indexOf(field) === -1 && field.matchAllGeometry(geometries)) {
+	          _fieldsArr.push(uiField(context, field, _entityIDs, {
+	            show: false
+	          }));
 	        }
+	      });
 
-	        return _t('restriction.controls.distance_up_to', opts);
+	      _fieldsArr.forEach(function (field) {
+	        field.on('change', function (t, onInput) {
+	          dispatch.call('change', field, _entityIDs, t, onInput);
+	        }).on('revert', function (keys) {
+	          dispatch.call('revert', field, keys);
+	        });
+	      });
 	    }
 
+	    _fieldsArr.forEach(function (field) {
+	      field.state(_state).tags(_tags);
+	    });
 
-	    function displayMaxVia(maxVia) {
-	        return maxVia === 0 ? _t('restriction.controls.via_node_only')
-	            : maxVia === 1 ? _t('restriction.controls.via_up_to_one')
-	            : _t('restriction.controls.via_up_to_two');
-	    }
+	    selection.call(formFields.fieldsArr(_fieldsArr).state(_state).klass('grouped-items-area'));
+	    selection.selectAll('.wrap-form-field input').on('keydown', function (d3_event) {
+	      // if user presses enter, and combobox is not active, accept edits..
+	      if (d3_event.keyCode === 13 && // ↩ Return
+	      context.container().select('.combobox').empty()) {
+	        context.enter(modeBrowse(context));
+	      }
+	    });
+	  }
 
+	  section.presets = function (val) {
+	    if (!arguments.length) return _presets;
 
-	    function displayName(entityID, graph) {
-	        var entity = graph.entity(entityID);
-	        var name = utilDisplayName(entity) || '';
-	        var matched = _mainPresetIndex.match(entity, graph);
-	        var type = (matched && matched.name()) || utilDisplayType(entity.id);
-	        return name || type;
+	    if (!_presets || !val || !utilArrayIdentical(_presets, val)) {
+	      _presets = val;
+	      _fieldsArr = null;
 	    }
 
+	    return section;
+	  };
 
-	    restrictions.entityIDs = function(val) {
-	        _intersection = null;
-	        _fromWayID = null;
-	        _oldTurns = null;
-	        _vertexID = val[0];
-	    };
-
-
-	    restrictions.tags = function() {};
-	    restrictions.focus = function() {};
+	  section.state = function (val) {
+	    if (!arguments.length) return _state;
+	    _state = val;
+	    return section;
+	  };
 
+	  section.tags = function (val) {
+	    if (!arguments.length) return _tags;
+	    _tags = val; // Don't reset _fieldsArr here.
 
-	    restrictions.off = function(selection) {
-	        if (!_initialized) { return; }
+	    return section;
+	  };
 
-	        selection.selectAll('.surface')
-	            .call(breathe.off)
-	            .on('click.restrictions', null)
-	            .on('mouseover.restrictions', null);
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
 
-	        select(window)
-	            .on('resize.restrictions', null);
-	    };
+	    if (!val || !_entityIDs || !utilArrayIdentical(_entityIDs, val)) {
+	      _entityIDs = val;
+	      _fieldsArr = null;
+	    }
 
+	    return section;
+	  };
 
-	    return utilRebind(restrictions, dispatch$1, 'on');
+	  return utilRebind(section, dispatch, 'on');
 	}
 
-	uiFieldRestrictions.supportsMultiselection = false;
-
-	function uiFieldTextarea(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var input = select(null);
-	    var _tags;
-
+	function uiSectionRawMemberEditor(context) {
+	  var section = uiSection('raw-member-editor', context).shouldDisplay(function () {
+	    if (!_entityIDs || _entityIDs.length !== 1) return false;
+	    var entity = context.hasEntity(_entityIDs[0]);
+	    return entity && entity.type === 'relation';
+	  }).label(function () {
+	    var entity = context.hasEntity(_entityIDs[0]);
+	    if (!entity) return '';
+	    var gt = entity.members.length > _maxMembers ? '>' : '';
+	    var count = gt + entity.members.slice(0, _maxMembers).length;
+	    return _t('inspector.title_count', {
+	      title: _t.html('inspector.members'),
+	      count: count
+	    });
+	  }).disclosureContent(renderDisclosureContent);
+	  var taginfo = services.taginfo;
 
-	    function textarea(selection) {
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	  var _entityIDs;
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
+	  var _maxMembers = 1000;
 
-	        input = wrap.selectAll('textarea')
-	            .data([0]);
+	  function downloadMember(d3_event, d) {
+	    d3_event.preventDefault(); // display the loading indicator
 
-	        input = input.enter()
-	            .append('textarea')
-	            .attr('id', field.domId)
-	            .call(utilNoAuto)
-	            .on('input', change(true))
-	            .on('blur', change())
-	            .on('change', change())
-	            .merge(input);
-	    }
+	    select(this.parentNode).classed('tag-reference-loading', true);
+	    context.loadEntity(d.id, function () {
+	      section.reRender();
+	    });
+	  }
 
+	  function zoomToMember(d3_event, d) {
+	    d3_event.preventDefault();
+	    var entity = context.entity(d.id);
+	    context.map().zoomToEase(entity); // highlight the feature in case it wasn't previously on-screen
 
-	    function change(onInput) {
-	        return function() {
+	    utilHighlightEntities([d.id], true, context);
+	  }
 
-	            var val = utilGetSetValue(input);
-	            if (!onInput) { val = context.cleanTagValue(val); }
+	  function selectMember(d3_event, d) {
+	    d3_event.preventDefault(); // remove the hover-highlight styling
 
-	            // don't override multiple values with blank string
-	            if (!val && Array.isArray(_tags[field.key])) { return; }
+	    utilHighlightEntities([d.id], false, context);
+	    var entity = context.entity(d.id);
+	    var mapExtent = context.map().extent();
 
-	            var t = {};
-	            t[field.key] = val || undefined;
-	            dispatch$1.call('change', this, t, onInput);
-	        };
+	    if (!entity.intersects(mapExtent, context.graph())) {
+	      // zoom to the entity if its extent is not visible now
+	      context.map().zoomToEase(entity);
 	    }
 
+	    context.enter(modeSelect(context, [d.id]));
+	  }
 
-	    textarea.tags = function(tags) {
-	        _tags = tags;
+	  function changeRole(d3_event, d) {
+	    var oldRole = d.role;
+	    var newRole = context.cleanRelationRole(select(this).property('value'));
 
-	        var isMixed = Array.isArray(tags[field.key]);
+	    if (oldRole !== newRole) {
+	      var member = {
+	        id: d.id,
+	        type: d.type,
+	        role: newRole
+	      };
+	      context.perform(actionChangeMember(d.relation.id, member, d.index), _t('operations.change_role.annotation', {
+	        n: 1
+	      }));
+	      context.validator().validate();
+	    }
+	  }
 
-	        utilGetSetValue(input, !isMixed && tags[field.key] ? tags[field.key] : '')
-	            .attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined)
-	            .attr('placeholder', isMixed ? _t('inspector.multiple_values') : (field.placeholder() || _t('inspector.unknown')))
-	            .classed('mixed', isMixed);
-	    };
+	  function deleteMember(d3_event, d) {
+	    // remove the hover-highlight styling
+	    utilHighlightEntities([d.id], false, context);
+	    context.perform(actionDeleteMember(d.relation.id, d.index), _t('operations.delete_member.annotation', {
+	      n: 1
+	    }));
 
+	    if (!context.hasEntity(d.relation.id)) {
+	      // Removing the last member will also delete the relation.
+	      // If this happens we need to exit the selection mode
+	      context.enter(modeBrowse(context));
+	    } else {
+	      // Changing the mode also runs `validate`, but otherwise we need to
+	      // rerun it manually
+	      context.validator().validate();
+	    }
+	  }
+
+	  function renderDisclosureContent(selection) {
+	    var entityID = _entityIDs[0];
+	    var memberships = [];
+	    var entity = context.entity(entityID);
+	    entity.members.slice(0, _maxMembers).forEach(function (member, index) {
+	      memberships.push({
+	        index: index,
+	        id: member.id,
+	        type: member.type,
+	        role: member.role,
+	        relation: entity,
+	        member: context.hasEntity(member.id),
+	        domId: utilUniqueDomId(entityID + '-member-' + index)
+	      });
+	    });
+	    var list = selection.selectAll('.member-list').data([0]);
+	    list = list.enter().append('ul').attr('class', 'member-list').merge(list);
+	    var items = list.selectAll('li').data(memberships, function (d) {
+	      return osmEntity.key(d.relation) + ',' + d.index + ',' + (d.member ? osmEntity.key(d.member) : 'incomplete');
+	    });
+	    items.exit().each(unbind).remove();
+	    var itemsEnter = items.enter().append('li').attr('class', 'member-row form-field').classed('member-incomplete', function (d) {
+	      return !d.member;
+	    });
+	    itemsEnter.each(function (d) {
+	      var item = select(this);
+	      var label = item.append('label').attr('class', 'field-label').attr('for', d.domId);
+
+	      if (d.member) {
+	        // highlight the member feature in the map while hovering on the list item
+	        item.on('mouseover', function () {
+	          utilHighlightEntities([d.id], true, context);
+	        }).on('mouseout', function () {
+	          utilHighlightEntities([d.id], false, context);
+	        });
+	        var labelLink = label.append('span').attr('class', 'label-text').append('a').attr('href', '#').on('click', selectMember);
+	        labelLink.append('span').attr('class', 'member-entity-type').html(function (d) {
+	          var matched = _mainPresetIndex.match(d.member, context.graph());
+	          return matched && matched.name() || utilDisplayType(d.member.id);
+	        });
+	        labelLink.append('span').attr('class', 'member-entity-name').html(function (d) {
+	          return utilDisplayName(d.member);
+	        });
+	        label.append('button').attr('title', _t('icons.remove')).attr('class', 'remove member-delete').call(svgIcon('#iD-operation-delete'));
+	        label.append('button').attr('class', 'member-zoom').attr('title', _t('icons.zoom_to')).call(svgIcon('#iD-icon-framed-dot', 'monochrome')).on('click', zoomToMember);
+	      } else {
+	        var labelText = label.append('span').attr('class', 'label-text');
+	        labelText.append('span').attr('class', 'member-entity-type').html(_t.html('inspector.' + d.type, {
+	          id: d.id
+	        }));
+	        labelText.append('span').attr('class', 'member-entity-name').html(_t.html('inspector.incomplete', {
+	          id: d.id
+	        }));
+	        label.append('button').attr('class', 'member-download').attr('title', _t('icons.download')).call(svgIcon('#iD-icon-load')).on('click', downloadMember);
+	      }
+	    });
+	    var wrapEnter = itemsEnter.append('div').attr('class', 'form-field-input-wrap form-field-input-member');
+	    wrapEnter.append('input').attr('class', 'member-role').attr('id', function (d) {
+	      return d.domId;
+	    }).property('type', 'text').attr('placeholder', _t('inspector.role')).call(utilNoAuto);
+
+	    if (taginfo) {
+	      wrapEnter.each(bindTypeahead);
+	    } // update
+
+
+	    items = items.merge(itemsEnter).order();
+	    items.select('input.member-role').property('value', function (d) {
+	      return d.role;
+	    }).on('blur', changeRole).on('change', changeRole);
+	    items.select('button.member-delete').on('click', deleteMember);
+	    var dragOrigin, targetIndex;
+	    items.call(d3_drag().on('start', function (d3_event) {
+	      dragOrigin = {
+	        x: d3_event.x,
+	        y: d3_event.y
+	      };
+	      targetIndex = null;
+	    }).on('drag', function (d3_event) {
+	      var x = d3_event.x - dragOrigin.x,
+	          y = d3_event.y - dragOrigin.y;
+	      if (!select(this).classed('dragging') && // don't display drag until dragging beyond a distance threshold
+	      Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= 5) return;
+	      var index = items.nodes().indexOf(this);
+	      select(this).classed('dragging', true);
+	      targetIndex = null;
+	      selection.selectAll('li.member-row').style('transform', function (d2, index2) {
+	        var node = select(this).node();
+
+	        if (index === index2) {
+	          return 'translate(' + x + 'px, ' + y + 'px)';
+	        } else if (index2 > index && d3_event.y > node.offsetTop) {
+	          if (targetIndex === null || index2 > targetIndex) {
+	            targetIndex = index2;
+	          }
 
-	    textarea.focus = function() {
-	        input.node().focus();
-	    };
+	          return 'translateY(-100%)';
+	        } else if (index2 < index && d3_event.y < node.offsetTop + node.offsetHeight) {
+	          if (targetIndex === null || index2 < targetIndex) {
+	            targetIndex = index2;
+	          }
 
+	          return 'translateY(100%)';
+	        }
 
-	    return utilRebind(textarea, dispatch$1, 'on');
-	}
+	        return null;
+	      });
+	    }).on('end', function (d3_event, d) {
+	      if (!select(this).classed('dragging')) return;
+	      var index = items.nodes().indexOf(this);
+	      select(this).classed('dragging', false);
+	      selection.selectAll('li.member-row').style('transform', null);
+
+	      if (targetIndex !== null) {
+	        // dragged to a new position, reorder
+	        context.perform(actionMoveMember(d.relation.id, index, targetIndex), _t('operations.reorder_members.annotation'));
+	        context.validator().validate();
+	      }
+	    }));
 
-	function uiFieldWikidata(field, context) {
-	    var wikidata = services.wikidata;
-	    var dispatch$1 = dispatch('change');
-
-	    var _selection = select(null);
-	    var _searchInput = select(null);
-	    var _qid = null;
-	    var _wikidataEntity = null;
-	    var _wikiURL = '';
-	    var _entityIDs = [];
-
-	    var _wikipediaKey = field.keys && field.keys.find(function(key) {
-	            return key.includes('wikipedia');
-	        }),
-	        _hintKey = field.key === 'wikidata' ? 'name' : field.key.split(':')[0];
+	    function bindTypeahead(d) {
+	      var row = select(this);
+	      var role = row.selectAll('input.member-role');
+	      var origValue = role.property('value');
 
-	    var combobox = uiCombobox(context, 'combo-' + field.safeid)
-	        .caseSensitive(true)
-	        .minItems(1);
+	      function sort(value, data) {
+	        var sameletter = [];
+	        var other = [];
 
-	    function wiki(selection) {
+	        for (var i = 0; i < data.length; i++) {
+	          if (data[i].value.substring(0, value.length) === value) {
+	            sameletter.push(data[i]);
+	          } else {
+	            other.push(data[i]);
+	          }
+	        }
 
-	        _selection = selection;
+	        return sameletter.concat(other);
+	      }
 
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	      role.call(uiCombobox(context, 'member-role').fetcher(function (role, callback) {
+	        // The `geometry` param is used in the `taginfo.js` interface for
+	        // filtering results, as a key into the `tag_members_fractions`
+	        // object.  If we don't know the geometry because the member is
+	        // not yet downloaded, it's ok to guess based on type.
+	        var geometry;
+
+	        if (d.member) {
+	          geometry = context.graph().geometry(d.member.id);
+	        } else if (d.type === 'relation') {
+	          geometry = 'relation';
+	        } else if (d.type === 'way') {
+	          geometry = 'line';
+	        } else {
+	          geometry = 'point';
+	        }
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
-
-
-	        var list = wrap.selectAll('ul')
-	            .data([0]);
-
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'rows')
-	            .merge(list);
-
-	        var searchRow = list.selectAll('li.wikidata-search')
-	            .data([0]);
-
-	        var searchRowEnter = searchRow.enter()
-	            .append('li')
-	            .attr('class', 'wikidata-search');
-
-	        searchRowEnter
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('id', field.domId)
-	            .style('flex', '1')
-	            .call(utilNoAuto)
-	            .on('focus', function() {
-	                var node = select(this).node();
-	                node.setSelectionRange(0, node.value.length);
-	            })
-	            .on('blur', function() {
-	                setLabelForEntity();
-	            })
-	            .call(combobox.fetcher(fetchWikidataItems));
-
-	        combobox.on('accept', function(d) {
-	            _qid = d.id;
-	            change();
-	        }).on('cancel', function() {
-	            setLabelForEntity();
+	        var rtype = entity.tags.type;
+	        taginfo.roles({
+	          debounce: true,
+	          rtype: rtype || '',
+	          geometry: geometry,
+	          query: role
+	        }, function (err, data) {
+	          if (!err) callback(sort(role, data));
 	        });
-
-	        searchRowEnter
-	            .append('button')
-	            .attr('class', 'form-field-button wiki-link')
-	            .attr('title', _t('icons.view_on', { domain: 'wikidata.org' }))
-	            .attr('tabindex', -1)
-	            .call(svgIcon('#iD-icon-out-link'))
-	            .on('click', function() {
-	                event.preventDefault();
-	                if (_wikiURL) { window.open(_wikiURL, '_blank'); }
-	            });
-
-	        searchRow = searchRow.merge(searchRowEnter);
-
-	        _searchInput = searchRow.select('input');
-
-	        var wikidataProperties = ['description', 'identifier'];
-
-	        var items = list.selectAll('li.labeled-input')
-	            .data(wikidataProperties);
-
-	        // Enter
-	        var enter = items.enter()
-	            .append('li')
-	            .attr('class', function(d) { return 'labeled-input preset-wikidata-' + d; });
-
-	        enter
-	            .append('span')
-	            .attr('class', 'label')
-	            .text(function(d) { return _t('wikidata.' + d); });
-
-	        enter
-	            .append('input')
-	            .attr('type', 'text')
-	            .call(utilNoAuto)
-	            .classed('disabled', 'true')
-	            .attr('readonly', 'true');
-
-	        enter
-	            .append('button')
-	            .attr('class', 'form-field-button')
-	            .attr('title', _t('icons.copy'))
-	            .attr('tabindex', -1)
-	            .call(svgIcon('#iD-operation-copy'))
-	            .on('click', function() {
-	                event.preventDefault();
-	                select(this.parentNode)
-	                    .select('input')
-	                    .node()
-	                    .select();
-	                document.execCommand('copy');
-	            });
-
+	      }).on('cancel', function () {
+	        role.property('value', origValue);
+	      }));
 	    }
 
-	    function fetchWikidataItems(q, callback) {
+	    function unbind() {
+	      var row = select(this);
+	      row.selectAll('input.member-role').call(uiCombobox.off, context);
+	    }
+	  }
 
-	        if (!q && _hintKey) {
-	            // other tags may be good search terms
-	            for (var i in _entityIDs) {
-	                var entity = context.hasEntity(_entityIDs[i]);
-	                if (entity.tags[_hintKey]) {
-	                    q = entity.tags[_hintKey];
-	                    break;
-	                }
-	            }
-	        }
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return section;
+	  };
 
-	        wikidata.itemsForSearchQuery(q, function(err, data) {
-	            if (err) { return; }
+	  return section;
+	}
 
-	            for (var i in data) {
-	                data[i].value = data[i].label + ' (' +  data[i].id + ')';
-	                data[i].title = data[i].description;
-	            }
+	function actionDeleteMembers(relationId, memberIndexes) {
+	  return function (graph) {
+	    // Remove the members in descending order so removals won't shift what members
+	    // are at the remaining indexes
+	    memberIndexes.sort(function (a, b) {
+	      return b - a;
+	    });
 
-	            if (callback) { callback(data); }
-	        });
+	    for (var i in memberIndexes) {
+	      graph = actionDeleteMember(relationId, memberIndexes[i])(graph);
 	    }
 
+	    return graph;
+	  };
+	}
 
-	    function change() {
-	        var syncTags = {};
-	        syncTags[field.key] = _qid;
-	        dispatch$1.call('change', this, syncTags);
+	function uiSectionRawMembershipEditor(context) {
+	  var section = uiSection('raw-membership-editor', context).shouldDisplay(function () {
+	    return _entityIDs && _entityIDs.length;
+	  }).label(function () {
+	    var parents = getSharedParentRelations();
+	    var gt = parents.length > _maxMemberships ? '>' : '';
+	    var count = gt + parents.slice(0, _maxMemberships).length;
+	    return _t('inspector.title_count', {
+	      title: _t.html('inspector.relations'),
+	      count: count
+	    });
+	  }).disclosureContent(renderDisclosureContent);
+	  var taginfo = services.taginfo;
+	  var nearbyCombo = uiCombobox(context, 'parent-relation').minItems(1).fetcher(fetchNearbyRelations).itemsMouseEnter(function (d3_event, d) {
+	    if (d.relation) utilHighlightEntities([d.relation.id], true, context);
+	  }).itemsMouseLeave(function (d3_event, d) {
+	    if (d.relation) utilHighlightEntities([d.relation.id], false, context);
+	  });
+	  var _inChange = false;
+	  var _entityIDs = [];
 
-	        // attempt asynchronous update of wikidata tag..
-	        var initGraph = context.graph();
-	        var initEntityIDs = _entityIDs;
+	  var _showBlank;
 
-	        wikidata.entityByQID(_qid, function(err, entity) {
-	            if (err) { return; }
+	  var _maxMemberships = 1000;
 
-	            // If graph has changed, we can't apply this update.
-	            if (context.graph() !== initGraph) { return; }
+	  function getSharedParentRelations() {
+	    var parents = [];
 
-	            if (!entity.sitelinks) { return; }
+	    for (var i = 0; i < _entityIDs.length; i++) {
+	      var entity = context.graph().hasEntity(_entityIDs[i]);
+	      if (!entity) continue;
 
-	            var langs = wikidata.languagesToQuery();
-	            // use the label and description languages as fallbacks
-	            ['labels', 'descriptions'].forEach(function(key) {
-	                if (!entity[key]) { return; }
+	      if (i === 0) {
+	        parents = context.graph().parentRelations(entity);
+	      } else {
+	        parents = utilArrayIntersection(parents, context.graph().parentRelations(entity));
+	      }
 
-	                var valueLangs = Object.keys(entity[key]);
-	                if (valueLangs.length === 0) { return; }
-	                var valueLang = valueLangs[0];
+	      if (!parents.length) break;
+	    }
 
-	                if (langs.indexOf(valueLang) === -1) {
-	                    langs.push(valueLang);
-	                }
-	            });
+	    return parents;
+	  }
 
-	            var newWikipediaValue;
-
-	            if (_wikipediaKey) {
-	                var foundPreferred;
-	                for (var i in langs) {
-	                    var lang = langs[i];
-	                    var siteID = lang.replace('-', '_') + 'wiki';
-	                    if (entity.sitelinks[siteID]) {
-	                        foundPreferred = true;
-	                        newWikipediaValue = lang + ':' + entity.sitelinks[siteID].title;
-	                        // use the first match
-	                        break;
-	                    }
-	                }
+	  function getMemberships() {
+	    var memberships = [];
+	    var relations = getSharedParentRelations().slice(0, _maxMemberships);
+	    var isMultiselect = _entityIDs.length > 1;
+	    var i, relation, membership, index, member, indexedMember;
 
-	                if (!foundPreferred) {
-	                    // No wikipedia sites available in the user's language or the fallback languages,
-	                    // default to any wikipedia sitelink
+	    for (i = 0; i < relations.length; i++) {
+	      relation = relations[i];
+	      membership = {
+	        relation: relation,
+	        members: [],
+	        hash: osmEntity.key(relation)
+	      };
 
-	                    var wikiSiteKeys = Object.keys(entity.sitelinks).filter(function(site) {
-	                        return site.endsWith('wiki');
-	                    });
+	      for (index = 0; index < relation.members.length; index++) {
+	        member = relation.members[index];
 
-	                    if (wikiSiteKeys.length === 0) {
-	                        // if no wikipedia pages are linked to this wikidata entity, delete that tag
-	                        newWikipediaValue = null;
-	                    } else {
-	                        var wikiLang = wikiSiteKeys[0].slice(0, -4).replace('_', '-');
-	                        var wikiTitle = entity.sitelinks[wikiSiteKeys[0]].title;
-	                        newWikipediaValue = wikiLang + ':' + wikiTitle;
-	                    }
-	                }
-	            }
+	        if (_entityIDs.indexOf(member.id) !== -1) {
+	          indexedMember = Object.assign({}, member, {
+	            index: index
+	          });
+	          membership.members.push(indexedMember);
+	          membership.hash += ',' + index.toString();
+
+	          if (!isMultiselect) {
+	            // For single selections, list one entry per membership per relation.
+	            // For multiselections, list one entry per relation.
+	            memberships.push(membership);
+	            membership = {
+	              relation: relation,
+	              members: [],
+	              hash: osmEntity.key(relation)
+	            };
+	          }
+	        }
+	      }
 
-	            if (newWikipediaValue) {
-	                newWikipediaValue = context.cleanTagValue(newWikipediaValue);
-	            }
+	      if (membership.members.length) memberships.push(membership);
+	    }
 
-	            if (typeof newWikipediaValue === 'undefined') { return; }
+	    memberships.forEach(function (membership) {
+	      membership.domId = utilUniqueDomId('membership-' + membership.relation.id);
+	      var roles = [];
+	      membership.members.forEach(function (member) {
+	        if (roles.indexOf(member.role) === -1) roles.push(member.role);
+	      });
+	      membership.role = roles.length === 1 ? roles[0] : roles;
+	    });
+	    return memberships;
+	  }
 
-	            var actions = initEntityIDs.map(function(entityID) {
-	                var entity = context.hasEntity(entityID);
-	                if (!entity) { return; }
+	  function selectRelation(d3_event, d) {
+	    d3_event.preventDefault(); // remove the hover-highlight styling
 
-	                var currTags = Object.assign({}, entity.tags);  // shallow copy
-	                if (newWikipediaValue === null) {
-	                    if (!currTags[_wikipediaKey]) { return; }
+	    utilHighlightEntities([d.relation.id], false, context);
+	    context.enter(modeSelect(context, [d.relation.id]));
+	  }
 
-	                    delete currTags[_wikipediaKey];
-	                } else {
-	                    currTags[_wikipediaKey] = newWikipediaValue;
-	                }
+	  function zoomToRelation(d3_event, d) {
+	    d3_event.preventDefault();
+	    var entity = context.entity(d.relation.id);
+	    context.map().zoomToEase(entity); // highlight the relation in case it wasn't previously on-screen
 
-	                return actionChangeTags(entityID, currTags);
-	            }).filter(Boolean);
+	    utilHighlightEntities([d.relation.id], true, context);
+	  }
 
-	            if (!actions.length) { return; }
+	  function changeRole(d3_event, d) {
+	    if (d === 0) return; // called on newrow (shouldn't happen)
 
-	            // Coalesce the update of wikidata tag into the previous tag change
-	            context.overwrite(
-	                function actionUpdateWikipediaTags(graph) {
-	                    actions.forEach(function(action) {
-	                        graph = action(graph);
-	                    });
-	                    return graph;
-	                },
-	                context.history().undoAnnotation()
-	            );
+	    if (_inChange) return; // avoid accidental recursive call #5731
+
+	    var newRole = context.cleanRelationRole(select(this).property('value'));
+	    if (!newRole.trim() && typeof d.role !== 'string') return;
+	    var membersToUpdate = d.members.filter(function (member) {
+	      return member.role !== newRole;
+	    });
 
-	            // do not dispatch.call('change') here, because entity_editor
-	            // changeTags() is not intended to be called asynchronously
+	    if (membersToUpdate.length) {
+	      _inChange = true;
+	      context.perform(function actionChangeMemberRoles(graph) {
+	        membersToUpdate.forEach(function (member) {
+	          var newMember = Object.assign({}, member, {
+	            role: newRole
+	          });
+	          delete newMember.index;
+	          graph = actionChangeMember(d.relation.id, newMember, member.index)(graph);
 	        });
+	        return graph;
+	      }, _t('operations.change_role.annotation', {
+	        n: membersToUpdate.length
+	      }));
+	      context.validator().validate();
 	    }
 
-	    function setLabelForEntity() {
-	        var label = '';
-	        if (_wikidataEntity) {
-	            label = entityPropertyForDisplay(_wikidataEntity, 'labels');
-	            if (label.length === 0) {
-	                label = _wikidataEntity.id.toString();
-	            }
-	        }
-	        utilGetSetValue(_searchInput, label);
-	    }
+	    _inChange = false;
+	  }
 
+	  function addMembership(d, role) {
+	    this.blur(); // avoid keeping focus on the button
 
-	    wiki.tags = function(tags) {
+	    _showBlank = false;
 
-	        var isMixed = Array.isArray(tags[field.key]);
-	        _searchInput
-	            .attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : null)
-	            .attr('placeholder', isMixed ? _t('inspector.multiple_values') : '')
-	            .classed('mixed', isMixed);
+	    function actionAddMembers(relationId, ids, role) {
+	      return function (graph) {
+	        for (var i in ids) {
+	          var member = {
+	            id: ids[i],
+	            type: graph.entity(ids[i]).type,
+	            role: role
+	          };
+	          graph = actionAddMember(relationId, member)(graph);
+	        }
 
-	        _qid = typeof tags[field.key] === 'string' && tags[field.key] || '';
+	        return graph;
+	      };
+	    }
 
-	        if (!/^Q[0-9]*$/.test(_qid)) {   // not a proper QID
-	            unrecognized();
-	            return;
-	        }
+	    if (d.relation) {
+	      context.perform(actionAddMembers(d.relation.id, _entityIDs, role), _t('operations.add_member.annotation', {
+	        n: _entityIDs.length
+	      }));
+	      context.validator().validate();
+	    } else {
+	      var relation = osmRelation();
+	      context.perform(actionAddEntity(relation), actionAddMembers(relation.id, _entityIDs, role), _t('operations.add.annotation.relation')); // changing the mode also runs `validate`
 
-	        // QID value in correct format
-	        _wikiURL = 'https://wikidata.org/wiki/' + _qid;
-	        wikidata.entityByQID(_qid, function(err, entity) {
-	            if (err) {
-	                unrecognized();
-	                return;
-	            }
-	            _wikidataEntity = entity;
+	      context.enter(modeSelect(context, [relation.id]).newFeature(true));
+	    }
+	  }
 
-	            setLabelForEntity();
+	  function deleteMembership(d3_event, d) {
+	    this.blur(); // avoid keeping focus on the button
 
-	            var description = entityPropertyForDisplay(entity, 'descriptions');
+	    if (d === 0) return; // called on newrow (shouldn't happen)
+	    // remove the hover-highlight styling
 
-	            _selection.select('button.wiki-link')
-	                .classed('disabled', false);
+	    utilHighlightEntities([d.relation.id], false, context);
+	    var indexes = d.members.map(function (member) {
+	      return member.index;
+	    });
+	    context.perform(actionDeleteMembers(d.relation.id, indexes), _t('operations.delete_member.annotation', {
+	      n: _entityIDs.length
+	    }));
+	    context.validator().validate();
+	  }
 
-	            _selection.select('.preset-wikidata-description')
-	                .style('display', function(){
-	                    return description.length > 0 ? 'flex' : 'none';
-	                })
-	                .select('input')
-	                .attr('value', description);
+	  function fetchNearbyRelations(q, callback) {
+	    var newRelation = {
+	      relation: null,
+	      value: _t('inspector.new_relation'),
+	      display: _t.html('inspector.new_relation')
+	    };
+	    var entityID = _entityIDs[0];
+	    var result = [];
+	    var graph = context.graph();
 
-	            _selection.select('.preset-wikidata-identifier')
-	                .style('display', function(){
-	                    return entity.id ? 'flex' : 'none';
-	                })
-	                .select('input')
-	                .attr('value', entity.id);
+	    function baseDisplayLabel(entity) {
+	      var matched = _mainPresetIndex.match(entity, graph);
+	      var presetName = matched && matched.name() || _t('inspector.relation');
+	      var entityName = utilDisplayName(entity) || '';
+	      return presetName + ' ' + entityName;
+	    }
+
+	    var explicitRelation = q && context.hasEntity(q.toLowerCase());
+
+	    if (explicitRelation && explicitRelation.type === 'relation' && explicitRelation.id !== entityID) {
+	      // loaded relation is specified explicitly, only show that
+	      result.push({
+	        relation: explicitRelation,
+	        value: baseDisplayLabel(explicitRelation) + ' ' + explicitRelation.id
+	      });
+	    } else {
+	      context.history().intersects(context.map().extent()).forEach(function (entity) {
+	        if (entity.type !== 'relation' || entity.id === entityID) return;
+	        var value = baseDisplayLabel(entity);
+	        if (q && (value + ' ' + entity.id).toLowerCase().indexOf(q.toLowerCase()) === -1) return;
+	        result.push({
+	          relation: entity,
+	          value: value
 	        });
+	      });
+	      result.sort(function (a, b) {
+	        return osmRelation.creationOrder(a.relation, b.relation);
+	      }); // Dedupe identical names by appending relation id - see #2891
 
+	      var dupeGroups = Object.values(utilArrayGroupBy(result, 'value')).filter(function (v) {
+	        return v.length > 1;
+	      });
+	      dupeGroups.forEach(function (group) {
+	        group.forEach(function (obj) {
+	          obj.value += ' ' + obj.relation.id;
+	        });
+	      });
+	    }
 
-	        // not a proper QID
-	        function unrecognized() {
-	            _wikidataEntity = null;
-	            setLabelForEntity();
+	    result.forEach(function (obj) {
+	      obj.title = obj.value;
+	    });
+	    result.unshift(newRelation);
+	    callback(result);
+	  }
 
-	            _selection.select('.preset-wikidata-description')
-	                .style('display', 'none');
-	            _selection.select('.preset-wikidata-identifier')
-	                .style('display', 'none');
+	  function renderDisclosureContent(selection) {
+	    var memberships = getMemberships();
+	    var list = selection.selectAll('.member-list').data([0]);
+	    list = list.enter().append('ul').attr('class', 'member-list').merge(list);
+	    var items = list.selectAll('li.member-row-normal').data(memberships, function (d) {
+	      return d.hash;
+	    });
+	    items.exit().each(unbind).remove(); // Enter
 
-	            _selection.select('button.wiki-link')
-	                .classed('disabled', true);
+	    var itemsEnter = items.enter().append('li').attr('class', 'member-row member-row-normal form-field'); // highlight the relation in the map while hovering on the list item
 
-	            if (_qid && _qid !== '') {
-	                _wikiURL = 'https://wikidata.org/wiki/Special:Search?search=' + _qid;
-	            } else {
-	                _wikiURL = '';
-	            }
-	        }
-	    };
+	    itemsEnter.on('mouseover', function (d3_event, d) {
+	      utilHighlightEntities([d.relation.id], true, context);
+	    }).on('mouseout', function (d3_event, d) {
+	      utilHighlightEntities([d.relation.id], false, context);
+	    });
+	    var labelEnter = itemsEnter.append('label').attr('class', 'field-label').attr('for', function (d) {
+	      return d.domId;
+	    });
+	    var labelLink = labelEnter.append('span').attr('class', 'label-text').append('a').attr('href', '#').on('click', selectRelation);
+	    labelLink.append('span').attr('class', 'member-entity-type').html(function (d) {
+	      var matched = _mainPresetIndex.match(d.relation, context.graph());
+	      return matched && matched.name() || _t('inspector.relation');
+	    });
+	    labelLink.append('span').attr('class', 'member-entity-name').html(function (d) {
+	      return utilDisplayName(d.relation);
+	    });
+	    labelEnter.append('button').attr('class', 'remove member-delete').call(svgIcon('#iD-operation-delete')).on('click', deleteMembership);
+	    labelEnter.append('button').attr('class', 'member-zoom').attr('title', _t('icons.zoom_to')).call(svgIcon('#iD-icon-framed-dot', 'monochrome')).on('click', zoomToRelation);
+	    var wrapEnter = itemsEnter.append('div').attr('class', 'form-field-input-wrap form-field-input-member');
+	    wrapEnter.append('input').attr('class', 'member-role').attr('id', function (d) {
+	      return d.domId;
+	    }).property('type', 'text').property('value', function (d) {
+	      return typeof d.role === 'string' ? d.role : '';
+	    }).attr('title', function (d) {
+	      return Array.isArray(d.role) ? d.role.filter(Boolean).join('\n') : d.role;
+	    }).attr('placeholder', function (d) {
+	      return Array.isArray(d.role) ? _t('inspector.multiple_roles') : _t('inspector.role');
+	    }).classed('mixed', function (d) {
+	      return Array.isArray(d.role);
+	    }).call(utilNoAuto).on('blur', changeRole).on('change', changeRole);
+
+	    if (taginfo) {
+	      wrapEnter.each(bindTypeahead);
+	    }
+
+	    var newMembership = list.selectAll('.member-row-new').data(_showBlank ? [0] : []); // Exit
+
+	    newMembership.exit().remove(); // Enter
+
+	    var newMembershipEnter = newMembership.enter().append('li').attr('class', 'member-row member-row-new form-field');
+	    var newLabelEnter = newMembershipEnter.append('label').attr('class', 'field-label');
+	    newLabelEnter.append('input').attr('placeholder', _t('inspector.choose_relation')).attr('type', 'text').attr('class', 'member-entity-input').call(utilNoAuto);
+	    newLabelEnter.append('button').attr('class', 'remove member-delete').call(svgIcon('#iD-operation-delete')).on('click', function () {
+	      list.selectAll('.member-row-new').remove();
+	    });
+	    var newWrapEnter = newMembershipEnter.append('div').attr('class', 'form-field-input-wrap form-field-input-member');
+	    newWrapEnter.append('input').attr('class', 'member-role').property('type', 'text').attr('placeholder', _t('inspector.role')).call(utilNoAuto); // Update
 
-	    function entityPropertyForDisplay(wikidataEntity, propKey) {
-	        if (!wikidataEntity[propKey]) { return ''; }
-	        var propObj = wikidataEntity[propKey];
-	        var langKeys = Object.keys(propObj);
-	        if (langKeys.length === 0) { return ''; }
-	        // sorted by priority, since we want to show the user's language first if possible
-	        var langs = wikidata.languagesToQuery();
-	        for (var i in langs) {
-	            var lang = langs[i];
-	            var valueObj = propObj[lang];
-	            if (valueObj && valueObj.value && valueObj.value.length > 0) { return valueObj.value; }
-	        }
-	        // default to any available value
-	        return propObj[langKeys[0]].value;
-	    }
+	    newMembership = newMembership.merge(newMembershipEnter);
+	    newMembership.selectAll('.member-entity-input').on('blur', cancelEntity) // if it wasn't accepted normally, cancel it
+	    .call(nearbyCombo.on('accept', acceptEntity).on('cancel', cancelEntity)); // Container for the Add button
 
+	    var addRow = selection.selectAll('.add-row').data([0]); // enter
 
-	    wiki.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return wiki;
-	    };
+	    var addRowEnter = addRow.enter().append('div').attr('class', 'add-row');
+	    var addRelationButton = addRowEnter.append('button').attr('class', 'add-relation');
+	    addRelationButton.call(svgIcon('#iD-icon-plus', 'light'));
+	    addRelationButton.call(uiTooltip().title(_t.html('inspector.add_to_relation')).placement(_mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left'));
+	    addRowEnter.append('div').attr('class', 'space-value'); // preserve space
 
+	    addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
+	    // update
 
-	    wiki.focus = function() {
-	        _searchInput.node().focus();
-	    };
+	    addRow = addRow.merge(addRowEnter);
+	    addRow.select('.add-relation').on('click', function () {
+	      _showBlank = true;
+	      section.reRender();
+	      list.selectAll('.member-entity-input').node().focus();
+	    });
 
+	    function acceptEntity(d) {
+	      if (!d) {
+	        cancelEntity();
+	        return;
+	      } // remove hover-higlighting
 
-	    return utilRebind(wiki, dispatch$1, 'on');
-	}
 
-	function uiFieldWikipedia(field, context) {
-	  var arguments$1 = arguments;
+	      if (d.relation) utilHighlightEntities([d.relation.id], false, context);
+	      var role = context.cleanRelationRole(list.selectAll('.member-row-new .member-role').property('value'));
+	      addMembership(d, role);
+	    }
 
-	  var dispatch$1 = dispatch('change');
-	  var wikipedia = services.wikipedia;
-	  var wikidata = services.wikidata;
-	  var _langInput = select(null);
-	  var _titleInput = select(null);
-	  var _wikiURL = '';
-	  var _entityIDs;
-	  var _tags;
+	    function cancelEntity() {
+	      var input = newMembership.selectAll('.member-entity-input');
+	      input.property('value', ''); // remove hover-higlighting
 
-	  var _dataWikipedia = [];
-	  _mainFileFetcher.get('wmf_sitematrix')
-	    .then(function (d) {
-	      _dataWikipedia = d;
-	      if (_tags) { updateForTags(_tags); }
-	    })
-	    .catch(function () { /* ignore */ });
+	      context.surface().selectAll('.highlighted').classed('highlighted', false);
+	    }
 
+	    function bindTypeahead(d) {
+	      var row = select(this);
+	      var role = row.selectAll('input.member-role');
+	      var origValue = role.property('value');
 
-	  var langCombo = uiCombobox(context, 'wikipedia-lang')
-	    .fetcher(function (value, callback) {
-	      var v = value.toLowerCase();
-	      callback(_dataWikipedia
-	        .filter(function (d) {
-	          return d[0].toLowerCase().indexOf(v) >= 0 ||
-	            d[1].toLowerCase().indexOf(v) >= 0 ||
-	            d[2].toLowerCase().indexOf(v) >= 0;
-	        })
-	        .map(function (d) { return ({ value: d[1] }); })
-	      );
-	    });
+	      function sort(value, data) {
+	        var sameletter = [];
+	        var other = [];
 
-	  var titleCombo = uiCombobox(context, 'wikipedia-title')
-	    .fetcher(function (value, callback) {
-	      if (!value) {
-	        value = '';
-	        for (var i in _entityIDs) {
-	          var entity = context.hasEntity(_entityIDs[i]);
-	          if (entity.tags.name) {
-	            value = entity.tags.name;
-	            break;
+	        for (var i = 0; i < data.length; i++) {
+	          if (data[i].value.substring(0, value.length) === value) {
+	            sameletter.push(data[i]);
+	          } else {
+	            other.push(data[i]);
 	          }
 	        }
-	      }
-	      var searchfn = value.length > 7 ? wikipedia.search : wikipedia.suggestions;
-	      searchfn(language()[2], value, function (query, data) {
-	        callback( data.map(function (d) { return ({ value: d }); }) );
-	      });
-	    });
-
 
-	  function wiki(selection) {
-	    var wrap = selection.selectAll('.form-field-input-wrap')
-	      .data([0]);
+	        return sameletter.concat(other);
+	      }
 
-	    wrap = wrap.enter()
-	      .append('div')
-	      .attr('class', ("form-field-input-wrap form-field-input-" + (field.type)))
-	      .merge(wrap);
+	      role.call(uiCombobox(context, 'member-role').fetcher(function (role, callback) {
+	        var rtype = d.relation.tags.type;
+	        taginfo.roles({
+	          debounce: true,
+	          rtype: rtype || '',
+	          geometry: context.graph().geometry(_entityIDs[0]),
+	          query: role
+	        }, function (err, data) {
+	          if (!err) callback(sort(role, data));
+	        });
+	      }).on('cancel', function () {
+	        role.property('value', origValue);
+	      }));
+	    }
 
+	    function unbind() {
+	      var row = select(this);
+	      row.selectAll('input.member-role').call(uiCombobox.off, context);
+	    }
+	  }
 
-	    var langContainer = wrap.selectAll('.wiki-lang-container')
-	      .data([0]);
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    _showBlank = false;
+	    return section;
+	  };
 
-	    langContainer = langContainer.enter()
-	      .append('div')
-	      .attr('class', 'wiki-lang-container')
-	      .merge(langContainer);
+	  return section;
+	}
 
+	function uiSectionSelectionList(context) {
+	  var _selectedIDs = [];
+	  var section = uiSection('selected-features', context).shouldDisplay(function () {
+	    return _selectedIDs.length > 1;
+	  }).label(function () {
+	    return _t('inspector.title_count', {
+	      title: _t.html('inspector.features'),
+	      count: _selectedIDs.length
+	    });
+	  }).disclosureContent(renderDisclosureContent);
+	  context.history().on('change.selectionList', function (difference) {
+	    if (difference) {
+	      section.reRender();
+	    }
+	  });
 
-	    _langInput = langContainer.selectAll('input.wiki-lang')
-	      .data([0]);
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _selectedIDs;
+	    _selectedIDs = val;
+	    return section;
+	  };
 
-	    _langInput = _langInput.enter()
-	      .append('input')
-	      .attr('type', 'text')
-	      .attr('class', 'wiki-lang')
-	      .attr('placeholder', _t('translate.localized_translation_language'))
-	      .call(utilNoAuto)
-	      .call(langCombo)
-	      .merge(_langInput);
+	  function selectEntity(d3_event, entity) {
+	    context.enter(modeSelect(context, [entity.id]));
+	  }
 
-	    _langInput
-	      .on('blur', changeLang)
-	      .on('change', changeLang);
+	  function deselectEntity(d3_event, entity) {
+	    var selectedIDs = _selectedIDs.slice();
 
+	    var index = selectedIDs.indexOf(entity.id);
 
-	    var titleContainer = wrap.selectAll('.wiki-title-container')
-	      .data([0]);
+	    if (index > -1) {
+	      selectedIDs.splice(index, 1);
+	      context.enter(modeSelect(context, selectedIDs));
+	    }
+	  }
 
-	    titleContainer = titleContainer.enter()
-	      .append('div')
-	      .attr('class', 'wiki-title-container')
-	      .merge(titleContainer);
+	  function renderDisclosureContent(selection) {
+	    var list = selection.selectAll('.feature-list').data([0]);
+	    list = list.enter().append('ul').attr('class', 'feature-list').merge(list);
 
-	    _titleInput = titleContainer.selectAll('input.wiki-title')
-	      .data([0]);
+	    var entities = _selectedIDs.map(function (id) {
+	      return context.hasEntity(id);
+	    }).filter(Boolean);
 
-	    _titleInput = _titleInput.enter()
-	      .append('input')
-	      .attr('type', 'text')
-	      .attr('class', 'wiki-title')
-	      .attr('id', field.domId)
-	      .call(utilNoAuto)
-	      .call(titleCombo)
-	      .merge(_titleInput);
+	    var items = list.selectAll('.feature-list-item').data(entities, osmEntity.key);
+	    items.exit().remove(); // Enter
 
-	    _titleInput
-	      .on('blur', blur)
-	      .on('change', change);
+	    var enter = items.enter().append('li').attr('class', 'feature-list-item').each(function (d) {
+	      select(this).on('mouseover', function () {
+	        utilHighlightEntities([d.id], true, context);
+	      }).on('mouseout', function () {
+	        utilHighlightEntities([d.id], false, context);
+	      });
+	    });
+	    var label = enter.append('button').attr('class', 'label').on('click', selectEntity);
+	    label.append('span').attr('class', 'entity-geom-icon').call(svgIcon('', 'pre-text'));
+	    label.append('span').attr('class', 'entity-type');
+	    label.append('span').attr('class', 'entity-name');
+	    enter.append('button').attr('class', 'close').attr('title', _t('icons.deselect')).on('click', deselectEntity).call(svgIcon('#iD-icon-close')); // Update
+
+	    items = items.merge(enter);
+	    items.selectAll('.entity-geom-icon use').attr('href', function () {
+	      var entity = this.parentNode.parentNode.__data__;
+	      return '#iD-icon-' + entity.geometry(context.graph());
+	    });
+	    items.selectAll('.entity-type').html(function (entity) {
+	      return _mainPresetIndex.match(entity, context.graph()).name();
+	    });
+	    items.selectAll('.entity-name').html(function (d) {
+	      // fetch latest entity
+	      var entity = context.entity(d.id);
+	      return utilDisplayName(entity);
+	    });
+	  }
 
+	  return section;
+	}
 
-	    var link = titleContainer.selectAll('.wiki-link')
-	      .data([0]);
+	function uiEntityEditor(context) {
+	  var dispatch = dispatch$8('choose');
+	  var _state = 'select';
+	  var _coalesceChanges = false;
+	  var _modified = false;
 
-	    link = link.enter()
-	      .append('button')
-	      .attr('class', 'form-field-button wiki-link')
-	      .attr('tabindex', -1)
-	      .attr('title', _t('icons.view_on', { domain: 'wikipedia.org' }))
-	      .call(svgIcon('#iD-icon-out-link'))
-	      .merge(link);
+	  var _base;
 
-	    link
-	      .on('click', function () {
-	        event.preventDefault();
-	        if (_wikiURL) { window.open(_wikiURL, '_blank'); }
-	      });
-	  }
+	  var _entityIDs;
 
+	  var _activePresets = [];
 
-	  function defaultLanguageInfo(skipEnglishFallback) {
-	    var langCode = _mainLocalizer.languageCode().toLowerCase();
+	  var _newFeature;
 
-	    for (var i in _dataWikipedia) {
-	      var d = _dataWikipedia[i];
-	      // default to the language of iD's current locale
-	      if (d[2] === langCode) { return d; }
-	    }
+	  var _sections;
 
-	    // fallback to English
-	    return skipEnglishFallback ? ['', '', ''] : ['English', 'English', 'en'];
-	  }
+	  function entityEditor(selection) {
+	    var combinedTags = utilCombinedTags(_entityIDs, context.graph()); // Header
 
+	    var header = selection.selectAll('.header').data([0]); // Enter
 
-	  function language(skipEnglishFallback) {
-	    var value = utilGetSetValue(_langInput).toLowerCase();
+	    var headerEnter = header.enter().append('div').attr('class', 'header fillL');
+	    headerEnter.append('button').attr('class', 'preset-reset preset-choose').call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-forward' : '#iD-icon-backward'));
+	    headerEnter.append('button').attr('class', 'close').on('click', function () {
+	      context.enter(modeBrowse(context));
+	    }).call(svgIcon(_modified ? '#iD-icon-apply' : '#iD-icon-close'));
+	    headerEnter.append('h3'); // Update
 
-	    for (var i in _dataWikipedia) {
-	      var d = _dataWikipedia[i];
-	      // return the language already set in the UI, if supported
-	      if (d[0].toLowerCase() === value ||
-	        d[1].toLowerCase() === value ||
-	        d[2] === value) { return d; }
-	    }
+	    header = header.merge(headerEnter);
+	    header.selectAll('h3').html(_entityIDs.length === 1 ? _t.html('inspector.edit') : _t.html('inspector.edit_features'));
+	    header.selectAll('.preset-reset').on('click', function () {
+	      dispatch.call('choose', this, _activePresets);
+	    }); // Body
 
-	    // fallback to English
-	    return defaultLanguageInfo(skipEnglishFallback);
-	  }
+	    var body = selection.selectAll('.inspector-body').data([0]); // Enter
 
+	    var bodyEnter = body.enter().append('div').attr('class', 'entity-editor inspector-body sep-top'); // Update
 
-	  function changeLang() {
-	    utilGetSetValue(_langInput, language()[1]);
-	    change(true);
-	  }
+	    body = body.merge(bodyEnter);
 
+	    if (!_sections) {
+	      _sections = [uiSectionSelectionList(context), uiSectionFeatureType(context).on('choose', function (presets) {
+	        dispatch.call('choose', this, presets);
+	      }), uiSectionEntityIssues(context), uiSectionPresetFields(context).on('change', changeTags).on('revert', revertTags), uiSectionRawTagEditor('raw-tag-editor', context).on('change', changeTags), uiSectionRawMemberEditor(context), uiSectionRawMembershipEditor(context)];
+	    }
 
-	  function blur() {
-	    change(true);
-	  }
+	    _sections.forEach(function (section) {
+	      if (section.entityIDs) {
+	        section.entityIDs(_entityIDs);
+	      }
 
+	      if (section.presets) {
+	        section.presets(_activePresets);
+	      }
 
-	  function change(skipWikidata) {
-	    var value = utilGetSetValue(_titleInput);
-	    var m = value.match(/https?:\/\/([-a-z]+)\.wikipedia\.org\/(?:wiki|\1-[-a-z]+)\/([^#]+)(?:#(.+))?/);
-	    var langInfo = m && _dataWikipedia.find(function (d) { return m[1] === d[2]; });
-	    var syncTags = {};
+	      if (section.tags) {
+	        section.tags(combinedTags);
+	      }
 
-	    if (langInfo) {
-	      var nativeLangName = langInfo[1];
-	      // Normalize title http://www.mediawiki.org/wiki/API:Query#Title_normalization
-	      value = decodeURIComponent(m[2]).replace(/_/g, ' ');
-	      if (m[3]) {
-	        var anchor;
-	        // try {
-	        // leave this out for now - #6232
-	          // Best-effort `anchordecode:` implementation
-	          // anchor = decodeURIComponent(m[3].replace(/\.([0-9A-F]{2})/g, '%$1'));
-	        // } catch (e) {
-	        anchor = decodeURIComponent(m[3]);
-	        // }
-	        value += '#' + anchor.replace(/_/g, ' ');
+	      if (section.state) {
+	        section.state(_state);
 	      }
-	      value = value.slice(0, 1).toUpperCase() + value.slice(1);
-	      utilGetSetValue(_langInput, nativeLangName);
-	      utilGetSetValue(_titleInput, value);
-	    }
 
-	    if (value) {
-	      syncTags.wikipedia = context.cleanTagValue(language()[2] + ':' + value);
-	    } else {
-	      syncTags.wikipedia = undefined;
+	      body.call(section.render);
+	    });
+
+	    context.history().on('change.entity-editor', historyChanged);
+
+	    function historyChanged(difference) {
+	      if (selection.selectAll('.entity-editor').empty()) return;
+	      if (_state === 'hide') return;
+	      var significant = !difference || difference.didChange.properties || difference.didChange.addition || difference.didChange.deletion;
+	      if (!significant) return;
+	      _entityIDs = _entityIDs.filter(context.hasEntity);
+	      if (!_entityIDs.length) return;
+	      var priorActivePreset = _activePresets.length === 1 && _activePresets[0];
+	      loadActivePresets();
+	      var graph = context.graph();
+	      entityEditor.modified(_base !== graph);
+	      entityEditor(selection);
+
+	      if (priorActivePreset && _activePresets.length === 1 && priorActivePreset !== _activePresets[0]) {
+	        // flash the button to indicate the preset changed
+	        context.container().selectAll('.entity-editor button.preset-reset .label').style('background-color', '#fff').transition().duration(750).style('background-color', null);
+	      }
 	    }
+	  } // Tag changes that fire on input can all get coalesced into a single
+	  // history operation when the user leaves the field.  #2342
+	  // Use explicit entityIDs in case the selection changes before the event is fired.
 
-	    dispatch$1.call('change', this, syncTags);
 
+	  function changeTags(entityIDs, changed, onInput) {
+	    var actions = [];
 
-	    if (skipWikidata || !value || !language()[2]) { return; }
+	    for (var i in entityIDs) {
+	      var entityID = entityIDs[i];
+	      var entity = context.entity(entityID);
+	      var tags = Object.assign({}, entity.tags); // shallow copy
 
-	    // attempt asynchronous update of wikidata tag..
-	    var initGraph = context.graph();
-	    var initEntityIDs = _entityIDs;
+	      for (var k in changed) {
+	        if (!k) continue;
+	        var v = changed[k];
 
-	    wikidata.itemsByTitle(language()[2], value, function (err, data) {
-	      if (err || !data || !Object.keys(data).length) { return; }
+	        if (v !== undefined || tags.hasOwnProperty(k)) {
+	          tags[k] = v;
+	        }
+	      }
 
-	      // If graph has changed, we can't apply this update.
-	      if (context.graph() !== initGraph) { return; }
+	      if (!onInput) {
+	        tags = utilCleanTags(tags);
+	      }
 
-	      var qids = Object.keys(data);
-	      var value = qids && qids.find(function (id) { return id.match(/^Q\d+$/); });
+	      if (!fastDeepEqual(entity.tags, tags)) {
+	        actions.push(actionChangeTags(entityID, tags));
+	      }
+	    }
 
-	      var actions = initEntityIDs.map(function (entityID) {
-	        var entity = context.entity(entityID).tags;
-	        var currTags = Object.assign({}, entity);  // shallow copy
-	        if (currTags.wikidata !== value) {
-	            currTags.wikidata = value;
-	            return actionChangeTags(entityID, currTags);
-	        }
-	      }).filter(Boolean);
+	    if (actions.length) {
+	      var combinedAction = function combinedAction(graph) {
+	        actions.forEach(function (action) {
+	          graph = action(graph);
+	        });
+	        return graph;
+	      };
 
-	      if (!actions.length) { return; }
+	      var annotation = _t('operations.change_tags.annotation');
 
-	      // Coalesce the update of wikidata tag into the previous tag change
-	      context.overwrite(
-	        function actionUpdateWikidataTags(graph) {
-	          actions.forEach(function(action) {
-	            graph = action(graph);
-	          });
-	          return graph;
-	        },
-	        context.history().undoAnnotation()
-	      );
+	      if (_coalesceChanges) {
+	        context.overwrite(combinedAction, annotation);
+	      } else {
+	        context.perform(combinedAction, annotation);
+	        _coalesceChanges = !!onInput;
+	      }
+	    } // if leaving field (blur event), rerun validation
 
-	      // do not dispatch.call('change') here, because entity_editor
-	      // changeTags() is not intended to be called asynchronously
-	    });
+
+	    if (!onInput) {
+	      context.validator().validate();
+	    }
 	  }
 
+	  function revertTags(keys) {
+	    var actions = [];
 
-	  wiki.tags = function (tags) {
-	    _tags = tags;
-	    updateForTags(tags);
-	  };
+	    for (var i in _entityIDs) {
+	      var entityID = _entityIDs[i];
+	      var original = context.graph().base().entities[entityID];
+	      var changed = {};
 
-	  function updateForTags(tags) {
+	      for (var j in keys) {
+	        var key = keys[j];
+	        changed[key] = original ? original.tags[key] : undefined;
+	      }
 
-	    var value = typeof tags[field.key] === 'string' ? tags[field.key] : '';
-	    // Expect tag format of `tagLang:tagArticleTitle`, e.g. `fr:Paris`, with
-	    // optional suffix of `#anchor`
-	    var m = value.match(/([^:]+):([^#]+)(?:#(.+))?/);
-	    var tagLang = m && m[1];
-	    var tagArticleTitle = m && m[2];
-	    var anchor = m && m[3];
-	    var tagLangInfo = tagLang && _dataWikipedia.find(function (d) { return tagLang === d[2]; });
+	      var entity = context.entity(entityID);
+	      var tags = Object.assign({}, entity.tags); // shallow copy
 
-	    // value in correct format
-	    if (tagLangInfo) {
-	      var nativeLangName = tagLangInfo[1];
-	      utilGetSetValue(_langInput, nativeLangName);
-	      utilGetSetValue(_titleInput, tagArticleTitle + (anchor ? ('#' + anchor) : ''));
-	      if (anchor) {
-	        try {
-	          // Best-effort `anchorencode:` implementation
-	          anchor = encodeURIComponent(anchor.replace(/ /g, '_')).replace(/%/g, '.');
-	        } catch (e) {
-	          anchor = anchor.replace(/ /g, '_');
+	      for (var k in changed) {
+	        if (!k) continue;
+	        var v = changed[k];
+
+	        if (v !== undefined || tags.hasOwnProperty(k)) {
+	          tags[k] = v;
 	        }
 	      }
-	      _wikiURL = 'https://' + tagLang + '.wikipedia.org/wiki/' +
-	        tagArticleTitle.replace(/ /g, '_') + (anchor ? ('#' + anchor) : '');
 
-	    // unrecognized value format
-	    } else {
-	      utilGetSetValue(_titleInput, value);
-	      if (value && value !== '') {
-	        utilGetSetValue(_langInput, '');
-	        var defaultLangInfo = defaultLanguageInfo();
-	        _wikiURL = "https://" + (defaultLangInfo[2]) + ".wikipedia.org/w/index.php?fulltext=1&search=" + value;
+	      tags = utilCleanTags(tags);
+
+	      if (!fastDeepEqual(entity.tags, tags)) {
+	        actions.push(actionChangeTags(entityID, tags));
+	      }
+	    }
+
+	    if (actions.length) {
+	      var combinedAction = function combinedAction(graph) {
+	        actions.forEach(function (action) {
+	          graph = action(graph);
+	        });
+	        return graph;
+	      };
+
+	      var annotation = _t('operations.change_tags.annotation');
+
+	      if (_coalesceChanges) {
+	        context.overwrite(combinedAction, annotation);
 	      } else {
-	        var shownOrDefaultLangInfo = language(true /* skipEnglishFallback */);
-	        utilGetSetValue(_langInput, shownOrDefaultLangInfo[1]);
-	        _wikiURL = '';
+	        context.perform(combinedAction, annotation);
+	        _coalesceChanges = false;
 	      }
 	    }
+
+	    context.validator().validate();
 	  }
 
+	  entityEditor.modified = function (val) {
+	    if (!arguments.length) return _modified;
+	    _modified = val;
+	    return entityEditor;
+	  };
 
-	  wiki.entityIDs = function (val) {
-	    if (!arguments$1.length) { return _entityIDs; }
-	    _entityIDs = val;
-	    return wiki;
+	  entityEditor.state = function (val) {
+	    if (!arguments.length) return _state;
+	    _state = val;
+	    return entityEditor;
 	  };
 
+	  entityEditor.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs; // always reload these even if the entityIDs are unchanged, since we
+	    // could be reselecting after something like dragging a node
 
-	  wiki.focus = function () {
-	    _titleInput.node().focus();
-	  };
+	    _base = context.graph();
+	    _coalesceChanges = false;
+	    if (val && _entityIDs && utilArrayIdentical(_entityIDs, val)) return entityEditor; // exit early if no change
 
+	    _entityIDs = val;
+	    loadActivePresets(true);
+	    return entityEditor.modified(false);
+	  };
 
-	  return utilRebind(wiki, dispatch$1, 'on');
-	}
+	  entityEditor.newFeature = function (val) {
+	    if (!arguments.length) return _newFeature;
+	    _newFeature = val;
+	    return entityEditor;
+	  };
 
-	uiFieldWikipedia.supportsMultiselection = false;
+	  function loadActivePresets(isForNewSelection) {
+	    var graph = context.graph();
+	    var counts = {};
 
-	var uiFields = {
-	    access: uiFieldAccess,
-	    address: uiFieldAddress,
-	    check: uiFieldCheck,
-	    combo: uiFieldCombo,
-	    cycleway: uiFieldCycleway,
-	    defaultCheck: uiFieldCheck,
-	    email: uiFieldText,
-	    identifier: uiFieldText,
-	    lanes: uiFieldLanes,
-	    localized: uiFieldLocalized,
-	    maxspeed: uiFieldMaxspeed,
-	    multiCombo: uiFieldCombo,
-	    networkCombo: uiFieldCombo,
-	    number: uiFieldText,
-	    onewayCheck: uiFieldCheck,
-	    radio: uiFieldRadio,
-	    restrictions: uiFieldRestrictions,
-	    semiCombo: uiFieldCombo,
-	    structureRadio: uiFieldRadio,
-	    tel: uiFieldText,
-	    text: uiFieldText,
-	    textarea: uiFieldTextarea,
-	    typeCombo: uiFieldCombo,
-	    url: uiFieldText,
-	    wikidata: uiFieldWikidata,
-	    wikipedia: uiFieldWikipedia
-	};
+	    for (var i in _entityIDs) {
+	      var entity = graph.hasEntity(_entityIDs[i]);
+	      if (!entity) return;
+	      var match = _mainPresetIndex.match(entity, graph);
+	      if (!counts[match.id]) counts[match.id] = 0;
+	      counts[match.id] += 1;
+	    }
 
-	function uiField(context, presetField, entityIDs, options) {
-	    options = Object.assign({
-	        show: true,
-	        wrap: true,
-	        remove: true,
-	        revert: true,
-	        info: true
-	    }, options);
+	    var matches = Object.keys(counts).sort(function (p1, p2) {
+	      return counts[p2] - counts[p1];
+	    }).map(function (pID) {
+	      return _mainPresetIndex.item(pID);
+	    });
 
-	    var dispatch$1 = dispatch('change', 'revert');
-	    var field = Object.assign({}, presetField);   // shallow copy
-	    field.domId = utilUniqueDomId('form-field-' + field.safeid);
-	    var _show = options.show;
-	    var _state = '';
-	    var _tags = {};
+	    if (!isForNewSelection) {
+	      // A "weak" preset doesn't set any tags. (e.g. "Address")
+	      var weakPreset = _activePresets.length === 1 && !_activePresets[0].isFallback() && Object.keys(_activePresets[0].addTags || {}).length === 0; // Don't replace a weak preset with a fallback preset (e.g. "Point")
 
-	    var _locked = false;
-	    var _lockedTip = uiTooltip()
-	        .title(_t('inspector.lock.suggestion', { label: field.label }))
-	        .placement('bottom');
+	      if (weakPreset && matches.length === 1 && matches[0].isFallback()) return;
+	    }
 
+	    entityEditor.presets(matches);
+	  }
 
-	    field.keys = field.keys || [field.key];
+	  entityEditor.presets = function (val) {
+	    if (!arguments.length) return _activePresets; // don't reload the same preset
 
-	    // only create the fields that are actually being shown
-	    if (_show && !field.impl) {
-	        createField();
+	    if (!utilArrayIdentical(val, _activePresets)) {
+	      _activePresets = val;
 	    }
 
-	    // Creates the field.. This is done lazily,
-	    // once we know that the field will be shown.
-	    function createField() {
-	        field.impl = uiFields[field.type](field, context)
-	            .on('change', function(t, onInput) {
-	                dispatch$1.call('change', field, t, onInput);
-	            });
+	    return entityEditor;
+	  };
 
-	        if (entityIDs) {
-	            field.entityIDs = entityIDs;
-	            // if this field cares about the entities, pass them along
-	            if (field.impl.entityIDs) {
-	                field.impl.entityIDs(entityIDs);
-	            }
-	        }
+	  return utilRebind(entityEditor, dispatch, 'on');
+	}
+
+	function uiPresetList(context) {
+	  var dispatch = dispatch$8('cancel', 'choose');
+
+	  var _entityIDs;
+
+	  var _currLoc;
+
+	  var _currentPresets;
+
+	  var _autofocus = false;
+
+	  function presetList(selection) {
+	    if (!_entityIDs) return;
+	    var presets = _mainPresetIndex.matchAllGeometry(entityGeometries());
+	    selection.html('');
+	    var messagewrap = selection.append('div').attr('class', 'header fillL');
+	    var message = messagewrap.append('h3').html(_t.html('inspector.choose'));
+	    messagewrap.append('button').attr('class', 'preset-choose').on('click', function () {
+	      dispatch.call('cancel', this);
+	    }).call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward'));
+
+	    function initialKeydown(d3_event) {
+	      // hack to let delete shortcut work when search is autofocused
+	      if (search.property('value').length === 0 && (d3_event.keyCode === utilKeybinding.keyCodes['⌫'] || d3_event.keyCode === utilKeybinding.keyCodes['⌦'])) {
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation();
+	        operationDelete(context, _entityIDs)(); // hack to let undo work when search is autofocused
+	      } else if (search.property('value').length === 0 && (d3_event.ctrlKey || d3_event.metaKey) && d3_event.keyCode === utilKeybinding.keyCodes.z) {
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation();
+	        context.undo();
+	      } else if (!d3_event.ctrlKey && !d3_event.metaKey) {
+	        // don't check for delete/undo hack on future keydown events
+	        select(this).on('keydown', keydown);
+	        keydown.call(this, d3_event);
+	      }
 	    }
 
+	    function keydown(d3_event) {
+	      // down arrow
+	      if (d3_event.keyCode === utilKeybinding.keyCodes['↓'] && // if insertion point is at the end of the string
+	      search.node().selectionStart === search.property('value').length) {
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation(); // move focus to the first item in the preset list
 
-	    function isModified() {
-	        if (!entityIDs || !entityIDs.length) { return false; }
-	        return entityIDs.some(function(entityID) {
-	            var original = context.graph().base().entities[entityID];
-	            var latest = context.graph().entity(entityID);
-	            return field.keys.some(function(key) {
-	                return original ? latest.tags[key] !== original.tags[key] : latest.tags[key];
-	            });
-	        });
+	        var buttons = list.selectAll('.preset-list-button');
+	        if (!buttons.empty()) buttons.nodes()[0].focus();
+	      }
 	    }
 
+	    function keypress(d3_event) {
+	      // enter
+	      var value = search.property('value');
 
-	    function tagsContainFieldKey() {
-	        return field.keys.some(function(key) {
-	            if (field.type === 'multiCombo') {
-	                for (var tagKey in _tags) {
-	                    if (tagKey.indexOf(key) === 0) {
-	                        return true;
-	                    }
-	                }
-	                return false;
-	            }
-	            return _tags[key] !== undefined;
+	      if (d3_event.keyCode === 13 && // ↩ Return
+	      value.length) {
+	        list.selectAll('.preset-list-item:first-child').each(function (d) {
+	          d.choose.call(this);
 	        });
+	      }
 	    }
 
+	    function inputevent() {
+	      var value = search.property('value');
+	      list.classed('filtered', value.length);
+	      var results, messageText;
 
-	    function revert(d) {
-	        event.stopPropagation();
-	        event.preventDefault();
-	        if (!entityIDs || _locked) { return; }
+	      if (value.length) {
+	        results = presets.search(value, entityGeometries()[0], _currLoc);
+	        messageText = _t('inspector.results', {
+	          n: results.collection.length,
+	          search: value
+	        });
+	      } else {
+	        results = _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro(), _currLoc);
+	        messageText = _t('inspector.choose');
+	      }
 
-	        dispatch$1.call('revert', d, d.keys);
+	      list.call(drawList, results);
+	      message.html(messageText);
 	    }
 
+	    var searchWrap = selection.append('div').attr('class', 'search-header');
+	    searchWrap.call(svgIcon('#iD-icon-search', 'pre-text'));
+	    var search = searchWrap.append('input').attr('class', 'preset-search-input').attr('placeholder', _t('inspector.search')).attr('type', 'search').call(utilNoAuto).on('keydown', initialKeydown).on('keypress', keypress).on('input', debounce(inputevent));
 
-	    function remove(d) {
-	        event.stopPropagation();
-	        event.preventDefault();
-	        if (_locked) { return; }
-
-	        var t = {};
-	        d.keys.forEach(function(key) {
-	            t[key] = undefined;
-	        });
+	    if (_autofocus) {
+	      search.node().focus(); // Safari 14 doesn't always like to focus immediately,
+	      // so try again on the next pass
 
-	        dispatch$1.call('change', d, t);
+	      setTimeout(function () {
+	        search.node().focus();
+	      }, 0);
 	    }
 
+	    var listWrap = selection.append('div').attr('class', 'inspector-body');
+	    var list = listWrap.append('div').attr('class', 'preset-list').call(drawList, _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro(), _currLoc));
+	    context.features().on('change.preset-list', updateForFeatureHiddenState);
+	  }
 
-	    field.render = function(selection) {
-	        var container = selection.selectAll('.form-field')
-	            .data([field]);
-
-	        // Enter
-	        var enter = container.enter()
-	            .append('div')
-	            .attr('class', function(d) { return 'form-field form-field-' + d.safeid; })
-	            .classed('nowrap', !options.wrap);
-
-	        if (options.wrap) {
-	            var labelEnter = enter
-	                .append('label')
-	                .attr('class', 'field-label')
-	                .attr('for', function(d) { return d.domId; });
-
-	            var textEnter = labelEnter
-	                .append('span')
-	                .attr('class', 'label-text');
-
-	            textEnter
-	                .append('span')
-	                .attr('class', 'label-textvalue')
-	                .text(function(d) { return d.label(); });
-
-	            textEnter
-	                .append('span')
-	                .attr('class', 'label-textannotation');
-
-	            if (options.remove) {
-	                labelEnter
-	                    .append('button')
-	                    .attr('class', 'remove-icon')
-	                    .attr('title', _t('icons.remove'))
-	                    .attr('tabindex', -1)
-	                    .call(svgIcon('#iD-operation-delete'));
-	            }
+	  function drawList(list, presets) {
+	    presets = presets.matchAllGeometry(entityGeometries());
+	    var collection = presets.collection.reduce(function (collection, preset) {
+	      if (!preset) return collection;
 
-	            if (options.revert) {
-	                labelEnter
-	                    .append('button')
-	                    .attr('class', 'modified-icon')
-	                    .attr('title', _t('icons.undo'))
-	                    .attr('tabindex', -1)
-	                    .call(svgIcon((_mainLocalizer.textDirection() === 'rtl') ? '#iD-icon-redo' : '#iD-icon-undo'));
-	            }
+	      if (preset.members) {
+	        if (preset.members.collection.filter(function (preset) {
+	          return preset.addable();
+	        }).length > 1) {
+	          collection.push(CategoryItem(preset));
 	        }
+	      } else if (preset.addable()) {
+	        collection.push(PresetItem(preset));
+	      }
 
+	      return collection;
+	    }, []);
+	    var items = list.selectAll('.preset-list-item').data(collection, function (d) {
+	      return d.preset.id;
+	    });
+	    items.order();
+	    items.exit().remove();
+	    items.enter().append('div').attr('class', function (item) {
+	      return 'preset-list-item preset-' + item.preset.id.replace('/', '-');
+	    }).classed('current', function (item) {
+	      return _currentPresets.indexOf(item.preset) !== -1;
+	    }).each(function (item) {
+	      select(this).call(item);
+	    }).style('opacity', 0).transition().style('opacity', 1);
+	    updateForFeatureHiddenState();
+	  }
+
+	  function itemKeydown(d3_event) {
+	    // the actively focused item
+	    var item = select(this.closest('.preset-list-item'));
+	    var parentItem = select(item.node().parentNode.closest('.preset-list-item')); // arrow down, move focus to the next, lower item
+
+	    if (d3_event.keyCode === utilKeybinding.keyCodes['↓']) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation(); // the next item in the list at the same level
+
+	      var nextItem = select(item.node().nextElementSibling); // if there is no next item in this list
+
+	      if (nextItem.empty()) {
+	        // if there is a parent item
+	        if (!parentItem.empty()) {
+	          // the item is the last item of a sublist,
+	          // select the next item at the parent level
+	          nextItem = select(parentItem.node().nextElementSibling);
+	        } // if the focused item is expanded
+
+	      } else if (select(this).classed('expanded')) {
+	        // select the first subitem instead
+	        nextItem = item.select('.subgrid .preset-list-item:first-child');
+	      }
 
-	        // Update
-	        container = container
-	            .merge(enter);
+	      if (!nextItem.empty()) {
+	        // focus on the next item
+	        nextItem.select('.preset-list-button').node().focus();
+	      } // arrow up, move focus to the previous, higher item
 
-	        container.select('.field-label > .remove-icon')  // propagate bound data
-	            .on('click', remove);
+	    } else if (d3_event.keyCode === utilKeybinding.keyCodes['↑']) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation(); // the previous item in the list at the same level
 
-	        container.select('.field-label > .modified-icon')  // propagate bound data
-	            .on('click', revert);
+	      var previousItem = select(item.node().previousElementSibling); // if there is no previous item in this list
 
-	        container
-	            .each(function(d) {
-	                var selection = select(this);
+	      if (previousItem.empty()) {
+	        // if there is a parent item
+	        if (!parentItem.empty()) {
+	          // the item is the first subitem of a sublist select the parent item
+	          previousItem = parentItem;
+	        } // if the previous item is expanded
 
-	                if (!d.impl) {
-	                    createField();
-	                }
+	      } else if (previousItem.select('.preset-list-button').classed('expanded')) {
+	        // select the last subitem of the sublist of the previous item
+	        previousItem = previousItem.select('.subgrid .preset-list-item:last-child');
+	      }
 
-	                var reference, help;
+	      if (!previousItem.empty()) {
+	        // focus on the previous item
+	        previousItem.select('.preset-list-button').node().focus();
+	      } else {
+	        // the focus is at the top of the list, move focus back to the search field
+	        var search = select(this.closest('.preset-list-pane')).select('.preset-search-input');
+	        search.node().focus();
+	      } // arrow left, move focus to the parent item if there is one
 
-	                // instantiate field help
-	                if (options.wrap && field.type === 'restrictions') {
-	                    help = uiFieldHelp(context, 'restrictions');
-	                }
+	    } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '→' : '←']) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation(); // if there is a parent item, focus on the parent item
 
-	                // instantiate tag reference
-	                if (options.wrap && options.info) {
-	                    var referenceKey = d.key;
-	                    if (d.type === 'multiCombo') {   // lookup key without the trailing ':'
-	                        referenceKey = referenceKey.replace(/:$/, '');
-	                    }
+	      if (!parentItem.empty()) {
+	        parentItem.select('.preset-list-button').node().focus();
+	      } // arrow right, choose this item
 
-	                    reference = uiTagReference(d.reference || { key: referenceKey });
-	                    if (_state === 'hover') {
-	                        reference.showing(false);
-	                    }
-	                }
+	    } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '←' : '→']) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation();
+	      item.datum().choose.call(select(this).node());
+	    }
+	  }
 
-	                selection
-	                    .call(d.impl);
+	  function CategoryItem(preset) {
+	    var box,
+	        sublist,
+	        shown = false;
 
-	                // add field help components
-	                if (help) {
-	                    selection
-	                        .call(help.body)
-	                        .select('.field-label')
-	                        .call(help.button);
-	                }
+	    function item(selection) {
+	      var wrap = selection.append('div').attr('class', 'preset-list-button-wrap category');
 
-	                // add tag reference components
-	                if (reference) {
-	                    selection
-	                        .call(reference.body)
-	                        .select('.field-label')
-	                        .call(reference.button);
-	                }
+	      function click() {
+	        var isExpanded = select(this).classed('expanded');
+	        var iconName = isExpanded ? _mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward' : '#iD-icon-down';
+	        select(this).classed('expanded', !isExpanded);
+	        select(this).selectAll('div.label-inner svg.icon use').attr('href', iconName);
+	        item.choose();
+	      }
 
-	                d.impl.tags(_tags);
-	            });
+	      var geometries = entityGeometries();
+	      var button = wrap.append('button').attr('class', 'preset-list-button').classed('expanded', false).call(uiPresetIcon().geometry(geometries.length === 1 && geometries[0]).preset(preset)).on('click', click).on('keydown', function (d3_event) {
+	        // right arrow, expand the focused item
+	        if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '←' : '→']) {
+	          d3_event.preventDefault();
+	          d3_event.stopPropagation(); // if the item isn't expanded
+
+	          if (!select(this).classed('expanded')) {
+	            // toggle expansion (expand the item)
+	            click.call(this, d3_event);
+	          } // left arrow, collapse the focused item
+
+	        } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '→' : '←']) {
+	          d3_event.preventDefault();
+	          d3_event.stopPropagation(); // if the item is expanded
+
+	          if (select(this).classed('expanded')) {
+	            // toggle expansion (collapse the item)
+	            click.call(this, d3_event);
+	          }
+	        } else {
+	          itemKeydown.call(this, d3_event);
+	        }
+	      });
+	      var label = button.append('div').attr('class', 'label').append('div').attr('class', 'label-inner');
+	      label.append('div').attr('class', 'namepart').call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward', 'inline')).append('span').html(function () {
+	        return preset.nameLabel() + '&hellip;';
+	      });
+	      box = selection.append('div').attr('class', 'subgrid').style('max-height', '0px').style('opacity', 0);
+	      box.append('div').attr('class', 'arrow');
+	      sublist = box.append('div').attr('class', 'preset-list fillL3');
+	    }
 
+	    item.choose = function () {
+	      if (!box || !sublist) return;
 
-	            container
-	                .classed('locked', _locked)
-	                .classed('modified', isModified())
-	                .classed('present', tagsContainFieldKey());
+	      if (shown) {
+	        shown = false;
+	        box.transition().duration(200).style('opacity', '0').style('max-height', '0px').style('padding-bottom', '0px');
+	      } else {
+	        shown = true;
+	        var members = preset.members.matchAllGeometry(entityGeometries());
+	        sublist.call(drawList, members);
+	        box.transition().duration(200).style('opacity', '1').style('max-height', 200 + members.collection.length * 190 + 'px').style('padding-bottom', '10px');
+	      }
+	    };
 
+	    item.preset = preset;
+	    return item;
+	  }
 
-	            // show a tip and lock icon if the field is locked
-	            var annotation = container.selectAll('.field-label .label-textannotation');
-	            var icon = annotation.selectAll('.icon')
-	                .data(_locked ? [0]: []);
+	  function PresetItem(preset) {
+	    function item(selection) {
+	      var wrap = selection.append('div').attr('class', 'preset-list-button-wrap');
+	      var geometries = entityGeometries();
+	      var button = wrap.append('button').attr('class', 'preset-list-button').call(uiPresetIcon().geometry(geometries.length === 1 && geometries[0]).preset(preset)).on('click', item.choose).on('keydown', itemKeydown);
+	      var label = button.append('div').attr('class', 'label').append('div').attr('class', 'label-inner');
+	      var nameparts = [preset.nameLabel(), preset.subtitleLabel()].filter(Boolean);
+	      label.selectAll('.namepart').data(nameparts).enter().append('div').attr('class', 'namepart').html(function (d) {
+	        return d;
+	      });
+	      wrap.call(item.reference.button);
+	      selection.call(item.reference.body);
+	    }
 
-	            icon.exit()
-	                .remove();
+	    item.choose = function () {
+	      if (select(this).classed('disabled')) return;
 
-	            icon.enter()
-	                .append('svg')
-	                .attr('class', 'icon')
-	                .append('use')
-	                .attr('xlink:href', '#fas-lock');
+	      if (!context.inIntro()) {
+	        _mainPresetIndex.setMostRecent(preset, entityGeometries()[0]);
+	      }
 
-	            container.call(_locked ? _lockedTip : _lockedTip.destroy);
-	    };
+	      context.perform(function (graph) {
+	        for (var i in _entityIDs) {
+	          var entityID = _entityIDs[i];
+	          var oldPreset = _mainPresetIndex.match(graph.entity(entityID), graph);
+	          graph = actionChangePreset(entityID, oldPreset, preset)(graph);
+	        }
 
+	        return graph;
+	      }, _t('operations.change_tags.annotation'));
+	      context.validator().validate(); // rerun validation
 
-	    field.state = function(val) {
-	        if (!arguments.length) { return _state; }
-	        _state = val;
-	        return field;
+	      dispatch.call('choose', this, preset);
 	    };
 
+	    item.help = function (d3_event) {
+	      d3_event.stopPropagation();
+	      item.reference.toggle();
+	    };
 
-	    field.tags = function(val) {
-	        if (!arguments.length) { return _tags; }
-	        _tags = val;
+	    item.preset = preset;
+	    item.reference = uiTagReference(preset.reference());
+	    return item;
+	  }
 
-	        if (tagsContainFieldKey() && !_show) {
-	            // always show a field if it has a value to display
-	            _show = true;
-	            if (!field.impl) {
-	                createField();
-	            }
-	        }
+	  function updateForFeatureHiddenState() {
+	    if (!_entityIDs.every(context.hasEntity)) return;
+	    var geometries = entityGeometries();
+	    var button = context.container().selectAll('.preset-list .preset-list-button'); // remove existing tooltips
 
-	        return field;
-	    };
+	    button.call(uiTooltip().destroyAny);
+	    button.each(function (item, index) {
+	      var hiddenPresetFeaturesId;
 
+	      for (var i in geometries) {
+	        hiddenPresetFeaturesId = context.features().isHiddenPreset(item.preset, geometries[i]);
+	        if (hiddenPresetFeaturesId) break;
+	      }
 
-	    field.locked = function(val) {
-	        if (!arguments.length) { return _locked; }
-	        _locked = val;
-	        return field;
-	    };
+	      var isHiddenPreset = !context.inIntro() && !!hiddenPresetFeaturesId && (_currentPresets.length !== 1 || item.preset !== _currentPresets[0]);
+	      select(this).classed('disabled', isHiddenPreset);
 
+	      if (isHiddenPreset) {
+	        var isAutoHidden = context.features().autoHidden(hiddenPresetFeaturesId);
+	        select(this).call(uiTooltip().title(_t.html('inspector.hidden_preset.' + (isAutoHidden ? 'zoom' : 'manual'), {
+	          features: _t.html('feature.' + hiddenPresetFeaturesId + '.description')
+	        })).placement(index < 2 ? 'bottom' : 'top'));
+	      }
+	    });
+	  }
 
-	    field.show = function() {
-	        _show = true;
-	        if (!field.impl) {
-	            createField();
-	        }
-	        if (field.default && field.key && _tags[field.key] !== field.default) {
-	            var t = {};
-	            t[field.key] = field.default;
-	            dispatch$1.call('change', this, t);
-	        }
-	    };
+	  presetList.autofocus = function (val) {
+	    if (!arguments.length) return _autofocus;
+	    _autofocus = val;
+	    return presetList;
+	  };
 
-	    // A shown field has a visible UI, a non-shown field is in the 'Add field' dropdown
-	    field.isShown = function() {
-	        return _show;
-	    };
+	  presetList.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    _currLoc = null;
 
+	    if (_entityIDs && _entityIDs.length) {
+	      // calculate current location
+	      var extent = _entityIDs.reduce(function (extent, entityID) {
+	        var entity = context.graph().entity(entityID);
+	        return extent.extend(entity.extent(context.graph()));
+	      }, geoExtent());
 
-	    // An allowed field can appear in the UI or in the 'Add field' dropdown.
-	    // A non-allowed field is hidden from the user altogether
-	    field.isAllowed = function() {
+	      _currLoc = extent.center(); // match presets
 
-	        if (entityIDs &&
-	            entityIDs.length > 1 &&
-	            uiFields[field.type].supportsMultiselection === false) { return false; }
+	      var presets = _entityIDs.map(function (entityID) {
+	        return _mainPresetIndex.match(context.entity(entityID), context.graph());
+	      });
 
-	        if (field.geometry && !entityIDs.every(function(entityID) {
-	            return field.matchGeometry(context.graph().geometry(entityID));
-	        })) { return false; }
+	      presetList.presets(presets);
+	    }
 
-	        if (field.countryCodes || field.notCountryCodes) {
-	            var extent = combinedEntityExtent();
-	            if (!extent) { return true; }
+	    return presetList;
+	  };
 
-	            var center = extent.center();
-	            var countryCode = iso1A2Code(center);
+	  presetList.presets = function (val) {
+	    if (!arguments.length) return _currentPresets;
+	    _currentPresets = val;
+	    return presetList;
+	  };
 
-	            if (!countryCode) { return false; }
+	  function entityGeometries() {
+	    var counts = {};
 
-	            countryCode = countryCode.toLowerCase();
+	    for (var i in _entityIDs) {
+	      var entityID = _entityIDs[i];
+	      var entity = context.entity(entityID);
+	      var geometry = entity.geometry(context.graph()); // Treat entities on addr:interpolation lines as points, not vertices (#3241)
 
-	            if (field.countryCodes && field.countryCodes.indexOf(countryCode) === -1) {
-	                return false;
-	            }
-	            if (field.notCountryCodes && field.notCountryCodes.indexOf(countryCode) !== -1) {
-	                return false;
-	            }
-	        }
+	      if (geometry === 'vertex' && entity.isOnAddressLine(context.graph())) {
+	        geometry = 'point';
+	      }
 
-	        var prerequisiteTag = field.prerequisiteTag;
+	      if (!counts[geometry]) counts[geometry] = 0;
+	      counts[geometry] += 1;
+	    }
 
-	        if (entityIDs &&
-	            !tagsContainFieldKey() && // ignore tagging prerequisites if a value is already present
-	            prerequisiteTag) {
+	    return Object.keys(counts).sort(function (geom1, geom2) {
+	      return counts[geom2] - counts[geom1];
+	    });
+	  }
 
-	            if (!entityIDs.every(function(entityID) {
-	                var entity = context.graph().entity(entityID);
-	                if (prerequisiteTag.key) {
-	                    var value = entity.tags[prerequisiteTag.key];
-	                    if (!value) { return false; }
+	  return utilRebind(presetList, dispatch, 'on');
+	}
 
-	                    if (prerequisiteTag.valueNot) {
-	                        return prerequisiteTag.valueNot !== value;
-	                    }
-	                    if (prerequisiteTag.value) {
-	                        return prerequisiteTag.value === value;
-	                    }
-	                } else if (prerequisiteTag.keyNot) {
-	                    if (entity.tags[prerequisiteTag.keyNot]) { return false; }
-	                }
-	                return true;
-	            })) { return false; }
-	        }
+	function uiViewOnOSM(context) {
+	  var _what; // an osmEntity or osmNote
 
-	        return true;
-	    };
 
+	  function viewOnOSM(selection) {
+	    var url;
 
-	    field.focus = function() {
-	        if (field.impl) {
-	            field.impl.focus();
-	        }
-	    };
+	    if (_what instanceof osmEntity) {
+	      url = context.connection().entityURL(_what);
+	    } else if (_what instanceof osmNote) {
+	      url = context.connection().noteURL(_what);
+	    }
 
+	    var data = !_what || _what.isNew() ? [] : [_what];
+	    var link = selection.selectAll('.view-on-osm').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
-	    function combinedEntityExtent() {
-	        return entityIDs && entityIDs.length && entityIDs.reduce(function(extent, entityID) {
-	            var entity = context.graph().entity(entityID);
-	            return extent.extend(entity.extent(context.graph()));
-	        }, geoExtent());
-	    }
+	    link.exit().remove(); // enter
+
+	    var linkEnter = link.enter().append('a').attr('class', 'view-on-osm').attr('target', '_blank').attr('href', url).call(svgIcon('#iD-icon-out-link', 'inline'));
+	    linkEnter.append('span').html(_t.html('inspector.view_on_osm'));
+	  }
 
+	  viewOnOSM.what = function (_) {
+	    if (!arguments.length) return _what;
+	    _what = _;
+	    return viewOnOSM;
+	  };
 
-	    return utilRebind(field, dispatch$1, 'on');
+	  return viewOnOSM;
 	}
 
-	function uiFormFields(context) {
-	    var moreCombo = uiCombobox(context, 'more-fields').minItems(1);
-	    var _fieldsArr = [];
-	    var _lastPlaceholder = '';
-	    var _state = '';
-	    var _klass = '';
+	function uiInspector(context) {
+	  var presetList = uiPresetList(context);
+	  var entityEditor = uiEntityEditor(context);
+	  var wrap = select(null),
+	      presetPane = select(null),
+	      editorPane = select(null);
+	  var _state = 'select';
 
+	  var _entityIDs;
 
-	    function formFields(selection) {
-	        var allowedFields = _fieldsArr.filter(function(field) { return field.isAllowed(); });
-	        var shown = allowedFields.filter(function(field) { return field.isShown(); });
-	        var notShown = allowedFields.filter(function(field) { return !field.isShown(); });
+	  var _newFeature = false;
 
-	        var container = selection.selectAll('.form-fields-container')
-	            .data([0]);
+	  function inspector(selection) {
+	    presetList.entityIDs(_entityIDs).autofocus(_newFeature).on('choose', inspector.setPreset).on('cancel', function () {
+	      inspector.setPreset();
+	    });
+	    entityEditor.state(_state).entityIDs(_entityIDs).on('choose', inspector.showList);
+	    wrap = selection.selectAll('.panewrap').data([0]);
+	    var enter = wrap.enter().append('div').attr('class', 'panewrap');
+	    enter.append('div').attr('class', 'preset-list-pane pane');
+	    enter.append('div').attr('class', 'entity-editor-pane pane');
+	    wrap = wrap.merge(enter);
+	    presetPane = wrap.selectAll('.preset-list-pane');
+	    editorPane = wrap.selectAll('.entity-editor-pane');
 
-	        container = container.enter()
-	            .append('div')
-	            .attr('class', 'form-fields-container ' + (_klass || ''))
-	            .merge(container);
+	    function shouldDefaultToPresetList() {
+	      // always show the inspector on hover
+	      if (_state !== 'select') return false; // can only change preset on single selection
 
+	      if (_entityIDs.length !== 1) return false;
+	      var entityID = _entityIDs[0];
+	      var entity = context.hasEntity(entityID);
+	      if (!entity) return false; // default to inspector if there are already tags
 
-	        var fields = container.selectAll('.wrap-form-field')
-	            .data(shown, function(d) { return d.id + (d.entityIDs ? d.entityIDs.join() : ''); });
+	      if (entity.hasNonGeometryTags()) return false; // prompt to select preset if feature is new and untagged
 
-	        fields.exit()
-	            .remove();
+	      if (_newFeature) return true; // all existing features except vertices should default to inspector
 
-	        // Enter
-	        var enter = fields.enter()
-	            .append('div')
-	            .attr('class', function(d) { return 'wrap-form-field wrap-form-field-' + d.safeid; });
+	      if (entity.geometry(context.graph()) !== 'vertex') return false; // show vertex relations if any
 
-	        // Update
-	        fields = fields
-	            .merge(enter);
+	      if (context.graph().parentRelations(entity).length) return false; // show vertex issues if there are any
 
-	        fields
-	            .order()
-	            .each(function(d) {
-	                select(this)
-	                    .call(d.render);
-	            });
+	      if (context.validator().getEntityIssues(entityID).length) return false; // show turn retriction editor for junction vertices
 
+	      if (entity.isHighwayIntersection(context.graph())) return false; // otherwise show preset list for uninteresting vertices
 
-	        var titles = [];
-	        var moreFields = notShown.map(function(field) {
-	            var label = field.label();
-	            titles.push(label);
+	      return true;
+	    }
 
-	            var terms = field.terms();
-	            if (field.key) { terms.push(field.key); }
-	            if (field.keys) { terms = terms.concat(field.keys); }
+	    if (shouldDefaultToPresetList()) {
+	      wrap.style('right', '-100%');
+	      editorPane.classed('hide', true);
+	      presetPane.classed('hide', false).call(presetList);
+	    } else {
+	      wrap.style('right', '0%');
+	      presetPane.classed('hide', true);
+	      editorPane.classed('hide', false).call(entityEditor);
+	    }
 
-	            return {
-	                title: label,
-	                value: label,
-	                field: field,
-	                terms: terms
-	            };
-	        });
+	    var footer = selection.selectAll('.footer').data([0]);
+	    footer = footer.enter().append('div').attr('class', 'footer').merge(footer);
+	    footer.call(uiViewOnOSM(context).what(context.hasEntity(_entityIDs.length === 1 && _entityIDs[0])));
+	  }
 
-	        var placeholder = titles.slice(0,3).join(', ') + ((titles.length > 3) ? '…' : '');
+	  inspector.showList = function (presets) {
+	    presetPane.classed('hide', false);
+	    wrap.transition().styleTween('right', function () {
+	      return interpolate$1('0%', '-100%');
+	    }).on('end', function () {
+	      editorPane.classed('hide', true);
+	    });
 
+	    if (presets) {
+	      presetList.presets(presets);
+	    }
 
-	        var more = selection.selectAll('.more-fields')
-	            .data((_state === 'hover' || moreFields.length === 0) ? [] : [0]);
+	    presetPane.call(presetList.autofocus(true));
+	  };
 
-	        more.exit()
-	            .remove();
+	  inspector.setPreset = function (preset) {
+	    // upon setting multipolygon, go to the area preset list instead of the editor
+	    if (preset && preset.id === 'type/multipolygon') {
+	      presetPane.call(presetList.autofocus(true));
+	    } else {
+	      editorPane.classed('hide', false);
+	      wrap.transition().styleTween('right', function () {
+	        return interpolate$1('-100%', '0%');
+	      }).on('end', function () {
+	        presetPane.classed('hide', true);
+	      });
 
-	        var moreEnter = more.enter()
-	            .append('div')
-	            .attr('class', 'more-fields')
-	            .append('label');
-
-	        moreEnter
-	            .append('span')
-	            .text(_t('inspector.add_fields'));
-
-	        more = moreEnter
-	            .merge(more);
-
-
-	        var input = more.selectAll('.value')
-	            .data([0]);
-
-	        input.exit()
-	            .remove();
-
-	        input = input.enter()
-	            .append('input')
-	            .attr('class', 'value')
-	            .attr('type', 'text')
-	            .attr('placeholder', placeholder)
-	            .call(utilNoAuto)
-	            .merge(input);
-
-	        input
-	            .call(utilGetSetValue, '')
-	            .call(moreCombo
-	                .data(moreFields)
-	                .on('accept', function (d) {
-	                    if (!d) { return; }  // user entered something that was not matched
-	                    var field = d.field;
-	                    field.show();
-	                    selection.call(formFields);  // rerender
-	                    if (field.type !== 'semiCombo' && field.type !== 'multiCombo') {
-	                        field.focus();
-	                    }
-	                })
-	            );
+	      if (preset) {
+	        entityEditor.presets([preset]);
+	      }
 
-	        // avoid updating placeholder excessively (triggers style recalc)
-	        if (_lastPlaceholder !== placeholder) {
-	            input.attr('placeholder', placeholder);
-	            _lastPlaceholder = placeholder;
-	        }
+	      editorPane.call(entityEditor);
 	    }
+	  };
 
+	  inspector.state = function (val) {
+	    if (!arguments.length) return _state;
+	    _state = val;
+	    entityEditor.state(_state); // remove any old field help overlay that might have gotten attached to the inspector
 
-	    formFields.fieldsArr = function(val) {
-	        if (!arguments.length) { return _fieldsArr; }
-	        _fieldsArr = val || [];
-	        return formFields;
-	    };
-
-	    formFields.state = function(val) {
-	        if (!arguments.length) { return _state; }
-	        _state = val;
-	        return formFields;
-	    };
+	    context.container().selectAll('.field-help-body').remove();
+	    return inspector;
+	  };
 
-	    formFields.klass = function(val) {
-	        if (!arguments.length) { return _klass; }
-	        _klass = val;
-	        return formFields;
-	    };
+	  inspector.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return inspector;
+	  };
 
+	  inspector.newFeature = function (val) {
+	    if (!arguments.length) return _newFeature;
+	    _newFeature = val;
+	    return inspector;
+	  };
 
-	    return formFields;
+	  return inspector;
 	}
 
-	function uiSectionPresetFields(context) {
+	function uiImproveOsmComments() {
+	  var _qaItem;
 
-	    var section = uiSection('preset-fields', context)
-	        .title(function() {
-	            return _t('inspector.fields');
-	        })
-	        .disclosureContent(renderDisclosureContent);
+	  function issueComments(selection) {
+	    // make the div immediately so it appears above the buttons
+	    var comments = selection.selectAll('.comments-container').data([0]);
+	    comments = comments.enter().append('div').attr('class', 'comments-container').merge(comments); // must retrieve comments from API before they can be displayed
 
-	    var dispatch$1 = dispatch('change', 'revert');
-	    var formFields = uiFormFields(context);
-	    var _state;
-	    var _fieldsArr;
-	    var _presets = [];
-	    var _tags;
-	    var _entityIDs;
+	    services.improveOSM.getComments(_qaItem).then(function (d) {
+	      if (!d.comments) return; // nothing to do here
 
-	    function renderDisclosureContent(selection) {
-	        if (!_fieldsArr) {
+	      var commentEnter = comments.selectAll('.comment').data(d.comments).enter().append('div').attr('class', 'comment');
+	      commentEnter.append('div').attr('class', 'comment-avatar').call(svgIcon('#iD-icon-avatar', 'comment-avatar-icon'));
+	      var mainEnter = commentEnter.append('div').attr('class', 'comment-main');
+	      var metadataEnter = mainEnter.append('div').attr('class', 'comment-metadata');
+	      metadataEnter.append('div').attr('class', 'comment-author').each(function (d) {
+	        var osm = services.osm;
+	        var selection = select(this);
 
-	            var graph = context.graph();
+	        if (osm && d.username) {
+	          selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.username)).attr('target', '_blank');
+	        }
 
-	            var geometries = Object.keys(_entityIDs.reduce(function(geoms, entityID) {
-	                geoms[graph.entity(entityID).geometry(graph)] = true;
-	                return geoms;
-	            }, {}));
+	        selection.html(function (d) {
+	          return d.username;
+	        });
+	      });
+	      metadataEnter.append('div').attr('class', 'comment-date').html(function (d) {
+	        return _t.html('note.status.commented', {
+	          when: localeDateString(d.timestamp)
+	        });
+	      });
+	      mainEnter.append('div').attr('class', 'comment-text').append('p').html(function (d) {
+	        return d.text;
+	      });
+	    })["catch"](function (err) {
+	      console.log(err); // eslint-disable-line no-console
+	    });
+	  }
 
-	            var presetsManager = _mainPresetIndex;
+	  function localeDateString(s) {
+	    if (!s) return null;
+	    var options = {
+	      day: 'numeric',
+	      month: 'short',
+	      year: 'numeric'
+	    };
+	    var d = new Date(s * 1000); // timestamp is served in seconds, date takes ms
 
-	            var allFields = [];
-	            var allMoreFields = [];
-	            var sharedTotalFields;
+	    if (isNaN(d.getTime())) return null;
+	    return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+	  }
 
-	            _presets.forEach(function(preset) {
-	                var fields = preset.fields();
-	                var moreFields = preset.moreFields();
+	  issueComments.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return issueComments;
+	  };
 
-	                allFields = utilArrayUnion(allFields, fields);
-	                allMoreFields = utilArrayUnion(allMoreFields, moreFields);
+	  return issueComments;
+	}
 
-	                if (!sharedTotalFields) {
-	                    sharedTotalFields = utilArrayUnion(fields, moreFields);
-	                } else {
-	                    sharedTotalFields = sharedTotalFields.filter(function(field) {
-	                        return fields.indexOf(field) !== -1 || moreFields.indexOf(field) !== -1;
-	                    });
-	                }
-	            });
+	function uiImproveOsmDetails(context) {
+	  var _qaItem;
 
-	            var sharedFields = allFields.filter(function(field) {
-	                return sharedTotalFields.indexOf(field) !== -1;
-	            });
-	            var sharedMoreFields = allMoreFields.filter(function(field) {
-	                return sharedTotalFields.indexOf(field) !== -1;
-	            });
+	  function issueDetail(d) {
+	    if (d.desc) return d.desc;
+	    var issueKey = d.issueKey;
+	    d.replacements = d.replacements || {};
+	    d.replacements["default"] = _t.html('inspector.unknown'); // special key `default` works as a fallback string
 
-	            _fieldsArr = [];
+	    return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".description"), d.replacements);
+	  }
 
-	            sharedFields.forEach(function(field) {
-	                if (field.matchAllGeometry(geometries)) {
-	                    _fieldsArr.push(
-	                        uiField(context, field, _entityIDs)
-	                    );
-	                }
-	            });
+	  function improveOsmDetails(selection) {
+	    var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    });
+	    details.exit().remove();
+	    var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // description
 
-	            var singularEntity = _entityIDs.length === 1 && graph.hasEntity(_entityIDs[0]);
-	            if (singularEntity && singularEntity.isHighwayIntersection(graph) && presetsManager.field('restrictions')) {
-	                _fieldsArr.push(
-	                    uiField(context, presetsManager.field('restrictions'), _entityIDs)
-	                );
-	            }
+	    var descriptionEnter = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+	    descriptionEnter.append('h4').html(_t.html('QA.keepRight.detail_description'));
+	    descriptionEnter.append('div').attr('class', 'qa-details-description-text').html(issueDetail); // If there are entity links in the error message..
 
-	            var additionalFields = utilArrayUnion(sharedMoreFields, presetsManager.universal());
-	            additionalFields.sort(function(field1, field2) {
-	                return field1.label().localeCompare(field2.label(), _mainLocalizer.localeCode());
-	            });
+	    var relatedEntities = [];
+	    descriptionEnter.selectAll('.error_entity_link, .error_object_link').attr('href', '#').each(function () {
+	      var link = select(this);
+	      var isObjectLink = link.classed('error_object_link');
+	      var entityID = isObjectLink ? utilEntityRoot(_qaItem.objectType) + _qaItem.objectId : this.textContent;
+	      var entity = context.hasEntity(entityID);
+	      relatedEntities.push(entityID); // Add click handler
 
-	            additionalFields.forEach(function(field) {
-	                if (sharedFields.indexOf(field) === -1 &&
-	                    field.matchAllGeometry(geometries)) {
-	                    _fieldsArr.push(
-	                        uiField(context, field, _entityIDs, { show: false })
-	                    );
-	                }
-	            });
+	      link.on('mouseenter', function () {
+	        utilHighlightEntities([entityID], true, context);
+	      }).on('mouseleave', function () {
+	        utilHighlightEntities([entityID], false, context);
+	      }).on('click', function (d3_event) {
+	        d3_event.preventDefault();
+	        utilHighlightEntities([entityID], false, context);
+	        var osmlayer = context.layers().layer('osm');
 
-	            _fieldsArr.forEach(function(field) {
-	                field
-	                    .on('change', function(t, onInput) {
-	                        dispatch$1.call('change', field, _entityIDs, t, onInput);
-	                    })
-	                    .on('revert', function(keys) {
-	                        dispatch$1.call('revert', field, keys);
-	                    });
+	        if (!osmlayer.enabled()) {
+	          osmlayer.enabled(true);
+	        }
+
+	        context.map().centerZoom(_qaItem.loc, 20);
+
+	        if (entity) {
+	          context.enter(modeSelect(context, [entityID]));
+	        } else {
+	          context.loadEntity(entityID, function (err, result) {
+	            if (err) return;
+	            var entity = result.data.find(function (e) {
+	              return e.id === entityID;
 	            });
+	            if (entity) context.enter(modeSelect(context, [entityID]));
+	          });
 	        }
+	      }); // Replace with friendly name if possible
+	      // (The entity may not yet be loaded into the graph)
 
-	        _fieldsArr.forEach(function(field) {
-	            field
-	                .state(_state)
-	                .tags(_tags);
-	        });
+	      if (entity) {
+	        var name = utilDisplayName(entity); // try to use common name
 
+	        if (!name && !isObjectLink) {
+	          var preset = _mainPresetIndex.match(entity, context.graph());
+	          name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
+	        }
 
-	        selection
-	            .call(formFields
-	                .fieldsArr(_fieldsArr)
-	                .state(_state)
-	                .klass('grouped-items-area')
-	            );
+	        if (name) {
+	          this.innerText = name;
+	        }
+	      }
+	    }); // Don't hide entities related to this error - #5880
 
+	    context.features().forceVisible(relatedEntities);
+	    context.map().pan([0, 0]); // trigger a redraw
+	  }
 
-	        selection.selectAll('.wrap-form-field input')
-	            .on('keydown', function() {
-	                // if user presses enter, and combobox is not active, accept edits..
-	                if (event.keyCode === 13 && context.container().select('.combobox').empty()) {
-	                    context.enter(modeBrowse(context));
-	                }
-	            });
-	    }
+	  improveOsmDetails.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return improveOsmDetails;
+	  };
 
-	    section.presets = function(val) {
-	        if (!arguments.length) { return _presets; }
-	        if (!_presets || !val || !utilArrayIdentical(_presets, val)) {
-	            _presets = val;
-	            _fieldsArr = null;
-	        }
-	        return section;
-	    };
+	  return improveOsmDetails;
+	}
 
-	    section.state = function(val) {
-	        if (!arguments.length) { return _state; }
-	        _state = val;
-	        return section;
-	    };
+	function uiImproveOsmHeader() {
+	  var _qaItem;
 
-	    section.tags = function(val) {
-	        if (!arguments.length) { return _tags; }
-	        _tags = val;
-	        // Don't reset _fieldsArr here.
-	        return section;
-	    };
+	  function issueTitle(d) {
+	    var issueKey = d.issueKey;
+	    d.replacements = d.replacements || {};
+	    d.replacements["default"] = _t.html('inspector.unknown'); // special key `default` works as a fallback string
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        if (!val || !_entityIDs || !utilArrayIdentical(_entityIDs, val)) {
-	            _entityIDs = val;
-	            _fieldsArr = null;
-	        }
-	        return section;
-	    };
+	    return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".title"), d.replacements);
+	  }
+
+	  function improveOsmHeader(selection) {
+	    var header = selection.selectAll('.qa-header').data(_qaItem ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    });
+	    header.exit().remove();
+	    var headerEnter = header.enter().append('div').attr('class', 'qa-header');
+	    var svgEnter = headerEnter.append('div').attr('class', 'qa-header-icon').classed('new', function (d) {
+	      return d.id < 0;
+	    }).append('svg').attr('width', '20px').attr('height', '30px').attr('viewbox', '0 0 20 30').attr('class', function (d) {
+	      return "preset-icon-28 qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
+	    });
+	    svgEnter.append('polygon').attr('fill', 'currentColor').attr('class', 'qaItem-fill').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
+	    svgEnter.append('use').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('transform', 'translate(3.5, 5)').attr('xlink:href', function (d) {
+	      var picon = d.icon;
+
+	      if (!picon) {
+	        return '';
+	      } else {
+	        var isMaki = /^maki-/.test(picon);
+	        return "#".concat(picon).concat(isMaki ? '-11' : '');
+	      }
+	    });
+	    headerEnter.append('div').attr('class', 'qa-header-label').html(issueTitle);
+	  }
 
-	    return utilRebind(section, dispatch$1, 'on');
+	  improveOsmHeader.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return improveOsmHeader;
+	  };
+
+	  return improveOsmHeader;
 	}
 
-	function uiSectionRawMemberEditor(context) {
+	function uiImproveOsmEditor(context) {
+	  var dispatch = dispatch$8('change');
+	  var qaDetails = uiImproveOsmDetails(context);
+	  var qaComments = uiImproveOsmComments();
+	  var qaHeader = uiImproveOsmHeader();
 
-	    var section = uiSection('raw-member-editor', context)
-	        .shouldDisplay(function() {
-	            if (!_entityIDs || _entityIDs.length !== 1) { return false; }
+	  var _qaItem;
 
-	            var entity = context.hasEntity(_entityIDs[0]);
-	            return entity && entity.type === 'relation';
-	        })
-	        .title(function() {
-	            var entity = context.hasEntity(_entityIDs[0]);
-	            if (!entity) { return ''; }
+	  function improveOsmEditor(selection) {
+	    var headerEnter = selection.selectAll('.header').data([0]).enter().append('div').attr('class', 'header fillL');
+	    headerEnter.append('button').attr('class', 'close').on('click', function () {
+	      return context.enter(modeBrowse(context));
+	    }).call(svgIcon('#iD-icon-close'));
+	    headerEnter.append('h3').html(_t.html('QA.improveOSM.title'));
+	    var body = selection.selectAll('.body').data([0]);
+	    body = body.enter().append('div').attr('class', 'body').merge(body);
+	    var editor = body.selectAll('.qa-editor').data([0]);
+	    editor.enter().append('div').attr('class', 'modal-section qa-editor').merge(editor).call(qaHeader.issue(_qaItem)).call(qaDetails.issue(_qaItem)).call(qaComments.issue(_qaItem)).call(improveOsmSaveSection);
+	  }
 
-	            var gt = entity.members.length > _maxMembers ? '>' : '';
-	            var count = gt + entity.members.slice(0, _maxMembers).length;
-	            return _t('inspector.title_count', { title: _t('inspector.members'), count: count });
-	        })
-	        .disclosureContent(renderDisclosureContent);
+	  function improveOsmSaveSection(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-	    var taginfo = services.taginfo;
-	    var _entityIDs;
-	    var _maxMembers = 1000;
+	    var isShown = _qaItem && (isSelected || _qaItem.newComment || _qaItem.comment);
+	    var saveSection = selection.selectAll('.qa-save').data(isShown ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    }); // exit
 
-	    function downloadMember(d) {
-	        event.preventDefault();
+	    saveSection.exit().remove(); // enter
 
-	        // display the loading indicator
-	        select(this.parentNode).classed('tag-reference-loading', true);
-	        context.loadEntity(d.id, function() {
-	            section.reRender();
-	        });
-	    }
+	    var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf');
+	    saveSectionEnter.append('h4').attr('class', '.qa-save-header').html(_t.html('note.newComment'));
+	    saveSectionEnter.append('textarea').attr('class', 'new-comment-input').attr('placeholder', _t('QA.keepRight.comment_placeholder')).attr('maxlength', 1000).property('value', function (d) {
+	      return d.newComment;
+	    }).call(utilNoAuto).on('input', changeInput).on('blur', changeInput); // update
 
-	    function zoomToMember(d) {
-	        event.preventDefault();
+	    saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
 
-	        var entity = context.entity(d.id);
-	        context.map().zoomToEase(entity);
+	    function changeInput() {
+	      var input = select(this);
+	      var val = input.property('value').trim();
 
-	        // highlight the feature in case it wasn't previously on-screen
-	        utilHighlightEntities([d.id], true, context);
+	      if (val === '') {
+	        val = undefined;
+	      } // store the unsaved comment with the issue itself
+
+
+	      _qaItem = _qaItem.update({
+	        newComment: val
+	      });
+	      var qaService = services.improveOSM;
+
+	      if (qaService) {
+	        qaService.replaceItem(_qaItem);
+	      }
+
+	      saveSection.call(qaSaveButtons);
 	    }
+	  }
+
+	  function qaSaveButtons(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
+	    var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
-	    function selectMember(d) {
-	        event.preventDefault();
+	    buttonSection.exit().remove(); // enter
 
-	        // remove the hover-highlight styling
-	        utilHighlightEntities([d.id], false, context);
+	    var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
+	    buttonEnter.append('button').attr('class', 'button comment-button action').html(_t.html('QA.keepRight.save_comment'));
+	    buttonEnter.append('button').attr('class', 'button close-button action');
+	    buttonEnter.append('button').attr('class', 'button ignore-button action'); // update
 
-	        var entity = context.entity(d.id);
-	        var mapExtent = context.map().extent();
-	        if (!entity.intersects(mapExtent, context.graph())) {
-	            // zoom to the entity if its extent is not visible now
-	            context.map().zoomToEase(entity);
-	        }
+	    buttonSection = buttonSection.merge(buttonEnter);
+	    buttonSection.select('.comment-button').attr('disabled', function (d) {
+	      return d.newComment ? null : true;
+	    }).on('click.comment', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	        context.enter(modeSelect(context, [d.id]));
-	    }
+	      var qaService = services.improveOSM;
 
+	      if (qaService) {
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch.call('change', item);
+	        });
+	      }
+	    });
+	    buttonSection.select('.close-button').html(function (d) {
+	      var andComment = d.newComment ? '_comment' : '';
+	      return _t.html("QA.keepRight.close".concat(andComment));
+	    }).on('click.close', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	    function changeRole(d) {
-	        var oldRole = d.role;
-	        var newRole = context.cleanRelationRole(select(this).property('value'));
+	      var qaService = services.improveOSM;
 
-	        if (oldRole !== newRole) {
-	            var member = { id: d.id, type: d.type, role: newRole };
-	            context.perform(
-	                actionChangeMember(d.relation.id, member, d.index),
-	                _t('operations.change_role.annotation')
-	            );
-	        }
-	    }
+	      if (qaService) {
+	        d.newStatus = 'SOLVED';
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch.call('change', item);
+	        });
+	      }
+	    });
+	    buttonSection.select('.ignore-button').html(function (d) {
+	      var andComment = d.newComment ? '_comment' : '';
+	      return _t.html("QA.keepRight.ignore".concat(andComment));
+	    }).on('click.ignore', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
+
+	      var qaService = services.improveOSM;
+
+	      if (qaService) {
+	        d.newStatus = 'INVALID';
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch.call('change', item);
+	        });
+	      }
+	    });
+	  } // NOTE: Don't change method name until UI v3 is merged
 
 
-	    function deleteMember(d) {
+	  improveOsmEditor.error = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return improveOsmEditor;
+	  };
 
-	        // remove the hover-highlight styling
-	        utilHighlightEntities([d.id], false, context);
+	  return utilRebind(improveOsmEditor, dispatch, 'on');
+	}
 
-	        context.perform(
-	            actionDeleteMember(d.relation.id, d.index),
-	            _t('operations.delete_member.annotation')
-	        );
+	function uiKeepRightDetails(context) {
+	  var _qaItem;
 
-	        if (!context.hasEntity(d.relation.id)) {
-	            context.enter(modeBrowse(context));
-	        }
+	  function issueDetail(d) {
+	    var itemType = d.itemType,
+	        parentIssueType = d.parentIssueType;
+	    var unknown = _t.html('inspector.unknown');
+	    var replacements = d.replacements || {};
+	    replacements["default"] = unknown; // special key `default` works as a fallback string
+
+	    var detail = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".description"), replacements);
+
+	    if (detail === unknown) {
+	      detail = _t.html("QA.keepRight.errorTypes.".concat(parentIssueType, ".description"), replacements);
 	    }
 
-	    function renderDisclosureContent(selection) {
+	    return detail;
+	  }
+
+	  function keepRightDetails(selection) {
+	    var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    });
+	    details.exit().remove();
+	    var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // description
 
-	        var entityID = _entityIDs[0];
+	    var descriptionEnter = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+	    descriptionEnter.append('h4').html(_t.html('QA.keepRight.detail_description'));
+	    descriptionEnter.append('div').attr('class', 'qa-details-description-text').html(issueDetail); // If there are entity links in the error message..
 
-	        var memberships = [];
-	        var entity = context.entity(entityID);
-	        entity.members.slice(0, _maxMembers).forEach(function(member, index) {
-	            memberships.push({
-	                index: index,
-	                id: member.id,
-	                type: member.type,
-	                role: member.role,
-	                relation: entity,
-	                member: context.hasEntity(member.id),
-	                domId: utilUniqueDomId(entityID + '-member-' + index)
-	            });
-	        });
+	    var relatedEntities = [];
+	    descriptionEnter.selectAll('.error_entity_link, .error_object_link').attr('href', '#').each(function () {
+	      var link = select(this);
+	      var isObjectLink = link.classed('error_object_link');
+	      var entityID = isObjectLink ? utilEntityRoot(_qaItem.objectType) + _qaItem.objectId : this.textContent;
+	      var entity = context.hasEntity(entityID);
+	      relatedEntities.push(entityID); // Add click handler
 
-	        var list = selection.selectAll('.member-list')
-	            .data([0]);
+	      link.on('mouseenter', function () {
+	        utilHighlightEntities([entityID], true, context);
+	      }).on('mouseleave', function () {
+	        utilHighlightEntities([entityID], false, context);
+	      }).on('click', function (d3_event) {
+	        d3_event.preventDefault();
+	        utilHighlightEntities([entityID], false, context);
+	        var osmlayer = context.layers().layer('osm');
 
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'member-list')
-	            .merge(list);
+	        if (!osmlayer.enabled()) {
+	          osmlayer.enabled(true);
+	        }
 
+	        context.map().centerZoomEase(_qaItem.loc, 20);
 
-	        var items = list.selectAll('li')
-	            .data(memberships, function(d) {
-	                return osmEntity.key(d.relation) + ',' + d.index + ',' +
-	                    (d.member ? osmEntity.key(d.member) : 'incomplete');
+	        if (entity) {
+	          context.enter(modeSelect(context, [entityID]));
+	        } else {
+	          context.loadEntity(entityID, function (err, result) {
+	            if (err) return;
+	            var entity = result.data.find(function (e) {
+	              return e.id === entityID;
 	            });
+	            if (entity) context.enter(modeSelect(context, [entityID]));
+	          });
+	        }
+	      }); // Replace with friendly name if possible
+	      // (The entity may not yet be loaded into the graph)
 
-	        items.exit()
-	            .each(unbind)
-	            .remove();
-
-	        var itemsEnter = items.enter()
-	            .append('li')
-	            .attr('class', 'member-row form-field')
-	            .classed('member-incomplete', function(d) { return !d.member; });
-
-	        itemsEnter
-	            .each(function(d) {
-	                var item = select(this);
-
-	                var label = item
-	                    .append('label')
-	                    .attr('class', 'field-label')
-	                    .attr('for', d.domId);
-
-	                if (d.member) {
-	                    // highlight the member feature in the map while hovering on the list item
-	                    item
-	                        .on('mouseover', function() {
-	                            utilHighlightEntities([d.id], true, context);
-	                        })
-	                        .on('mouseout', function() {
-	                            utilHighlightEntities([d.id], false, context);
-	                        });
-
-	                    var labelLink = label
-	                        .append('span')
-	                        .attr('class', 'label-text')
-	                        .append('a')
-	                        .attr('href', '#')
-	                        .on('click', selectMember);
-
-	                    labelLink
-	                        .append('span')
-	                        .attr('class', 'member-entity-type')
-	                        .text(function(d) {
-	                            var matched = _mainPresetIndex.match(d.member, context.graph());
-	                            return (matched && matched.name()) || utilDisplayType(d.member.id);
-	                        });
-
-	                    labelLink
-	                        .append('span')
-	                        .attr('class', 'member-entity-name')
-	                        .text(function(d) { return utilDisplayName(d.member); });
-
-	                    label
-	                        .append('button')
-	                        .attr('tabindex', -1)
-	                        .attr('title', _t('icons.remove'))
-	                        .attr('class', 'remove member-delete')
-	                        .call(svgIcon('#iD-operation-delete'));
-
-	                    label
-	                        .append('button')
-	                        .attr('class', 'member-zoom')
-	                        .attr('title', _t('icons.zoom_to'))
-	                        .call(svgIcon('#iD-icon-framed-dot', 'monochrome'))
-	                        .on('click', zoomToMember);
+	      if (entity) {
+	        var name = utilDisplayName(entity); // try to use common name
 
-	                } else {
-	                    var labelText = label
-	                        .append('span')
-	                        .attr('class', 'label-text');
-
-	                    labelText
-	                        .append('span')
-	                        .attr('class', 'member-entity-type')
-	                        .text(_t('inspector.' + d.type, { id: d.id }));
-
-	                    labelText
-	                        .append('span')
-	                        .attr('class', 'member-entity-name')
-	                        .text(_t('inspector.incomplete', { id: d.id }));
-
-	                    label
-	                        .append('button')
-	                        .attr('class', 'member-download')
-	                        .attr('title', _t('icons.download'))
-	                        .attr('tabindex', -1)
-	                        .call(svgIcon('#iD-icon-load'))
-	                        .on('click', downloadMember);
-	                }
-	            });
+	        if (!name && !isObjectLink) {
+	          var preset = _mainPresetIndex.match(entity, context.graph());
+	          name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
+	        }
 
-	        var wrapEnter = itemsEnter
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-member');
-
-	        wrapEnter
-	            .append('input')
-	            .attr('class', 'member-role')
-	            .attr('id', function(d) {
-	                return d.domId;
-	            })
-	            .property('type', 'text')
-	            .attr('placeholder', _t('inspector.role'))
-	            .call(utilNoAuto);
-
-	        if (taginfo) {
-	            wrapEnter.each(bindTypeahead);
-	        }
-
-	        // update
-	        items = items
-	            .merge(itemsEnter)
-	            .order();
-
-	        items.select('input.member-role')
-	            .property('value', function(d) { return d.role; })
-	            .on('blur', changeRole)
-	            .on('change', changeRole);
-
-	        items.select('button.member-delete')
-	            .on('click', deleteMember);
-
-	        var dragOrigin, targetIndex;
-
-	        items.call(d3_drag()
-	            .on('start', function() {
-	                dragOrigin = {
-	                    x: event.x,
-	                    y: event.y
-	                };
-	                targetIndex = null;
-	            })
-	            .on('drag', function(d, index) {
-	                var x = event.x - dragOrigin.x,
-	                    y = event.y - dragOrigin.y;
-
-	                if (!select(this).classed('dragging') &&
-	                    // don't display drag until dragging beyond a distance threshold
-	                    Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= 5) { return; }
-
-	                select(this)
-	                    .classed('dragging', true);
-
-	                targetIndex = null;
-
-	                selection.selectAll('li.member-row')
-	                    .style('transform', function(d2, index2) {
-	                        var node = select(this).node();
-	                        if (index === index2) {
-	                            return 'translate(' + x + 'px, ' + y + 'px)';
-	                        } else if (index2 > index && event.y > node.offsetTop) {
-	                            if (targetIndex === null || index2 > targetIndex) {
-	                                targetIndex = index2;
-	                            }
-	                            return 'translateY(-100%)';
-	                        } else if (index2 < index && event.y < node.offsetTop + node.offsetHeight) {
-	                            if (targetIndex === null || index2 < targetIndex) {
-	                                targetIndex = index2;
-	                            }
-	                            return 'translateY(100%)';
-	                        }
-	                        return null;
-	                    });
-	            })
-	            .on('end', function(d, index) {
+	        if (name) {
+	          this.innerText = name;
+	        }
+	      }
+	    }); // Don't hide entities related to this issue - #5880
 
-	                if (!select(this).classed('dragging')) {
-	                    return;
-	                }
+	    context.features().forceVisible(relatedEntities);
+	    context.map().pan([0, 0]); // trigger a redraw
+	  }
 
-	                select(this)
-	                    .classed('dragging', false);
+	  keepRightDetails.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return keepRightDetails;
+	  };
 
-	                selection.selectAll('li.member-row')
-	                    .style('transform', null);
+	  return keepRightDetails;
+	}
 
-	                if (targetIndex !== null) {
-	                    // dragged to a new position, reorder
-	                    context.perform(
-	                        actionMoveMember(d.relation.id, index, targetIndex),
-	                        _t('operations.reorder_members.annotation')
-	                    );
-	                }
-	            })
-	        );
+	function uiKeepRightHeader() {
+	  var _qaItem;
 
+	  function issueTitle(d) {
+	    var itemType = d.itemType,
+	        parentIssueType = d.parentIssueType;
+	    var unknown = _t.html('inspector.unknown');
+	    var replacements = d.replacements || {};
+	    replacements["default"] = unknown; // special key `default` works as a fallback string
 
+	    var title = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".title"), replacements);
 
-	        function bindTypeahead(d) {
-	            var row = select(this);
-	            var role = row.selectAll('input.member-role');
-	            var origValue = role.property('value');
+	    if (title === unknown) {
+	      title = _t.html("QA.keepRight.errorTypes.".concat(parentIssueType, ".title"), replacements);
+	    }
 
-	            function sort(value, data) {
-	                var sameletter = [];
-	                var other = [];
-	                for (var i = 0; i < data.length; i++) {
-	                    if (data[i].value.substring(0, value.length) === value) {
-	                        sameletter.push(data[i]);
-	                    } else {
-	                        other.push(data[i]);
-	                    }
-	                }
-	                return sameletter.concat(other);
-	            }
+	    return title;
+	  }
 
-	            role.call(uiCombobox(context, 'member-role')
-	                .fetcher(function(role, callback) {
-	                    // The `geometry` param is used in the `taginfo.js` interface for
-	                    // filtering results, as a key into the `tag_members_fractions`
-	                    // object.  If we don't know the geometry because the member is
-	                    // not yet downloaded, it's ok to guess based on type.
-	                    var geometry;
-	                    if (d.member) {
-	                        geometry = context.graph().geometry(d.member.id);
-	                    } else if (d.type === 'relation') {
-	                        geometry = 'relation';
-	                    } else if (d.type === 'way') {
-	                        geometry = 'line';
-	                    } else {
-	                        geometry = 'point';
-	                    }
+	  function keepRightHeader(selection) {
+	    var header = selection.selectAll('.qa-header').data(_qaItem ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    });
+	    header.exit().remove();
+	    var headerEnter = header.enter().append('div').attr('class', 'qa-header');
+	    var iconEnter = headerEnter.append('div').attr('class', 'qa-header-icon').classed('new', function (d) {
+	      return d.id < 0;
+	    });
+	    iconEnter.append('div').attr('class', function (d) {
+	      return "preset-icon-28 qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.parentIssueType);
+	    }).call(svgIcon('#iD-icon-bolt', 'qaItem-fill'));
+	    headerEnter.append('div').attr('class', 'qa-header-label').html(issueTitle);
+	  }
 
-	                    var rtype = entity.tags.type;
-	                    taginfo.roles({
-	                        debounce: true,
-	                        rtype: rtype || '',
-	                        geometry: geometry,
-	                        query: role
-	                    }, function(err, data) {
-	                        if (!err) { callback(sort(role, data)); }
-	                    });
-	                })
-	                .on('cancel', function() {
-	                    role.property('value', origValue);
-	                })
-	            );
-	        }
+	  keepRightHeader.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return keepRightHeader;
+	  };
 
+	  return keepRightHeader;
+	}
 
-	        function unbind() {
-	            var row = select(this);
+	function uiViewOnKeepRight() {
+	  var _qaItem;
 
-	            row.selectAll('input.member-role')
-	                .call(uiCombobox.off, context);
-	        }
+	  function viewOnKeepRight(selection) {
+	    var url;
+
+	    if (services.keepRight && _qaItem instanceof QAItem) {
+	      url = services.keepRight.issueURL(_qaItem);
 	    }
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return section;
-	    };
+	    var link = selection.selectAll('.view-on-keepRight').data(url ? [url] : []); // exit
 
+	    link.exit().remove(); // enter
 
-	    return section;
+	    var linkEnter = link.enter().append('a').attr('class', 'view-on-keepRight').attr('target', '_blank').attr('rel', 'noopener') // security measure
+	    .attr('href', function (d) {
+	      return d;
+	    }).call(svgIcon('#iD-icon-out-link', 'inline'));
+	    linkEnter.append('span').html(_t.html('inspector.view_on_keepRight'));
+	  }
+
+	  viewOnKeepRight.what = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return viewOnKeepRight;
+	  };
+
+	  return viewOnKeepRight;
 	}
 
-	function uiSectionRawMembershipEditor(context) {
+	function uiKeepRightEditor(context) {
+	  var dispatch = dispatch$8('change');
+	  var qaDetails = uiKeepRightDetails(context);
+	  var qaHeader = uiKeepRightHeader();
 
-	    var section = uiSection('raw-membership-editor', context)
-	        .shouldDisplay(function() {
-	            return _entityIDs && _entityIDs.length === 1;
-	        })
-	        .title(function() {
-	            var entity = context.hasEntity(_entityIDs[0]);
-	            if (!entity) { return ''; }
-
-	            var parents = context.graph().parentRelations(entity);
-	            var gt = parents.length > _maxMemberships ? '>' : '';
-	            var count = gt + parents.slice(0, _maxMemberships).length;
-	            return _t('inspector.title_count', { title: _t('inspector.relations'), count: count });
-	        })
-	        .disclosureContent(renderDisclosureContent);
-
-	    var taginfo = services.taginfo;
-	    var nearbyCombo = uiCombobox(context, 'parent-relation')
-	        .minItems(1)
-	        .fetcher(fetchNearbyRelations)
-	        .itemsMouseEnter(function(d) {
-	            if (d.relation) { utilHighlightEntities([d.relation.id], true, context); }
-	        })
-	        .itemsMouseLeave(function(d) {
-	            if (d.relation) { utilHighlightEntities([d.relation.id], false, context); }
-	        });
-	    var _inChange = false;
-	    var _entityIDs = [];
-	    var _showBlank;
-	    var _maxMemberships = 1000;
+	  var _qaItem;
+
+	  function keepRightEditor(selection) {
+	    var headerEnter = selection.selectAll('.header').data([0]).enter().append('div').attr('class', 'header fillL');
+	    headerEnter.append('button').attr('class', 'close').on('click', function () {
+	      return context.enter(modeBrowse(context));
+	    }).call(svgIcon('#iD-icon-close'));
+	    headerEnter.append('h3').html(_t.html('QA.keepRight.title'));
+	    var body = selection.selectAll('.body').data([0]);
+	    body = body.enter().append('div').attr('class', 'body').merge(body);
+	    var editor = body.selectAll('.qa-editor').data([0]);
+	    editor.enter().append('div').attr('class', 'modal-section qa-editor').merge(editor).call(qaHeader.issue(_qaItem)).call(qaDetails.issue(_qaItem)).call(keepRightSaveSection);
+	    var footer = selection.selectAll('.footer').data([0]);
+	    footer.enter().append('div').attr('class', 'footer').merge(footer).call(uiViewOnKeepRight().what(_qaItem));
+	  }
 
-	    function selectRelation(d) {
-	        event.preventDefault();
+	  function keepRightSaveSection(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-	        // remove the hover-highlight styling
-	        utilHighlightEntities([d.relation.id], false, context);
+	    var isShown = _qaItem && (isSelected || _qaItem.newComment || _qaItem.comment);
+	    var saveSection = selection.selectAll('.qa-save').data(isShown ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    }); // exit
 
-	        context.enter(modeSelect(context, [d.relation.id]));
-	    }
+	    saveSection.exit().remove(); // enter
 
-	    function zoomToRelation(d) {
-	        event.preventDefault();
+	    var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf');
+	    saveSectionEnter.append('h4').attr('class', '.qa-save-header').html(_t.html('QA.keepRight.comment'));
+	    saveSectionEnter.append('textarea').attr('class', 'new-comment-input').attr('placeholder', _t('QA.keepRight.comment_placeholder')).attr('maxlength', 1000).property('value', function (d) {
+	      return d.newComment || d.comment;
+	    }).call(utilNoAuto).on('input', changeInput).on('blur', changeInput); // update
 
-	        var entity = context.entity(d.relation.id);
-	        context.map().zoomToEase(entity);
+	    saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
 
-	        // highlight the relation in case it wasn't previously on-screen
-	        utilHighlightEntities([d.relation.id], true, context);
-	    }
+	    function changeInput() {
+	      var input = select(this);
+	      var val = input.property('value').trim();
+
+	      if (val === _qaItem.comment) {
+	        val = undefined;
+	      } // store the unsaved comment with the issue itself
 
 
-	    function changeRole(d) {
-	        if (d === 0) { return; }    // called on newrow (shouldn't happen)
-	        if (_inChange) { return; }  // avoid accidental recursive call #5731
+	      _qaItem = _qaItem.update({
+	        newComment: val
+	      });
+	      var qaService = services.keepRight;
 
-	        var oldRole = d.member.role;
-	        var newRole = context.cleanRelationRole(select(this).property('value'));
+	      if (qaService) {
+	        qaService.replaceItem(_qaItem); // update keepright cache
+	      }
 
-	        if (oldRole !== newRole) {
-	            _inChange = true;
-	            context.perform(
-	                actionChangeMember(d.relation.id, Object.assign({}, d.member, { role: newRole }), d.index),
-	                _t('operations.change_role.annotation')
-	            );
-	        }
-	        _inChange = false;
+	      saveSection.call(qaSaveButtons);
 	    }
+	  }
 
+	  function qaSaveButtons(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-	    function addMembership(d, role) {
-	        this.blur();           // avoid keeping focus on the button
-	        _showBlank = false;
+	    var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
-	        var member = { id: _entityIDs[0], type: context.entity(_entityIDs[0]).type, role: role };
+	    buttonSection.exit().remove(); // enter
 
-	        if (d.relation) {
-	            context.perform(
-	                actionAddMember(d.relation.id, member),
-	                _t('operations.add_member.annotation')
-	            );
+	    var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
+	    buttonEnter.append('button').attr('class', 'button comment-button action').html(_t.html('QA.keepRight.save_comment'));
+	    buttonEnter.append('button').attr('class', 'button close-button action');
+	    buttonEnter.append('button').attr('class', 'button ignore-button action'); // update
 
-	        } else {
-	            var relation = osmRelation();
-	            context.perform(
-	                actionAddEntity(relation),
-	                actionAddMember(relation.id, member),
-	                _t('operations.add.annotation.relation')
-	            );
+	    buttonSection = buttonSection.merge(buttonEnter);
+	    buttonSection.select('.comment-button') // select and propagate data
+	    .attr('disabled', function (d) {
+	      return d.newComment ? null : true;
+	    }).on('click.comment', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	            context.enter(modeSelect(context, [relation.id]).newFeature(true));
-	        }
-	    }
+	      var qaService = services.keepRight;
 
+	      if (qaService) {
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch.call('change', item);
+	        });
+	      }
+	    });
+	    buttonSection.select('.close-button') // select and propagate data
+	    .html(function (d) {
+	      var andComment = d.newComment ? '_comment' : '';
+	      return _t.html("QA.keepRight.close".concat(andComment));
+	    }).on('click.close', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	    function deleteMembership(d) {
-	        this.blur();           // avoid keeping focus on the button
-	        if (d === 0) { return; }   // called on newrow (shouldn't happen)
+	      var qaService = services.keepRight;
 
-	        // remove the hover-highlight styling
-	        utilHighlightEntities([d.relation.id], false, context);
+	      if (qaService) {
+	        d.newStatus = 'ignore_t'; // ignore temporarily (item fixed)
 
-	        context.perform(
-	            actionDeleteMember(d.relation.id, d.index),
-	            _t('operations.delete_member.annotation')
-	        );
-	    }
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch.call('change', item);
+	        });
+	      }
+	    });
+	    buttonSection.select('.ignore-button') // select and propagate data
+	    .html(function (d) {
+	      var andComment = d.newComment ? '_comment' : '';
+	      return _t.html("QA.keepRight.ignore".concat(andComment));
+	    }).on('click.ignore', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
 
+	      var qaService = services.keepRight;
 
-	    function fetchNearbyRelations(q, callback) {
-	        var newRelation = { relation: null, value: _t('inspector.new_relation') };
+	      if (qaService) {
+	        d.newStatus = 'ignore'; // ignore permanently (false positive)
 
-	        var entityID = _entityIDs[0];
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch.call('change', item);
+	        });
+	      }
+	    });
+	  } // NOTE: Don't change method name until UI v3 is merged
 
-	        var result = [];
 
-	        var graph = context.graph();
+	  keepRightEditor.error = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return keepRightEditor;
+	  };
 
-	        function baseDisplayLabel(entity) {
-	            var matched = _mainPresetIndex.match(entity, graph);
-	            var presetName = (matched && matched.name()) || _t('inspector.relation');
-	            var entityName = utilDisplayName(entity) || '';
+	  return utilRebind(keepRightEditor, dispatch, 'on');
+	}
 
-	            return presetName + ' ' + entityName;
-	        }
+	function uiOsmoseDetails(context) {
+	  var _qaItem;
 
-	        var explicitRelation = q && context.hasEntity(q.toLowerCase());
-	        if (explicitRelation && explicitRelation.type === 'relation' && explicitRelation.id !== entityID) {
-	            // loaded relation is specified explicitly, only show that
+	  function issueString(d, type) {
+	    if (!d) return ''; // Issue strings are cached from Osmose API
 
-	            result.push({
-	                relation: explicitRelation,
-	                value: baseDisplayLabel(explicitRelation) + ' ' + explicitRelation.id
-	            });
-	        } else {
+	    var s = services.osmose.getStrings(d.itemType);
+	    return type in s ? s[type] : '';
+	  }
 
-	            context.history().intersects(context.map().extent()).forEach(function(entity) {
-	                if (entity.type !== 'relation' || entity.id === entityID) { return; }
+	  function osmoseDetails(selection) {
+	    var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    });
+	    details.exit().remove();
+	    var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // Description
 
-	                var value = baseDisplayLabel(entity);
-	                if (q && (value + ' ' + entity.id).toLowerCase().indexOf(q.toLowerCase()) === -1) { return; }
+	    if (issueString(_qaItem, 'detail')) {
+	      var div = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+	      div.append('h4').html(_t.html('QA.keepRight.detail_description'));
+	      div.append('p').attr('class', 'qa-details-description-text').html(function (d) {
+	        return issueString(d, 'detail');
+	      }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
+	    } // Elements (populated later as data is requested)
 
-	                result.push({ relation: entity, value: value });
-	            });
 
-	            result.sort(function(a, b) {
-	                return osmRelation.creationOrder(a.relation, b.relation);
-	            });
+	    var detailsDiv = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+	    var elemsDiv = detailsEnter.append('div').attr('class', 'qa-details-subsection'); // Suggested Fix (mustn't exist for every issue type)
 
-	            // Dedupe identical names by appending relation id - see #2891
-	            var dupeGroups = Object.values(utilArrayGroupBy(result, 'value'))
-	                .filter(function(v) { return v.length > 1; });
+	    if (issueString(_qaItem, 'fix')) {
+	      var _div = detailsEnter.append('div').attr('class', 'qa-details-subsection');
 
-	            dupeGroups.forEach(function(group) {
-	                group.forEach(function(obj) {
-	                    obj.value += ' ' + obj.relation.id;
-	                });
-	            });
-	        }
+	      _div.append('h4').html(_t.html('QA.osmose.fix_title'));
 
-	        result.forEach(function(obj) {
-	            obj.title = obj.value;
-	        });
+	      _div.append('p').html(function (d) {
+	        return issueString(d, 'fix');
+	      }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
+	    } // Common Pitfalls (mustn't exist for every issue type)
 
-	        result.unshift(newRelation);
-	        callback(result);
-	    }
 
-	    function renderDisclosureContent(selection) {
+	    if (issueString(_qaItem, 'trap')) {
+	      var _div2 = detailsEnter.append('div').attr('class', 'qa-details-subsection');
 
-	        var entityID = _entityIDs[0];
+	      _div2.append('h4').html(_t.html('QA.osmose.trap_title'));
 
-	        var entity = context.entity(entityID);
-	        var parents = context.graph().parentRelations(entity);
+	      _div2.append('p').html(function (d) {
+	        return issueString(d, 'trap');
+	      }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
+	    } // Save current item to check if UI changed by time request resolves
 
-	        var memberships = [];
 
-	        parents.slice(0, _maxMemberships).forEach(function(relation) {
-	            relation.members.forEach(function(member, index) {
-	                if (member.id === entity.id) {
-	                    memberships.push({
-	                        relation: relation,
-	                        member: member,
-	                        index: index,
-	                        domId: utilUniqueDomId(entityID + '-membership-' + relation.id + '-' + index)
-	                    });
-	                }
-	            });
-	        });
+	    var thisItem = _qaItem;
+	    services.osmose.loadIssueDetail(_qaItem).then(function (d) {
+	      // No details to add if there are no associated issue elements
+	      if (!d.elems || d.elems.length === 0) return; // Do nothing if UI has moved on by the time this resolves
 
-	        var list = selection.selectAll('.member-list')
-	            .data([0]);
+	      if (context.selectedErrorID() !== thisItem.id && context.container().selectAll(".qaItem.osmose.hover.itemId-".concat(thisItem.id)).empty()) return; // Things like keys and values are dynamically added to a subtitle string
 
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'member-list')
-	            .merge(list);
+	      if (d.detail) {
+	        detailsDiv.append('h4').html(_t.html('QA.osmose.detail_title'));
+	        detailsDiv.append('p').html(function (d) {
+	          return d.detail;
+	        }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
+	      } // Create list of linked issue elements
 
 
-	        var items = list.selectAll('li.member-row-normal')
-	            .data(memberships, function(d) {
-	                return osmEntity.key(d.relation) + ',' + d.index;
-	            });
+	      elemsDiv.append('h4').html(_t.html('QA.osmose.elems_title'));
+	      elemsDiv.append('ul').selectAll('li').data(d.elems).enter().append('li').append('a').attr('href', '#').attr('class', 'error_entity_link').html(function (d) {
+	        return d;
+	      }).each(function () {
+	        var link = select(this);
+	        var entityID = this.textContent;
+	        var entity = context.hasEntity(entityID); // Add click handler
+
+	        link.on('mouseenter', function () {
+	          utilHighlightEntities([entityID], true, context);
+	        }).on('mouseleave', function () {
+	          utilHighlightEntities([entityID], false, context);
+	        }).on('click', function (d3_event) {
+	          d3_event.preventDefault();
+	          utilHighlightEntities([entityID], false, context);
+	          var osmlayer = context.layers().layer('osm');
+
+	          if (!osmlayer.enabled()) {
+	            osmlayer.enabled(true);
+	          }
 
-	        items.exit()
-	            .each(unbind)
-	            .remove();
-
-	        // Enter
-	        var itemsEnter = items.enter()
-	            .append('li')
-	            .attr('class', 'member-row member-row-normal form-field');
-
-	        // highlight the relation in the map while hovering on the list item
-	        itemsEnter.on('mouseover', function(d) {
-	                utilHighlightEntities([d.relation.id], true, context);
-	            })
-	            .on('mouseout', function(d) {
-	                utilHighlightEntities([d.relation.id], false, context);
-	            });
+	          context.map().centerZoom(d.loc, 20);
 
-	        var labelEnter = itemsEnter
-	            .append('label')
-	            .attr('class', 'field-label')
-	            .attr('for', function(d) {
-	                return d.domId;
+	          if (entity) {
+	            context.enter(modeSelect(context, [entityID]));
+	          } else {
+	            context.loadEntity(entityID, function (err, result) {
+	              if (err) return;
+	              var entity = result.data.find(function (e) {
+	                return e.id === entityID;
+	              });
+	              if (entity) context.enter(modeSelect(context, [entityID]));
 	            });
+	          }
+	        }); // Replace with friendly name if possible
+	        // (The entity may not yet be loaded into the graph)
 
-	        var labelLink = labelEnter
-	            .append('span')
-	            .attr('class', 'label-text')
-	            .append('a')
-	            .attr('href', '#')
-	            .on('click', selectRelation);
-
-	        labelLink
-	            .append('span')
-	            .attr('class', 'member-entity-type')
-	            .text(function(d) {
-	                var matched = _mainPresetIndex.match(d.relation, context.graph());
-	                return (matched && matched.name()) || _t('inspector.relation');
-	            });
+	        if (entity) {
+	          var name = utilDisplayName(entity); // try to use common name
 
-	        labelLink
-	            .append('span')
-	            .attr('class', 'member-entity-name')
-	            .text(function(d) { return utilDisplayName(d.relation); });
-
-	        labelEnter
-	            .append('button')
-	            .attr('tabindex', -1)
-	            .attr('class', 'remove member-delete')
-	            .call(svgIcon('#iD-operation-delete'))
-	            .on('click', deleteMembership);
-
-	        labelEnter
-	            .append('button')
-	            .attr('class', 'member-zoom')
-	            .attr('title', _t('icons.zoom_to'))
-	            .call(svgIcon('#iD-icon-framed-dot', 'monochrome'))
-	            .on('click', zoomToRelation);
-
-	        var wrapEnter = itemsEnter
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-member');
-
-	        wrapEnter
-	            .append('input')
-	            .attr('class', 'member-role')
-	            .attr('id', function(d) {
-	                return d.domId;
-	            })
-	            .property('type', 'text')
-	            .attr('placeholder', _t('inspector.role'))
-	            .call(utilNoAuto)
-	            .property('value', function(d) { return d.member.role; })
-	            .on('blur', changeRole)
-	            .on('change', changeRole);
-
-	        if (taginfo) {
-	            wrapEnter.each(bindTypeahead);
-	        }
-
-
-	        var newMembership = list.selectAll('.member-row-new')
-	            .data(_showBlank ? [0] : []);
-
-	        // Exit
-	        newMembership.exit()
-	            .remove();
-
-	        // Enter
-	        var newMembershipEnter = newMembership.enter()
-	            .append('li')
-	            .attr('class', 'member-row member-row-new form-field');
-
-	        var newLabelEnter = newMembershipEnter
-	            .append('label')
-	            .attr('class', 'field-label');
-
-	        newLabelEnter
-	            .append('input')
-	            .attr('placeholder', _t('inspector.choose_relation'))
-	            .attr('type', 'text')
-	            .attr('class', 'member-entity-input')
-	            .call(utilNoAuto);
-
-	        newLabelEnter
-	            .append('button')
-	            .attr('tabindex', -1)
-	            .attr('class', 'remove member-delete')
-	            .call(svgIcon('#iD-operation-delete'))
-	            .on('click', function() {
-	                list.selectAll('.member-row-new')
-	                    .remove();
-	            });
+	          if (!name) {
+	            var preset = _mainPresetIndex.match(entity, context.graph());
+	            name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
+	          }
 
-	        var newWrapEnter = newMembershipEnter
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-member');
+	          if (name) {
+	            this.innerText = name;
+	          }
+	        }
+	      }); // Don't hide entities related to this issue - #5880
 
-	        newWrapEnter
-	            .append('input')
-	            .attr('class', 'member-role')
-	            .property('type', 'text')
-	            .attr('placeholder', _t('inspector.role'))
-	            .call(utilNoAuto);
+	      context.features().forceVisible(d.elems);
+	      context.map().pan([0, 0]); // trigger a redraw
+	    })["catch"](function (err) {
+	      console.log(err); // eslint-disable-line no-console
+	    });
+	  }
 
-	        // Update
-	        newMembership = newMembership
-	            .merge(newMembershipEnter);
+	  osmoseDetails.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return osmoseDetails;
+	  };
 
-	        newMembership.selectAll('.member-entity-input')
-	            .on('blur', cancelEntity)   // if it wasn't accepted normally, cancel it
-	            .call(nearbyCombo
-	                .on('accept', acceptEntity)
-	                .on('cancel', cancelEntity)
-	            );
+	  return osmoseDetails;
+	}
 
+	function uiOsmoseHeader() {
+	  var _qaItem;
 
-	        // Container for the Add button
-	        var addRow = selection.selectAll('.add-row')
-	            .data([0]);
+	  function issueTitle(d) {
+	    var unknown = _t('inspector.unknown');
+	    if (!d) return unknown; // Issue titles supplied by Osmose
 
-	        // enter
-	        var addRowEnter = addRow.enter()
-	            .append('div')
-	            .attr('class', 'add-row');
+	    var s = services.osmose.getStrings(d.itemType);
+	    return 'title' in s ? s.title : unknown;
+	  }
 
-	        var addRelationButton = addRowEnter
-	            .append('button')
-	            .attr('class', 'add-relation');
+	  function osmoseHeader(selection) {
+	    var header = selection.selectAll('.qa-header').data(_qaItem ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    });
+	    header.exit().remove();
+	    var headerEnter = header.enter().append('div').attr('class', 'qa-header');
+	    var svgEnter = headerEnter.append('div').attr('class', 'qa-header-icon').classed('new', function (d) {
+	      return d.id < 0;
+	    }).append('svg').attr('width', '20px').attr('height', '30px').attr('viewbox', '0 0 20 30').attr('class', function (d) {
+	      return "preset-icon-28 qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
+	    });
+	    svgEnter.append('polygon').attr('fill', function (d) {
+	      return services.osmose.getColor(d.item);
+	    }).attr('class', 'qaItem-fill').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
+	    svgEnter.append('use').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('transform', 'translate(3.5, 5)').attr('xlink:href', function (d) {
+	      var picon = d.icon;
 
-	        addRelationButton
-	            .call(svgIcon('#iD-icon-plus', 'light'));
-	        addRelationButton
-	            .call(uiTooltip().title(_t('inspector.add_to_relation')).placement(_mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left'));
+	      if (!picon) {
+	        return '';
+	      } else {
+	        var isMaki = /^maki-/.test(picon);
+	        return "#".concat(picon).concat(isMaki ? '-11' : '');
+	      }
+	    });
+	    headerEnter.append('div').attr('class', 'qa-header-label').html(issueTitle);
+	  }
 
-	        addRowEnter
-	            .append('div')
-	            .attr('class', 'space-value');   // preserve space
+	  osmoseHeader.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return osmoseHeader;
+	  };
 
-	        addRowEnter
-	            .append('div')
-	            .attr('class', 'space-buttons');  // preserve space
+	  return osmoseHeader;
+	}
 
-	        // update
-	        addRow = addRow
-	            .merge(addRowEnter);
+	function uiViewOnOsmose() {
+	  var _qaItem;
 
-	        addRow.select('.add-relation')
-	            .on('click', function() {
-	                _showBlank = true;
-	                section.reRender();
-	                list.selectAll('.member-entity-input').node().focus();
-	            });
+	  function viewOnOsmose(selection) {
+	    var url;
 
+	    if (services.osmose && _qaItem instanceof QAItem) {
+	      url = services.osmose.itemURL(_qaItem);
+	    }
 
-	        function acceptEntity(d) {
-	            if (!d) {
-	                cancelEntity();
-	                return;
-	            }
-	            // remove hover-higlighting
-	            if (d.relation) { utilHighlightEntities([d.relation.id], false, context); }
+	    var link = selection.selectAll('.view-on-osmose').data(url ? [url] : []); // exit
 
-	            var role = context.cleanRelationRole(list.selectAll('.member-row-new .member-role').property('value'));
-	            addMembership(d, role);
-	        }
+	    link.exit().remove(); // enter
 
+	    var linkEnter = link.enter().append('a').attr('class', 'view-on-osmose').attr('target', '_blank').attr('rel', 'noopener') // security measure
+	    .attr('href', function (d) {
+	      return d;
+	    }).call(svgIcon('#iD-icon-out-link', 'inline'));
+	    linkEnter.append('span').html(_t.html('inspector.view_on_osmose'));
+	  }
 
-	        function cancelEntity() {
-	            var input = newMembership.selectAll('.member-entity-input');
-	            input.property('value', '');
+	  viewOnOsmose.what = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return viewOnOsmose;
+	  };
 
-	            // remove hover-higlighting
-	            context.surface().selectAll('.highlighted')
-	                .classed('highlighted', false);
-	        }
+	  return viewOnOsmose;
+	}
 
+	function uiOsmoseEditor(context) {
+	  var dispatch = dispatch$8('change');
+	  var qaDetails = uiOsmoseDetails(context);
+	  var qaHeader = uiOsmoseHeader();
 
-	        function bindTypeahead(d) {
-	            var row = select(this);
-	            var role = row.selectAll('input.member-role');
-	            var origValue = role.property('value');
+	  var _qaItem;
 
-	            function sort(value, data) {
-	                var sameletter = [];
-	                var other = [];
-	                for (var i = 0; i < data.length; i++) {
-	                    if (data[i].value.substring(0, value.length) === value) {
-	                        sameletter.push(data[i]);
-	                    } else {
-	                        other.push(data[i]);
-	                    }
-	                }
-	                return sameletter.concat(other);
-	            }
+	  function osmoseEditor(selection) {
+	    var header = selection.selectAll('.header').data([0]);
+	    var headerEnter = header.enter().append('div').attr('class', 'header fillL');
+	    headerEnter.append('button').attr('class', 'close').on('click', function () {
+	      return context.enter(modeBrowse(context));
+	    }).call(svgIcon('#iD-icon-close'));
+	    headerEnter.append('h3').html(_t.html('QA.osmose.title'));
+	    var body = selection.selectAll('.body').data([0]);
+	    body = body.enter().append('div').attr('class', 'body').merge(body);
+	    var editor = body.selectAll('.qa-editor').data([0]);
+	    editor.enter().append('div').attr('class', 'modal-section qa-editor').merge(editor).call(qaHeader.issue(_qaItem)).call(qaDetails.issue(_qaItem)).call(osmoseSaveSection);
+	    var footer = selection.selectAll('.footer').data([0]);
+	    footer.enter().append('div').attr('class', 'footer').merge(footer).call(uiViewOnOsmose().what(_qaItem));
+	  }
 
-	            role.call(uiCombobox(context, 'member-role')
-	                .fetcher(function(role, callback) {
-	                    var rtype = d.relation.tags.type;
-	                    taginfo.roles({
-	                        debounce: true,
-	                        rtype: rtype || '',
-	                        geometry: context.graph().geometry(entityID),
-	                        query: role
-	                    }, function(err, data) {
-	                        if (!err) { callback(sort(role, data)); }
-	                    });
-	                })
-	                .on('cancel', function() {
-	                    role.property('value', origValue);
-	                })
-	            );
-	        }
+	  function osmoseSaveSection(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
+	    var isShown = _qaItem && isSelected;
+	    var saveSection = selection.selectAll('.qa-save').data(isShown ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    }); // exit
 
-	        function unbind() {
-	            var row = select(this);
+	    saveSection.exit().remove(); // enter
 
-	            row.selectAll('input.member-role')
-	                .call(uiCombobox.off, context);
-	        }
-	    }
+	    var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf'); // update
 
+	    saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
+	  }
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        _showBlank = false;
-	        return section;
-	    };
+	  function qaSaveButtons(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
+	    var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
-	    return section;
-	}
+	    buttonSection.exit().remove(); // enter
 
-	function uiSectionSelectionList(context) {
+	    var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
+	    buttonEnter.append('button').attr('class', 'button close-button action');
+	    buttonEnter.append('button').attr('class', 'button ignore-button action'); // update
 
-	    var _selectedIDs = [];
+	    buttonSection = buttonSection.merge(buttonEnter);
+	    buttonSection.select('.close-button').html(_t.html('QA.keepRight.close')).on('click.close', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	    var section = uiSection('selected-features', context)
-	        .shouldDisplay(function() {
-	            return _selectedIDs.length > 1;
-	        })
-	        .title(function() {
-	            return _t('inspector.title_count', { title: _t('inspector.features'), count: _selectedIDs.length });
-	        })
-	        .disclosureContent(renderDisclosureContent);
+	      var qaService = services.osmose;
 
-	    context.history()
-	        .on('change.selectionList', function(difference) {
-	            if (difference) {
-	                section.reRender();
-	            }
+	      if (qaService) {
+	        d.newStatus = 'done';
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch.call('change', item);
 	        });
+	      }
+	    });
+	    buttonSection.select('.ignore-button').html(_t.html('QA.keepRight.ignore')).on('click.ignore', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _selectedIDs; }
-	        _selectedIDs = val;
-	        return section;
-	    };
-
-	    function selectEntity(entity) {
-	        context.enter(modeSelect(context, [entity.id]));
-	    }
+	      var qaService = services.osmose;
 
-	    function deselectEntity(entity) {
-	        event.stopPropagation();
+	      if (qaService) {
+	        d.newStatus = 'false';
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch.call('change', item);
+	        });
+	      }
+	    });
+	  } // NOTE: Don't change method name until UI v3 is merged
 
-	        var selectedIDs = _selectedIDs.slice();
-	        var index = selectedIDs.indexOf(entity.id);
-	        if (index > -1) {
-	            selectedIDs.splice(index, 1);
-	            context.enter(modeSelect(context, selectedIDs));
-	        }
-	    }
 
-	    function renderDisclosureContent(selection) {
+	  osmoseEditor.error = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return osmoseEditor;
+	  };
 
-	        var list = selection.selectAll('.feature-list')
-	            .data([0]);
+	  return utilRebind(osmoseEditor, dispatch, 'on');
+	}
 
-	        list = list.enter()
-	            .append('div')
-	            .attr('class', 'feature-list')
-	            .merge(list);
+	function uiNoteComments() {
+	  var _note;
+
+	  function noteComments(selection) {
+	    if (_note.isNew()) return; // don't draw .comments-container
+
+	    var comments = selection.selectAll('.comments-container').data([0]);
+	    comments = comments.enter().append('div').attr('class', 'comments-container').merge(comments);
+	    var commentEnter = comments.selectAll('.comment').data(_note.comments).enter().append('div').attr('class', 'comment');
+	    commentEnter.append('div').attr('class', function (d) {
+	      return 'comment-avatar user-' + d.uid;
+	    }).call(svgIcon('#iD-icon-avatar', 'comment-avatar-icon'));
+	    var mainEnter = commentEnter.append('div').attr('class', 'comment-main');
+	    var metadataEnter = mainEnter.append('div').attr('class', 'comment-metadata');
+	    metadataEnter.append('div').attr('class', 'comment-author').each(function (d) {
+	      var selection = select(this);
+	      var osm = services.osm;
 
-	        var entities = _selectedIDs
-	            .map(function(id) { return context.hasEntity(id); })
-	            .filter(Boolean);
+	      if (osm && d.user) {
+	        selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.user)).attr('target', '_blank');
+	      }
 
-	        var items = list.selectAll('.feature-list-item')
-	            .data(entities, osmEntity.key);
+	      selection.html(function (d) {
+	        return d.user || _t.html('note.anonymous');
+	      });
+	    });
+	    metadataEnter.append('div').attr('class', 'comment-date').html(function (d) {
+	      return _t('note.status.' + d.action, {
+	        when: localeDateString(d.date)
+	      });
+	    });
+	    mainEnter.append('div').attr('class', 'comment-text').html(function (d) {
+	      return d.html;
+	    }).selectAll('a').attr('rel', 'noopener nofollow').attr('target', '_blank');
+	    comments.call(replaceAvatars);
+	  }
 
-	        items.exit()
-	            .remove();
+	  function replaceAvatars(selection) {
+	    var showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
+	    var osm = services.osm;
+	    if (showThirdPartyIcons !== 'true' || !osm) return;
+	    var uids = {}; // gather uids in the comment thread
 
-	        // Enter
-	        var enter = items.enter()
-	            .append('div')
-	            .attr('class', 'feature-list-item')
-	            .on('click', selectEntity);
+	    _note.comments.forEach(function (d) {
+	      if (d.uid) uids[d.uid] = true;
+	    });
 
-	        enter
-	            .each(function(d) {
-	                select(this).on('mouseover', function() {
-	                    utilHighlightEntities([d.id], true, context);
-	                });
-	                select(this).on('mouseout', function() {
-	                    utilHighlightEntities([d.id], false, context);
-	                });
-	            });
+	    Object.keys(uids).forEach(function (uid) {
+	      osm.loadUser(uid, function (err, user) {
+	        if (!user || !user.image_url) return;
+	        selection.selectAll('.comment-avatar.user-' + uid).html('').append('img').attr('class', 'icon comment-avatar-icon').attr('src', user.image_url).attr('alt', user.display_name);
+	      });
+	    });
+	  }
 
-	        var label = enter
-	            .append('button')
-	            .attr('class', 'label');
-
-	        enter
-	            .append('button')
-	            .attr('class', 'close')
-	            .attr('title', _t('icons.deselect'))
-	            .on('click', deselectEntity)
-	            .call(svgIcon('#iD-icon-close'));
-
-	        label
-	            .append('span')
-	            .attr('class', 'entity-geom-icon')
-	            .call(svgIcon('', 'pre-text'));
-
-	        label
-	            .append('span')
-	            .attr('class', 'entity-type');
-
-	        label
-	            .append('span')
-	            .attr('class', 'entity-name');
-
-	        // Update
-	        items = items.merge(enter);
-
-	        items.selectAll('.entity-geom-icon use')
-	            .attr('href', function() {
-	                var entity = this.parentNode.parentNode.__data__;
-	                return '#iD-icon-' + entity.geometry(context.graph());
-	            });
+	  function localeDateString(s) {
+	    if (!s) return null;
+	    var options = {
+	      day: 'numeric',
+	      month: 'short',
+	      year: 'numeric'
+	    };
+	    s = s.replace(/-/g, '/'); // fix browser-specific Date() issues
 
-	        items.selectAll('.entity-type')
-	            .text(function(entity) { return _mainPresetIndex.match(entity, context.graph()).name(); });
+	    var d = new Date(s);
+	    if (isNaN(d.getTime())) return null;
+	    return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+	  }
 
-	        items.selectAll('.entity-name')
-	            .text(function(d) {
-	                // fetch latest entity
-	                var entity = context.entity(d.id);
-	                return utilDisplayName(entity);
-	            });
-	    }
+	  noteComments.note = function (val) {
+	    if (!arguments.length) return _note;
+	    _note = val;
+	    return noteComments;
+	  };
 
-	    return section;
+	  return noteComments;
 	}
 
-	function uiEntityEditor(context) {
-	    var dispatch$1 = dispatch('choose');
-	    var _state = 'select';
-	    var _coalesceChanges = false;
-	    var _modified = false;
-	    var _base;
-	    var _entityIDs;
-	    var _activePresets = [];
-	    var _newFeature;
-
-	    var _sections;
+	function uiNoteHeader() {
+	  var _note;
 
-	    function entityEditor(selection) {
+	  function noteHeader(selection) {
+	    var header = selection.selectAll('.note-header').data(_note ? [_note] : [], function (d) {
+	      return d.status + d.id;
+	    });
+	    header.exit().remove();
+	    var headerEnter = header.enter().append('div').attr('class', 'note-header');
+	    var iconEnter = headerEnter.append('div').attr('class', function (d) {
+	      return 'note-header-icon ' + d.status;
+	    }).classed('new', function (d) {
+	      return d.id < 0;
+	    });
+	    iconEnter.append('div').attr('class', 'preset-icon-28').call(svgIcon('#iD-icon-note', 'note-fill'));
+	    iconEnter.each(function (d) {
+	      var statusIcon;
+
+	      if (d.id < 0) {
+	        statusIcon = '#iD-icon-plus';
+	      } else if (d.status === 'open') {
+	        statusIcon = '#iD-icon-close';
+	      } else {
+	        statusIcon = '#iD-icon-apply';
+	      }
 
-	        var combinedTags = utilCombinedTags(_entityIDs, context.graph());
+	      iconEnter.append('div').attr('class', 'note-icon-annotation').call(svgIcon(statusIcon, 'icon-annotation'));
+	    });
+	    headerEnter.append('div').attr('class', 'note-header-label').html(function (d) {
+	      if (_note.isNew()) {
+	        return _t('note.new');
+	      }
 
-	        // Header
-	        var header = selection.selectAll('.header')
-	            .data([0]);
+	      return _t('note.note') + ' ' + d.id + ' ' + (d.status === 'closed' ? _t('note.closed') : '');
+	    });
+	  }
 
-	        // Enter
-	        var headerEnter = header.enter()
-	            .append('div')
-	            .attr('class', 'header fillL cf');
+	  noteHeader.note = function (val) {
+	    if (!arguments.length) return _note;
+	    _note = val;
+	    return noteHeader;
+	  };
 
-	        headerEnter
-	            .append('button')
-	            .attr('class', 'preset-reset preset-choose')
-	            .call(svgIcon((_mainLocalizer.textDirection() === 'rtl') ? '#iD-icon-forward' : '#iD-icon-backward'));
+	  return noteHeader;
+	}
 
-	        headerEnter
-	            .append('button')
-	            .attr('class', 'close')
-	            .on('click', function() { context.enter(modeBrowse(context)); })
-	            .call(svgIcon(_modified ? '#iD-icon-apply' : '#iD-icon-close'));
+	function uiNoteReport() {
+	  var _note;
 
-	        headerEnter
-	            .append('h3');
+	  function noteReport(selection) {
+	    var url;
 
-	        // Update
-	        header = header
-	            .merge(headerEnter);
+	    if (services.osm && _note instanceof osmNote && !_note.isNew()) {
+	      url = services.osm.noteReportURL(_note);
+	    }
 
-	        header.selectAll('h3')
-	            .text(_entityIDs.length === 1 ? _t('inspector.edit') : _t('inspector.edit_features'));
+	    var link = selection.selectAll('.note-report').data(url ? [url] : []); // exit
 
-	        header.selectAll('.preset-reset')
-	            .on('click', function() {
-	                dispatch$1.call('choose', this, _activePresets);
-	            });
+	    link.exit().remove(); // enter
 
-	        // Body
-	        var body = selection.selectAll('.inspector-body')
-	            .data([0]);
+	    var linkEnter = link.enter().append('a').attr('class', 'note-report').attr('target', '_blank').attr('href', function (d) {
+	      return d;
+	    }).call(svgIcon('#iD-icon-out-link', 'inline'));
+	    linkEnter.append('span').html(_t.html('note.report'));
+	  }
 
-	        // Enter
-	        var bodyEnter = body.enter()
-	            .append('div')
-	            .attr('class', 'entity-editor inspector-body sep-top');
-
-	        // Update
-	        body = body
-	            .merge(bodyEnter);
-
-	        if (!_sections) {
-	            _sections = [
-	                uiSectionSelectionList(context),
-	                uiSectionFeatureType(context).on('choose', function(presets) {
-	                    dispatch$1.call('choose', this, presets);
-	                }),
-	                uiSectionEntityIssues(context),
-	                uiSectionPresetFields(context).on('change', changeTags).on('revert', revertTags),
-	                uiSectionRawTagEditor('raw-tag-editor', context).on('change', changeTags),
-	                uiSectionRawMemberEditor(context),
-	                uiSectionRawMembershipEditor(context)
-	            ];
-	        }
-
-	        _sections.forEach(function(section) {
-	            if (section.entityIDs) {
-	                section.entityIDs(_entityIDs);
-	            }
-	            if (section.presets) {
-	                section.presets(_activePresets);
-	            }
-	            if (section.tags) {
-	                section.tags(combinedTags);
-	            }
-	            if (section.state) {
-	                section.state(_state);
-	            }
-	            body.call(section.render);
-	        });
+	  noteReport.note = function (val) {
+	    if (!arguments.length) return _note;
+	    _note = val;
+	    return noteReport;
+	  };
 
-	        body
-	            .selectAll('.key-trap-wrap')
-	            .data([0])
-	            .enter()
-	            .append('div')
-	            .attr('class', 'key-trap-wrap')
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('class', 'key-trap')
-	            .on('keydown.key-trap', function() {
-	                // On tabbing, send focus back to the first field on the inspector-body
-	                // (probably the `name` field) #4159
-	                if (event.keyCode === 9 && !event.shiftKey) {
-	                    event.preventDefault();
-	                    body.select('input').node().focus();
-	                }
-	            });
+	  return noteReport;
+	}
 
-	        context.history()
-	            .on('change.entity-editor', historyChanged);
+	function uiNoteEditor(context) {
+	  var dispatch = dispatch$8('change');
+	  var noteComments = uiNoteComments();
+	  var noteHeader = uiNoteHeader(); // var formFields = uiFormFields(context);
 
-	        function historyChanged(difference) {
-	            if (selection.selectAll('.entity-editor').empty()) { return; }
-	            if (_state === 'hide') { return; }
-	            var significant = !difference ||
-	                    difference.didChange.properties ||
-	                    difference.didChange.addition ||
-	                    difference.didChange.deletion;
-	            if (!significant) { return; }
+	  var _note;
 
-	            _entityIDs = _entityIDs.filter(context.hasEntity);
-	            if (!_entityIDs.length) { return; }
+	  var _newNote; // var _fieldsArr;
 
-	            var priorActivePreset = _activePresets.length === 1 && _activePresets[0];
 
-	            loadActivePresets();
+	  function noteEditor(selection) {
+	    var header = selection.selectAll('.header').data([0]);
+	    var headerEnter = header.enter().append('div').attr('class', 'header fillL');
+	    headerEnter.append('button').attr('class', 'close').on('click', function () {
+	      context.enter(modeBrowse(context));
+	    }).call(svgIcon('#iD-icon-close'));
+	    headerEnter.append('h3').html(_t.html('note.title'));
+	    var body = selection.selectAll('.body').data([0]);
+	    body = body.enter().append('div').attr('class', 'body').merge(body);
+	    var editor = body.selectAll('.note-editor').data([0]);
+	    editor.enter().append('div').attr('class', 'modal-section note-editor').merge(editor).call(noteHeader.note(_note)).call(noteComments.note(_note)).call(noteSaveSection);
+	    var footer = selection.selectAll('.footer').data([0]);
+	    footer.enter().append('div').attr('class', 'footer').merge(footer).call(uiViewOnOSM(context).what(_note)).call(uiNoteReport().note(_note)); // rerender the note editor on any auth change
+
+	    var osm = services.osm;
+
+	    if (osm) {
+	      osm.on('change.note-save', function () {
+	        selection.call(noteEditor);
+	      });
+	    }
+	  }
 
-	            var graph = context.graph();
-	            entityEditor.modified(_base !== graph);
-	            entityEditor(selection);
+	  function noteSaveSection(selection) {
+	    var isSelected = _note && _note.id === context.selectedNoteID();
 
-	            if (priorActivePreset && _activePresets.length === 1 && priorActivePreset !== _activePresets[0]) {
-	                // flash the button to indicate the preset changed
-	                context.container().selectAll('.entity-editor button.preset-reset .label')
-	                    .style('background-color', '#fff')
-	                    .transition()
-	                    .duration(750)
-	                    .style('background-color', null);
-	            }
-	        }
-	    }
+	    var noteSave = selection.selectAll('.note-save').data(isSelected ? [_note] : [], function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
+	    noteSave.exit().remove(); // enter
 
-	    // Tag changes that fire on input can all get coalesced into a single
-	    // history operation when the user leaves the field.  #2342
-	    // Use explicit entityIDs in case the selection changes before the event is fired.
-	    function changeTags(entityIDs, changed, onInput) {
+	    var noteSaveEnter = noteSave.enter().append('div').attr('class', 'note-save save-section cf'); // // if new note, show categories to pick from
+	    // if (_note.isNew()) {
+	    //     var presets = presetManager;
+	    //     // NOTE: this key isn't a age and therefore there is no documentation (yet)
+	    //     _fieldsArr = [
+	    //         uiField(context, presets.field('category'), null, { show: true, revert: false }),
+	    //     ];
+	    //     _fieldsArr.forEach(function(field) {
+	    //         field
+	    //             .on('change', changeCategory);
+	    //     });
+	    //     noteSaveEnter
+	    //         .append('div')
+	    //         .attr('class', 'note-category')
+	    //         .call(formFields.fieldsArr(_fieldsArr));
+	    // }
+	    // function changeCategory() {
+	    //     // NOTE: perhaps there is a better way to get value
+	    //     var val = context.container().select('input[name=\'category\']:checked').property('__data__') || undefined;
+	    //     // store the unsaved category with the note itself
+	    //     _note = _note.update({ newCategory: val });
+	    //     var osm = services.osm;
+	    //     if (osm) {
+	    //         osm.replaceNote(_note);  // update note cache
+	    //     }
+	    //     noteSave
+	    //         .call(noteSaveButtons);
+	    // }
 
-	        var actions = [];
-	        for (var i in entityIDs) {
-	            var entityID = entityIDs[i];
-	            var entity = context.entity(entityID);
+	    noteSaveEnter.append('h4').attr('class', '.note-save-header').html(function () {
+	      return _note.isNew() ? _t('note.newDescription') : _t('note.newComment');
+	    });
+	    var commentTextarea = noteSaveEnter.append('textarea').attr('class', 'new-comment-input').attr('placeholder', _t('note.inputPlaceholder')).attr('maxlength', 1000).property('value', function (d) {
+	      return d.newComment;
+	    }).call(utilNoAuto).on('keydown.note-input', keydown).on('input.note-input', changeInput).on('blur.note-input', changeInput);
 
-	            var tags = Object.assign({}, entity.tags);   // shallow copy
+	    if (!commentTextarea.empty() && _newNote) {
+	      // autofocus the comment field for new notes
+	      commentTextarea.node().focus();
+	    } // update
 
-	            for (var k in changed) {
-	                if (!k) { continue; }
-	                var v = changed[k];
-	                if (v !== undefined || tags.hasOwnProperty(k)) {
-	                    tags[k] = v;
-	                }
-	            }
 
-	            if (!onInput) {
-	                tags = utilCleanTags(tags);
-	            }
+	    noteSave = noteSaveEnter.merge(noteSave).call(userDetails).call(noteSaveButtons); // fast submit if user presses cmd+enter
 
-	            if (!fastDeepEqual(entity.tags, tags)) {
-	                actions.push(actionChangeTags(entityID, tags));
-	            }
+	    function keydown(d3_event) {
+	      if (!(d3_event.keyCode === 13 && // ↩ Return
+	      d3_event.metaKey)) return;
+	      var osm = services.osm;
+	      if (!osm) return;
+	      var hasAuth = osm.authenticated();
+	      if (!hasAuth) return;
+	      if (!_note.newComment) return;
+	      d3_event.preventDefault();
+	      select(this).on('keydown.note-input', null); // focus on button and submit
+
+	      window.setTimeout(function () {
+	        if (_note.isNew()) {
+	          noteSave.selectAll('.save-button').node().focus();
+	          clickSave();
+	        } else {
+	          noteSave.selectAll('.comment-button').node().focus();
+	          clickComment();
 	        }
+	      }, 10);
+	    }
 
-	        if (actions.length) {
-	            var combinedAction = function(graph) {
-	                actions.forEach(function(action) {
-	                    graph = action(graph);
-	                });
-	                return graph;
-	            };
+	    function changeInput() {
+	      var input = select(this);
+	      var val = input.property('value').trim() || undefined; // store the unsaved comment with the note itself
 
-	            var annotation = _t('operations.change_tags.annotation');
+	      _note = _note.update({
+	        newComment: val
+	      });
+	      var osm = services.osm;
 
-	            if (_coalesceChanges) {
-	                context.overwrite(combinedAction, annotation);
-	            } else {
-	                context.perform(combinedAction, annotation);
-	                _coalesceChanges = !!onInput;
-	            }
-	        }
+	      if (osm) {
+	        osm.replaceNote(_note); // update note cache
+	      }
 
-	        // if leaving field (blur event), rerun validation
-	        if (!onInput) {
-	            context.validator().validate();
-	        }
+	      noteSave.call(noteSaveButtons);
 	    }
+	  }
 
-	    function revertTags(keys) {
+	  function userDetails(selection) {
+	    var detailSection = selection.selectAll('.detail-section').data([0]);
+	    detailSection = detailSection.enter().append('div').attr('class', 'detail-section').merge(detailSection);
+	    var osm = services.osm;
+	    if (!osm) return; // Add warning if user is not logged in
 
-	        var actions = [];
-	        for (var i in _entityIDs) {
-	            var entityID = _entityIDs[i];
+	    var hasAuth = osm.authenticated();
+	    var authWarning = detailSection.selectAll('.auth-warning').data(hasAuth ? [] : [0]);
+	    authWarning.exit().transition().duration(200).style('opacity', 0).remove();
+	    var authEnter = authWarning.enter().insert('div', '.tag-reference-body').attr('class', 'field-warning auth-warning').style('opacity', 0);
+	    authEnter.call(svgIcon('#iD-icon-alert', 'inline'));
+	    authEnter.append('span').html(_t.html('note.login'));
+	    authEnter.append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html('login')).on('click.note-login', function (d3_event) {
+	      d3_event.preventDefault();
+	      osm.authenticate();
+	    });
+	    authEnter.transition().duration(200).style('opacity', 1);
+	    var prose = detailSection.selectAll('.note-save-prose').data(hasAuth ? [0] : []);
+	    prose.exit().remove();
+	    prose = prose.enter().append('p').attr('class', 'note-save-prose').html(_t.html('note.upload_explanation')).merge(prose);
+	    osm.userDetails(function (err, user) {
+	      if (err) return;
+	      var userLink = select(document.createElement('div'));
+
+	      if (user.image_url) {
+	        userLink.append('img').attr('src', user.image_url).attr('class', 'icon pre-text user-icon');
+	      }
 
-	            var original = context.graph().base().entities[entityID];
-	            var changed = {};
-	            for (var j in keys) {
-	                var key = keys[j];
-	                changed[key] = original ? original.tags[key] : undefined;
-	            }
+	      userLink.append('a').attr('class', 'user-info').html(user.display_name).attr('href', osm.userURL(user.display_name)).attr('target', '_blank');
+	      prose.html(_t.html('note.upload_explanation_with_user', {
+	        user: userLink.html()
+	      }));
+	    });
+	  }
 
-	            var entity = context.entity(entityID);
-	            var tags = Object.assign({}, entity.tags);   // shallow copy
+	  function noteSaveButtons(selection) {
+	    var osm = services.osm;
+	    var hasAuth = osm && osm.authenticated();
 
-	            for (var k in changed) {
-	                if (!k) { continue; }
-	                var v = changed[k];
-	                if (v !== undefined || tags.hasOwnProperty(k)) {
-	                    tags[k] = v;
-	                }
-	            }
+	    var isSelected = _note && _note.id === context.selectedNoteID();
 
+	    var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_note] : [], function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
-	            tags = utilCleanTags(tags);
+	    buttonSection.exit().remove(); // enter
 
-	            if (!fastDeepEqual(entity.tags, tags)) {
-	                actions.push(actionChangeTags(entityID, tags));
-	            }
+	    var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
 
-	        }
+	    if (_note.isNew()) {
+	      buttonEnter.append('button').attr('class', 'button cancel-button secondary-action').html(_t.html('confirm.cancel'));
+	      buttonEnter.append('button').attr('class', 'button save-button action').html(_t.html('note.save'));
+	    } else {
+	      buttonEnter.append('button').attr('class', 'button status-button action');
+	      buttonEnter.append('button').attr('class', 'button comment-button action').html(_t.html('note.comment'));
+	    } // update
 
-	        if (actions.length) {
-	            var combinedAction = function(graph) {
-	                actions.forEach(function(action) {
-	                    graph = action(graph);
-	                });
-	                return graph;
-	            };
 
-	            var annotation = _t('operations.change_tags.annotation');
+	    buttonSection = buttonSection.merge(buttonEnter);
+	    buttonSection.select('.cancel-button') // select and propagate data
+	    .on('click.cancel', clickCancel);
+	    buttonSection.select('.save-button') // select and propagate data
+	    .attr('disabled', isSaveDisabled).on('click.save', clickSave);
+	    buttonSection.select('.status-button') // select and propagate data
+	    .attr('disabled', hasAuth ? null : true).html(function (d) {
+	      var action = d.status === 'open' ? 'close' : 'open';
+	      var andComment = d.newComment ? '_comment' : '';
+	      return _t('note.' + action + andComment);
+	    }).on('click.status', clickStatus);
+	    buttonSection.select('.comment-button') // select and propagate data
+	    .attr('disabled', isSaveDisabled).on('click.comment', clickComment);
 
-	            if (_coalesceChanges) {
-	                context.overwrite(combinedAction, annotation);
-	            } else {
-	                context.perform(combinedAction, annotation);
-	                _coalesceChanges = false;
-	            }
-	        }
+	    function isSaveDisabled(d) {
+	      return hasAuth && d.status === 'open' && d.newComment ? null : true;
+	    }
+	  }
 
-	        context.validator().validate();
+	  function clickCancel(d3_event, d) {
+	    this.blur(); // avoid keeping focus on the button - #4641
+
+	    var osm = services.osm;
+
+	    if (osm) {
+	      osm.removeNote(d);
 	    }
 
+	    context.enter(modeBrowse(context));
+	    dispatch.call('change');
+	  }
 
-	    entityEditor.modified = function(val) {
-	        if (!arguments.length) { return _modified; }
-	        _modified = val;
-	        return entityEditor;
-	    };
+	  function clickSave(d3_event, d) {
+	    this.blur(); // avoid keeping focus on the button - #4641
 
+	    var osm = services.osm;
 
-	    entityEditor.state = function(val) {
-	        if (!arguments.length) { return _state; }
-	        _state = val;
-	        return entityEditor;
-	    };
+	    if (osm) {
+	      osm.postNoteCreate(d, function (err, note) {
+	        dispatch.call('change', note);
+	      });
+	    }
+	  }
 
+	  function clickStatus(d3_event, d) {
+	    this.blur(); // avoid keeping focus on the button - #4641
 
-	    entityEditor.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        if (val && _entityIDs && utilArrayIdentical(_entityIDs, val)) { return entityEditor; }  // exit early if no change
+	    var osm = services.osm;
 
-	        _entityIDs = val;
-	        _base = context.graph();
-	        _coalesceChanges = false;
+	    if (osm) {
+	      var setStatus = d.status === 'open' ? 'closed' : 'open';
+	      osm.postNoteUpdate(d, setStatus, function (err, note) {
+	        dispatch.call('change', note);
+	      });
+	    }
+	  }
 
-	        loadActivePresets(true);
+	  function clickComment(d3_event, d) {
+	    this.blur(); // avoid keeping focus on the button - #4641
 
-	        return entityEditor
-	            .modified(false);
-	    };
+	    var osm = services.osm;
 
+	    if (osm) {
+	      osm.postNoteUpdate(d, d.status, function (err, note) {
+	        dispatch.call('change', note);
+	      });
+	    }
+	  }
 
-	    entityEditor.newFeature = function(val) {
-	        if (!arguments.length) { return _newFeature; }
-	        _newFeature = val;
-	        return entityEditor;
-	    };
+	  noteEditor.note = function (val) {
+	    if (!arguments.length) return _note;
+	    _note = val;
+	    return noteEditor;
+	  };
 
+	  noteEditor.newNote = function (val) {
+	    if (!arguments.length) return _newNote;
+	    _newNote = val;
+	    return noteEditor;
+	  };
 
-	    function loadActivePresets(isForNewSelection) {
+	  return utilRebind(noteEditor, dispatch, 'on');
+	}
 
-	        var graph = context.graph();
+	function uiSidebar(context) {
+	  var inspector = uiInspector(context);
+	  var dataEditor = uiDataEditor(context);
+	  var noteEditor = uiNoteEditor(context);
+	  var improveOsmEditor = uiImproveOsmEditor(context);
+	  var keepRightEditor = uiKeepRightEditor(context);
+	  var osmoseEditor = uiOsmoseEditor(context);
 
-	        var counts = {};
+	  var _current;
 
-	        for (var i in _entityIDs) {
-	            var entity = graph.hasEntity(_entityIDs[i]);
-	            if (!entity) { return; }
+	  var _wasData = false;
+	  var _wasNote = false;
+	  var _wasQaItem = false; // use pointer events on supported platforms; fallback to mouse events
 
-	            var match = _mainPresetIndex.match(entity, graph);
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	            if (!counts[match.id]) { counts[match.id] = 0; }
-	            counts[match.id] += 1;
+	  function sidebar(selection) {
+	    var container = context.container();
+	    var minWidth = 240;
+	    var sidebarWidth;
+	    var containerWidth;
+	    var dragOffset; // Set the initial width constraints
+
+	    selection.style('min-width', minWidth + 'px').style('max-width', '400px').style('width', '33.3333%');
+	    var resizer = selection.append('div').attr('class', 'sidebar-resizer').on(_pointerPrefix + 'down.sidebar-resizer', pointerdown);
+	    var downPointerId, lastClientX, containerLocGetter;
+
+	    function pointerdown(d3_event) {
+	      if (downPointerId) return;
+	      if ('button' in d3_event && d3_event.button !== 0) return;
+	      downPointerId = d3_event.pointerId || 'mouse';
+	      lastClientX = d3_event.clientX;
+	      containerLocGetter = utilFastMouse(container.node()); // offset from edge of sidebar-resizer
+
+	      dragOffset = utilFastMouse(resizer.node())(d3_event)[0] - 1;
+	      sidebarWidth = selection.node().getBoundingClientRect().width;
+	      containerWidth = container.node().getBoundingClientRect().width;
+	      var widthPct = sidebarWidth / containerWidth * 100;
+	      selection.style('width', widthPct + '%') // lock in current width
+	      .style('max-width', '85%'); // but allow larger widths
+
+	      resizer.classed('dragging', true);
+	      select(window).on('touchmove.sidebar-resizer', function (d3_event) {
+	        // disable page scrolling while resizing on touch input
+	        d3_event.preventDefault();
+	      }, {
+	        passive: false
+	      }).on(_pointerPrefix + 'move.sidebar-resizer', pointermove).on(_pointerPrefix + 'up.sidebar-resizer pointercancel.sidebar-resizer', pointerup);
+	    }
+
+	    function pointermove(d3_event) {
+	      if (downPointerId !== (d3_event.pointerId || 'mouse')) return;
+	      d3_event.preventDefault();
+	      var dx = d3_event.clientX - lastClientX;
+	      lastClientX = d3_event.clientX;
+	      var isRTL = _mainLocalizer.textDirection() === 'rtl';
+	      var scaleX = isRTL ? 0 : 1;
+	      var xMarginProperty = isRTL ? 'margin-right' : 'margin-left';
+	      var x = containerLocGetter(d3_event)[0] - dragOffset;
+	      sidebarWidth = isRTL ? containerWidth - x : x;
+	      var isCollapsed = selection.classed('collapsed');
+	      var shouldCollapse = sidebarWidth < minWidth;
+	      selection.classed('collapsed', shouldCollapse);
+
+	      if (shouldCollapse) {
+	        if (!isCollapsed) {
+	          selection.style(xMarginProperty, '-400px').style('width', '400px');
+	          context.ui().onResize([(sidebarWidth - dx) * scaleX, 0]);
 	        }
+	      } else {
+	        var widthPct = sidebarWidth / containerWidth * 100;
+	        selection.style(xMarginProperty, null).style('width', widthPct + '%');
 
-	        var matches = Object.keys(counts).sort(function(p1, p2) {
-	            return counts[p2] - counts[p1];
-	        }).map(function(pID) {
-	            return _mainPresetIndex.item(pID);
-	        });
-
-	        if (!isForNewSelection) {
-	            // A "weak" preset doesn't set any tags. (e.g. "Address")
-	            var weakPreset = _activePresets.length === 1 &&
-	                !_activePresets[0].isFallback() &&
-	                Object.keys(_activePresets[0].addTags || {}).length === 0;
-	            // Don't replace a weak preset with a fallback preset (e.g. "Point")
-	            if (weakPreset && matches.length === 1 && matches[0].isFallback()) { return; }
+	        if (isCollapsed) {
+	          context.ui().onResize([-sidebarWidth * scaleX, 0]);
+	        } else {
+	          context.ui().onResize([-dx * scaleX, 0]);
 	        }
+	      }
+	    }
 
-	        entityEditor.presets(matches);
+	    function pointerup(d3_event) {
+	      if (downPointerId !== (d3_event.pointerId || 'mouse')) return;
+	      downPointerId = null;
+	      resizer.classed('dragging', false);
+	      select(window).on('touchmove.sidebar-resizer', null).on(_pointerPrefix + 'move.sidebar-resizer', null).on(_pointerPrefix + 'up.sidebar-resizer pointercancel.sidebar-resizer', null);
 	    }
 
-	    entityEditor.presets = function(val) {
-	        if (!arguments.length) { return _activePresets; }
+	    var featureListWrap = selection.append('div').attr('class', 'feature-list-pane').call(uiFeatureList(context));
+	    var inspectorWrap = selection.append('div').attr('class', 'inspector-hidden inspector-wrap');
+
+	    var hoverModeSelect = function hoverModeSelect(targets) {
+	      context.container().selectAll('.feature-list-item button').classed('hover', false);
+
+	      if (context.selectedIDs().length > 1 && targets && targets.length) {
+	        var elements = context.container().selectAll('.feature-list-item button').filter(function (node) {
+	          return targets.indexOf(node) !== -1;
+	        });
 
-	        // don't reload the same preset
-	        if (!utilArrayIdentical(val, _activePresets)) {
-	            _activePresets = val;
+	        if (!elements.empty()) {
+	          elements.classed('hover', true);
 	        }
-	        return entityEditor;
+	      }
 	    };
 
-	    return utilRebind(entityEditor, dispatch$1, 'on');
-	}
+	    sidebar.hoverModeSelect = throttle(hoverModeSelect, 200);
 
-	function uiPresetList(context) {
-	    var dispatch$1 = dispatch('cancel', 'choose');
-	    var _entityIDs;
-	    var _currentPresets;
-	    var _autofocus = false;
+	    function hover(targets) {
+	      var datum = targets && targets.length && targets[0];
 
+	      if (datum && datum.__featurehash__) {
+	        // hovering on data
+	        _wasData = true;
+	        sidebar.show(dataEditor.datum(datum));
+	        selection.selectAll('.sidebar-component').classed('inspector-hover', true);
+	      } else if (datum instanceof osmNote) {
+	        if (context.mode().id === 'drag-note') return;
+	        _wasNote = true;
+	        var osm = services.osm;
 
-	    function presetList(selection) {
-	        if (!_entityIDs) { return; }
+	        if (osm) {
+	          datum = osm.getNote(datum.id); // marker may contain stale data - get latest
+	        }
 
-	        var presets = _mainPresetIndex.matchAllGeometry(entityGeometries());
+	        sidebar.show(noteEditor.note(datum));
+	        selection.selectAll('.sidebar-component').classed('inspector-hover', true);
+	      } else if (datum instanceof QAItem) {
+	        _wasQaItem = true;
+	        var errService = services[datum.service];
 
-	        selection.html('');
+	        if (errService) {
+	          // marker may contain stale data - get latest
+	          datum = errService.getError(datum.id);
+	        } // Currently only three possible services
 
-	        var messagewrap = selection
-	            .append('div')
-	            .attr('class', 'header fillL');
-
-	        var message = messagewrap
-	            .append('h3')
-	            .text(_t('inspector.choose'));
-
-	        messagewrap
-	            .append('button')
-	            .attr('class', 'preset-choose')
-	            .on('click', function() { dispatch$1.call('cancel', this); })
-	            .call(svgIcon((_mainLocalizer.textDirection() === 'rtl') ? '#iD-icon-backward' : '#iD-icon-forward'));
-
-	        function initialKeydown() {
-	            // hack to let delete shortcut work when search is autofocused
-	            if (search.property('value').length === 0 &&
-	                (event.keyCode === utilKeybinding.keyCodes['⌫'] ||
-	                 event.keyCode === utilKeybinding.keyCodes['⌦'])) {
-	                event.preventDefault();
-	                event.stopPropagation();
-	                operationDelete(context, _entityIDs)();
-
-	            // hack to let undo work when search is autofocused
-	            } else if (search.property('value').length === 0 &&
-	                (event.ctrlKey || event.metaKey) &&
-	                event.keyCode === utilKeybinding.keyCodes.z) {
-	                event.preventDefault();
-	                event.stopPropagation();
-	                context.undo();
-	            } else if (!event.ctrlKey && !event.metaKey) {
-	                // don't check for delete/undo hack on future keydown events
-	                select(this).on('keydown', keydown);
-	                keydown.call(this);
-	            }
-	        }
 
-	        function keydown() {
-	            // down arrow
-	            if (event.keyCode === utilKeybinding.keyCodes['↓'] &&
-	                // if insertion point is at the end of the string
-	                search.node().selectionStart === search.property('value').length) {
-	                event.preventDefault();
-	                event.stopPropagation();
-	                // move focus to the first item in the preset list
-	                var buttons = list.selectAll('.preset-list-button');
-	                if (!buttons.empty()) { buttons.nodes()[0].focus(); }
-	            }
-	        }
+	        var errEditor;
 
-	        function keypress() {
-	            // enter
-	            var value = search.property('value');
-	            if (event.keyCode === 13 && value.length) {
-	                list.selectAll('.preset-list-item:first-child')
-	                    .each(function(d) { d.choose.call(this); });
-	            }
+	        if (datum.service === 'keepRight') {
+	          errEditor = keepRightEditor;
+	        } else if (datum.service === 'osmose') {
+	          errEditor = osmoseEditor;
+	        } else {
+	          errEditor = improveOsmEditor;
 	        }
 
-	        function inputevent() {
-	            var value = search.property('value');
-	            list.classed('filtered', value.length);
-	            var extent = combinedEntityExtent();
-	            var results, messageText;
-	            if (value.length && extent) {
-	                var center = extent.center();
-	                var countryCode = iso1A2Code(center);
+	        context.container().selectAll('.qaItem.' + datum.service).classed('hover', function (d) {
+	          return d.id === datum.id;
+	        });
+	        sidebar.show(errEditor.error(datum));
+	        selection.selectAll('.sidebar-component').classed('inspector-hover', true);
+	      } else if (!_current && datum instanceof osmEntity) {
+	        featureListWrap.classed('inspector-hidden', true);
+	        inspectorWrap.classed('inspector-hidden', false).classed('inspector-hover', true);
+
+	        if (!inspector.entityIDs() || !utilArrayIdentical(inspector.entityIDs(), [datum.id]) || inspector.state() !== 'hover') {
+	          inspector.state('hover').entityIDs([datum.id]).newFeature(false);
+	          inspectorWrap.call(inspector);
+	        }
+	      } else if (!_current) {
+	        featureListWrap.classed('inspector-hidden', false);
+	        inspectorWrap.classed('inspector-hidden', true);
+	        inspector.state('hide');
+	      } else if (_wasData || _wasNote || _wasQaItem) {
+	        _wasNote = false;
+	        _wasData = false;
+	        _wasQaItem = false;
+	        context.container().selectAll('.note').classed('hover', false);
+	        context.container().selectAll('.qaItem').classed('hover', false);
+	        sidebar.hide();
+	      }
+	    }
 
-	                results = presets.search(value, entityGeometries()[0], countryCode && countryCode.toLowerCase());
-	                messageText = _t('inspector.results', {
-	                    n: results.collection.length,
-	                    search: value
-	                });
-	            } else {
-	                results = _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro());
-	                messageText = _t('inspector.choose');
-	            }
-	            list.call(drawList, results);
-	            message.text(messageText);
-	        }
+	    sidebar.hover = throttle(hover, 200);
 
-	        var searchWrap = selection
-	            .append('div')
-	            .attr('class', 'search-header');
+	    sidebar.intersects = function (extent) {
+	      var rect = selection.node().getBoundingClientRect();
+	      return extent.intersects([context.projection.invert([0, rect.height]), context.projection.invert([rect.width, 0])]);
+	    };
 
-	        var search = searchWrap
-	            .append('input')
-	            .attr('class', 'preset-search-input')
-	            .attr('placeholder', _t('inspector.search'))
-	            .attr('type', 'search')
-	            .call(utilNoAuto)
-	            .on('keydown', initialKeydown)
-	            .on('keypress', keypress)
-	            .on('input', inputevent);
+	    sidebar.select = function (ids, newFeature) {
+	      sidebar.hide();
 
-	        searchWrap
-	            .call(svgIcon('#iD-icon-search', 'pre-text'));
+	      if (ids && ids.length) {
+	        var entity = ids.length === 1 && context.entity(ids[0]);
 
-	        if (_autofocus) {
-	            search.node().focus();
+	        if (entity && newFeature && selection.classed('collapsed')) {
+	          // uncollapse the sidebar
+	          var extent = entity.extent(context.graph());
+	          sidebar.expand(sidebar.intersects(extent));
 	        }
 
-	        var listWrap = selection
-	            .append('div')
-	            .attr('class', 'inspector-body');
+	        featureListWrap.classed('inspector-hidden', true);
+	        inspectorWrap.classed('inspector-hidden', false).classed('inspector-hover', false); // reload the UI even if the ids are the same since the entities
+	        // themselves may have changed
 
-	        var list = listWrap
-	            .append('div')
-	            .attr('class', 'preset-list')
-	            .call(drawList, _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro()));
+	        inspector.state('select').entityIDs(ids).newFeature(newFeature);
+	        inspectorWrap.call(inspector);
+	      } else {
+	        inspector.state('hide');
+	      }
+	    };
 
-	        context.features().on('change.preset-list', updateForFeatureHiddenState);
-	    }
+	    sidebar.showPresetList = function () {
+	      inspector.showList();
+	    };
 
+	    sidebar.show = function (component, element) {
+	      featureListWrap.classed('inspector-hidden', true);
+	      inspectorWrap.classed('inspector-hidden', true);
+	      if (_current) _current.remove();
+	      _current = selection.append('div').attr('class', 'sidebar-component').call(component, element);
+	    };
 
-	    function drawList(list, presets) {
-	        presets = presets.matchAllGeometry(entityGeometries());
-	        var collection = presets.collection.reduce(function(collection, preset) {
-	            if (!preset) { return collection; }
+	    sidebar.hide = function () {
+	      featureListWrap.classed('inspector-hidden', false);
+	      inspectorWrap.classed('inspector-hidden', true);
+	      if (_current) _current.remove();
+	      _current = null;
+	    };
 
-	            if (preset.members) {
-	                if (preset.members.collection.filter(function(preset) {
-	                    return preset.addable();
-	                }).length > 1) {
-	                    collection.push(CategoryItem(preset));
-	                }
-	            } else if (preset.addable()) {
-	                collection.push(PresetItem(preset));
-	            }
-	            return collection;
-	        }, []);
+	    sidebar.expand = function (moveMap) {
+	      if (selection.classed('collapsed')) {
+	        sidebar.toggle(moveMap);
+	      }
+	    };
 
-	        var items = list.selectAll('.preset-list-item')
-	            .data(collection, function(d) { return d.preset.id; });
+	    sidebar.collapse = function (moveMap) {
+	      if (!selection.classed('collapsed')) {
+	        sidebar.toggle(moveMap);
+	      }
+	    };
 
-	        items.order();
+	    sidebar.toggle = function (moveMap) {
+	      // Don't allow sidebar to toggle when the user is in the walkthrough.
+	      if (context.inIntro()) return;
+	      var isCollapsed = selection.classed('collapsed');
+	      var isCollapsing = !isCollapsed;
+	      var isRTL = _mainLocalizer.textDirection() === 'rtl';
+	      var scaleX = isRTL ? 0 : 1;
+	      var xMarginProperty = isRTL ? 'margin-right' : 'margin-left';
+	      sidebarWidth = selection.node().getBoundingClientRect().width; // switch from % to px
 
-	        items.exit()
-	            .remove();
+	      selection.style('width', sidebarWidth + 'px');
+	      var startMargin, endMargin, lastMargin;
 
-	        items.enter()
-	            .append('div')
-	            .attr('class', function(item) { return 'preset-list-item preset-' + item.preset.id.replace('/', '-'); })
-	            .classed('current', function(item) { return _currentPresets.indexOf(item.preset) !== -1; })
-	            .each(function(item) { select(this).call(item); })
-	            .style('opacity', 0)
-	            .transition()
-	            .style('opacity', 1);
-
-	        updateForFeatureHiddenState();
-	    }
-
-	    function itemKeydown(){
-	        // the actively focused item
-	        var item = select(this.closest('.preset-list-item'));
-	        var parentItem = select(item.node().parentNode.closest('.preset-list-item'));
-
-	        // arrow down, move focus to the next, lower item
-	        if (event.keyCode === utilKeybinding.keyCodes['↓']) {
-	            event.preventDefault();
-	            event.stopPropagation();
-	            // the next item in the list at the same level
-	            var nextItem = select(item.node().nextElementSibling);
-	            // if there is no next item in this list
-	            if (nextItem.empty()) {
-	                // if there is a parent item
-	                if (!parentItem.empty()) {
-	                    // the item is the last item of a sublist,
-	                    // select the next item at the parent level
-	                    nextItem = select(parentItem.node().nextElementSibling);
-	                }
-	            // if the focused item is expanded
-	            } else if (select(this).classed('expanded')) {
-	                // select the first subitem instead
-	                nextItem = item.select('.subgrid .preset-list-item:first-child');
-	            }
-	            if (!nextItem.empty()) {
-	                // focus on the next item
-	                nextItem.select('.preset-list-button').node().focus();
-	            }
+	      if (isCollapsing) {
+	        startMargin = lastMargin = 0;
+	        endMargin = -sidebarWidth;
+	      } else {
+	        startMargin = lastMargin = -sidebarWidth;
+	        endMargin = 0;
+	      }
 
-	        // arrow up, move focus to the previous, higher item
-	        } else if (event.keyCode === utilKeybinding.keyCodes['↑']) {
-	            event.preventDefault();
-	            event.stopPropagation();
-	            // the previous item in the list at the same level
-	            var previousItem = select(item.node().previousElementSibling);
-
-	            // if there is no previous item in this list
-	            if (previousItem.empty()) {
-	                // if there is a parent item
-	                if (!parentItem.empty()) {
-	                    // the item is the first subitem of a sublist select the parent item
-	                    previousItem = parentItem;
-	                }
-	            // if the previous item is expanded
-	            } else if (previousItem.select('.preset-list-button').classed('expanded')) {
-	                // select the last subitem of the sublist of the previous item
-	                previousItem = previousItem.select('.subgrid .preset-list-item:last-child');
-	            }
+	      if (!isCollapsing) {
+	        // unhide the sidebar's content before it transitions onscreen
+	        selection.classed('collapsed', isCollapsing);
+	      }
 
-	            if (!previousItem.empty()) {
-	                // focus on the previous item
-	                previousItem.select('.preset-list-button').node().focus();
-	            } else {
-	                // the focus is at the top of the list, move focus back to the search field
-	                var search = select(this.closest('.preset-list-pane')).select('.preset-search-input');
-	                search.node().focus();
-	            }
+	      selection.transition().style(xMarginProperty, endMargin + 'px').tween('panner', function () {
+	        var i = d3_interpolateNumber(startMargin, endMargin);
+	        return function (t) {
+	          var dx = lastMargin - Math.round(i(t));
+	          lastMargin = lastMargin - dx;
+	          context.ui().onResize(moveMap ? undefined : [dx * scaleX, 0]);
+	        };
+	      }).on('end', function () {
+	        if (isCollapsing) {
+	          // hide the sidebar's content after it transitions offscreen
+	          selection.classed('collapsed', isCollapsing);
+	        } // switch back from px to %
 
-	        // arrow left, move focus to the parent item if there is one
-	        } else if (event.keyCode === utilKeybinding.keyCodes[(_mainLocalizer.textDirection() === 'rtl') ? '→' : '←']) {
-	            event.preventDefault();
-	            event.stopPropagation();
-	            // if there is a parent item, focus on the parent item
-	            if (!parentItem.empty()) {
-	                parentItem.select('.preset-list-button').node().focus();
-	            }
 
-	        // arrow right, choose this item
-	        } else if (event.keyCode === utilKeybinding.keyCodes[(_mainLocalizer.textDirection() === 'rtl') ? '←' : '→']) {
-	            event.preventDefault();
-	            event.stopPropagation();
-	            item.datum().choose.call(select(this).node());
+	        if (!isCollapsing) {
+	          var containerWidth = container.node().getBoundingClientRect().width;
+	          var widthPct = sidebarWidth / containerWidth * 100;
+	          selection.style(xMarginProperty, null).style('width', widthPct + '%');
 	        }
-	    }
-
-
-	    function CategoryItem(preset) {
-	        var box, sublist, shown = false;
+	      });
+	    }; // toggle the sidebar collapse when double-clicking the resizer
 
-	        function item(selection) {
-	            var wrap = selection.append('div')
-	                .attr('class', 'preset-list-button-wrap category');
 
-	            function click() {
-	                var isExpanded = select(this).classed('expanded');
-	                var iconName = isExpanded ?
-	                    (_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward') : '#iD-icon-down';
-	                select(this)
-	                    .classed('expanded', !isExpanded);
-	                select(this).selectAll('div.label-inner svg.icon use')
-	                    .attr('href', iconName);
-	                item.choose();
-	            }
+	    resizer.on('dblclick', function (d3_event) {
+	      d3_event.preventDefault();
 
-	            var geometries = entityGeometries();
+	      if (d3_event.sourceEvent) {
+	        d3_event.sourceEvent.preventDefault();
+	      }
 
-	            var button = wrap
-	                .append('button')
-	                .attr('class', 'preset-list-button')
-	                .classed('expanded', false)
-	                .call(uiPresetIcon()
-	                    .geometry(geometries.length === 1 && geometries[0])
-	                    .preset(preset))
-	                .on('click', click)
-	                .on('keydown', function() {
-	                    // right arrow, expand the focused item
-	                    if (event.keyCode === utilKeybinding.keyCodes[(_mainLocalizer.textDirection() === 'rtl') ? '←' : '→']) {
-	                        event.preventDefault();
-	                        event.stopPropagation();
-	                        // if the item isn't expanded
-	                        if (!select(this).classed('expanded')) {
-	                            // toggle expansion (expand the item)
-	                            click.call(this);
-	                        }
-	                    // left arrow, collapse the focused item
-	                    } else if (event.keyCode === utilKeybinding.keyCodes[(_mainLocalizer.textDirection() === 'rtl') ? '→' : '←']) {
-	                        event.preventDefault();
-	                        event.stopPropagation();
-	                        // if the item is expanded
-	                        if (select(this).classed('expanded')) {
-	                            // toggle expansion (collapse the item)
-	                            click.call(this);
-	                        }
-	                    } else {
-	                        itemKeydown.call(this);
-	                    }
-	                });
+	      sidebar.toggle();
+	    }); // ensure hover sidebar is closed when zooming out beyond editable zoom
 
-	            var label = button
-	                .append('div')
-	                .attr('class', 'label')
-	                .append('div')
-	                .attr('class', 'label-inner');
+	    context.map().on('crossEditableZoom.sidebar', function (within) {
+	      if (!within && !selection.select('.inspector-hover').empty()) {
+	        hover([]);
+	      }
+	    });
+	  }
 
-	            label
-	                .append('div')
-	                .attr('class', 'namepart')
-	                .call(svgIcon((_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward'), 'inline'))
-	                .append('span')
-	                .html(function() { return preset.name() + '&hellip;'; });
+	  sidebar.showPresetList = function () {};
 
-	            box = selection.append('div')
-	                .attr('class', 'subgrid')
-	                .style('max-height', '0px')
-	                .style('opacity', 0);
+	  sidebar.hover = function () {};
 
-	            box.append('div')
-	                .attr('class', 'arrow');
+	  sidebar.hover.cancel = function () {};
 
-	            sublist = box.append('div')
-	                .attr('class', 'preset-list fillL3');
-	        }
+	  sidebar.intersects = function () {};
 
+	  sidebar.select = function () {};
 
-	        item.choose = function() {
-	            if (!box || !sublist) { return; }
+	  sidebar.show = function () {};
 
-	            if (shown) {
-	                shown = false;
-	                box.transition()
-	                    .duration(200)
-	                    .style('opacity', '0')
-	                    .style('max-height', '0px')
-	                    .style('padding-bottom', '0px');
-	            } else {
-	                shown = true;
-	                var members = preset.members.matchAllGeometry(entityGeometries());
-	                sublist.call(drawList, members);
-	                box.transition()
-	                    .duration(200)
-	                    .style('opacity', '1')
-	                    .style('max-height', 200 + members.collection.length * 190 + 'px')
-	                    .style('padding-bottom', '10px');
-	            }
-	        };
+	  sidebar.hide = function () {};
 
-	        item.preset = preset;
-	        return item;
-	    }
+	  sidebar.expand = function () {};
 
+	  sidebar.collapse = function () {};
 
-	    function PresetItem(preset) {
-	        function item(selection) {
-	            var wrap = selection.append('div')
-	                .attr('class', 'preset-list-button-wrap');
+	  sidebar.toggle = function () {};
 
-	            var geometries = entityGeometries();
+	  return sidebar;
+	}
 
-	            var button = wrap.append('button')
-	                .attr('class', 'preset-list-button')
-	                .call(uiPresetIcon()
-	                    .geometry(geometries.length === 1 && geometries[0])
-	                    .preset(preset))
-	                .on('click', item.choose)
-	                .on('keydown', itemKeydown);
+	function uiSourceSwitch(context) {
+	  var keys;
 
-	            var label = button
-	                .append('div')
-	                .attr('class', 'label')
-	                .append('div')
-	                .attr('class', 'label-inner');
+	  function click(d3_event) {
+	    d3_event.preventDefault();
+	    var osm = context.connection();
+	    if (!osm) return;
+	    if (context.inIntro()) return;
+	    if (context.history().hasChanges() && !window.confirm(_t('source_switch.lose_changes'))) return;
+	    var isLive = select(this).classed('live');
+	    isLive = !isLive;
+	    context.enter(modeBrowse(context));
+	    context.history().clearSaved(); // remove saved history
 
-	            // NOTE: split/join on en-dash, not a hyphen (to avoid conflict with fr - nl names in Brussels etc)
-	            label.selectAll('.namepart')
-	                .data(preset.name().split(' – '))
-	                .enter()
-	                .append('div')
-	                .attr('class', 'namepart')
-	                .text(function(d) { return d; });
+	    context.flush(); // remove stored data
 
-	            wrap.call(item.reference.button);
-	            selection.call(item.reference.body);
-	        }
+	    select(this).html(isLive ? _t.html('source_switch.live') : _t.html('source_switch.dev')).classed('live', isLive).classed('chip', isLive);
+	    osm["switch"](isLive ? keys[0] : keys[1]); // switch connection (warning: dispatches 'change' event)
+	  }
 
-	        item.choose = function() {
-	            if (select(this).classed('disabled')) { return; }
-	            if (!context.inIntro()) {
-	                _mainPresetIndex.setMostRecent(preset, entityGeometries()[0]);
-	            }
-	            context.perform(
-	                function(graph) {
-	                    for (var i in _entityIDs) {
-	                        var entityID = _entityIDs[i];
-	                        var oldPreset = _mainPresetIndex.match(graph.entity(entityID), graph);
-	                        graph = actionChangePreset(entityID, oldPreset, preset)(graph);
-	                    }
-	                    return graph;
-	                },
-	                _t('operations.change_tags.annotation')
-	            );
+	  var sourceSwitch = function sourceSwitch(selection) {
+	    selection.append('a').attr('href', '#').html(_t.html('source_switch.live')).attr('class', 'live chip').on('click', click);
+	  };
 
-	            context.validator().validate();  // rerun validation
-	            dispatch$1.call('choose', this, preset);
-	        };
+	  sourceSwitch.keys = function (_) {
+	    if (!arguments.length) return keys;
+	    keys = _;
+	    return sourceSwitch;
+	  };
 
-	        item.help = function() {
-	            event.stopPropagation();
-	            item.reference.toggle();
-	        };
+	  return sourceSwitch;
+	}
 
-	        item.preset = preset;
-	        item.reference = uiTagReference(preset.reference());
+	function uiSpinner(context) {
+	  var osm = context.connection();
+	  return function (selection) {
+	    var img = selection.append('img').attr('src', context.imagePath('loader-black.gif')).style('opacity', 0);
 
-	        return item;
+	    if (osm) {
+	      osm.on('loading.spinner', function () {
+	        img.transition().style('opacity', 1);
+	      }).on('loaded.spinner', function () {
+	        img.transition().style('opacity', 0);
+	      });
 	    }
+	  };
+	}
 
+	function uiSplash(context) {
+	  return function (selection) {
+	    // Exception - if there are restorable changes, skip this splash screen.
+	    // This is because we currently only support one `uiModal` at a time
+	    //  and we need to show them `uiRestore`` instead of this one.
+	    if (context.history().hasRestorableChanges()) return; // If user has not seen this version of the privacy policy, show the splash again.
 
-	    function updateForFeatureHiddenState() {
-	        if (!_entityIDs.every(context.hasEntity)) { return; }
-
-	        var geometries = entityGeometries();
-	        var button = context.container().selectAll('.preset-list .preset-list-button');
-
-	        // remove existing tooltips
-	        button.call(uiTooltip().destroyAny);
+	    var updateMessage = '';
+	    var sawPrivacyVersion = corePreferences('sawPrivacyVersion');
+	    var showSplash = !corePreferences('sawSplash');
 
-	        button.each(function(item, index) {
-	            var hiddenPresetFeaturesId;
-	            for (var i in geometries) {
-	                hiddenPresetFeaturesId = context.features().isHiddenPreset(item.preset, geometries[i]);
-	                if (hiddenPresetFeaturesId) { break; }
-	            }
-	            var isHiddenPreset = !context.inIntro() &&
-	                !!hiddenPresetFeaturesId &&
-	                (_currentPresets.length !== 1 || item.preset !== _currentPresets[0]);
-
-	            select(this)
-	                .classed('disabled', isHiddenPreset);
-
-	            if (isHiddenPreset) {
-	                var isAutoHidden = context.features().autoHidden(hiddenPresetFeaturesId);
-	                var tooltipIdSuffix = isAutoHidden ? 'zoom' : 'manual';
-	                var tooltipObj = { features: _t('feature.' + hiddenPresetFeaturesId + '.description') };
-	                select(this).call(uiTooltip()
-	                    .title(_t('inspector.hidden_preset.' + tooltipIdSuffix, tooltipObj))
-	                    .placement(index < 2 ? 'bottom' : 'top')
-	                );
-	            }
-	        });
+	    if (sawPrivacyVersion !== context.privacyVersion) {
+	      updateMessage = _t('splash.privacy_update');
+	      showSplash = true;
 	    }
 
-	    presetList.autofocus = function(val) {
-	        if (!arguments.length) { return _autofocus; }
-	        _autofocus = val;
-	        return presetList;
-	    };
+	    if (!showSplash) return;
+	    corePreferences('sawSplash', true);
+	    corePreferences('sawPrivacyVersion', context.privacyVersion); // fetch intro graph data now, while user is looking at the splash screen
 
-	    presetList.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        if (_entityIDs && _entityIDs.length) {
-	            var presets = _entityIDs.map(function(entityID) {
-	                return _mainPresetIndex.match(context.entity(entityID), context.graph());
-	            });
-	            presetList.presets(presets);
-	        }
-	        return presetList;
-	    };
+	    _mainFileFetcher.get('intro_graph');
+	    var modalSelection = uiModal(selection);
+	    modalSelection.select('.modal').attr('class', 'modal-splash modal');
+	    var introModal = modalSelection.select('.content').append('div').attr('class', 'fillL');
+	    introModal.append('div').attr('class', 'modal-section').append('h3').html(_t.html('splash.welcome'));
+	    var modalSection = introModal.append('div').attr('class', 'modal-section');
+	    modalSection.append('p').html(_t.html('splash.text', {
+	      version: context.version,
+	      website: '<a target="_blank" href="https://github.com/openstreetmap/iD/blob/develop/CHANGELOG.md#whats-new">changelog</a>',
+	      github: '<a target="_blank" href="https://github.com/openstreetmap/iD/issues">github.com</a>'
+	    }));
+	    modalSection.append('p').html(_t.html('splash.privacy', {
+	      updateMessage: updateMessage,
+	      privacyLink: '<a target="_blank" href="https://github.com/openstreetmap/iD/blob/release/PRIVACY.md">' + _t('splash.privacy_policy') + '</a>'
+	    }));
+	    var buttonWrap = introModal.append('div').attr('class', 'modal-actions');
+	    var walkthrough = buttonWrap.append('button').attr('class', 'walkthrough').on('click', function () {
+	      context.container().call(uiIntro(context));
+	      modalSelection.close();
+	    });
+	    walkthrough.append('svg').attr('class', 'logo logo-walkthrough').append('use').attr('xlink:href', '#iD-logo-walkthrough');
+	    walkthrough.append('div').html(_t.html('splash.walkthrough'));
+	    var startEditing = buttonWrap.append('button').attr('class', 'start-editing').on('click', modalSelection.close);
+	    startEditing.append('svg').attr('class', 'logo logo-features').append('use').attr('xlink:href', '#iD-logo-features');
+	    startEditing.append('div').html(_t.html('splash.start'));
+	    modalSelection.select('button.close').attr('class', 'hide');
+	  };
+	}
 
-	    presetList.presets = function(val) {
-	        if (!arguments.length) { return _currentPresets; }
-	        _currentPresets = val;
-	        return presetList;
-	    };
+	function uiStatus(context) {
+	  var osm = context.connection();
+	  return function (selection) {
+	    if (!osm) return;
 
-	    function entityGeometries() {
+	    function update(err, apiStatus) {
+	      selection.html('');
 
-	        var counts = {};
+	      if (err) {
+	        if (apiStatus === 'connectionSwitched') {
+	          // if the connection was just switched, we can't rely on
+	          // the status (we're getting the status of the previous api)
+	          return;
+	        } else if (apiStatus === 'rateLimited') {
+	          selection.html(_t.html('osm_api_status.message.rateLimit')).append('a').attr('href', '#').attr('class', 'api-status-login').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html('login')).on('click.login', function (d3_event) {
+	            d3_event.preventDefault();
+	            osm.authenticate();
+	          });
+	        } else {
+	          // don't allow retrying too rapidly
+	          var throttledRetry = throttle(function () {
+	            // try loading the visible tiles
+	            context.loadTiles(context.projection); // manually reload the status too in case all visible tiles were already loaded
 
-	        for (var i in _entityIDs) {
-	            var entityID = _entityIDs[i];
-	            var entity = context.entity(entityID);
-	            var geometry = entity.geometry(context.graph());
+	            osm.reloadApiStatus();
+	          }, 2000); // eslint-disable-next-line no-warning-comments
+	          // TODO: nice messages for different error types
 
-	            // Treat entities on addr:interpolation lines as points, not vertices (#3241)
-	            if (geometry === 'vertex' && entity.isOnAddressLine(context.graph())) {
-	                geometry = 'point';
-	            }
 
-	            if (!counts[geometry]) { counts[geometry] = 0; }
-	            counts[geometry] += 1;
+	          selection.html(_t.html('osm_api_status.message.error') + ' ').append('a').attr('href', '#') // let the user manually retry their connection directly
+	          .html(_t.html('osm_api_status.retry')).on('click.retry', function (d3_event) {
+	            d3_event.preventDefault();
+	            throttledRetry();
+	          });
 	        }
+	      } else if (apiStatus === 'readonly') {
+	        selection.html(_t.html('osm_api_status.message.readonly'));
+	      } else if (apiStatus === 'offline') {
+	        selection.html(_t.html('osm_api_status.message.offline'));
+	      }
 
-	        return Object.keys(counts).sort(function(geom1, geom2) {
-	            return counts[geom2] - counts[geom1];
-	        });
-	    }
-
-	    function combinedEntityExtent() {
-	        return _entityIDs.reduce(function(extent, entityID) {
-	            var entity = context.graph().entity(entityID);
-	            return extent.extend(entity.extent(context.graph()));
-	        }, geoExtent());
+	      selection.attr('class', 'api-status ' + (err ? 'error' : apiStatus));
 	    }
 
-	    return utilRebind(presetList, dispatch$1, 'on');
-	}
-
-	function uiInspector(context) {
-	    var presetList = uiPresetList(context);
-	    var entityEditor = uiEntityEditor(context);
-	    var wrap = select(null),
-	        presetPane = select(null),
-	        editorPane = select(null);
-	    var _state = 'select';
-	    var _entityIDs;
-	    var _newFeature = false;
-
-
-	    function inspector(selection) {
-	        presetList
-	            .entityIDs(_entityIDs)
-	            .autofocus(_newFeature)
-	            .on('choose', inspector.setPreset)
-	            .on('cancel', function() {
-	                wrap.transition()
-	                    .styleTween('right', function() { return interpolate('-100%', '0%'); });
-	                editorPane.call(entityEditor);
-	            });
+	    osm.on('apiStatusChange.uiStatus', update);
+	    context.history().on('storage_error', function () {
+	      selection.html(_t.html('osm_api_status.message.local_storage_full'));
+	      selection.attr('class', 'api-status error');
+	    }); // reload the status periodically regardless of other factors
 
-	        entityEditor
-	            .state(_state)
-	            .entityIDs(_entityIDs)
-	            .on('choose', inspector.showList);
+	    window.setInterval(function () {
+	      osm.reloadApiStatus();
+	    }, 90000); // load the initial status in case no OSM data was loaded yet
 
-	        wrap = selection.selectAll('.panewrap')
-	            .data([0]);
+	    osm.reloadApiStatus();
+	  };
+	}
 
-	        var enter = wrap.enter()
-	            .append('div')
-	            .attr('class', 'panewrap');
+	function modeDrawArea(context, wayID, startGraph, button) {
+	  var mode = {
+	    button: button,
+	    id: 'draw-area'
+	  };
+	  var behavior = behaviorDrawWay(context, wayID, mode, startGraph).on('rejectedSelfIntersection.modeDrawArea', function () {
+	    context.ui().flash.iconName('#iD-icon-no').label(_t('self_intersection.error.areas'))();
+	  });
+	  mode.wayID = wayID;
 
-	        enter
-	            .append('div')
-	            .attr('class', 'preset-list-pane pane');
+	  mode.enter = function () {
+	    context.install(behavior);
+	  };
 
-	        enter
-	            .append('div')
-	            .attr('class', 'entity-editor-pane pane');
+	  mode.exit = function () {
+	    context.uninstall(behavior);
+	  };
 
-	        wrap = wrap.merge(enter);
-	        presetPane = wrap.selectAll('.preset-list-pane');
-	        editorPane = wrap.selectAll('.entity-editor-pane');
+	  mode.selectedIDs = function () {
+	    return [wayID];
+	  };
 
-	        function shouldDefaultToPresetList() {
-	            // always show the inspector on hover
-	            if (_state !== 'select') { return false; }
+	  mode.activeID = function () {
+	    return behavior && behavior.activeID() || [];
+	  };
 
-	            // can only change preset on single selection
-	            if (_entityIDs.length !== 1) { return false; }
+	  return mode;
+	}
 
-	            var entityID = _entityIDs[0];
-	            var entity = context.hasEntity(entityID);
-	            if (!entity) { return false; }
+	function modeAddArea(context, mode) {
+	  mode.id = 'add-area';
+	  var behavior = behaviorAddWay(context).on('start', start).on('startFromWay', startFromWay).on('startFromNode', startFromNode);
+	  var defaultTags = {
+	    area: 'yes'
+	  };
+	  if (mode.preset) defaultTags = mode.preset.setTags(defaultTags, 'area');
 
-	            // default to inspector if there are already tags
-	            if (entity.hasNonGeometryTags()) { return false; }
+	  function actionClose(wayId) {
+	    return function (graph) {
+	      return graph.replace(graph.entity(wayId).close());
+	    };
+	  }
 
-	            // prompt to select preset if feature is new and untagged
-	            if (_newFeature) { return true; }
+	  function start(loc) {
+	    var startGraph = context.graph();
+	    var node = osmNode({
+	      loc: loc
+	    });
+	    var way = osmWay({
+	      tags: defaultTags
+	    });
+	    context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id), actionClose(way.id));
+	    context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
+	  }
 
-	            // all existing features except vertices should default to inspector
-	            if (entity.geometry(context.graph()) !== 'vertex') { return false; }
+	  function startFromWay(loc, edge) {
+	    var startGraph = context.graph();
+	    var node = osmNode({
+	      loc: loc
+	    });
+	    var way = osmWay({
+	      tags: defaultTags
+	    });
+	    context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id), actionClose(way.id), actionAddMidpoint({
+	      loc: loc,
+	      edge: edge
+	    }, node));
+	    context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
+	  }
 
-	            // show vertex relations if any
-	            if (context.graph().parentRelations(entity).length) { return false; }
+	  function startFromNode(node) {
+	    var startGraph = context.graph();
+	    var way = osmWay({
+	      tags: defaultTags
+	    });
+	    context.perform(actionAddEntity(way), actionAddVertex(way.id, node.id), actionClose(way.id));
+	    context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
+	  }
 
-	            // show vertex issues if there are any
-	            if (context.validator().getEntityIssues(entityID).length) { return false; }
+	  mode.enter = function () {
+	    context.install(behavior);
+	  };
 
-	            // show turn retriction editor for junction vertices
-	            if (entity.isHighwayIntersection(context.graph())) { return false; }
+	  mode.exit = function () {
+	    context.uninstall(behavior);
+	  };
 
-	            // otherwise show preset list for uninteresting vertices
-	            return true;
-	        }
+	  return mode;
+	}
 
-	        if (shouldDefaultToPresetList()) {
-	            wrap.style('right', '-100%');
-	            presetPane.call(presetList);
-	        } else {
-	            wrap.style('right', '0%');
-	            editorPane.call(entityEditor);
-	        }
+	function modeAddLine(context, mode) {
+	  mode.id = 'add-line';
+	  var behavior = behaviorAddWay(context).on('start', start).on('startFromWay', startFromWay).on('startFromNode', startFromNode);
+	  var defaultTags = {};
+	  if (mode.preset) defaultTags = mode.preset.setTags(defaultTags, 'line');
+
+	  function start(loc) {
+	    var startGraph = context.graph();
+	    var node = osmNode({
+	      loc: loc
+	    });
+	    var way = osmWay({
+	      tags: defaultTags
+	    });
+	    context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id));
+	    context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
+	  }
 
-	        var footer = selection.selectAll('.footer')
-	            .data([0]);
+	  function startFromWay(loc, edge) {
+	    var startGraph = context.graph();
+	    var node = osmNode({
+	      loc: loc
+	    });
+	    var way = osmWay({
+	      tags: defaultTags
+	    });
+	    context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id), actionAddMidpoint({
+	      loc: loc,
+	      edge: edge
+	    }, node));
+	    context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
+	  }
 
-	        footer = footer.enter()
-	            .append('div')
-	            .attr('class', 'footer')
-	            .merge(footer);
+	  function startFromNode(node) {
+	    var startGraph = context.graph();
+	    var way = osmWay({
+	      tags: defaultTags
+	    });
+	    context.perform(actionAddEntity(way), actionAddVertex(way.id, node.id));
+	    context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
+	  }
 
-	        footer
-	            .call(uiViewOnOSM(context)
-	                .what(context.hasEntity(_entityIDs.length === 1 && _entityIDs[0]))
-	            );
-	    }
+	  mode.enter = function () {
+	    context.install(behavior);
+	  };
 
-	    inspector.showList = function(presets) {
+	  mode.exit = function () {
+	    context.uninstall(behavior);
+	  };
 
-	        wrap.transition()
-	            .styleTween('right', function() { return interpolate('0%', '-100%'); });
+	  return mode;
+	}
 
-	        if (presets) {
-	            presetList.presets(presets);
-	        }
+	function modeAddPoint(context, mode) {
+	  mode.id = 'add-point';
+	  var behavior = behaviorDraw(context).on('click', add).on('clickWay', addWay).on('clickNode', addNode).on('cancel', cancel).on('finish', cancel);
+	  var defaultTags = {};
+	  if (mode.preset) defaultTags = mode.preset.setTags(defaultTags, 'point');
+
+	  function add(loc) {
+	    var node = osmNode({
+	      loc: loc,
+	      tags: defaultTags
+	    });
+	    context.perform(actionAddEntity(node), _t('operations.add.annotation.point'));
+	    enterSelectMode(node);
+	  }
 
-	        presetPane
-	            .call(presetList.autofocus(true));
-	    };
+	  function addWay(loc, edge) {
+	    var node = osmNode({
+	      tags: defaultTags
+	    });
+	    context.perform(actionAddMidpoint({
+	      loc: loc,
+	      edge: edge
+	    }, node), _t('operations.add.annotation.vertex'));
+	    enterSelectMode(node);
+	  }
 
-	    inspector.setPreset = function(preset) {
+	  function enterSelectMode(node) {
+	    context.enter(modeSelect(context, [node.id]).newFeature(true));
+	  }
 
-	        // upon setting multipolygon, go to the area preset list instead of the editor
-	        if (preset.id === 'type/multipolygon') {
-	            presetPane
-	                .call(presetList.autofocus(true));
+	  function addNode(node) {
+	    if (Object.keys(defaultTags).length === 0) {
+	      enterSelectMode(node);
+	      return;
+	    }
 
-	        } else {
-	            wrap.transition()
-	                .styleTween('right', function() { return interpolate('-100%', '0%'); });
+	    var tags = Object.assign({}, node.tags); // shallow copy
 
-	            editorPane
-	                .call(entityEditor.presets([preset]));
-	        }
+	    for (var key in defaultTags) {
+	      tags[key] = defaultTags[key];
+	    }
 
-	    };
+	    context.perform(actionChangeTags(node.id, tags), _t('operations.add.annotation.point'));
+	    enterSelectMode(node);
+	  }
 
-	    inspector.state = function(val) {
-	        if (!arguments.length) { return _state; }
-	        _state = val;
-	        entityEditor.state(_state);
+	  function cancel() {
+	    context.enter(modeBrowse(context));
+	  }
 
-	        // remove any old field help overlay that might have gotten attached to the inspector
-	        context.container().selectAll('.field-help-body').remove();
+	  mode.enter = function () {
+	    context.install(behavior);
+	  };
 
-	        return inspector;
-	    };
+	  mode.exit = function () {
+	    context.uninstall(behavior);
+	  };
 
+	  return mode;
+	}
 
-	    inspector.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return inspector;
-	    };
+	function modeSelectNote(context, selectedNoteID) {
+	  var mode = {
+	    id: 'select-note',
+	    button: 'browse'
+	  };
 
+	  var _keybinding = utilKeybinding('select-note');
 
-	    inspector.newFeature = function(val) {
-	        if (!arguments.length) { return _newFeature; }
-	        _newFeature = val;
-	        return inspector;
-	    };
+	  var _noteEditor = uiNoteEditor(context).on('change', function () {
+	    context.map().pan([0, 0]); // trigger a redraw
 
+	    var note = checkSelectedID();
+	    if (!note) return;
+	    context.ui().sidebar.show(_noteEditor.note(note));
+	  });
 
-	    return inspector;
-	}
+	  var _behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
+	  var _newFeature = false;
 
-	function uiSidebar(context) {
-	    var inspector = uiInspector(context);
-	    var dataEditor = uiDataEditor(context);
-	    var noteEditor = uiNoteEditor(context);
-	    var improveOsmEditor = uiImproveOsmEditor(context);
-	    var keepRightEditor = uiKeepRightEditor(context);
-	    var osmoseEditor = uiOsmoseEditor(context);
-	    var _current;
-	    var _wasData = false;
-	    var _wasNote = false;
-	    var _wasQaItem = false;
-
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
-
-
-	    function sidebar(selection) {
-	        var container = context.container();
-	        var minWidth = 240;
-	        var sidebarWidth;
-	        var containerWidth;
-	        var dragOffset;
-
-	        // Set the initial width constraints
-	        selection
-	            .style('min-width', minWidth + 'px')
-	            .style('max-width', '400px')
-	            .style('width', '33.3333%');
-
-	        var resizer = selection
-	            .append('div')
-	            .attr('class', 'sidebar-resizer')
-	            .on(_pointerPrefix + 'down.sidebar-resizer', pointerdown);
+	  function checkSelectedID() {
+	    if (!services.osm) return;
+	    var note = services.osm.getNote(selectedNoteID);
 
-	        var downPointerId, lastClientX, containerLocGetter;
+	    if (!note) {
+	      context.enter(modeBrowse(context));
+	    }
 
-	        function pointerdown() {
-	            if (downPointerId) { return; }
+	    return note;
+	  } // class the note as selected, or return to browse mode if the note is gone
 
-	            if ('button' in event && event.button !== 0) { return; }
 
-	            downPointerId = event.pointerId || 'mouse';
+	  function selectNote(d3_event, drawn) {
+	    if (!checkSelectedID()) return;
+	    var selection = context.surface().selectAll('.layer-notes .note-' + selectedNoteID);
 
-	            lastClientX = event.clientX;
+	    if (selection.empty()) {
+	      // Return to browse mode if selected DOM elements have
+	      // disappeared because the user moved them out of view..
+	      var source = d3_event && d3_event.type === 'zoom' && d3_event.sourceEvent;
 
-	            containerLocGetter = utilFastMouse(container.node());
+	      if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
+	        context.enter(modeBrowse(context));
+	      }
+	    } else {
+	      selection.classed('selected', true);
+	      context.selectedNoteID(selectedNoteID);
+	    }
+	  }
 
-	            // offset from edge of sidebar-resizer
-	            dragOffset = utilFastMouse(resizer.node())(event)[0] - 1;
+	  function esc() {
+	    if (context.container().select('.combobox').size()) return;
+	    context.enter(modeBrowse(context));
+	  }
 
-	            sidebarWidth = selection.node().getBoundingClientRect().width;
-	            containerWidth = container.node().getBoundingClientRect().width;
-	            var widthPct = (sidebarWidth / containerWidth) * 100;
-	            selection
-	                .style('width', widthPct + '%')    // lock in current width
-	                .style('max-width', '85%');        // but allow larger widths
+	  mode.zoomToSelected = function () {
+	    if (!services.osm) return;
+	    var note = services.osm.getNote(selectedNoteID);
 
-	            resizer.classed('dragging', true);
+	    if (note) {
+	      context.map().centerZoomEase(note.loc, 20);
+	    }
+	  };
 
-	            select(window)
-	                .on('touchmove.sidebar-resizer', function() {
-	                    // disable page scrolling while resizing on touch input
-	                    event.preventDefault();
-	                }, { passive: false })
-	                .on(_pointerPrefix + 'move.sidebar-resizer', pointermove)
-	                .on(_pointerPrefix + 'up.sidebar-resizer pointercancel.sidebar-resizer', pointerup);
-	        }
+	  mode.newFeature = function (val) {
+	    if (!arguments.length) return _newFeature;
+	    _newFeature = val;
+	    return mode;
+	  };
 
-	        function pointermove() {
+	  mode.enter = function () {
+	    var note = checkSelectedID();
+	    if (!note) return;
 
-	            if (downPointerId !== (event.pointerId || 'mouse')) { return; }
+	    _behaviors.forEach(context.install);
 
-	            event.preventDefault();
+	    _keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);
 
-	            var dx = event.clientX - lastClientX;
+	    select(document).call(_keybinding);
+	    selectNote();
+	    var sidebar = context.ui().sidebar;
+	    sidebar.show(_noteEditor.note(note).newNote(_newFeature)); // expand the sidebar, avoid obscuring the note if needed
 
-	            lastClientX = event.clientX;
+	    sidebar.expand(sidebar.intersects(note.extent()));
+	    context.map().on('drawn.select', selectNote);
+	  };
 
-	            var isRTL = (_mainLocalizer.textDirection() === 'rtl');
-	            var scaleX = isRTL ? 0 : 1;
-	            var xMarginProperty = isRTL ? 'margin-right' : 'margin-left';
+	  mode.exit = function () {
+	    _behaviors.forEach(context.uninstall);
 
-	            var x = containerLocGetter(event)[0] - dragOffset;
-	            sidebarWidth = isRTL ? containerWidth - x : x;
+	    select(document).call(_keybinding.unbind);
+	    context.surface().selectAll('.layer-notes .selected').classed('selected hover', false);
+	    context.map().on('drawn.select', null);
+	    context.ui().sidebar.hide();
+	    context.selectedNoteID(null);
+	  };
 
-	            var isCollapsed = selection.classed('collapsed');
-	            var shouldCollapse = sidebarWidth < minWidth;
+	  return mode;
+	}
 
-	            selection.classed('collapsed', shouldCollapse);
+	function modeAddNote(context) {
+	  var mode = {
+	    id: 'add-note',
+	    button: 'note',
+	    description: _t.html('modes.add_note.description'),
+	    key: _t('modes.add_note.key')
+	  };
+	  var behavior = behaviorDraw(context).on('click', add).on('cancel', cancel).on('finish', cancel);
+
+	  function add(loc) {
+	    var osm = services.osm;
+	    if (!osm) return;
+	    var note = osmNote({
+	      loc: loc,
+	      status: 'open',
+	      comments: []
+	    });
+	    osm.replaceNote(note); // force a reraw (there is no history change that would otherwise do this)
 
-	            if (shouldCollapse) {
-	                if (!isCollapsed) {
-	                    selection
-	                        .style(xMarginProperty, '-400px')
-	                        .style('width', '400px');
+	    context.map().pan([0, 0]);
+	    context.selectedNoteID(note.id).enter(modeSelectNote(context, note.id).newFeature(true));
+	  }
 
-	                    context.ui().onResize([(sidebarWidth - dx) * scaleX, 0]);
-	                }
+	  function cancel() {
+	    context.enter(modeBrowse(context));
+	  }
 
-	            } else {
-	                var widthPct = (sidebarWidth / containerWidth) * 100;
-	                selection
-	                    .style(xMarginProperty, null)
-	                    .style('width', widthPct + '%');
+	  mode.enter = function () {
+	    context.install(behavior);
+	  };
 
-	                if (isCollapsed) {
-	                    context.ui().onResize([-sidebarWidth * scaleX, 0]);
-	                } else {
-	                    context.ui().onResize([-dx * scaleX, 0]);
-	                }
-	            }
-	        }
+	  mode.exit = function () {
+	    context.uninstall(behavior);
+	  };
 
-	        function pointerup() {
-	            if (downPointerId !== (event.pointerId || 'mouse')) { return; }
+	  return mode;
+	}
 
-	            downPointerId = null;
+	var JXON = new function () {
+	  var sValueProp = 'keyValue',
+	      sAttributesProp = 'keyAttributes',
+	      sAttrPref = '@',
 
-	            resizer.classed('dragging', false);
+	  /* you can customize these values */
+	  aCache = [],
+	      rIsNull = /^\s*$/,
+	      rIsBool = /^(?:true|false)$/i;
 
-	            select(window)
-	                .on('touchmove.sidebar-resizer', null)
-	                .on(_pointerPrefix + 'move.sidebar-resizer', null)
-	                .on(_pointerPrefix + 'up.sidebar-resizer pointercancel.sidebar-resizer', null);
-	        }
+	  function parseText(sValue) {
+	    if (rIsNull.test(sValue)) {
+	      return null;
+	    }
 
-	        var featureListWrap = selection
-	            .append('div')
-	            .attr('class', 'feature-list-pane')
-	            .call(uiFeatureList(context));
+	    if (rIsBool.test(sValue)) {
+	      return sValue.toLowerCase() === 'true';
+	    }
 
-	        var inspectorWrap = selection
-	            .append('div')
-	            .attr('class', 'inspector-hidden inspector-wrap');
+	    if (isFinite(sValue)) {
+	      return parseFloat(sValue);
+	    }
 
-	        var hoverModeSelect = function(targets) {
-	            context.container().selectAll('.feature-list-item').classed('hover', false);
+	    if (isFinite(Date.parse(sValue))) {
+	      return new Date(sValue);
+	    }
 
-	            if (context.selectedIDs().length > 1 &&
-	                targets && targets.length) {
+	    return sValue;
+	  }
 
-	                var elements = context.container().selectAll('.feature-list-item')
-	                    .filter(function (node) {
-	                        return targets.indexOf(node) !== -1;
-	                    });
+	  function EmptyTree() {}
 
-	                if (!elements.empty()) {
-	                    elements.classed('hover', true);
-	                }
-	            }
-	        };
+	  EmptyTree.prototype.toString = function () {
+	    return 'null';
+	  };
 
-	        sidebar.hoverModeSelect = throttle(hoverModeSelect, 200);
+	  EmptyTree.prototype.valueOf = function () {
+	    return null;
+	  };
 
-	        function hover(targets) {
-	            var datum = targets && targets.length && targets[0];
-	            if (datum && datum.__featurehash__) {   // hovering on data
-	                _wasData = true;
-	                sidebar
-	                    .show(dataEditor.datum(datum));
+	  function objectify(vValue) {
+	    return vValue === null ? new EmptyTree() : vValue instanceof Object ? vValue : new vValue.constructor(vValue);
+	  }
 
-	                selection.selectAll('.sidebar-component')
-	                    .classed('inspector-hover', true);
+	  function createObjTree(oParentNode, nVerb, bFreeze, bNesteAttr) {
+	    var nLevelStart = aCache.length,
+	        bChildren = oParentNode.hasChildNodes(),
+	        bAttributes = oParentNode.hasAttributes(),
+	        bHighVerb = Boolean(nVerb & 2);
+	    var sProp,
+	        vContent,
+	        nLength = 0,
+	        sCollectedTxt = '',
+	        vResult = bHighVerb ? {} :
+	    /* put here the default value for empty nodes: */
+	    true;
 
-	            } else if (datum instanceof osmNote) {
-	                if (context.mode().id === 'drag-note') { return; }
-	                _wasNote = true;
+	    if (bChildren) {
+	      for (var oNode, nItem = 0; nItem < oParentNode.childNodes.length; nItem++) {
+	        oNode = oParentNode.childNodes.item(nItem);
 
-	                var osm = services.osm;
-	                if (osm) {
-	                    datum = osm.getNote(datum.id);   // marker may contain stale data - get latest
-	                }
+	        if (oNode.nodeType === 4) {
+	          /* nodeType is 'CDATASection' (4) */
+	          sCollectedTxt += oNode.nodeValue;
+	        } else if (oNode.nodeType === 3) {
+	          /* nodeType is 'Text' (3) */
+	          sCollectedTxt += oNode.nodeValue.trim();
+	        } else if (oNode.nodeType === 1 && !oNode.prefix) {
+	          /* nodeType is 'Element' (1) */
+	          aCache.push(oNode);
+	        }
+	      }
+	    }
 
-	                sidebar
-	                    .show(noteEditor.note(datum));
+	    var nLevelEnd = aCache.length,
+	        vBuiltVal = parseText(sCollectedTxt);
 
-	                selection.selectAll('.sidebar-component')
-	                    .classed('inspector-hover', true);
+	    if (!bHighVerb && (bChildren || bAttributes)) {
+	      vResult = nVerb === 0 ? objectify(vBuiltVal) : {};
+	    }
 
-	            } else if (datum instanceof QAItem) {
-	                _wasQaItem = true;
+	    for (var nElId = nLevelStart; nElId < nLevelEnd; nElId++) {
+	      sProp = aCache[nElId].nodeName.toLowerCase();
+	      vContent = createObjTree(aCache[nElId], nVerb, bFreeze, bNesteAttr);
 
-	                var errService = services[datum.service];
-	                if (errService) {
-	                    // marker may contain stale data - get latest
-	                    datum = errService.getError(datum.id);
-	                }
+	      if (vResult.hasOwnProperty(sProp)) {
+	        if (vResult[sProp].constructor !== Array) {
+	          vResult[sProp] = [vResult[sProp]];
+	        }
 
-	                // Currently only three possible services
-	                var errEditor;
-	                if (datum.service === 'keepRight') {
-	                    errEditor = keepRightEditor;
-	                } else if (datum.service === 'osmose') {
-	                    errEditor = osmoseEditor;
-	                } else {
-	                    errEditor = improveOsmEditor;
-	                }
+	        vResult[sProp].push(vContent);
+	      } else {
+	        vResult[sProp] = vContent;
+	        nLength++;
+	      }
+	    }
 
-	                context.container().selectAll('.qaItem.' + datum.service)
-	                    .classed('hover', function(d) { return d.id === datum.id; });
+	    if (bAttributes) {
+	      var nAttrLen = oParentNode.attributes.length,
+	          sAPrefix = bNesteAttr ? '' : sAttrPref,
+	          oAttrParent = bNesteAttr ? {} : vResult;
 
-	                sidebar
-	                    .show(errEditor.error(datum));
+	      for (var oAttrib, nAttrib = 0; nAttrib < nAttrLen; nLength++, nAttrib++) {
+	        oAttrib = oParentNode.attributes.item(nAttrib);
+	        oAttrParent[sAPrefix + oAttrib.name.toLowerCase()] = parseText(oAttrib.value.trim());
+	      }
 
-	                selection.selectAll('.sidebar-component')
-	                    .classed('inspector-hover', true);
+	      if (bNesteAttr) {
+	        if (bFreeze) {
+	          Object.freeze(oAttrParent);
+	        }
 
-	            } else if (!_current && (datum instanceof osmEntity)) {
-	                featureListWrap
-	                    .classed('inspector-hidden', true);
+	        vResult[sAttributesProp] = oAttrParent;
+	        nLength -= nAttrLen - 1;
+	      }
+	    }
 
-	                inspectorWrap
-	                    .classed('inspector-hidden', false)
-	                    .classed('inspector-hover', true);
+	    if (nVerb === 3 || (nVerb === 2 || nVerb === 1 && nLength > 0) && sCollectedTxt) {
+	      vResult[sValueProp] = vBuiltVal;
+	    } else if (!bHighVerb && nLength === 0 && sCollectedTxt) {
+	      vResult = vBuiltVal;
+	    }
 
-	                if (!inspector.entityIDs() || !utilArrayIdentical(inspector.entityIDs(), [datum.id]) || inspector.state() !== 'hover') {
-	                    inspector
-	                        .state('hover')
-	                        .entityIDs([datum.id])
-	                        .newFeature(false);
+	    if (bFreeze && (bHighVerb || nLength > 0)) {
+	      Object.freeze(vResult);
+	    }
 
-	                    inspectorWrap
-	                        .call(inspector);
-	                }
+	    aCache.length = nLevelStart;
+	    return vResult;
+	  }
 
-	            } else if (!_current) {
-	                featureListWrap
-	                    .classed('inspector-hidden', false);
-	                inspectorWrap
-	                    .classed('inspector-hidden', true);
-	                inspector
-	                    .state('hide');
-
-	            } else if (_wasData || _wasNote || _wasQaItem) {
-	                _wasNote = false;
-	                _wasData = false;
-	                _wasQaItem = false;
-	                context.container().selectAll('.note').classed('hover', false);
-	                context.container().selectAll('.qaItem').classed('hover', false);
-	                sidebar.hide();
-	            }
-	        }
+	  function loadObjTree(oXMLDoc, oParentEl, oParentObj) {
+	    var vValue, oChild;
 
-	        sidebar.hover = throttle(hover, 200);
+	    if (oParentObj instanceof String || oParentObj instanceof Number || oParentObj instanceof Boolean) {
+	      oParentEl.appendChild(oXMLDoc.createTextNode(oParentObj.toString()));
+	      /* verbosity level is 0 */
+	    } else if (oParentObj.constructor === Date) {
+	      oParentEl.appendChild(oXMLDoc.createTextNode(oParentObj.toGMTString()));
+	    }
 
+	    for (var sName in oParentObj) {
+	      vValue = oParentObj[sName];
 
-	        sidebar.intersects = function(extent) {
-	            var rect = selection.node().getBoundingClientRect();
-	            return extent.intersects([
-	                context.projection.invert([0, rect.height]),
-	                context.projection.invert([rect.width, 0])
-	            ]);
-	        };
+	      if (isFinite(sName) || vValue instanceof Function) {
+	        continue;
+	      }
+	      /* verbosity level is 0 */
 
 
-	        sidebar.select = function(ids, newFeature) {
-	            sidebar.hide();
+	      if (sName === sValueProp) {
+	        if (vValue !== null && vValue !== true) {
+	          oParentEl.appendChild(oXMLDoc.createTextNode(vValue.constructor === Date ? vValue.toGMTString() : String(vValue)));
+	        }
+	      } else if (sName === sAttributesProp) {
+	        /* verbosity level is 3 */
+	        for (var sAttrib in vValue) {
+	          oParentEl.setAttribute(sAttrib, vValue[sAttrib]);
+	        }
+	      } else if (sName.charAt(0) === sAttrPref) {
+	        oParentEl.setAttribute(sName.slice(1), vValue);
+	      } else if (vValue.constructor === Array) {
+	        for (var nItem = 0; nItem < vValue.length; nItem++) {
+	          oChild = oXMLDoc.createElement(sName);
+	          loadObjTree(oXMLDoc, oChild, vValue[nItem]);
+	          oParentEl.appendChild(oChild);
+	        }
+	      } else {
+	        oChild = oXMLDoc.createElement(sName);
 
-	            if (ids && ids.length) {
+	        if (vValue instanceof Object) {
+	          loadObjTree(oXMLDoc, oChild, vValue);
+	        } else if (vValue !== null && vValue !== true) {
+	          oChild.appendChild(oXMLDoc.createTextNode(vValue.toString()));
+	        }
 
-	                var entity = ids.length === 1 && context.entity(ids[0]);
-	                if (entity && newFeature && selection.classed('collapsed')) {
-	                    // uncollapse the sidebar
-	                    var extent = entity.extent(context.graph());
-	                    sidebar.expand(sidebar.intersects(extent));
-	                }
+	        oParentEl.appendChild(oChild);
+	      }
+	    }
+	  }
 
-	                featureListWrap
-	                    .classed('inspector-hidden', true);
+	  this.build = function (oXMLParent, nVerbosity
+	  /* optional */
+	  , bFreeze
+	  /* optional */
+	  , bNesteAttributes
+	  /* optional */
+	  ) {
+	    var _nVerb = arguments.length > 1 && typeof nVerbosity === 'number' ? nVerbosity & 3 :
+	    /* put here the default verbosity level: */
+	    1;
 
-	                inspectorWrap
-	                    .classed('inspector-hidden', false)
-	                    .classed('inspector-hover', false);
+	    return createObjTree(oXMLParent, _nVerb, bFreeze || false, arguments.length > 3 ? bNesteAttributes : _nVerb === 3);
+	  };
 
-	                // reload the UI even if the ids are the same since the entities
-	                // themselves may have changed
-	                inspector
-	                    .state('select')
-	                    .entityIDs(ids)
-	                    .newFeature(newFeature);
+	  this.unbuild = function (oObjTree) {
+	    var oNewDoc = document.implementation.createDocument('', '', null);
+	    loadObjTree(oNewDoc, oNewDoc, oObjTree);
+	    return oNewDoc;
+	  };
 
-	                inspectorWrap
-	                    .call(inspector);
+	  this.stringify = function (oObjTree) {
+	    return new XMLSerializer().serializeToString(JXON.unbuild(oObjTree));
+	  };
+	}(); // var myObject = JXON.build(doc);
+	// we got our javascript object! try: alert(JSON.stringify(myObject));
+	// var newDoc = JXON.unbuild(myObject);
+	// we got our Document instance! try: alert((new XMLSerializer()).serializeToString(newDoc));
 
-	            } else {
-	                inspector
-	                    .state('hide');
-	            }
-	        };
+	function uiConflicts(context) {
+	  var dispatch = dispatch$8('cancel', 'save');
+	  var keybinding = utilKeybinding('conflicts');
 
+	  var _origChanges;
 
-	        sidebar.showPresetList = function() {
-	            inspector.showList();
-	        };
+	  var _conflictList;
 
+	  var _shownConflictIndex;
 
-	        sidebar.show = function(component, element) {
-	            featureListWrap
-	                .classed('inspector-hidden', true);
-	            inspectorWrap
-	                .classed('inspector-hidden', true);
+	  function keybindingOn() {
+	    select(document).call(keybinding.on('⎋', cancel, true));
+	  }
 
-	            if (_current) { _current.remove(); }
-	            _current = selection
-	                .append('div')
-	                .attr('class', 'sidebar-component')
-	                .call(component, element);
-	        };
+	  function keybindingOff() {
+	    select(document).call(keybinding.unbind);
+	  }
 
+	  function tryAgain() {
+	    keybindingOff();
+	    dispatch.call('save');
+	  }
 
-	        sidebar.hide = function() {
-	            featureListWrap
-	                .classed('inspector-hidden', false);
-	            inspectorWrap
-	                .classed('inspector-hidden', true);
+	  function cancel() {
+	    keybindingOff();
+	    dispatch.call('cancel');
+	  }
 
-	            if (_current) { _current.remove(); }
-	            _current = null;
-	        };
+	  function conflicts(selection) {
+	    keybindingOn();
+	    var headerEnter = selection.selectAll('.header').data([0]).enter().append('div').attr('class', 'header fillL');
+	    headerEnter.append('button').attr('class', 'fr').on('click', cancel).call(svgIcon('#iD-icon-close'));
+	    headerEnter.append('h3').html(_t.html('save.conflict.header'));
+	    var bodyEnter = selection.selectAll('.body').data([0]).enter().append('div').attr('class', 'body fillL');
+	    var conflictsHelpEnter = bodyEnter.append('div').attr('class', 'conflicts-help').html(_t.html('save.conflict.help')); // Download changes link
 
+	    var detected = utilDetect();
+	    var changeset = new osmChangeset();
+	    delete changeset.id; // Export without changeset_id
 
-	        sidebar.expand = function(moveMap) {
-	            if (selection.classed('collapsed')) {
-	                sidebar.toggle(moveMap);
-	            }
-	        };
+	    var data = JXON.stringify(changeset.osmChangeJXON(_origChanges));
+	    var blob = new Blob([data], {
+	      type: 'text/xml;charset=utf-8;'
+	    });
+	    var fileName = 'changes.osc';
+	    var linkEnter = conflictsHelpEnter.selectAll('.download-changes').append('a').attr('class', 'download-changes');
 
+	    if (detected.download) {
+	      // All except IE11 and Edge
+	      linkEnter // download the data as a file
+	      .attr('href', window.URL.createObjectURL(blob)).attr('download', fileName);
+	    } else {
+	      // IE11 and Edge
+	      linkEnter // open data uri in a new tab
+	      .attr('target', '_blank').on('click.download', function () {
+	        navigator.msSaveBlob(blob, fileName);
+	      });
+	    }
 
-	        sidebar.collapse = function(moveMap) {
-	            if (!selection.classed('collapsed')) {
-	                sidebar.toggle(moveMap);
-	            }
-	        };
+	    linkEnter.call(svgIcon('#iD-icon-load', 'inline')).append('span').html(_t.html('save.conflict.download_changes'));
+	    bodyEnter.append('div').attr('class', 'conflict-container fillL3').call(showConflict, 0);
+	    bodyEnter.append('div').attr('class', 'conflicts-done').attr('opacity', 0).style('display', 'none').html(_t.html('save.conflict.done'));
+	    var buttonsEnter = bodyEnter.append('div').attr('class', 'buttons col12 joined conflicts-buttons');
+	    buttonsEnter.append('button').attr('disabled', _conflictList.length > 1).attr('class', 'action conflicts-button col6').html(_t.html('save.title')).on('click.try_again', tryAgain);
+	    buttonsEnter.append('button').attr('class', 'secondary-action conflicts-button col6').html(_t.html('confirm.cancel')).on('click.cancel', cancel);
+	  }
+
+	  function showConflict(selection, index) {
+	    index = utilWrap(index, _conflictList.length);
+	    _shownConflictIndex = index;
+	    var parent = select(selection.node().parentNode); // enable save button if this is the last conflict being reviewed..
+
+	    if (index === _conflictList.length - 1) {
+	      window.setTimeout(function () {
+	        parent.select('.conflicts-button').attr('disabled', null);
+	        parent.select('.conflicts-done').transition().attr('opacity', 1).style('display', 'block');
+	      }, 250);
+	    }
+
+	    var conflict = selection.selectAll('.conflict').data([_conflictList[index]]);
+	    conflict.exit().remove();
+	    var conflictEnter = conflict.enter().append('div').attr('class', 'conflict');
+	    conflictEnter.append('h4').attr('class', 'conflict-count').html(_t.html('save.conflict.count', {
+	      num: index + 1,
+	      total: _conflictList.length
+	    }));
+	    conflictEnter.append('a').attr('class', 'conflict-description').attr('href', '#').html(function (d) {
+	      return d.name;
+	    }).on('click', function (d3_event, d) {
+	      d3_event.preventDefault();
+	      zoomToEntity(d.id);
+	    });
+	    var details = conflictEnter.append('div').attr('class', 'conflict-detail-container');
+	    details.append('ul').attr('class', 'conflict-detail-list').selectAll('li').data(function (d) {
+	      return d.details || [];
+	    }).enter().append('li').attr('class', 'conflict-detail-item').html(function (d) {
+	      return d;
+	    });
+	    details.append('div').attr('class', 'conflict-choices').call(addChoices);
+	    details.append('div').attr('class', 'conflict-nav-buttons joined cf').selectAll('button').data(['previous', 'next']).enter().append('button').html(function (d) {
+	      return _t.html('save.conflict.' + d);
+	    }).attr('class', 'conflict-nav-button action col6').attr('disabled', function (d, i) {
+	      return i === 0 && index === 0 || i === 1 && index === _conflictList.length - 1 || null;
+	    }).on('click', function (d3_event, d) {
+	      d3_event.preventDefault();
+	      var container = parent.selectAll('.conflict-container');
+	      var sign = d === 'previous' ? -1 : 1;
+	      container.selectAll('.conflict').remove();
+	      container.call(showConflict, index + sign);
+	    });
+	  }
 
+	  function addChoices(selection) {
+	    var choices = selection.append('ul').attr('class', 'layer-list').selectAll('li').data(function (d) {
+	      return d.choices || [];
+	    }); // enter
 
-	        sidebar.toggle = function(moveMap) {
-	            var e = event;
-	            if (e && e.sourceEvent) {
-	                e.sourceEvent.preventDefault();
-	            } else if (e) {
-	                e.preventDefault();
-	            }
+	    var choicesEnter = choices.enter().append('li').attr('class', 'layer');
+	    var labelEnter = choicesEnter.append('label');
+	    labelEnter.append('input').attr('type', 'radio').attr('name', function (d) {
+	      return d.id;
+	    }).on('change', function (d3_event, d) {
+	      var ul = this.parentNode.parentNode.parentNode;
+	      ul.__data__.chosen = d.id;
+	      choose(d3_event, ul, d);
+	    });
+	    labelEnter.append('span').html(function (d) {
+	      return d.text;
+	    }); // update
 
-	            // Don't allow sidebar to toggle when the user is in the walkthrough.
-	            if (context.inIntro()) { return; }
+	    choicesEnter.merge(choices).each(function (d) {
+	      var ul = this.parentNode;
 
-	            var isCollapsed = selection.classed('collapsed');
-	            var isCollapsing = !isCollapsed;
-	            var isRTL = (_mainLocalizer.textDirection() === 'rtl');
-	            var scaleX = isRTL ? 0 : 1;
-	            var xMarginProperty = isRTL ? 'margin-right' : 'margin-left';
+	      if (ul.__data__.chosen === d.id) {
+	        choose(null, ul, d);
+	      }
+	    });
+	  }
 
-	            sidebarWidth = selection.node().getBoundingClientRect().width;
+	  function choose(d3_event, ul, datum) {
+	    if (d3_event) d3_event.preventDefault();
+	    select(ul).selectAll('li').classed('active', function (d) {
+	      return d === datum;
+	    }).selectAll('input').property('checked', function (d) {
+	      return d === datum;
+	    });
+	    var extent = geoExtent();
+	    var entity;
+	    entity = context.graph().hasEntity(datum.id);
+	    if (entity) extent._extend(entity.extent(context.graph()));
+	    datum.action();
+	    entity = context.graph().hasEntity(datum.id);
+	    if (entity) extent._extend(entity.extent(context.graph()));
+	    zoomToEntity(datum.id, extent);
+	  }
+
+	  function zoomToEntity(id, extent) {
+	    context.surface().selectAll('.hover').classed('hover', false);
+	    var entity = context.graph().hasEntity(id);
+
+	    if (entity) {
+	      if (extent) {
+	        context.map().trimmedExtent(extent);
+	      } else {
+	        context.map().zoomToEase(entity);
+	      }
 
-	            // switch from % to px
-	            selection.style('width', sidebarWidth + 'px');
+	      context.surface().selectAll(utilEntityOrMemberSelector([entity.id], context.graph())).classed('hover', true);
+	    }
+	  } // The conflict list should be an array of objects like:
+	  // {
+	  //     id: id,
+	  //     name: entityName(local),
+	  //     details: merge.conflicts(),
+	  //     chosen: 1,
+	  //     choices: [
+	  //         choice(id, keepMine, forceLocal),
+	  //         choice(id, keepTheirs, forceRemote)
+	  //     ]
+	  // }
 
-	            var startMargin, endMargin, lastMargin;
-	            if (isCollapsing) {
-	                startMargin = lastMargin = 0;
-	                endMargin = -sidebarWidth;
-	            } else {
-	                startMargin = lastMargin = -sidebarWidth;
-	                endMargin = 0;
-	            }
 
-	            selection.transition()
-	                .style(xMarginProperty, endMargin + 'px')
-	                .tween('panner', function() {
-	                    var i = d3_interpolateNumber(startMargin, endMargin);
-	                    return function(t) {
-	                        var dx = lastMargin - Math.round(i(t));
-	                        lastMargin = lastMargin - dx;
-	                        context.ui().onResize(moveMap ? undefined : [dx * scaleX, 0]);
-	                    };
-	                })
-	                .on('end', function() {
-	                    selection.classed('collapsed', isCollapsing);
-
-	                    // switch back from px to %
-	                    if (!isCollapsing) {
-	                        var containerWidth = container.node().getBoundingClientRect().width;
-	                        var widthPct = (sidebarWidth / containerWidth) * 100;
-	                        selection
-	                            .style(xMarginProperty, null)
-	                            .style('width', widthPct + '%');
-	                    }
-	                });
-	        };
+	  conflicts.conflictList = function (_) {
+	    if (!arguments.length) return _conflictList;
+	    _conflictList = _;
+	    return conflicts;
+	  };
 
-	        // toggle the sidebar collapse when double-clicking the resizer
-	        resizer.on('dblclick', sidebar.toggle);
+	  conflicts.origChanges = function (_) {
+	    if (!arguments.length) return _origChanges;
+	    _origChanges = _;
+	    return conflicts;
+	  };
 
-	        // ensure hover sidebar is closed when zooming out beyond editable zoom
-	        context.map().on('crossEditableZoom.sidebar', function(within) {
-	            if (!within && !selection.select('.inspector-hover').empty()) {
-	                hover([]);
-	            }
-	        });
+	  conflicts.shownEntityIds = function () {
+	    if (_conflictList && typeof _shownConflictIndex === 'number') {
+	      return [_conflictList[_shownConflictIndex].id];
 	    }
 
-	    sidebar.showPresetList = function() {};
-	    sidebar.hover = function() {};
-	    sidebar.hover.cancel = function() {};
-	    sidebar.intersects = function() {};
-	    sidebar.select = function() {};
-	    sidebar.show = function() {};
-	    sidebar.hide = function() {};
-	    sidebar.expand = function() {};
-	    sidebar.collapse = function() {};
-	    sidebar.toggle = function() {};
+	    return [];
+	  };
 
-	    return sidebar;
+	  return utilRebind(conflicts, dispatch, 'on');
 	}
 
-	function uiSourceSwitch(context) {
-	    var keys;
+	function uiConfirm(selection) {
+	  var modalSelection = uiModal(selection);
+	  modalSelection.select('.modal').classed('modal-alert', true);
+	  var section = modalSelection.select('.content');
+	  section.append('div').attr('class', 'modal-section header');
+	  section.append('div').attr('class', 'modal-section message-text');
+	  var buttons = section.append('div').attr('class', 'modal-section buttons cf');
+
+	  modalSelection.okButton = function () {
+	    buttons.append('button').attr('class', 'button ok-button action').on('click.confirm', function () {
+	      modalSelection.remove();
+	    }).html(_t.html('confirm.okay')).node().focus();
+	    return modalSelection;
+	  };
 
+	  return modalSelection;
+	}
 
-	    function click() {
-	        event.preventDefault();
+	function uiChangesetEditor(context) {
+	  var dispatch = dispatch$8('change');
+	  var formFields = uiFormFields(context);
+	  var commentCombo = uiCombobox(context, 'comment').caseSensitive(true);
 
-	        var osm = context.connection();
-	        if (!osm) { return; }
+	  var _fieldsArr;
 
-	        if (context.inIntro()) { return; }
+	  var _tags;
 
-	        if (context.history().hasChanges() &&
-	            !window.confirm(_t('source_switch.lose_changes'))) { return; }
+	  var _changesetID;
 
-	        var isLive = select(this)
-	            .classed('live');
+	  function changesetEditor(selection) {
+	    render(selection);
+	  }
 
-	        isLive = !isLive;
-	        context.enter(modeBrowse(context));
-	        context.history().clearSaved();          // remove saved history
-	        context.flush();                         // remove stored data
+	  function render(selection) {
+	    var initial = false;
 
-	        select(this)
-	            .text(isLive ? _t('source_switch.live') : _t('source_switch.dev'))
-	            .classed('live', isLive)
-	            .classed('chip', isLive);
+	    if (!_fieldsArr) {
+	      initial = true;
+	      var presets = _mainPresetIndex;
+	      _fieldsArr = [uiField(context, presets.field('comment'), null, {
+	        show: true,
+	        revert: false
+	      }), uiField(context, presets.field('source'), null, {
+	        show: false,
+	        revert: false
+	      }), uiField(context, presets.field('hashtags'), null, {
+	        show: false,
+	        revert: false
+	      })];
 
-	        osm.switch(isLive ? keys[0] : keys[1]);  // switch connection (warning: dispatches 'change' event)
+	      _fieldsArr.forEach(function (field) {
+	        field.on('change', function (t, onInput) {
+	          dispatch.call('change', field, undefined, t, onInput);
+	        });
+	      });
 	    }
 
-	    var sourceSwitch = function(selection) {
-	        selection
-	            .append('a')
-	            .attr('href', '#')
-	            .text(_t('source_switch.live'))
-	            .attr('class', 'live chip')
-	            .on('click', click);
-	    };
+	    _fieldsArr.forEach(function (field) {
+	      field.tags(_tags);
+	    });
 
+	    selection.call(formFields.fieldsArr(_fieldsArr));
+
+	    if (initial) {
+	      var commentField = selection.select('.form-field-comment textarea');
+	      var commentNode = commentField.node();
+
+	      if (commentNode) {
+	        commentNode.focus();
+	        commentNode.select();
+	      } // trigger a 'blur' event so that comment field can be cleaned
+	      // and checked for hashtags, even if retrieved from localstorage
+
+
+	      utilTriggerEvent(commentField, 'blur');
+	      var osm = context.connection();
+
+	      if (osm) {
+	        osm.userChangesets(function (err, changesets) {
+	          if (err) return;
+	          var comments = changesets.map(function (changeset) {
+	            var comment = changeset.tags.comment;
+	            return comment ? {
+	              title: comment,
+	              value: comment
+	            } : null;
+	          }).filter(Boolean);
+	          commentField.call(commentCombo.data(utilArrayUniqBy(comments, 'title')));
+	        });
+	      }
+	    } // Add warning if comment mentions Google
 
-	    sourceSwitch.keys = function(_) {
-	        if (!arguments.length) { return keys; }
-	        keys = _;
-	        return sourceSwitch;
-	    };
 
+	    var hasGoogle = _tags.comment.match(/google/i);
 
-	    return sourceSwitch;
-	}
+	    var commentWarning = selection.select('.form-field-comment').selectAll('.comment-warning').data(hasGoogle ? [0] : []);
+	    commentWarning.exit().transition().duration(200).style('opacity', 0).remove();
+	    var commentEnter = commentWarning.enter().insert('div', '.tag-reference-body').attr('class', 'field-warning comment-warning').style('opacity', 0);
+	    commentEnter.append('a').attr('target', '_blank').call(svgIcon('#iD-icon-alert', 'inline')).attr('href', _t('commit.google_warning_link')).append('span').html(_t.html('commit.google_warning'));
+	    commentEnter.transition().duration(200).style('opacity', 1);
+	  }
 
-	function uiSpinner(context) {
-	    var osm = context.connection();
+	  changesetEditor.tags = function (_) {
+	    if (!arguments.length) return _tags;
+	    _tags = _; // Don't reset _fieldsArr here.
 
+	    return changesetEditor;
+	  };
 
-	    return function(selection) {
-	        var img = selection
-	            .append('img')
-	            .attr('src', context.imagePath('loader-black.gif'))
-	            .style('opacity', 0);
+	  changesetEditor.changesetID = function (_) {
+	    if (!arguments.length) return _changesetID;
+	    if (_changesetID === _) return changesetEditor;
+	    _changesetID = _;
+	    _fieldsArr = null;
+	    return changesetEditor;
+	  };
 
-	        if (osm) {
-	            osm
-	                .on('loading.spinner', function() {
-	                    img.transition()
-	                        .style('opacity', 1);
-	                })
-	                .on('loaded.spinner', function() {
-	                    img.transition()
-	                        .style('opacity', 0);
-	                });
-	        }
-	    };
+	  return utilRebind(changesetEditor, dispatch, 'on');
 	}
 
-	function uiSplash(context) {
-	  return function (selection) {
-	    // Exception - if there are restorable changes, skip this splash screen.
-	    // This is because we currently only support one `uiModal` at a time
-	    //  and we need to show them `uiRestore`` instead of this one.
-	    if (context.history().hasRestorableChanges()) { return; }
+	function uiSectionChanges(context) {
+	  var detected = utilDetect();
+	  var _discardTags = {};
+	  _mainFileFetcher.get('discarded').then(function (d) {
+	    _discardTags = d;
+	  })["catch"](function () {
+	    /* ignore */
+	  });
+	  var section = uiSection('changes-list', context).label(function () {
+	    var history = context.history();
+	    var summary = history.difference().summary();
+	    return _t('inspector.title_count', {
+	      title: _t.html('commit.changes'),
+	      count: summary.length
+	    });
+	  }).disclosureContent(renderDisclosureContent);
 
-	    // If user has not seen this version of the privacy policy, show the splash again.
-	    var updateMessage = '';
-	    var sawPrivacyVersion = corePreferences('sawPrivacyVersion');
-	    var showSplash = !corePreferences('sawSplash');
-	    if (sawPrivacyVersion !== context.privacyVersion) {
-	      updateMessage = _t('splash.privacy_update');
-	      showSplash = true;
-	    }
+	  function renderDisclosureContent(selection) {
+	    var history = context.history();
+	    var summary = history.difference().summary();
+	    var container = selection.selectAll('.commit-section').data([0]);
+	    var containerEnter = container.enter().append('div').attr('class', 'commit-section');
+	    containerEnter.append('ul').attr('class', 'changeset-list');
+	    container = containerEnter.merge(container);
+	    var items = container.select('ul').selectAll('li').data(summary);
+	    var itemsEnter = items.enter().append('li').attr('class', 'change-item');
+	    var buttons = itemsEnter.append('button').on('mouseover', mouseover).on('mouseout', mouseout).on('click', click);
+	    buttons.each(function (d) {
+	      select(this).call(svgIcon('#iD-icon-' + d.entity.geometry(d.graph), 'pre-text ' + d.changeType));
+	    });
+	    buttons.append('span').attr('class', 'change-type').html(function (d) {
+	      return _t.html('commit.' + d.changeType) + ' ';
+	    });
+	    buttons.append('strong').attr('class', 'entity-type').html(function (d) {
+	      var matched = _mainPresetIndex.match(d.entity, d.graph);
+	      return matched && matched.name() || utilDisplayType(d.entity.id);
+	    });
+	    buttons.append('span').attr('class', 'entity-name').html(function (d) {
+	      var name = utilDisplayName(d.entity) || '',
+	          string = '';
 
-	    if (!showSplash) { return; }
+	      if (name !== '') {
+	        string += ':';
+	      }
 
-	    corePreferences('sawSplash', true);
-	    corePreferences('sawPrivacyVersion', context.privacyVersion);
+	      return string += ' ' + name;
+	    });
+	    items = itemsEnter.merge(items); // Download changeset link
 
-	    // fetch intro graph data now, while user is looking at the splash screen
-	    _mainFileFetcher.get('intro_graph');
+	    var changeset = new osmChangeset().update({
+	      id: undefined
+	    });
+	    var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
+	    delete changeset.id; // Export without chnageset_id
 
-	    var modalSelection = uiModal(selection);
+	    var data = JXON.stringify(changeset.osmChangeJXON(changes));
+	    var blob = new Blob([data], {
+	      type: 'text/xml;charset=utf-8;'
+	    });
+	    var fileName = 'changes.osc';
+	    var linkEnter = container.selectAll('.download-changes').data([0]).enter().append('a').attr('class', 'download-changes');
 
-	    modalSelection.select('.modal')
-	      .attr('class', 'modal-splash modal');
-
-	    var introModal = modalSelection.select('.content')
-	      .append('div')
-	      .attr('class', 'fillL');
-
-	    introModal
-	      .append('div')
-	      .attr('class','modal-section')
-	      .append('h3')
-	      .text(_t('splash.welcome'));
-
-	    var modalSection = introModal
-	      .append('div')
-	      .attr('class','modal-section');
-
-	    modalSection
-	      .append('p')
-	      .html(_t('splash.text', {
-	        version: context.version,
-	        website: '<a target="_blank" href="http://ideditor.blog/">ideditor.blog</a>',
-	        github: '<a target="_blank" href="https://github.com/openstreetmap/iD">github.com</a>'
-	      }));
+	    if (detected.download) {
+	      // All except IE11 and Edge
+	      linkEnter // download the data as a file
+	      .attr('href', window.URL.createObjectURL(blob)).attr('download', fileName);
+	    } else {
+	      // IE11 and Edge
+	      linkEnter // open data uri in a new tab
+	      .attr('target', '_blank').on('click.download', function () {
+	        navigator.msSaveBlob(blob, fileName);
+	      });
+	    }
 
-	    modalSection
-	      .append('p')
-	      .html(_t('splash.privacy', {
-	        updateMessage: updateMessage,
-	        privacyLink: '<a target="_blank" href="https://github.com/openstreetmap/iD/blob/release/PRIVACY.md">' +
-	          _t('splash.privacy_policy') + '</a>'
-	      }));
+	    linkEnter.call(svgIcon('#iD-icon-load', 'inline')).append('span').html(_t.html('commit.download_changes'));
 
-	    var buttonWrap = introModal
-	      .append('div')
-	      .attr('class', 'modal-actions');
+	    function mouseover(d) {
+	      if (d.entity) {
+	        context.surface().selectAll(utilEntityOrMemberSelector([d.entity.id], context.graph())).classed('hover', true);
+	      }
+	    }
 
-	    var walkthrough = buttonWrap
-	      .append('button')
-	      .attr('class', 'walkthrough')
-	      .on('click', function () {
-	        context.container().call(uiIntro(context));
-	        modalSelection.close();
-	      });
+	    function mouseout() {
+	      context.surface().selectAll('.hover').classed('hover', false);
+	    }
 
-	    walkthrough
-	      .append('svg')
-	      .attr('class', 'logo logo-walkthrough')
-	      .append('use')
-	      .attr('xlink:href', '#iD-logo-walkthrough');
+	    function click(d3_event, change) {
+	      if (change.changeType !== 'deleted') {
+	        var entity = change.entity;
+	        context.map().zoomToEase(entity);
+	        context.surface().selectAll(utilEntityOrMemberSelector([entity.id], context.graph())).classed('hover', true);
+	      }
+	    }
+	  }
 
-	    walkthrough
-	      .append('div')
-	      .text(_t('splash.walkthrough'));
+	  return section;
+	}
 
-	    var startEditing = buttonWrap
-	      .append('button')
-	      .attr('class', 'start-editing')
-	      .on('click', modalSelection.close);
+	function uiCommitWarnings(context) {
+	  function commitWarnings(selection) {
+	    var issuesBySeverity = context.validator().getIssuesBySeverity({
+	      what: 'edited',
+	      where: 'all',
+	      includeDisabledRules: true
+	    });
 
-	    startEditing
-	      .append('svg')
-	      .attr('class', 'logo logo-features')
-	      .append('use')
-	      .attr('xlink:href', '#iD-logo-features');
+	    for (var severity in issuesBySeverity) {
+	      var issues = issuesBySeverity[severity];
 
-	    startEditing
-	      .append('div')
-	      .text(_t('splash.start'));
+	      if (severity !== 'error') {
+	        // exclude 'fixme' and similar - #8603
+	        issues = issues.filter(function (issue) {
+	          return issue.type !== 'help_request';
+	        });
+	      }
 
-	    modalSelection.select('button.close')
-	      .attr('class','hide');
-	  };
-	}
+	      var section = severity + '-section';
+	      var issueItem = severity + '-item';
+	      var container = selection.selectAll('.' + section).data(issues.length ? [0] : []);
+	      container.exit().remove();
+	      var containerEnter = container.enter().append('div').attr('class', 'modal-section ' + section + ' fillL2');
+	      containerEnter.append('h3').html(severity === 'warning' ? _t.html('commit.warnings') : _t.html('commit.errors'));
+	      containerEnter.append('ul').attr('class', 'changeset-list');
+	      container = containerEnter.merge(container);
+	      var items = container.select('ul').selectAll('li').data(issues, function (d) {
+	        return d.key;
+	      });
+	      items.exit().remove();
+	      var itemsEnter = items.enter().append('li').attr('class', issueItem);
+	      var buttons = itemsEnter.append('button').on('mouseover', function (d3_event, d) {
+	        if (d.entityIds) {
+	          context.surface().selectAll(utilEntityOrMemberSelector(d.entityIds, context.graph())).classed('hover', true);
+	        }
+	      }).on('mouseout', function () {
+	        context.surface().selectAll('.hover').classed('hover', false);
+	      }).on('click', function (d3_event, d) {
+	        context.validator().focusIssue(d);
+	      });
+	      buttons.call(svgIcon('#iD-icon-alert', 'pre-text'));
+	      buttons.append('strong').attr('class', 'issue-message');
+	      buttons.filter(function (d) {
+	        return d.tooltip;
+	      }).call(uiTooltip().title(function (d) {
+	        return d.tooltip;
+	      }).placement('top'));
+	      items = itemsEnter.merge(items);
+	      items.selectAll('.issue-message').html(function (d) {
+	        return d.message(context);
+	      });
+	    }
+	  }
 
-	function uiStatus(context) {
-	    var osm = context.connection();
+	  return commitWarnings;
+	}
 
+	var readOnlyTags = [/^changesets_count$/, /^created_by$/, /^ideditor:/, /^imagery_used$/, /^host$/, /^locale$/, /^warnings:/, /^resolved:/, /^closed:note$/, /^closed:keepright$/, /^closed:improveosm:/, /^closed:osmose:/]; // treat most punctuation (except -, _, +, &) as hashtag delimiters - #4398
+	// from https://stackoverflow.com/a/25575009
 
-	    return function(selection) {
-	        if (!osm) { return; }
+	var hashtagRegex = /(#[^\u2000-\u206F\u2E00-\u2E7F\s\\'!"#$%()*,.\/:;<=>?@\[\]^`{|}~]+)/g;
+	function uiCommit(context) {
+	  var dispatch = dispatch$8('cancel');
 
-	        function update(err, apiStatus) {
-	            selection.html('');
+	  var _userDetails;
 
-	            if (err) {
-	                if (apiStatus === 'connectionSwitched') {
-	                    // if the connection was just switched, we can't rely on
-	                    // the status (we're getting the status of the previous api)
-	                    return;
-
-	                } else if (apiStatus === 'rateLimited') {
-	                    selection
-	                        .text(_t('osm_api_status.message.rateLimit'))
-	                        .append('a')
-	                        .attr('class', 'api-status-login')
-	                        .attr('target', '_blank')
-	                        .call(svgIcon('#iD-icon-out-link', 'inline'))
-	                        .append('span')
-	                        .text(_t('login'))
-	                        .on('click.login', function() {
-	                            event.preventDefault();
-	                            osm.authenticate();
-	                        });
-	                } else {
+	  var _selection;
 
-	                    // don't allow retrying too rapidly
-	                    var throttledRetry = throttle(function() {
-	                        // try loading the visible tiles
-	                        context.loadTiles(context.projection);
-	                        // manually reload the status too in case all visible tiles were already loaded
-	                        osm.reloadApiStatus();
-	                    }, 2000);
-
-	                    // eslint-disable-next-line no-warning-comments
-	                    // TODO: nice messages for different error types
-	                    selection
-	                        .text(_t('osm_api_status.message.error') + ' ')
-	                        .append('a')
-	                        // let the user manually retry their connection directly
-	                        .text(_t('osm_api_status.retry'))
-	                        .on('click.retry', function() {
-	                            event.preventDefault();
-	                            throttledRetry();
-	                        });
-	                }
+	  var changesetEditor = uiChangesetEditor(context).on('change', changeTags);
+	  var rawTagEditor = uiSectionRawTagEditor('changeset-tag-editor', context).on('change', changeTags).readOnlyTags(readOnlyTags);
+	  var commitChanges = uiSectionChanges(context);
+	  var commitWarnings = uiCommitWarnings(context);
 
-	            } else if (apiStatus === 'readonly') {
-	                selection.text(_t('osm_api_status.message.readonly'));
-	            } else if (apiStatus === 'offline') {
-	                selection.text(_t('osm_api_status.message.offline'));
-	            }
+	  function commit(selection) {
+	    _selection = selection; // Initialize changeset if one does not exist yet.
 
-	            selection.attr('class', 'api-status ' + (err ? 'error' : apiStatus));
-	        }
+	    if (!context.changeset) initChangeset();
+	    loadDerivedChangesetTags();
+	    selection.call(render);
+	  }
 
-	        osm.on('apiStatusChange.uiStatus', update);
+	  function initChangeset() {
+	    // expire stored comment, hashtags, source after cutoff datetime - #3947 #4899
+	    var commentDate = +corePreferences('commentDate') || 0;
+	    var currDate = Date.now();
+	    var cutoff = 2 * 86400 * 1000; // 2 days
 
-	        // reload the status periodically regardless of other factors
-	        window.setInterval(function() {
-	            osm.reloadApiStatus();
-	        }, 90000);
+	    if (commentDate > currDate || currDate - commentDate > cutoff) {
+	      corePreferences('comment', null);
+	      corePreferences('hashtags', null);
+	      corePreferences('source', null);
+	    } // load in explicitly-set values, if any
 
-	        // load the initial status in case no OSM data was loaded yet
-	        osm.reloadApiStatus();
-	    };
-	}
 
-	function modeDrawArea(context, wayID, startGraph, button) {
-	    var mode = {
-	        button: button,
-	        id: 'draw-area'
-	    };
+	    if (context.defaultChangesetComment()) {
+	      corePreferences('comment', context.defaultChangesetComment());
+	      corePreferences('commentDate', Date.now());
+	    }
 
-	    var behavior = behaviorDrawWay(context, wayID, mode, startGraph)
-	        .on('rejectedSelfIntersection.modeDrawArea', function() {
-	            context.ui().flash
-	                .text(_t('self_intersection.error.areas'))();
-	        });
+	    if (context.defaultChangesetSource()) {
+	      corePreferences('source', context.defaultChangesetSource());
+	      corePreferences('commentDate', Date.now());
+	    }
 
-	    mode.wayID = wayID;
+	    if (context.defaultChangesetHashtags()) {
+	      corePreferences('hashtags', context.defaultChangesetHashtags());
+	      corePreferences('commentDate', Date.now());
+	    }
 
-	    mode.enter = function() {
-	        context.install(behavior);
-	    };
+	    var detected = utilDetect();
+	    var tags = {
+	      comment: corePreferences('comment') || '',
+	      created_by: context.cleanTagValue('iD ' + context.version),
+	      host: context.cleanTagValue(detected.host),
+	      locale: context.cleanTagValue(_mainLocalizer.localeCode())
+	    }; // call findHashtags initially - this will remove stored
+	    // hashtags if any hashtags are found in the comment - #4304
 
-	    mode.exit = function() {
-	        context.uninstall(behavior);
-	    };
+	    findHashtags(tags, true);
+	    var hashtags = corePreferences('hashtags');
 
-	    mode.selectedIDs = function() {
-	        return [wayID];
-	    };
+	    if (hashtags) {
+	      tags.hashtags = hashtags;
+	    }
 
-	    mode.activeID = function() {
-	        return (behavior && behavior.activeID()) || [];
-	    };
+	    var source = corePreferences('source');
 
-	    return mode;
-	}
+	    if (source) {
+	      tags.source = source;
+	    }
 
-	function modeAddArea(context, mode) {
-	    mode.id = 'add-area';
+	    var photoOverlaysUsed = context.history().photoOverlaysUsed();
 
-	    var behavior = behaviorAddWay(context)
-	        .on('start', start)
-	        .on('startFromWay', startFromWay)
-	        .on('startFromNode', startFromNode);
+	    if (photoOverlaysUsed.length) {
+	      var sources = (tags.source || '').split(';'); // include this tag for any photo layer
 
-	    var defaultTags = { area: 'yes' };
-	    if (mode.preset) { defaultTags = mode.preset.setTags(defaultTags, 'area'); }
+	      if (sources.indexOf('streetlevel imagery') === -1) {
+	        sources.push('streetlevel imagery');
+	      } // add the photo overlays used during editing as sources
 
 
-	    function actionClose(wayId) {
-	        return function (graph) {
-	            return graph.replace(graph.entity(wayId).close());
-	        };
+	      photoOverlaysUsed.forEach(function (photoOverlay) {
+	        if (sources.indexOf(photoOverlay) === -1) {
+	          sources.push(photoOverlay);
+	        }
+	      });
+	      tags.source = context.cleanTagValue(sources.join(';'));
 	    }
 
+	    context.changeset = new osmChangeset({
+	      tags: tags
+	    });
+	  } // Calculates read-only metadata tags based on the user's editing session and applies
+	  // them to the changeset.
 
-	    function start(loc) {
-	        var startGraph = context.graph();
-	        var node = osmNode({ loc: loc });
-	        var way = osmWay({ tags: defaultTags });
 
-	        context.perform(
-	            actionAddEntity(node),
-	            actionAddEntity(way),
-	            actionAddVertex(way.id, node.id),
-	            actionClose(way.id)
-	        );
+	  function loadDerivedChangesetTags() {
+	    var osm = context.connection();
+	    if (!osm) return;
+	    var tags = Object.assign({}, context.changeset.tags); // shallow copy
+	    // assign tags for imagery used
+
+	    var imageryUsed = context.cleanTagValue(context.history().imageryUsed().join(';'));
+	    tags.imagery_used = imageryUsed || 'None'; // assign tags for closed issues and notes
 
-	        context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
+	    var osmClosed = osm.getClosedIDs();
+	    var itemType;
+
+	    if (osmClosed.length) {
+	      tags['closed:note'] = context.cleanTagValue(osmClosed.join(';'));
 	    }
 
+	    if (services.keepRight) {
+	      var krClosed = services.keepRight.getClosedIDs();
 
-	    function startFromWay(loc, edge) {
-	        var startGraph = context.graph();
-	        var node = osmNode({ loc: loc });
-	        var way = osmWay({ tags: defaultTags });
+	      if (krClosed.length) {
+	        tags['closed:keepright'] = context.cleanTagValue(krClosed.join(';'));
+	      }
+	    }
 
-	        context.perform(
-	            actionAddEntity(node),
-	            actionAddEntity(way),
-	            actionAddVertex(way.id, node.id),
-	            actionClose(way.id),
-	            actionAddMidpoint({ loc: loc, edge: edge }, node)
-	        );
+	    if (services.improveOSM) {
+	      var iOsmClosed = services.improveOSM.getClosedCounts();
 
-	        context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
+	      for (itemType in iOsmClosed) {
+	        tags['closed:improveosm:' + itemType] = context.cleanTagValue(iOsmClosed[itemType].toString());
+	      }
 	    }
 
+	    if (services.osmose) {
+	      var osmoseClosed = services.osmose.getClosedCounts();
 
-	    function startFromNode(node) {
-	        var startGraph = context.graph();
-	        var way = osmWay({ tags: defaultTags });
+	      for (itemType in osmoseClosed) {
+	        tags['closed:osmose:' + itemType] = context.cleanTagValue(osmoseClosed[itemType].toString());
+	      }
+	    } // remove existing issue counts
 
-	        context.perform(
-	            actionAddEntity(way),
-	            actionAddVertex(way.id, node.id),
-	            actionClose(way.id)
-	        );
 
-	        context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
+	    for (var key in tags) {
+	      if (key.match(/(^warnings:)|(^resolved:)/)) {
+	        delete tags[key];
+	      }
 	    }
 
+	    function addIssueCounts(issues, prefix) {
+	      var issuesByType = utilArrayGroupBy(issues, 'type');
 
-	    mode.enter = function() {
-	        context.install(behavior);
-	    };
+	      for (var issueType in issuesByType) {
+	        var issuesOfType = issuesByType[issueType];
 
+	        if (issuesOfType[0].subtype) {
+	          var issuesBySubtype = utilArrayGroupBy(issuesOfType, 'subtype');
 
-	    mode.exit = function() {
-	        context.uninstall(behavior);
-	    };
+	          for (var issueSubtype in issuesBySubtype) {
+	            var issuesOfSubtype = issuesBySubtype[issueSubtype];
+	            tags[prefix + ':' + issueType + ':' + issueSubtype] = context.cleanTagValue(issuesOfSubtype.length.toString());
+	          }
+	        } else {
+	          tags[prefix + ':' + issueType] = context.cleanTagValue(issuesOfType.length.toString());
+	        }
+	      }
+	    } // add counts of warnings generated by the user's edits
 
 
-	    return mode;
-	}
+	    var warnings = context.validator().getIssuesBySeverity({
+	      what: 'edited',
+	      where: 'all',
+	      includeIgnored: true,
+	      includeDisabledRules: true
+	    }).warning.filter(function (issue) {
+	      return issue.type !== 'help_request';
+	    }); // exclude 'fixme' and similar - #8603
 
-	function modeAddLine(context, mode) {
-	    mode.id = 'add-line';
+	    addIssueCounts(warnings, 'warnings'); // add counts of issues resolved by the user's edits
 
-	    var behavior = behaviorAddWay(context)
-	        .on('start', start)
-	        .on('startFromWay', startFromWay)
-	        .on('startFromNode', startFromNode);
+	    var resolvedIssues = context.validator().getResolvedIssues();
+	    addIssueCounts(resolvedIssues, 'resolved');
+	    context.changeset = context.changeset.update({
+	      tags: tags
+	    });
+	  }
 
-	    var defaultTags = {};
-	    if (mode.preset) { defaultTags = mode.preset.setTags(defaultTags, 'line'); }
+	  function render(selection) {
+	    var osm = context.connection();
+	    if (!osm) return;
+	    var header = selection.selectAll('.header').data([0]);
+	    var headerTitle = header.enter().append('div').attr('class', 'header fillL');
+	    headerTitle.append('div').append('h3').html(_t.html('commit.title'));
+	    headerTitle.append('button').attr('class', 'close').on('click', function () {
+	      dispatch.call('cancel', this);
+	    }).call(svgIcon('#iD-icon-close'));
+	    var body = selection.selectAll('.body').data([0]);
+	    body = body.enter().append('div').attr('class', 'body').merge(body); // Changeset Section
 
+	    var changesetSection = body.selectAll('.changeset-editor').data([0]);
+	    changesetSection = changesetSection.enter().append('div').attr('class', 'modal-section changeset-editor').merge(changesetSection);
+	    changesetSection.call(changesetEditor.changesetID(context.changeset.id).tags(context.changeset.tags)); // Warnings
 
-	    function start(loc) {
-	        var startGraph = context.graph();
-	        var node = osmNode({ loc: loc });
-	        var way = osmWay({ tags: defaultTags });
+	    body.call(commitWarnings); // Upload Explanation
 
-	        context.perform(
-	            actionAddEntity(node),
-	            actionAddEntity(way),
-	            actionAddVertex(way.id, node.id)
-	        );
+	    var saveSection = body.selectAll('.save-section').data([0]);
+	    saveSection = saveSection.enter().append('div').attr('class', 'modal-section save-section fillL').merge(saveSection);
+	    var prose = saveSection.selectAll('.commit-info').data([0]);
 
-	        context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
+	    if (prose.enter().size()) {
+	      // first time, make sure to update user details in prose
+	      _userDetails = null;
 	    }
 
+	    prose = prose.enter().append('p').attr('class', 'commit-info').html(_t.html('commit.upload_explanation')).merge(prose); // always check if this has changed, but only update prose.html()
+	    // if needed, because it can trigger a style recalculation
 
-	    function startFromWay(loc, edge) {
-	        var startGraph = context.graph();
-	        var node = osmNode({ loc: loc });
-	        var way = osmWay({ tags: defaultTags });
+	    osm.userDetails(function (err, user) {
+	      if (err) return;
+	      if (_userDetails === user) return; // no change
 
-	        context.perform(
-	            actionAddEntity(node),
-	            actionAddEntity(way),
-	            actionAddVertex(way.id, node.id),
-	            actionAddMidpoint({ loc: loc, edge: edge }, node)
-	        );
+	      _userDetails = user;
+	      var userLink = select(document.createElement('div'));
 
-	        context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
-	    }
+	      if (user.image_url) {
+	        userLink.append('img').attr('src', user.image_url).attr('class', 'icon pre-text user-icon');
+	      }
 
+	      userLink.append('a').attr('class', 'user-info').html(user.display_name).attr('href', osm.userURL(user.display_name)).attr('target', '_blank');
+	      prose.html(_t.html('commit.upload_explanation_with_user', {
+	        user: userLink.html()
+	      }));
+	    }); // Request Review
 
-	    function startFromNode(node) {
-	        var startGraph = context.graph();
-	        var way = osmWay({ tags: defaultTags });
+	    var requestReview = saveSection.selectAll('.request-review').data([0]); // Enter
 
-	        context.perform(
-	            actionAddEntity(way),
-	            actionAddVertex(way.id, node.id)
-	        );
+	    var requestReviewEnter = requestReview.enter().append('div').attr('class', 'request-review');
+	    var requestReviewDomId = utilUniqueDomId('commit-input-request-review');
+	    var labelEnter = requestReviewEnter.append('label').attr('for', requestReviewDomId);
 
-	        context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
+	    if (!labelEnter.empty()) {
+	      labelEnter.call(uiTooltip().title(_t.html('commit.request_review_info')).placement('top'));
 	    }
 
+	    labelEnter.append('input').attr('type', 'checkbox').attr('id', requestReviewDomId);
+	    labelEnter.append('span').html(_t.html('commit.request_review')); // Update
 
-	    mode.enter = function() {
-	        context.install(behavior);
-	    };
+	    requestReview = requestReview.merge(requestReviewEnter);
+	    var requestReviewInput = requestReview.selectAll('input').property('checked', isReviewRequested(context.changeset.tags)).on('change', toggleRequestReview); // Buttons
 
+	    var buttonSection = saveSection.selectAll('.buttons').data([0]); // enter
 
-	    mode.exit = function() {
-	        context.uninstall(behavior);
-	    };
+	    var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons fillL');
+	    buttonEnter.append('button').attr('class', 'secondary-action button cancel-button').append('span').attr('class', 'label').html(_t.html('commit.cancel'));
+	    var uploadButton = buttonEnter.append('button').attr('class', 'action button save-button');
+	    uploadButton.append('span').attr('class', 'label').html(_t.html('commit.save'));
+	    var uploadBlockerTooltipText = getUploadBlockerMessage(); // update
 
-	    return mode;
-	}
+	    buttonSection = buttonSection.merge(buttonEnter);
+	    buttonSection.selectAll('.cancel-button').on('click.cancel', function () {
+	      dispatch.call('cancel', this);
+	    });
+	    buttonSection.selectAll('.save-button').classed('disabled', uploadBlockerTooltipText !== null).on('click.save', function () {
+	      if (!select(this).classed('disabled')) {
+	        this.blur(); // avoid keeping focus on the button - #4641
 
-	function modeAddPoint(context, mode) {
+	        for (var key in context.changeset.tags) {
+	          // remove any empty keys before upload
+	          if (!key) delete context.changeset.tags[key];
+	        }
 
-	    mode.id = 'add-point';
+	        context.uploader().save(context.changeset);
+	      }
+	    }); // remove any existing tooltip
 
-	    var behavior = behaviorDraw(context)
-	        .on('click', add)
-	        .on('clickWay', addWay)
-	        .on('clickNode', addNode)
-	        .on('cancel', cancel)
-	        .on('finish', cancel);
+	    uiTooltip().destroyAny(buttonSection.selectAll('.save-button'));
 
-	    var defaultTags = {};
-	    if (mode.preset) { defaultTags = mode.preset.setTags(defaultTags, 'point'); }
+	    if (uploadBlockerTooltipText) {
+	      buttonSection.selectAll('.save-button').call(uiTooltip().title(uploadBlockerTooltipText).placement('top'));
+	    } // Raw Tag Editor
 
 
-	    function add(loc) {
-	        var node = osmNode({ loc: loc, tags: defaultTags });
+	    var tagSection = body.selectAll('.tag-section.raw-tag-editor').data([0]);
+	    tagSection = tagSection.enter().append('div').attr('class', 'modal-section tag-section raw-tag-editor').merge(tagSection);
+	    tagSection.call(rawTagEditor.tags(Object.assign({}, context.changeset.tags)) // shallow copy
+	    .render);
+	    var changesSection = body.selectAll('.commit-changes-section').data([0]);
+	    changesSection = changesSection.enter().append('div').attr('class', 'modal-section commit-changes-section').merge(changesSection); // Change summary
 
-	        context.perform(
-	            actionAddEntity(node),
-	            _t('operations.add.annotation.point')
-	        );
+	    changesSection.call(commitChanges.render);
 
-	        enterSelectMode(node);
+	    function toggleRequestReview() {
+	      var rr = requestReviewInput.property('checked');
+	      updateChangeset({
+	        review_requested: rr ? 'yes' : undefined
+	      });
+	      tagSection.call(rawTagEditor.tags(Object.assign({}, context.changeset.tags)) // shallow copy
+	      .render);
 	    }
+	  }
 
+	  function getUploadBlockerMessage() {
+	    var errors = context.validator().getIssuesBySeverity({
+	      what: 'edited',
+	      where: 'all'
+	    }).error;
 
-	    function addWay(loc, edge) {
-	        var node = osmNode({ tags: defaultTags });
-
-	        context.perform(
-	            actionAddMidpoint({loc: loc, edge: edge}, node),
-	            _t('operations.add.annotation.vertex')
-	        );
+	    if (errors.length) {
+	      return _t('commit.outstanding_errors_message', {
+	        count: errors.length
+	      });
+	    } else {
+	      var hasChangesetComment = context.changeset && context.changeset.tags.comment && context.changeset.tags.comment.trim().length;
 
-	        enterSelectMode(node);
+	      if (!hasChangesetComment) {
+	        return _t('commit.comment_needed_message');
+	      }
 	    }
 
-	    function enterSelectMode(node) {
-	        context.enter(
-	            modeSelect(context, [node.id]).newFeature(true)
-	        );
-	    }
+	    return null;
+	  }
+
+	  function changeTags(_, changed, onInput) {
+	    if (changed.hasOwnProperty('comment')) {
+	      if (changed.comment === undefined) {
+	        changed.comment = '';
+	      }
 
+	      if (!onInput) {
+	        corePreferences('comment', changed.comment);
+	        corePreferences('commentDate', Date.now());
+	      }
+	    }
 
-	    function addNode(node) {
-	        if (Object.keys(defaultTags).length === 0) {
-	            enterSelectMode(node);
-	            return;
-	        }
+	    if (changed.hasOwnProperty('source')) {
+	      if (changed.source === undefined) {
+	        corePreferences('source', null);
+	      } else if (!onInput) {
+	        corePreferences('source', changed.source);
+	        corePreferences('commentDate', Date.now());
+	      }
+	    } // no need to update `prefs` for `hashtags` here since it's done in `updateChangeset`
 
-	        var tags = Object.assign({}, node.tags);  // shallow copy
-	        for (var key in defaultTags) {
-	            tags[key] = defaultTags[key];
-	        }
 
-	        context.perform(
-	            actionChangeTags(node.id, tags),
-	            _t('operations.add.annotation.point')
-	        );
+	    updateChangeset(changed, onInput);
 
-	        enterSelectMode(node);
+	    if (_selection) {
+	      _selection.call(render);
 	    }
+	  }
 
+	  function findHashtags(tags, commentOnly) {
+	    var detectedHashtags = commentHashtags();
 
-	    function cancel() {
-	        context.enter(modeBrowse(context));
+	    if (detectedHashtags.length) {
+	      // always remove stored hashtags if there are hashtags in the comment - #4304
+	      corePreferences('hashtags', null);
 	    }
 
+	    if (!detectedHashtags.length || !commentOnly) {
+	      detectedHashtags = detectedHashtags.concat(hashtagHashtags());
+	    }
 
-	    mode.enter = function() {
-	        context.install(behavior);
-	    };
-
+	    var allLowerCase = new Set();
+	    return detectedHashtags.filter(function (hashtag) {
+	      // Compare tags as lowercase strings, but keep original case tags
+	      var lowerCase = hashtag.toLowerCase();
 
-	    mode.exit = function() {
-	        context.uninstall(behavior);
-	    };
+	      if (!allLowerCase.has(lowerCase)) {
+	        allLowerCase.add(lowerCase);
+	        return true;
+	      }
 
+	      return false;
+	    }); // Extract hashtags from `comment`
 
-	    return mode;
-	}
+	    function commentHashtags() {
+	      var matches = (tags.comment || '').replace(/http\S*/g, '') // drop anything that looks like a URL - #4289
+	      .match(hashtagRegex);
+	      return matches || [];
+	    } // Extract and clean hashtags from `hashtags`
 
-	function modeAddNote(context) {
-	    var mode = {
-	        id: 'add-note',
-	        button: 'note',
-	        title: _t('modes.add_note.title'),
-	        description: _t('modes.add_note.description'),
-	        key: _t('modes.add_note.key')
-	    };
 
-	    var behavior = behaviorDraw(context)
-	        .on('click', add)
-	        .on('cancel', cancel)
-	        .on('finish', cancel);
+	    function hashtagHashtags() {
+	      var matches = (tags.hashtags || '').split(/[,;\s]+/).map(function (s) {
+	        if (s[0] !== '#') {
+	          s = '#' + s;
+	        } // prepend '#'
 
 
-	    function add(loc) {
-	        var osm = services.osm;
-	        if (!osm) { return; }
+	        var matched = s.match(hashtagRegex);
+	        return matched && matched[0];
+	      }).filter(Boolean); // exclude falsy
 
-	        var note = osmNote({ loc: loc, status: 'open', comments: [] });
-	        osm.replaceNote(note);
+	      return matches || [];
+	    }
+	  }
 
-	        // force a reraw (there is no history change that would otherwise do this)
-	        context.map().pan([0,0]);
+	  function isReviewRequested(tags) {
+	    var rr = tags.review_requested;
+	    if (rr === undefined) return false;
+	    rr = rr.trim().toLowerCase();
+	    return !(rr === '' || rr === 'no');
+	  }
 
-	        context
-	            .selectedNoteID(note.id)
-	            .enter(modeSelectNote(context, note.id).newFeature(true));
-	    }
+	  function updateChangeset(changed, onInput) {
+	    var tags = Object.assign({}, context.changeset.tags); // shallow copy
 
+	    Object.keys(changed).forEach(function (k) {
+	      var v = changed[k];
+	      k = context.cleanTagKey(k);
+	      if (readOnlyTags.indexOf(k) !== -1) return;
 
-	    function cancel() {
-	        context.enter(modeBrowse(context));
-	    }
+	      if (v === undefined) {
+	        delete tags[k];
+	      } else if (onInput) {
+	        tags[k] = v;
+	      } else {
+	        tags[k] = context.cleanTagValue(v);
+	      }
+	    });
 
+	    if (!onInput) {
+	      // when changing the comment, override hashtags with any found in comment.
+	      var commentOnly = changed.hasOwnProperty('comment') && changed.comment !== '';
+	      var arr = findHashtags(tags, commentOnly);
 
-	    mode.enter = function() {
-	        context.install(behavior);
-	    };
+	      if (arr.length) {
+	        tags.hashtags = context.cleanTagValue(arr.join(';'));
+	        corePreferences('hashtags', tags.hashtags);
+	      } else {
+	        delete tags.hashtags;
+	        corePreferences('hashtags', null);
+	      }
+	    } // always update userdetails, just in case user reauthenticates as someone else
 
 
-	    mode.exit = function() {
-	        context.uninstall(behavior);
-	    };
+	    if (_userDetails && _userDetails.changesets_count !== undefined) {
+	      var changesetsCount = parseInt(_userDetails.changesets_count, 10) + 1; // #4283
 
+	      tags.changesets_count = String(changesetsCount); // first 100 edits - new user
 
-	    return mode;
-	}
+	      if (changesetsCount <= 100) {
+	        var s;
+	        s = corePreferences('walkthrough_completed');
 
-	function uiConflicts(context) {
-	    var dispatch$1 = dispatch('cancel', 'save');
-	    var keybinding = utilKeybinding('conflicts');
-	    var _origChanges;
-	    var _conflictList;
-	    var _shownConflictIndex;
+	        if (s) {
+	          tags['ideditor:walkthrough_completed'] = s;
+	        }
 
+	        s = corePreferences('walkthrough_progress');
 
-	    function keybindingOn() {
-	        select(document)
-	            .call(keybinding.on('⎋', cancel, true));
-	    }
+	        if (s) {
+	          tags['ideditor:walkthrough_progress'] = s;
+	        }
 
-	    function keybindingOff() {
-	        select(document)
-	            .call(keybinding.unbind);
-	    }
+	        s = corePreferences('walkthrough_started');
 
-	    function tryAgain() {
-	        keybindingOff();
-	        dispatch$1.call('save');
+	        if (s) {
+	          tags['ideditor:walkthrough_started'] = s;
+	        }
+	      }
+	    } else {
+	      delete tags.changesets_count;
 	    }
 
-	    function cancel() {
-	        keybindingOff();
-	        dispatch$1.call('cancel');
+	    if (!fastDeepEqual(context.changeset.tags, tags)) {
+	      context.changeset = context.changeset.update({
+	        tags: tags
+	      });
 	    }
+	  }
 
+	  commit.reset = function () {
+	    context.changeset = null;
+	  };
 
-	    function conflicts(selection) {
-	        keybindingOn();
+	  return utilRebind(commit, dispatch, 'on');
+	}
 
-	        var headerEnter = selection.selectAll('.header')
-	            .data([0])
-	            .enter()
-	            .append('div')
-	            .attr('class', 'header fillL');
+	// for punction see https://stackoverflow.com/a/21224179
 
-	        headerEnter
-	            .append('button')
-	            .attr('class', 'fr')
-	            .on('click', cancel)
-	            .call(svgIcon('#iD-icon-close'));
+	function simplify(str) {
+	  if (typeof str !== 'string') return '';
+	  return diacritics.remove(str.replace(/&/g, 'and').replace(/İ/ig, 'i').replace(/[\s\-=_!"#%'*{},.\/:;?\(\)\[\]@\\$\^*+<>«»~`’\u00a1\u00a7\u00b6\u00b7\u00bf\u037e\u0387\u055a-\u055f\u0589\u05c0\u05c3\u05c6\u05f3\u05f4\u0609\u060a\u060c\u060d\u061b\u061e\u061f\u066a-\u066d\u06d4\u0700-\u070d\u07f7-\u07f9\u0830-\u083e\u085e\u0964\u0965\u0970\u0af0\u0df4\u0e4f\u0e5a\u0e5b\u0f04-\u0f12\u0f14\u0f85\u0fd0-\u0fd4\u0fd9\u0fda\u104a-\u104f\u10fb\u1360-\u1368\u166d\u166e\u16eb-\u16ed\u1735\u1736\u17d4-\u17d6\u17d8-\u17da\u1800-\u1805\u1807-\u180a\u1944\u1945\u1a1e\u1a1f\u1aa0-\u1aa6\u1aa8-\u1aad\u1b5a-\u1b60\u1bfc-\u1bff\u1c3b-\u1c3f\u1c7e\u1c7f\u1cc0-\u1cc7\u1cd3\u200b-\u200f\u2016\u2017\u2020-\u2027\u2030-\u2038\u203b-\u203e\u2041-\u2043\u2047-\u2051\u2053\u2055-\u205e\u2cf9-\u2cfc\u2cfe\u2cff\u2d70\u2e00\u2e01\u2e06-\u2e08\u2e0b\u2e0e-\u2e16\u2e18\u2e19\u2e1b\u2e1e\u2e1f\u2e2a-\u2e2e\u2e30-\u2e39\u3001-\u3003\u303d\u30fb\ua4fe\ua4ff\ua60d-\ua60f\ua673\ua67e\ua6f2-\ua6f7\ua874-\ua877\ua8ce\ua8cf\ua8f8-\ua8fa\ua92e\ua92f\ua95f\ua9c1-\ua9cd\ua9de\ua9df\uaa5c-\uaa5f\uaade\uaadf\uaaf0\uaaf1\uabeb\ufe10-\ufe16\ufe19\ufe30\ufe45\ufe46\ufe49-\ufe4c\ufe50-\ufe52\ufe54-\ufe57\ufe5f-\ufe61\ufe68\ufe6a\ufe6b\ufeff\uff01-\uff03\uff05-\uff07\uff0a\uff0c\uff0e\uff0f\uff1a\uff1b\uff1f\uff20\uff3c\uff61\uff64\uff65]+/g, '').toLowerCase());
+	}
 
-	        headerEnter
-	            .append('h3')
-	            .text(_t('save.conflict.header'));
+	// `resolveStrings`
+	// Resolves the text strings for a given community index item
+	//
+	// Arguments
+	//   `item`:  Object containing the community index item
+	//   `defaults`: Object containing the community index default strings
+	//   `localizerFn?`: optional function we will call to do the localization.
+	//      This function should be like the iD `t()` function that
+	//      accepts a `stringID` and returns a localized string
+	//
+	// Returns
+	//   An Object containing all the resolved strings:
+	//   {
+	//     name:                     'talk-ru Mailing List',
+	//     url:                      'https://lists.openstreetmap.org/listinfo/talk-ru',
+	//     signupUrl:                'https://example.url/signup',
+	//     description:              'A one line description',
+	//     extendedDescription:      'Extended description',
+	//     nameHTML:                 '<a href="the url">the name</a>',
+	//     urlHTML:                  '<a href="the url">the url</a>',
+	//     signupUrlHTML:            '<a href="the signupUrl">the signupUrl</a>',
+	//     descriptionHTML:          the description, with urls and signupUrls linkified,
+	//     extendedDescriptionHTML:  the extendedDescription with urls and signupUrls linkified
+	//   }
+	//
 
-	        var bodyEnter = selection.selectAll('.body')
-	            .data([0])
-	            .enter()
-	            .append('div')
-	            .attr('class', 'body fillL');
+	function resolveStrings(item, defaults, localizerFn) {
+	  var itemStrings = Object.assign({}, item.strings); // shallow clone
 
-	        var conflictsHelpEnter = bodyEnter
-	            .append('div')
-	            .attr('class', 'conflicts-help')
-	            .text(_t('save.conflict.help'));
+	  var defaultStrings = Object.assign({}, defaults[item.type]); // shallow clone
 
+	  var anyToken = new RegExp(/(\{\w+\})/, 'gi'); // Pre-localize the item and default strings
 
-	        // Download changes link
-	        var detected = utilDetect();
-	        var changeset = new osmChangeset();
+	  if (localizerFn) {
+	    if (itemStrings.community) {
+	      var communityID = simplify(itemStrings.community);
+	      itemStrings.community = localizerFn("_communities.".concat(communityID));
+	    }
 
-	        delete changeset.id;  // Export without changeset_id
+	    ['name', 'description', 'extendedDescription'].forEach(function (prop) {
+	      if (defaultStrings[prop]) defaultStrings[prop] = localizerFn("_defaults.".concat(item.type, ".").concat(prop));
+	      if (itemStrings[prop]) itemStrings[prop] = localizerFn("".concat(item.id, ".").concat(prop));
+	    });
+	  }
 
-	        var data = JXON.stringify(changeset.osmChangeJXON(_origChanges));
-	        var blob = new Blob([data], { type: 'text/xml;charset=utf-8;' });
-	        var fileName = 'changes.osc';
+	  var replacements = {
+	    account: item.account,
+	    community: itemStrings.community,
+	    signupUrl: itemStrings.signupUrl,
+	    url: itemStrings.url
+	  }; // Resolve URLs first (which may refer to {account})
 
-	        var linkEnter = conflictsHelpEnter.selectAll('.download-changes')
-	            .append('a')
-	            .attr('class', 'download-changes');
+	  if (!replacements.signupUrl) {
+	    replacements.signupUrl = resolve(itemStrings.signupUrl || defaultStrings.signupUrl);
+	  }
 
-	        if (detected.download) {      // All except IE11 and Edge
-	            linkEnter                 // download the data as a file
-	                .attr('href', window.URL.createObjectURL(blob))
-	                .attr('download', fileName);
+	  if (!replacements.url) {
+	    replacements.url = resolve(itemStrings.url || defaultStrings.url);
+	  }
 
-	        } else {                      // IE11 and Edge
-	            linkEnter                 // open data uri in a new tab
-	                .attr('target', '_blank')
-	                .on('click.download', function() {
-	                    navigator.msSaveBlob(blob, fileName);
-	                });
-	        }
+	  var resolved = {
+	    name: resolve(itemStrings.name || defaultStrings.name),
+	    url: resolve(itemStrings.url || defaultStrings.url),
+	    signupUrl: resolve(itemStrings.signupUrl || defaultStrings.signupUrl),
+	    description: resolve(itemStrings.description || defaultStrings.description),
+	    extendedDescription: resolve(itemStrings.extendedDescription || defaultStrings.extendedDescription)
+	  }; // Generate linkified strings
 
-	        linkEnter
-	            .call(svgIcon('#iD-icon-load', 'inline'))
-	            .append('span')
-	            .text(_t('save.conflict.download_changes'));
+	  resolved.nameHTML = linkify(resolved.url, resolved.name);
+	  resolved.urlHTML = linkify(resolved.url);
+	  resolved.signupUrlHTML = linkify(resolved.signupUrl);
+	  resolved.descriptionHTML = resolve(itemStrings.description || defaultStrings.description, true);
+	  resolved.extendedDescriptionHTML = resolve(itemStrings.extendedDescription || defaultStrings.extendedDescription, true);
+	  return resolved;
 
+	  function resolve(s, addLinks) {
+	    if (!s) return undefined;
+	    var result = s;
 
-	        bodyEnter
-	            .append('div')
-	            .attr('class', 'conflict-container fillL3')
-	            .call(showConflict, 0);
+	    for (var key in replacements) {
+	      var token = "{".concat(key, "}");
+	      var regex = new RegExp(token, 'g');
 
-	        bodyEnter
-	            .append('div')
-	            .attr('class', 'conflicts-done')
-	            .attr('opacity', 0)
-	            .style('display', 'none')
-	            .text(_t('save.conflict.done'));
+	      if (regex.test(result)) {
+	        var replacement = replacements[key];
 
-	        var buttonsEnter = bodyEnter
-	            .append('div')
-	            .attr('class','buttons col12 joined conflicts-buttons');
+	        if (!replacement) {
+	          throw new Error("Cannot resolve token: ".concat(token));
+	        } else {
+	          if (addLinks && (key === 'signupUrl' || key === 'url')) {
+	            replacement = linkify(replacement);
+	          }
 
-	        buttonsEnter
-	            .append('button')
-	            .attr('disabled', _conflictList.length > 1)
-	            .attr('class', 'action conflicts-button col6')
-	            .text(_t('save.title'))
-	            .on('click.try_again', tryAgain);
+	          result = result.replace(regex, replacement);
+	        }
+	      }
+	    } // There shouldn't be any leftover tokens in a resolved string
 
-	        buttonsEnter
-	            .append('button')
-	            .attr('class', 'secondary-action conflicts-button col6')
-	            .text(_t('confirm.cancel'))
-	            .on('click.cancel', cancel);
-	    }
 
+	    var leftovers = result.match(anyToken);
 
-	    function showConflict(selection, index) {
-	        index = utilWrap(index, _conflictList.length);
-	        _shownConflictIndex = index;
+	    if (leftovers) {
+	      throw new Error("Cannot resolve tokens: ".concat(leftovers));
+	    } // Linkify subreddits like `/r/openstreetmap`
+	    // https://github.com/osmlab/osm-community-index/issues/82
+	    // https://github.com/openstreetmap/iD/issues/4997
 
-	        var parent = select(selection.node().parentNode);
 
-	        // enable save button if this is the last conflict being reviewed..
-	        if (index === _conflictList.length - 1) {
-	            window.setTimeout(function() {
-	                parent.select('.conflicts-button')
-	                    .attr('disabled', null);
+	    if (addLinks && item.type === 'reddit') {
+	      result = result.replace(/(\/r\/\w+\/*)/i, function (match) {
+	        return linkify(resolved.url, match);
+	      });
+	    }
 
-	                parent.select('.conflicts-done')
-	                    .transition()
-	                    .attr('opacity', 1)
-	                    .style('display', 'block');
-	            }, 250);
-	        }
+	    return result;
+	  }
 
-	        var conflict = selection
-	            .selectAll('.conflict')
-	            .data([_conflictList[index]]);
+	  function linkify(url, text) {
+	    if (!url) return undefined;
+	    text = text || url;
+	    return "<a target=\"_blank\" href=\"".concat(url, "\">").concat(text, "</a>");
+	  }
+	}
 
-	        conflict.exit()
-	            .remove();
+	var _oci = null;
+	function uiSuccess(context) {
+	  var MAXEVENTS = 2;
+	  var dispatch = dispatch$8('cancel');
 
-	        var conflictEnter = conflict.enter()
-	            .append('div')
-	            .attr('class', 'conflict');
-
-	        conflictEnter
-	            .append('h4')
-	            .attr('class', 'conflict-count')
-	            .text(_t('save.conflict.count', { num: index + 1, total: _conflictList.length }));
-
-	        conflictEnter
-	            .append('a')
-	            .attr('class', 'conflict-description')
-	            .attr('href', '#')
-	            .text(function(d) { return d.name; })
-	            .on('click', function(d) {
-	                event.preventDefault();
-	                zoomToEntity(d.id);
-	            });
+	  var _changeset;
 
-	        var details = conflictEnter
-	            .append('div')
-	            .attr('class', 'conflict-detail-container');
+	  var _location;
 
-	        details
-	            .append('ul')
-	            .attr('class', 'conflict-detail-list')
-	            .selectAll('li')
-	            .data(function(d) { return d.details || []; })
-	            .enter()
-	            .append('li')
-	            .attr('class', 'conflict-detail-item')
-	            .html(function(d) { return d; });
+	  ensureOSMCommunityIndex(); // start fetching the data
 
-	        details
-	            .append('div')
-	            .attr('class', 'conflict-choices')
-	            .call(addChoices);
+	  function ensureOSMCommunityIndex() {
+	    var data = _mainFileFetcher;
+	    return Promise.all([data.get('oci_features'), data.get('oci_resources'), data.get('oci_defaults')]).then(function (vals) {
+	      if (_oci) return _oci; // Merge Custom Features
 
-	        details
-	            .append('div')
-	            .attr('class', 'conflict-nav-buttons joined cf')
-	            .selectAll('button')
-	            .data(['previous', 'next'])
-	            .enter()
-	            .append('button')
-	            .text(function(d) { return _t('save.conflict.' + d); })
-	            .attr('class', 'conflict-nav-button action col6')
-	            .attr('disabled', function(d, i) {
-	                return (i === 0 && index === 0) ||
-	                    (i === 1 && index === _conflictList.length - 1) || null;
-	            })
-	            .on('click', function(d, i) {
-	                event.preventDefault();
-
-	                var container = parent.selectAll('.conflict-container');
-	                var sign = (i === 0 ? -1 : 1);
-
-	                container
-	                    .selectAll('.conflict')
-	                    .remove();
-
-	                container
-	                    .call(showConflict, index + sign);
-	            });
+	      if (vals[0] && Array.isArray(vals[0].features)) {
+	        _mainLocations.mergeCustomGeoJSON(vals[0]);
+	      }
 
-	    }
+	      var ociResources = Object.values(vals[1].resources);
 
+	      if (ociResources.length) {
+	        // Resolve all locationSet features.
+	        return _mainLocations.mergeLocationSets(ociResources).then(function () {
+	          _oci = {
+	            resources: ociResources,
+	            defaults: vals[2].defaults
+	          };
+	          return _oci;
+	        });
+	      } else {
+	        _oci = {
+	          resources: [],
+	          // no resources?
+	          defaults: vals[2].defaults
+	        };
+	        return _oci;
+	      }
+	    });
+	  } // string-to-date parsing in JavaScript is weird
 
-	    function addChoices(selection) {
-	        var choices = selection
-	            .append('ul')
-	            .attr('class', 'layer-list')
-	            .selectAll('li')
-	            .data(function(d) { return d.choices || []; });
 
-	        // enter
-	        var choicesEnter = choices.enter()
-	            .append('li')
-	            .attr('class', 'layer');
+	  function parseEventDate(when) {
+	    if (!when) return;
+	    var raw = when.trim();
+	    if (!raw) return;
 
-	        var labelEnter = choicesEnter
-	            .append('label');
+	    if (!/Z$/.test(raw)) {
+	      // if no trailing 'Z', add one
+	      raw += 'Z'; // this forces date to be parsed as a UTC date
+	    }
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'radio')
-	            .attr('name', function(d) { return d.id; })
-	            .on('change', function(d, i) {
-	                var ul = this.parentNode.parentNode.parentNode;
-	                ul.__data__.chosen = i;
-	                choose(ul, d);
-	            });
+	    var parsed = new Date(raw);
+	    return new Date(parsed.toUTCString().substr(0, 25)); // convert to local timezone
+	  }
 
-	        labelEnter
-	            .append('span')
-	            .text(function(d) { return d.text; });
-
-	        // update
-	        choicesEnter
-	            .merge(choices)
-	            .each(function(d, i) {
-	                var ul = this.parentNode;
-	                if (ul.__data__.chosen === i) {
-	                    choose(ul, d);
-	                }
-	            });
-	    }
+	  function success(selection) {
+	    var header = selection.append('div').attr('class', 'header fillL');
+	    header.append('h3').html(_t.html('success.just_edited'));
+	    header.append('button').attr('class', 'close').on('click', function () {
+	      return dispatch.call('cancel');
+	    }).call(svgIcon('#iD-icon-close'));
+	    var body = selection.append('div').attr('class', 'body save-success fillL');
+	    var summary = body.append('div').attr('class', 'save-summary');
+	    summary.append('h3').html(_t.html('success.thank_you' + (_location ? '_location' : ''), {
+	      where: _location
+	    }));
+	    summary.append('p').html(_t.html('success.help_html')).append('a').attr('class', 'link-out').attr('target', '_blank').attr('href', _t('success.help_link_url')).call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html('success.help_link_text'));
+	    var osm = context.connection();
+	    if (!osm) return;
+	    var changesetURL = osm.changesetURL(_changeset.id);
+	    var table = summary.append('table').attr('class', 'summary-table');
+	    var row = table.append('tr').attr('class', 'summary-row');
+	    row.append('td').attr('class', 'cell-icon summary-icon').append('a').attr('target', '_blank').attr('href', changesetURL).append('svg').attr('class', 'logo-small').append('use').attr('xlink:href', '#iD-logo-osm');
+	    var summaryDetail = row.append('td').attr('class', 'cell-detail summary-detail');
+	    summaryDetail.append('a').attr('class', 'cell-detail summary-view-on-osm').attr('target', '_blank').attr('href', changesetURL).html(_t.html('success.view_on_osm'));
+	    summaryDetail.append('div').html(_t.html('success.changeset_id', {
+	      changeset_id: "<a href=\"".concat(changesetURL, "\" target=\"_blank\">").concat(_changeset.id, "</a>")
+	    })); // Get OSM community index features intersecting the map..
+
+	    ensureOSMCommunityIndex().then(function (oci) {
+	      var loc = context.map().center();
+	      var validLocations = _mainLocations.locationsAt(loc); // Gather the communities
+
+	      var communities = [];
+	      oci.resources.forEach(function (resource) {
+	        var area = validLocations[resource.locationSetID];
+	        if (!area) return; // Resolve strings
+
+	        var localizer = function localizer(stringID) {
+	          return _t.html("community.".concat(stringID));
+	        };
 
+	        resource.resolved = resolveStrings(resource, oci.defaults, localizer);
+	        communities.push({
+	          area: area,
+	          order: resource.order || 0,
+	          resource: resource
+	        });
+	      }); // sort communities by feature area ascending, community order descending
 
-	    function choose(ul, datum) {
-	        if (event) { event.preventDefault(); }
+	      communities.sort(function (a, b) {
+	        return a.area - b.area || b.order - a.order;
+	      });
+	      body.call(showCommunityLinks, communities.map(function (c) {
+	        return c.resource;
+	      }));
+	    });
+	  }
 
-	        select(ul)
-	            .selectAll('li')
-	            .classed('active', function(d) { return d === datum; })
-	            .selectAll('input')
-	            .property('checked', function(d) { return d === datum; });
+	  function showCommunityLinks(selection, resources) {
+	    var communityLinks = selection.append('div').attr('class', 'save-communityLinks');
+	    communityLinks.append('h3').html(_t.html('success.like_osm'));
+	    var table = communityLinks.append('table').attr('class', 'community-table');
+	    var row = table.selectAll('.community-row').data(resources);
+	    var rowEnter = row.enter().append('tr').attr('class', 'community-row');
+	    rowEnter.append('td').attr('class', 'cell-icon community-icon').append('a').attr('target', '_blank').attr('href', function (d) {
+	      return d.resolved.url;
+	    }).append('svg').attr('class', 'logo-small').append('use').attr('xlink:href', function (d) {
+	      return "#community-".concat(d.type);
+	    });
+	    var communityDetail = rowEnter.append('td').attr('class', 'cell-detail community-detail');
+	    communityDetail.each(showCommunityDetails);
+	    communityLinks.append('div').attr('class', 'community-missing').html(_t.html('success.missing')).append('a').attr('class', 'link-out').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/osmlab/osm-community-index/issues').append('span').html(_t.html('success.tell_us'));
+	  }
 
-	        var extent = geoExtent();
-	        var entity;
+	  function showCommunityDetails(d) {
+	    var selection = select(this);
+	    var communityID = d.id;
+	    selection.append('div').attr('class', 'community-name').html(d.resolved.nameHTML);
+	    selection.append('div').attr('class', 'community-description').html(d.resolved.descriptionHTML); // Create an expanding section if any of these are present..
+
+	    if (d.resolved.extendedDescriptionHTML || d.languageCodes && d.languageCodes.length) {
+	      selection.append('div').call(uiDisclosure(context, "community-more-".concat(d.id), false).expanded(false).updatePreference(false).label(_t.html('success.more')).content(showMore));
+	    }
+
+	    var nextEvents = (d.events || []).map(function (event) {
+	      event.date = parseEventDate(event.when);
+	      return event;
+	    }).filter(function (event) {
+	      // date is valid and future (or today)
+	      var t = event.date.getTime();
+	      var now = new Date().setHours(0, 0, 0, 0);
+	      return !isNaN(t) && t >= now;
+	    }).sort(function (a, b) {
+	      // sort by date ascending
+	      return a.date < b.date ? -1 : a.date > b.date ? 1 : 0;
+	    }).slice(0, MAXEVENTS); // limit number of events shown
 
-	        entity = context.graph().hasEntity(datum.id);
-	        if (entity) { extent._extend(entity.extent(context.graph())); }
+	    if (nextEvents.length) {
+	      selection.append('div').call(uiDisclosure(context, "community-events-".concat(d.id), false).expanded(false).updatePreference(false).label(_t.html('success.events')).content(showNextEvents)).select('.hide-toggle').append('span').attr('class', 'badge-text').html(nextEvents.length);
+	    }
 
-	        datum.action();
+	    function showMore(selection) {
+	      var more = selection.selectAll('.community-more').data([0]);
+	      var moreEnter = more.enter().append('div').attr('class', 'community-more');
 
-	        entity = context.graph().hasEntity(datum.id);
-	        if (entity) { extent._extend(entity.extent(context.graph())); }
+	      if (d.resolved.extendedDescriptionHTML) {
+	        moreEnter.append('div').attr('class', 'community-extended-description').html(d.resolved.extendedDescriptionHTML);
+	      }
 
-	        zoomToEntity(datum.id, extent);
+	      if (d.languageCodes && d.languageCodes.length) {
+	        var languageList = d.languageCodes.map(function (code) {
+	          return _mainLocalizer.languageName(code);
+	        }).join(', ');
+	        moreEnter.append('div').attr('class', 'community-languages').html(_t.html('success.languages', {
+	          languages: languageList
+	        }));
+	      }
 	    }
 
-
-	    function zoomToEntity(id, extent) {
-	        context.surface().selectAll('.hover')
-	            .classed('hover', false);
-
-	        var entity = context.graph().hasEntity(id);
-	        if (entity) {
-	            if (extent) {
-	                context.map().trimmedExtent(extent);
-	            } else {
-	                context.map().zoomToEase(entity);
-	            }
-	            context.surface().selectAll(utilEntityOrMemberSelector([entity.id], context.graph()))
-	                .classed('hover', true);
+	    function showNextEvents(selection) {
+	      var events = selection.append('div').attr('class', 'community-events');
+	      var item = events.selectAll('.community-event').data(nextEvents);
+	      var itemEnter = item.enter().append('div').attr('class', 'community-event');
+	      itemEnter.append('div').attr('class', 'community-event-name').append('a').attr('target', '_blank').attr('href', function (d) {
+	        return d.url;
+	      }).html(function (d) {
+	        var name = d.name;
+
+	        if (d.i18n && d.id) {
+	          name = _t("community.".concat(communityID, ".events.").concat(d.id, ".name"), {
+	            "default": name
+	          });
 	        }
-	    }
 
+	        return name;
+	      });
+	      itemEnter.append('div').attr('class', 'community-event-when').html(function (d) {
+	        var options = {
+	          weekday: 'short',
+	          day: 'numeric',
+	          month: 'short',
+	          year: 'numeric'
+	        };
 
-	    // The conflict list should be an array of objects like:
-	    // {
-	    //     id: id,
-	    //     name: entityName(local),
-	    //     details: merge.conflicts(),
-	    //     chosen: 1,
-	    //     choices: [
-	    //         choice(id, keepMine, forceLocal),
-	    //         choice(id, keepTheirs, forceRemote)
-	    //     ]
-	    // }
-	    conflicts.conflictList = function(_) {
-	        if (!arguments.length) { return _conflictList; }
-	        _conflictList = _;
-	        return conflicts;
-	    };
+	        if (d.date.getHours() || d.date.getMinutes()) {
+	          // include time if it has one
+	          options.hour = 'numeric';
+	          options.minute = 'numeric';
+	        }
 
+	        return d.date.toLocaleString(_mainLocalizer.localeCode(), options);
+	      });
+	      itemEnter.append('div').attr('class', 'community-event-where').html(function (d) {
+	        var where = d.where;
 
-	    conflicts.origChanges = function(_) {
-	        if (!arguments.length) { return _origChanges; }
-	        _origChanges = _;
-	        return conflicts;
-	    };
+	        if (d.i18n && d.id) {
+	          where = _t("community.".concat(communityID, ".events.").concat(d.id, ".where"), {
+	            "default": where
+	          });
+	        }
 
+	        return where;
+	      });
+	      itemEnter.append('div').attr('class', 'community-event-description').html(function (d) {
+	        var description = d.description;
 
-	    conflicts.shownEntityIds = function() {
-	        if (_conflictList && typeof _shownConflictIndex === 'number') {
-	            return [_conflictList[_shownConflictIndex].id];
+	        if (d.i18n && d.id) {
+	          description = _t("community.".concat(communityID, ".events.").concat(d.id, ".description"), {
+	            "default": description
+	          });
 	        }
-	        return [];
-	    };
 
+	        return description;
+	      });
+	    }
+	  }
 
-	    return utilRebind(conflicts, dispatch$1, 'on');
-	}
+	  success.changeset = function (val) {
+	    if (!arguments.length) return _changeset;
+	    _changeset = val;
+	    return success;
+	  };
 
-	function uiConfirm(selection) {
-	    var modalSelection = uiModal(selection);
+	  success.location = function (val) {
+	    if (!arguments.length) return _location;
+	    _location = val;
+	    return success;
+	  };
 
-	    modalSelection.select('.modal')
-	        .classed('modal-alert', true);
+	  return utilRebind(success, dispatch, 'on');
+	}
 
-	    var section = modalSelection.select('.content');
+	function modeSave(context) {
+	  var mode = {
+	    id: 'save'
+	  };
+	  var keybinding = utilKeybinding('modeSave');
+	  var commit = uiCommit(context).on('cancel', cancel);
 
-	    section.append('div')
-	        .attr('class', 'modal-section header');
+	  var _conflictsUi; // uiConflicts
 
-	    section.append('div')
-	        .attr('class', 'modal-section message-text');
 
-	    var buttons = section.append('div')
-	        .attr('class', 'modal-section buttons cf');
+	  var _location;
 
+	  var _success;
 
-	    modalSelection.okButton = function() {
-	        buttons
-	            .append('button')
-	            .attr('class', 'button ok-button action')
-	            .on('click.confirm', function() {
-	                modalSelection.remove();
-	            })
-	            .text(_t('confirm.okay'))
-	            .node()
-	            .focus();
+	  var uploader = context.uploader().on('saveStarted.modeSave', function () {
+	    keybindingOff();
+	  }) // fire off some async work that we want to be ready later
+	  .on('willAttemptUpload.modeSave', prepareForSuccess).on('progressChanged.modeSave', showProgress).on('resultNoChanges.modeSave', function () {
+	    cancel();
+	  }).on('resultErrors.modeSave', showErrors).on('resultConflicts.modeSave', showConflicts).on('resultSuccess.modeSave', showSuccess);
 
-	        return modalSelection;
-	    };
+	  function cancel() {
+	    context.enter(modeBrowse(context));
+	  }
 
+	  function showProgress(num, total) {
+	    var modal = context.container().select('.loading-modal .modal-section');
+	    var progress = modal.selectAll('.progress').data([0]); // enter/update
+
+	    progress.enter().append('div').attr('class', 'progress').merge(progress).text(_t('save.conflict_progress', {
+	      num: num,
+	      total: total
+	    }));
+	  }
+
+	  function showConflicts(changeset, conflicts, origChanges) {
+	    var selection = context.container().select('.sidebar').append('div').attr('class', 'sidebar-component');
+	    context.container().selectAll('.main-content').classed('active', true).classed('inactive', false);
+	    _conflictsUi = uiConflicts(context).conflictList(conflicts).origChanges(origChanges).on('cancel', function () {
+	      context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
+	      selection.remove();
+	      keybindingOn();
+	      uploader.cancelConflictResolution();
+	    }).on('save', function () {
+	      context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
+	      selection.remove();
+	      uploader.processResolvedConflicts(changeset);
+	    });
+	    selection.call(_conflictsUi);
+	  }
+
+	  function showErrors(errors) {
+	    keybindingOn();
+	    var selection = uiConfirm(context.container());
+	    selection.select('.modal-section.header').append('h3').text(_t('save.error'));
+	    addErrors(selection, errors);
+	    selection.okButton();
+	  }
+
+	  function addErrors(selection, data) {
+	    var message = selection.select('.modal-section.message-text');
+	    var items = message.selectAll('.error-container').data(data);
+	    var enter = items.enter().append('div').attr('class', 'error-container');
+	    enter.append('a').attr('class', 'error-description').attr('href', '#').classed('hide-toggle', true).text(function (d) {
+	      return d.msg || _t('save.unknown_error_details');
+	    }).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      var error = select(this);
+	      var detail = select(this.nextElementSibling);
+	      var exp = error.classed('expanded');
+	      detail.style('display', exp ? 'none' : 'block');
+	      error.classed('expanded', !exp);
+	    });
+	    var details = enter.append('div').attr('class', 'error-detail-container').style('display', 'none');
+	    details.append('ul').attr('class', 'error-detail-list').selectAll('li').data(function (d) {
+	      return d.details || [];
+	    }).enter().append('li').attr('class', 'error-detail-item').text(function (d) {
+	      return d;
+	    });
+	    items.exit().remove();
+	  }
 
-	    return modalSelection;
-	}
+	  function showSuccess(changeset) {
+	    commit.reset();
 
-	function uiChangesetEditor(context) {
-	    var dispatch$1 = dispatch('change');
-	    var formFields = uiFormFields(context);
-	    var commentCombo = uiCombobox(context, 'comment').caseSensitive(true);
-	    var _fieldsArr;
-	    var _tags;
-	    var _changesetID;
+	    var ui = _success.changeset(changeset).location(_location).on('cancel', function () {
+	      context.ui().sidebar.hide();
+	    });
 
+	    context.enter(modeBrowse(context).sidebar(ui));
+	  }
 
-	    function changesetEditor(selection) {
-	        render(selection);
-	    }
+	  function keybindingOn() {
+	    select(document).call(keybinding.on('⎋', cancel, true));
+	  }
 
+	  function keybindingOff() {
+	    select(document).call(keybinding.unbind);
+	  } // Reverse geocode current map location so we can display a message on
+	  // the success screen like "Thank you for editing around place, region."
 
-	    function render(selection) {
-	        var initial = false;
 
-	        if (!_fieldsArr) {
-	            initial = true;
-	            var presets = _mainPresetIndex;
+	  function prepareForSuccess() {
+	    _success = uiSuccess(context);
+	    _location = null;
+	    if (!services.geocoder) return;
+	    services.geocoder.reverse(context.map().center(), function (err, result) {
+	      if (err || !result || !result.address) return;
+	      var addr = result.address;
+	      var place = addr && (addr.town || addr.city || addr.county) || '';
+	      var region = addr && (addr.state || addr.country) || '';
+	      var separator = place && region ? _t('success.thank_you_where.separator') : '';
+	      _location = _t('success.thank_you_where.format', {
+	        place: place,
+	        separator: separator,
+	        region: region
+	      });
+	    });
+	  }
 
-	            _fieldsArr = [
-	                uiField(context, presets.field('comment'), null, { show: true, revert: false }),
-	                uiField(context, presets.field('source'), null, { show: false, revert: false }),
-	                uiField(context, presets.field('hashtags'), null, { show: false, revert: false }) ];
+	  mode.selectedIDs = function () {
+	    return _conflictsUi ? _conflictsUi.shownEntityIds() : [];
+	  };
 
-	            _fieldsArr.forEach(function(field) {
-	                field
-	                    .on('change', function(t, onInput) {
-	                        dispatch$1.call('change', field, undefined, t, onInput);
-	                    });
-	            });
-	        }
+	  mode.enter = function () {
+	    // Show sidebar
+	    context.ui().sidebar.expand();
 
-	        _fieldsArr.forEach(function(field) {
-	            field
-	                .tags(_tags);
-	        });
+	    function done() {
+	      context.ui().sidebar.show(commit);
+	    }
 
+	    keybindingOn();
+	    context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
+	    var osm = context.connection();
 
-	        selection
-	            .call(formFields.fieldsArr(_fieldsArr));
+	    if (!osm) {
+	      cancel();
+	      return;
+	    }
 
+	    if (osm.authenticated()) {
+	      done();
+	    } else {
+	      osm.authenticate(function (err) {
+	        if (err) {
+	          cancel();
+	        } else {
+	          done();
+	        }
+	      });
+	    }
+	  };
 
-	        if (initial) {
-	            var commentField = selection.select('.form-field-comment textarea');
-	            var commentNode = commentField.node();
+	  mode.exit = function () {
+	    keybindingOff();
+	    context.container().selectAll('.main-content').classed('active', true).classed('inactive', false);
+	    context.ui().sidebar.hide();
+	  };
 
-	            if (commentNode) {
-	                commentNode.focus();
-	                commentNode.select();
-	            }
+	  return mode;
+	}
 
-	            // trigger a 'blur' event so that comment field can be cleaned
-	            // and checked for hashtags, even if retrieved from localstorage
-	            utilTriggerEvent(commentField, 'blur');
+	function modeSelectError(context, selectedErrorID, selectedErrorService) {
+	  var mode = {
+	    id: 'select-error',
+	    button: 'browse'
+	  };
+	  var keybinding = utilKeybinding('select-error');
+	  var errorService = services[selectedErrorService];
+	  var errorEditor;
 
-	            var osm = context.connection();
-	            if (osm) {
-	                osm.userChangesets(function (err, changesets) {
-	                    if (err) { return; }
-
-	                    var comments = changesets.map(function(changeset) {
-	                        var comment = changeset.tags.comment;
-	                        return comment ? { title: comment, value: comment } : null;
-	                    }).filter(Boolean);
-
-	                    commentField
-	                        .call(commentCombo
-	                            .data(utilArrayUniqBy(comments, 'title'))
-	                        );
-	                });
-	            }
-	        }
+	  switch (selectedErrorService) {
+	    case 'improveOSM':
+	      errorEditor = uiImproveOsmEditor(context).on('change', function () {
+	        context.map().pan([0, 0]); // trigger a redraw
 
-	        // Add warning if comment mentions Google
-	        var hasGoogle = _tags.comment.match(/google/i);
-	        var commentWarning = selection.select('.form-field-comment').selectAll('.comment-warning')
-	            .data(hasGoogle ? [0] : []);
+	        var error = checkSelectedID();
+	        if (!error) return;
+	        context.ui().sidebar.show(errorEditor.error(error));
+	      });
+	      break;
 
-	        commentWarning.exit()
-	            .transition()
-	            .duration(200)
-	            .style('opacity', 0)
-	            .remove();
+	    case 'keepRight':
+	      errorEditor = uiKeepRightEditor(context).on('change', function () {
+	        context.map().pan([0, 0]); // trigger a redraw
 
-	        var commentEnter = commentWarning.enter()
-	            .insert('div', '.tag-reference-body')
-	            .attr('class', 'field-warning comment-warning')
-	            .style('opacity', 0);
+	        var error = checkSelectedID();
+	        if (!error) return;
+	        context.ui().sidebar.show(errorEditor.error(error));
+	      });
+	      break;
 
-	        commentEnter
-	            .append('a')
-	            .attr('target', '_blank')
-	            .attr('tabindex', -1)
-	            .call(svgIcon('#iD-icon-alert', 'inline'))
-	            .attr('href', _t('commit.google_warning_link'))
-	            .append('span')
-	            .text(_t('commit.google_warning'));
+	    case 'osmose':
+	      errorEditor = uiOsmoseEditor(context).on('change', function () {
+	        context.map().pan([0, 0]); // trigger a redraw
 
-	        commentEnter
-	            .transition()
-	            .duration(200)
-	            .style('opacity', 1);
-	    }
+	        var error = checkSelectedID();
+	        if (!error) return;
+	        context.ui().sidebar.show(errorEditor.error(error));
+	      });
+	      break;
+	  }
 
+	  var behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
 
-	    changesetEditor.tags = function(_) {
-	        if (!arguments.length) { return _tags; }
-	        _tags = _;
-	        // Don't reset _fieldsArr here.
-	        return changesetEditor;
-	    };
+	  function checkSelectedID() {
+	    if (!errorService) return;
+	    var error = errorService.getError(selectedErrorID);
 
+	    if (!error) {
+	      context.enter(modeBrowse(context));
+	    }
 
-	    changesetEditor.changesetID = function(_) {
-	        if (!arguments.length) { return _changesetID; }
-	        if (_changesetID === _) { return changesetEditor; }
-	        _changesetID = _;
-	        _fieldsArr = null;
-	        return changesetEditor;
-	    };
+	    return error;
+	  }
 
+	  mode.zoomToSelected = function () {
+	    if (!errorService) return;
+	    var error = errorService.getError(selectedErrorID);
 
-	    return utilRebind(changesetEditor, dispatch$1, 'on');
-	}
+	    if (error) {
+	      context.map().centerZoomEase(error.loc, 20);
+	    }
+	  };
 
-	function uiSectionChanges(context) {
-	    var detected = utilDetect();
+	  mode.enter = function () {
+	    var error = checkSelectedID();
+	    if (!error) return;
+	    behaviors.forEach(context.install);
+	    keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);
+	    select(document).call(keybinding);
+	    selectError();
+	    var sidebar = context.ui().sidebar;
+	    sidebar.show(errorEditor.error(error));
+	    context.map().on('drawn.select-error', selectError); // class the error as selected, or return to browse mode if the error is gone
 
-	    var _discardTags = {};
-	    _mainFileFetcher.get('discarded')
-	        .then(function(d) { _discardTags = d; })
-	        .catch(function() { /* ignore */ });
+	    function selectError(d3_event, drawn) {
+	      if (!checkSelectedID()) return;
+	      var selection = context.surface().selectAll('.itemId-' + selectedErrorID + '.' + selectedErrorService);
 
-	    var section = uiSection('changes-list', context)
-	        .title(function() {
-	            var history = context.history();
-	            var summary = history.difference().summary();
-	            return _t('commit.changes', { count: summary.length });
-	        })
-	        .disclosureContent(renderDisclosureContent);
+	      if (selection.empty()) {
+	        // Return to browse mode if selected DOM elements have
+	        // disappeared because the user moved them out of view..
+	        var source = d3_event && d3_event.type === 'zoom' && d3_event.sourceEvent;
 
-	    function renderDisclosureContent(selection) {
-	        var history = context.history();
-	        var summary = history.difference().summary();
+	        if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
+	          context.enter(modeBrowse(context));
+	        }
+	      } else {
+	        selection.classed('selected', true);
+	        context.selectedErrorID(selectedErrorID);
+	      }
+	    }
 
-	        var container = selection.selectAll('.commit-section')
-	            .data([0]);
+	    function esc() {
+	      if (context.container().select('.combobox').size()) return;
+	      context.enter(modeBrowse(context));
+	    }
+	  };
 
-	        var containerEnter = container.enter()
-	            .append('div')
-	            .attr('class', 'commit-section');
+	  mode.exit = function () {
+	    behaviors.forEach(context.uninstall);
+	    select(document).call(keybinding.unbind);
+	    context.surface().selectAll('.qaItem.selected').classed('selected hover', false);
+	    context.map().on('drawn.select-error', null);
+	    context.ui().sidebar.hide();
+	    context.selectedErrorID(null);
+	    context.features().forceVisible([]);
+	  };
 
-	        containerEnter
-	            .append('ul')
-	            .attr('class', 'changeset-list');
+	  return mode;
+	}
 
-	        container = containerEnter
-	            .merge(container);
+	function uiToolOldDrawModes(context) {
+	  var tool = {
+	    id: 'old_modes',
+	    label: _t.html('toolbar.add_feature')
+	  };
+	  var modes = [modeAddPoint(context, {
+	    title: _t.html('modes.add_point.title'),
+	    button: 'point',
+	    description: _t.html('modes.add_point.description'),
+	    preset: _mainPresetIndex.item('point'),
+	    key: '1'
+	  }), modeAddLine(context, {
+	    title: _t.html('modes.add_line.title'),
+	    button: 'line',
+	    description: _t.html('modes.add_line.description'),
+	    preset: _mainPresetIndex.item('line'),
+	    key: '2'
+	  }), modeAddArea(context, {
+	    title: _t.html('modes.add_area.title'),
+	    button: 'area',
+	    description: _t.html('modes.add_area.description'),
+	    preset: _mainPresetIndex.item('area'),
+	    key: '3'
+	  })];
+
+	  function enabled() {
+	    return osmEditable();
+	  }
+
+	  function osmEditable() {
+	    return context.editable();
+	  }
+
+	  modes.forEach(function (mode) {
+	    context.keybinding().on(mode.key, function () {
+	      if (!enabled()) return;
+
+	      if (mode.id === context.mode().id) {
+	        context.enter(modeBrowse(context));
+	      } else {
+	        context.enter(mode);
+	      }
+	    });
+	  });
 
+	  tool.render = function (selection) {
+	    var wrap = selection.append('div').attr('class', 'joined').style('display', 'flex');
 
-	        var items = container.select('ul').selectAll('li')
-	            .data(summary);
+	    var debouncedUpdate = debounce(update, 500, {
+	      leading: true,
+	      trailing: true
+	    });
 
-	        var itemsEnter = items.enter()
-	            .append('li')
-	            .attr('class', 'change-item');
+	    context.map().on('move.modes', debouncedUpdate).on('drawn.modes', debouncedUpdate);
+	    context.on('enter.modes', update);
+	    update();
 
-	        itemsEnter
-	            .each(function(d) {
-	                select(this)
-	                    .call(svgIcon('#iD-icon-' + d.entity.geometry(d.graph), 'pre-text ' + d.changeType));
-	            });
+	    function update() {
+	      var buttons = wrap.selectAll('button.add-button').data(modes, function (d) {
+	        return d.id;
+	      }); // exit
 
-	        itemsEnter
-	            .append('span')
-	            .attr('class', 'change-type')
-	            .text(function(d) { return _t('commit.' + d.changeType) + ' '; });
-
-	        itemsEnter
-	            .append('strong')
-	            .attr('class', 'entity-type')
-	            .text(function(d) {
-	                var matched = _mainPresetIndex.match(d.entity, d.graph);
-	                return (matched && matched.name()) || utilDisplayType(d.entity.id);
-	            });
+	      buttons.exit().remove(); // enter
 
-	        itemsEnter
-	            .append('span')
-	            .attr('class', 'entity-name')
-	            .text(function(d) {
-	                var name = utilDisplayName(d.entity) || '',
-	                    string = '';
-	                if (name !== '') {
-	                    string += ':';
-	                }
-	                return string += ' ' + name;
-	            });
+	      var buttonsEnter = buttons.enter().append('button').attr('class', function (d) {
+	        return d.id + ' add-button bar-button';
+	      }).on('click.mode-buttons', function (d3_event, d) {
+	        if (!enabled()) return; // When drawing, ignore accidental clicks on mode buttons - #4042
 
-	        itemsEnter
-	            .style('opacity', 0)
-	            .transition()
-	            .style('opacity', 1);
+	        var currMode = context.mode().id;
+	        if (/^draw/.test(currMode)) return;
 
-	        items = itemsEnter
-	            .merge(items);
+	        if (d.id === currMode) {
+	          context.enter(modeBrowse(context));
+	        } else {
+	          context.enter(d);
+	        }
+	      }).call(uiTooltip().placement('bottom').title(function (d) {
+	        return d.description;
+	      }).keys(function (d) {
+	        return [d.key];
+	      }).scrollContainer(context.container().select('.top-toolbar')));
+	      buttonsEnter.each(function (d) {
+	        select(this).call(svgIcon('#iD-icon-' + d.button));
+	      });
+	      buttonsEnter.append('span').attr('class', 'label').html(function (mode) {
+	        return mode.title;
+	      }); // if we are adding/removing the buttons, check if toolbar has overflowed
 
-	        items
-	            .on('mouseover', mouseover)
-	            .on('mouseout', mouseout)
-	            .on('click', click);
+	      if (buttons.enter().size() || buttons.exit().size()) {
+	        context.ui().checkOverflow('.top-toolbar', true);
+	      } // update
 
 
-	        // Download changeset link
-	        var changeset = new osmChangeset().update({ id: undefined });
-	        var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
+	      buttons = buttons.merge(buttonsEnter).classed('disabled', function (d) {
+	        return !enabled();
+	      }).classed('active', function (d) {
+	        return context.mode() && context.mode().button === d.button;
+	      });
+	    }
+	  };
 
-	        delete changeset.id;  // Export without chnageset_id
+	  return tool;
+	}
 
-	        var data = JXON.stringify(changeset.osmChangeJXON(changes));
-	        var blob = new Blob([data], {type: 'text/xml;charset=utf-8;'});
-	        var fileName = 'changes.osc';
+	function uiToolNotes(context) {
+	  var tool = {
+	    id: 'notes',
+	    label: _t.html('modes.add_note.label')
+	  };
+	  var mode = modeAddNote(context);
 
-	        var linkEnter = container.selectAll('.download-changes')
-	            .data([0])
-	            .enter()
-	            .append('a')
-	            .attr('class', 'download-changes');
-
-	        if (detected.download) {      // All except IE11 and Edge
-	            linkEnter                 // download the data as a file
-	                .attr('href', window.URL.createObjectURL(blob))
-	                .attr('download', fileName);
-
-	        } else {                      // IE11 and Edge
-	            linkEnter                 // open data uri in a new tab
-	                .attr('target', '_blank')
-	                .on('click.download', function() {
-	                    navigator.msSaveBlob(blob, fileName);
-	                });
-	        }
+	  function enabled() {
+	    return notesEnabled() && notesEditable();
+	  }
 
-	        linkEnter
-	            .call(svgIcon('#iD-icon-load', 'inline'))
-	            .append('span')
-	            .text(_t('commit.download_changes'));
+	  function notesEnabled() {
+	    var noteLayer = context.layers().layer('notes');
+	    return noteLayer && noteLayer.enabled();
+	  }
 
+	  function notesEditable() {
+	    var mode = context.mode();
+	    return context.map().notesEditable() && mode && mode.id !== 'save';
+	  }
 
-	        function mouseover(d) {
-	            if (d.entity) {
-	                context.surface().selectAll(
-	                    utilEntityOrMemberSelector([d.entity.id], context.graph())
-	                ).classed('hover', true);
-	            }
-	        }
+	  context.keybinding().on(mode.key, function () {
+	    if (!enabled()) return;
 
+	    if (mode.id === context.mode().id) {
+	      context.enter(modeBrowse(context));
+	    } else {
+	      context.enter(mode);
+	    }
+	  });
 
-	        function mouseout() {
-	            context.surface().selectAll('.hover')
-	                .classed('hover', false);
-	        }
+	  tool.render = function (selection) {
+	    var debouncedUpdate = debounce(update, 500, {
+	      leading: true,
+	      trailing: true
+	    });
 
+	    context.map().on('move.notes', debouncedUpdate).on('drawn.notes', debouncedUpdate);
+	    context.on('enter.notes', update);
+	    update();
 
-	        function click(change) {
-	            if (change.changeType !== 'deleted') {
-	                var entity = change.entity;
-	                context.map().zoomToEase(entity);
-	                context.surface().selectAll(utilEntityOrMemberSelector([entity.id], context.graph()))
-	                    .classed('hover', true);
-	            }
-	        }
-	    }
+	    function update() {
+	      var showNotes = notesEnabled();
+	      var data = showNotes ? [mode] : [];
+	      var buttons = selection.selectAll('button.add-button').data(data, function (d) {
+	        return d.id;
+	      }); // exit
 
-	    return section;
-	}
+	      buttons.exit().remove(); // enter
 
-	function uiCommitWarnings(context) {
+	      var buttonsEnter = buttons.enter().append('button').attr('class', function (d) {
+	        return d.id + ' add-button bar-button';
+	      }).on('click.notes', function (d3_event, d) {
+	        if (!enabled()) return; // When drawing, ignore accidental clicks on mode buttons - #4042
 
-	    function commitWarnings(selection) {
-	        var issuesBySeverity = context.validator()
-	            .getIssuesBySeverity({ what: 'edited', where: 'all', includeDisabledRules: true });
+	        var currMode = context.mode().id;
+	        if (/^draw/.test(currMode)) return;
 
-	        for (var severity in issuesBySeverity) {
-	            var issues = issuesBySeverity[severity];
-	            var section = severity + '-section';
-	            var issueItem = severity + '-item';
+	        if (d.id === currMode) {
+	          context.enter(modeBrowse(context));
+	        } else {
+	          context.enter(d);
+	        }
+	      }).call(uiTooltip().placement('bottom').title(function (d) {
+	        return d.description;
+	      }).keys(function (d) {
+	        return [d.key];
+	      }).scrollContainer(context.container().select('.top-toolbar')));
+	      buttonsEnter.each(function (d) {
+	        select(this).call(svgIcon(d.icon || '#iD-icon-' + d.button));
+	      }); // if we are adding/removing the buttons, check if toolbar has overflowed
+
+	      if (buttons.enter().size() || buttons.exit().size()) {
+	        context.ui().checkOverflow('.top-toolbar', true);
+	      } // update
+
+
+	      buttons = buttons.merge(buttonsEnter).classed('disabled', function (d) {
+	        return !enabled();
+	      }).classed('active', function (d) {
+	        return context.mode() && context.mode().button === d.button;
+	      });
+	    }
+	  };
 
-	            var container = selection.selectAll('.' + section)
-	                .data(issues.length ? [0] : []);
+	  tool.uninstall = function () {
+	    context.on('enter.editor.notes', null).on('exit.editor.notes', null).on('enter.notes', null);
+	    context.map().on('move.notes', null).on('drawn.notes', null);
+	  };
 
-	            container.exit()
-	                .remove();
+	  return tool;
+	}
 
-	            var containerEnter = container.enter()
-	                .append('div')
-	                .attr('class', 'modal-section ' + section + ' fillL2');
+	function uiToolSave(context) {
+	  var tool = {
+	    id: 'save',
+	    label: _t.html('save.title')
+	  };
+	  var button = null;
+	  var tooltipBehavior = null;
+	  var history = context.history();
+	  var key = uiCmd('⌘S');
+	  var _numChanges = 0;
 
-	            containerEnter
-	                .append('h3')
-	                .text(severity === 'warning' ? _t('commit.warnings') : _t('commit.errors'));
+	  function isSaving() {
+	    var mode = context.mode();
+	    return mode && mode.id === 'save';
+	  }
 
-	            containerEnter
-	                .append('ul')
-	                .attr('class', 'changeset-list');
+	  function isDisabled() {
+	    return _numChanges === 0 || isSaving();
+	  }
 
-	            container = containerEnter
-	                .merge(container);
+	  function save(d3_event) {
+	    d3_event.preventDefault();
 
+	    if (!context.inIntro() && !isSaving() && history.hasChanges()) {
+	      context.enter(modeSave(context));
+	    }
+	  }
 
-	            var items = container.select('ul').selectAll('li')
-	                .data(issues, function(d) { return d.id; });
+	  function bgColor() {
+	    var step;
 
-	            items.exit()
-	                .remove();
+	    if (_numChanges === 0) {
+	      return null;
+	    } else if (_numChanges <= 50) {
+	      step = _numChanges / 50;
+	      return d3_interpolateRgb('#fff', '#ff8')(step); // white -> yellow
+	    } else {
+	      step = Math.min((_numChanges - 50) / 50, 1.0);
+	      return d3_interpolateRgb('#ff8', '#f88')(step); // yellow -> red
+	    }
+	  }
 
-	            var itemsEnter = items.enter()
-	                .append('li')
-	                .attr('class', issueItem);
+	  function updateCount() {
+	    var val = history.difference().summary().length;
+	    if (val === _numChanges) return;
+	    _numChanges = val;
 
-	            itemsEnter
-	                .call(svgIcon('#iD-icon-alert', 'pre-text'));
+	    if (tooltipBehavior) {
+	      tooltipBehavior.title(_t.html(_numChanges > 0 ? 'save.help' : 'save.no_changes')).keys([key]);
+	    }
 
-	            itemsEnter
-	                .append('strong')
-	                .attr('class', 'issue-message');
+	    if (button) {
+	      button.classed('disabled', isDisabled()).style('background', bgColor());
+	      button.select('span.count').html(_numChanges);
+	    }
+	  }
 
-	            itemsEnter.filter(function(d) { return d.tooltip; })
-	                .call(uiTooltip()
-	                    .title(function(d) { return d.tooltip; })
-	                    .placement('top')
-	                );
+	  tool.render = function (selection) {
+	    tooltipBehavior = uiTooltip().placement('bottom').title(_t.html('save.no_changes')).keys([key]).scrollContainer(context.container().select('.top-toolbar'));
+	    var lastPointerUpType;
+	    button = selection.append('button').attr('class', 'save disabled bar-button').on('pointerup', function (d3_event) {
+	      lastPointerUpType = d3_event.pointerType;
+	    }).on('click', function (d3_event) {
+	      save(d3_event);
 
-	            items = itemsEnter
-	                .merge(items);
+	      if (_numChanges === 0 && (lastPointerUpType === 'touch' || lastPointerUpType === 'pen')) {
+	        // there are no tooltips for touch interactions so flash feedback instead
+	        context.ui().flash.duration(2000).iconName('#iD-icon-save').iconClass('disabled').label(_t.html('save.no_changes'))();
+	      }
 
-	            items.selectAll('.issue-message')
-	                .text(function(d) {
-	                    return d.message(context);
-	                });
+	      lastPointerUpType = null;
+	    }).call(tooltipBehavior);
+	    button.call(svgIcon('#iD-icon-save'));
+	    button.append('span').attr('class', 'count').attr('aria-hidden', 'true').html('0');
+	    updateCount();
+	    context.keybinding().on(key, save, true);
+	    context.history().on('change.save', updateCount);
+	    context.on('enter.save', function () {
+	      if (button) {
+	        button.classed('disabled', isDisabled());
 
-	            items
-	                .on('mouseover', function(d) {
-	                    if (d.entityIds) {
-	                        context.surface().selectAll(
-	                            utilEntityOrMemberSelector(
-	                                d.entityIds,
-	                                context.graph()
-	                            )
-	                        ).classed('hover', true);
-	                    }
-	                })
-	                .on('mouseout', function() {
-	                    context.surface().selectAll('.hover')
-	                        .classed('hover', false);
-	                })
-	                .on('click', function(d) {
-	                    context.validator().focusIssue(d);
-	                });
+	        if (isSaving()) {
+	          button.call(tooltipBehavior.hide);
 	        }
-	    }
+	      }
+	    });
+	  };
 
+	  tool.uninstall = function () {
+	    context.keybinding().off(key, true);
+	    context.history().on('change.save', null);
+	    context.on('enter.save', null);
+	    button = null;
+	    tooltipBehavior = null;
+	  };
 
-	    return commitWarnings;
+	  return tool;
 	}
 
-	var readOnlyTags = [
-	    /^changesets_count$/,
-	    /^created_by$/,
-	    /^ideditor:/,
-	    /^imagery_used$/,
-	    /^host$/,
-	    /^locale$/,
-	    /^warnings:/,
-	    /^resolved:/,
-	    /^closed:note$/,
-	    /^closed:keepright$/,
-	    /^closed:improveosm:/,
-	    /^closed:osmose:/
-	];
-
-	// treat most punctuation (except -, _, +, &) as hashtag delimiters - #4398
-	// from https://stackoverflow.com/a/25575009
-	var hashtagRegex = /(#[^\u2000-\u206F\u2E00-\u2E7F\s\\'!"#$%()*,.\/:;<=>?@\[\]^`{|}~]+)/g;
+	function uiToolSidebarToggle(context) {
+	  var tool = {
+	    id: 'sidebar_toggle',
+	    label: _t.html('toolbar.inspect')
+	  };
 
+	  tool.render = function (selection) {
+	    selection.append('button').attr('class', 'bar-button').on('click', function () {
+	      context.ui().sidebar.toggle();
+	    }).call(uiTooltip().placement('bottom').title(_t.html('sidebar.tooltip')).keys([_t('sidebar.key')]).scrollContainer(context.container().select('.top-toolbar'))).call(svgIcon('#iD-icon-sidebar-' + (_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')));
+	  };
 
-	function uiCommit(context) {
-	    var dispatch$1 = dispatch('cancel');
-	    var _userDetails;
-	    var _selection;
+	  return tool;
+	}
 
-	    var changesetEditor = uiChangesetEditor(context)
-	        .on('change', changeTags);
-	    var rawTagEditor = uiSectionRawTagEditor('changeset-tag-editor', context)
-	        .on('change', changeTags)
-	        .readOnlyTags(readOnlyTags);
-	    var commitChanges = uiSectionChanges(context);
-	    var commitWarnings = uiCommitWarnings(context);
+	function uiToolUndoRedo(context) {
+	  var tool = {
+	    id: 'undo_redo',
+	    label: _t.html('toolbar.undo_redo')
+	  };
+	  var commands = [{
+	    id: 'undo',
+	    cmd: uiCmd('⌘Z'),
+	    action: function action() {
+	      context.undo();
+	    },
+	    annotation: function annotation() {
+	      return context.history().undoAnnotation();
+	    },
+	    icon: 'iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')
+	  }, {
+	    id: 'redo',
+	    cmd: uiCmd('⌘⇧Z'),
+	    action: function action() {
+	      context.redo();
+	    },
+	    annotation: function annotation() {
+	      return context.history().redoAnnotation();
+	    },
+	    icon: 'iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'undo' : 'redo')
+	  }];
 
+	  function editable() {
+	    return context.mode() && context.mode().id !== 'save' && context.map().editableDataEnabled(true
+	    /* ignore min zoom */
+	    );
+	  }
 
-	    function commit(selection) {
-	        _selection = selection;
+	  tool.render = function (selection) {
+	    var tooltipBehavior = uiTooltip().placement('bottom').title(function (d) {
+	      return d.annotation() ? _t.html(d.id + '.tooltip', {
+	        action: d.annotation()
+	      }) : _t.html(d.id + '.nothing');
+	    }).keys(function (d) {
+	      return [d.cmd];
+	    }).scrollContainer(context.container().select('.top-toolbar'));
+	    var lastPointerUpType;
+	    var buttons = selection.selectAll('button').data(commands).enter().append('button').attr('class', function (d) {
+	      return 'disabled ' + d.id + '-button bar-button';
+	    }).on('pointerup', function (d3_event) {
+	      // `pointerup` is always called before `click`
+	      lastPointerUpType = d3_event.pointerType;
+	    }).on('click', function (d3_event, d) {
+	      d3_event.preventDefault();
+	      var annotation = d.annotation();
+
+	      if (editable() && annotation) {
+	        d.action();
+	      }
 
-	        // Initialize changeset if one does not exist yet.
-	        if (!context.changeset) { initChangeset(); }
+	      if (editable() && (lastPointerUpType === 'touch' || lastPointerUpType === 'pen')) {
+	        // there are no tooltips for touch interactions so flash feedback instead
+	        var text = annotation ? _t(d.id + '.tooltip', {
+	          action: annotation
+	        }) : _t(d.id + '.nothing');
+	        context.ui().flash.duration(2000).iconName('#' + d.icon).iconClass(annotation ? '' : 'disabled').label(text)();
+	      }
 
-	        loadDerivedChangesetTags();
+	      lastPointerUpType = null;
+	    }).call(tooltipBehavior);
+	    buttons.each(function (d) {
+	      select(this).call(svgIcon('#' + d.icon));
+	    });
+	    context.keybinding().on(commands[0].cmd, function (d3_event) {
+	      d3_event.preventDefault();
+	      if (editable()) commands[0].action();
+	    }).on(commands[1].cmd, function (d3_event) {
+	      d3_event.preventDefault();
+	      if (editable()) commands[1].action();
+	    });
 
-	        selection.call(render);
-	    }
+	    var debouncedUpdate = debounce(update, 500, {
+	      leading: true,
+	      trailing: true
+	    });
 
-	    function initChangeset() {
+	    context.map().on('move.undo_redo', debouncedUpdate).on('drawn.undo_redo', debouncedUpdate);
+	    context.history().on('change.undo_redo', function (difference) {
+	      if (difference) update();
+	    });
+	    context.on('enter.undo_redo', update);
 
-	        // expire stored comment, hashtags, source after cutoff datetime - #3947 #4899
-	        var commentDate = +corePreferences('commentDate') || 0;
-	        var currDate = Date.now();
-	        var cutoff = 2 * 86400 * 1000;   // 2 days
-	        if (commentDate > currDate || currDate - commentDate > cutoff) {
-	            corePreferences('comment', null);
-	            corePreferences('hashtags', null);
-	            corePreferences('source', null);
-	        }
+	    function update() {
+	      buttons.classed('disabled', function (d) {
+	        return !editable() || !d.annotation();
+	      }).each(function () {
+	        var selection = select(this);
 
-	        // load in explicitly-set values, if any
-	        if (context.defaultChangesetComment()) {
-	            corePreferences('comment', context.defaultChangesetComment());
-	            corePreferences('commentDate', Date.now());
-	        }
-	        if (context.defaultChangesetSource()) {
-	            corePreferences('source', context.defaultChangesetSource());
-	            corePreferences('commentDate', Date.now());
-	        }
-	        if (context.defaultChangesetHashtags()) {
-	            corePreferences('hashtags', context.defaultChangesetHashtags());
-	            corePreferences('commentDate', Date.now());
+	        if (!selection.select('.tooltip.in').empty()) {
+	          selection.call(tooltipBehavior.updateContent);
 	        }
+	      });
+	    }
+	  };
 
-	        var detected = utilDetect();
-	        var tags = {
-	            comment: corePreferences('comment') || '',
-	            created_by: context.cleanTagValue('iD ' + context.version),
-	            host: context.cleanTagValue(detected.host),
-	            locale: context.cleanTagValue(_mainLocalizer.localeCode())
-	        };
+	  tool.uninstall = function () {
+	    context.keybinding().off(commands[0].cmd).off(commands[1].cmd);
+	    context.map().on('move.undo_redo', null).on('drawn.undo_redo', null);
+	    context.history().on('change.undo_redo', null);
+	    context.on('enter.undo_redo', null);
+	  };
 
-	        // call findHashtags initially - this will remove stored
-	        // hashtags if any hashtags are found in the comment - #4304
-	        findHashtags(tags, true);
+	  return tool;
+	}
 
-	        var hashtags = corePreferences('hashtags');
-	        if (hashtags) {
-	            tags.hashtags = hashtags;
-	        }
+	function uiTopToolbar(context) {
+	  var sidebarToggle = uiToolSidebarToggle(context),
+	      modes = uiToolOldDrawModes(context),
+	      notes = uiToolNotes(context),
+	      undoRedo = uiToolUndoRedo(context),
+	      save = uiToolSave(context);
+
+	  function notesEnabled() {
+	    var noteLayer = context.layers().layer('notes');
+	    return noteLayer && noteLayer.enabled();
+	  }
+
+	  function topToolbar(bar) {
+	    bar.on('wheel.topToolbar', function (d3_event) {
+	      if (!d3_event.deltaX) {
+	        // translate vertical scrolling into horizontal scrolling in case
+	        // the user doesn't have an input device that can scroll horizontally
+	        bar.node().scrollLeft += d3_event.deltaY;
+	      }
+	    });
 
-	        var source = corePreferences('source');
-	        if (source) {
-	            tags.source = source;
-	        }
-	        var photoOverlaysUsed = context.history().photoOverlaysUsed();
-	        if (photoOverlaysUsed.length) {
-	            var sources = (tags.source || '').split(';');
+	    var debouncedUpdate = debounce(update, 500, {
+	      leading: true,
+	      trailing: true
+	    });
 
-	            // include this tag for any photo layer
-	            if (sources.indexOf('streetlevel imagery') === -1) {
-	                sources.push('streetlevel imagery');
-	            }
+	    context.layers().on('change.topToolbar', debouncedUpdate);
+	    update();
 
-	            // add the photo overlays used during editing as sources
-	            photoOverlaysUsed.forEach(function(photoOverlay) {
-	                if (sources.indexOf(photoOverlay) === -1) {
-	                    sources.push(photoOverlay);
-	                }
-	            });
+	    function update() {
+	      var tools = [sidebarToggle, 'spacer', modes];
+	      tools.push('spacer');
 
-	            tags.source = context.cleanTagValue(sources.join(';'));
-	        }
+	      if (notesEnabled()) {
+	        tools = tools.concat([notes, 'spacer']);
+	      }
 
-	        context.changeset = new osmChangeset({ tags: tags });
+	      tools = tools.concat([undoRedo, save]);
+	      var toolbarItems = bar.selectAll('.toolbar-item').data(tools, function (d) {
+	        return d.id || d;
+	      });
+	      toolbarItems.exit().each(function (d) {
+	        if (d.uninstall) {
+	          d.uninstall();
+	        }
+	      }).remove();
+	      var itemsEnter = toolbarItems.enter().append('div').attr('class', function (d) {
+	        var classes = 'toolbar-item ' + (d.id || d).replace('_', '-');
+	        if (d.klass) classes += ' ' + d.klass;
+	        return classes;
+	      });
+	      var actionableItems = itemsEnter.filter(function (d) {
+	        return d !== 'spacer';
+	      });
+	      actionableItems.append('div').attr('class', 'item-content').each(function (d) {
+	        select(this).call(d.render, bar);
+	      });
+	      actionableItems.append('div').attr('class', 'item-label').html(function (d) {
+	        return d.label;
+	      });
 	    }
+	  }
 
-	    // Calculates read-only metadata tags based on the user's editing session and applies
-	    // them to the changeset.
-	    function loadDerivedChangesetTags() {
-
-	        var osm = context.connection();
-	        if (!osm) { return; }
-
-	        var tags = Object.assign({}, context.changeset.tags);   // shallow copy
-
-	        // assign tags for imagery used
-	        var imageryUsed = context.cleanTagValue(context.history().imageryUsed().join(';'));
-	        tags.imagery_used = imageryUsed || 'None';
-
-	        // assign tags for closed issues and notes
-	        var osmClosed = osm.getClosedIDs();
-	        var itemType;
-	        if (osmClosed.length) {
-	            tags['closed:note'] = context.cleanTagValue(osmClosed.join(';'));
-	        }
-	        if (services.keepRight) {
-	            var krClosed = services.keepRight.getClosedIDs();
-	            if (krClosed.length) {
-	                tags['closed:keepright'] = context.cleanTagValue(krClosed.join(';'));
-	            }
-	        }
-	        if (services.improveOSM) {
-	            var iOsmClosed = services.improveOSM.getClosedCounts();
-	            for (itemType in iOsmClosed) {
-	                tags['closed:improveosm:' + itemType] = context.cleanTagValue(iOsmClosed[itemType].toString());
-	            }
-	        }
-	        if (services.osmose) {
-	            var osmoseClosed = services.osmose.getClosedCounts();
-	            for (itemType in osmoseClosed) {
-	                tags['closed:osmose:' + itemType] = context.cleanTagValue(osmoseClosed[itemType].toString());
-	            }
-	        }
+	  return topToolbar;
+	}
 
-	        // remove existing issue counts
-	        for (var key in tags) {
-	            if (key.match(/(^warnings:)|(^resolved:)/)) {
-	                delete tags[key];
-	            }
-	        }
+	var sawVersion = null;
+	var isNewVersion = false;
+	var isNewUser = false;
+	function uiVersion(context) {
+	  var currVersion = context.version;
+	  var matchedVersion = currVersion.match(/\d+\.\d+\.\d+.*/);
 
-	        function addIssueCounts(issues, prefix) {
-	            var issuesByType = utilArrayGroupBy(issues, 'type');
-	            for (var issueType in issuesByType) {
-	                var issuesOfType = issuesByType[issueType];
-	                if (issuesOfType[0].subtype) {
-	                    var issuesBySubtype = utilArrayGroupBy(issuesOfType, 'subtype');
-	                    for (var issueSubtype in issuesBySubtype) {
-	                        var issuesOfSubtype = issuesBySubtype[issueSubtype];
-	                        tags[prefix + ':' + issueType + ':' + issueSubtype] = context.cleanTagValue(issuesOfSubtype.length.toString());
-	                    }
-	                } else {
-	                    tags[prefix + ':' + issueType] = context.cleanTagValue(issuesOfType.length.toString());
-	                }
-	            }
-	        }
+	  if (sawVersion === null && matchedVersion !== null) {
+	    if (corePreferences('sawVersion')) {
+	      isNewUser = false;
+	      isNewVersion = corePreferences('sawVersion') !== currVersion && currVersion.indexOf('-') === -1;
+	    } else {
+	      isNewUser = true;
+	      isNewVersion = true;
+	    }
 
-	        // add counts of warnings generated by the user's edits
-	        var warnings = context.validator()
-	            .getIssuesBySeverity({ what: 'edited', where: 'all', includeIgnored: true, includeDisabledRules: true }).warning;
-	        addIssueCounts(warnings, 'warnings');
+	    corePreferences('sawVersion', currVersion);
+	    sawVersion = currVersion;
+	  }
 
-	        // add counts of issues resolved by the user's edits
-	        var resolvedIssues = context.validator().getResolvedIssues();
-	        addIssueCounts(resolvedIssues, 'resolved');
+	  return function (selection) {
+	    selection.append('a').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD').html(currVersion); // only show new version indicator to users that have used iD before
 
-	        context.changeset = context.changeset.update({ tags: tags });
+	    if (isNewVersion && !isNewUser) {
+	      selection.append('a').attr('class', 'badge').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD/blob/release/CHANGELOG.md#whats-new').call(svgIcon('#maki-gift-11')).call(uiTooltip().title(_t.html('version.whats_new', {
+	        version: currVersion
+	      })).placement('top').scrollContainer(context.container().select('.main-footer-wrap')));
 	    }
+	  };
+	}
 
-	    function render(selection) {
+	function uiZoom(context) {
+	  var zooms = [{
+	    id: 'zoom-in',
+	    icon: 'iD-icon-plus',
+	    title: _t.html('zoom.in'),
+	    action: zoomIn,
+	    disabled: function disabled() {
+	      return !context.map().canZoomIn();
+	    },
+	    disabledTitle: _t.html('zoom.disabled.in'),
+	    key: '+'
+	  }, {
+	    id: 'zoom-out',
+	    icon: 'iD-icon-minus',
+	    title: _t.html('zoom.out'),
+	    action: zoomOut,
+	    disabled: function disabled() {
+	      return !context.map().canZoomOut();
+	    },
+	    disabledTitle: _t.html('zoom.disabled.out'),
+	    key: '-'
+	  }];
 
-	        var osm = context.connection();
-	        if (!osm) { return; }
+	  function zoomIn(d3_event) {
+	    if (d3_event.shiftKey) return;
+	    d3_event.preventDefault();
+	    context.map().zoomIn();
+	  }
 
-	        var header = selection.selectAll('.header')
-	            .data([0]);
+	  function zoomOut(d3_event) {
+	    if (d3_event.shiftKey) return;
+	    d3_event.preventDefault();
+	    context.map().zoomOut();
+	  }
 
-	        var headerTitle = header.enter()
-	            .append('div')
-	            .attr('class', 'header fillL header-container');
+	  function zoomInFurther(d3_event) {
+	    if (d3_event.shiftKey) return;
+	    d3_event.preventDefault();
+	    context.map().zoomInFurther();
+	  }
 
-	        headerTitle
-	            .append('div')
-	            .attr('class', 'header-block header-block-outer');
+	  function zoomOutFurther(d3_event) {
+	    if (d3_event.shiftKey) return;
+	    d3_event.preventDefault();
+	    context.map().zoomOutFurther();
+	  }
 
-	        headerTitle
-	            .append('div')
-	            .attr('class', 'header-block')
-	            .append('h3')
-	            .text(_t('commit.title'));
+	  return function (selection) {
+	    var tooltipBehavior = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(function (d) {
+	      if (d.disabled()) {
+	        return d.disabledTitle;
+	      }
 
-	        headerTitle
-	            .append('div')
-	            .attr('class', 'header-block header-block-outer header-block-close')
-	            .append('button')
-	            .attr('class', 'close')
-	            .on('click', function() {
-	                dispatch$1.call('cancel', this);
-	            })
-	            .call(svgIcon('#iD-icon-close'));
-
-	        var body = selection.selectAll('.body')
-	            .data([0]);
-
-	        body = body.enter()
-	            .append('div')
-	            .attr('class', 'body')
-	            .merge(body);
+	      return d.title;
+	    }).keys(function (d) {
+	      return [d.key];
+	    });
+	    var lastPointerUpType;
+	    var buttons = selection.selectAll('button').data(zooms).enter().append('button').attr('class', function (d) {
+	      return d.id;
+	    }).on('pointerup.editor', function (d3_event) {
+	      lastPointerUpType = d3_event.pointerType;
+	    }).on('click.editor', function (d3_event, d) {
+	      if (!d.disabled()) {
+	        d.action(d3_event);
+	      } else if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
+	        context.ui().flash.duration(2000).iconName('#' + d.icon).iconClass('disabled').label(d.disabledTitle)();
+	      }
 
+	      lastPointerUpType = null;
+	    }).call(tooltipBehavior);
+	    buttons.each(function (d) {
+	      select(this).call(svgIcon('#' + d.icon, 'light'));
+	    });
+	    utilKeybinding.plusKeys.forEach(function (key) {
+	      context.keybinding().on([key], zoomIn);
+	      context.keybinding().on([uiCmd('⌥' + key)], zoomInFurther);
+	    });
+	    utilKeybinding.minusKeys.forEach(function (key) {
+	      context.keybinding().on([key], zoomOut);
+	      context.keybinding().on([uiCmd('⌥' + key)], zoomOutFurther);
+	    });
 
-	        // Changeset Section
-	        var changesetSection = body.selectAll('.changeset-editor')
-	            .data([0]);
+	    function updateButtonStates() {
+	      buttons.classed('disabled', function (d) {
+	        return d.disabled();
+	      }).each(function () {
+	        var selection = select(this);
 
-	        changesetSection = changesetSection.enter()
-	            .append('div')
-	            .attr('class', 'modal-section changeset-editor')
-	            .merge(changesetSection);
+	        if (!selection.select('.tooltip.in').empty()) {
+	          selection.call(tooltipBehavior.updateContent);
+	        }
+	      });
+	    }
 
-	        changesetSection
-	            .call(changesetEditor
-	                .changesetID(context.changeset.id)
-	                .tags(context.changeset.tags)
-	            );
+	    updateButtonStates();
+	    context.map().on('move.uiZoom', updateButtonStates);
+	  };
+	}
 
+	function uiZoomToSelection(context) {
+	  function isDisabled() {
+	    var mode = context.mode();
+	    return !mode || !mode.zoomToSelected;
+	  }
 
-	        // Warnings
-	        body.call(commitWarnings);
+	  var _lastPointerUpType;
 
+	  function pointerup(d3_event) {
+	    _lastPointerUpType = d3_event.pointerType;
+	  }
 
-	        // Upload Explanation
-	        var saveSection = body.selectAll('.save-section')
-	            .data([0]);
+	  function click(d3_event) {
+	    d3_event.preventDefault();
 
-	        saveSection = saveSection.enter()
-	            .append('div')
-	            .attr('class','modal-section save-section fillL')
-	            .merge(saveSection);
+	    if (isDisabled()) {
+	      if (_lastPointerUpType === 'touch' || _lastPointerUpType === 'pen') {
+	        context.ui().flash.duration(2000).iconName('#iD-icon-framed-dot').iconClass('disabled').label(_t.html('inspector.zoom_to.no_selection'))();
+	      }
+	    } else {
+	      var mode = context.mode();
 
-	        var prose = saveSection.selectAll('.commit-info')
-	            .data([0]);
+	      if (mode && mode.zoomToSelected) {
+	        mode.zoomToSelected();
+	      }
+	    }
 
-	        if (prose.enter().size()) {   // first time, make sure to update user details in prose
-	            _userDetails = null;
-	        }
+	    _lastPointerUpType = null;
+	  }
 
-	        prose = prose.enter()
-	            .append('p')
-	            .attr('class', 'commit-info')
-	            .text(_t('commit.upload_explanation'))
-	            .merge(prose);
+	  return function (selection) {
+	    var tooltipBehavior = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(function () {
+	      if (isDisabled()) {
+	        return _t.html('inspector.zoom_to.no_selection');
+	      }
 
-	        // always check if this has changed, but only update prose.html()
-	        // if needed, because it can trigger a style recalculation
-	        osm.userDetails(function(err, user) {
-	            if (err) { return; }
+	      return _t.html('inspector.zoom_to.title');
+	    }).keys([_t('inspector.zoom_to.key')]);
+	    var button = selection.append('button').on('pointerup', pointerup).on('click', click).call(svgIcon('#iD-icon-framed-dot', 'light')).call(tooltipBehavior);
 
-	            if (_userDetails === user) { return; }  // no change
-	            _userDetails = user;
+	    function setEnabledState() {
+	      button.classed('disabled', isDisabled());
 
-	            var userLink = select(document.createElement('div'));
+	      if (!button.select('.tooltip.in').empty()) {
+	        button.call(tooltipBehavior.updateContent);
+	      }
+	    }
 
-	            if (user.image_url) {
-	                userLink
-	                    .append('img')
-	                    .attr('src', user.image_url)
-	                    .attr('class', 'icon pre-text user-icon');
-	            }
+	    context.on('enter.uiZoomToSelection', setEnabledState);
+	    setEnabledState();
+	  };
+	}
 
-	            userLink
-	                .append('a')
-	                .attr('class', 'user-info')
-	                .text(user.display_name)
-	                .attr('href', osm.userURL(user.display_name))
-	                .attr('target', '_blank');
+	function uiPane(id, context) {
+	  var _key;
 
-	            prose
-	                .html(_t('commit.upload_explanation_with_user', { user: userLink.html() }));
-	        });
+	  var _label = '';
+	  var _description = '';
+	  var _iconName = '';
 
+	  var _sections; // array of uiSection objects
 
-	        // Request Review
-	        var requestReview = saveSection.selectAll('.request-review')
-	            .data([0]);
 
-	        // Enter
-	        var requestReviewEnter = requestReview.enter()
-	            .append('div')
-	            .attr('class', 'request-review');
+	  var _paneSelection = select(null);
 
-	        var requestReviewDomId = utilUniqueDomId('commit-input-request-review');
+	  var _paneTooltip;
 
-	        var labelEnter = requestReviewEnter
-	            .append('label')
-	            .attr('for', requestReviewDomId);
+	  var pane = {
+	    id: id
+	  };
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .attr('id', requestReviewDomId);
+	  pane.label = function (val) {
+	    if (!arguments.length) return _label;
+	    _label = val;
+	    return pane;
+	  };
 
-	        labelEnter
-	            .append('span')
-	            .text(_t('commit.request_review'));
+	  pane.key = function (val) {
+	    if (!arguments.length) return _key;
+	    _key = val;
+	    return pane;
+	  };
 
-	        // Update
-	        requestReview = requestReview
-	            .merge(requestReviewEnter);
+	  pane.description = function (val) {
+	    if (!arguments.length) return _description;
+	    _description = val;
+	    return pane;
+	  };
 
-	        var requestReviewInput = requestReview.selectAll('input')
-	            .property('checked', isReviewRequested(context.changeset.tags))
-	            .on('change', toggleRequestReview);
+	  pane.iconName = function (val) {
+	    if (!arguments.length) return _iconName;
+	    _iconName = val;
+	    return pane;
+	  };
 
+	  pane.sections = function (val) {
+	    if (!arguments.length) return _sections;
+	    _sections = val;
+	    return pane;
+	  };
 
-	        // Buttons
-	        var buttonSection = saveSection.selectAll('.buttons')
-	            .data([0]);
+	  pane.selection = function () {
+	    return _paneSelection;
+	  };
 
-	        // enter
-	        var buttonEnter = buttonSection.enter()
-	            .append('div')
-	            .attr('class', 'buttons fillL');
+	  function hidePane() {
+	    context.ui().togglePanes();
+	  }
 
-	        buttonEnter
-	            .append('button')
-	            .attr('class', 'secondary-action button cancel-button')
-	            .append('span')
-	            .attr('class', 'label')
-	            .text(_t('commit.cancel'));
+	  pane.togglePane = function (d3_event) {
+	    if (d3_event) d3_event.preventDefault();
 
-	        var uploadButton = buttonEnter
-	            .append('button')
-	            .attr('class', 'action button save-button');
+	    _paneTooltip.hide();
 
-	        uploadButton.append('span')
-	            .attr('class', 'label')
-	            .text(_t('commit.save'));
+	    context.ui().togglePanes(!_paneSelection.classed('shown') ? _paneSelection : undefined);
+	  };
 
-	        var uploadBlockerTooltipText = getUploadBlockerMessage();
+	  pane.renderToggleButton = function (selection) {
+	    if (!_paneTooltip) {
+	      _paneTooltip = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(_description).keys([_key]);
+	    }
 
-	        // update
-	        buttonSection = buttonSection
-	            .merge(buttonEnter);
+	    selection.append('button').on('click', pane.togglePane).call(svgIcon('#' + _iconName, 'light')).call(_paneTooltip);
+	  };
 
-	        buttonSection.selectAll('.cancel-button')
-	            .on('click.cancel', function() {
-	                dispatch$1.call('cancel', this);
-	            });
+	  pane.renderContent = function (selection) {
+	    // override to fully customize content
+	    if (_sections) {
+	      _sections.forEach(function (section) {
+	        selection.call(section.render);
+	      });
+	    }
+	  };
 
-	        buttonSection.selectAll('.save-button')
-	            .classed('disabled', uploadBlockerTooltipText !== null)
-	            .on('click.save', function() {
-	                if (!select(this).classed('disabled')) {
-	                    this.blur();    // avoid keeping focus on the button - #4641
-	                    context.uploader().save(context.changeset);
-	                }
-	            });
+	  pane.renderPane = function (selection) {
+	    _paneSelection = selection.append('div').attr('class', 'fillL map-pane hide ' + id + '-pane').attr('pane', id);
 
-	        // remove any existing tooltip
-	        uiTooltip().destroyAny(buttonSection.selectAll('.save-button'));
+	    var heading = _paneSelection.append('div').attr('class', 'pane-heading');
 
-	        if (uploadBlockerTooltipText) {
-	            buttonSection.selectAll('.save-button')
-	                .call(uiTooltip().title(uploadBlockerTooltipText).placement('top'));
-	        }
+	    heading.append('h2').html(_label);
+	    heading.append('button').on('click', hidePane).call(svgIcon('#iD-icon-close'));
 
-	        // Raw Tag Editor
-	        var tagSection = body.selectAll('.tag-section.raw-tag-editor')
-	            .data([0]);
+	    _paneSelection.append('div').attr('class', 'pane-content').call(pane.renderContent);
 
-	        tagSection = tagSection.enter()
-	            .append('div')
-	            .attr('class', 'modal-section tag-section raw-tag-editor')
-	            .merge(tagSection);
+	    if (_key) {
+	      context.keybinding().on(_key, pane.togglePane);
+	    }
+	  };
 
-	        tagSection
-	            .call(rawTagEditor
-	                .tags(Object.assign({}, context.changeset.tags))   // shallow copy
-	                .render
-	            );
+	  return pane;
+	}
 
-	        var changesSection = body.selectAll('.commit-changes-section')
-	            .data([0]);
+	function uiSectionBackgroundDisplayOptions(context) {
+	  var section = uiSection('background-display-options', context).label(_t.html('background.display_options')).disclosureContent(renderDisclosureContent);
 
-	        changesSection = changesSection.enter()
-	            .append('div')
-	            .attr('class', 'modal-section commit-changes-section')
-	            .merge(changesSection);
+	  var _detected = utilDetect();
 
-	        // Change summary
-	        changesSection.call(commitChanges.render);
+	  var _storedOpacity = corePreferences('background-opacity');
 
+	  var _minVal = 0;
 
-	        function toggleRequestReview() {
-	            var rr = requestReviewInput.property('checked');
-	            updateChangeset({ review_requested: (rr ? 'yes' : undefined) });
+	  var _maxVal = _detected.cssfilters ? 3 : 1;
 
-	            tagSection
-	                .call(rawTagEditor
-	                    .tags(Object.assign({}, context.changeset.tags))   // shallow copy
-	                    .render
-	                );
-	        }
-	    }
+	  var _sliders = _detected.cssfilters ? ['brightness', 'contrast', 'saturation', 'sharpness'] : ['brightness'];
 
+	  var _options = {
+	    brightness: _storedOpacity !== null ? +_storedOpacity : 1,
+	    contrast: 1,
+	    saturation: 1,
+	    sharpness: 1
+	  };
 
-	    function getUploadBlockerMessage() {
-	        var errors = context.validator()
-	            .getIssuesBySeverity({ what: 'edited', where: 'all' }).error;
+	  function clamp(x, min, max) {
+	    return Math.max(min, Math.min(x, max));
+	  }
 
-	        if (errors.length) {
-	            return _t('commit.outstanding_errors_message', { count: errors.length });
+	  function updateValue(d, val) {
+	    val = clamp(val, _minVal, _maxVal);
+	    _options[d] = val;
+	    context.background()[d](val);
 
-	        } else {
-	            var hasChangesetComment = context.changeset && context.changeset.tags.comment && context.changeset.tags.comment.trim().length;
-	            if (!hasChangesetComment) {
-	                return _t('commit.comment_needed_message');
-	            }
-	        }
-	        return null;
+	    if (d === 'brightness') {
+	      corePreferences('background-opacity', val);
 	    }
 
+	    section.reRender();
+	  }
 
-	    function changeTags(_, changed, onInput) {
-	        if (changed.hasOwnProperty('comment')) {
-	            if (changed.comment === undefined) {
-	                changed.comment = '';
-	            }
-	            if (!onInput) {
-	                corePreferences('comment', changed.comment);
-	                corePreferences('commentDate', Date.now());
-	            }
-	        }
-	        if (changed.hasOwnProperty('source')) {
-	            if (changed.source === undefined) {
-	                corePreferences('source', null);
-	            } else if (!onInput) {
-	                corePreferences('source', changed.source);
-	                corePreferences('commentDate', Date.now());
-	            }
-	        }
-	        // no need to update `prefs` for `hashtags` here since it's done in `updateChangeset`
-
-	        updateChangeset(changed, onInput);
-
-	        if (_selection) {
-	            _selection.call(render);
-	        }
-	    }
+	  function renderDisclosureContent(selection) {
+	    var container = selection.selectAll('.display-options-container').data([0]);
+	    var containerEnter = container.enter().append('div').attr('class', 'display-options-container controls-list'); // add slider controls
 
+	    var slidersEnter = containerEnter.selectAll('.display-control').data(_sliders).enter().append('div').attr('class', function (d) {
+	      return 'display-control display-control-' + d;
+	    });
+	    slidersEnter.append('h5').html(function (d) {
+	      return _t.html('background.' + d);
+	    }).append('span').attr('class', function (d) {
+	      return 'display-option-value display-option-value-' + d;
+	    });
+	    var sildersControlEnter = slidersEnter.append('div').attr('class', 'control-wrap');
+	    sildersControlEnter.append('input').attr('class', function (d) {
+	      return 'display-option-input display-option-input-' + d;
+	    }).attr('type', 'range').attr('min', _minVal).attr('max', _maxVal).attr('step', '0.05').on('input', function (d3_event, d) {
+	      var val = select(this).property('value');
+
+	      if (!val && d3_event && d3_event.target) {
+	        val = d3_event.target.value;
+	      }
 
-	    function findHashtags(tags, commentOnly) {
-	        var detectedHashtags = commentHashtags();
+	      updateValue(d, val);
+	    });
+	    sildersControlEnter.append('button').attr('title', _t('background.reset')).attr('class', function (d) {
+	      return 'display-option-reset display-option-reset-' + d;
+	    }).on('click', function (d3_event, d) {
+	      if (d3_event.button !== 0) return;
+	      updateValue(d, 1);
+	    }).call(svgIcon('#iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo'))); // reset all button
+
+	    containerEnter.append('a').attr('class', 'display-option-resetlink').attr('href', '#').html(_t.html('background.reset_all')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+
+	      for (var i = 0; i < _sliders.length; i++) {
+	        updateValue(_sliders[i], 1);
+	      }
+	    }); // update
 
-	        if (detectedHashtags.length) {
-	            // always remove stored hashtags if there are hashtags in the comment - #4304
-	            corePreferences('hashtags', null);
-	        }
-	        if (!detectedHashtags.length || !commentOnly) {
-	            detectedHashtags = detectedHashtags.concat(hashtagHashtags());
-	        }
+	    container = containerEnter.merge(container);
+	    container.selectAll('.display-option-input').property('value', function (d) {
+	      return _options[d];
+	    });
+	    container.selectAll('.display-option-value').html(function (d) {
+	      return Math.floor(_options[d] * 100) + '%';
+	    });
+	    container.selectAll('.display-option-reset').classed('disabled', function (d) {
+	      return _options[d] === 1;
+	    }); // first time only, set brightness if needed
 
-	        var allLowerCase = new Set();
-	        return detectedHashtags.filter(function(hashtag) {
-	            // Compare tags as lowercase strings, but keep original case tags
-	            var lowerCase = hashtag.toLowerCase();
-	            if (!allLowerCase.has(lowerCase)) {
-	                allLowerCase.add(lowerCase);
-	                return true;
-	            }
-	            return false;
-	        });
+	    if (containerEnter.size() && _options.brightness !== 1) {
+	      context.background().brightness(_options.brightness);
+	    }
+	  }
 
-	        // Extract hashtags from `comment`
-	        function commentHashtags() {
-	            var matches = (tags.comment || '')
-	                .replace(/http\S*/g, '')  // drop anything that looks like a URL - #4289
-	                .match(hashtagRegex);
+	  return section;
+	}
 
-	            return matches || [];
-	        }
+	function uiSettingsCustomBackground() {
+	  var dispatch = dispatch$8('change');
+
+	  function render(selection) {
+	    // keep separate copies of original and current settings
+	    var _origSettings = {
+	      template: corePreferences('background-custom-template')
+	    };
+	    var _currSettings = {
+	      template: corePreferences('background-custom-template')
+	    };
+	    var example = 'https://{switch:a,b,c}.tile.openstreetmap.org/{zoom}/{x}/{y}.png';
+	    var modal = uiConfirm(selection).okButton();
+	    modal.classed('settings-modal settings-custom-background', true);
+	    modal.select('.modal-section.header').append('h3').html(_t.html('settings.custom_background.header'));
+	    var textSection = modal.select('.modal-section.message-text');
+	    var instructions = "".concat(_t.html('settings.custom_background.instructions.info'), "\n") + '\n' + "#### ".concat(_t.html('settings.custom_background.instructions.wms.tokens_label'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.proj'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.wkid'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.dimensions'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.bbox'), "\n") + '\n' + "#### ".concat(_t.html('settings.custom_background.instructions.tms.tokens_label'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.xyz'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.flipped_y'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.switch'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.quadtile'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.scale_factor'), "\n") + '\n' + "#### ".concat(_t.html('settings.custom_background.instructions.example'), "\n") + "`".concat(example, "`");
+	    textSection.append('div').attr('class', 'instructions-template').html(marked_1(instructions));
+	    textSection.append('textarea').attr('class', 'field-template').attr('placeholder', _t('settings.custom_background.template.placeholder')).call(utilNoAuto).property('value', _currSettings.template); // insert a cancel button
+
+	    var buttonSection = modal.select('.modal-section.buttons');
+	    buttonSection.insert('button', '.ok-button').attr('class', 'button cancel-button secondary-action').html(_t.html('confirm.cancel'));
+	    buttonSection.select('.cancel-button').on('click.cancel', clickCancel);
+	    buttonSection.select('.ok-button').attr('disabled', isSaveDisabled).on('click.save', clickSave);
+
+	    function isSaveDisabled() {
+	      return null;
+	    } // restore the original template
 
-	        // Extract and clean hashtags from `hashtags`
-	        function hashtagHashtags() {
-	            var matches = (tags.hashtags || '')
-	                .split(/[,;\s]+/)
-	                .map(function (s) {
-	                    if (s[0] !== '#') { s = '#' + s; }    // prepend '#'
-	                    var matched = s.match(hashtagRegex);
-	                    return matched && matched[0];
-	                }).filter(Boolean);                       // exclude falsy
 
-	            return matches || [];
-	        }
-	    }
+	    function clickCancel() {
+	      textSection.select('.field-template').property('value', _origSettings.template);
+	      corePreferences('background-custom-template', _origSettings.template);
+	      this.blur();
+	      modal.close();
+	    } // accept the current template
 
 
-	    function isReviewRequested(tags) {
-	        var rr = tags.review_requested;
-	        if (rr === undefined) { return false; }
-	        rr = rr.trim().toLowerCase();
-	        return !(rr === '' || rr === 'no');
+	    function clickSave() {
+	      _currSettings.template = textSection.select('.field-template').property('value');
+	      corePreferences('background-custom-template', _currSettings.template);
+	      this.blur();
+	      modal.close();
+	      dispatch.call('change', this, _currSettings);
 	    }
+	  }
 
+	  return utilRebind(render, dispatch, 'on');
+	}
 
-	    function updateChangeset(changed, onInput) {
-	        var tags = Object.assign({}, context.changeset.tags);   // shallow copy
-
-	        Object.keys(changed).forEach(function(k) {
-	            var v = changed[k];
-	            k = context.cleanTagKey(k);
-	            if (readOnlyTags.indexOf(k) !== -1) { return; }
-
-	            if (k !== '' && v !== undefined) {
-	                if (onInput) {
-	                    tags[k] = v;
-	                } else {
-	                    tags[k] = context.cleanTagValue(v);
-	                }
-	            } else {
-	                delete tags[k];
-	            }
-	        });
+	function uiSectionBackgroundList(context) {
+	  var _backgroundList = select(null);
 
-	        if (!onInput) {
-	            // when changing the comment, override hashtags with any found in comment.
-	            var commentOnly = changed.hasOwnProperty('comment') && (changed.comment !== '');
-	            var arr = findHashtags(tags, commentOnly);
-	            if (arr.length) {
-	                tags.hashtags = context.cleanTagValue(arr.join(';'));
-	                corePreferences('hashtags', tags.hashtags);
-	            } else {
-	                delete tags.hashtags;
-	                corePreferences('hashtags', null);
-	            }
-	        }
+	  var _customSource = context.background().findSource('custom');
 
-	        // always update userdetails, just in case user reauthenticates as someone else
-	        if (_userDetails && _userDetails.changesets_count !== undefined) {
-	            var changesetsCount = parseInt(_userDetails.changesets_count, 10) + 1;  // #4283
-	            tags.changesets_count = String(changesetsCount);
+	  var _settingsCustomBackground = uiSettingsCustomBackground().on('change', customChanged);
 
-	            // first 100 edits - new user
-	            if (changesetsCount <= 100) {
-	                var s;
-	                s = corePreferences('walkthrough_completed');
-	                if (s) {
-	                    tags['ideditor:walkthrough_completed'] = s;
-	                }
+	  var section = uiSection('background-list', context).label(_t.html('background.backgrounds')).disclosureContent(renderDisclosureContent);
 
-	                s = corePreferences('walkthrough_progress');
-	                if (s) {
-	                    tags['ideditor:walkthrough_progress'] = s;
-	                }
+	  function previousBackgroundID() {
+	    return corePreferences('background-last-used-toggle');
+	  }
 
-	                s = corePreferences('walkthrough_started');
-	                if (s) {
-	                    tags['ideditor:walkthrough_started'] = s;
-	                }
-	            }
-	        } else {
-	            delete tags.changesets_count;
-	        }
+	  function renderDisclosureContent(selection) {
+	    // the background list
+	    var container = selection.selectAll('.layer-background-list').data([0]);
+	    _backgroundList = container.enter().append('ul').attr('class', 'layer-list layer-background-list').attr('dir', 'auto').merge(container); // add minimap toggle below list
 
-	        if (!fastDeepEqual(context.changeset.tags, tags)) {
-	            context.changeset = context.changeset.update({ tags: tags });
-	        }
-	    }
+	    var bgExtrasListEnter = selection.selectAll('.bg-extras-list').data([0]).enter().append('ul').attr('class', 'layer-list bg-extras-list');
+	    var minimapLabelEnter = bgExtrasListEnter.append('li').attr('class', 'minimap-toggle-item').append('label').call(uiTooltip().title(_t.html('background.minimap.tooltip')).keys([_t('background.minimap.key')]).placement('top'));
+	    minimapLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+	      d3_event.preventDefault();
+	      uiMapInMap.toggle();
+	    });
+	    minimapLabelEnter.append('span').html(_t.html('background.minimap.description'));
+	    var panelLabelEnter = bgExtrasListEnter.append('li').attr('class', 'background-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('background.panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.background.key'))]).placement('top'));
+	    panelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.ui().info.toggle('background');
+	    });
+	    panelLabelEnter.append('span').html(_t.html('background.panel.description'));
+	    var locPanelLabelEnter = bgExtrasListEnter.append('li').attr('class', 'location-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('background.location_panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.location.key'))]).placement('top'));
+	    locPanelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.ui().info.toggle('location');
+	    });
+	    locPanelLabelEnter.append('span').html(_t.html('background.location_panel.description')); // "Info / Report a Problem" link
 
+	    selection.selectAll('.imagery-faq').data([0]).enter().append('div').attr('class', 'imagery-faq').append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/openstreetmap/iD/blob/develop/FAQ.md#how-can-i-report-an-issue-with-background-imagery').append('span').html(_t.html('background.imagery_problem_faq'));
 
-	    commit.reset = function() {
-	        context.changeset = null;
-	    };
+	    _backgroundList.call(drawListItems, 'radio', function (d3_event, d) {
+	      chooseBackground(d);
+	    }, function (d) {
+	      return !d.isHidden() && !d.overlay;
+	    });
+	  }
 
+	  function setTooltips(selection) {
+	    selection.each(function (d, i, nodes) {
+	      var item = select(this).select('label');
+	      var span = item.select('span');
+	      var placement = i < nodes.length / 2 ? 'bottom' : 'top';
+	      var description = d.description();
+	      var isOverflowing = span.property('clientWidth') !== span.property('scrollWidth');
+	      item.call(uiTooltip().destroyAny);
 
-	    return utilRebind(commit, dispatch$1, 'on');
-	}
+	      if (d.id === previousBackgroundID()) {
+	        item.call(uiTooltip().placement(placement).title('<div>' + _t.html('background.switch') + '</div>').keys([uiCmd('⌘' + _t('background.key'))]));
+	      } else if (description || isOverflowing) {
+	        item.call(uiTooltip().placement(placement).title(description || d.label()));
+	      }
+	    });
+	  }
 
-	var RADIUS = 6378137;
-	var FLATTENING = 1/298.257223563;
-	var POLAR_RADIUS$1 = 6356752.3142;
+	  function drawListItems(layerList, type, change, filter) {
+	    var sources = context.background().sources(context.map().extent(), context.map().zoom(), true).filter(filter).sort(function (a, b) {
+	      return a.best() && !b.best() ? -1 : b.best() && !a.best() ? 1 : d3_descending(a.area(), b.area()) || d3_ascending(a.name(), b.name()) || 0;
+	    });
+	    var layerLinks = layerList.selectAll('li') // We have to be a bit inefficient about reordering the list since
+	    // arrow key navigation of radio values likes to work in the order
+	    // they were added, not the display document order.
+	    .data(sources, function (d, i) {
+	      return d.id + '---' + i;
+	    });
+	    layerLinks.exit().remove();
+	    var enter = layerLinks.enter().append('li').classed('layer-custom', function (d) {
+	      return d.id === 'custom';
+	    }).classed('best', function (d) {
+	      return d.best();
+	    });
+	    var label = enter.append('label');
+	    label.append('input').attr('type', type).attr('name', 'background-layer').attr('value', function (d) {
+	      return d.id;
+	    }).on('change', change);
+	    label.append('span').html(function (d) {
+	      return d.label();
+	    });
+	    enter.filter(function (d) {
+	      return d.id === 'custom';
+	    }).append('button').attr('class', 'layer-browse').call(uiTooltip().title(_t.html('settings.custom_background.tooltip')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      editCustom();
+	    }).call(svgIcon('#iD-icon-more'));
+	    enter.filter(function (d) {
+	      return d.best();
+	    }).append('div').attr('class', 'best').call(uiTooltip().title(_t.html('background.best_imagery')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).append('span').html('&#9733;');
+	    layerList.call(updateLayerSelections);
+	  }
 
-	var wgs84 = {
-		RADIUS: RADIUS,
-		FLATTENING: FLATTENING,
-		POLAR_RADIUS: POLAR_RADIUS$1
-	};
+	  function updateLayerSelections(selection) {
+	    function active(d) {
+	      return context.background().showsLayer(d);
+	    }
 
-	var geometry_1 = geometry;
-	var ring = ringArea;
+	    selection.selectAll('li').classed('active', active).classed('switch', function (d) {
+	      return d.id === previousBackgroundID();
+	    }).call(setTooltips).selectAll('input').property('checked', active);
+	  }
 
-	function geometry(_) {
-	    var area = 0, i;
-	    switch (_.type) {
-	        case 'Polygon':
-	            return polygonArea(_.coordinates);
-	        case 'MultiPolygon':
-	            for (i = 0; i < _.coordinates.length; i++) {
-	                area += polygonArea(_.coordinates[i]);
-	            }
-	            return area;
-	        case 'Point':
-	        case 'MultiPoint':
-	        case 'LineString':
-	        case 'MultiLineString':
-	            return 0;
-	        case 'GeometryCollection':
-	            for (i = 0; i < _.geometries.length; i++) {
-	                area += geometry(_.geometries[i]);
-	            }
-	            return area;
+	  function chooseBackground(d) {
+	    if (d.id === 'custom' && !d.template()) {
+	      return editCustom();
 	    }
-	}
 
-	function polygonArea(coords) {
-	    var area = 0;
-	    if (coords && coords.length > 0) {
-	        area += Math.abs(ringArea(coords[0]));
-	        for (var i = 1; i < coords.length; i++) {
-	            area -= Math.abs(ringArea(coords[i]));
-	        }
-	    }
-	    return area;
-	}
+	    var previousBackground = context.background().baseLayerSource();
+	    corePreferences('background-last-used-toggle', previousBackground.id);
+	    corePreferences('background-last-used', d.id);
+	    context.background().baseLayerSource(d);
+	  }
 
-	/**
-	 * Calculate the approximate area of the polygon were it projected onto
-	 *     the earth.  Note that this area will be positive if ring is oriented
-	 *     clockwise, otherwise it will be negative.
-	 *
-	 * Reference:
-	 * Robert. G. Chamberlain and William H. Duquette, "Some Algorithms for
-	 *     Polygons on a Sphere", JPL Publication 07-03, Jet Propulsion
-	 *     Laboratory, Pasadena, CA, June 2007 http://trs-new.jpl.nasa.gov/dspace/handle/2014/40409
-	 *
-	 * Returns:
-	 * {float} The approximate signed geodesic area of the polygon in square
-	 *     meters.
-	 */
+	  function customChanged(d) {
+	    if (d && d.template) {
+	      _customSource.template(d.template);
 
-	function ringArea(coords) {
-	    var p1, p2, p3, lowerIndex, middleIndex, upperIndex, i,
-	    area = 0,
-	    coordsLength = coords.length;
-
-	    if (coordsLength > 2) {
-	        for (i = 0; i < coordsLength; i++) {
-	            if (i === coordsLength - 2) {// i = N-2
-	                lowerIndex = coordsLength - 2;
-	                middleIndex = coordsLength -1;
-	                upperIndex = 0;
-	            } else if (i === coordsLength - 1) {// i = N-1
-	                lowerIndex = coordsLength - 1;
-	                middleIndex = 0;
-	                upperIndex = 1;
-	            } else { // i = 0 to N-3
-	                lowerIndex = i;
-	                middleIndex = i+1;
-	                upperIndex = i+2;
-	            }
-	            p1 = coords[lowerIndex];
-	            p2 = coords[middleIndex];
-	            p3 = coords[upperIndex];
-	            area += ( rad(p3[0]) - rad(p1[0]) ) * Math.sin( rad(p2[1]));
-	        }
+	      chooseBackground(_customSource);
+	    } else {
+	      _customSource.template('');
 
-	        area = area * wgs84.RADIUS * wgs84.RADIUS / 2;
+	      chooseBackground(context.background().findSource('none'));
 	    }
+	  }
 
-	    return area;
-	}
+	  function editCustom() {
+	    context.container().call(_settingsCustomBackground);
+	  }
 
-	function rad(_) {
-	    return _ * Math.PI / 180;
+	  context.background().on('change.background_list', function () {
+	    _backgroundList.call(updateLayerSelections);
+	  });
+	  context.map().on('move.background_list', debounce(function () {
+	    // layers in-view may have changed due to map move
+	    window.requestIdleCallback(section.reRender);
+	  }, 1000));
+	  return section;
 	}
 
-	var geojsonArea = {
-		geometry: geometry_1,
-		ring: ring
-	};
-
-	function toRadians(angleInDegrees) {
-	  return (angleInDegrees * Math.PI) / 180;
-	}
+	function uiSectionBackgroundOffset(context) {
+	  var section = uiSection('background-offset', context).label(_t.html('background.fix_misalignment')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
 
-	function toDegrees(angleInRadians) {
-	  return (angleInRadians * 180) / Math.PI;
-	}
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	function offset(c1, distance, bearing) {
-	  var lat1 = toRadians(c1[1]);
-	  var lon1 = toRadians(c1[0]);
-	  var dByR = distance / 6378137; // distance divided by 6378137 (radius of the earth) wgs84
-	  var lat = Math.asin(
-	    Math.sin(lat1) * Math.cos(dByR) +
-	      Math.cos(lat1) * Math.sin(dByR) * Math.cos(bearing)
-	  );
-	  var lon =
-	    lon1 +
-	    Math.atan2(
-	      Math.sin(bearing) * Math.sin(dByR) * Math.cos(lat1),
-	      Math.cos(dByR) - Math.sin(lat1) * Math.sin(lat)
-	    );
-	  return [toDegrees(lon), toDegrees(lat)];
-	}
+	  var _directions = [['top', [0, -0.5]], ['left', [-0.5, 0]], ['right', [0.5, 0]], ['bottom', [0, 0.5]]];
 
-	function validateCenter(center) {
-	  var validCenterLengths = [2, 3];
-	  if (!Array.isArray(center) || !validCenterLengths.includes(center.length)) {
-	    throw new Error("ERROR! Center has to be an array of length two or three");
-	  }
-	  var lng = center[0];
-	  var lat = center[1];
-	  if (typeof lng !== "number" || typeof lat !== "number") {
-	    throw new Error(
-	      ("ERROR! Longitude and Latitude has to be numbers but where " + (typeof lng) + " and " + (typeof lat))
-	    );
-	  }
-	  if (lng > 180 || lng < -180) {
-	    throw new Error(
-	      ("ERROR! Longitude has to be between -180 and 180 but was " + lng)
-	    );
+	  function updateValue() {
+	    var meters = geoOffsetToMeters(context.background().offset());
+	    var x = +meters[0].toFixed(2);
+	    var y = +meters[1].toFixed(2);
+	    context.container().selectAll('.nudge-inner-rect').select('input').classed('error', false).property('value', x + ', ' + y);
+	    context.container().selectAll('.nudge-reset').classed('disabled', function () {
+	      return x === 0 && y === 0;
+	    });
 	  }
 
-	  if (lat > 90 || lat < -90) {
-	    throw new Error(
-	      ("ERROR! Latitude has to be between -90 and 90 but was " + lat)
-	    );
+	  function resetOffset() {
+	    context.background().offset([0, 0]);
+	    updateValue();
 	  }
-	}
 
-	function validateRadius(radius) {
-	  if (typeof radius !== "number") {
-	    throw new Error(
-	      ("ERROR! Radius has to be a positive number but was: " + (typeof radius))
-	    );
+	  function nudge(d) {
+	    context.background().nudge(d, context.map().zoom());
+	    updateValue();
 	  }
 
-	  if (radius <= 0) {
-	    throw new Error(
-	      ("ERROR! Radius has to be a positive number but was: " + radius)
-	    );
+	  function inputOffset() {
+	    var input = select(this);
+	    var d = input.node().value;
+	    if (d === '') return resetOffset();
+	    d = d.replace(/;/g, ',').split(',').map(function (n) {
+	      // if n is NaN, it will always get mapped to false.
+	      return !isNaN(n) && n;
+	    });
+
+	    if (d.length !== 2 || !d[0] || !d[1]) {
+	      input.classed('error', true);
+	      return;
+	    }
+
+	    context.background().offset(geoMetersToOffset(d));
+	    updateValue();
 	  }
-	}
 
-	function validateNumberOfSegments(numberOfSegments) {
-	  if (typeof numberOfSegments !== "number" && numberOfSegments !== undefined) {
-	    throw new Error(
-	      ("ERROR! Number of segments has to be a number but was: " + (typeof numberOfSegments))
-	    );
+	  function dragOffset(d3_event) {
+	    if (d3_event.button !== 0) return;
+	    var origin = [d3_event.clientX, d3_event.clientY];
+	    var pointerId = d3_event.pointerId || 'mouse';
+	    context.container().append('div').attr('class', 'nudge-surface');
+	    select(window).on(_pointerPrefix + 'move.drag-bg-offset', pointermove).on(_pointerPrefix + 'up.drag-bg-offset', pointerup);
+
+	    if (_pointerPrefix === 'pointer') {
+	      select(window).on('pointercancel.drag-bg-offset', pointerup);
+	    }
+
+	    function pointermove(d3_event) {
+	      if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+	      var latest = [d3_event.clientX, d3_event.clientY];
+	      var d = [-(origin[0] - latest[0]) / 4, -(origin[1] - latest[1]) / 4];
+	      origin = latest;
+	      nudge(d);
+	    }
+
+	    function pointerup(d3_event) {
+	      if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+	      if (d3_event.button !== 0) return;
+	      context.container().selectAll('.nudge-surface').remove();
+	      select(window).on('.drag-bg-offset', null);
+	    }
 	  }
 
-	  if (numberOfSegments < 3) {
-	    throw new Error(
-	      ("ERROR! Number of segments has to be at least 3 but was: " + numberOfSegments)
-	    );
+	  function renderDisclosureContent(selection) {
+	    var container = selection.selectAll('.nudge-container').data([0]);
+	    var containerEnter = container.enter().append('div').attr('class', 'nudge-container');
+	    containerEnter.append('div').attr('class', 'nudge-instructions').html(_t.html('background.offset'));
+	    var nudgeWrapEnter = containerEnter.append('div').attr('class', 'nudge-controls-wrap');
+	    var nudgeEnter = nudgeWrapEnter.append('div').attr('class', 'nudge-outer-rect').on(_pointerPrefix + 'down', dragOffset);
+	    nudgeEnter.append('div').attr('class', 'nudge-inner-rect').append('input').attr('type', 'text').on('change', inputOffset);
+	    nudgeWrapEnter.append('div').selectAll('button').data(_directions).enter().append('button').attr('class', function (d) {
+	      return d[0] + ' nudge';
+	    }).on('click', function (d3_event, d) {
+	      nudge(d[1]);
+	    });
+	    nudgeWrapEnter.append('button').attr('title', _t('background.reset')).attr('class', 'nudge-reset disabled').on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      resetOffset();
+	    }).call(svgIcon('#iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')));
+	    updateValue();
 	  }
+
+	  context.background().on('change.backgroundOffset-update', updateValue);
+	  return section;
 	}
 
-	function validateInput(ref) {
-	  var center = ref.center;
-	  var radius = ref.radius;
-	  var numberOfSegments = ref.numberOfSegments;
+	function uiSectionOverlayList(context) {
+	  var section = uiSection('overlay-list', context).label(_t.html('background.overlays')).disclosureContent(renderDisclosureContent);
 
-	  validateCenter(center);
-	  validateRadius(radius);
-	  validateNumberOfSegments(numberOfSegments);
-	}
+	  var _overlayList = select(null);
 
-	var circleToPolygon = function circleToPolygon(center, radius, numberOfSegments) {
-	  var n = numberOfSegments ? numberOfSegments : 32;
+	  function setTooltips(selection) {
+	    selection.each(function (d, i, nodes) {
+	      var item = select(this).select('label');
+	      var span = item.select('span');
+	      var placement = i < nodes.length / 2 ? 'bottom' : 'top';
+	      var description = d.description();
+	      var isOverflowing = span.property('clientWidth') !== span.property('scrollWidth');
+	      item.call(uiTooltip().destroyAny);
 
-	  // validateInput() throws error on invalid input and do nothing on valid input
-	  validateInput({ center: center, radius: radius, numberOfSegments: numberOfSegments });
+	      if (description || isOverflowing) {
+	        item.call(uiTooltip().placement(placement).title(description || d.name()));
+	      }
+	    });
+	  }
 
-	  var coordinates = [];
-	  for (var i = 0; i < n; ++i) {
-	    coordinates.push(offset(center, radius, (2 * Math.PI * -i) / n));
+	  function updateLayerSelections(selection) {
+	    function active(d) {
+	      return context.background().showsLayer(d);
+	    }
+
+	    selection.selectAll('li').classed('active', active).call(setTooltips).selectAll('input').property('checked', active);
 	  }
-	  coordinates.push(coordinates[0]);
 
-	  return {
-	    type: "Polygon",
-	    coordinates: [coordinates]
-	  };
-	};
+	  function chooseOverlay(d3_event, d) {
+	    d3_event.preventDefault();
+	    context.background().toggleOverlayLayer(d);
 
-	var geojsonPrecision = createCommonjsModule(function (module) {
-	(function() {
+	    _overlayList.call(updateLayerSelections);
 
-	  function parse(t, coordinatePrecision, extrasPrecision) {
+	    document.activeElement.blur();
+	  }
 
-	    function point(p) {
-	      return p.map(function(e, index) {
-	        if (index < 2) {
-	            return 1 * e.toFixed(coordinatePrecision);
-	        } else {
-	            return 1 * e.toFixed(extrasPrecision);
-	        }
-	      });
-	    }
+	  function drawListItems(layerList, type, change, filter) {
+	    var sources = context.background().sources(context.map().extent(), context.map().zoom(), true).filter(filter);
+	    var layerLinks = layerList.selectAll('li').data(sources, function (d) {
+	      return d.name();
+	    });
+	    layerLinks.exit().remove();
+	    var enter = layerLinks.enter().append('li');
+	    var label = enter.append('label');
+	    label.append('input').attr('type', type).attr('name', 'layers').on('change', change);
+	    label.append('span').html(function (d) {
+	      return d.label();
+	    });
+	    layerList.selectAll('li').sort(sortSources);
+	    layerList.call(updateLayerSelections);
 
-	    function multi(l) {
-	      return l.map(point);
+	    function sortSources(a, b) {
+	      return a.best() && !b.best() ? -1 : b.best() && !a.best() ? 1 : d3_descending(a.area(), b.area()) || d3_ascending(a.name(), b.name()) || 0;
 	    }
+	  }
 
-	    function poly(p) {
-	      return p.map(multi);
-	    }
+	  function renderDisclosureContent(selection) {
+	    var container = selection.selectAll('.layer-overlay-list').data([0]);
+	    _overlayList = container.enter().append('ul').attr('class', 'layer-list layer-overlay-list').attr('dir', 'auto').merge(container);
 
-	    function multiPoly(m) {
-	      return m.map(poly);
-	    }
+	    _overlayList.call(drawListItems, 'checkbox', chooseOverlay, function (d) {
+	      return !d.isHidden() && d.overlay;
+	    });
+	  }
 
-	    function geometry(obj) {
-	      if (!obj) {
-	        return {};
-	      }
-	      
-	      switch (obj.type) {
-	        case "Point":
-	          obj.coordinates = point(obj.coordinates);
-	          return obj;
-	        case "LineString":
-	        case "MultiPoint":
-	          obj.coordinates = multi(obj.coordinates);
-	          return obj;
-	        case "Polygon":
-	        case "MultiLineString":
-	          obj.coordinates = poly(obj.coordinates);
-	          return obj;
-	        case "MultiPolygon":
-	          obj.coordinates = multiPoly(obj.coordinates);
-	          return obj;
-	        case "GeometryCollection":
-	          obj.geometries = obj.geometries.map(geometry);
-	          return obj;
-	        default :
-	          return {};
-	      }
-	    }
+	  context.map().on('move.overlay_list', debounce(function () {
+	    // layers in-view may have changed due to map move
+	    window.requestIdleCallback(section.reRender);
+	  }, 1000));
+	  return section;
+	}
 
-	    function feature(obj) {
-	      obj.geometry = geometry(obj.geometry);
-	      return obj
-	    }
+	function uiPaneBackground(context) {
+	  var backgroundPane = uiPane('background', context).key(_t('background.key')).label(_t.html('background.title')).description(_t.html('background.description')).iconName('iD-icon-layers').sections([uiSectionBackgroundList(context), uiSectionOverlayList(context), uiSectionBackgroundDisplayOptions(context), uiSectionBackgroundOffset(context)]);
+	  return backgroundPane;
+	}
 
-	    function featureCollection(f) {
-	      f.features = f.features.map(feature);
-	      return f;
-	    }
+	function uiPaneHelp(context) {
+	  var docKeys = [['help', ['welcome', 'open_data_h', 'open_data', 'before_start_h', 'before_start', 'open_source_h', 'open_source', 'open_source_help']], ['overview', ['navigation_h', 'navigation_drag', 'navigation_zoom', 'features_h', 'features', 'nodes_ways']], ['editing', ['select_h', 'select_left_click', 'select_right_click', 'select_space', 'multiselect_h', 'multiselect', 'multiselect_shift_click', 'multiselect_lasso', 'undo_redo_h', 'undo_redo', 'save_h', 'save', 'save_validation', 'upload_h', 'upload', 'backups_h', 'backups', 'keyboard_h', 'keyboard']], ['feature_editor', ['intro', 'definitions', 'type_h', 'type', 'type_picker', 'fields_h', 'fields_all_fields', 'fields_example', 'fields_add_field', 'tags_h', 'tags_all_tags', 'tags_resources']], ['points', ['intro', 'add_point_h', 'add_point', 'add_point_finish', 'move_point_h', 'move_point', 'delete_point_h', 'delete_point', 'delete_point_command']], ['lines', ['intro', 'add_line_h', 'add_line', 'add_line_draw', 'add_line_continue', 'add_line_finish', 'modify_line_h', 'modify_line_dragnode', 'modify_line_addnode', 'connect_line_h', 'connect_line', 'connect_line_display', 'connect_line_drag', 'connect_line_tag', 'disconnect_line_h', 'disconnect_line_command', 'move_line_h', 'move_line_command', 'move_line_connected', 'delete_line_h', 'delete_line', 'delete_line_command']], ['areas', ['intro', 'point_or_area_h', 'point_or_area', 'add_area_h', 'add_area_command', 'add_area_draw', 'add_area_continue', 'add_area_finish', 'square_area_h', 'square_area_command', 'modify_area_h', 'modify_area_dragnode', 'modify_area_addnode', 'delete_area_h', 'delete_area', 'delete_area_command']], ['relations', ['intro', 'edit_relation_h', 'edit_relation', 'edit_relation_add', 'edit_relation_delete', 'maintain_relation_h', 'maintain_relation', 'relation_types_h', 'multipolygon_h', 'multipolygon', 'multipolygon_create', 'multipolygon_merge', 'turn_restriction_h', 'turn_restriction', 'turn_restriction_field', 'turn_restriction_editing', 'route_h', 'route', 'route_add', 'boundary_h', 'boundary', 'boundary_add']], ['operations', ['intro', 'intro_2', 'straighten', 'orthogonalize', 'circularize', 'move', 'rotate', 'reflect', 'continue', 'reverse', 'disconnect', 'split', 'extract', 'merge', 'delete', 'downgrade', 'copy_paste']], ['notes', ['intro', 'add_note_h', 'add_note', 'place_note', 'move_note', 'update_note_h', 'update_note', 'save_note_h', 'save_note']], ['imagery', ['intro', 'sources_h', 'choosing', 'sources', 'offsets_h', 'offset', 'offset_change']], ['streetlevel', ['intro', 'using_h', 'using', 'photos', 'viewer']], ['gps', ['intro', 'survey', 'using_h', 'using', 'tracing', 'upload']], ['qa', ['intro', 'tools_h', 'tools', 'issues_h', 'issues']]];
+	  var headings = {
+	    'help.help.open_data_h': 3,
+	    'help.help.before_start_h': 3,
+	    'help.help.open_source_h': 3,
+	    'help.overview.navigation_h': 3,
+	    'help.overview.features_h': 3,
+	    'help.editing.select_h': 3,
+	    'help.editing.multiselect_h': 3,
+	    'help.editing.undo_redo_h': 3,
+	    'help.editing.save_h': 3,
+	    'help.editing.upload_h': 3,
+	    'help.editing.backups_h': 3,
+	    'help.editing.keyboard_h': 3,
+	    'help.feature_editor.type_h': 3,
+	    'help.feature_editor.fields_h': 3,
+	    'help.feature_editor.tags_h': 3,
+	    'help.points.add_point_h': 3,
+	    'help.points.move_point_h': 3,
+	    'help.points.delete_point_h': 3,
+	    'help.lines.add_line_h': 3,
+	    'help.lines.modify_line_h': 3,
+	    'help.lines.connect_line_h': 3,
+	    'help.lines.disconnect_line_h': 3,
+	    'help.lines.move_line_h': 3,
+	    'help.lines.delete_line_h': 3,
+	    'help.areas.point_or_area_h': 3,
+	    'help.areas.add_area_h': 3,
+	    'help.areas.square_area_h': 3,
+	    'help.areas.modify_area_h': 3,
+	    'help.areas.delete_area_h': 3,
+	    'help.relations.edit_relation_h': 3,
+	    'help.relations.maintain_relation_h': 3,
+	    'help.relations.relation_types_h': 2,
+	    'help.relations.multipolygon_h': 3,
+	    'help.relations.turn_restriction_h': 3,
+	    'help.relations.route_h': 3,
+	    'help.relations.boundary_h': 3,
+	    'help.notes.add_note_h': 3,
+	    'help.notes.update_note_h': 3,
+	    'help.notes.save_note_h': 3,
+	    'help.imagery.sources_h': 3,
+	    'help.imagery.offsets_h': 3,
+	    'help.streetlevel.using_h': 3,
+	    'help.gps.using_h': 3,
+	    'help.qa.tools_h': 3,
+	    'help.qa.issues_h': 3
+	  }; // For each section, squash all the texts into a single markdown document
+
+	  var docs = docKeys.map(function (key) {
+	    var helpkey = 'help.' + key[0];
+	    var helpPaneReplacements = {
+	      version: context.version
+	    };
+	    var text = key[1].reduce(function (all, part) {
+	      var subkey = helpkey + '.' + part;
+	      var depth = headings[subkey]; // is this subkey a heading?
+
+	      var hhh = depth ? Array(depth + 1).join('#') + ' ' : ''; // if so, prepend with some ##'s
+
+	      return all + hhh + helpHtml(subkey, helpPaneReplacements) + '\n\n';
+	    }, '');
+	    return {
+	      title: _t.html(helpkey + '.title'),
+	      content: marked_1(text.trim()) // use keyboard key styling for shortcuts
+	      .replace(/<code>/g, '<kbd>').replace(/<\/code>/g, '<\/kbd>')
+	    };
+	  });
+	  var helpPane = uiPane('help', context).key(_t('help.key')).label(_t.html('help.title')).description(_t.html('help.title')).iconName('iD-icon-help');
+
+	  helpPane.renderContent = function (content) {
+	    function clickHelp(d, i) {
+	      var rtl = _mainLocalizer.textDirection() === 'rtl';
+	      content.property('scrollTop', 0);
+	      helpPane.selection().select('.pane-heading h2').html(d.title);
+	      body.html(d.content);
+	      body.selectAll('a').attr('target', '_blank');
+	      menuItems.classed('selected', function (m) {
+	        return m.title === d.title;
+	      });
+	      nav.html('');
 
-	    function geometryCollection(g) {
-	      g.geometries = g.geometries.map(geometry);
-	      return g;
+	      if (rtl) {
+	        nav.call(drawNext).call(drawPrevious);
+	      } else {
+	        nav.call(drawPrevious).call(drawNext);
+	      }
+
+	      function drawNext(selection) {
+	        if (i < docs.length - 1) {
+	          var nextLink = selection.append('a').attr('href', '#').attr('class', 'next').on('click', function (d3_event) {
+	            d3_event.preventDefault();
+	            clickHelp(docs[i + 1], i + 1);
+	          });
+	          nextLink.append('span').html(docs[i + 1].title).call(svgIcon(rtl ? '#iD-icon-backward' : '#iD-icon-forward', 'inline'));
+	        }
+	      }
+
+	      function drawPrevious(selection) {
+	        if (i > 0) {
+	          var prevLink = selection.append('a').attr('href', '#').attr('class', 'previous').on('click', function (d3_event) {
+	            d3_event.preventDefault();
+	            clickHelp(docs[i - 1], i - 1);
+	          });
+	          prevLink.call(svgIcon(rtl ? '#iD-icon-forward' : '#iD-icon-backward', 'inline')).append('span').html(docs[i - 1].title);
+	        }
+	      }
 	    }
 
-	    if (!t) {
-	      return t;
+	    function clickWalkthrough(d3_event) {
+	      d3_event.preventDefault();
+	      if (context.inIntro()) return;
+	      context.container().call(uiIntro(context));
+	      context.ui().togglePanes();
 	    }
 
-	    switch (t.type) {
-	      case "Feature":
-	        return feature(t);
-	      case "GeometryCollection" :
-	        return geometryCollection(t);
-	      case "FeatureCollection" :
-	        return featureCollection(t);
-	      case "Point":
-	      case "LineString":
-	      case "Polygon":
-	      case "MultiPoint":
-	      case "MultiPolygon":
-	      case "MultiLineString":
-	        return geometry(t);
-	      default :
-	        return t;
+	    function clickShortcuts(d3_event) {
+	      d3_event.preventDefault();
+	      context.container().call(context.ui().shortcuts, true);
 	    }
-	      
-	  }
 
-	  module.exports = parse;
-	  module.exports.parse = parse;
+	    var toc = content.append('ul').attr('class', 'toc');
+	    var menuItems = toc.selectAll('li').data(docs).enter().append('li').append('a').attr('href', '#').html(function (d) {
+	      return d.title;
+	    }).on('click', function (d3_event, d) {
+	      d3_event.preventDefault();
+	      clickHelp(d, docs.indexOf(d));
+	    });
+	    var shortcuts = toc.append('li').attr('class', 'shortcuts').call(uiTooltip().title(_t.html('shortcuts.tooltip')).keys(['?']).placement('top')).append('a').attr('href', '#').on('click', clickShortcuts);
+	    shortcuts.append('div').html(_t.html('shortcuts.title'));
+	    var walkthrough = toc.append('li').attr('class', 'walkthrough').append('a').attr('href', '#').on('click', clickWalkthrough);
+	    walkthrough.append('svg').attr('class', 'logo logo-walkthrough').append('use').attr('xlink:href', '#iD-logo-walkthrough');
+	    walkthrough.append('div').html(_t.html('splash.walkthrough'));
+	    var helpContent = content.append('div').attr('class', 'left-content');
+	    var body = helpContent.append('div').attr('class', 'body');
+	    var nav = helpContent.append('div').attr('class', 'nav');
+	    clickHelp(docs[0], 0);
+	  };
 
-	}());
-	});
+	  return helpPane;
+	}
 
-	/* Polyfill service v3.13.0
-	 * For detailed credits and licence information see http://github.com/financial-times/polyfill-service
-	 *
-	 * - Array.prototype.fill, License: CC0 */
+	function uiSectionValidationIssues(id, severity, context) {
+	  var _issues = [];
+	  var section = uiSection(id, context).label(function () {
+	    if (!_issues) return '';
+	    var issueCountText = _issues.length > 1000 ? '1000+' : String(_issues.length);
+	    return _t('inspector.title_count', {
+	      title: _t.html('issues.' + severity + 's.list_title'),
+	      count: issueCountText
+	    });
+	  }).disclosureContent(renderDisclosureContent).shouldDisplay(function () {
+	    return _issues && _issues.length;
+	  });
 
-	if (!('fill' in Array.prototype)) {
-	  Object.defineProperty(Array.prototype, 'fill', {
-	    configurable: true,
-	    value: function fill (value) {
-	      if (this === undefined || this === null) {
-	        throw new TypeError(this + ' is not an object')
-	      }
+	  function getOptions() {
+	    return {
+	      what: corePreferences('validate-what') || 'edited',
+	      where: corePreferences('validate-where') || 'all'
+	    };
+	  } // get and cache the issues to display, unordered
 
-	      var arrayLike = Object(this);
 
-	      var length = Math.max(Math.min(arrayLike.length, 9007199254740991), 0) || 0;
+	  function reloadIssues() {
+	    _issues = context.validator().getIssuesBySeverity(getOptions())[severity];
+	  }
 
-	      var relativeStart = 1 in arguments ? parseInt(Number(arguments[1]), 10) || 0 : 0;
+	  function renderDisclosureContent(selection) {
+	    var center = context.map().center();
+	    var graph = context.graph(); // sort issues by distance away from the center of the map
 
-	      relativeStart = relativeStart < 0 ? Math.max(length + relativeStart, 0) : Math.min(relativeStart, length);
+	    var issues = _issues.map(function withDistance(issue) {
+	      var extent = issue.extent(graph);
+	      var dist = extent ? geoSphericalDistance(center, extent.center()) : 0;
+	      return Object.assign(issue, {
+	        dist: dist
+	      });
+	    }).sort(function byDistance(a, b) {
+	      return a.dist - b.dist;
+	    }); // cut off at 1000
 
-	      var relativeEnd = 2 in arguments && arguments[2] !== undefined ? parseInt(Number(arguments[2]), 10) || 0 : length;
 
-	      relativeEnd = relativeEnd < 0 ? Math.max(length + arguments[2], 0) : Math.min(relativeEnd, length);
+	    issues = issues.slice(0, 1000); //renderIgnoredIssuesReset(_warningsSelection);
 
-	      while (relativeStart < relativeEnd) {
-	        arrayLike[relativeStart] = value;
+	    selection.call(drawIssuesList, issues);
+	  }
 
-	        ++relativeStart;
-	      }
+	  function drawIssuesList(selection, issues) {
+	    var list = selection.selectAll('.issues-list').data([0]);
+	    list = list.enter().append('ul').attr('class', 'layer-list issues-list ' + severity + 's-list').merge(list);
+	    var items = list.selectAll('li').data(issues, function (d) {
+	      return d.key;
+	    }); // Exit
 
-	      return arrayLike
-	    },
-	    writable: true
-	  });
-	}
+	    items.exit().remove(); // Enter
 
-	/**
-	 * Polyfill for IE support
-	 */
-	Number.isFinite = Number.isFinite || function (value) {
-	  return typeof value === 'number' && isFinite(value)
-	};
+	    var itemsEnter = items.enter().append('li').attr('class', function (d) {
+	      return 'issue severity-' + d.severity;
+	    });
+	    var labelsEnter = itemsEnter.append('button').attr('class', 'issue-label').on('click', function (d3_event, d) {
+	      context.validator().focusIssue(d);
+	    }).on('mouseover', function (d3_event, d) {
+	      utilHighlightEntities(d.entityIds, true, context);
+	    }).on('mouseout', function (d3_event, d) {
+	      utilHighlightEntities(d.entityIds, false, context);
+	    });
+	    var textEnter = labelsEnter.append('span').attr('class', 'issue-text');
+	    textEnter.append('span').attr('class', 'issue-icon').each(function (d) {
+	      var iconName = '#iD-icon-' + (d.severity === 'warning' ? 'alert' : 'error');
+	      select(this).call(svgIcon(iconName));
+	    });
+	    textEnter.append('span').attr('class', 'issue-message');
+	    /*
+	    labelsEnter
+	        .append('span')
+	        .attr('class', 'issue-autofix')
+	        .each(function(d) {
+	            if (!d.autoFix) return;
+	             d3_select(this)
+	                .append('button')
+	                .attr('title', t('issues.fix_one.title'))
+	                .datum(d.autoFix)  // set button datum to the autofix
+	                .attr('class', 'autofix action')
+	                .on('click', function(d3_event, d) {
+	                    d3_event.preventDefault();
+	                    d3_event.stopPropagation();
+	                     var issuesEntityIDs = d.issue.entityIds;
+	                    utilHighlightEntities(issuesEntityIDs.concat(d.entityIds), false, context);
+	                     context.perform.apply(context, d.autoArgs);
+	                    context.validator().validate();
+	                })
+	                .call(svgIcon('#iD-icon-wrench'));
+	        });
+	    */
+	    // Update
 
-	Number.isInteger = Number.isInteger || function (val) {
-	  return typeof val === 'number' &&
-	  isFinite(val) &&
-	  Math.floor(val) === val
-	};
+	    items = items.merge(itemsEnter).order();
+	    items.selectAll('.issue-message').html(function (d) {
+	      return d.message(context);
+	    });
+	    /*
+	    // autofix
+	    var canAutoFix = issues.filter(function(issue) { return issue.autoFix; });
+	     var autoFixAll = selection.selectAll('.autofix-all')
+	        .data(canAutoFix.length ? [0] : []);
+	     // exit
+	    autoFixAll.exit()
+	        .remove();
+	     // enter
+	    var autoFixAllEnter = autoFixAll.enter()
+	        .insert('div', '.issues-list')
+	        .attr('class', 'autofix-all');
+	     var linkEnter = autoFixAllEnter
+	        .append('a')
+	        .attr('class', 'autofix-all-link')
+	        .attr('href', '#');
+	     linkEnter
+	        .append('span')
+	        .attr('class', 'autofix-all-link-text')
+	        .html(t.html('issues.fix_all.title'));
+	     linkEnter
+	        .append('span')
+	        .attr('class', 'autofix-all-link-icon')
+	        .call(svgIcon('#iD-icon-wrench'));
+	     if (severity === 'warning') {
+	        renderIgnoredIssuesReset(selection);
+	    }
+	     // update
+	    autoFixAll = autoFixAll
+	        .merge(autoFixAllEnter);
+	     autoFixAll.selectAll('.autofix-all-link')
+	        .on('click', function() {
+	            context.pauseChangeDispatch();
+	            context.perform(actionNoop());
+	            canAutoFix.forEach(function(issue) {
+	                var args = issue.autoFix.autoArgs.slice();  // copy
+	                if (typeof args[args.length - 1] !== 'function') {
+	                    args.pop();
+	                }
+	                args.push(t('issues.fix_all.annotation'));
+	                context.replace.apply(context, args);
+	            });
+	            context.resumeChangeDispatch();
+	            context.validator().validate();
+	        });
+	    */
+	  }
 
-	Number.parseFloat = Number.parseFloat || parseFloat;
+	  context.validator().on('validated.uiSectionValidationIssues' + id, function () {
+	    window.requestIdleCallback(function () {
+	      reloadIssues();
+	      section.reRender();
+	    });
+	  });
+	  context.map().on('move.uiSectionValidationIssues' + id, debounce(function () {
+	    window.requestIdleCallback(function () {
+	      if (getOptions().where === 'visible') {
+	        // must refetch issues if they are viewport-dependent
+	        reloadIssues();
+	      } // always reload list to re-sort-by-distance
 
-	Number.isNaN = Number.isNaN || function (value) {
-	  return value !== value // eslint-disable-line
-	};
 
-	/**
-	 * Polyfill for IE support
-	 */
-	Math.trunc = Math.trunc || function (x) {
-	  return x < 0 ? Math.ceil(x) : Math.floor(x)
-	};
+	      section.reRender();
+	    });
+	  }, 1000));
+	  return section;
+	}
 
-	var NumberUtil = function NumberUtil () {};
+	function uiSectionValidationOptions(context) {
+	  var section = uiSection('issues-options', context).content(renderContent);
+
+	  function renderContent(selection) {
+	    var container = selection.selectAll('.issues-options-container').data([0]);
+	    container = container.enter().append('div').attr('class', 'issues-options-container').merge(container);
+	    var data = [{
+	      key: 'what',
+	      values: ['edited', 'all']
+	    }, {
+	      key: 'where',
+	      values: ['visible', 'all']
+	    }];
+	    var options = container.selectAll('.issues-option').data(data, function (d) {
+	      return d.key;
+	    });
+	    var optionsEnter = options.enter().append('div').attr('class', function (d) {
+	      return 'issues-option issues-option-' + d.key;
+	    });
+	    optionsEnter.append('div').attr('class', 'issues-option-title').html(function (d) {
+	      return _t.html('issues.options.' + d.key + '.title');
+	    });
+	    var valuesEnter = optionsEnter.selectAll('label').data(function (d) {
+	      return d.values.map(function (val) {
+	        return {
+	          value: val,
+	          key: d.key
+	        };
+	      });
+	    }).enter().append('label');
+	    valuesEnter.append('input').attr('type', 'radio').attr('name', function (d) {
+	      return 'issues-option-' + d.key;
+	    }).attr('value', function (d) {
+	      return d.value;
+	    }).property('checked', function (d) {
+	      return getOptions()[d.key] === d.value;
+	    }).on('change', function (d3_event, d) {
+	      updateOptionValue(d3_event, d.key, d.value);
+	    });
+	    valuesEnter.append('span').html(function (d) {
+	      return _t.html('issues.options.' + d.key + '.' + d.value);
+	    });
+	  }
 
-	NumberUtil.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	NumberUtil.prototype.getClass = function getClass () {
-	  return NumberUtil
-	};
-	NumberUtil.prototype.equalsWithTolerance = function equalsWithTolerance (x1, x2, tolerance) {
-	  return Math.abs(x1 - x2) <= tolerance
-	};
+	  function getOptions() {
+	    return {
+	      what: corePreferences('validate-what') || 'edited',
+	      // 'all', 'edited'
+	      where: corePreferences('validate-where') || 'all' // 'all', 'visible'
 
-	var IllegalArgumentException = (function (Error) {
-		function IllegalArgumentException (message) {
-			Error.call(this, message);
-			this.name = 'IllegalArgumentException';
-			this.message = message;
-			this.stack = (new Error()).stack;
-		}
-
-		if ( Error ) { IllegalArgumentException.__proto__ = Error; }
-		IllegalArgumentException.prototype = Object.create( Error && Error.prototype );
-		IllegalArgumentException.prototype.constructor = IllegalArgumentException;
-
-		return IllegalArgumentException;
-	}(Error));
-
-	var Double = function Double () {};
-
-	var staticAccessors$1 = { MAX_VALUE: { configurable: true } };
-
-	Double.isNaN = function isNaN (n) { return Number.isNaN(n) };
-	Double.doubleToLongBits = function doubleToLongBits (n) { return n };
-	Double.longBitsToDouble = function longBitsToDouble (n) { return n };
-	Double.isInfinite = function isInfinite (n) { return !Number.isFinite(n) };
-	staticAccessors$1.MAX_VALUE.get = function () { return Number.MAX_VALUE };
-
-	Object.defineProperties( Double, staticAccessors$1 );
-
-	var Comparable = function Comparable () {};
-
-	var Clonable = function Clonable () {};
-
-	var Comparator = function Comparator () {};
-
-	function Serializable () {}
-
-	// import Assert from '../util/Assert'
-
-	var Coordinate = function Coordinate () {
-	  this.x = null;
-	  this.y = null;
-	  this.z = null;
-	  if (arguments.length === 0) {
-	    this.x = 0.0;
-	    this.y = 0.0;
-	    this.z = Coordinate.NULL_ORDINATE;
-	  } else if (arguments.length === 1) {
-	    var c = arguments[0];
-	    this.x = c.x;
-	    this.y = c.y;
-	    this.z = c.z;
-	  } else if (arguments.length === 2) {
-	    this.x = arguments[0];
-	    this.y = arguments[1];
-	    this.z = Coordinate.NULL_ORDINATE;
-	  } else if (arguments.length === 3) {
-	    this.x = arguments[0];
-	    this.y = arguments[1];
-	    this.z = arguments[2];
+	    };
 	  }
-	};
 
-	var staticAccessors = { DimensionalComparator: { configurable: true },serialVersionUID: { configurable: true },NULL_ORDINATE: { configurable: true },X: { configurable: true },Y: { configurable: true },Z: { configurable: true } };
-	Coordinate.prototype.setOrdinate = function setOrdinate (ordinateIndex, value) {
-	  switch (ordinateIndex) {
-	    case Coordinate.X:
-	      this.x = value;
-	      break
-	    case Coordinate.Y:
-	      this.y = value;
-	      break
-	    case Coordinate.Z:
-	      this.z = value;
-	      break
-	    default:
-	      throw new IllegalArgumentException('Invalid ordinate index: ' + ordinateIndex)
-	  }
-	};
-	Coordinate.prototype.equals2D = function equals2D () {
-	  if (arguments.length === 1) {
-	    var other = arguments[0];
-	    if (this.x !== other.x) {
-	      return false
-	    }
-	    if (this.y !== other.y) {
-	      return false
+	  function updateOptionValue(d3_event, d, val) {
+	    if (!val && d3_event && d3_event.target) {
+	      val = d3_event.target.value;
 	    }
-	    return true
-	  } else if (arguments.length === 2) {
-	    var c = arguments[0];
-	    var tolerance = arguments[1];
-	    if (!NumberUtil.equalsWithTolerance(this.x, c.x, tolerance)) {
-	      return false
-	    }
-	    if (!NumberUtil.equalsWithTolerance(this.y, c.y, tolerance)) {
-	      return false
-	    }
-	    return true
-	  }
-	};
-	Coordinate.prototype.getOrdinate = function getOrdinate (ordinateIndex) {
-	  switch (ordinateIndex) {
-	    case Coordinate.X:
-	      return this.x
-	    case Coordinate.Y:
-	      return this.y
-	    case Coordinate.Z:
-	      return this.z
-	  }
-	  throw new IllegalArgumentException('Invalid ordinate index: ' + ordinateIndex)
-	};
-	Coordinate.prototype.equals3D = function equals3D (other) {
-	  return this.x === other.x &&
-	         this.y === other.y &&
-	         ((this.z === other.z || Double.isNaN(this.z)) &&
-	         Double.isNaN(other.z))
-	};
-	Coordinate.prototype.equals = function equals (other) {
-	  if (!(other instanceof Coordinate)) {
-	    return false
-	  }
-	  return this.equals2D(other)
-	};
-	Coordinate.prototype.equalInZ = function equalInZ (c, tolerance) {
-	  return NumberUtil.equalsWithTolerance(this.z, c.z, tolerance)
-	};
-	Coordinate.prototype.compareTo = function compareTo (o) {
-	  var other = o;
-	  if (this.x < other.x) { return -1 }
-	  if (this.x > other.x) { return 1 }
-	  if (this.y < other.y) { return -1 }
-	  if (this.y > other.y) { return 1 }
-	  return 0
-	};
-	Coordinate.prototype.clone = function clone () {
-	  // try {
-	  // var coord = null
-	  // return coord
-	  // } catch (e) {
-	  // if (e instanceof CloneNotSupportedException) {
-	  //   Assert.shouldNeverReachHere("this shouldn't happen because this class is Cloneable")
-	  //   return null
-	  // } else throw e
-	  // } finally {}
-	};
-	Coordinate.prototype.copy = function copy () {
-	  return new Coordinate(this)
-	};
-	Coordinate.prototype.toString = function toString () {
-	  return '(' + this.x + ', ' + this.y + ', ' + this.z + ')'
-	};
-	Coordinate.prototype.distance3D = function distance3D (c) {
-	  var dx = this.x - c.x;
-	  var dy = this.y - c.y;
-	  var dz = this.z - c.z;
-	  return Math.sqrt(dx * dx + dy * dy + dz * dz)
-	};
-	Coordinate.prototype.distance = function distance (c) {
-	  var dx = this.x - c.x;
-	  var dy = this.y - c.y;
-	  return Math.sqrt(dx * dx + dy * dy)
-	};
-	Coordinate.prototype.hashCode = function hashCode () {
-	  var result = 17;
-	  result = 37 * result + Coordinate.hashCode(this.x);
-	  result = 37 * result + Coordinate.hashCode(this.y);
-	  return result
-	};
-	Coordinate.prototype.setCoordinate = function setCoordinate (other) {
-	  this.x = other.x;
-	  this.y = other.y;
-	  this.z = other.z;
-	};
-	Coordinate.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable, Clonable, Serializable]
-	};
-	Coordinate.prototype.getClass = function getClass () {
-	  return Coordinate
-	};
-	Coordinate.hashCode = function hashCode () {
-	  if (arguments.length === 1) {
-	    var x = arguments[0];
-	    var f = Double.doubleToLongBits(x);
-	    return Math.trunc((f ^ f) >>> 32)
-	  }
-	};
-	staticAccessors.DimensionalComparator.get = function () { return DimensionalComparator };
-	staticAccessors.serialVersionUID.get = function () { return 6683108902428366910 };
-	staticAccessors.NULL_ORDINATE.get = function () { return Double.NaN };
-	staticAccessors.X.get = function () { return 0 };
-	staticAccessors.Y.get = function () { return 1 };
-	staticAccessors.Z.get = function () { return 2 };
-
-	Object.defineProperties( Coordinate, staticAccessors );
-
-	var DimensionalComparator = function DimensionalComparator (dimensionsToTest) {
-	  this._dimensionsToTest = 2;
-	  if (arguments.length === 0) ; else if (arguments.length === 1) {
-	    var dimensionsToTest$1 = arguments[0];
-	    if (dimensionsToTest$1 !== 2 && dimensionsToTest$1 !== 3) { throw new IllegalArgumentException('only 2 or 3 dimensions may be specified') }
-	    this._dimensionsToTest = dimensionsToTest$1;
-	  }
-	};
-	DimensionalComparator.prototype.compare = function compare (o1, o2) {
-	  var c1 = o1;
-	  var c2 = o2;
-	  var compX = DimensionalComparator.compare(c1.x, c2.x);
-	  if (compX !== 0) { return compX }
-	  var compY = DimensionalComparator.compare(c1.y, c2.y);
-	  if (compY !== 0) { return compY }
-	  if (this._dimensionsToTest <= 2) { return 0 }
-	  var compZ = DimensionalComparator.compare(c1.z, c2.z);
-	  return compZ
-	};
-	DimensionalComparator.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparator]
-	};
-	DimensionalComparator.prototype.getClass = function getClass () {
-	  return DimensionalComparator
-	};
-	DimensionalComparator.compare = function compare (a, b) {
-	  if (a < b) { return -1 }
-	  if (a > b) { return 1 }
-	  if (Double.isNaN(a)) {
-	    if (Double.isNaN(b)) { return 0 }
-	    return -1
-	  }
-	  if (Double.isNaN(b)) { return 1 }
-	  return 0
-	};
 
-	// import hasInterface from '../../../../hasInterface'
-	// import CoordinateSequence from './CoordinateSequence'
+	    corePreferences('validate-' + d, val);
+	    context.validator().validate();
+	  }
 
-	var CoordinateSequenceFactory = function CoordinateSequenceFactory () {};
+	  return section;
+	}
 
-	CoordinateSequenceFactory.prototype.create = function create () {
-	  // if (arguments.length === 1) {
-	  // if (arguments[0] instanceof Array) {
-	  //   let coordinates = arguments[0]
-	  // } else if (hasInterface(arguments[0], CoordinateSequence)) {
-	  //   let coordSeq = arguments[0]
-	  // }
-	  // } else if (arguments.length === 2) {
-	  // let size = arguments[0]
-	  // let dimension = arguments[1]
-	  // }
-	};
-	CoordinateSequenceFactory.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CoordinateSequenceFactory.prototype.getClass = function getClass () {
-	  return CoordinateSequenceFactory
-	};
+	function uiSectionValidationRules(context) {
+	  var MINSQUARE = 0;
+	  var MAXSQUARE = 20;
+	  var DEFAULTSQUARE = 5; // see also unsquare_way.js
 
-	var Location = function Location () {};
+	  var section = uiSection('issues-rules', context).disclosureContent(renderDisclosureContent).label(_t.html('issues.rules.title'));
 
-	var staticAccessors$4 = { INTERIOR: { configurable: true },BOUNDARY: { configurable: true },EXTERIOR: { configurable: true },NONE: { configurable: true } };
+	  var _ruleKeys = context.validator().getRuleKeys().filter(function (key) {
+	    return key !== 'maprules';
+	  }).sort(function (key1, key2) {
+	    // alphabetize by localized title
+	    return _t('issues.' + key1 + '.title') < _t('issues.' + key2 + '.title') ? -1 : 1;
+	  });
 
-	Location.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Location.prototype.getClass = function getClass () {
-	  return Location
-	};
-	Location.toLocationSymbol = function toLocationSymbol (locationValue) {
-	  switch (locationValue) {
-	    case Location.EXTERIOR:
-	      return 'e'
-	    case Location.BOUNDARY:
-	      return 'b'
-	    case Location.INTERIOR:
-	      return 'i'
-	    case Location.NONE:
-	      return '-'
-	  }
-	  throw new IllegalArgumentException('Unknown location value: ' + locationValue)
-	};
-	staticAccessors$4.INTERIOR.get = function () { return 0 };
-	staticAccessors$4.BOUNDARY.get = function () { return 1 };
-	staticAccessors$4.EXTERIOR.get = function () { return 2 };
-	staticAccessors$4.NONE.get = function () { return -1 };
+	  function renderDisclosureContent(selection) {
+	    var container = selection.selectAll('.issues-rulelist-container').data([0]);
+	    var containerEnter = container.enter().append('div').attr('class', 'issues-rulelist-container');
+	    containerEnter.append('ul').attr('class', 'layer-list issue-rules-list');
+	    var ruleLinks = containerEnter.append('div').attr('class', 'issue-rules-links section-footer');
+	    ruleLinks.append('a').attr('class', 'issue-rules-link').attr('href', '#').html(_t.html('issues.disable_all')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.validator().disableRules(_ruleKeys);
+	    });
+	    ruleLinks.append('a').attr('class', 'issue-rules-link').attr('href', '#').html(_t.html('issues.enable_all')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.validator().disableRules([]);
+	    }); // Update
 
-	Object.defineProperties( Location, staticAccessors$4 );
+	    container = container.merge(containerEnter);
+	    container.selectAll('.issue-rules-list').call(drawListItems, _ruleKeys, 'checkbox', 'rule', toggleRule, isRuleEnabled);
+	  }
 
-	var hasInterface = function (o, i) {
-	  return o.interfaces_ && o.interfaces_().indexOf(i) > -1
-	};
+	  function drawListItems(selection, data, type, name, change, active) {
+	    var items = selection.selectAll('li').data(data); // Exit
 
-	var MathUtil = function MathUtil () {};
+	    items.exit().remove(); // Enter
 
-	var staticAccessors$5 = { LOG_10: { configurable: true } };
+	    var enter = items.enter().append('li');
 
-	MathUtil.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MathUtil.prototype.getClass = function getClass () {
-	  return MathUtil
-	};
-	MathUtil.log10 = function log10 (x) {
-	  var ln = Math.log(x);
-	  if (Double.isInfinite(ln)) { return ln }
-	  if (Double.isNaN(ln)) { return ln }
-	  return ln / MathUtil.LOG_10
-	};
-	MathUtil.min = function min (v1, v2, v3, v4) {
-	  var min = v1;
-	  if (v2 < min) { min = v2; }
-	  if (v3 < min) { min = v3; }
-	  if (v4 < min) { min = v4; }
-	  return min
-	};
-	MathUtil.clamp = function clamp () {
-	  if (typeof arguments[2] === 'number' && (typeof arguments[0] === 'number' && typeof arguments[1] === 'number')) {
-	    var x = arguments[0];
-	    var min = arguments[1];
-	    var max = arguments[2];
-	    if (x < min) { return min }
-	    if (x > max) { return max }
-	    return x
-	  } else if (Number.isInteger(arguments[2]) && (Number.isInteger(arguments[0]) && Number.isInteger(arguments[1]))) {
-	    var x$1 = arguments[0];
-	    var min$1 = arguments[1];
-	    var max$1 = arguments[2];
-	    if (x$1 < min$1) { return min$1 }
-	    if (x$1 > max$1) { return max$1 }
-	    return x$1
-	  }
-	};
-	MathUtil.wrap = function wrap (index, max) {
-	  if (index < 0) {
-	    return max - -index % max
-	  }
-	  return index % max
-	};
-	MathUtil.max = function max () {
-	  if (arguments.length === 3) {
-	    var v1 = arguments[0];
-	    var v2 = arguments[1];
-	    var v3 = arguments[2];
-	    var max = v1;
-	    if (v2 > max) { max = v2; }
-	    if (v3 > max) { max = v3; }
-	    return max
-	  } else if (arguments.length === 4) {
-	    var v1$1 = arguments[0];
-	    var v2$1 = arguments[1];
-	    var v3$1 = arguments[2];
-	    var v4 = arguments[3];
-	    var max$1 = v1$1;
-	    if (v2$1 > max$1) { max$1 = v2$1; }
-	    if (v3$1 > max$1) { max$1 = v3$1; }
-	    if (v4 > max$1) { max$1 = v4; }
-	    return max$1
-	  }
-	};
-	MathUtil.average = function average (x1, x2) {
-	  return (x1 + x2) / 2.0
-	};
-	staticAccessors$5.LOG_10.get = function () { return Math.log(10) };
+	    if (name === 'rule') {
+	      enter.call(uiTooltip().title(function (d) {
+	        return _t.html('issues.' + d + '.tip');
+	      }).placement('top'));
+	    }
 
-	Object.defineProperties( MathUtil, staticAccessors$5 );
+	    var label = enter.append('label');
+	    label.append('input').attr('type', type).attr('name', name).on('change', change);
+	    label.append('span').html(function (d) {
+	      var params = {};
 
-	var StringBuffer = function StringBuffer (str) {
-	  this.str = str;
-	};
-	StringBuffer.prototype.append = function append (e) {
-	  this.str += e;
-	};
+	      if (d === 'unsquare_way') {
+	        params.val = '<span class="square-degrees"></span>';
+	      }
 
-	StringBuffer.prototype.setCharAt = function setCharAt (i, c) {
-	  this.str = this.str.substr(0, i) + c + this.str.substr(i + 1);
-	};
+	      return _t.html('issues.' + d + '.title', params);
+	    }); // Update
 
-	StringBuffer.prototype.toString = function toString (e) {
-	  return this.str
-	};
+	    items = items.merge(enter);
+	    items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', false); // user-configurable square threshold
 
-	var Integer = function Integer (value) {
-	  this.value = value;
-	};
-	Integer.prototype.intValue = function intValue () {
-	  return this.value
-	};
-	Integer.prototype.compareTo = function compareTo (o) {
-	  if (this.value < o) { return -1 }
-	  if (this.value > o) { return 1 }
-	  return 0
-	};
-	Integer.isNaN = function isNaN (n) { return Number.isNaN(n) };
-
-	var Character = function Character () {};
-
-	Character.isWhitespace = function isWhitespace (c) { return ((c <= 32 && c >= 0) || c === 127) };
-	Character.toUpperCase = function toUpperCase (c) { return c.toUpperCase() };
-
-	var DD = function DD () {
-	  this._hi = 0.0;
-	  this._lo = 0.0;
-	  if (arguments.length === 0) {
-	    this.init(0.0);
-	  } else if (arguments.length === 1) {
-	    if (typeof arguments[0] === 'number') {
-	      var x = arguments[0];
-	      this.init(x);
-	    } else if (arguments[0] instanceof DD) {
-	      var dd = arguments[0];
-	      this.init(dd);
-	    } else if (typeof arguments[0] === 'string') {
-	      var str = arguments[0];
-	      DD.call(this, DD.parse(str));
-	    }
-	  } else if (arguments.length === 2) {
-	    var hi = arguments[0];
-	    var lo = arguments[1];
-	    this.init(hi, lo);
-	  }
-	};
+	    var degStr = corePreferences('validate-square-degrees');
 
-	var staticAccessors$7 = { PI: { configurable: true },TWO_PI: { configurable: true },PI_2: { configurable: true },E: { configurable: true },NaN: { configurable: true },EPS: { configurable: true },SPLIT: { configurable: true },MAX_PRINT_DIGITS: { configurable: true },TEN: { configurable: true },ONE: { configurable: true },SCI_NOT_EXPONENT_CHAR: { configurable: true },SCI_NOT_ZERO: { configurable: true } };
-	DD.prototype.le = function le (y) {
-	  return (this._hi < y._hi || this._hi === y._hi) && this._lo <= y._lo
-	};
-	DD.prototype.extractSignificantDigits = function extractSignificantDigits (insertDecimalPoint, magnitude) {
-	  var y = this.abs();
-	  var mag = DD.magnitude(y._hi);
-	  var scale = DD.TEN.pow(mag);
-	  y = y.divide(scale);
-	  if (y.gt(DD.TEN)) {
-	    y = y.divide(DD.TEN);
-	    mag += 1;
-	  } else if (y.lt(DD.ONE)) {
-	    y = y.multiply(DD.TEN);
-	    mag -= 1;
-	  }
-	  var decimalPointPos = mag + 1;
-	  var buf = new StringBuffer();
-	  var numDigits = DD.MAX_PRINT_DIGITS - 1;
-	  for (var i = 0; i <= numDigits; i++) {
-	    if (insertDecimalPoint && i === decimalPointPos) {
-	      buf.append('.');
-	    }
-	    var digit = Math.trunc(y._hi);
-	    if (digit < 0) {
-	      break
-	    }
-	    var rebiasBy10 = false;
-	    var digitChar = 0;
-	    if (digit > 9) {
-	      rebiasBy10 = true;
-	      digitChar = '9';
-	    } else {
-	      digitChar = '0' + digit;
-	    }
-	    buf.append(digitChar);
-	    y = y.subtract(DD.valueOf(digit)).multiply(DD.TEN);
-	    if (rebiasBy10) { y.selfAdd(DD.TEN); }
-	    var continueExtractingDigits = true;
-	    var remMag = DD.magnitude(y._hi);
-	    if (remMag < 0 && Math.abs(remMag) >= numDigits - i) { continueExtractingDigits = false; }
-	    if (!continueExtractingDigits) { break }
-	  }
-	  magnitude[0] = mag;
-	  return buf.toString()
-	};
-	DD.prototype.sqr = function sqr () {
-	  return this.multiply(this)
-	};
-	DD.prototype.doubleValue = function doubleValue () {
-	  return this._hi + this._lo
-	};
-	DD.prototype.subtract = function subtract () {
-	  if (arguments[0] instanceof DD) {
-	    var y = arguments[0];
-	    return this.add(y.negate())
-	  } else if (typeof arguments[0] === 'number') {
-	    var y$1 = arguments[0];
-	    return this.add(-y$1)
-	  }
-	};
-	DD.prototype.equals = function equals () {
-	  if (arguments.length === 1) {
-	    var y = arguments[0];
-	    return this._hi === y._hi && this._lo === y._lo
-	  }
-	};
-	DD.prototype.isZero = function isZero () {
-	  return this._hi === 0.0 && this._lo === 0.0
-	};
-	DD.prototype.selfSubtract = function selfSubtract () {
-	  if (arguments[0] instanceof DD) {
-	    var y = arguments[0];
-	    if (this.isNaN()) { return this }
-	    return this.selfAdd(-y._hi, -y._lo)
-	  } else if (typeof arguments[0] === 'number') {
-	    var y$1 = arguments[0];
-	    if (this.isNaN()) { return this }
-	    return this.selfAdd(-y$1, 0.0)
-	  }
-	};
-	DD.prototype.getSpecialNumberString = function getSpecialNumberString () {
-	  if (this.isZero()) { return '0.0' }
-	  if (this.isNaN()) { return 'NaN ' }
-	  return null
-	};
-	DD.prototype.min = function min (x) {
-	  if (this.le(x)) {
-	    return this
-	  } else {
-	    return x
-	  }
-	};
-	DD.prototype.selfDivide = function selfDivide () {
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof DD) {
-	      var y = arguments[0];
-	      return this.selfDivide(y._hi, y._lo)
-	    } else if (typeof arguments[0] === 'number') {
-	      var y$1 = arguments[0];
-	      return this.selfDivide(y$1, 0.0)
-	    }
-	  } else if (arguments.length === 2) {
-	    var yhi = arguments[0];
-	    var ylo = arguments[1];
-	    var hc = null;
-	    var tc = null;
-	    var hy = null;
-	    var ty = null;
-	    var C = null;
-	    var c = null;
-	    var U = null;
-	    var u = null;
-	    C = this._hi / yhi;
-	    c = DD.SPLIT * C;
-	    hc = c - C;
-	    u = DD.SPLIT * yhi;
-	    hc = c - hc;
-	    tc = C - hc;
-	    hy = u - yhi;
-	    U = C * yhi;
-	    hy = u - hy;
-	    ty = yhi - hy;
-	    u = hc * hy - U + hc * ty + tc * hy + tc * ty;
-	    c = (this._hi - U - u + this._lo - C * ylo) / yhi;
-	    u = C + c;
-	    this._hi = u;
-	    this._lo = C - u + c;
-	    return this
-	  }
-	};
-	DD.prototype.dump = function dump () {
-	  return 'DD<' + this._hi + ', ' + this._lo + '>'
-	};
-	DD.prototype.divide = function divide () {
-	  if (arguments[0] instanceof DD) {
-	    var y = arguments[0];
-	    var hc = null;
-	    var tc = null;
-	    var hy = null;
-	    var ty = null;
-	    var C = null;
-	    var c = null;
-	    var U = null;
-	    var u = null;
-	    C = this._hi / y._hi;
-	    c = DD.SPLIT * C;
-	    hc = c - C;
-	    u = DD.SPLIT * y._hi;
-	    hc = c - hc;
-	    tc = C - hc;
-	    hy = u - y._hi;
-	    U = C * y._hi;
-	    hy = u - hy;
-	    ty = y._hi - hy;
-	    u = hc * hy - U + hc * ty + tc * hy + tc * ty;
-	    c = (this._hi - U - u + this._lo - C * y._lo) / y._hi;
-	    u = C + c;
-	    var zhi = u;
-	    var zlo = C - u + c;
-	    return new DD(zhi, zlo)
-	  } else if (typeof arguments[0] === 'number') {
-	    var y$1 = arguments[0];
-	    if (Double.isNaN(y$1)) { return DD.createNaN() }
-	    return DD.copy(this).selfDivide(y$1, 0.0)
-	  }
-	};
-	DD.prototype.ge = function ge (y) {
-	  return (this._hi > y._hi || this._hi === y._hi) && this._lo >= y._lo
-	};
-	DD.prototype.pow = function pow (exp) {
-	  if (exp === 0.0) { return DD.valueOf(1.0) }
-	  var r = new DD(this);
-	  var s = DD.valueOf(1.0);
-	  var n = Math.abs(exp);
-	  if (n > 1) {
-	    while (n > 0) {
-	      if (n % 2 === 1) {
-	        s.selfMultiply(r);
-	      }
-	      n /= 2;
-	      if (n > 0) { r = r.sqr(); }
+	    if (degStr === null) {
+	      degStr = DEFAULTSQUARE.toString();
 	    }
-	  } else {
-	    s = r;
-	  }
-	  if (exp < 0) { return s.reciprocal() }
-	  return s
-	};
-	DD.prototype.ceil = function ceil () {
-	  if (this.isNaN()) { return DD.NaN }
-	  var fhi = Math.ceil(this._hi);
-	  var flo = 0.0;
-	  if (fhi === this._hi) {
-	    flo = Math.ceil(this._lo);
-	  }
-	  return new DD(fhi, flo)
-	};
-	DD.prototype.compareTo = function compareTo (o) {
-	  var other = o;
-	  if (this._hi < other._hi) { return -1 }
-	  if (this._hi > other._hi) { return 1 }
-	  if (this._lo < other._lo) { return -1 }
-	  if (this._lo > other._lo) { return 1 }
-	  return 0
-	};
-	DD.prototype.rint = function rint () {
-	  if (this.isNaN()) { return this }
-	  var plus5 = this.add(0.5);
-	  return plus5.floor()
-	};
-	DD.prototype.setValue = function setValue () {
-	  if (arguments[0] instanceof DD) {
-	    var value = arguments[0];
-	    this.init(value);
-	    return this
-	  } else if (typeof arguments[0] === 'number') {
-	    var value$1 = arguments[0];
-	    this.init(value$1);
-	    return this
-	  }
-	};
-	DD.prototype.max = function max (x) {
-	  if (this.ge(x)) {
-	    return this
-	  } else {
-	    return x
-	  }
-	};
-	DD.prototype.sqrt = function sqrt () {
-	  if (this.isZero()) { return DD.valueOf(0.0) }
-	  if (this.isNegative()) {
-	    return DD.NaN
-	  }
-	  var x = 1.0 / Math.sqrt(this._hi);
-	  var ax = this._hi * x;
-	  var axdd = DD.valueOf(ax);
-	  var diffSq = this.subtract(axdd.sqr());
-	  var d2 = diffSq._hi * (x * 0.5);
-	  return axdd.add(d2)
-	};
-	DD.prototype.selfAdd = function selfAdd () {
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof DD) {
-	      var y = arguments[0];
-	      return this.selfAdd(y._hi, y._lo)
-	    } else if (typeof arguments[0] === 'number') {
-	      var y$1 = arguments[0];
-	      var H = null;
-	      var h = null;
-	      var S = null;
-	      var s = null;
-	      var e = null;
-	      var f = null;
-	      S = this._hi + y$1;
-	      e = S - this._hi;
-	      s = S - e;
-	      s = y$1 - e + (this._hi - s);
-	      f = s + this._lo;
-	      H = S + f;
-	      h = f + (S - H);
-	      this._hi = H + h;
-	      this._lo = h + (H - this._hi);
-	      return this
-	    }
-	  } else if (arguments.length === 2) {
-	    var yhi = arguments[0];
-	    var ylo = arguments[1];
-	    var H$1 = null;
-	    var h$1 = null;
-	    var T = null;
-	    var t = null;
-	    var S$1 = null;
-	    var s$1 = null;
-	    var e$1 = null;
-	    var f$1 = null;
-	    S$1 = this._hi + yhi;
-	    T = this._lo + ylo;
-	    e$1 = S$1 - this._hi;
-	    f$1 = T - this._lo;
-	    s$1 = S$1 - e$1;
-	    t = T - f$1;
-	    s$1 = yhi - e$1 + (this._hi - s$1);
-	    t = ylo - f$1 + (this._lo - t);
-	    e$1 = s$1 + T;
-	    H$1 = S$1 + e$1;
-	    h$1 = e$1 + (S$1 - H$1);
-	    e$1 = t + h$1;
-	    var zhi = H$1 + e$1;
-	    var zlo = e$1 + (H$1 - zhi);
-	    this._hi = zhi;
-	    this._lo = zlo;
-	    return this
-	  }
-	};
-	DD.prototype.selfMultiply = function selfMultiply () {
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof DD) {
-	      var y = arguments[0];
-	      return this.selfMultiply(y._hi, y._lo)
-	    } else if (typeof arguments[0] === 'number') {
-	      var y$1 = arguments[0];
-	      return this.selfMultiply(y$1, 0.0)
-	    }
-	  } else if (arguments.length === 2) {
-	    var yhi = arguments[0];
-	    var ylo = arguments[1];
-	    var hx = null;
-	    var tx = null;
-	    var hy = null;
-	    var ty = null;
-	    var C = null;
-	    var c = null;
-	    C = DD.SPLIT * this._hi;
-	    hx = C - this._hi;
-	    c = DD.SPLIT * yhi;
-	    hx = C - hx;
-	    tx = this._hi - hx;
-	    hy = c - yhi;
-	    C = this._hi * yhi;
-	    hy = c - hy;
-	    ty = yhi - hy;
-	    c = hx * hy - C + hx * ty + tx * hy + tx * ty + (this._hi * ylo + this._lo * yhi);
-	    var zhi = C + c;
-	    hx = C - zhi;
-	    var zlo = c + hx;
-	    this._hi = zhi;
-	    this._lo = zlo;
-	    return this
-	  }
-	};
-	DD.prototype.selfSqr = function selfSqr () {
-	  return this.selfMultiply(this)
-	};
-	DD.prototype.floor = function floor () {
-	  if (this.isNaN()) { return DD.NaN }
-	  var fhi = Math.floor(this._hi);
-	  var flo = 0.0;
-	  if (fhi === this._hi) {
-	    flo = Math.floor(this._lo);
-	  }
-	  return new DD(fhi, flo)
-	};
-	DD.prototype.negate = function negate () {
-	  if (this.isNaN()) { return this }
-	  return new DD(-this._hi, -this._lo)
-	};
-	DD.prototype.clone = function clone () {
-	  // try {
-	  // return null
-	  // } catch (ex) {
-	  // if (ex instanceof CloneNotSupportedException) {
-	  //   return null
-	  // } else throw ex
-	  // } finally {}
-	};
-	DD.prototype.multiply = function multiply () {
-	  if (arguments[0] instanceof DD) {
-	    var y = arguments[0];
-	    if (y.isNaN()) { return DD.createNaN() }
-	    return DD.copy(this).selfMultiply(y)
-	  } else if (typeof arguments[0] === 'number') {
-	    var y$1 = arguments[0];
-	    if (Double.isNaN(y$1)) { return DD.createNaN() }
-	    return DD.copy(this).selfMultiply(y$1, 0.0)
-	  }
-	};
-	DD.prototype.isNaN = function isNaN () {
-	  return Double.isNaN(this._hi)
-	};
-	DD.prototype.intValue = function intValue () {
-	  return Math.trunc(this._hi)
-	};
-	DD.prototype.toString = function toString () {
-	  var mag = DD.magnitude(this._hi);
-	  if (mag >= -3 && mag <= 20) { return this.toStandardNotation() }
-	  return this.toSciNotation()
-	};
-	DD.prototype.toStandardNotation = function toStandardNotation () {
-	  var specialStr = this.getSpecialNumberString();
-	  if (specialStr !== null) { return specialStr }
-	  var magnitude = new Array(1).fill(null);
-	  var sigDigits = this.extractSignificantDigits(true, magnitude);
-	  var decimalPointPos = magnitude[0] + 1;
-	  var num = sigDigits;
-	  if (sigDigits.charAt(0) === '.') {
-	    num = '0' + sigDigits;
-	  } else if (decimalPointPos < 0) {
-	    num = '0.' + DD.stringOfChar('0', -decimalPointPos) + sigDigits;
-	  } else if (sigDigits.indexOf('.') === -1) {
-	    var numZeroes = decimalPointPos - sigDigits.length;
-	    var zeroes = DD.stringOfChar('0', numZeroes);
-	    num = sigDigits + zeroes + '.0';
-	  }
-	  if (this.isNegative()) { return '-' + num }
-	  return num
-	};
-	DD.prototype.reciprocal = function reciprocal () {
-	  var hc = null;
-	  var tc = null;
-	  var hy = null;
-	  var ty = null;
-	  var C = null;
-	  var c = null;
-	  var U = null;
-	  var u = null;
-	  C = 1.0 / this._hi;
-	  c = DD.SPLIT * C;
-	  hc = c - C;
-	  u = DD.SPLIT * this._hi;
-	  hc = c - hc;
-	  tc = C - hc;
-	  hy = u - this._hi;
-	  U = C * this._hi;
-	  hy = u - hy;
-	  ty = this._hi - hy;
-	  u = hc * hy - U + hc * ty + tc * hy + tc * ty;
-	  c = (1.0 - U - u - C * this._lo) / this._hi;
-	  var zhi = C + c;
-	  var zlo = C - zhi + c;
-	  return new DD(zhi, zlo)
-	};
-	DD.prototype.toSciNotation = function toSciNotation () {
-	  if (this.isZero()) { return DD.SCI_NOT_ZERO }
-	  var specialStr = this.getSpecialNumberString();
-	  if (specialStr !== null) { return specialStr }
-	  var magnitude = new Array(1).fill(null);
-	  var digits = this.extractSignificantDigits(false, magnitude);
-	  var expStr = DD.SCI_NOT_EXPONENT_CHAR + magnitude[0];
-	  if (digits.charAt(0) === '0') {
-	    throw new Error('Found leading zero: ' + digits)
-	  }
-	  var trailingDigits = '';
-	  if (digits.length > 1) { trailingDigits = digits.substring(1); }
-	  var digitsWithDecimal = digits.charAt(0) + '.' + trailingDigits;
-	  if (this.isNegative()) { return '-' + digitsWithDecimal + expStr }
-	  return digitsWithDecimal + expStr
-	};
-	DD.prototype.abs = function abs () {
-	  if (this.isNaN()) { return DD.NaN }
-	  if (this.isNegative()) { return this.negate() }
-	  return new DD(this)
-	};
-	DD.prototype.isPositive = function isPositive () {
-	  return (this._hi > 0.0 || this._hi === 0.0) && this._lo > 0.0
-	};
-	DD.prototype.lt = function lt (y) {
-	  return (this._hi < y._hi || this._hi === y._hi) && this._lo < y._lo
-	};
-	DD.prototype.add = function add () {
-	  if (arguments[0] instanceof DD) {
-	    var y = arguments[0];
-	    return DD.copy(this).selfAdd(y)
-	  } else if (typeof arguments[0] === 'number') {
-	    var y$1 = arguments[0];
-	    return DD.copy(this).selfAdd(y$1)
-	  }
-	};
-	DD.prototype.init = function init () {
-	  if (arguments.length === 1) {
-	    if (typeof arguments[0] === 'number') {
-	      var x = arguments[0];
-	      this._hi = x;
-	      this._lo = 0.0;
-	    } else if (arguments[0] instanceof DD) {
-	      var dd = arguments[0];
-	      this._hi = dd._hi;
-	      this._lo = dd._lo;
-	    }
-	  } else if (arguments.length === 2) {
-	    var hi = arguments[0];
-	    var lo = arguments[1];
-	    this._hi = hi;
-	    this._lo = lo;
-	  }
-	};
-	DD.prototype.gt = function gt (y) {
-	  return (this._hi > y._hi || this._hi === y._hi) && this._lo > y._lo
-	};
-	DD.prototype.isNegative = function isNegative () {
-	  return (this._hi < 0.0 || this._hi === 0.0) && this._lo < 0.0
-	};
-	DD.prototype.trunc = function trunc () {
-	  if (this.isNaN()) { return DD.NaN }
-	  if (this.isPositive()) { return this.floor(); } else { return this.ceil() }
-	};
-	DD.prototype.signum = function signum () {
-	  if (this._hi > 0) { return 1 }
-	  if (this._hi < 0) { return -1 }
-	  if (this._lo > 0) { return 1 }
-	  if (this._lo < 0) { return -1 }
-	  return 0
-	};
-	DD.prototype.interfaces_ = function interfaces_ () {
-	  return [Serializable, Comparable, Clonable]
-	};
-	DD.prototype.getClass = function getClass () {
-	  return DD
-	};
-	DD.sqr = function sqr (x) {
-	  return DD.valueOf(x).selfMultiply(x)
-	};
-	DD.valueOf = function valueOf () {
-	  if (typeof arguments[0] === 'string') {
-	    var str = arguments[0];
-	    return DD.parse(str)
-	  } else if (typeof arguments[0] === 'number') {
-	    var x = arguments[0];
-	    return new DD(x)
+
+	    var span = items.selectAll('.square-degrees');
+	    var input = span.selectAll('.square-degrees-input').data([0]); // enter / update
+
+	    input.enter().append('input').attr('type', 'number').attr('min', MINSQUARE.toString()).attr('max', MAXSQUARE.toString()).attr('step', '0.5').attr('class', 'square-degrees-input').call(utilNoAuto).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation();
+	      this.select();
+	    }).on('keyup', function (d3_event) {
+	      if (d3_event.keyCode === 13) {
+	        // ↩ Return
+	        this.blur();
+	        this.select();
+	      }
+	    }).on('blur', changeSquare).merge(input).property('value', degStr);
 	  }
-	};
-	DD.sqrt = function sqrt (x) {
-	  return DD.valueOf(x).sqrt()
-	};
-	DD.parse = function parse (str) {
-	  var i = 0;
-	  var strlen = str.length;
-	  while (Character.isWhitespace(str.charAt(i))) { i++; }
-	  var isNegative = false;
-	  if (i < strlen) {
-	    var signCh = str.charAt(i);
-	    if (signCh === '-' || signCh === '+') {
-	      i++;
-	      if (signCh === '-') { isNegative = true; }
+
+	  function changeSquare() {
+	    var input = select(this);
+	    var degStr = utilGetSetValue(input).trim();
+	    var degNum = parseFloat(degStr, 10);
+
+	    if (!isFinite(degNum)) {
+	      degNum = DEFAULTSQUARE;
+	    } else if (degNum > MAXSQUARE) {
+	      degNum = MAXSQUARE;
+	    } else if (degNum < MINSQUARE) {
+	      degNum = MINSQUARE;
 	    }
+
+	    degNum = Math.round(degNum * 10) / 10; // round to 1 decimal
+
+	    degStr = degNum.toString();
+	    input.property('value', degStr);
+	    corePreferences('validate-square-degrees', degStr);
+	    context.validator().revalidateUnsquare();
 	  }
-	  var val = new DD();
-	  var numDigits = 0;
-	  var numBeforeDec = 0;
-	  var exp = 0;
-	  while (true) {
-	    if (i >= strlen) { break }
-	    var ch = str.charAt(i);
-	    i++;
-	    if (Character.isDigit(ch)) {
-	      var d = ch - '0';
-	      val.selfMultiply(DD.TEN);
-	      val.selfAdd(d);
-	      numDigits++;
-	      continue
-	    }
-	    if (ch === '.') {
-	      numBeforeDec = numDigits;
-	      continue
-	    }
-	    if (ch === 'e' || ch === 'E') {
-	      var expStr = str.substring(i);
-	      try {
-	        exp = Integer.parseInt(expStr);
-	      } catch (ex) {
-	        if (ex instanceof Error) {
-	          throw new Error('Invalid exponent ' + expStr + ' in string ' + str)
-	        } else { throw ex }
-	      } finally {}
-	      break
-	    }
-	    throw new Error("Unexpected character '" + ch + "' at position " + i + ' in string ' + str)
-	  }
-	  var val2 = val;
-	  var numDecPlaces = numDigits - numBeforeDec - exp;
-	  if (numDecPlaces === 0) {
-	    val2 = val;
-	  } else if (numDecPlaces > 0) {
-	    var scale = DD.TEN.pow(numDecPlaces);
-	    val2 = val.divide(scale);
-	  } else if (numDecPlaces < 0) {
-	    var scale$1 = DD.TEN.pow(-numDecPlaces);
-	    val2 = val.multiply(scale$1);
-	  }
-	  if (isNegative) {
-	    return val2.negate()
-	  }
-	  return val2
-	};
-	DD.createNaN = function createNaN () {
-	  return new DD(Double.NaN, Double.NaN)
-	};
-	DD.copy = function copy (dd) {
-	  return new DD(dd)
-	};
-	DD.magnitude = function magnitude (x) {
-	  var xAbs = Math.abs(x);
-	  var xLog10 = Math.log(xAbs) / Math.log(10);
-	  var xMag = Math.trunc(Math.floor(xLog10));
-	  var xApprox = Math.pow(10, xMag);
-	  if (xApprox * 10 <= xAbs) { xMag += 1; }
-	  return xMag
-	};
-	DD.stringOfChar = function stringOfChar (ch, len) {
-	  var buf = new StringBuffer();
-	  for (var i = 0; i < len; i++) {
-	    buf.append(ch);
-	  }
-	  return buf.toString()
-	};
-	staticAccessors$7.PI.get = function () { return new DD(3.141592653589793116e+00, 1.224646799147353207e-16) };
-	staticAccessors$7.TWO_PI.get = function () { return new DD(6.283185307179586232e+00, 2.449293598294706414e-16) };
-	staticAccessors$7.PI_2.get = function () { return new DD(1.570796326794896558e+00, 6.123233995736766036e-17) };
-	staticAccessors$7.E.get = function () { return new DD(2.718281828459045091e+00, 1.445646891729250158e-16) };
-	staticAccessors$7.NaN.get = function () { return new DD(Double.NaN, Double.NaN) };
-	staticAccessors$7.EPS.get = function () { return 1.23259516440783e-32 };
-	staticAccessors$7.SPLIT.get = function () { return 134217729.0 };
-	staticAccessors$7.MAX_PRINT_DIGITS.get = function () { return 32 };
-	staticAccessors$7.TEN.get = function () { return DD.valueOf(10.0) };
-	staticAccessors$7.ONE.get = function () { return DD.valueOf(1.0) };
-	staticAccessors$7.SCI_NOT_EXPONENT_CHAR.get = function () { return 'E' };
-	staticAccessors$7.SCI_NOT_ZERO.get = function () { return '0.0E0' };
-
-	Object.defineProperties( DD, staticAccessors$7 );
-
-	var CGAlgorithmsDD = function CGAlgorithmsDD () {};
-
-	var staticAccessors$6 = { DP_SAFE_EPSILON: { configurable: true } };
-
-	CGAlgorithmsDD.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CGAlgorithmsDD.prototype.getClass = function getClass () {
-	  return CGAlgorithmsDD
-	};
-	CGAlgorithmsDD.orientationIndex = function orientationIndex (p1, p2, q) {
-	  var index = CGAlgorithmsDD.orientationIndexFilter(p1, p2, q);
-	  if (index <= 1) { return index }
-	  var dx1 = DD.valueOf(p2.x).selfAdd(-p1.x);
-	  var dy1 = DD.valueOf(p2.y).selfAdd(-p1.y);
-	  var dx2 = DD.valueOf(q.x).selfAdd(-p2.x);
-	  var dy2 = DD.valueOf(q.y).selfAdd(-p2.y);
-	  return dx1.selfMultiply(dy2).selfSubtract(dy1.selfMultiply(dx2)).signum()
-	};
-	CGAlgorithmsDD.signOfDet2x2 = function signOfDet2x2 (x1, y1, x2, y2) {
-	  var det = x1.multiply(y2).selfSubtract(y1.multiply(x2));
-	  return det.signum()
-	};
-	CGAlgorithmsDD.intersection = function intersection (p1, p2, q1, q2) {
-	  var denom1 = DD.valueOf(q2.y).selfSubtract(q1.y).selfMultiply(DD.valueOf(p2.x).selfSubtract(p1.x));
-	  var denom2 = DD.valueOf(q2.x).selfSubtract(q1.x).selfMultiply(DD.valueOf(p2.y).selfSubtract(p1.y));
-	  var denom = denom1.subtract(denom2);
-	  var numx1 = DD.valueOf(q2.x).selfSubtract(q1.x).selfMultiply(DD.valueOf(p1.y).selfSubtract(q1.y));
-	  var numx2 = DD.valueOf(q2.y).selfSubtract(q1.y).selfMultiply(DD.valueOf(p1.x).selfSubtract(q1.x));
-	  var numx = numx1.subtract(numx2);
-	  var fracP = numx.selfDivide(denom).doubleValue();
-	  var x = DD.valueOf(p1.x).selfAdd(DD.valueOf(p2.x).selfSubtract(p1.x).selfMultiply(fracP)).doubleValue();
-	  var numy1 = DD.valueOf(p2.x).selfSubtract(p1.x).selfMultiply(DD.valueOf(p1.y).selfSubtract(q1.y));
-	  var numy2 = DD.valueOf(p2.y).selfSubtract(p1.y).selfMultiply(DD.valueOf(p1.x).selfSubtract(q1.x));
-	  var numy = numy1.subtract(numy2);
-	  var fracQ = numy.selfDivide(denom).doubleValue();
-	  var y = DD.valueOf(q1.y).selfAdd(DD.valueOf(q2.y).selfSubtract(q1.y).selfMultiply(fracQ)).doubleValue();
-	  return new Coordinate(x, y)
-	};
-	CGAlgorithmsDD.orientationIndexFilter = function orientationIndexFilter (pa, pb, pc) {
-	  var detsum = null;
-	  var detleft = (pa.x - pc.x) * (pb.y - pc.y);
-	  var detright = (pa.y - pc.y) * (pb.x - pc.x);
-	  var det = detleft - detright;
-	  if (detleft > 0.0) {
-	    if (detright <= 0.0) {
-	      return CGAlgorithmsDD.signum(det)
-	    } else {
-	      detsum = detleft + detright;
-	    }
-	  } else if (detleft < 0.0) {
-	    if (detright >= 0.0) {
-	      return CGAlgorithmsDD.signum(det)
-	    } else {
-	      detsum = -detleft - detright;
-	    }
-	  } else {
-	    return CGAlgorithmsDD.signum(det)
+
+	  function isRuleEnabled(d) {
+	    return context.validator().isRuleEnabled(d);
 	  }
-	  var errbound = CGAlgorithmsDD.DP_SAFE_EPSILON * detsum;
-	  if (det >= errbound || -det >= errbound) {
-	    return CGAlgorithmsDD.signum(det)
+
+	  function toggleRule(d3_event, d) {
+	    context.validator().toggleRule(d);
 	  }
-	  return 2
-	};
-	CGAlgorithmsDD.signum = function signum (x) {
-	  if (x > 0) { return 1 }
-	  if (x < 0) { return -1 }
-	  return 0
-	};
-	staticAccessors$6.DP_SAFE_EPSILON.get = function () { return 1e-15 };
-
-	Object.defineProperties( CGAlgorithmsDD, staticAccessors$6 );
-
-	var CoordinateSequence = function CoordinateSequence () {};
-
-	var staticAccessors$8 = { X: { configurable: true },Y: { configurable: true },Z: { configurable: true },M: { configurable: true } };
-
-	staticAccessors$8.X.get = function () { return 0 };
-	staticAccessors$8.Y.get = function () { return 1 };
-	staticAccessors$8.Z.get = function () { return 2 };
-	staticAccessors$8.M.get = function () { return 3 };
-	CoordinateSequence.prototype.setOrdinate = function setOrdinate (index, ordinateIndex, value) {};
-	CoordinateSequence.prototype.size = function size () {};
-	CoordinateSequence.prototype.getOrdinate = function getOrdinate (index, ordinateIndex) {};
-	CoordinateSequence.prototype.getCoordinate = function getCoordinate () {};
-	CoordinateSequence.prototype.getCoordinateCopy = function getCoordinateCopy (i) {};
-	CoordinateSequence.prototype.getDimension = function getDimension () {};
-	CoordinateSequence.prototype.getX = function getX (index) {};
-	CoordinateSequence.prototype.clone = function clone () {};
-	CoordinateSequence.prototype.expandEnvelope = function expandEnvelope (env) {};
-	CoordinateSequence.prototype.copy = function copy () {};
-	CoordinateSequence.prototype.getY = function getY (index) {};
-	CoordinateSequence.prototype.toCoordinateArray = function toCoordinateArray () {};
-	CoordinateSequence.prototype.interfaces_ = function interfaces_ () {
-	  return [Clonable]
-	};
-	CoordinateSequence.prototype.getClass = function getClass () {
-	  return CoordinateSequence
-	};
 
-	Object.defineProperties( CoordinateSequence, staticAccessors$8 );
+	  context.validator().on('validated.uiSectionValidationRules', function () {
+	    window.requestIdleCallback(section.reRender);
+	  });
+	  return section;
+	}
 
-	var Exception = function Exception () {};
+	function uiSectionValidationStatus(context) {
+	  var section = uiSection('issues-status', context).content(renderContent).shouldDisplay(function () {
+	    var issues = context.validator().getIssues(getOptions());
+	    return issues.length === 0;
+	  });
 
-	var NotRepresentableException = (function (Exception$$1) {
-	  function NotRepresentableException () {
-	    Exception$$1.call(this, 'Projective point not representable on the Cartesian plane.');
+	  function getOptions() {
+	    return {
+	      what: corePreferences('validate-what') || 'edited',
+	      where: corePreferences('validate-where') || 'all'
+	    };
 	  }
 
-	  if ( Exception$$1 ) { NotRepresentableException.__proto__ = Exception$$1; }
-	  NotRepresentableException.prototype = Object.create( Exception$$1 && Exception$$1.prototype );
-	  NotRepresentableException.prototype.constructor = NotRepresentableException;
-	  NotRepresentableException.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  NotRepresentableException.prototype.getClass = function getClass () {
-	    return NotRepresentableException
-	  };
+	  function renderContent(selection) {
+	    var box = selection.selectAll('.box').data([0]);
+	    var boxEnter = box.enter().append('div').attr('class', 'box');
+	    boxEnter.append('div').call(svgIcon('#iD-icon-apply', 'pre-text'));
+	    var noIssuesMessage = boxEnter.append('span');
+	    noIssuesMessage.append('strong').attr('class', 'message');
+	    noIssuesMessage.append('br');
+	    noIssuesMessage.append('span').attr('class', 'details');
+	    renderIgnoredIssuesReset(selection);
+	    setNoIssuesText(selection);
+	  }
+
+	  function renderIgnoredIssuesReset(selection) {
+	    var ignoredIssues = context.validator().getIssues({
+	      what: 'all',
+	      where: 'all',
+	      includeDisabledRules: true,
+	      includeIgnored: 'only'
+	    });
+	    var resetIgnored = selection.selectAll('.reset-ignored').data(ignoredIssues.length ? [0] : []); // exit
 
-	  return NotRepresentableException;
-	}(Exception));
+	    resetIgnored.exit().remove(); // enter
 
-	var System = function System () {};
+	    var resetIgnoredEnter = resetIgnored.enter().append('div').attr('class', 'reset-ignored section-footer');
+	    resetIgnoredEnter.append('a').attr('href', '#'); // update
 
-	System.arraycopy = function arraycopy (src, srcPos, dest, destPos, len) {
-	  var c = 0;
-	  for (var i = srcPos; i < srcPos + len; i++) {
-	    dest[destPos + c] = src[i];
-	    c++;
+	    resetIgnored = resetIgnored.merge(resetIgnoredEnter);
+	    resetIgnored.select('a').html(_t('inspector.title_count', {
+	      title: _t.html('issues.reset_ignored'),
+	      count: ignoredIssues.length
+	    }));
+	    resetIgnored.on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.validator().resetIgnoredIssues();
+	    });
 	  }
-	};
 
-	System.getProperty = function getProperty (name) {
-	  return {
-	    'line.separator': '\n'
-	  }[name]
-	};
+	  function setNoIssuesText(selection) {
+	    var opts = getOptions();
 
-	var HCoordinate = function HCoordinate () {
-	  this.x = null;
-	  this.y = null;
-	  this.w = null;
-	  if (arguments.length === 0) {
-	    this.x = 0.0;
-	    this.y = 0.0;
-	    this.w = 1.0;
-	  } else if (arguments.length === 1) {
-	    var p = arguments[0];
-	    this.x = p.x;
-	    this.y = p.y;
-	    this.w = 1.0;
-	  } else if (arguments.length === 2) {
-	    if (typeof arguments[0] === 'number' && typeof arguments[1] === 'number') {
-	      var _x = arguments[0];
-	      var _y = arguments[1];
-	      this.x = _x;
-	      this.y = _y;
-	      this.w = 1.0;
-	    } else if (arguments[0] instanceof HCoordinate && arguments[1] instanceof HCoordinate) {
-	      var p1 = arguments[0];
-	      var p2 = arguments[1];
-	      this.x = p1.y * p2.w - p2.y * p1.w;
-	      this.y = p2.x * p1.w - p1.x * p2.w;
-	      this.w = p1.x * p2.y - p2.x * p1.y;
-	    } else if (arguments[0] instanceof Coordinate && arguments[1] instanceof Coordinate) {
-	      var p1$1 = arguments[0];
-	      var p2$1 = arguments[1];
-	      this.x = p1$1.y - p2$1.y;
-	      this.y = p2$1.x - p1$1.x;
-	      this.w = p1$1.x * p2$1.y - p2$1.x * p1$1.y;
-	    }
-	  } else if (arguments.length === 3) {
-	    var _x$1 = arguments[0];
-	    var _y$1 = arguments[1];
-	    var _w = arguments[2];
-	    this.x = _x$1;
-	    this.y = _y$1;
-	    this.w = _w;
-	  } else if (arguments.length === 4) {
-	    var p1$2 = arguments[0];
-	    var p2$2 = arguments[1];
-	    var q1 = arguments[2];
-	    var q2 = arguments[3];
-	    var px = p1$2.y - p2$2.y;
-	    var py = p2$2.x - p1$2.x;
-	    var pw = p1$2.x * p2$2.y - p2$2.x * p1$2.y;
-	    var qx = q1.y - q2.y;
-	    var qy = q2.x - q1.x;
-	    var qw = q1.x * q2.y - q2.x * q1.y;
-	    this.x = py * qw - qy * pw;
-	    this.y = qx * pw - px * qw;
-	    this.w = px * qy - qx * py;
-	  }
-	};
-	HCoordinate.prototype.getY = function getY () {
-	  var a = this.y / this.w;
-	  if (Double.isNaN(a) || Double.isInfinite(a)) {
-	    throw new NotRepresentableException()
-	  }
-	  return a
-	};
-	HCoordinate.prototype.getX = function getX () {
-	  var a = this.x / this.w;
-	  if (Double.isNaN(a) || Double.isInfinite(a)) {
-	    throw new NotRepresentableException()
-	  }
-	  return a
-	};
-	HCoordinate.prototype.getCoordinate = function getCoordinate () {
-	  var p = new Coordinate();
-	  p.x = this.getX();
-	  p.y = this.getY();
-	  return p
-	};
-	HCoordinate.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	HCoordinate.prototype.getClass = function getClass () {
-	  return HCoordinate
-	};
-	HCoordinate.intersection = function intersection (p1, p2, q1, q2) {
-	  var px = p1.y - p2.y;
-	  var py = p2.x - p1.x;
-	  var pw = p1.x * p2.y - p2.x * p1.y;
-	  var qx = q1.y - q2.y;
-	  var qy = q2.x - q1.x;
-	  var qw = q1.x * q2.y - q2.x * q1.y;
-	  var x = py * qw - qy * pw;
-	  var y = qx * pw - px * qw;
-	  var w = px * qy - qx * py;
-	  var xInt = x / w;
-	  var yInt = y / w;
-	  if (Double.isNaN(xInt) || (Double.isInfinite(xInt) || Double.isNaN(yInt)) || Double.isInfinite(yInt)) {
-	    throw new NotRepresentableException()
-	  }
-	  return new Coordinate(xInt, yInt)
-	};
+	    function checkForHiddenIssues(cases) {
+	      for (var type in cases) {
+	        var hiddenOpts = cases[type];
+	        var hiddenIssues = context.validator().getIssues(hiddenOpts);
 
-	var Envelope = function Envelope () {
-	  this._minx = null;
-	  this._maxx = null;
-	  this._miny = null;
-	  this._maxy = null;
-	  if (arguments.length === 0) {
-	    this.init();
-	  } else if (arguments.length === 1) {
-	    if (arguments[0] instanceof Coordinate) {
-	      var p = arguments[0];
-	      this.init(p.x, p.x, p.y, p.y);
-	    } else if (arguments[0] instanceof Envelope) {
-	      var env = arguments[0];
-	      this.init(env);
-	    }
-	  } else if (arguments.length === 2) {
-	    var p1 = arguments[0];
-	    var p2 = arguments[1];
-	    this.init(p1.x, p2.x, p1.y, p2.y);
-	  } else if (arguments.length === 4) {
-	    var x1 = arguments[0];
-	    var x2 = arguments[1];
-	    var y1 = arguments[2];
-	    var y2 = arguments[3];
-	    this.init(x1, x2, y1, y2);
-	  }
-	};
+	        if (hiddenIssues.length) {
+	          selection.select('.box .details').html(_t.html('issues.no_issues.hidden_issues.' + type, {
+	            count: hiddenIssues.length.toString()
+	          }));
+	          return;
+	        }
+	      }
 
-	var staticAccessors$9 = { serialVersionUID: { configurable: true } };
-	Envelope.prototype.getArea = function getArea () {
-	  return this.getWidth() * this.getHeight()
-	};
-	Envelope.prototype.equals = function equals (other) {
-	  if (!(other instanceof Envelope)) {
-	    return false
-	  }
-	  var otherEnvelope = other;
-	  if (this.isNull()) {
-	    return otherEnvelope.isNull()
-	  }
-	  return this._maxx === otherEnvelope.getMaxX() && this._maxy === otherEnvelope.getMaxY() && this._minx === otherEnvelope.getMinX() && this._miny === otherEnvelope.getMinY()
-	};
-	Envelope.prototype.intersection = function intersection (env) {
-	  if (this.isNull() || env.isNull() || !this.intersects(env)) { return new Envelope() }
-	  var intMinX = this._minx > env._minx ? this._minx : env._minx;
-	  var intMinY = this._miny > env._miny ? this._miny : env._miny;
-	  var intMaxX = this._maxx < env._maxx ? this._maxx : env._maxx;
-	  var intMaxY = this._maxy < env._maxy ? this._maxy : env._maxy;
-	  return new Envelope(intMinX, intMaxX, intMinY, intMaxY)
-	};
-	Envelope.prototype.isNull = function isNull () {
-	  return this._maxx < this._minx
-	};
-	Envelope.prototype.getMaxX = function getMaxX () {
-	  return this._maxx
-	};
-	Envelope.prototype.covers = function covers () {
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof Coordinate) {
-	      var p = arguments[0];
-	      return this.covers(p.x, p.y)
-	    } else if (arguments[0] instanceof Envelope) {
-	      var other = arguments[0];
-	      if (this.isNull() || other.isNull()) {
-	        return false
-	      }
-	      return other.getMinX() >= this._minx && other.getMaxX() <= this._maxx && other.getMinY() >= this._miny && other.getMaxY() <= this._maxy
-	    }
-	  } else if (arguments.length === 2) {
-	    var x = arguments[0];
-	    var y = arguments[1];
-	    if (this.isNull()) { return false }
-	    return x >= this._minx && x <= this._maxx && y >= this._miny && y <= this._maxy
-	  }
-	};
-	Envelope.prototype.intersects = function intersects () {
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof Envelope) {
-	      var other = arguments[0];
-	      if (this.isNull() || other.isNull()) {
-	        return false
-	      }
-	      return !(other._minx > this._maxx || other._maxx < this._minx || other._miny > this._maxy || other._maxy < this._miny)
-	    } else if (arguments[0] instanceof Coordinate) {
-	      var p = arguments[0];
-	      return this.intersects(p.x, p.y)
-	    }
-	  } else if (arguments.length === 2) {
-	    var x = arguments[0];
-	    var y = arguments[1];
-	    if (this.isNull()) { return false }
-	    return !(x > this._maxx || x < this._minx || y > this._maxy || y < this._miny)
-	  }
-	};
-	Envelope.prototype.getMinY = function getMinY () {
-	  return this._miny
-	};
-	Envelope.prototype.getMinX = function getMinX () {
-	  return this._minx
-	};
-	Envelope.prototype.expandToInclude = function expandToInclude () {
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof Coordinate) {
-	      var p = arguments[0];
-	      this.expandToInclude(p.x, p.y);
-	    } else if (arguments[0] instanceof Envelope) {
-	      var other = arguments[0];
-	      if (other.isNull()) {
-	        return null
-	      }
-	      if (this.isNull()) {
-	        this._minx = other.getMinX();
-	        this._maxx = other.getMaxX();
-	        this._miny = other.getMinY();
-	        this._maxy = other.getMaxY();
-	      } else {
-	        if (other._minx < this._minx) {
-	          this._minx = other._minx;
+	      selection.select('.box .details').html(_t.html('issues.no_issues.hidden_issues.none'));
+	    }
+
+	    var messageType;
+
+	    if (opts.what === 'edited' && opts.where === 'visible') {
+	      messageType = 'edits_in_view';
+	      checkForHiddenIssues({
+	        elsewhere: {
+	          what: 'edited',
+	          where: 'all'
+	        },
+	        everything_else: {
+	          what: 'all',
+	          where: 'visible'
+	        },
+	        disabled_rules: {
+	          what: 'edited',
+	          where: 'visible',
+	          includeDisabledRules: 'only'
+	        },
+	        everything_else_elsewhere: {
+	          what: 'all',
+	          where: 'all'
+	        },
+	        disabled_rules_elsewhere: {
+	          what: 'edited',
+	          where: 'all',
+	          includeDisabledRules: 'only'
+	        },
+	        ignored_issues: {
+	          what: 'edited',
+	          where: 'visible',
+	          includeIgnored: 'only'
+	        },
+	        ignored_issues_elsewhere: {
+	          what: 'edited',
+	          where: 'all',
+	          includeIgnored: 'only'
 	        }
-	        if (other._maxx > this._maxx) {
-	          this._maxx = other._maxx;
+	      });
+	    } else if (opts.what === 'edited' && opts.where === 'all') {
+	      messageType = 'edits';
+	      checkForHiddenIssues({
+	        everything_else: {
+	          what: 'all',
+	          where: 'all'
+	        },
+	        disabled_rules: {
+	          what: 'edited',
+	          where: 'all',
+	          includeDisabledRules: 'only'
+	        },
+	        ignored_issues: {
+	          what: 'edited',
+	          where: 'all',
+	          includeIgnored: 'only'
 	        }
-	        if (other._miny < this._miny) {
-	          this._miny = other._miny;
+	      });
+	    } else if (opts.what === 'all' && opts.where === 'visible') {
+	      messageType = 'everything_in_view';
+	      checkForHiddenIssues({
+	        elsewhere: {
+	          what: 'all',
+	          where: 'all'
+	        },
+	        disabled_rules: {
+	          what: 'all',
+	          where: 'visible',
+	          includeDisabledRules: 'only'
+	        },
+	        disabled_rules_elsewhere: {
+	          what: 'all',
+	          where: 'all',
+	          includeDisabledRules: 'only'
+	        },
+	        ignored_issues: {
+	          what: 'all',
+	          where: 'visible',
+	          includeIgnored: 'only'
+	        },
+	        ignored_issues_elsewhere: {
+	          what: 'all',
+	          where: 'all',
+	          includeIgnored: 'only'
 	        }
-	        if (other._maxy > this._maxy) {
-	          this._maxy = other._maxy;
+	      });
+	    } else if (opts.what === 'all' && opts.where === 'all') {
+	      messageType = 'everything';
+	      checkForHiddenIssues({
+	        disabled_rules: {
+	          what: 'all',
+	          where: 'all',
+	          includeDisabledRules: 'only'
+	        },
+	        ignored_issues: {
+	          what: 'all',
+	          where: 'all',
+	          includeIgnored: 'only'
 	        }
-	      }
-	    }
-	  } else if (arguments.length === 2) {
-	    var x = arguments[0];
-	    var y = arguments[1];
-	    if (this.isNull()) {
-	      this._minx = x;
-	      this._maxx = x;
-	      this._miny = y;
-	      this._maxy = y;
-	    } else {
-	      if (x < this._minx) {
-	        this._minx = x;
-	      }
-	      if (x > this._maxx) {
-	        this._maxx = x;
-	      }
-	      if (y < this._miny) {
-	        this._miny = y;
-	      }
-	      if (y > this._maxy) {
-	        this._maxy = y;
-	      }
-	    }
-	  }
-	};
-	Envelope.prototype.minExtent = function minExtent () {
-	  if (this.isNull()) { return 0.0 }
-	  var w = this.getWidth();
-	  var h = this.getHeight();
-	  if (w < h) { return w }
-	  return h
-	};
-	Envelope.prototype.getWidth = function getWidth () {
-	  if (this.isNull()) {
-	    return 0
-	  }
-	  return this._maxx - this._minx
-	};
-	Envelope.prototype.compareTo = function compareTo (o) {
-	  var env = o;
-	  if (this.isNull()) {
-	    if (env.isNull()) { return 0 }
-	    return -1
-	  } else {
-	    if (env.isNull()) { return 1 }
-	  }
-	  if (this._minx < env._minx) { return -1 }
-	  if (this._minx > env._minx) { return 1 }
-	  if (this._miny < env._miny) { return -1 }
-	  if (this._miny > env._miny) { return 1 }
-	  if (this._maxx < env._maxx) { return -1 }
-	  if (this._maxx > env._maxx) { return 1 }
-	  if (this._maxy < env._maxy) { return -1 }
-	  if (this._maxy > env._maxy) { return 1 }
-	  return 0
-	};
-	Envelope.prototype.translate = function translate (transX, transY) {
-	  if (this.isNull()) {
-	    return null
-	  }
-	  this.init(this.getMinX() + transX, this.getMaxX() + transX, this.getMinY() + transY, this.getMaxY() + transY);
-	};
-	Envelope.prototype.toString = function toString () {
-	  return 'Env[' + this._minx + ' : ' + this._maxx + ', ' + this._miny + ' : ' + this._maxy + ']'
-	};
-	Envelope.prototype.setToNull = function setToNull () {
-	  this._minx = 0;
-	  this._maxx = -1;
-	  this._miny = 0;
-	  this._maxy = -1;
-	};
-	Envelope.prototype.getHeight = function getHeight () {
-	  if (this.isNull()) {
-	    return 0
-	  }
-	  return this._maxy - this._miny
-	};
-	Envelope.prototype.maxExtent = function maxExtent () {
-	  if (this.isNull()) { return 0.0 }
-	  var w = this.getWidth();
-	  var h = this.getHeight();
-	  if (w > h) { return w }
-	  return h
-	};
-	Envelope.prototype.expandBy = function expandBy () {
-	  if (arguments.length === 1) {
-	    var distance = arguments[0];
-	    this.expandBy(distance, distance);
-	  } else if (arguments.length === 2) {
-	    var deltaX = arguments[0];
-	    var deltaY = arguments[1];
-	    if (this.isNull()) { return null }
-	    this._minx -= deltaX;
-	    this._maxx += deltaX;
-	    this._miny -= deltaY;
-	    this._maxy += deltaY;
-	    if (this._minx > this._maxx || this._miny > this._maxy) { this.setToNull(); }
-	  }
-	};
-	Envelope.prototype.contains = function contains () {
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof Envelope) {
-	      var other = arguments[0];
-	      return this.covers(other)
-	    } else if (arguments[0] instanceof Coordinate) {
-	      var p = arguments[0];
-	      return this.covers(p)
-	    }
-	  } else if (arguments.length === 2) {
-	    var x = arguments[0];
-	    var y = arguments[1];
-	    return this.covers(x, y)
-	  }
-	};
-	Envelope.prototype.centre = function centre () {
-	  if (this.isNull()) { return null }
-	  return new Coordinate((this.getMinX() + this.getMaxX()) / 2.0, (this.getMinY() + this.getMaxY()) / 2.0)
-	};
-	Envelope.prototype.init = function init () {
-	  if (arguments.length === 0) {
-	    this.setToNull();
-	  } else if (arguments.length === 1) {
-	    if (arguments[0] instanceof Coordinate) {
-	      var p = arguments[0];
-	      this.init(p.x, p.x, p.y, p.y);
-	    } else if (arguments[0] instanceof Envelope) {
-	      var env = arguments[0];
-	      this._minx = env._minx;
-	      this._maxx = env._maxx;
-	      this._miny = env._miny;
-	      this._maxy = env._maxy;
-	    }
-	  } else if (arguments.length === 2) {
-	    var p1 = arguments[0];
-	    var p2 = arguments[1];
-	    this.init(p1.x, p2.x, p1.y, p2.y);
-	  } else if (arguments.length === 4) {
-	    var x1 = arguments[0];
-	    var x2 = arguments[1];
-	    var y1 = arguments[2];
-	    var y2 = arguments[3];
-	    if (x1 < x2) {
-	      this._minx = x1;
-	      this._maxx = x2;
-	    } else {
-	      this._minx = x2;
-	      this._maxx = x1;
-	    }
-	    if (y1 < y2) {
-	      this._miny = y1;
-	      this._maxy = y2;
-	    } else {
-	      this._miny = y2;
-	      this._maxy = y1;
+	      });
 	    }
-	  }
-	};
-	Envelope.prototype.getMaxY = function getMaxY () {
-	  return this._maxy
-	};
-	Envelope.prototype.distance = function distance (env) {
-	  if (this.intersects(env)) { return 0 }
-	  var dx = 0.0;
-	  if (this._maxx < env._minx) { dx = env._minx - this._maxx; } else if (this._minx > env._maxx) { dx = this._minx - env._maxx; }
-	  var dy = 0.0;
-	  if (this._maxy < env._miny) { dy = env._miny - this._maxy; } else if (this._miny > env._maxy) { dy = this._miny - env._maxy; }
-	  if (dx === 0.0) { return dy }
-	  if (dy === 0.0) { return dx }
-	  return Math.sqrt(dx * dx + dy * dy)
-	};
-	Envelope.prototype.hashCode = function hashCode () {
-	  var result = 17;
-	  result = 37 * result + Coordinate.hashCode(this._minx);
-	  result = 37 * result + Coordinate.hashCode(this._maxx);
-	  result = 37 * result + Coordinate.hashCode(this._miny);
-	  result = 37 * result + Coordinate.hashCode(this._maxy);
-	  return result
-	};
-	Envelope.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable, Serializable]
-	};
-	Envelope.prototype.getClass = function getClass () {
-	  return Envelope
-	};
-	Envelope.intersects = function intersects () {
-	  if (arguments.length === 3) {
-	    var p1 = arguments[0];
-	    var p2 = arguments[1];
-	    var q = arguments[2];
-	    if (q.x >= (p1.x < p2.x ? p1.x : p2.x) && q.x <= (p1.x > p2.x ? p1.x : p2.x) && (q.y >= (p1.y < p2.y ? p1.y : p2.y) && q.y <= (p1.y > p2.y ? p1.y : p2.y))) {
-	      return true
-	    }
-	    return false
-	  } else if (arguments.length === 4) {
-	    var p1$1 = arguments[0];
-	    var p2$1 = arguments[1];
-	    var q1 = arguments[2];
-	    var q2 = arguments[3];
-	    var minq = Math.min(q1.x, q2.x);
-	    var maxq = Math.max(q1.x, q2.x);
-	    var minp = Math.min(p1$1.x, p2$1.x);
-	    var maxp = Math.max(p1$1.x, p2$1.x);
-	    if (minp > maxq) { return false }
-	    if (maxp < minq) { return false }
-	    minq = Math.min(q1.y, q2.y);
-	    maxq = Math.max(q1.y, q2.y);
-	    minp = Math.min(p1$1.y, p2$1.y);
-	    maxp = Math.max(p1$1.y, p2$1.y);
-	    if (minp > maxq) { return false }
-	    if (maxp < minq) { return false }
-	    return true
-	  }
-	};
-	staticAccessors$9.serialVersionUID.get = function () { return 5873921885273102420 };
-
-	Object.defineProperties( Envelope, staticAccessors$9 );
-
-	var regExes = {
-	  'typeStr': /^\s*(\w+)\s*\(\s*(.*)\s*\)\s*$/,
-	  'emptyTypeStr': /^\s*(\w+)\s*EMPTY\s*$/,
-	  'spaces': /\s+/,
-	  'parenComma': /\)\s*,\s*\(/,
-	  'doubleParenComma': /\)\s*\)\s*,\s*\(\s*\(/, // can't use {2} here
-	  'trimParens': /^\s*\(?(.*?)\)?\s*$/
-	};
-
-	/**
-	 * Class for reading and writing Well-Known Text.
-	 *
-	 * NOTE: Adapted from OpenLayers 2.11 implementation.
-	 */
 
-	/** Create a new parser for WKT
-	 *
-	 * @param {GeometryFactory} geometryFactory
-	 * @return An instance of WKTParser.
-	 * @constructor
-	 * @private
-	 */
-	var WKTParser = function WKTParser (geometryFactory) {
-	  this.geometryFactory = geometryFactory || new GeometryFactory();
-	};
-	/**
-	 * Deserialize a WKT string and return a geometry. Supports WKT for POINT,
-	 * MULTIPOINT, LINESTRING, LINEARRING, MULTILINESTRING, POLYGON, MULTIPOLYGON,
-	 * and GEOMETRYCOLLECTION.
-	 *
-	 * @param {String} wkt A WKT string.
-	 * @return {Geometry} A geometry instance.
-	 * @private
-	 */
-	WKTParser.prototype.read = function read (wkt) {
-	  var geometry, type, str;
-	  wkt = wkt.replace(/[\n\r]/g, ' ');
-	  var matches = regExes.typeStr.exec(wkt);
-	  if (wkt.search('EMPTY') !== -1) {
-	    matches = regExes.emptyTypeStr.exec(wkt);
-	    matches[2] = undefined;
-	  }
-	  if (matches) {
-	    type = matches[1].toLowerCase();
-	    str = matches[2];
-	    if (parse$1[type]) {
-	      geometry = parse$1[type].apply(this, [str]);
+	    if (opts.what === 'edited' && context.history().difference().summary().length === 0) {
+	      messageType = 'no_edits';
 	    }
+
+	    selection.select('.box .message').html(_t.html('issues.no_issues.message.' + messageType));
 	  }
 
-	  if (geometry === undefined) { throw new Error('Could not parse WKT ' + wkt) }
+	  context.validator().on('validated.uiSectionValidationStatus', function () {
+	    window.requestIdleCallback(section.reRender);
+	  });
+	  context.map().on('move.uiSectionValidationStatus', debounce(function () {
+	    window.requestIdleCallback(section.reRender);
+	  }, 1000));
+	  return section;
+	}
+
+	function uiPaneIssues(context) {
+	  var issuesPane = uiPane('issues', context).key(_t('issues.key')).label(_t.html('issues.title')).description(_t.html('issues.title')).iconName('iD-icon-alert').sections([uiSectionValidationOptions(context), uiSectionValidationStatus(context), uiSectionValidationIssues('issues-errors', 'error', context), uiSectionValidationIssues('issues-warnings', 'warning', context), uiSectionValidationRules(context)]);
+	  return issuesPane;
+	}
 
-	  return geometry
-	};
+	function uiSettingsCustomData(context) {
+	  var dispatch = dispatch$8('change');
+
+	  function render(selection) {
+	    var dataLayer = context.layers().layer('data'); // keep separate copies of original and current settings
+
+	    var _origSettings = {
+	      fileList: dataLayer && dataLayer.fileList() || null,
+	      url: corePreferences('settings-custom-data-url')
+	    };
+	    var _currSettings = {
+	      fileList: dataLayer && dataLayer.fileList() || null,
+	      url: corePreferences('settings-custom-data-url')
+	    }; // var example = 'https://{switch:a,b,c}.tile.openstreetmap.org/{zoom}/{x}/{y}.png';
+
+	    var modal = uiConfirm(selection).okButton();
+	    modal.classed('settings-modal settings-custom-data', true);
+	    modal.select('.modal-section.header').append('h3').html(_t.html('settings.custom_data.header'));
+	    var textSection = modal.select('.modal-section.message-text');
+	    textSection.append('pre').attr('class', 'instructions-file').html(_t.html('settings.custom_data.file.instructions'));
+	    textSection.append('input').attr('class', 'field-file').attr('type', 'file').property('files', _currSettings.fileList) // works for all except IE11
+	    .on('change', function (d3_event) {
+	      var files = d3_event.target.files;
+
+	      if (files && files.length) {
+	        _currSettings.url = '';
+	        textSection.select('.field-url').property('value', '');
+	        _currSettings.fileList = files;
+	      } else {
+	        _currSettings.fileList = null;
+	      }
+	    });
+	    textSection.append('h4').html(_t.html('settings.custom_data.or'));
+	    textSection.append('pre').attr('class', 'instructions-url').html(_t.html('settings.custom_data.url.instructions'));
+	    textSection.append('textarea').attr('class', 'field-url').attr('placeholder', _t('settings.custom_data.url.placeholder')).call(utilNoAuto).property('value', _currSettings.url); // insert a cancel button
 
-	/**
-	 * Serialize a geometry into a WKT string.
-	 *
-	 * @param {Geometry} geometry A feature or array of features.
-	 * @return {String} The WKT string representation of the input geometries.
-	 * @private
-	 */
-	WKTParser.prototype.write = function write (geometry) {
-	  return this.extractGeometry(geometry)
-	};
+	    var buttonSection = modal.select('.modal-section.buttons');
+	    buttonSection.insert('button', '.ok-button').attr('class', 'button cancel-button secondary-action').html(_t.html('confirm.cancel'));
+	    buttonSection.select('.cancel-button').on('click.cancel', clickCancel);
+	    buttonSection.select('.ok-button').attr('disabled', isSaveDisabled).on('click.save', clickSave);
 
-	/**
-	 * Entry point to construct the WKT for a single Geometry object.
-	 *
-	 * @param {Geometry} geometry
-	 * @return {String} A WKT string of representing the geometry.
-	 * @private
-	 */
-	WKTParser.prototype.extractGeometry = function extractGeometry (geometry) {
-	  var type = geometry.getGeometryType().toLowerCase();
-	  if (!extract$1[type]) {
-	    return null
-	  }
-	  var wktType = type.toUpperCase();
-	  var data;
-	  if (geometry.isEmpty()) {
-	    data = wktType + ' EMPTY';
-	  } else {
-	    data = wktType + '(' + extract$1[type].apply(this, [geometry]) + ')';
-	  }
-	  return data
-	};
+	    function isSaveDisabled() {
+	      return null;
+	    } // restore the original url
 
-	/**
-	 * Object with properties corresponding to the geometry types. Property values
-	 * are functions that do the actual data extraction.
-	 * @private
-	 */
-	var extract$1 = {
-	  coordinate: function coordinate (coordinate$1) {
-	    return coordinate$1.x + ' ' + coordinate$1.y
-	  },
 
-	  /**
-	   * Return a space delimited string of point coordinates.
-	   *
-	   * @param {Point}
-	   *          point
-	   * @return {String} A string of coordinates representing the point.
-	   */
-	  point: function point (point$1) {
-	    return extract$1.coordinate.call(this, point$1._coordinates._coordinates[0])
-	  },
+	    function clickCancel() {
+	      textSection.select('.field-url').property('value', _origSettings.url);
+	      corePreferences('settings-custom-data-url', _origSettings.url);
+	      this.blur();
+	      modal.close();
+	    } // accept the current url
 
-	  /**
-	   * Return a comma delimited string of point coordinates from a multipoint.
-	   *
-	   * @param {MultiPoint}
-	   *          multipoint
-	   * @return {String} A string of point coordinate strings representing the
-	   *         multipoint.
-	   */
-	  multipoint: function multipoint (multipoint$1) {
-	    var this$1 = this;
 
-	    var array = [];
-	    for (var i = 0, len = multipoint$1._geometries.length; i < len; ++i) {
-	      array.push('(' + extract$1.point.apply(this$1, [multipoint$1._geometries[i]]) + ')');
-	    }
-	    return array.join(',')
-	  },
+	    function clickSave() {
+	      _currSettings.url = textSection.select('.field-url').property('value').trim(); // one or the other but not both
 
-	  /**
-	   * Return a comma delimited string of point coordinates from a line.
-	   *
-	   * @param {LineString} linestring
-	   * @return {String} A string of point coordinate strings representing the linestring.
-	   */
-	  linestring: function linestring (linestring$1) {
-	    var this$1 = this;
+	      if (_currSettings.url) {
+	        _currSettings.fileList = null;
+	      }
 
-	    var array = [];
-	    for (var i = 0, len = linestring$1._points._coordinates.length; i < len; ++i) {
-	      array.push(extract$1.coordinate.apply(this$1, [linestring$1._points._coordinates[i]]));
+	      if (_currSettings.fileList) {
+	        _currSettings.url = '';
+	      }
+
+	      corePreferences('settings-custom-data-url', _currSettings.url);
+	      this.blur();
+	      modal.close();
+	      dispatch.call('change', this, _currSettings);
 	    }
-	    return array.join(',')
-	  },
+	  }
 
-	  linearring: function linearring (linearring$1) {
-	    var this$1 = this;
+	  return utilRebind(render, dispatch, 'on');
+	}
 
-	    var array = [];
-	    for (var i = 0, len = linearring$1._points._coordinates.length; i < len; ++i) {
-	      array.push(extract$1.coordinate.apply(this$1, [linearring$1._points._coordinates[i]]));
-	    }
-	    return array.join(',')
-	  },
+	function uiSectionDataLayers(context) {
+	  var settingsCustomData = uiSettingsCustomData(context).on('change', customChanged);
+	  var layers = context.layers();
+	  var section = uiSection('data-layers', context).label(_t.html('map_data.data_layers')).disclosureContent(renderDisclosureContent);
 
-	  /**
-	   * Return a comma delimited string of linestring strings from a
-	   * multilinestring.
-	   *
-	   * @param {MultiLineString} multilinestring
-	   * @return {String} A string of of linestring strings representing the multilinestring.
-	   */
-	  multilinestring: function multilinestring (multilinestring$1) {
-	    var this$1 = this;
+	  function renderDisclosureContent(selection) {
+	    var container = selection.selectAll('.data-layer-container').data([0]);
+	    container.enter().append('div').attr('class', 'data-layer-container').merge(container).call(drawOsmItems).call(drawQAItems).call(drawCustomDataItems).call(drawVectorItems) // Beta - Detroit mapping challenge
+	    .call(drawPanelItems);
+	  }
 
-	    var array = [];
-	    for (var i = 0, len = multilinestring$1._geometries.length; i < len; ++i) {
-	      array.push('(' +
-	        extract$1.linestring.apply(this$1, [multilinestring$1._geometries[i]]) +
-	        ')');
+	  function showsLayer(which) {
+	    var layer = layers.layer(which);
+
+	    if (layer) {
+	      return layer.enabled();
 	    }
-	    return array.join(',')
-	  },
 
-	  /**
-	   * Return a comma delimited string of linear ring arrays from a polygon.
-	   *
-	   * @param {Polygon} polygon
-	   * @return {String} An array of linear ring arrays representing the polygon.
-	   */
-	  polygon: function polygon (polygon$1) {
-	    var this$1 = this;
+	    return false;
+	  }
 
-	    var array = [];
-	    array.push('(' + extract$1.linestring.apply(this, [polygon$1._shell]) + ')');
-	    for (var i = 0, len = polygon$1._holes.length; i < len; ++i) {
-	      array.push('(' + extract$1.linestring.apply(this$1, [polygon$1._holes[i]]) + ')');
-	    }
-	    return array.join(',')
-	  },
+	  function setLayer(which, enabled) {
+	    // Don't allow layer changes while drawing - #6584
+	    var mode = context.mode();
+	    if (mode && /^draw/.test(mode.id)) return;
+	    var layer = layers.layer(which);
 
-	  /**
-	   * Return an array of polygon arrays from a multipolygon.
-	   *
-	   * @param {MultiPolygon} multipolygon
-	   * @return {String} An array of polygon arrays representing the multipolygon.
-	   */
-	  multipolygon: function multipolygon (multipolygon$1) {
-	    var this$1 = this;
+	    if (layer) {
+	      layer.enabled(enabled);
 
-	    var array = [];
-	    for (var i = 0, len = multipolygon$1._geometries.length; i < len; ++i) {
-	      array.push('(' + extract$1.polygon.apply(this$1, [multipolygon$1._geometries[i]]) + ')');
+	      if (!enabled && (which === 'osm' || which === 'notes')) {
+	        context.enter(modeBrowse(context));
+	      }
 	    }
-	    return array.join(',')
-	  },
+	  }
 
-	  /**
-	   * Return the WKT portion between 'GEOMETRYCOLLECTION(' and ')' for an
-	   * geometrycollection.
-	   *
-	   * @param {GeometryCollection} collection
-	   * @return {String} internal WKT representation of the collection.
-	   */
-	  geometrycollection: function geometrycollection (collection) {
-	    var this$1 = this;
+	  function toggleLayer(which) {
+	    setLayer(which, !showsLayer(which));
+	  }
 
-	    var array = [];
-	    for (var i = 0, len = collection._geometries.length; i < len; ++i) {
-	      array.push(this$1.extractGeometry(collection._geometries[i]));
-	    }
-	    return array.join(',')
+	  function drawOsmItems(selection) {
+	    var osmKeys = ['osm', 'notes'];
+	    var osmLayers = layers.all().filter(function (obj) {
+	      return osmKeys.indexOf(obj.id) !== -1;
+	    });
+	    var ul = selection.selectAll('.layer-list-osm').data([0]);
+	    ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-osm').merge(ul);
+	    var li = ul.selectAll('.list-item').data(osmLayers);
+	    li.exit().remove();
+	    var liEnter = li.enter().append('li').attr('class', function (d) {
+	      return 'list-item list-item-' + d.id;
+	    });
+	    var labelEnter = liEnter.append('label').each(function (d) {
+	      if (d.id === 'osm') {
+	        select(this).call(uiTooltip().title(_t.html('map_data.layers.' + d.id + '.tooltip')).keys([uiCmd('⌥' + _t('area_fill.wireframe.key'))]).placement('bottom'));
+	      } else {
+	        select(this).call(uiTooltip().title(_t.html('map_data.layers.' + d.id + '.tooltip')).placement('bottom'));
+	      }
+	    });
+	    labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
+	      toggleLayer(d.id);
+	    });
+	    labelEnter.append('span').html(function (d) {
+	      return _t.html('map_data.layers.' + d.id + '.title');
+	    }); // Update
+
+	    li.merge(liEnter).classed('active', function (d) {
+	      return d.layer.enabled();
+	    }).selectAll('input').property('checked', function (d) {
+	      return d.layer.enabled();
+	    });
 	  }
-	};
 
-	/**
-	 * Object with properties corresponding to the geometry types. Property values
-	 * are functions that do the actual parsing.
-	 * @private
-	 */
-	var parse$1 = {
-	  /**
-	   * Return point geometry given a point WKT fragment.
-	   *
-	   * @param {String} str A WKT fragment representing the point.
-	   * @return {Point} A point geometry.
-	   * @private
-	   */
-	  point: function point (str) {
-	    if (str === undefined) {
-	      return this.geometryFactory.createPoint()
-	    }
+	  function drawQAItems(selection) {
+	    var qaKeys = ['keepRight', 'improveOSM', 'osmose'];
+	    var qaLayers = layers.all().filter(function (obj) {
+	      return qaKeys.indexOf(obj.id) !== -1;
+	    });
+	    var ul = selection.selectAll('.layer-list-qa').data([0]);
+	    ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-qa').merge(ul);
+	    var li = ul.selectAll('.list-item').data(qaLayers);
+	    li.exit().remove();
+	    var liEnter = li.enter().append('li').attr('class', function (d) {
+	      return 'list-item list-item-' + d.id;
+	    });
+	    var labelEnter = liEnter.append('label').each(function (d) {
+	      select(this).call(uiTooltip().title(_t.html('map_data.layers.' + d.id + '.tooltip')).placement('bottom'));
+	    });
+	    labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
+	      toggleLayer(d.id);
+	    });
+	    labelEnter.append('span').html(function (d) {
+	      return _t.html('map_data.layers.' + d.id + '.title');
+	    }); // Update
+
+	    li.merge(liEnter).classed('active', function (d) {
+	      return d.layer.enabled();
+	    }).selectAll('input').property('checked', function (d) {
+	      return d.layer.enabled();
+	    });
+	  } // Beta feature - sample vector layers to support Detroit Mapping Challenge
+	  // https://github.com/osmus/detroit-mapping-challenge
 
-	    var coords = str.trim().split(regExes.spaces);
-	    return this.geometryFactory.createPoint(new Coordinate(Number.parseFloat(coords[0]),
-	      Number.parseFloat(coords[1])))
-	  },
 
-	  /**
-	   * Return a multipoint geometry given a multipoint WKT fragment.
-	   *
-	   * @param {String} str A WKT fragment representing the multipoint.
-	   * @return {Point} A multipoint feature.
-	   * @private
-	   */
-	  multipoint: function multipoint (str) {
-	    var this$1 = this;
+	  function drawVectorItems(selection) {
+	    var dataLayer = layers.layer('data');
+	    var vtData = [{
+	      name: 'Detroit Neighborhoods/Parks',
+	      src: 'neighborhoods-parks',
+	      tooltip: 'Neighborhood boundaries and parks as compiled by City of Detroit in concert with community groups.',
+	      template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmur6x34562qp9iv1u3ksf-54hev,jonahadkins.cjksmqxdx33jj2wp90xd9x2md-4e5y2/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
+	    }, {
+	      name: 'Detroit Composite POIs',
+	      src: 'composite-poi',
+	      tooltip: 'Fire Inspections, Business Licenses, and other public location data collated from the City of Detroit.',
+	      template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmm6a02sli31myxhsr7zf3-2sw8h/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
+	    }, {
+	      name: 'Detroit All-The-Places POIs',
+	      src: 'alltheplaces-poi',
+	      tooltip: 'Public domain business location data created by web scrapers.',
+	      template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmswgk340g2vo06p1w9w0j-8fjjc/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
+	    }]; // Only show this if the map is around Detroit..
+
+	    var detroit = geoExtent([-83.5, 42.1], [-82.8, 42.5]);
+	    var showVectorItems = context.map().zoom() > 9 && detroit.contains(context.map().center());
+	    var container = selection.selectAll('.vectortile-container').data(showVectorItems ? [0] : []);
+	    container.exit().remove();
+	    var containerEnter = container.enter().append('div').attr('class', 'vectortile-container');
+	    containerEnter.append('h4').attr('class', 'vectortile-header').html('Detroit Vector Tiles (Beta)');
+	    containerEnter.append('ul').attr('class', 'layer-list layer-list-vectortile');
+	    containerEnter.append('div').attr('class', 'vectortile-footer').append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/osmus/detroit-mapping-challenge').append('span').html('About these layers');
+	    container = container.merge(containerEnter);
+	    var ul = container.selectAll('.layer-list-vectortile');
+	    var li = ul.selectAll('.list-item').data(vtData);
+	    li.exit().remove();
+	    var liEnter = li.enter().append('li').attr('class', function (d) {
+	      return 'list-item list-item-' + d.src;
+	    });
+	    var labelEnter = liEnter.append('label').each(function (d) {
+	      select(this).call(uiTooltip().title(d.tooltip).placement('top'));
+	    });
+	    labelEnter.append('input').attr('type', 'radio').attr('name', 'vectortile').on('change', selectVTLayer);
+	    labelEnter.append('span').html(function (d) {
+	      return d.name;
+	    }); // Update
 
-	    if (str === undefined) {
-	      return this.geometryFactory.createMultiPoint()
-	    }
+	    li.merge(liEnter).classed('active', isVTLayerSelected).selectAll('input').property('checked', isVTLayerSelected);
 
-	    var point;
-	    var points = str.trim().split(',');
-	    var components = [];
-	    for (var i = 0, len = points.length; i < len; ++i) {
-	      point = points[i].replace(regExes.trimParens, '$1');
-	      components.push(parse$1.point.apply(this$1, [point]));
+	    function isVTLayerSelected(d) {
+	      return dataLayer && dataLayer.template() === d.template;
 	    }
-	    return this.geometryFactory.createMultiPoint(components)
-	  },
 
-	  /**
-	   * Return a linestring geometry given a linestring WKT fragment.
-	   *
-	   * @param {String} str A WKT fragment representing the linestring.
-	   * @return {LineString} A linestring geometry.
-	   * @private
-	   */
-	  linestring: function linestring (str) {
-	    if (str === undefined) {
-	      return this.geometryFactory.createLineString()
-	    }
+	    function selectVTLayer(d3_event, d) {
+	      corePreferences('settings-custom-data-url', d.template);
 
-	    var points = str.trim().split(',');
-	    var components = [];
-	    var coords;
-	    for (var i = 0, len = points.length; i < len; ++i) {
-	      coords = points[i].trim().split(regExes.spaces);
-	      components.push(new Coordinate(Number.parseFloat(coords[0]), Number.parseFloat(coords[1])));
+	      if (dataLayer) {
+	        dataLayer.template(d.template, d.src);
+	        dataLayer.enabled(true);
+	      }
 	    }
-	    return this.geometryFactory.createLineString(components)
-	  },
+	  }
 
-	  /**
-	   * Return a linearring geometry given a linearring WKT fragment.
-	   *
-	   * @param {String} str A WKT fragment representing the linearring.
-	   * @return {LinearRing} A linearring geometry.
-	   * @private
-	   */
-	  linearring: function linearring (str) {
-	    if (str === undefined) {
-	      return this.geometryFactory.createLinearRing()
-	    }
+	  function drawCustomDataItems(selection) {
+	    var dataLayer = layers.layer('data');
+	    var hasData = dataLayer && dataLayer.hasData();
+	    var showsData = hasData && dataLayer.enabled();
+	    var ul = selection.selectAll('.layer-list-data').data(dataLayer ? [0] : []); // Exit
 
-	    var points = str.trim().split(',');
-	    var components = [];
-	    var coords;
-	    for (var i = 0, len = points.length; i < len; ++i) {
-	      coords = points[i].trim().split(regExes.spaces);
-	      components.push(new Coordinate(Number.parseFloat(coords[0]), Number.parseFloat(coords[1])));
-	    }
-	    return this.geometryFactory.createLinearRing(components)
-	  },
+	    ul.exit().remove(); // Enter
 
-	  /**
-	   * Return a multilinestring geometry given a multilinestring WKT fragment.
-	   *
-	   * @param {String} str A WKT fragment representing the multilinestring.
-	   * @return {MultiLineString} A multilinestring geometry.
-	   * @private
-	   */
-	  multilinestring: function multilinestring (str) {
-	    var this$1 = this;
+	    var ulEnter = ul.enter().append('ul').attr('class', 'layer-list layer-list-data');
+	    var liEnter = ulEnter.append('li').attr('class', 'list-item-data');
+	    var labelEnter = liEnter.append('label').call(uiTooltip().title(_t.html('map_data.layers.custom.tooltip')).placement('top'));
+	    labelEnter.append('input').attr('type', 'checkbox').on('change', function () {
+	      toggleLayer('data');
+	    });
+	    labelEnter.append('span').html(_t.html('map_data.layers.custom.title'));
+	    liEnter.append('button').attr('class', 'open-data-options').call(uiTooltip().title(_t.html('settings.custom_data.tooltip')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      editCustom();
+	    }).call(svgIcon('#iD-icon-more'));
+	    liEnter.append('button').attr('class', 'zoom-to-data').call(uiTooltip().title(_t.html('map_data.layers.custom.zoom')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).on('click', function (d3_event) {
+	      if (select(this).classed('disabled')) return;
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation();
+	      dataLayer.fitZoom();
+	    }).call(svgIcon('#iD-icon-framed-dot', 'monochrome')); // Update
 
-	    if (str === undefined) {
-	      return this.geometryFactory.createMultiLineString()
-	    }
+	    ul = ul.merge(ulEnter);
+	    ul.selectAll('.list-item-data').classed('active', showsData).selectAll('label').classed('deemphasize', !hasData).selectAll('input').property('disabled', !hasData).property('checked', showsData);
+	    ul.selectAll('button.zoom-to-data').classed('disabled', !hasData);
+	  }
 
-	    var line;
-	    var lines = str.trim().split(regExes.parenComma);
-	    var components = [];
-	    for (var i = 0, len = lines.length; i < len; ++i) {
-	      line = lines[i].replace(regExes.trimParens, '$1');
-	      components.push(parse$1.linestring.apply(this$1, [line]));
-	    }
-	    return this.geometryFactory.createMultiLineString(components)
-	  },
+	  function editCustom() {
+	    context.container().call(settingsCustomData);
+	  }
 
-	  /**
-	   * Return a polygon geometry given a polygon WKT fragment.
-	   *
-	   * @param {String} str A WKT fragment representing the polygon.
-	   * @return {Polygon} A polygon geometry.
-	   * @private
-	   */
-	  polygon: function polygon (str) {
-	    var this$1 = this;
+	  function customChanged(d) {
+	    var dataLayer = layers.layer('data');
 
-	    if (str === undefined) {
-	      return this.geometryFactory.createPolygon()
+	    if (d && d.url) {
+	      dataLayer.url(d.url);
+	    } else if (d && d.fileList) {
+	      dataLayer.fileList(d.fileList);
 	    }
+	  }
 
-	    var ring, linestring, linearring;
-	    var rings = str.trim().split(regExes.parenComma);
-	    var shell;
-	    var holes = [];
-	    for (var i = 0, len = rings.length; i < len; ++i) {
-	      ring = rings[i].replace(regExes.trimParens, '$1');
-	      linestring = parse$1.linestring.apply(this$1, [ring]);
-	      linearring = this$1.geometryFactory.createLinearRing(linestring._points);
-	      if (i === 0) {
-	        shell = linearring;
-	      } else {
-	        holes.push(linearring);
-	      }
-	    }
-	    return this.geometryFactory.createPolygon(shell, holes)
-	  },
+	  function drawPanelItems(selection) {
+	    var panelsListEnter = selection.selectAll('.md-extras-list').data([0]).enter().append('ul').attr('class', 'layer-list md-extras-list');
+	    var historyPanelLabelEnter = panelsListEnter.append('li').attr('class', 'history-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('map_data.history_panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.history.key'))]).placement('top'));
+	    historyPanelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.ui().info.toggle('history');
+	    });
+	    historyPanelLabelEnter.append('span').html(_t.html('map_data.history_panel.title'));
+	    var measurementPanelLabelEnter = panelsListEnter.append('li').attr('class', 'measurement-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('map_data.measurement_panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.measurement.key'))]).placement('top'));
+	    measurementPanelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.ui().info.toggle('measurement');
+	    });
+	    measurementPanelLabelEnter.append('span').html(_t.html('map_data.measurement_panel.title'));
+	  }
 
-	  /**
-	   * Return a multipolygon geometry given a multipolygon WKT fragment.
-	   *
-	   * @param {String} str A WKT fragment representing the multipolygon.
-	   * @return {MultiPolygon} A multipolygon geometry.
-	   * @private
-	   */
-	  multipolygon: function multipolygon (str) {
-	    var this$1 = this;
+	  context.layers().on('change.uiSectionDataLayers', section.reRender);
+	  context.map().on('move.uiSectionDataLayers', debounce(function () {
+	    // Detroit layers may have moved in or out of view
+	    window.requestIdleCallback(section.reRender);
+	  }, 1000));
+	  return section;
+	}
 
-	    if (str === undefined) {
-	      return this.geometryFactory.createMultiPolygon()
-	    }
+	function uiSectionMapFeatures(context) {
+	  var _features = context.features().keys();
+
+	  var section = uiSection('map-features', context).label(_t.html('map_data.map_features')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+
+	  function renderDisclosureContent(selection) {
+	    var container = selection.selectAll('.layer-feature-list-container').data([0]);
+	    var containerEnter = container.enter().append('div').attr('class', 'layer-feature-list-container');
+	    containerEnter.append('ul').attr('class', 'layer-list layer-feature-list');
+	    var footer = containerEnter.append('div').attr('class', 'feature-list-links section-footer');
+	    footer.append('a').attr('class', 'feature-list-link').attr('href', '#').html(_t.html('issues.disable_all')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.features().disableAll();
+	    });
+	    footer.append('a').attr('class', 'feature-list-link').attr('href', '#').html(_t.html('issues.enable_all')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.features().enableAll();
+	    }); // Update
 
-	    var polygon;
-	    var polygons = str.trim().split(regExes.doubleParenComma);
-	    var components = [];
-	    for (var i = 0, len = polygons.length; i < len; ++i) {
-	      polygon = polygons[i].replace(regExes.trimParens, '$1');
-	      components.push(parse$1.polygon.apply(this$1, [polygon]));
-	    }
-	    return this.geometryFactory.createMultiPolygon(components)
-	  },
+	    container = container.merge(containerEnter);
+	    container.selectAll('.layer-feature-list').call(drawListItems, _features, 'checkbox', 'feature', clickFeature, showsFeature);
+	  }
 
-	  /**
-	   * Return a geometrycollection given a geometrycollection WKT fragment.
-	   *
-	   * @param {String} str A WKT fragment representing the geometrycollection.
-	   * @return {GeometryCollection}
-	   * @private
-	   */
-	  geometrycollection: function geometrycollection (str) {
-	    var this$1 = this;
+	  function drawListItems(selection, data, type, name, change, active) {
+	    var items = selection.selectAll('li').data(data); // Exit
 
-	    if (str === undefined) {
-	      return this.geometryFactory.createGeometryCollection()
-	    }
+	    items.exit().remove(); // Enter
 
-	    // separate components of the collection with |
-	    str = str.replace(/,\s*([A-Za-z])/g, '|$1');
-	    var wktArray = str.trim().split('|');
-	    var components = [];
-	    for (var i = 0, len = wktArray.length; i < len; ++i) {
-	      components.push(this$1.read(wktArray[i]));
-	    }
-	    return this.geometryFactory.createGeometryCollection(components)
-	  }
-	};
+	    var enter = items.enter().append('li').call(uiTooltip().title(function (d) {
+	      var tip = _t.html(name + '.' + d + '.tooltip');
 
-	/**
-	 * Writes the Well-Known Text representation of a {@link Geometry}. The
-	 * Well-Known Text format is defined in the <A
-	 * HREF="http://www.opengis.org/techno/specs.htm"> OGC Simple Features
-	 * Specification for SQL</A>.
-	 * <p>
-	 * The <code>WKTWriter</code> outputs coordinates rounded to the precision
-	 * model. Only the maximum number of decimal places necessary to represent the
-	 * ordinates to the required precision will be output.
-	 * <p>
-	 * The SFS WKT spec does not define a special tag for {@link LinearRing}s.
-	 * Under the spec, rings are output as <code>LINESTRING</code>s.
-	 */
+	      if (autoHiddenFeature(d)) {
+	        var msg = showsLayer('osm') ? _t.html('map_data.autohidden') : _t.html('map_data.osmhidden');
+	        tip += '<div>' + msg + '</div>';
+	      }
 
-	/**
-	 * @param {GeometryFactory} geometryFactory
-	 * @constructor
-	 */
-	var WKTWriter = function WKTWriter (geometryFactory) {
-	  this.parser = new WKTParser(geometryFactory);
-	};
+	      return tip;
+	    }).placement('top'));
+	    var label = enter.append('label');
+	    label.append('input').attr('type', type).attr('name', name).on('change', change);
+	    label.append('span').html(function (d) {
+	      return _t.html(name + '.' + d + '.description');
+	    }); // Update
 
-	/**
-	 * Converts a <code>Geometry</code> to its Well-known Text representation.
-	 *
-	 * @param {Geometry} geometry a <code>Geometry</code> to process.
-	 * @return {string} a <Geometry Tagged Text> string (see the OpenGIS Simple
-	 *       Features Specification).
-	 * @memberof WKTWriter
-	 */
-	WKTWriter.prototype.write = function write (geometry) {
-	  return this.parser.write(geometry)
-	};
-	/**
-	 * Generates the WKT for a <tt>LINESTRING</tt> specified by two
-	 * {@link Coordinate}s.
-	 *
-	 * @param p0 the first coordinate.
-	 * @param p1 the second coordinate.
-	 *
-	 * @return the WKT.
-	 * @private
-	 */
-	WKTWriter.toLineString = function toLineString (p0, p1) {
-	  if (arguments.length !== 2) {
-	    throw new Error('Not implemented')
+	    items = items.merge(enter);
+	    items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', autoHiddenFeature);
 	  }
-	  return 'LINESTRING ( ' + p0.x + ' ' + p0.y + ', ' + p1.x + ' ' + p1.y + ' )'
-	};
 
-	var RuntimeException = (function (Error) {
-	  function RuntimeException (message) {
-	    Error.call(this, message);
-	    this.name = 'RuntimeException';
-	    this.message = message;
-	    this.stack = (new Error()).stack;
+	  function autoHiddenFeature(d) {
+	    return context.features().autoHidden(d);
 	  }
 
-	  if ( Error ) { RuntimeException.__proto__ = Error; }
-	  RuntimeException.prototype = Object.create( Error && Error.prototype );
-	  RuntimeException.prototype.constructor = RuntimeException;
-
-	  return RuntimeException;
-	}(Error));
+	  function showsFeature(d) {
+	    return context.features().enabled(d);
+	  }
 
-	var AssertionFailedException = (function (RuntimeException$$1) {
-	  function AssertionFailedException () {
-	    RuntimeException$$1.call(this);
-	    if (arguments.length === 0) {
-	      RuntimeException$$1.call(this);
-	    } else if (arguments.length === 1) {
-	      var message = arguments[0];
-	      RuntimeException$$1.call(this, message);
-	    }
+	  function clickFeature(d3_event, d) {
+	    context.features().toggle(d);
 	  }
 
-	  if ( RuntimeException$$1 ) { AssertionFailedException.__proto__ = RuntimeException$$1; }
-	  AssertionFailedException.prototype = Object.create( RuntimeException$$1 && RuntimeException$$1.prototype );
-	  AssertionFailedException.prototype.constructor = AssertionFailedException;
-	  AssertionFailedException.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  AssertionFailedException.prototype.getClass = function getClass () {
-	    return AssertionFailedException
-	  };
+	  function showsLayer(id) {
+	    var layer = context.layers().layer(id);
+	    return layer && layer.enabled();
+	  } // add listeners
 
-	  return AssertionFailedException;
-	}(RuntimeException));
 
-	var Assert = function Assert () {};
+	  context.features().on('change.map_features', section.reRender);
+	  return section;
+	}
 
-	Assert.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Assert.prototype.getClass = function getClass () {
-	  return Assert
-	};
-	Assert.shouldNeverReachHere = function shouldNeverReachHere () {
-	  if (arguments.length === 0) {
-	    Assert.shouldNeverReachHere(null);
-	  } else if (arguments.length === 1) {
-	    var message = arguments[0];
-	    throw new AssertionFailedException('Should never reach here' + (message !== null ? ': ' + message : ''))
-	  }
-	};
-	Assert.isTrue = function isTrue () {
-	  var assertion;
-	  var message;
-	  if (arguments.length === 1) {
-	    assertion = arguments[0];
-	    Assert.isTrue(assertion, null);
-	  } else if (arguments.length === 2) {
-	    assertion = arguments[0];
-	    message = arguments[1];
-	    if (!assertion) {
-	      if (message === null) {
-	        throw new AssertionFailedException()
-	      } else {
-	        throw new AssertionFailedException(message)
-	      }
-	    }
-	  }
-	};
-	Assert.equals = function equals () {
-	  var expectedValue;
-	  var actualValue;
-	  var message;
-	  if (arguments.length === 2) {
-	    expectedValue = arguments[0];
-	    actualValue = arguments[1];
-	    Assert.equals(expectedValue, actualValue, null);
-	  } else if (arguments.length === 3) {
-	    expectedValue = arguments[0];
-	    actualValue = arguments[1];
-	    message = arguments[2];
-	    if (!actualValue.equals(expectedValue)) {
-	      throw new AssertionFailedException('Expected ' + expectedValue + ' but encountered ' + actualValue + (message !== null ? ': ' + message : ''))
-	    }
+	function uiSectionMapStyleOptions(context) {
+	  var section = uiSection('fill-area', context).label(_t.html('map_data.style_options')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+
+	  function renderDisclosureContent(selection) {
+	    var container = selection.selectAll('.layer-fill-list').data([0]);
+	    container.enter().append('ul').attr('class', 'layer-list layer-fill-list').merge(container).call(drawListItems, context.map().areaFillOptions, 'radio', 'area_fill', setFill, isActiveFill);
+	    var container2 = selection.selectAll('.layer-visual-diff-list').data([0]);
+	    container2.enter().append('ul').attr('class', 'layer-list layer-visual-diff-list').merge(container2).call(drawListItems, ['highlight_edits'], 'checkbox', 'visual_diff', toggleHighlightEdited, function () {
+	      return context.surface().classed('highlight-edited');
+	    });
 	  }
-	};
 
-	var LineIntersector = function LineIntersector () {
-	  this._result = null;
-	  this._inputLines = Array(2).fill().map(function () { return Array(2); });
-	  this._intPt = new Array(2).fill(null);
-	  this._intLineIndex = null;
-	  this._isProper = null;
-	  this._pa = null;
-	  this._pb = null;
-	  this._precisionModel = null;
-	  this._intPt[0] = new Coordinate();
-	  this._intPt[1] = new Coordinate();
-	  this._pa = this._intPt[0];
-	  this._pb = this._intPt[1];
-	  this._result = 0;
-	};
+	  function drawListItems(selection, data, type, name, change, active) {
+	    var items = selection.selectAll('li').data(data); // Exit
 
-	var staticAccessors$10 = { DONT_INTERSECT: { configurable: true },DO_INTERSECT: { configurable: true },COLLINEAR: { configurable: true },NO_INTERSECTION: { configurable: true },POINT_INTERSECTION: { configurable: true },COLLINEAR_INTERSECTION: { configurable: true } };
-	LineIntersector.prototype.getIndexAlongSegment = function getIndexAlongSegment (segmentIndex, intIndex) {
-	  this.computeIntLineIndex();
-	  return this._intLineIndex[segmentIndex][intIndex]
-	};
-	LineIntersector.prototype.getTopologySummary = function getTopologySummary () {
-	  var catBuf = new StringBuffer();
-	  if (this.isEndPoint()) { catBuf.append(' endpoint'); }
-	  if (this._isProper) { catBuf.append(' proper'); }
-	  if (this.isCollinear()) { catBuf.append(' collinear'); }
-	  return catBuf.toString()
-	};
-	LineIntersector.prototype.computeIntersection = function computeIntersection (p1, p2, p3, p4) {
-	  this._inputLines[0][0] = p1;
-	  this._inputLines[0][1] = p2;
-	  this._inputLines[1][0] = p3;
-	  this._inputLines[1][1] = p4;
-	  this._result = this.computeIntersect(p1, p2, p3, p4);
-	};
-	LineIntersector.prototype.getIntersectionNum = function getIntersectionNum () {
-	  return this._result
-	};
-	LineIntersector.prototype.computeIntLineIndex = function computeIntLineIndex () {
-	  if (arguments.length === 0) {
-	    if (this._intLineIndex === null) {
-	      this._intLineIndex = Array(2).fill().map(function () { return Array(2); });
-	      this.computeIntLineIndex(0);
-	      this.computeIntLineIndex(1);
-	    }
-	  } else if (arguments.length === 1) {
-	    var segmentIndex = arguments[0];
-	    var dist0 = this.getEdgeDistance(segmentIndex, 0);
-	    var dist1 = this.getEdgeDistance(segmentIndex, 1);
-	    if (dist0 > dist1) {
-	      this._intLineIndex[segmentIndex][0] = 0;
-	      this._intLineIndex[segmentIndex][1] = 1;
-	    } else {
-	      this._intLineIndex[segmentIndex][0] = 1;
-	      this._intLineIndex[segmentIndex][1] = 0;
-	    }
+	    items.exit().remove(); // Enter
+
+	    var enter = items.enter().append('li').call(uiTooltip().title(function (d) {
+	      return _t.html(name + '.' + d + '.tooltip');
+	    }).keys(function (d) {
+	      var key = d === 'wireframe' ? _t('area_fill.wireframe.key') : null;
+	      if (d === 'highlight_edits') key = _t('map_data.highlight_edits.key');
+	      return key ? [key] : null;
+	    }).placement('top'));
+	    var label = enter.append('label');
+	    label.append('input').attr('type', type).attr('name', name).on('change', change);
+	    label.append('span').html(function (d) {
+	      return _t.html(name + '.' + d + '.description');
+	    }); // Update
+
+	    items = items.merge(enter);
+	    items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', false);
 	  }
-	};
-	LineIntersector.prototype.isProper = function isProper () {
-	  return this.hasIntersection() && this._isProper
-	};
-	LineIntersector.prototype.setPrecisionModel = function setPrecisionModel (precisionModel) {
-	  this._precisionModel = precisionModel;
-	};
-	LineIntersector.prototype.isInteriorIntersection = function isInteriorIntersection () {
-	    var this$1 = this;
 
-	  if (arguments.length === 0) {
-	    if (this.isInteriorIntersection(0)) { return true }
-	    if (this.isInteriorIntersection(1)) { return true }
-	    return false
-	  } else if (arguments.length === 1) {
-	    var inputLineIndex = arguments[0];
-	    for (var i = 0; i < this._result; i++) {
-	      if (!(this$1._intPt[i].equals2D(this$1._inputLines[inputLineIndex][0]) || this$1._intPt[i].equals2D(this$1._inputLines[inputLineIndex][1]))) {
-	        return true
-	      }
-	    }
-	    return false
+	  function isActiveFill(d) {
+	    return context.map().activeAreaFill() === d;
 	  }
-	};
-	LineIntersector.prototype.getIntersection = function getIntersection (intIndex) {
-	  return this._intPt[intIndex]
-	};
-	LineIntersector.prototype.isEndPoint = function isEndPoint () {
-	  return this.hasIntersection() && !this._isProper
-	};
-	LineIntersector.prototype.hasIntersection = function hasIntersection () {
-	  return this._result !== LineIntersector.NO_INTERSECTION
-	};
-	LineIntersector.prototype.getEdgeDistance = function getEdgeDistance (segmentIndex, intIndex) {
-	  var dist = LineIntersector.computeEdgeDistance(this._intPt[intIndex], this._inputLines[segmentIndex][0], this._inputLines[segmentIndex][1]);
-	  return dist
-	};
-	LineIntersector.prototype.isCollinear = function isCollinear () {
-	  return this._result === LineIntersector.COLLINEAR_INTERSECTION
-	};
-	LineIntersector.prototype.toString = function toString () {
-	  return WKTWriter.toLineString(this._inputLines[0][0], this._inputLines[0][1]) + ' - ' + WKTWriter.toLineString(this._inputLines[1][0], this._inputLines[1][1]) + this.getTopologySummary()
-	};
-	LineIntersector.prototype.getEndpoint = function getEndpoint (segmentIndex, ptIndex) {
-	  return this._inputLines[segmentIndex][ptIndex]
-	};
-	LineIntersector.prototype.isIntersection = function isIntersection (pt) {
-	    var this$1 = this;
 
-	  for (var i = 0; i < this._result; i++) {
-	    if (this$1._intPt[i].equals2D(pt)) {
-	      return true
-	    }
+	  function toggleHighlightEdited(d3_event) {
+	    d3_event.preventDefault();
+	    context.map().toggleHighlightEdited();
 	  }
-	  return false
-	};
-	LineIntersector.prototype.getIntersectionAlongSegment = function getIntersectionAlongSegment (segmentIndex, intIndex) {
-	  this.computeIntLineIndex();
-	  return this._intPt[this._intLineIndex[segmentIndex][intIndex]]
-	};
-	LineIntersector.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	LineIntersector.prototype.getClass = function getClass () {
-	  return LineIntersector
-	};
-	LineIntersector.computeEdgeDistance = function computeEdgeDistance (p, p0, p1) {
-	  var dx = Math.abs(p1.x - p0.x);
-	  var dy = Math.abs(p1.y - p0.y);
-	  var dist = -1.0;
-	  if (p.equals(p0)) {
-	    dist = 0.0;
-	  } else if (p.equals(p1)) {
-	    if (dx > dy) { dist = dx; } else { dist = dy; }
-	  } else {
-	    var pdx = Math.abs(p.x - p0.x);
-	    var pdy = Math.abs(p.y - p0.y);
-	    if (dx > dy) { dist = pdx; } else { dist = pdy; }
-	    if (dist === 0.0 && !p.equals(p0)) {
-	      dist = Math.max(pdx, pdy);
-	    }
+
+	  function setFill(d3_event, d) {
+	    context.map().activeAreaFill(d);
 	  }
-	  Assert.isTrue(!(dist === 0.0 && !p.equals(p0)), 'Bad distance calculation');
-	  return dist
-	};
-	LineIntersector.nonRobustComputeEdgeDistance = function nonRobustComputeEdgeDistance (p, p1, p2) {
-	  var dx = p.x - p1.x;
-	  var dy = p.y - p1.y;
-	  var dist = Math.sqrt(dx * dx + dy * dy);
-	  Assert.isTrue(!(dist === 0.0 && !p.equals(p1)), 'Invalid distance calculation');
-	  return dist
-	};
-	staticAccessors$10.DONT_INTERSECT.get = function () { return 0 };
-	staticAccessors$10.DO_INTERSECT.get = function () { return 1 };
-	staticAccessors$10.COLLINEAR.get = function () { return 2 };
-	staticAccessors$10.NO_INTERSECTION.get = function () { return 0 };
-	staticAccessors$10.POINT_INTERSECTION.get = function () { return 1 };
-	staticAccessors$10.COLLINEAR_INTERSECTION.get = function () { return 2 };
-
-	Object.defineProperties( LineIntersector, staticAccessors$10 );
-
-	var RobustLineIntersector = (function (LineIntersector$$1) {
-	  function RobustLineIntersector () {
-	    LineIntersector$$1.apply(this, arguments);
-	  }
-
-	  if ( LineIntersector$$1 ) { RobustLineIntersector.__proto__ = LineIntersector$$1; }
-	  RobustLineIntersector.prototype = Object.create( LineIntersector$$1 && LineIntersector$$1.prototype );
-	  RobustLineIntersector.prototype.constructor = RobustLineIntersector;
-
-	  RobustLineIntersector.prototype.isInSegmentEnvelopes = function isInSegmentEnvelopes (intPt) {
-	    var env0 = new Envelope(this._inputLines[0][0], this._inputLines[0][1]);
-	    var env1 = new Envelope(this._inputLines[1][0], this._inputLines[1][1]);
-	    return env0.contains(intPt) && env1.contains(intPt)
-	  };
-	  RobustLineIntersector.prototype.computeIntersection = function computeIntersection () {
-	    if (arguments.length === 3) {
-	      var p = arguments[0];
-	      var p1 = arguments[1];
-	      var p2 = arguments[2];
-	      this._isProper = false;
-	      if (Envelope.intersects(p1, p2, p)) {
-	        if (CGAlgorithms.orientationIndex(p1, p2, p) === 0 && CGAlgorithms.orientationIndex(p2, p1, p) === 0) {
-	          this._isProper = true;
-	          if (p.equals(p1) || p.equals(p2)) {
-	            this._isProper = false;
-	          }
-	          this._result = LineIntersector$$1.POINT_INTERSECTION;
-	          return null
-	        }
-	      }
-	      this._result = LineIntersector$$1.NO_INTERSECTION;
-	    } else { return LineIntersector$$1.prototype.computeIntersection.apply(this, arguments) }
-	  };
-	  RobustLineIntersector.prototype.normalizeToMinimum = function normalizeToMinimum (n1, n2, n3, n4, normPt) {
-	    normPt.x = this.smallestInAbsValue(n1.x, n2.x, n3.x, n4.x);
-	    normPt.y = this.smallestInAbsValue(n1.y, n2.y, n3.y, n4.y);
-	    n1.x -= normPt.x;
-	    n1.y -= normPt.y;
-	    n2.x -= normPt.x;
-	    n2.y -= normPt.y;
-	    n3.x -= normPt.x;
-	    n3.y -= normPt.y;
-	    n4.x -= normPt.x;
-	    n4.y -= normPt.y;
-	  };
-	  RobustLineIntersector.prototype.safeHCoordinateIntersection = function safeHCoordinateIntersection (p1, p2, q1, q2) {
-	    var intPt = null;
-	    try {
-	      intPt = HCoordinate.intersection(p1, p2, q1, q2);
-	    } catch (e) {
-	      if (e instanceof NotRepresentableException) {
-	        intPt = RobustLineIntersector.nearestEndpoint(p1, p2, q1, q2);
-	      } else { throw e }
-	    } finally {}
-	    return intPt
-	  };
-	  RobustLineIntersector.prototype.intersection = function intersection (p1, p2, q1, q2) {
-	    var intPt = this.intersectionWithNormalization(p1, p2, q1, q2);
-	    if (!this.isInSegmentEnvelopes(intPt)) {
-	      intPt = new Coordinate(RobustLineIntersector.nearestEndpoint(p1, p2, q1, q2));
-	    }
-	    if (this._precisionModel !== null) {
-	      this._precisionModel.makePrecise(intPt);
-	    }
-	    return intPt
-	  };
-	  RobustLineIntersector.prototype.smallestInAbsValue = function smallestInAbsValue (x1, x2, x3, x4) {
-	    var x = x1;
-	    var xabs = Math.abs(x);
-	    if (Math.abs(x2) < xabs) {
-	      x = x2;
-	      xabs = Math.abs(x2);
-	    }
-	    if (Math.abs(x3) < xabs) {
-	      x = x3;
-	      xabs = Math.abs(x3);
-	    }
-	    if (Math.abs(x4) < xabs) {
-	      x = x4;
-	    }
-	    return x
-	  };
-	  RobustLineIntersector.prototype.checkDD = function checkDD (p1, p2, q1, q2, intPt) {
-	    var intPtDD = CGAlgorithmsDD.intersection(p1, p2, q1, q2);
-	    var isIn = this.isInSegmentEnvelopes(intPtDD);
-	    System.out.println('DD in env = ' + isIn + '  --------------------- ' + intPtDD);
-	    if (intPt.distance(intPtDD) > 0.0001) {
-	      System.out.println('Distance = ' + intPt.distance(intPtDD));
-	    }
-	  };
-	  RobustLineIntersector.prototype.intersectionWithNormalization = function intersectionWithNormalization (p1, p2, q1, q2) {
-	    var n1 = new Coordinate(p1);
-	    var n2 = new Coordinate(p2);
-	    var n3 = new Coordinate(q1);
-	    var n4 = new Coordinate(q2);
-	    var normPt = new Coordinate();
-	    this.normalizeToEnvCentre(n1, n2, n3, n4, normPt);
-	    var intPt = this.safeHCoordinateIntersection(n1, n2, n3, n4);
-	    intPt.x += normPt.x;
-	    intPt.y += normPt.y;
-	    return intPt
-	  };
-	  RobustLineIntersector.prototype.computeCollinearIntersection = function computeCollinearIntersection (p1, p2, q1, q2) {
-	    var p1q1p2 = Envelope.intersects(p1, p2, q1);
-	    var p1q2p2 = Envelope.intersects(p1, p2, q2);
-	    var q1p1q2 = Envelope.intersects(q1, q2, p1);
-	    var q1p2q2 = Envelope.intersects(q1, q2, p2);
-	    if (p1q1p2 && p1q2p2) {
-	      this._intPt[0] = q1;
-	      this._intPt[1] = q2;
-	      return LineIntersector$$1.COLLINEAR_INTERSECTION
-	    }
-	    if (q1p1q2 && q1p2q2) {
-	      this._intPt[0] = p1;
-	      this._intPt[1] = p2;
-	      return LineIntersector$$1.COLLINEAR_INTERSECTION
-	    }
-	    if (p1q1p2 && q1p1q2) {
-	      this._intPt[0] = q1;
-	      this._intPt[1] = p1;
-	      return q1.equals(p1) && !p1q2p2 && !q1p2q2 ? LineIntersector$$1.POINT_INTERSECTION : LineIntersector$$1.COLLINEAR_INTERSECTION
-	    }
-	    if (p1q1p2 && q1p2q2) {
-	      this._intPt[0] = q1;
-	      this._intPt[1] = p2;
-	      return q1.equals(p2) && !p1q2p2 && !q1p1q2 ? LineIntersector$$1.POINT_INTERSECTION : LineIntersector$$1.COLLINEAR_INTERSECTION
-	    }
-	    if (p1q2p2 && q1p1q2) {
-	      this._intPt[0] = q2;
-	      this._intPt[1] = p1;
-	      return q2.equals(p1) && !p1q1p2 && !q1p2q2 ? LineIntersector$$1.POINT_INTERSECTION : LineIntersector$$1.COLLINEAR_INTERSECTION
-	    }
-	    if (p1q2p2 && q1p2q2) {
-	      this._intPt[0] = q2;
-	      this._intPt[1] = p2;
-	      return q2.equals(p2) && !p1q1p2 && !q1p1q2 ? LineIntersector$$1.POINT_INTERSECTION : LineIntersector$$1.COLLINEAR_INTERSECTION
-	    }
-	    return LineIntersector$$1.NO_INTERSECTION
-	  };
-	  RobustLineIntersector.prototype.normalizeToEnvCentre = function normalizeToEnvCentre (n00, n01, n10, n11, normPt) {
-	    var minX0 = n00.x < n01.x ? n00.x : n01.x;
-	    var minY0 = n00.y < n01.y ? n00.y : n01.y;
-	    var maxX0 = n00.x > n01.x ? n00.x : n01.x;
-	    var maxY0 = n00.y > n01.y ? n00.y : n01.y;
-	    var minX1 = n10.x < n11.x ? n10.x : n11.x;
-	    var minY1 = n10.y < n11.y ? n10.y : n11.y;
-	    var maxX1 = n10.x > n11.x ? n10.x : n11.x;
-	    var maxY1 = n10.y > n11.y ? n10.y : n11.y;
-	    var intMinX = minX0 > minX1 ? minX0 : minX1;
-	    var intMaxX = maxX0 < maxX1 ? maxX0 : maxX1;
-	    var intMinY = minY0 > minY1 ? minY0 : minY1;
-	    var intMaxY = maxY0 < maxY1 ? maxY0 : maxY1;
-	    var intMidX = (intMinX + intMaxX) / 2.0;
-	    var intMidY = (intMinY + intMaxY) / 2.0;
-	    normPt.x = intMidX;
-	    normPt.y = intMidY;
-	    n00.x -= normPt.x;
-	    n00.y -= normPt.y;
-	    n01.x -= normPt.x;
-	    n01.y -= normPt.y;
-	    n10.x -= normPt.x;
-	    n10.y -= normPt.y;
-	    n11.x -= normPt.x;
-	    n11.y -= normPt.y;
-	  };
-	  RobustLineIntersector.prototype.computeIntersect = function computeIntersect (p1, p2, q1, q2) {
-	    this._isProper = false;
-	    if (!Envelope.intersects(p1, p2, q1, q2)) { return LineIntersector$$1.NO_INTERSECTION }
-	    var Pq1 = CGAlgorithms.orientationIndex(p1, p2, q1);
-	    var Pq2 = CGAlgorithms.orientationIndex(p1, p2, q2);
-	    if ((Pq1 > 0 && Pq2 > 0) || (Pq1 < 0 && Pq2 < 0)) {
-	      return LineIntersector$$1.NO_INTERSECTION
-	    }
-	    var Qp1 = CGAlgorithms.orientationIndex(q1, q2, p1);
-	    var Qp2 = CGAlgorithms.orientationIndex(q1, q2, p2);
-	    if ((Qp1 > 0 && Qp2 > 0) || (Qp1 < 0 && Qp2 < 0)) {
-	      return LineIntersector$$1.NO_INTERSECTION
-	    }
-	    var collinear = Pq1 === 0 && Pq2 === 0 && Qp1 === 0 && Qp2 === 0;
-	    if (collinear) {
-	      return this.computeCollinearIntersection(p1, p2, q1, q2)
-	    }
-	    if (Pq1 === 0 || Pq2 === 0 || Qp1 === 0 || Qp2 === 0) {
-	      this._isProper = false;
-	      if (p1.equals2D(q1) || p1.equals2D(q2)) {
-	        this._intPt[0] = p1;
-	      } else if (p2.equals2D(q1) || p2.equals2D(q2)) {
-	        this._intPt[0] = p2;
-	      } else if (Pq1 === 0) {
-	        this._intPt[0] = new Coordinate(q1);
-	      } else if (Pq2 === 0) {
-	        this._intPt[0] = new Coordinate(q2);
-	      } else if (Qp1 === 0) {
-	        this._intPt[0] = new Coordinate(p1);
-	      } else if (Qp2 === 0) {
-	        this._intPt[0] = new Coordinate(p2);
-	      }
-	    } else {
-	      this._isProper = true;
-	      this._intPt[0] = this.intersection(p1, p2, q1, q2);
-	    }
-	    return LineIntersector$$1.POINT_INTERSECTION
-	  };
-	  RobustLineIntersector.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  RobustLineIntersector.prototype.getClass = function getClass () {
-	    return RobustLineIntersector
-	  };
-	  RobustLineIntersector.nearestEndpoint = function nearestEndpoint (p1, p2, q1, q2) {
-	    var nearestPt = p1;
-	    var minDist = CGAlgorithms.distancePointLine(p1, q1, q2);
-	    var dist = CGAlgorithms.distancePointLine(p2, q1, q2);
-	    if (dist < minDist) {
-	      minDist = dist;
-	      nearestPt = p2;
-	    }
-	    dist = CGAlgorithms.distancePointLine(q1, p1, p2);
-	    if (dist < minDist) {
-	      minDist = dist;
-	      nearestPt = q1;
-	    }
-	    dist = CGAlgorithms.distancePointLine(q2, p1, p2);
-	    if (dist < minDist) {
-	      minDist = dist;
-	      nearestPt = q2;
-	    }
-	    return nearestPt
-	  };
 
-	  return RobustLineIntersector;
-	}(LineIntersector));
+	  context.map().on('changeHighlighting.ui_style, changeAreaFill.ui_style', section.reRender);
+	  return section;
+	}
 
-	var RobustDeterminant = function RobustDeterminant () {};
+	function uiSectionPhotoOverlays(context) {
+	  var layers = context.layers();
+	  var section = uiSection('photo-overlays', context).label(_t.html('photo_overlays.title')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
 
-	RobustDeterminant.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	RobustDeterminant.prototype.getClass = function getClass () {
-	  return RobustDeterminant
-	};
-	RobustDeterminant.orientationIndex = function orientationIndex (p1, p2, q) {
-	  var dx1 = p2.x - p1.x;
-	  var dy1 = p2.y - p1.y;
-	  var dx2 = q.x - p2.x;
-	  var dy2 = q.y - p2.y;
-	  return RobustDeterminant.signOfDet2x2(dx1, dy1, dx2, dy2)
-	};
-	RobustDeterminant.signOfDet2x2 = function signOfDet2x2 (x1, y1, x2, y2) {
-	  var sign = null;
-	  var swap = null;
-	  var k = null;
-	  sign = 1;
-	  if (x1 === 0.0 || y2 === 0.0) {
-	    if (y1 === 0.0 || x2 === 0.0) {
-	      return 0
-	    } else if (y1 > 0) {
-	      if (x2 > 0) {
-	        return -sign
-	      } else {
-	        return sign
-	      }
-	    } else {
-	      if (x2 > 0) {
-	        return sign
-	      } else {
-	        return -sign
-	      }
-	    }
-	  }
-	  if (y1 === 0.0 || x2 === 0.0) {
-	    if (y2 > 0) {
-	      if (x1 > 0) {
-	        return sign
-	      } else {
-	        return -sign
-	      }
-	    } else {
-	      if (x1 > 0) {
-	        return -sign
-	      } else {
-	        return sign
-	      }
-	    }
+	  function renderDisclosureContent(selection) {
+	    var container = selection.selectAll('.photo-overlay-container').data([0]);
+	    container.enter().append('div').attr('class', 'photo-overlay-container').merge(container).call(drawPhotoItems).call(drawPhotoTypeItems).call(drawDateFilter).call(drawUsernameFilter);
 	  }
-	  if (y1 > 0.0) {
-	    if (y2 > 0.0) {
-	      if (y1 <= y2) ; else {
-	        sign = -sign;
-	        swap = x1;
-	        x1 = x2;
-	        x2 = swap;
-	        swap = y1;
-	        y1 = y2;
-	        y2 = swap;
-	      }
-	    } else {
-	      if (y1 <= -y2) {
-	        sign = -sign;
-	        x2 = -x2;
-	        y2 = -y2;
-	      } else {
-	        swap = x1;
-	        x1 = -x2;
-	        x2 = swap;
-	        swap = y1;
-	        y1 = -y2;
-	        y2 = swap;
-	      }
-	    }
-	  } else {
-	    if (y2 > 0.0) {
-	      if (-y1 <= y2) {
-	        sign = -sign;
-	        x1 = -x1;
-	        y1 = -y1;
-	      } else {
-	        swap = -x1;
-	        x1 = x2;
-	        x2 = swap;
-	        swap = -y1;
-	        y1 = y2;
-	        y2 = swap;
-	      }
-	    } else {
-	      if (y1 >= y2) {
-	        x1 = -x1;
-	        y1 = -y1;
-	        x2 = -x2;
-	        y2 = -y2;
-	      } else {
-	        sign = -sign;
-	        swap = -x1;
-	        x1 = -x2;
-	        x2 = swap;
-	        swap = -y1;
-	        y1 = -y2;
-	        y2 = swap;
-	      }
+
+	  function drawPhotoItems(selection) {
+	    var photoKeys = context.photos().overlayLayerIDs();
+	    var photoLayers = layers.all().filter(function (obj) {
+	      return photoKeys.indexOf(obj.id) !== -1;
+	    });
+	    var data = photoLayers.filter(function (obj) {
+	      return obj.layer.supported();
+	    });
+
+	    function layerSupported(d) {
+	      return d.layer && d.layer.supported();
 	    }
-	  }
-	  if (x1 > 0.0) {
-	    if (x2 > 0.0) {
-	      if (x1 <= x2) ; else {
-	        return sign
-	      }
-	    } else {
-	      return sign
+
+	    function layerEnabled(d) {
+	      return layerSupported(d) && d.layer.enabled();
 	    }
-	  } else {
-	    if (x2 > 0.0) {
-	      return -sign
-	    } else {
-	      if (x1 >= x2) {
-	        sign = -sign;
-	        x1 = -x1;
-	        x2 = -x2;
-	      } else {
-	        return -sign
+
+	    var ul = selection.selectAll('.layer-list-photos').data([0]);
+	    ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-photos').merge(ul);
+	    var li = ul.selectAll('.list-item-photos').data(data);
+	    li.exit().remove();
+	    var liEnter = li.enter().append('li').attr('class', function (d) {
+	      var classes = 'list-item-photos list-item-' + d.id;
+
+	      if (d.id === 'mapillary-signs' || d.id === 'mapillary-map-features') {
+	        classes += ' indented';
 	      }
-	    }
+
+	      return classes;
+	    });
+	    var labelEnter = liEnter.append('label').each(function (d) {
+	      var titleID;
+	      if (d.id === 'mapillary-signs') titleID = 'mapillary.signs.tooltip';else if (d.id === 'mapillary') titleID = 'mapillary_images.tooltip';else if (d.id === 'openstreetcam') titleID = 'openstreetcam_images.tooltip';else titleID = d.id.replace(/-/g, '_') + '.tooltip';
+	      select(this).call(uiTooltip().title(_t.html(titleID)).placement('top'));
+	    });
+	    labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
+	      toggleLayer(d.id);
+	    });
+	    labelEnter.append('span').html(function (d) {
+	      var id = d.id;
+	      if (id === 'mapillary-signs') id = 'photo_overlays.traffic_signs';
+	      return _t.html(id.replace(/-/g, '_') + '.title');
+	    }); // Update
+
+	    li.merge(liEnter).classed('active', layerEnabled).selectAll('input').property('checked', layerEnabled);
 	  }
-	  while (true) {
-	    k = Math.floor(x2 / x1);
-	    x2 = x2 - k * x1;
-	    y2 = y2 - k * y1;
-	    if (y2 < 0.0) {
-	      return -sign
-	    }
-	    if (y2 > y1) {
-	      return sign
-	    }
-	    if (x1 > x2 + x2) {
-	      if (y1 < y2 + y2) {
-	        return sign
-	      }
-	    } else {
-	      if (y1 > y2 + y2) {
-	        return -sign
-	      } else {
-	        x2 = x1 - x2;
-	        y2 = y1 - y2;
-	        sign = -sign;
-	      }
-	    }
-	    if (y2 === 0.0) {
-	      if (x2 === 0.0) {
-	        return 0
-	      } else {
-	        return -sign
-	      }
-	    }
-	    if (x2 === 0.0) {
-	      return sign
-	    }
-	    k = Math.floor(x1 / x2);
-	    x1 = x1 - k * x2;
-	    y1 = y1 - k * y2;
-	    if (y1 < 0.0) {
-	      return sign
-	    }
-	    if (y1 > y2) {
-	      return -sign
-	    }
-	    if (x2 > x1 + x1) {
-	      if (y2 < y1 + y1) {
-	        return -sign
-	      }
-	    } else {
-	      if (y2 > y1 + y1) {
-	        return sign
-	      } else {
-	        x1 = x2 - x1;
-	        y1 = y2 - y1;
-	        sign = -sign;
-	      }
-	    }
-	    if (y1 === 0.0) {
-	      if (x1 === 0.0) {
-	        return 0
-	      } else {
-	        return sign
-	      }
-	    }
-	    if (x1 === 0.0) {
-	      return -sign
+
+	  function drawPhotoTypeItems(selection) {
+	    var data = context.photos().allPhotoTypes();
+
+	    function typeEnabled(d) {
+	      return context.photos().showsPhotoType(d);
 	    }
+
+	    var ul = selection.selectAll('.layer-list-photo-types').data([0]);
+	    ul.exit().remove();
+	    ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-photo-types').merge(ul);
+	    var li = ul.selectAll('.list-item-photo-types').data(context.photos().shouldFilterByPhotoType() ? data : []);
+	    li.exit().remove();
+	    var liEnter = li.enter().append('li').attr('class', function (d) {
+	      return 'list-item-photo-types list-item-' + d;
+	    });
+	    var labelEnter = liEnter.append('label').each(function (d) {
+	      select(this).call(uiTooltip().title(_t.html('photo_overlays.photo_type.' + d + '.tooltip')).placement('top'));
+	    });
+	    labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
+	      context.photos().togglePhotoType(d);
+	    });
+	    labelEnter.append('span').html(function (d) {
+	      return _t.html('photo_overlays.photo_type.' + d + '.title');
+	    }); // Update
+
+	    li.merge(liEnter).classed('active', typeEnabled).selectAll('input').property('checked', typeEnabled);
 	  }
-	};
 
-	var RayCrossingCounter = function RayCrossingCounter () {
-	  this._p = null;
-	  this._crossingCount = 0;
-	  this._isPointOnSegment = false;
-	  var p = arguments[0];
-	  this._p = p;
-	};
-	RayCrossingCounter.prototype.countSegment = function countSegment (p1, p2) {
-	  if (p1.x < this._p.x && p2.x < this._p.x) { return null }
-	  if (this._p.x === p2.x && this._p.y === p2.y) {
-	    this._isPointOnSegment = true;
-	    return null
-	  }
-	  if (p1.y === this._p.y && p2.y === this._p.y) {
-	    var minx = p1.x;
-	    var maxx = p2.x;
-	    if (minx > maxx) {
-	      minx = p2.x;
-	      maxx = p1.x;
-	    }
-	    if (this._p.x >= minx && this._p.x <= maxx) {
-	      this._isPointOnSegment = true;
-	    }
-	    return null
-	  }
-	  if ((p1.y > this._p.y && p2.y <= this._p.y) || (p2.y > this._p.y && p1.y <= this._p.y)) {
-	    var x1 = p1.x - this._p.x;
-	    var y1 = p1.y - this._p.y;
-	    var x2 = p2.x - this._p.x;
-	    var y2 = p2.y - this._p.y;
-	    var xIntSign = RobustDeterminant.signOfDet2x2(x1, y1, x2, y2);
-	    if (xIntSign === 0.0) {
-	      this._isPointOnSegment = true;
-	      return null
-	    }
-	    if (y2 < y1) { xIntSign = -xIntSign; }
-	    if (xIntSign > 0.0) {
-	      this._crossingCount++;
+	  function drawDateFilter(selection) {
+	    var data = context.photos().dateFilters();
+
+	    function filterEnabled(d) {
+	      return context.photos().dateFilterValue(d);
 	    }
+
+	    var ul = selection.selectAll('.layer-list-date-filter').data([0]);
+	    ul.exit().remove();
+	    ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-date-filter').merge(ul);
+	    var li = ul.selectAll('.list-item-date-filter').data(context.photos().shouldFilterByDate() ? data : []);
+	    li.exit().remove();
+	    var liEnter = li.enter().append('li').attr('class', 'list-item-date-filter');
+	    var labelEnter = liEnter.append('label').each(function (d) {
+	      select(this).call(uiTooltip().title(_t.html('photo_overlays.date_filter.' + d + '.tooltip')).placement('top'));
+	    });
+	    labelEnter.append('span').html(function (d) {
+	      return _t.html('photo_overlays.date_filter.' + d + '.title');
+	    });
+	    labelEnter.append('input').attr('type', 'date').attr('class', 'list-item-input').attr('placeholder', _t('units.year_month_day')).call(utilNoAuto).each(function (d) {
+	      utilGetSetValue(select(this), context.photos().dateFilterValue(d) || '');
+	    }).on('change', function (d3_event, d) {
+	      var value = utilGetSetValue(select(this)).trim();
+	      context.photos().setDateFilter(d, value, true); // reload the displayed dates
+
+	      li.selectAll('input').each(function (d) {
+	        utilGetSetValue(select(this), context.photos().dateFilterValue(d) || '');
+	      });
+	    });
+	    li = li.merge(liEnter).classed('active', filterEnabled);
 	  }
-	};
-	RayCrossingCounter.prototype.isPointInPolygon = function isPointInPolygon () {
-	  return this.getLocation() !== Location.EXTERIOR
-	};
-	RayCrossingCounter.prototype.getLocation = function getLocation () {
-	  if (this._isPointOnSegment) { return Location.BOUNDARY }
-	  if (this._crossingCount % 2 === 1) {
-	    return Location.INTERIOR
-	  }
-	  return Location.EXTERIOR
-	};
-	RayCrossingCounter.prototype.isOnSegment = function isOnSegment () {
-	  return this._isPointOnSegment
-	};
-	RayCrossingCounter.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	RayCrossingCounter.prototype.getClass = function getClass () {
-	  return RayCrossingCounter
-	};
-	RayCrossingCounter.locatePointInRing = function locatePointInRing () {
-	  if (arguments[0] instanceof Coordinate && hasInterface(arguments[1], CoordinateSequence)) {
-	    var p = arguments[0];
-	    var ring = arguments[1];
-	    var counter = new RayCrossingCounter(p);
-	    var p1 = new Coordinate();
-	    var p2 = new Coordinate();
-	    for (var i = 1; i < ring.size(); i++) {
-	      ring.getCoordinate(i, p1);
-	      ring.getCoordinate(i - 1, p2);
-	      counter.countSegment(p1, p2);
-	      if (counter.isOnSegment()) { return counter.getLocation() }
-	    }
-	    return counter.getLocation()
-	  } else if (arguments[0] instanceof Coordinate && arguments[1] instanceof Array) {
-	    var p$1 = arguments[0];
-	    var ring$1 = arguments[1];
-	    var counter$1 = new RayCrossingCounter(p$1);
-	    for (var i$1 = 1; i$1 < ring$1.length; i$1++) {
-	      var p1$1 = ring$1[i$1];
-	      var p2$1 = ring$1[i$1 - 1];
-	      counter$1.countSegment(p1$1, p2$1);
-	      if (counter$1.isOnSegment()) { return counter$1.getLocation() }
-	    }
-	    return counter$1.getLocation()
-	  }
-	};
 
-	var CGAlgorithms = function CGAlgorithms () {};
+	  function drawUsernameFilter(selection) {
+	    function filterEnabled() {
+	      return context.photos().usernames();
+	    }
 
-	var staticAccessors$3 = { CLOCKWISE: { configurable: true },RIGHT: { configurable: true },COUNTERCLOCKWISE: { configurable: true },LEFT: { configurable: true },COLLINEAR: { configurable: true },STRAIGHT: { configurable: true } };
+	    var ul = selection.selectAll('.layer-list-username-filter').data([0]);
+	    ul.exit().remove();
+	    ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-username-filter').merge(ul);
+	    var li = ul.selectAll('.list-item-username-filter').data(context.photos().shouldFilterByUsername() ? ['username-filter'] : []);
+	    li.exit().remove();
+	    var liEnter = li.enter().append('li').attr('class', 'list-item-username-filter');
+	    var labelEnter = liEnter.append('label').each(function () {
+	      select(this).call(uiTooltip().title(_t.html('photo_overlays.username_filter.tooltip')).placement('top'));
+	    });
+	    labelEnter.append('span').html(_t.html('photo_overlays.username_filter.title'));
+	    labelEnter.append('input').attr('type', 'text').attr('class', 'list-item-input').call(utilNoAuto).property('value', usernameValue).on('change', function () {
+	      var value = select(this).property('value');
+	      context.photos().setUsernameFilter(value, true);
+	      select(this).property('value', usernameValue);
+	    });
+	    li.merge(liEnter).classed('active', filterEnabled);
 
-	CGAlgorithms.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CGAlgorithms.prototype.getClass = function getClass () {
-	  return CGAlgorithms
-	};
-	CGAlgorithms.orientationIndex = function orientationIndex (p1, p2, q) {
-	  return CGAlgorithmsDD.orientationIndex(p1, p2, q)
-	};
-	CGAlgorithms.signedArea = function signedArea () {
-	  if (arguments[0] instanceof Array) {
-	    var ring = arguments[0];
-	    if (ring.length < 3) { return 0.0 }
-	    var sum = 0.0;
-	    var x0 = ring[0].x;
-	    for (var i = 1; i < ring.length - 1; i++) {
-	      var x = ring[i].x - x0;
-	      var y1 = ring[i + 1].y;
-	      var y2 = ring[i - 1].y;
-	      sum += x * (y2 - y1);
-	    }
-	    return sum / 2.0
-	  } else if (hasInterface(arguments[0], CoordinateSequence)) {
-	    var ring$1 = arguments[0];
-	    var n = ring$1.size();
-	    if (n < 3) { return 0.0 }
-	    var p0 = new Coordinate();
-	    var p1 = new Coordinate();
-	    var p2 = new Coordinate();
-	    ring$1.getCoordinate(0, p1);
-	    ring$1.getCoordinate(1, p2);
-	    var x0$1 = p1.x;
-	    p2.x -= x0$1;
-	    var sum$1 = 0.0;
-	    for (var i$1 = 1; i$1 < n - 1; i$1++) {
-	      p0.y = p1.y;
-	      p1.x = p2.x;
-	      p1.y = p2.y;
-	      ring$1.getCoordinate(i$1 + 1, p2);
-	      p2.x -= x0$1;
-	      sum$1 += p1.x * (p0.y - p2.y);
-	    }
-	    return sum$1 / 2.0
-	  }
-	};
-	CGAlgorithms.distanceLineLine = function distanceLineLine (A, B, C, D) {
-	  if (A.equals(B)) { return CGAlgorithms.distancePointLine(A, C, D) }
-	  if (C.equals(D)) { return CGAlgorithms.distancePointLine(D, A, B) }
-	  var noIntersection = false;
-	  if (!Envelope.intersects(A, B, C, D)) {
-	    noIntersection = true;
-	  } else {
-	    var denom = (B.x - A.x) * (D.y - C.y) - (B.y - A.y) * (D.x - C.x);
-	    if (denom === 0) {
-	      noIntersection = true;
-	    } else {
-	      var rNumb = (A.y - C.y) * (D.x - C.x) - (A.x - C.x) * (D.y - C.y);
-	      var sNum = (A.y - C.y) * (B.x - A.x) - (A.x - C.x) * (B.y - A.y);
-	      var s = sNum / denom;
-	      var r = rNumb / denom;
-	      if (r < 0 || r > 1 || s < 0 || s > 1) {
-	        noIntersection = true;
-	      }
+	    function usernameValue() {
+	      var usernames = context.photos().usernames();
+	      if (usernames) return usernames.join('; ');
+	      return usernames;
 	    }
 	  }
-	  if (noIntersection) {
-	    return MathUtil.min(CGAlgorithms.distancePointLine(A, C, D), CGAlgorithms.distancePointLine(B, C, D), CGAlgorithms.distancePointLine(C, A, B), CGAlgorithms.distancePointLine(D, A, B))
-	  }
-	  return 0.0
-	};
-	CGAlgorithms.isPointInRing = function isPointInRing (p, ring) {
-	  return CGAlgorithms.locatePointInRing(p, ring) !== Location.EXTERIOR
-	};
-	CGAlgorithms.computeLength = function computeLength (pts) {
-	  var n = pts.size();
-	  if (n <= 1) { return 0.0 }
-	  var len = 0.0;
-	  var p = new Coordinate();
-	  pts.getCoordinate(0, p);
-	  var x0 = p.x;
-	  var y0 = p.y;
-	  for (var i = 1; i < n; i++) {
-	    pts.getCoordinate(i, p);
-	    var x1 = p.x;
-	    var y1 = p.y;
-	    var dx = x1 - x0;
-	    var dy = y1 - y0;
-	    len += Math.sqrt(dx * dx + dy * dy);
-	    x0 = x1;
-	    y0 = y1;
-	  }
-	  return len
-	};
-	CGAlgorithms.isCCW = function isCCW (ring) {
-	  var nPts = ring.length - 1;
-	  if (nPts < 3) { throw new IllegalArgumentException('Ring has fewer than 4 points, so orientation cannot be determined') }
-	  var hiPt = ring[0];
-	  var hiIndex = 0;
-	  for (var i = 1; i <= nPts; i++) {
-	    var p = ring[i];
-	    if (p.y > hiPt.y) {
-	      hiPt = p;
-	      hiIndex = i;
-	    }
-	  }
-	  var iPrev = hiIndex;
-	  do {
-	    iPrev = iPrev - 1;
-	    if (iPrev < 0) { iPrev = nPts; }
-	  } while (ring[iPrev].equals2D(hiPt) && iPrev !== hiIndex)
-	  var iNext = hiIndex;
-	  do {
-	    iNext = (iNext + 1) % nPts;
-	  } while (ring[iNext].equals2D(hiPt) && iNext !== hiIndex)
-	  var prev = ring[iPrev];
-	  var next = ring[iNext];
-	  if (prev.equals2D(hiPt) || next.equals2D(hiPt) || prev.equals2D(next)) { return false }
-	  var disc = CGAlgorithms.computeOrientation(prev, hiPt, next);
-	  var isCCW = false;
-	  if (disc === 0) {
-	    isCCW = prev.x > next.x;
-	  } else {
-	    isCCW = disc > 0;
+
+	  function toggleLayer(which) {
+	    setLayer(which, !showsLayer(which));
 	  }
-	  return isCCW
-	};
-	CGAlgorithms.locatePointInRing = function locatePointInRing (p, ring) {
-	  return RayCrossingCounter.locatePointInRing(p, ring)
-	};
-	CGAlgorithms.distancePointLinePerpendicular = function distancePointLinePerpendicular (p, A, B) {
-	  var len2 = (B.x - A.x) * (B.x - A.x) + (B.y - A.y) * (B.y - A.y);
-	  var s = ((A.y - p.y) * (B.x - A.x) - (A.x - p.x) * (B.y - A.y)) / len2;
-	  return Math.abs(s) * Math.sqrt(len2)
-	};
-	CGAlgorithms.computeOrientation = function computeOrientation (p1, p2, q) {
-	  return CGAlgorithms.orientationIndex(p1, p2, q)
-	};
-	CGAlgorithms.distancePointLine = function distancePointLine () {
-	  if (arguments.length === 2) {
-	    var p = arguments[0];
-	    var line = arguments[1];
-	    if (line.length === 0) { throw new IllegalArgumentException('Line array must contain at least one vertex') }
-	    var minDistance = p.distance(line[0]);
-	    for (var i = 0; i < line.length - 1; i++) {
-	      var dist = CGAlgorithms.distancePointLine(p, line[i], line[i + 1]);
-	      if (dist < minDistance) {
-	        minDistance = dist;
-	      }
-	    }
-	    return minDistance
-	  } else if (arguments.length === 3) {
-	    var p$1 = arguments[0];
-	    var A = arguments[1];
-	    var B = arguments[2];
-	    if (A.x === B.x && A.y === B.y) { return p$1.distance(A) }
-	    var len2 = (B.x - A.x) * (B.x - A.x) + (B.y - A.y) * (B.y - A.y);
-	    var r = ((p$1.x - A.x) * (B.x - A.x) + (p$1.y - A.y) * (B.y - A.y)) / len2;
-	    if (r <= 0.0) { return p$1.distance(A) }
-	    if (r >= 1.0) { return p$1.distance(B) }
-	    var s = ((A.y - p$1.y) * (B.x - A.x) - (A.x - p$1.x) * (B.y - A.y)) / len2;
-	    return Math.abs(s) * Math.sqrt(len2)
+
+	  function showsLayer(which) {
+	    var layer = layers.layer(which);
+
+	    if (layer) {
+	      return layer.enabled();
+	    }
+
+	    return false;
 	  }
-	};
-	CGAlgorithms.isOnLine = function isOnLine (p, pt) {
-	  var lineIntersector = new RobustLineIntersector();
-	  for (var i = 1; i < pt.length; i++) {
-	    var p0 = pt[i - 1];
-	    var p1 = pt[i];
-	    lineIntersector.computeIntersection(p, p0, p1);
-	    if (lineIntersector.hasIntersection()) {
-	      return true
+
+	  function setLayer(which, enabled) {
+	    var layer = layers.layer(which);
+
+	    if (layer) {
+	      layer.enabled(enabled);
 	    }
 	  }
-	  return false
-	};
-	staticAccessors$3.CLOCKWISE.get = function () { return -1 };
-	staticAccessors$3.RIGHT.get = function () { return CGAlgorithms.CLOCKWISE };
-	staticAccessors$3.COUNTERCLOCKWISE.get = function () { return 1 };
-	staticAccessors$3.LEFT.get = function () { return CGAlgorithms.COUNTERCLOCKWISE };
-	staticAccessors$3.COLLINEAR.get = function () { return 0 };
-	staticAccessors$3.STRAIGHT.get = function () { return CGAlgorithms.COLLINEAR };
 
-	Object.defineProperties( CGAlgorithms, staticAccessors$3 );
+	  context.layers().on('change.uiSectionPhotoOverlays', section.reRender);
+	  context.photos().on('change.uiSectionPhotoOverlays', section.reRender);
+	  return section;
+	}
 
-	var GeometryComponentFilter = function GeometryComponentFilter () {};
+	function uiPaneMapData(context) {
+	  var mapDataPane = uiPane('map-data', context).key(_t('map_data.key')).label(_t.html('map_data.title')).description(_t.html('map_data.description')).iconName('iD-icon-data').sections([uiSectionDataLayers(context), uiSectionPhotoOverlays(context), uiSectionMapStyleOptions(context), uiSectionMapFeatures(context)]);
+	  return mapDataPane;
+	}
 
-	GeometryComponentFilter.prototype.filter = function filter (geom) {};
-	GeometryComponentFilter.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryComponentFilter.prototype.getClass = function getClass () {
-	  return GeometryComponentFilter
-	};
+	function uiSectionPrivacy(context) {
+	  var section = uiSection('preferences-third-party', context).label(_t.html('preferences.privacy.title')).disclosureContent(renderDisclosureContent);
 
-	var Geometry = function Geometry () {
-	  var factory = arguments[0];
+	  var _showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
 
-	  this._envelope = null;
-	  this._factory = null;
-	  this._SRID = null;
-	  this._userData = null;
-	  this._factory = factory;
-	  this._SRID = factory.getSRID();
-	};
+	  function renderDisclosureContent(selection) {
+	    // enter
+	    var privacyOptionsListEnter = selection.selectAll('.privacy-options-list').data([0]).enter().append('ul').attr('class', 'layer-list privacy-options-list');
+	    var thirdPartyIconsEnter = privacyOptionsListEnter.append('li').attr('class', 'privacy-third-party-icons-item').append('label').call(uiTooltip().title(_t.html('preferences.privacy.third_party_icons.tooltip')).placement('bottom'));
+	    thirdPartyIconsEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+	      d3_event.preventDefault();
+	      _showThirdPartyIcons = _showThirdPartyIcons === 'true' ? 'false' : 'true';
+	      corePreferences('preferences.privacy.thirdpartyicons', _showThirdPartyIcons);
+	      update();
+	    });
+	    thirdPartyIconsEnter.append('span').html(_t.html('preferences.privacy.third_party_icons.description')); // Privacy Policy link
 
-	var staticAccessors$11 = { serialVersionUID: { configurable: true },SORTINDEX_POINT: { configurable: true },SORTINDEX_MULTIPOINT: { configurable: true },SORTINDEX_LINESTRING: { configurable: true },SORTINDEX_LINEARRING: { configurable: true },SORTINDEX_MULTILINESTRING: { configurable: true },SORTINDEX_POLYGON: { configurable: true },SORTINDEX_MULTIPOLYGON: { configurable: true },SORTINDEX_GEOMETRYCOLLECTION: { configurable: true },geometryChangedFilter: { configurable: true } };
-	Geometry.prototype.isGeometryCollection = function isGeometryCollection () {
-	  return this.getSortIndex() === Geometry.SORTINDEX_GEOMETRYCOLLECTION
-	};
-	Geometry.prototype.getFactory = function getFactory () {
-	  return this._factory
-	};
-	Geometry.prototype.getGeometryN = function getGeometryN (n) {
-	  return this
-	};
-	Geometry.prototype.getArea = function getArea () {
-	  return 0.0
-	};
-	Geometry.prototype.isRectangle = function isRectangle () {
-	  return false
-	};
-	Geometry.prototype.equals = function equals () {
-	  if (arguments[0] instanceof Geometry) {
-	    var g$1 = arguments[0];
-	    if (g$1 === null) { return false }
-	    return this.equalsTopo(g$1)
-	  } else if (arguments[0] instanceof Object) {
-	    var o = arguments[0];
-	    if (!(o instanceof Geometry)) { return false }
-	    var g = o;
-	    return this.equalsExact(g)
-	  }
-	};
-	Geometry.prototype.equalsExact = function equalsExact (other) {
-	  return this === other || this.equalsExact(other, 0)
-	};
-	Geometry.prototype.geometryChanged = function geometryChanged () {
-	  this.apply(Geometry.geometryChangedFilter);
-	};
-	Geometry.prototype.geometryChangedAction = function geometryChangedAction () {
-	  this._envelope = null;
-	};
-	Geometry.prototype.equalsNorm = function equalsNorm (g) {
-	  if (g === null) { return false }
-	  return this.norm().equalsExact(g.norm())
-	};
-	Geometry.prototype.getLength = function getLength () {
-	  return 0.0
-	};
-	Geometry.prototype.getNumGeometries = function getNumGeometries () {
-	  return 1
-	};
-	Geometry.prototype.compareTo = function compareTo () {
-	  if (arguments.length === 1) {
-	    var o = arguments[0];
-	    var other = o;
-	    if (this.getSortIndex() !== other.getSortIndex()) {
-	      return this.getSortIndex() - other.getSortIndex()
-	    }
-	    if (this.isEmpty() && other.isEmpty()) {
-	      return 0
-	    }
-	    if (this.isEmpty()) {
-	      return -1
-	    }
-	    if (other.isEmpty()) {
-	      return 1
-	    }
-	    return this.compareToSameClass(o)
-	  } else if (arguments.length === 2) {
-	    var other$1 = arguments[0];
-	    var comp = arguments[1];
-	    if (this.getSortIndex() !== other$1.getSortIndex()) {
-	      return this.getSortIndex() - other$1.getSortIndex()
-	    }
-	    if (this.isEmpty() && other$1.isEmpty()) {
-	      return 0
-	    }
-	    if (this.isEmpty()) {
-	      return -1
-	    }
-	    if (other$1.isEmpty()) {
-	      return 1
+	    selection.selectAll('.privacy-link').data([0]).enter().append('div').attr('class', 'privacy-link').append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/openstreetmap/iD/blob/release/PRIVACY.md').append('span').html(_t.html('preferences.privacy.privacy_link'));
+	    update();
+
+	    function update() {
+	      selection.selectAll('.privacy-third-party-icons-item').classed('active', _showThirdPartyIcons === 'true').select('input').property('checked', _showThirdPartyIcons === 'true');
 	    }
-	    return this.compareToSameClass(other$1, comp)
-	  }
-	};
-	Geometry.prototype.getUserData = function getUserData () {
-	  return this._userData
-	};
-	Geometry.prototype.getSRID = function getSRID () {
-	  return this._SRID
-	};
-	Geometry.prototype.getEnvelope = function getEnvelope () {
-	  return this.getFactory().toGeometry(this.getEnvelopeInternal())
-	};
-	Geometry.prototype.checkNotGeometryCollection = function checkNotGeometryCollection (g) {
-	  if (g.getSortIndex() === Geometry.SORTINDEX_GEOMETRYCOLLECTION) {
-	    throw new IllegalArgumentException('This method does not support GeometryCollection arguments')
 	  }
-	};
-	Geometry.prototype.equal = function equal (a, b, tolerance) {
-	  if (tolerance === 0) {
-	    return a.equals(b)
-	  }
-	  return a.distance(b) <= tolerance
-	};
-	Geometry.prototype.norm = function norm () {
-	  var copy = this.copy();
-	  copy.normalize();
-	  return copy
-	};
-	Geometry.prototype.getPrecisionModel = function getPrecisionModel () {
-	  return this._factory.getPrecisionModel()
-	};
-	Geometry.prototype.getEnvelopeInternal = function getEnvelopeInternal () {
-	  if (this._envelope === null) {
-	    this._envelope = this.computeEnvelopeInternal();
-	  }
-	  return new Envelope(this._envelope)
-	};
-	Geometry.prototype.setSRID = function setSRID (SRID) {
-	  this._SRID = SRID;
-	};
-	Geometry.prototype.setUserData = function setUserData (userData) {
-	  this._userData = userData;
-	};
-	Geometry.prototype.compare = function compare (a, b) {
-	  var i = a.iterator();
-	  var j = b.iterator();
-	  while (i.hasNext() && j.hasNext()) {
-	    var aElement = i.next();
-	    var bElement = j.next();
-	    var comparison = aElement.compareTo(bElement);
-	    if (comparison !== 0) {
-	      return comparison
+
+	  return section;
+	}
+
+	function uiPanePreferences(context) {
+	  var preferencesPane = uiPane('preferences', context).key(_t('preferences.key')).label(_t.html('preferences.title')).description(_t.html('preferences.description')).iconName('fas-user-cog').sections([uiSectionPrivacy(context)]);
+	  return preferencesPane;
+	}
+
+	function uiInit(context) {
+	  var _initCounter = 0;
+	  var _needWidth = {};
+
+	  var _lastPointerType;
+
+	  function render(container) {
+	    container.on('click.ui', function (d3_event) {
+	      // we're only concerned with the primary mouse button
+	      if (d3_event.button !== 0) return;
+	      if (!d3_event.composedPath) return; // some targets have default click events we don't want to override
+
+	      var isOkayTarget = d3_event.composedPath().some(function (node) {
+	        // we only care about element nodes
+	        return node.nodeType === 1 && ( // clicking <input> focuses it and/or changes a value
+	        node.nodeName === 'INPUT' || // clicking <label> affects its <input> by default
+	        node.nodeName === 'LABEL' || // clicking <a> opens a hyperlink by default
+	        node.nodeName === 'A');
+	      });
+	      if (isOkayTarget) return; // disable double-tap-to-zoom on touchscreens
+
+	      d3_event.preventDefault();
+	    });
+	    var detected = utilDetect(); // only WebKit supports gesture events
+
+	    if ('GestureEvent' in window && // Listening for gesture events on iOS 13.4+ breaks double-tapping,
+	    // but we only need to do this on desktop Safari anyway. – #7694
+	    !detected.isMobileWebKit) {
+	      // On iOS we disable pinch-to-zoom of the UI via the `touch-action`
+	      // CSS property, but on desktop Safari we need to manually cancel the
+	      // default gesture events.
+	      container.on('gesturestart.ui gesturechange.ui gestureend.ui', function (d3_event) {
+	        // disable pinch-to-zoom of the UI via multitouch trackpads on macOS Safari
+	        d3_event.preventDefault();
+	      });
 	    }
-	  }
-	  if (i.hasNext()) {
-	    return 1
-	  }
-	  if (j.hasNext()) {
-	    return -1
-	  }
-	  return 0
-	};
-	Geometry.prototype.hashCode = function hashCode () {
-	  return this.getEnvelopeInternal().hashCode()
-	};
-	Geometry.prototype.isGeometryCollectionOrDerived = function isGeometryCollectionOrDerived () {
-	  if (this.getSortIndex() === Geometry.SORTINDEX_GEOMETRYCOLLECTION || this.getSortIndex() === Geometry.SORTINDEX_MULTIPOINT || this.getSortIndex() === Geometry.SORTINDEX_MULTILINESTRING || this.getSortIndex() === Geometry.SORTINDEX_MULTIPOLYGON) {
-	    return true
-	  }
-	  return false
-	};
-	Geometry.prototype.interfaces_ = function interfaces_ () {
-	  return [Clonable, Comparable, Serializable]
-	};
-	Geometry.prototype.getClass = function getClass () {
-	  return Geometry
-	};
-	Geometry.hasNonEmptyElements = function hasNonEmptyElements (geometries) {
-	  for (var i = 0; i < geometries.length; i++) {
-	    if (!geometries[i].isEmpty()) {
-	      return true
+
+	    if ('PointerEvent' in window) {
+	      select(window).on('pointerdown.ui pointerup.ui', function (d3_event) {
+	        var pointerType = d3_event.pointerType || 'mouse';
+
+	        if (_lastPointerType !== pointerType) {
+	          _lastPointerType = pointerType;
+	          container.attr('pointer', pointerType);
+	        }
+	      }, true);
+	    } else {
+	      _lastPointerType = 'mouse';
+	      container.attr('pointer', 'mouse');
 	    }
-	  }
-	  return false
-	};
-	Geometry.hasNullElements = function hasNullElements (array) {
-	  for (var i = 0; i < array.length; i++) {
-	    if (array[i] === null) {
-	      return true
+
+	    container.attr('lang', _mainLocalizer.localeCode()).attr('dir', _mainLocalizer.textDirection()); // setup fullscreen keybindings (no button shown at this time)
+
+	    container.call(uiFullScreen(context));
+	    var map = context.map();
+	    map.redrawEnable(false); // don't draw until we've set zoom/lat/long
+
+	    map.on('hitMinZoom.ui', function () {
+	      ui.flash.iconName('#iD-icon-no').label(_t.html('cannot_zoom'))();
+	    });
+	    container.append('svg').attr('id', 'ideditor-defs').call(ui.svgDefs);
+	    container.append('div').attr('class', 'sidebar').call(ui.sidebar);
+	    var content = container.append('div').attr('class', 'main-content active'); // Top toolbar
+
+	    content.append('div').attr('class', 'top-toolbar-wrap').append('div').attr('class', 'top-toolbar fillD').call(uiTopToolbar(context));
+	    content.append('div').attr('class', 'main-map').attr('dir', 'ltr').call(map);
+	    var overMap = content.append('div').attr('class', 'over-map'); // HACK: Mobile Safari 14 likes to select anything selectable when long-
+	    // pressing, even if it's not targeted. This conflicts with long-pressing
+	    // to show the edit menu. We add a selectable offscreen element as the first
+	    // child to trick Safari into not showing the selection UI.
+
+	    overMap.append('div').attr('class', 'select-trap').text('t');
+	    overMap.call(uiMapInMap(context)).call(uiNotice(context));
+	    overMap.append('div').attr('class', 'spinner').call(uiSpinner(context)); // Map controls
+
+	    var controls = overMap.append('div').attr('class', 'map-controls');
+	    controls.append('div').attr('class', 'map-control zoombuttons').call(uiZoom(context));
+	    controls.append('div').attr('class', 'map-control zoom-to-selection-control').call(uiZoomToSelection(context));
+	    controls.append('div').attr('class', 'map-control geolocate-control').call(uiGeolocate(context));
+	    controls.on('wheel.mapControls', function (d3_event) {
+	      if (!d3_event.deltaX) {
+	        controls.node().scrollTop += d3_event.deltaY;
+	      }
+	    }); // Add panes
+	    // This should happen after map is initialized, as some require surface()
+
+	    var panes = overMap.append('div').attr('class', 'map-panes');
+	    var uiPanes = [uiPaneBackground(context), uiPaneMapData(context), uiPaneIssues(context), uiPanePreferences(context), uiPaneHelp(context)];
+	    uiPanes.forEach(function (pane) {
+	      controls.append('div').attr('class', 'map-control map-pane-control ' + pane.id + '-control').call(pane.renderToggleButton);
+	      panes.call(pane.renderPane);
+	    });
+	    ui.info = uiInfo(context);
+	    overMap.call(ui.info);
+	    overMap.append('div').attr('class', 'photoviewer').classed('al', true) // 'al'=left,  'ar'=right
+	    .classed('hide', true).call(ui.photoviewer);
+	    overMap.append('div').attr('class', 'attribution-wrap').attr('dir', 'ltr').call(uiAttribution(context)); // Add footer
+
+	    var about = content.append('div').attr('class', 'map-footer');
+	    about.append('div').attr('class', 'api-status').call(uiStatus(context));
+	    var footer = about.append('div').attr('class', 'map-footer-bar fillD');
+	    footer.append('div').attr('class', 'flash-wrap footer-hide');
+	    var footerWrap = footer.append('div').attr('class', 'main-footer-wrap footer-show');
+	    footerWrap.append('div').attr('class', 'scale-block').call(uiScale(context));
+	    var aboutList = footerWrap.append('div').attr('class', 'info-block').append('ul').attr('class', 'map-footer-list');
+	    aboutList.append('li').attr('class', 'user-list').call(uiContributors(context));
+	    var apiConnections = context.apiConnections();
+
+	    if (apiConnections && apiConnections.length > 1) {
+	      aboutList.append('li').attr('class', 'source-switch').call(uiSourceSwitch(context).keys(apiConnections));
 	    }
-	  }
-	  return false
-	};
-	staticAccessors$11.serialVersionUID.get = function () { return 8763622679187376702 };
-	staticAccessors$11.SORTINDEX_POINT.get = function () { return 0 };
-	staticAccessors$11.SORTINDEX_MULTIPOINT.get = function () { return 1 };
-	staticAccessors$11.SORTINDEX_LINESTRING.get = function () { return 2 };
-	staticAccessors$11.SORTINDEX_LINEARRING.get = function () { return 3 };
-	staticAccessors$11.SORTINDEX_MULTILINESTRING.get = function () { return 4 };
-	staticAccessors$11.SORTINDEX_POLYGON.get = function () { return 5 };
-	staticAccessors$11.SORTINDEX_MULTIPOLYGON.get = function () { return 6 };
-	staticAccessors$11.SORTINDEX_GEOMETRYCOLLECTION.get = function () { return 7 };
-	staticAccessors$11.geometryChangedFilter.get = function () { return geometryChangedFilter };
-
-	Object.defineProperties( Geometry, staticAccessors$11 );
-
-	var geometryChangedFilter = function geometryChangedFilter () {};
-
-	geometryChangedFilter.interfaces_ = function interfaces_ () {
-	  return [GeometryComponentFilter]
-	};
-	geometryChangedFilter.filter = function filter (geom) {
-	  geom.geometryChangedAction();
-	};
 
-	var CoordinateFilter = function CoordinateFilter () {};
+	    aboutList.append('li').attr('class', 'issues-info').call(uiIssuesInfo(context));
+	    aboutList.append('li').attr('class', 'feature-warning').call(uiFeatureInfo(context));
+	    var issueLinks = aboutList.append('li');
+	    issueLinks.append('a').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD/issues').call(svgIcon('#iD-icon-bug', 'light')).call(uiTooltip().title(_t.html('report_a_bug')).placement('top'));
+	    issueLinks.append('a').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD/blob/develop/CONTRIBUTING.md#translating').call(svgIcon('#iD-icon-translate', 'light')).call(uiTooltip().title(_t.html('help_translate')).placement('top'));
+	    aboutList.append('li').attr('class', 'version').call(uiVersion(context));
 
-	CoordinateFilter.prototype.filter = function filter (coord) {};
-	CoordinateFilter.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CoordinateFilter.prototype.getClass = function getClass () {
-	  return CoordinateFilter
-	};
+	    if (!context.embed()) {
+	      aboutList.call(uiAccount(context));
+	    } // Setup map dimensions and move map to initial center/zoom.
+	    // This should happen after .main-content and toolbars exist.
 
-	var BoundaryNodeRule = function BoundaryNodeRule () {};
 
-	var staticAccessors$12 = { Mod2BoundaryNodeRule: { configurable: true },EndPointBoundaryNodeRule: { configurable: true },MultiValentEndPointBoundaryNodeRule: { configurable: true },MonoValentEndPointBoundaryNodeRule: { configurable: true },MOD2_BOUNDARY_RULE: { configurable: true },ENDPOINT_BOUNDARY_RULE: { configurable: true },MULTIVALENT_ENDPOINT_BOUNDARY_RULE: { configurable: true },MONOVALENT_ENDPOINT_BOUNDARY_RULE: { configurable: true },OGC_SFS_BOUNDARY_RULE: { configurable: true } };
+	    ui.onResize();
+	    map.redrawEnable(true);
+	    ui.hash = behaviorHash(context);
+	    ui.hash();
 
-	BoundaryNodeRule.prototype.isInBoundary = function isInBoundary (boundaryCount) {};
-	BoundaryNodeRule.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BoundaryNodeRule.prototype.getClass = function getClass () {
-	  return BoundaryNodeRule
-	};
-	staticAccessors$12.Mod2BoundaryNodeRule.get = function () { return Mod2BoundaryNodeRule };
-	staticAccessors$12.EndPointBoundaryNodeRule.get = function () { return EndPointBoundaryNodeRule };
-	staticAccessors$12.MultiValentEndPointBoundaryNodeRule.get = function () { return MultiValentEndPointBoundaryNodeRule };
-	staticAccessors$12.MonoValentEndPointBoundaryNodeRule.get = function () { return MonoValentEndPointBoundaryNodeRule };
-	staticAccessors$12.MOD2_BOUNDARY_RULE.get = function () { return new Mod2BoundaryNodeRule() };
-	staticAccessors$12.ENDPOINT_BOUNDARY_RULE.get = function () { return new EndPointBoundaryNodeRule() };
-	staticAccessors$12.MULTIVALENT_ENDPOINT_BOUNDARY_RULE.get = function () { return new MultiValentEndPointBoundaryNodeRule() };
-	staticAccessors$12.MONOVALENT_ENDPOINT_BOUNDARY_RULE.get = function () { return new MonoValentEndPointBoundaryNodeRule() };
-	staticAccessors$12.OGC_SFS_BOUNDARY_RULE.get = function () { return BoundaryNodeRule.MOD2_BOUNDARY_RULE };
-
-	Object.defineProperties( BoundaryNodeRule, staticAccessors$12 );
-
-	var Mod2BoundaryNodeRule = function Mod2BoundaryNodeRule () {};
-
-	Mod2BoundaryNodeRule.prototype.isInBoundary = function isInBoundary (boundaryCount) {
-	  return boundaryCount % 2 === 1
-	};
-	Mod2BoundaryNodeRule.prototype.interfaces_ = function interfaces_ () {
-	  return [BoundaryNodeRule]
-	};
-	Mod2BoundaryNodeRule.prototype.getClass = function getClass () {
-	  return Mod2BoundaryNodeRule
-	};
+	    if (!ui.hash.hadHash) {
+	      map.centerZoom([0, 0], 2);
+	    } // Bind events
 
-	var EndPointBoundaryNodeRule = function EndPointBoundaryNodeRule () {};
 
-	EndPointBoundaryNodeRule.prototype.isInBoundary = function isInBoundary (boundaryCount) {
-	  return boundaryCount > 0
-	};
-	EndPointBoundaryNodeRule.prototype.interfaces_ = function interfaces_ () {
-	  return [BoundaryNodeRule]
-	};
-	EndPointBoundaryNodeRule.prototype.getClass = function getClass () {
-	  return EndPointBoundaryNodeRule
-	};
+	    window.onbeforeunload = function () {
+	      return context.save();
+	    };
 
-	var MultiValentEndPointBoundaryNodeRule = function MultiValentEndPointBoundaryNodeRule () {};
+	    window.onunload = function () {
+	      context.history().unlock();
+	    };
 
-	MultiValentEndPointBoundaryNodeRule.prototype.isInBoundary = function isInBoundary (boundaryCount) {
-	  return boundaryCount > 1
-	};
-	MultiValentEndPointBoundaryNodeRule.prototype.interfaces_ = function interfaces_ () {
-	  return [BoundaryNodeRule]
-	};
-	MultiValentEndPointBoundaryNodeRule.prototype.getClass = function getClass () {
-	  return MultiValentEndPointBoundaryNodeRule
-	};
+	    select(window).on('resize.editor', function () {
+	      ui.onResize();
+	    });
+	    var panPixels = 80;
+	    context.keybinding().on('⌫', function (d3_event) {
+	      d3_event.preventDefault();
+	    }).on([_t('sidebar.key'), '`', '²', '@'], ui.sidebar.toggle) // #5663, #6864 - common QWERTY, AZERTY
+	    .on('←', pan([panPixels, 0])).on('↑', pan([0, panPixels])).on('→', pan([-panPixels, 0])).on('↓', pan([0, -panPixels])).on(uiCmd('⌥←'), pan([map.dimensions()[0], 0])).on(uiCmd('⌥↑'), pan([0, map.dimensions()[1]])).on(uiCmd('⌥→'), pan([-map.dimensions()[0], 0])).on(uiCmd('⌥↓'), pan([0, -map.dimensions()[1]])).on(uiCmd('⌘' + _t('background.key')), function quickSwitch(d3_event) {
+	      if (d3_event) {
+	        d3_event.stopImmediatePropagation();
+	        d3_event.preventDefault();
+	      }
 
-	var MonoValentEndPointBoundaryNodeRule = function MonoValentEndPointBoundaryNodeRule () {};
+	      var previousBackground = context.background().findSource(corePreferences('background-last-used-toggle'));
 
-	MonoValentEndPointBoundaryNodeRule.prototype.isInBoundary = function isInBoundary (boundaryCount) {
-	  return boundaryCount === 1
-	};
-	MonoValentEndPointBoundaryNodeRule.prototype.interfaces_ = function interfaces_ () {
-	  return [BoundaryNodeRule]
-	};
-	MonoValentEndPointBoundaryNodeRule.prototype.getClass = function getClass () {
-	  return MonoValentEndPointBoundaryNodeRule
-	};
+	      if (previousBackground) {
+	        var currentBackground = context.background().baseLayerSource();
+	        corePreferences('background-last-used-toggle', currentBackground.id);
+	        corePreferences('background-last-used', previousBackground.id);
+	        context.background().baseLayerSource(previousBackground);
+	      }
+	    }).on(_t('area_fill.wireframe.key'), function toggleWireframe(d3_event) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation();
+	      context.map().toggleWireframe();
+	    }).on(uiCmd('⌥' + _t('area_fill.wireframe.key')), function toggleOsmData(d3_event) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation(); // Don't allow layer changes while drawing - #6584
 
-	// import Iterator from './Iterator'
+	      var mode = context.mode();
+	      if (mode && /^draw/.test(mode.id)) return;
+	      var layer = context.layers().layer('osm');
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/Collection.html
-	 *
-	 * @constructor
-	 * @private
-	 */
-	var Collection = function Collection () {};
+	      if (layer) {
+	        layer.enabled(!layer.enabled());
 
-	Collection.prototype.add = function add () {};
+	        if (!layer.enabled()) {
+	          context.enter(modeBrowse(context));
+	        }
+	      }
+	    }).on(_t('map_data.highlight_edits.key'), function toggleHighlightEdited(d3_event) {
+	      d3_event.preventDefault();
+	      context.map().toggleHighlightEdited();
+	    });
+	    context.on('enter.editor', function (entered) {
+	      container.classed('mode-' + entered.id, true);
+	    }).on('exit.editor', function (exited) {
+	      container.classed('mode-' + exited.id, false);
+	    });
+	    context.enter(modeBrowse(context));
 
-	/**
-	 * Appends all of the elements in the specified collection to the end of this
-	 * list, in the order that they are returned by the specified collection's
-	 * iterator (optional operation).
-	 * @param {javascript.util.Collection} c
-	 * @return {boolean}
-	 */
-	Collection.prototype.addAll = function addAll () {};
+	    if (!_initCounter++) {
+	      if (!ui.hash.startWalkthrough) {
+	        context.container().call(uiSplash(context)).call(uiRestore(context));
+	      }
 
-	/**
-	 * Returns true if this collection contains no elements.
-	 * @return {boolean}
-	 */
-	Collection.prototype.isEmpty = function isEmpty () {};
+	      context.container().call(ui.shortcuts);
+	    }
 
-	/**
-	 * Returns an iterator over the elements in this collection.
-	 * @return {javascript.util.Iterator}
-	 */
-	Collection.prototype.iterator = function iterator () {};
+	    var osm = context.connection();
+	    var auth = uiLoading(context).message(_t.html('loading_auth')).blocking(true);
 
-	/**
-	 * Returns an iterator over the elements in this collection.
-	 * @return {number}
-	 */
-	Collection.prototype.size = function size () {};
+	    if (osm && auth) {
+	      osm.on('authLoading.ui', function () {
+	        context.container().call(auth);
+	      }).on('authDone.ui', function () {
+	        auth.close();
+	      });
+	    }
 
-	/**
-	 * Returns an array containing all of the elements in this collection.
-	 * @return {Array}
-	 */
-	Collection.prototype.toArray = function toArray () {};
+	    _initCounter++;
 
-	/**
-	 * Removes a single instance of the specified element from this collection if it
-	 * is present. (optional)
-	 * @param {Object} e
-	 * @return {boolean}
-	 */
-	Collection.prototype.remove = function remove () {};
+	    if (ui.hash.startWalkthrough) {
+	      ui.hash.startWalkthrough = false;
+	      context.container().call(uiIntro(context));
+	    }
 
-	/**
-	 * @param {string=} message Optional message
-	 * @extends {Error}
-	 * @constructor
-	 * @private
-	 */
-	function IndexOutOfBoundsException (message) {
-	  this.message = message || '';
-	}
-	IndexOutOfBoundsException.prototype = new Error();
+	    function pan(d) {
+	      return function (d3_event) {
+	        if (d3_event.shiftKey) return;
+	        if (context.container().select('.combobox').size()) return;
+	        d3_event.preventDefault();
+	        context.map().pan(d, 100);
+	      };
+	    }
+	  }
 
-	/**
-	 * @type {string}
-	 */
-	IndexOutOfBoundsException.prototype.name = 'IndexOutOfBoundsException';
+	  var ui = {};
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/Iterator.html
-	 * @constructor
-	 * @private
-	 */
-	var Iterator$1 = function Iterator () {};
+	  var _loadPromise; // renders the iD interface into the container node
 
-	Iterator$1.prototype.hasNext = function hasNext () {};
 
-	/**
-	 * Returns the next element in the iteration.
-	 * @return {Object}
-	 */
-	Iterator$1.prototype.next = function next () {};
+	  ui.ensureLoaded = function () {
+	    if (_loadPromise) return _loadPromise;
+	    return _loadPromise = Promise.all([// must have strings and presets before loading the UI
+	    _mainLocalizer.ensureLoaded(), _mainPresetIndex.ensureLoaded()]).then(function () {
+	      if (!context.container().empty()) render(context.container());
+	    })["catch"](function (err) {
+	      return console.error(err);
+	    }); // eslint-disable-line
+	  }; // `ui.restart()` will destroy and rebuild the entire iD interface,
+	  // for example to switch the locale while iD is running.
 
-	/**
-	 * Removes from the underlying collection the last element returned by the
-	 * iterator (optional operation).
-	 */
-	Iterator$1.prototype.remove = function remove () {};
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/List.html
-	 *
-	 * @extends {javascript.util.Collection}
-	 * @constructor
-	 * @private
-	 */
-	var List = (function (Collection$$1) {
-	  function List () {
-	    Collection$$1.apply(this, arguments);
-	  }
+	  ui.restart = function () {
+	    context.keybinding().clear();
+	    _loadPromise = null;
+	    context.container().selectAll('*').remove();
+	    ui.ensureLoaded();
+	  };
 
-	  if ( Collection$$1 ) { List.__proto__ = Collection$$1; }
-	  List.prototype = Object.create( Collection$$1 && Collection$$1.prototype );
-	  List.prototype.constructor = List;
+	  ui.lastPointerType = function () {
+	    return _lastPointerType;
+	  };
 
-	  List.prototype.get = function get () { };
+	  ui.svgDefs = svgDefs(context);
+	  ui.flash = uiFlash(context);
+	  ui.sidebar = uiSidebar(context);
+	  ui.photoviewer = uiPhotoviewer(context);
+	  ui.shortcuts = uiShortcuts(context);
 
-	  /**
-	   * Replaces the element at the specified position in this list with the
-	   * specified element (optional operation).
-	   * @param {number} index
-	   * @param {Object} e
-	   * @return {Object}
-	   */
-	  List.prototype.set = function set () { };
+	  ui.onResize = function (withPan) {
+	    var map = context.map(); // Recalc dimensions of map and sidebar.. (`true` = force recalc)
+	    // This will call `getBoundingClientRect` and trigger reflow,
+	    //  but the values will be cached for later use.
 
-	  /**
-	   * Returns true if this collection contains no elements.
-	   * @return {boolean}
-	   */
-	  List.prototype.isEmpty = function isEmpty () { };
+	    var mapDimensions = utilGetDimensions(context.container().select('.main-content'), true);
+	    utilGetDimensions(context.container().select('.sidebar'), true);
 
-	  return List;
-	}(Collection));
+	    if (withPan !== undefined) {
+	      map.redrawEnable(false);
+	      map.pan(withPan);
+	      map.redrawEnable(true);
+	    }
 
-	/**
-	 * @param {string=} message Optional message
-	 * @extends {Error}
-	 * @constructor
-	 * @private
-	 */
-	function NoSuchElementException (message) {
-	  this.message = message || '';
-	}
-	NoSuchElementException.prototype = new Error();
+	    map.dimensions(mapDimensions);
+	    ui.photoviewer.onMapResize(); // check if header or footer have overflowed
 
-	/**
-	 * @type {string}
-	 */
-	NoSuchElementException.prototype.name = 'NoSuchElementException';
+	    ui.checkOverflow('.top-toolbar');
+	    ui.checkOverflow('.map-footer-bar'); // Use outdated code so it works on Explorer
 
-	// import OperationNotSupported from './OperationNotSupported'
+	    var resizeWindowEvent = document.createEvent('Event');
+	    resizeWindowEvent.initEvent('resizeWindow', true, true);
+	    document.dispatchEvent(resizeWindowEvent);
+	  }; // Call checkOverflow when resizing or whenever the contents change.
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/ArrayList.html
-	 *
-	 * @extends List
-	 * @private
-	 */
-	var ArrayList = (function (List$$1) {
-	  function ArrayList () {
-	    List$$1.call(this);
-	    this.array_ = [];
 
-	    if (arguments[0] instanceof Collection) {
-	      this.addAll(arguments[0]);
+	  ui.checkOverflow = function (selector, reset) {
+	    if (reset) {
+	      delete _needWidth[selector];
 	    }
-	  }
 
-	  if ( List$$1 ) { ArrayList.__proto__ = List$$1; }
-	  ArrayList.prototype = Object.create( List$$1 && List$$1.prototype );
-	  ArrayList.prototype.constructor = ArrayList;
+	    var selection = context.container().select(selector);
+	    if (selection.empty()) return;
+	    var scrollWidth = selection.property('scrollWidth');
+	    var clientWidth = selection.property('clientWidth');
+	    var needed = _needWidth[selector] || scrollWidth;
 
-	  ArrayList.prototype.ensureCapacity = function ensureCapacity () {};
-	  ArrayList.prototype.interfaces_ = function interfaces_ () { return [List$$1, Collection] };
+	    if (scrollWidth > clientWidth) {
+	      // overflow happening
+	      selection.classed('narrow', true);
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.add = function add (e) {
-	    if (arguments.length === 1) {
-	      this.array_.push(e);
-	    } else {
-	      this.array_.splice(arguments[0], arguments[1]);
+	      if (!_needWidth[selector]) {
+	        _needWidth[selector] = scrollWidth;
+	      }
+	    } else if (scrollWidth >= needed) {
+	      selection.classed('narrow', false);
 	    }
-	    return true
 	  };
 
-	  ArrayList.prototype.clear = function clear () {
-	    this.array_ = [];
-	  };
+	  ui.togglePanes = function (showPane) {
+	    var hidePanes = context.container().selectAll('.map-pane.shown');
+	    var side = _mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left';
+	    hidePanes.classed('shown', false).classed('hide', true);
+	    context.container().selectAll('.map-pane-control button').classed('active', false);
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.addAll = function addAll (c) {
-	    var this$1 = this;
+	    if (showPane) {
+	      hidePanes.classed('shown', false).classed('hide', true).style(side, '-500px');
+	      context.container().selectAll('.' + showPane.attr('pane') + '-control button').classed('active', true);
+	      showPane.classed('shown', true).classed('hide', false);
 
-	    for (var i = c.iterator(); i.hasNext();) {
-	      this$1.add(i.next());
+	      if (hidePanes.empty()) {
+	        showPane.style(side, '-500px').transition().duration(200).style(side, '0px');
+	      } else {
+	        showPane.style(side, '0px');
+	      }
+	    } else {
+	      hidePanes.classed('shown', true).classed('hide', false).style(side, '0px').transition().duration(200).style(side, '-500px').on('end', function () {
+	        select(this).classed('shown', false).classed('hide', true);
+	      });
 	    }
-	    return true
 	  };
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.set = function set (index, element) {
-	    var oldElement = this.array_[index];
-	    this.array_[index] = element;
-	    return oldElement
-	  };
+	  var _editMenu = uiEditMenu(context);
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.iterator = function iterator () {
-	    return new Iterator_(this)
+	  ui.editMenu = function () {
+	    return _editMenu;
 	  };
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.get = function get (index) {
-	    if (index < 0 || index >= this.size()) {
-	      throw new IndexOutOfBoundsException()
+	  ui.showEditMenu = function (anchorPoint, triggerType, operations) {
+	    // remove any displayed menu
+	    ui.closeEditMenu();
+	    if (!operations && context.mode().operations) operations = context.mode().operations();
+	    if (!operations || !operations.length) return; // disable menu if in wide selection, for example
+
+	    if (!context.map().editableDataEnabled()) return;
+	    var surfaceNode = context.surface().node();
+
+	    if (surfaceNode.focus) {
+	      // FF doesn't support it
+	      // focus the surface or else clicking off the menu may not trigger modeBrowse
+	      surfaceNode.focus();
 	    }
 
-	    return this.array_[index]
-	  };
+	    operations.forEach(function (operation) {
+	      if (operation.point) operation.point(anchorPoint);
+	    });
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.isEmpty = function isEmpty () {
-	    return this.array_.length === 0
+	    _editMenu.anchorLoc(anchorPoint).triggerType(triggerType).operations(operations); // render the menu
+
+
+	    context.map().supersurface.call(_editMenu);
 	  };
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.size = function size () {
-	    return this.array_.length
+	  ui.closeEditMenu = function () {
+	    // remove any existing menu no matter how it was added
+	    context.map().supersurface.select('.edit-menu').remove();
 	  };
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.toArray = function toArray () {
-	    var this$1 = this;
+	  var _saveLoading = select(null);
 
-	    var array = [];
+	  context.uploader().on('saveStarted.ui', function () {
+	    _saveLoading = uiLoading(context).message(_t.html('save.uploading')).blocking(true);
+	    context.container().call(_saveLoading); // block input during upload
+	  }).on('saveEnded.ui', function () {
+	    _saveLoading.close();
 
-	    for (var i = 0, len = this.array_.length; i < len; i++) {
-	      array.push(this$1.array_[i]);
-	    }
+	    _saveLoading = select(null);
+	  });
+	  return ui;
+	}
 
-	    return array
-	  };
+	function coreContext() {
+	  var _this = this;
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.remove = function remove (o) {
-	    var this$1 = this;
+	  var dispatch = dispatch$8('enter', 'exit', 'change');
+	  var context = utilRebind({}, dispatch, 'on');
 
-	    var found = false;
+	  var _deferred = new Set();
 
-	    for (var i = 0, len = this.array_.length; i < len; i++) {
-	      if (this$1.array_[i] === o) {
-	        this$1.array_.splice(i, 1);
-	        found = true;
-	        break
-	      }
-	    }
+	  context.version = '2.20.2';
+	  context.privacyVersion = '20201202'; // iD will alter the hash so cache the parameters intended to setup the session
+
+	  context.initialHashParams = window.location.hash ? utilStringQs(window.location.hash) : {};
+	  context.isFirstSession = !corePreferences('sawSplash') && !corePreferences('sawPrivacyVersion');
+	  /* Changeset */
+	  // An osmChangeset object. Not loaded until needed.
+
+	  context.changeset = null;
+	  var _defaultChangesetComment = context.initialHashParams.comment;
+	  var _defaultChangesetSource = context.initialHashParams.source;
+	  var _defaultChangesetHashtags = context.initialHashParams.hashtags;
 
-	    return found
+	  context.defaultChangesetComment = function (val) {
+	    if (!arguments.length) return _defaultChangesetComment;
+	    _defaultChangesetComment = val;
+	    return context;
 	  };
 
-	  return ArrayList;
-	}(List));
+	  context.defaultChangesetSource = function (val) {
+	    if (!arguments.length) return _defaultChangesetSource;
+	    _defaultChangesetSource = val;
+	    return context;
+	  };
 
-	/**
-	 * @extends {Iterator}
-	 * @param {ArrayList} arrayList
-	 * @constructor
-	 * @private
-	 */
-	var Iterator_ = (function (Iterator$$1) {
-	  function Iterator_ (arrayList) {
-	    Iterator$$1.call(this);
-	    /**
-	     * @type {ArrayList}
-	     * @private
-	    */
-	    this.arrayList_ = arrayList;
-	    /**
-	     * @type {number}
-	     * @private
-	    */
-	    this.position_ = 0;
-	  }
+	  context.defaultChangesetHashtags = function (val) {
+	    if (!arguments.length) return _defaultChangesetHashtags;
+	    _defaultChangesetHashtags = val;
+	    return context;
+	  };
+	  /* Document title */
 
-	  if ( Iterator$$1 ) { Iterator_.__proto__ = Iterator$$1; }
-	  Iterator_.prototype = Object.create( Iterator$$1 && Iterator$$1.prototype );
-	  Iterator_.prototype.constructor = Iterator_;
+	  /* (typically shown as the label for the browser window/tab) */
+	  // If true, iD will update the title based on what the user is doing
 
-	  /**
-	   * @override
-	   */
-	  Iterator_.prototype.next = function next () {
-	    if (this.position_ === this.arrayList_.size()) {
-	      throw new NoSuchElementException()
-	    }
-	    return this.arrayList_.get(this.position_++)
+
+	  var _setsDocumentTitle = true;
+
+	  context.setsDocumentTitle = function (val) {
+	    if (!arguments.length) return _setsDocumentTitle;
+	    _setsDocumentTitle = val;
+	    return context;
+	  }; // The part of the title that is always the same
+
+
+	  var _documentTitleBase = document.title;
+
+	  context.documentTitleBase = function (val) {
+	    if (!arguments.length) return _documentTitleBase;
+	    _documentTitleBase = val;
+	    return context;
 	  };
+	  /* User interface and keybinding */
 
-	  /**
-	   * @override
-	   */
-	  Iterator_.prototype.hasNext = function hasNext () {
-	    if (this.position_ < this.arrayList_.size()) {
-	      return true
-	    } else {
-	      return false
-	    }
+
+	  var _ui;
+
+	  context.ui = function () {
+	    return _ui;
 	  };
 
-	  /**
-	   * TODO: should be in ListIterator
-	   * @override
-	   */
-	  Iterator_.prototype.set = function set (element) {
-	    return this.arrayList_.set(this.position_ - 1, element)
+	  context.lastPointerType = function () {
+	    return _ui.lastPointerType();
 	  };
 
-	  /**
-	   * @override
-	   */
-	  Iterator_.prototype.remove = function remove () {
-	    this.arrayList_.remove(this.arrayList_.get(this.position_));
-	  };
-
-	  return Iterator_;
-	}(Iterator$1));
-
-	var CoordinateList = (function (ArrayList$$1) {
-	  function CoordinateList () {
-	    ArrayList$$1.call(this);
-	    if (arguments.length === 0) ; else if (arguments.length === 1) {
-	      var coord = arguments[0];
-	      this.ensureCapacity(coord.length);
-	      this.add(coord, true);
-	    } else if (arguments.length === 2) {
-	      var coord$1 = arguments[0];
-	      var allowRepeated = arguments[1];
-	      this.ensureCapacity(coord$1.length);
-	      this.add(coord$1, allowRepeated);
-	    }
-	  }
-
-	  if ( ArrayList$$1 ) { CoordinateList.__proto__ = ArrayList$$1; }
-	  CoordinateList.prototype = Object.create( ArrayList$$1 && ArrayList$$1.prototype );
-	  CoordinateList.prototype.constructor = CoordinateList;
-
-	  var staticAccessors = { coordArrayType: { configurable: true } };
-	  staticAccessors.coordArrayType.get = function () { return new Array(0).fill(null) };
-	  CoordinateList.prototype.getCoordinate = function getCoordinate (i) {
-	    return this.get(i)
-	  };
-	  CoordinateList.prototype.addAll = function addAll () {
-	    var this$1 = this;
-
-	    if (arguments.length === 2) {
-	      var coll = arguments[0];
-	      var allowRepeated = arguments[1];
-	      var isChanged = false;
-	      for (var i = coll.iterator(); i.hasNext();) {
-	        this$1.add(i.next(), allowRepeated);
-	        isChanged = true;
-	      }
-	      return isChanged
-	    } else { return ArrayList$$1.prototype.addAll.apply(this, arguments) }
-	  };
-	  CoordinateList.prototype.clone = function clone () {
-	    var this$1 = this;
-
-	    var clone = ArrayList$$1.prototype.clone.call(this);
-	    for (var i = 0; i < this.size(); i++) {
-	      clone.add(i, this$1.get(i).copy());
-	    }
-	    return clone
-	  };
-	  CoordinateList.prototype.toCoordinateArray = function toCoordinateArray () {
-	    return this.toArray(CoordinateList.coordArrayType)
-	  };
-	  CoordinateList.prototype.add = function add () {
-	    var this$1 = this;
-
-	    if (arguments.length === 1) {
-	      var coord = arguments[0];
-	      ArrayList$$1.prototype.add.call(this, coord);
-	    } else if (arguments.length === 2) {
-	      if (arguments[0] instanceof Array && typeof arguments[1] === 'boolean') {
-	        var coord$1 = arguments[0];
-	        var allowRepeated = arguments[1];
-	        this.add(coord$1, allowRepeated, true);
-	        return true
-	      } else if (arguments[0] instanceof Coordinate && typeof arguments[1] === 'boolean') {
-	        var coord$2 = arguments[0];
-	        var allowRepeated$1 = arguments[1];
-	        if (!allowRepeated$1) {
-	          if (this.size() >= 1) {
-	            var last = this.get(this.size() - 1);
-	            if (last.equals2D(coord$2)) { return null }
-	          }
-	        }
-	        ArrayList$$1.prototype.add.call(this, coord$2);
-	      } else if (arguments[0] instanceof Object && typeof arguments[1] === 'boolean') {
-	        var obj = arguments[0];
-	        var allowRepeated$2 = arguments[1];
-	        this.add(obj, allowRepeated$2);
-	        return true
-	      }
-	    } else if (arguments.length === 3) {
-	      if (typeof arguments[2] === 'boolean' && (arguments[0] instanceof Array && typeof arguments[1] === 'boolean')) {
-	        var coord$3 = arguments[0];
-	        var allowRepeated$3 = arguments[1];
-	        var direction = arguments[2];
-	        if (direction) {
-	          for (var i$1 = 0; i$1 < coord$3.length; i$1++) {
-	            this$1.add(coord$3[i$1], allowRepeated$3);
-	          }
-	        } else {
-	          for (var i$2 = coord$3.length - 1; i$2 >= 0; i$2--) {
-	            this$1.add(coord$3[i$2], allowRepeated$3);
-	          }
-	        }
-	        return true
-	      } else if (typeof arguments[2] === 'boolean' && (Number.isInteger(arguments[0]) && arguments[1] instanceof Coordinate)) {
-	        var i$3 = arguments[0];
-	        var coord$4 = arguments[1];
-	        var allowRepeated$4 = arguments[2];
-	        if (!allowRepeated$4) {
-	          var size = this.size();
-	          if (size > 0) {
-	            if (i$3 > 0) {
-	              var prev = this.get(i$3 - 1);
-	              if (prev.equals2D(coord$4)) { return null }
-	            }
-	            if (i$3 < size) {
-	              var next = this.get(i$3);
-	              if (next.equals2D(coord$4)) { return null }
-	            }
-	          }
-	        }
-	        ArrayList$$1.prototype.add.call(this, i$3, coord$4);
-	      }
-	    } else if (arguments.length === 4) {
-	      var coord$5 = arguments[0];
-	      var allowRepeated$5 = arguments[1];
-	      var start = arguments[2];
-	      var end = arguments[3];
-	      var inc = 1;
-	      if (start > end) { inc = -1; }
-	      for (var i = start; i !== end; i += inc) {
-	        this$1.add(coord$5[i], allowRepeated$5);
-	      }
-	      return true
-	    }
+	  var _keybinding = utilKeybinding('context');
+
+	  context.keybinding = function () {
+	    return _keybinding;
 	  };
-	  CoordinateList.prototype.closeRing = function closeRing () {
-	    if (this.size() > 0) { this.add(new Coordinate(this.get(0)), false); }
+
+	  select(document).call(_keybinding);
+	  /* Straight accessors. Avoid using these if you can. */
+	  // Instantiate the connection here because it doesn't require passing in
+	  // `context` and it's needed for pre-init calls like `preauth`
+
+	  var _connection = services.osm;
+
+	  var _history;
+
+	  var _validator;
+
+	  var _uploader;
+
+	  context.connection = function () {
+	    return _connection;
 	  };
-	  CoordinateList.prototype.interfaces_ = function interfaces_ () {
-	    return []
+
+	  context.history = function () {
+	    return _history;
 	  };
-	  CoordinateList.prototype.getClass = function getClass () {
-	    return CoordinateList
+
+	  context.validator = function () {
+	    return _validator;
 	  };
 
-	  Object.defineProperties( CoordinateList, staticAccessors );
+	  context.uploader = function () {
+	    return _uploader;
+	  };
+	  /* Connection */
 
-	  return CoordinateList;
-	}(ArrayList));
 
-	var CoordinateArrays = function CoordinateArrays () {};
+	  context.preauth = function (options) {
+	    if (_connection) {
+	      _connection["switch"](options);
+	    }
 
-	var staticAccessors$13 = { ForwardComparator: { configurable: true },BidirectionalComparator: { configurable: true },coordArrayType: { configurable: true } };
+	    return context;
+	  };
+	  /* connection options for source switcher (optional) */
 
-	staticAccessors$13.ForwardComparator.get = function () { return ForwardComparator };
-	staticAccessors$13.BidirectionalComparator.get = function () { return BidirectionalComparator };
-	staticAccessors$13.coordArrayType.get = function () { return new Array(0).fill(null) };
 
-	CoordinateArrays.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CoordinateArrays.prototype.getClass = function getClass () {
-	  return CoordinateArrays
-	};
-	CoordinateArrays.isRing = function isRing (pts) {
-	  if (pts.length < 4) { return false }
-	  if (!pts[0].equals2D(pts[pts.length - 1])) { return false }
-	  return true
-	};
-	CoordinateArrays.ptNotInList = function ptNotInList (testPts, pts) {
-	  for (var i = 0; i < testPts.length; i++) {
-	    var testPt = testPts[i];
-	    if (CoordinateArrays.indexOf(testPt, pts) < 0) { return testPt }
-	  }
-	  return null
-	};
-	CoordinateArrays.scroll = function scroll (coordinates, firstCoordinate) {
-	  var i = CoordinateArrays.indexOf(firstCoordinate, coordinates);
-	  if (i < 0) { return null }
-	  var newCoordinates = new Array(coordinates.length).fill(null);
-	  System.arraycopy(coordinates, i, newCoordinates, 0, coordinates.length - i);
-	  System.arraycopy(coordinates, 0, newCoordinates, coordinates.length - i, i);
-	  System.arraycopy(newCoordinates, 0, coordinates, 0, coordinates.length);
-	};
-	CoordinateArrays.equals = function equals () {
-	  if (arguments.length === 2) {
-	    var coord1 = arguments[0];
-	    var coord2 = arguments[1];
-	    if (coord1 === coord2) { return true }
-	    if (coord1 === null || coord2 === null) { return false }
-	    if (coord1.length !== coord2.length) { return false }
-	    for (var i = 0; i < coord1.length; i++) {
-	      if (!coord1[i].equals(coord2[i])) { return false }
-	    }
-	    return true
-	  } else if (arguments.length === 3) {
-	    var coord1$1 = arguments[0];
-	    var coord2$1 = arguments[1];
-	    var coordinateComparator = arguments[2];
-	    if (coord1$1 === coord2$1) { return true }
-	    if (coord1$1 === null || coord2$1 === null) { return false }
-	    if (coord1$1.length !== coord2$1.length) { return false }
-	    for (var i$1 = 0; i$1 < coord1$1.length; i$1++) {
-	      if (coordinateComparator.compare(coord1$1[i$1], coord2$1[i$1]) !== 0) { return false }
-	    }
-	    return true
-	  }
-	};
-	CoordinateArrays.intersection = function intersection (coordinates, env) {
-	  var coordList = new CoordinateList();
-	  for (var i = 0; i < coordinates.length; i++) {
-	    if (env.intersects(coordinates[i])) { coordList.add(coordinates[i], true); }
-	  }
-	  return coordList.toCoordinateArray()
-	};
-	CoordinateArrays.hasRepeatedPoints = function hasRepeatedPoints (coord) {
-	  for (var i = 1; i < coord.length; i++) {
-	    if (coord[i - 1].equals(coord[i])) {
-	      return true
-	    }
-	  }
-	  return false
-	};
-	CoordinateArrays.removeRepeatedPoints = function removeRepeatedPoints (coord) {
-	  if (!CoordinateArrays.hasRepeatedPoints(coord)) { return coord }
-	  var coordList = new CoordinateList(coord, false);
-	  return coordList.toCoordinateArray()
-	};
-	CoordinateArrays.reverse = function reverse (coord) {
-	  var last = coord.length - 1;
-	  var mid = Math.trunc(last / 2);
-	  for (var i = 0; i <= mid; i++) {
-	    var tmp = coord[i];
-	    coord[i] = coord[last - i];
-	    coord[last - i] = tmp;
-	  }
-	};
-	CoordinateArrays.removeNull = function removeNull (coord) {
-	  var nonNull = 0;
-	  for (var i = 0; i < coord.length; i++) {
-	    if (coord[i] !== null) { nonNull++; }
-	  }
-	  var newCoord = new Array(nonNull).fill(null);
-	  if (nonNull === 0) { return newCoord }
-	  var j = 0;
-	  for (var i$1 = 0; i$1 < coord.length; i$1++) {
-	    if (coord[i$1] !== null) { newCoord[j++] = coord[i$1]; }
-	  }
-	  return newCoord
-	};
-	CoordinateArrays.copyDeep = function copyDeep () {
-	  if (arguments.length === 1) {
-	    var coordinates = arguments[0];
-	    var copy = new Array(coordinates.length).fill(null);
-	    for (var i = 0; i < coordinates.length; i++) {
-	      copy[i] = new Coordinate(coordinates[i]);
-	    }
-	    return copy
-	  } else if (arguments.length === 5) {
-	    var src = arguments[0];
-	    var srcStart = arguments[1];
-	    var dest = arguments[2];
-	    var destStart = arguments[3];
-	    var length = arguments[4];
-	    for (var i$1 = 0; i$1 < length; i$1++) {
-	      dest[destStart + i$1] = new Coordinate(src[srcStart + i$1]);
-	    }
-	  }
-	};
-	CoordinateArrays.isEqualReversed = function isEqualReversed (pts1, pts2) {
-	  for (var i = 0; i < pts1.length; i++) {
-	    var p1 = pts1[i];
-	    var p2 = pts2[pts1.length - i - 1];
-	    if (p1.compareTo(p2) !== 0) { return false }
-	  }
-	  return true
-	};
-	CoordinateArrays.envelope = function envelope (coordinates) {
-	  var env = new Envelope();
-	  for (var i = 0; i < coordinates.length; i++) {
-	    env.expandToInclude(coordinates[i]);
-	  }
-	  return env
-	};
-	CoordinateArrays.toCoordinateArray = function toCoordinateArray (coordList) {
-	  return coordList.toArray(CoordinateArrays.coordArrayType)
-	};
-	CoordinateArrays.atLeastNCoordinatesOrNothing = function atLeastNCoordinatesOrNothing (n, c) {
-	  return c.length >= n ? c : []
-	};
-	CoordinateArrays.indexOf = function indexOf (coordinate, coordinates) {
-	  for (var i = 0; i < coordinates.length; i++) {
-	    if (coordinate.equals(coordinates[i])) {
-	      return i
-	    }
-	  }
-	  return -1
-	};
-	CoordinateArrays.increasingDirection = function increasingDirection (pts) {
-	  for (var i = 0; i < Math.trunc(pts.length / 2); i++) {
-	    var j = pts.length - 1 - i;
-	    var comp = pts[i].compareTo(pts[j]);
-	    if (comp !== 0) { return comp }
-	  }
-	  return 1
-	};
-	CoordinateArrays.compare = function compare (pts1, pts2) {
-	  var i = 0;
-	  while (i < pts1.length && i < pts2.length) {
-	    var compare = pts1[i].compareTo(pts2[i]);
-	    if (compare !== 0) { return compare }
-	    i++;
-	  }
-	  if (i < pts2.length) { return -1 }
-	  if (i < pts1.length) { return 1 }
-	  return 0
-	};
-	CoordinateArrays.minCoordinate = function minCoordinate (coordinates) {
-	  var minCoord = null;
-	  for (var i = 0; i < coordinates.length; i++) {
-	    if (minCoord === null || minCoord.compareTo(coordinates[i]) > 0) {
-	      minCoord = coordinates[i];
-	    }
-	  }
-	  return minCoord
-	};
-	CoordinateArrays.extract = function extract (pts, start, end) {
-	  start = MathUtil.clamp(start, 0, pts.length);
-	  end = MathUtil.clamp(end, -1, pts.length);
-	  var npts = end - start + 1;
-	  if (end < 0) { npts = 0; }
-	  if (start >= pts.length) { npts = 0; }
-	  if (end < start) { npts = 0; }
-	  var extractPts = new Array(npts).fill(null);
-	  if (npts === 0) { return extractPts }
-	  var iPts = 0;
-	  for (var i = start; i <= end; i++) {
-	    extractPts[iPts++] = pts[i];
-	  }
-	  return extractPts
-	};
+	  var _apiConnections;
 
-	Object.defineProperties( CoordinateArrays, staticAccessors$13 );
+	  context.apiConnections = function (val) {
+	    if (!arguments.length) return _apiConnections;
+	    _apiConnections = val;
+	    return context;
+	  }; // A string or array or locale codes to prefer over the browser's settings
 
-	var ForwardComparator = function ForwardComparator () {};
 
-	ForwardComparator.prototype.compare = function compare (o1, o2) {
-	  var pts1 = o1;
-	  var pts2 = o2;
-	  return CoordinateArrays.compare(pts1, pts2)
-	};
-	ForwardComparator.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparator]
-	};
-	ForwardComparator.prototype.getClass = function getClass () {
-	  return ForwardComparator
-	};
+	  context.locale = function (locale) {
+	    if (!arguments.length) return _mainLocalizer.localeCode();
+	    _mainLocalizer.preferredLocaleCodes(locale);
+	    return context;
+	  };
 
-	var BidirectionalComparator = function BidirectionalComparator () {};
-
-	BidirectionalComparator.prototype.compare = function compare (o1, o2) {
-	  var pts1 = o1;
-	  var pts2 = o2;
-	  if (pts1.length < pts2.length) { return -1 }
-	  if (pts1.length > pts2.length) { return 1 }
-	  if (pts1.length === 0) { return 0 }
-	  var forwardComp = CoordinateArrays.compare(pts1, pts2);
-	  var isEqualRev = CoordinateArrays.isEqualReversed(pts1, pts2);
-	  if (isEqualRev) { return 0 }
-	  return forwardComp
-	};
-	BidirectionalComparator.prototype.OLDcompare = function OLDcompare (o1, o2) {
-	  var pts1 = o1;
-	  var pts2 = o2;
-	  if (pts1.length < pts2.length) { return -1 }
-	  if (pts1.length > pts2.length) { return 1 }
-	  if (pts1.length === 0) { return 0 }
-	  var dir1 = CoordinateArrays.increasingDirection(pts1);
-	  var dir2 = CoordinateArrays.increasingDirection(pts2);
-	  var i1 = dir1 > 0 ? 0 : pts1.length - 1;
-	  var i2 = dir2 > 0 ? 0 : pts1.length - 1;
-	  for (var i = 0; i < pts1.length; i++) {
-	    var comparePt = pts1[i1].compareTo(pts2[i2]);
-	    if (comparePt !== 0) { return comparePt }
-	    i1 += dir1;
-	    i2 += dir2;
-	  }
-	  return 0
-	};
-	BidirectionalComparator.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparator]
-	};
-	BidirectionalComparator.prototype.getClass = function getClass () {
-	  return BidirectionalComparator
-	};
+	  function afterLoad(cid, callback) {
+	    return function (err, result) {
+	      if (err) {
+	        // 400 Bad Request, 401 Unauthorized, 403 Forbidden..
+	        if (err.status === 400 || err.status === 401 || err.status === 403) {
+	          if (_connection) {
+	            _connection.logout();
+	          }
+	        }
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/Map.html
-	 *
-	 * @constructor
-	 * @private
-	 */
-	var Map$1$1 = function Map () {};
+	        if (typeof callback === 'function') {
+	          callback(err);
+	        }
 
-	Map$1$1.prototype.get = function get () {};
-	/**
-	 * Associates the specified value with the specified key in this map (optional
-	 * operation).
-	 * @param {Object} key
-	 * @param {Object} value
-	 * @return {Object}
-	 */
-	Map$1$1.prototype.put = function put () {};
+	        return;
+	      } else if (_connection && _connection.getConnectionId() !== cid) {
+	        if (typeof callback === 'function') {
+	          callback({
+	            message: 'Connection Switched',
+	            status: -1
+	          });
+	        }
 
-	/**
-	 * Returns the number of key-value mappings in this map.
-	 * @return {number}
-	 */
-	Map$1$1.prototype.size = function size () {};
+	        return;
+	      } else {
+	        _history.merge(result.data, result.extent);
 
-	/**
-	 * Returns a Collection view of the values contained in this map.
-	 * @return {javascript.util.Collection}
-	 */
-	Map$1$1.prototype.values = function values () {};
+	        if (typeof callback === 'function') {
+	          callback(err, result);
+	        }
 
-	/**
-	 * Returns a {@link Set} view of the mappings contained in this map.
-	 * The set is backed by the map, so changes to the map are
-	 * reflected in the set, and vice-versa.If the map is modified
-	 * while an iteration over the set is in progress (except through
-	 * the iterator's own <tt>remove</tt> operation, or through the
-	 * <tt>setValue</tt> operation on a map entry returned by the
-	 * iterator) the results of the iteration are undefined.The set
-	 * supports element removal, which removes the corresponding
-	 * mapping from the map, via the <tt>Iterator.remove</tt>,
-	 * <tt>Set.remove</tt>, <tt>removeAll</tt>, <tt>retainAll</tt> and
-	 * <tt>clear</tt> operations.It does not support the
-	 * <tt>add</tt> or <tt>addAll</tt> operations.
-	 *
-	 * @return {Set} a set view of the mappings contained in this map
-	 */
-	Map$1$1.prototype.entrySet = function entrySet () {};
+	        return;
+	      }
+	    };
+	  }
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/SortedMap.html
-	 *
-	 * @extends {Map}
-	 * @constructor
-	 * @private
-	 */
-	var SortedMap = (function (Map) {
-		function SortedMap () {
-			Map.apply(this, arguments);
-		}if ( Map ) { SortedMap.__proto__ = Map; }
-		SortedMap.prototype = Object.create( Map && Map.prototype );
-		SortedMap.prototype.constructor = SortedMap;
+	  context.loadTiles = function (projection, callback) {
+	    var handle = window.requestIdleCallback(function () {
+	      _deferred["delete"](handle);
 
-		
+	      if (_connection && context.editableDataEnabled()) {
+	        var cid = _connection.getConnectionId();
 
-		return SortedMap;
-	}(Map$1$1));
+	        _connection.loadTiles(projection, afterLoad(cid, callback));
+	      }
+	    });
 
-	/**
-	 * @param {string=} message Optional message
-	 * @extends {Error}
-	 * @constructor
-	 * @private
-	 */
-	function OperationNotSupported (message) {
-	  this.message = message || '';
-	}
-	OperationNotSupported.prototype = new Error();
+	    _deferred.add(handle);
+	  };
 
-	/**
-	 * @type {string}
-	 */
-	OperationNotSupported.prototype.name = 'OperationNotSupported';
+	  context.loadTileAtLoc = function (loc, callback) {
+	    var handle = window.requestIdleCallback(function () {
+	      _deferred["delete"](handle);
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/Set.html
-	 *
-	 * @extends {Collection}
-	 * @constructor
-	 * @private
-	 */
-	function Set$2() {}
-	Set$2.prototype = new Collection();
+	      if (_connection && context.editableDataEnabled()) {
+	        var cid = _connection.getConnectionId();
 
+	        _connection.loadTileAtLoc(loc, afterLoad(cid, callback));
+	      }
+	    });
 
-	/**
-	 * Returns true if this set contains the specified element. More formally,
-	 * returns true if and only if this set contains an element e such that (o==null ?
-	 * e==null : o.equals(e)).
-	 * @param {Object} e
-	 * @return {boolean}
-	 */
-	Set$2.prototype.contains = function() {};
+	    _deferred.add(handle);
+	  }; // Download the full entity and its parent relations. The callback may be called multiple times.
 
-	/**
-	 * @see http://docs.oracle.com/javase/6/docs/api/java/util/HashSet.html
-	 *
-	 * @extends {javascript.util.Set}
-	 * @constructor
-	 * @private
-	 */
-	var HashSet = (function (Set$$1) {
-	  function HashSet () {
-	    Set$$1.call(this);
-	    this.array_ = [];
 
-	    if (arguments[0] instanceof Collection) {
-	      this.addAll(arguments[0]);
-	    }
-	  }
+	  context.loadEntity = function (entityID, callback) {
+	    if (_connection) {
+	      var cid = _connection.getConnectionId();
 
-	  if ( Set$$1 ) { HashSet.__proto__ = Set$$1; }
-	  HashSet.prototype = Object.create( Set$$1 && Set$$1.prototype );
-	  HashSet.prototype.constructor = HashSet;
+	      _connection.loadEntity(entityID, afterLoad(cid, callback)); // We need to fetch the parent relations separately.
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.contains = function contains (o) {
-	    var this$1 = this;
 
-	    for (var i = 0, len = this.array_.length; i < len; i++) {
-	      var e = this$1.array_[i];
-	      if (e === o) {
-	        return true
-	      }
+	      _connection.loadEntityRelations(entityID, afterLoad(cid, callback));
 	    }
-	    return false
 	  };
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.add = function add (o) {
-	    if (this.contains(o)) {
-	      return false
-	    }
+	  context.zoomToEntity = function (entityID, zoomTo) {
+	    // be sure to load the entity even if we're not going to zoom to it
+	    context.loadEntity(entityID, function (err, result) {
+	      if (err) return;
 
-	    this.array_.push(o);
+	      if (zoomTo !== false) {
+	        var entity = result.data.find(function (e) {
+	          return e.id === entityID;
+	        });
 
-	    return true
-	  };
+	        if (entity) {
+	          _map.zoomTo(entity);
+	        }
+	      }
+	    });
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.addAll = function addAll (c) {
-	    var this$1 = this;
+	    _map.on('drawn.zoomToEntity', function () {
+	      if (!context.hasEntity(entityID)) return;
 
-	    for (var i = c.iterator(); i.hasNext();) {
-	      this$1.add(i.next());
-	    }
-	    return true
-	  };
+	      _map.on('drawn.zoomToEntity', null);
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.remove = function remove (o) {
-	    // throw new javascript.util.OperationNotSupported()
-	    throw new Error()
-	  };
+	      context.on('enter.zoomToEntity', null);
+	      context.enter(modeSelect(context, [entityID]));
+	    });
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.size = function size () {
-	    return this.array_.length
-	  };
+	    context.on('enter.zoomToEntity', function () {
+	      if (_mode.id !== 'browse') {
+	        _map.on('drawn.zoomToEntity', null);
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.isEmpty = function isEmpty () {
-	    return this.array_.length === 0
+	        context.on('enter.zoomToEntity', null);
+	      }
+	    });
 	  };
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.toArray = function toArray () {
-	    var this$1 = this;
+	  var _minEditableZoom = 16;
 
-	    var array = [];
+	  context.minEditableZoom = function (val) {
+	    if (!arguments.length) return _minEditableZoom;
+	    _minEditableZoom = val;
 
-	    for (var i = 0, len = this.array_.length; i < len; i++) {
-	      array.push(this$1.array_[i]);
+	    if (_connection) {
+	      _connection.tileZoom(val);
 	    }
 
-	    return array
+	    return context;
+	  }; // String length limits in Unicode characters, not JavaScript UTF-16 code units
+
+
+	  context.maxCharsForTagKey = function () {
+	    return 255;
 	  };
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.iterator = function iterator () {
-	    return new Iterator_$1(this)
+	  context.maxCharsForTagValue = function () {
+	    return 255;
 	  };
 
-	  return HashSet;
-	}(Set$2));
+	  context.maxCharsForRelationRole = function () {
+	    return 255;
+	  };
 
-	/**
-	   * @extends {Iterator}
-	   * @param {HashSet} hashSet
-	   * @constructor
-	   * @private
-	   */
-	var Iterator_$1 = (function (Iterator$$1) {
-	  function Iterator_ (hashSet) {
-	    Iterator$$1.call(this);
-	    /**
-	     * @type {HashSet}
-	     * @private
-	     */
-	    this.hashSet_ = hashSet;
-	    /**
-	     * @type {number}
-	     * @private
-	     */
-	    this.position_ = 0;
-	  }
+	  function cleanOsmString(val, maxChars) {
+	    // be lenient with input
+	    if (val === undefined || val === null) {
+	      val = '';
+	    } else {
+	      val = val.toString();
+	    } // remove whitespace
 
-	  if ( Iterator$$1 ) { Iterator_.__proto__ = Iterator$$1; }
-	  Iterator_.prototype = Object.create( Iterator$$1 && Iterator$$1.prototype );
-	  Iterator_.prototype.constructor = Iterator_;
 
-	  /**
-	   * @override
-	   */
-	  Iterator_.prototype.next = function next () {
-	    if (this.position_ === this.hashSet_.size()) {
-	      throw new NoSuchElementException()
-	    }
-	    return this.hashSet_.array_[this.position_++]
+	    val = val.trim(); // use the canonical form of the string
+
+	    if (val.normalize) val = val.normalize('NFC'); // trim to the number of allowed characters
+
+	    return utilUnicodeCharsTruncated(val, maxChars);
+	  }
+
+	  context.cleanTagKey = function (val) {
+	    return cleanOsmString(val, context.maxCharsForTagKey());
 	  };
 
-	  /**
-	   * @override
-	   */
-	  Iterator_.prototype.hasNext = function hasNext () {
-	    if (this.position_ < this.hashSet_.size()) {
-	      return true
-	    } else {
-	      return false
-	    }
+	  context.cleanTagValue = function (val) {
+	    return cleanOsmString(val, context.maxCharsForTagValue());
 	  };
 
-	  /**
-	   * @override
-	   */
-	  Iterator_.prototype.remove = function remove () {
-	    throw new OperationNotSupported()
+	  context.cleanRelationRole = function (val) {
+	    return cleanOsmString(val, context.maxCharsForRelationRole());
 	  };
+	  /* History */
 
-	  return Iterator_;
-	}(Iterator$1));
 
-	var BLACK = 0;
-	var RED = 1;
-	function colorOf (p) { return (p === null ? BLACK : p.color) }
-	function parentOf (p) { return (p === null ? null : p.parent) }
-	function setColor (p, c) { if (p !== null) { p.color = c; } }
-	function leftOf (p) { return (p === null ? null : p.left) }
-	function rightOf (p) { return (p === null ? null : p.right) }
+	  var _inIntro = false;
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/TreeMap.html
-	 *
-	 * @extends {SortedMap}
-	 * @constructor
-	 * @private
-	 */
-	function TreeMap () {
-	  /**
-	   * @type {Object}
-	   * @private
-	   */
-	  this.root_ = null;
-	  /**
-	   * @type {number}
-	   * @private
-	  */
-	  this.size_ = 0;
-	}
-	TreeMap.prototype = new SortedMap();
+	  context.inIntro = function (val) {
+	    if (!arguments.length) return _inIntro;
+	    _inIntro = val;
+	    return context;
+	  }; // Immediately save the user's history to localstorage, if possible
+	  // This is called someteimes, but also on the `window.onbeforeunload` handler
 
-	/**
-	 * @override
-	 */
-	TreeMap.prototype.get = function (key) {
-	  var p = this.root_;
-	  while (p !== null) {
-	    var cmp = key['compareTo'](p.key);
-	    if (cmp < 0) { p = p.left; }
-	    else if (cmp > 0) { p = p.right; }
-	    else { return p.value }
-	  }
-	  return null
-	};
 
-	/**
-	 * @override
-	 */
-	TreeMap.prototype.put = function (key, value) {
-	  if (this.root_ === null) {
-	    this.root_ = {
-	      key: key,
-	      value: value,
-	      left: null,
-	      right: null,
-	      parent: null,
-	      color: BLACK,
-	      getValue: function getValue () { return this.value },
-	      getKey: function getKey () { return this.key }
-	    };
-	    this.size_ = 1;
-	    return null
-	  }
-	  var t = this.root_;
-	  var parent;
-	  var cmp;
-	  do {
-	    parent = t;
-	    cmp = key['compareTo'](t.key);
-	    if (cmp < 0) {
-	      t = t.left;
-	    } else if (cmp > 0) {
-	      t = t.right;
-	    } else {
-	      var oldValue = t.value;
-	      t.value = value;
-	      return oldValue
-	    }
-	  } while (t !== null)
-	  var e = {
-	    key: key,
-	    left: null,
-	    right: null,
-	    value: value,
-	    parent: parent,
-	    color: BLACK,
-	    getValue: function getValue () { return this.value },
-	    getKey: function getKey () { return this.key }
-	  };
-	  if (cmp < 0) {
-	    parent.left = e;
-	  } else {
-	    parent.right = e;
-	  }
-	  this.fixAfterInsertion(e);
-	  this.size_++;
-	  return null
-	};
+	  context.save = function () {
+	    // no history save, no message onbeforeunload
+	    if (_inIntro || context.container().select('.modal').size()) return;
+	    var canSave;
 
-	/**
-	 * @param {Object} x
-	 */
-	TreeMap.prototype.fixAfterInsertion = function (x) {
-	  var this$1 = this;
-
-	  x.color = RED;
-	  while (x != null && x !== this.root_ && x.parent.color === RED) {
-	    if (parentOf(x) === leftOf(parentOf(parentOf(x)))) {
-	      var y = rightOf(parentOf(parentOf(x)));
-	      if (colorOf(y) === RED) {
-	        setColor(parentOf(x), BLACK);
-	        setColor(y, BLACK);
-	        setColor(parentOf(parentOf(x)), RED);
-	        x = parentOf(parentOf(x));
-	      } else {
-	        if (x === rightOf(parentOf(x))) {
-	          x = parentOf(x);
-	          this$1.rotateLeft(x);
-	        }
-	        setColor(parentOf(x), BLACK);
-	        setColor(parentOf(parentOf(x)), RED);
-	        this$1.rotateRight(parentOf(parentOf(x)));
+	    if (_mode && _mode.id === 'save') {
+	      canSave = false; // Attempt to prevent user from creating duplicate changes - see #5200
+
+	      if (services.osm && services.osm.isChangesetInflight()) {
+	        _history.clearSaved();
+
+	        return;
 	      }
 	    } else {
-	      var y$1 = leftOf(parentOf(parentOf(x)));
-	      if (colorOf(y$1) === RED) {
-	        setColor(parentOf(x), BLACK);
-	        setColor(y$1, BLACK);
-	        setColor(parentOf(parentOf(x)), RED);
-	        x = parentOf(parentOf(x));
-	      } else {
-	        if (x === leftOf(parentOf(x))) {
-	          x = parentOf(x);
-	          this$1.rotateRight(x);
-	        }
-	        setColor(parentOf(x), BLACK);
-	        setColor(parentOf(parentOf(x)), RED);
-	        this$1.rotateLeft(parentOf(parentOf(x)));
-	      }
+	      canSave = context.selectedIDs().every(function (id) {
+	        var entity = context.hasEntity(id);
+	        return entity && !entity.isDegenerate();
+	      });
 	    }
-	  }
-	  this.root_.color = BLACK;
-	};
 
-	/**
-	 * @override
-	 */
-	TreeMap.prototype.values = function () {
-	  var arrayList = new ArrayList();
-	  var p = this.getFirstEntry();
-	  if (p !== null) {
-	    arrayList.add(p.value);
-	    while ((p = TreeMap.successor(p)) !== null) {
-	      arrayList.add(p.value);
+	    if (canSave) {
+	      _history.save();
 	    }
-	  }
-	  return arrayList
-	};
 
-	/**
-	 * @override
-	 */
-	TreeMap.prototype.entrySet = function () {
-	  var hashSet = new HashSet();
-	  var p = this.getFirstEntry();
-	  if (p !== null) {
-	    hashSet.add(p);
-	    while ((p = TreeMap.successor(p)) !== null) {
-	      hashSet.add(p);
+	    if (_history.hasChanges()) {
+	      return _t('save.unsaved_changes');
 	    }
-	  }
-	  return hashSet
-	};
-
-	/**
-	 * @param {Object} p
-	 */
-	TreeMap.prototype.rotateLeft = function (p) {
-	  if (p != null) {
-	    var r = p.right;
-	    p.right = r.left;
-	    if (r.left != null) { r.left.parent = p; }
-	    r.parent = p.parent;
-	    if (p.parent === null) { this.root_ = r; } else if (p.parent.left === p) { p.parent.left = r; } else { p.parent.right = r; }
-	    r.left = p;
-	    p.parent = r;
-	  }
-	};
+	  }; // Debounce save, since it's a synchronous localStorage write,
+	  // and history changes can happen frequently (e.g. when dragging).
 
-	/**
-	 * @param {Object} p
-	 */
-	TreeMap.prototype.rotateRight = function (p) {
-	  if (p != null) {
-	    var l = p.left;
-	    p.left = l.right;
-	    if (l.right != null) { l.right.parent = p; }
-	    l.parent = p.parent;
-	    if (p.parent === null) { this.root_ = l; } else if (p.parent.right === p) { p.parent.right = l; } else { p.parent.left = l; }
-	    l.right = p;
-	    p.parent = l;
-	  }
-	};
 
-	/**
-	 * @return {Object}
-	 */
-	TreeMap.prototype.getFirstEntry = function () {
-	  var p = this.root_;
-	  if (p != null) {
-	    while (p.left != null) {
-	      p = p.left;
-	    }
-	  }
-	  return p
-	};
+	  context.debouncedSave = debounce(context.save, 350);
 
-	/**
-	 * @param {Object} t
-	 * @return {Object}
-	 * @private
-	 */
-	TreeMap.successor = function (t) {
-	  if (t === null) { return null } else if (t.right !== null) {
-	    var p = t.right;
-	    while (p.left !== null) {
-	      p = p.left;
-	    }
-	    return p
-	  } else {
-	    var p$1 = t.parent;
-	    var ch = t;
-	    while (p$1 !== null && ch === p$1.right) {
-	      ch = p$1;
-	      p$1 = p$1.parent;
-	    }
-	    return p$1
+	  function withDebouncedSave(fn) {
+	    return function () {
+	      var result = fn.apply(_history, arguments);
+	      context.debouncedSave();
+	      return result;
+	    };
 	  }
-	};
+	  /* Graph */
 
-	/**
-	 * @override
-	 */
-	TreeMap.prototype.size = function () {
-	  return this.size_
-	};
 
-	var Lineal = function Lineal () {};
+	  context.hasEntity = function (id) {
+	    return _history.graph().hasEntity(id);
+	  };
 
-	Lineal.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Lineal.prototype.getClass = function getClass () {
-	  return Lineal
-	};
+	  context.entity = function (id) {
+	    return _history.graph().entity(id);
+	  };
+	  /* Modes */
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/SortedSet.html
-	 *
-	 * @extends {Set}
-	 * @constructor
-	 * @private
-	 */
-	function SortedSet () {}
-	SortedSet.prototype = new Set$2();
 
-	// import Iterator from './Iterator'
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/TreeSet.html
-	 *
-	 * @extends {SortedSet}
-	 * @constructor
-	 * @private
-	 */
-	function TreeSet () {
-	  /**
-	   * @type {Array}
-	   * @private
-	  */
-	  this.array_ = [];
+	  var _mode;
 
-	  if (arguments[0] instanceof Collection) {
-	    this.addAll(arguments[0]);
-	  }
-	}
-	TreeSet.prototype = new SortedSet();
+	  context.mode = function () {
+	    return _mode;
+	  };
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.contains = function (o) {
-	  var this$1 = this;
+	  context.enter = function (newMode) {
+	    if (_mode) {
+	      _mode.exit();
 
-	  for (var i = 0, len = this.array_.length; i < len; i++) {
-	    var e = this$1.array_[i];
-	    if (e['compareTo'](o) === 0) {
-	      return true
+	      dispatch.call('exit', _this, _mode);
 	    }
-	  }
-	  return false
-	};
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.add = function (o) {
-	  var this$1 = this;
+	    _mode = newMode;
+
+	    _mode.enter();
+
+	    dispatch.call('enter', _this, _mode);
+	  };
 
-	  if (this.contains(o)) {
-	    return false
-	  }
+	  context.selectedIDs = function () {
+	    return _mode && _mode.selectedIDs && _mode.selectedIDs() || [];
+	  };
 
-	  for (var i = 0, len = this.array_.length; i < len; i++) {
-	    var e = this$1.array_[i];
-	    if (e['compareTo'](o) === 1) {
-	      this$1.array_.splice(i, 0, o);
-	      return true
-	    }
-	  }
+	  context.activeID = function () {
+	    return _mode && _mode.activeID && _mode.activeID();
+	  };
 
-	  this.array_.push(o);
+	  var _selectedNoteID;
 
-	  return true
-	};
+	  context.selectedNoteID = function (noteID) {
+	    if (!arguments.length) return _selectedNoteID;
+	    _selectedNoteID = noteID;
+	    return context;
+	  }; // NOTE: Don't change the name of this until UI v3 is merged
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.addAll = function (c) {
-	  var this$1 = this;
 
-	  for (var i = c.iterator(); i.hasNext();) {
-	    this$1.add(i.next());
-	  }
-	  return true
-	};
+	  var _selectedErrorID;
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.remove = function (e) {
-	  throw new OperationNotSupported()
-	};
+	  context.selectedErrorID = function (errorID) {
+	    if (!arguments.length) return _selectedErrorID;
+	    _selectedErrorID = errorID;
+	    return context;
+	  };
+	  /* Behaviors */
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.size = function () {
-	  return this.array_.length
-	};
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.isEmpty = function () {
-	  return this.array_.length === 0
-	};
+	  context.install = function (behavior) {
+	    return context.surface().call(behavior);
+	  };
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.toArray = function () {
-	  var this$1 = this;
+	  context.uninstall = function (behavior) {
+	    return context.surface().call(behavior.off);
+	  };
+	  /* Copy/Paste */
 
-	  var array = [];
 
-	  for (var i = 0, len = this.array_.length; i < len; i++) {
-	    array.push(this$1.array_[i]);
-	  }
+	  var _copyGraph;
 
-	  return array
-	};
+	  context.copyGraph = function () {
+	    return _copyGraph;
+	  };
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.iterator = function () {
-	  return new Iterator_$2(this)
-	};
+	  var _copyIDs = [];
 
-	/**
-	 * @extends {javascript.util.Iterator}
-	 * @param {javascript.util.TreeSet} treeSet
-	 * @constructor
-	 * @private
-	 */
-	var Iterator_$2 = function (treeSet) {
-	  /**
-	   * @type {javascript.util.TreeSet}
-	   * @private
-	   */
-	  this.treeSet_ = treeSet;
-	  /**
-	   * @type {number}
-	   * @private
-	   */
-	  this.position_ = 0;
-	};
+	  context.copyIDs = function (val) {
+	    if (!arguments.length) return _copyIDs;
+	    _copyIDs = val;
+	    _copyGraph = _history.graph();
+	    return context;
+	  };
 
-	/**
-	 * @override
-	 */
-	Iterator_$2.prototype.next = function () {
-	  if (this.position_ === this.treeSet_.size()) {
-	    throw new NoSuchElementException()
-	  }
-	  return this.treeSet_.array_[this.position_++]
-	};
+	  var _copyLonLat;
 
-	/**
-	 * @override
-	 */
-	Iterator_$2.prototype.hasNext = function () {
-	  if (this.position_ < this.treeSet_.size()) {
-	    return true
-	  } else {
-	    return false
-	  }
-	};
+	  context.copyLonLat = function (val) {
+	    if (!arguments.length) return _copyLonLat;
+	    _copyLonLat = val;
+	    return context;
+	  };
+	  /* Background */
 
-	/**
-	 * @override
-	 */
-	Iterator_$2.prototype.remove = function () {
-	  throw new OperationNotSupported()
-	};
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/Arrays.html
-	 *
-	 * @constructor
-	 * @private
-	 */
-	var Arrays = function Arrays () {};
+	  var _background;
 
-	Arrays.sort = function sort () {
-	  var a = arguments[0];
-	  var i;
-	  var t;
-	  var comparator;
-	  var compare;
-	  if (arguments.length === 1) {
-	    compare = function (a, b) {
-	      return a.compareTo(b)
-	    };
-	    a.sort(compare);
-	  } else if (arguments.length === 2) {
-	    comparator = arguments[1];
-	    compare = function (a, b) {
-	      return comparator['compare'](a, b)
-	    };
-	    a.sort(compare);
-	  } else if (arguments.length === 3) {
-	    t = a.slice(arguments[1], arguments[2]);
-	    t.sort();
-	    var r = a.slice(0, arguments[1]).concat(t, a.slice(arguments[2], a.length));
-	    a.splice(0, a.length);
-	    for (i = 0; i < r.length; i++) {
-	      a.push(r[i]);
-	    }
-	  } else if (arguments.length === 4) {
-	    t = a.slice(arguments[1], arguments[2]);
-	    comparator = arguments[3];
-	    compare = function (a, b) {
-	      return comparator['compare'](a, b)
-	    };
-	    t.sort(compare);
-	    r = a.slice(0, arguments[1]).concat(t, a.slice(arguments[2], a.length));
-	    a.splice(0, a.length);
-	    for (i = 0; i < r.length; i++) {
-	      a.push(r[i]);
-	    }
-	  }
-	};
-	/**
-	 * @param {Array} array
-	 * @return {ArrayList}
-	 */
-	Arrays.asList = function asList (array) {
-	  var arrayList = new ArrayList();
-	  for (var i = 0, len = array.length; i < len; i++) {
-	    arrayList.add(array[i]);
-	  }
-	  return arrayList
-	};
+	  context.background = function () {
+	    return _background;
+	  };
+	  /* Features */
 
-	var Dimension = function Dimension () {};
-
-	var staticAccessors$14 = { P: { configurable: true },L: { configurable: true },A: { configurable: true },FALSE: { configurable: true },TRUE: { configurable: true },DONTCARE: { configurable: true },SYM_FALSE: { configurable: true },SYM_TRUE: { configurable: true },SYM_DONTCARE: { configurable: true },SYM_P: { configurable: true },SYM_L: { configurable: true },SYM_A: { configurable: true } };
-
-	staticAccessors$14.P.get = function () { return 0 };
-	staticAccessors$14.L.get = function () { return 1 };
-	staticAccessors$14.A.get = function () { return 2 };
-	staticAccessors$14.FALSE.get = function () { return -1 };
-	staticAccessors$14.TRUE.get = function () { return -2 };
-	staticAccessors$14.DONTCARE.get = function () { return -3 };
-	staticAccessors$14.SYM_FALSE.get = function () { return 'F' };
-	staticAccessors$14.SYM_TRUE.get = function () { return 'T' };
-	staticAccessors$14.SYM_DONTCARE.get = function () { return '*' };
-	staticAccessors$14.SYM_P.get = function () { return '0' };
-	staticAccessors$14.SYM_L.get = function () { return '1' };
-	staticAccessors$14.SYM_A.get = function () { return '2' };
-
-	Dimension.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Dimension.prototype.getClass = function getClass () {
-	  return Dimension
-	};
-	Dimension.toDimensionSymbol = function toDimensionSymbol (dimensionValue) {
-	  switch (dimensionValue) {
-	    case Dimension.FALSE:
-	      return Dimension.SYM_FALSE
-	    case Dimension.TRUE:
-	      return Dimension.SYM_TRUE
-	    case Dimension.DONTCARE:
-	      return Dimension.SYM_DONTCARE
-	    case Dimension.P:
-	      return Dimension.SYM_P
-	    case Dimension.L:
-	      return Dimension.SYM_L
-	    case Dimension.A:
-	      return Dimension.SYM_A
-	  }
-	  throw new IllegalArgumentException('Unknown dimension value: ' + dimensionValue)
-	};
-	Dimension.toDimensionValue = function toDimensionValue (dimensionSymbol) {
-	  switch (Character.toUpperCase(dimensionSymbol)) {
-	    case Dimension.SYM_FALSE:
-	      return Dimension.FALSE
-	    case Dimension.SYM_TRUE:
-	      return Dimension.TRUE
-	    case Dimension.SYM_DONTCARE:
-	      return Dimension.DONTCARE
-	    case Dimension.SYM_P:
-	      return Dimension.P
-	    case Dimension.SYM_L:
-	      return Dimension.L
-	    case Dimension.SYM_A:
-	      return Dimension.A
-	  }
-	  throw new IllegalArgumentException('Unknown dimension symbol: ' + dimensionSymbol)
-	};
 
-	Object.defineProperties( Dimension, staticAccessors$14 );
+	  var _features;
 
-	var GeometryFilter = function GeometryFilter () {};
+	  context.features = function () {
+	    return _features;
+	  };
 
-	GeometryFilter.prototype.filter = function filter (geom) {};
-	GeometryFilter.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryFilter.prototype.getClass = function getClass () {
-	  return GeometryFilter
-	};
+	  context.hasHiddenConnections = function (id) {
+	    var graph = _history.graph();
 
-	var CoordinateSequenceFilter = function CoordinateSequenceFilter () {};
+	    var entity = graph.entity(id);
+	    return _features.hasHiddenConnections(entity, graph);
+	  };
+	  /* Photos */
 
-	CoordinateSequenceFilter.prototype.filter = function filter (seq, i) {};
-	CoordinateSequenceFilter.prototype.isDone = function isDone () {};
-	CoordinateSequenceFilter.prototype.isGeometryChanged = function isGeometryChanged () {};
-	CoordinateSequenceFilter.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CoordinateSequenceFilter.prototype.getClass = function getClass () {
-	  return CoordinateSequenceFilter
-	};
 
-	var GeometryCollection = (function (Geometry$$1) {
-	  function GeometryCollection (geometries, factory) {
-	    Geometry$$1.call(this, factory);
-	    this._geometries = geometries || [];
+	  var _photos;
 
-	    if (Geometry$$1.hasNullElements(this._geometries)) {
-	      throw new IllegalArgumentException('geometries must not contain null elements')
-	    }
-	  }
+	  context.photos = function () {
+	    return _photos;
+	  };
+	  /* Map */
 
-	  if ( Geometry$$1 ) { GeometryCollection.__proto__ = Geometry$$1; }
-	  GeometryCollection.prototype = Object.create( Geometry$$1 && Geometry$$1.prototype );
-	  GeometryCollection.prototype.constructor = GeometryCollection;
 
-	  var staticAccessors = { serialVersionUID: { configurable: true } };
-	  GeometryCollection.prototype.computeEnvelopeInternal = function computeEnvelopeInternal () {
-	    var this$1 = this;
+	  var _map;
 
-	    var envelope = new Envelope();
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      envelope.expandToInclude(this$1._geometries[i].getEnvelopeInternal());
-	    }
-	    return envelope
-	  };
-	  GeometryCollection.prototype.getGeometryN = function getGeometryN (n) {
-	    return this._geometries[n]
+	  context.map = function () {
+	    return _map;
 	  };
-	  GeometryCollection.prototype.getSortIndex = function getSortIndex () {
-	    return Geometry$$1.SORTINDEX_GEOMETRYCOLLECTION
-	  };
-	  GeometryCollection.prototype.getCoordinates = function getCoordinates () {
-	    var this$1 = this;
 
-	    var coordinates = new Array(this.getNumPoints()).fill(null);
-	    var k = -1;
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      var childCoordinates = this$1._geometries[i].getCoordinates();
-	      for (var j = 0; j < childCoordinates.length; j++) {
-	        k++;
-	        coordinates[k] = childCoordinates[j];
-	      }
-	    }
-	    return coordinates
+	  context.layers = function () {
+	    return _map.layers();
 	  };
-	  GeometryCollection.prototype.getArea = function getArea () {
-	    var this$1 = this;
 
-	    var area = 0.0;
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      area += this$1._geometries[i].getArea();
-	    }
-	    return area
+	  context.surface = function () {
+	    return _map.surface;
 	  };
-	  GeometryCollection.prototype.equalsExact = function equalsExact () {
-	    var this$1 = this;
 
-	    if (arguments.length === 2) {
-	      var other = arguments[0];
-	      var tolerance = arguments[1];
-	      if (!this.isEquivalentClass(other)) {
-	        return false
-	      }
-	      var otherCollection = other;
-	      if (this._geometries.length !== otherCollection._geometries.length) {
-	        return false
-	      }
-	      for (var i = 0; i < this._geometries.length; i++) {
-	        if (!this$1._geometries[i].equalsExact(otherCollection._geometries[i], tolerance)) {
-	          return false
-	        }
-	      }
-	      return true
-	    } else { return Geometry$$1.prototype.equalsExact.apply(this, arguments) }
+	  context.editableDataEnabled = function () {
+	    return _map.editableDataEnabled();
 	  };
-	  GeometryCollection.prototype.normalize = function normalize () {
-	    var this$1 = this;
 
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      this$1._geometries[i].normalize();
-	    }
-	    Arrays.sort(this._geometries);
+	  context.surfaceRect = function () {
+	    return _map.surface.node().getBoundingClientRect();
 	  };
-	  GeometryCollection.prototype.getCoordinate = function getCoordinate () {
-	    if (this.isEmpty()) { return null }
-	    return this._geometries[0].getCoordinate()
-	  };
-	  GeometryCollection.prototype.getBoundaryDimension = function getBoundaryDimension () {
-	    var this$1 = this;
 
-	    var dimension = Dimension.FALSE;
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      dimension = Math.max(dimension, this$1._geometries[i].getBoundaryDimension());
-	    }
-	    return dimension
+	  context.editable = function () {
+	    // don't allow editing during save
+	    var mode = context.mode();
+	    if (!mode || mode.id === 'save') return false;
+	    return _map.editableDataEnabled();
 	  };
-	  GeometryCollection.prototype.getDimension = function getDimension () {
-	    var this$1 = this;
+	  /* Debug */
+
+
+	  var _debugFlags = {
+	    tile: false,
+	    // tile boundaries
+	    collision: false,
+	    // label collision bounding boxes
+	    imagery: false,
+	    // imagery bounding polygons
+	    target: false,
+	    // touch targets
+	    downloaded: false // downloaded data from osm
 
-	    var dimension = Dimension.FALSE;
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      dimension = Math.max(dimension, this$1._geometries[i].getDimension());
-	    }
-	    return dimension
 	  };
-	  GeometryCollection.prototype.getLength = function getLength () {
-	    var this$1 = this;
 
-	    var sum = 0.0;
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      sum += this$1._geometries[i].getLength();
-	    }
-	    return sum
+	  context.debugFlags = function () {
+	    return _debugFlags;
 	  };
-	  GeometryCollection.prototype.getNumPoints = function getNumPoints () {
-	    var this$1 = this;
 
-	    var numPoints = 0;
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      numPoints += this$1._geometries[i].getNumPoints();
-	    }
-	    return numPoints
+	  context.getDebug = function (flag) {
+	    return flag && _debugFlags[flag];
 	  };
-	  GeometryCollection.prototype.getNumGeometries = function getNumGeometries () {
-	    return this._geometries.length
+
+	  context.setDebug = function (flag, val) {
+	    if (arguments.length === 1) val = true;
+	    _debugFlags[flag] = val;
+	    dispatch.call('change');
+	    return context;
 	  };
-	  GeometryCollection.prototype.reverse = function reverse () {
-	    var this$1 = this;
+	  /* Container */
 
-	    var n = this._geometries.length;
-	    var revGeoms = new Array(n).fill(null);
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      revGeoms[i] = this$1._geometries[i].reverse();
-	    }
-	    return this.getFactory().createGeometryCollection(revGeoms)
+
+	  var _container = select(null);
+
+	  context.container = function (val) {
+	    if (!arguments.length) return _container;
+	    _container = val;
+
+	    _container.classed('ideditor', true);
+
+	    return context;
 	  };
-	  GeometryCollection.prototype.compareToSameClass = function compareToSameClass () {
-	    var this$1 = this;
 
-	    if (arguments.length === 1) {
-	      var o = arguments[0];
-	      var theseElements = new TreeSet(Arrays.asList(this._geometries));
-	      var otherElements = new TreeSet(Arrays.asList(o._geometries));
-	      return this.compare(theseElements, otherElements)
-	    } else if (arguments.length === 2) {
-	      var o$1 = arguments[0];
-	      var comp = arguments[1];
-	      var gc = o$1;
-	      var n1 = this.getNumGeometries();
-	      var n2 = gc.getNumGeometries();
-	      var i = 0;
-	      while (i < n1 && i < n2) {
-	        var thisGeom = this$1.getGeometryN(i);
-	        var otherGeom = gc.getGeometryN(i);
-	        var holeComp = thisGeom.compareToSameClass(otherGeom, comp);
-	        if (holeComp !== 0) { return holeComp }
-	        i++;
-	      }
-	      if (i < n1) { return 1 }
-	      if (i < n2) { return -1 }
-	      return 0
-	    }
+	  context.containerNode = function (val) {
+	    if (!arguments.length) return context.container().node();
+	    context.container(select(val));
+	    return context;
 	  };
-	  GeometryCollection.prototype.apply = function apply () {
-	    var this$1 = this;
 
-	    if (hasInterface(arguments[0], CoordinateFilter)) {
-	      var filter = arguments[0];
-	      for (var i = 0; i < this._geometries.length; i++) {
-	        this$1._geometries[i].apply(filter);
-	      }
-	    } else if (hasInterface(arguments[0], CoordinateSequenceFilter)) {
-	      var filter$1 = arguments[0];
-	      if (this._geometries.length === 0) { return null }
-	      for (var i$1 = 0; i$1 < this._geometries.length; i$1++) {
-	        this$1._geometries[i$1].apply(filter$1);
-	        if (filter$1.isDone()) {
-	          break
-	        }
-	      }
-	      if (filter$1.isGeometryChanged()) { this.geometryChanged(); }
-	    } else if (hasInterface(arguments[0], GeometryFilter)) {
-	      var filter$2 = arguments[0];
-	      filter$2.filter(this);
-	      for (var i$2 = 0; i$2 < this._geometries.length; i$2++) {
-	        this$1._geometries[i$2].apply(filter$2);
-	      }
-	    } else if (hasInterface(arguments[0], GeometryComponentFilter)) {
-	      var filter$3 = arguments[0];
-	      filter$3.filter(this);
-	      for (var i$3 = 0; i$3 < this._geometries.length; i$3++) {
-	        this$1._geometries[i$3].apply(filter$3);
-	      }
-	    }
+	  var _embed;
+
+	  context.embed = function (val) {
+	    if (!arguments.length) return _embed;
+	    _embed = val;
+	    return context;
 	  };
-	  GeometryCollection.prototype.getBoundary = function getBoundary () {
-	    this.checkNotGeometryCollection(this);
-	    Assert.shouldNeverReachHere();
-	    return null
+	  /* Assets */
+
+
+	  var _assetPath = '';
+
+	  context.assetPath = function (val) {
+	    if (!arguments.length) return _assetPath;
+	    _assetPath = val;
+	    _mainFileFetcher.assetPath(val);
+	    return context;
 	  };
-	  GeometryCollection.prototype.clone = function clone () {
-	    var this$1 = this;
 
-	    var gc = Geometry$$1.prototype.clone.call(this);
-	    gc._geometries = new Array(this._geometries.length).fill(null);
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      gc._geometries[i] = this$1._geometries[i].clone();
-	    }
-	    return gc
+	  var _assetMap = {};
+
+	  context.assetMap = function (val) {
+	    if (!arguments.length) return _assetMap;
+	    _assetMap = val;
+	    _mainFileFetcher.assetMap(val);
+	    return context;
 	  };
-	  GeometryCollection.prototype.getGeometryType = function getGeometryType () {
-	    return 'GeometryCollection'
+
+	  context.asset = function (val) {
+	    if (/^http(s)?:\/\//i.test(val)) return val;
+	    var filename = _assetPath + val;
+	    return _assetMap[filename] || filename;
 	  };
-	  GeometryCollection.prototype.copy = function copy () {
-	    var this$1 = this;
 
-	    var geometries = new Array(this._geometries.length).fill(null);
-	    for (var i = 0; i < geometries.length; i++) {
-	      geometries[i] = this$1._geometries[i].copy();
-	    }
-	    return new GeometryCollection(geometries, this._factory)
+	  context.imagePath = function (val) {
+	    return context.asset("img/".concat(val));
 	  };
-	  GeometryCollection.prototype.isEmpty = function isEmpty () {
-	    var this$1 = this;
+	  /* reset (aka flush) */
+
+
+	  context.reset = context.flush = function () {
+	    context.debouncedSave.cancel();
+	    Array.from(_deferred).forEach(function (handle) {
+	      window.cancelIdleCallback(handle);
 
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      if (!this$1._geometries[i].isEmpty()) {
-	        return false
+	      _deferred["delete"](handle);
+	    });
+	    Object.values(services).forEach(function (service) {
+	      if (service && typeof service.reset === 'function') {
+	        service.reset(context);
 	      }
-	    }
-	    return true
-	  };
-	  GeometryCollection.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  GeometryCollection.prototype.getClass = function getClass () {
-	    return GeometryCollection
-	  };
-	  staticAccessors.serialVersionUID.get = function () { return -5694727726395021467 };
+	    });
+	    context.changeset = null;
 
-	  Object.defineProperties( GeometryCollection, staticAccessors );
+	    _validator.reset();
 
-	  return GeometryCollection;
-	}(Geometry));
+	    _features.reset();
 
-	var MultiLineString = (function (GeometryCollection$$1) {
-	  function MultiLineString () {
-	    GeometryCollection$$1.apply(this, arguments);
-	  }
+	    _history.reset();
 
-	  if ( GeometryCollection$$1 ) { MultiLineString.__proto__ = GeometryCollection$$1; }
-	  MultiLineString.prototype = Object.create( GeometryCollection$$1 && GeometryCollection$$1.prototype );
-	  MultiLineString.prototype.constructor = MultiLineString;
+	    _uploader.reset(); // don't leave stale state in the inspector
 
-	  var staticAccessors = { serialVersionUID: { configurable: true } };
 
-	  MultiLineString.prototype.getSortIndex = function getSortIndex () {
-	    return Geometry.SORTINDEX_MULTILINESTRING
+	    context.container().select('.inspector-wrap *').remove();
+	    return context;
 	  };
-	  MultiLineString.prototype.equalsExact = function equalsExact () {
-	    if (arguments.length === 2) {
-	      var other = arguments[0];
-	      var tolerance = arguments[1];
-	      if (!this.isEquivalentClass(other)) {
-	        return false
+	  /* Projections */
+
+
+	  context.projection = geoRawMercator();
+	  context.curtainProjection = geoRawMercator();
+	  /* Init */
+
+	  context.init = function () {
+	    instantiateInternal();
+	    initializeDependents();
+	    return context; // Load variables and properties. No property of `context` should be accessed
+	    // until this is complete since load statuses are indeterminate. The order
+	    // of instantiation shouldn't matter.
+
+	    function instantiateInternal() {
+	      _history = coreHistory(context);
+	      context.graph = _history.graph;
+	      context.pauseChangeDispatch = _history.pauseChangeDispatch;
+	      context.resumeChangeDispatch = _history.resumeChangeDispatch;
+	      context.perform = withDebouncedSave(_history.perform);
+	      context.replace = withDebouncedSave(_history.replace);
+	      context.pop = withDebouncedSave(_history.pop);
+	      context.overwrite = withDebouncedSave(_history.overwrite);
+	      context.undo = withDebouncedSave(_history.undo);
+	      context.redo = withDebouncedSave(_history.redo);
+	      _validator = coreValidator(context);
+	      _uploader = coreUploader(context);
+	      _background = rendererBackground(context);
+	      _features = rendererFeatures(context);
+	      _map = rendererMap(context);
+	      _photos = rendererPhotos(context);
+	      _ui = uiInit(context);
+	    } // Set up objects that might need to access properties of `context`. The order
+	    // might matter if dependents make calls to each other. Be wary of async calls.
+
+
+	    function initializeDependents() {
+	      if (context.initialHashParams.presets) {
+	        _mainPresetIndex.addablePresetIDs(new Set(context.initialHashParams.presets.split(',')));
 	      }
-	      return GeometryCollection$$1.prototype.equalsExact.call(this, other, tolerance)
-	    } else { return GeometryCollection$$1.prototype.equalsExact.apply(this, arguments) }
-	  };
-	  MultiLineString.prototype.getBoundaryDimension = function getBoundaryDimension () {
-	    if (this.isClosed()) {
-	      return Dimension.FALSE
-	    }
-	    return 0
-	  };
-	  MultiLineString.prototype.isClosed = function isClosed () {
-	    var this$1 = this;
 
-	    if (this.isEmpty()) {
-	      return false
-	    }
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      if (!this$1._geometries[i].isClosed()) {
-	        return false
+	      if (context.initialHashParams.locale) {
+	        _mainLocalizer.preferredLocaleCodes(context.initialHashParams.locale);
+	      } // kick off some async work
+
+
+	      _mainLocalizer.ensureLoaded();
+
+	      _background.ensureLoaded();
+
+	      _mainPresetIndex.ensureLoaded();
+	      Object.values(services).forEach(function (service) {
+	        if (service && typeof service.init === 'function') {
+	          service.init();
+	        }
+	      });
+
+	      _map.init();
+
+	      _validator.init();
+
+	      _features.init();
+
+	      if (services.maprules && context.initialHashParams.maprules) {
+	        d3_json(context.initialHashParams.maprules).then(function (mapcss) {
+	          services.maprules.init();
+	          mapcss.forEach(function (mapcssSelector) {
+	            return services.maprules.addRule(mapcssSelector);
+	          });
+	        })["catch"](function () {
+	          /* ignore */
+	        });
+	      } // if the container isn't available, e.g. when testing, don't load the UI
+
+
+	      if (!context.container().empty()) {
+	        _ui.ensureLoaded().then(function () {
+	          _photos.init();
+	        });
 	      }
 	    }
-	    return true
-	  };
-	  MultiLineString.prototype.getDimension = function getDimension () {
-	    return 1
 	  };
-	  MultiLineString.prototype.reverse = function reverse () {
-	    var this$1 = this;
 
-	    var nLines = this._geometries.length;
-	    var revLines = new Array(nLines).fill(null);
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      revLines[nLines - 1 - i] = this$1._geometries[i].reverse();
-	    }
-	    return this.getFactory().createMultiLineString(revLines)
-	  };
-	  MultiLineString.prototype.getBoundary = function getBoundary () {
-	    return new BoundaryOp(this).getBoundary()
-	  };
-	  MultiLineString.prototype.getGeometryType = function getGeometryType () {
-	    return 'MultiLineString'
-	  };
-	  MultiLineString.prototype.copy = function copy () {
-	    var this$1 = this;
+	  return context;
+	}
 
-	    var lineStrings = new Array(this._geometries.length).fill(null);
-	    for (var i = 0; i < lineStrings.length; i++) {
-	      lineStrings[i] = this$1._geometries[i].copy();
-	    }
-	    return new MultiLineString(lineStrings, this._factory)
-	  };
-	  MultiLineString.prototype.interfaces_ = function interfaces_ () {
-	    return [Lineal]
-	  };
-	  MultiLineString.prototype.getClass = function getClass () {
-	    return MultiLineString
-	  };
-	  staticAccessors.serialVersionUID.get = function () { return 8166665132445433741 };
+	// NSI contains the most correct tagging for many commonly mapped features.
+	// See https://github.com/osmlab/name-suggestion-index  and  https://nsi.guide
+	// DATA
 
-	  Object.defineProperties( MultiLineString, staticAccessors );
+	var _nsiStatus = 'loading'; // 'loading', 'ok', 'failed'
 
-	  return MultiLineString;
-	}(GeometryCollection));
+	var _nsi = {}; // Sometimes we can upgrade a feature tagged like `building=yes` to a better tag.
 
-	var BoundaryOp = function BoundaryOp () {
-	  this._geom = null;
-	  this._geomFact = null;
-	  this._bnRule = null;
-	  this._endpointMap = null;
-	  if (arguments.length === 1) {
-	    var geom = arguments[0];
-	    var bnRule = BoundaryNodeRule.MOD2_BOUNDARY_RULE;
-	    this._geom = geom;
-	    this._geomFact = geom.getFactory();
-	    this._bnRule = bnRule;
-	  } else if (arguments.length === 2) {
-	    var geom$1 = arguments[0];
-	    var bnRule$1 = arguments[1];
-	    this._geom = geom$1;
-	    this._geomFact = geom$1.getFactory();
-	    this._bnRule = bnRule$1;
-	  }
-	};
-	BoundaryOp.prototype.boundaryMultiLineString = function boundaryMultiLineString (mLine) {
-	  if (this._geom.isEmpty()) {
-	    return this.getEmptyMultiPoint()
-	  }
-	  var bdyPts = this.computeBoundaryCoordinates(mLine);
-	  if (bdyPts.length === 1) {
-	    return this._geomFact.createPoint(bdyPts[0])
-	  }
-	  return this._geomFact.createMultiPointFromCoords(bdyPts)
-	};
-	BoundaryOp.prototype.getBoundary = function getBoundary () {
-	  if (this._geom instanceof LineString) { return this.boundaryLineString(this._geom) }
-	  if (this._geom instanceof MultiLineString) { return this.boundaryMultiLineString(this._geom) }
-	  return this._geom.getBoundary()
-	};
-	BoundaryOp.prototype.boundaryLineString = function boundaryLineString (line) {
-	  if (this._geom.isEmpty()) {
-	    return this.getEmptyMultiPoint()
-	  }
-	  if (line.isClosed()) {
-	    var closedEndpointOnBoundary = this._bnRule.isInBoundary(2);
-	    if (closedEndpointOnBoundary) {
-	      return line.getStartPoint()
-	    } else {
-	      return this._geomFact.createMultiPoint()
-	    }
-	  }
-	  return this._geomFact.createMultiPoint([line.getStartPoint(), line.getEndPoint()])
-	};
-	BoundaryOp.prototype.getEmptyMultiPoint = function getEmptyMultiPoint () {
-	  return this._geomFact.createMultiPoint()
-	};
-	BoundaryOp.prototype.computeBoundaryCoordinates = function computeBoundaryCoordinates (mLine) {
-	    var this$1 = this;
-
-	  var bdyPts = new ArrayList();
-	  this._endpointMap = new TreeMap();
-	  for (var i = 0; i < mLine.getNumGeometries(); i++) {
-	    var line = mLine.getGeometryN(i);
-	    if (line.getNumPoints() === 0) { continue }
-	    this$1.addEndpoint(line.getCoordinateN(0));
-	    this$1.addEndpoint(line.getCoordinateN(line.getNumPoints() - 1));
-	  }
-	  for (var it = this._endpointMap.entrySet().iterator(); it.hasNext();) {
-	    var entry = it.next();
-	    var counter = entry.getValue();
-	    var valence = counter.count;
-	    if (this$1._bnRule.isInBoundary(valence)) {
-	      bdyPts.add(entry.getKey());
-	    }
-	  }
-	  return CoordinateArrays.toCoordinateArray(bdyPts)
-	};
-	BoundaryOp.prototype.addEndpoint = function addEndpoint (pt) {
-	  var counter = this._endpointMap.get(pt);
-	  if (counter === null) {
-	    counter = new Counter();
-	    this._endpointMap.put(pt, counter);
-	  }
-	  counter.count++;
-	};
-	BoundaryOp.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BoundaryOp.prototype.getClass = function getClass () {
-	  return BoundaryOp
-	};
-	BoundaryOp.getBoundary = function getBoundary () {
-	  if (arguments.length === 1) {
-	    var g = arguments[0];
-	    var bop = new BoundaryOp(g);
-	    return bop.getBoundary()
-	  } else if (arguments.length === 2) {
-	    var g$1 = arguments[0];
-	    var bnRule = arguments[1];
-	    var bop$1 = new BoundaryOp(g$1, bnRule);
-	    return bop$1.getBoundary()
-	  }
-	};
+	var buildingPreset = {
+	  'building/commercial': true,
+	  'building/government': true,
+	  'building/hotel': true,
+	  'building/retail': true,
+	  'building/office': true,
+	  'building/supermarket': true,
+	  'building/yes': true
+	}; // Exceptions to the namelike regexes.
+	// Usually a tag suffix contains a language code like `name:en`, `name:ru`
+	// but we want to exclude things like `operator:type`, `name:etymology`, etc..
 
-	var Counter = function Counter () {
-	  this.count = null;
-	};
-	Counter.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Counter.prototype.getClass = function getClass () {
-	  return Counter
-	};
+	var notNames = /:(colou?r|type|forward|backward|left|right|etymology|pronunciation|wikipedia)$/i; // Exceptions to the branchlike regexes
 
-	// boundary
+	var notBranches = /(coop|express|wireless|factory|outlet)/i; // PRIVATE FUNCTIONS
+	// `setNsiSources()`
+	// Adds the sources to iD's filemap so we can start downloading data.
+	//
 
-	function PrintStream () {}
+	function setNsiSources() {
+	  var nsiVersion = packageJSON.devDependencies['name-suggestion-index'];
+	  var v = parseVersion(nsiVersion);
+	  var vMinor = "".concat(v.major, ".").concat(v.minor);
+	  var sources = {
+	    'nsi_data': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/nsi.min.json"),
+	    'nsi_dissolved': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/dissolved.min.json"),
+	    'nsi_features': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/featureCollection.min.json"),
+	    'nsi_generics': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/genericWords.min.json"),
+	    'nsi_presets': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/presets/nsi-id-presets.min.json"),
+	    'nsi_replacements': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/replacements.min.json"),
+	    'nsi_trees': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/trees.min.json")
+	  };
+	  var fileMap = _mainFileFetcher.fileMap();
+
+	  for (var k in sources) {
+	    if (!fileMap[k]) fileMap[k] = sources[k];
+	  }
+	} // `loadNsiPresets()`
+	//  Returns a Promise fulfilled when the presets have been downloaded and merged into iD.
+	//
 
-	function StringReader () {}
 
-	var DecimalFormat = function DecimalFormat () {};
+	function loadNsiPresets() {
+	  return Promise.all([_mainFileFetcher.get('nsi_presets'), _mainFileFetcher.get('nsi_features')]).then(function (vals) {
+	    // Add `suggestion=true` to all the nsi presets
+	    // The preset json schema doesn't include it, but the iD code still uses it
+	    Object.values(vals[0].presets).forEach(function (preset) {
+	      return preset.suggestion = true;
+	    });
+	    _mainPresetIndex.merge({
+	      presets: vals[0].presets,
+	      featureCollection: vals[1]
+	    });
+	  });
+	} // `loadNsiData()`
+	//  Returns a Promise fulfilled when the other data have been downloaded and processed
+	//
 
-	function ByteArrayOutputStream () {}
 
-	function IOException () {}
+	function loadNsiData() {
+	  return Promise.all([_mainFileFetcher.get('nsi_data'), _mainFileFetcher.get('nsi_dissolved'), _mainFileFetcher.get('nsi_replacements'), _mainFileFetcher.get('nsi_trees')]).then(function (vals) {
+	    _nsi = {
+	      data: vals[0].nsi,
+	      // the raw name-suggestion-index data
+	      dissolved: vals[1].dissolved,
+	      // list of dissolved items
+	      replacements: vals[2].replacements,
+	      // trivial old->new qid replacements
+	      trees: vals[3].trees,
+	      // metadata about trees, main tags
+	      kvt: new Map(),
+	      // Map (k -> Map (v -> t) )
+	      qids: new Map(),
+	      // Map (wd/wp tag values -> qids)
+	      ids: new Map() // Map (id -> NSI item)
 
-	function LineNumberReader () {}
+	    };
+	    _nsi.matcher = new Matcher();
 
-	var StringUtil = function StringUtil () {};
+	    _nsi.matcher.buildMatchIndex(_nsi.data);
 
-	var staticAccessors$15 = { NEWLINE: { configurable: true },SIMPLE_ORDINATE_FORMAT: { configurable: true } };
+	    _nsi.matcher.buildLocationIndex(_nsi.data, _mainLocations.loco());
 
-	StringUtil.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	StringUtil.prototype.getClass = function getClass () {
-	  return StringUtil
-	};
-	StringUtil.chars = function chars (c, n) {
-	  var ch = new Array(n).fill(null);
-	  for (var i = 0; i < n; i++) {
-	    ch[i] = c;
-	  }
-	  return String(ch)
-	};
-	StringUtil.getStackTrace = function getStackTrace () {
-	  if (arguments.length === 1) {
-	    var t = arguments[0];
-	    var os = new ByteArrayOutputStream();
-	    var ps = new PrintStream(os);
-	    t.printStackTrace(ps);
-	    return os.toString()
-	  } else if (arguments.length === 2) {
-	    var t$1 = arguments[0];
-	    var depth = arguments[1];
-	    var stackTrace = '';
-	    var stringReader = new StringReader(StringUtil.getStackTrace(t$1));
-	    var lineNumberReader = new LineNumberReader(stringReader);
-	    for (var i = 0; i < depth; i++) {
-	      try {
-	        stackTrace += lineNumberReader.readLine() + StringUtil.NEWLINE;
-	      } catch (e) {
-	        if (e instanceof IOException) {
-	          Assert.shouldNeverReachHere();
-	        } else { throw e }
-	      } finally {}
-	    }
-	    return stackTrace
-	  }
-	};
-	StringUtil.split = function split (s, separator) {
-	  var separatorlen = separator.length;
-	  var tokenList = new ArrayList();
-	  var tmpString = '' + s;
-	  var pos = tmpString.indexOf(separator);
-	  while (pos >= 0) {
-	    var token = tmpString.substring(0, pos);
-	    tokenList.add(token);
-	    tmpString = tmpString.substring(pos + separatorlen);
-	    pos = tmpString.indexOf(separator);
-	  }
-	  if (tmpString.length > 0) { tokenList.add(tmpString); }
-	  var res = new Array(tokenList.size()).fill(null);
-	  for (var i = 0; i < res.length; i++) {
-	    res[i] = tokenList.get(i);
-	  }
-	  return res
-	};
-	StringUtil.toString = function toString () {
-	  if (arguments.length === 1) {
-	    var d = arguments[0];
-	    return StringUtil.SIMPLE_ORDINATE_FORMAT.format(d)
-	  }
-	};
-	StringUtil.spaces = function spaces (n) {
-	  return StringUtil.chars(' ', n)
-	};
-	staticAccessors$15.NEWLINE.get = function () { return System.getProperty('line.separator') };
-	staticAccessors$15.SIMPLE_ORDINATE_FORMAT.get = function () { return new DecimalFormat('0.#') };
+	    Object.keys(_nsi.data).forEach(function (tkv) {
+	      var category = _nsi.data[tkv];
+	      var parts = tkv.split('/', 3); // tkv = "tree/key/value"
 
-	Object.defineProperties( StringUtil, staticAccessors$15 );
+	      var t = parts[0];
+	      var k = parts[1];
+	      var v = parts[2]; // Build a reverse index of keys -> values -> trees present in the name-suggestion-index
+	      // Collect primary keys  (e.g. "amenity", "craft", "shop", "man_made", "route", etc)
+	      // "amenity": {
+	      //   "restaurant": "brands"
+	      // }
 
-	var CoordinateSequences = function CoordinateSequences () {};
+	      var vmap = _nsi.kvt.get(k);
 
-	CoordinateSequences.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CoordinateSequences.prototype.getClass = function getClass () {
-	  return CoordinateSequences
-	};
-	CoordinateSequences.copyCoord = function copyCoord (src, srcPos, dest, destPos) {
-	  var minDim = Math.min(src.getDimension(), dest.getDimension());
-	  for (var dim = 0; dim < minDim; dim++) {
-	    dest.setOrdinate(destPos, dim, src.getOrdinate(srcPos, dim));
-	  }
-	};
-	CoordinateSequences.isRing = function isRing (seq) {
-	  var n = seq.size();
-	  if (n === 0) { return true }
-	  if (n <= 3) { return false }
-	  return seq.getOrdinate(0, CoordinateSequence.X) === seq.getOrdinate(n - 1, CoordinateSequence.X) && seq.getOrdinate(0, CoordinateSequence.Y) === seq.getOrdinate(n - 1, CoordinateSequence.Y)
-	};
-	CoordinateSequences.isEqual = function isEqual (cs1, cs2) {
-	  var cs1Size = cs1.size();
-	  var cs2Size = cs2.size();
-	  if (cs1Size !== cs2Size) { return false }
-	  var dim = Math.min(cs1.getDimension(), cs2.getDimension());
-	  for (var i = 0; i < cs1Size; i++) {
-	    for (var d = 0; d < dim; d++) {
-	      var v1 = cs1.getOrdinate(i, d);
-	      var v2 = cs2.getOrdinate(i, d);
-	      if (cs1.getOrdinate(i, d) === cs2.getOrdinate(i, d)) { continue }
-	      if (Double.isNaN(v1) && Double.isNaN(v2)) { continue }
-	      return false
-	    }
-	  }
-	  return true
-	};
-	CoordinateSequences.extend = function extend (fact, seq, size) {
-	  var newseq = fact.create(size, seq.getDimension());
-	  var n = seq.size();
-	  CoordinateSequences.copy(seq, 0, newseq, 0, n);
-	  if (n > 0) {
-	    for (var i = n; i < size; i++) { CoordinateSequences.copy(seq, n - 1, newseq, i, 1); }
-	  }
-	  return newseq
-	};
-	CoordinateSequences.reverse = function reverse (seq) {
-	  var last = seq.size() - 1;
-	  var mid = Math.trunc(last / 2);
-	  for (var i = 0; i <= mid; i++) {
-	    CoordinateSequences.swap(seq, i, last - i);
-	  }
-	};
-	CoordinateSequences.swap = function swap (seq, i, j) {
-	  if (i === j) { return null }
-	  for (var dim = 0; dim < seq.getDimension(); dim++) {
-	    var tmp = seq.getOrdinate(i, dim);
-	    seq.setOrdinate(i, dim, seq.getOrdinate(j, dim));
-	    seq.setOrdinate(j, dim, tmp);
-	  }
-	};
-	CoordinateSequences.copy = function copy (src, srcPos, dest, destPos, length) {
-	  for (var i = 0; i < length; i++) {
-	    CoordinateSequences.copyCoord(src, srcPos + i, dest, destPos + i);
-	  }
-	};
-	CoordinateSequences.toString = function toString () {
-	  if (arguments.length === 1) {
-	    var cs = arguments[0];
-	    var size = cs.size();
-	    if (size === 0) { return '()' }
-	    var dim = cs.getDimension();
-	    var buf = new StringBuffer();
-	    buf.append('(');
-	    for (var i = 0; i < size; i++) {
-	      if (i > 0) { buf.append(' '); }
-	      for (var d = 0; d < dim; d++) {
-	        if (d > 0) { buf.append(','); }
-	        buf.append(StringUtil.toString(cs.getOrdinate(i, d)));
-	      }
-	    }
-	    buf.append(')');
-	    return buf.toString()
-	  }
-	};
-	CoordinateSequences.ensureValidRing = function ensureValidRing (fact, seq) {
-	  var n = seq.size();
-	  if (n === 0) { return seq }
-	  if (n <= 3) { return CoordinateSequences.createClosedRing(fact, seq, 4) }
-	  var isClosed = seq.getOrdinate(0, CoordinateSequence.X) === seq.getOrdinate(n - 1, CoordinateSequence.X) && seq.getOrdinate(0, CoordinateSequence.Y) === seq.getOrdinate(n - 1, CoordinateSequence.Y);
-	  if (isClosed) { return seq }
-	  return CoordinateSequences.createClosedRing(fact, seq, n + 1)
-	};
-	CoordinateSequences.createClosedRing = function createClosedRing (fact, seq, size) {
-	  var newseq = fact.create(size, seq.getDimension());
-	  var n = seq.size();
-	  CoordinateSequences.copy(seq, 0, newseq, 0, n);
-	  for (var i = n; i < size; i++) { CoordinateSequences.copy(seq, 0, newseq, i, 1); }
-	  return newseq
-	};
+	      if (!vmap) {
+	        vmap = new Map();
 
-	var LineString = (function (Geometry$$1) {
-	  function LineString (points, factory) {
-	    Geometry$$1.call(this, factory);
-	    this._points = null;
-	    this.init(points);
-	  }
+	        _nsi.kvt.set(k, vmap);
+	      }
 
-	  if ( Geometry$$1 ) { LineString.__proto__ = Geometry$$1; }
-	  LineString.prototype = Object.create( Geometry$$1 && Geometry$$1.prototype );
-	  LineString.prototype.constructor = LineString;
+	      vmap.set(v, t);
+	      var tree = _nsi.trees[t]; // e.g. "brands", "operators"
 
-	  var staticAccessors = { serialVersionUID: { configurable: true } };
-	  LineString.prototype.computeEnvelopeInternal = function computeEnvelopeInternal () {
-	    if (this.isEmpty()) {
-	      return new Envelope()
-	    }
-	    return this._points.expandEnvelope(new Envelope())
-	  };
-	  LineString.prototype.isRing = function isRing () {
-	    return this.isClosed() && this.isSimple()
-	  };
-	  LineString.prototype.getSortIndex = function getSortIndex () {
-	    return Geometry$$1.SORTINDEX_LINESTRING
-	  };
-	  LineString.prototype.getCoordinates = function getCoordinates () {
-	    return this._points.toCoordinateArray()
-	  };
-	  LineString.prototype.equalsExact = function equalsExact () {
-	    var this$1 = this;
+	      var mainTag = tree.mainTag; // e.g. "brand:wikidata", "operator:wikidata", etc
 
-	    if (arguments.length === 2) {
-	      var other = arguments[0];
-	      var tolerance = arguments[1];
-	      if (!this.isEquivalentClass(other)) {
-	        return false
-	      }
-	      var otherLineString = other;
-	      if (this._points.size() !== otherLineString._points.size()) {
-	        return false
-	      }
-	      for (var i = 0; i < this._points.size(); i++) {
-	        if (!this$1.equal(this$1._points.getCoordinate(i), otherLineString._points.getCoordinate(i), tolerance)) {
-	          return false
-	        }
-	      }
-	      return true
-	    } else { return Geometry$$1.prototype.equalsExact.apply(this, arguments) }
-	  };
-	  LineString.prototype.normalize = function normalize () {
-	    var this$1 = this;
+	      var items = category.items || [];
+	      items.forEach(function (item) {
+	        // Remember some useful things for later, cache NSI id -> item
+	        item.tkv = tkv;
+	        item.mainTag = mainTag;
 
-	    for (var i = 0; i < Math.trunc(this._points.size() / 2); i++) {
-	      var j = this$1._points.size() - 1 - i;
-	      if (!this$1._points.getCoordinate(i).equals(this$1._points.getCoordinate(j))) {
-	        if (this$1._points.getCoordinate(i).compareTo(this$1._points.getCoordinate(j)) > 0) {
-	          CoordinateSequences.reverse(this$1._points);
-	        }
-	        return null
-	      }
-	    }
-	  };
-	  LineString.prototype.getCoordinate = function getCoordinate () {
-	    if (this.isEmpty()) { return null }
-	    return this._points.getCoordinate(0)
-	  };
-	  LineString.prototype.getBoundaryDimension = function getBoundaryDimension () {
-	    if (this.isClosed()) {
-	      return Dimension.FALSE
-	    }
-	    return 0
-	  };
-	  LineString.prototype.isClosed = function isClosed () {
-	    if (this.isEmpty()) {
-	      return false
-	    }
-	    return this.getCoordinateN(0).equals2D(this.getCoordinateN(this.getNumPoints() - 1))
-	  };
-	  LineString.prototype.getEndPoint = function getEndPoint () {
-	    if (this.isEmpty()) {
-	      return null
-	    }
-	    return this.getPointN(this.getNumPoints() - 1)
-	  };
-	  LineString.prototype.getDimension = function getDimension () {
-	    return 1
-	  };
-	  LineString.prototype.getLength = function getLength () {
-	    return CGAlgorithms.computeLength(this._points)
-	  };
-	  LineString.prototype.getNumPoints = function getNumPoints () {
-	    return this._points.size()
-	  };
-	  LineString.prototype.reverse = function reverse () {
-	    var seq = this._points.copy();
-	    CoordinateSequences.reverse(seq);
-	    var revLine = this.getFactory().createLineString(seq);
-	    return revLine
-	  };
-	  LineString.prototype.compareToSameClass = function compareToSameClass () {
-	    var this$1 = this;
+	        _nsi.ids.set(item.id, item); // Cache Wikidata/Wikipedia values -> qid, for #6416
 
-	    if (arguments.length === 1) {
-	      var o = arguments[0];
-	      var line = o;
-	      var i = 0;
-	      var j = 0;
-	      while (i < this._points.size() && j < line._points.size()) {
-	        var comparison = this$1._points.getCoordinate(i).compareTo(line._points.getCoordinate(j));
-	        if (comparison !== 0) {
-	          return comparison
-	        }
-	        i++;
-	        j++;
-	      }
-	      if (i < this._points.size()) {
-	        return 1
-	      }
-	      if (j < line._points.size()) {
-	        return -1
-	      }
-	      return 0
-	    } else if (arguments.length === 2) {
-	      var o$1 = arguments[0];
-	      var comp = arguments[1];
-	      var line$1 = o$1;
-	      return comp.compare(this._points, line$1._points)
-	    }
-	  };
-	  LineString.prototype.apply = function apply () {
-	    var this$1 = this;
 
-	    if (hasInterface(arguments[0], CoordinateFilter)) {
-	      var filter = arguments[0];
-	      for (var i = 0; i < this._points.size(); i++) {
-	        filter.filter(this$1._points.getCoordinate(i));
-	      }
-	    } else if (hasInterface(arguments[0], CoordinateSequenceFilter)) {
-	      var filter$1 = arguments[0];
-	      if (this._points.size() === 0) { return null }
-	      for (var i$1 = 0; i$1 < this._points.size(); i$1++) {
-	        filter$1.filter(this$1._points, i$1);
-	        if (filter$1.isDone()) { break }
-	      }
-	      if (filter$1.isGeometryChanged()) { this.geometryChanged(); }
-	    } else if (hasInterface(arguments[0], GeometryFilter)) {
-	      var filter$2 = arguments[0];
-	      filter$2.filter(this);
-	    } else if (hasInterface(arguments[0], GeometryComponentFilter)) {
-	      var filter$3 = arguments[0];
-	      filter$3.filter(this);
-	    }
-	  };
-	  LineString.prototype.getBoundary = function getBoundary () {
-	    return new BoundaryOp(this).getBoundary()
-	  };
-	  LineString.prototype.isEquivalentClass = function isEquivalentClass (other) {
-	    return other instanceof LineString
-	  };
-	  LineString.prototype.clone = function clone () {
-	    var ls = Geometry$$1.prototype.clone.call(this);
-	    ls._points = this._points.clone();
-	    return ls
-	  };
-	  LineString.prototype.getCoordinateN = function getCoordinateN (n) {
-	    return this._points.getCoordinate(n)
-	  };
-	  LineString.prototype.getGeometryType = function getGeometryType () {
-	    return 'LineString'
-	  };
-	  LineString.prototype.copy = function copy () {
-	    return new LineString(this._points.copy(), this._factory)
-	  };
-	  LineString.prototype.getCoordinateSequence = function getCoordinateSequence () {
-	    return this._points
-	  };
-	  LineString.prototype.isEmpty = function isEmpty () {
-	    return this._points.size() === 0
-	  };
-	  LineString.prototype.init = function init (points) {
-	    if (points === null) {
-	      points = this.getFactory().getCoordinateSequenceFactory().create([]);
-	    }
-	    if (points.size() === 1) {
-	      throw new IllegalArgumentException('Invalid number of points in LineString (found ' + points.size() + ' - must be 0 or >= 2)')
-	    }
-	    this._points = points;
-	  };
-	  LineString.prototype.isCoordinate = function isCoordinate (pt) {
-	    var this$1 = this;
+	        var wd = item.tags[mainTag];
+	        var wp = item.tags[mainTag.replace('wikidata', 'wikipedia')];
+	        if (wd) _nsi.qids.set(wd, wd);
+	        if (wp && wd) _nsi.qids.set(wp, wd);
+	      });
+	    });
+	  });
+	} // `gatherKVs()`
+	// Gather all the k/v pairs that we will run through the NSI matcher.
+	// An OSM tags object can contain anything, but only a few tags will be interesting to NSI.
+	//
+	// This function will return the interesting tag pairs like:
+	//   "amenity/restaurant", "man_made/flagpole"
+	// and fallbacks like
+	//   "amenity/yes"
+	// excluding things like
+	//   "tiger:reviewed", "surface", "ref", etc.
+	//
+	// Arguments
+	//   `tags`: `Object` containing the feature's OSM tags
+	// Returns
+	//   `Object` containing kv pairs to test:
+	//   {
+	//     'primary': Set(),
+	//     'alternate': Set()
+	//   }
+	//
 
-	    for (var i = 0; i < this._points.size(); i++) {
-	      if (this$1._points.getCoordinate(i).equals(pt)) {
-	        return true
-	      }
+
+	function gatherKVs(tags) {
+	  var primary = new Set();
+	  var alternate = new Set();
+	  Object.keys(tags).forEach(function (osmkey) {
+	    var osmvalue = tags[osmkey];
+	    if (!osmvalue) return; // Match a 'route_master' as if it were a 'route' - name-suggestion-index#5184
+
+	    if (osmkey === 'route_master') osmkey = 'route';
+
+	    var vmap = _nsi.kvt.get(osmkey);
+
+	    if (!vmap) return; // not an interesting key
+
+	    if (vmap.get(osmvalue)) {
+	      // Matched a category in NSI
+	      primary.add("".concat(osmkey, "/").concat(osmvalue)); // interesting key/value
+	    } else if (osmvalue === 'yes') {
+	      alternate.add("".concat(osmkey, "/").concat(osmvalue)); // fallback key/yes
 	    }
-	    return false
+	  }); // Can we try a generic building fallback match? - See #6122, #7197
+	  // Only try this if we do a preset match and find nothing else remarkable about that building.
+	  // For example, a way with `building=yes` + `name=Westfield` may be a Westfield department store.
+	  // But a way with `building=yes` + `name=Westfield` + `public_transport=station` is a train station for a town named "Westfield"
+
+	  var preset = _mainPresetIndex.matchTags(tags, 'area');
+
+	  if (buildingPreset[preset.id]) {
+	    alternate.add('building/yes');
+	  }
+
+	  return {
+	    primary: primary,
+	    alternate: alternate
 	  };
-	  LineString.prototype.getStartPoint = function getStartPoint () {
-	    if (this.isEmpty()) {
-	      return null
+	} // `identifyTree()`
+	// NSI has a concept of trees: "brands", "operators", "flags", "transit".
+	// The tree determines things like which tags are namelike, and which tags hold important wikidata.
+	// This takes an Object of tags and tries to identify what tree to use.
+	//
+	// Arguments
+	//   `tags`: `Object` containing the feature's OSM tags
+	// Returns
+	//   `string` the name of the tree if known
+	//   or 'unknown' if it could match several trees (e.g. amenity/yes)
+	//   or null if no match
+	//
+
+
+	function identifyTree(tags) {
+	  var unknown;
+	  var t; // Check all tags
+
+	  Object.keys(tags).forEach(function (osmkey) {
+	    if (t) return; // found already
+
+	    var osmvalue = tags[osmkey];
+	    if (!osmvalue) return; // Match a 'route_master' as if it were a 'route' - name-suggestion-index#5184
+
+	    if (osmkey === 'route_master') osmkey = 'route';
+
+	    var vmap = _nsi.kvt.get(osmkey);
+
+	    if (!vmap) return; // this key is not in nsi
+
+	    if (osmvalue === 'yes') {
+	      unknown = 'unknown';
+	    } else {
+	      t = vmap.get(osmvalue);
 	    }
-	    return this.getPointN(0)
-	  };
-	  LineString.prototype.getPointN = function getPointN (n) {
-	    return this.getFactory().createPoint(this._points.getCoordinate(n))
-	  };
-	  LineString.prototype.interfaces_ = function interfaces_ () {
-	    return [Lineal]
-	  };
-	  LineString.prototype.getClass = function getClass () {
-	    return LineString
+	  });
+	  return t || unknown || null;
+	} // `gatherNames()`
+	// Gather all the namelike values that we will run through the NSI matcher.
+	// It will gather values primarily from tags `name`, `name:ru`, `flag:name`
+	//  and fallback to alternate tags like `brand`, `brand:ru`, `alt_name`
+	//
+	// Arguments
+	//   `tags`: `Object` containing the feature's OSM tags
+	// Returns
+	//   `Object` containing namelike values to test:
+	//   {
+	//     'primary': Set(),
+	//     'fallbacks': Set()
+	//   }
+	//
+
+
+	function gatherNames(tags) {
+	  var empty = {
+	    primary: new Set(),
+	    alternate: new Set()
 	  };
-	  staticAccessors.serialVersionUID.get = function () { return 3110669828065365560 };
+	  var primary = new Set();
+	  var alternate = new Set();
+	  var foundSemi = false;
+	  var testNameFragments = false;
+	  var patterns; // Patterns for matching OSM keys that might contain namelike values.
+	  // These roughly correspond to the "trees" concept in name-suggestion-index,
 
-	  Object.defineProperties( LineString, staticAccessors );
+	  var t = identifyTree(tags);
+	  if (!t) return empty;
 
-	  return LineString;
-	}(Geometry));
+	  if (t === 'transit') {
+	    patterns = {
+	      primary: /^network$/i,
+	      alternate: /^(operator|operator:\w+|network:\w+|\w+_name|\w+_name:\w+)$/i
+	    };
+	  } else if (t === 'flags') {
+	    patterns = {
+	      primary: /^(flag:name|flag:name:\w+)$/i,
+	      alternate: /^(flag|flag:\w+|subject|subject:\w+)$/i // note: no `country`, we special-case it below
 
-	var Puntal = function Puntal () {};
+	    };
+	  } else if (t === 'brands') {
+	    testNameFragments = true;
+	    patterns = {
+	      primary: /^(name|name:\w+)$/i,
+	      alternate: /^(brand|brand:\w+|operator|operator:\w+|\w+_name|\w+_name:\w+)/i
+	    };
+	  } else if (t === 'operators') {
+	    testNameFragments = true;
+	    patterns = {
+	      primary: /^(name|name:\w+|operator|operator:\w+)$/i,
+	      alternate: /^(brand|brand:\w+|\w+_name|\w+_name:\w+)/i
+	    };
+	  } else {
+	    // unknown/multiple
+	    testNameFragments = true;
+	    patterns = {
+	      primary: /^(name|name:\w+)$/i,
+	      alternate: /^(brand|brand:\w+|network|network:\w+|operator|operator:\w+|\w+_name|\w+_name:\w+)/i
+	    };
+	  } // Test `name` fragments, longest to shortest, to fit them into a "Name Branch" pattern.
+	  // e.g. "TUI ReiseCenter - Neuss Innenstadt" -> ["TUI", "ReiseCenter", "Neuss", "Innenstadt"]
 
-	Puntal.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Puntal.prototype.getClass = function getClass () {
-	  return Puntal
-	};
 
-	var Point$1 = (function (Geometry$$1) {
-	  function Point (coordinates, factory) {
-	    Geometry$$1.call(this, factory);
-	    this._coordinates = coordinates || null;
-	    this.init(this._coordinates);
-	  }
+	  if (tags.name && testNameFragments) {
+	    var nameParts = tags.name.split(/[\s\-\/,.]/);
 
-	  if ( Geometry$$1 ) { Point.__proto__ = Geometry$$1; }
-	  Point.prototype = Object.create( Geometry$$1 && Geometry$$1.prototype );
-	  Point.prototype.constructor = Point;
+	    for (var split = nameParts.length; split > 0; split--) {
+	      var name = nameParts.slice(0, split).join(' '); // e.g. "TUI ReiseCenter"
 
-	  var staticAccessors = { serialVersionUID: { configurable: true } };
-	  Point.prototype.computeEnvelopeInternal = function computeEnvelopeInternal () {
-	    if (this.isEmpty()) {
-	      return new Envelope()
+	      primary.add(name);
 	    }
-	    var env = new Envelope();
-	    env.expandToInclude(this._coordinates.getX(0), this._coordinates.getY(0));
-	    return env
-	  };
-	  Point.prototype.getSortIndex = function getSortIndex () {
-	    return Geometry$$1.SORTINDEX_POINT
-	  };
-	  Point.prototype.getCoordinates = function getCoordinates () {
-	    return this.isEmpty() ? [] : [this.getCoordinate()]
-	  };
-	  Point.prototype.equalsExact = function equalsExact () {
-	    if (arguments.length === 2) {
-	      var other = arguments[0];
-	      var tolerance = arguments[1];
-	      if (!this.isEquivalentClass(other)) {
-	        return false
-	      }
-	      if (this.isEmpty() && other.isEmpty()) {
-	        return true
-	      }
-	      if (this.isEmpty() !== other.isEmpty()) {
-	        return false
+	  } // Check all tags
+
+
+	  Object.keys(tags).forEach(function (osmkey) {
+	    var osmvalue = tags[osmkey];
+	    if (!osmvalue) return;
+
+	    if (isNamelike(osmkey, 'primary')) {
+	      if (/;/.test(osmvalue)) {
+	        foundSemi = true;
+	      } else {
+	        primary.add(osmvalue);
+	        alternate["delete"](osmvalue);
 	      }
-	      return this.equal(other.getCoordinate(), this.getCoordinate(), tolerance)
-	    } else { return Geometry$$1.prototype.equalsExact.apply(this, arguments) }
-	  };
-	  Point.prototype.normalize = function normalize () {};
-	  Point.prototype.getCoordinate = function getCoordinate () {
-	    return this._coordinates.size() !== 0 ? this._coordinates.getCoordinate(0) : null
-	  };
-	  Point.prototype.getBoundaryDimension = function getBoundaryDimension () {
-	    return Dimension.FALSE
-	  };
-	  Point.prototype.getDimension = function getDimension () {
-	    return 0
-	  };
-	  Point.prototype.getNumPoints = function getNumPoints () {
-	    return this.isEmpty() ? 0 : 1
-	  };
-	  Point.prototype.reverse = function reverse () {
-	    return this.copy()
-	  };
-	  Point.prototype.getX = function getX () {
-	    if (this.getCoordinate() === null) {
-	      throw new Error('getX called on empty Point')
-	    }
-	    return this.getCoordinate().x
-	  };
-	  Point.prototype.compareToSameClass = function compareToSameClass () {
-	    if (arguments.length === 1) {
-	      var other = arguments[0];
-	      var point$1 = other;
-	      return this.getCoordinate().compareTo(point$1.getCoordinate())
-	    } else if (arguments.length === 2) {
-	      var other$1 = arguments[0];
-	      var comp = arguments[1];
-	      var point = other$1;
-	      return comp.compare(this._coordinates, point._coordinates)
-	    }
-	  };
-	  Point.prototype.apply = function apply () {
-	    if (hasInterface(arguments[0], CoordinateFilter)) {
-	      var filter = arguments[0];
-	      if (this.isEmpty()) {
-	        return null
+	    } else if (!primary.has(osmvalue) && isNamelike(osmkey, 'alternate')) {
+	      if (/;/.test(osmvalue)) {
+	        foundSemi = true;
+	      } else {
+	        alternate.add(osmvalue);
 	      }
-	      filter.filter(this.getCoordinate());
-	    } else if (hasInterface(arguments[0], CoordinateSequenceFilter)) {
-	      var filter$1 = arguments[0];
-	      if (this.isEmpty()) { return null }
-	      filter$1.filter(this._coordinates, 0);
-	      if (filter$1.isGeometryChanged()) { this.geometryChanged(); }
-	    } else if (hasInterface(arguments[0], GeometryFilter)) {
-	      var filter$2 = arguments[0];
-	      filter$2.filter(this);
-	    } else if (hasInterface(arguments[0], GeometryComponentFilter)) {
-	      var filter$3 = arguments[0];
-	      filter$3.filter(this);
-	    }
-	  };
-	  Point.prototype.getBoundary = function getBoundary () {
-	    return this.getFactory().createGeometryCollection(null)
-	  };
-	  Point.prototype.clone = function clone () {
-	    var p = Geometry$$1.prototype.clone.call(this);
-	    p._coordinates = this._coordinates.clone();
-	    return p
-	  };
-	  Point.prototype.getGeometryType = function getGeometryType () {
-	    return 'Point'
-	  };
-	  Point.prototype.copy = function copy () {
-	    return new Point(this._coordinates.copy(), this._factory)
-	  };
-	  Point.prototype.getCoordinateSequence = function getCoordinateSequence () {
-	    return this._coordinates
-	  };
-	  Point.prototype.getY = function getY () {
-	    if (this.getCoordinate() === null) {
-	      throw new Error('getY called on empty Point')
-	    }
-	    return this.getCoordinate().y
-	  };
-	  Point.prototype.isEmpty = function isEmpty () {
-	    return this._coordinates.size() === 0
-	  };
-	  Point.prototype.init = function init (coordinates) {
-	    if (coordinates === null) {
-	      coordinates = this.getFactory().getCoordinateSequenceFactory().create([]);
 	    }
-	    Assert.isTrue(coordinates.size() <= 1);
-	    this._coordinates = coordinates;
-	  };
-	  Point.prototype.isSimple = function isSimple () {
-	    return true
-	  };
-	  Point.prototype.interfaces_ = function interfaces_ () {
-	    return [Puntal]
-	  };
-	  Point.prototype.getClass = function getClass () {
-	    return Point
-	  };
-	  staticAccessors.serialVersionUID.get = function () { return 4902022702746614570 };
+	  }); // For flags only, fallback to `country` tag only if no other namelike values were found.
+	  // See https://github.com/openstreetmap/iD/pull/8305#issuecomment-769174070
 
-	  Object.defineProperties( Point, staticAccessors );
+	  if (tags.man_made === 'flagpole' && !primary.size && !alternate.size && !!tags.country) {
+	    var osmvalue = tags.country;
 
-	  return Point;
-	}(Geometry));
+	    if (/;/.test(osmvalue)) {
+	      foundSemi = true;
+	    } else {
+	      alternate.add(osmvalue);
+	    }
+	  } // If any namelike value contained a semicolon, return empty set and don't try matching anything.
 
-	var Polygonal = function Polygonal () {};
 
-	Polygonal.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Polygonal.prototype.getClass = function getClass () {
-	  return Polygonal
-	};
+	  if (foundSemi) {
+	    return empty;
+	  } else {
+	    return {
+	      primary: primary,
+	      alternate: alternate
+	    };
+	  }
 
-	var Polygon = (function (Geometry$$1) {
-	  function Polygon (shell, holes, factory) {
-	    Geometry$$1.call(this, factory);
-	    this._shell = null;
-	    this._holes = null;
-	    if (shell === null) {
-	      shell = this.getFactory().createLinearRing();
-	    }
-	    if (holes === null) {
-	      holes = [];
-	    }
-	    if (Geometry$$1.hasNullElements(holes)) {
-	      throw new IllegalArgumentException('holes must not contain null elements')
-	    }
-	    if (shell.isEmpty() && Geometry$$1.hasNonEmptyElements(holes)) {
-	      throw new IllegalArgumentException('shell is empty but holes are not')
-	    }
-	    this._shell = shell;
-	    this._holes = holes;
+	  function isNamelike(osmkey, which) {
+	    if (osmkey === 'old_name') return false;
+	    return patterns[which].test(osmkey) && !notNames.test(osmkey);
 	  }
+	} // `gatherTuples()`
+	// Generate all combinations of [key,value,name] that we want to test.
+	// This prioritizes them so that the primary name and k/v pairs go first
+	//
+	// Arguments
+	//   `tryKVs`: `Object` containing primary and alternate k/v pairs to test
+	//   `tryNames`: `Object` containing primary and alternate names to test
+	// Returns
+	//   `Array`: tuple objects ordered by priority
+	//
 
-	  if ( Geometry$$1 ) { Polygon.__proto__ = Geometry$$1; }
-	  Polygon.prototype = Object.create( Geometry$$1 && Geometry$$1.prototype );
-	  Polygon.prototype.constructor = Polygon;
 
-	  var staticAccessors = { serialVersionUID: { configurable: true } };
-	  Polygon.prototype.computeEnvelopeInternal = function computeEnvelopeInternal () {
-	    return this._shell.getEnvelopeInternal()
-	  };
-	  Polygon.prototype.getSortIndex = function getSortIndex () {
-	    return Geometry$$1.SORTINDEX_POLYGON
-	  };
-	  Polygon.prototype.getCoordinates = function getCoordinates () {
-	    var this$1 = this;
-
-	    if (this.isEmpty()) {
-	      return []
-	    }
-	    var coordinates = new Array(this.getNumPoints()).fill(null);
-	    var k = -1;
-	    var shellCoordinates = this._shell.getCoordinates();
-	    for (var x = 0; x < shellCoordinates.length; x++) {
-	      k++;
-	      coordinates[k] = shellCoordinates[x];
-	    }
-	    for (var i = 0; i < this._holes.length; i++) {
-	      var childCoordinates = this$1._holes[i].getCoordinates();
-	      for (var j = 0; j < childCoordinates.length; j++) {
-	        k++;
-	        coordinates[k] = childCoordinates[j];
-	      }
-	    }
-	    return coordinates
-	  };
-	  Polygon.prototype.getArea = function getArea () {
-	    var this$1 = this;
+	function gatherTuples(tryKVs, tryNames) {
+	  var tuples = [];
+	  ['primary', 'alternate'].forEach(function (whichName) {
+	    // test names longest to shortest
+	    var arr = Array.from(tryNames[whichName]).sort(function (a, b) {
+	      return b.length - a.length;
+	    });
+	    arr.forEach(function (n) {
+	      ['primary', 'alternate'].forEach(function (whichKV) {
+	        tryKVs[whichKV].forEach(function (kv) {
+	          var parts = kv.split('/', 2);
+	          var k = parts[0];
+	          var v = parts[1];
+	          tuples.push({
+	            k: k,
+	            v: v,
+	            n: n
+	          });
+	        });
+	      });
+	    });
+	  });
+	  return tuples;
+	} // `_upgradeTags()`
+	// Try to match a feature to a canonical record in name-suggestion-index
+	// and upgrade the tags to match.
+	//
+	// Arguments
+	//   `tags`: `Object` containing the feature's OSM tags
+	//   `loc`: Location where this feature exists, as a [lon, lat]
+	// Returns
+	//   `Object` containing the result, or `null` if no changes needed:
+	//   {
+	//     'newTags': `Object` - The tags the the feature should have
+	//     'matched': `Object` - The matched item
+	//   }
+	//
+
+
+	function _upgradeTags(tags, loc) {
+	  var newTags = Object.assign({}, tags); // shallow copy
 
-	    var area = 0.0;
-	    area += Math.abs(CGAlgorithms.signedArea(this._shell.getCoordinateSequence()));
-	    for (var i = 0; i < this._holes.length; i++) {
-	      area -= Math.abs(CGAlgorithms.signedArea(this$1._holes[i].getCoordinateSequence()));
-	    }
-	    return area
-	  };
-	  Polygon.prototype.isRectangle = function isRectangle () {
-	    if (this.getNumInteriorRing() !== 0) { return false }
-	    if (this._shell === null) { return false }
-	    if (this._shell.getNumPoints() !== 5) { return false }
-	    var seq = this._shell.getCoordinateSequence();
-	    var env = this.getEnvelopeInternal();
-	    for (var i = 0; i < 5; i++) {
-	      var x = seq.getX(i);
-	      if (!(x === env.getMinX() || x === env.getMaxX())) { return false }
-	      var y = seq.getY(i);
-	      if (!(y === env.getMinY() || y === env.getMaxY())) { return false }
-	    }
-	    var prevX = seq.getX(0);
-	    var prevY = seq.getY(0);
-	    for (var i$1 = 1; i$1 <= 4; i$1++) {
-	      var x$1 = seq.getX(i$1);
-	      var y$1 = seq.getY(i$1);
-	      var xChanged = x$1 !== prevX;
-	      var yChanged = y$1 !== prevY;
-	      if (xChanged === yChanged) { return false }
-	      prevX = x$1;
-	      prevY = y$1;
-	    }
-	    return true
-	  };
-	  Polygon.prototype.equalsExact = function equalsExact () {
-	    var this$1 = this;
+	  var changed = false; // Before anything, perform trivial Wikipedia/Wikidata replacements
 
-	    if (arguments.length === 2) {
-	      var other = arguments[0];
-	      var tolerance = arguments[1];
-	      if (!this.isEquivalentClass(other)) {
-	        return false
-	      }
-	      var otherPolygon = other;
-	      var thisShell = this._shell;
-	      var otherPolygonShell = otherPolygon._shell;
-	      if (!thisShell.equalsExact(otherPolygonShell, tolerance)) {
-	        return false
-	      }
-	      if (this._holes.length !== otherPolygon._holes.length) {
-	        return false
-	      }
-	      for (var i = 0; i < this._holes.length; i++) {
-	        if (!this$1._holes[i].equalsExact(otherPolygon._holes[i], tolerance)) {
-	          return false
-	        }
-	      }
-	      return true
-	    } else { return Geometry$$1.prototype.equalsExact.apply(this, arguments) }
-	  };
-	  Polygon.prototype.normalize = function normalize () {
-	    var this$1 = this;
-
-	    if (arguments.length === 0) {
-	      this.normalize(this._shell, true);
-	      for (var i = 0; i < this._holes.length; i++) {
-	        this$1.normalize(this$1._holes[i], false);
-	      }
-	      Arrays.sort(this._holes);
-	    } else if (arguments.length === 2) {
-	      var ring = arguments[0];
-	      var clockwise = arguments[1];
-	      if (ring.isEmpty()) {
-	        return null
-	      }
-	      var uniqueCoordinates = new Array(ring.getCoordinates().length - 1).fill(null);
-	      System.arraycopy(ring.getCoordinates(), 0, uniqueCoordinates, 0, uniqueCoordinates.length);
-	      var minCoordinate = CoordinateArrays.minCoordinate(ring.getCoordinates());
-	      CoordinateArrays.scroll(uniqueCoordinates, minCoordinate);
-	      System.arraycopy(uniqueCoordinates, 0, ring.getCoordinates(), 0, uniqueCoordinates.length);
-	      ring.getCoordinates()[uniqueCoordinates.length] = uniqueCoordinates[0];
-	      if (CGAlgorithms.isCCW(ring.getCoordinates()) === clockwise) {
-	        CoordinateArrays.reverse(ring.getCoordinates());
-	      }
-	    }
-	  };
-	  Polygon.prototype.getCoordinate = function getCoordinate () {
-	    return this._shell.getCoordinate()
-	  };
-	  Polygon.prototype.getNumInteriorRing = function getNumInteriorRing () {
-	    return this._holes.length
-	  };
-	  Polygon.prototype.getBoundaryDimension = function getBoundaryDimension () {
-	    return 1
-	  };
-	  Polygon.prototype.getDimension = function getDimension () {
-	    return 2
-	  };
-	  Polygon.prototype.getLength = function getLength () {
-	    var this$1 = this;
-
-	    var len = 0.0;
-	    len += this._shell.getLength();
-	    for (var i = 0; i < this._holes.length; i++) {
-	      len += this$1._holes[i].getLength();
-	    }
-	    return len
-	  };
-	  Polygon.prototype.getNumPoints = function getNumPoints () {
-	    var this$1 = this;
-
-	    var numPoints = this._shell.getNumPoints();
-	    for (var i = 0; i < this._holes.length; i++) {
-	      numPoints += this$1._holes[i].getNumPoints();
-	    }
-	    return numPoints
-	  };
-	  Polygon.prototype.reverse = function reverse () {
-	    var this$1 = this;
-
-	    var poly = this.copy();
-	    poly._shell = this._shell.copy().reverse();
-	    poly._holes = new Array(this._holes.length).fill(null);
-	    for (var i = 0; i < this._holes.length; i++) {
-	      poly._holes[i] = this$1._holes[i].copy().reverse();
-	    }
-	    return poly
-	  };
-	  Polygon.prototype.convexHull = function convexHull () {
-	    return this.getExteriorRing().convexHull()
-	  };
-	  Polygon.prototype.compareToSameClass = function compareToSameClass () {
-	    var this$1 = this;
+	  Object.keys(newTags).forEach(function (osmkey) {
+	    var matchTag = osmkey.match(/^(\w+:)?wikidata$/);
 
-	    if (arguments.length === 1) {
-	      var o = arguments[0];
-	      var thisShell = this._shell;
-	      var otherShell = o._shell;
-	      return thisShell.compareToSameClass(otherShell)
-	    } else if (arguments.length === 2) {
-	      var o$1 = arguments[0];
-	      var comp = arguments[1];
-	      var poly = o$1;
-	      var thisShell$1 = this._shell;
-	      var otherShell$1 = poly._shell;
-	      var shellComp = thisShell$1.compareToSameClass(otherShell$1, comp);
-	      if (shellComp !== 0) { return shellComp }
-	      var nHole1 = this.getNumInteriorRing();
-	      var nHole2 = poly.getNumInteriorRing();
-	      var i = 0;
-	      while (i < nHole1 && i < nHole2) {
-	        var thisHole = this$1.getInteriorRingN(i);
-	        var otherHole = poly.getInteriorRingN(i);
-	        var holeComp = thisHole.compareToSameClass(otherHole, comp);
-	        if (holeComp !== 0) { return holeComp }
-	        i++;
-	      }
-	      if (i < nHole1) { return 1 }
-	      if (i < nHole2) { return -1 }
-	      return 0
-	    }
-	  };
-	  Polygon.prototype.apply = function apply (filter) {
-	    var this$1 = this;
+	    if (matchTag) {
+	      // Look at '*:wikidata' tags
+	      var prefix = matchTag[1] || '';
+	      var wd = newTags[osmkey];
+	      var replace = _nsi.replacements[wd]; // If it matches a QID in the replacement list...
 
-	    if (hasInterface(filter, CoordinateFilter)) {
-	      this._shell.apply(filter);
-	      for (var i$1 = 0; i$1 < this._holes.length; i$1++) {
-	        this$1._holes[i$1].apply(filter);
-	      }
-	    } else if (hasInterface(filter, CoordinateSequenceFilter)) {
-	      this._shell.apply(filter);
-	      if (!filter.isDone()) {
-	        for (var i$2 = 0; i$2 < this._holes.length; i$2++) {
-	          this$1._holes[i$2].apply(filter);
-	          if (filter.isDone()) { break }
+	      if (replace && replace.wikidata !== undefined) {
+	        // replace or delete `*:wikidata` tag
+	        changed = true;
+
+	        if (replace.wikidata) {
+	          newTags[osmkey] = replace.wikidata;
+	        } else {
+	          delete newTags[osmkey];
 	        }
 	      }
-	      if (filter.isGeometryChanged()) { this.geometryChanged(); }
-	    } else if (hasInterface(filter, GeometryFilter)) {
-	      filter.filter(this);
-	    } else if (hasInterface(filter, GeometryComponentFilter)) {
-	      filter.filter(this);
-	      this._shell.apply(filter);
-	      for (var i = 0; i < this._holes.length; i++) {
-	        this$1._holes[i].apply(filter);
+
+	      if (replace && replace.wikipedia !== undefined) {
+	        // replace or delete `*:wikipedia` tag
+	        changed = true;
+	        var wpkey = "".concat(prefix, "wikipedia");
+
+	        if (replace.wikipedia) {
+	          newTags[wpkey] = replace.wikipedia;
+	        } else {
+	          delete newTags[wpkey];
+	        }
 	      }
 	    }
-	  };
-	  Polygon.prototype.getBoundary = function getBoundary () {
-	    var this$1 = this;
+	  }); // Match a 'route_master' as if it were a 'route' - name-suggestion-index#5184
 
-	    if (this.isEmpty()) {
-	      return this.getFactory().createMultiLineString()
-	    }
-	    var rings = new Array(this._holes.length + 1).fill(null);
-	    rings[0] = this._shell;
-	    for (var i = 0; i < this._holes.length; i++) {
-	      rings[i + 1] = this$1._holes[i];
-	    }
-	    if (rings.length <= 1) { return this.getFactory().createLinearRing(rings[0].getCoordinateSequence()) }
-	    return this.getFactory().createMultiLineString(rings)
-	  };
-	  Polygon.prototype.clone = function clone () {
-	    var this$1 = this;
+	  var isRouteMaster = tags.type === 'route_master'; // Gather key/value tag pairs to try to match
 
-	    var poly = Geometry$$1.prototype.clone.call(this);
-	    poly._shell = this._shell.clone();
-	    poly._holes = new Array(this._holes.length).fill(null);
-	    for (var i = 0; i < this._holes.length; i++) {
-	      poly._holes[i] = this$1._holes[i].clone();
-	    }
-	    return poly
-	  };
-	  Polygon.prototype.getGeometryType = function getGeometryType () {
-	    return 'Polygon'
-	  };
-	  Polygon.prototype.copy = function copy () {
-	    var this$1 = this;
+	  var tryKVs = gatherKVs(tags);
 
-	    var shell = this._shell.copy();
-	    var holes = new Array(this._holes.length).fill(null);
-	    for (var i = 0; i < holes.length; i++) {
-	      holes[i] = this$1._holes[i].copy();
-	    }
-	    return new Polygon(shell, holes, this._factory)
-	  };
-	  Polygon.prototype.getExteriorRing = function getExteriorRing () {
-	    return this._shell
-	  };
-	  Polygon.prototype.isEmpty = function isEmpty () {
-	    return this._shell.isEmpty()
-	  };
-	  Polygon.prototype.getInteriorRingN = function getInteriorRingN (n) {
-	    return this._holes[n]
-	  };
-	  Polygon.prototype.interfaces_ = function interfaces_ () {
-	    return [Polygonal]
-	  };
-	  Polygon.prototype.getClass = function getClass () {
-	    return Polygon
-	  };
-	  staticAccessors.serialVersionUID.get = function () { return -3494792200821764533 };
+	  if (!tryKVs.primary.size && !tryKVs.alternate.size) {
+	    return changed ? {
+	      newTags: newTags,
+	      matched: null
+	    } : null;
+	  } // Gather namelike tag values to try to match
 
-	  Object.defineProperties( Polygon, staticAccessors );
 
-	  return Polygon;
-	}(Geometry));
+	  var tryNames = gatherNames(tags); // Do `wikidata=*` or `wikipedia=*` tags identify this entity as a chain? - See #6416
+	  // If so, these tags can be swapped to e.g. `brand:wikidata`/`brand:wikipedia`.
 
-	var MultiPoint = (function (GeometryCollection$$1) {
-	  function MultiPoint () {
-	    GeometryCollection$$1.apply(this, arguments);
-	  }
+	  var foundQID = _nsi.qids.get(tags.wikidata) || _nsi.qids.get(tags.wikipedia);
 
-	  if ( GeometryCollection$$1 ) { MultiPoint.__proto__ = GeometryCollection$$1; }
-	  MultiPoint.prototype = Object.create( GeometryCollection$$1 && GeometryCollection$$1.prototype );
-	  MultiPoint.prototype.constructor = MultiPoint;
+	  if (foundQID) tryNames.primary.add(foundQID); // matcher will recognize the Wikidata QID as name too
 
-	  var staticAccessors = { serialVersionUID: { configurable: true } };
+	  if (!tryNames.primary.size && !tryNames.alternate.size) {
+	    return changed ? {
+	      newTags: newTags,
+	      matched: null
+	    } : null;
+	  } // Order the [key,value,name] tuples - test primary before alternate
 
-	  MultiPoint.prototype.getSortIndex = function getSortIndex () {
-	    return Geometry.SORTINDEX_MULTIPOINT
-	  };
-	  MultiPoint.prototype.isValid = function isValid () {
-	    return true
-	  };
-	  MultiPoint.prototype.equalsExact = function equalsExact () {
-	    if (arguments.length === 2) {
-	      var other = arguments[0];
-	      var tolerance = arguments[1];
-	      if (!this.isEquivalentClass(other)) {
-	        return false
-	      }
-	      return GeometryCollection$$1.prototype.equalsExact.call(this, other, tolerance)
-	    } else { return GeometryCollection$$1.prototype.equalsExact.apply(this, arguments) }
-	  };
-	  MultiPoint.prototype.getCoordinate = function getCoordinate () {
-	    if (arguments.length === 1) {
-	      var n = arguments[0];
-	      return this._geometries[n].getCoordinate()
-	    } else { return GeometryCollection$$1.prototype.getCoordinate.apply(this, arguments) }
-	  };
-	  MultiPoint.prototype.getBoundaryDimension = function getBoundaryDimension () {
-	    return Dimension.FALSE
-	  };
-	  MultiPoint.prototype.getDimension = function getDimension () {
-	    return 0
-	  };
-	  MultiPoint.prototype.getBoundary = function getBoundary () {
-	    return this.getFactory().createGeometryCollection(null)
-	  };
-	  MultiPoint.prototype.getGeometryType = function getGeometryType () {
-	    return 'MultiPoint'
-	  };
-	  MultiPoint.prototype.copy = function copy () {
-	    var this$1 = this;
 
-	    var points = new Array(this._geometries.length).fill(null);
-	    for (var i = 0; i < points.length; i++) {
-	      points[i] = this$1._geometries[i].copy();
-	    }
-	    return new MultiPoint(points, this._factory)
-	  };
-	  MultiPoint.prototype.interfaces_ = function interfaces_ () {
-	    return [Puntal]
-	  };
-	  MultiPoint.prototype.getClass = function getClass () {
-	    return MultiPoint
-	  };
-	  staticAccessors.serialVersionUID.get = function () { return -8048474874175355449 };
+	  var tuples = gatherTuples(tryKVs, tryNames);
 
-	  Object.defineProperties( MultiPoint, staticAccessors );
+	  var _loop = function _loop(i) {
+	    var tuple = tuples[i];
 
-	  return MultiPoint;
-	}(GeometryCollection));
+	    var hits = _nsi.matcher.match(tuple.k, tuple.v, tuple.n, loc); // Attempt to match an item in NSI
 
-	var LinearRing = (function (LineString$$1) {
-	  function LinearRing (points, factory) {
-	    if (points instanceof Coordinate && factory instanceof GeometryFactory) {
-	      points = factory.getCoordinateSequenceFactory().create(points);
-	    }
-	    LineString$$1.call(this, points, factory);
-	    this.validateConstruction();
-	  }
 
-	  if ( LineString$$1 ) { LinearRing.__proto__ = LineString$$1; }
-	  LinearRing.prototype = Object.create( LineString$$1 && LineString$$1.prototype );
-	  LinearRing.prototype.constructor = LinearRing;
+	    if (!hits || !hits.length) return "continue"; // no match, try next tuple
 
-	  var staticAccessors = { MINIMUM_VALID_SIZE: { configurable: true },serialVersionUID: { configurable: true } };
-	  LinearRing.prototype.getSortIndex = function getSortIndex () {
-	    return Geometry.SORTINDEX_LINEARRING
-	  };
-	  LinearRing.prototype.getBoundaryDimension = function getBoundaryDimension () {
-	    return Dimension.FALSE
-	  };
-	  LinearRing.prototype.isClosed = function isClosed () {
-	    if (this.isEmpty()) {
-	      return true
-	    }
-	    return LineString$$1.prototype.isClosed.call(this)
-	  };
-	  LinearRing.prototype.reverse = function reverse () {
-	    var seq = this._points.copy();
-	    CoordinateSequences.reverse(seq);
-	    var rev = this.getFactory().createLinearRing(seq);
-	    return rev
-	  };
-	  LinearRing.prototype.validateConstruction = function validateConstruction () {
-	    if (!this.isEmpty() && !LineString$$1.prototype.isClosed.call(this)) {
-	      throw new IllegalArgumentException('Points of LinearRing do not form a closed linestring')
-	    }
-	    if (this.getCoordinateSequence().size() >= 1 && this.getCoordinateSequence().size() < LinearRing.MINIMUM_VALID_SIZE) {
-	      throw new IllegalArgumentException('Invalid number of points in LinearRing (found ' + this.getCoordinateSequence().size() + ' - must be 0 or >= 4)')
-	    }
-	  };
-	  LinearRing.prototype.getGeometryType = function getGeometryType () {
-	    return 'LinearRing'
-	  };
-	  LinearRing.prototype.copy = function copy () {
-	    return new LinearRing(this._points.copy(), this._factory)
-	  };
-	  LinearRing.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  LinearRing.prototype.getClass = function getClass () {
-	    return LinearRing
-	  };
-	  staticAccessors.MINIMUM_VALID_SIZE.get = function () { return 4 };
-	  staticAccessors.serialVersionUID.get = function () { return -4261142084085851829 };
+	    if (hits[0].match !== 'primary' && hits[0].match !== 'alternate') return "break"; // a generic match, stop looking
+	    // A match may contain multiple results, the first one is likely the best one for this location
+	    // e.g. `['pfk-a54c14', 'kfc-1ff19c', 'kfc-658eea']`
 
-	  Object.defineProperties( LinearRing, staticAccessors );
+	    var itemID = void 0,
+	        item = void 0;
 
-	  return LinearRing;
-	}(LineString));
+	    for (var j = 0; j < hits.length; j++) {
+	      var hit = hits[j];
+	      itemID = hit.itemID;
+	      if (_nsi.dissolved[itemID]) continue; // Don't upgrade to a dissolved item
 
-	var MultiPolygon = (function (GeometryCollection$$1) {
-	  function MultiPolygon () {
-	    GeometryCollection$$1.apply(this, arguments);
-	  }
+	      item = _nsi.ids.get(itemID);
+	      if (!item) continue;
+	      var mainTag = item.mainTag; // e.g. `brand:wikidata`
 
-	  if ( GeometryCollection$$1 ) { MultiPolygon.__proto__ = GeometryCollection$$1; }
-	  MultiPolygon.prototype = Object.create( GeometryCollection$$1 && GeometryCollection$$1.prototype );
-	  MultiPolygon.prototype.constructor = MultiPolygon;
+	      var itemQID = item.tags[mainTag]; // e.g. `brand:wikidata` qid
 
-	  var staticAccessors = { serialVersionUID: { configurable: true } };
+	      var notQID = newTags["not:".concat(mainTag)]; // e.g. `not:brand:wikidata` qid
 
-	  MultiPolygon.prototype.getSortIndex = function getSortIndex () {
-	    return Geometry.SORTINDEX_MULTIPOLYGON
-	  };
-	  MultiPolygon.prototype.equalsExact = function equalsExact () {
-	    if (arguments.length === 2) {
-	      var other = arguments[0];
-	      var tolerance = arguments[1];
-	      if (!this.isEquivalentClass(other)) {
-	        return false
-	      }
-	      return GeometryCollection$$1.prototype.equalsExact.call(this, other, tolerance)
-	    } else { return GeometryCollection$$1.prototype.equalsExact.apply(this, arguments) }
-	  };
-	  MultiPolygon.prototype.getBoundaryDimension = function getBoundaryDimension () {
-	    return 1
-	  };
-	  MultiPolygon.prototype.getDimension = function getDimension () {
-	    return 2
-	  };
-	  MultiPolygon.prototype.reverse = function reverse () {
-	    var this$1 = this;
+	      if ( // Exceptions, skip this hit
+	      !itemQID || itemQID === notQID || // No `*:wikidata` or matched a `not:*:wikidata`
+	      newTags.office && !item.tags.office // feature may be a corporate office for a brand? - #6416
+	      ) {
+	          item = null;
+	          continue; // continue looking
+	        } else {
+	          break; // use `item`
+	        }
+	    } // Can't use any of these hits, try next tuple..
 
-	    var n = this._geometries.length;
-	    var revGeoms = new Array(n).fill(null);
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      revGeoms[i] = this$1._geometries[i].reverse();
-	    }
-	    return this.getFactory().createMultiPolygon(revGeoms)
-	  };
-	  MultiPolygon.prototype.getBoundary = function getBoundary () {
-	    var this$1 = this;
 
-	    if (this.isEmpty()) {
-	      return this.getFactory().createMultiLineString()
-	    }
-	    var allRings = new ArrayList();
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      var polygon = this$1._geometries[i];
-	      var rings = polygon.getBoundary();
-	      for (var j = 0; j < rings.getNumGeometries(); j++) {
-	        allRings.add(rings.getGeometryN(j));
+	    if (!item) return "continue"; // At this point we have matched a canonical item and can suggest tag upgrades..
+
+	    item = JSON.parse(JSON.stringify(item)); // deep copy
+
+	    var tkv = item.tkv;
+	    var parts = tkv.split('/', 3); // tkv = "tree/key/value"
+
+	    var k = parts[1];
+	    var v = parts[2];
+	    var category = _nsi.data[tkv];
+	    var properties = category.properties || {}; // Preserve some tags that we specifically don't want NSI to overwrite. ('^name', sometimes)
+
+	    var preserveTags = item.preserveTags || properties.preserveTags || []; // These tags can be toplevel tags -or- attributes - so we generally want to preserve existing values - #8615
+	    // We'll only _replace_ the tag value if this tag is the toplevel/defining tag for the matched item (`k`)
+
+	    ['building', 'emergency', 'internet_access', 'takeaway'].forEach(function (osmkey) {
+	      if (k !== osmkey) preserveTags.push("^".concat(osmkey, "$"));
+	    });
+	    var regexes = preserveTags.map(function (s) {
+	      return new RegExp(s, 'i');
+	    });
+	    var keepTags = {};
+	    Object.keys(newTags).forEach(function (osmkey) {
+	      if (regexes.some(function (regex) {
+	        return regex.test(osmkey);
+	      })) {
+	        keepTags[osmkey] = newTags[osmkey];
 	      }
-	    }
-	    var allRingsArray = new Array(allRings.size()).fill(null);
-	    return this.getFactory().createMultiLineString(allRings.toArray(allRingsArray))
-	  };
-	  MultiPolygon.prototype.getGeometryType = function getGeometryType () {
-	    return 'MultiPolygon'
-	  };
-	  MultiPolygon.prototype.copy = function copy () {
-	    var this$1 = this;
+	    }); // Remove any primary tags ("amenity", "craft", "shop", "man_made", "route", etc) that have a
+	    // value like `amenity=yes` or `shop=yes` (exceptions have already been added to `keepTags` above)
 
-	    var polygons = new Array(this._geometries.length).fill(null);
-	    for (var i = 0; i < polygons.length; i++) {
-	      polygons[i] = this$1._geometries[i].copy();
-	    }
-	    return new MultiPolygon(polygons, this._factory)
-	  };
-	  MultiPolygon.prototype.interfaces_ = function interfaces_ () {
-	    return [Polygonal]
-	  };
-	  MultiPolygon.prototype.getClass = function getClass () {
-	    return MultiPolygon
-	  };
-	  staticAccessors.serialVersionUID.get = function () { return -551033529766975875 };
+	    _nsi.kvt.forEach(function (vmap, k) {
+	      if (newTags[k] === 'yes') delete newTags[k];
+	    }); // Replace mistagged `wikidata`/`wikipedia` with e.g. `brand:wikidata`/`brand:wikipedia`
 
-	  Object.defineProperties( MultiPolygon, staticAccessors );
 
-	  return MultiPolygon;
-	}(GeometryCollection));
+	    if (foundQID) {
+	      delete newTags.wikipedia;
+	      delete newTags.wikidata;
+	    } // Do the tag upgrade
 
-	var GeometryEditor = function GeometryEditor (factory) {
-	  this._factory = factory || null;
-	  this._isUserDataCopied = false;
-	};
 
-	var staticAccessors$16 = { NoOpGeometryOperation: { configurable: true },CoordinateOperation: { configurable: true },CoordinateSequenceOperation: { configurable: true } };
-	GeometryEditor.prototype.setCopyUserData = function setCopyUserData (isUserDataCopied) {
-	  this._isUserDataCopied = isUserDataCopied;
-	};
-	GeometryEditor.prototype.edit = function edit (geometry, operation) {
-	  if (geometry === null) { return null }
-	  var result = this.editInternal(geometry, operation);
-	  if (this._isUserDataCopied) {
-	    result.setUserData(geometry.getUserData());
-	  }
-	  return result
-	};
-	GeometryEditor.prototype.editInternal = function editInternal (geometry, operation) {
-	  if (this._factory === null) { this._factory = geometry.getFactory(); }
-	  if (geometry instanceof GeometryCollection) {
-	    return this.editGeometryCollection(geometry, operation)
-	  }
-	  if (geometry instanceof Polygon) {
-	    return this.editPolygon(geometry, operation)
-	  }
-	  if (geometry instanceof Point$1) {
-	    return operation.edit(geometry, this._factory)
-	  }
-	  if (geometry instanceof LineString) {
-	    return operation.edit(geometry, this._factory)
-	  }
-	  Assert.shouldNeverReachHere('Unsupported Geometry class: ' + geometry.getClass().getName());
-	  return null
-	};
-	GeometryEditor.prototype.editGeometryCollection = function editGeometryCollection (collection, operation) {
-	    var this$1 = this;
+	    Object.assign(newTags, item.tags, keepTags); // Swap `route` back to `route_master` - name-suggestion-index#5184
 
-	  var collectionForType = operation.edit(collection, this._factory);
-	  var geometries = new ArrayList();
-	  for (var i = 0; i < collectionForType.getNumGeometries(); i++) {
-	    var geometry = this$1.edit(collectionForType.getGeometryN(i), operation);
-	    if (geometry === null || geometry.isEmpty()) {
-	      continue
-	    }
-	    geometries.add(geometry);
-	  }
-	  if (collectionForType.getClass() === MultiPoint) {
-	    return this._factory.createMultiPoint(geometries.toArray([]))
-	  }
-	  if (collectionForType.getClass() === MultiLineString) {
-	    return this._factory.createMultiLineString(geometries.toArray([]))
-	  }
-	  if (collectionForType.getClass() === MultiPolygon) {
-	    return this._factory.createMultiPolygon(geometries.toArray([]))
-	  }
-	  return this._factory.createGeometryCollection(geometries.toArray([]))
-	};
-	GeometryEditor.prototype.editPolygon = function editPolygon (polygon, operation) {
-	    var this$1 = this;
+	    if (isRouteMaster) {
+	      newTags.route_master = newTags.route;
+	      delete newTags.route;
+	    } // Special `branch` splitting rules - IF..
+	    // - NSI is suggesting to replace `name`, AND
+	    // - `branch` doesn't already contain something, AND
+	    // - original name has not moved to an alternate name (e.g. "Dunkin' Donuts" -> "Dunkin'"), AND
+	    // - original name is "some name" + "some stuff", THEN
+	    // consider splitting `name` into `name`/`branch`..
 
-	  var newPolygon = operation.edit(polygon, this._factory);
-	  if (newPolygon === null) { newPolygon = this._factory.createPolygon(null); }
-	  if (newPolygon.isEmpty()) {
-	    return newPolygon
-	  }
-	  var shell = this.edit(newPolygon.getExteriorRing(), operation);
-	  if (shell === null || shell.isEmpty()) {
-	    return this._factory.createPolygon()
-	  }
-	  var holes = new ArrayList();
-	  for (var i = 0; i < newPolygon.getNumInteriorRing(); i++) {
-	    var hole = this$1.edit(newPolygon.getInteriorRingN(i), operation);
-	    if (hole === null || hole.isEmpty()) {
-	      continue
-	    }
-	    holes.add(hole);
-	  }
-	  return this._factory.createPolygon(shell, holes.toArray([]))
-	};
-	GeometryEditor.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryEditor.prototype.getClass = function getClass () {
-	  return GeometryEditor
-	};
-	GeometryEditor.GeometryEditorOperation = function GeometryEditorOperation () {};
-	staticAccessors$16.NoOpGeometryOperation.get = function () { return NoOpGeometryOperation };
-	staticAccessors$16.CoordinateOperation.get = function () { return CoordinateOperation };
-	staticAccessors$16.CoordinateSequenceOperation.get = function () { return CoordinateSequenceOperation };
 
-	Object.defineProperties( GeometryEditor, staticAccessors$16 );
+	    var origName = tags.name;
+	    var newName = newTags.name;
 
-	var NoOpGeometryOperation = function NoOpGeometryOperation () {};
+	    if (newName && origName && newName !== origName && !newTags.branch) {
+	      var newNames = gatherNames(newTags);
+	      var newSet = new Set([].concat(_toConsumableArray(newNames.primary), _toConsumableArray(newNames.alternate)));
+	      var isMoved = newSet.has(origName); // another tag holds the original name now
 
-	NoOpGeometryOperation.prototype.edit = function edit (geometry, factory) {
-	  return geometry
-	};
-	NoOpGeometryOperation.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryEditor.GeometryEditorOperation]
-	};
-	NoOpGeometryOperation.prototype.getClass = function getClass () {
-	  return NoOpGeometryOperation
-	};
+	      if (!isMoved) {
+	        // Test name fragments, longest to shortest, to fit them into a "Name Branch" pattern.
+	        // e.g. "TUI ReiseCenter - Neuss Innenstadt" -> ["TUI", "ReiseCenter", "Neuss", "Innenstadt"]
+	        var nameParts = origName.split(/[\s\-\/,.]/);
 
-	var CoordinateOperation = function CoordinateOperation () {};
+	        for (var split = nameParts.length; split > 0; split--) {
+	          var name = nameParts.slice(0, split).join(' '); // e.g. "TUI ReiseCenter"
 
-	CoordinateOperation.prototype.edit = function edit (geometry, factory) {
-	  var coords = this.editCoordinates(geometry.getCoordinates(), geometry);
-	  if (coords === null) { return geometry }
-	  if (geometry instanceof LinearRing) {
-	    return factory.createLinearRing(coords)
-	  }
-	  if (geometry instanceof LineString) {
-	    return factory.createLineString(coords)
-	  }
-	  if (geometry instanceof Point$1) {
-	    if (coords.length > 0) {
-	      return factory.createPoint(coords[0])
-	    } else {
-	      return factory.createPoint()
-	    }
-	  }
-	  return geometry
-	};
-	CoordinateOperation.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryEditor.GeometryEditorOperation]
-	};
-	CoordinateOperation.prototype.getClass = function getClass () {
-	  return CoordinateOperation
-	};
+	          var branch = nameParts.slice(split).join(' '); // e.g. "Neuss Innenstadt"
 
-	var CoordinateSequenceOperation = function CoordinateSequenceOperation () {};
+	          var nameHits = _nsi.matcher.match(k, v, name, loc);
 
-	CoordinateSequenceOperation.prototype.edit = function edit (geometry, factory) {
-	  if (geometry instanceof LinearRing) {
-	    return factory.createLinearRing(this.edit(geometry.getCoordinateSequence(), geometry))
-	  }
-	  if (geometry instanceof LineString) {
-	    return factory.createLineString(this.edit(geometry.getCoordinateSequence(), geometry))
-	  }
-	  if (geometry instanceof Point$1) {
-	    return factory.createPoint(this.edit(geometry.getCoordinateSequence(), geometry))
-	  }
-	  return geometry
-	};
-	CoordinateSequenceOperation.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryEditor.GeometryEditorOperation]
-	};
-	CoordinateSequenceOperation.prototype.getClass = function getClass () {
-	  return CoordinateSequenceOperation
-	};
+	          if (!nameHits || !nameHits.length) continue; // no match, try next name fragment
 
-	var CoordinateArraySequence = function CoordinateArraySequence () {
-	  var this$1 = this;
+	          if (nameHits.some(function (hit) {
+	            return hit.itemID === itemID;
+	          })) {
+	            // matched the name fragment to the same itemID above
+	            if (branch) {
+	              if (notBranches.test(branch)) {
+	                // "branch" was detected but is noise ("factory outlet", etc)
+	                newTags.name = origName; // Leave `name` alone, this part of the name may be significant..
+	              } else {
+	                var branchHits = _nsi.matcher.match(k, v, branch, loc);
 
-	  this._dimension = 3;
-	  this._coordinates = null;
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof Array) {
-	      this._coordinates = arguments[0];
-	      this._dimension = 3;
-	    } else if (Number.isInteger(arguments[0])) {
-	      var size = arguments[0];
-	      this._coordinates = new Array(size).fill(null);
-	      for (var i = 0; i < size; i++) {
-	        this$1._coordinates[i] = new Coordinate();
-	      }
-	    } else if (hasInterface(arguments[0], CoordinateSequence)) {
-	      var coordSeq = arguments[0];
-	      if (coordSeq === null) {
-	        this._coordinates = new Array(0).fill(null);
-	        return null
-	      }
-	      this._dimension = coordSeq.getDimension();
-	      this._coordinates = new Array(coordSeq.size()).fill(null);
-	      for (var i$1 = 0; i$1 < this._coordinates.length; i$1++) {
-	        this$1._coordinates[i$1] = coordSeq.getCoordinateCopy(i$1);
-	      }
-	    }
-	  } else if (arguments.length === 2) {
-	    if (arguments[0] instanceof Array && Number.isInteger(arguments[1])) {
-	      var coordinates = arguments[0];
-	      var dimension = arguments[1];
-	      this._coordinates = coordinates;
-	      this._dimension = dimension;
-	      if (coordinates === null) { this._coordinates = new Array(0).fill(null); }
-	    } else if (Number.isInteger(arguments[0]) && Number.isInteger(arguments[1])) {
-	      var size$1 = arguments[0];
-	      var dimension$1 = arguments[1];
-	      this._coordinates = new Array(size$1).fill(null);
-	      this._dimension = dimension$1;
-	      for (var i$2 = 0; i$2 < size$1; i$2++) {
-	        this$1._coordinates[i$2] = new Coordinate();
+	                if (branchHits && branchHits.length) {
+	                  // if "branch" matched something else in NSI..
+	                  if (branchHits[0].match === 'primary' || branchHits[0].match === 'alternate') {
+	                    // if another brand! (e.g. "KFC - Taco Bell"?)
+	                    return {
+	                      v: null
+	                    }; //   bail out - can't suggest tags in this case
+	                  } // else a generic (e.g. "gas", "cafe") - ignore
+
+	                } else {
+	                  // "branch" is not noise and not something in NSI
+	                  newTags.branch = branch; // Stick it in the `branch` tag..
+	                }
+	              }
+	            }
+
+	            break;
+	          }
+	        }
 	      }
 	    }
-	  }
-	};
 
-	var staticAccessors$18 = { serialVersionUID: { configurable: true } };
-	CoordinateArraySequence.prototype.setOrdinate = function setOrdinate (index, ordinateIndex, value) {
-	  switch (ordinateIndex) {
-	    case CoordinateSequence.X:
-	      this._coordinates[index].x = value;
-	      break
-	    case CoordinateSequence.Y:
-	      this._coordinates[index].y = value;
-	      break
-	    case CoordinateSequence.Z:
-	      this._coordinates[index].z = value;
-	      break
-	    default:
-	      throw new IllegalArgumentException('invalid ordinateIndex')
-	  }
-	};
-	CoordinateArraySequence.prototype.size = function size () {
-	  return this._coordinates.length
-	};
-	CoordinateArraySequence.prototype.getOrdinate = function getOrdinate (index, ordinateIndex) {
-	  switch (ordinateIndex) {
-	    case CoordinateSequence.X:
-	      return this._coordinates[index].x
-	    case CoordinateSequence.Y:
-	      return this._coordinates[index].y
-	    case CoordinateSequence.Z:
-	      return this._coordinates[index].z
-	  }
-	  return Double.NaN
-	};
-	CoordinateArraySequence.prototype.getCoordinate = function getCoordinate () {
-	  if (arguments.length === 1) {
-	    var i = arguments[0];
-	    return this._coordinates[i]
-	  } else if (arguments.length === 2) {
-	    var index = arguments[0];
-	    var coord = arguments[1];
-	    coord.x = this._coordinates[index].x;
-	    coord.y = this._coordinates[index].y;
-	    coord.z = this._coordinates[index].z;
-	  }
-	};
-	CoordinateArraySequence.prototype.getCoordinateCopy = function getCoordinateCopy (i) {
-	  return new Coordinate(this._coordinates[i])
-	};
-	CoordinateArraySequence.prototype.getDimension = function getDimension () {
-	  return this._dimension
-	};
-	CoordinateArraySequence.prototype.getX = function getX (index) {
-	  return this._coordinates[index].x
-	};
-	CoordinateArraySequence.prototype.clone = function clone () {
-	    var this$1 = this;
+	    return {
+	      v: {
+	        newTags: newTags,
+	        matched: item
+	      }
+	    };
+	  };
 
-	  var cloneCoordinates = new Array(this.size()).fill(null);
-	  for (var i = 0; i < this._coordinates.length; i++) {
-	    cloneCoordinates[i] = this$1._coordinates[i].clone();
-	  }
-	  return new CoordinateArraySequence(cloneCoordinates, this._dimension)
-	};
-	CoordinateArraySequence.prototype.expandEnvelope = function expandEnvelope (env) {
-	    var this$1 = this;
+	  for (var i = 0; i < tuples.length; i++) {
+	    var _ret = _loop(i);
 
-	  for (var i = 0; i < this._coordinates.length; i++) {
-	    env.expandToInclude(this$1._coordinates[i]);
+	    if (_ret === "continue") continue;
+	    if (_ret === "break") break;
+	    if (_typeof(_ret) === "object") return _ret.v;
 	  }
-	  return env
-	};
-	CoordinateArraySequence.prototype.copy = function copy () {
-	    var this$1 = this;
 
-	  var cloneCoordinates = new Array(this.size()).fill(null);
-	  for (var i = 0; i < this._coordinates.length; i++) {
-	    cloneCoordinates[i] = this$1._coordinates[i].copy();
-	  }
-	  return new CoordinateArraySequence(cloneCoordinates, this._dimension)
-	};
-	CoordinateArraySequence.prototype.toString = function toString () {
-	    var this$1 = this;
-
-	  if (this._coordinates.length > 0) {
-	    var strBuf = new StringBuffer(17 * this._coordinates.length);
-	    strBuf.append('(');
-	    strBuf.append(this._coordinates[0]);
-	    for (var i = 1; i < this._coordinates.length; i++) {
-	      strBuf.append(', ');
-	      strBuf.append(this$1._coordinates[i]);
-	    }
-	    strBuf.append(')');
-	    return strBuf.toString()
-	  } else {
-	    return '()'
-	  }
-	};
-	CoordinateArraySequence.prototype.getY = function getY (index) {
-	  return this._coordinates[index].y
-	};
-	CoordinateArraySequence.prototype.toCoordinateArray = function toCoordinateArray () {
-	  return this._coordinates
-	};
-	CoordinateArraySequence.prototype.interfaces_ = function interfaces_ () {
-	  return [CoordinateSequence, Serializable]
-	};
-	CoordinateArraySequence.prototype.getClass = function getClass () {
-	  return CoordinateArraySequence
-	};
-	staticAccessors$18.serialVersionUID.get = function () { return -915438501601840650 };
+	  return changed ? {
+	    newTags: newTags,
+	    matched: null
+	  } : null;
+	} // `_isGenericName()`
+	// Is the `name` tag generic?
+	//
+	// Arguments
+	//   `tags`: `Object` containing the feature's OSM tags
+	// Returns
+	//   `true` if it is generic, `false` if not
+	//
 
-	Object.defineProperties( CoordinateArraySequence, staticAccessors$18 );
 
-	var CoordinateArraySequenceFactory = function CoordinateArraySequenceFactory () {};
+	function _isGenericName(tags) {
+	  var n = tags.name;
+	  if (!n) return false; // tryNames just contains the `name` tag value and nothing else
 
-	var staticAccessors$17 = { serialVersionUID: { configurable: true },instanceObject: { configurable: true } };
+	  var tryNames = {
+	    primary: new Set([n]),
+	    alternate: new Set()
+	  }; // Gather key/value tag pairs to try to match
 
-	CoordinateArraySequenceFactory.prototype.readResolve = function readResolve () {
-	  return CoordinateArraySequenceFactory.instance()
-	};
-	CoordinateArraySequenceFactory.prototype.create = function create () {
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof Array) {
-	      var coordinates = arguments[0];
-	      return new CoordinateArraySequence(coordinates)
-	    } else if (hasInterface(arguments[0], CoordinateSequence)) {
-	      var coordSeq = arguments[0];
-	      return new CoordinateArraySequence(coordSeq)
-	    }
-	  } else if (arguments.length === 2) {
-	    var size = arguments[0];
-	    var dimension = arguments[1];
-	    if (dimension > 3) { dimension = 3; }
-	    if (dimension < 2) { return new CoordinateArraySequence(size) }
-	    return new CoordinateArraySequence(size, dimension)
-	  }
-	};
-	CoordinateArraySequenceFactory.prototype.interfaces_ = function interfaces_ () {
-	  return [CoordinateSequenceFactory, Serializable]
-	};
-	CoordinateArraySequenceFactory.prototype.getClass = function getClass () {
-	  return CoordinateArraySequenceFactory
-	};
-	CoordinateArraySequenceFactory.instance = function instance () {
-	  return CoordinateArraySequenceFactory.instanceObject
-	};
+	  var tryKVs = gatherKVs(tags);
+	  if (!tryKVs.primary.size && !tryKVs.alternate.size) return false; // Order the [key,value,name] tuples - test primary before alternate
 
-	staticAccessors$17.serialVersionUID.get = function () { return -4099577099607551657 };
-	staticAccessors$17.instanceObject.get = function () { return new CoordinateArraySequenceFactory() };
+	  var tuples = gatherTuples(tryKVs, tryNames);
 
-	Object.defineProperties( CoordinateArraySequenceFactory, staticAccessors$17 );
+	  for (var i = 0; i < tuples.length; i++) {
+	    var tuple = tuples[i];
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/HashMap.html
-	 *
-	 * @extends {javascript.util.Map}
-	 * @constructor
-	 * @private
-	 */
-	var HashMap = (function (MapInterface) {
-	  function HashMap () {
-	    MapInterface.call(this);
-	    this.map_ = new Map();
-	  }
+	    var hits = _nsi.matcher.match(tuple.k, tuple.v, tuple.n); // Attempt to match an item in NSI
+	    // If we get a `excludeGeneric` hit, this is a generic name.
 
-	  if ( MapInterface ) { HashMap.__proto__ = MapInterface; }
-	  HashMap.prototype = Object.create( MapInterface && MapInterface.prototype );
-	  HashMap.prototype.constructor = HashMap;
-	  /**
-	   * @override
-	   */
-	  HashMap.prototype.get = function get (key) {
-	    return this.map_.get(key) || null
-	  };
 
-	  /**
-	   * @override
-	   */
-	  HashMap.prototype.put = function put (key, value) {
-	    this.map_.set(key, value);
-	    return value
-	  };
+	    if (hits && hits.length && hits[0].match === 'excludeGeneric') return true;
+	  }
 
-	  /**
-	   * @override
-	   */
-	  HashMap.prototype.values = function values () {
-	    var arrayList = new ArrayList();
-	    var it = this.map_.values();
-	    var o = it.next();
-	    while (!o.done) {
-	      arrayList.add(o.value);
-	      o = it.next();
-	    }
-	    return arrayList
-	  };
+	  return false;
+	} // PUBLIC INTERFACE
 
-	  /**
-	   * @override
-	   */
-	  HashMap.prototype.entrySet = function entrySet () {
-	    var hashSet = new HashSet();
-	    this.map_.entries().forEach(function (entry) { return hashSet.add(entry); });
-	    return hashSet
-	  };
 
-	  /**
-	   * @override
-	   */
-	  HashMap.prototype.size = function size () {
-	    return this.map_.size()
-	  };
-
-	  return HashMap;
-	}(Map$1$1));
-
-	var PrecisionModel = function PrecisionModel () {
-	  this._modelType = null;
-	  this._scale = null;
-	  if (arguments.length === 0) {
-	    this._modelType = PrecisionModel.FLOATING;
-	  } else if (arguments.length === 1) {
-	    if (arguments[0] instanceof Type$2) {
-	      var modelType = arguments[0];
-	      this._modelType = modelType;
-	      if (modelType === PrecisionModel.FIXED) {
-	        this.setScale(1.0);
-	      }
-	    } else if (typeof arguments[0] === 'number') {
-	      var scale = arguments[0];
-	      this._modelType = PrecisionModel.FIXED;
-	      this.setScale(scale);
-	    } else if (arguments[0] instanceof PrecisionModel) {
-	      var pm = arguments[0];
-	      this._modelType = pm._modelType;
-	      this._scale = pm._scale;
+	var serviceNsi = {
+	  // `init()`
+	  // On init, start preparing the name-suggestion-index
+	  //
+	  init: function init() {
+	    // Note: service.init is called immediately after the presetManager has started loading its data.
+	    // We expect to chain onto an unfulfilled promise here.
+	    setNsiSources();
+	    _mainPresetIndex.ensureLoaded().then(function () {
+	      return loadNsiPresets();
+	    }).then(function () {
+	      return delay(100);
+	    }) // wait briefly for locationSets to enter the locationManager queue
+	    .then(function () {
+	      return _mainLocations.mergeLocationSets([]);
+	    }) // wait for locationSets to resolve
+	    .then(function () {
+	      return loadNsiData();
+	    }).then(function () {
+	      return _nsiStatus = 'ok';
+	    })["catch"](function () {
+	      return _nsiStatus = 'failed';
+	    });
+
+	    function delay(msec) {
+	      return new Promise(function (resolve) {
+	        window.setTimeout(resolve, msec);
+	      });
 	    }
+	  },
+	  // `reset()`
+	  // Reset is called when user saves data to OSM (does nothing here)
+	  //
+	  reset: function reset() {},
+	  // `status()`
+	  // To let other code know how it's going...
+	  //
+	  // Returns
+	  //   `String`: 'loading', 'ok', 'failed'
+	  //
+	  status: function status() {
+	    return _nsiStatus;
+	  },
+	  // `isGenericName()`
+	  // Is the `name` tag generic?
+	  //
+	  // Arguments
+	  //   `tags`: `Object` containing the feature's OSM tags
+	  // Returns
+	  //   `true` if it is generic, `false` if not
+	  //
+	  isGenericName: function isGenericName(tags) {
+	    return _isGenericName(tags);
+	  },
+	  // `upgradeTags()`
+	  // Suggest tag upgrades.
+	  // This function will not modify the input tags, it makes a copy.
+	  //
+	  // Arguments
+	  //   `tags`: `Object` containing the feature's OSM tags
+	  //   `loc`: Location where this feature exists, as a [lon, lat]
+	  // Returns
+	  //   `Object` containing the result, or `null` if no changes needed:
+	  //   {
+	  //     'newTags': `Object` - The tags the the feature should have
+	  //     'matched': `Object` - The matched item
+	  //   }
+	  //
+	  upgradeTags: function upgradeTags(tags, loc) {
+	    return _upgradeTags(tags, loc);
+	  },
+	  // `cache()`
+	  // Direct access to the NSI cache, useful for testing or breaking things
+	  //
+	  // Returns
+	  //   `Object`: the internal NSI cache
+	  //
+	  cache: function cache() {
+	    return _nsi;
 	  }
 	};
 
-	var staticAccessors$19 = { serialVersionUID: { configurable: true },maximumPreciseValue: { configurable: true } };
-	PrecisionModel.prototype.equals = function equals (other) {
-	  if (!(other instanceof PrecisionModel)) {
-	    return false
-	  }
-	  var otherPrecisionModel = other;
-	  return this._modelType === otherPrecisionModel._modelType && this._scale === otherPrecisionModel._scale
-	};
-	PrecisionModel.prototype.compareTo = function compareTo (o) {
-	  var other = o;
-	  var sigDigits = this.getMaximumSignificantDigits();
-	  var otherSigDigits = other.getMaximumSignificantDigits();
-	  return new Integer(sigDigits).compareTo(new Integer(otherSigDigits))
-	};
-	PrecisionModel.prototype.getScale = function getScale () {
-	  return this._scale
-	};
-	PrecisionModel.prototype.isFloating = function isFloating () {
-	  return this._modelType === PrecisionModel.FLOATING || this._modelType === PrecisionModel.FLOATING_SINGLE
-	};
-	PrecisionModel.prototype.getType = function getType () {
-	  return this._modelType
-	};
-	PrecisionModel.prototype.toString = function toString () {
-	  var description = 'UNKNOWN';
-	  if (this._modelType === PrecisionModel.FLOATING) {
-	    description = 'Floating';
-	  } else if (this._modelType === PrecisionModel.FLOATING_SINGLE) {
-	    description = 'Floating-Single';
-	  } else if (this._modelType === PrecisionModel.FIXED) {
-	    description = 'Fixed (Scale=' + this.getScale() + ')';
-	  }
-	  return description
-	};
-	PrecisionModel.prototype.makePrecise = function makePrecise () {
-	  if (typeof arguments[0] === 'number') {
-	    var val = arguments[0];
-	    if (Double.isNaN(val)) { return val }
-	    if (this._modelType === PrecisionModel.FLOATING_SINGLE) {
-	      var floatSingleVal = val;
-	      return floatSingleVal
-	    }
-	    if (this._modelType === PrecisionModel.FIXED) {
-	      return Math.round(val * this._scale) / this._scale
-	    }
-	    return val
-	  } else if (arguments[0] instanceof Coordinate) {
-	    var coord = arguments[0];
-	    if (this._modelType === PrecisionModel.FLOATING) { return null }
-	    coord.x = this.makePrecise(coord.x);
-	    coord.y = this.makePrecise(coord.y);
-	  }
-	};
-	PrecisionModel.prototype.getMaximumSignificantDigits = function getMaximumSignificantDigits () {
-	  var maxSigDigits = 16;
-	  if (this._modelType === PrecisionModel.FLOATING) {
-	    maxSigDigits = 16;
-	  } else if (this._modelType === PrecisionModel.FLOATING_SINGLE) {
-	    maxSigDigits = 6;
-	  } else if (this._modelType === PrecisionModel.FIXED) {
-	    maxSigDigits = 1 + Math.trunc(Math.ceil(Math.log(this.getScale()) / Math.log(10)));
-	  }
-	  return maxSigDigits
-	};
-	PrecisionModel.prototype.setScale = function setScale (scale) {
-	  this._scale = Math.abs(scale);
-	};
-	PrecisionModel.prototype.interfaces_ = function interfaces_ () {
-	  return [Serializable, Comparable]
-	};
-	PrecisionModel.prototype.getClass = function getClass () {
-	  return PrecisionModel
-	};
-	PrecisionModel.mostPrecise = function mostPrecise (pm1, pm2) {
-	  if (pm1.compareTo(pm2) >= 0) { return pm1 }
-	  return pm2
-	};
-	staticAccessors$19.serialVersionUID.get = function () { return 7777263578777803835 };
-	staticAccessors$19.maximumPreciseValue.get = function () { return 9007199254740992.0 };
+	var apibase$1 = 'https://openstreetcam.org';
+	var maxResults$1 = 1000;
+	var tileZoom$1 = 14;
+	var tiler$3 = utilTiler().zoomExtent([tileZoom$1, tileZoom$1]).skipNullIsland(true);
+	var dispatch$3 = dispatch$8('loadedImages');
+	var imgZoom = d3_zoom().extent([[0, 0], [320, 240]]).translateExtent([[0, 0], [320, 240]]).scaleExtent([1, 15]);
 
-	Object.defineProperties( PrecisionModel, staticAccessors$19 );
+	var _oscCache;
 
-	var Type$2 = function Type (name) {
-	  this._name = name || null;
-	  Type.nameToTypeMap.put(name, this);
-	};
+	var _oscSelectedImage;
 
-	var staticAccessors$1$1 = { serialVersionUID: { configurable: true },nameToTypeMap: { configurable: true } };
-	Type$2.prototype.readResolve = function readResolve () {
-	  return Type$2.nameToTypeMap.get(this._name)
-	};
-	Type$2.prototype.toString = function toString () {
-	  return this._name
-	};
-	Type$2.prototype.interfaces_ = function interfaces_ () {
-	  return [Serializable]
-	};
-	Type$2.prototype.getClass = function getClass () {
-	  return Type$2
-	};
-	staticAccessors$1$1.serialVersionUID.get = function () { return -5528602631731589822 };
-	staticAccessors$1$1.nameToTypeMap.get = function () { return new HashMap() };
-
-	Object.defineProperties( Type$2, staticAccessors$1$1 );
-
-	PrecisionModel.Type = Type$2;
-	PrecisionModel.FIXED = new Type$2('FIXED');
-	PrecisionModel.FLOATING = new Type$2('FLOATING');
-	PrecisionModel.FLOATING_SINGLE = new Type$2('FLOATING SINGLE');
-
-	var GeometryFactory = function GeometryFactory () {
-	  this._precisionModel = new PrecisionModel();
-	  this._SRID = 0;
-	  this._coordinateSequenceFactory = GeometryFactory.getDefaultCoordinateSequenceFactory();
-
-	  if (arguments.length === 0) ; else if (arguments.length === 1) {
-	    if (hasInterface(arguments[0], CoordinateSequenceFactory)) {
-	      this._coordinateSequenceFactory = arguments[0];
-	    } else if (arguments[0] instanceof PrecisionModel) {
-	      this._precisionModel = arguments[0];
-	    }
-	  } else if (arguments.length === 2) {
-	    this._precisionModel = arguments[0];
-	    this._SRID = arguments[1];
-	  } else if (arguments.length === 3) {
-	    this._precisionModel = arguments[0];
-	    this._SRID = arguments[1];
-	    this._coordinateSequenceFactory = arguments[2];
-	  }
-	};
+	var _loadViewerPromise$1;
 
-	var staticAccessors$2 = { serialVersionUID: { configurable: true } };
-	GeometryFactory.prototype.toGeometry = function toGeometry (envelope) {
-	  if (envelope.isNull()) {
-	    return this.createPoint(null)
-	  }
-	  if (envelope.getMinX() === envelope.getMaxX() && envelope.getMinY() === envelope.getMaxY()) {
-	    return this.createPoint(new Coordinate(envelope.getMinX(), envelope.getMinY()))
-	  }
-	  if (envelope.getMinX() === envelope.getMaxX() || envelope.getMinY() === envelope.getMaxY()) {
-	    return this.createLineString([new Coordinate(envelope.getMinX(), envelope.getMinY()), new Coordinate(envelope.getMaxX(), envelope.getMaxY())])
-	  }
-	  return this.createPolygon(this.createLinearRing([new Coordinate(envelope.getMinX(), envelope.getMinY()), new Coordinate(envelope.getMinX(), envelope.getMaxY()), new Coordinate(envelope.getMaxX(), envelope.getMaxY()), new Coordinate(envelope.getMaxX(), envelope.getMinY()), new Coordinate(envelope.getMinX(), envelope.getMinY())]), null)
-	};
-	GeometryFactory.prototype.createLineString = function createLineString (coordinates) {
-	  if (!coordinates) { return new LineString(this.getCoordinateSequenceFactory().create([]), this) }
-	  else if (coordinates instanceof Array) { return new LineString(this.getCoordinateSequenceFactory().create(coordinates), this) }
-	  else if (hasInterface(coordinates, CoordinateSequence)) { return new LineString(coordinates, this) }
-	};
-	GeometryFactory.prototype.createMultiLineString = function createMultiLineString () {
-	  if (arguments.length === 0) {
-	    return new MultiLineString(null, this)
-	  } else if (arguments.length === 1) {
-	    var lineStrings = arguments[0];
-	    return new MultiLineString(lineStrings, this)
-	  }
-	};
-	GeometryFactory.prototype.buildGeometry = function buildGeometry (geomList) {
-	  var geomClass = null;
-	  var isHeterogeneous = false;
-	  var hasGeometryCollection = false;
-	  for (var i = geomList.iterator(); i.hasNext();) {
-	    var geom = i.next();
-	    var partClass = geom.getClass();
-	    if (geomClass === null) {
-	      geomClass = partClass;
-	    }
-	    if (partClass !== geomClass) {
-	      isHeterogeneous = true;
-	    }
-	    if (geom.isGeometryCollectionOrDerived()) { hasGeometryCollection = true; }
-	  }
-	  if (geomClass === null) {
-	    return this.createGeometryCollection()
-	  }
-	  if (isHeterogeneous || hasGeometryCollection) {
-	    return this.createGeometryCollection(GeometryFactory.toGeometryArray(geomList))
-	  }
-	  var geom0 = geomList.iterator().next();
-	  var isCollection = geomList.size() > 1;
-	  if (isCollection) {
-	    if (geom0 instanceof Polygon) {
-	      return this.createMultiPolygon(GeometryFactory.toPolygonArray(geomList))
-	    } else if (geom0 instanceof LineString) {
-	      return this.createMultiLineString(GeometryFactory.toLineStringArray(geomList))
-	    } else if (geom0 instanceof Point$1) {
-	      return this.createMultiPoint(GeometryFactory.toPointArray(geomList))
-	    }
-	    Assert.shouldNeverReachHere('Unhandled class: ' + geom0.getClass().getName());
-	  }
-	  return geom0
-	};
-	GeometryFactory.prototype.createMultiPointFromCoords = function createMultiPointFromCoords (coordinates) {
-	  return this.createMultiPoint(coordinates !== null ? this.getCoordinateSequenceFactory().create(coordinates) : null)
-	};
-	GeometryFactory.prototype.createPoint = function createPoint () {
-	  if (arguments.length === 0) {
-	    return this.createPoint(this.getCoordinateSequenceFactory().create([]))
-	  } else if (arguments.length === 1) {
-	    if (arguments[0] instanceof Coordinate) {
-	      var coordinate = arguments[0];
-	      return this.createPoint(coordinate !== null ? this.getCoordinateSequenceFactory().create([coordinate]) : null)
-	    } else if (hasInterface(arguments[0], CoordinateSequence)) {
-	      var coordinates = arguments[0];
-	      return new Point$1(coordinates, this)
-	    }
-	  }
-	};
-	GeometryFactory.prototype.getCoordinateSequenceFactory = function getCoordinateSequenceFactory () {
-	  return this._coordinateSequenceFactory
-	};
-	GeometryFactory.prototype.createPolygon = function createPolygon () {
-	  if (arguments.length === 0) {
-	    return new Polygon(null, null, this)
-	  } else if (arguments.length === 1) {
-	    if (hasInterface(arguments[0], CoordinateSequence)) {
-	      var coordinates = arguments[0];
-	      return this.createPolygon(this.createLinearRing(coordinates))
-	    } else if (arguments[0] instanceof Array) {
-	      var coordinates$1 = arguments[0];
-	      return this.createPolygon(this.createLinearRing(coordinates$1))
-	    } else if (arguments[0] instanceof LinearRing) {
-	      var shell = arguments[0];
-	      return this.createPolygon(shell, null)
-	    }
-	  } else if (arguments.length === 2) {
-	    var shell$1 = arguments[0];
-	    var holes = arguments[1];
-	    return new Polygon(shell$1, holes, this)
-	  }
-	};
-	GeometryFactory.prototype.getSRID = function getSRID () {
-	  return this._SRID
-	};
-	GeometryFactory.prototype.createGeometryCollection = function createGeometryCollection () {
-	  if (arguments.length === 0) {
-	    return new GeometryCollection(null, this)
-	  } else if (arguments.length === 1) {
-	    var geometries = arguments[0];
-	    return new GeometryCollection(geometries, this)
-	  }
-	};
-	GeometryFactory.prototype.createGeometry = function createGeometry (g) {
-	  var editor = new GeometryEditor(this);
-	  return editor.edit(g, {
-	    edit: function () {
-	      if (arguments.length === 2) {
-	        var coordSeq = arguments[0];
-	        // const geometry = arguments[1]
-	        return this._coordinateSequenceFactory.create(coordSeq)
-	      }
-	    }
-	  })
-	};
-	GeometryFactory.prototype.getPrecisionModel = function getPrecisionModel () {
-	  return this._precisionModel
-	};
-	GeometryFactory.prototype.createLinearRing = function createLinearRing () {
-	  if (arguments.length === 0) {
-	    return this.createLinearRing(this.getCoordinateSequenceFactory().create([]))
-	  } else if (arguments.length === 1) {
-	    if (arguments[0] instanceof Array) {
-	      var coordinates = arguments[0];
-	      return this.createLinearRing(coordinates !== null ? this.getCoordinateSequenceFactory().create(coordinates) : null)
-	    } else if (hasInterface(arguments[0], CoordinateSequence)) {
-	      var coordinates$1 = arguments[0];
-	      return new LinearRing(coordinates$1, this)
-	    }
-	  }
-	};
-	GeometryFactory.prototype.createMultiPolygon = function createMultiPolygon () {
-	  if (arguments.length === 0) {
-	    return new MultiPolygon(null, this)
-	  } else if (arguments.length === 1) {
-	    var polygons = arguments[0];
-	    return new MultiPolygon(polygons, this)
-	  }
-	};
-	GeometryFactory.prototype.createMultiPoint = function createMultiPoint () {
-	    var this$1 = this;
-
-	  if (arguments.length === 0) {
-	    return new MultiPoint(null, this)
-	  } else if (arguments.length === 1) {
-	    if (arguments[0] instanceof Array) {
-	      var point = arguments[0];
-	      return new MultiPoint(point, this)
-	    } else if (arguments[0] instanceof Array) {
-	      var coordinates = arguments[0];
-	      return this.createMultiPoint(coordinates !== null ? this.getCoordinateSequenceFactory().create(coordinates) : null)
-	    } else if (hasInterface(arguments[0], CoordinateSequence)) {
-	      var coordinates$1 = arguments[0];
-	      if (coordinates$1 === null) {
-	        return this.createMultiPoint(new Array(0).fill(null))
-	      }
-	      var points = new Array(coordinates$1.size()).fill(null);
-	      for (var i = 0; i < coordinates$1.size(); i++) {
-	        var ptSeq = this$1.getCoordinateSequenceFactory().create(1, coordinates$1.getDimension());
-	        CoordinateSequences.copy(coordinates$1, i, ptSeq, 0, 1);
-	        points[i] = this$1.createPoint(ptSeq);
-	      }
-	      return this.createMultiPoint(points)
-	    }
-	  }
-	};
-	GeometryFactory.prototype.interfaces_ = function interfaces_ () {
-	  return [Serializable]
-	};
-	GeometryFactory.prototype.getClass = function getClass () {
-	  return GeometryFactory
-	};
-	GeometryFactory.toMultiPolygonArray = function toMultiPolygonArray (multiPolygons) {
-	  var multiPolygonArray = new Array(multiPolygons.size()).fill(null);
-	  return multiPolygons.toArray(multiPolygonArray)
-	};
-	GeometryFactory.toGeometryArray = function toGeometryArray (geometries) {
-	  if (geometries === null) { return null }
-	  var geometryArray = new Array(geometries.size()).fill(null);
-	  return geometries.toArray(geometryArray)
-	};
-	GeometryFactory.getDefaultCoordinateSequenceFactory = function getDefaultCoordinateSequenceFactory () {
-	  return CoordinateArraySequenceFactory.instance()
-	};
-	GeometryFactory.toMultiLineStringArray = function toMultiLineStringArray (multiLineStrings) {
-	  var multiLineStringArray = new Array(multiLineStrings.size()).fill(null);
-	  return multiLineStrings.toArray(multiLineStringArray)
-	};
-	GeometryFactory.toLineStringArray = function toLineStringArray (lineStrings) {
-	  var lineStringArray = new Array(lineStrings.size()).fill(null);
-	  return lineStrings.toArray(lineStringArray)
-	};
-	GeometryFactory.toMultiPointArray = function toMultiPointArray (multiPoints) {
-	  var multiPointArray = new Array(multiPoints.size()).fill(null);
-	  return multiPoints.toArray(multiPointArray)
-	};
-	GeometryFactory.toLinearRingArray = function toLinearRingArray (linearRings) {
-	  var linearRingArray = new Array(linearRings.size()).fill(null);
-	  return linearRings.toArray(linearRingArray)
-	};
-	GeometryFactory.toPointArray = function toPointArray (points) {
-	  var pointArray = new Array(points.size()).fill(null);
-	  return points.toArray(pointArray)
-	};
-	GeometryFactory.toPolygonArray = function toPolygonArray (polygons) {
-	  var polygonArray = new Array(polygons.size()).fill(null);
-	  return polygons.toArray(polygonArray)
-	};
-	GeometryFactory.createPointFromInternalCoord = function createPointFromInternalCoord (coord, exemplar) {
-	  exemplar.getPrecisionModel().makePrecise(coord);
-	  return exemplar.getFactory().createPoint(coord)
-	};
-	staticAccessors$2.serialVersionUID.get = function () { return -6820524753094095635 };
+	function abortRequest$3(controller) {
+	  controller.abort();
+	}
 
-	Object.defineProperties( GeometryFactory, staticAccessors$2 );
+	function maxPageAtZoom(z) {
+	  if (z < 15) return 2;
+	  if (z === 15) return 5;
+	  if (z === 16) return 10;
+	  if (z === 17) return 20;
+	  if (z === 18) return 40;
+	  if (z > 18) return 80;
+	}
 
-	var geometryTypes = ['Point', 'MultiPoint', 'LineString', 'MultiLineString', 'Polygon', 'MultiPolygon'];
+	function loadTiles$1(which, url, projection) {
+	  var currZoom = Math.floor(geoScaleToZoom(projection.scale()));
+	  var tiles = tiler$3.getTiles(projection); // abort inflight requests that are no longer needed
 
-	/**
-	 * Class for reading and writing Well-Known Text.Create a new parser for GeoJSON
-	 * NOTE: Adapted from OpenLayers 2.11 implementation.
-	 */
+	  var cache = _oscCache[which];
+	  Object.keys(cache.inflight).forEach(function (k) {
+	    var wanted = tiles.find(function (tile) {
+	      return k.indexOf(tile.id + ',') === 0;
+	    });
 
-	/**
-	 * Create a new parser for GeoJSON
-	 *
-	 * @param {GeometryFactory} geometryFactory
-	 * @return An instance of GeoJsonParser.
-	 * @constructor
-	 * @private
-	 */
-	var GeoJSONParser = function GeoJSONParser (geometryFactory) {
-	  this.geometryFactory = geometryFactory || new GeometryFactory();
-	};
-	/**
-	 * Deserialize a GeoJSON object and return the Geometry or Feature(Collection) with JSTS Geometries
-	 *
-	 * @param {}
-	 *        A GeoJSON object.
-	 * @return {} A Geometry instance or object representing a Feature(Collection) with Geometry instances.
-	 * @private
-	 */
-	GeoJSONParser.prototype.read = function read (json) {
-	  var obj;
-	  if (typeof json === 'string') {
-	    obj = JSON.parse(json);
-	  } else {
-	    obj = json;
-	  }
+	    if (!wanted) {
+	      abortRequest$3(cache.inflight[k]);
+	      delete cache.inflight[k];
+	    }
+	  });
+	  tiles.forEach(function (tile) {
+	    loadNextTilePage$1(which, currZoom, url, tile);
+	  });
+	}
 
-	  var type = obj.type;
+	function loadNextTilePage$1(which, currZoom, url, tile) {
+	  var cache = _oscCache[which];
+	  var bbox = tile.extent.bbox();
+	  var maxPages = maxPageAtZoom(currZoom);
+	  var nextPage = cache.nextPage[tile.id] || 1;
+	  var params = utilQsString({
+	    ipp: maxResults$1,
+	    page: nextPage,
+	    // client_id: clientId,
+	    bbTopLeft: [bbox.maxY, bbox.minX].join(','),
+	    bbBottomRight: [bbox.minY, bbox.maxX].join(',')
+	  }, true);
+	  if (nextPage > maxPages) return;
+	  var id = tile.id + ',' + String(nextPage);
+	  if (cache.loaded[id] || cache.inflight[id]) return;
+	  var controller = new AbortController();
+	  cache.inflight[id] = controller;
+	  var options = {
+	    method: 'POST',
+	    signal: controller.signal,
+	    body: params,
+	    headers: {
+	      'Content-Type': 'application/x-www-form-urlencoded'
+	    }
+	  };
+	  d3_json(url, options).then(function (data) {
+	    cache.loaded[id] = true;
+	    delete cache.inflight[id];
 
-	  if (!parse$2[type]) {
-	    throw new Error('Unknown GeoJSON type: ' + obj.type)
-	  }
+	    if (!data || !data.currentPageItems || !data.currentPageItems.length) {
+	      throw new Error('No Data');
+	    }
 
-	  if (geometryTypes.indexOf(type) !== -1) {
-	    return parse$2[type].apply(this, [obj.coordinates])
-	  } else if (type === 'GeometryCollection') {
-	    return parse$2[type].apply(this, [obj.geometries])
-	  }
+	    var features = data.currentPageItems.map(function (item) {
+	      var loc = [+item.lng, +item.lat];
+	      var d;
 
-	  // feature or feature collection
-	  return parse$2[type].apply(this, [obj])
-	};
+	      if (which === 'images') {
+	        d = {
+	          loc: loc,
+	          key: item.id,
+	          ca: +item.heading,
+	          captured_at: item.shot_date || item.date_added,
+	          captured_by: item.username,
+	          imagePath: item.lth_name,
+	          sequence_id: item.sequence_id,
+	          sequence_index: +item.sequence_index
+	        }; // cache sequence info
 
-	/**
-	 * Serialize a Geometry object into GeoJSON
-	 *
-	 * @param {Geometry}
-	 *        geometry A Geometry or array of Geometries.
-	 * @return {Object} A GeoJSON object represting the input Geometry/Geometries.
-	 * @private
-	 */
-	GeoJSONParser.prototype.write = function write (geometry) {
-	  var type = geometry.getGeometryType();
+	        var seq = _oscCache.sequences[d.sequence_id];
 
-	  if (!extract[type]) {
-	    throw new Error('Geometry is not supported')
-	  }
+	        if (!seq) {
+	          seq = {
+	            rotation: 0,
+	            images: []
+	          };
+	          _oscCache.sequences[d.sequence_id] = seq;
+	        }
 
-	  return extract[type].apply(this, [geometry])
-	};
+	        seq.images[d.sequence_index] = d;
+	        _oscCache.images.forImageKey[d.key] = d; // cache imageKey -> image
+	      }
 
-	var parse$2 = {
-	  /**
-	   * Parse a GeoJSON Feature object
-	   *
-	   * @param {Object}
-	   *          obj Object to parse.
-	   *
-	   * @return {Object} Feature with geometry/bbox converted to JSTS Geometries.
-	   */
-	  Feature: function (obj) {
-	    var feature = {};
+	      return {
+	        minX: loc[0],
+	        minY: loc[1],
+	        maxX: loc[0],
+	        maxY: loc[1],
+	        data: d
+	      };
+	    });
+	    cache.rtree.load(features);
 
-	    // copy features
-	    for (var key in obj) {
-	      feature[key] = obj[key];
+	    if (data.currentPageItems.length === maxResults$1) {
+	      // more pages to load
+	      cache.nextPage[tile.id] = nextPage + 1;
+	      loadNextTilePage$1(which, currZoom, url, tile);
+	    } else {
+	      cache.nextPage[tile.id] = Infinity; // no more pages to load
 	    }
 
-	    // parse geometry
-	    if (obj.geometry) {
-	      var type = obj.geometry.type;
-	      if (!parse$2[type]) {
-	        throw new Error('Unknown GeoJSON type: ' + obj.type)
-	      }
-	      feature.geometry = this.read(obj.geometry);
+	    if (which === 'images') {
+	      dispatch$3.call('loadedImages');
 	    }
+	  })["catch"](function () {
+	    cache.loaded[id] = true;
+	    delete cache.inflight[id];
+	  });
+	} // partition viewport into higher zoom tiles
 
-	    // bbox
-	    if (obj.bbox) {
-	      feature.bbox = parse$2.bbox.apply(this, [obj.bbox]);
-	    }
 
-	    return feature
-	  },
+	function partitionViewport$1(projection) {
+	  var z = geoScaleToZoom(projection.scale());
+	  var z2 = Math.ceil(z * 2) / 2 + 2.5; // round to next 0.5 and add 2.5
 
-	  /**
-	   * Parse a GeoJSON FeatureCollection object
-	   *
-	   * @param {Object}
-	   *          obj Object to parse.
-	   *
-	   * @return {Object} FeatureCollection with geometry/bbox converted to JSTS Geometries.
-	   */
-	  FeatureCollection: function (obj) {
-	    var this$1 = this;
+	  var tiler = utilTiler().zoomExtent([z2, z2]);
+	  return tiler.getTiles(projection).map(function (tile) {
+	    return tile.extent;
+	  });
+	} // no more than `limit` results per partition.
 
-	    var featureCollection = {};
 
-	    if (obj.features) {
-	      featureCollection.features = [];
+	function searchLimited$1(limit, projection, rtree) {
+	  limit = limit || 5;
+	  return partitionViewport$1(projection).reduce(function (result, extent) {
+	    var found = rtree.search(extent.bbox()).slice(0, limit).map(function (d) {
+	      return d.data;
+	    });
+	    return found.length ? result.concat(found) : result;
+	  }, []);
+	}
 
-	      for (var i = 0; i < obj.features.length; ++i) {
-	        featureCollection.features.push(this$1.read(obj.features[i]));
-	      }
+	var serviceOpenstreetcam = {
+	  init: function init() {
+	    if (!_oscCache) {
+	      this.reset();
 	    }
 
-	    if (obj.bbox) {
-	      featureCollection.bbox = this.parse.bbox.apply(this, [obj.bbox]);
+	    this.event = utilRebind(this, dispatch$3, 'on');
+	  },
+	  reset: function reset() {
+	    if (_oscCache) {
+	      Object.values(_oscCache.images.inflight).forEach(abortRequest$3);
 	    }
 
-	    return featureCollection
+	    _oscCache = {
+	      images: {
+	        inflight: {},
+	        loaded: {},
+	        nextPage: {},
+	        rtree: new RBush(),
+	        forImageKey: {}
+	      },
+	      sequences: {}
+	    };
+	    _oscSelectedImage = null;
 	  },
-
-	  /**
-	   * Convert the ordinates in an array to an array of Coordinates
-	   *
-	   * @param {Array}
-	   *          array Array with {Number}s.
-	   *
-	   * @return {Array} Array with Coordinates.
-	   */
-	  coordinates: function (array) {
-	    var coordinates = [];
-	    for (var i = 0; i < array.length; ++i) {
-	      var sub = array[i];
-	      coordinates.push(new Coordinate(sub[0], sub[1]));
-	    }
-	    return coordinates
+	  images: function images(projection) {
+	    var limit = 5;
+	    return searchLimited$1(limit, projection, _oscCache.images.rtree);
 	  },
+	  sequences: function sequences(projection) {
+	    var viewport = projection.clipExtent();
+	    var min = [viewport[0][0], viewport[1][1]];
+	    var max = [viewport[1][0], viewport[0][1]];
+	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	    var sequenceKeys = {}; // all sequences for images in viewport
 
-	  /**
-	   * Convert the bbox to a LinearRing
-	   *
-	   * @param {Array}
-	   *          array Array with [xMin, yMin, xMax, yMax].
-	   *
-	   * @return {Array} Array with Coordinates.
-	   */
-	  bbox: function (array) {
-	    return this.geometryFactory.createLinearRing([
-	      new Coordinate(array[0], array[1]),
-	      new Coordinate(array[2], array[1]),
-	      new Coordinate(array[2], array[3]),
-	      new Coordinate(array[0], array[3]),
-	      new Coordinate(array[0], array[1])
-	    ])
-	  },
+	    _oscCache.images.rtree.search(bbox).forEach(function (d) {
+	      sequenceKeys[d.data.sequence_id] = true;
+	    }); // make linestrings from those sequences
 
-	  /**
-	   * Convert an Array with ordinates to a Point
-	   *
-	   * @param {Array}
-	   *          array Array with ordinates.
-	   *
-	   * @return {Point} Point.
-	   */
-	  Point: function (array) {
-	    var coordinate = new Coordinate(array[0], array[1]);
-	    return this.geometryFactory.createPoint(coordinate)
+
+	    var lineStrings = [];
+	    Object.keys(sequenceKeys).forEach(function (sequenceKey) {
+	      var seq = _oscCache.sequences[sequenceKey];
+	      var images = seq && seq.images;
+
+	      if (images) {
+	        lineStrings.push({
+	          type: 'LineString',
+	          coordinates: images.map(function (d) {
+	            return d.loc;
+	          }).filter(Boolean),
+	          properties: {
+	            captured_at: images[0] ? images[0].captured_at : null,
+	            captured_by: images[0] ? images[0].captured_by : null,
+	            key: sequenceKey
+	          }
+	        });
+	      }
+	    });
+	    return lineStrings;
+	  },
+	  cachedImage: function cachedImage(imageKey) {
+	    return _oscCache.images.forImageKey[imageKey];
+	  },
+	  loadImages: function loadImages(projection) {
+	    var url = apibase$1 + '/1.0/list/nearby-photos/';
+	    loadTiles$1('images', url, projection);
 	  },
+	  ensureViewerLoaded: function ensureViewerLoaded(context) {
+	    if (_loadViewerPromise$1) return _loadViewerPromise$1; // add osc-wrapper
 
-	  /**
-	   * Convert an Array with coordinates to a MultiPoint
-	   *
-	   * @param {Array}
-	   *          array Array with coordinates.
-	   *
-	   * @return {MultiPoint} MultiPoint.
-	   */
-	  MultiPoint: function (array) {
-	    var this$1 = this;
+	    var wrap = context.container().select('.photoviewer').selectAll('.osc-wrapper').data([0]);
+	    var that = this;
+	    var wrapEnter = wrap.enter().append('div').attr('class', 'photo-wrapper osc-wrapper').classed('hide', true).call(imgZoom.on('zoom', zoomPan)).on('dblclick.zoom', null);
+	    wrapEnter.append('div').attr('class', 'photo-attribution fillD');
+	    var controlsEnter = wrapEnter.append('div').attr('class', 'photo-controls-wrap').append('div').attr('class', 'photo-controls');
+	    controlsEnter.append('button').on('click.back', step(-1)).html('◄');
+	    controlsEnter.append('button').on('click.rotate-ccw', rotate(-90)).html('⤿');
+	    controlsEnter.append('button').on('click.rotate-cw', rotate(90)).html('⤾');
+	    controlsEnter.append('button').on('click.forward', step(1)).html('►');
+	    wrapEnter.append('div').attr('class', 'osc-image-wrap'); // Register viewer resize handler
+
+	    context.ui().photoviewer.on('resize.openstreetcam', function (dimensions) {
+	      imgZoom = d3_zoom().extent([[0, 0], dimensions]).translateExtent([[0, 0], dimensions]).scaleExtent([1, 15]).on('zoom', zoomPan);
+	    });
 
-	    var points = [];
-	    for (var i = 0; i < array.length; ++i) {
-	      points.push(parse$2.Point.apply(this$1, [array[i]]));
+	    function zoomPan(d3_event) {
+	      var t = d3_event.transform;
+	      context.container().select('.photoviewer .osc-image-wrap').call(utilSetTransform, t.x, t.y, t.k);
+	    }
+
+	    function rotate(deg) {
+	      return function () {
+	        if (!_oscSelectedImage) return;
+	        var sequenceKey = _oscSelectedImage.sequence_id;
+	        var sequence = _oscCache.sequences[sequenceKey];
+	        if (!sequence) return;
+	        var r = sequence.rotation || 0;
+	        r += deg;
+	        if (r > 180) r -= 360;
+	        if (r < -180) r += 360;
+	        sequence.rotation = r;
+	        var wrap = context.container().select('.photoviewer .osc-wrapper');
+	        wrap.transition().duration(100).call(imgZoom.transform, identity$2);
+	        wrap.selectAll('.osc-image').transition().duration(100).style('transform', 'rotate(' + r + 'deg)');
+	      };
 	    }
-	    return this.geometryFactory.createMultiPoint(points)
+
+	    function step(stepBy) {
+	      return function () {
+	        if (!_oscSelectedImage) return;
+	        var sequenceKey = _oscSelectedImage.sequence_id;
+	        var sequence = _oscCache.sequences[sequenceKey];
+	        if (!sequence) return;
+	        var nextIndex = _oscSelectedImage.sequence_index + stepBy;
+	        var nextImage = sequence.images[nextIndex];
+	        if (!nextImage) return;
+	        context.map().centerEase(nextImage.loc);
+	        that.selectImage(context, nextImage.key);
+	      };
+	    } // don't need any async loading so resolve immediately
+
+
+	    _loadViewerPromise$1 = Promise.resolve();
+	    return _loadViewerPromise$1;
 	  },
+	  showViewer: function showViewer(context) {
+	    var viewer = context.container().select('.photoviewer').classed('hide', false);
+	    var isHidden = viewer.selectAll('.photo-wrapper.osc-wrapper.hide').size();
 
-	  /**
-	   * Convert an Array with coordinates to a LineString
-	   *
-	   * @param {Array}
-	   *          array Array with coordinates.
-	   *
-	   * @return {LineString} LineString.
-	   */
-	  LineString: function (array) {
-	    var coordinates = parse$2.coordinates.apply(this, [array]);
-	    return this.geometryFactory.createLineString(coordinates)
+	    if (isHidden) {
+	      viewer.selectAll('.photo-wrapper:not(.osc-wrapper)').classed('hide', true);
+	      viewer.selectAll('.photo-wrapper.osc-wrapper').classed('hide', false);
+	    }
+
+	    return this;
+	  },
+	  hideViewer: function hideViewer(context) {
+	    _oscSelectedImage = null;
+	    this.updateUrlImage(null);
+	    var viewer = context.container().select('.photoviewer');
+	    if (!viewer.empty()) viewer.datum(null);
+	    viewer.classed('hide', true).selectAll('.photo-wrapper').classed('hide', true);
+	    context.container().selectAll('.viewfield-group, .sequence, .icon-sign').classed('currentView', false);
+	    return this.setStyles(context, null, true);
 	  },
+	  selectImage: function selectImage(context, imageKey) {
+	    var d = this.cachedImage(imageKey);
+	    _oscSelectedImage = d;
+	    this.updateUrlImage(imageKey);
+	    var viewer = context.container().select('.photoviewer');
+	    if (!viewer.empty()) viewer.datum(d);
+	    this.setStyles(context, null, true);
+	    context.container().selectAll('.icon-sign').classed('currentView', false);
+	    if (!d) return this;
+	    var wrap = context.container().select('.photoviewer .osc-wrapper');
+	    var imageWrap = wrap.selectAll('.osc-image-wrap');
+	    var attribution = wrap.selectAll('.photo-attribution').html('');
+	    wrap.transition().duration(100).call(imgZoom.transform, identity$2);
+	    imageWrap.selectAll('.osc-image').remove();
 
-	  /**
-	   * Convert an Array with coordinates to a MultiLineString
-	   *
-	   * @param {Array}
-	   *          array Array with coordinates.
-	   *
-	   * @return {MultiLineString} MultiLineString.
-	   */
-	  MultiLineString: function (array) {
-	    var this$1 = this;
+	    if (d) {
+	      var sequence = _oscCache.sequences[d.sequence_id];
+	      var r = sequence && sequence.rotation || 0;
+	      imageWrap.append('img').attr('class', 'osc-image').attr('src', apibase$1 + '/' + d.imagePath).style('transform', 'rotate(' + r + 'deg)');
 
-	    var lineStrings = [];
-	    for (var i = 0; i < array.length; ++i) {
-	      lineStrings.push(parse$2.LineString.apply(this$1, [array[i]]));
+	      if (d.captured_by) {
+	        attribution.append('a').attr('class', 'captured_by').attr('target', '_blank').attr('href', 'https://openstreetcam.org/user/' + encodeURIComponent(d.captured_by)).html('@' + d.captured_by);
+	        attribution.append('span').html('|');
+	      }
+
+	      if (d.captured_at) {
+	        attribution.append('span').attr('class', 'captured_at').html(localeDateString(d.captured_at));
+	        attribution.append('span').html('|');
+	      }
+
+	      attribution.append('a').attr('class', 'image-link').attr('target', '_blank').attr('href', 'https://openstreetcam.org/details/' + d.sequence_id + '/' + d.sequence_index).html('openstreetcam.org');
 	    }
-	    return this.geometryFactory.createMultiLineString(lineStrings)
-	  },
 
-	  /**
-	   * Convert an Array to a Polygon
-	   *
-	   * @param {Array}
-	   *          array Array with shell and holes.
-	   *
-	   * @return {Polygon} Polygon.
-	   */
-	  Polygon: function (array) {
-	    var this$1 = this;
+	    return this;
 
-	    var shellCoordinates = parse$2.coordinates.apply(this, [array[0]]);
-	    var shell = this.geometryFactory.createLinearRing(shellCoordinates);
-	    var holes = [];
-	    for (var i = 1; i < array.length; ++i) {
-	      var hole = array[i];
-	      var coordinates = parse$2.coordinates.apply(this$1, [hole]);
-	      var linearRing = this$1.geometryFactory.createLinearRing(coordinates);
-	      holes.push(linearRing);
+	    function localeDateString(s) {
+	      if (!s) return null;
+	      var options = {
+	        day: 'numeric',
+	        month: 'short',
+	        year: 'numeric'
+	      };
+	      var d = new Date(s);
+	      if (isNaN(d.getTime())) return null;
+	      return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
 	    }
-	    return this.geometryFactory.createPolygon(shell, holes)
 	  },
+	  getSelectedImage: function getSelectedImage() {
+	    return _oscSelectedImage;
+	  },
+	  getSequenceKeyForImage: function getSequenceKeyForImage(d) {
+	    return d && d.sequence_id;
+	  },
+	  // Updates the currently highlighted sequence and selected bubble.
+	  // Reset is only necessary when interacting with the viewport because
+	  // this implicitly changes the currently selected bubble/sequence
+	  setStyles: function setStyles(context, hovered, reset) {
+	    if (reset) {
+	      // reset all layers
+	      context.container().selectAll('.viewfield-group').classed('highlighted', false).classed('hovered', false).classed('currentView', false);
+	      context.container().selectAll('.sequence').classed('highlighted', false).classed('currentView', false);
+	    }
+
+	    var hoveredImageKey = hovered && hovered.key;
+	    var hoveredSequenceKey = this.getSequenceKeyForImage(hovered);
+	    var hoveredSequence = hoveredSequenceKey && _oscCache.sequences[hoveredSequenceKey];
+	    var hoveredImageKeys = hoveredSequence && hoveredSequence.images.map(function (d) {
+	      return d.key;
+	    }) || [];
+	    var viewer = context.container().select('.photoviewer');
+	    var selected = viewer.empty() ? undefined : viewer.datum();
+	    var selectedImageKey = selected && selected.key;
+	    var selectedSequenceKey = this.getSequenceKeyForImage(selected);
+	    var selectedSequence = selectedSequenceKey && _oscCache.sequences[selectedSequenceKey];
+	    var selectedImageKeys = selectedSequence && selectedSequence.images.map(function (d) {
+	      return d.key;
+	    }) || []; // highlight sibling viewfields on either the selected or the hovered sequences
+
+	    var highlightedImageKeys = utilArrayUnion(hoveredImageKeys, selectedImageKeys);
+	    context.container().selectAll('.layer-openstreetcam .viewfield-group').classed('highlighted', function (d) {
+	      return highlightedImageKeys.indexOf(d.key) !== -1;
+	    }).classed('hovered', function (d) {
+	      return d.key === hoveredImageKey;
+	    }).classed('currentView', function (d) {
+	      return d.key === selectedImageKey;
+	    });
+	    context.container().selectAll('.layer-openstreetcam .sequence').classed('highlighted', function (d) {
+	      return d.properties.key === hoveredSequenceKey;
+	    }).classed('currentView', function (d) {
+	      return d.properties.key === selectedSequenceKey;
+	    }); // update viewfields if needed
 
-	  /**
-	   * Convert an Array to a MultiPolygon
-	   *
-	   * @param {Array}
-	   *          array Array of arrays with shell and rings.
-	   *
-	   * @return {MultiPolygon} MultiPolygon.
-	   */
-	  MultiPolygon: function (array) {
-	    var this$1 = this;
+	    context.container().selectAll('.layer-openstreetcam .viewfield-group .viewfield').attr('d', viewfieldPath);
+
+	    function viewfieldPath() {
+	      var d = this.parentNode.__data__;
 
-	    var polygons = [];
-	    for (var i = 0; i < array.length; ++i) {
-	      var polygon = array[i];
-	      polygons.push(parse$2.Polygon.apply(this$1, [polygon]));
+	      if (d.pano && d.key !== selectedImageKey) {
+	        return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+	      } else {
+	        return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+	      }
 	    }
-	    return this.geometryFactory.createMultiPolygon(polygons)
+
+	    return this;
 	  },
+	  updateUrlImage: function updateUrlImage(imageKey) {
+	    if (!window.mocha) {
+	      var hash = utilStringQs(window.location.hash);
 
-	  /**
-	   * Convert an Array to a GeometryCollection
-	   *
-	   * @param {Array}
-	   *          array Array of GeoJSON geometries.
-	   *
-	   * @return {GeometryCollection} GeometryCollection.
-	   */
-	  GeometryCollection: function (array) {
-	    var this$1 = this;
+	      if (imageKey) {
+	        hash.photo = 'openstreetcam/' + imageKey;
+	      } else {
+	        delete hash.photo;
+	      }
 
-	    var geometries = [];
-	    for (var i = 0; i < array.length; ++i) {
-	      var geometry = array[i];
-	      geometries.push(this$1.read(geometry));
+	      window.location.replace('#' + utilQsString(hash, true));
 	    }
-	    return this.geometryFactory.createGeometryCollection(geometries)
+	  },
+	  cache: function cache() {
+	    return _oscCache;
 	  }
 	};
 
-	var extract = {
-	  /**
-	   * Convert a Coordinate to an Array
-	   *
-	   * @param {Coordinate}
-	   *          coordinate Coordinate to convert.
-	   *
-	   * @return {Array} Array of ordinates.
-	   */
-	  coordinate: function (coordinate) {
-	    return [coordinate.x, coordinate.y]
-	  },
+	var hashes$1 = {exports: {}};
 
-	  /**
-	   * Convert a Point to a GeoJSON object
-	   *
-	   * @param {Point}
-	   *          point Point to convert.
-	   *
-	   * @return {Array} Array of 2 ordinates (paired to a coordinate).
-	   */
-	  Point: function (point) {
-	    var array = extract.coordinate.apply(this, [point.getCoordinate()]);
-	    return {
-	      type: 'Point',
-	      coordinates: array
+	(function (module, exports) {
+	  (function () {
+	    var Hashes;
+
+	    function utf8Encode(str) {
+	      var x,
+	          y,
+	          output = '',
+	          i = -1,
+	          l;
+
+	      if (str && str.length) {
+	        l = str.length;
+
+	        while ((i += 1) < l) {
+	          /* Decode utf-16 surrogate pairs */
+	          x = str.charCodeAt(i);
+	          y = i + 1 < l ? str.charCodeAt(i + 1) : 0;
+
+	          if (0xD800 <= x && x <= 0xDBFF && 0xDC00 <= y && y <= 0xDFFF) {
+	            x = 0x10000 + ((x & 0x03FF) << 10) + (y & 0x03FF);
+	            i += 1;
+	          }
+	          /* Encode output as utf-8 */
+
+
+	          if (x <= 0x7F) {
+	            output += String.fromCharCode(x);
+	          } else if (x <= 0x7FF) {
+	            output += String.fromCharCode(0xC0 | x >>> 6 & 0x1F, 0x80 | x & 0x3F);
+	          } else if (x <= 0xFFFF) {
+	            output += String.fromCharCode(0xE0 | x >>> 12 & 0x0F, 0x80 | x >>> 6 & 0x3F, 0x80 | x & 0x3F);
+	          } else if (x <= 0x1FFFFF) {
+	            output += String.fromCharCode(0xF0 | x >>> 18 & 0x07, 0x80 | x >>> 12 & 0x3F, 0x80 | x >>> 6 & 0x3F, 0x80 | x & 0x3F);
+	          }
+	        }
+	      }
+
+	      return output;
 	    }
-	  },
 
-	  /**
-	   * Convert a MultiPoint to a GeoJSON object
-	   *
-	   * @param {MultiPoint}
-	   *          multipoint MultiPoint to convert.
-	   *
-	   * @return {Array} Array of coordinates.
-	   */
-	  MultiPoint: function (multipoint) {
-	    var this$1 = this;
+	    function utf8Decode(str) {
+	      var i,
+	          ac,
+	          c1,
+	          c2,
+	          c3,
+	          arr = [],
+	          l;
+	      i = ac = c1 = c2 = c3 = 0;
+
+	      if (str && str.length) {
+	        l = str.length;
+	        str += '';
+
+	        while (i < l) {
+	          c1 = str.charCodeAt(i);
+	          ac += 1;
+
+	          if (c1 < 128) {
+	            arr[ac] = String.fromCharCode(c1);
+	            i += 1;
+	          } else if (c1 > 191 && c1 < 224) {
+	            c2 = str.charCodeAt(i + 1);
+	            arr[ac] = String.fromCharCode((c1 & 31) << 6 | c2 & 63);
+	            i += 2;
+	          } else {
+	            c2 = str.charCodeAt(i + 1);
+	            c3 = str.charCodeAt(i + 2);
+	            arr[ac] = String.fromCharCode((c1 & 15) << 12 | (c2 & 63) << 6 | c3 & 63);
+	            i += 3;
+	          }
+	        }
+	      }
 
-	    var array = [];
-	    for (var i = 0; i < multipoint._geometries.length; ++i) {
-	      var point = multipoint._geometries[i];
-	      var geoJson = extract.Point.apply(this$1, [point]);
-	      array.push(geoJson.coordinates);
-	    }
-	    return {
-	      type: 'MultiPoint',
-	      coordinates: array
+	      return arr.join('');
 	    }
-	  },
+	    /**
+	     * Add integers, wrapping at 2^32. This uses 16-bit operations internally
+	     * to work around bugs in some JS interpreters.
+	     */
 
-	  /**
-	   * Convert a LineString to a GeoJSON object
-	   *
-	   * @param {LineString}
-	   *          linestring LineString to convert.
-	   *
-	   * @return {Array} Array of coordinates.
-	   */
-	  LineString: function (linestring) {
-	    var this$1 = this;
 
-	    var array = [];
-	    var coordinates = linestring.getCoordinates();
-	    for (var i = 0; i < coordinates.length; ++i) {
-	      var coordinate = coordinates[i];
-	      array.push(extract.coordinate.apply(this$1, [coordinate]));
-	    }
-	    return {
-	      type: 'LineString',
-	      coordinates: array
+	    function safe_add(x, y) {
+	      var lsw = (x & 0xFFFF) + (y & 0xFFFF),
+	          msw = (x >> 16) + (y >> 16) + (lsw >> 16);
+	      return msw << 16 | lsw & 0xFFFF;
 	    }
-	  },
+	    /**
+	     * Bitwise rotate a 32-bit number to the left.
+	     */
 
-	  /**
-	   * Convert a MultiLineString to a GeoJSON object
-	   *
-	   * @param {MultiLineString}
-	   *          multilinestring MultiLineString to convert.
-	   *
-	   * @return {Array} Array of Array of coordinates.
-	   */
-	  MultiLineString: function (multilinestring) {
-	    var this$1 = this;
 
-	    var array = [];
-	    for (var i = 0; i < multilinestring._geometries.length; ++i) {
-	      var linestring = multilinestring._geometries[i];
-	      var geoJson = extract.LineString.apply(this$1, [linestring]);
-	      array.push(geoJson.coordinates);
-	    }
-	    return {
-	      type: 'MultiLineString',
-	      coordinates: array
+	    function bit_rol(num, cnt) {
+	      return num << cnt | num >>> 32 - cnt;
 	    }
-	  },
+	    /**
+	     * Convert a raw string to a hex string
+	     */
 
-	  /**
-	   * Convert a Polygon to a GeoJSON object
-	   *
-	   * @param {Polygon}
-	   *          polygon Polygon to convert.
-	   *
-	   * @return {Array} Array with shell, holes.
-	   */
-	  Polygon: function (polygon) {
-	    var this$1 = this;
 
-	    var array = [];
-	    var shellGeoJson = extract.LineString.apply(this, [polygon._shell]);
-	    array.push(shellGeoJson.coordinates);
-	    for (var i = 0; i < polygon._holes.length; ++i) {
-	      var hole = polygon._holes[i];
-	      var holeGeoJson = extract.LineString.apply(this$1, [hole]);
-	      array.push(holeGeoJson.coordinates);
-	    }
-	    return {
-	      type: 'Polygon',
-	      coordinates: array
-	    }
-	  },
+	    function rstr2hex(input, hexcase) {
+	      var hex_tab = hexcase ? '0123456789ABCDEF' : '0123456789abcdef',
+	          output = '',
+	          x,
+	          i = 0,
+	          l = input.length;
 
-	  /**
-	   * Convert a MultiPolygon to a GeoJSON object
-	   *
-	   * @param {MultiPolygon}
-	   *          multipolygon MultiPolygon to convert.
-	   *
-	   * @return {Array} Array of polygons.
-	   */
-	  MultiPolygon: function (multipolygon) {
-	    var this$1 = this;
+	      for (; i < l; i += 1) {
+	        x = input.charCodeAt(i);
+	        output += hex_tab.charAt(x >>> 4 & 0x0F) + hex_tab.charAt(x & 0x0F);
+	      }
 
-	    var array = [];
-	    for (var i = 0; i < multipolygon._geometries.length; ++i) {
-	      var polygon = multipolygon._geometries[i];
-	      var geoJson = extract.Polygon.apply(this$1, [polygon]);
-	      array.push(geoJson.coordinates);
+	      return output;
 	    }
-	    return {
-	      type: 'MultiPolygon',
-	      coordinates: array
-	    }
-	  },
+	    /**
+	     * Convert an array of big-endian words to a string
+	     */
 
-	  /**
-	   * Convert a GeometryCollection to a GeoJSON object
-	   *
-	   * @param {GeometryCollection}
-	   *          collection GeometryCollection to convert.
-	   *
-	   * @return {Array} Array of geometries.
-	   */
-	  GeometryCollection: function (collection) {
-	    var this$1 = this;
 
-	    var array = [];
-	    for (var i = 0; i < collection._geometries.length; ++i) {
-	      var geometry = collection._geometries[i];
-	      var type = geometry.getGeometryType();
-	      array.push(extract[type].apply(this$1, [geometry]));
-	    }
-	    return {
-	      type: 'GeometryCollection',
-	      geometries: array
+	    function binb2rstr(input) {
+	      var i,
+	          l = input.length * 32,
+	          output = '';
+
+	      for (i = 0; i < l; i += 8) {
+	        output += String.fromCharCode(input[i >> 5] >>> 24 - i % 32 & 0xFF);
+	      }
+
+	      return output;
 	    }
-	  }
-	};
+	    /**
+	     * Convert an array of little-endian words to a string
+	     */
 
-	/**
-	 * Converts a geometry in GeoJSON to a {@link Geometry}.
-	 */
 
-	/**
-	 * A <code>GeoJSONReader</code> is parameterized by a <code>GeometryFactory</code>,
-	 * to allow it to create <code>Geometry</code> objects of the appropriate
-	 * implementation. In particular, the <code>GeometryFactory</code> determines
-	 * the <code>PrecisionModel</code> and <code>SRID</code> that is used.
-	 *
-	 * @param {GeometryFactory} geometryFactory
-	 * @constructor
-	 */
-	var GeoJSONReader = function GeoJSONReader (geometryFactory) {
-	  this.geometryFactory = geometryFactory || new GeometryFactory();
-	  this.precisionModel = this.geometryFactory.getPrecisionModel();
-	  this.parser = new GeoJSONParser(this.geometryFactory);
-	};
-	/**
-	 * Reads a GeoJSON representation of a {@link Geometry}
-	 *
-	 * Will also parse GeoJSON Features/FeatureCollections as custom objects.
-	 *
-	 * @param {Object|String} geoJson a GeoJSON Object or String.
-	 * @return {Geometry|Object} a <code>Geometry or Feature/FeatureCollection representation.</code>
-	 * @memberof GeoJSONReader
-	 */
-	GeoJSONReader.prototype.read = function read (geoJson) {
-	  var geometry = this.parser.read(geoJson);
+	    function binl2rstr(input) {
+	      var i,
+	          l = input.length * 32,
+	          output = '';
 
-	  if (this.precisionModel.getType() === PrecisionModel.FIXED) {
-	    this.reducePrecision(geometry);
-	  }
+	      for (i = 0; i < l; i += 8) {
+	        output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
+	      }
 
-	  return geometry
-	};
+	      return output;
+	    }
+	    /**
+	     * Convert a raw string to an array of little-endian words
+	     * Characters >255 have their high-byte silently ignored.
+	     */
 
-	// NOTE: this is a hack
-	GeoJSONReader.prototype.reducePrecision = function reducePrecision (geometry) {
-	    var this$1 = this;
 
-	  var i, len;
+	    function rstr2binl(input) {
+	      var i,
+	          l = input.length * 8,
+	          output = Array(input.length >> 2),
+	          lo = output.length;
 
-	  if (geometry.coordinate) {
-	    this.precisionModel.makePrecise(geometry.coordinate);
-	  } else if (geometry.points) {
-	    for (i = 0, len = geometry.points.length; i < len; i++) {
-	      this$1.precisionModel.makePrecise(geometry.points[i]);
+	      for (i = 0; i < lo; i += 1) {
+	        output[i] = 0;
+	      }
+
+	      for (i = 0; i < l; i += 8) {
+	        output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << i % 32;
+	      }
+
+	      return output;
 	    }
-	  } else if (geometry.geometries) {
-	    for (i = 0, len = geometry.geometries.length; i < len; i++) {
-	      this$1.reducePrecision(geometry.geometries[i]);
+	    /**
+	     * Convert a raw string to an array of big-endian words
+	     * Characters >255 have their high-byte silently ignored.
+	     */
+
+
+	    function rstr2binb(input) {
+	      var i,
+	          l = input.length * 8,
+	          output = Array(input.length >> 2),
+	          lo = output.length;
+
+	      for (i = 0; i < lo; i += 1) {
+	        output[i] = 0;
+	      }
+
+	      for (i = 0; i < l; i += 8) {
+	        output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << 24 - i % 32;
+	      }
+
+	      return output;
 	    }
-	  }
-	};
+	    /**
+	     * Convert a raw string to an arbitrary string encoding
+	     */
 
-	/**
-	 * @module GeoJSONWriter
-	 */
 
-	/**
-	 * Writes the GeoJSON representation of a {@link Geometry}. The
-	 * The GeoJSON format is defined <A
-	 * HREF="http://geojson.org/geojson-spec.html">here</A>.
-	 */
+	    function rstr2any(input, encoding) {
+	      var divisor = encoding.length,
+	          remainders = Array(),
+	          i,
+	          q,
+	          x,
+	          ld,
+	          quotient,
+	          dividend,
+	          output,
+	          full_length;
+	      /* Convert to an array of 16-bit big-endian values, forming the dividend */
+
+	      dividend = Array(Math.ceil(input.length / 2));
+	      ld = dividend.length;
+
+	      for (i = 0; i < ld; i += 1) {
+	        dividend[i] = input.charCodeAt(i * 2) << 8 | input.charCodeAt(i * 2 + 1);
+	      }
+	      /**
+	       * Repeatedly perform a long division. The binary array forms the dividend,
+	       * the length of the encoding is the divisor. Once computed, the quotient
+	       * forms the dividend for the next step. We stop when the dividend is zerHashes.
+	       * All remainders are stored for later use.
+	       */
 
-	/**
-	 * The <code>GeoJSONWriter</code> outputs coordinates rounded to the precision
-	 * model. Only the maximum number of decimal places necessary to represent the
-	 * ordinates to the required precision will be output.
-	 *
-	 * @param {GeometryFactory} geometryFactory
-	 * @constructor
-	 */
-	var GeoJSONWriter = function GeoJSONWriter () {
-	  this.parser = new GeoJSONParser(this.geometryFactory);
-	};
-	/**
-	 * Converts a <code>Geometry</code> to its GeoJSON representation.
-	 *
-	 * @param {Geometry}
-	 *        geometry a <code>Geometry</code> to process.
-	 * @return {Object} The GeoJSON representation of the Geometry.
-	 * @memberof GeoJSONWriter
-	 */
-	GeoJSONWriter.prototype.write = function write (geometry) {
-	  return this.parser.write(geometry)
-	};
 
-	/* eslint-disable no-undef */
+	      while (dividend.length > 0) {
+	        quotient = Array();
+	        x = 0;
 
-	// io
+	        for (i = 0; i < dividend.length; i += 1) {
+	          x = (x << 16) + dividend[i];
+	          q = Math.floor(x / divisor);
+	          x -= q * divisor;
 
-	var Position = function Position () {};
+	          if (quotient.length > 0 || q > 0) {
+	            quotient[quotient.length] = q;
+	          }
+	        }
 
-	var staticAccessors$20 = { ON: { configurable: true },LEFT: { configurable: true },RIGHT: { configurable: true } };
+	        remainders[remainders.length] = x;
+	        dividend = quotient;
+	      }
+	      /* Convert the remainders to the output string */
 
-	Position.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Position.prototype.getClass = function getClass () {
-	  return Position
-	};
-	Position.opposite = function opposite (position) {
-	  if (position === Position.LEFT) { return Position.RIGHT }
-	  if (position === Position.RIGHT) { return Position.LEFT }
-	  return position
-	};
-	staticAccessors$20.ON.get = function () { return 0 };
-	staticAccessors$20.LEFT.get = function () { return 1 };
-	staticAccessors$20.RIGHT.get = function () { return 2 };
 
-	Object.defineProperties( Position, staticAccessors$20 );
+	      output = '';
 
-	/**
-	 * @param {string=} message Optional message
-	 * @extends {Error}
-	 * @constructor
-	 * @private
-	 */
-	function EmptyStackException (message) {
-	  this.message = message || '';
-	}
-	EmptyStackException.prototype = new Error();
+	      for (i = remainders.length - 1; i >= 0; i--) {
+	        output += encoding.charAt(remainders[i]);
+	      }
+	      /* Append leading zero equivalents */
 
-	/**
-	 * @type {string}
-	 */
-	EmptyStackException.prototype.name = 'EmptyStackException';
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/Stack.html
-	 *
-	 * @extends {List}
-	 * @constructor
-	 * @private
-	 */
-	function Stack () {
-	  /**
-	   * @type {Array}
-	   * @private
-	   */
-	  this.array_ = [];
-	}
-	Stack.prototype = new List();
+	      full_length = Math.ceil(input.length * 8 / (Math.log(encoding.length) / Math.log(2)));
 
-	/**
-	 * @override
-	 */
-	Stack.prototype.add = function (e) {
-	  this.array_.push(e);
-	  return true
-	};
+	      for (i = output.length; i < full_length; i += 1) {
+	        output = encoding[0] + output;
+	      }
 
-	/**
-	 * @override
-	 */
-	Stack.prototype.get = function (index) {
-	  if (index < 0 || index >= this.size()) {
-	    throw new Error()
-	  }
+	      return output;
+	    }
+	    /**
+	     * Convert a raw string to a base-64 string
+	     */
 
-	  return this.array_[index]
-	};
 
-	/**
-	 * Pushes an item onto the top of this stack.
-	 * @param {Object} e
-	 * @return {Object}
-	 */
-	Stack.prototype.push = function (e) {
-	  this.array_.push(e);
-	  return e
-	};
+	    function rstr2b64(input, b64pad) {
+	      var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
+	          output = '',
+	          len = input.length,
+	          i,
+	          j,
+	          triplet;
+	      b64pad = b64pad || '=';
+
+	      for (i = 0; i < len; i += 3) {
+	        triplet = input.charCodeAt(i) << 16 | (i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0) | (i + 2 < len ? input.charCodeAt(i + 2) : 0);
+
+	        for (j = 0; j < 4; j += 1) {
+	          if (i * 8 + j * 6 > input.length * 8) {
+	            output += b64pad;
+	          } else {
+	            output += tab.charAt(triplet >>> 6 * (3 - j) & 0x3F);
+	          }
+	        }
+	      }
 
-	/**
-	 * Pushes an item onto the top of this stack.
-	 * @param {Object} e
-	 * @return {Object}
-	 */
-	Stack.prototype.pop = function (e) {
-	  if (this.array_.length === 0) {
-	    throw new EmptyStackException()
-	  }
+	      return output;
+	    }
 
-	  return this.array_.pop()
-	};
+	    Hashes = {
+	      /**
+	       * @property {String} version
+	       * @readonly
+	       */
+	      VERSION: '1.0.6',
 
-	/**
-	 * Looks at the object at the top of this stack without removing it from the
-	 * stack.
-	 * @return {Object}
-	 */
-	Stack.prototype.peek = function () {
-	  if (this.array_.length === 0) {
-	    throw new EmptyStackException()
-	  }
+	      /**
+	       * @member Hashes
+	       * @class Base64
+	       * @constructor
+	       */
+	      Base64: function Base64() {
+	        // private properties
+	        var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
+	            pad = '=',
+	            // URL encoding support @todo
+	        utf8 = true; // by default enable UTF-8 support encoding
+	        // public method for encoding
+
+	        this.encode = function (input) {
+	          var i,
+	              j,
+	              triplet,
+	              output = '',
+	              len = input.length;
+	          pad = pad || '=';
+	          input = utf8 ? utf8Encode(input) : input;
+
+	          for (i = 0; i < len; i += 3) {
+	            triplet = input.charCodeAt(i) << 16 | (i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0) | (i + 2 < len ? input.charCodeAt(i + 2) : 0);
+
+	            for (j = 0; j < 4; j += 1) {
+	              if (i * 8 + j * 6 > len * 8) {
+	                output += pad;
+	              } else {
+	                output += tab.charAt(triplet >>> 6 * (3 - j) & 0x3F);
+	              }
+	            }
+	          }
 
-	  return this.array_[this.array_.length - 1]
-	};
+	          return output;
+	        }; // public method for decoding
+
+
+	        this.decode = function (input) {
+	          // var b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
+	          var i,
+	              o1,
+	              o2,
+	              o3,
+	              h1,
+	              h2,
+	              h3,
+	              h4,
+	              bits,
+	              ac,
+	              dec = '',
+	              arr = [];
+
+	          if (!input) {
+	            return input;
+	          }
 
-	/**
-	 * Tests if this stack is empty.
-	 * @return {boolean} true if and only if this stack contains no items; false
-	 *         otherwise.
-	 */
-	Stack.prototype.empty = function () {
-	  if (this.array_.length === 0) {
-	    return true
-	  } else {
-	    return false
-	  }
-	};
+	          i = ac = 0;
+	          input = input.replace(new RegExp('\\' + pad, 'gi'), ''); // use '='
+	          //input += '';
+
+	          do {
+	            // unpack four hexets into three octets using index points in b64
+	            h1 = tab.indexOf(input.charAt(i += 1));
+	            h2 = tab.indexOf(input.charAt(i += 1));
+	            h3 = tab.indexOf(input.charAt(i += 1));
+	            h4 = tab.indexOf(input.charAt(i += 1));
+	            bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;
+	            o1 = bits >> 16 & 0xff;
+	            o2 = bits >> 8 & 0xff;
+	            o3 = bits & 0xff;
+	            ac += 1;
+
+	            if (h3 === 64) {
+	              arr[ac] = String.fromCharCode(o1);
+	            } else if (h4 === 64) {
+	              arr[ac] = String.fromCharCode(o1, o2);
+	            } else {
+	              arr[ac] = String.fromCharCode(o1, o2, o3);
+	            }
+	          } while (i < input.length);
 
-	/**
-	 * @return {boolean}
-	 */
-	Stack.prototype.isEmpty = function () {
-	  return this.empty()
-	};
+	          dec = arr.join('');
+	          dec = utf8 ? utf8Decode(dec) : dec;
+	          return dec;
+	        }; // set custom pad string
 
-	/**
-	 * Returns the 1-based position where an object is on this stack. If the object
-	 * o occurs as an item in this stack, this method returns the distance from the
-	 * top of the stack of the occurrence nearest the top of the stack; the topmost
-	 * item on the stack is considered to be at distance 1. The equals method is
-	 * used to compare o to the items in this stack.
-	 *
-	 * NOTE: does not currently actually use equals. (=== is used)
-	 *
-	 * @param {Object} o
-	 * @return {number} the 1-based position from the top of the stack where the
-	 *         object is located; the return value -1 indicates that the object is
-	 *         not on the stack.
-	 */
-	Stack.prototype.search = function (o) {
-	  return this.array_.indexOf(o)
-	};
 
-	/**
-	 * @return {number}
-	 * @export
-	 */
-	Stack.prototype.size = function () {
-	  return this.array_.length
-	};
+	        this.setPad = function (str) {
+	          pad = str || pad;
+	          return this;
+	        }; // set custom tab string characters
 
-	/**
-	 * @return {Array}
-	 */
-	Stack.prototype.toArray = function () {
-	  var this$1 = this;
 
-	  var array = [];
+	        this.setTab = function (str) {
+	          tab = str || tab;
+	          return this;
+	        };
 
-	  for (var i = 0, len = this.array_.length; i < len; i++) {
-	    array.push(this$1.array_[i]);
-	  }
+	        this.setUTF8 = function (bool) {
+	          if (typeof bool === 'boolean') {
+	            utf8 = bool;
+	          }
 
-	  return array
-	};
+	          return this;
+	        };
+	      },
 
-	var RightmostEdgeFinder = function RightmostEdgeFinder () {
-	  this._minIndex = -1;
-	  this._minCoord = null;
-	  this._minDe = null;
-	  this._orientedDe = null;
-	};
-	RightmostEdgeFinder.prototype.getCoordinate = function getCoordinate () {
-	  return this._minCoord
-	};
-	RightmostEdgeFinder.prototype.getRightmostSide = function getRightmostSide (de, index) {
-	  var side = this.getRightmostSideOfSegment(de, index);
-	  if (side < 0) { side = this.getRightmostSideOfSegment(de, index - 1); }
-	  if (side < 0) {
-	    this._minCoord = null;
-	    this.checkForRightmostCoordinate(de);
-	  }
-	  return side
-	};
-	RightmostEdgeFinder.prototype.findRightmostEdgeAtVertex = function findRightmostEdgeAtVertex () {
-	  var pts = this._minDe.getEdge().getCoordinates();
-	  Assert.isTrue(this._minIndex > 0 && this._minIndex < pts.length, 'rightmost point expected to be interior vertex of edge');
-	  var pPrev = pts[this._minIndex - 1];
-	  var pNext = pts[this._minIndex + 1];
-	  var orientation = CGAlgorithms.computeOrientation(this._minCoord, pNext, pPrev);
-	  var usePrev = false;
-	  if (pPrev.y < this._minCoord.y && pNext.y < this._minCoord.y && orientation === CGAlgorithms.COUNTERCLOCKWISE) {
-	    usePrev = true;
-	  } else if (pPrev.y > this._minCoord.y && pNext.y > this._minCoord.y && orientation === CGAlgorithms.CLOCKWISE) {
-	    usePrev = true;
-	  }
-	  if (usePrev) {
-	    this._minIndex = this._minIndex - 1;
-	  }
-	};
-	RightmostEdgeFinder.prototype.getRightmostSideOfSegment = function getRightmostSideOfSegment (de, i) {
-	  var e = de.getEdge();
-	  var coord = e.getCoordinates();
-	  if (i < 0 || i + 1 >= coord.length) { return -1 }
-	  if (coord[i].y === coord[i + 1].y) { return -1 }
-	  var pos = Position.LEFT;
-	  if (coord[i].y < coord[i + 1].y) { pos = Position.RIGHT; }
-	  return pos
-	};
-	RightmostEdgeFinder.prototype.getEdge = function getEdge () {
-	  return this._orientedDe
-	};
-	RightmostEdgeFinder.prototype.checkForRightmostCoordinate = function checkForRightmostCoordinate (de) {
-	    var this$1 = this;
+	      /**
+	       * CRC-32 calculation
+	       * @member Hashes
+	       * @method CRC32
+	       * @static
+	       * @param {String} str Input String
+	       * @return {String}
+	       */
+	      CRC32: function CRC32(str) {
+	        var crc = 0,
+	            x = 0,
+	            y = 0,
+	            table,
+	            i,
+	            iTop;
+	        str = utf8Encode(str);
+	        table = ['00000000 77073096 EE0E612C 990951BA 076DC419 706AF48F E963A535 9E6495A3 0EDB8832 ', '79DCB8A4 E0D5E91E 97D2D988 09B64C2B 7EB17CBD E7B82D07 90BF1D91 1DB71064 6AB020F2 F3B97148 ', '84BE41DE 1ADAD47D 6DDDE4EB F4D4B551 83D385C7 136C9856 646BA8C0 FD62F97A 8A65C9EC 14015C4F ', '63066CD9 FA0F3D63 8D080DF5 3B6E20C8 4C69105E D56041E4 A2677172 3C03E4D1 4B04D447 D20D85FD ', 'A50AB56B 35B5A8FA 42B2986C DBBBC9D6 ACBCF940 32D86CE3 45DF5C75 DCD60DCF ABD13D59 26D930AC ', '51DE003A C8D75180 BFD06116 21B4F4B5 56B3C423 CFBA9599 B8BDA50F 2802B89E 5F058808 C60CD9B2 ', 'B10BE924 2F6F7C87 58684C11 C1611DAB B6662D3D 76DC4190 01DB7106 98D220BC EFD5102A 71B18589 ', '06B6B51F 9FBFE4A5 E8B8D433 7807C9A2 0F00F934 9609A88E E10E9818 7F6A0DBB 086D3D2D 91646C97 ', 'E6635C01 6B6B51F4 1C6C6162 856530D8 F262004E 6C0695ED 1B01A57B 8208F4C1 F50FC457 65B0D9C6 ', '12B7E950 8BBEB8EA FCB9887C 62DD1DDF 15DA2D49 8CD37CF3 FBD44C65 4DB26158 3AB551CE A3BC0074 ', 'D4BB30E2 4ADFA541 3DD895D7 A4D1C46D D3D6F4FB 4369E96A 346ED9FC AD678846 DA60B8D0 44042D73 ', '33031DE5 AA0A4C5F DD0D7CC9 5005713C 270241AA BE0B1010 C90C2086 5768B525 206F85B3 B966D409 ', 'CE61E49F 5EDEF90E 29D9C998 B0D09822 C7D7A8B4 59B33D17 2EB40D81 B7BD5C3B C0BA6CAD EDB88320 ', '9ABFB3B6 03B6E20C 74B1D29A EAD54739 9DD277AF 04DB2615 73DC1683 E3630B12 94643B84 0D6D6A3E ', '7A6A5AA8 E40ECF0B 9309FF9D 0A00AE27 7D079EB1 F00F9344 8708A3D2 1E01F268 6906C2FE F762575D ', '806567CB 196C3671 6E6B06E7 FED41B76 89D32BE0 10DA7A5A 67DD4ACC F9B9DF6F 8EBEEFF9 17B7BE43 ', '60B08ED5 D6D6A3E8 A1D1937E 38D8C2C4 4FDFF252 D1BB67F1 A6BC5767 3FB506DD 48B2364B D80D2BDA ', 'AF0A1B4C 36034AF6 41047A60 DF60EFC3 A867DF55 316E8EEF 4669BE79 CB61B38C BC66831A 256FD2A0 ', '5268E236 CC0C7795 BB0B4703 220216B9 5505262F C5BA3BBE B2BD0B28 2BB45A92 5CB36A04 C2D7FFA7 ', 'B5D0CF31 2CD99E8B 5BDEAE1D 9B64C2B0 EC63F226 756AA39C 026D930A 9C0906A9 EB0E363F 72076785 ', '05005713 95BF4A82 E2B87A14 7BB12BAE 0CB61B38 92D28E9B E5D5BE0D 7CDCEFB7 0BDBDF21 86D3D2D4 ', 'F1D4E242 68DDB3F8 1FDA836E 81BE16CD F6B9265B 6FB077E1 18B74777 88085AE6 FF0F6A70 66063BCA ', '11010B5C 8F659EFF F862AE69 616BFFD3 166CCF45 A00AE278 D70DD2EE 4E048354 3903B3C2 A7672661 ', 'D06016F7 4969474D 3E6E77DB AED16A4A D9D65ADC 40DF0B66 37D83BF0 A9BCAE53 DEBB9EC5 47B2CF7F ', '30B5FFE9 BDBDF21C CABAC28A 53B39330 24B4A3A6 BAD03605 CDD70693 54DE5729 23D967BF B3667A2E ', 'C4614AB8 5D681B02 2A6F2B94 B40BBE37 C30C8EA1 5A05DF1B 2D02EF8D'].join('');
+	        crc = crc ^ -1;
+
+	        for (i = 0, iTop = str.length; i < iTop; i += 1) {
+	          y = (crc ^ str.charCodeAt(i)) & 0xFF;
+	          x = '0x' + table.substr(y * 9, 8);
+	          crc = crc >>> 8 ^ x;
+	        } // always return a positive number (that's what >>> 0 does)
+
+
+	        return (crc ^ -1) >>> 0;
+	      },
 
-	  var coord = de.getEdge().getCoordinates();
-	  for (var i = 0; i < coord.length - 1; i++) {
-	    if (this$1._minCoord === null || coord[i].x > this$1._minCoord.x) {
-	      this$1._minDe = de;
-	      this$1._minIndex = i;
-	      this$1._minCoord = coord[i];
-	    }
-	  }
-	};
-	RightmostEdgeFinder.prototype.findRightmostEdgeAtNode = function findRightmostEdgeAtNode () {
-	  var node = this._minDe.getNode();
-	  var star = node.getEdges();
-	  this._minDe = star.getRightmostEdge();
-	  if (!this._minDe.isForward()) {
-	    this._minDe = this._minDe.getSym();
-	    this._minIndex = this._minDe.getEdge().getCoordinates().length - 1;
-	  }
-	};
-	RightmostEdgeFinder.prototype.findEdge = function findEdge (dirEdgeList) {
-	    var this$1 = this;
+	      /**
+	       * @member Hashes
+	       * @class MD5
+	       * @constructor
+	       * @param {Object} [config]
+	       *
+	       * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
+	       * Digest Algorithm, as defined in RFC 1321.
+	       * Version 2.2 Copyright (C) Paul Johnston 1999 - 2009
+	       * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+	       * See <http://pajhome.org.uk/crypt/md5> for more infHashes.
+	       */
+	      MD5: function MD5(options) {
+	        /**
+	         * Private config properties. You may need to tweak these to be compatible with
+	         * the server-side, but the defaults work in most cases.
+	         * See {@link Hashes.MD5#method-setUpperCase} and {@link Hashes.SHA1#method-setUpperCase}
+	         */
+	        var hexcase = options && typeof options.uppercase === 'boolean' ? options.uppercase : false,
+	            // hexadecimal output case format. false - lowercase; true - uppercase
+	        b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
+	            // base-64 pad character. Defaults to '=' for strict RFC compliance
+	        utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true; // enable/disable utf8 encoding
+	        // privileged (public) methods
+
+	        this.hex = function (s) {
+	          return rstr2hex(rstr(s), hexcase);
+	        };
 
-	  for (var i = dirEdgeList.iterator(); i.hasNext();) {
-	    var de = i.next();
-	    if (!de.isForward()) { continue }
-	    this$1.checkForRightmostCoordinate(de);
-	  }
-	  Assert.isTrue(this._minIndex !== 0 || this._minCoord.equals(this._minDe.getCoordinate()), 'inconsistency in rightmost processing');
-	  if (this._minIndex === 0) {
-	    this.findRightmostEdgeAtNode();
-	  } else {
-	    this.findRightmostEdgeAtVertex();
-	  }
-	  this._orientedDe = this._minDe;
-	  var rightmostSide = this.getRightmostSide(this._minDe, this._minIndex);
-	  if (rightmostSide === Position.LEFT) {
-	    this._orientedDe = this._minDe.getSym();
-	  }
-	};
-	RightmostEdgeFinder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	RightmostEdgeFinder.prototype.getClass = function getClass () {
-	  return RightmostEdgeFinder
-	};
+	        this.b64 = function (s) {
+	          return rstr2b64(rstr(s), b64pad);
+	        };
 
-	var TopologyException = (function (RuntimeException$$1) {
-	  function TopologyException (msg, pt) {
-	    RuntimeException$$1.call(this, TopologyException.msgWithCoord(msg, pt));
-	    this.pt = pt ? new Coordinate(pt) : null;
-	    this.name = 'TopologyException';
-	  }
+	        this.any = function (s, e) {
+	          return rstr2any(rstr(s), e);
+	        };
 
-	  if ( RuntimeException$$1 ) { TopologyException.__proto__ = RuntimeException$$1; }
-	  TopologyException.prototype = Object.create( RuntimeException$$1 && RuntimeException$$1.prototype );
-	  TopologyException.prototype.constructor = TopologyException;
-	  TopologyException.prototype.getCoordinate = function getCoordinate () {
-	    return this.pt
-	  };
-	  TopologyException.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  TopologyException.prototype.getClass = function getClass () {
-	    return TopologyException
-	  };
-	  TopologyException.msgWithCoord = function msgWithCoord (msg, pt) {
-	    if (!pt) { return msg + ' [ ' + pt + ' ]' }
-	    return msg
-	  };
+	        this.raw = function (s) {
+	          return rstr(s);
+	        };
 
-	  return TopologyException;
-	}(RuntimeException));
+	        this.hex_hmac = function (k, d) {
+	          return rstr2hex(rstr_hmac(k, d), hexcase);
+	        };
 
-	var LinkedList = function LinkedList () {
-	  this.array_ = [];
-	};
-	LinkedList.prototype.addLast = function addLast (e) {
-	  this.array_.push(e);
-	};
-	LinkedList.prototype.removeFirst = function removeFirst () {
-	  return this.array_.shift()
-	};
-	LinkedList.prototype.isEmpty = function isEmpty () {
-	  return this.array_.length === 0
-	};
+	        this.b64_hmac = function (k, d) {
+	          return rstr2b64(rstr_hmac(k, d), b64pad);
+	        };
 
-	var BufferSubgraph = function BufferSubgraph () {
-	  this._finder = null;
-	  this._dirEdgeList = new ArrayList();
-	  this._nodes = new ArrayList();
-	  this._rightMostCoord = null;
-	  this._env = null;
-	  this._finder = new RightmostEdgeFinder();
-	};
-	BufferSubgraph.prototype.clearVisitedEdges = function clearVisitedEdges () {
-	  for (var it = this._dirEdgeList.iterator(); it.hasNext();) {
-	    var de = it.next();
-	    de.setVisited(false);
-	  }
-	};
-	BufferSubgraph.prototype.getRightmostCoordinate = function getRightmostCoordinate () {
-	  return this._rightMostCoord
-	};
-	BufferSubgraph.prototype.computeNodeDepth = function computeNodeDepth (n) {
-	    var this$1 = this;
+	        this.any_hmac = function (k, d, e) {
+	          return rstr2any(rstr_hmac(k, d), e);
+	        };
+	        /**
+	         * Perform a simple self-test to see if the VM is working
+	         * @return {String} Hexadecimal hash sample
+	         */
 
-	  var startEdge = null;
-	  for (var i = n.getEdges().iterator(); i.hasNext();) {
-	    var de = i.next();
-	    if (de.isVisited() || de.getSym().isVisited()) {
-	      startEdge = de;
-	      break
-	    }
-	  }
-	  if (startEdge === null) { throw new TopologyException('unable to find edge to compute depths at ' + n.getCoordinate()) }
-	  n.getEdges().computeDepths(startEdge);
-	  for (var i$1 = n.getEdges().iterator(); i$1.hasNext();) {
-	    var de$1 = i$1.next();
-	    de$1.setVisited(true);
-	    this$1.copySymDepths(de$1);
-	  }
-	};
-	BufferSubgraph.prototype.computeDepth = function computeDepth (outsideDepth) {
-	  this.clearVisitedEdges();
-	  var de = this._finder.getEdge();
-	  // const n = de.getNode()
-	  // const label = de.getLabel()
-	  de.setEdgeDepths(Position.RIGHT, outsideDepth);
-	  this.copySymDepths(de);
-	  this.computeDepths(de);
-	};
-	BufferSubgraph.prototype.create = function create (node) {
-	  this.addReachable(node);
-	  this._finder.findEdge(this._dirEdgeList);
-	  this._rightMostCoord = this._finder.getCoordinate();
-	};
-	BufferSubgraph.prototype.findResultEdges = function findResultEdges () {
-	  for (var it = this._dirEdgeList.iterator(); it.hasNext();) {
-	    var de = it.next();
-	    if (de.getDepth(Position.RIGHT) >= 1 && de.getDepth(Position.LEFT) <= 0 && !de.isInteriorAreaEdge()) {
-	      de.setInResult(true);
-	    }
-	  }
-	};
-	BufferSubgraph.prototype.computeDepths = function computeDepths (startEdge) {
-	    var this$1 = this;
-
-	  var nodesVisited = new HashSet();
-	  var nodeQueue = new LinkedList();
-	  var startNode = startEdge.getNode();
-	  nodeQueue.addLast(startNode);
-	  nodesVisited.add(startNode);
-	  startEdge.setVisited(true);
-	  while (!nodeQueue.isEmpty()) {
-	    var n = nodeQueue.removeFirst();
-	    nodesVisited.add(n);
-	    this$1.computeNodeDepth(n);
-	    for (var i = n.getEdges().iterator(); i.hasNext();) {
-	      var de = i.next();
-	      var sym = de.getSym();
-	      if (sym.isVisited()) { continue }
-	      var adjNode = sym.getNode();
-	      if (!nodesVisited.contains(adjNode)) {
-	        nodeQueue.addLast(adjNode);
-	        nodesVisited.add(adjNode);
-	      }
-	    }
-	  }
-	};
-	BufferSubgraph.prototype.compareTo = function compareTo (o) {
-	  var graph = o;
-	  if (this._rightMostCoord.x < graph._rightMostCoord.x) {
-	    return -1
-	  }
-	  if (this._rightMostCoord.x > graph._rightMostCoord.x) {
-	    return 1
-	  }
-	  return 0
-	};
-	BufferSubgraph.prototype.getEnvelope = function getEnvelope () {
-	  if (this._env === null) {
-	    var edgeEnv = new Envelope();
-	    for (var it = this._dirEdgeList.iterator(); it.hasNext();) {
-	      var dirEdge = it.next();
-	      var pts = dirEdge.getEdge().getCoordinates();
-	      for (var i = 0; i < pts.length - 1; i++) {
-	        edgeEnv.expandToInclude(pts[i]);
-	      }
-	    }
-	    this._env = edgeEnv;
-	  }
-	  return this._env
-	};
-	BufferSubgraph.prototype.addReachable = function addReachable (startNode) {
-	    var this$1 = this;
 
-	  var nodeStack = new Stack();
-	  nodeStack.add(startNode);
-	  while (!nodeStack.empty()) {
-	    var node = nodeStack.pop();
-	    this$1.add(node, nodeStack);
-	  }
-	};
-	BufferSubgraph.prototype.copySymDepths = function copySymDepths (de) {
-	  var sym = de.getSym();
-	  sym.setDepth(Position.LEFT, de.getDepth(Position.RIGHT));
-	  sym.setDepth(Position.RIGHT, de.getDepth(Position.LEFT));
-	};
-	BufferSubgraph.prototype.add = function add (node, nodeStack) {
-	    var this$1 = this;
-
-	  node.setVisited(true);
-	  this._nodes.add(node);
-	  for (var i = node.getEdges().iterator(); i.hasNext();) {
-	    var de = i.next();
-	    this$1._dirEdgeList.add(de);
-	    var sym = de.getSym();
-	    var symNode = sym.getNode();
-	    if (!symNode.isVisited()) { nodeStack.push(symNode); }
-	  }
-	};
-	BufferSubgraph.prototype.getNodes = function getNodes () {
-	  return this._nodes
-	};
-	BufferSubgraph.prototype.getDirectedEdges = function getDirectedEdges () {
-	  return this._dirEdgeList
-	};
-	BufferSubgraph.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable]
-	};
-	BufferSubgraph.prototype.getClass = function getClass () {
-	  return BufferSubgraph
-	};
+	        this.vm_test = function () {
+	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+	        };
+	        /**
+	         * Enable/disable uppercase hexadecimal returned string
+	         * @param {Boolean}
+	         * @return {Object} this
+	         */
 
-	var TopologyLocation = function TopologyLocation () {
-	  var this$1 = this;
 
-	  this.location = null;
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof Array) {
-	      var location = arguments[0];
-	      this.init(location.length);
-	    } else if (Number.isInteger(arguments[0])) {
-	      var on = arguments[0];
-	      this.init(1);
-	      this.location[Position.ON] = on;
-	    } else if (arguments[0] instanceof TopologyLocation) {
-	      var gl = arguments[0];
-	      this.init(gl.location.length);
-	      if (gl !== null) {
-	        for (var i = 0; i < this.location.length; i++) {
-	          this$1.location[i] = gl.location[i];
-	        }
-	      }
-	    }
-	  } else if (arguments.length === 3) {
-	    var on$1 = arguments[0];
-	    var left = arguments[1];
-	    var right = arguments[2];
-	    this.init(3);
-	    this.location[Position.ON] = on$1;
-	    this.location[Position.LEFT] = left;
-	    this.location[Position.RIGHT] = right;
-	  }
-	};
-	TopologyLocation.prototype.setAllLocations = function setAllLocations (locValue) {
-	    var this$1 = this;
+	        this.setUpperCase = function (a) {
+	          if (typeof a === 'boolean') {
+	            hexcase = a;
+	          }
 
-	  for (var i = 0; i < this.location.length; i++) {
-	    this$1.location[i] = locValue;
-	  }
-	};
-	TopologyLocation.prototype.isNull = function isNull () {
-	    var this$1 = this;
+	          return this;
+	        };
+	        /**
+	         * Defines a base64 pad string
+	         * @param {String} Pad
+	         * @return {Object} this
+	         */
 
-	  for (var i = 0; i < this.location.length; i++) {
-	    if (this$1.location[i] !== Location.NONE) { return false }
-	  }
-	  return true
-	};
-	TopologyLocation.prototype.setAllLocationsIfNull = function setAllLocationsIfNull (locValue) {
-	    var this$1 = this;
 
-	  for (var i = 0; i < this.location.length; i++) {
-	    if (this$1.location[i] === Location.NONE) { this$1.location[i] = locValue; }
-	  }
-	};
-	TopologyLocation.prototype.isLine = function isLine () {
-	  return this.location.length === 1
-	};
-	TopologyLocation.prototype.merge = function merge (gl) {
-	    var this$1 = this;
+	        this.setPad = function (a) {
+	          b64pad = a || b64pad;
+	          return this;
+	        };
+	        /**
+	         * Defines a base64 pad string
+	         * @param {Boolean}
+	         * @return {Object} [this]
+	         */
 
-	  if (gl.location.length > this.location.length) {
-	    var newLoc = new Array(3).fill(null);
-	    newLoc[Position.ON] = this.location[Position.ON];
-	    newLoc[Position.LEFT] = Location.NONE;
-	    newLoc[Position.RIGHT] = Location.NONE;
-	    this.location = newLoc;
-	  }
-	  for (var i = 0; i < this.location.length; i++) {
-	    if (this$1.location[i] === Location.NONE && i < gl.location.length) { this$1.location[i] = gl.location[i]; }
-	  }
-	};
-	TopologyLocation.prototype.getLocations = function getLocations () {
-	  return this.location
-	};
-	TopologyLocation.prototype.flip = function flip () {
-	  if (this.location.length <= 1) { return null }
-	  var temp = this.location[Position.LEFT];
-	  this.location[Position.LEFT] = this.location[Position.RIGHT];
-	  this.location[Position.RIGHT] = temp;
-	};
-	TopologyLocation.prototype.toString = function toString () {
-	  var buf = new StringBuffer();
-	  if (this.location.length > 1) { buf.append(Location.toLocationSymbol(this.location[Position.LEFT])); }
-	  buf.append(Location.toLocationSymbol(this.location[Position.ON]));
-	  if (this.location.length > 1) { buf.append(Location.toLocationSymbol(this.location[Position.RIGHT])); }
-	  return buf.toString()
-	};
-	TopologyLocation.prototype.setLocations = function setLocations (on, left, right) {
-	  this.location[Position.ON] = on;
-	  this.location[Position.LEFT] = left;
-	  this.location[Position.RIGHT] = right;
-	};
-	TopologyLocation.prototype.get = function get (posIndex) {
-	  if (posIndex < this.location.length) { return this.location[posIndex] }
-	  return Location.NONE
-	};
-	TopologyLocation.prototype.isArea = function isArea () {
-	  return this.location.length > 1
-	};
-	TopologyLocation.prototype.isAnyNull = function isAnyNull () {
-	    var this$1 = this;
 
-	  for (var i = 0; i < this.location.length; i++) {
-	    if (this$1.location[i] === Location.NONE) { return true }
-	  }
-	  return false
-	};
-	TopologyLocation.prototype.setLocation = function setLocation () {
-	  if (arguments.length === 1) {
-	    var locValue = arguments[0];
-	    this.setLocation(Position.ON, locValue);
-	  } else if (arguments.length === 2) {
-	    var locIndex = arguments[0];
-	    var locValue$1 = arguments[1];
-	    this.location[locIndex] = locValue$1;
-	  }
-	};
-	TopologyLocation.prototype.init = function init (size) {
-	  this.location = new Array(size).fill(null);
-	  this.setAllLocations(Location.NONE);
-	};
-	TopologyLocation.prototype.isEqualOnSide = function isEqualOnSide (le, locIndex) {
-	  return this.location[locIndex] === le.location[locIndex]
-	};
-	TopologyLocation.prototype.allPositionsEqual = function allPositionsEqual (loc) {
-	    var this$1 = this;
+	        this.setUTF8 = function (a) {
+	          if (typeof a === 'boolean') {
+	            utf8 = a;
+	          }
 
-	  for (var i = 0; i < this.location.length; i++) {
-	    if (this$1.location[i] !== loc) { return false }
-	  }
-	  return true
-	};
-	TopologyLocation.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	TopologyLocation.prototype.getClass = function getClass () {
-	  return TopologyLocation
-	};
+	          return this;
+	        }; // private methods
 
-	var Label = function Label () {
-	  this.elt = new Array(2).fill(null);
-	  if (arguments.length === 1) {
-	    if (Number.isInteger(arguments[0])) {
-	      var onLoc = arguments[0];
-	      this.elt[0] = new TopologyLocation(onLoc);
-	      this.elt[1] = new TopologyLocation(onLoc);
-	    } else if (arguments[0] instanceof Label) {
-	      var lbl = arguments[0];
-	      this.elt[0] = new TopologyLocation(lbl.elt[0]);
-	      this.elt[1] = new TopologyLocation(lbl.elt[1]);
-	    }
-	  } else if (arguments.length === 2) {
-	    var geomIndex = arguments[0];
-	    var onLoc$1 = arguments[1];
-	    this.elt[0] = new TopologyLocation(Location.NONE);
-	    this.elt[1] = new TopologyLocation(Location.NONE);
-	    this.elt[geomIndex].setLocation(onLoc$1);
-	  } else if (arguments.length === 3) {
-	    var onLoc$2 = arguments[0];
-	    var leftLoc = arguments[1];
-	    var rightLoc = arguments[2];
-	    this.elt[0] = new TopologyLocation(onLoc$2, leftLoc, rightLoc);
-	    this.elt[1] = new TopologyLocation(onLoc$2, leftLoc, rightLoc);
-	  } else if (arguments.length === 4) {
-	    var geomIndex$1 = arguments[0];
-	    var onLoc$3 = arguments[1];
-	    var leftLoc$1 = arguments[2];
-	    var rightLoc$1 = arguments[3];
-	    this.elt[0] = new TopologyLocation(Location.NONE, Location.NONE, Location.NONE);
-	    this.elt[1] = new TopologyLocation(Location.NONE, Location.NONE, Location.NONE);
-	    this.elt[geomIndex$1].setLocations(onLoc$3, leftLoc$1, rightLoc$1);
-	  }
-	};
-	Label.prototype.getGeometryCount = function getGeometryCount () {
-	  var count = 0;
-	  if (!this.elt[0].isNull()) { count++; }
-	  if (!this.elt[1].isNull()) { count++; }
-	  return count
-	};
-	Label.prototype.setAllLocations = function setAllLocations (geomIndex, location) {
-	  this.elt[geomIndex].setAllLocations(location);
-	};
-	Label.prototype.isNull = function isNull (geomIndex) {
-	  return this.elt[geomIndex].isNull()
-	};
-	Label.prototype.setAllLocationsIfNull = function setAllLocationsIfNull () {
-	  if (arguments.length === 1) {
-	    var location = arguments[0];
-	    this.setAllLocationsIfNull(0, location);
-	    this.setAllLocationsIfNull(1, location);
-	  } else if (arguments.length === 2) {
-	    var geomIndex = arguments[0];
-	    var location$1 = arguments[1];
-	    this.elt[geomIndex].setAllLocationsIfNull(location$1);
-	  }
-	};
-	Label.prototype.isLine = function isLine (geomIndex) {
-	  return this.elt[geomIndex].isLine()
-	};
-	Label.prototype.merge = function merge (lbl) {
-	    var this$1 = this;
+	        /**
+	         * Calculate the MD5 of a raw string
+	         */
 
-	  for (var i = 0; i < 2; i++) {
-	    if (this$1.elt[i] === null && lbl.elt[i] !== null) {
-	      this$1.elt[i] = new TopologyLocation(lbl.elt[i]);
-	    } else {
-	      this$1.elt[i].merge(lbl.elt[i]);
-	    }
-	  }
-	};
-	Label.prototype.flip = function flip () {
-	  this.elt[0].flip();
-	  this.elt[1].flip();
-	};
-	Label.prototype.getLocation = function getLocation () {
-	  if (arguments.length === 1) {
-	    var geomIndex = arguments[0];
-	    return this.elt[geomIndex].get(Position.ON)
-	  } else if (arguments.length === 2) {
-	    var geomIndex$1 = arguments[0];
-	    var posIndex = arguments[1];
-	    return this.elt[geomIndex$1].get(posIndex)
-	  }
-	};
-	Label.prototype.toString = function toString () {
-	  var buf = new StringBuffer();
-	  if (this.elt[0] !== null) {
-	    buf.append('A:');
-	    buf.append(this.elt[0].toString());
-	  }
-	  if (this.elt[1] !== null) {
-	    buf.append(' B:');
-	    buf.append(this.elt[1].toString());
-	  }
-	  return buf.toString()
-	};
-	Label.prototype.isArea = function isArea () {
-	  if (arguments.length === 0) {
-	    return this.elt[0].isArea() || this.elt[1].isArea()
-	  } else if (arguments.length === 1) {
-	    var geomIndex = arguments[0];
-	    return this.elt[geomIndex].isArea()
-	  }
-	};
-	Label.prototype.isAnyNull = function isAnyNull (geomIndex) {
-	  return this.elt[geomIndex].isAnyNull()
-	};
-	Label.prototype.setLocation = function setLocation () {
-	  if (arguments.length === 2) {
-	    var geomIndex = arguments[0];
-	    var location = arguments[1];
-	    this.elt[geomIndex].setLocation(Position.ON, location);
-	  } else if (arguments.length === 3) {
-	    var geomIndex$1 = arguments[0];
-	    var posIndex = arguments[1];
-	    var location$1 = arguments[2];
-	    this.elt[geomIndex$1].setLocation(posIndex, location$1);
-	  }
-	};
-	Label.prototype.isEqualOnSide = function isEqualOnSide (lbl, side) {
-	  return this.elt[0].isEqualOnSide(lbl.elt[0], side) && this.elt[1].isEqualOnSide(lbl.elt[1], side)
-	};
-	Label.prototype.allPositionsEqual = function allPositionsEqual (geomIndex, loc) {
-	  return this.elt[geomIndex].allPositionsEqual(loc)
-	};
-	Label.prototype.toLine = function toLine (geomIndex) {
-	  if (this.elt[geomIndex].isArea()) { this.elt[geomIndex] = new TopologyLocation(this.elt[geomIndex].location[0]); }
-	};
-	Label.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Label.prototype.getClass = function getClass () {
-	  return Label
-	};
-	Label.toLineLabel = function toLineLabel (label) {
-	  var lineLabel = new Label(Location.NONE);
-	  for (var i = 0; i < 2; i++) {
-	    lineLabel.setLocation(i, label.getLocation(i));
-	  }
-	  return lineLabel
-	};
 
-	var EdgeRing = function EdgeRing () {
-	  this._startDe = null;
-	  this._maxNodeDegree = -1;
-	  this._edges = new ArrayList();
-	  this._pts = new ArrayList();
-	  this._label = new Label(Location.NONE);
-	  this._ring = null;
-	  this._isHole = null;
-	  this._shell = null;
-	  this._holes = new ArrayList();
-	  this._geometryFactory = null;
-	  var start = arguments[0];
-	  var geometryFactory = arguments[1];
-	  this._geometryFactory = geometryFactory;
-	  this.computePoints(start);
-	  this.computeRing();
-	};
-	EdgeRing.prototype.computeRing = function computeRing () {
-	    var this$1 = this;
+	        function rstr(s) {
+	          s = utf8 ? utf8Encode(s) : s;
+	          return binl2rstr(binl(rstr2binl(s), s.length * 8));
+	        }
+	        /**
+	         * Calculate the HMAC-MD5, of a key and some data (raw strings)
+	         */
 
-	  if (this._ring !== null) { return null }
-	  var coord = new Array(this._pts.size()).fill(null);
-	  for (var i = 0; i < this._pts.size(); i++) {
-	    coord[i] = this$1._pts.get(i);
-	  }
-	  this._ring = this._geometryFactory.createLinearRing(coord);
-	  this._isHole = CGAlgorithms.isCCW(this._ring.getCoordinates());
-	};
-	EdgeRing.prototype.isIsolated = function isIsolated () {
-	  return this._label.getGeometryCount() === 1
-	};
-	EdgeRing.prototype.computePoints = function computePoints (start) {
-	    var this$1 = this;
 
-	  this._startDe = start;
-	  var de = start;
-	  var isFirstEdge = true;
-	  do {
-	    if (de === null) { throw new TopologyException('Found null DirectedEdge') }
-	    if (de.getEdgeRing() === this$1) { throw new TopologyException('Directed Edge visited twice during ring-building at ' + de.getCoordinate()) }
-	    this$1._edges.add(de);
-	    var label = de.getLabel();
-	    Assert.isTrue(label.isArea());
-	    this$1.mergeLabel(label);
-	    this$1.addPoints(de.getEdge(), de.isForward(), isFirstEdge);
-	    isFirstEdge = false;
-	    this$1.setEdgeRing(de, this$1);
-	    de = this$1.getNext(de);
-	  } while (de !== this._startDe)
-	};
-	EdgeRing.prototype.getLinearRing = function getLinearRing () {
-	  return this._ring
-	};
-	EdgeRing.prototype.getCoordinate = function getCoordinate (i) {
-	  return this._pts.get(i)
-	};
-	EdgeRing.prototype.computeMaxNodeDegree = function computeMaxNodeDegree () {
-	    var this$1 = this;
+	        function rstr_hmac(key, data) {
+	          var bkey, ipad, opad, hash, i;
+	          key = utf8 ? utf8Encode(key) : key;
+	          data = utf8 ? utf8Encode(data) : data;
+	          bkey = rstr2binl(key);
 
-	  this._maxNodeDegree = 0;
-	  var de = this._startDe;
-	  do {
-	    var node = de.getNode();
-	    var degree = node.getEdges().getOutgoingDegree(this$1);
-	    if (degree > this$1._maxNodeDegree) { this$1._maxNodeDegree = degree; }
-	    de = this$1.getNext(de);
-	  } while (de !== this._startDe)
-	  this._maxNodeDegree *= 2;
-	};
-	EdgeRing.prototype.addPoints = function addPoints (edge, isForward, isFirstEdge) {
-	    var this$1 = this;
+	          if (bkey.length > 16) {
+	            bkey = binl(bkey, key.length * 8);
+	          }
 
-	  var edgePts = edge.getCoordinates();
-	  if (isForward) {
-	    var startIndex = 1;
-	    if (isFirstEdge) { startIndex = 0; }
-	    for (var i = startIndex; i < edgePts.length; i++) {
-	      this$1._pts.add(edgePts[i]);
-	    }
-	  } else {
-	    var startIndex$1 = edgePts.length - 2;
-	    if (isFirstEdge) { startIndex$1 = edgePts.length - 1; }
-	    for (var i$1 = startIndex$1; i$1 >= 0; i$1--) {
-	      this$1._pts.add(edgePts[i$1]);
-	    }
-	  }
-	};
-	EdgeRing.prototype.isHole = function isHole () {
-	  return this._isHole
-	};
-	EdgeRing.prototype.setInResult = function setInResult () {
-	  var de = this._startDe;
-	  do {
-	    de.getEdge().setInResult(true);
-	    de = de.getNext();
-	  } while (de !== this._startDe)
-	};
-	EdgeRing.prototype.containsPoint = function containsPoint (p) {
-	  var shell = this.getLinearRing();
-	  var env = shell.getEnvelopeInternal();
-	  if (!env.contains(p)) { return false }
-	  if (!CGAlgorithms.isPointInRing(p, shell.getCoordinates())) { return false }
-	  for (var i = this._holes.iterator(); i.hasNext();) {
-	    var hole = i.next();
-	    if (hole.containsPoint(p)) { return false }
-	  }
-	  return true
-	};
-	EdgeRing.prototype.addHole = function addHole (ring) {
-	  this._holes.add(ring);
-	};
-	EdgeRing.prototype.isShell = function isShell () {
-	  return this._shell === null
-	};
-	EdgeRing.prototype.getLabel = function getLabel () {
-	  return this._label
-	};
-	EdgeRing.prototype.getEdges = function getEdges () {
-	  return this._edges
-	};
-	EdgeRing.prototype.getMaxNodeDegree = function getMaxNodeDegree () {
-	  if (this._maxNodeDegree < 0) { this.computeMaxNodeDegree(); }
-	  return this._maxNodeDegree
-	};
-	EdgeRing.prototype.getShell = function getShell () {
-	  return this._shell
-	};
-	EdgeRing.prototype.mergeLabel = function mergeLabel () {
-	  if (arguments.length === 1) {
-	    var deLabel = arguments[0];
-	    this.mergeLabel(deLabel, 0);
-	    this.mergeLabel(deLabel, 1);
-	  } else if (arguments.length === 2) {
-	    var deLabel$1 = arguments[0];
-	    var geomIndex = arguments[1];
-	    var loc = deLabel$1.getLocation(geomIndex, Position.RIGHT);
-	    if (loc === Location.NONE) { return null }
-	    if (this._label.getLocation(geomIndex) === Location.NONE) {
-	      this._label.setLocation(geomIndex, loc);
-	      return null
-	    }
-	  }
-	};
-	EdgeRing.prototype.setShell = function setShell (shell) {
-	  this._shell = shell;
-	  if (shell !== null) { shell.addHole(this); }
-	};
-	EdgeRing.prototype.toPolygon = function toPolygon (geometryFactory) {
-	    var this$1 = this;
+	          ipad = Array(16), opad = Array(16);
 
-	  var holeLR = new Array(this._holes.size()).fill(null);
-	  for (var i = 0; i < this._holes.size(); i++) {
-	    holeLR[i] = this$1._holes.get(i).getLinearRing();
-	  }
-	  var poly = geometryFactory.createPolygon(this.getLinearRing(), holeLR);
-	  return poly
-	};
-	EdgeRing.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	EdgeRing.prototype.getClass = function getClass () {
-	  return EdgeRing
-	};
+	          for (i = 0; i < 16; i += 1) {
+	            ipad[i] = bkey[i] ^ 0x36363636;
+	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	          }
 
-	var MinimalEdgeRing = (function (EdgeRing$$1) {
-	  function MinimalEdgeRing () {
-	    var start = arguments[0];
-	    var geometryFactory = arguments[1];
-	    EdgeRing$$1.call(this, start, geometryFactory);
-	  }
+	          hash = binl(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
+	          return binl2rstr(binl(opad.concat(hash), 512 + 128));
+	        }
+	        /**
+	         * Calculate the MD5 of an array of little-endian words, and a bit length.
+	         */
+
+
+	        function binl(x, len) {
+	          var i,
+	              olda,
+	              oldb,
+	              oldc,
+	              oldd,
+	              a = 1732584193,
+	              b = -271733879,
+	              c = -1732584194,
+	              d = 271733878;
+	          /* append padding */
+
+	          x[len >> 5] |= 0x80 << len % 32;
+	          x[(len + 64 >>> 9 << 4) + 14] = len;
+
+	          for (i = 0; i < x.length; i += 16) {
+	            olda = a;
+	            oldb = b;
+	            oldc = c;
+	            oldd = d;
+	            a = md5_ff(a, b, c, d, x[i + 0], 7, -680876936);
+	            d = md5_ff(d, a, b, c, x[i + 1], 12, -389564586);
+	            c = md5_ff(c, d, a, b, x[i + 2], 17, 606105819);
+	            b = md5_ff(b, c, d, a, x[i + 3], 22, -1044525330);
+	            a = md5_ff(a, b, c, d, x[i + 4], 7, -176418897);
+	            d = md5_ff(d, a, b, c, x[i + 5], 12, 1200080426);
+	            c = md5_ff(c, d, a, b, x[i + 6], 17, -1473231341);
+	            b = md5_ff(b, c, d, a, x[i + 7], 22, -45705983);
+	            a = md5_ff(a, b, c, d, x[i + 8], 7, 1770035416);
+	            d = md5_ff(d, a, b, c, x[i + 9], 12, -1958414417);
+	            c = md5_ff(c, d, a, b, x[i + 10], 17, -42063);
+	            b = md5_ff(b, c, d, a, x[i + 11], 22, -1990404162);
+	            a = md5_ff(a, b, c, d, x[i + 12], 7, 1804603682);
+	            d = md5_ff(d, a, b, c, x[i + 13], 12, -40341101);
+	            c = md5_ff(c, d, a, b, x[i + 14], 17, -1502002290);
+	            b = md5_ff(b, c, d, a, x[i + 15], 22, 1236535329);
+	            a = md5_gg(a, b, c, d, x[i + 1], 5, -165796510);
+	            d = md5_gg(d, a, b, c, x[i + 6], 9, -1069501632);
+	            c = md5_gg(c, d, a, b, x[i + 11], 14, 643717713);
+	            b = md5_gg(b, c, d, a, x[i + 0], 20, -373897302);
+	            a = md5_gg(a, b, c, d, x[i + 5], 5, -701558691);
+	            d = md5_gg(d, a, b, c, x[i + 10], 9, 38016083);
+	            c = md5_gg(c, d, a, b, x[i + 15], 14, -660478335);
+	            b = md5_gg(b, c, d, a, x[i + 4], 20, -405537848);
+	            a = md5_gg(a, b, c, d, x[i + 9], 5, 568446438);
+	            d = md5_gg(d, a, b, c, x[i + 14], 9, -1019803690);
+	            c = md5_gg(c, d, a, b, x[i + 3], 14, -187363961);
+	            b = md5_gg(b, c, d, a, x[i + 8], 20, 1163531501);
+	            a = md5_gg(a, b, c, d, x[i + 13], 5, -1444681467);
+	            d = md5_gg(d, a, b, c, x[i + 2], 9, -51403784);
+	            c = md5_gg(c, d, a, b, x[i + 7], 14, 1735328473);
+	            b = md5_gg(b, c, d, a, x[i + 12], 20, -1926607734);
+	            a = md5_hh(a, b, c, d, x[i + 5], 4, -378558);
+	            d = md5_hh(d, a, b, c, x[i + 8], 11, -2022574463);
+	            c = md5_hh(c, d, a, b, x[i + 11], 16, 1839030562);
+	            b = md5_hh(b, c, d, a, x[i + 14], 23, -35309556);
+	            a = md5_hh(a, b, c, d, x[i + 1], 4, -1530992060);
+	            d = md5_hh(d, a, b, c, x[i + 4], 11, 1272893353);
+	            c = md5_hh(c, d, a, b, x[i + 7], 16, -155497632);
+	            b = md5_hh(b, c, d, a, x[i + 10], 23, -1094730640);
+	            a = md5_hh(a, b, c, d, x[i + 13], 4, 681279174);
+	            d = md5_hh(d, a, b, c, x[i + 0], 11, -358537222);
+	            c = md5_hh(c, d, a, b, x[i + 3], 16, -722521979);
+	            b = md5_hh(b, c, d, a, x[i + 6], 23, 76029189);
+	            a = md5_hh(a, b, c, d, x[i + 9], 4, -640364487);
+	            d = md5_hh(d, a, b, c, x[i + 12], 11, -421815835);
+	            c = md5_hh(c, d, a, b, x[i + 15], 16, 530742520);
+	            b = md5_hh(b, c, d, a, x[i + 2], 23, -995338651);
+	            a = md5_ii(a, b, c, d, x[i + 0], 6, -198630844);
+	            d = md5_ii(d, a, b, c, x[i + 7], 10, 1126891415);
+	            c = md5_ii(c, d, a, b, x[i + 14], 15, -1416354905);
+	            b = md5_ii(b, c, d, a, x[i + 5], 21, -57434055);
+	            a = md5_ii(a, b, c, d, x[i + 12], 6, 1700485571);
+	            d = md5_ii(d, a, b, c, x[i + 3], 10, -1894986606);
+	            c = md5_ii(c, d, a, b, x[i + 10], 15, -1051523);
+	            b = md5_ii(b, c, d, a, x[i + 1], 21, -2054922799);
+	            a = md5_ii(a, b, c, d, x[i + 8], 6, 1873313359);
+	            d = md5_ii(d, a, b, c, x[i + 15], 10, -30611744);
+	            c = md5_ii(c, d, a, b, x[i + 6], 15, -1560198380);
+	            b = md5_ii(b, c, d, a, x[i + 13], 21, 1309151649);
+	            a = md5_ii(a, b, c, d, x[i + 4], 6, -145523070);
+	            d = md5_ii(d, a, b, c, x[i + 11], 10, -1120210379);
+	            c = md5_ii(c, d, a, b, x[i + 2], 15, 718787259);
+	            b = md5_ii(b, c, d, a, x[i + 9], 21, -343485551);
+	            a = safe_add(a, olda);
+	            b = safe_add(b, oldb);
+	            c = safe_add(c, oldc);
+	            d = safe_add(d, oldd);
+	          }
 
-	  if ( EdgeRing$$1 ) { MinimalEdgeRing.__proto__ = EdgeRing$$1; }
-	  MinimalEdgeRing.prototype = Object.create( EdgeRing$$1 && EdgeRing$$1.prototype );
-	  MinimalEdgeRing.prototype.constructor = MinimalEdgeRing;
-	  MinimalEdgeRing.prototype.setEdgeRing = function setEdgeRing (de, er) {
-	    de.setMinEdgeRing(er);
-	  };
-	  MinimalEdgeRing.prototype.getNext = function getNext (de) {
-	    return de.getNextMin()
-	  };
-	  MinimalEdgeRing.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  MinimalEdgeRing.prototype.getClass = function getClass () {
-	    return MinimalEdgeRing
-	  };
+	          return Array(a, b, c, d);
+	        }
+	        /**
+	         * These functions implement the four basic operations the algorithm uses.
+	         */
 
-	  return MinimalEdgeRing;
-	}(EdgeRing));
 
-	var MaximalEdgeRing = (function (EdgeRing$$1) {
-	  function MaximalEdgeRing () {
-	    var start = arguments[0];
-	    var geometryFactory = arguments[1];
-	    EdgeRing$$1.call(this, start, geometryFactory);
-	  }
+	        function md5_cmn(q, a, b, x, s, t) {
+	          return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);
+	        }
 
-	  if ( EdgeRing$$1 ) { MaximalEdgeRing.__proto__ = EdgeRing$$1; }
-	  MaximalEdgeRing.prototype = Object.create( EdgeRing$$1 && EdgeRing$$1.prototype );
-	  MaximalEdgeRing.prototype.constructor = MaximalEdgeRing;
-	  MaximalEdgeRing.prototype.buildMinimalRings = function buildMinimalRings () {
-	    var this$1 = this;
+	        function md5_ff(a, b, c, d, x, s, t) {
+	          return md5_cmn(b & c | ~b & d, a, b, x, s, t);
+	        }
 
-	    var minEdgeRings = new ArrayList();
-	    var de = this._startDe;
-	    do {
-	      if (de.getMinEdgeRing() === null) {
-	        var minEr = new MinimalEdgeRing(de, this$1._geometryFactory);
-	        minEdgeRings.add(minEr);
-	      }
-	      de = de.getNext();
-	    } while (de !== this._startDe)
-	    return minEdgeRings
-	  };
-	  MaximalEdgeRing.prototype.setEdgeRing = function setEdgeRing (de, er) {
-	    de.setEdgeRing(er);
-	  };
-	  MaximalEdgeRing.prototype.linkDirectedEdgesForMinimalEdgeRings = function linkDirectedEdgesForMinimalEdgeRings () {
-	    var this$1 = this;
+	        function md5_gg(a, b, c, d, x, s, t) {
+	          return md5_cmn(b & d | c & ~d, a, b, x, s, t);
+	        }
 
-	    var de = this._startDe;
-	    do {
-	      var node = de.getNode();
-	      node.getEdges().linkMinimalDirectedEdges(this$1);
-	      de = de.getNext();
-	    } while (de !== this._startDe)
-	  };
-	  MaximalEdgeRing.prototype.getNext = function getNext (de) {
-	    return de.getNext()
-	  };
-	  MaximalEdgeRing.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  MaximalEdgeRing.prototype.getClass = function getClass () {
-	    return MaximalEdgeRing
-	  };
+	        function md5_hh(a, b, c, d, x, s, t) {
+	          return md5_cmn(b ^ c ^ d, a, b, x, s, t);
+	        }
 
-	  return MaximalEdgeRing;
-	}(EdgeRing));
+	        function md5_ii(a, b, c, d, x, s, t) {
+	          return md5_cmn(c ^ (b | ~d), a, b, x, s, t);
+	        }
+	      },
 
-	var GraphComponent = function GraphComponent () {
-	  this._label = null;
-	  this._isInResult = false;
-	  this._isCovered = false;
-	  this._isCoveredSet = false;
-	  this._isVisited = false;
-	  if (arguments.length === 0) ; else if (arguments.length === 1) {
-	    var label = arguments[0];
-	    this._label = label;
-	  }
-	};
-	GraphComponent.prototype.setVisited = function setVisited (isVisited) {
-	  this._isVisited = isVisited;
-	};
-	GraphComponent.prototype.setInResult = function setInResult (isInResult) {
-	  this._isInResult = isInResult;
-	};
-	GraphComponent.prototype.isCovered = function isCovered () {
-	  return this._isCovered
-	};
-	GraphComponent.prototype.isCoveredSet = function isCoveredSet () {
-	  return this._isCoveredSet
-	};
-	GraphComponent.prototype.setLabel = function setLabel (label) {
-	  this._label = label;
-	};
-	GraphComponent.prototype.getLabel = function getLabel () {
-	  return this._label
-	};
-	GraphComponent.prototype.setCovered = function setCovered (isCovered) {
-	  this._isCovered = isCovered;
-	  this._isCoveredSet = true;
-	};
-	GraphComponent.prototype.updateIM = function updateIM (im) {
-	  Assert.isTrue(this._label.getGeometryCount() >= 2, 'found partial label');
-	  this.computeIM(im);
-	};
-	GraphComponent.prototype.isInResult = function isInResult () {
-	  return this._isInResult
-	};
-	GraphComponent.prototype.isVisited = function isVisited () {
-	  return this._isVisited
-	};
-	GraphComponent.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GraphComponent.prototype.getClass = function getClass () {
-	  return GraphComponent
-	};
+	      /**
+	       * @member Hashes
+	       * @class Hashes.SHA1
+	       * @param {Object} [config]
+	       * @constructor
+	       *
+	       * A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined in FIPS 180-1
+	       * Version 2.2 Copyright Paul Johnston 2000 - 2009.
+	       * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+	       * See http://pajhome.org.uk/crypt/md5 for details.
+	       */
+	      SHA1: function SHA1(options) {
+	        /**
+	         * Private config properties. You may need to tweak these to be compatible with
+	         * the server-side, but the defaults work in most cases.
+	         * See {@link Hashes.MD5#method-setUpperCase} and {@link Hashes.SHA1#method-setUpperCase}
+	         */
+	        var hexcase = options && typeof options.uppercase === 'boolean' ? options.uppercase : false,
+	            // hexadecimal output case format. false - lowercase; true - uppercase
+	        b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
+	            // base-64 pad character. Defaults to '=' for strict RFC compliance
+	        utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true; // enable/disable utf8 encoding
+	        // public methods
+
+	        this.hex = function (s) {
+	          return rstr2hex(rstr(s), hexcase);
+	        };
 
-	var Node$1 = (function (GraphComponent$$1) {
-	  function Node () {
-	    GraphComponent$$1.call(this);
-	    this._coord = null;
-	    this._edges = null;
-	    var coord = arguments[0];
-	    var edges = arguments[1];
-	    this._coord = coord;
-	    this._edges = edges;
-	    this._label = new Label(0, Location.NONE);
-	  }
-
-	  if ( GraphComponent$$1 ) { Node.__proto__ = GraphComponent$$1; }
-	  Node.prototype = Object.create( GraphComponent$$1 && GraphComponent$$1.prototype );
-	  Node.prototype.constructor = Node;
-	  Node.prototype.isIncidentEdgeInResult = function isIncidentEdgeInResult () {
-	    for (var it = this.getEdges().getEdges().iterator(); it.hasNext();) {
-	      var de = it.next();
-	      if (de.getEdge().isInResult()) { return true }
-	    }
-	    return false
-	  };
-	  Node.prototype.isIsolated = function isIsolated () {
-	    return this._label.getGeometryCount() === 1
-	  };
-	  Node.prototype.getCoordinate = function getCoordinate () {
-	    return this._coord
-	  };
-	  Node.prototype.print = function print (out) {
-	    out.println('node ' + this._coord + ' lbl: ' + this._label);
-	  };
-	  Node.prototype.computeIM = function computeIM (im) {};
-	  Node.prototype.computeMergedLocation = function computeMergedLocation (label2, eltIndex) {
-	    var loc = Location.NONE;
-	    loc = this._label.getLocation(eltIndex);
-	    if (!label2.isNull(eltIndex)) {
-	      var nLoc = label2.getLocation(eltIndex);
-	      if (loc !== Location.BOUNDARY) { loc = nLoc; }
-	    }
-	    return loc
-	  };
-	  Node.prototype.setLabel = function setLabel () {
-	    if (arguments.length === 2) {
-	      var argIndex = arguments[0];
-	      var onLocation = arguments[1];
-	      if (this._label === null) {
-	        this._label = new Label(argIndex, onLocation);
-	      } else { this._label.setLocation(argIndex, onLocation); }
-	    } else { return GraphComponent$$1.prototype.setLabel.apply(this, arguments) }
-	  };
-	  Node.prototype.getEdges = function getEdges () {
-	    return this._edges
-	  };
-	  Node.prototype.mergeLabel = function mergeLabel () {
-	    var this$1 = this;
-
-	    if (arguments[0] instanceof Node) {
-	      var n = arguments[0];
-	      this.mergeLabel(n._label);
-	    } else if (arguments[0] instanceof Label) {
-	      var label2 = arguments[0];
-	      for (var i = 0; i < 2; i++) {
-	        var loc = this$1.computeMergedLocation(label2, i);
-	        var thisLoc = this$1._label.getLocation(i);
-	        if (thisLoc === Location.NONE) { this$1._label.setLocation(i, loc); }
-	      }
-	    }
-	  };
-	  Node.prototype.add = function add (e) {
-	    this._edges.insert(e);
-	    e.setNode(this);
-	  };
-	  Node.prototype.setLabelBoundary = function setLabelBoundary (argIndex) {
-	    if (this._label === null) { return null }
-	    var loc = Location.NONE;
-	    if (this._label !== null) { loc = this._label.getLocation(argIndex); }
-	    var newLoc = null;
-	    switch (loc) {
-	      case Location.BOUNDARY:
-	        newLoc = Location.INTERIOR;
-	        break
-	      case Location.INTERIOR:
-	        newLoc = Location.BOUNDARY;
-	        break
-	      default:
-	        newLoc = Location.BOUNDARY;
-	        break
-	    }
-	    this._label.setLocation(argIndex, newLoc);
-	  };
-	  Node.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  Node.prototype.getClass = function getClass () {
-	    return Node
-	  };
+	        this.b64 = function (s) {
+	          return rstr2b64(rstr(s), b64pad);
+	        };
 
-	  return Node;
-	}(GraphComponent));
+	        this.any = function (s, e) {
+	          return rstr2any(rstr(s), e);
+	        };
 
-	var NodeMap = function NodeMap () {
-	  this.nodeMap = new TreeMap();
-	  this.nodeFact = null;
-	  var nodeFact = arguments[0];
-	  this.nodeFact = nodeFact;
-	};
-	NodeMap.prototype.find = function find (coord) {
-	  return this.nodeMap.get(coord)
-	};
-	NodeMap.prototype.addNode = function addNode () {
-	  if (arguments[0] instanceof Coordinate) {
-	    var coord = arguments[0];
-	    var node = this.nodeMap.get(coord);
-	    if (node === null) {
-	      node = this.nodeFact.createNode(coord);
-	      this.nodeMap.put(coord, node);
-	    }
-	    return node
-	  } else if (arguments[0] instanceof Node$1) {
-	    var n = arguments[0];
-	    var node$1 = this.nodeMap.get(n.getCoordinate());
-	    if (node$1 === null) {
-	      this.nodeMap.put(n.getCoordinate(), n);
-	      return n
-	    }
-	    node$1.mergeLabel(n);
-	    return node$1
-	  }
-	};
-	NodeMap.prototype.print = function print (out) {
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var n = it.next();
-	    n.print(out);
-	  }
-	};
-	NodeMap.prototype.iterator = function iterator () {
-	  return this.nodeMap.values().iterator()
-	};
-	NodeMap.prototype.values = function values () {
-	  return this.nodeMap.values()
-	};
-	NodeMap.prototype.getBoundaryNodes = function getBoundaryNodes (geomIndex) {
-	  var bdyNodes = new ArrayList();
-	  for (var i = this.iterator(); i.hasNext();) {
-	    var node = i.next();
-	    if (node.getLabel().getLocation(geomIndex) === Location.BOUNDARY) { bdyNodes.add(node); }
-	  }
-	  return bdyNodes
-	};
-	NodeMap.prototype.add = function add (e) {
-	  var p = e.getCoordinate();
-	  var n = this.addNode(p);
-	  n.add(e);
-	};
-	NodeMap.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	NodeMap.prototype.getClass = function getClass () {
-	  return NodeMap
-	};
+	        this.raw = function (s) {
+	          return rstr(s);
+	        };
 
-	var Quadrant = function Quadrant () {};
+	        this.hex_hmac = function (k, d) {
+	          return rstr2hex(rstr_hmac(k, d));
+	        };
 
-	var staticAccessors$21 = { NE: { configurable: true },NW: { configurable: true },SW: { configurable: true },SE: { configurable: true } };
+	        this.b64_hmac = function (k, d) {
+	          return rstr2b64(rstr_hmac(k, d), b64pad);
+	        };
 
-	Quadrant.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Quadrant.prototype.getClass = function getClass () {
-	  return Quadrant
-	};
-	Quadrant.isNorthern = function isNorthern (quad) {
-	  return quad === Quadrant.NE || quad === Quadrant.NW
-	};
-	Quadrant.isOpposite = function isOpposite (quad1, quad2) {
-	  if (quad1 === quad2) { return false }
-	  var diff = (quad1 - quad2 + 4) % 4;
-	  if (diff === 2) { return true }
-	  return false
-	};
-	Quadrant.commonHalfPlane = function commonHalfPlane (quad1, quad2) {
-	  if (quad1 === quad2) { return quad1 }
-	  var diff = (quad1 - quad2 + 4) % 4;
-	  if (diff === 2) { return -1 }
-	  var min = quad1 < quad2 ? quad1 : quad2;
-	  var max = quad1 > quad2 ? quad1 : quad2;
-	  if (min === 0 && max === 3) { return 3 }
-	  return min
-	};
-	Quadrant.isInHalfPlane = function isInHalfPlane (quad, halfPlane) {
-	  if (halfPlane === Quadrant.SE) {
-	    return quad === Quadrant.SE || quad === Quadrant.SW
-	  }
-	  return quad === halfPlane || quad === halfPlane + 1
-	};
-	Quadrant.quadrant = function quadrant () {
-	  if (typeof arguments[0] === 'number' && typeof arguments[1] === 'number') {
-	    var dx = arguments[0];
-	    var dy = arguments[1];
-	    if (dx === 0.0 && dy === 0.0) { throw new IllegalArgumentException('Cannot compute the quadrant for point ( ' + dx + ', ' + dy + ' )') }
-	    if (dx >= 0.0) {
-	      if (dy >= 0.0) { return Quadrant.NE; } else { return Quadrant.SE }
-	    } else {
-	      if (dy >= 0.0) { return Quadrant.NW; } else { return Quadrant.SW }
-	    }
-	  } else if (arguments[0] instanceof Coordinate && arguments[1] instanceof Coordinate) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    if (p1.x === p0.x && p1.y === p0.y) { throw new IllegalArgumentException('Cannot compute the quadrant for two identical points ' + p0) }
-	    if (p1.x >= p0.x) {
-	      if (p1.y >= p0.y) { return Quadrant.NE; } else { return Quadrant.SE }
-	    } else {
-	      if (p1.y >= p0.y) { return Quadrant.NW; } else { return Quadrant.SW }
-	    }
-	  }
-	};
-	staticAccessors$21.NE.get = function () { return 0 };
-	staticAccessors$21.NW.get = function () { return 1 };
-	staticAccessors$21.SW.get = function () { return 2 };
-	staticAccessors$21.SE.get = function () { return 3 };
-
-	Object.defineProperties( Quadrant, staticAccessors$21 );
-
-	var EdgeEnd = function EdgeEnd () {
-	  this._edge = null;
-	  this._label = null;
-	  this._node = null;
-	  this._p0 = null;
-	  this._p1 = null;
-	  this._dx = null;
-	  this._dy = null;
-	  this._quadrant = null;
-	  if (arguments.length === 1) {
-	    var edge = arguments[0];
-	    this._edge = edge;
-	  } else if (arguments.length === 3) {
-	    var edge$1 = arguments[0];
-	    var p0 = arguments[1];
-	    var p1 = arguments[2];
-	    var label = null;
-	    this._edge = edge$1;
-	    this.init(p0, p1);
-	    this._label = label;
-	  } else if (arguments.length === 4) {
-	    var edge$2 = arguments[0];
-	    var p0$1 = arguments[1];
-	    var p1$1 = arguments[2];
-	    var label$1 = arguments[3];
-	    this._edge = edge$2;
-	    this.init(p0$1, p1$1);
-	    this._label = label$1;
-	  }
-	};
-	EdgeEnd.prototype.compareDirection = function compareDirection (e) {
-	  if (this._dx === e._dx && this._dy === e._dy) { return 0 }
-	  if (this._quadrant > e._quadrant) { return 1 }
-	  if (this._quadrant < e._quadrant) { return -1 }
-	  return CGAlgorithms.computeOrientation(e._p0, e._p1, this._p1)
-	};
-	EdgeEnd.prototype.getDy = function getDy () {
-	  return this._dy
-	};
-	EdgeEnd.prototype.getCoordinate = function getCoordinate () {
-	  return this._p0
-	};
-	EdgeEnd.prototype.setNode = function setNode (node) {
-	  this._node = node;
-	};
-	EdgeEnd.prototype.print = function print (out) {
-	  var angle = Math.atan2(this._dy, this._dx);
-	  var className = this.getClass().getName();
-	  var lastDotPos = className.lastIndexOf('.');
-	  var name = className.substring(lastDotPos + 1);
-	  out.print('  ' + name + ': ' + this._p0 + ' - ' + this._p1 + ' ' + this._quadrant + ':' + angle + '   ' + this._label);
-	};
-	EdgeEnd.prototype.compareTo = function compareTo (obj) {
-	  var e = obj;
-	  return this.compareDirection(e)
-	};
-	EdgeEnd.prototype.getDirectedCoordinate = function getDirectedCoordinate () {
-	  return this._p1
-	};
-	EdgeEnd.prototype.getDx = function getDx () {
-	  return this._dx
-	};
-	EdgeEnd.prototype.getLabel = function getLabel () {
-	  return this._label
-	};
-	EdgeEnd.prototype.getEdge = function getEdge () {
-	  return this._edge
-	};
-	EdgeEnd.prototype.getQuadrant = function getQuadrant () {
-	  return this._quadrant
-	};
-	EdgeEnd.prototype.getNode = function getNode () {
-	  return this._node
-	};
-	EdgeEnd.prototype.toString = function toString () {
-	  var angle = Math.atan2(this._dy, this._dx);
-	  var className = this.getClass().getName();
-	  var lastDotPos = className.lastIndexOf('.');
-	  var name = className.substring(lastDotPos + 1);
-	  return '  ' + name + ': ' + this._p0 + ' - ' + this._p1 + ' ' + this._quadrant + ':' + angle + '   ' + this._label
-	};
-	EdgeEnd.prototype.computeLabel = function computeLabel (boundaryNodeRule) {};
-	EdgeEnd.prototype.init = function init (p0, p1) {
-	  this._p0 = p0;
-	  this._p1 = p1;
-	  this._dx = p1.x - p0.x;
-	  this._dy = p1.y - p0.y;
-	  this._quadrant = Quadrant.quadrant(this._dx, this._dy);
-	  Assert.isTrue(!(this._dx === 0 && this._dy === 0), 'EdgeEnd with identical endpoints found');
-	};
-	EdgeEnd.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable]
-	};
-	EdgeEnd.prototype.getClass = function getClass () {
-	  return EdgeEnd
-	};
+	        this.any_hmac = function (k, d, e) {
+	          return rstr2any(rstr_hmac(k, d), e);
+	        };
+	        /**
+	         * Perform a simple self-test to see if the VM is working
+	         * @return {String} Hexadecimal hash sample
+	         * @public
+	         */
 
-	var DirectedEdge = (function (EdgeEnd$$1) {
-	  function DirectedEdge () {
-	    var edge = arguments[0];
-	    var isForward = arguments[1];
-	    EdgeEnd$$1.call(this, edge);
-	    this._isForward = null;
-	    this._isInResult = false;
-	    this._isVisited = false;
-	    this._sym = null;
-	    this._next = null;
-	    this._nextMin = null;
-	    this._edgeRing = null;
-	    this._minEdgeRing = null;
-	    this._depth = [0, -999, -999];
-	    this._isForward = isForward;
-	    if (isForward) {
-	      this.init(edge.getCoordinate(0), edge.getCoordinate(1));
-	    } else {
-	      var n = edge.getNumPoints() - 1;
-	      this.init(edge.getCoordinate(n), edge.getCoordinate(n - 1));
-	    }
-	    this.computeDirectedLabel();
-	  }
 
-	  if ( EdgeEnd$$1 ) { DirectedEdge.__proto__ = EdgeEnd$$1; }
-	  DirectedEdge.prototype = Object.create( EdgeEnd$$1 && EdgeEnd$$1.prototype );
-	  DirectedEdge.prototype.constructor = DirectedEdge;
-	  DirectedEdge.prototype.getNextMin = function getNextMin () {
-	    return this._nextMin
-	  };
-	  DirectedEdge.prototype.getDepth = function getDepth (position) {
-	    return this._depth[position]
-	  };
-	  DirectedEdge.prototype.setVisited = function setVisited (isVisited) {
-	    this._isVisited = isVisited;
-	  };
-	  DirectedEdge.prototype.computeDirectedLabel = function computeDirectedLabel () {
-	    this._label = new Label(this._edge.getLabel());
-	    if (!this._isForward) { this._label.flip(); }
-	  };
-	  DirectedEdge.prototype.getNext = function getNext () {
-	    return this._next
-	  };
-	  DirectedEdge.prototype.setDepth = function setDepth (position, depthVal) {
-	    if (this._depth[position] !== -999) {
-	      if (this._depth[position] !== depthVal) { throw new TopologyException('assigned depths do not match', this.getCoordinate()) }
-	    }
-	    this._depth[position] = depthVal;
-	  };
-	  DirectedEdge.prototype.isInteriorAreaEdge = function isInteriorAreaEdge () {
-	    var this$1 = this;
+	        this.vm_test = function () {
+	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+	        };
+	        /**
+	         * @description Enable/disable uppercase hexadecimal returned string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	    var isInteriorAreaEdge = true;
-	    for (var i = 0; i < 2; i++) {
-	      if (!(this$1._label.isArea(i) && this$1._label.getLocation(i, Position.LEFT) === Location.INTERIOR && this$1._label.getLocation(i, Position.RIGHT) === Location.INTERIOR)) {
-	        isInteriorAreaEdge = false;
-	      }
-	    }
-	    return isInteriorAreaEdge
-	  };
-	  DirectedEdge.prototype.setNextMin = function setNextMin (nextMin) {
-	    this._nextMin = nextMin;
-	  };
-	  DirectedEdge.prototype.print = function print (out) {
-	    EdgeEnd$$1.prototype.print.call(this, out);
-	    out.print(' ' + this._depth[Position.LEFT] + '/' + this._depth[Position.RIGHT]);
-	    out.print(' (' + this.getDepthDelta() + ')');
-	    if (this._isInResult) { out.print(' inResult'); }
-	  };
-	  DirectedEdge.prototype.setMinEdgeRing = function setMinEdgeRing (minEdgeRing) {
-	    this._minEdgeRing = minEdgeRing;
-	  };
-	  DirectedEdge.prototype.isLineEdge = function isLineEdge () {
-	    var isLine = this._label.isLine(0) || this._label.isLine(1);
-	    var isExteriorIfArea0 = !this._label.isArea(0) || this._label.allPositionsEqual(0, Location.EXTERIOR);
-	    var isExteriorIfArea1 = !this._label.isArea(1) || this._label.allPositionsEqual(1, Location.EXTERIOR);
-	    return isLine && isExteriorIfArea0 && isExteriorIfArea1
-	  };
-	  DirectedEdge.prototype.setEdgeRing = function setEdgeRing (edgeRing) {
-	    this._edgeRing = edgeRing;
-	  };
-	  DirectedEdge.prototype.getMinEdgeRing = function getMinEdgeRing () {
-	    return this._minEdgeRing
-	  };
-	  DirectedEdge.prototype.getDepthDelta = function getDepthDelta () {
-	    var depthDelta = this._edge.getDepthDelta();
-	    if (!this._isForward) { depthDelta = -depthDelta; }
-	    return depthDelta
-	  };
-	  DirectedEdge.prototype.setInResult = function setInResult (isInResult) {
-	    this._isInResult = isInResult;
-	  };
-	  DirectedEdge.prototype.getSym = function getSym () {
-	    return this._sym
-	  };
-	  DirectedEdge.prototype.isForward = function isForward () {
-	    return this._isForward
-	  };
-	  DirectedEdge.prototype.getEdge = function getEdge () {
-	    return this._edge
-	  };
-	  DirectedEdge.prototype.printEdge = function printEdge (out) {
-	    this.print(out);
-	    out.print(' ');
-	    if (this._isForward) { this._edge.print(out); } else { this._edge.printReverse(out); }
-	  };
-	  DirectedEdge.prototype.setSym = function setSym (de) {
-	    this._sym = de;
-	  };
-	  DirectedEdge.prototype.setVisitedEdge = function setVisitedEdge (isVisited) {
-	    this.setVisited(isVisited);
-	    this._sym.setVisited(isVisited);
-	  };
-	  DirectedEdge.prototype.setEdgeDepths = function setEdgeDepths (position, depth) {
-	    var depthDelta = this.getEdge().getDepthDelta();
-	    if (!this._isForward) { depthDelta = -depthDelta; }
-	    var directionFactor = 1;
-	    if (position === Position.LEFT) { directionFactor = -1; }
-	    var oppositePos = Position.opposite(position);
-	    var delta = depthDelta * directionFactor;
-	    var oppositeDepth = depth + delta;
-	    this.setDepth(position, depth);
-	    this.setDepth(oppositePos, oppositeDepth);
-	  };
-	  DirectedEdge.prototype.getEdgeRing = function getEdgeRing () {
-	    return this._edgeRing
-	  };
-	  DirectedEdge.prototype.isInResult = function isInResult () {
-	    return this._isInResult
-	  };
-	  DirectedEdge.prototype.setNext = function setNext (next) {
-	    this._next = next;
-	  };
-	  DirectedEdge.prototype.isVisited = function isVisited () {
-	    return this._isVisited
-	  };
-	  DirectedEdge.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  DirectedEdge.prototype.getClass = function getClass () {
-	    return DirectedEdge
-	  };
-	  DirectedEdge.depthFactor = function depthFactor (currLocation, nextLocation) {
-	    if (currLocation === Location.EXTERIOR && nextLocation === Location.INTERIOR) { return 1; } else if (currLocation === Location.INTERIOR && nextLocation === Location.EXTERIOR) { return -1 }
-	    return 0
-	  };
 
-	  return DirectedEdge;
-	}(EdgeEnd));
+	        this.setUpperCase = function (a) {
+	          if (typeof a === 'boolean') {
+	            hexcase = a;
+	          }
+
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {string} Pad
+	         * @return {Object} this
+	         * @public
+	         */
 
-	var NodeFactory = function NodeFactory () {};
 
-	NodeFactory.prototype.createNode = function createNode (coord) {
-	  return new Node$1(coord, null)
-	};
-	NodeFactory.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	NodeFactory.prototype.getClass = function getClass () {
-	  return NodeFactory
-	};
+	        this.setPad = function (a) {
+	          b64pad = a || b64pad;
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	var PlanarGraph = function PlanarGraph () {
-	  this._edges = new ArrayList();
-	  this._nodes = null;
-	  this._edgeEndList = new ArrayList();
-	  if (arguments.length === 0) {
-	    this._nodes = new NodeMap(new NodeFactory());
-	  } else if (arguments.length === 1) {
-	    var nodeFact = arguments[0];
-	    this._nodes = new NodeMap(nodeFact);
-	  }
-	};
-	PlanarGraph.prototype.printEdges = function printEdges (out) {
-	    var this$1 = this;
 
-	  out.println('Edges:');
-	  for (var i = 0; i < this._edges.size(); i++) {
-	    out.println('edge ' + i + ':');
-	    var e = this$1._edges.get(i);
-	    e.print(out);
-	    e.eiList.print(out);
-	  }
-	};
-	PlanarGraph.prototype.find = function find (coord) {
-	  return this._nodes.find(coord)
-	};
-	PlanarGraph.prototype.addNode = function addNode () {
-	  if (arguments[0] instanceof Node$1) {
-	    var node = arguments[0];
-	    return this._nodes.addNode(node)
-	  } else if (arguments[0] instanceof Coordinate) {
-	    var coord = arguments[0];
-	    return this._nodes.addNode(coord)
-	  }
-	};
-	PlanarGraph.prototype.getNodeIterator = function getNodeIterator () {
-	  return this._nodes.iterator()
-	};
-	PlanarGraph.prototype.linkResultDirectedEdges = function linkResultDirectedEdges () {
-	  for (var nodeit = this._nodes.iterator(); nodeit.hasNext();) {
-	    var node = nodeit.next();
-	    node.getEdges().linkResultDirectedEdges();
-	  }
-	};
-	PlanarGraph.prototype.debugPrintln = function debugPrintln (o) {
-	  System.out.println(o);
-	};
-	PlanarGraph.prototype.isBoundaryNode = function isBoundaryNode (geomIndex, coord) {
-	  var node = this._nodes.find(coord);
-	  if (node === null) { return false }
-	  var label = node.getLabel();
-	  if (label !== null && label.getLocation(geomIndex) === Location.BOUNDARY) { return true }
-	  return false
-	};
-	PlanarGraph.prototype.linkAllDirectedEdges = function linkAllDirectedEdges () {
-	  for (var nodeit = this._nodes.iterator(); nodeit.hasNext();) {
-	    var node = nodeit.next();
-	    node.getEdges().linkAllDirectedEdges();
-	  }
-	};
-	PlanarGraph.prototype.matchInSameDirection = function matchInSameDirection (p0, p1, ep0, ep1) {
-	  if (!p0.equals(ep0)) { return false }
-	  if (CGAlgorithms.computeOrientation(p0, p1, ep1) === CGAlgorithms.COLLINEAR && Quadrant.quadrant(p0, p1) === Quadrant.quadrant(ep0, ep1)) { return true }
-	  return false
-	};
-	PlanarGraph.prototype.getEdgeEnds = function getEdgeEnds () {
-	  return this._edgeEndList
-	};
-	PlanarGraph.prototype.debugPrint = function debugPrint (o) {
-	  System.out.print(o);
-	};
-	PlanarGraph.prototype.getEdgeIterator = function getEdgeIterator () {
-	  return this._edges.iterator()
-	};
-	PlanarGraph.prototype.findEdgeInSameDirection = function findEdgeInSameDirection (p0, p1) {
-	    var this$1 = this;
+	        this.setUTF8 = function (a) {
+	          if (typeof a === 'boolean') {
+	            utf8 = a;
+	          }
 
-	  for (var i = 0; i < this._edges.size(); i++) {
-	    var e = this$1._edges.get(i);
-	    var eCoord = e.getCoordinates();
-	    if (this$1.matchInSameDirection(p0, p1, eCoord[0], eCoord[1])) { return e }
-	    if (this$1.matchInSameDirection(p0, p1, eCoord[eCoord.length - 1], eCoord[eCoord.length - 2])) { return e }
-	  }
-	  return null
-	};
-	PlanarGraph.prototype.insertEdge = function insertEdge (e) {
-	  this._edges.add(e);
-	};
-	PlanarGraph.prototype.findEdgeEnd = function findEdgeEnd (e) {
-	  for (var i = this.getEdgeEnds().iterator(); i.hasNext();) {
-	    var ee = i.next();
-	    if (ee.getEdge() === e) { return ee }
-	  }
-	  return null
-	};
-	PlanarGraph.prototype.addEdges = function addEdges (edgesToAdd) {
-	    var this$1 = this;
-
-	  for (var it = edgesToAdd.iterator(); it.hasNext();) {
-	    var e = it.next();
-	    this$1._edges.add(e);
-	    var de1 = new DirectedEdge(e, true);
-	    var de2 = new DirectedEdge(e, false);
-	    de1.setSym(de2);
-	    de2.setSym(de1);
-	    this$1.add(de1);
-	    this$1.add(de2);
-	  }
-	};
-	PlanarGraph.prototype.add = function add (e) {
-	  this._nodes.add(e);
-	  this._edgeEndList.add(e);
-	};
-	PlanarGraph.prototype.getNodes = function getNodes () {
-	  return this._nodes.values()
-	};
-	PlanarGraph.prototype.findEdge = function findEdge (p0, p1) {
-	    var this$1 = this;
+	          return this;
+	        }; // private methods
 
-	  for (var i = 0; i < this._edges.size(); i++) {
-	    var e = this$1._edges.get(i);
-	    var eCoord = e.getCoordinates();
-	    if (p0.equals(eCoord[0]) && p1.equals(eCoord[1])) { return e }
-	  }
-	  return null
-	};
-	PlanarGraph.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	PlanarGraph.prototype.getClass = function getClass () {
-	  return PlanarGraph
-	};
-	PlanarGraph.linkResultDirectedEdges = function linkResultDirectedEdges (nodes) {
-	  for (var nodeit = nodes.iterator(); nodeit.hasNext();) {
-	    var node = nodeit.next();
-	    node.getEdges().linkResultDirectedEdges();
-	  }
-	};
+	        /**
+	         * Calculate the SHA-512 of a raw string
+	         */
 
-	var PolygonBuilder = function PolygonBuilder () {
-	  this._geometryFactory = null;
-	  this._shellList = new ArrayList();
-	  var geometryFactory = arguments[0];
-	  this._geometryFactory = geometryFactory;
-	};
-	PolygonBuilder.prototype.sortShellsAndHoles = function sortShellsAndHoles (edgeRings, shellList, freeHoleList) {
-	  for (var it = edgeRings.iterator(); it.hasNext();) {
-	    var er = it.next();
-	    if (er.isHole()) {
-	      freeHoleList.add(er);
-	    } else {
-	      shellList.add(er);
-	    }
-	  }
-	};
-	PolygonBuilder.prototype.computePolygons = function computePolygons (shellList) {
-	    var this$1 = this;
 
-	  var resultPolyList = new ArrayList();
-	  for (var it = shellList.iterator(); it.hasNext();) {
-	    var er = it.next();
-	    var poly = er.toPolygon(this$1._geometryFactory);
-	    resultPolyList.add(poly);
-	  }
-	  return resultPolyList
-	};
-	PolygonBuilder.prototype.placeFreeHoles = function placeFreeHoles (shellList, freeHoleList) {
-	    var this$1 = this;
+	        function rstr(s) {
+	          s = utf8 ? utf8Encode(s) : s;
+	          return binb2rstr(binb(rstr2binb(s), s.length * 8));
+	        }
+	        /**
+	         * Calculate the HMAC-SHA1 of a key and some data (raw strings)
+	         */
 
-	  for (var it = freeHoleList.iterator(); it.hasNext();) {
-	    var hole = it.next();
-	    if (hole.getShell() === null) {
-	      var shell = this$1.findEdgeRingContaining(hole, shellList);
-	      if (shell === null) { throw new TopologyException('unable to assign hole to a shell', hole.getCoordinate(0)) }
-	      hole.setShell(shell);
-	    }
-	  }
-	};
-	PolygonBuilder.prototype.buildMinimalEdgeRings = function buildMinimalEdgeRings (maxEdgeRings, shellList, freeHoleList) {
-	    var this$1 = this;
-
-	  var edgeRings = new ArrayList();
-	  for (var it = maxEdgeRings.iterator(); it.hasNext();) {
-	    var er = it.next();
-	    if (er.getMaxNodeDegree() > 2) {
-	      er.linkDirectedEdgesForMinimalEdgeRings();
-	      var minEdgeRings = er.buildMinimalRings();
-	      var shell = this$1.findShell(minEdgeRings);
-	      if (shell !== null) {
-	        this$1.placePolygonHoles(shell, minEdgeRings);
-	        shellList.add(shell);
-	      } else {
-	        freeHoleList.addAll(minEdgeRings);
-	      }
-	    } else {
-	      edgeRings.add(er);
-	    }
-	  }
-	  return edgeRings
-	};
-	PolygonBuilder.prototype.containsPoint = function containsPoint (p) {
-	  for (var it = this._shellList.iterator(); it.hasNext();) {
-	    var er = it.next();
-	    if (er.containsPoint(p)) { return true }
-	  }
-	  return false
-	};
-	PolygonBuilder.prototype.buildMaximalEdgeRings = function buildMaximalEdgeRings (dirEdges) {
-	    var this$1 = this;
 
-	  var maxEdgeRings = new ArrayList();
-	  for (var it = dirEdges.iterator(); it.hasNext();) {
-	    var de = it.next();
-	    if (de.isInResult() && de.getLabel().isArea()) {
-	      if (de.getEdgeRing() === null) {
-	        var er = new MaximalEdgeRing(de, this$1._geometryFactory);
-	        maxEdgeRings.add(er);
-	        er.setInResult();
-	      }
-	    }
-	  }
-	  return maxEdgeRings
-	};
-	PolygonBuilder.prototype.placePolygonHoles = function placePolygonHoles (shell, minEdgeRings) {
-	  for (var it = minEdgeRings.iterator(); it.hasNext();) {
-	    var er = it.next();
-	    if (er.isHole()) {
-	      er.setShell(shell);
-	    }
-	  }
-	};
-	PolygonBuilder.prototype.getPolygons = function getPolygons () {
-	  var resultPolyList = this.computePolygons(this._shellList);
-	  return resultPolyList
-	};
-	PolygonBuilder.prototype.findEdgeRingContaining = function findEdgeRingContaining (testEr, shellList) {
-	  var testRing = testEr.getLinearRing();
-	  var testEnv = testRing.getEnvelopeInternal();
-	  var testPt = testRing.getCoordinateN(0);
-	  var minShell = null;
-	  var minEnv = null;
-	  for (var it = shellList.iterator(); it.hasNext();) {
-	    var tryShell = it.next();
-	    var tryRing = tryShell.getLinearRing();
-	    var tryEnv = tryRing.getEnvelopeInternal();
-	    if (minShell !== null) { minEnv = minShell.getLinearRing().getEnvelopeInternal(); }
-	    var isContained = false;
-	    if (tryEnv.contains(testEnv) && CGAlgorithms.isPointInRing(testPt, tryRing.getCoordinates())) { isContained = true; }
-	    if (isContained) {
-	      if (minShell === null || minEnv.contains(tryEnv)) {
-	        minShell = tryShell;
-	      }
-	    }
-	  }
-	  return minShell
-	};
-	PolygonBuilder.prototype.findShell = function findShell (minEdgeRings) {
-	  var shellCount = 0;
-	  var shell = null;
-	  for (var it = minEdgeRings.iterator(); it.hasNext();) {
-	    var er = it.next();
-	    if (!er.isHole()) {
-	      shell = er;
-	      shellCount++;
-	    }
-	  }
-	  Assert.isTrue(shellCount <= 1, 'found two shells in MinimalEdgeRing list');
-	  return shell
-	};
-	PolygonBuilder.prototype.add = function add () {
-	  if (arguments.length === 1) {
-	    var graph = arguments[0];
-	    this.add(graph.getEdgeEnds(), graph.getNodes());
-	  } else if (arguments.length === 2) {
-	    var dirEdges = arguments[0];
-	    var nodes = arguments[1];
-	    PlanarGraph.linkResultDirectedEdges(nodes);
-	    var maxEdgeRings = this.buildMaximalEdgeRings(dirEdges);
-	    var freeHoleList = new ArrayList();
-	    var edgeRings = this.buildMinimalEdgeRings(maxEdgeRings, this._shellList, freeHoleList);
-	    this.sortShellsAndHoles(edgeRings, this._shellList, freeHoleList);
-	    this.placeFreeHoles(this._shellList, freeHoleList);
-	  }
-	};
-	PolygonBuilder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	PolygonBuilder.prototype.getClass = function getClass () {
-	  return PolygonBuilder
-	};
+	        function rstr_hmac(key, data) {
+	          var bkey, ipad, opad, i, hash;
+	          key = utf8 ? utf8Encode(key) : key;
+	          data = utf8 ? utf8Encode(data) : data;
+	          bkey = rstr2binb(key);
 
-	var Boundable = function Boundable () {};
+	          if (bkey.length > 16) {
+	            bkey = binb(bkey, key.length * 8);
+	          }
 
-	Boundable.prototype.getBounds = function getBounds () {};
-	Boundable.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Boundable.prototype.getClass = function getClass () {
-	  return Boundable
-	};
+	          ipad = Array(16), opad = Array(16);
 
-	var ItemBoundable = function ItemBoundable () {
-	  this._bounds = null;
-	  this._item = null;
-	  var bounds = arguments[0];
-	  var item = arguments[1];
-	  this._bounds = bounds;
-	  this._item = item;
-	};
-	ItemBoundable.prototype.getItem = function getItem () {
-	  return this._item
-	};
-	ItemBoundable.prototype.getBounds = function getBounds () {
-	  return this._bounds
-	};
-	ItemBoundable.prototype.interfaces_ = function interfaces_ () {
-	  return [Boundable, Serializable]
-	};
-	ItemBoundable.prototype.getClass = function getClass () {
-	  return ItemBoundable
-	};
+	          for (i = 0; i < 16; i += 1) {
+	            ipad[i] = bkey[i] ^ 0x36363636;
+	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	          }
 
-	var PriorityQueue = function PriorityQueue () {
-	  this._size = null;
-	  this._items = null;
-	  this._size = 0;
-	  this._items = new ArrayList();
-	  this._items.add(null);
-	};
-	PriorityQueue.prototype.poll = function poll () {
-	  if (this.isEmpty()) { return null }
-	  var minItem = this._items.get(1);
-	  this._items.set(1, this._items.get(this._size));
-	  this._size -= 1;
-	  this.reorder(1);
-	  return minItem
-	};
-	PriorityQueue.prototype.size = function size () {
-	  return this._size
-	};
-	PriorityQueue.prototype.reorder = function reorder (hole) {
-	    var this$1 = this;
+	          hash = binb(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
+	          return binb2rstr(binb(opad.concat(hash), 512 + 160));
+	        }
+	        /**
+	         * Calculate the SHA-1 of an array of big-endian words, and a bit length
+	         */
+
+
+	        function binb(x, len) {
+	          var i,
+	              j,
+	              t,
+	              olda,
+	              oldb,
+	              oldc,
+	              oldd,
+	              olde,
+	              w = Array(80),
+	              a = 1732584193,
+	              b = -271733879,
+	              c = -1732584194,
+	              d = 271733878,
+	              e = -1009589776;
+	          /* append padding */
+
+	          x[len >> 5] |= 0x80 << 24 - len % 32;
+	          x[(len + 64 >> 9 << 4) + 15] = len;
+
+	          for (i = 0; i < x.length; i += 16) {
+	            olda = a;
+	            oldb = b;
+	            oldc = c;
+	            oldd = d;
+	            olde = e;
+
+	            for (j = 0; j < 80; j += 1) {
+	              if (j < 16) {
+	                w[j] = x[i + j];
+	              } else {
+	                w[j] = bit_rol(w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16], 1);
+	              }
 
-	  var child = null;
-	  var tmp = this._items.get(hole);
-	  for (; hole * 2 <= this._size; hole = child) {
-	    child = hole * 2;
-	    if (child !== this$1._size && this$1._items.get(child + 1).compareTo(this$1._items.get(child)) < 0) { child++; }
-	    if (this$1._items.get(child).compareTo(tmp) < 0) { this$1._items.set(hole, this$1._items.get(child)); } else { break }
-	  }
-	  this._items.set(hole, tmp);
-	};
-	PriorityQueue.prototype.clear = function clear () {
-	  this._size = 0;
-	  this._items.clear();
-	};
-	PriorityQueue.prototype.isEmpty = function isEmpty () {
-	  return this._size === 0
-	};
-	PriorityQueue.prototype.add = function add (x) {
-	    var this$1 = this;
+	              t = safe_add(safe_add(bit_rol(a, 5), sha1_ft(j, b, c, d)), safe_add(safe_add(e, w[j]), sha1_kt(j)));
+	              e = d;
+	              d = c;
+	              c = bit_rol(b, 30);
+	              b = a;
+	              a = t;
+	            }
 
-	  this._items.add(null);
-	  this._size += 1;
-	  var hole = this._size;
-	  this._items.set(0, x);
-	  for (; x.compareTo(this._items.get(Math.trunc(hole / 2))) < 0; hole /= 2) {
-	    this$1._items.set(hole, this$1._items.get(Math.trunc(hole / 2)));
-	  }
-	  this._items.set(hole, x);
-	};
-	PriorityQueue.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	PriorityQueue.prototype.getClass = function getClass () {
-	  return PriorityQueue
-	};
+	            a = safe_add(a, olda);
+	            b = safe_add(b, oldb);
+	            c = safe_add(c, oldc);
+	            d = safe_add(d, oldd);
+	            e = safe_add(e, olde);
+	          }
 
-	var ItemVisitor = function ItemVisitor () {};
+	          return Array(a, b, c, d, e);
+	        }
+	        /**
+	         * Perform the appropriate triplet combination function for the current
+	         * iteration
+	         */
 
-	ItemVisitor.prototype.visitItem = function visitItem (item) {};
-	ItemVisitor.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	ItemVisitor.prototype.getClass = function getClass () {
-	  return ItemVisitor
-	};
 
-	var SpatialIndex = function SpatialIndex () {};
+	        function sha1_ft(t, b, c, d) {
+	          if (t < 20) {
+	            return b & c | ~b & d;
+	          }
 
-	SpatialIndex.prototype.insert = function insert (itemEnv, item) {};
-	SpatialIndex.prototype.remove = function remove (itemEnv, item) {};
-	SpatialIndex.prototype.query = function query () {
-	  // if (arguments.length === 1) {
-	  // const searchEnv = arguments[0]
-	  // } else if (arguments.length === 2) {
-	  // const searchEnv = arguments[0]
-	  // const visitor = arguments[1]
-	  // }
-	};
-	SpatialIndex.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SpatialIndex.prototype.getClass = function getClass () {
-	  return SpatialIndex
-	};
+	          if (t < 40) {
+	            return b ^ c ^ d;
+	          }
 
-	var AbstractNode = function AbstractNode () {
-	  this._childBoundables = new ArrayList();
-	  this._bounds = null;
-	  this._level = null;
-	  if (arguments.length === 0) ; else if (arguments.length === 1) {
-	    var level = arguments[0];
-	    this._level = level;
-	  }
-	};
+	          if (t < 60) {
+	            return b & c | b & d | c & d;
+	          }
 
-	var staticAccessors$22 = { serialVersionUID: { configurable: true } };
-	AbstractNode.prototype.getLevel = function getLevel () {
-	  return this._level
-	};
-	AbstractNode.prototype.size = function size () {
-	  return this._childBoundables.size()
-	};
-	AbstractNode.prototype.getChildBoundables = function getChildBoundables () {
-	  return this._childBoundables
-	};
-	AbstractNode.prototype.addChildBoundable = function addChildBoundable (childBoundable) {
-	  Assert.isTrue(this._bounds === null);
-	  this._childBoundables.add(childBoundable);
-	};
-	AbstractNode.prototype.isEmpty = function isEmpty () {
-	  return this._childBoundables.isEmpty()
-	};
-	AbstractNode.prototype.getBounds = function getBounds () {
-	  if (this._bounds === null) {
-	    this._bounds = this.computeBounds();
-	  }
-	  return this._bounds
-	};
-	AbstractNode.prototype.interfaces_ = function interfaces_ () {
-	  return [Boundable, Serializable]
-	};
-	AbstractNode.prototype.getClass = function getClass () {
-	  return AbstractNode
-	};
-	staticAccessors$22.serialVersionUID.get = function () { return 6493722185909573708 };
+	          return b ^ c ^ d;
+	        }
+	        /**
+	         * Determine the appropriate additive constant for the current iteration
+	         */
 
-	Object.defineProperties( AbstractNode, staticAccessors$22 );
 
-	var Collections = function Collections () {};
+	        function sha1_kt(t) {
+	          return t < 20 ? 1518500249 : t < 40 ? 1859775393 : t < 60 ? -1894007588 : -899497514;
+	        }
+	      },
 
-	Collections.reverseOrder = function reverseOrder () {
-	  return {
-	    compare: function compare (a, b) {
-	      return b.compareTo(a)
-	    }
-	  }
-	};
-	Collections.min = function min (l) {
-	  Collections.sort(l);
-	  return l.get(0)
-	};
-	Collections.sort = function sort (l, c) {
-	  var a = l.toArray();
-	  if (c) {
-	    Arrays.sort(a, c);
-	  } else {
-	    Arrays.sort(a);
-	  }
-	  var i = l.iterator();
-	  for (var pos = 0, alen = a.length; pos < alen; pos++) {
-	    i.next();
-	    i.set(a[pos]);
-	  }
-	};
-	Collections.singletonList = function singletonList (o) {
-	  var arrayList = new ArrayList();
-	  arrayList.add(o);
-	  return arrayList
-	};
+	      /**
+	       * @class Hashes.SHA256
+	       * @param {config}
+	       *
+	       * A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined in FIPS 180-2
+	       * Version 2.2 Copyright Angel Marin, Paul Johnston 2000 - 2009.
+	       * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+	       * See http://pajhome.org.uk/crypt/md5 for details.
+	       * Also http://anmar.eu.org/projects/jssha2/
+	       */
+	      SHA256: function SHA256(options) {
+	        /**
+	         * Private properties configuration variables. You may need to tweak these to be compatible with
+	         * the server-side, but the defaults work in most cases.
+	         * @see this.setUpperCase() method
+	         * @see this.setPad() method
+	         */
+	        options && typeof options.uppercase === 'boolean' ? options.uppercase : false;
+	            var // hexadecimal output case format. false - lowercase; true - uppercase  */
+	        b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
 
-	var BoundablePair = function BoundablePair () {
-	  this._boundable1 = null;
-	  this._boundable2 = null;
-	  this._distance = null;
-	  this._itemDistance = null;
-	  var boundable1 = arguments[0];
-	  var boundable2 = arguments[1];
-	  var itemDistance = arguments[2];
-	  this._boundable1 = boundable1;
-	  this._boundable2 = boundable2;
-	  this._itemDistance = itemDistance;
-	  this._distance = this.distance();
-	};
-	BoundablePair.prototype.expandToQueue = function expandToQueue (priQ, minDistance) {
-	  var isComp1 = BoundablePair.isComposite(this._boundable1);
-	  var isComp2 = BoundablePair.isComposite(this._boundable2);
-	  if (isComp1 && isComp2) {
-	    if (BoundablePair.area(this._boundable1) > BoundablePair.area(this._boundable2)) {
-	      this.expand(this._boundable1, this._boundable2, priQ, minDistance);
-	      return null
-	    } else {
-	      this.expand(this._boundable2, this._boundable1, priQ, minDistance);
-	      return null
-	    }
-	  } else if (isComp1) {
-	    this.expand(this._boundable1, this._boundable2, priQ, minDistance);
-	    return null
-	  } else if (isComp2) {
-	    this.expand(this._boundable2, this._boundable1, priQ, minDistance);
-	    return null
-	  }
-	  throw new IllegalArgumentException('neither boundable is composite')
-	};
-	BoundablePair.prototype.isLeaves = function isLeaves () {
-	  return !(BoundablePair.isComposite(this._boundable1) || BoundablePair.isComposite(this._boundable2))
-	};
-	BoundablePair.prototype.compareTo = function compareTo (o) {
-	  var nd = o;
-	  if (this._distance < nd._distance) { return -1 }
-	  if (this._distance > nd._distance) { return 1 }
-	  return 0
-	};
-	BoundablePair.prototype.expand = function expand (bndComposite, bndOther, priQ, minDistance) {
-	    var this$1 = this;
+	        /* base-64 pad character. Default '=' for strict RFC compliance   */
+	        utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
 
-	  var children = bndComposite.getChildBoundables();
-	  for (var i = children.iterator(); i.hasNext();) {
-	    var child = i.next();
-	    var bp = new BoundablePair(child, bndOther, this$1._itemDistance);
-	    if (bp.getDistance() < minDistance) {
-	      priQ.add(bp);
-	    }
-	  }
-	};
-	BoundablePair.prototype.getBoundable = function getBoundable (i) {
-	  if (i === 0) { return this._boundable1 }
-	  return this._boundable2
-	};
-	BoundablePair.prototype.getDistance = function getDistance () {
-	  return this._distance
-	};
-	BoundablePair.prototype.distance = function distance () {
-	  if (this.isLeaves()) {
-	    return this._itemDistance.distance(this._boundable1, this._boundable2)
-	  }
-	  return this._boundable1.getBounds().distance(this._boundable2.getBounds())
-	};
-	BoundablePair.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable]
-	};
-	BoundablePair.prototype.getClass = function getClass () {
-	  return BoundablePair
-	};
-	BoundablePair.area = function area (b) {
-	  return b.getBounds().getArea()
-	};
-	BoundablePair.isComposite = function isComposite (item) {
-	  return item instanceof AbstractNode
-	};
+	        /* enable/disable utf8 encoding */
+	        sha256_K;
+	        /* privileged (public) methods */
 
-	var AbstractSTRtree = function AbstractSTRtree () {
-	  this._root = null;
-	  this._built = false;
-	  this._itemBoundables = new ArrayList();
-	  this._nodeCapacity = null;
-	  if (arguments.length === 0) {
-	    var nodeCapacity = AbstractSTRtree.DEFAULT_NODE_CAPACITY;
-	    this._nodeCapacity = nodeCapacity;
-	  } else if (arguments.length === 1) {
-	    var nodeCapacity$1 = arguments[0];
-	    Assert.isTrue(nodeCapacity$1 > 1, 'Node capacity must be greater than 1');
-	    this._nodeCapacity = nodeCapacity$1;
-	  }
-	};
+	        this.hex = function (s) {
+	          return rstr2hex(rstr(s, utf8));
+	        };
 
-	var staticAccessors$23 = { IntersectsOp: { configurable: true },serialVersionUID: { configurable: true },DEFAULT_NODE_CAPACITY: { configurable: true } };
-	AbstractSTRtree.prototype.getNodeCapacity = function getNodeCapacity () {
-	  return this._nodeCapacity
-	};
-	AbstractSTRtree.prototype.lastNode = function lastNode (nodes) {
-	  return nodes.get(nodes.size() - 1)
-	};
-	AbstractSTRtree.prototype.size = function size () {
-	    var this$1 = this;
+	        this.b64 = function (s) {
+	          return rstr2b64(rstr(s, utf8), b64pad);
+	        };
 
-	  if (arguments.length === 0) {
-	    if (this.isEmpty()) {
-	      return 0
-	    }
-	    this.build();
-	    return this.size(this._root)
-	  } else if (arguments.length === 1) {
-	    var node = arguments[0];
-	    var size = 0;
-	    for (var i = node.getChildBoundables().iterator(); i.hasNext();) {
-	      var childBoundable = i.next();
-	      if (childBoundable instanceof AbstractNode) {
-	        size += this$1.size(childBoundable);
-	      } else if (childBoundable instanceof ItemBoundable) {
-	        size += 1;
-	      }
-	    }
-	    return size
-	  }
-	};
-	AbstractSTRtree.prototype.removeItem = function removeItem (node, item) {
-	  var childToRemove = null;
-	  for (var i = node.getChildBoundables().iterator(); i.hasNext();) {
-	    var childBoundable = i.next();
-	    if (childBoundable instanceof ItemBoundable) {
-	      if (childBoundable.getItem() === item) { childToRemove = childBoundable; }
-	    }
-	  }
-	  if (childToRemove !== null) {
-	    node.getChildBoundables().remove(childToRemove);
-	    return true
-	  }
-	  return false
-	};
-	AbstractSTRtree.prototype.itemsTree = function itemsTree () {
-	    var this$1 = this;
-
-	  if (arguments.length === 0) {
-	    this.build();
-	    var valuesTree = this.itemsTree(this._root);
-	    if (valuesTree === null) { return new ArrayList() }
-	    return valuesTree
-	  } else if (arguments.length === 1) {
-	    var node = arguments[0];
-	    var valuesTreeForNode = new ArrayList();
-	    for (var i = node.getChildBoundables().iterator(); i.hasNext();) {
-	      var childBoundable = i.next();
-	      if (childBoundable instanceof AbstractNode) {
-	        var valuesTreeForChild = this$1.itemsTree(childBoundable);
-	        if (valuesTreeForChild !== null) { valuesTreeForNode.add(valuesTreeForChild); }
-	      } else if (childBoundable instanceof ItemBoundable) {
-	        valuesTreeForNode.add(childBoundable.getItem());
-	      } else {
-	        Assert.shouldNeverReachHere();
-	      }
-	    }
-	    if (valuesTreeForNode.size() <= 0) { return null }
-	    return valuesTreeForNode
-	  }
-	};
-	AbstractSTRtree.prototype.insert = function insert (bounds, item) {
-	  Assert.isTrue(!this._built, 'Cannot insert items into an STR packed R-tree after it has been built.');
-	  this._itemBoundables.add(new ItemBoundable(bounds, item));
-	};
-	AbstractSTRtree.prototype.boundablesAtLevel = function boundablesAtLevel () {
-	    var this$1 = this;
+	        this.any = function (s, e) {
+	          return rstr2any(rstr(s, utf8), e);
+	        };
 
-	  if (arguments.length === 1) {
-	    var level = arguments[0];
-	    var boundables = new ArrayList();
-	    this.boundablesAtLevel(level, this._root, boundables);
-	    return boundables
-	  } else if (arguments.length === 3) {
-	    var level$1 = arguments[0];
-	    var top = arguments[1];
-	    var boundables$1 = arguments[2];
-	    Assert.isTrue(level$1 > -2);
-	    if (top.getLevel() === level$1) {
-	      boundables$1.add(top);
-	      return null
-	    }
-	    for (var i = top.getChildBoundables().iterator(); i.hasNext();) {
-	      var boundable = i.next();
-	      if (boundable instanceof AbstractNode) {
-	        this$1.boundablesAtLevel(level$1, boundable, boundables$1);
-	      } else {
-	        Assert.isTrue(boundable instanceof ItemBoundable);
-	        if (level$1 === -1) {
-	          boundables$1.add(boundable);
-	        }
-	      }
-	    }
-	    return null
-	  }
-	};
-	AbstractSTRtree.prototype.query = function query () {
-	    var this$1 = this;
+	        this.raw = function (s) {
+	          return rstr(s, utf8);
+	        };
 
-	  if (arguments.length === 1) {
-	    var searchBounds = arguments[0];
-	    this.build();
-	    var matches = new ArrayList();
-	    if (this.isEmpty()) {
-	      return matches
-	    }
-	    if (this.getIntersectsOp().intersects(this._root.getBounds(), searchBounds)) {
-	      this.query(searchBounds, this._root, matches);
-	    }
-	    return matches
-	  } else if (arguments.length === 2) {
-	    var searchBounds$1 = arguments[0];
-	    var visitor = arguments[1];
-	    this.build();
-	    if (this.isEmpty()) {
-	      return null
-	    }
-	    if (this.getIntersectsOp().intersects(this._root.getBounds(), searchBounds$1)) {
-	      this.query(searchBounds$1, this._root, visitor);
-	    }
-	  } else if (arguments.length === 3) {
-	    if (hasInterface(arguments[2], ItemVisitor) && (arguments[0] instanceof Object && arguments[1] instanceof AbstractNode)) {
-	      var searchBounds$2 = arguments[0];
-	      var node = arguments[1];
-	      var visitor$1 = arguments[2];
-	      var childBoundables = node.getChildBoundables();
-	      for (var i = 0; i < childBoundables.size(); i++) {
-	        var childBoundable = childBoundables.get(i);
-	        if (!this$1.getIntersectsOp().intersects(childBoundable.getBounds(), searchBounds$2)) {
-	          continue
-	        }
-	        if (childBoundable instanceof AbstractNode) {
-	          this$1.query(searchBounds$2, childBoundable, visitor$1);
-	        } else if (childBoundable instanceof ItemBoundable) {
-	          visitor$1.visitItem(childBoundable.getItem());
-	        } else {
-	          Assert.shouldNeverReachHere();
-	        }
-	      }
-	    } else if (hasInterface(arguments[2], List) && (arguments[0] instanceof Object && arguments[1] instanceof AbstractNode)) {
-	      var searchBounds$3 = arguments[0];
-	      var node$1 = arguments[1];
-	      var matches$1 = arguments[2];
-	      var childBoundables$1 = node$1.getChildBoundables();
-	      for (var i$1 = 0; i$1 < childBoundables$1.size(); i$1++) {
-	        var childBoundable$1 = childBoundables$1.get(i$1);
-	        if (!this$1.getIntersectsOp().intersects(childBoundable$1.getBounds(), searchBounds$3)) {
-	          continue
-	        }
-	        if (childBoundable$1 instanceof AbstractNode) {
-	          this$1.query(searchBounds$3, childBoundable$1, matches$1);
-	        } else if (childBoundable$1 instanceof ItemBoundable) {
-	          matches$1.add(childBoundable$1.getItem());
-	        } else {
-	          Assert.shouldNeverReachHere();
-	        }
-	      }
-	    }
-	  }
-	};
-	AbstractSTRtree.prototype.build = function build () {
-	  if (this._built) { return null }
-	  this._root = this._itemBoundables.isEmpty() ? this.createNode(0) : this.createHigherLevels(this._itemBoundables, -1);
-	  this._itemBoundables = null;
-	  this._built = true;
-	};
-	AbstractSTRtree.prototype.getRoot = function getRoot () {
-	  this.build();
-	  return this._root
-	};
-	AbstractSTRtree.prototype.remove = function remove () {
-	    var this$1 = this;
+	        this.hex_hmac = function (k, d) {
+	          return rstr2hex(rstr_hmac(k, d));
+	        };
 
-	  if (arguments.length === 2) {
-	    var searchBounds = arguments[0];
-	    var item = arguments[1];
-	    this.build();
-	    if (this.getIntersectsOp().intersects(this._root.getBounds(), searchBounds)) {
-	      return this.remove(searchBounds, this._root, item)
-	    }
-	    return false
-	  } else if (arguments.length === 3) {
-	    var searchBounds$1 = arguments[0];
-	    var node = arguments[1];
-	    var item$1 = arguments[2];
-	    var found = this.removeItem(node, item$1);
-	    if (found) { return true }
-	    var childToPrune = null;
-	    for (var i = node.getChildBoundables().iterator(); i.hasNext();) {
-	      var childBoundable = i.next();
-	      if (!this$1.getIntersectsOp().intersects(childBoundable.getBounds(), searchBounds$1)) {
-	        continue
-	      }
-	      if (childBoundable instanceof AbstractNode) {
-	        found = this$1.remove(searchBounds$1, childBoundable, item$1);
-	        if (found) {
-	          childToPrune = childBoundable;
-	          break
-	        }
-	      }
-	    }
-	    if (childToPrune !== null) {
-	      if (childToPrune.getChildBoundables().isEmpty()) {
-	        node.getChildBoundables().remove(childToPrune);
-	      }
-	    }
-	    return found
-	  }
-	};
-	AbstractSTRtree.prototype.createHigherLevels = function createHigherLevels (boundablesOfALevel, level) {
-	  Assert.isTrue(!boundablesOfALevel.isEmpty());
-	  var parentBoundables = this.createParentBoundables(boundablesOfALevel, level + 1);
-	  if (parentBoundables.size() === 1) {
-	    return parentBoundables.get(0)
-	  }
-	  return this.createHigherLevels(parentBoundables, level + 1)
-	};
-	AbstractSTRtree.prototype.depth = function depth () {
-	    var this$1 = this;
+	        this.b64_hmac = function (k, d) {
+	          return rstr2b64(rstr_hmac(k, d), b64pad);
+	        };
 
-	  if (arguments.length === 0) {
-	    if (this.isEmpty()) {
-	      return 0
-	    }
-	    this.build();
-	    return this.depth(this._root)
-	  } else if (arguments.length === 1) {
-	    var node = arguments[0];
-	    var maxChildDepth = 0;
-	    for (var i = node.getChildBoundables().iterator(); i.hasNext();) {
-	      var childBoundable = i.next();
-	      if (childBoundable instanceof AbstractNode) {
-	        var childDepth = this$1.depth(childBoundable);
-	        if (childDepth > maxChildDepth) { maxChildDepth = childDepth; }
-	      }
-	    }
-	    return maxChildDepth + 1
-	  }
-	};
-	AbstractSTRtree.prototype.createParentBoundables = function createParentBoundables (childBoundables, newLevel) {
-	    var this$1 = this;
-
-	  Assert.isTrue(!childBoundables.isEmpty());
-	  var parentBoundables = new ArrayList();
-	  parentBoundables.add(this.createNode(newLevel));
-	  var sortedChildBoundables = new ArrayList(childBoundables);
-	  Collections.sort(sortedChildBoundables, this.getComparator());
-	  for (var i = sortedChildBoundables.iterator(); i.hasNext();) {
-	    var childBoundable = i.next();
-	    if (this$1.lastNode(parentBoundables).getChildBoundables().size() === this$1.getNodeCapacity()) {
-	      parentBoundables.add(this$1.createNode(newLevel));
-	    }
-	    this$1.lastNode(parentBoundables).addChildBoundable(childBoundable);
-	  }
-	  return parentBoundables
-	};
-	AbstractSTRtree.prototype.isEmpty = function isEmpty () {
-	  if (!this._built) { return this._itemBoundables.isEmpty() }
-	  return this._root.isEmpty()
-	};
-	AbstractSTRtree.prototype.interfaces_ = function interfaces_ () {
-	  return [Serializable]
-	};
-	AbstractSTRtree.prototype.getClass = function getClass () {
-	  return AbstractSTRtree
-	};
-	AbstractSTRtree.compareDoubles = function compareDoubles (a, b) {
-	  return a > b ? 1 : a < b ? -1 : 0
-	};
-	staticAccessors$23.IntersectsOp.get = function () { return IntersectsOp };
-	staticAccessors$23.serialVersionUID.get = function () { return -3886435814360241337 };
-	staticAccessors$23.DEFAULT_NODE_CAPACITY.get = function () { return 10 };
+	        this.any_hmac = function (k, d, e) {
+	          return rstr2any(rstr_hmac(k, d), e);
+	        };
+	        /**
+	         * Perform a simple self-test to see if the VM is working
+	         * @return {String} Hexadecimal hash sample
+	         * @public
+	         */
 
-	Object.defineProperties( AbstractSTRtree, staticAccessors$23 );
 
-	var IntersectsOp = function IntersectsOp () {};
+	        this.vm_test = function () {
+	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+	        };
+	        /**
+	         * Enable/disable uppercase hexadecimal returned string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	var ItemDistance = function ItemDistance () {};
 
-	ItemDistance.prototype.distance = function distance (item1, item2) {};
-	ItemDistance.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	ItemDistance.prototype.getClass = function getClass () {
-	  return ItemDistance
-	};
+	        this.setUpperCase = function (a) {
 
-	var STRtree = (function (AbstractSTRtree$$1) {
-	  function STRtree (nodeCapacity) {
-	    nodeCapacity = nodeCapacity || STRtree.DEFAULT_NODE_CAPACITY;
-	    AbstractSTRtree$$1.call(this, nodeCapacity);
-	  }
-
-	  if ( AbstractSTRtree$$1 ) { STRtree.__proto__ = AbstractSTRtree$$1; }
-	  STRtree.prototype = Object.create( AbstractSTRtree$$1 && AbstractSTRtree$$1.prototype );
-	  STRtree.prototype.constructor = STRtree;
-
-	  var staticAccessors = { STRtreeNode: { configurable: true },serialVersionUID: { configurable: true },xComparator: { configurable: true },yComparator: { configurable: true },intersectsOp: { configurable: true },DEFAULT_NODE_CAPACITY: { configurable: true } };
-	  STRtree.prototype.createParentBoundablesFromVerticalSlices = function createParentBoundablesFromVerticalSlices (verticalSlices, newLevel) {
-	    var this$1 = this;
-
-	    Assert.isTrue(verticalSlices.length > 0);
-	    var parentBoundables = new ArrayList();
-	    for (var i = 0; i < verticalSlices.length; i++) {
-	      parentBoundables.addAll(this$1.createParentBoundablesFromVerticalSlice(verticalSlices[i], newLevel));
-	    }
-	    return parentBoundables
-	  };
-	  STRtree.prototype.createNode = function createNode (level) {
-	    return new STRtreeNode(level)
-	  };
-	  STRtree.prototype.size = function size () {
-	    if (arguments.length === 0) {
-	      return AbstractSTRtree$$1.prototype.size.call(this)
-	    } else { return AbstractSTRtree$$1.prototype.size.apply(this, arguments) }
-	  };
-	  STRtree.prototype.insert = function insert () {
-	    if (arguments.length === 2) {
-	      var itemEnv = arguments[0];
-	      var item = arguments[1];
-	      if (itemEnv.isNull()) {
-	        return null
-	      }
-	      AbstractSTRtree$$1.prototype.insert.call(this, itemEnv, item);
-	    } else { return AbstractSTRtree$$1.prototype.insert.apply(this, arguments) }
-	  };
-	  STRtree.prototype.getIntersectsOp = function getIntersectsOp () {
-	    return STRtree.intersectsOp
-	  };
-	  STRtree.prototype.verticalSlices = function verticalSlices (childBoundables, sliceCount) {
-	    var sliceCapacity = Math.trunc(Math.ceil(childBoundables.size() / sliceCount));
-	    var slices = new Array(sliceCount).fill(null);
-	    var i = childBoundables.iterator();
-	    for (var j = 0; j < sliceCount; j++) {
-	      slices[j] = new ArrayList();
-	      var boundablesAddedToSlice = 0;
-	      while (i.hasNext() && boundablesAddedToSlice < sliceCapacity) {
-	        var childBoundable = i.next();
-	        slices[j].add(childBoundable);
-	        boundablesAddedToSlice++;
-	      }
-	    }
-	    return slices
-	  };
-	  STRtree.prototype.query = function query () {
-	    if (arguments.length === 1) {
-	      var searchEnv = arguments[0];
-	      return AbstractSTRtree$$1.prototype.query.call(this, searchEnv)
-	    } else if (arguments.length === 2) {
-	      var searchEnv$1 = arguments[0];
-	      var visitor = arguments[1];
-	      AbstractSTRtree$$1.prototype.query.call(this, searchEnv$1, visitor);
-	    } else if (arguments.length === 3) {
-	      if (hasInterface(arguments[2], ItemVisitor) && (arguments[0] instanceof Object && arguments[1] instanceof AbstractNode)) {
-	        var searchBounds = arguments[0];
-	        var node = arguments[1];
-	        var visitor$1 = arguments[2];
-	        AbstractSTRtree$$1.prototype.query.call(this, searchBounds, node, visitor$1);
-	      } else if (hasInterface(arguments[2], List) && (arguments[0] instanceof Object && arguments[1] instanceof AbstractNode)) {
-	        var searchBounds$1 = arguments[0];
-	        var node$1 = arguments[1];
-	        var matches = arguments[2];
-	        AbstractSTRtree$$1.prototype.query.call(this, searchBounds$1, node$1, matches);
-	      }
-	    }
-	  };
-	  STRtree.prototype.getComparator = function getComparator () {
-	    return STRtree.yComparator
-	  };
-	  STRtree.prototype.createParentBoundablesFromVerticalSlice = function createParentBoundablesFromVerticalSlice (childBoundables, newLevel) {
-	    return AbstractSTRtree$$1.prototype.createParentBoundables.call(this, childBoundables, newLevel)
-	  };
-	  STRtree.prototype.remove = function remove () {
-	    if (arguments.length === 2) {
-	      var itemEnv = arguments[0];
-	      var item = arguments[1];
-	      return AbstractSTRtree$$1.prototype.remove.call(this, itemEnv, item)
-	    } else { return AbstractSTRtree$$1.prototype.remove.apply(this, arguments) }
-	  };
-	  STRtree.prototype.depth = function depth () {
-	    if (arguments.length === 0) {
-	      return AbstractSTRtree$$1.prototype.depth.call(this)
-	    } else { return AbstractSTRtree$$1.prototype.depth.apply(this, arguments) }
-	  };
-	  STRtree.prototype.createParentBoundables = function createParentBoundables (childBoundables, newLevel) {
-	    Assert.isTrue(!childBoundables.isEmpty());
-	    var minLeafCount = Math.trunc(Math.ceil(childBoundables.size() / this.getNodeCapacity()));
-	    var sortedChildBoundables = new ArrayList(childBoundables);
-	    Collections.sort(sortedChildBoundables, STRtree.xComparator);
-	    var verticalSlices = this.verticalSlices(sortedChildBoundables, Math.trunc(Math.ceil(Math.sqrt(minLeafCount))));
-	    return this.createParentBoundablesFromVerticalSlices(verticalSlices, newLevel)
-	  };
-	  STRtree.prototype.nearestNeighbour = function nearestNeighbour () {
-	    if (arguments.length === 1) {
-	      if (hasInterface(arguments[0], ItemDistance)) {
-	        var itemDist = arguments[0];
-	        var bp = new BoundablePair(this.getRoot(), this.getRoot(), itemDist);
-	        return this.nearestNeighbour(bp)
-	      } else if (arguments[0] instanceof BoundablePair) {
-	        var initBndPair = arguments[0];
-	        return this.nearestNeighbour(initBndPair, Double.POSITIVE_INFINITY)
-	      }
-	    } else if (arguments.length === 2) {
-	      if (arguments[0] instanceof STRtree && hasInterface(arguments[1], ItemDistance)) {
-	        var tree = arguments[0];
-	        var itemDist$1 = arguments[1];
-	        var bp$1 = new BoundablePair(this.getRoot(), tree.getRoot(), itemDist$1);
-	        return this.nearestNeighbour(bp$1)
-	      } else if (arguments[0] instanceof BoundablePair && typeof arguments[1] === 'number') {
-	        var initBndPair$1 = arguments[0];
-	        var maxDistance = arguments[1];
-	        var distanceLowerBound = maxDistance;
-	        var minPair = null;
-	        var priQ = new PriorityQueue();
-	        priQ.add(initBndPair$1);
-	        while (!priQ.isEmpty() && distanceLowerBound > 0.0) {
-	          var bndPair = priQ.poll();
-	          var currentDistance = bndPair.getDistance();
-	          if (currentDistance >= distanceLowerBound) { break }
-	          if (bndPair.isLeaves()) {
-	            distanceLowerBound = currentDistance;
-	            minPair = bndPair;
-	          } else {
-	            bndPair.expandToQueue(priQ, distanceLowerBound);
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {string} Pad
+	         * @return {Object} this
+	         * @public
+	         */
+
+
+	        this.setPad = function (a) {
+	          b64pad = a || b64pad;
+	          return this;
+	        };
+	        /**
+	         * Defines a base64 pad string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
+
+
+	        this.setUTF8 = function (a) {
+	          if (typeof a === 'boolean') {
+	            utf8 = a;
 	          }
-	        }
-	        return [minPair.getBoundable(0).getItem(), minPair.getBoundable(1).getItem()]
-	      }
-	    } else if (arguments.length === 3) {
-	      var env = arguments[0];
-	      var item = arguments[1];
-	      var itemDist$2 = arguments[2];
-	      var bnd = new ItemBoundable(env, item);
-	      var bp$2 = new BoundablePair(this.getRoot(), bnd, itemDist$2);
-	      return this.nearestNeighbour(bp$2)[0]
-	    }
-	  };
-	  STRtree.prototype.interfaces_ = function interfaces_ () {
-	    return [SpatialIndex, Serializable]
-	  };
-	  STRtree.prototype.getClass = function getClass () {
-	    return STRtree
-	  };
-	  STRtree.centreX = function centreX (e) {
-	    return STRtree.avg(e.getMinX(), e.getMaxX())
-	  };
-	  STRtree.avg = function avg (a, b) {
-	    return (a + b) / 2
-	  };
-	  STRtree.centreY = function centreY (e) {
-	    return STRtree.avg(e.getMinY(), e.getMaxY())
-	  };
-	  staticAccessors.STRtreeNode.get = function () { return STRtreeNode };
-	  staticAccessors.serialVersionUID.get = function () { return 259274702368956900 };
-	  staticAccessors.xComparator.get = function () {
-	    return {
-	      interfaces_: function () {
-	        return [Comparator]
-	      },
-	      compare: function (o1, o2) {
-	        return AbstractSTRtree$$1.compareDoubles(STRtree.centreX(o1.getBounds()), STRtree.centreX(o2.getBounds()))
-	      }
-	    }
-	  };
-	  staticAccessors.yComparator.get = function () {
-	    return {
-	      interfaces_: function () {
-	        return [Comparator]
-	      },
-	      compare: function (o1, o2) {
-	        return AbstractSTRtree$$1.compareDoubles(STRtree.centreY(o1.getBounds()), STRtree.centreY(o2.getBounds()))
-	      }
-	    }
-	  };
-	  staticAccessors.intersectsOp.get = function () {
-	    return {
-	      interfaces_: function () {
-	        return [AbstractSTRtree$$1.IntersectsOp]
-	      },
-	      intersects: function (aBounds, bBounds) {
-	        return aBounds.intersects(bBounds)
-	      }
-	    }
-	  };
-	  staticAccessors.DEFAULT_NODE_CAPACITY.get = function () { return 10 };
 
-	  Object.defineProperties( STRtree, staticAccessors );
+	          return this;
+	        }; // private methods
 
-	  return STRtree;
-	}(AbstractSTRtree));
+	        /**
+	         * Calculate the SHA-512 of a raw string
+	         */
 
-	var STRtreeNode = (function (AbstractNode$$1) {
-	  function STRtreeNode () {
-	    var level = arguments[0];
-	    AbstractNode$$1.call(this, level);
-	  }
 
-	  if ( AbstractNode$$1 ) { STRtreeNode.__proto__ = AbstractNode$$1; }
-	  STRtreeNode.prototype = Object.create( AbstractNode$$1 && AbstractNode$$1.prototype );
-	  STRtreeNode.prototype.constructor = STRtreeNode;
-	  STRtreeNode.prototype.computeBounds = function computeBounds () {
-	    var bounds = null;
-	    for (var i = this.getChildBoundables().iterator(); i.hasNext();) {
-	      var childBoundable = i.next();
-	      if (bounds === null) {
-	        bounds = new Envelope(childBoundable.getBounds());
-	      } else {
-	        bounds.expandToInclude(childBoundable.getBounds());
-	      }
-	    }
-	    return bounds
-	  };
-	  STRtreeNode.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  STRtreeNode.prototype.getClass = function getClass () {
-	    return STRtreeNode
-	  };
+	        function rstr(s, utf8) {
+	          s = utf8 ? utf8Encode(s) : s;
+	          return binb2rstr(binb(rstr2binb(s), s.length * 8));
+	        }
+	        /**
+	         * Calculate the HMAC-sha256 of a key and some data (raw strings)
+	         */
 
-	  return STRtreeNode;
-	}(AbstractNode));
 
-	var SegmentPointComparator = function SegmentPointComparator () {};
+	        function rstr_hmac(key, data) {
+	          key = utf8 ? utf8Encode(key) : key;
+	          data = utf8 ? utf8Encode(data) : data;
+	          var hash,
+	              i = 0,
+	              bkey = rstr2binb(key),
+	              ipad = Array(16),
+	              opad = Array(16);
 
-	SegmentPointComparator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SegmentPointComparator.prototype.getClass = function getClass () {
-	  return SegmentPointComparator
-	};
-	SegmentPointComparator.relativeSign = function relativeSign (x0, x1) {
-	  if (x0 < x1) { return -1 }
-	  if (x0 > x1) { return 1 }
-	  return 0
-	};
-	SegmentPointComparator.compare = function compare (octant, p0, p1) {
-	  if (p0.equals2D(p1)) { return 0 }
-	  var xSign = SegmentPointComparator.relativeSign(p0.x, p1.x);
-	  var ySign = SegmentPointComparator.relativeSign(p0.y, p1.y);
-	  switch (octant) {
-	    case 0:
-	      return SegmentPointComparator.compareValue(xSign, ySign)
-	    case 1:
-	      return SegmentPointComparator.compareValue(ySign, xSign)
-	    case 2:
-	      return SegmentPointComparator.compareValue(ySign, -xSign)
-	    case 3:
-	      return SegmentPointComparator.compareValue(-xSign, ySign)
-	    case 4:
-	      return SegmentPointComparator.compareValue(-xSign, -ySign)
-	    case 5:
-	      return SegmentPointComparator.compareValue(-ySign, -xSign)
-	    case 6:
-	      return SegmentPointComparator.compareValue(-ySign, xSign)
-	    case 7:
-	      return SegmentPointComparator.compareValue(xSign, -ySign)
-	  }
-	  Assert.shouldNeverReachHere('invalid octant value');
-	  return 0
-	};
-	SegmentPointComparator.compareValue = function compareValue (compareSign0, compareSign1) {
-	  if (compareSign0 < 0) { return -1 }
-	  if (compareSign0 > 0) { return 1 }
-	  if (compareSign1 < 0) { return -1 }
-	  if (compareSign1 > 0) { return 1 }
-	  return 0
-	};
+	          if (bkey.length > 16) {
+	            bkey = binb(bkey, key.length * 8);
+	          }
 
-	var SegmentNode = function SegmentNode () {
-	  this._segString = null;
-	  this.coord = null;
-	  this.segmentIndex = null;
-	  this._segmentOctant = null;
-	  this._isInterior = null;
-	  var segString = arguments[0];
-	  var coord = arguments[1];
-	  var segmentIndex = arguments[2];
-	  var segmentOctant = arguments[3];
-	  this._segString = segString;
-	  this.coord = new Coordinate(coord);
-	  this.segmentIndex = segmentIndex;
-	  this._segmentOctant = segmentOctant;
-	  this._isInterior = !coord.equals2D(segString.getCoordinate(segmentIndex));
-	};
-	SegmentNode.prototype.getCoordinate = function getCoordinate () {
-	  return this.coord
-	};
-	SegmentNode.prototype.print = function print (out) {
-	  out.print(this.coord);
-	  out.print(' seg # = ' + this.segmentIndex);
-	};
-	SegmentNode.prototype.compareTo = function compareTo (obj) {
-	  var other = obj;
-	  if (this.segmentIndex < other.segmentIndex) { return -1 }
-	  if (this.segmentIndex > other.segmentIndex) { return 1 }
-	  if (this.coord.equals2D(other.coord)) { return 0 }
-	  return SegmentPointComparator.compare(this._segmentOctant, this.coord, other.coord)
-	};
-	SegmentNode.prototype.isEndPoint = function isEndPoint (maxSegmentIndex) {
-	  if (this.segmentIndex === 0 && !this._isInterior) { return true }
-	  if (this.segmentIndex === maxSegmentIndex) { return true }
-	  return false
-	};
-	SegmentNode.prototype.isInterior = function isInterior () {
-	  return this._isInterior
-	};
-	SegmentNode.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable]
-	};
-	SegmentNode.prototype.getClass = function getClass () {
-	  return SegmentNode
-	};
+	          for (; i < 16; i += 1) {
+	            ipad[i] = bkey[i] ^ 0x36363636;
+	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	          }
 
-	// import Iterator from '../../../../java/util/Iterator'
-	var SegmentNodeList = function SegmentNodeList () {
-	  this._nodeMap = new TreeMap();
-	  this._edge = null;
-	  var edge = arguments[0];
-	  this._edge = edge;
-	};
-	SegmentNodeList.prototype.getSplitCoordinates = function getSplitCoordinates () {
-	    var this$1 = this;
-
-	  var coordList = new CoordinateList();
-	  this.addEndpoints();
-	  var it = this.iterator();
-	  var eiPrev = it.next();
-	  while (it.hasNext()) {
-	    var ei = it.next();
-	    this$1.addEdgeCoordinates(eiPrev, ei, coordList);
-	    eiPrev = ei;
-	  }
-	  return coordList.toCoordinateArray()
-	};
-	SegmentNodeList.prototype.addCollapsedNodes = function addCollapsedNodes () {
-	    var this$1 = this;
+	          hash = binb(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
+	          return binb2rstr(binb(opad.concat(hash), 512 + 256));
+	        }
+	        /*
+	         * Main sha256 function, with its support functions
+	         */
 
-	  var collapsedVertexIndexes = new ArrayList();
-	  this.findCollapsesFromInsertedNodes(collapsedVertexIndexes);
-	  this.findCollapsesFromExistingVertices(collapsedVertexIndexes);
-	  for (var it = collapsedVertexIndexes.iterator(); it.hasNext();) {
-	    var vertexIndex = it.next().intValue();
-	    this$1.add(this$1._edge.getCoordinate(vertexIndex), vertexIndex);
-	  }
-	};
-	SegmentNodeList.prototype.print = function print (out) {
-	  out.println('Intersections:');
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var ei = it.next();
-	    ei.print(out);
-	  }
-	};
-	SegmentNodeList.prototype.findCollapsesFromExistingVertices = function findCollapsesFromExistingVertices (collapsedVertexIndexes) {
-	    var this$1 = this;
 
-	  for (var i = 0; i < this._edge.size() - 2; i++) {
-	    var p0 = this$1._edge.getCoordinate(i);
-	    // const p1 = this._edge.getCoordinate(i + 1)
-	    var p2 = this$1._edge.getCoordinate(i + 2);
-	    if (p0.equals2D(p2)) {
-	      collapsedVertexIndexes.add(new Integer(i + 1));
-	    }
-	  }
-	};
-	SegmentNodeList.prototype.addEdgeCoordinates = function addEdgeCoordinates (ei0, ei1, coordList) {
-	    var this$1 = this;
-
-	  // let npts = ei1.segmentIndex - ei0.segmentIndex + 2
-	  var lastSegStartPt = this._edge.getCoordinate(ei1.segmentIndex);
-	  var useIntPt1 = ei1.isInterior() || !ei1.coord.equals2D(lastSegStartPt);
-	  // if (!useIntPt1) {
-	  // npts--
-	  // }
-	  // const ipt = 0
-	  coordList.add(new Coordinate(ei0.coord), false);
-	  for (var i = ei0.segmentIndex + 1; i <= ei1.segmentIndex; i++) {
-	    coordList.add(this$1._edge.getCoordinate(i));
-	  }
-	  if (useIntPt1) {
-	    coordList.add(new Coordinate(ei1.coord));
-	  }
-	};
-	SegmentNodeList.prototype.iterator = function iterator () {
-	  return this._nodeMap.values().iterator()
-	};
-	SegmentNodeList.prototype.addSplitEdges = function addSplitEdges (edgeList) {
-	    var this$1 = this;
-
-	  this.addEndpoints();
-	  this.addCollapsedNodes();
-	  var it = this.iterator();
-	  var eiPrev = it.next();
-	  while (it.hasNext()) {
-	    var ei = it.next();
-	    var newEdge = this$1.createSplitEdge(eiPrev, ei);
-	    edgeList.add(newEdge);
-	    eiPrev = ei;
-	  }
-	};
-	SegmentNodeList.prototype.findCollapseIndex = function findCollapseIndex (ei0, ei1, collapsedVertexIndex) {
-	  if (!ei0.coord.equals2D(ei1.coord)) { return false }
-	  var numVerticesBetween = ei1.segmentIndex - ei0.segmentIndex;
-	  if (!ei1.isInterior()) {
-	    numVerticesBetween--;
-	  }
-	  if (numVerticesBetween === 1) {
-	    collapsedVertexIndex[0] = ei0.segmentIndex + 1;
-	    return true
-	  }
-	  return false
-	};
-	SegmentNodeList.prototype.findCollapsesFromInsertedNodes = function findCollapsesFromInsertedNodes (collapsedVertexIndexes) {
-	    var this$1 = this;
-
-	  var collapsedVertexIndex = new Array(1).fill(null);
-	  var it = this.iterator();
-	  var eiPrev = it.next();
-	  while (it.hasNext()) {
-	    var ei = it.next();
-	    var isCollapsed = this$1.findCollapseIndex(eiPrev, ei, collapsedVertexIndex);
-	    if (isCollapsed) { collapsedVertexIndexes.add(new Integer(collapsedVertexIndex[0])); }
-	    eiPrev = ei;
-	  }
-	};
-	SegmentNodeList.prototype.getEdge = function getEdge () {
-	  return this._edge
-	};
-	SegmentNodeList.prototype.addEndpoints = function addEndpoints () {
-	  var maxSegIndex = this._edge.size() - 1;
-	  this.add(this._edge.getCoordinate(0), 0);
-	  this.add(this._edge.getCoordinate(maxSegIndex), maxSegIndex);
-	};
-	SegmentNodeList.prototype.createSplitEdge = function createSplitEdge (ei0, ei1) {
-	    var this$1 = this;
-
-	  var npts = ei1.segmentIndex - ei0.segmentIndex + 2;
-	  var lastSegStartPt = this._edge.getCoordinate(ei1.segmentIndex);
-	  var useIntPt1 = ei1.isInterior() || !ei1.coord.equals2D(lastSegStartPt);
-	  if (!useIntPt1) {
-	    npts--;
-	  }
-	  var pts = new Array(npts).fill(null);
-	  var ipt = 0;
-	  pts[ipt++] = new Coordinate(ei0.coord);
-	  for (var i = ei0.segmentIndex + 1; i <= ei1.segmentIndex; i++) {
-	    pts[ipt++] = this$1._edge.getCoordinate(i);
-	  }
-	  if (useIntPt1) { pts[ipt] = new Coordinate(ei1.coord); }
-	  return new NodedSegmentString(pts, this._edge.getData())
-	};
-	SegmentNodeList.prototype.add = function add (intPt, segmentIndex) {
-	  var eiNew = new SegmentNode(this._edge, intPt, segmentIndex, this._edge.getSegmentOctant(segmentIndex));
-	  var ei = this._nodeMap.get(eiNew);
-	  if (ei !== null) {
-	    Assert.isTrue(ei.coord.equals2D(intPt), 'Found equal nodes with different coordinates');
-	    return ei
-	  }
-	  this._nodeMap.put(eiNew, eiNew);
-	  return eiNew
-	};
-	SegmentNodeList.prototype.checkSplitEdgesCorrectness = function checkSplitEdgesCorrectness (splitEdges) {
-	  var edgePts = this._edge.getCoordinates();
-	  var split0 = splitEdges.get(0);
-	  var pt0 = split0.getCoordinate(0);
-	  if (!pt0.equals2D(edgePts[0])) { throw new RuntimeException('bad split edge start point at ' + pt0) }
-	  var splitn = splitEdges.get(splitEdges.size() - 1);
-	  var splitnPts = splitn.getCoordinates();
-	  var ptn = splitnPts[splitnPts.length - 1];
-	  if (!ptn.equals2D(edgePts[edgePts.length - 1])) { throw new RuntimeException('bad split edge end point at ' + ptn) }
-	};
-	SegmentNodeList.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SegmentNodeList.prototype.getClass = function getClass () {
-	  return SegmentNodeList
-	};
+	        function sha256_S(X, n) {
+	          return X >>> n | X << 32 - n;
+	        }
 
+	        function sha256_R(X, n) {
+	          return X >>> n;
+	        }
 
+	        function sha256_Ch(x, y, z) {
+	          return x & y ^ ~x & z;
+	        }
 
-	// class NodeVertexIterator {
-	//   constructor () {
-	//     this._nodeList = null
-	//     this._edge = null
-	//     this._nodeIt = null
-	//     this._currNode = null
-	//     this._nextNode = null
-	//     this._currSegIndex = 0
-	//     let nodeList = arguments[0]
-	//     this._nodeList = nodeList
-	//     this._edge = nodeList.getEdge()
-	//     this._nodeIt = nodeList.iterator()
-	//     this.readNextNode()
-	//   }
-	//   next () {
-	//     if (this._currNode === null) {
-	//       this._currNode = this._nextNode
-	//       this._currSegIndex = this._currNode.segmentIndex
-	//       this.readNextNode()
-	//       return this._currNode
-	//     }
-	//     if (this._nextNode === null) return null
-	//     if (this._nextNode.segmentIndex === this._currNode.segmentIndex) {
-	//       this._currNode = this._nextNode
-	//       this._currSegIndex = this._currNode.segmentIndex
-	//       this.readNextNode()
-	//       return this._currNode
-	//     }
-	//     if (this._nextNode.segmentIndex > this._currNode.segmentIndex) {}
-	//     return null
-	//   }
-	//   remove () {
-	//     // throw new UnsupportedOperationException(this.getClass().getName())
-	//   }
-	//   hasNext () {
-	//     if (this._nextNode === null) return false
-	//     return true
-	//   }
-	//   readNextNode () {
-	//     if (this._nodeIt.hasNext()) this._nextNode = this._nodeIt.next(); else this._nextNode = null
-	//   }
-	//   interfaces_ () {
-	//     return [Iterator]
-	//   }
-	//   getClass () {
-	//     return NodeVertexIterator
-	//   }
-	// }
+	        function sha256_Maj(x, y, z) {
+	          return x & y ^ x & z ^ y & z;
+	        }
 
-	var Octant = function Octant () {};
+	        function sha256_Sigma0256(x) {
+	          return sha256_S(x, 2) ^ sha256_S(x, 13) ^ sha256_S(x, 22);
+	        }
 
-	Octant.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Octant.prototype.getClass = function getClass () {
-	  return Octant
-	};
-	Octant.octant = function octant () {
-	  if (typeof arguments[0] === 'number' && typeof arguments[1] === 'number') {
-	    var dx = arguments[0];
-	    var dy = arguments[1];
-	    if (dx === 0.0 && dy === 0.0) { throw new IllegalArgumentException('Cannot compute the octant for point ( ' + dx + ', ' + dy + ' )') }
-	    var adx = Math.abs(dx);
-	    var ady = Math.abs(dy);
-	    if (dx >= 0) {
-	      if (dy >= 0) {
-	        if (adx >= ady) { return 0; } else { return 1 }
-	      } else {
-	        if (adx >= ady) { return 7; } else { return 6 }
-	      }
-	    } else {
-	      if (dy >= 0) {
-	        if (adx >= ady) { return 3; } else { return 2 }
-	      } else {
-	        if (adx >= ady) { return 4; } else { return 5 }
-	      }
-	    }
-	  } else if (arguments[0] instanceof Coordinate && arguments[1] instanceof Coordinate) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    var dx$1 = p1.x - p0.x;
-	    var dy$1 = p1.y - p0.y;
-	    if (dx$1 === 0.0 && dy$1 === 0.0) { throw new IllegalArgumentException('Cannot compute the octant for two identical points ' + p0) }
-	    return Octant.octant(dx$1, dy$1)
-	  }
-	};
+	        function sha256_Sigma1256(x) {
+	          return sha256_S(x, 6) ^ sha256_S(x, 11) ^ sha256_S(x, 25);
+	        }
 
-	var SegmentString = function SegmentString () {};
+	        function sha256_Gamma0256(x) {
+	          return sha256_S(x, 7) ^ sha256_S(x, 18) ^ sha256_R(x, 3);
+	        }
 
-	SegmentString.prototype.getCoordinates = function getCoordinates () {};
-	SegmentString.prototype.size = function size () {};
-	SegmentString.prototype.getCoordinate = function getCoordinate (i) {};
-	SegmentString.prototype.isClosed = function isClosed () {};
-	SegmentString.prototype.setData = function setData (data) {};
-	SegmentString.prototype.getData = function getData () {};
-	SegmentString.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SegmentString.prototype.getClass = function getClass () {
-	  return SegmentString
-	};
+	        function sha256_Gamma1256(x) {
+	          return sha256_S(x, 17) ^ sha256_S(x, 19) ^ sha256_R(x, 10);
+	        }
 
-	var NodableSegmentString = function NodableSegmentString () {};
+	        sha256_K = [1116352408, 1899447441, -1245643825, -373957723, 961987163, 1508970993, -1841331548, -1424204075, -670586216, 310598401, 607225278, 1426881987, 1925078388, -2132889090, -1680079193, -1046744716, -459576895, -272742522, 264347078, 604807628, 770255983, 1249150122, 1555081692, 1996064986, -1740746414, -1473132947, -1341970488, -1084653625, -958395405, -710438585, 113926993, 338241895, 666307205, 773529912, 1294757372, 1396182291, 1695183700, 1986661051, -2117940946, -1838011259, -1564481375, -1474664885, -1035236496, -949202525, -778901479, -694614492, -200395387, 275423344, 430227734, 506948616, 659060556, 883997877, 958139571, 1322822218, 1537002063, 1747873779, 1955562222, 2024104815, -2067236844, -1933114872, -1866530822, -1538233109, -1090935817, -965641998];
 
-	NodableSegmentString.prototype.addIntersection = function addIntersection (intPt, segmentIndex) {};
-	NodableSegmentString.prototype.interfaces_ = function interfaces_ () {
-	  return [SegmentString]
-	};
-	NodableSegmentString.prototype.getClass = function getClass () {
-	  return NodableSegmentString
-	};
+	        function binb(m, l) {
+	          var HASH = [1779033703, -1150833019, 1013904242, -1521486534, 1359893119, -1694144372, 528734635, 1541459225];
+	          var W = new Array(64);
+	          var a, b, c, d, e, f, g, h;
+	          var i, j, T1, T2;
+	          /* append padding */
 
-	var NodedSegmentString = function NodedSegmentString () {
-	  this._nodeList = new SegmentNodeList(this);
-	  this._pts = null;
-	  this._data = null;
-	  var pts = arguments[0];
-	  var data = arguments[1];
-	  this._pts = pts;
-	  this._data = data;
-	};
-	NodedSegmentString.prototype.getCoordinates = function getCoordinates () {
-	  return this._pts
-	};
-	NodedSegmentString.prototype.size = function size () {
-	  return this._pts.length
-	};
-	NodedSegmentString.prototype.getCoordinate = function getCoordinate (i) {
-	  return this._pts[i]
-	};
-	NodedSegmentString.prototype.isClosed = function isClosed () {
-	  return this._pts[0].equals(this._pts[this._pts.length - 1])
-	};
-	NodedSegmentString.prototype.getSegmentOctant = function getSegmentOctant (index) {
-	  if (index === this._pts.length - 1) { return -1 }
-	  return this.safeOctant(this.getCoordinate(index), this.getCoordinate(index + 1))
-	};
-	NodedSegmentString.prototype.setData = function setData (data) {
-	  this._data = data;
-	};
-	NodedSegmentString.prototype.safeOctant = function safeOctant (p0, p1) {
-	  if (p0.equals2D(p1)) { return 0 }
-	  return Octant.octant(p0, p1)
-	};
-	NodedSegmentString.prototype.getData = function getData () {
-	  return this._data
-	};
-	NodedSegmentString.prototype.addIntersection = function addIntersection () {
-	  if (arguments.length === 2) {
-	    var intPt$1 = arguments[0];
-	    var segmentIndex = arguments[1];
-	    this.addIntersectionNode(intPt$1, segmentIndex);
-	  } else if (arguments.length === 4) {
-	    var li = arguments[0];
-	    var segmentIndex$1 = arguments[1];
-	    // const geomIndex = arguments[2]
-	    var intIndex = arguments[3];
-	    var intPt = new Coordinate(li.getIntersection(intIndex));
-	    this.addIntersection(intPt, segmentIndex$1);
-	  }
-	};
-	NodedSegmentString.prototype.toString = function toString () {
-	  return WKTWriter.toLineString(new CoordinateArraySequence(this._pts))
-	};
-	NodedSegmentString.prototype.getNodeList = function getNodeList () {
-	  return this._nodeList
-	};
-	NodedSegmentString.prototype.addIntersectionNode = function addIntersectionNode (intPt, segmentIndex) {
-	  var normalizedSegmentIndex = segmentIndex;
-	  var nextSegIndex = normalizedSegmentIndex + 1;
-	  if (nextSegIndex < this._pts.length) {
-	    var nextPt = this._pts[nextSegIndex];
-	    if (intPt.equals2D(nextPt)) {
-	      normalizedSegmentIndex = nextSegIndex;
-	    }
-	  }
-	  var ei = this._nodeList.add(intPt, normalizedSegmentIndex);
-	  return ei
-	};
-	NodedSegmentString.prototype.addIntersections = function addIntersections (li, segmentIndex, geomIndex) {
-	    var this$1 = this;
+	          m[l >> 5] |= 0x80 << 24 - l % 32;
+	          m[(l + 64 >> 9 << 4) + 15] = l;
 
-	  for (var i = 0; i < li.getIntersectionNum(); i++) {
-	    this$1.addIntersection(li, segmentIndex, geomIndex, i);
-	  }
-	};
-	NodedSegmentString.prototype.interfaces_ = function interfaces_ () {
-	  return [NodableSegmentString]
-	};
-	NodedSegmentString.prototype.getClass = function getClass () {
-	  return NodedSegmentString
-	};
-	NodedSegmentString.getNodedSubstrings = function getNodedSubstrings () {
-	  if (arguments.length === 1) {
-	    var segStrings = arguments[0];
-	    var resultEdgelist = new ArrayList();
-	    NodedSegmentString.getNodedSubstrings(segStrings, resultEdgelist);
-	    return resultEdgelist
-	  } else if (arguments.length === 2) {
-	    var segStrings$1 = arguments[0];
-	    var resultEdgelist$1 = arguments[1];
-	    for (var i = segStrings$1.iterator(); i.hasNext();) {
-	      var ss = i.next();
-	      ss.getNodeList().addSplitEdges(resultEdgelist$1);
-	    }
-	  }
-	};
+	          for (i = 0; i < m.length; i += 16) {
+	            a = HASH[0];
+	            b = HASH[1];
+	            c = HASH[2];
+	            d = HASH[3];
+	            e = HASH[4];
+	            f = HASH[5];
+	            g = HASH[6];
+	            h = HASH[7];
 
-	var LineSegment = function LineSegment () {
-	  this.p0 = null;
-	  this.p1 = null;
-	  if (arguments.length === 0) {
-	    this.p0 = new Coordinate();
-	    this.p1 = new Coordinate();
-	  } else if (arguments.length === 1) {
-	    var ls = arguments[0];
-	    this.p0 = new Coordinate(ls.p0);
-	    this.p1 = new Coordinate(ls.p1);
-	  } else if (arguments.length === 2) {
-	    this.p0 = arguments[0];
-	    this.p1 = arguments[1];
-	  } else if (arguments.length === 4) {
-	    var x0 = arguments[0];
-	    var y0 = arguments[1];
-	    var x1 = arguments[2];
-	    var y1 = arguments[3];
-	    this.p0 = new Coordinate(x0, y0);
-	    this.p1 = new Coordinate(x1, y1);
-	  }
-	};
+	            for (j = 0; j < 64; j += 1) {
+	              if (j < 16) {
+	                W[j] = m[j + i];
+	              } else {
+	                W[j] = safe_add(safe_add(safe_add(sha256_Gamma1256(W[j - 2]), W[j - 7]), sha256_Gamma0256(W[j - 15])), W[j - 16]);
+	              }
 
-	var staticAccessors$24 = { serialVersionUID: { configurable: true } };
-	LineSegment.prototype.minX = function minX () {
-	  return Math.min(this.p0.x, this.p1.x)
-	};
-	LineSegment.prototype.orientationIndex = function orientationIndex () {
-	  if (arguments[0] instanceof LineSegment) {
-	    var seg = arguments[0];
-	    var orient0 = CGAlgorithms.orientationIndex(this.p0, this.p1, seg.p0);
-	    var orient1 = CGAlgorithms.orientationIndex(this.p0, this.p1, seg.p1);
-	    if (orient0 >= 0 && orient1 >= 0) { return Math.max(orient0, orient1) }
-	    if (orient0 <= 0 && orient1 <= 0) { return Math.max(orient0, orient1) }
-	    return 0
-	  } else if (arguments[0] instanceof Coordinate) {
-	    var p = arguments[0];
-	    return CGAlgorithms.orientationIndex(this.p0, this.p1, p)
-	  }
-	};
-	LineSegment.prototype.toGeometry = function toGeometry (geomFactory) {
-	  return geomFactory.createLineString([this.p0, this.p1])
-	};
-	LineSegment.prototype.isVertical = function isVertical () {
-	  return this.p0.x === this.p1.x
-	};
-	LineSegment.prototype.equals = function equals (o) {
-	  if (!(o instanceof LineSegment)) {
-	    return false
-	  }
-	  var other = o;
-	  return this.p0.equals(other.p0) && this.p1.equals(other.p1)
-	};
-	LineSegment.prototype.intersection = function intersection (line) {
-	  var li = new RobustLineIntersector();
-	  li.computeIntersection(this.p0, this.p1, line.p0, line.p1);
-	  if (li.hasIntersection()) { return li.getIntersection(0) }
-	  return null
-	};
-	LineSegment.prototype.project = function project () {
-	  if (arguments[0] instanceof Coordinate) {
-	    var p = arguments[0];
-	    if (p.equals(this.p0) || p.equals(this.p1)) { return new Coordinate(p) }
-	    var r = this.projectionFactor(p);
-	    var coord = new Coordinate();
-	    coord.x = this.p0.x + r * (this.p1.x - this.p0.x);
-	    coord.y = this.p0.y + r * (this.p1.y - this.p0.y);
-	    return coord
-	  } else if (arguments[0] instanceof LineSegment) {
-	    var seg = arguments[0];
-	    var pf0 = this.projectionFactor(seg.p0);
-	    var pf1 = this.projectionFactor(seg.p1);
-	    if (pf0 >= 1.0 && pf1 >= 1.0) { return null }
-	    if (pf0 <= 0.0 && pf1 <= 0.0) { return null }
-	    var newp0 = this.project(seg.p0);
-	    if (pf0 < 0.0) { newp0 = this.p0; }
-	    if (pf0 > 1.0) { newp0 = this.p1; }
-	    var newp1 = this.project(seg.p1);
-	    if (pf1 < 0.0) { newp1 = this.p0; }
-	    if (pf1 > 1.0) { newp1 = this.p1; }
-	    return new LineSegment(newp0, newp1)
-	  }
-	};
-	LineSegment.prototype.normalize = function normalize () {
-	  if (this.p1.compareTo(this.p0) < 0) { this.reverse(); }
-	};
-	LineSegment.prototype.angle = function angle () {
-	  return Math.atan2(this.p1.y - this.p0.y, this.p1.x - this.p0.x)
-	};
-	LineSegment.prototype.getCoordinate = function getCoordinate (i) {
-	  if (i === 0) { return this.p0 }
-	  return this.p1
-	};
-	LineSegment.prototype.distancePerpendicular = function distancePerpendicular (p) {
-	  return CGAlgorithms.distancePointLinePerpendicular(p, this.p0, this.p1)
-	};
-	LineSegment.prototype.minY = function minY () {
-	  return Math.min(this.p0.y, this.p1.y)
-	};
-	LineSegment.prototype.midPoint = function midPoint () {
-	  return LineSegment.midPoint(this.p0, this.p1)
-	};
-	LineSegment.prototype.projectionFactor = function projectionFactor (p) {
-	  if (p.equals(this.p0)) { return 0.0 }
-	  if (p.equals(this.p1)) { return 1.0 }
-	  var dx = this.p1.x - this.p0.x;
-	  var dy = this.p1.y - this.p0.y;
-	  var len = dx * dx + dy * dy;
-	  if (len <= 0.0) { return Double.NaN }
-	  var r = ((p.x - this.p0.x) * dx + (p.y - this.p0.y) * dy) / len;
-	  return r
-	};
-	LineSegment.prototype.closestPoints = function closestPoints (line) {
-	  var intPt = this.intersection(line);
-	  if (intPt !== null) {
-	    return [intPt, intPt]
-	  }
-	  var closestPt = new Array(2).fill(null);
-	  var minDistance = Double.MAX_VALUE;
-	  var dist = null;
-	  var close00 = this.closestPoint(line.p0);
-	  minDistance = close00.distance(line.p0);
-	  closestPt[0] = close00;
-	  closestPt[1] = line.p0;
-	  var close01 = this.closestPoint(line.p1);
-	  dist = close01.distance(line.p1);
-	  if (dist < minDistance) {
-	    minDistance = dist;
-	    closestPt[0] = close01;
-	    closestPt[1] = line.p1;
-	  }
-	  var close10 = line.closestPoint(this.p0);
-	  dist = close10.distance(this.p0);
-	  if (dist < minDistance) {
-	    minDistance = dist;
-	    closestPt[0] = this.p0;
-	    closestPt[1] = close10;
-	  }
-	  var close11 = line.closestPoint(this.p1);
-	  dist = close11.distance(this.p1);
-	  if (dist < minDistance) {
-	    minDistance = dist;
-	    closestPt[0] = this.p1;
-	    closestPt[1] = close11;
-	  }
-	  return closestPt
-	};
-	LineSegment.prototype.closestPoint = function closestPoint (p) {
-	  var factor = this.projectionFactor(p);
-	  if (factor > 0 && factor < 1) {
-	    return this.project(p)
-	  }
-	  var dist0 = this.p0.distance(p);
-	  var dist1 = this.p1.distance(p);
-	  if (dist0 < dist1) { return this.p0 }
-	  return this.p1
-	};
-	LineSegment.prototype.maxX = function maxX () {
-	  return Math.max(this.p0.x, this.p1.x)
-	};
-	LineSegment.prototype.getLength = function getLength () {
-	  return this.p0.distance(this.p1)
-	};
-	LineSegment.prototype.compareTo = function compareTo (o) {
-	  var other = o;
-	  var comp0 = this.p0.compareTo(other.p0);
-	  if (comp0 !== 0) { return comp0 }
-	  return this.p1.compareTo(other.p1)
-	};
-	LineSegment.prototype.reverse = function reverse () {
-	  var temp = this.p0;
-	  this.p0 = this.p1;
-	  this.p1 = temp;
-	};
-	LineSegment.prototype.equalsTopo = function equalsTopo (other) {
-	  return this.p0.equals(other.p0) &&
-	        (this.p1.equals(other.p1) || this.p0.equals(other.p1)) &&
-	         this.p1.equals(other.p0)
-	};
-	LineSegment.prototype.lineIntersection = function lineIntersection (line) {
-	  try {
-	    var intPt = HCoordinate.intersection(this.p0, this.p1, line.p0, line.p1);
-	    return intPt
-	  } catch (ex) {
-	    if (ex instanceof NotRepresentableException) ; else { throw ex }
-	  } finally {}
-	  return null
-	};
-	LineSegment.prototype.maxY = function maxY () {
-	  return Math.max(this.p0.y, this.p1.y)
-	};
-	LineSegment.prototype.pointAlongOffset = function pointAlongOffset (segmentLengthFraction, offsetDistance) {
-	  var segx = this.p0.x + segmentLengthFraction * (this.p1.x - this.p0.x);
-	  var segy = this.p0.y + segmentLengthFraction * (this.p1.y - this.p0.y);
-	  var dx = this.p1.x - this.p0.x;
-	  var dy = this.p1.y - this.p0.y;
-	  var len = Math.sqrt(dx * dx + dy * dy);
-	  var ux = 0.0;
-	  var uy = 0.0;
-	  if (offsetDistance !== 0.0) {
-	    if (len <= 0.0) { throw new Error('Cannot compute offset from zero-length line segment') }
-	    ux = offsetDistance * dx / len;
-	    uy = offsetDistance * dy / len;
-	  }
-	  var offsetx = segx - uy;
-	  var offsety = segy + ux;
-	  var coord = new Coordinate(offsetx, offsety);
-	  return coord
-	};
-	LineSegment.prototype.setCoordinates = function setCoordinates () {
-	  if (arguments.length === 1) {
-	    var ls = arguments[0];
-	    this.setCoordinates(ls.p0, ls.p1);
-	  } else if (arguments.length === 2) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    this.p0.x = p0.x;
-	    this.p0.y = p0.y;
-	    this.p1.x = p1.x;
-	    this.p1.y = p1.y;
-	  }
-	};
-	LineSegment.prototype.segmentFraction = function segmentFraction (inputPt) {
-	  var segFrac = this.projectionFactor(inputPt);
-	  if (segFrac < 0.0) { segFrac = 0.0; } else if (segFrac > 1.0 || Double.isNaN(segFrac)) { segFrac = 1.0; }
-	  return segFrac
-	};
-	LineSegment.prototype.toString = function toString () {
-	  return 'LINESTRING( ' + this.p0.x + ' ' + this.p0.y + ', ' + this.p1.x + ' ' + this.p1.y + ')'
-	};
-	LineSegment.prototype.isHorizontal = function isHorizontal () {
-	  return this.p0.y === this.p1.y
-	};
-	LineSegment.prototype.distance = function distance () {
-	  if (arguments[0] instanceof LineSegment) {
-	    var ls = arguments[0];
-	    return CGAlgorithms.distanceLineLine(this.p0, this.p1, ls.p0, ls.p1)
-	  } else if (arguments[0] instanceof Coordinate) {
-	    var p = arguments[0];
-	    return CGAlgorithms.distancePointLine(p, this.p0, this.p1)
-	  }
-	};
-	LineSegment.prototype.pointAlong = function pointAlong (segmentLengthFraction) {
-	  var coord = new Coordinate();
-	  coord.x = this.p0.x + segmentLengthFraction * (this.p1.x - this.p0.x);
-	  coord.y = this.p0.y + segmentLengthFraction * (this.p1.y - this.p0.y);
-	  return coord
-	};
-	LineSegment.prototype.hashCode = function hashCode () {
-	  var bits0 = Double.doubleToLongBits(this.p0.x);
-	  bits0 ^= Double.doubleToLongBits(this.p0.y) * 31;
-	  var hash0 = Math.trunc(bits0) ^ Math.trunc(bits0 >> 32);
-	  var bits1 = Double.doubleToLongBits(this.p1.x);
-	  bits1 ^= Double.doubleToLongBits(this.p1.y) * 31;
-	  var hash1 = Math.trunc(bits1) ^ Math.trunc(bits1 >> 32);
-	  return hash0 ^ hash1
-	};
-	LineSegment.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable, Serializable]
-	};
-	LineSegment.prototype.getClass = function getClass () {
-	  return LineSegment
-	};
-	LineSegment.midPoint = function midPoint (p0, p1) {
-	  return new Coordinate((p0.x + p1.x) / 2, (p0.y + p1.y) / 2)
-	};
-	staticAccessors$24.serialVersionUID.get = function () { return 3252005833466256227 };
+	              T1 = safe_add(safe_add(safe_add(safe_add(h, sha256_Sigma1256(e)), sha256_Ch(e, f, g)), sha256_K[j]), W[j]);
+	              T2 = safe_add(sha256_Sigma0256(a), sha256_Maj(a, b, c));
+	              h = g;
+	              g = f;
+	              f = e;
+	              e = safe_add(d, T1);
+	              d = c;
+	              c = b;
+	              b = a;
+	              a = safe_add(T1, T2);
+	            }
+
+	            HASH[0] = safe_add(a, HASH[0]);
+	            HASH[1] = safe_add(b, HASH[1]);
+	            HASH[2] = safe_add(c, HASH[2]);
+	            HASH[3] = safe_add(d, HASH[3]);
+	            HASH[4] = safe_add(e, HASH[4]);
+	            HASH[5] = safe_add(f, HASH[5]);
+	            HASH[6] = safe_add(g, HASH[6]);
+	            HASH[7] = safe_add(h, HASH[7]);
+	          }
 
-	Object.defineProperties( LineSegment, staticAccessors$24 );
+	          return HASH;
+	        }
+	      },
 
-	var MonotoneChainOverlapAction = function MonotoneChainOverlapAction () {
-	  this.tempEnv1 = new Envelope();
-	  this.tempEnv2 = new Envelope();
-	  this._overlapSeg1 = new LineSegment();
-	  this._overlapSeg2 = new LineSegment();
-	};
-	MonotoneChainOverlapAction.prototype.overlap = function overlap () {
-	  if (arguments.length === 2) ; else if (arguments.length === 4) {
-	    var mc1 = arguments[0];
-	    var start1 = arguments[1];
-	    var mc2 = arguments[2];
-	    var start2 = arguments[3];
-	    mc1.getLineSegment(start1, this._overlapSeg1);
-	    mc2.getLineSegment(start2, this._overlapSeg2);
-	    this.overlap(this._overlapSeg1, this._overlapSeg2);
-	  }
-	};
-	MonotoneChainOverlapAction.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MonotoneChainOverlapAction.prototype.getClass = function getClass () {
-	  return MonotoneChainOverlapAction
-	};
+	      /**
+	       * @class Hashes.SHA512
+	       * @param {config}
+	       *
+	       * A JavaScript implementation of the Secure Hash Algorithm, SHA-512, as defined in FIPS 180-2
+	       * Version 2.2 Copyright Anonymous Contributor, Paul Johnston 2000 - 2009.
+	       * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+	       * See http://pajhome.org.uk/crypt/md5 for details.
+	       */
+	      SHA512: function SHA512(options) {
+	        /**
+	         * Private properties configuration variables. You may need to tweak these to be compatible with
+	         * the server-side, but the defaults work in most cases.
+	         * @see this.setUpperCase() method
+	         * @see this.setPad() method
+	         */
+	        options && typeof options.uppercase === 'boolean' ? options.uppercase : false;
+
+	        var /* hexadecimal output case format. false - lowercase; true - uppercase  */
+	        b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
 
-	var MonotoneChain = function MonotoneChain () {
-	  this._pts = null;
-	  this._start = null;
-	  this._end = null;
-	  this._env = null;
-	  this._context = null;
-	  this._id = null;
-	  var pts = arguments[0];
-	  var start = arguments[1];
-	  var end = arguments[2];
-	  var context = arguments[3];
-	  this._pts = pts;
-	  this._start = start;
-	  this._end = end;
-	  this._context = context;
-	};
-	MonotoneChain.prototype.getLineSegment = function getLineSegment (index, ls) {
-	  ls.p0 = this._pts[index];
-	  ls.p1 = this._pts[index + 1];
-	};
-	MonotoneChain.prototype.computeSelect = function computeSelect (searchEnv, start0, end0, mcs) {
-	  var p0 = this._pts[start0];
-	  var p1 = this._pts[end0];
-	  mcs.tempEnv1.init(p0, p1);
-	  if (end0 - start0 === 1) {
-	    mcs.select(this, start0);
-	    return null
-	  }
-	  if (!searchEnv.intersects(mcs.tempEnv1)) { return null }
-	  var mid = Math.trunc((start0 + end0) / 2);
-	  if (start0 < mid) {
-	    this.computeSelect(searchEnv, start0, mid, mcs);
-	  }
-	  if (mid < end0) {
-	    this.computeSelect(searchEnv, mid, end0, mcs);
-	  }
-	};
-	MonotoneChain.prototype.getCoordinates = function getCoordinates () {
-	    var this$1 = this;
+	        /* base-64 pad character. Default '=' for strict RFC compliance   */
+	        utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
 
-	  var coord = new Array(this._end - this._start + 1).fill(null);
-	  var index = 0;
-	  for (var i = this._start; i <= this._end; i++) {
-	    coord[index++] = this$1._pts[i];
-	  }
-	  return coord
-	};
-	MonotoneChain.prototype.computeOverlaps = function computeOverlaps (mc, mco) {
-	  this.computeOverlapsInternal(this._start, this._end, mc, mc._start, mc._end, mco);
-	};
-	MonotoneChain.prototype.setId = function setId (id) {
-	  this._id = id;
-	};
-	MonotoneChain.prototype.select = function select (searchEnv, mcs) {
-	  this.computeSelect(searchEnv, this._start, this._end, mcs);
-	};
-	MonotoneChain.prototype.getEnvelope = function getEnvelope () {
-	  if (this._env === null) {
-	    var p0 = this._pts[this._start];
-	    var p1 = this._pts[this._end];
-	    this._env = new Envelope(p0, p1);
-	  }
-	  return this._env
-	};
-	MonotoneChain.prototype.getEndIndex = function getEndIndex () {
-	  return this._end
-	};
-	MonotoneChain.prototype.getStartIndex = function getStartIndex () {
-	  return this._start
-	};
-	MonotoneChain.prototype.getContext = function getContext () {
-	  return this._context
-	};
-	MonotoneChain.prototype.getId = function getId () {
-	  return this._id
-	};
-	MonotoneChain.prototype.computeOverlapsInternal = function computeOverlapsInternal (start0, end0, mc, start1, end1, mco) {
-	  var p00 = this._pts[start0];
-	  var p01 = this._pts[end0];
-	  var p10 = mc._pts[start1];
-	  var p11 = mc._pts[end1];
-	  if (end0 - start0 === 1 && end1 - start1 === 1) {
-	    mco.overlap(this, start0, mc, start1);
-	    return null
-	  }
-	  mco.tempEnv1.init(p00, p01);
-	  mco.tempEnv2.init(p10, p11);
-	  if (!mco.tempEnv1.intersects(mco.tempEnv2)) { return null }
-	  var mid0 = Math.trunc((start0 + end0) / 2);
-	  var mid1 = Math.trunc((start1 + end1) / 2);
-	  if (start0 < mid0) {
-	    if (start1 < mid1) { this.computeOverlapsInternal(start0, mid0, mc, start1, mid1, mco); }
-	    if (mid1 < end1) { this.computeOverlapsInternal(start0, mid0, mc, mid1, end1, mco); }
-	  }
-	  if (mid0 < end0) {
-	    if (start1 < mid1) { this.computeOverlapsInternal(mid0, end0, mc, start1, mid1, mco); }
-	    if (mid1 < end1) { this.computeOverlapsInternal(mid0, end0, mc, mid1, end1, mco); }
-	  }
-	};
-	MonotoneChain.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MonotoneChain.prototype.getClass = function getClass () {
-	  return MonotoneChain
-	};
+	        /* enable/disable utf8 encoding */
+	        sha512_k;
+	        /* privileged (public) methods */
 
-	var MonotoneChainBuilder = function MonotoneChainBuilder () {};
+	        this.hex = function (s) {
+	          return rstr2hex(rstr(s));
+	        };
 
-	MonotoneChainBuilder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MonotoneChainBuilder.prototype.getClass = function getClass () {
-	  return MonotoneChainBuilder
-	};
-	MonotoneChainBuilder.getChainStartIndices = function getChainStartIndices (pts) {
-	  var start = 0;
-	  var startIndexList = new ArrayList();
-	  startIndexList.add(new Integer(start));
-	  do {
-	    var last = MonotoneChainBuilder.findChainEnd(pts, start);
-	    startIndexList.add(new Integer(last));
-	    start = last;
-	  } while (start < pts.length - 1)
-	  var startIndex = MonotoneChainBuilder.toIntArray(startIndexList);
-	  return startIndex
-	};
-	MonotoneChainBuilder.findChainEnd = function findChainEnd (pts, start) {
-	  var safeStart = start;
-	  while (safeStart < pts.length - 1 && pts[safeStart].equals2D(pts[safeStart + 1])) {
-	    safeStart++;
-	  }
-	  if (safeStart >= pts.length - 1) {
-	    return pts.length - 1
-	  }
-	  var chainQuad = Quadrant.quadrant(pts[safeStart], pts[safeStart + 1]);
-	  var last = start + 1;
-	  while (last < pts.length) {
-	    if (!pts[last - 1].equals2D(pts[last])) {
-	      var quad = Quadrant.quadrant(pts[last - 1], pts[last]);
-	      if (quad !== chainQuad) { break }
-	    }
-	    last++;
-	  }
-	  return last - 1
-	};
-	MonotoneChainBuilder.getChains = function getChains () {
-	  if (arguments.length === 1) {
-	    var pts = arguments[0];
-	    return MonotoneChainBuilder.getChains(pts, null)
-	  } else if (arguments.length === 2) {
-	    var pts$1 = arguments[0];
-	    var context = arguments[1];
-	    var mcList = new ArrayList();
-	    var startIndex = MonotoneChainBuilder.getChainStartIndices(pts$1);
-	    for (var i = 0; i < startIndex.length - 1; i++) {
-	      var mc = new MonotoneChain(pts$1, startIndex[i], startIndex[i + 1], context);
-	      mcList.add(mc);
-	    }
-	    return mcList
-	  }
-	};
-	MonotoneChainBuilder.toIntArray = function toIntArray (list) {
-	  var array = new Array(list.size()).fill(null);
-	  for (var i = 0; i < array.length; i++) {
-	    array[i] = list.get(i).intValue();
-	  }
-	  return array
-	};
+	        this.b64 = function (s) {
+	          return rstr2b64(rstr(s), b64pad);
+	        };
 
-	var Noder = function Noder () {};
+	        this.any = function (s, e) {
+	          return rstr2any(rstr(s), e);
+	        };
 
-	Noder.prototype.computeNodes = function computeNodes (segStrings) {};
-	Noder.prototype.getNodedSubstrings = function getNodedSubstrings () {};
-	Noder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Noder.prototype.getClass = function getClass () {
-	  return Noder
-	};
+	        this.raw = function (s) {
+	          return rstr(s);
+	        };
 
-	var SinglePassNoder = function SinglePassNoder () {
-	  this._segInt = null;
-	  if (arguments.length === 0) ; else if (arguments.length === 1) {
-	    var segInt = arguments[0];
-	    this.setSegmentIntersector(segInt);
-	  }
-	};
-	SinglePassNoder.prototype.setSegmentIntersector = function setSegmentIntersector (segInt) {
-	  this._segInt = segInt;
-	};
-	SinglePassNoder.prototype.interfaces_ = function interfaces_ () {
-	  return [Noder]
-	};
-	SinglePassNoder.prototype.getClass = function getClass () {
-	  return SinglePassNoder
-	};
+	        this.hex_hmac = function (k, d) {
+	          return rstr2hex(rstr_hmac(k, d));
+	        };
 
-	var MCIndexNoder = (function (SinglePassNoder$$1) {
-	  function MCIndexNoder (si) {
-	    if (si) { SinglePassNoder$$1.call(this, si); }
-	    else { SinglePassNoder$$1.call(this); }
-	    this._monoChains = new ArrayList();
-	    this._index = new STRtree();
-	    this._idCounter = 0;
-	    this._nodedSegStrings = null;
-	    this._nOverlaps = 0;
-	  }
+	        this.b64_hmac = function (k, d) {
+	          return rstr2b64(rstr_hmac(k, d), b64pad);
+	        };
 
-	  if ( SinglePassNoder$$1 ) { MCIndexNoder.__proto__ = SinglePassNoder$$1; }
-	  MCIndexNoder.prototype = Object.create( SinglePassNoder$$1 && SinglePassNoder$$1.prototype );
-	  MCIndexNoder.prototype.constructor = MCIndexNoder;
+	        this.any_hmac = function (k, d, e) {
+	          return rstr2any(rstr_hmac(k, d), e);
+	        };
+	        /**
+	         * Perform a simple self-test to see if the VM is working
+	         * @return {String} Hexadecimal hash sample
+	         * @public
+	         */
 
-	  var staticAccessors = { SegmentOverlapAction: { configurable: true } };
-	  MCIndexNoder.prototype.getMonotoneChains = function getMonotoneChains () {
-	    return this._monoChains
-	  };
-	  MCIndexNoder.prototype.getNodedSubstrings = function getNodedSubstrings () {
-	    return NodedSegmentString.getNodedSubstrings(this._nodedSegStrings)
-	  };
-	  MCIndexNoder.prototype.getIndex = function getIndex () {
-	    return this._index
-	  };
-	  MCIndexNoder.prototype.add = function add (segStr) {
-	    var this$1 = this;
-
-	    var segChains = MonotoneChainBuilder.getChains(segStr.getCoordinates(), segStr);
-	    for (var i = segChains.iterator(); i.hasNext();) {
-	      var mc = i.next();
-	      mc.setId(this$1._idCounter++);
-	      this$1._index.insert(mc.getEnvelope(), mc);
-	      this$1._monoChains.add(mc);
-	    }
-	  };
-	  MCIndexNoder.prototype.computeNodes = function computeNodes (inputSegStrings) {
-	    var this$1 = this;
-
-	    this._nodedSegStrings = inputSegStrings;
-	    for (var i = inputSegStrings.iterator(); i.hasNext();) {
-	      this$1.add(i.next());
-	    }
-	    this.intersectChains();
-	  };
-	  MCIndexNoder.prototype.intersectChains = function intersectChains () {
-	    var this$1 = this;
-
-	    var overlapAction = new SegmentOverlapAction(this._segInt);
-	    for (var i = this._monoChains.iterator(); i.hasNext();) {
-	      var queryChain = i.next();
-	      var overlapChains = this$1._index.query(queryChain.getEnvelope());
-	      for (var j = overlapChains.iterator(); j.hasNext();) {
-	        var testChain = j.next();
-	        if (testChain.getId() > queryChain.getId()) {
-	          queryChain.computeOverlaps(testChain, overlapAction);
-	          this$1._nOverlaps++;
-	        }
-	        if (this$1._segInt.isDone()) { return null }
-	      }
-	    }
-	  };
-	  MCIndexNoder.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  MCIndexNoder.prototype.getClass = function getClass () {
-	    return MCIndexNoder
-	  };
-	  staticAccessors.SegmentOverlapAction.get = function () { return SegmentOverlapAction };
-
-	  Object.defineProperties( MCIndexNoder, staticAccessors );
-
-	  return MCIndexNoder;
-	}(SinglePassNoder));
-
-	var SegmentOverlapAction = (function (MonotoneChainOverlapAction$$1) {
-	  function SegmentOverlapAction () {
-	    MonotoneChainOverlapAction$$1.call(this);
-	    this._si = null;
-	    var si = arguments[0];
-	    this._si = si;
-	  }
-
-	  if ( MonotoneChainOverlapAction$$1 ) { SegmentOverlapAction.__proto__ = MonotoneChainOverlapAction$$1; }
-	  SegmentOverlapAction.prototype = Object.create( MonotoneChainOverlapAction$$1 && MonotoneChainOverlapAction$$1.prototype );
-	  SegmentOverlapAction.prototype.constructor = SegmentOverlapAction;
-	  SegmentOverlapAction.prototype.overlap = function overlap () {
-	    if (arguments.length === 4) {
-	      var mc1 = arguments[0];
-	      var start1 = arguments[1];
-	      var mc2 = arguments[2];
-	      var start2 = arguments[3];
-	      var ss1 = mc1.getContext();
-	      var ss2 = mc2.getContext();
-	      this._si.processIntersections(ss1, start1, ss2, start2);
-	    } else { return MonotoneChainOverlapAction$$1.prototype.overlap.apply(this, arguments) }
-	  };
-	  SegmentOverlapAction.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  SegmentOverlapAction.prototype.getClass = function getClass () {
-	    return SegmentOverlapAction
-	  };
-
-	  return SegmentOverlapAction;
-	}(MonotoneChainOverlapAction));
 
-	var BufferParameters = function BufferParameters () {
-	  this._quadrantSegments = BufferParameters.DEFAULT_QUADRANT_SEGMENTS;
-	  this._endCapStyle = BufferParameters.CAP_ROUND;
-	  this._joinStyle = BufferParameters.JOIN_ROUND;
-	  this._mitreLimit = BufferParameters.DEFAULT_MITRE_LIMIT;
-	  this._isSingleSided = false;
-	  this._simplifyFactor = BufferParameters.DEFAULT_SIMPLIFY_FACTOR;
+	        this.vm_test = function () {
+	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+	        };
+	        /**
+	         * @description Enable/disable uppercase hexadecimal returned string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	  if (arguments.length === 0) ; else if (arguments.length === 1) {
-	    var quadrantSegments = arguments[0];
-	    this.setQuadrantSegments(quadrantSegments);
-	  } else if (arguments.length === 2) {
-	    var quadrantSegments$1 = arguments[0];
-	    var endCapStyle = arguments[1];
-	    this.setQuadrantSegments(quadrantSegments$1);
-	    this.setEndCapStyle(endCapStyle);
-	  } else if (arguments.length === 4) {
-	    var quadrantSegments$2 = arguments[0];
-	    var endCapStyle$1 = arguments[1];
-	    var joinStyle = arguments[2];
-	    var mitreLimit = arguments[3];
-	    this.setQuadrantSegments(quadrantSegments$2);
-	    this.setEndCapStyle(endCapStyle$1);
-	    this.setJoinStyle(joinStyle);
-	    this.setMitreLimit(mitreLimit);
-	  }
-	};
 
-	var staticAccessors$25 = { CAP_ROUND: { configurable: true },CAP_FLAT: { configurable: true },CAP_SQUARE: { configurable: true },JOIN_ROUND: { configurable: true },JOIN_MITRE: { configurable: true },JOIN_BEVEL: { configurable: true },DEFAULT_QUADRANT_SEGMENTS: { configurable: true },DEFAULT_MITRE_LIMIT: { configurable: true },DEFAULT_SIMPLIFY_FACTOR: { configurable: true } };
-	BufferParameters.prototype.getEndCapStyle = function getEndCapStyle () {
-	  return this._endCapStyle
-	};
-	BufferParameters.prototype.isSingleSided = function isSingleSided () {
-	  return this._isSingleSided
-	};
-	BufferParameters.prototype.setQuadrantSegments = function setQuadrantSegments (quadSegs) {
-	  this._quadrantSegments = quadSegs;
-	  if (this._quadrantSegments === 0) { this._joinStyle = BufferParameters.JOIN_BEVEL; }
-	  if (this._quadrantSegments < 0) {
-	    this._joinStyle = BufferParameters.JOIN_MITRE;
-	    this._mitreLimit = Math.abs(this._quadrantSegments);
-	  }
-	  if (quadSegs <= 0) {
-	    this._quadrantSegments = 1;
-	  }
-	  if (this._joinStyle !== BufferParameters.JOIN_ROUND) {
-	    this._quadrantSegments = BufferParameters.DEFAULT_QUADRANT_SEGMENTS;
-	  }
-	};
-	BufferParameters.prototype.getJoinStyle = function getJoinStyle () {
-	  return this._joinStyle
-	};
-	BufferParameters.prototype.setJoinStyle = function setJoinStyle (joinStyle) {
-	  this._joinStyle = joinStyle;
-	};
-	BufferParameters.prototype.setSimplifyFactor = function setSimplifyFactor (simplifyFactor) {
-	  this._simplifyFactor = simplifyFactor < 0 ? 0 : simplifyFactor;
-	};
-	BufferParameters.prototype.getSimplifyFactor = function getSimplifyFactor () {
-	  return this._simplifyFactor
-	};
-	BufferParameters.prototype.getQuadrantSegments = function getQuadrantSegments () {
-	  return this._quadrantSegments
-	};
-	BufferParameters.prototype.setEndCapStyle = function setEndCapStyle (endCapStyle) {
-	  this._endCapStyle = endCapStyle;
-	};
-	BufferParameters.prototype.getMitreLimit = function getMitreLimit () {
-	  return this._mitreLimit
-	};
-	BufferParameters.prototype.setMitreLimit = function setMitreLimit (mitreLimit) {
-	  this._mitreLimit = mitreLimit;
-	};
-	BufferParameters.prototype.setSingleSided = function setSingleSided (isSingleSided) {
-	  this._isSingleSided = isSingleSided;
-	};
-	BufferParameters.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BufferParameters.prototype.getClass = function getClass () {
-	  return BufferParameters
-	};
-	BufferParameters.bufferDistanceError = function bufferDistanceError (quadSegs) {
-	  var alpha = Math.PI / 2.0 / quadSegs;
-	  return 1 - Math.cos(alpha / 2.0)
-	};
-	staticAccessors$25.CAP_ROUND.get = function () { return 1 };
-	staticAccessors$25.CAP_FLAT.get = function () { return 2 };
-	staticAccessors$25.CAP_SQUARE.get = function () { return 3 };
-	staticAccessors$25.JOIN_ROUND.get = function () { return 1 };
-	staticAccessors$25.JOIN_MITRE.get = function () { return 2 };
-	staticAccessors$25.JOIN_BEVEL.get = function () { return 3 };
-	staticAccessors$25.DEFAULT_QUADRANT_SEGMENTS.get = function () { return 8 };
-	staticAccessors$25.DEFAULT_MITRE_LIMIT.get = function () { return 5.0 };
-	staticAccessors$25.DEFAULT_SIMPLIFY_FACTOR.get = function () { return 0.01 };
-
-	Object.defineProperties( BufferParameters, staticAccessors$25 );
-
-	var BufferInputLineSimplifier = function BufferInputLineSimplifier (inputLine) {
-	  this._distanceTol = null;
-	  this._isDeleted = null;
-	  this._angleOrientation = CGAlgorithms.COUNTERCLOCKWISE;
-	  this._inputLine = inputLine || null;
-	};
+	        this.setUpperCase = function (a) {
 
-	var staticAccessors$26 = { INIT: { configurable: true },DELETE: { configurable: true },KEEP: { configurable: true },NUM_PTS_TO_CHECK: { configurable: true } };
-	BufferInputLineSimplifier.prototype.isDeletable = function isDeletable (i0, i1, i2, distanceTol) {
-	  var p0 = this._inputLine[i0];
-	  var p1 = this._inputLine[i1];
-	  var p2 = this._inputLine[i2];
-	  if (!this.isConcave(p0, p1, p2)) { return false }
-	  if (!this.isShallow(p0, p1, p2, distanceTol)) { return false }
-	  return this.isShallowSampled(p0, p1, i0, i2, distanceTol)
-	};
-	BufferInputLineSimplifier.prototype.deleteShallowConcavities = function deleteShallowConcavities () {
-	    var this$1 = this;
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {string} Pad
+	         * @return {Object} this
+	         * @public
+	         */
 
-	  var index = 1;
-	  // const maxIndex = this._inputLine.length - 1
-	  var midIndex = this.findNextNonDeletedIndex(index);
-	  var lastIndex = this.findNextNonDeletedIndex(midIndex);
-	  var isChanged = false;
-	  while (lastIndex < this._inputLine.length) {
-	    var isMiddleVertexDeleted = false;
-	    if (this$1.isDeletable(index, midIndex, lastIndex, this$1._distanceTol)) {
-	      this$1._isDeleted[midIndex] = BufferInputLineSimplifier.DELETE;
-	      isMiddleVertexDeleted = true;
-	      isChanged = true;
-	    }
-	    if (isMiddleVertexDeleted) { index = lastIndex; } else { index = midIndex; }
-	    midIndex = this$1.findNextNonDeletedIndex(index);
-	    lastIndex = this$1.findNextNonDeletedIndex(midIndex);
-	  }
-	  return isChanged
-	};
-	BufferInputLineSimplifier.prototype.isShallowConcavity = function isShallowConcavity (p0, p1, p2, distanceTol) {
-	  var orientation = CGAlgorithms.computeOrientation(p0, p1, p2);
-	  var isAngleToSimplify = orientation === this._angleOrientation;
-	  if (!isAngleToSimplify) { return false }
-	  var dist = CGAlgorithms.distancePointLine(p1, p0, p2);
-	  return dist < distanceTol
-	};
-	BufferInputLineSimplifier.prototype.isShallowSampled = function isShallowSampled (p0, p2, i0, i2, distanceTol) {
-	    var this$1 = this;
 
-	  var inc = Math.trunc((i2 - i0) / BufferInputLineSimplifier.NUM_PTS_TO_CHECK);
-	  if (inc <= 0) { inc = 1; }
-	  for (var i = i0; i < i2; i += inc) {
-	    if (!this$1.isShallow(p0, p2, this$1._inputLine[i], distanceTol)) { return false }
-	  }
-	  return true
-	};
-	BufferInputLineSimplifier.prototype.isConcave = function isConcave (p0, p1, p2) {
-	  var orientation = CGAlgorithms.computeOrientation(p0, p1, p2);
-	  var isConcave = orientation === this._angleOrientation;
-	  return isConcave
-	};
-	BufferInputLineSimplifier.prototype.simplify = function simplify (distanceTol) {
-	    var this$1 = this;
+	        this.setPad = function (a) {
+	          b64pad = a || b64pad;
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
+
+
+	        this.setUTF8 = function (a) {
+	          if (typeof a === 'boolean') {
+	            utf8 = a;
+	          }
 
-	  this._distanceTol = Math.abs(distanceTol);
-	  if (distanceTol < 0) { this._angleOrientation = CGAlgorithms.CLOCKWISE; }
-	  this._isDeleted = new Array(this._inputLine.length).fill(null);
-	  var isChanged = false;
-	  do {
-	    isChanged = this$1.deleteShallowConcavities();
-	  } while (isChanged)
-	  return this.collapseLine()
-	};
-	BufferInputLineSimplifier.prototype.findNextNonDeletedIndex = function findNextNonDeletedIndex (index) {
-	  var next = index + 1;
-	  while (next < this._inputLine.length && this._isDeleted[next] === BufferInputLineSimplifier.DELETE) { next++; }
-	  return next
-	};
-	BufferInputLineSimplifier.prototype.isShallow = function isShallow (p0, p1, p2, distanceTol) {
-	  var dist = CGAlgorithms.distancePointLine(p1, p0, p2);
-	  return dist < distanceTol
-	};
-	BufferInputLineSimplifier.prototype.collapseLine = function collapseLine () {
-	    var this$1 = this;
+	          return this;
+	        };
+	        /* private methods */
 
-	  var coordList = new CoordinateList();
-	  for (var i = 0; i < this._inputLine.length; i++) {
-	    if (this$1._isDeleted[i] !== BufferInputLineSimplifier.DELETE) { coordList.add(this$1._inputLine[i]); }
-	  }
-	  return coordList.toCoordinateArray()
-	};
-	BufferInputLineSimplifier.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BufferInputLineSimplifier.prototype.getClass = function getClass () {
-	  return BufferInputLineSimplifier
-	};
-	BufferInputLineSimplifier.simplify = function simplify (inputLine, distanceTol) {
-	  var simp = new BufferInputLineSimplifier(inputLine);
-	  return simp.simplify(distanceTol)
-	};
-	staticAccessors$26.INIT.get = function () { return 0 };
-	staticAccessors$26.DELETE.get = function () { return 1 };
-	staticAccessors$26.KEEP.get = function () { return 1 };
-	staticAccessors$26.NUM_PTS_TO_CHECK.get = function () { return 10 };
-
-	Object.defineProperties( BufferInputLineSimplifier, staticAccessors$26 );
-
-	var OffsetSegmentString = function OffsetSegmentString () {
-	  this._ptList = null;
-	  this._precisionModel = null;
-	  this._minimimVertexDistance = 0.0;
-	  this._ptList = new ArrayList();
-	};
+	        /**
+	         * Calculate the SHA-512 of a raw string
+	         */
 
-	var staticAccessors$28 = { COORDINATE_ARRAY_TYPE: { configurable: true } };
-	OffsetSegmentString.prototype.getCoordinates = function getCoordinates () {
-	  var coord = this._ptList.toArray(OffsetSegmentString.COORDINATE_ARRAY_TYPE);
-	  return coord
-	};
-	OffsetSegmentString.prototype.setPrecisionModel = function setPrecisionModel (precisionModel) {
-	  this._precisionModel = precisionModel;
-	};
-	OffsetSegmentString.prototype.addPt = function addPt (pt) {
-	  var bufPt = new Coordinate(pt);
-	  this._precisionModel.makePrecise(bufPt);
-	  if (this.isRedundant(bufPt)) { return null }
-	  this._ptList.add(bufPt);
-	};
-	OffsetSegmentString.prototype.revere = function revere () {};
-	OffsetSegmentString.prototype.addPts = function addPts (pt, isForward) {
-	    var this$1 = this;
 
-	  if (isForward) {
-	    for (var i = 0; i < pt.length; i++) {
-	      this$1.addPt(pt[i]);
-	    }
-	  } else {
-	    for (var i$1 = pt.length - 1; i$1 >= 0; i$1--) {
-	      this$1.addPt(pt[i$1]);
-	    }
-	  }
-	};
-	OffsetSegmentString.prototype.isRedundant = function isRedundant (pt) {
-	  if (this._ptList.size() < 1) { return false }
-	  var lastPt = this._ptList.get(this._ptList.size() - 1);
-	  var ptDist = pt.distance(lastPt);
-	  if (ptDist < this._minimimVertexDistance) { return true }
-	  return false
-	};
-	OffsetSegmentString.prototype.toString = function toString () {
-	  var fact = new GeometryFactory();
-	  var line = fact.createLineString(this.getCoordinates());
-	  return line.toString()
-	};
-	OffsetSegmentString.prototype.closeRing = function closeRing () {
-	  if (this._ptList.size() < 1) { return null }
-	  var startPt = new Coordinate(this._ptList.get(0));
-	  var lastPt = this._ptList.get(this._ptList.size() - 1);
-	  // const last2Pt = null
-	  // if (this._ptList.size() >= 2) last2Pt = this._ptList.get(this._ptList.size() - 2)
-	  if (startPt.equals(lastPt)) { return null }
-	  this._ptList.add(startPt);
-	};
-	OffsetSegmentString.prototype.setMinimumVertexDistance = function setMinimumVertexDistance (minimimVertexDistance) {
-	  this._minimimVertexDistance = minimimVertexDistance;
-	};
-	OffsetSegmentString.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	OffsetSegmentString.prototype.getClass = function getClass () {
-	  return OffsetSegmentString
-	};
-	staticAccessors$28.COORDINATE_ARRAY_TYPE.get = function () { return new Array(0).fill(null) };
+	        function rstr(s) {
+	          s = utf8 ? utf8Encode(s) : s;
+	          return binb2rstr(binb(rstr2binb(s), s.length * 8));
+	        }
+	        /*
+	         * Calculate the HMAC-SHA-512 of a key and some data (raw strings)
+	         */
 
-	Object.defineProperties( OffsetSegmentString, staticAccessors$28 );
 
-	var Angle = function Angle () {};
+	        function rstr_hmac(key, data) {
+	          key = utf8 ? utf8Encode(key) : key;
+	          data = utf8 ? utf8Encode(data) : data;
+	          var hash,
+	              i = 0,
+	              bkey = rstr2binb(key),
+	              ipad = Array(32),
+	              opad = Array(32);
 
-	var staticAccessors$29 = { PI_TIMES_2: { configurable: true },PI_OVER_2: { configurable: true },PI_OVER_4: { configurable: true },COUNTERCLOCKWISE: { configurable: true },CLOCKWISE: { configurable: true },NONE: { configurable: true } };
+	          if (bkey.length > 32) {
+	            bkey = binb(bkey, key.length * 8);
+	          }
 
-	Angle.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Angle.prototype.getClass = function getClass () {
-	  return Angle
-	};
-	Angle.toDegrees = function toDegrees (radians) {
-	  return radians * 180 / Math.PI
-	};
-	Angle.normalize = function normalize (angle) {
-	  while (angle > Math.PI) { angle -= Angle.PI_TIMES_2; }
-	  while (angle <= -Math.PI) { angle += Angle.PI_TIMES_2; }
-	  return angle
-	};
-	Angle.angle = function angle () {
-	  if (arguments.length === 1) {
-	    var p = arguments[0];
-	    return Math.atan2(p.y, p.x)
-	  } else if (arguments.length === 2) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    var dx = p1.x - p0.x;
-	    var dy = p1.y - p0.y;
-	    return Math.atan2(dy, dx)
-	  }
-	};
-	Angle.isAcute = function isAcute (p0, p1, p2) {
-	  var dx0 = p0.x - p1.x;
-	  var dy0 = p0.y - p1.y;
-	  var dx1 = p2.x - p1.x;
-	  var dy1 = p2.y - p1.y;
-	  var dotprod = dx0 * dx1 + dy0 * dy1;
-	  return dotprod > 0
-	};
-	Angle.isObtuse = function isObtuse (p0, p1, p2) {
-	  var dx0 = p0.x - p1.x;
-	  var dy0 = p0.y - p1.y;
-	  var dx1 = p2.x - p1.x;
-	  var dy1 = p2.y - p1.y;
-	  var dotprod = dx0 * dx1 + dy0 * dy1;
-	  return dotprod < 0
-	};
-	Angle.interiorAngle = function interiorAngle (p0, p1, p2) {
-	  var anglePrev = Angle.angle(p1, p0);
-	  var angleNext = Angle.angle(p1, p2);
-	  return Math.abs(angleNext - anglePrev)
-	};
-	Angle.normalizePositive = function normalizePositive (angle) {
-	  if (angle < 0.0) {
-	    while (angle < 0.0) { angle += Angle.PI_TIMES_2; }
-	    if (angle >= Angle.PI_TIMES_2) { angle = 0.0; }
-	  } else {
-	    while (angle >= Angle.PI_TIMES_2) { angle -= Angle.PI_TIMES_2; }
-	    if (angle < 0.0) { angle = 0.0; }
-	  }
-	  return angle
-	};
-	Angle.angleBetween = function angleBetween (tip1, tail, tip2) {
-	  var a1 = Angle.angle(tail, tip1);
-	  var a2 = Angle.angle(tail, tip2);
-	  return Angle.diff(a1, a2)
-	};
-	Angle.diff = function diff (ang1, ang2) {
-	  var delAngle = null;
-	  if (ang1 < ang2) {
-	    delAngle = ang2 - ang1;
-	  } else {
-	    delAngle = ang1 - ang2;
-	  }
-	  if (delAngle > Math.PI) {
-	    delAngle = 2 * Math.PI - delAngle;
-	  }
-	  return delAngle
-	};
-	Angle.toRadians = function toRadians (angleDegrees) {
-	  return angleDegrees * Math.PI / 180.0
-	};
-	Angle.getTurn = function getTurn (ang1, ang2) {
-	  var crossproduct = Math.sin(ang2 - ang1);
-	  if (crossproduct > 0) {
-	    return Angle.COUNTERCLOCKWISE
-	  }
-	  if (crossproduct < 0) {
-	    return Angle.CLOCKWISE
-	  }
-	  return Angle.NONE
-	};
-	Angle.angleBetweenOriented = function angleBetweenOriented (tip1, tail, tip2) {
-	  var a1 = Angle.angle(tail, tip1);
-	  var a2 = Angle.angle(tail, tip2);
-	  var angDel = a2 - a1;
-	  if (angDel <= -Math.PI) { return angDel + Angle.PI_TIMES_2 }
-	  if (angDel > Math.PI) { return angDel - Angle.PI_TIMES_2 }
-	  return angDel
-	};
-	staticAccessors$29.PI_TIMES_2.get = function () { return 2.0 * Math.PI };
-	staticAccessors$29.PI_OVER_2.get = function () { return Math.PI / 2.0 };
-	staticAccessors$29.PI_OVER_4.get = function () { return Math.PI / 4.0 };
-	staticAccessors$29.COUNTERCLOCKWISE.get = function () { return CGAlgorithms.COUNTERCLOCKWISE };
-	staticAccessors$29.CLOCKWISE.get = function () { return CGAlgorithms.CLOCKWISE };
-	staticAccessors$29.NONE.get = function () { return CGAlgorithms.COLLINEAR };
-
-	Object.defineProperties( Angle, staticAccessors$29 );
-
-	var OffsetSegmentGenerator = function OffsetSegmentGenerator () {
-	  this._maxCurveSegmentError = 0.0;
-	  this._filletAngleQuantum = null;
-	  this._closingSegLengthFactor = 1;
-	  this._segList = null;
-	  this._distance = 0.0;
-	  this._precisionModel = null;
-	  this._bufParams = null;
-	  this._li = null;
-	  this._s0 = null;
-	  this._s1 = null;
-	  this._s2 = null;
-	  this._seg0 = new LineSegment();
-	  this._seg1 = new LineSegment();
-	  this._offset0 = new LineSegment();
-	  this._offset1 = new LineSegment();
-	  this._side = 0;
-	  this._hasNarrowConcaveAngle = false;
-	  var precisionModel = arguments[0];
-	  var bufParams = arguments[1];
-	  var distance = arguments[2];
-	  this._precisionModel = precisionModel;
-	  this._bufParams = bufParams;
-	  this._li = new RobustLineIntersector();
-	  this._filletAngleQuantum = Math.PI / 2.0 / bufParams.getQuadrantSegments();
-	  if (bufParams.getQuadrantSegments() >= 8 && bufParams.getJoinStyle() === BufferParameters.JOIN_ROUND) { this._closingSegLengthFactor = OffsetSegmentGenerator.MAX_CLOSING_SEG_LEN_FACTOR; }
-	  this.init(distance);
-	};
+	          for (; i < 32; i += 1) {
+	            ipad[i] = bkey[i] ^ 0x36363636;
+	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	          }
 
-	var staticAccessors$27 = { OFFSET_SEGMENT_SEPARATION_FACTOR: { configurable: true },INSIDE_TURN_VERTEX_SNAP_DISTANCE_FACTOR: { configurable: true },CURVE_VERTEX_SNAP_DISTANCE_FACTOR: { configurable: true },MAX_CLOSING_SEG_LEN_FACTOR: { configurable: true } };
-	OffsetSegmentGenerator.prototype.addNextSegment = function addNextSegment (p, addStartPoint) {
-	  this._s0 = this._s1;
-	  this._s1 = this._s2;
-	  this._s2 = p;
-	  this._seg0.setCoordinates(this._s0, this._s1);
-	  this.computeOffsetSegment(this._seg0, this._side, this._distance, this._offset0);
-	  this._seg1.setCoordinates(this._s1, this._s2);
-	  this.computeOffsetSegment(this._seg1, this._side, this._distance, this._offset1);
-	  if (this._s1.equals(this._s2)) { return null }
-	  var orientation = CGAlgorithms.computeOrientation(this._s0, this._s1, this._s2);
-	  var outsideTurn = (orientation === CGAlgorithms.CLOCKWISE && this._side === Position.LEFT) || (orientation === CGAlgorithms.COUNTERCLOCKWISE && this._side === Position.RIGHT);
-	  if (orientation === 0) {
-	    this.addCollinear(addStartPoint);
-	  } else if (outsideTurn) {
-	    this.addOutsideTurn(orientation, addStartPoint);
-	  } else {
-	    this.addInsideTurn(orientation, addStartPoint);
-	  }
-	};
-	OffsetSegmentGenerator.prototype.addLineEndCap = function addLineEndCap (p0, p1) {
-	  var seg = new LineSegment(p0, p1);
-	  var offsetL = new LineSegment();
-	  this.computeOffsetSegment(seg, Position.LEFT, this._distance, offsetL);
-	  var offsetR = new LineSegment();
-	  this.computeOffsetSegment(seg, Position.RIGHT, this._distance, offsetR);
-	  var dx = p1.x - p0.x;
-	  var dy = p1.y - p0.y;
-	  var angle = Math.atan2(dy, dx);
-	  switch (this._bufParams.getEndCapStyle()) {
-	    case BufferParameters.CAP_ROUND:
-	      this._segList.addPt(offsetL.p1);
-	      this.addFilletArc(p1, angle + Math.PI / 2, angle - Math.PI / 2, CGAlgorithms.CLOCKWISE, this._distance);
-	      this._segList.addPt(offsetR.p1);
-	      break
-	    case BufferParameters.CAP_FLAT:
-	      this._segList.addPt(offsetL.p1);
-	      this._segList.addPt(offsetR.p1);
-	      break
-	    case BufferParameters.CAP_SQUARE:
-	      var squareCapSideOffset = new Coordinate();
-	      squareCapSideOffset.x = Math.abs(this._distance) * Math.cos(angle);
-	      squareCapSideOffset.y = Math.abs(this._distance) * Math.sin(angle);
-	      var squareCapLOffset = new Coordinate(offsetL.p1.x + squareCapSideOffset.x, offsetL.p1.y + squareCapSideOffset.y);
-	      var squareCapROffset = new Coordinate(offsetR.p1.x + squareCapSideOffset.x, offsetR.p1.y + squareCapSideOffset.y);
-	      this._segList.addPt(squareCapLOffset);
-	      this._segList.addPt(squareCapROffset);
-	      break
-	  }
-	};
-	OffsetSegmentGenerator.prototype.getCoordinates = function getCoordinates () {
-	  var pts = this._segList.getCoordinates();
-	  return pts
-	};
-	OffsetSegmentGenerator.prototype.addMitreJoin = function addMitreJoin (p, offset0, offset1, distance) {
-	  var isMitreWithinLimit = true;
-	  var intPt = null;
-	  try {
-	    intPt = HCoordinate.intersection(offset0.p0, offset0.p1, offset1.p0, offset1.p1);
-	    var mitreRatio = distance <= 0.0 ? 1.0 : intPt.distance(p) / Math.abs(distance);
-	    if (mitreRatio > this._bufParams.getMitreLimit()) { isMitreWithinLimit = false; }
-	  } catch (ex) {
-	    if (ex instanceof NotRepresentableException) {
-	      intPt = new Coordinate(0, 0);
-	      isMitreWithinLimit = false;
-	    } else { throw ex }
-	  } finally {}
-	  if (isMitreWithinLimit) {
-	    this._segList.addPt(intPt);
-	  } else {
-	    this.addLimitedMitreJoin(offset0, offset1, distance, this._bufParams.getMitreLimit());
-	  }
-	};
-	OffsetSegmentGenerator.prototype.addFilletCorner = function addFilletCorner (p, p0, p1, direction, radius) {
-	  var dx0 = p0.x - p.x;
-	  var dy0 = p0.y - p.y;
-	  var startAngle = Math.atan2(dy0, dx0);
-	  var dx1 = p1.x - p.x;
-	  var dy1 = p1.y - p.y;
-	  var endAngle = Math.atan2(dy1, dx1);
-	  if (direction === CGAlgorithms.CLOCKWISE) {
-	    if (startAngle <= endAngle) { startAngle += 2.0 * Math.PI; }
-	  } else {
-	    if (startAngle >= endAngle) { startAngle -= 2.0 * Math.PI; }
-	  }
-	  this._segList.addPt(p0);
-	  this.addFilletArc(p, startAngle, endAngle, direction, radius);
-	  this._segList.addPt(p1);
-	};
-	OffsetSegmentGenerator.prototype.addOutsideTurn = function addOutsideTurn (orientation, addStartPoint) {
-	  if (this._offset0.p1.distance(this._offset1.p0) < this._distance * OffsetSegmentGenerator.OFFSET_SEGMENT_SEPARATION_FACTOR) {
-	    this._segList.addPt(this._offset0.p1);
-	    return null
-	  }
-	  if (this._bufParams.getJoinStyle() === BufferParameters.JOIN_MITRE) {
-	    this.addMitreJoin(this._s1, this._offset0, this._offset1, this._distance);
-	  } else if (this._bufParams.getJoinStyle() === BufferParameters.JOIN_BEVEL) {
-	    this.addBevelJoin(this._offset0, this._offset1);
-	  } else {
-	    if (addStartPoint) { this._segList.addPt(this._offset0.p1); }
-	    this.addFilletCorner(this._s1, this._offset0.p1, this._offset1.p0, orientation, this._distance);
-	    this._segList.addPt(this._offset1.p0);
-	  }
-	};
-	OffsetSegmentGenerator.prototype.createSquare = function createSquare (p) {
-	  this._segList.addPt(new Coordinate(p.x + this._distance, p.y + this._distance));
-	  this._segList.addPt(new Coordinate(p.x + this._distance, p.y - this._distance));
-	  this._segList.addPt(new Coordinate(p.x - this._distance, p.y - this._distance));
-	  this._segList.addPt(new Coordinate(p.x - this._distance, p.y + this._distance));
-	  this._segList.closeRing();
-	};
-	OffsetSegmentGenerator.prototype.addSegments = function addSegments (pt, isForward) {
-	  this._segList.addPts(pt, isForward);
-	};
-	OffsetSegmentGenerator.prototype.addFirstSegment = function addFirstSegment () {
-	  this._segList.addPt(this._offset1.p0);
-	};
-	OffsetSegmentGenerator.prototype.addLastSegment = function addLastSegment () {
-	  this._segList.addPt(this._offset1.p1);
-	};
-	OffsetSegmentGenerator.prototype.initSideSegments = function initSideSegments (s1, s2, side) {
-	  this._s1 = s1;
-	  this._s2 = s2;
-	  this._side = side;
-	  this._seg1.setCoordinates(s1, s2);
-	  this.computeOffsetSegment(this._seg1, side, this._distance, this._offset1);
-	};
-	OffsetSegmentGenerator.prototype.addLimitedMitreJoin = function addLimitedMitreJoin (offset0, offset1, distance, mitreLimit) {
-	  var basePt = this._seg0.p1;
-	  var ang0 = Angle.angle(basePt, this._seg0.p0);
-	  // const ang1 = Angle.angle(basePt, this._seg1.p1)
-	  var angDiff = Angle.angleBetweenOriented(this._seg0.p0, basePt, this._seg1.p1);
-	  var angDiffHalf = angDiff / 2;
-	  var midAng = Angle.normalize(ang0 + angDiffHalf);
-	  var mitreMidAng = Angle.normalize(midAng + Math.PI);
-	  var mitreDist = mitreLimit * distance;
-	  var bevelDelta = mitreDist * Math.abs(Math.sin(angDiffHalf));
-	  var bevelHalfLen = distance - bevelDelta;
-	  var bevelMidX = basePt.x + mitreDist * Math.cos(mitreMidAng);
-	  var bevelMidY = basePt.y + mitreDist * Math.sin(mitreMidAng);
-	  var bevelMidPt = new Coordinate(bevelMidX, bevelMidY);
-	  var mitreMidLine = new LineSegment(basePt, bevelMidPt);
-	  var bevelEndLeft = mitreMidLine.pointAlongOffset(1.0, bevelHalfLen);
-	  var bevelEndRight = mitreMidLine.pointAlongOffset(1.0, -bevelHalfLen);
-	  if (this._side === Position.LEFT) {
-	    this._segList.addPt(bevelEndLeft);
-	    this._segList.addPt(bevelEndRight);
-	  } else {
-	    this._segList.addPt(bevelEndRight);
-	    this._segList.addPt(bevelEndLeft);
-	  }
-	};
-	OffsetSegmentGenerator.prototype.computeOffsetSegment = function computeOffsetSegment (seg, side, distance, offset) {
-	  var sideSign = side === Position.LEFT ? 1 : -1;
-	  var dx = seg.p1.x - seg.p0.x;
-	  var dy = seg.p1.y - seg.p0.y;
-	  var len = Math.sqrt(dx * dx + dy * dy);
-	  var ux = sideSign * distance * dx / len;
-	  var uy = sideSign * distance * dy / len;
-	  offset.p0.x = seg.p0.x - uy;
-	  offset.p0.y = seg.p0.y + ux;
-	  offset.p1.x = seg.p1.x - uy;
-	  offset.p1.y = seg.p1.y + ux;
-	};
-	OffsetSegmentGenerator.prototype.addFilletArc = function addFilletArc (p, startAngle, endAngle, direction, radius) {
-	    var this$1 = this;
-
-	  var directionFactor = direction === CGAlgorithms.CLOCKWISE ? -1 : 1;
-	  var totalAngle = Math.abs(startAngle - endAngle);
-	  var nSegs = Math.trunc(totalAngle / this._filletAngleQuantum + 0.5);
-	  if (nSegs < 1) { return null }
-	  var initAngle = 0.0;
-	  var currAngleInc = totalAngle / nSegs;
-	  var currAngle = initAngle;
-	  var pt = new Coordinate();
-	  while (currAngle < totalAngle) {
-	    var angle = startAngle + directionFactor * currAngle;
-	    pt.x = p.x + radius * Math.cos(angle);
-	    pt.y = p.y + radius * Math.sin(angle);
-	    this$1._segList.addPt(pt);
-	    currAngle += currAngleInc;
-	  }
-	};
-	OffsetSegmentGenerator.prototype.addInsideTurn = function addInsideTurn (orientation, addStartPoint) {
-	  this._li.computeIntersection(this._offset0.p0, this._offset0.p1, this._offset1.p0, this._offset1.p1);
-	  if (this._li.hasIntersection()) {
-	    this._segList.addPt(this._li.getIntersection(0));
-	  } else {
-	    this._hasNarrowConcaveAngle = true;
-	    if (this._offset0.p1.distance(this._offset1.p0) < this._distance * OffsetSegmentGenerator.INSIDE_TURN_VERTEX_SNAP_DISTANCE_FACTOR) {
-	      this._segList.addPt(this._offset0.p1);
-	    } else {
-	      this._segList.addPt(this._offset0.p1);
-	      if (this._closingSegLengthFactor > 0) {
-	        var mid0 = new Coordinate((this._closingSegLengthFactor * this._offset0.p1.x + this._s1.x) / (this._closingSegLengthFactor + 1), (this._closingSegLengthFactor * this._offset0.p1.y + this._s1.y) / (this._closingSegLengthFactor + 1));
-	        this._segList.addPt(mid0);
-	        var mid1 = new Coordinate((this._closingSegLengthFactor * this._offset1.p0.x + this._s1.x) / (this._closingSegLengthFactor + 1), (this._closingSegLengthFactor * this._offset1.p0.y + this._s1.y) / (this._closingSegLengthFactor + 1));
-	        this._segList.addPt(mid1);
-	      } else {
-	        this._segList.addPt(this._s1);
-	      }
-	      this._segList.addPt(this._offset1.p0);
-	    }
-	  }
-	};
-	OffsetSegmentGenerator.prototype.createCircle = function createCircle (p) {
-	  var pt = new Coordinate(p.x + this._distance, p.y);
-	  this._segList.addPt(pt);
-	  this.addFilletArc(p, 0.0, 2.0 * Math.PI, -1, this._distance);
-	  this._segList.closeRing();
-	};
-	OffsetSegmentGenerator.prototype.addBevelJoin = function addBevelJoin (offset0, offset1) {
-	  this._segList.addPt(offset0.p1);
-	  this._segList.addPt(offset1.p0);
-	};
-	OffsetSegmentGenerator.prototype.init = function init (distance) {
-	  this._distance = distance;
-	  this._maxCurveSegmentError = distance * (1 - Math.cos(this._filletAngleQuantum / 2.0));
-	  this._segList = new OffsetSegmentString();
-	  this._segList.setPrecisionModel(this._precisionModel);
-	  this._segList.setMinimumVertexDistance(distance * OffsetSegmentGenerator.CURVE_VERTEX_SNAP_DISTANCE_FACTOR);
-	};
-	OffsetSegmentGenerator.prototype.addCollinear = function addCollinear (addStartPoint) {
-	  this._li.computeIntersection(this._s0, this._s1, this._s1, this._s2);
-	  var numInt = this._li.getIntersectionNum();
-	  if (numInt >= 2) {
-	    if (this._bufParams.getJoinStyle() === BufferParameters.JOIN_BEVEL || this._bufParams.getJoinStyle() === BufferParameters.JOIN_MITRE) {
-	      if (addStartPoint) { this._segList.addPt(this._offset0.p1); }
-	      this._segList.addPt(this._offset1.p0);
-	    } else {
-	      this.addFilletCorner(this._s1, this._offset0.p1, this._offset1.p0, CGAlgorithms.CLOCKWISE, this._distance);
-	    }
-	  }
-	};
-	OffsetSegmentGenerator.prototype.closeRing = function closeRing () {
-	  this._segList.closeRing();
-	};
-	OffsetSegmentGenerator.prototype.hasNarrowConcaveAngle = function hasNarrowConcaveAngle () {
-	  return this._hasNarrowConcaveAngle
-	};
-	OffsetSegmentGenerator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	OffsetSegmentGenerator.prototype.getClass = function getClass () {
-	  return OffsetSegmentGenerator
-	};
-	staticAccessors$27.OFFSET_SEGMENT_SEPARATION_FACTOR.get = function () { return 1.0E-3 };
-	staticAccessors$27.INSIDE_TURN_VERTEX_SNAP_DISTANCE_FACTOR.get = function () { return 1.0E-3 };
-	staticAccessors$27.CURVE_VERTEX_SNAP_DISTANCE_FACTOR.get = function () { return 1.0E-6 };
-	staticAccessors$27.MAX_CLOSING_SEG_LEN_FACTOR.get = function () { return 80 };
-
-	Object.defineProperties( OffsetSegmentGenerator, staticAccessors$27 );
-
-	var OffsetCurveBuilder = function OffsetCurveBuilder () {
-	  this._distance = 0.0;
-	  this._precisionModel = null;
-	  this._bufParams = null;
-	  var precisionModel = arguments[0];
-	  var bufParams = arguments[1];
-	  this._precisionModel = precisionModel;
-	  this._bufParams = bufParams;
-	};
-	OffsetCurveBuilder.prototype.getOffsetCurve = function getOffsetCurve (inputPts, distance) {
-	  this._distance = distance;
-	  if (distance === 0.0) { return null }
-	  var isRightSide = distance < 0.0;
-	  var posDistance = Math.abs(distance);
-	  var segGen = this.getSegGen(posDistance);
-	  if (inputPts.length <= 1) {
-	    this.computePointCurve(inputPts[0], segGen);
-	  } else {
-	    this.computeOffsetCurve(inputPts, isRightSide, segGen);
-	  }
-	  var curvePts = segGen.getCoordinates();
-	  if (isRightSide) { CoordinateArrays.reverse(curvePts); }
-	  return curvePts
-	};
-	OffsetCurveBuilder.prototype.computeSingleSidedBufferCurve = function computeSingleSidedBufferCurve (inputPts, isRightSide, segGen) {
-	  var distTol = this.simplifyTolerance(this._distance);
-	  if (isRightSide) {
-	    segGen.addSegments(inputPts, true);
-	    var simp2 = BufferInputLineSimplifier.simplify(inputPts, -distTol);
-	    var n2 = simp2.length - 1;
-	    segGen.initSideSegments(simp2[n2], simp2[n2 - 1], Position.LEFT);
-	    segGen.addFirstSegment();
-	    for (var i = n2 - 2; i >= 0; i--) {
-	      segGen.addNextSegment(simp2[i], true);
-	    }
-	  } else {
-	    segGen.addSegments(inputPts, false);
-	    var simp1 = BufferInputLineSimplifier.simplify(inputPts, distTol);
-	    var n1 = simp1.length - 1;
-	    segGen.initSideSegments(simp1[0], simp1[1], Position.LEFT);
-	    segGen.addFirstSegment();
-	    for (var i$1 = 2; i$1 <= n1; i$1++) {
-	      segGen.addNextSegment(simp1[i$1], true);
-	    }
-	  }
-	  segGen.addLastSegment();
-	  segGen.closeRing();
-	};
-	OffsetCurveBuilder.prototype.computeRingBufferCurve = function computeRingBufferCurve (inputPts, side, segGen) {
-	  var distTol = this.simplifyTolerance(this._distance);
-	  if (side === Position.RIGHT) { distTol = -distTol; }
-	  var simp = BufferInputLineSimplifier.simplify(inputPts, distTol);
-	  var n = simp.length - 1;
-	  segGen.initSideSegments(simp[n - 1], simp[0], side);
-	  for (var i = 1; i <= n; i++) {
-	    var addStartPoint = i !== 1;
-	    segGen.addNextSegment(simp[i], addStartPoint);
-	  }
-	  segGen.closeRing();
-	};
-	OffsetCurveBuilder.prototype.computeLineBufferCurve = function computeLineBufferCurve (inputPts, segGen) {
-	  var distTol = this.simplifyTolerance(this._distance);
-	  var simp1 = BufferInputLineSimplifier.simplify(inputPts, distTol);
-	  var n1 = simp1.length - 1;
-	  segGen.initSideSegments(simp1[0], simp1[1], Position.LEFT);
-	  for (var i = 2; i <= n1; i++) {
-	    segGen.addNextSegment(simp1[i], true);
-	  }
-	  segGen.addLastSegment();
-	  segGen.addLineEndCap(simp1[n1 - 1], simp1[n1]);
-	  var simp2 = BufferInputLineSimplifier.simplify(inputPts, -distTol);
-	  var n2 = simp2.length - 1;
-	  segGen.initSideSegments(simp2[n2], simp2[n2 - 1], Position.LEFT);
-	  for (var i$1 = n2 - 2; i$1 >= 0; i$1--) {
-	    segGen.addNextSegment(simp2[i$1], true);
-	  }
-	  segGen.addLastSegment();
-	  segGen.addLineEndCap(simp2[1], simp2[0]);
-	  segGen.closeRing();
-	};
-	OffsetCurveBuilder.prototype.computePointCurve = function computePointCurve (pt, segGen) {
-	  switch (this._bufParams.getEndCapStyle()) {
-	    case BufferParameters.CAP_ROUND:
-	      segGen.createCircle(pt);
-	      break
-	    case BufferParameters.CAP_SQUARE:
-	      segGen.createSquare(pt);
-	      break
-	  }
-	};
-	OffsetCurveBuilder.prototype.getLineCurve = function getLineCurve (inputPts, distance) {
-	  this._distance = distance;
-	  if (distance < 0.0 && !this._bufParams.isSingleSided()) { return null }
-	  if (distance === 0.0) { return null }
-	  var posDistance = Math.abs(distance);
-	  var segGen = this.getSegGen(posDistance);
-	  if (inputPts.length <= 1) {
-	    this.computePointCurve(inputPts[0], segGen);
-	  } else {
-	    if (this._bufParams.isSingleSided()) {
-	      var isRightSide = distance < 0.0;
-	      this.computeSingleSidedBufferCurve(inputPts, isRightSide, segGen);
-	    } else { this.computeLineBufferCurve(inputPts, segGen); }
-	  }
-	  var lineCoord = segGen.getCoordinates();
-	  return lineCoord
-	};
-	OffsetCurveBuilder.prototype.getBufferParameters = function getBufferParameters () {
-	  return this._bufParams
-	};
-	OffsetCurveBuilder.prototype.simplifyTolerance = function simplifyTolerance (bufDistance) {
-	  return bufDistance * this._bufParams.getSimplifyFactor()
-	};
-	OffsetCurveBuilder.prototype.getRingCurve = function getRingCurve (inputPts, side, distance) {
-	  this._distance = distance;
-	  if (inputPts.length <= 2) { return this.getLineCurve(inputPts, distance) }
-	  if (distance === 0.0) {
-	    return OffsetCurveBuilder.copyCoordinates(inputPts)
-	  }
-	  var segGen = this.getSegGen(distance);
-	  this.computeRingBufferCurve(inputPts, side, segGen);
-	  return segGen.getCoordinates()
-	};
-	OffsetCurveBuilder.prototype.computeOffsetCurve = function computeOffsetCurve (inputPts, isRightSide, segGen) {
-	  var distTol = this.simplifyTolerance(this._distance);
-	  if (isRightSide) {
-	    var simp2 = BufferInputLineSimplifier.simplify(inputPts, -distTol);
-	    var n2 = simp2.length - 1;
-	    segGen.initSideSegments(simp2[n2], simp2[n2 - 1], Position.LEFT);
-	    segGen.addFirstSegment();
-	    for (var i = n2 - 2; i >= 0; i--) {
-	      segGen.addNextSegment(simp2[i], true);
-	    }
-	  } else {
-	    var simp1 = BufferInputLineSimplifier.simplify(inputPts, distTol);
-	    var n1 = simp1.length - 1;
-	    segGen.initSideSegments(simp1[0], simp1[1], Position.LEFT);
-	    segGen.addFirstSegment();
-	    for (var i$1 = 2; i$1 <= n1; i$1++) {
-	      segGen.addNextSegment(simp1[i$1], true);
-	    }
-	  }
-	  segGen.addLastSegment();
-	};
-	OffsetCurveBuilder.prototype.getSegGen = function getSegGen (distance) {
-	  return new OffsetSegmentGenerator(this._precisionModel, this._bufParams, distance)
-	};
-	OffsetCurveBuilder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	OffsetCurveBuilder.prototype.getClass = function getClass () {
-	  return OffsetCurveBuilder
-	};
-	OffsetCurveBuilder.copyCoordinates = function copyCoordinates (pts) {
-	  var copy = new Array(pts.length).fill(null);
-	  for (var i = 0; i < copy.length; i++) {
-	    copy[i] = new Coordinate(pts[i]);
-	  }
-	  return copy
-	};
+	          hash = binb(ipad.concat(rstr2binb(data)), 1024 + data.length * 8);
+	          return binb2rstr(binb(opad.concat(hash), 1024 + 512));
+	        }
+	        /**
+	         * Calculate the SHA-512 of an array of big-endian dwords, and a bit length
+	         */
+
+
+	        function binb(x, len) {
+	          var j,
+	              i,
+	              l,
+	              W = new Array(80),
+	              hash = new Array(16),
+	              //Initial hash values
+	          H = [new int64(0x6a09e667, -205731576), new int64(-1150833019, -2067093701), new int64(0x3c6ef372, -23791573), new int64(-1521486534, 0x5f1d36f1), new int64(0x510e527f, -1377402159), new int64(-1694144372, 0x2b3e6c1f), new int64(0x1f83d9ab, -79577749), new int64(0x5be0cd19, 0x137e2179)],
+	              T1 = new int64(0, 0),
+	              T2 = new int64(0, 0),
+	              a = new int64(0, 0),
+	              b = new int64(0, 0),
+	              c = new int64(0, 0),
+	              d = new int64(0, 0),
+	              e = new int64(0, 0),
+	              f = new int64(0, 0),
+	              g = new int64(0, 0),
+	              h = new int64(0, 0),
+	              //Temporary variables not specified by the document
+	          s0 = new int64(0, 0),
+	              s1 = new int64(0, 0),
+	              Ch = new int64(0, 0),
+	              Maj = new int64(0, 0),
+	              r1 = new int64(0, 0),
+	              r2 = new int64(0, 0),
+	              r3 = new int64(0, 0);
+
+	          if (sha512_k === undefined) {
+	            //SHA512 constants
+	            sha512_k = [new int64(0x428a2f98, -685199838), new int64(0x71374491, 0x23ef65cd), new int64(-1245643825, -330482897), new int64(-373957723, -2121671748), new int64(0x3956c25b, -213338824), new int64(0x59f111f1, -1241133031), new int64(-1841331548, -1357295717), new int64(-1424204075, -630357736), new int64(-670586216, -1560083902), new int64(0x12835b01, 0x45706fbe), new int64(0x243185be, 0x4ee4b28c), new int64(0x550c7dc3, -704662302), new int64(0x72be5d74, -226784913), new int64(-2132889090, 0x3b1696b1), new int64(-1680079193, 0x25c71235), new int64(-1046744716, -815192428), new int64(-459576895, -1628353838), new int64(-272742522, 0x384f25e3), new int64(0xfc19dc6, -1953704523), new int64(0x240ca1cc, 0x77ac9c65), new int64(0x2de92c6f, 0x592b0275), new int64(0x4a7484aa, 0x6ea6e483), new int64(0x5cb0a9dc, -1119749164), new int64(0x76f988da, -2096016459), new int64(-1740746414, -295247957), new int64(-1473132947, 0x2db43210), new int64(-1341970488, -1728372417), new int64(-1084653625, -1091629340), new int64(-958395405, 0x3da88fc2), new int64(-710438585, -1828018395), new int64(0x6ca6351, -536640913), new int64(0x14292967, 0xa0e6e70), new int64(0x27b70a85, 0x46d22ffc), new int64(0x2e1b2138, 0x5c26c926), new int64(0x4d2c6dfc, 0x5ac42aed), new int64(0x53380d13, -1651133473), new int64(0x650a7354, -1951439906), new int64(0x766a0abb, 0x3c77b2a8), new int64(-2117940946, 0x47edaee6), new int64(-1838011259, 0x1482353b), new int64(-1564481375, 0x4cf10364), new int64(-1474664885, -1136513023), new int64(-1035236496, -789014639), new int64(-949202525, 0x654be30), new int64(-778901479, -688958952), new int64(-694614492, 0x5565a910), new int64(-200395387, 0x5771202a), new int64(0x106aa070, 0x32bbd1b8), new int64(0x19a4c116, -1194143544), new int64(0x1e376c08, 0x5141ab53), new int64(0x2748774c, -544281703), new int64(0x34b0bcb5, -509917016), new int64(0x391c0cb3, -976659869), new int64(0x4ed8aa4a, -482243893), new int64(0x5b9cca4f, 0x7763e373), new int64(0x682e6ff3, -692930397), new int64(0x748f82ee, 0x5defb2fc), new int64(0x78a5636f, 0x43172f60), new int64(-2067236844, -1578062990), new int64(-1933114872, 0x1a6439ec), new int64(-1866530822, 0x23631e28), new int64(-1538233109, -561857047), new int64(-1090935817, -1295615723), new int64(-965641998, -479046869), new int64(-903397682, -366583396), new int64(-779700025, 0x21c0c207), new int64(-354779690, -840897762), new int64(-176337025, -294727304), new int64(0x6f067aa, 0x72176fba), new int64(0xa637dc5, -1563912026), new int64(0x113f9804, -1090974290), new int64(0x1b710b35, 0x131c471b), new int64(0x28db77f5, 0x23047d84), new int64(0x32caab7b, 0x40c72493), new int64(0x3c9ebe0a, 0x15c9bebc), new int64(0x431d67c4, -1676669620), new int64(0x4cc5d4be, -885112138), new int64(0x597f299c, -60457430), new int64(0x5fcb6fab, 0x3ad6faec), new int64(0x6c44198c, 0x4a475817)];
+	          }
 
-	var SubgraphDepthLocater = function SubgraphDepthLocater () {
-	  this._subgraphs = null;
-	  this._seg = new LineSegment();
-	  this._cga = new CGAlgorithms();
-	  var subgraphs = arguments[0];
-	  this._subgraphs = subgraphs;
-	};
+	          for (i = 0; i < 80; i += 1) {
+	            W[i] = new int64(0, 0);
+	          } // append padding to the source string. The format is described in the FIPS.
+
+
+	          x[len >> 5] |= 0x80 << 24 - (len & 0x1f);
+	          x[(len + 128 >> 10 << 5) + 31] = len;
+	          l = x.length;
+
+	          for (i = 0; i < l; i += 32) {
+	            //32 dwords is the block size
+	            int64copy(a, H[0]);
+	            int64copy(b, H[1]);
+	            int64copy(c, H[2]);
+	            int64copy(d, H[3]);
+	            int64copy(e, H[4]);
+	            int64copy(f, H[5]);
+	            int64copy(g, H[6]);
+	            int64copy(h, H[7]);
+
+	            for (j = 0; j < 16; j += 1) {
+	              W[j].h = x[i + 2 * j];
+	              W[j].l = x[i + 2 * j + 1];
+	            }
+
+	            for (j = 16; j < 80; j += 1) {
+	              //sigma1
+	              int64rrot(r1, W[j - 2], 19);
+	              int64revrrot(r2, W[j - 2], 29);
+	              int64shr(r3, W[j - 2], 6);
+	              s1.l = r1.l ^ r2.l ^ r3.l;
+	              s1.h = r1.h ^ r2.h ^ r3.h; //sigma0
+
+	              int64rrot(r1, W[j - 15], 1);
+	              int64rrot(r2, W[j - 15], 8);
+	              int64shr(r3, W[j - 15], 7);
+	              s0.l = r1.l ^ r2.l ^ r3.l;
+	              s0.h = r1.h ^ r2.h ^ r3.h;
+	              int64add4(W[j], s1, W[j - 7], s0, W[j - 16]);
+	            }
+
+	            for (j = 0; j < 80; j += 1) {
+	              //Ch
+	              Ch.l = e.l & f.l ^ ~e.l & g.l;
+	              Ch.h = e.h & f.h ^ ~e.h & g.h; //Sigma1
+
+	              int64rrot(r1, e, 14);
+	              int64rrot(r2, e, 18);
+	              int64revrrot(r3, e, 9);
+	              s1.l = r1.l ^ r2.l ^ r3.l;
+	              s1.h = r1.h ^ r2.h ^ r3.h; //Sigma0
+
+	              int64rrot(r1, a, 28);
+	              int64revrrot(r2, a, 2);
+	              int64revrrot(r3, a, 7);
+	              s0.l = r1.l ^ r2.l ^ r3.l;
+	              s0.h = r1.h ^ r2.h ^ r3.h; //Maj
+
+	              Maj.l = a.l & b.l ^ a.l & c.l ^ b.l & c.l;
+	              Maj.h = a.h & b.h ^ a.h & c.h ^ b.h & c.h;
+	              int64add5(T1, h, s1, Ch, sha512_k[j], W[j]);
+	              int64add(T2, s0, Maj);
+	              int64copy(h, g);
+	              int64copy(g, f);
+	              int64copy(f, e);
+	              int64add(e, d, T1);
+	              int64copy(d, c);
+	              int64copy(c, b);
+	              int64copy(b, a);
+	              int64add(a, T1, T2);
+	            }
+
+	            int64add(H[0], H[0], a);
+	            int64add(H[1], H[1], b);
+	            int64add(H[2], H[2], c);
+	            int64add(H[3], H[3], d);
+	            int64add(H[4], H[4], e);
+	            int64add(H[5], H[5], f);
+	            int64add(H[6], H[6], g);
+	            int64add(H[7], H[7], h);
+	          } //represent the hash as an array of 32-bit dwords
+
+
+	          for (i = 0; i < 8; i += 1) {
+	            hash[2 * i] = H[i].h;
+	            hash[2 * i + 1] = H[i].l;
+	          }
 
-	var staticAccessors$30 = { DepthSegment: { configurable: true } };
-	SubgraphDepthLocater.prototype.findStabbedSegments = function findStabbedSegments () {
-	    var this$1 = this;
+	          return hash;
+	        } //A constructor for 64-bit numbers
 
-	  if (arguments.length === 1) {
-	    var stabbingRayLeftPt = arguments[0];
-	    var stabbedSegments = new ArrayList();
-	    for (var i = this._subgraphs.iterator(); i.hasNext();) {
-	      var bsg = i.next();
-	      var env = bsg.getEnvelope();
-	      if (stabbingRayLeftPt.y < env.getMinY() || stabbingRayLeftPt.y > env.getMaxY()) { continue }
-	      this$1.findStabbedSegments(stabbingRayLeftPt, bsg.getDirectedEdges(), stabbedSegments);
-	    }
-	    return stabbedSegments
-	  } else if (arguments.length === 3) {
-	    if (hasInterface(arguments[2], List) && (arguments[0] instanceof Coordinate && arguments[1] instanceof DirectedEdge)) {
-	      var stabbingRayLeftPt$1 = arguments[0];
-	      var dirEdge = arguments[1];
-	      var stabbedSegments$1 = arguments[2];
-	      var pts = dirEdge.getEdge().getCoordinates();
-	      for (var i$1 = 0; i$1 < pts.length - 1; i$1++) {
-	        this$1._seg.p0 = pts[i$1];
-	        this$1._seg.p1 = pts[i$1 + 1];
-	        if (this$1._seg.p0.y > this$1._seg.p1.y) { this$1._seg.reverse(); }
-	        var maxx = Math.max(this$1._seg.p0.x, this$1._seg.p1.x);
-	        if (maxx < stabbingRayLeftPt$1.x) { continue }
-	        if (this$1._seg.isHorizontal()) { continue }
-	        if (stabbingRayLeftPt$1.y < this$1._seg.p0.y || stabbingRayLeftPt$1.y > this$1._seg.p1.y) { continue }
-	        if (CGAlgorithms.computeOrientation(this$1._seg.p0, this$1._seg.p1, stabbingRayLeftPt$1) === CGAlgorithms.RIGHT) { continue }
-	        var depth = dirEdge.getDepth(Position.LEFT);
-	        if (!this$1._seg.p0.equals(pts[i$1])) { depth = dirEdge.getDepth(Position.RIGHT); }
-	        var ds = new DepthSegment(this$1._seg, depth);
-	        stabbedSegments$1.add(ds);
-	      }
-	    } else if (hasInterface(arguments[2], List) && (arguments[0] instanceof Coordinate && hasInterface(arguments[1], List))) {
-	      var stabbingRayLeftPt$2 = arguments[0];
-	      var dirEdges = arguments[1];
-	      var stabbedSegments$2 = arguments[2];
-	      for (var i$2 = dirEdges.iterator(); i$2.hasNext();) {
-	        var de = i$2.next();
-	        if (!de.isForward()) { continue }
-	        this$1.findStabbedSegments(stabbingRayLeftPt$2, de, stabbedSegments$2);
-	      }
-	    }
-	  }
-	};
-	SubgraphDepthLocater.prototype.getDepth = function getDepth (p) {
-	  var stabbedSegments = this.findStabbedSegments(p);
-	  if (stabbedSegments.size() === 0) { return 0 }
-	  var ds = Collections.min(stabbedSegments);
-	  return ds._leftDepth
-	};
-	SubgraphDepthLocater.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SubgraphDepthLocater.prototype.getClass = function getClass () {
-	  return SubgraphDepthLocater
-	};
-	staticAccessors$30.DepthSegment.get = function () { return DepthSegment };
 
-	Object.defineProperties( SubgraphDepthLocater, staticAccessors$30 );
+	        function int64(h, l) {
+	          this.h = h;
+	          this.l = l; //this.toString = int64toString;
+	        } //Copies src into dst, assuming both are 64-bit numbers
 
-	var DepthSegment = function DepthSegment () {
-	  this._upwardSeg = null;
-	  this._leftDepth = null;
-	  var seg = arguments[0];
-	  var depth = arguments[1];
-	  this._upwardSeg = new LineSegment(seg);
-	  this._leftDepth = depth;
-	};
-	DepthSegment.prototype.compareTo = function compareTo (obj) {
-	  var other = obj;
-	  if (this._upwardSeg.minX() >= other._upwardSeg.maxX()) { return 1 }
-	  if (this._upwardSeg.maxX() <= other._upwardSeg.minX()) { return -1 }
-	  var orientIndex = this._upwardSeg.orientationIndex(other._upwardSeg);
-	  if (orientIndex !== 0) { return orientIndex }
-	  orientIndex = -1 * other._upwardSeg.orientationIndex(this._upwardSeg);
-	  if (orientIndex !== 0) { return orientIndex }
-	  return this._upwardSeg.compareTo(other._upwardSeg)
-	};
-	DepthSegment.prototype.compareX = function compareX (seg0, seg1) {
-	  var compare0 = seg0.p0.compareTo(seg1.p0);
-	  if (compare0 !== 0) { return compare0 }
-	  return seg0.p1.compareTo(seg1.p1)
-	};
-	DepthSegment.prototype.toString = function toString () {
-	  return this._upwardSeg.toString()
-	};
-	DepthSegment.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable]
-	};
-	DepthSegment.prototype.getClass = function getClass () {
-	  return DepthSegment
-	};
 
-	var Triangle = function Triangle (p0, p1, p2) {
-	  this.p0 = p0 || null;
-	  this.p1 = p1 || null;
-	  this.p2 = p2 || null;
-	};
-	Triangle.prototype.area = function area () {
-	  return Triangle.area(this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.signedArea = function signedArea () {
-	  return Triangle.signedArea(this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.interpolateZ = function interpolateZ (p) {
-	  if (p === null) { throw new IllegalArgumentException('Supplied point is null.') }
-	  return Triangle.interpolateZ(p, this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.longestSideLength = function longestSideLength () {
-	  return Triangle.longestSideLength(this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.isAcute = function isAcute () {
-	  return Triangle.isAcute(this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.circumcentre = function circumcentre () {
-	  return Triangle.circumcentre(this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.area3D = function area3D () {
-	  return Triangle.area3D(this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.centroid = function centroid () {
-	  return Triangle.centroid(this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.inCentre = function inCentre () {
-	  return Triangle.inCentre(this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Triangle.prototype.getClass = function getClass () {
-	  return Triangle
-	};
-	Triangle.area = function area (a, b, c) {
-	  return Math.abs(((c.x - a.x) * (b.y - a.y) - (b.x - a.x) * (c.y - a.y)) / 2)
-	};
-	Triangle.signedArea = function signedArea (a, b, c) {
-	  return ((c.x - a.x) * (b.y - a.y) - (b.x - a.x) * (c.y - a.y)) / 2
-	};
-	Triangle.det = function det (m00, m01, m10, m11) {
-	  return m00 * m11 - m01 * m10
-	};
-	Triangle.interpolateZ = function interpolateZ (p, v0, v1, v2) {
-	  var x0 = v0.x;
-	  var y0 = v0.y;
-	  var a = v1.x - x0;
-	  var b = v2.x - x0;
-	  var c = v1.y - y0;
-	  var d = v2.y - y0;
-	  var det = a * d - b * c;
-	  var dx = p.x - x0;
-	  var dy = p.y - y0;
-	  var t = (d * dx - b * dy) / det;
-	  var u = (-c * dx + a * dy) / det;
-	  var z = v0.z + t * (v1.z - v0.z) + u * (v2.z - v0.z);
-	  return z
-	};
-	Triangle.longestSideLength = function longestSideLength (a, b, c) {
-	  var lenAB = a.distance(b);
-	  var lenBC = b.distance(c);
-	  var lenCA = c.distance(a);
-	  var maxLen = lenAB;
-	  if (lenBC > maxLen) { maxLen = lenBC; }
-	  if (lenCA > maxLen) { maxLen = lenCA; }
-	  return maxLen
-	};
-	Triangle.isAcute = function isAcute (a, b, c) {
-	  if (!Angle.isAcute(a, b, c)) { return false }
-	  if (!Angle.isAcute(b, c, a)) { return false }
-	  if (!Angle.isAcute(c, a, b)) { return false }
-	  return true
-	};
-	Triangle.circumcentre = function circumcentre (a, b, c) {
-	  var cx = c.x;
-	  var cy = c.y;
-	  var ax = a.x - cx;
-	  var ay = a.y - cy;
-	  var bx = b.x - cx;
-	  var by = b.y - cy;
-	  var denom = 2 * Triangle.det(ax, ay, bx, by);
-	  var numx = Triangle.det(ay, ax * ax + ay * ay, by, bx * bx + by * by);
-	  var numy = Triangle.det(ax, ax * ax + ay * ay, bx, bx * bx + by * by);
-	  var ccx = cx - numx / denom;
-	  var ccy = cy + numy / denom;
-	  return new Coordinate(ccx, ccy)
-	};
-	Triangle.perpendicularBisector = function perpendicularBisector (a, b) {
-	  var dx = b.x - a.x;
-	  var dy = b.y - a.y;
-	  var l1 = new HCoordinate(a.x + dx / 2.0, a.y + dy / 2.0, 1.0);
-	  var l2 = new HCoordinate(a.x - dy + dx / 2.0, a.y + dx + dy / 2.0, 1.0);
-	  return new HCoordinate(l1, l2)
-	};
-	Triangle.angleBisector = function angleBisector (a, b, c) {
-	  var len0 = b.distance(a);
-	  var len2 = b.distance(c);
-	  var frac = len0 / (len0 + len2);
-	  var dx = c.x - a.x;
-	  var dy = c.y - a.y;
-	  var splitPt = new Coordinate(a.x + frac * dx, a.y + frac * dy);
-	  return splitPt
-	};
-	Triangle.area3D = function area3D (a, b, c) {
-	  var ux = b.x - a.x;
-	  var uy = b.y - a.y;
-	  var uz = b.z - a.z;
-	  var vx = c.x - a.x;
-	  var vy = c.y - a.y;
-	  var vz = c.z - a.z;
-	  var crossx = uy * vz - uz * vy;
-	  var crossy = uz * vx - ux * vz;
-	  var crossz = ux * vy - uy * vx;
-	  var absSq = crossx * crossx + crossy * crossy + crossz * crossz;
-	  var area3D = Math.sqrt(absSq) / 2;
-	  return area3D
-	};
-	Triangle.centroid = function centroid (a, b, c) {
-	  var x = (a.x + b.x + c.x) / 3;
-	  var y = (a.y + b.y + c.y) / 3;
-	  return new Coordinate(x, y)
-	};
-	Triangle.inCentre = function inCentre (a, b, c) {
-	  var len0 = b.distance(c);
-	  var len1 = a.distance(c);
-	  var len2 = a.distance(b);
-	  var circum = len0 + len1 + len2;
-	  var inCentreX = (len0 * a.x + len1 * b.x + len2 * c.x) / circum;
-	  var inCentreY = (len0 * a.y + len1 * b.y + len2 * c.y) / circum;
-	  return new Coordinate(inCentreX, inCentreY)
-	};
+	        function int64copy(dst, src) {
+	          dst.h = src.h;
+	          dst.l = src.l;
+	        } //Right-rotates a 64-bit number by shift
+	        //Won't handle cases of shift>=32
+	        //The function revrrot() is for that
 
-	var OffsetCurveSetBuilder = function OffsetCurveSetBuilder () {
-	  this._inputGeom = null;
-	  this._distance = null;
-	  this._curveBuilder = null;
-	  this._curveList = new ArrayList();
-	  var inputGeom = arguments[0];
-	  var distance = arguments[1];
-	  var curveBuilder = arguments[2];
-	  this._inputGeom = inputGeom;
-	  this._distance = distance;
-	  this._curveBuilder = curveBuilder;
-	};
-	OffsetCurveSetBuilder.prototype.addPoint = function addPoint (p) {
-	  if (this._distance <= 0.0) { return null }
-	  var coord = p.getCoordinates();
-	  var curve = this._curveBuilder.getLineCurve(coord, this._distance);
-	  this.addCurve(curve, Location.EXTERIOR, Location.INTERIOR);
-	};
-	OffsetCurveSetBuilder.prototype.addPolygon = function addPolygon (p) {
-	    var this$1 = this;
-
-	  var offsetDistance = this._distance;
-	  var offsetSide = Position.LEFT;
-	  if (this._distance < 0.0) {
-	    offsetDistance = -this._distance;
-	    offsetSide = Position.RIGHT;
-	  }
-	  var shell = p.getExteriorRing();
-	  var shellCoord = CoordinateArrays.removeRepeatedPoints(shell.getCoordinates());
-	  if (this._distance < 0.0 && this.isErodedCompletely(shell, this._distance)) { return null }
-	  if (this._distance <= 0.0 && shellCoord.length < 3) { return null }
-	  this.addPolygonRing(shellCoord, offsetDistance, offsetSide, Location.EXTERIOR, Location.INTERIOR);
-	  for (var i = 0; i < p.getNumInteriorRing(); i++) {
-	    var hole = p.getInteriorRingN(i);
-	    var holeCoord = CoordinateArrays.removeRepeatedPoints(hole.getCoordinates());
-	    if (this$1._distance > 0.0 && this$1.isErodedCompletely(hole, -this$1._distance)) { continue }
-	    this$1.addPolygonRing(holeCoord, offsetDistance, Position.opposite(offsetSide), Location.INTERIOR, Location.EXTERIOR);
-	  }
-	};
-	OffsetCurveSetBuilder.prototype.isTriangleErodedCompletely = function isTriangleErodedCompletely (triangleCoord, bufferDistance) {
-	  var tri = new Triangle(triangleCoord[0], triangleCoord[1], triangleCoord[2]);
-	  var inCentre = tri.inCentre();
-	  var distToCentre = CGAlgorithms.distancePointLine(inCentre, tri.p0, tri.p1);
-	  return distToCentre < Math.abs(bufferDistance)
-	};
-	OffsetCurveSetBuilder.prototype.addLineString = function addLineString (line) {
-	  if (this._distance <= 0.0 && !this._curveBuilder.getBufferParameters().isSingleSided()) { return null }
-	  var coord = CoordinateArrays.removeRepeatedPoints(line.getCoordinates());
-	  var curve = this._curveBuilder.getLineCurve(coord, this._distance);
-	  this.addCurve(curve, Location.EXTERIOR, Location.INTERIOR);
-	};
-	OffsetCurveSetBuilder.prototype.addCurve = function addCurve (coord, leftLoc, rightLoc) {
-	  if (coord === null || coord.length < 2) { return null }
-	  var e = new NodedSegmentString(coord, new Label(0, Location.BOUNDARY, leftLoc, rightLoc));
-	  this._curveList.add(e);
-	};
-	OffsetCurveSetBuilder.prototype.getCurves = function getCurves () {
-	  this.add(this._inputGeom);
-	  return this._curveList
-	};
-	OffsetCurveSetBuilder.prototype.addPolygonRing = function addPolygonRing (coord, offsetDistance, side, cwLeftLoc, cwRightLoc) {
-	  if (offsetDistance === 0.0 && coord.length < LinearRing.MINIMUM_VALID_SIZE) { return null }
-	  var leftLoc = cwLeftLoc;
-	  var rightLoc = cwRightLoc;
-	  if (coord.length >= LinearRing.MINIMUM_VALID_SIZE && CGAlgorithms.isCCW(coord)) {
-	    leftLoc = cwRightLoc;
-	    rightLoc = cwLeftLoc;
-	    side = Position.opposite(side);
-	  }
-	  var curve = this._curveBuilder.getRingCurve(coord, side, offsetDistance);
-	  this.addCurve(curve, leftLoc, rightLoc);
-	};
-	OffsetCurveSetBuilder.prototype.add = function add (g) {
-	  if (g.isEmpty()) { return null }
-	  if (g instanceof Polygon) { this.addPolygon(g); }
-	  else if (g instanceof LineString) { this.addLineString(g); }
-	  else if (g instanceof Point$1) { this.addPoint(g); }
-	  else if (g instanceof MultiPoint) { this.addCollection(g); }
-	  else if (g instanceof MultiLineString) { this.addCollection(g); }
-	  else if (g instanceof MultiPolygon) { this.addCollection(g); }
-	  else if (g instanceof GeometryCollection) { this.addCollection(g); }
-	  // else throw new UnsupportedOperationException(g.getClass().getName())
-	};
-	OffsetCurveSetBuilder.prototype.isErodedCompletely = function isErodedCompletely (ring, bufferDistance) {
-	  var ringCoord = ring.getCoordinates();
-	  // const minDiam = 0.0
-	  if (ringCoord.length < 4) { return bufferDistance < 0 }
-	  if (ringCoord.length === 4) { return this.isTriangleErodedCompletely(ringCoord, bufferDistance) }
-	  var env = ring.getEnvelopeInternal();
-	  var envMinDimension = Math.min(env.getHeight(), env.getWidth());
-	  if (bufferDistance < 0.0 && 2 * Math.abs(bufferDistance) > envMinDimension) { return true }
-	  return false
-	};
-	OffsetCurveSetBuilder.prototype.addCollection = function addCollection (gc) {
-	    var this$1 = this;
 
-	  for (var i = 0; i < gc.getNumGeometries(); i++) {
-	    var g = gc.getGeometryN(i);
-	    this$1.add(g);
-	  }
-	};
-	OffsetCurveSetBuilder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	OffsetCurveSetBuilder.prototype.getClass = function getClass () {
-	  return OffsetCurveSetBuilder
-	};
+	        function int64rrot(dst, x, shift) {
+	          dst.l = x.l >>> shift | x.h << 32 - shift;
+	          dst.h = x.h >>> shift | x.l << 32 - shift;
+	        } //Reverses the dwords of the source and then rotates right by shift.
+	        //This is equivalent to rotation by 32+shift
 
-	var PointOnGeometryLocator = function PointOnGeometryLocator () {};
 
-	PointOnGeometryLocator.prototype.locate = function locate (p) {};
-	PointOnGeometryLocator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	PointOnGeometryLocator.prototype.getClass = function getClass () {
-	  return PointOnGeometryLocator
-	};
+	        function int64revrrot(dst, x, shift) {
+	          dst.l = x.h >>> shift | x.l << 32 - shift;
+	          dst.h = x.l >>> shift | x.h << 32 - shift;
+	        } //Bitwise-shifts right a 64-bit number by shift
+	        //Won't handle shift>=32, but it's never needed in SHA512
 
-	var GeometryCollectionIterator = function GeometryCollectionIterator () {
-	  this._parent = null;
-	  this._atStart = null;
-	  this._max = null;
-	  this._index = null;
-	  this._subcollectionIterator = null;
-	  var parent = arguments[0];
-	  this._parent = parent;
-	  this._atStart = true;
-	  this._index = 0;
-	  this._max = parent.getNumGeometries();
-	};
-	GeometryCollectionIterator.prototype.next = function next () {
-	  if (this._atStart) {
-	    this._atStart = false;
-	    if (GeometryCollectionIterator.isAtomic(this._parent)) { this._index++; }
-	    return this._parent
-	  }
-	  if (this._subcollectionIterator !== null) {
-	    if (this._subcollectionIterator.hasNext()) {
-	      return this._subcollectionIterator.next()
-	    } else {
-	      this._subcollectionIterator = null;
-	    }
-	  }
-	  if (this._index >= this._max) {
-	    throw new NoSuchElementException()
-	  }
-	  var obj = this._parent.getGeometryN(this._index++);
-	  if (obj instanceof GeometryCollection) {
-	    this._subcollectionIterator = new GeometryCollectionIterator(obj);
-	    return this._subcollectionIterator.next()
-	  }
-	  return obj
-	};
-	GeometryCollectionIterator.prototype.remove = function remove () {
-	  throw new Error(this.getClass().getName())
-	};
-	GeometryCollectionIterator.prototype.hasNext = function hasNext () {
-	  if (this._atStart) {
-	    return true
-	  }
-	  if (this._subcollectionIterator !== null) {
-	    if (this._subcollectionIterator.hasNext()) {
-	      return true
-	    }
-	    this._subcollectionIterator = null;
-	  }
-	  if (this._index >= this._max) {
-	    return false
-	  }
-	  return true
-	};
-	GeometryCollectionIterator.prototype.interfaces_ = function interfaces_ () {
-	  return [Iterator$1]
-	};
-	GeometryCollectionIterator.prototype.getClass = function getClass () {
-	  return GeometryCollectionIterator
-	};
-	GeometryCollectionIterator.isAtomic = function isAtomic (geom) {
-	  return !(geom instanceof GeometryCollection)
-	};
 
-	var SimplePointInAreaLocator = function SimplePointInAreaLocator () {
-	  this._geom = null;
-	  var geom = arguments[0];
-	  this._geom = geom;
-	};
-	SimplePointInAreaLocator.prototype.locate = function locate (p) {
-	  return SimplePointInAreaLocator.locate(p, this._geom)
-	};
-	SimplePointInAreaLocator.prototype.interfaces_ = function interfaces_ () {
-	  return [PointOnGeometryLocator]
-	};
-	SimplePointInAreaLocator.prototype.getClass = function getClass () {
-	  return SimplePointInAreaLocator
-	};
-	SimplePointInAreaLocator.isPointInRing = function isPointInRing (p, ring) {
-	  if (!ring.getEnvelopeInternal().intersects(p)) { return false }
-	  return CGAlgorithms.isPointInRing(p, ring.getCoordinates())
-	};
-	SimplePointInAreaLocator.containsPointInPolygon = function containsPointInPolygon (p, poly) {
-	  if (poly.isEmpty()) { return false }
-	  var shell = poly.getExteriorRing();
-	  if (!SimplePointInAreaLocator.isPointInRing(p, shell)) { return false }
-	  for (var i = 0; i < poly.getNumInteriorRing(); i++) {
-	    var hole = poly.getInteriorRingN(i);
-	    if (SimplePointInAreaLocator.isPointInRing(p, hole)) { return false }
-	  }
-	  return true
-	};
-	SimplePointInAreaLocator.containsPoint = function containsPoint (p, geom) {
-	  if (geom instanceof Polygon) {
-	    return SimplePointInAreaLocator.containsPointInPolygon(p, geom)
-	  } else if (geom instanceof GeometryCollection) {
-	    var geomi = new GeometryCollectionIterator(geom);
-	    while (geomi.hasNext()) {
-	      var g2 = geomi.next();
-	      if (g2 !== geom) { if (SimplePointInAreaLocator.containsPoint(p, g2)) { return true } }
-	    }
-	  }
-	  return false
-	};
-	SimplePointInAreaLocator.locate = function locate (p, geom) {
-	  if (geom.isEmpty()) { return Location.EXTERIOR }
-	  if (SimplePointInAreaLocator.containsPoint(p, geom)) { return Location.INTERIOR }
-	  return Location.EXTERIOR
-	};
+	        function int64shr(dst, x, shift) {
+	          dst.l = x.l >>> shift | x.h << 32 - shift;
+	          dst.h = x.h >>> shift;
+	        } //Adds two 64-bit numbers
+	        //Like the original implementation, does not rely on 32-bit operations
 
-	var EdgeEndStar = function EdgeEndStar () {
-	  this._edgeMap = new TreeMap();
-	  this._edgeList = null;
-	  this._ptInAreaLocation = [Location.NONE, Location.NONE];
-	};
-	EdgeEndStar.prototype.getNextCW = function getNextCW (ee) {
-	  this.getEdges();
-	  var i = this._edgeList.indexOf(ee);
-	  var iNextCW = i - 1;
-	  if (i === 0) { iNextCW = this._edgeList.size() - 1; }
-	  return this._edgeList.get(iNextCW)
-	};
-	EdgeEndStar.prototype.propagateSideLabels = function propagateSideLabels (geomIndex) {
-	  var startLoc = Location.NONE;
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var e = it.next();
-	    var label = e.getLabel();
-	    if (label.isArea(geomIndex) && label.getLocation(geomIndex, Position.LEFT) !== Location.NONE) { startLoc = label.getLocation(geomIndex, Position.LEFT); }
-	  }
-	  if (startLoc === Location.NONE) { return null }
-	  var currLoc = startLoc;
-	  for (var it$1 = this.iterator(); it$1.hasNext();) {
-	    var e$1 = it$1.next();
-	    var label$1 = e$1.getLabel();
-	    if (label$1.getLocation(geomIndex, Position.ON) === Location.NONE) { label$1.setLocation(geomIndex, Position.ON, currLoc); }
-	    if (label$1.isArea(geomIndex)) {
-	      var leftLoc = label$1.getLocation(geomIndex, Position.LEFT);
-	      var rightLoc = label$1.getLocation(geomIndex, Position.RIGHT);
-	      if (rightLoc !== Location.NONE) {
-	        if (rightLoc !== currLoc) { throw new TopologyException('side location conflict', e$1.getCoordinate()) }
-	        if (leftLoc === Location.NONE) {
-	          Assert.shouldNeverReachHere('found single null side (at ' + e$1.getCoordinate() + ')');
-	        }
-	        currLoc = leftLoc;
-	      } else {
-	        Assert.isTrue(label$1.getLocation(geomIndex, Position.LEFT) === Location.NONE, 'found single null side');
-	        label$1.setLocation(geomIndex, Position.RIGHT, currLoc);
-	        label$1.setLocation(geomIndex, Position.LEFT, currLoc);
-	      }
-	    }
-	  }
-	};
-	EdgeEndStar.prototype.getCoordinate = function getCoordinate () {
-	  var it = this.iterator();
-	  if (!it.hasNext()) { return null }
-	  var e = it.next();
-	  return e.getCoordinate()
-	};
-	EdgeEndStar.prototype.print = function print (out) {
-	  System.out.println('EdgeEndStar:   ' + this.getCoordinate());
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var e = it.next();
-	    e.print(out);
-	  }
-	};
-	EdgeEndStar.prototype.isAreaLabelsConsistent = function isAreaLabelsConsistent (geomGraph) {
-	  this.computeEdgeEndLabels(geomGraph.getBoundaryNodeRule());
-	  return this.checkAreaLabelsConsistent(0)
-	};
-	EdgeEndStar.prototype.checkAreaLabelsConsistent = function checkAreaLabelsConsistent (geomIndex) {
-	  var edges = this.getEdges();
-	  if (edges.size() <= 0) { return true }
-	  var lastEdgeIndex = edges.size() - 1;
-	  var startLabel = edges.get(lastEdgeIndex).getLabel();
-	  var startLoc = startLabel.getLocation(geomIndex, Position.LEFT);
-	  Assert.isTrue(startLoc !== Location.NONE, 'Found unlabelled area edge');
-	  var currLoc = startLoc;
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var e = it.next();
-	    var label = e.getLabel();
-	    Assert.isTrue(label.isArea(geomIndex), 'Found non-area edge');
-	    var leftLoc = label.getLocation(geomIndex, Position.LEFT);
-	    var rightLoc = label.getLocation(geomIndex, Position.RIGHT);
-	    if (leftLoc === rightLoc) {
-	      return false
-	    }
-	    if (rightLoc !== currLoc) {
-	      return false
-	    }
-	    currLoc = leftLoc;
-	  }
-	  return true
-	};
-	EdgeEndStar.prototype.findIndex = function findIndex (eSearch) {
-	    var this$1 = this;
 
-	  this.iterator();
-	  for (var i = 0; i < this._edgeList.size(); i++) {
-	    var e = this$1._edgeList.get(i);
-	    if (e === eSearch) { return i }
-	  }
-	  return -1
-	};
-	EdgeEndStar.prototype.iterator = function iterator () {
-	  return this.getEdges().iterator()
-	};
-	EdgeEndStar.prototype.getEdges = function getEdges () {
-	  if (this._edgeList === null) {
-	    this._edgeList = new ArrayList(this._edgeMap.values());
-	  }
-	  return this._edgeList
-	};
-	EdgeEndStar.prototype.getLocation = function getLocation (geomIndex, p, geom) {
-	  if (this._ptInAreaLocation[geomIndex] === Location.NONE) {
-	    this._ptInAreaLocation[geomIndex] = SimplePointInAreaLocator.locate(p, geom[geomIndex].getGeometry());
-	  }
-	  return this._ptInAreaLocation[geomIndex]
-	};
-	EdgeEndStar.prototype.toString = function toString () {
-	  var buf = new StringBuffer();
-	  buf.append('EdgeEndStar:   ' + this.getCoordinate());
-	  buf.append('\n');
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var e = it.next();
-	    buf.append(e);
-	    buf.append('\n');
-	  }
-	  return buf.toString()
-	};
-	EdgeEndStar.prototype.computeEdgeEndLabels = function computeEdgeEndLabels (boundaryNodeRule) {
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var ee = it.next();
-	    ee.computeLabel(boundaryNodeRule);
-	  }
-	};
-	EdgeEndStar.prototype.computeLabelling = function computeLabelling (geomGraph) {
-	    var this$1 = this;
-
-	  this.computeEdgeEndLabels(geomGraph[0].getBoundaryNodeRule());
-	  this.propagateSideLabels(0);
-	  this.propagateSideLabels(1);
-	  var hasDimensionalCollapseEdge = [false, false];
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var e = it.next();
-	    var label = e.getLabel();
-	    for (var geomi = 0; geomi < 2; geomi++) {
-	      if (label.isLine(geomi) && label.getLocation(geomi) === Location.BOUNDARY) { hasDimensionalCollapseEdge[geomi] = true; }
-	    }
-	  }
-	  for (var it$1 = this.iterator(); it$1.hasNext();) {
-	    var e$1 = it$1.next();
-	    var label$1 = e$1.getLabel();
-	    for (var geomi$1 = 0; geomi$1 < 2; geomi$1++) {
-	      if (label$1.isAnyNull(geomi$1)) {
-	        var loc = Location.NONE;
-	        if (hasDimensionalCollapseEdge[geomi$1]) {
-	          loc = Location.EXTERIOR;
-	        } else {
-	          var p = e$1.getCoordinate();
-	          loc = this$1.getLocation(geomi$1, p, geomGraph);
-	        }
-	        label$1.setAllLocationsIfNull(geomi$1, loc);
-	      }
-	    }
-	  }
-	};
-	EdgeEndStar.prototype.getDegree = function getDegree () {
-	  return this._edgeMap.size()
-	};
-	EdgeEndStar.prototype.insertEdgeEnd = function insertEdgeEnd (e, obj) {
-	  this._edgeMap.put(e, obj);
-	  this._edgeList = null;
-	};
-	EdgeEndStar.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	EdgeEndStar.prototype.getClass = function getClass () {
-	  return EdgeEndStar
-	};
+	        function int64add(dst, x, y) {
+	          var w0 = (x.l & 0xffff) + (y.l & 0xffff);
+	          var w1 = (x.l >>> 16) + (y.l >>> 16) + (w0 >>> 16);
+	          var w2 = (x.h & 0xffff) + (y.h & 0xffff) + (w1 >>> 16);
+	          var w3 = (x.h >>> 16) + (y.h >>> 16) + (w2 >>> 16);
+	          dst.l = w0 & 0xffff | w1 << 16;
+	          dst.h = w2 & 0xffff | w3 << 16;
+	        } //Same, except with 4 addends. Works faster than adding them one by one.
 
-	var DirectedEdgeStar = (function (EdgeEndStar$$1) {
-	  function DirectedEdgeStar () {
-	    EdgeEndStar$$1.call(this);
-	    this._resultAreaEdgeList = null;
-	    this._label = null;
-	    this._SCANNING_FOR_INCOMING = 1;
-	    this._LINKING_TO_OUTGOING = 2;
-	  }
-
-	  if ( EdgeEndStar$$1 ) { DirectedEdgeStar.__proto__ = EdgeEndStar$$1; }
-	  DirectedEdgeStar.prototype = Object.create( EdgeEndStar$$1 && EdgeEndStar$$1.prototype );
-	  DirectedEdgeStar.prototype.constructor = DirectedEdgeStar;
-	  DirectedEdgeStar.prototype.linkResultDirectedEdges = function linkResultDirectedEdges () {
-	    var this$1 = this;
-
-	    this.getResultAreaEdges();
-	    var firstOut = null;
-	    var incoming = null;
-	    var state = this._SCANNING_FOR_INCOMING;
-	    for (var i = 0; i < this._resultAreaEdgeList.size(); i++) {
-	      var nextOut = this$1._resultAreaEdgeList.get(i);
-	      var nextIn = nextOut.getSym();
-	      if (!nextOut.getLabel().isArea()) { continue }
-	      if (firstOut === null && nextOut.isInResult()) { firstOut = nextOut; }
-	      switch (state) {
-	        case this$1._SCANNING_FOR_INCOMING:
-	          if (!nextIn.isInResult()) { continue }
-	          incoming = nextIn;
-	          state = this$1._LINKING_TO_OUTGOING;
-	          break
-	        case this$1._LINKING_TO_OUTGOING:
-	          if (!nextOut.isInResult()) { continue }
-	          incoming.setNext(nextOut);
-	          state = this$1._SCANNING_FOR_INCOMING;
-	          break
-	      }
-	    }
-	    if (state === this._LINKING_TO_OUTGOING) {
-	      if (firstOut === null) { throw new TopologyException('no outgoing dirEdge found', this.getCoordinate()) }
-	      Assert.isTrue(firstOut.isInResult(), 'unable to link last incoming dirEdge');
-	      incoming.setNext(firstOut);
-	    }
-	  };
-	  DirectedEdgeStar.prototype.insert = function insert (ee) {
-	    var de = ee;
-	    this.insertEdgeEnd(de, de);
-	  };
-	  DirectedEdgeStar.prototype.getRightmostEdge = function getRightmostEdge () {
-	    var edges = this.getEdges();
-	    var size = edges.size();
-	    if (size < 1) { return null }
-	    var de0 = edges.get(0);
-	    if (size === 1) { return de0 }
-	    var deLast = edges.get(size - 1);
-	    var quad0 = de0.getQuadrant();
-	    var quad1 = deLast.getQuadrant();
-	    if (Quadrant.isNorthern(quad0) && Quadrant.isNorthern(quad1)) { return de0; } else if (!Quadrant.isNorthern(quad0) && !Quadrant.isNorthern(quad1)) { return deLast; } else {
-	      // const nonHorizontalEdge = null
-	      if (de0.getDy() !== 0) { return de0; } else if (deLast.getDy() !== 0) { return deLast }
-	    }
-	    Assert.shouldNeverReachHere('found two horizontal edges incident on node');
-	    return null
-	  };
-	  DirectedEdgeStar.prototype.print = function print (out) {
-	    System.out.println('DirectedEdgeStar: ' + this.getCoordinate());
-	    for (var it = this.iterator(); it.hasNext();) {
-	      var de = it.next();
-	      out.print('out ');
-	      de.print(out);
-	      out.println();
-	      out.print('in ');
-	      de.getSym().print(out);
-	      out.println();
-	    }
-	  };
-	  DirectedEdgeStar.prototype.getResultAreaEdges = function getResultAreaEdges () {
-	    var this$1 = this;
-
-	    if (this._resultAreaEdgeList !== null) { return this._resultAreaEdgeList }
-	    this._resultAreaEdgeList = new ArrayList();
-	    for (var it = this.iterator(); it.hasNext();) {
-	      var de = it.next();
-	      if (de.isInResult() || de.getSym().isInResult()) { this$1._resultAreaEdgeList.add(de); }
-	    }
-	    return this._resultAreaEdgeList
-	  };
-	  DirectedEdgeStar.prototype.updateLabelling = function updateLabelling (nodeLabel) {
-	    for (var it = this.iterator(); it.hasNext();) {
-	      var de = it.next();
-	      var label = de.getLabel();
-	      label.setAllLocationsIfNull(0, nodeLabel.getLocation(0));
-	      label.setAllLocationsIfNull(1, nodeLabel.getLocation(1));
-	    }
-	  };
-	  DirectedEdgeStar.prototype.linkAllDirectedEdges = function linkAllDirectedEdges () {
-	    var this$1 = this;
-
-	    this.getEdges();
-	    var prevOut = null;
-	    var firstIn = null;
-	    for (var i = this._edgeList.size() - 1; i >= 0; i--) {
-	      var nextOut = this$1._edgeList.get(i);
-	      var nextIn = nextOut.getSym();
-	      if (firstIn === null) { firstIn = nextIn; }
-	      if (prevOut !== null) { nextIn.setNext(prevOut); }
-	      prevOut = nextOut;
-	    }
-	    firstIn.setNext(prevOut);
-	  };
-	  DirectedEdgeStar.prototype.computeDepths = function computeDepths () {
-	    var this$1 = this;
-
-	    if (arguments.length === 1) {
-	      var de = arguments[0];
-	      var edgeIndex = this.findIndex(de);
-	      // const label = de.getLabel()
-	      var startDepth = de.getDepth(Position.LEFT);
-	      var targetLastDepth = de.getDepth(Position.RIGHT);
-	      var nextDepth = this.computeDepths(edgeIndex + 1, this._edgeList.size(), startDepth);
-	      var lastDepth = this.computeDepths(0, edgeIndex, nextDepth);
-	      if (lastDepth !== targetLastDepth) { throw new TopologyException('depth mismatch at ' + de.getCoordinate()) }
-	    } else if (arguments.length === 3) {
-	      var startIndex = arguments[0];
-	      var endIndex = arguments[1];
-	      var startDepth$1 = arguments[2];
-	      var currDepth = startDepth$1;
-	      for (var i = startIndex; i < endIndex; i++) {
-	        var nextDe = this$1._edgeList.get(i);
-	        // const label = nextDe.getLabel()
-	        nextDe.setEdgeDepths(Position.RIGHT, currDepth);
-	        currDepth = nextDe.getDepth(Position.LEFT);
-	      }
-	      return currDepth
-	    }
-	  };
-	  DirectedEdgeStar.prototype.mergeSymLabels = function mergeSymLabels () {
-	    for (var it = this.iterator(); it.hasNext();) {
-	      var de = it.next();
-	      var label = de.getLabel();
-	      label.merge(de.getSym().getLabel());
-	    }
-	  };
-	  DirectedEdgeStar.prototype.linkMinimalDirectedEdges = function linkMinimalDirectedEdges (er) {
-	    var this$1 = this;
-
-	    var firstOut = null;
-	    var incoming = null;
-	    var state = this._SCANNING_FOR_INCOMING;
-	    for (var i = this._resultAreaEdgeList.size() - 1; i >= 0; i--) {
-	      var nextOut = this$1._resultAreaEdgeList.get(i);
-	      var nextIn = nextOut.getSym();
-	      if (firstOut === null && nextOut.getEdgeRing() === er) { firstOut = nextOut; }
-	      switch (state) {
-	        case this$1._SCANNING_FOR_INCOMING:
-	          if (nextIn.getEdgeRing() !== er) { continue }
-	          incoming = nextIn;
-	          state = this$1._LINKING_TO_OUTGOING;
-	          break
-	        case this$1._LINKING_TO_OUTGOING:
-	          if (nextOut.getEdgeRing() !== er) { continue }
-	          incoming.setNextMin(nextOut);
-	          state = this$1._SCANNING_FOR_INCOMING;
-	          break
-	      }
-	    }
-	    if (state === this._LINKING_TO_OUTGOING) {
-	      Assert.isTrue(firstOut !== null, 'found null for first outgoing dirEdge');
-	      Assert.isTrue(firstOut.getEdgeRing() === er, 'unable to link last incoming dirEdge');
-	      incoming.setNextMin(firstOut);
-	    }
-	  };
-	  DirectedEdgeStar.prototype.getOutgoingDegree = function getOutgoingDegree () {
-	    if (arguments.length === 0) {
-	      var degree = 0;
-	      for (var it = this.iterator(); it.hasNext();) {
-	        var de = it.next();
-	        if (de.isInResult()) { degree++; }
-	      }
-	      return degree
-	    } else if (arguments.length === 1) {
-	      var er = arguments[0];
-	      var degree$1 = 0;
-	      for (var it$1 = this.iterator(); it$1.hasNext();) {
-	        var de$1 = it$1.next();
-	        if (de$1.getEdgeRing() === er) { degree$1++; }
-	      }
-	      return degree$1
-	    }
-	  };
-	  DirectedEdgeStar.prototype.getLabel = function getLabel () {
-	    return this._label
-	  };
-	  DirectedEdgeStar.prototype.findCoveredLineEdges = function findCoveredLineEdges () {
-	    var startLoc = Location.NONE;
-	    for (var it = this.iterator(); it.hasNext();) {
-	      var nextOut = it.next();
-	      var nextIn = nextOut.getSym();
-	      if (!nextOut.isLineEdge()) {
-	        if (nextOut.isInResult()) {
-	          startLoc = Location.INTERIOR;
-	          break
-	        }
-	        if (nextIn.isInResult()) {
-	          startLoc = Location.EXTERIOR;
-	          break
-	        }
-	      }
-	    }
-	    if (startLoc === Location.NONE) { return null }
-	    var currLoc = startLoc;
-	    for (var it$1 = this.iterator(); it$1.hasNext();) {
-	      var nextOut$1 = it$1.next();
-	      var nextIn$1 = nextOut$1.getSym();
-	      if (nextOut$1.isLineEdge()) {
-	        nextOut$1.getEdge().setCovered(currLoc === Location.INTERIOR);
-	      } else {
-	        if (nextOut$1.isInResult()) { currLoc = Location.EXTERIOR; }
-	        if (nextIn$1.isInResult()) { currLoc = Location.INTERIOR; }
-	      }
-	    }
-	  };
-	  DirectedEdgeStar.prototype.computeLabelling = function computeLabelling (geom) {
-	    var this$1 = this;
 
-	    EdgeEndStar$$1.prototype.computeLabelling.call(this, geom);
-	    this._label = new Label(Location.NONE);
-	    for (var it = this.iterator(); it.hasNext();) {
-	      var ee = it.next();
-	      var e = ee.getEdge();
-	      var eLabel = e.getLabel();
-	      for (var i = 0; i < 2; i++) {
-	        var eLoc = eLabel.getLocation(i);
-	        if (eLoc === Location.INTERIOR || eLoc === Location.BOUNDARY) { this$1._label.setLocation(i, Location.INTERIOR); }
-	      }
-	    }
-	  };
-	  DirectedEdgeStar.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  DirectedEdgeStar.prototype.getClass = function getClass () {
-	    return DirectedEdgeStar
-	  };
+	        function int64add4(dst, a, b, c, d) {
+	          var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff);
+	          var w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (w0 >>> 16);
+	          var w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (w1 >>> 16);
+	          var w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (w2 >>> 16);
+	          dst.l = w0 & 0xffff | w1 << 16;
+	          dst.h = w2 & 0xffff | w3 << 16;
+	        } //Same, except with 5 addends
 
-	  return DirectedEdgeStar;
-	}(EdgeEndStar));
 
-	var OverlayNodeFactory = (function (NodeFactory$$1) {
-	  function OverlayNodeFactory () {
-	    NodeFactory$$1.apply(this, arguments);
-	  }
+	        function int64add5(dst, a, b, c, d, e) {
+	          var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff) + (e.l & 0xffff),
+	              w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (e.l >>> 16) + (w0 >>> 16),
+	              w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (e.h & 0xffff) + (w1 >>> 16),
+	              w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (e.h >>> 16) + (w2 >>> 16);
+	          dst.l = w0 & 0xffff | w1 << 16;
+	          dst.h = w2 & 0xffff | w3 << 16;
+	        }
+	      },
 
-	  if ( NodeFactory$$1 ) { OverlayNodeFactory.__proto__ = NodeFactory$$1; }
-	  OverlayNodeFactory.prototype = Object.create( NodeFactory$$1 && NodeFactory$$1.prototype );
-	  OverlayNodeFactory.prototype.constructor = OverlayNodeFactory;
+	      /**
+	       * @class Hashes.RMD160
+	       * @constructor
+	       * @param {Object} [config]
+	       *
+	       * A JavaScript implementation of the RIPEMD-160 Algorithm
+	       * Version 2.2 Copyright Jeremy Lin, Paul Johnston 2000 - 2009.
+	       * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+	       * See http://pajhome.org.uk/crypt/md5 for details.
+	       * Also http://www.ocf.berkeley.edu/~jjlin/jsotp/
+	       */
+	      RMD160: function RMD160(options) {
+	        /**
+	         * Private properties configuration variables. You may need to tweak these to be compatible with
+	         * the server-side, but the defaults work in most cases.
+	         * @see this.setUpperCase() method
+	         * @see this.setPad() method
+	         */
+	        options && typeof options.uppercase === 'boolean' ? options.uppercase : false;
+
+	        var /* hexadecimal output case format. false - lowercase; true - uppercase  */
+	        b64pad = options && typeof options.pad === 'string' ? options.pa : '=',
 
-	  OverlayNodeFactory.prototype.createNode = function createNode (coord) {
-	    return new Node$1(coord, new DirectedEdgeStar())
-	  };
-	  OverlayNodeFactory.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  OverlayNodeFactory.prototype.getClass = function getClass () {
-	    return OverlayNodeFactory
-	  };
+	        /* base-64 pad character. Default '=' for strict RFC compliance   */
+	        utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
 
-	  return OverlayNodeFactory;
-	}(NodeFactory));
+	        /* enable/disable utf8 encoding */
+	        rmd160_r1 = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8, 3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12, 1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2, 4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13],
+	            rmd160_r2 = [5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12, 6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2, 15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13, 8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14, 12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11],
+	            rmd160_s1 = [11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8, 7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12, 11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5, 11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12, 9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6],
+	            rmd160_s2 = [8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6, 9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11, 9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5, 15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8, 8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11];
+	        /* privileged (public) methods */
+
+	        this.hex = function (s) {
+	          return rstr2hex(rstr(s));
+	        };
 
-	var OrientedCoordinateArray = function OrientedCoordinateArray () {
-	  this._pts = null;
-	  this._orientation = null;
-	  var pts = arguments[0];
-	  this._pts = pts;
-	  this._orientation = OrientedCoordinateArray.orientation(pts);
-	};
-	OrientedCoordinateArray.prototype.compareTo = function compareTo (o1) {
-	  var oca = o1;
-	  var comp = OrientedCoordinateArray.compareOriented(this._pts, this._orientation, oca._pts, oca._orientation);
-	  return comp
-	};
-	OrientedCoordinateArray.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable]
-	};
-	OrientedCoordinateArray.prototype.getClass = function getClass () {
-	  return OrientedCoordinateArray
-	};
-	OrientedCoordinateArray.orientation = function orientation (pts) {
-	  return CoordinateArrays.increasingDirection(pts) === 1
-	};
-	OrientedCoordinateArray.compareOriented = function compareOriented (pts1, orientation1, pts2, orientation2) {
-	  var dir1 = orientation1 ? 1 : -1;
-	  var dir2 = orientation2 ? 1 : -1;
-	  var limit1 = orientation1 ? pts1.length : -1;
-	  var limit2 = orientation2 ? pts2.length : -1;
-	  var i1 = orientation1 ? 0 : pts1.length - 1;
-	  var i2 = orientation2 ? 0 : pts2.length - 1;
-	  // const comp = 0
-	  while (true) {
-	    var compPt = pts1[i1].compareTo(pts2[i2]);
-	    if (compPt !== 0) { return compPt }
-	    i1 += dir1;
-	    i2 += dir2;
-	    var done1 = i1 === limit1;
-	    var done2 = i2 === limit2;
-	    if (done1 && !done2) { return -1 }
-	    if (!done1 && done2) { return 1 }
-	    if (done1 && done2) { return 0 }
-	  }
-	};
+	        this.b64 = function (s) {
+	          return rstr2b64(rstr(s), b64pad);
+	        };
 
-	var EdgeList = function EdgeList () {
-	  this._edges = new ArrayList();
-	  this._ocaMap = new TreeMap();
-	};
-	EdgeList.prototype.print = function print (out) {
-	    var this$1 = this;
-
-	  out.print('MULTILINESTRING ( ');
-	  for (var j = 0; j < this._edges.size(); j++) {
-	    var e = this$1._edges.get(j);
-	    if (j > 0) { out.print(','); }
-	    out.print('(');
-	    var pts = e.getCoordinates();
-	    for (var i = 0; i < pts.length; i++) {
-	      if (i > 0) { out.print(','); }
-	      out.print(pts[i].x + ' ' + pts[i].y);
-	    }
-	    out.println(')');
-	  }
-	  out.print(')  ');
-	};
-	EdgeList.prototype.addAll = function addAll (edgeColl) {
-	    var this$1 = this;
+	        this.any = function (s, e) {
+	          return rstr2any(rstr(s), e);
+	        };
 
-	  for (var i = edgeColl.iterator(); i.hasNext();) {
-	    this$1.add(i.next());
-	  }
-	};
-	EdgeList.prototype.findEdgeIndex = function findEdgeIndex (e) {
-	    var this$1 = this;
+	        this.raw = function (s) {
+	          return rstr(s);
+	        };
 
-	  for (var i = 0; i < this._edges.size(); i++) {
-	    if (this$1._edges.get(i).equals(e)) { return i }
-	  }
-	  return -1
-	};
-	EdgeList.prototype.iterator = function iterator () {
-	  return this._edges.iterator()
-	};
-	EdgeList.prototype.getEdges = function getEdges () {
-	  return this._edges
-	};
-	EdgeList.prototype.get = function get (i) {
-	  return this._edges.get(i)
-	};
-	EdgeList.prototype.findEqualEdge = function findEqualEdge (e) {
-	  var oca = new OrientedCoordinateArray(e.getCoordinates());
-	  var matchEdge = this._ocaMap.get(oca);
-	  return matchEdge
-	};
-	EdgeList.prototype.add = function add (e) {
-	  this._edges.add(e);
-	  var oca = new OrientedCoordinateArray(e.getCoordinates());
-	  this._ocaMap.put(oca, e);
-	};
-	EdgeList.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	EdgeList.prototype.getClass = function getClass () {
-	  return EdgeList
-	};
+	        this.hex_hmac = function (k, d) {
+	          return rstr2hex(rstr_hmac(k, d));
+	        };
 
-	var SegmentIntersector = function SegmentIntersector () {};
+	        this.b64_hmac = function (k, d) {
+	          return rstr2b64(rstr_hmac(k, d), b64pad);
+	        };
 
-	SegmentIntersector.prototype.processIntersections = function processIntersections (e0, segIndex0, e1, segIndex1) {};
-	SegmentIntersector.prototype.isDone = function isDone () {};
-	SegmentIntersector.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SegmentIntersector.prototype.getClass = function getClass () {
-	  return SegmentIntersector
-	};
+	        this.any_hmac = function (k, d, e) {
+	          return rstr2any(rstr_hmac(k, d), e);
+	        };
+	        /**
+	         * Perform a simple self-test to see if the VM is working
+	         * @return {String} Hexadecimal hash sample
+	         * @public
+	         */
 
-	var IntersectionAdder = function IntersectionAdder () {
-	  this._hasIntersection = false;
-	  this._hasProper = false;
-	  this._hasProperInterior = false;
-	  this._hasInterior = false;
-	  this._properIntersectionPoint = null;
-	  this._li = null;
-	  this._isSelfIntersection = null;
-	  this.numIntersections = 0;
-	  this.numInteriorIntersections = 0;
-	  this.numProperIntersections = 0;
-	  this.numTests = 0;
-	  var li = arguments[0];
-	  this._li = li;
-	};
-	IntersectionAdder.prototype.isTrivialIntersection = function isTrivialIntersection (e0, segIndex0, e1, segIndex1) {
-	  if (e0 === e1) {
-	    if (this._li.getIntersectionNum() === 1) {
-	      if (IntersectionAdder.isAdjacentSegments(segIndex0, segIndex1)) { return true }
-	      if (e0.isClosed()) {
-	        var maxSegIndex = e0.size() - 1;
-	        if ((segIndex0 === 0 && segIndex1 === maxSegIndex) ||
-	            (segIndex1 === 0 && segIndex0 === maxSegIndex)) {
-	          return true
-	        }
-	      }
-	    }
-	  }
-	  return false
-	};
-	IntersectionAdder.prototype.getProperIntersectionPoint = function getProperIntersectionPoint () {
-	  return this._properIntersectionPoint
-	};
-	IntersectionAdder.prototype.hasProperInteriorIntersection = function hasProperInteriorIntersection () {
-	  return this._hasProperInterior
-	};
-	IntersectionAdder.prototype.getLineIntersector = function getLineIntersector () {
-	  return this._li
-	};
-	IntersectionAdder.prototype.hasProperIntersection = function hasProperIntersection () {
-	  return this._hasProper
-	};
-	IntersectionAdder.prototype.processIntersections = function processIntersections (e0, segIndex0, e1, segIndex1) {
-	  if (e0 === e1 && segIndex0 === segIndex1) { return null }
-	  this.numTests++;
-	  var p00 = e0.getCoordinates()[segIndex0];
-	  var p01 = e0.getCoordinates()[segIndex0 + 1];
-	  var p10 = e1.getCoordinates()[segIndex1];
-	  var p11 = e1.getCoordinates()[segIndex1 + 1];
-	  this._li.computeIntersection(p00, p01, p10, p11);
-	  if (this._li.hasIntersection()) {
-	    this.numIntersections++;
-	    if (this._li.isInteriorIntersection()) {
-	      this.numInteriorIntersections++;
-	      this._hasInterior = true;
-	    }
-	    if (!this.isTrivialIntersection(e0, segIndex0, e1, segIndex1)) {
-	      this._hasIntersection = true;
-	      e0.addIntersections(this._li, segIndex0, 0);
-	      e1.addIntersections(this._li, segIndex1, 1);
-	      if (this._li.isProper()) {
-	        this.numProperIntersections++;
-	        this._hasProper = true;
-	        this._hasProperInterior = true;
-	      }
-	    }
-	  }
-	};
-	IntersectionAdder.prototype.hasIntersection = function hasIntersection () {
-	  return this._hasIntersection
-	};
-	IntersectionAdder.prototype.isDone = function isDone () {
-	  return false
-	};
-	IntersectionAdder.prototype.hasInteriorIntersection = function hasInteriorIntersection () {
-	  return this._hasInterior
-	};
-	IntersectionAdder.prototype.interfaces_ = function interfaces_ () {
-	  return [SegmentIntersector]
-	};
-	IntersectionAdder.prototype.getClass = function getClass () {
-	  return IntersectionAdder
-	};
-	IntersectionAdder.isAdjacentSegments = function isAdjacentSegments (i1, i2) {
-	  return Math.abs(i1 - i2) === 1
-	};
 
-	var EdgeIntersection = function EdgeIntersection () {
-	  this.coord = null;
-	  this.segmentIndex = null;
-	  this.dist = null;
-	  var coord = arguments[0];
-	  var segmentIndex = arguments[1];
-	  var dist = arguments[2];
-	  this.coord = new Coordinate(coord);
-	  this.segmentIndex = segmentIndex;
-	  this.dist = dist;
-	};
-	EdgeIntersection.prototype.getSegmentIndex = function getSegmentIndex () {
-	  return this.segmentIndex
-	};
-	EdgeIntersection.prototype.getCoordinate = function getCoordinate () {
-	  return this.coord
-	};
-	EdgeIntersection.prototype.print = function print (out) {
-	  out.print(this.coord);
-	  out.print(' seg # = ' + this.segmentIndex);
-	  out.println(' dist = ' + this.dist);
-	};
-	EdgeIntersection.prototype.compareTo = function compareTo (obj) {
-	  var other = obj;
-	  return this.compare(other.segmentIndex, other.dist)
-	};
-	EdgeIntersection.prototype.isEndPoint = function isEndPoint (maxSegmentIndex) {
-	  if (this.segmentIndex === 0 && this.dist === 0.0) { return true }
-	  if (this.segmentIndex === maxSegmentIndex) { return true }
-	  return false
-	};
-	EdgeIntersection.prototype.toString = function toString () {
-	  return this.coord + ' seg # = ' + this.segmentIndex + ' dist = ' + this.dist
-	};
-	EdgeIntersection.prototype.getDistance = function getDistance () {
-	  return this.dist
-	};
-	EdgeIntersection.prototype.compare = function compare (segmentIndex, dist) {
-	  if (this.segmentIndex < segmentIndex) { return -1 }
-	  if (this.segmentIndex > segmentIndex) { return 1 }
-	  if (this.dist < dist) { return -1 }
-	  if (this.dist > dist) { return 1 }
-	  return 0
-	};
-	EdgeIntersection.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable]
-	};
-	EdgeIntersection.prototype.getClass = function getClass () {
-	  return EdgeIntersection
-	};
+	        this.vm_test = function () {
+	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+	        };
+	        /**
+	         * @description Enable/disable uppercase hexadecimal returned string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	var EdgeIntersectionList = function EdgeIntersectionList () {
-	  this._nodeMap = new TreeMap();
-	  this.edge = null;
-	  var edge = arguments[0];
-	  this.edge = edge;
-	};
-	EdgeIntersectionList.prototype.print = function print (out) {
-	  out.println('Intersections:');
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var ei = it.next();
-	    ei.print(out);
-	  }
-	};
-	EdgeIntersectionList.prototype.iterator = function iterator () {
-	  return this._nodeMap.values().iterator()
-	};
-	EdgeIntersectionList.prototype.addSplitEdges = function addSplitEdges (edgeList) {
-	    var this$1 = this;
-
-	  this.addEndpoints();
-	  var it = this.iterator();
-	  var eiPrev = it.next();
-	  while (it.hasNext()) {
-	    var ei = it.next();
-	    var newEdge = this$1.createSplitEdge(eiPrev, ei);
-	    edgeList.add(newEdge);
-	    eiPrev = ei;
-	  }
-	};
-	EdgeIntersectionList.prototype.addEndpoints = function addEndpoints () {
-	  var maxSegIndex = this.edge.pts.length - 1;
-	  this.add(this.edge.pts[0], 0, 0.0);
-	  this.add(this.edge.pts[maxSegIndex], maxSegIndex, 0.0);
-	};
-	EdgeIntersectionList.prototype.createSplitEdge = function createSplitEdge (ei0, ei1) {
-	    var this$1 = this;
-
-	  var npts = ei1.segmentIndex - ei0.segmentIndex + 2;
-	  var lastSegStartPt = this.edge.pts[ei1.segmentIndex];
-	  var useIntPt1 = ei1.dist > 0.0 || !ei1.coord.equals2D(lastSegStartPt);
-	  if (!useIntPt1) {
-	    npts--;
-	  }
-	  var pts = new Array(npts).fill(null);
-	  var ipt = 0;
-	  pts[ipt++] = new Coordinate(ei0.coord);
-	  for (var i = ei0.segmentIndex + 1; i <= ei1.segmentIndex; i++) {
-	    pts[ipt++] = this$1.edge.pts[i];
-	  }
-	  if (useIntPt1) { pts[ipt] = ei1.coord; }
-	  return new Edge(pts, new Label(this.edge._label))
-	};
-	EdgeIntersectionList.prototype.add = function add (intPt, segmentIndex, dist) {
-	  var eiNew = new EdgeIntersection(intPt, segmentIndex, dist);
-	  var ei = this._nodeMap.get(eiNew);
-	  if (ei !== null) {
-	    return ei
-	  }
-	  this._nodeMap.put(eiNew, eiNew);
-	  return eiNew
-	};
-	EdgeIntersectionList.prototype.isIntersection = function isIntersection (pt) {
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var ei = it.next();
-	    if (ei.coord.equals(pt)) { return true }
-	  }
-	  return false
-	};
-	EdgeIntersectionList.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	EdgeIntersectionList.prototype.getClass = function getClass () {
-	  return EdgeIntersectionList
-	};
 
-	var MonotoneChainIndexer = function MonotoneChainIndexer () {};
+	        this.setUpperCase = function (a) {
 
-	MonotoneChainIndexer.prototype.getChainStartIndices = function getChainStartIndices (pts) {
-	    var this$1 = this;
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {string} Pad
+	         * @return {Object} this
+	         * @public
+	         */
 
-	  var start = 0;
-	  var startIndexList = new ArrayList();
-	  startIndexList.add(new Integer(start));
-	  do {
-	    var last = this$1.findChainEnd(pts, start);
-	    startIndexList.add(new Integer(last));
-	    start = last;
-	  } while (start < pts.length - 1)
-	  var startIndex = MonotoneChainIndexer.toIntArray(startIndexList);
-	  return startIndex
-	};
-	MonotoneChainIndexer.prototype.findChainEnd = function findChainEnd (pts, start) {
-	  var chainQuad = Quadrant.quadrant(pts[start], pts[start + 1]);
-	  var last = start + 1;
-	  while (last < pts.length) {
-	    var quad = Quadrant.quadrant(pts[last - 1], pts[last]);
-	    if (quad !== chainQuad) { break }
-	    last++;
-	  }
-	  return last - 1
-	};
-	MonotoneChainIndexer.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MonotoneChainIndexer.prototype.getClass = function getClass () {
-	  return MonotoneChainIndexer
-	};
-	MonotoneChainIndexer.toIntArray = function toIntArray (list) {
-	  var array = new Array(list.size()).fill(null);
-	  for (var i = 0; i < array.length; i++) {
-	    array[i] = list.get(i).intValue();
-	  }
-	  return array
-	};
 
-	var MonotoneChainEdge = function MonotoneChainEdge () {
-	  this.e = null;
-	  this.pts = null;
-	  this.startIndex = null;
-	  this.env1 = new Envelope();
-	  this.env2 = new Envelope();
-	  var e = arguments[0];
-	  this.e = e;
-	  this.pts = e.getCoordinates();
-	  var mcb = new MonotoneChainIndexer();
-	  this.startIndex = mcb.getChainStartIndices(this.pts);
-	};
-	MonotoneChainEdge.prototype.getCoordinates = function getCoordinates () {
-	  return this.pts
-	};
-	MonotoneChainEdge.prototype.getMaxX = function getMaxX (chainIndex) {
-	  var x1 = this.pts[this.startIndex[chainIndex]].x;
-	  var x2 = this.pts[this.startIndex[chainIndex + 1]].x;
-	  return x1 > x2 ? x1 : x2
-	};
-	MonotoneChainEdge.prototype.getMinX = function getMinX (chainIndex) {
-	  var x1 = this.pts[this.startIndex[chainIndex]].x;
-	  var x2 = this.pts[this.startIndex[chainIndex + 1]].x;
-	  return x1 < x2 ? x1 : x2
-	};
-	MonotoneChainEdge.prototype.computeIntersectsForChain = function computeIntersectsForChain () {
-	  if (arguments.length === 4) {
-	    var chainIndex0 = arguments[0];
-	    var mce = arguments[1];
-	    var chainIndex1 = arguments[2];
-	    var si = arguments[3];
-	    this.computeIntersectsForChain(this.startIndex[chainIndex0], this.startIndex[chainIndex0 + 1], mce, mce.startIndex[chainIndex1], mce.startIndex[chainIndex1 + 1], si);
-	  } else if (arguments.length === 6) {
-	    var start0 = arguments[0];
-	    var end0 = arguments[1];
-	    var mce$1 = arguments[2];
-	    var start1 = arguments[3];
-	    var end1 = arguments[4];
-	    var ei = arguments[5];
-	    var p00 = this.pts[start0];
-	    var p01 = this.pts[end0];
-	    var p10 = mce$1.pts[start1];
-	    var p11 = mce$1.pts[end1];
-	    if (end0 - start0 === 1 && end1 - start1 === 1) {
-	      ei.addIntersections(this.e, start0, mce$1.e, start1);
-	      return null
-	    }
-	    this.env1.init(p00, p01);
-	    this.env2.init(p10, p11);
-	    if (!this.env1.intersects(this.env2)) { return null }
-	    var mid0 = Math.trunc((start0 + end0) / 2);
-	    var mid1 = Math.trunc((start1 + end1) / 2);
-	    if (start0 < mid0) {
-	      if (start1 < mid1) { this.computeIntersectsForChain(start0, mid0, mce$1, start1, mid1, ei); }
-	      if (mid1 < end1) { this.computeIntersectsForChain(start0, mid0, mce$1, mid1, end1, ei); }
-	    }
-	    if (mid0 < end0) {
-	      if (start1 < mid1) { this.computeIntersectsForChain(mid0, end0, mce$1, start1, mid1, ei); }
-	      if (mid1 < end1) { this.computeIntersectsForChain(mid0, end0, mce$1, mid1, end1, ei); }
-	    }
-	  }
-	};
-	MonotoneChainEdge.prototype.getStartIndexes = function getStartIndexes () {
-	  return this.startIndex
-	};
-	MonotoneChainEdge.prototype.computeIntersects = function computeIntersects (mce, si) {
-	    var this$1 = this;
+	        this.setPad = function (a) {
+	          if (typeof a !== 'undefined') {
+	            b64pad = a;
+	          }
 
-	  for (var i = 0; i < this.startIndex.length - 1; i++) {
-	    for (var j = 0; j < mce.startIndex.length - 1; j++) {
-	      this$1.computeIntersectsForChain(i, mce, j, si);
-	    }
-	  }
-	};
-	MonotoneChainEdge.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MonotoneChainEdge.prototype.getClass = function getClass () {
-	  return MonotoneChainEdge
-	};
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	var Depth = function Depth () {
-	  var this$1 = this;
 
-	  this._depth = Array(2).fill().map(function () { return Array(3); });
-	  for (var i = 0; i < 2; i++) {
-	    for (var j = 0; j < 3; j++) {
-	      this$1._depth[i][j] = Depth.NULL_VALUE;
-	    }
-	  }
-	};
+	        this.setUTF8 = function (a) {
+	          if (typeof a === 'boolean') {
+	            utf8 = a;
+	          }
 
-	var staticAccessors$31 = { NULL_VALUE: { configurable: true } };
-	Depth.prototype.getDepth = function getDepth (geomIndex, posIndex) {
-	  return this._depth[geomIndex][posIndex]
-	};
-	Depth.prototype.setDepth = function setDepth (geomIndex, posIndex, depthValue) {
-	  this._depth[geomIndex][posIndex] = depthValue;
-	};
-	Depth.prototype.isNull = function isNull () {
-	    var this$1 = this;
+	          return this;
+	        };
+	        /* private methods */
 
-	  if (arguments.length === 0) {
-	    for (var i = 0; i < 2; i++) {
-	      for (var j = 0; j < 3; j++) {
-	        if (this$1._depth[i][j] !== Depth.NULL_VALUE) { return false }
-	      }
-	    }
-	    return true
-	  } else if (arguments.length === 1) {
-	    var geomIndex = arguments[0];
-	    return this._depth[geomIndex][1] === Depth.NULL_VALUE
-	  } else if (arguments.length === 2) {
-	    var geomIndex$1 = arguments[0];
-	    var posIndex = arguments[1];
-	    return this._depth[geomIndex$1][posIndex] === Depth.NULL_VALUE
-	  }
-	};
-	Depth.prototype.normalize = function normalize () {
-	    var this$1 = this;
+	        /**
+	         * Calculate the rmd160 of a raw string
+	         */
 
-	  for (var i = 0; i < 2; i++) {
-	    if (!this$1.isNull(i)) {
-	      var minDepth = this$1._depth[i][1];
-	      if (this$1._depth[i][2] < minDepth) { minDepth = this$1._depth[i][2]; }
-	      if (minDepth < 0) { minDepth = 0; }
-	      for (var j = 1; j < 3; j++) {
-	        var newValue = 0;
-	        if (this$1._depth[i][j] > minDepth) { newValue = 1; }
-	        this$1._depth[i][j] = newValue;
-	      }
-	    }
-	  }
-	};
-	Depth.prototype.getDelta = function getDelta (geomIndex) {
-	  return this._depth[geomIndex][Position.RIGHT] - this._depth[geomIndex][Position.LEFT]
-	};
-	Depth.prototype.getLocation = function getLocation (geomIndex, posIndex) {
-	  if (this._depth[geomIndex][posIndex] <= 0) { return Location.EXTERIOR }
-	  return Location.INTERIOR
-	};
-	Depth.prototype.toString = function toString () {
-	  return 'A: ' + this._depth[0][1] + ',' + this._depth[0][2] + ' B: ' + this._depth[1][1] + ',' + this._depth[1][2]
-	};
-	Depth.prototype.add = function add () {
-	    var this$1 = this;
 
-	  if (arguments.length === 1) {
-	    var lbl = arguments[0];
-	    for (var i = 0; i < 2; i++) {
-	      for (var j = 1; j < 3; j++) {
-	        var loc = lbl.getLocation(i, j);
-	        if (loc === Location.EXTERIOR || loc === Location.INTERIOR) {
-	          if (this$1.isNull(i, j)) {
-	            this$1._depth[i][j] = Depth.depthAtLocation(loc);
-	          } else { this$1._depth[i][j] += Depth.depthAtLocation(loc); }
+	        function rstr(s) {
+	          s = utf8 ? utf8Encode(s) : s;
+	          return binl2rstr(binl(rstr2binl(s), s.length * 8));
 	        }
-	      }
-	    }
-	  } else if (arguments.length === 3) {
-	    var geomIndex = arguments[0];
-	    var posIndex = arguments[1];
-	    var location = arguments[2];
-	    if (location === Location.INTERIOR) { this._depth[geomIndex][posIndex]++; }
-	  }
-	};
-	Depth.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Depth.prototype.getClass = function getClass () {
-	  return Depth
-	};
-	Depth.depthAtLocation = function depthAtLocation (location) {
-	  if (location === Location.EXTERIOR) { return 0 }
-	  if (location === Location.INTERIOR) { return 1 }
-	  return Depth.NULL_VALUE
-	};
-	staticAccessors$31.NULL_VALUE.get = function () { return -1 };
-
-	Object.defineProperties( Depth, staticAccessors$31 );
-
-	var Edge = (function (GraphComponent$$1) {
-	  function Edge () {
-	    GraphComponent$$1.call(this);
-	    this.pts = null;
-	    this._env = null;
-	    this.eiList = new EdgeIntersectionList(this);
-	    this._name = null;
-	    this._mce = null;
-	    this._isIsolated = true;
-	    this._depth = new Depth();
-	    this._depthDelta = 0;
-	    if (arguments.length === 1) {
-	      var pts = arguments[0];
-	      Edge.call(this, pts, null);
-	    } else if (arguments.length === 2) {
-	      var pts$1 = arguments[0];
-	      var label = arguments[1];
-	      this.pts = pts$1;
-	      this._label = label;
-	    }
-	  }
+	        /**
+	         * Calculate the HMAC-rmd160 of a key and some data (raw strings)
+	         */
 
-	  if ( GraphComponent$$1 ) { Edge.__proto__ = GraphComponent$$1; }
-	  Edge.prototype = Object.create( GraphComponent$$1 && GraphComponent$$1.prototype );
-	  Edge.prototype.constructor = Edge;
-	  Edge.prototype.getDepth = function getDepth () {
-	    return this._depth
-	  };
-	  Edge.prototype.getCollapsedEdge = function getCollapsedEdge () {
-	    var newPts = new Array(2).fill(null);
-	    newPts[0] = this.pts[0];
-	    newPts[1] = this.pts[1];
-	    var newe = new Edge(newPts, Label.toLineLabel(this._label));
-	    return newe
-	  };
-	  Edge.prototype.isIsolated = function isIsolated () {
-	    return this._isIsolated
-	  };
-	  Edge.prototype.getCoordinates = function getCoordinates () {
-	    return this.pts
-	  };
-	  Edge.prototype.setIsolated = function setIsolated (isIsolated) {
-	    this._isIsolated = isIsolated;
-	  };
-	  Edge.prototype.setName = function setName (name) {
-	    this._name = name;
-	  };
-	  Edge.prototype.equals = function equals (o) {
-	    var this$1 = this;
 
-	    if (!(o instanceof Edge)) { return false }
-	    var e = o;
-	    if (this.pts.length !== e.pts.length) { return false }
-	    var isEqualForward = true;
-	    var isEqualReverse = true;
-	    var iRev = this.pts.length;
-	    for (var i = 0; i < this.pts.length; i++) {
-	      if (!this$1.pts[i].equals2D(e.pts[i])) {
-	        isEqualForward = false;
-	      }
-	      if (!this$1.pts[i].equals2D(e.pts[--iRev])) {
-	        isEqualReverse = false;
-	      }
-	      if (!isEqualForward && !isEqualReverse) { return false }
-	    }
-	    return true
-	  };
-	  Edge.prototype.getCoordinate = function getCoordinate () {
-	    if (arguments.length === 0) {
-	      if (this.pts.length > 0) { return this.pts[0] }
-	      return null
-	    } else if (arguments.length === 1) {
-	      var i = arguments[0];
-	      return this.pts[i]
-	    }
-	  };
-	  Edge.prototype.print = function print (out) {
-	    var this$1 = this;
+	        function rstr_hmac(key, data) {
+	          key = utf8 ? utf8Encode(key) : key;
+	          data = utf8 ? utf8Encode(data) : data;
+	          var i,
+	              hash,
+	              bkey = rstr2binl(key),
+	              ipad = Array(16),
+	              opad = Array(16);
 
-	    out.print('edge ' + this._name + ': ');
-	    out.print('LINESTRING (');
-	    for (var i = 0; i < this.pts.length; i++) {
-	      if (i > 0) { out.print(','); }
-	      out.print(this$1.pts[i].x + ' ' + this$1.pts[i].y);
-	    }
-	    out.print(')  ' + this._label + ' ' + this._depthDelta);
-	  };
-	  Edge.prototype.computeIM = function computeIM (im) {
-	    Edge.updateIM(this._label, im);
-	  };
-	  Edge.prototype.isCollapsed = function isCollapsed () {
-	    if (!this._label.isArea()) { return false }
-	    if (this.pts.length !== 3) { return false }
-	    if (this.pts[0].equals(this.pts[2])) { return true }
-	    return false
-	  };
-	  Edge.prototype.isClosed = function isClosed () {
-	    return this.pts[0].equals(this.pts[this.pts.length - 1])
-	  };
-	  Edge.prototype.getMaximumSegmentIndex = function getMaximumSegmentIndex () {
-	    return this.pts.length - 1
-	  };
-	  Edge.prototype.getDepthDelta = function getDepthDelta () {
-	    return this._depthDelta
-	  };
-	  Edge.prototype.getNumPoints = function getNumPoints () {
-	    return this.pts.length
-	  };
-	  Edge.prototype.printReverse = function printReverse (out) {
-	    var this$1 = this;
+	          if (bkey.length > 16) {
+	            bkey = binl(bkey, key.length * 8);
+	          }
 
-	    out.print('edge ' + this._name + ': ');
-	    for (var i = this.pts.length - 1; i >= 0; i--) {
-	      out.print(this$1.pts[i] + ' ');
-	    }
-	    out.println('');
-	  };
-	  Edge.prototype.getMonotoneChainEdge = function getMonotoneChainEdge () {
-	    if (this._mce === null) { this._mce = new MonotoneChainEdge(this); }
-	    return this._mce
-	  };
-	  Edge.prototype.getEnvelope = function getEnvelope () {
-	    var this$1 = this;
+	          for (i = 0; i < 16; i += 1) {
+	            ipad[i] = bkey[i] ^ 0x36363636;
+	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	          }
 
-	    if (this._env === null) {
-	      this._env = new Envelope();
-	      for (var i = 0; i < this.pts.length; i++) {
-	        this$1._env.expandToInclude(this$1.pts[i]);
-	      }
-	    }
-	    return this._env
-	  };
-	  Edge.prototype.addIntersection = function addIntersection (li, segmentIndex, geomIndex, intIndex) {
-	    var intPt = new Coordinate(li.getIntersection(intIndex));
-	    var normalizedSegmentIndex = segmentIndex;
-	    var dist = li.getEdgeDistance(geomIndex, intIndex);
-	    var nextSegIndex = normalizedSegmentIndex + 1;
-	    if (nextSegIndex < this.pts.length) {
-	      var nextPt = this.pts[nextSegIndex];
-	      if (intPt.equals2D(nextPt)) {
-	        normalizedSegmentIndex = nextSegIndex;
-	        dist = 0.0;
-	      }
-	    }
-	    this.eiList.add(intPt, normalizedSegmentIndex, dist);
-	  };
-	  Edge.prototype.toString = function toString () {
-	    var this$1 = this;
+	          hash = binl(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
+	          return binl2rstr(binl(opad.concat(hash), 512 + 160));
+	        }
+	        /**
+	         * Convert an array of little-endian words to a string
+	         */
 
-	    var buf = new StringBuffer();
-	    buf.append('edge ' + this._name + ': ');
-	    buf.append('LINESTRING (');
-	    for (var i = 0; i < this.pts.length; i++) {
-	      if (i > 0) { buf.append(','); }
-	      buf.append(this$1.pts[i].x + ' ' + this$1.pts[i].y);
-	    }
-	    buf.append(')  ' + this._label + ' ' + this._depthDelta);
-	    return buf.toString()
-	  };
-	  Edge.prototype.isPointwiseEqual = function isPointwiseEqual (e) {
-	    var this$1 = this;
 
-	    if (this.pts.length !== e.pts.length) { return false }
-	    for (var i = 0; i < this.pts.length; i++) {
-	      if (!this$1.pts[i].equals2D(e.pts[i])) {
-	        return false
-	      }
-	    }
-	    return true
-	  };
-	  Edge.prototype.setDepthDelta = function setDepthDelta (depthDelta) {
-	    this._depthDelta = depthDelta;
-	  };
-	  Edge.prototype.getEdgeIntersectionList = function getEdgeIntersectionList () {
-	    return this.eiList
-	  };
-	  Edge.prototype.addIntersections = function addIntersections (li, segmentIndex, geomIndex) {
-	    var this$1 = this;
+	        function binl2rstr(input) {
+	          var i,
+	              output = '',
+	              l = input.length * 32;
 
-	    for (var i = 0; i < li.getIntersectionNum(); i++) {
-	      this$1.addIntersection(li, segmentIndex, geomIndex, i);
-	    }
-	  };
-	  Edge.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  Edge.prototype.getClass = function getClass () {
-	    return Edge
-	  };
-	  Edge.updateIM = function updateIM () {
-	    if (arguments.length === 2) {
-	      var label = arguments[0];
-	      var im = arguments[1];
-	      im.setAtLeastIfValid(label.getLocation(0, Position.ON), label.getLocation(1, Position.ON), 1);
-	      if (label.isArea()) {
-	        im.setAtLeastIfValid(label.getLocation(0, Position.LEFT), label.getLocation(1, Position.LEFT), 2);
-	        im.setAtLeastIfValid(label.getLocation(0, Position.RIGHT), label.getLocation(1, Position.RIGHT), 2);
-	      }
-	    } else { return GraphComponent$$1.prototype.updateIM.apply(this, arguments) }
-	  };
+	          for (i = 0; i < l; i += 8) {
+	            output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
+	          }
 
-	  return Edge;
-	}(GraphComponent));
+	          return output;
+	        }
+	        /**
+	         * Calculate the RIPE-MD160 of an array of little-endian words, and a bit length.
+	         */
+
+
+	        function binl(x, len) {
+	          var T,
+	              j,
+	              i,
+	              l,
+	              h0 = 0x67452301,
+	              h1 = 0xefcdab89,
+	              h2 = 0x98badcfe,
+	              h3 = 0x10325476,
+	              h4 = 0xc3d2e1f0,
+	              A1,
+	              B1,
+	              C1,
+	              D1,
+	              E1,
+	              A2,
+	              B2,
+	              C2,
+	              D2,
+	              E2;
+	          /* append padding */
+
+	          x[len >> 5] |= 0x80 << len % 32;
+	          x[(len + 64 >>> 9 << 4) + 14] = len;
+	          l = x.length;
+
+	          for (i = 0; i < l; i += 16) {
+	            A1 = A2 = h0;
+	            B1 = B2 = h1;
+	            C1 = C2 = h2;
+	            D1 = D2 = h3;
+	            E1 = E2 = h4;
+
+	            for (j = 0; j <= 79; j += 1) {
+	              T = safe_add(A1, rmd160_f(j, B1, C1, D1));
+	              T = safe_add(T, x[i + rmd160_r1[j]]);
+	              T = safe_add(T, rmd160_K1(j));
+	              T = safe_add(bit_rol(T, rmd160_s1[j]), E1);
+	              A1 = E1;
+	              E1 = D1;
+	              D1 = bit_rol(C1, 10);
+	              C1 = B1;
+	              B1 = T;
+	              T = safe_add(A2, rmd160_f(79 - j, B2, C2, D2));
+	              T = safe_add(T, x[i + rmd160_r2[j]]);
+	              T = safe_add(T, rmd160_K2(j));
+	              T = safe_add(bit_rol(T, rmd160_s2[j]), E2);
+	              A2 = E2;
+	              E2 = D2;
+	              D2 = bit_rol(C2, 10);
+	              C2 = B2;
+	              B2 = T;
+	            }
+
+	            T = safe_add(h1, safe_add(C1, D2));
+	            h1 = safe_add(h2, safe_add(D1, E2));
+	            h2 = safe_add(h3, safe_add(E1, A2));
+	            h3 = safe_add(h4, safe_add(A1, B2));
+	            h4 = safe_add(h0, safe_add(B1, C2));
+	            h0 = T;
+	          }
 
-	var BufferBuilder = function BufferBuilder (bufParams) {
-	  this._workingPrecisionModel = null;
-	  this._workingNoder = null;
-	  this._geomFact = null;
-	  this._graph = null;
-	  this._edgeList = new EdgeList();
-	  this._bufParams = bufParams || null;
-	};
-	BufferBuilder.prototype.setWorkingPrecisionModel = function setWorkingPrecisionModel (pm) {
-	  this._workingPrecisionModel = pm;
-	};
-	BufferBuilder.prototype.insertUniqueEdge = function insertUniqueEdge (e) {
-	  var existingEdge = this._edgeList.findEqualEdge(e);
-	  if (existingEdge !== null) {
-	    var existingLabel = existingEdge.getLabel();
-	    var labelToMerge = e.getLabel();
-	    if (!existingEdge.isPointwiseEqual(e)) {
-	      labelToMerge = new Label(e.getLabel());
-	      labelToMerge.flip();
-	    }
-	    existingLabel.merge(labelToMerge);
-	    var mergeDelta = BufferBuilder.depthDelta(labelToMerge);
-	    var existingDelta = existingEdge.getDepthDelta();
-	    var newDelta = existingDelta + mergeDelta;
-	    existingEdge.setDepthDelta(newDelta);
-	  } else {
-	    this._edgeList.add(e);
-	    e.setDepthDelta(BufferBuilder.depthDelta(e.getLabel()));
-	  }
-	};
-	BufferBuilder.prototype.buildSubgraphs = function buildSubgraphs (subgraphList, polyBuilder) {
-	  var processedGraphs = new ArrayList();
-	  for (var i = subgraphList.iterator(); i.hasNext();) {
-	    var subgraph = i.next();
-	    var p = subgraph.getRightmostCoordinate();
-	    var locater = new SubgraphDepthLocater(processedGraphs);
-	    var outsideDepth = locater.getDepth(p);
-	    subgraph.computeDepth(outsideDepth);
-	    subgraph.findResultEdges();
-	    processedGraphs.add(subgraph);
-	    polyBuilder.add(subgraph.getDirectedEdges(), subgraph.getNodes());
-	  }
-	};
-	BufferBuilder.prototype.createSubgraphs = function createSubgraphs (graph) {
-	  var subgraphList = new ArrayList();
-	  for (var i = graph.getNodes().iterator(); i.hasNext();) {
-	    var node = i.next();
-	    if (!node.isVisited()) {
-	      var subgraph = new BufferSubgraph();
-	      subgraph.create(node);
-	      subgraphList.add(subgraph);
-	    }
-	  }
-	  Collections.sort(subgraphList, Collections.reverseOrder());
-	  return subgraphList
-	};
-	BufferBuilder.prototype.createEmptyResultGeometry = function createEmptyResultGeometry () {
-	  var emptyGeom = this._geomFact.createPolygon();
-	  return emptyGeom
-	};
-	BufferBuilder.prototype.getNoder = function getNoder (precisionModel) {
-	  if (this._workingNoder !== null) { return this._workingNoder }
-	  var noder = new MCIndexNoder();
-	  var li = new RobustLineIntersector();
-	  li.setPrecisionModel(precisionModel);
-	  noder.setSegmentIntersector(new IntersectionAdder(li));
-	  return noder
-	};
-	BufferBuilder.prototype.buffer = function buffer (g, distance) {
-	  var precisionModel = this._workingPrecisionModel;
-	  if (precisionModel === null) { precisionModel = g.getPrecisionModel(); }
-	  this._geomFact = g.getFactory();
-	  var curveBuilder = new OffsetCurveBuilder(precisionModel, this._bufParams);
-	  var curveSetBuilder = new OffsetCurveSetBuilder(g, distance, curveBuilder);
-	  var bufferSegStrList = curveSetBuilder.getCurves();
-	  if (bufferSegStrList.size() <= 0) {
-	    return this.createEmptyResultGeometry()
-	  }
-	  this.computeNodedEdges(bufferSegStrList, precisionModel);
-	  this._graph = new PlanarGraph(new OverlayNodeFactory());
-	  this._graph.addEdges(this._edgeList.getEdges());
-	  var subgraphList = this.createSubgraphs(this._graph);
-	  var polyBuilder = new PolygonBuilder(this._geomFact);
-	  this.buildSubgraphs(subgraphList, polyBuilder);
-	  var resultPolyList = polyBuilder.getPolygons();
-	  if (resultPolyList.size() <= 0) {
-	    return this.createEmptyResultGeometry()
-	  }
-	  var resultGeom = this._geomFact.buildGeometry(resultPolyList);
-	  return resultGeom
-	};
-	BufferBuilder.prototype.computeNodedEdges = function computeNodedEdges (bufferSegStrList, precisionModel) {
-	    var this$1 = this;
-
-	  var noder = this.getNoder(precisionModel);
-	  noder.computeNodes(bufferSegStrList);
-	  var nodedSegStrings = noder.getNodedSubstrings();
-	  for (var i = nodedSegStrings.iterator(); i.hasNext();) {
-	    var segStr = i.next();
-	    var pts = segStr.getCoordinates();
-	    if (pts.length === 2 && pts[0].equals2D(pts[1])) { continue }
-	    var oldLabel = segStr.getData();
-	    var edge = new Edge(segStr.getCoordinates(), new Label(oldLabel));
-	    this$1.insertUniqueEdge(edge);
-	  }
-	};
-	BufferBuilder.prototype.setNoder = function setNoder (noder) {
-	  this._workingNoder = noder;
-	};
-	BufferBuilder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BufferBuilder.prototype.getClass = function getClass () {
-	  return BufferBuilder
-	};
-	BufferBuilder.depthDelta = function depthDelta (label) {
-	  var lLoc = label.getLocation(0, Position.LEFT);
-	  var rLoc = label.getLocation(0, Position.RIGHT);
-	  if (lLoc === Location.INTERIOR && rLoc === Location.EXTERIOR) { return 1; } else if (lLoc === Location.EXTERIOR && rLoc === Location.INTERIOR) { return -1 }
-	  return 0
-	};
-	BufferBuilder.convertSegStrings = function convertSegStrings (it) {
-	  var fact = new GeometryFactory();
-	  var lines = new ArrayList();
-	  while (it.hasNext()) {
-	    var ss = it.next();
-	    var line = fact.createLineString(ss.getCoordinates());
-	    lines.add(line);
-	  }
-	  return fact.buildGeometry(lines)
-	};
+	          return [h0, h1, h2, h3, h4];
+	        } // specific algorithm methods
 
-	var ScaledNoder = function ScaledNoder () {
-	  this._noder = null;
-	  this._scaleFactor = null;
-	  this._offsetX = null;
-	  this._offsetY = null;
-	  this._isScaled = false;
-	  if (arguments.length === 2) {
-	    var noder = arguments[0];
-	    var scaleFactor = arguments[1];
-	    this._noder = noder;
-	    this._scaleFactor = scaleFactor;
-	    this._offsetX = 0.0;
-	    this._offsetY = 0.0;
-	    this._isScaled = !this.isIntegerPrecision();
-	  } else if (arguments.length === 4) {
-	    var noder$1 = arguments[0];
-	    var scaleFactor$1 = arguments[1];
-	    var offsetX = arguments[2];
-	    var offsetY = arguments[3];
-	    this._noder = noder$1;
-	    this._scaleFactor = scaleFactor$1;
-	    this._offsetX = offsetX;
-	    this._offsetY = offsetY;
-	    this._isScaled = !this.isIntegerPrecision();
-	  }
-	};
-	ScaledNoder.prototype.rescale = function rescale () {
-	    var this$1 = this;
-
-	  if (hasInterface(arguments[0], Collection)) {
-	    var segStrings = arguments[0];
-	    for (var i = segStrings.iterator(); i.hasNext();) {
-	      var ss = i.next();
-	      this$1.rescale(ss.getCoordinates());
-	    }
-	  } else if (arguments[0] instanceof Array) {
-	    var pts = arguments[0];
-	    // let p0 = null
-	    // let p1 = null
-	    // if (pts.length === 2) {
-	    // p0 = new Coordinate(pts[0])
-	    // p1 = new Coordinate(pts[1])
-	    // }
-	    for (var i$1 = 0; i$1 < pts.length; i$1++) {
-	      pts[i$1].x = pts[i$1].x / this$1._scaleFactor + this$1._offsetX;
-	      pts[i$1].y = pts[i$1].y / this$1._scaleFactor + this$1._offsetY;
-	    }
-	    if (pts.length === 2 && pts[0].equals2D(pts[1])) {
-	      System.out.println(pts);
-	    }
-	  }
-	};
-	ScaledNoder.prototype.scale = function scale () {
-	    var this$1 = this;
-
-	  if (hasInterface(arguments[0], Collection)) {
-	    var segStrings = arguments[0];
-	    var nodedSegmentStrings = new ArrayList();
-	    for (var i = segStrings.iterator(); i.hasNext();) {
-	      var ss = i.next();
-	      nodedSegmentStrings.add(new NodedSegmentString(this$1.scale(ss.getCoordinates()), ss.getData()));
-	    }
-	    return nodedSegmentStrings
-	  } else if (arguments[0] instanceof Array) {
-	    var pts = arguments[0];
-	    var roundPts = new Array(pts.length).fill(null);
-	    for (var i$1 = 0; i$1 < pts.length; i$1++) {
-	      roundPts[i$1] = new Coordinate(Math.round((pts[i$1].x - this$1._offsetX) * this$1._scaleFactor), Math.round((pts[i$1].y - this$1._offsetY) * this$1._scaleFactor), pts[i$1].z);
-	    }
-	    var roundPtsNoDup = CoordinateArrays.removeRepeatedPoints(roundPts);
-	    return roundPtsNoDup
-	  }
-	};
-	ScaledNoder.prototype.isIntegerPrecision = function isIntegerPrecision () {
-	  return this._scaleFactor === 1.0
-	};
-	ScaledNoder.prototype.getNodedSubstrings = function getNodedSubstrings () {
-	  var splitSS = this._noder.getNodedSubstrings();
-	  if (this._isScaled) { this.rescale(splitSS); }
-	  return splitSS
-	};
-	ScaledNoder.prototype.computeNodes = function computeNodes (inputSegStrings) {
-	  var intSegStrings = inputSegStrings;
-	  if (this._isScaled) { intSegStrings = this.scale(inputSegStrings); }
-	  this._noder.computeNodes(intSegStrings);
-	};
-	ScaledNoder.prototype.interfaces_ = function interfaces_ () {
-	  return [Noder]
-	};
-	ScaledNoder.prototype.getClass = function getClass () {
-	  return ScaledNoder
-	};
 
-	var NodingValidator = function NodingValidator () {
-	  this._li = new RobustLineIntersector();
-	  this._segStrings = null;
-	  var segStrings = arguments[0];
-	  this._segStrings = segStrings;
-	};
+	        function rmd160_f(j, x, y, z) {
+	          return 0 <= j && j <= 15 ? x ^ y ^ z : 16 <= j && j <= 31 ? x & y | ~x & z : 32 <= j && j <= 47 ? (x | ~y) ^ z : 48 <= j && j <= 63 ? x & z | y & ~z : 64 <= j && j <= 79 ? x ^ (y | ~z) : 'rmd160_f: j out of range';
+	        }
 
-	var staticAccessors$33 = { fact: { configurable: true } };
-	NodingValidator.prototype.checkEndPtVertexIntersections = function checkEndPtVertexIntersections () {
-	    var this$1 = this;
+	        function rmd160_K1(j) {
+	          return 0 <= j && j <= 15 ? 0x00000000 : 16 <= j && j <= 31 ? 0x5a827999 : 32 <= j && j <= 47 ? 0x6ed9eba1 : 48 <= j && j <= 63 ? 0x8f1bbcdc : 64 <= j && j <= 79 ? 0xa953fd4e : 'rmd160_K1: j out of range';
+	        }
 
-	  if (arguments.length === 0) {
-	    for (var i = this._segStrings.iterator(); i.hasNext();) {
-	      var ss = i.next();
-	      var pts = ss.getCoordinates();
-	      this$1.checkEndPtVertexIntersections(pts[0], this$1._segStrings);
-	      this$1.checkEndPtVertexIntersections(pts[pts.length - 1], this$1._segStrings);
-	    }
-	  } else if (arguments.length === 2) {
-	    var testPt = arguments[0];
-	    var segStrings = arguments[1];
-	    for (var i$1 = segStrings.iterator(); i$1.hasNext();) {
-	      var ss$1 = i$1.next();
-	      var pts$1 = ss$1.getCoordinates();
-	      for (var j = 1; j < pts$1.length - 1; j++) {
-	        if (pts$1[j].equals(testPt)) { throw new RuntimeException('found endpt/interior pt intersection at index ' + j + ' :pt ' + testPt) }
-	      }
-	    }
-	  }
-	};
-	NodingValidator.prototype.checkInteriorIntersections = function checkInteriorIntersections () {
-	    var this$1 = this;
-
-	  if (arguments.length === 0) {
-	    for (var i = this._segStrings.iterator(); i.hasNext();) {
-	      var ss0 = i.next();
-	      for (var j = this._segStrings.iterator(); j.hasNext();) {
-	        var ss1 = j.next();
-	        this$1.checkInteriorIntersections(ss0, ss1);
-	      }
-	    }
-	  } else if (arguments.length === 2) {
-	    var ss0$1 = arguments[0];
-	    var ss1$1 = arguments[1];
-	    var pts0 = ss0$1.getCoordinates();
-	    var pts1 = ss1$1.getCoordinates();
-	    for (var i0 = 0; i0 < pts0.length - 1; i0++) {
-	      for (var i1 = 0; i1 < pts1.length - 1; i1++) {
-	        this$1.checkInteriorIntersections(ss0$1, i0, ss1$1, i1);
-	      }
-	    }
-	  } else if (arguments.length === 4) {
-	    var e0 = arguments[0];
-	    var segIndex0 = arguments[1];
-	    var e1 = arguments[2];
-	    var segIndex1 = arguments[3];
-	    if (e0 === e1 && segIndex0 === segIndex1) { return null }
-	    var p00 = e0.getCoordinates()[segIndex0];
-	    var p01 = e0.getCoordinates()[segIndex0 + 1];
-	    var p10 = e1.getCoordinates()[segIndex1];
-	    var p11 = e1.getCoordinates()[segIndex1 + 1];
-	    this._li.computeIntersection(p00, p01, p10, p11);
-	    if (this._li.hasIntersection()) {
-	      if (this._li.isProper() || this.hasInteriorIntersection(this._li, p00, p01) || this.hasInteriorIntersection(this._li, p10, p11)) {
-	        throw new RuntimeException('found non-noded intersection at ' + p00 + '-' + p01 + ' and ' + p10 + '-' + p11)
+	        function rmd160_K2(j) {
+	          return 0 <= j && j <= 15 ? 0x50a28be6 : 16 <= j && j <= 31 ? 0x5c4dd124 : 32 <= j && j <= 47 ? 0x6d703ef3 : 48 <= j && j <= 63 ? 0x7a6d76e9 : 64 <= j && j <= 79 ? 0x00000000 : 'rmd160_K2: j out of range';
+	        }
 	      }
-	    }
-	  }
-	};
-	NodingValidator.prototype.checkValid = function checkValid () {
-	  this.checkEndPtVertexIntersections();
-	  this.checkInteriorIntersections();
-	  this.checkCollapses();
-	};
-	NodingValidator.prototype.checkCollapses = function checkCollapses () {
-	    var this$1 = this;
+	    }; // exposes Hashes
 
-	  if (arguments.length === 0) {
-	    for (var i = this._segStrings.iterator(); i.hasNext();) {
-	      var ss = i.next();
-	      this$1.checkCollapses(ss);
-	    }
-	  } else if (arguments.length === 1) {
-	    var ss$1 = arguments[0];
-	    var pts = ss$1.getCoordinates();
-	    for (var i$1 = 0; i$1 < pts.length - 2; i$1++) {
-	      this$1.checkCollapse(pts[i$1], pts[i$1 + 1], pts[i$1 + 2]);
-	    }
-	  }
-	};
-	NodingValidator.prototype.hasInteriorIntersection = function hasInteriorIntersection (li, p0, p1) {
-	  for (var i = 0; i < li.getIntersectionNum(); i++) {
-	    var intPt = li.getIntersection(i);
-	    if (!(intPt.equals(p0) || intPt.equals(p1))) { return true }
-	  }
-	  return false
-	};
-	NodingValidator.prototype.checkCollapse = function checkCollapse (p0, p1, p2) {
-	  if (p0.equals(p2)) { throw new RuntimeException('found non-noded collapse at ' + NodingValidator.fact.createLineString([p0, p1, p2])) }
-	};
-	NodingValidator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	NodingValidator.prototype.getClass = function getClass () {
-	  return NodingValidator
-	};
-	staticAccessors$33.fact.get = function () { return new GeometryFactory() };
-
-	Object.defineProperties( NodingValidator, staticAccessors$33 );
-
-	var HotPixel = function HotPixel () {
-	  this._li = null;
-	  this._pt = null;
-	  this._originalPt = null;
-	  this._ptScaled = null;
-	  this._p0Scaled = null;
-	  this._p1Scaled = null;
-	  this._scaleFactor = null;
-	  this._minx = null;
-	  this._maxx = null;
-	  this._miny = null;
-	  this._maxy = null;
-	  this._corner = new Array(4).fill(null);
-	  this._safeEnv = null;
-	  var pt = arguments[0];
-	  var scaleFactor = arguments[1];
-	  var li = arguments[2];
-	  this._originalPt = pt;
-	  this._pt = pt;
-	  this._scaleFactor = scaleFactor;
-	  this._li = li;
-	  if (scaleFactor <= 0) { throw new IllegalArgumentException('Scale factor must be non-zero') }
-	  if (scaleFactor !== 1.0) {
-	    this._pt = new Coordinate(this.scale(pt.x), this.scale(pt.y));
-	    this._p0Scaled = new Coordinate();
-	    this._p1Scaled = new Coordinate();
-	  }
-	  this.initCorners(this._pt);
-	};
+	    (function (window, undefined$1) {
+	      var freeExports = false;
 
-	var staticAccessors$34 = { SAFE_ENV_EXPANSION_FACTOR: { configurable: true } };
-	HotPixel.prototype.intersectsScaled = function intersectsScaled (p0, p1) {
-	  var segMinx = Math.min(p0.x, p1.x);
-	  var segMaxx = Math.max(p0.x, p1.x);
-	  var segMiny = Math.min(p0.y, p1.y);
-	  var segMaxy = Math.max(p0.y, p1.y);
-	  var isOutsidePixelEnv = this._maxx < segMinx || this._minx > segMaxx || this._maxy < segMiny || this._miny > segMaxy;
-	  if (isOutsidePixelEnv) { return false }
-	  var intersects = this.intersectsToleranceSquare(p0, p1);
-	  Assert.isTrue(!(isOutsidePixelEnv && intersects), 'Found bad envelope test');
-	  return intersects
-	};
-	HotPixel.prototype.initCorners = function initCorners (pt) {
-	  var tolerance = 0.5;
-	  this._minx = pt.x - tolerance;
-	  this._maxx = pt.x + tolerance;
-	  this._miny = pt.y - tolerance;
-	  this._maxy = pt.y + tolerance;
-	  this._corner[0] = new Coordinate(this._maxx, this._maxy);
-	  this._corner[1] = new Coordinate(this._minx, this._maxy);
-	  this._corner[2] = new Coordinate(this._minx, this._miny);
-	  this._corner[3] = new Coordinate(this._maxx, this._miny);
-	};
-	HotPixel.prototype.intersects = function intersects (p0, p1) {
-	  if (this._scaleFactor === 1.0) { return this.intersectsScaled(p0, p1) }
-	  this.copyScaled(p0, this._p0Scaled);
-	  this.copyScaled(p1, this._p1Scaled);
-	  return this.intersectsScaled(this._p0Scaled, this._p1Scaled)
-	};
-	HotPixel.prototype.scale = function scale (val) {
-	  return Math.round(val * this._scaleFactor)
-	};
-	HotPixel.prototype.getCoordinate = function getCoordinate () {
-	  return this._originalPt
-	};
-	HotPixel.prototype.copyScaled = function copyScaled (p, pScaled) {
-	  pScaled.x = this.scale(p.x);
-	  pScaled.y = this.scale(p.y);
-	};
-	HotPixel.prototype.getSafeEnvelope = function getSafeEnvelope () {
-	  if (this._safeEnv === null) {
-	    var safeTolerance = HotPixel.SAFE_ENV_EXPANSION_FACTOR / this._scaleFactor;
-	    this._safeEnv = new Envelope(this._originalPt.x - safeTolerance, this._originalPt.x + safeTolerance, this._originalPt.y - safeTolerance, this._originalPt.y + safeTolerance);
-	  }
-	  return this._safeEnv
-	};
-	HotPixel.prototype.intersectsPixelClosure = function intersectsPixelClosure (p0, p1) {
-	  this._li.computeIntersection(p0, p1, this._corner[0], this._corner[1]);
-	  if (this._li.hasIntersection()) { return true }
-	  this._li.computeIntersection(p0, p1, this._corner[1], this._corner[2]);
-	  if (this._li.hasIntersection()) { return true }
-	  this._li.computeIntersection(p0, p1, this._corner[2], this._corner[3]);
-	  if (this._li.hasIntersection()) { return true }
-	  this._li.computeIntersection(p0, p1, this._corner[3], this._corner[0]);
-	  if (this._li.hasIntersection()) { return true }
-	  return false
-	};
-	HotPixel.prototype.intersectsToleranceSquare = function intersectsToleranceSquare (p0, p1) {
-	  var intersectsLeft = false;
-	  var intersectsBottom = false;
-	  this._li.computeIntersection(p0, p1, this._corner[0], this._corner[1]);
-	  if (this._li.isProper()) { return true }
-	  this._li.computeIntersection(p0, p1, this._corner[1], this._corner[2]);
-	  if (this._li.isProper()) { return true }
-	  if (this._li.hasIntersection()) { intersectsLeft = true; }
-	  this._li.computeIntersection(p0, p1, this._corner[2], this._corner[3]);
-	  if (this._li.isProper()) { return true }
-	  if (this._li.hasIntersection()) { intersectsBottom = true; }
-	  this._li.computeIntersection(p0, p1, this._corner[3], this._corner[0]);
-	  if (this._li.isProper()) { return true }
-	  if (intersectsLeft && intersectsBottom) { return true }
-	  if (p0.equals(this._pt)) { return true }
-	  if (p1.equals(this._pt)) { return true }
-	  return false
-	};
-	HotPixel.prototype.addSnappedNode = function addSnappedNode (segStr, segIndex) {
-	  var p0 = segStr.getCoordinate(segIndex);
-	  var p1 = segStr.getCoordinate(segIndex + 1);
-	  if (this.intersects(p0, p1)) {
-	    segStr.addIntersection(this.getCoordinate(), segIndex);
-	    return true
-	  }
-	  return false
-	};
-	HotPixel.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	HotPixel.prototype.getClass = function getClass () {
-	  return HotPixel
-	};
-	staticAccessors$34.SAFE_ENV_EXPANSION_FACTOR.get = function () { return 0.75 };
+	      {
+	        freeExports = exports;
+
+	        if (exports && _typeof(commonjsGlobal) === 'object' && commonjsGlobal && commonjsGlobal === commonjsGlobal.global) {
+	          window = commonjsGlobal;
+	        }
+	      }
+
+	      if (typeof undefined$1 === 'function' && _typeof(undefined$1.amd) === 'object' && undefined$1.amd) {
+	        // define as an anonymous module, so, through path mapping, it can be aliased
+	        undefined$1(function () {
+	          return Hashes;
+	        });
+	      } else if (freeExports) {
+	        // in Node.js or RingoJS v0.8.0+
+	        if (module && module.exports === freeExports) {
+	          module.exports = Hashes;
+	        } // in Narwhal or RingoJS v0.7.0-
+	        else {
+	            freeExports.Hashes = Hashes;
+	          }
+	      } else {
+	        // in a browser or Rhino
+	        window.Hashes = Hashes;
+	      }
+	    })(this);
+	  })(); // IIFE
 
-	Object.defineProperties( HotPixel, staticAccessors$34 );
+	})(hashes$1, hashes$1.exports);
 
-	var MonotoneChainSelectAction = function MonotoneChainSelectAction () {
-	  this.tempEnv1 = new Envelope();
-	  this.selectedSegment = new LineSegment();
-	};
-	MonotoneChainSelectAction.prototype.select = function select () {
-	  if (arguments.length === 1) ; else if (arguments.length === 2) {
-	    var mc = arguments[0];
-	    var startIndex = arguments[1];
-	    mc.getLineSegment(startIndex, this.selectedSegment);
-	    this.select(this.selectedSegment);
-	  }
-	};
-	MonotoneChainSelectAction.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MonotoneChainSelectAction.prototype.getClass = function getClass () {
-	  return MonotoneChainSelectAction
-	};
+	var hashes = hashes$1.exports,
+	    sha1 = new hashes.SHA1(); // # xtend
 
-	var MCIndexPointSnapper = function MCIndexPointSnapper () {
-	  this._index = null;
-	  var index = arguments[0];
-	  this._index = index;
-	};
+	var hasOwnProperty$1 = Object.prototype.hasOwnProperty;
 
-	var staticAccessors$35 = { HotPixelSnapAction: { configurable: true } };
-	MCIndexPointSnapper.prototype.snap = function snap () {
-	  if (arguments.length === 1) {
-	    var hotPixel = arguments[0];
-	    return this.snap(hotPixel, null, -1)
-	  } else if (arguments.length === 3) {
-	    var hotPixel$1 = arguments[0];
-	    var parentEdge = arguments[1];
-	    var hotPixelVertexIndex = arguments[2];
-	    var pixelEnv = hotPixel$1.getSafeEnvelope();
-	    var hotPixelSnapAction = new HotPixelSnapAction(hotPixel$1, parentEdge, hotPixelVertexIndex);
-	    this._index.query(pixelEnv, {
-	      interfaces_: function () {
-	        return [ItemVisitor]
-	      },
-	      visitItem: function (item) {
-	        var testChain = item;
-	        testChain.select(pixelEnv, hotPixelSnapAction);
-	      }
-	    });
-	    return hotPixelSnapAction.isNodeAdded()
-	  }
-	};
-	MCIndexPointSnapper.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MCIndexPointSnapper.prototype.getClass = function getClass () {
-	  return MCIndexPointSnapper
-	};
-	staticAccessors$35.HotPixelSnapAction.get = function () { return HotPixelSnapAction };
-
-	Object.defineProperties( MCIndexPointSnapper, staticAccessors$35 );
-
-	var HotPixelSnapAction = (function (MonotoneChainSelectAction$$1) {
-	  function HotPixelSnapAction () {
-	    MonotoneChainSelectAction$$1.call(this);
-	    this._hotPixel = null;
-	    this._parentEdge = null;
-	    this._hotPixelVertexIndex = null;
-	    this._isNodeAdded = false;
-	    var hotPixel = arguments[0];
-	    var parentEdge = arguments[1];
-	    var hotPixelVertexIndex = arguments[2];
-	    this._hotPixel = hotPixel;
-	    this._parentEdge = parentEdge;
-	    this._hotPixelVertexIndex = hotPixelVertexIndex;
-	  }
-
-	  if ( MonotoneChainSelectAction$$1 ) { HotPixelSnapAction.__proto__ = MonotoneChainSelectAction$$1; }
-	  HotPixelSnapAction.prototype = Object.create( MonotoneChainSelectAction$$1 && MonotoneChainSelectAction$$1.prototype );
-	  HotPixelSnapAction.prototype.constructor = HotPixelSnapAction;
-	  HotPixelSnapAction.prototype.isNodeAdded = function isNodeAdded () {
-	    return this._isNodeAdded
-	  };
-	  HotPixelSnapAction.prototype.select = function select () {
-	    if (arguments.length === 2) {
-	      var mc = arguments[0];
-	      var startIndex = arguments[1];
-	      var ss = mc.getContext();
-	      if (this._parentEdge !== null) {
-	        if (ss === this._parentEdge && startIndex === this._hotPixelVertexIndex) { return null }
-	      }
-	      this._isNodeAdded = this._hotPixel.addSnappedNode(ss, startIndex);
-	    } else { return MonotoneChainSelectAction$$1.prototype.select.apply(this, arguments) }
-	  };
-	  HotPixelSnapAction.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  HotPixelSnapAction.prototype.getClass = function getClass () {
-	    return HotPixelSnapAction
-	  };
-
-	  return HotPixelSnapAction;
-	}(MonotoneChainSelectAction));
-
-	var InteriorIntersectionFinderAdder = function InteriorIntersectionFinderAdder () {
-	  this._li = null;
-	  this._interiorIntersections = null;
-	  var li = arguments[0];
-	  this._li = li;
-	  this._interiorIntersections = new ArrayList();
-	};
-	InteriorIntersectionFinderAdder.prototype.processIntersections = function processIntersections (e0, segIndex0, e1, segIndex1) {
-	    var this$1 = this;
+	function xtend$1() {
+	  var target = {};
+
+	  for (var i = 0; i < arguments.length; i++) {
+	    var source = arguments[i];
 
-	  if (e0 === e1 && segIndex0 === segIndex1) { return null }
-	  var p00 = e0.getCoordinates()[segIndex0];
-	  var p01 = e0.getCoordinates()[segIndex0 + 1];
-	  var p10 = e1.getCoordinates()[segIndex1];
-	  var p11 = e1.getCoordinates()[segIndex1 + 1];
-	  this._li.computeIntersection(p00, p01, p10, p11);
-	  if (this._li.hasIntersection()) {
-	    if (this._li.isInteriorIntersection()) {
-	      for (var intIndex = 0; intIndex < this._li.getIntersectionNum(); intIndex++) {
-	        this$1._interiorIntersections.add(this$1._li.getIntersection(intIndex));
+	    for (var key in source) {
+	      if (hasOwnProperty$1.call(source, key)) {
+	        target[key] = source[key];
 	      }
-	      e0.addIntersections(this._li, segIndex0, 0);
-	      e1.addIntersections(this._li, segIndex1, 1);
 	    }
 	  }
-	};
-	InteriorIntersectionFinderAdder.prototype.isDone = function isDone () {
-	  return false
-	};
-	InteriorIntersectionFinderAdder.prototype.getInteriorIntersections = function getInteriorIntersections () {
-	  return this._interiorIntersections
-	};
-	InteriorIntersectionFinderAdder.prototype.interfaces_ = function interfaces_ () {
-	  return [SegmentIntersector]
-	};
-	InteriorIntersectionFinderAdder.prototype.getClass = function getClass () {
-	  return InteriorIntersectionFinderAdder
-	};
 
-	var MCIndexSnapRounder = function MCIndexSnapRounder () {
-	  this._pm = null;
-	  this._li = null;
-	  this._scaleFactor = null;
-	  this._noder = null;
-	  this._pointSnapper = null;
-	  this._nodedSegStrings = null;
-	  var pm = arguments[0];
-	  this._pm = pm;
-	  this._li = new RobustLineIntersector();
-	  this._li.setPrecisionModel(pm);
-	  this._scaleFactor = pm.getScale();
-	};
-	MCIndexSnapRounder.prototype.checkCorrectness = function checkCorrectness (inputSegmentStrings) {
-	  var resultSegStrings = NodedSegmentString.getNodedSubstrings(inputSegmentStrings);
-	  var nv = new NodingValidator(resultSegStrings);
-	  try {
-	    nv.checkValid();
-	  } catch (ex) {
-	    if (ex instanceof Exception) {
-	      ex.printStackTrace();
-	    } else { throw ex }
-	  } finally {}
-	};
-	MCIndexSnapRounder.prototype.getNodedSubstrings = function getNodedSubstrings () {
-	  return NodedSegmentString.getNodedSubstrings(this._nodedSegStrings)
-	};
-	MCIndexSnapRounder.prototype.snapRound = function snapRound (segStrings, li) {
-	  var intersections = this.findInteriorIntersections(segStrings, li);
-	  this.computeIntersectionSnaps(intersections);
-	  this.computeVertexSnaps(segStrings);
+	  return target;
+	}
+
+	var ohauth$1 = {};
+
+	ohauth$1.qsString = function (obj) {
+	  return Object.keys(obj).sort().map(function (key) {
+	    return ohauth$1.percentEncode(key) + '=' + ohauth$1.percentEncode(obj[key]);
+	  }).join('&');
 	};
-	MCIndexSnapRounder.prototype.findInteriorIntersections = function findInteriorIntersections (segStrings, li) {
-	  var intFinderAdder = new InteriorIntersectionFinderAdder(li);
-	  this._noder.setSegmentIntersector(intFinderAdder);
-	  this._noder.computeNodes(segStrings);
-	  return intFinderAdder.getInteriorIntersections()
+
+	ohauth$1.stringQs = function (str) {
+	  return str.split('&').filter(function (pair) {
+	    return pair !== '';
+	  }).reduce(function (obj, pair) {
+	    var parts = pair.split('=');
+	    obj[decodeURIComponent(parts[0])] = null === parts[1] ? '' : decodeURIComponent(parts[1]);
+	    return obj;
+	  }, {});
 	};
-	MCIndexSnapRounder.prototype.computeVertexSnaps = function computeVertexSnaps () {
-	    var this$1 = this;
 
-	  if (hasInterface(arguments[0], Collection)) {
-	    var edges = arguments[0];
-	    for (var i0 = edges.iterator(); i0.hasNext();) {
-	      var edge0 = i0.next();
-	      this$1.computeVertexSnaps(edge0);
-	    }
-	  } else if (arguments[0] instanceof NodedSegmentString) {
-	    var e = arguments[0];
-	    var pts0 = e.getCoordinates();
-	    for (var i = 0; i < pts0.length; i++) {
-	      var hotPixel = new HotPixel(pts0[i], this$1._scaleFactor, this$1._li);
-	      var isNodeAdded = this$1._pointSnapper.snap(hotPixel, e, i);
-	      if (isNodeAdded) {
-	        e.addIntersection(pts0[i], i);
-	      }
+	ohauth$1.rawxhr = function (method, url, data, headers, callback) {
+	  var xhr = new XMLHttpRequest(),
+	      twoHundred = /^20\d$/;
+
+	  xhr.onreadystatechange = function () {
+	    if (4 === xhr.readyState && 0 !== xhr.status) {
+	      if (twoHundred.test(xhr.status)) callback(null, xhr);else return callback(xhr, null);
 	    }
-	  }
-	};
-	MCIndexSnapRounder.prototype.computeNodes = function computeNodes (inputSegmentStrings) {
-	  this._nodedSegStrings = inputSegmentStrings;
-	  this._noder = new MCIndexNoder();
-	  this._pointSnapper = new MCIndexPointSnapper(this._noder.getIndex());
-	  this.snapRound(inputSegmentStrings, this._li);
-	};
-	MCIndexSnapRounder.prototype.computeIntersectionSnaps = function computeIntersectionSnaps (snapPts) {
-	    var this$1 = this;
+	  };
 
-	  for (var it = snapPts.iterator(); it.hasNext();) {
-	    var snapPt = it.next();
-	    var hotPixel = new HotPixel(snapPt, this$1._scaleFactor, this$1._li);
-	    this$1._pointSnapper.snap(hotPixel);
-	  }
-	};
-	MCIndexSnapRounder.prototype.interfaces_ = function interfaces_ () {
-	  return [Noder]
-	};
-	MCIndexSnapRounder.prototype.getClass = function getClass () {
-	  return MCIndexSnapRounder
-	};
+	  xhr.onerror = function (e) {
+	    return callback(e, null);
+	  };
 
-	var BufferOp = function BufferOp () {
-	  this._argGeom = null;
-	  this._distance = null;
-	  this._bufParams = new BufferParameters();
-	  this._resultGeometry = null;
-	  this._saveException = null;
-	  if (arguments.length === 1) {
-	    var g = arguments[0];
-	    this._argGeom = g;
-	  } else if (arguments.length === 2) {
-	    var g$1 = arguments[0];
-	    var bufParams = arguments[1];
-	    this._argGeom = g$1;
-	    this._bufParams = bufParams;
+	  xhr.open(method, url, true);
+
+	  for (var h in headers) {
+	    xhr.setRequestHeader(h, headers[h]);
 	  }
-	};
 
-	var staticAccessors$32 = { CAP_ROUND: { configurable: true },CAP_BUTT: { configurable: true },CAP_FLAT: { configurable: true },CAP_SQUARE: { configurable: true },MAX_PRECISION_DIGITS: { configurable: true } };
-	BufferOp.prototype.bufferFixedPrecision = function bufferFixedPrecision (fixedPM) {
-	  var noder = new ScaledNoder(new MCIndexSnapRounder(new PrecisionModel(1.0)), fixedPM.getScale());
-	  var bufBuilder = new BufferBuilder(this._bufParams);
-	  bufBuilder.setWorkingPrecisionModel(fixedPM);
-	  bufBuilder.setNoder(noder);
-	  this._resultGeometry = bufBuilder.buffer(this._argGeom, this._distance);
+	  xhr.send(data);
+	  return xhr;
 	};
-	BufferOp.prototype.bufferReducedPrecision = function bufferReducedPrecision () {
-	    var this$1 = this;
 
-	  if (arguments.length === 0) {
-	    for (var precDigits = BufferOp.MAX_PRECISION_DIGITS; precDigits >= 0; precDigits--) {
-	      try {
-	        this$1.bufferReducedPrecision(precDigits);
-	      } catch (ex) {
-	        if (ex instanceof TopologyException) {
-	          this$1._saveException = ex;
-	        } else { throw ex }
-	      } finally {}
-	      if (this$1._resultGeometry !== null) { return null }
-	    }
-	    throw this._saveException
-	  } else if (arguments.length === 1) {
-	    var precisionDigits = arguments[0];
-	    var sizeBasedScaleFactor = BufferOp.precisionScaleFactor(this._argGeom, this._distance, precisionDigits);
-	    var fixedPM = new PrecisionModel(sizeBasedScaleFactor);
-	    this.bufferFixedPrecision(fixedPM);
-	  }
-	};
-	BufferOp.prototype.computeGeometry = function computeGeometry () {
-	  this.bufferOriginalPrecision();
-	  if (this._resultGeometry !== null) { return null }
-	  var argPM = this._argGeom.getFactory().getPrecisionModel();
-	  if (argPM.getType() === PrecisionModel.FIXED) { this.bufferFixedPrecision(argPM); } else { this.bufferReducedPrecision(); }
-	};
-	BufferOp.prototype.setQuadrantSegments = function setQuadrantSegments (quadrantSegments) {
-	  this._bufParams.setQuadrantSegments(quadrantSegments);
-	};
-	BufferOp.prototype.bufferOriginalPrecision = function bufferOriginalPrecision () {
-	  try {
-	    var bufBuilder = new BufferBuilder(this._bufParams);
-	    this._resultGeometry = bufBuilder.buffer(this._argGeom, this._distance);
-	  } catch (ex) {
-	    if (ex instanceof RuntimeException) {
-	      this._saveException = ex;
-	    } else { throw ex }
-	  } finally {}
-	};
-	BufferOp.prototype.getResultGeometry = function getResultGeometry (distance) {
-	  this._distance = distance;
-	  this.computeGeometry();
-	  return this._resultGeometry
-	};
-	BufferOp.prototype.setEndCapStyle = function setEndCapStyle (endCapStyle) {
-	  this._bufParams.setEndCapStyle(endCapStyle);
-	};
-	BufferOp.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BufferOp.prototype.getClass = function getClass () {
-	  return BufferOp
-	};
-	BufferOp.bufferOp = function bufferOp () {
-	  if (arguments.length === 2) {
-	    var g = arguments[0];
-	    var distance = arguments[1];
-	    var gBuf = new BufferOp(g);
-	    var geomBuf = gBuf.getResultGeometry(distance);
-	    return geomBuf
-	  } else if (arguments.length === 3) {
-	    if (Number.isInteger(arguments[2]) && (arguments[0] instanceof Geometry && typeof arguments[1] === 'number')) {
-	      var g$1 = arguments[0];
-	      var distance$1 = arguments[1];
-	      var quadrantSegments = arguments[2];
-	      var bufOp = new BufferOp(g$1);
-	      bufOp.setQuadrantSegments(quadrantSegments);
-	      var geomBuf$1 = bufOp.getResultGeometry(distance$1);
-	      return geomBuf$1
-	    } else if (arguments[2] instanceof BufferParameters && (arguments[0] instanceof Geometry && typeof arguments[1] === 'number')) {
-	      var g$2 = arguments[0];
-	      var distance$2 = arguments[1];
-	      var params = arguments[2];
-	      var bufOp$1 = new BufferOp(g$2, params);
-	      var geomBuf$2 = bufOp$1.getResultGeometry(distance$2);
-	      return geomBuf$2
-	    }
-	  } else if (arguments.length === 4) {
-	    var g$3 = arguments[0];
-	    var distance$3 = arguments[1];
-	    var quadrantSegments$1 = arguments[2];
-	    var endCapStyle = arguments[3];
-	    var bufOp$2 = new BufferOp(g$3);
-	    bufOp$2.setQuadrantSegments(quadrantSegments$1);
-	    bufOp$2.setEndCapStyle(endCapStyle);
-	    var geomBuf$3 = bufOp$2.getResultGeometry(distance$3);
-	    return geomBuf$3
-	  }
-	};
-	BufferOp.precisionScaleFactor = function precisionScaleFactor (g, distance, maxPrecisionDigits) {
-	  var env = g.getEnvelopeInternal();
-	  var envMax = MathUtil.max(Math.abs(env.getMaxX()), Math.abs(env.getMaxY()), Math.abs(env.getMinX()), Math.abs(env.getMinY()));
-	  var expandByDistance = distance > 0.0 ? distance : 0.0;
-	  var bufEnvMax = envMax + 2 * expandByDistance;
-	  var bufEnvPrecisionDigits = Math.trunc(Math.log(bufEnvMax) / Math.log(10) + 1.0);
-	  var minUnitLog10 = maxPrecisionDigits - bufEnvPrecisionDigits;
-	  var scaleFactor = Math.pow(10.0, minUnitLog10);
-	  return scaleFactor
-	};
-	staticAccessors$32.CAP_ROUND.get = function () { return BufferParameters.CAP_ROUND };
-	staticAccessors$32.CAP_BUTT.get = function () { return BufferParameters.CAP_FLAT };
-	staticAccessors$32.CAP_FLAT.get = function () { return BufferParameters.CAP_FLAT };
-	staticAccessors$32.CAP_SQUARE.get = function () { return BufferParameters.CAP_SQUARE };
-	staticAccessors$32.MAX_PRECISION_DIGITS.get = function () { return 12 };
-
-	Object.defineProperties( BufferOp, staticAccessors$32 );
-
-	var PointPairDistance = function PointPairDistance () {
-	  this._pt = [new Coordinate(), new Coordinate()];
-	  this._distance = Double.NaN;
-	  this._isNull = true;
-	};
-	PointPairDistance.prototype.getCoordinates = function getCoordinates () {
-	  return this._pt
-	};
-	PointPairDistance.prototype.getCoordinate = function getCoordinate (i) {
-	  return this._pt[i]
+	ohauth$1.xhr = function (method, url, auth, data, options, callback) {
+	  var headers = options && options.header || {
+	    'Content-Type': 'application/x-www-form-urlencoded'
+	  };
+	  headers.Authorization = 'OAuth ' + ohauth$1.authHeader(auth);
+	  return ohauth$1.rawxhr(method, url, data, headers, callback);
 	};
-	PointPairDistance.prototype.setMinimum = function setMinimum () {
-	  if (arguments.length === 1) {
-	    var ptDist = arguments[0];
-	    this.setMinimum(ptDist._pt[0], ptDist._pt[1]);
-	  } else if (arguments.length === 2) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    if (this._isNull) {
-	      this.initialize(p0, p1);
-	      return null
-	    }
-	    var dist = p0.distance(p1);
-	    if (dist < this._distance) { this.initialize(p0, p1, dist); }
+
+	ohauth$1.nonce = function () {
+	  for (var o = ''; o.length < 6;) {
+	    o += '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz'[Math.floor(Math.random() * 61)];
 	  }
+
+	  return o;
 	};
-	PointPairDistance.prototype.initialize = function initialize () {
-	  if (arguments.length === 0) {
-	    this._isNull = true;
-	  } else if (arguments.length === 2) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    this._pt[0].setCoordinate(p0);
-	    this._pt[1].setCoordinate(p1);
-	    this._distance = p0.distance(p1);
-	    this._isNull = false;
-	  } else if (arguments.length === 3) {
-	    var p0$1 = arguments[0];
-	    var p1$1 = arguments[1];
-	    var distance = arguments[2];
-	    this._pt[0].setCoordinate(p0$1);
-	    this._pt[1].setCoordinate(p1$1);
-	    this._distance = distance;
-	    this._isNull = false;
-	  }
+
+	ohauth$1.authHeader = function (obj) {
+	  return Object.keys(obj).sort().map(function (key) {
+	    return encodeURIComponent(key) + '="' + encodeURIComponent(obj[key]) + '"';
+	  }).join(', ');
 	};
-	PointPairDistance.prototype.getDistance = function getDistance () {
-	  return this._distance
+
+	ohauth$1.timestamp = function () {
+	  return ~~(+new Date() / 1000);
 	};
-	PointPairDistance.prototype.setMaximum = function setMaximum () {
-	  if (arguments.length === 1) {
-	    var ptDist = arguments[0];
-	    this.setMaximum(ptDist._pt[0], ptDist._pt[1]);
-	  } else if (arguments.length === 2) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    if (this._isNull) {
-	      this.initialize(p0, p1);
-	      return null
-	    }
-	    var dist = p0.distance(p1);
-	    if (dist > this._distance) { this.initialize(p0, p1, dist); }
-	  }
+
+	ohauth$1.percentEncode = function (s) {
+	  return encodeURIComponent(s).replace(/\!/g, '%21').replace(/\'/g, '%27').replace(/\*/g, '%2A').replace(/\(/g, '%28').replace(/\)/g, '%29');
 	};
-	PointPairDistance.prototype.interfaces_ = function interfaces_ () {
-	  return []
+
+	ohauth$1.baseString = function (method, url, params) {
+	  if (params.oauth_signature) delete params.oauth_signature;
+	  return [method, ohauth$1.percentEncode(url), ohauth$1.percentEncode(ohauth$1.qsString(params))].join('&');
 	};
-	PointPairDistance.prototype.getClass = function getClass () {
-	  return PointPairDistance
+
+	ohauth$1.signature = function (oauth_secret, token_secret, baseString) {
+	  return sha1.b64_hmac(ohauth$1.percentEncode(oauth_secret) + '&' + ohauth$1.percentEncode(token_secret), baseString);
 	};
+	/**
+	 * Takes an options object for configuration (consumer_key,
+	 * consumer_secret, version, signature_method, token, token_secret)
+	 * and returns a function that generates the Authorization header
+	 * for given data.
+	 *
+	 * The returned function takes these parameters:
+	 * - method: GET/POST/...
+	 * - uri: full URI with protocol, port, path and query string
+	 * - extra_params: any extra parameters (that are passed in the POST data),
+	 *   can be an object or a from-urlencoded string.
+	 *
+	 * Returned function returns full OAuth header with "OAuth" string in it.
+	 */
 
-	var DistanceToPointFinder = function DistanceToPointFinder () {};
 
-	DistanceToPointFinder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	DistanceToPointFinder.prototype.getClass = function getClass () {
-	  return DistanceToPointFinder
-	};
-	DistanceToPointFinder.computeDistance = function computeDistance () {
-	  if (arguments[2] instanceof PointPairDistance && (arguments[0] instanceof LineString && arguments[1] instanceof Coordinate)) {
-	    var line = arguments[0];
-	    var pt = arguments[1];
-	    var ptDist = arguments[2];
-	    var coords = line.getCoordinates();
-	    var tempSegment = new LineSegment();
-	    for (var i = 0; i < coords.length - 1; i++) {
-	      tempSegment.setCoordinates(coords[i], coords[i + 1]);
-	      var closestPt = tempSegment.closestPoint(pt);
-	      ptDist.setMinimum(closestPt, pt);
-	    }
-	  } else if (arguments[2] instanceof PointPairDistance && (arguments[0] instanceof Polygon && arguments[1] instanceof Coordinate)) {
-	    var poly = arguments[0];
-	    var pt$1 = arguments[1];
-	    var ptDist$1 = arguments[2];
-	    DistanceToPointFinder.computeDistance(poly.getExteriorRing(), pt$1, ptDist$1);
-	    for (var i$1 = 0; i$1 < poly.getNumInteriorRing(); i$1++) {
-	      DistanceToPointFinder.computeDistance(poly.getInteriorRingN(i$1), pt$1, ptDist$1);
-	    }
-	  } else if (arguments[2] instanceof PointPairDistance && (arguments[0] instanceof Geometry && arguments[1] instanceof Coordinate)) {
-	    var geom = arguments[0];
-	    var pt$2 = arguments[1];
-	    var ptDist$2 = arguments[2];
-	    if (geom instanceof LineString) {
-	      DistanceToPointFinder.computeDistance(geom, pt$2, ptDist$2);
-	    } else if (geom instanceof Polygon) {
-	      DistanceToPointFinder.computeDistance(geom, pt$2, ptDist$2);
-	    } else if (geom instanceof GeometryCollection) {
-	      var gc = geom;
-	      for (var i$2 = 0; i$2 < gc.getNumGeometries(); i$2++) {
-	        var g = gc.getGeometryN(i$2);
-	        DistanceToPointFinder.computeDistance(g, pt$2, ptDist$2);
-	      }
-	    } else {
-	      ptDist$2.setMinimum(geom.getCoordinate(), pt$2);
+	ohauth$1.headerGenerator = function (options) {
+	  options = options || {};
+	  var consumer_key = options.consumer_key || '',
+	      consumer_secret = options.consumer_secret || '',
+	      signature_method = options.signature_method || 'HMAC-SHA1',
+	      version = options.version || '1.0',
+	      token = options.token || '',
+	      token_secret = options.token_secret || '';
+	  return function (method, uri, extra_params) {
+	    method = method.toUpperCase();
+
+	    if (typeof extra_params === 'string' && extra_params.length > 0) {
+	      extra_params = ohauth$1.stringQs(extra_params);
 	    }
-	  } else if (arguments[2] instanceof PointPairDistance && (arguments[0] instanceof LineSegment && arguments[1] instanceof Coordinate)) {
-	    var segment = arguments[0];
-	    var pt$3 = arguments[1];
-	    var ptDist$3 = arguments[2];
-	    var closestPt$1 = segment.closestPoint(pt$3);
-	    ptDist$3.setMinimum(closestPt$1, pt$3);
-	  }
-	};
 
-	var BufferCurveMaximumDistanceFinder = function BufferCurveMaximumDistanceFinder (inputGeom) {
-	  this._maxPtDist = new PointPairDistance();
-	  this._inputGeom = inputGeom || null;
+	    var uri_parts = uri.split('?', 2),
+	        base_uri = uri_parts[0];
+	    var query_params = uri_parts.length === 2 ? ohauth$1.stringQs(uri_parts[1]) : {};
+	    var oauth_params = {
+	      oauth_consumer_key: consumer_key,
+	      oauth_signature_method: signature_method,
+	      oauth_version: version,
+	      oauth_timestamp: ohauth$1.timestamp(),
+	      oauth_nonce: ohauth$1.nonce()
+	    };
+	    if (token) oauth_params.oauth_token = token;
+	    var all_params = xtend$1({}, oauth_params, query_params, extra_params),
+	        base_str = ohauth$1.baseString(method, base_uri, all_params);
+	    oauth_params.oauth_signature = ohauth$1.signature(consumer_secret, token_secret, base_str);
+	    return 'OAuth ' + ohauth$1.authHeader(oauth_params);
+	  };
 	};
 
-	var staticAccessors$36 = { MaxPointDistanceFilter: { configurable: true },MaxMidpointDistanceFilter: { configurable: true } };
-	BufferCurveMaximumDistanceFinder.prototype.computeMaxMidpointDistance = function computeMaxMidpointDistance (curve) {
-	  var distFilter = new MaxMidpointDistanceFilter(this._inputGeom);
-	  curve.apply(distFilter);
-	  this._maxPtDist.setMaximum(distFilter.getMaxPointDistance());
-	};
-	BufferCurveMaximumDistanceFinder.prototype.computeMaxVertexDistance = function computeMaxVertexDistance (curve) {
-	  var distFilter = new MaxPointDistanceFilter(this._inputGeom);
-	  curve.apply(distFilter);
-	  this._maxPtDist.setMaximum(distFilter.getMaxPointDistance());
-	};
-	BufferCurveMaximumDistanceFinder.prototype.findDistance = function findDistance (bufferCurve) {
-	  this.computeMaxVertexDistance(bufferCurve);
-	  this.computeMaxMidpointDistance(bufferCurve);
-	  return this._maxPtDist.getDistance()
-	};
-	BufferCurveMaximumDistanceFinder.prototype.getDistancePoints = function getDistancePoints () {
-	  return this._maxPtDist
-	};
-	BufferCurveMaximumDistanceFinder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BufferCurveMaximumDistanceFinder.prototype.getClass = function getClass () {
-	  return BufferCurveMaximumDistanceFinder
-	};
-	staticAccessors$36.MaxPointDistanceFilter.get = function () { return MaxPointDistanceFilter };
-	staticAccessors$36.MaxMidpointDistanceFilter.get = function () { return MaxMidpointDistanceFilter };
+	var ohauth_1 = ohauth$1;
 
-	Object.defineProperties( BufferCurveMaximumDistanceFinder, staticAccessors$36 );
+	var resolveUrl$1 = {exports: {}};
 
-	var MaxPointDistanceFilter = function MaxPointDistanceFilter (geom) {
-	  this._maxPtDist = new PointPairDistance();
-	  this._minPtDist = new PointPairDistance();
-	  this._geom = geom || null;
-	};
-	MaxPointDistanceFilter.prototype.filter = function filter (pt) {
-	  this._minPtDist.initialize();
-	  DistanceToPointFinder.computeDistance(this._geom, pt, this._minPtDist);
-	  this._maxPtDist.setMaximum(this._minPtDist);
-	};
-	MaxPointDistanceFilter.prototype.getMaxPointDistance = function getMaxPointDistance () {
-	  return this._maxPtDist
-	};
-	MaxPointDistanceFilter.prototype.interfaces_ = function interfaces_ () {
-	  return [CoordinateFilter]
-	};
-	MaxPointDistanceFilter.prototype.getClass = function getClass () {
-	  return MaxPointDistanceFilter
-	};
+	(function (module, exports) {
+	  // Copyright 2014 Simon Lydell
+	  // X11 (“MIT”) Licensed. (See LICENSE.)
+	  void function (root, factory) {
+	    {
+	      module.exports = factory();
+	    }
+	  }(commonjsGlobal, function () {
+	    function resolveUrl()
+	    /* ...urls */
+	    {
+	      var numUrls = arguments.length;
 
-	var MaxMidpointDistanceFilter = function MaxMidpointDistanceFilter (geom) {
-	  this._maxPtDist = new PointPairDistance();
-	  this._minPtDist = new PointPairDistance();
-	  this._geom = geom || null;
-	};
-	MaxMidpointDistanceFilter.prototype.filter = function filter (seq, index) {
-	  if (index === 0) { return null }
-	  var p0 = seq.getCoordinate(index - 1);
-	  var p1 = seq.getCoordinate(index);
-	  var midPt = new Coordinate((p0.x + p1.x) / 2, (p0.y + p1.y) / 2);
-	  this._minPtDist.initialize();
-	  DistanceToPointFinder.computeDistance(this._geom, midPt, this._minPtDist);
-	  this._maxPtDist.setMaximum(this._minPtDist);
-	};
-	MaxMidpointDistanceFilter.prototype.isDone = function isDone () {
-	  return false
-	};
-	MaxMidpointDistanceFilter.prototype.isGeometryChanged = function isGeometryChanged () {
-	  return false
-	};
-	MaxMidpointDistanceFilter.prototype.getMaxPointDistance = function getMaxPointDistance () {
-	  return this._maxPtDist
-	};
-	MaxMidpointDistanceFilter.prototype.interfaces_ = function interfaces_ () {
-	  return [CoordinateSequenceFilter]
-	};
-	MaxMidpointDistanceFilter.prototype.getClass = function getClass () {
-	  return MaxMidpointDistanceFilter
-	};
+	      if (numUrls === 0) {
+	        throw new Error("resolveUrl requires at least one argument; got none.");
+	      }
 
-	var PolygonExtracter = function PolygonExtracter (comps) {
-	  this._comps = comps || null;
-	};
-	PolygonExtracter.prototype.filter = function filter (geom) {
-	  if (geom instanceof Polygon) { this._comps.add(geom); }
-	};
-	PolygonExtracter.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryFilter]
-	};
-	PolygonExtracter.prototype.getClass = function getClass () {
-	  return PolygonExtracter
-	};
-	PolygonExtracter.getPolygons = function getPolygons () {
-	  if (arguments.length === 1) {
-	    var geom = arguments[0];
-	    return PolygonExtracter.getPolygons(geom, new ArrayList())
-	  } else if (arguments.length === 2) {
-	    var geom$1 = arguments[0];
-	    var list = arguments[1];
-	    if (geom$1 instanceof Polygon) {
-	      list.add(geom$1);
-	    } else if (geom$1 instanceof GeometryCollection) {
-	      geom$1.apply(new PolygonExtracter(list));
-	    }
-	    return list
-	  }
-	};
+	      var base = document.createElement("base");
+	      base.href = arguments[0];
 
-	var LinearComponentExtracter = function LinearComponentExtracter () {
-	  this._lines = null;
-	  this._isForcedToLineString = false;
-	  if (arguments.length === 1) {
-	    var lines = arguments[0];
-	    this._lines = lines;
-	  } else if (arguments.length === 2) {
-	    var lines$1 = arguments[0];
-	    var isForcedToLineString = arguments[1];
-	    this._lines = lines$1;
-	    this._isForcedToLineString = isForcedToLineString;
-	  }
-	};
-	LinearComponentExtracter.prototype.filter = function filter (geom) {
-	  if (this._isForcedToLineString && geom instanceof LinearRing) {
-	    var line = geom.getFactory().createLineString(geom.getCoordinateSequence());
-	    this._lines.add(line);
-	    return null
-	  }
-	  if (geom instanceof LineString) { this._lines.add(geom); }
-	};
-	LinearComponentExtracter.prototype.setForceToLineString = function setForceToLineString (isForcedToLineString) {
-	  this._isForcedToLineString = isForcedToLineString;
-	};
-	LinearComponentExtracter.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryComponentFilter]
-	};
-	LinearComponentExtracter.prototype.getClass = function getClass () {
-	  return LinearComponentExtracter
-	};
-	LinearComponentExtracter.getGeometry = function getGeometry () {
-	  if (arguments.length === 1) {
-	    var geom = arguments[0];
-	    return geom.getFactory().buildGeometry(LinearComponentExtracter.getLines(geom))
-	  } else if (arguments.length === 2) {
-	    var geom$1 = arguments[0];
-	    var forceToLineString = arguments[1];
-	    return geom$1.getFactory().buildGeometry(LinearComponentExtracter.getLines(geom$1, forceToLineString))
-	  }
-	};
-	LinearComponentExtracter.getLines = function getLines () {
-	  if (arguments.length === 1) {
-	    var geom = arguments[0];
-	    return LinearComponentExtracter.getLines(geom, false)
-	  } else if (arguments.length === 2) {
-	    if (hasInterface(arguments[0], Collection) && hasInterface(arguments[1], Collection)) {
-	      var geoms = arguments[0];
-	      var lines$1 = arguments[1];
-	      for (var i = geoms.iterator(); i.hasNext();) {
-	        var g = i.next();
-	        LinearComponentExtracter.getLines(g, lines$1);
-	      }
-	      return lines$1
-	    } else if (arguments[0] instanceof Geometry && typeof arguments[1] === 'boolean') {
-	      var geom$1 = arguments[0];
-	      var forceToLineString = arguments[1];
-	      var lines = new ArrayList();
-	      geom$1.apply(new LinearComponentExtracter(lines, forceToLineString));
-	      return lines
-	    } else if (arguments[0] instanceof Geometry && hasInterface(arguments[1], Collection)) {
-	      var geom$2 = arguments[0];
-	      var lines$2 = arguments[1];
-	      if (geom$2 instanceof LineString) {
-	        lines$2.add(geom$2);
-	      } else {
-	        geom$2.apply(new LinearComponentExtracter(lines$2));
+	      if (numUrls === 1) {
+	        return base.href;
 	      }
-	      return lines$2
-	    }
-	  } else if (arguments.length === 3) {
-	    if (typeof arguments[2] === 'boolean' && (hasInterface(arguments[0], Collection) && hasInterface(arguments[1], Collection))) {
-	      var geoms$1 = arguments[0];
-	      var lines$3 = arguments[1];
-	      var forceToLineString$1 = arguments[2];
-	      for (var i$1 = geoms$1.iterator(); i$1.hasNext();) {
-	        var g$1 = i$1.next();
-	        LinearComponentExtracter.getLines(g$1, lines$3, forceToLineString$1);
+
+	      var head = document.getElementsByTagName("head")[0];
+	      head.insertBefore(base, head.firstChild);
+	      var a = document.createElement("a");
+	      var resolved;
+
+	      for (var index = 1; index < numUrls; index++) {
+	        a.href = arguments[index];
+	        resolved = a.href;
+	        base.href = resolved;
 	      }
-	      return lines$3
-	    } else if (typeof arguments[2] === 'boolean' && (arguments[0] instanceof Geometry && hasInterface(arguments[1], Collection))) {
-	      var geom$3 = arguments[0];
-	      var lines$4 = arguments[1];
-	      var forceToLineString$2 = arguments[2];
-	      geom$3.apply(new LinearComponentExtracter(lines$4, forceToLineString$2));
-	      return lines$4
+
+	      head.removeChild(base);
+	      return resolved;
 	    }
-	  }
-	};
 
-	var PointLocator = function PointLocator () {
-	  this._boundaryRule = BoundaryNodeRule.OGC_SFS_BOUNDARY_RULE;
-	  this._isIn = null;
-	  this._numBoundaries = null;
-	  if (arguments.length === 0) ; else if (arguments.length === 1) {
-	    var boundaryRule = arguments[0];
-	    if (boundaryRule === null) { throw new IllegalArgumentException('Rule must be non-null') }
-	    this._boundaryRule = boundaryRule;
-	  }
+	    return resolveUrl;
+	  });
+	})(resolveUrl$1);
+
+	var assign = make_assign();
+	var create$1 = make_create();
+	var trim$1 = make_trim();
+	var Global$5 = typeof window !== 'undefined' ? window : commonjsGlobal;
+	var util$6 = {
+	  assign: assign,
+	  create: create$1,
+	  trim: trim$1,
+	  bind: bind$1,
+	  slice: slice$1,
+	  each: each$7,
+	  map: map,
+	  pluck: pluck$1,
+	  isList: isList$1,
+	  isFunction: isFunction$1,
+	  isObject: isObject$1,
+	  Global: Global$5
 	};
-	PointLocator.prototype.locateInternal = function locateInternal () {
-	    var this$1 = this;
-
-	  if (arguments[0] instanceof Coordinate && arguments[1] instanceof Polygon) {
-	    var p = arguments[0];
-	    var poly = arguments[1];
-	    if (poly.isEmpty()) { return Location.EXTERIOR }
-	    var shell = poly.getExteriorRing();
-	    var shellLoc = this.locateInPolygonRing(p, shell);
-	    if (shellLoc === Location.EXTERIOR) { return Location.EXTERIOR }
-	    if (shellLoc === Location.BOUNDARY) { return Location.BOUNDARY }
-	    for (var i = 0; i < poly.getNumInteriorRing(); i++) {
-	      var hole = poly.getInteriorRingN(i);
-	      var holeLoc = this$1.locateInPolygonRing(p, hole);
-	      if (holeLoc === Location.INTERIOR) { return Location.EXTERIOR }
-	      if (holeLoc === Location.BOUNDARY) { return Location.BOUNDARY }
-	    }
-	    return Location.INTERIOR
-	  } else if (arguments[0] instanceof Coordinate && arguments[1] instanceof LineString) {
-	    var p$1 = arguments[0];
-	    var l = arguments[1];
-	    if (!l.getEnvelopeInternal().intersects(p$1)) { return Location.EXTERIOR }
-	    var pt = l.getCoordinates();
-	    if (!l.isClosed()) {
-	      if (p$1.equals(pt[0]) || p$1.equals(pt[pt.length - 1])) {
-	        return Location.BOUNDARY
-	      }
-	    }
-	    if (CGAlgorithms.isOnLine(p$1, pt)) { return Location.INTERIOR }
-	    return Location.EXTERIOR
-	  } else if (arguments[0] instanceof Coordinate && arguments[1] instanceof Point$1) {
-	    var p$2 = arguments[0];
-	    var pt$1 = arguments[1];
-	    var ptCoord = pt$1.getCoordinate();
-	    if (ptCoord.equals2D(p$2)) { return Location.INTERIOR }
-	    return Location.EXTERIOR
+
+	function make_assign() {
+	  if (Object.assign) {
+	    return Object.assign;
+	  } else {
+	    return function shimAssign(obj, props1, props2, etc) {
+	      for (var i = 1; i < arguments.length; i++) {
+	        each$7(Object(arguments[i]), function (val, key) {
+	          obj[key] = val;
+	        });
+	      }
+
+	      return obj;
+	    };
 	  }
-	};
-	PointLocator.prototype.locateInPolygonRing = function locateInPolygonRing (p, ring) {
-	  if (!ring.getEnvelopeInternal().intersects(p)) { return Location.EXTERIOR }
-	  return CGAlgorithms.locatePointInRing(p, ring.getCoordinates())
-	};
-	PointLocator.prototype.intersects = function intersects (p, geom) {
-	  return this.locate(p, geom) !== Location.EXTERIOR
-	};
-	PointLocator.prototype.updateLocationInfo = function updateLocationInfo (loc) {
-	  if (loc === Location.INTERIOR) { this._isIn = true; }
-	  if (loc === Location.BOUNDARY) { this._numBoundaries++; }
-	};
-	PointLocator.prototype.computeLocation = function computeLocation (p, geom) {
-	    var this$1 = this;
-
-	  if (geom instanceof Point$1) {
-	    this.updateLocationInfo(this.locateInternal(p, geom));
-	  }
-	  if (geom instanceof LineString) {
-	    this.updateLocationInfo(this.locateInternal(p, geom));
-	  } else if (geom instanceof Polygon) {
-	    this.updateLocationInfo(this.locateInternal(p, geom));
-	  } else if (geom instanceof MultiLineString) {
-	    var ml = geom;
-	    for (var i = 0; i < ml.getNumGeometries(); i++) {
-	      var l = ml.getGeometryN(i);
-	      this$1.updateLocationInfo(this$1.locateInternal(p, l));
-	    }
-	  } else if (geom instanceof MultiPolygon) {
-	    var mpoly = geom;
-	    for (var i$1 = 0; i$1 < mpoly.getNumGeometries(); i$1++) {
-	      var poly = mpoly.getGeometryN(i$1);
-	      this$1.updateLocationInfo(this$1.locateInternal(p, poly));
-	    }
-	  } else if (geom instanceof GeometryCollection) {
-	    var geomi = new GeometryCollectionIterator(geom);
-	    while (geomi.hasNext()) {
-	      var g2 = geomi.next();
-	      if (g2 !== geom) { this$1.computeLocation(p, g2); }
-	    }
+	}
+
+	function make_create() {
+	  if (Object.create) {
+	    return function create(obj, assignProps1, assignProps2, etc) {
+	      var assignArgsList = slice$1(arguments, 1);
+	      return assign.apply(this, [Object.create(obj)].concat(assignArgsList));
+	    };
+	  } else {
+	    var F = function F() {}; // eslint-disable-line no-inner-declarations
+
+
+	    return function create(obj, assignProps1, assignProps2, etc) {
+	      var assignArgsList = slice$1(arguments, 1);
+	      F.prototype = obj;
+	      return assign.apply(this, [new F()].concat(assignArgsList));
+	    };
 	  }
-	};
-	PointLocator.prototype.locate = function locate (p, geom) {
-	  if (geom.isEmpty()) { return Location.EXTERIOR }
-	  if (geom instanceof LineString) {
-	    return this.locateInternal(p, geom)
-	  } else if (geom instanceof Polygon) {
-	    return this.locateInternal(p, geom)
-	  }
-	  this._isIn = false;
-	  this._numBoundaries = 0;
-	  this.computeLocation(p, geom);
-	  if (this._boundaryRule.isInBoundary(this._numBoundaries)) { return Location.BOUNDARY }
-	  if (this._numBoundaries > 0 || this._isIn) { return Location.INTERIOR }
-	  return Location.EXTERIOR
-	};
-	PointLocator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	PointLocator.prototype.getClass = function getClass () {
-	  return PointLocator
-	};
+	}
 
-	var GeometryLocation = function GeometryLocation () {
-	  this._component = null;
-	  this._segIndex = null;
-	  this._pt = null;
-	  if (arguments.length === 2) {
-	    var component = arguments[0];
-	    var pt = arguments[1];
-	    GeometryLocation.call(this, component, GeometryLocation.INSIDE_AREA, pt);
-	  } else if (arguments.length === 3) {
-	    var component$1 = arguments[0];
-	    var segIndex = arguments[1];
-	    var pt$1 = arguments[2];
-	    this._component = component$1;
-	    this._segIndex = segIndex;
-	    this._pt = pt$1;
+	function make_trim() {
+	  if (String.prototype.trim) {
+	    return function trim(str) {
+	      return String.prototype.trim.call(str);
+	    };
+	  } else {
+	    return function trim(str) {
+	      return str.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, '');
+	    };
 	  }
-	};
+	}
 
-	var staticAccessors$38 = { INSIDE_AREA: { configurable: true } };
-	GeometryLocation.prototype.isInsideArea = function isInsideArea () {
-	  return this._segIndex === GeometryLocation.INSIDE_AREA
-	};
-	GeometryLocation.prototype.getCoordinate = function getCoordinate () {
-	  return this._pt
-	};
-	GeometryLocation.prototype.getGeometryComponent = function getGeometryComponent () {
-	  return this._component
-	};
-	GeometryLocation.prototype.getSegmentIndex = function getSegmentIndex () {
-	  return this._segIndex
-	};
-	GeometryLocation.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryLocation.prototype.getClass = function getClass () {
-	  return GeometryLocation
-	};
-	staticAccessors$38.INSIDE_AREA.get = function () { return -1 };
+	function bind$1(obj, fn) {
+	  return function () {
+	    return fn.apply(obj, Array.prototype.slice.call(arguments, 0));
+	  };
+	}
 
-	Object.defineProperties( GeometryLocation, staticAccessors$38 );
+	function slice$1(arr, index) {
+	  return Array.prototype.slice.call(arr, index || 0);
+	}
 
-	var PointExtracter = function PointExtracter (pts) {
-	  this._pts = pts || null;
-	};
-	PointExtracter.prototype.filter = function filter (geom) {
-	  if (geom instanceof Point$1) { this._pts.add(geom); }
-	};
-	PointExtracter.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryFilter]
-	};
-	PointExtracter.prototype.getClass = function getClass () {
-	  return PointExtracter
-	};
-	PointExtracter.getPoints = function getPoints () {
-	  if (arguments.length === 1) {
-	    var geom = arguments[0];
-	    if (geom instanceof Point$1) {
-	      return Collections.singletonList(geom)
-	    }
-	    return PointExtracter.getPoints(geom, new ArrayList())
-	  } else if (arguments.length === 2) {
-	    var geom$1 = arguments[0];
-	    var list = arguments[1];
-	    if (geom$1 instanceof Point$1) {
-	      list.add(geom$1);
-	    } else if (geom$1 instanceof GeometryCollection) {
-	      geom$1.apply(new PointExtracter(list));
-	    }
-	    return list
-	  }
-	};
+	function each$7(obj, fn) {
+	  pluck$1(obj, function (val, key) {
+	    fn(val, key);
+	    return false;
+	  });
+	}
 
-	var ConnectedElementLocationFilter = function ConnectedElementLocationFilter () {
-	  this._locations = null;
-	  var locations = arguments[0];
-	  this._locations = locations;
-	};
-	ConnectedElementLocationFilter.prototype.filter = function filter (geom) {
-	  if (geom instanceof Point$1 || geom instanceof LineString || geom instanceof Polygon) { this._locations.add(new GeometryLocation(geom, 0, geom.getCoordinate())); }
-	};
-	ConnectedElementLocationFilter.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryFilter]
-	};
-	ConnectedElementLocationFilter.prototype.getClass = function getClass () {
-	  return ConnectedElementLocationFilter
-	};
-	ConnectedElementLocationFilter.getLocations = function getLocations (geom) {
-	  var locations = new ArrayList();
-	  geom.apply(new ConnectedElementLocationFilter(locations));
-	  return locations
-	};
+	function map(obj, fn) {
+	  var res = isList$1(obj) ? [] : {};
+	  pluck$1(obj, function (v, k) {
+	    res[k] = fn(v, k);
+	    return false;
+	  });
+	  return res;
+	}
 
-	var DistanceOp = function DistanceOp () {
-	  this._geom = null;
-	  this._terminateDistance = 0.0;
-	  this._ptLocator = new PointLocator();
-	  this._minDistanceLocation = null;
-	  this._minDistance = Double.MAX_VALUE;
-	  if (arguments.length === 2) {
-	    var g0 = arguments[0];
-	    var g1 = arguments[1];
-	    this._geom = [g0, g1];
-	    this._terminateDistance = 0.0;
-	  } else if (arguments.length === 3) {
-	    var g0$1 = arguments[0];
-	    var g1$1 = arguments[1];
-	    var terminateDistance = arguments[2];
-	    this._geom = new Array(2).fill(null);
-	    this._geom[0] = g0$1;
-	    this._geom[1] = g1$1;
-	    this._terminateDistance = terminateDistance;
-	  }
-	};
-	DistanceOp.prototype.computeContainmentDistance = function computeContainmentDistance () {
-	    var this$1 = this;
-
-	  if (arguments.length === 0) {
-	    var locPtPoly = new Array(2).fill(null);
-	    this.computeContainmentDistance(0, locPtPoly);
-	    if (this._minDistance <= this._terminateDistance) { return null }
-	    this.computeContainmentDistance(1, locPtPoly);
-	  } else if (arguments.length === 2) {
-	    var polyGeomIndex = arguments[0];
-	    var locPtPoly$1 = arguments[1];
-	    var locationsIndex = 1 - polyGeomIndex;
-	    var polys = PolygonExtracter.getPolygons(this._geom[polyGeomIndex]);
-	    if (polys.size() > 0) {
-	      var insideLocs = ConnectedElementLocationFilter.getLocations(this._geom[locationsIndex]);
-	      this.computeContainmentDistance(insideLocs, polys, locPtPoly$1);
-	      if (this._minDistance <= this._terminateDistance) {
-	        this._minDistanceLocation[locationsIndex] = locPtPoly$1[0];
-	        this._minDistanceLocation[polyGeomIndex] = locPtPoly$1[1];
-	        return null
-	      }
-	    }
-	  } else if (arguments.length === 3) {
-	    if (arguments[2] instanceof Array && (hasInterface(arguments[0], List) && hasInterface(arguments[1], List))) {
-	      var locs = arguments[0];
-	      var polys$1 = arguments[1];
-	      var locPtPoly$2 = arguments[2];
-	      for (var i = 0; i < locs.size(); i++) {
-	        var loc = locs.get(i);
-	        for (var j = 0; j < polys$1.size(); j++) {
-	          this$1.computeContainmentDistance(loc, polys$1.get(j), locPtPoly$2);
-	          if (this$1._minDistance <= this$1._terminateDistance) { return null }
-	        }
-	      }
-	    } else if (arguments[2] instanceof Array && (arguments[0] instanceof GeometryLocation && arguments[1] instanceof Polygon)) {
-	      var ptLoc = arguments[0];
-	      var poly = arguments[1];
-	      var locPtPoly$3 = arguments[2];
-	      var pt = ptLoc.getCoordinate();
-	      if (Location.EXTERIOR !== this._ptLocator.locate(pt, poly)) {
-	        this._minDistance = 0.0;
-	        locPtPoly$3[0] = ptLoc;
-	        locPtPoly$3[1] = new GeometryLocation(poly, pt);
-
-	        return null
+	function pluck$1(obj, fn) {
+	  if (isList$1(obj)) {
+	    for (var i = 0; i < obj.length; i++) {
+	      if (fn(obj[i], i)) {
+	        return obj[i];
 	      }
 	    }
-	  }
-	};
-	DistanceOp.prototype.computeMinDistanceLinesPoints = function computeMinDistanceLinesPoints (lines, points, locGeom) {
-	    var this$1 = this;
-
-	  for (var i = 0; i < lines.size(); i++) {
-	    var line = lines.get(i);
-	    for (var j = 0; j < points.size(); j++) {
-	      var pt = points.get(j);
-	      this$1.computeMinDistance(line, pt, locGeom);
-	      if (this$1._minDistance <= this$1._terminateDistance) { return null }
-	    }
-	  }
-	};
-	DistanceOp.prototype.computeFacetDistance = function computeFacetDistance () {
-	  var locGeom = new Array(2).fill(null);
-	  var lines0 = LinearComponentExtracter.getLines(this._geom[0]);
-	  var lines1 = LinearComponentExtracter.getLines(this._geom[1]);
-	  var pts0 = PointExtracter.getPoints(this._geom[0]);
-	  var pts1 = PointExtracter.getPoints(this._geom[1]);
-	  this.computeMinDistanceLines(lines0, lines1, locGeom);
-	  this.updateMinDistance(locGeom, false);
-	  if (this._minDistance <= this._terminateDistance) { return null }
-	  locGeom[0] = null;
-	  locGeom[1] = null;
-	  this.computeMinDistanceLinesPoints(lines0, pts1, locGeom);
-	  this.updateMinDistance(locGeom, false);
-	  if (this._minDistance <= this._terminateDistance) { return null }
-	  locGeom[0] = null;
-	  locGeom[1] = null;
-	  this.computeMinDistanceLinesPoints(lines1, pts0, locGeom);
-	  this.updateMinDistance(locGeom, true);
-	  if (this._minDistance <= this._terminateDistance) { return null }
-	  locGeom[0] = null;
-	  locGeom[1] = null;
-	  this.computeMinDistancePoints(pts0, pts1, locGeom);
-	  this.updateMinDistance(locGeom, false);
-	};
-	DistanceOp.prototype.nearestLocations = function nearestLocations () {
-	  this.computeMinDistance();
-	  return this._minDistanceLocation
-	};
-	DistanceOp.prototype.updateMinDistance = function updateMinDistance (locGeom, flip) {
-	  if (locGeom[0] === null) { return null }
-	  if (flip) {
-	    this._minDistanceLocation[0] = locGeom[1];
-	    this._minDistanceLocation[1] = locGeom[0];
 	  } else {
-	    this._minDistanceLocation[0] = locGeom[0];
-	    this._minDistanceLocation[1] = locGeom[1];
-	  }
-	};
-	DistanceOp.prototype.nearestPoints = function nearestPoints () {
-	  this.computeMinDistance();
-	  var nearestPts = [this._minDistanceLocation[0].getCoordinate(), this._minDistanceLocation[1].getCoordinate()];
-	  return nearestPts
-	};
-	DistanceOp.prototype.computeMinDistance = function computeMinDistance () {
-	    var this$1 = this;
-
-	  if (arguments.length === 0) {
-	    if (this._minDistanceLocation !== null) { return null }
-	    this._minDistanceLocation = new Array(2).fill(null);
-	    this.computeContainmentDistance();
-	    if (this._minDistance <= this._terminateDistance) { return null }
-	    this.computeFacetDistance();
-	  } else if (arguments.length === 3) {
-	    if (arguments[2] instanceof Array && (arguments[0] instanceof LineString && arguments[1] instanceof Point$1)) {
-	      var line = arguments[0];
-	      var pt = arguments[1];
-	      var locGeom = arguments[2];
-	      if (line.getEnvelopeInternal().distance(pt.getEnvelopeInternal()) > this._minDistance) { return null }
-	      var coord0 = line.getCoordinates();
-	      var coord = pt.getCoordinate();
-	      for (var i = 0; i < coord0.length - 1; i++) {
-	        var dist = CGAlgorithms.distancePointLine(coord, coord0[i], coord0[i + 1]);
-	        if (dist < this$1._minDistance) {
-	          this$1._minDistance = dist;
-	          var seg = new LineSegment(coord0[i], coord0[i + 1]);
-	          var segClosestPoint = seg.closestPoint(coord);
-	          locGeom[0] = new GeometryLocation(line, i, segClosestPoint);
-	          locGeom[1] = new GeometryLocation(pt, 0, coord);
-	        }
-	        if (this$1._minDistance <= this$1._terminateDistance) { return null }
-	      }
-	    } else if (arguments[2] instanceof Array && (arguments[0] instanceof LineString && arguments[1] instanceof LineString)) {
-	      var line0 = arguments[0];
-	      var line1 = arguments[1];
-	      var locGeom$1 = arguments[2];
-	      if (line0.getEnvelopeInternal().distance(line1.getEnvelopeInternal()) > this._minDistance) { return null }
-	      var coord0$1 = line0.getCoordinates();
-	      var coord1 = line1.getCoordinates();
-	      for (var i$1 = 0; i$1 < coord0$1.length - 1; i$1++) {
-	        for (var j = 0; j < coord1.length - 1; j++) {
-	          var dist$1 = CGAlgorithms.distanceLineLine(coord0$1[i$1], coord0$1[i$1 + 1], coord1[j], coord1[j + 1]);
-	          if (dist$1 < this$1._minDistance) {
-	            this$1._minDistance = dist$1;
-	            var seg0 = new LineSegment(coord0$1[i$1], coord0$1[i$1 + 1]);
-	            var seg1 = new LineSegment(coord1[j], coord1[j + 1]);
-	            var closestPt = seg0.closestPoints(seg1);
-	            locGeom$1[0] = new GeometryLocation(line0, i$1, closestPt[0]);
-	            locGeom$1[1] = new GeometryLocation(line1, j, closestPt[1]);
-	          }
-	          if (this$1._minDistance <= this$1._terminateDistance) { return null }
+	    for (var key in obj) {
+	      if (obj.hasOwnProperty(key)) {
+	        if (fn(obj[key], key)) {
+	          return obj[key];
 	        }
 	      }
 	    }
 	  }
-	};
-	DistanceOp.prototype.computeMinDistancePoints = function computeMinDistancePoints (points0, points1, locGeom) {
-	    var this$1 = this;
+	}
 
-	  for (var i = 0; i < points0.size(); i++) {
-	    var pt0 = points0.get(i);
-	    for (var j = 0; j < points1.size(); j++) {
-	      var pt1 = points1.get(j);
-	      var dist = pt0.getCoordinate().distance(pt1.getCoordinate());
-	      if (dist < this$1._minDistance) {
-	        this$1._minDistance = dist;
-	        locGeom[0] = new GeometryLocation(pt0, 0, pt0.getCoordinate());
-	        locGeom[1] = new GeometryLocation(pt1, 0, pt1.getCoordinate());
-	      }
-	      if (this$1._minDistance <= this$1._terminateDistance) { return null }
+	function isList$1(val) {
+	  return val != null && typeof val != 'function' && typeof val.length == 'number';
+	}
+
+	function isFunction$1(val) {
+	  return val && {}.toString.call(val) === '[object Function]';
+	}
+
+	function isObject$1(val) {
+	  return val && {}.toString.call(val) === '[object Object]';
+	}
+
+	var util$5 = util$6;
+	var slice = util$5.slice;
+	var pluck = util$5.pluck;
+	var each$6 = util$5.each;
+	var bind = util$5.bind;
+	var create = util$5.create;
+	var isList = util$5.isList;
+	var isFunction = util$5.isFunction;
+	var isObject = util$5.isObject;
+	var storeEngine = {
+	  createStore: _createStore
+	};
+	var storeAPI = {
+	  version: '2.0.12',
+	  enabled: false,
+	  // get returns the value of the given key. If that value
+	  // is undefined, it returns optionalDefaultValue instead.
+	  get: function get(key, optionalDefaultValue) {
+	    var data = this.storage.read(this._namespacePrefix + key);
+	    return this._deserialize(data, optionalDefaultValue);
+	  },
+	  // set will store the given value at key and returns value.
+	  // Calling set with value === undefined is equivalent to calling remove.
+	  set: function set(key, value) {
+	    if (value === undefined) {
+	      return this.remove(key);
 	    }
+
+	    this.storage.write(this._namespacePrefix + key, this._serialize(value));
+	    return value;
+	  },
+	  // remove deletes the key and value stored at the given key.
+	  remove: function remove(key) {
+	    this.storage.remove(this._namespacePrefix + key);
+	  },
+	  // each will call the given callback once for each key-value pair
+	  // in this store.
+	  each: function each(callback) {
+	    var self = this;
+	    this.storage.each(function (val, namespacedKey) {
+	      callback.call(self, self._deserialize(val), (namespacedKey || '').replace(self._namespaceRegexp, ''));
+	    });
+	  },
+	  // clearAll will remove all the stored key-value pairs in this store.
+	  clearAll: function clearAll() {
+	    this.storage.clearAll();
+	  },
+	  // additional functionality that can't live in plugins
+	  // ---------------------------------------------------
+	  // hasNamespace returns true if this store instance has the given namespace.
+	  hasNamespace: function hasNamespace(namespace) {
+	    return this._namespacePrefix == '__storejs_' + namespace + '_';
+	  },
+	  // createStore creates a store.js instance with the first
+	  // functioning storage in the list of storage candidates,
+	  // and applies the the given mixins to the instance.
+	  createStore: function createStore() {
+	    return _createStore.apply(this, arguments);
+	  },
+	  addPlugin: function addPlugin(plugin) {
+	    this._addPlugin(plugin);
+	  },
+	  namespace: function namespace(_namespace) {
+	    return _createStore(this.storage, this.plugins, _namespace);
 	  }
 	};
-	DistanceOp.prototype.distance = function distance () {
-	  if (this._geom[0] === null || this._geom[1] === null) { throw new IllegalArgumentException('null geometries are not supported') }
-	  if (this._geom[0].isEmpty() || this._geom[1].isEmpty()) { return 0.0 }
-	  this.computeMinDistance();
-	  return this._minDistance
-	};
-	DistanceOp.prototype.computeMinDistanceLines = function computeMinDistanceLines (lines0, lines1, locGeom) {
-	    var this$1 = this;
 
-	  for (var i = 0; i < lines0.size(); i++) {
-	    var line0 = lines0.get(i);
-	    for (var j = 0; j < lines1.size(); j++) {
-	      var line1 = lines1.get(j);
-	      this$1.computeMinDistance(line0, line1, locGeom);
-	      if (this$1._minDistance <= this$1._terminateDistance) { return null }
-	    }
+	function _warn() {
+	  var _console = typeof console == 'undefined' ? null : console;
+
+	  if (!_console) {
+	    return;
 	  }
-	};
-	DistanceOp.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	DistanceOp.prototype.getClass = function getClass () {
-	  return DistanceOp
-	};
-	DistanceOp.distance = function distance (g0, g1) {
-	  var distOp = new DistanceOp(g0, g1);
-	  return distOp.distance()
-	};
-	DistanceOp.isWithinDistance = function isWithinDistance (g0, g1, distance) {
-	  var distOp = new DistanceOp(g0, g1, distance);
-	  return distOp.distance() <= distance
-	};
-	DistanceOp.nearestPoints = function nearestPoints (g0, g1) {
-	  var distOp = new DistanceOp(g0, g1);
-	  return distOp.nearestPoints()
-	};
 
-	var PointPairDistance$2 = function PointPairDistance () {
-	  this._pt = [new Coordinate(), new Coordinate()];
-	  this._distance = Double.NaN;
-	  this._isNull = true;
-	};
-	PointPairDistance$2.prototype.getCoordinates = function getCoordinates () {
-	  return this._pt
-	};
-	PointPairDistance$2.prototype.getCoordinate = function getCoordinate (i) {
-	  return this._pt[i]
-	};
-	PointPairDistance$2.prototype.setMinimum = function setMinimum () {
-	  if (arguments.length === 1) {
-	    var ptDist = arguments[0];
-	    this.setMinimum(ptDist._pt[0], ptDist._pt[1]);
-	  } else if (arguments.length === 2) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    if (this._isNull) {
-	      this.initialize(p0, p1);
-	      return null
-	    }
-	    var dist = p0.distance(p1);
-	    if (dist < this._distance) { this.initialize(p0, p1, dist); }
+	  var fn = _console.warn ? _console.warn : _console.log;
+	  fn.apply(_console, arguments);
+	}
+
+	function _createStore(storages, plugins, namespace) {
+	  if (!namespace) {
+	    namespace = '';
 	  }
-	};
-	PointPairDistance$2.prototype.initialize = function initialize () {
-	  if (arguments.length === 0) {
-	    this._isNull = true;
-	  } else if (arguments.length === 2) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    this._pt[0].setCoordinate(p0);
-	    this._pt[1].setCoordinate(p1);
-	    this._distance = p0.distance(p1);
-	    this._isNull = false;
-	  } else if (arguments.length === 3) {
-	    var p0$1 = arguments[0];
-	    var p1$1 = arguments[1];
-	    var distance = arguments[2];
-	    this._pt[0].setCoordinate(p0$1);
-	    this._pt[1].setCoordinate(p1$1);
-	    this._distance = distance;
-	    this._isNull = false;
+
+	  if (storages && !isList(storages)) {
+	    storages = [storages];
 	  }
-	};
-	PointPairDistance$2.prototype.toString = function toString () {
-	  return WKTWriter.toLineString(this._pt[0], this._pt[1])
-	};
-	PointPairDistance$2.prototype.getDistance = function getDistance () {
-	  return this._distance
-	};
-	PointPairDistance$2.prototype.setMaximum = function setMaximum () {
-	  if (arguments.length === 1) {
-	    var ptDist = arguments[0];
-	    this.setMaximum(ptDist._pt[0], ptDist._pt[1]);
-	  } else if (arguments.length === 2) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    if (this._isNull) {
-	      this.initialize(p0, p1);
-	      return null
-	    }
-	    var dist = p0.distance(p1);
-	    if (dist > this._distance) { this.initialize(p0, p1, dist); }
+
+	  if (plugins && !isList(plugins)) {
+	    plugins = [plugins];
 	  }
-	};
-	PointPairDistance$2.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	PointPairDistance$2.prototype.getClass = function getClass () {
-	  return PointPairDistance$2
-	};
 
-	var DistanceToPoint = function DistanceToPoint () {};
+	  var namespacePrefix = namespace ? '__storejs_' + namespace + '_' : '';
+	  var namespaceRegexp = namespace ? new RegExp('^' + namespacePrefix) : null;
+	  var legalNamespaces = /^[a-zA-Z0-9_\-]*$/; // alpha-numeric + underscore and dash
 
-	DistanceToPoint.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	DistanceToPoint.prototype.getClass = function getClass () {
-	  return DistanceToPoint
-	};
-	DistanceToPoint.computeDistance = function computeDistance () {
-	  if (arguments[2] instanceof PointPairDistance$2 && (arguments[0] instanceof LineString && arguments[1] instanceof Coordinate)) {
-	    var line = arguments[0];
-	    var pt = arguments[1];
-	    var ptDist = arguments[2];
-	    var tempSegment = new LineSegment();
-	    var coords = line.getCoordinates();
-	    for (var i = 0; i < coords.length - 1; i++) {
-	      tempSegment.setCoordinates(coords[i], coords[i + 1]);
-	      var closestPt = tempSegment.closestPoint(pt);
-	      ptDist.setMinimum(closestPt, pt);
-	    }
-	  } else if (arguments[2] instanceof PointPairDistance$2 && (arguments[0] instanceof Polygon && arguments[1] instanceof Coordinate)) {
-	    var poly = arguments[0];
-	    var pt$1 = arguments[1];
-	    var ptDist$1 = arguments[2];
-	    DistanceToPoint.computeDistance(poly.getExteriorRing(), pt$1, ptDist$1);
-	    for (var i$1 = 0; i$1 < poly.getNumInteriorRing(); i$1++) {
-	      DistanceToPoint.computeDistance(poly.getInteriorRingN(i$1), pt$1, ptDist$1);
-	    }
-	  } else if (arguments[2] instanceof PointPairDistance$2 && (arguments[0] instanceof Geometry && arguments[1] instanceof Coordinate)) {
-	    var geom = arguments[0];
-	    var pt$2 = arguments[1];
-	    var ptDist$2 = arguments[2];
-	    if (geom instanceof LineString) {
-	      DistanceToPoint.computeDistance(geom, pt$2, ptDist$2);
-	    } else if (geom instanceof Polygon) {
-	      DistanceToPoint.computeDistance(geom, pt$2, ptDist$2);
-	    } else if (geom instanceof GeometryCollection) {
-	      var gc = geom;
-	      for (var i$2 = 0; i$2 < gc.getNumGeometries(); i$2++) {
-	        var g = gc.getGeometryN(i$2);
-	        DistanceToPoint.computeDistance(g, pt$2, ptDist$2);
+	  if (!legalNamespaces.test(namespace)) {
+	    throw new Error('store.js namespaces can only have alphanumerics + underscores and dashes');
+	  }
+
+	  var _privateStoreProps = {
+	    _namespacePrefix: namespacePrefix,
+	    _namespaceRegexp: namespaceRegexp,
+	    _testStorage: function _testStorage(storage) {
+	      try {
+	        var testStr = '__storejs__test__';
+	        storage.write(testStr, testStr);
+	        var ok = storage.read(testStr) === testStr;
+	        storage.remove(testStr);
+	        return ok;
+	      } catch (e) {
+	        return false;
 	      }
-	    } else {
-	      ptDist$2.setMinimum(geom.getCoordinate(), pt$2);
+	    },
+	    _assignPluginFnProp: function _assignPluginFnProp(pluginFnProp, propName) {
+	      var oldFn = this[propName];
+
+	      this[propName] = function pluginFn() {
+	        var args = slice(arguments, 0);
+	        var self = this; // super_fn calls the old function which was overwritten by
+	        // this mixin.
+
+	        function super_fn() {
+	          if (!oldFn) {
+	            return;
+	          }
+
+	          each$6(arguments, function (arg, i) {
+	            args[i] = arg;
+	          });
+	          return oldFn.apply(self, args);
+	        } // Give mixing function access to super_fn by prefixing all mixin function
+	        // arguments with super_fn.
+
+
+	        var newFnArgs = [super_fn].concat(args);
+	        return pluginFnProp.apply(self, newFnArgs);
+	      };
+	    },
+	    _serialize: function _serialize(obj) {
+	      return JSON.stringify(obj);
+	    },
+	    _deserialize: function _deserialize(strVal, defaultVal) {
+	      if (!strVal) {
+	        return defaultVal;
+	      } // It is possible that a raw string value has been previously stored
+	      // in a storage without using store.js, meaning it will be a raw
+	      // string value instead of a JSON serialized string. By defaulting
+	      // to the raw string value in case of a JSON parse error, we allow
+	      // for past stored values to be forwards-compatible with store.js
+
+
+	      var val = '';
+
+	      try {
+	        val = JSON.parse(strVal);
+	      } catch (e) {
+	        val = strVal;
+	      }
+
+	      return val !== undefined ? val : defaultVal;
+	    },
+	    _addStorage: function _addStorage(storage) {
+	      if (this.enabled) {
+	        return;
+	      }
+
+	      if (this._testStorage(storage)) {
+	        this.storage = storage;
+	        this.enabled = true;
+	      }
+	    },
+	    _addPlugin: function _addPlugin(plugin) {
+	      var self = this; // If the plugin is an array, then add all plugins in the array.
+	      // This allows for a plugin to depend on other plugins.
+
+	      if (isList(plugin)) {
+	        each$6(plugin, function (plugin) {
+	          self._addPlugin(plugin);
+	        });
+	        return;
+	      } // Keep track of all plugins we've seen so far, so that we
+	      // don't add any of them twice.
+
+
+	      var seenPlugin = pluck(this.plugins, function (seenPlugin) {
+	        return plugin === seenPlugin;
+	      });
+
+	      if (seenPlugin) {
+	        return;
+	      }
+
+	      this.plugins.push(plugin); // Check that the plugin is properly formed
+
+	      if (!isFunction(plugin)) {
+	        throw new Error('Plugins must be function values that return objects');
+	      }
+
+	      var pluginProperties = plugin.call(this);
+
+	      if (!isObject(pluginProperties)) {
+	        throw new Error('Plugins must return an object of function properties');
+	      } // Add the plugin function properties to this store instance.
+
+
+	      each$6(pluginProperties, function (pluginFnProp, propName) {
+	        if (!isFunction(pluginFnProp)) {
+	          throw new Error('Bad plugin property: ' + propName + ' from plugin ' + plugin.name + '. Plugins should only return functions.');
+	        }
+
+	        self._assignPluginFnProp(pluginFnProp, propName);
+	      });
+	    },
+	    // Put deprecated properties in the private API, so as to not expose it to accidential
+	    // discovery through inspection of the store object.
+	    // Deprecated: addStorage
+	    addStorage: function addStorage(storage) {
+	      _warn('store.addStorage(storage) is deprecated. Use createStore([storages])');
+
+	      this._addStorage(storage);
 	    }
-	  } else if (arguments[2] instanceof PointPairDistance$2 && (arguments[0] instanceof LineSegment && arguments[1] instanceof Coordinate)) {
-	    var segment = arguments[0];
-	    var pt$3 = arguments[1];
-	    var ptDist$3 = arguments[2];
-	    var closestPt$1 = segment.closestPoint(pt$3);
-	    ptDist$3.setMinimum(closestPt$1, pt$3);
-	  }
-	};
+	  };
+	  var store = create(_privateStoreProps, storeAPI, {
+	    plugins: []
+	  });
+	  store.raw = {};
+	  each$6(store, function (prop, propName) {
+	    if (isFunction(prop)) {
+	      store.raw[propName] = bind(store, prop);
+	    }
+	  });
+	  each$6(storages, function (storage) {
+	    store._addStorage(storage);
+	  });
+	  each$6(plugins, function (plugin) {
+	    store._addPlugin(plugin);
+	  });
+	  return store;
+	}
 
-	var DiscreteHausdorffDistance = function DiscreteHausdorffDistance () {
-	  this._g0 = null;
-	  this._g1 = null;
-	  this._ptDist = new PointPairDistance$2();
-	  this._densifyFrac = 0.0;
-	  var g0 = arguments[0];
-	  var g1 = arguments[1];
-	  this._g0 = g0;
-	  this._g1 = g1;
+	var util$4 = util$6;
+	var Global$4 = util$4.Global;
+	var localStorage_1 = {
+	  name: 'localStorage',
+	  read: read$5,
+	  write: write$5,
+	  each: each$5,
+	  remove: remove$5,
+	  clearAll: clearAll$5
 	};
 
-	var staticAccessors$39 = { MaxPointDistanceFilter: { configurable: true },MaxDensifiedByFractionDistanceFilter: { configurable: true } };
-	DiscreteHausdorffDistance.prototype.getCoordinates = function getCoordinates () {
-	  return this._ptDist.getCoordinates()
-	};
-	DiscreteHausdorffDistance.prototype.setDensifyFraction = function setDensifyFraction (densifyFrac) {
-	  if (densifyFrac > 1.0 || densifyFrac <= 0.0) { throw new IllegalArgumentException('Fraction is not in range (0.0 - 1.0]') }
-	  this._densifyFrac = densifyFrac;
-	};
-	DiscreteHausdorffDistance.prototype.compute = function compute (g0, g1) {
-	  this.computeOrientedDistance(g0, g1, this._ptDist);
-	  this.computeOrientedDistance(g1, g0, this._ptDist);
-	};
-	DiscreteHausdorffDistance.prototype.distance = function distance () {
-	  this.compute(this._g0, this._g1);
-	  return this._ptDist.getDistance()
-	};
-	DiscreteHausdorffDistance.prototype.computeOrientedDistance = function computeOrientedDistance (discreteGeom, geom, ptDist) {
-	  var distFilter = new MaxPointDistanceFilter$1(geom);
-	  discreteGeom.apply(distFilter);
-	  ptDist.setMaximum(distFilter.getMaxPointDistance());
-	  if (this._densifyFrac > 0) {
-	    var fracFilter = new MaxDensifiedByFractionDistanceFilter(geom, this._densifyFrac);
-	    discreteGeom.apply(fracFilter);
-	    ptDist.setMaximum(fracFilter.getMaxPointDistance());
-	  }
-	};
-	DiscreteHausdorffDistance.prototype.orientedDistance = function orientedDistance () {
-	  this.computeOrientedDistance(this._g0, this._g1, this._ptDist);
-	  return this._ptDist.getDistance()
-	};
-	DiscreteHausdorffDistance.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	DiscreteHausdorffDistance.prototype.getClass = function getClass () {
-	  return DiscreteHausdorffDistance
-	};
-	DiscreteHausdorffDistance.distance = function distance () {
-	  if (arguments.length === 2) {
-	    var g0 = arguments[0];
-	    var g1 = arguments[1];
-	    var dist = new DiscreteHausdorffDistance(g0, g1);
-	    return dist.distance()
-	  } else if (arguments.length === 3) {
-	    var g0$1 = arguments[0];
-	    var g1$1 = arguments[1];
-	    var densifyFrac = arguments[2];
-	    var dist$1 = new DiscreteHausdorffDistance(g0$1, g1$1);
-	    dist$1.setDensifyFraction(densifyFrac);
-	    return dist$1.distance()
-	  }
-	};
-	staticAccessors$39.MaxPointDistanceFilter.get = function () { return MaxPointDistanceFilter$1 };
-	staticAccessors$39.MaxDensifiedByFractionDistanceFilter.get = function () { return MaxDensifiedByFractionDistanceFilter };
-
-	Object.defineProperties( DiscreteHausdorffDistance, staticAccessors$39 );
-
-	var MaxPointDistanceFilter$1 = function MaxPointDistanceFilter () {
-	  this._maxPtDist = new PointPairDistance$2();
-	  this._minPtDist = new PointPairDistance$2();
-	  this._euclideanDist = new DistanceToPoint();
-	  this._geom = null;
-	  var geom = arguments[0];
-	  this._geom = geom;
-	};
-	MaxPointDistanceFilter$1.prototype.filter = function filter (pt) {
-	  this._minPtDist.initialize();
-	  DistanceToPoint.computeDistance(this._geom, pt, this._minPtDist);
-	  this._maxPtDist.setMaximum(this._minPtDist);
-	};
-	MaxPointDistanceFilter$1.prototype.getMaxPointDistance = function getMaxPointDistance () {
-	  return this._maxPtDist
-	};
-	MaxPointDistanceFilter$1.prototype.interfaces_ = function interfaces_ () {
-	  return [CoordinateFilter]
-	};
-	MaxPointDistanceFilter$1.prototype.getClass = function getClass () {
-	  return MaxPointDistanceFilter$1
-	};
+	function localStorage$1() {
+	  return Global$4.localStorage;
+	}
 
-	var MaxDensifiedByFractionDistanceFilter = function MaxDensifiedByFractionDistanceFilter () {
-	  this._maxPtDist = new PointPairDistance$2();
-	  this._minPtDist = new PointPairDistance$2();
-	  this._geom = null;
-	  this._numSubSegs = 0;
-	  var geom = arguments[0];
-	  var fraction = arguments[1];
-	  this._geom = geom;
-	  this._numSubSegs = Math.trunc(Math.round(1.0 / fraction));
-	};
-	MaxDensifiedByFractionDistanceFilter.prototype.filter = function filter (seq, index) {
-	    var this$1 = this;
-
-	  if (index === 0) { return null }
-	  var p0 = seq.getCoordinate(index - 1);
-	  var p1 = seq.getCoordinate(index);
-	  var delx = (p1.x - p0.x) / this._numSubSegs;
-	  var dely = (p1.y - p0.y) / this._numSubSegs;
-	  for (var i = 0; i < this._numSubSegs; i++) {
-	    var x = p0.x + i * delx;
-	    var y = p0.y + i * dely;
-	    var pt = new Coordinate(x, y);
-	    this$1._minPtDist.initialize();
-	    DistanceToPoint.computeDistance(this$1._geom, pt, this$1._minPtDist);
-	    this$1._maxPtDist.setMaximum(this$1._minPtDist);
+	function read$5(key) {
+	  return localStorage$1().getItem(key);
+	}
+
+	function write$5(key, data) {
+	  return localStorage$1().setItem(key, data);
+	}
+
+	function each$5(fn) {
+	  for (var i = localStorage$1().length - 1; i >= 0; i--) {
+	    var key = localStorage$1().key(i);
+	    fn(read$5(key), key);
 	  }
-	};
-	MaxDensifiedByFractionDistanceFilter.prototype.isDone = function isDone () {
-	  return false
-	};
-	MaxDensifiedByFractionDistanceFilter.prototype.isGeometryChanged = function isGeometryChanged () {
-	  return false
-	};
-	MaxDensifiedByFractionDistanceFilter.prototype.getMaxPointDistance = function getMaxPointDistance () {
-	  return this._maxPtDist
-	};
-	MaxDensifiedByFractionDistanceFilter.prototype.interfaces_ = function interfaces_ () {
-	  return [CoordinateSequenceFilter]
-	};
-	MaxDensifiedByFractionDistanceFilter.prototype.getClass = function getClass () {
-	  return MaxDensifiedByFractionDistanceFilter
-	};
+	}
+
+	function remove$5(key) {
+	  return localStorage$1().removeItem(key);
+	}
+
+	function clearAll$5() {
+	  return localStorage$1().clear();
+	}
+
+	// versions 6 and 7, where no localStorage, etc
+	// is available.
 
-	var BufferDistanceValidator = function BufferDistanceValidator (input, bufDistance, result) {
-	  this._minValidDistance = null;
-	  this._maxValidDistance = null;
-	  this._minDistanceFound = null;
-	  this._maxDistanceFound = null;
-	  this._isValid = true;
-	  this._errMsg = null;
-	  this._errorLocation = null;
-	  this._errorIndicator = null;
-	  this._input = input || null;
-	  this._bufDistance = bufDistance || null;
-	  this._result = result || null;
+	var util$3 = util$6;
+	var Global$3 = util$3.Global;
+	var oldFFGlobalStorage = {
+	  name: 'oldFF-globalStorage',
+	  read: read$4,
+	  write: write$4,
+	  each: each$4,
+	  remove: remove$4,
+	  clearAll: clearAll$4
 	};
+	var globalStorage = Global$3.globalStorage;
+
+	function read$4(key) {
+	  return globalStorage[key];
+	}
+
+	function write$4(key, data) {
+	  globalStorage[key] = data;
+	}
 
-	var staticAccessors$37 = { VERBOSE: { configurable: true },MAX_DISTANCE_DIFF_FRAC: { configurable: true } };
-	BufferDistanceValidator.prototype.checkMaximumDistance = function checkMaximumDistance (input, bufCurve, maxDist) {
-	  var haus = new DiscreteHausdorffDistance(bufCurve, input);
-	  haus.setDensifyFraction(0.25);
-	  this._maxDistanceFound = haus.orientedDistance();
-	  if (this._maxDistanceFound > maxDist) {
-	    this._isValid = false;
-	    var pts = haus.getCoordinates();
-	    this._errorLocation = pts[1];
-	    this._errorIndicator = input.getFactory().createLineString(pts);
-	    this._errMsg = 'Distance between buffer curve and input is too large (' + this._maxDistanceFound + ' at ' + WKTWriter.toLineString(pts[0], pts[1]) + ')';
+	function each$4(fn) {
+	  for (var i = globalStorage.length - 1; i >= 0; i--) {
+	    var key = globalStorage.key(i);
+	    fn(globalStorage[key], key);
 	  }
+	}
+
+	function remove$4(key) {
+	  return globalStorage.removeItem(key);
+	}
+
+	function clearAll$4() {
+	  each$4(function (key, _) {
+	    delete globalStorage[key];
+	  });
+	}
+
+	// versions 6 and 7, where no localStorage, sessionStorage, etc
+	// is available.
+
+	var util$2 = util$6;
+	var Global$2 = util$2.Global;
+	var oldIEUserDataStorage = {
+	  name: 'oldIE-userDataStorage',
+	  write: write$3,
+	  read: read$3,
+	  each: each$3,
+	  remove: remove$3,
+	  clearAll: clearAll$3
 	};
-	BufferDistanceValidator.prototype.isValid = function isValid () {
-	  var posDistance = Math.abs(this._bufDistance);
-	  var distDelta = BufferDistanceValidator.MAX_DISTANCE_DIFF_FRAC * posDistance;
-	  this._minValidDistance = posDistance - distDelta;
-	  this._maxValidDistance = posDistance + distDelta;
-	  if (this._input.isEmpty() || this._result.isEmpty()) { return true }
-	  if (this._bufDistance > 0.0) {
-	    this.checkPositiveValid();
-	  } else {
-	    this.checkNegativeValid();
-	  }
-	  if (BufferDistanceValidator.VERBOSE) {
-	    System.out.println('Min Dist= ' + this._minDistanceFound + '  err= ' + (1.0 - this._minDistanceFound / this._bufDistance) + '  Max Dist= ' + this._maxDistanceFound + '  err= ' + (this._maxDistanceFound / this._bufDistance - 1.0));
+	var storageName = 'storejs';
+	var doc$1 = Global$2.document;
+
+	var _withStorageEl = _makeIEStorageElFunction();
+
+	var disable = (Global$2.navigator ? Global$2.navigator.userAgent : '').match(/ (MSIE 8|MSIE 9|MSIE 10)\./); // MSIE 9.x, MSIE 10.x
+
+	function write$3(unfixedKey, data) {
+	  if (disable) {
+	    return;
 	  }
-	  return this._isValid
-	};
-	BufferDistanceValidator.prototype.checkNegativeValid = function checkNegativeValid () {
-	  if (!(this._input instanceof Polygon || this._input instanceof MultiPolygon || this._input instanceof GeometryCollection)) {
-	    return null
-	  }
-	  var inputCurve = this.getPolygonLines(this._input);
-	  this.checkMinimumDistance(inputCurve, this._result, this._minValidDistance);
-	  if (!this._isValid) { return null }
-	  this.checkMaximumDistance(inputCurve, this._result, this._maxValidDistance);
-	};
-	BufferDistanceValidator.prototype.getErrorIndicator = function getErrorIndicator () {
-	  return this._errorIndicator
-	};
-	BufferDistanceValidator.prototype.checkMinimumDistance = function checkMinimumDistance (g1, g2, minDist) {
-	  var distOp = new DistanceOp(g1, g2, minDist);
-	  this._minDistanceFound = distOp.distance();
-	  if (this._minDistanceFound < minDist) {
-	    this._isValid = false;
-	    var pts = distOp.nearestPoints();
-	    this._errorLocation = distOp.nearestPoints()[1];
-	    this._errorIndicator = g1.getFactory().createLineString(pts);
-	    this._errMsg = 'Distance between buffer curve and input is too small (' + this._minDistanceFound + ' at ' + WKTWriter.toLineString(pts[0], pts[1]) + ' )';
+
+	  var fixedKey = fixKey(unfixedKey);
+
+	  _withStorageEl(function (storageEl) {
+	    storageEl.setAttribute(fixedKey, data);
+	    storageEl.save(storageName);
+	  });
+	}
+
+	function read$3(unfixedKey) {
+	  if (disable) {
+	    return;
 	  }
-	};
-	BufferDistanceValidator.prototype.checkPositiveValid = function checkPositiveValid () {
-	  var bufCurve = this._result.getBoundary();
-	  this.checkMinimumDistance(this._input, bufCurve, this._minValidDistance);
-	  if (!this._isValid) { return null }
-	  this.checkMaximumDistance(this._input, bufCurve, this._maxValidDistance);
-	};
-	BufferDistanceValidator.prototype.getErrorLocation = function getErrorLocation () {
-	  return this._errorLocation
-	};
-	BufferDistanceValidator.prototype.getPolygonLines = function getPolygonLines (g) {
-	  var lines = new ArrayList();
-	  var lineExtracter = new LinearComponentExtracter(lines);
-	  var polys = PolygonExtracter.getPolygons(g);
-	  for (var i = polys.iterator(); i.hasNext();) {
-	    var poly = i.next();
-	    poly.apply(lineExtracter);
-	  }
-	  return g.getFactory().buildGeometry(lines)
-	};
-	BufferDistanceValidator.prototype.getErrorMessage = function getErrorMessage () {
-	  return this._errMsg
-	};
-	BufferDistanceValidator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BufferDistanceValidator.prototype.getClass = function getClass () {
-	  return BufferDistanceValidator
-	};
-	staticAccessors$37.VERBOSE.get = function () { return false };
-	staticAccessors$37.MAX_DISTANCE_DIFF_FRAC.get = function () { return 0.012 };
-
-	Object.defineProperties( BufferDistanceValidator, staticAccessors$37 );
-
-	var BufferResultValidator = function BufferResultValidator (input, distance, result) {
-	  this._isValid = true;
-	  this._errorMsg = null;
-	  this._errorLocation = null;
-	  this._errorIndicator = null;
-	  this._input = input || null;
-	  this._distance = distance || null;
-	  this._result = result || null;
-	};
 
-	var staticAccessors$40 = { VERBOSE: { configurable: true },MAX_ENV_DIFF_FRAC: { configurable: true } };
-	BufferResultValidator.prototype.isValid = function isValid () {
-	  this.checkPolygonal();
-	  if (!this._isValid) { return this._isValid }
-	  this.checkExpectedEmpty();
-	  if (!this._isValid) { return this._isValid }
-	  this.checkEnvelope();
-	  if (!this._isValid) { return this._isValid }
-	  this.checkArea();
-	  if (!this._isValid) { return this._isValid }
-	  this.checkDistance();
-	  return this._isValid
-	};
-	BufferResultValidator.prototype.checkEnvelope = function checkEnvelope () {
-	  if (this._distance < 0.0) { return null }
-	  var padding = this._distance * BufferResultValidator.MAX_ENV_DIFF_FRAC;
-	  if (padding === 0.0) { padding = 0.001; }
-	  var expectedEnv = new Envelope(this._input.getEnvelopeInternal());
-	  expectedEnv.expandBy(this._distance);
-	  var bufEnv = new Envelope(this._result.getEnvelopeInternal());
-	  bufEnv.expandBy(padding);
-	  if (!bufEnv.contains(expectedEnv)) {
-	    this._isValid = false;
-	    this._errorMsg = 'Buffer envelope is incorrect';
-	    this._errorIndicator = this._input.getFactory().toGeometry(bufEnv);
-	  }
-	  this.report('Envelope');
-	};
-	BufferResultValidator.prototype.checkDistance = function checkDistance () {
-	  var distValid = new BufferDistanceValidator(this._input, this._distance, this._result);
-	  if (!distValid.isValid()) {
-	    this._isValid = false;
-	    this._errorMsg = distValid.getErrorMessage();
-	    this._errorLocation = distValid.getErrorLocation();
-	    this._errorIndicator = distValid.getErrorIndicator();
-	  }
-	  this.report('Distance');
-	};
-	BufferResultValidator.prototype.checkArea = function checkArea () {
-	  var inputArea = this._input.getArea();
-	  var resultArea = this._result.getArea();
-	  if (this._distance > 0.0 && inputArea > resultArea) {
-	    this._isValid = false;
-	    this._errorMsg = 'Area of positive buffer is smaller than input';
-	    this._errorIndicator = this._result;
-	  }
-	  if (this._distance < 0.0 && inputArea < resultArea) {
-	    this._isValid = false;
-	    this._errorMsg = 'Area of negative buffer is larger than input';
-	    this._errorIndicator = this._result;
-	  }
-	  this.report('Area');
-	};
-	BufferResultValidator.prototype.checkPolygonal = function checkPolygonal () {
-	  if (!(this._result instanceof Polygon || this._result instanceof MultiPolygon)) { this._isValid = false; }
-	  this._errorMsg = 'Result is not polygonal';
-	  this._errorIndicator = this._result;
-	  this.report('Polygonal');
-	};
-	BufferResultValidator.prototype.getErrorIndicator = function getErrorIndicator () {
-	  return this._errorIndicator
-	};
-	BufferResultValidator.prototype.getErrorLocation = function getErrorLocation () {
-	  return this._errorLocation
-	};
-	BufferResultValidator.prototype.checkExpectedEmpty = function checkExpectedEmpty () {
-	  if (this._input.getDimension() >= 2) { return null }
-	  if (this._distance > 0.0) { return null }
-	  if (!this._result.isEmpty()) {
-	    this._isValid = false;
-	    this._errorMsg = 'Result is non-empty';
-	    this._errorIndicator = this._result;
-	  }
-	  this.report('ExpectedEmpty');
-	};
-	BufferResultValidator.prototype.report = function report (checkName) {
-	  if (!BufferResultValidator.VERBOSE) { return null }
-	  System.out.println('Check ' + checkName + ': ' + (this._isValid ? 'passed' : 'FAILED'));
-	};
-	BufferResultValidator.prototype.getErrorMessage = function getErrorMessage () {
-	  return this._errorMsg
-	};
-	BufferResultValidator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BufferResultValidator.prototype.getClass = function getClass () {
-	  return BufferResultValidator
-	};
-	BufferResultValidator.isValidMsg = function isValidMsg (g, distance, result) {
-	  var validator = new BufferResultValidator(g, distance, result);
-	  if (!validator.isValid()) { return validator.getErrorMessage() }
-	  return null
-	};
-	BufferResultValidator.isValid = function isValid (g, distance, result) {
-	  var validator = new BufferResultValidator(g, distance, result);
-	  if (validator.isValid()) { return true }
-	  return false
-	};
-	staticAccessors$40.VERBOSE.get = function () { return false };
-	staticAccessors$40.MAX_ENV_DIFF_FRAC.get = function () { return 0.012 };
+	  var fixedKey = fixKey(unfixedKey);
+	  var res = null;
 
-	Object.defineProperties( BufferResultValidator, staticAccessors$40 );
+	  _withStorageEl(function (storageEl) {
+	    res = storageEl.getAttribute(fixedKey);
+	  });
 
-	// operation.buffer
+	  return res;
+	}
 
-	var BasicSegmentString = function BasicSegmentString () {
-	  this._pts = null;
-	  this._data = null;
-	  var pts = arguments[0];
-	  var data = arguments[1];
-	  this._pts = pts;
-	  this._data = data;
-	};
-	BasicSegmentString.prototype.getCoordinates = function getCoordinates () {
-	  return this._pts
-	};
-	BasicSegmentString.prototype.size = function size () {
-	  return this._pts.length
-	};
-	BasicSegmentString.prototype.getCoordinate = function getCoordinate (i) {
-	  return this._pts[i]
-	};
-	BasicSegmentString.prototype.isClosed = function isClosed () {
-	  return this._pts[0].equals(this._pts[this._pts.length - 1])
-	};
-	BasicSegmentString.prototype.getSegmentOctant = function getSegmentOctant (index) {
-	  if (index === this._pts.length - 1) { return -1 }
-	  return Octant.octant(this.getCoordinate(index), this.getCoordinate(index + 1))
-	};
-	BasicSegmentString.prototype.setData = function setData (data) {
-	  this._data = data;
-	};
-	BasicSegmentString.prototype.getData = function getData () {
-	  return this._data
-	};
-	BasicSegmentString.prototype.toString = function toString () {
-	  return WKTWriter.toLineString(new CoordinateArraySequence(this._pts))
-	};
-	BasicSegmentString.prototype.interfaces_ = function interfaces_ () {
-	  return [SegmentString]
-	};
-	BasicSegmentString.prototype.getClass = function getClass () {
-	  return BasicSegmentString
-	};
+	function each$3(callback) {
+	  _withStorageEl(function (storageEl) {
+	    var attributes = storageEl.XMLDocument.documentElement.attributes;
 
-	var InteriorIntersectionFinder = function InteriorIntersectionFinder () {
-	  this._findAllIntersections = false;
-	  this._isCheckEndSegmentsOnly = false;
-	  this._li = null;
-	  this._interiorIntersection = null;
-	  this._intSegments = null;
-	  this._intersections = new ArrayList();
-	  this._intersectionCount = 0;
-	  this._keepIntersections = true;
-	  var li = arguments[0];
-	  this._li = li;
-	  this._interiorIntersection = null;
-	};
-	InteriorIntersectionFinder.prototype.getInteriorIntersection = function getInteriorIntersection () {
-	  return this._interiorIntersection
-	};
-	InteriorIntersectionFinder.prototype.setCheckEndSegmentsOnly = function setCheckEndSegmentsOnly (isCheckEndSegmentsOnly) {
-	  this._isCheckEndSegmentsOnly = isCheckEndSegmentsOnly;
-	};
-	InteriorIntersectionFinder.prototype.getIntersectionSegments = function getIntersectionSegments () {
-	  return this._intSegments
-	};
-	InteriorIntersectionFinder.prototype.count = function count () {
-	  return this._intersectionCount
-	};
-	InteriorIntersectionFinder.prototype.getIntersections = function getIntersections () {
-	  return this._intersections
-	};
-	InteriorIntersectionFinder.prototype.setFindAllIntersections = function setFindAllIntersections (findAllIntersections) {
-	  this._findAllIntersections = findAllIntersections;
-	};
-	InteriorIntersectionFinder.prototype.setKeepIntersections = function setKeepIntersections (keepIntersections) {
-	  this._keepIntersections = keepIntersections;
-	};
-	InteriorIntersectionFinder.prototype.processIntersections = function processIntersections (e0, segIndex0, e1, segIndex1) {
-	  if (!this._findAllIntersections && this.hasIntersection()) { return null }
-	  if (e0 === e1 && segIndex0 === segIndex1) { return null }
-	  if (this._isCheckEndSegmentsOnly) {
-	    var isEndSegPresent = this.isEndSegment(e0, segIndex0) || this.isEndSegment(e1, segIndex1);
-	    if (!isEndSegPresent) { return null }
-	  }
-	  var p00 = e0.getCoordinates()[segIndex0];
-	  var p01 = e0.getCoordinates()[segIndex0 + 1];
-	  var p10 = e1.getCoordinates()[segIndex1];
-	  var p11 = e1.getCoordinates()[segIndex1 + 1];
-	  this._li.computeIntersection(p00, p01, p10, p11);
-	  if (this._li.hasIntersection()) {
-	    if (this._li.isInteriorIntersection()) {
-	      this._intSegments = new Array(4).fill(null);
-	      this._intSegments[0] = p00;
-	      this._intSegments[1] = p01;
-	      this._intSegments[2] = p10;
-	      this._intSegments[3] = p11;
-	      this._interiorIntersection = this._li.getIntersection(0);
-	      if (this._keepIntersections) { this._intersections.add(this._interiorIntersection); }
-	      this._intersectionCount++;
+	    for (var i = attributes.length - 1; i >= 0; i--) {
+	      var attr = attributes[i];
+	      callback(storageEl.getAttribute(attr.name), attr.name);
 	    }
-	  }
-	};
-	InteriorIntersectionFinder.prototype.isEndSegment = function isEndSegment (segStr, index) {
-	  if (index === 0) { return true }
-	  if (index >= segStr.size() - 2) { return true }
-	  return false
-	};
-	InteriorIntersectionFinder.prototype.hasIntersection = function hasIntersection () {
-	  return this._interiorIntersection !== null
-	};
-	InteriorIntersectionFinder.prototype.isDone = function isDone () {
-	  if (this._findAllIntersections) { return false }
-	  return this._interiorIntersection !== null
-	};
-	InteriorIntersectionFinder.prototype.interfaces_ = function interfaces_ () {
-	  return [SegmentIntersector]
-	};
-	InteriorIntersectionFinder.prototype.getClass = function getClass () {
-	  return InteriorIntersectionFinder
-	};
-	InteriorIntersectionFinder.createAllIntersectionsFinder = function createAllIntersectionsFinder (li) {
-	  var finder = new InteriorIntersectionFinder(li);
-	  finder.setFindAllIntersections(true);
-	  return finder
-	};
-	InteriorIntersectionFinder.createAnyIntersectionFinder = function createAnyIntersectionFinder (li) {
-	  return new InteriorIntersectionFinder(li)
-	};
-	InteriorIntersectionFinder.createIntersectionCounter = function createIntersectionCounter (li) {
-	  var finder = new InteriorIntersectionFinder(li);
-	  finder.setFindAllIntersections(true);
-	  finder.setKeepIntersections(false);
-	  return finder
-	};
+	  });
+	}
 
-	var FastNodingValidator = function FastNodingValidator () {
-	  this._li = new RobustLineIntersector();
-	  this._segStrings = null;
-	  this._findAllIntersections = false;
-	  this._segInt = null;
-	  this._isValid = true;
-	  var segStrings = arguments[0];
-	  this._segStrings = segStrings;
-	};
-	FastNodingValidator.prototype.execute = function execute () {
-	  if (this._segInt !== null) { return null }
-	  this.checkInteriorIntersections();
-	};
-	FastNodingValidator.prototype.getIntersections = function getIntersections () {
-	  return this._segInt.getIntersections()
-	};
-	FastNodingValidator.prototype.isValid = function isValid () {
-	  this.execute();
-	  return this._isValid
-	};
-	FastNodingValidator.prototype.setFindAllIntersections = function setFindAllIntersections (findAllIntersections) {
-	  this._findAllIntersections = findAllIntersections;
-	};
-	FastNodingValidator.prototype.checkInteriorIntersections = function checkInteriorIntersections () {
-	  this._isValid = true;
-	  this._segInt = new InteriorIntersectionFinder(this._li);
-	  this._segInt.setFindAllIntersections(this._findAllIntersections);
-	  var noder = new MCIndexNoder();
-	  noder.setSegmentIntersector(this._segInt);
-	  noder.computeNodes(this._segStrings);
-	  if (this._segInt.hasIntersection()) {
-	    this._isValid = false;
-	    return null
-	  }
-	};
-	FastNodingValidator.prototype.checkValid = function checkValid () {
-	  this.execute();
-	  if (!this._isValid) { throw new TopologyException(this.getErrorMessage(), this._segInt.getInteriorIntersection()) }
-	};
-	FastNodingValidator.prototype.getErrorMessage = function getErrorMessage () {
-	  if (this._isValid) { return 'no intersections found' }
-	  var intSegs = this._segInt.getIntersectionSegments();
-	  return 'found non-noded intersection between ' + WKTWriter.toLineString(intSegs[0], intSegs[1]) + ' and ' + WKTWriter.toLineString(intSegs[2], intSegs[3])
-	};
-	FastNodingValidator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	FastNodingValidator.prototype.getClass = function getClass () {
-	  return FastNodingValidator
-	};
-	FastNodingValidator.computeIntersections = function computeIntersections (segStrings) {
-	  var nv = new FastNodingValidator(segStrings);
-	  nv.setFindAllIntersections(true);
-	  nv.isValid();
-	  return nv.getIntersections()
-	};
+	function remove$3(unfixedKey) {
+	  var fixedKey = fixKey(unfixedKey);
 
-	var EdgeNodingValidator = function EdgeNodingValidator () {
-	  this._nv = null;
-	  var edges = arguments[0];
-	  this._nv = new FastNodingValidator(EdgeNodingValidator.toSegmentStrings(edges));
-	};
-	EdgeNodingValidator.prototype.checkValid = function checkValid () {
-	  this._nv.checkValid();
-	};
-	EdgeNodingValidator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	EdgeNodingValidator.prototype.getClass = function getClass () {
-	  return EdgeNodingValidator
-	};
-	EdgeNodingValidator.toSegmentStrings = function toSegmentStrings (edges) {
-	  var segStrings = new ArrayList();
-	  for (var i = edges.iterator(); i.hasNext();) {
-	    var e = i.next();
-	    segStrings.add(new BasicSegmentString(e.getCoordinates(), e));
+	  _withStorageEl(function (storageEl) {
+	    storageEl.removeAttribute(fixedKey);
+	    storageEl.save(storageName);
+	  });
+	}
+
+	function clearAll$3() {
+	  _withStorageEl(function (storageEl) {
+	    var attributes = storageEl.XMLDocument.documentElement.attributes;
+	    storageEl.load(storageName);
+
+	    for (var i = attributes.length - 1; i >= 0; i--) {
+	      storageEl.removeAttribute(attributes[i].name);
+	    }
+
+	    storageEl.save(storageName);
+	  });
+	} // Helpers
+	//////////
+	// In IE7, keys cannot start with a digit or contain certain chars.
+	// See https://github.com/marcuswestin/store.js/issues/40
+	// See https://github.com/marcuswestin/store.js/issues/83
+
+
+	var forbiddenCharsRegex = new RegExp("[!\"#$%&'()*+,/\\\\:;<=>?@[\\]^`{|}~]", "g");
+
+	function fixKey(key) {
+	  return key.replace(/^\d/, '___$&').replace(forbiddenCharsRegex, '___');
+	}
+
+	function _makeIEStorageElFunction() {
+	  if (!doc$1 || !doc$1.documentElement || !doc$1.documentElement.addBehavior) {
+	    return null;
 	  }
-	  return segStrings
-	};
-	EdgeNodingValidator.checkValid = function checkValid (edges) {
-	  var validator = new EdgeNodingValidator(edges);
-	  validator.checkValid();
-	};
 
-	var GeometryCollectionMapper = function GeometryCollectionMapper (mapOp) {
-	  this._mapOp = mapOp;
+	  var scriptTag = 'script',
+	      storageOwner,
+	      storageContainer,
+	      storageEl; // Since #userData storage applies only to specific paths, we need to
+	  // somehow link our data to a specific path.  We choose /favicon.ico
+	  // as a pretty safe option, since all browsers already make a request to
+	  // this URL anyway and being a 404 will not hurt us here.  We wrap an
+	  // iframe pointing to the favicon in an ActiveXObject(htmlfile) object
+	  // (see: http://msdn.microsoft.com/en-us/library/aa752574(v=VS.85).aspx)
+	  // since the iframe access rules appear to allow direct access and
+	  // manipulation of the document element, even for a 404 page.  This
+	  // document can be used instead of the current document (which would
+	  // have been limited to the current path) to perform #userData storage.
+
+	  try {
+	    /* global ActiveXObject */
+	    storageContainer = new ActiveXObject('htmlfile');
+	    storageContainer.open();
+	    storageContainer.write('<' + scriptTag + '>document.w=window</' + scriptTag + '><iframe src="/favicon.ico"></iframe>');
+	    storageContainer.close();
+	    storageOwner = storageContainer.w.frames[0].document;
+	    storageEl = storageOwner.createElement('div');
+	  } catch (e) {
+	    // somehow ActiveXObject instantiation failed (perhaps some special
+	    // security settings or otherwse), fall back to per-path storage
+	    storageEl = doc$1.createElement('div');
+	    storageOwner = doc$1.body;
+	  }
+
+	  return function (storeFunction) {
+	    var args = [].slice.call(arguments, 0);
+	    args.unshift(storageEl); // See http://msdn.microsoft.com/en-us/library/ms531081(v=VS.85).aspx
+	    // and http://msdn.microsoft.com/en-us/library/ms531424(v=VS.85).aspx
+
+	    storageOwner.appendChild(storageEl);
+	    storageEl.addBehavior('#default#userData');
+	    storageEl.load(storageName);
+	    storeFunction.apply(this, args);
+	    storageOwner.removeChild(storageEl);
+	    return;
+	  };
+	}
+
+	// doesn't work but cookies do. This implementation is adopted from
+	// https://developer.mozilla.org/en-US/docs/Web/API/Storage/LocalStorage
+
+	var util$1 = util$6;
+	var Global$1 = util$1.Global;
+	var trim = util$1.trim;
+	var cookieStorage = {
+	  name: 'cookieStorage',
+	  read: read$2,
+	  write: write$2,
+	  each: each$2,
+	  remove: remove$2,
+	  clearAll: clearAll$2
 	};
-	GeometryCollectionMapper.prototype.map = function map (gc) {
-	    var this$1 = this;
+	var doc = Global$1.document;
 
-	  var mapped = new ArrayList();
-	  for (var i = 0; i < gc.getNumGeometries(); i++) {
-	    var g = this$1._mapOp.map(gc.getGeometryN(i));
-	    if (!g.isEmpty()) { mapped.add(g); }
+	function read$2(key) {
+	  if (!key || !_has(key)) {
+	    return null;
 	  }
-	  return gc.getFactory().createGeometryCollection(GeometryFactory.toGeometryArray(mapped))
-	};
-	GeometryCollectionMapper.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryCollectionMapper.prototype.getClass = function getClass () {
-	  return GeometryCollectionMapper
-	};
-	GeometryCollectionMapper.map = function map (gc, op) {
-	  var mapper = new GeometryCollectionMapper(op);
-	  return mapper.map(gc)
-	};
 
-	var LineBuilder = function LineBuilder () {
-	  this._op = null;
-	  this._geometryFactory = null;
-	  this._ptLocator = null;
-	  this._lineEdgesList = new ArrayList();
-	  this._resultLineList = new ArrayList();
-	  var op = arguments[0];
-	  var geometryFactory = arguments[1];
-	  var ptLocator = arguments[2];
-	  this._op = op;
-	  this._geometryFactory = geometryFactory;
-	  this._ptLocator = ptLocator;
-	};
-	LineBuilder.prototype.collectLines = function collectLines (opCode) {
-	    var this$1 = this;
+	  var regexpStr = "(?:^|.*;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=\\s*((?:[^;](?!;))*[^;]?).*";
+	  return unescape(doc.cookie.replace(new RegExp(regexpStr), "$1"));
+	}
 
-	  for (var it = this._op.getGraph().getEdgeEnds().iterator(); it.hasNext();) {
-	    var de = it.next();
-	    this$1.collectLineEdge(de, opCode, this$1._lineEdgesList);
-	    this$1.collectBoundaryTouchEdge(de, opCode, this$1._lineEdgesList);
-	  }
-	};
-	LineBuilder.prototype.labelIsolatedLine = function labelIsolatedLine (e, targetIndex) {
-	  var loc = this._ptLocator.locate(e.getCoordinate(), this._op.getArgGeometry(targetIndex));
-	  e.getLabel().setLocation(targetIndex, loc);
-	};
-	LineBuilder.prototype.build = function build (opCode) {
-	  this.findCoveredLineEdges();
-	  this.collectLines(opCode);
-	  this.buildLines(opCode);
-	  return this._resultLineList
-	};
-	LineBuilder.prototype.collectLineEdge = function collectLineEdge (de, opCode, edges) {
-	  var label = de.getLabel();
-	  var e = de.getEdge();
-	  if (de.isLineEdge()) {
-	    if (!de.isVisited() && OverlayOp.isResultOfOp(label, opCode) && !e.isCovered()) {
-	      edges.add(e);
-	      de.setVisitedEdge(true);
-	    }
-	  }
-	};
-	LineBuilder.prototype.findCoveredLineEdges = function findCoveredLineEdges () {
-	    var this$1 = this;
+	function each$2(callback) {
+	  var cookies = doc.cookie.split(/; ?/g);
 
-	  for (var nodeit = this._op.getGraph().getNodes().iterator(); nodeit.hasNext();) {
-	    var node = nodeit.next();
-	    node.getEdges().findCoveredLineEdges();
-	  }
-	  for (var it = this._op.getGraph().getEdgeEnds().iterator(); it.hasNext();) {
-	    var de = it.next();
-	    var e = de.getEdge();
-	    if (de.isLineEdge() && !e.isCoveredSet()) {
-	      var isCovered = this$1._op.isCoveredByA(de.getCoordinate());
-	      e.setCovered(isCovered);
+	  for (var i = cookies.length - 1; i >= 0; i--) {
+	    if (!trim(cookies[i])) {
+	      continue;
 	    }
-	  }
-	};
-	LineBuilder.prototype.labelIsolatedLines = function labelIsolatedLines (edgesList) {
-	    var this$1 = this;
 
-	  for (var it = edgesList.iterator(); it.hasNext();) {
-	    var e = it.next();
-	    var label = e.getLabel();
-	    if (e.isIsolated()) {
-	      if (label.isNull(0)) { this$1.labelIsolatedLine(e, 0); } else { this$1.labelIsolatedLine(e, 1); }
-	    }
+	    var kvp = cookies[i].split('=');
+	    var key = unescape(kvp[0]);
+	    var val = unescape(kvp[1]);
+	    callback(val, key);
 	  }
-	};
-	LineBuilder.prototype.buildLines = function buildLines (opCode) {
-	    var this$1 = this;
+	}
 
-	  for (var it = this._lineEdgesList.iterator(); it.hasNext();) {
-	    var e = it.next();
-	    // const label = e.getLabel()
-	    var line = this$1._geometryFactory.createLineString(e.getCoordinates());
-	    this$1._resultLineList.add(line);
-	    e.setInResult(true);
-	  }
-	};
-	LineBuilder.prototype.collectBoundaryTouchEdge = function collectBoundaryTouchEdge (de, opCode, edges) {
-	  var label = de.getLabel();
-	  if (de.isLineEdge()) { return null }
-	  if (de.isVisited()) { return null }
-	  if (de.isInteriorAreaEdge()) { return null }
-	  if (de.getEdge().isInResult()) { return null }
-	  Assert.isTrue(!(de.isInResult() || de.getSym().isInResult()) || !de.getEdge().isInResult());
-	  if (OverlayOp.isResultOfOp(label, opCode) && opCode === OverlayOp.INTERSECTION) {
-	    edges.add(de.getEdge());
-	    de.setVisitedEdge(true);
+	function write$2(key, data) {
+	  if (!key) {
+	    return;
 	  }
-	};
-	LineBuilder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	LineBuilder.prototype.getClass = function getClass () {
-	  return LineBuilder
-	};
 
-	var PointBuilder = function PointBuilder () {
-	  this._op = null;
-	  this._geometryFactory = null;
-	  this._resultPointList = new ArrayList();
-	  var op = arguments[0];
-	  var geometryFactory = arguments[1];
-	  // const ptLocator = arguments[2]
-	  this._op = op;
-	  this._geometryFactory = geometryFactory;
-	};
-	PointBuilder.prototype.filterCoveredNodeToPoint = function filterCoveredNodeToPoint (n) {
-	  var coord = n.getCoordinate();
-	  if (!this._op.isCoveredByLA(coord)) {
-	    var pt = this._geometryFactory.createPoint(coord);
-	    this._resultPointList.add(pt);
-	  }
-	};
-	PointBuilder.prototype.extractNonCoveredResultNodes = function extractNonCoveredResultNodes (opCode) {
-	    var this$1 = this;
+	  doc.cookie = escape(key) + "=" + escape(data) + "; expires=Tue, 19 Jan 2038 03:14:07 GMT; path=/";
+	}
 
-	  for (var nodeit = this._op.getGraph().getNodes().iterator(); nodeit.hasNext();) {
-	    var n = nodeit.next();
-	    if (n.isInResult()) { continue }
-	    if (n.isIncidentEdgeInResult()) { continue }
-	    if (n.getEdges().getDegree() === 0 || opCode === OverlayOp.INTERSECTION) {
-	      var label = n.getLabel();
-	      if (OverlayOp.isResultOfOp(label, opCode)) {
-	        this$1.filterCoveredNodeToPoint(n);
-	      }
-	    }
+	function remove$2(key) {
+	  if (!key || !_has(key)) {
+	    return;
 	  }
-	};
-	PointBuilder.prototype.build = function build (opCode) {
-	  this.extractNonCoveredResultNodes(opCode);
-	  return this._resultPointList
-	};
-	PointBuilder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	PointBuilder.prototype.getClass = function getClass () {
-	  return PointBuilder
-	};
 
-	var GeometryTransformer = function GeometryTransformer () {
-	  this._inputGeom = null;
-	  this._factory = null;
-	  this._pruneEmptyGeometry = true;
-	  this._preserveGeometryCollectionType = true;
-	  this._preserveCollections = false;
-	  this._preserveType = false;
-	};
-	GeometryTransformer.prototype.transformPoint = function transformPoint (geom, parent) {
-	  return this._factory.createPoint(this.transformCoordinates(geom.getCoordinateSequence(), geom))
-	};
-	GeometryTransformer.prototype.transformPolygon = function transformPolygon (geom, parent) {
-	    var this$1 = this;
-
-	  var isAllValidLinearRings = true;
-	  var shell = this.transformLinearRing(geom.getExteriorRing(), geom);
-	  if (shell === null || !(shell instanceof LinearRing) || shell.isEmpty()) { isAllValidLinearRings = false; }
-	  var holes = new ArrayList();
-	  for (var i = 0; i < geom.getNumInteriorRing(); i++) {
-	    var hole = this$1.transformLinearRing(geom.getInteriorRingN(i), geom);
-	    if (hole === null || hole.isEmpty()) {
-	      continue
-	    }
-	    if (!(hole instanceof LinearRing)) { isAllValidLinearRings = false; }
-	    holes.add(hole);
-	  }
-	  if (isAllValidLinearRings) { return this._factory.createPolygon(shell, holes.toArray([])); } else {
-	    var components = new ArrayList();
-	    if (shell !== null) { components.add(shell); }
-	    components.addAll(holes);
-	    return this._factory.buildGeometry(components)
-	  }
-	};
-	GeometryTransformer.prototype.createCoordinateSequence = function createCoordinateSequence (coords) {
-	  return this._factory.getCoordinateSequenceFactory().create(coords)
-	};
-	GeometryTransformer.prototype.getInputGeometry = function getInputGeometry () {
-	  return this._inputGeom
-	};
-	GeometryTransformer.prototype.transformMultiLineString = function transformMultiLineString (geom, parent) {
-	    var this$1 = this;
+	  doc.cookie = escape(key) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/";
+	}
 
-	  var transGeomList = new ArrayList();
-	  for (var i = 0; i < geom.getNumGeometries(); i++) {
-	    var transformGeom = this$1.transformLineString(geom.getGeometryN(i), geom);
-	    if (transformGeom === null) { continue }
-	    if (transformGeom.isEmpty()) { continue }
-	    transGeomList.add(transformGeom);
-	  }
-	  return this._factory.buildGeometry(transGeomList)
-	};
-	GeometryTransformer.prototype.transformCoordinates = function transformCoordinates (coords, parent) {
-	  return this.copy(coords)
-	};
-	GeometryTransformer.prototype.transformLineString = function transformLineString (geom, parent) {
-	  return this._factory.createLineString(this.transformCoordinates(geom.getCoordinateSequence(), geom))
-	};
-	GeometryTransformer.prototype.transformMultiPoint = function transformMultiPoint (geom, parent) {
-	    var this$1 = this;
+	function clearAll$2() {
+	  each$2(function (_, key) {
+	    remove$2(key);
+	  });
+	}
 
-	  var transGeomList = new ArrayList();
-	  for (var i = 0; i < geom.getNumGeometries(); i++) {
-	    var transformGeom = this$1.transformPoint(geom.getGeometryN(i), geom);
-	    if (transformGeom === null) { continue }
-	    if (transformGeom.isEmpty()) { continue }
-	    transGeomList.add(transformGeom);
-	  }
-	  return this._factory.buildGeometry(transGeomList)
-	};
-	GeometryTransformer.prototype.transformMultiPolygon = function transformMultiPolygon (geom, parent) {
-	    var this$1 = this;
+	function _has(key) {
+	  return new RegExp("(?:^|;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=").test(doc.cookie);
+	}
 
-	  var transGeomList = new ArrayList();
-	  for (var i = 0; i < geom.getNumGeometries(); i++) {
-	    var transformGeom = this$1.transformPolygon(geom.getGeometryN(i), geom);
-	    if (transformGeom === null) { continue }
-	    if (transformGeom.isEmpty()) { continue }
-	    transGeomList.add(transformGeom);
-	  }
-	  return this._factory.buildGeometry(transGeomList)
-	};
-	GeometryTransformer.prototype.copy = function copy (seq) {
-	  return seq.copy()
-	};
-	GeometryTransformer.prototype.transformGeometryCollection = function transformGeometryCollection (geom, parent) {
-	    var this$1 = this;
-
-	  var transGeomList = new ArrayList();
-	  for (var i = 0; i < geom.getNumGeometries(); i++) {
-	    var transformGeom = this$1.transform(geom.getGeometryN(i));
-	    if (transformGeom === null) { continue }
-	    if (this$1._pruneEmptyGeometry && transformGeom.isEmpty()) { continue }
-	    transGeomList.add(transformGeom);
-	  }
-	  if (this._preserveGeometryCollectionType) { return this._factory.createGeometryCollection(GeometryFactory.toGeometryArray(transGeomList)) }
-	  return this._factory.buildGeometry(transGeomList)
-	};
-	GeometryTransformer.prototype.transform = function transform (inputGeom) {
-	  this._inputGeom = inputGeom;
-	  this._factory = inputGeom.getFactory();
-	  if (inputGeom instanceof Point$1) { return this.transformPoint(inputGeom, null) }
-	  if (inputGeom instanceof MultiPoint) { return this.transformMultiPoint(inputGeom, null) }
-	  if (inputGeom instanceof LinearRing) { return this.transformLinearRing(inputGeom, null) }
-	  if (inputGeom instanceof LineString) { return this.transformLineString(inputGeom, null) }
-	  if (inputGeom instanceof MultiLineString) { return this.transformMultiLineString(inputGeom, null) }
-	  if (inputGeom instanceof Polygon) { return this.transformPolygon(inputGeom, null) }
-	  if (inputGeom instanceof MultiPolygon) { return this.transformMultiPolygon(inputGeom, null) }
-	  if (inputGeom instanceof GeometryCollection) { return this.transformGeometryCollection(inputGeom, null) }
-	  throw new IllegalArgumentException('Unknown Geometry subtype: ' + inputGeom.getClass().getName())
-	};
-	GeometryTransformer.prototype.transformLinearRing = function transformLinearRing (geom, parent) {
-	  var seq = this.transformCoordinates(geom.getCoordinateSequence(), geom);
-	  if (seq === null) { return this._factory.createLinearRing(null) }
-	  var seqSize = seq.size();
-	  if (seqSize > 0 && seqSize < 4 && !this._preserveType) { return this._factory.createLineString(seq) }
-	  return this._factory.createLinearRing(seq)
-	};
-	GeometryTransformer.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryTransformer.prototype.getClass = function getClass () {
-	  return GeometryTransformer
+	var util = util$6;
+	var Global = util.Global;
+	var sessionStorage_1 = {
+	  name: 'sessionStorage',
+	  read: read$1,
+	  write: write$1,
+	  each: each$1,
+	  remove: remove$1,
+	  clearAll: clearAll$1
 	};
 
-	var LineStringSnapper = function LineStringSnapper () {
-	  this._snapTolerance = 0.0;
-	  this._srcPts = null;
-	  this._seg = new LineSegment();
-	  this._allowSnappingToSourceVertices = false;
-	  this._isClosed = false;
-	  if (arguments[0] instanceof LineString && typeof arguments[1] === 'number') {
-	    var srcLine = arguments[0];
-	    var snapTolerance = arguments[1];
-	    LineStringSnapper.call(this, srcLine.getCoordinates(), snapTolerance);
-	  } else if (arguments[0] instanceof Array && typeof arguments[1] === 'number') {
-	    var srcPts = arguments[0];
-	    var snapTolerance$1 = arguments[1];
-	    this._srcPts = srcPts;
-	    this._isClosed = LineStringSnapper.isClosed(srcPts);
-	    this._snapTolerance = snapTolerance$1;
-	  }
-	};
-	LineStringSnapper.prototype.snapVertices = function snapVertices (srcCoords, snapPts) {
-	    var this$1 = this;
+	function sessionStorage() {
+	  return Global.sessionStorage;
+	}
 
-	  var end = this._isClosed ? srcCoords.size() - 1 : srcCoords.size();
-	  for (var i = 0; i < end; i++) {
-	    var srcPt = srcCoords.get(i);
-	    var snapVert = this$1.findSnapForVertex(srcPt, snapPts);
-	    if (snapVert !== null) {
-	      srcCoords.set(i, new Coordinate(snapVert));
-	      if (i === 0 && this$1._isClosed) { srcCoords.set(srcCoords.size() - 1, new Coordinate(snapVert)); }
-	    }
-	  }
-	};
-	LineStringSnapper.prototype.findSnapForVertex = function findSnapForVertex (pt, snapPts) {
-	    var this$1 = this;
+	function read$1(key) {
+	  return sessionStorage().getItem(key);
+	}
 
-	  for (var i = 0; i < snapPts.length; i++) {
-	    if (pt.equals2D(snapPts[i])) { return null }
-	    if (pt.distance(snapPts[i]) < this$1._snapTolerance) { return snapPts[i] }
-	  }
-	  return null
-	};
-	LineStringSnapper.prototype.snapTo = function snapTo (snapPts) {
-	  var coordList = new CoordinateList(this._srcPts);
-	  this.snapVertices(coordList, snapPts);
-	  this.snapSegments(coordList, snapPts);
-	  var newPts = coordList.toCoordinateArray();
-	  return newPts
-	};
-	LineStringSnapper.prototype.snapSegments = function snapSegments (srcCoords, snapPts) {
-	    var this$1 = this;
+	function write$1(key, data) {
+	  return sessionStorage().setItem(key, data);
+	}
 
-	  if (snapPts.length === 0) { return null }
-	  var distinctPtCount = snapPts.length;
-	  if (snapPts[0].equals2D(snapPts[snapPts.length - 1])) { distinctPtCount = snapPts.length - 1; }
-	  for (var i = 0; i < distinctPtCount; i++) {
-	    var snapPt = snapPts[i];
-	    var index = this$1.findSegmentIndexToSnap(snapPt, srcCoords);
-	    if (index >= 0) {
-	      srcCoords.add(index + 1, new Coordinate(snapPt), false);
-	    }
+	function each$1(fn) {
+	  for (var i = sessionStorage().length - 1; i >= 0; i--) {
+	    var key = sessionStorage().key(i);
+	    fn(read$1(key), key);
 	  }
-	};
-	LineStringSnapper.prototype.findSegmentIndexToSnap = function findSegmentIndexToSnap (snapPt, srcCoords) {
-	    var this$1 = this;
+	}
 
-	  var minDist = Double.MAX_VALUE;
-	  var snapIndex = -1;
-	  for (var i = 0; i < srcCoords.size() - 1; i++) {
-	    this$1._seg.p0 = srcCoords.get(i);
-	    this$1._seg.p1 = srcCoords.get(i + 1);
-	    if (this$1._seg.p0.equals2D(snapPt) || this$1._seg.p1.equals2D(snapPt)) {
-	      if (this$1._allowSnappingToSourceVertices) { continue; } else { return -1 }
-	    }
-	    var dist = this$1._seg.distance(snapPt);
-	    if (dist < this$1._snapTolerance && dist < minDist) {
-	      minDist = dist;
-	      snapIndex = i;
-	    }
-	  }
-	  return snapIndex
-	};
-	LineStringSnapper.prototype.setAllowSnappingToSourceVertices = function setAllowSnappingToSourceVertices (allowSnappingToSourceVertices) {
-	  this._allowSnappingToSourceVertices = allowSnappingToSourceVertices;
-	};
-	LineStringSnapper.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	LineStringSnapper.prototype.getClass = function getClass () {
-	  return LineStringSnapper
-	};
-	LineStringSnapper.isClosed = function isClosed (pts) {
-	  if (pts.length <= 1) { return false }
-	  return pts[0].equals2D(pts[pts.length - 1])
-	};
+	function remove$1(key) {
+	  return sessionStorage().removeItem(key);
+	}
 
-	var GeometrySnapper = function GeometrySnapper (srcGeom) {
-	  this._srcGeom = srcGeom || null;
-	};
+	function clearAll$1() {
+	  return sessionStorage().clear();
+	}
 
-	var staticAccessors$41 = { SNAP_PRECISION_FACTOR: { configurable: true } };
-	GeometrySnapper.prototype.snapTo = function snapTo (snapGeom, snapTolerance) {
-	  var snapPts = this.extractTargetCoordinates(snapGeom);
-	  var snapTrans = new SnapTransformer(snapTolerance, snapPts);
-	  return snapTrans.transform(this._srcGeom)
-	};
-	GeometrySnapper.prototype.snapToSelf = function snapToSelf (snapTolerance, cleanResult) {
-	  var snapPts = this.extractTargetCoordinates(this._srcGeom);
-	  var snapTrans = new SnapTransformer(snapTolerance, snapPts, true);
-	  var snappedGeom = snapTrans.transform(this._srcGeom);
-	  var result = snappedGeom;
-	  if (cleanResult && hasInterface(result, Polygonal)) {
-	    result = snappedGeom.buffer(0);
-	  }
-	  return result
-	};
-	GeometrySnapper.prototype.computeSnapTolerance = function computeSnapTolerance (ringPts) {
-	  var minSegLen = this.computeMinimumSegmentLength(ringPts);
-	  var snapTol = minSegLen / 10;
-	  return snapTol
-	};
-	GeometrySnapper.prototype.extractTargetCoordinates = function extractTargetCoordinates (g) {
-	  var ptSet = new TreeSet();
-	  var pts = g.getCoordinates();
-	  for (var i = 0; i < pts.length; i++) {
-	    ptSet.add(pts[i]);
-	  }
-	  return ptSet.toArray(new Array(0).fill(null))
-	};
-	GeometrySnapper.prototype.computeMinimumSegmentLength = function computeMinimumSegmentLength (pts) {
-	  var minSegLen = Double.MAX_VALUE;
-	  for (var i = 0; i < pts.length - 1; i++) {
-	    var segLen = pts[i].distance(pts[i + 1]);
-	    if (segLen < minSegLen) { minSegLen = segLen; }
-	  }
-	  return minSegLen
-	};
-	GeometrySnapper.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometrySnapper.prototype.getClass = function getClass () {
-	  return GeometrySnapper
-	};
-	GeometrySnapper.snap = function snap (g0, g1, snapTolerance) {
-	  var snapGeom = new Array(2).fill(null);
-	  var snapper0 = new GeometrySnapper(g0);
-	  snapGeom[0] = snapper0.snapTo(g1, snapTolerance);
-	  var snapper1 = new GeometrySnapper(g1);
-	  snapGeom[1] = snapper1.snapTo(snapGeom[0], snapTolerance);
-	  return snapGeom
-	};
-	GeometrySnapper.computeOverlaySnapTolerance = function computeOverlaySnapTolerance () {
-	  if (arguments.length === 1) {
-	    var g = arguments[0];
-	    var snapTolerance = GeometrySnapper.computeSizeBasedSnapTolerance(g);
-	    var pm = g.getPrecisionModel();
-	    if (pm.getType() === PrecisionModel.FIXED) {
-	      var fixedSnapTol = 1 / pm.getScale() * 2 / 1.415;
-	      if (fixedSnapTol > snapTolerance) { snapTolerance = fixedSnapTol; }
-	    }
-	    return snapTolerance
-	  } else if (arguments.length === 2) {
-	    var g0 = arguments[0];
-	    var g1 = arguments[1];
-	    return Math.min(GeometrySnapper.computeOverlaySnapTolerance(g0), GeometrySnapper.computeOverlaySnapTolerance(g1))
-	  }
-	};
-	GeometrySnapper.computeSizeBasedSnapTolerance = function computeSizeBasedSnapTolerance (g) {
-	  var env = g.getEnvelopeInternal();
-	  var minDimension = Math.min(env.getHeight(), env.getWidth());
-	  var snapTol = minDimension * GeometrySnapper.SNAP_PRECISION_FACTOR;
-	  return snapTol
-	};
-	GeometrySnapper.snapToSelf = function snapToSelf (geom, snapTolerance, cleanResult) {
-	  var snapper0 = new GeometrySnapper(geom);
-	  return snapper0.snapToSelf(snapTolerance, cleanResult)
+	// is functions (meaning store.get(), store.set(), etc will all function).
+	// However, stored values will not persist when the browser navigates to
+	// a new page or reloads the current page.
+
+	var memoryStorage_1 = {
+	  name: 'memoryStorage',
+	  read: read,
+	  write: write,
+	  each: each,
+	  remove: remove,
+	  clearAll: clearAll
 	};
-	staticAccessors$41.SNAP_PRECISION_FACTOR.get = function () { return 1e-9 };
+	var memoryStorage = {};
+
+	function read(key) {
+	  return memoryStorage[key];
+	}
 
-	Object.defineProperties( GeometrySnapper, staticAccessors$41 );
+	function write(key, data) {
+	  memoryStorage[key] = data;
+	}
 
-	var SnapTransformer = (function (GeometryTransformer$$1) {
-	  function SnapTransformer (snapTolerance, snapPts, isSelfSnap) {
-	    GeometryTransformer$$1.call(this);
-	    this._snapTolerance = snapTolerance || null;
-	    this._snapPts = snapPts || null;
-	    this._isSelfSnap = (isSelfSnap !== undefined) ? isSelfSnap : false;
+	function each(callback) {
+	  for (var key in memoryStorage) {
+	    if (memoryStorage.hasOwnProperty(key)) {
+	      callback(memoryStorage[key], key);
+	    }
 	  }
+	}
 
-	  if ( GeometryTransformer$$1 ) { SnapTransformer.__proto__ = GeometryTransformer$$1; }
-	  SnapTransformer.prototype = Object.create( GeometryTransformer$$1 && GeometryTransformer$$1.prototype );
-	  SnapTransformer.prototype.constructor = SnapTransformer;
-	  SnapTransformer.prototype.snapLine = function snapLine (srcPts, snapPts) {
-	    var snapper = new LineStringSnapper(srcPts, this._snapTolerance);
-	    snapper.setAllowSnappingToSourceVertices(this._isSelfSnap);
-	    return snapper.snapTo(snapPts)
-	  };
-	  SnapTransformer.prototype.transformCoordinates = function transformCoordinates (coords, parent) {
-	    var srcPts = coords.toCoordinateArray();
-	    var newPts = this.snapLine(srcPts, this._snapPts);
-	    return this._factory.getCoordinateSequenceFactory().create(newPts)
-	  };
-	  SnapTransformer.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  SnapTransformer.prototype.getClass = function getClass () {
-	    return SnapTransformer
-	  };
+	function remove(key) {
+	  delete memoryStorage[key];
+	}
 
-	  return SnapTransformer;
-	}(GeometryTransformer));
+	function clearAll(key) {
+	  memoryStorage = {};
+	}
 
-	var CommonBits = function CommonBits () {
-	  this._isFirst = true;
-	  this._commonMantissaBitsCount = 53;
-	  this._commonBits = 0;
-	  this._commonSignExp = null;
-	};
-	CommonBits.prototype.getCommon = function getCommon () {
-	  return Double.longBitsToDouble(this._commonBits)
-	};
-	CommonBits.prototype.add = function add (num) {
-	  var numBits = Double.doubleToLongBits(num);
-	  if (this._isFirst) {
-	    this._commonBits = numBits;
-	    this._commonSignExp = CommonBits.signExpBits(this._commonBits);
-	    this._isFirst = false;
-	    return null
-	  }
-	  var numSignExp = CommonBits.signExpBits(numBits);
-	  if (numSignExp !== this._commonSignExp) {
-	    this._commonBits = 0;
-	    return null
-	  }
-	  this._commonMantissaBitsCount = CommonBits.numCommonMostSigMantissaBits(this._commonBits, numBits);
-	  this._commonBits = CommonBits.zeroLowerBits(this._commonBits, 64 - (12 + this._commonMantissaBitsCount));
-	};
-	CommonBits.prototype.toString = function toString () {
-	  if (arguments.length === 1) {
-	    var bits = arguments[0];
-	    var x = Double.longBitsToDouble(bits);
-	    var numStr = Double.toBinaryString(bits);
-	    var padStr = '0000000000000000000000000000000000000000000000000000000000000000' + numStr;
-	    var bitStr = padStr.substring(padStr.length - 64);
-	    var str = bitStr.substring(0, 1) + '  ' + bitStr.substring(1, 12) + '(exp) ' + bitStr.substring(12) + ' [ ' + x + ' ]';
-	    return str
-	  }
-	};
-	CommonBits.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CommonBits.prototype.getClass = function getClass () {
-	  return CommonBits
-	};
-	CommonBits.getBit = function getBit (bits, i) {
-	  var mask = 1 << i;
-	  return (bits & mask) !== 0 ? 1 : 0
-	};
-	CommonBits.signExpBits = function signExpBits (num) {
-	  return num >> 52
-	};
-	CommonBits.zeroLowerBits = function zeroLowerBits (bits, nBits) {
-	  var invMask = (1 << nBits) - 1;
-	  var mask = ~invMask;
-	  var zeroed = bits & mask;
-	  return zeroed
-	};
-	CommonBits.numCommonMostSigMantissaBits = function numCommonMostSigMantissaBits (num1, num2) {
-	  var count = 0;
-	  for (var i = 52; i >= 0; i--) {
-	    if (CommonBits.getBit(num1, i) !== CommonBits.getBit(num2, i)) { return count }
-	    count++;
-	  }
-	  return 52
-	};
+	var all = [// Listed in order of usage preference
+	localStorage_1, oldFFGlobalStorage, oldIEUserDataStorage, cookieStorage, sessionStorage_1, memoryStorage_1];
 
-	var CommonBitsRemover = function CommonBitsRemover () {
-	  this._commonCoord = null;
-	  this._ccFilter = new CommonCoordinateFilter();
-	};
+	/* eslint-disable */
+	//  json2.js
+	//  2016-10-28
+	//  Public Domain.
+	//  NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
+	//  See http://www.JSON.org/js.html
+	//  This code should be minified before deployment.
+	//  See http://javascript.crockford.com/jsmin.html
+	//  USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
+	//  NOT CONTROL.
+	//  This file creates a global JSON object containing two methods: stringify
+	//  and parse. This file provides the ES5 JSON capability to ES3 systems.
+	//  If a project might run on IE8 or earlier, then this file should be included.
+	//  This file does nothing on ES5 systems.
+	//      JSON.stringify(value, replacer, space)
+	//          value       any JavaScript value, usually an object or array.
+	//          replacer    an optional parameter that determines how object
+	//                      values are stringified for objects. It can be a
+	//                      function or an array of strings.
+	//          space       an optional parameter that specifies the indentation
+	//                      of nested structures. If it is omitted, the text will
+	//                      be packed without extra whitespace. If it is a number,
+	//                      it will specify the number of spaces to indent at each
+	//                      level. If it is a string (such as "\t" or "&nbsp;"),
+	//                      it contains the characters used to indent at each level.
+	//          This method produces a JSON text from a JavaScript value.
+	//          When an object value is found, if the object contains a toJSON
+	//          method, its toJSON method will be called and the result will be
+	//          stringified. A toJSON method does not serialize: it returns the
+	//          value represented by the name/value pair that should be serialized,
+	//          or undefined if nothing should be serialized. The toJSON method
+	//          will be passed the key associated with the value, and this will be
+	//          bound to the value.
+	//          For example, this would serialize Dates as ISO strings.
+	//              Date.prototype.toJSON = function (key) {
+	//                  function f(n) {
+	//                      // Format integers to have at least two digits.
+	//                      return (n < 10)
+	//                          ? "0" + n
+	//                          : n;
+	//                  }
+	//                  return this.getUTCFullYear()   + "-" +
+	//                       f(this.getUTCMonth() + 1) + "-" +
+	//                       f(this.getUTCDate())      + "T" +
+	//                       f(this.getUTCHours())     + ":" +
+	//                       f(this.getUTCMinutes())   + ":" +
+	//                       f(this.getUTCSeconds())   + "Z";
+	//              };
+	//          You can provide an optional replacer method. It will be passed the
+	//          key and value of each member, with this bound to the containing
+	//          object. The value that is returned from your method will be
+	//          serialized. If your method returns undefined, then the member will
+	//          be excluded from the serialization.
+	//          If the replacer parameter is an array of strings, then it will be
+	//          used to select the members to be serialized. It filters the results
+	//          such that only members with keys listed in the replacer array are
+	//          stringified.
+	//          Values that do not have JSON representations, such as undefined or
+	//          functions, will not be serialized. Such values in objects will be
+	//          dropped; in arrays they will be replaced with null. You can use
+	//          a replacer function to replace those with JSON values.
+	//          JSON.stringify(undefined) returns undefined.
+	//          The optional space parameter produces a stringification of the
+	//          value that is filled with line breaks and indentation to make it
+	//          easier to read.
+	//          If the space parameter is a non-empty string, then that string will
+	//          be used for indentation. If the space parameter is a number, then
+	//          the indentation will be that many spaces.
+	//          Example:
+	//          text = JSON.stringify(["e", {pluribus: "unum"}]);
+	//          // text is '["e",{"pluribus":"unum"}]'
+	//          text = JSON.stringify(["e", {pluribus: "unum"}], null, "\t");
+	//          // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
+	//          text = JSON.stringify([new Date()], function (key, value) {
+	//              return this[key] instanceof Date
+	//                  ? "Date(" + this[key] + ")"
+	//                  : value;
+	//          });
+	//          // text is '["Date(---current time---)"]'
+	//      JSON.parse(text, reviver)
+	//          This method parses a JSON text to produce an object or array.
+	//          It can throw a SyntaxError exception.
+	//          The optional reviver parameter is a function that can filter and
+	//          transform the results. It receives each of the keys and values,
+	//          and its return value is used instead of the original value.
+	//          If it returns what it received, then the structure is not modified.
+	//          If it returns undefined then the member is deleted.
+	//          Example:
+	//          // Parse the text. Values that look like ISO date strings will
+	//          // be converted to Date objects.
+	//          myData = JSON.parse(text, function (key, value) {
+	//              var a;
+	//              if (typeof value === "string") {
+	//                  a =
+	//   /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
+	//                  if (a) {
+	//                      return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
+	//                          +a[5], +a[6]));
+	//                  }
+	//              }
+	//              return value;
+	//          });
+	//          myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
+	//              var d;
+	//              if (typeof value === "string" &&
+	//                      value.slice(0, 5) === "Date(" &&
+	//                      value.slice(-1) === ")") {
+	//                  d = new Date(value.slice(5, -1));
+	//                  if (d) {
+	//                      return d;
+	//                  }
+	//              }
+	//              return value;
+	//          });
+	//  This is a reference implementation. You are free to copy, modify, or
+	//  redistribute.
 
-	var staticAccessors$42 = { CommonCoordinateFilter: { configurable: true },Translater: { configurable: true } };
-	CommonBitsRemover.prototype.addCommonBits = function addCommonBits (geom) {
-	  var trans = new Translater(this._commonCoord);
-	  geom.apply(trans);
-	  geom.geometryChanged();
-	};
-	CommonBitsRemover.prototype.removeCommonBits = function removeCommonBits (geom) {
-	  if (this._commonCoord.x === 0.0 && this._commonCoord.y === 0.0) { return geom }
-	  var invCoord = new Coordinate(this._commonCoord);
-	  invCoord.x = -invCoord.x;
-	  invCoord.y = -invCoord.y;
-	  var trans = new Translater(invCoord);
-	  geom.apply(trans);
-	  geom.geometryChanged();
-	  return geom
-	};
-	CommonBitsRemover.prototype.getCommonCoordinate = function getCommonCoordinate () {
-	  return this._commonCoord
-	};
-	CommonBitsRemover.prototype.add = function add (geom) {
-	  geom.apply(this._ccFilter);
-	  this._commonCoord = this._ccFilter.getCommonCoordinate();
-	};
-	CommonBitsRemover.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CommonBitsRemover.prototype.getClass = function getClass () {
-	  return CommonBitsRemover
-	};
-	staticAccessors$42.CommonCoordinateFilter.get = function () { return CommonCoordinateFilter };
-	staticAccessors$42.Translater.get = function () { return Translater };
+	/*jslint
+	    eval, for, this
+	*/
 
-	Object.defineProperties( CommonBitsRemover, staticAccessors$42 );
+	/*property
+	    JSON, apply, call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
+	    getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
+	    lastIndex, length, parse, prototype, push, replace, slice, stringify,
+	    test, toJSON, toString, valueOf
+	*/
+	// Create a JSON object only if one does not already exist. We create the
+	// methods in a closure to avoid creating global variables.
+	if ((typeof JSON === "undefined" ? "undefined" : _typeof(JSON)) !== "object") {
+	  JSON = {};
+	}
 
-	var CommonCoordinateFilter = function CommonCoordinateFilter () {
-	  this._commonBitsX = new CommonBits();
-	  this._commonBitsY = new CommonBits();
-	};
-	CommonCoordinateFilter.prototype.filter = function filter (coord) {
-	  this._commonBitsX.add(coord.x);
-	  this._commonBitsY.add(coord.y);
-	};
-	CommonCoordinateFilter.prototype.getCommonCoordinate = function getCommonCoordinate () {
-	  return new Coordinate(this._commonBitsX.getCommon(), this._commonBitsY.getCommon())
-	};
-	CommonCoordinateFilter.prototype.interfaces_ = function interfaces_ () {
-	  return [CoordinateFilter]
-	};
-	CommonCoordinateFilter.prototype.getClass = function getClass () {
-	  return CommonCoordinateFilter
-	};
+	(function () {
 
-	var Translater = function Translater () {
-	  this.trans = null;
-	  var trans = arguments[0];
-	  this.trans = trans;
-	};
-	Translater.prototype.filter = function filter (seq, i) {
-	  var xp = seq.getOrdinate(i, 0) + this.trans.x;
-	  var yp = seq.getOrdinate(i, 1) + this.trans.y;
-	  seq.setOrdinate(i, 0, xp);
-	  seq.setOrdinate(i, 1, yp);
-	};
-	Translater.prototype.isDone = function isDone () {
-	  return false
-	};
-	Translater.prototype.isGeometryChanged = function isGeometryChanged () {
-	  return true
-	};
-	Translater.prototype.interfaces_ = function interfaces_ () {
-	  return [CoordinateSequenceFilter]
-	};
-	Translater.prototype.getClass = function getClass () {
-	  return Translater
-	};
+	  var rx_one = /^[\],:{}\s]*$/;
+	  var rx_two = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g;
+	  var rx_three = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g;
+	  var rx_four = /(?:^|:|,)(?:\s*\[)+/g;
+	  var rx_escapable = /[\\"\u0000-\u001f\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
+	  var rx_dangerous = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
 
-	var SnapOverlayOp = function SnapOverlayOp (g1, g2) {
-	  this._geom = new Array(2).fill(null);
-	  this._snapTolerance = null;
-	  this._cbr = null;
-	  this._geom[0] = g1;
-	  this._geom[1] = g2;
-	  this.computeSnapTolerance();
-	};
-	SnapOverlayOp.prototype.selfSnap = function selfSnap (geom) {
-	  var snapper0 = new GeometrySnapper(geom);
-	  var snapGeom = snapper0.snapTo(geom, this._snapTolerance);
-	  return snapGeom
-	};
-	SnapOverlayOp.prototype.removeCommonBits = function removeCommonBits (geom) {
-	  this._cbr = new CommonBitsRemover();
-	  this._cbr.add(geom[0]);
-	  this._cbr.add(geom[1]);
-	  var remGeom = new Array(2).fill(null);
-	  remGeom[0] = this._cbr.removeCommonBits(geom[0].copy());
-	  remGeom[1] = this._cbr.removeCommonBits(geom[1].copy());
-	  return remGeom
-	};
-	SnapOverlayOp.prototype.prepareResult = function prepareResult (geom) {
-	  this._cbr.addCommonBits(geom);
-	  return geom
-	};
-	SnapOverlayOp.prototype.getResultGeometry = function getResultGeometry (opCode) {
-	  var prepGeom = this.snap(this._geom);
-	  var result = OverlayOp.overlayOp(prepGeom[0], prepGeom[1], opCode);
-	  return this.prepareResult(result)
-	};
-	SnapOverlayOp.prototype.checkValid = function checkValid (g) {
-	  if (!g.isValid()) {
-	    System.out.println('Snapped geometry is invalid');
+	  function f(n) {
+	    // Format integers to have at least two digits.
+	    return n < 10 ? "0" + n : n;
 	  }
-	};
-	SnapOverlayOp.prototype.computeSnapTolerance = function computeSnapTolerance () {
-	  this._snapTolerance = GeometrySnapper.computeOverlaySnapTolerance(this._geom[0], this._geom[1]);
-	};
-	SnapOverlayOp.prototype.snap = function snap (geom) {
-	  var remGeom = this.removeCommonBits(geom);
-	  var snapGeom = GeometrySnapper.snap(remGeom[0], remGeom[1], this._snapTolerance);
-	  return snapGeom
-	};
-	SnapOverlayOp.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SnapOverlayOp.prototype.getClass = function getClass () {
-	  return SnapOverlayOp
-	};
-	SnapOverlayOp.overlayOp = function overlayOp (g0, g1, opCode) {
-	  var op = new SnapOverlayOp(g0, g1);
-	  return op.getResultGeometry(opCode)
-	};
-	SnapOverlayOp.union = function union (g0, g1) {
-	  return SnapOverlayOp.overlayOp(g0, g1, OverlayOp.UNION)
-	};
-	SnapOverlayOp.intersection = function intersection (g0, g1) {
-	  return SnapOverlayOp.overlayOp(g0, g1, OverlayOp.INTERSECTION)
-	};
-	SnapOverlayOp.symDifference = function symDifference (g0, g1) {
-	  return SnapOverlayOp.overlayOp(g0, g1, OverlayOp.SYMDIFFERENCE)
-	};
-	SnapOverlayOp.difference = function difference (g0, g1) {
-	  return SnapOverlayOp.overlayOp(g0, g1, OverlayOp.DIFFERENCE)
-	};
 
-	var SnapIfNeededOverlayOp = function SnapIfNeededOverlayOp (g1, g2) {
-	  this._geom = new Array(2).fill(null);
-	  this._geom[0] = g1;
-	  this._geom[1] = g2;
-	};
-	SnapIfNeededOverlayOp.prototype.getResultGeometry = function getResultGeometry (opCode) {
-	  var result = null;
-	  var isSuccess = false;
-	  var savedException = null;
-	  try {
-	    result = OverlayOp.overlayOp(this._geom[0], this._geom[1], opCode);
-	    var isValid = true;
-	    if (isValid) { isSuccess = true; }
-	  } catch (ex) {
-	    if (ex instanceof RuntimeException) {
-	      savedException = ex;
-	    } else { throw ex }
-	  } finally {}
-	  if (!isSuccess) {
-	    try {
-	      result = SnapOverlayOp.overlayOp(this._geom[0], this._geom[1], opCode);
-	    } catch (ex$1) {
-	      if (ex$1 instanceof RuntimeException) {
-	        throw savedException
-	      } else { throw ex$1 }
-	    } finally {}
-	  }
-	  return result
-	};
-	SnapIfNeededOverlayOp.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SnapIfNeededOverlayOp.prototype.getClass = function getClass () {
-	  return SnapIfNeededOverlayOp
-	};
-	SnapIfNeededOverlayOp.overlayOp = function overlayOp (g0, g1, opCode) {
-	  var op = new SnapIfNeededOverlayOp(g0, g1);
-	  return op.getResultGeometry(opCode)
-	};
-	SnapIfNeededOverlayOp.union = function union (g0, g1) {
-	  return SnapIfNeededOverlayOp.overlayOp(g0, g1, OverlayOp.UNION)
-	};
-	SnapIfNeededOverlayOp.intersection = function intersection (g0, g1) {
-	  return SnapIfNeededOverlayOp.overlayOp(g0, g1, OverlayOp.INTERSECTION)
-	};
-	SnapIfNeededOverlayOp.symDifference = function symDifference (g0, g1) {
-	  return SnapIfNeededOverlayOp.overlayOp(g0, g1, OverlayOp.SYMDIFFERENCE)
-	};
-	SnapIfNeededOverlayOp.difference = function difference (g0, g1) {
-	  return SnapIfNeededOverlayOp.overlayOp(g0, g1, OverlayOp.DIFFERENCE)
-	};
+	  function this_value() {
+	    return this.valueOf();
+	  }
 
-	var MonotoneChain$2 = function MonotoneChain () {
-	  this.mce = null;
-	  this.chainIndex = null;
-	  var mce = arguments[0];
-	  var chainIndex = arguments[1];
-	  this.mce = mce;
-	  this.chainIndex = chainIndex;
-	};
-	MonotoneChain$2.prototype.computeIntersections = function computeIntersections (mc, si) {
-	  this.mce.computeIntersectsForChain(this.chainIndex, mc.mce, mc.chainIndex, si);
-	};
-	MonotoneChain$2.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MonotoneChain$2.prototype.getClass = function getClass () {
-	  return MonotoneChain$2
-	};
+	  if (typeof Date.prototype.toJSON !== "function") {
+	    Date.prototype.toJSON = function () {
+	      return isFinite(this.valueOf()) ? this.getUTCFullYear() + "-" + f(this.getUTCMonth() + 1) + "-" + f(this.getUTCDate()) + "T" + f(this.getUTCHours()) + ":" + f(this.getUTCMinutes()) + ":" + f(this.getUTCSeconds()) + "Z" : null;
+	    };
 
-	var SweepLineEvent = function SweepLineEvent () {
-	  this._label = null;
-	  this._xValue = null;
-	  this._eventType = null;
-	  this._insertEvent = null;
-	  this._deleteEventIndex = null;
-	  this._obj = null;
-	  if (arguments.length === 2) {
-	    var x = arguments[0];
-	    var insertEvent = arguments[1];
-	    this._eventType = SweepLineEvent.DELETE;
-	    this._xValue = x;
-	    this._insertEvent = insertEvent;
-	  } else if (arguments.length === 3) {
-	    var label = arguments[0];
-	    var x$1 = arguments[1];
-	    var obj = arguments[2];
-	    this._eventType = SweepLineEvent.INSERT;
-	    this._label = label;
-	    this._xValue = x$1;
-	    this._obj = obj;
+	    Boolean.prototype.toJSON = this_value;
+	    Number.prototype.toJSON = this_value;
+	    String.prototype.toJSON = this_value;
 	  }
-	};
-
-	var staticAccessors$43 = { INSERT: { configurable: true },DELETE: { configurable: true } };
-	SweepLineEvent.prototype.isDelete = function isDelete () {
-	  return this._eventType === SweepLineEvent.DELETE
-	};
-	SweepLineEvent.prototype.setDeleteEventIndex = function setDeleteEventIndex (deleteEventIndex) {
-	  this._deleteEventIndex = deleteEventIndex;
-	};
-	SweepLineEvent.prototype.getObject = function getObject () {
-	  return this._obj
-	};
-	SweepLineEvent.prototype.compareTo = function compareTo (o) {
-	  var pe = o;
-	  if (this._xValue < pe._xValue) { return -1 }
-	  if (this._xValue > pe._xValue) { return 1 }
-	  if (this._eventType < pe._eventType) { return -1 }
-	  if (this._eventType > pe._eventType) { return 1 }
-	  return 0
-	};
-	SweepLineEvent.prototype.getInsertEvent = function getInsertEvent () {
-	  return this._insertEvent
-	};
-	SweepLineEvent.prototype.isInsert = function isInsert () {
-	  return this._eventType === SweepLineEvent.INSERT
-	};
-	SweepLineEvent.prototype.isSameLabel = function isSameLabel (ev) {
-	  if (this._label === null) { return false }
-	  return this._label === ev._label
-	};
-	SweepLineEvent.prototype.getDeleteEventIndex = function getDeleteEventIndex () {
-	  return this._deleteEventIndex
-	};
-	SweepLineEvent.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable]
-	};
-	SweepLineEvent.prototype.getClass = function getClass () {
-	  return SweepLineEvent
-	};
-	staticAccessors$43.INSERT.get = function () { return 1 };
-	staticAccessors$43.DELETE.get = function () { return 2 };
 
-	Object.defineProperties( SweepLineEvent, staticAccessors$43 );
+	  var gap;
+	  var indent;
+	  var meta;
+	  var rep;
 
-	var EdgeSetIntersector = function EdgeSetIntersector () {};
+	  function quote(string) {
+	    // If the string contains no control characters, no quote characters, and no
+	    // backslash characters, then we can safely slap some quotes around it.
+	    // Otherwise we must also replace the offending characters with safe escape
+	    // sequences.
+	    rx_escapable.lastIndex = 0;
+	    return rx_escapable.test(string) ? "\"" + string.replace(rx_escapable, function (a) {
+	      var c = meta[a];
+	      return typeof c === "string" ? c : "\\u" + ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
+	    }) + "\"" : "\"" + string + "\"";
+	  }
 
-	EdgeSetIntersector.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	EdgeSetIntersector.prototype.getClass = function getClass () {
-	  return EdgeSetIntersector
-	};
+	  function str(key, holder) {
+	    // Produce a string from holder[key].
+	    var i; // The loop counter.
 
-	var SegmentIntersector$2 = function SegmentIntersector () {
-	  this._hasIntersection = false;
-	  this._hasProper = false;
-	  this._hasProperInterior = false;
-	  this._properIntersectionPoint = null;
-	  this._li = null;
-	  this._includeProper = null;
-	  this._recordIsolated = null;
-	  this._isSelfIntersection = null;
-	  this._numIntersections = 0;
-	  this.numTests = 0;
-	  this._bdyNodes = null;
-	  this._isDone = false;
-	  this._isDoneWhenProperInt = false;
-	  var li = arguments[0];
-	  var includeProper = arguments[1];
-	  var recordIsolated = arguments[2];
-	  this._li = li;
-	  this._includeProper = includeProper;
-	  this._recordIsolated = recordIsolated;
-	};
-	SegmentIntersector$2.prototype.isTrivialIntersection = function isTrivialIntersection (e0, segIndex0, e1, segIndex1) {
-	  if (e0 === e1) {
-	    if (this._li.getIntersectionNum() === 1) {
-	      if (SegmentIntersector$2.isAdjacentSegments(segIndex0, segIndex1)) { return true }
-	      if (e0.isClosed()) {
-	        var maxSegIndex = e0.getNumPoints() - 1;
-	        if ((segIndex0 === 0 && segIndex1 === maxSegIndex) ||
-	            (segIndex1 === 0 && segIndex0 === maxSegIndex)) {
-	          return true
-	        }
-	      }
-	    }
-	  }
-	  return false
-	};
-	SegmentIntersector$2.prototype.getProperIntersectionPoint = function getProperIntersectionPoint () {
-	  return this._properIntersectionPoint
-	};
-	SegmentIntersector$2.prototype.setIsDoneIfProperInt = function setIsDoneIfProperInt (isDoneWhenProperInt) {
-	  this._isDoneWhenProperInt = isDoneWhenProperInt;
-	};
-	SegmentIntersector$2.prototype.hasProperInteriorIntersection = function hasProperInteriorIntersection () {
-	  return this._hasProperInterior
-	};
-	SegmentIntersector$2.prototype.isBoundaryPointInternal = function isBoundaryPointInternal (li, bdyNodes) {
-	  for (var i = bdyNodes.iterator(); i.hasNext();) {
-	    var node = i.next();
-	    var pt = node.getCoordinate();
-	    if (li.isIntersection(pt)) { return true }
-	  }
-	  return false
-	};
-	SegmentIntersector$2.prototype.hasProperIntersection = function hasProperIntersection () {
-	  return this._hasProper
-	};
-	SegmentIntersector$2.prototype.hasIntersection = function hasIntersection () {
-	  return this._hasIntersection
-	};
-	SegmentIntersector$2.prototype.isDone = function isDone () {
-	  return this._isDone
-	};
-	SegmentIntersector$2.prototype.isBoundaryPoint = function isBoundaryPoint (li, bdyNodes) {
-	  if (bdyNodes === null) { return false }
-	  if (this.isBoundaryPointInternal(li, bdyNodes[0])) { return true }
-	  if (this.isBoundaryPointInternal(li, bdyNodes[1])) { return true }
-	  return false
-	};
-	SegmentIntersector$2.prototype.setBoundaryNodes = function setBoundaryNodes (bdyNodes0, bdyNodes1) {
-	  this._bdyNodes = new Array(2).fill(null);
-	  this._bdyNodes[0] = bdyNodes0;
-	  this._bdyNodes[1] = bdyNodes1;
-	};
-	SegmentIntersector$2.prototype.addIntersections = function addIntersections (e0, segIndex0, e1, segIndex1) {
-	  if (e0 === e1 && segIndex0 === segIndex1) { return null }
-	  this.numTests++;
-	  var p00 = e0.getCoordinates()[segIndex0];
-	  var p01 = e0.getCoordinates()[segIndex0 + 1];
-	  var p10 = e1.getCoordinates()[segIndex1];
-	  var p11 = e1.getCoordinates()[segIndex1 + 1];
-	  this._li.computeIntersection(p00, p01, p10, p11);
-	  if (this._li.hasIntersection()) {
-	    if (this._recordIsolated) {
-	      e0.setIsolated(false);
-	      e1.setIsolated(false);
-	    }
-	    this._numIntersections++;
-	    if (!this.isTrivialIntersection(e0, segIndex0, e1, segIndex1)) {
-	      this._hasIntersection = true;
-	      if (this._includeProper || !this._li.isProper()) {
-	        e0.addIntersections(this._li, segIndex0, 0);
-	        e1.addIntersections(this._li, segIndex1, 1);
-	      }
-	      if (this._li.isProper()) {
-	        this._properIntersectionPoint = this._li.getIntersection(0).copy();
-	        this._hasProper = true;
-	        if (this._isDoneWhenProperInt) {
-	          this._isDone = true;
-	        }
-	        if (!this.isBoundaryPoint(this._li, this._bdyNodes)) { this._hasProperInterior = true; }
-	      }
-	    }
-	  }
-	};
-	SegmentIntersector$2.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SegmentIntersector$2.prototype.getClass = function getClass () {
-	  return SegmentIntersector$2
-	};
-	SegmentIntersector$2.isAdjacentSegments = function isAdjacentSegments (i1, i2) {
-	  return Math.abs(i1 - i2) === 1
-	};
+	    var k; // The member key.
 
-	var SimpleMCSweepLineIntersector = (function (EdgeSetIntersector$$1) {
-	  function SimpleMCSweepLineIntersector () {
-	    EdgeSetIntersector$$1.call(this);
-	    this.events = new ArrayList();
-	    this.nOverlaps = null;
-	  }
+	    var v; // The member value.
 
-	  if ( EdgeSetIntersector$$1 ) { SimpleMCSweepLineIntersector.__proto__ = EdgeSetIntersector$$1; }
-	  SimpleMCSweepLineIntersector.prototype = Object.create( EdgeSetIntersector$$1 && EdgeSetIntersector$$1.prototype );
-	  SimpleMCSweepLineIntersector.prototype.constructor = SimpleMCSweepLineIntersector;
-	  SimpleMCSweepLineIntersector.prototype.prepareEvents = function prepareEvents () {
-	    var this$1 = this;
+	    var length;
+	    var mind = gap;
+	    var partial;
+	    var value = holder[key]; // If the value has a toJSON method, call it to obtain a replacement value.
 
-	    Collections.sort(this.events);
-	    for (var i = 0; i < this.events.size(); i++) {
-	      var ev = this$1.events.get(i);
-	      if (ev.isDelete()) {
-	        ev.getInsertEvent().setDeleteEventIndex(i);
-	      }
-	    }
-	  };
-	  SimpleMCSweepLineIntersector.prototype.computeIntersections = function computeIntersections () {
-	    var this$1 = this;
+	    if (value && _typeof(value) === "object" && typeof value.toJSON === "function") {
+	      value = value.toJSON(key);
+	    } // If we were called with a replacer function, then call the replacer to
+	    // obtain a replacement value.
 
-	    if (arguments.length === 1) {
-	      var si = arguments[0];
-	      this.nOverlaps = 0;
-	      this.prepareEvents();
-	      for (var i = 0; i < this.events.size(); i++) {
-	        var ev = this$1.events.get(i);
-	        if (ev.isInsert()) {
-	          this$1.processOverlaps(i, ev.getDeleteEventIndex(), ev, si);
-	        }
-	        if (si.isDone()) {
-	          break
-	        }
-	      }
-	    } else if (arguments.length === 3) {
-	      if (arguments[2] instanceof SegmentIntersector$2 && (hasInterface(arguments[0], List) && hasInterface(arguments[1], List))) {
-	        var edges0 = arguments[0];
-	        var edges1 = arguments[1];
-	        var si$1 = arguments[2];
-	        this.addEdges(edges0, edges0);
-	        this.addEdges(edges1, edges1);
-	        this.computeIntersections(si$1);
-	      } else if (typeof arguments[2] === 'boolean' && (hasInterface(arguments[0], List) && arguments[1] instanceof SegmentIntersector$2)) {
-	        var edges = arguments[0];
-	        var si$2 = arguments[1];
-	        var testAllSegments = arguments[2];
-	        if (testAllSegments) { this.addEdges(edges, null); } else { this.addEdges(edges); }
-	        this.computeIntersections(si$2);
-	      }
-	    }
-	  };
-	  SimpleMCSweepLineIntersector.prototype.addEdge = function addEdge (edge, edgeSet) {
-	    var this$1 = this;
 
-	    var mce = edge.getMonotoneChainEdge();
-	    var startIndex = mce.getStartIndexes();
-	    for (var i = 0; i < startIndex.length - 1; i++) {
-	      var mc = new MonotoneChain$2(mce, i);
-	      var insertEvent = new SweepLineEvent(edgeSet, mce.getMinX(i), mc);
-	      this$1.events.add(insertEvent);
-	      this$1.events.add(new SweepLineEvent(mce.getMaxX(i), insertEvent));
-	    }
-	  };
-	  SimpleMCSweepLineIntersector.prototype.processOverlaps = function processOverlaps (start, end, ev0, si) {
-	    var this$1 = this;
+	    if (typeof rep === "function") {
+	      value = rep.call(holder, key, value);
+	    } // What happens next depends on the value's type.
 
-	    var mc0 = ev0.getObject();
-	    for (var i = start; i < end; i++) {
-	      var ev1 = this$1.events.get(i);
-	      if (ev1.isInsert()) {
-	        var mc1 = ev1.getObject();
-	        if (!ev0.isSameLabel(ev1)) {
-	          mc0.computeIntersections(mc1, si);
-	          this$1.nOverlaps++;
-	        }
-	      }
-	    }
-	  };
-	  SimpleMCSweepLineIntersector.prototype.addEdges = function addEdges () {
-	    var this$1 = this;
 
-	    if (arguments.length === 1) {
-	      var edges = arguments[0];
-	      for (var i = edges.iterator(); i.hasNext();) {
-	        var edge = i.next();
-	        this$1.addEdge(edge, edge);
-	      }
-	    } else if (arguments.length === 2) {
-	      var edges$1 = arguments[0];
-	      var edgeSet = arguments[1];
-	      for (var i$1 = edges$1.iterator(); i$1.hasNext();) {
-	        var edge$1 = i$1.next();
-	        this$1.addEdge(edge$1, edgeSet);
-	      }
-	    }
-	  };
-	  SimpleMCSweepLineIntersector.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  SimpleMCSweepLineIntersector.prototype.getClass = function getClass () {
-	    return SimpleMCSweepLineIntersector
-	  };
+	    switch (_typeof(value)) {
+	      case "string":
+	        return quote(value);
 
-	  return SimpleMCSweepLineIntersector;
-	}(EdgeSetIntersector));
+	      case "number":
+	        // JSON numbers must be finite. Encode non-finite numbers as null.
+	        return isFinite(value) ? String(value) : "null";
 
-	var IntervalRTreeNode = function IntervalRTreeNode () {
-	  this._min = Double.POSITIVE_INFINITY;
-	  this._max = Double.NEGATIVE_INFINITY;
-	};
+	      case "boolean":
+	      case "null":
+	        // If the value is a boolean or null, convert it to a string. Note:
+	        // typeof null does not produce "null". The case is included here in
+	        // the remote chance that this gets fixed someday.
+	        return String(value);
+	      // If the type is "object", we might be dealing with an object or an array or
+	      // null.
 
-	var staticAccessors$45 = { NodeComparator: { configurable: true } };
-	IntervalRTreeNode.prototype.getMin = function getMin () {
-	  return this._min
-	};
-	IntervalRTreeNode.prototype.intersects = function intersects (queryMin, queryMax) {
-	  if (this._min > queryMax || this._max < queryMin) { return false }
-	  return true
-	};
-	IntervalRTreeNode.prototype.getMax = function getMax () {
-	  return this._max
-	};
-	IntervalRTreeNode.prototype.toString = function toString () {
-	  return WKTWriter.toLineString(new Coordinate(this._min, 0), new Coordinate(this._max, 0))
-	};
-	IntervalRTreeNode.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	IntervalRTreeNode.prototype.getClass = function getClass () {
-	  return IntervalRTreeNode
-	};
-	staticAccessors$45.NodeComparator.get = function () { return NodeComparator };
+	      case "object":
+	        // Due to a specification blunder in ECMAScript, typeof null is "object",
+	        // so watch out for that case.
+	        if (!value) {
+	          return "null";
+	        } // Make an array to hold the partial results of stringifying this object value.
 
-	Object.defineProperties( IntervalRTreeNode, staticAccessors$45 );
 
-	var NodeComparator = function NodeComparator () {};
+	        gap += indent;
+	        partial = []; // Is the value an array?
 
-	NodeComparator.prototype.compare = function compare (o1, o2) {
-	  var n1 = o1;
-	  var n2 = o2;
-	  var mid1 = (n1._min + n1._max) / 2;
-	  var mid2 = (n2._min + n2._max) / 2;
-	  if (mid1 < mid2) { return -1 }
-	  if (mid1 > mid2) { return 1 }
-	  return 0
-	};
-	NodeComparator.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparator]
-	};
-	NodeComparator.prototype.getClass = function getClass () {
-	  return NodeComparator
-	};
+	        if (Object.prototype.toString.apply(value) === "[object Array]") {
+	          // The value is an array. Stringify every element. Use null as a placeholder
+	          // for non-JSON values.
+	          length = value.length;
 
-	var IntervalRTreeLeafNode = (function (IntervalRTreeNode$$1) {
-	  function IntervalRTreeLeafNode () {
-	    IntervalRTreeNode$$1.call(this);
-	    this._item = null;
-	    var min = arguments[0];
-	    var max = arguments[1];
-	    var item = arguments[2];
-	    this._min = min;
-	    this._max = max;
-	    this._item = item;
-	  }
+	          for (i = 0; i < length; i += 1) {
+	            partial[i] = str(i, value) || "null";
+	          } // Join all of the elements together, separated with commas, and wrap them in
+	          // brackets.
 
-	  if ( IntervalRTreeNode$$1 ) { IntervalRTreeLeafNode.__proto__ = IntervalRTreeNode$$1; }
-	  IntervalRTreeLeafNode.prototype = Object.create( IntervalRTreeNode$$1 && IntervalRTreeNode$$1.prototype );
-	  IntervalRTreeLeafNode.prototype.constructor = IntervalRTreeLeafNode;
-	  IntervalRTreeLeafNode.prototype.query = function query (queryMin, queryMax, visitor) {
-	    if (!this.intersects(queryMin, queryMax)) { return null }
-	    visitor.visitItem(this._item);
-	  };
-	  IntervalRTreeLeafNode.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  IntervalRTreeLeafNode.prototype.getClass = function getClass () {
-	    return IntervalRTreeLeafNode
-	  };
 
-	  return IntervalRTreeLeafNode;
-	}(IntervalRTreeNode));
+	          v = partial.length === 0 ? "[]" : gap ? "[\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "]" : "[" + partial.join(",") + "]";
+	          gap = mind;
+	          return v;
+	        } // If the replacer is an array, use it to select the members to be stringified.
 
-	var IntervalRTreeBranchNode = (function (IntervalRTreeNode$$1) {
-	  function IntervalRTreeBranchNode () {
-	    IntervalRTreeNode$$1.call(this);
-	    this._node1 = null;
-	    this._node2 = null;
-	    var n1 = arguments[0];
-	    var n2 = arguments[1];
-	    this._node1 = n1;
-	    this._node2 = n2;
-	    this.buildExtent(this._node1, this._node2);
-	  }
 
-	  if ( IntervalRTreeNode$$1 ) { IntervalRTreeBranchNode.__proto__ = IntervalRTreeNode$$1; }
-	  IntervalRTreeBranchNode.prototype = Object.create( IntervalRTreeNode$$1 && IntervalRTreeNode$$1.prototype );
-	  IntervalRTreeBranchNode.prototype.constructor = IntervalRTreeBranchNode;
-	  IntervalRTreeBranchNode.prototype.buildExtent = function buildExtent (n1, n2) {
-	    this._min = Math.min(n1._min, n2._min);
-	    this._max = Math.max(n1._max, n2._max);
-	  };
-	  IntervalRTreeBranchNode.prototype.query = function query (queryMin, queryMax, visitor) {
-	    if (!this.intersects(queryMin, queryMax)) {
-	      return null
-	    }
-	    if (this._node1 !== null) { this._node1.query(queryMin, queryMax, visitor); }
-	    if (this._node2 !== null) { this._node2.query(queryMin, queryMax, visitor); }
-	  };
-	  IntervalRTreeBranchNode.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  IntervalRTreeBranchNode.prototype.getClass = function getClass () {
-	    return IntervalRTreeBranchNode
-	  };
+	        if (rep && _typeof(rep) === "object") {
+	          length = rep.length;
 
-	  return IntervalRTreeBranchNode;
-	}(IntervalRTreeNode));
+	          for (i = 0; i < length; i += 1) {
+	            if (typeof rep[i] === "string") {
+	              k = rep[i];
+	              v = str(k, value);
 
-	var SortedPackedIntervalRTree = function SortedPackedIntervalRTree () {
-	  this._leaves = new ArrayList();
-	  this._root = null;
-	  this._level = 0;
-	};
-	SortedPackedIntervalRTree.prototype.buildTree = function buildTree () {
-	    var this$1 = this;
+	              if (v) {
+	                partial.push(quote(k) + (gap ? ": " : ":") + v);
+	              }
+	            }
+	          }
+	        } else {
+	          // Otherwise, iterate through all of the keys in the object.
+	          for (k in value) {
+	            if (Object.prototype.hasOwnProperty.call(value, k)) {
+	              v = str(k, value);
 
-	  Collections.sort(this._leaves, new IntervalRTreeNode.NodeComparator());
-	  var src = this._leaves;
-	  var temp = null;
-	  var dest = new ArrayList();
-	  while (true) {
-	    this$1.buildLevel(src, dest);
-	    if (dest.size() === 1) { return dest.get(0) }
-	    temp = src;
-	    src = dest;
-	    dest = temp;
-	  }
-	};
-	SortedPackedIntervalRTree.prototype.insert = function insert (min, max, item) {
-	  if (this._root !== null) { throw new Error('Index cannot be added to once it has been queried') }
-	  this._leaves.add(new IntervalRTreeLeafNode(min, max, item));
-	};
-	SortedPackedIntervalRTree.prototype.query = function query (min, max, visitor) {
-	  this.init();
-	  this._root.query(min, max, visitor);
-	};
-	SortedPackedIntervalRTree.prototype.buildRoot = function buildRoot () {
-	  if (this._root !== null) { return null }
-	  this._root = this.buildTree();
-	};
-	SortedPackedIntervalRTree.prototype.printNode = function printNode (node) {
-	  System.out.println(WKTWriter.toLineString(new Coordinate(node._min, this._level), new Coordinate(node._max, this._level)));
-	};
-	SortedPackedIntervalRTree.prototype.init = function init () {
-	  if (this._root !== null) { return null }
-	  this.buildRoot();
-	};
-	SortedPackedIntervalRTree.prototype.buildLevel = function buildLevel (src, dest) {
-	  this._level++;
-	  dest.clear();
-	  for (var i = 0; i < src.size(); i += 2) {
-	    var n1 = src.get(i);
-	    var n2 = i + 1 < src.size() ? src.get(i) : null;
-	    if (n2 === null) {
-	      dest.add(n1);
-	    } else {
-	      var node = new IntervalRTreeBranchNode(src.get(i), src.get(i + 1));
-	      dest.add(node);
-	    }
-	  }
-	};
-	SortedPackedIntervalRTree.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SortedPackedIntervalRTree.prototype.getClass = function getClass () {
-	  return SortedPackedIntervalRTree
-	};
+	              if (v) {
+	                partial.push(quote(k) + (gap ? ": " : ":") + v);
+	              }
+	            }
+	          }
+	        } // Join all of the member texts together, separated with commas,
+	        // and wrap them in braces.
 
-	var ArrayListVisitor = function ArrayListVisitor () {
-	  this._items = new ArrayList();
-	};
-	ArrayListVisitor.prototype.visitItem = function visitItem (item) {
-	  this._items.add(item);
-	};
-	ArrayListVisitor.prototype.getItems = function getItems () {
-	  return this._items
-	};
-	ArrayListVisitor.prototype.interfaces_ = function interfaces_ () {
-	  return [ItemVisitor]
-	};
-	ArrayListVisitor.prototype.getClass = function getClass () {
-	  return ArrayListVisitor
-	};
 
-	var IndexedPointInAreaLocator = function IndexedPointInAreaLocator () {
-	  this._index = null;
-	  var g = arguments[0];
-	  if (!hasInterface(g, Polygonal)) { throw new IllegalArgumentException('Argument must be Polygonal') }
-	  this._index = new IntervalIndexedGeometry(g);
-	};
+	        v = partial.length === 0 ? "{}" : gap ? "{\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "}" : "{" + partial.join(",") + "}";
+	        gap = mind;
+	        return v;
+	    }
+	  } // If the JSON object does not yet have a stringify method, give it one.
 
-	var staticAccessors$44 = { SegmentVisitor: { configurable: true },IntervalIndexedGeometry: { configurable: true } };
-	IndexedPointInAreaLocator.prototype.locate = function locate (p) {
-	  var rcc = new RayCrossingCounter(p);
-	  var visitor = new SegmentVisitor(rcc);
-	  this._index.query(p.y, p.y, visitor);
-	  return rcc.getLocation()
-	};
-	IndexedPointInAreaLocator.prototype.interfaces_ = function interfaces_ () {
-	  return [PointOnGeometryLocator]
-	};
-	IndexedPointInAreaLocator.prototype.getClass = function getClass () {
-	  return IndexedPointInAreaLocator
-	};
-	staticAccessors$44.SegmentVisitor.get = function () { return SegmentVisitor };
-	staticAccessors$44.IntervalIndexedGeometry.get = function () { return IntervalIndexedGeometry };
 
-	Object.defineProperties( IndexedPointInAreaLocator, staticAccessors$44 );
+	  if (typeof JSON.stringify !== "function") {
+	    meta = {
+	      // table of character substitutions
+	      "\b": "\\b",
+	      "\t": "\\t",
+	      "\n": "\\n",
+	      "\f": "\\f",
+	      "\r": "\\r",
+	      "\"": "\\\"",
+	      "\\": "\\\\"
+	    };
 
-	var SegmentVisitor = function SegmentVisitor () {
-	  this._counter = null;
-	  var counter = arguments[0];
-	  this._counter = counter;
-	};
-	SegmentVisitor.prototype.visitItem = function visitItem (item) {
-	  var seg = item;
-	  this._counter.countSegment(seg.getCoordinate(0), seg.getCoordinate(1));
-	};
-	SegmentVisitor.prototype.interfaces_ = function interfaces_ () {
-	  return [ItemVisitor]
-	};
-	SegmentVisitor.prototype.getClass = function getClass () {
-	  return SegmentVisitor
-	};
+	    JSON.stringify = function (value, replacer, space) {
+	      // The stringify method takes a value and an optional replacer, and an optional
+	      // space parameter, and returns a JSON text. The replacer can be a function
+	      // that can replace values, or an array of strings that will select the keys.
+	      // A default replacer method can be provided. Use of the space parameter can
+	      // produce text that is more easily readable.
+	      var i;
+	      gap = "";
+	      indent = ""; // If the space parameter is a number, make an indent string containing that
+	      // many spaces.
 
-	var IntervalIndexedGeometry = function IntervalIndexedGeometry () {
-	  this._index = new SortedPackedIntervalRTree();
-	  var geom = arguments[0];
-	  this.init(geom);
-	};
-	IntervalIndexedGeometry.prototype.init = function init (geom) {
-	    var this$1 = this;
+	      if (typeof space === "number") {
+	        for (i = 0; i < space; i += 1) {
+	          indent += " ";
+	        } // If the space parameter is a string, it will be used as the indent string.
 
-	  var lines = LinearComponentExtracter.getLines(geom);
-	  for (var i = lines.iterator(); i.hasNext();) {
-	    var line = i.next();
-	    var pts = line.getCoordinates();
-	    this$1.addLine(pts);
-	  }
-	};
-	IntervalIndexedGeometry.prototype.addLine = function addLine (pts) {
-	    var this$1 = this;
+	      } else if (typeof space === "string") {
+	        indent = space;
+	      } // If there is a replacer, it must be a function or an array.
+	      // Otherwise, throw an error.
 
-	  for (var i = 1; i < pts.length; i++) {
-	    var seg = new LineSegment(pts[i - 1], pts[i]);
-	    var min = Math.min(seg.p0.y, seg.p1.y);
-	    var max = Math.max(seg.p0.y, seg.p1.y);
-	    this$1._index.insert(min, max, seg);
-	  }
-	};
-	IntervalIndexedGeometry.prototype.query = function query () {
-	  if (arguments.length === 2) {
-	    var min = arguments[0];
-	    var max = arguments[1];
-	    var visitor = new ArrayListVisitor();
-	    this._index.query(min, max, visitor);
-	    return visitor.getItems()
-	  } else if (arguments.length === 3) {
-	    var min$1 = arguments[0];
-	    var max$1 = arguments[1];
-	    var visitor$1 = arguments[2];
-	    this._index.query(min$1, max$1, visitor$1);
-	  }
-	};
-	IntervalIndexedGeometry.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	IntervalIndexedGeometry.prototype.getClass = function getClass () {
-	  return IntervalIndexedGeometry
-	};
 
-	var GeometryGraph = (function (PlanarGraph$$1) {
-	  function GeometryGraph () {
-	    PlanarGraph$$1.call(this);
-	    this._parentGeom = null;
-	    this._lineEdgeMap = new HashMap();
-	    this._boundaryNodeRule = null;
-	    this._useBoundaryDeterminationRule = true;
-	    this._argIndex = null;
-	    this._boundaryNodes = null;
-	    this._hasTooFewPoints = false;
-	    this._invalidPoint = null;
-	    this._areaPtLocator = null;
-	    this._ptLocator = new PointLocator();
-	    if (arguments.length === 2) {
-	      var argIndex = arguments[0];
-	      var parentGeom = arguments[1];
-	      var boundaryNodeRule = BoundaryNodeRule.OGC_SFS_BOUNDARY_RULE;
-	      this._argIndex = argIndex;
-	      this._parentGeom = parentGeom;
-	      this._boundaryNodeRule = boundaryNodeRule;
-	      if (parentGeom !== null) {
-	        this.add(parentGeom);
-	      }
-	    } else if (arguments.length === 3) {
-	      var argIndex$1 = arguments[0];
-	      var parentGeom$1 = arguments[1];
-	      var boundaryNodeRule$1 = arguments[2];
-	      this._argIndex = argIndex$1;
-	      this._parentGeom = parentGeom$1;
-	      this._boundaryNodeRule = boundaryNodeRule$1;
-	      if (parentGeom$1 !== null) {
-	        this.add(parentGeom$1);
-	      }
-	    }
-	  }
-
-	  if ( PlanarGraph$$1 ) { GeometryGraph.__proto__ = PlanarGraph$$1; }
-	  GeometryGraph.prototype = Object.create( PlanarGraph$$1 && PlanarGraph$$1.prototype );
-	  GeometryGraph.prototype.constructor = GeometryGraph;
-	  GeometryGraph.prototype.insertBoundaryPoint = function insertBoundaryPoint (argIndex, coord) {
-	    var n = this._nodes.addNode(coord);
-	    var lbl = n.getLabel();
-	    var boundaryCount = 1;
-	    var loc = Location.NONE;
-	    loc = lbl.getLocation(argIndex, Position.ON);
-	    if (loc === Location.BOUNDARY) { boundaryCount++; }
-	    var newLoc = GeometryGraph.determineBoundary(this._boundaryNodeRule, boundaryCount);
-	    lbl.setLocation(argIndex, newLoc);
-	  };
-	  GeometryGraph.prototype.computeSelfNodes = function computeSelfNodes () {
-	    if (arguments.length === 2) {
-	      var li = arguments[0];
-	      var computeRingSelfNodes = arguments[1];
-	      return this.computeSelfNodes(li, computeRingSelfNodes, false)
-	    } else if (arguments.length === 3) {
-	      var li$1 = arguments[0];
-	      var computeRingSelfNodes$1 = arguments[1];
-	      var isDoneIfProperInt = arguments[2];
-	      var si = new SegmentIntersector$2(li$1, true, false);
-	      si.setIsDoneIfProperInt(isDoneIfProperInt);
-	      var esi = this.createEdgeSetIntersector();
-	      var isRings = this._parentGeom instanceof LinearRing || this._parentGeom instanceof Polygon || this._parentGeom instanceof MultiPolygon;
-	      var computeAllSegments = computeRingSelfNodes$1 || !isRings;
-	      esi.computeIntersections(this._edges, si, computeAllSegments);
-	      this.addSelfIntersectionNodes(this._argIndex);
-	      return si
-	    }
-	  };
-	  GeometryGraph.prototype.computeSplitEdges = function computeSplitEdges (edgelist) {
-	    for (var i = this._edges.iterator(); i.hasNext();) {
-	      var e = i.next();
-	      e.eiList.addSplitEdges(edgelist);
-	    }
-	  };
-	  GeometryGraph.prototype.computeEdgeIntersections = function computeEdgeIntersections (g, li, includeProper) {
-	    var si = new SegmentIntersector$2(li, includeProper, true);
-	    si.setBoundaryNodes(this.getBoundaryNodes(), g.getBoundaryNodes());
-	    var esi = this.createEdgeSetIntersector();
-	    esi.computeIntersections(this._edges, g._edges, si);
-	    return si
-	  };
-	  GeometryGraph.prototype.getGeometry = function getGeometry () {
-	    return this._parentGeom
-	  };
-	  GeometryGraph.prototype.getBoundaryNodeRule = function getBoundaryNodeRule () {
-	    return this._boundaryNodeRule
-	  };
-	  GeometryGraph.prototype.hasTooFewPoints = function hasTooFewPoints () {
-	    return this._hasTooFewPoints
-	  };
-	  GeometryGraph.prototype.addPoint = function addPoint () {
-	    if (arguments[0] instanceof Point$1) {
-	      var p = arguments[0];
-	      var coord = p.getCoordinate();
-	      this.insertPoint(this._argIndex, coord, Location.INTERIOR);
-	    } else if (arguments[0] instanceof Coordinate) {
-	      var pt = arguments[0];
-	      this.insertPoint(this._argIndex, pt, Location.INTERIOR);
-	    }
-	  };
-	  GeometryGraph.prototype.addPolygon = function addPolygon (p) {
-	    var this$1 = this;
-
-	    this.addPolygonRing(p.getExteriorRing(), Location.EXTERIOR, Location.INTERIOR);
-	    for (var i = 0; i < p.getNumInteriorRing(); i++) {
-	      var hole = p.getInteriorRingN(i);
-	      this$1.addPolygonRing(hole, Location.INTERIOR, Location.EXTERIOR);
-	    }
-	  };
-	  GeometryGraph.prototype.addEdge = function addEdge (e) {
-	    this.insertEdge(e);
-	    var coord = e.getCoordinates();
-	    this.insertPoint(this._argIndex, coord[0], Location.BOUNDARY);
-	    this.insertPoint(this._argIndex, coord[coord.length - 1], Location.BOUNDARY);
-	  };
-	  GeometryGraph.prototype.addLineString = function addLineString (line) {
-	    var coord = CoordinateArrays.removeRepeatedPoints(line.getCoordinates());
-	    if (coord.length < 2) {
-	      this._hasTooFewPoints = true;
-	      this._invalidPoint = coord[0];
-	      return null
-	    }
-	    var e = new Edge(coord, new Label(this._argIndex, Location.INTERIOR));
-	    this._lineEdgeMap.put(line, e);
-	    this.insertEdge(e);
-	    Assert.isTrue(coord.length >= 2, 'found LineString with single point');
-	    this.insertBoundaryPoint(this._argIndex, coord[0]);
-	    this.insertBoundaryPoint(this._argIndex, coord[coord.length - 1]);
-	  };
-	  GeometryGraph.prototype.getInvalidPoint = function getInvalidPoint () {
-	    return this._invalidPoint
-	  };
-	  GeometryGraph.prototype.getBoundaryPoints = function getBoundaryPoints () {
-	    var coll = this.getBoundaryNodes();
-	    var pts = new Array(coll.size()).fill(null);
-	    var i = 0;
-	    for (var it = coll.iterator(); it.hasNext();) {
-	      var node = it.next();
-	      pts[i++] = node.getCoordinate().copy();
-	    }
-	    return pts
-	  };
-	  GeometryGraph.prototype.getBoundaryNodes = function getBoundaryNodes () {
-	    if (this._boundaryNodes === null) { this._boundaryNodes = this._nodes.getBoundaryNodes(this._argIndex); }
-	    return this._boundaryNodes
-	  };
-	  GeometryGraph.prototype.addSelfIntersectionNode = function addSelfIntersectionNode (argIndex, coord, loc) {
-	    if (this.isBoundaryNode(argIndex, coord)) { return null }
-	    if (loc === Location.BOUNDARY && this._useBoundaryDeterminationRule) { this.insertBoundaryPoint(argIndex, coord); } else { this.insertPoint(argIndex, coord, loc); }
-	  };
-	  GeometryGraph.prototype.addPolygonRing = function addPolygonRing (lr, cwLeft, cwRight) {
-	    if (lr.isEmpty()) { return null }
-	    var coord = CoordinateArrays.removeRepeatedPoints(lr.getCoordinates());
-	    if (coord.length < 4) {
-	      this._hasTooFewPoints = true;
-	      this._invalidPoint = coord[0];
-	      return null
-	    }
-	    var left = cwLeft;
-	    var right = cwRight;
-	    if (CGAlgorithms.isCCW(coord)) {
-	      left = cwRight;
-	      right = cwLeft;
-	    }
-	    var e = new Edge(coord, new Label(this._argIndex, Location.BOUNDARY, left, right));
-	    this._lineEdgeMap.put(lr, e);
-	    this.insertEdge(e);
-	    this.insertPoint(this._argIndex, coord[0], Location.BOUNDARY);
-	  };
-	  GeometryGraph.prototype.insertPoint = function insertPoint (argIndex, coord, onLocation) {
-	    var n = this._nodes.addNode(coord);
-	    var lbl = n.getLabel();
-	    if (lbl === null) {
-	      n._label = new Label(argIndex, onLocation);
-	    } else { lbl.setLocation(argIndex, onLocation); }
-	  };
-	  GeometryGraph.prototype.createEdgeSetIntersector = function createEdgeSetIntersector () {
-	    return new SimpleMCSweepLineIntersector()
-	  };
-	  GeometryGraph.prototype.addSelfIntersectionNodes = function addSelfIntersectionNodes (argIndex) {
-	    var this$1 = this;
-
-	    for (var i = this._edges.iterator(); i.hasNext();) {
-	      var e = i.next();
-	      var eLoc = e.getLabel().getLocation(argIndex);
-	      for (var eiIt = e.eiList.iterator(); eiIt.hasNext();) {
-	        var ei = eiIt.next();
-	        this$1.addSelfIntersectionNode(argIndex, ei.coord, eLoc);
-	      }
-	    }
-	  };
-	  GeometryGraph.prototype.add = function add () {
-	    if (arguments.length === 1) {
-	      var g = arguments[0];
-	      if (g.isEmpty()) { return null }
-	      if (g instanceof MultiPolygon) { this._useBoundaryDeterminationRule = false; }
-	      if (g instanceof Polygon) { this.addPolygon(g); }
-	      else if (g instanceof LineString) { this.addLineString(g); }
-	      else if (g instanceof Point$1) { this.addPoint(g); }
-	      else if (g instanceof MultiPoint) { this.addCollection(g); }
-	      else if (g instanceof MultiLineString) { this.addCollection(g); }
-	      else if (g instanceof MultiPolygon) { this.addCollection(g); }
-	      else if (g instanceof GeometryCollection) { this.addCollection(g); }
-	      else { throw new Error(g.getClass().getName()) }
-	    } else { return PlanarGraph$$1.prototype.add.apply(this, arguments) }
-	  };
-	  GeometryGraph.prototype.addCollection = function addCollection (gc) {
-	    var this$1 = this;
-
-	    for (var i = 0; i < gc.getNumGeometries(); i++) {
-	      var g = gc.getGeometryN(i);
-	      this$1.add(g);
-	    }
-	  };
-	  GeometryGraph.prototype.locate = function locate (pt) {
-	    if (hasInterface(this._parentGeom, Polygonal) && this._parentGeom.getNumGeometries() > 50) {
-	      if (this._areaPtLocator === null) {
-	        this._areaPtLocator = new IndexedPointInAreaLocator(this._parentGeom);
-	      }
-	      return this._areaPtLocator.locate(pt)
-	    }
-	    return this._ptLocator.locate(pt, this._parentGeom)
-	  };
-	  GeometryGraph.prototype.findEdge = function findEdge () {
-	    if (arguments.length === 1) {
-	      var line = arguments[0];
-	      return this._lineEdgeMap.get(line)
-	    } else { return PlanarGraph$$1.prototype.findEdge.apply(this, arguments) }
-	  };
-	  GeometryGraph.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  GeometryGraph.prototype.getClass = function getClass () {
-	    return GeometryGraph
-	  };
-	  GeometryGraph.determineBoundary = function determineBoundary (boundaryNodeRule, boundaryCount) {
-	    return boundaryNodeRule.isInBoundary(boundaryCount) ? Location.BOUNDARY : Location.INTERIOR
-	  };
-
-	  return GeometryGraph;
-	}(PlanarGraph));
-
-	var GeometryGraphOp = function GeometryGraphOp () {
-	  this._li = new RobustLineIntersector();
-	  this._resultPrecisionModel = null;
-	  this._arg = null;
-	  if (arguments.length === 1) {
-	    var g0 = arguments[0];
-	    this.setComputationPrecision(g0.getPrecisionModel());
-	    this._arg = new Array(1).fill(null);
-	    this._arg[0] = new GeometryGraph(0, g0);
-	  } else if (arguments.length === 2) {
-	    var g0$1 = arguments[0];
-	    var g1 = arguments[1];
-	    var boundaryNodeRule = BoundaryNodeRule.OGC_SFS_BOUNDARY_RULE;
-	    if (g0$1.getPrecisionModel().compareTo(g1.getPrecisionModel()) >= 0) { this.setComputationPrecision(g0$1.getPrecisionModel()); } else { this.setComputationPrecision(g1.getPrecisionModel()); }
-	    this._arg = new Array(2).fill(null);
-	    this._arg[0] = new GeometryGraph(0, g0$1, boundaryNodeRule);
-	    this._arg[1] = new GeometryGraph(1, g1, boundaryNodeRule);
-	  } else if (arguments.length === 3) {
-	    var g0$2 = arguments[0];
-	    var g1$1 = arguments[1];
-	    var boundaryNodeRule$1 = arguments[2];
-	    if (g0$2.getPrecisionModel().compareTo(g1$1.getPrecisionModel()) >= 0) { this.setComputationPrecision(g0$2.getPrecisionModel()); } else { this.setComputationPrecision(g1$1.getPrecisionModel()); }
-	    this._arg = new Array(2).fill(null);
-	    this._arg[0] = new GeometryGraph(0, g0$2, boundaryNodeRule$1);
-	    this._arg[1] = new GeometryGraph(1, g1$1, boundaryNodeRule$1);
-	  }
-	};
-	GeometryGraphOp.prototype.getArgGeometry = function getArgGeometry (i) {
-	  return this._arg[i].getGeometry()
-	};
-	GeometryGraphOp.prototype.setComputationPrecision = function setComputationPrecision (pm) {
-	  this._resultPrecisionModel = pm;
-	  this._li.setPrecisionModel(this._resultPrecisionModel);
-	};
-	GeometryGraphOp.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryGraphOp.prototype.getClass = function getClass () {
-	  return GeometryGraphOp
-	};
+	      rep = replacer;
 
-	// operation.geometrygraph
+	      if (replacer && typeof replacer !== "function" && (_typeof(replacer) !== "object" || typeof replacer.length !== "number")) {
+	        throw new Error("JSON.stringify");
+	      } // Make a fake root object containing our value under the key of "".
+	      // Return the result of stringifying the value.
 
-	var GeometryMapper = function GeometryMapper () {};
 
-	GeometryMapper.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryMapper.prototype.getClass = function getClass () {
-	  return GeometryMapper
-	};
-	GeometryMapper.map = function map () {
-	  if (arguments[0] instanceof Geometry && hasInterface(arguments[1], GeometryMapper.MapOp)) {
-	    var geom = arguments[0];
-	    var op = arguments[1];
-	    var mapped = new ArrayList();
-	    for (var i = 0; i < geom.getNumGeometries(); i++) {
-	      var g = op.map(geom.getGeometryN(i));
-	      if (g !== null) { mapped.add(g); }
-	    }
-	    return geom.getFactory().buildGeometry(mapped)
-	  } else if (hasInterface(arguments[0], Collection) && hasInterface(arguments[1], GeometryMapper.MapOp)) {
-	    var geoms = arguments[0];
-	    var op$1 = arguments[1];
-	    var mapped$1 = new ArrayList();
-	    for (var i$1 = geoms.iterator(); i$1.hasNext();) {
-	      var g$1 = i$1.next();
-	      var gr = op$1.map(g$1);
-	      if (gr !== null) { mapped$1.add(gr); }
-	    }
-	    return mapped$1
-	  }
-	};
-	GeometryMapper.MapOp = function MapOp () {};
-
-	var OverlayOp = (function (GeometryGraphOp) {
-	  function OverlayOp () {
-	    var g0 = arguments[0];
-	    var g1 = arguments[1];
-	    GeometryGraphOp.call(this, g0, g1);
-	    this._ptLocator = new PointLocator();
-	    this._geomFact = null;
-	    this._resultGeom = null;
-	    this._graph = null;
-	    this._edgeList = new EdgeList();
-	    this._resultPolyList = new ArrayList();
-	    this._resultLineList = new ArrayList();
-	    this._resultPointList = new ArrayList();
-	    this._graph = new PlanarGraph(new OverlayNodeFactory());
-	    this._geomFact = g0.getFactory();
-	  }
-
-	  if ( GeometryGraphOp ) { OverlayOp.__proto__ = GeometryGraphOp; }
-	  OverlayOp.prototype = Object.create( GeometryGraphOp && GeometryGraphOp.prototype );
-	  OverlayOp.prototype.constructor = OverlayOp;
-	  OverlayOp.prototype.insertUniqueEdge = function insertUniqueEdge (e) {
-	    var existingEdge = this._edgeList.findEqualEdge(e);
-	    if (existingEdge !== null) {
-	      var existingLabel = existingEdge.getLabel();
-	      var labelToMerge = e.getLabel();
-	      if (!existingEdge.isPointwiseEqual(e)) {
-	        labelToMerge = new Label(e.getLabel());
-	        labelToMerge.flip();
-	      }
-	      var depth = existingEdge.getDepth();
-	      if (depth.isNull()) {
-	        depth.add(existingLabel);
-	      }
-	      depth.add(labelToMerge);
-	      existingLabel.merge(labelToMerge);
-	    } else {
-	      this._edgeList.add(e);
-	    }
-	  };
-	  OverlayOp.prototype.getGraph = function getGraph () {
-	    return this._graph
-	  };
-	  OverlayOp.prototype.cancelDuplicateResultEdges = function cancelDuplicateResultEdges () {
-	    for (var it = this._graph.getEdgeEnds().iterator(); it.hasNext();) {
-	      var de = it.next();
-	      var sym = de.getSym();
-	      if (de.isInResult() && sym.isInResult()) {
-	        de.setInResult(false);
-	        sym.setInResult(false);
-	      }
-	    }
-	  };
-	  OverlayOp.prototype.isCoveredByLA = function isCoveredByLA (coord) {
-	    if (this.isCovered(coord, this._resultLineList)) { return true }
-	    if (this.isCovered(coord, this._resultPolyList)) { return true }
-	    return false
-	  };
-	  OverlayOp.prototype.computeGeometry = function computeGeometry (resultPointList, resultLineList, resultPolyList, opcode) {
-	    var geomList = new ArrayList();
-	    geomList.addAll(resultPointList);
-	    geomList.addAll(resultLineList);
-	    geomList.addAll(resultPolyList);
-	    if (geomList.isEmpty()) { return OverlayOp.createEmptyResult(opcode, this._arg[0].getGeometry(), this._arg[1].getGeometry(), this._geomFact) }
-	    return this._geomFact.buildGeometry(geomList)
-	  };
-	  OverlayOp.prototype.mergeSymLabels = function mergeSymLabels () {
-	    for (var nodeit = this._graph.getNodes().iterator(); nodeit.hasNext();) {
-	      var node = nodeit.next();
-	      node.getEdges().mergeSymLabels();
-	    }
-	  };
-	  OverlayOp.prototype.isCovered = function isCovered (coord, geomList) {
-	    var this$1 = this;
-
-	    for (var it = geomList.iterator(); it.hasNext();) {
-	      var geom = it.next();
-	      var loc = this$1._ptLocator.locate(coord, geom);
-	      if (loc !== Location.EXTERIOR) { return true }
-	    }
-	    return false
-	  };
-	  OverlayOp.prototype.replaceCollapsedEdges = function replaceCollapsedEdges () {
-	    var newEdges = new ArrayList();
-	    for (var it = this._edgeList.iterator(); it.hasNext();) {
-	      var e = it.next();
-	      if (e.isCollapsed()) {
-	        it.remove();
-	        newEdges.add(e.getCollapsedEdge());
-	      }
-	    }
-	    this._edgeList.addAll(newEdges);
-	  };
-	  OverlayOp.prototype.updateNodeLabelling = function updateNodeLabelling () {
-	    for (var nodeit = this._graph.getNodes().iterator(); nodeit.hasNext();) {
-	      var node = nodeit.next();
-	      var lbl = node.getEdges().getLabel();
-	      node.getLabel().merge(lbl);
-	    }
-	  };
-	  OverlayOp.prototype.getResultGeometry = function getResultGeometry (overlayOpCode) {
-	    this.computeOverlay(overlayOpCode);
-	    return this._resultGeom
-	  };
-	  OverlayOp.prototype.insertUniqueEdges = function insertUniqueEdges (edges) {
-	    var this$1 = this;
-
-	    for (var i = edges.iterator(); i.hasNext();) {
-	      var e = i.next();
-	      this$1.insertUniqueEdge(e);
-	    }
-	  };
-	  OverlayOp.prototype.computeOverlay = function computeOverlay (opCode) {
-	    this.copyPoints(0);
-	    this.copyPoints(1);
-	    this._arg[0].computeSelfNodes(this._li, false);
-	    this._arg[1].computeSelfNodes(this._li, false);
-	    this._arg[0].computeEdgeIntersections(this._arg[1], this._li, true);
-	    var baseSplitEdges = new ArrayList();
-	    this._arg[0].computeSplitEdges(baseSplitEdges);
-	    this._arg[1].computeSplitEdges(baseSplitEdges);
-	    // const splitEdges = baseSplitEdges
-	    this.insertUniqueEdges(baseSplitEdges);
-	    this.computeLabelsFromDepths();
-	    this.replaceCollapsedEdges();
-	    EdgeNodingValidator.checkValid(this._edgeList.getEdges());
-	    this._graph.addEdges(this._edgeList.getEdges());
-	    this.computeLabelling();
-	    this.labelIncompleteNodes();
-	    this.findResultAreaEdges(opCode);
-	    this.cancelDuplicateResultEdges();
-	    var polyBuilder = new PolygonBuilder(this._geomFact);
-	    polyBuilder.add(this._graph);
-	    this._resultPolyList = polyBuilder.getPolygons();
-	    var lineBuilder = new LineBuilder(this, this._geomFact, this._ptLocator);
-	    this._resultLineList = lineBuilder.build(opCode);
-	    var pointBuilder = new PointBuilder(this, this._geomFact, this._ptLocator);
-	    this._resultPointList = pointBuilder.build(opCode);
-	    this._resultGeom = this.computeGeometry(this._resultPointList, this._resultLineList, this._resultPolyList, opCode);
-	  };
-	  OverlayOp.prototype.labelIncompleteNode = function labelIncompleteNode (n, targetIndex) {
-	    var loc = this._ptLocator.locate(n.getCoordinate(), this._arg[targetIndex].getGeometry());
-	    n.getLabel().setLocation(targetIndex, loc);
-	  };
-	  OverlayOp.prototype.copyPoints = function copyPoints (argIndex) {
-	    var this$1 = this;
-
-	    for (var i = this._arg[argIndex].getNodeIterator(); i.hasNext();) {
-	      var graphNode = i.next();
-	      var newNode = this$1._graph.addNode(graphNode.getCoordinate());
-	      newNode.setLabel(argIndex, graphNode.getLabel().getLocation(argIndex));
-	    }
-	  };
-	  OverlayOp.prototype.findResultAreaEdges = function findResultAreaEdges (opCode) {
-	    for (var it = this._graph.getEdgeEnds().iterator(); it.hasNext();) {
-	      var de = it.next();
-	      var label = de.getLabel();
-	      if (label.isArea() && !de.isInteriorAreaEdge() && OverlayOp.isResultOfOp(label.getLocation(0, Position.RIGHT), label.getLocation(1, Position.RIGHT), opCode)) {
-	        de.setInResult(true);
-	      }
-	    }
-	  };
-	  OverlayOp.prototype.computeLabelsFromDepths = function computeLabelsFromDepths () {
-	    for (var it = this._edgeList.iterator(); it.hasNext();) {
-	      var e = it.next();
-	      var lbl = e.getLabel();
-	      var depth = e.getDepth();
-	      if (!depth.isNull()) {
-	        depth.normalize();
-	        for (var i = 0; i < 2; i++) {
-	          if (!lbl.isNull(i) && lbl.isArea() && !depth.isNull(i)) {
-	            if (depth.getDelta(i) === 0) {
-	              lbl.toLine(i);
-	            } else {
-	              Assert.isTrue(!depth.isNull(i, Position.LEFT), 'depth of LEFT side has not been initialized');
-	              lbl.setLocation(i, Position.LEFT, depth.getLocation(i, Position.LEFT));
-	              Assert.isTrue(!depth.isNull(i, Position.RIGHT), 'depth of RIGHT side has not been initialized');
-	              lbl.setLocation(i, Position.RIGHT, depth.getLocation(i, Position.RIGHT));
-	            }
-	          }
-	        }
-	      }
-	    }
-	  };
-	  OverlayOp.prototype.computeLabelling = function computeLabelling () {
-	    var this$1 = this;
+	      return str("", {
+	        "": value
+	      });
+	    };
+	  } // If the JSON object does not yet have a parse method, give it one.
 
-	    for (var nodeit = this._graph.getNodes().iterator(); nodeit.hasNext();) {
-	      var node = nodeit.next();
-	      node.getEdges().computeLabelling(this$1._arg);
-	    }
-	    this.mergeSymLabels();
-	    this.updateNodeLabelling();
-	  };
-	  OverlayOp.prototype.labelIncompleteNodes = function labelIncompleteNodes () {
-	    var this$1 = this;
 
-	    // let nodeCount = 0
-	    for (var ni = this._graph.getNodes().iterator(); ni.hasNext();) {
-	      var n = ni.next();
-	      var label = n.getLabel();
-	      if (n.isIsolated()) {
-	        // nodeCount++
-	        if (label.isNull(0)) { this$1.labelIncompleteNode(n, 0); } else { this$1.labelIncompleteNode(n, 1); }
-	      }
-	      n.getEdges().updateLabelling(label);
-	    }
-	  };
-	  OverlayOp.prototype.isCoveredByA = function isCoveredByA (coord) {
-	    if (this.isCovered(coord, this._resultPolyList)) { return true }
-	    return false
-	  };
-	  OverlayOp.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  OverlayOp.prototype.getClass = function getClass () {
-	    return OverlayOp
-	  };
+	  if (typeof JSON.parse !== "function") {
+	    JSON.parse = function (text, reviver) {
+	      // The parse method takes a text and an optional reviver function, and returns
+	      // a JavaScript value if the text is a valid JSON text.
+	      var j;
 
-	  return OverlayOp;
-	}(GeometryGraphOp));
+	      function walk(holder, key) {
+	        // The walk method is used to recursively walk the resulting structure so
+	        // that modifications can be made.
+	        var k;
+	        var v;
+	        var value = holder[key];
 
-	OverlayOp.overlayOp = function (geom0, geom1, opCode) {
-	  var gov = new OverlayOp(geom0, geom1);
-	  var geomOv = gov.getResultGeometry(opCode);
-	  return geomOv
-	};
-	OverlayOp.intersection = function (g, other) {
-	  if (g.isEmpty() || other.isEmpty()) { return OverlayOp.createEmptyResult(OverlayOp.INTERSECTION, g, other, g.getFactory()) }
-	  if (g.isGeometryCollection()) {
-	    var g2 = other;
-	    return GeometryCollectionMapper.map(g, {
-	      interfaces_: function () {
-	        return [GeometryMapper.MapOp]
-	      },
-	      map: function (g) {
-	        return g.intersection(g2)
-	      }
-	    })
-	  }
-	  g.checkNotGeometryCollection(g);
-	  g.checkNotGeometryCollection(other);
-	  return SnapIfNeededOverlayOp.overlayOp(g, other, OverlayOp.INTERSECTION)
-	};
-	OverlayOp.symDifference = function (g, other) {
-	  if (g.isEmpty() || other.isEmpty()) {
-	    if (g.isEmpty() && other.isEmpty()) { return OverlayOp.createEmptyResult(OverlayOp.SYMDIFFERENCE, g, other, g.getFactory()) }
-	    if (g.isEmpty()) { return other.copy() }
-	    if (other.isEmpty()) { return g.copy() }
-	  }
-	  g.checkNotGeometryCollection(g);
-	  g.checkNotGeometryCollection(other);
-	  return SnapIfNeededOverlayOp.overlayOp(g, other, OverlayOp.SYMDIFFERENCE)
-	};
-	OverlayOp.resultDimension = function (opCode, g0, g1) {
-	  var dim0 = g0.getDimension();
-	  var dim1 = g1.getDimension();
-	  var resultDimension = -1;
-	  switch (opCode) {
-	    case OverlayOp.INTERSECTION:
-	      resultDimension = Math.min(dim0, dim1);
-	      break
-	    case OverlayOp.UNION:
-	      resultDimension = Math.max(dim0, dim1);
-	      break
-	    case OverlayOp.DIFFERENCE:
-	      resultDimension = dim0;
-	      break
-	    case OverlayOp.SYMDIFFERENCE:
-	      resultDimension = Math.max(dim0, dim1);
-	      break
-	  }
-	  return resultDimension
-	};
-	OverlayOp.createEmptyResult = function (overlayOpCode, a, b, geomFact) {
-	  var result = null;
-	  switch (OverlayOp.resultDimension(overlayOpCode, a, b)) {
-	    case -1:
-	      result = geomFact.createGeometryCollection(new Array(0).fill(null));
-	      break
-	    case 0:
-	      result = geomFact.createPoint();
-	      break
-	    case 1:
-	      result = geomFact.createLineString();
-	      break
-	    case 2:
-	      result = geomFact.createPolygon();
-	      break
-	  }
-	  return result
-	};
-	OverlayOp.difference = function (g, other) {
-	  if (g.isEmpty()) { return OverlayOp.createEmptyResult(OverlayOp.DIFFERENCE, g, other, g.getFactory()) }
-	  if (other.isEmpty()) { return g.copy() }
-	  g.checkNotGeometryCollection(g);
-	  g.checkNotGeometryCollection(other);
-	  return SnapIfNeededOverlayOp.overlayOp(g, other, OverlayOp.DIFFERENCE)
-	};
-	OverlayOp.isResultOfOp = function () {
-	  if (arguments.length === 2) {
-	    var label = arguments[0];
-	    var opCode = arguments[1];
-	    var loc0 = label.getLocation(0);
-	    var loc1 = label.getLocation(1);
-	    return OverlayOp.isResultOfOp(loc0, loc1, opCode)
-	  } else if (arguments.length === 3) {
-	    var loc0$1 = arguments[0];
-	    var loc1$1 = arguments[1];
-	    var overlayOpCode = arguments[2];
-	    if (loc0$1 === Location.BOUNDARY) { loc0$1 = Location.INTERIOR; }
-	    if (loc1$1 === Location.BOUNDARY) { loc1$1 = Location.INTERIOR; }
-	    switch (overlayOpCode) {
-	      case OverlayOp.INTERSECTION:
-	        return loc0$1 === Location.INTERIOR && loc1$1 === Location.INTERIOR
-	      case OverlayOp.UNION:
-	        return loc0$1 === Location.INTERIOR || loc1$1 === Location.INTERIOR
-	      case OverlayOp.DIFFERENCE:
-	        return loc0$1 === Location.INTERIOR && loc1$1 !== Location.INTERIOR
-	      case OverlayOp.SYMDIFFERENCE:
-	        return (loc0$1 === Location.INTERIOR && loc1$1 !== Location.INTERIOR) || (loc0$1 !== Location.INTERIOR && loc1$1 === Location.INTERIOR)
-	    }
-	    return false
-	  }
-	};
-	OverlayOp.INTERSECTION = 1;
-	OverlayOp.UNION = 2;
-	OverlayOp.DIFFERENCE = 3;
-	OverlayOp.SYMDIFFERENCE = 4;
-
-	var FuzzyPointLocator = function FuzzyPointLocator () {
-	  this._g = null;
-	  this._boundaryDistanceTolerance = null;
-	  this._linework = null;
-	  this._ptLocator = new PointLocator();
-	  this._seg = new LineSegment();
-	  var g = arguments[0];
-	  var boundaryDistanceTolerance = arguments[1];
-	  this._g = g;
-	  this._boundaryDistanceTolerance = boundaryDistanceTolerance;
-	  this._linework = this.extractLinework(g);
-	};
-	FuzzyPointLocator.prototype.isWithinToleranceOfBoundary = function isWithinToleranceOfBoundary (pt) {
-	    var this$1 = this;
+	        if (value && _typeof(value) === "object") {
+	          for (k in value) {
+	            if (Object.prototype.hasOwnProperty.call(value, k)) {
+	              v = walk(value, k);
 
-	  for (var i = 0; i < this._linework.getNumGeometries(); i++) {
-	    var line = this$1._linework.getGeometryN(i);
-	    var seq = line.getCoordinateSequence();
-	    for (var j = 0; j < seq.size() - 1; j++) {
-	      seq.getCoordinate(j, this$1._seg.p0);
-	      seq.getCoordinate(j + 1, this$1._seg.p1);
-	      var dist = this$1._seg.distance(pt);
-	      if (dist <= this$1._boundaryDistanceTolerance) { return true }
-	    }
-	  }
-	  return false
-	};
-	FuzzyPointLocator.prototype.getLocation = function getLocation (pt) {
-	  if (this.isWithinToleranceOfBoundary(pt)) { return Location.BOUNDARY }
-	  return this._ptLocator.locate(pt, this._g)
-	};
-	FuzzyPointLocator.prototype.extractLinework = function extractLinework (g) {
-	  var extracter = new PolygonalLineworkExtracter();
-	  g.apply(extracter);
-	  var linework = extracter.getLinework();
-	  var lines = GeometryFactory.toLineStringArray(linework);
-	  return g.getFactory().createMultiLineString(lines)
-	};
-	FuzzyPointLocator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	FuzzyPointLocator.prototype.getClass = function getClass () {
-	  return FuzzyPointLocator
-	};
+	              if (v !== undefined) {
+	                value[k] = v;
+	              } else {
+	                delete value[k];
+	              }
+	            }
+	          }
+	        }
 
-	var PolygonalLineworkExtracter = function PolygonalLineworkExtracter () {
-	  this._linework = null;
-	  this._linework = new ArrayList();
-	};
-	PolygonalLineworkExtracter.prototype.getLinework = function getLinework () {
-	  return this._linework
-	};
-	PolygonalLineworkExtracter.prototype.filter = function filter (g) {
-	    var this$1 = this;
+	        return reviver.call(holder, key, value);
+	      } // Parsing happens in four stages. In the first stage, we replace certain
+	      // Unicode characters with escape sequences. JavaScript handles many characters
+	      // incorrectly, either silently deleting them, or treating them as line endings.
 
-	  if (g instanceof Polygon) {
-	    var poly = g;
-	    this._linework.add(poly.getExteriorRing());
-	    for (var i = 0; i < poly.getNumInteriorRing(); i++) {
-	      this$1._linework.add(poly.getInteriorRingN(i));
-	    }
-	  }
-	};
-	PolygonalLineworkExtracter.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryFilter]
-	};
-	PolygonalLineworkExtracter.prototype.getClass = function getClass () {
-	  return PolygonalLineworkExtracter
-	};
 
-	var OffsetPointGenerator = function OffsetPointGenerator () {
-	  this._g = null;
-	  this._doLeft = true;
-	  this._doRight = true;
-	  var g = arguments[0];
-	  this._g = g;
-	};
-	OffsetPointGenerator.prototype.extractPoints = function extractPoints (line, offsetDistance, offsetPts) {
-	    var this$1 = this;
+	      text = String(text);
+	      rx_dangerous.lastIndex = 0;
 
-	  var pts = line.getCoordinates();
-	  for (var i = 0; i < pts.length - 1; i++) {
-	    this$1.computeOffsetPoints(pts[i], pts[i + 1], offsetDistance, offsetPts);
-	  }
-	};
-	OffsetPointGenerator.prototype.setSidesToGenerate = function setSidesToGenerate (doLeft, doRight) {
-	  this._doLeft = doLeft;
-	  this._doRight = doRight;
-	};
-	OffsetPointGenerator.prototype.getPoints = function getPoints (offsetDistance) {
-	    var this$1 = this;
+	      if (rx_dangerous.test(text)) {
+	        text = text.replace(rx_dangerous, function (a) {
+	          return "\\u" + ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
+	        });
+	      } // In the second stage, we run the text against regular expressions that look
+	      // for non-JSON patterns. We are especially concerned with "()" and "new"
+	      // because they can cause invocation, and "=" because it can cause mutation.
+	      // But just to be safe, we want to reject all unexpected forms.
+	      // We split the second stage into 4 regexp operations in order to work around
+	      // crippling inefficiencies in IE's and Safari's regexp engines. First we
+	      // replace the JSON backslash pairs with "@" (a non-JSON character). Second, we
+	      // replace all simple value tokens with "]" characters. Third, we delete all
+	      // open brackets that follow a colon or comma or that begin the text. Finally,
+	      // we look to see that the remaining characters are only whitespace or "]" or
+	      // "," or ":" or "{" or "}". If that is so, then the text is safe for eval.
 
-	  var offsetPts = new ArrayList();
-	  var lines = LinearComponentExtracter.getLines(this._g);
-	  for (var i = lines.iterator(); i.hasNext();) {
-	    var line = i.next();
-	    this$1.extractPoints(line, offsetDistance, offsetPts);
-	  }
-	  return offsetPts
-	};
-	OffsetPointGenerator.prototype.computeOffsetPoints = function computeOffsetPoints (p0, p1, offsetDistance, offsetPts) {
-	  var dx = p1.x - p0.x;
-	  var dy = p1.y - p0.y;
-	  var len = Math.sqrt(dx * dx + dy * dy);
-	  var ux = offsetDistance * dx / len;
-	  var uy = offsetDistance * dy / len;
-	  var midX = (p1.x + p0.x) / 2;
-	  var midY = (p1.y + p0.y) / 2;
-	  if (this._doLeft) {
-	    var offsetLeft = new Coordinate(midX - uy, midY + ux);
-	    offsetPts.add(offsetLeft);
-	  }
-	  if (this._doRight) {
-	    var offsetRight = new Coordinate(midX + uy, midY - ux);
-	    offsetPts.add(offsetRight);
-	  }
-	};
-	OffsetPointGenerator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	OffsetPointGenerator.prototype.getClass = function getClass () {
-	  return OffsetPointGenerator
-	};
 
-	var OverlayResultValidator = function OverlayResultValidator () {
-	  this._geom = null;
-	  this._locFinder = null;
-	  this._location = new Array(3).fill(null);
-	  this._invalidLocation = null;
-	  this._boundaryDistanceTolerance = OverlayResultValidator.TOLERANCE;
-	  this._testCoords = new ArrayList();
-	  var a = arguments[0];
-	  var b = arguments[1];
-	  var result = arguments[2];
-	  this._boundaryDistanceTolerance = OverlayResultValidator.computeBoundaryDistanceTolerance(a, b);
-	  this._geom = [a, b, result];
-	  this._locFinder = [new FuzzyPointLocator(this._geom[0], this._boundaryDistanceTolerance), new FuzzyPointLocator(this._geom[1], this._boundaryDistanceTolerance), new FuzzyPointLocator(this._geom[2], this._boundaryDistanceTolerance)];
-	};
+	      if (rx_one.test(text.replace(rx_two, "@").replace(rx_three, "]").replace(rx_four, ""))) {
+	        // In the third stage we use the eval function to compile the text into a
+	        // JavaScript structure. The "{" operator is subject to a syntactic ambiguity
+	        // in JavaScript: it can begin a block or an object literal. We wrap the text
+	        // in parens to eliminate the ambiguity.
+	        j = eval("(" + text + ")"); // In the optional fourth stage, we recursively walk the new structure, passing
+	        // each name/value pair to a reviver function for possible transformation.
 
-	var staticAccessors$46 = { TOLERANCE: { configurable: true } };
-	OverlayResultValidator.prototype.reportResult = function reportResult (overlayOp, location, expectedInterior) {
-	  System.out.println('Overlay result invalid - A:' + Location.toLocationSymbol(location[0]) + ' B:' + Location.toLocationSymbol(location[1]) + ' expected:' + (expectedInterior ? 'i' : 'e') + ' actual:' + Location.toLocationSymbol(location[2]));
-	};
-	OverlayResultValidator.prototype.isValid = function isValid (overlayOp) {
-	  this.addTestPts(this._geom[0]);
-	  this.addTestPts(this._geom[1]);
-	  var isValid = this.checkValid(overlayOp);
-	  return isValid
-	};
-	OverlayResultValidator.prototype.checkValid = function checkValid () {
-	    var this$1 = this;
+	        return typeof reviver === "function" ? walk({
+	          "": j
+	        }, "") : j;
+	      } // If the text is not JSON parseable, then a SyntaxError is thrown.
 
-	  if (arguments.length === 1) {
-	    var overlayOp = arguments[0];
-	    for (var i = 0; i < this._testCoords.size(); i++) {
-	      var pt = this$1._testCoords.get(i);
-	      if (!this$1.checkValid(overlayOp, pt)) {
-	        this$1._invalidLocation = pt;
-	        return false
-	      }
-	    }
-	    return true
-	  } else if (arguments.length === 2) {
-	    var overlayOp$1 = arguments[0];
-	    var pt$1 = arguments[1];
-	    this._location[0] = this._locFinder[0].getLocation(pt$1);
-	    this._location[1] = this._locFinder[1].getLocation(pt$1);
-	    this._location[2] = this._locFinder[2].getLocation(pt$1);
-	    if (OverlayResultValidator.hasLocation(this._location, Location.BOUNDARY)) { return true }
-	    return this.isValidResult(overlayOp$1, this._location)
-	  }
-	};
-	OverlayResultValidator.prototype.addTestPts = function addTestPts (g) {
-	  var ptGen = new OffsetPointGenerator(g);
-	  this._testCoords.addAll(ptGen.getPoints(5 * this._boundaryDistanceTolerance));
-	};
-	OverlayResultValidator.prototype.isValidResult = function isValidResult (overlayOp, location) {
-	  var expectedInterior = OverlayOp.isResultOfOp(location[0], location[1], overlayOp);
-	  var resultInInterior = location[2] === Location.INTERIOR;
-	  var isValid = !(expectedInterior ^ resultInInterior);
-	  if (!isValid) { this.reportResult(overlayOp, location, expectedInterior); }
-	  return isValid
-	};
-	OverlayResultValidator.prototype.getInvalidLocation = function getInvalidLocation () {
-	  return this._invalidLocation
-	};
-	OverlayResultValidator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	OverlayResultValidator.prototype.getClass = function getClass () {
-	  return OverlayResultValidator
-	};
-	OverlayResultValidator.hasLocation = function hasLocation (location, loc) {
-	  for (var i = 0; i < 3; i++) {
-	    if (location[i] === loc) { return true }
-	  }
-	  return false
-	};
-	OverlayResultValidator.computeBoundaryDistanceTolerance = function computeBoundaryDistanceTolerance (g0, g1) {
-	  return Math.min(GeometrySnapper.computeSizeBasedSnapTolerance(g0), GeometrySnapper.computeSizeBasedSnapTolerance(g1))
-	};
-	OverlayResultValidator.isValid = function isValid (a, b, overlayOp, result) {
-	  var validator = new OverlayResultValidator(a, b, result);
-	  return validator.isValid(overlayOp)
-	};
-	staticAccessors$46.TOLERANCE.get = function () { return 0.000001 };
 
-	Object.defineProperties( OverlayResultValidator, staticAccessors$46 );
+	      throw new SyntaxError("JSON.parse");
+	    };
+	  }
+	})();
 
-	// operation.overlay
+	var json2 = json2Plugin;
 
-	var GeometryCombiner = function GeometryCombiner (geoms) {
-	  this._geomFactory = null;
-	  this._skipEmpty = false;
-	  this._inputGeoms = null;
-	  this._geomFactory = GeometryCombiner.extractFactory(geoms);
-	  this._inputGeoms = geoms;
-	};
-	GeometryCombiner.prototype.extractElements = function extractElements (geom, elems) {
-	    var this$1 = this;
+	function json2Plugin() {
+	  return {};
+	}
 
-	  if (geom === null) { return null }
-	  for (var i = 0; i < geom.getNumGeometries(); i++) {
-	    var elemGeom = geom.getGeometryN(i);
-	    if (this$1._skipEmpty && elemGeom.isEmpty()) { continue }
-	    elems.add(elemGeom);
-	  }
-	};
-	GeometryCombiner.prototype.combine = function combine () {
-	    var this$1 = this;
+	var engine = storeEngine;
+	var storages = all;
+	var plugins = [json2];
+	var store_legacy = engine.createStore(storages, plugins);
 
-	  var elems = new ArrayList();
-	  for (var i = this._inputGeoms.iterator(); i.hasNext();) {
-	    var g = i.next();
-	    this$1.extractElements(g, elems);
-	  }
-	  if (elems.size() === 0) {
-	    if (this._geomFactory !== null) {
-	      return this._geomFactory.createGeometryCollection(null)
-	    }
-	    return null
-	  }
-	  return this._geomFactory.buildGeometry(elems)
-	};
-	GeometryCombiner.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryCombiner.prototype.getClass = function getClass () {
-	  return GeometryCombiner
-	};
-	GeometryCombiner.combine = function combine () {
-	  if (arguments.length === 1) {
-	    var geoms = arguments[0];
-	    var combiner = new GeometryCombiner(geoms);
-	    return combiner.combine()
-	  } else if (arguments.length === 2) {
-	    var g0 = arguments[0];
-	    var g1 = arguments[1];
-	    var combiner$1 = new GeometryCombiner(GeometryCombiner.createList(g0, g1));
-	    return combiner$1.combine()
-	  } else if (arguments.length === 3) {
-	    var g0$1 = arguments[0];
-	    var g1$1 = arguments[1];
-	    var g2 = arguments[2];
-	    var combiner$2 = new GeometryCombiner(GeometryCombiner.createList(g0$1, g1$1, g2));
-	    return combiner$2.combine()
-	  }
-	};
-	GeometryCombiner.extractFactory = function extractFactory (geoms) {
-	  if (geoms.isEmpty()) { return null }
-	  return geoms.iterator().next().getFactory()
-	};
-	GeometryCombiner.createList = function createList () {
-	  if (arguments.length === 2) {
-	    var obj0 = arguments[0];
-	    var obj1 = arguments[1];
-	    var list = new ArrayList();
-	    list.add(obj0);
-	    list.add(obj1);
-	    return list
-	  } else if (arguments.length === 3) {
-	    var obj0$1 = arguments[0];
-	    var obj1$1 = arguments[1];
-	    var obj2 = arguments[2];
-	    var list$1 = new ArrayList();
-	    list$1.add(obj0$1);
-	    list$1.add(obj1$1);
-	    list$1.add(obj2);
-	    return list$1
-	  }
-	};
+	var immutable = extend;
+	var hasOwnProperty = Object.prototype.hasOwnProperty;
 
-	var CascadedPolygonUnion = function CascadedPolygonUnion () {
-	  this._inputPolys = null;
-	  this._geomFactory = null;
-	  var polys = arguments[0];
-	  this._inputPolys = polys;
-	  if (this._inputPolys === null) { this._inputPolys = new ArrayList(); }
-	};
+	function extend() {
+	  var target = {};
 
-	var staticAccessors$47 = { STRTREE_NODE_CAPACITY: { configurable: true } };
-	CascadedPolygonUnion.prototype.reduceToGeometries = function reduceToGeometries (geomTree) {
-	    var this$1 = this;
+	  for (var i = 0; i < arguments.length; i++) {
+	    var source = arguments[i];
 
-	  var geoms = new ArrayList();
-	  for (var i = geomTree.iterator(); i.hasNext();) {
-	    var o = i.next();
-	    var geom = null;
-	    if (hasInterface(o, List)) {
-	      geom = this$1.unionTree(o);
-	    } else if (o instanceof Geometry) {
-	      geom = o;
-	    }
-	    geoms.add(geom);
-	  }
-	  return geoms
-	};
-	CascadedPolygonUnion.prototype.extractByEnvelope = function extractByEnvelope (env, geom, disjointGeoms) {
-	  var intersectingGeoms = new ArrayList();
-	  for (var i = 0; i < geom.getNumGeometries(); i++) {
-	    var elem = geom.getGeometryN(i);
-	    if (elem.getEnvelopeInternal().intersects(env)) { intersectingGeoms.add(elem); } else { disjointGeoms.add(elem); }
-	  }
-	  return this._geomFactory.buildGeometry(intersectingGeoms)
-	};
-	CascadedPolygonUnion.prototype.unionOptimized = function unionOptimized (g0, g1) {
-	  var g0Env = g0.getEnvelopeInternal();
-	  var g1Env = g1.getEnvelopeInternal();
-	  if (!g0Env.intersects(g1Env)) {
-	    var combo = GeometryCombiner.combine(g0, g1);
-	    return combo
-	  }
-	  if (g0.getNumGeometries() <= 1 && g1.getNumGeometries() <= 1) { return this.unionActual(g0, g1) }
-	  var commonEnv = g0Env.intersection(g1Env);
-	  return this.unionUsingEnvelopeIntersection(g0, g1, commonEnv)
-	};
-	CascadedPolygonUnion.prototype.union = function union () {
-	  if (this._inputPolys === null) { throw new Error('union() method cannot be called twice') }
-	  if (this._inputPolys.isEmpty()) { return null }
-	  this._geomFactory = this._inputPolys.iterator().next().getFactory();
-	  var index = new STRtree(CascadedPolygonUnion.STRTREE_NODE_CAPACITY);
-	  for (var i = this._inputPolys.iterator(); i.hasNext();) {
-	    var item = i.next();
-	    index.insert(item.getEnvelopeInternal(), item);
-	  }
-	  this._inputPolys = null;
-	  var itemTree = index.itemsTree();
-	  var unionAll = this.unionTree(itemTree);
-	  return unionAll
-	};
-	CascadedPolygonUnion.prototype.binaryUnion = function binaryUnion () {
-	  if (arguments.length === 1) {
-	    var geoms = arguments[0];
-	    return this.binaryUnion(geoms, 0, geoms.size())
-	  } else if (arguments.length === 3) {
-	    var geoms$1 = arguments[0];
-	    var start = arguments[1];
-	    var end = arguments[2];
-	    if (end - start <= 1) {
-	      var g0 = CascadedPolygonUnion.getGeometry(geoms$1, start);
-	      return this.unionSafe(g0, null)
-	    } else if (end - start === 2) {
-	      return this.unionSafe(CascadedPolygonUnion.getGeometry(geoms$1, start), CascadedPolygonUnion.getGeometry(geoms$1, start + 1))
-	    } else {
-	      var mid = Math.trunc((end + start) / 2);
-	      var g0$1 = this.binaryUnion(geoms$1, start, mid);
-	      var g1 = this.binaryUnion(geoms$1, mid, end);
-	      return this.unionSafe(g0$1, g1)
+	    for (var key in source) {
+	      if (hasOwnProperty.call(source, key)) {
+	        target[key] = source[key];
+	      }
 	    }
 	  }
-	};
-	CascadedPolygonUnion.prototype.repeatedUnion = function repeatedUnion (geoms) {
-	  var union = null;
-	  for (var i = geoms.iterator(); i.hasNext();) {
-	    var g = i.next();
-	    if (union === null) { union = g.copy(); } else { union = union.union(g); }
-	  }
-	  return union
-	};
-	CascadedPolygonUnion.prototype.unionSafe = function unionSafe (g0, g1) {
-	  if (g0 === null && g1 === null) { return null }
-	  if (g0 === null) { return g1.copy() }
-	  if (g1 === null) { return g0.copy() }
-	  return this.unionOptimized(g0, g1)
-	};
-	CascadedPolygonUnion.prototype.unionActual = function unionActual (g0, g1) {
-	  return CascadedPolygonUnion.restrictToPolygons(g0.union(g1))
-	};
-	CascadedPolygonUnion.prototype.unionTree = function unionTree (geomTree) {
-	  var geoms = this.reduceToGeometries(geomTree);
-	  var union = this.binaryUnion(geoms);
-	  return union
-	};
-	CascadedPolygonUnion.prototype.unionUsingEnvelopeIntersection = function unionUsingEnvelopeIntersection (g0, g1, common) {
-	  var disjointPolys = new ArrayList();
-	  var g0Int = this.extractByEnvelope(common, g0, disjointPolys);
-	  var g1Int = this.extractByEnvelope(common, g1, disjointPolys);
-	  var union = this.unionActual(g0Int, g1Int);
-	  disjointPolys.add(union);
-	  var overallUnion = GeometryCombiner.combine(disjointPolys);
-	  return overallUnion
-	};
-	CascadedPolygonUnion.prototype.bufferUnion = function bufferUnion () {
-	  if (arguments.length === 1) {
-	    var geoms = arguments[0];
-	    var factory = geoms.get(0).getFactory();
-	    var gColl = factory.buildGeometry(geoms);
-	    var unionAll = gColl.buffer(0.0);
-	    return unionAll
-	  } else if (arguments.length === 2) {
-	    var g0 = arguments[0];
-	    var g1 = arguments[1];
-	    var factory$1 = g0.getFactory();
-	    var gColl$1 = factory$1.createGeometryCollection([g0, g1]);
-	    var unionAll$1 = gColl$1.buffer(0.0);
-	    return unionAll$1
-	  }
-	};
-	CascadedPolygonUnion.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CascadedPolygonUnion.prototype.getClass = function getClass () {
-	  return CascadedPolygonUnion
-	};
-	CascadedPolygonUnion.restrictToPolygons = function restrictToPolygons (g) {
-	  if (hasInterface(g, Polygonal)) {
-	    return g
-	  }
-	  var polygons = PolygonExtracter.getPolygons(g);
-	  if (polygons.size() === 1) { return polygons.get(0) }
-	  return g.getFactory().createMultiPolygon(GeometryFactory.toPolygonArray(polygons))
-	};
-	CascadedPolygonUnion.getGeometry = function getGeometry (list, index) {
-	  if (index >= list.size()) { return null }
-	  return list.get(index)
-	};
-	CascadedPolygonUnion.union = function union (polys) {
-	  var op = new CascadedPolygonUnion(polys);
-	  return op.union()
-	};
-	staticAccessors$47.STRTREE_NODE_CAPACITY.get = function () { return 4 };
 
-	Object.defineProperties( CascadedPolygonUnion, staticAccessors$47 );
+	  return target;
+	}
 
-	var UnionOp = function UnionOp () {};
+	var ohauth = ohauth_1;
+	var resolveUrl = resolveUrl$1.exports;
+	var store = store_legacy;
+	var xtend = immutable; // # osm-auth
+	//
+	// This code is only compatible with IE10+ because the [XDomainRequest](http://bit.ly/LfO7xo)
+	// object, IE<10's idea of [CORS](http://en.wikipedia.org/wiki/Cross-origin_resource_sharing),
+	// does not support custom headers, which this uses everywhere.
 
-	UnionOp.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	UnionOp.prototype.getClass = function getClass () {
-	  return UnionOp
-	};
-	UnionOp.union = function union (g, other) {
-	  if (g.isEmpty() || other.isEmpty()) {
-	    if (g.isEmpty() && other.isEmpty()) { return OverlayOp.createEmptyResult(OverlayOp.UNION, g, other, g.getFactory()) }
-	    if (g.isEmpty()) { return other.copy() }
-	    if (other.isEmpty()) { return g.copy() }
-	  }
-	  g.checkNotGeometryCollection(g);
-	  g.checkNotGeometryCollection(other);
-	  return SnapIfNeededOverlayOp.overlayOp(g, other, OverlayOp.UNION)
-	};
+	var osmAuth = function osmAuth(o) {
+	  var oauth = {}; // authenticated users will also have a request token secret, but it's
+	  // not used in transactions with the server
 
-	/**
-	 * Earth Radius used with the Harvesine formula and approximates using a spherical (non-ellipsoid) Earth.
-	 */
+	  oauth.authenticated = function () {
+	    return !!(token('oauth_token') && token('oauth_token_secret'));
+	  };
 
-	/**
-	 * Wraps a GeoJSON {@link Geometry} in a GeoJSON {@link Feature}.
-	 *
-	 * @name feature
-	 * @param {Geometry} geometry input geometry
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature} a GeoJSON Feature
-	 * @example
-	 * var geometry = {
-	 *   "type": "Point",
-	 *   "coordinates": [110, 50]
-	 * };
-	 *
-	 * var feature = turf.feature(geometry);
-	 *
-	 * //=feature
-	 */
-	function feature$1(geometry, properties, options) {
-	    // Optional Parameters
-	    options = options || {};
-	    if (!isObject$4(options)) { throw new Error('options is invalid'); }
-	    var bbox = options.bbox;
-	    var id = options.id;
+	  oauth.logout = function () {
+	    token('oauth_token', '');
+	    token('oauth_token_secret', '');
+	    token('oauth_request_token_secret', '');
+	    return oauth;
+	  }; // TODO: detect lack of click event
+
+
+	  oauth.authenticate = function (callback) {
+	    if (oauth.authenticated()) return callback();
+	    oauth.logout(); // ## Getting a request token
+
+	    var params = timenonce(getAuth(o)),
+	        url = o.url + '/oauth/request_token';
+	    params.oauth_signature = ohauth.signature(o.oauth_secret, '', ohauth.baseString('POST', url, params));
+
+	    if (!o.singlepage) {
+	      // Create a 600x550 popup window in the center of the screen
+	      var w = 600,
+	          h = 550,
+	          settings = [['width', w], ['height', h], ['left', screen.width / 2 - w / 2], ['top', screen.height / 2 - h / 2]].map(function (x) {
+	        return x.join('=');
+	      }).join(','),
+	          popup = window.open('about:blank', 'oauth_window', settings);
+	      oauth.popupWindow = popup;
+
+	      if (!popup) {
+	        var error = new Error('Popup was blocked');
+	        error.status = 'popup-blocked';
+	        throw error;
+	      }
+	    } // Request a request token. When this is complete, the popup
+	    // window is redirected to OSM's authorization page.
 
-	    // Validation
-	    if (geometry === undefined) { throw new Error('geometry is required'); }
-	    if (properties && properties.constructor !== Object) { throw new Error('properties must be an Object'); }
-	    if (bbox) { validateBBox(bbox); }
-	    if (id) { validateId(id); }
 
-	    // Main
-	    var feat = {type: 'Feature'};
-	    if (id) { feat.id = id; }
-	    if (bbox) { feat.bbox = bbox; }
-	    feat.properties = properties || {};
-	    feat.geometry = geometry;
-	    return feat;
-	}
+	    ohauth.xhr('POST', url, params, null, {}, reqTokenDone);
+	    o.loading();
 
-	/**
-	 * isNumber
-	 *
-	 * @param {*} num Number to validate
-	 * @returns {boolean} true/false
-	 * @example
-	 * turf.isNumber(123)
-	 * //=true
-	 * turf.isNumber('foo')
-	 * //=false
-	 */
-	function isNumber$1(num) {
-	    return !isNaN(num) && num !== null && !Array.isArray(num);
-	}
+	    function reqTokenDone(err, xhr) {
+	      o.done();
+	      if (err) return callback(err);
+	      var resp = ohauth.stringQs(xhr.response);
+	      token('oauth_request_token_secret', resp.oauth_token_secret);
+	      var authorize_url = o.url + '/oauth/authorize?' + ohauth.qsString({
+	        oauth_token: resp.oauth_token,
+	        oauth_callback: resolveUrl(o.landing)
+	      });
 
-	/**
-	 * isObject
-	 *
-	 * @param {*} input variable to validate
-	 * @returns {boolean} true/false
-	 * @example
-	 * turf.isObject({elevation: 10})
-	 * //=true
-	 * turf.isObject('foo')
-	 * //=false
-	 */
-	function isObject$4(input) {
-	    return (!!input) && (input.constructor === Object);
-	}
+	      if (o.singlepage) {
+	        location.href = authorize_url;
+	      } else {
+	        popup.location = authorize_url;
+	      }
+	    } // Called by a function in a landing page, in the popup window. The
+	    // window closes itself.
 
-	/**
-	 * Validate BBox
-	 *
-	 * @private
-	 * @param {Array<number>} bbox BBox to validate
-	 * @returns {void}
-	 * @throws Error if BBox is not valid
-	 * @example
-	 * validateBBox([-180, -40, 110, 50])
-	 * //=OK
-	 * validateBBox([-180, -40])
-	 * //=Error
-	 * validateBBox('Foo')
-	 * //=Error
-	 * validateBBox(5)
-	 * //=Error
-	 * validateBBox(null)
-	 * //=Error
-	 * validateBBox(undefined)
-	 * //=Error
-	 */
-	function validateBBox(bbox) {
-	    if (!bbox) { throw new Error('bbox is required'); }
-	    if (!Array.isArray(bbox)) { throw new Error('bbox must be an Array'); }
-	    if (bbox.length !== 4 && bbox.length !== 6) { throw new Error('bbox must be an Array of 4 or 6 numbers'); }
-	    bbox.forEach(function (num) {
-	        if (!isNumber$1(num)) { throw new Error('bbox must only contain numbers'); }
-	    });
-	}
 
-	/**
-	 * Validate Id
-	 *
-	 * @private
-	 * @param {string|number} id Id to validate
-	 * @returns {void}
-	 * @throws Error if Id is not valid
-	 * @example
-	 * validateId([-180, -40, 110, 50])
-	 * //=Error
-	 * validateId([-180, -40])
-	 * //=Error
-	 * validateId('Foo')
-	 * //=OK
-	 * validateId(5)
-	 * //=OK
-	 * validateId(null)
-	 * //=Error
-	 * validateId(undefined)
-	 * //=Error
-	 */
-	function validateId(id) {
-	    if (!id) { throw new Error('id is required'); }
-	    if (['string', 'number'].indexOf(typeof id) === -1) { throw new Error('id must be a number or a string'); }
-	}
+	    window.authComplete = function (token) {
+	      var oauth_token = ohauth.stringQs(token.split('?')[1]);
+	      get_access_token(oauth_token.oauth_token);
+	      delete window.authComplete;
+	    }; // ## Getting an request token
+	    //
+	    // At this point we have an `oauth_token`, brought in from a function
+	    // call on a landing page popup.
 
-	/**
-	 * Callback for geomEach
-	 *
-	 * @callback geomEachCallback
-	 * @param {Geometry} currentGeometry The current Geometry being processed.
-	 * @param {number} featureIndex The current index of the Feature being processed.
-	 * @param {Object} featureProperties The current Feature Properties being processed.
-	 * @param {Array<number>} featureBBox The current Feature BBox being processed.
-	 * @param {number|string} featureId The current Feature Id being processed.
-	 */
 
-	/**
-	 * Iterate over each geometry in any GeoJSON object, similar to Array.forEach()
-	 *
-	 * @name geomEach
-	 * @param {FeatureCollection|Feature|Geometry} geojson any GeoJSON object
-	 * @param {Function} callback a method that takes (currentGeometry, featureIndex, featureProperties, featureBBox, featureId)
-	 * @returns {void}
-	 * @example
-	 * var features = turf.featureCollection([
-	 *     turf.point([26, 37], {foo: 'bar'}),
-	 *     turf.point([36, 53], {hello: 'world'})
-	 * ]);
-	 *
-	 * turf.geomEach(features, function (currentGeometry, featureIndex, featureProperties, featureBBox, featureId) {
-	 *   //=currentGeometry
-	 *   //=featureIndex
-	 *   //=featureProperties
-	 *   //=featureBBox
-	 *   //=featureId
-	 * });
-	 */
-	function geomEach(geojson, callback) {
-	    var i, j, g, geometry, stopG,
-	        geometryMaybeCollection,
-	        isGeometryCollection,
-	        featureProperties,
-	        featureBBox,
-	        featureId,
-	        featureIndex = 0,
-	        isFeatureCollection = geojson.type === 'FeatureCollection',
-	        isFeature = geojson.type === 'Feature',
-	        stop = isFeatureCollection ? geojson.features.length : 1;
-
-	    // This logic may look a little weird. The reason why it is that way
-	    // is because it's trying to be fast. GeoJSON supports multiple kinds
-	    // of objects at its root: FeatureCollection, Features, Geometries.
-	    // This function has the responsibility of handling all of them, and that
-	    // means that some of the `for` loops you see below actually just don't apply
-	    // to certain inputs. For instance, if you give this just a
-	    // Point geometry, then both loops are short-circuited and all we do
-	    // is gradually rename the input until it's called 'geometry'.
-	    //
-	    // This also aims to allocate as few resources as possible: just a
-	    // few numbers and booleans, rather than any temporary arrays as would
-	    // be required with the normalization approach.
-	    for (i = 0; i < stop; i++) {
-
-	        geometryMaybeCollection = (isFeatureCollection ? geojson.features[i].geometry :
-	            (isFeature ? geojson.geometry : geojson));
-	        featureProperties = (isFeatureCollection ? geojson.features[i].properties :
-	            (isFeature ? geojson.properties : {}));
-	        featureBBox = (isFeatureCollection ? geojson.features[i].bbox :
-	            (isFeature ? geojson.bbox : undefined));
-	        featureId = (isFeatureCollection ? geojson.features[i].id :
-	            (isFeature ? geojson.id : undefined));
-	        isGeometryCollection = (geometryMaybeCollection) ? geometryMaybeCollection.type === 'GeometryCollection' : false;
-	        stopG = isGeometryCollection ? geometryMaybeCollection.geometries.length : 1;
-
-	        for (g = 0; g < stopG; g++) {
-	            geometry = isGeometryCollection ?
-	                geometryMaybeCollection.geometries[g] : geometryMaybeCollection;
-
-	            // Handle null Geometry
-	            if (geometry === null) {
-	                if (callback(null, featureIndex, featureProperties, featureBBox, featureId) === false) { return false; }
-	                continue;
-	            }
-	            switch (geometry.type) {
-	            case 'Point':
-	            case 'LineString':
-	            case 'MultiPoint':
-	            case 'Polygon':
-	            case 'MultiLineString':
-	            case 'MultiPolygon': {
-	                if (callback(geometry, featureIndex, featureProperties, featureBBox, featureId) === false) { return false; }
-	                break;
-	            }
-	            case 'GeometryCollection': {
-	                for (j = 0; j < geometry.geometries.length; j++) {
-	                    if (callback(geometry.geometries[j], featureIndex, featureProperties, featureBBox, featureId) === false) { return false; }
-	                }
-	                break;
-	            }
-	            default:
-	                throw new Error('Unknown Geometry Type');
-	            }
-	        }
-	        // Only increase `featureIndex` per each feature
-	        featureIndex++;
+	    function get_access_token(oauth_token) {
+	      var url = o.url + '/oauth/access_token',
+	          params = timenonce(getAuth(o)),
+	          request_token_secret = token('oauth_request_token_secret');
+	      params.oauth_token = oauth_token;
+	      params.oauth_signature = ohauth.signature(o.oauth_secret, request_token_secret, ohauth.baseString('POST', url, params)); // ## Getting an access token
+	      //
+	      // The final token required for authentication. At this point
+	      // we have a `request token secret`
+
+	      ohauth.xhr('POST', url, params, null, {}, accessTokenDone);
+	      o.loading();
 	    }
-	}
 
-	/**
-	 * Callback for geomReduce
-	 *
-	 * The first time the callback function is called, the values provided as arguments depend
-	 * on whether the reduce method has an initialValue argument.
-	 *
-	 * If an initialValue is provided to the reduce method:
-	 *  - The previousValue argument is initialValue.
-	 *  - The currentValue argument is the value of the first element present in the array.
-	 *
-	 * If an initialValue is not provided:
-	 *  - The previousValue argument is the value of the first element present in the array.
-	 *  - The currentValue argument is the value of the second element present in the array.
-	 *
-	 * @callback geomReduceCallback
-	 * @param {*} previousValue The accumulated value previously returned in the last invocation
-	 * of the callback, or initialValue, if supplied.
-	 * @param {Geometry} currentGeometry The current Geometry being processed.
-	 * @param {number} featureIndex The current index of the Feature being processed.
-	 * @param {Object} featureProperties The current Feature Properties being processed.
-	 * @param {Array<number>} featureBBox The current Feature BBox being processed.
-	 * @param {number|string} featureId The current Feature Id being processed.
-	 */
+	    function accessTokenDone(err, xhr) {
+	      o.done();
+	      if (err) return callback(err);
+	      var access_token = ohauth.stringQs(xhr.response);
+	      token('oauth_token', access_token.oauth_token);
+	      token('oauth_token_secret', access_token.oauth_token_secret);
+	      callback(null, oauth);
+	    }
+	  };
 
-	/**
-	 * Reduce geometry in any GeoJSON object, similar to Array.reduce().
-	 *
-	 * @name geomReduce
-	 * @param {FeatureCollection|Feature|Geometry} geojson any GeoJSON object
-	 * @param {Function} callback a method that takes (previousValue, currentGeometry, featureIndex, featureProperties, featureBBox, featureId)
-	 * @param {*} [initialValue] Value to use as the first argument to the first call of the callback.
-	 * @returns {*} The value that results from the reduction.
-	 * @example
-	 * var features = turf.featureCollection([
-	 *     turf.point([26, 37], {foo: 'bar'}),
-	 *     turf.point([36, 53], {hello: 'world'})
-	 * ]);
-	 *
-	 * turf.geomReduce(features, function (previousValue, currentGeometry, featureIndex, featureProperties, featureBBox, featureId) {
-	 *   //=previousValue
-	 *   //=currentGeometry
-	 *   //=featureIndex
-	 *   //=featureProperties
-	 *   //=featureBBox
-	 *   //=featureId
-	 *   return currentGeometry
-	 * });
-	 */
-	function geomReduce(geojson, callback, initialValue) {
-	    var previousValue = initialValue;
-	    geomEach(geojson, function (currentGeometry, featureIndex, featureProperties, featureBBox, featureId) {
-	        if (featureIndex === 0 && initialValue === undefined) { previousValue = currentGeometry; }
-	        else { previousValue = callback(previousValue, currentGeometry, featureIndex, featureProperties, featureBBox, featureId); }
-	    });
-	    return previousValue;
-	}
+	  oauth.bringPopupWindowToFront = function () {
+	    var brougtPopupToFront = false;
 
-	/**
-	 * Callback for flattenEach
-	 *
-	 * @callback flattenEachCallback
-	 * @param {Feature} currentFeature The current flattened feature being processed.
-	 * @param {number} featureIndex The current index of the Feature being processed.
-	 * @param {number} multiFeatureIndex The current index of the Multi-Feature being processed.
-	 */
+	    try {
+	      // This may cause a cross-origin error:
+	      // `DOMException: Blocked a frame with origin "..." from accessing a cross-origin frame.`
+	      if (oauth.popupWindow && !oauth.popupWindow.closed) {
+	        oauth.popupWindow.focus();
+	        brougtPopupToFront = true;
+	      }
+	    } catch (err) {// Bringing popup window to front failed (probably because of the cross-origin error mentioned above)
+	    }
 
-	/**
-	 * Iterate over flattened features in any GeoJSON object, similar to
-	 * Array.forEach.
-	 *
-	 * @name flattenEach
-	 * @param {FeatureCollection|Feature|Geometry} geojson any GeoJSON object
-	 * @param {Function} callback a method that takes (currentFeature, featureIndex, multiFeatureIndex)
-	 * @example
-	 * var features = turf.featureCollection([
-	 *     turf.point([26, 37], {foo: 'bar'}),
-	 *     turf.multiPoint([[40, 30], [36, 53]], {hello: 'world'})
-	 * ]);
-	 *
-	 * turf.flattenEach(features, function (currentFeature, featureIndex, multiFeatureIndex) {
-	 *   //=currentFeature
-	 *   //=featureIndex
-	 *   //=multiFeatureIndex
-	 * });
-	 */
-	function flattenEach(geojson, callback) {
-	    geomEach(geojson, function (geometry, featureIndex, properties, bbox, id) {
-	        // Callback for single geometry
-	        var type = (geometry === null) ? null : geometry.type;
-	        switch (type) {
-	        case null:
-	        case 'Point':
-	        case 'LineString':
-	        case 'Polygon':
-	            if (callback(feature$1(geometry, properties, {bbox: bbox, id: id}), featureIndex, 0) === false) { return false; }
-	            return;
-	        }
+	    return brougtPopupToFront;
+	  };
 
-	        var geomType;
+	  oauth.bootstrapToken = function (oauth_token, callback) {
+	    // ## Getting an request token
+	    // At this point we have an `oauth_token`, brought in from a function
+	    // call on a landing page popup.
+	    function get_access_token(oauth_token) {
+	      var url = o.url + '/oauth/access_token',
+	          params = timenonce(getAuth(o)),
+	          request_token_secret = token('oauth_request_token_secret');
+	      params.oauth_token = oauth_token;
+	      params.oauth_signature = ohauth.signature(o.oauth_secret, request_token_secret, ohauth.baseString('POST', url, params)); // ## Getting an access token
+	      // The final token required for authentication. At this point
+	      // we have a `request token secret`
 
-	        // Callback for multi-geometry
-	        switch (type) {
-	        case 'MultiPoint':
-	            geomType = 'Point';
-	            break;
-	        case 'MultiLineString':
-	            geomType = 'LineString';
-	            break;
-	        case 'MultiPolygon':
-	            geomType = 'Polygon';
-	            break;
-	        }
+	      ohauth.xhr('POST', url, params, null, {}, accessTokenDone);
+	      o.loading();
+	    }
 
-	        for (var multiFeatureIndex = 0; multiFeatureIndex < geometry.coordinates.length; multiFeatureIndex++) {
-	            var coordinate = geometry.coordinates[multiFeatureIndex];
-	            var geom = {
-	                type: geomType,
-	                coordinates: coordinate
-	            };
-	            if (callback(feature$1(geom, properties), featureIndex, multiFeatureIndex) === false) { return false; }
-	        }
-	    });
-	}
+	    function accessTokenDone(err, xhr) {
+	      o.done();
+	      if (err) return callback(err);
+	      var access_token = ohauth.stringQs(xhr.response);
+	      token('oauth_token', access_token.oauth_token);
+	      token('oauth_token_secret', access_token.oauth_token_secret);
+	      callback(null, oauth);
+	    }
 
-	/**
-	 * Takes one or more features and returns their area in square meters.
-	 *
-	 * @name area
-	 * @param {GeoJSON} geojson input GeoJSON feature(s)
-	 * @returns {number} area in square meters
-	 * @example
-	 * var polygon = turf.polygon([[[125, -15], [113, -22], [154, -27], [144, -15], [125, -15]]]);
-	 *
-	 * var area = turf.area(polygon);
-	 *
-	 * //addToMap
-	 * var addToMap = [polygon]
-	 * polygon.properties.area = area
-	 */
-	function area(geojson) {
-	    return geomReduce(geojson, function (value, geom) {
-	        return value + calculateArea(geom);
-	    }, 0);
-	}
+	    get_access_token(oauth_token);
+	  }; // # xhr
+	  //
+	  // A single XMLHttpRequest wrapper that does authenticated calls if the
+	  // user has logged in.
 
-	var RADIUS$1 = 6378137;
-	// var FLATTENING_DENOM = 298.257223563;
-	// var FLATTENING = 1 / FLATTENING_DENOM;
-	// var POLAR_RADIUS = RADIUS * (1 - FLATTENING);
 
-	/**
-	 * Calculate Area
-	 *
-	 * @private
-	 * @param {GeoJSON} geojson GeoJSON
-	 * @returns {number} area
-	 */
-	function calculateArea(geojson) {
-	    var area = 0, i;
-	    switch (geojson.type) {
-	    case 'Polygon':
-	        return polygonArea$1(geojson.coordinates);
-	    case 'MultiPolygon':
-	        for (i = 0; i < geojson.coordinates.length; i++) {
-	            area += polygonArea$1(geojson.coordinates[i]);
-	        }
-	        return area;
-	    case 'Point':
-	    case 'MultiPoint':
-	    case 'LineString':
-	    case 'MultiLineString':
-	        return 0;
-	    case 'GeometryCollection':
-	        for (i = 0; i < geojson.geometries.length; i++) {
-	            area += calculateArea(geojson.geometries[i]);
-	        }
-	        return area;
+	  oauth.xhr = function (options, callback) {
+	    if (!oauth.authenticated()) {
+	      if (o.auto) {
+	        return oauth.authenticate(run);
+	      } else {
+	        callback('not authenticated', null);
+	        return;
+	      }
+	    } else {
+	      return run();
 	    }
-	}
 
-	function polygonArea$1(coords) {
-	    var area = 0;
-	    if (coords && coords.length > 0) {
-	        area += Math.abs(ringArea$1(coords[0]));
-	        for (var i = 1; i < coords.length; i++) {
-	            area -= Math.abs(ringArea$1(coords[i]));
-	        }
-	    }
-	    return area;
-	}
+	    function run() {
+	      var params = timenonce(getAuth(o)),
+	          oauth_token_secret = token('oauth_token_secret'),
+	          url = options.prefix !== false ? o.url + options.path : options.path,
+	          url_parts = url.replace(/#.*$/, '').split('?', 2),
+	          base_url = url_parts[0],
+	          query = url_parts.length === 2 ? url_parts[1] : ''; // https://tools.ietf.org/html/rfc5849#section-3.4.1.3.1
 
-	/**
-	 * @private
-	 * Calculate the approximate area of the polygon were it projected onto the earth.
-	 * Note that this area will be positive if ring is oriented clockwise, otherwise it will be negative.
-	 *
-	 * Reference:
-	 * Robert. G. Chamberlain and William H. Duquette, "Some Algorithms for Polygons on a Sphere", JPL Publication 07-03, Jet Propulsion
-	 * Laboratory, Pasadena, CA, June 2007 http://trs-new.jpl.nasa.gov/dspace/handle/2014/40409
-	 *
-	 * @param {Array<Array<number>>} coords Ring Coordinates
-	 * @returns {number} The approximate signed geodesic area of the polygon in square meters.
-	 */
-	function ringArea$1(coords) {
-	    var p1;
-	    var p2;
-	    var p3;
-	    var lowerIndex;
-	    var middleIndex;
-	    var upperIndex;
-	    var i;
-	    var area = 0;
-	    var coordsLength = coords.length;
-
-	    if (coordsLength > 2) {
-	        for (i = 0; i < coordsLength; i++) {
-	            if (i === coordsLength - 2) { // i = N-2
-	                lowerIndex = coordsLength - 2;
-	                middleIndex = coordsLength - 1;
-	                upperIndex = 0;
-	            } else if (i === coordsLength - 1) { // i = N-1
-	                lowerIndex = coordsLength - 1;
-	                middleIndex = 0;
-	                upperIndex = 1;
-	            } else { // i = 0 to N-3
-	                lowerIndex = i;
-	                middleIndex = i + 1;
-	                upperIndex = i + 2;
-	            }
-	            p1 = coords[lowerIndex];
-	            p2 = coords[middleIndex];
-	            p3 = coords[upperIndex];
-	            area += (rad$1(p3[0]) - rad$1(p1[0])) * Math.sin(rad$1(p2[1]));
-	        }
+	      if ((!options.options || !options.options.header || options.options.header['Content-Type'] === 'application/x-www-form-urlencoded') && options.content) {
+	        params = xtend(params, ohauth.stringQs(options.content));
+	      }
 
-	        area = area * RADIUS$1 * RADIUS$1 / 2;
+	      params.oauth_token = token('oauth_token');
+	      params.oauth_signature = ohauth.signature(o.oauth_secret, oauth_token_secret, ohauth.baseString(options.method, base_url, xtend(params, ohauth.stringQs(query))));
+	      return ohauth.xhr(options.method, url, params, options.content, options.options, done);
 	    }
 
-	    return area;
-	}
+	    function done(err, xhr) {
+	      if (err) return callback(err);else if (xhr.responseXML) return callback(err, xhr.responseXML);else return callback(err, xhr.response);
+	    }
+	  }; // pre-authorize this object, if we can just get a token and token_secret
+	  // from the start
 
-	function rad$1(_) {
-	    return _ * Math.PI / 180;
-	}
 
-	/**
-	 * Get Geometry from Feature or Geometry Object
-	 *
-	 * @param {Feature|Geometry} geojson GeoJSON Feature or Geometry Object
-	 * @returns {Geometry|null} GeoJSON Geometry Object
-	 * @throws {Error} if geojson is not a Feature or Geometry Object
-	 * @example
-	 * var point = {
-	 *   "type": "Feature",
-	 *   "properties": {},
-	 *   "geometry": {
-	 *     "type": "Point",
-	 *     "coordinates": [110, 40]
-	 *   }
-	 * }
-	 * var geom = turf.getGeom(point)
-	 * //={"type": "Point", "coordinates": [110, 40]}
-	 */
-	function getGeom(geojson) {
-	    if (!geojson) { throw new Error('geojson is required'); }
-	    if (geojson.geometry !== undefined) { return geojson.geometry; }
-	    if (geojson.coordinates || geojson.geometries) { return geojson; }
-	    throw new Error('geojson must be a valid Feature or Geometry Object');
-	}
+	  oauth.preauth = function (c) {
+	    if (!c) return;
+	    if (c.oauth_token) token('oauth_token', c.oauth_token);
+	    if (c.oauth_token_secret) token('oauth_token_secret', c.oauth_token_secret);
+	    return oauth;
+	  };
 
-	/**
-	 * Finds the difference between two {@link Polygon|polygons} by clipping the second polygon from the first.
-	 *
-	 * @name difference
-	 * @param {Feature<Polygon|MultiPolygon>} polygon1 input Polygon feature
-	 * @param {Feature<Polygon|MultiPolygon>} polygon2 Polygon feature to difference from polygon1
-	 * @returns {Feature<Polygon|MultiPolygon>|null} a Polygon or MultiPolygon feature showing the area of `polygon1` excluding the area of `polygon2` (if empty returns `null`)
-	 * @example
-	 * var polygon1 = turf.polygon([[
-	 *   [128, -26],
-	 *   [141, -26],
-	 *   [141, -21],
-	 *   [128, -21],
-	 *   [128, -26]
-	 * ]], {
-	 *   "fill": "#F00",
-	 *   "fill-opacity": 0.1
-	 * });
-	 * var polygon2 = turf.polygon([[
-	 *   [126, -28],
-	 *   [140, -28],
-	 *   [140, -20],
-	 *   [126, -20],
-	 *   [126, -28]
-	 * ]], {
-	 *   "fill": "#00F",
-	 *   "fill-opacity": 0.1
-	 * });
-	 *
-	 * var difference = turf.difference(polygon1, polygon2);
-	 *
-	 * //addToMap
-	 * var addToMap = [polygon1, polygon2, difference];
-	 */
-	function difference(polygon1, polygon2) {
-	    var geom1 = getGeom(polygon1);
-	    var geom2 = getGeom(polygon2);
-	    var properties = polygon1.properties || {};
+	  oauth.options = function (_) {
+	    if (!arguments.length) return o;
+	    o = _;
+	    o.url = o.url || 'https://www.openstreetmap.org';
+	    o.landing = o.landing || 'land.html';
+	    o.singlepage = o.singlepage || false; // Optional loading and loading-done functions for nice UI feedback.
+	    // by default, no-ops
 
-	    // Issue #721 - JSTS can't handle empty polygons
-	    geom1 = removeEmptyPolygon(geom1);
-	    geom2 = removeEmptyPolygon(geom2);
-	    if (!geom1) { return null; }
-	    if (!geom2) { return feature$1(geom1, properties); }
+	    o.loading = o.loading || function () {};
 
-	    // JSTS difference operation
-	    var reader = new GeoJSONReader();
-	    var a = reader.read(geom1);
-	    var b = reader.read(geom2);
-	    var differenced = OverlayOp.difference(a, b);
-	    if (differenced.isEmpty()) { return null; }
-	    var writer = new GeoJSONWriter();
-	    var geom = writer.write(differenced);
+	    o.done = o.done || function () {};
 
-	    return feature$1(geom, properties);
-	}
+	    return oauth.preauth(o);
+	  }; // 'stamp' an authentication object from `getAuth()`
+	  // with a [nonce](http://en.wikipedia.org/wiki/Cryptographic_nonce)
+	  // and timestamp
 
-	/**
-	 * Detect Empty Polygon
-	 *
-	 * @private
-	 * @param {Geometry<Polygon|MultiPolygon>} geom Geometry Object
-	 * @returns {Geometry<Polygon|MultiPolygon>|null} removed any polygons with no areas
-	 */
-	function removeEmptyPolygon(geom) {
-	    switch (geom.type) {
-	    case 'Polygon':
-	        if (area(geom) > 1) { return geom; }
-	        return null;
-	    case 'MultiPolygon':
-	        var coordinates = [];
-	        flattenEach(geom, function (feature$$1) {
-	            if (area(feature$$1) > 1) { coordinates.push(feature$$1.geometry.coordinates); }
-	        });
-	        if (coordinates.length) { return {type: 'MultiPolygon', coordinates: coordinates}; }
-	    }
-	}
 
-	/**
-	 * Takes two or more {@link Polygon|polygons} and returns a combined polygon. If the input polygons are not contiguous, this function returns a {@link MultiPolygon} feature.
-	 *
-	 * @name union
-	 * @param {...Feature<Polygon>} A polygon to combine
-	 * @returns {Feature<(Polygon|MultiPolygon)>} a combined {@link Polygon} or {@link MultiPolygon} feature
-	 * @example
-	 * var poly1 = turf.polygon([[
-	 *     [-82.574787, 35.594087],
-	 *     [-82.574787, 35.615581],
-	 *     [-82.545261, 35.615581],
-	 *     [-82.545261, 35.594087],
-	 *     [-82.574787, 35.594087]
-	 * ]], {"fill": "#0f0"});
-	 * var poly2 = turf.polygon([[
-	 *     [-82.560024, 35.585153],
-	 *     [-82.560024, 35.602602],
-	 *     [-82.52964, 35.602602],
-	 *     [-82.52964, 35.585153],
-	 *     [-82.560024, 35.585153]
-	 * ]], {"fill": "#00f"});
-	 *
-	 * var union = turf.union(poly1, poly2);
-	 *
-	 * //addToMap
-	 * var addToMap = [poly1, poly2, union];
-	 */
-	function union$1() {
-	    var arguments$1 = arguments;
+	  function timenonce(o) {
+	    o.oauth_timestamp = ohauth.timestamp();
+	    o.oauth_nonce = ohauth.nonce();
+	    return o;
+	  } // get/set tokens. These are prefixed with the base URL so that `osm-auth`
+	  // can be used with multiple APIs and the keys in `localStorage`
+	  // will not clash
 
-	    var reader = new GeoJSONReader();
-	    var result = reader.read(JSON.stringify(arguments[0].geometry));
 
-	    for (var i = 1; i < arguments.length; i++) {
-	        result = UnionOp.union(result, reader.read(JSON.stringify(arguments$1[i].geometry)));
-	    }
+	  var token;
 
-	    var writer = new GeoJSONWriter();
-	    result = writer.write(result);
+	  if (store.enabled) {
+	    token = function token(x, y) {
+	      if (arguments.length === 1) return store.get(o.url + x);else if (arguments.length === 2) return store.set(o.url + x, y);
+	    };
+	  } else {
+	    var storage = {};
 
-	    return {
-	        type: 'Feature',
-	        geometry: result,
-	        properties: arguments[0].properties
+	    token = function token(x, y) {
+	      if (arguments.length === 1) return storage[o.url + x];else if (arguments.length === 2) return storage[o.url + x] = y;
 	    };
-	}
+	  } // Get an authentication object. If you just add and remove properties
+	  // from a single object, you'll need to use `delete` to make sure that
+	  // it doesn't contain undesired properties for authentication
 
-	// Reduce an array of locations into a single GeoJSON feature
-	function _locationReducer(accumulator, location) {
-	  /* eslint-disable no-console, no-invalid-this */
-	  var result;
-	  try {
-	    var resolved = this.resolveLocation(location);
-	    if (!resolved || !resolved.feature) {
-	      console.warn(("Warning:  Couldn't resolve location \"" + location + "\""));
-	      return accumulator;
-	    }
-	    result = !accumulator ? resolved.feature : union$1(accumulator, resolved.feature);
-	  } catch (e) {
-	    console.warn(("Warning:  Error resolving location \"" + location + "\""));
-	    console.warn(e);
-	    result = accumulator;
-	  }
 
-	  return result;
-	  /* eslint-enable no-console, no-invalid-this */
-	}
+	  function getAuth(o) {
+	    return {
+	      oauth_consumer_key: o.oauth_consumer_key,
+	      oauth_signature_method: 'HMAC-SHA1'
+	    };
+	  } // potentially pre-authorize
 
 
+	  oauth.options(o);
+	  return oauth;
+	};
 
-	function _cloneDeep(obj) {
-	  return JSON.parse(JSON.stringify(obj));
-	}
+	var tiler$2 = utilTiler();
+	var dispatch$2 = dispatch$8('apiStatusChange', 'authLoading', 'authDone', 'change', 'loading', 'loaded', 'loadedNotes');
+	var urlroot = 'https://www.openstreetmap.org';
+	var oauth = osmAuth({
+	  url: urlroot,
+	  oauth_consumer_key: '5A043yRSEugj4DJ5TljuapfnrflWDte8jTOcWLlT',
+	  oauth_secret: 'aB3jKq1TRsCOUrfOIZ6oQMEDmv2ptV76PA54NGLL',
+	  loading: authLoading,
+	  done: authDone
+	}); // hardcode default block of Google Maps
 
+	var _imageryBlocklists = [/.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/];
+	var _tileCache = {
+	  toLoad: {},
+	  loaded: {},
+	  inflight: {},
+	  seen: {},
+	  rtree: new RBush()
+	};
+	var _noteCache = {
+	  toLoad: {},
+	  loaded: {},
+	  inflight: {},
+	  inflightPost: {},
+	  note: {},
+	  closed: {},
+	  rtree: new RBush()
+	};
+	var _userCache = {
+	  toLoad: {},
+	  user: {}
+	};
 
-	var defaultExport = function defaultExport(fc) {
-	  var this$1 = this;
+	var _cachedApiStatus;
 
-	  this._cache = {};
+	var _changeset = {};
 
-	  // process input FeatureCollection
-	  if (fc && fc.type === 'FeatureCollection' && Array.isArray(fc.features)) {
-	    fc.features.forEach(function (feature) {
-	      feature.properties = feature.properties || {};
-	      var props = feature.properties;
+	var _deferred = new Set();
 
-	      // get `id` from either `id` or `properties`
-	      var id = feature.id || props.id;
-	      if (!id || !/^\S+\.geojson$/i.test(id)) { return; }
+	var _connectionID = 1;
+	var _tileZoom = 16;
+	var _noteZoom = 12;
 
-	      // ensure id exists and is lowercase
-	      id = id.toLowerCase();
-	      feature.id = id;
-	      props.id = id;
+	var _rateLimitError;
 
-	      // ensure area property exists
-	      if (!props.area) {
-	        var area = geojsonArea.geometry(feature.geometry) / 1e6;// m² to km²
-	        props.area = Number(area.toFixed(2));
-	      }
+	var _userChangesets;
 
-	      this$1._cache[id] = feature;
-	    });
-	  }
+	var _userDetails;
 
-	  // Replace CountryCoder world geometry to have a polygon covering the world.
-	  var world = _cloneDeep(feature('Q2'));
-	  world.geometry = {
-	    type: 'Polygon',
-	    coordinates: [[[-180, -90], [180, -90], [180, 90], [-180, 90], [-180, -90]]]
-	  };
-	  world.id = 'Q2';
-	  world.properties.id = 'Q2';
-	  world.properties.area = geojsonArea.geometry(world.geometry) / 1e6;// m² to km²
-	  this._cache.Q2 = world;
-	};
+	var _off; // set a default but also load this from the API status
 
 
-	// validateLocation
-	//
-	// Pass a `location` identifier
-	// Returns a result like
-	// {
-	//   type:   'point', 'geojson', or 'countrycoder'
-	//   location:the queried location
-	//   id:      a unique identifier
-	// }
-	//or `null` if the location is invalid
-	//
-	defaultExport.prototype.validateLocation = function validateLocation (location) {
-	  if (Array.isArray(location)) { // a [lon,lat] coordinate pair?
-	    if (location.length === 2 && Number.isFinite(location[0]) && Number.isFinite(location[1]) &&
-	      location[0] >= -180 && location[0] <= 180 && location[1] >= -90 && location[1] <= 90
-	    ) {
-	      var id = '[' + location.toString() + ']';
-	      return { type: 'point', location: location, id: id };
-	    }
+	var _maxWayNodes = 2000;
 
-	  } else if (typeof location === 'string' && /^\S+\.geojson$/i.test(location)) { // a .geojson filename?
-	    var id$1 = location.toLowerCase();
-	    if (this._cache[id$1]) {
-	      return { type: 'geojson', location: location, id: id$1 };
-	    }
+	function authLoading() {
+	  dispatch$2.call('authLoading');
+	}
 
-	  } else if (typeof location === 'string' || typeof location === 'number') { // a country-coder value?
-	    var feature$1 = feature(location);
-	    if (feature$1) {
-	      // Use wikidata QID as the identifier, since that seems to be the only
-	      // property that everything in CountryCoder is guaranteed to have.
-	      var id$2 = feature$1.properties.wikidata;
-	      return { type: 'countrycoder', location: location, id: id$2 };
-	    }
+	function authDone() {
+	  dispatch$2.call('authDone');
+	}
+
+	function abortRequest$2(controllerOrXHR) {
+	  if (controllerOrXHR) {
+	    controllerOrXHR.abort();
 	  }
+	}
 
-	  return null;
-	};
+	function hasInflightRequests(cache) {
+	  return Object.keys(cache.inflight).length;
+	}
 
+	function abortUnwantedRequests(cache, visibleTiles) {
+	  Object.keys(cache.inflight).forEach(function (k) {
+	    if (cache.toLoad[k]) return;
+	    if (visibleTiles.find(function (tile) {
+	      return k === tile.id;
+	    })) return;
+	    abortRequest$2(cache.inflight[k]);
+	    delete cache.inflight[k];
+	  });
+	}
 
-	// resolveLocation
-	//
-	// Pass a `location` identifier
-	// Returns a result like
-	// {
-	//   type:    'point', 'geojson', or 'countrycoder'
-	//   location:the queried location
-	//   id:      a unique identifier
-	//   feature: the geojson feature
-	// }
-	//or `null` if the location is invalid
-	//
-	defaultExport.prototype.resolveLocation = function resolveLocation (location) {
-	  var valid = this.validateLocation(location);
-	  if (!valid) { return null; }
-
-	  // return a result from cache if we can
-	  if (this._cache[valid.id]) {
-	    return Object.assign(valid, { feature: this._cache[valid.id] });
-	  }
-
-	  // a [lon,lat] coordinate pair?
-	  if (valid.type === 'point') {
-	    var RADIUS = 25000;// meters
-	    var EDGES = 10;
-	    var PRECISION = 3;
-	    var area = Math.PI * RADIUS * RADIUS / 1e6;   // m² to km²
-	    var feature$1 = this._cache[valid.id] = geojsonPrecision({
-	      type: 'Feature',
-	      id: valid.id,
-	      properties: { id: valid.id, area: Number(area.toFixed(2)) },
-	      geometry: circleToPolygon(location, RADIUS, EDGES)
-	    }, PRECISION);
-	    return Object.assign(valid, { feature: feature$1 });
-
-	  // a .geojson filename?
-	  } else if (valid.type === 'geojson') ; else if (valid.type === 'countrycoder') {
-	    var feature$1$1 = _cloneDeep(feature(valid.id));
-	    var props = feature$1$1.properties;
-
-	    // -> This block of code is weird and requires some explanation. <-
-	    // CountryCoder includes higher level features which are made up of members.
-	    // These features don't have their own geometry, but CountryCoder provides an
-	    // `aggregateFeature` method to combine these members into a MultiPolygon.
-	    // BUT, when we try to actually work with these aggregated MultiPolygons,
-	    // Turf/JSTS gets crashy because of topography bugs.
-	    // SO, we'll aggregate the features ourselves by unioning them together.
-	    // This approach also has the benefit of removing all the internal boaders and
-	    // simplifying the regional polygons a lot.
-	    if (Array.isArray(props.members)) {
-	      var seed = feature$1$1.geometry ? feature$1$1 : null;
-	      var aggregate = props.members.reduce(_locationReducer.bind(this), seed);
-	      feature$1$1.geometry = aggregate.geometry;
-	    }
-
-	    // ensure area property exists
-	    if (!props.area) {
-	      var area$1 = geojsonArea.geometry(feature$1$1.geometry) / 1e6;// m² to km²
-	      props.area = Number(area$1.toFixed(2));
-	    }
-
-	    // ensure id property exists
-	    feature$1$1.id = valid.id;
-	    props.id = valid.id;
-
-	    this._cache[valid.id] = feature$1$1;
-	    return Object.assign(valid, { feature: feature$1$1 });
-	  }
+	function getLoc(attrs) {
+	  var lon = attrs.lon && attrs.lon.value;
+	  var lat = attrs.lat && attrs.lat.value;
+	  return [parseFloat(lon), parseFloat(lat)];
+	}
 
-	  return null;
-	};
+	function getNodes(obj) {
+	  var elems = obj.getElementsByTagName('nd');
+	  var nodes = new Array(elems.length);
 
+	  for (var i = 0, l = elems.length; i < l; i++) {
+	    nodes[i] = 'n' + elems[i].attributes.ref.value;
+	  }
 
-	// resolveLocationSet
-	//
-	// Pass a `locationSet` Object like:
-	// `{ include: [ Array ], exclude: [ Array ] }`
-	// Returns a stable identifier string of the form:
-	// "+[included]-[excluded]"
-	//
-	defaultExport.prototype.resolveLocationSet = function resolveLocationSet (locationSet) {
-	  locationSet = locationSet || {};
-	  var resolve = this.resolveLocation.bind(this);
-	  var include = (locationSet.include || []).map(resolve).filter(Boolean);
-	  var exclude = (locationSet.exclude || []).map(resolve).filter(Boolean);
+	  return nodes;
+	}
 
-	  if (!include.length) {
-	    include = [resolve('Q2')]; // default to 'the world'
-	  }
+	function getNodesJSON(obj) {
+	  var elems = obj.nodes;
+	  var nodes = new Array(elems.length);
 
-	  // return quickly if it's a single included location..
-	  if (include.length === 1 && exclude.length === 0) {
-	    return include[0].feature;
+	  for (var i = 0, l = elems.length; i < l; i++) {
+	    nodes[i] = 'n' + elems[i];
 	  }
 
-	  // generate stable identifier
-	  include.sort(sortFeatures);
-	  var id = '+[' + include.map(function (d) { return d.id; }).join(',') + ']';
-	  if (exclude.length) {
-	    exclude.sort(sortFeatures);
-	    id += '-[' + exclude.map(function (d) { return d.id; }).join(',') + ']';
-	  }
+	  return nodes;
+	}
+
+	function getTags(obj) {
+	  var elems = obj.getElementsByTagName('tag');
+	  var tags = {};
 
-	  // return cached?
-	  if (this._cache[id]) {
-	    return this._cache[id];
+	  for (var i = 0, l = elems.length; i < l; i++) {
+	    var attrs = elems[i].attributes;
+	    tags[attrs.k.value] = attrs.v.value;
 	  }
 
-	  // calculate unions
-	  var includeGeoJSON = include.map(function (d) { return d.location; }).reduce(_locationReducer.bind(this), null);
-	  var excludeGeoJSON = exclude.map(function (d) { return d.location; }).reduce(_locationReducer.bind(this), null);
+	  return tags;
+	}
 
-	  // calculate difference, update area and return result
-	  var resultGeoJSON = excludeGeoJSON ? difference(includeGeoJSON, excludeGeoJSON) : includeGeoJSON;
-	  var area = geojsonArea.geometry(resultGeoJSON.geometry) / 1e6;// m² to km²
-	  resultGeoJSON.id = id;
-	  resultGeoJSON.properties = { id: id, area: Number(area.toFixed(2)) };
+	function getMembers(obj) {
+	  var elems = obj.getElementsByTagName('member');
+	  var members = new Array(elems.length);
 
-	  return this._cache[id] = resultGeoJSON;
+	  for (var i = 0, l = elems.length; i < l; i++) {
+	    var attrs = elems[i].attributes;
+	    members[i] = {
+	      id: attrs.type.value[0] + attrs.ref.value,
+	      type: attrs.type.value,
+	      role: attrs.role.value
+	    };
+	  }
 
+	  return members;
+	}
 
-	  // Sorting the location lists is ok because they end up unioned together.
-	  // This sorting makes it possible to generate a deterministic id.
-	  function sortFeatures(a, b) {
-	    var rank = { countrycoder: 1, geojson: 2, point: 3 };
-	    var aRank = rank[a.type];
-	    var bRank = rank[b.type];
+	function getMembersJSON(obj) {
+	  var elems = obj.members;
+	  var members = new Array(elems.length);
 
-	    return (aRank > bRank) ? 1
-	      : (aRank < bRank) ? -1
-	      : a.id.localeCompare(b.id);
+	  for (var i = 0, l = elems.length; i < l; i++) {
+	    var attrs = elems[i];
+	    members[i] = {
+	      id: attrs.type[0] + attrs.ref,
+	      type: attrs.type,
+	      role: attrs.role
+	    };
 	  }
-	};
 
+	  return members;
+	}
 
-	defaultExport.prototype.cache = function cache () {
-	  return this._cache;
-	};
+	function getVisible(attrs) {
+	  return !attrs.visible || attrs.visible.value !== 'false';
+	}
 
-	var _oci = null;
+	function parseComments(comments) {
+	  var parsedComments = []; // for each comment
 
-	function uiSuccess(context) {
-	  var MAXEVENTS = 2;
-	  var dispatch$1 = dispatch('cancel');
-	  var _changeset;
-	  var _location;
-	  ensureOSMCommunityIndex();   // start fetching the data
+	  for (var i = 0; i < comments.length; i++) {
+	    var comment = comments[i];
 
+	    if (comment.nodeName === 'comment') {
+	      var childNodes = comment.childNodes;
+	      var parsedComment = {};
 
-	  function ensureOSMCommunityIndex() {
-	    var data = _mainFileFetcher;
-	    return Promise.all([ data.get('oci_resources'), data.get('oci_features') ])
-	      .then(function (vals) {
-	        if (_oci) { return _oci; }
-
-	        var ociResources = vals[0].resources;
-	        var loco = new defaultExport(vals[1]);
-	        var ociFeatures = {};
-
-	        Object.values(ociResources).forEach(function (resource) {
-	          var feature = loco.resolveLocationSet(resource.locationSet);
-	          var ociFeature = ociFeatures[feature.id];
-	          if (!ociFeature) {
-	            ociFeature = JSON.parse(JSON.stringify(feature));  // deep clone
-	            ociFeature.properties.resourceIDs = new Set();
-	            ociFeatures[feature.id] = ociFeature;
+	      for (var j = 0; j < childNodes.length; j++) {
+	        var node = childNodes[j];
+	        var nodeName = node.nodeName;
+	        if (nodeName === '#text') continue;
+	        parsedComment[nodeName] = node.textContent;
+
+	        if (nodeName === 'uid') {
+	          var uid = node.textContent;
+
+	          if (uid && !_userCache.user[uid]) {
+	            _userCache.toLoad[uid] = true;
 	          }
-	          ociFeature.properties.resourceIDs.add(resource.id);
-	        });
+	        }
+	      }
 
-	        return _oci = {
-	          features: ociFeatures,
-	          resources: ociResources,
-	          query: whichPolygon_1({ type: 'FeatureCollection', features: Object.values(ociFeatures) })
-	        };
-	      });
+	      if (parsedComment) {
+	        parsedComments.push(parsedComment);
+	      }
+	    }
 	  }
 
+	  return parsedComments;
+	}
 
-	  // string-to-date parsing in JavaScript is weird
-	  function parseEventDate(when) {
-	    if (!when) { return; }
-
-	    var raw = when.trim();
-	    if (!raw) { return; }
+	function encodeNoteRtree(note) {
+	  return {
+	    minX: note.loc[0],
+	    minY: note.loc[1],
+	    maxX: note.loc[0],
+	    maxY: note.loc[1],
+	    data: note
+	  };
+	}
 
-	    if (!/Z$/.test(raw)) {   // if no trailing 'Z', add one
-	      raw += 'Z';            // this forces date to be parsed as a UTC date
-	    }
+	var jsonparsers = {
+	  node: function nodeData(obj, uid) {
+	    return new osmNode({
+	      id: uid,
+	      visible: typeof obj.visible === 'boolean' ? obj.visible : true,
+	      version: obj.version && obj.version.toString(),
+	      changeset: obj.changeset && obj.changeset.toString(),
+	      timestamp: obj.timestamp,
+	      user: obj.user,
+	      uid: obj.uid && obj.uid.toString(),
+	      loc: [parseFloat(obj.lon), parseFloat(obj.lat)],
+	      tags: obj.tags
+	    });
+	  },
+	  way: function wayData(obj, uid) {
+	    return new osmWay({
+	      id: uid,
+	      visible: typeof obj.visible === 'boolean' ? obj.visible : true,
+	      version: obj.version && obj.version.toString(),
+	      changeset: obj.changeset && obj.changeset.toString(),
+	      timestamp: obj.timestamp,
+	      user: obj.user,
+	      uid: obj.uid && obj.uid.toString(),
+	      tags: obj.tags,
+	      nodes: getNodesJSON(obj)
+	    });
+	  },
+	  relation: function relationData(obj, uid) {
+	    return new osmRelation({
+	      id: uid,
+	      visible: typeof obj.visible === 'boolean' ? obj.visible : true,
+	      version: obj.version && obj.version.toString(),
+	      changeset: obj.changeset && obj.changeset.toString(),
+	      timestamp: obj.timestamp,
+	      user: obj.user,
+	      uid: obj.uid && obj.uid.toString(),
+	      tags: obj.tags,
+	      members: getMembersJSON(obj)
+	    });
+	  },
+	  user: function parseUser(obj, uid) {
+	    return {
+	      id: uid,
+	      display_name: obj.display_name,
+	      account_created: obj.account_created,
+	      image_url: obj.img && obj.img.href,
+	      changesets_count: obj.changesets && obj.changesets.count && obj.changesets.count.toString() || '0',
+	      active_blocks: obj.blocks && obj.blocks.received && obj.blocks.received.active && obj.blocks.received.active.toString() || '0'
+	    };
+	  }
+	};
 
-	    var parsed = new Date(raw);
-	    return new Date(parsed.toUTCString().substr(0, 25));  // convert to local timezone
+	function parseJSON(payload, callback, options) {
+	  options = Object.assign({
+	    skipSeen: true
+	  }, options);
+
+	  if (!payload) {
+	    return callback({
+	      message: 'No JSON',
+	      status: -1
+	    });
 	  }
 
+	  var json = payload;
+	  if (_typeof(json) !== 'object') json = JSON.parse(payload);
+	  if (!json.elements) return callback({
+	    message: 'No JSON',
+	    status: -1
+	  });
+	  var children = json.elements;
+	  var handle = window.requestIdleCallback(function () {
+	    _deferred["delete"](handle);
 
-	  function success(selection) {
-	    var header = selection
-	      .append('div')
-	      .attr('class', 'header fillL');
-
-	    header
-	      .append('h3')
-	      .text(_t('success.just_edited'));
-
-	    header
-	      .append('button')
-	      .attr('class', 'close')
-	      .on('click', function () { return dispatch$1.call('cancel'); })
-	      .call(svgIcon('#iD-icon-close'));
-
-	    var body = selection
-	      .append('div')
-	      .attr('class', 'body save-success fillL');
-
-	    var summary = body
-	      .append('div')
-	      .attr('class', 'save-summary');
-
-	    summary
-	      .append('h3')
-	      .text(_t('success.thank_you' + (_location ? '_location' : ''), { where: _location }));
-
-	    summary
-	      .append('p')
-	      .text(_t('success.help_html'))
-	      .append('a')
-	      .attr('class', 'link-out')
-	      .attr('target', '_blank')
-	      .attr('tabindex', -1)
-	      .attr('href', _t('success.help_link_url'))
-	      .call(svgIcon('#iD-icon-out-link', 'inline'))
-	      .append('span')
-	      .text(_t('success.help_link_text'));
+	    var results = [];
+	    var result;
 
-	    var osm = context.connection();
-	    if (!osm) { return; }
+	    for (var i = 0; i < children.length; i++) {
+	      result = parseChild(children[i]);
+	      if (result) results.push(result);
+	    }
 
-	    var changesetURL = osm.changesetURL(_changeset.id);
+	    callback(null, results);
+	  });
 
-	    var table = summary
-	      .append('table')
-	      .attr('class', 'summary-table');
-
-	    var row = table
-	      .append('tr')
-	      .attr('class', 'summary-row');
-
-	    row
-	      .append('td')
-	      .attr('class', 'cell-icon summary-icon')
-	      .append('a')
-	      .attr('target', '_blank')
-	      .attr('href', changesetURL)
-	      .append('svg')
-	      .attr('class', 'logo-small')
-	      .append('use')
-	      .attr('xlink:href', '#iD-logo-osm');
-
-	    var summaryDetail = row
-	      .append('td')
-	      .attr('class', 'cell-detail summary-detail');
-
-	    summaryDetail
-	      .append('a')
-	      .attr('class', 'cell-detail summary-view-on-osm')
-	      .attr('target', '_blank')
-	      .attr('href', changesetURL)
-	      .text(_t('success.view_on_osm'));
-
-	    summaryDetail
-	      .append('div')
-	      .html(_t('success.changeset_id', {
-	        changeset_id: ("<a href=\"" + changesetURL + "\" target=\"_blank\">" + (_changeset.id) + "</a>")
-	      }));
+	  _deferred.add(handle);
 
+	  function parseChild(child) {
+	    var parser = jsonparsers[child.type];
+	    if (!parser) return null;
+	    var uid;
+	    uid = osmEntity.id.fromOSM(child.type, child.id);
 
-	    // Get OSM community index features intersecting the map..
-	    ensureOSMCommunityIndex()
-	      .then(function (oci) {
-	        var communities = [];
-	        var properties = oci.query(context.map().center(), true) || [];
-
-	        // Gather the communities from the result
-	        properties.forEach(function (props) {
-	          var resourceIDs = Array.from(props.resourceIDs);
-	          resourceIDs.forEach(function (resourceID) {
-	            var resource = oci.resources[resourceID];
-	            communities.push({
-	              area: props.area || Infinity,
-	              order: resource.order || 0,
-	              resource: resource
-	            });
-	          });
-	        });
+	    if (options.skipSeen) {
+	      if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity
 
-	        // sort communities by feature area ascending, community order descending
-	        communities.sort(function (a, b) { return a.area - b.area || b.order - a.order; });
+	      _tileCache.seen[uid] = true;
+	    }
 
-	        body
-	          .call(showCommunityLinks, communities.map(function (c) { return c.resource; }));
-	      });
+	    return parser(child, uid);
 	  }
+	}
 
+	function parseUserJSON(payload, callback, options) {
+	  options = Object.assign({
+	    skipSeen: true
+	  }, options);
 
-	  function showCommunityLinks(selection, resources) {
-	    var communityLinks = selection
-	      .append('div')
-	      .attr('class', 'save-communityLinks');
-
-	    communityLinks
-	      .append('h3')
-	      .text(_t('success.like_osm'));
-
-	    var table = communityLinks
-	      .append('table')
-	      .attr('class', 'community-table');
-
-	    var row = table.selectAll('.community-row')
-	      .data(resources);
-
-	    var rowEnter = row.enter()
-	      .append('tr')
-	      .attr('class', 'community-row');
-
-	    rowEnter
-	      .append('td')
-	      .attr('class', 'cell-icon community-icon')
-	      .append('a')
-	      .attr('target', '_blank')
-	      .attr('href', function (d) { return d.url; })
-	      .append('svg')
-	      .attr('class', 'logo-small')
-	      .append('use')
-	      .attr('xlink:href', function (d) { return ("#community-" + (d.type)); });
-
-	    var communityDetail = rowEnter
-	      .append('td')
-	      .attr('class', 'cell-detail community-detail');
-
-	    communityDetail
-	      .each(showCommunityDetails);
-
-	    communityLinks
-	      .append('div')
-	      .attr('class', 'community-missing')
-	      .text(_t('success.missing'))
-	      .append('a')
-	      .attr('class', 'link-out')
-	      .attr('target', '_blank')
-	      .attr('tabindex', -1)
-	      .call(svgIcon('#iD-icon-out-link', 'inline'))
-	      .attr('href', 'https://github.com/osmlab/osm-community-index/issues')
-	      .append('span')
-	      .text(_t('success.tell_us'));
+	  if (!payload) {
+	    return callback({
+	      message: 'No JSON',
+	      status: -1
+	    });
 	  }
 
+	  var json = payload;
+	  if (_typeof(json) !== 'object') json = JSON.parse(payload);
+	  if (!json.users && !json.user) return callback({
+	    message: 'No JSON',
+	    status: -1
+	  });
+	  var objs = json.users || [json];
+	  var handle = window.requestIdleCallback(function () {
+	    _deferred["delete"](handle);
 
-	  function showCommunityDetails(d) {
-	    var selection = select(this);
-	    var communityID = d.id;
-	    var replacements = {
-	      url: linkify(d.url),
-	      signupUrl: linkify(d.signupUrl || d.url)
-	    };
+	    var results = [];
+	    var result;
 
-	    selection
-	      .append('div')
-	      .attr('class', 'community-name')
-	      .append('a')
-	      .attr('target', '_blank')
-	      .attr('href', d.url)
-	      .text(_t(("community." + (d.id) + ".name")));
-
-	    var descriptionHTML = _t(("community." + (d.id) + ".description"), replacements);
-
-	    if (d.type === 'reddit') {   // linkify subreddits  #4997
-	      descriptionHTML = descriptionHTML
-	        .replace(/(\/r\/\w*\/*)/i, function (match) { return linkify(d.url, match); });
-	    }
-
-	    selection
-	      .append('div')
-	      .attr('class', 'community-description')
-	      .html(descriptionHTML);
-
-	    if (d.extendedDescription || (d.languageCodes && d.languageCodes.length)) {
-	      selection
-	        .append('div')
-	        .call(uiDisclosure(context, ("community-more-" + (d.id)), false)
-	          .expanded(false)
-	          .updatePreference(false)
-	          .title(_t('success.more'))
-	          .content(showMore)
-	        );
+	    for (var i = 0; i < objs.length; i++) {
+	      result = parseObj(objs[i]);
+	      if (result) results.push(result);
 	    }
 
-	    var nextEvents = (d.events || [])
-	      .map(function (event) {
-	        event.date = parseEventDate(event.when);
-	        return event;
-	      })
-	      .filter(function (event) {      // date is valid and future (or today)
-	        var t = event.date.getTime();
-	        var now = (new Date()).setHours(0,0,0,0);
-	        return !isNaN(t) && t >= now;
-	      })
-	      .sort(function (a, b) {       // sort by date ascending
-	        return a.date < b.date ? -1 : a.date > b.date ? 1 : 0;
-	      })
-	      .slice(0, MAXEVENTS);   // limit number of events shown
+	    callback(null, results);
+	  });
 
-	    if (nextEvents.length) {
-	      selection
-	        .append('div')
-	        .call(uiDisclosure(context, ("community-events-" + (d.id)), false)
-	          .expanded(false)
-	          .updatePreference(false)
-	          .title(_t('success.events'))
-	          .content(showNextEvents)
-	        )
-	        .select('.hide-toggle')
-	        .append('span')
-	        .attr('class', 'badge-text')
-	        .text(nextEvents.length);
+	  _deferred.add(handle);
+
+	  function parseObj(obj) {
+	    var uid = obj.user.id && obj.user.id.toString();
+
+	    if (options.skipSeen && _userCache.user[uid]) {
+	      delete _userCache.toLoad[uid];
+	      return null;
 	    }
 
+	    var user = jsonparsers.user(obj.user, uid);
+	    _userCache.user[uid] = user;
+	    delete _userCache.toLoad[uid];
+	    return user;
+	  }
+	}
 
-	    function showMore(selection) {
-	      var more = selection.selectAll('.community-more')
-	        .data([0]);
+	var parsers = {
+	  node: function nodeData(obj, uid) {
+	    var attrs = obj.attributes;
+	    return new osmNode({
+	      id: uid,
+	      visible: getVisible(attrs),
+	      version: attrs.version.value,
+	      changeset: attrs.changeset && attrs.changeset.value,
+	      timestamp: attrs.timestamp && attrs.timestamp.value,
+	      user: attrs.user && attrs.user.value,
+	      uid: attrs.uid && attrs.uid.value,
+	      loc: getLoc(attrs),
+	      tags: getTags(obj)
+	    });
+	  },
+	  way: function wayData(obj, uid) {
+	    var attrs = obj.attributes;
+	    return new osmWay({
+	      id: uid,
+	      visible: getVisible(attrs),
+	      version: attrs.version.value,
+	      changeset: attrs.changeset && attrs.changeset.value,
+	      timestamp: attrs.timestamp && attrs.timestamp.value,
+	      user: attrs.user && attrs.user.value,
+	      uid: attrs.uid && attrs.uid.value,
+	      tags: getTags(obj),
+	      nodes: getNodes(obj)
+	    });
+	  },
+	  relation: function relationData(obj, uid) {
+	    var attrs = obj.attributes;
+	    return new osmRelation({
+	      id: uid,
+	      visible: getVisible(attrs),
+	      version: attrs.version.value,
+	      changeset: attrs.changeset && attrs.changeset.value,
+	      timestamp: attrs.timestamp && attrs.timestamp.value,
+	      user: attrs.user && attrs.user.value,
+	      uid: attrs.uid && attrs.uid.value,
+	      tags: getTags(obj),
+	      members: getMembers(obj)
+	    });
+	  },
+	  note: function parseNote(obj, uid) {
+	    var attrs = obj.attributes;
+	    var childNodes = obj.childNodes;
+	    var props = {};
+	    props.id = uid;
+	    props.loc = getLoc(attrs); // if notes are coincident, move them apart slightly
 
-	      var moreEnter = more.enter()
-	        .append('div')
-	        .attr('class', 'community-more');
+	    var coincident = false;
+	    var epsilon = 0.00001;
 
-	      if (d.extendedDescription) {
-	        moreEnter
-	          .append('div')
-	          .attr('class', 'community-extended-description')
-	          .html(_t(("community." + (d.id) + ".extendedDescription"), replacements));
+	    do {
+	      if (coincident) {
+	        props.loc = geoVecAdd(props.loc, [epsilon, epsilon]);
 	      }
 
-	      if (d.languageCodes && d.languageCodes.length) {
-	        var languageList = d.languageCodes
-	          .map(function (code) { return _mainLocalizer.languageName(code); })
-	          .join(', ');
+	      var bbox = geoExtent(props.loc).bbox();
+	      coincident = _noteCache.rtree.search(bbox).length;
+	    } while (coincident); // parse note contents
+
 
-	        moreEnter
-	          .append('div')
-	          .attr('class', 'community-languages')
-	          .text(_t('success.languages', { languages: languageList }));
+	    for (var i = 0; i < childNodes.length; i++) {
+	      var node = childNodes[i];
+	      var nodeName = node.nodeName;
+	      if (nodeName === '#text') continue; // if the element is comments, parse the comments
+
+	      if (nodeName === 'comments') {
+	        props[nodeName] = parseComments(node.childNodes);
+	      } else {
+	        props[nodeName] = node.textContent;
 	      }
 	    }
 
+	    var note = new osmNote(props);
+	    var item = encodeNoteRtree(note);
+	    _noteCache.note[note.id] = note;
 
-	    function showNextEvents(selection) {
-	      var events = selection
-	        .append('div')
-	        .attr('class', 'community-events');
+	    _noteCache.rtree.insert(item);
 
-	      var item = events.selectAll('.community-event')
-	        .data(nextEvents);
+	    return note;
+	  },
+	  user: function parseUser(obj, uid) {
+	    var attrs = obj.attributes;
+	    var user = {
+	      id: uid,
+	      display_name: attrs.display_name && attrs.display_name.value,
+	      account_created: attrs.account_created && attrs.account_created.value,
+	      changesets_count: '0',
+	      active_blocks: '0'
+	    };
+	    var img = obj.getElementsByTagName('img');
 
-	      var itemEnter = item.enter()
-	        .append('div')
-	        .attr('class', 'community-event');
+	    if (img && img[0] && img[0].getAttribute('href')) {
+	      user.image_url = img[0].getAttribute('href');
+	    }
 
-	      itemEnter
-	        .append('div')
-	        .attr('class', 'community-event-name')
-	        .append('a')
-	        .attr('target', '_blank')
-	        .attr('href', function (d) { return d.url; })
-	        .text(function (d) {
-	          var name = d.name;
-	          if (d.i18n && d.id) {
-	            name = _t(("community." + communityID + ".events." + (d.id) + ".name"), { default: name });
-	          }
-	          return name;
-	        });
+	    var changesets = obj.getElementsByTagName('changesets');
 
-	      itemEnter
-	        .append('div')
-	        .attr('class', 'community-event-when')
-	        .text(function (d) {
-	          var options = { weekday: 'short', day: 'numeric', month: 'short', year: 'numeric' };
-	          if (d.date.getHours() || d.date.getMinutes()) {   // include time if it has one
-	            options.hour = 'numeric';
-	            options.minute = 'numeric';
-	          }
-	          return d.date.toLocaleString(_mainLocalizer.localeCode(), options);
-	        });
+	    if (changesets && changesets[0] && changesets[0].getAttribute('count')) {
+	      user.changesets_count = changesets[0].getAttribute('count');
+	    }
 
-	      itemEnter
-	        .append('div')
-	        .attr('class', 'community-event-where')
-	        .text(function (d) {
-	          var where = d.where;
-	          if (d.i18n && d.id) {
-	            where = _t(("community." + communityID + ".events." + (d.id) + ".where"), { default: where });
-	          }
-	          return where;
-	        });
+	    var blocks = obj.getElementsByTagName('blocks');
 
-	      itemEnter
-	        .append('div')
-	        .attr('class', 'community-event-description')
-	        .text(function (d) {
-	          var description = d.description;
-	          if (d.i18n && d.id) {
-	            description = _t(("community." + communityID + ".events." + (d.id) + ".description"), { default: description });
-	          }
-	          return description;
-	        });
+	    if (blocks && blocks[0]) {
+	      var received = blocks[0].getElementsByTagName('received');
+
+	      if (received && received[0] && received[0].getAttribute('active')) {
+	        user.active_blocks = received[0].getAttribute('active');
+	      }
 	    }
 
+	    _userCache.user[uid] = user;
+	    delete _userCache.toLoad[uid];
+	    return user;
+	  }
+	};
+
+	function parseXML(xml, callback, options) {
+	  options = Object.assign({
+	    skipSeen: true
+	  }, options);
+
+	  if (!xml || !xml.childNodes) {
+	    return callback({
+	      message: 'No XML',
+	      status: -1
+	    });
+	  }
+
+	  var root = xml.childNodes[0];
+	  var children = root.childNodes;
+	  var handle = window.requestIdleCallback(function () {
+	    _deferred["delete"](handle);
+
+	    var results = [];
+	    var result;
 
-	    function linkify(url, text) {
-	      text = text || url;
-	      return ("<a target=\"_blank\" href=\"" + url + "\">" + text + "</a>");
+	    for (var i = 0; i < children.length; i++) {
+	      result = parseChild(children[i]);
+	      if (result) results.push(result);
 	    }
-	  }
 
+	    callback(null, results);
+	  });
 
-	  success.changeset = function(val) {
-	    if (!arguments.length) { return _changeset; }
-	    _changeset = val;
-	    return success;
-	  };
+	  _deferred.add(handle);
 
+	  function parseChild(child) {
+	    var parser = parsers[child.nodeName];
+	    if (!parser) return null;
+	    var uid;
 
-	  success.location = function(val) {
-	    if (!arguments.length) { return _location; }
-	    _location = val;
-	    return success;
-	  };
+	    if (child.nodeName === 'user') {
+	      uid = child.attributes.id.value;
 
+	      if (options.skipSeen && _userCache.user[uid]) {
+	        delete _userCache.toLoad[uid];
+	        return null;
+	      }
+	    } else if (child.nodeName === 'note') {
+	      uid = child.getElementsByTagName('id')[0].textContent;
+	    } else {
+	      uid = osmEntity.id.fromOSM(child.nodeName, child.attributes.id.value);
 
-	  return utilRebind(success, dispatch$1, 'on');
-	}
+	      if (options.skipSeen) {
+	        if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity
 
-	function modeSave(context) {
-	    var mode = { id: 'save' };
-	    var keybinding = utilKeybinding('modeSave');
+	        _tileCache.seen[uid] = true;
+	      }
+	    }
 
-	    var commit = uiCommit(context)
-	        .on('cancel', cancel);
-	    var _conflictsUi; // uiConflicts
+	    return parser(child, uid);
+	  }
+	} // replace or remove note from rtree
 
-	    var _location;
-	    var _success;
 
-	    var uploader = context.uploader()
-	        .on('saveStarted.modeSave', function() {
-	            keybindingOff();
-	        })
-	        // fire off some async work that we want to be ready later
-	        .on('willAttemptUpload.modeSave', prepareForSuccess)
-	        .on('progressChanged.modeSave', showProgress)
-	        .on('resultNoChanges.modeSave', function() {
-	            cancel();
-	        })
-	        .on('resultErrors.modeSave', showErrors)
-	        .on('resultConflicts.modeSave', showConflicts)
-	        .on('resultSuccess.modeSave', showSuccess);
+	function updateRtree(item, replace) {
+	  _noteCache.rtree.remove(item, function isEql(a, b) {
+	    return a.data.id === b.data.id;
+	  });
+
+	  if (replace) {
+	    _noteCache.rtree.insert(item);
+	  }
+	}
 
+	function wrapcb(thisArg, callback, cid) {
+	  return function (err, result) {
+	    if (err) {
+	      // 400 Bad Request, 401 Unauthorized, 403 Forbidden..
+	      if (err.status === 400 || err.status === 401 || err.status === 403) {
+	        thisArg.logout();
+	      }
 
-	    function cancel() {
-	        context.enter(modeBrowse(context));
+	      return callback.call(thisArg, err);
+	    } else if (thisArg.getConnectionId() !== cid) {
+	      return callback.call(thisArg, {
+	        message: 'Connection Switched',
+	        status: -1
+	      });
+	    } else {
+	      return callback.call(thisArg, err, result);
 	    }
+	  };
+	}
 
+	var serviceOsm = {
+	  init: function init() {
+	    utilRebind(this, dispatch$2, 'on');
+	  },
+	  reset: function reset() {
+	    Array.from(_deferred).forEach(function (handle) {
+	      window.cancelIdleCallback(handle);
 
-	    function showProgress(num, total) {
-	        var modal = context.container().select('.loading-modal .modal-section');
-	        var progress = modal.selectAll('.progress')
-	            .data([0]);
+	      _deferred["delete"](handle);
+	    });
+	    _connectionID++;
+	    _userChangesets = undefined;
+	    _userDetails = undefined;
+	    _rateLimitError = undefined;
+	    Object.values(_tileCache.inflight).forEach(abortRequest$2);
+	    Object.values(_noteCache.inflight).forEach(abortRequest$2);
+	    Object.values(_noteCache.inflightPost).forEach(abortRequest$2);
+	    if (_changeset.inflight) abortRequest$2(_changeset.inflight);
+	    _tileCache = {
+	      toLoad: {},
+	      loaded: {},
+	      inflight: {},
+	      seen: {},
+	      rtree: new RBush()
+	    };
+	    _noteCache = {
+	      toLoad: {},
+	      loaded: {},
+	      inflight: {},
+	      inflightPost: {},
+	      note: {},
+	      closed: {},
+	      rtree: new RBush()
+	    };
+	    _userCache = {
+	      toLoad: {},
+	      user: {}
+	    };
+	    _cachedApiStatus = undefined;
+	    _changeset = {};
+	    return this;
+	  },
+	  getConnectionId: function getConnectionId() {
+	    return _connectionID;
+	  },
+	  changesetURL: function changesetURL(changesetID) {
+	    return urlroot + '/changeset/' + changesetID;
+	  },
+	  changesetsURL: function changesetsURL(center, zoom) {
+	    var precision = Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
+	    return urlroot + '/history#map=' + Math.floor(zoom) + '/' + center[1].toFixed(precision) + '/' + center[0].toFixed(precision);
+	  },
+	  entityURL: function entityURL(entity) {
+	    return urlroot + '/' + entity.type + '/' + entity.osmId();
+	  },
+	  historyURL: function historyURL(entity) {
+	    return urlroot + '/' + entity.type + '/' + entity.osmId() + '/history';
+	  },
+	  userURL: function userURL(username) {
+	    return urlroot + '/user/' + username;
+	  },
+	  noteURL: function noteURL(note) {
+	    return urlroot + '/note/' + note.id;
+	  },
+	  noteReportURL: function noteReportURL(note) {
+	    return urlroot + '/reports/new?reportable_type=Note&reportable_id=' + note.id;
+	  },
+	  // Generic method to load data from the OSM API
+	  // Can handle either auth or unauth calls.
+	  loadFromAPI: function loadFromAPI(path, callback, options) {
+	    options = Object.assign({
+	      skipSeen: true
+	    }, options);
+	    var that = this;
+	    var cid = _connectionID;
 
-	        // enter/update
-	        progress.enter()
-	            .append('div')
-	            .attr('class', 'progress')
-	            .merge(progress)
-	            .text(_t('save.conflict_progress', { num: num, total: total }));
+	    function done(err, payload) {
+	      if (that.getConnectionId() !== cid) {
+	        if (callback) callback({
+	          message: 'Connection Switched',
+	          status: -1
+	        });
+	        return;
+	      }
+
+	      var isAuthenticated = that.authenticated(); // 400 Bad Request, 401 Unauthorized, 403 Forbidden
+	      // Logout and retry the request..
+
+	      if (isAuthenticated && err && err.status && (err.status === 400 || err.status === 401 || err.status === 403)) {
+	        that.logout();
+	        that.loadFromAPI(path, callback, options); // else, no retry..
+	      } else {
+	        // 509 Bandwidth Limit Exceeded, 429 Too Many Requests
+	        // Set the rateLimitError flag and trigger a warning..
+	        if (!isAuthenticated && !_rateLimitError && err && err.status && (err.status === 509 || err.status === 429)) {
+	          _rateLimitError = err;
+	          dispatch$2.call('change');
+	          that.reloadApiStatus();
+	        } else if (err && _cachedApiStatus === 'online' || !err && _cachedApiStatus !== 'online') {
+	          // If the response's error state doesn't match the status,
+	          // it's likely we lost or gained the connection so reload the status
+	          that.reloadApiStatus();
+	        }
+
+	        if (callback) {
+	          if (err) {
+	            return callback(err);
+	          } else {
+	            if (path.indexOf('.json') !== -1) {
+	              return parseJSON(payload, callback, options);
+	            } else {
+	              return parseXML(payload, callback, options);
+	            }
+	          }
+	        }
+	      }
 	    }
 
+	    if (this.authenticated()) {
+	      return oauth.xhr({
+	        method: 'GET',
+	        path: path
+	      }, done);
+	    } else {
+	      var url = urlroot + path;
+	      var controller = new AbortController();
+	      var fn;
 
-	    function showConflicts(changeset, conflicts, origChanges) {
+	      if (path.indexOf('.json') !== -1) {
+	        fn = d3_json;
+	      } else {
+	        fn = d3_xml;
+	      }
 
-	        var selection = context.container()
-	            .select('.sidebar')
-	            .append('div')
-	            .attr('class','sidebar-component');
-
-	        context.container().selectAll('.main-content')
-	            .classed('active', true)
-	            .classed('inactive', false);
-
-	        _conflictsUi = uiConflicts(context)
-	            .conflictList(conflicts)
-	            .origChanges(origChanges)
-	            .on('cancel', function() {
-	                context.container().selectAll('.main-content')
-	                    .classed('active', false)
-	                    .classed('inactive', true);
-	                selection.remove();
-	                keybindingOn();
-
-	                uploader.cancelConflictResolution();
-	            })
-	            .on('save', function() {
-	                context.container().selectAll('.main-content')
-	                    .classed('active', false)
-	                    .classed('inactive', true);
-	                selection.remove();
-
-	                uploader.processResolvedConflicts(changeset);
-	            });
+	      fn(url, {
+	        signal: controller.signal
+	      }).then(function (data) {
+	        done(null, data);
+	      })["catch"](function (err) {
+	        if (err.name === 'AbortError') return; // d3-fetch includes status in the error message,
+	        // but we can't access the response itself
+	        // https://github.com/d3/d3-fetch/issues/27
+
+	        var match = err.message.match(/^\d{3}/);
+
+	        if (match) {
+	          done({
+	            status: +match[0],
+	            statusText: err.message
+	          });
+	        } else {
+	          done(err.message);
+	        }
+	      });
+	      return controller;
+	    }
+	  },
+	  // Load a single entity by id (ways and relations use the `/full` call to include
+	  // nodes and members). Parent relations are not included, see `loadEntityRelations`.
+	  // GET /api/0.6/node/#id
+	  // GET /api/0.6/[way|relation]/#id/full
+	  loadEntity: function loadEntity(id, callback) {
+	    var type = osmEntity.id.type(id);
+	    var osmID = osmEntity.id.toOSM(id);
+	    var options = {
+	      skipSeen: false
+	    };
+	    this.loadFromAPI('/api/0.6/' + type + '/' + osmID + (type !== 'node' ? '/full' : '') + '.json', function (err, entities) {
+	      if (callback) callback(err, {
+	        data: entities
+	      });
+	    }, options);
+	  },
+	  // Load a single entity with a specific version
+	  // GET /api/0.6/[node|way|relation]/#id/#version
+	  loadEntityVersion: function loadEntityVersion(id, version, callback) {
+	    var type = osmEntity.id.type(id);
+	    var osmID = osmEntity.id.toOSM(id);
+	    var options = {
+	      skipSeen: false
+	    };
+	    this.loadFromAPI('/api/0.6/' + type + '/' + osmID + '/' + version + '.json', function (err, entities) {
+	      if (callback) callback(err, {
+	        data: entities
+	      });
+	    }, options);
+	  },
+	  // Load the relations of a single entity with the given.
+	  // GET /api/0.6/[node|way|relation]/#id/relations
+	  loadEntityRelations: function loadEntityRelations(id, callback) {
+	    var type = osmEntity.id.type(id);
+	    var osmID = osmEntity.id.toOSM(id);
+	    var options = {
+	      skipSeen: false
+	    };
+	    this.loadFromAPI('/api/0.6/' + type + '/' + osmID + '/relations.json', function (err, entities) {
+	      if (callback) callback(err, {
+	        data: entities
+	      });
+	    }, options);
+	  },
+	  // Load multiple entities in chunks
+	  // (note: callback may be called multiple times)
+	  // Unlike `loadEntity`, child nodes and members are not fetched
+	  // GET /api/0.6/[nodes|ways|relations]?#parameters
+	  loadMultiple: function loadMultiple(ids, callback) {
+	    var that = this;
+	    var groups = utilArrayGroupBy(utilArrayUniq(ids), osmEntity.id.type);
+	    Object.keys(groups).forEach(function (k) {
+	      var type = k + 's'; // nodes, ways, relations
 
-	        selection.call(_conflictsUi);
+	      var osmIDs = groups[k].map(function (id) {
+	        return osmEntity.id.toOSM(id);
+	      });
+	      var options = {
+	        skipSeen: false
+	      };
+	      utilArrayChunk(osmIDs, 150).forEach(function (arr) {
+	        that.loadFromAPI('/api/0.6/' + type + '.json?' + type + '=' + arr.join(), function (err, entities) {
+	          if (callback) callback(err, {
+	            data: entities
+	          });
+	        }, options);
+	      });
+	    });
+	  },
+	  // Create, upload, and close a changeset
+	  // PUT /api/0.6/changeset/create
+	  // POST /api/0.6/changeset/#id/upload
+	  // PUT /api/0.6/changeset/#id/close
+	  putChangeset: function putChangeset(changeset, changes, callback) {
+	    var cid = _connectionID;
+
+	    if (_changeset.inflight) {
+	      return callback({
+	        message: 'Changeset already inflight',
+	        status: -2
+	      }, changeset);
+	    } else if (_changeset.open) {
+	      // reuse existing open changeset..
+	      return createdChangeset.call(this, null, _changeset.open);
+	    } else {
+	      // Open a new changeset..
+	      var options = {
+	        method: 'PUT',
+	        path: '/api/0.6/changeset/create',
+	        options: {
+	          header: {
+	            'Content-Type': 'text/xml'
+	          }
+	        },
+	        content: JXON.stringify(changeset.asJXON())
+	      };
+	      _changeset.inflight = oauth.xhr(options, wrapcb(this, createdChangeset, cid));
 	    }
 
+	    function createdChangeset(err, changesetID) {
+	      _changeset.inflight = null;
 
-	    function showErrors(errors) {
-	        keybindingOn();
+	      if (err) {
+	        return callback(err, changeset);
+	      }
 
-	        var selection = uiConfirm(context.container());
-	        selection
-	            .select('.modal-section.header')
-	            .append('h3')
-	            .text(_t('save.error'));
+	      _changeset.open = changesetID;
+	      changeset = changeset.update({
+	        id: changesetID
+	      }); // Upload the changeset..
 
-	        addErrors(selection, errors);
-	        selection.okButton();
+	      var options = {
+	        method: 'POST',
+	        path: '/api/0.6/changeset/' + changesetID + '/upload',
+	        options: {
+	          header: {
+	            'Content-Type': 'text/xml'
+	          }
+	        },
+	        content: JXON.stringify(changeset.osmChangeJXON(changes))
+	      };
+	      _changeset.inflight = oauth.xhr(options, wrapcb(this, uploadedChangeset, cid));
 	    }
 
+	    function uploadedChangeset(err) {
+	      _changeset.inflight = null;
+	      if (err) return callback(err, changeset); // Upload was successful, safe to call the callback.
+	      // Add delay to allow for postgres replication #1646 #2678
 
-	    function addErrors(selection, data) {
-	        var message = selection
-	            .select('.modal-section.message-text');
+	      window.setTimeout(function () {
+	        callback(null, changeset);
+	      }, 2500);
+	      _changeset.open = null; // At this point, we don't really care if the connection was switched..
+	      // Only try to close the changeset if we're still talking to the same server.
 
-	        var items = message
-	            .selectAll('.error-container')
-	            .data(data);
+	      if (this.getConnectionId() === cid) {
+	        // Still attempt to close changeset, but ignore response because #2667
+	        oauth.xhr({
+	          method: 'PUT',
+	          path: '/api/0.6/changeset/' + changeset.id + '/close',
+	          options: {
+	            header: {
+	              'Content-Type': 'text/xml'
+	            }
+	          }
+	        }, function () {
+	          return true;
+	        });
+	      }
+	    }
+	  },
+	  // Load multiple users in chunks
+	  // (note: callback may be called multiple times)
+	  // GET /api/0.6/users?users=#id1,#id2,...,#idn
+	  loadUsers: function loadUsers(uids, callback) {
+	    var toLoad = [];
+	    var cached = [];
+	    utilArrayUniq(uids).forEach(function (uid) {
+	      if (_userCache.user[uid]) {
+	        delete _userCache.toLoad[uid];
+	        cached.push(_userCache.user[uid]);
+	      } else {
+	        toLoad.push(uid);
+	      }
+	    });
 
-	        var enter = items.enter()
-	            .append('div')
-	            .attr('class', 'error-container');
-
-	        enter
-	            .append('a')
-	            .attr('class', 'error-description')
-	            .attr('href', '#')
-	            .classed('hide-toggle', true)
-	            .text(function(d) { return d.msg || _t('save.unknown_error_details'); })
-	            .on('click', function() {
-	                event.preventDefault();
-
-	                var error = select(this);
-	                var detail = select(this.nextElementSibling);
-	                var exp = error.classed('expanded');
-
-	                detail.style('display', exp ? 'none' : 'block');
-	                error.classed('expanded', !exp);
-	            });
+	    if (cached.length || !this.authenticated()) {
+	      callback(undefined, cached);
+	      if (!this.authenticated()) return; // require auth
+	    }
 
-	        var details = enter
-	            .append('div')
-	            .attr('class', 'error-detail-container')
-	            .style('display', 'none');
-
-	        details
-	            .append('ul')
-	            .attr('class', 'error-detail-list')
-	            .selectAll('li')
-	            .data(function(d) { return d.details || []; })
-	            .enter()
-	            .append('li')
-	            .attr('class', 'error-detail-item')
-	            .text(function(d) { return d; });
+	    utilArrayChunk(toLoad, 150).forEach(function (arr) {
+	      oauth.xhr({
+	        method: 'GET',
+	        path: '/api/0.6/users.json?users=' + arr.join()
+	      }, wrapcb(this, done, _connectionID));
+	    }.bind(this));
 
-	        items.exit()
-	            .remove();
+	    function done(err, payload) {
+	      if (err) return callback(err);
+	      var options = {
+	        skipSeen: true
+	      };
+	      return parseUserJSON(payload, function (err, results) {
+	        if (err) return callback(err);
+	        return callback(undefined, results);
+	      }, options);
+	    }
+	  },
+	  // Load a given user by id
+	  // GET /api/0.6/user/#id
+	  loadUser: function loadUser(uid, callback) {
+	    if (_userCache.user[uid] || !this.authenticated()) {
+	      // require auth
+	      delete _userCache.toLoad[uid];
+	      return callback(undefined, _userCache.user[uid]);
+	    }
+
+	    oauth.xhr({
+	      method: 'GET',
+	      path: '/api/0.6/user/' + uid + '.json'
+	    }, wrapcb(this, done, _connectionID));
+
+	    function done(err, payload) {
+	      if (err) return callback(err);
+	      var options = {
+	        skipSeen: true
+	      };
+	      return parseUserJSON(payload, function (err, results) {
+	        if (err) return callback(err);
+	        return callback(undefined, results[0]);
+	      }, options);
+	    }
+	  },
+	  // Load the details of the logged-in user
+	  // GET /api/0.6/user/details
+	  userDetails: function userDetails(callback) {
+	    if (_userDetails) {
+	      // retrieve cached
+	      return callback(undefined, _userDetails);
 	    }
 
+	    oauth.xhr({
+	      method: 'GET',
+	      path: '/api/0.6/user/details.json'
+	    }, wrapcb(this, done, _connectionID));
+
+	    function done(err, payload) {
+	      if (err) return callback(err);
+	      var options = {
+	        skipSeen: false
+	      };
+	      return parseUserJSON(payload, function (err, results) {
+	        if (err) return callback(err);
+	        _userDetails = results[0];
+	        return callback(undefined, _userDetails);
+	      }, options);
+	    }
+	  },
+	  // Load previous changesets for the logged in user
+	  // GET /api/0.6/changesets?user=#id
+	  userChangesets: function userChangesets(callback) {
+	    if (_userChangesets) {
+	      // retrieve cached
+	      return callback(undefined, _userChangesets);
+	    }
 
-	    function showSuccess(changeset) {
-	        commit.reset();
+	    this.userDetails(wrapcb(this, gotDetails, _connectionID));
 
-	        var ui = _success
-	            .changeset(changeset)
-	            .location(_location)
-	            .on('cancel', function() { context.ui().sidebar.hide(); });
+	    function gotDetails(err, user) {
+	      if (err) {
+	        return callback(err);
+	      }
 
-	        context.enter(modeBrowse(context).sidebar(ui));
+	      oauth.xhr({
+	        method: 'GET',
+	        path: '/api/0.6/changesets?user=' + user.id
+	      }, wrapcb(this, done, _connectionID));
 	    }
 
+	    function done(err, xml) {
+	      if (err) {
+	        return callback(err);
+	      }
 
-	    function keybindingOn() {
-	        select(document)
-	            .call(keybinding.on('⎋', cancel, true));
+	      _userChangesets = Array.prototype.map.call(xml.getElementsByTagName('changeset'), function (changeset) {
+	        return {
+	          tags: getTags(changeset)
+	        };
+	      }).filter(function (changeset) {
+	        var comment = changeset.tags.comment;
+	        return comment && comment !== '';
+	      });
+	      return callback(undefined, _userChangesets);
 	    }
+	  },
+	  // Fetch the status of the OSM API
+	  // GET /api/capabilities
+	  status: function status(callback) {
+	    var url = urlroot + '/api/capabilities';
+	    var errback = wrapcb(this, done, _connectionID);
+	    d3_xml(url).then(function (data) {
+	      errback(null, data);
+	    })["catch"](function (err) {
+	      errback(err.message);
+	    });
 
+	    function done(err, xml) {
+	      if (err) {
+	        // the status is null if no response could be retrieved
+	        return callback(err, null);
+	      } // update blocklists
 
-	    function keybindingOff() {
-	        select(document)
-	            .call(keybinding.unbind);
-	    }
 
+	      var elements = xml.getElementsByTagName('blacklist');
+	      var regexes = [];
 
-	    // Reverse geocode current map location so we can display a message on
-	    // the success screen like "Thank you for editing around place, region."
-	    function prepareForSuccess() {
-	        _success = uiSuccess(context);
-	        _location = null;
-	        if (!services.geocoder) { return; }
+	      for (var i = 0; i < elements.length; i++) {
+	        var regexString = elements[i].getAttribute('regex'); // needs unencode?
 
-	        services.geocoder.reverse(context.map().center(), function(err, result) {
-	            if (err || !result || !result.address) { return; }
+	        if (regexString) {
+	          try {
+	            var regex = new RegExp(regexString);
+	            regexes.push(regex);
+	          } catch (e) {
+	            /* noop */
+	          }
+	        }
+	      }
 
-	            var addr = result.address;
-	            var place = (addr && (addr.town || addr.city || addr.county)) || '';
-	            var region = (addr && (addr.state || addr.country)) || '';
-	            var separator = (place && region) ? _t('success.thank_you_where.separator') : '';
+	      if (regexes.length) {
+	        _imageryBlocklists = regexes;
+	      }
 
-	            _location = _t('success.thank_you_where.format',
-	                { place: place, separator: separator, region: region }
-	            );
+	      if (_rateLimitError) {
+	        return callback(_rateLimitError, 'rateLimited');
+	      } else {
+	        var waynodes = xml.getElementsByTagName('waynodes');
+	        var maxWayNodes = waynodes.length && parseInt(waynodes[0].getAttribute('maximum'), 10);
+	        if (maxWayNodes && isFinite(maxWayNodes)) _maxWayNodes = maxWayNodes;
+	        var apiStatus = xml.getElementsByTagName('status');
+	        var val = apiStatus[0].getAttribute('api');
+	        return callback(undefined, val);
+	      }
+	    }
+	  },
+	  // Calls `status` and dispatches an `apiStatusChange` event if the returned
+	  // status differs from the cached status.
+	  reloadApiStatus: function reloadApiStatus() {
+	    // throttle to avoid unnecessary API calls
+	    if (!this.throttledReloadApiStatus) {
+	      var that = this;
+	      this.throttledReloadApiStatus = throttle(function () {
+	        that.status(function (err, status) {
+	          if (status !== _cachedApiStatus) {
+	            _cachedApiStatus = status;
+	            dispatch$2.call('apiStatusChange', that, err, status);
+	          }
 	        });
+	      }, 500);
 	    }
 
+	    this.throttledReloadApiStatus();
+	  },
+	  // Returns the maximum number of nodes a single way can have
+	  maxWayNodes: function maxWayNodes() {
+	    return _maxWayNodes;
+	  },
+	  // Load data (entities) from the API in tiles
+	  // GET /api/0.6/map?bbox=
+	  loadTiles: function loadTiles(projection, callback) {
+	    if (_off) return; // determine the needed tiles to cover the view
 
-	    mode.selectedIDs = function() {
-	        return _conflictsUi ? _conflictsUi.shownEntityIds() : [];
-	    };
-
+	    var tiles = tiler$2.zoomExtent([_tileZoom, _tileZoom]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	    mode.enter = function() {
-	        // Show sidebar
-	        context.ui().sidebar.expand();
+	    var hadRequests = hasInflightRequests(_tileCache);
+	    abortUnwantedRequests(_tileCache, tiles);
 
-	        function done() {
-	            context.ui().sidebar.show(commit);
-	        }
+	    if (hadRequests && !hasInflightRequests(_tileCache)) {
+	      dispatch$2.call('loaded'); // stop the spinner
+	    } // issue new requests..
 
-	        keybindingOn();
 
-	        context.container().selectAll('.main-content')
-	            .classed('active', false)
-	            .classed('inactive', true);
+	    tiles.forEach(function (tile) {
+	      this.loadTile(tile, callback);
+	    }, this);
+	  },
+	  // Load a single data tile
+	  // GET /api/0.6/map?bbox=
+	  loadTile: function loadTile(tile, callback) {
+	    if (_off) return;
+	    if (_tileCache.loaded[tile.id] || _tileCache.inflight[tile.id]) return;
 
-	        var osm = context.connection();
-	        if (!osm) {
-	            cancel();
-	            return;
-	        }
+	    if (!hasInflightRequests(_tileCache)) {
+	      dispatch$2.call('loading'); // start the spinner
+	    }
 
-	        if (osm.authenticated()) {
-	            done();
-	        } else {
-	            osm.authenticate(function(err) {
-	                if (err) {
-	                    cancel();
-	                } else {
-	                    done();
-	                }
-	            });
-	        }
+	    var path = '/api/0.6/map.json?bbox=';
+	    var options = {
+	      skipSeen: true
 	    };
+	    _tileCache.inflight[tile.id] = this.loadFromAPI(path + tile.extent.toParam(), tileCallback, options);
 
+	    function tileCallback(err, parsed) {
+	      delete _tileCache.inflight[tile.id];
 
-	    mode.exit = function() {
+	      if (!err) {
+	        delete _tileCache.toLoad[tile.id];
+	        _tileCache.loaded[tile.id] = true;
+	        var bbox = tile.extent.bbox();
+	        bbox.id = tile.id;
 
-	        keybindingOff();
+	        _tileCache.rtree.insert(bbox);
+	      }
 
-	        context.container().selectAll('.main-content')
-	            .classed('active', true)
-	            .classed('inactive', false);
+	      if (callback) {
+	        callback(err, Object.assign({
+	          data: parsed
+	        }, tile));
+	      }
 
-	        context.ui().sidebar.hide();
-	    };
+	      if (!hasInflightRequests(_tileCache)) {
+	        dispatch$2.call('loaded'); // stop the spinner
+	      }
+	    }
+	  },
+	  isDataLoaded: function isDataLoaded(loc) {
+	    var bbox = {
+	      minX: loc[0],
+	      minY: loc[1],
+	      maxX: loc[0],
+	      maxY: loc[1]
+	    };
+	    return _tileCache.rtree.collides(bbox);
+	  },
+	  // load the tile that covers the given `loc`
+	  loadTileAtLoc: function loadTileAtLoc(loc, callback) {
+	    // Back off if the toLoad queue is filling up.. re #6417
+	    // (Currently `loadTileAtLoc` requests are considered low priority - used by operations to
+	    // let users safely edit geometries which extend to unloaded tiles.  We can drop some.)
+	    if (Object.keys(_tileCache.toLoad).length > 50) return;
+	    var k = geoZoomToScale(_tileZoom + 1);
+	    var offset = geoRawMercator().scale(k)(loc);
+	    var projection = geoRawMercator().transform({
+	      k: k,
+	      x: -offset[0],
+	      y: -offset[1]
+	    });
+	    var tiles = tiler$2.zoomExtent([_tileZoom, _tileZoom]).getTiles(projection);
+	    tiles.forEach(function (tile) {
+	      if (_tileCache.toLoad[tile.id] || _tileCache.loaded[tile.id] || _tileCache.inflight[tile.id]) return;
+	      _tileCache.toLoad[tile.id] = true;
+	      this.loadTile(tile, callback);
+	    }, this);
+	  },
+	  // Load notes from the API in tiles
+	  // GET /api/0.6/notes?bbox=
+	  loadNotes: function loadNotes(projection, noteOptions) {
+	    noteOptions = Object.assign({
+	      limit: 10000,
+	      closed: 7
+	    }, noteOptions);
+	    if (_off) return;
+	    var that = this;
+	    var path = '/api/0.6/notes?limit=' + noteOptions.limit + '&closed=' + noteOptions.closed + '&bbox=';
 
-	    return mode;
-	}
+	    var throttleLoadUsers = throttle(function () {
+	      var uids = Object.keys(_userCache.toLoad);
+	      if (!uids.length) return;
+	      that.loadUsers(uids, function () {}); // eagerly load user details
+	    }, 750); // determine the needed tiles to cover the view
 
-	function uiToolOldDrawModes(context) {
 
-	    var tool = {
-	        id: 'old_modes',
-	        label: _t('toolbar.add_feature')
-	    };
+	    var tiles = tiler$2.zoomExtent([_noteZoom, _noteZoom]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	    var modes = [
-	        modeAddPoint(context, {
-	            title: _t('modes.add_point.title'),
-	            button: 'point',
-	            description: _t('modes.add_point.description'),
-	            preset: _mainPresetIndex.item('point'),
-	            key: '1'
-	        }),
-	        modeAddLine(context, {
-	            title: _t('modes.add_line.title'),
-	            button: 'line',
-	            description: _t('modes.add_line.description'),
-	            preset: _mainPresetIndex.item('line'),
-	            key: '2'
-	        }),
-	        modeAddArea(context, {
-	            title: _t('modes.add_area.title'),
-	            button: 'area',
-	            description: _t('modes.add_area.description'),
-	            preset: _mainPresetIndex.item('area'),
-	            key: '3'
-	        })
-	    ];
+	    abortUnwantedRequests(_noteCache, tiles); // issue new requests..
 
+	    tiles.forEach(function (tile) {
+	      if (_noteCache.loaded[tile.id] || _noteCache.inflight[tile.id]) return;
+	      var options = {
+	        skipSeen: false
+	      };
+	      _noteCache.inflight[tile.id] = that.loadFromAPI(path + tile.extent.toParam(), function (err) {
+	        delete _noteCache.inflight[tile.id];
 
-	    function enabled() {
-	        return osmEditable();
-	    }
+	        if (!err) {
+	          _noteCache.loaded[tile.id] = true;
+	        }
 
-	    function osmEditable() {
-	        return context.editable();
+	        throttleLoadUsers();
+	        dispatch$2.call('loadedNotes');
+	      }, options);
+	    });
+	  },
+	  // Create a note
+	  // POST /api/0.6/notes?params
+	  postNoteCreate: function postNoteCreate(note, callback) {
+	    if (!this.authenticated()) {
+	      return callback({
+	        message: 'Not Authenticated',
+	        status: -3
+	      }, note);
 	    }
 
-	    modes.forEach(function(mode) {
-	        context.keybinding().on(mode.key, function() {
-	            if (!enabled()) { return; }
-
-	            if (mode.id === context.mode().id) {
-	                context.enter(modeBrowse(context));
-	            } else {
-	                context.enter(mode);
-	            }
-	        });
-	    });
+	    if (_noteCache.inflightPost[note.id]) {
+	      return callback({
+	        message: 'Note update already inflight',
+	        status: -2
+	      }, note);
+	    }
 
-	    tool.render = function(selection) {
+	    if (!note.loc[0] || !note.loc[1] || !note.newComment) return; // location & description required
 
-	        var wrap = selection
-	            .append('div')
-	            .attr('class', 'joined')
-	            .style('display', 'flex');
+	    var comment = note.newComment;
 
-	        var debouncedUpdate = debounce(update, 500, { leading: true, trailing: true });
+	    if (note.newCategory && note.newCategory !== 'None') {
+	      comment += ' #' + note.newCategory;
+	    }
 
-	        context.map()
-	            .on('move.modes', debouncedUpdate)
-	            .on('drawn.modes', debouncedUpdate);
+	    var path = '/api/0.6/notes?' + utilQsString({
+	      lon: note.loc[0],
+	      lat: note.loc[1],
+	      text: comment
+	    });
+	    _noteCache.inflightPost[note.id] = oauth.xhr({
+	      method: 'POST',
+	      path: path
+	    }, wrapcb(this, done, _connectionID));
 
-	        context
-	            .on('enter.modes', update);
+	    function done(err, xml) {
+	      delete _noteCache.inflightPost[note.id];
 
-	        update();
+	      if (err) {
+	        return callback(err);
+	      } // we get the updated note back, remove from caches and reparse..
 
 
-	        function update() {
+	      this.removeNote(note);
+	      var options = {
+	        skipSeen: false
+	      };
+	      return parseXML(xml, function (err, results) {
+	        if (err) {
+	          return callback(err);
+	        } else {
+	          return callback(undefined, results[0]);
+	        }
+	      }, options);
+	    }
+	  },
+	  // Update a note
+	  // POST /api/0.6/notes/#id/comment?text=comment
+	  // POST /api/0.6/notes/#id/close?text=comment
+	  // POST /api/0.6/notes/#id/reopen?text=comment
+	  postNoteUpdate: function postNoteUpdate(note, newStatus, callback) {
+	    if (!this.authenticated()) {
+	      return callback({
+	        message: 'Not Authenticated',
+	        status: -3
+	      }, note);
+	    }
+
+	    if (_noteCache.inflightPost[note.id]) {
+	      return callback({
+	        message: 'Note update already inflight',
+	        status: -2
+	      }, note);
+	    }
+
+	    var action;
+
+	    if (note.status !== 'closed' && newStatus === 'closed') {
+	      action = 'close';
+	    } else if (note.status !== 'open' && newStatus === 'open') {
+	      action = 'reopen';
+	    } else {
+	      action = 'comment';
+	      if (!note.newComment) return; // when commenting, comment required
+	    }
 
-	            var buttons = wrap.selectAll('button.add-button')
-	                .data(modes, function(d) { return d.id; });
+	    var path = '/api/0.6/notes/' + note.id + '/' + action;
 
-	            // exit
-	            buttons.exit()
-	                .remove();
+	    if (note.newComment) {
+	      path += '?' + utilQsString({
+	        text: note.newComment
+	      });
+	    }
 
-	            // enter
-	            var buttonsEnter = buttons.enter()
-	                .append('button')
-	                .attr('class', function(d) { return d.id + ' add-button bar-button'; })
-	                .on('click.mode-buttons', function(d) {
-	                    if (!enabled()) { return; }
+	    _noteCache.inflightPost[note.id] = oauth.xhr({
+	      method: 'POST',
+	      path: path
+	    }, wrapcb(this, done, _connectionID));
 
-	                    // When drawing, ignore accidental clicks on mode buttons - #4042
-	                    var currMode = context.mode().id;
-	                    if (/^draw/.test(currMode)) { return; }
+	    function done(err, xml) {
+	      delete _noteCache.inflightPost[note.id];
 
-	                    if (d.id === currMode) {
-	                        context.enter(modeBrowse(context));
-	                    } else {
-	                        context.enter(d);
-	                    }
-	                })
-	                .call(uiTooltip()
-	                    .placement('bottom')
-	                    .title(function(d) { return d.description; })
-	                    .keys(function(d) { return [d.key]; })
-	                    .scrollContainer(context.container().select('.top-toolbar'))
-	                );
+	      if (err) {
+	        return callback(err);
+	      } // we get the updated note back, remove from caches and reparse..
 
-	            buttonsEnter
-	                .each(function(d) {
-	                    select(this)
-	                        .call(svgIcon('#iD-icon-' + d.button));
-	                });
 
-	            buttonsEnter
-	                .append('span')
-	                .attr('class', 'label')
-	                .text(function(mode) { return mode.title; });
+	      this.removeNote(note); // update closed note cache - used to populate `closed:note` changeset tag
 
-	            // if we are adding/removing the buttons, check if toolbar has overflowed
-	            if (buttons.enter().size() || buttons.exit().size()) {
-	                context.ui().checkOverflow('.top-toolbar', true);
-	            }
+	      if (action === 'close') {
+	        _noteCache.closed[note.id] = true;
+	      } else if (action === 'reopen') {
+	        delete _noteCache.closed[note.id];
+	      }
 
-	            // update
-	            buttons = buttons
-	                .merge(buttonsEnter)
-	                .classed('disabled', function(d) { return !enabled(); })
-	                .classed('active', function(d) { return context.mode() && context.mode().button === d.button; });
+	      var options = {
+	        skipSeen: false
+	      };
+	      return parseXML(xml, function (err, results) {
+	        if (err) {
+	          return callback(err);
+	        } else {
+	          return callback(undefined, results[0]);
 	        }
-	    };
-
-	    return tool;
-	}
+	      }, options);
+	    }
+	  },
+	  "switch": function _switch(options) {
+	    urlroot = options.urlroot;
+	    oauth.options(Object.assign({
+	      url: urlroot,
+	      loading: authLoading,
+	      done: authDone
+	    }, options));
+	    this.reset();
+	    this.userChangesets(function () {}); // eagerly load user details/changesets
+
+	    dispatch$2.call('change');
+	    return this;
+	  },
+	  toggle: function toggle(val) {
+	    _off = !val;
+	    return this;
+	  },
+	  isChangesetInflight: function isChangesetInflight() {
+	    return !!_changeset.inflight;
+	  },
+	  // get/set cached data
+	  // This is used to save/restore the state when entering/exiting the walkthrough
+	  // Also used for testing purposes.
+	  caches: function caches(obj) {
+	    function cloneCache(source) {
+	      var target = {};
+	      Object.keys(source).forEach(function (k) {
+	        if (k === 'rtree') {
+	          target.rtree = new RBush().fromJSON(source.rtree.toJSON()); // clone rbush
+	        } else if (k === 'note') {
+	          target.note = {};
+	          Object.keys(source.note).forEach(function (id) {
+	            target.note[id] = osmNote(source.note[id]); // copy notes
+	          });
+	        } else {
+	          target[k] = JSON.parse(JSON.stringify(source[k])); // clone deep
+	        }
+	      });
+	      return target;
+	    }
 
-	function uiToolNotes(context) {
+	    if (!arguments.length) {
+	      return {
+	        tile: cloneCache(_tileCache),
+	        note: cloneCache(_noteCache),
+	        user: cloneCache(_userCache)
+	      };
+	    } // access caches directly for testing (e.g., loading notes rtree)
 
-	    var tool = {
-	        id: 'notes',
-	        label: _t('modes.add_note.label')
-	    };
 
-	    var mode = modeAddNote(context);
+	    if (obj === 'get') {
+	      return {
+	        tile: _tileCache,
+	        note: _noteCache,
+	        user: _userCache
+	      };
+	    }
 
-	    function enabled() {
-	        return notesEnabled() && notesEditable();
+	    if (obj.tile) {
+	      _tileCache = obj.tile;
+	      _tileCache.inflight = {};
 	    }
 
-	    function notesEnabled() {
-	        var noteLayer = context.layers().layer('notes');
-	        return noteLayer && noteLayer.enabled();
+	    if (obj.note) {
+	      _noteCache = obj.note;
+	      _noteCache.inflight = {};
+	      _noteCache.inflightPost = {};
 	    }
 
-	    function notesEditable() {
-	        var mode = context.mode();
-	        return context.map().notesEditable() && mode && mode.id !== 'save';
+	    if (obj.user) {
+	      _userCache = obj.user;
 	    }
 
-	    context.keybinding().on(mode.key, function() {
-	        if (!enabled()) { return; }
+	    return this;
+	  },
+	  logout: function logout() {
+	    _userChangesets = undefined;
+	    _userDetails = undefined;
+	    oauth.logout();
+	    dispatch$2.call('change');
+	    return this;
+	  },
+	  authenticated: function authenticated() {
+	    return oauth.authenticated();
+	  },
+	  authenticate: function authenticate(callback) {
+	    var that = this;
+	    var cid = _connectionID;
+	    _userChangesets = undefined;
+	    _userDetails = undefined;
 
-	        if (mode.id === context.mode().id) {
-	            context.enter(modeBrowse(context));
-	        } else {
-	            context.enter(mode);
-	        }
+	    function done(err, res) {
+	      if (err) {
+	        if (callback) callback(err);
+	        return;
+	      }
+
+	      if (that.getConnectionId() !== cid) {
+	        if (callback) callback({
+	          message: 'Connection Switched',
+	          status: -1
+	        });
+	        return;
+	      }
+
+	      _rateLimitError = undefined;
+	      dispatch$2.call('change');
+	      if (callback) callback(err, res);
+	      that.userChangesets(function () {}); // eagerly load user details/changesets
+	    }
+
+	    return oauth.authenticate(done);
+	  },
+	  imageryBlocklists: function imageryBlocklists() {
+	    return _imageryBlocklists;
+	  },
+	  tileZoom: function tileZoom(val) {
+	    if (!arguments.length) return _tileZoom;
+	    _tileZoom = val;
+	    return this;
+	  },
+	  // get all cached notes covering the viewport
+	  notes: function notes(projection) {
+	    var viewport = projection.clipExtent();
+	    var min = [viewport[0][0], viewport[1][1]];
+	    var max = [viewport[1][0], viewport[0][1]];
+	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	    return _noteCache.rtree.search(bbox).map(function (d) {
+	      return d.data;
 	    });
+	  },
+	  // get a single note from the cache
+	  getNote: function getNote(id) {
+	    return _noteCache.note[id];
+	  },
+	  // remove a single note from the cache
+	  removeNote: function removeNote(note) {
+	    if (!(note instanceof osmNote) || !note.id) return;
+	    delete _noteCache.note[note.id];
+	    updateRtree(encodeNoteRtree(note), false); // false = remove
+	  },
+	  // replace a single note in the cache
+	  replaceNote: function replaceNote(note) {
+	    if (!(note instanceof osmNote) || !note.id) return;
+	    _noteCache.note[note.id] = note;
+	    updateRtree(encodeNoteRtree(note), true); // true = replace
 
-	    tool.render = function(selection) {
+	    return note;
+	  },
+	  // Get an array of note IDs closed during this session.
+	  // Used to populate `closed:note` changeset tag
+	  getClosedIDs: function getClosedIDs() {
+	    return Object.keys(_noteCache.closed).sort();
+	  }
+	};
 
+	var _apibase$1 = 'https://wiki.openstreetmap.org/w/api.php';
+	var _inflight$1 = {};
+	var _wikibaseCache = {};
+	var _localeIDs = {
+	  en: false
+	};
 
-	        var debouncedUpdate = debounce(update, 500, { leading: true, trailing: true });
+	var debouncedRequest$1 = debounce(request$1, 500, {
+	  leading: false
+	});
 
-	        context.map()
-	            .on('move.notes', debouncedUpdate)
-	            .on('drawn.notes', debouncedUpdate);
+	function request$1(url, callback) {
+	  if (_inflight$1[url]) return;
+	  var controller = new AbortController();
+	  _inflight$1[url] = controller;
+	  d3_json(url, {
+	    signal: controller.signal
+	  }).then(function (result) {
+	    delete _inflight$1[url];
+	    if (callback) callback(null, result);
+	  })["catch"](function (err) {
+	    delete _inflight$1[url];
+	    if (err.name === 'AbortError') return;
+	    if (callback) callback(err.message);
+	  });
+	}
 
-	        context
-	            .on('enter.notes', update);
+	var serviceOsmWikibase = {
+	  init: function init() {
+	    _inflight$1 = {};
+	    _wikibaseCache = {};
+	    _localeIDs = {};
+	  },
+	  reset: function reset() {
+	    Object.values(_inflight$1).forEach(function (controller) {
+	      controller.abort();
+	    });
+	    _inflight$1 = {};
+	  },
 
-	        update();
+	  /**
+	   * Get the best value for the property, or undefined if not found
+	   * @param entity object from wikibase
+	   * @param property string e.g. 'P4' for image
+	   * @param langCode string e.g. 'fr' for French
+	   */
+	  claimToValue: function claimToValue(entity, property, langCode) {
+	    if (!entity.claims[property]) return undefined;
+	    var locale = _localeIDs[langCode];
+	    var preferredPick, localePick;
+	    entity.claims[property].forEach(function (stmt) {
+	      // If exists, use value limited to the needed language (has a qualifier P26 = locale)
+	      // Or if not found, use the first value with the "preferred" rank
+	      if (!preferredPick && stmt.rank === 'preferred') {
+	        preferredPick = stmt;
+	      }
 
+	      if (locale && stmt.qualifiers && stmt.qualifiers.P26 && stmt.qualifiers.P26[0].datavalue.value.id === locale) {
+	        localePick = stmt;
+	      }
+	    });
+	    var result = localePick || preferredPick;
 
-	        function update() {
-	            var showNotes = notesEnabled();
-	            var data = showNotes ? [mode] : [];
+	    if (result) {
+	      var datavalue = result.mainsnak.datavalue;
+	      return datavalue.type === 'wikibase-entityid' ? datavalue.value.id : datavalue.value;
+	    } else {
+	      return undefined;
+	    }
+	  },
 
-	            var buttons = selection.selectAll('button.add-button')
-	                .data(data, function(d) { return d.id; });
+	  /**
+	   * Convert monolingual property into a key-value object (language -> value)
+	   * @param entity object from wikibase
+	   * @param property string e.g. 'P31' for monolingual wiki page title
+	   */
+	  monolingualClaimToValueObj: function monolingualClaimToValueObj(entity, property) {
+	    if (!entity || !entity.claims[property]) return undefined;
+	    return entity.claims[property].reduce(function (acc, obj) {
+	      var value = obj.mainsnak.datavalue.value;
+	      acc[value.language] = value.text;
+	      return acc;
+	    }, {});
+	  },
+	  toSitelink: function toSitelink(key, value) {
+	    var result = value ? 'Tag:' + key + '=' + value : 'Key:' + key;
+	    return result.replace(/_/g, ' ').trim();
+	  },
+	  //
+	  // Pass params object of the form:
+	  // {
+	  //   key: 'string',
+	  //   value: 'string',
+	  //   langCode: 'string'
+	  // }
+	  //
+	  getEntity: function getEntity(params, callback) {
+	    var doRequest = params.debounce ? debouncedRequest$1 : request$1;
+	    var that = this;
+	    var titles = [];
+	    var result = {};
+	    var rtypeSitelink = params.key === 'type' && params.value ? ('Relation:' + params.value).replace(/_/g, ' ').trim() : false;
+	    var keySitelink = params.key ? this.toSitelink(params.key) : false;
+	    var tagSitelink = params.key && params.value ? this.toSitelink(params.key, params.value) : false;
+	    var localeSitelink;
+
+	    if (params.langCodes) {
+	      params.langCodes.forEach(function (langCode) {
+	        if (_localeIDs[langCode] === undefined) {
+	          // If this is the first time we are asking about this locale,
+	          // fetch corresponding entity (if it exists), and cache it.
+	          // If there is no such entry, cache `false` value to avoid re-requesting it.
+	          localeSitelink = ('Locale:' + langCode).replace(/_/g, ' ').trim();
+	          titles.push(localeSitelink);
+	        }
+	      });
+	    }
 
-	            // exit
-	            buttons.exit()
-	                .remove();
+	    if (rtypeSitelink) {
+	      if (_wikibaseCache[rtypeSitelink]) {
+	        result.rtype = _wikibaseCache[rtypeSitelink];
+	      } else {
+	        titles.push(rtypeSitelink);
+	      }
+	    }
 
-	            // enter
-	            var buttonsEnter = buttons.enter()
-	                .append('button')
-	                .attr('tabindex', -1)
-	                .attr('class', function(d) { return d.id + ' add-button bar-button'; })
-	                .on('click.notes', function(d) {
-	                    if (!enabled()) { return; }
+	    if (keySitelink) {
+	      if (_wikibaseCache[keySitelink]) {
+	        result.key = _wikibaseCache[keySitelink];
+	      } else {
+	        titles.push(keySitelink);
+	      }
+	    }
 
-	                    // When drawing, ignore accidental clicks on mode buttons - #4042
-	                    var currMode = context.mode().id;
-	                    if (/^draw/.test(currMode)) { return; }
+	    if (tagSitelink) {
+	      if (_wikibaseCache[tagSitelink]) {
+	        result.tag = _wikibaseCache[tagSitelink];
+	      } else {
+	        titles.push(tagSitelink);
+	      }
+	    }
 
-	                    if (d.id === currMode) {
-	                        context.enter(modeBrowse(context));
-	                    } else {
-	                        context.enter(d);
-	                    }
-	                })
-	                .call(uiTooltip()
-	                    .placement('bottom')
-	                    .title(function(d) { return d.description; })
-	                    .keys(function(d) { return [d.key]; })
-	                    .scrollContainer(context.container().select('.top-toolbar'))
-	                );
+	    if (!titles.length) {
+	      // Nothing to do, we already had everything in the cache
+	      return callback(null, result);
+	    } // Requesting just the user language code
+	    // If backend recognizes the code, it will perform proper fallbacks,
+	    // and the result will contain the requested code. If not, all values are returned:
+	    // {"zh-tw":{"value":"...","language":"zh-tw","source-language":"zh-hant"}
+	    // {"pt-br":{"value":"...","language":"pt","for-language":"pt-br"}}
 
-	            buttonsEnter
-	                .each(function(d) {
-	                    select(this)
-	                        .call(svgIcon(d.icon || '#iD-icon-' + d.button));
-	                });
 
-	            // if we are adding/removing the buttons, check if toolbar has overflowed
-	            if (buttons.enter().size() || buttons.exit().size()) {
-	                context.ui().checkOverflow('.top-toolbar', true);
+	    var obj = {
+	      action: 'wbgetentities',
+	      sites: 'wiki',
+	      titles: titles.join('|'),
+	      languages: params.langCodes.join('|'),
+	      languagefallback: 1,
+	      origin: '*',
+	      format: 'json' // There is an MW Wikibase API bug https://phabricator.wikimedia.org/T212069
+	      // We shouldn't use v1 until it gets fixed, but should switch to it afterwards
+	      // formatversion: 2,
+
+	    };
+	    var url = _apibase$1 + '?' + utilQsString(obj);
+	    doRequest(url, function (err, d) {
+	      if (err) {
+	        callback(err);
+	      } else if (!d.success || d.error) {
+	        callback(d.error.messages.map(function (v) {
+	          return v.html['*'];
+	        }).join('<br>'));
+	      } else {
+	        var localeID = false;
+	        Object.values(d.entities).forEach(function (res) {
+	          if (res.missing !== '') {
+	            var title = res.sitelinks.wiki.title;
+
+	            if (title === rtypeSitelink) {
+	              _wikibaseCache[rtypeSitelink] = res;
+	              result.rtype = res;
+	            } else if (title === keySitelink) {
+	              _wikibaseCache[keySitelink] = res;
+	              result.key = res;
+	            } else if (title === tagSitelink) {
+	              _wikibaseCache[tagSitelink] = res;
+	              result.tag = res;
+	            } else if (title === localeSitelink) {
+	              localeID = res.id;
+	            } else {
+	              console.log('Unexpected title ' + title); // eslint-disable-line no-console
 	            }
+	          }
+	        });
 
-	            // update
-	            buttons = buttons
-	                .merge(buttonsEnter)
-	                .classed('disabled', function(d) { return !enabled(); })
-	                .classed('active', function(d) { return context.mode() && context.mode().button === d.button; });
+	        if (localeSitelink) {
+	          // If locale ID is not found, store false to prevent repeated queries
+	          that.addLocale(params.langCodes[0], localeID);
 	        }
-	    };
 
-	    tool.uninstall = function() {
-	        context
-	            .on('enter.editor.notes', null)
-	            .on('exit.editor.notes', null)
-	            .on('enter.notes', null);
+	        callback(null, result);
+	      }
+	    });
+	  },
+	  //
+	  // Pass params object of the form:
+	  // {
+	  //   key: 'string',     // required
+	  //   value: 'string'    // optional
+	  // }
+	  //
+	  // Get an result object used to display tag documentation
+	  // {
+	  //   title:        'string',
+	  //   description:  'string',
+	  //   editURL:      'string',
+	  //   imageURL:     'string',
+	  //   wiki:         { title: 'string', text: 'string', url: 'string' }
+	  // }
+	  //
+	  getDocs: function getDocs(params, callback) {
+	    var that = this;
+	    var langCodes = _mainLocalizer.localeCodes().map(function (code) {
+	      return code.toLowerCase();
+	    });
+	    params.langCodes = langCodes;
+	    this.getEntity(params, function (err, data) {
+	      if (err) {
+	        callback(err);
+	        return;
+	      }
 
-	        context.map()
-	            .on('move.notes', null)
-	            .on('drawn.notes', null);
-	    };
+	      var entity = data.rtype || data.tag || data.key;
 
-	    return tool;
-	}
+	      if (!entity) {
+	        callback('No entity');
+	        return;
+	      }
 
-	function uiToolSave(context) {
+	      var i;
+	      var description;
 
-	    var tool = {
-	        id: 'save',
-	        label: _t('save.title')
-	    };
+	      for (i in langCodes) {
+	        var _code = langCodes[i];
 
-	    var button = null;
-	    var tooltipBehavior = null;
-	    var history = context.history();
-	    var key = uiCmd('⌘S');
-	    var _numChanges = 0;
+	        if (entity.descriptions[_code] && entity.descriptions[_code].language === _code) {
+	          description = entity.descriptions[_code];
+	          break;
+	        }
+	      }
 
-	    function isSaving() {
-	        var mode = context.mode();
-	        return mode && mode.id === 'save';
-	    }
+	      if (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result
 
-	    function isDisabled() {
-	        return _numChanges === 0 || isSaving();
-	    }
+	      var result = {
+	        title: entity.title,
+	        description: description ? description.value : '',
+	        descriptionLocaleCode: description ? description.language : '',
+	        editURL: 'https://wiki.openstreetmap.org/wiki/' + entity.title
+	      }; // add image
+
+	      if (entity.claims) {
+	        var imageroot;
+	        var image = that.claimToValue(entity, 'P4', langCodes[0]);
+
+	        if (image) {
+	          imageroot = 'https://commons.wikimedia.org/w/index.php';
+	        } else {
+	          image = that.claimToValue(entity, 'P28', langCodes[0]);
 
-	    function save() {
-	        event.preventDefault();
-	        if (!context.inIntro() && !isSaving() && history.hasChanges()) {
-	            context.enter(modeSave(context));
+	          if (image) {
+	            imageroot = 'https://wiki.openstreetmap.org/w/index.php';
+	          }
 	        }
-	    }
 
-	    function bgColor() {
-	        var step;
-	        if (_numChanges === 0) {
-	            return null;
-	        } else if (_numChanges <= 50) {
-	            step = _numChanges / 50;
-	            return d3_interpolateRgb('#fff', '#ff8')(step);  // white -> yellow
-	        } else {
-	            step = Math.min((_numChanges - 50) / 50, 1.0);
-	            return d3_interpolateRgb('#ff8', '#f88')(step);  // yellow -> red
+	        if (imageroot && image) {
+	          result.imageURL = imageroot + '?' + utilQsString({
+	            title: 'Special:Redirect/file/' + image,
+	            width: 400
+	          });
 	        }
-	    }
+	      } // Try to get a wiki page from tag data item first, followed by the corresponding key data item.
+	      // If neither tag nor key data item contain a wiki page in the needed language nor English,
+	      // get the first found wiki page from either the tag or the key item.
 
-	    function updateCount() {
-	        var val = history.difference().summary().length;
-	        if (val === _numChanges) { return; }
 
-	        _numChanges = val;
+	      var rtypeWiki = that.monolingualClaimToValueObj(data.rtype, 'P31');
+	      var tagWiki = that.monolingualClaimToValueObj(data.tag, 'P31');
+	      var keyWiki = that.monolingualClaimToValueObj(data.key, 'P31');
+	      var wikis = [rtypeWiki, tagWiki, keyWiki];
 
-	        if (tooltipBehavior) {
-	            tooltipBehavior
-	                .title(_t(_numChanges > 0 ? 'save.help' : 'save.no_changes'))
-	                .keys([key]);
-	        }
+	      for (i in wikis) {
+	        var wiki = wikis[i];
 
-	        if (button) {
-	            button
-	                .classed('disabled', isDisabled())
-	                .style('background', bgColor());
+	        for (var j in langCodes) {
+	          var code = langCodes[j];
+	          var referenceId = langCodes[0].split('-')[0] !== 'en' && code.split('-')[0] === 'en' ? 'inspector.wiki_en_reference' : 'inspector.wiki_reference';
+	          var info = getWikiInfo(wiki, code, referenceId);
 
-	            button.select('span.count')
-	                .text(_numChanges);
+	          if (info) {
+	            result.wiki = info;
+	            break;
+	          }
 	        }
-	    }
-
-
-	    tool.render = function(selection) {
-	        tooltipBehavior = uiTooltip()
-	            .placement('bottom')
-	            .title(_t('save.no_changes'))
-	            .keys([key])
-	            .scrollContainer(context.container().select('.top-toolbar'));
 
-	        var lastPointerUpType;
+	        if (result.wiki) break;
+	      }
 
-	        button = selection
-	            .append('button')
-	            .attr('class', 'save disabled bar-button')
-	            .on('pointerup', function() {
-	                lastPointerUpType = event.pointerType;
-	            })
-	            .on('click', function() {
-	                event.preventDefault();
+	      callback(null, result); // Helper method to get wiki info if a given language exists
 
-	                save();
+	      function getWikiInfo(wiki, langCode, tKey) {
+	        if (wiki && wiki[langCode]) {
+	          return {
+	            title: wiki[langCode],
+	            text: tKey,
+	            url: 'https://wiki.openstreetmap.org/wiki/' + wiki[langCode]
+	          };
+	        }
+	      }
+	    });
+	  },
+	  addLocale: function addLocale(langCode, qid) {
+	    // Makes it easier to unit test
+	    _localeIDs[langCode] = qid;
+	  },
+	  apibase: function apibase(val) {
+	    if (!arguments.length) return _apibase$1;
+	    _apibase$1 = val;
+	    return this;
+	  }
+	};
 
-	                if (_numChanges === 0 && (
-	                    lastPointerUpType === 'touch' ||
-	                    lastPointerUpType === 'pen')
-	                ) {
-	                    // there are no tooltips for touch interactions so flash feedback instead
-	                    context.ui().flash
-	                        .duration(2000)
-	                        .iconName('#iD-icon-save')
-	                        .iconClass('disabled')
-	                        .text(_t('save.no_changes'))();
-	                }
-	                lastPointerUpType = null;
-	            })
-	            .call(tooltipBehavior);
+	var jsonpCache = {};
+	window.jsonpCache = jsonpCache;
+	function jsonpRequest(url, callback) {
+	  var request = {
+	    abort: function abort() {}
+	  };
 
-	        button
-	            .call(svgIcon('#iD-icon-save'));
+	  if (window.JSONP_FIX) {
+	    if (window.JSONP_DELAY === 0) {
+	      callback(window.JSONP_FIX);
+	    } else {
+	      var t = window.setTimeout(function () {
+	        callback(window.JSONP_FIX);
+	      }, window.JSONP_DELAY || 0);
 
-	        button
-	            .append('span')
-	            .attr('class', 'count')
-	            .attr('aria-hidden', 'true')
-	            .text('0');
+	      request.abort = function () {
+	        window.clearTimeout(t);
+	      };
+	    }
 
-	        updateCount();
+	    return request;
+	  }
 
+	  function rand() {
+	    var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
+	    var c = '';
+	    var i = -1;
 
-	        context.keybinding()
-	            .on(key, save, true);
+	    while (++i < 15) {
+	      c += chars.charAt(Math.floor(Math.random() * 52));
+	    }
 
+	    return c;
+	  }
 
-	        context.history()
-	            .on('change.save', updateCount);
+	  function create(url) {
+	    var e = url.match(/callback=(\w+)/);
+	    var c = e ? e[1] : rand();
 
-	        context
-	            .on('enter.save', function() {
-	                if (button) {
-	                    button
-	                        .classed('disabled', isDisabled());
+	    jsonpCache[c] = function (data) {
+	      if (jsonpCache[c]) {
+	        callback(data);
+	      }
 
-	                    if (isSaving()) {
-	                        button.call(tooltipBehavior.hide);
-	                    }
-	                }
-	            });
+	      finalize();
 	    };
 
+	    function finalize() {
+	      delete jsonpCache[c];
+	      script.remove();
+	    }
+
+	    request.abort = finalize;
+	    return 'jsonpCache.' + c;
+	  }
 
-	    tool.uninstall = function() {
-	        context.keybinding()
-	            .off(key, true);
+	  var cb = create(url);
+	  var script = select('head').append('script').attr('type', 'text/javascript').attr('src', url.replace(/(\{|%7B)callback(\}|%7D)/, cb));
+	  return request;
+	}
 
-	        context.history()
-	            .on('change.save', null);
+	var bubbleApi = 'https://dev.virtualearth.net/mapcontrol/HumanScaleServices/GetBubbles.ashx?';
+	var streetsideImagesApi = 'https://t.ssl.ak.tiles.virtualearth.net/tiles/';
+	var bubbleAppKey = 'AuftgJsO0Xs8Ts4M1xZUQJQXJNsvmh3IV8DkNieCiy3tCwCUMq76-WpkrBtNAuEm';
+	var pannellumViewerCSS = 'pannellum-streetside/pannellum.css';
+	var pannellumViewerJS = 'pannellum-streetside/pannellum.js';
+	var maxResults = 2000;
+	var tileZoom = 16.5;
+	var tiler$1 = utilTiler().zoomExtent([tileZoom, tileZoom]).skipNullIsland(true);
+	var dispatch$1 = dispatch$8('loadedImages', 'viewerChanged');
+	var minHfov = 10; // zoom in degrees:  20, 10, 5
 
-	        context
-	            .on('enter.save', null);
+	var maxHfov = 90; // zoom out degrees
 
-	        button = null;
-	        tooltipBehavior = null;
-	    };
+	var defaultHfov = 45;
+	var _hires = false;
+	var _resolution = 512; // higher numbers are slower - 512, 1024, 2048, 4096
 
-	    return tool;
-	}
+	var _currScene = 0;
 
-	function uiToolSidebarToggle(context) {
+	var _ssCache;
 
-	    var tool = {
-	        id: 'sidebar_toggle',
-	        label: _t('toolbar.inspect')
-	    };
+	var _pannellumViewer;
 
-	    tool.render = function(selection) {
-	        selection
-	            .append('button')
-	            .attr('class', 'bar-button')
-	            .on('click', function() {
-	                context.ui().sidebar.toggle();
-	            })
-	            .call(uiTooltip()
-	                .placement('bottom')
-	                .title(_t('sidebar.tooltip'))
-	                .keys([_t('sidebar.key')])
-	                .scrollContainer(context.container().select('.top-toolbar'))
-	            )
-	            .call(svgIcon('#iD-icon-sidebar-' + (_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')));
-	    };
+	var _sceneOptions = {
+	  showFullscreenCtrl: false,
+	  autoLoad: true,
+	  compass: true,
+	  yaw: 0,
+	  minHfov: minHfov,
+	  maxHfov: maxHfov,
+	  hfov: defaultHfov,
+	  type: 'cubemap',
+	  cubeMap: []
+	};
 
-	    return tool;
-	}
+	var _loadViewerPromise;
+	/**
+	 * abortRequest().
+	 */
 
-	function uiToolUndoRedo(context) {
 
-	    var tool = {
-	        id: 'undo_redo',
-	        label: _t('toolbar.undo_redo')
-	    };
+	function abortRequest$1(i) {
+	  i.abort();
+	}
+	/**
+	 * localeTimeStamp().
+	 */
 
-	    var commands = [{
-	        id: 'undo',
-	        cmd: uiCmd('⌘Z'),
-	        action: function() {
-	            context.undo();
-	        },
-	        annotation: function() {
-	            return context.history().undoAnnotation();
-	        },
-	        icon: 'iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')
-	    }, {
-	        id: 'redo',
-	        cmd: uiCmd('⌘⇧Z'),
-	        action: function() {
-	            context.redo();
-	        },
-	        annotation: function() {
-	            return context.history().redoAnnotation();
-	        },
-	        icon: 'iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'undo' : 'redo')
-	    }];
 
+	function localeTimestamp(s) {
+	  if (!s) return null;
+	  var options = {
+	    day: 'numeric',
+	    month: 'short',
+	    year: 'numeric'
+	  };
+	  var d = new Date(s);
+	  if (isNaN(d.getTime())) return null;
+	  return d.toLocaleString(_mainLocalizer.localeCode(), options);
+	}
+	/**
+	 * loadTiles() wraps the process of generating tiles and then fetching image points for each tile.
+	 */
 
-	    function editable() {
-	        return context.mode() && context.mode().id !== 'save' && context.map().editableDataEnabled(true /* ignore min zoom */);
-	    }
 
+	function loadTiles(which, url, projection, margin) {
+	  var tiles = tiler$1.margin(margin).getTiles(projection); // abort inflight requests that are no longer needed
 
-	    tool.render = function(selection) {
-	        var tooltipBehavior = uiTooltip()
-	            .placement('bottom')
-	            .title(function (d) {
-	                return d.annotation() ?
-	                    _t(d.id + '.tooltip', { action: d.annotation() }) :
-	                    _t(d.id + '.nothing');
-	            })
-	            .keys(function(d) {
-	                return [d.cmd];
-	            })
-	            .scrollContainer(context.container().select('.top-toolbar'));
+	  var cache = _ssCache[which];
+	  Object.keys(cache.inflight).forEach(function (k) {
+	    var wanted = tiles.find(function (tile) {
+	      return k.indexOf(tile.id + ',') === 0;
+	    });
 
-	        var lastPointerUpType;
+	    if (!wanted) {
+	      abortRequest$1(cache.inflight[k]);
+	      delete cache.inflight[k];
+	    }
+	  });
+	  tiles.forEach(function (tile) {
+	    return loadNextTilePage(which, url, tile);
+	  });
+	}
+	/**
+	 * loadNextTilePage() load data for the next tile page in line.
+	 */
 
-	        var buttons = selection.selectAll('button')
-	            .data(commands)
-	            .enter()
-	            .append('button')
-	            .attr('class', function(d) { return 'disabled ' + d.id + '-button bar-button'; })
-	            .on('pointerup', function() {
-	                // `pointerup` is always called before `click`
-	                lastPointerUpType = event.pointerType;
-	            })
-	            .on('click', function(d) {
-	                event.preventDefault();
-
-	                var annotation = d.annotation();
-
-	                if (editable() && annotation) {
-	                    d.action();
-	                }
 
-	                if (editable() && (
-	                    lastPointerUpType === 'touch' ||
-	                    lastPointerUpType === 'pen')
-	                ) {
-	                    // there are no tooltips for touch interactions so flash feedback instead
-
-	                    var text = annotation ?
-	                        _t(d.id + '.tooltip', { action: annotation }) :
-	                        _t(d.id + '.nothing');
-	                    context.ui().flash
-	                        .duration(2000)
-	                        .iconName('#' + d.icon)
-	                        .iconClass(annotation ? '' : 'disabled')
-	                        .text(text)();
-	                }
-	                lastPointerUpType = null;
-	            })
-	            .call(tooltipBehavior);
+	function loadNextTilePage(which, url, tile) {
+	  var cache = _ssCache[which];
+	  var nextPage = cache.nextPage[tile.id] || 0;
+	  var id = tile.id + ',' + String(nextPage);
+	  if (cache.loaded[id] || cache.inflight[id]) return;
+	  cache.inflight[id] = getBubbles(url, tile, function (bubbles) {
+	    cache.loaded[id] = true;
+	    delete cache.inflight[id];
+	    if (!bubbles) return; // [].shift() removes the first element, some statistics info, not a bubble point
 
-	        buttons.each(function(d) {
-	            select(this)
-	                .call(svgIcon('#' + d.icon));
-	        });
+	    bubbles.shift();
+	    var features = bubbles.map(function (bubble) {
+	      if (cache.points[bubble.id]) return null; // skip duplicates
 
-	        context.keybinding()
-	            .on(commands[0].cmd, function() {
-	                event.preventDefault();
-	                if (editable()) { commands[0].action(); }
-	            })
-	            .on(commands[1].cmd, function() {
-	                event.preventDefault();
-	                if (editable()) { commands[1].action(); }
-	            });
+	      var loc = [bubble.lo, bubble.la];
+	      var d = {
+	        loc: loc,
+	        key: bubble.id,
+	        ca: bubble.he,
+	        captured_at: bubble.cd,
+	        captured_by: 'microsoft',
+	        // nbn: bubble.nbn,
+	        // pbn: bubble.pbn,
+	        // ad: bubble.ad,
+	        // rn: bubble.rn,
+	        pr: bubble.pr,
+	        // previous
+	        ne: bubble.ne,
+	        // next
+	        pano: true,
+	        sequenceKey: null
+	      };
+	      cache.points[bubble.id] = d; // a sequence starts here
 
+	      if (bubble.pr === undefined) {
+	        cache.leaders.push(bubble.id);
+	      }
 
-	        var debouncedUpdate = debounce(update, 500, { leading: true, trailing: true });
+	      return {
+	        minX: loc[0],
+	        minY: loc[1],
+	        maxX: loc[0],
+	        maxY: loc[1],
+	        data: d
+	      };
+	    }).filter(Boolean);
+	    cache.rtree.load(features);
+	    connectSequences();
 
-	        context.map()
-	            .on('move.undo_redo', debouncedUpdate)
-	            .on('drawn.undo_redo', debouncedUpdate);
+	    if (which === 'bubbles') {
+	      dispatch$1.call('loadedImages');
+	    }
+	  });
+	} // call this sometimes to connect the bubbles into sequences
 
-	        context.history()
-	            .on('change.undo_redo', function(difference) {
-	                if (difference) { update(); }
-	            });
 
-	        context
-	            .on('enter.undo_redo', update);
+	function connectSequences() {
+	  var cache = _ssCache.bubbles;
+	  var keepLeaders = [];
 
+	  for (var i = 0; i < cache.leaders.length; i++) {
+	    var bubble = cache.points[cache.leaders[i]];
+	    var seen = {}; // try to make a sequence.. use the key of the leader bubble.
 
-	        function update() {
-	            buttons
-	                .classed('disabled', function(d) {
-	                    return !editable() || !d.annotation();
-	                })
-	                .each(function() {
-	                    var selection = select(this);
-	                    if (!selection.select('.tooltip.in').empty()) {
-	                        selection.call(tooltipBehavior.updateContent);
-	                    }
-	                });
-	        }
+	    var sequence = {
+	      key: bubble.key,
+	      bubbles: []
 	    };
+	    var complete = false;
 
-	    tool.uninstall = function() {
-	        context.keybinding()
-	            .off(commands[0].cmd)
-	            .off(commands[1].cmd);
+	    do {
+	      sequence.bubbles.push(bubble);
+	      seen[bubble.key] = true;
 
-	        context.map()
-	            .on('move.undo_redo', null)
-	            .on('drawn.undo_redo', null);
+	      if (bubble.ne === undefined) {
+	        complete = true;
+	      } else {
+	        bubble = cache.points[bubble.ne]; // advance to next
+	      }
+	    } while (bubble && !seen[bubble.key] && !complete);
 
-	        context.history()
-	            .on('change.undo_redo', null);
+	    if (complete) {
+	      _ssCache.sequences[sequence.key] = sequence; // assign bubbles to the sequence
 
-	        context
-	            .on('enter.undo_redo', null);
-	    };
+	      for (var j = 0; j < sequence.bubbles.length; j++) {
+	        sequence.bubbles[j].sequenceKey = sequence.key;
+	      } // create a GeoJSON LineString
 
-	    return tool;
-	}
 
-	function uiTopToolbar(context) {
+	      sequence.geojson = {
+	        type: 'LineString',
+	        properties: {
+	          captured_at: sequence.bubbles[0] ? sequence.bubbles[0].captured_at : null,
+	          captured_by: sequence.bubbles[0] ? sequence.bubbles[0].captured_by : null,
+	          key: sequence.key
+	        },
+	        coordinates: sequence.bubbles.map(function (d) {
+	          return d.loc;
+	        })
+	      };
+	    } else {
+	      keepLeaders.push(cache.leaders[i]);
+	    }
+	  } // couldn't complete these, save for later
 
-	    var sidebarToggle = uiToolSidebarToggle(context),
-	        modes = uiToolOldDrawModes(context),
-	        notes = uiToolNotes(context),
-	        undoRedo = uiToolUndoRedo(context),
-	        save = uiToolSave(context);
 
-	    function notesEnabled() {
-	        var noteLayer = context.layers().layer('notes');
-	        return noteLayer && noteLayer.enabled();
-	    }
+	  cache.leaders = keepLeaders;
+	}
+	/**
+	 * getBubbles() handles the request to the server for a tile extent of 'bubbles' (streetside image locations).
+	 */
 
-	    function topToolbar(bar) {
 
-	        bar.on('wheel.topToolbar', function() {
-	            if (!event.deltaX) {
-	                // translate vertical scrolling into horizontal scrolling in case
-	                // the user doesn't have an input device that can scroll horizontally
-	                bar.node().scrollLeft += event.deltaY;
-	            }
-	        });
+	function getBubbles(url, tile, callback) {
+	  var rect = tile.extent.rectangle();
+	  var urlForRequest = url + utilQsString({
+	    n: rect[3],
+	    s: rect[1],
+	    e: rect[2],
+	    w: rect[0],
+	    c: maxResults,
+	    appkey: bubbleAppKey,
+	    jsCallback: '{callback}'
+	  });
+	  return jsonpRequest(urlForRequest, function (data) {
+	    if (!data || data.error) {
+	      callback(null);
+	    } else {
+	      callback(data);
+	    }
+	  });
+	} // partition viewport into higher zoom tiles
 
-	        var debouncedUpdate = debounce(update, 500, { leading: true, trailing: true });
-	        context.layers()
-	            .on('change.topToolbar', debouncedUpdate);
 
-	        update();
+	function partitionViewport(projection) {
+	  var z = geoScaleToZoom(projection.scale());
+	  var z2 = Math.ceil(z * 2) / 2 + 2.5; // round to next 0.5 and add 2.5
 
-	        function update() {
+	  var tiler = utilTiler().zoomExtent([z2, z2]);
+	  return tiler.getTiles(projection).map(function (tile) {
+	    return tile.extent;
+	  });
+	} // no more than `limit` results per partition.
 
-	            var tools = [
-	                sidebarToggle,
-	                'spacer',
-	                modes
-	            ];
 
-	            tools.push('spacer');
+	function searchLimited(limit, projection, rtree) {
+	  limit = limit || 5;
+	  return partitionViewport(projection).reduce(function (result, extent) {
+	    var found = rtree.search(extent.bbox()).slice(0, limit).map(function (d) {
+	      return d.data;
+	    });
+	    return found.length ? result.concat(found) : result;
+	  }, []);
+	}
+	/**
+	 * loadImage()
+	 */
 
-	            if (notesEnabled()) {
-	                tools = tools.concat([notes, 'spacer']);
-	            }
 
-	            tools = tools.concat([undoRedo, save]);
+	function loadImage(imgInfo) {
+	  return new Promise(function (resolve) {
+	    var img = new Image();
 
-	            var toolbarItems = bar.selectAll('.toolbar-item')
-	                .data(tools, function(d) {
-	                    return d.id || d;
-	                });
+	    img.onload = function () {
+	      var canvas = document.getElementById('ideditor-canvas' + imgInfo.face);
+	      var ctx = canvas.getContext('2d');
+	      ctx.drawImage(img, imgInfo.x, imgInfo.y);
+	      resolve({
+	        imgInfo: imgInfo,
+	        status: 'ok'
+	      });
+	    };
 
-	            toolbarItems.exit()
-	                .each(function(d) {
-	                    if (d.uninstall) {
-	                        d.uninstall();
-	                    }
-	                })
-	                .remove();
-
-	            var itemsEnter = toolbarItems
-	                .enter()
-	                .append('div')
-	                .attr('class', function(d) {
-	                    var classes = 'toolbar-item ' + (d.id || d).replace('_', '-');
-	                    if (d.klass) { classes += ' ' + d.klass; }
-	                    return classes;
-	                });
+	    img.onerror = function () {
+	      resolve({
+	        data: imgInfo,
+	        status: 'error'
+	      });
+	    };
 
-	            var actionableItems = itemsEnter.filter(function(d) { return d !== 'spacer'; });
+	    img.setAttribute('crossorigin', '');
+	    img.src = imgInfo.url;
+	  });
+	}
+	/**
+	 * loadCanvas()
+	 */
 
-	            actionableItems
-	                .append('div')
-	                .attr('class', 'item-content')
-	                .each(function(d) {
-	                    select(this).call(d.render, bar);
-	                });
 
-	            actionableItems
-	                .append('div')
-	                .attr('class', 'item-label')
-	                .text(function(d) {
-	                    return d.label;
-	                });
-	        }
+	function loadCanvas(imageGroup) {
+	  return Promise.all(imageGroup.map(loadImage)).then(function (data) {
+	    var canvas = document.getElementById('ideditor-canvas' + data[0].imgInfo.face);
+	    var which = {
+	      '01': 0,
+	      '02': 1,
+	      '03': 2,
+	      '10': 3,
+	      '11': 4,
+	      '12': 5
+	    };
+	    var face = data[0].imgInfo.face;
+	    _sceneOptions.cubeMap[which[face]] = canvas.toDataURL('image/jpeg', 1.0);
+	    return {
+	      status: 'loadCanvas for face ' + data[0].imgInfo.face + 'ok'
+	    };
+	  });
+	}
+	/**
+	 * loadFaces()
+	 */
 
-	    }
 
-	    return topToolbar;
+	function loadFaces(faceGroup) {
+	  return Promise.all(faceGroup.map(loadCanvas)).then(function () {
+	    return {
+	      status: 'loadFaces done'
+	    };
+	  });
 	}
 
-	// these are module variables so they are preserved through a ui.restart()
-	var sawVersion = null;
-	var isNewVersion = false;
-	var isNewUser = false;
+	function setupCanvas(selection, reset) {
+	  if (reset) {
+	    selection.selectAll('#ideditor-stitcher-canvases').remove();
+	  } // Add the Streetside working canvases. These are used for 'stitching', or combining,
+	  // multiple images for each of the six faces, before passing to the Pannellum control as DataUrls
 
 
-	function uiVersion(context) {
+	  selection.selectAll('#ideditor-stitcher-canvases').data([0]).enter().append('div').attr('id', 'ideditor-stitcher-canvases').attr('display', 'none').selectAll('canvas').data(['canvas01', 'canvas02', 'canvas03', 'canvas10', 'canvas11', 'canvas12']).enter().append('canvas').attr('id', function (d) {
+	    return 'ideditor-' + d;
+	  }).attr('width', _resolution).attr('height', _resolution);
+	}
 
-	    var currVersion = context.version;
-	    var matchedVersion = currVersion.match(/\d+\.\d+\.\d+.*/);
+	function qkToXY(qk) {
+	  var x = 0;
+	  var y = 0;
+	  var scale = 256;
 
-	    if (sawVersion === null && matchedVersion !== null) {
-	        if (corePreferences('sawVersion')) {
-	            isNewUser = false;
-	            isNewVersion = corePreferences('sawVersion') !== currVersion && currVersion.indexOf('-') === -1;
-	        } else {
-	            isNewUser = true;
-	            isNewVersion = true;
-	        }
-	        corePreferences('sawVersion', currVersion);
-	        sawVersion = currVersion;
-	    }
-
-	    return function(selection) {
-	        selection
-	            .append('a')
-	            .attr('target', '_blank')
-	            .attr('href', 'https://github.com/openstreetmap/iD')
-	            .text(currVersion);
-
-	        // only show new version indicator to users that have used iD before
-	        if (isNewVersion && !isNewUser) {
-	            selection
-	                .append('div')
-	                .attr('class', 'badge')
-	                .append('a')
-	                .attr('target', '_blank')
-	                .attr('href', 'https://github.com/openstreetmap/iD/blob/release/CHANGELOG.md#whats-new')
-	                .call(svgIcon('#maki-gift-11'))
-	                .call(uiTooltip()
-	                    .title(_t('version.whats_new', { version: currVersion }))
-	                    .placement('top')
-	                );
-	        }
-	    };
+	  for (var i = qk.length; i > 0; i--) {
+	    var key = qk[i - 1];
+	    x += +(key === '1' || key === '3') * scale;
+	    y += +(key === '2' || key === '3') * scale;
+	    scale *= 2;
+	  }
+
+	  return [x, y];
 	}
 
-	function uiZoom(context) {
+	function getQuadKeys() {
+	  var dim = _resolution / 256;
+	  var quadKeys;
 
-	    var zooms = [{
-	        id: 'zoom-in',
-	        icon: 'iD-icon-plus',
-	        title: _t('zoom.in'),
-	        action: zoomIn,
-	        disabled: function() {
-	            return !context.map().canZoomIn();
-	        },
-	        disabledTitle: _t('zoom.disabled.in'),
-	        key: '+'
-	    }, {
-	        id: 'zoom-out',
-	        icon: 'iD-icon-minus',
-	        title: _t('zoom.out'),
-	        action: zoomOut,
-	        disabled: function() {
-	            return !context.map().canZoomOut();
-	        },
-	        disabledTitle: _t('zoom.disabled.out'),
-	        key: '-'
-	    }];
+	  if (dim === 16) {
+	    quadKeys = ['0000', '0001', '0010', '0011', '0100', '0101', '0110', '0111', '1000', '1001', '1010', '1011', '1100', '1101', '1110', '1111', '0002', '0003', '0012', '0013', '0102', '0103', '0112', '0113', '1002', '1003', '1012', '1013', '1102', '1103', '1112', '1113', '0020', '0021', '0030', '0031', '0120', '0121', '0130', '0131', '1020', '1021', '1030', '1031', '1120', '1121', '1130', '1131', '0022', '0023', '0032', '0033', '0122', '0123', '0132', '0133', '1022', '1023', '1032', '1033', '1122', '1123', '1132', '1133', '0200', '0201', '0210', '0211', '0300', '0301', '0310', '0311', '1200', '1201', '1210', '1211', '1300', '1301', '1310', '1311', '0202', '0203', '0212', '0213', '0302', '0303', '0312', '0313', '1202', '1203', '1212', '1213', '1302', '1303', '1312', '1313', '0220', '0221', '0230', '0231', '0320', '0321', '0330', '0331', '1220', '1221', '1230', '1231', '1320', '1321', '1330', '1331', '0222', '0223', '0232', '0233', '0322', '0323', '0332', '0333', '1222', '1223', '1232', '1233', '1322', '1323', '1332', '1333', '2000', '2001', '2010', '2011', '2100', '2101', '2110', '2111', '3000', '3001', '3010', '3011', '3100', '3101', '3110', '3111', '2002', '2003', '2012', '2013', '2102', '2103', '2112', '2113', '3002', '3003', '3012', '3013', '3102', '3103', '3112', '3113', '2020', '2021', '2030', '2031', '2120', '2121', '2130', '2131', '3020', '3021', '3030', '3031', '3120', '3121', '3130', '3131', '2022', '2023', '2032', '2033', '2122', '2123', '2132', '2133', '3022', '3023', '3032', '3033', '3122', '3123', '3132', '3133', '2200', '2201', '2210', '2211', '2300', '2301', '2310', '2311', '3200', '3201', '3210', '3211', '3300', '3301', '3310', '3311', '2202', '2203', '2212', '2213', '2302', '2303', '2312', '2313', '3202', '3203', '3212', '3213', '3302', '3303', '3312', '3313', '2220', '2221', '2230', '2231', '2320', '2321', '2330', '2331', '3220', '3221', '3230', '3231', '3320', '3321', '3330', '3331', '2222', '2223', '2232', '2233', '2322', '2323', '2332', '2333', '3222', '3223', '3232', '3233', '3322', '3323', '3332', '3333'];
+	  } else if (dim === 8) {
+	    quadKeys = ['000', '001', '010', '011', '100', '101', '110', '111', '002', '003', '012', '013', '102', '103', '112', '113', '020', '021', '030', '031', '120', '121', '130', '131', '022', '023', '032', '033', '122', '123', '132', '133', '200', '201', '210', '211', '300', '301', '310', '311', '202', '203', '212', '213', '302', '303', '312', '313', '220', '221', '230', '231', '320', '321', '330', '331', '222', '223', '232', '233', '322', '323', '332', '333'];
+	  } else if (dim === 4) {
+	    quadKeys = ['00', '01', '10', '11', '02', '03', '12', '13', '20', '21', '30', '31', '22', '23', '32', '33'];
+	  } else {
+	    // dim === 2
+	    quadKeys = ['0', '1', '2', '3'];
+	  }
 
-	    function zoomIn() {
-	        event.preventDefault();
-	        context.map().zoomIn();
-	    }
+	  return quadKeys;
+	}
 
-	    function zoomOut() {
-	        event.preventDefault();
-	        context.map().zoomOut();
+	var serviceStreetside = {
+	  /**
+	   * init() initialize streetside.
+	   */
+	  init: function init() {
+	    if (!_ssCache) {
+	      this.reset();
 	    }
 
-	    function zoomInFurther() {
-	        event.preventDefault();
-	        context.map().zoomInFurther();
-	    }
+	    this.event = utilRebind(this, dispatch$1, 'on');
+	  },
 
-	    function zoomOutFurther() {
-	        event.preventDefault();
-	        context.map().zoomOutFurther();
+	  /**
+	   * reset() reset the cache.
+	   */
+	  reset: function reset() {
+	    if (_ssCache) {
+	      Object.values(_ssCache.bubbles.inflight).forEach(abortRequest$1);
 	    }
 
-	    return function(selection) {
-	        var tooltipBehavior = uiTooltip()
-	            .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-	            .title(function(d) {
-	                if (d.disabled()) {
-	                    return d.disabledTitle;
-	                }
-	                return d.title;
-	            })
-	            .keys(function(d) {
-	                return [d.key];
-	            });
-
-	        var lastPointerUpType;
+	    _ssCache = {
+	      bubbles: {
+	        inflight: {},
+	        loaded: {},
+	        nextPage: {},
+	        rtree: new RBush(),
+	        points: {},
+	        leaders: []
+	      },
+	      sequences: {}
+	    };
+	  },
 
-	        var buttons = selection.selectAll('button')
-	            .data(zooms)
-	            .enter()
-	            .append('button')
-	            .attr('class', function(d) { return d.id; })
-	            .on('pointerup.editor', function() {
-	                lastPointerUpType = event.pointerType;
-	            })
-	            .on('click.editor', function(d) {
-	                if (!d.disabled()) {
-	                    d.action();
-	                } else if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
-	                    context.ui().flash
-	                        .duration(2000)
-	                        .iconName('#' + d.icon)
-	                        .iconClass('disabled')
-	                        .text(d.disabledTitle)();
-	                }
-	                lastPointerUpType = null;
-	            })
-	            .call(tooltipBehavior);
+	  /**
+	   * bubbles()
+	   */
+	  bubbles: function bubbles(projection) {
+	    var limit = 5;
+	    return searchLimited(limit, projection, _ssCache.bubbles.rtree);
+	  },
+	  cachedImage: function cachedImage(imageKey) {
+	    return _ssCache.bubbles.points[imageKey];
+	  },
+	  sequences: function sequences(projection) {
+	    var viewport = projection.clipExtent();
+	    var min = [viewport[0][0], viewport[1][1]];
+	    var max = [viewport[1][0], viewport[0][1]];
+	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	    var seen = {};
+	    var results = []; // all sequences for bubbles in viewport
 
-	        buttons.each(function(d) {
-	            select(this)
-	                .call(svgIcon('#' + d.icon, 'light'));
-	        });
+	    _ssCache.bubbles.rtree.search(bbox).forEach(function (d) {
+	      var key = d.data.sequenceKey;
 
-	        ['plus', 'ffplus', '=', 'ffequals'].forEach(function(key) {
-	            context.keybinding().on([key], zoomIn);
-	            context.keybinding().on([uiCmd('⌘' + key)], zoomInFurther);
-	        });
+	      if (key && !seen[key]) {
+	        seen[key] = true;
+	        results.push(_ssCache.sequences[key].geojson);
+	      }
+	    });
 
-	        ['_', '-', 'ffminus', 'dash'].forEach(function(key) {
-	            context.keybinding().on([key], zoomOut);
-	            context.keybinding().on([uiCmd('⌘' + key)], zoomOutFurther);
-	        });
+	    return results;
+	  },
 
-	        function updateButtonStates() {
-	            buttons
-	                .classed('disabled', function(d) {
-	                    return d.disabled();
-	                })
-	                .each(function() {
-	                    var selection = select(this);
-	                    if (!selection.select('.tooltip.in').empty()) {
-	                        selection.call(tooltipBehavior.updateContent);
-	                    }
-	                });
-	        }
+	  /**
+	   * loadBubbles()
+	   */
+	  loadBubbles: function loadBubbles(projection, margin) {
+	    // by default: request 2 nearby tiles so we can connect sequences.
+	    if (margin === undefined) margin = 2;
+	    loadTiles('bubbles', bubbleApi, projection, margin);
+	  },
+	  viewer: function viewer() {
+	    return _pannellumViewer;
+	  },
+	  initViewer: function initViewer() {
+	    if (!window.pannellum) return;
+	    if (_pannellumViewer) return;
+	    _currScene += 1;
 
-	        updateButtonStates();
+	    var sceneID = _currScene.toString();
 
-	        context.map().on('move.uiZoom', updateButtonStates);
+	    var options = {
+	      'default': {
+	        firstScene: sceneID
+	      },
+	      scenes: {}
 	    };
-	}
-
-	function uiZoomToSelection(context) {
+	    options.scenes[sceneID] = _sceneOptions;
+	    _pannellumViewer = window.pannellum.viewer('ideditor-viewer-streetside', options);
+	  },
+	  ensureViewerLoaded: function ensureViewerLoaded(context) {
+	    if (_loadViewerPromise) return _loadViewerPromise; // create ms-wrapper, a photo wrapper class
 
-	    function isDisabled() {
-	        var mode = context.mode();
-	        return !mode || !mode.zoomToSelected;
-	    }
+	    var wrap = context.container().select('.photoviewer').selectAll('.ms-wrapper').data([0]); // inject ms-wrapper into the photoviewer div
+	    // (used by all to house each custom photo viewer)
 
-	    var _lastPointerUpType;
+	    var wrapEnter = wrap.enter().append('div').attr('class', 'photo-wrapper ms-wrapper').classed('hide', true);
+	    var that = this;
+	    var pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // inject div to support streetside viewer (pannellum) and attribution line
 
-	    function pointerup() {
-	        _lastPointerUpType = event.pointerType;
-	    }
+	    wrapEnter.append('div').attr('id', 'ideditor-viewer-streetside').on(pointerPrefix + 'down.streetside', function () {
+	      select(window).on(pointerPrefix + 'move.streetside', function () {
+	        dispatch$1.call('viewerChanged');
+	      }, true);
+	    }).on(pointerPrefix + 'up.streetside pointercancel.streetside', function () {
+	      select(window).on(pointerPrefix + 'move.streetside', null); // continue dispatching events for a few seconds, in case viewer has inertia.
 
-	    function click() {
-	        event.preventDefault();
+	      var t = timer(function (elapsed) {
+	        dispatch$1.call('viewerChanged');
 
-	        if (isDisabled()) {
-	            if (_lastPointerUpType === 'touch' || _lastPointerUpType === 'pen') {
-	                context.ui().flash
-	                    .duration(2000)
-	                    .iconName('#iD-icon-framed-dot')
-	                    .iconClass('disabled')
-	                    .text(_t('inspector.zoom_to.no_selection'))();
-	            }
-	        } else {
-	            var mode = context.mode();
-	            if (mode && mode.zoomToSelected) {
-	                mode.zoomToSelected();
-	            }
+	        if (elapsed > 2000) {
+	          t.stop();
 	        }
+	      });
+	    }).append('div').attr('class', 'photo-attribution fillD');
+	    var controlsEnter = wrapEnter.append('div').attr('class', 'photo-controls-wrap').append('div').attr('class', 'photo-controls');
+	    controlsEnter.append('button').on('click.back', step(-1)).html('◄');
+	    controlsEnter.append('button').on('click.forward', step(1)).html('►'); // create working canvas for stitching together images
 
-	        _lastPointerUpType = null;
-	    }
+	    wrap = wrap.merge(wrapEnter).call(setupCanvas, true); // Register viewer resize handler
 
-	    return function(selection) {
+	    context.ui().photoviewer.on('resize.streetside', function () {
+	      if (_pannellumViewer) {
+	        _pannellumViewer.resize();
+	      }
+	    });
+	    _loadViewerPromise = new Promise(function (resolve, reject) {
+	      var loadedCount = 0;
 
-	        var tooltipBehavior = uiTooltip()
-	            .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-	            .title(function() {
-	                if (isDisabled()) {
-	                    return _t('inspector.zoom_to.no_selection');
-	                }
-	                return _t('inspector.zoom_to.title');
-	            })
-	            .keys([_t('inspector.zoom_to.key')]);
-
-	        var button = selection
-	            .append('button')
-	            .on('pointerup', pointerup)
-	            .on('click', click)
-	            .call(svgIcon('#iD-icon-framed-dot', 'light'))
-	            .call(tooltipBehavior);
-
-	        function setEnabledState() {
-	            button.classed('disabled', isDisabled());
-	            if (!button.select('.tooltip.in').empty()) {
-	                button.call(tooltipBehavior.updateContent);
-	            }
-	        }
+	      function loaded() {
+	        loadedCount += 1; // wait until both files are loaded
 
-	        context.on('enter.uiZoomToSelection', setEnabledState);
+	        if (loadedCount === 2) resolve();
+	      }
 
-	        setEnabledState();
-	    };
-	}
+	      var head = select('head'); // load streetside pannellum viewer css
 
-	function uiPane(id, context) {
+	      head.selectAll('#ideditor-streetside-viewercss').data([0]).enter().append('link').attr('id', 'ideditor-streetside-viewercss').attr('rel', 'stylesheet').attr('crossorigin', 'anonymous').attr('href', context.asset(pannellumViewerCSS)).on('load.serviceStreetside', loaded).on('error.serviceStreetside', function () {
+	        reject();
+	      }); // load streetside pannellum viewer js
 
-	    var _key;
-	    var _title = '';
-	    var _description = '';
-	    var _iconName = '';
-	    var _sections; // array of uiSection objects
+	      head.selectAll('#ideditor-streetside-viewerjs').data([0]).enter().append('script').attr('id', 'ideditor-streetside-viewerjs').attr('crossorigin', 'anonymous').attr('src', context.asset(pannellumViewerJS)).on('load.serviceStreetside', loaded).on('error.serviceStreetside', function () {
+	        reject();
+	      });
+	    })["catch"](function () {
+	      _loadViewerPromise = null;
+	    });
+	    return _loadViewerPromise;
 
-	    var _paneSelection = select(null);
+	    function step(stepBy) {
+	      return function () {
+	        var viewer = context.container().select('.photoviewer');
+	        var selected = viewer.empty() ? undefined : viewer.datum();
+	        if (!selected) return;
+	        var nextID = stepBy === 1 ? selected.ne : selected.pr;
 
-	    var _paneTooltip;
+	        var yaw = _pannellumViewer.getYaw();
 
-	    var pane = {
-	        id: id
-	    };
+	        var ca = selected.ca + yaw;
+	        var origin = selected.loc; // construct a search trapezoid pointing out from current bubble
 
-	    pane.title = function(val) {
-	        if (!arguments.length) { return _title; }
-	        _title = val;
-	        return pane;
-	    };
+	        var meters = 35;
+	        var p1 = [origin[0] + geoMetersToLon(meters / 5, origin[1]), origin[1]];
+	        var p2 = [origin[0] + geoMetersToLon(meters / 2, origin[1]), origin[1] + geoMetersToLat(meters)];
+	        var p3 = [origin[0] - geoMetersToLon(meters / 2, origin[1]), origin[1] + geoMetersToLat(meters)];
+	        var p4 = [origin[0] - geoMetersToLon(meters / 5, origin[1]), origin[1]];
+	        var poly = [p1, p2, p3, p4, p1]; // rotate it to face forward/backward
 
-	    pane.key = function(val) {
-	        if (!arguments.length) { return _key; }
-	        _key = val;
-	        return pane;
-	    };
+	        var angle = (stepBy === 1 ? ca : ca + 180) * (Math.PI / 180);
+	        poly = geoRotate(poly, -angle, origin);
+	        var extent = poly.reduce(function (extent, point) {
+	          return extent.extend(geoExtent(point));
+	        }, geoExtent()); // find nearest other bubble in the search polygon
 
-	    pane.description = function(val) {
-	        if (!arguments.length) { return _description; }
-	        _description = val;
-	        return pane;
-	    };
+	        var minDist = Infinity;
 
-	    pane.iconName = function(val) {
-	        if (!arguments.length) { return _iconName; }
-	        _iconName = val;
-	        return pane;
-	    };
+	        _ssCache.bubbles.rtree.search(extent.bbox()).forEach(function (d) {
+	          if (d.data.key === selected.key) return;
+	          if (!geoPointInPolygon(d.data.loc, poly)) return;
+	          var dist = geoVecLength(d.data.loc, selected.loc);
+	          var theta = selected.ca - d.data.ca;
+	          var minTheta = Math.min(Math.abs(theta), 360 - Math.abs(theta));
 
-	    pane.sections = function(val) {
-	        if (!arguments.length) { return _sections; }
-	        _sections = val;
-	        return pane;
-	    };
+	          if (minTheta > 20) {
+	            dist += 5; // penalize distance if camera angles don't match
+	          }
 
-	    pane.selection = function() {
-	        return _paneSelection;
-	    };
+	          if (dist < minDist) {
+	            nextID = d.data.key;
+	            minDist = dist;
+	          }
+	        });
 
-	    function hidePane() {
-	        context.ui().togglePanes();
+	        var nextBubble = nextID && that.cachedImage(nextID);
+	        if (!nextBubble) return;
+	        context.map().centerEase(nextBubble.loc);
+	        that.selectImage(context, nextBubble.key).yaw(yaw).showViewer(context);
+	      };
 	    }
+	  },
+	  yaw: function yaw(_yaw) {
+	    if (typeof _yaw !== 'number') return _yaw;
+	    _sceneOptions.yaw = _yaw;
+	    return this;
+	  },
 
-	    pane.togglePane = function() {
-	        if (event) { event.preventDefault(); }
-	        _paneTooltip.hide();
-	        context.ui().togglePanes(!_paneSelection.classed('shown') ? _paneSelection : undefined);
-	    };
-
-	    pane.renderToggleButton = function(selection) {
-
-	        if (!_paneTooltip) {
-	            _paneTooltip = uiTooltip()
-	                .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-	                .title(_description)
-	                .keys([_key]);
-	        }
-
-	        selection
-	            .append('button')
-	            .on('click', pane.togglePane)
-	            .call(svgIcon('#' + _iconName, 'light'))
-	            .call(_paneTooltip);
-	    };
-
-	    pane.renderContent = function(selection) {
-	        // override to fully customize content
-
-	        if (_sections) {
-	            _sections.forEach(function(section) {
-	                selection.call(section.render);
-	            });
-	        }
-	    };
-
-	    pane.renderPane = function(selection) {
-
-	        _paneSelection = selection
-	            .append('div')
-	            .attr('class', 'fillL map-pane hide ' + id + '-pane')
-	            .attr('pane', id);
+	  /**
+	   * showViewer()
+	   */
+	  showViewer: function showViewer(context) {
+	    var wrap = context.container().select('.photoviewer').classed('hide', false);
+	    var isHidden = wrap.selectAll('.photo-wrapper.ms-wrapper.hide').size();
 
-	        var heading = _paneSelection
-	            .append('div')
-	            .attr('class', 'pane-heading');
+	    if (isHidden) {
+	      wrap.selectAll('.photo-wrapper:not(.ms-wrapper)').classed('hide', true);
+	      wrap.selectAll('.photo-wrapper.ms-wrapper').classed('hide', false);
+	    }
 
-	        heading
-	            .append('h2')
-	            .text(_title);
+	    return this;
+	  },
 
-	        heading
-	            .append('button')
-	            .on('click', hidePane)
-	            .call(svgIcon('#iD-icon-close'));
+	  /**
+	   * hideViewer()
+	   */
+	  hideViewer: function hideViewer(context) {
+	    var viewer = context.container().select('.photoviewer');
+	    if (!viewer.empty()) viewer.datum(null);
+	    viewer.classed('hide', true).selectAll('.photo-wrapper').classed('hide', true);
+	    context.container().selectAll('.viewfield-group, .sequence, .icon-sign').classed('currentView', false);
+	    this.updateUrlImage(null);
+	    return this.setStyles(context, null, true);
+	  },
 
+	  /**
+	   * selectImage().
+	   */
+	  selectImage: function selectImage(context, key) {
+	    var that = this;
+	    var d = this.cachedImage(key);
+	    var viewer = context.container().select('.photoviewer');
+	    if (!viewer.empty()) viewer.datum(d);
+	    this.setStyles(context, null, true);
+	    var wrap = context.container().select('.photoviewer .ms-wrapper');
+	    var attribution = wrap.selectAll('.photo-attribution').html('');
+	    wrap.selectAll('.pnlm-load-box') // display "loading.."
+	    .style('display', 'block');
+	    if (!d) return this;
+	    this.updateUrlImage(key);
+	    _sceneOptions.northOffset = d.ca;
+	    var line1 = attribution.append('div').attr('class', 'attribution-row');
+	    var hiresDomId = utilUniqueDomId('streetside-hires'); // Add hires checkbox
+
+	    var label = line1.append('label').attr('for', hiresDomId).attr('class', 'streetside-hires');
+	    label.append('input').attr('type', 'checkbox').attr('id', hiresDomId).property('checked', _hires).on('click', function (d3_event) {
+	      d3_event.stopPropagation();
+	      _hires = !_hires;
+	      _resolution = _hires ? 1024 : 512;
+	      wrap.call(setupCanvas, true);
+	      var viewstate = {
+	        yaw: _pannellumViewer.getYaw(),
+	        pitch: _pannellumViewer.getPitch(),
+	        hfov: _pannellumViewer.getHfov()
+	      };
+	      _sceneOptions = Object.assign(_sceneOptions, viewstate);
+	      that.selectImage(context, d.key).showViewer(context);
+	    });
+	    label.append('span').html(_t.html('streetside.hires'));
+	    var captureInfo = line1.append('div').attr('class', 'attribution-capture-info'); // Add capture date
 
-	        _paneSelection
-	            .append('div')
-	            .attr('class', 'pane-content')
-	            .call(pane.renderContent);
+	    if (d.captured_by) {
+	      var yyyy = new Date().getFullYear();
+	      captureInfo.append('a').attr('class', 'captured_by').attr('target', '_blank').attr('href', 'https://www.microsoft.com/en-us/maps/streetside').html('©' + yyyy + ' Microsoft');
+	      captureInfo.append('span').html('|');
+	    }
 
-	        if (_key) {
-	            context.keybinding()
-	                .on(_key, pane.togglePane);
-	        }
-	    };
+	    if (d.captured_at) {
+	      captureInfo.append('span').attr('class', 'captured_at').html(localeTimestamp(d.captured_at));
+	    } // Add image links
 
-	    return pane;
-	}
 
-	function uiSectionBackgroundDisplayOptions(context) {
+	    var line2 = attribution.append('div').attr('class', 'attribution-row');
+	    line2.append('a').attr('class', 'image-view-link').attr('target', '_blank').attr('href', 'https://www.bing.com/maps?cp=' + d.loc[1] + '~' + d.loc[0] + '&lvl=17&dir=' + d.ca + '&style=x&v=2&sV=1').html(_t.html('streetside.view_on_bing'));
+	    line2.append('a').attr('class', 'image-report-link').attr('target', '_blank').attr('href', 'https://www.bing.com/maps/privacyreport/streetsideprivacyreport?bubbleid=' + encodeURIComponent(d.key) + '&focus=photo&lat=' + d.loc[1] + '&lng=' + d.loc[0] + '&z=17').html(_t.html('streetside.report'));
+	    var bubbleIdQuadKey = d.key.toString(4);
+	    var paddingNeeded = 16 - bubbleIdQuadKey.length;
 
-	    var section = uiSection('background-display-options', context)
-	        .title(_t('background.display_options'))
-	        .disclosureContent(renderDisclosureContent);
+	    for (var i = 0; i < paddingNeeded; i++) {
+	      bubbleIdQuadKey = '0' + bubbleIdQuadKey;
+	    }
 
-	    var _detected = utilDetect();
-	    var _storedOpacity = corePreferences('background-opacity');
-	    var _minVal = 0.25;
-	    var _maxVal = _detected.cssfilters ? 2 : 1;
+	    var imgUrlPrefix = streetsideImagesApi + 'hs' + bubbleIdQuadKey;
+	    var imgUrlSuffix = '.jpg?g=6338&n=z'; // Cubemap face code order matters here: front=01, right=02, back=03, left=10, up=11, down=12
 
-	    var _sliders = _detected.cssfilters
-	        ? ['brightness', 'contrast', 'saturation', 'sharpness']
-	        : ['brightness'];
+	    var faceKeys = ['01', '02', '03', '10', '11', '12']; // Map images to cube faces
 
-	    var _options = {
-	        brightness: (_storedOpacity !== null ? (+_storedOpacity) : 1),
-	        contrast: 1,
-	        saturation: 1,
-	        sharpness: 1
-	    };
+	    var quadKeys = getQuadKeys();
+	    var faces = faceKeys.map(function (faceKey) {
+	      return quadKeys.map(function (quadKey) {
+	        var xy = qkToXY(quadKey);
+	        return {
+	          face: faceKey,
+	          url: imgUrlPrefix + faceKey + quadKey + imgUrlSuffix,
+	          x: xy[0],
+	          y: xy[1]
+	        };
+	      });
+	    });
+	    loadFaces(faces).then(function () {
+	      if (!_pannellumViewer) {
+	        that.initViewer();
+	      } else {
+	        // make a new scene
+	        _currScene += 1;
 
-	    function clamp(x, min, max) {
-	        return Math.max(min, Math.min(x, max));
-	    }
+	        var sceneID = _currScene.toString();
 
-	    function updateValue(d, val) {
-	        if (!val && event && event.target) {
-	            val = event.target.value;
-	        }
+	        _pannellumViewer.addScene(sceneID, _sceneOptions).loadScene(sceneID); // remove previous scene
 
-	        val = clamp(val, _minVal, _maxVal);
 
-	        _options[d] = val;
-	        context.background()[d](val);
+	        if (_currScene > 2) {
+	          sceneID = (_currScene - 1).toString();
 
-	        if (d === 'brightness') {
-	            corePreferences('background-opacity', val);
+	          _pannellumViewer.removeScene(sceneID);
 	        }
-
-	        section.reRender();
+	      }
+	    });
+	    return this;
+	  },
+	  getSequenceKeyForBubble: function getSequenceKeyForBubble(d) {
+	    return d && d.sequenceKey;
+	  },
+	  // Updates the currently highlighted sequence and selected bubble.
+	  // Reset is only necessary when interacting with the viewport because
+	  // this implicitly changes the currently selected bubble/sequence
+	  setStyles: function setStyles(context, hovered, reset) {
+	    if (reset) {
+	      // reset all layers
+	      context.container().selectAll('.viewfield-group').classed('highlighted', false).classed('hovered', false).classed('currentView', false);
+	      context.container().selectAll('.sequence').classed('highlighted', false).classed('currentView', false);
 	    }
 
-	    function renderDisclosureContent(selection) {
-	        var container = selection.selectAll('.display-options-container')
-	            .data([0]);
-
-	        var containerEnter = container.enter()
-	            .append('div')
-	            .attr('class', 'display-options-container controls-list');
+	    var hoveredBubbleKey = hovered && hovered.key;
+	    var hoveredSequenceKey = this.getSequenceKeyForBubble(hovered);
+	    var hoveredSequence = hoveredSequenceKey && _ssCache.sequences[hoveredSequenceKey];
+	    var hoveredBubbleKeys = hoveredSequence && hoveredSequence.bubbles.map(function (d) {
+	      return d.key;
+	    }) || [];
+	    var viewer = context.container().select('.photoviewer');
+	    var selected = viewer.empty() ? undefined : viewer.datum();
+	    var selectedBubbleKey = selected && selected.key;
+	    var selectedSequenceKey = this.getSequenceKeyForBubble(selected);
+	    var selectedSequence = selectedSequenceKey && _ssCache.sequences[selectedSequenceKey];
+	    var selectedBubbleKeys = selectedSequence && selectedSequence.bubbles.map(function (d) {
+	      return d.key;
+	    }) || []; // highlight sibling viewfields on either the selected or the hovered sequences
 
-	        // add slider controls
-	        var slidersEnter = containerEnter.selectAll('.display-control')
-	            .data(_sliders)
-	            .enter()
-	            .append('div')
-	            .attr('class', function(d) { return 'display-control display-control-' + d; });
-
-	        slidersEnter
-	            .append('h5')
-	            .text(function(d) { return _t('background.' + d); })
-	            .append('span')
-	            .attr('class', function(d) { return 'display-option-value display-option-value-' + d; });
-
-	        slidersEnter
-	            .append('input')
-	            .attr('class', function(d) { return 'display-option-input display-option-input-' + d; })
-	            .attr('type', 'range')
-	            .attr('min', _minVal)
-	            .attr('max', _maxVal)
-	            .attr('step', '0.05')
-	            .on('input', function(d) {
-	                var val = select(this).property('value');
-	                updateValue(d, val);
-	            });
+	    var highlightedBubbleKeys = utilArrayUnion(hoveredBubbleKeys, selectedBubbleKeys);
+	    context.container().selectAll('.layer-streetside-images .viewfield-group').classed('highlighted', function (d) {
+	      return highlightedBubbleKeys.indexOf(d.key) !== -1;
+	    }).classed('hovered', function (d) {
+	      return d.key === hoveredBubbleKey;
+	    }).classed('currentView', function (d) {
+	      return d.key === selectedBubbleKey;
+	    });
+	    context.container().selectAll('.layer-streetside-images .sequence').classed('highlighted', function (d) {
+	      return d.properties.key === hoveredSequenceKey;
+	    }).classed('currentView', function (d) {
+	      return d.properties.key === selectedSequenceKey;
+	    }); // update viewfields if needed
 
-	        slidersEnter
-	            .append('button')
-	            .attr('title', _t('background.reset'))
-	            .attr('class', function(d) { return 'display-option-reset display-option-reset-' + d; })
-	            .on('click', function(d) {
-	                if (event.button !== 0) { return; }
-	                updateValue(d, 1);
-	            })
-	            .call(svgIcon('#iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')));
-
-	        // reset all button
-	        containerEnter
-	            .append('a')
-	            .attr('class', 'display-option-resetlink')
-	            .attr('href', '#')
-	            .text(_t('background.reset_all'))
-	            .on('click', function() {
-	                for (var i = 0; i < _sliders.length; i++) {
-	                    updateValue(_sliders[i],1);
-	                }
-	            });
+	    context.container().selectAll('.layer-streetside-images .viewfield-group .viewfield').attr('d', viewfieldPath);
 
-	        // update
-	        container = containerEnter
-	            .merge(container);
+	    function viewfieldPath() {
+	      var d = this.parentNode.__data__;
 
-	        container.selectAll('.display-option-input')
-	            .property('value', function(d) { return _options[d]; });
+	      if (d.pano && d.key !== selectedBubbleKey) {
+	        return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+	      } else {
+	        return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+	      }
+	    }
 
-	        container.selectAll('.display-option-value')
-	            .text(function(d) { return Math.floor(_options[d] * 100) + '%'; });
+	    return this;
+	  },
+	  updateUrlImage: function updateUrlImage(imageKey) {
+	    if (!window.mocha) {
+	      var hash = utilStringQs(window.location.hash);
 
-	        container.selectAll('.display-option-reset')
-	            .classed('disabled', function(d) { return _options[d] === 1; });
+	      if (imageKey) {
+	        hash.photo = 'streetside/' + imageKey;
+	      } else {
+	        delete hash.photo;
+	      }
 
-	        // first time only, set brightness if needed
-	        if (containerEnter.size() && _options.brightness !== 1) {
-	            context.background().brightness(_options.brightness);
-	        }
+	      window.location.replace('#' + utilQsString(hash, true));
 	    }
+	  },
 
-	    return section;
-	}
+	  /**
+	   * cache().
+	   */
+	  cache: function cache() {
+	    return _ssCache;
+	  }
+	};
 
-	function uiSettingsCustomBackground() {
-	    var dispatch$1 = dispatch('change');
+	var _apibase = 'https://taginfo.openstreetmap.org/api/4/';
+	var _inflight = {};
+	var _popularKeys = {};
+	var _taginfoCache = {};
+	var tag_sorts = {
+	  point: 'count_nodes',
+	  vertex: 'count_nodes',
+	  area: 'count_ways',
+	  line: 'count_ways'
+	};
+	var tag_sort_members = {
+	  point: 'count_node_members',
+	  vertex: 'count_node_members',
+	  area: 'count_way_members',
+	  line: 'count_way_members',
+	  relation: 'count_relation_members'
+	};
+	var tag_filters = {
+	  point: 'nodes',
+	  vertex: 'nodes',
+	  area: 'ways',
+	  line: 'ways'
+	};
+	var tag_members_fractions = {
+	  point: 'count_node_members_fraction',
+	  vertex: 'count_node_members_fraction',
+	  area: 'count_way_members_fraction',
+	  line: 'count_way_members_fraction',
+	  relation: 'count_relation_members_fraction'
+	};
 
-	    function render(selection) {
-	        // keep separate copies of original and current settings
-	        var _origSettings = {
-	            template: corePreferences('background-custom-template')
-	        };
-	        var _currSettings = {
-	            template: corePreferences('background-custom-template')
-	        };
+	function sets(params, n, o) {
+	  if (params.geometry && o[params.geometry]) {
+	    params[n] = o[params.geometry];
+	  }
 
-	        var example = 'https://{switch:a,b,c}.tile.openstreetmap.org/{zoom}/{x}/{y}.png';
-	        var modal = uiConfirm(selection).okButton();
-
-	        modal
-	            .classed('settings-modal settings-custom-background', true);
-
-	        modal.select('.modal-section.header')
-	            .append('h3')
-	            .text(_t('settings.custom_background.header'));
-
-
-	        var textSection = modal.select('.modal-section.message-text');
-
-	        var instructions =
-	            (_t('settings.custom_background.instructions.info')) + "\n" +
-	            '\n' +
-	            "#### " + (_t('settings.custom_background.instructions.wms.tokens_label')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.wms.tokens.proj')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.wms.tokens.wkid')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.wms.tokens.dimensions')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.wms.tokens.bbox')) + "\n" +
-	            '\n' +
-	            "#### " + (_t('settings.custom_background.instructions.tms.tokens_label')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.tms.tokens.xyz')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.tms.tokens.flipped_y')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.tms.tokens.switch')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.tms.tokens.quadtile')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.tms.tokens.scale_factor')) + "\n" +
-	            '\n' +
-	            "#### " + (_t('settings.custom_background.instructions.example')) + "\n" +
-	            "`" + example + "`";
-
-	        textSection
-	            .append('div')
-	            .attr('class', 'instructions-template')
-	            .html(marked_1(instructions));
+	  return params;
+	}
 
-	        textSection
-	            .append('textarea')
-	            .attr('class', 'field-template')
-	            .attr('placeholder', _t('settings.custom_background.template.placeholder'))
-	            .call(utilNoAuto)
-	            .property('value', _currSettings.template);
+	function setFilter(params) {
+	  return sets(params, 'filter', tag_filters);
+	}
 
+	function setSort(params) {
+	  return sets(params, 'sortname', tag_sorts);
+	}
 
-	        // insert a cancel button
-	        var buttonSection = modal.select('.modal-section.buttons');
+	function setSortMembers(params) {
+	  return sets(params, 'sortname', tag_sort_members);
+	}
 
-	        buttonSection
-	            .insert('button', '.ok-button')
-	            .attr('class', 'button cancel-button secondary-action')
-	            .text(_t('confirm.cancel'));
+	function clean(params) {
+	  return utilObjectOmit(params, ['geometry', 'debounce']);
+	}
 
+	function filterKeys(type) {
+	  var count_type = type ? 'count_' + type : 'count_all';
+	  return function (d) {
+	    return parseFloat(d[count_type]) > 2500 || d.in_wiki;
+	  };
+	}
 
-	        buttonSection.select('.cancel-button')
-	            .on('click.cancel', clickCancel);
+	function filterMultikeys(prefix) {
+	  return function (d) {
+	    // d.key begins with prefix, and d.key contains no additional ':'s
+	    var re = new RegExp('^' + prefix + '(.*)$');
+	    var matches = d.key.match(re) || [];
+	    return matches.length === 2 && matches[1].indexOf(':') === -1;
+	  };
+	}
 
-	        buttonSection.select('.ok-button')
-	            .attr('disabled', isSaveDisabled)
-	            .on('click.save', clickSave);
+	function filterValues(allowUpperCase) {
+	  return function (d) {
+	    if (d.value.match(/[;,]/) !== null) return false; // exclude some punctuation
 
+	    if (!allowUpperCase && d.value.match(/[A-Z*]/) !== null) return false; // exclude uppercase letters
 
-	        function isSaveDisabled() {
-	            return null;
-	        }
+	    return parseFloat(d.fraction) > 0.0;
+	  };
+	}
 
+	function filterRoles(geometry) {
+	  return function (d) {
+	    if (d.role === '') return false; // exclude empty role
 
-	        // restore the original template
-	        function clickCancel() {
-	            textSection.select('.field-template').property('value', _origSettings.template);
-	            corePreferences('background-custom-template', _origSettings.template);
-	            this.blur();
-	            modal.close();
-	        }
+	    if (d.role.match(/[A-Z*;,]/) !== null) return false; // exclude uppercase letters and some punctuation
 
-	        // accept the current template
-	        function clickSave() {
-	            _currSettings.template = textSection.select('.field-template').property('value');
-	            corePreferences('background-custom-template', _currSettings.template);
-	            this.blur();
-	            modal.close();
-	            dispatch$1.call('change', this, _currSettings);
-	        }
-	    }
+	    return parseFloat(d[tag_members_fractions[geometry]]) > 0.0;
+	  };
+	}
 
-	    return utilRebind(render, dispatch$1, 'on');
+	function valKey(d) {
+	  return {
+	    value: d.key,
+	    title: d.key
+	  };
 	}
 
-	function uiSectionBackgroundList(context) {
+	function valKeyDescription(d) {
+	  var obj = {
+	    value: d.value,
+	    title: d.description || d.value
+	  };
 
-	    var _backgroundList = select(null);
+	  if (d.count) {
+	    obj.count = d.count;
+	  }
 
-	    var _customSource = context.background().findSource('custom');
+	  return obj;
+	}
 
-	    var _settingsCustomBackground = uiSettingsCustomBackground()
-	        .on('change', customChanged);
+	function roleKey(d) {
+	  return {
+	    value: d.role,
+	    title: d.role
+	  };
+	} // sort keys with ':' lower than keys without ':'
 
-	    var section = uiSection('background-list', context)
-	        .title(_t('background.backgrounds'))
-	        .disclosureContent(renderDisclosureContent);
 
-	    function previousBackgroundID() {
-	        return corePreferences('background-last-used-toggle');
-	    }
+	function sortKeys(a, b) {
+	  return a.key.indexOf(':') === -1 && b.key.indexOf(':') !== -1 ? -1 : a.key.indexOf(':') !== -1 && b.key.indexOf(':') === -1 ? 1 : 0;
+	}
 
-	    function renderDisclosureContent(selection) {
+	var debouncedRequest = debounce(request, 300, {
+	  leading: false
+	});
 
-	        // the background list
-	        var container = selection.selectAll('.layer-background-list')
-	            .data([0]);
+	function request(url, params, exactMatch, callback, loaded) {
+	  if (_inflight[url]) return;
+	  if (checkCache(url, params, exactMatch, callback)) return;
+	  var controller = new AbortController();
+	  _inflight[url] = controller;
+	  d3_json(url, {
+	    signal: controller.signal
+	  }).then(function (result) {
+	    delete _inflight[url];
+	    if (loaded) loaded(null, result);
+	  })["catch"](function (err) {
+	    delete _inflight[url];
+	    if (err.name === 'AbortError') return;
+	    if (loaded) loaded(err.message);
+	  });
+	}
 
-	        _backgroundList = container.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-background-list')
-	            .attr('dir', 'auto')
-	            .merge(container);
+	function checkCache(url, params, exactMatch, callback) {
+	  var rp = params.rp || 25;
+	  var testQuery = params.query || '';
+	  var testUrl = url;
 
+	  do {
+	    var hit = _taginfoCache[testUrl]; // exact match, or shorter match yielding fewer than max results (rp)
 
-	        // add minimap toggle below list
-	        var bgExtrasListEnter = selection.selectAll('.bg-extras-list')
-	            .data([0])
-	            .enter()
-	            .append('ul')
-	            .attr('class', 'layer-list bg-extras-list');
-
-	        var minimapLabelEnter = bgExtrasListEnter
-	            .append('li')
-	            .attr('class', 'minimap-toggle-item')
-	            .append('label')
-	            .call(uiTooltip()
-	                .title(_t('background.minimap.tooltip'))
-	                .keys([_t('background.minimap.key')])
-	                .placement('top')
-	            );
-
-	        minimapLabelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function() {
-	                event.preventDefault();
-	                uiMapInMap.toggle();
-	            });
+	    if (hit && (url === testUrl || hit.length < rp)) {
+	      callback(null, hit);
+	      return true;
+	    } // don't try to shorten the query
 
-	        minimapLabelEnter
-	            .append('span')
-	            .text(_t('background.minimap.description'));
-
-
-	        var panelLabelEnter = bgExtrasListEnter
-	            .append('li')
-	            .attr('class', 'background-panel-toggle-item')
-	            .append('label')
-	            .call(uiTooltip()
-	                .title(_t('background.panel.tooltip'))
-	                .keys([uiCmd('⌘⇧' + _t('info_panels.background.key'))])
-	                .placement('top')
-	            );
-
-	        panelLabelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function() {
-	                event.preventDefault();
-	                context.ui().info.toggle('background');
-	            });
 
-	        panelLabelEnter
-	            .append('span')
-	            .text(_t('background.panel.description'));
-
-	        var locPanelLabelEnter = bgExtrasListEnter
-	            .append('li')
-	            .attr('class', 'location-panel-toggle-item')
-	            .append('label')
-	            .call(uiTooltip()
-	                .title(_t('background.location_panel.tooltip'))
-	                .keys([uiCmd('⌘⇧' + _t('info_panels.location.key'))])
-	                .placement('top')
-	            );
-
-	        locPanelLabelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function() {
-	                event.preventDefault();
-	                context.ui().info.toggle('location');
-	            });
+	    if (exactMatch || !testQuery.length) return false; // do shorten the query to see if we already have a cached result
+	    // that has returned fewer than max results (rp)
 
-	        locPanelLabelEnter
-	            .append('span')
-	            .text(_t('background.location_panel.description'));
+	    testQuery = testQuery.slice(0, -1);
+	    testUrl = url.replace(/&query=(.*?)&/, '&query=' + testQuery + '&');
+	  } while (testQuery.length >= 0);
 
+	  return false;
+	}
 
-	        // "Info / Report a Problem" link
-	        selection.selectAll('.imagery-faq')
-	            .data([0])
-	            .enter()
-	            .append('div')
-	            .attr('class', 'imagery-faq')
-	            .append('a')
-	            .attr('target', '_blank')
-	            .call(svgIcon('#iD-icon-out-link', 'inline'))
-	            .attr('href', 'https://github.com/openstreetmap/iD/blob/develop/FAQ.md#how-can-i-report-an-issue-with-background-imagery')
-	            .append('span')
-	            .text(_t('background.imagery_problem_faq'));
-
-	        _backgroundList
-	            .call(drawListItems, 'radio', chooseBackground, function(d) { return !d.isHidden() && !d.overlay; });
-	    }
-
-	    function setTooltips(selection) {
-	        selection.each(function(d, i, nodes) {
-	            var item = select(this).select('label');
-	            var span = item.select('span');
-	            var placement = (i < nodes.length / 2) ? 'bottom' : 'top';
-	            var description = d.description();
-	            var isOverflowing = (span.property('clientWidth') !== span.property('scrollWidth'));
-
-	            item.call(uiTooltip().destroyAny);
-
-	            if (d.id === previousBackgroundID()) {
-	                item.call(uiTooltip()
-	                    .placement(placement)
-	                    .title('<div>' + _t('background.switch') + '</div>')
-	                    .keys([uiCmd('⌘' + _t('background.key'))])
-	                );
-	            } else if (description || isOverflowing) {
-	                item.call(uiTooltip()
-	                    .placement(placement)
-	                    .title(description || d.name())
-	                );
-	            }
-	        });
-	    }
+	var serviceTaginfo = {
+	  init: function init() {
+	    _inflight = {};
+	    _taginfoCache = {};
+	    _popularKeys = {
+	      // manually exclude some keys – #5377, #7485
+	      postal_code: true,
+	      full_name: true,
+	      loc_name: true,
+	      reg_name: true,
+	      short_name: true,
+	      sorting_name: true,
+	      artist_name: true,
+	      nat_name: true,
+	      long_name: true,
+	      'bridge:name': true
+	    }; // Fetch popular keys.  We'll exclude these from `values`
+	    // lookups because they stress taginfo, and they aren't likely
+	    // to yield meaningful autocomplete results.. see #3955
 
-	    function drawListItems(layerList, type, change, filter) {
-	        var sources = context.background()
-	            .sources(context.map().extent(), context.map().zoom(), true)
-	            .filter(filter);
+	    var params = {
+	      rp: 100,
+	      sortname: 'values_all',
+	      sortorder: 'desc',
+	      page: 1,
+	      debounce: false,
+	      lang: _mainLocalizer.languageCode()
+	    };
+	    this.keys(params, function (err, data) {
+	      if (err) return;
+	      data.forEach(function (d) {
+	        if (d.value === 'opening_hours') return; // exception
+
+	        _popularKeys[d.value] = true;
+	      });
+	    });
+	  },
+	  reset: function reset() {
+	    Object.values(_inflight).forEach(function (controller) {
+	      controller.abort();
+	    });
+	    _inflight = {};
+	  },
+	  keys: function keys(params, callback) {
+	    var doRequest = params.debounce ? debouncedRequest : request;
+	    params = clean(setSort(params));
+	    params = Object.assign({
+	      rp: 10,
+	      sortname: 'count_all',
+	      sortorder: 'desc',
+	      page: 1,
+	      lang: _mainLocalizer.languageCode()
+	    }, params);
+	    var url = _apibase + 'keys/all?' + utilQsString(params);
+	    doRequest(url, params, false, callback, function (err, d) {
+	      if (err) {
+	        callback(err);
+	      } else {
+	        var f = filterKeys(params.filter);
+	        var result = d.data.filter(f).sort(sortKeys).map(valKey);
+	        _taginfoCache[url] = result;
+	        callback(null, result);
+	      }
+	    });
+	  },
+	  multikeys: function multikeys(params, callback) {
+	    var doRequest = params.debounce ? debouncedRequest : request;
+	    params = clean(setSort(params));
+	    params = Object.assign({
+	      rp: 25,
+	      sortname: 'count_all',
+	      sortorder: 'desc',
+	      page: 1,
+	      lang: _mainLocalizer.languageCode()
+	    }, params);
+	    var prefix = params.query;
+	    var url = _apibase + 'keys/all?' + utilQsString(params);
+	    doRequest(url, params, true, callback, function (err, d) {
+	      if (err) {
+	        callback(err);
+	      } else {
+	        var f = filterMultikeys(prefix);
+	        var result = d.data.filter(f).map(valKey);
+	        _taginfoCache[url] = result;
+	        callback(null, result);
+	      }
+	    });
+	  },
+	  values: function values(params, callback) {
+	    // Exclude popular keys from values lookups.. see #3955
+	    var key = params.key;
 
-	        var layerLinks = layerList.selectAll('li')
-	            .data(sources, function(d) { return d.name(); });
+	    if (key && _popularKeys[key]) {
+	      callback(null, []);
+	      return;
+	    }
 
-	        layerLinks.exit()
-	            .remove();
+	    var doRequest = params.debounce ? debouncedRequest : request;
+	    params = clean(setSort(setFilter(params)));
+	    params = Object.assign({
+	      rp: 25,
+	      sortname: 'count_all',
+	      sortorder: 'desc',
+	      page: 1,
+	      lang: _mainLocalizer.languageCode()
+	    }, params);
+	    var url = _apibase + 'key/values?' + utilQsString(params);
+	    doRequest(url, params, false, callback, function (err, d) {
+	      if (err) {
+	        callback(err);
+	      } else {
+	        // In most cases we prefer taginfo value results with lowercase letters.
+	        // A few OSM keys expect values to contain uppercase values (see #3377).
+	        // This is not an exhaustive list (e.g. `name` also has uppercase values)
+	        // but these are the fields where taginfo value lookup is most useful.
+	        var re = /network|taxon|genus|species|brand|grape_variety|royal_cypher|listed_status|booth|rating|stars|:output|_hours|_times|_ref|manufacturer|country|target|brewery/;
+	        var allowUpperCase = re.test(params.key);
+	        var f = filterValues(allowUpperCase);
+	        var result = d.data.filter(f).map(valKeyDescription);
+	        _taginfoCache[url] = result;
+	        callback(null, result);
+	      }
+	    });
+	  },
+	  roles: function roles(params, callback) {
+	    var doRequest = params.debounce ? debouncedRequest : request;
+	    var geometry = params.geometry;
+	    params = clean(setSortMembers(params));
+	    params = Object.assign({
+	      rp: 25,
+	      sortname: 'count_all_members',
+	      sortorder: 'desc',
+	      page: 1,
+	      lang: _mainLocalizer.languageCode()
+	    }, params);
+	    var url = _apibase + 'relation/roles?' + utilQsString(params);
+	    doRequest(url, params, true, callback, function (err, d) {
+	      if (err) {
+	        callback(err);
+	      } else {
+	        var f = filterRoles(geometry);
+	        var result = d.data.filter(f).map(roleKey);
+	        _taginfoCache[url] = result;
+	        callback(null, result);
+	      }
+	    });
+	  },
+	  docs: function docs(params, callback) {
+	    var doRequest = params.debounce ? debouncedRequest : request;
+	    params = clean(setSort(params));
+	    var path = 'key/wiki_pages?';
 
-	        var enter = layerLinks.enter()
-	            .append('li')
-	            .classed('layer-custom', function(d) { return d.id === 'custom'; })
-	            .classed('best', function(d) { return d.best(); });
+	    if (params.value) {
+	      path = 'tag/wiki_pages?';
+	    } else if (params.rtype) {
+	      path = 'relation/wiki_pages?';
+	    }
 
-	        var label = enter
-	            .append('label');
+	    var url = _apibase + path + utilQsString(params);
+	    doRequest(url, params, true, callback, function (err, d) {
+	      if (err) {
+	        callback(err);
+	      } else {
+	        _taginfoCache[url] = d.data;
+	        callback(null, d.data);
+	      }
+	    });
+	  },
+	  apibase: function apibase(_) {
+	    if (!arguments.length) return _apibase;
+	    _apibase = _;
+	    return this;
+	  }
+	};
 
-	        label
-	            .append('input')
-	            .attr('type', type)
-	            .attr('name', 'layers')
-	            .on('change', change);
+	/**
+	 * Wraps a GeoJSON {@link Geometry} in a GeoJSON {@link Feature}.
+	 *
+	 * @name feature
+	 * @param {Geometry} geometry input geometry
+	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+	 * @param {Object} [options={}] Optional Parameters
+	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+	 * @param {string|number} [options.id] Identifier associated with the Feature
+	 * @returns {Feature} a GeoJSON Feature
+	 * @example
+	 * var geometry = {
+	 *   "type": "Point",
+	 *   "coordinates": [110, 50]
+	 * };
+	 *
+	 * var feature = turf.feature(geometry);
+	 *
+	 * //=feature
+	 */
 
-	        label
-	            .append('span')
-	            .text(function(d) { return d.name(); });
+	function feature(geom, properties, options) {
+	  if (options === void 0) {
+	    options = {};
+	  }
 
-	        enter.filter(function(d) { return d.id === 'custom'; })
-	            .append('button')
-	            .attr('class', 'layer-browse')
-	            .call(uiTooltip()
-	                .title(_t('settings.custom_background.tooltip'))
-	                .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-	            )
-	            .on('click', editCustom)
-	            .call(svgIcon('#iD-icon-more'));
+	  var feat = {
+	    type: "Feature"
+	  };
 
-	        enter.filter(function(d) { return d.best(); })
-	            .append('div')
-	            .attr('class', 'best')
-	            .call(uiTooltip()
-	                .title(_t('background.best_imagery'))
-	                .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-	            )
-	            .append('span')
-	            .html('&#9733;');
+	  if (options.id === 0 || options.id) {
+	    feat.id = options.id;
+	  }
 
+	  if (options.bbox) {
+	    feat.bbox = options.bbox;
+	  }
 
-	        layerList.selectAll('li')
-	            .sort(sortSources);
+	  feat.properties = properties || {};
+	  feat.geometry = geom;
+	  return feat;
+	}
+	/**
+	 * Creates a {@link Polygon} {@link Feature} from an Array of LinearRings.
+	 *
+	 * @name polygon
+	 * @param {Array<Array<Array<number>>>} coordinates an array of LinearRings
+	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+	 * @param {Object} [options={}] Optional Parameters
+	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+	 * @param {string|number} [options.id] Identifier associated with the Feature
+	 * @returns {Feature<Polygon>} Polygon Feature
+	 * @example
+	 * var polygon = turf.polygon([[[-5, 52], [-4, 56], [-2, 51], [-7, 54], [-5, 52]]], { name: 'poly1' });
+	 *
+	 * //=polygon
+	 */
 
-	        layerList
-	            .call(updateLayerSelections);
+	function polygon(coordinates, properties, options) {
+	  if (options === void 0) {
+	    options = {};
+	  }
 
+	  for (var _i = 0, coordinates_1 = coordinates; _i < coordinates_1.length; _i++) {
+	    var ring = coordinates_1[_i];
 
-	        function sortSources(a, b) {
-	            return a.best() && !b.best() ? -1
-	                : b.best() && !a.best() ? 1
-	                : d3_descending(a.area(), b.area()) || d3_ascending(a.name(), b.name()) || 0;
-	        }
+	    if (ring.length < 4) {
+	      throw new Error("Each LinearRing of a Polygon must have 4 or more Positions.");
 	    }
 
-	    function updateLayerSelections(selection) {
-	        function active(d) {
-	            return context.background().showsLayer(d);
-	        }
-
-	        selection.selectAll('li')
-	            .classed('active', active)
-	            .classed('switch', function(d) { return d.id === previousBackgroundID(); })
-	            .call(setTooltips)
-	            .selectAll('input')
-	            .property('checked', active);
+	    for (var j = 0; j < ring[ring.length - 1].length; j++) {
+	      // Check if first point of Polygon contains two numbers
+	      if (ring[ring.length - 1][j] !== ring[0][j]) {
+	        throw new Error("First and last Position are not equivalent.");
+	      }
 	    }
+	  }
 
+	  var geom = {
+	    type: "Polygon",
+	    coordinates: coordinates
+	  };
+	  return feature(geom, properties, options);
+	}
+	/**
+	 * Creates a {@link LineString} {@link Feature} from an Array of Positions.
+	 *
+	 * @name lineString
+	 * @param {Array<Array<number>>} coordinates an array of Positions
+	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+	 * @param {Object} [options={}] Optional Parameters
+	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+	 * @param {string|number} [options.id] Identifier associated with the Feature
+	 * @returns {Feature<LineString>} LineString Feature
+	 * @example
+	 * var linestring1 = turf.lineString([[-24, 63], [-23, 60], [-25, 65], [-20, 69]], {name: 'line 1'});
+	 * var linestring2 = turf.lineString([[-14, 43], [-13, 40], [-15, 45], [-10, 49]], {name: 'line 2'});
+	 *
+	 * //=linestring1
+	 * //=linestring2
+	 */
 
-	    function chooseBackground(d) {
-	        if (d.id === 'custom' && !d.template()) {
-	            return editCustom();
-	        }
+	function lineString(coordinates, properties, options) {
+	  if (options === void 0) {
+	    options = {};
+	  }
 
-	        event.preventDefault();
-	        var previousBackground = context.background().baseLayerSource();
-	        corePreferences('background-last-used-toggle', previousBackground.id);
-	        corePreferences('background-last-used', d.id);
-	        context.background().baseLayerSource(d);
-	        document.activeElement.blur();
-	    }
+	  if (coordinates.length < 2) {
+	    throw new Error("coordinates must be an array of two or more positions");
+	  }
 
+	  var geom = {
+	    type: "LineString",
+	    coordinates: coordinates
+	  };
+	  return feature(geom, properties, options);
+	}
+	/**
+	 * Creates a {@link Feature<MultiLineString>} based on a
+	 * coordinate array. Properties can be added optionally.
+	 *
+	 * @name multiLineString
+	 * @param {Array<Array<Array<number>>>} coordinates an array of LineStrings
+	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+	 * @param {Object} [options={}] Optional Parameters
+	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+	 * @param {string|number} [options.id] Identifier associated with the Feature
+	 * @returns {Feature<MultiLineString>} a MultiLineString feature
+	 * @throws {Error} if no coordinates are passed
+	 * @example
+	 * var multiLine = turf.multiLineString([[[0,0],[10,10]]]);
+	 *
+	 * //=multiLine
+	 */
 
-	    function customChanged(d) {
-	        if (d && d.template) {
-	            _customSource.template(d.template);
-	            chooseBackground(_customSource);
-	        } else {
-	            _customSource.template('');
-	            chooseBackground(context.background().findSource('none'));
-	        }
-	    }
+	function multiLineString(coordinates, properties, options) {
+	  if (options === void 0) {
+	    options = {};
+	  }
 
+	  var geom = {
+	    type: "MultiLineString",
+	    coordinates: coordinates
+	  };
+	  return feature(geom, properties, options);
+	}
+	/**
+	 * Creates a {@link Feature<MultiPolygon>} based on a
+	 * coordinate array. Properties can be added optionally.
+	 *
+	 * @name multiPolygon
+	 * @param {Array<Array<Array<Array<number>>>>} coordinates an array of Polygons
+	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+	 * @param {Object} [options={}] Optional Parameters
+	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+	 * @param {string|number} [options.id] Identifier associated with the Feature
+	 * @returns {Feature<MultiPolygon>} a multipolygon feature
+	 * @throws {Error} if no coordinates are passed
+	 * @example
+	 * var multiPoly = turf.multiPolygon([[[[0,0],[0,10],[10,10],[10,0],[0,0]]]]);
+	 *
+	 * //=multiPoly
+	 *
+	 */
 
-	    function editCustom() {
-	        event.preventDefault();
-	        context.container()
-	            .call(_settingsCustomBackground);
-	    }
+	function multiPolygon(coordinates, properties, options) {
+	  if (options === void 0) {
+	    options = {};
+	  }
 
+	  var geom = {
+	    type: "MultiPolygon",
+	    coordinates: coordinates
+	  };
+	  return feature(geom, properties, options);
+	}
 
-	    context.background()
-	        .on('change.background_list', function() {
-	            _backgroundList.call(updateLayerSelections);
-	        });
+	/**
+	 * Get Geometry from Feature or Geometry Object
+	 *
+	 * @param {Feature|Geometry} geojson GeoJSON Feature or Geometry Object
+	 * @returns {Geometry|null} GeoJSON Geometry Object
+	 * @throws {Error} if geojson is not a Feature or Geometry Object
+	 * @example
+	 * var point = {
+	 *   "type": "Feature",
+	 *   "properties": {},
+	 *   "geometry": {
+	 *     "type": "Point",
+	 *     "coordinates": [110, 40]
+	 *   }
+	 * }
+	 * var geom = turf.getGeom(point)
+	 * //={"type": "Point", "coordinates": [110, 40]}
+	 */
 
-	    context.map()
-	        .on('move.background_list',
-	            debounce(function() {
-	                // layers in-view may have changed due to map move
-	                window.requestIdleCallback(section.reRender);
-	            }, 1000)
-	        );
+	function getGeom(geojson) {
+	  if (geojson.type === "Feature") {
+	    return geojson.geometry;
+	  }
 
-	    return section;
+	  return geojson;
 	}
 
-	function uiSectionBackgroundOffset(context) {
-
-	    var section = uiSection('background-offset', context)
-	        .title(_t('background.fix_misalignment'))
-	        .disclosureContent(renderDisclosureContent)
-	        .expandedByDefault(false);
-
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	// Cohen-Sutherland line clipping algorithm, adapted to efficiently
+	// handle polylines rather than just segments
+	function lineclip(points, bbox, result) {
+	  var len = points.length,
+	      codeA = bitCode(points[0], bbox),
+	      part = [],
+	      i,
+	      codeB,
+	      lastCode;
+	  var a;
+	  var b;
+	  if (!result) result = [];
 
-	    var _directions = [
-	        ['right', [0.5, 0]],
-	        ['top', [0, -0.5]],
-	        ['left', [-0.5, 0]],
-	        ['bottom', [0, 0.5]]
-	    ];
+	  for (i = 1; i < len; i++) {
+	    a = points[i - 1];
+	    b = points[i];
+	    codeB = lastCode = bitCode(b, bbox);
 
+	    while (true) {
+	      if (!(codeA | codeB)) {
+	        // accept
+	        part.push(a);
+
+	        if (codeB !== lastCode) {
+	          // segment went outside
+	          part.push(b);
+
+	          if (i < len - 1) {
+	            // start a new line
+	            result.push(part);
+	            part = [];
+	          }
+	        } else if (i === len - 1) {
+	          part.push(b);
+	        }
 
-	    function cancelEvent() {
-	        event.stopPropagation();
-	        event.preventDefault();
+	        break;
+	      } else if (codeA & codeB) {
+	        // trivial reject
+	        break;
+	      } else if (codeA) {
+	        // a outside, intersect with clip edge
+	        a = intersect(a, b, codeA, bbox);
+	        codeA = bitCode(a, bbox);
+	      } else {
+	        // b outside
+	        b = intersect(a, b, codeB, bbox);
+	        codeB = bitCode(b, bbox);
+	      }
 	    }
 
+	    codeA = lastCode;
+	  }
 
-	    function updateValue() {
-	        var meters = geoOffsetToMeters(context.background().offset());
-	        var x = +meters[0].toFixed(2);
-	        var y = +meters[1].toFixed(2);
-
-	        context.container().selectAll('.nudge-inner-rect')
-	            .select('input')
-	            .classed('error', false)
-	            .property('value', x + ', ' + y);
+	  if (part.length) result.push(part);
+	  return result;
+	} // Sutherland-Hodgeman polygon clipping algorithm
 
-	        context.container().selectAll('.nudge-reset')
-	            .classed('disabled', function() {
-	                return (x === 0 && y === 0);
-	            });
-	    }
+	function polygonclip(points, bbox) {
+	  var result, edge, prev, prevInside, i, p, inside; // clip against each side of the clip rectangle
 
+	  for (edge = 1; edge <= 8; edge *= 2) {
+	    result = [];
+	    prev = points[points.length - 1];
+	    prevInside = !(bitCode(prev, bbox) & edge);
 
-	    function resetOffset() {
-	        context.background().offset([0, 0]);
-	        updateValue();
-	    }
+	    for (i = 0; i < points.length; i++) {
+	      p = points[i];
+	      inside = !(bitCode(p, bbox) & edge); // if segment goes through the clip window, add an intersection
 
+	      if (inside !== prevInside) result.push(intersect(prev, p, edge, bbox));
+	      if (inside) result.push(p); // add a point if it's inside
 
-	    function nudge(d) {
-	        context.background().nudge(d, context.map().zoom());
-	        updateValue();
+	      prev = p;
+	      prevInside = inside;
 	    }
 
+	    points = result;
+	    if (!points.length) break;
+	  }
 
-	    function pointerdownNudgeButton(d) {
-	        var interval;
-	        var timeout = window.setTimeout(function() {
-	                interval = window.setInterval(nudge.bind(null, d), 100);
-	            }, 500);
+	  return result;
+	} // intersect a segment against one of the 4 lines that make up the bbox
 
-	        function doneNudge() {
-	            window.clearTimeout(timeout);
-	            window.clearInterval(interval);
-	            select(window)
-	                .on(_pointerPrefix + 'up.buttonoffset', null, true)
-	                .on(_pointerPrefix + 'down.buttonoffset', null, true);
-	        }
+	function intersect(a, b, edge, bbox) {
+	  return edge & 8 ? [a[0] + (b[0] - a[0]) * (bbox[3] - a[1]) / (b[1] - a[1]), bbox[3]] // top
+	  : edge & 4 ? [a[0] + (b[0] - a[0]) * (bbox[1] - a[1]) / (b[1] - a[1]), bbox[1]] // bottom
+	  : edge & 2 ? [bbox[2], a[1] + (b[1] - a[1]) * (bbox[2] - a[0]) / (b[0] - a[0])] // right
+	  : edge & 1 ? [bbox[0], a[1] + (b[1] - a[1]) * (bbox[0] - a[0]) / (b[0] - a[0])] // left
+	  : null;
+	} // bit code reflects the point position relative to the bbox:
+	//         left  mid  right
+	//    top  1001  1000  1010
+	//    mid  0001  0000  0010
+	// bottom  0101  0100  0110
 
-	        select(window)
-	            .on(_pointerPrefix + 'up.buttonoffset', doneNudge, true)
-	            .on(_pointerPrefix + 'down.buttonoffset', doneNudge, true);
 
-	        nudge(d);
-	    }
+	function bitCode(p, bbox) {
+	  var code = 0;
+	  if (p[0] < bbox[0]) code |= 1; // left
+	  else if (p[0] > bbox[2]) code |= 2; // right
 
+	  if (p[1] < bbox[1]) code |= 4; // bottom
+	  else if (p[1] > bbox[3]) code |= 8; // top
 
-	    function inputOffset() {
-	        var input = select(this);
-	        var d = input.node().value;
+	  return code;
+	}
 
-	        if (d === '') { return resetOffset(); }
+	/**
+	 * Takes a {@link Feature} and a bbox and clips the feature to the bbox using
+	 * [lineclip](https://github.com/mapbox/lineclip).
+	 * May result in degenerate edges when clipping Polygons.
+	 *
+	 * @name bboxClip
+	 * @param {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} feature feature to clip to the bbox
+	 * @param {BBox} bbox extent in [minX, minY, maxX, maxY] order
+	 * @returns {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} clipped Feature
+	 * @example
+	 * var bbox = [0, 0, 10, 10];
+	 * var poly = turf.polygon([[[2, 2], [8, 4], [12, 8], [3, 7], [2, 2]]]);
+	 *
+	 * var clipped = turf.bboxClip(poly, bbox);
+	 *
+	 * //addToMap
+	 * var addToMap = [bbox, poly, clipped]
+	 */
 
-	        d = d.replace(/;/g, ',').split(',').map(function(n) {
-	            // if n is NaN, it will always get mapped to false.
-	            return !isNaN(n) && n;
-	        });
+	function bboxClip(feature, bbox) {
+	  var geom = getGeom(feature);
+	  var type = geom.type;
+	  var properties = feature.type === "Feature" ? feature.properties : {};
+	  var coords = geom.coordinates;
+
+	  switch (type) {
+	    case "LineString":
+	    case "MultiLineString":
+	      var lines_1 = [];
+
+	      if (type === "LineString") {
+	        coords = [coords];
+	      }
 
-	        if (d.length !== 2 || !d[0] || !d[1]) {
-	            input.classed('error', true);
-	            return;
-	        }
+	      coords.forEach(function (line) {
+	        lineclip(line, bbox, lines_1);
+	      });
 
-	        context.background().offset(geoMetersToOffset(d));
-	        updateValue();
-	    }
+	      if (lines_1.length === 1) {
+	        return lineString(lines_1[0], properties);
+	      }
 
+	      return multiLineString(lines_1, properties);
 
-	    function dragOffset() {
-	        if (event.button !== 0) { return; }
+	    case "Polygon":
+	      return polygon(clipPolygon(coords, bbox), properties);
 
-	        var origin = [event.clientX, event.clientY];
+	    case "MultiPolygon":
+	      return multiPolygon(coords.map(function (poly) {
+	        return clipPolygon(poly, bbox);
+	      }), properties);
 
-	        var pointerId = event.pointerId || 'mouse';
+	    default:
+	      throw new Error("geometry " + type + " not supported");
+	  }
+	}
 
-	        context.container()
-	            .append('div')
-	            .attr('class', 'nudge-surface');
+	function clipPolygon(rings, bbox) {
+	  var outRings = [];
 
-	        select(window)
-	            .on(_pointerPrefix + 'move.drag-bg-offset', pointermove)
-	            .on(_pointerPrefix + 'up.drag-bg-offset', pointerup);
+	  for (var _i = 0, rings_1 = rings; _i < rings_1.length; _i++) {
+	    var ring = rings_1[_i];
+	    var clipped = polygonclip(ring, bbox);
 
-	        if (_pointerPrefix === 'pointer') {
-	            select(window)
-	                .on('pointercancel.drag-bg-offset', pointerup);
-	        }
+	    if (clipped.length > 0) {
+	      if (clipped[0][0] !== clipped[clipped.length - 1][0] || clipped[0][1] !== clipped[clipped.length - 1][1]) {
+	        clipped.push(clipped[0]);
+	      }
 
-	        function pointermove() {
-	            if (pointerId !== (event.pointerId || 'mouse')) { return; }
+	      if (clipped.length >= 4) {
+	        outRings.push(clipped);
+	      }
+	    }
+	  }
 
-	            var latest = [event.clientX, event.clientY];
-	            var d = [
-	                -(origin[0] - latest[0]) / 4,
-	                -(origin[1] - latest[1]) / 4
-	            ];
+	  return outRings;
+	}
 
-	            origin = latest;
-	            nudge(d);
-	        }
+	var tiler = utilTiler().tileSize(512).margin(1);
+	var dispatch = dispatch$8('loadedData');
 
-	        function pointerup() {
-	            if (pointerId !== (event.pointerId || 'mouse')) { return; }
-	            if (event.button !== 0) { return; }
+	var _vtCache;
 
-	            context.container().selectAll('.nudge-surface')
-	                .remove();
+	function abortRequest(controller) {
+	  controller.abort();
+	}
 
-	            select(window)
-	                .on('.drag-bg-offset', null);
-	        }
-	    }
+	function vtToGeoJSON(data, tile, mergeCache) {
+	  var vectorTile$1 = new vectorTile.VectorTile(new pbf(data));
+	  var layers = Object.keys(vectorTile$1.layers);
 
+	  if (!Array.isArray(layers)) {
+	    layers = [layers];
+	  }
 
-	    function renderDisclosureContent(selection) {
-	        var container = selection.selectAll('.nudge-container')
-	            .data([0]);
+	  var features = [];
+	  layers.forEach(function (layerID) {
+	    var layer = vectorTile$1.layers[layerID];
 
-	        var containerEnter = container.enter()
-	            .append('div')
-	            .attr('class', 'nudge-container cf');
+	    if (layer) {
+	      for (var i = 0; i < layer.length; i++) {
+	        var feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
+	        var geometry = feature.geometry; // Treat all Polygons as MultiPolygons
 
-	        containerEnter
-	            .append('div')
-	            .attr('class', 'nudge-instructions')
-	            .text(_t('background.offset'));
+	        if (geometry.type === 'Polygon') {
+	          geometry.type = 'MultiPolygon';
+	          geometry.coordinates = [geometry.coordinates];
+	        }
 
-	        var nudgeEnter = containerEnter
-	            .append('div')
-	            .attr('class', 'nudge-outer-rect')
-	            .on(_pointerPrefix + 'down', dragOffset);
+	        var isClipped = false; // Clip to tile bounds
 
-	        nudgeEnter
-	            .append('div')
-	            .attr('class', 'nudge-inner-rect')
-	            .append('input')
-	            .on('change', inputOffset);
+	        if (geometry.type === 'MultiPolygon') {
+	          var featureClip = bboxClip(feature, tile.extent.rectangle());
 
-	        containerEnter
-	            .append('div')
-	            .selectAll('button')
-	            .data(_directions).enter()
-	            .append('button')
-	            .attr('class', function(d) { return d[0] + ' nudge'; })
-	            .on('contextmenu', cancelEvent)
-	            .on(_pointerPrefix + 'down', function(d) {
-	                if (event.button !== 0) { return; }
-	                pointerdownNudgeButton(d[1]);
-	            });
+	          if (!fastDeepEqual(feature.geometry, featureClip.geometry)) {
+	            // feature = featureClip;
+	            isClipped = true;
+	          }
 
-	        containerEnter
-	            .append('button')
-	            .attr('title', _t('background.reset'))
-	            .attr('class', 'nudge-reset disabled')
-	            .on('contextmenu', cancelEvent)
-	            .on('click', function() {
-	                event.preventDefault();
-	                if (event.button !== 0) { return; }
-	                resetOffset();
-	            })
-	            .call(svgIcon('#iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')));
+	          if (!feature.geometry.coordinates.length) continue; // not actually on this tile
 
-	        updateValue();
-	    }
+	          if (!feature.geometry.coordinates[0].length) continue; // not actually on this tile
+	        } // Generate some unique IDs and add some metadata
 
-	    context.background()
-	        .on('change.backgroundOffset-update', updateValue);
 
-	    return section;
-	}
+	        var featurehash = utilHashcode(fastJsonStableStringify(feature));
+	        var propertyhash = utilHashcode(fastJsonStableStringify(feature.properties || {}));
+	        feature.__layerID__ = layerID.replace(/[^_a-zA-Z0-9\-]/g, '_');
+	        feature.__featurehash__ = featurehash;
+	        feature.__propertyhash__ = propertyhash;
+	        features.push(feature); // Clipped Polygons at same zoom with identical properties can get merged
 
-	function uiSectionOverlayList(context) {
+	        if (isClipped && geometry.type === 'MultiPolygon') {
+	          var merged = mergeCache[propertyhash];
 
-	    var section = uiSection('overlay-list', context)
-	        .title(_t('background.overlays'))
-	        .disclosureContent(renderDisclosureContent);
+	          if (merged && merged.length) {
+	            var other = merged[0];
+	            var coords = index.union(feature.geometry.coordinates, other.geometry.coordinates);
 
-	    var _overlayList = select(null);
+	            if (!coords || !coords.length) {
+	              continue; // something failed in polygon union
+	            }
 
-	    function setTooltips(selection) {
-	        selection.each(function(d, i, nodes) {
-	            var item = select(this).select('label');
-	            var span = item.select('span');
-	            var placement = (i < nodes.length / 2) ? 'bottom' : 'top';
-	            var description = d.description();
-	            var isOverflowing = (span.property('clientWidth') !== span.property('scrollWidth'));
+	            merged.push(feature);
 
-	            item.call(uiTooltip().destroyAny);
+	            for (var j = 0; j < merged.length; j++) {
+	              // all these features get...
+	              merged[j].geometry.coordinates = coords; // same coords
 
-	            if (description || isOverflowing) {
-	                item.call(uiTooltip()
-	                    .placement(placement)
-	                    .title(description || d.name())
-	                );
+	              merged[j].__featurehash__ = featurehash; // same hash, so deduplication works
 	            }
-	        });
-	    }
-
-	    function updateLayerSelections(selection) {
-	        function active(d) {
-	            return context.background().showsLayer(d);
+	          } else {
+	            mergeCache[propertyhash] = [feature];
+	          }
 	        }
-
-	        selection.selectAll('li')
-	            .classed('active', active)
-	            .call(setTooltips)
-	            .selectAll('input')
-	            .property('checked', active);
+	      }
 	    }
+	  });
+	  return features;
+	}
 
-
-	    function chooseOverlay(d) {
-	        event.preventDefault();
-	        context.background().toggleOverlayLayer(d);
-	        _overlayList.call(updateLayerSelections);
-	        document.activeElement.blur();
+	function loadTile(source, tile) {
+	  if (source.loaded[tile.id] || source.inflight[tile.id]) return;
+	  var url = source.template.replace('{x}', tile.xyz[0]).replace('{y}', tile.xyz[1]) // TMS-flipped y coordinate
+	  .replace(/\{[t-]y\}/, Math.pow(2, tile.xyz[2]) - tile.xyz[1] - 1).replace(/\{z(oom)?\}/, tile.xyz[2]).replace(/\{switch:([^}]+)\}/, function (s, r) {
+	    var subdomains = r.split(',');
+	    return subdomains[(tile.xyz[0] + tile.xyz[1]) % subdomains.length];
+	  });
+	  var controller = new AbortController();
+	  source.inflight[tile.id] = controller;
+	  fetch(url, {
+	    signal: controller.signal
+	  }).then(function (response) {
+	    if (!response.ok) {
+	      throw new Error(response.status + ' ' + response.statusText);
 	    }
 
-	    function drawListItems(layerList, type, change, filter) {
-	        var sources = context.background()
-	            .sources(context.map().extent(), context.map().zoom(), true)
-	            .filter(filter);
-
-	        var layerLinks = layerList.selectAll('li')
-	            .data(sources, function(d) { return d.name(); });
+	    source.loaded[tile.id] = [];
+	    delete source.inflight[tile.id];
+	    return response.arrayBuffer();
+	  }).then(function (data) {
+	    if (!data) {
+	      throw new Error('No Data');
+	    }
 
-	        layerLinks.exit()
-	            .remove();
+	    var z = tile.xyz[2];
 
-	        var enter = layerLinks.enter()
-	            .append('li');
+	    if (!source.canMerge[z]) {
+	      source.canMerge[z] = {}; // initialize mergeCache
+	    }
 
-	        var label = enter
-	            .append('label');
+	    source.loaded[tile.id] = vtToGeoJSON(data, tile, source.canMerge[z]);
+	    dispatch.call('loadedData');
+	  })["catch"](function () {
+	    source.loaded[tile.id] = [];
+	    delete source.inflight[tile.id];
+	  });
+	}
 
-	        label
-	            .append('input')
-	            .attr('type', type)
-	            .attr('name', 'layers')
-	            .on('change', change);
+	var serviceVectorTile = {
+	  init: function init() {
+	    if (!_vtCache) {
+	      this.reset();
+	    }
 
-	        label
-	            .append('span')
-	            .text(function(d) { return d.name(); });
+	    this.event = utilRebind(this, dispatch, 'on');
+	  },
+	  reset: function reset() {
+	    for (var sourceID in _vtCache) {
+	      var source = _vtCache[sourceID];
 
+	      if (source && source.inflight) {
+	        Object.values(source.inflight).forEach(abortRequest);
+	      }
+	    }
 
-	        layerList.selectAll('li')
-	            .sort(sortSources);
+	    _vtCache = {};
+	  },
+	  addSource: function addSource(sourceID, template) {
+	    _vtCache[sourceID] = {
+	      template: template,
+	      inflight: {},
+	      loaded: {},
+	      canMerge: {}
+	    };
+	    return _vtCache[sourceID];
+	  },
+	  data: function data(sourceID, projection) {
+	    var source = _vtCache[sourceID];
+	    if (!source) return [];
+	    var tiles = tiler.getTiles(projection);
+	    var seen = {};
+	    var results = [];
 
-	        layerList
-	            .call(updateLayerSelections);
+	    for (var i = 0; i < tiles.length; i++) {
+	      var features = source.loaded[tiles[i].id];
+	      if (!features || !features.length) continue;
 
+	      for (var j = 0; j < features.length; j++) {
+	        var feature = features[j];
+	        var hash = feature.__featurehash__;
+	        if (seen[hash]) continue;
+	        seen[hash] = true; // return a shallow copy, because the hash may change
+	        // later if this feature gets merged with another
 
-	        function sortSources(a, b) {
-	            return a.best() && !b.best() ? -1
-	                : b.best() && !a.best() ? 1
-	                : d3_descending(a.area(), b.area()) || d3_ascending(a.name(), b.name()) || 0;
-	        }
+	        results.push(Object.assign({}, feature)); // shallow copy
+	      }
 	    }
 
-	    function renderDisclosureContent(selection) {
-
-	        var container = selection.selectAll('.layer-overlay-list')
-	            .data([0]);
-
-	        _overlayList = container.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-overlay-list')
-	            .attr('dir', 'auto')
-	            .merge(container);
+	    return results;
+	  },
+	  loadTiles: function loadTiles(sourceID, template, projection) {
+	    var source = _vtCache[sourceID];
 
-	        _overlayList
-	            .call(drawListItems, 'checkbox', chooseOverlay, function(d) { return !d.isHidden() && d.overlay; });
+	    if (!source) {
+	      source = this.addSource(sourceID, template);
 	    }
 
-	    context.map()
-	        .on('move.overlay_list',
-	            debounce(function() {
-	                // layers in-view may have changed due to map move
-	                window.requestIdleCallback(section.reRender);
-	            }, 1000)
-	        );
+	    var tiles = tiler.getTiles(projection); // abort inflight requests that are no longer needed
 
-	    return section;
-	}
+	    Object.keys(source.inflight).forEach(function (k) {
+	      var wanted = tiles.find(function (tile) {
+	        return k === tile.id;
+	      });
 
-	function uiPaneBackground(context) {
+	      if (!wanted) {
+	        abortRequest(source.inflight[k]);
+	        delete source.inflight[k];
+	      }
+	    });
+	    tiles.forEach(function (tile) {
+	      loadTile(source, tile);
+	    });
+	  },
+	  cache: function cache() {
+	    return _vtCache;
+	  }
+	};
 
-	    var backgroundPane = uiPane('background', context)
-	        .key(_t('background.key'))
-	        .title(_t('background.title'))
-	        .description(_t('background.description'))
-	        .iconName('iD-icon-layers')
-	        .sections([
-	            uiSectionBackgroundList(context),
-	            uiSectionOverlayList(context),
-	            uiSectionBackgroundDisplayOptions(context),
-	            uiSectionBackgroundOffset(context)
-	        ]);
+	var apibase = 'https://www.wikidata.org/w/api.php?';
+	var _wikidataCache = {};
+	var serviceWikidata = {
+	  init: function init() {},
+	  reset: function reset() {
+	    _wikidataCache = {};
+	  },
+	  // Search for Wikidata items matching the query
+	  itemsForSearchQuery: function itemsForSearchQuery(query, callback) {
+	    if (!query) {
+	      if (callback) callback('No query', {});
+	      return;
+	    }
 
-	    return backgroundPane;
-	}
+	    var lang = this.languagesToQuery()[0];
+	    var url = apibase + utilQsString({
+	      action: 'wbsearchentities',
+	      format: 'json',
+	      formatversion: 2,
+	      search: query,
+	      type: 'item',
+	      // the language to search
+	      language: lang,
+	      // the language for the label and description in the result
+	      uselang: lang,
+	      limit: 10,
+	      origin: '*'
+	    });
+	    d3_json(url).then(function (result) {
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      }
 
-	function uiPaneHelp(context) {
+	      if (callback) callback(null, result.search || {});
+	    })["catch"](function (err) {
+	      if (callback) callback(err.message, {});
+	    });
+	  },
+	  // Given a Wikipedia language and article title,
+	  // return an array of corresponding Wikidata entities.
+	  itemsByTitle: function itemsByTitle(lang, title, callback) {
+	    if (!title) {
+	      if (callback) callback('No title', {});
+	      return;
+	    }
 
-	    var docKeys = [
-	        ['help', [
-	            'welcome',
-	            'open_data_h',
-	            'open_data',
-	            'before_start_h',
-	            'before_start',
-	            'open_source_h',
-	            'open_source',
-	            'open_source_help'
-	        ]],
-	        ['overview', [
-	            'navigation_h',
-	            'navigation_drag',
-	            'navigation_zoom',
-	            'features_h',
-	            'features',
-	            'nodes_ways'
-	        ]],
-	        ['editing', [
-	            'select_h',
-	            'select_left_click',
-	            'select_right_click',
-	            'select_space',
-	            'multiselect_h',
-	            'multiselect',
-	            'multiselect_shift_click',
-	            'multiselect_lasso',
-	            'undo_redo_h',
-	            'undo_redo',
-	            'save_h',
-	            'save',
-	            'save_validation',
-	            'upload_h',
-	            'upload',
-	            'backups_h',
-	            'backups',
-	            'keyboard_h',
-	            'keyboard'
-	        ]],
-	        ['feature_editor', [
-	            'intro',
-	            'definitions',
-	            'type_h',
-	            'type',
-	            'type_picker',
-	            'fields_h',
-	            'fields_all_fields',
-	            'fields_example',
-	            'fields_add_field',
-	            'tags_h',
-	            'tags_all_tags',
-	            'tags_resources'
-	        ]],
-	        ['points', [
-	            'intro',
-	            'add_point_h',
-	            'add_point',
-	            'add_point_finish',
-	            'move_point_h',
-	            'move_point',
-	            'delete_point_h',
-	            'delete_point',
-	            'delete_point_command'
-	        ]],
-	        ['lines', [
-	            'intro',
-	            'add_line_h',
-	            'add_line',
-	            'add_line_draw',
-	            'add_line_continue',
-	            'add_line_finish',
-	            'modify_line_h',
-	            'modify_line_dragnode',
-	            'modify_line_addnode',
-	            'connect_line_h',
-	            'connect_line',
-	            'connect_line_display',
-	            'connect_line_drag',
-	            'connect_line_tag',
-	            'disconnect_line_h',
-	            'disconnect_line_command',
-	            'move_line_h',
-	            'move_line_command',
-	            'move_line_connected',
-	            'delete_line_h',
-	            'delete_line',
-	            'delete_line_command'
-	        ]],
-	        ['areas', [
-	            'intro',
-	            'point_or_area_h',
-	            'point_or_area',
-	            'add_area_h',
-	            'add_area_command',
-	            'add_area_draw',
-	            'add_area_continue',
-	            'add_area_finish',
-	            'square_area_h',
-	            'square_area_command',
-	            'modify_area_h',
-	            'modify_area_dragnode',
-	            'modify_area_addnode',
-	            'delete_area_h',
-	            'delete_area',
-	            'delete_area_command'
-	        ]],
-	        ['relations', [
-	            'intro',
-	            'edit_relation_h',
-	            'edit_relation',
-	            'edit_relation_add',
-	            'edit_relation_delete',
-	            'maintain_relation_h',
-	            'maintain_relation',
-	            'relation_types_h',
-	            'multipolygon_h',
-	            'multipolygon',
-	            'multipolygon_create',
-	            'multipolygon_merge',
-	            'turn_restriction_h',
-	            'turn_restriction',
-	            'turn_restriction_field',
-	            'turn_restriction_editing',
-	            'route_h',
-	            'route',
-	            'route_add',
-	            'boundary_h',
-	            'boundary',
-	            'boundary_add'
-	        ]],
-	        ['notes', [
-	            'intro',
-	            'add_note_h',
-	            'add_note',
-	            'place_note',
-	            'move_note',
-	            'update_note_h',
-	            'update_note',
-	            'save_note_h',
-	            'save_note'
-	        ]],
-	        ['imagery', [
-	            'intro',
-	            'sources_h',
-	            'choosing',
-	            'sources',
-	            'offsets_h',
-	            'offset',
-	            'offset_change'
-	        ]],
-	        ['streetlevel', [
-	            'intro',
-	            'using_h',
-	            'using',
-	            'photos',
-	            'viewer'
-	        ]],
-	        ['gps', [
-	            'intro',
-	            'survey',
-	            'using_h',
-	            'using',
-	            'tracing',
-	            'upload'
-	        ]],
-	        ['qa', [
-	            'intro',
-	            'tools_h',
-	            'tools',
-	            'issues_h',
-	            'issues'
-	        ]]
-	    ];
+	    lang = lang || 'en';
+	    var url = apibase + utilQsString({
+	      action: 'wbgetentities',
+	      format: 'json',
+	      formatversion: 2,
+	      sites: lang.replace(/-/g, '_') + 'wiki',
+	      titles: title,
+	      languages: 'en',
+	      // shrink response by filtering to one language
+	      origin: '*'
+	    });
+	    d3_json(url).then(function (result) {
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      }
 
-	    var headings = {
-	        'help.help.open_data_h': 3,
-	        'help.help.before_start_h': 3,
-	        'help.help.open_source_h': 3,
-	        'help.overview.navigation_h': 3,
-	        'help.overview.features_h': 3,
-	        'help.editing.select_h': 3,
-	        'help.editing.multiselect_h': 3,
-	        'help.editing.undo_redo_h': 3,
-	        'help.editing.save_h': 3,
-	        'help.editing.upload_h': 3,
-	        'help.editing.backups_h': 3,
-	        'help.editing.keyboard_h': 3,
-	        'help.feature_editor.type_h': 3,
-	        'help.feature_editor.fields_h': 3,
-	        'help.feature_editor.tags_h': 3,
-	        'help.points.add_point_h': 3,
-	        'help.points.move_point_h': 3,
-	        'help.points.delete_point_h': 3,
-	        'help.lines.add_line_h': 3,
-	        'help.lines.modify_line_h': 3,
-	        'help.lines.connect_line_h': 3,
-	        'help.lines.disconnect_line_h': 3,
-	        'help.lines.move_line_h': 3,
-	        'help.lines.delete_line_h': 3,
-	        'help.areas.point_or_area_h': 3,
-	        'help.areas.add_area_h': 3,
-	        'help.areas.square_area_h': 3,
-	        'help.areas.modify_area_h': 3,
-	        'help.areas.delete_area_h': 3,
-	        'help.relations.edit_relation_h': 3,
-	        'help.relations.maintain_relation_h': 3,
-	        'help.relations.relation_types_h': 2,
-	        'help.relations.multipolygon_h': 3,
-	        'help.relations.turn_restriction_h': 3,
-	        'help.relations.route_h': 3,
-	        'help.relations.boundary_h': 3,
-	        'help.notes.add_note_h': 3,
-	        'help.notes.update_note_h': 3,
-	        'help.notes.save_note_h': 3,
-	        'help.imagery.sources_h': 3,
-	        'help.imagery.offsets_h': 3,
-	        'help.streetlevel.using_h': 3,
-	        'help.gps.using_h': 3,
-	        'help.qa.tools_h': 3,
-	        'help.qa.issues_h': 3
-	    };
+	      if (callback) callback(null, result.entities || {});
+	    })["catch"](function (err) {
+	      if (callback) callback(err.message, {});
+	    });
+	  },
+	  languagesToQuery: function languagesToQuery() {
+	    return _mainLocalizer.localeCodes().map(function (code) {
+	      return code.toLowerCase();
+	    }).filter(function (code) {
+	      // HACK: en-us isn't a wikidata language. We should really be filtering by
+	      // the languages known to be supported by wikidata.
+	      return code !== 'en-us';
+	    });
+	  },
+	  entityByQID: function entityByQID(qid, callback) {
+	    if (!qid) {
+	      callback('No qid', {});
+	      return;
+	    }
 
-	    // For each section, squash all the texts into a single markdown document
-	    var docs = docKeys.map(function(key) {
-	        var helpkey = 'help.' + key[0];
-	        var helpPaneReplacements = { version: context.version };
-	        var text = key[1].reduce(function(all, part) {
-	            var subkey = helpkey + '.' + part;
-	            var depth = headings[subkey];                              // is this subkey a heading?
-	            var hhh = depth ? Array(depth + 1).join('#') + ' ' : '';   // if so, prepend with some ##'s
-	            return all + hhh + helpString(subkey, helpPaneReplacements) + '\n\n';
-	        }, '');
+	    if (_wikidataCache[qid]) {
+	      if (callback) callback(null, _wikidataCache[qid]);
+	      return;
+	    }
 
-	        return {
-	            title: _t(helpkey + '.title'),
-	            html: marked_1(text.trim())
-	                // use keyboard key styling for shortcuts
-	                .replace(/<code>/g, '<kbd>')
-	                .replace(/<\/code>/g, '<\/kbd>')
-	        };
+	    var langs = this.languagesToQuery();
+	    var url = apibase + utilQsString({
+	      action: 'wbgetentities',
+	      format: 'json',
+	      formatversion: 2,
+	      ids: qid,
+	      props: 'labels|descriptions|claims|sitelinks',
+	      sitefilter: langs.map(function (d) {
+	        return d + 'wiki';
+	      }).join('|'),
+	      languages: langs.join('|'),
+	      languagefallback: 1,
+	      origin: '*'
 	    });
+	    d3_json(url).then(function (result) {
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      }
 
-	    var helpPane = uiPane('help', context)
-	        .key(_t('help.key'))
-	        .title(_t('help.title'))
-	        .description(_t('help.title'))
-	        .iconName('iD-icon-help');
+	      if (callback) callback(null, result.entities[qid] || {});
+	    })["catch"](function (err) {
+	      if (callback) callback(err.message, {});
+	    });
+	  },
+	  // Pass `params` object of the form:
+	  // {
+	  //   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
+	  // }
+	  //
+	  // Get an result object used to display tag documentation
+	  // {
+	  //   title:        'string',
+	  //   description:  'string',
+	  //   editURL:      'string',
+	  //   imageURL:     'string',
+	  //   wiki:         { title: 'string', text: 'string', url: 'string' }
+	  // }
+	  //
+	  getDocs: function getDocs(params, callback) {
+	    var langs = this.languagesToQuery();
+	    this.entityByQID(params.qid, function (err, entity) {
+	      if (err || !entity) {
+	        callback(err || 'No entity');
+	        return;
+	      }
 
-	    helpPane.renderContent = function(content) {
+	      var i;
+	      var description;
 
-	        function clickHelp(d, i) {
-	            var rtl = (_mainLocalizer.textDirection() === 'rtl');
-	            content.property('scrollTop', 0);
-	            helpPane.selection().select('.pane-heading h2').html(d.title);
+	      for (i in langs) {
+	        var code = langs[i];
 
-	            body.html(d.html);
-	            body.selectAll('a')
-	                .attr('target', '_blank');
-	            menuItems.classed('selected', function(m) {
-	                return m.title === d.title;
-	            });
+	        if (entity.descriptions[code] && entity.descriptions[code].language === code) {
+	          description = entity.descriptions[code];
+	          break;
+	        }
+	      }
 
-	            nav.html('');
-	            if (rtl) {
-	                nav.call(drawNext).call(drawPrevious);
-	            } else {
-	                nav.call(drawPrevious).call(drawNext);
-	            }
+	      if (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result
 
+	      var result = {
+	        title: entity.id,
+	        description: description ? description.value : '',
+	        descriptionLocaleCode: description ? description.language : '',
+	        editURL: 'https://www.wikidata.org/wiki/' + entity.id
+	      }; // add image
 
-	            function drawNext(selection) {
-	                if (i < docs.length - 1) {
-	                    var nextLink = selection
-	                        .append('a')
-	                        .attr('class', 'next')
-	                        .on('click', function() {
-	                            clickHelp(docs[i + 1], i + 1);
-	                        });
+	      if (entity.claims) {
+	        var imageroot = 'https://commons.wikimedia.org/w/index.php';
+	        var props = ['P154', 'P18']; // logo image, image
 
-	                    nextLink
-	                        .append('span')
-	                        .text(docs[i + 1].title)
-	                        .call(svgIcon((rtl ? '#iD-icon-backward' : '#iD-icon-forward'), 'inline'));
-	                }
-	            }
+	        var prop, image;
 
+	        for (i = 0; i < props.length; i++) {
+	          prop = entity.claims[props[i]];
 
-	            function drawPrevious(selection) {
-	                if (i > 0) {
-	                    var prevLink = selection
-	                        .append('a')
-	                        .attr('class', 'previous')
-	                        .on('click', function() {
-	                            clickHelp(docs[i - 1], i - 1);
-	                        });
+	          if (prop && Object.keys(prop).length > 0) {
+	            image = prop[Object.keys(prop)[0]].mainsnak.datavalue.value;
 
-	                    prevLink
-	                        .call(svgIcon((rtl ? '#iD-icon-forward' : '#iD-icon-backward'), 'inline'))
-	                        .append('span')
-	                        .text(docs[i - 1].title);
-	                }
+	            if (image) {
+	              result.imageURL = imageroot + '?' + utilQsString({
+	                title: 'Special:Redirect/file/' + image,
+	                width: 400
+	              });
+	              break;
 	            }
+	          }
 	        }
+	      }
 
+	      if (entity.sitelinks) {
+	        var englishLocale = _mainLocalizer.languageCode().toLowerCase() === 'en'; // must be one of these that we requested..
 
-	        function clickWalkthrough() {
-	            if (context.inIntro()) { return; }
-	            context.container().call(uiIntro(context));
-	            context.ui().togglePanes();
-	        }
+	        for (i = 0; i < langs.length; i++) {
+	          // check each, in order of preference
+	          var w = langs[i] + 'wiki';
 
+	          if (entity.sitelinks[w]) {
+	            var title = entity.sitelinks[w].title;
+	            var tKey = 'inspector.wiki_reference';
+
+	            if (!englishLocale && langs[i] === 'en') {
+	              // user's locale isn't English but
+	              tKey = 'inspector.wiki_en_reference'; // we are sending them to enwiki anyway..
+	            }
 
-	        function clickShortcuts() {
-	            context.container().call(uiShortcuts(context), true);
+	            result.wiki = {
+	              title: title,
+	              text: tKey,
+	              url: 'https://' + langs[i] + '.wikipedia.org/wiki/' + title.replace(/ /g, '_')
+	            };
+	            break;
+	          }
 	        }
+	      }
 
-	        var toc = content
-	            .append('ul')
-	            .attr('class', 'toc');
+	      callback(null, result);
+	    });
+	  }
+	};
 
-	        var menuItems = toc.selectAll('li')
-	            .data(docs)
-	            .enter()
-	            .append('li')
-	            .append('a')
-	            .html(function(d) { return d.title; })
-	            .on('click', clickHelp);
-
-	        var shortcuts = toc
-	            .append('li')
-	            .attr('class', 'shortcuts')
-	            .call(uiTooltip()
-	                .title(_t('shortcuts.tooltip'))
-	                .keys(['?'])
-	                .placement('top')
-	            )
-	            .append('a')
-	            .on('click', clickShortcuts);
+	var endpoint = 'https://en.wikipedia.org/w/api.php?';
+	var serviceWikipedia = {
+	  init: function init() {},
+	  reset: function reset() {},
+	  search: function search(lang, query, callback) {
+	    if (!query) {
+	      if (callback) callback('No Query', []);
+	      return;
+	    }
 
-	        shortcuts
-	            .append('div')
-	            .text(_t('shortcuts.title'));
+	    lang = lang || 'en';
+	    var url = endpoint.replace('en', lang) + utilQsString({
+	      action: 'query',
+	      list: 'search',
+	      srlimit: '10',
+	      srinfo: 'suggestion',
+	      format: 'json',
+	      origin: '*',
+	      srsearch: query
+	    });
+	    d3_json(url).then(function (result) {
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      } else if (!result || !result.query || !result.query.search) {
+	        throw new Error('No Results');
+	      }
 
-	        var walkthrough = toc
-	            .append('li')
-	            .attr('class', 'walkthrough')
-	            .append('a')
-	            .on('click', clickWalkthrough);
+	      if (callback) {
+	        var titles = result.query.search.map(function (d) {
+	          return d.title;
+	        });
+	        callback(null, titles);
+	      }
+	    })["catch"](function (err) {
+	      if (callback) callback(err, []);
+	    });
+	  },
+	  suggestions: function suggestions(lang, query, callback) {
+	    if (!query) {
+	      if (callback) callback('', []);
+	      return;
+	    }
 
-	        walkthrough
-	            .append('svg')
-	            .attr('class', 'logo logo-walkthrough')
-	            .append('use')
-	            .attr('xlink:href', '#iD-logo-walkthrough');
+	    lang = lang || 'en';
+	    var url = endpoint.replace('en', lang) + utilQsString({
+	      action: 'opensearch',
+	      namespace: 0,
+	      suggest: '',
+	      format: 'json',
+	      origin: '*',
+	      search: query
+	    });
+	    d3_json(url).then(function (result) {
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      } else if (!result || result.length < 2) {
+	        throw new Error('No Results');
+	      }
 
-	        walkthrough
-	            .append('div')
-	            .text(_t('splash.walkthrough'));
+	      if (callback) callback(null, result[1] || []);
+	    })["catch"](function (err) {
+	      if (callback) callback(err.message, []);
+	    });
+	  },
+	  translations: function translations(lang, title, callback) {
+	    if (!title) {
+	      if (callback) callback('No Title');
+	      return;
+	    }
 
+	    var url = endpoint.replace('en', lang) + utilQsString({
+	      action: 'query',
+	      prop: 'langlinks',
+	      format: 'json',
+	      origin: '*',
+	      lllimit: 500,
+	      titles: title
+	    });
+	    d3_json(url).then(function (result) {
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      } else if (!result || !result.query || !result.query.pages) {
+	        throw new Error('No Results');
+	      }
 
-	        var helpContent = content
-	            .append('div')
-	            .attr('class', 'left-content');
+	      if (callback) {
+	        var list = result.query.pages[Object.keys(result.query.pages)[0]];
+	        var translations = {};
 
-	        var body = helpContent
-	            .append('div')
-	            .attr('class', 'body');
+	        if (list && list.langlinks) {
+	          list.langlinks.forEach(function (d) {
+	            translations[d.lang] = d['*'];
+	          });
+	        }
 
-	        var nav = helpContent
-	            .append('div')
-	            .attr('class', 'nav');
+	        callback(null, translations);
+	      }
+	    })["catch"](function (err) {
+	      if (callback) callback(err.message);
+	    });
+	  }
+	};
 
-	        clickHelp(docs[0], 0);
+	var services = {
+	  geocoder: serviceNominatim,
+	  keepRight: serviceKeepRight,
+	  improveOSM: serviceImproveOSM,
+	  osmose: serviceOsmose,
+	  mapillary: serviceMapillary,
+	  nsi: serviceNsi,
+	  openstreetcam: serviceOpenstreetcam,
+	  osm: serviceOsm,
+	  osmWikibase: serviceOsmWikibase,
+	  maprules: serviceMapRules,
+	  streetside: serviceStreetside,
+	  taginfo: serviceTaginfo,
+	  vectorTile: serviceVectorTile,
+	  wikidata: serviceWikidata,
+	  wikipedia: serviceWikipedia
+	};
 
-	    };
+	function modeDragNote(context) {
+	  var mode = {
+	    id: 'drag-note',
+	    button: 'browse'
+	  };
+	  var edit = behaviorEdit(context);
 
-	    return helpPane;
-	}
+	  var _nudgeInterval;
 
-	function uiSectionValidationIssues(id, severity, context) {
+	  var _lastLoc;
 
-	    var _issues = [];
+	  var _note; // most current note.. dragged note may have stale datum.
 
-	    var section = uiSection(id, context)
-	        .title(function() {
-	            if (!_issues) { return ''; }
-	            var issueCountText = _issues.length > 1000 ? '1000+' : String(_issues.length);
-	            return _t('issues.' + severity + 's.list_title', { count: issueCountText });
-	        })
-	        .disclosureContent(renderDisclosureContent)
-	        .shouldDisplay(function() {
-	            return _issues && _issues.length;
-	        });
 
-	    function getOptions() {
-	        return {
-	            what: corePreferences('validate-what') || 'edited',
-	            where: corePreferences('validate-where') || 'all'
-	        };
-	    }
+	  function startNudge(d3_event, nudge) {
+	    if (_nudgeInterval) window.clearInterval(_nudgeInterval);
+	    _nudgeInterval = window.setInterval(function () {
+	      context.map().pan(nudge);
+	      doMove(d3_event, nudge);
+	    }, 50);
+	  }
 
-	    // get and cache the issues to display, unordered
-	    function reloadIssues() {
-	        _issues = context.validator().getIssuesBySeverity(getOptions())[severity];
+	  function stopNudge() {
+	    if (_nudgeInterval) {
+	      window.clearInterval(_nudgeInterval);
+	      _nudgeInterval = null;
 	    }
+	  }
 
-	    function renderDisclosureContent(selection) {
+	  function origin(note) {
+	    return context.projection(note.loc);
+	  }
 
-	        var center = context.map().center();
-	        var graph = context.graph();
+	  function start(d3_event, note) {
+	    _note = note;
+	    var osm = services.osm;
 
-	        // sort issues by distance away from the center of the map
-	        var issues = _issues.map(function withDistance(issue) {
-	                var extent = issue.extent(graph);
-	                var dist = extent ? geoSphericalDistance(center, extent.center()) : 0;
-	                return Object.assign(issue, { dist: dist });
-	            })
-	            .sort(function byDistance(a, b) {
-	                return a.dist - b.dist;
-	            });
+	    if (osm) {
+	      // Get latest note from cache.. The marker may have a stale datum bound to it
+	      // and dragging it around can sometimes delete the users note comment.
+	      _note = osm.getNote(_note.id);
+	    }
 
-	        // cut off at 1000
-	        issues = issues.slice(0, 1000);
+	    context.surface().selectAll('.note-' + _note.id).classed('active', true);
+	    context.perform(actionNoop());
+	    context.enter(mode);
+	    context.selectedNoteID(_note.id);
+	  }
 
-	        //renderIgnoredIssuesReset(_warningsSelection);
+	  function move(d3_event, entity, point) {
+	    d3_event.stopPropagation();
+	    _lastLoc = context.projection.invert(point);
+	    doMove(d3_event);
+	    var nudge = geoViewportEdge(point, context.map().dimensions());
 
-	        selection
-	            .call(drawIssuesList, issues);
+	    if (nudge) {
+	      startNudge(d3_event, nudge);
+	    } else {
+	      stopNudge();
 	    }
+	  }
 
-	    function drawIssuesList(selection, issues) {
-	        var list = selection.selectAll('.issues-list')
-	            .data([0]);
+	  function doMove(d3_event, nudge) {
+	    nudge = nudge || [0, 0];
+	    var currPoint = d3_event && d3_event.point || context.projection(_lastLoc);
+	    var currMouse = geoVecSubtract(currPoint, nudge);
+	    var loc = context.projection.invert(currMouse);
+	    _note = _note.move(loc);
+	    var osm = services.osm;
 
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list issues-list ' + severity + 's-list')
-	            .merge(list);
+	    if (osm) {
+	      osm.replaceNote(_note); // update note cache
+	    }
 
+	    context.replace(actionNoop()); // trigger redraw
+	  }
 
-	        var items = list.selectAll('li')
-	            .data(issues, function(d) { return d.id; });
+	  function end() {
+	    context.replace(actionNoop()); // trigger redraw
 
-	        // Exit
-	        items.exit()
-	            .remove();
+	    context.selectedNoteID(_note.id).enter(modeSelectNote(context, _note.id));
+	  }
 
-	        // Enter
-	        var itemsEnter = items.enter()
-	            .append('li')
-	            .attr('class', function (d) { return 'issue severity-' + d.severity; })
-	            .on('click', function(d) {
-	                context.validator().focusIssue(d);
-	            })
-	            .on('mouseover', function(d) {
-	                utilHighlightEntities(d.entityIds, true, context);
-	            })
-	            .on('mouseout', function(d) {
-	                utilHighlightEntities(d.entityIds, false, context);
-	            });
+	  var drag = behaviorDrag().selector('.layer-touch.markers .target.note.new').surface(context.container().select('.main-map').node()).origin(origin).on('start', start).on('move', move).on('end', end);
 
+	  mode.enter = function () {
+	    context.install(edit);
+	  };
 
-	        var labelsEnter = itemsEnter
-	            .append('div')
-	            .attr('class', 'issue-label');
-
-	        var textEnter = labelsEnter
-	            .append('span')
-	            .attr('class', 'issue-text');
-
-	        textEnter
-	            .append('span')
-	            .attr('class', 'issue-icon')
-	            .each(function(d) {
-	                var iconName = '#iD-icon-' + (d.severity === 'warning' ? 'alert' : 'error');
-	                select(this)
-	                    .call(svgIcon(iconName));
-	            });
+	  mode.exit = function () {
+	    context.ui().sidebar.hover.cancel();
+	    context.uninstall(edit);
+	    context.surface().selectAll('.active').classed('active', false);
+	    stopNudge();
+	  };
 
-	        textEnter
-	            .append('span')
-	            .attr('class', 'issue-message');
+	  mode.behavior = drag;
+	  return mode;
+	}
 
-	        /*
-	        labelsEnter
-	            .append('span')
-	            .attr('class', 'issue-autofix')
-	            .each(function(d) {
-	                if (!d.autoFix) return;
-
-	                d3_select(this)
-	                    .append('button')
-	                    .attr('title', t('issues.fix_one.title'))
-	                    .datum(d.autoFix)  // set button datum to the autofix
-	                    .attr('class', 'autofix action')
-	                    .on('click', function(d) {
-	                        d3_event.preventDefault();
-	                        d3_event.stopPropagation();
-
-	                        var issuesEntityIDs = d.issue.entityIds;
-	                        utilHighlightEntities(issuesEntityIDs.concat(d.entityIds), false, context);
-
-	                        context.perform.apply(context, d.autoArgs);
-	                        context.validator().validate();
-	                    })
-	                    .call(svgIcon('#iD-icon-wrench'));
-	            });
-	        */
+	function modeSelectData(context, selectedDatum) {
+	  var mode = {
+	    id: 'select-data',
+	    button: 'browse'
+	  };
+	  var keybinding = utilKeybinding('select-data');
+	  var dataEditor = uiDataEditor(context);
+	  var behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior]; // class the data as selected, or return to browse mode if the data is gone
 
-	        // Update
-	        items = items
-	            .merge(itemsEnter)
-	            .order();
+	  function selectData(d3_event, drawn) {
+	    var selection = context.surface().selectAll('.layer-mapdata .data' + selectedDatum.__featurehash__);
 
-	        items.selectAll('.issue-message')
-	            .text(function(d) {
-	                return d.message(context);
-	            });
+	    if (selection.empty()) {
+	      // Return to browse mode if selected DOM elements have
+	      // disappeared because the user moved them out of view..
+	      var source = d3_event && d3_event.type === 'zoom' && d3_event.sourceEvent;
 
-	        /*
-	        // autofix
-	        var canAutoFix = issues.filter(function(issue) { return issue.autoFix; });
-
-	        var autoFixAll = selection.selectAll('.autofix-all')
-	            .data(canAutoFix.length ? [0] : []);
-
-	        // exit
-	        autoFixAll.exit()
-	            .remove();
-
-	        // enter
-	        var autoFixAllEnter = autoFixAll.enter()
-	            .insert('div', '.issues-list')
-	            .attr('class', 'autofix-all');
-
-	        var linkEnter = autoFixAllEnter
-	            .append('a')
-	            .attr('class', 'autofix-all-link')
-	            .attr('href', '#');
-
-	        linkEnter
-	            .append('span')
-	            .attr('class', 'autofix-all-link-text')
-	            .text(t('issues.fix_all.title'));
-
-	        linkEnter
-	            .append('span')
-	            .attr('class', 'autofix-all-link-icon')
-	            .call(svgIcon('#iD-icon-wrench'));
-
-	        if (severity === 'warning') {
-	            renderIgnoredIssuesReset(selection);
-	        }
-
-	        // update
-	        autoFixAll = autoFixAll
-	            .merge(autoFixAllEnter);
-
-	        autoFixAll.selectAll('.autofix-all-link')
-	            .on('click', function() {
-	                context.pauseChangeDispatch();
-	                context.perform(actionNoop());
-	                canAutoFix.forEach(function(issue) {
-	                    var args = issue.autoFix.autoArgs.slice();  // copy
-	                    if (typeof args[args.length - 1] !== 'function') {
-	                        args.pop();
-	                    }
-	                    args.push(t('issues.fix_all.annotation'));
-	                    context.replace.apply(context, args);
-	                });
-	                context.resumeChangeDispatch();
-	                context.validator().validate();
-	            });
-	        */
+	      if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
+	        context.enter(modeBrowse(context));
+	      }
+	    } else {
+	      selection.classed('selected', true);
 	    }
+	  }
 
-	    context.validator().on('validated.uiSectionValidationIssues' + id, function() {
-	        window.requestIdleCallback(function() {
-	            reloadIssues();
-	            section.reRender();
-	        });
-	    });
+	  function esc() {
+	    if (context.container().select('.combobox').size()) return;
+	    context.enter(modeBrowse(context));
+	  }
 
-	    context.map().on('move.uiSectionValidationIssues' + id,
-	        debounce(function() {
-	            window.requestIdleCallback(function() {
-	                if (getOptions().where === 'visible') {
-	                    // must refetch issues if they are viewport-dependent
-	                    reloadIssues();
-	                }
-	                // always reload list to re-sort-by-distance
-	                section.reRender();
-	            });
-	        }, 1000)
-	    );
+	  mode.zoomToSelected = function () {
+	    var extent = geoExtent(d3_geoBounds(selectedDatum));
+	    context.map().centerZoomEase(extent.center(), context.map().trimmedExtentZoom(extent));
+	  };
 
-	    return section;
-	}
+	  mode.enter = function () {
+	    behaviors.forEach(context.install);
+	    keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);
+	    select(document).call(keybinding);
+	    selectData();
+	    var sidebar = context.ui().sidebar;
+	    sidebar.show(dataEditor.datum(selectedDatum)); // expand the sidebar, avoid obscuring the data if needed
 
-	function uiSectionValidationOptions(context) {
+	    var extent = geoExtent(d3_geoBounds(selectedDatum));
+	    sidebar.expand(sidebar.intersects(extent));
+	    context.map().on('drawn.select-data', selectData);
+	  };
 
-	    var section = uiSection('issues-options', context)
-	        .content(renderContent);
+	  mode.exit = function () {
+	    behaviors.forEach(context.uninstall);
+	    select(document).call(keybinding.unbind);
+	    context.surface().selectAll('.layer-mapdata .selected').classed('selected hover', false);
+	    context.map().on('drawn.select-data', null);
+	    context.ui().sidebar.hide();
+	  };
 
-	    function renderContent(selection) {
+	  return mode;
+	}
 
-	        var container = selection.selectAll('.issues-options-container')
-	            .data([0]);
+	function behaviorSelect(context) {
+	  var _tolerancePx = 4; // see also behaviorDrag
 
-	        container = container.enter()
-	            .append('div')
-	            .attr('class', 'issues-options-container')
-	            .merge(container);
+	  var _lastMouseEvent = null;
+	  var _showMenu = false;
+	  var _downPointers = {};
+	  var _longPressTimeout = null;
+	  var _lastInteractionType = null; // the id of the down pointer that's enabling multiselection while down
 
-	        var data = [
-	            { key: 'what', values: ['edited', 'all'] },
-	            { key: 'where', values: ['visible', 'all'] }
-	        ];
+	  var _multiselectionPointerId = null; // use pointer events on supported platforms; fallback to mouse events
 
-	        var options = container.selectAll('.issues-option')
-	            .data(data, function(d) { return d.key; });
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	        var optionsEnter = options.enter()
-	            .append('div')
-	            .attr('class', function(d) { return 'issues-option issues-option-' + d.key; });
+	  function keydown(d3_event) {
+	    if (d3_event.keyCode === 32) {
+	      // don't react to spacebar events during text input
+	      var activeNode = document.activeElement;
+	      if (activeNode && new Set(['INPUT', 'TEXTAREA']).has(activeNode.nodeName)) return;
+	    }
 
-	        optionsEnter
-	            .append('div')
-	            .attr('class', 'issues-option-title')
-	            .text(function(d) { return _t('issues.options.' + d.key + '.title'); });
+	    if (d3_event.keyCode === 93 || // context menu key
+	    d3_event.keyCode === 32) {
+	      // spacebar
+	      d3_event.preventDefault();
+	    }
 
-	        var valuesEnter = optionsEnter.selectAll('label')
-	            .data(function(d) {
-	                return d.values.map(function(val) { return { value: val, key: d.key }; });
-	            })
-	            .enter()
-	            .append('label');
+	    if (d3_event.repeat) return; // ignore repeated events for held keys
+	    // if any key is pressed the user is probably doing something other than long-pressing
 
-	        valuesEnter
-	            .append('input')
-	            .attr('type', 'radio')
-	            .attr('name', function(d) { return 'issues-option-' + d.key; })
-	            .attr('value', function(d) { return d.value; })
-	            .property('checked', function(d) { return getOptions()[d.key] === d.value; })
-	            .on('change', function(d) { updateOptionValue(d.key, d.value); });
+	    cancelLongPress();
 
-	        valuesEnter
-	            .append('span')
-	            .text(function(d) { return _t('issues.options.' + d.key + '.' + d.value); });
+	    if (d3_event.shiftKey) {
+	      context.surface().classed('behavior-multiselect', true);
 	    }
 
-	    function getOptions() {
-	        return {
-	            what: corePreferences('validate-what') || 'edited',  // 'all', 'edited'
-	            where: corePreferences('validate-where') || 'all'    // 'all', 'visible'
+	    if (d3_event.keyCode === 32) {
+	      // spacebar
+	      if (!_downPointers.spacebar && _lastMouseEvent) {
+	        cancelLongPress();
+	        _longPressTimeout = window.setTimeout(didLongPress, 500, 'spacebar', 'spacebar');
+	        _downPointers.spacebar = {
+	          firstEvent: _lastMouseEvent,
+	          lastEvent: _lastMouseEvent
 	        };
+	      }
 	    }
+	  }
 
-	    function updateOptionValue(d, val) {
-	        if (!val && event && event.target) {
-	            val = event.target.value;
-	        }
-
-	        corePreferences('validate-' + d, val);
-	        context.validator().validate();
-	    }
-
-	    return section;
-	}
-
-	function uiSectionValidationRules(context) {
-
-	    var MINSQUARE = 0;
-	    var MAXSQUARE = 20;
-	    var DEFAULTSQUARE = 5;  // see also unsquare_way.js
-
-	    var section = uiSection('issues-rules', context)
-	        .disclosureContent(renderDisclosureContent)
-	        .title(_t('issues.rules.title'));
-
-	    var _ruleKeys = context.validator().getRuleKeys()
-	        .filter(function(key) { return key !== 'maprules'; })
-	        .sort(function(key1, key2) {
-	            // alphabetize by localized title
-	            return _t('issues.' + key1 + '.title') < _t('issues.' + key2 + '.title') ? -1 : 1;
-	        });
-
-	    function renderDisclosureContent(selection) {
-	        var container = selection.selectAll('.issues-rulelist-container')
-	            .data([0]);
-
-	        var containerEnter = container.enter()
-	            .append('div')
-	            .attr('class', 'issues-rulelist-container');
-
-	        containerEnter
-	            .append('ul')
-	            .attr('class', 'layer-list issue-rules-list');
-
-	        var ruleLinks = containerEnter
-	            .append('div')
-	            .attr('class', 'issue-rules-links section-footer');
-
-	        ruleLinks
-	            .append('a')
-	            .attr('class', 'issue-rules-link')
-	            .attr('href', '#')
-	            .text(_t('issues.enable_all'))
-	            .on('click', function() {
-	                context.validator().disableRules([]);
-	            });
-
-	        ruleLinks
-	            .append('a')
-	            .attr('class', 'issue-rules-link')
-	            .attr('href', '#')
-	            .text(_t('issues.disable_all'))
-	            .on('click', function() {
-	                context.validator().disableRules(_ruleKeys);
-	            });
-
-
-	        // Update
-	        container = container
-	            .merge(containerEnter);
+	  function keyup(d3_event) {
+	    cancelLongPress();
 
-	        container.selectAll('.issue-rules-list')
-	            .call(drawListItems, _ruleKeys, 'checkbox', 'rule', toggleRule, isRuleEnabled);
+	    if (!d3_event.shiftKey) {
+	      context.surface().classed('behavior-multiselect', false);
 	    }
 
-	    function drawListItems(selection, data, type, name, change, active) {
-	        var items = selection.selectAll('li')
-	            .data(data);
-
-	        // Exit
-	        items.exit()
-	            .remove();
-
-	        // Enter
-	        var enter = items.enter()
-	            .append('li');
-
-	        if (name === 'rule') {
-	            enter
-	                .call(uiTooltip()
-	                    .title(function(d) { return _t('issues.' + d + '.tip'); })
-	                    .placement('top')
-	                );
-	        }
-
-	        var label = enter
-	            .append('label');
-
-	        label
-	            .append('input')
-	            .attr('type', type)
-	            .attr('name', name)
-	            .on('change', change);
-
-	        label
-	            .append('span')
-	            .html(function(d) {
-	                var params = {};
-	                if (d === 'unsquare_way') {
-	                    params.val = '<span class="square-degrees"></span>';
-	                }
-	                return _t('issues.' + d + '.title', params);
-	            });
+	    if (d3_event.keyCode === 93) {
+	      // context menu key
+	      d3_event.preventDefault();
+	      _lastInteractionType = 'menukey';
+	      contextmenu(d3_event);
+	    } else if (d3_event.keyCode === 32) {
+	      // spacebar
+	      var pointer = _downPointers.spacebar;
 
-	        // Update
-	        items = items
-	            .merge(enter);
-
-	        items
-	            .classed('active', active)
-	            .selectAll('input')
-	            .property('checked', active)
-	            .property('indeterminate', false);
-
-
-	        // user-configurable square threshold
-	        var degStr = corePreferences('validate-square-degrees');
-	        if (degStr === null) {
-	            degStr = '' + DEFAULTSQUARE;
-	        }
-
-	        var span = items.selectAll('.square-degrees');
-	        var input = span.selectAll('.square-degrees-input')
-	            .data([0]);
-
-	        // enter / update
-	        input.enter()
-	            .append('input')
-	            .attr('type', 'number')
-	            .attr('min', '' + MINSQUARE)
-	            .attr('max', '' + MAXSQUARE)
-	            .attr('step', '0.5')
-	            .attr('class', 'square-degrees-input')
-	            .call(utilNoAuto)
-	            .on('click', function () {
-	                event.preventDefault();
-	                event.stopPropagation();
-	                this.select();
-	            })
-	            .on('keyup', function () {
-	                if (event.keyCode === 13) { // enter
-	                    this.blur();
-	                    this.select();
-	                }
-	            })
-	            .on('blur', changeSquare)
-	            .merge(input)
-	            .property('value', degStr);
+	      if (pointer) {
+	        delete _downPointers.spacebar;
+	        if (pointer.done) return;
+	        d3_event.preventDefault();
+	        _lastInteractionType = 'spacebar';
+	        click(pointer.firstEvent, pointer.lastEvent, 'spacebar');
+	      }
 	    }
+	  }
 
-	    function changeSquare() {
-	        var input = select(this);
-	        var degStr = utilGetSetValue(input).trim();
-	        var degNum = parseFloat(degStr, 10);
+	  function pointerdown(d3_event) {
+	    var id = (d3_event.pointerId || 'mouse').toString();
+	    cancelLongPress();
+	    if (d3_event.buttons && d3_event.buttons !== 1) return;
+	    context.ui().closeEditMenu();
+	    _longPressTimeout = window.setTimeout(didLongPress, 500, id, 'longdown-' + (d3_event.pointerType || 'mouse'));
+	    _downPointers[id] = {
+	      firstEvent: d3_event,
+	      lastEvent: d3_event
+	    };
+	  }
 
-	        if (!isFinite(degNum)) {
-	            degNum = DEFAULTSQUARE;
-	        } else if (degNum > MAXSQUARE) {
-	            degNum = MAXSQUARE;
-	        } else if (degNum < MINSQUARE) {
-	            degNum = MINSQUARE;
-	        }
+	  function didLongPress(id, interactionType) {
+	    var pointer = _downPointers[id];
+	    if (!pointer) return;
 
-	        degNum = Math.round(degNum * 10 ) / 10;   // round to 1 decimal
-	        degStr = '' + degNum;
+	    for (var i in _downPointers) {
+	      // don't allow this or any currently down pointer to trigger another click
+	      _downPointers[i].done = true;
+	    } // treat long presses like right-clicks
 
-	        input
-	            .property('value', degStr);
 
-	        corePreferences('validate-square-degrees', degStr);
-	        context.validator().reloadUnsquareIssues();
-	    }
+	    _longPressTimeout = null;
+	    _lastInteractionType = interactionType;
+	    _showMenu = true;
+	    click(pointer.firstEvent, pointer.lastEvent, id);
+	  }
 
-	    function isRuleEnabled(d) {
-	        return context.validator().isRuleEnabled(d);
-	    }
+	  function pointermove(d3_event) {
+	    var id = (d3_event.pointerId || 'mouse').toString();
 
-	    function toggleRule(d) {
-	        context.validator().toggleRule(d);
+	    if (_downPointers[id]) {
+	      _downPointers[id].lastEvent = d3_event;
 	    }
 
-	    context.validator().on('validated.uiSectionValidationRules', function() {
-	        window.requestIdleCallback(section.reRender);
-	    });
-
-	    return section;
-	}
+	    if (!d3_event.pointerType || d3_event.pointerType === 'mouse') {
+	      _lastMouseEvent = d3_event;
 
-	function uiSectionValidationStatus(context) {
+	      if (_downPointers.spacebar) {
+	        _downPointers.spacebar.lastEvent = d3_event;
+	      }
+	    }
+	  }
 
-	    var section = uiSection('issues-status', context)
-	        .content(renderContent)
-	        .shouldDisplay(function() {
-	            var issues = context.validator().getIssues(getOptions());
-	            return issues.length === 0;
-	        });
+	  function pointerup(d3_event) {
+	    var id = (d3_event.pointerId || 'mouse').toString();
+	    var pointer = _downPointers[id];
+	    if (!pointer) return;
+	    delete _downPointers[id];
 
-	    function getOptions() {
-	        return {
-	            what: corePreferences('validate-what') || 'edited',
-	            where: corePreferences('validate-where') || 'all'
-	        };
+	    if (_multiselectionPointerId === id) {
+	      _multiselectionPointerId = null;
 	    }
 
-	    function renderContent(selection) {
+	    if (pointer.done) return;
+	    click(pointer.firstEvent, d3_event, id);
+	  }
 
-	        var box = selection.selectAll('.box')
-	            .data([0]);
+	  function pointercancel(d3_event) {
+	    var id = (d3_event.pointerId || 'mouse').toString();
+	    if (!_downPointers[id]) return;
+	    delete _downPointers[id];
 
-	        var boxEnter = box.enter()
-	            .append('div')
-	            .attr('class', 'box');
+	    if (_multiselectionPointerId === id) {
+	      _multiselectionPointerId = null;
+	    }
+	  }
 
-	        boxEnter
-	            .append('div')
-	            .call(svgIcon('#iD-icon-apply', 'pre-text'));
+	  function contextmenu(d3_event) {
+	    d3_event.preventDefault();
 
-	        var noIssuesMessage = boxEnter
-	            .append('span');
+	    if (!+d3_event.clientX && !+d3_event.clientY) {
+	      if (_lastMouseEvent) {
+	        d3_event.sourceEvent = _lastMouseEvent;
+	      } else {
+	        return;
+	      }
+	    } else {
+	      _lastMouseEvent = d3_event;
+	      _lastInteractionType = 'rightclick';
+	    }
 
-	        noIssuesMessage
-	            .append('strong')
-	            .attr('class', 'message');
+	    _showMenu = true;
+	    click(d3_event, d3_event);
+	  }
 
-	        noIssuesMessage
-	            .append('br');
+	  function click(firstEvent, lastEvent, pointerId) {
+	    cancelLongPress();
+	    var mapNode = context.container().select('.main-map').node(); // Use the `main-map` coordinate system since the surface and supersurface
+	    // are transformed when drag-panning.
 
-	        noIssuesMessage
-	            .append('span')
-	            .attr('class', 'details');
+	    var pointGetter = utilFastMouse(mapNode);
+	    var p1 = pointGetter(firstEvent);
+	    var p2 = pointGetter(lastEvent);
+	    var dist = geoVecLength(p1, p2);
 
-	        renderIgnoredIssuesReset(selection);
-	        setNoIssuesText(selection);
+	    if (dist > _tolerancePx || !mapContains(lastEvent)) {
+	      resetProperties();
+	      return;
 	    }
 
-	    function renderIgnoredIssuesReset(selection) {
-
-	        var ignoredIssues = context.validator()
-	            .getIssues({ what: 'all', where: 'all', includeDisabledRules: true, includeIgnored: 'only' });
+	    var targetDatum = lastEvent.target.__data__;
+	    var multiselectEntityId;
 
-	        var resetIgnored = selection.selectAll('.reset-ignored')
-	            .data(ignoredIssues.length ? [0] : []);
+	    if (!_multiselectionPointerId) {
+	      // If a different pointer than the one triggering this click is down on a
+	      // feature, treat this and all future clicks as multiselection until that
+	      // pointer is raised.
+	      var selectPointerInfo = pointerDownOnSelection(pointerId);
 
-	        // exit
-	        resetIgnored.exit()
-	            .remove();
+	      if (selectPointerInfo) {
+	        _multiselectionPointerId = selectPointerInfo.pointerId; // if the other feature isn't selected yet, make sure we select it
 
-	        // enter
-	        var resetIgnoredEnter = resetIgnored.enter()
-	            .append('div')
-	            .attr('class', 'reset-ignored section-footer');
+	        multiselectEntityId = !selectPointerInfo.selected && selectPointerInfo.entityId;
+	        _downPointers[selectPointerInfo.pointerId].done = true;
+	      }
+	    } // support multiselect if data is already selected
 
-	        resetIgnoredEnter
-	            .append('a')
-	            .attr('href', '#');
 
-	        // update
-	        resetIgnored = resetIgnored
-	            .merge(resetIgnoredEnter);
+	    var isMultiselect = context.mode().id === 'select' && ( // and shift key is down
+	    lastEvent && lastEvent.shiftKey || // or we're lasso-selecting
+	    context.surface().select('.lasso').node() || // or a pointer is down over a selected feature
+	    _multiselectionPointerId && !multiselectEntityId);
 
-	        resetIgnored.select('a')
-	            .text(_t('issues.reset_ignored', { count: ignoredIssues.length.toString() }));
+	    processClick(targetDatum, isMultiselect, p2, multiselectEntityId);
 
-	        resetIgnored.on('click', function() {
-	            context.validator().resetIgnoredIssues();
-	        });
+	    function mapContains(event) {
+	      var rect = mapNode.getBoundingClientRect();
+	      return event.clientX >= rect.left && event.clientX <= rect.right && event.clientY >= rect.top && event.clientY <= rect.bottom;
 	    }
 
-	    function setNoIssuesText(selection) {
+	    function pointerDownOnSelection(skipPointerId) {
+	      var mode = context.mode();
+	      var selectedIDs = mode.id === 'select' ? mode.selectedIDs() : [];
 
-	        var opts = getOptions();
+	      for (var pointerId in _downPointers) {
+	        if (pointerId === 'spacebar' || pointerId === skipPointerId) continue;
+	        var pointerInfo = _downPointers[pointerId];
+	        var p1 = pointGetter(pointerInfo.firstEvent);
+	        var p2 = pointGetter(pointerInfo.lastEvent);
+	        if (geoVecLength(p1, p2) > _tolerancePx) continue;
+	        var datum = pointerInfo.firstEvent.target.__data__;
+	        var entity = datum && datum.properties && datum.properties.entity || datum;
 
-	        function checkForHiddenIssues(cases) {
-	            for (var type in cases) {
-	                var hiddenOpts = cases[type];
-	                var hiddenIssues = context.validator().getIssues(hiddenOpts);
-	                if (hiddenIssues.length) {
-	                    selection.select('.box .details')
-	                        .text(_t(
-	                            'issues.no_issues.hidden_issues.' + type,
-	                            { count: hiddenIssues.length.toString() }
-	                        ));
-	                    return;
-	                }
-	            }
-	            selection.select('.box .details')
-	                .text(_t('issues.no_issues.hidden_issues.none'));
+	        if (context.graph().hasEntity(entity.id)) {
+	          return {
+	            pointerId: pointerId,
+	            entityId: entity.id,
+	            selected: selectedIDs.indexOf(entity.id) !== -1
+	          };
 	        }
+	      }
 
-	        var messageType;
+	      return null;
+	    }
+	  }
 
-	        if (opts.what === 'edited' && opts.where === 'visible') {
+	  function processClick(datum, isMultiselect, point, alsoSelectId) {
+	    var mode = context.mode();
+	    var showMenu = _showMenu;
+	    var interactionType = _lastInteractionType;
+	    var entity = datum && datum.properties && datum.properties.entity;
+	    if (entity) datum = entity;
 
-	            messageType = 'edits_in_view';
+	    if (datum && datum.type === 'midpoint') {
+	      // treat targeting midpoints as if targeting the parent way
+	      datum = datum.parents[0];
+	    }
 
-	            checkForHiddenIssues({
-	                elsewhere: { what: 'edited', where: 'all' },
-	                everything_else: { what: 'all', where: 'visible' },
-	                disabled_rules: { what: 'edited', where: 'visible', includeDisabledRules: 'only' },
-	                everything_else_elsewhere: { what: 'all', where: 'all' },
-	                disabled_rules_elsewhere: { what: 'edited', where: 'all', includeDisabledRules: 'only' },
-	                ignored_issues: { what: 'edited', where: 'visible', includeIgnored: 'only' },
-	                ignored_issues_elsewhere: { what: 'edited', where: 'all', includeIgnored: 'only' }
-	            });
+	    var newMode;
 
-	        } else if (opts.what === 'edited' && opts.where === 'all') {
+	    if (datum instanceof osmEntity) {
+	      // targeting an entity
+	      var selectedIDs = context.selectedIDs();
+	      context.selectedNoteID(null);
+	      context.selectedErrorID(null);
 
-	            messageType = 'edits';
+	      if (!isMultiselect) {
+	        // don't change the selection if we're toggling the menu atop a multiselection
+	        if (!showMenu || selectedIDs.length <= 1 || selectedIDs.indexOf(datum.id) === -1) {
+	          if (alsoSelectId === datum.id) alsoSelectId = null;
+	          selectedIDs = (alsoSelectId ? [alsoSelectId] : []).concat([datum.id]); // always enter modeSelect even if the entity is already
+	          // selected since listeners may expect `context.enter` events,
+	          // e.g. in the walkthrough
 
-	            checkForHiddenIssues({
-	                everything_else: { what: 'all', where: 'all' },
-	                disabled_rules: { what: 'edited', where: 'all', includeDisabledRules: 'only' },
-	                ignored_issues: { what: 'edited', where: 'all', includeIgnored: 'only' }
+	          newMode = mode.id === 'select' ? mode.selectedIDs(selectedIDs) : modeSelect(context, selectedIDs).selectBehavior(behavior);
+	          context.enter(newMode);
+	        }
+	      } else {
+	        if (selectedIDs.indexOf(datum.id) !== -1) {
+	          // clicked entity is already in the selectedIDs list..
+	          if (!showMenu) {
+	            // deselect clicked entity, then reenter select mode or return to browse mode..
+	            selectedIDs = selectedIDs.filter(function (id) {
+	              return id !== datum.id;
 	            });
+	            newMode = selectedIDs.length ? mode.selectedIDs(selectedIDs) : modeBrowse(context).selectBehavior(behavior);
+	            context.enter(newMode);
+	          }
+	        } else {
+	          // clicked entity is not in the selected list, add it..
+	          selectedIDs = selectedIDs.concat([datum.id]);
+	          newMode = mode.selectedIDs(selectedIDs);
+	          context.enter(newMode);
+	        }
+	      }
+	    } else if (datum && datum.__featurehash__ && !isMultiselect) {
+	      // targeting custom data
+	      context.selectedNoteID(null).enter(modeSelectData(context, datum));
+	    } else if (datum instanceof osmNote && !isMultiselect) {
+	      // targeting a note
+	      context.selectedNoteID(datum.id).enter(modeSelectNote(context, datum.id));
+	    } else if (datum instanceof QAItem & !isMultiselect) {
+	      // targeting an external QA issue
+	      context.selectedErrorID(datum.id).enter(modeSelectError(context, datum.id, datum.service));
+	    } else {
+	      // targeting nothing
+	      context.selectedNoteID(null);
+	      context.selectedErrorID(null);
 
-	        } else if (opts.what === 'all' && opts.where === 'visible') {
-
-	            messageType = 'everything_in_view';
-
-	            checkForHiddenIssues({
-	                elsewhere: { what: 'all', where: 'all' },
-	                disabled_rules: { what: 'all', where: 'visible', includeDisabledRules: 'only' },
-	                disabled_rules_elsewhere: { what: 'all', where: 'all', includeDisabledRules: 'only' },
-	                ignored_issues: { what: 'all', where: 'visible', includeIgnored: 'only' },
-	                ignored_issues_elsewhere: { what: 'all', where: 'all', includeIgnored: 'only' }
-	            });
-	        } else if (opts.what === 'all' && opts.where === 'all') {
+	      if (!isMultiselect && mode.id !== 'browse') {
+	        context.enter(modeBrowse(context));
+	      }
+	    }
 
-	            messageType = 'everything';
+	    context.ui().closeEditMenu(); // always request to show the edit menu in case the mode needs it
 
-	            checkForHiddenIssues({
-	                disabled_rules: { what: 'all', where: 'all', includeDisabledRules: 'only' },
-	                ignored_issues: { what: 'all', where: 'all', includeIgnored: 'only' }
-	            });
-	        }
+	    if (showMenu) context.ui().showEditMenu(point, interactionType);
+	    resetProperties();
+	  }
 
-	        if (opts.what === 'edited' && context.history().difference().summary().length === 0) {
-	            messageType = 'no_edits';
-	        }
+	  function cancelLongPress() {
+	    if (_longPressTimeout) window.clearTimeout(_longPressTimeout);
+	    _longPressTimeout = null;
+	  }
 
-	        selection.select('.box .message')
-	            .text(_t('issues.no_issues.message.' + messageType));
+	  function resetProperties() {
+	    cancelLongPress();
+	    _showMenu = false;
+	    _lastInteractionType = null; // don't reset _lastMouseEvent since it might still be useful
+	  }
 
-	    }
+	  function behavior(selection) {
+	    resetProperties();
+	    _lastMouseEvent = context.map().lastPointerEvent();
+	    select(window).on('keydown.select', keydown).on('keyup.select', keyup).on(_pointerPrefix + 'move.select', pointermove, true).on(_pointerPrefix + 'up.select', pointerup, true).on('pointercancel.select', pointercancel, true).on('contextmenu.select-window', function (d3_event) {
+	      // Edge and IE really like to show the contextmenu on the
+	      // menubar when user presses a keyboard menu button
+	      // even after we've already preventdefaulted the key event.
+	      var e = d3_event;
 
-	    context.validator().on('validated.uiSectionValidationStatus', function() {
-	        window.requestIdleCallback(section.reRender);
+	      if (+e.clientX === 0 && +e.clientY === 0) {
+	        d3_event.preventDefault();
+	      }
 	    });
+	    selection.on(_pointerPrefix + 'down.select', pointerdown).on('contextmenu.select', contextmenu);
+	    /*if (d3_event && d3_event.shiftKey) {
+	        context.surface()
+	            .classed('behavior-multiselect', true);
+	    }*/
+	  }
 
-	    context.map().on('move.uiSectionValidationStatus',
-	        debounce(function() {
-	            window.requestIdleCallback(section.reRender);
-	        }, 1000)
-	    );
+	  behavior.off = function (selection) {
+	    cancelLongPress();
+	    select(window).on('keydown.select', null).on('keyup.select', null).on('contextmenu.select-window', null).on(_pointerPrefix + 'move.select', null, true).on(_pointerPrefix + 'up.select', null, true).on('pointercancel.select', null, true);
+	    selection.on(_pointerPrefix + 'down.select', null).on('contextmenu.select', null);
+	    context.surface().classed('behavior-multiselect', false);
+	  };
 
-	    return section;
+	  return behavior;
 	}
 
-	function uiPaneIssues(context) {
-
-	    var issuesPane = uiPane('issues', context)
-	        .key(_t('issues.key'))
-	        .title(_t('issues.title'))
-	        .description(_t('issues.title'))
-	        .iconName('iD-icon-alert')
-	        .sections([
-	            uiSectionValidationOptions(context),
-	            uiSectionValidationStatus(context),
-	            uiSectionValidationIssues('issues-errors', 'error', context),
-	            uiSectionValidationIssues('issues-warnings', 'warning', context),
-	            uiSectionValidationRules(context)
-	        ]);
+	function operationContinue(context, selectedIDs) {
+	  var _entities = selectedIDs.map(function (id) {
+	    return context.graph().entity(id);
+	  });
 
-	    return issuesPane;
-	}
+	  var _geometries = Object.assign({
+	    line: [],
+	    vertex: []
+	  }, utilArrayGroupBy(_entities, function (entity) {
+	    return entity.geometry(context.graph());
+	  }));
 
-	function uiSettingsCustomData(context) {
-	    var dispatch$1 = dispatch('change');
+	  var _vertex = _geometries.vertex.length && _geometries.vertex[0];
 
-	    function render(selection) {
-	        var dataLayer = context.layers().layer('data');
+	  function candidateWays() {
+	    return _vertex ? context.graph().parentWays(_vertex).filter(function (parent) {
+	      return parent.geometry(context.graph()) === 'line' && !parent.isClosed() && parent.affix(_vertex.id) && (_geometries.line.length === 0 || _geometries.line[0] === parent);
+	    }) : [];
+	  }
 
-	        // keep separate copies of original and current settings
-	        var _origSettings = {
-	            fileList: (dataLayer && dataLayer.fileList()) || null,
-	            url: corePreferences('settings-custom-data-url')
-	        };
-	        var _currSettings = {
-	            fileList: (dataLayer && dataLayer.fileList()) || null,
-	            url: corePreferences('settings-custom-data-url')
-	        };
+	  var _candidates = candidateWays();
 
-	        // var example = 'https://{switch:a,b,c}.tile.openstreetmap.org/{zoom}/{x}/{y}.png';
-	        var modal = uiConfirm(selection).okButton();
+	  var operation = function operation() {
+	    var candidate = _candidates[0];
+	    context.enter(modeDrawLine(context, candidate.id, context.graph(), 'line', candidate.affix(_vertex.id), true));
+	  };
 
-	        modal
-	            .classed('settings-modal settings-custom-data', true);
+	  operation.relatedEntityIds = function () {
+	    return _candidates.length ? [_candidates[0].id] : [];
+	  };
 
-	        modal.select('.modal-section.header')
-	            .append('h3')
-	            .text(_t('settings.custom_data.header'));
+	  operation.available = function () {
+	    return _geometries.vertex.length === 1 && _geometries.line.length <= 1 && !context.features().hasHiddenConnections(_vertex, context.graph());
+	  };
 
+	  operation.disabled = function () {
+	    if (_candidates.length === 0) {
+	      return 'not_eligible';
+	    } else if (_candidates.length > 1) {
+	      return 'multiple';
+	    }
 
-	        var textSection = modal.select('.modal-section.message-text');
+	    return false;
+	  };
 
-	        textSection
-	            .append('pre')
-	            .attr('class', 'instructions-file')
-	            .text(_t('settings.custom_data.file.instructions'));
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.continue.' + disable) : _t('operations.continue.description');
+	  };
 
-	        textSection
-	            .append('input')
-	            .attr('class', 'field-file')
-	            .attr('type', 'file')
-	            .property('files', _currSettings.fileList)  // works for all except IE11
-	            .on('change', function() {
-	                var files = event.target.files;
-	                if (files && files.length) {
-	                    _currSettings.url = '';
-	                    textSection.select('.field-url').property('value', '');
-	                    _currSettings.fileList = files;
-	                } else {
-	                    _currSettings.fileList = null;
-	                }
-	            });
+	  operation.annotation = function () {
+	    return _t('operations.continue.annotation.line');
+	  };
 
-	        textSection
-	            .append('h4')
-	            .text(_t('settings.custom_data.or'));
+	  operation.id = 'continue';
+	  operation.keys = [_t('operations.continue.key')];
+	  operation.title = _t('operations.continue.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	        textSection
-	            .append('pre')
-	            .attr('class', 'instructions-url')
-	            .text(_t('settings.custom_data.url.instructions'));
+	function operationCopy(context, selectedIDs) {
+	  function getFilteredIdsToCopy() {
+	    return selectedIDs.filter(function (selectedID) {
+	      var entity = context.graph().hasEntity(selectedID); // don't copy untagged vertices separately from ways
 
-	        textSection
-	            .append('textarea')
-	            .attr('class', 'field-url')
-	            .attr('placeholder', _t('settings.custom_data.url.placeholder'))
-	            .call(utilNoAuto)
-	            .property('value', _currSettings.url);
+	      return entity.hasInterestingTags() || entity.geometry(context.graph()) !== 'vertex';
+	    });
+	  }
 
+	  var operation = function operation() {
+	    var graph = context.graph();
+	    var selected = groupEntities(getFilteredIdsToCopy(), graph);
+	    var canCopy = [];
+	    var skip = {};
+	    var entity;
+	    var i;
 
-	        // insert a cancel button
-	        var buttonSection = modal.select('.modal-section.buttons');
+	    for (i = 0; i < selected.relation.length; i++) {
+	      entity = selected.relation[i];
 
-	        buttonSection
-	            .insert('button', '.ok-button')
-	            .attr('class', 'button cancel-button secondary-action')
-	            .text(_t('confirm.cancel'));
+	      if (!skip[entity.id] && entity.isComplete(graph)) {
+	        canCopy.push(entity.id);
+	        skip = getDescendants(entity.id, graph, skip);
+	      }
+	    }
 
+	    for (i = 0; i < selected.way.length; i++) {
+	      entity = selected.way[i];
 
-	        buttonSection.select('.cancel-button')
-	            .on('click.cancel', clickCancel);
+	      if (!skip[entity.id]) {
+	        canCopy.push(entity.id);
+	        skip = getDescendants(entity.id, graph, skip);
+	      }
+	    }
 
-	        buttonSection.select('.ok-button')
-	            .attr('disabled', isSaveDisabled)
-	            .on('click.save', clickSave);
+	    for (i = 0; i < selected.node.length; i++) {
+	      entity = selected.node[i];
 
+	      if (!skip[entity.id]) {
+	        canCopy.push(entity.id);
+	      }
+	    }
 
-	        function isSaveDisabled() {
-	            return null;
-	        }
+	    context.copyIDs(canCopy);
 
+	    if (_point && (canCopy.length !== 1 || graph.entity(canCopy[0]).type !== 'node')) {
+	      // store the anchor coordinates if copying more than a single node
+	      context.copyLonLat(context.projection.invert(_point));
+	    } else {
+	      context.copyLonLat(null);
+	    }
+	  };
 
-	        // restore the original url
-	        function clickCancel() {
-	            textSection.select('.field-url').property('value', _origSettings.url);
-	            corePreferences('settings-custom-data-url', _origSettings.url);
-	            this.blur();
-	            modal.close();
-	        }
+	  function groupEntities(ids, graph) {
+	    var entities = ids.map(function (id) {
+	      return graph.entity(id);
+	    });
+	    return Object.assign({
+	      relation: [],
+	      way: [],
+	      node: []
+	    }, utilArrayGroupBy(entities, 'type'));
+	  }
 
-	        // accept the current url
-	        function clickSave() {
-	            _currSettings.url = textSection.select('.field-url').property('value').trim();
+	  function getDescendants(id, graph, descendants) {
+	    var entity = graph.entity(id);
+	    var children;
+	    descendants = descendants || {};
 
-	            // one or the other but not both
-	            if (_currSettings.url) { _currSettings.fileList = null; }
-	            if (_currSettings.fileList) { _currSettings.url = ''; }
+	    if (entity.type === 'relation') {
+	      children = entity.members.map(function (m) {
+	        return m.id;
+	      });
+	    } else if (entity.type === 'way') {
+	      children = entity.nodes;
+	    } else {
+	      children = [];
+	    }
 
-	            corePreferences('settings-custom-data-url', _currSettings.url);
-	            this.blur();
-	            modal.close();
-	            dispatch$1.call('change', this, _currSettings);
-	        }
+	    for (var i = 0; i < children.length; i++) {
+	      if (!descendants[children[i]]) {
+	        descendants[children[i]] = true;
+	        descendants = getDescendants(children[i], graph, descendants);
+	      }
 	    }
 
-	    return utilRebind(render, dispatch$1, 'on');
-	}
+	    return descendants;
+	  }
 
-	function uiSectionDataLayers(context) {
+	  operation.available = function () {
+	    return getFilteredIdsToCopy().length > 0;
+	  };
 
-	    var settingsCustomData = uiSettingsCustomData(context)
-	        .on('change', customChanged);
+	  operation.disabled = function () {
+	    var extent = utilTotalExtent(getFilteredIdsToCopy(), context.graph());
 
-	    var layers = context.layers();
+	    if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    }
 
-	    var section = uiSection('data-layers', context)
-	        .title(_t('map_data.data_layers'))
-	        .disclosureContent(renderDisclosureContent);
+	    return false;
+	  };
 
-	    function renderDisclosureContent(selection) {
-	        var container = selection.selectAll('.data-layer-container')
-	            .data([0]);
+	  operation.availableForKeypress = function () {
+	    var selection = window.getSelection && window.getSelection(); // if the user has text selected then let them copy that, not the selected feature
 
-	        container.enter()
-	            .append('div')
-	            .attr('class', 'data-layer-container')
-	            .merge(container)
-	            .call(drawOsmItems)
-	            .call(drawQAItems)
-	            .call(drawCustomDataItems)
-	            .call(drawVectorItems)      // Beta - Detroit mapping challenge
-	            .call(drawPanelItems);
-	    }
+	    return !selection || !selection.toString();
+	  };
 
-	    function showsLayer(which) {
-	        var layer = layers.layer(which);
-	        if (layer) {
-	            return layer.enabled();
-	        }
-	        return false;
-	    }
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.copy.' + disable, {
+	      n: selectedIDs.length
+	    }) : _t('operations.copy.description', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	    function setLayer(which, enabled) {
-	        // Don't allow layer changes while drawing - #6584
-	        var mode = context.mode();
-	        if (mode && /^draw/.test(mode.id)) { return; }
+	  operation.annotation = function () {
+	    return _t('operations.copy.annotation', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	        var layer = layers.layer(which);
-	        if (layer) {
-	            layer.enabled(enabled);
+	  var _point;
 
-	            if (!enabled && (which === 'osm' || which === 'notes')) {
-	                context.enter(modeBrowse(context));
-	            }
-	        }
-	    }
+	  operation.point = function (val) {
+	    _point = val;
+	    return operation;
+	  };
 
-	    function toggleLayer(which) {
-	        setLayer(which, !showsLayer(which));
-	    }
+	  operation.id = 'copy';
+	  operation.keys = [uiCmd('⌘C')];
+	  operation.title = _t('operations.copy.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	    function drawOsmItems(selection) {
-	        var osmKeys = ['osm', 'notes'];
-	        var osmLayers = layers.all().filter(function(obj) { return osmKeys.indexOf(obj.id) !== -1; });
+	function operationDisconnect(context, selectedIDs) {
+	  var _vertexIDs = [];
+	  var _wayIDs = [];
+	  var _otherIDs = [];
+	  var _actions = [];
+	  selectedIDs.forEach(function (id) {
+	    var entity = context.entity(id);
+
+	    if (entity.type === 'way') {
+	      _wayIDs.push(id);
+	    } else if (entity.geometry(context.graph()) === 'vertex') {
+	      _vertexIDs.push(id);
+	    } else {
+	      _otherIDs.push(id);
+	    }
+	  });
 
-	        var ul = selection
-	            .selectAll('.layer-list-osm')
-	            .data([0]);
+	  var _coords,
+	      _descriptionID = '',
+	      _annotationID = 'features';
 
-	        ul = ul.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-list-osm')
-	            .merge(ul);
+	  var _disconnectingVertexIds = [];
+	  var _disconnectingWayIds = [];
 
-	        var li = ul.selectAll('.list-item')
-	            .data(osmLayers);
+	  if (_vertexIDs.length > 0) {
+	    // At the selected vertices, disconnect the selected ways, if any, else
+	    // disconnect all connected ways
+	    _disconnectingVertexIds = _vertexIDs;
 
-	        li.exit()
-	            .remove();
+	    _vertexIDs.forEach(function (vertexID) {
+	      var action = actionDisconnect(vertexID);
 
-	        var liEnter = li.enter()
-	            .append('li')
-	            .attr('class', function(d) { return 'list-item list-item-' + d.id; });
+	      if (_wayIDs.length > 0) {
+	        var waysIDsForVertex = _wayIDs.filter(function (wayID) {
+	          var way = context.entity(wayID);
+	          return way.nodes.indexOf(vertexID) !== -1;
+	        });
 
-	        var labelEnter = liEnter
-	            .append('label')
-	            .each(function(d) {
-	                if (d.id === 'osm') {
-	                    select(this)
-	                        .call(uiTooltip()
-	                            .title(_t('map_data.layers.' + d.id + '.tooltip'))
-	                            .keys([uiCmd('⌥' + _t('area_fill.wireframe.key'))])
-	                            .placement('bottom')
-	                        );
-	                } else {
-	                    select(this)
-	                        .call(uiTooltip()
-	                            .title(_t('map_data.layers.' + d.id + '.tooltip'))
-	                            .placement('bottom')
-	                        );
-	                }
-	            });
+	        action.limitWays(waysIDsForVertex);
+	      }
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function(d) { toggleLayer(d.id); });
+	      _actions.push(action);
 
-	        labelEnter
-	            .append('span')
-	            .text(function(d) { return _t('map_data.layers.' + d.id + '.title'); });
+	      _disconnectingWayIds = _disconnectingWayIds.concat(context.graph().parentWays(context.graph().entity(vertexID)).map(function (d) {
+	        return d.id;
+	      }));
+	    });
 
+	    _disconnectingWayIds = utilArrayUniq(_disconnectingWayIds).filter(function (id) {
+	      return _wayIDs.indexOf(id) === -1;
+	    });
+	    _descriptionID += _actions.length === 1 ? 'single_point.' : 'multiple_points.';
 
-	        // Update
-	        li
-	            .merge(liEnter)
-	            .classed('active', function (d) { return d.layer.enabled(); })
-	            .selectAll('input')
-	            .property('checked', function (d) { return d.layer.enabled(); });
+	    if (_wayIDs.length === 1) {
+	      _descriptionID += 'single_way.' + context.graph().geometry(_wayIDs[0]);
+	    } else {
+	      _descriptionID += _wayIDs.length === 0 ? 'no_ways' : 'multiple_ways';
 	    }
+	  } else if (_wayIDs.length > 0) {
+	    // Disconnect the selected ways from each other, if they're connected,
+	    // else disconnect them from all connected ways
+	    var ways = _wayIDs.map(function (id) {
+	      return context.entity(id);
+	    });
 
-	    function drawQAItems(selection) {
-	        var qaKeys = ['keepRight', 'improveOSM', 'osmose'];
-	        var qaLayers = layers.all().filter(function(obj) { return qaKeys.indexOf(obj.id) !== -1; });
+	    var nodes = utilGetAllNodes(_wayIDs, context.graph());
+	    _coords = nodes.map(function (n) {
+	      return n.loc;
+	    }); // actions for connected nodes shared by at least two selected ways
 
-	        var ul = selection
-	            .selectAll('.layer-list-qa')
-	            .data([0]);
+	    var sharedActions = [];
+	    var sharedNodes = []; // actions for connected nodes
 
-	        ul = ul.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-list-qa')
-	            .merge(ul);
+	    var unsharedActions = [];
+	    var unsharedNodes = [];
+	    nodes.forEach(function (node) {
+	      var action = actionDisconnect(node.id).limitWays(_wayIDs);
 
-	        var li = ul.selectAll('.list-item')
-	            .data(qaLayers);
+	      if (action.disabled(context.graph()) !== 'not_connected') {
+	        var count = 0;
 
-	        li.exit()
-	            .remove();
+	        for (var i in ways) {
+	          var way = ways[i];
 
-	        var liEnter = li.enter()
-	            .append('li')
-	            .attr('class', function(d) { return 'list-item list-item-' + d.id; });
+	          if (way.nodes.indexOf(node.id) !== -1) {
+	            count += 1;
+	          }
 
-	        var labelEnter = liEnter
-	            .append('label')
-	            .each(function(d) {
-	                select(this)
-	                    .call(uiTooltip()
-	                        .title(_t('map_data.layers.' + d.id + '.tooltip'))
-	                        .placement('bottom')
-	                    );
-	            });
+	          if (count > 1) break;
+	        }
+
+	        if (count > 1) {
+	          sharedActions.push(action);
+	          sharedNodes.push(node);
+	        } else {
+	          unsharedActions.push(action);
+	          unsharedNodes.push(node);
+	        }
+	      }
+	    });
+	    _descriptionID += 'no_points.';
+	    _descriptionID += _wayIDs.length === 1 ? 'single_way.' : 'multiple_ways.';
+
+	    if (sharedActions.length) {
+	      // if any nodes are shared, only disconnect the selected ways from each other
+	      _actions = sharedActions;
+	      _disconnectingVertexIds = sharedNodes.map(function (node) {
+	        return node.id;
+	      });
+	      _descriptionID += 'conjoined';
+	      _annotationID = 'from_each_other';
+	    } else {
+	      // if no nodes are shared, disconnect the selected ways from all connected ways
+	      _actions = unsharedActions;
+	      _disconnectingVertexIds = unsharedNodes.map(function (node) {
+	        return node.id;
+	      });
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function(d) { toggleLayer(d.id); });
+	      if (_wayIDs.length === 1) {
+	        _descriptionID += context.graph().geometry(_wayIDs[0]);
+	      } else {
+	        _descriptionID += 'separate';
+	      }
+	    }
+	  }
 
-	        labelEnter
-	            .append('span')
-	            .text(function(d) { return _t('map_data.layers.' + d.id + '.title'); });
+	  var _extent = utilTotalExtent(_disconnectingVertexIds, context.graph());
 
+	  var operation = function operation() {
+	    context.perform(function (graph) {
+	      return _actions.reduce(function (graph, action) {
+	        return action(graph);
+	      }, graph);
+	    }, operation.annotation());
+	    context.validator().validate();
+	  };
 
-	        // Update
-	        li
-	            .merge(liEnter)
-	            .classed('active', function (d) { return d.layer.enabled(); })
-	            .selectAll('input')
-	            .property('checked', function (d) { return d.layer.enabled(); });
+	  operation.relatedEntityIds = function () {
+	    if (_vertexIDs.length) {
+	      return _disconnectingWayIds;
 	    }
 
-	    // Beta feature - sample vector layers to support Detroit Mapping Challenge
-	    // https://github.com/osmus/detroit-mapping-challenge
-	    function drawVectorItems(selection) {
-	        var dataLayer = layers.layer('data');
-	        var vtData = [
-	            {
-	                name: 'Detroit Neighborhoods/Parks',
-	                src: 'neighborhoods-parks',
-	                tooltip: 'Neighborhood boundaries and parks as compiled by City of Detroit in concert with community groups.',
-	                template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmur6x34562qp9iv1u3ksf-54hev,jonahadkins.cjksmqxdx33jj2wp90xd9x2md-4e5y2/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
-	            }, {
-	                name: 'Detroit Composite POIs',
-	                src: 'composite-poi',
-	                tooltip: 'Fire Inspections, Business Licenses, and other public location data collated from the City of Detroit.',
-	                template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmm6a02sli31myxhsr7zf3-2sw8h/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
-	            }, {
-	                name: 'Detroit All-The-Places POIs',
-	                src: 'alltheplaces-poi',
-	                tooltip: 'Public domain business location data created by web scrapers.',
-	                template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmswgk340g2vo06p1w9w0j-8fjjc/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
-	            }
-	        ];
+	    return _disconnectingVertexIds;
+	  };
 
-	        // Only show this if the map is around Detroit..
-	        var detroit = geoExtent([-83.5, 42.1], [-82.8, 42.5]);
-	        var showVectorItems = (context.map().zoom() > 9 && detroit.contains(context.map().center()));
+	  operation.available = function () {
+	    if (_actions.length === 0) return false;
+	    if (_otherIDs.length !== 0) return false;
+	    if (_vertexIDs.length !== 0 && _wayIDs.length !== 0 && !_wayIDs.every(function (wayID) {
+	      return _vertexIDs.some(function (vertexID) {
+	        var way = context.entity(wayID);
+	        return way.nodes.indexOf(vertexID) !== -1;
+	      });
+	    })) return false;
+	    return true;
+	  };
 
-	        var container = selection.selectAll('.vectortile-container')
-	            .data(showVectorItems ? [0] : []);
+	  operation.disabled = function () {
+	    var reason;
 
-	        container.exit()
-	            .remove();
+	    for (var actionIndex in _actions) {
+	      reason = _actions[actionIndex].disabled(context.graph());
+	      if (reason) return reason;
+	    }
 
-	        var containerEnter = container.enter()
-	            .append('div')
-	            .attr('class', 'vectortile-container');
+	    if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large.' + ((_vertexIDs.length ? _vertexIDs : _wayIDs).length === 1 ? 'single' : 'multiple');
+	    } else if (_coords && someMissing()) {
+	      return 'not_downloaded';
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
+	    }
 
-	        containerEnter
-	            .append('h4')
-	            .attr('class', 'vectortile-header')
-	            .text('Detroit Vector Tiles (Beta)');
+	    return false;
 
-	        containerEnter
-	            .append('ul')
-	            .attr('class', 'layer-list layer-list-vectortile');
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	        containerEnter
-	            .append('div')
-	            .attr('class', 'vectortile-footer')
-	            .append('a')
-	            .attr('target', '_blank')
-	            .attr('tabindex', -1)
-	            .call(svgIcon('#iD-icon-out-link', 'inline'))
-	            .attr('href', 'https://github.com/osmus/detroit-mapping-challenge')
-	            .append('span')
-	            .text('About these layers');
+	      if (osm) {
+	        var missing = _coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	        container = container
-	            .merge(containerEnter);
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
+	        }
+	      }
 
+	      return false;
+	    }
+	  };
 
-	        var ul = container.selectAll('.layer-list-vectortile');
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
 
-	        var li = ul.selectAll('.list-item')
-	            .data(vtData);
+	    if (disable) {
+	      return _t('operations.disconnect.' + disable);
+	    }
 
-	        li.exit()
-	            .remove();
+	    return _t('operations.disconnect.description.' + _descriptionID);
+	  };
 
-	        var liEnter = li.enter()
-	            .append('li')
-	            .attr('class', function(d) { return 'list-item list-item-' + d.src; });
+	  operation.annotation = function () {
+	    return _t('operations.disconnect.annotation.' + _annotationID);
+	  };
 
-	        var labelEnter = liEnter
-	            .append('label')
-	            .each(function(d) {
-	                select(this).call(
-	                    uiTooltip().title(d.tooltip).placement('top')
-	                );
-	            });
+	  operation.id = 'disconnect';
+	  operation.keys = [_t('operations.disconnect.key')];
+	  operation.title = _t('operations.disconnect.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'radio')
-	            .attr('name', 'vectortile')
-	            .on('change', selectVTLayer);
+	function operationDowngrade(context, selectedIDs) {
+	  var _affectedFeatureCount = 0;
 
-	        labelEnter
-	            .append('span')
-	            .text(function(d) { return d.name; });
+	  var _downgradeType = downgradeTypeForEntityIDs(selectedIDs);
 
-	        // Update
-	        li
-	            .merge(liEnter)
-	            .classed('active', isVTLayerSelected)
-	            .selectAll('input')
-	            .property('checked', isVTLayerSelected);
+	  var _multi = _affectedFeatureCount === 1 ? 'single' : 'multiple';
 
+	  function downgradeTypeForEntityIDs(entityIds) {
+	    var downgradeType;
+	    _affectedFeatureCount = 0;
 
-	        function isVTLayerSelected(d) {
-	            return dataLayer && dataLayer.template() === d.template;
-	        }
+	    for (var i in entityIds) {
+	      var entityID = entityIds[i];
+	      var type = downgradeTypeForEntityID(entityID);
 
-	        function selectVTLayer(d) {
-	            corePreferences('settings-custom-data-url', d.template);
-	            if (dataLayer) {
-	                dataLayer.template(d.template, d.src);
-	                dataLayer.enabled(true);
-	            }
+	      if (type) {
+	        _affectedFeatureCount += 1;
+
+	        if (downgradeType && type !== downgradeType) {
+	          if (downgradeType !== 'generic' && type !== 'generic') {
+	            downgradeType = 'building_address';
+	          } else {
+	            downgradeType = 'generic';
+	          }
+	        } else {
+	          downgradeType = type;
 	        }
+	      }
 	    }
 
-	    function drawCustomDataItems(selection) {
-	        var dataLayer = layers.layer('data');
-	        var hasData = dataLayer && dataLayer.hasData();
-	        var showsData = hasData && dataLayer.enabled();
-
-	        var ul = selection
-	            .selectAll('.layer-list-data')
-	            .data(dataLayer ? [0] : []);
+	    return downgradeType;
+	  }
 
-	        // Exit
-	        ul.exit()
-	            .remove();
+	  function downgradeTypeForEntityID(entityID) {
+	    var graph = context.graph();
+	    var entity = graph.entity(entityID);
+	    var preset = _mainPresetIndex.match(entity, graph);
+	    if (!preset || preset.isFallback()) return null;
 
-	        // Enter
-	        var ulEnter = ul.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-list-data');
+	    if (entity.type === 'node' && preset.id !== 'address' && Object.keys(entity.tags).some(function (key) {
+	      return key.match(/^addr:.{1,}/);
+	    })) {
+	      return 'address';
+	    }
 
-	        var liEnter = ulEnter
-	            .append('li')
-	            .attr('class', 'list-item-data');
+	    var geometry = entity.geometry(graph);
 
-	        var labelEnter = liEnter
-	            .append('label')
-	            .call(uiTooltip()
-	                .title(_t('map_data.layers.custom.tooltip'))
-	                .placement('top')
-	            );
+	    if (geometry === 'area' && entity.tags.building && !preset.tags.building) {
+	      return 'building';
+	    }
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function() { toggleLayer('data'); });
+	    if (geometry === 'vertex' && Object.keys(entity.tags).length) {
+	      return 'generic';
+	    }
 
-	        labelEnter
-	            .append('span')
-	            .text(_t('map_data.layers.custom.title'));
+	    return null;
+	  }
 
-	        liEnter
-	            .append('button')
-	            .call(uiTooltip()
-	                .title(_t('settings.custom_data.tooltip'))
-	                .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-	            )
-	            .on('click', editCustom)
-	            .call(svgIcon('#iD-icon-more'));
-
-	        liEnter
-	            .append('button')
-	            .call(uiTooltip()
-	                .title(_t('map_data.layers.custom.zoom'))
-	                .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-	            )
-	            .on('click', function() {
-	                event.preventDefault();
-	                event.stopPropagation();
-	                dataLayer.fitZoom();
-	            })
-	            .call(svgIcon('#iD-icon-framed-dot'));
+	  var buildingKeysToKeep = ['architect', 'building', 'height', 'layer', 'source', 'type', 'wheelchair'];
+	  var addressKeysToKeep = ['source'];
 
-	        // Update
-	        ul = ul
-	            .merge(ulEnter);
+	  var operation = function operation() {
+	    context.perform(function (graph) {
+	      for (var i in selectedIDs) {
+	        var entityID = selectedIDs[i];
+	        var type = downgradeTypeForEntityID(entityID);
+	        if (!type) continue;
+	        var tags = Object.assign({}, graph.entity(entityID).tags); // shallow copy
 
-	        ul.selectAll('.list-item-data')
-	            .classed('active', showsData)
-	            .selectAll('label')
-	            .classed('deemphasize', !hasData)
-	            .selectAll('input')
-	            .property('disabled', !hasData)
-	            .property('checked', showsData);
-	    }
+	        for (var key in tags) {
+	          if (type === 'address' && addressKeysToKeep.indexOf(key) !== -1) continue;
 
-	    function editCustom() {
-	        event.preventDefault();
-	        context.container()
-	            .call(settingsCustomData);
-	    }
+	          if (type === 'building') {
+	            if (buildingKeysToKeep.indexOf(key) !== -1 || key.match(/^building:.{1,}/) || key.match(/^roof:.{1,}/)) continue;
+	          }
 
-	    function customChanged(d) {
-	        var dataLayer = layers.layer('data');
+	          if (type !== 'generic') {
+	            if (key.match(/^addr:.{1,}/) || key.match(/^source:.{1,}/)) continue;
+	          }
 
-	        if (d && d.url) {
-	            dataLayer.url(d.url);
-	        } else if (d && d.fileList) {
-	            dataLayer.fileList(d.fileList);
+	          delete tags[key];
 	        }
-	    }
 
+	        graph = actionChangeTags(entityID, tags)(graph);
+	      }
 
-	    function drawPanelItems(selection) {
+	      return graph;
+	    }, operation.annotation());
+	    context.validator().validate(); // refresh the select mode to enable the delete operation
 
-	        var panelsListEnter = selection.selectAll('.md-extras-list')
-	            .data([0])
-	            .enter()
-	            .append('ul')
-	            .attr('class', 'layer-list md-extras-list');
-
-	        var historyPanelLabelEnter = panelsListEnter
-	            .append('li')
-	            .attr('class', 'history-panel-toggle-item')
-	            .append('label')
-	            .call(uiTooltip()
-	                .title(_t('map_data.history_panel.tooltip'))
-	                .keys([uiCmd('⌘⇧' + _t('info_panels.history.key'))])
-	                .placement('top')
-	            );
-
-	        historyPanelLabelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function() {
-	                event.preventDefault();
-	                context.ui().info.toggle('history');
-	            });
+	    context.enter(modeSelect(context, selectedIDs));
+	  };
 
-	        historyPanelLabelEnter
-	            .append('span')
-	            .text(_t('map_data.history_panel.title'));
-
-	        var measurementPanelLabelEnter = panelsListEnter
-	            .append('li')
-	            .attr('class', 'measurement-panel-toggle-item')
-	            .append('label')
-	            .call(uiTooltip()
-	                .title(_t('map_data.measurement_panel.tooltip'))
-	                .keys([uiCmd('⌘⇧' + _t('info_panels.measurement.key'))])
-	                .placement('top')
-	            );
-
-	        measurementPanelLabelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function() {
-	                event.preventDefault();
-	                context.ui().info.toggle('measurement');
-	            });
+	  operation.available = function () {
+	    return _downgradeType;
+	  };
 
-	        measurementPanelLabelEnter
-	            .append('span')
-	            .text(_t('map_data.measurement_panel.title'));
+	  operation.disabled = function () {
+	    if (selectedIDs.some(hasWikidataTag)) {
+	      return 'has_wikidata_tag';
 	    }
 
-	    context.layers().on('change.uiSectionDataLayers', section.reRender);
+	    return false;
 
-	    context.map()
-	        .on('move.uiSectionDataLayers',
-	            debounce(function() {
-	                // Detroit layers may have moved in or out of view
-	                window.requestIdleCallback(section.reRender);
-	            }, 1000)
-	        );
+	    function hasWikidataTag(id) {
+	      var entity = context.entity(id);
+	      return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
+	    }
+	  };
 
-	    return section;
-	}
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.downgrade.' + disable + '.' + _multi) : _t('operations.downgrade.description.' + _downgradeType);
+	  };
 
-	function uiSectionMapFeatures(context) {
+	  operation.annotation = function () {
+	    var suffix;
 
-	    var _features = context.features().keys();
+	    if (_downgradeType === 'building_address') {
+	      suffix = 'generic';
+	    } else {
+	      suffix = _downgradeType;
+	    }
 
-	    var section = uiSection('map-features', context)
-	        .title(_t('map_data.map_features'))
-	        .disclosureContent(renderDisclosureContent)
-	        .expandedByDefault(false);
+	    return _t('operations.downgrade.annotation.' + suffix, {
+	      n: _affectedFeatureCount
+	    });
+	  };
 
-	    function renderDisclosureContent(selection) {
+	  operation.id = 'downgrade';
+	  operation.keys = [uiCmd('⌫')];
+	  operation.title = _t('operations.downgrade.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	        var container = selection.selectAll('.layer-feature-list-container')
-	            .data([0]);
+	function operationExtract(context, selectedIDs) {
+	  var _amount = selectedIDs.length === 1 ? 'single' : 'multiple';
 
-	        var containerEnter = container.enter()
-	            .append('div')
-	            .attr('class', 'layer-feature-list-container');
+	  var _geometries = utilArrayUniq(selectedIDs.map(function (entityID) {
+	    return context.graph().hasEntity(entityID) && context.graph().geometry(entityID);
+	  }).filter(Boolean));
 
-	        containerEnter
-	            .append('ul')
-	            .attr('class', 'layer-list layer-feature-list');
+	  var _geometryID = _geometries.length === 1 ? _geometries[0] : 'feature';
 
-	        var footer = containerEnter
-	            .append('div')
-	            .attr('class', 'feature-list-links section-footer');
-
-	        footer
-	            .append('a')
-	            .attr('class', 'feature-list-link')
-	            .attr('href', '#')
-	            .text(_t('issues.enable_all'))
-	            .on('click', function() {
-	                context.features().enableAll();
-	            });
+	  var _extent;
 
-	        footer
-	            .append('a')
-	            .attr('class', 'feature-list-link')
-	            .attr('href', '#')
-	            .text(_t('issues.disable_all'))
-	            .on('click', function() {
-	                context.features().disableAll();
-	            });
+	  var _actions = selectedIDs.map(function (entityID) {
+	    var graph = context.graph();
+	    var entity = graph.hasEntity(entityID);
+	    if (!entity || !entity.hasInterestingTags()) return null;
+	    if (entity.type === 'node' && graph.parentWays(entity).length === 0) return null;
 
-	        // Update
-	        container = container
-	            .merge(containerEnter);
+	    if (entity.type !== 'node') {
+	      var preset = _mainPresetIndex.match(entity, graph); // only allow extraction from ways/relations if the preset supports points
 
-	        container.selectAll('.layer-feature-list')
-	            .call(drawListItems, _features, 'checkbox', 'feature', clickFeature, showsFeature);
+	      if (preset.geometry.indexOf('point') === -1) return null;
 	    }
 
-	    function drawListItems(selection, data, type, name, change, active) {
-	        var items = selection.selectAll('li')
-	            .data(data);
+	    _extent = _extent ? _extent.extend(entity.extent(graph)) : entity.extent(graph);
+	    return actionExtract(entityID, context.projection);
+	  }).filter(Boolean);
 
-	        // Exit
-	        items.exit()
-	            .remove();
-
-	        // Enter
-	        var enter = items.enter()
-	            .append('li')
-	            .call(uiTooltip()
-	                .title(function(d) {
-	                    var tip = _t(name + '.' + d + '.tooltip');
-	                    if (autoHiddenFeature(d)) {
-	                        var msg = showsLayer('osm') ? _t('map_data.autohidden') : _t('map_data.osmhidden');
-	                        tip += '<div>' + msg + '</div>';
-	                    }
-	                    return tip;
-	                })
-	                .placement('top')
-	            );
+	  var operation = function operation() {
+	    var combinedAction = function combinedAction(graph) {
+	      _actions.forEach(function (action) {
+	        graph = action(graph);
+	      });
 
-	        var label = enter
-	            .append('label');
+	      return graph;
+	    };
 
-	        label
-	            .append('input')
-	            .attr('type', type)
-	            .attr('name', name)
-	            .on('change', change);
+	    context.perform(combinedAction, operation.annotation()); // do the extract
 
-	        label
-	            .append('span')
-	            .text(function(d) { return _t(name + '.' + d + '.description'); });
+	    var extractedNodeIDs = _actions.map(function (action) {
+	      return action.getExtractedNodeID();
+	    });
 
-	        // Update
-	        items = items
-	            .merge(enter);
+	    context.enter(modeSelect(context, extractedNodeIDs));
+	  };
 
-	        items
-	            .classed('active', active)
-	            .selectAll('input')
-	            .property('checked', active)
-	            .property('indeterminate', autoHiddenFeature);
-	    }
+	  operation.available = function () {
+	    return _actions.length && selectedIDs.length === _actions.length;
+	  };
 
-	    function autoHiddenFeature(d) {
-	        return context.features().autoHidden(d);
+	  operation.disabled = function () {
+	    if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    } else if (selectedIDs.some(function (entityID) {
+	      return context.graph().geometry(entityID) === 'vertex' && context.hasHiddenConnections(entityID);
+	    })) {
+	      return 'connected_to_hidden';
 	    }
 
-	    function showsFeature(d) {
-	        return context.features().enabled(d);
-	    }
+	    return false;
+	  };
 
-	    function clickFeature(d) {
-	        context.features().toggle(d);
-	    }
+	  operation.tooltip = function () {
+	    var disableReason = operation.disabled();
 
-	    function showsLayer(id) {
-	        var layer = context.layers().layer(id);
-	        return layer && layer.enabled();
+	    if (disableReason) {
+	      return _t('operations.extract.' + disableReason + '.' + _amount);
+	    } else {
+	      return _t('operations.extract.description.' + _geometryID + '.' + _amount);
 	    }
+	  };
 
-	    // add listeners
-	    context.features()
-	        .on('change.map_features', section.reRender);
+	  operation.annotation = function () {
+	    return _t('operations.extract.annotation', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	    return section;
+	  operation.id = 'extract';
+	  operation.keys = [_t('operations.extract.key')];
+	  operation.title = _t('operations.extract.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
 	}
 
-	function uiSectionMapStyleOptions(context) {
-
-	    var section = uiSection('fill-area', context)
-	        .title(_t('map_data.style_options'))
-	        .disclosureContent(renderDisclosureContent)
-	        .expandedByDefault(false);
-
-	    function renderDisclosureContent(selection) {
-	        var container = selection.selectAll('.layer-fill-list')
-	            .data([0]);
-
-	        container.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-fill-list')
-	            .merge(container)
-	            .call(drawListItems, context.map().areaFillOptions, 'radio', 'area_fill', setFill, isActiveFill);
-
-	        var container2 = selection.selectAll('.layer-visual-diff-list')
-	            .data([0]);
-
-	        container2.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-visual-diff-list')
-	            .merge(container2)
-	            .call(drawListItems, ['highlight_edits'], 'checkbox', 'visual_diff', toggleHighlightEdited, function() {
-	                return context.surface().classed('highlight-edited');
-	            });
+	function operationMerge(context, selectedIDs) {
+	  var _action = getAction();
+
+	  function getAction() {
+	    // prefer a non-disabled action first
+	    var join = actionJoin(selectedIDs);
+	    if (!join.disabled(context.graph())) return join;
+	    var merge = actionMerge(selectedIDs);
+	    if (!merge.disabled(context.graph())) return merge;
+	    var mergePolygon = actionMergePolygon(selectedIDs);
+	    if (!mergePolygon.disabled(context.graph())) return mergePolygon;
+	    var mergeNodes = actionMergeNodes(selectedIDs);
+	    if (!mergeNodes.disabled(context.graph())) return mergeNodes; // otherwise prefer an action with an interesting disabled reason
+
+	    if (join.disabled(context.graph()) !== 'not_eligible') return join;
+	    if (merge.disabled(context.graph()) !== 'not_eligible') return merge;
+	    if (mergePolygon.disabled(context.graph()) !== 'not_eligible') return mergePolygon;
+	    return mergeNodes;
+	  }
+
+	  var operation = function operation() {
+	    if (operation.disabled()) return;
+	    context.perform(_action, operation.annotation());
+	    context.validator().validate();
+	    var resultIDs = selectedIDs.filter(context.hasEntity);
+
+	    if (resultIDs.length > 1) {
+	      var interestingIDs = resultIDs.filter(function (id) {
+	        return context.entity(id).hasInterestingTags();
+	      });
+	      if (interestingIDs.length) resultIDs = interestingIDs;
 	    }
 
-	    function drawListItems(selection, data, type, name, change, active) {
-	        var items = selection.selectAll('li')
-	            .data(data);
+	    context.enter(modeSelect(context, resultIDs));
+	  };
 
-	        // Exit
-	        items.exit()
-	            .remove();
+	  operation.available = function () {
+	    return selectedIDs.length >= 2;
+	  };
 
-	        // Enter
-	        var enter = items.enter()
-	            .append('li')
-	            .call(uiTooltip()
-	                .title(function(d) {
-	                    return _t(name + '.' + d + '.tooltip');
-	                })
-	                .keys(function(d) {
-	                    var key = (d === 'wireframe' ? _t('area_fill.wireframe.key') : null);
-	                    if (d === 'highlight_edits') { key = _t('map_data.highlight_edits.key'); }
-	                    return key ? [key] : null;
-	                })
-	                .placement('top')
-	            );
+	  operation.disabled = function () {
+	    var actionDisabled = _action.disabled(context.graph());
 
-	        var label = enter
-	            .append('label');
+	    if (actionDisabled) return actionDisabled;
+	    var osm = context.connection();
 
-	        label
-	            .append('input')
-	            .attr('type', type)
-	            .attr('name', name)
-	            .on('change', change);
+	    if (osm && _action.resultingWayNodesLength && _action.resultingWayNodesLength(context.graph()) > osm.maxWayNodes()) {
+	      return 'too_many_vertices';
+	    }
 
-	        label
-	            .append('span')
-	            .text(function(d) { return _t(name + '.' + d + '.description'); });
+	    return false;
+	  };
 
-	        // Update
-	        items = items
-	            .merge(enter);
+	  operation.tooltip = function () {
+	    var disabled = operation.disabled();
 
-	        items
-	            .classed('active', active)
-	            .selectAll('input')
-	            .property('checked', active)
-	            .property('indeterminate', false);
-	    }
+	    if (disabled) {
+	      if (disabled === 'conflicting_relations') {
+	        return _t('operations.merge.conflicting_relations');
+	      }
 
-	    function isActiveFill(d) {
-	        return context.map().activeAreaFill() === d;
-	    }
+	      if (disabled === 'restriction' || disabled === 'connectivity') {
+	        return _t('operations.merge.damage_relation', {
+	          relation: _mainPresetIndex.item('type/' + disabled).name()
+	        });
+	      }
 
-	    function toggleHighlightEdited() {
-	        event.preventDefault();
-	        context.map().toggleHighlightEdited();
+	      return _t('operations.merge.' + disabled);
 	    }
 
-	    function setFill(d) {
-	        context.map().activeAreaFill(d);
-	    }
+	    return _t('operations.merge.description');
+	  };
 
-	    context.map()
-	        .on('changeHighlighting.ui_style, changeAreaFill.ui_style', section.reRender);
+	  operation.annotation = function () {
+	    return _t('operations.merge.annotation', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	    return section;
+	  operation.id = 'merge';
+	  operation.keys = [_t('operations.merge.key')];
+	  operation.title = _t('operations.merge.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
 	}
 
-	function uiSectionPhotoOverlays(context) {
-
-	    var layers = context.layers();
+	function operationPaste(context) {
+	  var _pastePoint;
 
-	    var section = uiSection('photo-overlays', context)
-	        .title(_t('photo_overlays.title'))
-	        .disclosureContent(renderDisclosureContent)
-	        .expandedByDefault(false);
+	  var operation = function operation() {
+	    if (!_pastePoint) return;
+	    var oldIDs = context.copyIDs();
+	    if (!oldIDs.length) return;
+	    var projection = context.projection;
+	    var extent = geoExtent();
+	    var oldGraph = context.copyGraph();
+	    var newIDs = [];
+	    var action = actionCopyEntities(oldIDs, oldGraph);
+	    context.perform(action);
+	    var copies = action.copies();
+	    var originals = new Set();
+	    Object.values(copies).forEach(function (entity) {
+	      originals.add(entity.id);
+	    });
 
-	    function renderDisclosureContent(selection) {
-	        var container = selection.selectAll('.photo-overlay-container')
-	            .data([0]);
+	    for (var id in copies) {
+	      var oldEntity = oldGraph.entity(id);
+	      var newEntity = copies[id];
 
-	        container.enter()
-	            .append('div')
-	            .attr('class', 'photo-overlay-container')
-	            .merge(container)
-	            .call(drawPhotoItems)
-	            .call(drawPhotoTypeItems);
-	    }
+	      extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.
 
-	    function drawPhotoItems(selection) {
-	        var photoKeys = context.photos().overlayLayerIDs();
-	        var photoLayers = layers.all().filter(function(obj) { return photoKeys.indexOf(obj.id) !== -1; });
-	        var data = photoLayers.filter(function(obj) { return obj.layer.supported(); });
 
-	        function layerSupported(d) {
-	            return d.layer && d.layer.supported();
-	        }
-	        function layerEnabled(d) {
-	            return layerSupported(d) && d.layer.enabled();
-	        }
+	      var parents = context.graph().parentWays(newEntity);
+	      var parentCopied = parents.some(function (parent) {
+	        return originals.has(parent.id);
+	      });
 
-	        var ul = selection
-	            .selectAll('.layer-list-photos')
-	            .data([0]);
+	      if (!parentCopied) {
+	        newIDs.push(newEntity.id);
+	      }
+	    } // Use the location of the copy operation to offset the paste location,
+	    // or else use the center of the pasted extent
 
-	        ul = ul.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-list-photos')
-	            .merge(ul);
 
-	        var li = ul.selectAll('.list-item-photos')
-	            .data(data);
+	    var copyPoint = context.copyLonLat() && projection(context.copyLonLat()) || projection(extent.center());
+	    var delta = geoVecSubtract(_pastePoint, copyPoint); // Move the pasted objects to be anchored at the paste location
 
-	        li.exit()
-	            .remove();
+	    context.replace(actionMove(newIDs, delta, projection), operation.annotation());
+	    context.enter(modeSelect(context, newIDs));
+	  };
 
-	        var liEnter = li.enter()
-	            .append('li')
-	            .attr('class', function(d) {
-	                var classes = 'list-item-photos list-item-' + d.id;
-	                if (d.id === 'mapillary-signs' || d.id === 'mapillary-map-features') {
-	                    classes += ' indented';
-	                }
-	                return classes;
-	            });
+	  operation.point = function (val) {
+	    _pastePoint = val;
+	    return operation;
+	  };
 
-	        var labelEnter = liEnter
-	            .append('label')
-	            .each(function(d) {
-	                var titleID;
-	                if (d.id === 'mapillary-signs') { titleID = 'mapillary.signs.tooltip'; }
-	                else if (d.id === 'mapillary') { titleID = 'mapillary_images.tooltip'; }
-	                else if (d.id === 'openstreetcam') { titleID = 'openstreetcam_images.tooltip'; }
-	                else { titleID = d.id.replace(/-/g, '_') + '.tooltip'; }
-	                select(this)
-	                    .call(uiTooltip()
-	                        .title(_t(titleID))
-	                        .placement('top')
-	                    );
-	            });
+	  operation.available = function () {
+	    return context.mode().id === 'browse';
+	  };
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function(d) { toggleLayer(d.id); });
-
-	        labelEnter
-	            .append('span')
-	            .text(function(d) {
-	                var id = d.id;
-	                if (id === 'mapillary-signs') { id = 'photo_overlays.traffic_signs'; }
-	                return _t(id.replace(/-/g, '_') + '.title');
-	            });
+	  operation.disabled = function () {
+	    return !context.copyIDs().length;
+	  };
 
+	  operation.tooltip = function () {
+	    var oldGraph = context.copyGraph();
+	    var ids = context.copyIDs();
 
-	        // Update
-	        li
-	            .merge(liEnter)
-	            .classed('active', layerEnabled)
-	            .selectAll('input')
-	            .property('checked', layerEnabled);
+	    if (!ids.length) {
+	      return _t('operations.paste.nothing_copied');
 	    }
 
-	    function drawPhotoTypeItems(selection) {
-	        var data = context.photos().allPhotoTypes();
-
-	        function typeEnabled(d) {
-	            return context.photos().showsPhotoType(d);
-	        }
-
-	        var ul = selection
-	            .selectAll('.layer-list-photo-types')
-	            .data(context.photos().shouldFilterByPhotoType() ? [0] : []);
+	    return _t('operations.paste.description', {
+	      feature: utilDisplayLabel(oldGraph.entity(ids[0]), oldGraph),
+	      n: ids.length
+	    });
+	  };
 
-	        ul.exit()
-	            .remove();
+	  operation.annotation = function () {
+	    var ids = context.copyIDs();
+	    return _t('operations.paste.annotation', {
+	      n: ids.length
+	    });
+	  };
 
-	        ul = ul.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-list-photo-types')
-	            .merge(ul);
+	  operation.id = 'paste';
+	  operation.keys = [uiCmd('⌘V')];
+	  operation.title = _t('operations.paste.title');
+	  return operation;
+	}
 
-	        var li = ul.selectAll('.list-item-photo-types')
-	            .data(data);
+	function operationReverse(context, selectedIDs) {
+	  var operation = function operation() {
+	    context.perform(function combinedReverseAction(graph) {
+	      actions().forEach(function (action) {
+	        graph = action(graph);
+	      });
+	      return graph;
+	    }, operation.annotation());
+	    context.validator().validate();
+	  };
 
-	        li.exit()
-	            .remove();
+	  function actions(situation) {
+	    return selectedIDs.map(function (entityID) {
+	      var entity = context.hasEntity(entityID);
+	      if (!entity) return null;
 
-	        var liEnter = li.enter()
-	            .append('li')
-	            .attr('class', function(d) {
-	                return 'list-item-photo-types list-item-' + d;
-	            });
+	      if (situation === 'toolbar') {
+	        if (entity.type === 'way' && !entity.isOneWay() && !entity.isSided()) return null;
+	      }
 
-	        var labelEnter = liEnter
-	            .append('label')
-	            .each(function(d) {
-	                select(this)
-	                    .call(uiTooltip()
-	                        .title(_t('photo_overlays.photo_type.' + d + '.tooltip'))
-	                        .placement('top')
-	                    );
-	            });
+	      var geometry = entity.geometry(context.graph());
+	      if (entity.type !== 'node' && geometry !== 'line') return null;
+	      var action = actionReverse(entityID);
+	      if (action.disabled(context.graph())) return null;
+	      return action;
+	    }).filter(Boolean);
+	  }
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function(d) {
-	                context.photos().togglePhotoType(d);
-	            });
+	  function reverseTypeID() {
+	    var acts = actions();
+	    var nodeActionCount = acts.filter(function (act) {
+	      var entity = context.hasEntity(act.entityID());
+	      return entity && entity.type === 'node';
+	    }).length;
+	    if (nodeActionCount === 0) return 'line';
+	    if (nodeActionCount === acts.length) return 'point';
+	    return 'feature';
+	  }
 
-	        labelEnter
-	            .append('span')
-	            .text(function(d) {
-	                return _t('photo_overlays.photo_type.' + d + '.title');
-	            });
+	  operation.available = function (situation) {
+	    return actions(situation).length > 0;
+	  };
 
+	  operation.disabled = function () {
+	    return false;
+	  };
 
-	        // Update
-	        li
-	            .merge(liEnter)
-	            .classed('active', typeEnabled)
-	            .selectAll('input')
-	            .property('checked', typeEnabled);
-	    }
+	  operation.tooltip = function () {
+	    return _t('operations.reverse.description.' + reverseTypeID());
+	  };
 
-	    function toggleLayer(which) {
-	        setLayer(which, !showsLayer(which));
-	    }
+	  operation.annotation = function () {
+	    var acts = actions();
+	    return _t('operations.reverse.annotation.' + reverseTypeID(), {
+	      n: acts.length
+	    });
+	  };
 
-	    function showsLayer(which) {
-	        var layer = layers.layer(which);
-	        if (layer) {
-	            return layer.enabled();
-	        }
-	        return false;
-	    }
+	  operation.id = 'reverse';
+	  operation.keys = [_t('operations.reverse.key')];
+	  operation.title = _t('operations.reverse.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	    function setLayer(which, enabled) {
-	        var layer = layers.layer(which);
-	        if (layer) {
-	            layer.enabled(enabled);
-	        }
-	    }
+	function operationSplit(context, selectedIDs) {
+	  var _vertexIds = selectedIDs.filter(function (id) {
+	    return context.graph().geometry(id) === 'vertex';
+	  });
 
-	    context.layers().on('change.uiSectionPhotoOverlays', section.reRender);
-	    context.photos().on('change.uiSectionPhotoOverlays', section.reRender);
+	  var _selectedWayIds = selectedIDs.filter(function (id) {
+	    var entity = context.graph().hasEntity(id);
+	    return entity && entity.type === 'way';
+	  });
 
-	    return section;
-	}
+	  var _isAvailable = _vertexIds.length > 0 && _vertexIds.length + _selectedWayIds.length === selectedIDs.length;
 
-	function uiPaneMapData(context) {
+	  var _action = actionSplit(_vertexIds);
 
-	    var mapDataPane = uiPane('map-data', context)
-	        .key(_t('map_data.key'))
-	        .title(_t('map_data.title'))
-	        .description(_t('map_data.description'))
-	        .iconName('iD-icon-data')
-	        .sections([
-	            uiSectionDataLayers(context),
-	            uiSectionPhotoOverlays(context),
-	            uiSectionMapStyleOptions(context),
-	            uiSectionMapFeatures(context)
-	        ]);
+	  var _ways = [];
+	  var _geometry = 'feature';
+	  var _waysAmount = 'single';
 
-	    return mapDataPane;
-	}
+	  var _nodesAmount = _vertexIds.length === 1 ? 'single' : 'multiple';
 
-	function uiSectionPrivacy(context) {
+	  if (_isAvailable) {
+	    if (_selectedWayIds.length) _action.limitWays(_selectedWayIds);
+	    _ways = _action.ways(context.graph());
+	    var geometries = {};
 
-	    var section = uiSection('preferences-third-party', context)
-	      .title(_t('preferences.privacy.title'))
-	      .disclosureContent(renderDisclosureContent);
+	    _ways.forEach(function (way) {
+	      geometries[way.geometry(context.graph())] = true;
+	    });
 
-	    var _showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
+	    if (Object.keys(geometries).length === 1) {
+	      _geometry = Object.keys(geometries)[0];
+	    }
 
-	    function renderDisclosureContent(selection) {
-	      // enter
-	      var privacyOptionsListEnter = selection.selectAll('.privacy-options-list')
-	        .data([0])
-	        .enter()
-	        .append('ul')
-	        .attr('class', 'layer-list privacy-options-list');
-
-	      var thirdPartyIconsEnter = privacyOptionsListEnter
-	        .append('li')
-	        .attr('class', 'privacy-third-party-icons-item')
-	        .append('label')
-	        .call(uiTooltip()
-	          .title(_t('preferences.privacy.third_party_icons.tooltip'))
-	          .placement('bottom')
-	        );
+	    _waysAmount = _ways.length === 1 ? 'single' : 'multiple';
+	  }
 
-	      thirdPartyIconsEnter
-	        .append('input')
-	        .attr('type', 'checkbox')
-	        .on('change', function () {
-	          event.preventDefault();
-	          _showThirdPartyIcons = (_showThirdPartyIcons === 'true') ? 'false' : 'true';
-	          corePreferences('preferences.privacy.thirdpartyicons', _showThirdPartyIcons);
-	          update();
-	        });
+	  var operation = function operation() {
+	    var difference = context.perform(_action, operation.annotation()); // select both the nodes and the ways so the mapper can immediately disconnect them if desired
 
-	      thirdPartyIconsEnter
-	        .append('span')
-	        .text(_t('preferences.privacy.third_party_icons.description'));
+	    var idsToSelect = _vertexIds.concat(difference.extantIDs().filter(function (id) {
+	      // filter out relations that may have had member additions
+	      return context.entity(id).type === 'way';
+	    }));
 
+	    context.enter(modeSelect(context, idsToSelect));
+	  };
 
-	      // Privacy Policy link
-	      selection.selectAll('.privacy-link')
-	        .data([0])
-	        .enter()
-	        .append('div')
-	        .attr('class', 'privacy-link')
-	        .append('a')
-	        .attr('target', '_blank')
-	        .call(svgIcon('#iD-icon-out-link', 'inline'))
-	        .attr('href', 'https://github.com/openstreetmap/iD/blob/release/PRIVACY.md')
-	        .append('span')
-	        .text(_t('preferences.privacy.privacy_link'));
+	  operation.relatedEntityIds = function () {
+	    return _selectedWayIds.length ? [] : _ways.map(function (way) {
+	      return way.id;
+	    });
+	  };
 
-	      update();
+	  operation.available = function () {
+	    return _isAvailable;
+	  };
 
+	  operation.disabled = function () {
+	    var reason = _action.disabled(context.graph());
 
-	      function update() {
-	        selection.selectAll('.privacy-third-party-icons-item')
-	          .classed('active', (_showThirdPartyIcons === 'true'))
-	          .select('input')
-	          .property('checked', (_showThirdPartyIcons === 'true'));
-	      }
+	    if (reason) {
+	      return reason;
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
 	    }
 
-	    return section;
-	}
+	    return false;
+	  };
 
-	function uiPanePreferences(context) {
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    if (disable) return _t('operations.split.' + disable);
+	    return _t('operations.split.description.' + _geometry + '.' + _waysAmount + '.' + _nodesAmount + '_node');
+	  };
 
-	  var preferencesPane = uiPane('preferences', context)
-	    .key(_t('preferences.key'))
-	    .title(_t('preferences.title'))
-	    .description(_t('preferences.description'))
-	    .iconName('fas-user-cog')
-	    .sections([
-	        uiSectionPrivacy(context)
-	    ]);
+	  operation.annotation = function () {
+	    return _t('operations.split.annotation.' + _geometry, {
+	      n: _ways.length
+	    });
+	  };
 
-	  return preferencesPane;
+	  operation.id = 'split';
+	  operation.keys = [_t('operations.split.key')];
+	  operation.title = _t('operations.split.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
 	}
 
-	function uiInit(context) {
-	    var _initCounter = 0;
-	    var _needWidth = {};
-
-	    var _lastPointerType;
+	function operationStraighten(context, selectedIDs) {
+	  var _wayIDs = selectedIDs.filter(function (id) {
+	    return id.charAt(0) === 'w';
+	  });
 
+	  var _nodeIDs = selectedIDs.filter(function (id) {
+	    return id.charAt(0) === 'n';
+	  });
 
-	    function render(container) {
+	  var _amount = (_wayIDs.length ? _wayIDs : _nodeIDs).length === 1 ? 'single' : 'multiple';
 
-	        container
-	            .on('click.ui', function() {
-	                // we're only concerned with the primary mouse button
-	                if (event.button !== 0) { return; }
+	  var _nodes = utilGetAllNodes(selectedIDs, context.graph());
 
-	                if (!event.composedPath) { return; }
+	  var _coords = _nodes.map(function (n) {
+	    return n.loc;
+	  });
 
-	                // some targets have default click events we don't want to override
-	                var isOkayTarget = event.composedPath().some(function(node) {
-	                    // we only care about element nodes
-	                    return node.nodeType === 1 &&
-	                        // clicking <input> focuses it and/or changes a value
-	                        (node.nodeName === 'INPUT' ||
-	                        // clicking <label> affects its <input> by default
-	                        node.nodeName === 'LABEL' ||
-	                        // clicking <a> opens a hyperlink by default
-	                        node.nodeName === 'A');
-	                });
-	                if (isOkayTarget) { return; }
+	  var _extent = utilTotalExtent(selectedIDs, context.graph());
 
-	                // disable double-tap-to-zoom on touchscreens
-	                event.preventDefault();
-	            });
+	  var _action = chooseAction();
 
-	        var detected = utilDetect();
+	  var _geometry;
 
-	        // only WebKit supports gesture events
-	        if ('GestureEvent' in window &&
-	            // Listening for gesture events on iOS 13.4+ breaks double-tapping,
-	            // but we only need to do this on desktop Safari anyway. – #7694
-	            !detected.isMobileWebKit) {
+	  function chooseAction() {
+	    // straighten selected nodes
+	    if (_wayIDs.length === 0 && _nodeIDs.length > 2) {
+	      _geometry = 'point';
+	      return actionStraightenNodes(_nodeIDs, context.projection); // straighten selected ways (possibly between range of 2 selected nodes)
+	    } else if (_wayIDs.length > 0 && (_nodeIDs.length === 0 || _nodeIDs.length === 2)) {
+	      var startNodeIDs = [];
+	      var endNodeIDs = [];
 
-	            // On iOS we disable pinch-to-zoom of the UI via the `touch-action`
-	            // CSS property, but on desktop Safari we need to manually cancel the
-	            // default gesture events.
-	            container.on('gesturestart.ui gesturechange.ui gestureend.ui', function() {
-	                // disable pinch-to-zoom of the UI via multitouch trackpads on macOS Safari
-	                event.preventDefault();
-	            });
-	        }
+	      for (var i = 0; i < selectedIDs.length; i++) {
+	        var entity = context.entity(selectedIDs[i]);
 
-	        if ('PointerEvent' in window) {
-	            select(window)
-	                .on('pointerdown.ui pointerup.ui', function() {
-	                    var pointerType = event.pointerType || 'mouse';
-	                    if (_lastPointerType !== pointerType) {
-	                        _lastPointerType = pointerType;
-	                        container
-	                            .attr('pointer', pointerType);
-	                    }
-	                }, true);
-	        } else {
-	            _lastPointerType = 'mouse';
-	            container
-	                .attr('pointer', 'mouse');
+	        if (entity.type === 'node') {
+	          continue;
+	        } else if (entity.type !== 'way' || entity.isClosed()) {
+	          return null; // exit early, can't straighten these
 	        }
 
-	        container
-	            .attr('dir', _mainLocalizer.textDirection());
-
-	        // setup fullscreen keybindings (no button shown at this time)
-	        container
-	            .call(uiFullScreen(context));
+	        startNodeIDs.push(entity.first());
+	        endNodeIDs.push(entity.last());
+	      } // Remove duplicate end/startNodeIDs (duplicate nodes cannot be at the line end)
 
-	        var map = context.map();
-	        map.redrawEnable(false);  // don't draw until we've set zoom/lat/long
 
-	        map
-	            .on('hitMinZoom.ui', function() {
-	                ui.flash.text(_t('cannot_zoom'))();
-	            });
-
-	        container
-	            .append('svg')
-	            .attr('id', 'ideditor-defs')
-	            .call(svgDefs(context));
+	      startNodeIDs = startNodeIDs.filter(function (n) {
+	        return startNodeIDs.indexOf(n) === startNodeIDs.lastIndexOf(n);
+	      });
+	      endNodeIDs = endNodeIDs.filter(function (n) {
+	        return endNodeIDs.indexOf(n) === endNodeIDs.lastIndexOf(n);
+	      }); // Ensure all ways are connected (i.e. only 2 unique endpoints/startpoints)
 
-	        container
-	            .append('div')
-	            .attr('class', 'sidebar')
-	            .call(ui.sidebar);
+	      if (utilArrayDifference(startNodeIDs, endNodeIDs).length + utilArrayDifference(endNodeIDs, startNodeIDs).length !== 2) return null; // Ensure path contains at least 3 unique nodes
 
-	        var content = container
-	            .append('div')
-	            .attr('class', 'main-content active');
+	      var wayNodeIDs = utilGetAllNodes(_wayIDs, context.graph()).map(function (node) {
+	        return node.id;
+	      });
+	      if (wayNodeIDs.length <= 2) return null; // If range of 2 selected nodes is supplied, ensure nodes lie on the selected path
 
-	        // Top toolbar
-	        content
-	            .append('div')
-	            .attr('class', 'top-toolbar-wrap')
-	            .append('div')
-	            .attr('class', 'top-toolbar fillD')
-	            .call(uiTopToolbar(context));
+	      if (_nodeIDs.length === 2 && (wayNodeIDs.indexOf(_nodeIDs[0]) === -1 || wayNodeIDs.indexOf(_nodeIDs[1]) === -1)) return null;
 
-	        content
-	            .append('div')
-	            .attr('class', 'main-map')
-	            .attr('dir', 'ltr')
-	            .call(map);
+	      if (_nodeIDs.length) {
+	        // If we're only straightenting between two points, we only need that extent visible
+	        _extent = utilTotalExtent(_nodeIDs, context.graph());
+	      }
 
-	        content
-	            .append('div')
-	            .attr('class', 'spinner')
-	            .call(uiSpinner(context));
+	      _geometry = 'line';
+	      return actionStraightenWay(selectedIDs, context.projection);
+	    }
 
-	        // Add attribution and footer
-	        var about = content
-	            .append('div')
-	            .attr('class', 'map-footer');
+	    return null;
+	  }
 
-	        about
-	            .append('div')
-	            .attr('class', 'attribution-wrap')
-	            .attr('dir', 'ltr')
-	            .call(uiAttribution(context));
+	  function operation() {
+	    if (!_action) return;
+	    context.perform(_action, operation.annotation());
+	    window.setTimeout(function () {
+	      context.validator().validate();
+	    }, 300); // after any transition
+	  }
 
-	        about
-	            .append('div')
-	            .attr('class', 'api-status')
-	            .call(uiStatus(context));
+	  operation.available = function () {
+	    return Boolean(_action);
+	  };
 
+	  operation.disabled = function () {
+	    var reason = _action.disabled(context.graph());
 
-	        var footer = about
-	            .append('div')
-	            .attr('class', 'map-footer-bar fillD');
+	    if (reason) {
+	      return reason;
+	    } else if (_extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    } else if (someMissing()) {
+	      return 'not_downloaded';
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
+	    }
 
-	        footer
-	            .append('div')
-	            .attr('class', 'flash-wrap footer-hide');
+	    return false;
 
-	        var footerWrap = footer
-	            .append('div')
-	            .attr('class', 'main-footer-wrap footer-show');
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	        footerWrap
-	            .append('div')
-	            .attr('class', 'scale-block')
-	            .call(uiScale(context));
+	      if (osm) {
+	        var missing = _coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	        var aboutList = footerWrap
-	            .append('div')
-	            .attr('class', 'info-block')
-	            .append('ul')
-	            .attr('class', 'map-footer-list');
-
-	        if (!context.embed()) {
-	            aboutList
-	                .call(uiAccount(context));
-	        }
-
-	        aboutList
-	            .append('li')
-	            .attr('class', 'version')
-	            .call(uiVersion(context));
-
-	        var issueLinks = aboutList
-	            .append('li');
-
-	        issueLinks
-	            .append('a')
-	            .attr('target', '_blank')
-	            .attr('href', 'https://github.com/openstreetmap/iD/issues')
-	            .call(svgIcon('#iD-icon-bug', 'light'))
-	            .call(uiTooltip().title(_t('report_a_bug')).placement('top'));
-
-	        issueLinks
-	            .append('a')
-	            .attr('target', '_blank')
-	            .attr('href', 'https://github.com/openstreetmap/iD/blob/develop/CONTRIBUTING.md#translating')
-	            .call(svgIcon('#iD-icon-translate', 'light'))
-	            .call(uiTooltip().title(_t('help_translate')).placement('top'));
-
-	        aboutList
-	            .append('li')
-	            .attr('class', 'feature-warning')
-	            .attr('tabindex', -1)
-	            .call(uiFeatureInfo(context));
-
-	        aboutList
-	            .append('li')
-	            .attr('class', 'issues-info')
-	            .attr('tabindex', -1)
-	            .call(uiIssuesInfo(context));
-
-	        var apiConnections = context.apiConnections();
-	        if (apiConnections && apiConnections.length > 1) {
-	            aboutList
-	                .append('li')
-	                .attr('class', 'source-switch')
-	                .attr('tabindex', -1)
-	                .call(uiSourceSwitch(context)
-	                    .keys(apiConnections)
-	                );
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
 	        }
+	      }
 
-	        aboutList
-	            .append('li')
-	            .attr('class', 'user-list')
-	            .attr('tabindex', -1)
-	            .call(uiContributors(context));
-
+	      return false;
+	    }
+	  };
 
-	        // Setup map dimensions and move map to initial center/zoom.
-	        // This should happen after .main-content and toolbars exist.
-	        ui.onResize();
-	        map.redrawEnable(true);
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.straighten.' + disable + '.' + _amount) : _t('operations.straighten.description.' + _geometry + (_wayIDs.length === 1 ? '' : 's'));
+	  };
 
-	        ui.hash = behaviorHash(context);
-	        ui.hash();
-	        if (!ui.hash.hadHash) {
-	            map.centerZoom([0, 0], 2);
-	        }
+	  operation.annotation = function () {
+	    return _t('operations.straighten.annotation.' + _geometry, {
+	      n: _wayIDs.length ? _wayIDs.length : _nodeIDs.length
+	    });
+	  };
 
+	  operation.id = 'straighten';
+	  operation.keys = [_t('operations.straighten.key')];
+	  operation.title = _t('operations.straighten.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	        var overMap = content
-	            .append('div')
-	            .attr('class', 'over-map');
+	var Operations = /*#__PURE__*/Object.freeze({
+		__proto__: null,
+		operationCircularize: operationCircularize,
+		operationContinue: operationContinue,
+		operationCopy: operationCopy,
+		operationDelete: operationDelete,
+		operationDisconnect: operationDisconnect,
+		operationDowngrade: operationDowngrade,
+		operationExtract: operationExtract,
+		operationMerge: operationMerge,
+		operationMove: operationMove,
+		operationOrthogonalize: operationOrthogonalize,
+		operationPaste: operationPaste,
+		operationReflectShort: operationReflectShort,
+		operationReflectLong: operationReflectLong,
+		operationReverse: operationReverse,
+		operationRotate: operationRotate,
+		operationSplit: operationSplit,
+		operationStraighten: operationStraighten
+	});
 
-	        // Map controls
-	        var controls = overMap
-	            .append('div')
-	            .attr('class', 'map-controls');
+	function modeSelect(context, selectedIDs) {
+	  var mode = {
+	    id: 'select',
+	    button: 'browse'
+	  };
+	  var keybinding = utilKeybinding('select');
 
-	        controls
-	            .append('div')
-	            .attr('class', 'map-control zoombuttons')
-	            .call(uiZoom(context));
+	  var _breatheBehavior = behaviorBreathe();
 
-	        controls
-	            .append('div')
-	            .attr('class', 'map-control zoom-to-selection-control')
-	            .call(uiZoomToSelection(context));
+	  var _modeDragNode = modeDragNode(context);
 
-	        controls
-	            .append('div')
-	            .attr('class', 'map-control geolocate-control')
-	            .call(uiGeolocate(context));
+	  var _selectBehavior;
 
-	        // Add panes
-	        // This should happen after map is initialized, as some require surface()
-	        var panes = overMap
-	            .append('div')
-	            .attr('class', 'map-panes');
-
-	        var uiPanes = [
-	            uiPaneBackground(context),
-	            uiPaneMapData(context),
-	            uiPaneIssues(context),
-	            uiPanePreferences(context),
-	            uiPaneHelp(context)
-	        ];
+	  var _behaviors = [];
+	  var _operations = [];
+	  var _newFeature = false;
+	  var _follow = false; // `_focusedParentWayId` is used when we visit a vertex with multiple
+	  // parents, and we want to remember which parent line we started on.
 
-	        uiPanes.forEach(function(pane) {
-	            controls
-	                .append('div')
-	                .attr('class', 'map-control map-pane-control ' + pane.id + '-control')
-	                .call(pane.renderToggleButton);
+	  var _focusedParentWayId;
 
-	            panes
-	                .call(pane.renderPane);
-	        });
+	  var _focusedVertexIds;
 
-	        ui.info = uiInfo(context);
+	  function singular() {
+	    if (selectedIDs && selectedIDs.length === 1) {
+	      return context.hasEntity(selectedIDs[0]);
+	    }
+	  }
 
-	        // Add absolutely-positioned elements that sit on top of the map
-	        // This should happen after the map is ready (center/zoom)
-	        overMap
-	            .call(uiMapInMap(context))
-	            .call(ui.info)
-	            .call(uiNotice(context));
+	  function selectedEntities() {
+	    return selectedIDs.map(function (id) {
+	      return context.hasEntity(id);
+	    }).filter(Boolean);
+	  }
 
+	  function checkSelectedIDs() {
+	    var ids = [];
 
-	        overMap
-	            .append('div')
-	            .attr('class', 'photoviewer')
-	            .classed('al', true)       // 'al'=left,  'ar'=right
-	            .classed('hide', true)
-	            .call(ui.photoviewer);
+	    if (Array.isArray(selectedIDs)) {
+	      ids = selectedIDs.filter(function (id) {
+	        return context.hasEntity(id);
+	      });
+	    }
 
+	    if (!ids.length) {
+	      context.enter(modeBrowse(context));
+	      return false;
+	    } else if (selectedIDs.length > 1 && ids.length === 1 || selectedIDs.length === 1 && ids.length > 1) {
+	      // switch between single- and multi-select UI
+	      context.enter(modeSelect(context, ids));
+	      return false;
+	    }
 
-	        // Bind events
-	        window.onbeforeunload = function() {
-	            return context.save();
-	        };
-	        window.onunload = function() {
-	            context.history().unlock();
-	        };
+	    selectedIDs = ids;
+	    return true;
+	  } // find the parent ways for nextVertex, previousVertex, and selectParent
 
-	        select(window)
-	            .on('resize.editor', ui.onResize);
-
-
-	        var panPixels = 80;
-	        context.keybinding()
-	            .on('⌫', function() { event.preventDefault(); })
-	            .on([_t('sidebar.key'), '`', '²', '@'], ui.sidebar.toggle)   // #5663, #6864 - common QWERTY, AZERTY
-	            .on('←', pan([panPixels, 0]))
-	            .on('↑', pan([0, panPixels]))
-	            .on('→', pan([-panPixels, 0]))
-	            .on('↓', pan([0, -panPixels]))
-	            .on(uiCmd('⌘←'), pan([map.dimensions()[0], 0]))
-	            .on(uiCmd('⌘↑'), pan([0, map.dimensions()[1]]))
-	            .on(uiCmd('⌘→'), pan([-map.dimensions()[0], 0]))
-	            .on(uiCmd('⌘↓'), pan([0, -map.dimensions()[1]]))
-	            .on(uiCmd('⌘' + _t('background.key')), function quickSwitch() {
-	                if (event) {
-	                    event.stopImmediatePropagation();
-	                    event.preventDefault();
-	                }
-	                var previousBackground = context.background().findSource(corePreferences('background-last-used-toggle'));
-	                if (previousBackground) {
-	                    var currentBackground = context.background().baseLayerSource();
-	                    corePreferences('background-last-used-toggle', currentBackground.id);
-	                    corePreferences('background-last-used', previousBackground.id);
-	                    context.background().baseLayerSource(previousBackground);
-	                }
-	            })
-	            .on(_t('area_fill.wireframe.key'), function toggleWireframe() {
-	                event.preventDefault();
-	                event.stopPropagation();
-	                context.map().toggleWireframe();
-	            })
-	            .on(uiCmd('⌥' + _t('area_fill.wireframe.key')), function toggleOsmData() {
-	                event.preventDefault();
-	                event.stopPropagation();
-
-	                // Don't allow layer changes while drawing - #6584
-	                var mode = context.mode();
-	                if (mode && /^draw/.test(mode.id)) { return; }
-
-	                var layer = context.layers().layer('osm');
-	                if (layer) {
-	                    layer.enabled(!layer.enabled());
-	                    if (!layer.enabled()) {
-	                        context.enter(modeBrowse(context));
-	                    }
-	                }
-	            })
-	            .on(_t('map_data.highlight_edits.key'), function toggleHighlightEdited() {
-	                event.preventDefault();
-	                context.map().toggleHighlightEdited();
-	            });
 
-	        context
-	            .on('enter.editor', function(entered) {
-	                container
-	                    .classed('mode-' + entered.id, true);
-	            })
-	            .on('exit.editor', function(exited) {
-	                container
-	                    .classed('mode-' + exited.id, false);
-	            });
+	  function parentWaysIdsOfSelection(onlyCommonParents) {
+	    var graph = context.graph();
+	    var parents = [];
 
-	        context.enter(modeBrowse(context));
+	    for (var i = 0; i < selectedIDs.length; i++) {
+	      var entity = context.hasEntity(selectedIDs[i]);
 
-	        if (!_initCounter++) {
-	            if (!ui.hash.startWalkthrough) {
-	                context.container()
-	                    .call(uiSplash(context))
-	                    .call(uiRestore(context));
-	            }
+	      if (!entity || entity.geometry(graph) !== 'vertex') {
+	        return []; // selection includes some non-vertices
+	      }
 
-	            context.container()
-	                .call(uiShortcuts(context));
-	        }
+	      var currParents = graph.parentWays(entity).map(function (w) {
+	        return w.id;
+	      });
 
-	        var osm = context.connection();
-	        var auth = uiLoading(context).message(_t('loading_auth')).blocking(true);
+	      if (!parents.length) {
+	        parents = currParents;
+	        continue;
+	      }
 
-	        if (osm && auth) {
-	            osm
-	                .on('authLoading.ui', function() {
-	                    context.container()
-	                        .call(auth);
-	                })
-	                .on('authDone.ui', function() {
-	                    auth.close();
-	                });
-	        }
+	      parents = (onlyCommonParents ? utilArrayIntersection : utilArrayUnion)(parents, currParents);
 
-	        _initCounter++;
+	      if (!parents.length) {
+	        return [];
+	      }
+	    }
 
-	        if (ui.hash.startWalkthrough) {
-	            ui.hash.startWalkthrough = false;
-	            context.container().call(uiIntro(context));
-	        }
+	    return parents;
+	  } // find the child nodes for selected ways
 
 
-	        function pan(d) {
-	            return function() {
-	                if (event.shiftKey) { return; }
-	                if (context.container().select('.combobox').size()) { return; }
-	                event.preventDefault();
-	                context.map().pan(d, 100);
-	            };
-	        }
+	  function childNodeIdsOfSelection(onlyCommon) {
+	    var graph = context.graph();
+	    var childs = [];
 
-	    }
+	    for (var i = 0; i < selectedIDs.length; i++) {
+	      var entity = context.hasEntity(selectedIDs[i]);
 
+	      if (!entity || !['area', 'line'].includes(entity.geometry(graph))) {
+	        return []; // selection includes non-area/non-line
+	      }
 
-	    var ui = {};
+	      var currChilds = graph.childNodes(entity).map(function (node) {
+	        return node.id;
+	      });
 
-	    var _loadPromise;
-	    // renders the iD interface into the container node
-	    ui.ensureLoaded = function () {
+	      if (!childs.length) {
+	        childs = currChilds;
+	        continue;
+	      }
 
-	        if (_loadPromise) { return _loadPromise; }
+	      childs = (onlyCommon ? utilArrayIntersection : utilArrayUnion)(childs, currChilds);
 
-	        return _loadPromise = Promise.all([
-	                // must have strings and presets before loading the UI
-	                _mainLocalizer.ensureLoaded(),
-	                _mainPresetIndex.ensureLoaded()
-	            ])
-	            .then(function () {
-	                if (!context.container().empty()) { render(context.container()); }
-	            })
-	            .catch(function (err) { return console.error(err); });  // eslint-disable-line
-	    };
+	      if (!childs.length) {
+	        return [];
+	      }
+	    }
 
+	    return childs;
+	  }
 
-	    // `ui.restart()` will destroy and rebuild the entire iD interface,
-	    // for example to switch the locale while iD is running.
-	    ui.restart = function() {
-	        context.keybinding().clear();
+	  function checkFocusedParent() {
+	    if (_focusedParentWayId) {
+	      var parents = parentWaysIdsOfSelection(true);
+	      if (parents.indexOf(_focusedParentWayId) === -1) _focusedParentWayId = null;
+	    }
+	  }
 
-	        _loadPromise = null;
+	  function parentWayIdForVertexNavigation() {
+	    var parentIds = parentWaysIdsOfSelection(true);
 
-	        context.container().selectAll('*').remove();
+	    if (_focusedParentWayId && parentIds.indexOf(_focusedParentWayId) !== -1) {
+	      // prefer the previously seen parent
+	      return _focusedParentWayId;
+	    }
 
-	        ui.ensureLoaded();
-	    };
+	    return parentIds.length ? parentIds[0] : null;
+	  }
 
-	    ui.lastPointerType = function() {
-	        return _lastPointerType;
-	    };
+	  mode.selectedIDs = function (val) {
+	    if (!arguments.length) return selectedIDs;
+	    selectedIDs = val;
+	    return mode;
+	  };
 
-	    ui.flash = uiFlash(context);
+	  mode.zoomToSelected = function () {
+	    context.map().zoomToEase(selectedEntities());
+	  };
 
-	    ui.sidebar = uiSidebar(context);
+	  mode.newFeature = function (val) {
+	    if (!arguments.length) return _newFeature;
+	    _newFeature = val;
+	    return mode;
+	  };
 
-	    ui.photoviewer = uiPhotoviewer(context);
+	  mode.selectBehavior = function (val) {
+	    if (!arguments.length) return _selectBehavior;
+	    _selectBehavior = val;
+	    return mode;
+	  };
 
-	    ui.onResize = function(withPan) {
-	        var map = context.map();
+	  mode.follow = function (val) {
+	    if (!arguments.length) return _follow;
+	    _follow = val;
+	    return mode;
+	  };
 
-	        // Recalc dimensions of map and sidebar.. (`true` = force recalc)
-	        // This will call `getBoundingClientRect` and trigger reflow,
-	        //  but the values will be cached for later use.
-	        var mapDimensions = utilGetDimensions(context.container().select('.main-content'), true);
-	        utilGetDimensions(context.container().select('.sidebar'), true);
+	  function loadOperations() {
+	    _operations.forEach(function (operation) {
+	      if (operation.behavior) {
+	        context.uninstall(operation.behavior);
+	      }
+	    });
 
-	        if (withPan !== undefined) {
-	            map.redrawEnable(false);
-	            map.pan(withPan);
-	            map.redrawEnable(true);
-	        }
-	        map.dimensions(mapDimensions);
+	    _operations = Object.values(Operations).map(function (o) {
+	      return o(context, selectedIDs);
+	    }).filter(function (o) {
+	      return o.id !== 'delete' && o.id !== 'downgrade' && o.id !== 'copy';
+	    }).concat([// group copy/downgrade/delete operation together at the end of the list
+	    operationCopy(context, selectedIDs), operationDowngrade(context, selectedIDs), operationDelete(context, selectedIDs)]).filter(function (operation) {
+	      return operation.available();
+	    });
 
-	        ui.photoviewer.onMapResize();
+	    _operations.forEach(function (operation) {
+	      if (operation.behavior) {
+	        context.install(operation.behavior);
+	      }
+	    }); // remove any displayed menu
 
-	        // check if header or footer have overflowed
-	        ui.checkOverflow('.top-toolbar');
-	        ui.checkOverflow('.map-footer-bar');
 
-	        // Use outdated code so it works on Explorer
-	        var resizeWindowEvent = document.createEvent('Event');
+	    context.ui().closeEditMenu();
+	  }
 
-	        resizeWindowEvent.initEvent('resizeWindow', true, true);
+	  mode.operations = function () {
+	    return _operations;
+	  };
 
-	        document.dispatchEvent(resizeWindowEvent);
-	    };
+	  mode.enter = function () {
+	    if (!checkSelectedIDs()) return;
+	    context.features().forceVisible(selectedIDs);
 
+	    _modeDragNode.restoreSelectedIDs(selectedIDs);
 
-	    // Call checkOverflow when resizing or whenever the contents change.
-	    ui.checkOverflow = function(selector, reset) {
-	        if (reset) {
-	            delete _needWidth[selector];
-	        }
+	    loadOperations();
 
-	        var element = select(selector);
-	        var scrollWidth = element.property('scrollWidth');
-	        var clientWidth = element.property('clientWidth');
-	        var needed = _needWidth[selector] || scrollWidth;
+	    if (!_behaviors.length) {
+	      if (!_selectBehavior) _selectBehavior = behaviorSelect(context);
+	      _behaviors = [behaviorPaste(context), _breatheBehavior, behaviorHover(context).on('hover', context.ui().sidebar.hoverModeSelect), _selectBehavior, behaviorLasso(context), _modeDragNode.behavior, modeDragNote(context).behavior];
+	    }
 
-	        if (scrollWidth > clientWidth) {    // overflow happening
-	            element.classed('narrow', true);
-	            if (!_needWidth[selector]) {
-	                _needWidth[selector] = scrollWidth;
-	            }
+	    _behaviors.forEach(context.install);
 
-	        } else if (scrollWidth >= needed) {
-	            element.classed('narrow', false);
-	        }
-	    };
+	    keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on(['[', 'pgup'], previousVertex).on([']', 'pgdown'], nextVertex).on(['{', uiCmd('⌘['), 'home'], firstVertex).on(['}', uiCmd('⌘]'), 'end'], lastVertex).on(uiCmd('⇧←'), nudgeSelection([-10, 0])).on(uiCmd('⇧↑'), nudgeSelection([0, -10])).on(uiCmd('⇧→'), nudgeSelection([10, 0])).on(uiCmd('⇧↓'), nudgeSelection([0, 10])).on(uiCmd('⇧⌥←'), nudgeSelection([-100, 0])).on(uiCmd('⇧⌥↑'), nudgeSelection([0, -100])).on(uiCmd('⇧⌥→'), nudgeSelection([100, 0])).on(uiCmd('⇧⌥↓'), nudgeSelection([0, 100])).on(utilKeybinding.plusKeys.map(function (key) {
+	      return uiCmd('⇧' + key);
+	    }), scaleSelection(1.05)).on(utilKeybinding.plusKeys.map(function (key) {
+	      return uiCmd('⇧⌥' + key);
+	    }), scaleSelection(Math.pow(1.05, 5))).on(utilKeybinding.minusKeys.map(function (key) {
+	      return uiCmd('⇧' + key);
+	    }), scaleSelection(1 / 1.05)).on(utilKeybinding.minusKeys.map(function (key) {
+	      return uiCmd('⇧⌥' + key);
+	    }), scaleSelection(1 / Math.pow(1.05, 5))).on(['\\', 'pause'], focusNextParent).on(uiCmd('⌘↑'), selectParent).on(uiCmd('⌘↓'), selectChild).on('⎋', esc, true);
+	    select(document).call(keybinding);
+	    context.ui().sidebar.select(selectedIDs, _newFeature);
+	    context.history().on('change.select', function () {
+	      loadOperations(); // reselect after change in case relation members were removed or added
 
-	    ui.togglePanes = function(showPane) {
-	        var shownPanes = context.container().selectAll('.map-pane.shown');
+	      selectElements();
+	    }).on('undone.select', checkSelectedIDs).on('redone.select', checkSelectedIDs);
+	    context.map().on('drawn.select', selectElements).on('crossEditableZoom.select', function () {
+	      selectElements();
 
-	        var side = _mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left';
+	      _breatheBehavior.restartIfNeeded(context.surface());
+	    });
+	    context.map().doubleUpHandler().on('doubleUp.modeSelect', didDoubleUp);
+	    selectElements();
 
-	        shownPanes
-	            .classed('shown', false);
+	    if (_follow) {
+	      var extent = geoExtent();
+	      var graph = context.graph();
+	      selectedIDs.forEach(function (id) {
+	        var entity = context.entity(id);
 
-	        context.container().selectAll('.map-pane-control button')
-	            .classed('active', false);
+	        extent._extend(entity.extent(graph));
+	      });
+	      var loc = extent.center();
+	      context.map().centerEase(loc); // we could enter the mode multiple times, so reset follow for next time
 
-	        if (showPane) {
-	            shownPanes
-	                .style('display', 'none')
-	                .style(side, '-500px');
+	      _follow = false;
+	    }
 
-	            context.container().selectAll('.' + showPane.attr('pane') + '-control button')
-	                .classed('active', true);
+	    function nudgeSelection(delta) {
+	      return function () {
+	        // prevent nudging during low zoom selection
+	        if (!context.map().withinEditableZoom()) return;
+	        var moveOp = operationMove(context, selectedIDs);
 
-	            showPane
-	                .classed('shown', true)
-	                .style('display', 'block');
-	            if (shownPanes.empty()) {
-	                showPane
-	                    .style('display', 'block')
-	                    .style(side, '-500px')
-	                    .transition()
-	                    .duration(200)
-	                    .style(side, '0px');
-	            } else {
-	                showPane
-	                    .style(side, '0px');
-	            }
+	        if (moveOp.disabled()) {
+	          context.ui().flash.duration(4000).iconName('#iD-operation-' + moveOp.id).iconClass('operation disabled').label(moveOp.tooltip)();
 	        } else {
-	            shownPanes
-	                .style('display', 'block')
-	                .style(side, '0px')
-	                .transition()
-	                .duration(200)
-	                .style(side, '-500px')
-	                .on('end', function() {
-	                    select(this).style('display', 'none');
-	                });
+	          context.perform(actionMove(selectedIDs, delta, context.projection), moveOp.annotation());
+	          context.validator().validate();
 	        }
-	    };
+	      };
+	    }
 
+	    function scaleSelection(factor) {
+	      return function () {
+	        // prevent scaling during low zoom selection
+	        if (!context.map().withinEditableZoom()) return;
+	        var nodes = utilGetAllNodes(selectedIDs, context.graph());
+	        var isUp = factor > 1; // can only scale if multiple nodes are selected
+
+	        if (nodes.length <= 1) return;
+	        var extent = utilTotalExtent(selectedIDs, context.graph()); // These disabled checks would normally be handled by an operation
+	        // object, but we don't want an actual scale operation at this point.
+
+	        function scalingDisabled() {
+	          if (tooSmall()) {
+	            return 'too_small';
+	          } else if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+	            return 'too_large';
+	          } else if (someMissing() || selectedIDs.some(incompleteRelation)) {
+	            return 'not_downloaded';
+	          } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	            return 'connected_to_hidden';
+	          }
 
-	    var _editMenu = uiEditMenu(context);
+	          return false;
 
-	    ui.editMenu = function() {
-	        return _editMenu;
-	    };
+	          function tooSmall() {
+	            if (isUp) return false;
+	            var dLon = Math.abs(extent[1][0] - extent[0][0]);
+	            var dLat = Math.abs(extent[1][1] - extent[0][1]);
+	            return dLon < geoMetersToLon(1, extent[1][1]) && dLat < geoMetersToLat(1);
+	          }
 
-	    ui.showEditMenu = function(anchorPoint, triggerType, operations) {
+	          function someMissing() {
+	            if (context.inIntro()) return false;
+	            var osm = context.connection();
 
-	        // remove any displayed menu
-	        ui.closeEditMenu();
+	            if (osm) {
+	              var missing = nodes.filter(function (n) {
+	                return !osm.isDataLoaded(n.loc);
+	              });
 
-	        if (!operations && context.mode().operations) { operations = context.mode().operations(); }
-	        if (!operations || !operations.length) { return; }
+	              if (missing.length) {
+	                missing.forEach(function (loc) {
+	                  context.loadTileAtLoc(loc);
+	                });
+	                return true;
+	              }
+	            }
 
-	        // disable menu if in wide selection, for example
-	        if (!context.map().editableDataEnabled()) { return; }
+	            return false;
+	          }
 
-	        var surfaceNode = context.surface().node();
-	        if (surfaceNode.focus) {   // FF doesn't support it
-	            // focus the surface or else clicking off the menu may not trigger modeBrowse
-	            surfaceNode.focus();
+	          function incompleteRelation(id) {
+	            var entity = context.entity(id);
+	            return entity.type === 'relation' && !entity.isComplete(context.graph());
+	          }
 	        }
 
-	        operations.forEach(function(operation) {
-	            if (operation.point) { operation.point(anchorPoint); }
-	        });
+	        var disabled = scalingDisabled();
 
-	        _editMenu
-	            .anchorLoc(anchorPoint)
-	            .triggerType(triggerType)
-	            .operations(operations);
+	        if (disabled) {
+	          var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+	          context.ui().flash.duration(4000).iconName('#iD-icon-no').iconClass('operation disabled').label(_t('operations.scale.' + disabled + '.' + multi))();
+	        } else {
+	          var pivot = context.projection(extent.center());
+	          var annotation = _t('operations.scale.annotation.' + (isUp ? 'up' : 'down') + '.feature', {
+	            n: selectedIDs.length
+	          });
+	          context.perform(actionScale(selectedIDs, pivot, factor, context.projection), annotation);
+	          context.validator().validate();
+	        }
+	      };
+	    }
 
-	        // render the menu
-	        context.map().supersurface.call(_editMenu);
-	    };
+	    function didDoubleUp(d3_event, loc) {
+	      if (!context.map().withinEditableZoom()) return;
+	      var target = select(d3_event.target);
+	      var datum = target.datum();
+	      var entity = datum && datum.properties && datum.properties.entity;
+	      if (!entity) return;
+
+	      if (entity instanceof osmWay && target.classed('target')) {
+	        var choice = geoChooseEdge(context.graph().childNodes(entity), loc, context.projection);
+	        var prev = entity.nodes[choice.index - 1];
+	        var next = entity.nodes[choice.index];
+	        context.perform(actionAddMidpoint({
+	          loc: choice.loc,
+	          edge: [prev, next]
+	        }, osmNode()), _t('operations.add.annotation.vertex'));
+	        context.validator().validate();
+	      } else if (entity.type === 'midpoint') {
+	        context.perform(actionAddMidpoint({
+	          loc: entity.loc,
+	          edge: entity.edge
+	        }, osmNode()), _t('operations.add.annotation.vertex'));
+	        context.validator().validate();
+	      }
+	    }
 
-	    ui.closeEditMenu = function() {
-	        // remove any existing menu no matter how it was added
-	        context.map().supersurface
-	            .select('.edit-menu').remove();
-	    };
+	    function selectElements() {
+	      if (!checkSelectedIDs()) return;
+	      var surface = context.surface();
+	      surface.selectAll('.selected-member').classed('selected-member', false);
+	      surface.selectAll('.selected').classed('selected', false);
+	      surface.selectAll('.related').classed('related', false); // reload `_focusedParentWayId` based on the current selection
 
+	      checkFocusedParent();
 
-	    var _saveLoading = select(null);
+	      if (_focusedParentWayId) {
+	        surface.selectAll(utilEntitySelector([_focusedParentWayId])).classed('related', true);
+	      }
 
-	    context.uploader()
-	        .on('saveStarted.ui', function() {
-	            _saveLoading = uiLoading(context)
-	                .message(_t('save.uploading'))
-	                .blocking(true);
-	            context.container().call(_saveLoading);  // block input during upload
-	        })
-	        .on('saveEnded.ui', function() {
-	            _saveLoading.close();
-	            _saveLoading = select(null);
-	        });
+	      if (context.map().withinEditableZoom()) {
+	        // Apply selection styling if not in wide selection
+	        surface.selectAll(utilDeepMemberSelector(selectedIDs, context.graph(), true
+	        /* skipMultipolgonMembers */
+	        )).classed('selected-member', true);
+	        surface.selectAll(utilEntityOrDeepMemberSelector(selectedIDs, context.graph())).classed('selected', true);
+	      }
+	    }
 
-	    return ui;
-	}
+	    function esc() {
+	      if (context.container().select('.combobox').size()) return;
+	      context.enter(modeBrowse(context));
+	    }
 
-	function coreContext() {
-	  var this$1 = this;
+	    function firstVertex(d3_event) {
+	      d3_event.preventDefault();
+	      var entity = singular();
+	      var parentId = parentWayIdForVertexNavigation();
+	      var way;
 
-	  var dispatch$1 = dispatch('enter', 'exit', 'change');
-	  var context = utilRebind({}, dispatch$1, 'on');
-	  var _deferred = new Set();
+	      if (entity && entity.type === 'way') {
+	        way = entity;
+	      } else if (parentId) {
+	        way = context.entity(parentId);
+	      }
 
-	  context.version = '2.18.5';
-	  context.privacyVersion = '20200407';
+	      _focusedParentWayId = way && way.id;
 
-	  // iD will alter the hash so cache the parameters intended to setup the session
-	  context.initialHashParams = window.location.hash ? utilStringQs(window.location.hash) : {};
+	      if (way) {
+	        context.enter(mode.selectedIDs([way.first()]).follow(true));
+	      }
+	    }
 
-	  context.isFirstSession = !corePreferences('sawSplash') && !corePreferences('sawPrivacyVersion');
+	    function lastVertex(d3_event) {
+	      d3_event.preventDefault();
+	      var entity = singular();
+	      var parentId = parentWayIdForVertexNavigation();
+	      var way;
 
+	      if (entity && entity.type === 'way') {
+	        way = entity;
+	      } else if (parentId) {
+	        way = context.entity(parentId);
+	      }
 
-	  /* Changeset */
-	  // An osmChangeset object. Not loaded until needed.
-	  context.changeset = null;
+	      _focusedParentWayId = way && way.id;
 
-	  var _defaultChangesetComment = context.initialHashParams.comment;
-	  var _defaultChangesetSource = context.initialHashParams.source;
-	  var _defaultChangesetHashtags = context.initialHashParams.hashtags;
-	  context.defaultChangesetComment = function(val) {
-	    if (!arguments.length) { return _defaultChangesetComment; }
-	    _defaultChangesetComment = val;
-	    return context;
-	  };
-	  context.defaultChangesetSource = function(val) {
-	    if (!arguments.length) { return _defaultChangesetSource; }
-	    _defaultChangesetSource = val;
-	    return context;
-	  };
-	  context.defaultChangesetHashtags = function(val) {
-	    if (!arguments.length) { return _defaultChangesetHashtags; }
-	    _defaultChangesetHashtags = val;
-	    return context;
-	  };
+	      if (way) {
+	        context.enter(mode.selectedIDs([way.last()]).follow(true));
+	      }
+	    }
 
-	  /* Document title */
-	  /* (typically shown as the label for the browser window/tab) */
+	    function previousVertex(d3_event) {
+	      d3_event.preventDefault();
+	      var parentId = parentWayIdForVertexNavigation();
+	      _focusedParentWayId = parentId;
+	      if (!parentId) return;
+	      var way = context.entity(parentId);
+	      var length = way.nodes.length;
+	      var curr = way.nodes.indexOf(selectedIDs[0]);
+	      var index = -1;
+
+	      if (curr > 0) {
+	        index = curr - 1;
+	      } else if (way.isClosed()) {
+	        index = length - 2;
+	      }
 
-	  // If true, iD will update the title based on what the user is doing
-	  var _setsDocumentTitle = true;
-	  context.setsDocumentTitle = function(val) {
-	    if (!arguments.length) { return _setsDocumentTitle; }
-	    _setsDocumentTitle = val;
-	    return context;
-	  };
-	  // The part of the title that is always the same
-	  var _documentTitleBase = document.title;
-	  context.documentTitleBase = function(val) {
-	    if (!arguments.length) { return _documentTitleBase; }
-	    _documentTitleBase = val;
-	    return context;
-	  };
+	      if (index !== -1) {
+	        context.enter(mode.selectedIDs([way.nodes[index]]).follow(true));
+	      }
+	    }
 
+	    function nextVertex(d3_event) {
+	      d3_event.preventDefault();
+	      var parentId = parentWayIdForVertexNavigation();
+	      _focusedParentWayId = parentId;
+	      if (!parentId) return;
+	      var way = context.entity(parentId);
+	      var length = way.nodes.length;
+	      var curr = way.nodes.indexOf(selectedIDs[0]);
+	      var index = -1;
+
+	      if (curr < length - 1) {
+	        index = curr + 1;
+	      } else if (way.isClosed()) {
+	        index = 0;
+	      }
 
-	  /* User interface and keybinding */
-	  var _ui;
-	  context.ui = function () { return _ui; };
-	  context.lastPointerType = function () { return _ui.lastPointerType(); };
+	      if (index !== -1) {
+	        context.enter(mode.selectedIDs([way.nodes[index]]).follow(true));
+	      }
+	    }
 
-	  var _keybinding = utilKeybinding('context');
-	  context.keybinding = function () { return _keybinding; };
-	  select(document).call(_keybinding);
+	    function focusNextParent(d3_event) {
+	      d3_event.preventDefault();
+	      var parents = parentWaysIdsOfSelection(true);
+	      if (!parents || parents.length < 2) return;
+	      var index = parents.indexOf(_focusedParentWayId);
 
+	      if (index < 0 || index > parents.length - 2) {
+	        _focusedParentWayId = parents[0];
+	      } else {
+	        _focusedParentWayId = parents[index + 1];
+	      }
 
-	  /* Straight accessors. Avoid using these if you can. */
-	  // Instantiate the connection here because it doesn't require passing in
-	  // `context` and it's needed for pre-init calls like `preauth`
-	  var _connection = services.osm;
-	  var _history;
-	  var _validator;
-	  var _uploader;
-	  context.connection = function () { return _connection; };
-	  context.history = function () { return _history; };
-	  context.validator = function () { return _validator; };
-	  context.uploader = function () { return _uploader; };
+	      var surface = context.surface();
+	      surface.selectAll('.related').classed('related', false);
 
-	  /* Connection */
-	  context.preauth = function (options) {
-	    if (_connection) {
-	      _connection.switch(options);
+	      if (_focusedParentWayId) {
+	        surface.selectAll(utilEntitySelector([_focusedParentWayId])).classed('related', true);
+	      }
 	    }
-	    return context;
-	  };
 
-	  /* connection options for source switcher (optional) */
-	  var _apiConnections;
-	  context.apiConnections = function(val) {
-	    if (!arguments.length) { return _apiConnections; }
-	    _apiConnections = val;
-	    return context;
-	  };
+	    function selectParent(d3_event) {
+	      d3_event.preventDefault();
+	      var currentSelectedIds = mode.selectedIDs();
+	      var parentIds = _focusedParentWayId ? [_focusedParentWayId] : parentWaysIdsOfSelection(false);
+	      if (!parentIds.length) return;
+	      context.enter(mode.selectedIDs(parentIds)); // set this after re-entering the selection since we normally want it cleared on exit
 
+	      _focusedVertexIds = currentSelectedIds;
+	    }
 
-	  // A string or array or locale codes to prefer over the browser's settings
-	  context.locale = function(locale) {
-	    if (!arguments.length) { return _mainLocalizer.localeCode(); }
-	    _mainLocalizer.preferredLocaleCodes(locale);
-	    return context;
+	    function selectChild(d3_event) {
+	      d3_event.preventDefault();
+	      var currentSelectedIds = mode.selectedIDs();
+	      var childIds = _focusedVertexIds ? _focusedVertexIds.filter(function (id) {
+	        return context.hasEntity(id);
+	      }) : childNodeIdsOfSelection(true);
+	      if (!childIds || !childIds.length) return;
+	      if (currentSelectedIds.length === 1) _focusedParentWayId = currentSelectedIds[0];
+	      context.enter(mode.selectedIDs(childIds));
+	    }
 	  };
 
+	  mode.exit = function () {
+	    // we could enter the mode multiple times but it's only new the first time
+	    _newFeature = false;
+	    _focusedVertexIds = null;
 
-	  function afterLoad(cid, callback) {
-	    return function (err, result) {
-	      if (err) {
-	        // 400 Bad Request, 401 Unauthorized, 403 Forbidden..
-	        if (err.status === 400 || err.status === 401 || err.status === 403) {
-	          if (_connection) {
-	            _connection.logout();
-	          }
-	        }
-	        if (typeof callback === 'function') {
-	          callback(err);
-	        }
-	        return;
-
-	      } else if (_connection && _connection.getConnectionId() !== cid) {
-	        if (typeof callback === 'function') {
-	          callback({ message: 'Connection Switched', status: -1 });
-	        }
-	        return;
-
-	      } else {
-	        _history.merge(result.data, result.extent);
-	        if (typeof callback === 'function') {
-	          callback(err, result);
-	        }
-	        return;
-	      }
-	    };
-	  }
-
-
-	  context.loadTiles = function (projection, callback) {
-	    var handle = window.requestIdleCallback(function () {
-	      _deferred.delete(handle);
-	      if (_connection && context.editableDataEnabled()) {
-	        var cid = _connection.getConnectionId();
-	        _connection.loadTiles(projection, afterLoad(cid, callback));
+	    _operations.forEach(function (operation) {
+	      if (operation.behavior) {
+	        context.uninstall(operation.behavior);
 	      }
 	    });
-	    _deferred.add(handle);
-	  };
 
-	  context.loadTileAtLoc = function (loc, callback) {
-	    var handle = window.requestIdleCallback(function () {
-	      _deferred.delete(handle);
-	      if (_connection && context.editableDataEnabled()) {
-	        var cid = _connection.getConnectionId();
-	        _connection.loadTileAtLoc(loc, afterLoad(cid, callback));
-	      }
-	    });
-	    _deferred.add(handle);
-	  };
+	    _operations = [];
 
-	  context.loadEntity = function (entityID, callback) {
-	    if (_connection) {
-	      var cid = _connection.getConnectionId();
-	      _connection.loadEntity(entityID, afterLoad(cid, callback));
+	    _behaviors.forEach(context.uninstall);
+
+	    select(document).call(keybinding.unbind);
+	    context.ui().closeEditMenu();
+	    context.history().on('change.select', null).on('undone.select', null).on('redone.select', null);
+	    var surface = context.surface();
+	    surface.selectAll('.selected-member').classed('selected-member', false);
+	    surface.selectAll('.selected').classed('selected', false);
+	    surface.selectAll('.highlighted').classed('highlighted', false);
+	    surface.selectAll('.related').classed('related', false);
+	    context.map().on('drawn.select', null);
+	    context.ui().sidebar.hide();
+	    context.features().forceVisible([]);
+	    var entity = singular();
+
+	    if (_newFeature && entity && entity.type === 'relation' && // no tags
+	    Object.keys(entity.tags).length === 0 && // no parent relations
+	    context.graph().parentRelations(entity).length === 0 && ( // no members or one member with no role
+	    entity.members.length === 0 || entity.members.length === 1 && !entity.members[0].role)) {
+	      // the user added this relation but didn't edit it at all, so just delete it
+	      var deleteAction = actionDeleteRelation(entity.id, true
+	      /* don't delete untagged members */
+	      );
+	      context.perform(deleteAction, _t('operations.delete.annotation.relation'));
+	      context.validator().validate();
 	    }
 	  };
 
-	  context.zoomToEntity = function (entityID, zoomTo) {
-	    if (zoomTo !== false) {
-	      context.loadEntity(entityID, function (err, result) {
-	        if (err) { return; }
-	        var entity = result.data.find(function (e) { return e.id === entityID; });
-	        if (entity) {
-	          _map.zoomTo(entity);
-	        }
-	      });
-	    }
+	  return mode;
+	}
 
-	    _map.on('drawn.zoomToEntity', function () {
-	      if (!context.hasEntity(entityID)) { return; }
-	      _map.on('drawn.zoomToEntity', null);
-	      context.on('enter.zoomToEntity', null);
-	      context.enter(modeSelect(context, [entityID]));
-	    });
+	function uiLasso(context) {
+	  var group, polygon;
+	  lasso.coordinates = [];
 
-	    context.on('enter.zoomToEntity', function () {
-	      if (_mode.id !== 'browse') {
-	        _map.on('drawn.zoomToEntity', null);
-	        context.on('enter.zoomToEntity', null);
-	      }
-	    });
-	  };
+	  function lasso(selection) {
+	    context.container().classed('lasso', true);
+	    group = selection.append('g').attr('class', 'lasso hide');
+	    polygon = group.append('path').attr('class', 'lasso-path');
+	    group.call(uiToggle(true));
+	  }
 
-	  var _minEditableZoom = 16;
-	  context.minEditableZoom = function(val) {
-	    if (!arguments.length) { return _minEditableZoom; }
-	    _minEditableZoom = val;
-	    if (_connection) {
-	      _connection.tileZoom(val);
+	  function draw() {
+	    if (polygon) {
+	      polygon.data([lasso.coordinates]).attr('d', function (d) {
+	        return 'M' + d.join(' L') + ' Z';
+	      });
 	    }
-	    return context;
+	  }
+
+	  lasso.extent = function () {
+	    return lasso.coordinates.reduce(function (extent, point) {
+	      return extent.extend(geoExtent(point));
+	    }, geoExtent());
 	  };
 
-	  // String length limits in Unicode characters, not JavaScript UTF-16 code units
-	  context.maxCharsForTagKey = function () { return 255; };
-	  context.maxCharsForTagValue = function () { return 255; };
-	  context.maxCharsForRelationRole = function () { return 255; };
+	  lasso.p = function (_) {
+	    if (!arguments.length) return lasso;
+	    lasso.coordinates.push(_);
+	    draw();
+	    return lasso;
+	  };
 
-	  function cleanOsmString(val, maxChars) {
-	    // be lenient with input
-	    if (val === undefined || val === null) {
-	      val = '';
-	    } else {
-	      val = val.toString();
+	  lasso.close = function () {
+	    if (group) {
+	      group.call(uiToggle(false, function () {
+	        select(this).remove();
+	      }));
 	    }
 
-	    // remove whitespace
-	    val = val.trim();
-
-	    // use the canonical form of the string
-	    if (val.normalize) { val = val.normalize('NFC'); }
+	    context.container().classed('lasso', false);
+	  };
 
-	    // trim to the number of allowed characters
-	    return utilUnicodeCharsTruncated(val, maxChars);
-	  }
-	  context.cleanTagKey = function (val) { return cleanOsmString(val, context.maxCharsForTagKey()); };
-	  context.cleanTagValue = function (val) { return cleanOsmString(val, context.maxCharsForTagValue()); };
-	  context.cleanRelationRole = function (val) { return cleanOsmString(val, context.maxCharsForRelationRole()); };
+	  return lasso;
+	}
 
+	function behaviorLasso(context) {
+	  // use pointer events on supported platforms; fallback to mouse events
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	  /* History */
-	  var _inIntro = false;
-	  context.inIntro = function(val) {
-	    if (!arguments.length) { return _inIntro; }
-	    _inIntro = val;
-	    return context;
-	  };
+	  var behavior = function behavior(selection) {
+	    var lasso;
 
-	  // Immediately save the user's history to localstorage, if possible
-	  // This is called someteimes, but also on the `window.onbeforeunload` handler
-	  context.save = function () {
-	    // no history save, no message onbeforeunload
-	    if (_inIntro || context.container().select('.modal').size()) { return; }
+	    function pointerdown(d3_event) {
+	      var button = 0; // left
 
-	    var canSave;
-	    if (_mode && _mode.id === 'save') {
-	      canSave = false;
+	      if (d3_event.button === button && d3_event.shiftKey === true) {
+	        lasso = null;
+	        select(window).on(_pointerPrefix + 'move.lasso', pointermove).on(_pointerPrefix + 'up.lasso', pointerup);
+	        d3_event.stopPropagation();
+	      }
+	    }
 
-	      // Attempt to prevent user from creating duplicate changes - see #5200
-	      if (services.osm && services.osm.isChangesetInflight()) {
-	        _history.clearSaved();
-	        return;
+	    function pointermove() {
+	      if (!lasso) {
+	        lasso = uiLasso(context);
+	        context.surface().call(lasso);
 	      }
 
-	    } else {
-	      canSave = context.selectedIDs().every(function (id) {
-	        var entity = context.hasEntity(id);
-	        return entity && !entity.isDegenerate();
-	      });
+	      lasso.p(context.map().mouse());
 	    }
 
-	    if (canSave) {
-	      _history.save();
+	    function normalize(a, b) {
+	      return [[Math.min(a[0], b[0]), Math.min(a[1], b[1])], [Math.max(a[0], b[0]), Math.max(a[1], b[1])]];
 	    }
-	    if (_history.hasChanges()) {
-	      return _t('save.unsaved_changes');
-	    }
-	  };
 
-	  // Debounce save, since it's a synchronous localStorage write,
-	  // and history changes can happen frequently (e.g. when dragging).
-	  context.debouncedSave = debounce(context.save, 350);
+	    function lassoed() {
+	      if (!lasso) return [];
+	      var graph = context.graph();
+	      var limitToNodes;
 
-	  function withDebouncedSave(fn) {
-	    return function() {
-	      var result = fn.apply(_history, arguments);
-	      context.debouncedSave();
-	      return result;
-	    };
-	  }
+	      if (context.map().editableDataEnabled(true
+	      /* skipZoomCheck */
+	      ) && context.map().isInWideSelection()) {
+	        // only select from the visible nodes
+	        limitToNodes = new Set(utilGetAllNodes(context.selectedIDs(), graph));
+	      } else if (!context.map().editableDataEnabled()) {
+	        return [];
+	      }
 
+	      var bounds = lasso.extent().map(context.projection.invert);
+	      var extent = geoExtent(normalize(bounds[0], bounds[1]));
+	      var intersects = context.history().intersects(extent).filter(function (entity) {
+	        return entity.type === 'node' && (!limitToNodes || limitToNodes.has(entity)) && geoPointInPolygon(context.projection(entity.loc), lasso.coordinates) && !context.features().isHidden(entity, graph, entity.geometry(graph));
+	      }); // sort the lassoed nodes as best we can
 
-	  /* Graph */
-	  context.hasEntity = function (id) { return _history.graph().hasEntity(id); };
-	  context.entity = function (id) { return _history.graph().entity(id); };
+	      intersects.sort(function (node1, node2) {
+	        var parents1 = graph.parentWays(node1);
+	        var parents2 = graph.parentWays(node2);
 
+	        if (parents1.length && parents2.length) {
+	          // both nodes are vertices
+	          var sharedParents = utilArrayIntersection(parents1, parents2);
 
-	  /* Modes */
-	  var _mode;
-	  context.mode = function () { return _mode; };
-	  context.enter = function (newMode) {
-	    if (_mode) {
-	      _mode.exit();
-	      dispatch$1.call('exit', this$1, _mode);
+	          if (sharedParents.length) {
+	            var sharedParentNodes = sharedParents[0].nodes; // vertices are members of the same way; sort them in their listed order
+
+	            return sharedParentNodes.indexOf(node1.id) - sharedParentNodes.indexOf(node2.id);
+	          } else {
+	            // vertices do not share a way; group them by their respective parent ways
+	            return parseFloat(parents1[0].id.slice(1)) - parseFloat(parents2[0].id.slice(1));
+	          }
+	        } else if (parents1.length || parents2.length) {
+	          // only one node is a vertex; sort standalone points before vertices
+	          return parents1.length - parents2.length;
+	        } // both nodes are standalone points; sort left to right
+
+
+	        return node1.loc[0] - node2.loc[0];
+	      });
+	      return intersects.map(function (entity) {
+	        return entity.id;
+	      });
 	    }
 
-	    _mode = newMode;
-	    _mode.enter();
-	    dispatch$1.call('enter', this$1, _mode);
-	  };
+	    function pointerup() {
+	      select(window).on(_pointerPrefix + 'move.lasso', null).on(_pointerPrefix + 'up.lasso', null);
+	      if (!lasso) return;
+	      var ids = lassoed();
+	      lasso.close();
 
-	  context.selectedIDs = function () { return (_mode && _mode.selectedIDs && _mode.selectedIDs()) || []; };
-	  context.activeID = function () { return _mode && _mode.activeID && _mode.activeID(); };
+	      if (ids.length) {
+	        context.enter(modeSelect(context, ids));
+	      }
+	    }
 
-	  var _selectedNoteID;
-	  context.selectedNoteID = function(noteID) {
-	    if (!arguments.length) { return _selectedNoteID; }
-	    _selectedNoteID = noteID;
-	    return context;
+	    selection.on(_pointerPrefix + 'down.lasso', pointerdown);
 	  };
 
-	  // NOTE: Don't change the name of this until UI v3 is merged
-	  var _selectedErrorID;
-	  context.selectedErrorID = function(errorID) {
-	    if (!arguments.length) { return _selectedErrorID; }
-	    _selectedErrorID = errorID;
-	    return context;
+	  behavior.off = function (selection) {
+	    selection.on(_pointerPrefix + 'down.lasso', null);
 	  };
 
+	  return behavior;
+	}
 
-	  /* Behaviors */
-	  context.install = function (behavior) { return context.surface().call(behavior); };
-	  context.uninstall = function (behavior) { return context.surface().call(behavior.off); };
+	function modeBrowse(context) {
+	  var mode = {
+	    button: 'browse',
+	    id: 'browse',
+	    title: _t('modes.browse.title'),
+	    description: _t('modes.browse.description')
+	  };
+	  var sidebar;
 
+	  var _selectBehavior;
 
-	  /* Copy/Paste */
-	  var _copyGraph;
-	  context.copyGraph = function () { return _copyGraph; };
+	  var _behaviors = [];
 
-	  var _copyIDs = [];
-	  context.copyIDs = function(val) {
-	    if (!arguments.length) { return _copyIDs; }
-	    _copyIDs = val;
-	    _copyGraph = _history.graph();
-	    return context;
+	  mode.selectBehavior = function (val) {
+	    if (!arguments.length) return _selectBehavior;
+	    _selectBehavior = val;
+	    return mode;
 	  };
 
-	  var _copyLonLat;
-	  context.copyLonLat = function(val) {
-	    if (!arguments.length) { return _copyLonLat; }
-	    _copyLonLat = val;
-	    return context;
-	  };
+	  mode.enter = function () {
+	    if (!_behaviors.length) {
+	      if (!_selectBehavior) _selectBehavior = behaviorSelect(context);
+	      _behaviors = [behaviorPaste(context), behaviorHover(context).on('hover', context.ui().sidebar.hover), _selectBehavior, behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
+	    }
 
+	    _behaviors.forEach(context.install); // Get focus on the body.
 
-	  /* Background */
-	  var _background;
-	  context.background = function () { return _background; };
 
+	    if (document.activeElement && document.activeElement.blur) {
+	      document.activeElement.blur();
+	    }
 
-	  /* Features */
-	  var _features;
-	  context.features = function () { return _features; };
-	  context.hasHiddenConnections = function (id) {
-	    var graph = _history.graph();
-	    var entity = graph.entity(id);
-	    return _features.hasHiddenConnections(entity, graph);
+	    if (sidebar) {
+	      context.ui().sidebar.show(sidebar);
+	    } else {
+	      context.ui().sidebar.select(null);
+	    }
 	  };
 
+	  mode.exit = function () {
+	    context.ui().sidebar.hover.cancel();
 
-	  /* Photos */
-	  var _photos;
-	  context.photos = function () { return _photos; };
-
+	    _behaviors.forEach(context.uninstall);
 
-	  /* Map */
-	  var _map;
-	  context.map = function () { return _map; };
-	  context.layers = function () { return _map.layers(); };
-	  context.surface = function () { return _map.surface; };
-	  context.editableDataEnabled = function () { return _map.editableDataEnabled(); };
-	  context.surfaceRect = function () { return _map.surface.node().getBoundingClientRect(); };
-	  context.editable = function () {
-	    // don't allow editing during save
-	    var mode = context.mode();
-	    if (!mode || mode.id === 'save') { return false; }
-	    return _map.editableDataEnabled();
+	    if (sidebar) {
+	      context.ui().sidebar.hide();
+	    }
 	  };
 
-
-	  /* Debug */
-	  var _debugFlags = {
-	    tile: false,        // tile boundaries
-	    collision: false,   // label collision bounding boxes
-	    imagery: false,     // imagery bounding polygons
-	    target: false,      // touch targets
-	    downloaded: false   // downloaded data from osm
-	  };
-	  context.debugFlags = function () { return _debugFlags; };
-	  context.getDebug = function (flag) { return flag && _debugFlags[flag]; };
-	  context.setDebug = function(flag, val) {
-	    if (arguments.length === 1) { val = true; }
-	    _debugFlags[flag] = val;
-	    dispatch$1.call('change');
-	    return context;
+	  mode.sidebar = function (_) {
+	    if (!arguments.length) return sidebar;
+	    sidebar = _;
+	    return mode;
 	  };
 
-
-	  /* Container */
-	  var _container = select(null);
-	  context.container = function(val) {
-	    if (!arguments.length) { return _container; }
-	    _container = val;
-	    _container.classed('ideditor', true);
-	    return context;
-	  };
-	  context.containerNode = function(val) {
-	    if (!arguments.length) { return context.container().node(); }
-	    context.container(select(val));
-	    return context;
+	  mode.operations = function () {
+	    return [operationPaste(context)];
 	  };
 
-	  var _embed;
-	  context.embed = function(val) {
-	    if (!arguments.length) { return _embed; }
-	    _embed = val;
-	    return context;
-	  };
+	  return mode;
+	}
 
+	function behaviorAddWay(context) {
+	  var dispatch = dispatch$8('start', 'startFromWay', 'startFromNode');
+	  var draw = behaviorDraw(context);
 
-	  /* Assets */
-	  var _assetPath = '';
-	  context.assetPath = function(val) {
-	    if (!arguments.length) { return _assetPath; }
-	    _assetPath = val;
-	    _mainFileFetcher.assetPath(val);
-	    return context;
-	  };
+	  function behavior(surface) {
+	    draw.on('click', function () {
+	      dispatch.apply('start', this, arguments);
+	    }).on('clickWay', function () {
+	      dispatch.apply('startFromWay', this, arguments);
+	    }).on('clickNode', function () {
+	      dispatch.apply('startFromNode', this, arguments);
+	    }).on('cancel', behavior.cancel).on('finish', behavior.cancel);
+	    context.map().dblclickZoomEnable(false);
+	    surface.call(draw);
+	  }
 
-	  var _assetMap = {};
-	  context.assetMap = function(val) {
-	    if (!arguments.length) { return _assetMap; }
-	    _assetMap = val;
-	    _mainFileFetcher.assetMap(val);
-	    return context;
+	  behavior.off = function (surface) {
+	    surface.call(draw.off);
 	  };
 
-	  context.asset = function (val) {
-	    if (/^http(s)?:\/\//i.test(val)) { return val; }
-	    var filename = _assetPath + val;
-	    return _assetMap[filename] || filename;
+	  behavior.cancel = function () {
+	    window.setTimeout(function () {
+	      context.map().dblclickZoomEnable(true);
+	    }, 1000);
+	    context.enter(modeBrowse(context));
 	  };
 
-	  context.imagePath = function (val) { return context.asset(("img/" + val)); };
+	  return utilRebind(behavior, dispatch, 'on');
+	}
 
+	function behaviorHash(context) {
+	  // cached window.location.hash
+	  var _cachedHash = null; // allowable latitude range
+
+	  var _latitudeLimit = 90 - 1e-8;
+
+	  function computedHashParameters() {
+	    var map = context.map();
+	    var center = map.center();
+	    var zoom = map.zoom();
+	    var precision = Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
+	    var oldParams = utilObjectOmit(utilStringQs(window.location.hash), ['comment', 'source', 'hashtags', 'walkthrough']);
+	    var newParams = {};
+	    delete oldParams.id;
+	    var selected = context.selectedIDs().filter(function (id) {
+	      return context.hasEntity(id);
+	    });
 
-	  /* reset (aka flush) */
-	  context.reset = context.flush = function () {
-	    context.debouncedSave.cancel();
+	    if (selected.length) {
+	      newParams.id = selected.join(',');
+	    }
 
-	    Array.from(_deferred).forEach(function (handle) {
-	      window.cancelIdleCallback(handle);
-	      _deferred.delete(handle);
+	    newParams.map = zoom.toFixed(2) + '/' + center[1].toFixed(precision) + '/' + center[0].toFixed(precision);
+	    return Object.assign(oldParams, newParams);
+	  }
+
+	  function computedHash() {
+	    return '#' + utilQsString(computedHashParameters(), true);
+	  }
+
+	  function computedTitle(includeChangeCount) {
+	    var baseTitle = context.documentTitleBase() || 'iD';
+	    var contextual;
+	    var changeCount;
+	    var titleID;
+	    var selected = context.selectedIDs().filter(function (id) {
+	      return context.hasEntity(id);
 	    });
 
-	    Object.values(services).forEach(function (service) {
-	      if (service && typeof service.reset === 'function') {
-	        service.reset(context);
+	    if (selected.length) {
+	      var firstLabel = utilDisplayLabel(context.entity(selected[0]), context.graph());
+
+	      if (selected.length > 1) {
+	        contextual = _t('title.labeled_and_more', {
+	          labeled: firstLabel,
+	          count: selected.length - 1
+	        });
+	      } else {
+	        contextual = firstLabel;
 	      }
-	    });
 
-	    context.changeset = null;
+	      titleID = 'context';
+	    }
 
-	    _validator.reset();
-	    _features.reset();
-	    _history.reset();
-	    _uploader.reset();
+	    if (includeChangeCount) {
+	      changeCount = context.history().difference().summary().length;
 
-	    // don't leave stale state in the inspector
-	    context.container().select('.inspector-wrap *').remove();
+	      if (changeCount > 0) {
+	        titleID = contextual ? 'changes_context' : 'changes';
+	      }
+	    }
 
-	    return context;
-	  };
+	    if (titleID) {
+	      return _t('title.format.' + titleID, {
+	        changes: changeCount,
+	        base: baseTitle,
+	        context: contextual
+	      });
+	    }
 
+	    return baseTitle;
+	  }
 
-	  /* Projections */
-	  context.projection = geoRawMercator();
-	  context.curtainProjection = geoRawMercator();
+	  function updateTitle(includeChangeCount) {
+	    if (!context.setsDocumentTitle()) return;
+	    var newTitle = computedTitle(includeChangeCount);
 
+	    if (document.title !== newTitle) {
+	      document.title = newTitle;
+	    }
+	  }
 
-	  /* Init */
-	  context.init = function () {
+	  function updateHashIfNeeded() {
+	    if (context.inIntro()) return;
+	    var latestHash = computedHash();
 
-	    instantiateInternal();
+	    if (_cachedHash !== latestHash) {
+	      _cachedHash = latestHash; // Update the URL hash without affecting the browser navigation stack,
+	      // though unavoidably creating a browser history entry
 
-	    initializeDependents();
+	      window.history.replaceState(null, computedTitle(false
+	      /* includeChangeCount */
+	      ), latestHash); // set the title we want displayed for the browser tab/window
 
-	    return context;
+	      updateTitle(true
+	      /* includeChangeCount */
+	      );
+	    }
+	  }
 
-	    // Load variables and properties. No property of `context` should be accessed
-	    // until this is complete since load statuses are indeterminate. The order
-	    // of instantiation shouldn't matter.
-	    function instantiateInternal() {
+	  var _throttledUpdate = throttle(updateHashIfNeeded, 500);
 
-	      _history = coreHistory(context);
-	      context.graph = _history.graph;
-	      context.pauseChangeDispatch = _history.pauseChangeDispatch;
-	      context.resumeChangeDispatch = _history.resumeChangeDispatch;
-	      context.perform = withDebouncedSave(_history.perform);
-	      context.replace = withDebouncedSave(_history.replace);
-	      context.pop = withDebouncedSave(_history.pop);
-	      context.overwrite = withDebouncedSave(_history.overwrite);
-	      context.undo = withDebouncedSave(_history.undo);
-	      context.redo = withDebouncedSave(_history.redo);
+	  var _throttledUpdateTitle = throttle(function () {
+	    updateTitle(true
+	    /* includeChangeCount */
+	    );
+	  }, 500);
+
+	  function hashchange() {
+	    // ignore spurious hashchange events
+	    if (window.location.hash === _cachedHash) return;
+	    _cachedHash = window.location.hash;
+	    var q = utilStringQs(_cachedHash);
+	    var mapArgs = (q.map || '').split('/').map(Number);
+
+	    if (mapArgs.length < 3 || mapArgs.some(isNaN)) {
+	      // replace bogus hash
+	      updateHashIfNeeded();
+	    } else {
+	      // don't update if the new hash already reflects the state of iD
+	      if (_cachedHash === computedHash()) return;
+	      var mode = context.mode();
+	      context.map().centerZoom([mapArgs[2], Math.min(_latitudeLimit, Math.max(-_latitudeLimit, mapArgs[1]))], mapArgs[0]);
+
+	      if (q.id && mode) {
+	        var ids = q.id.split(',').filter(function (id) {
+	          return context.hasEntity(id);
+	        });
 
-	      _validator = coreValidator(context);
-	      _uploader = coreUploader(context);
+	        if (ids.length && (mode.id === 'browse' || mode.id === 'select' && !utilArrayIdentical(mode.selectedIDs(), ids))) {
+	          context.enter(modeSelect(context, ids));
+	          return;
+	        }
+	      }
 
-	      _background = rendererBackground(context);
-	      _features = rendererFeatures(context);
-	      _map = rendererMap(context);
-	      _photos = rendererPhotos(context);
+	      var center = context.map().center();
+	      var dist = geoSphericalDistance(center, [mapArgs[2], mapArgs[1]]);
+	      var maxdist = 500; // Don't allow the hash location to change too much while drawing
+	      // This can happen if the user accidentally hit the back button.  #3996
 
-	      _ui = uiInit(context);
+	      if (mode && mode.id.match(/^draw/) !== null && dist > maxdist) {
+	        context.enter(modeBrowse(context));
+	        return;
+	      }
 	    }
+	  }
 
-	    // Set up objects that might need to access properties of `context`. The order
-	    // might matter if dependents make calls to each other. Be wary of async calls.
-	    function initializeDependents() {
+	  function behavior() {
+	    context.map().on('move.behaviorHash', _throttledUpdate);
+	    context.history().on('change.behaviorHash', _throttledUpdateTitle);
+	    context.on('enter.behaviorHash', _throttledUpdate);
+	    select(window).on('hashchange.behaviorHash', hashchange);
 
-	      if (context.initialHashParams.presets) {
-	        _mainPresetIndex.addablePresetIDs(new Set(context.initialHashParams.presets.split(',')));
+	    if (window.location.hash) {
+	      var q = utilStringQs(window.location.hash);
+
+	      if (q.id) {
+	        //if (!context.history().hasRestorableChanges()) {
+	        // targeting specific features: download, select, and zoom to them
+	        context.zoomToEntity(q.id.split(',')[0], !q.map); //}
 	      }
 
-	      if (context.initialHashParams.locale) {
-	        _mainLocalizer.preferredLocaleCodes(context.initialHashParams.locale);
+	      if (q.walkthrough === 'true') {
+	        behavior.startWalkthrough = true;
 	      }
 
-	      // kick off some async work
-	      _mainLocalizer.ensureLoaded();
-	      _background.ensureLoaded();
-	      _mainPresetIndex.ensureLoaded();
+	      if (q.map) {
+	        behavior.hadHash = true;
+	      }
 
-	      Object.values(services).forEach(function (service) {
-	        if (service && typeof service.init === 'function') {
-	          service.init();
-	        }
-	      });
+	      hashchange();
+	      updateTitle(false);
+	    }
+	  }
 
-	      _map.init();
-	      _validator.init();
-	      _features.init();
-	      _photos.init();
+	  behavior.off = function () {
+	    _throttledUpdate.cancel();
 
-	      if (services.maprules && context.initialHashParams.maprules) {
-	        d3_json(context.initialHashParams.maprules)
-	          .then(function (mapcss) {
-	            services.maprules.init();
-	            mapcss.forEach(function (mapcssSelector) { return services.maprules.addRule(mapcssSelector); });
-	          })
-	          .catch(function () { /* ignore */ });
-	      }
+	    _throttledUpdateTitle.cancel();
 
-	      // if the container isn't available, e.g. when testing, don't load the UI
-	      if (!context.container().empty()) { _ui.ensureLoaded(); }
-	    }
+	    context.map().on('move.behaviorHash', null);
+	    context.on('enter.behaviorHash', null);
+	    select(window).on('hashchange.behaviorHash', null);
+	    window.location.hash = '';
 	  };
 
-
-	  return context;
+	  return behavior;
 	}
 
-	// When `debug = true`, we use `Object.freeze` on immutables in iD.
 	// This is only done in testing because of the performance penalty.
-	var debug = false;
+
+	var debug = false; // Reexport just what our tests use, see #4379
 	var d3 = {
-	  customEvent: customEvent,
-	  dispatch:  dispatch,
-	  event:  event,
+	  dispatch: dispatch$8,
 	  geoMercator: mercator,
 	  geoProjection: projection,
 	  polygonArea: d3_polygonArea,
@@ -118661,6 +103499,7 @@
 		actionReverse: actionReverse,
 		actionRevert: actionRevert,
 		actionRotate: actionRotate,
+		actionScale: actionScale,
 		actionSplit: actionSplit,
 		actionStraightenNodes: actionStraightenNodes,
 		actionStraightenWay: actionStraightenWay,
@@ -118688,6 +103527,8 @@
 		coreLocalizer: coreLocalizer,
 		t: _t,
 		localizer: _mainLocalizer,
+		coreLocations: coreLocations,
+		locationManager: _mainLocations,
 		prefs: corePreferences,
 		coreTree: coreTree,
 		coreUploader: coreUploader,
@@ -118818,6 +103659,7 @@
 		serviceMapillary: serviceMapillary,
 		serviceMapRules: serviceMapRules,
 		serviceNominatim: serviceNominatim,
+		serviceNsi: serviceNsi,
 		serviceOpenstreetcam: serviceOpenstreetcam,
 		serviceOsm: serviceOsm,
 		serviceOsmWikibase: serviceOsmWikibase,
@@ -118858,6 +103700,7 @@
 		uiFieldDefaultCheck: uiFieldCheck,
 		uiFieldOnewayCheck: uiFieldCheck,
 		uiFieldCheck: uiFieldCheck,
+		uiFieldManyCombo: uiFieldCombo,
 		uiFieldMultiCombo: uiFieldCombo,
 		uiFieldNetworkCombo: uiFieldCombo,
 		uiFieldSemiCombo: uiFieldCombo,
@@ -118874,7 +103717,8 @@
 		uiFieldCycleway: uiFieldCycleway,
 		uiFieldLanes: uiFieldLanes,
 		uiFieldLocalized: uiFieldLocalized,
-		uiFieldMaxspeed: uiFieldMaxspeed,
+		uiFieldRoadheight: uiFieldRoadheight,
+		uiFieldRoadspeed: uiFieldRoadspeed,
 		uiFieldStructureRadio: uiFieldRadio,
 		uiFieldRadio: uiFieldRadio,
 		uiFieldRestrictions: uiFieldRestrictions,
@@ -119000,9 +103844,10 @@
 		utilDisplayLabel: utilDisplayLabel,
 		utilEntityRoot: utilEntityRoot,
 		utilEditDistance: utilEditDistance,
-		utilEntitySelector: utilEntitySelector,
+		utilEntityAndDeepMemberIDs: utilEntityAndDeepMemberIDs,
 		utilEntityOrMemberSelector: utilEntityOrMemberSelector,
 		utilEntityOrDeepMemberSelector: utilEntityOrDeepMemberSelector,
+		utilEntitySelector: utilEntitySelector,
 		utilFastMouse: utilFastMouse,
 		utilFunctor: utilFunctor,
 		utilGetAllNodes: utilGetAllNodes,
@@ -119047,24 +103892,21 @@
 		validationUnsquareWay: validationUnsquareWay
 	});
 
-	// polyfill requestIdleCallback
-	window.requestIdleCallback = window.requestIdleCallback ||
-	    function(cb) {
-	        var start = Date.now();
-	        return window.requestAnimationFrame(function() {
-	            cb({
-	                didTimeout: false,
-	                timeRemaining: function() {
-	                    return Math.max(0, 50 - (Date.now() - start));
-	                }
-	            });
-	        });
-	    };
+	window.requestIdleCallback = window.requestIdleCallback || function (cb) {
+	  var start = Date.now();
+	  return window.requestAnimationFrame(function () {
+	    cb({
+	      didTimeout: false,
+	      timeRemaining: function timeRemaining() {
+	        return Math.max(0, 50 - (Date.now() - start));
+	      }
+	    });
+	  });
+	};
 
-	window.cancelIdleCallback = window.cancelIdleCallback ||
-	    function(id) {
-	        window.cancelAnimationFrame(id);
-	    };
+	window.cancelIdleCallback = window.cancelIdleCallback || function (id) {
+	  window.cancelAnimationFrame(id);
+	};
 	window.iD = iD;
 
 }());